diff --git a/vendor.conf b/vendor.conf index 1428a1b59..92092a2ac 100644 --- a/vendor.conf +++ b/vendor.conf @@ -13,6 +13,7 @@ github.com/golang/snappy d9eb7a3 github.com/hashicorp/golang-lru 0a025b7 github.com/huin/goupnp 679507a github.com/jackpal/go-nat-pmp v1.0.1-4-g1fa385a +github.com/karalabe/gousb ffa821b github.com/maruel/panicparse ad66119 github.com/mattn/go-colorable v0.0.6-9-gd228849 github.com/mattn/go-isatty 30a891c diff --git a/vendor/github.com/karalabe/gousb/.gitignore b/vendor/github.com/karalabe/gousb/.gitignore new file mode 100644 index 000000000..dbec55fb6 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/.gitignore @@ -0,0 +1 @@ +*.sw[op] diff --git a/vendor/github.com/karalabe/gousb/.travis.yml b/vendor/github.com/karalabe/gousb/.travis.yml new file mode 100644 index 000000000..2029cc478 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/.travis.yml @@ -0,0 +1,12 @@ +language: go + +matrix: + include: + - os: linux + dist: trusty + go: 1.7.4 + - os: osx + go: 1.7.4 + +script: + - go test -v -test.run='BCD|Parse' ./... diff --git a/vendor/github.com/karalabe/gousb/LICENSE b/vendor/github.com/karalabe/gousb/LICENSE new file mode 100644 index 000000000..d64569567 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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Supported platforms include Linux, macOS and Windows as well as the mobile platforms Android and iOS. + +This package is a fork of [`github.com/kylelemons/gousb`](https://github.com/kylelemons/gousb), which at the moment seems to be unmaintained. The current fork is different from the upstream package as it contains code to embed `libusb` directly into the Go package (thus becoming fully self-cotnained and go-gettable), as well as it features a few contributions and bugfixes that never really got addressed in the upstream package, but which address important issues nonetheless. + +*Note, if @kylelemons decides to pick development of the upstream project up again, consider all commits made by me to this repo as ready contributions. I cannot vouch for other commits as the upstream repo needs a signed CLA for Google.* + +[travisimg]: https://travis-ci.org/karalabe/gousb.svg?branch=master +[travis]: https://travis-ci.org/karalabe/gousb +[appveyorimg]: https://ci.appveyor.com/api/projects/status/84k9xse10rl72gn2/branch/master?svg=true +[appveyor]: https://ci.appveyor.com/project/karalabe/gousb +[docimg]: https://godoc.org/github.com/karalabe/gousb?status.svg +[doc]: https://godoc.org/github.com/karalabe/gousb + +Installation +============ + +Example: lsusb +-------------- +The gousb project provides a simple but useful example: lsusb. This binary will list the USB devices connected to your system and various interesting tidbits about them, their configurations, endpoints, etc. To install it, run the following command: + + go get -v github.com/karalabe/gousb/lsusb + +gousb +----- +If you installed the lsusb example, both libraries below are already installed. + +Installing the primary gousb package is really easy: + + go get -v github.com/karalabe/gousb/usb + +There is also a `usbid` package that will not be installed by default by this command, but which provides useful information including the human-readable vendor and product codes for detected hardware. It's not installed by default and not linked into the `usb` package by default because it adds ~400kb to the resulting binary. If you want both, they can be installed thus: + + go get -v github.com/karalabe/gousb/usb{,id} + +Documentation +============= +The documentation can be viewed via local godoc or via the excellent [godoc.org](http://godoc.org/): + +- [usb](http://godoc.org/github.com/karalabe/gousb/usb) +- [usbid](http://godoc.org/pkg/github.com/karalabe/gousb/usbid) diff --git a/vendor/github.com/karalabe/gousb/appveyor.yml b/vendor/github.com/karalabe/gousb/appveyor.yml new file mode 100644 index 000000000..b24986202 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/appveyor.yml @@ -0,0 +1,34 @@ +os: Visual Studio 2015 + +# Clone directly into GOPATH. +clone_folder: C:\gopath\src\github.com\karalabe\gousb +clone_depth: 5 +version: "{branch}.{build}" +environment: + global: + GOPATH: C:\gopath + CC: gcc.exe + matrix: + - GOARCH: amd64 + MSYS2_ARCH: x86_64 + MSYS2_BITS: 64 + MSYSTEM: MINGW64 + PATH: C:\msys64\mingw64\bin\;%PATH% + - GOARCH: 386 + MSYS2_ARCH: i686 + MSYS2_BITS: 32 + MSYSTEM: MINGW32 + PATH: C:\msys64\mingw32\bin\;%PATH% + +install: + - rmdir C:\go /s /q + - appveyor DownloadFile https://storage.googleapis.com/golang/go1.7.4.windows-%GOARCH%.zip + - 7z x go1.7.4.windows-%GOARCH%.zip -y -oC:\ > NUL + - go version + - gcc --version + +build_script: + - go install ./... + +test_script: + - go test -v -test.run="BCD|Parse" ./... diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/AUTHORS b/vendor/github.com/karalabe/gousb/internal/libusb/AUTHORS new file mode 100644 index 000000000..70d407bd1 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/AUTHORS @@ -0,0 +1,89 @@ +Copyright © 2001 Johannes Erdfelt +Copyright © 2007-2009 Daniel Drake +Copyright © 2010-2012 Peter Stuge +Copyright © 2008-2016 Nathan Hjelm +Copyright © 2009-2013 Pete Batard +Copyright © 2009-2013 Ludovic Rousseau +Copyright © 2010-2012 Michael Plante +Copyright © 2011-2013 Hans de Goede +Copyright © 2012-2013 Martin Pieuchot +Copyright © 2012-2013 Toby Gray +Copyright © 2013-2015 Chris Dickens + +Other contributors: +Akshay Jaggi +Alan Ott +Alan Stern +Alex Vatchenko +Andrew Fernandes +Anthony Clay +Antonio Ospite +Artem Egorkine +Aurelien Jarno +Bastien Nocera +Bei Zhang +Benjamin Dobell +Carl Karsten +Colin Walters +Dave Camarillo +David Engraf +David Moore +Davidlohr Bueso +Federico Manzan +Felipe Balbi +Florian Albrechtskirchinger +Francesco Montorsi +Francisco Facioni +Gaurav Gupta +Graeme Gill +Gustavo Zacarias +Hans Ulrich Niedermann +Hector Martin +Hoi-Ho Chan +Ilya Konstantinov +James Hanko +John Sheu +Joshua Blake +Justin Bischoff +Karsten Koenig +Konrad Rzepecki +Kuangye Guo +Lars Kanis +Lars Wirzenius +Luca Longinotti +Marcus Meissner +Markus Heidelberg +Martin Ettl +Martin Koegler +Matthias Bolte +Mike Frysinger +Mikhail Gusarov +Moritz Fischer +Ларионов Даниил +Nicholas Corgan +Omri Iluz +Orin Eman +Paul Fertser +Pekka Nikander +Rob Walker +Sean McBride +Sebastian Pipping +Simon Haggett +Simon Newton +Thomas Röfer +Tim Hutt +Tim Roberts +Tobias Klauser +Toby Peterson +Tormod Volden +Trygve Laugstøl +Uri Lublin +Vasily Khoruzhick +Vegard Storheil Eriksen +Venkatesh Shukla +Vitali Lovich +Xiaofan Chen +Zoltán Kovács +Роман Донченко +parafin +xantares diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/COPYING b/vendor/github.com/karalabe/gousb/internal/libusb/COPYING new file mode 100644 index 000000000..5ab7695ab --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/COPYING @@ -0,0 +1,504 @@ + GNU LESSER GENERAL PUBLIC LICENSE + Version 2.1, February 1999 + + Copyright (C) 1991, 1999 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +[This is the first released version of the Lesser GPL. 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See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "config.h" + +#include +#include +#include +#include +#include +#ifdef HAVE_SYS_TYPES_H +#include +#endif +#ifdef HAVE_SYS_TIME_H +#include +#endif +#ifdef HAVE_SYSLOG_H +#include +#endif + +#ifdef __ANDROID__ +#include +#endif + +#include "libusbi.h" +#include "hotplug.h" + +#if defined(OS_LINUX) +const struct usbi_os_backend * const usbi_backend = &linux_usbfs_backend; +#elif defined(OS_DARWIN) +const struct usbi_os_backend * const usbi_backend = &darwin_backend; +#elif defined(OS_OPENBSD) +const struct usbi_os_backend * const usbi_backend = &openbsd_backend; +#elif defined(OS_NETBSD) +const struct usbi_os_backend * const usbi_backend = &netbsd_backend; +#elif defined(OS_WINDOWS) + +#if defined(USE_USBDK) +const struct usbi_os_backend * const usbi_backend = &usbdk_backend; +#else +const struct usbi_os_backend * const usbi_backend = &windows_backend; +#endif + +#elif defined(OS_WINCE) +const struct usbi_os_backend * const usbi_backend = &wince_backend; +#elif defined(OS_HAIKU) +const struct usbi_os_backend * const usbi_backend = &haiku_usb_raw_backend; +#elif defined (OS_SUNOS) +const struct usbi_os_backend * const usbi_backend = &sunos_backend; +#else +#error "Unsupported OS" +#endif + +struct libusb_context *usbi_default_context = NULL; +static const struct libusb_version libusb_version_internal = + { LIBUSB_MAJOR, LIBUSB_MINOR, LIBUSB_MICRO, LIBUSB_NANO, + LIBUSB_RC, "http://libusb.info" }; +static int default_context_refcnt = 0; +static usbi_mutex_static_t default_context_lock = USBI_MUTEX_INITIALIZER; +static struct timespec timestamp_origin = { 0, 0 }; + +usbi_mutex_static_t active_contexts_lock = USBI_MUTEX_INITIALIZER; +struct list_head active_contexts_list; + +/** + * \mainpage libusb-1.0 API Reference + * + * \section intro Introduction + * + * libusb is an open source library that allows you to communicate with USB + * devices from userspace. For more info, see the + * libusb homepage. + * + * This documentation is aimed at application developers wishing to + * communicate with USB peripherals from their own software. After reviewing + * this documentation, feedback and questions can be sent to the + * libusb-devel mailing list. + * + * This documentation assumes knowledge of how to operate USB devices from + * a software standpoint (descriptors, configurations, interfaces, endpoints, + * control/bulk/interrupt/isochronous transfers, etc). Full information + * can be found in the USB 3.0 + * Specification which is available for free download. You can probably + * find less verbose introductions by searching the web. + * + * \section API Application Programming Interface (API) + * + * See the \ref libusb_api page for a complete list of the libusb functions. + * + * \section features Library features + * + * - All transfer types supported (control/bulk/interrupt/isochronous) + * - 2 transfer interfaces: + * -# Synchronous (simple) + * -# Asynchronous (more complicated, but more powerful) + * - Thread safe (although the asynchronous interface means that you + * usually won't need to thread) + * - Lightweight with lean API + * - Compatible with libusb-0.1 through the libusb-compat-0.1 translation layer + * - Hotplug support (on some platforms). See \ref libusb_hotplug. + * + * \section gettingstarted Getting Started + * + * To begin reading the API documentation, start with the Modules page which + * links to the different categories of libusb's functionality. + * + * One decision you will have to make is whether to use the synchronous + * or the asynchronous data transfer interface. The \ref libusb_io documentation + * provides some insight into this topic. + * + * Some example programs can be found in the libusb source distribution under + * the "examples" subdirectory. The libusb homepage includes a list of + * real-life project examples which use libusb. + * + * \section errorhandling Error handling + * + * libusb functions typically return 0 on success or a negative error code + * on failure. These negative error codes relate to LIBUSB_ERROR constants + * which are listed on the \ref libusb_misc "miscellaneous" documentation page. + * + * \section msglog Debug message logging + * + * libusb uses stderr for all logging. By default, logging is set to NONE, + * which means that no output will be produced. However, unless the library + * has been compiled with logging disabled, then any application calls to + * libusb_set_debug(), or the setting of the environmental variable + * LIBUSB_DEBUG outside of the application, can result in logging being + * produced. Your application should therefore not close stderr, but instead + * direct it to the null device if its output is undesirable. + * + * The libusb_set_debug() function can be used to enable logging of certain + * messages. Under standard configuration, libusb doesn't really log much + * so you are advised to use this function to enable all error/warning/ + * informational messages. It will help debug problems with your software. + * + * The logged messages are unstructured. There is no one-to-one correspondence + * between messages being logged and success or failure return codes from + * libusb functions. There is no format to the messages, so you should not + * try to capture or parse them. They are not and will not be localized. + * These messages are not intended to being passed to your application user; + * instead, you should interpret the error codes returned from libusb functions + * and provide appropriate notification to the user. The messages are simply + * there to aid you as a programmer, and if you're confused because you're + * getting a strange error code from a libusb function, enabling message + * logging may give you a suitable explanation. + * + * The LIBUSB_DEBUG environment variable can be used to enable message logging + * at run-time. This environment variable should be set to a log level number, + * which is interpreted the same as the libusb_set_debug() parameter. When this + * environment variable is set, the message logging verbosity level is fixed + * and libusb_set_debug() effectively does nothing. + * + * libusb can be compiled without any logging functions, useful for embedded + * systems. In this case, libusb_set_debug() and the LIBUSB_DEBUG environment + * variable have no effects. + * + * libusb can also be compiled with verbose debugging messages always. When + * the library is compiled in this way, all messages of all verbosities are + * always logged. libusb_set_debug() and the LIBUSB_DEBUG environment variable + * have no effects. + * + * \section remarks Other remarks + * + * libusb does have imperfections. The \ref libusb_caveats "caveats" page attempts + * to document these. + */ + +/** + * \page libusb_caveats Caveats + * + * \section devresets Device resets + * + * The libusb_reset_device() function allows you to reset a device. If your + * program has to call such a function, it should obviously be aware that + * the reset will cause device state to change (e.g. register values may be + * reset). + * + * The problem is that any other program could reset the device your program + * is working with, at any time. libusb does not offer a mechanism to inform + * you when this has happened, so if someone else resets your device it will + * not be clear to your own program why the device state has changed. + * + * Ultimately, this is a limitation of writing drivers in userspace. + * Separation from the USB stack in the underlying kernel makes it difficult + * for the operating system to deliver such notifications to your program. + * The Linux kernel USB stack allows such reset notifications to be delivered + * to in-kernel USB drivers, but it is not clear how such notifications could + * be delivered to second-class drivers that live in userspace. + * + * \section blockonly Blocking-only functionality + * + * The functionality listed below is only available through synchronous, + * blocking functions. There are no asynchronous/non-blocking alternatives, + * and no clear ways of implementing these. + * + * - Configuration activation (libusb_set_configuration()) + * - Interface/alternate setting activation (libusb_set_interface_alt_setting()) + * - Releasing of interfaces (libusb_release_interface()) + * - Clearing of halt/stall condition (libusb_clear_halt()) + * - Device resets (libusb_reset_device()) + * + * \section configsel Configuration selection and handling + * + * When libusb presents a device handle to an application, there is a chance + * that the corresponding device may be in unconfigured state. For devices + * with multiple configurations, there is also a chance that the configuration + * currently selected is not the one that the application wants to use. + * + * The obvious solution is to add a call to libusb_set_configuration() early + * on during your device initialization routines, but there are caveats to + * be aware of: + * -# If the device is already in the desired configuration, calling + * libusb_set_configuration() using the same configuration value will cause + * a lightweight device reset. This may not be desirable behaviour. + * -# In the case where the desired configuration is already active, libusb + * may not even be able to perform a lightweight device reset. For example, + * take my USB keyboard with fingerprint reader: I'm interested in driving + * the fingerprint reader interface through libusb, but the kernel's + * USB-HID driver will almost always have claimed the keyboard interface. + * Because the kernel has claimed an interface, it is not even possible to + * perform the lightweight device reset, so libusb_set_configuration() will + * fail. (Luckily the device in question only has a single configuration.) + * -# libusb will be unable to set a configuration if other programs or + * drivers have claimed interfaces. In particular, this means that kernel + * drivers must be detached from all the interfaces before + * libusb_set_configuration() may succeed. + * + * One solution to some of the above problems is to consider the currently + * active configuration. If the configuration we want is already active, then + * we don't have to select any configuration: +\code +cfg = -1; +libusb_get_configuration(dev, &cfg); +if (cfg != desired) + libusb_set_configuration(dev, desired); +\endcode + * + * This is probably suitable for most scenarios, but is inherently racy: + * another application or driver may change the selected configuration + * after the libusb_get_configuration() call. + * + * Even in cases where libusb_set_configuration() succeeds, consider that other + * applications or drivers may change configuration after your application + * calls libusb_set_configuration(). + * + * One possible way to lock your device into a specific configuration is as + * follows: + * -# Set the desired configuration (or use the logic above to realise that + * it is already in the desired configuration) + * -# Claim the interface that you wish to use + * -# Check that the currently active configuration is the one that you want + * to use. + * + * The above method works because once an interface is claimed, no application + * or driver is able to select another configuration. + * + * \section earlycomp Early transfer completion + * + * NOTE: This section is currently Linux-centric. I am not sure if any of these + * considerations apply to Darwin or other platforms. + * + * When a transfer completes early (i.e. when less data is received/sent in + * any one packet than the transfer buffer allows for) then libusb is designed + * to terminate the transfer immediately, not transferring or receiving any + * more data unless other transfers have been queued by the user. + * + * On legacy platforms, libusb is unable to do this in all situations. After + * the incomplete packet occurs, "surplus" data may be transferred. For recent + * versions of libusb, this information is kept (the data length of the + * transfer is updated) and, for device-to-host transfers, any surplus data was + * added to the buffer. Still, this is not a nice solution because it loses the + * information about the end of the short packet, and the user probably wanted + * that surplus data to arrive in the next logical transfer. + * + * + * \section zlp Zero length packets + * + * - libusb is able to send a packet of zero length to an endpoint simply by + * submitting a transfer of zero length. + * - The \ref libusb_transfer_flags::LIBUSB_TRANSFER_ADD_ZERO_PACKET + * "LIBUSB_TRANSFER_ADD_ZERO_PACKET" flag is currently only supported on Linux. + */ + +/** + * \page libusb_contexts Contexts + * + * It is possible that libusb may be used simultaneously from two independent + * libraries linked into the same executable. For example, if your application + * has a plugin-like system which allows the user to dynamically load a range + * of modules into your program, it is feasible that two independently + * developed modules may both use libusb. + * + * libusb is written to allow for these multiple user scenarios. The two + * "instances" of libusb will not interfere: libusb_set_debug() calls + * from one user will not affect the same settings for other users, other + * users can continue using libusb after one of them calls libusb_exit(), etc. + * + * This is made possible through libusb's context concept. When you + * call libusb_init(), you are (optionally) given a context. You can then pass + * this context pointer back into future libusb functions. + * + * In order to keep things simple for more simplistic applications, it is + * legal to pass NULL to all functions requiring a context pointer (as long as + * you're sure no other code will attempt to use libusb from the same process). + * When you pass NULL, the default context will be used. The default context + * is created the first time a process calls libusb_init() when no other + * context is alive. Contexts are destroyed during libusb_exit(). + * + * The default context is reference-counted and can be shared. That means that + * if libusb_init(NULL) is called twice within the same process, the two + * users end up sharing the same context. The deinitialization and freeing of + * the default context will only happen when the last user calls libusb_exit(). + * In other words, the default context is created and initialized when its + * reference count goes from 0 to 1, and is deinitialized and destroyed when + * its reference count goes from 1 to 0. + * + * You may be wondering why only a subset of libusb functions require a + * context pointer in their function definition. Internally, libusb stores + * context pointers in other objects (e.g. libusb_device instances) and hence + * can infer the context from those objects. + */ + + /** + * \page libusb_api Application Programming Interface + * + * This is the complete list of libusb functions, structures and + * enumerations in alphabetical order. + * + * \section Functions + * - libusb_alloc_streams() + * - libusb_alloc_transfer() + * - libusb_attach_kernel_driver() + * - libusb_bulk_transfer() + * - libusb_cancel_transfer() + * - libusb_claim_interface() + * - libusb_clear_halt() + * - libusb_close() + * - libusb_control_transfer() + * - libusb_control_transfer_get_data() + * - libusb_control_transfer_get_setup() + * - libusb_cpu_to_le16() + * - libusb_detach_kernel_driver() + * - libusb_dev_mem_alloc() + * - libusb_dev_mem_free() + * - libusb_error_name() + * - libusb_event_handler_active() + * - libusb_event_handling_ok() + * - libusb_exit() + * - libusb_fill_bulk_stream_transfer() + * - libusb_fill_bulk_transfer() + * - libusb_fill_control_setup() + * - libusb_fill_control_transfer() + * - libusb_fill_interrupt_transfer() + * - libusb_fill_iso_transfer() + * - libusb_free_bos_descriptor() + * - libusb_free_config_descriptor() + * - libusb_free_container_id_descriptor() + * - libusb_free_device_list() + * - libusb_free_pollfds() + * - libusb_free_ss_endpoint_companion_descriptor() + * - libusb_free_ss_usb_device_capability_descriptor() + * - libusb_free_streams() + * - libusb_free_transfer() + * - libusb_free_usb_2_0_extension_descriptor() + * - libusb_get_active_config_descriptor() + * - libusb_get_bos_descriptor() + * - libusb_get_bus_number() + * - libusb_get_config_descriptor() + * - libusb_get_config_descriptor_by_value() + * - libusb_get_configuration() + * - libusb_get_container_id_descriptor() + * - libusb_get_descriptor() + * - libusb_get_device() + * - libusb_get_device_address() + * - libusb_get_device_descriptor() + * - libusb_get_device_list() + * - libusb_get_device_speed() + * - libusb_get_iso_packet_buffer() + * - libusb_get_iso_packet_buffer_simple() + * - libusb_get_max_iso_packet_size() + * - libusb_get_max_packet_size() + * - libusb_get_next_timeout() + * - libusb_get_parent() + * - libusb_get_pollfds() + * - libusb_get_port_number() + * - libusb_get_port_numbers() + * - libusb_get_port_path() + * - libusb_get_ss_endpoint_companion_descriptor() + * - libusb_get_ss_usb_device_capability_descriptor() + * - libusb_get_string_descriptor() + * - libusb_get_string_descriptor_ascii() + * - libusb_get_usb_2_0_extension_descriptor() + * - libusb_get_version() + * - libusb_handle_events() + * - libusb_handle_events_completed() + * - libusb_handle_events_locked() + * - libusb_handle_events_timeout() + * - libusb_handle_events_timeout_completed() + * - libusb_has_capability() + * - libusb_hotplug_deregister_callback() + * - libusb_hotplug_register_callback() + * - libusb_init() + * - libusb_interrupt_event_handler() + * - libusb_interrupt_transfer() + * - libusb_kernel_driver_active() + * - libusb_lock_events() + * - libusb_lock_event_waiters() + * - libusb_open() + * - libusb_open_device_with_vid_pid() + * - libusb_pollfds_handle_timeouts() + * - libusb_ref_device() + * - libusb_release_interface() + * - libusb_reset_device() + * - libusb_set_auto_detach_kernel_driver() + * - libusb_set_configuration() + * - libusb_set_debug() + * - libusb_set_interface_alt_setting() + * - libusb_set_iso_packet_lengths() + * - libusb_setlocale() + * - libusb_set_pollfd_notifiers() + * - libusb_strerror() + * - libusb_submit_transfer() + * - libusb_transfer_get_stream_id() + * - libusb_transfer_set_stream_id() + * - libusb_try_lock_events() + * - libusb_unlock_events() + * - libusb_unlock_event_waiters() + * - libusb_unref_device() + * - libusb_wait_for_event() + * + * \section Structures + * - libusb_bos_descriptor + * - libusb_bos_dev_capability_descriptor + * - libusb_config_descriptor + * - libusb_container_id_descriptor + * - \ref libusb_context + * - libusb_control_setup + * - \ref libusb_device + * - libusb_device_descriptor + * - \ref libusb_device_handle + * - libusb_endpoint_descriptor + * - libusb_interface + * - libusb_interface_descriptor + * - libusb_iso_packet_descriptor + * - libusb_pollfd + * - libusb_ss_endpoint_companion_descriptor + * - libusb_ss_usb_device_capability_descriptor + * - libusb_transfer + * - libusb_usb_2_0_extension_descriptor + * - libusb_version + * + * \section Enums + * - \ref libusb_bos_type + * - \ref libusb_capability + * - \ref libusb_class_code + * - \ref libusb_descriptor_type + * - \ref libusb_endpoint_direction + * - \ref libusb_error + * - \ref libusb_iso_sync_type + * - \ref libusb_iso_usage_type + * - \ref libusb_log_level + * - \ref libusb_request_recipient + * - \ref libusb_request_type + * - \ref libusb_speed + * - \ref libusb_ss_usb_device_capability_attributes + * - \ref libusb_standard_request + * - \ref libusb_supported_speed + * - \ref libusb_transfer_flags + * - \ref libusb_transfer_status + * - \ref libusb_transfer_type + * - \ref libusb_usb_2_0_extension_attributes + */ + +/** + * @defgroup libusb_lib Library initialization/deinitialization + * This page details how to initialize and deinitialize libusb. Initialization + * must be performed before using any libusb functionality, and similarly you + * must not call any libusb functions after deinitialization. + */ + +/** + * @defgroup libusb_dev Device handling and enumeration + * The functionality documented below is designed to help with the following + * operations: + * - Enumerating the USB devices currently attached to the system + * - Choosing a device to operate from your software + * - Opening and closing the chosen device + * + * \section nutshell In a nutshell... + * + * The description below really makes things sound more complicated than they + * actually are. The following sequence of function calls will be suitable + * for almost all scenarios and does not require you to have such a deep + * understanding of the resource management issues: + * \code +// discover devices +libusb_device **list; +libusb_device *found = NULL; +ssize_t cnt = libusb_get_device_list(NULL, &list); +ssize_t i = 0; +int err = 0; +if (cnt < 0) + error(); + +for (i = 0; i < cnt; i++) { + libusb_device *device = list[i]; + if (is_interesting(device)) { + found = device; + break; + } +} + +if (found) { + libusb_device_handle *handle; + + err = libusb_open(found, &handle); + if (err) + error(); + // etc +} + +libusb_free_device_list(list, 1); +\endcode + * + * The two important points: + * - You asked libusb_free_device_list() to unreference the devices (2nd + * parameter) + * - You opened the device before freeing the list and unreferencing the + * devices + * + * If you ended up with a handle, you can now proceed to perform I/O on the + * device. + * + * \section devshandles Devices and device handles + * libusb has a concept of a USB device, represented by the + * \ref libusb_device opaque type. A device represents a USB device that + * is currently or was previously connected to the system. Using a reference + * to a device, you can determine certain information about the device (e.g. + * you can read the descriptor data). + * + * The libusb_get_device_list() function can be used to obtain a list of + * devices currently connected to the system. This is known as device + * discovery. + * + * Just because you have a reference to a device does not mean it is + * necessarily usable. The device may have been unplugged, you may not have + * permission to operate such device, or another program or driver may be + * using the device. + * + * When you've found a device that you'd like to operate, you must ask + * libusb to open the device using the libusb_open() function. Assuming + * success, libusb then returns you a device handle + * (a \ref libusb_device_handle pointer). All "real" I/O operations then + * operate on the handle rather than the original device pointer. + * + * \section devref Device discovery and reference counting + * + * Device discovery (i.e. calling libusb_get_device_list()) returns a + * freshly-allocated list of devices. The list itself must be freed when + * you are done with it. libusb also needs to know when it is OK to free + * the contents of the list - the devices themselves. + * + * To handle these issues, libusb provides you with two separate items: + * - A function to free the list itself + * - A reference counting system for the devices inside + * + * New devices presented by the libusb_get_device_list() function all have a + * reference count of 1. You can increase and decrease reference count using + * libusb_ref_device() and libusb_unref_device(). A device is destroyed when + * its reference count reaches 0. + * + * With the above information in mind, the process of opening a device can + * be viewed as follows: + * -# Discover devices using libusb_get_device_list(). + * -# Choose the device that you want to operate, and call libusb_open(). + * -# Unref all devices in the discovered device list. + * -# Free the discovered device list. + * + * The order is important - you must not unreference the device before + * attempting to open it, because unreferencing it may destroy the device. + * + * For convenience, the libusb_free_device_list() function includes a + * parameter to optionally unreference all the devices in the list before + * freeing the list itself. This combines steps 3 and 4 above. + * + * As an implementation detail, libusb_open() actually adds a reference to + * the device in question. This is because the device remains available + * through the handle via libusb_get_device(). The reference is deleted during + * libusb_close(). + */ + +/** @defgroup libusb_misc Miscellaneous */ + +/* we traverse usbfs without knowing how many devices we are going to find. + * so we create this discovered_devs model which is similar to a linked-list + * which grows when required. it can be freed once discovery has completed, + * eliminating the need for a list node in the libusb_device structure + * itself. */ +#define DISCOVERED_DEVICES_SIZE_STEP 8 + +static struct discovered_devs *discovered_devs_alloc(void) +{ + struct discovered_devs *ret = + malloc(sizeof(*ret) + (sizeof(void *) * DISCOVERED_DEVICES_SIZE_STEP)); + + if (ret) { + ret->len = 0; + ret->capacity = DISCOVERED_DEVICES_SIZE_STEP; + } + return ret; +} + +static void discovered_devs_free(struct discovered_devs *discdevs) +{ + size_t i; + + for (i = 0; i < discdevs->len; i++) + libusb_unref_device(discdevs->devices[i]); + + free(discdevs); +} + +/* append a device to the discovered devices collection. may realloc itself, + * returning new discdevs. returns NULL on realloc failure. */ +struct discovered_devs *discovered_devs_append( + struct discovered_devs *discdevs, struct libusb_device *dev) +{ + size_t len = discdevs->len; + size_t capacity; + struct discovered_devs *new_discdevs; + + /* if there is space, just append the device */ + if (len < discdevs->capacity) { + discdevs->devices[len] = libusb_ref_device(dev); + discdevs->len++; + return discdevs; + } + + /* exceeded capacity, need to grow */ + usbi_dbg("need to increase capacity"); + capacity = discdevs->capacity + DISCOVERED_DEVICES_SIZE_STEP; + /* can't use usbi_reallocf here because in failure cases it would + * free the existing discdevs without unreferencing its devices. */ + new_discdevs = realloc(discdevs, + sizeof(*discdevs) + (sizeof(void *) * capacity)); + if (!new_discdevs) { + discovered_devs_free(discdevs); + return NULL; + } + + discdevs = new_discdevs; + discdevs->capacity = capacity; + discdevs->devices[len] = libusb_ref_device(dev); + discdevs->len++; + + return discdevs; +} + +/* Allocate a new device with a specific session ID. The returned device has + * a reference count of 1. */ +struct libusb_device *usbi_alloc_device(struct libusb_context *ctx, + unsigned long session_id) +{ + size_t priv_size = usbi_backend->device_priv_size; + struct libusb_device *dev = calloc(1, sizeof(*dev) + priv_size); + int r; + + if (!dev) + return NULL; + + r = usbi_mutex_init(&dev->lock); + if (r) { + free(dev); + return NULL; + } + + dev->ctx = ctx; + dev->refcnt = 1; + dev->session_data = session_id; + dev->speed = LIBUSB_SPEED_UNKNOWN; + + if (!libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { + usbi_connect_device (dev); + } + + return dev; +} + +void usbi_connect_device(struct libusb_device *dev) +{ + struct libusb_context *ctx = DEVICE_CTX(dev); + + dev->attached = 1; + + usbi_mutex_lock(&dev->ctx->usb_devs_lock); + list_add(&dev->list, &dev->ctx->usb_devs); + usbi_mutex_unlock(&dev->ctx->usb_devs_lock); + + /* Signal that an event has occurred for this device if we support hotplug AND + * the hotplug message list is ready. This prevents an event from getting raised + * during initial enumeration. */ + if (libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG) && dev->ctx->hotplug_msgs.next) { + usbi_hotplug_notification(ctx, dev, LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED); + } +} + +void usbi_disconnect_device(struct libusb_device *dev) +{ + struct libusb_context *ctx = DEVICE_CTX(dev); + + usbi_mutex_lock(&dev->lock); + dev->attached = 0; + usbi_mutex_unlock(&dev->lock); + + usbi_mutex_lock(&ctx->usb_devs_lock); + list_del(&dev->list); + usbi_mutex_unlock(&ctx->usb_devs_lock); + + /* Signal that an event has occurred for this device if we support hotplug AND + * the hotplug message list is ready. This prevents an event from getting raised + * during initial enumeration. libusb_handle_events will take care of dereferencing + * the device. */ + if (libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG) && dev->ctx->hotplug_msgs.next) { + usbi_hotplug_notification(ctx, dev, LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT); + } +} + +/* Perform some final sanity checks on a newly discovered device. If this + * function fails (negative return code), the device should not be added + * to the discovered device list. */ +int usbi_sanitize_device(struct libusb_device *dev) +{ + int r; + uint8_t num_configurations; + + r = usbi_device_cache_descriptor(dev); + if (r < 0) + return r; + + num_configurations = dev->device_descriptor.bNumConfigurations; + if (num_configurations > USB_MAXCONFIG) { + usbi_err(DEVICE_CTX(dev), "too many configurations"); + return LIBUSB_ERROR_IO; + } else if (0 == num_configurations) + usbi_dbg("zero configurations, maybe an unauthorized device"); + + dev->num_configurations = num_configurations; + return 0; +} + +/* Examine libusb's internal list of known devices, looking for one with + * a specific session ID. Returns the matching device if it was found, and + * NULL otherwise. */ +struct libusb_device *usbi_get_device_by_session_id(struct libusb_context *ctx, + unsigned long session_id) +{ + struct libusb_device *dev; + struct libusb_device *ret = NULL; + + usbi_mutex_lock(&ctx->usb_devs_lock); + list_for_each_entry(dev, &ctx->usb_devs, list, struct libusb_device) + if (dev->session_data == session_id) { + ret = libusb_ref_device(dev); + break; + } + usbi_mutex_unlock(&ctx->usb_devs_lock); + + return ret; +} + +/** @ingroup libusb_dev + * Returns a list of USB devices currently attached to the system. This is + * your entry point into finding a USB device to operate. + * + * You are expected to unreference all the devices when you are done with + * them, and then free the list with libusb_free_device_list(). Note that + * libusb_free_device_list() can unref all the devices for you. Be careful + * not to unreference a device you are about to open until after you have + * opened it. + * + * This return value of this function indicates the number of devices in + * the resultant list. The list is actually one element larger, as it is + * NULL-terminated. + * + * \param ctx the context to operate on, or NULL for the default context + * \param list output location for a list of devices. Must be later freed with + * libusb_free_device_list(). + * \returns the number of devices in the outputted list, or any + * \ref libusb_error according to errors encountered by the backend. + */ +ssize_t API_EXPORTED libusb_get_device_list(libusb_context *ctx, + libusb_device ***list) +{ + struct discovered_devs *discdevs = discovered_devs_alloc(); + struct libusb_device **ret; + int r = 0; + ssize_t i, len; + USBI_GET_CONTEXT(ctx); + usbi_dbg(""); + + if (!discdevs) + return LIBUSB_ERROR_NO_MEM; + + if (libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { + /* backend provides hotplug support */ + struct libusb_device *dev; + + if (usbi_backend->hotplug_poll) + usbi_backend->hotplug_poll(); + + usbi_mutex_lock(&ctx->usb_devs_lock); + list_for_each_entry(dev, &ctx->usb_devs, list, struct libusb_device) { + discdevs = discovered_devs_append(discdevs, dev); + + if (!discdevs) { + r = LIBUSB_ERROR_NO_MEM; + break; + } + } + usbi_mutex_unlock(&ctx->usb_devs_lock); + } else { + /* backend does not provide hotplug support */ + r = usbi_backend->get_device_list(ctx, &discdevs); + } + + if (r < 0) { + len = r; + goto out; + } + + /* convert discovered_devs into a list */ + len = discdevs->len; + ret = calloc(len + 1, sizeof(struct libusb_device *)); + if (!ret) { + len = LIBUSB_ERROR_NO_MEM; + goto out; + } + + ret[len] = NULL; + for (i = 0; i < len; i++) { + struct libusb_device *dev = discdevs->devices[i]; + ret[i] = libusb_ref_device(dev); + } + *list = ret; + +out: + if (discdevs) + discovered_devs_free(discdevs); + return len; +} + +/** \ingroup libusb_dev + * Frees a list of devices previously discovered using + * libusb_get_device_list(). If the unref_devices parameter is set, the + * reference count of each device in the list is decremented by 1. + * \param list the list to free + * \param unref_devices whether to unref the devices in the list + */ +void API_EXPORTED libusb_free_device_list(libusb_device **list, + int unref_devices) +{ + if (!list) + return; + + if (unref_devices) { + int i = 0; + struct libusb_device *dev; + + while ((dev = list[i++]) != NULL) + libusb_unref_device(dev); + } + free(list); +} + +/** \ingroup libusb_dev + * Get the number of the bus that a device is connected to. + * \param dev a device + * \returns the bus number + */ +uint8_t API_EXPORTED libusb_get_bus_number(libusb_device *dev) +{ + return dev->bus_number; +} + +/** \ingroup libusb_dev + * Get the number of the port that a device is connected to. + * Unless the OS does something funky, or you are hot-plugging USB extension cards, + * the port number returned by this call is usually guaranteed to be uniquely tied + * to a physical port, meaning that different devices plugged on the same physical + * port should return the same port number. + * + * But outside of this, there is no guarantee that the port number returned by this + * call will remain the same, or even match the order in which ports have been + * numbered by the HUB/HCD manufacturer. + * + * \param dev a device + * \returns the port number (0 if not available) + */ +uint8_t API_EXPORTED libusb_get_port_number(libusb_device *dev) +{ + return dev->port_number; +} + +/** \ingroup libusb_dev + * Get the list of all port numbers from root for the specified device + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * \param dev a device + * \param port_numbers the array that should contain the port numbers + * \param port_numbers_len the maximum length of the array. As per the USB 3.0 + * specs, the current maximum limit for the depth is 7. + * \returns the number of elements filled + * \returns LIBUSB_ERROR_OVERFLOW if the array is too small + */ +int API_EXPORTED libusb_get_port_numbers(libusb_device *dev, + uint8_t* port_numbers, int port_numbers_len) +{ + int i = port_numbers_len; + struct libusb_context *ctx = DEVICE_CTX(dev); + + if (port_numbers_len <= 0) + return LIBUSB_ERROR_INVALID_PARAM; + + // HCDs can be listed as devices with port #0 + while((dev) && (dev->port_number != 0)) { + if (--i < 0) { + usbi_warn(ctx, "port numbers array is too small"); + return LIBUSB_ERROR_OVERFLOW; + } + port_numbers[i] = dev->port_number; + dev = dev->parent_dev; + } + if (i < port_numbers_len) + memmove(port_numbers, &port_numbers[i], port_numbers_len - i); + return port_numbers_len - i; +} + +/** \ingroup libusb_dev + * Deprecated please use libusb_get_port_numbers instead. + */ +int API_EXPORTED libusb_get_port_path(libusb_context *ctx, libusb_device *dev, + uint8_t* port_numbers, uint8_t port_numbers_len) +{ + UNUSED(ctx); + + return libusb_get_port_numbers(dev, port_numbers, port_numbers_len); +} + +/** \ingroup libusb_dev + * Get the the parent from the specified device. + * \param dev a device + * \returns the device parent or NULL if not available + * You should issue a \ref libusb_get_device_list() before calling this + * function and make sure that you only access the parent before issuing + * \ref libusb_free_device_list(). The reason is that libusb currently does + * not maintain a permanent list of device instances, and therefore can + * only guarantee that parents are fully instantiated within a + * libusb_get_device_list() - libusb_free_device_list() block. + */ +DEFAULT_VISIBILITY +libusb_device * LIBUSB_CALL libusb_get_parent(libusb_device *dev) +{ + return dev->parent_dev; +} + +/** \ingroup libusb_dev + * Get the address of the device on the bus it is connected to. + * \param dev a device + * \returns the device address + */ +uint8_t API_EXPORTED libusb_get_device_address(libusb_device *dev) +{ + return dev->device_address; +} + +/** \ingroup libusb_dev + * Get the negotiated connection speed for a device. + * \param dev a device + * \returns a \ref libusb_speed code, where LIBUSB_SPEED_UNKNOWN means that + * the OS doesn't know or doesn't support returning the negotiated speed. + */ +int API_EXPORTED libusb_get_device_speed(libusb_device *dev) +{ + return dev->speed; +} + +static const struct libusb_endpoint_descriptor *find_endpoint( + struct libusb_config_descriptor *config, unsigned char endpoint) +{ + int iface_idx; + for (iface_idx = 0; iface_idx < config->bNumInterfaces; iface_idx++) { + const struct libusb_interface *iface = &config->interface[iface_idx]; + int altsetting_idx; + + for (altsetting_idx = 0; altsetting_idx < iface->num_altsetting; + altsetting_idx++) { + const struct libusb_interface_descriptor *altsetting + = &iface->altsetting[altsetting_idx]; + int ep_idx; + + for (ep_idx = 0; ep_idx < altsetting->bNumEndpoints; ep_idx++) { + const struct libusb_endpoint_descriptor *ep = + &altsetting->endpoint[ep_idx]; + if (ep->bEndpointAddress == endpoint) + return ep; + } + } + } + return NULL; +} + +/** \ingroup libusb_dev + * Convenience function to retrieve the wMaxPacketSize value for a particular + * endpoint in the active device configuration. + * + * This function was originally intended to be of assistance when setting up + * isochronous transfers, but a design mistake resulted in this function + * instead. It simply returns the wMaxPacketSize value without considering + * its contents. If you're dealing with isochronous transfers, you probably + * want libusb_get_max_iso_packet_size() instead. + * + * \param dev a device + * \param endpoint address of the endpoint in question + * \returns the wMaxPacketSize value + * \returns LIBUSB_ERROR_NOT_FOUND if the endpoint does not exist + * \returns LIBUSB_ERROR_OTHER on other failure + */ +int API_EXPORTED libusb_get_max_packet_size(libusb_device *dev, + unsigned char endpoint) +{ + struct libusb_config_descriptor *config; + const struct libusb_endpoint_descriptor *ep; + int r; + + r = libusb_get_active_config_descriptor(dev, &config); + if (r < 0) { + usbi_err(DEVICE_CTX(dev), + "could not retrieve active config descriptor"); + return LIBUSB_ERROR_OTHER; + } + + ep = find_endpoint(config, endpoint); + if (!ep) { + r = LIBUSB_ERROR_NOT_FOUND; + goto out; + } + + r = ep->wMaxPacketSize; + +out: + libusb_free_config_descriptor(config); + return r; +} + +/** \ingroup libusb_dev + * Calculate the maximum packet size which a specific endpoint is capable is + * sending or receiving in the duration of 1 microframe + * + * Only the active configuration is examined. The calculation is based on the + * wMaxPacketSize field in the endpoint descriptor as described in section + * 9.6.6 in the USB 2.0 specifications. + * + * If acting on an isochronous or interrupt endpoint, this function will + * multiply the value found in bits 0:10 by the number of transactions per + * microframe (determined by bits 11:12). Otherwise, this function just + * returns the numeric value found in bits 0:10. + * + * This function is useful for setting up isochronous transfers, for example + * you might pass the return value from this function to + * libusb_set_iso_packet_lengths() in order to set the length field of every + * isochronous packet in a transfer. + * + * Since v1.0.3. + * + * \param dev a device + * \param endpoint address of the endpoint in question + * \returns the maximum packet size which can be sent/received on this endpoint + * \returns LIBUSB_ERROR_NOT_FOUND if the endpoint does not exist + * \returns LIBUSB_ERROR_OTHER on other failure + */ +int API_EXPORTED libusb_get_max_iso_packet_size(libusb_device *dev, + unsigned char endpoint) +{ + struct libusb_config_descriptor *config; + const struct libusb_endpoint_descriptor *ep; + enum libusb_transfer_type ep_type; + uint16_t val; + int r; + + r = libusb_get_active_config_descriptor(dev, &config); + if (r < 0) { + usbi_err(DEVICE_CTX(dev), + "could not retrieve active config descriptor"); + return LIBUSB_ERROR_OTHER; + } + + ep = find_endpoint(config, endpoint); + if (!ep) { + r = LIBUSB_ERROR_NOT_FOUND; + goto out; + } + + val = ep->wMaxPacketSize; + ep_type = (enum libusb_transfer_type) (ep->bmAttributes & 0x3); + + r = val & 0x07ff; + if (ep_type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS + || ep_type == LIBUSB_TRANSFER_TYPE_INTERRUPT) + r *= (1 + ((val >> 11) & 3)); + +out: + libusb_free_config_descriptor(config); + return r; +} + +/** \ingroup libusb_dev + * Increment the reference count of a device. + * \param dev the device to reference + * \returns the same device + */ +DEFAULT_VISIBILITY +libusb_device * LIBUSB_CALL libusb_ref_device(libusb_device *dev) +{ + usbi_mutex_lock(&dev->lock); + dev->refcnt++; + usbi_mutex_unlock(&dev->lock); + return dev; +} + +/** \ingroup libusb_dev + * Decrement the reference count of a device. If the decrement operation + * causes the reference count to reach zero, the device shall be destroyed. + * \param dev the device to unreference + */ +void API_EXPORTED libusb_unref_device(libusb_device *dev) +{ + int refcnt; + + if (!dev) + return; + + usbi_mutex_lock(&dev->lock); + refcnt = --dev->refcnt; + usbi_mutex_unlock(&dev->lock); + + if (refcnt == 0) { + usbi_dbg("destroy device %d.%d", dev->bus_number, dev->device_address); + + libusb_unref_device(dev->parent_dev); + + if (usbi_backend->destroy_device) + usbi_backend->destroy_device(dev); + + if (!libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { + /* backend does not support hotplug */ + usbi_disconnect_device(dev); + } + + usbi_mutex_destroy(&dev->lock); + free(dev); + } +} + +/* + * Signal the event pipe so that the event handling thread will be + * interrupted to process an internal event. + */ +int usbi_signal_event(struct libusb_context *ctx) +{ + unsigned char dummy = 1; + ssize_t r; + + /* write some data on event pipe to interrupt event handlers */ + r = usbi_write(ctx->event_pipe[1], &dummy, sizeof(dummy)); + if (r != sizeof(dummy)) { + usbi_warn(ctx, "internal signalling write failed"); + return LIBUSB_ERROR_IO; + } + + return 0; +} + +/* + * Clear the event pipe so that the event handling will no longer be + * interrupted. + */ +int usbi_clear_event(struct libusb_context *ctx) +{ + unsigned char dummy; + ssize_t r; + + /* read some data on event pipe to clear it */ + r = usbi_read(ctx->event_pipe[0], &dummy, sizeof(dummy)); + if (r != sizeof(dummy)) { + usbi_warn(ctx, "internal signalling read failed"); + return LIBUSB_ERROR_IO; + } + + return 0; +} + +/** \ingroup libusb_dev + * Open a device and obtain a device handle. A handle allows you to perform + * I/O on the device in question. + * + * Internally, this function adds a reference to the device and makes it + * available to you through libusb_get_device(). This reference is removed + * during libusb_close(). + * + * This is a non-blocking function; no requests are sent over the bus. + * + * \param dev the device to open + * \param dev_handle output location for the returned device handle pointer. Only + * populated when the return code is 0. + * \returns 0 on success + * \returns LIBUSB_ERROR_NO_MEM on memory allocation failure + * \returns LIBUSB_ERROR_ACCESS if the user has insufficient permissions + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns another LIBUSB_ERROR code on other failure + */ +int API_EXPORTED libusb_open(libusb_device *dev, + libusb_device_handle **dev_handle) +{ + struct libusb_context *ctx = DEVICE_CTX(dev); + struct libusb_device_handle *_dev_handle; + size_t priv_size = usbi_backend->device_handle_priv_size; + int r; + usbi_dbg("open %d.%d", dev->bus_number, dev->device_address); + + if (!dev->attached) { + return LIBUSB_ERROR_NO_DEVICE; + } + + _dev_handle = malloc(sizeof(*_dev_handle) + priv_size); + if (!_dev_handle) + return LIBUSB_ERROR_NO_MEM; + + r = usbi_mutex_init(&_dev_handle->lock); + if (r) { + free(_dev_handle); + return LIBUSB_ERROR_OTHER; + } + + _dev_handle->dev = libusb_ref_device(dev); + _dev_handle->auto_detach_kernel_driver = 0; + _dev_handle->claimed_interfaces = 0; + memset(&_dev_handle->os_priv, 0, priv_size); + + r = usbi_backend->open(_dev_handle); + if (r < 0) { + usbi_dbg("open %d.%d returns %d", dev->bus_number, dev->device_address, r); + libusb_unref_device(dev); + usbi_mutex_destroy(&_dev_handle->lock); + free(_dev_handle); + return r; + } + + usbi_mutex_lock(&ctx->open_devs_lock); + list_add(&_dev_handle->list, &ctx->open_devs); + usbi_mutex_unlock(&ctx->open_devs_lock); + *dev_handle = _dev_handle; + + return 0; +} + +/** \ingroup libusb_dev + * Convenience function for finding a device with a particular + * idVendor/idProduct combination. This function is intended + * for those scenarios where you are using libusb to knock up a quick test + * application - it allows you to avoid calling libusb_get_device_list() and + * worrying about traversing/freeing the list. + * + * This function has limitations and is hence not intended for use in real + * applications: if multiple devices have the same IDs it will only + * give you the first one, etc. + * + * \param ctx the context to operate on, or NULL for the default context + * \param vendor_id the idVendor value to search for + * \param product_id the idProduct value to search for + * \returns a device handle for the first found device, or NULL on error + * or if the device could not be found. */ +DEFAULT_VISIBILITY +libusb_device_handle * LIBUSB_CALL libusb_open_device_with_vid_pid( + libusb_context *ctx, uint16_t vendor_id, uint16_t product_id) +{ + struct libusb_device **devs; + struct libusb_device *found = NULL; + struct libusb_device *dev; + struct libusb_device_handle *dev_handle = NULL; + size_t i = 0; + int r; + + if (libusb_get_device_list(ctx, &devs) < 0) + return NULL; + + while ((dev = devs[i++]) != NULL) { + struct libusb_device_descriptor desc; + r = libusb_get_device_descriptor(dev, &desc); + if (r < 0) + goto out; + if (desc.idVendor == vendor_id && desc.idProduct == product_id) { + found = dev; + break; + } + } + + if (found) { + r = libusb_open(found, &dev_handle); + if (r < 0) + dev_handle = NULL; + } + +out: + libusb_free_device_list(devs, 1); + return dev_handle; +} + +static void do_close(struct libusb_context *ctx, + struct libusb_device_handle *dev_handle) +{ + struct usbi_transfer *itransfer; + struct usbi_transfer *tmp; + + /* remove any transfers in flight that are for this device */ + usbi_mutex_lock(&ctx->flying_transfers_lock); + + /* safe iteration because transfers may be being deleted */ + list_for_each_entry_safe(itransfer, tmp, &ctx->flying_transfers, list, struct usbi_transfer) { + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + if (transfer->dev_handle != dev_handle) + continue; + + usbi_mutex_lock(&itransfer->lock); + if (!(itransfer->state_flags & USBI_TRANSFER_DEVICE_DISAPPEARED)) { + usbi_err(ctx, "Device handle closed while transfer was still being processed, but the device is still connected as far as we know"); + + if (itransfer->state_flags & USBI_TRANSFER_CANCELLING) + usbi_warn(ctx, "A cancellation for an in-flight transfer hasn't completed but closing the device handle"); + else + usbi_err(ctx, "A cancellation hasn't even been scheduled on the transfer for which the device is closing"); + } + usbi_mutex_unlock(&itransfer->lock); + + /* remove from the list of in-flight transfers and make sure + * we don't accidentally use the device handle in the future + * (or that such accesses will be easily caught and identified as a crash) + */ + list_del(&itransfer->list); + transfer->dev_handle = NULL; + + /* it is up to the user to free up the actual transfer struct. this is + * just making sure that we don't attempt to process the transfer after + * the device handle is invalid + */ + usbi_dbg("Removed transfer %p from the in-flight list because device handle %p closed", + transfer, dev_handle); + } + usbi_mutex_unlock(&ctx->flying_transfers_lock); + + usbi_mutex_lock(&ctx->open_devs_lock); + list_del(&dev_handle->list); + usbi_mutex_unlock(&ctx->open_devs_lock); + + usbi_backend->close(dev_handle); + libusb_unref_device(dev_handle->dev); + usbi_mutex_destroy(&dev_handle->lock); + free(dev_handle); +} + +/** \ingroup libusb_dev + * Close a device handle. Should be called on all open handles before your + * application exits. + * + * Internally, this function destroys the reference that was added by + * libusb_open() on the given device. + * + * This is a non-blocking function; no requests are sent over the bus. + * + * \param dev_handle the device handle to close + */ +void API_EXPORTED libusb_close(libusb_device_handle *dev_handle) +{ + struct libusb_context *ctx; + int handling_events; + int pending_events; + + if (!dev_handle) + return; + usbi_dbg(""); + + ctx = HANDLE_CTX(dev_handle); + handling_events = usbi_handling_events(ctx); + + /* Similarly to libusb_open(), we want to interrupt all event handlers + * at this point. More importantly, we want to perform the actual close of + * the device while holding the event handling lock (preventing any other + * thread from doing event handling) because we will be removing a file + * descriptor from the polling loop. If this is being called by the current + * event handler, we can bypass the interruption code because we already + * hold the event handling lock. */ + + if (!handling_events) { + /* Record that we are closing a device. + * Only signal an event if there are no prior pending events. */ + usbi_mutex_lock(&ctx->event_data_lock); + pending_events = usbi_pending_events(ctx); + ctx->device_close++; + if (!pending_events) + usbi_signal_event(ctx); + usbi_mutex_unlock(&ctx->event_data_lock); + + /* take event handling lock */ + libusb_lock_events(ctx); + } + + /* Close the device */ + do_close(ctx, dev_handle); + + if (!handling_events) { + /* We're done with closing this device. + * Clear the event pipe if there are no further pending events. */ + usbi_mutex_lock(&ctx->event_data_lock); + ctx->device_close--; + pending_events = usbi_pending_events(ctx); + if (!pending_events) + usbi_clear_event(ctx); + usbi_mutex_unlock(&ctx->event_data_lock); + + /* Release event handling lock and wake up event waiters */ + libusb_unlock_events(ctx); + } +} + +/** \ingroup libusb_dev + * Get the underlying device for a device handle. This function does not modify + * the reference count of the returned device, so do not feel compelled to + * unreference it when you are done. + * \param dev_handle a device handle + * \returns the underlying device + */ +DEFAULT_VISIBILITY +libusb_device * LIBUSB_CALL libusb_get_device(libusb_device_handle *dev_handle) +{ + return dev_handle->dev; +} + +/** \ingroup libusb_dev + * Determine the bConfigurationValue of the currently active configuration. + * + * You could formulate your own control request to obtain this information, + * but this function has the advantage that it may be able to retrieve the + * information from operating system caches (no I/O involved). + * + * If the OS does not cache this information, then this function will block + * while a control transfer is submitted to retrieve the information. + * + * This function will return a value of 0 in the config output + * parameter if the device is in unconfigured state. + * + * \param dev_handle a device handle + * \param config output location for the bConfigurationValue of the active + * configuration (only valid for return code 0) + * \returns 0 on success + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns another LIBUSB_ERROR code on other failure + */ +int API_EXPORTED libusb_get_configuration(libusb_device_handle *dev_handle, + int *config) +{ + int r = LIBUSB_ERROR_NOT_SUPPORTED; + + usbi_dbg(""); + if (usbi_backend->get_configuration) + r = usbi_backend->get_configuration(dev_handle, config); + + if (r == LIBUSB_ERROR_NOT_SUPPORTED) { + uint8_t tmp = 0; + usbi_dbg("falling back to control message"); + r = libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_IN, + LIBUSB_REQUEST_GET_CONFIGURATION, 0, 0, &tmp, 1, 1000); + if (r == 0) { + usbi_err(HANDLE_CTX(dev_handle), "zero bytes returned in ctrl transfer?"); + r = LIBUSB_ERROR_IO; + } else if (r == 1) { + r = 0; + *config = tmp; + } else { + usbi_dbg("control failed, error %d", r); + } + } + + if (r == 0) + usbi_dbg("active config %d", *config); + + return r; +} + +/** \ingroup libusb_dev + * Set the active configuration for a device. + * + * The operating system may or may not have already set an active + * configuration on the device. It is up to your application to ensure the + * correct configuration is selected before you attempt to claim interfaces + * and perform other operations. + * + * If you call this function on a device already configured with the selected + * configuration, then this function will act as a lightweight device reset: + * it will issue a SET_CONFIGURATION request using the current configuration, + * causing most USB-related device state to be reset (altsetting reset to zero, + * endpoint halts cleared, toggles reset). + * + * You cannot change/reset configuration if your application has claimed + * interfaces. It is advised to set the desired configuration before claiming + * interfaces. + * + * Alternatively you can call libusb_release_interface() first. Note if you + * do things this way you must ensure that auto_detach_kernel_driver for + * dev is 0, otherwise the kernel driver will be re-attached when you + * release the interface(s). + * + * You cannot change/reset configuration if other applications or drivers have + * claimed interfaces. + * + * A configuration value of -1 will put the device in unconfigured state. + * The USB specifications state that a configuration value of 0 does this, + * however buggy devices exist which actually have a configuration 0. + * + * You should always use this function rather than formulating your own + * SET_CONFIGURATION control request. This is because the underlying operating + * system needs to know when such changes happen. + * + * This is a blocking function. + * + * \param dev_handle a device handle + * \param configuration the bConfigurationValue of the configuration you + * wish to activate, or -1 if you wish to put the device in an unconfigured + * state + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the requested configuration does not exist + * \returns LIBUSB_ERROR_BUSY if interfaces are currently claimed + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns another LIBUSB_ERROR code on other failure + * \see libusb_set_auto_detach_kernel_driver() + */ +int API_EXPORTED libusb_set_configuration(libusb_device_handle *dev_handle, + int configuration) +{ + usbi_dbg("configuration %d", configuration); + return usbi_backend->set_configuration(dev_handle, configuration); +} + +/** \ingroup libusb_dev + * Claim an interface on a given device handle. You must claim the interface + * you wish to use before you can perform I/O on any of its endpoints. + * + * It is legal to attempt to claim an already-claimed interface, in which + * case libusb just returns 0 without doing anything. + * + * If auto_detach_kernel_driver is set to 1 for dev, the kernel driver + * will be detached if necessary, on failure the detach error is returned. + * + * Claiming of interfaces is a purely logical operation; it does not cause + * any requests to be sent over the bus. Interface claiming is used to + * instruct the underlying operating system that your application wishes + * to take ownership of the interface. + * + * This is a non-blocking function. + * + * \param dev_handle a device handle + * \param interface_number the bInterfaceNumber of the interface you + * wish to claim + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the requested interface does not exist + * \returns LIBUSB_ERROR_BUSY if another program or driver has claimed the + * interface + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns a LIBUSB_ERROR code on other failure + * \see libusb_set_auto_detach_kernel_driver() + */ +int API_EXPORTED libusb_claim_interface(libusb_device_handle *dev_handle, + int interface_number) +{ + int r = 0; + + usbi_dbg("interface %d", interface_number); + if (interface_number >= USB_MAXINTERFACES) + return LIBUSB_ERROR_INVALID_PARAM; + + if (!dev_handle->dev->attached) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_mutex_lock(&dev_handle->lock); + if (dev_handle->claimed_interfaces & (1 << interface_number)) + goto out; + + r = usbi_backend->claim_interface(dev_handle, interface_number); + if (r == 0) + dev_handle->claimed_interfaces |= 1 << interface_number; + +out: + usbi_mutex_unlock(&dev_handle->lock); + return r; +} + +/** \ingroup libusb_dev + * Release an interface previously claimed with libusb_claim_interface(). You + * should release all claimed interfaces before closing a device handle. + * + * This is a blocking function. A SET_INTERFACE control request will be sent + * to the device, resetting interface state to the first alternate setting. + * + * If auto_detach_kernel_driver is set to 1 for dev, the kernel + * driver will be re-attached after releasing the interface. + * + * \param dev_handle a device handle + * \param interface_number the bInterfaceNumber of the + * previously-claimed interface + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the interface was not claimed + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns another LIBUSB_ERROR code on other failure + * \see libusb_set_auto_detach_kernel_driver() + */ +int API_EXPORTED libusb_release_interface(libusb_device_handle *dev_handle, + int interface_number) +{ + int r; + + usbi_dbg("interface %d", interface_number); + if (interface_number >= USB_MAXINTERFACES) + return LIBUSB_ERROR_INVALID_PARAM; + + usbi_mutex_lock(&dev_handle->lock); + if (!(dev_handle->claimed_interfaces & (1 << interface_number))) { + r = LIBUSB_ERROR_NOT_FOUND; + goto out; + } + + r = usbi_backend->release_interface(dev_handle, interface_number); + if (r == 0) + dev_handle->claimed_interfaces &= ~(1 << interface_number); + +out: + usbi_mutex_unlock(&dev_handle->lock); + return r; +} + +/** \ingroup libusb_dev + * Activate an alternate setting for an interface. The interface must have + * been previously claimed with libusb_claim_interface(). + * + * You should always use this function rather than formulating your own + * SET_INTERFACE control request. This is because the underlying operating + * system needs to know when such changes happen. + * + * This is a blocking function. + * + * \param dev_handle a device handle + * \param interface_number the bInterfaceNumber of the + * previously-claimed interface + * \param alternate_setting the bAlternateSetting of the alternate + * setting to activate + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the interface was not claimed, or the + * requested alternate setting does not exist + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns another LIBUSB_ERROR code on other failure + */ +int API_EXPORTED libusb_set_interface_alt_setting(libusb_device_handle *dev_handle, + int interface_number, int alternate_setting) +{ + usbi_dbg("interface %d altsetting %d", + interface_number, alternate_setting); + if (interface_number >= USB_MAXINTERFACES) + return LIBUSB_ERROR_INVALID_PARAM; + + usbi_mutex_lock(&dev_handle->lock); + if (!dev_handle->dev->attached) { + usbi_mutex_unlock(&dev_handle->lock); + return LIBUSB_ERROR_NO_DEVICE; + } + + if (!(dev_handle->claimed_interfaces & (1 << interface_number))) { + usbi_mutex_unlock(&dev_handle->lock); + return LIBUSB_ERROR_NOT_FOUND; + } + usbi_mutex_unlock(&dev_handle->lock); + + return usbi_backend->set_interface_altsetting(dev_handle, interface_number, + alternate_setting); +} + +/** \ingroup libusb_dev + * Clear the halt/stall condition for an endpoint. Endpoints with halt status + * are unable to receive or transmit data until the halt condition is stalled. + * + * You should cancel all pending transfers before attempting to clear the halt + * condition. + * + * This is a blocking function. + * + * \param dev_handle a device handle + * \param endpoint the endpoint to clear halt status + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the endpoint does not exist + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns another LIBUSB_ERROR code on other failure + */ +int API_EXPORTED libusb_clear_halt(libusb_device_handle *dev_handle, + unsigned char endpoint) +{ + usbi_dbg("endpoint %x", endpoint); + if (!dev_handle->dev->attached) + return LIBUSB_ERROR_NO_DEVICE; + + return usbi_backend->clear_halt(dev_handle, endpoint); +} + +/** \ingroup libusb_dev + * Perform a USB port reset to reinitialize a device. The system will attempt + * to restore the previous configuration and alternate settings after the + * reset has completed. + * + * If the reset fails, the descriptors change, or the previous state cannot be + * restored, the device will appear to be disconnected and reconnected. This + * means that the device handle is no longer valid (you should close it) and + * rediscover the device. A return code of LIBUSB_ERROR_NOT_FOUND indicates + * when this is the case. + * + * This is a blocking function which usually incurs a noticeable delay. + * + * \param dev_handle a handle of the device to reset + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if re-enumeration is required, or if the + * device has been disconnected + * \returns another LIBUSB_ERROR code on other failure + */ +int API_EXPORTED libusb_reset_device(libusb_device_handle *dev_handle) +{ + usbi_dbg(""); + if (!dev_handle->dev->attached) + return LIBUSB_ERROR_NO_DEVICE; + + return usbi_backend->reset_device(dev_handle); +} + +/** \ingroup libusb_asyncio + * Allocate up to num_streams usb bulk streams on the specified endpoints. This + * function takes an array of endpoints rather then a single endpoint because + * some protocols require that endpoints are setup with similar stream ids. + * All endpoints passed in must belong to the same interface. + * + * Note this function may return less streams then requested. Also note that the + * same number of streams are allocated for each endpoint in the endpoint array. + * + * Stream id 0 is reserved, and should not be used to communicate with devices. + * If libusb_alloc_streams() returns with a value of N, you may use stream ids + * 1 to N. + * + * Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103 + * + * \param dev_handle a device handle + * \param num_streams number of streams to try to allocate + * \param endpoints array of endpoints to allocate streams on + * \param num_endpoints length of the endpoints array + * \returns number of streams allocated, or a LIBUSB_ERROR code on failure + */ +int API_EXPORTED libusb_alloc_streams(libusb_device_handle *dev_handle, + uint32_t num_streams, unsigned char *endpoints, int num_endpoints) +{ + usbi_dbg("streams %u eps %d", (unsigned) num_streams, num_endpoints); + + if (!dev_handle->dev->attached) + return LIBUSB_ERROR_NO_DEVICE; + + if (usbi_backend->alloc_streams) + return usbi_backend->alloc_streams(dev_handle, num_streams, endpoints, + num_endpoints); + else + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +/** \ingroup libusb_asyncio + * Free usb bulk streams allocated with libusb_alloc_streams(). + * + * Note streams are automatically free-ed when releasing an interface. + * + * Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103 + * + * \param dev_handle a device handle + * \param endpoints array of endpoints to free streams on + * \param num_endpoints length of the endpoints array + * \returns LIBUSB_SUCCESS, or a LIBUSB_ERROR code on failure + */ +int API_EXPORTED libusb_free_streams(libusb_device_handle *dev_handle, + unsigned char *endpoints, int num_endpoints) +{ + usbi_dbg("eps %d", num_endpoints); + + if (!dev_handle->dev->attached) + return LIBUSB_ERROR_NO_DEVICE; + + if (usbi_backend->free_streams) + return usbi_backend->free_streams(dev_handle, endpoints, + num_endpoints); + else + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +/** \ingroup libusb_asyncio + * Attempts to allocate a block of persistent DMA memory suitable for transfers + * against the given device. If successful, will return a block of memory + * that is suitable for use as "buffer" in \ref libusb_transfer against this + * device. Using this memory instead of regular memory means that the host + * controller can use DMA directly into the buffer to increase performance, and + * also that transfers can no longer fail due to kernel memory fragmentation. + * + * Note that this means you should not modify this memory (or even data on + * the same cache lines) when a transfer is in progress, although it is legal + * to have several transfers going on within the same memory block. + * + * Will return NULL on failure. Many systems do not support such zerocopy + * and will always return NULL. Memory allocated with this function must be + * freed with \ref libusb_dev_mem_free. Specifically, this means that the + * flag \ref LIBUSB_TRANSFER_FREE_BUFFER cannot be used to free memory allocated + * with this function. + * + * Since version 1.0.21, \ref LIBUSB_API_VERSION >= 0x01000105 + * + * \param dev_handle a device handle + * \param length size of desired data buffer + * \returns a pointer to the newly allocated memory, or NULL on failure + */ +DEFAULT_VISIBILITY +unsigned char * LIBUSB_CALL libusb_dev_mem_alloc(libusb_device_handle *dev_handle, + size_t length) +{ + if (!dev_handle->dev->attached) + return NULL; + + if (usbi_backend->dev_mem_alloc) + return usbi_backend->dev_mem_alloc(dev_handle, length); + else + return NULL; +} + +/** \ingroup libusb_asyncio + * Free device memory allocated with libusb_dev_mem_alloc(). + * + * \param dev_handle a device handle + * \param buffer pointer to the previously allocated memory + * \param length size of previously allocated memory + * \returns LIBUSB_SUCCESS, or a LIBUSB_ERROR code on failure + */ +int API_EXPORTED libusb_dev_mem_free(libusb_device_handle *dev_handle, + unsigned char *buffer, size_t length) +{ + if (usbi_backend->dev_mem_free) + return usbi_backend->dev_mem_free(dev_handle, buffer, length); + else + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +/** \ingroup libusb_dev + * Determine if a kernel driver is active on an interface. If a kernel driver + * is active, you cannot claim the interface, and libusb will be unable to + * perform I/O. + * + * This functionality is not available on Windows. + * + * \param dev_handle a device handle + * \param interface_number the interface to check + * \returns 0 if no kernel driver is active + * \returns 1 if a kernel driver is active + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns LIBUSB_ERROR_NOT_SUPPORTED on platforms where the functionality + * is not available + * \returns another LIBUSB_ERROR code on other failure + * \see libusb_detach_kernel_driver() + */ +int API_EXPORTED libusb_kernel_driver_active(libusb_device_handle *dev_handle, + int interface_number) +{ + usbi_dbg("interface %d", interface_number); + + if (!dev_handle->dev->attached) + return LIBUSB_ERROR_NO_DEVICE; + + if (usbi_backend->kernel_driver_active) + return usbi_backend->kernel_driver_active(dev_handle, interface_number); + else + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +/** \ingroup libusb_dev + * Detach a kernel driver from an interface. If successful, you will then be + * able to claim the interface and perform I/O. + * + * This functionality is not available on Darwin or Windows. + * + * Note that libusb itself also talks to the device through a special kernel + * driver, if this driver is already attached to the device, this call will + * not detach it and return LIBUSB_ERROR_NOT_FOUND. + * + * \param dev_handle a device handle + * \param interface_number the interface to detach the driver from + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if no kernel driver was active + * \returns LIBUSB_ERROR_INVALID_PARAM if the interface does not exist + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns LIBUSB_ERROR_NOT_SUPPORTED on platforms where the functionality + * is not available + * \returns another LIBUSB_ERROR code on other failure + * \see libusb_kernel_driver_active() + */ +int API_EXPORTED libusb_detach_kernel_driver(libusb_device_handle *dev_handle, + int interface_number) +{ + usbi_dbg("interface %d", interface_number); + + if (!dev_handle->dev->attached) + return LIBUSB_ERROR_NO_DEVICE; + + if (usbi_backend->detach_kernel_driver) + return usbi_backend->detach_kernel_driver(dev_handle, interface_number); + else + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +/** \ingroup libusb_dev + * Re-attach an interface's kernel driver, which was previously detached + * using libusb_detach_kernel_driver(). This call is only effective on + * Linux and returns LIBUSB_ERROR_NOT_SUPPORTED on all other platforms. + * + * This functionality is not available on Darwin or Windows. + * + * \param dev_handle a device handle + * \param interface_number the interface to attach the driver from + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if no kernel driver was active + * \returns LIBUSB_ERROR_INVALID_PARAM if the interface does not exist + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns LIBUSB_ERROR_NOT_SUPPORTED on platforms where the functionality + * is not available + * \returns LIBUSB_ERROR_BUSY if the driver cannot be attached because the + * interface is claimed by a program or driver + * \returns another LIBUSB_ERROR code on other failure + * \see libusb_kernel_driver_active() + */ +int API_EXPORTED libusb_attach_kernel_driver(libusb_device_handle *dev_handle, + int interface_number) +{ + usbi_dbg("interface %d", interface_number); + + if (!dev_handle->dev->attached) + return LIBUSB_ERROR_NO_DEVICE; + + if (usbi_backend->attach_kernel_driver) + return usbi_backend->attach_kernel_driver(dev_handle, interface_number); + else + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +/** \ingroup libusb_dev + * Enable/disable libusb's automatic kernel driver detachment. When this is + * enabled libusb will automatically detach the kernel driver on an interface + * when claiming the interface, and attach it when releasing the interface. + * + * Automatic kernel driver detachment is disabled on newly opened device + * handles by default. + * + * On platforms which do not have LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER + * this function will return LIBUSB_ERROR_NOT_SUPPORTED, and libusb will + * continue as if this function was never called. + * + * \param dev_handle a device handle + * \param enable whether to enable or disable auto kernel driver detachment + * + * \returns LIBUSB_SUCCESS on success + * \returns LIBUSB_ERROR_NOT_SUPPORTED on platforms where the functionality + * is not available + * \see libusb_claim_interface() + * \see libusb_release_interface() + * \see libusb_set_configuration() + */ +int API_EXPORTED libusb_set_auto_detach_kernel_driver( + libusb_device_handle *dev_handle, int enable) +{ + if (!(usbi_backend->caps & USBI_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) + return LIBUSB_ERROR_NOT_SUPPORTED; + + dev_handle->auto_detach_kernel_driver = enable; + return LIBUSB_SUCCESS; +} + +/** \ingroup libusb_lib + * Set log message verbosity. + * + * The default level is LIBUSB_LOG_LEVEL_NONE, which means no messages are ever + * printed. If you choose to increase the message verbosity level, ensure + * that your application does not close the stdout/stderr file descriptors. + * + * You are advised to use level LIBUSB_LOG_LEVEL_WARNING. libusb is conservative + * with its message logging and most of the time, will only log messages that + * explain error conditions and other oddities. This will help you debug + * your software. + * + * If the LIBUSB_DEBUG environment variable was set when libusb was + * initialized, this function does nothing: the message verbosity is fixed + * to the value in the environment variable. + * + * If libusb was compiled without any message logging, this function does + * nothing: you'll never get any messages. + * + * If libusb was compiled with verbose debug message logging, this function + * does nothing: you'll always get messages from all levels. + * + * \param ctx the context to operate on, or NULL for the default context + * \param level debug level to set + */ +void API_EXPORTED libusb_set_debug(libusb_context *ctx, int level) +{ + USBI_GET_CONTEXT(ctx); + if (!ctx->debug_fixed) + ctx->debug = level; +} + +/** \ingroup libusb_lib + * Initialize libusb. This function must be called before calling any other + * libusb function. + * + * If you do not provide an output location for a context pointer, a default + * context will be created. If there was already a default context, it will + * be reused (and nothing will be initialized/reinitialized). + * + * \param context Optional output location for context pointer. + * Only valid on return code 0. + * \returns 0 on success, or a LIBUSB_ERROR code on failure + * \see libusb_contexts + */ +int API_EXPORTED libusb_init(libusb_context **context) +{ + struct libusb_device *dev, *next; + char *dbg = getenv("LIBUSB_DEBUG"); + struct libusb_context *ctx; + static int first_init = 1; + int r = 0; + + usbi_mutex_static_lock(&default_context_lock); + + if (!timestamp_origin.tv_sec) { + usbi_backend->clock_gettime(USBI_CLOCK_REALTIME, ×tamp_origin); + } + + if (!context && usbi_default_context) { + usbi_dbg("reusing default context"); + default_context_refcnt++; + usbi_mutex_static_unlock(&default_context_lock); + return 0; + } + + ctx = calloc(1, sizeof(*ctx)); + if (!ctx) { + r = LIBUSB_ERROR_NO_MEM; + goto err_unlock; + } + +#ifdef ENABLE_DEBUG_LOGGING + ctx->debug = LIBUSB_LOG_LEVEL_DEBUG; +#endif + + if (dbg) { + ctx->debug = atoi(dbg); + if (ctx->debug) + ctx->debug_fixed = 1; + } + + /* default context should be initialized before calling usbi_dbg */ + if (!usbi_default_context) { + usbi_default_context = ctx; + default_context_refcnt++; + usbi_dbg("created default context"); + } + + usbi_dbg("libusb v%u.%u.%u.%u%s", libusb_version_internal.major, libusb_version_internal.minor, + libusb_version_internal.micro, libusb_version_internal.nano, libusb_version_internal.rc); + + usbi_mutex_init(&ctx->usb_devs_lock); + usbi_mutex_init(&ctx->open_devs_lock); + usbi_mutex_init(&ctx->hotplug_cbs_lock); + list_init(&ctx->usb_devs); + list_init(&ctx->open_devs); + list_init(&ctx->hotplug_cbs); + + usbi_mutex_static_lock(&active_contexts_lock); + if (first_init) { + first_init = 0; + list_init (&active_contexts_list); + } + list_add (&ctx->list, &active_contexts_list); + usbi_mutex_static_unlock(&active_contexts_lock); + + if (usbi_backend->init) { + r = usbi_backend->init(ctx); + if (r) + goto err_free_ctx; + } + + r = usbi_io_init(ctx); + if (r < 0) + goto err_backend_exit; + + usbi_mutex_static_unlock(&default_context_lock); + + if (context) + *context = ctx; + + return 0; + +err_backend_exit: + if (usbi_backend->exit) + usbi_backend->exit(); +err_free_ctx: + if (ctx == usbi_default_context) { + usbi_default_context = NULL; + default_context_refcnt--; + } + + usbi_mutex_static_lock(&active_contexts_lock); + list_del (&ctx->list); + usbi_mutex_static_unlock(&active_contexts_lock); + + usbi_mutex_lock(&ctx->usb_devs_lock); + list_for_each_entry_safe(dev, next, &ctx->usb_devs, list, struct libusb_device) { + list_del(&dev->list); + libusb_unref_device(dev); + } + usbi_mutex_unlock(&ctx->usb_devs_lock); + + usbi_mutex_destroy(&ctx->open_devs_lock); + usbi_mutex_destroy(&ctx->usb_devs_lock); + usbi_mutex_destroy(&ctx->hotplug_cbs_lock); + + free(ctx); +err_unlock: + usbi_mutex_static_unlock(&default_context_lock); + return r; +} + +/** \ingroup libusb_lib + * Deinitialize libusb. Should be called after closing all open devices and + * before your application terminates. + * \param ctx the context to deinitialize, or NULL for the default context + */ +void API_EXPORTED libusb_exit(struct libusb_context *ctx) +{ + struct libusb_device *dev, *next; + struct timeval tv = { 0, 0 }; + + usbi_dbg(""); + USBI_GET_CONTEXT(ctx); + + /* if working with default context, only actually do the deinitialization + * if we're the last user */ + usbi_mutex_static_lock(&default_context_lock); + if (ctx == usbi_default_context) { + if (--default_context_refcnt > 0) { + usbi_dbg("not destroying default context"); + usbi_mutex_static_unlock(&default_context_lock); + return; + } + usbi_dbg("destroying default context"); + usbi_default_context = NULL; + } + usbi_mutex_static_unlock(&default_context_lock); + + usbi_mutex_static_lock(&active_contexts_lock); + list_del (&ctx->list); + usbi_mutex_static_unlock(&active_contexts_lock); + + if (libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { + usbi_hotplug_deregister_all(ctx); + + /* + * Ensure any pending unplug events are read from the hotplug + * pipe. The usb_device-s hold in the events are no longer part + * of usb_devs, but the events still hold a reference! + * + * Note we don't do this if the application has left devices + * open (which implies a buggy app) to avoid packet completion + * handlers running when the app does not expect them to run. + */ + if (list_empty(&ctx->open_devs)) + libusb_handle_events_timeout(ctx, &tv); + + usbi_mutex_lock(&ctx->usb_devs_lock); + list_for_each_entry_safe(dev, next, &ctx->usb_devs, list, struct libusb_device) { + list_del(&dev->list); + libusb_unref_device(dev); + } + usbi_mutex_unlock(&ctx->usb_devs_lock); + } + + /* a few sanity checks. don't bother with locking because unless + * there is an application bug, nobody will be accessing these. */ + if (!list_empty(&ctx->usb_devs)) + usbi_warn(ctx, "some libusb_devices were leaked"); + if (!list_empty(&ctx->open_devs)) + usbi_warn(ctx, "application left some devices open"); + + usbi_io_exit(ctx); + if (usbi_backend->exit) + usbi_backend->exit(); + + usbi_mutex_destroy(&ctx->open_devs_lock); + usbi_mutex_destroy(&ctx->usb_devs_lock); + usbi_mutex_destroy(&ctx->hotplug_cbs_lock); + free(ctx); +} + +/** \ingroup libusb_misc + * Check at runtime if the loaded library has a given capability. + * This call should be performed after \ref libusb_init(), to ensure the + * backend has updated its capability set. + * + * \param capability the \ref libusb_capability to check for + * \returns nonzero if the running library has the capability, 0 otherwise + */ +int API_EXPORTED libusb_has_capability(uint32_t capability) +{ + switch (capability) { + case LIBUSB_CAP_HAS_CAPABILITY: + return 1; + case LIBUSB_CAP_HAS_HOTPLUG: + return !(usbi_backend->get_device_list); + case LIBUSB_CAP_HAS_HID_ACCESS: + return (usbi_backend->caps & USBI_CAP_HAS_HID_ACCESS); + case LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER: + return (usbi_backend->caps & USBI_CAP_SUPPORTS_DETACH_KERNEL_DRIVER); + } + return 0; +} + +/* this is defined in libusbi.h if needed */ +#ifdef LIBUSB_PRINTF_WIN32 +/* + * Prior to VS2015, Microsoft did not provide the snprintf() function and + * provided a vsnprintf() that did not guarantee NULL-terminated output. + * Microsoft did provide a _snprintf() function, but again it did not + * guarantee NULL-terminated output. + * + * The below implementations guarantee NULL-terminated output and are + * C99 compliant. + */ + +int usbi_snprintf(char *str, size_t size, const char *format, ...) +{ + va_list ap; + int ret; + + va_start(ap, format); + ret = usbi_vsnprintf(str, size, format, ap); + va_end(ap); + + return ret; +} + +int usbi_vsnprintf(char *str, size_t size, const char *format, va_list ap) +{ + int ret; + + ret = _vsnprintf(str, size, format, ap); + if (ret < 0 || ret == (int)size) { + /* Output is truncated, ensure buffer is NULL-terminated and + * determine how many characters would have been written. */ + str[size - 1] = '\0'; + if (ret < 0) + ret = _vsnprintf(NULL, 0, format, ap); + } + + return ret; +} +#endif + +static void usbi_log_str(struct libusb_context *ctx, + enum libusb_log_level level, const char * str) +{ +#if defined(USE_SYSTEM_LOGGING_FACILITY) +#if defined(OS_WINDOWS) + OutputDebugString(str); +#elif defined(OS_WINCE) + /* Windows CE only supports the Unicode version of OutputDebugString. */ + WCHAR wbuf[USBI_MAX_LOG_LEN]; + MultiByteToWideChar(CP_UTF8, 0, str, -1, wbuf, sizeof(wbuf)); + OutputDebugStringW(wbuf); +#elif defined(__ANDROID__) + int priority = ANDROID_LOG_UNKNOWN; + switch (level) { + case LIBUSB_LOG_LEVEL_INFO: priority = ANDROID_LOG_INFO; break; + case LIBUSB_LOG_LEVEL_WARNING: priority = ANDROID_LOG_WARN; break; + case LIBUSB_LOG_LEVEL_ERROR: priority = ANDROID_LOG_ERROR; break; + case LIBUSB_LOG_LEVEL_DEBUG: priority = ANDROID_LOG_DEBUG; break; + } + __android_log_write(priority, "libusb", str); +#elif defined(HAVE_SYSLOG_FUNC) + int syslog_level = LOG_INFO; + switch (level) { + case LIBUSB_LOG_LEVEL_INFO: syslog_level = LOG_INFO; break; + case LIBUSB_LOG_LEVEL_WARNING: syslog_level = LOG_WARNING; break; + case LIBUSB_LOG_LEVEL_ERROR: syslog_level = LOG_ERR; break; + case LIBUSB_LOG_LEVEL_DEBUG: syslog_level = LOG_DEBUG; break; + } + syslog(syslog_level, "%s", str); +#else /* All of gcc, Clang, XCode seem to use #warning */ +#warning System logging is not supported on this platform. Logging to stderr will be used instead. + fputs(str, stderr); +#endif +#else + fputs(str, stderr); +#endif /* USE_SYSTEM_LOGGING_FACILITY */ + UNUSED(ctx); + UNUSED(level); +} + +void usbi_log_v(struct libusb_context *ctx, enum libusb_log_level level, + const char *function, const char *format, va_list args) +{ + const char *prefix = ""; + char buf[USBI_MAX_LOG_LEN]; + struct timespec now; + int global_debug, header_len, text_len; + static int has_debug_header_been_displayed = 0; + +#ifdef ENABLE_DEBUG_LOGGING + global_debug = 1; + UNUSED(ctx); +#else + int ctx_level = 0; + + USBI_GET_CONTEXT(ctx); + if (ctx) { + ctx_level = ctx->debug; + } else { + char *dbg = getenv("LIBUSB_DEBUG"); + if (dbg) + ctx_level = atoi(dbg); + } + global_debug = (ctx_level == LIBUSB_LOG_LEVEL_DEBUG); + if (!ctx_level) + return; + if (level == LIBUSB_LOG_LEVEL_WARNING && ctx_level < LIBUSB_LOG_LEVEL_WARNING) + return; + if (level == LIBUSB_LOG_LEVEL_INFO && ctx_level < LIBUSB_LOG_LEVEL_INFO) + return; + if (level == LIBUSB_LOG_LEVEL_DEBUG && ctx_level < LIBUSB_LOG_LEVEL_DEBUG) + return; +#endif + + usbi_backend->clock_gettime(USBI_CLOCK_REALTIME, &now); + if ((global_debug) && (!has_debug_header_been_displayed)) { + has_debug_header_been_displayed = 1; + usbi_log_str(ctx, LIBUSB_LOG_LEVEL_DEBUG, "[timestamp] [threadID] facility level [function call] " USBI_LOG_LINE_END); + usbi_log_str(ctx, LIBUSB_LOG_LEVEL_DEBUG, "--------------------------------------------------------------------------------" USBI_LOG_LINE_END); + } + if (now.tv_nsec < timestamp_origin.tv_nsec) { + now.tv_sec--; + now.tv_nsec += 1000000000L; + } + now.tv_sec -= timestamp_origin.tv_sec; + now.tv_nsec -= timestamp_origin.tv_nsec; + + switch (level) { + case LIBUSB_LOG_LEVEL_INFO: + prefix = "info"; + break; + case LIBUSB_LOG_LEVEL_WARNING: + prefix = "warning"; + break; + case LIBUSB_LOG_LEVEL_ERROR: + prefix = "error"; + break; + case LIBUSB_LOG_LEVEL_DEBUG: + prefix = "debug"; + break; + case LIBUSB_LOG_LEVEL_NONE: + return; + default: + prefix = "unknown"; + break; + } + + if (global_debug) { + header_len = snprintf(buf, sizeof(buf), + "[%2d.%06d] [%08x] libusb: %s [%s] ", + (int)now.tv_sec, (int)(now.tv_nsec / 1000L), usbi_get_tid(), prefix, function); + } else { + header_len = snprintf(buf, sizeof(buf), + "libusb: %s [%s] ", prefix, function); + } + + if (header_len < 0 || header_len >= (int)sizeof(buf)) { + /* Somehow snprintf failed to write to the buffer, + * remove the header so something useful is output. */ + header_len = 0; + } + /* Make sure buffer is NUL terminated */ + buf[header_len] = '\0'; + text_len = vsnprintf(buf + header_len, sizeof(buf) - header_len, + format, args); + if (text_len < 0 || text_len + header_len >= (int)sizeof(buf)) { + /* Truncated log output. On some platforms a -1 return value means + * that the output was truncated. */ + text_len = sizeof(buf) - header_len; + } + if (header_len + text_len + sizeof(USBI_LOG_LINE_END) >= sizeof(buf)) { + /* Need to truncate the text slightly to fit on the terminator. */ + text_len -= (header_len + text_len + sizeof(USBI_LOG_LINE_END)) - sizeof(buf); + } + strcpy(buf + header_len + text_len, USBI_LOG_LINE_END); + + usbi_log_str(ctx, level, buf); +} + +void usbi_log(struct libusb_context *ctx, enum libusb_log_level level, + const char *function, const char *format, ...) +{ + va_list args; + + va_start (args, format); + usbi_log_v(ctx, level, function, format, args); + va_end (args); +} + +/** \ingroup libusb_misc + * Returns a constant NULL-terminated string with the ASCII name of a libusb + * error or transfer status code. The caller must not free() the returned + * string. + * + * \param error_code The \ref libusb_error or libusb_transfer_status code to + * return the name of. + * \returns The error name, or the string **UNKNOWN** if the value of + * error_code is not a known error / status code. + */ +DEFAULT_VISIBILITY const char * LIBUSB_CALL libusb_error_name(int error_code) +{ + switch (error_code) { + case LIBUSB_ERROR_IO: + return "LIBUSB_ERROR_IO"; + case LIBUSB_ERROR_INVALID_PARAM: + return "LIBUSB_ERROR_INVALID_PARAM"; + case LIBUSB_ERROR_ACCESS: + return "LIBUSB_ERROR_ACCESS"; + case LIBUSB_ERROR_NO_DEVICE: + return "LIBUSB_ERROR_NO_DEVICE"; + case LIBUSB_ERROR_NOT_FOUND: + return "LIBUSB_ERROR_NOT_FOUND"; + case LIBUSB_ERROR_BUSY: + return "LIBUSB_ERROR_BUSY"; + case LIBUSB_ERROR_TIMEOUT: + return "LIBUSB_ERROR_TIMEOUT"; + case LIBUSB_ERROR_OVERFLOW: + return "LIBUSB_ERROR_OVERFLOW"; + case LIBUSB_ERROR_PIPE: + return "LIBUSB_ERROR_PIPE"; + case LIBUSB_ERROR_INTERRUPTED: + return "LIBUSB_ERROR_INTERRUPTED"; + case LIBUSB_ERROR_NO_MEM: + return "LIBUSB_ERROR_NO_MEM"; + case LIBUSB_ERROR_NOT_SUPPORTED: + return "LIBUSB_ERROR_NOT_SUPPORTED"; + case LIBUSB_ERROR_OTHER: + return "LIBUSB_ERROR_OTHER"; + + case LIBUSB_TRANSFER_ERROR: + return "LIBUSB_TRANSFER_ERROR"; + case LIBUSB_TRANSFER_TIMED_OUT: + return "LIBUSB_TRANSFER_TIMED_OUT"; + case LIBUSB_TRANSFER_CANCELLED: + return "LIBUSB_TRANSFER_CANCELLED"; + case LIBUSB_TRANSFER_STALL: + return "LIBUSB_TRANSFER_STALL"; + case LIBUSB_TRANSFER_NO_DEVICE: + return "LIBUSB_TRANSFER_NO_DEVICE"; + case LIBUSB_TRANSFER_OVERFLOW: + return "LIBUSB_TRANSFER_OVERFLOW"; + + case 0: + return "LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED"; + default: + return "**UNKNOWN**"; + } +} + +/** \ingroup libusb_misc + * Returns a pointer to const struct libusb_version with the version + * (major, minor, micro, nano and rc) of the running library. + */ +DEFAULT_VISIBILITY +const struct libusb_version * LIBUSB_CALL libusb_get_version(void) +{ + return &libusb_version_internal; +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/descriptor.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/descriptor.c new file mode 100644 index 000000000..4c9435fff --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/descriptor.c @@ -0,0 +1,1191 @@ +/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ +/* + * USB descriptor handling functions for libusb + * Copyright © 2007 Daniel Drake + * Copyright © 2001 Johannes Erdfelt + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include + +#include "libusbi.h" + +#define DESC_HEADER_LENGTH 2 +#define DEVICE_DESC_LENGTH 18 +#define CONFIG_DESC_LENGTH 9 +#define INTERFACE_DESC_LENGTH 9 +#define ENDPOINT_DESC_LENGTH 7 +#define ENDPOINT_AUDIO_DESC_LENGTH 9 + +/** @defgroup libusb_desc USB descriptors + * This page details how to examine the various standard USB descriptors + * for detected devices + */ + +/* set host_endian if the w values are already in host endian format, + * as opposed to bus endian. */ +int usbi_parse_descriptor(const unsigned char *source, const char *descriptor, + void *dest, int host_endian) +{ + const unsigned char *sp = source; + unsigned char *dp = dest; + uint16_t w; + const char *cp; + uint32_t d; + + for (cp = descriptor; *cp; cp++) { + switch (*cp) { + case 'b': /* 8-bit byte */ + *dp++ = *sp++; + break; + case 'w': /* 16-bit word, convert from little endian to CPU */ + dp += ((uintptr_t)dp & 1); /* Align to word boundary */ + + if (host_endian) { + memcpy(dp, sp, 2); + } else { + w = (sp[1] << 8) | sp[0]; + *((uint16_t *)dp) = w; + } + sp += 2; + dp += 2; + break; + case 'd': /* 32-bit word, convert from little endian to CPU */ + dp += ((uintptr_t)dp & 1); /* Align to word boundary */ + + if (host_endian) { + memcpy(dp, sp, 4); + } else { + d = (sp[3] << 24) | (sp[2] << 16) | + (sp[1] << 8) | sp[0]; + *((uint32_t *)dp) = d; + } + sp += 4; + dp += 4; + break; + case 'u': /* 16 byte UUID */ + memcpy(dp, sp, 16); + sp += 16; + dp += 16; + break; + } + } + + return (int) (sp - source); +} + +static void clear_endpoint(struct libusb_endpoint_descriptor *endpoint) +{ + free((void *) endpoint->extra); +} + +static int parse_endpoint(struct libusb_context *ctx, + struct libusb_endpoint_descriptor *endpoint, unsigned char *buffer, + int size, int host_endian) +{ + struct usb_descriptor_header header; + unsigned char *extra; + unsigned char *begin; + int parsed = 0; + int len; + + if (size < DESC_HEADER_LENGTH) { + usbi_err(ctx, "short endpoint descriptor read %d/%d", + size, DESC_HEADER_LENGTH); + return LIBUSB_ERROR_IO; + } + + usbi_parse_descriptor(buffer, "bb", &header, 0); + if (header.bDescriptorType != LIBUSB_DT_ENDPOINT) { + usbi_err(ctx, "unexpected descriptor %x (expected %x)", + header.bDescriptorType, LIBUSB_DT_ENDPOINT); + return parsed; + } + if (header.bLength > size) { + usbi_warn(ctx, "short endpoint descriptor read %d/%d", + size, header.bLength); + return parsed; + } + if (header.bLength >= ENDPOINT_AUDIO_DESC_LENGTH) + usbi_parse_descriptor(buffer, "bbbbwbbb", endpoint, host_endian); + else if (header.bLength >= ENDPOINT_DESC_LENGTH) + usbi_parse_descriptor(buffer, "bbbbwb", endpoint, host_endian); + else { + usbi_err(ctx, "invalid endpoint bLength (%d)", header.bLength); + return LIBUSB_ERROR_IO; + } + + buffer += header.bLength; + size -= header.bLength; + parsed += header.bLength; + + /* Skip over the rest of the Class Specific or Vendor Specific */ + /* descriptors */ + begin = buffer; + while (size >= DESC_HEADER_LENGTH) { + usbi_parse_descriptor(buffer, "bb", &header, 0); + if (header.bLength < DESC_HEADER_LENGTH) { + usbi_err(ctx, "invalid extra ep desc len (%d)", + header.bLength); + return LIBUSB_ERROR_IO; + } else if (header.bLength > size) { + usbi_warn(ctx, "short extra ep desc read %d/%d", + size, header.bLength); + return parsed; + } + + /* If we find another "proper" descriptor then we're done */ + if ((header.bDescriptorType == LIBUSB_DT_ENDPOINT) || + (header.bDescriptorType == LIBUSB_DT_INTERFACE) || + (header.bDescriptorType == LIBUSB_DT_CONFIG) || + (header.bDescriptorType == LIBUSB_DT_DEVICE)) + break; + + usbi_dbg("skipping descriptor %x", header.bDescriptorType); + buffer += header.bLength; + size -= header.bLength; + parsed += header.bLength; + } + + /* Copy any unknown descriptors into a storage area for drivers */ + /* to later parse */ + len = (int)(buffer - begin); + if (!len) { + endpoint->extra = NULL; + endpoint->extra_length = 0; + return parsed; + } + + extra = malloc(len); + endpoint->extra = extra; + if (!extra) { + endpoint->extra_length = 0; + return LIBUSB_ERROR_NO_MEM; + } + + memcpy(extra, begin, len); + endpoint->extra_length = len; + + return parsed; +} + +static void clear_interface(struct libusb_interface *usb_interface) +{ + int i; + int j; + + if (usb_interface->altsetting) { + for (i = 0; i < usb_interface->num_altsetting; i++) { + struct libusb_interface_descriptor *ifp = + (struct libusb_interface_descriptor *) + usb_interface->altsetting + i; + free((void *) ifp->extra); + if (ifp->endpoint) { + for (j = 0; j < ifp->bNumEndpoints; j++) + clear_endpoint((struct libusb_endpoint_descriptor *) + ifp->endpoint + j); + } + free((void *) ifp->endpoint); + } + } + free((void *) usb_interface->altsetting); + usb_interface->altsetting = NULL; +} + +static int parse_interface(libusb_context *ctx, + struct libusb_interface *usb_interface, unsigned char *buffer, int size, + int host_endian) +{ + int i; + int len; + int r; + int parsed = 0; + int interface_number = -1; + struct usb_descriptor_header header; + struct libusb_interface_descriptor *ifp; + unsigned char *begin; + + usb_interface->num_altsetting = 0; + + while (size >= INTERFACE_DESC_LENGTH) { + struct libusb_interface_descriptor *altsetting = + (struct libusb_interface_descriptor *) usb_interface->altsetting; + altsetting = usbi_reallocf(altsetting, + sizeof(struct libusb_interface_descriptor) * + (usb_interface->num_altsetting + 1)); + if (!altsetting) { + r = LIBUSB_ERROR_NO_MEM; + goto err; + } + usb_interface->altsetting = altsetting; + + ifp = altsetting + usb_interface->num_altsetting; + usbi_parse_descriptor(buffer, "bbbbbbbbb", ifp, 0); + if (ifp->bDescriptorType != LIBUSB_DT_INTERFACE) { + usbi_err(ctx, "unexpected descriptor %x (expected %x)", + ifp->bDescriptorType, LIBUSB_DT_INTERFACE); + return parsed; + } + if (ifp->bLength < INTERFACE_DESC_LENGTH) { + usbi_err(ctx, "invalid interface bLength (%d)", + ifp->bLength); + r = LIBUSB_ERROR_IO; + goto err; + } + if (ifp->bLength > size) { + usbi_warn(ctx, "short intf descriptor read %d/%d", + size, ifp->bLength); + return parsed; + } + if (ifp->bNumEndpoints > USB_MAXENDPOINTS) { + usbi_err(ctx, "too many endpoints (%d)", ifp->bNumEndpoints); + r = LIBUSB_ERROR_IO; + goto err; + } + + usb_interface->num_altsetting++; + ifp->extra = NULL; + ifp->extra_length = 0; + ifp->endpoint = NULL; + + if (interface_number == -1) + interface_number = ifp->bInterfaceNumber; + + /* Skip over the interface */ + buffer += ifp->bLength; + parsed += ifp->bLength; + size -= ifp->bLength; + + begin = buffer; + + /* Skip over any interface, class or vendor descriptors */ + while (size >= DESC_HEADER_LENGTH) { + usbi_parse_descriptor(buffer, "bb", &header, 0); + if (header.bLength < DESC_HEADER_LENGTH) { + usbi_err(ctx, + "invalid extra intf desc len (%d)", + header.bLength); + r = LIBUSB_ERROR_IO; + goto err; + } else if (header.bLength > size) { + usbi_warn(ctx, + "short extra intf desc read %d/%d", + size, header.bLength); + return parsed; + } + + /* If we find another "proper" descriptor then we're done */ + if ((header.bDescriptorType == LIBUSB_DT_INTERFACE) || + (header.bDescriptorType == LIBUSB_DT_ENDPOINT) || + (header.bDescriptorType == LIBUSB_DT_CONFIG) || + (header.bDescriptorType == LIBUSB_DT_DEVICE)) + break; + + buffer += header.bLength; + parsed += header.bLength; + size -= header.bLength; + } + + /* Copy any unknown descriptors into a storage area for */ + /* drivers to later parse */ + len = (int)(buffer - begin); + if (len) { + ifp->extra = malloc(len); + if (!ifp->extra) { + r = LIBUSB_ERROR_NO_MEM; + goto err; + } + memcpy((unsigned char *) ifp->extra, begin, len); + ifp->extra_length = len; + } + + if (ifp->bNumEndpoints > 0) { + struct libusb_endpoint_descriptor *endpoint; + endpoint = calloc(ifp->bNumEndpoints, sizeof(struct libusb_endpoint_descriptor)); + ifp->endpoint = endpoint; + if (!endpoint) { + r = LIBUSB_ERROR_NO_MEM; + goto err; + } + + for (i = 0; i < ifp->bNumEndpoints; i++) { + r = parse_endpoint(ctx, endpoint + i, buffer, size, + host_endian); + if (r < 0) + goto err; + if (r == 0) { + ifp->bNumEndpoints = (uint8_t)i; + break;; + } + + buffer += r; + parsed += r; + size -= r; + } + } + + /* We check to see if it's an alternate to this one */ + ifp = (struct libusb_interface_descriptor *) buffer; + if (size < LIBUSB_DT_INTERFACE_SIZE || + ifp->bDescriptorType != LIBUSB_DT_INTERFACE || + ifp->bInterfaceNumber != interface_number) + return parsed; + } + + return parsed; +err: + clear_interface(usb_interface); + return r; +} + +static void clear_configuration(struct libusb_config_descriptor *config) +{ + int i; + if (config->interface) { + for (i = 0; i < config->bNumInterfaces; i++) + clear_interface((struct libusb_interface *) + config->interface + i); + } + free((void *) config->interface); + free((void *) config->extra); +} + +static int parse_configuration(struct libusb_context *ctx, + struct libusb_config_descriptor *config, unsigned char *buffer, + int size, int host_endian) +{ + int i; + int r; + struct usb_descriptor_header header; + struct libusb_interface *usb_interface; + + if (size < LIBUSB_DT_CONFIG_SIZE) { + usbi_err(ctx, "short config descriptor read %d/%d", + size, LIBUSB_DT_CONFIG_SIZE); + return LIBUSB_ERROR_IO; + } + + usbi_parse_descriptor(buffer, "bbwbbbbb", config, host_endian); + if (config->bDescriptorType != LIBUSB_DT_CONFIG) { + usbi_err(ctx, "unexpected descriptor %x (expected %x)", + config->bDescriptorType, LIBUSB_DT_CONFIG); + return LIBUSB_ERROR_IO; + } + if (config->bLength < LIBUSB_DT_CONFIG_SIZE) { + usbi_err(ctx, "invalid config bLength (%d)", config->bLength); + return LIBUSB_ERROR_IO; + } + if (config->bLength > size) { + usbi_err(ctx, "short config descriptor read %d/%d", + size, config->bLength); + return LIBUSB_ERROR_IO; + } + if (config->bNumInterfaces > USB_MAXINTERFACES) { + usbi_err(ctx, "too many interfaces (%d)", config->bNumInterfaces); + return LIBUSB_ERROR_IO; + } + + usb_interface = calloc(config->bNumInterfaces, sizeof(struct libusb_interface)); + config->interface = usb_interface; + if (!usb_interface) + return LIBUSB_ERROR_NO_MEM; + + buffer += config->bLength; + size -= config->bLength; + + config->extra = NULL; + config->extra_length = 0; + + for (i = 0; i < config->bNumInterfaces; i++) { + int len; + unsigned char *begin; + + /* Skip over the rest of the Class Specific or Vendor */ + /* Specific descriptors */ + begin = buffer; + while (size >= DESC_HEADER_LENGTH) { + usbi_parse_descriptor(buffer, "bb", &header, 0); + + if (header.bLength < DESC_HEADER_LENGTH) { + usbi_err(ctx, + "invalid extra config desc len (%d)", + header.bLength); + r = LIBUSB_ERROR_IO; + goto err; + } else if (header.bLength > size) { + usbi_warn(ctx, + "short extra config desc read %d/%d", + size, header.bLength); + config->bNumInterfaces = (uint8_t)i; + return size; + } + + /* If we find another "proper" descriptor then we're done */ + if ((header.bDescriptorType == LIBUSB_DT_ENDPOINT) || + (header.bDescriptorType == LIBUSB_DT_INTERFACE) || + (header.bDescriptorType == LIBUSB_DT_CONFIG) || + (header.bDescriptorType == LIBUSB_DT_DEVICE)) + break; + + usbi_dbg("skipping descriptor 0x%x", header.bDescriptorType); + buffer += header.bLength; + size -= header.bLength; + } + + /* Copy any unknown descriptors into a storage area for */ + /* drivers to later parse */ + len = (int)(buffer - begin); + if (len) { + /* FIXME: We should realloc and append here */ + if (!config->extra_length) { + config->extra = malloc(len); + if (!config->extra) { + r = LIBUSB_ERROR_NO_MEM; + goto err; + } + + memcpy((unsigned char *) config->extra, begin, len); + config->extra_length = len; + } + } + + r = parse_interface(ctx, usb_interface + i, buffer, size, host_endian); + if (r < 0) + goto err; + if (r == 0) { + config->bNumInterfaces = (uint8_t)i; + break; + } + + buffer += r; + size -= r; + } + + return size; + +err: + clear_configuration(config); + return r; +} + +static int raw_desc_to_config(struct libusb_context *ctx, + unsigned char *buf, int size, int host_endian, + struct libusb_config_descriptor **config) +{ + struct libusb_config_descriptor *_config = malloc(sizeof(*_config)); + int r; + + if (!_config) + return LIBUSB_ERROR_NO_MEM; + + r = parse_configuration(ctx, _config, buf, size, host_endian); + if (r < 0) { + usbi_err(ctx, "parse_configuration failed with error %d", r); + free(_config); + return r; + } else if (r > 0) { + usbi_warn(ctx, "still %d bytes of descriptor data left", r); + } + + *config = _config; + return LIBUSB_SUCCESS; +} + +int usbi_device_cache_descriptor(libusb_device *dev) +{ + int r, host_endian = 0; + + r = usbi_backend->get_device_descriptor(dev, (unsigned char *) &dev->device_descriptor, + &host_endian); + if (r < 0) + return r; + + if (!host_endian) { + dev->device_descriptor.bcdUSB = libusb_le16_to_cpu(dev->device_descriptor.bcdUSB); + dev->device_descriptor.idVendor = libusb_le16_to_cpu(dev->device_descriptor.idVendor); + dev->device_descriptor.idProduct = libusb_le16_to_cpu(dev->device_descriptor.idProduct); + dev->device_descriptor.bcdDevice = libusb_le16_to_cpu(dev->device_descriptor.bcdDevice); + } + + return LIBUSB_SUCCESS; +} + +/** \ingroup libusb_desc + * Get the USB device descriptor for a given device. + * + * This is a non-blocking function; the device descriptor is cached in memory. + * + * Note since libusb-1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102, this + * function always succeeds. + * + * \param dev the device + * \param desc output location for the descriptor data + * \returns 0 on success or a LIBUSB_ERROR code on failure + */ +int API_EXPORTED libusb_get_device_descriptor(libusb_device *dev, + struct libusb_device_descriptor *desc) +{ + usbi_dbg(""); + memcpy((unsigned char *) desc, (unsigned char *) &dev->device_descriptor, + sizeof (dev->device_descriptor)); + return 0; +} + +/** \ingroup libusb_desc + * Get the USB configuration descriptor for the currently active configuration. + * This is a non-blocking function which does not involve any requests being + * sent to the device. + * + * \param dev a device + * \param config output location for the USB configuration descriptor. Only + * valid if 0 was returned. Must be freed with libusb_free_config_descriptor() + * after use. + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the device is in unconfigured state + * \returns another LIBUSB_ERROR code on error + * \see libusb_get_config_descriptor + */ +int API_EXPORTED libusb_get_active_config_descriptor(libusb_device *dev, + struct libusb_config_descriptor **config) +{ + struct libusb_config_descriptor _config; + unsigned char tmp[LIBUSB_DT_CONFIG_SIZE]; + unsigned char *buf = NULL; + int host_endian = 0; + int r; + + r = usbi_backend->get_active_config_descriptor(dev, tmp, + LIBUSB_DT_CONFIG_SIZE, &host_endian); + if (r < 0) + return r; + if (r < LIBUSB_DT_CONFIG_SIZE) { + usbi_err(dev->ctx, "short config descriptor read %d/%d", + r, LIBUSB_DT_CONFIG_SIZE); + return LIBUSB_ERROR_IO; + } + + usbi_parse_descriptor(tmp, "bbw", &_config, host_endian); + buf = malloc(_config.wTotalLength); + if (!buf) + return LIBUSB_ERROR_NO_MEM; + + r = usbi_backend->get_active_config_descriptor(dev, buf, + _config.wTotalLength, &host_endian); + if (r >= 0) + r = raw_desc_to_config(dev->ctx, buf, r, host_endian, config); + + free(buf); + return r; +} + +/** \ingroup libusb_desc + * Get a USB configuration descriptor based on its index. + * This is a non-blocking function which does not involve any requests being + * sent to the device. + * + * \param dev a device + * \param config_index the index of the configuration you wish to retrieve + * \param config output location for the USB configuration descriptor. Only + * valid if 0 was returned. Must be freed with libusb_free_config_descriptor() + * after use. + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the configuration does not exist + * \returns another LIBUSB_ERROR code on error + * \see libusb_get_active_config_descriptor() + * \see libusb_get_config_descriptor_by_value() + */ +int API_EXPORTED libusb_get_config_descriptor(libusb_device *dev, + uint8_t config_index, struct libusb_config_descriptor **config) +{ + struct libusb_config_descriptor _config; + unsigned char tmp[LIBUSB_DT_CONFIG_SIZE]; + unsigned char *buf = NULL; + int host_endian = 0; + int r; + + usbi_dbg("index %d", config_index); + if (config_index >= dev->num_configurations) + return LIBUSB_ERROR_NOT_FOUND; + + r = usbi_backend->get_config_descriptor(dev, config_index, tmp, + LIBUSB_DT_CONFIG_SIZE, &host_endian); + if (r < 0) + return r; + if (r < LIBUSB_DT_CONFIG_SIZE) { + usbi_err(dev->ctx, "short config descriptor read %d/%d", + r, LIBUSB_DT_CONFIG_SIZE); + return LIBUSB_ERROR_IO; + } + + usbi_parse_descriptor(tmp, "bbw", &_config, host_endian); + buf = malloc(_config.wTotalLength); + if (!buf) + return LIBUSB_ERROR_NO_MEM; + + r = usbi_backend->get_config_descriptor(dev, config_index, buf, + _config.wTotalLength, &host_endian); + if (r >= 0) + r = raw_desc_to_config(dev->ctx, buf, r, host_endian, config); + + free(buf); + return r; +} + +/* iterate through all configurations, returning the index of the configuration + * matching a specific bConfigurationValue in the idx output parameter, or -1 + * if the config was not found. + * returns 0 on success or a LIBUSB_ERROR code + */ +int usbi_get_config_index_by_value(struct libusb_device *dev, + uint8_t bConfigurationValue, int *idx) +{ + uint8_t i; + + usbi_dbg("value %d", bConfigurationValue); + for (i = 0; i < dev->num_configurations; i++) { + unsigned char tmp[6]; + int host_endian; + int r = usbi_backend->get_config_descriptor(dev, i, tmp, sizeof(tmp), + &host_endian); + if (r < 0) { + *idx = -1; + return r; + } + if (tmp[5] == bConfigurationValue) { + *idx = i; + return 0; + } + } + + *idx = -1; + return 0; +} + +/** \ingroup libusb_desc + * Get a USB configuration descriptor with a specific bConfigurationValue. + * This is a non-blocking function which does not involve any requests being + * sent to the device. + * + * \param dev a device + * \param bConfigurationValue the bConfigurationValue of the configuration you + * wish to retrieve + * \param config output location for the USB configuration descriptor. Only + * valid if 0 was returned. Must be freed with libusb_free_config_descriptor() + * after use. + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the configuration does not exist + * \returns another LIBUSB_ERROR code on error + * \see libusb_get_active_config_descriptor() + * \see libusb_get_config_descriptor() + */ +int API_EXPORTED libusb_get_config_descriptor_by_value(libusb_device *dev, + uint8_t bConfigurationValue, struct libusb_config_descriptor **config) +{ + int r, idx, host_endian; + unsigned char *buf = NULL; + + if (usbi_backend->get_config_descriptor_by_value) { + r = usbi_backend->get_config_descriptor_by_value(dev, + bConfigurationValue, &buf, &host_endian); + if (r < 0) + return r; + return raw_desc_to_config(dev->ctx, buf, r, host_endian, config); + } + + r = usbi_get_config_index_by_value(dev, bConfigurationValue, &idx); + if (r < 0) + return r; + else if (idx == -1) + return LIBUSB_ERROR_NOT_FOUND; + else + return libusb_get_config_descriptor(dev, (uint8_t) idx, config); +} + +/** \ingroup libusb_desc + * Free a configuration descriptor obtained from + * libusb_get_active_config_descriptor() or libusb_get_config_descriptor(). + * It is safe to call this function with a NULL config parameter, in which + * case the function simply returns. + * + * \param config the configuration descriptor to free + */ +void API_EXPORTED libusb_free_config_descriptor( + struct libusb_config_descriptor *config) +{ + if (!config) + return; + + clear_configuration(config); + free(config); +} + +/** \ingroup libusb_desc + * Get an endpoints superspeed endpoint companion descriptor (if any) + * + * \param ctx the context to operate on, or NULL for the default context + * \param endpoint endpoint descriptor from which to get the superspeed + * endpoint companion descriptor + * \param ep_comp output location for the superspeed endpoint companion + * descriptor. Only valid if 0 was returned. Must be freed with + * libusb_free_ss_endpoint_companion_descriptor() after use. + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the configuration does not exist + * \returns another LIBUSB_ERROR code on error + */ +int API_EXPORTED libusb_get_ss_endpoint_companion_descriptor( + struct libusb_context *ctx, + const struct libusb_endpoint_descriptor *endpoint, + struct libusb_ss_endpoint_companion_descriptor **ep_comp) +{ + struct usb_descriptor_header header; + int size = endpoint->extra_length; + const unsigned char *buffer = endpoint->extra; + + *ep_comp = NULL; + + while (size >= DESC_HEADER_LENGTH) { + usbi_parse_descriptor(buffer, "bb", &header, 0); + if (header.bLength < 2 || header.bLength > size) { + usbi_err(ctx, "invalid descriptor length %d", + header.bLength); + return LIBUSB_ERROR_IO; + } + if (header.bDescriptorType != LIBUSB_DT_SS_ENDPOINT_COMPANION) { + buffer += header.bLength; + size -= header.bLength; + continue; + } + if (header.bLength < LIBUSB_DT_SS_ENDPOINT_COMPANION_SIZE) { + usbi_err(ctx, "invalid ss-ep-comp-desc length %d", + header.bLength); + return LIBUSB_ERROR_IO; + } + *ep_comp = malloc(sizeof(**ep_comp)); + if (*ep_comp == NULL) + return LIBUSB_ERROR_NO_MEM; + usbi_parse_descriptor(buffer, "bbbbw", *ep_comp, 0); + return LIBUSB_SUCCESS; + } + return LIBUSB_ERROR_NOT_FOUND; +} + +/** \ingroup libusb_desc + * Free a superspeed endpoint companion descriptor obtained from + * libusb_get_ss_endpoint_companion_descriptor(). + * It is safe to call this function with a NULL ep_comp parameter, in which + * case the function simply returns. + * + * \param ep_comp the superspeed endpoint companion descriptor to free + */ +void API_EXPORTED libusb_free_ss_endpoint_companion_descriptor( + struct libusb_ss_endpoint_companion_descriptor *ep_comp) +{ + free(ep_comp); +} + +static int parse_bos(struct libusb_context *ctx, + struct libusb_bos_descriptor **bos, + unsigned char *buffer, int size, int host_endian) +{ + struct libusb_bos_descriptor bos_header, *_bos; + struct libusb_bos_dev_capability_descriptor dev_cap; + int i; + + if (size < LIBUSB_DT_BOS_SIZE) { + usbi_err(ctx, "short bos descriptor read %d/%d", + size, LIBUSB_DT_BOS_SIZE); + return LIBUSB_ERROR_IO; + } + + usbi_parse_descriptor(buffer, "bbwb", &bos_header, host_endian); + if (bos_header.bDescriptorType != LIBUSB_DT_BOS) { + usbi_err(ctx, "unexpected descriptor %x (expected %x)", + bos_header.bDescriptorType, LIBUSB_DT_BOS); + return LIBUSB_ERROR_IO; + } + if (bos_header.bLength < LIBUSB_DT_BOS_SIZE) { + usbi_err(ctx, "invalid bos bLength (%d)", bos_header.bLength); + return LIBUSB_ERROR_IO; + } + if (bos_header.bLength > size) { + usbi_err(ctx, "short bos descriptor read %d/%d", + size, bos_header.bLength); + return LIBUSB_ERROR_IO; + } + + _bos = calloc (1, + sizeof(*_bos) + bos_header.bNumDeviceCaps * sizeof(void *)); + if (!_bos) + return LIBUSB_ERROR_NO_MEM; + + usbi_parse_descriptor(buffer, "bbwb", _bos, host_endian); + buffer += bos_header.bLength; + size -= bos_header.bLength; + + /* Get the device capability descriptors */ + for (i = 0; i < bos_header.bNumDeviceCaps; i++) { + if (size < LIBUSB_DT_DEVICE_CAPABILITY_SIZE) { + usbi_warn(ctx, "short dev-cap descriptor read %d/%d", + size, LIBUSB_DT_DEVICE_CAPABILITY_SIZE); + break; + } + usbi_parse_descriptor(buffer, "bbb", &dev_cap, host_endian); + if (dev_cap.bDescriptorType != LIBUSB_DT_DEVICE_CAPABILITY) { + usbi_warn(ctx, "unexpected descriptor %x (expected %x)", + dev_cap.bDescriptorType, LIBUSB_DT_DEVICE_CAPABILITY); + break; + } + if (dev_cap.bLength < LIBUSB_DT_DEVICE_CAPABILITY_SIZE) { + usbi_err(ctx, "invalid dev-cap bLength (%d)", + dev_cap.bLength); + libusb_free_bos_descriptor(_bos); + return LIBUSB_ERROR_IO; + } + if (dev_cap.bLength > size) { + usbi_warn(ctx, "short dev-cap descriptor read %d/%d", + size, dev_cap.bLength); + break; + } + + _bos->dev_capability[i] = malloc(dev_cap.bLength); + if (!_bos->dev_capability[i]) { + libusb_free_bos_descriptor(_bos); + return LIBUSB_ERROR_NO_MEM; + } + memcpy(_bos->dev_capability[i], buffer, dev_cap.bLength); + buffer += dev_cap.bLength; + size -= dev_cap.bLength; + } + _bos->bNumDeviceCaps = (uint8_t)i; + *bos = _bos; + + return LIBUSB_SUCCESS; +} + +/** \ingroup libusb_desc + * Get a Binary Object Store (BOS) descriptor + * This is a BLOCKING function, which will send requests to the device. + * + * \param dev_handle the handle of an open libusb device + * \param bos output location for the BOS descriptor. Only valid if 0 was returned. + * Must be freed with \ref libusb_free_bos_descriptor() after use. + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the device doesn't have a BOS descriptor + * \returns another LIBUSB_ERROR code on error + */ +int API_EXPORTED libusb_get_bos_descriptor(libusb_device_handle *dev_handle, + struct libusb_bos_descriptor **bos) +{ + struct libusb_bos_descriptor _bos; + uint8_t bos_header[LIBUSB_DT_BOS_SIZE] = {0}; + unsigned char *bos_data = NULL; + const int host_endian = 0; + int r; + + /* Read the BOS. This generates 2 requests on the bus, + * one for the header, and one for the full BOS */ + r = libusb_get_descriptor(dev_handle, LIBUSB_DT_BOS, 0, bos_header, + LIBUSB_DT_BOS_SIZE); + if (r < 0) { + if (r != LIBUSB_ERROR_PIPE) + usbi_err(HANDLE_CTX(dev_handle), "failed to read BOS (%d)", r); + return r; + } + if (r < LIBUSB_DT_BOS_SIZE) { + usbi_err(HANDLE_CTX(dev_handle), "short BOS read %d/%d", + r, LIBUSB_DT_BOS_SIZE); + return LIBUSB_ERROR_IO; + } + + usbi_parse_descriptor(bos_header, "bbwb", &_bos, host_endian); + usbi_dbg("found BOS descriptor: size %d bytes, %d capabilities", + _bos.wTotalLength, _bos.bNumDeviceCaps); + bos_data = calloc(_bos.wTotalLength, 1); + if (bos_data == NULL) + return LIBUSB_ERROR_NO_MEM; + + r = libusb_get_descriptor(dev_handle, LIBUSB_DT_BOS, 0, bos_data, + _bos.wTotalLength); + if (r >= 0) + r = parse_bos(HANDLE_CTX(dev_handle), bos, bos_data, r, host_endian); + else + usbi_err(HANDLE_CTX(dev_handle), "failed to read BOS (%d)", r); + + free(bos_data); + return r; +} + +/** \ingroup libusb_desc + * Free a BOS descriptor obtained from libusb_get_bos_descriptor(). + * It is safe to call this function with a NULL bos parameter, in which + * case the function simply returns. + * + * \param bos the BOS descriptor to free + */ +void API_EXPORTED libusb_free_bos_descriptor(struct libusb_bos_descriptor *bos) +{ + int i; + + if (!bos) + return; + + for (i = 0; i < bos->bNumDeviceCaps; i++) + free(bos->dev_capability[i]); + free(bos); +} + +/** \ingroup libusb_desc + * Get an USB 2.0 Extension descriptor + * + * \param ctx the context to operate on, or NULL for the default context + * \param dev_cap Device Capability descriptor with a bDevCapabilityType of + * \ref libusb_capability_type::LIBUSB_BT_USB_2_0_EXTENSION + * LIBUSB_BT_USB_2_0_EXTENSION + * \param usb_2_0_extension output location for the USB 2.0 Extension + * descriptor. Only valid if 0 was returned. Must be freed with + * libusb_free_usb_2_0_extension_descriptor() after use. + * \returns 0 on success + * \returns a LIBUSB_ERROR code on error + */ +int API_EXPORTED libusb_get_usb_2_0_extension_descriptor( + struct libusb_context *ctx, + struct libusb_bos_dev_capability_descriptor *dev_cap, + struct libusb_usb_2_0_extension_descriptor **usb_2_0_extension) +{ + struct libusb_usb_2_0_extension_descriptor *_usb_2_0_extension; + const int host_endian = 0; + + if (dev_cap->bDevCapabilityType != LIBUSB_BT_USB_2_0_EXTENSION) { + usbi_err(ctx, "unexpected bDevCapabilityType %x (expected %x)", + dev_cap->bDevCapabilityType, + LIBUSB_BT_USB_2_0_EXTENSION); + return LIBUSB_ERROR_INVALID_PARAM; + } + if (dev_cap->bLength < LIBUSB_BT_USB_2_0_EXTENSION_SIZE) { + usbi_err(ctx, "short dev-cap descriptor read %d/%d", + dev_cap->bLength, LIBUSB_BT_USB_2_0_EXTENSION_SIZE); + return LIBUSB_ERROR_IO; + } + + _usb_2_0_extension = malloc(sizeof(*_usb_2_0_extension)); + if (!_usb_2_0_extension) + return LIBUSB_ERROR_NO_MEM; + + usbi_parse_descriptor((unsigned char *)dev_cap, "bbbd", + _usb_2_0_extension, host_endian); + + *usb_2_0_extension = _usb_2_0_extension; + return LIBUSB_SUCCESS; +} + +/** \ingroup libusb_desc + * Free a USB 2.0 Extension descriptor obtained from + * libusb_get_usb_2_0_extension_descriptor(). + * It is safe to call this function with a NULL usb_2_0_extension parameter, + * in which case the function simply returns. + * + * \param usb_2_0_extension the USB 2.0 Extension descriptor to free + */ +void API_EXPORTED libusb_free_usb_2_0_extension_descriptor( + struct libusb_usb_2_0_extension_descriptor *usb_2_0_extension) +{ + free(usb_2_0_extension); +} + +/** \ingroup libusb_desc + * Get a SuperSpeed USB Device Capability descriptor + * + * \param ctx the context to operate on, or NULL for the default context + * \param dev_cap Device Capability descriptor with a bDevCapabilityType of + * \ref libusb_capability_type::LIBUSB_BT_SS_USB_DEVICE_CAPABILITY + * LIBUSB_BT_SS_USB_DEVICE_CAPABILITY + * \param ss_usb_device_cap output location for the SuperSpeed USB Device + * Capability descriptor. Only valid if 0 was returned. Must be freed with + * libusb_free_ss_usb_device_capability_descriptor() after use. + * \returns 0 on success + * \returns a LIBUSB_ERROR code on error + */ +int API_EXPORTED libusb_get_ss_usb_device_capability_descriptor( + struct libusb_context *ctx, + struct libusb_bos_dev_capability_descriptor *dev_cap, + struct libusb_ss_usb_device_capability_descriptor **ss_usb_device_cap) +{ + struct libusb_ss_usb_device_capability_descriptor *_ss_usb_device_cap; + const int host_endian = 0; + + if (dev_cap->bDevCapabilityType != LIBUSB_BT_SS_USB_DEVICE_CAPABILITY) { + usbi_err(ctx, "unexpected bDevCapabilityType %x (expected %x)", + dev_cap->bDevCapabilityType, + LIBUSB_BT_SS_USB_DEVICE_CAPABILITY); + return LIBUSB_ERROR_INVALID_PARAM; + } + if (dev_cap->bLength < LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE) { + usbi_err(ctx, "short dev-cap descriptor read %d/%d", + dev_cap->bLength, LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE); + return LIBUSB_ERROR_IO; + } + + _ss_usb_device_cap = malloc(sizeof(*_ss_usb_device_cap)); + if (!_ss_usb_device_cap) + return LIBUSB_ERROR_NO_MEM; + + usbi_parse_descriptor((unsigned char *)dev_cap, "bbbbwbbw", + _ss_usb_device_cap, host_endian); + + *ss_usb_device_cap = _ss_usb_device_cap; + return LIBUSB_SUCCESS; +} + +/** \ingroup libusb_desc + * Free a SuperSpeed USB Device Capability descriptor obtained from + * libusb_get_ss_usb_device_capability_descriptor(). + * It is safe to call this function with a NULL ss_usb_device_cap + * parameter, in which case the function simply returns. + * + * \param ss_usb_device_cap the USB 2.0 Extension descriptor to free + */ +void API_EXPORTED libusb_free_ss_usb_device_capability_descriptor( + struct libusb_ss_usb_device_capability_descriptor *ss_usb_device_cap) +{ + free(ss_usb_device_cap); +} + +/** \ingroup libusb_desc + * Get a Container ID descriptor + * + * \param ctx the context to operate on, or NULL for the default context + * \param dev_cap Device Capability descriptor with a bDevCapabilityType of + * \ref libusb_capability_type::LIBUSB_BT_CONTAINER_ID + * LIBUSB_BT_CONTAINER_ID + * \param container_id output location for the Container ID descriptor. + * Only valid if 0 was returned. Must be freed with + * libusb_free_container_id_descriptor() after use. + * \returns 0 on success + * \returns a LIBUSB_ERROR code on error + */ +int API_EXPORTED libusb_get_container_id_descriptor(struct libusb_context *ctx, + struct libusb_bos_dev_capability_descriptor *dev_cap, + struct libusb_container_id_descriptor **container_id) +{ + struct libusb_container_id_descriptor *_container_id; + const int host_endian = 0; + + if (dev_cap->bDevCapabilityType != LIBUSB_BT_CONTAINER_ID) { + usbi_err(ctx, "unexpected bDevCapabilityType %x (expected %x)", + dev_cap->bDevCapabilityType, + LIBUSB_BT_CONTAINER_ID); + return LIBUSB_ERROR_INVALID_PARAM; + } + if (dev_cap->bLength < LIBUSB_BT_CONTAINER_ID_SIZE) { + usbi_err(ctx, "short dev-cap descriptor read %d/%d", + dev_cap->bLength, LIBUSB_BT_CONTAINER_ID_SIZE); + return LIBUSB_ERROR_IO; + } + + _container_id = malloc(sizeof(*_container_id)); + if (!_container_id) + return LIBUSB_ERROR_NO_MEM; + + usbi_parse_descriptor((unsigned char *)dev_cap, "bbbbu", + _container_id, host_endian); + + *container_id = _container_id; + return LIBUSB_SUCCESS; +} + +/** \ingroup libusb_desc + * Free a Container ID descriptor obtained from + * libusb_get_container_id_descriptor(). + * It is safe to call this function with a NULL container_id parameter, + * in which case the function simply returns. + * + * \param container_id the USB 2.0 Extension descriptor to free + */ +void API_EXPORTED libusb_free_container_id_descriptor( + struct libusb_container_id_descriptor *container_id) +{ + free(container_id); +} + +/** \ingroup libusb_desc + * Retrieve a string descriptor in C style ASCII. + * + * Wrapper around libusb_get_string_descriptor(). Uses the first language + * supported by the device. + * + * \param dev_handle a device handle + * \param desc_index the index of the descriptor to retrieve + * \param data output buffer for ASCII string descriptor + * \param length size of data buffer + * \returns number of bytes returned in data, or LIBUSB_ERROR code on failure + */ +int API_EXPORTED libusb_get_string_descriptor_ascii(libusb_device_handle *dev_handle, + uint8_t desc_index, unsigned char *data, int length) +{ + unsigned char tbuf[255]; /* Some devices choke on size > 255 */ + int r, si, di; + uint16_t langid; + + /* Asking for the zero'th index is special - it returns a string + * descriptor that contains all the language IDs supported by the + * device. Typically there aren't many - often only one. Language + * IDs are 16 bit numbers, and they start at the third byte in the + * descriptor. There's also no point in trying to read descriptor 0 + * with this function. See USB 2.0 specification section 9.6.7 for + * more information. + */ + + if (desc_index == 0) + return LIBUSB_ERROR_INVALID_PARAM; + + r = libusb_get_string_descriptor(dev_handle, 0, 0, tbuf, sizeof(tbuf)); + if (r < 0) + return r; + + if (r < 4) + return LIBUSB_ERROR_IO; + + langid = tbuf[2] | (tbuf[3] << 8); + + r = libusb_get_string_descriptor(dev_handle, desc_index, langid, tbuf, + sizeof(tbuf)); + if (r < 0) + return r; + + if (tbuf[1] != LIBUSB_DT_STRING) + return LIBUSB_ERROR_IO; + + if (tbuf[0] > r) + return LIBUSB_ERROR_IO; + + for (di = 0, si = 2; si < tbuf[0]; si += 2) { + if (di >= (length - 1)) + break; + + if ((tbuf[si] & 0x80) || (tbuf[si + 1])) /* non-ASCII */ + data[di++] = '?'; + else + data[di++] = tbuf[si]; + } + + data[di] = 0; + return di; +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/hotplug.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/hotplug.c new file mode 100644 index 000000000..bbfd6e79a --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/hotplug.c @@ -0,0 +1,350 @@ +/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ +/* + * Hotplug functions for libusb + * Copyright © 2012-2013 Nathan Hjelm + * Copyright © 2012-2013 Peter Stuge + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include +#ifdef HAVE_SYS_TYPES_H +#include +#endif +#include + +#include "libusbi.h" +#include "hotplug.h" + +/** + * @defgroup libusb_hotplug Device hotplug event notification + * This page details how to use the libusb hotplug interface, where available. + * + * Be mindful that not all platforms currently implement hotplug notification and + * that you should first call on \ref libusb_has_capability() with parameter + * \ref LIBUSB_CAP_HAS_HOTPLUG to confirm that hotplug support is available. + * + * \page libusb_hotplug Device hotplug event notification + * + * \section hotplug_intro Introduction + * + * Version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102, has added support + * for hotplug events on some platforms (you should test if your platform + * supports hotplug notification by calling \ref libusb_has_capability() with + * parameter \ref LIBUSB_CAP_HAS_HOTPLUG). + * + * This interface allows you to request notification for the arrival and departure + * of matching USB devices. + * + * To receive hotplug notification you register a callback by calling + * \ref libusb_hotplug_register_callback(). This function will optionally return + * a callback handle that can be passed to \ref libusb_hotplug_deregister_callback(). + * + * A callback function must return an int (0 or 1) indicating whether the callback is + * expecting additional events. Returning 0 will rearm the callback and 1 will cause + * the callback to be deregistered. Note that when callbacks are called from + * libusb_hotplug_register_callback() because of the \ref LIBUSB_HOTPLUG_ENUMERATE + * flag, the callback return value is ignored, iow you cannot cause a callback + * to be deregistered by returning 1 when it is called from + * libusb_hotplug_register_callback(). + * + * Callbacks for a particular context are automatically deregistered by libusb_exit(). + * + * As of 1.0.16 there are two supported hotplug events: + * - LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED: A device has arrived and is ready to use + * - LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT: A device has left and is no longer available + * + * A hotplug event can listen for either or both of these events. + * + * Note: If you receive notification that a device has left and you have any + * a libusb_device_handles for the device it is up to you to call libusb_close() + * on each device handle to free up any remaining resources associated with the device. + * Once a device has left any libusb_device_handle associated with the device + * are invalid and will remain so even if the device comes back. + * + * When handling a LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED event it is considered + * safe to call any libusb function that takes a libusb_device. It also safe to + * open a device and submit asynchronous transfers. However, most other functions + * that take a libusb_device_handle are not safe to call. Examples of such + * functions are any of the \ref libusb_syncio "synchronous API" functions or the blocking + * functions that retrieve various \ref libusb_desc "USB descriptors". These functions must + * be used outside of the context of the hotplug callback. + * + * When handling a LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT event the only safe function + * is libusb_get_device_descriptor(). + * + * The following code provides an example of the usage of the hotplug interface: +\code +#include +#include +#include +#include + +static int count = 0; + +int hotplug_callback(struct libusb_context *ctx, struct libusb_device *dev, + libusb_hotplug_event event, void *user_data) { + static libusb_device_handle *dev_handle = NULL; + struct libusb_device_descriptor desc; + int rc; + + (void)libusb_get_device_descriptor(dev, &desc); + + if (LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED == event) { + rc = libusb_open(dev, &dev_handle); + if (LIBUSB_SUCCESS != rc) { + printf("Could not open USB device\n"); + } + } else if (LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT == event) { + if (dev_handle) { + libusb_close(dev_handle); + dev_handle = NULL; + } + } else { + printf("Unhandled event %d\n", event); + } + count++; + + return 0; +} + +int main (void) { + libusb_hotplug_callback_handle callback_handle; + int rc; + + libusb_init(NULL); + + rc = libusb_hotplug_register_callback(NULL, LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED | + LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT, 0, 0x045a, 0x5005, + LIBUSB_HOTPLUG_MATCH_ANY, hotplug_callback, NULL, + &callback_handle); + if (LIBUSB_SUCCESS != rc) { + printf("Error creating a hotplug callback\n"); + libusb_exit(NULL); + return EXIT_FAILURE; + } + + while (count < 2) { + libusb_handle_events_completed(NULL, NULL); + nanosleep(&(struct timespec){0, 10000000UL}, NULL); + } + + libusb_hotplug_deregister_callback(NULL, callback_handle); + libusb_exit(NULL); + + return 0; +} +\endcode + */ + +static int usbi_hotplug_match_cb (struct libusb_context *ctx, + struct libusb_device *dev, libusb_hotplug_event event, + struct libusb_hotplug_callback *hotplug_cb) +{ + /* Handle lazy deregistration of callback */ + if (hotplug_cb->needs_free) { + /* Free callback */ + return 1; + } + + if (!(hotplug_cb->events & event)) { + return 0; + } + + if (LIBUSB_HOTPLUG_MATCH_ANY != hotplug_cb->vendor_id && + hotplug_cb->vendor_id != dev->device_descriptor.idVendor) { + return 0; + } + + if (LIBUSB_HOTPLUG_MATCH_ANY != hotplug_cb->product_id && + hotplug_cb->product_id != dev->device_descriptor.idProduct) { + return 0; + } + + if (LIBUSB_HOTPLUG_MATCH_ANY != hotplug_cb->dev_class && + hotplug_cb->dev_class != dev->device_descriptor.bDeviceClass) { + return 0; + } + + return hotplug_cb->cb (ctx, dev, event, hotplug_cb->user_data); +} + +void usbi_hotplug_match(struct libusb_context *ctx, struct libusb_device *dev, + libusb_hotplug_event event) +{ + struct libusb_hotplug_callback *hotplug_cb, *next; + int ret; + + usbi_mutex_lock(&ctx->hotplug_cbs_lock); + + list_for_each_entry_safe(hotplug_cb, next, &ctx->hotplug_cbs, list, struct libusb_hotplug_callback) { + usbi_mutex_unlock(&ctx->hotplug_cbs_lock); + ret = usbi_hotplug_match_cb (ctx, dev, event, hotplug_cb); + usbi_mutex_lock(&ctx->hotplug_cbs_lock); + + if (ret) { + list_del(&hotplug_cb->list); + free(hotplug_cb); + } + } + + usbi_mutex_unlock(&ctx->hotplug_cbs_lock); + + /* the backend is expected to call the callback for each active transfer */ +} + +void usbi_hotplug_notification(struct libusb_context *ctx, struct libusb_device *dev, + libusb_hotplug_event event) +{ + int pending_events; + libusb_hotplug_message *message = calloc(1, sizeof(*message)); + + if (!message) { + usbi_err(ctx, "error allocating hotplug message"); + return; + } + + message->event = event; + message->device = dev; + + /* Take the event data lock and add this message to the list. + * Only signal an event if there are no prior pending events. */ + usbi_mutex_lock(&ctx->event_data_lock); + pending_events = usbi_pending_events(ctx); + list_add_tail(&message->list, &ctx->hotplug_msgs); + if (!pending_events) + usbi_signal_event(ctx); + usbi_mutex_unlock(&ctx->event_data_lock); +} + +int API_EXPORTED libusb_hotplug_register_callback(libusb_context *ctx, + libusb_hotplug_event events, libusb_hotplug_flag flags, + int vendor_id, int product_id, int dev_class, + libusb_hotplug_callback_fn cb_fn, void *user_data, + libusb_hotplug_callback_handle *callback_handle) +{ + libusb_hotplug_callback *new_callback; + static int handle_id = 1; + + /* check for hotplug support */ + if (!libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { + return LIBUSB_ERROR_NOT_SUPPORTED; + } + + /* check for sane values */ + if ((LIBUSB_HOTPLUG_MATCH_ANY != vendor_id && (~0xffff & vendor_id)) || + (LIBUSB_HOTPLUG_MATCH_ANY != product_id && (~0xffff & product_id)) || + (LIBUSB_HOTPLUG_MATCH_ANY != dev_class && (~0xff & dev_class)) || + !cb_fn) { + return LIBUSB_ERROR_INVALID_PARAM; + } + + USBI_GET_CONTEXT(ctx); + + new_callback = (libusb_hotplug_callback *)calloc(1, sizeof (*new_callback)); + if (!new_callback) { + return LIBUSB_ERROR_NO_MEM; + } + + new_callback->ctx = ctx; + new_callback->vendor_id = vendor_id; + new_callback->product_id = product_id; + new_callback->dev_class = dev_class; + new_callback->flags = flags; + new_callback->events = events; + new_callback->cb = cb_fn; + new_callback->user_data = user_data; + new_callback->needs_free = 0; + + usbi_mutex_lock(&ctx->hotplug_cbs_lock); + + /* protect the handle by the context hotplug lock. it doesn't matter if the same handle + * is used for different contexts only that the handle is unique for this context */ + new_callback->handle = handle_id++; + + list_add(&new_callback->list, &ctx->hotplug_cbs); + + usbi_mutex_unlock(&ctx->hotplug_cbs_lock); + + + if (flags & LIBUSB_HOTPLUG_ENUMERATE) { + int i, len; + struct libusb_device **devs; + + len = (int) libusb_get_device_list(ctx, &devs); + if (len < 0) { + libusb_hotplug_deregister_callback(ctx, + new_callback->handle); + return len; + } + + for (i = 0; i < len; i++) { + usbi_hotplug_match_cb(ctx, devs[i], + LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED, + new_callback); + } + + libusb_free_device_list(devs, 1); + } + + + if (callback_handle) + *callback_handle = new_callback->handle; + + return LIBUSB_SUCCESS; +} + +void API_EXPORTED libusb_hotplug_deregister_callback (struct libusb_context *ctx, + libusb_hotplug_callback_handle callback_handle) +{ + struct libusb_hotplug_callback *hotplug_cb; + + /* check for hotplug support */ + if (!libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { + return; + } + + USBI_GET_CONTEXT(ctx); + + usbi_mutex_lock(&ctx->hotplug_cbs_lock); + list_for_each_entry(hotplug_cb, &ctx->hotplug_cbs, list, + struct libusb_hotplug_callback) { + if (callback_handle == hotplug_cb->handle) { + /* Mark this callback for deregistration */ + hotplug_cb->needs_free = 1; + } + } + usbi_mutex_unlock(&ctx->hotplug_cbs_lock); + + usbi_hotplug_notification(ctx, NULL, 0); +} + +void usbi_hotplug_deregister_all(struct libusb_context *ctx) { + struct libusb_hotplug_callback *hotplug_cb, *next; + + usbi_mutex_lock(&ctx->hotplug_cbs_lock); + list_for_each_entry_safe(hotplug_cb, next, &ctx->hotplug_cbs, list, + struct libusb_hotplug_callback) { + list_del(&hotplug_cb->list); + free(hotplug_cb); + } + + usbi_mutex_unlock(&ctx->hotplug_cbs_lock); +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/hotplug.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/hotplug.h new file mode 100644 index 000000000..2bec81b06 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/hotplug.h @@ -0,0 +1,90 @@ +/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ +/* + * Hotplug support for libusb + * Copyright © 2012-2013 Nathan Hjelm + * Copyright © 2012-2013 Peter Stuge + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#if !defined(USBI_HOTPLUG_H) +#define USBI_HOTPLUG_H + +#ifndef LIBUSBI_H +#include "libusbi.h" +#endif + +/** \ingroup hotplug + * The hotplug callback structure. The user populates this structure with + * libusb_hotplug_prepare_callback() and then calls libusb_hotplug_register_callback() + * to receive notification of hotplug events. + */ +struct libusb_hotplug_callback { + /** Context this callback is associated with */ + struct libusb_context *ctx; + + /** Vendor ID to match or LIBUSB_HOTPLUG_MATCH_ANY */ + int vendor_id; + + /** Product ID to match or LIBUSB_HOTPLUG_MATCH_ANY */ + int product_id; + + /** Device class to match or LIBUSB_HOTPLUG_MATCH_ANY */ + int dev_class; + + /** Hotplug callback flags */ + libusb_hotplug_flag flags; + + /** Event(s) that will trigger this callback */ + libusb_hotplug_event events; + + /** Callback function to invoke for matching event/device */ + libusb_hotplug_callback_fn cb; + + /** Handle for this callback (used to match on deregister) */ + libusb_hotplug_callback_handle handle; + + /** User data that will be passed to the callback function */ + void *user_data; + + /** Callback is marked for deletion */ + int needs_free; + + /** List this callback is registered in (ctx->hotplug_cbs) */ + struct list_head list; +}; + +typedef struct libusb_hotplug_callback libusb_hotplug_callback; + +struct libusb_hotplug_message { + /** The hotplug event that occurred */ + libusb_hotplug_event event; + + /** The device for which this hotplug event occurred */ + struct libusb_device *device; + + /** List this message is contained in (ctx->hotplug_msgs) */ + struct list_head list; +}; + +typedef struct libusb_hotplug_message libusb_hotplug_message; + +void usbi_hotplug_deregister_all(struct libusb_context *ctx); +void usbi_hotplug_match(struct libusb_context *ctx, struct libusb_device *dev, + libusb_hotplug_event event); +void usbi_hotplug_notification(struct libusb_context *ctx, struct libusb_device *dev, + libusb_hotplug_event event); + +#endif diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/io.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/io.c new file mode 100644 index 000000000..eb1eabf1c --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/io.c @@ -0,0 +1,2819 @@ +/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ +/* + * I/O functions for libusb + * Copyright © 2007-2009 Daniel Drake + * Copyright © 2001 Johannes Erdfelt + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include +#include +#include +#ifdef HAVE_SYS_TIME_H +#include +#endif +#ifdef USBI_TIMERFD_AVAILABLE +#include +#endif + +#include "libusbi.h" +#include "hotplug.h" + +/** + * \page libusb_io Synchronous and asynchronous device I/O + * + * \section io_intro Introduction + * + * If you're using libusb in your application, you're probably wanting to + * perform I/O with devices - you want to perform USB data transfers. + * + * libusb offers two separate interfaces for device I/O. This page aims to + * introduce the two in order to help you decide which one is more suitable + * for your application. You can also choose to use both interfaces in your + * application by considering each transfer on a case-by-case basis. + * + * Once you have read through the following discussion, you should consult the + * detailed API documentation pages for the details: + * - \ref libusb_syncio + * - \ref libusb_asyncio + * + * \section theory Transfers at a logical level + * + * At a logical level, USB transfers typically happen in two parts. For + * example, when reading data from a endpoint: + * -# A request for data is sent to the device + * -# Some time later, the incoming data is received by the host + * + * or when writing data to an endpoint: + * + * -# The data is sent to the device + * -# Some time later, the host receives acknowledgement from the device that + * the data has been transferred. + * + * There may be an indefinite delay between the two steps. Consider a + * fictional USB input device with a button that the user can press. In order + * to determine when the button is pressed, you would likely submit a request + * to read data on a bulk or interrupt endpoint and wait for data to arrive. + * Data will arrive when the button is pressed by the user, which is + * potentially hours later. + * + * libusb offers both a synchronous and an asynchronous interface to performing + * USB transfers. The main difference is that the synchronous interface + * combines both steps indicated above into a single function call, whereas + * the asynchronous interface separates them. + * + * \section sync The synchronous interface + * + * The synchronous I/O interface allows you to perform a USB transfer with + * a single function call. When the function call returns, the transfer has + * completed and you can parse the results. + * + * If you have used the libusb-0.1 before, this I/O style will seem familar to + * you. libusb-0.1 only offered a synchronous interface. + * + * In our input device example, to read button presses you might write code + * in the following style: +\code +unsigned char data[4]; +int actual_length; +int r = libusb_bulk_transfer(dev_handle, LIBUSB_ENDPOINT_IN, data, sizeof(data), &actual_length, 0); +if (r == 0 && actual_length == sizeof(data)) { + // results of the transaction can now be found in the data buffer + // parse them here and report button press +} else { + error(); +} +\endcode + * + * The main advantage of this model is simplicity: you did everything with + * a single simple function call. + * + * However, this interface has its limitations. Your application will sleep + * inside libusb_bulk_transfer() until the transaction has completed. If it + * takes the user 3 hours to press the button, your application will be + * sleeping for that long. Execution will be tied up inside the library - + * the entire thread will be useless for that duration. + * + * Another issue is that by tieing up the thread with that single transaction + * there is no possibility of performing I/O with multiple endpoints and/or + * multiple devices simultaneously, unless you resort to creating one thread + * per transaction. + * + * Additionally, there is no opportunity to cancel the transfer after the + * request has been submitted. + * + * For details on how to use the synchronous API, see the + * \ref libusb_syncio "synchronous I/O API documentation" pages. + * + * \section async The asynchronous interface + * + * Asynchronous I/O is the most significant new feature in libusb-1.0. + * Although it is a more complex interface, it solves all the issues detailed + * above. + * + * Instead of providing which functions that block until the I/O has complete, + * libusb's asynchronous interface presents non-blocking functions which + * begin a transfer and then return immediately. Your application passes a + * callback function pointer to this non-blocking function, which libusb will + * call with the results of the transaction when it has completed. + * + * Transfers which have been submitted through the non-blocking functions + * can be cancelled with a separate function call. + * + * The non-blocking nature of this interface allows you to be simultaneously + * performing I/O to multiple endpoints on multiple devices, without having + * to use threads. + * + * This added flexibility does come with some complications though: + * - In the interest of being a lightweight library, libusb does not create + * threads and can only operate when your application is calling into it. Your + * application must call into libusb from it's main loop when events are ready + * to be handled, or you must use some other scheme to allow libusb to + * undertake whatever work needs to be done. + * - libusb also needs to be called into at certain fixed points in time in + * order to accurately handle transfer timeouts. + * - Memory handling becomes more complex. You cannot use stack memory unless + * the function with that stack is guaranteed not to return until the transfer + * callback has finished executing. + * - You generally lose some linearity from your code flow because submitting + * the transfer request is done in a separate function from where the transfer + * results are handled. This becomes particularly obvious when you want to + * submit a second transfer based on the results of an earlier transfer. + * + * Internally, libusb's synchronous interface is expressed in terms of function + * calls to the asynchronous interface. + * + * For details on how to use the asynchronous API, see the + * \ref libusb_asyncio "asynchronous I/O API" documentation pages. + */ + + +/** + * \page libusb_packetoverflow Packets and overflows + * + * \section packets Packet abstraction + * + * The USB specifications describe how data is transmitted in packets, with + * constraints on packet size defined by endpoint descriptors. The host must + * not send data payloads larger than the endpoint's maximum packet size. + * + * libusb and the underlying OS abstract out the packet concept, allowing you + * to request transfers of any size. Internally, the request will be divided + * up into correctly-sized packets. You do not have to be concerned with + * packet sizes, but there is one exception when considering overflows. + * + * \section overflow Bulk/interrupt transfer overflows + * + * When requesting data on a bulk endpoint, libusb requires you to supply a + * buffer and the maximum number of bytes of data that libusb can put in that + * buffer. However, the size of the buffer is not communicated to the device - + * the device is just asked to send any amount of data. + * + * There is no problem if the device sends an amount of data that is less than + * or equal to the buffer size. libusb reports this condition to you through + * the \ref libusb_transfer::actual_length "libusb_transfer.actual_length" + * field. + * + * Problems may occur if the device attempts to send more data than can fit in + * the buffer. libusb reports LIBUSB_TRANSFER_OVERFLOW for this condition but + * other behaviour is largely undefined: actual_length may or may not be + * accurate, the chunk of data that can fit in the buffer (before overflow) + * may or may not have been transferred. + * + * Overflows are nasty, but can be avoided. Even though you were told to + * ignore packets above, think about the lower level details: each transfer is + * split into packets (typically small, with a maximum size of 512 bytes). + * Overflows can only happen if the final packet in an incoming data transfer + * is smaller than the actual packet that the device wants to transfer. + * Therefore, you will never see an overflow if your transfer buffer size is a + * multiple of the endpoint's packet size: the final packet will either + * fill up completely or will be only partially filled. + */ + +/** + * @defgroup libusb_asyncio Asynchronous device I/O + * + * This page details libusb's asynchronous (non-blocking) API for USB device + * I/O. This interface is very powerful but is also quite complex - you will + * need to read this page carefully to understand the necessary considerations + * and issues surrounding use of this interface. Simplistic applications + * may wish to consider the \ref libusb_syncio "synchronous I/O API" instead. + * + * The asynchronous interface is built around the idea of separating transfer + * submission and handling of transfer completion (the synchronous model + * combines both of these into one). There may be a long delay between + * submission and completion, however the asynchronous submission function + * is non-blocking so will return control to your application during that + * potentially long delay. + * + * \section asyncabstraction Transfer abstraction + * + * For the asynchronous I/O, libusb implements the concept of a generic + * transfer entity for all types of I/O (control, bulk, interrupt, + * isochronous). The generic transfer object must be treated slightly + * differently depending on which type of I/O you are performing with it. + * + * This is represented by the public libusb_transfer structure type. + * + * \section asynctrf Asynchronous transfers + * + * We can view asynchronous I/O as a 5 step process: + * -# Allocation: allocate a libusb_transfer + * -# Filling: populate the libusb_transfer instance with information + * about the transfer you wish to perform + * -# Submission: ask libusb to submit the transfer + * -# Completion handling: examine transfer results in the + * libusb_transfer structure + * -# Deallocation: clean up resources + * + * + * \subsection asyncalloc Allocation + * + * This step involves allocating memory for a USB transfer. This is the + * generic transfer object mentioned above. At this stage, the transfer + * is "blank" with no details about what type of I/O it will be used for. + * + * Allocation is done with the libusb_alloc_transfer() function. You must use + * this function rather than allocating your own transfers. + * + * \subsection asyncfill Filling + * + * This step is where you take a previously allocated transfer and fill it + * with information to determine the message type and direction, data buffer, + * callback function, etc. + * + * You can either fill the required fields yourself or you can use the + * helper functions: libusb_fill_control_transfer(), libusb_fill_bulk_transfer() + * and libusb_fill_interrupt_transfer(). + * + * \subsection asyncsubmit Submission + * + * When you have allocated a transfer and filled it, you can submit it using + * libusb_submit_transfer(). This function returns immediately but can be + * regarded as firing off the I/O request in the background. + * + * \subsection asynccomplete Completion handling + * + * After a transfer has been submitted, one of four things can happen to it: + * + * - The transfer completes (i.e. some data was transferred) + * - The transfer has a timeout and the timeout expires before all data is + * transferred + * - The transfer fails due to an error + * - The transfer is cancelled + * + * Each of these will cause the user-specified transfer callback function to + * be invoked. It is up to the callback function to determine which of the + * above actually happened and to act accordingly. + * + * The user-specified callback is passed a pointer to the libusb_transfer + * structure which was used to setup and submit the transfer. At completion + * time, libusb has populated this structure with results of the transfer: + * success or failure reason, number of bytes of data transferred, etc. See + * the libusb_transfer structure documentation for more information. + * + * Important Note: The user-specified callback is called from an event + * handling context. It is therefore important that no calls are made into + * libusb that will attempt to perform any event handling. Examples of such + * functions are any listed in the \ref libusb_syncio "synchronous API" and any of + * the blocking functions that retrieve \ref libusb_desc "USB descriptors". + * + * \subsection Deallocation + * + * When a transfer has completed (i.e. the callback function has been invoked), + * you are advised to free the transfer (unless you wish to resubmit it, see + * below). Transfers are deallocated with libusb_free_transfer(). + * + * It is undefined behaviour to free a transfer which has not completed. + * + * \section asyncresubmit Resubmission + * + * You may be wondering why allocation, filling, and submission are all + * separated above where they could reasonably be combined into a single + * operation. + * + * The reason for separation is to allow you to resubmit transfers without + * having to allocate new ones every time. This is especially useful for + * common situations dealing with interrupt endpoints - you allocate one + * transfer, fill and submit it, and when it returns with results you just + * resubmit it for the next interrupt. + * + * \section asynccancel Cancellation + * + * Another advantage of using the asynchronous interface is that you have + * the ability to cancel transfers which have not yet completed. This is + * done by calling the libusb_cancel_transfer() function. + * + * libusb_cancel_transfer() is asynchronous/non-blocking in itself. When the + * cancellation actually completes, the transfer's callback function will + * be invoked, and the callback function should check the transfer status to + * determine that it was cancelled. + * + * Freeing the transfer after it has been cancelled but before cancellation + * has completed will result in undefined behaviour. + * + * When a transfer is cancelled, some of the data may have been transferred. + * libusb will communicate this to you in the transfer callback. Do not assume + * that no data was transferred. + * + * \section bulk_overflows Overflows on device-to-host bulk/interrupt endpoints + * + * If your device does not have predictable transfer sizes (or it misbehaves), + * your application may submit a request for data on an IN endpoint which is + * smaller than the data that the device wishes to send. In some circumstances + * this will cause an overflow, which is a nasty condition to deal with. See + * the \ref libusb_packetoverflow page for discussion. + * + * \section asyncctrl Considerations for control transfers + * + * The libusb_transfer structure is generic and hence does not + * include specific fields for the control-specific setup packet structure. + * + * In order to perform a control transfer, you must place the 8-byte setup + * packet at the start of the data buffer. To simplify this, you could + * cast the buffer pointer to type struct libusb_control_setup, or you can + * use the helper function libusb_fill_control_setup(). + * + * The wLength field placed in the setup packet must be the length you would + * expect to be sent in the setup packet: the length of the payload that + * follows (or the expected maximum number of bytes to receive). However, + * the length field of the libusb_transfer object must be the length of + * the data buffer - i.e. it should be wLength plus the size of + * the setup packet (LIBUSB_CONTROL_SETUP_SIZE). + * + * If you use the helper functions, this is simplified for you: + * -# Allocate a buffer of size LIBUSB_CONTROL_SETUP_SIZE plus the size of the + * data you are sending/requesting. + * -# Call libusb_fill_control_setup() on the data buffer, using the transfer + * request size as the wLength value (i.e. do not include the extra space you + * allocated for the control setup). + * -# If this is a host-to-device transfer, place the data to be transferred + * in the data buffer, starting at offset LIBUSB_CONTROL_SETUP_SIZE. + * -# Call libusb_fill_control_transfer() to associate the data buffer with + * the transfer (and to set the remaining details such as callback and timeout). + * - Note that there is no parameter to set the length field of the transfer. + * The length is automatically inferred from the wLength field of the setup + * packet. + * -# Submit the transfer. + * + * The multi-byte control setup fields (wValue, wIndex and wLength) must + * be given in little-endian byte order (the endianness of the USB bus). + * Endianness conversion is transparently handled by + * libusb_fill_control_setup() which is documented to accept host-endian + * values. + * + * Further considerations are needed when handling transfer completion in + * your callback function: + * - As you might expect, the setup packet will still be sitting at the start + * of the data buffer. + * - If this was a device-to-host transfer, the received data will be sitting + * at offset LIBUSB_CONTROL_SETUP_SIZE into the buffer. + * - The actual_length field of the transfer structure is relative to the + * wLength of the setup packet, rather than the size of the data buffer. So, + * if your wLength was 4, your transfer's length was 12, then you + * should expect an actual_length of 4 to indicate that the data was + * transferred in entirity. + * + * To simplify parsing of setup packets and obtaining the data from the + * correct offset, you may wish to use the libusb_control_transfer_get_data() + * and libusb_control_transfer_get_setup() functions within your transfer + * callback. + * + * Even though control endpoints do not halt, a completed control transfer + * may have a LIBUSB_TRANSFER_STALL status code. This indicates the control + * request was not supported. + * + * \section asyncintr Considerations for interrupt transfers + * + * All interrupt transfers are performed using the polling interval presented + * by the bInterval value of the endpoint descriptor. + * + * \section asynciso Considerations for isochronous transfers + * + * Isochronous transfers are more complicated than transfers to + * non-isochronous endpoints. + * + * To perform I/O to an isochronous endpoint, allocate the transfer by calling + * libusb_alloc_transfer() with an appropriate number of isochronous packets. + * + * During filling, set \ref libusb_transfer::type "type" to + * \ref libusb_transfer_type::LIBUSB_TRANSFER_TYPE_ISOCHRONOUS + * "LIBUSB_TRANSFER_TYPE_ISOCHRONOUS", and set + * \ref libusb_transfer::num_iso_packets "num_iso_packets" to a value less than + * or equal to the number of packets you requested during allocation. + * libusb_alloc_transfer() does not set either of these fields for you, given + * that you might not even use the transfer on an isochronous endpoint. + * + * Next, populate the length field for the first num_iso_packets entries in + * the \ref libusb_transfer::iso_packet_desc "iso_packet_desc" array. Section + * 5.6.3 of the USB2 specifications describe how the maximum isochronous + * packet length is determined by the wMaxPacketSize field in the endpoint + * descriptor. + * Two functions can help you here: + * + * - libusb_get_max_iso_packet_size() is an easy way to determine the max + * packet size for an isochronous endpoint. Note that the maximum packet + * size is actually the maximum number of bytes that can be transmitted in + * a single microframe, therefore this function multiplies the maximum number + * of bytes per transaction by the number of transaction opportunities per + * microframe. + * - libusb_set_iso_packet_lengths() assigns the same length to all packets + * within a transfer, which is usually what you want. + * + * For outgoing transfers, you'll obviously fill the buffer and populate the + * packet descriptors in hope that all the data gets transferred. For incoming + * transfers, you must ensure the buffer has sufficient capacity for + * the situation where all packets transfer the full amount of requested data. + * + * Completion handling requires some extra consideration. The + * \ref libusb_transfer::actual_length "actual_length" field of the transfer + * is meaningless and should not be examined; instead you must refer to the + * \ref libusb_iso_packet_descriptor::actual_length "actual_length" field of + * each individual packet. + * + * The \ref libusb_transfer::status "status" field of the transfer is also a + * little misleading: + * - If the packets were submitted and the isochronous data microframes + * completed normally, status will have value + * \ref libusb_transfer_status::LIBUSB_TRANSFER_COMPLETED + * "LIBUSB_TRANSFER_COMPLETED". Note that bus errors and software-incurred + * delays are not counted as transfer errors; the transfer.status field may + * indicate COMPLETED even if some or all of the packets failed. Refer to + * the \ref libusb_iso_packet_descriptor::status "status" field of each + * individual packet to determine packet failures. + * - The status field will have value + * \ref libusb_transfer_status::LIBUSB_TRANSFER_ERROR + * "LIBUSB_TRANSFER_ERROR" only when serious errors were encountered. + * - Other transfer status codes occur with normal behaviour. + * + * The data for each packet will be found at an offset into the buffer that + * can be calculated as if each prior packet completed in full. The + * libusb_get_iso_packet_buffer() and libusb_get_iso_packet_buffer_simple() + * functions may help you here. + * + * Note: Some operating systems (e.g. Linux) may impose limits on the + * length of individual isochronous packets and/or the total length of the + * isochronous transfer. Such limits can be difficult for libusb to detect, + * so the library will simply try and submit the transfer as set up by you. + * If the transfer fails to submit because it is too large, + * libusb_submit_transfer() will return + * \ref libusb_error::LIBUSB_ERROR_INVALID_PARAM "LIBUSB_ERROR_INVALID_PARAM". + * + * \section asyncmem Memory caveats + * + * In most circumstances, it is not safe to use stack memory for transfer + * buffers. This is because the function that fired off the asynchronous + * transfer may return before libusb has finished using the buffer, and when + * the function returns it's stack gets destroyed. This is true for both + * host-to-device and device-to-host transfers. + * + * The only case in which it is safe to use stack memory is where you can + * guarantee that the function owning the stack space for the buffer does not + * return until after the transfer's callback function has completed. In every + * other case, you need to use heap memory instead. + * + * \section asyncflags Fine control + * + * Through using this asynchronous interface, you may find yourself repeating + * a few simple operations many times. You can apply a bitwise OR of certain + * flags to a transfer to simplify certain things: + * - \ref libusb_transfer_flags::LIBUSB_TRANSFER_SHORT_NOT_OK + * "LIBUSB_TRANSFER_SHORT_NOT_OK" results in transfers which transferred + * less than the requested amount of data being marked with status + * \ref libusb_transfer_status::LIBUSB_TRANSFER_ERROR "LIBUSB_TRANSFER_ERROR" + * (they would normally be regarded as COMPLETED) + * - \ref libusb_transfer_flags::LIBUSB_TRANSFER_FREE_BUFFER + * "LIBUSB_TRANSFER_FREE_BUFFER" allows you to ask libusb to free the transfer + * buffer when freeing the transfer. + * - \ref libusb_transfer_flags::LIBUSB_TRANSFER_FREE_TRANSFER + * "LIBUSB_TRANSFER_FREE_TRANSFER" causes libusb to automatically free the + * transfer after the transfer callback returns. + * + * \section asyncevent Event handling + * + * An asynchronous model requires that libusb perform work at various + * points in time - namely processing the results of previously-submitted + * transfers and invoking the user-supplied callback function. + * + * This gives rise to the libusb_handle_events() function which your + * application must call into when libusb has work do to. This gives libusb + * the opportunity to reap pending transfers, invoke callbacks, etc. + * + * There are 2 different approaches to dealing with libusb_handle_events: + * + * -# Repeatedly call libusb_handle_events() in blocking mode from a dedicated + * thread. + * -# Integrate libusb with your application's main event loop. libusb + * exposes a set of file descriptors which allow you to do this. + * + * The first approach has the big advantage that it will also work on Windows + * were libusb' poll API for select / poll integration is not available. So + * if you want to support Windows and use the async API, you must use this + * approach, see the \ref eventthread "Using an event handling thread" section + * below for details. + * + * If you prefer a single threaded approach with a single central event loop, + * see the \ref libusb_poll "polling and timing" section for how to integrate libusb + * into your application's main event loop. + * + * \section eventthread Using an event handling thread + * + * Lets begin with stating the obvious: If you're going to use a separate + * thread for libusb event handling, your callback functions MUST be + * threadsafe. + * + * Other then that doing event handling from a separate thread, is mostly + * simple. You can use an event thread function as follows: +\code +void *event_thread_func(void *ctx) +{ + while (event_thread_run) + libusb_handle_events(ctx); + + return NULL; +} +\endcode + * + * There is one caveat though, stopping this thread requires setting the + * event_thread_run variable to 0, and after that libusb_handle_events() needs + * to return control to event_thread_func. But unless some event happens, + * libusb_handle_events() will not return. + * + * There are 2 different ways of dealing with this, depending on if your + * application uses libusb' \ref libusb_hotplug "hotplug" support or not. + * + * Applications which do not use hotplug support, should not start the event + * thread until after their first call to libusb_open(), and should stop the + * thread when closing the last open device as follows: +\code +void my_close_handle(libusb_device_handle *dev_handle) +{ + if (open_devs == 1) + event_thread_run = 0; + + libusb_close(dev_handle); // This wakes up libusb_handle_events() + + if (open_devs == 1) + pthread_join(event_thread); + + open_devs--; +} +\endcode + * + * Applications using hotplug support should start the thread at program init, + * after having successfully called libusb_hotplug_register_callback(), and + * should stop the thread at program exit as follows: +\code +void my_libusb_exit(void) +{ + event_thread_run = 0; + libusb_hotplug_deregister_callback(ctx, hotplug_cb_handle); // This wakes up libusb_handle_events() + pthread_join(event_thread); + libusb_exit(ctx); +} +\endcode + */ + +/** + * @defgroup libusb_poll Polling and timing + * + * This page documents libusb's functions for polling events and timing. + * These functions are only necessary for users of the + * \ref libusb_asyncio "asynchronous API". If you are only using the simpler + * \ref libusb_syncio "synchronous API" then you do not need to ever call these + * functions. + * + * The justification for the functionality described here has already been + * discussed in the \ref asyncevent "event handling" section of the + * asynchronous API documentation. In summary, libusb does not create internal + * threads for event processing and hence relies on your application calling + * into libusb at certain points in time so that pending events can be handled. + * + * Your main loop is probably already calling poll() or select() or a + * variant on a set of file descriptors for other event sources (e.g. keyboard + * button presses, mouse movements, network sockets, etc). You then add + * libusb's file descriptors to your poll()/select() calls, and when activity + * is detected on such descriptors you know it is time to call + * libusb_handle_events(). + * + * There is one final event handling complication. libusb supports + * asynchronous transfers which time out after a specified time period. + * + * On some platforms a timerfd is used, so the timeout handling is just another + * fd, on other platforms this requires that libusb is called into at or after + * the timeout to handle it. So, in addition to considering libusb's file + * descriptors in your main event loop, you must also consider that libusb + * sometimes needs to be called into at fixed points in time even when there + * is no file descriptor activity, see \ref polltime details. + * + * In order to know precisely when libusb needs to be called into, libusb + * offers you a set of pollable file descriptors and information about when + * the next timeout expires. + * + * If you are using the asynchronous I/O API, you must take one of the two + * following options, otherwise your I/O will not complete. + * + * \section pollsimple The simple option + * + * If your application revolves solely around libusb and does not need to + * handle other event sources, you can have a program structure as follows: +\code +// initialize libusb +// find and open device +// maybe fire off some initial async I/O + +while (user_has_not_requested_exit) + libusb_handle_events(ctx); + +// clean up and exit +\endcode + * + * With such a simple main loop, you do not have to worry about managing + * sets of file descriptors or handling timeouts. libusb_handle_events() will + * handle those details internally. + * + * \section libusb_pollmain The more advanced option + * + * \note This functionality is currently only available on Unix-like platforms. + * On Windows, libusb_get_pollfds() simply returns NULL. Applications which + * want to support Windows are advised to use an \ref eventthread + * "event handling thread" instead. + * + * In more advanced applications, you will already have a main loop which + * is monitoring other event sources: network sockets, X11 events, mouse + * movements, etc. Through exposing a set of file descriptors, libusb is + * designed to cleanly integrate into such main loops. + * + * In addition to polling file descriptors for the other event sources, you + * take a set of file descriptors from libusb and monitor those too. When you + * detect activity on libusb's file descriptors, you call + * libusb_handle_events_timeout() in non-blocking mode. + * + * What's more, libusb may also need to handle events at specific moments in + * time. No file descriptor activity is generated at these times, so your + * own application needs to be continually aware of when the next one of these + * moments occurs (through calling libusb_get_next_timeout()), and then it + * needs to call libusb_handle_events_timeout() in non-blocking mode when + * these moments occur. This means that you need to adjust your + * poll()/select() timeout accordingly. + * + * libusb provides you with a set of file descriptors to poll and expects you + * to poll all of them, treating them as a single entity. The meaning of each + * file descriptor in the set is an internal implementation detail, + * platform-dependent and may vary from release to release. Don't try and + * interpret the meaning of the file descriptors, just do as libusb indicates, + * polling all of them at once. + * + * In pseudo-code, you want something that looks like: +\code +// initialise libusb + +libusb_get_pollfds(ctx) +while (user has not requested application exit) { + libusb_get_next_timeout(ctx); + poll(on libusb file descriptors plus any other event sources of interest, + using a timeout no larger than the value libusb just suggested) + if (poll() indicated activity on libusb file descriptors) + libusb_handle_events_timeout(ctx, &zero_tv); + if (time has elapsed to or beyond the libusb timeout) + libusb_handle_events_timeout(ctx, &zero_tv); + // handle events from other sources here +} + +// clean up and exit +\endcode + * + * \subsection polltime Notes on time-based events + * + * The above complication with having to track time and call into libusb at + * specific moments is a bit of a headache. For maximum compatibility, you do + * need to write your main loop as above, but you may decide that you can + * restrict the supported platforms of your application and get away with + * a more simplistic scheme. + * + * These time-based event complications are \b not required on the following + * platforms: + * - Darwin + * - Linux, provided that the following version requirements are satisfied: + * - Linux v2.6.27 or newer, compiled with timerfd support + * - glibc v2.9 or newer + * - libusb v1.0.5 or newer + * + * Under these configurations, libusb_get_next_timeout() will \em always return + * 0, so your main loop can be simplified to: +\code +// initialise libusb + +libusb_get_pollfds(ctx) +while (user has not requested application exit) { + poll(on libusb file descriptors plus any other event sources of interest, + using any timeout that you like) + if (poll() indicated activity on libusb file descriptors) + libusb_handle_events_timeout(ctx, &zero_tv); + // handle events from other sources here +} + +// clean up and exit +\endcode + * + * Do remember that if you simplify your main loop to the above, you will + * lose compatibility with some platforms (including legacy Linux platforms, + * and any future platforms supported by libusb which may have time-based + * event requirements). The resultant problems will likely appear as + * strange bugs in your application. + * + * You can use the libusb_pollfds_handle_timeouts() function to do a runtime + * check to see if it is safe to ignore the time-based event complications. + * If your application has taken the shortcut of ignoring libusb's next timeout + * in your main loop, then you are advised to check the return value of + * libusb_pollfds_handle_timeouts() during application startup, and to abort + * if the platform does suffer from these timing complications. + * + * \subsection fdsetchange Changes in the file descriptor set + * + * The set of file descriptors that libusb uses as event sources may change + * during the life of your application. Rather than having to repeatedly + * call libusb_get_pollfds(), you can set up notification functions for when + * the file descriptor set changes using libusb_set_pollfd_notifiers(). + * + * \subsection mtissues Multi-threaded considerations + * + * Unfortunately, the situation is complicated further when multiple threads + * come into play. If two threads are monitoring the same file descriptors, + * the fact that only one thread will be woken up when an event occurs causes + * some headaches. + * + * The events lock, event waiters lock, and libusb_handle_events_locked() + * entities are added to solve these problems. You do not need to be concerned + * with these entities otherwise. + * + * See the extra documentation: \ref libusb_mtasync + */ + +/** \page libusb_mtasync Multi-threaded applications and asynchronous I/O + * + * libusb is a thread-safe library, but extra considerations must be applied + * to applications which interact with libusb from multiple threads. + * + * The underlying issue that must be addressed is that all libusb I/O + * revolves around monitoring file descriptors through the poll()/select() + * system calls. This is directly exposed at the + * \ref libusb_asyncio "asynchronous interface" but it is important to note that the + * \ref libusb_syncio "synchronous interface" is implemented on top of the + * asynchonrous interface, therefore the same considerations apply. + * + * The issue is that if two or more threads are concurrently calling poll() + * or select() on libusb's file descriptors then only one of those threads + * will be woken up when an event arrives. The others will be completely + * oblivious that anything has happened. + * + * Consider the following pseudo-code, which submits an asynchronous transfer + * then waits for its completion. This style is one way you could implement a + * synchronous interface on top of the asynchronous interface (and libusb + * does something similar, albeit more advanced due to the complications + * explained on this page). + * +\code +void cb(struct libusb_transfer *transfer) +{ + int *completed = transfer->user_data; + *completed = 1; +} + +void myfunc() { + struct libusb_transfer *transfer; + unsigned char buffer[LIBUSB_CONTROL_SETUP_SIZE] __attribute__ ((aligned (2))); + int completed = 0; + + transfer = libusb_alloc_transfer(0); + libusb_fill_control_setup(buffer, + LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT, 0x04, 0x01, 0, 0); + libusb_fill_control_transfer(transfer, dev, buffer, cb, &completed, 1000); + libusb_submit_transfer(transfer); + + while (!completed) { + poll(libusb file descriptors, 120*1000); + if (poll indicates activity) + libusb_handle_events_timeout(ctx, &zero_tv); + } + printf("completed!"); + // other code here +} +\endcode + * + * Here we are serializing completion of an asynchronous event + * against a condition - the condition being completion of a specific transfer. + * The poll() loop has a long timeout to minimize CPU usage during situations + * when nothing is happening (it could reasonably be unlimited). + * + * If this is the only thread that is polling libusb's file descriptors, there + * is no problem: there is no danger that another thread will swallow up the + * event that we are interested in. On the other hand, if there is another + * thread polling the same descriptors, there is a chance that it will receive + * the event that we were interested in. In this situation, myfunc() + * will only realise that the transfer has completed on the next iteration of + * the loop, up to 120 seconds later. Clearly a two-minute delay is + * undesirable, and don't even think about using short timeouts to circumvent + * this issue! + * + * The solution here is to ensure that no two threads are ever polling the + * file descriptors at the same time. A naive implementation of this would + * impact the capabilities of the library, so libusb offers the scheme + * documented below to ensure no loss of functionality. + * + * Before we go any further, it is worth mentioning that all libusb-wrapped + * event handling procedures fully adhere to the scheme documented below. + * This includes libusb_handle_events() and its variants, and all the + * synchronous I/O functions - libusb hides this headache from you. + * + * \section Using libusb_handle_events() from multiple threads + * + * Even when only using libusb_handle_events() and synchronous I/O functions, + * you can still have a race condition. You might be tempted to solve the + * above with libusb_handle_events() like so: + * +\code + libusb_submit_transfer(transfer); + + while (!completed) { + libusb_handle_events(ctx); + } + printf("completed!"); +\endcode + * + * This however has a race between the checking of completed and + * libusb_handle_events() acquiring the events lock, so another thread + * could have completed the transfer, resulting in this thread hanging + * until either a timeout or another event occurs. See also commit + * 6696512aade99bb15d6792af90ae329af270eba6 which fixes this in the + * synchronous API implementation of libusb. + * + * Fixing this race requires checking the variable completed only after + * taking the event lock, which defeats the concept of just calling + * libusb_handle_events() without worrying about locking. This is why + * libusb-1.0.9 introduces the new libusb_handle_events_timeout_completed() + * and libusb_handle_events_completed() functions, which handles doing the + * completion check for you after they have acquired the lock: + * +\code + libusb_submit_transfer(transfer); + + while (!completed) { + libusb_handle_events_completed(ctx, &completed); + } + printf("completed!"); +\endcode + * + * This nicely fixes the race in our example. Note that if all you want to + * do is submit a single transfer and wait for its completion, then using + * one of the synchronous I/O functions is much easier. + * + * \section eventlock The events lock + * + * The problem is when we consider the fact that libusb exposes file + * descriptors to allow for you to integrate asynchronous USB I/O into + * existing main loops, effectively allowing you to do some work behind + * libusb's back. If you do take libusb's file descriptors and pass them to + * poll()/select() yourself, you need to be aware of the associated issues. + * + * The first concept to be introduced is the events lock. The events lock + * is used to serialize threads that want to handle events, such that only + * one thread is handling events at any one time. + * + * You must take the events lock before polling libusb file descriptors, + * using libusb_lock_events(). You must release the lock as soon as you have + * aborted your poll()/select() loop, using libusb_unlock_events(). + * + * \section threadwait Letting other threads do the work for you + * + * Although the events lock is a critical part of the solution, it is not + * enough on it's own. You might wonder if the following is sufficient... +\code + libusb_lock_events(ctx); + while (!completed) { + poll(libusb file descriptors, 120*1000); + if (poll indicates activity) + libusb_handle_events_timeout(ctx, &zero_tv); + } + libusb_unlock_events(ctx); +\endcode + * ...and the answer is that it is not. This is because the transfer in the + * code shown above may take a long time (say 30 seconds) to complete, and + * the lock is not released until the transfer is completed. + * + * Another thread with similar code that wants to do event handling may be + * working with a transfer that completes after a few milliseconds. Despite + * having such a quick completion time, the other thread cannot check that + * status of its transfer until the code above has finished (30 seconds later) + * due to contention on the lock. + * + * To solve this, libusb offers you a mechanism to determine when another + * thread is handling events. It also offers a mechanism to block your thread + * until the event handling thread has completed an event (and this mechanism + * does not involve polling of file descriptors). + * + * After determining that another thread is currently handling events, you + * obtain the event waiters lock using libusb_lock_event_waiters(). + * You then re-check that some other thread is still handling events, and if + * so, you call libusb_wait_for_event(). + * + * libusb_wait_for_event() puts your application to sleep until an event + * occurs, or until a thread releases the events lock. When either of these + * things happen, your thread is woken up, and should re-check the condition + * it was waiting on. It should also re-check that another thread is handling + * events, and if not, it should start handling events itself. + * + * This looks like the following, as pseudo-code: +\code +retry: +if (libusb_try_lock_events(ctx) == 0) { + // we obtained the event lock: do our own event handling + while (!completed) { + if (!libusb_event_handling_ok(ctx)) { + libusb_unlock_events(ctx); + goto retry; + } + poll(libusb file descriptors, 120*1000); + if (poll indicates activity) + libusb_handle_events_locked(ctx, 0); + } + libusb_unlock_events(ctx); +} else { + // another thread is doing event handling. wait for it to signal us that + // an event has completed + libusb_lock_event_waiters(ctx); + + while (!completed) { + // now that we have the event waiters lock, double check that another + // thread is still handling events for us. (it may have ceased handling + // events in the time it took us to reach this point) + if (!libusb_event_handler_active(ctx)) { + // whoever was handling events is no longer doing so, try again + libusb_unlock_event_waiters(ctx); + goto retry; + } + + libusb_wait_for_event(ctx, NULL); + } + libusb_unlock_event_waiters(ctx); +} +printf("completed!\n"); +\endcode + * + * A naive look at the above code may suggest that this can only support + * one event waiter (hence a total of 2 competing threads, the other doing + * event handling), because the event waiter seems to have taken the event + * waiters lock while waiting for an event. However, the system does support + * multiple event waiters, because libusb_wait_for_event() actually drops + * the lock while waiting, and reaquires it before continuing. + * + * We have now implemented code which can dynamically handle situations where + * nobody is handling events (so we should do it ourselves), and it can also + * handle situations where another thread is doing event handling (so we can + * piggyback onto them). It is also equipped to handle a combination of + * the two, for example, another thread is doing event handling, but for + * whatever reason it stops doing so before our condition is met, so we take + * over the event handling. + * + * Four functions were introduced in the above pseudo-code. Their importance + * should be apparent from the code shown above. + * -# libusb_try_lock_events() is a non-blocking function which attempts + * to acquire the events lock but returns a failure code if it is contended. + * -# libusb_event_handling_ok() checks that libusb is still happy for your + * thread to be performing event handling. Sometimes, libusb needs to + * interrupt the event handler, and this is how you can check if you have + * been interrupted. If this function returns 0, the correct behaviour is + * for you to give up the event handling lock, and then to repeat the cycle. + * The following libusb_try_lock_events() will fail, so you will become an + * events waiter. For more information on this, read \ref fullstory below. + * -# libusb_handle_events_locked() is a variant of + * libusb_handle_events_timeout() that you can call while holding the + * events lock. libusb_handle_events_timeout() itself implements similar + * logic to the above, so be sure not to call it when you are + * "working behind libusb's back", as is the case here. + * -# libusb_event_handler_active() determines if someone is currently + * holding the events lock + * + * You might be wondering why there is no function to wake up all threads + * blocked on libusb_wait_for_event(). This is because libusb can do this + * internally: it will wake up all such threads when someone calls + * libusb_unlock_events() or when a transfer completes (at the point after its + * callback has returned). + * + * \subsection fullstory The full story + * + * The above explanation should be enough to get you going, but if you're + * really thinking through the issues then you may be left with some more + * questions regarding libusb's internals. If you're curious, read on, and if + * not, skip to the next section to avoid confusing yourself! + * + * The immediate question that may spring to mind is: what if one thread + * modifies the set of file descriptors that need to be polled while another + * thread is doing event handling? + * + * There are 2 situations in which this may happen. + * -# libusb_open() will add another file descriptor to the poll set, + * therefore it is desirable to interrupt the event handler so that it + * restarts, picking up the new descriptor. + * -# libusb_close() will remove a file descriptor from the poll set. There + * are all kinds of race conditions that could arise here, so it is + * important that nobody is doing event handling at this time. + * + * libusb handles these issues internally, so application developers do not + * have to stop their event handlers while opening/closing devices. Here's how + * it works, focusing on the libusb_close() situation first: + * + * -# During initialization, libusb opens an internal pipe, and it adds the read + * end of this pipe to the set of file descriptors to be polled. + * -# During libusb_close(), libusb writes some dummy data on this event pipe. + * This immediately interrupts the event handler. libusb also records + * internally that it is trying to interrupt event handlers for this + * high-priority event. + * -# At this point, some of the functions described above start behaving + * differently: + * - libusb_event_handling_ok() starts returning 1, indicating that it is NOT + * OK for event handling to continue. + * - libusb_try_lock_events() starts returning 1, indicating that another + * thread holds the event handling lock, even if the lock is uncontended. + * - libusb_event_handler_active() starts returning 1, indicating that + * another thread is doing event handling, even if that is not true. + * -# The above changes in behaviour result in the event handler stopping and + * giving up the events lock very quickly, giving the high-priority + * libusb_close() operation a "free ride" to acquire the events lock. All + * threads that are competing to do event handling become event waiters. + * -# With the events lock held inside libusb_close(), libusb can safely remove + * a file descriptor from the poll set, in the safety of knowledge that + * nobody is polling those descriptors or trying to access the poll set. + * -# After obtaining the events lock, the close operation completes very + * quickly (usually a matter of milliseconds) and then immediately releases + * the events lock. + * -# At the same time, the behaviour of libusb_event_handling_ok() and friends + * reverts to the original, documented behaviour. + * -# The release of the events lock causes the threads that are waiting for + * events to be woken up and to start competing to become event handlers + * again. One of them will succeed; it will then re-obtain the list of poll + * descriptors, and USB I/O will then continue as normal. + * + * libusb_open() is similar, and is actually a more simplistic case. Upon a + * call to libusb_open(): + * + * -# The device is opened and a file descriptor is added to the poll set. + * -# libusb sends some dummy data on the event pipe, and records that it + * is trying to modify the poll descriptor set. + * -# The event handler is interrupted, and the same behaviour change as for + * libusb_close() takes effect, causing all event handling threads to become + * event waiters. + * -# The libusb_open() implementation takes its free ride to the events lock. + * -# Happy that it has successfully paused the events handler, libusb_open() + * releases the events lock. + * -# The event waiter threads are all woken up and compete to become event + * handlers again. The one that succeeds will obtain the list of poll + * descriptors again, which will include the addition of the new device. + * + * \subsection concl Closing remarks + * + * The above may seem a little complicated, but hopefully I have made it clear + * why such complications are necessary. Also, do not forget that this only + * applies to applications that take libusb's file descriptors and integrate + * them into their own polling loops. + * + * You may decide that it is OK for your multi-threaded application to ignore + * some of the rules and locks detailed above, because you don't think that + * two threads can ever be polling the descriptors at the same time. If that + * is the case, then that's good news for you because you don't have to worry. + * But be careful here; remember that the synchronous I/O functions do event + * handling internally. If you have one thread doing event handling in a loop + * (without implementing the rules and locking semantics documented above) + * and another trying to send a synchronous USB transfer, you will end up with + * two threads monitoring the same descriptors, and the above-described + * undesirable behaviour occurring. The solution is for your polling thread to + * play by the rules; the synchronous I/O functions do so, and this will result + * in them getting along in perfect harmony. + * + * If you do have a dedicated thread doing event handling, it is perfectly + * legal for it to take the event handling lock for long periods of time. Any + * synchronous I/O functions you call from other threads will transparently + * fall back to the "event waiters" mechanism detailed above. The only + * consideration that your event handling thread must apply is the one related + * to libusb_event_handling_ok(): you must call this before every poll(), and + * give up the events lock if instructed. + */ + +int usbi_io_init(struct libusb_context *ctx) +{ + int r; + + usbi_mutex_init(&ctx->flying_transfers_lock); + usbi_mutex_init(&ctx->events_lock); + usbi_mutex_init(&ctx->event_waiters_lock); + usbi_cond_init(&ctx->event_waiters_cond); + usbi_mutex_init(&ctx->event_data_lock); + usbi_tls_key_create(&ctx->event_handling_key); + list_init(&ctx->flying_transfers); + list_init(&ctx->ipollfds); + list_init(&ctx->hotplug_msgs); + list_init(&ctx->completed_transfers); + + /* FIXME should use an eventfd on kernels that support it */ + r = usbi_pipe(ctx->event_pipe); + if (r < 0) { + r = LIBUSB_ERROR_OTHER; + goto err; + } + + r = usbi_add_pollfd(ctx, ctx->event_pipe[0], POLLIN); + if (r < 0) + goto err_close_pipe; + +#ifdef USBI_TIMERFD_AVAILABLE + ctx->timerfd = timerfd_create(usbi_backend->get_timerfd_clockid(), + TFD_NONBLOCK); + if (ctx->timerfd >= 0) { + usbi_dbg("using timerfd for timeouts"); + r = usbi_add_pollfd(ctx, ctx->timerfd, POLLIN); + if (r < 0) + goto err_close_timerfd; + } else { + usbi_dbg("timerfd not available (code %d error %d)", ctx->timerfd, errno); + ctx->timerfd = -1; + } +#endif + + return 0; + +#ifdef USBI_TIMERFD_AVAILABLE +err_close_timerfd: + close(ctx->timerfd); + usbi_remove_pollfd(ctx, ctx->event_pipe[0]); +#endif +err_close_pipe: + usbi_close(ctx->event_pipe[0]); + usbi_close(ctx->event_pipe[1]); +err: + usbi_mutex_destroy(&ctx->flying_transfers_lock); + usbi_mutex_destroy(&ctx->events_lock); + usbi_mutex_destroy(&ctx->event_waiters_lock); + usbi_cond_destroy(&ctx->event_waiters_cond); + usbi_mutex_destroy(&ctx->event_data_lock); + usbi_tls_key_delete(ctx->event_handling_key); + return r; +} + +void usbi_io_exit(struct libusb_context *ctx) +{ + usbi_remove_pollfd(ctx, ctx->event_pipe[0]); + usbi_close(ctx->event_pipe[0]); + usbi_close(ctx->event_pipe[1]); +#ifdef USBI_TIMERFD_AVAILABLE + if (usbi_using_timerfd(ctx)) { + usbi_remove_pollfd(ctx, ctx->timerfd); + close(ctx->timerfd); + } +#endif + usbi_mutex_destroy(&ctx->flying_transfers_lock); + usbi_mutex_destroy(&ctx->events_lock); + usbi_mutex_destroy(&ctx->event_waiters_lock); + usbi_cond_destroy(&ctx->event_waiters_cond); + usbi_mutex_destroy(&ctx->event_data_lock); + usbi_tls_key_delete(ctx->event_handling_key); + if (ctx->pollfds) + free(ctx->pollfds); +} + +static int calculate_timeout(struct usbi_transfer *transfer) +{ + int r; + struct timespec current_time; + unsigned int timeout = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer)->timeout; + + if (!timeout) + return 0; + + r = usbi_backend->clock_gettime(USBI_CLOCK_MONOTONIC, ¤t_time); + if (r < 0) { + usbi_err(ITRANSFER_CTX(transfer), + "failed to read monotonic clock, errno=%d", errno); + return r; + } + + current_time.tv_sec += timeout / 1000; + current_time.tv_nsec += (timeout % 1000) * 1000000; + + while (current_time.tv_nsec >= 1000000000) { + current_time.tv_nsec -= 1000000000; + current_time.tv_sec++; + } + + TIMESPEC_TO_TIMEVAL(&transfer->timeout, ¤t_time); + return 0; +} + +/** \ingroup libusb_asyncio + * Allocate a libusb transfer with a specified number of isochronous packet + * descriptors. The returned transfer is pre-initialized for you. When the new + * transfer is no longer needed, it should be freed with + * libusb_free_transfer(). + * + * Transfers intended for non-isochronous endpoints (e.g. control, bulk, + * interrupt) should specify an iso_packets count of zero. + * + * For transfers intended for isochronous endpoints, specify an appropriate + * number of packet descriptors to be allocated as part of the transfer. + * The returned transfer is not specially initialized for isochronous I/O; + * you are still required to set the + * \ref libusb_transfer::num_iso_packets "num_iso_packets" and + * \ref libusb_transfer::type "type" fields accordingly. + * + * It is safe to allocate a transfer with some isochronous packets and then + * use it on a non-isochronous endpoint. If you do this, ensure that at time + * of submission, num_iso_packets is 0 and that type is set appropriately. + * + * \param iso_packets number of isochronous packet descriptors to allocate + * \returns a newly allocated transfer, or NULL on error + */ +DEFAULT_VISIBILITY +struct libusb_transfer * LIBUSB_CALL libusb_alloc_transfer( + int iso_packets) +{ + struct libusb_transfer *transfer; + size_t os_alloc_size = usbi_backend->transfer_priv_size; + size_t alloc_size = sizeof(struct usbi_transfer) + + sizeof(struct libusb_transfer) + + (sizeof(struct libusb_iso_packet_descriptor) * iso_packets) + + os_alloc_size; + struct usbi_transfer *itransfer = calloc(1, alloc_size); + if (!itransfer) + return NULL; + + itransfer->num_iso_packets = iso_packets; + usbi_mutex_init(&itransfer->lock); + transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + usbi_dbg("transfer %p", transfer); + return transfer; +} + +/** \ingroup libusb_asyncio + * Free a transfer structure. This should be called for all transfers + * allocated with libusb_alloc_transfer(). + * + * If the \ref libusb_transfer_flags::LIBUSB_TRANSFER_FREE_BUFFER + * "LIBUSB_TRANSFER_FREE_BUFFER" flag is set and the transfer buffer is + * non-NULL, this function will also free the transfer buffer using the + * standard system memory allocator (e.g. free()). + * + * It is legal to call this function with a NULL transfer. In this case, + * the function will simply return safely. + * + * It is not legal to free an active transfer (one which has been submitted + * and has not yet completed). + * + * \param transfer the transfer to free + */ +void API_EXPORTED libusb_free_transfer(struct libusb_transfer *transfer) +{ + struct usbi_transfer *itransfer; + if (!transfer) + return; + + usbi_dbg("transfer %p", transfer); + if (transfer->flags & LIBUSB_TRANSFER_FREE_BUFFER && transfer->buffer) + free(transfer->buffer); + + itransfer = LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer); + usbi_mutex_destroy(&itransfer->lock); + free(itransfer); +} + +#ifdef USBI_TIMERFD_AVAILABLE +static int disarm_timerfd(struct libusb_context *ctx) +{ + const struct itimerspec disarm_timer = { { 0, 0 }, { 0, 0 } }; + int r; + + usbi_dbg(""); + r = timerfd_settime(ctx->timerfd, 0, &disarm_timer, NULL); + if (r < 0) + return LIBUSB_ERROR_OTHER; + else + return 0; +} + +/* iterates through the flying transfers, and rearms the timerfd based on the + * next upcoming timeout. + * must be called with flying_list locked. + * returns 0 on success or a LIBUSB_ERROR code on failure. + */ +static int arm_timerfd_for_next_timeout(struct libusb_context *ctx) +{ + struct usbi_transfer *transfer; + + list_for_each_entry(transfer, &ctx->flying_transfers, list, struct usbi_transfer) { + struct timeval *cur_tv = &transfer->timeout; + + /* if we've reached transfers of infinite timeout, then we have no + * arming to do */ + if (!timerisset(cur_tv)) + goto disarm; + + /* act on first transfer that has not already been handled */ + if (!(transfer->timeout_flags & (USBI_TRANSFER_TIMEOUT_HANDLED | USBI_TRANSFER_OS_HANDLES_TIMEOUT))) { + int r; + const struct itimerspec it = { {0, 0}, + { cur_tv->tv_sec, cur_tv->tv_usec * 1000 } }; + usbi_dbg("next timeout originally %dms", USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer)->timeout); + r = timerfd_settime(ctx->timerfd, TFD_TIMER_ABSTIME, &it, NULL); + if (r < 0) + return LIBUSB_ERROR_OTHER; + return 0; + } + } + +disarm: + return disarm_timerfd(ctx); +} +#else +static int arm_timerfd_for_next_timeout(struct libusb_context *ctx) +{ + UNUSED(ctx); + return 0; +} +#endif + +/* add a transfer to the (timeout-sorted) active transfers list. + * This function will return non 0 if fails to update the timer, + * in which case the transfer is *not* on the flying_transfers list. */ +static int add_to_flying_list(struct usbi_transfer *transfer) +{ + struct usbi_transfer *cur; + struct timeval *timeout = &transfer->timeout; + struct libusb_context *ctx = ITRANSFER_CTX(transfer); + int r; + int first = 1; + + r = calculate_timeout(transfer); + if (r) + return r; + + /* if we have no other flying transfers, start the list with this one */ + if (list_empty(&ctx->flying_transfers)) { + list_add(&transfer->list, &ctx->flying_transfers); + goto out; + } + + /* if we have infinite timeout, append to end of list */ + if (!timerisset(timeout)) { + list_add_tail(&transfer->list, &ctx->flying_transfers); + /* first is irrelevant in this case */ + goto out; + } + + /* otherwise, find appropriate place in list */ + list_for_each_entry(cur, &ctx->flying_transfers, list, struct usbi_transfer) { + /* find first timeout that occurs after the transfer in question */ + struct timeval *cur_tv = &cur->timeout; + + if (!timerisset(cur_tv) || (cur_tv->tv_sec > timeout->tv_sec) || + (cur_tv->tv_sec == timeout->tv_sec && + cur_tv->tv_usec > timeout->tv_usec)) { + list_add_tail(&transfer->list, &cur->list); + goto out; + } + first = 0; + } + /* first is 0 at this stage (list not empty) */ + + /* otherwise we need to be inserted at the end */ + list_add_tail(&transfer->list, &ctx->flying_transfers); +out: +#ifdef USBI_TIMERFD_AVAILABLE + if (first && usbi_using_timerfd(ctx) && timerisset(timeout)) { + /* if this transfer has the lowest timeout of all active transfers, + * rearm the timerfd with this transfer's timeout */ + const struct itimerspec it = { {0, 0}, + { timeout->tv_sec, timeout->tv_usec * 1000 } }; + usbi_dbg("arm timerfd for timeout in %dms (first in line)", + USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer)->timeout); + r = timerfd_settime(ctx->timerfd, TFD_TIMER_ABSTIME, &it, NULL); + if (r < 0) { + usbi_warn(ctx, "failed to arm first timerfd (errno %d)", errno); + r = LIBUSB_ERROR_OTHER; + } + } +#else + UNUSED(first); +#endif + + if (r) + list_del(&transfer->list); + + return r; +} + +/* remove a transfer from the active transfers list. + * This function will *always* remove the transfer from the + * flying_transfers list. It will return a LIBUSB_ERROR code + * if it fails to update the timer for the next timeout. */ +static int remove_from_flying_list(struct usbi_transfer *transfer) +{ + struct libusb_context *ctx = ITRANSFER_CTX(transfer); + int rearm_timerfd; + int r = 0; + + usbi_mutex_lock(&ctx->flying_transfers_lock); + rearm_timerfd = (timerisset(&transfer->timeout) && + list_first_entry(&ctx->flying_transfers, struct usbi_transfer, list) == transfer); + list_del(&transfer->list); + if (usbi_using_timerfd(ctx) && rearm_timerfd) + r = arm_timerfd_for_next_timeout(ctx); + usbi_mutex_unlock(&ctx->flying_transfers_lock); + + return r; +} + +/** \ingroup libusb_asyncio + * Submit a transfer. This function will fire off the USB transfer and then + * return immediately. + * + * \param transfer the transfer to submit + * \returns 0 on success + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns LIBUSB_ERROR_BUSY if the transfer has already been submitted. + * \returns LIBUSB_ERROR_NOT_SUPPORTED if the transfer flags are not supported + * by the operating system. + * \returns LIBUSB_ERROR_INVALID_PARAM if the transfer size is larger than + * the operating system and/or hardware can support + * \returns another LIBUSB_ERROR code on other failure + */ +int API_EXPORTED libusb_submit_transfer(struct libusb_transfer *transfer) +{ + struct usbi_transfer *itransfer = + LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer); + struct libusb_context *ctx = TRANSFER_CTX(transfer); + int r; + + usbi_dbg("transfer %p", transfer); + + /* + * Important note on locking, this function takes / releases locks + * in the following order: + * take flying_transfers_lock + * take itransfer->lock + * clear transfer + * add to flying_transfers list + * release flying_transfers_lock + * submit transfer + * release itransfer->lock + * if submit failed: + * take flying_transfers_lock + * remove from flying_transfers list + * release flying_transfers_lock + * + * Note that it takes locks in the order a-b and then releases them + * in the same order a-b. This is somewhat unusual but not wrong, + * release order is not important as long as *all* locks are released + * before re-acquiring any locks. + * + * This means that the ordering of first releasing itransfer->lock + * and then re-acquiring the flying_transfers_list on error is + * important and must not be changed! + * + * This is done this way because when we take both locks we must always + * take flying_transfers_lock first to avoid ab-ba style deadlocks with + * the timeout handling and usbi_handle_disconnect paths. + * + * And we cannot release itransfer->lock before the submission is + * complete otherwise timeout handling for transfers with short + * timeouts may run before submission. + */ + usbi_mutex_lock(&ctx->flying_transfers_lock); + usbi_mutex_lock(&itransfer->lock); + if (itransfer->state_flags & USBI_TRANSFER_IN_FLIGHT) { + usbi_mutex_unlock(&ctx->flying_transfers_lock); + usbi_mutex_unlock(&itransfer->lock); + return LIBUSB_ERROR_BUSY; + } + itransfer->transferred = 0; + itransfer->state_flags = 0; + itransfer->timeout_flags = 0; + r = add_to_flying_list(itransfer); + if (r) { + usbi_mutex_unlock(&ctx->flying_transfers_lock); + usbi_mutex_unlock(&itransfer->lock); + return r; + } + /* + * We must release the flying transfers lock here, because with + * some backends the submit_transfer method is synchroneous. + */ + usbi_mutex_unlock(&ctx->flying_transfers_lock); + + r = usbi_backend->submit_transfer(itransfer); + if (r == LIBUSB_SUCCESS) { + itransfer->state_flags |= USBI_TRANSFER_IN_FLIGHT; + /* keep a reference to this device */ + libusb_ref_device(transfer->dev_handle->dev); + } + usbi_mutex_unlock(&itransfer->lock); + + if (r != LIBUSB_SUCCESS) + remove_from_flying_list(itransfer); + + return r; +} + +/** \ingroup libusb_asyncio + * Asynchronously cancel a previously submitted transfer. + * This function returns immediately, but this does not indicate cancellation + * is complete. Your callback function will be invoked at some later time + * with a transfer status of + * \ref libusb_transfer_status::LIBUSB_TRANSFER_CANCELLED + * "LIBUSB_TRANSFER_CANCELLED." + * + * \param transfer the transfer to cancel + * \returns 0 on success + * \returns LIBUSB_ERROR_NOT_FOUND if the transfer is not in progress, + * already complete, or already cancelled. + * \returns a LIBUSB_ERROR code on failure + */ +int API_EXPORTED libusb_cancel_transfer(struct libusb_transfer *transfer) +{ + struct usbi_transfer *itransfer = + LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer); + int r; + + usbi_dbg("transfer %p", transfer ); + usbi_mutex_lock(&itransfer->lock); + if (!(itransfer->state_flags & USBI_TRANSFER_IN_FLIGHT) + || (itransfer->state_flags & USBI_TRANSFER_CANCELLING)) { + r = LIBUSB_ERROR_NOT_FOUND; + goto out; + } + r = usbi_backend->cancel_transfer(itransfer); + if (r < 0) { + if (r != LIBUSB_ERROR_NOT_FOUND && + r != LIBUSB_ERROR_NO_DEVICE) + usbi_err(TRANSFER_CTX(transfer), + "cancel transfer failed error %d", r); + else + usbi_dbg("cancel transfer failed error %d", r); + + if (r == LIBUSB_ERROR_NO_DEVICE) + itransfer->state_flags |= USBI_TRANSFER_DEVICE_DISAPPEARED; + } + + itransfer->state_flags |= USBI_TRANSFER_CANCELLING; + +out: + usbi_mutex_unlock(&itransfer->lock); + return r; +} + +/** \ingroup libusb_asyncio + * Set a transfers bulk stream id. Note users are advised to use + * libusb_fill_bulk_stream_transfer() instead of calling this function + * directly. + * + * Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103 + * + * \param transfer the transfer to set the stream id for + * \param stream_id the stream id to set + * \see libusb_alloc_streams() + */ +void API_EXPORTED libusb_transfer_set_stream_id( + struct libusb_transfer *transfer, uint32_t stream_id) +{ + struct usbi_transfer *itransfer = + LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer); + + itransfer->stream_id = stream_id; +} + +/** \ingroup libusb_asyncio + * Get a transfers bulk stream id. + * + * Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103 + * + * \param transfer the transfer to get the stream id for + * \returns the stream id for the transfer + */ +uint32_t API_EXPORTED libusb_transfer_get_stream_id( + struct libusb_transfer *transfer) +{ + struct usbi_transfer *itransfer = + LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer); + + return itransfer->stream_id; +} + +/* Handle completion of a transfer (completion might be an error condition). + * This will invoke the user-supplied callback function, which may end up + * freeing the transfer. Therefore you cannot use the transfer structure + * after calling this function, and you should free all backend-specific + * data before calling it. + * Do not call this function with the usbi_transfer lock held. User-specified + * callback functions may attempt to directly resubmit the transfer, which + * will attempt to take the lock. */ +int usbi_handle_transfer_completion(struct usbi_transfer *itransfer, + enum libusb_transfer_status status) +{ + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_device_handle *dev_handle = transfer->dev_handle; + uint8_t flags; + int r; + + r = remove_from_flying_list(itransfer); + if (r < 0) + usbi_err(ITRANSFER_CTX(itransfer), "failed to set timer for next timeout, errno=%d", errno); + + usbi_mutex_lock(&itransfer->lock); + itransfer->state_flags &= ~USBI_TRANSFER_IN_FLIGHT; + usbi_mutex_unlock(&itransfer->lock); + + if (status == LIBUSB_TRANSFER_COMPLETED + && transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) { + int rqlen = transfer->length; + if (transfer->type == LIBUSB_TRANSFER_TYPE_CONTROL) + rqlen -= LIBUSB_CONTROL_SETUP_SIZE; + if (rqlen != itransfer->transferred) { + usbi_dbg("interpreting short transfer as error"); + status = LIBUSB_TRANSFER_ERROR; + } + } + + flags = transfer->flags; + transfer->status = status; + transfer->actual_length = itransfer->transferred; + usbi_dbg("transfer %p has callback %p", transfer, transfer->callback); + if (transfer->callback) + transfer->callback(transfer); + /* transfer might have been freed by the above call, do not use from + * this point. */ + if (flags & LIBUSB_TRANSFER_FREE_TRANSFER) + libusb_free_transfer(transfer); + libusb_unref_device(dev_handle->dev); + return r; +} + +/* Similar to usbi_handle_transfer_completion() but exclusively for transfers + * that were asynchronously cancelled. The same concerns w.r.t. freeing of + * transfers exist here. + * Do not call this function with the usbi_transfer lock held. User-specified + * callback functions may attempt to directly resubmit the transfer, which + * will attempt to take the lock. */ +int usbi_handle_transfer_cancellation(struct usbi_transfer *transfer) +{ + struct libusb_context *ctx = ITRANSFER_CTX(transfer); + uint8_t timed_out; + + usbi_mutex_lock(&ctx->flying_transfers_lock); + timed_out = transfer->timeout_flags & USBI_TRANSFER_TIMED_OUT; + usbi_mutex_unlock(&ctx->flying_transfers_lock); + + /* if the URB was cancelled due to timeout, report timeout to the user */ + if (timed_out) { + usbi_dbg("detected timeout cancellation"); + return usbi_handle_transfer_completion(transfer, LIBUSB_TRANSFER_TIMED_OUT); + } + + /* otherwise its a normal async cancel */ + return usbi_handle_transfer_completion(transfer, LIBUSB_TRANSFER_CANCELLED); +} + +/* Add a completed transfer to the completed_transfers list of the + * context and signal the event. The backend's handle_transfer_completion() + * function will be called the next time an event handler runs. */ +void usbi_signal_transfer_completion(struct usbi_transfer *transfer) +{ + struct libusb_context *ctx = ITRANSFER_CTX(transfer); + int pending_events; + + usbi_mutex_lock(&ctx->event_data_lock); + pending_events = usbi_pending_events(ctx); + list_add_tail(&transfer->completed_list, &ctx->completed_transfers); + if (!pending_events) + usbi_signal_event(ctx); + usbi_mutex_unlock(&ctx->event_data_lock); +} + +/** \ingroup libusb_poll + * Attempt to acquire the event handling lock. This lock is used to ensure that + * only one thread is monitoring libusb event sources at any one time. + * + * You only need to use this lock if you are developing an application + * which calls poll() or select() on libusb's file descriptors directly. + * If you stick to libusb's event handling loop functions (e.g. + * libusb_handle_events()) then you do not need to be concerned with this + * locking. + * + * While holding this lock, you are trusted to actually be handling events. + * If you are no longer handling events, you must call libusb_unlock_events() + * as soon as possible. + * + * \param ctx the context to operate on, or NULL for the default context + * \returns 0 if the lock was obtained successfully + * \returns 1 if the lock was not obtained (i.e. another thread holds the lock) + * \ref libusb_mtasync + */ +int API_EXPORTED libusb_try_lock_events(libusb_context *ctx) +{ + int r; + unsigned int ru; + USBI_GET_CONTEXT(ctx); + + /* is someone else waiting to close a device? if so, don't let this thread + * start event handling */ + usbi_mutex_lock(&ctx->event_data_lock); + ru = ctx->device_close; + usbi_mutex_unlock(&ctx->event_data_lock); + if (ru) { + usbi_dbg("someone else is closing a device"); + return 1; + } + + r = usbi_mutex_trylock(&ctx->events_lock); + if (r) + return 1; + + ctx->event_handler_active = 1; + return 0; +} + +/** \ingroup libusb_poll + * Acquire the event handling lock, blocking until successful acquisition if + * it is contended. This lock is used to ensure that only one thread is + * monitoring libusb event sources at any one time. + * + * You only need to use this lock if you are developing an application + * which calls poll() or select() on libusb's file descriptors directly. + * If you stick to libusb's event handling loop functions (e.g. + * libusb_handle_events()) then you do not need to be concerned with this + * locking. + * + * While holding this lock, you are trusted to actually be handling events. + * If you are no longer handling events, you must call libusb_unlock_events() + * as soon as possible. + * + * \param ctx the context to operate on, or NULL for the default context + * \ref libusb_mtasync + */ +void API_EXPORTED libusb_lock_events(libusb_context *ctx) +{ + USBI_GET_CONTEXT(ctx); + usbi_mutex_lock(&ctx->events_lock); + ctx->event_handler_active = 1; +} + +/** \ingroup libusb_poll + * Release the lock previously acquired with libusb_try_lock_events() or + * libusb_lock_events(). Releasing this lock will wake up any threads blocked + * on libusb_wait_for_event(). + * + * \param ctx the context to operate on, or NULL for the default context + * \ref libusb_mtasync + */ +void API_EXPORTED libusb_unlock_events(libusb_context *ctx) +{ + USBI_GET_CONTEXT(ctx); + ctx->event_handler_active = 0; + usbi_mutex_unlock(&ctx->events_lock); + + /* FIXME: perhaps we should be a bit more efficient by not broadcasting + * the availability of the events lock when we are modifying pollfds + * (check ctx->device_close)? */ + usbi_mutex_lock(&ctx->event_waiters_lock); + usbi_cond_broadcast(&ctx->event_waiters_cond); + usbi_mutex_unlock(&ctx->event_waiters_lock); +} + +/** \ingroup libusb_poll + * Determine if it is still OK for this thread to be doing event handling. + * + * Sometimes, libusb needs to temporarily pause all event handlers, and this + * is the function you should use before polling file descriptors to see if + * this is the case. + * + * If this function instructs your thread to give up the events lock, you + * should just continue the usual logic that is documented in \ref libusb_mtasync. + * On the next iteration, your thread will fail to obtain the events lock, + * and will hence become an event waiter. + * + * This function should be called while the events lock is held: you don't + * need to worry about the results of this function if your thread is not + * the current event handler. + * + * \param ctx the context to operate on, or NULL for the default context + * \returns 1 if event handling can start or continue + * \returns 0 if this thread must give up the events lock + * \ref fullstory "Multi-threaded I/O: the full story" + */ +int API_EXPORTED libusb_event_handling_ok(libusb_context *ctx) +{ + unsigned int r; + USBI_GET_CONTEXT(ctx); + + /* is someone else waiting to close a device? if so, don't let this thread + * continue event handling */ + usbi_mutex_lock(&ctx->event_data_lock); + r = ctx->device_close; + usbi_mutex_unlock(&ctx->event_data_lock); + if (r) { + usbi_dbg("someone else is closing a device"); + return 0; + } + + return 1; +} + + +/** \ingroup libusb_poll + * Determine if an active thread is handling events (i.e. if anyone is holding + * the event handling lock). + * + * \param ctx the context to operate on, or NULL for the default context + * \returns 1 if a thread is handling events + * \returns 0 if there are no threads currently handling events + * \ref libusb_mtasync + */ +int API_EXPORTED libusb_event_handler_active(libusb_context *ctx) +{ + unsigned int r; + USBI_GET_CONTEXT(ctx); + + /* is someone else waiting to close a device? if so, don't let this thread + * start event handling -- indicate that event handling is happening */ + usbi_mutex_lock(&ctx->event_data_lock); + r = ctx->device_close; + usbi_mutex_unlock(&ctx->event_data_lock); + if (r) { + usbi_dbg("someone else is closing a device"); + return 1; + } + + return ctx->event_handler_active; +} + +/** \ingroup libusb_poll + * Interrupt any active thread that is handling events. This is mainly useful + * for interrupting a dedicated event handling thread when an application + * wishes to call libusb_exit(). + * + * Since version 1.0.21, \ref LIBUSB_API_VERSION >= 0x01000105 + * + * \param ctx the context to operate on, or NULL for the default context + * \ref libusb_mtasync + */ +void API_EXPORTED libusb_interrupt_event_handler(libusb_context *ctx) +{ + int pending_events; + USBI_GET_CONTEXT(ctx); + + usbi_dbg(""); + usbi_mutex_lock(&ctx->event_data_lock); + + pending_events = usbi_pending_events(ctx); + ctx->event_flags |= USBI_EVENT_USER_INTERRUPT; + if (!pending_events) + usbi_signal_event(ctx); + + usbi_mutex_unlock(&ctx->event_data_lock); +} + +/** \ingroup libusb_poll + * Acquire the event waiters lock. This lock is designed to be obtained under + * the situation where you want to be aware when events are completed, but + * some other thread is event handling so calling libusb_handle_events() is not + * allowed. + * + * You then obtain this lock, re-check that another thread is still handling + * events, then call libusb_wait_for_event(). + * + * You only need to use this lock if you are developing an application + * which calls poll() or select() on libusb's file descriptors directly, + * and may potentially be handling events from 2 threads simultaenously. + * If you stick to libusb's event handling loop functions (e.g. + * libusb_handle_events()) then you do not need to be concerned with this + * locking. + * + * \param ctx the context to operate on, or NULL for the default context + * \ref libusb_mtasync + */ +void API_EXPORTED libusb_lock_event_waiters(libusb_context *ctx) +{ + USBI_GET_CONTEXT(ctx); + usbi_mutex_lock(&ctx->event_waiters_lock); +} + +/** \ingroup libusb_poll + * Release the event waiters lock. + * \param ctx the context to operate on, or NULL for the default context + * \ref libusb_mtasync + */ +void API_EXPORTED libusb_unlock_event_waiters(libusb_context *ctx) +{ + USBI_GET_CONTEXT(ctx); + usbi_mutex_unlock(&ctx->event_waiters_lock); +} + +/** \ingroup libusb_poll + * Wait for another thread to signal completion of an event. Must be called + * with the event waiters lock held, see libusb_lock_event_waiters(). + * + * This function will block until any of the following conditions are met: + * -# The timeout expires + * -# A transfer completes + * -# A thread releases the event handling lock through libusb_unlock_events() + * + * Condition 1 is obvious. Condition 2 unblocks your thread after + * the callback for the transfer has completed. Condition 3 is important + * because it means that the thread that was previously handling events is no + * longer doing so, so if any events are to complete, another thread needs to + * step up and start event handling. + * + * This function releases the event waiters lock before putting your thread + * to sleep, and reacquires the lock as it is being woken up. + * + * \param ctx the context to operate on, or NULL for the default context + * \param tv maximum timeout for this blocking function. A NULL value + * indicates unlimited timeout. + * \returns 0 after a transfer completes or another thread stops event handling + * \returns 1 if the timeout expired + * \ref libusb_mtasync + */ +int API_EXPORTED libusb_wait_for_event(libusb_context *ctx, struct timeval *tv) +{ + int r; + + USBI_GET_CONTEXT(ctx); + if (tv == NULL) { + usbi_cond_wait(&ctx->event_waiters_cond, &ctx->event_waiters_lock); + return 0; + } + + r = usbi_cond_timedwait(&ctx->event_waiters_cond, + &ctx->event_waiters_lock, tv); + + if (r < 0) + return r; + else + return (r == ETIMEDOUT); +} + +static void handle_timeout(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + int r; + + itransfer->timeout_flags |= USBI_TRANSFER_TIMEOUT_HANDLED; + r = libusb_cancel_transfer(transfer); + if (r == LIBUSB_SUCCESS) + itransfer->timeout_flags |= USBI_TRANSFER_TIMED_OUT; + else + usbi_warn(TRANSFER_CTX(transfer), + "async cancel failed %d errno=%d", r, errno); +} + +static int handle_timeouts_locked(struct libusb_context *ctx) +{ + int r; + struct timespec systime_ts; + struct timeval systime; + struct usbi_transfer *transfer; + + if (list_empty(&ctx->flying_transfers)) + return 0; + + /* get current time */ + r = usbi_backend->clock_gettime(USBI_CLOCK_MONOTONIC, &systime_ts); + if (r < 0) + return r; + + TIMESPEC_TO_TIMEVAL(&systime, &systime_ts); + + /* iterate through flying transfers list, finding all transfers that + * have expired timeouts */ + list_for_each_entry(transfer, &ctx->flying_transfers, list, struct usbi_transfer) { + struct timeval *cur_tv = &transfer->timeout; + + /* if we've reached transfers of infinite timeout, we're all done */ + if (!timerisset(cur_tv)) + return 0; + + /* ignore timeouts we've already handled */ + if (transfer->timeout_flags & (USBI_TRANSFER_TIMEOUT_HANDLED | USBI_TRANSFER_OS_HANDLES_TIMEOUT)) + continue; + + /* if transfer has non-expired timeout, nothing more to do */ + if ((cur_tv->tv_sec > systime.tv_sec) || + (cur_tv->tv_sec == systime.tv_sec && + cur_tv->tv_usec > systime.tv_usec)) + return 0; + + /* otherwise, we've got an expired timeout to handle */ + handle_timeout(transfer); + } + return 0; +} + +static int handle_timeouts(struct libusb_context *ctx) +{ + int r; + USBI_GET_CONTEXT(ctx); + usbi_mutex_lock(&ctx->flying_transfers_lock); + r = handle_timeouts_locked(ctx); + usbi_mutex_unlock(&ctx->flying_transfers_lock); + return r; +} + +#ifdef USBI_TIMERFD_AVAILABLE +static int handle_timerfd_trigger(struct libusb_context *ctx) +{ + int r; + + usbi_mutex_lock(&ctx->flying_transfers_lock); + + /* process the timeout that just happened */ + r = handle_timeouts_locked(ctx); + if (r < 0) + goto out; + + /* arm for next timeout*/ + r = arm_timerfd_for_next_timeout(ctx); + +out: + usbi_mutex_unlock(&ctx->flying_transfers_lock); + return r; +} +#endif + +/* do the actual event handling. assumes that no other thread is concurrently + * doing the same thing. */ +static int handle_events(struct libusb_context *ctx, struct timeval *tv) +{ + int r; + struct usbi_pollfd *ipollfd; + POLL_NFDS_TYPE nfds = 0; + POLL_NFDS_TYPE internal_nfds; + struct pollfd *fds = NULL; + int i = -1; + int timeout_ms; + int special_event; + + /* prevent attempts to recursively handle events (e.g. calling into + * libusb_handle_events() from within a hotplug or transfer callback) */ + if (usbi_handling_events(ctx)) + return LIBUSB_ERROR_BUSY; + usbi_start_event_handling(ctx); + + /* there are certain fds that libusb uses internally, currently: + * + * 1) event pipe + * 2) timerfd + * + * the backend will never need to attempt to handle events on these fds, so + * we determine how many fds are in use internally for this context and when + * handle_events() is called in the backend, the pollfd list and count will + * be adjusted to skip over these internal fds */ + if (usbi_using_timerfd(ctx)) + internal_nfds = 2; + else + internal_nfds = 1; + + /* only reallocate the poll fds when the list of poll fds has been modified + * since the last poll, otherwise reuse them to save the additional overhead */ + usbi_mutex_lock(&ctx->event_data_lock); + if (ctx->event_flags & USBI_EVENT_POLLFDS_MODIFIED) { + usbi_dbg("poll fds modified, reallocating"); + + if (ctx->pollfds) { + free(ctx->pollfds); + ctx->pollfds = NULL; + } + + /* sanity check - it is invalid for a context to have fewer than the + * required internal fds (memory corruption?) */ + assert(ctx->pollfds_cnt >= internal_nfds); + + ctx->pollfds = calloc(ctx->pollfds_cnt, sizeof(*ctx->pollfds)); + if (!ctx->pollfds) { + usbi_mutex_unlock(&ctx->event_data_lock); + r = LIBUSB_ERROR_NO_MEM; + goto done; + } + + list_for_each_entry(ipollfd, &ctx->ipollfds, list, struct usbi_pollfd) { + struct libusb_pollfd *pollfd = &ipollfd->pollfd; + i++; + ctx->pollfds[i].fd = pollfd->fd; + ctx->pollfds[i].events = pollfd->events; + } + + /* reset the flag now that we have the updated list */ + ctx->event_flags &= ~USBI_EVENT_POLLFDS_MODIFIED; + + /* if no further pending events, clear the event pipe so that we do + * not immediately return from poll */ + if (!usbi_pending_events(ctx)) + usbi_clear_event(ctx); + } + fds = ctx->pollfds; + nfds = ctx->pollfds_cnt; + usbi_mutex_unlock(&ctx->event_data_lock); + + timeout_ms = (int)(tv->tv_sec * 1000) + (tv->tv_usec / 1000); + + /* round up to next millisecond */ + if (tv->tv_usec % 1000) + timeout_ms++; + +redo_poll: + usbi_dbg("poll() %d fds with timeout in %dms", nfds, timeout_ms); + r = usbi_poll(fds, nfds, timeout_ms); + usbi_dbg("poll() returned %d", r); + if (r == 0) { + r = handle_timeouts(ctx); + goto done; + } + else if (r == -1 && errno == EINTR) { + r = LIBUSB_ERROR_INTERRUPTED; + goto done; + } + else if (r < 0) { + usbi_err(ctx, "poll failed %d err=%d", r, errno); + r = LIBUSB_ERROR_IO; + goto done; + } + + special_event = 0; + + /* fds[0] is always the event pipe */ + if (fds[0].revents) { + libusb_hotplug_message *message = NULL; + struct usbi_transfer *itransfer; + int ret = 0; + + usbi_dbg("caught a fish on the event pipe"); + + /* take the the event data lock while processing events */ + usbi_mutex_lock(&ctx->event_data_lock); + + /* check if someone added a new poll fd */ + if (ctx->event_flags & USBI_EVENT_POLLFDS_MODIFIED) + usbi_dbg("someone updated the poll fds"); + + if (ctx->event_flags & USBI_EVENT_USER_INTERRUPT) { + usbi_dbg("someone purposely interrupted"); + ctx->event_flags &= ~USBI_EVENT_USER_INTERRUPT; + } + + /* check if someone is closing a device */ + if (ctx->device_close) + usbi_dbg("someone is closing a device"); + + /* check for any pending hotplug messages */ + if (!list_empty(&ctx->hotplug_msgs)) { + usbi_dbg("hotplug message received"); + special_event = 1; + message = list_first_entry(&ctx->hotplug_msgs, libusb_hotplug_message, list); + list_del(&message->list); + } + + /* complete any pending transfers */ + while (ret == 0 && !list_empty(&ctx->completed_transfers)) { + itransfer = list_first_entry(&ctx->completed_transfers, struct usbi_transfer, completed_list); + list_del(&itransfer->completed_list); + usbi_mutex_unlock(&ctx->event_data_lock); + ret = usbi_backend->handle_transfer_completion(itransfer); + if (ret) + usbi_err(ctx, "backend handle_transfer_completion failed with error %d", ret); + usbi_mutex_lock(&ctx->event_data_lock); + } + + /* if no further pending events, clear the event pipe */ + if (!usbi_pending_events(ctx)) + usbi_clear_event(ctx); + + usbi_mutex_unlock(&ctx->event_data_lock); + + /* process the hotplug message, if any */ + if (message) { + usbi_hotplug_match(ctx, message->device, message->event); + + /* the device left, dereference the device */ + if (LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT == message->event) + libusb_unref_device(message->device); + + free(message); + } + + if (ret) { + /* return error code */ + r = ret; + goto done; + } + + if (0 == --r) + goto handled; + } + +#ifdef USBI_TIMERFD_AVAILABLE + /* on timerfd configurations, fds[1] is the timerfd */ + if (usbi_using_timerfd(ctx) && fds[1].revents) { + /* timerfd indicates that a timeout has expired */ + int ret; + usbi_dbg("timerfd triggered"); + special_event = 1; + + ret = handle_timerfd_trigger(ctx); + if (ret < 0) { + /* return error code */ + r = ret; + goto done; + } + + if (0 == --r) + goto handled; + } +#endif + + r = usbi_backend->handle_events(ctx, fds + internal_nfds, nfds - internal_nfds, r); + if (r) + usbi_err(ctx, "backend handle_events failed with error %d", r); + +handled: + if (r == 0 && special_event) { + timeout_ms = 0; + goto redo_poll; + } + +done: + usbi_end_event_handling(ctx); + return r; +} + +/* returns the smallest of: + * 1. timeout of next URB + * 2. user-supplied timeout + * returns 1 if there is an already-expired timeout, otherwise returns 0 + * and populates out + */ +static int get_next_timeout(libusb_context *ctx, struct timeval *tv, + struct timeval *out) +{ + struct timeval timeout; + int r = libusb_get_next_timeout(ctx, &timeout); + if (r) { + /* timeout already expired? */ + if (!timerisset(&timeout)) + return 1; + + /* choose the smallest of next URB timeout or user specified timeout */ + if (timercmp(&timeout, tv, <)) + *out = timeout; + else + *out = *tv; + } else { + *out = *tv; + } + return 0; +} + +/** \ingroup libusb_poll + * Handle any pending events. + * + * libusb determines "pending events" by checking if any timeouts have expired + * and by checking the set of file descriptors for activity. + * + * If a zero timeval is passed, this function will handle any already-pending + * events and then immediately return in non-blocking style. + * + * If a non-zero timeval is passed and no events are currently pending, this + * function will block waiting for events to handle up until the specified + * timeout. If an event arrives or a signal is raised, this function will + * return early. + * + * If the parameter completed is not NULL then after obtaining the event + * handling lock this function will return immediately if the integer + * pointed to is not 0. This allows for race free waiting for the completion + * of a specific transfer. + * + * \param ctx the context to operate on, or NULL for the default context + * \param tv the maximum time to block waiting for events, or an all zero + * timeval struct for non-blocking mode + * \param completed pointer to completion integer to check, or NULL + * \returns 0 on success, or a LIBUSB_ERROR code on failure + * \ref libusb_mtasync + */ +int API_EXPORTED libusb_handle_events_timeout_completed(libusb_context *ctx, + struct timeval *tv, int *completed) +{ + int r; + struct timeval poll_timeout; + + USBI_GET_CONTEXT(ctx); + r = get_next_timeout(ctx, tv, &poll_timeout); + if (r) { + /* timeout already expired */ + return handle_timeouts(ctx); + } + +retry: + if (libusb_try_lock_events(ctx) == 0) { + if (completed == NULL || !*completed) { + /* we obtained the event lock: do our own event handling */ + usbi_dbg("doing our own event handling"); + r = handle_events(ctx, &poll_timeout); + } + libusb_unlock_events(ctx); + return r; + } + + /* another thread is doing event handling. wait for thread events that + * notify event completion. */ + libusb_lock_event_waiters(ctx); + + if (completed && *completed) + goto already_done; + + if (!libusb_event_handler_active(ctx)) { + /* we hit a race: whoever was event handling earlier finished in the + * time it took us to reach this point. try the cycle again. */ + libusb_unlock_event_waiters(ctx); + usbi_dbg("event handler was active but went away, retrying"); + goto retry; + } + + usbi_dbg("another thread is doing event handling"); + r = libusb_wait_for_event(ctx, &poll_timeout); + +already_done: + libusb_unlock_event_waiters(ctx); + + if (r < 0) + return r; + else if (r == 1) + return handle_timeouts(ctx); + else + return 0; +} + +/** \ingroup libusb_poll + * Handle any pending events + * + * Like libusb_handle_events_timeout_completed(), but without the completed + * parameter, calling this function is equivalent to calling + * libusb_handle_events_timeout_completed() with a NULL completed parameter. + * + * This function is kept primarily for backwards compatibility. + * All new code should call libusb_handle_events_completed() or + * libusb_handle_events_timeout_completed() to avoid race conditions. + * + * \param ctx the context to operate on, or NULL for the default context + * \param tv the maximum time to block waiting for events, or an all zero + * timeval struct for non-blocking mode + * \returns 0 on success, or a LIBUSB_ERROR code on failure + */ +int API_EXPORTED libusb_handle_events_timeout(libusb_context *ctx, + struct timeval *tv) +{ + return libusb_handle_events_timeout_completed(ctx, tv, NULL); +} + +/** \ingroup libusb_poll + * Handle any pending events in blocking mode. There is currently a timeout + * hardcoded at 60 seconds but we plan to make it unlimited in future. For + * finer control over whether this function is blocking or non-blocking, or + * for control over the timeout, use libusb_handle_events_timeout_completed() + * instead. + * + * This function is kept primarily for backwards compatibility. + * All new code should call libusb_handle_events_completed() or + * libusb_handle_events_timeout_completed() to avoid race conditions. + * + * \param ctx the context to operate on, or NULL for the default context + * \returns 0 on success, or a LIBUSB_ERROR code on failure + */ +int API_EXPORTED libusb_handle_events(libusb_context *ctx) +{ + struct timeval tv; + tv.tv_sec = 60; + tv.tv_usec = 0; + return libusb_handle_events_timeout_completed(ctx, &tv, NULL); +} + +/** \ingroup libusb_poll + * Handle any pending events in blocking mode. + * + * Like libusb_handle_events(), with the addition of a completed parameter + * to allow for race free waiting for the completion of a specific transfer. + * + * See libusb_handle_events_timeout_completed() for details on the completed + * parameter. + * + * \param ctx the context to operate on, or NULL for the default context + * \param completed pointer to completion integer to check, or NULL + * \returns 0 on success, or a LIBUSB_ERROR code on failure + * \ref libusb_mtasync + */ +int API_EXPORTED libusb_handle_events_completed(libusb_context *ctx, + int *completed) +{ + struct timeval tv; + tv.tv_sec = 60; + tv.tv_usec = 0; + return libusb_handle_events_timeout_completed(ctx, &tv, completed); +} + +/** \ingroup libusb_poll + * Handle any pending events by polling file descriptors, without checking if + * any other threads are already doing so. Must be called with the event lock + * held, see libusb_lock_events(). + * + * This function is designed to be called under the situation where you have + * taken the event lock and are calling poll()/select() directly on libusb's + * file descriptors (as opposed to using libusb_handle_events() or similar). + * You detect events on libusb's descriptors, so you then call this function + * with a zero timeout value (while still holding the event lock). + * + * \param ctx the context to operate on, or NULL for the default context + * \param tv the maximum time to block waiting for events, or zero for + * non-blocking mode + * \returns 0 on success, or a LIBUSB_ERROR code on failure + * \ref libusb_mtasync + */ +int API_EXPORTED libusb_handle_events_locked(libusb_context *ctx, + struct timeval *tv) +{ + int r; + struct timeval poll_timeout; + + USBI_GET_CONTEXT(ctx); + r = get_next_timeout(ctx, tv, &poll_timeout); + if (r) { + /* timeout already expired */ + return handle_timeouts(ctx); + } + + return handle_events(ctx, &poll_timeout); +} + +/** \ingroup libusb_poll + * Determines whether your application must apply special timing considerations + * when monitoring libusb's file descriptors. + * + * This function is only useful for applications which retrieve and poll + * libusb's file descriptors in their own main loop (\ref libusb_pollmain). + * + * Ordinarily, libusb's event handler needs to be called into at specific + * moments in time (in addition to times when there is activity on the file + * descriptor set). The usual approach is to use libusb_get_next_timeout() + * to learn about when the next timeout occurs, and to adjust your + * poll()/select() timeout accordingly so that you can make a call into the + * library at that time. + * + * Some platforms supported by libusb do not come with this baggage - any + * events relevant to timing will be represented by activity on the file + * descriptor set, and libusb_get_next_timeout() will always return 0. + * This function allows you to detect whether you are running on such a + * platform. + * + * Since v1.0.5. + * + * \param ctx the context to operate on, or NULL for the default context + * \returns 0 if you must call into libusb at times determined by + * libusb_get_next_timeout(), or 1 if all timeout events are handled internally + * or through regular activity on the file descriptors. + * \ref libusb_pollmain "Polling libusb file descriptors for event handling" + */ +int API_EXPORTED libusb_pollfds_handle_timeouts(libusb_context *ctx) +{ +#if defined(USBI_TIMERFD_AVAILABLE) + USBI_GET_CONTEXT(ctx); + return usbi_using_timerfd(ctx); +#else + UNUSED(ctx); + return 0; +#endif +} + +/** \ingroup libusb_poll + * Determine the next internal timeout that libusb needs to handle. You only + * need to use this function if you are calling poll() or select() or similar + * on libusb's file descriptors yourself - you do not need to use it if you + * are calling libusb_handle_events() or a variant directly. + * + * You should call this function in your main loop in order to determine how + * long to wait for select() or poll() to return results. libusb needs to be + * called into at this timeout, so you should use it as an upper bound on + * your select() or poll() call. + * + * When the timeout has expired, call into libusb_handle_events_timeout() + * (perhaps in non-blocking mode) so that libusb can handle the timeout. + * + * This function may return 1 (success) and an all-zero timeval. If this is + * the case, it indicates that libusb has a timeout that has already expired + * so you should call libusb_handle_events_timeout() or similar immediately. + * A return code of 0 indicates that there are no pending timeouts. + * + * On some platforms, this function will always returns 0 (no pending + * timeouts). See \ref polltime. + * + * \param ctx the context to operate on, or NULL for the default context + * \param tv output location for a relative time against the current + * clock in which libusb must be called into in order to process timeout events + * \returns 0 if there are no pending timeouts, 1 if a timeout was returned, + * or LIBUSB_ERROR_OTHER on failure + */ +int API_EXPORTED libusb_get_next_timeout(libusb_context *ctx, + struct timeval *tv) +{ + struct usbi_transfer *transfer; + struct timespec cur_ts; + struct timeval cur_tv; + struct timeval next_timeout = { 0, 0 }; + int r; + + USBI_GET_CONTEXT(ctx); + if (usbi_using_timerfd(ctx)) + return 0; + + usbi_mutex_lock(&ctx->flying_transfers_lock); + if (list_empty(&ctx->flying_transfers)) { + usbi_mutex_unlock(&ctx->flying_transfers_lock); + usbi_dbg("no URBs, no timeout!"); + return 0; + } + + /* find next transfer which hasn't already been processed as timed out */ + list_for_each_entry(transfer, &ctx->flying_transfers, list, struct usbi_transfer) { + if (transfer->timeout_flags & (USBI_TRANSFER_TIMEOUT_HANDLED | USBI_TRANSFER_OS_HANDLES_TIMEOUT)) + continue; + + /* if we've reached transfers of infinte timeout, we're done looking */ + if (!timerisset(&transfer->timeout)) + break; + + next_timeout = transfer->timeout; + break; + } + usbi_mutex_unlock(&ctx->flying_transfers_lock); + + if (!timerisset(&next_timeout)) { + usbi_dbg("no URB with timeout or all handled by OS; no timeout!"); + return 0; + } + + r = usbi_backend->clock_gettime(USBI_CLOCK_MONOTONIC, &cur_ts); + if (r < 0) { + usbi_err(ctx, "failed to read monotonic clock, errno=%d", errno); + return 0; + } + TIMESPEC_TO_TIMEVAL(&cur_tv, &cur_ts); + + if (!timercmp(&cur_tv, &next_timeout, <)) { + usbi_dbg("first timeout already expired"); + timerclear(tv); + } else { + timersub(&next_timeout, &cur_tv, tv); + usbi_dbg("next timeout in %d.%06ds", tv->tv_sec, tv->tv_usec); + } + + return 1; +} + +/** \ingroup libusb_poll + * Register notification functions for file descriptor additions/removals. + * These functions will be invoked for every new or removed file descriptor + * that libusb uses as an event source. + * + * To remove notifiers, pass NULL values for the function pointers. + * + * Note that file descriptors may have been added even before you register + * these notifiers (e.g. at libusb_init() time). + * + * Additionally, note that the removal notifier may be called during + * libusb_exit() (e.g. when it is closing file descriptors that were opened + * and added to the poll set at libusb_init() time). If you don't want this, + * remove the notifiers immediately before calling libusb_exit(). + * + * \param ctx the context to operate on, or NULL for the default context + * \param added_cb pointer to function for addition notifications + * \param removed_cb pointer to function for removal notifications + * \param user_data User data to be passed back to callbacks (useful for + * passing context information) + */ +void API_EXPORTED libusb_set_pollfd_notifiers(libusb_context *ctx, + libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb, + void *user_data) +{ + USBI_GET_CONTEXT(ctx); + ctx->fd_added_cb = added_cb; + ctx->fd_removed_cb = removed_cb; + ctx->fd_cb_user_data = user_data; +} + +/* + * Interrupt the iteration of the event handling thread, so that it picks + * up the fd change. Callers of this function must hold the event_data_lock. + */ +static void usbi_fd_notification(struct libusb_context *ctx) +{ + int pending_events; + + /* Record that there is a new poll fd. + * Only signal an event if there are no prior pending events. */ + pending_events = usbi_pending_events(ctx); + ctx->event_flags |= USBI_EVENT_POLLFDS_MODIFIED; + if (!pending_events) + usbi_signal_event(ctx); +} + +/* Add a file descriptor to the list of file descriptors to be monitored. + * events should be specified as a bitmask of events passed to poll(), e.g. + * POLLIN and/or POLLOUT. */ +int usbi_add_pollfd(struct libusb_context *ctx, int fd, short events) +{ + struct usbi_pollfd *ipollfd = malloc(sizeof(*ipollfd)); + if (!ipollfd) + return LIBUSB_ERROR_NO_MEM; + + usbi_dbg("add fd %d events %d", fd, events); + ipollfd->pollfd.fd = fd; + ipollfd->pollfd.events = events; + usbi_mutex_lock(&ctx->event_data_lock); + list_add_tail(&ipollfd->list, &ctx->ipollfds); + ctx->pollfds_cnt++; + usbi_fd_notification(ctx); + usbi_mutex_unlock(&ctx->event_data_lock); + + if (ctx->fd_added_cb) + ctx->fd_added_cb(fd, events, ctx->fd_cb_user_data); + return 0; +} + +/* Remove a file descriptor from the list of file descriptors to be polled. */ +void usbi_remove_pollfd(struct libusb_context *ctx, int fd) +{ + struct usbi_pollfd *ipollfd; + int found = 0; + + usbi_dbg("remove fd %d", fd); + usbi_mutex_lock(&ctx->event_data_lock); + list_for_each_entry(ipollfd, &ctx->ipollfds, list, struct usbi_pollfd) + if (ipollfd->pollfd.fd == fd) { + found = 1; + break; + } + + if (!found) { + usbi_dbg("couldn't find fd %d to remove", fd); + usbi_mutex_unlock(&ctx->event_data_lock); + return; + } + + list_del(&ipollfd->list); + ctx->pollfds_cnt--; + usbi_fd_notification(ctx); + usbi_mutex_unlock(&ctx->event_data_lock); + free(ipollfd); + if (ctx->fd_removed_cb) + ctx->fd_removed_cb(fd, ctx->fd_cb_user_data); +} + +/** \ingroup libusb_poll + * Retrieve a list of file descriptors that should be polled by your main loop + * as libusb event sources. + * + * The returned list is NULL-terminated and should be freed with libusb_free_pollfds() + * when done. The actual list contents must not be touched. + * + * As file descriptors are a Unix-specific concept, this function is not + * available on Windows and will always return NULL. + * + * \param ctx the context to operate on, or NULL for the default context + * \returns a NULL-terminated list of libusb_pollfd structures + * \returns NULL on error + * \returns NULL on platforms where the functionality is not available + */ +DEFAULT_VISIBILITY +const struct libusb_pollfd ** LIBUSB_CALL libusb_get_pollfds( + libusb_context *ctx) +{ +#ifndef OS_WINDOWS + struct libusb_pollfd **ret = NULL; + struct usbi_pollfd *ipollfd; + size_t i = 0; + USBI_GET_CONTEXT(ctx); + + usbi_mutex_lock(&ctx->event_data_lock); + + ret = calloc(ctx->pollfds_cnt + 1, sizeof(struct libusb_pollfd *)); + if (!ret) + goto out; + + list_for_each_entry(ipollfd, &ctx->ipollfds, list, struct usbi_pollfd) + ret[i++] = (struct libusb_pollfd *) ipollfd; + ret[ctx->pollfds_cnt] = NULL; + +out: + usbi_mutex_unlock(&ctx->event_data_lock); + return (const struct libusb_pollfd **) ret; +#else + usbi_err(ctx, "external polling of libusb's internal descriptors "\ + "is not yet supported on Windows platforms"); + return NULL; +#endif +} + +/** \ingroup libusb_poll + * Free a list of libusb_pollfd structures. This should be called for all + * pollfd lists allocated with libusb_get_pollfds(). + * + * Since version 1.0.20, \ref LIBUSB_API_VERSION >= 0x01000104 + * + * It is legal to call this function with a NULL pollfd list. In this case, + * the function will simply return safely. + * + * \param pollfds the list of libusb_pollfd structures to free + */ +void API_EXPORTED libusb_free_pollfds(const struct libusb_pollfd **pollfds) +{ + if (!pollfds) + return; + + free((void *)pollfds); +} + +/* Backends may call this from handle_events to report disconnection of a + * device. This function ensures transfers get cancelled appropriately. + * Callers of this function must hold the events_lock. + */ +void usbi_handle_disconnect(struct libusb_device_handle *dev_handle) +{ + struct usbi_transfer *cur; + struct usbi_transfer *to_cancel; + + usbi_dbg("device %d.%d", + dev_handle->dev->bus_number, dev_handle->dev->device_address); + + /* terminate all pending transfers with the LIBUSB_TRANSFER_NO_DEVICE + * status code. + * + * when we find a transfer for this device on the list, there are two + * possible scenarios: + * 1. the transfer is currently in-flight, in which case we terminate the + * transfer here + * 2. the transfer has been added to the flying transfer list by + * libusb_submit_transfer, has failed to submit and + * libusb_submit_transfer is waiting for us to release the + * flying_transfers_lock to remove it, so we ignore it + */ + + while (1) { + to_cancel = NULL; + usbi_mutex_lock(&HANDLE_CTX(dev_handle)->flying_transfers_lock); + list_for_each_entry(cur, &HANDLE_CTX(dev_handle)->flying_transfers, list, struct usbi_transfer) + if (USBI_TRANSFER_TO_LIBUSB_TRANSFER(cur)->dev_handle == dev_handle) { + usbi_mutex_lock(&cur->lock); + if (cur->state_flags & USBI_TRANSFER_IN_FLIGHT) + to_cancel = cur; + usbi_mutex_unlock(&cur->lock); + + if (to_cancel) + break; + } + usbi_mutex_unlock(&HANDLE_CTX(dev_handle)->flying_transfers_lock); + + if (!to_cancel) + break; + + usbi_dbg("cancelling transfer %p from disconnect", + USBI_TRANSFER_TO_LIBUSB_TRANSFER(to_cancel)); + + usbi_mutex_lock(&to_cancel->lock); + usbi_backend->clear_transfer_priv(to_cancel); + usbi_mutex_unlock(&to_cancel->lock); + usbi_handle_transfer_completion(to_cancel, LIBUSB_TRANSFER_NO_DEVICE); + } + +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/libusb.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/libusb.h new file mode 100644 index 000000000..c562690f9 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/libusb.h @@ -0,0 +1,2008 @@ +/* + * Public libusb header file + * Copyright © 2001 Johannes Erdfelt + * Copyright © 2007-2008 Daniel Drake + * Copyright © 2012 Pete Batard + * Copyright © 2012 Nathan Hjelm + * For more information, please visit: http://libusb.info + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LIBUSB_H +#define LIBUSB_H + +#ifdef _MSC_VER +/* on MS environments, the inline keyword is available in C++ only */ +#if !defined(__cplusplus) +#define inline __inline +#endif +/* ssize_t is also not available (copy/paste from MinGW) */ +#ifndef _SSIZE_T_DEFINED +#define _SSIZE_T_DEFINED +#undef ssize_t +#ifdef _WIN64 + typedef __int64 ssize_t; +#else + typedef int ssize_t; +#endif /* _WIN64 */ +#endif /* _SSIZE_T_DEFINED */ +#endif /* _MSC_VER */ + +/* stdint.h is not available on older MSVC */ +#if defined(_MSC_VER) && (_MSC_VER < 1600) && (!defined(_STDINT)) && (!defined(_STDINT_H)) +typedef unsigned __int8 uint8_t; +typedef unsigned __int16 uint16_t; +typedef unsigned __int32 uint32_t; +#else +#include +#endif + +#if !defined(_WIN32_WCE) +#include +#endif + +#if defined(__linux) || defined(__APPLE__) || defined(__CYGWIN__) || defined(__HAIKU__) +#include +#endif + +#include +#include + +/* 'interface' might be defined as a macro on Windows, so we need to + * undefine it so as not to break the current libusb API, because + * libusb_config_descriptor has an 'interface' member + * As this can be problematic if you include windows.h after libusb.h + * in your sources, we force windows.h to be included first. */ +#if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE) +#include +#if defined(interface) +#undef interface +#endif +#if !defined(__CYGWIN__) +#include +#endif +#endif + +#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) +#define LIBUSB_DEPRECATED_FOR(f) \ + __attribute__((deprecated("Use " #f " instead"))) +#else +#define LIBUSB_DEPRECATED_FOR(f) +#endif /* __GNUC__ */ + +/** \def LIBUSB_CALL + * \ingroup libusb_misc + * libusb's Windows calling convention. + * + * Under Windows, the selection of available compilers and configurations + * means that, unlike other platforms, there is not one true calling + * convention (calling convention: the manner in which parameters are + * passed to functions in the generated assembly code). + * + * Matching the Windows API itself, libusb uses the WINAPI convention (which + * translates to the stdcall convention) and guarantees that the + * library is compiled in this way. The public header file also includes + * appropriate annotations so that your own software will use the right + * convention, even if another convention is being used by default within + * your codebase. + * + * The one consideration that you must apply in your software is to mark + * all functions which you use as libusb callbacks with this LIBUSB_CALL + * annotation, so that they too get compiled for the correct calling + * convention. + * + * On non-Windows operating systems, this macro is defined as nothing. This + * means that you can apply it to your code without worrying about + * cross-platform compatibility. + */ +/* LIBUSB_CALL must be defined on both definition and declaration of libusb + * functions. You'd think that declaration would be enough, but cygwin will + * complain about conflicting types unless both are marked this way. + * The placement of this macro is important too; it must appear after the + * return type, before the function name. See internal documentation for + * API_EXPORTED. + */ +#if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE) +#define LIBUSB_CALL WINAPI +#else +#define LIBUSB_CALL +#endif + +/** \def LIBUSB_API_VERSION + * \ingroup libusb_misc + * libusb's API version. + * + * Since version 1.0.13, to help with feature detection, libusb defines + * a LIBUSB_API_VERSION macro that gets increased every time there is a + * significant change to the API, such as the introduction of a new call, + * the definition of a new macro/enum member, or any other element that + * libusb applications may want to detect at compilation time. + * + * The macro is typically used in an application as follows: + * \code + * #if defined(LIBUSB_API_VERSION) && (LIBUSB_API_VERSION >= 0x01001234) + * // Use one of the newer features from the libusb API + * #endif + * \endcode + * + * Internally, LIBUSB_API_VERSION is defined as follows: + * (libusb major << 24) | (libusb minor << 16) | (16 bit incremental) + */ +#define LIBUSB_API_VERSION 0x01000105 + +/* The following is kept for compatibility, but will be deprecated in the future */ +#define LIBUSBX_API_VERSION LIBUSB_API_VERSION + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \ingroup libusb_misc + * Convert a 16-bit value from host-endian to little-endian format. On + * little endian systems, this function does nothing. On big endian systems, + * the bytes are swapped. + * \param x the host-endian value to convert + * \returns the value in little-endian byte order + */ +static inline uint16_t libusb_cpu_to_le16(const uint16_t x) +{ + union { + uint8_t b8[2]; + uint16_t b16; + } _tmp; + _tmp.b8[1] = (uint8_t) (x >> 8); + _tmp.b8[0] = (uint8_t) (x & 0xff); + return _tmp.b16; +} + +/** \def libusb_le16_to_cpu + * \ingroup libusb_misc + * Convert a 16-bit value from little-endian to host-endian format. On + * little endian systems, this function does nothing. On big endian systems, + * the bytes are swapped. + * \param x the little-endian value to convert + * \returns the value in host-endian byte order + */ +#define libusb_le16_to_cpu libusb_cpu_to_le16 + +/* standard USB stuff */ + +/** \ingroup libusb_desc + * Device and/or Interface Class codes */ +enum libusb_class_code { + /** In the context of a \ref libusb_device_descriptor "device descriptor", + * this bDeviceClass value indicates that each interface specifies its + * own class information and all interfaces operate independently. + */ + LIBUSB_CLASS_PER_INTERFACE = 0, + + /** Audio class */ + LIBUSB_CLASS_AUDIO = 1, + + /** Communications class */ + LIBUSB_CLASS_COMM = 2, + + /** Human Interface Device class */ + LIBUSB_CLASS_HID = 3, + + /** Physical */ + LIBUSB_CLASS_PHYSICAL = 5, + + /** Printer class */ + LIBUSB_CLASS_PRINTER = 7, + + /** Image class */ + LIBUSB_CLASS_PTP = 6, /* legacy name from libusb-0.1 usb.h */ + LIBUSB_CLASS_IMAGE = 6, + + /** Mass storage class */ + LIBUSB_CLASS_MASS_STORAGE = 8, + + /** Hub class */ + LIBUSB_CLASS_HUB = 9, + + /** Data class */ + LIBUSB_CLASS_DATA = 10, + + /** Smart Card */ + LIBUSB_CLASS_SMART_CARD = 0x0b, + + /** Content Security */ + LIBUSB_CLASS_CONTENT_SECURITY = 0x0d, + + /** Video */ + LIBUSB_CLASS_VIDEO = 0x0e, + + /** Personal Healthcare */ + LIBUSB_CLASS_PERSONAL_HEALTHCARE = 0x0f, + + /** Diagnostic Device */ + LIBUSB_CLASS_DIAGNOSTIC_DEVICE = 0xdc, + + /** Wireless class */ + LIBUSB_CLASS_WIRELESS = 0xe0, + + /** Application class */ + LIBUSB_CLASS_APPLICATION = 0xfe, + + /** Class is vendor-specific */ + LIBUSB_CLASS_VENDOR_SPEC = 0xff +}; + +/** \ingroup libusb_desc + * Descriptor types as defined by the USB specification. */ +enum libusb_descriptor_type { + /** Device descriptor. See libusb_device_descriptor. */ + LIBUSB_DT_DEVICE = 0x01, + + /** Configuration descriptor. See libusb_config_descriptor. */ + LIBUSB_DT_CONFIG = 0x02, + + /** String descriptor */ + LIBUSB_DT_STRING = 0x03, + + /** Interface descriptor. See libusb_interface_descriptor. */ + LIBUSB_DT_INTERFACE = 0x04, + + /** Endpoint descriptor. See libusb_endpoint_descriptor. */ + LIBUSB_DT_ENDPOINT = 0x05, + + /** BOS descriptor */ + LIBUSB_DT_BOS = 0x0f, + + /** Device Capability descriptor */ + LIBUSB_DT_DEVICE_CAPABILITY = 0x10, + + /** HID descriptor */ + LIBUSB_DT_HID = 0x21, + + /** HID report descriptor */ + LIBUSB_DT_REPORT = 0x22, + + /** Physical descriptor */ + LIBUSB_DT_PHYSICAL = 0x23, + + /** Hub descriptor */ + LIBUSB_DT_HUB = 0x29, + + /** SuperSpeed Hub descriptor */ + LIBUSB_DT_SUPERSPEED_HUB = 0x2a, + + /** SuperSpeed Endpoint Companion descriptor */ + LIBUSB_DT_SS_ENDPOINT_COMPANION = 0x30 +}; + +/* Descriptor sizes per descriptor type */ +#define LIBUSB_DT_DEVICE_SIZE 18 +#define LIBUSB_DT_CONFIG_SIZE 9 +#define LIBUSB_DT_INTERFACE_SIZE 9 +#define LIBUSB_DT_ENDPOINT_SIZE 7 +#define LIBUSB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */ +#define LIBUSB_DT_HUB_NONVAR_SIZE 7 +#define LIBUSB_DT_SS_ENDPOINT_COMPANION_SIZE 6 +#define LIBUSB_DT_BOS_SIZE 5 +#define LIBUSB_DT_DEVICE_CAPABILITY_SIZE 3 + +/* BOS descriptor sizes */ +#define LIBUSB_BT_USB_2_0_EXTENSION_SIZE 7 +#define LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE 10 +#define LIBUSB_BT_CONTAINER_ID_SIZE 20 + +/* We unwrap the BOS => define its max size */ +#define LIBUSB_DT_BOS_MAX_SIZE ((LIBUSB_DT_BOS_SIZE) +\ + (LIBUSB_BT_USB_2_0_EXTENSION_SIZE) +\ + (LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE) +\ + (LIBUSB_BT_CONTAINER_ID_SIZE)) + +#define LIBUSB_ENDPOINT_ADDRESS_MASK 0x0f /* in bEndpointAddress */ +#define LIBUSB_ENDPOINT_DIR_MASK 0x80 + +/** \ingroup libusb_desc + * Endpoint direction. Values for bit 7 of the + * \ref libusb_endpoint_descriptor::bEndpointAddress "endpoint address" scheme. + */ +enum libusb_endpoint_direction { + /** In: device-to-host */ + LIBUSB_ENDPOINT_IN = 0x80, + + /** Out: host-to-device */ + LIBUSB_ENDPOINT_OUT = 0x00 +}; + +#define LIBUSB_TRANSFER_TYPE_MASK 0x03 /* in bmAttributes */ + +/** \ingroup libusb_desc + * Endpoint transfer type. Values for bits 0:1 of the + * \ref libusb_endpoint_descriptor::bmAttributes "endpoint attributes" field. + */ +enum libusb_transfer_type { + /** Control endpoint */ + LIBUSB_TRANSFER_TYPE_CONTROL = 0, + + /** Isochronous endpoint */ + LIBUSB_TRANSFER_TYPE_ISOCHRONOUS = 1, + + /** Bulk endpoint */ + LIBUSB_TRANSFER_TYPE_BULK = 2, + + /** Interrupt endpoint */ + LIBUSB_TRANSFER_TYPE_INTERRUPT = 3, + + /** Stream endpoint */ + LIBUSB_TRANSFER_TYPE_BULK_STREAM = 4, +}; + +/** \ingroup libusb_misc + * Standard requests, as defined in table 9-5 of the USB 3.0 specifications */ +enum libusb_standard_request { + /** Request status of the specific recipient */ + LIBUSB_REQUEST_GET_STATUS = 0x00, + + /** Clear or disable a specific feature */ + LIBUSB_REQUEST_CLEAR_FEATURE = 0x01, + + /* 0x02 is reserved */ + + /** Set or enable a specific feature */ + LIBUSB_REQUEST_SET_FEATURE = 0x03, + + /* 0x04 is reserved */ + + /** Set device address for all future accesses */ + LIBUSB_REQUEST_SET_ADDRESS = 0x05, + + /** Get the specified descriptor */ + LIBUSB_REQUEST_GET_DESCRIPTOR = 0x06, + + /** Used to update existing descriptors or add new descriptors */ + LIBUSB_REQUEST_SET_DESCRIPTOR = 0x07, + + /** Get the current device configuration value */ + LIBUSB_REQUEST_GET_CONFIGURATION = 0x08, + + /** Set device configuration */ + LIBUSB_REQUEST_SET_CONFIGURATION = 0x09, + + /** Return the selected alternate setting for the specified interface */ + LIBUSB_REQUEST_GET_INTERFACE = 0x0A, + + /** Select an alternate interface for the specified interface */ + LIBUSB_REQUEST_SET_INTERFACE = 0x0B, + + /** Set then report an endpoint's synchronization frame */ + LIBUSB_REQUEST_SYNCH_FRAME = 0x0C, + + /** Sets both the U1 and U2 Exit Latency */ + LIBUSB_REQUEST_SET_SEL = 0x30, + + /** Delay from the time a host transmits a packet to the time it is + * received by the device. */ + LIBUSB_SET_ISOCH_DELAY = 0x31, +}; + +/** \ingroup libusb_misc + * Request type bits of the + * \ref libusb_control_setup::bmRequestType "bmRequestType" field in control + * transfers. */ +enum libusb_request_type { + /** Standard */ + LIBUSB_REQUEST_TYPE_STANDARD = (0x00 << 5), + + /** Class */ + LIBUSB_REQUEST_TYPE_CLASS = (0x01 << 5), + + /** Vendor */ + LIBUSB_REQUEST_TYPE_VENDOR = (0x02 << 5), + + /** Reserved */ + LIBUSB_REQUEST_TYPE_RESERVED = (0x03 << 5) +}; + +/** \ingroup libusb_misc + * Recipient bits of the + * \ref libusb_control_setup::bmRequestType "bmRequestType" field in control + * transfers. Values 4 through 31 are reserved. */ +enum libusb_request_recipient { + /** Device */ + LIBUSB_RECIPIENT_DEVICE = 0x00, + + /** Interface */ + LIBUSB_RECIPIENT_INTERFACE = 0x01, + + /** Endpoint */ + LIBUSB_RECIPIENT_ENDPOINT = 0x02, + + /** Other */ + LIBUSB_RECIPIENT_OTHER = 0x03, +}; + +#define LIBUSB_ISO_SYNC_TYPE_MASK 0x0C + +/** \ingroup libusb_desc + * Synchronization type for isochronous endpoints. Values for bits 2:3 of the + * \ref libusb_endpoint_descriptor::bmAttributes "bmAttributes" field in + * libusb_endpoint_descriptor. + */ +enum libusb_iso_sync_type { + /** No synchronization */ + LIBUSB_ISO_SYNC_TYPE_NONE = 0, + + /** Asynchronous */ + LIBUSB_ISO_SYNC_TYPE_ASYNC = 1, + + /** Adaptive */ + LIBUSB_ISO_SYNC_TYPE_ADAPTIVE = 2, + + /** Synchronous */ + LIBUSB_ISO_SYNC_TYPE_SYNC = 3 +}; + +#define LIBUSB_ISO_USAGE_TYPE_MASK 0x30 + +/** \ingroup libusb_desc + * Usage type for isochronous endpoints. Values for bits 4:5 of the + * \ref libusb_endpoint_descriptor::bmAttributes "bmAttributes" field in + * libusb_endpoint_descriptor. + */ +enum libusb_iso_usage_type { + /** Data endpoint */ + LIBUSB_ISO_USAGE_TYPE_DATA = 0, + + /** Feedback endpoint */ + LIBUSB_ISO_USAGE_TYPE_FEEDBACK = 1, + + /** Implicit feedback Data endpoint */ + LIBUSB_ISO_USAGE_TYPE_IMPLICIT = 2, +}; + +/** \ingroup libusb_desc + * A structure representing the standard USB device descriptor. This + * descriptor is documented in section 9.6.1 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_device_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE LIBUSB_DT_DEVICE in this + * context. */ + uint8_t bDescriptorType; + + /** USB specification release number in binary-coded decimal. A value of + * 0x0200 indicates USB 2.0, 0x0110 indicates USB 1.1, etc. */ + uint16_t bcdUSB; + + /** USB-IF class code for the device. See \ref libusb_class_code. */ + uint8_t bDeviceClass; + + /** USB-IF subclass code for the device, qualified by the bDeviceClass + * value */ + uint8_t bDeviceSubClass; + + /** USB-IF protocol code for the device, qualified by the bDeviceClass and + * bDeviceSubClass values */ + uint8_t bDeviceProtocol; + + /** Maximum packet size for endpoint 0 */ + uint8_t bMaxPacketSize0; + + /** USB-IF vendor ID */ + uint16_t idVendor; + + /** USB-IF product ID */ + uint16_t idProduct; + + /** Device release number in binary-coded decimal */ + uint16_t bcdDevice; + + /** Index of string descriptor describing manufacturer */ + uint8_t iManufacturer; + + /** Index of string descriptor describing product */ + uint8_t iProduct; + + /** Index of string descriptor containing device serial number */ + uint8_t iSerialNumber; + + /** Number of possible configurations */ + uint8_t bNumConfigurations; +}; + +/** \ingroup libusb_desc + * A structure representing the standard USB endpoint descriptor. This + * descriptor is documented in section 9.6.6 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_endpoint_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_ENDPOINT LIBUSB_DT_ENDPOINT in + * this context. */ + uint8_t bDescriptorType; + + /** The address of the endpoint described by this descriptor. Bits 0:3 are + * the endpoint number. Bits 4:6 are reserved. Bit 7 indicates direction, + * see \ref libusb_endpoint_direction. + */ + uint8_t bEndpointAddress; + + /** Attributes which apply to the endpoint when it is configured using + * the bConfigurationValue. Bits 0:1 determine the transfer type and + * correspond to \ref libusb_transfer_type. Bits 2:3 are only used for + * isochronous endpoints and correspond to \ref libusb_iso_sync_type. + * Bits 4:5 are also only used for isochronous endpoints and correspond to + * \ref libusb_iso_usage_type. Bits 6:7 are reserved. + */ + uint8_t bmAttributes; + + /** Maximum packet size this endpoint is capable of sending/receiving. */ + uint16_t wMaxPacketSize; + + /** Interval for polling endpoint for data transfers. */ + uint8_t bInterval; + + /** For audio devices only: the rate at which synchronization feedback + * is provided. */ + uint8_t bRefresh; + + /** For audio devices only: the address if the synch endpoint */ + uint8_t bSynchAddress; + + /** Extra descriptors. If libusb encounters unknown endpoint descriptors, + * it will store them here, should you wish to parse them. */ + const unsigned char *extra; + + /** Length of the extra descriptors, in bytes. */ + int extra_length; +}; + +/** \ingroup libusb_desc + * A structure representing the standard USB interface descriptor. This + * descriptor is documented in section 9.6.5 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_interface_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_INTERFACE LIBUSB_DT_INTERFACE + * in this context. */ + uint8_t bDescriptorType; + + /** Number of this interface */ + uint8_t bInterfaceNumber; + + /** Value used to select this alternate setting for this interface */ + uint8_t bAlternateSetting; + + /** Number of endpoints used by this interface (excluding the control + * endpoint). */ + uint8_t bNumEndpoints; + + /** USB-IF class code for this interface. See \ref libusb_class_code. */ + uint8_t bInterfaceClass; + + /** USB-IF subclass code for this interface, qualified by the + * bInterfaceClass value */ + uint8_t bInterfaceSubClass; + + /** USB-IF protocol code for this interface, qualified by the + * bInterfaceClass and bInterfaceSubClass values */ + uint8_t bInterfaceProtocol; + + /** Index of string descriptor describing this interface */ + uint8_t iInterface; + + /** Array of endpoint descriptors. This length of this array is determined + * by the bNumEndpoints field. */ + const struct libusb_endpoint_descriptor *endpoint; + + /** Extra descriptors. If libusb encounters unknown interface descriptors, + * it will store them here, should you wish to parse them. */ + const unsigned char *extra; + + /** Length of the extra descriptors, in bytes. */ + int extra_length; +}; + +/** \ingroup libusb_desc + * A collection of alternate settings for a particular USB interface. + */ +struct libusb_interface { + /** Array of interface descriptors. The length of this array is determined + * by the num_altsetting field. */ + const struct libusb_interface_descriptor *altsetting; + + /** The number of alternate settings that belong to this interface */ + int num_altsetting; +}; + +/** \ingroup libusb_desc + * A structure representing the standard USB configuration descriptor. This + * descriptor is documented in section 9.6.3 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_config_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_CONFIG LIBUSB_DT_CONFIG + * in this context. */ + uint8_t bDescriptorType; + + /** Total length of data returned for this configuration */ + uint16_t wTotalLength; + + /** Number of interfaces supported by this configuration */ + uint8_t bNumInterfaces; + + /** Identifier value for this configuration */ + uint8_t bConfigurationValue; + + /** Index of string descriptor describing this configuration */ + uint8_t iConfiguration; + + /** Configuration characteristics */ + uint8_t bmAttributes; + + /** Maximum power consumption of the USB device from this bus in this + * configuration when the device is fully operation. Expressed in units + * of 2 mA when the device is operating in high-speed mode and in units + * of 8 mA when the device is operating in super-speed mode. */ + uint8_t MaxPower; + + /** Array of interfaces supported by this configuration. The length of + * this array is determined by the bNumInterfaces field. */ + const struct libusb_interface *interface; + + /** Extra descriptors. If libusb encounters unknown configuration + * descriptors, it will store them here, should you wish to parse them. */ + const unsigned char *extra; + + /** Length of the extra descriptors, in bytes. */ + int extra_length; +}; + +/** \ingroup libusb_desc + * A structure representing the superspeed endpoint companion + * descriptor. This descriptor is documented in section 9.6.7 of + * the USB 3.0 specification. All multiple-byte fields are represented in + * host-endian format. + */ +struct libusb_ss_endpoint_companion_descriptor { + + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_SS_ENDPOINT_COMPANION in + * this context. */ + uint8_t bDescriptorType; + + + /** The maximum number of packets the endpoint can send or + * receive as part of a burst. */ + uint8_t bMaxBurst; + + /** In bulk EP: bits 4:0 represents the maximum number of + * streams the EP supports. In isochronous EP: bits 1:0 + * represents the Mult - a zero based value that determines + * the maximum number of packets within a service interval */ + uint8_t bmAttributes; + + /** The total number of bytes this EP will transfer every + * service interval. valid only for periodic EPs. */ + uint16_t wBytesPerInterval; +}; + +/** \ingroup libusb_desc + * A generic representation of a BOS Device Capability descriptor. It is + * advised to check bDevCapabilityType and call the matching + * libusb_get_*_descriptor function to get a structure fully matching the type. + */ +struct libusb_bos_dev_capability_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY + * LIBUSB_DT_DEVICE_CAPABILITY in this context. */ + uint8_t bDescriptorType; + /** Device Capability type */ + uint8_t bDevCapabilityType; + /** Device Capability data (bLength - 3 bytes) */ + uint8_t dev_capability_data +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) + [] /* valid C99 code */ +#else + [0] /* non-standard, but usually working code */ +#endif + ; +}; + +/** \ingroup libusb_desc + * A structure representing the Binary Device Object Store (BOS) descriptor. + * This descriptor is documented in section 9.6.2 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_bos_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_BOS LIBUSB_DT_BOS + * in this context. */ + uint8_t bDescriptorType; + + /** Length of this descriptor and all of its sub descriptors */ + uint16_t wTotalLength; + + /** The number of separate device capability descriptors in + * the BOS */ + uint8_t bNumDeviceCaps; + + /** bNumDeviceCap Device Capability Descriptors */ + struct libusb_bos_dev_capability_descriptor *dev_capability +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) + [] /* valid C99 code */ +#else + [0] /* non-standard, but usually working code */ +#endif + ; +}; + +/** \ingroup libusb_desc + * A structure representing the USB 2.0 Extension descriptor + * This descriptor is documented in section 9.6.2.1 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_usb_2_0_extension_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY + * LIBUSB_DT_DEVICE_CAPABILITY in this context. */ + uint8_t bDescriptorType; + + /** Capability type. Will have value + * \ref libusb_capability_type::LIBUSB_BT_USB_2_0_EXTENSION + * LIBUSB_BT_USB_2_0_EXTENSION in this context. */ + uint8_t bDevCapabilityType; + + /** Bitmap encoding of supported device level features. + * A value of one in a bit location indicates a feature is + * supported; a value of zero indicates it is not supported. + * See \ref libusb_usb_2_0_extension_attributes. */ + uint32_t bmAttributes; +}; + +/** \ingroup libusb_desc + * A structure representing the SuperSpeed USB Device Capability descriptor + * This descriptor is documented in section 9.6.2.2 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_ss_usb_device_capability_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY + * LIBUSB_DT_DEVICE_CAPABILITY in this context. */ + uint8_t bDescriptorType; + + /** Capability type. Will have value + * \ref libusb_capability_type::LIBUSB_BT_SS_USB_DEVICE_CAPABILITY + * LIBUSB_BT_SS_USB_DEVICE_CAPABILITY in this context. */ + uint8_t bDevCapabilityType; + + /** Bitmap encoding of supported device level features. + * A value of one in a bit location indicates a feature is + * supported; a value of zero indicates it is not supported. + * See \ref libusb_ss_usb_device_capability_attributes. */ + uint8_t bmAttributes; + + /** Bitmap encoding of the speed supported by this device when + * operating in SuperSpeed mode. See \ref libusb_supported_speed. */ + uint16_t wSpeedSupported; + + /** The lowest speed at which all the functionality supported + * by the device is available to the user. For example if the + * device supports all its functionality when connected at + * full speed and above then it sets this value to 1. */ + uint8_t bFunctionalitySupport; + + /** U1 Device Exit Latency. */ + uint8_t bU1DevExitLat; + + /** U2 Device Exit Latency. */ + uint16_t bU2DevExitLat; +}; + +/** \ingroup libusb_desc + * A structure representing the Container ID descriptor. + * This descriptor is documented in section 9.6.2.3 of the USB 3.0 specification. + * All multiple-byte fields, except UUIDs, are represented in host-endian format. + */ +struct libusb_container_id_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY + * LIBUSB_DT_DEVICE_CAPABILITY in this context. */ + uint8_t bDescriptorType; + + /** Capability type. Will have value + * \ref libusb_capability_type::LIBUSB_BT_CONTAINER_ID + * LIBUSB_BT_CONTAINER_ID in this context. */ + uint8_t bDevCapabilityType; + + /** Reserved field */ + uint8_t bReserved; + + /** 128 bit UUID */ + uint8_t ContainerID[16]; +}; + +/** \ingroup libusb_asyncio + * Setup packet for control transfers. */ +struct libusb_control_setup { + /** Request type. Bits 0:4 determine recipient, see + * \ref libusb_request_recipient. Bits 5:6 determine type, see + * \ref libusb_request_type. Bit 7 determines data transfer direction, see + * \ref libusb_endpoint_direction. + */ + uint8_t bmRequestType; + + /** Request. If the type bits of bmRequestType are equal to + * \ref libusb_request_type::LIBUSB_REQUEST_TYPE_STANDARD + * "LIBUSB_REQUEST_TYPE_STANDARD" then this field refers to + * \ref libusb_standard_request. For other cases, use of this field is + * application-specific. */ + uint8_t bRequest; + + /** Value. Varies according to request */ + uint16_t wValue; + + /** Index. Varies according to request, typically used to pass an index + * or offset */ + uint16_t wIndex; + + /** Number of bytes to transfer */ + uint16_t wLength; +}; + +#define LIBUSB_CONTROL_SETUP_SIZE (sizeof(struct libusb_control_setup)) + +/* libusb */ + +struct libusb_context; +struct libusb_device; +struct libusb_device_handle; + +/** \ingroup libusb_lib + * Structure providing the version of the libusb runtime + */ +struct libusb_version { + /** Library major version. */ + const uint16_t major; + + /** Library minor version. */ + const uint16_t minor; + + /** Library micro version. */ + const uint16_t micro; + + /** Library nano version. */ + const uint16_t nano; + + /** Library release candidate suffix string, e.g. "-rc4". */ + const char *rc; + + /** For ABI compatibility only. */ + const char* describe; +}; + +/** \ingroup libusb_lib + * Structure representing a libusb session. The concept of individual libusb + * sessions allows for your program to use two libraries (or dynamically + * load two modules) which both independently use libusb. This will prevent + * interference between the individual libusb users - for example + * libusb_set_debug() will not affect the other user of the library, and + * libusb_exit() will not destroy resources that the other user is still + * using. + * + * Sessions are created by libusb_init() and destroyed through libusb_exit(). + * If your application is guaranteed to only ever include a single libusb + * user (i.e. you), you do not have to worry about contexts: pass NULL in + * every function call where a context is required. The default context + * will be used. + * + * For more information, see \ref libusb_contexts. + */ +typedef struct libusb_context libusb_context; + +/** \ingroup libusb_dev + * Structure representing a USB device detected on the system. This is an + * opaque type for which you are only ever provided with a pointer, usually + * originating from libusb_get_device_list(). + * + * Certain operations can be performed on a device, but in order to do any + * I/O you will have to first obtain a device handle using libusb_open(). + * + * Devices are reference counted with libusb_ref_device() and + * libusb_unref_device(), and are freed when the reference count reaches 0. + * New devices presented by libusb_get_device_list() have a reference count of + * 1, and libusb_free_device_list() can optionally decrease the reference count + * on all devices in the list. libusb_open() adds another reference which is + * later destroyed by libusb_close(). + */ +typedef struct libusb_device libusb_device; + + +/** \ingroup libusb_dev + * Structure representing a handle on a USB device. This is an opaque type for + * which you are only ever provided with a pointer, usually originating from + * libusb_open(). + * + * A device handle is used to perform I/O and other operations. When finished + * with a device handle, you should call libusb_close(). + */ +typedef struct libusb_device_handle libusb_device_handle; + +/** \ingroup libusb_dev + * Speed codes. Indicates the speed at which the device is operating. + */ +enum libusb_speed { + /** The OS doesn't report or know the device speed. */ + LIBUSB_SPEED_UNKNOWN = 0, + + /** The device is operating at low speed (1.5MBit/s). */ + LIBUSB_SPEED_LOW = 1, + + /** The device is operating at full speed (12MBit/s). */ + LIBUSB_SPEED_FULL = 2, + + /** The device is operating at high speed (480MBit/s). */ + LIBUSB_SPEED_HIGH = 3, + + /** The device is operating at super speed (5000MBit/s). */ + LIBUSB_SPEED_SUPER = 4, +}; + +/** \ingroup libusb_dev + * Supported speeds (wSpeedSupported) bitfield. Indicates what + * speeds the device supports. + */ +enum libusb_supported_speed { + /** Low speed operation supported (1.5MBit/s). */ + LIBUSB_LOW_SPEED_OPERATION = 1, + + /** Full speed operation supported (12MBit/s). */ + LIBUSB_FULL_SPEED_OPERATION = 2, + + /** High speed operation supported (480MBit/s). */ + LIBUSB_HIGH_SPEED_OPERATION = 4, + + /** Superspeed operation supported (5000MBit/s). */ + LIBUSB_SUPER_SPEED_OPERATION = 8, +}; + +/** \ingroup libusb_dev + * Masks for the bits of the + * \ref libusb_usb_2_0_extension_descriptor::bmAttributes "bmAttributes" field + * of the USB 2.0 Extension descriptor. + */ +enum libusb_usb_2_0_extension_attributes { + /** Supports Link Power Management (LPM) */ + LIBUSB_BM_LPM_SUPPORT = 2, +}; + +/** \ingroup libusb_dev + * Masks for the bits of the + * \ref libusb_ss_usb_device_capability_descriptor::bmAttributes "bmAttributes" field + * field of the SuperSpeed USB Device Capability descriptor. + */ +enum libusb_ss_usb_device_capability_attributes { + /** Supports Latency Tolerance Messages (LTM) */ + LIBUSB_BM_LTM_SUPPORT = 2, +}; + +/** \ingroup libusb_dev + * USB capability types + */ +enum libusb_bos_type { + /** Wireless USB device capability */ + LIBUSB_BT_WIRELESS_USB_DEVICE_CAPABILITY = 1, + + /** USB 2.0 extensions */ + LIBUSB_BT_USB_2_0_EXTENSION = 2, + + /** SuperSpeed USB device capability */ + LIBUSB_BT_SS_USB_DEVICE_CAPABILITY = 3, + + /** Container ID type */ + LIBUSB_BT_CONTAINER_ID = 4, +}; + +/** \ingroup libusb_misc + * Error codes. Most libusb functions return 0 on success or one of these + * codes on failure. + * You can call libusb_error_name() to retrieve a string representation of an + * error code or libusb_strerror() to get an end-user suitable description of + * an error code. + */ +enum libusb_error { + /** Success (no error) */ + LIBUSB_SUCCESS = 0, + + /** Input/output error */ + LIBUSB_ERROR_IO = -1, + + /** Invalid parameter */ + LIBUSB_ERROR_INVALID_PARAM = -2, + + /** Access denied (insufficient permissions) */ + LIBUSB_ERROR_ACCESS = -3, + + /** No such device (it may have been disconnected) */ + LIBUSB_ERROR_NO_DEVICE = -4, + + /** Entity not found */ + LIBUSB_ERROR_NOT_FOUND = -5, + + /** Resource busy */ + LIBUSB_ERROR_BUSY = -6, + + /** Operation timed out */ + LIBUSB_ERROR_TIMEOUT = -7, + + /** Overflow */ + LIBUSB_ERROR_OVERFLOW = -8, + + /** Pipe error */ + LIBUSB_ERROR_PIPE = -9, + + /** System call interrupted (perhaps due to signal) */ + LIBUSB_ERROR_INTERRUPTED = -10, + + /** Insufficient memory */ + LIBUSB_ERROR_NO_MEM = -11, + + /** Operation not supported or unimplemented on this platform */ + LIBUSB_ERROR_NOT_SUPPORTED = -12, + + /* NB: Remember to update LIBUSB_ERROR_COUNT below as well as the + message strings in strerror.c when adding new error codes here. */ + + /** Other error */ + LIBUSB_ERROR_OTHER = -99, +}; + +/* Total number of error codes in enum libusb_error */ +#define LIBUSB_ERROR_COUNT 14 + +/** \ingroup libusb_asyncio + * Transfer status codes */ +enum libusb_transfer_status { + /** Transfer completed without error. Note that this does not indicate + * that the entire amount of requested data was transferred. */ + LIBUSB_TRANSFER_COMPLETED, + + /** Transfer failed */ + LIBUSB_TRANSFER_ERROR, + + /** Transfer timed out */ + LIBUSB_TRANSFER_TIMED_OUT, + + /** Transfer was cancelled */ + LIBUSB_TRANSFER_CANCELLED, + + /** For bulk/interrupt endpoints: halt condition detected (endpoint + * stalled). For control endpoints: control request not supported. */ + LIBUSB_TRANSFER_STALL, + + /** Device was disconnected */ + LIBUSB_TRANSFER_NO_DEVICE, + + /** Device sent more data than requested */ + LIBUSB_TRANSFER_OVERFLOW, + + /* NB! Remember to update libusb_error_name() + when adding new status codes here. */ +}; + +/** \ingroup libusb_asyncio + * libusb_transfer.flags values */ +enum libusb_transfer_flags { + /** Report short frames as errors */ + LIBUSB_TRANSFER_SHORT_NOT_OK = 1<<0, + + /** Automatically free() transfer buffer during libusb_free_transfer(). + * Note that buffers allocated with libusb_dev_mem_alloc() should not + * be attempted freed in this way, since free() is not an appropriate + * way to release such memory. */ + LIBUSB_TRANSFER_FREE_BUFFER = 1<<1, + + /** Automatically call libusb_free_transfer() after callback returns. + * If this flag is set, it is illegal to call libusb_free_transfer() + * from your transfer callback, as this will result in a double-free + * when this flag is acted upon. */ + LIBUSB_TRANSFER_FREE_TRANSFER = 1<<2, + + /** Terminate transfers that are a multiple of the endpoint's + * wMaxPacketSize with an extra zero length packet. This is useful + * when a device protocol mandates that each logical request is + * terminated by an incomplete packet (i.e. the logical requests are + * not separated by other means). + * + * This flag only affects host-to-device transfers to bulk and interrupt + * endpoints. In other situations, it is ignored. + * + * This flag only affects transfers with a length that is a multiple of + * the endpoint's wMaxPacketSize. On transfers of other lengths, this + * flag has no effect. Therefore, if you are working with a device that + * needs a ZLP whenever the end of the logical request falls on a packet + * boundary, then it is sensible to set this flag on every + * transfer (you do not have to worry about only setting it on transfers + * that end on the boundary). + * + * This flag is currently only supported on Linux. + * On other systems, libusb_submit_transfer() will return + * LIBUSB_ERROR_NOT_SUPPORTED for every transfer where this flag is set. + * + * Available since libusb-1.0.9. + */ + LIBUSB_TRANSFER_ADD_ZERO_PACKET = 1 << 3, +}; + +/** \ingroup libusb_asyncio + * Isochronous packet descriptor. */ +struct libusb_iso_packet_descriptor { + /** Length of data to request in this packet */ + unsigned int length; + + /** Amount of data that was actually transferred */ + unsigned int actual_length; + + /** Status code for this packet */ + enum libusb_transfer_status status; +}; + +struct libusb_transfer; + +/** \ingroup libusb_asyncio + * Asynchronous transfer callback function type. When submitting asynchronous + * transfers, you pass a pointer to a callback function of this type via the + * \ref libusb_transfer::callback "callback" member of the libusb_transfer + * structure. libusb will call this function later, when the transfer has + * completed or failed. See \ref libusb_asyncio for more information. + * \param transfer The libusb_transfer struct the callback function is being + * notified about. + */ +typedef void (LIBUSB_CALL *libusb_transfer_cb_fn)(struct libusb_transfer *transfer); + +/** \ingroup libusb_asyncio + * The generic USB transfer structure. The user populates this structure and + * then submits it in order to request a transfer. After the transfer has + * completed, the library populates the transfer with the results and passes + * it back to the user. + */ +struct libusb_transfer { + /** Handle of the device that this transfer will be submitted to */ + libusb_device_handle *dev_handle; + + /** A bitwise OR combination of \ref libusb_transfer_flags. */ + uint8_t flags; + + /** Address of the endpoint where this transfer will be sent. */ + unsigned char endpoint; + + /** Type of the endpoint from \ref libusb_transfer_type */ + unsigned char type; + + /** Timeout for this transfer in milliseconds. A value of 0 indicates no + * timeout. */ + unsigned int timeout; + + /** The status of the transfer. Read-only, and only for use within + * transfer callback function. + * + * If this is an isochronous transfer, this field may read COMPLETED even + * if there were errors in the frames. Use the + * \ref libusb_iso_packet_descriptor::status "status" field in each packet + * to determine if errors occurred. */ + enum libusb_transfer_status status; + + /** Length of the data buffer */ + int length; + + /** Actual length of data that was transferred. Read-only, and only for + * use within transfer callback function. Not valid for isochronous + * endpoint transfers. */ + int actual_length; + + /** Callback function. This will be invoked when the transfer completes, + * fails, or is cancelled. */ + libusb_transfer_cb_fn callback; + + /** User context data to pass to the callback function. */ + void *user_data; + + /** Data buffer */ + unsigned char *buffer; + + /** Number of isochronous packets. Only used for I/O with isochronous + * endpoints. */ + int num_iso_packets; + + /** Isochronous packet descriptors, for isochronous transfers only. */ + struct libusb_iso_packet_descriptor iso_packet_desc +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) + [] /* valid C99 code */ +#else + [0] /* non-standard, but usually working code */ +#endif + ; +}; + +/** \ingroup libusb_misc + * Capabilities supported by an instance of libusb on the current running + * platform. Test if the loaded library supports a given capability by calling + * \ref libusb_has_capability(). + */ +enum libusb_capability { + /** The libusb_has_capability() API is available. */ + LIBUSB_CAP_HAS_CAPABILITY = 0x0000, + /** Hotplug support is available on this platform. */ + LIBUSB_CAP_HAS_HOTPLUG = 0x0001, + /** The library can access HID devices without requiring user intervention. + * Note that before being able to actually access an HID device, you may + * still have to call additional libusb functions such as + * \ref libusb_detach_kernel_driver(). */ + LIBUSB_CAP_HAS_HID_ACCESS = 0x0100, + /** The library supports detaching of the default USB driver, using + * \ref libusb_detach_kernel_driver(), if one is set by the OS kernel */ + LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER = 0x0101 +}; + +/** \ingroup libusb_lib + * Log message levels. + * - LIBUSB_LOG_LEVEL_NONE (0) : no messages ever printed by the library (default) + * - LIBUSB_LOG_LEVEL_ERROR (1) : error messages are printed to stderr + * - LIBUSB_LOG_LEVEL_WARNING (2) : warning and error messages are printed to stderr + * - LIBUSB_LOG_LEVEL_INFO (3) : informational messages are printed to stdout, warning + * and error messages are printed to stderr + * - LIBUSB_LOG_LEVEL_DEBUG (4) : debug and informational messages are printed to stdout, + * warnings and errors to stderr + */ +enum libusb_log_level { + LIBUSB_LOG_LEVEL_NONE = 0, + LIBUSB_LOG_LEVEL_ERROR, + LIBUSB_LOG_LEVEL_WARNING, + LIBUSB_LOG_LEVEL_INFO, + LIBUSB_LOG_LEVEL_DEBUG, +}; + +int LIBUSB_CALL libusb_init(libusb_context **ctx); +void LIBUSB_CALL libusb_exit(libusb_context *ctx); +void LIBUSB_CALL libusb_set_debug(libusb_context *ctx, int level); +const struct libusb_version * LIBUSB_CALL libusb_get_version(void); +int LIBUSB_CALL libusb_has_capability(uint32_t capability); +const char * LIBUSB_CALL libusb_error_name(int errcode); +int LIBUSB_CALL libusb_setlocale(const char *locale); +const char * LIBUSB_CALL libusb_strerror(enum libusb_error errcode); + +ssize_t LIBUSB_CALL libusb_get_device_list(libusb_context *ctx, + libusb_device ***list); +void LIBUSB_CALL libusb_free_device_list(libusb_device **list, + int unref_devices); +libusb_device * LIBUSB_CALL libusb_ref_device(libusb_device *dev); +void LIBUSB_CALL libusb_unref_device(libusb_device *dev); + +int LIBUSB_CALL libusb_get_configuration(libusb_device_handle *dev, + int *config); +int LIBUSB_CALL libusb_get_device_descriptor(libusb_device *dev, + struct libusb_device_descriptor *desc); +int LIBUSB_CALL libusb_get_active_config_descriptor(libusb_device *dev, + struct libusb_config_descriptor **config); +int LIBUSB_CALL libusb_get_config_descriptor(libusb_device *dev, + uint8_t config_index, struct libusb_config_descriptor **config); +int LIBUSB_CALL libusb_get_config_descriptor_by_value(libusb_device *dev, + uint8_t bConfigurationValue, struct libusb_config_descriptor **config); +void LIBUSB_CALL libusb_free_config_descriptor( + struct libusb_config_descriptor *config); +int LIBUSB_CALL libusb_get_ss_endpoint_companion_descriptor( + struct libusb_context *ctx, + const struct libusb_endpoint_descriptor *endpoint, + struct libusb_ss_endpoint_companion_descriptor **ep_comp); +void LIBUSB_CALL libusb_free_ss_endpoint_companion_descriptor( + struct libusb_ss_endpoint_companion_descriptor *ep_comp); +int LIBUSB_CALL libusb_get_bos_descriptor(libusb_device_handle *dev_handle, + struct libusb_bos_descriptor **bos); +void LIBUSB_CALL libusb_free_bos_descriptor(struct libusb_bos_descriptor *bos); +int LIBUSB_CALL libusb_get_usb_2_0_extension_descriptor( + struct libusb_context *ctx, + struct libusb_bos_dev_capability_descriptor *dev_cap, + struct libusb_usb_2_0_extension_descriptor **usb_2_0_extension); +void LIBUSB_CALL libusb_free_usb_2_0_extension_descriptor( + struct libusb_usb_2_0_extension_descriptor *usb_2_0_extension); +int LIBUSB_CALL libusb_get_ss_usb_device_capability_descriptor( + struct libusb_context *ctx, + struct libusb_bos_dev_capability_descriptor *dev_cap, + struct libusb_ss_usb_device_capability_descriptor **ss_usb_device_cap); +void LIBUSB_CALL libusb_free_ss_usb_device_capability_descriptor( + struct libusb_ss_usb_device_capability_descriptor *ss_usb_device_cap); +int LIBUSB_CALL libusb_get_container_id_descriptor(struct libusb_context *ctx, + struct libusb_bos_dev_capability_descriptor *dev_cap, + struct libusb_container_id_descriptor **container_id); +void LIBUSB_CALL libusb_free_container_id_descriptor( + struct libusb_container_id_descriptor *container_id); +uint8_t LIBUSB_CALL libusb_get_bus_number(libusb_device *dev); +uint8_t LIBUSB_CALL libusb_get_port_number(libusb_device *dev); +int LIBUSB_CALL libusb_get_port_numbers(libusb_device *dev, uint8_t* port_numbers, int port_numbers_len); +LIBUSB_DEPRECATED_FOR(libusb_get_port_numbers) +int LIBUSB_CALL libusb_get_port_path(libusb_context *ctx, libusb_device *dev, uint8_t* path, uint8_t path_length); +libusb_device * LIBUSB_CALL libusb_get_parent(libusb_device *dev); +uint8_t LIBUSB_CALL libusb_get_device_address(libusb_device *dev); +int LIBUSB_CALL libusb_get_device_speed(libusb_device *dev); +int LIBUSB_CALL libusb_get_max_packet_size(libusb_device *dev, + unsigned char endpoint); +int LIBUSB_CALL libusb_get_max_iso_packet_size(libusb_device *dev, + unsigned char endpoint); + +int LIBUSB_CALL libusb_open(libusb_device *dev, libusb_device_handle **dev_handle); +void LIBUSB_CALL libusb_close(libusb_device_handle *dev_handle); +libusb_device * LIBUSB_CALL libusb_get_device(libusb_device_handle *dev_handle); + +int LIBUSB_CALL libusb_set_configuration(libusb_device_handle *dev_handle, + int configuration); +int LIBUSB_CALL libusb_claim_interface(libusb_device_handle *dev_handle, + int interface_number); +int LIBUSB_CALL libusb_release_interface(libusb_device_handle *dev_handle, + int interface_number); + +libusb_device_handle * LIBUSB_CALL libusb_open_device_with_vid_pid( + libusb_context *ctx, uint16_t vendor_id, uint16_t product_id); + +int LIBUSB_CALL libusb_set_interface_alt_setting(libusb_device_handle *dev_handle, + int interface_number, int alternate_setting); +int LIBUSB_CALL libusb_clear_halt(libusb_device_handle *dev_handle, + unsigned char endpoint); +int LIBUSB_CALL libusb_reset_device(libusb_device_handle *dev_handle); + +int LIBUSB_CALL libusb_alloc_streams(libusb_device_handle *dev_handle, + uint32_t num_streams, unsigned char *endpoints, int num_endpoints); +int LIBUSB_CALL libusb_free_streams(libusb_device_handle *dev_handle, + unsigned char *endpoints, int num_endpoints); + +unsigned char * LIBUSB_CALL libusb_dev_mem_alloc(libusb_device_handle *dev_handle, + size_t length); +int LIBUSB_CALL libusb_dev_mem_free(libusb_device_handle *dev_handle, + unsigned char *buffer, size_t length); + +int LIBUSB_CALL libusb_kernel_driver_active(libusb_device_handle *dev_handle, + int interface_number); +int LIBUSB_CALL libusb_detach_kernel_driver(libusb_device_handle *dev_handle, + int interface_number); +int LIBUSB_CALL libusb_attach_kernel_driver(libusb_device_handle *dev_handle, + int interface_number); +int LIBUSB_CALL libusb_set_auto_detach_kernel_driver( + libusb_device_handle *dev_handle, int enable); + +/* async I/O */ + +/** \ingroup libusb_asyncio + * Get the data section of a control transfer. This convenience function is here + * to remind you that the data does not start until 8 bytes into the actual + * buffer, as the setup packet comes first. + * + * Calling this function only makes sense from a transfer callback function, + * or situations where you have already allocated a suitably sized buffer at + * transfer->buffer. + * + * \param transfer a transfer + * \returns pointer to the first byte of the data section + */ +static inline unsigned char *libusb_control_transfer_get_data( + struct libusb_transfer *transfer) +{ + return transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE; +} + +/** \ingroup libusb_asyncio + * Get the control setup packet of a control transfer. This convenience + * function is here to remind you that the control setup occupies the first + * 8 bytes of the transfer data buffer. + * + * Calling this function only makes sense from a transfer callback function, + * or situations where you have already allocated a suitably sized buffer at + * transfer->buffer. + * + * \param transfer a transfer + * \returns a casted pointer to the start of the transfer data buffer + */ +static inline struct libusb_control_setup *libusb_control_transfer_get_setup( + struct libusb_transfer *transfer) +{ + return (struct libusb_control_setup *)(void *) transfer->buffer; +} + +/** \ingroup libusb_asyncio + * Helper function to populate the setup packet (first 8 bytes of the data + * buffer) for a control transfer. The wIndex, wValue and wLength values should + * be given in host-endian byte order. + * + * \param buffer buffer to output the setup packet into + * This pointer must be aligned to at least 2 bytes boundary. + * \param bmRequestType see the + * \ref libusb_control_setup::bmRequestType "bmRequestType" field of + * \ref libusb_control_setup + * \param bRequest see the + * \ref libusb_control_setup::bRequest "bRequest" field of + * \ref libusb_control_setup + * \param wValue see the + * \ref libusb_control_setup::wValue "wValue" field of + * \ref libusb_control_setup + * \param wIndex see the + * \ref libusb_control_setup::wIndex "wIndex" field of + * \ref libusb_control_setup + * \param wLength see the + * \ref libusb_control_setup::wLength "wLength" field of + * \ref libusb_control_setup + */ +static inline void libusb_fill_control_setup(unsigned char *buffer, + uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, + uint16_t wLength) +{ + struct libusb_control_setup *setup = (struct libusb_control_setup *)(void *) buffer; + setup->bmRequestType = bmRequestType; + setup->bRequest = bRequest; + setup->wValue = libusb_cpu_to_le16(wValue); + setup->wIndex = libusb_cpu_to_le16(wIndex); + setup->wLength = libusb_cpu_to_le16(wLength); +} + +struct libusb_transfer * LIBUSB_CALL libusb_alloc_transfer(int iso_packets); +int LIBUSB_CALL libusb_submit_transfer(struct libusb_transfer *transfer); +int LIBUSB_CALL libusb_cancel_transfer(struct libusb_transfer *transfer); +void LIBUSB_CALL libusb_free_transfer(struct libusb_transfer *transfer); +void LIBUSB_CALL libusb_transfer_set_stream_id( + struct libusb_transfer *transfer, uint32_t stream_id); +uint32_t LIBUSB_CALL libusb_transfer_get_stream_id( + struct libusb_transfer *transfer); + +/** \ingroup libusb_asyncio + * Helper function to populate the required \ref libusb_transfer fields + * for a control transfer. + * + * If you pass a transfer buffer to this function, the first 8 bytes will + * be interpreted as a control setup packet, and the wLength field will be + * used to automatically populate the \ref libusb_transfer::length "length" + * field of the transfer. Therefore the recommended approach is: + * -# Allocate a suitably sized data buffer (including space for control setup) + * -# Call libusb_fill_control_setup() + * -# If this is a host-to-device transfer with a data stage, put the data + * in place after the setup packet + * -# Call this function + * -# Call libusb_submit_transfer() + * + * It is also legal to pass a NULL buffer to this function, in which case this + * function will not attempt to populate the length field. Remember that you + * must then populate the buffer and length fields later. + * + * \param transfer the transfer to populate + * \param dev_handle handle of the device that will handle the transfer + * \param buffer data buffer. If provided, this function will interpret the + * first 8 bytes as a setup packet and infer the transfer length from that. + * This pointer must be aligned to at least 2 bytes boundary. + * \param callback callback function to be invoked on transfer completion + * \param user_data user data to pass to callback function + * \param timeout timeout for the transfer in milliseconds + */ +static inline void libusb_fill_control_transfer( + struct libusb_transfer *transfer, libusb_device_handle *dev_handle, + unsigned char *buffer, libusb_transfer_cb_fn callback, void *user_data, + unsigned int timeout) +{ + struct libusb_control_setup *setup = (struct libusb_control_setup *)(void *) buffer; + transfer->dev_handle = dev_handle; + transfer->endpoint = 0; + transfer->type = LIBUSB_TRANSFER_TYPE_CONTROL; + transfer->timeout = timeout; + transfer->buffer = buffer; + if (setup) + transfer->length = (int) (LIBUSB_CONTROL_SETUP_SIZE + + libusb_le16_to_cpu(setup->wLength)); + transfer->user_data = user_data; + transfer->callback = callback; +} + +/** \ingroup libusb_asyncio + * Helper function to populate the required \ref libusb_transfer fields + * for a bulk transfer. + * + * \param transfer the transfer to populate + * \param dev_handle handle of the device that will handle the transfer + * \param endpoint address of the endpoint where this transfer will be sent + * \param buffer data buffer + * \param length length of data buffer + * \param callback callback function to be invoked on transfer completion + * \param user_data user data to pass to callback function + * \param timeout timeout for the transfer in milliseconds + */ +static inline void libusb_fill_bulk_transfer(struct libusb_transfer *transfer, + libusb_device_handle *dev_handle, unsigned char endpoint, + unsigned char *buffer, int length, libusb_transfer_cb_fn callback, + void *user_data, unsigned int timeout) +{ + transfer->dev_handle = dev_handle; + transfer->endpoint = endpoint; + transfer->type = LIBUSB_TRANSFER_TYPE_BULK; + transfer->timeout = timeout; + transfer->buffer = buffer; + transfer->length = length; + transfer->user_data = user_data; + transfer->callback = callback; +} + +/** \ingroup libusb_asyncio + * Helper function to populate the required \ref libusb_transfer fields + * for a bulk transfer using bulk streams. + * + * Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103 + * + * \param transfer the transfer to populate + * \param dev_handle handle of the device that will handle the transfer + * \param endpoint address of the endpoint where this transfer will be sent + * \param stream_id bulk stream id for this transfer + * \param buffer data buffer + * \param length length of data buffer + * \param callback callback function to be invoked on transfer completion + * \param user_data user data to pass to callback function + * \param timeout timeout for the transfer in milliseconds + */ +static inline void libusb_fill_bulk_stream_transfer( + struct libusb_transfer *transfer, libusb_device_handle *dev_handle, + unsigned char endpoint, uint32_t stream_id, + unsigned char *buffer, int length, libusb_transfer_cb_fn callback, + void *user_data, unsigned int timeout) +{ + libusb_fill_bulk_transfer(transfer, dev_handle, endpoint, buffer, + length, callback, user_data, timeout); + transfer->type = LIBUSB_TRANSFER_TYPE_BULK_STREAM; + libusb_transfer_set_stream_id(transfer, stream_id); +} + +/** \ingroup libusb_asyncio + * Helper function to populate the required \ref libusb_transfer fields + * for an interrupt transfer. + * + * \param transfer the transfer to populate + * \param dev_handle handle of the device that will handle the transfer + * \param endpoint address of the endpoint where this transfer will be sent + * \param buffer data buffer + * \param length length of data buffer + * \param callback callback function to be invoked on transfer completion + * \param user_data user data to pass to callback function + * \param timeout timeout for the transfer in milliseconds + */ +static inline void libusb_fill_interrupt_transfer( + struct libusb_transfer *transfer, libusb_device_handle *dev_handle, + unsigned char endpoint, unsigned char *buffer, int length, + libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout) +{ + transfer->dev_handle = dev_handle; + transfer->endpoint = endpoint; + transfer->type = LIBUSB_TRANSFER_TYPE_INTERRUPT; + transfer->timeout = timeout; + transfer->buffer = buffer; + transfer->length = length; + transfer->user_data = user_data; + transfer->callback = callback; +} + +/** \ingroup libusb_asyncio + * Helper function to populate the required \ref libusb_transfer fields + * for an isochronous transfer. + * + * \param transfer the transfer to populate + * \param dev_handle handle of the device that will handle the transfer + * \param endpoint address of the endpoint where this transfer will be sent + * \param buffer data buffer + * \param length length of data buffer + * \param num_iso_packets the number of isochronous packets + * \param callback callback function to be invoked on transfer completion + * \param user_data user data to pass to callback function + * \param timeout timeout for the transfer in milliseconds + */ +static inline void libusb_fill_iso_transfer(struct libusb_transfer *transfer, + libusb_device_handle *dev_handle, unsigned char endpoint, + unsigned char *buffer, int length, int num_iso_packets, + libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout) +{ + transfer->dev_handle = dev_handle; + transfer->endpoint = endpoint; + transfer->type = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS; + transfer->timeout = timeout; + transfer->buffer = buffer; + transfer->length = length; + transfer->num_iso_packets = num_iso_packets; + transfer->user_data = user_data; + transfer->callback = callback; +} + +/** \ingroup libusb_asyncio + * Convenience function to set the length of all packets in an isochronous + * transfer, based on the num_iso_packets field in the transfer structure. + * + * \param transfer a transfer + * \param length the length to set in each isochronous packet descriptor + * \see libusb_get_max_packet_size() + */ +static inline void libusb_set_iso_packet_lengths( + struct libusb_transfer *transfer, unsigned int length) +{ + int i; + for (i = 0; i < transfer->num_iso_packets; i++) + transfer->iso_packet_desc[i].length = length; +} + +/** \ingroup libusb_asyncio + * Convenience function to locate the position of an isochronous packet + * within the buffer of an isochronous transfer. + * + * This is a thorough function which loops through all preceding packets, + * accumulating their lengths to find the position of the specified packet. + * Typically you will assign equal lengths to each packet in the transfer, + * and hence the above method is sub-optimal. You may wish to use + * libusb_get_iso_packet_buffer_simple() instead. + * + * \param transfer a transfer + * \param packet the packet to return the address of + * \returns the base address of the packet buffer inside the transfer buffer, + * or NULL if the packet does not exist. + * \see libusb_get_iso_packet_buffer_simple() + */ +static inline unsigned char *libusb_get_iso_packet_buffer( + struct libusb_transfer *transfer, unsigned int packet) +{ + int i; + size_t offset = 0; + int _packet; + + /* oops..slight bug in the API. packet is an unsigned int, but we use + * signed integers almost everywhere else. range-check and convert to + * signed to avoid compiler warnings. FIXME for libusb-2. */ + if (packet > INT_MAX) + return NULL; + _packet = (int) packet; + + if (_packet >= transfer->num_iso_packets) + return NULL; + + for (i = 0; i < _packet; i++) + offset += transfer->iso_packet_desc[i].length; + + return transfer->buffer + offset; +} + +/** \ingroup libusb_asyncio + * Convenience function to locate the position of an isochronous packet + * within the buffer of an isochronous transfer, for transfers where each + * packet is of identical size. + * + * This function relies on the assumption that every packet within the transfer + * is of identical size to the first packet. Calculating the location of + * the packet buffer is then just a simple calculation: + * buffer + (packet_size * packet) + * + * Do not use this function on transfers other than those that have identical + * packet lengths for each packet. + * + * \param transfer a transfer + * \param packet the packet to return the address of + * \returns the base address of the packet buffer inside the transfer buffer, + * or NULL if the packet does not exist. + * \see libusb_get_iso_packet_buffer() + */ +static inline unsigned char *libusb_get_iso_packet_buffer_simple( + struct libusb_transfer *transfer, unsigned int packet) +{ + int _packet; + + /* oops..slight bug in the API. packet is an unsigned int, but we use + * signed integers almost everywhere else. range-check and convert to + * signed to avoid compiler warnings. FIXME for libusb-2. */ + if (packet > INT_MAX) + return NULL; + _packet = (int) packet; + + if (_packet >= transfer->num_iso_packets) + return NULL; + + return transfer->buffer + ((int) transfer->iso_packet_desc[0].length * _packet); +} + +/* sync I/O */ + +int LIBUSB_CALL libusb_control_transfer(libusb_device_handle *dev_handle, + uint8_t request_type, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, + unsigned char *data, uint16_t wLength, unsigned int timeout); + +int LIBUSB_CALL libusb_bulk_transfer(libusb_device_handle *dev_handle, + unsigned char endpoint, unsigned char *data, int length, + int *actual_length, unsigned int timeout); + +int LIBUSB_CALL libusb_interrupt_transfer(libusb_device_handle *dev_handle, + unsigned char endpoint, unsigned char *data, int length, + int *actual_length, unsigned int timeout); + +/** \ingroup libusb_desc + * Retrieve a descriptor from the default control pipe. + * This is a convenience function which formulates the appropriate control + * message to retrieve the descriptor. + * + * \param dev_handle a device handle + * \param desc_type the descriptor type, see \ref libusb_descriptor_type + * \param desc_index the index of the descriptor to retrieve + * \param data output buffer for descriptor + * \param length size of data buffer + * \returns number of bytes returned in data, or LIBUSB_ERROR code on failure + */ +static inline int libusb_get_descriptor(libusb_device_handle *dev_handle, + uint8_t desc_type, uint8_t desc_index, unsigned char *data, int length) +{ + return libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_IN, + LIBUSB_REQUEST_GET_DESCRIPTOR, (uint16_t) ((desc_type << 8) | desc_index), + 0, data, (uint16_t) length, 1000); +} + +/** \ingroup libusb_desc + * Retrieve a descriptor from a device. + * This is a convenience function which formulates the appropriate control + * message to retrieve the descriptor. The string returned is Unicode, as + * detailed in the USB specifications. + * + * \param dev_handle a device handle + * \param desc_index the index of the descriptor to retrieve + * \param langid the language ID for the string descriptor + * \param data output buffer for descriptor + * \param length size of data buffer + * \returns number of bytes returned in data, or LIBUSB_ERROR code on failure + * \see libusb_get_string_descriptor_ascii() + */ +static inline int libusb_get_string_descriptor(libusb_device_handle *dev_handle, + uint8_t desc_index, uint16_t langid, unsigned char *data, int length) +{ + return libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_IN, + LIBUSB_REQUEST_GET_DESCRIPTOR, (uint16_t)((LIBUSB_DT_STRING << 8) | desc_index), + langid, data, (uint16_t) length, 1000); +} + +int LIBUSB_CALL libusb_get_string_descriptor_ascii(libusb_device_handle *dev_handle, + uint8_t desc_index, unsigned char *data, int length); + +/* polling and timeouts */ + +int LIBUSB_CALL libusb_try_lock_events(libusb_context *ctx); +void LIBUSB_CALL libusb_lock_events(libusb_context *ctx); +void LIBUSB_CALL libusb_unlock_events(libusb_context *ctx); +int LIBUSB_CALL libusb_event_handling_ok(libusb_context *ctx); +int LIBUSB_CALL libusb_event_handler_active(libusb_context *ctx); +void LIBUSB_CALL libusb_interrupt_event_handler(libusb_context *ctx); +void LIBUSB_CALL libusb_lock_event_waiters(libusb_context *ctx); +void LIBUSB_CALL libusb_unlock_event_waiters(libusb_context *ctx); +int LIBUSB_CALL libusb_wait_for_event(libusb_context *ctx, struct timeval *tv); + +int LIBUSB_CALL libusb_handle_events_timeout(libusb_context *ctx, + struct timeval *tv); +int LIBUSB_CALL libusb_handle_events_timeout_completed(libusb_context *ctx, + struct timeval *tv, int *completed); +int LIBUSB_CALL libusb_handle_events(libusb_context *ctx); +int LIBUSB_CALL libusb_handle_events_completed(libusb_context *ctx, int *completed); +int LIBUSB_CALL libusb_handle_events_locked(libusb_context *ctx, + struct timeval *tv); +int LIBUSB_CALL libusb_pollfds_handle_timeouts(libusb_context *ctx); +int LIBUSB_CALL libusb_get_next_timeout(libusb_context *ctx, + struct timeval *tv); + +/** \ingroup libusb_poll + * File descriptor for polling + */ +struct libusb_pollfd { + /** Numeric file descriptor */ + int fd; + + /** Event flags to poll for from . POLLIN indicates that you + * should monitor this file descriptor for becoming ready to read from, + * and POLLOUT indicates that you should monitor this file descriptor for + * nonblocking write readiness. */ + short events; +}; + +/** \ingroup libusb_poll + * Callback function, invoked when a new file descriptor should be added + * to the set of file descriptors monitored for events. + * \param fd the new file descriptor + * \param events events to monitor for, see \ref libusb_pollfd for a + * description + * \param user_data User data pointer specified in + * libusb_set_pollfd_notifiers() call + * \see libusb_set_pollfd_notifiers() + */ +typedef void (LIBUSB_CALL *libusb_pollfd_added_cb)(int fd, short events, + void *user_data); + +/** \ingroup libusb_poll + * Callback function, invoked when a file descriptor should be removed from + * the set of file descriptors being monitored for events. After returning + * from this callback, do not use that file descriptor again. + * \param fd the file descriptor to stop monitoring + * \param user_data User data pointer specified in + * libusb_set_pollfd_notifiers() call + * \see libusb_set_pollfd_notifiers() + */ +typedef void (LIBUSB_CALL *libusb_pollfd_removed_cb)(int fd, void *user_data); + +const struct libusb_pollfd ** LIBUSB_CALL libusb_get_pollfds( + libusb_context *ctx); +void LIBUSB_CALL libusb_free_pollfds(const struct libusb_pollfd **pollfds); +void LIBUSB_CALL libusb_set_pollfd_notifiers(libusb_context *ctx, + libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb, + void *user_data); + +/** \ingroup libusb_hotplug + * Callback handle. + * + * Callbacks handles are generated by libusb_hotplug_register_callback() + * and can be used to deregister callbacks. Callback handles are unique + * per libusb_context and it is safe to call libusb_hotplug_deregister_callback() + * on an already deregisted callback. + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * For more information, see \ref libusb_hotplug. + */ +typedef int libusb_hotplug_callback_handle; + +/** \ingroup libusb_hotplug + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * Flags for hotplug events */ +typedef enum { + /** Default value when not using any flags. */ + LIBUSB_HOTPLUG_NO_FLAGS = 0, + + /** Arm the callback and fire it for all matching currently attached devices. */ + LIBUSB_HOTPLUG_ENUMERATE = 1<<0, +} libusb_hotplug_flag; + +/** \ingroup libusb_hotplug + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * Hotplug events */ +typedef enum { + /** A device has been plugged in and is ready to use */ + LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED = 0x01, + + /** A device has left and is no longer available. + * It is the user's responsibility to call libusb_close on any handle associated with a disconnected device. + * It is safe to call libusb_get_device_descriptor on a device that has left */ + LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT = 0x02, +} libusb_hotplug_event; + +/** \ingroup libusb_hotplug + * Wildcard matching for hotplug events */ +#define LIBUSB_HOTPLUG_MATCH_ANY -1 + +/** \ingroup libusb_hotplug + * Hotplug callback function type. When requesting hotplug event notifications, + * you pass a pointer to a callback function of this type. + * + * This callback may be called by an internal event thread and as such it is + * recommended the callback do minimal processing before returning. + * + * libusb will call this function later, when a matching event had happened on + * a matching device. See \ref libusb_hotplug for more information. + * + * It is safe to call either libusb_hotplug_register_callback() or + * libusb_hotplug_deregister_callback() from within a callback function. + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * \param ctx context of this notification + * \param device libusb_device this event occurred on + * \param event event that occurred + * \param user_data user data provided when this callback was registered + * \returns bool whether this callback is finished processing events. + * returning 1 will cause this callback to be deregistered + */ +typedef int (LIBUSB_CALL *libusb_hotplug_callback_fn)(libusb_context *ctx, + libusb_device *device, + libusb_hotplug_event event, + void *user_data); + +/** \ingroup libusb_hotplug + * Register a hotplug callback function + * + * Register a callback with the libusb_context. The callback will fire + * when a matching event occurs on a matching device. The callback is + * armed until either it is deregistered with libusb_hotplug_deregister_callback() + * or the supplied callback returns 1 to indicate it is finished processing events. + * + * If the \ref LIBUSB_HOTPLUG_ENUMERATE is passed the callback will be + * called with a \ref LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED for all devices + * already plugged into the machine. Note that libusb modifies its internal + * device list from a separate thread, while calling hotplug callbacks from + * libusb_handle_events(), so it is possible for a device to already be present + * on, or removed from, its internal device list, while the hotplug callbacks + * still need to be dispatched. This means that when using \ref + * LIBUSB_HOTPLUG_ENUMERATE, your callback may be called twice for the arrival + * of the same device, once from libusb_hotplug_register_callback() and once + * from libusb_handle_events(); and/or your callback may be called for the + * removal of a device for which an arrived call was never made. + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * \param[in] ctx context to register this callback with + * \param[in] events bitwise or of events that will trigger this callback. See \ref + * libusb_hotplug_event + * \param[in] flags hotplug callback flags. See \ref libusb_hotplug_flag + * \param[in] vendor_id the vendor id to match or \ref LIBUSB_HOTPLUG_MATCH_ANY + * \param[in] product_id the product id to match or \ref LIBUSB_HOTPLUG_MATCH_ANY + * \param[in] dev_class the device class to match or \ref LIBUSB_HOTPLUG_MATCH_ANY + * \param[in] cb_fn the function to be invoked on a matching event/device + * \param[in] user_data user data to pass to the callback function + * \param[out] callback_handle pointer to store the handle of the allocated callback (can be NULL) + * \returns LIBUSB_SUCCESS on success LIBUSB_ERROR code on failure + */ +int LIBUSB_CALL libusb_hotplug_register_callback(libusb_context *ctx, + libusb_hotplug_event events, + libusb_hotplug_flag flags, + int vendor_id, int product_id, + int dev_class, + libusb_hotplug_callback_fn cb_fn, + void *user_data, + libusb_hotplug_callback_handle *callback_handle); + +/** \ingroup libusb_hotplug + * Deregisters a hotplug callback. + * + * Deregister a callback from a libusb_context. This function is safe to call from within + * a hotplug callback. + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * \param[in] ctx context this callback is registered with + * \param[in] callback_handle the handle of the callback to deregister + */ +void LIBUSB_CALL libusb_hotplug_deregister_callback(libusb_context *ctx, + libusb_hotplug_callback_handle callback_handle); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/libusbi.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/libusbi.h new file mode 100644 index 000000000..752e39887 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/libusbi.h @@ -0,0 +1,1149 @@ +/* + * Internal header for libusb + * Copyright © 2007-2009 Daniel Drake + * Copyright © 2001 Johannes Erdfelt + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LIBUSBI_H +#define LIBUSBI_H + +#include + +#include + +#include +#include +#include +#include +#ifdef HAVE_POLL_H +#include +#endif +#ifdef HAVE_MISSING_H +#include +#endif + +#include "libusb.h" +#include "version.h" + +/* Inside the libusb code, mark all public functions as follows: + * return_type API_EXPORTED function_name(params) { ... } + * But if the function returns a pointer, mark it as follows: + * DEFAULT_VISIBILITY return_type * LIBUSB_CALL function_name(params) { ... } + * In the libusb public header, mark all declarations as: + * return_type LIBUSB_CALL function_name(params); + */ +#define API_EXPORTED LIBUSB_CALL DEFAULT_VISIBILITY + +#ifdef __cplusplus +extern "C" { +#endif + +#define DEVICE_DESC_LENGTH 18 + +#define USB_MAXENDPOINTS 32 +#define USB_MAXINTERFACES 32 +#define USB_MAXCONFIG 8 + +/* Backend specific capabilities */ +#define USBI_CAP_HAS_HID_ACCESS 0x00010000 +#define USBI_CAP_SUPPORTS_DETACH_KERNEL_DRIVER 0x00020000 + +/* Maximum number of bytes in a log line */ +#define USBI_MAX_LOG_LEN 1024 +/* Terminator for log lines */ +#define USBI_LOG_LINE_END "\n" + +/* The following is used to silence warnings for unused variables */ +#define UNUSED(var) do { (void)(var); } while(0) + +#if !defined(ARRAYSIZE) +#define ARRAYSIZE(array) (sizeof(array) / sizeof(array[0])) +#endif + +struct list_head { + struct list_head *prev, *next; +}; + +/* Get an entry from the list + * ptr - the address of this list_head element in "type" + * type - the data type that contains "member" + * member - the list_head element in "type" + */ +#define list_entry(ptr, type, member) \ + ((type *)((uintptr_t)(ptr) - (uintptr_t)offsetof(type, member))) + +#define list_first_entry(ptr, type, member) \ + list_entry((ptr)->next, type, member) + +/* Get each entry from a list + * pos - A structure pointer has a "member" element + * head - list head + * member - the list_head element in "pos" + * type - the type of the first parameter + */ +#define list_for_each_entry(pos, head, member, type) \ + for (pos = list_entry((head)->next, type, member); \ + &pos->member != (head); \ + pos = list_entry(pos->member.next, type, member)) + +#define list_for_each_entry_safe(pos, n, head, member, type) \ + for (pos = list_entry((head)->next, type, member), \ + n = list_entry(pos->member.next, type, member); \ + &pos->member != (head); \ + pos = n, n = list_entry(n->member.next, type, member)) + +#define list_empty(entry) ((entry)->next == (entry)) + +static inline void list_init(struct list_head *entry) +{ + entry->prev = entry->next = entry; +} + +static inline void list_add(struct list_head *entry, struct list_head *head) +{ + entry->next = head->next; + entry->prev = head; + + head->next->prev = entry; + head->next = entry; +} + +static inline void list_add_tail(struct list_head *entry, + struct list_head *head) +{ + entry->next = head; + entry->prev = head->prev; + + head->prev->next = entry; + head->prev = entry; +} + +static inline void list_del(struct list_head *entry) +{ + entry->next->prev = entry->prev; + entry->prev->next = entry->next; + entry->next = entry->prev = NULL; +} + +static inline void *usbi_reallocf(void *ptr, size_t size) +{ + void *ret = realloc(ptr, size); + if (!ret) + free(ptr); + return ret; +} + +#define container_of(ptr, type, member) ({ \ + const typeof( ((type *)0)->member ) *mptr = (ptr); \ + (type *)( (char *)mptr - offsetof(type,member) );}) + +#ifndef MIN +#define MIN(a, b) ((a) < (b) ? (a) : (b)) +#endif +#ifndef MAX +#define MAX(a, b) ((a) > (b) ? (a) : (b)) +#endif + +#define TIMESPEC_IS_SET(ts) ((ts)->tv_sec != 0 || (ts)->tv_nsec != 0) + +#if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE) +#define TIMEVAL_TV_SEC_TYPE long +#else +#define TIMEVAL_TV_SEC_TYPE time_t +#endif + +/* Some platforms don't have this define */ +#ifndef TIMESPEC_TO_TIMEVAL +#define TIMESPEC_TO_TIMEVAL(tv, ts) \ + do { \ + (tv)->tv_sec = (TIMEVAL_TV_SEC_TYPE) (ts)->tv_sec; \ + (tv)->tv_usec = (ts)->tv_nsec / 1000; \ + } while (0) +#endif + +void usbi_log(struct libusb_context *ctx, enum libusb_log_level level, + const char *function, const char *format, ...); + +void usbi_log_v(struct libusb_context *ctx, enum libusb_log_level level, + const char *function, const char *format, va_list args); + +#if !defined(_MSC_VER) || _MSC_VER >= 1400 + +#ifdef ENABLE_LOGGING +#define _usbi_log(ctx, level, ...) usbi_log(ctx, level, __FUNCTION__, __VA_ARGS__) +#define usbi_dbg(...) _usbi_log(NULL, LIBUSB_LOG_LEVEL_DEBUG, __VA_ARGS__) +#else +#define _usbi_log(ctx, level, ...) do { (void)(ctx); } while(0) +#define usbi_dbg(...) do {} while(0) +#endif + +#define usbi_info(ctx, ...) _usbi_log(ctx, LIBUSB_LOG_LEVEL_INFO, __VA_ARGS__) +#define usbi_warn(ctx, ...) _usbi_log(ctx, LIBUSB_LOG_LEVEL_WARNING, __VA_ARGS__) +#define usbi_err(ctx, ...) _usbi_log(ctx, LIBUSB_LOG_LEVEL_ERROR, __VA_ARGS__) + +#else /* !defined(_MSC_VER) || _MSC_VER >= 1400 */ + +#ifdef ENABLE_LOGGING +#define LOG_BODY(ctxt, level) \ +{ \ + va_list args; \ + va_start(args, format); \ + usbi_log_v(ctxt, level, "", format, args); \ + va_end(args); \ +} +#else +#define LOG_BODY(ctxt, level) \ +{ \ + (void)(ctxt); \ +} +#endif + +static inline void usbi_info(struct libusb_context *ctx, const char *format, ...) + LOG_BODY(ctx, LIBUSB_LOG_LEVEL_INFO) +static inline void usbi_warn(struct libusb_context *ctx, const char *format, ...) + LOG_BODY(ctx, LIBUSB_LOG_LEVEL_WARNING) +static inline void usbi_err(struct libusb_context *ctx, const char *format, ...) + LOG_BODY(ctx, LIBUSB_LOG_LEVEL_ERROR) + +static inline void usbi_dbg(const char *format, ...) + LOG_BODY(NULL, LIBUSB_LOG_LEVEL_DEBUG) + +#endif /* !defined(_MSC_VER) || _MSC_VER >= 1400 */ + +#define USBI_GET_CONTEXT(ctx) \ + do { \ + if (!(ctx)) \ + (ctx) = usbi_default_context; \ + } while(0) + +#define DEVICE_CTX(dev) ((dev)->ctx) +#define HANDLE_CTX(handle) (DEVICE_CTX((handle)->dev)) +#define TRANSFER_CTX(transfer) (HANDLE_CTX((transfer)->dev_handle)) +#define ITRANSFER_CTX(transfer) \ + (TRANSFER_CTX(USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer))) + +#define IS_EPIN(ep) (0 != ((ep) & LIBUSB_ENDPOINT_IN)) +#define IS_EPOUT(ep) (!IS_EPIN(ep)) +#define IS_XFERIN(xfer) (0 != ((xfer)->endpoint & LIBUSB_ENDPOINT_IN)) +#define IS_XFEROUT(xfer) (!IS_XFERIN(xfer)) + +/* Internal abstraction for thread synchronization */ +#if defined(THREADS_POSIX) +#include "os/threads_posix.h" +#elif defined(OS_WINDOWS) || defined(OS_WINCE) +#include "os/threads_windows.h" +#endif + +extern struct libusb_context *usbi_default_context; + +/* Forward declaration for use in context (fully defined inside poll abstraction) */ +struct pollfd; + +struct libusb_context { + int debug; + int debug_fixed; + + /* internal event pipe, used for signalling occurrence of an internal event. */ + int event_pipe[2]; + + struct list_head usb_devs; + usbi_mutex_t usb_devs_lock; + + /* A list of open handles. Backends are free to traverse this if required. + */ + struct list_head open_devs; + usbi_mutex_t open_devs_lock; + + /* A list of registered hotplug callbacks */ + struct list_head hotplug_cbs; + usbi_mutex_t hotplug_cbs_lock; + + /* this is a list of in-flight transfer handles, sorted by timeout + * expiration. URBs to timeout the soonest are placed at the beginning of + * the list, URBs that will time out later are placed after, and urbs with + * infinite timeout are always placed at the very end. */ + struct list_head flying_transfers; + /* Note paths taking both this and usbi_transfer->lock must always + * take this lock first */ + usbi_mutex_t flying_transfers_lock; + + /* user callbacks for pollfd changes */ + libusb_pollfd_added_cb fd_added_cb; + libusb_pollfd_removed_cb fd_removed_cb; + void *fd_cb_user_data; + + /* ensures that only one thread is handling events at any one time */ + usbi_mutex_t events_lock; + + /* used to see if there is an active thread doing event handling */ + int event_handler_active; + + /* A thread-local storage key to track which thread is performing event + * handling */ + usbi_tls_key_t event_handling_key; + + /* used to wait for event completion in threads other than the one that is + * event handling */ + usbi_mutex_t event_waiters_lock; + usbi_cond_t event_waiters_cond; + + /* A lock to protect internal context event data. */ + usbi_mutex_t event_data_lock; + + /* A bitmask of flags that are set to indicate specific events that need to + * be handled. Protected by event_data_lock. */ + unsigned int event_flags; + + /* A counter that is set when we want to interrupt and prevent event handling, + * in order to safely close a device. Protected by event_data_lock. */ + unsigned int device_close; + + /* list and count of poll fds and an array of poll fd structures that is + * (re)allocated as necessary prior to polling. Protected by event_data_lock. */ + struct list_head ipollfds; + struct pollfd *pollfds; + POLL_NFDS_TYPE pollfds_cnt; + + /* A list of pending hotplug messages. Protected by event_data_lock. */ + struct list_head hotplug_msgs; + + /* A list of pending completed transfers. Protected by event_data_lock. */ + struct list_head completed_transfers; + +#ifdef USBI_TIMERFD_AVAILABLE + /* used for timeout handling, if supported by OS. + * this timerfd is maintained to trigger on the next pending timeout */ + int timerfd; +#endif + + struct list_head list; +}; + +enum usbi_event_flags { + /* The list of pollfds has been modified */ + USBI_EVENT_POLLFDS_MODIFIED = 1 << 0, + + /* The user has interrupted the event handler */ + USBI_EVENT_USER_INTERRUPT = 1 << 1, +}; + +/* Macros for managing event handling state */ +#define usbi_handling_events(ctx) \ + (usbi_tls_key_get((ctx)->event_handling_key) != NULL) + +#define usbi_start_event_handling(ctx) \ + usbi_tls_key_set((ctx)->event_handling_key, ctx) + +#define usbi_end_event_handling(ctx) \ + usbi_tls_key_set((ctx)->event_handling_key, NULL) + +/* Update the following macro if new event sources are added */ +#define usbi_pending_events(ctx) \ + ((ctx)->event_flags || (ctx)->device_close \ + || !list_empty(&(ctx)->hotplug_msgs) || !list_empty(&(ctx)->completed_transfers)) + +#ifdef USBI_TIMERFD_AVAILABLE +#define usbi_using_timerfd(ctx) ((ctx)->timerfd >= 0) +#else +#define usbi_using_timerfd(ctx) (0) +#endif + +struct libusb_device { + /* lock protects refcnt, everything else is finalized at initialization + * time */ + usbi_mutex_t lock; + int refcnt; + + struct libusb_context *ctx; + + uint8_t bus_number; + uint8_t port_number; + struct libusb_device* parent_dev; + uint8_t device_address; + uint8_t num_configurations; + enum libusb_speed speed; + + struct list_head list; + unsigned long session_data; + + struct libusb_device_descriptor device_descriptor; + int attached; + + unsigned char os_priv +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) + [] /* valid C99 code */ +#else + [0] /* non-standard, but usually working code */ +#endif +#if defined(OS_SUNOS) + __attribute__ ((aligned (8))); +#else + ; +#endif +}; + +struct libusb_device_handle { + /* lock protects claimed_interfaces */ + usbi_mutex_t lock; + unsigned long claimed_interfaces; + + struct list_head list; + struct libusb_device *dev; + int auto_detach_kernel_driver; + unsigned char os_priv +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) + [] /* valid C99 code */ +#else + [0] /* non-standard, but usually working code */ +#endif +#if defined(OS_SUNOS) + __attribute__ ((aligned (8))); +#else + ; +#endif +}; + +enum { + USBI_CLOCK_MONOTONIC, + USBI_CLOCK_REALTIME +}; + +/* in-memory transfer layout: + * + * 1. struct usbi_transfer + * 2. struct libusb_transfer (which includes iso packets) [variable size] + * 3. os private data [variable size] + * + * from a libusb_transfer, you can get the usbi_transfer by rewinding the + * appropriate number of bytes. + * the usbi_transfer includes the number of allocated packets, so you can + * determine the size of the transfer and hence the start and length of the + * OS-private data. + */ + +struct usbi_transfer { + int num_iso_packets; + struct list_head list; + struct list_head completed_list; + struct timeval timeout; + int transferred; + uint32_t stream_id; + uint8_t state_flags; /* Protected by usbi_transfer->lock */ + uint8_t timeout_flags; /* Protected by the flying_stransfers_lock */ + + /* this lock is held during libusb_submit_transfer() and + * libusb_cancel_transfer() (allowing the OS backend to prevent duplicate + * cancellation, submission-during-cancellation, etc). the OS backend + * should also take this lock in the handle_events path, to prevent the user + * cancelling the transfer from another thread while you are processing + * its completion (presumably there would be races within your OS backend + * if this were possible). + * Note paths taking both this and the flying_transfers_lock must + * always take the flying_transfers_lock first */ + usbi_mutex_t lock; +}; + +enum usbi_transfer_state_flags { + /* Transfer successfully submitted by backend */ + USBI_TRANSFER_IN_FLIGHT = 1 << 0, + + /* Cancellation was requested via libusb_cancel_transfer() */ + USBI_TRANSFER_CANCELLING = 1 << 1, + + /* Operation on the transfer failed because the device disappeared */ + USBI_TRANSFER_DEVICE_DISAPPEARED = 1 << 2, +}; + +enum usbi_transfer_timeout_flags { + /* Set by backend submit_transfer() if the OS handles timeout */ + USBI_TRANSFER_OS_HANDLES_TIMEOUT = 1 << 0, + + /* The transfer timeout has been handled */ + USBI_TRANSFER_TIMEOUT_HANDLED = 1 << 1, + + /* The transfer timeout was successfully processed */ + USBI_TRANSFER_TIMED_OUT = 1 << 2, +}; + +#define USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer) \ + ((struct libusb_transfer *)(((unsigned char *)(transfer)) \ + + sizeof(struct usbi_transfer))) +#define LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer) \ + ((struct usbi_transfer *)(((unsigned char *)(transfer)) \ + - sizeof(struct usbi_transfer))) + +static inline void *usbi_transfer_get_os_priv(struct usbi_transfer *transfer) +{ + return ((unsigned char *)transfer) + sizeof(struct usbi_transfer) + + sizeof(struct libusb_transfer) + + (transfer->num_iso_packets + * sizeof(struct libusb_iso_packet_descriptor)); +} + +/* bus structures */ + +/* All standard descriptors have these 2 fields in common */ +struct usb_descriptor_header { + uint8_t bLength; + uint8_t bDescriptorType; +}; + +/* shared data and functions */ + +int usbi_io_init(struct libusb_context *ctx); +void usbi_io_exit(struct libusb_context *ctx); + +struct libusb_device *usbi_alloc_device(struct libusb_context *ctx, + unsigned long session_id); +struct libusb_device *usbi_get_device_by_session_id(struct libusb_context *ctx, + unsigned long session_id); +int usbi_sanitize_device(struct libusb_device *dev); +void usbi_handle_disconnect(struct libusb_device_handle *dev_handle); + +int usbi_handle_transfer_completion(struct usbi_transfer *itransfer, + enum libusb_transfer_status status); +int usbi_handle_transfer_cancellation(struct usbi_transfer *transfer); +void usbi_signal_transfer_completion(struct usbi_transfer *transfer); + +int usbi_parse_descriptor(const unsigned char *source, const char *descriptor, + void *dest, int host_endian); +int usbi_device_cache_descriptor(libusb_device *dev); +int usbi_get_config_index_by_value(struct libusb_device *dev, + uint8_t bConfigurationValue, int *idx); + +void usbi_connect_device (struct libusb_device *dev); +void usbi_disconnect_device (struct libusb_device *dev); + +int usbi_signal_event(struct libusb_context *ctx); +int usbi_clear_event(struct libusb_context *ctx); + +/* Internal abstraction for poll (needs struct usbi_transfer on Windows) */ +#if defined(OS_LINUX) || defined(OS_DARWIN) || defined(OS_OPENBSD) || defined(OS_NETBSD) ||\ + defined(OS_HAIKU) || defined(OS_SUNOS) +#include +#include "os/poll_posix.h" +#elif defined(OS_WINDOWS) || defined(OS_WINCE) +#include "os/poll_windows.h" +#endif + +#if defined(_MSC_VER) && (_MSC_VER < 1900) +#define snprintf usbi_snprintf +#define vsnprintf usbi_vsnprintf +int usbi_snprintf(char *dst, size_t size, const char *format, ...); +int usbi_vsnprintf(char *dst, size_t size, const char *format, va_list ap); +#define LIBUSB_PRINTF_WIN32 +#endif + +struct usbi_pollfd { + /* must come first */ + struct libusb_pollfd pollfd; + + struct list_head list; +}; + +int usbi_add_pollfd(struct libusb_context *ctx, int fd, short events); +void usbi_remove_pollfd(struct libusb_context *ctx, int fd); + +/* device discovery */ + +/* we traverse usbfs without knowing how many devices we are going to find. + * so we create this discovered_devs model which is similar to a linked-list + * which grows when required. it can be freed once discovery has completed, + * eliminating the need for a list node in the libusb_device structure + * itself. */ +struct discovered_devs { + size_t len; + size_t capacity; + struct libusb_device *devices +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) + [] /* valid C99 code */ +#else + [0] /* non-standard, but usually working code */ +#endif + ; +}; + +struct discovered_devs *discovered_devs_append( + struct discovered_devs *discdevs, struct libusb_device *dev); + +/* OS abstraction */ + +/* This is the interface that OS backends need to implement. + * All fields are mandatory, except ones explicitly noted as optional. */ +struct usbi_os_backend { + /* A human-readable name for your backend, e.g. "Linux usbfs" */ + const char *name; + + /* Binary mask for backend specific capabilities */ + uint32_t caps; + + /* Perform initialization of your backend. You might use this function + * to determine specific capabilities of the system, allocate required + * data structures for later, etc. + * + * This function is called when a libusb user initializes the library + * prior to use. + * + * Return 0 on success, or a LIBUSB_ERROR code on failure. + */ + int (*init)(struct libusb_context *ctx); + + /* Deinitialization. Optional. This function should destroy anything + * that was set up by init. + * + * This function is called when the user deinitializes the library. + */ + void (*exit)(void); + + /* Enumerate all the USB devices on the system, returning them in a list + * of discovered devices. + * + * Your implementation should enumerate all devices on the system, + * regardless of whether they have been seen before or not. + * + * When you have found a device, compute a session ID for it. The session + * ID should uniquely represent that particular device for that particular + * connection session since boot (i.e. if you disconnect and reconnect a + * device immediately after, it should be assigned a different session ID). + * If your OS cannot provide a unique session ID as described above, + * presenting a session ID of (bus_number << 8 | device_address) should + * be sufficient. Bus numbers and device addresses wrap and get reused, + * but that is an unlikely case. + * + * After computing a session ID for a device, call + * usbi_get_device_by_session_id(). This function checks if libusb already + * knows about the device, and if so, it provides you with a reference + * to a libusb_device structure for it. + * + * If usbi_get_device_by_session_id() returns NULL, it is time to allocate + * a new device structure for the device. Call usbi_alloc_device() to + * obtain a new libusb_device structure with reference count 1. Populate + * the bus_number and device_address attributes of the new device, and + * perform any other internal backend initialization you need to do. At + * this point, you should be ready to provide device descriptors and so + * on through the get_*_descriptor functions. Finally, call + * usbi_sanitize_device() to perform some final sanity checks on the + * device. Assuming all of the above succeeded, we can now continue. + * If any of the above failed, remember to unreference the device that + * was returned by usbi_alloc_device(). + * + * At this stage we have a populated libusb_device structure (either one + * that was found earlier, or one that we have just allocated and + * populated). This can now be added to the discovered devices list + * using discovered_devs_append(). Note that discovered_devs_append() + * may reallocate the list, returning a new location for it, and also + * note that reallocation can fail. Your backend should handle these + * error conditions appropriately. + * + * This function should not generate any bus I/O and should not block. + * If I/O is required (e.g. reading the active configuration value), it is + * OK to ignore these suggestions :) + * + * This function is executed when the user wishes to retrieve a list + * of USB devices connected to the system. + * + * If the backend has hotplug support, this function is not used! + * + * Return 0 on success, or a LIBUSB_ERROR code on failure. + */ + int (*get_device_list)(struct libusb_context *ctx, + struct discovered_devs **discdevs); + + /* Apps which were written before hotplug support, may listen for + * hotplug events on their own and call libusb_get_device_list on + * device addition. In this case libusb_get_device_list will likely + * return a list without the new device in there, as the hotplug + * event thread will still be busy enumerating the device, which may + * take a while, or may not even have seen the event yet. + * + * To avoid this libusb_get_device_list will call this optional + * function for backends with hotplug support before copying + * ctx->usb_devs to the user. In this function the backend should + * ensure any pending hotplug events are fully processed before + * returning. + * + * Optional, should be implemented by backends with hotplug support. + */ + void (*hotplug_poll)(void); + + /* Open a device for I/O and other USB operations. The device handle + * is preallocated for you, you can retrieve the device in question + * through handle->dev. + * + * Your backend should allocate any internal resources required for I/O + * and other operations so that those operations can happen (hopefully) + * without hiccup. This is also a good place to inform libusb that it + * should monitor certain file descriptors related to this device - + * see the usbi_add_pollfd() function. + * + * This function should not generate any bus I/O and should not block. + * + * This function is called when the user attempts to obtain a device + * handle for a device. + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_ACCESS if the user has insufficient permissions + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since + * discovery + * - another LIBUSB_ERROR code on other failure + * + * Do not worry about freeing the handle on failed open, the upper layers + * do this for you. + */ + int (*open)(struct libusb_device_handle *dev_handle); + + /* Close a device such that the handle cannot be used again. Your backend + * should destroy any resources that were allocated in the open path. + * This may also be a good place to call usbi_remove_pollfd() to inform + * libusb of any file descriptors associated with this device that should + * no longer be monitored. + * + * This function is called when the user closes a device handle. + */ + void (*close)(struct libusb_device_handle *dev_handle); + + /* Retrieve the device descriptor from a device. + * + * The descriptor should be retrieved from memory, NOT via bus I/O to the + * device. This means that you may have to cache it in a private structure + * during get_device_list enumeration. Alternatively, you may be able + * to retrieve it from a kernel interface (some Linux setups can do this) + * still without generating bus I/O. + * + * This function is expected to write DEVICE_DESC_LENGTH (18) bytes into + * buffer, which is guaranteed to be big enough. + * + * This function is called when sanity-checking a device before adding + * it to the list of discovered devices, and also when the user requests + * to read the device descriptor. + * + * This function is expected to return the descriptor in bus-endian format + * (LE). If it returns the multi-byte values in host-endian format, + * set the host_endian output parameter to "1". + * + * Return 0 on success or a LIBUSB_ERROR code on failure. + */ + int (*get_device_descriptor)(struct libusb_device *device, + unsigned char *buffer, int *host_endian); + + /* Get the ACTIVE configuration descriptor for a device. + * + * The descriptor should be retrieved from memory, NOT via bus I/O to the + * device. This means that you may have to cache it in a private structure + * during get_device_list enumeration. You may also have to keep track + * of which configuration is active when the user changes it. + * + * This function is expected to write len bytes of data into buffer, which + * is guaranteed to be big enough. If you can only do a partial write, + * return an error code. + * + * This function is expected to return the descriptor in bus-endian format + * (LE). If it returns the multi-byte values in host-endian format, + * set the host_endian output parameter to "1". + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_NOT_FOUND if the device is in unconfigured state + * - another LIBUSB_ERROR code on other failure + */ + int (*get_active_config_descriptor)(struct libusb_device *device, + unsigned char *buffer, size_t len, int *host_endian); + + /* Get a specific configuration descriptor for a device. + * + * The descriptor should be retrieved from memory, NOT via bus I/O to the + * device. This means that you may have to cache it in a private structure + * during get_device_list enumeration. + * + * The requested descriptor is expressed as a zero-based index (i.e. 0 + * indicates that we are requesting the first descriptor). The index does + * not (necessarily) equal the bConfigurationValue of the configuration + * being requested. + * + * This function is expected to write len bytes of data into buffer, which + * is guaranteed to be big enough. If you can only do a partial write, + * return an error code. + * + * This function is expected to return the descriptor in bus-endian format + * (LE). If it returns the multi-byte values in host-endian format, + * set the host_endian output parameter to "1". + * + * Return the length read on success or a LIBUSB_ERROR code on failure. + */ + int (*get_config_descriptor)(struct libusb_device *device, + uint8_t config_index, unsigned char *buffer, size_t len, + int *host_endian); + + /* Like get_config_descriptor but then by bConfigurationValue instead + * of by index. + * + * Optional, if not present the core will call get_config_descriptor + * for all configs until it finds the desired bConfigurationValue. + * + * Returns a pointer to the raw-descriptor in *buffer, this memory + * is valid as long as device is valid. + * + * Returns the length of the returned raw-descriptor on success, + * or a LIBUSB_ERROR code on failure. + */ + int (*get_config_descriptor_by_value)(struct libusb_device *device, + uint8_t bConfigurationValue, unsigned char **buffer, + int *host_endian); + + /* Get the bConfigurationValue for the active configuration for a device. + * Optional. This should only be implemented if you can retrieve it from + * cache (don't generate I/O). + * + * If you cannot retrieve this from cache, either do not implement this + * function, or return LIBUSB_ERROR_NOT_SUPPORTED. This will cause + * libusb to retrieve the information through a standard control transfer. + * + * This function must be non-blocking. + * Return: + * - 0 on success + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it + * was opened + * - LIBUSB_ERROR_NOT_SUPPORTED if the value cannot be retrieved without + * blocking + * - another LIBUSB_ERROR code on other failure. + */ + int (*get_configuration)(struct libusb_device_handle *dev_handle, int *config); + + /* Set the active configuration for a device. + * + * A configuration value of -1 should put the device in unconfigured state. + * + * This function can block. + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_NOT_FOUND if the configuration does not exist + * - LIBUSB_ERROR_BUSY if interfaces are currently claimed (and hence + * configuration cannot be changed) + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it + * was opened + * - another LIBUSB_ERROR code on other failure. + */ + int (*set_configuration)(struct libusb_device_handle *dev_handle, int config); + + /* Claim an interface. When claimed, the application can then perform + * I/O to an interface's endpoints. + * + * This function should not generate any bus I/O and should not block. + * Interface claiming is a logical operation that simply ensures that + * no other drivers/applications are using the interface, and after + * claiming, no other drivers/applications can use the interface because + * we now "own" it. + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_NOT_FOUND if the interface does not exist + * - LIBUSB_ERROR_BUSY if the interface is in use by another driver/app + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it + * was opened + * - another LIBUSB_ERROR code on other failure + */ + int (*claim_interface)(struct libusb_device_handle *dev_handle, int interface_number); + + /* Release a previously claimed interface. + * + * This function should also generate a SET_INTERFACE control request, + * resetting the alternate setting of that interface to 0. It's OK for + * this function to block as a result. + * + * You will only ever be asked to release an interface which was + * successfully claimed earlier. + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it + * was opened + * - another LIBUSB_ERROR code on other failure + */ + int (*release_interface)(struct libusb_device_handle *dev_handle, int interface_number); + + /* Set the alternate setting for an interface. + * + * You will only ever be asked to set the alternate setting for an + * interface which was successfully claimed earlier. + * + * It's OK for this function to block. + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_NOT_FOUND if the alternate setting does not exist + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it + * was opened + * - another LIBUSB_ERROR code on other failure + */ + int (*set_interface_altsetting)(struct libusb_device_handle *dev_handle, + int interface_number, int altsetting); + + /* Clear a halt/stall condition on an endpoint. + * + * It's OK for this function to block. + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_NOT_FOUND if the endpoint does not exist + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it + * was opened + * - another LIBUSB_ERROR code on other failure + */ + int (*clear_halt)(struct libusb_device_handle *dev_handle, + unsigned char endpoint); + + /* Perform a USB port reset to reinitialize a device. + * + * If possible, the device handle should still be usable after the reset + * completes, assuming that the device descriptors did not change during + * reset and all previous interface state can be restored. + * + * If something changes, or you cannot easily locate/verify the resetted + * device, return LIBUSB_ERROR_NOT_FOUND. This prompts the application + * to close the old handle and re-enumerate the device. + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_NOT_FOUND if re-enumeration is required, or if the device + * has been disconnected since it was opened + * - another LIBUSB_ERROR code on other failure + */ + int (*reset_device)(struct libusb_device_handle *dev_handle); + + /* Alloc num_streams usb3 bulk streams on the passed in endpoints */ + int (*alloc_streams)(struct libusb_device_handle *dev_handle, + uint32_t num_streams, unsigned char *endpoints, int num_endpoints); + + /* Free usb3 bulk streams allocated with alloc_streams */ + int (*free_streams)(struct libusb_device_handle *dev_handle, + unsigned char *endpoints, int num_endpoints); + + /* Allocate persistent DMA memory for the given device, suitable for + * zerocopy. May return NULL on failure. Optional to implement. + */ + unsigned char *(*dev_mem_alloc)(struct libusb_device_handle *handle, + size_t len); + + /* Free memory allocated by dev_mem_alloc. */ + int (*dev_mem_free)(struct libusb_device_handle *handle, + unsigned char *buffer, size_t len); + + /* Determine if a kernel driver is active on an interface. Optional. + * + * The presence of a kernel driver on an interface indicates that any + * calls to claim_interface would fail with the LIBUSB_ERROR_BUSY code. + * + * Return: + * - 0 if no driver is active + * - 1 if a driver is active + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it + * was opened + * - another LIBUSB_ERROR code on other failure + */ + int (*kernel_driver_active)(struct libusb_device_handle *dev_handle, + int interface_number); + + /* Detach a kernel driver from an interface. Optional. + * + * After detaching a kernel driver, the interface should be available + * for claim. + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_NOT_FOUND if no kernel driver was active + * - LIBUSB_ERROR_INVALID_PARAM if the interface does not exist + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it + * was opened + * - another LIBUSB_ERROR code on other failure + */ + int (*detach_kernel_driver)(struct libusb_device_handle *dev_handle, + int interface_number); + + /* Attach a kernel driver to an interface. Optional. + * + * Reattach a kernel driver to the device. + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_NOT_FOUND if no kernel driver was active + * - LIBUSB_ERROR_INVALID_PARAM if the interface does not exist + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it + * was opened + * - LIBUSB_ERROR_BUSY if a program or driver has claimed the interface, + * preventing reattachment + * - another LIBUSB_ERROR code on other failure + */ + int (*attach_kernel_driver)(struct libusb_device_handle *dev_handle, + int interface_number); + + /* Destroy a device. Optional. + * + * This function is called when the last reference to a device is + * destroyed. It should free any resources allocated in the get_device_list + * path. + */ + void (*destroy_device)(struct libusb_device *dev); + + /* Submit a transfer. Your implementation should take the transfer, + * morph it into whatever form your platform requires, and submit it + * asynchronously. + * + * This function must not block. + * + * This function gets called with the flying_transfers_lock locked! + * + * Return: + * - 0 on success + * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * - another LIBUSB_ERROR code on other failure + */ + int (*submit_transfer)(struct usbi_transfer *itransfer); + + /* Cancel a previously submitted transfer. + * + * This function must not block. The transfer cancellation must complete + * later, resulting in a call to usbi_handle_transfer_cancellation() + * from the context of handle_events. + */ + int (*cancel_transfer)(struct usbi_transfer *itransfer); + + /* Clear a transfer as if it has completed or cancelled, but do not + * report any completion/cancellation to the library. You should free + * all private data from the transfer as if you were just about to report + * completion or cancellation. + * + * This function might seem a bit out of place. It is used when libusb + * detects a disconnected device - it calls this function for all pending + * transfers before reporting completion (with the disconnect code) to + * the user. Maybe we can improve upon this internal interface in future. + */ + void (*clear_transfer_priv)(struct usbi_transfer *itransfer); + + /* Handle any pending events on file descriptors. Optional. + * + * Provide this function when file descriptors directly indicate device + * or transfer activity. If your backend does not have such file descriptors, + * implement the handle_transfer_completion function below. + * + * This involves monitoring any active transfers and processing their + * completion or cancellation. + * + * The function is passed an array of pollfd structures (size nfds) + * as a result of the poll() system call. The num_ready parameter + * indicates the number of file descriptors that have reported events + * (i.e. the poll() return value). This should be enough information + * for you to determine which actions need to be taken on the currently + * active transfers. + * + * For any cancelled transfers, call usbi_handle_transfer_cancellation(). + * For completed transfers, call usbi_handle_transfer_completion(). + * For control/bulk/interrupt transfers, populate the "transferred" + * element of the appropriate usbi_transfer structure before calling the + * above functions. For isochronous transfers, populate the status and + * transferred fields of the iso packet descriptors of the transfer. + * + * This function should also be able to detect disconnection of the + * device, reporting that situation with usbi_handle_disconnect(). + * + * When processing an event related to a transfer, you probably want to + * take usbi_transfer.lock to prevent races. See the documentation for + * the usbi_transfer structure. + * + * Return 0 on success, or a LIBUSB_ERROR code on failure. + */ + int (*handle_events)(struct libusb_context *ctx, + struct pollfd *fds, POLL_NFDS_TYPE nfds, int num_ready); + + /* Handle transfer completion. Optional. + * + * Provide this function when there are no file descriptors available + * that directly indicate device or transfer activity. If your backend does + * have such file descriptors, implement the handle_events function above. + * + * Your backend must tell the library when a transfer has completed by + * calling usbi_signal_transfer_completion(). You should store any private + * information about the transfer and its completion status in the transfer's + * private backend data. + * + * During event handling, this function will be called on each transfer for + * which usbi_signal_transfer_completion() was called. + * + * For any cancelled transfers, call usbi_handle_transfer_cancellation(). + * For completed transfers, call usbi_handle_transfer_completion(). + * For control/bulk/interrupt transfers, populate the "transferred" + * element of the appropriate usbi_transfer structure before calling the + * above functions. For isochronous transfers, populate the status and + * transferred fields of the iso packet descriptors of the transfer. + * + * Return 0 on success, or a LIBUSB_ERROR code on failure. + */ + int (*handle_transfer_completion)(struct usbi_transfer *itransfer); + + /* Get time from specified clock. At least two clocks must be implemented + by the backend: USBI_CLOCK_REALTIME, and USBI_CLOCK_MONOTONIC. + + Description of clocks: + USBI_CLOCK_REALTIME : clock returns time since system epoch. + USBI_CLOCK_MONOTONIC: clock returns time since unspecified start + time (usually boot). + */ + int (*clock_gettime)(int clkid, struct timespec *tp); + +#ifdef USBI_TIMERFD_AVAILABLE + /* clock ID of the clock that should be used for timerfd */ + clockid_t (*get_timerfd_clockid)(void); +#endif + + /* Number of bytes to reserve for per-device private backend data. + * This private data area is accessible through the "os_priv" field of + * struct libusb_device. */ + size_t device_priv_size; + + /* Number of bytes to reserve for per-handle private backend data. + * This private data area is accessible through the "os_priv" field of + * struct libusb_device. */ + size_t device_handle_priv_size; + + /* Number of bytes to reserve for per-transfer private backend data. + * This private data area is accessible by calling + * usbi_transfer_get_os_priv() on the appropriate usbi_transfer instance. + */ + size_t transfer_priv_size; +}; + +extern const struct usbi_os_backend * const usbi_backend; + +extern const struct usbi_os_backend linux_usbfs_backend; +extern const struct usbi_os_backend darwin_backend; +extern const struct usbi_os_backend openbsd_backend; +extern const struct usbi_os_backend netbsd_backend; +extern const struct usbi_os_backend windows_backend; +extern const struct usbi_os_backend usbdk_backend; +extern const struct usbi_os_backend wince_backend; +extern const struct usbi_os_backend haiku_usb_raw_backend; +extern const struct usbi_os_backend sunos_backend; + +extern struct list_head active_contexts_list; +extern usbi_mutex_static_t active_contexts_lock; + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/darwin_usb.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/darwin_usb.c new file mode 100644 index 000000000..b0219d1b0 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/darwin_usb.c @@ -0,0 +1,2094 @@ +/* -*- Mode: C; indent-tabs-mode:nil -*- */ +/* + * darwin backend for libusb 1.0 + * Copyright © 2008-2016 Nathan Hjelm + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "config.h" +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 && MAC_OS_X_VERSION_MIN_REQUIRED < 101200 + #include +#endif + +#if MAC_OS_X_VERSION_MIN_REQUIRED >= 101200 +/* Apple deprecated the darwin atomics in 10.12 in favor of C11 atomics */ +#include +#define libusb_darwin_atomic_fetch_add(x, y) atomic_fetch_add(x, y) + +_Atomic int32_t initCount = ATOMIC_VAR_INIT(0); +#else +/* use darwin atomics if the target is older than 10.12 */ +#include + +/* OSAtomicAdd32Barrier returns the new value */ +#define libusb_darwin_atomic_fetch_add(x, y) (OSAtomicAdd32Barrier(y, x) - y) + +static volatile int32_t initCount = 0; +#endif + +#include "darwin_usb.h" + +/* async event thread */ +static pthread_mutex_t libusb_darwin_at_mutex = PTHREAD_MUTEX_INITIALIZER; +static pthread_cond_t libusb_darwin_at_cond = PTHREAD_COND_INITIALIZER; + +static pthread_once_t darwin_init_once = PTHREAD_ONCE_INIT; + +static clock_serv_t clock_realtime; +static clock_serv_t clock_monotonic; + +static CFRunLoopRef libusb_darwin_acfl = NULL; /* event cf loop */ +static CFRunLoopSourceRef libusb_darwin_acfls = NULL; /* shutdown signal for event cf loop */ + +static usbi_mutex_t darwin_cached_devices_lock = PTHREAD_MUTEX_INITIALIZER; +static struct list_head darwin_cached_devices = {&darwin_cached_devices, &darwin_cached_devices}; +static char *darwin_device_class = kIOUSBDeviceClassName; + +#define DARWIN_CACHED_DEVICE(a) ((struct darwin_cached_device *) (((struct darwin_device_priv *)((a)->os_priv))->dev)) + +/* async event thread */ +static pthread_t libusb_darwin_at; + +static int darwin_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, unsigned char *buffer, size_t len, int *host_endian); +static int darwin_claim_interface(struct libusb_device_handle *dev_handle, int iface); +static int darwin_release_interface(struct libusb_device_handle *dev_handle, int iface); +static int darwin_reset_device(struct libusb_device_handle *dev_handle); +static void darwin_async_io_callback (void *refcon, IOReturn result, void *arg0); + +static int darwin_scan_devices(struct libusb_context *ctx); +static int process_new_device (struct libusb_context *ctx, io_service_t service); + +#if defined(ENABLE_LOGGING) +static const char *darwin_error_str (int result) { + static char string_buffer[50]; + switch (result) { + case kIOReturnSuccess: + return "no error"; + case kIOReturnNotOpen: + return "device not opened for exclusive access"; + case kIOReturnNoDevice: + return "no connection to an IOService"; + case kIOUSBNoAsyncPortErr: + return "no async port has been opened for interface"; + case kIOReturnExclusiveAccess: + return "another process has device opened for exclusive access"; + case kIOUSBPipeStalled: + return "pipe is stalled"; + case kIOReturnError: + return "could not establish a connection to the Darwin kernel"; + case kIOUSBTransactionTimeout: + return "transaction timed out"; + case kIOReturnBadArgument: + return "invalid argument"; + case kIOReturnAborted: + return "transaction aborted"; + case kIOReturnNotResponding: + return "device not responding"; + case kIOReturnOverrun: + return "data overrun"; + case kIOReturnCannotWire: + return "physical memory can not be wired down"; + case kIOReturnNoResources: + return "out of resources"; + case kIOUSBHighSpeedSplitError: + return "high speed split error"; + default: + snprintf(string_buffer, sizeof(string_buffer), "unknown error (0x%x)", result); + return string_buffer; + } +} +#endif + +static int darwin_to_libusb (int result) { + switch (result) { + case kIOReturnUnderrun: + case kIOReturnSuccess: + return LIBUSB_SUCCESS; + case kIOReturnNotOpen: + case kIOReturnNoDevice: + return LIBUSB_ERROR_NO_DEVICE; + case kIOReturnExclusiveAccess: + return LIBUSB_ERROR_ACCESS; + case kIOUSBPipeStalled: + return LIBUSB_ERROR_PIPE; + case kIOReturnBadArgument: + return LIBUSB_ERROR_INVALID_PARAM; + case kIOUSBTransactionTimeout: + return LIBUSB_ERROR_TIMEOUT; + case kIOReturnNotResponding: + case kIOReturnAborted: + case kIOReturnError: + case kIOUSBNoAsyncPortErr: + default: + return LIBUSB_ERROR_OTHER; + } +} + +/* this function must be called with the darwin_cached_devices_lock held */ +static void darwin_deref_cached_device(struct darwin_cached_device *cached_dev) { + cached_dev->refcount--; + /* free the device and remove it from the cache */ + if (0 == cached_dev->refcount) { + list_del(&cached_dev->list); + + (*(cached_dev->device))->Release(cached_dev->device); + free (cached_dev); + } +} + +static void darwin_ref_cached_device(struct darwin_cached_device *cached_dev) { + cached_dev->refcount++; +} + +static int ep_to_pipeRef(struct libusb_device_handle *dev_handle, uint8_t ep, uint8_t *pipep, uint8_t *ifcp, struct darwin_interface **interface_out) { + struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv; + + /* current interface */ + struct darwin_interface *cInterface; + + int8_t i, iface; + + usbi_dbg ("converting ep address 0x%02x to pipeRef and interface", ep); + + for (iface = 0 ; iface < USB_MAXINTERFACES ; iface++) { + cInterface = &priv->interfaces[iface]; + + if (dev_handle->claimed_interfaces & (1 << iface)) { + for (i = 0 ; i < cInterface->num_endpoints ; i++) { + if (cInterface->endpoint_addrs[i] == ep) { + *pipep = i + 1; + + if (ifcp) + *ifcp = iface; + + if (interface_out) + *interface_out = cInterface; + + usbi_dbg ("pipe %d on interface %d matches", *pipep, iface); + return 0; + } + } + } + } + + /* No pipe found with the correct endpoint address */ + usbi_warn (HANDLE_CTX(dev_handle), "no pipeRef found with endpoint address 0x%02x.", ep); + + return LIBUSB_ERROR_NOT_FOUND; +} + +static int usb_setup_device_iterator (io_iterator_t *deviceIterator, UInt32 location) { + CFMutableDictionaryRef matchingDict = IOServiceMatching(darwin_device_class); + + if (!matchingDict) + return kIOReturnError; + + if (location) { + CFMutableDictionaryRef propertyMatchDict = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks); + + if (propertyMatchDict) { + /* there are no unsigned CFNumber types so treat the value as signed. the os seems to do this + internally (CFNumberType of locationID is 3) */ + CFTypeRef locationCF = CFNumberCreate (NULL, kCFNumberSInt32Type, &location); + + CFDictionarySetValue (propertyMatchDict, CFSTR(kUSBDevicePropertyLocationID), locationCF); + /* release our reference to the CFNumber (CFDictionarySetValue retains it) */ + CFRelease (locationCF); + + CFDictionarySetValue (matchingDict, CFSTR(kIOPropertyMatchKey), propertyMatchDict); + /* release out reference to the CFMutableDictionaryRef (CFDictionarySetValue retains it) */ + CFRelease (propertyMatchDict); + } + /* else we can still proceed as long as the caller accounts for the possibility of other devices in the iterator */ + } + + return IOServiceGetMatchingServices(kIOMasterPortDefault, matchingDict, deviceIterator); +} + +/* Returns 1 on success, 0 on failure. */ +static int get_ioregistry_value_number (io_service_t service, CFStringRef property, CFNumberType type, void *p) { + CFTypeRef cfNumber = IORegistryEntryCreateCFProperty (service, property, kCFAllocatorDefault, 0); + int ret = 0; + + if (cfNumber) { + if (CFGetTypeID(cfNumber) == CFNumberGetTypeID()) { + ret = CFNumberGetValue(cfNumber, type, p); + } + + CFRelease (cfNumber); + } + + return ret; +} + +static int get_ioregistry_value_data (io_service_t service, CFStringRef property, ssize_t size, void *p) { + CFTypeRef cfData = IORegistryEntryCreateCFProperty (service, property, kCFAllocatorDefault, 0); + int ret = 0; + + if (cfData) { + if (CFGetTypeID (cfData) == CFDataGetTypeID ()) { + CFIndex length = CFDataGetLength (cfData); + if (length < size) { + size = length; + } + + CFDataGetBytes (cfData, CFRangeMake(0, size), p); + ret = 1; + } + + CFRelease (cfData); + } + + return ret; +} + +static usb_device_t **darwin_device_from_service (io_service_t service) +{ + io_cf_plugin_ref_t *plugInInterface = NULL; + usb_device_t **device; + kern_return_t result; + SInt32 score; + + result = IOCreatePlugInInterfaceForService(service, kIOUSBDeviceUserClientTypeID, + kIOCFPlugInInterfaceID, &plugInInterface, + &score); + + if (kIOReturnSuccess != result || !plugInInterface) { + usbi_dbg ("could not set up plugin for service: %s", darwin_error_str (result)); + return NULL; + } + + (void)(*plugInInterface)->QueryInterface(plugInInterface, CFUUIDGetUUIDBytes(DeviceInterfaceID), + (LPVOID)&device); + /* Use release instead of IODestroyPlugInInterface to avoid stopping IOServices associated with this device */ + (*plugInInterface)->Release (plugInInterface); + + return device; +} + +static void darwin_devices_attached (void *ptr, io_iterator_t add_devices) { + struct libusb_context *ctx; + io_service_t service; + + usbi_mutex_lock(&active_contexts_lock); + + while ((service = IOIteratorNext(add_devices))) { + /* add this device to each active context's device list */ + list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) { + process_new_device (ctx, service);; + } + + IOObjectRelease(service); + } + + usbi_mutex_unlock(&active_contexts_lock); +} + +static void darwin_devices_detached (void *ptr, io_iterator_t rem_devices) { + struct libusb_device *dev = NULL; + struct libusb_context *ctx; + struct darwin_cached_device *old_device; + + io_service_t device; + UInt64 session; + int ret; + + usbi_mutex_lock(&active_contexts_lock); + + while ((device = IOIteratorNext (rem_devices)) != 0) { + /* get the location from the i/o registry */ + ret = get_ioregistry_value_number (device, CFSTR("sessionID"), kCFNumberSInt64Type, &session); + IOObjectRelease (device); + if (!ret) + continue; + + /* we need to match darwin_ref_cached_device call made in darwin_get_cached_device function + otherwise no cached device will ever get freed */ + usbi_mutex_lock(&darwin_cached_devices_lock); + list_for_each_entry(old_device, &darwin_cached_devices, list, struct darwin_cached_device) { + if (old_device->session == session) { + darwin_deref_cached_device (old_device); + break; + } + } + usbi_mutex_unlock(&darwin_cached_devices_lock); + + list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) { + usbi_dbg ("notifying context %p of device disconnect", ctx); + + dev = usbi_get_device_by_session_id(ctx, (unsigned long) session); + if (dev) { + /* signal the core that this device has been disconnected. the core will tear down this device + when the reference count reaches 0 */ + usbi_disconnect_device(dev); + libusb_unref_device(dev); + } + } + } + + usbi_mutex_unlock(&active_contexts_lock); +} + +static void darwin_hotplug_poll (void) +{ + /* not sure if 5 seconds will be too long/short but it should work ok */ + mach_timespec_t timeout = {.tv_sec = 5, .tv_nsec = 0}; + + /* since a kernel thread may nodify the IOInterators used for + * hotplug notidication we can't just clear the iterators. + * instead just wait until all IOService providers are quiet */ + (void) IOKitWaitQuiet (kIOMasterPortDefault, &timeout); +} + +static void darwin_clear_iterator (io_iterator_t iter) { + io_service_t device; + + while ((device = IOIteratorNext (iter)) != 0) + IOObjectRelease (device); +} + +static void *darwin_event_thread_main (void *arg0) { + IOReturn kresult; + struct libusb_context *ctx = (struct libusb_context *)arg0; + CFRunLoopRef runloop; + +#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 + /* Set this thread's name, so it can be seen in the debugger + and crash reports. */ + pthread_setname_np ("org.libusb.device-hotplug"); +#endif + +#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 && MAC_OS_X_VERSION_MIN_REQUIRED < 101200 + /* Tell the Objective-C garbage collector about this thread. + This is required because, unlike NSThreads, pthreads are + not automatically registered. Although we don't use + Objective-C, we use CoreFoundation, which does. + Garbage collection support was entirely removed in 10.12, + so don't bother there. */ + objc_registerThreadWithCollector(); +#endif + + /* hotplug (device arrival/removal) sources */ + CFRunLoopSourceContext libusb_shutdown_cfsourcectx; + CFRunLoopSourceRef libusb_notification_cfsource; + io_notification_port_t libusb_notification_port; + io_iterator_t libusb_rem_device_iterator; + io_iterator_t libusb_add_device_iterator; + + usbi_dbg ("creating hotplug event source"); + + runloop = CFRunLoopGetCurrent (); + CFRetain (runloop); + + /* add the shutdown cfsource to the run loop */ + memset(&libusb_shutdown_cfsourcectx, 0, sizeof(libusb_shutdown_cfsourcectx)); + libusb_shutdown_cfsourcectx.info = runloop; + libusb_shutdown_cfsourcectx.perform = (void (*)(void *))CFRunLoopStop; + libusb_darwin_acfls = CFRunLoopSourceCreate(NULL, 0, &libusb_shutdown_cfsourcectx); + CFRunLoopAddSource(runloop, libusb_darwin_acfls, kCFRunLoopDefaultMode); + + /* add the notification port to the run loop */ + libusb_notification_port = IONotificationPortCreate (kIOMasterPortDefault); + libusb_notification_cfsource = IONotificationPortGetRunLoopSource (libusb_notification_port); + CFRunLoopAddSource(runloop, libusb_notification_cfsource, kCFRunLoopDefaultMode); + + /* create notifications for removed devices */ + kresult = IOServiceAddMatchingNotification (libusb_notification_port, kIOTerminatedNotification, + IOServiceMatching(darwin_device_class), + darwin_devices_detached, + ctx, &libusb_rem_device_iterator); + + if (kresult != kIOReturnSuccess) { + usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult)); + + pthread_exit (NULL); + } + + /* create notifications for attached devices */ + kresult = IOServiceAddMatchingNotification(libusb_notification_port, kIOFirstMatchNotification, + IOServiceMatching(darwin_device_class), + darwin_devices_attached, + ctx, &libusb_add_device_iterator); + + if (kresult != kIOReturnSuccess) { + usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult)); + + pthread_exit (NULL); + } + + /* arm notifiers */ + darwin_clear_iterator (libusb_rem_device_iterator); + darwin_clear_iterator (libusb_add_device_iterator); + + usbi_dbg ("darwin event thread ready to receive events"); + + /* signal the main thread that the hotplug runloop has been created. */ + pthread_mutex_lock (&libusb_darwin_at_mutex); + libusb_darwin_acfl = runloop; + pthread_cond_signal (&libusb_darwin_at_cond); + pthread_mutex_unlock (&libusb_darwin_at_mutex); + + /* run the runloop */ + CFRunLoopRun(); + + usbi_dbg ("darwin event thread exiting"); + + /* remove the notification cfsource */ + CFRunLoopRemoveSource(runloop, libusb_notification_cfsource, kCFRunLoopDefaultMode); + + /* remove the shutdown cfsource */ + CFRunLoopRemoveSource(runloop, libusb_darwin_acfls, kCFRunLoopDefaultMode); + + /* delete notification port */ + IONotificationPortDestroy (libusb_notification_port); + + /* delete iterators */ + IOObjectRelease (libusb_rem_device_iterator); + IOObjectRelease (libusb_add_device_iterator); + + CFRelease (libusb_darwin_acfls); + CFRelease (runloop); + + libusb_darwin_acfls = NULL; + libusb_darwin_acfl = NULL; + + pthread_exit (NULL); +} + +/* cleanup function to destroy cached devices */ +static void __attribute__((destructor)) _darwin_finalize(void) { + struct darwin_cached_device *dev, *next; + + usbi_mutex_lock(&darwin_cached_devices_lock); + list_for_each_entry_safe(dev, next, &darwin_cached_devices, list, struct darwin_cached_device) { + darwin_deref_cached_device(dev); + } + usbi_mutex_unlock(&darwin_cached_devices_lock); +} + +static void darwin_check_version (void) { + /* adjust for changes in the USB stack in xnu 15 */ + int sysctl_args[] = {CTL_KERN, KERN_OSRELEASE}; + long version; + char version_string[256] = {'\0',}; + size_t length = 256; + + sysctl(sysctl_args, 2, version_string, &length, NULL, 0); + + errno = 0; + version = strtol (version_string, NULL, 10); + if (0 == errno && version >= 15) { + darwin_device_class = "IOUSBHostDevice"; + } +} + +static int darwin_init(struct libusb_context *ctx) { + host_name_port_t host_self; + int rc; + + rc = pthread_once (&darwin_init_once, darwin_check_version); + if (rc) { + return LIBUSB_ERROR_OTHER; + } + + rc = darwin_scan_devices (ctx); + if (LIBUSB_SUCCESS != rc) { + return rc; + } + + if (libusb_darwin_atomic_fetch_add (&initCount, 1) == 0) { + /* create the clocks that will be used */ + + host_self = mach_host_self(); + host_get_clock_service(host_self, CALENDAR_CLOCK, &clock_realtime); + host_get_clock_service(host_self, SYSTEM_CLOCK, &clock_monotonic); + mach_port_deallocate(mach_task_self(), host_self); + + pthread_create (&libusb_darwin_at, NULL, darwin_event_thread_main, ctx); + + pthread_mutex_lock (&libusb_darwin_at_mutex); + while (!libusb_darwin_acfl) + pthread_cond_wait (&libusb_darwin_at_cond, &libusb_darwin_at_mutex); + pthread_mutex_unlock (&libusb_darwin_at_mutex); + } + + return rc; +} + +static void darwin_exit (void) { + if (libusb_darwin_atomic_fetch_add (&initCount, -1) == 1) { + mach_port_deallocate(mach_task_self(), clock_realtime); + mach_port_deallocate(mach_task_self(), clock_monotonic); + + /* stop the event runloop and wait for the thread to terminate. */ + CFRunLoopSourceSignal(libusb_darwin_acfls); + CFRunLoopWakeUp (libusb_darwin_acfl); + pthread_join (libusb_darwin_at, NULL); + } +} + +static int darwin_get_device_descriptor(struct libusb_device *dev, unsigned char *buffer, int *host_endian) { + struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev); + + /* return cached copy */ + memmove (buffer, &(priv->dev_descriptor), DEVICE_DESC_LENGTH); + + *host_endian = 0; + + return 0; +} + +static int get_configuration_index (struct libusb_device *dev, int config_value) { + struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev); + UInt8 i, numConfig; + IOUSBConfigurationDescriptorPtr desc; + IOReturn kresult; + + /* is there a simpler way to determine the index? */ + kresult = (*(priv->device))->GetNumberOfConfigurations (priv->device, &numConfig); + if (kresult != kIOReturnSuccess) + return darwin_to_libusb (kresult); + + for (i = 0 ; i < numConfig ; i++) { + (*(priv->device))->GetConfigurationDescriptorPtr (priv->device, i, &desc); + + if (desc->bConfigurationValue == config_value) + return i; + } + + /* configuration not found */ + return LIBUSB_ERROR_NOT_FOUND; +} + +static int darwin_get_active_config_descriptor(struct libusb_device *dev, unsigned char *buffer, size_t len, int *host_endian) { + struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev); + int config_index; + + if (0 == priv->active_config) + return LIBUSB_ERROR_NOT_FOUND; + + config_index = get_configuration_index (dev, priv->active_config); + if (config_index < 0) + return config_index; + + return darwin_get_config_descriptor (dev, config_index, buffer, len, host_endian); +} + +static int darwin_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, unsigned char *buffer, size_t len, int *host_endian) { + struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev); + IOUSBConfigurationDescriptorPtr desc; + IOReturn kresult; + int ret; + + if (!priv || !priv->device) + return LIBUSB_ERROR_OTHER; + + kresult = (*priv->device)->GetConfigurationDescriptorPtr (priv->device, config_index, &desc); + if (kresult == kIOReturnSuccess) { + /* copy descriptor */ + if (libusb_le16_to_cpu(desc->wTotalLength) < len) + len = libusb_le16_to_cpu(desc->wTotalLength); + + memmove (buffer, desc, len); + + /* GetConfigurationDescriptorPtr returns the descriptor in USB bus order */ + *host_endian = 0; + } + + ret = darwin_to_libusb (kresult); + if (ret != LIBUSB_SUCCESS) + return ret; + + return (int) len; +} + +/* check whether the os has configured the device */ +static int darwin_check_configuration (struct libusb_context *ctx, struct darwin_cached_device *dev) { + usb_device_t **darwin_device = dev->device; + + IOUSBConfigurationDescriptorPtr configDesc; + IOUSBFindInterfaceRequest request; + kern_return_t kresult; + io_iterator_t interface_iterator; + io_service_t firstInterface; + + if (dev->dev_descriptor.bNumConfigurations < 1) { + usbi_err (ctx, "device has no configurations"); + return LIBUSB_ERROR_OTHER; /* no configurations at this speed so we can't use it */ + } + + /* checking the configuration of a root hub simulation takes ~1 s in 10.11. the device is + not usable anyway */ + if (0x05ac == dev->dev_descriptor.idVendor && 0x8005 == dev->dev_descriptor.idProduct) { + usbi_dbg ("ignoring configuration on root hub simulation"); + dev->active_config = 0; + return 0; + } + + /* find the first configuration */ + kresult = (*darwin_device)->GetConfigurationDescriptorPtr (darwin_device, 0, &configDesc); + dev->first_config = (kIOReturnSuccess == kresult) ? configDesc->bConfigurationValue : 1; + + /* check if the device is already configured. there is probably a better way than iterating over the + to accomplish this (the trick is we need to avoid a call to GetConfigurations since buggy devices + might lock up on the device request) */ + + /* Setup the Interface Request */ + request.bInterfaceClass = kIOUSBFindInterfaceDontCare; + request.bInterfaceSubClass = kIOUSBFindInterfaceDontCare; + request.bInterfaceProtocol = kIOUSBFindInterfaceDontCare; + request.bAlternateSetting = kIOUSBFindInterfaceDontCare; + + kresult = (*(darwin_device))->CreateInterfaceIterator(darwin_device, &request, &interface_iterator); + if (kresult) + return darwin_to_libusb (kresult); + + /* iterate once */ + firstInterface = IOIteratorNext(interface_iterator); + + /* done with the interface iterator */ + IOObjectRelease(interface_iterator); + + if (firstInterface) { + IOObjectRelease (firstInterface); + + /* device is configured */ + if (dev->dev_descriptor.bNumConfigurations == 1) + /* to avoid problems with some devices get the configurations value from the configuration descriptor */ + dev->active_config = dev->first_config; + else + /* devices with more than one configuration should work with GetConfiguration */ + (*darwin_device)->GetConfiguration (darwin_device, &dev->active_config); + } else + /* not configured */ + dev->active_config = 0; + + usbi_dbg ("active config: %u, first config: %u", dev->active_config, dev->first_config); + + return 0; +} + +static int darwin_request_descriptor (usb_device_t **device, UInt8 desc, UInt8 desc_index, void *buffer, size_t buffer_size) { + IOUSBDevRequestTO req; + + memset (buffer, 0, buffer_size); + + /* Set up request for descriptor/ */ + req.bmRequestType = USBmakebmRequestType(kUSBIn, kUSBStandard, kUSBDevice); + req.bRequest = kUSBRqGetDescriptor; + req.wValue = desc << 8; + req.wIndex = desc_index; + req.wLength = buffer_size; + req.pData = buffer; + req.noDataTimeout = 20; + req.completionTimeout = 100; + + return (*device)->DeviceRequestTO (device, &req); +} + +static int darwin_cache_device_descriptor (struct libusb_context *ctx, struct darwin_cached_device *dev) { + usb_device_t **device = dev->device; + int retries = 1, delay = 30000; + int unsuspended = 0, try_unsuspend = 1, try_reconfigure = 1; + int is_open = 0; + int ret = 0, ret2; + UInt8 bDeviceClass; + UInt16 idProduct, idVendor; + + dev->can_enumerate = 0; + + (*device)->GetDeviceClass (device, &bDeviceClass); + (*device)->GetDeviceProduct (device, &idProduct); + (*device)->GetDeviceVendor (device, &idVendor); + + /* According to Apple's documentation the device must be open for DeviceRequest but we may not be able to open some + * devices and Apple's USB Prober doesn't bother to open the device before issuing a descriptor request. Still, + * to follow the spec as closely as possible, try opening the device */ + is_open = ((*device)->USBDeviceOpenSeize(device) == kIOReturnSuccess); + + do { + /**** retrieve device descriptor ****/ + ret = darwin_request_descriptor (device, kUSBDeviceDesc, 0, &dev->dev_descriptor, sizeof(dev->dev_descriptor)); + + if (kIOReturnOverrun == ret && kUSBDeviceDesc == dev->dev_descriptor.bDescriptorType) + /* received an overrun error but we still received a device descriptor */ + ret = kIOReturnSuccess; + + if (kIOUSBVendorIDAppleComputer == idVendor) { + /* NTH: don't bother retrying or unsuspending Apple devices */ + break; + } + + if (kIOReturnSuccess == ret && (0 == dev->dev_descriptor.bNumConfigurations || + 0 == dev->dev_descriptor.bcdUSB)) { + /* work around for incorrectly configured devices */ + if (try_reconfigure && is_open) { + usbi_dbg("descriptor appears to be invalid. resetting configuration before trying again..."); + + /* set the first configuration */ + (*device)->SetConfiguration(device, 1); + + /* don't try to reconfigure again */ + try_reconfigure = 0; + } + + ret = kIOUSBPipeStalled; + } + + if (kIOReturnSuccess != ret && is_open && try_unsuspend) { + /* device may be suspended. unsuspend it and try again */ +#if DeviceVersion >= 320 + UInt32 info = 0; + + /* IOUSBFamily 320+ provides a way to detect device suspension but earlier versions do not */ + (void)(*device)->GetUSBDeviceInformation (device, &info); + + /* note that the device was suspended */ + if (info & (1 << kUSBInformationDeviceIsSuspendedBit) || 0 == info) + try_unsuspend = 1; +#endif + + if (try_unsuspend) { + /* try to unsuspend the device */ + ret2 = (*device)->USBDeviceSuspend (device, 0); + if (kIOReturnSuccess != ret2) { + /* prevent log spew from poorly behaving devices. this indicates the + os actually had trouble communicating with the device */ + usbi_dbg("could not retrieve device descriptor. failed to unsuspend: %s",darwin_error_str(ret2)); + } else + unsuspended = 1; + + try_unsuspend = 0; + } + } + + if (kIOReturnSuccess != ret) { + usbi_dbg("kernel responded with code: 0x%08x. sleeping for %d ms before trying again", ret, delay/1000); + /* sleep for a little while before trying again */ + nanosleep(&(struct timespec){delay / 1000000, (delay * 1000) % 1000000000UL}, NULL); + } + } while (kIOReturnSuccess != ret && retries--); + + if (unsuspended) + /* resuspend the device */ + (void)(*device)->USBDeviceSuspend (device, 1); + + if (is_open) + (void) (*device)->USBDeviceClose (device); + + if (ret != kIOReturnSuccess) { + /* a debug message was already printed out for this error */ + if (LIBUSB_CLASS_HUB == bDeviceClass) + usbi_dbg ("could not retrieve device descriptor %.4x:%.4x: %s (%x). skipping device", + idVendor, idProduct, darwin_error_str (ret), ret); + else + usbi_warn (ctx, "could not retrieve device descriptor %.4x:%.4x: %s (%x). skipping device", + idVendor, idProduct, darwin_error_str (ret), ret); + return darwin_to_libusb (ret); + } + + /* catch buggy hubs (which appear to be virtual). Apple's own USB prober has problems with these devices. */ + if (libusb_le16_to_cpu (dev->dev_descriptor.idProduct) != idProduct) { + /* not a valid device */ + usbi_warn (ctx, "idProduct from iokit (%04x) does not match idProduct in descriptor (%04x). skipping device", + idProduct, libusb_le16_to_cpu (dev->dev_descriptor.idProduct)); + return LIBUSB_ERROR_NO_DEVICE; + } + + usbi_dbg ("cached device descriptor:"); + usbi_dbg (" bDescriptorType: 0x%02x", dev->dev_descriptor.bDescriptorType); + usbi_dbg (" bcdUSB: 0x%04x", dev->dev_descriptor.bcdUSB); + usbi_dbg (" bDeviceClass: 0x%02x", dev->dev_descriptor.bDeviceClass); + usbi_dbg (" bDeviceSubClass: 0x%02x", dev->dev_descriptor.bDeviceSubClass); + usbi_dbg (" bDeviceProtocol: 0x%02x", dev->dev_descriptor.bDeviceProtocol); + usbi_dbg (" bMaxPacketSize0: 0x%02x", dev->dev_descriptor.bMaxPacketSize0); + usbi_dbg (" idVendor: 0x%04x", dev->dev_descriptor.idVendor); + usbi_dbg (" idProduct: 0x%04x", dev->dev_descriptor.idProduct); + usbi_dbg (" bcdDevice: 0x%04x", dev->dev_descriptor.bcdDevice); + usbi_dbg (" iManufacturer: 0x%02x", dev->dev_descriptor.iManufacturer); + usbi_dbg (" iProduct: 0x%02x", dev->dev_descriptor.iProduct); + usbi_dbg (" iSerialNumber: 0x%02x", dev->dev_descriptor.iSerialNumber); + usbi_dbg (" bNumConfigurations: 0x%02x", dev->dev_descriptor.bNumConfigurations); + + dev->can_enumerate = 1; + + return LIBUSB_SUCCESS; +} + +static int get_device_port (io_service_t service, UInt8 *port) { + kern_return_t result; + io_service_t parent; + int ret = 0; + + if (get_ioregistry_value_number (service, CFSTR("PortNum"), kCFNumberSInt8Type, port)) { + return 1; + } + + result = IORegistryEntryGetParentEntry (service, kIOServicePlane, &parent); + if (kIOReturnSuccess == result) { + ret = get_ioregistry_value_data (parent, CFSTR("port"), 1, port); + IOObjectRelease (parent); + } + + return ret; +} + +static int darwin_get_cached_device(struct libusb_context *ctx, io_service_t service, + struct darwin_cached_device **cached_out) { + struct darwin_cached_device *new_device; + UInt64 sessionID = 0, parent_sessionID = 0; + int ret = LIBUSB_SUCCESS; + usb_device_t **device; + io_service_t parent; + kern_return_t result; + UInt8 port = 0; + + /* get some info from the io registry */ + (void) get_ioregistry_value_number (service, CFSTR("sessionID"), kCFNumberSInt64Type, &sessionID); + if (!get_device_port (service, &port)) { + usbi_dbg("could not get connected port number"); + } + + usbi_dbg("finding cached device for sessionID 0x%" PRIx64, sessionID); + + result = IORegistryEntryGetParentEntry (service, kIOUSBPlane, &parent); + + if (kIOReturnSuccess == result) { + (void) get_ioregistry_value_number (parent, CFSTR("sessionID"), kCFNumberSInt64Type, &parent_sessionID); + IOObjectRelease(parent); + } + + usbi_mutex_lock(&darwin_cached_devices_lock); + do { + *cached_out = NULL; + + list_for_each_entry(new_device, &darwin_cached_devices, list, struct darwin_cached_device) { + usbi_dbg("matching sessionID 0x%" PRIx64 " against cached device with sessionID 0x%" PRIx64, sessionID, new_device->session); + if (new_device->session == sessionID) { + usbi_dbg("using cached device for device"); + *cached_out = new_device; + break; + } + } + + if (*cached_out) + break; + + usbi_dbg("caching new device with sessionID 0x%" PRIx64, sessionID); + + device = darwin_device_from_service (service); + if (!device) { + ret = LIBUSB_ERROR_NO_DEVICE; + break; + } + + new_device = calloc (1, sizeof (*new_device)); + if (!new_device) { + ret = LIBUSB_ERROR_NO_MEM; + break; + } + + /* add this device to the cached device list */ + list_add(&new_device->list, &darwin_cached_devices); + + (*device)->GetDeviceAddress (device, (USBDeviceAddress *)&new_device->address); + + /* keep a reference to this device */ + darwin_ref_cached_device(new_device); + + new_device->device = device; + new_device->session = sessionID; + (*device)->GetLocationID (device, &new_device->location); + new_device->port = port; + new_device->parent_session = parent_sessionID; + + /* cache the device descriptor */ + ret = darwin_cache_device_descriptor(ctx, new_device); + if (ret) + break; + + if (new_device->can_enumerate) { + snprintf(new_device->sys_path, 20, "%03i-%04x-%04x-%02x-%02x", new_device->address, + new_device->dev_descriptor.idVendor, new_device->dev_descriptor.idProduct, + new_device->dev_descriptor.bDeviceClass, new_device->dev_descriptor.bDeviceSubClass); + } + } while (0); + + usbi_mutex_unlock(&darwin_cached_devices_lock); + + /* keep track of devices regardless of if we successfully enumerate them to + prevent them from being enumerated multiple times */ + + *cached_out = new_device; + + return ret; +} + +static int process_new_device (struct libusb_context *ctx, io_service_t service) { + struct darwin_device_priv *priv; + struct libusb_device *dev = NULL; + struct darwin_cached_device *cached_device; + UInt8 devSpeed; + int ret = 0; + + do { + ret = darwin_get_cached_device (ctx, service, &cached_device); + + if (ret < 0 || !cached_device->can_enumerate) { + return ret; + } + + /* check current active configuration (and cache the first configuration value-- + which may be used by claim_interface) */ + ret = darwin_check_configuration (ctx, cached_device); + if (ret) + break; + + usbi_dbg ("allocating new device in context %p for with session 0x%" PRIx64, + ctx, cached_device->session); + + dev = usbi_alloc_device(ctx, (unsigned long) cached_device->session); + if (!dev) { + return LIBUSB_ERROR_NO_MEM; + } + + priv = (struct darwin_device_priv *)dev->os_priv; + + priv->dev = cached_device; + darwin_ref_cached_device (priv->dev); + + if (cached_device->parent_session > 0) { + dev->parent_dev = usbi_get_device_by_session_id (ctx, (unsigned long) cached_device->parent_session); + } else { + dev->parent_dev = NULL; + } + dev->port_number = cached_device->port; + dev->bus_number = cached_device->location >> 24; + dev->device_address = cached_device->address; + + (*(priv->dev->device))->GetDeviceSpeed (priv->dev->device, &devSpeed); + + switch (devSpeed) { + case kUSBDeviceSpeedLow: dev->speed = LIBUSB_SPEED_LOW; break; + case kUSBDeviceSpeedFull: dev->speed = LIBUSB_SPEED_FULL; break; + case kUSBDeviceSpeedHigh: dev->speed = LIBUSB_SPEED_HIGH; break; +#if DeviceVersion >= 500 + case kUSBDeviceSpeedSuper: dev->speed = LIBUSB_SPEED_SUPER; break; +#endif + default: + usbi_warn (ctx, "Got unknown device speed %d", devSpeed); + } + + ret = usbi_sanitize_device (dev); + if (ret < 0) + break; + + usbi_dbg ("found device with address %d port = %d parent = %p at %p", dev->device_address, + dev->port_number, (void *) dev->parent_dev, priv->dev->sys_path); + } while (0); + + if (0 == ret) { + usbi_connect_device (dev); + } else { + libusb_unref_device (dev); + } + + return ret; +} + +static int darwin_scan_devices(struct libusb_context *ctx) { + io_iterator_t deviceIterator; + io_service_t service; + kern_return_t kresult; + + kresult = usb_setup_device_iterator (&deviceIterator, 0); + if (kresult != kIOReturnSuccess) + return darwin_to_libusb (kresult); + + while ((service = IOIteratorNext (deviceIterator))) { + (void) process_new_device (ctx, service); + + IOObjectRelease(service); + } + + IOObjectRelease(deviceIterator); + + return 0; +} + +static int darwin_open (struct libusb_device_handle *dev_handle) { + struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv; + struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev); + IOReturn kresult; + + if (0 == dpriv->open_count) { + /* try to open the device */ + kresult = (*(dpriv->device))->USBDeviceOpenSeize (dpriv->device); + if (kresult != kIOReturnSuccess) { + usbi_warn (HANDLE_CTX (dev_handle), "USBDeviceOpen: %s", darwin_error_str(kresult)); + + if (kIOReturnExclusiveAccess != kresult) { + return darwin_to_libusb (kresult); + } + + /* it is possible to perform some actions on a device that is not open so do not return an error */ + priv->is_open = 0; + } else { + priv->is_open = 1; + } + + /* create async event source */ + kresult = (*(dpriv->device))->CreateDeviceAsyncEventSource (dpriv->device, &priv->cfSource); + if (kresult != kIOReturnSuccess) { + usbi_err (HANDLE_CTX (dev_handle), "CreateDeviceAsyncEventSource: %s", darwin_error_str(kresult)); + + if (priv->is_open) { + (*(dpriv->device))->USBDeviceClose (dpriv->device); + } + + priv->is_open = 0; + + return darwin_to_libusb (kresult); + } + + CFRetain (libusb_darwin_acfl); + + /* add the cfSource to the aync run loop */ + CFRunLoopAddSource(libusb_darwin_acfl, priv->cfSource, kCFRunLoopCommonModes); + } + + /* device opened successfully */ + dpriv->open_count++; + + usbi_dbg ("device open for access"); + + return 0; +} + +static void darwin_close (struct libusb_device_handle *dev_handle) { + struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv; + struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev); + IOReturn kresult; + int i; + + if (dpriv->open_count == 0) { + /* something is probably very wrong if this is the case */ + usbi_err (HANDLE_CTX (dev_handle), "Close called on a device that was not open!"); + return; + } + + dpriv->open_count--; + + /* make sure all interfaces are released */ + for (i = 0 ; i < USB_MAXINTERFACES ; i++) + if (dev_handle->claimed_interfaces & (1 << i)) + libusb_release_interface (dev_handle, i); + + if (0 == dpriv->open_count) { + /* delete the device's async event source */ + if (priv->cfSource) { + CFRunLoopRemoveSource (libusb_darwin_acfl, priv->cfSource, kCFRunLoopDefaultMode); + CFRelease (priv->cfSource); + priv->cfSource = NULL; + CFRelease (libusb_darwin_acfl); + } + + if (priv->is_open) { + /* close the device */ + kresult = (*(dpriv->device))->USBDeviceClose(dpriv->device); + if (kresult) { + /* Log the fact that we had a problem closing the file, however failing a + * close isn't really an error, so return success anyway */ + usbi_warn (HANDLE_CTX (dev_handle), "USBDeviceClose: %s", darwin_error_str(kresult)); + } + } + } +} + +static int darwin_get_configuration(struct libusb_device_handle *dev_handle, int *config) { + struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev); + + *config = (int) dpriv->active_config; + + return 0; +} + +static int darwin_set_configuration(struct libusb_device_handle *dev_handle, int config) { + struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev); + IOReturn kresult; + int i; + + /* Setting configuration will invalidate the interface, so we need + to reclaim it. First, dispose of existing interfaces, if any. */ + for (i = 0 ; i < USB_MAXINTERFACES ; i++) + if (dev_handle->claimed_interfaces & (1 << i)) + darwin_release_interface (dev_handle, i); + + kresult = (*(dpriv->device))->SetConfiguration (dpriv->device, config); + if (kresult != kIOReturnSuccess) + return darwin_to_libusb (kresult); + + /* Reclaim any interfaces. */ + for (i = 0 ; i < USB_MAXINTERFACES ; i++) + if (dev_handle->claimed_interfaces & (1 << i)) + darwin_claim_interface (dev_handle, i); + + dpriv->active_config = config; + + return 0; +} + +static int darwin_get_interface (usb_device_t **darwin_device, uint8_t ifc, io_service_t *usbInterfacep) { + IOUSBFindInterfaceRequest request; + kern_return_t kresult; + io_iterator_t interface_iterator; + UInt8 bInterfaceNumber; + int ret; + + *usbInterfacep = IO_OBJECT_NULL; + + /* Setup the Interface Request */ + request.bInterfaceClass = kIOUSBFindInterfaceDontCare; + request.bInterfaceSubClass = kIOUSBFindInterfaceDontCare; + request.bInterfaceProtocol = kIOUSBFindInterfaceDontCare; + request.bAlternateSetting = kIOUSBFindInterfaceDontCare; + + kresult = (*(darwin_device))->CreateInterfaceIterator(darwin_device, &request, &interface_iterator); + if (kresult) + return kresult; + + while ((*usbInterfacep = IOIteratorNext(interface_iterator))) { + /* find the interface number */ + ret = get_ioregistry_value_number (*usbInterfacep, CFSTR("bInterfaceNumber"), kCFNumberSInt8Type, + &bInterfaceNumber); + + if (ret && bInterfaceNumber == ifc) { + break; + } + + (void) IOObjectRelease (*usbInterfacep); + } + + /* done with the interface iterator */ + IOObjectRelease(interface_iterator); + + return 0; +} + +static int get_endpoints (struct libusb_device_handle *dev_handle, int iface) { + struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv; + + /* current interface */ + struct darwin_interface *cInterface = &priv->interfaces[iface]; + + kern_return_t kresult; + + u_int8_t numep, direction, number; + u_int8_t dont_care1, dont_care3; + u_int16_t dont_care2; + int rc; + + usbi_dbg ("building table of endpoints."); + + /* retrieve the total number of endpoints on this interface */ + kresult = (*(cInterface->interface))->GetNumEndpoints(cInterface->interface, &numep); + if (kresult) { + usbi_err (HANDLE_CTX (dev_handle), "can't get number of endpoints for interface: %s", darwin_error_str(kresult)); + return darwin_to_libusb (kresult); + } + + /* iterate through pipe references */ + for (int i = 1 ; i <= numep ; i++) { + kresult = (*(cInterface->interface))->GetPipeProperties(cInterface->interface, i, &direction, &number, &dont_care1, + &dont_care2, &dont_care3); + + if (kresult != kIOReturnSuccess) { + /* probably a buggy device. try to get the endpoint address from the descriptors */ + struct libusb_config_descriptor *config; + const struct libusb_endpoint_descriptor *endpoint_desc; + UInt8 alt_setting; + + kresult = (*(cInterface->interface))->GetAlternateSetting (cInterface->interface, &alt_setting); + if (kresult) { + usbi_err (HANDLE_CTX (dev_handle), "can't get alternate setting for interface"); + return darwin_to_libusb (kresult); + } + + rc = libusb_get_active_config_descriptor (dev_handle->dev, &config); + if (LIBUSB_SUCCESS != rc) { + return rc; + } + + endpoint_desc = config->interface[iface].altsetting[alt_setting].endpoint + i - 1; + + cInterface->endpoint_addrs[i - 1] = endpoint_desc->bEndpointAddress; + } else { + cInterface->endpoint_addrs[i - 1] = (((kUSBIn == direction) << kUSBRqDirnShift) | (number & LIBUSB_ENDPOINT_ADDRESS_MASK)); + } + + usbi_dbg ("interface: %i pipe %i: dir: %i number: %i", iface, i, cInterface->endpoint_addrs[i - 1] >> kUSBRqDirnShift, + cInterface->endpoint_addrs[i - 1] & LIBUSB_ENDPOINT_ADDRESS_MASK); + } + + cInterface->num_endpoints = numep; + + return 0; +} + +static int darwin_claim_interface(struct libusb_device_handle *dev_handle, int iface) { + struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev); + struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv; + io_service_t usbInterface = IO_OBJECT_NULL; + IOReturn kresult; + IOCFPlugInInterface **plugInInterface = NULL; + SInt32 score; + + /* current interface */ + struct darwin_interface *cInterface = &priv->interfaces[iface]; + + kresult = darwin_get_interface (dpriv->device, iface, &usbInterface); + if (kresult != kIOReturnSuccess) + return darwin_to_libusb (kresult); + + /* make sure we have an interface */ + if (!usbInterface && dpriv->first_config != 0) { + usbi_info (HANDLE_CTX (dev_handle), "no interface found; setting configuration: %d", dpriv->first_config); + + /* set the configuration */ + kresult = darwin_set_configuration (dev_handle, dpriv->first_config); + if (kresult != LIBUSB_SUCCESS) { + usbi_err (HANDLE_CTX (dev_handle), "could not set configuration"); + return kresult; + } + + kresult = darwin_get_interface (dpriv->device, iface, &usbInterface); + if (kresult) { + usbi_err (HANDLE_CTX (dev_handle), "darwin_get_interface: %s", darwin_error_str(kresult)); + return darwin_to_libusb (kresult); + } + } + + if (!usbInterface) { + usbi_err (HANDLE_CTX (dev_handle), "interface not found"); + return LIBUSB_ERROR_NOT_FOUND; + } + + /* get an interface to the device's interface */ + kresult = IOCreatePlugInInterfaceForService (usbInterface, kIOUSBInterfaceUserClientTypeID, + kIOCFPlugInInterfaceID, &plugInInterface, &score); + + /* ignore release error */ + (void)IOObjectRelease (usbInterface); + + if (kresult) { + usbi_err (HANDLE_CTX (dev_handle), "IOCreatePlugInInterfaceForService: %s", darwin_error_str(kresult)); + return darwin_to_libusb (kresult); + } + + if (!plugInInterface) { + usbi_err (HANDLE_CTX (dev_handle), "plugin interface not found"); + return LIBUSB_ERROR_NOT_FOUND; + } + + /* Do the actual claim */ + kresult = (*plugInInterface)->QueryInterface(plugInInterface, + CFUUIDGetUUIDBytes(kIOUSBInterfaceInterfaceID), + (LPVOID)&cInterface->interface); + /* We no longer need the intermediate plug-in */ + /* Use release instead of IODestroyPlugInInterface to avoid stopping IOServices associated with this device */ + (*plugInInterface)->Release (plugInInterface); + if (kresult || !cInterface->interface) { + usbi_err (HANDLE_CTX (dev_handle), "QueryInterface: %s", darwin_error_str(kresult)); + return darwin_to_libusb (kresult); + } + + /* claim the interface */ + kresult = (*(cInterface->interface))->USBInterfaceOpen(cInterface->interface); + if (kresult) { + usbi_err (HANDLE_CTX (dev_handle), "USBInterfaceOpen: %s", darwin_error_str(kresult)); + return darwin_to_libusb (kresult); + } + + /* update list of endpoints */ + kresult = get_endpoints (dev_handle, iface); + if (kresult) { + /* this should not happen */ + darwin_release_interface (dev_handle, iface); + usbi_err (HANDLE_CTX (dev_handle), "could not build endpoint table"); + return kresult; + } + + cInterface->cfSource = NULL; + + /* create async event source */ + kresult = (*(cInterface->interface))->CreateInterfaceAsyncEventSource (cInterface->interface, &cInterface->cfSource); + if (kresult != kIOReturnSuccess) { + usbi_err (HANDLE_CTX (dev_handle), "could not create async event source"); + + /* can't continue without an async event source */ + (void)darwin_release_interface (dev_handle, iface); + + return darwin_to_libusb (kresult); + } + + /* add the cfSource to the async thread's run loop */ + CFRunLoopAddSource(libusb_darwin_acfl, cInterface->cfSource, kCFRunLoopDefaultMode); + + usbi_dbg ("interface opened"); + + return 0; +} + +static int darwin_release_interface(struct libusb_device_handle *dev_handle, int iface) { + struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv; + IOReturn kresult; + + /* current interface */ + struct darwin_interface *cInterface = &priv->interfaces[iface]; + + /* Check to see if an interface is open */ + if (!cInterface->interface) + return LIBUSB_SUCCESS; + + /* clean up endpoint data */ + cInterface->num_endpoints = 0; + + /* delete the interface's async event source */ + if (cInterface->cfSource) { + CFRunLoopRemoveSource (libusb_darwin_acfl, cInterface->cfSource, kCFRunLoopDefaultMode); + CFRelease (cInterface->cfSource); + } + + kresult = (*(cInterface->interface))->USBInterfaceClose(cInterface->interface); + if (kresult) + usbi_warn (HANDLE_CTX (dev_handle), "USBInterfaceClose: %s", darwin_error_str(kresult)); + + kresult = (*(cInterface->interface))->Release(cInterface->interface); + if (kresult != kIOReturnSuccess) + usbi_warn (HANDLE_CTX (dev_handle), "Release: %s", darwin_error_str(kresult)); + + cInterface->interface = (usb_interface_t **) IO_OBJECT_NULL; + + return darwin_to_libusb (kresult); +} + +static int darwin_set_interface_altsetting(struct libusb_device_handle *dev_handle, int iface, int altsetting) { + struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv; + IOReturn kresult; + + /* current interface */ + struct darwin_interface *cInterface = &priv->interfaces[iface]; + + if (!cInterface->interface) + return LIBUSB_ERROR_NO_DEVICE; + + kresult = (*(cInterface->interface))->SetAlternateInterface (cInterface->interface, altsetting); + if (kresult != kIOReturnSuccess) + darwin_reset_device (dev_handle); + + /* update list of endpoints */ + kresult = get_endpoints (dev_handle, iface); + if (kresult) { + /* this should not happen */ + darwin_release_interface (dev_handle, iface); + usbi_err (HANDLE_CTX (dev_handle), "could not build endpoint table"); + return kresult; + } + + return darwin_to_libusb (kresult); +} + +static int darwin_clear_halt(struct libusb_device_handle *dev_handle, unsigned char endpoint) { + /* current interface */ + struct darwin_interface *cInterface; + IOReturn kresult; + uint8_t pipeRef; + + /* determine the interface/endpoint to use */ + if (ep_to_pipeRef (dev_handle, endpoint, &pipeRef, NULL, &cInterface) != 0) { + usbi_err (HANDLE_CTX (dev_handle), "endpoint not found on any open interface"); + + return LIBUSB_ERROR_NOT_FOUND; + } + + /* newer versions of darwin support clearing additional bits on the device's endpoint */ + kresult = (*(cInterface->interface))->ClearPipeStallBothEnds(cInterface->interface, pipeRef); + if (kresult) + usbi_warn (HANDLE_CTX (dev_handle), "ClearPipeStall: %s", darwin_error_str (kresult)); + + return darwin_to_libusb (kresult); +} + +static int darwin_reset_device(struct libusb_device_handle *dev_handle) { + struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev); + IOUSBDeviceDescriptor descriptor; + IOUSBConfigurationDescriptorPtr cached_configuration; + IOUSBConfigurationDescriptor configuration; + bool reenumerate = false; + IOReturn kresult; + int i; + + kresult = (*(dpriv->device))->ResetDevice (dpriv->device); + if (kresult) { + usbi_err (HANDLE_CTX (dev_handle), "ResetDevice: %s", darwin_error_str (kresult)); + return darwin_to_libusb (kresult); + } + + do { + usbi_dbg ("darwin/reset_device: checking if device descriptor changed"); + + /* ignore return code. if we can't get a descriptor it might be worthwhile re-enumerating anway */ + (void) darwin_request_descriptor (dpriv->device, kUSBDeviceDesc, 0, &descriptor, sizeof (descriptor)); + + /* check if the device descriptor has changed */ + if (0 != memcmp (&dpriv->dev_descriptor, &descriptor, sizeof (descriptor))) { + reenumerate = true; + break; + } + + /* check if any configuration descriptor has changed */ + for (i = 0 ; i < descriptor.bNumConfigurations ; ++i) { + usbi_dbg ("darwin/reset_device: checking if configuration descriptor %d changed", i); + + (void) darwin_request_descriptor (dpriv->device, kUSBConfDesc, i, &configuration, sizeof (configuration)); + (*(dpriv->device))->GetConfigurationDescriptorPtr (dpriv->device, i, &cached_configuration); + + if (!cached_configuration || 0 != memcmp (cached_configuration, &configuration, sizeof (configuration))) { + reenumerate = true; + break; + } + } + } while (0); + + if (reenumerate) { + usbi_dbg ("darwin/reset_device: device requires reenumeration"); + (void) (*(dpriv->device))->USBDeviceReEnumerate (dpriv->device, 0); + return LIBUSB_ERROR_NOT_FOUND; + } + + usbi_dbg ("darwin/reset_device: device reset complete"); + + return LIBUSB_SUCCESS; +} + +static int darwin_kernel_driver_active(struct libusb_device_handle *dev_handle, int interface) { + struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev); + io_service_t usbInterface; + CFTypeRef driver; + IOReturn kresult; + + kresult = darwin_get_interface (dpriv->device, interface, &usbInterface); + if (kresult) { + usbi_err (HANDLE_CTX (dev_handle), "darwin_get_interface: %s", darwin_error_str(kresult)); + + return darwin_to_libusb (kresult); + } + + driver = IORegistryEntryCreateCFProperty (usbInterface, kIOBundleIdentifierKey, kCFAllocatorDefault, 0); + IOObjectRelease (usbInterface); + + if (driver) { + CFRelease (driver); + + return 1; + } + + /* no driver */ + return 0; +} + +/* attaching/detaching kernel drivers is not currently supported (maybe in the future?) */ +static int darwin_attach_kernel_driver (struct libusb_device_handle *dev_handle, int interface) { + UNUSED(dev_handle); + UNUSED(interface); + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +static int darwin_detach_kernel_driver (struct libusb_device_handle *dev_handle, int interface) { + UNUSED(dev_handle); + UNUSED(interface); + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +static void darwin_destroy_device(struct libusb_device *dev) { + struct darwin_device_priv *dpriv = (struct darwin_device_priv *) dev->os_priv; + + if (dpriv->dev) { + /* need to hold the lock in case this is the last reference to the device */ + usbi_mutex_lock(&darwin_cached_devices_lock); + darwin_deref_cached_device (dpriv->dev); + dpriv->dev = NULL; + usbi_mutex_unlock(&darwin_cached_devices_lock); + } +} + +static int submit_bulk_transfer(struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + IOReturn ret; + uint8_t transferType; + /* None of the values below are used in libusbx for bulk transfers */ + uint8_t direction, number, interval, pipeRef; + uint16_t maxPacketSize; + + struct darwin_interface *cInterface; + + if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) { + usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface"); + + return LIBUSB_ERROR_NOT_FOUND; + } + + ret = (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number, + &transferType, &maxPacketSize, &interval); + + if (ret) { + usbi_err (TRANSFER_CTX (transfer), "bulk transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out", + darwin_error_str(ret), ret); + return darwin_to_libusb (ret); + } + + if (0 != (transfer->length % maxPacketSize)) { + /* do not need a zero packet */ + transfer->flags &= ~LIBUSB_TRANSFER_ADD_ZERO_PACKET; + } + + /* submit the request */ + /* timeouts are unavailable on interrupt endpoints */ + if (transferType == kUSBInterrupt) { + if (IS_XFERIN(transfer)) + ret = (*(cInterface->interface))->ReadPipeAsync(cInterface->interface, pipeRef, transfer->buffer, + transfer->length, darwin_async_io_callback, itransfer); + else + ret = (*(cInterface->interface))->WritePipeAsync(cInterface->interface, pipeRef, transfer->buffer, + transfer->length, darwin_async_io_callback, itransfer); + } else { + itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT; + + if (IS_XFERIN(transfer)) + ret = (*(cInterface->interface))->ReadPipeAsyncTO(cInterface->interface, pipeRef, transfer->buffer, + transfer->length, transfer->timeout, transfer->timeout, + darwin_async_io_callback, (void *)itransfer); + else + ret = (*(cInterface->interface))->WritePipeAsyncTO(cInterface->interface, pipeRef, transfer->buffer, + transfer->length, transfer->timeout, transfer->timeout, + darwin_async_io_callback, (void *)itransfer); + } + + if (ret) + usbi_err (TRANSFER_CTX (transfer), "bulk transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out", + darwin_error_str(ret), ret); + + return darwin_to_libusb (ret); +} + +#if InterfaceVersion >= 550 +static int submit_stream_transfer(struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct darwin_interface *cInterface; + uint8_t pipeRef; + IOReturn ret; + + if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) { + usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface"); + + return LIBUSB_ERROR_NOT_FOUND; + } + + itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT; + + if (IS_XFERIN(transfer)) + ret = (*(cInterface->interface))->ReadStreamsPipeAsyncTO(cInterface->interface, pipeRef, itransfer->stream_id, + transfer->buffer, transfer->length, transfer->timeout, + transfer->timeout, darwin_async_io_callback, (void *)itransfer); + else + ret = (*(cInterface->interface))->WriteStreamsPipeAsyncTO(cInterface->interface, pipeRef, itransfer->stream_id, + transfer->buffer, transfer->length, transfer->timeout, + transfer->timeout, darwin_async_io_callback, (void *)itransfer); + + if (ret) + usbi_err (TRANSFER_CTX (transfer), "bulk stream transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out", + darwin_error_str(ret), ret); + + return darwin_to_libusb (ret); +} +#endif + +static int submit_iso_transfer(struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct darwin_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + + IOReturn kresult; + uint8_t direction, number, interval, pipeRef, transferType; + uint16_t maxPacketSize; + UInt64 frame; + AbsoluteTime atTime; + int i; + + struct darwin_interface *cInterface; + + /* construct an array of IOUSBIsocFrames, reuse the old one if possible */ + if (tpriv->isoc_framelist && tpriv->num_iso_packets != transfer->num_iso_packets) { + free(tpriv->isoc_framelist); + tpriv->isoc_framelist = NULL; + } + + if (!tpriv->isoc_framelist) { + tpriv->num_iso_packets = transfer->num_iso_packets; + tpriv->isoc_framelist = (IOUSBIsocFrame*) calloc (transfer->num_iso_packets, sizeof(IOUSBIsocFrame)); + if (!tpriv->isoc_framelist) + return LIBUSB_ERROR_NO_MEM; + } + + /* copy the frame list from the libusb descriptor (the structures differ only is member order) */ + for (i = 0 ; i < transfer->num_iso_packets ; i++) + tpriv->isoc_framelist[i].frReqCount = transfer->iso_packet_desc[i].length; + + /* determine the interface/endpoint to use */ + if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) { + usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface"); + + return LIBUSB_ERROR_NOT_FOUND; + } + + /* determine the properties of this endpoint and the speed of the device */ + (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number, + &transferType, &maxPacketSize, &interval); + + /* Last but not least we need the bus frame number */ + kresult = (*(cInterface->interface))->GetBusFrameNumber(cInterface->interface, &frame, &atTime); + if (kresult) { + usbi_err (TRANSFER_CTX (transfer), "failed to get bus frame number: %d", kresult); + free(tpriv->isoc_framelist); + tpriv->isoc_framelist = NULL; + + return darwin_to_libusb (kresult); + } + + (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number, + &transferType, &maxPacketSize, &interval); + + /* schedule for a frame a little in the future */ + frame += 4; + + if (cInterface->frames[transfer->endpoint] && frame < cInterface->frames[transfer->endpoint]) + frame = cInterface->frames[transfer->endpoint]; + + /* submit the request */ + if (IS_XFERIN(transfer)) + kresult = (*(cInterface->interface))->ReadIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame, + transfer->num_iso_packets, tpriv->isoc_framelist, darwin_async_io_callback, + itransfer); + else + kresult = (*(cInterface->interface))->WriteIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame, + transfer->num_iso_packets, tpriv->isoc_framelist, darwin_async_io_callback, + itransfer); + + if (LIBUSB_SPEED_FULL == transfer->dev_handle->dev->speed) + /* Full speed */ + cInterface->frames[transfer->endpoint] = frame + transfer->num_iso_packets * (1 << (interval - 1)); + else + /* High/super speed */ + cInterface->frames[transfer->endpoint] = frame + transfer->num_iso_packets * (1 << (interval - 1)) / 8; + + if (kresult != kIOReturnSuccess) { + usbi_err (TRANSFER_CTX (transfer), "isochronous transfer failed (dir: %s): %s", IS_XFERIN(transfer) ? "In" : "Out", + darwin_error_str(kresult)); + free (tpriv->isoc_framelist); + tpriv->isoc_framelist = NULL; + } + + return darwin_to_libusb (kresult); +} + +static int submit_control_transfer(struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_control_setup *setup = (struct libusb_control_setup *) transfer->buffer; + struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev); + struct darwin_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + + IOReturn kresult; + + memset(&tpriv->req, 0, sizeof(tpriv->req)); + + /* IOUSBDeviceInterface expects the request in cpu endianness */ + tpriv->req.bmRequestType = setup->bmRequestType; + tpriv->req.bRequest = setup->bRequest; + /* these values should be in bus order from libusb_fill_control_setup */ + tpriv->req.wValue = OSSwapLittleToHostInt16 (setup->wValue); + tpriv->req.wIndex = OSSwapLittleToHostInt16 (setup->wIndex); + tpriv->req.wLength = OSSwapLittleToHostInt16 (setup->wLength); + /* data is stored after the libusb control block */ + tpriv->req.pData = transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE; + tpriv->req.completionTimeout = transfer->timeout; + tpriv->req.noDataTimeout = transfer->timeout; + + itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT; + + /* all transfers in libusb-1.0 are async */ + + if (transfer->endpoint) { + struct darwin_interface *cInterface; + uint8_t pipeRef; + + if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) { + usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface"); + + return LIBUSB_ERROR_NOT_FOUND; + } + + kresult = (*(cInterface->interface))->ControlRequestAsyncTO (cInterface->interface, pipeRef, &(tpriv->req), darwin_async_io_callback, itransfer); + } else + /* control request on endpoint 0 */ + kresult = (*(dpriv->device))->DeviceRequestAsyncTO(dpriv->device, &(tpriv->req), darwin_async_io_callback, itransfer); + + if (kresult != kIOReturnSuccess) + usbi_err (TRANSFER_CTX (transfer), "control request failed: %s", darwin_error_str(kresult)); + + return darwin_to_libusb (kresult); +} + +static int darwin_submit_transfer(struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + return submit_control_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + return submit_bulk_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + return submit_iso_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: +#if InterfaceVersion >= 550 + return submit_stream_transfer(itransfer); +#else + usbi_err (TRANSFER_CTX(transfer), "IOUSBFamily version does not support bulk stream transfers"); + return LIBUSB_ERROR_NOT_SUPPORTED; +#endif + default: + usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type); + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +static int cancel_control_transfer(struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev); + IOReturn kresult; + + usbi_warn (ITRANSFER_CTX (itransfer), "aborting all transactions control pipe"); + + if (!dpriv->device) + return LIBUSB_ERROR_NO_DEVICE; + + kresult = (*(dpriv->device))->USBDeviceAbortPipeZero (dpriv->device); + + return darwin_to_libusb (kresult); +} + +static int darwin_abort_transfers (struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev); + struct darwin_interface *cInterface; + uint8_t pipeRef, iface; + IOReturn kresult; + + if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, &iface, &cInterface) != 0) { + usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface"); + + return LIBUSB_ERROR_NOT_FOUND; + } + + if (!dpriv->device) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_warn (ITRANSFER_CTX (itransfer), "aborting all transactions on interface %d pipe %d", iface, pipeRef); + + /* abort transactions */ +#if InterfaceVersion >= 550 + if (LIBUSB_TRANSFER_TYPE_BULK_STREAM == transfer->type) + (*(cInterface->interface))->AbortStreamsPipe (cInterface->interface, pipeRef, itransfer->stream_id); + else +#endif + (*(cInterface->interface))->AbortPipe (cInterface->interface, pipeRef); + + usbi_dbg ("calling clear pipe stall to clear the data toggle bit"); + + /* newer versions of darwin support clearing additional bits on the device's endpoint */ + kresult = (*(cInterface->interface))->ClearPipeStallBothEnds(cInterface->interface, pipeRef); + + return darwin_to_libusb (kresult); +} + +static int darwin_cancel_transfer(struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + return cancel_control_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + return darwin_abort_transfers (itransfer); + default: + usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type); + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +static void darwin_clear_transfer_priv (struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct darwin_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + + if (transfer->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS && tpriv->isoc_framelist) { + free (tpriv->isoc_framelist); + tpriv->isoc_framelist = NULL; + } +} + +static void darwin_async_io_callback (void *refcon, IOReturn result, void *arg0) { + struct usbi_transfer *itransfer = (struct usbi_transfer *)refcon; + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct darwin_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + + usbi_dbg ("an async io operation has completed"); + + /* if requested write a zero packet */ + if (kIOReturnSuccess == result && IS_XFEROUT(transfer) && transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) { + struct darwin_interface *cInterface; + uint8_t pipeRef; + + (void) ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface); + + (*(cInterface->interface))->WritePipe (cInterface->interface, pipeRef, transfer->buffer, 0); + } + + tpriv->result = result; + tpriv->size = (UInt32) (uintptr_t) arg0; + + /* signal the core that this transfer is complete */ + usbi_signal_transfer_completion(itransfer); +} + +static int darwin_transfer_status (struct usbi_transfer *itransfer, kern_return_t result) { + if (itransfer->timeout_flags & USBI_TRANSFER_TIMED_OUT) + result = kIOUSBTransactionTimeout; + + switch (result) { + case kIOReturnUnderrun: + case kIOReturnSuccess: + return LIBUSB_TRANSFER_COMPLETED; + case kIOReturnAborted: + return LIBUSB_TRANSFER_CANCELLED; + case kIOUSBPipeStalled: + usbi_dbg ("transfer error: pipe is stalled"); + return LIBUSB_TRANSFER_STALL; + case kIOReturnOverrun: + usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: data overrun"); + return LIBUSB_TRANSFER_OVERFLOW; + case kIOUSBTransactionTimeout: + usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: timed out"); + itransfer->timeout_flags |= USBI_TRANSFER_TIMED_OUT; + return LIBUSB_TRANSFER_TIMED_OUT; + default: + usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: %s (value = 0x%08x)", darwin_error_str (result), result); + return LIBUSB_TRANSFER_ERROR; + } +} + +static int darwin_handle_transfer_completion (struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct darwin_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + int isIsoc = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS == transfer->type; + int isBulk = LIBUSB_TRANSFER_TYPE_BULK == transfer->type; + int isControl = LIBUSB_TRANSFER_TYPE_CONTROL == transfer->type; + int isInterrupt = LIBUSB_TRANSFER_TYPE_INTERRUPT == transfer->type; + int i; + + if (!isIsoc && !isBulk && !isControl && !isInterrupt) { + usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type); + return LIBUSB_ERROR_INVALID_PARAM; + } + + usbi_dbg ("handling %s completion with kernel status %d", + isControl ? "control" : isBulk ? "bulk" : isIsoc ? "isoc" : "interrupt", tpriv->result); + + if (kIOReturnSuccess == tpriv->result || kIOReturnUnderrun == tpriv->result) { + if (isIsoc && tpriv->isoc_framelist) { + /* copy isochronous results back */ + + for (i = 0; i < transfer->num_iso_packets ; i++) { + struct libusb_iso_packet_descriptor *lib_desc = &transfer->iso_packet_desc[i]; + lib_desc->status = darwin_to_libusb (tpriv->isoc_framelist[i].frStatus); + lib_desc->actual_length = tpriv->isoc_framelist[i].frActCount; + } + } else if (!isIsoc) + itransfer->transferred += tpriv->size; + } + + /* it is ok to handle cancelled transfers without calling usbi_handle_transfer_cancellation (we catch timeout transfers) */ + return usbi_handle_transfer_completion (itransfer, darwin_transfer_status (itransfer, tpriv->result)); +} + +static int darwin_clock_gettime(int clk_id, struct timespec *tp) { + mach_timespec_t sys_time; + clock_serv_t clock_ref; + + switch (clk_id) { + case USBI_CLOCK_REALTIME: + /* CLOCK_REALTIME represents time since the epoch */ + clock_ref = clock_realtime; + break; + case USBI_CLOCK_MONOTONIC: + /* use system boot time as reference for the monotonic clock */ + clock_ref = clock_monotonic; + break; + default: + return LIBUSB_ERROR_INVALID_PARAM; + } + + clock_get_time (clock_ref, &sys_time); + + tp->tv_sec = sys_time.tv_sec; + tp->tv_nsec = sys_time.tv_nsec; + + return 0; +} + +#if InterfaceVersion >= 550 +static int darwin_alloc_streams (struct libusb_device_handle *dev_handle, uint32_t num_streams, unsigned char *endpoints, + int num_endpoints) { + struct darwin_interface *cInterface; + UInt32 supportsStreams; + uint8_t pipeRef; + int rc, i; + + /* find the mimimum number of supported streams on the endpoint list */ + for (i = 0 ; i < num_endpoints ; ++i) { + if (0 != (rc = ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface))) { + return rc; + } + + (*(cInterface->interface))->SupportsStreams (cInterface->interface, pipeRef, &supportsStreams); + if (num_streams > supportsStreams) + num_streams = supportsStreams; + } + + /* it is an error if any endpoint in endpoints does not support streams */ + if (0 == num_streams) + return LIBUSB_ERROR_INVALID_PARAM; + + /* create the streams */ + for (i = 0 ; i < num_endpoints ; ++i) { + (void) ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface); + + rc = (*(cInterface->interface))->CreateStreams (cInterface->interface, pipeRef, num_streams); + if (kIOReturnSuccess != rc) + return darwin_to_libusb(rc); + } + + return num_streams; +} + +static int darwin_free_streams (struct libusb_device_handle *dev_handle, unsigned char *endpoints, int num_endpoints) { + struct darwin_interface *cInterface; + UInt32 supportsStreams; + uint8_t pipeRef; + int rc; + + for (int i = 0 ; i < num_endpoints ; ++i) { + if (0 != (rc = ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface))) + return rc; + + (*(cInterface->interface))->SupportsStreams (cInterface->interface, pipeRef, &supportsStreams); + if (0 == supportsStreams) + return LIBUSB_ERROR_INVALID_PARAM; + + rc = (*(cInterface->interface))->CreateStreams (cInterface->interface, pipeRef, 0); + if (kIOReturnSuccess != rc) + return darwin_to_libusb(rc); + } + + return LIBUSB_SUCCESS; +} +#endif + +const struct usbi_os_backend darwin_backend = { + .name = "Darwin", + .caps = 0, + .init = darwin_init, + .exit = darwin_exit, + .get_device_list = NULL, /* not needed */ + .get_device_descriptor = darwin_get_device_descriptor, + .get_active_config_descriptor = darwin_get_active_config_descriptor, + .get_config_descriptor = darwin_get_config_descriptor, + .hotplug_poll = darwin_hotplug_poll, + + .open = darwin_open, + .close = darwin_close, + .get_configuration = darwin_get_configuration, + .set_configuration = darwin_set_configuration, + .claim_interface = darwin_claim_interface, + .release_interface = darwin_release_interface, + + .set_interface_altsetting = darwin_set_interface_altsetting, + .clear_halt = darwin_clear_halt, + .reset_device = darwin_reset_device, + +#if InterfaceVersion >= 550 + .alloc_streams = darwin_alloc_streams, + .free_streams = darwin_free_streams, +#endif + + .kernel_driver_active = darwin_kernel_driver_active, + .detach_kernel_driver = darwin_detach_kernel_driver, + .attach_kernel_driver = darwin_attach_kernel_driver, + + .destroy_device = darwin_destroy_device, + + .submit_transfer = darwin_submit_transfer, + .cancel_transfer = darwin_cancel_transfer, + .clear_transfer_priv = darwin_clear_transfer_priv, + + .handle_transfer_completion = darwin_handle_transfer_completion, + + .clock_gettime = darwin_clock_gettime, + + .device_priv_size = sizeof(struct darwin_device_priv), + .device_handle_priv_size = sizeof(struct darwin_device_handle_priv), + .transfer_priv_size = sizeof(struct darwin_transfer_priv), +}; diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/darwin_usb.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/darwin_usb.h new file mode 100644 index 000000000..118043421 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/darwin_usb.h @@ -0,0 +1,164 @@ +/* + * darwin backend for libusb 1.0 + * Copyright © 2008-2015 Nathan Hjelm + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#if !defined(LIBUSB_DARWIN_H) +#define LIBUSB_DARWIN_H + +#include "libusbi.h" + +#include +#include +#include +#include + +/* IOUSBInterfaceInferface */ +#if defined (kIOUSBInterfaceInterfaceID700) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_9 + +#define usb_interface_t IOUSBInterfaceInterface700 +#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID700 +#define InterfaceVersion 700 + +#elif defined (kIOUSBInterfaceInterfaceID550) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_9 + +#define usb_interface_t IOUSBInterfaceInterface550 +#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID550 +#define InterfaceVersion 550 + +#elif defined (kIOUSBInterfaceInterfaceID500) + +#define usb_interface_t IOUSBInterfaceInterface500 +#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID500 +#define InterfaceVersion 500 + +#elif defined (kIOUSBInterfaceInterfaceID300) + +#define usb_interface_t IOUSBInterfaceInterface300 +#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID300 +#define InterfaceVersion 300 + +#elif defined (kIOUSBInterfaceInterfaceID245) + +#define usb_interface_t IOUSBInterfaceInterface245 +#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID245 +#define InterfaceVersion 245 + +#elif defined (kIOUSBInterfaceInterfaceID220) + +#define usb_interface_t IOUSBInterfaceInterface220 +#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID220 +#define InterfaceVersion 220 + +#else + +#error "IOUSBFamily is too old. Please upgrade your OS" + +#endif + +/* IOUSBDeviceInterface */ +#if defined (kIOUSBDeviceInterfaceID500) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_9 + +#define usb_device_t IOUSBDeviceInterface500 +#define DeviceInterfaceID kIOUSBDeviceInterfaceID500 +#define DeviceVersion 500 + +#elif defined (kIOUSBDeviceInterfaceID320) + +#define usb_device_t IOUSBDeviceInterface320 +#define DeviceInterfaceID kIOUSBDeviceInterfaceID320 +#define DeviceVersion 320 + +#elif defined (kIOUSBDeviceInterfaceID300) + +#define usb_device_t IOUSBDeviceInterface300 +#define DeviceInterfaceID kIOUSBDeviceInterfaceID300 +#define DeviceVersion 300 + +#elif defined (kIOUSBDeviceInterfaceID245) + +#define usb_device_t IOUSBDeviceInterface245 +#define DeviceInterfaceID kIOUSBDeviceInterfaceID245 +#define DeviceVersion 245 + +#elif defined (kIOUSBDeviceInterfaceID220) +#define usb_device_t IOUSBDeviceInterface197 +#define DeviceInterfaceID kIOUSBDeviceInterfaceID197 +#define DeviceVersion 197 + +#else + +#error "IOUSBFamily is too old. Please upgrade your OS" + +#endif + +#if !defined(IO_OBJECT_NULL) +#define IO_OBJECT_NULL ((io_object_t) 0) +#endif + +typedef IOCFPlugInInterface *io_cf_plugin_ref_t; +typedef IONotificationPortRef io_notification_port_t; + +/* private structures */ +struct darwin_cached_device { + struct list_head list; + IOUSBDeviceDescriptor dev_descriptor; + UInt32 location; + UInt64 parent_session; + UInt64 session; + UInt16 address; + char sys_path[21]; + usb_device_t **device; + int open_count; + UInt8 first_config, active_config, port; + int can_enumerate; + int refcount; +}; + +struct darwin_device_priv { + struct darwin_cached_device *dev; +}; + +struct darwin_device_handle_priv { + int is_open; + CFRunLoopSourceRef cfSource; + + struct darwin_interface { + usb_interface_t **interface; + uint8_t num_endpoints; + CFRunLoopSourceRef cfSource; + uint64_t frames[256]; + uint8_t endpoint_addrs[USB_MAXENDPOINTS]; + } interfaces[USB_MAXINTERFACES]; +}; + +struct darwin_transfer_priv { + /* Isoc */ + IOUSBIsocFrame *isoc_framelist; + int num_iso_packets; + + /* Control */ + IOUSBDevRequestTO req; + + /* Bulk */ + + /* Completion status */ + IOReturn result; + UInt32 size; +}; + +#endif diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_pollfs.cpp b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_pollfs.cpp new file mode 100644 index 000000000..e0c771320 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_pollfs.cpp @@ -0,0 +1,367 @@ +/* + * Copyright 2007-2008, Haiku Inc. All rights reserved. + * Distributed under the terms of the MIT License. + * + * Authors: + * Michael Lotz + */ + +#include "haiku_usb.h" +#include +#include +#include +#include +#include +#include +#include +#include +#include + +class WatchedEntry { +public: + WatchedEntry(BMessenger *, entry_ref *); + ~WatchedEntry(); + bool EntryCreated(entry_ref *ref); + bool EntryRemoved(ino_t node); + bool InitCheck(); + +private: + BMessenger* fMessenger; + node_ref fNode; + bool fIsDirectory; + USBDevice* fDevice; + WatchedEntry* fEntries; + WatchedEntry* fLink; + bool fInitCheck; +}; + + +class RosterLooper : public BLooper { +public: + RosterLooper(USBRoster *); + void Stop(); + virtual void MessageReceived(BMessage *); + bool InitCheck(); + +private: + USBRoster* fRoster; + WatchedEntry* fRoot; + BMessenger* fMessenger; + bool fInitCheck; +}; + + +WatchedEntry::WatchedEntry(BMessenger *messenger, entry_ref *ref) + : fMessenger(messenger), + fIsDirectory(false), + fDevice(NULL), + fEntries(NULL), + fLink(NULL), + fInitCheck(false) +{ + BEntry entry(ref); + entry.GetNodeRef(&fNode); + + BDirectory directory; + if (entry.IsDirectory() && directory.SetTo(ref) >= B_OK) { + fIsDirectory = true; + + while (directory.GetNextEntry(&entry) >= B_OK) { + if (entry.GetRef(ref) < B_OK) + continue; + + WatchedEntry *child = new(std::nothrow) WatchedEntry(fMessenger, ref); + if (child == NULL) + continue; + if (child->InitCheck() == false) { + delete child; + continue; + } + + child->fLink = fEntries; + fEntries = child; + } + + watch_node(&fNode, B_WATCH_DIRECTORY, *fMessenger); + } + else { + if (strncmp(ref->name, "raw", 3) == 0) + return; + + BPath path, parent_path; + entry.GetPath(&path); + fDevice = new(std::nothrow) USBDevice(path.Path()); + if (fDevice != NULL && fDevice->InitCheck() == true) { + // Add this new device to each active context's device list + struct libusb_context *ctx; + unsigned long session_id = (unsigned long)&fDevice; + + usbi_mutex_lock(&active_contexts_lock); + list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) { + struct libusb_device *dev = usbi_get_device_by_session_id(ctx, session_id); + if (dev) { + usbi_dbg("using previously allocated device with location %lu", session_id); + libusb_unref_device(dev); + continue; + } + usbi_dbg("allocating new device with location %lu", session_id); + dev = usbi_alloc_device(ctx, session_id); + if (!dev) { + usbi_dbg("device allocation failed"); + continue; + } + *((USBDevice **)dev->os_priv) = fDevice; + + // Calculate pseudo-device-address + int addr, tmp; + if (strcmp(path.Leaf(), "hub") == 0) + tmp = 100; //Random Number + else + sscanf(path.Leaf(), "%d", &tmp); + addr = tmp + 1; + path.GetParent(&parent_path); + while (strcmp(parent_path.Leaf(), "usb") != 0) { + sscanf(parent_path.Leaf(), "%d", &tmp); + addr += tmp + 1; + parent_path.GetParent(&parent_path); + } + sscanf(path.Path(), "/dev/bus/usb/%d", &dev->bus_number); + dev->device_address = addr - (dev->bus_number + 1); + + if (usbi_sanitize_device(dev) < 0) { + usbi_dbg("device sanitization failed"); + libusb_unref_device(dev); + continue; + } + usbi_connect_device(dev); + } + usbi_mutex_unlock(&active_contexts_lock); + } + else if (fDevice) { + delete fDevice; + fDevice = NULL; + return; + } + } + fInitCheck = true; +} + + +WatchedEntry::~WatchedEntry() +{ + if (fIsDirectory) { + watch_node(&fNode, B_STOP_WATCHING, *fMessenger); + + WatchedEntry *child = fEntries; + while (child) { + WatchedEntry *next = child->fLink; + delete child; + child = next; + } + } + + if (fDevice) { + // Remove this device from each active context's device list + struct libusb_context *ctx; + struct libusb_device *dev; + unsigned long session_id = (unsigned long)&fDevice; + + usbi_mutex_lock(&active_contexts_lock); + list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) { + dev = usbi_get_device_by_session_id(ctx, session_id); + if (dev != NULL) { + usbi_disconnect_device(dev); + libusb_unref_device(dev); + } else { + usbi_dbg("device with location %lu not found", session_id); + } + } + usbi_mutex_static_unlock(&active_contexts_lock); + delete fDevice; + } +} + + +bool +WatchedEntry::EntryCreated(entry_ref *ref) +{ + if (!fIsDirectory) + return false; + + if (ref->directory != fNode.node) { + WatchedEntry *child = fEntries; + while (child) { + if (child->EntryCreated(ref)) + return true; + child = child->fLink; + } + return false; + } + + WatchedEntry *child = new(std::nothrow) WatchedEntry(fMessenger, ref); + if (child == NULL) + return false; + child->fLink = fEntries; + fEntries = child; + return true; +} + + +bool +WatchedEntry::EntryRemoved(ino_t node) +{ + if (!fIsDirectory) + return false; + + WatchedEntry *child = fEntries; + WatchedEntry *lastChild = NULL; + while (child) { + if (child->fNode.node == node) { + if (lastChild) + lastChild->fLink = child->fLink; + else + fEntries = child->fLink; + delete child; + return true; + } + + if (child->EntryRemoved(node)) + return true; + + lastChild = child; + child = child->fLink; + } + return false; +} + + +bool +WatchedEntry::InitCheck() +{ + return fInitCheck; +} + + +RosterLooper::RosterLooper(USBRoster *roster) + : BLooper("LibusbRoster Looper"), + fRoster(roster), + fRoot(NULL), + fMessenger(NULL), + fInitCheck(false) +{ + BEntry entry("/dev/bus/usb"); + if (!entry.Exists()) { + usbi_err(NULL, "usb_raw not published"); + return; + } + + Run(); + fMessenger = new(std::nothrow) BMessenger(this); + if (fMessenger == NULL) { + usbi_err(NULL, "error creating BMessenger object"); + return; + } + + if (Lock()) { + entry_ref ref; + entry.GetRef(&ref); + fRoot = new(std::nothrow) WatchedEntry(fMessenger, &ref); + Unlock(); + if (fRoot == NULL) + return; + if (fRoot->InitCheck() == false) { + delete fRoot; + fRoot = NULL; + return; + } + } + fInitCheck = true; +} + + +void +RosterLooper::Stop() +{ + Lock(); + delete fRoot; + delete fMessenger; + Quit(); +} + + +void +RosterLooper::MessageReceived(BMessage *message) +{ + int32 opcode; + if (message->FindInt32("opcode", &opcode) < B_OK) + return; + + switch (opcode) { + case B_ENTRY_CREATED: + { + dev_t device; + ino_t directory; + const char *name; + if (message->FindInt32("device", &device) < B_OK || + message->FindInt64("directory", &directory) < B_OK || + message->FindString("name", &name) < B_OK) + break; + + entry_ref ref(device, directory, name); + fRoot->EntryCreated(&ref); + break; + } + case B_ENTRY_REMOVED: + { + ino_t node; + if (message->FindInt64("node", &node) < B_OK) + break; + fRoot->EntryRemoved(node); + break; + } + } +} + + +bool +RosterLooper::InitCheck() +{ + return fInitCheck; +} + + +USBRoster::USBRoster() + : fLooper(NULL) +{ +} + + +USBRoster::~USBRoster() +{ + Stop(); +} + + +int +USBRoster::Start() +{ + if (fLooper == NULL) { + fLooper = new(std::nothrow) RosterLooper(this); + if (fLooper == NULL || ((RosterLooper *)fLooper)->InitCheck() == false) { + if (fLooper) + fLooper = NULL; + return LIBUSB_ERROR_OTHER; + } + } + return LIBUSB_SUCCESS; +} + + +void +USBRoster::Stop() +{ + if (fLooper) { + ((RosterLooper *)fLooper)->Stop(); + fLooper = NULL; + } +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb.h new file mode 100644 index 000000000..d51ae9eae --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb.h @@ -0,0 +1,112 @@ +/* + * Haiku Backend for libusb + * Copyright © 2014 Akshay Jaggi + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include "libusbi.h" +#include "haiku_usb_raw.h" + +using namespace std; + +class USBDevice; +class USBDeviceHandle; +class USBTransfer; + +class USBDevice { +public: + USBDevice(const char *); + virtual ~USBDevice(); + const char* Location() const; + uint8 CountConfigurations() const; + const usb_device_descriptor* Descriptor() const; + const usb_configuration_descriptor* ConfigurationDescriptor(uint32) const; + const usb_configuration_descriptor* ActiveConfiguration() const; + uint8 EndpointToIndex(uint8) const; + uint8 EndpointToInterface(uint8) const; + int ClaimInterface(int); + int ReleaseInterface(int); + int CheckInterfacesFree(int); + int SetActiveConfiguration(int); + int ActiveConfigurationIndex() const; + bool InitCheck(); +private: + int Initialise(); + unsigned int fClaimedInterfaces; // Max Interfaces can be 32. Using a bitmask + usb_device_descriptor fDeviceDescriptor; + unsigned char** fConfigurationDescriptors; + int fActiveConfiguration; + char* fPath; + map fConfigToIndex; + map* fEndpointToIndex; + map* fEndpointToInterface; + bool fInitCheck; +}; + +class USBDeviceHandle { +public: + USBDeviceHandle(USBDevice *dev); + virtual ~USBDeviceHandle(); + int ClaimInterface(int); + int ReleaseInterface(int); + int SetConfiguration(int); + int SetAltSetting(int, int); + status_t SubmitTransfer(struct usbi_transfer *); + status_t CancelTransfer(USBTransfer *); + bool InitCheck(); +private: + int fRawFD; + static status_t TransfersThread(void *); + void TransfersWorker(); + USBDevice* fUSBDevice; + unsigned int fClaimedInterfaces; + BList fTransfers; + BLocker fTransfersLock; + sem_id fTransfersSem; + thread_id fTransfersThread; + bool fInitCheck; +}; + +class USBTransfer { +public: + USBTransfer(struct usbi_transfer *, USBDevice *); + virtual ~USBTransfer(); + void Do(int); + struct usbi_transfer* UsbiTransfer(); + void SetCancelled(); + bool IsCancelled(); +private: + struct usbi_transfer* fUsbiTransfer; + struct libusb_transfer* fLibusbTransfer; + USBDevice* fUSBDevice; + BLocker fStatusLock; + bool fCancelled; +}; + +class USBRoster { +public: + USBRoster(); + virtual ~USBRoster(); + int Start(); + void Stop(); +private: + void* fLooper; +}; diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb_backend.cpp b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb_backend.cpp new file mode 100644 index 000000000..d3de8cc08 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb_backend.cpp @@ -0,0 +1,517 @@ +/* + * Haiku Backend for libusb + * Copyright © 2014 Akshay Jaggi + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + + +#include +#include +#include +#include +#include + +#include "haiku_usb.h" + +int _errno_to_libusb(int status) +{ + return status; +} + +USBTransfer::USBTransfer(struct usbi_transfer *itransfer, USBDevice *device) +{ + fUsbiTransfer = itransfer; + fLibusbTransfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + fUSBDevice = device; + fCancelled = false; +} + +USBTransfer::~USBTransfer() +{ +} + +struct usbi_transfer * +USBTransfer::UsbiTransfer() +{ + return fUsbiTransfer; +} + +void +USBTransfer::SetCancelled() +{ + fCancelled = true; +} + +bool +USBTransfer::IsCancelled() +{ + return fCancelled; +} + +void +USBTransfer::Do(int fRawFD) +{ + switch (fLibusbTransfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + { + struct libusb_control_setup *setup = (struct libusb_control_setup *)fLibusbTransfer->buffer; + usb_raw_command command; + command.control.request_type = setup->bmRequestType; + command.control.request = setup->bRequest; + command.control.value = setup->wValue; + command.control.index = setup->wIndex; + command.control.length = setup->wLength; + command.control.data = fLibusbTransfer->buffer + LIBUSB_CONTROL_SETUP_SIZE; + if (fCancelled) + break; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_CONTROL_TRANSFER, &command, sizeof(command)) || + command.control.status != B_USB_RAW_STATUS_SUCCESS) { + fUsbiTransfer->transferred = -1; + usbi_err(TRANSFER_CTX(fLibusbTransfer), "failed control transfer"); + break; + } + fUsbiTransfer->transferred = command.control.length; + } + break; + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + { + usb_raw_command command; + command.transfer.interface = fUSBDevice->EndpointToInterface(fLibusbTransfer->endpoint); + command.transfer.endpoint = fUSBDevice->EndpointToIndex(fLibusbTransfer->endpoint); + command.transfer.data = fLibusbTransfer->buffer; + command.transfer.length = fLibusbTransfer->length; + if (fCancelled) + break; + if (fLibusbTransfer->type == LIBUSB_TRANSFER_TYPE_BULK) { + if (ioctl(fRawFD, B_USB_RAW_COMMAND_BULK_TRANSFER, &command, sizeof(command)) || + command.transfer.status != B_USB_RAW_STATUS_SUCCESS) { + fUsbiTransfer->transferred = -1; + usbi_err(TRANSFER_CTX(fLibusbTransfer), "failed bulk transfer"); + break; + } + } + else { + if (ioctl(fRawFD, B_USB_RAW_COMMAND_INTERRUPT_TRANSFER, &command, sizeof(command)) || + command.transfer.status != B_USB_RAW_STATUS_SUCCESS) { + fUsbiTransfer->transferred = -1; + usbi_err(TRANSFER_CTX(fLibusbTransfer), "failed interrupt transfer"); + break; + } + } + fUsbiTransfer->transferred = command.transfer.length; + } + break; + // IsochronousTransfers not tested + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + { + usb_raw_command command; + command.isochronous.interface = fUSBDevice->EndpointToInterface(fLibusbTransfer->endpoint); + command.isochronous.endpoint = fUSBDevice->EndpointToIndex(fLibusbTransfer->endpoint); + command.isochronous.data = fLibusbTransfer->buffer; + command.isochronous.length = fLibusbTransfer->length; + command.isochronous.packet_count = fLibusbTransfer->num_iso_packets; + int i; + usb_iso_packet_descriptor *packetDescriptors = new usb_iso_packet_descriptor[fLibusbTransfer->num_iso_packets]; + for (i = 0; i < fLibusbTransfer->num_iso_packets; i++) { + if ((int16)(fLibusbTransfer->iso_packet_desc[i]).length != (fLibusbTransfer->iso_packet_desc[i]).length) { + fUsbiTransfer->transferred = -1; + usbi_err(TRANSFER_CTX(fLibusbTransfer), "failed isochronous transfer"); + break; + } + packetDescriptors[i].request_length = (int16)(fLibusbTransfer->iso_packet_desc[i]).length; + } + if (i < fLibusbTransfer->num_iso_packets) + break; // TODO Handle this error + command.isochronous.packet_descriptors = packetDescriptors; + if (fCancelled) + break; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_ISOCHRONOUS_TRANSFER, &command, sizeof(command)) || + command.isochronous.status != B_USB_RAW_STATUS_SUCCESS) { + fUsbiTransfer->transferred = -1; + usbi_err(TRANSFER_CTX(fLibusbTransfer), "failed isochronous transfer"); + break; + } + for (i = 0; i < fLibusbTransfer->num_iso_packets; i++) { + (fLibusbTransfer->iso_packet_desc[i]).actual_length = packetDescriptors[i].actual_length; + switch (packetDescriptors[i].status) { + case B_OK: + (fLibusbTransfer->iso_packet_desc[i]).status = LIBUSB_TRANSFER_COMPLETED; + break; + default: + (fLibusbTransfer->iso_packet_desc[i]).status = LIBUSB_TRANSFER_ERROR; + break; + } + } + delete[] packetDescriptors; + // Do we put the length of transfer here, for isochronous transfers? + fUsbiTransfer->transferred = command.transfer.length; + } + break; + default: + usbi_err(TRANSFER_CTX(fLibusbTransfer), "Unknown type of transfer"); + } +} + +bool +USBDeviceHandle::InitCheck() +{ + return fInitCheck; +} + +status_t +USBDeviceHandle::TransfersThread(void *self) +{ + USBDeviceHandle *handle = (USBDeviceHandle *)self; + handle->TransfersWorker(); + return B_OK; +} + +void +USBDeviceHandle::TransfersWorker() +{ + while (true) { + status_t status = acquire_sem(fTransfersSem); + if (status == B_BAD_SEM_ID) + break; + if (status == B_INTERRUPTED) + continue; + fTransfersLock.Lock(); + USBTransfer *fPendingTransfer = (USBTransfer *) fTransfers.RemoveItem((int32)0); + fTransfersLock.Unlock(); + fPendingTransfer->Do(fRawFD); + usbi_signal_transfer_completion(fPendingTransfer->UsbiTransfer()); + } +} + +status_t +USBDeviceHandle::SubmitTransfer(struct usbi_transfer *itransfer) +{ + USBTransfer *transfer = new USBTransfer(itransfer, fUSBDevice); + *((USBTransfer **)usbi_transfer_get_os_priv(itransfer)) = transfer; + BAutolock locker(fTransfersLock); + fTransfers.AddItem(transfer); + release_sem(fTransfersSem); + return LIBUSB_SUCCESS; +} + +status_t +USBDeviceHandle::CancelTransfer(USBTransfer *transfer) +{ + transfer->SetCancelled(); + fTransfersLock.Lock(); + bool removed = fTransfers.RemoveItem(transfer); + fTransfersLock.Unlock(); + if(removed) + usbi_signal_transfer_completion(transfer->UsbiTransfer()); + return LIBUSB_SUCCESS; +} + +USBDeviceHandle::USBDeviceHandle(USBDevice *dev) + : + fTransfersThread(-1), + fUSBDevice(dev), + fClaimedInterfaces(0), + fInitCheck(false) +{ + fRawFD = open(dev->Location(), O_RDWR | O_CLOEXEC); + if (fRawFD < 0) { + usbi_err(NULL,"failed to open device"); + return; + } + fTransfersSem = create_sem(0, "Transfers Queue Sem"); + fTransfersThread = spawn_thread(TransfersThread, "Transfer Worker", B_NORMAL_PRIORITY, this); + resume_thread(fTransfersThread); + fInitCheck = true; +} + +USBDeviceHandle::~USBDeviceHandle() +{ + if (fRawFD > 0) + close(fRawFD); + for(int i = 0; i < 32; i++) { + if (fClaimedInterfaces & (1 << i)) + ReleaseInterface(i); + } + delete_sem(fTransfersSem); + if (fTransfersThread > 0) + wait_for_thread(fTransfersThread, NULL); +} + +int +USBDeviceHandle::ClaimInterface(int inumber) +{ + int status = fUSBDevice->ClaimInterface(inumber); + if (status == LIBUSB_SUCCESS) + fClaimedInterfaces |= (1 << inumber); + return status; +} + +int +USBDeviceHandle::ReleaseInterface(int inumber) +{ + fUSBDevice->ReleaseInterface(inumber); + fClaimedInterfaces &= ~(1 << inumber); + return LIBUSB_SUCCESS; +} + +int +USBDeviceHandle::SetConfiguration(int config) +{ + int config_index = fUSBDevice->CheckInterfacesFree(config); + if(config_index == LIBUSB_ERROR_BUSY || config_index == LIBUSB_ERROR_NOT_FOUND) + return config_index; + usb_raw_command command; + command.config.config_index = config_index; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_SET_CONFIGURATION, &command, sizeof(command)) || + command.config.status != B_USB_RAW_STATUS_SUCCESS) { + return _errno_to_libusb(command.config.status); + } + fUSBDevice->SetActiveConfiguration(config_index); + return LIBUSB_SUCCESS; +} + +int +USBDeviceHandle::SetAltSetting(int inumber, int alt) +{ + usb_raw_command command; + command.alternate.config_index = fUSBDevice->ActiveConfigurationIndex(); + command.alternate.interface_index = inumber; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_GET_ACTIVE_ALT_INTERFACE_INDEX, &command, sizeof(command)) || + command.alternate.status != B_USB_RAW_STATUS_SUCCESS) { + usbi_err(NULL, "Error retrieving active alternate interface"); + return _errno_to_libusb(command.alternate.status); + } + if (command.alternate.alternate_info == alt) { + usbi_dbg("Setting alternate interface successful"); + return LIBUSB_SUCCESS; + } + command.alternate.alternate_info = alt; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_SET_ALT_INTERFACE, &command, sizeof(command)) || + command.alternate.status != B_USB_RAW_STATUS_SUCCESS) { //IF IOCTL FAILS DEVICE DISONNECTED PROBABLY + usbi_err(NULL, "Error setting alternate interface"); + return _errno_to_libusb(command.alternate.status); + } + usbi_dbg("Setting alternate interface successful"); + return LIBUSB_SUCCESS; +} + + +USBDevice::USBDevice(const char *path) + : + fPath(NULL), + fActiveConfiguration(0), //0? + fConfigurationDescriptors(NULL), + fClaimedInterfaces(0), + fEndpointToIndex(NULL), + fEndpointToInterface(NULL), + fInitCheck(false) +{ + fPath=strdup(path); + Initialise(); +} + +USBDevice::~USBDevice() +{ + free(fPath); + if (fConfigurationDescriptors) { + for(int i = 0; i < fDeviceDescriptor.num_configurations; i++) { + if (fConfigurationDescriptors[i]) + delete fConfigurationDescriptors[i]; + } + delete[] fConfigurationDescriptors; + } + if (fEndpointToIndex) + delete[] fEndpointToIndex; + if (fEndpointToInterface) + delete[] fEndpointToInterface; +} + +bool +USBDevice::InitCheck() +{ + return fInitCheck; +} + +const char * +USBDevice::Location() const +{ + return fPath; +} + +uint8 +USBDevice::CountConfigurations() const +{ + return fDeviceDescriptor.num_configurations; +} + +const usb_device_descriptor * +USBDevice::Descriptor() const +{ + return &fDeviceDescriptor; +} + +const usb_configuration_descriptor * +USBDevice::ConfigurationDescriptor(uint32 index) const +{ + if (index > CountConfigurations()) + return NULL; + return (usb_configuration_descriptor *) fConfigurationDescriptors[index]; +} + +const usb_configuration_descriptor * +USBDevice::ActiveConfiguration() const +{ + return (usb_configuration_descriptor *) fConfigurationDescriptors[fActiveConfiguration]; +} + +int +USBDevice::ActiveConfigurationIndex() const +{ + return fActiveConfiguration; +} + +int USBDevice::ClaimInterface(int interface) +{ + if (interface > ActiveConfiguration()->number_interfaces) + return LIBUSB_ERROR_NOT_FOUND; + if (fClaimedInterfaces & (1 << interface)) + return LIBUSB_ERROR_BUSY; + fClaimedInterfaces |= (1 << interface); + return LIBUSB_SUCCESS; +} + +int USBDevice::ReleaseInterface(int interface) +{ + fClaimedInterfaces &= ~(1 << interface); + return LIBUSB_SUCCESS; +} + +int +USBDevice::CheckInterfacesFree(int config) +{ + if (fConfigToIndex.count(config) == 0) + return LIBUSB_ERROR_NOT_FOUND; + if (fClaimedInterfaces == 0) + return fConfigToIndex[(uint8)config]; + return LIBUSB_ERROR_BUSY; +} + +int +USBDevice::SetActiveConfiguration(int config_index) +{ + fActiveConfiguration = config_index; + return LIBUSB_SUCCESS; +} + +uint8 +USBDevice::EndpointToIndex(uint8 address) const +{ + return fEndpointToIndex[fActiveConfiguration][address]; +} + +uint8 +USBDevice::EndpointToInterface(uint8 address) const +{ + return fEndpointToInterface[fActiveConfiguration][address]; +} + +int +USBDevice::Initialise() //Do we need more error checking, etc? How to report? +{ + int fRawFD = open(fPath, O_RDWR | O_CLOEXEC); + if (fRawFD < 0) + return B_ERROR; + usb_raw_command command; + command.device.descriptor = &fDeviceDescriptor; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_GET_DEVICE_DESCRIPTOR, &command, sizeof(command)) || + command.device.status != B_USB_RAW_STATUS_SUCCESS) { + close(fRawFD); + return B_ERROR; + } + + fConfigurationDescriptors = new(std::nothrow) unsigned char *[fDeviceDescriptor.num_configurations]; + fEndpointToIndex = new(std::nothrow) map [fDeviceDescriptor.num_configurations]; + fEndpointToInterface = new(std::nothrow) map [fDeviceDescriptor.num_configurations]; + for (int i = 0; i < fDeviceDescriptor.num_configurations; i++) { + usb_configuration_descriptor tmp_config; + command.config.descriptor = &tmp_config; + command.config.config_index = i; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_GET_CONFIGURATION_DESCRIPTOR, &command, sizeof(command)) || + command.config.status != B_USB_RAW_STATUS_SUCCESS) { + usbi_err(NULL, "failed retrieving configuration descriptor"); + close(fRawFD); + return B_ERROR; + } + fConfigToIndex[tmp_config.configuration_value] = i; + fConfigurationDescriptors[i] = new(std::nothrow) unsigned char[tmp_config.total_length]; + command.control.request_type = 128; + command.control.request = 6; + command.control.value = (2 << 8) | i; + command.control.index = 0; + command.control.length = tmp_config.total_length; + command.control.data = fConfigurationDescriptors[i]; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_CONTROL_TRANSFER, &command, sizeof(command)) || + command.control.status!=B_USB_RAW_STATUS_SUCCESS) { + usbi_err(NULL, "failed retrieving full configuration descriptor"); + close(fRawFD); + return B_ERROR; + } + for (int j = 0; j < tmp_config.number_interfaces; j++) { + command.alternate.config_index = i; + command.alternate.interface_index = j; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_GET_ALT_INTERFACE_COUNT, &command, sizeof(command)) || + command.config.status != B_USB_RAW_STATUS_SUCCESS) { + usbi_err(NULL, "failed retrieving number of alternate interfaces"); + close(fRawFD); + return B_ERROR; + } + int num_alternate = command.alternate.alternate_info; + for (int k = 0; k < num_alternate; k++) { + usb_interface_descriptor tmp_interface; + command.interface_etc.config_index = i; + command.interface_etc.interface_index = j; + command.interface_etc.alternate_index = k; + command.interface_etc.descriptor = &tmp_interface; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_GET_INTERFACE_DESCRIPTOR_ETC, &command, sizeof(command)) || + command.config.status != B_USB_RAW_STATUS_SUCCESS) { + usbi_err(NULL, "failed retrieving interface descriptor"); + close(fRawFD); + return B_ERROR; + } + for (int l = 0; l < tmp_interface.num_endpoints; l++) { + usb_endpoint_descriptor tmp_endpoint; + command.endpoint_etc.config_index = i; + command.endpoint_etc.interface_index = j; + command.endpoint_etc.alternate_index = k; + command.endpoint_etc.endpoint_index = l; + command.endpoint_etc.descriptor = &tmp_endpoint; + if (ioctl(fRawFD, B_USB_RAW_COMMAND_GET_ENDPOINT_DESCRIPTOR_ETC, &command, sizeof(command)) || + command.config.status != B_USB_RAW_STATUS_SUCCESS) { + usbi_err(NULL, "failed retrieving endpoint descriptor"); + close(fRawFD); + return B_ERROR; + } + fEndpointToIndex[i][tmp_endpoint.endpoint_address] = l; + fEndpointToInterface[i][tmp_endpoint.endpoint_address] = j; + } + } + } + } + close(fRawFD); + fInitCheck = true; + return B_OK; +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb_raw.cpp b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb_raw.cpp new file mode 100644 index 000000000..77adbd1e6 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb_raw.cpp @@ -0,0 +1,250 @@ +/* + * Haiku Backend for libusb + * Copyright © 2014 Akshay Jaggi + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + + +#include +#include +#include +#include +#include + +#include "haiku_usb.h" + +USBRoster gUsbRoster; +int32 gInitCount = 0; + +static int +haiku_init(struct libusb_context *ctx) +{ + if (atomic_add(&gInitCount, 1) == 0) + return gUsbRoster.Start(); + return LIBUSB_SUCCESS; +} + +static void +haiku_exit(void) +{ + if (atomic_add(&gInitCount, -1) == 1) + gUsbRoster.Stop(); +} + +static int +haiku_open(struct libusb_device_handle *dev_handle) +{ + USBDevice *dev = *((USBDevice **)dev_handle->dev->os_priv); + USBDeviceHandle *handle = new(std::nothrow) USBDeviceHandle(dev); + if (handle == NULL) + return LIBUSB_ERROR_NO_MEM; + if (handle->InitCheck() == false) { + delete handle; + return LIBUSB_ERROR_NO_DEVICE; + } + *((USBDeviceHandle **)dev_handle->os_priv) = handle; + return LIBUSB_SUCCESS; +} + +static void +haiku_close(struct libusb_device_handle *dev_handle) +{ + USBDeviceHandle *handle = *((USBDeviceHandle **)dev_handle->os_priv); + if (handle == NULL) + return; + delete handle; + *((USBDeviceHandle **)dev_handle->os_priv) = NULL; +} + +static int +haiku_get_device_descriptor(struct libusb_device *device, unsigned char *buffer, int *host_endian) +{ + USBDevice *dev = *((USBDevice **)device->os_priv); + memcpy(buffer, dev->Descriptor(), DEVICE_DESC_LENGTH); + *host_endian = 0; + return LIBUSB_SUCCESS; +} + +static int +haiku_get_active_config_descriptor(struct libusb_device *device, unsigned char *buffer, size_t len, int *host_endian) +{ + USBDevice *dev = *((USBDevice **)device->os_priv); + const usb_configuration_descriptor *act_config = dev->ActiveConfiguration(); + if (len > act_config->total_length) + return LIBUSB_ERROR_OVERFLOW; + memcpy(buffer, act_config, len); + *host_endian = 0; + return LIBUSB_SUCCESS; +} + +static int +haiku_get_config_descriptor(struct libusb_device *device, uint8_t config_index, unsigned char *buffer, size_t len, int *host_endian) +{ + USBDevice *dev = *((USBDevice **)device->os_priv); + const usb_configuration_descriptor *config = dev->ConfigurationDescriptor(config_index); + if (config == NULL) { + usbi_err(DEVICE_CTX(device), "failed getting configuration descriptor"); + return LIBUSB_ERROR_INVALID_PARAM; + } + if (len > config->total_length) + len = config->total_length; + memcpy(buffer, config, len); + *host_endian = 0; + return len; +} + +static int +haiku_set_configuration(struct libusb_device_handle *dev_handle, int config) +{ + USBDeviceHandle *handle= *((USBDeviceHandle **)dev_handle->os_priv); + return handle->SetConfiguration(config); +} + +static int +haiku_claim_interface(struct libusb_device_handle *dev_handle, int interface_number) +{ + USBDeviceHandle *handle = *((USBDeviceHandle **)dev_handle->os_priv); + return handle->ClaimInterface(interface_number); +} + +static int +haiku_set_altsetting(struct libusb_device_handle *dev_handle, int interface_number, int altsetting) +{ + USBDeviceHandle *handle = *((USBDeviceHandle **)dev_handle->os_priv); + return handle->SetAltSetting(interface_number, altsetting); +} + +static int +haiku_release_interface(struct libusb_device_handle *dev_handle, int interface_number) +{ + USBDeviceHandle *handle = *((USBDeviceHandle **)dev_handle->os_priv); + haiku_set_altsetting(dev_handle,interface_number, 0); + return handle->ReleaseInterface(interface_number); +} + +static int +haiku_submit_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *fLibusbTransfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + USBDeviceHandle *fDeviceHandle = *((USBDeviceHandle **)fLibusbTransfer->dev_handle->os_priv); + return fDeviceHandle->SubmitTransfer(itransfer); +} + +static int +haiku_cancel_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *fLibusbTransfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + USBDeviceHandle *fDeviceHandle = *((USBDeviceHandle **)fLibusbTransfer->dev_handle->os_priv); + return fDeviceHandle->CancelTransfer(*((USBTransfer **)usbi_transfer_get_os_priv(itransfer))); +} + +static void +haiku_clear_transfer_priv(struct usbi_transfer *itransfer) +{ + USBTransfer *transfer = *((USBTransfer **)usbi_transfer_get_os_priv(itransfer)); + delete transfer; + *((USBTransfer **)usbi_transfer_get_os_priv(itransfer)) = NULL; +} + +static int +haiku_handle_transfer_completion(struct usbi_transfer *itransfer) +{ + USBTransfer *transfer = *((USBTransfer **)usbi_transfer_get_os_priv(itransfer)); + + usbi_mutex_lock(&itransfer->lock); + if (transfer->IsCancelled()) { + delete transfer; + *((USBTransfer **)usbi_transfer_get_os_priv(itransfer)) = NULL; + usbi_mutex_unlock(&itransfer->lock); + if (itransfer->transferred < 0) + itransfer->transferred = 0; + return usbi_handle_transfer_cancellation(itransfer); + } + libusb_transfer_status status = LIBUSB_TRANSFER_COMPLETED; + if (itransfer->transferred < 0) { + usbi_err(ITRANSFER_CTX(itransfer), "error in transfer"); + status = LIBUSB_TRANSFER_ERROR; + itransfer->transferred = 0; + } + delete transfer; + *((USBTransfer **)usbi_transfer_get_os_priv(itransfer)) = NULL; + usbi_mutex_unlock(&itransfer->lock); + return usbi_handle_transfer_completion(itransfer, status); +} + +static int +haiku_clock_gettime(int clkid, struct timespec *tp) +{ + if (clkid == USBI_CLOCK_REALTIME) + return clock_gettime(CLOCK_REALTIME, tp); + if (clkid == USBI_CLOCK_MONOTONIC) + return clock_gettime(CLOCK_MONOTONIC, tp); + return LIBUSB_ERROR_INVALID_PARAM; +} + +const struct usbi_os_backend haiku_usb_raw_backend = { + /*.name =*/ "Haiku usbfs", + /*.caps =*/ 0, + /*.init =*/ haiku_init, + /*.exit =*/ haiku_exit, + /*.get_device_list =*/ NULL, + /*.hotplug_poll =*/ NULL, + /*.open =*/ haiku_open, + /*.close =*/ haiku_close, + /*.get_device_descriptor =*/ haiku_get_device_descriptor, + /*.get_active_config_descriptor =*/ haiku_get_active_config_descriptor, + /*.get_config_descriptor =*/ haiku_get_config_descriptor, + /*.get_config_descriptor_by_value =*/ NULL, + + + /*.get_configuration =*/ NULL, + /*.set_configuration =*/ haiku_set_configuration, + /*.claim_interface =*/ haiku_claim_interface, + /*.release_interface =*/ haiku_release_interface, + + /*.set_interface_altsetting =*/ haiku_set_altsetting, + /*.clear_halt =*/ NULL, + /*.reset_device =*/ NULL, + + /*.alloc_streams =*/ NULL, + /*.free_streams =*/ NULL, + + /*.dev_mem_alloc =*/ NULL, + /*.dev_mem_free =*/ NULL, + + /*.kernel_driver_active =*/ NULL, + /*.detach_kernel_driver =*/ NULL, + /*.attach_kernel_driver =*/ NULL, + + /*.destroy_device =*/ NULL, + + /*.submit_transfer =*/ haiku_submit_transfer, + /*.cancel_transfer =*/ haiku_cancel_transfer, + /*.clear_transfer_priv =*/ haiku_clear_transfer_priv, + + /*.handle_events =*/ NULL, + /*.handle_transfer_completion =*/ haiku_handle_transfer_completion, + + /*.clock_gettime =*/ haiku_clock_gettime, + +#ifdef USBI_TIMERFD_AVAILABLE + /*.get_timerfd_clockid =*/ NULL, +#endif + + /*.device_priv_size =*/ sizeof(USBDevice *), + /*.device_handle_priv_size =*/ sizeof(USBDeviceHandle *), + /*.transfer_priv_size =*/ sizeof(USBTransfer *), +}; diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb_raw.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb_raw.h new file mode 100644 index 000000000..5baf53d7c --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/haiku_usb_raw.h @@ -0,0 +1,180 @@ +/* + * Copyright 2006-2008, Haiku Inc. All rights reserved. + * Distributed under the terms of the MIT License. + */ + +#ifndef _USB_RAW_H_ +#define _USB_RAW_H_ + +#include + +#define B_USB_RAW_PROTOCOL_VERSION 0x0015 +#define B_USB_RAW_ACTIVE_ALTERNATE 0xffffffff + +typedef enum { + B_USB_RAW_COMMAND_GET_VERSION = 0x1000, + + B_USB_RAW_COMMAND_GET_DEVICE_DESCRIPTOR = 0x2000, + B_USB_RAW_COMMAND_GET_CONFIGURATION_DESCRIPTOR, + B_USB_RAW_COMMAND_GET_INTERFACE_DESCRIPTOR, + B_USB_RAW_COMMAND_GET_ENDPOINT_DESCRIPTOR, + B_USB_RAW_COMMAND_GET_STRING_DESCRIPTOR, + B_USB_RAW_COMMAND_GET_GENERIC_DESCRIPTOR, + B_USB_RAW_COMMAND_GET_ALT_INTERFACE_COUNT, + B_USB_RAW_COMMAND_GET_ACTIVE_ALT_INTERFACE_INDEX, + B_USB_RAW_COMMAND_GET_INTERFACE_DESCRIPTOR_ETC, + B_USB_RAW_COMMAND_GET_ENDPOINT_DESCRIPTOR_ETC, + B_USB_RAW_COMMAND_GET_GENERIC_DESCRIPTOR_ETC, + + B_USB_RAW_COMMAND_SET_CONFIGURATION = 0x3000, + B_USB_RAW_COMMAND_SET_FEATURE, + B_USB_RAW_COMMAND_CLEAR_FEATURE, + B_USB_RAW_COMMAND_GET_STATUS, + B_USB_RAW_COMMAND_GET_DESCRIPTOR, + B_USB_RAW_COMMAND_SET_ALT_INTERFACE, + + B_USB_RAW_COMMAND_CONTROL_TRANSFER = 0x4000, + B_USB_RAW_COMMAND_INTERRUPT_TRANSFER, + B_USB_RAW_COMMAND_BULK_TRANSFER, + B_USB_RAW_COMMAND_ISOCHRONOUS_TRANSFER +} usb_raw_command_id; + + +typedef enum { + B_USB_RAW_STATUS_SUCCESS = 0, + + B_USB_RAW_STATUS_FAILED, + B_USB_RAW_STATUS_ABORTED, + B_USB_RAW_STATUS_STALLED, + B_USB_RAW_STATUS_CRC_ERROR, + B_USB_RAW_STATUS_TIMEOUT, + + B_USB_RAW_STATUS_INVALID_CONFIGURATION, + B_USB_RAW_STATUS_INVALID_INTERFACE, + B_USB_RAW_STATUS_INVALID_ENDPOINT, + B_USB_RAW_STATUS_INVALID_STRING, + + B_USB_RAW_STATUS_NO_MEMORY +} usb_raw_command_status; + + +typedef union { + struct { + status_t status; + } version; + + struct { + status_t status; + usb_device_descriptor *descriptor; + } device; + + struct { + status_t status; + usb_configuration_descriptor *descriptor; + uint32 config_index; + } config; + + struct { + status_t status; + uint32 alternate_info; + uint32 config_index; + uint32 interface_index; + } alternate; + + struct { + status_t status; + usb_interface_descriptor *descriptor; + uint32 config_index; + uint32 interface_index; + } interface; + + struct { + status_t status; + usb_interface_descriptor *descriptor; + uint32 config_index; + uint32 interface_index; + uint32 alternate_index; + } interface_etc; + + struct { + status_t status; + usb_endpoint_descriptor *descriptor; + uint32 config_index; + uint32 interface_index; + uint32 endpoint_index; + } endpoint; + + struct { + status_t status; + usb_endpoint_descriptor *descriptor; + uint32 config_index; + uint32 interface_index; + uint32 alternate_index; + uint32 endpoint_index; + } endpoint_etc; + + struct { + status_t status; + usb_descriptor *descriptor; + uint32 config_index; + uint32 interface_index; + uint32 generic_index; + size_t length; + } generic; + + struct { + status_t status; + usb_descriptor *descriptor; + uint32 config_index; + uint32 interface_index; + uint32 alternate_index; + uint32 generic_index; + size_t length; + } generic_etc; + + struct { + status_t status; + usb_string_descriptor *descriptor; + uint32 string_index; + size_t length; + } string; + + struct { + status_t status; + uint8 type; + uint8 index; + uint16 language_id; + void *data; + size_t length; + } descriptor; + + struct { + status_t status; + uint8 request_type; + uint8 request; + uint16 value; + uint16 index; + uint16 length; + void *data; + } control; + + struct { + status_t status; + uint32 interface; + uint32 endpoint; + void *data; + size_t length; + } transfer; + + struct { + status_t status; + uint32 interface; + uint32 endpoint; + void *data; + size_t length; + usb_iso_packet_descriptor *packet_descriptors; + uint32 packet_count; + } isochronous; +} usb_raw_command; + +#endif // _USB_RAW_H_ diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_netlink.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_netlink.c new file mode 100644 index 000000000..60cf3ad1b --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_netlink.c @@ -0,0 +1,400 @@ +/* -*- Mode: C; c-basic-offset:8 ; indent-tabs-mode:t -*- */ +/* + * Linux usbfs backend for libusb + * Copyright (C) 2007-2009 Daniel Drake + * Copyright (c) 2001 Johannes Erdfelt + * Copyright (c) 2013 Nathan Hjelm + * Copyright (c) 2016 Chris Dickens + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef HAVE_ASM_TYPES_H +#include +#endif + +#include +#include + +#include "libusbi.h" +#include "linux_usbfs.h" + +#define NL_GROUP_KERNEL 1 + +static int linux_netlink_socket = -1; +static int netlink_control_pipe[2] = { -1, -1 }; +static pthread_t libusb_linux_event_thread; + +static void *linux_netlink_event_thread_main(void *arg); + +static int set_fd_cloexec_nb(int fd) +{ + int flags; + +#if defined(FD_CLOEXEC) + flags = fcntl(fd, F_GETFD); + if (flags == -1) { + usbi_err(NULL, "failed to get netlink fd flags (%d)", errno); + return -1; + } + + if (!(flags & FD_CLOEXEC)) { + if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) { + usbi_err(NULL, "failed to set netlink fd flags (%d)", errno); + return -1; + } + } +#endif + + flags = fcntl(fd, F_GETFL); + if (flags == -1) { + usbi_err(NULL, "failed to get netlink fd status flags (%d)", errno); + return -1; + } + + if (!(flags & O_NONBLOCK)) { + if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) { + usbi_err(NULL, "failed to set netlink fd status flags (%d)", errno); + return -1; + } + } + + return 0; +} + +int linux_netlink_start_event_monitor(void) +{ + struct sockaddr_nl sa_nl = { .nl_family = AF_NETLINK, .nl_groups = NL_GROUP_KERNEL }; + int socktype = SOCK_RAW; + int opt = 1; + int ret; + +#if defined(SOCK_CLOEXEC) + socktype |= SOCK_CLOEXEC; +#endif +#if defined(SOCK_NONBLOCK) + socktype |= SOCK_NONBLOCK; +#endif + + linux_netlink_socket = socket(PF_NETLINK, socktype, NETLINK_KOBJECT_UEVENT); + if (linux_netlink_socket == -1 && errno == EINVAL) { + usbi_dbg("failed to create netlink socket of type %d, attempting SOCK_RAW", socktype); + linux_netlink_socket = socket(PF_NETLINK, SOCK_RAW, NETLINK_KOBJECT_UEVENT); + } + + if (linux_netlink_socket == -1) { + usbi_err(NULL, "failed to create netlink socket (%d)", errno); + goto err; + } + + ret = set_fd_cloexec_nb(linux_netlink_socket); + if (ret == -1) + goto err_close_socket; + + ret = bind(linux_netlink_socket, (struct sockaddr *)&sa_nl, sizeof(sa_nl)); + if (ret == -1) { + usbi_err(NULL, "failed to bind netlink socket (%d)", errno); + goto err_close_socket; + } + + ret = setsockopt(linux_netlink_socket, SOL_SOCKET, SO_PASSCRED, &opt, sizeof(opt)); + if (ret == -1) { + usbi_err(NULL, "failed to set netlink socket SO_PASSCRED option (%d)", errno); + goto err_close_socket; + } + + ret = usbi_pipe(netlink_control_pipe); + if (ret) { + usbi_err(NULL, "failed to create netlink control pipe"); + goto err_close_socket; + } + + ret = pthread_create(&libusb_linux_event_thread, NULL, linux_netlink_event_thread_main, NULL); + if (ret != 0) { + usbi_err(NULL, "failed to create netlink event thread (%d)", ret); + goto err_close_pipe; + } + + return LIBUSB_SUCCESS; + +err_close_pipe: + close(netlink_control_pipe[0]); + close(netlink_control_pipe[1]); + netlink_control_pipe[0] = -1; + netlink_control_pipe[1] = -1; +err_close_socket: + close(linux_netlink_socket); + linux_netlink_socket = -1; +err: + return LIBUSB_ERROR_OTHER; +} + +int linux_netlink_stop_event_monitor(void) +{ + char dummy = 1; + ssize_t r; + + assert(linux_netlink_socket != -1); + + /* Write some dummy data to the control pipe and + * wait for the thread to exit */ + r = usbi_write(netlink_control_pipe[1], &dummy, sizeof(dummy)); + if (r <= 0) + usbi_warn(NULL, "netlink control pipe signal failed"); + + pthread_join(libusb_linux_event_thread, NULL); + + close(linux_netlink_socket); + linux_netlink_socket = -1; + + /* close and reset control pipe */ + close(netlink_control_pipe[0]); + close(netlink_control_pipe[1]); + netlink_control_pipe[0] = -1; + netlink_control_pipe[1] = -1; + + return LIBUSB_SUCCESS; +} + +static const char *netlink_message_parse(const char *buffer, size_t len, const char *key) +{ + const char *end = buffer + len; + size_t keylen = strlen(key); + + while (buffer < end && *buffer) { + if (strncmp(buffer, key, keylen) == 0 && buffer[keylen] == '=') + return buffer + keylen + 1; + buffer += strlen(buffer) + 1; + } + + return NULL; +} + +/* parse parts of netlink message common to both libudev and the kernel */ +static int linux_netlink_parse(const char *buffer, size_t len, int *detached, + const char **sys_name, uint8_t *busnum, uint8_t *devaddr) +{ + const char *tmp, *slash; + + errno = 0; + + *sys_name = NULL; + *detached = 0; + *busnum = 0; + *devaddr = 0; + + tmp = netlink_message_parse(buffer, len, "ACTION"); + if (!tmp) { + return -1; + } else if (strcmp(tmp, "remove") == 0) { + *detached = 1; + } else if (strcmp(tmp, "add") != 0) { + usbi_dbg("unknown device action %s", tmp); + return -1; + } + + /* check that this is a usb message */ + tmp = netlink_message_parse(buffer, len, "SUBSYSTEM"); + if (!tmp || strcmp(tmp, "usb") != 0) { + /* not usb. ignore */ + return -1; + } + + /* check that this is an actual usb device */ + tmp = netlink_message_parse(buffer, len, "DEVTYPE"); + if (!tmp || strcmp(tmp, "usb_device") != 0) { + /* not usb. ignore */ + return -1; + } + + tmp = netlink_message_parse(buffer, len, "BUSNUM"); + if (tmp) { + *busnum = (uint8_t)(strtoul(tmp, NULL, 10) & 0xff); + if (errno) { + errno = 0; + return -1; + } + + tmp = netlink_message_parse(buffer, len, "DEVNUM"); + if (NULL == tmp) + return -1; + + *devaddr = (uint8_t)(strtoul(tmp, NULL, 10) & 0xff); + if (errno) { + errno = 0; + return -1; + } + } else { + /* no bus number. try "DEVICE" */ + tmp = netlink_message_parse(buffer, len, "DEVICE"); + if (!tmp) { + /* not usb. ignore */ + return -1; + } + + /* Parse a device path such as /dev/bus/usb/003/004 */ + slash = strrchr(tmp, '/'); + if (!slash) + return -1; + + *busnum = (uint8_t)(strtoul(slash - 3, NULL, 10) & 0xff); + if (errno) { + errno = 0; + return -1; + } + + *devaddr = (uint8_t)(strtoul(slash + 1, NULL, 10) & 0xff); + if (errno) { + errno = 0; + return -1; + } + + return 0; + } + + tmp = netlink_message_parse(buffer, len, "DEVPATH"); + if (!tmp) + return -1; + + slash = strrchr(tmp, '/'); + if (slash) + *sys_name = slash + 1; + + /* found a usb device */ + return 0; +} + +static int linux_netlink_read_message(void) +{ + char cred_buffer[CMSG_SPACE(sizeof(struct ucred))]; + char msg_buffer[2048]; + const char *sys_name = NULL; + uint8_t busnum, devaddr; + int detached, r; + ssize_t len; + struct cmsghdr *cmsg; + struct ucred *cred; + struct sockaddr_nl sa_nl; + struct iovec iov = { .iov_base = msg_buffer, .iov_len = sizeof(msg_buffer) }; + struct msghdr msg = { + .msg_iov = &iov, .msg_iovlen = 1, + .msg_control = cred_buffer, .msg_controllen = sizeof(cred_buffer), + .msg_name = &sa_nl, .msg_namelen = sizeof(sa_nl) + }; + + /* read netlink message */ + len = recvmsg(linux_netlink_socket, &msg, 0); + if (len == -1) { + if (errno != EAGAIN && errno != EINTR) + usbi_err(NULL, "error receiving message from netlink (%d)", errno); + return -1; + } + + if (len < 32 || (msg.msg_flags & MSG_TRUNC)) { + usbi_err(NULL, "invalid netlink message length"); + return -1; + } + + if (sa_nl.nl_groups != NL_GROUP_KERNEL || sa_nl.nl_pid != 0) { + usbi_dbg("ignoring netlink message from unknown group/PID (%u/%u)", + (unsigned int)sa_nl.nl_groups, (unsigned int)sa_nl.nl_pid); + return -1; + } + + cmsg = CMSG_FIRSTHDR(&msg); + if (!cmsg || cmsg->cmsg_type != SCM_CREDENTIALS) { + usbi_dbg("ignoring netlink message with no sender credentials"); + return -1; + } + + cred = (struct ucred *)CMSG_DATA(cmsg); + if (cred->uid != 0) { + usbi_dbg("ignoring netlink message with non-zero sender UID %u", (unsigned int)cred->uid); + return -1; + } + + r = linux_netlink_parse(msg_buffer, (size_t)len, &detached, &sys_name, &busnum, &devaddr); + if (r) + return r; + + usbi_dbg("netlink hotplug found device busnum: %hhu, devaddr: %hhu, sys_name: %s, removed: %s", + busnum, devaddr, sys_name, detached ? "yes" : "no"); + + /* signal device is available (or not) to all contexts */ + if (detached) + linux_device_disconnected(busnum, devaddr); + else + linux_hotplug_enumerate(busnum, devaddr, sys_name); + + return 0; +} + +static void *linux_netlink_event_thread_main(void *arg) +{ + char dummy; + ssize_t r; + struct pollfd fds[] = { + { .fd = netlink_control_pipe[0], + .events = POLLIN }, + { .fd = linux_netlink_socket, + .events = POLLIN }, + }; + + UNUSED(arg); + + usbi_dbg("netlink event thread entering"); + + while (poll(fds, 2, -1) >= 0) { + if (fds[0].revents & POLLIN) { + /* activity on control pipe, read the byte and exit */ + r = usbi_read(netlink_control_pipe[0], &dummy, sizeof(dummy)); + if (r <= 0) + usbi_warn(NULL, "netlink control pipe read failed"); + break; + } + if (fds[1].revents & POLLIN) { + usbi_mutex_static_lock(&linux_hotplug_lock); + linux_netlink_read_message(); + usbi_mutex_static_unlock(&linux_hotplug_lock); + } + } + + usbi_dbg("netlink event thread exiting"); + + return NULL; +} + +void linux_netlink_hotplug_poll(void) +{ + int r; + + usbi_mutex_static_lock(&linux_hotplug_lock); + do { + r = linux_netlink_read_message(); + } while (r == 0); + usbi_mutex_static_unlock(&linux_hotplug_lock); +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_udev.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_udev.c new file mode 100644 index 000000000..61d953d8c --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_udev.c @@ -0,0 +1,311 @@ +/* -*- Mode: C; c-basic-offset:8 ; indent-tabs-mode:t -*- */ +/* + * Linux usbfs backend for libusb + * Copyright (C) 2007-2009 Daniel Drake + * Copyright (c) 2001 Johannes Erdfelt + * Copyright (c) 2012-2013 Nathan Hjelm + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "libusbi.h" +#include "linux_usbfs.h" + +/* udev context */ +static struct udev *udev_ctx = NULL; +static int udev_monitor_fd = -1; +static int udev_control_pipe[2] = {-1, -1}; +static struct udev_monitor *udev_monitor = NULL; +static pthread_t linux_event_thread; + +static void udev_hotplug_event(struct udev_device* udev_dev); +static void *linux_udev_event_thread_main(void *arg); + +int linux_udev_start_event_monitor(void) +{ + int r; + + assert(udev_ctx == NULL); + udev_ctx = udev_new(); + if (!udev_ctx) { + usbi_err(NULL, "could not create udev context"); + goto err; + } + + udev_monitor = udev_monitor_new_from_netlink(udev_ctx, "udev"); + if (!udev_monitor) { + usbi_err(NULL, "could not initialize udev monitor"); + goto err_free_ctx; + } + + r = udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "usb", "usb_device"); + if (r) { + usbi_err(NULL, "could not initialize udev monitor filter for \"usb\" subsystem"); + goto err_free_monitor; + } + + if (udev_monitor_enable_receiving(udev_monitor)) { + usbi_err(NULL, "failed to enable the udev monitor"); + goto err_free_monitor; + } + + udev_monitor_fd = udev_monitor_get_fd(udev_monitor); + + /* Some older versions of udev are not non-blocking by default, + * so make sure this is set */ + r = fcntl(udev_monitor_fd, F_GETFL); + if (r == -1) { + usbi_err(NULL, "getting udev monitor fd flags (%d)", errno); + goto err_free_monitor; + } + r = fcntl(udev_monitor_fd, F_SETFL, r | O_NONBLOCK); + if (r) { + usbi_err(NULL, "setting udev monitor fd flags (%d)", errno); + goto err_free_monitor; + } + + r = usbi_pipe(udev_control_pipe); + if (r) { + usbi_err(NULL, "could not create udev control pipe"); + goto err_free_monitor; + } + + r = pthread_create(&linux_event_thread, NULL, linux_udev_event_thread_main, NULL); + if (r) { + usbi_err(NULL, "creating hotplug event thread (%d)", r); + goto err_close_pipe; + } + + return LIBUSB_SUCCESS; + +err_close_pipe: + close(udev_control_pipe[0]); + close(udev_control_pipe[1]); +err_free_monitor: + udev_monitor_unref(udev_monitor); + udev_monitor = NULL; + udev_monitor_fd = -1; +err_free_ctx: + udev_unref(udev_ctx); +err: + udev_ctx = NULL; + return LIBUSB_ERROR_OTHER; +} + +int linux_udev_stop_event_monitor(void) +{ + char dummy = 1; + int r; + + assert(udev_ctx != NULL); + assert(udev_monitor != NULL); + assert(udev_monitor_fd != -1); + + /* Write some dummy data to the control pipe and + * wait for the thread to exit */ + r = usbi_write(udev_control_pipe[1], &dummy, sizeof(dummy)); + if (r <= 0) { + usbi_warn(NULL, "udev control pipe signal failed"); + } + pthread_join(linux_event_thread, NULL); + + /* Release the udev monitor */ + udev_monitor_unref(udev_monitor); + udev_monitor = NULL; + udev_monitor_fd = -1; + + /* Clean up the udev context */ + udev_unref(udev_ctx); + udev_ctx = NULL; + + /* close and reset control pipe */ + close(udev_control_pipe[0]); + close(udev_control_pipe[1]); + udev_control_pipe[0] = -1; + udev_control_pipe[1] = -1; + + return LIBUSB_SUCCESS; +} + +static void *linux_udev_event_thread_main(void *arg) +{ + char dummy; + int r; + struct udev_device* udev_dev; + struct pollfd fds[] = { + {.fd = udev_control_pipe[0], + .events = POLLIN}, + {.fd = udev_monitor_fd, + .events = POLLIN}, + }; + + usbi_dbg("udev event thread entering."); + + while ((r = poll(fds, 2, -1)) >= 0 || errno == EINTR) { + if (r < 0) { + /* temporary failure */ + continue; + } + if (fds[0].revents & POLLIN) { + /* activity on control pipe, read the byte and exit */ + r = usbi_read(udev_control_pipe[0], &dummy, sizeof(dummy)); + if (r <= 0) { + usbi_warn(NULL, "udev control pipe read failed"); + } + break; + } + if (fds[1].revents & POLLIN) { + usbi_mutex_static_lock(&linux_hotplug_lock); + udev_dev = udev_monitor_receive_device(udev_monitor); + if (udev_dev) + udev_hotplug_event(udev_dev); + usbi_mutex_static_unlock(&linux_hotplug_lock); + } + } + + usbi_dbg("udev event thread exiting"); + + return NULL; +} + +static int udev_device_info(struct libusb_context *ctx, int detached, + struct udev_device *udev_dev, uint8_t *busnum, + uint8_t *devaddr, const char **sys_name) { + const char *dev_node; + + dev_node = udev_device_get_devnode(udev_dev); + if (!dev_node) { + return LIBUSB_ERROR_OTHER; + } + + *sys_name = udev_device_get_sysname(udev_dev); + if (!*sys_name) { + return LIBUSB_ERROR_OTHER; + } + + return linux_get_device_address(ctx, detached, busnum, devaddr, + dev_node, *sys_name); +} + +static void udev_hotplug_event(struct udev_device* udev_dev) +{ + const char* udev_action; + const char* sys_name = NULL; + uint8_t busnum = 0, devaddr = 0; + int detached; + int r; + + do { + udev_action = udev_device_get_action(udev_dev); + if (!udev_action) { + break; + } + + detached = !strncmp(udev_action, "remove", 6); + + r = udev_device_info(NULL, detached, udev_dev, &busnum, &devaddr, &sys_name); + if (LIBUSB_SUCCESS != r) { + break; + } + + usbi_dbg("udev hotplug event. action: %s.", udev_action); + + if (strncmp(udev_action, "add", 3) == 0) { + linux_hotplug_enumerate(busnum, devaddr, sys_name); + } else if (detached) { + linux_device_disconnected(busnum, devaddr); + } else { + usbi_err(NULL, "ignoring udev action %s", udev_action); + } + } while (0); + + udev_device_unref(udev_dev); +} + +int linux_udev_scan_devices(struct libusb_context *ctx) +{ + struct udev_enumerate *enumerator; + struct udev_list_entry *devices, *entry; + struct udev_device *udev_dev; + const char *sys_name; + int r; + + assert(udev_ctx != NULL); + + enumerator = udev_enumerate_new(udev_ctx); + if (NULL == enumerator) { + usbi_err(ctx, "error creating udev enumerator"); + return LIBUSB_ERROR_OTHER; + } + + udev_enumerate_add_match_subsystem(enumerator, "usb"); + udev_enumerate_add_match_property(enumerator, "DEVTYPE", "usb_device"); + udev_enumerate_scan_devices(enumerator); + devices = udev_enumerate_get_list_entry(enumerator); + + udev_list_entry_foreach(entry, devices) { + const char *path = udev_list_entry_get_name(entry); + uint8_t busnum = 0, devaddr = 0; + + udev_dev = udev_device_new_from_syspath(udev_ctx, path); + + r = udev_device_info(ctx, 0, udev_dev, &busnum, &devaddr, &sys_name); + if (r) { + udev_device_unref(udev_dev); + continue; + } + + linux_enumerate_device(ctx, busnum, devaddr, sys_name); + udev_device_unref(udev_dev); + } + + udev_enumerate_unref(enumerator); + + return LIBUSB_SUCCESS; +} + +void linux_udev_hotplug_poll(void) +{ + struct udev_device* udev_dev; + + usbi_mutex_static_lock(&linux_hotplug_lock); + do { + udev_dev = udev_monitor_receive_device(udev_monitor); + if (udev_dev) { + usbi_dbg("Handling hotplug event from hotplug_poll"); + udev_hotplug_event(udev_dev); + } + } while (udev_dev); + usbi_mutex_static_unlock(&linux_hotplug_lock); +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_usbfs.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_usbfs.c new file mode 100644 index 000000000..6b89ba288 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_usbfs.c @@ -0,0 +1,2738 @@ +/* -*- Mode: C; c-basic-offset:8 ; indent-tabs-mode:t -*- */ +/* + * Linux usbfs backend for libusb + * Copyright © 2007-2009 Daniel Drake + * Copyright © 2001 Johannes Erdfelt + * Copyright © 2013 Nathan Hjelm + * Copyright © 2012-2013 Hans de Goede + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "config.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "libusbi.h" +#include "linux_usbfs.h" + +/* sysfs vs usbfs: + * opening a usbfs node causes the device to be resumed, so we attempt to + * avoid this during enumeration. + * + * sysfs allows us to read the kernel's in-memory copies of device descriptors + * and so forth, avoiding the need to open the device: + * - The binary "descriptors" file contains all config descriptors since + * 2.6.26, commit 217a9081d8e69026186067711131b77f0ce219ed + * - The binary "descriptors" file was added in 2.6.23, commit + * 69d42a78f935d19384d1f6e4f94b65bb162b36df, but it only contains the + * active config descriptors + * - The "busnum" file was added in 2.6.22, commit + * 83f7d958eab2fbc6b159ee92bf1493924e1d0f72 + * - The "devnum" file has been present since pre-2.6.18 + * - the "bConfigurationValue" file has been present since pre-2.6.18 + * + * If we have bConfigurationValue, busnum, and devnum, then we can determine + * the active configuration without having to open the usbfs node in RDWR mode. + * The busnum file is important as that is the only way we can relate sysfs + * devices to usbfs nodes. + * + * If we also have all descriptors, we can obtain the device descriptor and + * configuration without touching usbfs at all. + */ + +/* endianness for multi-byte fields: + * + * Descriptors exposed by usbfs have the multi-byte fields in the device + * descriptor as host endian. Multi-byte fields in the other descriptors are + * bus-endian. The kernel documentation says otherwise, but it is wrong. + * + * In sysfs all descriptors are bus-endian. + */ + +static const char *usbfs_path = NULL; + +/* use usbdev*.* device names in /dev instead of the usbfs bus directories */ +static int usbdev_names = 0; + +/* Linux 2.6.32 adds support for a bulk continuation URB flag. this basically + * allows us to mark URBs as being part of a specific logical transfer when + * we submit them to the kernel. then, on any error except a cancellation, all + * URBs within that transfer will be cancelled and no more URBs will be + * accepted for the transfer, meaning that no more data can creep in. + * + * The BULK_CONTINUATION flag must be set on all URBs within a bulk transfer + * (in either direction) except the first. + * For IN transfers, we must also set SHORT_NOT_OK on all URBs except the + * last; it means that the kernel should treat a short reply as an error. + * For OUT transfers, SHORT_NOT_OK must not be set. it isn't needed (OUT + * transfers can't be short unless there's already some sort of error), and + * setting this flag is disallowed (a kernel with USB debugging enabled will + * reject such URBs). + */ +static int supports_flag_bulk_continuation = -1; + +/* Linux 2.6.31 fixes support for the zero length packet URB flag. This + * allows us to mark URBs that should be followed by a zero length data + * packet, which can be required by device- or class-specific protocols. + */ +static int supports_flag_zero_packet = -1; + +/* clock ID for monotonic clock, as not all clock sources are available on all + * systems. appropriate choice made at initialization time. */ +static clockid_t monotonic_clkid = -1; + +/* Linux 2.6.22 (commit 83f7d958eab2fbc6b159ee92bf1493924e1d0f72) adds a busnum + * to sysfs, so we can relate devices. This also implies that we can read + * the active configuration through bConfigurationValue */ +static int sysfs_can_relate_devices = -1; + +/* Linux 2.6.26 (commit 217a9081d8e69026186067711131b77f0ce219ed) adds all + * config descriptors (rather then just the active config) to the sysfs + * descriptors file, so from then on we can use them. */ +static int sysfs_has_descriptors = -1; + +/* how many times have we initted (and not exited) ? */ +static int init_count = 0; + +/* Serialize hotplug start/stop */ +static usbi_mutex_static_t linux_hotplug_startstop_lock = USBI_MUTEX_INITIALIZER; +/* Serialize scan-devices, event-thread, and poll */ +usbi_mutex_static_t linux_hotplug_lock = USBI_MUTEX_INITIALIZER; + +static int linux_start_event_monitor(void); +static int linux_stop_event_monitor(void); +static int linux_scan_devices(struct libusb_context *ctx); +static int sysfs_scan_device(struct libusb_context *ctx, const char *devname); +static int detach_kernel_driver_and_claim(struct libusb_device_handle *, int); + +#if !defined(USE_UDEV) +static int linux_default_scan_devices (struct libusb_context *ctx); +#endif + +struct linux_device_priv { + char *sysfs_dir; + unsigned char *descriptors; + int descriptors_len; + int active_config; /* cache val for !sysfs_can_relate_devices */ +}; + +struct linux_device_handle_priv { + int fd; + int fd_removed; + uint32_t caps; +}; + +enum reap_action { + NORMAL = 0, + /* submission failed after the first URB, so await cancellation/completion + * of all the others */ + SUBMIT_FAILED, + + /* cancelled by user or timeout */ + CANCELLED, + + /* completed multi-URB transfer in non-final URB */ + COMPLETED_EARLY, + + /* one or more urbs encountered a low-level error */ + ERROR, +}; + +struct linux_transfer_priv { + union { + struct usbfs_urb *urbs; + struct usbfs_urb **iso_urbs; + }; + + enum reap_action reap_action; + int num_urbs; + int num_retired; + enum libusb_transfer_status reap_status; + + /* next iso packet in user-supplied transfer to be populated */ + int iso_packet_offset; +}; + +static int _get_usbfs_fd(struct libusb_device *dev, mode_t mode, int silent) +{ + struct libusb_context *ctx = DEVICE_CTX(dev); + char path[PATH_MAX]; + int fd; + int delay = 10000; + + if (usbdev_names) + snprintf(path, PATH_MAX, "%s/usbdev%d.%d", + usbfs_path, dev->bus_number, dev->device_address); + else + snprintf(path, PATH_MAX, "%s/%03d/%03d", + usbfs_path, dev->bus_number, dev->device_address); + + fd = open(path, mode); + if (fd != -1) + return fd; /* Success */ + + if (errno == ENOENT) { + if (!silent) + usbi_err(ctx, "File doesn't exist, wait %d ms and try again", delay/1000); + + /* Wait 10ms for USB device path creation.*/ + nanosleep(&(struct timespec){delay / 1000000, (delay * 1000) % 1000000000UL}, NULL); + + fd = open(path, mode); + if (fd != -1) + return fd; /* Success */ + } + + if (!silent) { + usbi_err(ctx, "libusb couldn't open USB device %s: %s", + path, strerror(errno)); + if (errno == EACCES && mode == O_RDWR) + usbi_err(ctx, "libusb requires write access to USB " + "device nodes."); + } + + if (errno == EACCES) + return LIBUSB_ERROR_ACCESS; + if (errno == ENOENT) + return LIBUSB_ERROR_NO_DEVICE; + return LIBUSB_ERROR_IO; +} + +static struct linux_device_priv *_device_priv(struct libusb_device *dev) +{ + return (struct linux_device_priv *) dev->os_priv; +} + +static struct linux_device_handle_priv *_device_handle_priv( + struct libusb_device_handle *handle) +{ + return (struct linux_device_handle_priv *) handle->os_priv; +} + +/* check dirent for a /dev/usbdev%d.%d name + * optionally return bus/device on success */ +static int _is_usbdev_entry(struct dirent *entry, int *bus_p, int *dev_p) +{ + int busnum, devnum; + + if (sscanf(entry->d_name, "usbdev%d.%d", &busnum, &devnum) != 2) + return 0; + + usbi_dbg("found: %s", entry->d_name); + if (bus_p != NULL) + *bus_p = busnum; + if (dev_p != NULL) + *dev_p = devnum; + return 1; +} + +static int check_usb_vfs(const char *dirname) +{ + DIR *dir; + struct dirent *entry; + int found = 0; + + dir = opendir(dirname); + if (!dir) + return 0; + + while ((entry = readdir(dir)) != NULL) { + if (entry->d_name[0] == '.') + continue; + + /* We assume if we find any files that it must be the right place */ + found = 1; + break; + } + + closedir(dir); + return found; +} + +static const char *find_usbfs_path(void) +{ + const char *path = "/dev/bus/usb"; + const char *ret = NULL; + + if (check_usb_vfs(path)) { + ret = path; + } else { + path = "/proc/bus/usb"; + if (check_usb_vfs(path)) + ret = path; + } + + /* look for /dev/usbdev*.* if the normal places fail */ + if (ret == NULL) { + struct dirent *entry; + DIR *dir; + + path = "/dev"; + dir = opendir(path); + if (dir != NULL) { + while ((entry = readdir(dir)) != NULL) { + if (_is_usbdev_entry(entry, NULL, NULL)) { + /* found one; that's enough */ + ret = path; + usbdev_names = 1; + break; + } + } + closedir(dir); + } + } + +/* On udev based systems without any usb-devices /dev/bus/usb will not + * exist. So if we've not found anything and we're using udev for hotplug + * simply assume /dev/bus/usb rather then making libusb_init fail. */ +#if defined(USE_UDEV) + if (ret == NULL) + ret = "/dev/bus/usb"; +#endif + + if (ret != NULL) + usbi_dbg("found usbfs at %s", ret); + + return ret; +} + +/* the monotonic clock is not usable on all systems (e.g. embedded ones often + * seem to lack it). fall back to REALTIME if we have to. */ +static clockid_t find_monotonic_clock(void) +{ +#ifdef CLOCK_MONOTONIC + struct timespec ts; + int r; + + /* Linux 2.6.28 adds CLOCK_MONOTONIC_RAW but we don't use it + * because it's not available through timerfd */ + r = clock_gettime(CLOCK_MONOTONIC, &ts); + if (r == 0) + return CLOCK_MONOTONIC; + usbi_dbg("monotonic clock doesn't work, errno %d", errno); +#endif + + return CLOCK_REALTIME; +} + +static int kernel_version_ge(int major, int minor, int sublevel) +{ + struct utsname uts; + int atoms, kmajor, kminor, ksublevel; + + if (uname(&uts) < 0) + return -1; + atoms = sscanf(uts.release, "%d.%d.%d", &kmajor, &kminor, &ksublevel); + if (atoms < 1) + return -1; + + if (kmajor > major) + return 1; + if (kmajor < major) + return 0; + + /* kmajor == major */ + if (atoms < 2) + return 0 == minor && 0 == sublevel; + if (kminor > minor) + return 1; + if (kminor < minor) + return 0; + + /* kminor == minor */ + if (atoms < 3) + return 0 == sublevel; + + return ksublevel >= sublevel; +} + +static int op_init(struct libusb_context *ctx) +{ + struct stat statbuf; + int r; + + usbfs_path = find_usbfs_path(); + if (!usbfs_path) { + usbi_err(ctx, "could not find usbfs"); + return LIBUSB_ERROR_OTHER; + } + + if (monotonic_clkid == -1) + monotonic_clkid = find_monotonic_clock(); + + if (supports_flag_bulk_continuation == -1) { + /* bulk continuation URB flag available from Linux 2.6.32 */ + supports_flag_bulk_continuation = kernel_version_ge(2,6,32); + if (supports_flag_bulk_continuation == -1) { + usbi_err(ctx, "error checking for bulk continuation support"); + return LIBUSB_ERROR_OTHER; + } + } + + if (supports_flag_bulk_continuation) + usbi_dbg("bulk continuation flag supported"); + + if (-1 == supports_flag_zero_packet) { + /* zero length packet URB flag fixed since Linux 2.6.31 */ + supports_flag_zero_packet = kernel_version_ge(2,6,31); + if (-1 == supports_flag_zero_packet) { + usbi_err(ctx, "error checking for zero length packet support"); + return LIBUSB_ERROR_OTHER; + } + } + + if (supports_flag_zero_packet) + usbi_dbg("zero length packet flag supported"); + + if (-1 == sysfs_has_descriptors) { + /* sysfs descriptors has all descriptors since Linux 2.6.26 */ + sysfs_has_descriptors = kernel_version_ge(2,6,26); + if (-1 == sysfs_has_descriptors) { + usbi_err(ctx, "error checking for sysfs descriptors"); + return LIBUSB_ERROR_OTHER; + } + } + + if (-1 == sysfs_can_relate_devices) { + /* sysfs has busnum since Linux 2.6.22 */ + sysfs_can_relate_devices = kernel_version_ge(2,6,22); + if (-1 == sysfs_can_relate_devices) { + usbi_err(ctx, "error checking for sysfs busnum"); + return LIBUSB_ERROR_OTHER; + } + } + + if (sysfs_can_relate_devices || sysfs_has_descriptors) { + r = stat(SYSFS_DEVICE_PATH, &statbuf); + if (r != 0 || !S_ISDIR(statbuf.st_mode)) { + usbi_warn(ctx, "sysfs not mounted"); + sysfs_can_relate_devices = 0; + sysfs_has_descriptors = 0; + } + } + + if (sysfs_can_relate_devices) + usbi_dbg("sysfs can relate devices"); + + if (sysfs_has_descriptors) + usbi_dbg("sysfs has complete descriptors"); + + usbi_mutex_static_lock(&linux_hotplug_startstop_lock); + r = LIBUSB_SUCCESS; + if (init_count == 0) { + /* start up hotplug event handler */ + r = linux_start_event_monitor(); + } + if (r == LIBUSB_SUCCESS) { + r = linux_scan_devices(ctx); + if (r == LIBUSB_SUCCESS) + init_count++; + else if (init_count == 0) + linux_stop_event_monitor(); + } else + usbi_err(ctx, "error starting hotplug event monitor"); + usbi_mutex_static_unlock(&linux_hotplug_startstop_lock); + + return r; +} + +static void op_exit(void) +{ + usbi_mutex_static_lock(&linux_hotplug_startstop_lock); + assert(init_count != 0); + if (!--init_count) { + /* tear down event handler */ + (void)linux_stop_event_monitor(); + } + usbi_mutex_static_unlock(&linux_hotplug_startstop_lock); +} + +static int linux_start_event_monitor(void) +{ +#if defined(USE_UDEV) + return linux_udev_start_event_monitor(); +#else + return linux_netlink_start_event_monitor(); +#endif +} + +static int linux_stop_event_monitor(void) +{ +#if defined(USE_UDEV) + return linux_udev_stop_event_monitor(); +#else + return linux_netlink_stop_event_monitor(); +#endif +} + +static int linux_scan_devices(struct libusb_context *ctx) +{ + int ret; + + usbi_mutex_static_lock(&linux_hotplug_lock); + +#if defined(USE_UDEV) + ret = linux_udev_scan_devices(ctx); +#else + ret = linux_default_scan_devices(ctx); +#endif + + usbi_mutex_static_unlock(&linux_hotplug_lock); + + return ret; +} + +static void op_hotplug_poll(void) +{ +#if defined(USE_UDEV) + linux_udev_hotplug_poll(); +#else + linux_netlink_hotplug_poll(); +#endif +} + +static int _open_sysfs_attr(struct libusb_device *dev, const char *attr) +{ + struct linux_device_priv *priv = _device_priv(dev); + char filename[PATH_MAX]; + int fd; + + snprintf(filename, PATH_MAX, "%s/%s/%s", + SYSFS_DEVICE_PATH, priv->sysfs_dir, attr); + fd = open(filename, O_RDONLY); + if (fd < 0) { + usbi_err(DEVICE_CTX(dev), + "open %s failed ret=%d errno=%d", filename, fd, errno); + return LIBUSB_ERROR_IO; + } + + return fd; +} + +/* Note only suitable for attributes which always read >= 0, < 0 is error */ +static int __read_sysfs_attr(struct libusb_context *ctx, + const char *devname, const char *attr) +{ + char filename[PATH_MAX]; + FILE *f; + int r, value; + + snprintf(filename, PATH_MAX, "%s/%s/%s", SYSFS_DEVICE_PATH, + devname, attr); + f = fopen(filename, "r"); + if (f == NULL) { + if (errno == ENOENT) { + /* File doesn't exist. Assume the device has been + disconnected (see trac ticket #70). */ + return LIBUSB_ERROR_NO_DEVICE; + } + usbi_err(ctx, "open %s failed errno=%d", filename, errno); + return LIBUSB_ERROR_IO; + } + + r = fscanf(f, "%d", &value); + fclose(f); + if (r != 1) { + usbi_err(ctx, "fscanf %s returned %d, errno=%d", attr, r, errno); + return LIBUSB_ERROR_NO_DEVICE; /* For unplug race (trac #70) */ + } + if (value < 0) { + usbi_err(ctx, "%s contains a negative value", filename); + return LIBUSB_ERROR_IO; + } + + return value; +} + +static int op_get_device_descriptor(struct libusb_device *dev, + unsigned char *buffer, int *host_endian) +{ + struct linux_device_priv *priv = _device_priv(dev); + + *host_endian = sysfs_has_descriptors ? 0 : 1; + memcpy(buffer, priv->descriptors, DEVICE_DESC_LENGTH); + + return 0; +} + +/* read the bConfigurationValue for a device */ +static int sysfs_get_active_config(struct libusb_device *dev, int *config) +{ + char *endptr; + char tmp[5] = {0, 0, 0, 0, 0}; + long num; + int fd; + ssize_t r; + + fd = _open_sysfs_attr(dev, "bConfigurationValue"); + if (fd < 0) + return fd; + + r = read(fd, tmp, sizeof(tmp)); + close(fd); + if (r < 0) { + usbi_err(DEVICE_CTX(dev), + "read bConfigurationValue failed ret=%d errno=%d", r, errno); + return LIBUSB_ERROR_IO; + } else if (r == 0) { + usbi_dbg("device unconfigured"); + *config = -1; + return 0; + } + + if (tmp[sizeof(tmp) - 1] != 0) { + usbi_err(DEVICE_CTX(dev), "not null-terminated?"); + return LIBUSB_ERROR_IO; + } else if (tmp[0] == 0) { + usbi_err(DEVICE_CTX(dev), "no configuration value?"); + return LIBUSB_ERROR_IO; + } + + num = strtol(tmp, &endptr, 10); + if (endptr == tmp) { + usbi_err(DEVICE_CTX(dev), "error converting '%s' to integer", tmp); + return LIBUSB_ERROR_IO; + } + + *config = (int) num; + return 0; +} + +int linux_get_device_address (struct libusb_context *ctx, int detached, + uint8_t *busnum, uint8_t *devaddr,const char *dev_node, + const char *sys_name) +{ + int sysfs_attr; + + usbi_dbg("getting address for device: %s detached: %d", sys_name, detached); + /* can't use sysfs to read the bus and device number if the + * device has been detached */ + if (!sysfs_can_relate_devices || detached || NULL == sys_name) { + if (NULL == dev_node) { + return LIBUSB_ERROR_OTHER; + } + + /* will this work with all supported kernel versions? */ + if (!strncmp(dev_node, "/dev/bus/usb", 12)) { + sscanf (dev_node, "/dev/bus/usb/%hhu/%hhu", busnum, devaddr); + } else if (!strncmp(dev_node, "/proc/bus/usb", 13)) { + sscanf (dev_node, "/proc/bus/usb/%hhu/%hhu", busnum, devaddr); + } + + return LIBUSB_SUCCESS; + } + + usbi_dbg("scan %s", sys_name); + + sysfs_attr = __read_sysfs_attr(ctx, sys_name, "busnum"); + if (0 > sysfs_attr) + return sysfs_attr; + if (sysfs_attr > 255) + return LIBUSB_ERROR_INVALID_PARAM; + *busnum = (uint8_t) sysfs_attr; + + sysfs_attr = __read_sysfs_attr(ctx, sys_name, "devnum"); + if (0 > sysfs_attr) + return sysfs_attr; + if (sysfs_attr > 255) + return LIBUSB_ERROR_INVALID_PARAM; + + *devaddr = (uint8_t) sysfs_attr; + + usbi_dbg("bus=%d dev=%d", *busnum, *devaddr); + + return LIBUSB_SUCCESS; +} + +/* Return offset of the next descriptor with the given type */ +static int seek_to_next_descriptor(struct libusb_context *ctx, + uint8_t descriptor_type, unsigned char *buffer, int size) +{ + struct usb_descriptor_header header; + int i; + + for (i = 0; size >= 0; i += header.bLength, size -= header.bLength) { + if (size == 0) + return LIBUSB_ERROR_NOT_FOUND; + + if (size < 2) { + usbi_err(ctx, "short descriptor read %d/2", size); + return LIBUSB_ERROR_IO; + } + usbi_parse_descriptor(buffer + i, "bb", &header, 0); + + if (i && header.bDescriptorType == descriptor_type) + return i; + } + usbi_err(ctx, "bLength overflow by %d bytes", -size); + return LIBUSB_ERROR_IO; +} + +/* Return offset to next config */ +static int seek_to_next_config(struct libusb_context *ctx, + unsigned char *buffer, int size) +{ + struct libusb_config_descriptor config; + + if (size == 0) + return LIBUSB_ERROR_NOT_FOUND; + + if (size < LIBUSB_DT_CONFIG_SIZE) { + usbi_err(ctx, "short descriptor read %d/%d", + size, LIBUSB_DT_CONFIG_SIZE); + return LIBUSB_ERROR_IO; + } + + usbi_parse_descriptor(buffer, "bbwbbbbb", &config, 0); + if (config.bDescriptorType != LIBUSB_DT_CONFIG) { + usbi_err(ctx, "descriptor is not a config desc (type 0x%02x)", + config.bDescriptorType); + return LIBUSB_ERROR_IO; + } + + /* + * In usbfs the config descriptors are config.wTotalLength bytes apart, + * with any short reads from the device appearing as holes in the file. + * + * In sysfs wTotalLength is ignored, instead the kernel returns a + * config descriptor with verified bLength fields, with descriptors + * with an invalid bLength removed. + */ + if (sysfs_has_descriptors) { + int next = seek_to_next_descriptor(ctx, LIBUSB_DT_CONFIG, + buffer, size); + if (next == LIBUSB_ERROR_NOT_FOUND) + next = size; + if (next < 0) + return next; + + if (next != config.wTotalLength) + usbi_warn(ctx, "config length mismatch wTotalLength " + "%d real %d", config.wTotalLength, next); + return next; + } else { + if (config.wTotalLength < LIBUSB_DT_CONFIG_SIZE) { + usbi_err(ctx, "invalid wTotalLength %d", + config.wTotalLength); + return LIBUSB_ERROR_IO; + } else if (config.wTotalLength > size) { + usbi_warn(ctx, "short descriptor read %d/%d", + size, config.wTotalLength); + return size; + } else + return config.wTotalLength; + } +} + +static int op_get_config_descriptor_by_value(struct libusb_device *dev, + uint8_t value, unsigned char **buffer, int *host_endian) +{ + struct libusb_context *ctx = DEVICE_CTX(dev); + struct linux_device_priv *priv = _device_priv(dev); + unsigned char *descriptors = priv->descriptors; + int size = priv->descriptors_len; + struct libusb_config_descriptor *config; + + *buffer = NULL; + /* Unlike the device desc. config descs. are always in raw format */ + *host_endian = 0; + + /* Skip device header */ + descriptors += DEVICE_DESC_LENGTH; + size -= DEVICE_DESC_LENGTH; + + /* Seek till the config is found, or till "EOF" */ + while (1) { + int next = seek_to_next_config(ctx, descriptors, size); + if (next < 0) + return next; + config = (struct libusb_config_descriptor *)descriptors; + if (config->bConfigurationValue == value) { + *buffer = descriptors; + return next; + } + size -= next; + descriptors += next; + } +} + +static int op_get_active_config_descriptor(struct libusb_device *dev, + unsigned char *buffer, size_t len, int *host_endian) +{ + int r, config; + unsigned char *config_desc; + + if (sysfs_can_relate_devices) { + r = sysfs_get_active_config(dev, &config); + if (r < 0) + return r; + } else { + /* Use cached bConfigurationValue */ + struct linux_device_priv *priv = _device_priv(dev); + config = priv->active_config; + } + if (config == -1) + return LIBUSB_ERROR_NOT_FOUND; + + r = op_get_config_descriptor_by_value(dev, config, &config_desc, + host_endian); + if (r < 0) + return r; + + len = MIN(len, r); + memcpy(buffer, config_desc, len); + return len; +} + +static int op_get_config_descriptor(struct libusb_device *dev, + uint8_t config_index, unsigned char *buffer, size_t len, int *host_endian) +{ + struct linux_device_priv *priv = _device_priv(dev); + unsigned char *descriptors = priv->descriptors; + int i, r, size = priv->descriptors_len; + + /* Unlike the device desc. config descs. are always in raw format */ + *host_endian = 0; + + /* Skip device header */ + descriptors += DEVICE_DESC_LENGTH; + size -= DEVICE_DESC_LENGTH; + + /* Seek till the config is found, or till "EOF" */ + for (i = 0; ; i++) { + r = seek_to_next_config(DEVICE_CTX(dev), descriptors, size); + if (r < 0) + return r; + if (i == config_index) + break; + size -= r; + descriptors += r; + } + + len = MIN(len, r); + memcpy(buffer, descriptors, len); + return len; +} + +/* send a control message to retrieve active configuration */ +static int usbfs_get_active_config(struct libusb_device *dev, int fd) +{ + struct linux_device_priv *priv = _device_priv(dev); + unsigned char active_config = 0; + int r; + + struct usbfs_ctrltransfer ctrl = { + .bmRequestType = LIBUSB_ENDPOINT_IN, + .bRequest = LIBUSB_REQUEST_GET_CONFIGURATION, + .wValue = 0, + .wIndex = 0, + .wLength = 1, + .timeout = 1000, + .data = &active_config + }; + + r = ioctl(fd, IOCTL_USBFS_CONTROL, &ctrl); + if (r < 0) { + if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + /* we hit this error path frequently with buggy devices :( */ + usbi_warn(DEVICE_CTX(dev), + "get_configuration failed ret=%d errno=%d", r, errno); + priv->active_config = -1; + } else { + if (active_config > 0) { + priv->active_config = active_config; + } else { + /* some buggy devices have a configuration 0, but we're + * reaching into the corner of a corner case here, so let's + * not support buggy devices in these circumstances. + * stick to the specs: a configuration value of 0 means + * unconfigured. */ + usbi_warn(DEVICE_CTX(dev), + "active cfg 0? assuming unconfigured device"); + priv->active_config = -1; + } + } + + return LIBUSB_SUCCESS; +} + +static int initialize_device(struct libusb_device *dev, uint8_t busnum, + uint8_t devaddr, const char *sysfs_dir) +{ + struct linux_device_priv *priv = _device_priv(dev); + struct libusb_context *ctx = DEVICE_CTX(dev); + int descriptors_size = 512; /* Begin with a 1024 byte alloc */ + int fd, speed; + ssize_t r; + + dev->bus_number = busnum; + dev->device_address = devaddr; + + if (sysfs_dir) { + priv->sysfs_dir = strdup(sysfs_dir); + if (!priv->sysfs_dir) + return LIBUSB_ERROR_NO_MEM; + + /* Note speed can contain 1.5, in this case __read_sysfs_attr + will stop parsing at the '.' and return 1 */ + speed = __read_sysfs_attr(DEVICE_CTX(dev), sysfs_dir, "speed"); + if (speed >= 0) { + switch (speed) { + case 1: dev->speed = LIBUSB_SPEED_LOW; break; + case 12: dev->speed = LIBUSB_SPEED_FULL; break; + case 480: dev->speed = LIBUSB_SPEED_HIGH; break; + case 5000: dev->speed = LIBUSB_SPEED_SUPER; break; + default: + usbi_warn(DEVICE_CTX(dev), "Unknown device speed: %d Mbps", speed); + } + } + } + + /* cache descriptors in memory */ + if (sysfs_has_descriptors) + fd = _open_sysfs_attr(dev, "descriptors"); + else + fd = _get_usbfs_fd(dev, O_RDONLY, 0); + if (fd < 0) + return fd; + + do { + descriptors_size *= 2; + priv->descriptors = usbi_reallocf(priv->descriptors, + descriptors_size); + if (!priv->descriptors) { + close(fd); + return LIBUSB_ERROR_NO_MEM; + } + /* usbfs has holes in the file */ + if (!sysfs_has_descriptors) { + memset(priv->descriptors + priv->descriptors_len, + 0, descriptors_size - priv->descriptors_len); + } + r = read(fd, priv->descriptors + priv->descriptors_len, + descriptors_size - priv->descriptors_len); + if (r < 0) { + usbi_err(ctx, "read descriptor failed ret=%d errno=%d", + fd, errno); + close(fd); + return LIBUSB_ERROR_IO; + } + priv->descriptors_len += r; + } while (priv->descriptors_len == descriptors_size); + + close(fd); + + if (priv->descriptors_len < DEVICE_DESC_LENGTH) { + usbi_err(ctx, "short descriptor read (%d)", + priv->descriptors_len); + return LIBUSB_ERROR_IO; + } + + if (sysfs_can_relate_devices) + return LIBUSB_SUCCESS; + + /* cache active config */ + fd = _get_usbfs_fd(dev, O_RDWR, 1); + if (fd < 0) { + /* cannot send a control message to determine the active + * config. just assume the first one is active. */ + usbi_warn(ctx, "Missing rw usbfs access; cannot determine " + "active configuration descriptor"); + if (priv->descriptors_len >= + (DEVICE_DESC_LENGTH + LIBUSB_DT_CONFIG_SIZE)) { + struct libusb_config_descriptor config; + usbi_parse_descriptor( + priv->descriptors + DEVICE_DESC_LENGTH, + "bbwbbbbb", &config, 0); + priv->active_config = config.bConfigurationValue; + } else + priv->active_config = -1; /* No config dt */ + + return LIBUSB_SUCCESS; + } + + r = usbfs_get_active_config(dev, fd); + close(fd); + + return r; +} + +static int linux_get_parent_info(struct libusb_device *dev, const char *sysfs_dir) +{ + struct libusb_context *ctx = DEVICE_CTX(dev); + struct libusb_device *it; + char *parent_sysfs_dir, *tmp; + int ret, add_parent = 1; + + /* XXX -- can we figure out the topology when using usbfs? */ + if (NULL == sysfs_dir || 0 == strncmp(sysfs_dir, "usb", 3)) { + /* either using usbfs or finding the parent of a root hub */ + return LIBUSB_SUCCESS; + } + + parent_sysfs_dir = strdup(sysfs_dir); + if (NULL == parent_sysfs_dir) { + return LIBUSB_ERROR_NO_MEM; + } + if (NULL != (tmp = strrchr(parent_sysfs_dir, '.')) || + NULL != (tmp = strrchr(parent_sysfs_dir, '-'))) { + dev->port_number = atoi(tmp + 1); + *tmp = '\0'; + } else { + usbi_warn(ctx, "Can not parse sysfs_dir: %s, no parent info", + parent_sysfs_dir); + free (parent_sysfs_dir); + return LIBUSB_SUCCESS; + } + + /* is the parent a root hub? */ + if (NULL == strchr(parent_sysfs_dir, '-')) { + tmp = parent_sysfs_dir; + ret = asprintf (&parent_sysfs_dir, "usb%s", tmp); + free (tmp); + if (0 > ret) { + return LIBUSB_ERROR_NO_MEM; + } + } + +retry: + /* find the parent in the context */ + usbi_mutex_lock(&ctx->usb_devs_lock); + list_for_each_entry(it, &ctx->usb_devs, list, struct libusb_device) { + struct linux_device_priv *priv = _device_priv(it); + if (priv->sysfs_dir) { + if (0 == strcmp (priv->sysfs_dir, parent_sysfs_dir)) { + dev->parent_dev = libusb_ref_device(it); + break; + } + } + } + usbi_mutex_unlock(&ctx->usb_devs_lock); + + if (!dev->parent_dev && add_parent) { + usbi_dbg("parent_dev %s not enumerated yet, enumerating now", + parent_sysfs_dir); + sysfs_scan_device(ctx, parent_sysfs_dir); + add_parent = 0; + goto retry; + } + + usbi_dbg("Dev %p (%s) has parent %p (%s) port %d", dev, sysfs_dir, + dev->parent_dev, parent_sysfs_dir, dev->port_number); + + free (parent_sysfs_dir); + + return LIBUSB_SUCCESS; +} + +int linux_enumerate_device(struct libusb_context *ctx, + uint8_t busnum, uint8_t devaddr, const char *sysfs_dir) +{ + unsigned long session_id; + struct libusb_device *dev; + int r = 0; + + /* FIXME: session ID is not guaranteed unique as addresses can wrap and + * will be reused. instead we should add a simple sysfs attribute with + * a session ID. */ + session_id = busnum << 8 | devaddr; + usbi_dbg("busnum %d devaddr %d session_id %ld", busnum, devaddr, + session_id); + + dev = usbi_get_device_by_session_id(ctx, session_id); + if (dev) { + /* device already exists in the context */ + usbi_dbg("session_id %ld already exists", session_id); + libusb_unref_device(dev); + return LIBUSB_SUCCESS; + } + + usbi_dbg("allocating new device for %d/%d (session %ld)", + busnum, devaddr, session_id); + dev = usbi_alloc_device(ctx, session_id); + if (!dev) + return LIBUSB_ERROR_NO_MEM; + + r = initialize_device(dev, busnum, devaddr, sysfs_dir); + if (r < 0) + goto out; + r = usbi_sanitize_device(dev); + if (r < 0) + goto out; + + r = linux_get_parent_info(dev, sysfs_dir); + if (r < 0) + goto out; +out: + if (r < 0) + libusb_unref_device(dev); + else + usbi_connect_device(dev); + + return r; +} + +void linux_hotplug_enumerate(uint8_t busnum, uint8_t devaddr, const char *sys_name) +{ + struct libusb_context *ctx; + + usbi_mutex_static_lock(&active_contexts_lock); + list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) { + linux_enumerate_device(ctx, busnum, devaddr, sys_name); + } + usbi_mutex_static_unlock(&active_contexts_lock); +} + +void linux_device_disconnected(uint8_t busnum, uint8_t devaddr) +{ + struct libusb_context *ctx; + struct libusb_device *dev; + unsigned long session_id = busnum << 8 | devaddr; + + usbi_mutex_static_lock(&active_contexts_lock); + list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) { + dev = usbi_get_device_by_session_id (ctx, session_id); + if (NULL != dev) { + usbi_disconnect_device (dev); + libusb_unref_device(dev); + } else { + usbi_dbg("device not found for session %x", session_id); + } + } + usbi_mutex_static_unlock(&active_contexts_lock); +} + +#if !defined(USE_UDEV) +/* open a bus directory and adds all discovered devices to the context */ +static int usbfs_scan_busdir(struct libusb_context *ctx, uint8_t busnum) +{ + DIR *dir; + char dirpath[PATH_MAX]; + struct dirent *entry; + int r = LIBUSB_ERROR_IO; + + snprintf(dirpath, PATH_MAX, "%s/%03d", usbfs_path, busnum); + usbi_dbg("%s", dirpath); + dir = opendir(dirpath); + if (!dir) { + usbi_err(ctx, "opendir '%s' failed, errno=%d", dirpath, errno); + /* FIXME: should handle valid race conditions like hub unplugged + * during directory iteration - this is not an error */ + return r; + } + + while ((entry = readdir(dir))) { + int devaddr; + + if (entry->d_name[0] == '.') + continue; + + devaddr = atoi(entry->d_name); + if (devaddr == 0) { + usbi_dbg("unknown dir entry %s", entry->d_name); + continue; + } + + if (linux_enumerate_device(ctx, busnum, (uint8_t) devaddr, NULL)) { + usbi_dbg("failed to enumerate dir entry %s", entry->d_name); + continue; + } + + r = 0; + } + + closedir(dir); + return r; +} + +static int usbfs_get_device_list(struct libusb_context *ctx) +{ + struct dirent *entry; + DIR *buses = opendir(usbfs_path); + int r = 0; + + if (!buses) { + usbi_err(ctx, "opendir buses failed errno=%d", errno); + return LIBUSB_ERROR_IO; + } + + while ((entry = readdir(buses))) { + int busnum; + + if (entry->d_name[0] == '.') + continue; + + if (usbdev_names) { + int devaddr; + if (!_is_usbdev_entry(entry, &busnum, &devaddr)) + continue; + + r = linux_enumerate_device(ctx, busnum, (uint8_t) devaddr, NULL); + if (r < 0) { + usbi_dbg("failed to enumerate dir entry %s", entry->d_name); + continue; + } + } else { + busnum = atoi(entry->d_name); + if (busnum == 0) { + usbi_dbg("unknown dir entry %s", entry->d_name); + continue; + } + + r = usbfs_scan_busdir(ctx, busnum); + if (r < 0) + break; + } + } + + closedir(buses); + return r; + +} +#endif + +static int sysfs_scan_device(struct libusb_context *ctx, const char *devname) +{ + uint8_t busnum, devaddr; + int ret; + + ret = linux_get_device_address (ctx, 0, &busnum, &devaddr, NULL, devname); + if (LIBUSB_SUCCESS != ret) { + return ret; + } + + return linux_enumerate_device(ctx, busnum & 0xff, devaddr & 0xff, + devname); +} + +#if !defined(USE_UDEV) +static int sysfs_get_device_list(struct libusb_context *ctx) +{ + DIR *devices = opendir(SYSFS_DEVICE_PATH); + struct dirent *entry; + int r = LIBUSB_ERROR_IO; + + if (!devices) { + usbi_err(ctx, "opendir devices failed errno=%d", errno); + return r; + } + + while ((entry = readdir(devices))) { + if ((!isdigit(entry->d_name[0]) && strncmp(entry->d_name, "usb", 3)) + || strchr(entry->d_name, ':')) + continue; + + if (sysfs_scan_device(ctx, entry->d_name)) { + usbi_dbg("failed to enumerate dir entry %s", entry->d_name); + continue; + } + + r = 0; + } + + closedir(devices); + return r; +} + +static int linux_default_scan_devices (struct libusb_context *ctx) +{ + /* we can retrieve device list and descriptors from sysfs or usbfs. + * sysfs is preferable, because if we use usbfs we end up resuming + * any autosuspended USB devices. however, sysfs is not available + * everywhere, so we need a usbfs fallback too. + * + * as described in the "sysfs vs usbfs" comment at the top of this + * file, sometimes we have sysfs but not enough information to + * relate sysfs devices to usbfs nodes. op_init() determines the + * adequacy of sysfs and sets sysfs_can_relate_devices. + */ + if (sysfs_can_relate_devices != 0) + return sysfs_get_device_list(ctx); + else + return usbfs_get_device_list(ctx); +} +#endif + +static int op_open(struct libusb_device_handle *handle) +{ + struct linux_device_handle_priv *hpriv = _device_handle_priv(handle); + int r; + + hpriv->fd = _get_usbfs_fd(handle->dev, O_RDWR, 0); + if (hpriv->fd < 0) { + if (hpriv->fd == LIBUSB_ERROR_NO_DEVICE) { + /* device will still be marked as attached if hotplug monitor thread + * hasn't processed remove event yet */ + usbi_mutex_static_lock(&linux_hotplug_lock); + if (handle->dev->attached) { + usbi_dbg("open failed with no device, but device still attached"); + linux_device_disconnected(handle->dev->bus_number, + handle->dev->device_address); + } + usbi_mutex_static_unlock(&linux_hotplug_lock); + } + return hpriv->fd; + } + + r = ioctl(hpriv->fd, IOCTL_USBFS_GET_CAPABILITIES, &hpriv->caps); + if (r < 0) { + if (errno == ENOTTY) + usbi_dbg("getcap not available"); + else + usbi_err(HANDLE_CTX(handle), "getcap failed (%d)", errno); + hpriv->caps = 0; + if (supports_flag_zero_packet) + hpriv->caps |= USBFS_CAP_ZERO_PACKET; + if (supports_flag_bulk_continuation) + hpriv->caps |= USBFS_CAP_BULK_CONTINUATION; + } + + r = usbi_add_pollfd(HANDLE_CTX(handle), hpriv->fd, POLLOUT); + if (r < 0) + close(hpriv->fd); + + return r; +} + +static void op_close(struct libusb_device_handle *dev_handle) +{ + struct linux_device_handle_priv *hpriv = _device_handle_priv(dev_handle); + /* fd may have already been removed by POLLERR condition in op_handle_events() */ + if (!hpriv->fd_removed) + usbi_remove_pollfd(HANDLE_CTX(dev_handle), hpriv->fd); + close(hpriv->fd); +} + +static int op_get_configuration(struct libusb_device_handle *handle, + int *config) +{ + int r; + + if (sysfs_can_relate_devices) { + r = sysfs_get_active_config(handle->dev, config); + } else { + r = usbfs_get_active_config(handle->dev, + _device_handle_priv(handle)->fd); + if (r == LIBUSB_SUCCESS) + *config = _device_priv(handle->dev)->active_config; + } + if (r < 0) + return r; + + if (*config == -1) { + usbi_err(HANDLE_CTX(handle), "device unconfigured"); + *config = 0; + } + + return 0; +} + +static int op_set_configuration(struct libusb_device_handle *handle, int config) +{ + struct linux_device_priv *priv = _device_priv(handle->dev); + int fd = _device_handle_priv(handle)->fd; + int r = ioctl(fd, IOCTL_USBFS_SETCONFIG, &config); + if (r) { + if (errno == EINVAL) + return LIBUSB_ERROR_NOT_FOUND; + else if (errno == EBUSY) + return LIBUSB_ERROR_BUSY; + else if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_err(HANDLE_CTX(handle), "failed, error %d errno %d", r, errno); + return LIBUSB_ERROR_OTHER; + } + + /* update our cached active config descriptor */ + priv->active_config = config; + + return LIBUSB_SUCCESS; +} + +static int claim_interface(struct libusb_device_handle *handle, int iface) +{ + int fd = _device_handle_priv(handle)->fd; + int r = ioctl(fd, IOCTL_USBFS_CLAIMINTF, &iface); + if (r) { + if (errno == ENOENT) + return LIBUSB_ERROR_NOT_FOUND; + else if (errno == EBUSY) + return LIBUSB_ERROR_BUSY; + else if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_err(HANDLE_CTX(handle), + "claim interface failed, error %d errno %d", r, errno); + return LIBUSB_ERROR_OTHER; + } + return 0; +} + +static int release_interface(struct libusb_device_handle *handle, int iface) +{ + int fd = _device_handle_priv(handle)->fd; + int r = ioctl(fd, IOCTL_USBFS_RELEASEINTF, &iface); + if (r) { + if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_err(HANDLE_CTX(handle), + "release interface failed, error %d errno %d", r, errno); + return LIBUSB_ERROR_OTHER; + } + return 0; +} + +static int op_set_interface(struct libusb_device_handle *handle, int iface, + int altsetting) +{ + int fd = _device_handle_priv(handle)->fd; + struct usbfs_setinterface setintf; + int r; + + setintf.interface = iface; + setintf.altsetting = altsetting; + r = ioctl(fd, IOCTL_USBFS_SETINTF, &setintf); + if (r) { + if (errno == EINVAL) + return LIBUSB_ERROR_NOT_FOUND; + else if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_err(HANDLE_CTX(handle), + "setintf failed error %d errno %d", r, errno); + return LIBUSB_ERROR_OTHER; + } + + return 0; +} + +static int op_clear_halt(struct libusb_device_handle *handle, + unsigned char endpoint) +{ + int fd = _device_handle_priv(handle)->fd; + unsigned int _endpoint = endpoint; + int r = ioctl(fd, IOCTL_USBFS_CLEAR_HALT, &_endpoint); + if (r) { + if (errno == ENOENT) + return LIBUSB_ERROR_NOT_FOUND; + else if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_err(HANDLE_CTX(handle), + "clear_halt failed error %d errno %d", r, errno); + return LIBUSB_ERROR_OTHER; + } + + return 0; +} + +static int op_reset_device(struct libusb_device_handle *handle) +{ + int fd = _device_handle_priv(handle)->fd; + int i, r, ret = 0; + + /* Doing a device reset will cause the usbfs driver to get unbound + from any interfaces it is bound to. By voluntarily unbinding + the usbfs driver ourself, we stop the kernel from rebinding + the interface after reset (which would end up with the interface + getting bound to the in kernel driver if any). */ + for (i = 0; i < USB_MAXINTERFACES; i++) { + if (handle->claimed_interfaces & (1L << i)) { + release_interface(handle, i); + } + } + + usbi_mutex_lock(&handle->lock); + r = ioctl(fd, IOCTL_USBFS_RESET, NULL); + if (r) { + if (errno == ENODEV) { + ret = LIBUSB_ERROR_NOT_FOUND; + goto out; + } + + usbi_err(HANDLE_CTX(handle), + "reset failed error %d errno %d", r, errno); + ret = LIBUSB_ERROR_OTHER; + goto out; + } + + /* And re-claim any interfaces which were claimed before the reset */ + for (i = 0; i < USB_MAXINTERFACES; i++) { + if (handle->claimed_interfaces & (1L << i)) { + /* + * A driver may have completed modprobing during + * IOCTL_USBFS_RESET, and bound itself as soon as + * IOCTL_USBFS_RESET released the device lock + */ + r = detach_kernel_driver_and_claim(handle, i); + if (r) { + usbi_warn(HANDLE_CTX(handle), + "failed to re-claim interface %d after reset: %s", + i, libusb_error_name(r)); + handle->claimed_interfaces &= ~(1L << i); + ret = LIBUSB_ERROR_NOT_FOUND; + } + } + } +out: + usbi_mutex_unlock(&handle->lock); + return ret; +} + +static int do_streams_ioctl(struct libusb_device_handle *handle, long req, + uint32_t num_streams, unsigned char *endpoints, int num_endpoints) +{ + int r, fd = _device_handle_priv(handle)->fd; + struct usbfs_streams *streams; + + if (num_endpoints > 30) /* Max 15 in + 15 out eps */ + return LIBUSB_ERROR_INVALID_PARAM; + + streams = malloc(sizeof(struct usbfs_streams) + num_endpoints); + if (!streams) + return LIBUSB_ERROR_NO_MEM; + + streams->num_streams = num_streams; + streams->num_eps = num_endpoints; + memcpy(streams->eps, endpoints, num_endpoints); + + r = ioctl(fd, req, streams); + + free(streams); + + if (r < 0) { + if (errno == ENOTTY) + return LIBUSB_ERROR_NOT_SUPPORTED; + else if (errno == EINVAL) + return LIBUSB_ERROR_INVALID_PARAM; + else if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_err(HANDLE_CTX(handle), + "streams-ioctl failed error %d errno %d", r, errno); + return LIBUSB_ERROR_OTHER; + } + return r; +} + +static int op_alloc_streams(struct libusb_device_handle *handle, + uint32_t num_streams, unsigned char *endpoints, int num_endpoints) +{ + return do_streams_ioctl(handle, IOCTL_USBFS_ALLOC_STREAMS, + num_streams, endpoints, num_endpoints); +} + +static int op_free_streams(struct libusb_device_handle *handle, + unsigned char *endpoints, int num_endpoints) +{ + return do_streams_ioctl(handle, IOCTL_USBFS_FREE_STREAMS, 0, + endpoints, num_endpoints); +} + +static unsigned char *op_dev_mem_alloc(struct libusb_device_handle *handle, + size_t len) +{ + struct linux_device_handle_priv *hpriv = _device_handle_priv(handle); + unsigned char *buffer = (unsigned char *)mmap(NULL, len, + PROT_READ | PROT_WRITE, MAP_SHARED, hpriv->fd, 0); + if (buffer == MAP_FAILED) { + usbi_err(HANDLE_CTX(handle), "alloc dev mem failed errno %d", + errno); + return NULL; + } + return buffer; +} + +static int op_dev_mem_free(struct libusb_device_handle *handle, + unsigned char *buffer, size_t len) +{ + if (munmap(buffer, len) != 0) { + usbi_err(HANDLE_CTX(handle), "free dev mem failed errno %d", + errno); + return LIBUSB_ERROR_OTHER; + } else { + return LIBUSB_SUCCESS; + } +} + +static int op_kernel_driver_active(struct libusb_device_handle *handle, + int interface) +{ + int fd = _device_handle_priv(handle)->fd; + struct usbfs_getdriver getdrv; + int r; + + getdrv.interface = interface; + r = ioctl(fd, IOCTL_USBFS_GETDRIVER, &getdrv); + if (r) { + if (errno == ENODATA) + return 0; + else if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_err(HANDLE_CTX(handle), + "get driver failed error %d errno %d", r, errno); + return LIBUSB_ERROR_OTHER; + } + + return (strcmp(getdrv.driver, "usbfs") == 0) ? 0 : 1; +} + +static int op_detach_kernel_driver(struct libusb_device_handle *handle, + int interface) +{ + int fd = _device_handle_priv(handle)->fd; + struct usbfs_ioctl command; + struct usbfs_getdriver getdrv; + int r; + + command.ifno = interface; + command.ioctl_code = IOCTL_USBFS_DISCONNECT; + command.data = NULL; + + getdrv.interface = interface; + r = ioctl(fd, IOCTL_USBFS_GETDRIVER, &getdrv); + if (r == 0 && strcmp(getdrv.driver, "usbfs") == 0) + return LIBUSB_ERROR_NOT_FOUND; + + r = ioctl(fd, IOCTL_USBFS_IOCTL, &command); + if (r) { + if (errno == ENODATA) + return LIBUSB_ERROR_NOT_FOUND; + else if (errno == EINVAL) + return LIBUSB_ERROR_INVALID_PARAM; + else if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_err(HANDLE_CTX(handle), + "detach failed error %d errno %d", r, errno); + return LIBUSB_ERROR_OTHER; + } + + return 0; +} + +static int op_attach_kernel_driver(struct libusb_device_handle *handle, + int interface) +{ + int fd = _device_handle_priv(handle)->fd; + struct usbfs_ioctl command; + int r; + + command.ifno = interface; + command.ioctl_code = IOCTL_USBFS_CONNECT; + command.data = NULL; + + r = ioctl(fd, IOCTL_USBFS_IOCTL, &command); + if (r < 0) { + if (errno == ENODATA) + return LIBUSB_ERROR_NOT_FOUND; + else if (errno == EINVAL) + return LIBUSB_ERROR_INVALID_PARAM; + else if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + else if (errno == EBUSY) + return LIBUSB_ERROR_BUSY; + + usbi_err(HANDLE_CTX(handle), + "attach failed error %d errno %d", r, errno); + return LIBUSB_ERROR_OTHER; + } else if (r == 0) { + return LIBUSB_ERROR_NOT_FOUND; + } + + return 0; +} + +static int detach_kernel_driver_and_claim(struct libusb_device_handle *handle, + int interface) +{ + struct usbfs_disconnect_claim dc; + int r, fd = _device_handle_priv(handle)->fd; + + dc.interface = interface; + strcpy(dc.driver, "usbfs"); + dc.flags = USBFS_DISCONNECT_CLAIM_EXCEPT_DRIVER; + r = ioctl(fd, IOCTL_USBFS_DISCONNECT_CLAIM, &dc); + if (r == 0 || (r != 0 && errno != ENOTTY)) { + if (r == 0) + return 0; + + switch (errno) { + case EBUSY: + return LIBUSB_ERROR_BUSY; + case EINVAL: + return LIBUSB_ERROR_INVALID_PARAM; + case ENODEV: + return LIBUSB_ERROR_NO_DEVICE; + } + usbi_err(HANDLE_CTX(handle), + "disconnect-and-claim failed errno %d", errno); + return LIBUSB_ERROR_OTHER; + } + + /* Fallback code for kernels which don't support the + disconnect-and-claim ioctl */ + r = op_detach_kernel_driver(handle, interface); + if (r != 0 && r != LIBUSB_ERROR_NOT_FOUND) + return r; + + return claim_interface(handle, interface); +} + +static int op_claim_interface(struct libusb_device_handle *handle, int iface) +{ + if (handle->auto_detach_kernel_driver) + return detach_kernel_driver_and_claim(handle, iface); + else + return claim_interface(handle, iface); +} + +static int op_release_interface(struct libusb_device_handle *handle, int iface) +{ + int r; + + r = release_interface(handle, iface); + if (r) + return r; + + if (handle->auto_detach_kernel_driver) + op_attach_kernel_driver(handle, iface); + + return 0; +} + +static void op_destroy_device(struct libusb_device *dev) +{ + struct linux_device_priv *priv = _device_priv(dev); + if (priv->descriptors) + free(priv->descriptors); + if (priv->sysfs_dir) + free(priv->sysfs_dir); +} + +/* URBs are discarded in reverse order of submission to avoid races. */ +static int discard_urbs(struct usbi_transfer *itransfer, int first, int last_plus_one) +{ + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct linux_transfer_priv *tpriv = + usbi_transfer_get_os_priv(itransfer); + struct linux_device_handle_priv *dpriv = + _device_handle_priv(transfer->dev_handle); + int i, ret = 0; + struct usbfs_urb *urb; + + for (i = last_plus_one - 1; i >= first; i--) { + if (LIBUSB_TRANSFER_TYPE_ISOCHRONOUS == transfer->type) + urb = tpriv->iso_urbs[i]; + else + urb = &tpriv->urbs[i]; + + if (0 == ioctl(dpriv->fd, IOCTL_USBFS_DISCARDURB, urb)) + continue; + + if (EINVAL == errno) { + usbi_dbg("URB not found --> assuming ready to be reaped"); + if (i == (last_plus_one - 1)) + ret = LIBUSB_ERROR_NOT_FOUND; + } else if (ENODEV == errno) { + usbi_dbg("Device not found for URB --> assuming ready to be reaped"); + ret = LIBUSB_ERROR_NO_DEVICE; + } else { + usbi_warn(TRANSFER_CTX(transfer), + "unrecognised discard errno %d", errno); + ret = LIBUSB_ERROR_OTHER; + } + } + return ret; +} + +static void free_iso_urbs(struct linux_transfer_priv *tpriv) +{ + int i; + for (i = 0; i < tpriv->num_urbs; i++) { + struct usbfs_urb *urb = tpriv->iso_urbs[i]; + if (!urb) + break; + free(urb); + } + + free(tpriv->iso_urbs); + tpriv->iso_urbs = NULL; +} + +static int submit_bulk_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + struct linux_device_handle_priv *dpriv = + _device_handle_priv(transfer->dev_handle); + struct usbfs_urb *urbs; + int is_out = (transfer->endpoint & LIBUSB_ENDPOINT_DIR_MASK) + == LIBUSB_ENDPOINT_OUT; + int bulk_buffer_len, use_bulk_continuation; + int r; + int i; + + if (is_out && (transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) && + !(dpriv->caps & USBFS_CAP_ZERO_PACKET)) + return LIBUSB_ERROR_NOT_SUPPORTED; + + /* + * Older versions of usbfs place a 16kb limit on bulk URBs. We work + * around this by splitting large transfers into 16k blocks, and then + * submit all urbs at once. it would be simpler to submit one urb at + * a time, but there is a big performance gain doing it this way. + * + * Newer versions lift the 16k limit (USBFS_CAP_NO_PACKET_SIZE_LIM), + * using arbritary large transfers can still be a bad idea though, as + * the kernel needs to allocate physical contiguous memory for this, + * which may fail for large buffers. + * + * The kernel solves this problem by splitting the transfer into + * blocks itself when the host-controller is scatter-gather capable + * (USBFS_CAP_BULK_SCATTER_GATHER), which most controllers are. + * + * Last, there is the issue of short-transfers when splitting, for + * short split-transfers to work reliable USBFS_CAP_BULK_CONTINUATION + * is needed, but this is not always available. + */ + if (dpriv->caps & USBFS_CAP_BULK_SCATTER_GATHER) { + /* Good! Just submit everything in one go */ + bulk_buffer_len = transfer->length ? transfer->length : 1; + use_bulk_continuation = 0; + } else if (dpriv->caps & USBFS_CAP_BULK_CONTINUATION) { + /* Split the transfers and use bulk-continuation to + avoid issues with short-transfers */ + bulk_buffer_len = MAX_BULK_BUFFER_LENGTH; + use_bulk_continuation = 1; + } else if (dpriv->caps & USBFS_CAP_NO_PACKET_SIZE_LIM) { + /* Don't split, assume the kernel can alloc the buffer + (otherwise the submit will fail with -ENOMEM) */ + bulk_buffer_len = transfer->length ? transfer->length : 1; + use_bulk_continuation = 0; + } else { + /* Bad, splitting without bulk-continuation, short transfers + which end before the last urb will not work reliable! */ + /* Note we don't warn here as this is "normal" on kernels < + 2.6.32 and not a problem for most applications */ + bulk_buffer_len = MAX_BULK_BUFFER_LENGTH; + use_bulk_continuation = 0; + } + + int num_urbs = transfer->length / bulk_buffer_len; + int last_urb_partial = 0; + + if (transfer->length == 0) { + num_urbs = 1; + } else if ((transfer->length % bulk_buffer_len) > 0) { + last_urb_partial = 1; + num_urbs++; + } + usbi_dbg("need %d urbs for new transfer with length %d", num_urbs, + transfer->length); + urbs = calloc(num_urbs, sizeof(struct usbfs_urb)); + if (!urbs) + return LIBUSB_ERROR_NO_MEM; + tpriv->urbs = urbs; + tpriv->num_urbs = num_urbs; + tpriv->num_retired = 0; + tpriv->reap_action = NORMAL; + tpriv->reap_status = LIBUSB_TRANSFER_COMPLETED; + + for (i = 0; i < num_urbs; i++) { + struct usbfs_urb *urb = &urbs[i]; + urb->usercontext = itransfer; + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_BULK: + urb->type = USBFS_URB_TYPE_BULK; + urb->stream_id = 0; + break; + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + urb->type = USBFS_URB_TYPE_BULK; + urb->stream_id = itransfer->stream_id; + break; + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + urb->type = USBFS_URB_TYPE_INTERRUPT; + break; + } + urb->endpoint = transfer->endpoint; + urb->buffer = transfer->buffer + (i * bulk_buffer_len); + /* don't set the short not ok flag for the last URB */ + if (use_bulk_continuation && !is_out && (i < num_urbs - 1)) + urb->flags = USBFS_URB_SHORT_NOT_OK; + if (i == num_urbs - 1 && last_urb_partial) + urb->buffer_length = transfer->length % bulk_buffer_len; + else if (transfer->length == 0) + urb->buffer_length = 0; + else + urb->buffer_length = bulk_buffer_len; + + if (i > 0 && use_bulk_continuation) + urb->flags |= USBFS_URB_BULK_CONTINUATION; + + /* we have already checked that the flag is supported */ + if (is_out && i == num_urbs - 1 && + transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) + urb->flags |= USBFS_URB_ZERO_PACKET; + + r = ioctl(dpriv->fd, IOCTL_USBFS_SUBMITURB, urb); + if (r < 0) { + if (errno == ENODEV) { + r = LIBUSB_ERROR_NO_DEVICE; + } else { + usbi_err(TRANSFER_CTX(transfer), + "submiturb failed error %d errno=%d", r, errno); + r = LIBUSB_ERROR_IO; + } + + /* if the first URB submission fails, we can simply free up and + * return failure immediately. */ + if (i == 0) { + usbi_dbg("first URB failed, easy peasy"); + free(urbs); + tpriv->urbs = NULL; + return r; + } + + /* if it's not the first URB that failed, the situation is a bit + * tricky. we may need to discard all previous URBs. there are + * complications: + * - discarding is asynchronous - discarded urbs will be reaped + * later. the user must not have freed the transfer when the + * discarded URBs are reaped, otherwise libusb will be using + * freed memory. + * - the earlier URBs may have completed successfully and we do + * not want to throw away any data. + * - this URB failing may be no error; EREMOTEIO means that + * this transfer simply didn't need all the URBs we submitted + * so, we report that the transfer was submitted successfully and + * in case of error we discard all previous URBs. later when + * the final reap completes we can report error to the user, + * or success if an earlier URB was completed successfully. + */ + tpriv->reap_action = EREMOTEIO == errno ? COMPLETED_EARLY : SUBMIT_FAILED; + + /* The URBs we haven't submitted yet we count as already + * retired. */ + tpriv->num_retired += num_urbs - i; + + /* If we completed short then don't try to discard. */ + if (COMPLETED_EARLY == tpriv->reap_action) + return 0; + + discard_urbs(itransfer, 0, i); + + usbi_dbg("reporting successful submission but waiting for %d " + "discards before reporting error", i); + return 0; + } + } + + return 0; +} + +static int submit_iso_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + struct linux_device_handle_priv *dpriv = + _device_handle_priv(transfer->dev_handle); + struct usbfs_urb **urbs; + size_t alloc_size; + int num_packets = transfer->num_iso_packets; + int i; + int this_urb_len = 0; + int num_urbs = 1; + int packet_offset = 0; + unsigned int packet_len; + unsigned char *urb_buffer = transfer->buffer; + + /* usbfs places arbitrary limits on iso URBs. this limit has changed + * at least three times, and it's difficult to accurately detect which + * limit this running kernel might impose. so we attempt to submit + * whatever the user has provided. if the kernel rejects the request + * due to its size, we return an error indicating such to the user. + */ + + /* calculate how many URBs we need */ + for (i = 0; i < num_packets; i++) { + unsigned int space_remaining = MAX_ISO_BUFFER_LENGTH - this_urb_len; + packet_len = transfer->iso_packet_desc[i].length; + + if (packet_len > space_remaining) { + num_urbs++; + this_urb_len = packet_len; + /* check that we can actually support this packet length */ + if (this_urb_len > MAX_ISO_BUFFER_LENGTH) + return LIBUSB_ERROR_INVALID_PARAM; + } else { + this_urb_len += packet_len; + } + } + usbi_dbg("need %d %dk URBs for transfer", num_urbs, MAX_ISO_BUFFER_LENGTH / 1024); + + urbs = calloc(num_urbs, sizeof(*urbs)); + if (!urbs) + return LIBUSB_ERROR_NO_MEM; + + tpriv->iso_urbs = urbs; + tpriv->num_urbs = num_urbs; + tpriv->num_retired = 0; + tpriv->reap_action = NORMAL; + tpriv->iso_packet_offset = 0; + + /* allocate + initialize each URB with the correct number of packets */ + for (i = 0; i < num_urbs; i++) { + struct usbfs_urb *urb; + unsigned int space_remaining_in_urb = MAX_ISO_BUFFER_LENGTH; + int urb_packet_offset = 0; + unsigned char *urb_buffer_orig = urb_buffer; + int j; + int k; + + /* swallow up all the packets we can fit into this URB */ + while (packet_offset < transfer->num_iso_packets) { + packet_len = transfer->iso_packet_desc[packet_offset].length; + if (packet_len <= space_remaining_in_urb) { + /* throw it in */ + urb_packet_offset++; + packet_offset++; + space_remaining_in_urb -= packet_len; + urb_buffer += packet_len; + } else { + /* it can't fit, save it for the next URB */ + break; + } + } + + alloc_size = sizeof(*urb) + + (urb_packet_offset * sizeof(struct usbfs_iso_packet_desc)); + urb = calloc(1, alloc_size); + if (!urb) { + free_iso_urbs(tpriv); + return LIBUSB_ERROR_NO_MEM; + } + urbs[i] = urb; + + /* populate packet lengths */ + for (j = 0, k = packet_offset - urb_packet_offset; + k < packet_offset; k++, j++) { + packet_len = transfer->iso_packet_desc[k].length; + urb->iso_frame_desc[j].length = packet_len; + } + + urb->usercontext = itransfer; + urb->type = USBFS_URB_TYPE_ISO; + /* FIXME: interface for non-ASAP data? */ + urb->flags = USBFS_URB_ISO_ASAP; + urb->endpoint = transfer->endpoint; + urb->number_of_packets = urb_packet_offset; + urb->buffer = urb_buffer_orig; + } + + /* submit URBs */ + for (i = 0; i < num_urbs; i++) { + int r = ioctl(dpriv->fd, IOCTL_USBFS_SUBMITURB, urbs[i]); + if (r < 0) { + if (errno == ENODEV) { + r = LIBUSB_ERROR_NO_DEVICE; + } else if (errno == EINVAL) { + usbi_warn(TRANSFER_CTX(transfer), + "submiturb failed, transfer too large"); + r = LIBUSB_ERROR_INVALID_PARAM; + } else { + usbi_err(TRANSFER_CTX(transfer), + "submiturb failed error %d errno=%d", r, errno); + r = LIBUSB_ERROR_IO; + } + + /* if the first URB submission fails, we can simply free up and + * return failure immediately. */ + if (i == 0) { + usbi_dbg("first URB failed, easy peasy"); + free_iso_urbs(tpriv); + return r; + } + + /* if it's not the first URB that failed, the situation is a bit + * tricky. we must discard all previous URBs. there are + * complications: + * - discarding is asynchronous - discarded urbs will be reaped + * later. the user must not have freed the transfer when the + * discarded URBs are reaped, otherwise libusb will be using + * freed memory. + * - the earlier URBs may have completed successfully and we do + * not want to throw away any data. + * so, in this case we discard all the previous URBs BUT we report + * that the transfer was submitted successfully. then later when + * the final discard completes we can report error to the user. + */ + tpriv->reap_action = SUBMIT_FAILED; + + /* The URBs we haven't submitted yet we count as already + * retired. */ + tpriv->num_retired = num_urbs - i; + discard_urbs(itransfer, 0, i); + + usbi_dbg("reporting successful submission but waiting for %d " + "discards before reporting error", i); + return 0; + } + } + + return 0; +} + +static int submit_control_transfer(struct usbi_transfer *itransfer) +{ + struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct linux_device_handle_priv *dpriv = + _device_handle_priv(transfer->dev_handle); + struct usbfs_urb *urb; + int r; + + if (transfer->length - LIBUSB_CONTROL_SETUP_SIZE > MAX_CTRL_BUFFER_LENGTH) + return LIBUSB_ERROR_INVALID_PARAM; + + urb = calloc(1, sizeof(struct usbfs_urb)); + if (!urb) + return LIBUSB_ERROR_NO_MEM; + tpriv->urbs = urb; + tpriv->num_urbs = 1; + tpriv->reap_action = NORMAL; + + urb->usercontext = itransfer; + urb->type = USBFS_URB_TYPE_CONTROL; + urb->endpoint = transfer->endpoint; + urb->buffer = transfer->buffer; + urb->buffer_length = transfer->length; + + r = ioctl(dpriv->fd, IOCTL_USBFS_SUBMITURB, urb); + if (r < 0) { + free(urb); + tpriv->urbs = NULL; + if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_err(TRANSFER_CTX(transfer), + "submiturb failed error %d errno=%d", r, errno); + return LIBUSB_ERROR_IO; + } + return 0; +} + +static int op_submit_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + return submit_control_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + return submit_bulk_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + return submit_bulk_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + return submit_iso_transfer(itransfer); + default: + usbi_err(TRANSFER_CTX(transfer), + "unknown endpoint type %d", transfer->type); + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +static int op_cancel_transfer(struct usbi_transfer *itransfer) +{ + struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + int r; + + if (!tpriv->urbs) + return LIBUSB_ERROR_NOT_FOUND; + + r = discard_urbs(itransfer, 0, tpriv->num_urbs); + if (r != 0) + return r; + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + if (tpriv->reap_action == ERROR) + break; + /* else, fall through */ + default: + tpriv->reap_action = CANCELLED; + } + + return 0; +} + +static void op_clear_transfer_priv(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + + /* urbs can be freed also in submit_transfer so lock mutex first */ + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + if (tpriv->urbs) { + free(tpriv->urbs); + tpriv->urbs = NULL; + } + break; + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + if (tpriv->iso_urbs) { + free_iso_urbs(tpriv); + tpriv->iso_urbs = NULL; + } + break; + default: + usbi_err(TRANSFER_CTX(transfer), + "unknown endpoint type %d", transfer->type); + } +} + +static int handle_bulk_completion(struct usbi_transfer *itransfer, + struct usbfs_urb *urb) +{ + struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + int urb_idx = urb - tpriv->urbs; + + usbi_mutex_lock(&itransfer->lock); + usbi_dbg("handling completion status %d of bulk urb %d/%d", urb->status, + urb_idx + 1, tpriv->num_urbs); + + tpriv->num_retired++; + + if (tpriv->reap_action != NORMAL) { + /* cancelled, submit_fail, or completed early */ + usbi_dbg("abnormal reap: urb status %d", urb->status); + + /* even though we're in the process of cancelling, it's possible that + * we may receive some data in these URBs that we don't want to lose. + * examples: + * 1. while the kernel is cancelling all the packets that make up an + * URB, a few of them might complete. so we get back a successful + * cancellation *and* some data. + * 2. we receive a short URB which marks the early completion condition, + * so we start cancelling the remaining URBs. however, we're too + * slow and another URB completes (or at least completes partially). + * (this can't happen since we always use BULK_CONTINUATION.) + * + * When this happens, our objectives are not to lose any "surplus" data, + * and also to stick it at the end of the previously-received data + * (closing any holes), so that libusb reports the total amount of + * transferred data and presents it in a contiguous chunk. + */ + if (urb->actual_length > 0) { + unsigned char *target = transfer->buffer + itransfer->transferred; + usbi_dbg("received %d bytes of surplus data", urb->actual_length); + if (urb->buffer != target) { + usbi_dbg("moving surplus data from offset %d to offset %d", + (unsigned char *) urb->buffer - transfer->buffer, + target - transfer->buffer); + memmove(target, urb->buffer, urb->actual_length); + } + itransfer->transferred += urb->actual_length; + } + + if (tpriv->num_retired == tpriv->num_urbs) { + usbi_dbg("abnormal reap: last URB handled, reporting"); + if (tpriv->reap_action != COMPLETED_EARLY && + tpriv->reap_status == LIBUSB_TRANSFER_COMPLETED) + tpriv->reap_status = LIBUSB_TRANSFER_ERROR; + goto completed; + } + goto out_unlock; + } + + itransfer->transferred += urb->actual_length; + + /* Many of these errors can occur on *any* urb of a multi-urb + * transfer. When they do, we tear down the rest of the transfer. + */ + switch (urb->status) { + case 0: + break; + case -EREMOTEIO: /* short transfer */ + break; + case -ENOENT: /* cancelled */ + case -ECONNRESET: + break; + case -ENODEV: + case -ESHUTDOWN: + usbi_dbg("device removed"); + tpriv->reap_status = LIBUSB_TRANSFER_NO_DEVICE; + goto cancel_remaining; + case -EPIPE: + usbi_dbg("detected endpoint stall"); + if (tpriv->reap_status == LIBUSB_TRANSFER_COMPLETED) + tpriv->reap_status = LIBUSB_TRANSFER_STALL; + goto cancel_remaining; + case -EOVERFLOW: + /* overflow can only ever occur in the last urb */ + usbi_dbg("overflow, actual_length=%d", urb->actual_length); + if (tpriv->reap_status == LIBUSB_TRANSFER_COMPLETED) + tpriv->reap_status = LIBUSB_TRANSFER_OVERFLOW; + goto completed; + case -ETIME: + case -EPROTO: + case -EILSEQ: + case -ECOMM: + case -ENOSR: + usbi_dbg("low level error %d", urb->status); + tpriv->reap_action = ERROR; + goto cancel_remaining; + default: + usbi_warn(ITRANSFER_CTX(itransfer), + "unrecognised urb status %d", urb->status); + tpriv->reap_action = ERROR; + goto cancel_remaining; + } + + /* if we're the last urb or we got less data than requested then we're + * done */ + if (urb_idx == tpriv->num_urbs - 1) { + usbi_dbg("last URB in transfer --> complete!"); + goto completed; + } else if (urb->actual_length < urb->buffer_length) { + usbi_dbg("short transfer %d/%d --> complete!", + urb->actual_length, urb->buffer_length); + if (tpriv->reap_action == NORMAL) + tpriv->reap_action = COMPLETED_EARLY; + } else + goto out_unlock; + +cancel_remaining: + if (ERROR == tpriv->reap_action && LIBUSB_TRANSFER_COMPLETED == tpriv->reap_status) + tpriv->reap_status = LIBUSB_TRANSFER_ERROR; + + if (tpriv->num_retired == tpriv->num_urbs) /* nothing to cancel */ + goto completed; + + /* cancel remaining urbs and wait for their completion before + * reporting results */ + discard_urbs(itransfer, urb_idx + 1, tpriv->num_urbs); + +out_unlock: + usbi_mutex_unlock(&itransfer->lock); + return 0; + +completed: + free(tpriv->urbs); + tpriv->urbs = NULL; + usbi_mutex_unlock(&itransfer->lock); + return CANCELLED == tpriv->reap_action ? + usbi_handle_transfer_cancellation(itransfer) : + usbi_handle_transfer_completion(itransfer, tpriv->reap_status); +} + +static int handle_iso_completion(struct usbi_transfer *itransfer, + struct usbfs_urb *urb) +{ + struct libusb_transfer *transfer = + USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + int num_urbs = tpriv->num_urbs; + int urb_idx = 0; + int i; + enum libusb_transfer_status status = LIBUSB_TRANSFER_COMPLETED; + + usbi_mutex_lock(&itransfer->lock); + for (i = 0; i < num_urbs; i++) { + if (urb == tpriv->iso_urbs[i]) { + urb_idx = i + 1; + break; + } + } + if (urb_idx == 0) { + usbi_err(TRANSFER_CTX(transfer), "could not locate urb!"); + usbi_mutex_unlock(&itransfer->lock); + return LIBUSB_ERROR_NOT_FOUND; + } + + usbi_dbg("handling completion status %d of iso urb %d/%d", urb->status, + urb_idx, num_urbs); + + /* copy isochronous results back in */ + + for (i = 0; i < urb->number_of_packets; i++) { + struct usbfs_iso_packet_desc *urb_desc = &urb->iso_frame_desc[i]; + struct libusb_iso_packet_descriptor *lib_desc = + &transfer->iso_packet_desc[tpriv->iso_packet_offset++]; + lib_desc->status = LIBUSB_TRANSFER_COMPLETED; + switch (urb_desc->status) { + case 0: + break; + case -ENOENT: /* cancelled */ + case -ECONNRESET: + break; + case -ENODEV: + case -ESHUTDOWN: + usbi_dbg("device removed"); + lib_desc->status = LIBUSB_TRANSFER_NO_DEVICE; + break; + case -EPIPE: + usbi_dbg("detected endpoint stall"); + lib_desc->status = LIBUSB_TRANSFER_STALL; + break; + case -EOVERFLOW: + usbi_dbg("overflow error"); + lib_desc->status = LIBUSB_TRANSFER_OVERFLOW; + break; + case -ETIME: + case -EPROTO: + case -EILSEQ: + case -ECOMM: + case -ENOSR: + case -EXDEV: + usbi_dbg("low-level USB error %d", urb_desc->status); + lib_desc->status = LIBUSB_TRANSFER_ERROR; + break; + default: + usbi_warn(TRANSFER_CTX(transfer), + "unrecognised urb status %d", urb_desc->status); + lib_desc->status = LIBUSB_TRANSFER_ERROR; + break; + } + lib_desc->actual_length = urb_desc->actual_length; + } + + tpriv->num_retired++; + + if (tpriv->reap_action != NORMAL) { /* cancelled or submit_fail */ + usbi_dbg("CANCEL: urb status %d", urb->status); + + if (tpriv->num_retired == num_urbs) { + usbi_dbg("CANCEL: last URB handled, reporting"); + free_iso_urbs(tpriv); + if (tpriv->reap_action == CANCELLED) { + usbi_mutex_unlock(&itransfer->lock); + return usbi_handle_transfer_cancellation(itransfer); + } else { + usbi_mutex_unlock(&itransfer->lock); + return usbi_handle_transfer_completion(itransfer, + LIBUSB_TRANSFER_ERROR); + } + } + goto out; + } + + switch (urb->status) { + case 0: + break; + case -ENOENT: /* cancelled */ + case -ECONNRESET: + break; + case -ESHUTDOWN: + usbi_dbg("device removed"); + status = LIBUSB_TRANSFER_NO_DEVICE; + break; + default: + usbi_warn(TRANSFER_CTX(transfer), + "unrecognised urb status %d", urb->status); + status = LIBUSB_TRANSFER_ERROR; + break; + } + + /* if we're the last urb then we're done */ + if (urb_idx == num_urbs) { + usbi_dbg("last URB in transfer --> complete!"); + free_iso_urbs(tpriv); + usbi_mutex_unlock(&itransfer->lock); + return usbi_handle_transfer_completion(itransfer, status); + } + +out: + usbi_mutex_unlock(&itransfer->lock); + return 0; +} + +static int handle_control_completion(struct usbi_transfer *itransfer, + struct usbfs_urb *urb) +{ + struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); + int status; + + usbi_mutex_lock(&itransfer->lock); + usbi_dbg("handling completion status %d", urb->status); + + itransfer->transferred += urb->actual_length; + + if (tpriv->reap_action == CANCELLED) { + if (urb->status != 0 && urb->status != -ENOENT) + usbi_warn(ITRANSFER_CTX(itransfer), + "cancel: unrecognised urb status %d", urb->status); + free(tpriv->urbs); + tpriv->urbs = NULL; + usbi_mutex_unlock(&itransfer->lock); + return usbi_handle_transfer_cancellation(itransfer); + } + + switch (urb->status) { + case 0: + status = LIBUSB_TRANSFER_COMPLETED; + break; + case -ENOENT: /* cancelled */ + status = LIBUSB_TRANSFER_CANCELLED; + break; + case -ENODEV: + case -ESHUTDOWN: + usbi_dbg("device removed"); + status = LIBUSB_TRANSFER_NO_DEVICE; + break; + case -EPIPE: + usbi_dbg("unsupported control request"); + status = LIBUSB_TRANSFER_STALL; + break; + case -EOVERFLOW: + usbi_dbg("control overflow error"); + status = LIBUSB_TRANSFER_OVERFLOW; + break; + case -ETIME: + case -EPROTO: + case -EILSEQ: + case -ECOMM: + case -ENOSR: + usbi_dbg("low-level bus error occurred"); + status = LIBUSB_TRANSFER_ERROR; + break; + default: + usbi_warn(ITRANSFER_CTX(itransfer), + "unrecognised urb status %d", urb->status); + status = LIBUSB_TRANSFER_ERROR; + break; + } + + free(tpriv->urbs); + tpriv->urbs = NULL; + usbi_mutex_unlock(&itransfer->lock); + return usbi_handle_transfer_completion(itransfer, status); +} + +static int reap_for_handle(struct libusb_device_handle *handle) +{ + struct linux_device_handle_priv *hpriv = _device_handle_priv(handle); + int r; + struct usbfs_urb *urb; + struct usbi_transfer *itransfer; + struct libusb_transfer *transfer; + + r = ioctl(hpriv->fd, IOCTL_USBFS_REAPURBNDELAY, &urb); + if (r == -1 && errno == EAGAIN) + return 1; + if (r < 0) { + if (errno == ENODEV) + return LIBUSB_ERROR_NO_DEVICE; + + usbi_err(HANDLE_CTX(handle), "reap failed error %d errno=%d", + r, errno); + return LIBUSB_ERROR_IO; + } + + itransfer = urb->usercontext; + transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + usbi_dbg("urb type=%d status=%d transferred=%d", urb->type, urb->status, + urb->actual_length); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + return handle_iso_completion(itransfer, urb); + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + return handle_bulk_completion(itransfer, urb); + case LIBUSB_TRANSFER_TYPE_CONTROL: + return handle_control_completion(itransfer, urb); + default: + usbi_err(HANDLE_CTX(handle), "unrecognised endpoint type %x", + transfer->type); + return LIBUSB_ERROR_OTHER; + } +} + +static int op_handle_events(struct libusb_context *ctx, + struct pollfd *fds, POLL_NFDS_TYPE nfds, int num_ready) +{ + int r; + unsigned int i = 0; + + usbi_mutex_lock(&ctx->open_devs_lock); + for (i = 0; i < nfds && num_ready > 0; i++) { + struct pollfd *pollfd = &fds[i]; + struct libusb_device_handle *handle; + struct linux_device_handle_priv *hpriv = NULL; + + if (!pollfd->revents) + continue; + + num_ready--; + list_for_each_entry(handle, &ctx->open_devs, list, struct libusb_device_handle) { + hpriv = _device_handle_priv(handle); + if (hpriv->fd == pollfd->fd) + break; + } + + if (!hpriv || hpriv->fd != pollfd->fd) { + usbi_err(ctx, "cannot find handle for fd %d", + pollfd->fd); + continue; + } + + if (pollfd->revents & POLLERR) { + /* remove the fd from the pollfd set so that it doesn't continuously + * trigger an event, and flag that it has been removed so op_close() + * doesn't try to remove it a second time */ + usbi_remove_pollfd(HANDLE_CTX(handle), hpriv->fd); + hpriv->fd_removed = 1; + + /* device will still be marked as attached if hotplug monitor thread + * hasn't processed remove event yet */ + usbi_mutex_static_lock(&linux_hotplug_lock); + if (handle->dev->attached) + linux_device_disconnected(handle->dev->bus_number, + handle->dev->device_address); + usbi_mutex_static_unlock(&linux_hotplug_lock); + + if (hpriv->caps & USBFS_CAP_REAP_AFTER_DISCONNECT) { + do { + r = reap_for_handle(handle); + } while (r == 0); + } + + usbi_handle_disconnect(handle); + continue; + } + + do { + r = reap_for_handle(handle); + } while (r == 0); + if (r == 1 || r == LIBUSB_ERROR_NO_DEVICE) + continue; + else if (r < 0) + goto out; + } + + r = 0; +out: + usbi_mutex_unlock(&ctx->open_devs_lock); + return r; +} + +static int op_clock_gettime(int clk_id, struct timespec *tp) +{ + switch (clk_id) { + case USBI_CLOCK_MONOTONIC: + return clock_gettime(monotonic_clkid, tp); + case USBI_CLOCK_REALTIME: + return clock_gettime(CLOCK_REALTIME, tp); + default: + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +#ifdef USBI_TIMERFD_AVAILABLE +static clockid_t op_get_timerfd_clockid(void) +{ + return monotonic_clkid; + +} +#endif + +const struct usbi_os_backend linux_usbfs_backend = { + .name = "Linux usbfs", + .caps = USBI_CAP_HAS_HID_ACCESS|USBI_CAP_SUPPORTS_DETACH_KERNEL_DRIVER, + .init = op_init, + .exit = op_exit, + .get_device_list = NULL, + .hotplug_poll = op_hotplug_poll, + .get_device_descriptor = op_get_device_descriptor, + .get_active_config_descriptor = op_get_active_config_descriptor, + .get_config_descriptor = op_get_config_descriptor, + .get_config_descriptor_by_value = op_get_config_descriptor_by_value, + + .open = op_open, + .close = op_close, + .get_configuration = op_get_configuration, + .set_configuration = op_set_configuration, + .claim_interface = op_claim_interface, + .release_interface = op_release_interface, + + .set_interface_altsetting = op_set_interface, + .clear_halt = op_clear_halt, + .reset_device = op_reset_device, + + .alloc_streams = op_alloc_streams, + .free_streams = op_free_streams, + + .dev_mem_alloc = op_dev_mem_alloc, + .dev_mem_free = op_dev_mem_free, + + .kernel_driver_active = op_kernel_driver_active, + .detach_kernel_driver = op_detach_kernel_driver, + .attach_kernel_driver = op_attach_kernel_driver, + + .destroy_device = op_destroy_device, + + .submit_transfer = op_submit_transfer, + .cancel_transfer = op_cancel_transfer, + .clear_transfer_priv = op_clear_transfer_priv, + + .handle_events = op_handle_events, + + .clock_gettime = op_clock_gettime, + +#ifdef USBI_TIMERFD_AVAILABLE + .get_timerfd_clockid = op_get_timerfd_clockid, +#endif + + .device_priv_size = sizeof(struct linux_device_priv), + .device_handle_priv_size = sizeof(struct linux_device_handle_priv), + .transfer_priv_size = sizeof(struct linux_transfer_priv), +}; diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_usbfs.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_usbfs.h new file mode 100644 index 000000000..8bd3ebcb1 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/linux_usbfs.h @@ -0,0 +1,193 @@ +/* + * usbfs header structures + * Copyright © 2007 Daniel Drake + * Copyright © 2001 Johannes Erdfelt + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LIBUSB_USBFS_H +#define LIBUSB_USBFS_H + +#include + +#define SYSFS_DEVICE_PATH "/sys/bus/usb/devices" + +struct usbfs_ctrltransfer { + /* keep in sync with usbdevice_fs.h:usbdevfs_ctrltransfer */ + uint8_t bmRequestType; + uint8_t bRequest; + uint16_t wValue; + uint16_t wIndex; + uint16_t wLength; + + uint32_t timeout; /* in milliseconds */ + + /* pointer to data */ + void *data; +}; + +struct usbfs_bulktransfer { + /* keep in sync with usbdevice_fs.h:usbdevfs_bulktransfer */ + unsigned int ep; + unsigned int len; + unsigned int timeout; /* in milliseconds */ + + /* pointer to data */ + void *data; +}; + +struct usbfs_setinterface { + /* keep in sync with usbdevice_fs.h:usbdevfs_setinterface */ + unsigned int interface; + unsigned int altsetting; +}; + +#define USBFS_MAXDRIVERNAME 255 + +struct usbfs_getdriver { + unsigned int interface; + char driver[USBFS_MAXDRIVERNAME + 1]; +}; + +#define USBFS_URB_SHORT_NOT_OK 0x01 +#define USBFS_URB_ISO_ASAP 0x02 +#define USBFS_URB_BULK_CONTINUATION 0x04 +#define USBFS_URB_QUEUE_BULK 0x10 +#define USBFS_URB_ZERO_PACKET 0x40 + +enum usbfs_urb_type { + USBFS_URB_TYPE_ISO = 0, + USBFS_URB_TYPE_INTERRUPT = 1, + USBFS_URB_TYPE_CONTROL = 2, + USBFS_URB_TYPE_BULK = 3, +}; + +struct usbfs_iso_packet_desc { + unsigned int length; + unsigned int actual_length; + unsigned int status; +}; + +#define MAX_ISO_BUFFER_LENGTH 49152 * 128 +#define MAX_BULK_BUFFER_LENGTH 16384 +#define MAX_CTRL_BUFFER_LENGTH 4096 + +struct usbfs_urb { + unsigned char type; + unsigned char endpoint; + int status; + unsigned int flags; + void *buffer; + int buffer_length; + int actual_length; + int start_frame; + union { + int number_of_packets; /* Only used for isoc urbs */ + unsigned int stream_id; /* Only used with bulk streams */ + }; + int error_count; + unsigned int signr; + void *usercontext; + struct usbfs_iso_packet_desc iso_frame_desc[0]; +}; + +struct usbfs_connectinfo { + unsigned int devnum; + unsigned char slow; +}; + +struct usbfs_ioctl { + int ifno; /* interface 0..N ; negative numbers reserved */ + int ioctl_code; /* MUST encode size + direction of data so the + * macros in give correct values */ + void *data; /* param buffer (in, or out) */ +}; + +struct usbfs_hub_portinfo { + unsigned char numports; + unsigned char port[127]; /* port to device num mapping */ +}; + +#define USBFS_CAP_ZERO_PACKET 0x01 +#define USBFS_CAP_BULK_CONTINUATION 0x02 +#define USBFS_CAP_NO_PACKET_SIZE_LIM 0x04 +#define USBFS_CAP_BULK_SCATTER_GATHER 0x08 +#define USBFS_CAP_REAP_AFTER_DISCONNECT 0x10 + +#define USBFS_DISCONNECT_CLAIM_IF_DRIVER 0x01 +#define USBFS_DISCONNECT_CLAIM_EXCEPT_DRIVER 0x02 + +struct usbfs_disconnect_claim { + unsigned int interface; + unsigned int flags; + char driver[USBFS_MAXDRIVERNAME + 1]; +}; + +struct usbfs_streams { + unsigned int num_streams; /* Not used by USBDEVFS_FREE_STREAMS */ + unsigned int num_eps; + unsigned char eps[0]; +}; + +#define IOCTL_USBFS_CONTROL _IOWR('U', 0, struct usbfs_ctrltransfer) +#define IOCTL_USBFS_BULK _IOWR('U', 2, struct usbfs_bulktransfer) +#define IOCTL_USBFS_RESETEP _IOR('U', 3, unsigned int) +#define IOCTL_USBFS_SETINTF _IOR('U', 4, struct usbfs_setinterface) +#define IOCTL_USBFS_SETCONFIG _IOR('U', 5, unsigned int) +#define IOCTL_USBFS_GETDRIVER _IOW('U', 8, struct usbfs_getdriver) +#define IOCTL_USBFS_SUBMITURB _IOR('U', 10, struct usbfs_urb) +#define IOCTL_USBFS_DISCARDURB _IO('U', 11) +#define IOCTL_USBFS_REAPURB _IOW('U', 12, void *) +#define IOCTL_USBFS_REAPURBNDELAY _IOW('U', 13, void *) +#define IOCTL_USBFS_CLAIMINTF _IOR('U', 15, unsigned int) +#define IOCTL_USBFS_RELEASEINTF _IOR('U', 16, unsigned int) +#define IOCTL_USBFS_CONNECTINFO _IOW('U', 17, struct usbfs_connectinfo) +#define IOCTL_USBFS_IOCTL _IOWR('U', 18, struct usbfs_ioctl) +#define IOCTL_USBFS_HUB_PORTINFO _IOR('U', 19, struct usbfs_hub_portinfo) +#define IOCTL_USBFS_RESET _IO('U', 20) +#define IOCTL_USBFS_CLEAR_HALT _IOR('U', 21, unsigned int) +#define IOCTL_USBFS_DISCONNECT _IO('U', 22) +#define IOCTL_USBFS_CONNECT _IO('U', 23) +#define IOCTL_USBFS_CLAIM_PORT _IOR('U', 24, unsigned int) +#define IOCTL_USBFS_RELEASE_PORT _IOR('U', 25, unsigned int) +#define IOCTL_USBFS_GET_CAPABILITIES _IOR('U', 26, __u32) +#define IOCTL_USBFS_DISCONNECT_CLAIM _IOR('U', 27, struct usbfs_disconnect_claim) +#define IOCTL_USBFS_ALLOC_STREAMS _IOR('U', 28, struct usbfs_streams) +#define IOCTL_USBFS_FREE_STREAMS _IOR('U', 29, struct usbfs_streams) + +extern usbi_mutex_static_t linux_hotplug_lock; + +#if defined(HAVE_LIBUDEV) +int linux_udev_start_event_monitor(void); +int linux_udev_stop_event_monitor(void); +int linux_udev_scan_devices(struct libusb_context *ctx); +void linux_udev_hotplug_poll(void); +#else +int linux_netlink_start_event_monitor(void); +int linux_netlink_stop_event_monitor(void); +void linux_netlink_hotplug_poll(void); +#endif + +void linux_hotplug_enumerate(uint8_t busnum, uint8_t devaddr, const char *sys_name); +void linux_device_disconnected(uint8_t busnum, uint8_t devaddr); + +int linux_get_device_address (struct libusb_context *ctx, int detached, + uint8_t *busnum, uint8_t *devaddr, const char *dev_node, + const char *sys_name); +int linux_enumerate_device(struct libusb_context *ctx, + uint8_t busnum, uint8_t devaddr, const char *sysfs_dir); + +#endif diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/netbsd_usb.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/netbsd_usb.c new file mode 100644 index 000000000..ad1ede73e --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/netbsd_usb.c @@ -0,0 +1,677 @@ +/* + * Copyright © 2011 Martin Pieuchot + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include + +#include +#include +#include +#include +#include +#include + +#include + +#include "libusbi.h" + +struct device_priv { + char devnode[16]; + int fd; + + unsigned char *cdesc; /* active config descriptor */ + usb_device_descriptor_t ddesc; /* usb device descriptor */ +}; + +struct handle_priv { + int endpoints[USB_MAX_ENDPOINTS]; +}; + +/* + * Backend functions + */ +static int netbsd_get_device_list(struct libusb_context *, + struct discovered_devs **); +static int netbsd_open(struct libusb_device_handle *); +static void netbsd_close(struct libusb_device_handle *); + +static int netbsd_get_device_descriptor(struct libusb_device *, unsigned char *, + int *); +static int netbsd_get_active_config_descriptor(struct libusb_device *, + unsigned char *, size_t, int *); +static int netbsd_get_config_descriptor(struct libusb_device *, uint8_t, + unsigned char *, size_t, int *); + +static int netbsd_get_configuration(struct libusb_device_handle *, int *); +static int netbsd_set_configuration(struct libusb_device_handle *, int); + +static int netbsd_claim_interface(struct libusb_device_handle *, int); +static int netbsd_release_interface(struct libusb_device_handle *, int); + +static int netbsd_set_interface_altsetting(struct libusb_device_handle *, int, + int); +static int netbsd_clear_halt(struct libusb_device_handle *, unsigned char); +static int netbsd_reset_device(struct libusb_device_handle *); +static void netbsd_destroy_device(struct libusb_device *); + +static int netbsd_submit_transfer(struct usbi_transfer *); +static int netbsd_cancel_transfer(struct usbi_transfer *); +static void netbsd_clear_transfer_priv(struct usbi_transfer *); +static int netbsd_handle_transfer_completion(struct usbi_transfer *); +static int netbsd_clock_gettime(int, struct timespec *); + +/* + * Private functions + */ +static int _errno_to_libusb(int); +static int _cache_active_config_descriptor(struct libusb_device *, int); +static int _sync_control_transfer(struct usbi_transfer *); +static int _sync_gen_transfer(struct usbi_transfer *); +static int _access_endpoint(struct libusb_transfer *); + +const struct usbi_os_backend netbsd_backend = { + "Synchronous NetBSD backend", + 0, + NULL, /* init() */ + NULL, /* exit() */ + netbsd_get_device_list, + NULL, /* hotplug_poll */ + netbsd_open, + netbsd_close, + + netbsd_get_device_descriptor, + netbsd_get_active_config_descriptor, + netbsd_get_config_descriptor, + NULL, /* get_config_descriptor_by_value() */ + + netbsd_get_configuration, + netbsd_set_configuration, + + netbsd_claim_interface, + netbsd_release_interface, + + netbsd_set_interface_altsetting, + netbsd_clear_halt, + netbsd_reset_device, + + NULL, /* alloc_streams */ + NULL, /* free_streams */ + + NULL, /* dev_mem_alloc() */ + NULL, /* dev_mem_free() */ + + NULL, /* kernel_driver_active() */ + NULL, /* detach_kernel_driver() */ + NULL, /* attach_kernel_driver() */ + + netbsd_destroy_device, + + netbsd_submit_transfer, + netbsd_cancel_transfer, + netbsd_clear_transfer_priv, + + NULL, /* handle_events() */ + netbsd_handle_transfer_completion, + + netbsd_clock_gettime, + sizeof(struct device_priv), + sizeof(struct handle_priv), + 0, /* transfer_priv_size */ +}; + +int +netbsd_get_device_list(struct libusb_context * ctx, + struct discovered_devs **discdevs) +{ + struct libusb_device *dev; + struct device_priv *dpriv; + struct usb_device_info di; + unsigned long session_id; + char devnode[16]; + int fd, err, i; + + usbi_dbg(""); + + /* Only ugen(4) is supported */ + for (i = 0; i < USB_MAX_DEVICES; i++) { + /* Control endpoint is always .00 */ + snprintf(devnode, sizeof(devnode), "/dev/ugen%d.00", i); + + if ((fd = open(devnode, O_RDONLY)) < 0) { + if (errno != ENOENT && errno != ENXIO) + usbi_err(ctx, "could not open %s", devnode); + continue; + } + + if (ioctl(fd, USB_GET_DEVICEINFO, &di) < 0) + continue; + + session_id = (di.udi_bus << 8 | di.udi_addr); + dev = usbi_get_device_by_session_id(ctx, session_id); + + if (dev == NULL) { + dev = usbi_alloc_device(ctx, session_id); + if (dev == NULL) + return (LIBUSB_ERROR_NO_MEM); + + dev->bus_number = di.udi_bus; + dev->device_address = di.udi_addr; + dev->speed = di.udi_speed; + + dpriv = (struct device_priv *)dev->os_priv; + strlcpy(dpriv->devnode, devnode, sizeof(devnode)); + dpriv->fd = -1; + + if (ioctl(fd, USB_GET_DEVICE_DESC, &dpriv->ddesc) < 0) { + err = errno; + goto error; + } + + dpriv->cdesc = NULL; + if (_cache_active_config_descriptor(dev, fd)) { + err = errno; + goto error; + } + + if ((err = usbi_sanitize_device(dev))) + goto error; + } + close(fd); + + if (discovered_devs_append(*discdevs, dev) == NULL) + return (LIBUSB_ERROR_NO_MEM); + + libusb_unref_device(dev); + } + + return (LIBUSB_SUCCESS); + +error: + close(fd); + libusb_unref_device(dev); + return _errno_to_libusb(err); +} + +int +netbsd_open(struct libusb_device_handle *handle) +{ + struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv; + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + + dpriv->fd = open(dpriv->devnode, O_RDWR); + if (dpriv->fd < 0) { + dpriv->fd = open(dpriv->devnode, O_RDONLY); + if (dpriv->fd < 0) + return _errno_to_libusb(errno); + } + + usbi_dbg("open %s: fd %d", dpriv->devnode, dpriv->fd); + + return (LIBUSB_SUCCESS); +} + +void +netbsd_close(struct libusb_device_handle *handle) +{ + struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv; + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + + usbi_dbg("close: fd %d", dpriv->fd); + + close(dpriv->fd); + dpriv->fd = -1; +} + +int +netbsd_get_device_descriptor(struct libusb_device *dev, unsigned char *buf, + int *host_endian) +{ + struct device_priv *dpriv = (struct device_priv *)dev->os_priv; + + usbi_dbg(""); + + memcpy(buf, &dpriv->ddesc, DEVICE_DESC_LENGTH); + + *host_endian = 0; + + return (LIBUSB_SUCCESS); +} + +int +netbsd_get_active_config_descriptor(struct libusb_device *dev, + unsigned char *buf, size_t len, int *host_endian) +{ + struct device_priv *dpriv = (struct device_priv *)dev->os_priv; + usb_config_descriptor_t *ucd; + + ucd = (usb_config_descriptor_t *) dpriv->cdesc; + len = MIN(len, UGETW(ucd->wTotalLength)); + + usbi_dbg("len %d", len); + + memcpy(buf, dpriv->cdesc, len); + + *host_endian = 0; + + return len; +} + +int +netbsd_get_config_descriptor(struct libusb_device *dev, uint8_t idx, + unsigned char *buf, size_t len, int *host_endian) +{ + struct device_priv *dpriv = (struct device_priv *)dev->os_priv; + struct usb_full_desc ufd; + int fd, err; + + usbi_dbg("index %d, len %d", idx, len); + + /* A config descriptor may be requested before opening the device */ + if (dpriv->fd >= 0) { + fd = dpriv->fd; + } else { + fd = open(dpriv->devnode, O_RDONLY); + if (fd < 0) + return _errno_to_libusb(errno); + } + + ufd.ufd_config_index = idx; + ufd.ufd_size = len; + ufd.ufd_data = buf; + + if ((ioctl(fd, USB_GET_FULL_DESC, &ufd)) < 0) { + err = errno; + if (dpriv->fd < 0) + close(fd); + return _errno_to_libusb(err); + } + + if (dpriv->fd < 0) + close(fd); + + *host_endian = 0; + + return len; +} + +int +netbsd_get_configuration(struct libusb_device_handle *handle, int *config) +{ + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + + usbi_dbg(""); + + if (ioctl(dpriv->fd, USB_GET_CONFIG, config) < 0) + return _errno_to_libusb(errno); + + usbi_dbg("configuration %d", *config); + + return (LIBUSB_SUCCESS); +} + +int +netbsd_set_configuration(struct libusb_device_handle *handle, int config) +{ + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + + usbi_dbg("configuration %d", config); + + if (ioctl(dpriv->fd, USB_SET_CONFIG, &config) < 0) + return _errno_to_libusb(errno); + + return _cache_active_config_descriptor(handle->dev, dpriv->fd); +} + +int +netbsd_claim_interface(struct libusb_device_handle *handle, int iface) +{ + struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv; + int i; + + for (i = 0; i < USB_MAX_ENDPOINTS; i++) + hpriv->endpoints[i] = -1; + + return (LIBUSB_SUCCESS); +} + +int +netbsd_release_interface(struct libusb_device_handle *handle, int iface) +{ + struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv; + int i; + + for (i = 0; i < USB_MAX_ENDPOINTS; i++) + if (hpriv->endpoints[i] >= 0) + close(hpriv->endpoints[i]); + + return (LIBUSB_SUCCESS); +} + +int +netbsd_set_interface_altsetting(struct libusb_device_handle *handle, int iface, + int altsetting) +{ + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + struct usb_alt_interface intf; + + usbi_dbg("iface %d, setting %d", iface, altsetting); + + memset(&intf, 0, sizeof(intf)); + + intf.uai_interface_index = iface; + intf.uai_alt_no = altsetting; + + if (ioctl(dpriv->fd, USB_SET_ALTINTERFACE, &intf) < 0) + return _errno_to_libusb(errno); + + return (LIBUSB_SUCCESS); +} + +int +netbsd_clear_halt(struct libusb_device_handle *handle, unsigned char endpoint) +{ + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + struct usb_ctl_request req; + + usbi_dbg(""); + + req.ucr_request.bmRequestType = UT_WRITE_ENDPOINT; + req.ucr_request.bRequest = UR_CLEAR_FEATURE; + USETW(req.ucr_request.wValue, UF_ENDPOINT_HALT); + USETW(req.ucr_request.wIndex, endpoint); + USETW(req.ucr_request.wLength, 0); + + if (ioctl(dpriv->fd, USB_DO_REQUEST, &req) < 0) + return _errno_to_libusb(errno); + + return (LIBUSB_SUCCESS); +} + +int +netbsd_reset_device(struct libusb_device_handle *handle) +{ + usbi_dbg(""); + + return (LIBUSB_ERROR_NOT_SUPPORTED); +} + +void +netbsd_destroy_device(struct libusb_device *dev) +{ + struct device_priv *dpriv = (struct device_priv *)dev->os_priv; + + usbi_dbg(""); + + free(dpriv->cdesc); +} + +int +netbsd_submit_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer; + struct handle_priv *hpriv; + int err = 0; + + usbi_dbg(""); + + transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + hpriv = (struct handle_priv *)transfer->dev_handle->os_priv; + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + err = _sync_control_transfer(itransfer); + break; + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + if (IS_XFEROUT(transfer)) { + /* Isochronous write is not supported */ + err = LIBUSB_ERROR_NOT_SUPPORTED; + break; + } + err = _sync_gen_transfer(itransfer); + break; + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + if (IS_XFEROUT(transfer) && + transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) { + err = LIBUSB_ERROR_NOT_SUPPORTED; + break; + } + err = _sync_gen_transfer(itransfer); + break; + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + err = LIBUSB_ERROR_NOT_SUPPORTED; + break; + } + + if (err) + return (err); + + usbi_signal_transfer_completion(itransfer); + + return (LIBUSB_SUCCESS); +} + +int +netbsd_cancel_transfer(struct usbi_transfer *itransfer) +{ + usbi_dbg(""); + + return (LIBUSB_ERROR_NOT_SUPPORTED); +} + +void +netbsd_clear_transfer_priv(struct usbi_transfer *itransfer) +{ + usbi_dbg(""); + + /* Nothing to do */ +} + +int +netbsd_handle_transfer_completion(struct usbi_transfer *itransfer) +{ + return usbi_handle_transfer_completion(itransfer, LIBUSB_TRANSFER_COMPLETED); +} + +int +netbsd_clock_gettime(int clkid, struct timespec *tp) +{ + usbi_dbg("clock %d", clkid); + + if (clkid == USBI_CLOCK_REALTIME) + return clock_gettime(CLOCK_REALTIME, tp); + + if (clkid == USBI_CLOCK_MONOTONIC) + return clock_gettime(CLOCK_MONOTONIC, tp); + + return (LIBUSB_ERROR_INVALID_PARAM); +} + +int +_errno_to_libusb(int err) +{ + switch (err) { + case EIO: + return (LIBUSB_ERROR_IO); + case EACCES: + return (LIBUSB_ERROR_ACCESS); + case ENOENT: + return (LIBUSB_ERROR_NO_DEVICE); + case ENOMEM: + return (LIBUSB_ERROR_NO_MEM); + } + + usbi_dbg("error: %s", strerror(err)); + + return (LIBUSB_ERROR_OTHER); +} + +int +_cache_active_config_descriptor(struct libusb_device *dev, int fd) +{ + struct device_priv *dpriv = (struct device_priv *)dev->os_priv; + struct usb_config_desc ucd; + struct usb_full_desc ufd; + unsigned char* buf; + int len; + + usbi_dbg("fd %d", fd); + + ucd.ucd_config_index = USB_CURRENT_CONFIG_INDEX; + + if ((ioctl(fd, USB_GET_CONFIG_DESC, &ucd)) < 0) + return _errno_to_libusb(errno); + + usbi_dbg("active bLength %d", ucd.ucd_desc.bLength); + + len = UGETW(ucd.ucd_desc.wTotalLength); + buf = malloc(len); + if (buf == NULL) + return (LIBUSB_ERROR_NO_MEM); + + ufd.ufd_config_index = ucd.ucd_config_index; + ufd.ufd_size = len; + ufd.ufd_data = buf; + + usbi_dbg("index %d, len %d", ufd.ufd_config_index, len); + + if ((ioctl(fd, USB_GET_FULL_DESC, &ufd)) < 0) { + free(buf); + return _errno_to_libusb(errno); + } + + if (dpriv->cdesc) + free(dpriv->cdesc); + dpriv->cdesc = buf; + + return (0); +} + +int +_sync_control_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer; + struct libusb_control_setup *setup; + struct device_priv *dpriv; + struct usb_ctl_request req; + + transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + dpriv = (struct device_priv *)transfer->dev_handle->dev->os_priv; + setup = (struct libusb_control_setup *)transfer->buffer; + + usbi_dbg("type %d request %d value %d index %d length %d timeout %d", + setup->bmRequestType, setup->bRequest, + libusb_le16_to_cpu(setup->wValue), + libusb_le16_to_cpu(setup->wIndex), + libusb_le16_to_cpu(setup->wLength), transfer->timeout); + + req.ucr_request.bmRequestType = setup->bmRequestType; + req.ucr_request.bRequest = setup->bRequest; + /* Don't use USETW, libusb already deals with the endianness */ + (*(uint16_t *)req.ucr_request.wValue) = setup->wValue; + (*(uint16_t *)req.ucr_request.wIndex) = setup->wIndex; + (*(uint16_t *)req.ucr_request.wLength) = setup->wLength; + req.ucr_data = transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE; + + if ((transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) == 0) + req.ucr_flags = USBD_SHORT_XFER_OK; + + if ((ioctl(dpriv->fd, USB_SET_TIMEOUT, &transfer->timeout)) < 0) + return _errno_to_libusb(errno); + + if ((ioctl(dpriv->fd, USB_DO_REQUEST, &req)) < 0) + return _errno_to_libusb(errno); + + itransfer->transferred = req.ucr_actlen; + + usbi_dbg("transferred %d", itransfer->transferred); + + return (0); +} + +int +_access_endpoint(struct libusb_transfer *transfer) +{ + struct handle_priv *hpriv; + struct device_priv *dpriv; + char *s, devnode[16]; + int fd, endpt; + mode_t mode; + + hpriv = (struct handle_priv *)transfer->dev_handle->os_priv; + dpriv = (struct device_priv *)transfer->dev_handle->dev->os_priv; + + endpt = UE_GET_ADDR(transfer->endpoint); + mode = IS_XFERIN(transfer) ? O_RDONLY : O_WRONLY; + + usbi_dbg("endpoint %d mode %d", endpt, mode); + + if (hpriv->endpoints[endpt] < 0) { + /* Pick the right node given the control one */ + strlcpy(devnode, dpriv->devnode, sizeof(devnode)); + s = strchr(devnode, '.'); + snprintf(s, 4, ".%02d", endpt); + + /* We may need to read/write to the same endpoint later. */ + if (((fd = open(devnode, O_RDWR)) < 0) && (errno == ENXIO)) + if ((fd = open(devnode, mode)) < 0) + return (-1); + + hpriv->endpoints[endpt] = fd; + } + + return (hpriv->endpoints[endpt]); +} + +int +_sync_gen_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer; + int fd, nr = 1; + + transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + /* + * Bulk, Interrupt or Isochronous transfer depends on the + * endpoint and thus the node to open. + */ + if ((fd = _access_endpoint(transfer)) < 0) + return _errno_to_libusb(errno); + + if ((ioctl(fd, USB_SET_TIMEOUT, &transfer->timeout)) < 0) + return _errno_to_libusb(errno); + + if (IS_XFERIN(transfer)) { + if ((transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) == 0) + if ((ioctl(fd, USB_SET_SHORT_XFER, &nr)) < 0) + return _errno_to_libusb(errno); + + nr = read(fd, transfer->buffer, transfer->length); + } else { + nr = write(fd, transfer->buffer, transfer->length); + } + + if (nr < 0) + return _errno_to_libusb(errno); + + itransfer->transferred = nr; + + return (0); +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/openbsd_usb.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/openbsd_usb.c new file mode 100644 index 000000000..c66025711 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/openbsd_usb.c @@ -0,0 +1,771 @@ +/* + * Copyright © 2011-2013 Martin Pieuchot + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include + +#include +#include +#include +#include +#include +#include + +#include + +#include "libusbi.h" + +struct device_priv { + char *devname; /* name of the ugen(4) node */ + int fd; /* device file descriptor */ + + unsigned char *cdesc; /* active config descriptor */ + usb_device_descriptor_t ddesc; /* usb device descriptor */ +}; + +struct handle_priv { + int endpoints[USB_MAX_ENDPOINTS]; +}; + +/* + * Backend functions + */ +static int obsd_get_device_list(struct libusb_context *, + struct discovered_devs **); +static int obsd_open(struct libusb_device_handle *); +static void obsd_close(struct libusb_device_handle *); + +static int obsd_get_device_descriptor(struct libusb_device *, unsigned char *, + int *); +static int obsd_get_active_config_descriptor(struct libusb_device *, + unsigned char *, size_t, int *); +static int obsd_get_config_descriptor(struct libusb_device *, uint8_t, + unsigned char *, size_t, int *); + +static int obsd_get_configuration(struct libusb_device_handle *, int *); +static int obsd_set_configuration(struct libusb_device_handle *, int); + +static int obsd_claim_interface(struct libusb_device_handle *, int); +static int obsd_release_interface(struct libusb_device_handle *, int); + +static int obsd_set_interface_altsetting(struct libusb_device_handle *, int, + int); +static int obsd_clear_halt(struct libusb_device_handle *, unsigned char); +static int obsd_reset_device(struct libusb_device_handle *); +static void obsd_destroy_device(struct libusb_device *); + +static int obsd_submit_transfer(struct usbi_transfer *); +static int obsd_cancel_transfer(struct usbi_transfer *); +static void obsd_clear_transfer_priv(struct usbi_transfer *); +static int obsd_handle_transfer_completion(struct usbi_transfer *); +static int obsd_clock_gettime(int, struct timespec *); + +/* + * Private functions + */ +static int _errno_to_libusb(int); +static int _cache_active_config_descriptor(struct libusb_device *); +static int _sync_control_transfer(struct usbi_transfer *); +static int _sync_gen_transfer(struct usbi_transfer *); +static int _access_endpoint(struct libusb_transfer *); + +static int _bus_open(int); + + +const struct usbi_os_backend openbsd_backend = { + "Synchronous OpenBSD backend", + 0, + NULL, /* init() */ + NULL, /* exit() */ + obsd_get_device_list, + NULL, /* hotplug_poll */ + obsd_open, + obsd_close, + + obsd_get_device_descriptor, + obsd_get_active_config_descriptor, + obsd_get_config_descriptor, + NULL, /* get_config_descriptor_by_value() */ + + obsd_get_configuration, + obsd_set_configuration, + + obsd_claim_interface, + obsd_release_interface, + + obsd_set_interface_altsetting, + obsd_clear_halt, + obsd_reset_device, + + NULL, /* alloc_streams */ + NULL, /* free_streams */ + + NULL, /* dev_mem_alloc() */ + NULL, /* dev_mem_free() */ + + NULL, /* kernel_driver_active() */ + NULL, /* detach_kernel_driver() */ + NULL, /* attach_kernel_driver() */ + + obsd_destroy_device, + + obsd_submit_transfer, + obsd_cancel_transfer, + obsd_clear_transfer_priv, + + NULL, /* handle_events() */ + obsd_handle_transfer_completion, + + obsd_clock_gettime, + sizeof(struct device_priv), + sizeof(struct handle_priv), + 0, /* transfer_priv_size */ +}; + +#define DEVPATH "/dev/" +#define USBDEV DEVPATH "usb" + +int +obsd_get_device_list(struct libusb_context * ctx, + struct discovered_devs **discdevs) +{ + struct discovered_devs *ddd; + struct libusb_device *dev; + struct device_priv *dpriv; + struct usb_device_info di; + struct usb_device_ddesc dd; + unsigned long session_id; + char devices[USB_MAX_DEVICES]; + char busnode[16]; + char *udevname; + int fd, addr, i, j; + + usbi_dbg(""); + + for (i = 0; i < 8; i++) { + snprintf(busnode, sizeof(busnode), USBDEV "%d", i); + + if ((fd = open(busnode, O_RDWR)) < 0) { + if (errno != ENOENT && errno != ENXIO) + usbi_err(ctx, "could not open %s", busnode); + continue; + } + + bzero(devices, sizeof(devices)); + for (addr = 1; addr < USB_MAX_DEVICES; addr++) { + if (devices[addr]) + continue; + + di.udi_addr = addr; + if (ioctl(fd, USB_DEVICEINFO, &di) < 0) + continue; + + /* + * XXX If ugen(4) is attached to the USB device + * it will be used. + */ + udevname = NULL; + for (j = 0; j < USB_MAX_DEVNAMES; j++) + if (!strncmp("ugen", di.udi_devnames[j], 4)) { + udevname = strdup(di.udi_devnames[j]); + break; + } + + session_id = (di.udi_bus << 8 | di.udi_addr); + dev = usbi_get_device_by_session_id(ctx, session_id); + + if (dev == NULL) { + dev = usbi_alloc_device(ctx, session_id); + if (dev == NULL) { + close(fd); + return (LIBUSB_ERROR_NO_MEM); + } + + dev->bus_number = di.udi_bus; + dev->device_address = di.udi_addr; + dev->speed = di.udi_speed; + + dpriv = (struct device_priv *)dev->os_priv; + dpriv->fd = -1; + dpriv->cdesc = NULL; + dpriv->devname = udevname; + + dd.udd_bus = di.udi_bus; + dd.udd_addr = di.udi_addr; + if (ioctl(fd, USB_DEVICE_GET_DDESC, &dd) < 0) { + libusb_unref_device(dev); + continue; + } + dpriv->ddesc = dd.udd_desc; + + if (_cache_active_config_descriptor(dev)) { + libusb_unref_device(dev); + continue; + } + + if (usbi_sanitize_device(dev)) { + libusb_unref_device(dev); + continue; + } + } + + ddd = discovered_devs_append(*discdevs, dev); + if (ddd == NULL) { + close(fd); + return (LIBUSB_ERROR_NO_MEM); + } + libusb_unref_device(dev); + + *discdevs = ddd; + devices[addr] = 1; + } + + close(fd); + } + + return (LIBUSB_SUCCESS); +} + +int +obsd_open(struct libusb_device_handle *handle) +{ + struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv; + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + char devnode[16]; + + if (dpriv->devname) { + /* + * Only open ugen(4) attached devices read-write, all + * read-only operations are done through the bus node. + */ + snprintf(devnode, sizeof(devnode), DEVPATH "%s.00", + dpriv->devname); + dpriv->fd = open(devnode, O_RDWR); + if (dpriv->fd < 0) + return _errno_to_libusb(errno); + + usbi_dbg("open %s: fd %d", devnode, dpriv->fd); + } + + return (LIBUSB_SUCCESS); +} + +void +obsd_close(struct libusb_device_handle *handle) +{ + struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv; + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + + if (dpriv->devname) { + usbi_dbg("close: fd %d", dpriv->fd); + + close(dpriv->fd); + dpriv->fd = -1; + } +} + +int +obsd_get_device_descriptor(struct libusb_device *dev, unsigned char *buf, + int *host_endian) +{ + struct device_priv *dpriv = (struct device_priv *)dev->os_priv; + + usbi_dbg(""); + + memcpy(buf, &dpriv->ddesc, DEVICE_DESC_LENGTH); + + *host_endian = 0; + + return (LIBUSB_SUCCESS); +} + +int +obsd_get_active_config_descriptor(struct libusb_device *dev, + unsigned char *buf, size_t len, int *host_endian) +{ + struct device_priv *dpriv = (struct device_priv *)dev->os_priv; + usb_config_descriptor_t *ucd = (usb_config_descriptor_t *)dpriv->cdesc; + + len = MIN(len, UGETW(ucd->wTotalLength)); + + usbi_dbg("len %d", len); + + memcpy(buf, dpriv->cdesc, len); + + *host_endian = 0; + + return (len); +} + +int +obsd_get_config_descriptor(struct libusb_device *dev, uint8_t idx, + unsigned char *buf, size_t len, int *host_endian) +{ + struct usb_device_fdesc udf; + int fd, err; + + if ((fd = _bus_open(dev->bus_number)) < 0) + return _errno_to_libusb(errno); + + udf.udf_bus = dev->bus_number; + udf.udf_addr = dev->device_address; + udf.udf_config_index = idx; + udf.udf_size = len; + udf.udf_data = buf; + + usbi_dbg("index %d, len %d", udf.udf_config_index, len); + + if (ioctl(fd, USB_DEVICE_GET_FDESC, &udf) < 0) { + err = errno; + close(fd); + return _errno_to_libusb(err); + } + close(fd); + + *host_endian = 0; + + return (len); +} + +int +obsd_get_configuration(struct libusb_device_handle *handle, int *config) +{ + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + usb_config_descriptor_t *ucd = (usb_config_descriptor_t *)dpriv->cdesc; + + *config = ucd->bConfigurationValue; + + usbi_dbg("bConfigurationValue %d", *config); + + return (LIBUSB_SUCCESS); +} + +int +obsd_set_configuration(struct libusb_device_handle *handle, int config) +{ + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + + if (dpriv->devname == NULL) + return (LIBUSB_ERROR_NOT_SUPPORTED); + + usbi_dbg("bConfigurationValue %d", config); + + if (ioctl(dpriv->fd, USB_SET_CONFIG, &config) < 0) + return _errno_to_libusb(errno); + + return _cache_active_config_descriptor(handle->dev); +} + +int +obsd_claim_interface(struct libusb_device_handle *handle, int iface) +{ + struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv; + int i; + + for (i = 0; i < USB_MAX_ENDPOINTS; i++) + hpriv->endpoints[i] = -1; + + return (LIBUSB_SUCCESS); +} + +int +obsd_release_interface(struct libusb_device_handle *handle, int iface) +{ + struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv; + int i; + + for (i = 0; i < USB_MAX_ENDPOINTS; i++) + if (hpriv->endpoints[i] >= 0) + close(hpriv->endpoints[i]); + + return (LIBUSB_SUCCESS); +} + +int +obsd_set_interface_altsetting(struct libusb_device_handle *handle, int iface, + int altsetting) +{ + struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv; + struct usb_alt_interface intf; + + if (dpriv->devname == NULL) + return (LIBUSB_ERROR_NOT_SUPPORTED); + + usbi_dbg("iface %d, setting %d", iface, altsetting); + + memset(&intf, 0, sizeof(intf)); + + intf.uai_interface_index = iface; + intf.uai_alt_no = altsetting; + + if (ioctl(dpriv->fd, USB_SET_ALTINTERFACE, &intf) < 0) + return _errno_to_libusb(errno); + + return (LIBUSB_SUCCESS); +} + +int +obsd_clear_halt(struct libusb_device_handle *handle, unsigned char endpoint) +{ + struct usb_ctl_request req; + int fd, err; + + if ((fd = _bus_open(handle->dev->bus_number)) < 0) + return _errno_to_libusb(errno); + + usbi_dbg(""); + + req.ucr_addr = handle->dev->device_address; + req.ucr_request.bmRequestType = UT_WRITE_ENDPOINT; + req.ucr_request.bRequest = UR_CLEAR_FEATURE; + USETW(req.ucr_request.wValue, UF_ENDPOINT_HALT); + USETW(req.ucr_request.wIndex, endpoint); + USETW(req.ucr_request.wLength, 0); + + if (ioctl(fd, USB_REQUEST, &req) < 0) { + err = errno; + close(fd); + return _errno_to_libusb(err); + } + close(fd); + + return (LIBUSB_SUCCESS); +} + +int +obsd_reset_device(struct libusb_device_handle *handle) +{ + usbi_dbg(""); + + return (LIBUSB_ERROR_NOT_SUPPORTED); +} + +void +obsd_destroy_device(struct libusb_device *dev) +{ + struct device_priv *dpriv = (struct device_priv *)dev->os_priv; + + usbi_dbg(""); + + free(dpriv->cdesc); + free(dpriv->devname); +} + +int +obsd_submit_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer; + struct handle_priv *hpriv; + int err = 0; + + usbi_dbg(""); + + transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + hpriv = (struct handle_priv *)transfer->dev_handle->os_priv; + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + err = _sync_control_transfer(itransfer); + break; + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + if (IS_XFEROUT(transfer)) { + /* Isochronous write is not supported */ + err = LIBUSB_ERROR_NOT_SUPPORTED; + break; + } + err = _sync_gen_transfer(itransfer); + break; + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + if (IS_XFEROUT(transfer) && + transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) { + err = LIBUSB_ERROR_NOT_SUPPORTED; + break; + } + err = _sync_gen_transfer(itransfer); + break; + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + err = LIBUSB_ERROR_NOT_SUPPORTED; + break; + } + + if (err) + return (err); + + usbi_signal_transfer_completion(itransfer); + + return (LIBUSB_SUCCESS); +} + +int +obsd_cancel_transfer(struct usbi_transfer *itransfer) +{ + usbi_dbg(""); + + return (LIBUSB_ERROR_NOT_SUPPORTED); +} + +void +obsd_clear_transfer_priv(struct usbi_transfer *itransfer) +{ + usbi_dbg(""); + + /* Nothing to do */ +} + +int +obsd_handle_transfer_completion(struct usbi_transfer *itransfer) +{ + return usbi_handle_transfer_completion(itransfer, LIBUSB_TRANSFER_COMPLETED); +} + +int +obsd_clock_gettime(int clkid, struct timespec *tp) +{ + usbi_dbg("clock %d", clkid); + + if (clkid == USBI_CLOCK_REALTIME) + return clock_gettime(CLOCK_REALTIME, tp); + + if (clkid == USBI_CLOCK_MONOTONIC) + return clock_gettime(CLOCK_MONOTONIC, tp); + + return (LIBUSB_ERROR_INVALID_PARAM); +} + +int +_errno_to_libusb(int err) +{ + usbi_dbg("error: %s (%d)", strerror(err), err); + + switch (err) { + case EIO: + return (LIBUSB_ERROR_IO); + case EACCES: + return (LIBUSB_ERROR_ACCESS); + case ENOENT: + return (LIBUSB_ERROR_NO_DEVICE); + case ENOMEM: + return (LIBUSB_ERROR_NO_MEM); + case ETIMEDOUT: + return (LIBUSB_ERROR_TIMEOUT); + } + + return (LIBUSB_ERROR_OTHER); +} + +int +_cache_active_config_descriptor(struct libusb_device *dev) +{ + struct device_priv *dpriv = (struct device_priv *)dev->os_priv; + struct usb_device_cdesc udc; + struct usb_device_fdesc udf; + unsigned char* buf; + int fd, len, err; + + if ((fd = _bus_open(dev->bus_number)) < 0) + return _errno_to_libusb(errno); + + usbi_dbg("fd %d, addr %d", fd, dev->device_address); + + udc.udc_bus = dev->bus_number; + udc.udc_addr = dev->device_address; + udc.udc_config_index = USB_CURRENT_CONFIG_INDEX; + if (ioctl(fd, USB_DEVICE_GET_CDESC, &udc) < 0) { + err = errno; + close(fd); + return _errno_to_libusb(errno); + } + + usbi_dbg("active bLength %d", udc.udc_desc.bLength); + + len = UGETW(udc.udc_desc.wTotalLength); + buf = malloc(len); + if (buf == NULL) + return (LIBUSB_ERROR_NO_MEM); + + udf.udf_bus = dev->bus_number; + udf.udf_addr = dev->device_address; + udf.udf_config_index = udc.udc_config_index; + udf.udf_size = len; + udf.udf_data = buf; + + usbi_dbg("index %d, len %d", udf.udf_config_index, len); + + if (ioctl(fd, USB_DEVICE_GET_FDESC, &udf) < 0) { + err = errno; + close(fd); + free(buf); + return _errno_to_libusb(err); + } + close(fd); + + if (dpriv->cdesc) + free(dpriv->cdesc); + dpriv->cdesc = buf; + + return (LIBUSB_SUCCESS); +} + +int +_sync_control_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer; + struct libusb_control_setup *setup; + struct device_priv *dpriv; + struct usb_ctl_request req; + + transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + dpriv = (struct device_priv *)transfer->dev_handle->dev->os_priv; + setup = (struct libusb_control_setup *)transfer->buffer; + + usbi_dbg("type %x request %x value %x index %d length %d timeout %d", + setup->bmRequestType, setup->bRequest, + libusb_le16_to_cpu(setup->wValue), + libusb_le16_to_cpu(setup->wIndex), + libusb_le16_to_cpu(setup->wLength), transfer->timeout); + + req.ucr_addr = transfer->dev_handle->dev->device_address; + req.ucr_request.bmRequestType = setup->bmRequestType; + req.ucr_request.bRequest = setup->bRequest; + /* Don't use USETW, libusb already deals with the endianness */ + (*(uint16_t *)req.ucr_request.wValue) = setup->wValue; + (*(uint16_t *)req.ucr_request.wIndex) = setup->wIndex; + (*(uint16_t *)req.ucr_request.wLength) = setup->wLength; + req.ucr_data = transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE; + + if ((transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) == 0) + req.ucr_flags = USBD_SHORT_XFER_OK; + + if (dpriv->devname == NULL) { + /* + * XXX If the device is not attached to ugen(4) it is + * XXX still possible to submit a control transfer but + * XXX with the default timeout only. + */ + int fd, err; + + if ((fd = _bus_open(transfer->dev_handle->dev->bus_number)) < 0) + return _errno_to_libusb(errno); + + if ((ioctl(fd, USB_REQUEST, &req)) < 0) { + err = errno; + close(fd); + return _errno_to_libusb(err); + } + close(fd); + } else { + if ((ioctl(dpriv->fd, USB_SET_TIMEOUT, &transfer->timeout)) < 0) + return _errno_to_libusb(errno); + + if ((ioctl(dpriv->fd, USB_DO_REQUEST, &req)) < 0) + return _errno_to_libusb(errno); + } + + itransfer->transferred = req.ucr_actlen; + + usbi_dbg("transferred %d", itransfer->transferred); + + return (0); +} + +int +_access_endpoint(struct libusb_transfer *transfer) +{ + struct handle_priv *hpriv; + struct device_priv *dpriv; + char devnode[16]; + int fd, endpt; + mode_t mode; + + hpriv = (struct handle_priv *)transfer->dev_handle->os_priv; + dpriv = (struct device_priv *)transfer->dev_handle->dev->os_priv; + + endpt = UE_GET_ADDR(transfer->endpoint); + mode = IS_XFERIN(transfer) ? O_RDONLY : O_WRONLY; + + usbi_dbg("endpoint %d mode %d", endpt, mode); + + if (hpriv->endpoints[endpt] < 0) { + /* Pick the right endpoint node */ + snprintf(devnode, sizeof(devnode), DEVPATH "%s.%02d", + dpriv->devname, endpt); + + /* We may need to read/write to the same endpoint later. */ + if (((fd = open(devnode, O_RDWR)) < 0) && (errno == ENXIO)) + if ((fd = open(devnode, mode)) < 0) + return (-1); + + hpriv->endpoints[endpt] = fd; + } + + return (hpriv->endpoints[endpt]); +} + +int +_sync_gen_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer; + struct device_priv *dpriv; + int fd, nr = 1; + + transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + dpriv = (struct device_priv *)transfer->dev_handle->dev->os_priv; + + if (dpriv->devname == NULL) + return (LIBUSB_ERROR_NOT_SUPPORTED); + + /* + * Bulk, Interrupt or Isochronous transfer depends on the + * endpoint and thus the node to open. + */ + if ((fd = _access_endpoint(transfer)) < 0) + return _errno_to_libusb(errno); + + if ((ioctl(fd, USB_SET_TIMEOUT, &transfer->timeout)) < 0) + return _errno_to_libusb(errno); + + if (IS_XFERIN(transfer)) { + if ((transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) == 0) + if ((ioctl(fd, USB_SET_SHORT_XFER, &nr)) < 0) + return _errno_to_libusb(errno); + + nr = read(fd, transfer->buffer, transfer->length); + } else { + nr = write(fd, transfer->buffer, transfer->length); + } + + if (nr < 0) + return _errno_to_libusb(errno); + + itransfer->transferred = nr; + + return (0); +} + +int +_bus_open(int number) +{ + char busnode[16]; + + snprintf(busnode, sizeof(busnode), USBDEV "%d", number); + + return open(busnode, O_RDWR); +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_posix.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_posix.c new file mode 100644 index 000000000..e2f55a57a --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_posix.c @@ -0,0 +1,53 @@ +/* + * poll_posix: poll compatibility wrapper for POSIX systems + * Copyright © 2013 RealVNC Ltd. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#include + +#include +#include +#include +#include + +#include "libusbi.h" + +int usbi_pipe(int pipefd[2]) +{ + int ret = pipe(pipefd); + if (ret != 0) { + return ret; + } + ret = fcntl(pipefd[1], F_GETFL); + if (ret == -1) { + usbi_dbg("Failed to get pipe fd flags: %d", errno); + goto err_close_pipe; + } + ret = fcntl(pipefd[1], F_SETFL, ret | O_NONBLOCK); + if (ret != 0) { + usbi_dbg("Failed to set non-blocking on new pipe: %d", errno); + goto err_close_pipe; + } + + return 0; + +err_close_pipe: + usbi_close(pipefd[0]); + usbi_close(pipefd[1]); + return ret; +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_posix.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_posix.h new file mode 100644 index 000000000..5b4b2c905 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_posix.h @@ -0,0 +1,11 @@ +#ifndef LIBUSB_POLL_POSIX_H +#define LIBUSB_POLL_POSIX_H + +#define usbi_write write +#define usbi_read read +#define usbi_close close +#define usbi_poll poll + +int usbi_pipe(int pipefd[2]); + +#endif /* LIBUSB_POLL_POSIX_H */ diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_windows.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_windows.c new file mode 100644 index 000000000..982560751 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_windows.c @@ -0,0 +1,728 @@ +/* + * poll_windows: poll compatibility wrapper for Windows + * Copyright © 2012-2013 RealVNC Ltd. + * Copyright © 2009-2010 Pete Batard + * With contributions from Michael Plante, Orin Eman et al. + * Parts of poll implementation from libusb-win32, by Stephan Meyer et al. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +/* + * poll() and pipe() Windows compatibility layer for libusb 1.0 + * + * The way this layer works is by using OVERLAPPED with async I/O transfers, as + * OVERLAPPED have an associated event which is flagged for I/O completion. + * + * For USB pollable async I/O, you would typically: + * - obtain a Windows HANDLE to a file or device that has been opened in + * OVERLAPPED mode + * - call usbi_create_fd with this handle to obtain a custom fd. + * Note that if you need simultaneous R/W access, you need to call create_fd + * twice, once in RW_READ and once in RW_WRITE mode to obtain 2 separate + * pollable fds + * - leave the core functions call the poll routine and flag POLLIN/POLLOUT + * + * The pipe pollable synchronous I/O works using the overlapped event associated + * with a fake pipe. The read/write functions are only meant to be used in that + * context. + */ +#include + +#include +#include +#include + +#include "libusbi.h" + +// Uncomment to debug the polling layer +//#define DEBUG_POLL_WINDOWS +#if defined(DEBUG_POLL_WINDOWS) +#define poll_dbg usbi_dbg +#else +// MSVC++ < 2005 cannot use a variadic argument and non MSVC +// compilers produce warnings if parenthesis are omitted. +#if defined(_MSC_VER) && (_MSC_VER < 1400) +#define poll_dbg +#else +#define poll_dbg(...) +#endif +#endif + +#if defined(_PREFAST_) +#pragma warning(disable:28719) +#endif + +#define CHECK_INIT_POLLING do {if(!is_polling_set) init_polling();} while(0) + +// public fd data +const struct winfd INVALID_WINFD = {-1, INVALID_HANDLE_VALUE, NULL, NULL, NULL, RW_NONE}; +struct winfd poll_fd[MAX_FDS]; +// internal fd data +struct { + CRITICAL_SECTION mutex; // lock for fds + // Additional variables for XP CancelIoEx partial emulation + HANDLE original_handle; + DWORD thread_id; +} _poll_fd[MAX_FDS]; + +// globals +BOOLEAN is_polling_set = FALSE; +LONG pipe_number = 0; +static volatile LONG compat_spinlock = 0; + +#if !defined(_WIN32_WCE) +// CancelIoEx, available on Vista and later only, provides the ability to cancel +// a single transfer (OVERLAPPED) when used. As it may not be part of any of the +// platform headers, we hook into the Kernel32 system DLL directly to seek it. +static BOOL (__stdcall *pCancelIoEx)(HANDLE, LPOVERLAPPED) = NULL; +#define Use_Duplicate_Handles (pCancelIoEx == NULL) + +static inline void setup_cancel_io(void) +{ + HMODULE hKernel32 = GetModuleHandleA("KERNEL32"); + if (hKernel32 != NULL) { + pCancelIoEx = (BOOL (__stdcall *)(HANDLE,LPOVERLAPPED)) + GetProcAddress(hKernel32, "CancelIoEx"); + } + usbi_dbg("Will use CancelIo%s for I/O cancellation", + Use_Duplicate_Handles?"":"Ex"); +} + +static inline BOOL cancel_io(int _index) +{ + if ((_index < 0) || (_index >= MAX_FDS)) { + return FALSE; + } + + if ( (poll_fd[_index].fd < 0) || (poll_fd[_index].handle == INVALID_HANDLE_VALUE) + || (poll_fd[_index].handle == 0) || (poll_fd[_index].overlapped == NULL) ) { + return TRUE; + } + if (poll_fd[_index].itransfer && poll_fd[_index].cancel_fn) { + // Cancel outstanding transfer via the specific callback + (*poll_fd[_index].cancel_fn)(poll_fd[_index].itransfer); + return TRUE; + } + if (pCancelIoEx != NULL) { + return (*pCancelIoEx)(poll_fd[_index].handle, poll_fd[_index].overlapped); + } + if (_poll_fd[_index].thread_id == GetCurrentThreadId()) { + return CancelIo(poll_fd[_index].handle); + } + usbi_warn(NULL, "Unable to cancel I/O that was started from another thread"); + return FALSE; +} +#else +#define Use_Duplicate_Handles FALSE + +static __inline void setup_cancel_io() +{ + // No setup needed on WinCE +} + +static __inline BOOL cancel_io(int _index) +{ + if ((_index < 0) || (_index >= MAX_FDS)) { + return FALSE; + } + if ( (poll_fd[_index].fd < 0) || (poll_fd[_index].handle == INVALID_HANDLE_VALUE) + || (poll_fd[_index].handle == 0) || (poll_fd[_index].overlapped == NULL) ) { + return TRUE; + } + if (poll_fd[_index].itransfer && poll_fd[_index].cancel_fn) { + // Cancel outstanding transfer via the specific callback + (*poll_fd[_index].cancel_fn)(poll_fd[_index].itransfer); + } + return TRUE; +} +#endif + +// Init +void init_polling(void) +{ + int i; + + while (InterlockedExchange((LONG *)&compat_spinlock, 1) == 1) { + SleepEx(0, TRUE); + } + if (!is_polling_set) { + setup_cancel_io(); + for (i=0; ihEvent = CreateEvent(NULL, TRUE, FALSE, NULL); + if(overlapped->hEvent == NULL) { + free (overlapped); + return NULL; + } + return overlapped; +} + +static void free_overlapped(OVERLAPPED *overlapped) +{ + if (overlapped == NULL) + return; + + if ( (overlapped->hEvent != 0) + && (overlapped->hEvent != INVALID_HANDLE_VALUE) ) { + CloseHandle(overlapped->hEvent); + } + free(overlapped); +} + +void exit_polling(void) +{ + int i; + + while (InterlockedExchange((LONG *)&compat_spinlock, 1) == 1) { + SleepEx(0, TRUE); + } + if (is_polling_set) { + is_polling_set = FALSE; + + for (i=0; iInternal = STATUS_PENDING; + overlapped->InternalHigh = 0; + + for (i=0; i= 0) { + LeaveCriticalSection(&_poll_fd[i].mutex); + continue; + } + + // Use index as the unique fd number + poll_fd[i].fd = i; + // Read end of the "pipe" + filedes[0] = poll_fd[i].fd; + // We can use the same handle for both ends + filedes[1] = filedes[0]; + + poll_fd[i].handle = DUMMY_HANDLE; + poll_fd[i].overlapped = overlapped; + // There's no polling on the write end, so we just use READ for our needs + poll_fd[i].rw = RW_READ; + _poll_fd[i].original_handle = INVALID_HANDLE_VALUE; + LeaveCriticalSection(&_poll_fd[i].mutex); + return 0; + } + } + free_overlapped(overlapped); + return -1; +} + +/* + * Create both an fd and an OVERLAPPED from an open Windows handle, so that + * it can be used with our polling function + * The handle MUST support overlapped transfers (usually requires CreateFile + * with FILE_FLAG_OVERLAPPED) + * Return a pollable file descriptor struct, or INVALID_WINFD on error + * + * Note that the fd returned by this function is a per-transfer fd, rather + * than a per-session fd and cannot be used for anything else but our + * custom functions (the fd itself points to the NUL: device) + * if you plan to do R/W on the same handle, you MUST create 2 fds: one for + * read and one for write. Using a single R/W fd is unsupported and will + * produce unexpected results + */ +struct winfd usbi_create_fd(HANDLE handle, int access_mode, struct usbi_transfer *itransfer, cancel_transfer *cancel_fn) +{ + int i; + struct winfd wfd = INVALID_WINFD; + OVERLAPPED* overlapped = NULL; + + CHECK_INIT_POLLING; + + if ((handle == 0) || (handle == INVALID_HANDLE_VALUE)) { + return INVALID_WINFD; + } + + wfd.itransfer = itransfer; + wfd.cancel_fn = cancel_fn; + + if ((access_mode != RW_READ) && (access_mode != RW_WRITE)) { + usbi_warn(NULL, "only one of RW_READ or RW_WRITE are supported. " + "If you want to poll for R/W simultaneously, create multiple fds from the same handle."); + return INVALID_WINFD; + } + if (access_mode == RW_READ) { + wfd.rw = RW_READ; + } else { + wfd.rw = RW_WRITE; + } + + overlapped = create_overlapped(); + if(overlapped == NULL) { + return INVALID_WINFD; + } + + for (i=0; i= 0) { + LeaveCriticalSection(&_poll_fd[i].mutex); + continue; + } + // Use index as the unique fd number + wfd.fd = i; + // Attempt to emulate some of the CancelIoEx behaviour on platforms + // that don't have it + if (Use_Duplicate_Handles) { + _poll_fd[i].thread_id = GetCurrentThreadId(); + if (!DuplicateHandle(GetCurrentProcess(), handle, GetCurrentProcess(), + &wfd.handle, 0, TRUE, DUPLICATE_SAME_ACCESS)) { + usbi_dbg("could not duplicate handle for CancelIo - using original one"); + wfd.handle = handle; + // Make sure we won't close the original handle on fd deletion then + _poll_fd[i].original_handle = INVALID_HANDLE_VALUE; + } else { + _poll_fd[i].original_handle = handle; + } + } else { + wfd.handle = handle; + } + wfd.overlapped = overlapped; + memcpy(&poll_fd[i], &wfd, sizeof(struct winfd)); + LeaveCriticalSection(&_poll_fd[i].mutex); + return wfd; + } + } + free_overlapped(overlapped); + return INVALID_WINFD; +} + +static void _free_index(int _index) +{ + // Cancel any async IO (Don't care about the validity of our handles for this) + cancel_io(_index); + // close the duplicate handle (if we have an actual duplicate) + if (Use_Duplicate_Handles) { + if (_poll_fd[_index].original_handle != INVALID_HANDLE_VALUE) { + CloseHandle(poll_fd[_index].handle); + } + _poll_fd[_index].original_handle = INVALID_HANDLE_VALUE; + _poll_fd[_index].thread_id = 0; + } + free_overlapped(poll_fd[_index].overlapped); + poll_fd[_index] = INVALID_WINFD; +} + +/* + * Release a pollable file descriptor. + * + * Note that the associated Windows handle is not closed by this call + */ +void usbi_free_fd(struct winfd *wfd) +{ + int _index; + + CHECK_INIT_POLLING; + + _index = _fd_to_index_and_lock(wfd->fd); + if (_index < 0) { + return; + } + _free_index(_index); + *wfd = INVALID_WINFD; + LeaveCriticalSection(&_poll_fd[_index].mutex); +} + +/* + * The functions below perform various conversions between fd, handle and OVERLAPPED + */ +struct winfd fd_to_winfd(int fd) +{ + int i; + struct winfd wfd; + + CHECK_INIT_POLLING; + + if (fd < 0) + return INVALID_WINFD; + + for (i=0; i= 0) { + LeaveCriticalSection(&_poll_fd[_index].mutex); + } + usbi_warn(NULL, "invalid fd"); + triggered = -1; + goto poll_exit; + } + + // IN or OUT must match our fd direction + if ((fds[i].events & POLLIN) && (poll_fd[_index].rw != RW_READ)) { + fds[i].revents |= POLLNVAL | POLLERR; + errno = EBADF; + usbi_warn(NULL, "attempted POLLIN on fd without READ access"); + LeaveCriticalSection(&_poll_fd[_index].mutex); + triggered = -1; + goto poll_exit; + } + + if ((fds[i].events & POLLOUT) && (poll_fd[_index].rw != RW_WRITE)) { + fds[i].revents |= POLLNVAL | POLLERR; + errno = EBADF; + usbi_warn(NULL, "attempted POLLOUT on fd without WRITE access"); + LeaveCriticalSection(&_poll_fd[_index].mutex); + triggered = -1; + goto poll_exit; + } + + // The following macro only works if overlapped I/O was reported pending + if ( (HasOverlappedIoCompleted(poll_fd[_index].overlapped)) + || (HasOverlappedIoCompletedSync(poll_fd[_index].overlapped)) ) { + poll_dbg(" completed"); + // checks above should ensure this works: + fds[i].revents = fds[i].events; + triggered++; + } else { + handles_to_wait_on[nb_handles_to_wait_on] = poll_fd[_index].overlapped->hEvent; + handle_to_index[nb_handles_to_wait_on] = i; + nb_handles_to_wait_on++; + } + LeaveCriticalSection(&_poll_fd[_index].mutex); + } + + // If nothing was triggered, wait on all fds that require it + if ((timeout != 0) && (triggered == 0) && (nb_handles_to_wait_on != 0)) { + if (timeout < 0) { + poll_dbg("starting infinite wait for %u handles...", (unsigned int)nb_handles_to_wait_on); + } else { + poll_dbg("starting %d ms wait for %u handles...", timeout, (unsigned int)nb_handles_to_wait_on); + } + ret = WaitForMultipleObjects(nb_handles_to_wait_on, handles_to_wait_on, + FALSE, (timeout<0)?INFINITE:(DWORD)timeout); + object_index = ret-WAIT_OBJECT_0; + if ((object_index >= 0) && ((DWORD)object_index < nb_handles_to_wait_on)) { + poll_dbg(" completed after wait"); + i = handle_to_index[object_index]; + _index = _fd_to_index_and_lock(fds[i].fd); + fds[i].revents = fds[i].events; + triggered++; + if (_index >= 0) { + LeaveCriticalSection(&_poll_fd[_index].mutex); + } + } else if (ret == WAIT_TIMEOUT) { + poll_dbg(" timed out"); + triggered = 0; // 0 = timeout + } else { + errno = EIO; + triggered = -1; // error + } + } + +poll_exit: + if (handles_to_wait_on != NULL) { + free(handles_to_wait_on); + } + if (handle_to_index != NULL) { + free(handle_to_index); + } + return triggered; +} + +/* + * close a fake pipe fd + */ +int usbi_close(int fd) +{ + int _index; + int r = -1; + + CHECK_INIT_POLLING; + + _index = _fd_to_index_and_lock(fd); + + if (_index < 0) { + errno = EBADF; + } else { + free_overlapped(poll_fd[_index].overlapped); + poll_fd[_index] = INVALID_WINFD; + LeaveCriticalSection(&_poll_fd[_index].mutex); + } + return r; +} + +/* + * synchronous write for fake "pipe" signaling + */ +ssize_t usbi_write(int fd, const void *buf, size_t count) +{ + int _index; + UNUSED(buf); + + CHECK_INIT_POLLING; + + if (count != sizeof(unsigned char)) { + usbi_err(NULL, "this function should only used for signaling"); + return -1; + } + + _index = _fd_to_index_and_lock(fd); + + if ( (_index < 0) || (poll_fd[_index].overlapped == NULL) ) { + errno = EBADF; + if (_index >= 0) { + LeaveCriticalSection(&_poll_fd[_index].mutex); + } + return -1; + } + + poll_dbg("set pipe event (fd = %d, thread = %08X)", _index, (unsigned int)GetCurrentThreadId()); + SetEvent(poll_fd[_index].overlapped->hEvent); + poll_fd[_index].overlapped->Internal = STATUS_WAIT_0; + // If two threads write on the pipe at the same time, we need to + // process two separate reads => use the overlapped as a counter + poll_fd[_index].overlapped->InternalHigh++; + + LeaveCriticalSection(&_poll_fd[_index].mutex); + return sizeof(unsigned char); +} + +/* + * synchronous read for fake "pipe" signaling + */ +ssize_t usbi_read(int fd, void *buf, size_t count) +{ + int _index; + ssize_t r = -1; + UNUSED(buf); + + CHECK_INIT_POLLING; + + if (count != sizeof(unsigned char)) { + usbi_err(NULL, "this function should only used for signaling"); + return -1; + } + + _index = _fd_to_index_and_lock(fd); + + if (_index < 0) { + errno = EBADF; + return -1; + } + + if (WaitForSingleObject(poll_fd[_index].overlapped->hEvent, INFINITE) != WAIT_OBJECT_0) { + usbi_warn(NULL, "waiting for event failed: %u", (unsigned int)GetLastError()); + errno = EIO; + goto out; + } + + poll_dbg("clr pipe event (fd = %d, thread = %08X)", _index, (unsigned int)GetCurrentThreadId()); + poll_fd[_index].overlapped->InternalHigh--; + // Don't reset unless we don't have any more events to process + if (poll_fd[_index].overlapped->InternalHigh <= 0) { + ResetEvent(poll_fd[_index].overlapped->hEvent); + poll_fd[_index].overlapped->Internal = STATUS_PENDING; + } + + r = sizeof(unsigned char); + +out: + LeaveCriticalSection(&_poll_fd[_index].mutex); + return r; +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_windows.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_windows.h new file mode 100644 index 000000000..aa4c985da --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/poll_windows.h @@ -0,0 +1,131 @@ +/* + * Windows compat: POSIX compatibility wrapper + * Copyright © 2012-2013 RealVNC Ltd. + * Copyright © 2009-2010 Pete Batard + * With contributions from Michael Plante, Orin Eman et al. + * Parts of poll implementation from libusb-win32, by Stephan Meyer et al. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + */ +#pragma once + +#if defined(_MSC_VER) +// disable /W4 MSVC warnings that are benign +#pragma warning(disable:4127) // conditional expression is constant +#endif + +// Handle synchronous completion through the overlapped structure +#if !defined(STATUS_REPARSE) // reuse the REPARSE status code +#define STATUS_REPARSE ((LONG)0x00000104L) +#endif +#define STATUS_COMPLETED_SYNCHRONOUSLY STATUS_REPARSE +#if defined(_WIN32_WCE) +// WinCE doesn't have a HasOverlappedIoCompleted() macro, so attempt to emulate it +#define HasOverlappedIoCompleted(lpOverlapped) (((DWORD)(lpOverlapped)->Internal) != STATUS_PENDING) +#endif +#define HasOverlappedIoCompletedSync(lpOverlapped) (((DWORD)(lpOverlapped)->Internal) == STATUS_COMPLETED_SYNCHRONOUSLY) + +#define DUMMY_HANDLE ((HANDLE)(LONG_PTR)-2) + +/* Windows versions */ +enum windows_version { + WINDOWS_CE = -2, + WINDOWS_UNDEFINED = -1, + WINDOWS_UNSUPPORTED = 0, + WINDOWS_XP = 0x51, + WINDOWS_2003 = 0x52, // Also XP x64 + WINDOWS_VISTA = 0x60, + WINDOWS_7 = 0x61, + WINDOWS_8 = 0x62, + WINDOWS_8_1_OR_LATER = 0x63, + WINDOWS_MAX +}; +extern int windows_version; + +#define MAX_FDS 256 + +#define POLLIN 0x0001 /* There is data to read */ +#define POLLPRI 0x0002 /* There is urgent data to read */ +#define POLLOUT 0x0004 /* Writing now will not block */ +#define POLLERR 0x0008 /* Error condition */ +#define POLLHUP 0x0010 /* Hung up */ +#define POLLNVAL 0x0020 /* Invalid request: fd not open */ + +struct pollfd { + int fd; /* file descriptor */ + short events; /* requested events */ + short revents; /* returned events */ +}; + +// access modes +enum rw_type { + RW_NONE, + RW_READ, + RW_WRITE, +}; + +// fd struct that can be used for polling on Windows +typedef int cancel_transfer(struct usbi_transfer *itransfer); + +struct winfd { + int fd; // what's exposed to libusb core + HANDLE handle; // what we need to attach overlapped to the I/O op, so we can poll it + OVERLAPPED* overlapped; // what will report our I/O status + struct usbi_transfer *itransfer; // Associated transfer, or NULL if completed + cancel_transfer *cancel_fn; // Function pointer to cancel transfer API + enum rw_type rw; // I/O transfer direction: read *XOR* write (NOT BOTH) +}; +extern const struct winfd INVALID_WINFD; + +int usbi_pipe(int pipefd[2]); +int usbi_poll(struct pollfd *fds, unsigned int nfds, int timeout); +ssize_t usbi_write(int fd, const void *buf, size_t count); +ssize_t usbi_read(int fd, void *buf, size_t count); +int usbi_close(int fd); + +void init_polling(void); +void exit_polling(void); +struct winfd usbi_create_fd(HANDLE handle, int access_mode, + struct usbi_transfer *transfer, cancel_transfer *cancel_fn); +void usbi_free_fd(struct winfd* winfd); +struct winfd fd_to_winfd(int fd); +struct winfd handle_to_winfd(HANDLE handle); +struct winfd overlapped_to_winfd(OVERLAPPED* overlapped); + +/* + * Timeval operations + */ +#if defined(DDKBUILD) +#include // defines timeval functions on DDK +#endif + +#if !defined(TIMESPEC_TO_TIMEVAL) +#define TIMESPEC_TO_TIMEVAL(tv, ts) { \ + (tv)->tv_sec = (long)(ts)->tv_sec; \ + (tv)->tv_usec = (long)(ts)->tv_nsec / 1000; \ +} +#endif +#if !defined(timersub) +#define timersub(a, b, result) \ +do { \ + (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ + (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ + if ((result)->tv_usec < 0) { \ + --(result)->tv_sec; \ + (result)->tv_usec += 1000000; \ + } \ +} while (0) +#endif diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/sunos_usb.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/sunos_usb.c new file mode 100644 index 000000000..cb608976b --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/sunos_usb.c @@ -0,0 +1,1292 @@ +/* + * + * Copyright (c) 2016, Oracle and/or its affiliates. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "libusbi.h" +#include "sunos_usb.h" + +/* + * Backend functions + */ +static int sunos_init(struct libusb_context *); +static void sunos_exit(void); +static int sunos_get_device_list(struct libusb_context *, + struct discovered_devs **); +static int sunos_open(struct libusb_device_handle *); +static void sunos_close(struct libusb_device_handle *); +static int sunos_get_device_descriptor(struct libusb_device *, + uint8_t*, int *); +static int sunos_get_active_config_descriptor(struct libusb_device *, + uint8_t*, size_t, int *); +static int sunos_get_config_descriptor(struct libusb_device *, uint8_t, + uint8_t*, size_t, int *); +static int sunos_get_configuration(struct libusb_device_handle *, int *); +static int sunos_set_configuration(struct libusb_device_handle *, int); +static int sunos_claim_interface(struct libusb_device_handle *, int); +static int sunos_release_interface(struct libusb_device_handle *, int); +static int sunos_set_interface_altsetting(struct libusb_device_handle *, + int, int); +static int sunos_clear_halt(struct libusb_device_handle *, uint8_t); +static int sunos_reset_device(struct libusb_device_handle *); +static void sunos_destroy_device(struct libusb_device *); +static int sunos_submit_transfer(struct usbi_transfer *); +static int sunos_cancel_transfer(struct usbi_transfer *); +static void sunos_clear_transfer_priv(struct usbi_transfer *); +static int sunos_handle_transfer_completion(struct usbi_transfer *); +static int sunos_clock_gettime(int, struct timespec *); + +/* + * Private functions + */ +static int _errno_to_libusb(int); +static int sunos_usb_get_status(int fd); + +static int sunos_init(struct libusb_context *ctx) +{ + return (LIBUSB_SUCCESS); +} + +static void sunos_exit(void) +{ + usbi_dbg(""); +} + +static int +sunos_fill_in_dev_info(di_node_t node, struct libusb_device *dev) +{ + int proplen; + int n, *addr, *port_prop; + char *phypath; + uint8_t *rdata; + struct libusb_device_descriptor *descr; + sunos_dev_priv_t *dpriv = (sunos_dev_priv_t *)dev->os_priv; + + /* Device descriptors */ + proplen = di_prop_lookup_bytes(DDI_DEV_T_ANY, node, + "usb-dev-descriptor", &rdata); + if (proplen <= 0) { + + return (LIBUSB_ERROR_IO); + } + + descr = (struct libusb_device_descriptor *)rdata; + bcopy(descr, &dpriv->dev_descr, LIBUSB_DT_DEVICE_SIZE); + dpriv->dev_descr.bcdUSB = libusb_cpu_to_le16(descr->bcdUSB); + dpriv->dev_descr.idVendor = libusb_cpu_to_le16(descr->idVendor); + dpriv->dev_descr.idProduct = libusb_cpu_to_le16(descr->idProduct); + dpriv->dev_descr.bcdDevice = libusb_cpu_to_le16(descr->bcdDevice); + + /* Raw configuration descriptors */ + proplen = di_prop_lookup_bytes(DDI_DEV_T_ANY, node, + "usb-raw-cfg-descriptors", &rdata); + if (proplen <= 0) { + usbi_dbg("can't find raw config descriptors"); + + return (LIBUSB_ERROR_IO); + } + dpriv->raw_cfgdescr = calloc(1, proplen); + if (dpriv->raw_cfgdescr == NULL) { + return (LIBUSB_ERROR_NO_MEM); + } else { + bcopy(rdata, dpriv->raw_cfgdescr, proplen); + dpriv->cfgvalue = ((struct libusb_config_descriptor *) + rdata)->bConfigurationValue; + } + + n = di_prop_lookup_ints(DDI_DEV_T_ANY, node, "reg", &port_prop); + + if ((n != 1) || (*port_prop <= 0)) { + return (LIBUSB_ERROR_IO); + } + dev->port_number = *port_prop; + + /* device physical path */ + phypath = di_devfs_path(node); + if (phypath) { + dpriv->phypath = strdup(phypath); + di_devfs_path_free(phypath); + } else { + free(dpriv->raw_cfgdescr); + + return (LIBUSB_ERROR_IO); + } + + /* address */ + n = di_prop_lookup_ints(DDI_DEV_T_ANY, node, "assigned-address", &addr); + if (n != 1 || *addr == 0) { + usbi_dbg("can't get address"); + } else { + dev->device_address = *addr; + } + + /* speed */ + if (di_prop_exists(DDI_DEV_T_ANY, node, "low-speed") == 1) { + dev->speed = LIBUSB_SPEED_LOW; + } else if (di_prop_exists(DDI_DEV_T_ANY, node, "high-speed") == 1) { + dev->speed = LIBUSB_SPEED_HIGH; + } else if (di_prop_exists(DDI_DEV_T_ANY, node, "full-speed") == 1) { + dev->speed = LIBUSB_SPEED_FULL; + } else if (di_prop_exists(DDI_DEV_T_ANY, node, "super-speed") == 1) { + dev->speed = LIBUSB_SPEED_SUPER; + } + + usbi_dbg("vid=%x pid=%x, path=%s, bus_nmber=0x%x, port_number=%d, " + "speed=%d", dpriv->dev_descr.idVendor, dpriv->dev_descr.idProduct, + dpriv->phypath, dev->bus_number, dev->port_number, dev->speed); + + return (LIBUSB_SUCCESS); +} + + +static int +sunos_add_devices(di_devlink_t link, void *arg) +{ + struct devlink_cbarg *largs = (struct devlink_cbarg *)arg; + struct node_args *nargs; + di_node_t myself, pnode; + uint64_t session_id = 0; + uint16_t bdf = 0; + struct libusb_device *dev; + sunos_dev_priv_t *devpriv; + const char *path, *newpath; + int n, i; + int *addr_prop; + uint8_t bus_number = 0; + + nargs = (struct node_args *)largs->nargs; + myself = largs->myself; + if (nargs->last_ugenpath) { + /* the same node's links */ + return (DI_WALK_CONTINUE); + } + + /* + * Construct session ID. + * session ID = ...parent hub addr|hub addr|dev addr. + */ + pnode = myself; + i = 0; + while (pnode != DI_NODE_NIL) { + if (di_prop_exists(DDI_DEV_T_ANY, pnode, "root-hub") == 1) { + /* walk to root */ + uint32_t *regbuf = NULL; + uint32_t reg; + + n = di_prop_lookup_ints(DDI_DEV_T_ANY, pnode, "reg", + (int **)®buf); + reg = regbuf[0]; + bdf = (PCI_REG_BUS_G(reg) << 8) | + (PCI_REG_DEV_G(reg) << 3) | PCI_REG_FUNC_G(reg); + session_id |= (bdf << i * 8); + + /* same as 'unit-address' property */ + bus_number = + (PCI_REG_DEV_G(reg) << 3) | PCI_REG_FUNC_G(reg); + + usbi_dbg("device bus address=%s:%x", + di_bus_addr(pnode), bus_number); + + break; + } + + /* usb_addr */ + n = di_prop_lookup_ints(DDI_DEV_T_ANY, pnode, + "assigned-address", &addr_prop); + if ((n != 1) || (addr_prop[0] == 0)) { + usbi_dbg("cannot get valid usb_addr"); + + return (DI_WALK_CONTINUE); + } + + session_id |= ((addr_prop[0] & 0xff) << i * 8); + if (++i > 7) + break; + + pnode = di_parent_node(pnode); + } + + path = di_devlink_path(link); + dev = usbi_get_device_by_session_id(nargs->ctx, session_id); + if (dev == NULL) { + dev = usbi_alloc_device(nargs->ctx, session_id); + if (dev == NULL) { + usbi_dbg("can't alloc device"); + + return (DI_WALK_TERMINATE); + } + devpriv = (sunos_dev_priv_t *)dev->os_priv; + if ((newpath = strrchr(path, '/')) == NULL) { + libusb_unref_device(dev); + + return (DI_WALK_TERMINATE); + } + devpriv->ugenpath = strndup(path, strlen(path) - + strlen(newpath)); + dev->bus_number = bus_number; + + if (sunos_fill_in_dev_info(myself, dev) != LIBUSB_SUCCESS) { + libusb_unref_device(dev); + + return (DI_WALK_TERMINATE); + } + if (usbi_sanitize_device(dev) < 0) { + libusb_unref_device(dev); + usbi_dbg("sanatize failed: "); + return (DI_WALK_TERMINATE); + } + } else { + usbi_dbg("Dev %s exists", path); + } + + devpriv = (sunos_dev_priv_t *)dev->os_priv; + if (nargs->last_ugenpath == NULL) { + /* first device */ + nargs->last_ugenpath = devpriv->ugenpath; + + if (discovered_devs_append(*(nargs->discdevs), dev) == NULL) { + usbi_dbg("cannot append device"); + } + + /* + * we alloc and hence ref this dev. We don't need to ref it + * hereafter. Front end or app should take care of their ref. + */ + libusb_unref_device(dev); + } + + usbi_dbg("Device %s %s id=0x%llx, devcount:%d, bdf=%x", + devpriv->ugenpath, path, (uint64_t)session_id, + (*nargs->discdevs)->len, bdf); + + return (DI_WALK_CONTINUE); +} + +static int +sunos_walk_minor_node_link(di_node_t node, void *args) +{ + di_minor_t minor = DI_MINOR_NIL; + char *minor_path; + struct devlink_cbarg arg; + struct node_args *nargs = (struct node_args *)args; + di_devlink_handle_t devlink_hdl = nargs->dlink_hdl; + + /* walk each minor to find ugen devices */ + while ((minor = di_minor_next(node, minor)) != DI_MINOR_NIL) { + minor_path = di_devfs_minor_path(minor); + arg.nargs = args; + arg.myself = node; + arg.minor = minor; + (void) di_devlink_walk(devlink_hdl, + "^usb/[0-9a-f]+[.][0-9a-f]+", minor_path, + DI_PRIMARY_LINK, (void *)&arg, sunos_add_devices); + di_devfs_path_free(minor_path); + } + + /* switch to a different node */ + nargs->last_ugenpath = NULL; + + return (DI_WALK_CONTINUE); +} + +int +sunos_get_device_list(struct libusb_context * ctx, + struct discovered_devs **discdevs) +{ + di_node_t root_node; + struct node_args args; + di_devlink_handle_t devlink_hdl; + + args.ctx = ctx; + args.discdevs = discdevs; + args.last_ugenpath = NULL; + if ((root_node = di_init("/", DINFOCPYALL)) == DI_NODE_NIL) { + usbi_dbg("di_int() failed: %s", strerror(errno)); + return (LIBUSB_ERROR_IO); + } + + if ((devlink_hdl = di_devlink_init(NULL, 0)) == NULL) { + di_fini(root_node); + usbi_dbg("di_devlink_init() failed: %s", strerror(errno)); + + return (LIBUSB_ERROR_IO); + } + args.dlink_hdl = devlink_hdl; + + /* walk each node to find USB devices */ + if (di_walk_node(root_node, DI_WALK_SIBFIRST, &args, + sunos_walk_minor_node_link) == -1) { + usbi_dbg("di_walk_node() failed: %s", strerror(errno)); + di_fini(root_node); + + return (LIBUSB_ERROR_IO); + } + + di_fini(root_node); + di_devlink_fini(&devlink_hdl); + + usbi_dbg("%d devices", (*discdevs)->len); + + return ((*discdevs)->len); +} + +static int +sunos_usb_open_ep0(sunos_dev_handle_priv_t *hpriv, sunos_dev_priv_t *dpriv) +{ + char filename[PATH_MAX + 1]; + + if (hpriv->eps[0].datafd > 0) { + + return (LIBUSB_SUCCESS); + } + snprintf(filename, PATH_MAX, "%s/cntrl0", dpriv->ugenpath); + + usbi_dbg("opening %s", filename); + hpriv->eps[0].datafd = open(filename, O_RDWR); + if (hpriv->eps[0].datafd < 0) { + return(_errno_to_libusb(errno)); + } + + snprintf(filename, PATH_MAX, "%s/cntrl0stat", dpriv->ugenpath); + hpriv->eps[0].statfd = open(filename, O_RDONLY); + if (hpriv->eps[0].statfd < 0) { + close(hpriv->eps[0].datafd); + hpriv->eps[0].datafd = -1; + + return(_errno_to_libusb(errno)); + } + + return (LIBUSB_SUCCESS); +} + +static void +sunos_usb_close_all_eps(sunos_dev_handle_priv_t *hdev) +{ + int i; + + /* not close ep0 */ + for (i = 1; i < USB_MAXENDPOINTS; i++) { + if (hdev->eps[i].datafd != -1) { + (void) close(hdev->eps[i].datafd); + hdev->eps[i].datafd = -1; + } + if (hdev->eps[i].statfd != -1) { + (void) close(hdev->eps[i].statfd); + hdev->eps[i].statfd = -1; + } + } +} + +static void +sunos_usb_close_ep0(sunos_dev_handle_priv_t *hdev, sunos_dev_priv_t *dpriv) +{ + if (hdev->eps[0].datafd >= 0) { + close(hdev->eps[0].datafd); + close(hdev->eps[0].statfd); + hdev->eps[0].datafd = -1; + hdev->eps[0].statfd = -1; + } +} + +static uchar_t +sunos_usb_ep_index(uint8_t ep_addr) +{ + return ((ep_addr & LIBUSB_ENDPOINT_ADDRESS_MASK) + + ((ep_addr & LIBUSB_ENDPOINT_DIR_MASK) ? 16 : 0)); +} + +static int +sunos_find_interface(struct libusb_device_handle *hdev, + uint8_t endpoint, uint8_t *interface) +{ + struct libusb_config_descriptor *config; + int r; + int iface_idx; + + r = libusb_get_active_config_descriptor(hdev->dev, &config); + if (r < 0) { + return (LIBUSB_ERROR_INVALID_PARAM); + } + + for (iface_idx = 0; iface_idx < config->bNumInterfaces; iface_idx++) { + const struct libusb_interface *iface = + &config->interface[iface_idx]; + int altsetting_idx; + + for (altsetting_idx = 0; altsetting_idx < iface->num_altsetting; + altsetting_idx++) { + const struct libusb_interface_descriptor *altsetting = + &iface->altsetting[altsetting_idx]; + int ep_idx; + + for (ep_idx = 0; ep_idx < altsetting->bNumEndpoints; + ep_idx++) { + const struct libusb_endpoint_descriptor *ep = + &altsetting->endpoint[ep_idx]; + if (ep->bEndpointAddress == endpoint) { + *interface = iface_idx; + libusb_free_config_descriptor(config); + + return (LIBUSB_SUCCESS); + } + } + } + } + libusb_free_config_descriptor(config); + + return (LIBUSB_ERROR_INVALID_PARAM); +} + +static int +sunos_check_device_and_status_open(struct libusb_device_handle *hdl, + uint8_t ep_addr, int ep_type) +{ + char filename[PATH_MAX + 1], statfilename[PATH_MAX + 1]; + char cfg_num[16], alt_num[16]; + int fd, fdstat, mode; + uint8_t ifc = 0; + uint8_t ep_index; + sunos_dev_handle_priv_t *hpriv; + + usbi_dbg("open ep 0x%02x", ep_addr); + hpriv = (sunos_dev_handle_priv_t *)hdl->os_priv; + ep_index = sunos_usb_ep_index(ep_addr); + /* ep already opened */ + if ((hpriv->eps[ep_index].datafd > 0) && + (hpriv->eps[ep_index].statfd > 0)) { + usbi_dbg("ep 0x%02x already opened, return success", + ep_addr); + + return (0); + } + + if (sunos_find_interface(hdl, ep_addr, &ifc) < 0) { + usbi_dbg("can't find interface for endpoint 0x%02x", + ep_addr); + + return (LIBUSB_ERROR_ACCESS); + } + + /* create filename */ + if (hpriv->config_index > 0) { + (void) snprintf(cfg_num, sizeof (cfg_num), "cfg%d", + hpriv->config_index + 1); + } else { + bzero(cfg_num, sizeof (cfg_num)); + } + + if (hpriv->altsetting[ifc] > 0) { + (void) snprintf(alt_num, sizeof (alt_num), ".%d", + hpriv->altsetting[ifc]); + } else { + bzero(alt_num, sizeof (alt_num)); + } + + (void) snprintf(filename, PATH_MAX, "%s/%sif%d%s%s%d", + hpriv->dpriv->ugenpath, cfg_num, ifc, alt_num, + (ep_addr & LIBUSB_ENDPOINT_DIR_MASK) ? "in" : + "out", (ep_addr & LIBUSB_ENDPOINT_ADDRESS_MASK)); + (void) snprintf(statfilename, PATH_MAX, "%sstat", filename); + + /* + * for interrupt IN endpoints, we need to enable one xfer + * mode before opening the endpoint + */ + if ((ep_type == LIBUSB_TRANSFER_TYPE_INTERRUPT) && + (ep_addr & LIBUSB_ENDPOINT_IN)) { + char control = USB_EP_INTR_ONE_XFER; + int count; + + /* open the status device node for the ep first RDWR */ + if ((fdstat = open(statfilename, O_RDWR)) == -1) { + usbi_dbg("can't open %s RDWR: %d", + statfilename, errno); + } else { + count = write(fdstat, &control, sizeof (control)); + if (count != 1) { + /* this should have worked */ + usbi_dbg("can't write to %s: %d", + statfilename, errno); + (void) close(fdstat); + + return (errno); + } + /* close status node and open xfer node first */ + close (fdstat); + } + } + + /* open the xfer node first in case alt needs to be changed */ + if (ep_type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS) { + mode = O_RDWR; + } else if (ep_addr & LIBUSB_ENDPOINT_IN) { + mode = O_RDONLY; + } else { + mode = O_WRONLY; + } + + /* + * IMPORTANT: must open data xfer node first and then open stat node + * Otherwise, it will fail on multi-config or multi-altsetting devices + * with "Device Busy" error. See ugen_epxs_switch_cfg_alt() and + * ugen_epxs_check_alt_switch() in ugen driver source code. + */ + if ((fd = open(filename, mode)) == -1) { + usbi_dbg("can't open %s: %d(%s)", filename, errno, + strerror(errno)); + + return (errno); + } + /* open the status node */ + if ((fdstat = open(statfilename, O_RDONLY)) == -1) { + usbi_dbg("can't open %s: %d", statfilename, errno); + + (void) close(fd); + + return (errno); + } + + hpriv->eps[ep_index].datafd = fd; + hpriv->eps[ep_index].statfd = fdstat; + usbi_dbg("ep=0x%02x datafd=%d, statfd=%d", ep_addr, fd, fdstat); + + return (0); +} + +int +sunos_open(struct libusb_device_handle *handle) +{ + sunos_dev_handle_priv_t *hpriv; + sunos_dev_priv_t *dpriv; + int i; + int ret; + + hpriv = (sunos_dev_handle_priv_t *)handle->os_priv; + dpriv = (sunos_dev_priv_t *)handle->dev->os_priv; + hpriv->dpriv = dpriv; + + /* set all file descriptors to "closed" */ + for (i = 0; i < USB_MAXENDPOINTS; i++) { + hpriv->eps[i].datafd = -1; + hpriv->eps[i].statfd = -1; + } + + if ((ret = sunos_usb_open_ep0(hpriv, dpriv)) != LIBUSB_SUCCESS) { + usbi_dbg("fail: %d", ret); + return (ret); + } + + return (LIBUSB_SUCCESS); +} + +void +sunos_close(struct libusb_device_handle *handle) +{ + sunos_dev_handle_priv_t *hpriv; + sunos_dev_priv_t *dpriv; + + usbi_dbg(""); + if (!handle) { + return; + } + + hpriv = (sunos_dev_handle_priv_t *)handle->os_priv; + if (!hpriv) { + return; + } + dpriv = (sunos_dev_priv_t *)handle->dev->os_priv; + if (!dpriv) { + return; + } + + sunos_usb_close_all_eps(hpriv); + sunos_usb_close_ep0(hpriv, dpriv); +} + +int +sunos_get_device_descriptor(struct libusb_device *dev, uint8_t *buf, + int *host_endian) +{ + sunos_dev_priv_t *dpriv = (sunos_dev_priv_t *)dev->os_priv; + + memcpy(buf, &dpriv->dev_descr, LIBUSB_DT_DEVICE_SIZE); + *host_endian = 0; + + return (LIBUSB_SUCCESS); +} + +int +sunos_get_active_config_descriptor(struct libusb_device *dev, + uint8_t *buf, size_t len, int *host_endian) +{ + sunos_dev_priv_t *dpriv = (sunos_dev_priv_t *)dev->os_priv; + struct libusb_config_descriptor *cfg; + int proplen; + di_node_t node; + uint8_t *rdata; + + /* + * Keep raw configuration descriptors updated, in case config + * has ever been changed through setCfg. + */ + if ((node = di_init(dpriv->phypath, DINFOCPYALL)) == DI_NODE_NIL) { + usbi_dbg("di_int() failed: %s", strerror(errno)); + return (LIBUSB_ERROR_IO); + } + proplen = di_prop_lookup_bytes(DDI_DEV_T_ANY, node, + "usb-raw-cfg-descriptors", &rdata); + if (proplen <= 0) { + usbi_dbg("can't find raw config descriptors"); + + return (LIBUSB_ERROR_IO); + } + dpriv->raw_cfgdescr = realloc(dpriv->raw_cfgdescr, proplen); + if (dpriv->raw_cfgdescr == NULL) { + return (LIBUSB_ERROR_NO_MEM); + } else { + bcopy(rdata, dpriv->raw_cfgdescr, proplen); + dpriv->cfgvalue = ((struct libusb_config_descriptor *) + rdata)->bConfigurationValue; + } + di_fini(node); + + cfg = (struct libusb_config_descriptor *)dpriv->raw_cfgdescr; + len = MIN(len, libusb_le16_to_cpu(cfg->wTotalLength)); + memcpy(buf, dpriv->raw_cfgdescr, len); + *host_endian = 0; + usbi_dbg("path:%s len %d", dpriv->phypath, len); + + return (len); +} + +int +sunos_get_config_descriptor(struct libusb_device *dev, uint8_t idx, + uint8_t *buf, size_t len, int *host_endian) +{ + /* XXX */ + return(sunos_get_active_config_descriptor(dev, buf, len, host_endian)); +} + +int +sunos_get_configuration(struct libusb_device_handle *handle, int *config) +{ + sunos_dev_priv_t *dpriv = (sunos_dev_priv_t *)handle->dev->os_priv; + + *config = dpriv->cfgvalue; + + usbi_dbg("bConfigurationValue %d", *config); + + return (LIBUSB_SUCCESS); +} + +int +sunos_set_configuration(struct libusb_device_handle *handle, int config) +{ + sunos_dev_priv_t *dpriv = (sunos_dev_priv_t *)handle->dev->os_priv; + sunos_dev_handle_priv_t *hpriv; + + usbi_dbg("bConfigurationValue %d", config); + hpriv = (sunos_dev_handle_priv_t *)handle->os_priv; + + if (dpriv->ugenpath == NULL) + return (LIBUSB_ERROR_NOT_SUPPORTED); + + if (config < 1 || config > dpriv->dev_descr.bNumConfigurations) + return (LIBUSB_ERROR_INVALID_PARAM); + + dpriv->cfgvalue = config; + hpriv->config_index = config - 1; + + return (LIBUSB_SUCCESS); +} + +int +sunos_claim_interface(struct libusb_device_handle *handle, int iface) +{ + usbi_dbg("iface %d", iface); + if (iface < 0) { + return (LIBUSB_ERROR_INVALID_PARAM); + } + + return (LIBUSB_SUCCESS); +} + +int +sunos_release_interface(struct libusb_device_handle *handle, int iface) +{ + sunos_dev_handle_priv_t *hpriv = + (sunos_dev_handle_priv_t *)handle->os_priv; + + usbi_dbg("iface %d", iface); + if (iface < 0) { + return (LIBUSB_ERROR_INVALID_PARAM); + } + + /* XXX: can we release it? */ + hpriv->altsetting[iface] = 0; + + return (LIBUSB_SUCCESS); +} + +int +sunos_set_interface_altsetting(struct libusb_device_handle *handle, int iface, + int altsetting) +{ + sunos_dev_priv_t *dpriv = (sunos_dev_priv_t *)handle->dev->os_priv; + sunos_dev_handle_priv_t *hpriv = + (sunos_dev_handle_priv_t *)handle->os_priv; + + usbi_dbg("iface %d, setting %d", iface, altsetting); + + if (iface < 0 || altsetting < 0) { + return (LIBUSB_ERROR_INVALID_PARAM); + } + if (dpriv->ugenpath == NULL) + return (LIBUSB_ERROR_NOT_FOUND); + + /* XXX: can we switch altsetting? */ + hpriv->altsetting[iface] = altsetting; + + return (LIBUSB_SUCCESS); +} + +static void +usb_dump_data(unsigned char *data, size_t size) +{ + int i; + + if (getenv("LIBUSB_DEBUG") == NULL) { + return; + } + + (void) fprintf(stderr, "data dump:"); + for (i = 0; i < size; i++) { + if (i % 16 == 0) { + (void) fprintf(stderr, "\n%08x ", i); + } + (void) fprintf(stderr, "%02x ", (uchar_t)data[i]); + } + (void) fprintf(stderr, "\n"); +} + +static void +sunos_async_callback(union sigval arg) +{ + struct sunos_transfer_priv *tpriv = + (struct sunos_transfer_priv *)arg.sival_ptr; + struct libusb_transfer *xfer = tpriv->transfer; + struct aiocb *aiocb = &tpriv->aiocb; + int ret; + sunos_dev_handle_priv_t *hpriv; + uint8_t ep; + + hpriv = (sunos_dev_handle_priv_t *)xfer->dev_handle->os_priv; + ep = sunos_usb_ep_index(xfer->endpoint); + + ret = aio_error(aiocb); + if (ret != 0) { + xfer->status = sunos_usb_get_status(hpriv->eps[ep].statfd); + } else { + xfer->actual_length = + LIBUSB_TRANSFER_TO_USBI_TRANSFER(xfer)->transferred = + aio_return(aiocb); + } + + usb_dump_data(xfer->buffer, xfer->actual_length); + + usbi_dbg("ret=%d, len=%d, actual_len=%d", ret, xfer->length, + xfer->actual_length); + + /* async notification */ + usbi_signal_transfer_completion(LIBUSB_TRANSFER_TO_USBI_TRANSFER(xfer)); +} + +static int +sunos_do_async_io(struct libusb_transfer *transfer) +{ + int ret = -1; + struct aiocb *aiocb; + sunos_dev_handle_priv_t *hpriv; + uint8_t ep; + struct sunos_transfer_priv *tpriv; + + usbi_dbg(""); + + tpriv = usbi_transfer_get_os_priv(LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer)); + hpriv = (sunos_dev_handle_priv_t *)transfer->dev_handle->os_priv; + ep = sunos_usb_ep_index(transfer->endpoint); + + tpriv->transfer = transfer; + aiocb = &tpriv->aiocb; + bzero(aiocb, sizeof (*aiocb)); + aiocb->aio_fildes = hpriv->eps[ep].datafd; + aiocb->aio_buf = transfer->buffer; + aiocb->aio_nbytes = transfer->length; + aiocb->aio_lio_opcode = + ((transfer->endpoint & LIBUSB_ENDPOINT_DIR_MASK) == + LIBUSB_ENDPOINT_IN) ? LIO_READ:LIO_WRITE; + aiocb->aio_sigevent.sigev_notify = SIGEV_THREAD; + aiocb->aio_sigevent.sigev_value.sival_ptr = tpriv; + aiocb->aio_sigevent.sigev_notify_function = sunos_async_callback; + + if (aiocb->aio_lio_opcode == LIO_READ) { + ret = aio_read(aiocb); + } else { + ret = aio_write(aiocb); + } + + return (ret); +} + +/* return the number of bytes read/written */ +static int +usb_do_io(int fd, int stat_fd, char *data, size_t size, int flag, int *status) +{ + int error; + int ret = -1; + + usbi_dbg("usb_do_io(): datafd=%d statfd=%d size=0x%x flag=%s", + fd, stat_fd, size, flag? "WRITE":"READ"); + + switch (flag) { + case READ: + errno = 0; + ret = read(fd, data, size); + usb_dump_data(data, size); + break; + case WRITE: + usb_dump_data(data, size); + errno = 0; + ret = write(fd, data, size); + break; + } + + usbi_dbg("usb_do_io(): amount=%d", ret); + + if (ret < 0) { + int save_errno = errno; + + usbi_dbg("TID=%x io %s errno=%d(%s) ret=%d", pthread_self(), + flag?"WRITE":"READ", errno, strerror(errno), ret); + + /* sunos_usb_get_status will do a read and overwrite errno */ + error = sunos_usb_get_status(stat_fd); + usbi_dbg("io status=%d errno=%d(%s)", error, + save_errno, strerror(save_errno)); + + if (status) { + *status = save_errno; + } + + return (save_errno); + + } else if (status) { + *status = 0; + } + + return (ret); +} + +static int +solaris_submit_ctrl_on_default(struct libusb_transfer *transfer) +{ + int ret = -1, setup_ret; + int status; + sunos_dev_handle_priv_t *hpriv; + struct libusb_device_handle *hdl = transfer->dev_handle; + uint16_t wLength; + uint8_t *data = transfer->buffer; + + hpriv = (sunos_dev_handle_priv_t *)hdl->os_priv; + wLength = transfer->length - LIBUSB_CONTROL_SETUP_SIZE; + + if (hpriv->eps[0].datafd == -1) { + usbi_dbg("ep0 not opened"); + + return (LIBUSB_ERROR_NOT_FOUND); + } + + if ((data[0] & LIBUSB_ENDPOINT_DIR_MASK) == LIBUSB_ENDPOINT_IN) { + usbi_dbg("IN request"); + ret = usb_do_io(hpriv->eps[0].datafd, + hpriv->eps[0].statfd, (char *)data, LIBUSB_CONTROL_SETUP_SIZE, + WRITE, (int *)&status); + } else { + usbi_dbg("OUT request"); + ret = usb_do_io(hpriv->eps[0].datafd, hpriv->eps[0].statfd, + transfer->buffer, transfer->length, WRITE, + (int *)&transfer->status); + } + + setup_ret = ret; + if (ret < LIBUSB_CONTROL_SETUP_SIZE) { + usbi_dbg("error sending control msg: %d", ret); + + return (LIBUSB_ERROR_IO); + } + + ret = transfer->length - LIBUSB_CONTROL_SETUP_SIZE; + + /* Read the remaining bytes for IN request */ + if ((wLength) && ((data[0] & LIBUSB_ENDPOINT_DIR_MASK) == + LIBUSB_ENDPOINT_IN)) { + usbi_dbg("DATA: %d", transfer->length - setup_ret); + ret = usb_do_io(hpriv->eps[0].datafd, + hpriv->eps[0].statfd, + (char *)transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE, + wLength, READ, (int *)&transfer->status); + } + + if (ret >= 0) { + transfer->actual_length = ret; + LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer)->transferred = ret; + } + usbi_dbg("Done: ctrl data bytes %d", ret); + + /* sync transfer handling */ + ret = usbi_handle_transfer_completion(LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer), + transfer->status); + + return (ret); +} + +int +sunos_clear_halt(struct libusb_device_handle *handle, uint8_t endpoint) +{ + int ret; + + usbi_dbg("endpoint=0x%02x", endpoint); + + ret = libusb_control_transfer(handle, LIBUSB_ENDPOINT_OUT | + LIBUSB_RECIPIENT_ENDPOINT | LIBUSB_REQUEST_TYPE_STANDARD, + LIBUSB_REQUEST_CLEAR_FEATURE, 0, endpoint, NULL, 0, 1000); + + usbi_dbg("ret=%d", ret); + + return (ret); +} + +int +sunos_reset_device(struct libusb_device_handle *handle) +{ + usbi_dbg(""); + + return (LIBUSB_ERROR_NOT_SUPPORTED); +} + +void +sunos_destroy_device(struct libusb_device *dev) +{ + sunos_dev_priv_t *dpriv = (sunos_dev_priv_t *)dev->os_priv; + + usbi_dbg(""); + + free(dpriv->raw_cfgdescr); + free(dpriv->ugenpath); + free(dpriv->phypath); +} + +int +sunos_submit_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer; + struct libusb_device_handle *hdl; + int err = 0; + + transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + hdl = transfer->dev_handle; + + err = sunos_check_device_and_status_open(hdl, + transfer->endpoint, transfer->type); + if (err < 0) { + + return (_errno_to_libusb(err)); + } + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + /* sync transfer */ + usbi_dbg("CTRL transfer: %d", transfer->length); + err = solaris_submit_ctrl_on_default(transfer); + break; + + case LIBUSB_TRANSFER_TYPE_BULK: + /* fallthru */ + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + if (transfer->type == LIBUSB_TRANSFER_TYPE_BULK) + usbi_dbg("BULK transfer: %d", transfer->length); + else + usbi_dbg("INTR transfer: %d", transfer->length); + err = sunos_do_async_io(transfer); + break; + + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + /* Isochronous/Stream is not supported */ + + /* fallthru */ + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + if (transfer->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS) + usbi_dbg("ISOC transfer: %d", transfer->length); + else + usbi_dbg("BULK STREAM transfer: %d", transfer->length); + err = LIBUSB_ERROR_NOT_SUPPORTED; + break; + } + + return (err); +} + +int +sunos_cancel_transfer(struct usbi_transfer *itransfer) +{ + sunos_xfer_priv_t *tpriv; + sunos_dev_handle_priv_t *hpriv; + struct libusb_transfer *transfer; + struct aiocb *aiocb; + uint8_t ep; + int ret; + + tpriv = usbi_transfer_get_os_priv(itransfer); + aiocb = &tpriv->aiocb; + transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + hpriv = (sunos_dev_handle_priv_t *)transfer->dev_handle->os_priv; + ep = sunos_usb_ep_index(transfer->endpoint); + + ret = aio_cancel(hpriv->eps[ep].datafd, aiocb); + + usbi_dbg("aio->fd=%d fd=%d ret = %d, %s", aiocb->aio_fildes, + hpriv->eps[ep].datafd, ret, (ret == AIO_CANCELED)? + strerror(0):strerror(errno)); + + if (ret != AIO_CANCELED) { + ret = _errno_to_libusb(errno); + } else { + /* + * we don't need to call usbi_handle_transfer_cancellation(), + * because we'll handle everything in sunos_async_callback. + */ + ret = LIBUSB_SUCCESS; + } + + return (ret); +} + +void +sunos_clear_transfer_priv(struct usbi_transfer *itransfer) +{ + usbi_dbg(""); + + /* Nothing to do */ +} + +int +sunos_handle_transfer_completion(struct usbi_transfer *itransfer) +{ + return usbi_handle_transfer_completion(itransfer, LIBUSB_TRANSFER_COMPLETED); +} + +int +sunos_clock_gettime(int clkid, struct timespec *tp) +{ + usbi_dbg("clock %d", clkid); + + if (clkid == USBI_CLOCK_REALTIME) + return clock_gettime(CLOCK_REALTIME, tp); + + if (clkid == USBI_CLOCK_MONOTONIC) + return clock_gettime(CLOCK_MONOTONIC, tp); + + return (LIBUSB_ERROR_INVALID_PARAM); +} + +int +_errno_to_libusb(int err) +{ + usbi_dbg("error: %s (%d)", strerror(err), err); + + switch (err) { + case EIO: + return (LIBUSB_ERROR_IO); + case EACCES: + return (LIBUSB_ERROR_ACCESS); + case ENOENT: + return (LIBUSB_ERROR_NO_DEVICE); + case ENOMEM: + return (LIBUSB_ERROR_NO_MEM); + case ETIMEDOUT: + return (LIBUSB_ERROR_TIMEOUT); + } + + return (LIBUSB_ERROR_OTHER); +} + +/* + * sunos_usb_get_status: + * gets status of endpoint + * + * Returns: ugen's last cmd status + */ +static int +sunos_usb_get_status(int fd) +{ + int status, ret; + + usbi_dbg("sunos_usb_get_status(): fd=%d", fd); + + ret = read(fd, &status, sizeof (status)); + if (ret == sizeof (status)) { + switch (status) { + case USB_LC_STAT_NOERROR: + usbi_dbg("No Error"); + break; + case USB_LC_STAT_CRC: + usbi_dbg("CRC Timeout Detected\n"); + break; + case USB_LC_STAT_BITSTUFFING: + usbi_dbg("Bit Stuffing Violation\n"); + break; + case USB_LC_STAT_DATA_TOGGLE_MM: + usbi_dbg("Data Toggle Mismatch\n"); + break; + case USB_LC_STAT_STALL: + usbi_dbg("End Point Stalled\n"); + break; + case USB_LC_STAT_DEV_NOT_RESP: + usbi_dbg("Device is Not Responding\n"); + break; + case USB_LC_STAT_PID_CHECKFAILURE: + usbi_dbg("PID Check Failure\n"); + break; + case USB_LC_STAT_UNEXP_PID: + usbi_dbg("Unexpected PID\n"); + break; + case USB_LC_STAT_DATA_OVERRUN: + usbi_dbg("Data Exceeded Size\n"); + break; + case USB_LC_STAT_DATA_UNDERRUN: + usbi_dbg("Less data received\n"); + break; + case USB_LC_STAT_BUFFER_OVERRUN: + usbi_dbg("Buffer Size Exceeded\n"); + break; + case USB_LC_STAT_BUFFER_UNDERRUN: + usbi_dbg("Buffer Underrun\n"); + break; + case USB_LC_STAT_TIMEOUT: + usbi_dbg("Command Timed Out\n"); + break; + case USB_LC_STAT_NOT_ACCESSED: + usbi_dbg("Not Accessed by h/w\n"); + break; + case USB_LC_STAT_UNSPECIFIED_ERR: + usbi_dbg("Unspecified Error\n"); + break; + case USB_LC_STAT_NO_BANDWIDTH: + usbi_dbg("No Bandwidth\n"); + break; + case USB_LC_STAT_HW_ERR: + usbi_dbg("Host Controller h/w Error\n"); + break; + case USB_LC_STAT_SUSPENDED: + usbi_dbg("Device was Suspended\n"); + break; + case USB_LC_STAT_DISCONNECTED: + usbi_dbg("Device was Disconnected\n"); + break; + case USB_LC_STAT_INTR_BUF_FULL: + usbi_dbg("Interrupt buffer was full\n"); + break; + case USB_LC_STAT_INVALID_REQ: + usbi_dbg("Request was Invalid\n"); + break; + case USB_LC_STAT_INTERRUPTED: + usbi_dbg("Request was Interrupted\n"); + break; + case USB_LC_STAT_NO_RESOURCES: + usbi_dbg("No resources available for " + "request\n"); + break; + case USB_LC_STAT_INTR_POLLING_FAILED: + usbi_dbg("Failed to Restart Poll"); + break; + default: + usbi_dbg("Error Not Determined %d\n", + status); + break; + } + } else { + usbi_dbg("read stat error: %s",strerror(errno)); + status = -1; + } + + return (status); +} + +const struct usbi_os_backend sunos_backend = { + .name = "Solaris", + .caps = 0, + .init = sunos_init, + .exit = sunos_exit, + .get_device_list = sunos_get_device_list, + .get_device_descriptor = sunos_get_device_descriptor, + .get_active_config_descriptor = sunos_get_active_config_descriptor, + .get_config_descriptor = sunos_get_config_descriptor, + .hotplug_poll = NULL, + .open = sunos_open, + .close = sunos_close, + .get_configuration = sunos_get_configuration, + .set_configuration = sunos_set_configuration, + + .claim_interface = sunos_claim_interface, + .release_interface = sunos_release_interface, + .set_interface_altsetting = sunos_set_interface_altsetting, + .clear_halt = sunos_clear_halt, + .reset_device = sunos_reset_device, /* TODO */ + .alloc_streams = NULL, + .free_streams = NULL, + .kernel_driver_active = NULL, + .detach_kernel_driver = NULL, + .attach_kernel_driver = NULL, + .destroy_device = sunos_destroy_device, + .submit_transfer = sunos_submit_transfer, + .cancel_transfer = sunos_cancel_transfer, + .handle_events = NULL, + .clear_transfer_priv = sunos_clear_transfer_priv, + .handle_transfer_completion = sunos_handle_transfer_completion, + .clock_gettime = sunos_clock_gettime, + .device_priv_size = sizeof(sunos_dev_priv_t), + .device_handle_priv_size = sizeof(sunos_dev_handle_priv_t), + .transfer_priv_size = sizeof(sunos_xfer_priv_t), +}; diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/sunos_usb.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/sunos_usb.h new file mode 100644 index 000000000..574166031 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/sunos_usb.h @@ -0,0 +1,74 @@ +/* + * + * Copyright (c) 2016, Oracle and/or its affiliates. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LIBUSB_SUNOS_H +#define LIBUSB_SUNOS_H + +#include +#include +#include "libusbi.h" + +#define READ 0 +#define WRITE 1 + +typedef struct sunos_device_priv { + uint8_t cfgvalue; /* active config value */ + uint8_t *raw_cfgdescr; /* active config descriptor */ + struct libusb_device_descriptor dev_descr; /* usb device descriptor */ + char *ugenpath; /* name of the ugen(4) node */ + char *phypath; /* physical path */ +} sunos_dev_priv_t; + +typedef struct endpoint { + int datafd; /* data file */ + int statfd; /* state file */ +} sunos_ep_priv_t; + +typedef struct sunos_device_handle_priv { + uint8_t altsetting[USB_MAXINTERFACES]; /* a interface's alt */ + uint8_t config_index; + sunos_ep_priv_t eps[USB_MAXENDPOINTS]; + sunos_dev_priv_t *dpriv; /* device private */ +} sunos_dev_handle_priv_t; + +typedef struct sunos_transfer_priv { + struct aiocb aiocb; + struct libusb_transfer *transfer; +} sunos_xfer_priv_t; + +struct node_args { + struct libusb_context *ctx; + struct discovered_devs **discdevs; + const char *last_ugenpath; + di_devlink_handle_t dlink_hdl; +}; + +struct devlink_cbarg { + struct node_args *nargs; /* di node walk arguments */ + di_node_t myself; /* the di node */ + di_minor_t minor; +}; + +/* AIO callback args */ +struct aio_callback_args{ + struct libusb_transfer *transfer; + struct aiocb aiocb; +}; + +#endif /* LIBUSB_SUNOS_H */ diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_posix.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_posix.c new file mode 100644 index 000000000..a4f270bbe --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_posix.c @@ -0,0 +1,79 @@ +/* + * libusb synchronization using POSIX Threads + * + * Copyright © 2011 Vitali Lovich + * Copyright © 2011 Peter Stuge + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#if defined(__linux__) || defined(__OpenBSD__) +# if defined(__OpenBSD__) +# define _BSD_SOURCE +# endif +# include +# include +#elif defined(__APPLE__) +# include +#elif defined(__CYGWIN__) +# include +#endif + +#include "threads_posix.h" +#include "libusbi.h" + +int usbi_cond_timedwait(pthread_cond_t *cond, + pthread_mutex_t *mutex, const struct timeval *tv) +{ + struct timespec timeout; + int r; + + r = usbi_backend->clock_gettime(USBI_CLOCK_REALTIME, &timeout); + if (r < 0) + return r; + + timeout.tv_sec += tv->tv_sec; + timeout.tv_nsec += tv->tv_usec * 1000; + while (timeout.tv_nsec >= 1000000000L) { + timeout.tv_nsec -= 1000000000L; + timeout.tv_sec++; + } + + return pthread_cond_timedwait(cond, mutex, &timeout); +} + +int usbi_get_tid(void) +{ + int ret = -1; +#if defined(__ANDROID__) + ret = gettid(); +#elif defined(__linux__) + ret = syscall(SYS_gettid); +#elif defined(__OpenBSD__) + /* The following only works with OpenBSD > 5.1 as it requires + real thread support. For 5.1 and earlier, -1 is returned. */ + ret = syscall(SYS_getthrid); +#elif defined(__APPLE__) + ret = mach_thread_self(); + mach_port_deallocate(mach_task_self(), ret); +#elif defined(__CYGWIN__) + ret = GetCurrentThreadId(); +#endif +/* TODO: NetBSD thread ID support */ + return ret; +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_posix.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_posix.h new file mode 100644 index 000000000..4c1514ea6 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_posix.h @@ -0,0 +1,55 @@ +/* + * libusb synchronization using POSIX Threads + * + * Copyright © 2010 Peter Stuge + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LIBUSB_THREADS_POSIX_H +#define LIBUSB_THREADS_POSIX_H + +#include +#ifdef HAVE_SYS_TIME_H +#include +#endif + +#define usbi_mutex_static_t pthread_mutex_t +#define USBI_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER +#define usbi_mutex_static_lock pthread_mutex_lock +#define usbi_mutex_static_unlock pthread_mutex_unlock + +#define usbi_mutex_t pthread_mutex_t +#define usbi_mutex_init(mutex) pthread_mutex_init((mutex), NULL) +#define usbi_mutex_lock pthread_mutex_lock +#define usbi_mutex_unlock pthread_mutex_unlock +#define usbi_mutex_trylock pthread_mutex_trylock +#define usbi_mutex_destroy pthread_mutex_destroy + +#define usbi_cond_t pthread_cond_t +#define usbi_cond_init(cond) pthread_cond_init((cond), NULL) +#define usbi_cond_wait pthread_cond_wait +#define usbi_cond_broadcast pthread_cond_broadcast +#define usbi_cond_destroy pthread_cond_destroy + +#define usbi_tls_key_t pthread_key_t +#define usbi_tls_key_create(key) pthread_key_create((key), NULL) +#define usbi_tls_key_get pthread_getspecific +#define usbi_tls_key_set pthread_setspecific +#define usbi_tls_key_delete pthread_key_delete + +int usbi_get_tid(void); + +#endif /* LIBUSB_THREADS_POSIX_H */ diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_windows.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_windows.c new file mode 100644 index 000000000..7c2e52dba --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_windows.c @@ -0,0 +1,259 @@ +/* + * libusb synchronization on Microsoft Windows + * + * Copyright © 2010 Michael Plante + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include + +#include "libusbi.h" + +struct usbi_cond_perthread { + struct list_head list; + DWORD tid; + HANDLE event; +}; + +int usbi_mutex_static_lock(usbi_mutex_static_t *mutex) +{ + if (!mutex) + return EINVAL; + while (InterlockedExchange(mutex, 1) == 1) + SleepEx(0, TRUE); + return 0; +} + +int usbi_mutex_static_unlock(usbi_mutex_static_t *mutex) +{ + if (!mutex) + return EINVAL; + InterlockedExchange(mutex, 0); + return 0; +} + +int usbi_mutex_init(usbi_mutex_t *mutex) +{ + if (!mutex) + return EINVAL; + *mutex = CreateMutex(NULL, FALSE, NULL); + if (!*mutex) + return ENOMEM; + return 0; +} + +int usbi_mutex_lock(usbi_mutex_t *mutex) +{ + DWORD result; + + if (!mutex) + return EINVAL; + result = WaitForSingleObject(*mutex, INFINITE); + if (result == WAIT_OBJECT_0 || result == WAIT_ABANDONED) + return 0; // acquired (ToDo: check that abandoned is ok) + else + return EINVAL; // don't know how this would happen + // so don't know proper errno +} + +int usbi_mutex_unlock(usbi_mutex_t *mutex) +{ + if (!mutex) + return EINVAL; + if (ReleaseMutex(*mutex)) + return 0; + else + return EPERM; +} + +int usbi_mutex_trylock(usbi_mutex_t *mutex) +{ + DWORD result; + + if (!mutex) + return EINVAL; + result = WaitForSingleObject(*mutex, 0); + if (result == WAIT_OBJECT_0 || result == WAIT_ABANDONED) + return 0; // acquired (ToDo: check that abandoned is ok) + else if (result == WAIT_TIMEOUT) + return EBUSY; + else + return EINVAL; // don't know how this would happen + // so don't know proper error +} + +int usbi_mutex_destroy(usbi_mutex_t *mutex) +{ + // It is not clear if CloseHandle failure is due to failure to unlock. + // If so, this should be errno=EBUSY. + if (!mutex || !CloseHandle(*mutex)) + return EINVAL; + *mutex = NULL; + return 0; +} + +int usbi_cond_init(usbi_cond_t *cond) +{ + if (!cond) + return EINVAL; + list_init(&cond->waiters); + list_init(&cond->not_waiting); + return 0; +} + +int usbi_cond_destroy(usbi_cond_t *cond) +{ + // This assumes no one is using this anymore. The check MAY NOT BE safe. + struct usbi_cond_perthread *pos, *next_pos; + + if(!cond) + return EINVAL; + if (!list_empty(&cond->waiters)) + return EBUSY; // (!see above!) + list_for_each_entry_safe(pos, next_pos, &cond->not_waiting, list, struct usbi_cond_perthread) { + CloseHandle(pos->event); + list_del(&pos->list); + free(pos); + } + return 0; +} + +int usbi_cond_broadcast(usbi_cond_t *cond) +{ + // Assumes mutex is locked; this is not in keeping with POSIX spec, but + // libusb does this anyway, so we simplify by not adding more sync + // primitives to the CV definition! + int fail = 0; + struct usbi_cond_perthread *pos; + + if (!cond) + return EINVAL; + list_for_each_entry(pos, &cond->waiters, list, struct usbi_cond_perthread) { + if (!SetEvent(pos->event)) + fail = 1; + } + // The wait function will remove its respective item from the list. + return fail ? EINVAL : 0; +} + +__inline static int usbi_cond_intwait(usbi_cond_t *cond, + usbi_mutex_t *mutex, DWORD timeout_ms) +{ + struct usbi_cond_perthread *pos; + int r, found = 0; + DWORD r2, tid = GetCurrentThreadId(); + + if (!cond || !mutex) + return EINVAL; + list_for_each_entry(pos, &cond->not_waiting, list, struct usbi_cond_perthread) { + if(tid == pos->tid) { + found = 1; + break; + } + } + + if (!found) { + pos = calloc(1, sizeof(struct usbi_cond_perthread)); + if (!pos) + return ENOMEM; // This errno is not POSIX-allowed. + pos->tid = tid; + pos->event = CreateEvent(NULL, FALSE, FALSE, NULL); // auto-reset. + if (!pos->event) { + free(pos); + return ENOMEM; + } + list_add(&pos->list, &cond->not_waiting); + } + + list_del(&pos->list); // remove from not_waiting list. + list_add(&pos->list, &cond->waiters); + + r = usbi_mutex_unlock(mutex); + if (r) + return r; + + r2 = WaitForSingleObject(pos->event, timeout_ms); + r = usbi_mutex_lock(mutex); + if (r) + return r; + + list_del(&pos->list); + list_add(&pos->list, &cond->not_waiting); + + if (r2 == WAIT_OBJECT_0) + return 0; + else if (r2 == WAIT_TIMEOUT) + return ETIMEDOUT; + else + return EINVAL; +} +// N.B.: usbi_cond_*wait() can also return ENOMEM, even though pthread_cond_*wait cannot! +int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex) +{ + return usbi_cond_intwait(cond, mutex, INFINITE); +} + +int usbi_cond_timedwait(usbi_cond_t *cond, + usbi_mutex_t *mutex, const struct timeval *tv) +{ + DWORD millis; + + millis = (DWORD)(tv->tv_sec * 1000) + (tv->tv_usec / 1000); + /* round up to next millisecond */ + if (tv->tv_usec % 1000) + millis++; + return usbi_cond_intwait(cond, mutex, millis); +} + +int usbi_tls_key_create(usbi_tls_key_t *key) +{ + if (!key) + return EINVAL; + *key = TlsAlloc(); + if (*key == TLS_OUT_OF_INDEXES) + return ENOMEM; + else + return 0; +} + +void *usbi_tls_key_get(usbi_tls_key_t key) +{ + return TlsGetValue(key); +} + +int usbi_tls_key_set(usbi_tls_key_t key, void *value) +{ + if (TlsSetValue(key, value)) + return 0; + else + return EINVAL; +} + +int usbi_tls_key_delete(usbi_tls_key_t key) +{ + if (TlsFree(key)) + return 0; + else + return EINVAL; +} + +int usbi_get_tid(void) +{ + return (int)GetCurrentThreadId(); +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_windows.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_windows.h new file mode 100644 index 000000000..e97ee7875 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/threads_windows.h @@ -0,0 +1,76 @@ +/* + * libusb synchronization on Microsoft Windows + * + * Copyright © 2010 Michael Plante + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LIBUSB_THREADS_WINDOWS_H +#define LIBUSB_THREADS_WINDOWS_H + +#define usbi_mutex_static_t volatile LONG +#define USBI_MUTEX_INITIALIZER 0 + +#define usbi_mutex_t HANDLE + +typedef struct usbi_cond { + // Every time a thread touches the CV, it winds up in one of these lists. + // It stays there until the CV is destroyed, even if the thread terminates. + struct list_head waiters; + struct list_head not_waiting; +} usbi_cond_t; + +// We *were* getting timespec from pthread.h: +#if (!defined(HAVE_STRUCT_TIMESPEC) && !defined(_TIMESPEC_DEFINED)) +#define HAVE_STRUCT_TIMESPEC 1 +#define _TIMESPEC_DEFINED 1 +struct timespec { + long tv_sec; + long tv_nsec; +}; +#endif /* HAVE_STRUCT_TIMESPEC | _TIMESPEC_DEFINED */ + +// We *were* getting ETIMEDOUT from pthread.h: +#ifndef ETIMEDOUT +# define ETIMEDOUT 10060 /* This is the value in winsock.h. */ +#endif + +#define usbi_tls_key_t DWORD + +int usbi_mutex_static_lock(usbi_mutex_static_t *mutex); +int usbi_mutex_static_unlock(usbi_mutex_static_t *mutex); + +int usbi_mutex_init(usbi_mutex_t *mutex); +int usbi_mutex_lock(usbi_mutex_t *mutex); +int usbi_mutex_unlock(usbi_mutex_t *mutex); +int usbi_mutex_trylock(usbi_mutex_t *mutex); +int usbi_mutex_destroy(usbi_mutex_t *mutex); + +int usbi_cond_init(usbi_cond_t *cond); +int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex); +int usbi_cond_timedwait(usbi_cond_t *cond, + usbi_mutex_t *mutex, const struct timeval *tv); +int usbi_cond_broadcast(usbi_cond_t *cond); +int usbi_cond_destroy(usbi_cond_t *cond); + +int usbi_tls_key_create(usbi_tls_key_t *key); +void *usbi_tls_key_get(usbi_tls_key_t key); +int usbi_tls_key_set(usbi_tls_key_t key, void *value); +int usbi_tls_key_delete(usbi_tls_key_t key); + +int usbi_get_tid(void); + +#endif /* LIBUSB_THREADS_WINDOWS_H */ diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/wince_usb.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/wince_usb.c new file mode 100644 index 000000000..0d466b8c9 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/wince_usb.c @@ -0,0 +1,899 @@ +/* + * Windows CE backend for libusb 1.0 + * Copyright © 2011-2013 RealVNC Ltd. + * Large portions taken from Windows backend, which is + * Copyright © 2009-2010 Pete Batard + * With contributions from Michael Plante, Orin Eman et al. + * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer + * Major code testing contribution by Xiaofan Chen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include + +#include "libusbi.h" +#include "wince_usb.h" + +// Global variables +int windows_version = WINDOWS_CE; +static uint64_t hires_frequency, hires_ticks_to_ps; +static HANDLE driver_handle = INVALID_HANDLE_VALUE; +static int concurrent_usage = -1; + +/* + * Converts a windows error to human readable string + * uses retval as errorcode, or, if 0, use GetLastError() + */ +#if defined(ENABLE_LOGGING) +static const char *windows_error_str(DWORD error_code) +{ + static TCHAR wErr_string[ERR_BUFFER_SIZE]; + static char err_string[ERR_BUFFER_SIZE]; + + DWORD size; + int len; + + if (error_code == 0) + error_code = GetLastError(); + + len = sprintf(err_string, "[%u] ", (unsigned int)error_code); + + size = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, + NULL, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + wErr_string, ERR_BUFFER_SIZE, NULL); + if (size == 0) { + DWORD format_error = GetLastError(); + if (format_error) + snprintf(err_string, ERR_BUFFER_SIZE, + "Windows error code %u (FormatMessage error code %u)", + (unsigned int)error_code, (unsigned int)format_error); + else + snprintf(err_string, ERR_BUFFER_SIZE, "Unknown error code %u", (unsigned int)error_code); + } else { + // Remove CR/LF terminators, if present + size_t pos = size - 2; + if (wErr_string[pos] == 0x0D) + wErr_string[pos] = 0; + + if (!WideCharToMultiByte(CP_ACP, 0, wErr_string, -1, &err_string[len], ERR_BUFFER_SIZE - len, NULL, NULL)) + strcpy(err_string, "Unable to convert error string"); + } + + return err_string; +} +#endif + +static struct wince_device_priv *_device_priv(struct libusb_device *dev) +{ + return (struct wince_device_priv *)dev->os_priv; +} + +// ceusbkwrapper to libusb error code mapping +static int translate_driver_error(DWORD error) +{ + switch (error) { + case ERROR_INVALID_PARAMETER: + return LIBUSB_ERROR_INVALID_PARAM; + case ERROR_CALL_NOT_IMPLEMENTED: + case ERROR_NOT_SUPPORTED: + return LIBUSB_ERROR_NOT_SUPPORTED; + case ERROR_NOT_ENOUGH_MEMORY: + return LIBUSB_ERROR_NO_MEM; + case ERROR_INVALID_HANDLE: + return LIBUSB_ERROR_NO_DEVICE; + case ERROR_BUSY: + return LIBUSB_ERROR_BUSY; + + // Error codes that are either unexpected, or have + // no suitable LIBUSB_ERROR equivalent. + case ERROR_CANCELLED: + case ERROR_INTERNAL_ERROR: + default: + return LIBUSB_ERROR_OTHER; + } +} + +static int init_dllimports(void) +{ + DLL_GET_HANDLE(ceusbkwrapper); + DLL_LOAD_FUNC(ceusbkwrapper, UkwOpenDriver, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwGetDeviceList, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwReleaseDeviceList, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwGetDeviceAddress, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwGetDeviceDescriptor, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwGetConfigDescriptor, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwCloseDriver, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwCancelTransfer, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwIssueControlTransfer, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwClaimInterface, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwReleaseInterface, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwSetInterfaceAlternateSetting, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwClearHaltHost, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwClearHaltDevice, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwGetConfig, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwSetConfig, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwResetDevice, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwKernelDriverActive, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwAttachKernelDriver, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwDetachKernelDriver, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwIssueBulkTransfer, TRUE); + DLL_LOAD_FUNC(ceusbkwrapper, UkwIsPipeHalted, TRUE); + + return LIBUSB_SUCCESS; +} + +static void exit_dllimports(void) +{ + DLL_FREE_HANDLE(ceusbkwrapper); +} + +static int init_device( + struct libusb_device *dev, UKW_DEVICE drv_dev, + unsigned char bus_addr, unsigned char dev_addr) +{ + struct wince_device_priv *priv = _device_priv(dev); + int r = LIBUSB_SUCCESS; + + dev->bus_number = bus_addr; + dev->device_address = dev_addr; + priv->dev = drv_dev; + + if (!UkwGetDeviceDescriptor(priv->dev, &(priv->desc))) + r = translate_driver_error(GetLastError()); + + return r; +} + +// Internal API functions +static int wince_init(struct libusb_context *ctx) +{ + int r = LIBUSB_ERROR_OTHER; + HANDLE semaphore; + LARGE_INTEGER li_frequency; + TCHAR sem_name[11 + 8 + 1]; // strlen("libusb_init") + (32-bit hex PID) + '\0' + + _stprintf(sem_name, _T("libusb_init%08X"), (unsigned int)(GetCurrentProcessId() & 0xFFFFFFFF)); + semaphore = CreateSemaphore(NULL, 1, 1, sem_name); + if (semaphore == NULL) { + usbi_err(ctx, "could not create semaphore: %s", windows_error_str(0)); + return LIBUSB_ERROR_NO_MEM; + } + + // A successful wait brings our semaphore count to 0 (unsignaled) + // => any concurent wait stalls until the semaphore's release + if (WaitForSingleObject(semaphore, INFINITE) != WAIT_OBJECT_0) { + usbi_err(ctx, "failure to access semaphore: %s", windows_error_str(0)); + CloseHandle(semaphore); + return LIBUSB_ERROR_NO_MEM; + } + + // NB: concurrent usage supposes that init calls are equally balanced with + // exit calls. If init is called more than exit, we will not exit properly + if ( ++concurrent_usage == 0 ) { // First init? + // Initialize pollable file descriptors + init_polling(); + + // Load DLL imports + if (init_dllimports() != LIBUSB_SUCCESS) { + usbi_err(ctx, "could not resolve DLL functions"); + r = LIBUSB_ERROR_NOT_SUPPORTED; + goto init_exit; + } + + // try to open a handle to the driver + driver_handle = UkwOpenDriver(); + if (driver_handle == INVALID_HANDLE_VALUE) { + usbi_err(ctx, "could not connect to driver"); + r = LIBUSB_ERROR_NOT_SUPPORTED; + goto init_exit; + } + + // find out if we have access to a monotonic (hires) timer + if (QueryPerformanceFrequency(&li_frequency)) { + hires_frequency = li_frequency.QuadPart; + // The hires frequency can go as high as 4 GHz, so we'll use a conversion + // to picoseconds to compute the tv_nsecs part in clock_gettime + hires_ticks_to_ps = UINT64_C(1000000000000) / hires_frequency; + usbi_dbg("hires timer available (Frequency: %"PRIu64" Hz)", hires_frequency); + } else { + usbi_dbg("no hires timer available on this platform"); + hires_frequency = 0; + hires_ticks_to_ps = UINT64_C(0); + } + } + // At this stage, either we went through full init successfully, or didn't need to + r = LIBUSB_SUCCESS; + +init_exit: // Holds semaphore here. + if (!concurrent_usage && r != LIBUSB_SUCCESS) { // First init failed? + exit_dllimports(); + exit_polling(); + + if (driver_handle != INVALID_HANDLE_VALUE) { + UkwCloseDriver(driver_handle); + driver_handle = INVALID_HANDLE_VALUE; + } + } + + if (r != LIBUSB_SUCCESS) + --concurrent_usage; // Not expected to call libusb_exit if we failed. + + ReleaseSemaphore(semaphore, 1, NULL); // increase count back to 1 + CloseHandle(semaphore); + return r; +} + +static void wince_exit(void) +{ + HANDLE semaphore; + TCHAR sem_name[11 + 8 + 1]; // strlen("libusb_init") + (32-bit hex PID) + '\0' + + _stprintf(sem_name, _T("libusb_init%08X"), (unsigned int)(GetCurrentProcessId() & 0xFFFFFFFF)); + semaphore = CreateSemaphore(NULL, 1, 1, sem_name); + if (semaphore == NULL) + return; + + // A successful wait brings our semaphore count to 0 (unsignaled) + // => any concurent wait stalls until the semaphore release + if (WaitForSingleObject(semaphore, INFINITE) != WAIT_OBJECT_0) { + CloseHandle(semaphore); + return; + } + + // Only works if exits and inits are balanced exactly + if (--concurrent_usage < 0) { // Last exit + exit_dllimports(); + exit_polling(); + + if (driver_handle != INVALID_HANDLE_VALUE) { + UkwCloseDriver(driver_handle); + driver_handle = INVALID_HANDLE_VALUE; + } + } + + ReleaseSemaphore(semaphore, 1, NULL); // increase count back to 1 + CloseHandle(semaphore); +} + +static int wince_get_device_list( + struct libusb_context *ctx, + struct discovered_devs **discdevs) +{ + UKW_DEVICE devices[MAX_DEVICE_COUNT]; + struct discovered_devs *new_devices = *discdevs; + DWORD count = 0, i; + struct libusb_device *dev = NULL; + unsigned char bus_addr, dev_addr; + unsigned long session_id; + BOOL success; + DWORD release_list_offset = 0; + int r = LIBUSB_SUCCESS; + + success = UkwGetDeviceList(driver_handle, devices, MAX_DEVICE_COUNT, &count); + if (!success) { + int libusbErr = translate_driver_error(GetLastError()); + usbi_err(ctx, "could not get devices: %s", windows_error_str(0)); + return libusbErr; + } + + for (i = 0; i < count; ++i) { + release_list_offset = i; + success = UkwGetDeviceAddress(devices[i], &bus_addr, &dev_addr, &session_id); + if (!success) { + r = translate_driver_error(GetLastError()); + usbi_err(ctx, "could not get device address for %u: %s", (unsigned int)i, windows_error_str(0)); + goto err_out; + } + + dev = usbi_get_device_by_session_id(ctx, session_id); + if (dev) { + usbi_dbg("using existing device for %u/%u (session %lu)", + bus_addr, dev_addr, session_id); + // Release just this element in the device list (as we already hold a + // reference to it). + UkwReleaseDeviceList(driver_handle, &devices[i], 1); + release_list_offset++; + } else { + usbi_dbg("allocating new device for %u/%u (session %lu)", + bus_addr, dev_addr, session_id); + dev = usbi_alloc_device(ctx, session_id); + if (!dev) { + r = LIBUSB_ERROR_NO_MEM; + goto err_out; + } + + r = init_device(dev, devices[i], bus_addr, dev_addr); + if (r < 0) + goto err_out; + + r = usbi_sanitize_device(dev); + if (r < 0) + goto err_out; + } + + new_devices = discovered_devs_append(new_devices, dev); + if (!discdevs) { + r = LIBUSB_ERROR_NO_MEM; + goto err_out; + } + + libusb_unref_device(dev); + } + + *discdevs = new_devices; + return r; +err_out: + *discdevs = new_devices; + libusb_unref_device(dev); + // Release the remainder of the unprocessed device list. + // The devices added to new_devices already will still be passed up to libusb, + // which can dispose of them at its leisure. + UkwReleaseDeviceList(driver_handle, &devices[release_list_offset], count - release_list_offset); + return r; +} + +static int wince_open(struct libusb_device_handle *handle) +{ + // Nothing to do to open devices as a handle to it has + // been retrieved by wince_get_device_list + return LIBUSB_SUCCESS; +} + +static void wince_close(struct libusb_device_handle *handle) +{ + // Nothing to do as wince_open does nothing. +} + +static int wince_get_device_descriptor( + struct libusb_device *device, + unsigned char *buffer, int *host_endian) +{ + struct wince_device_priv *priv = _device_priv(device); + + *host_endian = 1; + memcpy(buffer, &priv->desc, DEVICE_DESC_LENGTH); + return LIBUSB_SUCCESS; +} + +static int wince_get_active_config_descriptor( + struct libusb_device *device, + unsigned char *buffer, size_t len, int *host_endian) +{ + struct wince_device_priv *priv = _device_priv(device); + DWORD actualSize = len; + + *host_endian = 0; + if (!UkwGetConfigDescriptor(priv->dev, UKW_ACTIVE_CONFIGURATION, buffer, len, &actualSize)) + return translate_driver_error(GetLastError()); + + return actualSize; +} + +static int wince_get_config_descriptor( + struct libusb_device *device, + uint8_t config_index, + unsigned char *buffer, size_t len, int *host_endian) +{ + struct wince_device_priv *priv = _device_priv(device); + DWORD actualSize = len; + + *host_endian = 0; + if (!UkwGetConfigDescriptor(priv->dev, config_index, buffer, len, &actualSize)) + return translate_driver_error(GetLastError()); + + return actualSize; +} + +static int wince_get_configuration( + struct libusb_device_handle *handle, + int *config) +{ + struct wince_device_priv *priv = _device_priv(handle->dev); + UCHAR cv = 0; + + if (!UkwGetConfig(priv->dev, &cv)) + return translate_driver_error(GetLastError()); + + (*config) = cv; + return LIBUSB_SUCCESS; +} + +static int wince_set_configuration( + struct libusb_device_handle *handle, + int config) +{ + struct wince_device_priv *priv = _device_priv(handle->dev); + // Setting configuration 0 places the device in Address state. + // This should correspond to the "unconfigured state" required by + // libusb when the specified configuration is -1. + UCHAR cv = (config < 0) ? 0 : config; + if (!UkwSetConfig(priv->dev, cv)) + return translate_driver_error(GetLastError()); + + return LIBUSB_SUCCESS; +} + +static int wince_claim_interface( + struct libusb_device_handle *handle, + int interface_number) +{ + struct wince_device_priv *priv = _device_priv(handle->dev); + + if (!UkwClaimInterface(priv->dev, interface_number)) + return translate_driver_error(GetLastError()); + + return LIBUSB_SUCCESS; +} + +static int wince_release_interface( + struct libusb_device_handle *handle, + int interface_number) +{ + struct wince_device_priv *priv = _device_priv(handle->dev); + + if (!UkwSetInterfaceAlternateSetting(priv->dev, interface_number, 0)) + return translate_driver_error(GetLastError()); + + if (!UkwReleaseInterface(priv->dev, interface_number)) + return translate_driver_error(GetLastError()); + + return LIBUSB_SUCCESS; +} + +static int wince_set_interface_altsetting( + struct libusb_device_handle *handle, + int interface_number, int altsetting) +{ + struct wince_device_priv *priv = _device_priv(handle->dev); + + if (!UkwSetInterfaceAlternateSetting(priv->dev, interface_number, altsetting)) + return translate_driver_error(GetLastError()); + + return LIBUSB_SUCCESS; +} + +static int wince_clear_halt( + struct libusb_device_handle *handle, + unsigned char endpoint) +{ + struct wince_device_priv *priv = _device_priv(handle->dev); + + if (!UkwClearHaltHost(priv->dev, endpoint)) + return translate_driver_error(GetLastError()); + + if (!UkwClearHaltDevice(priv->dev, endpoint)) + return translate_driver_error(GetLastError()); + + return LIBUSB_SUCCESS; +} + +static int wince_reset_device( + struct libusb_device_handle *handle) +{ + struct wince_device_priv *priv = _device_priv(handle->dev); + + if (!UkwResetDevice(priv->dev)) + return translate_driver_error(GetLastError()); + + return LIBUSB_SUCCESS; +} + +static int wince_kernel_driver_active( + struct libusb_device_handle *handle, + int interface_number) +{ + struct wince_device_priv *priv = _device_priv(handle->dev); + BOOL result = FALSE; + + if (!UkwKernelDriverActive(priv->dev, interface_number, &result)) + return translate_driver_error(GetLastError()); + + return result ? 1 : 0; +} + +static int wince_detach_kernel_driver( + struct libusb_device_handle *handle, + int interface_number) +{ + struct wince_device_priv *priv = _device_priv(handle->dev); + + if (!UkwDetachKernelDriver(priv->dev, interface_number)) + return translate_driver_error(GetLastError()); + + return LIBUSB_SUCCESS; +} + +static int wince_attach_kernel_driver( + struct libusb_device_handle *handle, + int interface_number) +{ + struct wince_device_priv *priv = _device_priv(handle->dev); + + if (!UkwAttachKernelDriver(priv->dev, interface_number)) + return translate_driver_error(GetLastError()); + + return LIBUSB_SUCCESS; +} + +static void wince_destroy_device(struct libusb_device *dev) +{ + struct wince_device_priv *priv = _device_priv(dev); + + UkwReleaseDeviceList(driver_handle, &priv->dev, 1); +} + +static void wince_clear_transfer_priv(struct usbi_transfer *itransfer) +{ + struct wince_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct winfd wfd = fd_to_winfd(transfer_priv->pollable_fd.fd); + + // No need to cancel transfer as it is either complete or abandoned + wfd.itransfer = NULL; + CloseHandle(wfd.handle); + usbi_free_fd(&transfer_priv->pollable_fd); +} + +static int wince_cancel_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct wince_device_priv *priv = _device_priv(transfer->dev_handle->dev); + struct wince_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + + if (!UkwCancelTransfer(priv->dev, transfer_priv->pollable_fd.overlapped, UKW_TF_NO_WAIT)) + return translate_driver_error(GetLastError()); + + return LIBUSB_SUCCESS; +} + +static int wince_submit_control_or_bulk_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct wince_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct wince_device_priv *priv = _device_priv(transfer->dev_handle->dev); + BOOL direction_in, ret; + struct winfd wfd; + DWORD flags; + HANDLE eventHandle; + PUKW_CONTROL_HEADER setup = NULL; + const BOOL control_transfer = transfer->type == LIBUSB_TRANSFER_TYPE_CONTROL; + + transfer_priv->pollable_fd = INVALID_WINFD; + if (control_transfer) { + setup = (PUKW_CONTROL_HEADER) transfer->buffer; + direction_in = setup->bmRequestType & LIBUSB_ENDPOINT_IN; + } else { + direction_in = transfer->endpoint & LIBUSB_ENDPOINT_IN; + } + flags = direction_in ? UKW_TF_IN_TRANSFER : UKW_TF_OUT_TRANSFER; + flags |= UKW_TF_SHORT_TRANSFER_OK; + + eventHandle = CreateEvent(NULL, FALSE, FALSE, NULL); + if (eventHandle == NULL) { + usbi_err(ctx, "Failed to create event for async transfer"); + return LIBUSB_ERROR_NO_MEM; + } + + wfd = usbi_create_fd(eventHandle, direction_in ? RW_READ : RW_WRITE, itransfer, &wince_cancel_transfer); + if (wfd.fd < 0) { + CloseHandle(eventHandle); + return LIBUSB_ERROR_NO_MEM; + } + + transfer_priv->pollable_fd = wfd; + if (control_transfer) { + // Split out control setup header and data buffer + DWORD bufLen = transfer->length - sizeof(UKW_CONTROL_HEADER); + PVOID buf = (PVOID) &transfer->buffer[sizeof(UKW_CONTROL_HEADER)]; + + ret = UkwIssueControlTransfer(priv->dev, flags, setup, buf, bufLen, &transfer->actual_length, wfd.overlapped); + } else { + ret = UkwIssueBulkTransfer(priv->dev, flags, transfer->endpoint, transfer->buffer, + transfer->length, &transfer->actual_length, wfd.overlapped); + } + + if (!ret) { + int libusbErr = translate_driver_error(GetLastError()); + usbi_err(ctx, "UkwIssue%sTransfer failed: error %u", + control_transfer ? "Control" : "Bulk", (unsigned int)GetLastError()); + wince_clear_transfer_priv(itransfer); + return libusbErr; + } + usbi_add_pollfd(ctx, transfer_priv->pollable_fd.fd, direction_in ? POLLIN : POLLOUT); + + return LIBUSB_SUCCESS; +} + +static int wince_submit_iso_transfer(struct usbi_transfer *itransfer) +{ + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +static int wince_submit_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + return wince_submit_control_or_bulk_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + return wince_submit_iso_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + return LIBUSB_ERROR_NOT_SUPPORTED; + default: + usbi_err(TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type); + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +static void wince_transfer_callback( + struct usbi_transfer *itransfer, + uint32_t io_result, uint32_t io_size) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct wince_transfer_priv *transfer_priv = (struct wince_transfer_priv*)usbi_transfer_get_os_priv(itransfer); + struct wince_device_priv *priv = _device_priv(transfer->dev_handle->dev); + int status; + + usbi_dbg("handling I/O completion with errcode %u", io_result); + + if (io_result == ERROR_NOT_SUPPORTED && + transfer->type != LIBUSB_TRANSFER_TYPE_CONTROL) { + /* For functional stalls, the WinCE USB layer (and therefore the USB Kernel Wrapper + * Driver) will report USB_ERROR_STALL/ERROR_NOT_SUPPORTED in situations where the + * endpoint isn't actually stalled. + * + * One example of this is that some devices will occasionally fail to reply to an IN + * token. The WinCE USB layer carries on with the transaction until it is completed + * (or cancelled) but then completes it with USB_ERROR_STALL. + * + * This code therefore needs to confirm that there really is a stall error, by both + * checking the pipe status and requesting the endpoint status from the device. + */ + BOOL halted = FALSE; + usbi_dbg("checking I/O completion with errcode ERROR_NOT_SUPPORTED is really a stall"); + if (UkwIsPipeHalted(priv->dev, transfer->endpoint, &halted)) { + /* Pipe status retrieved, so now request endpoint status by sending a GET_STATUS + * control request to the device. This is done synchronously, which is a bit + * naughty, but this is a special corner case. + */ + WORD wStatus = 0; + DWORD written = 0; + UKW_CONTROL_HEADER ctrlHeader; + ctrlHeader.bmRequestType = LIBUSB_REQUEST_TYPE_STANDARD | + LIBUSB_ENDPOINT_IN | LIBUSB_RECIPIENT_ENDPOINT; + ctrlHeader.bRequest = LIBUSB_REQUEST_GET_STATUS; + ctrlHeader.wValue = 0; + ctrlHeader.wIndex = transfer->endpoint; + ctrlHeader.wLength = sizeof(wStatus); + if (UkwIssueControlTransfer(priv->dev, + UKW_TF_IN_TRANSFER | UKW_TF_SEND_TO_ENDPOINT, + &ctrlHeader, &wStatus, sizeof(wStatus), &written, NULL)) { + if (written == sizeof(wStatus) && + (wStatus & STATUS_HALT_FLAG) == 0) { + if (!halted || UkwClearHaltHost(priv->dev, transfer->endpoint)) { + usbi_dbg("Endpoint doesn't appear to be stalled, overriding error with success"); + io_result = ERROR_SUCCESS; + } else { + usbi_dbg("Endpoint doesn't appear to be stalled, but the host is halted, changing error"); + io_result = ERROR_IO_DEVICE; + } + } + } + } + } + + switch(io_result) { + case ERROR_SUCCESS: + itransfer->transferred += io_size; + status = LIBUSB_TRANSFER_COMPLETED; + break; + case ERROR_CANCELLED: + usbi_dbg("detected transfer cancel"); + status = LIBUSB_TRANSFER_CANCELLED; + break; + case ERROR_NOT_SUPPORTED: + case ERROR_GEN_FAILURE: + usbi_dbg("detected endpoint stall"); + status = LIBUSB_TRANSFER_STALL; + break; + case ERROR_SEM_TIMEOUT: + usbi_dbg("detected semaphore timeout"); + status = LIBUSB_TRANSFER_TIMED_OUT; + break; + case ERROR_OPERATION_ABORTED: + usbi_dbg("detected operation aborted"); + status = LIBUSB_TRANSFER_CANCELLED; + break; + default: + usbi_err(ITRANSFER_CTX(itransfer), "detected I/O error: %s", windows_error_str(io_result)); + status = LIBUSB_TRANSFER_ERROR; + break; + } + + wince_clear_transfer_priv(itransfer); + if (status == LIBUSB_TRANSFER_CANCELLED) + usbi_handle_transfer_cancellation(itransfer); + else + usbi_handle_transfer_completion(itransfer, (enum libusb_transfer_status)status); +} + +static void wince_handle_callback( + struct usbi_transfer *itransfer, + uint32_t io_result, uint32_t io_size) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + wince_transfer_callback (itransfer, io_result, io_size); + break; + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + break; + default: + usbi_err(ITRANSFER_CTX(itransfer), "unknown endpoint type %d", transfer->type); + } +} + +static int wince_handle_events( + struct libusb_context *ctx, + struct pollfd *fds, POLL_NFDS_TYPE nfds, int num_ready) +{ + struct wince_transfer_priv* transfer_priv = NULL; + POLL_NFDS_TYPE i = 0; + BOOL found = FALSE; + struct usbi_transfer *transfer; + DWORD io_size, io_result; + int r = LIBUSB_SUCCESS; + + usbi_mutex_lock(&ctx->open_devs_lock); + for (i = 0; i < nfds && num_ready > 0; i++) { + + usbi_dbg("checking fd %d with revents = %04x", fds[i].fd, fds[i].revents); + + if (!fds[i].revents) + continue; + + num_ready--; + + // Because a Windows OVERLAPPED is used for poll emulation, + // a pollable fd is created and stored with each transfer + usbi_mutex_lock(&ctx->flying_transfers_lock); + list_for_each_entry(transfer, &ctx->flying_transfers, list, struct usbi_transfer) { + transfer_priv = usbi_transfer_get_os_priv(transfer); + if (transfer_priv->pollable_fd.fd == fds[i].fd) { + found = TRUE; + break; + } + } + usbi_mutex_unlock(&ctx->flying_transfers_lock); + + if (found && HasOverlappedIoCompleted(transfer_priv->pollable_fd.overlapped)) { + io_result = (DWORD)transfer_priv->pollable_fd.overlapped->Internal; + io_size = (DWORD)transfer_priv->pollable_fd.overlapped->InternalHigh; + usbi_remove_pollfd(ctx, transfer_priv->pollable_fd.fd); + // let handle_callback free the event using the transfer wfd + // If you don't use the transfer wfd, you run a risk of trying to free a + // newly allocated wfd that took the place of the one from the transfer. + wince_handle_callback(transfer, io_result, io_size); + } else if (found) { + usbi_err(ctx, "matching transfer for fd %d has not completed", fds[i]); + r = LIBUSB_ERROR_OTHER; + break; + } else { + usbi_err(ctx, "could not find a matching transfer for fd %d", fds[i]); + r = LIBUSB_ERROR_NOT_FOUND; + break; + } + } + usbi_mutex_unlock(&ctx->open_devs_lock); + + return r; +} + +/* + * Monotonic and real time functions + */ +static int wince_clock_gettime(int clk_id, struct timespec *tp) +{ + LARGE_INTEGER hires_counter; + ULARGE_INTEGER rtime; + FILETIME filetime; + SYSTEMTIME st; + + switch(clk_id) { + case USBI_CLOCK_MONOTONIC: + if (hires_frequency != 0 && QueryPerformanceCounter(&hires_counter)) { + tp->tv_sec = (long)(hires_counter.QuadPart / hires_frequency); + tp->tv_nsec = (long)(((hires_counter.QuadPart % hires_frequency) / 1000) * hires_ticks_to_ps); + return LIBUSB_SUCCESS; + } + // Fall through and return real-time if monotonic read failed or was not detected @ init + case USBI_CLOCK_REALTIME: + // We follow http://msdn.microsoft.com/en-us/library/ms724928%28VS.85%29.aspx + // with a predef epoch time to have an epoch that starts at 1970.01.01 00:00 + // Note however that our resolution is bounded by the Windows system time + // functions and is at best of the order of 1 ms (or, usually, worse) + GetSystemTime(&st); + SystemTimeToFileTime(&st, &filetime); + rtime.LowPart = filetime.dwLowDateTime; + rtime.HighPart = filetime.dwHighDateTime; + rtime.QuadPart -= EPOCH_TIME; + tp->tv_sec = (long)(rtime.QuadPart / 10000000); + tp->tv_nsec = (long)((rtime.QuadPart % 10000000)*100); + return LIBUSB_SUCCESS; + default: + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +const struct usbi_os_backend wince_backend = { + "Windows CE", + 0, + wince_init, + wince_exit, + + wince_get_device_list, + NULL, /* hotplug_poll */ + wince_open, + wince_close, + + wince_get_device_descriptor, + wince_get_active_config_descriptor, + wince_get_config_descriptor, + NULL, /* get_config_descriptor_by_value() */ + + wince_get_configuration, + wince_set_configuration, + wince_claim_interface, + wince_release_interface, + + wince_set_interface_altsetting, + wince_clear_halt, + wince_reset_device, + + NULL, /* alloc_streams */ + NULL, /* free_streams */ + + NULL, /* dev_mem_alloc() */ + NULL, /* dev_mem_free() */ + + wince_kernel_driver_active, + wince_detach_kernel_driver, + wince_attach_kernel_driver, + + wince_destroy_device, + + wince_submit_transfer, + wince_cancel_transfer, + wince_clear_transfer_priv, + + wince_handle_events, + NULL, /* handle_transfer_completion() */ + + wince_clock_gettime, + sizeof(struct wince_device_priv), + 0, + sizeof(struct wince_transfer_priv), +}; diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/wince_usb.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/wince_usb.h new file mode 100644 index 000000000..edcb9fcc4 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/wince_usb.h @@ -0,0 +1,126 @@ +/* + * Windows CE backend for libusb 1.0 + * Copyright © 2011-2013 RealVNC Ltd. + * Portions taken from Windows backend, which is + * Copyright © 2009-2010 Pete Batard + * With contributions from Michael Plante, Orin Eman et al. + * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer + * Major code testing contribution by Xiaofan Chen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#pragma once + +#include "windows_common.h" + +#include +#include "poll_windows.h" + +#define MAX_DEVICE_COUNT 256 + +// This is a modified dump of the types in the ceusbkwrapper.h library header +// with functions transformed into extern pointers. +// +// This backend dynamically loads ceusbkwrapper.dll and doesn't include +// ceusbkwrapper.h directly to simplify the build process. The kernel +// side wrapper driver is built using the platform image build tools, +// which makes it difficult to reference directly from the libusb build +// system. +struct UKW_DEVICE_PRIV; +typedef struct UKW_DEVICE_PRIV *UKW_DEVICE; +typedef UKW_DEVICE *PUKW_DEVICE, *LPUKW_DEVICE; + +typedef struct { + UINT8 bLength; + UINT8 bDescriptorType; + UINT16 bcdUSB; + UINT8 bDeviceClass; + UINT8 bDeviceSubClass; + UINT8 bDeviceProtocol; + UINT8 bMaxPacketSize0; + UINT16 idVendor; + UINT16 idProduct; + UINT16 bcdDevice; + UINT8 iManufacturer; + UINT8 iProduct; + UINT8 iSerialNumber; + UINT8 bNumConfigurations; +} UKW_DEVICE_DESCRIPTOR, *PUKW_DEVICE_DESCRIPTOR, *LPUKW_DEVICE_DESCRIPTOR; + +typedef struct { + UINT8 bmRequestType; + UINT8 bRequest; + UINT16 wValue; + UINT16 wIndex; + UINT16 wLength; +} UKW_CONTROL_HEADER, *PUKW_CONTROL_HEADER, *LPUKW_CONTROL_HEADER; + +// Collection of flags which can be used when issuing transfer requests +/* Indicates that the transfer direction is 'in' */ +#define UKW_TF_IN_TRANSFER 0x00000001 +/* Indicates that the transfer direction is 'out' */ +#define UKW_TF_OUT_TRANSFER 0x00000000 +/* Specifies that the transfer should complete as soon as possible, + * even if no OVERLAPPED structure has been provided. */ +#define UKW_TF_NO_WAIT 0x00000100 +/* Indicates that transfers shorter than the buffer are ok */ +#define UKW_TF_SHORT_TRANSFER_OK 0x00000200 +#define UKW_TF_SEND_TO_DEVICE 0x00010000 +#define UKW_TF_SEND_TO_INTERFACE 0x00020000 +#define UKW_TF_SEND_TO_ENDPOINT 0x00040000 +/* Don't block when waiting for memory allocations */ +#define UKW_TF_DONT_BLOCK_FOR_MEM 0x00080000 + +/* Value to use when dealing with configuration values, such as UkwGetConfigDescriptor, + * to specify the currently active configuration for the device. */ +#define UKW_ACTIVE_CONFIGURATION -1 + +DLL_DECLARE_HANDLE(ceusbkwrapper); +DLL_DECLARE_FUNC(WINAPI, HANDLE, UkwOpenDriver, ()); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwGetDeviceList, (HANDLE, LPUKW_DEVICE, DWORD, LPDWORD)); +DLL_DECLARE_FUNC(WINAPI, void, UkwReleaseDeviceList, (HANDLE, LPUKW_DEVICE, DWORD)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwGetDeviceAddress, (UKW_DEVICE, unsigned char*, unsigned char*, unsigned long*)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwGetDeviceDescriptor, (UKW_DEVICE, LPUKW_DEVICE_DESCRIPTOR)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwGetConfigDescriptor, (UKW_DEVICE, DWORD, LPVOID, DWORD, LPDWORD)); +DLL_DECLARE_FUNC(WINAPI, void, UkwCloseDriver, (HANDLE)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwCancelTransfer, (UKW_DEVICE, LPOVERLAPPED, DWORD)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwIssueControlTransfer, (UKW_DEVICE, DWORD, LPUKW_CONTROL_HEADER, LPVOID, DWORD, LPDWORD, LPOVERLAPPED)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwClaimInterface, (UKW_DEVICE, DWORD)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwReleaseInterface, (UKW_DEVICE, DWORD)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwSetInterfaceAlternateSetting, (UKW_DEVICE, DWORD, DWORD)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwClearHaltHost, (UKW_DEVICE, UCHAR)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwClearHaltDevice, (UKW_DEVICE, UCHAR)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwGetConfig, (UKW_DEVICE, PUCHAR)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwSetConfig, (UKW_DEVICE, UCHAR)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwResetDevice, (UKW_DEVICE)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwKernelDriverActive, (UKW_DEVICE, DWORD, PBOOL)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwAttachKernelDriver, (UKW_DEVICE, DWORD)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwDetachKernelDriver, (UKW_DEVICE, DWORD)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwIssueBulkTransfer, (UKW_DEVICE, DWORD, UCHAR, LPVOID, DWORD, LPDWORD, LPOVERLAPPED)); +DLL_DECLARE_FUNC(WINAPI, BOOL, UkwIsPipeHalted, (UKW_DEVICE, UCHAR, LPBOOL)); + +// Used to determine if an endpoint status really is halted on a failed transfer. +#define STATUS_HALT_FLAG 0x1 + +struct wince_device_priv { + UKW_DEVICE dev; + UKW_DEVICE_DESCRIPTOR desc; +}; + +struct wince_transfer_priv { + struct winfd pollable_fd; + uint8_t interface_number; +}; + diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_common.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_common.h new file mode 100644 index 000000000..55344ca26 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_common.h @@ -0,0 +1,124 @@ +/* + * Windows backend common header for libusb 1.0 + * + * This file brings together header code common between + * the desktop Windows and Windows CE backends. + * Copyright © 2012-2013 RealVNC Ltd. + * Copyright © 2009-2012 Pete Batard + * With contributions from Michael Plante, Orin Eman et al. + * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer + * Major code testing contribution by Xiaofan Chen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#pragma once + +// Windows API default is uppercase - ugh! +#if !defined(bool) +#define bool BOOL +#endif +#if !defined(true) +#define true TRUE +#endif +#if !defined(false) +#define false FALSE +#endif + +#define EPOCH_TIME UINT64_C(116444736000000000) // 1970.01.01 00:00:000 in MS Filetime + +#if defined(__CYGWIN__ ) +#define _stricmp strcasecmp +#define _strdup strdup +// _beginthreadex is MSVCRT => unavailable for cygwin. Fallback to using CreateThread +#define _beginthreadex(a, b, c, d, e, f) CreateThread(a, b, (LPTHREAD_START_ROUTINE)c, d, e, (LPDWORD)f) +#endif + +#define safe_free(p) do {if (p != NULL) {free((void *)p); p = NULL;}} while (0) + +#ifndef ARRAYSIZE +#define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0])) +#endif + +#define ERR_BUFFER_SIZE 256 + +/* + * API macros - leveraged from libusb-win32 1.x + */ +#ifndef _WIN32_WCE +#define DLL_STRINGIFY(s) #s +#define DLL_LOAD_LIBRARY(name) LoadLibraryA(DLL_STRINGIFY(name)) +#else +#define DLL_STRINGIFY(s) L#s +#define DLL_LOAD_LIBRARY(name) LoadLibrary(DLL_STRINGIFY(name)) +#endif + +/* + * Macros for handling DLL themselves + */ +#define DLL_DECLARE_HANDLE(name) \ + static HMODULE __dll_##name##_handle = NULL + +#define DLL_GET_HANDLE(name) \ + do { \ + __dll_##name##_handle = DLL_LOAD_LIBRARY(name); \ + if (!__dll_##name##_handle) \ + return LIBUSB_ERROR_OTHER; \ + } while (0) + +#define DLL_FREE_HANDLE(name) \ + do { \ + if (__dll_##name##_handle) { \ + FreeLibrary(__dll_##name##_handle); \ + __dll_##name##_handle = NULL; \ + } \ + } while(0) + + +/* + * Macros for handling functions within a DLL + */ +#define DLL_DECLARE_FUNC_PREFIXNAME(api, ret, prefixname, name, args) \ + typedef ret (api * __dll_##name##_func_t)args; \ + static __dll_##name##_func_t prefixname = NULL + +#define DLL_DECLARE_FUNC(api, ret, name, args) \ + DLL_DECLARE_FUNC_PREFIXNAME(api, ret, name, name, args) +#define DLL_DECLARE_FUNC_PREFIXED(api, ret, prefix, name, args) \ + DLL_DECLARE_FUNC_PREFIXNAME(api, ret, prefix##name, name, args) + +#define DLL_LOAD_FUNC_PREFIXNAME(dll, prefixname, name, ret_on_failure) \ + do { \ + HMODULE h = __dll_##dll##_handle; \ + prefixname = (__dll_##name##_func_t)GetProcAddress(h, \ + DLL_STRINGIFY(name)); \ + if (prefixname) \ + break; \ + prefixname = (__dll_##name##_func_t)GetProcAddress(h, \ + DLL_STRINGIFY(name) DLL_STRINGIFY(A)); \ + if (prefixname) \ + break; \ + prefixname = (__dll_##name##_func_t)GetProcAddress(h, \ + DLL_STRINGIFY(name) DLL_STRINGIFY(W)); \ + if (prefixname) \ + break; \ + if (ret_on_failure) \ + return LIBUSB_ERROR_NOT_FOUND; \ + } while(0) + +#define DLL_LOAD_FUNC(dll, name, ret_on_failure) \ + DLL_LOAD_FUNC_PREFIXNAME(dll, name, name, ret_on_failure) +#define DLL_LOAD_FUNC_PREFIXED(dll, prefix, name, ret_on_failure) \ + DLL_LOAD_FUNC_PREFIXNAME(dll, prefix##name, name, ret_on_failure) diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_nt_common.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_nt_common.c new file mode 100644 index 000000000..d935394a6 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_nt_common.c @@ -0,0 +1,591 @@ +/* + * windows backend for libusb 1.0 + * Copyright © 2009-2012 Pete Batard + * With contributions from Michael Plante, Orin Eman et al. + * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer + * HID Reports IOCTLs inspired from HIDAPI by Alan Ott, Signal 11 Software + * Hash table functions adapted from glibc, by Ulrich Drepper et al. + * Major code testing contribution by Xiaofan Chen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include + +#include "libusbi.h" +#include "windows_common.h" +#include "windows_nt_common.h" + +// Global variables for clock_gettime mechanism +static uint64_t hires_ticks_to_ps; +static uint64_t hires_frequency; + +#define TIMER_REQUEST_RETRY_MS 100 +#define WM_TIMER_REQUEST (WM_USER + 1) +#define WM_TIMER_EXIT (WM_USER + 2) + +// used for monotonic clock_gettime() +struct timer_request { + struct timespec *tp; + HANDLE event; +}; + +// Timer thread +static HANDLE timer_thread = NULL; +static DWORD timer_thread_id = 0; + +/* User32 dependencies */ +DLL_DECLARE_HANDLE(User32); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, GetMessageA, (LPMSG, HWND, UINT, UINT)); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, PeekMessageA, (LPMSG, HWND, UINT, UINT, UINT)); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, PostThreadMessageA, (DWORD, UINT, WPARAM, LPARAM)); + +static unsigned __stdcall windows_clock_gettime_threaded(void *param); + +/* +* Converts a windows error to human readable string +* uses retval as errorcode, or, if 0, use GetLastError() +*/ +#if defined(ENABLE_LOGGING) +const char *windows_error_str(DWORD error_code) +{ + static char err_string[ERR_BUFFER_SIZE]; + + DWORD size; + int len; + + if (error_code == 0) + error_code = GetLastError(); + + len = sprintf(err_string, "[%u] ", (unsigned int)error_code); + + // Translate codes returned by SetupAPI. The ones we are dealing with are either + // in 0x0000xxxx or 0xE000xxxx and can be distinguished from standard error codes. + // See http://msdn.microsoft.com/en-us/library/windows/hardware/ff545011.aspx + switch (error_code & 0xE0000000) { + case 0: + error_code = HRESULT_FROM_WIN32(error_code); // Still leaves ERROR_SUCCESS unmodified + break; + case 0xE0000000: + error_code = 0x80000000 | (FACILITY_SETUPAPI << 16) | (error_code & 0x0000FFFF); + break; + default: + break; + } + + size = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, + NULL, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + &err_string[len], ERR_BUFFER_SIZE - len, NULL); + if (size == 0) { + DWORD format_error = GetLastError(); + if (format_error) + snprintf(err_string, ERR_BUFFER_SIZE, + "Windows error code %u (FormatMessage error code %u)", + (unsigned int)error_code, (unsigned int)format_error); + else + snprintf(err_string, ERR_BUFFER_SIZE, "Unknown error code %u", (unsigned int)error_code); + } else { + // Remove CRLF from end of message, if present + size_t pos = len + size - 2; + if (err_string[pos] == '\r') + err_string[pos] = '\0'; + } + + return err_string; +} +#endif + +/* Hash table functions - modified From glibc 2.3.2: + [Aho,Sethi,Ullman] Compilers: Principles, Techniques and Tools, 1986 + [Knuth] The Art of Computer Programming, part 3 (6.4) */ + +#define HTAB_SIZE 1021UL // *MUST* be a prime number!! + +typedef struct htab_entry { + unsigned long used; + char *str; +} htab_entry; + +static htab_entry *htab_table = NULL; +static usbi_mutex_t htab_mutex = NULL; +static unsigned long htab_filled; + +/* Before using the hash table we must allocate memory for it. + We allocate one element more as the found prime number says. + This is done for more effective indexing as explained in the + comment for the hash function. */ +static bool htab_create(struct libusb_context *ctx) +{ + if (htab_table != NULL) { + usbi_err(ctx, "hash table already allocated"); + return true; + } + + // Create a mutex + usbi_mutex_init(&htab_mutex); + + usbi_dbg("using %lu entries hash table", HTAB_SIZE); + htab_filled = 0; + + // allocate memory and zero out. + htab_table = calloc(HTAB_SIZE + 1, sizeof(htab_entry)); + if (htab_table == NULL) { + usbi_err(ctx, "could not allocate space for hash table"); + return false; + } + + return true; +} + +/* After using the hash table it has to be destroyed. */ +static void htab_destroy(void) +{ + unsigned long i; + + if (htab_table == NULL) + return; + + for (i = 0; i < HTAB_SIZE; i++) + free(htab_table[i].str); + + safe_free(htab_table); + + usbi_mutex_destroy(&htab_mutex); +} + +/* This is the search function. It uses double hashing with open addressing. + We use a trick to speed up the lookup. The table is created with one + more element available. This enables us to use the index zero special. + This index will never be used because we store the first hash index in + the field used where zero means not used. Every other value means used. + The used field can be used as a first fast comparison for equality of + the stored and the parameter value. This helps to prevent unnecessary + expensive calls of strcmp. */ +unsigned long htab_hash(const char *str) +{ + unsigned long hval, hval2; + unsigned long idx; + unsigned long r = 5381; + int c; + const char *sz = str; + + if (str == NULL) + return 0; + + // Compute main hash value (algorithm suggested by Nokia) + while ((c = *sz++) != 0) + r = ((r << 5) + r) + c; + if (r == 0) + ++r; + + // compute table hash: simply take the modulus + hval = r % HTAB_SIZE; + if (hval == 0) + ++hval; + + // Try the first index + idx = hval; + + // Mutually exclusive access (R/W lock would be better) + usbi_mutex_lock(&htab_mutex); + + if (htab_table[idx].used) { + if ((htab_table[idx].used == hval) && (strcmp(str, htab_table[idx].str) == 0)) + goto out_unlock; // existing hash + + usbi_dbg("hash collision ('%s' vs '%s')", str, htab_table[idx].str); + + // Second hash function, as suggested in [Knuth] + hval2 = 1 + hval % (HTAB_SIZE - 2); + + do { + // Because size is prime this guarantees to step through all available indexes + if (idx <= hval2) + idx = HTAB_SIZE + idx - hval2; + else + idx -= hval2; + + // If we visited all entries leave the loop unsuccessfully + if (idx == hval) + break; + + // If entry is found use it. + if ((htab_table[idx].used == hval) && (strcmp(str, htab_table[idx].str) == 0)) + goto out_unlock; + } while (htab_table[idx].used); + } + + // Not found => New entry + + // If the table is full return an error + if (htab_filled >= HTAB_SIZE) { + usbi_err(NULL, "hash table is full (%lu entries)", HTAB_SIZE); + idx = 0; + goto out_unlock; + } + + htab_table[idx].str = _strdup(str); + if (htab_table[idx].str == NULL) { + usbi_err(NULL, "could not duplicate string for hash table"); + idx = 0; + goto out_unlock; + } + + htab_table[idx].used = hval; + ++htab_filled; + +out_unlock: + usbi_mutex_unlock(&htab_mutex); + + return idx; +} + +static int windows_init_dlls(void) +{ + DLL_GET_HANDLE(User32); + DLL_LOAD_FUNC_PREFIXED(User32, p, GetMessageA, TRUE); + DLL_LOAD_FUNC_PREFIXED(User32, p, PeekMessageA, TRUE); + DLL_LOAD_FUNC_PREFIXED(User32, p, PostThreadMessageA, TRUE); + + return LIBUSB_SUCCESS; +} + +static void windows_exit_dlls(void) +{ + DLL_FREE_HANDLE(User32); +} + +static bool windows_init_clock(struct libusb_context *ctx) +{ + DWORD_PTR affinity, dummy; + HANDLE event = NULL; + LARGE_INTEGER li_frequency; + int i; + + if (QueryPerformanceFrequency(&li_frequency)) { + // Load DLL imports + if (windows_init_dlls() != LIBUSB_SUCCESS) { + usbi_err(ctx, "could not resolve DLL functions"); + return false; + } + + // The hires frequency can go as high as 4 GHz, so we'll use a conversion + // to picoseconds to compute the tv_nsecs part in clock_gettime + hires_frequency = li_frequency.QuadPart; + hires_ticks_to_ps = UINT64_C(1000000000000) / hires_frequency; + usbi_dbg("hires timer available (Frequency: %"PRIu64" Hz)", hires_frequency); + + // Because QueryPerformanceCounter might report different values when + // running on different cores, we create a separate thread for the timer + // calls, which we glue to the first available core always to prevent timing discrepancies. + if (!GetProcessAffinityMask(GetCurrentProcess(), &affinity, &dummy) || (affinity == 0)) { + usbi_err(ctx, "could not get process affinity: %s", windows_error_str(0)); + return false; + } + + // The process affinity mask is a bitmask where each set bit represents a core on + // which this process is allowed to run, so we find the first set bit + for (i = 0; !(affinity & (DWORD_PTR)(1 << i)); i++); + affinity = (DWORD_PTR)(1 << i); + + usbi_dbg("timer thread will run on core #%d", i); + + event = CreateEvent(NULL, FALSE, FALSE, NULL); + if (event == NULL) { + usbi_err(ctx, "could not create event: %s", windows_error_str(0)); + return false; + } + + timer_thread = (HANDLE)_beginthreadex(NULL, 0, windows_clock_gettime_threaded, (void *)event, + 0, (unsigned int *)&timer_thread_id); + if (timer_thread == NULL) { + usbi_err(ctx, "unable to create timer thread - aborting"); + CloseHandle(event); + return false; + } + + if (!SetThreadAffinityMask(timer_thread, affinity)) + usbi_warn(ctx, "unable to set timer thread affinity, timer discrepancies may arise"); + + // Wait for timer thread to init before continuing. + if (WaitForSingleObject(event, INFINITE) != WAIT_OBJECT_0) { + usbi_err(ctx, "failed to wait for timer thread to become ready - aborting"); + CloseHandle(event); + return false; + } + + CloseHandle(event); + } else { + usbi_dbg("no hires timer available on this platform"); + hires_frequency = 0; + hires_ticks_to_ps = UINT64_C(0); + } + + return true; +} + +void windows_destroy_clock(void) +{ + if (timer_thread) { + // actually the signal to quit the thread. + if (!pPostThreadMessageA(timer_thread_id, WM_TIMER_EXIT, 0, 0) + || (WaitForSingleObject(timer_thread, INFINITE) != WAIT_OBJECT_0)) { + usbi_dbg("could not wait for timer thread to quit"); + TerminateThread(timer_thread, 1); + // shouldn't happen, but we're destroying + // all objects it might have held anyway. + } + CloseHandle(timer_thread); + timer_thread = NULL; + timer_thread_id = 0; + } +} + +/* +* Monotonic and real time functions +*/ +static unsigned __stdcall windows_clock_gettime_threaded(void *param) +{ + struct timer_request *request; + LARGE_INTEGER hires_counter; + MSG msg; + + // The following call will create this thread's message queue + // See https://msdn.microsoft.com/en-us/library/windows/desktop/ms644946.aspx + pPeekMessageA(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE); + + // Signal windows_init_clock() that we're ready to service requests + if (!SetEvent((HANDLE)param)) + usbi_dbg("SetEvent failed for timer init event: %s", windows_error_str(0)); + param = NULL; + + // Main loop - wait for requests + while (1) { + if (pGetMessageA(&msg, NULL, WM_TIMER_REQUEST, WM_TIMER_EXIT) == -1) { + usbi_err(NULL, "GetMessage failed for timer thread: %s", windows_error_str(0)); + return 1; + } + + switch (msg.message) { + case WM_TIMER_REQUEST: + // Requests to this thread are for hires always + // Microsoft says that this function always succeeds on XP and later + // See https://msdn.microsoft.com/en-us/library/windows/desktop/ms644904.aspx + request = (struct timer_request *)msg.lParam; + QueryPerformanceCounter(&hires_counter); + request->tp->tv_sec = (long)(hires_counter.QuadPart / hires_frequency); + request->tp->tv_nsec = (long)(((hires_counter.QuadPart % hires_frequency) / 1000) * hires_ticks_to_ps); + if (!SetEvent(request->event)) + usbi_err(NULL, "SetEvent failed for timer request: %s", windows_error_str(0)); + break; + case WM_TIMER_EXIT: + usbi_dbg("timer thread quitting"); + return 0; + } + } +} + +int windows_clock_gettime(int clk_id, struct timespec *tp) +{ + struct timer_request request; +#if !defined(_MSC_VER) || (_MSC_VER < 1900) + FILETIME filetime; + ULARGE_INTEGER rtime; +#endif + DWORD r; + + switch (clk_id) { + case USBI_CLOCK_MONOTONIC: + if (timer_thread) { + request.tp = tp; + request.event = CreateEvent(NULL, FALSE, FALSE, NULL); + if (request.event == NULL) + return LIBUSB_ERROR_NO_MEM; + + if (!pPostThreadMessageA(timer_thread_id, WM_TIMER_REQUEST, 0, (LPARAM)&request)) { + usbi_err(NULL, "PostThreadMessage failed for timer thread: %s", windows_error_str(0)); + CloseHandle(request.event); + return LIBUSB_ERROR_OTHER; + } + + do { + r = WaitForSingleObject(request.event, TIMER_REQUEST_RETRY_MS); + if (r == WAIT_TIMEOUT) + usbi_dbg("could not obtain a timer value within reasonable timeframe - too much load?"); + else if (r == WAIT_FAILED) + usbi_err(NULL, "WaitForSingleObject failed: %s", windows_error_str(0)); + } while (r == WAIT_TIMEOUT); + CloseHandle(request.event); + + if (r == WAIT_OBJECT_0) + return LIBUSB_SUCCESS; + else + return LIBUSB_ERROR_OTHER; + } + // Fall through and return real-time if monotonic was not detected @ timer init + case USBI_CLOCK_REALTIME: +#if defined(_MSC_VER) && (_MSC_VER >= 1900) + timespec_get(tp, TIME_UTC); +#else + // We follow http://msdn.microsoft.com/en-us/library/ms724928%28VS.85%29.aspx + // with a predef epoch time to have an epoch that starts at 1970.01.01 00:00 + // Note however that our resolution is bounded by the Windows system time + // functions and is at best of the order of 1 ms (or, usually, worse) + GetSystemTimeAsFileTime(&filetime); + rtime.LowPart = filetime.dwLowDateTime; + rtime.HighPart = filetime.dwHighDateTime; + rtime.QuadPart -= EPOCH_TIME; + tp->tv_sec = (long)(rtime.QuadPart / 10000000); + tp->tv_nsec = (long)((rtime.QuadPart % 10000000) * 100); +#endif + return LIBUSB_SUCCESS; + default: + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +static void windows_transfer_callback(struct usbi_transfer *itransfer, uint32_t io_result, uint32_t io_size) +{ + int status, istatus; + + usbi_dbg("handling I/O completion with errcode %u, size %u", io_result, io_size); + + switch (io_result) { + case NO_ERROR: + status = windows_copy_transfer_data(itransfer, io_size); + break; + case ERROR_GEN_FAILURE: + usbi_dbg("detected endpoint stall"); + status = LIBUSB_TRANSFER_STALL; + break; + case ERROR_SEM_TIMEOUT: + usbi_dbg("detected semaphore timeout"); + status = LIBUSB_TRANSFER_TIMED_OUT; + break; + case ERROR_OPERATION_ABORTED: + istatus = windows_copy_transfer_data(itransfer, io_size); + if (istatus != LIBUSB_TRANSFER_COMPLETED) + usbi_dbg("Failed to copy partial data in aborted operation: %d", istatus); + + usbi_dbg("detected operation aborted"); + status = LIBUSB_TRANSFER_CANCELLED; + break; + default: + usbi_err(ITRANSFER_CTX(itransfer), "detected I/O error %u: %s", io_result, windows_error_str(io_result)); + status = LIBUSB_TRANSFER_ERROR; + break; + } + windows_clear_transfer_priv(itransfer); // Cancel polling + if (status == LIBUSB_TRANSFER_CANCELLED) + usbi_handle_transfer_cancellation(itransfer); + else + usbi_handle_transfer_completion(itransfer, (enum libusb_transfer_status)status); +} + +void windows_handle_callback(struct usbi_transfer *itransfer, uint32_t io_result, uint32_t io_size) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + windows_transfer_callback(itransfer, io_result, io_size); + break; + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + usbi_warn(ITRANSFER_CTX(itransfer), "bulk stream transfers are not yet supported on this platform"); + break; + default: + usbi_err(ITRANSFER_CTX(itransfer), "unknown endpoint type %d", transfer->type); + } +} + +int windows_handle_events(struct libusb_context *ctx, struct pollfd *fds, POLL_NFDS_TYPE nfds, int num_ready) +{ + POLL_NFDS_TYPE i; + bool found = false; + struct usbi_transfer *transfer; + struct winfd *pollable_fd = NULL; + DWORD io_size, io_result; + int r = LIBUSB_SUCCESS; + + usbi_mutex_lock(&ctx->open_devs_lock); + for (i = 0; i < nfds && num_ready > 0; i++) { + + usbi_dbg("checking fd %d with revents = %04x", fds[i].fd, fds[i].revents); + + if (!fds[i].revents) + continue; + + num_ready--; + + // Because a Windows OVERLAPPED is used for poll emulation, + // a pollable fd is created and stored with each transfer + usbi_mutex_lock(&ctx->flying_transfers_lock); + found = false; + list_for_each_entry(transfer, &ctx->flying_transfers, list, struct usbi_transfer) { + pollable_fd = windows_get_fd(transfer); + if (pollable_fd->fd == fds[i].fd) { + found = true; + break; + } + } + usbi_mutex_unlock(&ctx->flying_transfers_lock); + + if (found) { + windows_get_overlapped_result(transfer, pollable_fd, &io_result, &io_size); + + usbi_remove_pollfd(ctx, pollable_fd->fd); + // let handle_callback free the event using the transfer wfd + // If you don't use the transfer wfd, you run a risk of trying to free a + // newly allocated wfd that took the place of the one from the transfer. + windows_handle_callback(transfer, io_result, io_size); + } else { + usbi_err(ctx, "could not find a matching transfer for fd %d", fds[i]); + r = LIBUSB_ERROR_NOT_FOUND; + break; + } + } + usbi_mutex_unlock(&ctx->open_devs_lock); + + return r; +} + +int windows_common_init(struct libusb_context *ctx) +{ + if (!windows_init_clock(ctx)) + goto error_roll_back; + + if (!htab_create(ctx)) + goto error_roll_back; + + return LIBUSB_SUCCESS; + +error_roll_back: + windows_common_exit(); + return LIBUSB_ERROR_NO_MEM; +} + +void windows_common_exit(void) +{ + htab_destroy(); + windows_destroy_clock(); + windows_exit_dlls(); +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_nt_common.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_nt_common.h new file mode 100644 index 000000000..52ea8708b --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_nt_common.h @@ -0,0 +1,63 @@ +/* + * Windows backend common header for libusb 1.0 + * + * This file brings together header code common between + * the desktop Windows backends. + * Copyright © 2012-2013 RealVNC Ltd. + * Copyright © 2009-2012 Pete Batard + * With contributions from Michael Plante, Orin Eman et al. + * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer + * Major code testing contribution by Xiaofan Chen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#pragma once + +// Missing from MinGW +#if !defined(FACILITY_SETUPAPI) +#define FACILITY_SETUPAPI 15 +#endif + +typedef struct USB_CONFIGURATION_DESCRIPTOR { + UCHAR bLength; + UCHAR bDescriptorType; + USHORT wTotalLength; + UCHAR bNumInterfaces; + UCHAR bConfigurationValue; + UCHAR iConfiguration; + UCHAR bmAttributes; + UCHAR MaxPower; +} USB_CONFIGURATION_DESCRIPTOR, *PUSB_CONFIGURATION_DESCRIPTOR; + +typedef struct libusb_device_descriptor USB_DEVICE_DESCRIPTOR, *PUSB_DEVICE_DESCRIPTOR; + +int windows_common_init(struct libusb_context *ctx); +void windows_common_exit(void); + +unsigned long htab_hash(const char *str); +int windows_clock_gettime(int clk_id, struct timespec *tp); + +void windows_clear_transfer_priv(struct usbi_transfer *itransfer); +int windows_copy_transfer_data(struct usbi_transfer *itransfer, uint32_t io_size); +struct winfd *windows_get_fd(struct usbi_transfer *transfer); +void windows_get_overlapped_result(struct usbi_transfer *transfer, struct winfd *pollable_fd, DWORD *io_result, DWORD *io_size); + +void windows_handle_callback(struct usbi_transfer *itransfer, uint32_t io_result, uint32_t io_size); +int windows_handle_events(struct libusb_context *ctx, struct pollfd *fds, POLL_NFDS_TYPE nfds, int num_ready); + +#if defined(ENABLE_LOGGING) +const char *windows_error_str(DWORD error_code); +#endif diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_usbdk.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_usbdk.c new file mode 100644 index 000000000..7cc579387 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_usbdk.c @@ -0,0 +1,905 @@ +/* + * windows UsbDk backend for libusb 1.0 + * Copyright © 2014 Red Hat, Inc. + + * Authors: + * Dmitry Fleytman + * Pavel Gurvich + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#if defined(USE_USBDK) + +#include +#include +#include + +#include "libusbi.h" +#include "windows_common.h" +#include "windows_nt_common.h" + +#define ULONG64 uint64_t +#define PVOID64 uint64_t + +typedef CONST WCHAR *PCWCHAR; +#define wcsncpy_s wcsncpy + +#include "windows_usbdk.h" + +#if !defined(STATUS_SUCCESS) +typedef LONG NTSTATUS; +#define STATUS_SUCCESS ((NTSTATUS)0x00000000L) +#endif + +#if !defined(STATUS_CANCELLED) +#define STATUS_CANCELLED ((NTSTATUS)0xC0000120L) +#endif + +#if !defined(STATUS_REQUEST_CANCELED) +#define STATUS_REQUEST_CANCELED ((NTSTATUS)0xC0000703L) +#endif + +#if !defined(USBD_SUCCESS) +typedef int32_t USBD_STATUS; +#define USBD_SUCCESS(Status) ((USBD_STATUS) (Status) >= 0) +#define USBD_PENDING(Status) ((ULONG) (Status) >> 30 == 1) +#define USBD_ERROR(Status) ((USBD_STATUS) (Status) < 0) +#define USBD_STATUS_STALL_PID ((USBD_STATUS) 0xc0000004) +#define USBD_STATUS_ENDPOINT_HALTED ((USBD_STATUS) 0xc0000030) +#define USBD_STATUS_BAD_START_FRAME ((USBD_STATUS) 0xc0000a00) +#define USBD_STATUS_TIMEOUT ((USBD_STATUS) 0xc0006000) +#define USBD_STATUS_CANCELED ((USBD_STATUS) 0xc0010000) +#endif + +static int concurrent_usage = -1; + +struct usbdk_device_priv { + USB_DK_DEVICE_INFO info; + PUSB_CONFIGURATION_DESCRIPTOR *config_descriptors; + HANDLE redirector_handle; + uint8_t active_configuration; +}; + +struct usbdk_transfer_priv { + USB_DK_TRANSFER_REQUEST request; + struct winfd pollable_fd; + PULONG64 IsochronousPacketsArray; + PUSB_DK_ISO_TRANSFER_RESULT IsochronousResultsArray; +}; + +static inline struct usbdk_device_priv *_usbdk_device_priv(struct libusb_device *dev) +{ + return (struct usbdk_device_priv *)dev->os_priv; +} + +static inline struct usbdk_transfer_priv *_usbdk_transfer_priv(struct usbi_transfer *itransfer) +{ + return (struct usbdk_transfer_priv *)usbi_transfer_get_os_priv(itransfer); +} + +static struct { + HMODULE module; + + USBDK_GET_DEVICES_LIST GetDevicesList; + USBDK_RELEASE_DEVICES_LIST ReleaseDevicesList; + USBDK_START_REDIRECT StartRedirect; + USBDK_STOP_REDIRECT StopRedirect; + USBDK_GET_CONFIGURATION_DESCRIPTOR GetConfigurationDescriptor; + USBDK_RELEASE_CONFIGURATION_DESCRIPTOR ReleaseConfigurationDescriptor; + USBDK_READ_PIPE ReadPipe; + USBDK_WRITE_PIPE WritePipe; + USBDK_ABORT_PIPE AbortPipe; + USBDK_RESET_PIPE ResetPipe; + USBDK_SET_ALTSETTING SetAltsetting; + USBDK_RESET_DEVICE ResetDevice; + USBDK_GET_REDIRECTOR_SYSTEM_HANDLE GetRedirectorSystemHandle; +} usbdk_helper; + +static FARPROC get_usbdk_proc_addr(struct libusb_context *ctx, LPCSTR api_name) +{ + FARPROC api_ptr = GetProcAddress(usbdk_helper.module, api_name); + + if (api_ptr == NULL) + usbi_err(ctx, "UsbDkHelper API %s not found, error %d", api_name, GetLastError()); + + return api_ptr; +} + +static void unload_usbdk_helper_dll(void) +{ + if (usbdk_helper.module != NULL) { + FreeLibrary(usbdk_helper.module); + usbdk_helper.module = NULL; + } +} + +static int load_usbdk_helper_dll(struct libusb_context *ctx) +{ + usbdk_helper.module = LoadLibraryA("UsbDkHelper"); + if (usbdk_helper.module == NULL) { + usbi_err(ctx, "Failed to load UsbDkHelper.dll, error %d", GetLastError()); + return LIBUSB_ERROR_NOT_FOUND; + } + + usbdk_helper.GetDevicesList = (USBDK_GET_DEVICES_LIST)get_usbdk_proc_addr(ctx, "UsbDk_GetDevicesList"); + if (usbdk_helper.GetDevicesList == NULL) + goto error_unload; + + usbdk_helper.ReleaseDevicesList = (USBDK_RELEASE_DEVICES_LIST)get_usbdk_proc_addr(ctx, "UsbDk_ReleaseDevicesList"); + if (usbdk_helper.ReleaseDevicesList == NULL) + goto error_unload; + + usbdk_helper.StartRedirect = (USBDK_START_REDIRECT)get_usbdk_proc_addr(ctx, "UsbDk_StartRedirect"); + if (usbdk_helper.StartRedirect == NULL) + goto error_unload; + + usbdk_helper.StopRedirect = (USBDK_STOP_REDIRECT)get_usbdk_proc_addr(ctx, "UsbDk_StopRedirect"); + if (usbdk_helper.StopRedirect == NULL) + goto error_unload; + + usbdk_helper.GetConfigurationDescriptor = (USBDK_GET_CONFIGURATION_DESCRIPTOR)get_usbdk_proc_addr(ctx, "UsbDk_GetConfigurationDescriptor"); + if (usbdk_helper.GetConfigurationDescriptor == NULL) + goto error_unload; + + usbdk_helper.ReleaseConfigurationDescriptor = (USBDK_RELEASE_CONFIGURATION_DESCRIPTOR)get_usbdk_proc_addr(ctx, "UsbDk_ReleaseConfigurationDescriptor"); + if (usbdk_helper.ReleaseConfigurationDescriptor == NULL) + goto error_unload; + + usbdk_helper.ReadPipe = (USBDK_READ_PIPE)get_usbdk_proc_addr(ctx, "UsbDk_ReadPipe"); + if (usbdk_helper.ReadPipe == NULL) + goto error_unload; + + usbdk_helper.WritePipe = (USBDK_WRITE_PIPE)get_usbdk_proc_addr(ctx, "UsbDk_WritePipe"); + if (usbdk_helper.WritePipe == NULL) + goto error_unload; + + usbdk_helper.AbortPipe = (USBDK_ABORT_PIPE)get_usbdk_proc_addr(ctx, "UsbDk_AbortPipe"); + if (usbdk_helper.AbortPipe == NULL) + goto error_unload; + + usbdk_helper.ResetPipe = (USBDK_RESET_PIPE)get_usbdk_proc_addr(ctx, "UsbDk_ResetPipe"); + if (usbdk_helper.ResetPipe == NULL) + goto error_unload; + + usbdk_helper.SetAltsetting = (USBDK_SET_ALTSETTING)get_usbdk_proc_addr(ctx, "UsbDk_SetAltsetting"); + if (usbdk_helper.SetAltsetting == NULL) + goto error_unload; + + usbdk_helper.ResetDevice = (USBDK_RESET_DEVICE)get_usbdk_proc_addr(ctx, "UsbDk_ResetDevice"); + if (usbdk_helper.ResetDevice == NULL) + goto error_unload; + + usbdk_helper.GetRedirectorSystemHandle = (USBDK_GET_REDIRECTOR_SYSTEM_HANDLE)get_usbdk_proc_addr(ctx, "UsbDk_GetRedirectorSystemHandle"); + if (usbdk_helper.GetRedirectorSystemHandle == NULL) + goto error_unload; + + return LIBUSB_SUCCESS; + +error_unload: + FreeLibrary(usbdk_helper.module); + usbdk_helper.module = NULL; + return LIBUSB_ERROR_NOT_FOUND; +} + +static int usbdk_init(struct libusb_context *ctx) +{ + int r; + + if (++concurrent_usage == 0) { // First init? + r = load_usbdk_helper_dll(ctx); + if (r) + goto init_exit; + + init_polling(); + + r = windows_common_init(ctx); + if (r) + goto init_exit; + } + // At this stage, either we went through full init successfully, or didn't need to + r = LIBUSB_SUCCESS; + +init_exit: + if (!concurrent_usage && r != LIBUSB_SUCCESS) { // First init failed? + exit_polling(); + windows_common_exit(); + unload_usbdk_helper_dll(); + } + + if (r != LIBUSB_SUCCESS) + --concurrent_usage; // Not expected to call libusb_exit if we failed. + + return r; +} + +static int usbdk_get_session_id_for_device(struct libusb_context *ctx, + PUSB_DK_DEVICE_ID id, unsigned long *session_id) +{ + char dev_identity[ARRAYSIZE(id->DeviceID) + ARRAYSIZE(id->InstanceID)]; + + if (sprintf(dev_identity, "%S%S", id->DeviceID, id->InstanceID) == -1) { + usbi_warn(ctx, "cannot form device identity", id->DeviceID); + return LIBUSB_ERROR_NOT_SUPPORTED; + } + + *session_id = htab_hash(dev_identity); + + return LIBUSB_SUCCESS; +} + +static void usbdk_release_config_descriptors(struct usbdk_device_priv *p, uint8_t count) +{ + uint8_t i; + + for (i = 0; i < count; i++) + usbdk_helper.ReleaseConfigurationDescriptor(p->config_descriptors[i]); + + free(p->config_descriptors); + p->config_descriptors = NULL; +} + +static int usbdk_cache_config_descriptors(struct libusb_context *ctx, + struct usbdk_device_priv *p, PUSB_DK_DEVICE_INFO info) +{ + uint8_t i; + USB_DK_CONFIG_DESCRIPTOR_REQUEST Request; + Request.ID = info->ID; + + p->config_descriptors = calloc(info->DeviceDescriptor.bNumConfigurations, sizeof(PUSB_CONFIGURATION_DESCRIPTOR)); + if (p->config_descriptors == NULL) { + usbi_err(ctx, "failed to allocate configuration descriptors holder"); + return LIBUSB_ERROR_NO_MEM; + } + + for (i = 0; i < info->DeviceDescriptor.bNumConfigurations; i++) { + ULONG Length; + + Request.Index = i; + if (!usbdk_helper.GetConfigurationDescriptor(&Request, &p->config_descriptors[i], &Length)) { + usbi_err(ctx, "failed to retrieve configuration descriptors"); + usbdk_release_config_descriptors(p, i); + return LIBUSB_ERROR_OTHER; + } + } + + return LIBUSB_SUCCESS; +} + +static inline int usbdk_device_priv_init(struct libusb_context *ctx, struct libusb_device *dev, PUSB_DK_DEVICE_INFO info) +{ + struct usbdk_device_priv *p = _usbdk_device_priv(dev); + + p->info = *info; + p->active_configuration = 0; + + return usbdk_cache_config_descriptors(ctx, p, info); +} + +static void usbdk_device_init(libusb_device *dev, PUSB_DK_DEVICE_INFO info) +{ + dev->bus_number = (uint8_t)info->FilterID; + dev->port_number = (uint8_t)info->Port; + dev->parent_dev = NULL; + + //Addresses in libusb are 1-based + dev->device_address = (uint8_t)(info->Port + 1); + + dev->num_configurations = info->DeviceDescriptor.bNumConfigurations; + dev->device_descriptor = info->DeviceDescriptor; + + switch (info->Speed) { + case LowSpeed: + dev->speed = LIBUSB_SPEED_LOW; + break; + case FullSpeed: + dev->speed = LIBUSB_SPEED_FULL; + break; + case HighSpeed: + dev->speed = LIBUSB_SPEED_HIGH; + break; + case SuperSpeed: + dev->speed = LIBUSB_SPEED_SUPER; + break; + case NoSpeed: + default: + dev->speed = LIBUSB_SPEED_UNKNOWN; + break; + } +} + +static int usbdk_get_device_list(struct libusb_context *ctx, struct discovered_devs **_discdevs) +{ + int r = LIBUSB_SUCCESS; + ULONG i; + struct discovered_devs *discdevs = NULL; + ULONG dev_number; + PUSB_DK_DEVICE_INFO devices; + + if(!usbdk_helper.GetDevicesList(&devices, &dev_number)) + return LIBUSB_ERROR_OTHER; + + for (i = 0; i < dev_number; i++) { + unsigned long session_id; + struct libusb_device *dev = NULL; + + if (usbdk_get_session_id_for_device(ctx, &devices[i].ID, &session_id)) + continue; + + dev = usbi_get_device_by_session_id(ctx, session_id); + if (dev == NULL) { + dev = usbi_alloc_device(ctx, session_id); + if (dev == NULL) { + usbi_err(ctx, "failed to allocate a new device structure"); + continue; + } + + usbdk_device_init(dev, &devices[i]); + if (usbdk_device_priv_init(ctx, dev, &devices[i]) != LIBUSB_SUCCESS) { + libusb_unref_device(dev); + continue; + } + } + + discdevs = discovered_devs_append(*_discdevs, dev); + libusb_unref_device(dev); + if (!discdevs) { + usbi_err(ctx, "cannot append new device to list"); + r = LIBUSB_ERROR_NO_MEM; + goto func_exit; + } + + *_discdevs = discdevs; + } + +func_exit: + usbdk_helper.ReleaseDevicesList(devices); + return r; +} + +static void usbdk_exit(void) +{ + if (--concurrent_usage < 0) { + windows_common_exit(); + exit_polling(); + unload_usbdk_helper_dll(); + } +} + +static int usbdk_get_device_descriptor(struct libusb_device *dev, unsigned char *buffer, int *host_endian) +{ + struct usbdk_device_priv *priv = _usbdk_device_priv(dev); + + memcpy(buffer, &priv->info.DeviceDescriptor, DEVICE_DESC_LENGTH); + *host_endian = 0; + + return LIBUSB_SUCCESS; +} + +static int usbdk_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, unsigned char *buffer, size_t len, int *host_endian) +{ + struct usbdk_device_priv *priv = _usbdk_device_priv(dev); + PUSB_CONFIGURATION_DESCRIPTOR config_header; + size_t size; + + if (config_index >= dev->num_configurations) + return LIBUSB_ERROR_INVALID_PARAM; + + config_header = (PUSB_CONFIGURATION_DESCRIPTOR)priv->config_descriptors[config_index]; + + size = min(config_header->wTotalLength, len); + memcpy(buffer, config_header, size); + *host_endian = 0; + + return (int)size; +} + +static inline int usbdk_get_active_config_descriptor(struct libusb_device *dev, unsigned char *buffer, size_t len, int *host_endian) +{ + return usbdk_get_config_descriptor(dev, _usbdk_device_priv(dev)->active_configuration, + buffer, len, host_endian); +} + +static int usbdk_open(struct libusb_device_handle *dev_handle) +{ + struct usbdk_device_priv *priv = _usbdk_device_priv(dev_handle->dev); + + priv->redirector_handle = usbdk_helper.StartRedirect(&priv->info.ID); + if (priv->redirector_handle == INVALID_HANDLE_VALUE) { + usbi_err(DEVICE_CTX(dev_handle->dev), "Redirector startup failed"); + return LIBUSB_ERROR_OTHER; + } + + return LIBUSB_SUCCESS; +} + +static void usbdk_close(struct libusb_device_handle *dev_handle) +{ + struct usbdk_device_priv *priv = _usbdk_device_priv(dev_handle->dev); + + if (!usbdk_helper.StopRedirect(priv->redirector_handle)) { + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + usbi_err(ctx, "Redirector shutdown failed"); + } +} + +static int usbdk_get_configuration(struct libusb_device_handle *dev_handle, int *config) +{ + *config = _usbdk_device_priv(dev_handle->dev)->active_configuration; + + return LIBUSB_SUCCESS; +} + +static int usbdk_set_configuration(struct libusb_device_handle *dev_handle, int config) +{ + UNUSED(dev_handle); + UNUSED(config); + return LIBUSB_SUCCESS; +} + +static int usbdk_claim_interface(struct libusb_device_handle *dev_handle, int iface) +{ + UNUSED(dev_handle); + UNUSED(iface); + return LIBUSB_SUCCESS; +} + +static int usbdk_set_interface_altsetting(struct libusb_device_handle *dev_handle, int iface, int altsetting) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct usbdk_device_priv *priv = _usbdk_device_priv(dev_handle->dev); + + if (!usbdk_helper.SetAltsetting(priv->redirector_handle, iface, altsetting)) { + usbi_err(ctx, "SetAltsetting failed: %s", windows_error_str(0)); + return LIBUSB_ERROR_NO_DEVICE; + } + + return LIBUSB_SUCCESS; +} + +static int usbdk_release_interface(struct libusb_device_handle *dev_handle, int iface) +{ + UNUSED(dev_handle); + UNUSED(iface); + return LIBUSB_SUCCESS; +} + +static int usbdk_clear_halt(struct libusb_device_handle *dev_handle, unsigned char endpoint) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct usbdk_device_priv *priv = _usbdk_device_priv(dev_handle->dev); + + if (!usbdk_helper.ResetPipe(priv->redirector_handle, endpoint)) { + usbi_err(ctx, "ResetPipe failed: %s", windows_error_str(0)); + return LIBUSB_ERROR_NO_DEVICE; + } + + return LIBUSB_SUCCESS; +} + +static int usbdk_reset_device(struct libusb_device_handle *dev_handle) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct usbdk_device_priv *priv = _usbdk_device_priv(dev_handle->dev); + + if (!usbdk_helper.ResetDevice(priv->redirector_handle)) { + usbi_err(ctx, "ResetDevice failed: %s", windows_error_str(0)); + return LIBUSB_ERROR_NO_DEVICE; + } + + return LIBUSB_SUCCESS; +} + +static int usbdk_kernel_driver_active(struct libusb_device_handle *dev_handle, int iface) +{ + UNUSED(dev_handle); + UNUSED(iface); + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +static int usbdk_attach_kernel_driver(struct libusb_device_handle *dev_handle, int iface) +{ + UNUSED(dev_handle); + UNUSED(iface); + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +static int usbdk_detach_kernel_driver(struct libusb_device_handle *dev_handle, int iface) +{ + UNUSED(dev_handle); + UNUSED(iface); + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +static void usbdk_destroy_device(struct libusb_device *dev) +{ + struct usbdk_device_priv* p = _usbdk_device_priv(dev); + + if (p->config_descriptors != NULL) + usbdk_release_config_descriptors(p, p->info.DeviceDescriptor.bNumConfigurations); +} + +void windows_clear_transfer_priv(struct usbi_transfer *itransfer) +{ + struct usbdk_transfer_priv *transfer_priv = _usbdk_transfer_priv(itransfer); + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + usbi_free_fd(&transfer_priv->pollable_fd); + + if (transfer->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS) { + safe_free(transfer_priv->IsochronousPacketsArray); + safe_free(transfer_priv->IsochronousResultsArray); + } +} + +static int usbdk_do_control_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct usbdk_device_priv *priv = _usbdk_device_priv(transfer->dev_handle->dev); + struct usbdk_transfer_priv *transfer_priv = _usbdk_transfer_priv(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct winfd wfd; + ULONG Length; + TransferResult transResult; + HANDLE sysHandle; + + sysHandle = usbdk_helper.GetRedirectorSystemHandle(priv->redirector_handle); + + wfd = usbi_create_fd(sysHandle, RW_READ, NULL, NULL); + // Always use the handle returned from usbi_create_fd (wfd.handle) + if (wfd.fd < 0) + return LIBUSB_ERROR_NO_MEM; + + transfer_priv->request.Buffer = (PVOID64)(uintptr_t)transfer->buffer; + transfer_priv->request.BufferLength = transfer->length; + transfer_priv->request.TransferType = ControlTransferType; + transfer_priv->pollable_fd = INVALID_WINFD; + Length = (ULONG)transfer->length; + + if (IS_XFERIN(transfer)) + transResult = usbdk_helper.ReadPipe(priv->redirector_handle, &transfer_priv->request, wfd.overlapped); + else + transResult = usbdk_helper.WritePipe(priv->redirector_handle, &transfer_priv->request, wfd.overlapped); + + switch (transResult) { + case TransferSuccess: + wfd.overlapped->Internal = STATUS_COMPLETED_SYNCHRONOUSLY; + wfd.overlapped->InternalHigh = (DWORD)Length; + break; + case TransferSuccessAsync: + break; + case TransferFailure: + usbi_err(ctx, "ControlTransfer failed: %s", windows_error_str(0)); + usbi_free_fd(&wfd); + return LIBUSB_ERROR_IO; + } + + // Use priv_transfer to store data needed for async polling + transfer_priv->pollable_fd = wfd; + usbi_add_pollfd(ctx, transfer_priv->pollable_fd.fd, POLLIN); + + return LIBUSB_SUCCESS; +} + +static int usbdk_do_bulk_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct usbdk_device_priv *priv = _usbdk_device_priv(transfer->dev_handle->dev); + struct usbdk_transfer_priv *transfer_priv = _usbdk_transfer_priv(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct winfd wfd; + TransferResult transferRes; + HANDLE sysHandle; + + transfer_priv->request.Buffer = (PVOID64)(uintptr_t)transfer->buffer; + transfer_priv->request.BufferLength = transfer->length; + transfer_priv->request.EndpointAddress = transfer->endpoint; + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_BULK: + transfer_priv->request.TransferType = BulkTransferType; + break; + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + transfer_priv->request.TransferType = IntertuptTransferType; + break; + default: + usbi_err(ctx, "Wrong transfer type (%d) in usbdk_do_bulk_transfer. %s", transfer->type, windows_error_str(0)); + return LIBUSB_ERROR_INVALID_PARAM; + } + + transfer_priv->pollable_fd = INVALID_WINFD; + + sysHandle = usbdk_helper.GetRedirectorSystemHandle(priv->redirector_handle); + + wfd = usbi_create_fd(sysHandle, IS_XFERIN(transfer) ? RW_READ : RW_WRITE, NULL, NULL); + // Always use the handle returned from usbi_create_fd (wfd.handle) + if (wfd.fd < 0) + return LIBUSB_ERROR_NO_MEM; + + if (IS_XFERIN(transfer)) + transferRes = usbdk_helper.ReadPipe(priv->redirector_handle, &transfer_priv->request, wfd.overlapped); + else + transferRes = usbdk_helper.WritePipe(priv->redirector_handle, &transfer_priv->request, wfd.overlapped); + + switch (transferRes) { + case TransferSuccess: + wfd.overlapped->Internal = STATUS_COMPLETED_SYNCHRONOUSLY; + break; + case TransferSuccessAsync: + break; + case TransferFailure: + usbi_err(ctx, "ReadPipe/WritePipe failed: %s", windows_error_str(0)); + usbi_free_fd(&wfd); + return LIBUSB_ERROR_IO; + } + + transfer_priv->pollable_fd = wfd; + usbi_add_pollfd(ctx, transfer_priv->pollable_fd.fd, IS_XFERIN(transfer) ? POLLIN : POLLOUT); + + return LIBUSB_SUCCESS; +} + +static int usbdk_do_iso_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct usbdk_device_priv *priv = _usbdk_device_priv(transfer->dev_handle->dev); + struct usbdk_transfer_priv *transfer_priv = _usbdk_transfer_priv(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct winfd wfd; + TransferResult transferRes; + int i; + HANDLE sysHandle; + + transfer_priv->request.Buffer = (PVOID64)(uintptr_t)transfer->buffer; + transfer_priv->request.BufferLength = transfer->length; + transfer_priv->request.EndpointAddress = transfer->endpoint; + transfer_priv->request.TransferType = IsochronousTransferType; + transfer_priv->request.IsochronousPacketsArraySize = transfer->num_iso_packets; + transfer_priv->IsochronousPacketsArray = malloc(transfer->num_iso_packets * sizeof(ULONG64)); + transfer_priv->request.IsochronousPacketsArray = (PVOID64)(uintptr_t)transfer_priv->IsochronousPacketsArray; + if (!transfer_priv->IsochronousPacketsArray) { + usbi_err(ctx, "Allocation of IsochronousPacketsArray is failed, %s", windows_error_str(0)); + return LIBUSB_ERROR_IO; + } + + transfer_priv->IsochronousResultsArray = malloc(transfer->num_iso_packets * sizeof(USB_DK_ISO_TRANSFER_RESULT)); + transfer_priv->request.Result.IsochronousResultsArray = (PVOID64)(uintptr_t)transfer_priv->IsochronousResultsArray; + if (!transfer_priv->IsochronousResultsArray) { + usbi_err(ctx, "Allocation of isochronousResultsArray is failed, %s", windows_error_str(0)); + free(transfer_priv->IsochronousPacketsArray); + return LIBUSB_ERROR_IO; + } + + for (i = 0; i < transfer->num_iso_packets; i++) + transfer_priv->IsochronousPacketsArray[i] = transfer->iso_packet_desc[i].length; + + transfer_priv->pollable_fd = INVALID_WINFD; + + sysHandle = usbdk_helper.GetRedirectorSystemHandle(priv->redirector_handle); + + wfd = usbi_create_fd(sysHandle, IS_XFERIN(transfer) ? RW_READ : RW_WRITE, NULL, NULL); + // Always use the handle returned from usbi_create_fd (wfd.handle) + if (wfd.fd < 0) { + free(transfer_priv->IsochronousPacketsArray); + free(transfer_priv->IsochronousResultsArray); + return LIBUSB_ERROR_NO_MEM; + } + + if (IS_XFERIN(transfer)) + transferRes = usbdk_helper.ReadPipe(priv->redirector_handle, &transfer_priv->request, wfd.overlapped); + else + transferRes = usbdk_helper.WritePipe(priv->redirector_handle, &transfer_priv->request, wfd.overlapped); + + switch (transferRes) { + case TransferSuccess: + wfd.overlapped->Internal = STATUS_COMPLETED_SYNCHRONOUSLY; + break; + case TransferSuccessAsync: + break; + case TransferFailure: + usbi_err(ctx, "ReadPipe/WritePipe failed: %s", windows_error_str(0)); + usbi_free_fd(&wfd); + free(transfer_priv->IsochronousPacketsArray); + free(transfer_priv->IsochronousResultsArray); + return LIBUSB_ERROR_IO; + } + + transfer_priv->pollable_fd = wfd; + usbi_add_pollfd(ctx, transfer_priv->pollable_fd.fd, IS_XFERIN(transfer) ? POLLIN : POLLOUT); + + return LIBUSB_SUCCESS; +} + +static int usbdk_submit_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + return usbdk_do_control_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + if (IS_XFEROUT(transfer) && (transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET)) + return LIBUSB_ERROR_NOT_SUPPORTED; //TODO: Check whether we can support this in UsbDk + else + return usbdk_do_bulk_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + return usbdk_do_iso_transfer(itransfer); + default: + usbi_err(TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type); + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +static int usbdk_abort_transfers(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct usbdk_device_priv *priv = _usbdk_device_priv(transfer->dev_handle->dev); + + if (!usbdk_helper.AbortPipe(priv->redirector_handle, transfer->endpoint)) { + usbi_err(ctx, "AbortPipe failed: %s", windows_error_str(0)); + return LIBUSB_ERROR_NO_DEVICE; + } + + return LIBUSB_SUCCESS; +} + +static int usbdk_cancel_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + // Control transfers cancelled by IoCancelXXX() API + // No special treatment needed + return LIBUSB_SUCCESS; + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + return usbdk_abort_transfers(itransfer); + default: + usbi_err(ITRANSFER_CTX(itransfer), "unknown endpoint type %d", transfer->type); + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +int windows_copy_transfer_data(struct usbi_transfer *itransfer, uint32_t io_size) +{ + itransfer->transferred += io_size; + return LIBUSB_TRANSFER_COMPLETED; +} + +struct winfd *windows_get_fd(struct usbi_transfer *transfer) +{ + struct usbdk_transfer_priv *transfer_priv = _usbdk_transfer_priv(transfer); + return &transfer_priv->pollable_fd; +} + +static DWORD usbdk_translate_usbd_status(USBD_STATUS UsbdStatus) +{ + if (USBD_SUCCESS(UsbdStatus)) + return NO_ERROR; + + switch (UsbdStatus) { + case USBD_STATUS_STALL_PID: + case USBD_STATUS_ENDPOINT_HALTED: + case USBD_STATUS_BAD_START_FRAME: + return ERROR_GEN_FAILURE; + case USBD_STATUS_TIMEOUT: + return ERROR_SEM_TIMEOUT; + case USBD_STATUS_CANCELED: + return ERROR_OPERATION_ABORTED; + default: + return ERROR_FUNCTION_FAILED; + } +} + +void windows_get_overlapped_result(struct usbi_transfer *transfer, struct winfd *pollable_fd, DWORD *io_result, DWORD *io_size) +{ + if (HasOverlappedIoCompletedSync(pollable_fd->overlapped) // Handle async requests that completed synchronously first + || GetOverlappedResult(pollable_fd->handle, pollable_fd->overlapped, io_size, false)) { // Regular async overlapped + struct libusb_transfer *ltransfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer); + struct usbdk_transfer_priv *transfer_priv = _usbdk_transfer_priv(transfer); + + if (ltransfer->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS) { + int i; + for (i = 0; i < transfer_priv->request.IsochronousPacketsArraySize; i++) { + struct libusb_iso_packet_descriptor *lib_desc = <ransfer->iso_packet_desc[i]; + + switch (transfer_priv->IsochronousResultsArray[i].TransferResult) { + case STATUS_SUCCESS: + case STATUS_CANCELLED: + case STATUS_REQUEST_CANCELED: + lib_desc->status = LIBUSB_TRANSFER_COMPLETED; // == ERROR_SUCCESS + break; + default: + lib_desc->status = LIBUSB_TRANSFER_ERROR; // ERROR_UNKNOWN_EXCEPTION; + break; + } + + lib_desc->actual_length = (unsigned int)transfer_priv->IsochronousResultsArray[i].ActualLength; + } + } + + *io_size = (DWORD) transfer_priv->request.Result.GenResult.BytesTransferred; + *io_result = usbdk_translate_usbd_status((USBD_STATUS) transfer_priv->request.Result.GenResult.UsbdStatus); + } + else { + *io_result = GetLastError(); + } +} + +static int usbdk_clock_gettime(int clk_id, struct timespec *tp) +{ + return windows_clock_gettime(clk_id, tp); +} + +const struct usbi_os_backend usbdk_backend = { + "Windows", + USBI_CAP_HAS_HID_ACCESS, + usbdk_init, + usbdk_exit, + + usbdk_get_device_list, + NULL, + usbdk_open, + usbdk_close, + + usbdk_get_device_descriptor, + usbdk_get_active_config_descriptor, + usbdk_get_config_descriptor, + NULL, + + usbdk_get_configuration, + usbdk_set_configuration, + usbdk_claim_interface, + usbdk_release_interface, + + usbdk_set_interface_altsetting, + usbdk_clear_halt, + usbdk_reset_device, + + NULL, + NULL, + + NULL, // dev_mem_alloc() + NULL, // dev_mem_free() + + usbdk_kernel_driver_active, + usbdk_detach_kernel_driver, + usbdk_attach_kernel_driver, + + usbdk_destroy_device, + + usbdk_submit_transfer, + usbdk_cancel_transfer, + windows_clear_transfer_priv, + + windows_handle_events, + NULL, + + usbdk_clock_gettime, +#if defined(USBI_TIMERFD_AVAILABLE) + NULL, +#endif + sizeof(struct usbdk_device_priv), + 0, + sizeof(struct usbdk_transfer_priv), +}; + +#endif /* USE_USBDK */ diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_usbdk.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_usbdk.h new file mode 100644 index 000000000..04a9787f2 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_usbdk.h @@ -0,0 +1,146 @@ +/* +* windows UsbDk backend for libusb 1.0 +* Copyright © 2014 Red Hat, Inc. + +* Authors: +* Dmitry Fleytman +* Pavel Gurvich +* +* This library is free software; you can redistribute it and/or +* modify it under the terms of the GNU Lesser General Public +* License as published by the Free Software Foundation; either +* version 2.1 of the License, or (at your option) any later version. +* +* This library is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +* Lesser General Public License for more details. +* +* You should have received a copy of the GNU Lesser General Public +* License along with this library; if not, write to the Free Software +* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA +*/ + +#pragma once + +typedef struct tag_USB_DK_DEVICE_ID { + WCHAR DeviceID[MAX_DEVICE_ID_LEN]; + WCHAR InstanceID[MAX_DEVICE_ID_LEN]; +} USB_DK_DEVICE_ID, *PUSB_DK_DEVICE_ID; + +static inline void UsbDkFillIDStruct(USB_DK_DEVICE_ID *ID, PCWCHAR DeviceID, PCWCHAR InstanceID) +{ + wcsncpy_s(ID->DeviceID, DeviceID, MAX_DEVICE_ID_LEN); + wcsncpy_s(ID->InstanceID, InstanceID, MAX_DEVICE_ID_LEN); +} + +typedef struct tag_USB_DK_DEVICE_INFO { + USB_DK_DEVICE_ID ID; + ULONG64 FilterID; + ULONG64 Port; + ULONG64 Speed; + USB_DEVICE_DESCRIPTOR DeviceDescriptor; +} USB_DK_DEVICE_INFO, *PUSB_DK_DEVICE_INFO; + +typedef struct tag_USB_DK_CONFIG_DESCRIPTOR_REQUEST { + USB_DK_DEVICE_ID ID; + ULONG64 Index; +} USB_DK_CONFIG_DESCRIPTOR_REQUEST, *PUSB_DK_CONFIG_DESCRIPTOR_REQUEST; + +typedef struct tag_USB_DK_ISO_TRANSFER_RESULT { + ULONG64 ActualLength; + ULONG64 TransferResult; +} USB_DK_ISO_TRANSFER_RESULT, *PUSB_DK_ISO_TRANSFER_RESULT; + +typedef struct tag_USB_DK_GEN_TRANSFER_RESULT { + ULONG64 BytesTransferred; + ULONG64 UsbdStatus; // USBD_STATUS code +} USB_DK_GEN_TRANSFER_RESULT, *PUSB_DK_GEN_TRANSFER_RESULT; + +typedef struct tag_USB_DK_TRANSFER_RESULT { + USB_DK_GEN_TRANSFER_RESULT GenResult; + PVOID64 IsochronousResultsArray; // array of USB_DK_ISO_TRANSFER_RESULT +} USB_DK_TRANSFER_RESULT, *PUSB_DK_TRANSFER_RESULT; + +typedef struct tag_USB_DK_TRANSFER_REQUEST { + ULONG64 EndpointAddress; + PVOID64 Buffer; + ULONG64 BufferLength; + ULONG64 TransferType; + ULONG64 IsochronousPacketsArraySize; + PVOID64 IsochronousPacketsArray; + + USB_DK_TRANSFER_RESULT Result; +} USB_DK_TRANSFER_REQUEST, *PUSB_DK_TRANSFER_REQUEST; + +typedef enum { + TransferFailure = 0, + TransferSuccess, + TransferSuccessAsync +} TransferResult; + +typedef enum { + NoSpeed = 0, + LowSpeed, + FullSpeed, + HighSpeed, + SuperSpeed +} USB_DK_DEVICE_SPEED; + +typedef enum { + ControlTransferType, + BulkTransferType, + IntertuptTransferType, + IsochronousTransferType +} USB_DK_TRANSFER_TYPE; + +typedef BOOL (__cdecl *USBDK_GET_DEVICES_LIST)( + PUSB_DK_DEVICE_INFO *DeviceInfo, + PULONG DeviceNumber +); +typedef void (__cdecl *USBDK_RELEASE_DEVICES_LIST)( + PUSB_DK_DEVICE_INFO DeviceInfo +); +typedef HANDLE (__cdecl *USBDK_START_REDIRECT)( + PUSB_DK_DEVICE_ID DeviceId +); +typedef BOOL (__cdecl *USBDK_STOP_REDIRECT)( + HANDLE DeviceHandle +); +typedef BOOL (__cdecl *USBDK_GET_CONFIGURATION_DESCRIPTOR)( + PUSB_DK_CONFIG_DESCRIPTOR_REQUEST Request, + PUSB_CONFIGURATION_DESCRIPTOR *Descriptor, + PULONG Length +); +typedef void (__cdecl *USBDK_RELEASE_CONFIGURATION_DESCRIPTOR)( + PUSB_CONFIGURATION_DESCRIPTOR Descriptor +); +typedef TransferResult (__cdecl *USBDK_WRITE_PIPE)( + HANDLE DeviceHandle, + PUSB_DK_TRANSFER_REQUEST Request, + LPOVERLAPPED lpOverlapped +); +typedef TransferResult (__cdecl *USBDK_READ_PIPE)( + HANDLE DeviceHandle, + PUSB_DK_TRANSFER_REQUEST Request, + LPOVERLAPPED lpOverlapped +); +typedef BOOL (__cdecl *USBDK_ABORT_PIPE)( + HANDLE DeviceHandle, + ULONG64 PipeAddress +); +typedef BOOL (__cdecl *USBDK_RESET_PIPE)( + HANDLE DeviceHandle, + ULONG64 PipeAddress +); +typedef BOOL (__cdecl *USBDK_SET_ALTSETTING)( + HANDLE DeviceHandle, + ULONG64 InterfaceIdx, + ULONG64 AltSettingIdx +); +typedef BOOL (__cdecl *USBDK_RESET_DEVICE)( + HANDLE DeviceHandle +); +typedef HANDLE (__cdecl *USBDK_GET_REDIRECTOR_SYSTEM_HANDLE)( + HANDLE DeviceHandle +); diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_winusb.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_winusb.c new file mode 100644 index 000000000..0dce0ea6c --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_winusb.c @@ -0,0 +1,4290 @@ +/* + * windows backend for libusb 1.0 + * Copyright © 2009-2012 Pete Batard + * With contributions from Michael Plante, Orin Eman et al. + * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer + * HID Reports IOCTLs inspired from HIDAPI by Alan Ott, Signal 11 Software + * Hash table functions adapted from glibc, by Ulrich Drepper et al. + * Major code testing contribution by Xiaofan Chen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#if !defined(USE_USBDK) + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "libusbi.h" +#include "poll_windows.h" +#include "windows_winusb.h" + +#define HANDLE_VALID(h) (((h) != 0) && ((h) != INVALID_HANDLE_VALUE)) + +// The 2 macros below are used in conjunction with safe loops. +#define LOOP_CHECK(fcall) \ + { \ + r = fcall; \ + if (r != LIBUSB_SUCCESS) \ + continue; \ + } +#define LOOP_BREAK(err) \ + { \ + r = err; \ + continue; \ + } + +// WinUSB-like API prototypes +static int winusbx_init(int sub_api, struct libusb_context *ctx); +static int winusbx_exit(int sub_api); +static int winusbx_open(int sub_api, struct libusb_device_handle *dev_handle); +static void winusbx_close(int sub_api, struct libusb_device_handle *dev_handle); +static int winusbx_configure_endpoints(int sub_api, struct libusb_device_handle *dev_handle, int iface); +static int winusbx_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface); +static int winusbx_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface); +static int winusbx_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer); +static int winusbx_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting); +static int winusbx_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer); +static int winusbx_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint); +static int winusbx_abort_transfers(int sub_api, struct usbi_transfer *itransfer); +static int winusbx_abort_control(int sub_api, struct usbi_transfer *itransfer); +static int winusbx_reset_device(int sub_api, struct libusb_device_handle *dev_handle); +static int winusbx_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size); +// HID API prototypes +static int hid_init(int sub_api, struct libusb_context *ctx); +static int hid_exit(int sub_api); +static int hid_open(int sub_api, struct libusb_device_handle *dev_handle); +static void hid_close(int sub_api, struct libusb_device_handle *dev_handle); +static int hid_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface); +static int hid_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface); +static int hid_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting); +static int hid_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer); +static int hid_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer); +static int hid_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint); +static int hid_abort_transfers(int sub_api, struct usbi_transfer *itransfer); +static int hid_reset_device(int sub_api, struct libusb_device_handle *dev_handle); +static int hid_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size); +// Composite API prototypes +static int composite_init(int sub_api, struct libusb_context *ctx); +static int composite_exit(int sub_api); +static int composite_open(int sub_api, struct libusb_device_handle *dev_handle); +static void composite_close(int sub_api, struct libusb_device_handle *dev_handle); +static int composite_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface); +static int composite_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting); +static int composite_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface); +static int composite_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer); +static int composite_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer); +static int composite_submit_iso_transfer(int sub_api, struct usbi_transfer *itransfer); +static int composite_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint); +static int composite_abort_transfers(int sub_api, struct usbi_transfer *itransfer); +static int composite_abort_control(int sub_api, struct usbi_transfer *itransfer); +static int composite_reset_device(int sub_api, struct libusb_device_handle *dev_handle); +static int composite_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size); + + +// Global variables +int windows_version = WINDOWS_UNDEFINED; +static char windows_version_str[128] = "Undefined"; +// Concurrency +static int concurrent_usage = -1; +static usbi_mutex_t autoclaim_lock; +// API globals +#define CHECK_WINUSBX_AVAILABLE(sub_api) \ + do { \ + if (sub_api == SUB_API_NOTSET) \ + sub_api = priv->sub_api; \ + if (!WinUSBX[sub_api].initialized) \ + return LIBUSB_ERROR_ACCESS; \ + } while(0) + +static HMODULE WinUSBX_handle = NULL; +static struct winusb_interface WinUSBX[SUB_API_MAX]; +static const char *sub_api_name[SUB_API_MAX] = WINUSBX_DRV_NAMES; + +static bool api_hid_available = false; +#define CHECK_HID_AVAILABLE \ + do { \ + if (!api_hid_available) \ + return LIBUSB_ERROR_ACCESS; \ + } while (0) + +static inline BOOLEAN guid_eq(const GUID *guid1, const GUID *guid2) +{ + if ((guid1 != NULL) && (guid2 != NULL)) + return (memcmp(guid1, guid2, sizeof(GUID)) == 0); + + return false; +} + +#if defined(ENABLE_LOGGING) +static char *guid_to_string(const GUID *guid) +{ + static char guid_string[MAX_GUID_STRING_LENGTH]; + + if (guid == NULL) + return NULL; + + sprintf(guid_string, "{%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X}", + (unsigned int)guid->Data1, guid->Data2, guid->Data3, + guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3], + guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7]); + + return guid_string; +} +#endif + +/* + * Sanitize Microsoft's paths: convert to uppercase, add prefix and fix backslashes. + * Return an allocated sanitized string or NULL on error. + */ +static char *sanitize_path(const char *path) +{ + const char root_prefix[] = { '\\', '\\', '.', '\\' }; + size_t j, size; + char *ret_path; + size_t add_root = 0; + + if (path == NULL) + return NULL; + + size = strlen(path) + 1; + + // Microsoft indiscriminately uses '\\?\', '\\.\', '##?#" or "##.#" for root prefixes. + if (!((size > 3) && (((path[0] == '\\') && (path[1] == '\\') && (path[3] == '\\')) + || ((path[0] == '#') && (path[1] == '#') && (path[3] == '#'))))) { + add_root = sizeof(root_prefix); + size += add_root; + } + + ret_path = malloc(size); + if (ret_path == NULL) + return NULL; + + strcpy(&ret_path[add_root], path); + + // Ensure consistency with root prefix + memcpy(ret_path, root_prefix, sizeof(root_prefix)); + + // Same goes for '\' and '#' after the root prefix. Ensure '#' is used + for (j = sizeof(root_prefix); j < size; j++) { + ret_path[j] = (char)toupper((int)ret_path[j]); // Fix case too + if (ret_path[j] == '\\') + ret_path[j] = '#'; + } + + return ret_path; +} + +/* + * Cfgmgr32, OLE32 and SetupAPI DLL functions + */ +static int init_dlls(void) +{ + DLL_GET_HANDLE(Cfgmgr32); + DLL_LOAD_FUNC(Cfgmgr32, CM_Get_Parent, TRUE); + DLL_LOAD_FUNC(Cfgmgr32, CM_Get_Child, TRUE); + DLL_LOAD_FUNC(Cfgmgr32, CM_Get_Sibling, TRUE); + DLL_LOAD_FUNC(Cfgmgr32, CM_Get_Device_IDA, TRUE); + + // Prefixed to avoid conflict with header files + DLL_GET_HANDLE(AdvAPI32); + DLL_LOAD_FUNC_PREFIXED(AdvAPI32, p, RegQueryValueExW, TRUE); + DLL_LOAD_FUNC_PREFIXED(AdvAPI32, p, RegCloseKey, TRUE); + + DLL_GET_HANDLE(Kernel32); + DLL_LOAD_FUNC_PREFIXED(Kernel32, p, IsWow64Process, FALSE); + + DLL_GET_HANDLE(OLE32); + DLL_LOAD_FUNC_PREFIXED(OLE32, p, CLSIDFromString, TRUE); + + DLL_GET_HANDLE(SetupAPI); + DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiGetClassDevsA, TRUE); + DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiEnumDeviceInfo, TRUE); + DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiEnumDeviceInterfaces, TRUE); + DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiGetDeviceInterfaceDetailA, TRUE); + DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiDestroyDeviceInfoList, TRUE); + DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiOpenDevRegKey, TRUE); + DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiGetDeviceRegistryPropertyA, TRUE); + DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiOpenDeviceInterfaceRegKey, TRUE); + + return LIBUSB_SUCCESS; +} + +static void exit_dlls(void) +{ + DLL_FREE_HANDLE(Cfgmgr32); + DLL_FREE_HANDLE(AdvAPI32); + DLL_FREE_HANDLE(Kernel32); + DLL_FREE_HANDLE(OLE32); + DLL_FREE_HANDLE(SetupAPI); +} + +/* + * enumerate interfaces for the whole USB class + * + * Parameters: + * dev_info: a pointer to a dev_info list + * dev_info_data: a pointer to an SP_DEVINFO_DATA to be filled (or NULL if not needed) + * usb_class: the generic USB class for which to retrieve interface details + * index: zero based index of the interface in the device info list + * + * Note: it is the responsibility of the caller to free the DEVICE_INTERFACE_DETAIL_DATA + * structure returned and call this function repeatedly using the same guid (with an + * incremented index starting at zero) until all interfaces have been returned. + */ +static bool get_devinfo_data(struct libusb_context *ctx, + HDEVINFO *dev_info, SP_DEVINFO_DATA *dev_info_data, const char *usb_class, unsigned _index) +{ + if (_index <= 0) { + *dev_info = pSetupDiGetClassDevsA(NULL, usb_class, NULL, DIGCF_PRESENT|DIGCF_ALLCLASSES); + if (*dev_info == INVALID_HANDLE_VALUE) + return false; + } + + dev_info_data->cbSize = sizeof(SP_DEVINFO_DATA); + if (!pSetupDiEnumDeviceInfo(*dev_info, _index, dev_info_data)) { + if (GetLastError() != ERROR_NO_MORE_ITEMS) + usbi_err(ctx, "Could not obtain device info data for index %u: %s", + _index, windows_error_str(0)); + + pSetupDiDestroyDeviceInfoList(*dev_info); + *dev_info = INVALID_HANDLE_VALUE; + return false; + } + return true; +} + +/* + * enumerate interfaces for a specific GUID + * + * Parameters: + * dev_info: a pointer to a dev_info list + * dev_info_data: a pointer to an SP_DEVINFO_DATA to be filled (or NULL if not needed) + * guid: the GUID for which to retrieve interface details + * index: zero based index of the interface in the device info list + * + * Note: it is the responsibility of the caller to free the DEVICE_INTERFACE_DETAIL_DATA + * structure returned and call this function repeatedly using the same guid (with an + * incremented index starting at zero) until all interfaces have been returned. + */ +static SP_DEVICE_INTERFACE_DETAIL_DATA_A *get_interface_details(struct libusb_context *ctx, + HDEVINFO *dev_info, SP_DEVINFO_DATA *dev_info_data, const GUID *guid, unsigned _index) +{ + SP_DEVICE_INTERFACE_DATA dev_interface_data; + SP_DEVICE_INTERFACE_DETAIL_DATA_A *dev_interface_details; + DWORD size; + + if (_index <= 0) + *dev_info = pSetupDiGetClassDevsA(guid, NULL, NULL, DIGCF_PRESENT|DIGCF_DEVICEINTERFACE); + + if (dev_info_data != NULL) { + dev_info_data->cbSize = sizeof(SP_DEVINFO_DATA); + if (!pSetupDiEnumDeviceInfo(*dev_info, _index, dev_info_data)) { + if (GetLastError() != ERROR_NO_MORE_ITEMS) + usbi_err(ctx, "Could not obtain device info data for index %u: %s", + _index, windows_error_str(0)); + + pSetupDiDestroyDeviceInfoList(*dev_info); + *dev_info = INVALID_HANDLE_VALUE; + return NULL; + } + } + + dev_interface_data.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA); + if (!pSetupDiEnumDeviceInterfaces(*dev_info, NULL, guid, _index, &dev_interface_data)) { + if (GetLastError() != ERROR_NO_MORE_ITEMS) + usbi_err(ctx, "Could not obtain interface data for index %u: %s", + _index, windows_error_str(0)); + + pSetupDiDestroyDeviceInfoList(*dev_info); + *dev_info = INVALID_HANDLE_VALUE; + return NULL; + } + + // Read interface data (dummy + actual) to access the device path + if (!pSetupDiGetDeviceInterfaceDetailA(*dev_info, &dev_interface_data, NULL, 0, &size, NULL)) { + // The dummy call should fail with ERROR_INSUFFICIENT_BUFFER + if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) { + usbi_err(ctx, "could not access interface data (dummy) for index %u: %s", + _index, windows_error_str(0)); + goto err_exit; + } + } else { + usbi_err(ctx, "program assertion failed - http://msdn.microsoft.com/en-us/library/ms792901.aspx is wrong."); + goto err_exit; + } + + dev_interface_details = calloc(1, size); + if (dev_interface_details == NULL) { + usbi_err(ctx, "could not allocate interface data for index %u.", _index); + goto err_exit; + } + + dev_interface_details->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_A); + if (!pSetupDiGetDeviceInterfaceDetailA(*dev_info, &dev_interface_data, + dev_interface_details, size, &size, NULL)) { + usbi_err(ctx, "could not access interface data (actual) for index %u: %s", + _index, windows_error_str(0)); + } + + return dev_interface_details; + +err_exit: + pSetupDiDestroyDeviceInfoList(*dev_info); + *dev_info = INVALID_HANDLE_VALUE; + return NULL; +} + +/* For libusb0 filter */ +static SP_DEVICE_INTERFACE_DETAIL_DATA_A *get_interface_details_filter(struct libusb_context *ctx, + HDEVINFO *dev_info, SP_DEVINFO_DATA *dev_info_data, const GUID *guid, unsigned _index, char *filter_path) +{ + SP_DEVICE_INTERFACE_DATA dev_interface_data; + SP_DEVICE_INTERFACE_DETAIL_DATA_A *dev_interface_details; + DWORD size; + + if (_index <= 0) + *dev_info = pSetupDiGetClassDevsA(guid, NULL, NULL, DIGCF_PRESENT|DIGCF_DEVICEINTERFACE); + + if (dev_info_data != NULL) { + dev_info_data->cbSize = sizeof(SP_DEVINFO_DATA); + if (!pSetupDiEnumDeviceInfo(*dev_info, _index, dev_info_data)) { + if (GetLastError() != ERROR_NO_MORE_ITEMS) + usbi_err(ctx, "Could not obtain device info data for index %u: %s", + _index, windows_error_str(0)); + + pSetupDiDestroyDeviceInfoList(*dev_info); + *dev_info = INVALID_HANDLE_VALUE; + return NULL; + } + } + + dev_interface_data.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA); + if (!pSetupDiEnumDeviceInterfaces(*dev_info, NULL, guid, _index, &dev_interface_data)) { + if (GetLastError() != ERROR_NO_MORE_ITEMS) + usbi_err(ctx, "Could not obtain interface data for index %u: %s", + _index, windows_error_str(0)); + + pSetupDiDestroyDeviceInfoList(*dev_info); + *dev_info = INVALID_HANDLE_VALUE; + return NULL; + } + + // Read interface data (dummy + actual) to access the device path + if (!pSetupDiGetDeviceInterfaceDetailA(*dev_info, &dev_interface_data, NULL, 0, &size, NULL)) { + // The dummy call should fail with ERROR_INSUFFICIENT_BUFFER + if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) { + usbi_err(ctx, "could not access interface data (dummy) for index %u: %s", + _index, windows_error_str(0)); + goto err_exit; + } + } else { + usbi_err(ctx, "program assertion failed - http://msdn.microsoft.com/en-us/library/ms792901.aspx is wrong."); + goto err_exit; + } + + dev_interface_details = calloc(1, size); + if (dev_interface_details == NULL) { + usbi_err(ctx, "could not allocate interface data for index %u.", _index); + goto err_exit; + } + + dev_interface_details->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_A); + if (!pSetupDiGetDeviceInterfaceDetailA(*dev_info, &dev_interface_data, dev_interface_details, size, &size, NULL)) + usbi_err(ctx, "could not access interface data (actual) for index %u: %s", + _index, windows_error_str(0)); + + // [trobinso] lookup the libusb0 symbolic index. + if (dev_interface_details) { + HKEY hkey_device_interface = pSetupDiOpenDeviceInterfaceRegKey(*dev_info, &dev_interface_data, 0, KEY_READ); + if (hkey_device_interface != INVALID_HANDLE_VALUE) { + DWORD libusb0_symboliclink_index = 0; + DWORD value_length = sizeof(DWORD); + DWORD value_type = 0; + LONG status; + + status = pRegQueryValueExW(hkey_device_interface, L"LUsb0", NULL, &value_type, + (LPBYTE)&libusb0_symboliclink_index, &value_length); + if (status == ERROR_SUCCESS) { + if (libusb0_symboliclink_index < 256) { + // libusb0.sys is connected to this device instance. + // If the the device interface guid is {F9F3FF14-AE21-48A0-8A25-8011A7A931D9} then it's a filter. + sprintf(filter_path, "\\\\.\\libusb0-%04u", (unsigned int)libusb0_symboliclink_index); + usbi_dbg("assigned libusb0 symbolic link %s", filter_path); + } else { + // libusb0.sys was connected to this device instance at one time; but not anymore. + } + } + pRegCloseKey(hkey_device_interface); + } + } + + return dev_interface_details; + +err_exit: + pSetupDiDestroyDeviceInfoList(*dev_info); + *dev_info = INVALID_HANDLE_VALUE; + return NULL; +} + +/* + * Returns the session ID of a device's nth level ancestor + * If there's no device at the nth level, return 0 + */ +static unsigned long get_ancestor_session_id(DWORD devinst, unsigned level) +{ + DWORD parent_devinst; + unsigned long session_id; + char *sanitized_path; + char path[MAX_PATH_LENGTH]; + unsigned i; + + if (level < 1) + return 0; + + for (i = 0; i < level; i++) { + if (CM_Get_Parent(&parent_devinst, devinst, 0) != CR_SUCCESS) + return 0; + devinst = parent_devinst; + } + + if (CM_Get_Device_IDA(devinst, path, MAX_PATH_LENGTH, 0) != CR_SUCCESS) + return 0; + + // TODO: (post hotplug): try without sanitizing + sanitized_path = sanitize_path(path); + if (sanitized_path == NULL) + return 0; + + session_id = htab_hash(sanitized_path); + free(sanitized_path); + return session_id; +} + +/* + * Determine which interface the given endpoint address belongs to + */ +static int get_interface_by_endpoint(struct libusb_config_descriptor *conf_desc, uint8_t ep) +{ + const struct libusb_interface *intf; + const struct libusb_interface_descriptor *intf_desc; + int i, j, k; + + for (i = 0; i < conf_desc->bNumInterfaces; i++) { + intf = &conf_desc->interface[i]; + for (j = 0; j < intf->num_altsetting; j++) { + intf_desc = &intf->altsetting[j]; + for (k = 0; k < intf_desc->bNumEndpoints; k++) { + if (intf_desc->endpoint[k].bEndpointAddress == ep) { + usbi_dbg("found endpoint %02X on interface %d", intf_desc->bInterfaceNumber, i); + return intf_desc->bInterfaceNumber; + } + } + } + } + + usbi_dbg("endpoint %02X not found on any interface", ep); + return LIBUSB_ERROR_NOT_FOUND; +} + +/* + * Populate the endpoints addresses of the device_priv interface helper structs + */ +static int windows_assign_endpoints(struct libusb_device_handle *dev_handle, int iface, int altsetting) +{ + int i, r; + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + struct libusb_config_descriptor *conf_desc; + const struct libusb_interface_descriptor *if_desc; + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + + r = libusb_get_active_config_descriptor(dev_handle->dev, &conf_desc); + if (r != LIBUSB_SUCCESS) { + usbi_warn(ctx, "could not read config descriptor: error %d", r); + return r; + } + + if_desc = &conf_desc->interface[iface].altsetting[altsetting]; + safe_free(priv->usb_interface[iface].endpoint); + + if (if_desc->bNumEndpoints == 0) { + usbi_dbg("no endpoints found for interface %d", iface); + libusb_free_config_descriptor(conf_desc); + return LIBUSB_SUCCESS; + } + + priv->usb_interface[iface].endpoint = malloc(if_desc->bNumEndpoints); + if (priv->usb_interface[iface].endpoint == NULL) { + libusb_free_config_descriptor(conf_desc); + return LIBUSB_ERROR_NO_MEM; + } + + priv->usb_interface[iface].nb_endpoints = if_desc->bNumEndpoints; + for (i = 0; i < if_desc->bNumEndpoints; i++) { + priv->usb_interface[iface].endpoint[i] = if_desc->endpoint[i].bEndpointAddress; + usbi_dbg("(re)assigned endpoint %02X to interface %d", priv->usb_interface[iface].endpoint[i], iface); + } + libusb_free_config_descriptor(conf_desc); + + // Extra init may be required to configure endpoints + return priv->apib->configure_endpoints(SUB_API_NOTSET, dev_handle, iface); +} + +// Lookup for a match in the list of API driver names +// return -1 if not found, driver match number otherwise +static int get_sub_api(char *driver, int api) +{ + int i; + const char sep_str[2] = {LIST_SEPARATOR, 0}; + char *tok, *tmp_str; + size_t len = strlen(driver); + + if (len == 0) + return SUB_API_NOTSET; + + tmp_str = _strdup(driver); + if (tmp_str == NULL) + return SUB_API_NOTSET; + + tok = strtok(tmp_str, sep_str); + while (tok != NULL) { + for (i = 0; i < usb_api_backend[api].nb_driver_names; i++) { + if (_stricmp(tok, usb_api_backend[api].driver_name_list[i]) == 0) { + free(tmp_str); + return i; + } + } + tok = strtok(NULL, sep_str); + } + + free(tmp_str); + return SUB_API_NOTSET; +} + +/* + * auto-claiming and auto-release helper functions + */ +static int auto_claim(struct libusb_transfer *transfer, int *interface_number, int api_type) +{ + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv( + transfer->dev_handle); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + int current_interface = *interface_number; + int r = LIBUSB_SUCCESS; + + switch(api_type) { + case USB_API_WINUSBX: + case USB_API_HID: + break; + default: + return LIBUSB_ERROR_INVALID_PARAM; + } + + usbi_mutex_lock(&autoclaim_lock); + if (current_interface < 0) { // No serviceable interface was found + for (current_interface = 0; current_interface < USB_MAXINTERFACES; current_interface++) { + // Must claim an interface of the same API type + if ((priv->usb_interface[current_interface].apib->id == api_type) + && (libusb_claim_interface(transfer->dev_handle, current_interface) == LIBUSB_SUCCESS)) { + usbi_dbg("auto-claimed interface %d for control request", current_interface); + if (handle_priv->autoclaim_count[current_interface] != 0) + usbi_warn(ctx, "program assertion failed - autoclaim_count was nonzero"); + handle_priv->autoclaim_count[current_interface]++; + break; + } + } + if (current_interface == USB_MAXINTERFACES) { + usbi_err(ctx, "could not auto-claim any interface"); + r = LIBUSB_ERROR_NOT_FOUND; + } + } else { + // If we have a valid interface that was autoclaimed, we must increment + // its autoclaim count so that we can prevent an early release. + if (handle_priv->autoclaim_count[current_interface] != 0) + handle_priv->autoclaim_count[current_interface]++; + } + usbi_mutex_unlock(&autoclaim_lock); + + *interface_number = current_interface; + return r; +} + +static void auto_release(struct usbi_transfer *itransfer) +{ + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + libusb_device_handle *dev_handle = transfer->dev_handle; + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + int r; + + usbi_mutex_lock(&autoclaim_lock); + if (handle_priv->autoclaim_count[transfer_priv->interface_number] > 0) { + handle_priv->autoclaim_count[transfer_priv->interface_number]--; + if (handle_priv->autoclaim_count[transfer_priv->interface_number] == 0) { + r = libusb_release_interface(dev_handle, transfer_priv->interface_number); + if (r == LIBUSB_SUCCESS) + usbi_dbg("auto-released interface %d", transfer_priv->interface_number); + else + usbi_dbg("failed to auto-release interface %d (%s)", + transfer_priv->interface_number, libusb_error_name((enum libusb_error)r)); + } + } + usbi_mutex_unlock(&autoclaim_lock); +} + +/* Windows version dtection */ +static BOOL is_x64(void) +{ + BOOL ret = FALSE; + + // Detect if we're running a 32 or 64 bit system + if (sizeof(uintptr_t) < 8) { + if (pIsWow64Process != NULL) + pIsWow64Process(GetCurrentProcess(), &ret); + } else { + ret = TRUE; + } + + return ret; +} + +static void get_windows_version(void) +{ + OSVERSIONINFOEXA vi, vi2; + const char *arch, *w = NULL; + unsigned major, minor; + ULONGLONG major_equal, minor_equal; + BOOL ws; + + memset(&vi, 0, sizeof(vi)); + vi.dwOSVersionInfoSize = sizeof(vi); + if (!GetVersionExA((OSVERSIONINFOA *)&vi)) { + memset(&vi, 0, sizeof(vi)); + vi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOA); + if (!GetVersionExA((OSVERSIONINFOA *)&vi)) + return; + } + + if (vi.dwPlatformId == VER_PLATFORM_WIN32_NT) { + if (vi.dwMajorVersion > 6 || (vi.dwMajorVersion == 6 && vi.dwMinorVersion >= 2)) { + // Starting with Windows 8.1 Preview, GetVersionEx() does no longer report the actual OS version + // See: http://msdn.microsoft.com/en-us/library/windows/desktop/dn302074.aspx + + major_equal = VerSetConditionMask(0, VER_MAJORVERSION, VER_EQUAL); + for (major = vi.dwMajorVersion; major <= 9; major++) { + memset(&vi2, 0, sizeof(vi2)); + vi2.dwOSVersionInfoSize = sizeof(vi2); + vi2.dwMajorVersion = major; + if (!VerifyVersionInfoA(&vi2, VER_MAJORVERSION, major_equal)) + continue; + + if (vi.dwMajorVersion < major) { + vi.dwMajorVersion = major; + vi.dwMinorVersion = 0; + } + + minor_equal = VerSetConditionMask(0, VER_MINORVERSION, VER_EQUAL); + for (minor = vi.dwMinorVersion; minor <= 9; minor++) { + memset(&vi2, 0, sizeof(vi2)); + vi2.dwOSVersionInfoSize = sizeof(vi2); + vi2.dwMinorVersion = minor; + if (!VerifyVersionInfoA(&vi2, VER_MINORVERSION, minor_equal)) + continue; + + vi.dwMinorVersion = minor; + break; + } + + break; + } + } + + if (vi.dwMajorVersion <= 0xf && vi.dwMinorVersion <= 0xf) { + ws = (vi.wProductType <= VER_NT_WORKSTATION); + windows_version = vi.dwMajorVersion << 4 | vi.dwMinorVersion; + switch (windows_version) { + case 0x50: w = "2000"; break; + case 0x51: w = "XP"; break; + case 0x52: w = "2003"; break; + case 0x60: w = (ws ? "Vista" : "2008"); break; + case 0x61: w = (ws ? "7" : "2008_R2"); break; + case 0x62: w = (ws ? "8" : "2012"); break; + case 0x63: w = (ws ? "8.1" : "2012_R2"); break; + case 0x64: w = (ws ? "10" : "2015"); break; + default: + if (windows_version < 0x50) + windows_version = WINDOWS_UNSUPPORTED; + else + w = "11 or later"; + break; + } + } + } + + arch = is_x64() ? "64-bit" : "32-bit"; + + if (w == NULL) + snprintf(windows_version_str, sizeof(windows_version_str), "%s %u.%u %s", + (vi.dwPlatformId == VER_PLATFORM_WIN32_NT ? "NT" : "??"), + (unsigned int)vi.dwMajorVersion, (unsigned int)vi.dwMinorVersion, arch); + else if (vi.wServicePackMinor) + snprintf(windows_version_str, sizeof(windows_version_str), "%s SP%u.%u %s", + w, vi.wServicePackMajor, vi.wServicePackMinor, arch); + else if (vi.wServicePackMajor) + snprintf(windows_version_str, sizeof(windows_version_str), "%s SP%u %s", + w, vi.wServicePackMajor, arch); + else + snprintf(windows_version_str, sizeof(windows_version_str), "%s %s", + w, arch); +} + +/* + * init: libusb backend init function + * + * This function enumerates the HCDs (Host Controller Drivers) and populates our private HCD list + * In our implementation, we equate Windows' "HCD" to libusb's "bus". Note that bus is zero indexed. + * HCDs are not expected to change after init (might not hold true for hot pluggable USB PCI card?) + */ +static int windows_init(struct libusb_context *ctx) +{ + int i, r = LIBUSB_ERROR_OTHER; + HANDLE semaphore; + char sem_name[11 + 8 + 1]; // strlen("libusb_init") + (32-bit hex PID) + '\0' + + sprintf(sem_name, "libusb_init%08X", (unsigned int)(GetCurrentProcessId() & 0xFFFFFFFF)); + semaphore = CreateSemaphoreA(NULL, 1, 1, sem_name); + if (semaphore == NULL) { + usbi_err(ctx, "could not create semaphore: %s", windows_error_str(0)); + return LIBUSB_ERROR_NO_MEM; + } + + // A successful wait brings our semaphore count to 0 (unsignaled) + // => any concurent wait stalls until the semaphore's release + if (WaitForSingleObject(semaphore, INFINITE) != WAIT_OBJECT_0) { + usbi_err(ctx, "failure to access semaphore: %s", windows_error_str(0)); + CloseHandle(semaphore); + return LIBUSB_ERROR_NO_MEM; + } + + // NB: concurrent usage supposes that init calls are equally balanced with + // exit calls. If init is called more than exit, we will not exit properly + if (++concurrent_usage == 0) { // First init? + get_windows_version(); + usbi_dbg("Windows %s", windows_version_str); + + if (windows_version == WINDOWS_UNSUPPORTED) { + usbi_err(ctx, "This version of Windows is NOT supported"); + r = LIBUSB_ERROR_NOT_SUPPORTED; + goto init_exit; + } + + // We need a lock for proper auto-release + usbi_mutex_init(&autoclaim_lock); + + // Initialize pollable file descriptors + init_polling(); + + // Load DLL imports + if (init_dlls() != LIBUSB_SUCCESS) { + usbi_err(ctx, "could not resolve DLL functions"); + goto init_exit; + } + + // Initialize the low level APIs (we don't care about errors at this stage) + for (i = 0; i < USB_API_MAX; i++) + usb_api_backend[i].init(SUB_API_NOTSET, ctx); + + r = windows_common_init(ctx); + if (r) + goto init_exit; + } + // At this stage, either we went through full init successfully, or didn't need to + r = LIBUSB_SUCCESS; + +init_exit: // Holds semaphore here. + if (!concurrent_usage && r != LIBUSB_SUCCESS) { // First init failed? + for (i = 0; i < USB_API_MAX; i++) + usb_api_backend[i].exit(SUB_API_NOTSET); + exit_dlls(); + exit_polling(); + windows_common_exit(); + usbi_mutex_destroy(&autoclaim_lock); + } + + if (r != LIBUSB_SUCCESS) + --concurrent_usage; // Not expected to call libusb_exit if we failed. + + ReleaseSemaphore(semaphore, 1, NULL); // increase count back to 1 + CloseHandle(semaphore); + return r; +} + +/* + * HCD (root) hubs need to have their device descriptor manually populated + * + * Note that, like Microsoft does in the device manager, we populate the + * Vendor and Device ID for HCD hubs with the ones from the PCI HCD device. + */ +static int force_hcd_device_descriptor(struct libusb_device *dev) +{ + struct windows_device_priv *parent_priv, *priv = _device_priv(dev); + struct libusb_context *ctx = DEVICE_CTX(dev); + int vid, pid; + + dev->num_configurations = 1; + priv->dev_descriptor.bLength = sizeof(USB_DEVICE_DESCRIPTOR); + priv->dev_descriptor.bDescriptorType = USB_DEVICE_DESCRIPTOR_TYPE; + priv->dev_descriptor.bNumConfigurations = 1; + priv->active_config = 1; + + if (dev->parent_dev == NULL) { + usbi_err(ctx, "program assertion failed - HCD hub has no parent"); + return LIBUSB_ERROR_NO_DEVICE; + } + + parent_priv = _device_priv(dev->parent_dev); + if (sscanf(parent_priv->path, "\\\\.\\PCI#VEN_%04x&DEV_%04x%*s", &vid, &pid) == 2) { + priv->dev_descriptor.idVendor = (uint16_t)vid; + priv->dev_descriptor.idProduct = (uint16_t)pid; + } else { + usbi_warn(ctx, "could not infer VID/PID of HCD hub from '%s'", parent_priv->path); + priv->dev_descriptor.idVendor = 0x1d6b; // Linux Foundation root hub + priv->dev_descriptor.idProduct = 1; + } + + return LIBUSB_SUCCESS; +} + +/* + * fetch and cache all the config descriptors through I/O + */ +static int cache_config_descriptors(struct libusb_device *dev, HANDLE hub_handle, char *device_id) +{ + DWORD size, ret_size; + struct libusb_context *ctx = DEVICE_CTX(dev); + struct windows_device_priv *priv = _device_priv(dev); + int r; + uint8_t i; + + USB_CONFIGURATION_DESCRIPTOR_SHORT cd_buf_short; // dummy request + PUSB_DESCRIPTOR_REQUEST cd_buf_actual = NULL; // actual request + PUSB_CONFIGURATION_DESCRIPTOR cd_data = NULL; + + if (dev->num_configurations == 0) + return LIBUSB_ERROR_INVALID_PARAM; + + priv->config_descriptor = calloc(dev->num_configurations, sizeof(unsigned char *)); + if (priv->config_descriptor == NULL) + return LIBUSB_ERROR_NO_MEM; + + for (i = 0; i < dev->num_configurations; i++) + priv->config_descriptor[i] = NULL; + + for (i = 0, r = LIBUSB_SUCCESS; ; i++) { + // safe loop: release all dynamic resources + safe_free(cd_buf_actual); + + // safe loop: end of loop condition + if ((i >= dev->num_configurations) || (r != LIBUSB_SUCCESS)) + break; + + size = sizeof(USB_CONFIGURATION_DESCRIPTOR_SHORT); + memset(&cd_buf_short, 0, size); + + cd_buf_short.req.ConnectionIndex = (ULONG)priv->port; + cd_buf_short.req.SetupPacket.bmRequest = LIBUSB_ENDPOINT_IN; + cd_buf_short.req.SetupPacket.bRequest = USB_REQUEST_GET_DESCRIPTOR; + cd_buf_short.req.SetupPacket.wValue = (USB_CONFIGURATION_DESCRIPTOR_TYPE << 8) | i; + cd_buf_short.req.SetupPacket.wIndex = 0; + cd_buf_short.req.SetupPacket.wLength = (USHORT)(size - sizeof(USB_DESCRIPTOR_REQUEST)); + + // Dummy call to get the required data size. Initial failures are reported as info rather + // than error as they can occur for non-penalizing situations, such as with some hubs. + // coverity[tainted_data_argument] + if (!DeviceIoControl(hub_handle, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, &cd_buf_short, size, + &cd_buf_short, size, &ret_size, NULL)) { + usbi_info(ctx, "could not access configuration descriptor (dummy) for '%s': %s", device_id, windows_error_str(0)); + LOOP_BREAK(LIBUSB_ERROR_IO); + } + + if ((ret_size != size) || (cd_buf_short.data.wTotalLength < sizeof(USB_CONFIGURATION_DESCRIPTOR))) { + usbi_info(ctx, "unexpected configuration descriptor size (dummy) for '%s'.", device_id); + LOOP_BREAK(LIBUSB_ERROR_IO); + } + + size = sizeof(USB_DESCRIPTOR_REQUEST) + cd_buf_short.data.wTotalLength; + cd_buf_actual = calloc(1, size); + if (cd_buf_actual == NULL) { + usbi_err(ctx, "could not allocate configuration descriptor buffer for '%s'.", device_id); + LOOP_BREAK(LIBUSB_ERROR_NO_MEM); + } + + // Actual call + cd_buf_actual->ConnectionIndex = (ULONG)priv->port; + cd_buf_actual->SetupPacket.bmRequest = LIBUSB_ENDPOINT_IN; + cd_buf_actual->SetupPacket.bRequest = USB_REQUEST_GET_DESCRIPTOR; + cd_buf_actual->SetupPacket.wValue = (USB_CONFIGURATION_DESCRIPTOR_TYPE << 8) | i; + cd_buf_actual->SetupPacket.wIndex = 0; + cd_buf_actual->SetupPacket.wLength = (USHORT)(size - sizeof(USB_DESCRIPTOR_REQUEST)); + + if (!DeviceIoControl(hub_handle, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, cd_buf_actual, size, + cd_buf_actual, size, &ret_size, NULL)) { + usbi_err(ctx, "could not access configuration descriptor (actual) for '%s': %s", device_id, windows_error_str(0)); + LOOP_BREAK(LIBUSB_ERROR_IO); + } + + cd_data = (PUSB_CONFIGURATION_DESCRIPTOR)((UCHAR *)cd_buf_actual + sizeof(USB_DESCRIPTOR_REQUEST)); + + if ((size != ret_size) || (cd_data->wTotalLength != cd_buf_short.data.wTotalLength)) { + usbi_err(ctx, "unexpected configuration descriptor size (actual) for '%s'.", device_id); + LOOP_BREAK(LIBUSB_ERROR_IO); + } + + if (cd_data->bDescriptorType != USB_CONFIGURATION_DESCRIPTOR_TYPE) { + usbi_err(ctx, "not a configuration descriptor for '%s'", device_id); + LOOP_BREAK(LIBUSB_ERROR_IO); + } + + usbi_dbg("cached config descriptor %d (bConfigurationValue=%u, %u bytes)", + i, cd_data->bConfigurationValue, cd_data->wTotalLength); + + // Cache the descriptor + priv->config_descriptor[i] = malloc(cd_data->wTotalLength); + if (priv->config_descriptor[i] == NULL) + LOOP_BREAK(LIBUSB_ERROR_NO_MEM); + memcpy(priv->config_descriptor[i], cd_data, cd_data->wTotalLength); + } + return LIBUSB_SUCCESS; +} + +/* + * Populate a libusb device structure + */ +static int init_device(struct libusb_device *dev, struct libusb_device *parent_dev, + uint8_t port_number, char *device_id, DWORD devinst) +{ + HANDLE handle; + DWORD size; + USB_NODE_CONNECTION_INFORMATION_EX conn_info; + USB_NODE_CONNECTION_INFORMATION_EX_V2 conn_info_v2; + struct windows_device_priv *priv, *parent_priv; + struct libusb_context *ctx; + struct libusb_device *tmp_dev; + unsigned long tmp_id; + unsigned i; + + if ((dev == NULL) || (parent_dev == NULL)) + return LIBUSB_ERROR_NOT_FOUND; + + ctx = DEVICE_CTX(dev); + priv = _device_priv(dev); + parent_priv = _device_priv(parent_dev); + if (parent_priv->apib->id != USB_API_HUB) { + usbi_warn(ctx, "parent for device '%s' is not a hub", device_id); + return LIBUSB_ERROR_NOT_FOUND; + } + + // It is possible for the parent hub not to have been initialized yet + // If that's the case, lookup the ancestors to set the bus number + if (parent_dev->bus_number == 0) { + for (i = 2; ; i++) { + tmp_id = get_ancestor_session_id(devinst, i); + if (tmp_id == 0) + break; + + tmp_dev = usbi_get_device_by_session_id(ctx, tmp_id); + if (tmp_dev == NULL) + continue; + + if (tmp_dev->bus_number != 0) { + usbi_dbg("got bus number from ancestor #%u", i); + parent_dev->bus_number = tmp_dev->bus_number; + libusb_unref_device(tmp_dev); + break; + } + + libusb_unref_device(tmp_dev); + } + } + + if (parent_dev->bus_number == 0) { + usbi_err(ctx, "program assertion failed: unable to find ancestor bus number for '%s'", device_id); + return LIBUSB_ERROR_NOT_FOUND; + } + + dev->bus_number = parent_dev->bus_number; + priv->port = port_number; + dev->port_number = port_number; + priv->depth = parent_priv->depth + 1; + dev->parent_dev = parent_dev; + + // If the device address is already set, we can stop here + if (dev->device_address != 0) + return LIBUSB_SUCCESS; + + memset(&conn_info, 0, sizeof(conn_info)); + if (priv->depth != 0) { // Not a HCD hub + handle = CreateFileA(parent_priv->path, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, OPEN_EXISTING, + FILE_FLAG_OVERLAPPED, NULL); + if (handle == INVALID_HANDLE_VALUE) { + usbi_warn(ctx, "could not open hub %s: %s", parent_priv->path, windows_error_str(0)); + return LIBUSB_ERROR_ACCESS; + } + + size = sizeof(conn_info); + conn_info.ConnectionIndex = (ULONG)port_number; + // coverity[tainted_data_argument] + if (!DeviceIoControl(handle, IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX, &conn_info, size, + &conn_info, size, &size, NULL)) { + usbi_warn(ctx, "could not get node connection information for device '%s': %s", + device_id, windows_error_str(0)); + CloseHandle(handle); + return LIBUSB_ERROR_NO_DEVICE; + } + + if (conn_info.ConnectionStatus == NoDeviceConnected) { + usbi_err(ctx, "device '%s' is no longer connected!", device_id); + CloseHandle(handle); + return LIBUSB_ERROR_NO_DEVICE; + } + + memcpy(&priv->dev_descriptor, &(conn_info.DeviceDescriptor), sizeof(USB_DEVICE_DESCRIPTOR)); + dev->num_configurations = priv->dev_descriptor.bNumConfigurations; + priv->active_config = conn_info.CurrentConfigurationValue; + usbi_dbg("found %u configurations (active conf: %u)", dev->num_configurations, priv->active_config); + + // If we can't read the config descriptors, just set the number of confs to zero + if (cache_config_descriptors(dev, handle, device_id) != LIBUSB_SUCCESS) { + dev->num_configurations = 0; + priv->dev_descriptor.bNumConfigurations = 0; + } + + // In their great wisdom, Microsoft decided to BREAK the USB speed report between Windows 7 and Windows 8 + if (windows_version >= WINDOWS_8) { + memset(&conn_info_v2, 0, sizeof(conn_info_v2)); + size = sizeof(conn_info_v2); + conn_info_v2.ConnectionIndex = (ULONG)port_number; + conn_info_v2.Length = size; + conn_info_v2.SupportedUsbProtocols.Usb300 = 1; + if (!DeviceIoControl(handle, IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX_V2, + &conn_info_v2, size, &conn_info_v2, size, &size, NULL)) { + usbi_warn(ctx, "could not get node connection information (V2) for device '%s': %s", + device_id, windows_error_str(0)); + } else if (conn_info_v2.Flags.DeviceIsOperatingAtSuperSpeedOrHigher) { + conn_info.Speed = 3; + } + } + + CloseHandle(handle); + + if (conn_info.DeviceAddress > UINT8_MAX) + usbi_err(ctx, "program assertion failed: device address overflow"); + + dev->device_address = (uint8_t)conn_info.DeviceAddress + 1; + if (dev->device_address == 1) + usbi_err(ctx, "program assertion failed: device address collision with root hub"); + + switch (conn_info.Speed) { + case 0: dev->speed = LIBUSB_SPEED_LOW; break; + case 1: dev->speed = LIBUSB_SPEED_FULL; break; + case 2: dev->speed = LIBUSB_SPEED_HIGH; break; + case 3: dev->speed = LIBUSB_SPEED_SUPER; break; + default: + usbi_warn(ctx, "Got unknown device speed %u", conn_info.Speed); + break; + } + } else { + dev->device_address = 1; // root hubs are set to use device number 1 + force_hcd_device_descriptor(dev); + } + + usbi_sanitize_device(dev); + + usbi_dbg("(bus: %u, addr: %u, depth: %u, port: %u): '%s'", + dev->bus_number, dev->device_address, priv->depth, priv->port, device_id); + + return LIBUSB_SUCCESS; +} + +// Returns the api type, or 0 if not found/unsupported +static void get_api_type(struct libusb_context *ctx, HDEVINFO *dev_info, + SP_DEVINFO_DATA *dev_info_data, int *api, int *sub_api) +{ + // Precedence for filter drivers vs driver is in the order of this array + struct driver_lookup lookup[3] = { + {"\0\0", SPDRP_SERVICE, "driver"}, + {"\0\0", SPDRP_UPPERFILTERS, "upper filter driver"}, + {"\0\0", SPDRP_LOWERFILTERS, "lower filter driver"} + }; + DWORD size, reg_type; + unsigned k, l; + int i, j; + + *api = USB_API_UNSUPPORTED; + *sub_api = SUB_API_NOTSET; + + // Check the service & filter names to know the API we should use + for (k = 0; k < 3; k++) { + if (pSetupDiGetDeviceRegistryPropertyA(*dev_info, dev_info_data, lookup[k].reg_prop, + ®_type, (BYTE *)lookup[k].list, MAX_KEY_LENGTH, &size)) { + // Turn the REG_SZ SPDRP_SERVICE into REG_MULTI_SZ + if (lookup[k].reg_prop == SPDRP_SERVICE) + // our buffers are MAX_KEY_LENGTH + 1 so we can overflow if needed + lookup[k].list[strlen(lookup[k].list) + 1] = 0; + + // MULTI_SZ is a pain to work with. Turn it into something much more manageable + // NB: none of the driver names we check against contain LIST_SEPARATOR, + // (currently ';'), so even if an unsuported one does, it's not an issue + for (l = 0; (lookup[k].list[l] != 0) || (lookup[k].list[l + 1] != 0); l++) { + if (lookup[k].list[l] == 0) + lookup[k].list[l] = LIST_SEPARATOR; + } + usbi_dbg("%s(s): %s", lookup[k].designation, lookup[k].list); + } else { + if (GetLastError() != ERROR_INVALID_DATA) + usbi_dbg("could not access %s: %s", lookup[k].designation, windows_error_str(0)); + lookup[k].list[0] = 0; + } + } + + for (i = 1; i < USB_API_MAX; i++) { + for (k = 0; k < 3; k++) { + j = get_sub_api(lookup[k].list, i); + if (j >= 0) { + usbi_dbg("matched %s name against %s", lookup[k].designation, + (i != USB_API_WINUSBX) ? usb_api_backend[i].designation : sub_api_name[j]); + *api = i; + *sub_api = j; + return; + } + } + } +} + +static int set_composite_interface(struct libusb_context *ctx, struct libusb_device *dev, + char *dev_interface_path, char *device_id, int api, int sub_api) +{ + unsigned i; + struct windows_device_priv *priv = _device_priv(dev); + int interface_number; + + if (priv->apib->id != USB_API_COMPOSITE) { + usbi_err(ctx, "program assertion failed: '%s' is not composite", device_id); + return LIBUSB_ERROR_NO_DEVICE; + } + + // Because MI_## are not necessarily in sequential order (some composite + // devices will have only MI_00 & MI_03 for instance), we retrieve the actual + // interface number from the path's MI value + interface_number = 0; + for (i = 0; device_id[i] != 0; ) { + if ((device_id[i++] == 'M') && (device_id[i++] == 'I') + && (device_id[i++] == '_')) { + interface_number = (device_id[i++] - '0') * 10; + interface_number += device_id[i] - '0'; + break; + } + } + + if (device_id[i] == 0) + usbi_warn(ctx, "failure to read interface number for %s. Using default value %d", + device_id, interface_number); + + if (priv->usb_interface[interface_number].path != NULL) { + if (api == USB_API_HID) { + // HID devices can have multiple collections (COL##) for each MI_## interface + usbi_dbg("interface[%d] already set - ignoring HID collection: %s", + interface_number, device_id); + return LIBUSB_ERROR_ACCESS; + } + // In other cases, just use the latest data + safe_free(priv->usb_interface[interface_number].path); + } + + usbi_dbg("interface[%d] = %s", interface_number, dev_interface_path); + priv->usb_interface[interface_number].path = dev_interface_path; + priv->usb_interface[interface_number].apib = &usb_api_backend[api]; + priv->usb_interface[interface_number].sub_api = sub_api; + if ((api == USB_API_HID) && (priv->hid == NULL)) { + priv->hid = calloc(1, sizeof(struct hid_device_priv)); + if (priv->hid == NULL) + return LIBUSB_ERROR_NO_MEM; + } + + return LIBUSB_SUCCESS; +} + +static int set_hid_interface(struct libusb_context *ctx, struct libusb_device *dev, + char *dev_interface_path) +{ + int i; + struct windows_device_priv *priv = _device_priv(dev); + + if (priv->hid == NULL) { + usbi_err(ctx, "program assertion failed: parent is not HID"); + return LIBUSB_ERROR_NO_DEVICE; + } else if (priv->hid->nb_interfaces == USB_MAXINTERFACES) { + usbi_err(ctx, "program assertion failed: max USB interfaces reached for HID device"); + return LIBUSB_ERROR_NO_DEVICE; + } + + for (i = 0; i < priv->hid->nb_interfaces; i++) { + if ((priv->usb_interface[i].path != NULL) && strcmp(priv->usb_interface[i].path, dev_interface_path) == 0) { + usbi_dbg("interface[%d] already set to %s", i, dev_interface_path); + return LIBUSB_ERROR_ACCESS; + } + } + + priv->usb_interface[priv->hid->nb_interfaces].path = dev_interface_path; + priv->usb_interface[priv->hid->nb_interfaces].apib = &usb_api_backend[USB_API_HID]; + usbi_dbg("interface[%u] = %s", priv->hid->nb_interfaces, dev_interface_path); + priv->hid->nb_interfaces++; + return LIBUSB_SUCCESS; +} + +/* + * get_device_list: libusb backend device enumeration function + */ +static int windows_get_device_list(struct libusb_context *ctx, struct discovered_devs **_discdevs) +{ + struct discovered_devs *discdevs; + HDEVINFO dev_info = { 0 }; + const char *usb_class[] = {"USB", "NUSB3", "IUSB3", "IARUSB3"}; + SP_DEVINFO_DATA dev_info_data = { 0 }; + SP_DEVICE_INTERFACE_DETAIL_DATA_A *dev_interface_details = NULL; + GUID hid_guid; +#define MAX_ENUM_GUIDS 64 + const GUID *guid[MAX_ENUM_GUIDS]; +#define HCD_PASS 0 +#define HUB_PASS 1 +#define GEN_PASS 2 +#define DEV_PASS 3 +#define HID_PASS 4 + int r = LIBUSB_SUCCESS; + int api, sub_api; + size_t class_index = 0; + unsigned int nb_guids, pass, i, j, ancestor; + char path[MAX_PATH_LENGTH]; + char strbuf[MAX_PATH_LENGTH]; + struct libusb_device *dev, *parent_dev; + struct windows_device_priv *priv, *parent_priv; + char *dev_interface_path = NULL; + char *dev_id_path = NULL; + unsigned long session_id; + DWORD size, reg_type, port_nr, install_state; + HKEY key; + WCHAR guid_string_w[MAX_GUID_STRING_LENGTH]; + GUID *if_guid; + LONG s; + // Keep a list of newly allocated devs to unref + libusb_device **unref_list, **new_unref_list; + unsigned int unref_size = 64; + unsigned int unref_cur = 0; + + // PASS 1 : (re)enumerate HCDs (allows for HCD hotplug) + // PASS 2 : (re)enumerate HUBS + // PASS 3 : (re)enumerate generic USB devices (including driverless) + // and list additional USB device interface GUIDs to explore + // PASS 4 : (re)enumerate master USB devices that have a device interface + // PASS 5+: (re)enumerate device interfaced GUIDs (including HID) and + // set the device interfaces. + + // Init the GUID table + guid[HCD_PASS] = &GUID_DEVINTERFACE_USB_HOST_CONTROLLER; + guid[HUB_PASS] = &GUID_DEVINTERFACE_USB_HUB; + guid[GEN_PASS] = NULL; + guid[DEV_PASS] = &GUID_DEVINTERFACE_USB_DEVICE; + HidD_GetHidGuid(&hid_guid); + guid[HID_PASS] = &hid_guid; + nb_guids = HID_PASS + 1; + + unref_list = calloc(unref_size, sizeof(libusb_device *)); + if (unref_list == NULL) + return LIBUSB_ERROR_NO_MEM; + + for (pass = 0; ((pass < nb_guids) && (r == LIBUSB_SUCCESS)); pass++) { +//#define ENUM_DEBUG +#if defined(ENABLE_LOGGING) && defined(ENUM_DEBUG) + const char *passname[] = { "HCD", "HUB", "GEN", "DEV", "HID", "EXT" }; + usbi_dbg("#### PROCESSING %ss %s", passname[(pass <= HID_PASS) ? pass : (HID_PASS + 1)], + (pass != GEN_PASS) ? guid_to_string(guid[pass]) : ""); +#endif + for (i = 0; ; i++) { + // safe loop: free up any (unprotected) dynamic resource + // NB: this is always executed before breaking the loop + safe_free(dev_interface_details); + safe_free(dev_interface_path); + safe_free(dev_id_path); + priv = parent_priv = NULL; + dev = parent_dev = NULL; + + // Safe loop: end of loop conditions + if (r != LIBUSB_SUCCESS) + break; + + if ((pass == HCD_PASS) && (i == UINT8_MAX)) { + usbi_warn(ctx, "program assertion failed - found more than %d buses, skipping the rest.", UINT8_MAX); + break; + } + + if (pass != GEN_PASS) { + // Except for GEN, all passes deal with device interfaces + dev_interface_details = get_interface_details(ctx, &dev_info, &dev_info_data, guid[pass], i); + if (dev_interface_details == NULL) + break; + + dev_interface_path = sanitize_path(dev_interface_details->DevicePath); + if (dev_interface_path == NULL) { + usbi_warn(ctx, "could not sanitize device interface path for '%s'", dev_interface_details->DevicePath); + continue; + } + } else { + // Workaround for a Nec/Renesas USB 3.0 driver bug where root hubs are + // being listed under the "NUSB3" PnP Symbolic Name rather than "USB". + // The Intel USB 3.0 driver behaves similar, but uses "IUSB3" + // The Intel Alpine Ridge USB 3.1 driver uses "IARUSB3" + for (; class_index < ARRAYSIZE(usb_class); class_index++) { + if (get_devinfo_data(ctx, &dev_info, &dev_info_data, usb_class[class_index], i)) + break; + i = 0; + } + if (class_index >= ARRAYSIZE(usb_class)) + break; + } + + // Read the Device ID path. This is what we'll use as UID + // Note that if the device is plugged in a different port or hub, the Device ID changes + if (CM_Get_Device_IDA(dev_info_data.DevInst, path, sizeof(path), 0) != CR_SUCCESS) { + usbi_warn(ctx, "could not read the device id path for devinst %X, skipping", + (unsigned int)dev_info_data.DevInst); + continue; + } + + dev_id_path = sanitize_path(path); + if (dev_id_path == NULL) { + usbi_warn(ctx, "could not sanitize device id path for devinst %X, skipping", + (unsigned int)dev_info_data.DevInst); + continue; + } +#ifdef ENUM_DEBUG + usbi_dbg("PRO: %s", dev_id_path); +#endif + + // The SPDRP_ADDRESS for USB devices is the device port number on the hub + port_nr = 0; + if ((pass >= HUB_PASS) && (pass <= GEN_PASS)) { + if ((!pSetupDiGetDeviceRegistryPropertyA(dev_info, &dev_info_data, SPDRP_ADDRESS, + ®_type, (BYTE *)&port_nr, 4, &size)) || (size != 4)) { + usbi_warn(ctx, "could not retrieve port number for device '%s', skipping: %s", + dev_id_path, windows_error_str(0)); + continue; + } + } + + // Set API to use or get additional data from generic pass + api = USB_API_UNSUPPORTED; + sub_api = SUB_API_NOTSET; + switch (pass) { + case HCD_PASS: + break; + case GEN_PASS: + // We use the GEN pass to detect driverless devices... + size = sizeof(strbuf); + if (!pSetupDiGetDeviceRegistryPropertyA(dev_info, &dev_info_data, SPDRP_DRIVER, + ®_type, (BYTE *)strbuf, size, &size)) { + usbi_info(ctx, "The following device has no driver: '%s'", dev_id_path); + usbi_info(ctx, "libusb will not be able to access it."); + } + // ...and to add the additional device interface GUIDs + key = pSetupDiOpenDevRegKey(dev_info, &dev_info_data, DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_READ); + if (key != INVALID_HANDLE_VALUE) { + size = sizeof(guid_string_w); + s = pRegQueryValueExW(key, L"DeviceInterfaceGUIDs", NULL, ®_type, + (BYTE *)guid_string_w, &size); + pRegCloseKey(key); + if (s == ERROR_SUCCESS) { + if (nb_guids >= MAX_ENUM_GUIDS) { + // If this assert is ever reported, grow a GUID table dynamically + usbi_err(ctx, "program assertion failed: too many GUIDs"); + LOOP_BREAK(LIBUSB_ERROR_OVERFLOW); + } + if_guid = calloc(1, sizeof(GUID)); + if (if_guid == NULL) { + usbi_err(ctx, "could not calloc for if_guid: not enough memory"); + LOOP_BREAK(LIBUSB_ERROR_NO_MEM); + } + pCLSIDFromString(guid_string_w, if_guid); + guid[nb_guids++] = if_guid; + usbi_dbg("extra GUID: %s", guid_to_string(if_guid)); + } + } + break; + case HID_PASS: + api = USB_API_HID; + break; + default: + // Get the API type (after checking that the driver installation is OK) + if ((!pSetupDiGetDeviceRegistryPropertyA(dev_info, &dev_info_data, SPDRP_INSTALL_STATE, + ®_type, (BYTE *)&install_state, 4, &size)) || (size != 4)) { + usbi_warn(ctx, "could not detect installation state of driver for '%s': %s", + dev_id_path, windows_error_str(0)); + } else if (install_state != 0) { + usbi_warn(ctx, "driver for device '%s' is reporting an issue (code: %u) - skipping", + dev_id_path, (unsigned int)install_state); + continue; + } + get_api_type(ctx, &dev_info, &dev_info_data, &api, &sub_api); + break; + } + + // Find parent device (for the passes that need it) + switch (pass) { + case HCD_PASS: + case DEV_PASS: + case HUB_PASS: + break; + default: + // Go through the ancestors until we see a face we recognize + parent_dev = NULL; + for (ancestor = 1; parent_dev == NULL; ancestor++) { + session_id = get_ancestor_session_id(dev_info_data.DevInst, ancestor); + if (session_id == 0) + break; + + parent_dev = usbi_get_device_by_session_id(ctx, session_id); + } + + if (parent_dev == NULL) { + usbi_dbg("unlisted ancestor for '%s' (non USB HID, newly connected, etc.) - ignoring", dev_id_path); + continue; + } + + parent_priv = _device_priv(parent_dev); + // virtual USB devices are also listed during GEN - don't process these yet + if ((pass == GEN_PASS) && (parent_priv->apib->id != USB_API_HUB)) { + libusb_unref_device(parent_dev); + continue; + } + + break; + } + + // Create new or match existing device, using the (hashed) device_id as session id + if (pass <= DEV_PASS) { // For subsequent passes, we'll lookup the parent + // These are the passes that create "new" devices + session_id = htab_hash(dev_id_path); + dev = usbi_get_device_by_session_id(ctx, session_id); + if (dev == NULL) { + if (pass == DEV_PASS) { + // This can occur if the OS only reports a newly plugged device after we started enum + usbi_warn(ctx, "'%s' was only detected in late pass (newly connected device?)" + " - ignoring", dev_id_path); + continue; + } + + usbi_dbg("allocating new device for session [%lX]", session_id); + dev = usbi_alloc_device(ctx, session_id); + if (dev == NULL) + LOOP_BREAK(LIBUSB_ERROR_NO_MEM); + + priv = windows_device_priv_init(dev); + } else { + usbi_dbg("found existing device for session [%lX] (%u.%u)", + session_id, dev->bus_number, dev->device_address); + + priv = _device_priv(dev); + if ((parent_dev != NULL) && (dev->parent_dev != NULL)) { + if (dev->parent_dev != parent_dev) { + // It is possible for the actual parent device to not have existed at the + // time of enumeration, so the currently assigned parent may in fact be a + // grandparent. If the devices differ, we assume the "new" parent device + // is in fact closer to the device. + usbi_dbg("updating parent device [session %lX -> %lX]", + dev->parent_dev->session_data, parent_dev->session_data); + libusb_unref_device(dev->parent_dev); + dev->parent_dev = parent_dev; + } else { + // We hold a reference to parent_dev instance, but this device already + // has a parent_dev reference (only one per child) + libusb_unref_device(parent_dev); + } + } + } + + // Keep track of devices that need unref + unref_list[unref_cur++] = dev; + if (unref_cur >= unref_size) { + unref_size += 64; + new_unref_list = usbi_reallocf(unref_list, unref_size * sizeof(libusb_device *)); + if (new_unref_list == NULL) { + usbi_err(ctx, "could not realloc list for unref - aborting."); + LOOP_BREAK(LIBUSB_ERROR_NO_MEM); + } else { + unref_list = new_unref_list; + } + } + } + + // Setup device + switch (pass) { + case HCD_PASS: + // If the hcd has already been setup, don't do it again + if (priv->path != NULL) + break; + dev->bus_number = (uint8_t)(i + 1); // bus 0 is reserved for disconnected + dev->device_address = 0; + dev->num_configurations = 0; + priv->apib = &usb_api_backend[USB_API_HUB]; + priv->sub_api = SUB_API_NOTSET; + priv->depth = UINT8_MAX; // Overflow to 0 for HCD Hubs + priv->path = dev_interface_path; + dev_interface_path = NULL; + break; + case HUB_PASS: + case DEV_PASS: + // If the device has already been setup, don't do it again + if (priv->path != NULL) + break; + // Take care of API initialization + priv->path = dev_interface_path; + dev_interface_path = NULL; + priv->apib = &usb_api_backend[api]; + priv->sub_api = sub_api; + switch(api) { + case USB_API_COMPOSITE: + case USB_API_HUB: + break; + case USB_API_HID: + priv->hid = calloc(1, sizeof(struct hid_device_priv)); + if (priv->hid == NULL) + LOOP_BREAK(LIBUSB_ERROR_NO_MEM); + + priv->hid->nb_interfaces = 0; + break; + default: + // For other devices, the first interface is the same as the device + priv->usb_interface[0].path = _strdup(priv->path); + if (priv->usb_interface[0].path == NULL) + usbi_warn(ctx, "could not duplicate interface path '%s'", priv->path); + // The following is needed if we want API calls to work for both simple + // and composite devices. + for (j = 0; j < USB_MAXINTERFACES; j++) + priv->usb_interface[j].apib = &usb_api_backend[api]; + + break; + } + break; + case GEN_PASS: + r = init_device(dev, parent_dev, (uint8_t)port_nr, dev_id_path, dev_info_data.DevInst); + if (r == LIBUSB_SUCCESS) { + // Append device to the list of discovered devices + discdevs = discovered_devs_append(*_discdevs, dev); + if (!discdevs) + LOOP_BREAK(LIBUSB_ERROR_NO_MEM); + + *_discdevs = discdevs; + } else if (r == LIBUSB_ERROR_NO_DEVICE) { + // This can occur if the device was disconnected but Windows hasn't + // refreshed its enumeration yet - in that case, we ignore the device + r = LIBUSB_SUCCESS; + } + break; + default: // HID_PASS and later + if (parent_priv->apib->id == USB_API_HID || parent_priv->apib->id == USB_API_COMPOSITE) { + if (parent_priv->apib->id == USB_API_HID) { + usbi_dbg("setting HID interface for [%lX]:", parent_dev->session_data); + r = set_hid_interface(ctx, parent_dev, dev_interface_path); + } else { + usbi_dbg("setting composite interface for [%lX]:", parent_dev->session_data); + r = set_composite_interface(ctx, parent_dev, dev_interface_path, dev_id_path, api, sub_api); + } + switch (r) { + case LIBUSB_SUCCESS: + dev_interface_path = NULL; + break; + case LIBUSB_ERROR_ACCESS: + // interface has already been set => make sure dev_interface_path is freed then + r = LIBUSB_SUCCESS; + break; + default: + LOOP_BREAK(r); + break; + } + } + libusb_unref_device(parent_dev); + break; + } + } + } + + // Free any additional GUIDs + for (pass = HID_PASS + 1; pass < nb_guids; pass++) + free((void *)guid[pass]); + + // Unref newly allocated devs + for (i = 0; i < unref_cur; i++) + libusb_unref_device(unref_list[i]); + free(unref_list); + + return r; +} + +/* + * exit: libusb backend deinitialization function + */ +static void windows_exit(void) +{ + int i; + HANDLE semaphore; + char sem_name[11 + 8 + 1]; // strlen("libusb_init") + (32-bit hex PID) + '\0' + + sprintf(sem_name, "libusb_init%08X", (unsigned int)(GetCurrentProcessId() & 0xFFFFFFFF)); + semaphore = CreateSemaphoreA(NULL, 1, 1, sem_name); + if (semaphore == NULL) + return; + + // A successful wait brings our semaphore count to 0 (unsignaled) + // => any concurent wait stalls until the semaphore release + if (WaitForSingleObject(semaphore, INFINITE) != WAIT_OBJECT_0) { + CloseHandle(semaphore); + return; + } + + // Only works if exits and inits are balanced exactly + if (--concurrent_usage < 0) { // Last exit + for (i = 0; i < USB_API_MAX; i++) + usb_api_backend[i].exit(SUB_API_NOTSET); + exit_dlls(); + exit_polling(); + windows_common_exit(); + usbi_mutex_destroy(&autoclaim_lock); + } + + ReleaseSemaphore(semaphore, 1, NULL); // increase count back to 1 + CloseHandle(semaphore); +} + +static int windows_get_device_descriptor(struct libusb_device *dev, unsigned char *buffer, int *host_endian) +{ + struct windows_device_priv *priv = _device_priv(dev); + + memcpy(buffer, &priv->dev_descriptor, DEVICE_DESC_LENGTH); + *host_endian = 0; + + return LIBUSB_SUCCESS; +} + +static int windows_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, unsigned char *buffer, size_t len, int *host_endian) +{ + struct windows_device_priv *priv = _device_priv(dev); + PUSB_CONFIGURATION_DESCRIPTOR config_header; + size_t size; + + // config index is zero based + if (config_index >= dev->num_configurations) + return LIBUSB_ERROR_INVALID_PARAM; + + if ((priv->config_descriptor == NULL) || (priv->config_descriptor[config_index] == NULL)) + return LIBUSB_ERROR_NOT_FOUND; + + config_header = (PUSB_CONFIGURATION_DESCRIPTOR)priv->config_descriptor[config_index]; + + size = MIN(config_header->wTotalLength, len); + memcpy(buffer, priv->config_descriptor[config_index], size); + *host_endian = 0; + + return (int)size; +} + +static int windows_get_config_descriptor_by_value(struct libusb_device *dev, uint8_t bConfigurationValue, + unsigned char **buffer, int *host_endian) +{ + struct windows_device_priv *priv = _device_priv(dev); + PUSB_CONFIGURATION_DESCRIPTOR config_header; + uint8_t index; + + *buffer = NULL; + *host_endian = 0; + + if (priv->config_descriptor == NULL) + return LIBUSB_ERROR_NOT_FOUND; + + for (index = 0; index < dev->num_configurations; index++) { + config_header = (PUSB_CONFIGURATION_DESCRIPTOR)priv->config_descriptor[index]; + if (config_header->bConfigurationValue == bConfigurationValue) { + *buffer = priv->config_descriptor[index]; + return (int)config_header->wTotalLength; + } + } + + return LIBUSB_ERROR_NOT_FOUND; +} + +/* + * return the cached copy of the active config descriptor + */ +static int windows_get_active_config_descriptor(struct libusb_device *dev, unsigned char *buffer, size_t len, int *host_endian) +{ + struct windows_device_priv *priv = _device_priv(dev); + unsigned char *config_desc; + int r; + + if (priv->active_config == 0) + return LIBUSB_ERROR_NOT_FOUND; + + r = windows_get_config_descriptor_by_value(dev, priv->active_config, &config_desc, host_endian); + if (r < 0) + return r; + + len = MIN((size_t)r, len); + memcpy(buffer, config_desc, len); + return (int)len; +} + +static int windows_open(struct libusb_device_handle *dev_handle) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + + if (priv->apib == NULL) { + usbi_err(ctx, "program assertion failed - device is not initialized"); + return LIBUSB_ERROR_NO_DEVICE; + } + + return priv->apib->open(SUB_API_NOTSET, dev_handle); +} + +static void windows_close(struct libusb_device_handle *dev_handle) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + + priv->apib->close(SUB_API_NOTSET, dev_handle); +} + +static int windows_get_configuration(struct libusb_device_handle *dev_handle, int *config) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + + if (priv->active_config == 0) { + *config = 0; + return LIBUSB_ERROR_NOT_FOUND; + } + + *config = priv->active_config; + return LIBUSB_SUCCESS; +} + +/* + * from http://msdn.microsoft.com/en-us/library/ms793522.aspx: "The port driver + * does not currently expose a service that allows higher-level drivers to set + * the configuration." + */ +static int windows_set_configuration(struct libusb_device_handle *dev_handle, int config) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + int r = LIBUSB_SUCCESS; + + if (config >= USB_MAXCONFIG) + return LIBUSB_ERROR_INVALID_PARAM; + + r = libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_OUT | + LIBUSB_REQUEST_TYPE_STANDARD | LIBUSB_RECIPIENT_DEVICE, + LIBUSB_REQUEST_SET_CONFIGURATION, (uint16_t)config, + 0, NULL, 0, 1000); + + if (r == LIBUSB_SUCCESS) + priv->active_config = (uint8_t)config; + + return r; +} + +static int windows_claim_interface(struct libusb_device_handle *dev_handle, int iface) +{ + int r = LIBUSB_SUCCESS; + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + + safe_free(priv->usb_interface[iface].endpoint); + priv->usb_interface[iface].nb_endpoints = 0; + + r = priv->apib->claim_interface(SUB_API_NOTSET, dev_handle, iface); + + if (r == LIBUSB_SUCCESS) + r = windows_assign_endpoints(dev_handle, iface, 0); + + return r; +} + +static int windows_set_interface_altsetting(struct libusb_device_handle *dev_handle, int iface, int altsetting) +{ + int r = LIBUSB_SUCCESS; + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + + safe_free(priv->usb_interface[iface].endpoint); + priv->usb_interface[iface].nb_endpoints = 0; + + r = priv->apib->set_interface_altsetting(SUB_API_NOTSET, dev_handle, iface, altsetting); + + if (r == LIBUSB_SUCCESS) + r = windows_assign_endpoints(dev_handle, iface, altsetting); + + return r; +} + +static int windows_release_interface(struct libusb_device_handle *dev_handle, int iface) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + + return priv->apib->release_interface(SUB_API_NOTSET, dev_handle, iface); +} + +static int windows_clear_halt(struct libusb_device_handle *dev_handle, unsigned char endpoint) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + return priv->apib->clear_halt(SUB_API_NOTSET, dev_handle, endpoint); +} + +static int windows_reset_device(struct libusb_device_handle *dev_handle) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + return priv->apib->reset_device(SUB_API_NOTSET, dev_handle); +} + +// The 3 functions below are unlikely to ever get supported on Windows +static int windows_kernel_driver_active(struct libusb_device_handle *dev_handle, int iface) +{ + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +static int windows_attach_kernel_driver(struct libusb_device_handle *dev_handle, int iface) +{ + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +static int windows_detach_kernel_driver(struct libusb_device_handle *dev_handle, int iface) +{ + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +static void windows_destroy_device(struct libusb_device *dev) +{ + windows_device_priv_release(dev); +} + +void windows_clear_transfer_priv(struct usbi_transfer *itransfer) +{ + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + + usbi_free_fd(&transfer_priv->pollable_fd); + safe_free(transfer_priv->hid_buffer); + // When auto claim is in use, attempt to release the auto-claimed interface + auto_release(itransfer); +} + +static int submit_bulk_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + int r; + + r = priv->apib->submit_bulk_transfer(SUB_API_NOTSET, itransfer); + if (r != LIBUSB_SUCCESS) + return r; + + usbi_add_pollfd(ctx, transfer_priv->pollable_fd.fd, + (short)(IS_XFERIN(transfer) ? POLLIN : POLLOUT)); + + return LIBUSB_SUCCESS; +} + +static int submit_iso_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + int r; + + r = priv->apib->submit_iso_transfer(SUB_API_NOTSET, itransfer); + if (r != LIBUSB_SUCCESS) + return r; + + usbi_add_pollfd(ctx, transfer_priv->pollable_fd.fd, + (short)(IS_XFERIN(transfer) ? POLLIN : POLLOUT)); + + return LIBUSB_SUCCESS; +} + +static int submit_control_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + int r; + + r = priv->apib->submit_control_transfer(SUB_API_NOTSET, itransfer); + if (r != LIBUSB_SUCCESS) + return r; + + usbi_add_pollfd(ctx, transfer_priv->pollable_fd.fd, POLLIN); + + return LIBUSB_SUCCESS; +} + +static int windows_submit_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + return submit_control_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + if (IS_XFEROUT(transfer) && (transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET)) + return LIBUSB_ERROR_NOT_SUPPORTED; + return submit_bulk_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + return submit_iso_transfer(itransfer); + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + return LIBUSB_ERROR_NOT_SUPPORTED; + default: + usbi_err(TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type); + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +static int windows_abort_control(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + + return priv->apib->abort_control(SUB_API_NOTSET, itransfer); +} + +static int windows_abort_transfers(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + + return priv->apib->abort_transfers(SUB_API_NOTSET, itransfer); +} + +static int windows_cancel_transfer(struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + + switch (transfer->type) { + case LIBUSB_TRANSFER_TYPE_CONTROL: + return windows_abort_control(itransfer); + case LIBUSB_TRANSFER_TYPE_BULK: + case LIBUSB_TRANSFER_TYPE_INTERRUPT: + case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: + return windows_abort_transfers(itransfer); + case LIBUSB_TRANSFER_TYPE_BULK_STREAM: + return LIBUSB_ERROR_NOT_SUPPORTED; + default: + usbi_err(ITRANSFER_CTX(itransfer), "unknown endpoint type %d", transfer->type); + return LIBUSB_ERROR_INVALID_PARAM; + } +} + +int windows_copy_transfer_data(struct usbi_transfer *itransfer, uint32_t io_size) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + return priv->apib->copy_transfer_data(SUB_API_NOTSET, itransfer, io_size); +} + +struct winfd *windows_get_fd(struct usbi_transfer *transfer) +{ + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(transfer); + return &transfer_priv->pollable_fd; +} + +void windows_get_overlapped_result(struct usbi_transfer *transfer, struct winfd *pollable_fd, DWORD *io_result, DWORD *io_size) +{ + if (HasOverlappedIoCompletedSync(pollable_fd->overlapped)) { + *io_result = NO_ERROR; + *io_size = (DWORD)pollable_fd->overlapped->InternalHigh; + } else if (GetOverlappedResult(pollable_fd->handle, pollable_fd->overlapped, io_size, false)) { + // Regular async overlapped + *io_result = NO_ERROR; + } else { + *io_result = GetLastError(); + } +} + +// NB: MSVC6 does not support named initializers. +const struct usbi_os_backend windows_backend = { + "Windows", + USBI_CAP_HAS_HID_ACCESS, + windows_init, + windows_exit, + + windows_get_device_list, + NULL, /* hotplug_poll */ + windows_open, + windows_close, + + windows_get_device_descriptor, + windows_get_active_config_descriptor, + windows_get_config_descriptor, + windows_get_config_descriptor_by_value, + + windows_get_configuration, + windows_set_configuration, + windows_claim_interface, + windows_release_interface, + + windows_set_interface_altsetting, + windows_clear_halt, + windows_reset_device, + + NULL, /* alloc_streams */ + NULL, /* free_streams */ + + NULL, /* dev_mem_alloc */ + NULL, /* dev_mem_free */ + + windows_kernel_driver_active, + windows_detach_kernel_driver, + windows_attach_kernel_driver, + + windows_destroy_device, + + windows_submit_transfer, + windows_cancel_transfer, + windows_clear_transfer_priv, + + windows_handle_events, + NULL, + + windows_clock_gettime, +#if defined(USBI_TIMERFD_AVAILABLE) + NULL, +#endif + sizeof(struct windows_device_priv), + sizeof(struct windows_device_handle_priv), + sizeof(struct windows_transfer_priv), +}; + + +/* + * USB API backends + */ +static int unsupported_init(int sub_api, struct libusb_context *ctx) +{ + return LIBUSB_SUCCESS; +} + +static int unsupported_exit(int sub_api) +{ + return LIBUSB_SUCCESS; +} + +static int unsupported_open(int sub_api, struct libusb_device_handle *dev_handle) +{ + PRINT_UNSUPPORTED_API(open); +} + +static void unsupported_close(int sub_api, struct libusb_device_handle *dev_handle) +{ + usbi_dbg("unsupported API call for 'close'"); +} + +static int unsupported_configure_endpoints(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + PRINT_UNSUPPORTED_API(configure_endpoints); +} + +static int unsupported_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + PRINT_UNSUPPORTED_API(claim_interface); +} + +static int unsupported_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting) +{ + PRINT_UNSUPPORTED_API(set_interface_altsetting); +} + +static int unsupported_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + PRINT_UNSUPPORTED_API(release_interface); +} + +static int unsupported_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint) +{ + PRINT_UNSUPPORTED_API(clear_halt); +} + +static int unsupported_reset_device(int sub_api, struct libusb_device_handle *dev_handle) +{ + PRINT_UNSUPPORTED_API(reset_device); +} + +static int unsupported_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer) +{ + PRINT_UNSUPPORTED_API(submit_bulk_transfer); +} + +static int unsupported_submit_iso_transfer(int sub_api, struct usbi_transfer *itransfer) +{ + PRINT_UNSUPPORTED_API(submit_iso_transfer); +} + +static int unsupported_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer) +{ + PRINT_UNSUPPORTED_API(submit_control_transfer); +} + +static int unsupported_abort_control(int sub_api, struct usbi_transfer *itransfer) +{ + PRINT_UNSUPPORTED_API(abort_control); +} + +static int unsupported_abort_transfers(int sub_api, struct usbi_transfer *itransfer) +{ + PRINT_UNSUPPORTED_API(abort_transfers); +} + +static int unsupported_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size) +{ + PRINT_UNSUPPORTED_API(copy_transfer_data); +} + +static int common_configure_endpoints(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + return LIBUSB_SUCCESS; +} + +// These names must be uppercase +static const char *hub_driver_names[] = {"USBHUB", "USBHUB3", "USB3HUB", "NUSB3HUB", "RUSB3HUB", "FLXHCIH", "TIHUB3", "ETRONHUB3", "VIAHUB3", "ASMTHUB3", "IUSB3HUB", "VUSB3HUB", "AMDHUB30", "VHHUB", "AUSB3HUB"}; +static const char *composite_driver_names[] = {"USBCCGP"}; +static const char *winusbx_driver_names[] = WINUSBX_DRV_NAMES; +static const char *hid_driver_names[] = {"HIDUSB", "MOUHID", "KBDHID"}; +const struct windows_usb_api_backend usb_api_backend[USB_API_MAX] = { + { + USB_API_UNSUPPORTED, + "Unsupported API", + NULL, + 0, + unsupported_init, + unsupported_exit, + unsupported_open, + unsupported_close, + unsupported_configure_endpoints, + unsupported_claim_interface, + unsupported_set_interface_altsetting, + unsupported_release_interface, + unsupported_clear_halt, + unsupported_reset_device, + unsupported_submit_bulk_transfer, + unsupported_submit_iso_transfer, + unsupported_submit_control_transfer, + unsupported_abort_control, + unsupported_abort_transfers, + unsupported_copy_transfer_data, + }, + { + USB_API_HUB, + "HUB API", + hub_driver_names, + ARRAYSIZE(hub_driver_names), + unsupported_init, + unsupported_exit, + unsupported_open, + unsupported_close, + unsupported_configure_endpoints, + unsupported_claim_interface, + unsupported_set_interface_altsetting, + unsupported_release_interface, + unsupported_clear_halt, + unsupported_reset_device, + unsupported_submit_bulk_transfer, + unsupported_submit_iso_transfer, + unsupported_submit_control_transfer, + unsupported_abort_control, + unsupported_abort_transfers, + unsupported_copy_transfer_data, + }, + { + USB_API_COMPOSITE, + "Composite API", + composite_driver_names, + ARRAYSIZE(composite_driver_names), + composite_init, + composite_exit, + composite_open, + composite_close, + common_configure_endpoints, + composite_claim_interface, + composite_set_interface_altsetting, + composite_release_interface, + composite_clear_halt, + composite_reset_device, + composite_submit_bulk_transfer, + composite_submit_iso_transfer, + composite_submit_control_transfer, + composite_abort_control, + composite_abort_transfers, + composite_copy_transfer_data, + }, + { + USB_API_WINUSBX, + "WinUSB-like APIs", + winusbx_driver_names, + ARRAYSIZE(winusbx_driver_names), + winusbx_init, + winusbx_exit, + winusbx_open, + winusbx_close, + winusbx_configure_endpoints, + winusbx_claim_interface, + winusbx_set_interface_altsetting, + winusbx_release_interface, + winusbx_clear_halt, + winusbx_reset_device, + winusbx_submit_bulk_transfer, + unsupported_submit_iso_transfer, + winusbx_submit_control_transfer, + winusbx_abort_control, + winusbx_abort_transfers, + winusbx_copy_transfer_data, + }, + { + USB_API_HID, + "HID API", + hid_driver_names, + ARRAYSIZE(hid_driver_names), + hid_init, + hid_exit, + hid_open, + hid_close, + common_configure_endpoints, + hid_claim_interface, + hid_set_interface_altsetting, + hid_release_interface, + hid_clear_halt, + hid_reset_device, + hid_submit_bulk_transfer, + unsupported_submit_iso_transfer, + hid_submit_control_transfer, + hid_abort_transfers, + hid_abort_transfers, + hid_copy_transfer_data, + }, +}; + + +/* + * WinUSB-like (WinUSB, libusb0/libusbK through libusbk DLL) API functions + */ +#define WinUSBX_Set(fn) \ + do { \ + if (native_winusb) \ + WinUSBX[i].fn = (WinUsb_##fn##_t)GetProcAddress(h, "WinUsb_" #fn); \ + else \ + pLibK_GetProcAddress((PVOID *)&WinUSBX[i].fn, i, KUSB_FNID_##fn); \ + } while (0) + +static int winusbx_init(int sub_api, struct libusb_context *ctx) +{ + HMODULE h; + bool native_winusb; + int i; + KLIB_VERSION LibK_Version; + LibK_GetProcAddress_t pLibK_GetProcAddress = NULL; + LibK_GetVersion_t pLibK_GetVersion; + + h = LoadLibraryA("libusbK"); + + if (h == NULL) { + usbi_info(ctx, "libusbK DLL is not available, will use native WinUSB"); + h = LoadLibraryA("WinUSB"); + + if (h == NULL) { + usbi_warn(ctx, "WinUSB DLL is not available either, " + "you will not be able to access devices outside of enumeration"); + return LIBUSB_ERROR_NOT_FOUND; + } + } else { + usbi_dbg("using libusbK DLL for universal access"); + pLibK_GetVersion = (LibK_GetVersion_t)GetProcAddress(h, "LibK_GetVersion"); + if (pLibK_GetVersion != NULL) { + pLibK_GetVersion(&LibK_Version); + usbi_dbg("libusbK version: %d.%d.%d.%d", LibK_Version.Major, LibK_Version.Minor, + LibK_Version.Micro, LibK_Version.Nano); + } + pLibK_GetProcAddress = (LibK_GetProcAddress_t)GetProcAddress(h, "LibK_GetProcAddress"); + if (pLibK_GetProcAddress == NULL) { + usbi_err(ctx, "LibK_GetProcAddress() not found in libusbK DLL"); + FreeLibrary(h); + return LIBUSB_ERROR_NOT_FOUND; + } + } + + native_winusb = (pLibK_GetProcAddress == NULL); + for (i = SUB_API_LIBUSBK; i < SUB_API_MAX; i++) { + WinUSBX_Set(AbortPipe); + WinUSBX_Set(ControlTransfer); + WinUSBX_Set(FlushPipe); + WinUSBX_Set(Free); + WinUSBX_Set(GetAssociatedInterface); + WinUSBX_Set(GetCurrentAlternateSetting); + WinUSBX_Set(GetDescriptor); + WinUSBX_Set(GetOverlappedResult); + WinUSBX_Set(GetPipePolicy); + WinUSBX_Set(GetPowerPolicy); + WinUSBX_Set(Initialize); + WinUSBX_Set(QueryDeviceInformation); + WinUSBX_Set(QueryInterfaceSettings); + WinUSBX_Set(QueryPipe); + WinUSBX_Set(ReadPipe); + WinUSBX_Set(ResetPipe); + WinUSBX_Set(SetCurrentAlternateSetting); + WinUSBX_Set(SetPipePolicy); + WinUSBX_Set(SetPowerPolicy); + WinUSBX_Set(WritePipe); + if (!native_winusb) + WinUSBX_Set(ResetDevice); + + if (WinUSBX[i].Initialize != NULL) { + WinUSBX[i].initialized = true; + usbi_dbg("initalized sub API %s", sub_api_name[i]); + } else { + usbi_warn(ctx, "Failed to initalize sub API %s", sub_api_name[i]); + WinUSBX[i].initialized = false; + } + } + + WinUSBX_handle = h; + return LIBUSB_SUCCESS; +} + +static int winusbx_exit(int sub_api) +{ + if (WinUSBX_handle != NULL) { + FreeLibrary(WinUSBX_handle); + WinUSBX_handle = NULL; + + /* Reset the WinUSBX API structures */ + memset(&WinUSBX, 0, sizeof(WinUSBX)); + } + + return LIBUSB_SUCCESS; +} + +// NB: open and close must ensure that they only handle interface of +// the right API type, as these functions can be called wholesale from +// composite_open(), with interfaces belonging to different APIs +static int winusbx_open(int sub_api, struct libusb_device_handle *dev_handle) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + + HANDLE file_handle; + int i; + + CHECK_WINUSBX_AVAILABLE(sub_api); + + // WinUSB requires a separate handle for each interface + for (i = 0; i < USB_MAXINTERFACES; i++) { + if ((priv->usb_interface[i].path != NULL) + && (priv->usb_interface[i].apib->id == USB_API_WINUSBX)) { + file_handle = CreateFileA(priv->usb_interface[i].path, GENERIC_WRITE | GENERIC_READ, FILE_SHARE_WRITE | FILE_SHARE_READ, + NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL); + if (file_handle == INVALID_HANDLE_VALUE) { + usbi_err(ctx, "could not open device %s (interface %d): %s", priv->usb_interface[i].path, i, windows_error_str(0)); + switch(GetLastError()) { + case ERROR_FILE_NOT_FOUND: // The device was disconnected + return LIBUSB_ERROR_NO_DEVICE; + case ERROR_ACCESS_DENIED: + return LIBUSB_ERROR_ACCESS; + default: + return LIBUSB_ERROR_IO; + } + } + handle_priv->interface_handle[i].dev_handle = file_handle; + } + } + + return LIBUSB_SUCCESS; +} + +static void winusbx_close(int sub_api, struct libusb_device_handle *dev_handle) +{ + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + HANDLE handle; + int i; + + if (sub_api == SUB_API_NOTSET) + sub_api = priv->sub_api; + + if (!WinUSBX[sub_api].initialized) + return; + + if (priv->apib->id == USB_API_COMPOSITE) { + // If this is a composite device, just free and close all WinUSB-like + // interfaces directly (each is independent and not associated with another) + for (i = 0; i < USB_MAXINTERFACES; i++) { + if (priv->usb_interface[i].apib->id == USB_API_WINUSBX) { + handle = handle_priv->interface_handle[i].api_handle; + if (HANDLE_VALID(handle)) + WinUSBX[sub_api].Free(handle); + + handle = handle_priv->interface_handle[i].dev_handle; + if (HANDLE_VALID(handle)) + CloseHandle(handle); + } + } + } else { + // If this is a WinUSB device, free all interfaces above interface 0, + // then free and close interface 0 last + for (i = 1; i < USB_MAXINTERFACES; i++) { + handle = handle_priv->interface_handle[i].api_handle; + if (HANDLE_VALID(handle)) + WinUSBX[sub_api].Free(handle); + } + handle = handle_priv->interface_handle[0].api_handle; + if (HANDLE_VALID(handle)) + WinUSBX[sub_api].Free(handle); + + handle = handle_priv->interface_handle[0].dev_handle; + if (HANDLE_VALID(handle)) + CloseHandle(handle); + } +} + +static int winusbx_configure_endpoints(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + HANDLE winusb_handle = handle_priv->interface_handle[iface].api_handle; + UCHAR policy; + ULONG timeout = 0; + uint8_t endpoint_address; + int i; + + CHECK_WINUSBX_AVAILABLE(sub_api); + + // With handle and enpoints set (in parent), we can setup the default pipe properties + // see http://download.microsoft.com/download/D/1/D/D1DD7745-426B-4CC3-A269-ABBBE427C0EF/DVC-T705_DDC08.pptx + for (i = -1; i < priv->usb_interface[iface].nb_endpoints; i++) { + endpoint_address = (i == -1) ? 0 : priv->usb_interface[iface].endpoint[i]; + if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address, + PIPE_TRANSFER_TIMEOUT, sizeof(ULONG), &timeout)) + usbi_dbg("failed to set PIPE_TRANSFER_TIMEOUT for control endpoint %02X", endpoint_address); + + if ((i == -1) || (sub_api == SUB_API_LIBUSB0)) + continue; // Other policies don't apply to control endpoint or libusb0 + + policy = false; + if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address, + SHORT_PACKET_TERMINATE, sizeof(UCHAR), &policy)) + usbi_dbg("failed to disable SHORT_PACKET_TERMINATE for endpoint %02X", endpoint_address); + + if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address, + IGNORE_SHORT_PACKETS, sizeof(UCHAR), &policy)) + usbi_dbg("failed to disable IGNORE_SHORT_PACKETS for endpoint %02X", endpoint_address); + + policy = true; + /* ALLOW_PARTIAL_READS must be enabled due to likely libusbK bug. See: + https://sourceforge.net/mailarchive/message.php?msg_id=29736015 */ + if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address, + ALLOW_PARTIAL_READS, sizeof(UCHAR), &policy)) + usbi_dbg("failed to enable ALLOW_PARTIAL_READS for endpoint %02X", endpoint_address); + + if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address, + AUTO_CLEAR_STALL, sizeof(UCHAR), &policy)) + usbi_dbg("failed to enable AUTO_CLEAR_STALL for endpoint %02X", endpoint_address); + } + + return LIBUSB_SUCCESS; +} + +static int winusbx_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + bool is_using_usbccgp = (priv->apib->id == USB_API_COMPOSITE); + SP_DEVICE_INTERFACE_DETAIL_DATA_A *dev_interface_details = NULL; + HDEVINFO dev_info = INVALID_HANDLE_VALUE; + SP_DEVINFO_DATA dev_info_data; + char *dev_path_no_guid = NULL; + char filter_path[] = "\\\\.\\libusb0-0000"; + bool found_filter = false; + HANDLE file_handle, winusb_handle; + DWORD err; + int i; + + CHECK_WINUSBX_AVAILABLE(sub_api); + + // If the device is composite, but using the default Windows composite parent driver (usbccgp) + // or if it's the first WinUSB-like interface, we get a handle through Initialize(). + if ((is_using_usbccgp) || (iface == 0)) { + // composite device (independent interfaces) or interface 0 + file_handle = handle_priv->interface_handle[iface].dev_handle; + if (!HANDLE_VALID(file_handle)) + return LIBUSB_ERROR_NOT_FOUND; + + if (!WinUSBX[sub_api].Initialize(file_handle, &winusb_handle)) { + handle_priv->interface_handle[iface].api_handle = INVALID_HANDLE_VALUE; + err = GetLastError(); + switch(err) { + case ERROR_BAD_COMMAND: + // The device was disconnected + usbi_err(ctx, "could not access interface %d: %s", iface, windows_error_str(0)); + return LIBUSB_ERROR_NO_DEVICE; + default: + // it may be that we're using the libusb0 filter driver. + // TODO: can we move this whole business into the K/0 DLL? + for (i = 0; ; i++) { + safe_free(dev_interface_details); + safe_free(dev_path_no_guid); + + dev_interface_details = get_interface_details_filter(ctx, &dev_info, &dev_info_data, &GUID_DEVINTERFACE_LIBUSB0_FILTER, i, filter_path); + if ((found_filter) || (dev_interface_details == NULL)) + break; + + // ignore GUID part + dev_path_no_guid = sanitize_path(strtok(dev_interface_details->DevicePath, "{")); + if (dev_path_no_guid == NULL) + continue; + + if (strncmp(dev_path_no_guid, priv->usb_interface[iface].path, strlen(dev_path_no_guid)) == 0) { + file_handle = CreateFileA(filter_path, GENERIC_WRITE | GENERIC_READ, FILE_SHARE_WRITE | FILE_SHARE_READ, + NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL); + if (file_handle != INVALID_HANDLE_VALUE) { + if (WinUSBX[sub_api].Initialize(file_handle, &winusb_handle)) { + // Replace the existing file handle with the working one + CloseHandle(handle_priv->interface_handle[iface].dev_handle); + handle_priv->interface_handle[iface].dev_handle = file_handle; + found_filter = true; + } else { + usbi_err(ctx, "could not initialize filter driver for %s", filter_path); + CloseHandle(file_handle); + } + } else { + usbi_err(ctx, "could not open device %s: %s", filter_path, windows_error_str(0)); + } + } + } + free(dev_interface_details); + if (!found_filter) { + usbi_err(ctx, "could not access interface %d: %s", iface, windows_error_str(err)); + return LIBUSB_ERROR_ACCESS; + } + } + } + handle_priv->interface_handle[iface].api_handle = winusb_handle; + } else { + // For all other interfaces, use GetAssociatedInterface() + winusb_handle = handle_priv->interface_handle[0].api_handle; + // It is a requirement for multiple interface devices on Windows that, to you + // must first claim the first interface before you claim the others + if (!HANDLE_VALID(winusb_handle)) { + file_handle = handle_priv->interface_handle[0].dev_handle; + if (WinUSBX[sub_api].Initialize(file_handle, &winusb_handle)) { + handle_priv->interface_handle[0].api_handle = winusb_handle; + usbi_warn(ctx, "auto-claimed interface 0 (required to claim %d with WinUSB)", iface); + } else { + usbi_warn(ctx, "failed to auto-claim interface 0 (required to claim %d with WinUSB): %s", iface, windows_error_str(0)); + return LIBUSB_ERROR_ACCESS; + } + } + if (!WinUSBX[sub_api].GetAssociatedInterface(winusb_handle, (UCHAR)(iface - 1), + &handle_priv->interface_handle[iface].api_handle)) { + handle_priv->interface_handle[iface].api_handle = INVALID_HANDLE_VALUE; + switch(GetLastError()) { + case ERROR_NO_MORE_ITEMS: // invalid iface + return LIBUSB_ERROR_NOT_FOUND; + case ERROR_BAD_COMMAND: // The device was disconnected + return LIBUSB_ERROR_NO_DEVICE; + case ERROR_ALREADY_EXISTS: // already claimed + return LIBUSB_ERROR_BUSY; + default: + usbi_err(ctx, "could not claim interface %d: %s", iface, windows_error_str(0)); + return LIBUSB_ERROR_ACCESS; + } + } + } + usbi_dbg("claimed interface %d", iface); + handle_priv->active_interface = iface; + + return LIBUSB_SUCCESS; +} + +static int winusbx_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + HANDLE winusb_handle; + + CHECK_WINUSBX_AVAILABLE(sub_api); + + winusb_handle = handle_priv->interface_handle[iface].api_handle; + if (!HANDLE_VALID(winusb_handle)) + return LIBUSB_ERROR_NOT_FOUND; + + WinUSBX[sub_api].Free(winusb_handle); + handle_priv->interface_handle[iface].api_handle = INVALID_HANDLE_VALUE; + + return LIBUSB_SUCCESS; +} + +/* + * Return the first valid interface (of the same API type), for control transfers + */ +static int get_valid_interface(struct libusb_device_handle *dev_handle, int api_id) +{ + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + int i; + + if ((api_id < USB_API_WINUSBX) || (api_id > USB_API_HID)) { + usbi_dbg("unsupported API ID"); + return -1; + } + + for (i = 0; i < USB_MAXINTERFACES; i++) { + if (HANDLE_VALID(handle_priv->interface_handle[i].dev_handle) + && HANDLE_VALID(handle_priv->interface_handle[i].api_handle) + && (priv->usb_interface[i].apib->id == api_id)) + return i; + } + + return -1; +} + +/* + * Lookup interface by endpoint address. -1 if not found + */ +static int interface_by_endpoint(struct windows_device_priv *priv, + struct windows_device_handle_priv *handle_priv, uint8_t endpoint_address) +{ + int i, j; + + for (i = 0; i < USB_MAXINTERFACES; i++) { + if (!HANDLE_VALID(handle_priv->interface_handle[i].api_handle)) + continue; + if (priv->usb_interface[i].endpoint == NULL) + continue; + for (j = 0; j < priv->usb_interface[i].nb_endpoints; j++) { + if (priv->usb_interface[i].endpoint[j] == endpoint_address) + return i; + } + } + + return -1; +} + +static int winusbx_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle); + WINUSB_SETUP_PACKET *setup = (WINUSB_SETUP_PACKET *)transfer->buffer; + ULONG size; + HANDLE winusb_handle; + int current_interface; + struct winfd wfd; + + CHECK_WINUSBX_AVAILABLE(sub_api); + + transfer_priv->pollable_fd = INVALID_WINFD; + size = transfer->length - LIBUSB_CONTROL_SETUP_SIZE; + + // Windows places upper limits on the control transfer size + // See: https://msdn.microsoft.com/en-us/library/windows/hardware/ff538112.aspx + if (size > MAX_CTRL_BUFFER_LENGTH) + return LIBUSB_ERROR_INVALID_PARAM; + + current_interface = get_valid_interface(transfer->dev_handle, USB_API_WINUSBX); + if (current_interface < 0) { + if (auto_claim(transfer, ¤t_interface, USB_API_WINUSBX) != LIBUSB_SUCCESS) + return LIBUSB_ERROR_NOT_FOUND; + } + + usbi_dbg("will use interface %d", current_interface); + winusb_handle = handle_priv->interface_handle[current_interface].api_handle; + + wfd = usbi_create_fd(winusb_handle, RW_READ, NULL, NULL); + // Always use the handle returned from usbi_create_fd (wfd.handle) + if (wfd.fd < 0) + return LIBUSB_ERROR_NO_MEM; + + // Sending of set configuration control requests from WinUSB creates issues + if (((setup->request_type & (0x03 << 5)) == LIBUSB_REQUEST_TYPE_STANDARD) + && (setup->request == LIBUSB_REQUEST_SET_CONFIGURATION)) { + if (setup->value != priv->active_config) { + usbi_warn(ctx, "cannot set configuration other than the default one"); + usbi_free_fd(&wfd); + return LIBUSB_ERROR_INVALID_PARAM; + } + wfd.overlapped->Internal = STATUS_COMPLETED_SYNCHRONOUSLY; + wfd.overlapped->InternalHigh = 0; + } else { + if (!WinUSBX[sub_api].ControlTransfer(wfd.handle, *setup, transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE, size, NULL, wfd.overlapped)) { + if (GetLastError() != ERROR_IO_PENDING) { + usbi_warn(ctx, "ControlTransfer failed: %s", windows_error_str(0)); + usbi_free_fd(&wfd); + return LIBUSB_ERROR_IO; + } + } else { + wfd.overlapped->Internal = STATUS_COMPLETED_SYNCHRONOUSLY; + wfd.overlapped->InternalHigh = (DWORD)size; + } + } + + // Use priv_transfer to store data needed for async polling + transfer_priv->pollable_fd = wfd; + transfer_priv->interface_number = (uint8_t)current_interface; + + return LIBUSB_SUCCESS; +} + +static int winusbx_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + HANDLE winusb_handle; + + CHECK_WINUSBX_AVAILABLE(sub_api); + + if (altsetting > 255) + return LIBUSB_ERROR_INVALID_PARAM; + + winusb_handle = handle_priv->interface_handle[iface].api_handle; + if (!HANDLE_VALID(winusb_handle)) { + usbi_err(ctx, "interface must be claimed first"); + return LIBUSB_ERROR_NOT_FOUND; + } + + if (!WinUSBX[sub_api].SetCurrentAlternateSetting(winusb_handle, (UCHAR)altsetting)) { + usbi_err(ctx, "SetCurrentAlternateSetting failed: %s", windows_error_str(0)); + return LIBUSB_ERROR_IO; + } + + return LIBUSB_SUCCESS; +} + +static int winusbx_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + HANDLE winusb_handle; + bool ret; + int current_interface; + struct winfd wfd; + + CHECK_WINUSBX_AVAILABLE(sub_api); + + transfer_priv->pollable_fd = INVALID_WINFD; + + current_interface = interface_by_endpoint(priv, handle_priv, transfer->endpoint); + if (current_interface < 0) { + usbi_err(ctx, "unable to match endpoint to an open interface - cancelling transfer"); + return LIBUSB_ERROR_NOT_FOUND; + } + + usbi_dbg("matched endpoint %02X with interface %d", transfer->endpoint, current_interface); + + winusb_handle = handle_priv->interface_handle[current_interface].api_handle; + + wfd = usbi_create_fd(winusb_handle, IS_XFERIN(transfer) ? RW_READ : RW_WRITE, NULL, NULL); + // Always use the handle returned from usbi_create_fd (wfd.handle) + if (wfd.fd < 0) + return LIBUSB_ERROR_NO_MEM; + + if (IS_XFERIN(transfer)) { + usbi_dbg("reading %d bytes", transfer->length); + ret = WinUSBX[sub_api].ReadPipe(wfd.handle, transfer->endpoint, transfer->buffer, transfer->length, NULL, wfd.overlapped); + } else { + usbi_dbg("writing %d bytes", transfer->length); + ret = WinUSBX[sub_api].WritePipe(wfd.handle, transfer->endpoint, transfer->buffer, transfer->length, NULL, wfd.overlapped); + } + + if (!ret) { + if (GetLastError() != ERROR_IO_PENDING) { + usbi_err(ctx, "ReadPipe/WritePipe failed: %s", windows_error_str(0)); + usbi_free_fd(&wfd); + return LIBUSB_ERROR_IO; + } + } else { + wfd.overlapped->Internal = STATUS_COMPLETED_SYNCHRONOUSLY; + wfd.overlapped->InternalHigh = (DWORD)transfer->length; + } + + transfer_priv->pollable_fd = wfd; + transfer_priv->interface_number = (uint8_t)current_interface; + + return LIBUSB_SUCCESS; +} + +static int winusbx_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + HANDLE winusb_handle; + int current_interface; + + CHECK_WINUSBX_AVAILABLE(sub_api); + + current_interface = interface_by_endpoint(priv, handle_priv, endpoint); + if (current_interface < 0) { + usbi_err(ctx, "unable to match endpoint to an open interface - cannot clear"); + return LIBUSB_ERROR_NOT_FOUND; + } + + usbi_dbg("matched endpoint %02X with interface %d", endpoint, current_interface); + winusb_handle = handle_priv->interface_handle[current_interface].api_handle; + + if (!WinUSBX[sub_api].ResetPipe(winusb_handle, endpoint)) { + usbi_err(ctx, "ResetPipe failed: %s", windows_error_str(0)); + return LIBUSB_ERROR_NO_DEVICE; + } + + return LIBUSB_SUCCESS; +} + +/* + * from http://www.winvistatips.com/winusb-bugchecks-t335323.html (confirmed + * through testing as well): + * "You can not call WinUsb_AbortPipe on control pipe. You can possibly cancel + * the control transfer using CancelIo" + */ +static int winusbx_abort_control(int sub_api, struct usbi_transfer *itransfer) +{ + // Cancelling of the I/O is done in the parent + return LIBUSB_SUCCESS; +} + +static int winusbx_abort_transfers(int sub_api, struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + HANDLE winusb_handle; + int current_interface; + + CHECK_WINUSBX_AVAILABLE(sub_api); + + current_interface = transfer_priv->interface_number; + if ((current_interface < 0) || (current_interface >= USB_MAXINTERFACES)) { + usbi_err(ctx, "program assertion failed: invalid interface_number"); + return LIBUSB_ERROR_NOT_FOUND; + } + usbi_dbg("will use interface %d", current_interface); + + winusb_handle = handle_priv->interface_handle[current_interface].api_handle; + + if (!WinUSBX[sub_api].AbortPipe(winusb_handle, transfer->endpoint)) { + usbi_err(ctx, "AbortPipe failed: %s", windows_error_str(0)); + return LIBUSB_ERROR_NO_DEVICE; + } + + return LIBUSB_SUCCESS; +} + +/* + * from the "How to Use WinUSB to Communicate with a USB Device" Microsoft white paper + * (http://www.microsoft.com/whdc/connect/usb/winusb_howto.mspx): + * "WinUSB does not support host-initiated reset port and cycle port operations" and + * IOCTL_INTERNAL_USB_CYCLE_PORT is only available in kernel mode and the + * IOCTL_USB_HUB_CYCLE_PORT ioctl was removed from Vista => the best we can do is + * cycle the pipes (and even then, the control pipe can not be reset using WinUSB) + */ +// TODO: (post hotplug): see if we can force eject the device and redetect it (reuse hotplug?) +static int winusbx_reset_device(int sub_api, struct libusb_device_handle *dev_handle) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + struct winfd wfd; + HANDLE winusb_handle; + int i, j; + + CHECK_WINUSBX_AVAILABLE(sub_api); + + // Reset any available pipe (except control) + for (i = 0; i < USB_MAXINTERFACES; i++) { + winusb_handle = handle_priv->interface_handle[i].api_handle; + for (wfd = handle_to_winfd(winusb_handle); wfd.fd > 0; ) { + // Cancel any pollable I/O + usbi_remove_pollfd(ctx, wfd.fd); + usbi_free_fd(&wfd); + wfd = handle_to_winfd(winusb_handle); + } + + if (HANDLE_VALID(winusb_handle)) { + for (j = 0; j < priv->usb_interface[i].nb_endpoints; j++) { + usbi_dbg("resetting ep %02X", priv->usb_interface[i].endpoint[j]); + if (!WinUSBX[sub_api].AbortPipe(winusb_handle, priv->usb_interface[i].endpoint[j])) + usbi_err(ctx, "AbortPipe (pipe address %02X) failed: %s", + priv->usb_interface[i].endpoint[j], windows_error_str(0)); + + // FlushPipe seems to fail on OUT pipes + if (IS_EPIN(priv->usb_interface[i].endpoint[j]) + && (!WinUSBX[sub_api].FlushPipe(winusb_handle, priv->usb_interface[i].endpoint[j]))) + usbi_err(ctx, "FlushPipe (pipe address %02X) failed: %s", + priv->usb_interface[i].endpoint[j], windows_error_str(0)); + + if (!WinUSBX[sub_api].ResetPipe(winusb_handle, priv->usb_interface[i].endpoint[j])) + usbi_err(ctx, "ResetPipe (pipe address %02X) failed: %s", + priv->usb_interface[i].endpoint[j], windows_error_str(0)); + } + } + } + + // libusbK & libusb0 have the ability to issue an actual device reset + if (WinUSBX[sub_api].ResetDevice != NULL) { + winusb_handle = handle_priv->interface_handle[0].api_handle; + if (HANDLE_VALID(winusb_handle)) + WinUSBX[sub_api].ResetDevice(winusb_handle); + } + + return LIBUSB_SUCCESS; +} + +static int winusbx_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size) +{ + itransfer->transferred += io_size; + return LIBUSB_TRANSFER_COMPLETED; +} + +/* + * Internal HID Support functions (from libusb-win32) + * Note that functions that complete data transfer synchronously must return + * LIBUSB_COMPLETED instead of LIBUSB_SUCCESS + */ +static int _hid_get_hid_descriptor(struct hid_device_priv *dev, void *data, size_t *size); +static int _hid_get_report_descriptor(struct hid_device_priv *dev, void *data, size_t *size); + +static int _hid_wcslen(WCHAR *str) +{ + int i = 0; + + while (str[i] && (str[i] != 0x409)) + i++; + + return i; +} + +static int _hid_get_device_descriptor(struct hid_device_priv *dev, void *data, size_t *size) +{ + struct libusb_device_descriptor d; + + d.bLength = LIBUSB_DT_DEVICE_SIZE; + d.bDescriptorType = LIBUSB_DT_DEVICE; + d.bcdUSB = 0x0200; /* 2.00 */ + d.bDeviceClass = 0; + d.bDeviceSubClass = 0; + d.bDeviceProtocol = 0; + d.bMaxPacketSize0 = 64; /* fix this! */ + d.idVendor = (uint16_t)dev->vid; + d.idProduct = (uint16_t)dev->pid; + d.bcdDevice = 0x0100; + d.iManufacturer = dev->string_index[0]; + d.iProduct = dev->string_index[1]; + d.iSerialNumber = dev->string_index[2]; + d.bNumConfigurations = 1; + + if (*size > LIBUSB_DT_DEVICE_SIZE) + *size = LIBUSB_DT_DEVICE_SIZE; + memcpy(data, &d, *size); + + return LIBUSB_COMPLETED; +} + +static int _hid_get_config_descriptor(struct hid_device_priv *dev, void *data, size_t *size) +{ + char num_endpoints = 0; + size_t config_total_len = 0; + char tmp[HID_MAX_CONFIG_DESC_SIZE]; + struct libusb_config_descriptor *cd; + struct libusb_interface_descriptor *id; + struct libusb_hid_descriptor *hd; + struct libusb_endpoint_descriptor *ed; + size_t tmp_size; + + if (dev->input_report_size) + num_endpoints++; + if (dev->output_report_size) + num_endpoints++; + + config_total_len = LIBUSB_DT_CONFIG_SIZE + LIBUSB_DT_INTERFACE_SIZE + + LIBUSB_DT_HID_SIZE + num_endpoints * LIBUSB_DT_ENDPOINT_SIZE; + + cd = (struct libusb_config_descriptor *)tmp; + id = (struct libusb_interface_descriptor *)(tmp + LIBUSB_DT_CONFIG_SIZE); + hd = (struct libusb_hid_descriptor *)(tmp + LIBUSB_DT_CONFIG_SIZE + + LIBUSB_DT_INTERFACE_SIZE); + ed = (struct libusb_endpoint_descriptor *)(tmp + LIBUSB_DT_CONFIG_SIZE + + LIBUSB_DT_INTERFACE_SIZE + + LIBUSB_DT_HID_SIZE); + + cd->bLength = LIBUSB_DT_CONFIG_SIZE; + cd->bDescriptorType = LIBUSB_DT_CONFIG; + cd->wTotalLength = (uint16_t)config_total_len; + cd->bNumInterfaces = 1; + cd->bConfigurationValue = 1; + cd->iConfiguration = 0; + cd->bmAttributes = 1 << 7; /* bus powered */ + cd->MaxPower = 50; + + id->bLength = LIBUSB_DT_INTERFACE_SIZE; + id->bDescriptorType = LIBUSB_DT_INTERFACE; + id->bInterfaceNumber = 0; + id->bAlternateSetting = 0; + id->bNumEndpoints = num_endpoints; + id->bInterfaceClass = 3; + id->bInterfaceSubClass = 0; + id->bInterfaceProtocol = 0; + id->iInterface = 0; + + tmp_size = LIBUSB_DT_HID_SIZE; + _hid_get_hid_descriptor(dev, hd, &tmp_size); + + if (dev->input_report_size) { + ed->bLength = LIBUSB_DT_ENDPOINT_SIZE; + ed->bDescriptorType = LIBUSB_DT_ENDPOINT; + ed->bEndpointAddress = HID_IN_EP; + ed->bmAttributes = 3; + ed->wMaxPacketSize = dev->input_report_size - 1; + ed->bInterval = 10; + ed = (struct libusb_endpoint_descriptor *)((char *)ed + LIBUSB_DT_ENDPOINT_SIZE); + } + + if (dev->output_report_size) { + ed->bLength = LIBUSB_DT_ENDPOINT_SIZE; + ed->bDescriptorType = LIBUSB_DT_ENDPOINT; + ed->bEndpointAddress = HID_OUT_EP; + ed->bmAttributes = 3; + ed->wMaxPacketSize = dev->output_report_size - 1; + ed->bInterval = 10; + } + + if (*size > config_total_len) + *size = config_total_len; + memcpy(data, tmp, *size); + + return LIBUSB_COMPLETED; +} + +static int _hid_get_string_descriptor(struct hid_device_priv *dev, int _index, + void *data, size_t *size) +{ + void *tmp = NULL; + size_t tmp_size = 0; + int i; + + /* language ID, EN-US */ + char string_langid[] = {0x09, 0x04}; + + if ((*size < 2) || (*size > 255)) + return LIBUSB_ERROR_OVERFLOW; + + if (_index == 0) { + tmp = string_langid; + tmp_size = sizeof(string_langid) + 2; + } else { + for (i = 0; i < 3; i++) { + if (_index == (dev->string_index[i])) { + tmp = dev->string[i]; + tmp_size = (_hid_wcslen(dev->string[i]) + 1) * sizeof(WCHAR); + break; + } + } + + if (i == 3) // not found + return LIBUSB_ERROR_INVALID_PARAM; + } + + if (!tmp_size) + return LIBUSB_ERROR_INVALID_PARAM; + + if (tmp_size < *size) + *size = tmp_size; + + // 2 byte header + ((uint8_t *)data)[0] = (uint8_t)*size; + ((uint8_t *)data)[1] = LIBUSB_DT_STRING; + memcpy((uint8_t *)data + 2, tmp, *size - 2); + + return LIBUSB_COMPLETED; +} + +static int _hid_get_hid_descriptor(struct hid_device_priv *dev, void *data, size_t *size) +{ + struct libusb_hid_descriptor d; + uint8_t tmp[MAX_HID_DESCRIPTOR_SIZE]; + size_t report_len = MAX_HID_DESCRIPTOR_SIZE; + + _hid_get_report_descriptor(dev, tmp, &report_len); + + d.bLength = LIBUSB_DT_HID_SIZE; + d.bDescriptorType = LIBUSB_DT_HID; + d.bcdHID = 0x0110; /* 1.10 */ + d.bCountryCode = 0; + d.bNumDescriptors = 1; + d.bClassDescriptorType = LIBUSB_DT_REPORT; + d.wClassDescriptorLength = (uint16_t)report_len; + + if (*size > LIBUSB_DT_HID_SIZE) + *size = LIBUSB_DT_HID_SIZE; + memcpy(data, &d, *size); + + return LIBUSB_COMPLETED; +} + +static int _hid_get_report_descriptor(struct hid_device_priv *dev, void *data, size_t *size) +{ + uint8_t d[MAX_HID_DESCRIPTOR_SIZE]; + size_t i = 0; + + /* usage page (0xFFA0 == vendor defined) */ + d[i++] = 0x06; d[i++] = 0xA0; d[i++] = 0xFF; + /* usage (vendor defined) */ + d[i++] = 0x09; d[i++] = 0x01; + /* start collection (application) */ + d[i++] = 0xA1; d[i++] = 0x01; + /* input report */ + if (dev->input_report_size) { + /* usage (vendor defined) */ + d[i++] = 0x09; d[i++] = 0x01; + /* logical minimum (0) */ + d[i++] = 0x15; d[i++] = 0x00; + /* logical maximum (255) */ + d[i++] = 0x25; d[i++] = 0xFF; + /* report size (8 bits) */ + d[i++] = 0x75; d[i++] = 0x08; + /* report count */ + d[i++] = 0x95; d[i++] = (uint8_t)dev->input_report_size - 1; + /* input (data, variable, absolute) */ + d[i++] = 0x81; d[i++] = 0x00; + } + /* output report */ + if (dev->output_report_size) { + /* usage (vendor defined) */ + d[i++] = 0x09; d[i++] = 0x02; + /* logical minimum (0) */ + d[i++] = 0x15; d[i++] = 0x00; + /* logical maximum (255) */ + d[i++] = 0x25; d[i++] = 0xFF; + /* report size (8 bits) */ + d[i++] = 0x75; d[i++] = 0x08; + /* report count */ + d[i++] = 0x95; d[i++] = (uint8_t)dev->output_report_size - 1; + /* output (data, variable, absolute) */ + d[i++] = 0x91; d[i++] = 0x00; + } + /* feature report */ + if (dev->feature_report_size) { + /* usage (vendor defined) */ + d[i++] = 0x09; d[i++] = 0x03; + /* logical minimum (0) */ + d[i++] = 0x15; d[i++] = 0x00; + /* logical maximum (255) */ + d[i++] = 0x25; d[i++] = 0xFF; + /* report size (8 bits) */ + d[i++] = 0x75; d[i++] = 0x08; + /* report count */ + d[i++] = 0x95; d[i++] = (uint8_t)dev->feature_report_size - 1; + /* feature (data, variable, absolute) */ + d[i++] = 0xb2; d[i++] = 0x02; d[i++] = 0x01; + } + + /* end collection */ + d[i++] = 0xC0; + + if (*size > i) + *size = i; + memcpy(data, d, *size); + + return LIBUSB_COMPLETED; +} + +static int _hid_get_descriptor(struct hid_device_priv *dev, HANDLE hid_handle, int recipient, + int type, int _index, void *data, size_t *size) +{ + switch(type) { + case LIBUSB_DT_DEVICE: + usbi_dbg("LIBUSB_DT_DEVICE"); + return _hid_get_device_descriptor(dev, data, size); + case LIBUSB_DT_CONFIG: + usbi_dbg("LIBUSB_DT_CONFIG"); + if (!_index) + return _hid_get_config_descriptor(dev, data, size); + return LIBUSB_ERROR_INVALID_PARAM; + case LIBUSB_DT_STRING: + usbi_dbg("LIBUSB_DT_STRING"); + return _hid_get_string_descriptor(dev, _index, data, size); + case LIBUSB_DT_HID: + usbi_dbg("LIBUSB_DT_HID"); + if (!_index) + return _hid_get_hid_descriptor(dev, data, size); + return LIBUSB_ERROR_INVALID_PARAM; + case LIBUSB_DT_REPORT: + usbi_dbg("LIBUSB_DT_REPORT"); + if (!_index) + return _hid_get_report_descriptor(dev, data, size); + return LIBUSB_ERROR_INVALID_PARAM; + case LIBUSB_DT_PHYSICAL: + usbi_dbg("LIBUSB_DT_PHYSICAL"); + if (HidD_GetPhysicalDescriptor(hid_handle, data, (ULONG)*size)) + return LIBUSB_COMPLETED; + return LIBUSB_ERROR_OTHER; + } + + usbi_dbg("unsupported"); + return LIBUSB_ERROR_NOT_SUPPORTED; +} + +static int _hid_get_report(struct hid_device_priv *dev, HANDLE hid_handle, int id, void *data, + struct windows_transfer_priv *tp, size_t *size, OVERLAPPED *overlapped, int report_type) +{ + uint8_t *buf; + DWORD ioctl_code, read_size, expected_size = (DWORD)*size; + int r = LIBUSB_SUCCESS; + + if (tp->hid_buffer != NULL) + usbi_dbg("program assertion failed: hid_buffer is not NULL"); + + if ((*size == 0) || (*size > MAX_HID_REPORT_SIZE)) { + usbi_dbg("invalid size (%u)", *size); + return LIBUSB_ERROR_INVALID_PARAM; + } + + switch (report_type) { + case HID_REPORT_TYPE_INPUT: + ioctl_code = IOCTL_HID_GET_INPUT_REPORT; + break; + case HID_REPORT_TYPE_FEATURE: + ioctl_code = IOCTL_HID_GET_FEATURE; + break; + default: + usbi_dbg("unknown HID report type %d", report_type); + return LIBUSB_ERROR_INVALID_PARAM; + } + + // Add a trailing byte to detect overflows + buf = calloc(1, expected_size + 1); + if (buf == NULL) + return LIBUSB_ERROR_NO_MEM; + + buf[0] = (uint8_t)id; // Must be set always + usbi_dbg("report ID: 0x%02X", buf[0]); + + tp->hid_expected_size = expected_size; + read_size = expected_size; + + // NB: The size returned by DeviceIoControl doesn't include report IDs when not in use (0) + if (!DeviceIoControl(hid_handle, ioctl_code, buf, expected_size + 1, + buf, expected_size + 1, &read_size, overlapped)) { + if (GetLastError() != ERROR_IO_PENDING) { + usbi_dbg("Failed to Read HID Report: %s", windows_error_str(0)); + free(buf); + return LIBUSB_ERROR_IO; + } + // Asynchronous wait + tp->hid_buffer = buf; + tp->hid_dest = data; // copy dest, as not necessarily the start of the transfer buffer + return LIBUSB_SUCCESS; + } + + // Transfer completed synchronously => copy and discard extra buffer + if (read_size == 0) { + usbi_warn(NULL, "program assertion failed - read completed synchronously, but no data was read"); + *size = 0; + } else { + if (buf[0] != id) + usbi_warn(NULL, "mismatched report ID (data is %02X, parameter is %02X)", buf[0], id); + + if ((size_t)read_size > expected_size) { + r = LIBUSB_ERROR_OVERFLOW; + usbi_dbg("OVERFLOW!"); + } else { + r = LIBUSB_COMPLETED; + } + + *size = MIN((size_t)read_size, *size); + if (id == 0) + memcpy(data, buf + 1, *size); // Discard report ID + else + memcpy(data, buf, *size); + } + + free(buf); + return r; +} + +static int _hid_set_report(struct hid_device_priv *dev, HANDLE hid_handle, int id, void *data, + struct windows_transfer_priv *tp, size_t *size, OVERLAPPED *overlapped, int report_type) +{ + uint8_t *buf = NULL; + DWORD ioctl_code, write_size = (DWORD)*size; + + if (tp->hid_buffer != NULL) + usbi_dbg("program assertion failed: hid_buffer is not NULL"); + + if ((*size == 0) || (*size > MAX_HID_REPORT_SIZE)) { + usbi_dbg("invalid size (%u)", *size); + return LIBUSB_ERROR_INVALID_PARAM; + } + + switch (report_type) { + case HID_REPORT_TYPE_OUTPUT: + ioctl_code = IOCTL_HID_SET_OUTPUT_REPORT; + break; + case HID_REPORT_TYPE_FEATURE: + ioctl_code = IOCTL_HID_SET_FEATURE; + break; + default: + usbi_dbg("unknown HID report type %d", report_type); + return LIBUSB_ERROR_INVALID_PARAM; + } + + usbi_dbg("report ID: 0x%02X", id); + // When report IDs are not used (i.e. when id == 0), we must add + // a null report ID. Otherwise, we just use original data buffer + if (id == 0) + write_size++; + + buf = malloc(write_size); + if (buf == NULL) + return LIBUSB_ERROR_NO_MEM; + + if (id == 0) { + buf[0] = 0; + memcpy(buf + 1, data, *size); + } else { + // This seems like a waste, but if we don't duplicate the + // data, we'll get issues when freeing hid_buffer + memcpy(buf, data, *size); + if (buf[0] != id) + usbi_warn(NULL, "mismatched report ID (data is %02X, parameter is %02X)", buf[0], id); + } + + // NB: The size returned by DeviceIoControl doesn't include report IDs when not in use (0) + if (!DeviceIoControl(hid_handle, ioctl_code, buf, write_size, + buf, write_size, &write_size, overlapped)) { + if (GetLastError() != ERROR_IO_PENDING) { + usbi_dbg("Failed to Write HID Output Report: %s", windows_error_str(0)); + free(buf); + return LIBUSB_ERROR_IO; + } + tp->hid_buffer = buf; + tp->hid_dest = NULL; + return LIBUSB_SUCCESS; + } + + // Transfer completed synchronously + *size = write_size; + if (write_size == 0) + usbi_dbg("program assertion failed - write completed synchronously, but no data was written"); + + free(buf); + return LIBUSB_COMPLETED; +} + +static int _hid_class_request(struct hid_device_priv *dev, HANDLE hid_handle, int request_type, + int request, int value, int _index, void *data, struct windows_transfer_priv *tp, + size_t *size, OVERLAPPED *overlapped) +{ + int report_type = (value >> 8) & 0xFF; + int report_id = value & 0xFF; + + if ((LIBUSB_REQ_RECIPIENT(request_type) != LIBUSB_RECIPIENT_INTERFACE) + && (LIBUSB_REQ_RECIPIENT(request_type) != LIBUSB_RECIPIENT_DEVICE)) + return LIBUSB_ERROR_INVALID_PARAM; + + if (LIBUSB_REQ_OUT(request_type) && request == HID_REQ_SET_REPORT) + return _hid_set_report(dev, hid_handle, report_id, data, tp, size, overlapped, report_type); + + if (LIBUSB_REQ_IN(request_type) && request == HID_REQ_GET_REPORT) + return _hid_get_report(dev, hid_handle, report_id, data, tp, size, overlapped, report_type); + + return LIBUSB_ERROR_INVALID_PARAM; +} + + +/* + * HID API functions + */ +static int hid_init(int sub_api, struct libusb_context *ctx) +{ + DLL_GET_HANDLE(hid); + DLL_LOAD_FUNC(hid, HidD_GetAttributes, TRUE); + DLL_LOAD_FUNC(hid, HidD_GetHidGuid, TRUE); + DLL_LOAD_FUNC(hid, HidD_GetPreparsedData, TRUE); + DLL_LOAD_FUNC(hid, HidD_FreePreparsedData, TRUE); + DLL_LOAD_FUNC(hid, HidD_GetManufacturerString, TRUE); + DLL_LOAD_FUNC(hid, HidD_GetProductString, TRUE); + DLL_LOAD_FUNC(hid, HidD_GetSerialNumberString, TRUE); + DLL_LOAD_FUNC(hid, HidP_GetCaps, TRUE); + DLL_LOAD_FUNC(hid, HidD_SetNumInputBuffers, TRUE); + DLL_LOAD_FUNC(hid, HidD_SetFeature, TRUE); + DLL_LOAD_FUNC(hid, HidD_GetFeature, TRUE); + DLL_LOAD_FUNC(hid, HidD_GetPhysicalDescriptor, TRUE); + DLL_LOAD_FUNC(hid, HidD_GetInputReport, FALSE); + DLL_LOAD_FUNC(hid, HidD_SetOutputReport, FALSE); + DLL_LOAD_FUNC(hid, HidD_FlushQueue, TRUE); + DLL_LOAD_FUNC(hid, HidP_GetValueCaps, TRUE); + + api_hid_available = true; + return LIBUSB_SUCCESS; +} + +static int hid_exit(int sub_api) +{ + DLL_FREE_HANDLE(hid); + + return LIBUSB_SUCCESS; +} + +// NB: open and close must ensure that they only handle interface of +// the right API type, as these functions can be called wholesale from +// composite_open(), with interfaces belonging to different APIs +static int hid_open(int sub_api, struct libusb_device_handle *dev_handle) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + HIDD_ATTRIBUTES hid_attributes; + PHIDP_PREPARSED_DATA preparsed_data = NULL; + HIDP_CAPS capabilities; + HIDP_VALUE_CAPS *value_caps; + HANDLE hid_handle = INVALID_HANDLE_VALUE; + int i, j; + // report IDs handling + ULONG size[3]; + int nb_ids[2]; // zero and nonzero report IDs +#if defined(ENABLE_LOGGING) + const char *type[3] = {"input", "output", "feature"}; +#endif + + CHECK_HID_AVAILABLE; + + if (priv->hid == NULL) { + usbi_err(ctx, "program assertion failed - private HID structure is unitialized"); + return LIBUSB_ERROR_NOT_FOUND; + } + + for (i = 0; i < USB_MAXINTERFACES; i++) { + if ((priv->usb_interface[i].path != NULL) + && (priv->usb_interface[i].apib->id == USB_API_HID)) { + hid_handle = CreateFileA(priv->usb_interface[i].path, GENERIC_WRITE | GENERIC_READ, FILE_SHARE_WRITE | FILE_SHARE_READ, + NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL); + /* + * http://www.lvr.com/hidfaq.htm: Why do I receive "Access denied" when attempting to access my HID? + * "Windows 2000 and later have exclusive read/write access to HIDs that are configured as a system + * keyboards or mice. An application can obtain a handle to a system keyboard or mouse by not + * requesting READ or WRITE access with CreateFile. Applications can then use HidD_SetFeature and + * HidD_GetFeature (if the device supports Feature reports)." + */ + if (hid_handle == INVALID_HANDLE_VALUE) { + usbi_warn(ctx, "could not open HID device in R/W mode (keyboard or mouse?) - trying without"); + hid_handle = CreateFileA(priv->usb_interface[i].path, 0, FILE_SHARE_WRITE | FILE_SHARE_READ, + NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL); + if (hid_handle == INVALID_HANDLE_VALUE) { + usbi_err(ctx, "could not open device %s (interface %d): %s", priv->path, i, windows_error_str(0)); + switch(GetLastError()) { + case ERROR_FILE_NOT_FOUND: // The device was disconnected + return LIBUSB_ERROR_NO_DEVICE; + case ERROR_ACCESS_DENIED: + return LIBUSB_ERROR_ACCESS; + default: + return LIBUSB_ERROR_IO; + } + } + priv->usb_interface[i].restricted_functionality = true; + } + handle_priv->interface_handle[i].api_handle = hid_handle; + } + } + + hid_attributes.Size = sizeof(hid_attributes); + do { + if (!HidD_GetAttributes(hid_handle, &hid_attributes)) { + usbi_err(ctx, "could not gain access to HID top collection (HidD_GetAttributes)"); + break; + } + + priv->hid->vid = hid_attributes.VendorID; + priv->hid->pid = hid_attributes.ProductID; + + // Set the maximum available input buffer size + for (i = 32; HidD_SetNumInputBuffers(hid_handle, i); i *= 2); + usbi_dbg("set maximum input buffer size to %d", i / 2); + + // Get the maximum input and output report size + if (!HidD_GetPreparsedData(hid_handle, &preparsed_data) || !preparsed_data) { + usbi_err(ctx, "could not read HID preparsed data (HidD_GetPreparsedData)"); + break; + } + if (HidP_GetCaps(preparsed_data, &capabilities) != HIDP_STATUS_SUCCESS) { + usbi_err(ctx, "could not parse HID capabilities (HidP_GetCaps)"); + break; + } + + // Find out if interrupt will need report IDs + size[0] = capabilities.NumberInputValueCaps; + size[1] = capabilities.NumberOutputValueCaps; + size[2] = capabilities.NumberFeatureValueCaps; + for (j = HidP_Input; j <= HidP_Feature; j++) { + usbi_dbg("%u HID %s report value(s) found", (unsigned int)size[j], type[j]); + priv->hid->uses_report_ids[j] = false; + if (size[j] > 0) { + value_caps = calloc(size[j], sizeof(HIDP_VALUE_CAPS)); + if ((value_caps != NULL) + && (HidP_GetValueCaps((HIDP_REPORT_TYPE)j, value_caps, &size[j], preparsed_data) == HIDP_STATUS_SUCCESS) + && (size[j] >= 1)) { + nb_ids[0] = 0; + nb_ids[1] = 0; + for (i = 0; i < (int)size[j]; i++) { + usbi_dbg(" Report ID: 0x%02X", value_caps[i].ReportID); + if (value_caps[i].ReportID != 0) + nb_ids[1]++; + else + nb_ids[0]++; + } + if (nb_ids[1] != 0) { + if (nb_ids[0] != 0) + usbi_warn(ctx, "program assertion failed: zero and nonzero report IDs used for %s", + type[j]); + priv->hid->uses_report_ids[j] = true; + } + } else { + usbi_warn(ctx, " could not process %s report IDs", type[j]); + } + free(value_caps); + } + } + + // Set the report sizes + priv->hid->input_report_size = capabilities.InputReportByteLength; + priv->hid->output_report_size = capabilities.OutputReportByteLength; + priv->hid->feature_report_size = capabilities.FeatureReportByteLength; + + // Fetch string descriptors + priv->hid->string_index[0] = priv->dev_descriptor.iManufacturer; + if (priv->hid->string_index[0] != 0) + HidD_GetManufacturerString(hid_handle, priv->hid->string[0], sizeof(priv->hid->string[0])); + else + priv->hid->string[0][0] = 0; + + priv->hid->string_index[1] = priv->dev_descriptor.iProduct; + if (priv->hid->string_index[1] != 0) + HidD_GetProductString(hid_handle, priv->hid->string[1], sizeof(priv->hid->string[1])); + else + priv->hid->string[1][0] = 0; + + priv->hid->string_index[2] = priv->dev_descriptor.iSerialNumber; + if (priv->hid->string_index[2] != 0) + HidD_GetSerialNumberString(hid_handle, priv->hid->string[2], sizeof(priv->hid->string[2])); + else + priv->hid->string[2][0] = 0; + } while(0); + + if (preparsed_data) + HidD_FreePreparsedData(preparsed_data); + + return LIBUSB_SUCCESS; +} + +static void hid_close(int sub_api, struct libusb_device_handle *dev_handle) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + HANDLE file_handle; + int i; + + if (!api_hid_available) + return; + + for (i = 0; i < USB_MAXINTERFACES; i++) { + if (priv->usb_interface[i].apib->id == USB_API_HID) { + file_handle = handle_priv->interface_handle[i].api_handle; + if (HANDLE_VALID(file_handle)) + CloseHandle(file_handle); + } + } +} + +static int hid_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + + CHECK_HID_AVAILABLE; + + // NB: Disconnection detection is not possible in this function + if (priv->usb_interface[iface].path == NULL) + return LIBUSB_ERROR_NOT_FOUND; // invalid iface + + // We use dev_handle as a flag for interface claimed + if (handle_priv->interface_handle[iface].dev_handle == INTERFACE_CLAIMED) + return LIBUSB_ERROR_BUSY; // already claimed + + + handle_priv->interface_handle[iface].dev_handle = INTERFACE_CLAIMED; + + usbi_dbg("claimed interface %d", iface); + handle_priv->active_interface = iface; + + return LIBUSB_SUCCESS; +} + +static int hid_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + + CHECK_HID_AVAILABLE; + + if (priv->usb_interface[iface].path == NULL) + return LIBUSB_ERROR_NOT_FOUND; // invalid iface + + if (handle_priv->interface_handle[iface].dev_handle != INTERFACE_CLAIMED) + return LIBUSB_ERROR_NOT_FOUND; // invalid iface + + handle_priv->interface_handle[iface].dev_handle = INVALID_HANDLE_VALUE; + + return LIBUSB_SUCCESS; +} + +static int hid_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + + CHECK_HID_AVAILABLE; + + if (altsetting > 255) + return LIBUSB_ERROR_INVALID_PARAM; + + if (altsetting != 0) { + usbi_err(ctx, "set interface altsetting not supported for altsetting >0"); + return LIBUSB_ERROR_NOT_SUPPORTED; + } + + return LIBUSB_SUCCESS; +} + +static int hid_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + WINUSB_SETUP_PACKET *setup = (WINUSB_SETUP_PACKET *)transfer->buffer; + HANDLE hid_handle; + struct winfd wfd; + int current_interface, config; + size_t size; + int r = LIBUSB_ERROR_INVALID_PARAM; + + CHECK_HID_AVAILABLE; + + transfer_priv->pollable_fd = INVALID_WINFD; + safe_free(transfer_priv->hid_buffer); + transfer_priv->hid_dest = NULL; + size = transfer->length - LIBUSB_CONTROL_SETUP_SIZE; + + if (size > MAX_CTRL_BUFFER_LENGTH) + return LIBUSB_ERROR_INVALID_PARAM; + + current_interface = get_valid_interface(transfer->dev_handle, USB_API_HID); + if (current_interface < 0) { + if (auto_claim(transfer, ¤t_interface, USB_API_HID) != LIBUSB_SUCCESS) + return LIBUSB_ERROR_NOT_FOUND; + } + + usbi_dbg("will use interface %d", current_interface); + hid_handle = handle_priv->interface_handle[current_interface].api_handle; + // Always use the handle returned from usbi_create_fd (wfd.handle) + wfd = usbi_create_fd(hid_handle, RW_READ, NULL, NULL); + if (wfd.fd < 0) + return LIBUSB_ERROR_NOT_FOUND; + + switch(LIBUSB_REQ_TYPE(setup->request_type)) { + case LIBUSB_REQUEST_TYPE_STANDARD: + switch(setup->request) { + case LIBUSB_REQUEST_GET_DESCRIPTOR: + r = _hid_get_descriptor(priv->hid, wfd.handle, LIBUSB_REQ_RECIPIENT(setup->request_type), + (setup->value >> 8) & 0xFF, setup->value & 0xFF, transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE, &size); + break; + case LIBUSB_REQUEST_GET_CONFIGURATION: + r = windows_get_configuration(transfer->dev_handle, &config); + if (r == LIBUSB_SUCCESS) { + size = 1; + ((uint8_t *)transfer->buffer)[LIBUSB_CONTROL_SETUP_SIZE] = (uint8_t)config; + r = LIBUSB_COMPLETED; + } + break; + case LIBUSB_REQUEST_SET_CONFIGURATION: + if (setup->value == priv->active_config) { + r = LIBUSB_COMPLETED; + } else { + usbi_warn(ctx, "cannot set configuration other than the default one"); + r = LIBUSB_ERROR_NOT_SUPPORTED; + } + break; + case LIBUSB_REQUEST_GET_INTERFACE: + size = 1; + ((uint8_t *)transfer->buffer)[LIBUSB_CONTROL_SETUP_SIZE] = 0; + r = LIBUSB_COMPLETED; + break; + case LIBUSB_REQUEST_SET_INTERFACE: + r = hid_set_interface_altsetting(0, transfer->dev_handle, setup->index, setup->value); + if (r == LIBUSB_SUCCESS) + r = LIBUSB_COMPLETED; + break; + default: + usbi_warn(ctx, "unsupported HID control request"); + r = LIBUSB_ERROR_NOT_SUPPORTED; + break; + } + break; + case LIBUSB_REQUEST_TYPE_CLASS: + r = _hid_class_request(priv->hid, wfd.handle, setup->request_type, setup->request, setup->value, + setup->index, transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE, transfer_priv, + &size, wfd.overlapped); + break; + default: + usbi_warn(ctx, "unsupported HID control request"); + r = LIBUSB_ERROR_NOT_SUPPORTED; + break; + } + + if (r == LIBUSB_COMPLETED) { + // Force request to be completed synchronously. Transferred size has been set by previous call + wfd.overlapped->Internal = STATUS_COMPLETED_SYNCHRONOUSLY; + // http://msdn.microsoft.com/en-us/library/ms684342%28VS.85%29.aspx + // set InternalHigh to the number of bytes transferred + wfd.overlapped->InternalHigh = (DWORD)size; + r = LIBUSB_SUCCESS; + } + + if (r == LIBUSB_SUCCESS) { + // Use priv_transfer to store data needed for async polling + transfer_priv->pollable_fd = wfd; + transfer_priv->interface_number = (uint8_t)current_interface; + } else { + usbi_free_fd(&wfd); + } + + return r; +} + +static int hid_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + struct winfd wfd; + HANDLE hid_handle; + bool direction_in, ret; + int current_interface, length; + DWORD size; + int r = LIBUSB_SUCCESS; + + CHECK_HID_AVAILABLE; + + transfer_priv->pollable_fd = INVALID_WINFD; + transfer_priv->hid_dest = NULL; + safe_free(transfer_priv->hid_buffer); + + current_interface = interface_by_endpoint(priv, handle_priv, transfer->endpoint); + if (current_interface < 0) { + usbi_err(ctx, "unable to match endpoint to an open interface - cancelling transfer"); + return LIBUSB_ERROR_NOT_FOUND; + } + + usbi_dbg("matched endpoint %02X with interface %d", transfer->endpoint, current_interface); + + hid_handle = handle_priv->interface_handle[current_interface].api_handle; + direction_in = transfer->endpoint & LIBUSB_ENDPOINT_IN; + + wfd = usbi_create_fd(hid_handle, direction_in?RW_READ:RW_WRITE, NULL, NULL); + // Always use the handle returned from usbi_create_fd (wfd.handle) + if (wfd.fd < 0) + return LIBUSB_ERROR_NO_MEM; + + // If report IDs are not in use, an extra prefix byte must be added + if (((direction_in) && (!priv->hid->uses_report_ids[0])) + || ((!direction_in) && (!priv->hid->uses_report_ids[1]))) + length = transfer->length + 1; + else + length = transfer->length; + + // Add a trailing byte to detect overflows on input + transfer_priv->hid_buffer = calloc(1, length + 1); + if (transfer_priv->hid_buffer == NULL) + return LIBUSB_ERROR_NO_MEM; + + transfer_priv->hid_expected_size = length; + + if (direction_in) { + transfer_priv->hid_dest = transfer->buffer; + usbi_dbg("reading %d bytes (report ID: 0x00)", length); + ret = ReadFile(wfd.handle, transfer_priv->hid_buffer, length + 1, &size, wfd.overlapped); + } else { + if (!priv->hid->uses_report_ids[1]) + memcpy(transfer_priv->hid_buffer + 1, transfer->buffer, transfer->length); + else + // We could actually do without the calloc and memcpy in this case + memcpy(transfer_priv->hid_buffer, transfer->buffer, transfer->length); + + usbi_dbg("writing %d bytes (report ID: 0x%02X)", length, transfer_priv->hid_buffer[0]); + ret = WriteFile(wfd.handle, transfer_priv->hid_buffer, length, &size, wfd.overlapped); + } + + if (!ret) { + if (GetLastError() != ERROR_IO_PENDING) { + usbi_err(ctx, "HID transfer failed: %s", windows_error_str(0)); + usbi_free_fd(&wfd); + safe_free(transfer_priv->hid_buffer); + return LIBUSB_ERROR_IO; + } + } else { + // Only write operations that completed synchronously need to free up + // hid_buffer. For reads, copy_transfer_data() handles that process. + if (!direction_in) + safe_free(transfer_priv->hid_buffer); + + if (size == 0) { + usbi_err(ctx, "program assertion failed - no data was transferred"); + size = 1; + } + if (size > (size_t)length) { + usbi_err(ctx, "OVERFLOW!"); + r = LIBUSB_ERROR_OVERFLOW; + } + wfd.overlapped->Internal = STATUS_COMPLETED_SYNCHRONOUSLY; + wfd.overlapped->InternalHigh = size; + } + + transfer_priv->pollable_fd = wfd; + transfer_priv->interface_number = (uint8_t)current_interface; + + return r; +} + +static int hid_abort_transfers(int sub_api, struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle); + HANDLE hid_handle; + int current_interface; + + CHECK_HID_AVAILABLE; + + current_interface = transfer_priv->interface_number; + hid_handle = handle_priv->interface_handle[current_interface].api_handle; + CancelIo(hid_handle); + + return LIBUSB_SUCCESS; +} + +static int hid_reset_device(int sub_api, struct libusb_device_handle *dev_handle) +{ + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + HANDLE hid_handle; + int current_interface; + + CHECK_HID_AVAILABLE; + + // Flushing the queues on all interfaces is the best we can achieve + for (current_interface = 0; current_interface < USB_MAXINTERFACES; current_interface++) { + hid_handle = handle_priv->interface_handle[current_interface].api_handle; + if (HANDLE_VALID(hid_handle)) + HidD_FlushQueue(hid_handle); + } + + return LIBUSB_SUCCESS; +} + +static int hid_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + HANDLE hid_handle; + int current_interface; + + CHECK_HID_AVAILABLE; + + current_interface = interface_by_endpoint(priv, handle_priv, endpoint); + if (current_interface < 0) { + usbi_err(ctx, "unable to match endpoint to an open interface - cannot clear"); + return LIBUSB_ERROR_NOT_FOUND; + } + + usbi_dbg("matched endpoint %02X with interface %d", endpoint, current_interface); + hid_handle = handle_priv->interface_handle[current_interface].api_handle; + + // No endpoint selection with Microsoft's implementation, so we try to flush the + // whole interface. Should be OK for most case scenarios + if (!HidD_FlushQueue(hid_handle)) { + usbi_err(ctx, "Flushing of HID queue failed: %s", windows_error_str(0)); + // Device was probably disconnected + return LIBUSB_ERROR_NO_DEVICE; + } + + return LIBUSB_SUCCESS; +} + +// This extra function is only needed for HID +static int hid_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + int r = LIBUSB_TRANSFER_COMPLETED; + uint32_t corrected_size = io_size; + + if (transfer_priv->hid_buffer != NULL) { + // If we have a valid hid_buffer, it means the transfer was async + if (transfer_priv->hid_dest != NULL) { // Data readout + if (corrected_size > 0) { + // First, check for overflow + if (corrected_size > transfer_priv->hid_expected_size) { + usbi_err(ctx, "OVERFLOW!"); + corrected_size = (uint32_t)transfer_priv->hid_expected_size; + r = LIBUSB_TRANSFER_OVERFLOW; + } + + if (transfer_priv->hid_buffer[0] == 0) { + // Discard the 1 byte report ID prefix + corrected_size--; + memcpy(transfer_priv->hid_dest, transfer_priv->hid_buffer + 1, corrected_size); + } else { + memcpy(transfer_priv->hid_dest, transfer_priv->hid_buffer, corrected_size); + } + } + transfer_priv->hid_dest = NULL; + } + // For write, we just need to free the hid buffer + safe_free(transfer_priv->hid_buffer); + } + + itransfer->transferred += corrected_size; + return r; +} + + +/* + * Composite API functions + */ +static int composite_init(int sub_api, struct libusb_context *ctx) +{ + return LIBUSB_SUCCESS; +} + +static int composite_exit(int sub_api) +{ + return LIBUSB_SUCCESS; +} + +static int composite_open(int sub_api, struct libusb_device_handle *dev_handle) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + int r = LIBUSB_ERROR_NOT_FOUND; + uint8_t i; + // SUB_API_MAX + 1 as the SUB_API_MAX pos is used to indicate availability of HID + bool available[SUB_API_MAX + 1] = { 0 }; + + for (i = 0; i < USB_MAXINTERFACES; i++) { + switch (priv->usb_interface[i].apib->id) { + case USB_API_WINUSBX: + if (priv->usb_interface[i].sub_api != SUB_API_NOTSET) + available[priv->usb_interface[i].sub_api] = true; + break; + case USB_API_HID: + available[SUB_API_MAX] = true; + break; + default: + break; + } + } + + for (i = 0; i < SUB_API_MAX; i++) { // WinUSB-like drivers + if (available[i]) { + r = usb_api_backend[USB_API_WINUSBX].open(i, dev_handle); + if (r != LIBUSB_SUCCESS) + return r; + } + } + + if (available[SUB_API_MAX]) // HID driver + r = hid_open(SUB_API_NOTSET, dev_handle); + + return r; +} + +static void composite_close(int sub_api, struct libusb_device_handle *dev_handle) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + uint8_t i; + // SUB_API_MAX + 1 as the SUB_API_MAX pos is used to indicate availability of HID + bool available[SUB_API_MAX + 1] = { 0 }; + + for (i = 0; i < USB_MAXINTERFACES; i++) { + switch (priv->usb_interface[i].apib->id) { + case USB_API_WINUSBX: + if (priv->usb_interface[i].sub_api != SUB_API_NOTSET) + available[priv->usb_interface[i].sub_api] = true; + break; + case USB_API_HID: + available[SUB_API_MAX] = true; + break; + default: + break; + } + } + + for (i = 0; i < SUB_API_MAX; i++) { // WinUSB-like drivers + if (available[i]) + usb_api_backend[USB_API_WINUSBX].close(i, dev_handle); + } + + if (available[SUB_API_MAX]) // HID driver + hid_close(SUB_API_NOTSET, dev_handle); +} + +static int composite_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + + return priv->usb_interface[iface].apib-> + claim_interface(priv->usb_interface[iface].sub_api, dev_handle, iface); +} + +static int composite_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + + return priv->usb_interface[iface].apib-> + set_interface_altsetting(priv->usb_interface[iface].sub_api, dev_handle, iface, altsetting); +} + +static int composite_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + + return priv->usb_interface[iface].apib-> + release_interface(priv->usb_interface[iface].sub_api, dev_handle, iface); +} + +static int composite_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + struct libusb_config_descriptor *conf_desc; + WINUSB_SETUP_PACKET *setup = (WINUSB_SETUP_PACKET *)transfer->buffer; + int iface, pass, r; + + // Interface shouldn't matter for control, but it does in practice, with Windows' + // restrictions with regards to accessing HID keyboards and mice. Try to target + // a specific interface first, if possible. + switch (LIBUSB_REQ_RECIPIENT(setup->request_type)) { + case LIBUSB_RECIPIENT_INTERFACE: + iface = setup->index & 0xFF; + break; + case LIBUSB_RECIPIENT_ENDPOINT: + r = libusb_get_active_config_descriptor(transfer->dev_handle->dev, &conf_desc); + if (r == LIBUSB_SUCCESS) { + iface = get_interface_by_endpoint(conf_desc, (setup->index & 0xFF)); + libusb_free_config_descriptor(conf_desc); + break; + } + // Fall through if not able to determine interface + default: + iface = -1; + break; + } + + // Try and target a specific interface if the control setup indicates such + if ((iface >= 0) && (iface < USB_MAXINTERFACES)) { + usbi_dbg("attempting control transfer targeted to interface %d", iface); + if (priv->usb_interface[iface].path != NULL) { + r = priv->usb_interface[iface].apib->submit_control_transfer(priv->usb_interface[iface].sub_api, itransfer); + if (r == LIBUSB_SUCCESS) + return r; + } + } + + // Either not targeted to a specific interface or no luck in doing so. + // Try a 2 pass approach with all interfaces. + for (pass = 0; pass < 2; pass++) { + for (iface = 0; iface < USB_MAXINTERFACES; iface++) { + if (priv->usb_interface[iface].path != NULL) { + if ((pass == 0) && (priv->usb_interface[iface].restricted_functionality)) { + usbi_dbg("trying to skip restricted interface #%d (HID keyboard or mouse?)", iface); + continue; + } + usbi_dbg("using interface %d", iface); + r = priv->usb_interface[iface].apib->submit_control_transfer(priv->usb_interface[iface].sub_api, itransfer); + // If not supported on this API, it may be supported on another, so don't give up yet!! + if (r == LIBUSB_ERROR_NOT_SUPPORTED) + continue; + return r; + } + } + } + + usbi_err(ctx, "no libusb supported interfaces to complete request"); + return LIBUSB_ERROR_NOT_FOUND; +} + +static int composite_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + int current_interface; + + current_interface = interface_by_endpoint(priv, handle_priv, transfer->endpoint); + if (current_interface < 0) { + usbi_err(ctx, "unable to match endpoint to an open interface - cancelling transfer"); + return LIBUSB_ERROR_NOT_FOUND; + } + + return priv->usb_interface[current_interface].apib-> + submit_bulk_transfer(priv->usb_interface[current_interface].sub_api, itransfer); +} + +static int composite_submit_iso_transfer(int sub_api, struct usbi_transfer *itransfer) { + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + int current_interface; + + current_interface = interface_by_endpoint(priv, handle_priv, transfer->endpoint); + if (current_interface < 0) { + usbi_err(ctx, "unable to match endpoint to an open interface - cancelling transfer"); + return LIBUSB_ERROR_NOT_FOUND; + } + + return priv->usb_interface[current_interface].apib-> + submit_iso_transfer(priv->usb_interface[current_interface].sub_api, itransfer); +} + +static int composite_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint) +{ + struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev); + struct windows_device_handle_priv *handle_priv = _device_handle_priv(dev_handle); + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + int current_interface; + + current_interface = interface_by_endpoint(priv, handle_priv, endpoint); + if (current_interface < 0) { + usbi_err(ctx, "unable to match endpoint to an open interface - cannot clear"); + return LIBUSB_ERROR_NOT_FOUND; + } + + return priv->usb_interface[current_interface].apib-> + clear_halt(priv->usb_interface[current_interface].sub_api, dev_handle, endpoint); +} + +static int composite_abort_control(int sub_api, struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + + return priv->usb_interface[transfer_priv->interface_number].apib-> + abort_control(priv->usb_interface[transfer_priv->interface_number].sub_api, itransfer); +} + +static int composite_abort_transfers(int sub_api, struct usbi_transfer *itransfer) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + + return priv->usb_interface[transfer_priv->interface_number].apib-> + abort_transfers(priv->usb_interface[transfer_priv->interface_number].sub_api, itransfer); +} + +static int composite_reset_device(int sub_api, struct libusb_device_handle *dev_handle) +{ + struct windows_device_priv *priv = _device_priv(dev_handle->dev); + int r; + uint8_t i; + bool available[SUB_API_MAX]; + + for (i = 0; i < SUB_API_MAX; i++) + available[i] = false; + + for (i = 0; i < USB_MAXINTERFACES; i++) { + if ((priv->usb_interface[i].apib->id == USB_API_WINUSBX) + && (priv->usb_interface[i].sub_api != SUB_API_NOTSET)) + available[priv->usb_interface[i].sub_api] = true; + } + + for (i = 0; i < SUB_API_MAX; i++) { + if (available[i]) { + r = usb_api_backend[USB_API_WINUSBX].reset_device(i, dev_handle); + if (r != LIBUSB_SUCCESS) + return r; + } + } + + return LIBUSB_SUCCESS; +} + +static int composite_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size) +{ + struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); + struct windows_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer); + struct windows_device_priv *priv = _device_priv(transfer->dev_handle->dev); + + return priv->usb_interface[transfer_priv->interface_number].apib-> + copy_transfer_data(priv->usb_interface[transfer_priv->interface_number].sub_api, itransfer, io_size); +} + +#endif /* !USE_USBDK */ diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_winusb.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_winusb.h new file mode 100644 index 000000000..b7b9cd919 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/os/windows_winusb.h @@ -0,0 +1,937 @@ +/* + * Windows backend for libusb 1.0 + * Copyright © 2009-2012 Pete Batard + * With contributions from Michael Plante, Orin Eman et al. + * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer + * Major code testing contribution by Xiaofan Chen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#pragma once + +#include "windows_common.h" +#include "windows_nt_common.h" + +#if defined(_MSC_VER) +// disable /W4 MSVC warnings that are benign +#pragma warning(disable:4100) // unreferenced formal parameter +#pragma warning(disable:4127) // conditional expression is constant +#pragma warning(disable:4201) // nameless struct/union +#pragma warning(disable:4214) // bit field types other than int +#pragma warning(disable:4996) // deprecated API calls +#pragma warning(disable:28159) // more deprecated API calls +#endif + +// Missing from MSVC6 setupapi.h +#if !defined(SPDRP_ADDRESS) +#define SPDRP_ADDRESS 28 +#endif +#if !defined(SPDRP_INSTALL_STATE) +#define SPDRP_INSTALL_STATE 34 +#endif + +#define MAX_CTRL_BUFFER_LENGTH 4096 +#define MAX_USB_DEVICES 256 +#define MAX_USB_STRING_LENGTH 128 +#define MAX_HID_REPORT_SIZE 1024 +#define MAX_HID_DESCRIPTOR_SIZE 256 +#define MAX_GUID_STRING_LENGTH 40 +#define MAX_PATH_LENGTH 128 +#define MAX_KEY_LENGTH 256 +#define LIST_SEPARATOR ';' + +// Handle code for HID interface that have been claimed ("dibs") +#define INTERFACE_CLAIMED ((HANDLE)(intptr_t)0xD1B5) +// Additional return code for HID operations that completed synchronously +#define LIBUSB_COMPLETED (LIBUSB_SUCCESS + 1) + +// http://msdn.microsoft.com/en-us/library/ff545978.aspx +// http://msdn.microsoft.com/en-us/library/ff545972.aspx +// http://msdn.microsoft.com/en-us/library/ff545982.aspx +#if !defined(GUID_DEVINTERFACE_USB_HOST_CONTROLLER) +const GUID GUID_DEVINTERFACE_USB_HOST_CONTROLLER = { 0x3ABF6F2D, 0x71C4, 0x462A, {0x8A, 0x92, 0x1E, 0x68, 0x61, 0xE6, 0xAF, 0x27} }; +#endif +#if !defined(GUID_DEVINTERFACE_USB_DEVICE) +const GUID GUID_DEVINTERFACE_USB_DEVICE = { 0xA5DCBF10, 0x6530, 0x11D2, {0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED} }; +#endif +#if !defined(GUID_DEVINTERFACE_USB_HUB) +const GUID GUID_DEVINTERFACE_USB_HUB = { 0xF18A0E88, 0xC30C, 0x11D0, {0x88, 0x15, 0x00, 0xA0, 0xC9, 0x06, 0xBE, 0xD8} }; +#endif +#if !defined(GUID_DEVINTERFACE_LIBUSB0_FILTER) +const GUID GUID_DEVINTERFACE_LIBUSB0_FILTER = { 0xF9F3FF14, 0xAE21, 0x48A0, {0x8A, 0x25, 0x80, 0x11, 0xA7, 0xA9, 0x31, 0xD9} }; +#endif + + +/* + * Multiple USB API backend support + */ +#define USB_API_UNSUPPORTED 0 +#define USB_API_HUB 1 +#define USB_API_COMPOSITE 2 +#define USB_API_WINUSBX 3 +#define USB_API_HID 4 +#define USB_API_MAX 5 +// The following is used to indicate if the HID or composite extra props have already been set. +#define USB_API_SET (1 << USB_API_MAX) + +// Sub-APIs for WinUSB-like driver APIs (WinUSB, libusbK, libusb-win32 through the libusbK DLL) +// Must have the same values as the KUSB_DRVID enum from libusbk.h +#define SUB_API_NOTSET -1 +#define SUB_API_LIBUSBK 0 +#define SUB_API_LIBUSB0 1 +#define SUB_API_WINUSB 2 +#define SUB_API_MAX 3 + +#define WINUSBX_DRV_NAMES {"libusbK", "libusb0", "WinUSB"} + +struct windows_usb_api_backend { + const uint8_t id; + const char *designation; + const char **driver_name_list; // Driver name, without .sys, e.g. "usbccgp" + const uint8_t nb_driver_names; + int (*init)(int sub_api, struct libusb_context *ctx); + int (*exit)(int sub_api); + int (*open)(int sub_api, struct libusb_device_handle *dev_handle); + void (*close)(int sub_api, struct libusb_device_handle *dev_handle); + int (*configure_endpoints)(int sub_api, struct libusb_device_handle *dev_handle, int iface); + int (*claim_interface)(int sub_api, struct libusb_device_handle *dev_handle, int iface); + int (*set_interface_altsetting)(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting); + int (*release_interface)(int sub_api, struct libusb_device_handle *dev_handle, int iface); + int (*clear_halt)(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint); + int (*reset_device)(int sub_api, struct libusb_device_handle *dev_handle); + int (*submit_bulk_transfer)(int sub_api, struct usbi_transfer *itransfer); + int (*submit_iso_transfer)(int sub_api, struct usbi_transfer *itransfer); + int (*submit_control_transfer)(int sub_api, struct usbi_transfer *itransfer); + int (*abort_control)(int sub_api, struct usbi_transfer *itransfer); + int (*abort_transfers)(int sub_api, struct usbi_transfer *itransfer); + int (*copy_transfer_data)(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size); +}; + +extern const struct windows_usb_api_backend usb_api_backend[USB_API_MAX]; + +#define PRINT_UNSUPPORTED_API(fname) \ + usbi_dbg("unsupported API call for '" \ + #fname "' (unrecognized device driver)"); \ + return LIBUSB_ERROR_NOT_SUPPORTED; + +/* + * private structures definition + * with inline pseudo constructors/destructors + */ + +// TODO (v2+): move hid desc to libusb.h? +struct libusb_hid_descriptor { + uint8_t bLength; + uint8_t bDescriptorType; + uint16_t bcdHID; + uint8_t bCountryCode; + uint8_t bNumDescriptors; + uint8_t bClassDescriptorType; + uint16_t wClassDescriptorLength; +}; + +#define LIBUSB_DT_HID_SIZE 9 +#define HID_MAX_CONFIG_DESC_SIZE (LIBUSB_DT_CONFIG_SIZE + LIBUSB_DT_INTERFACE_SIZE \ + + LIBUSB_DT_HID_SIZE + 2 * LIBUSB_DT_ENDPOINT_SIZE) +#define HID_MAX_REPORT_SIZE 1024 +#define HID_IN_EP 0x81 +#define HID_OUT_EP 0x02 +#define LIBUSB_REQ_RECIPIENT(request_type) ((request_type) & 0x1F) +#define LIBUSB_REQ_TYPE(request_type) ((request_type) & (0x03 << 5)) +#define LIBUSB_REQ_IN(request_type) ((request_type) & LIBUSB_ENDPOINT_IN) +#define LIBUSB_REQ_OUT(request_type) (!LIBUSB_REQ_IN(request_type)) + +// The following are used for HID reports IOCTLs +#define HID_CTL_CODE(id) \ + CTL_CODE (FILE_DEVICE_KEYBOARD, (id), METHOD_NEITHER, FILE_ANY_ACCESS) +#define HID_BUFFER_CTL_CODE(id) \ + CTL_CODE (FILE_DEVICE_KEYBOARD, (id), METHOD_BUFFERED, FILE_ANY_ACCESS) +#define HID_IN_CTL_CODE(id) \ + CTL_CODE (FILE_DEVICE_KEYBOARD, (id), METHOD_IN_DIRECT, FILE_ANY_ACCESS) +#define HID_OUT_CTL_CODE(id) \ + CTL_CODE (FILE_DEVICE_KEYBOARD, (id), METHOD_OUT_DIRECT, FILE_ANY_ACCESS) + +#define IOCTL_HID_GET_FEATURE HID_OUT_CTL_CODE(100) +#define IOCTL_HID_GET_INPUT_REPORT HID_OUT_CTL_CODE(104) +#define IOCTL_HID_SET_FEATURE HID_IN_CTL_CODE(100) +#define IOCTL_HID_SET_OUTPUT_REPORT HID_IN_CTL_CODE(101) + +enum libusb_hid_request_type { + HID_REQ_GET_REPORT = 0x01, + HID_REQ_GET_IDLE = 0x02, + HID_REQ_GET_PROTOCOL = 0x03, + HID_REQ_SET_REPORT = 0x09, + HID_REQ_SET_IDLE = 0x0A, + HID_REQ_SET_PROTOCOL = 0x0B +}; + +enum libusb_hid_report_type { + HID_REPORT_TYPE_INPUT = 0x01, + HID_REPORT_TYPE_OUTPUT = 0x02, + HID_REPORT_TYPE_FEATURE = 0x03 +}; + +struct hid_device_priv { + uint16_t vid; + uint16_t pid; + uint8_t config; + uint8_t nb_interfaces; + bool uses_report_ids[3]; // input, ouptput, feature + uint16_t input_report_size; + uint16_t output_report_size; + uint16_t feature_report_size; + WCHAR string[3][MAX_USB_STRING_LENGTH]; + uint8_t string_index[3]; // man, prod, ser +}; + +struct windows_device_priv { + uint8_t depth; // distance to HCD + uint8_t port; // port number on the hub + uint8_t active_config; + struct windows_usb_api_backend const *apib; + char *path; // device interface path + int sub_api; // for WinUSB-like APIs + struct { + char *path; // each interface needs a device interface path, + struct windows_usb_api_backend const *apib; // an API backend (multiple drivers support), + int sub_api; + int8_t nb_endpoints; // and a set of endpoint addresses (USB_MAXENDPOINTS) + uint8_t *endpoint; + bool restricted_functionality; // indicates if the interface functionality is restricted + // by Windows (eg. HID keyboards or mice cannot do R/W) + } usb_interface[USB_MAXINTERFACES]; + struct hid_device_priv *hid; + USB_DEVICE_DESCRIPTOR dev_descriptor; + unsigned char **config_descriptor; // list of pointers to the cached config descriptors +}; + +static inline struct windows_device_priv *_device_priv(struct libusb_device *dev) +{ + return (struct windows_device_priv *)dev->os_priv; +} + +static inline struct windows_device_priv *windows_device_priv_init(struct libusb_device *dev) +{ + struct windows_device_priv *p = _device_priv(dev); + int i; + + p->apib = &usb_api_backend[USB_API_UNSUPPORTED]; + p->sub_api = SUB_API_NOTSET; + for (i = 0; i < USB_MAXINTERFACES; i++) { + p->usb_interface[i].apib = &usb_api_backend[USB_API_UNSUPPORTED]; + p->usb_interface[i].sub_api = SUB_API_NOTSET; + } + + return p; +} + +static inline void windows_device_priv_release(struct libusb_device *dev) +{ + struct windows_device_priv *p = _device_priv(dev); + int i; + + free(p->path); + if ((dev->num_configurations > 0) && (p->config_descriptor != NULL)) { + for (i = 0; i < dev->num_configurations; i++) + free(p->config_descriptor[i]); + } + free(p->config_descriptor); + free(p->hid); + for (i = 0; i < USB_MAXINTERFACES; i++) { + free(p->usb_interface[i].path); + free(p->usb_interface[i].endpoint); + } +} + +struct interface_handle_t { + HANDLE dev_handle; // WinUSB needs an extra handle for the file + HANDLE api_handle; // used by the API to communicate with the device +}; + +struct windows_device_handle_priv { + int active_interface; + struct interface_handle_t interface_handle[USB_MAXINTERFACES]; + int autoclaim_count[USB_MAXINTERFACES]; // For auto-release +}; + +static inline struct windows_device_handle_priv *_device_handle_priv( + struct libusb_device_handle *handle) +{ + return (struct windows_device_handle_priv *)handle->os_priv; +} + +// used for async polling functions +struct windows_transfer_priv { + struct winfd pollable_fd; + uint8_t interface_number; + uint8_t *hid_buffer; // 1 byte extended data buffer, required for HID + uint8_t *hid_dest; // transfer buffer destination, required for HID + size_t hid_expected_size; +}; + +// used to match a device driver (including filter drivers) against a supported API +struct driver_lookup { + char list[MAX_KEY_LENGTH + 1]; // REG_MULTI_SZ list of services (driver) names + const DWORD reg_prop; // SPDRP registry key to use to retrieve list + const char* designation; // internal designation (for debug output) +}; + +/* OLE32 dependency */ +DLL_DECLARE_HANDLE(OLE32); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, HRESULT, p, CLSIDFromString, (LPCOLESTR, LPCLSID)); + +/* Kernel32 dependencies */ +DLL_DECLARE_HANDLE(Kernel32); +/* This call is only available from XP SP2 */ +DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, IsWow64Process, (HANDLE, PBOOL)); + +/* SetupAPI dependencies */ +DLL_DECLARE_HANDLE(SetupAPI); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, HDEVINFO, p, SetupDiGetClassDevsA, (const GUID*, PCSTR, HWND, DWORD)); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, SetupDiEnumDeviceInfo, (HDEVINFO, DWORD, PSP_DEVINFO_DATA)); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, SetupDiEnumDeviceInterfaces, (HDEVINFO, PSP_DEVINFO_DATA, + const GUID*, DWORD, PSP_DEVICE_INTERFACE_DATA)); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, SetupDiGetDeviceInterfaceDetailA, (HDEVINFO, PSP_DEVICE_INTERFACE_DATA, + PSP_DEVICE_INTERFACE_DETAIL_DATA_A, DWORD, PDWORD, PSP_DEVINFO_DATA)); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, SetupDiDestroyDeviceInfoList, (HDEVINFO)); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, HKEY, p, SetupDiOpenDevRegKey, (HDEVINFO, PSP_DEVINFO_DATA, DWORD, DWORD, DWORD, REGSAM)); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, SetupDiGetDeviceRegistryPropertyA, (HDEVINFO, + PSP_DEVINFO_DATA, DWORD, PDWORD, PBYTE, DWORD, PDWORD)); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, HKEY, p, SetupDiOpenDeviceInterfaceRegKey, (HDEVINFO, PSP_DEVICE_INTERFACE_DATA, DWORD, DWORD)); + +/* AdvAPI32 dependencies */ +DLL_DECLARE_HANDLE(AdvAPI32); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, LONG, p, RegQueryValueExW, (HKEY, LPCWSTR, LPDWORD, LPDWORD, LPBYTE, LPDWORD)); +DLL_DECLARE_FUNC_PREFIXED(WINAPI, LONG, p, RegCloseKey, (HKEY)); + +/* + * Windows DDK API definitions. Most of it copied from MinGW's includes + */ +typedef DWORD DEVNODE, DEVINST; +typedef DEVNODE *PDEVNODE, *PDEVINST; +typedef DWORD RETURN_TYPE; +typedef RETURN_TYPE CONFIGRET; + +#define CR_SUCCESS 0x00000000 +#define CR_NO_SUCH_DEVNODE 0x0000000D + +#define USB_DEVICE_DESCRIPTOR_TYPE LIBUSB_DT_DEVICE +#define USB_CONFIGURATION_DESCRIPTOR_TYPE LIBUSB_DT_CONFIG +#define USB_STRING_DESCRIPTOR_TYPE LIBUSB_DT_STRING +#define USB_INTERFACE_DESCRIPTOR_TYPE LIBUSB_DT_INTERFACE +#define USB_ENDPOINT_DESCRIPTOR_TYPE LIBUSB_DT_ENDPOINT + +#define USB_REQUEST_GET_STATUS LIBUSB_REQUEST_GET_STATUS +#define USB_REQUEST_CLEAR_FEATURE LIBUSB_REQUEST_CLEAR_FEATURE +#define USB_REQUEST_SET_FEATURE LIBUSB_REQUEST_SET_FEATURE +#define USB_REQUEST_SET_ADDRESS LIBUSB_REQUEST_SET_ADDRESS +#define USB_REQUEST_GET_DESCRIPTOR LIBUSB_REQUEST_GET_DESCRIPTOR +#define USB_REQUEST_SET_DESCRIPTOR LIBUSB_REQUEST_SET_DESCRIPTOR +#define USB_REQUEST_GET_CONFIGURATION LIBUSB_REQUEST_GET_CONFIGURATION +#define USB_REQUEST_SET_CONFIGURATION LIBUSB_REQUEST_SET_CONFIGURATION +#define USB_REQUEST_GET_INTERFACE LIBUSB_REQUEST_GET_INTERFACE +#define USB_REQUEST_SET_INTERFACE LIBUSB_REQUEST_SET_INTERFACE +#define USB_REQUEST_SYNC_FRAME LIBUSB_REQUEST_SYNCH_FRAME + +#define USB_GET_NODE_INFORMATION 258 +#define USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION 260 +#define USB_GET_NODE_CONNECTION_NAME 261 +#define USB_GET_HUB_CAPABILITIES 271 +#if !defined(USB_GET_NODE_CONNECTION_INFORMATION_EX) +#define USB_GET_NODE_CONNECTION_INFORMATION_EX 274 +#endif +#if !defined(USB_GET_HUB_CAPABILITIES_EX) +#define USB_GET_HUB_CAPABILITIES_EX 276 +#endif +#if !defined(USB_GET_NODE_CONNECTION_INFORMATION_EX_V2) +#define USB_GET_NODE_CONNECTION_INFORMATION_EX_V2 279 +#endif + +#ifndef METHOD_BUFFERED +#define METHOD_BUFFERED 0 +#endif +#ifndef FILE_ANY_ACCESS +#define FILE_ANY_ACCESS 0x00000000 +#endif +#ifndef FILE_DEVICE_UNKNOWN +#define FILE_DEVICE_UNKNOWN 0x00000022 +#endif +#ifndef FILE_DEVICE_USB +#define FILE_DEVICE_USB FILE_DEVICE_UNKNOWN +#endif + +#ifndef CTL_CODE +#define CTL_CODE(DeviceType, Function, Method, Access) \ + (((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2) | (Method)) +#endif + +typedef enum USB_CONNECTION_STATUS { + NoDeviceConnected, + DeviceConnected, + DeviceFailedEnumeration, + DeviceGeneralFailure, + DeviceCausedOvercurrent, + DeviceNotEnoughPower, + DeviceNotEnoughBandwidth, + DeviceHubNestedTooDeeply, + DeviceInLegacyHub +} USB_CONNECTION_STATUS, *PUSB_CONNECTION_STATUS; + +typedef enum USB_HUB_NODE { + UsbHub, + UsbMIParent +} USB_HUB_NODE; + +/* Cfgmgr32.dll interface */ +DLL_DECLARE_HANDLE(Cfgmgr32); +DLL_DECLARE_FUNC(WINAPI, CONFIGRET, CM_Get_Parent, (PDEVINST, DEVINST, ULONG)); +DLL_DECLARE_FUNC(WINAPI, CONFIGRET, CM_Get_Child, (PDEVINST, DEVINST, ULONG)); +DLL_DECLARE_FUNC(WINAPI, CONFIGRET, CM_Get_Sibling, (PDEVINST, DEVINST, ULONG)); +DLL_DECLARE_FUNC(WINAPI, CONFIGRET, CM_Get_Device_IDA, (DEVINST, PCHAR, ULONG, ULONG)); + +#define IOCTL_USB_GET_HUB_CAPABILITIES_EX \ + CTL_CODE( FILE_DEVICE_USB, USB_GET_HUB_CAPABILITIES_EX, METHOD_BUFFERED, FILE_ANY_ACCESS) + +#define IOCTL_USB_GET_HUB_CAPABILITIES \ + CTL_CODE(FILE_DEVICE_USB, USB_GET_HUB_CAPABILITIES, METHOD_BUFFERED, FILE_ANY_ACCESS) + +#define IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION \ + CTL_CODE(FILE_DEVICE_USB, USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, METHOD_BUFFERED, FILE_ANY_ACCESS) + +#define IOCTL_USB_GET_ROOT_HUB_NAME \ + CTL_CODE(FILE_DEVICE_USB, HCD_GET_ROOT_HUB_NAME, METHOD_BUFFERED, FILE_ANY_ACCESS) + +#define IOCTL_USB_GET_NODE_INFORMATION \ + CTL_CODE(FILE_DEVICE_USB, USB_GET_NODE_INFORMATION, METHOD_BUFFERED, FILE_ANY_ACCESS) + +#define IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX \ + CTL_CODE(FILE_DEVICE_USB, USB_GET_NODE_CONNECTION_INFORMATION_EX, METHOD_BUFFERED, FILE_ANY_ACCESS) + +#define IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX_V2 \ + CTL_CODE(FILE_DEVICE_USB, USB_GET_NODE_CONNECTION_INFORMATION_EX_V2, METHOD_BUFFERED, FILE_ANY_ACCESS) + +#define IOCTL_USB_GET_NODE_CONNECTION_ATTRIBUTES \ + CTL_CODE(FILE_DEVICE_USB, USB_GET_NODE_CONNECTION_ATTRIBUTES, METHOD_BUFFERED, FILE_ANY_ACCESS) + +#define IOCTL_USB_GET_NODE_CONNECTION_NAME \ + CTL_CODE(FILE_DEVICE_USB, USB_GET_NODE_CONNECTION_NAME, METHOD_BUFFERED, FILE_ANY_ACCESS) + +// Most of the structures below need to be packed +#pragma pack(push, 1) + +typedef struct USB_INTERFACE_DESCRIPTOR { + UCHAR bLength; + UCHAR bDescriptorType; + UCHAR bInterfaceNumber; + UCHAR bAlternateSetting; + UCHAR bNumEndpoints; + UCHAR bInterfaceClass; + UCHAR bInterfaceSubClass; + UCHAR bInterfaceProtocol; + UCHAR iInterface; +} USB_INTERFACE_DESCRIPTOR, *PUSB_INTERFACE_DESCRIPTOR; + +typedef struct USB_CONFIGURATION_DESCRIPTOR_SHORT { + struct { + ULONG ConnectionIndex; + struct { + UCHAR bmRequest; + UCHAR bRequest; + USHORT wValue; + USHORT wIndex; + USHORT wLength; + } SetupPacket; + } req; + USB_CONFIGURATION_DESCRIPTOR data; +} USB_CONFIGURATION_DESCRIPTOR_SHORT; + +typedef struct USB_ENDPOINT_DESCRIPTOR { + UCHAR bLength; + UCHAR bDescriptorType; + UCHAR bEndpointAddress; + UCHAR bmAttributes; + USHORT wMaxPacketSize; + UCHAR bInterval; +} USB_ENDPOINT_DESCRIPTOR, *PUSB_ENDPOINT_DESCRIPTOR; + +typedef struct USB_DESCRIPTOR_REQUEST { + ULONG ConnectionIndex; + struct { + UCHAR bmRequest; + UCHAR bRequest; + USHORT wValue; + USHORT wIndex; + USHORT wLength; + } SetupPacket; +// UCHAR Data[0]; +} USB_DESCRIPTOR_REQUEST, *PUSB_DESCRIPTOR_REQUEST; + +typedef struct USB_HUB_DESCRIPTOR { + UCHAR bDescriptorLength; + UCHAR bDescriptorType; + UCHAR bNumberOfPorts; + USHORT wHubCharacteristics; + UCHAR bPowerOnToPowerGood; + UCHAR bHubControlCurrent; + UCHAR bRemoveAndPowerMask[64]; +} USB_HUB_DESCRIPTOR, *PUSB_HUB_DESCRIPTOR; + +typedef struct USB_ROOT_HUB_NAME { + ULONG ActualLength; + WCHAR RootHubName[1]; +} USB_ROOT_HUB_NAME, *PUSB_ROOT_HUB_NAME; + +typedef struct USB_ROOT_HUB_NAME_FIXED { + ULONG ActualLength; + WCHAR RootHubName[MAX_PATH_LENGTH]; +} USB_ROOT_HUB_NAME_FIXED; + +typedef struct USB_NODE_CONNECTION_NAME { + ULONG ConnectionIndex; + ULONG ActualLength; + WCHAR NodeName[1]; +} USB_NODE_CONNECTION_NAME, *PUSB_NODE_CONNECTION_NAME; + +typedef struct USB_NODE_CONNECTION_NAME_FIXED { + ULONG ConnectionIndex; + ULONG ActualLength; + WCHAR NodeName[MAX_PATH_LENGTH]; +} USB_NODE_CONNECTION_NAME_FIXED; + +typedef struct USB_HUB_NAME_FIXED { + union { + USB_ROOT_HUB_NAME_FIXED root; + USB_NODE_CONNECTION_NAME_FIXED node; + } u; +} USB_HUB_NAME_FIXED; + +typedef struct USB_HUB_INFORMATION { + USB_HUB_DESCRIPTOR HubDescriptor; + BOOLEAN HubIsBusPowered; +} USB_HUB_INFORMATION, *PUSB_HUB_INFORMATION; + +typedef struct USB_MI_PARENT_INFORMATION { + ULONG NumberOfInterfaces; +} USB_MI_PARENT_INFORMATION, *PUSB_MI_PARENT_INFORMATION; + +typedef struct USB_NODE_INFORMATION { + USB_HUB_NODE NodeType; + union { + USB_HUB_INFORMATION HubInformation; + USB_MI_PARENT_INFORMATION MiParentInformation; + } u; +} USB_NODE_INFORMATION, *PUSB_NODE_INFORMATION; + +typedef struct USB_PIPE_INFO { + USB_ENDPOINT_DESCRIPTOR EndpointDescriptor; + ULONG ScheduleOffset; +} USB_PIPE_INFO, *PUSB_PIPE_INFO; + +typedef struct USB_NODE_CONNECTION_INFORMATION_EX { + ULONG ConnectionIndex; + USB_DEVICE_DESCRIPTOR DeviceDescriptor; + UCHAR CurrentConfigurationValue; + UCHAR Speed; + BOOLEAN DeviceIsHub; + USHORT DeviceAddress; + ULONG NumberOfOpenPipes; + USB_CONNECTION_STATUS ConnectionStatus; +// USB_PIPE_INFO PipeList[0]; +} USB_NODE_CONNECTION_INFORMATION_EX, *PUSB_NODE_CONNECTION_INFORMATION_EX; + +typedef union _USB_PROTOCOLS { + ULONG ul; + struct { + ULONG Usb110:1; + ULONG Usb200:1; + ULONG Usb300:1; + ULONG ReservedMBZ:29; + }; +} USB_PROTOCOLS, *PUSB_PROTOCOLS; + +typedef union _USB_NODE_CONNECTION_INFORMATION_EX_V2_FLAGS { + ULONG ul; + struct { + ULONG DeviceIsOperatingAtSuperSpeedOrHigher:1; + ULONG DeviceIsSuperSpeedCapableOrHigher:1; + ULONG ReservedMBZ:30; + }; +} USB_NODE_CONNECTION_INFORMATION_EX_V2_FLAGS, *PUSB_NODE_CONNECTION_INFORMATION_EX_V2_FLAGS; + +typedef struct _USB_NODE_CONNECTION_INFORMATION_EX_V2 { + ULONG ConnectionIndex; + ULONG Length; + USB_PROTOCOLS SupportedUsbProtocols; + USB_NODE_CONNECTION_INFORMATION_EX_V2_FLAGS Flags; +} USB_NODE_CONNECTION_INFORMATION_EX_V2, *PUSB_NODE_CONNECTION_INFORMATION_EX_V2; + +typedef struct USB_HUB_CAP_FLAGS { + ULONG HubIsHighSpeedCapable:1; + ULONG HubIsHighSpeed:1; + ULONG HubIsMultiTtCapable:1; + ULONG HubIsMultiTt:1; + ULONG HubIsRoot:1; + ULONG HubIsArmedWakeOnConnect:1; + ULONG ReservedMBZ:26; +} USB_HUB_CAP_FLAGS, *PUSB_HUB_CAP_FLAGS; + +typedef struct USB_HUB_CAPABILITIES { + ULONG HubIs2xCapable:1; +} USB_HUB_CAPABILITIES, *PUSB_HUB_CAPABILITIES; + +typedef struct USB_HUB_CAPABILITIES_EX { + USB_HUB_CAP_FLAGS CapabilityFlags; +} USB_HUB_CAPABILITIES_EX, *PUSB_HUB_CAPABILITIES_EX; + +#pragma pack(pop) + +/* winusb.dll interface */ + +#define SHORT_PACKET_TERMINATE 0x01 +#define AUTO_CLEAR_STALL 0x02 +#define PIPE_TRANSFER_TIMEOUT 0x03 +#define IGNORE_SHORT_PACKETS 0x04 +#define ALLOW_PARTIAL_READS 0x05 +#define AUTO_FLUSH 0x06 +#define RAW_IO 0x07 +#define MAXIMUM_TRANSFER_SIZE 0x08 +#define AUTO_SUSPEND 0x81 +#define SUSPEND_DELAY 0x83 +#define DEVICE_SPEED 0x01 +#define LowSpeed 0x01 +#define FullSpeed 0x02 +#define HighSpeed 0x03 + +typedef enum USBD_PIPE_TYPE { + UsbdPipeTypeControl, + UsbdPipeTypeIsochronous, + UsbdPipeTypeBulk, + UsbdPipeTypeInterrupt +} USBD_PIPE_TYPE; + +typedef struct { + USBD_PIPE_TYPE PipeType; + UCHAR PipeId; + USHORT MaximumPacketSize; + UCHAR Interval; +} WINUSB_PIPE_INFORMATION, *PWINUSB_PIPE_INFORMATION; + +#pragma pack(1) +typedef struct { + UCHAR request_type; + UCHAR request; + USHORT value; + USHORT index; + USHORT length; +} WINUSB_SETUP_PACKET, *PWINUSB_SETUP_PACKET; +#pragma pack() + +typedef void *WINUSB_INTERFACE_HANDLE, *PWINUSB_INTERFACE_HANDLE; + +typedef BOOL (WINAPI *WinUsb_AbortPipe_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR PipeID +); +typedef BOOL (WINAPI *WinUsb_ControlTransfer_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + WINUSB_SETUP_PACKET SetupPacket, + PUCHAR Buffer, + ULONG BufferLength, + PULONG LengthTransferred, + LPOVERLAPPED Overlapped +); +typedef BOOL (WINAPI *WinUsb_FlushPipe_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR PipeID +); +typedef BOOL (WINAPI *WinUsb_Free_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle +); +typedef BOOL (WINAPI *WinUsb_GetAssociatedInterface_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR AssociatedInterfaceIndex, + PWINUSB_INTERFACE_HANDLE AssociatedInterfaceHandle +); +typedef BOOL (WINAPI *WinUsb_GetCurrentAlternateSetting_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + PUCHAR AlternateSetting +); +typedef BOOL (WINAPI *WinUsb_GetDescriptor_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR DescriptorType, + UCHAR Index, + USHORT LanguageID, + PUCHAR Buffer, + ULONG BufferLength, + PULONG LengthTransferred +); +typedef BOOL (WINAPI *WinUsb_GetOverlappedResult_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + LPOVERLAPPED lpOverlapped, + LPDWORD lpNumberOfBytesTransferred, + BOOL bWait +); +typedef BOOL (WINAPI *WinUsb_GetPipePolicy_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR PipeID, + ULONG PolicyType, + PULONG ValueLength, + PVOID Value +); +typedef BOOL (WINAPI *WinUsb_GetPowerPolicy_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + ULONG PolicyType, + PULONG ValueLength, + PVOID Value +); +typedef BOOL (WINAPI *WinUsb_Initialize_t)( + HANDLE DeviceHandle, + PWINUSB_INTERFACE_HANDLE InterfaceHandle +); +typedef BOOL (WINAPI *WinUsb_QueryDeviceInformation_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + ULONG InformationType, + PULONG BufferLength, + PVOID Buffer +); +typedef BOOL (WINAPI *WinUsb_QueryInterfaceSettings_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR AlternateSettingNumber, + PUSB_INTERFACE_DESCRIPTOR UsbAltInterfaceDescriptor +); +typedef BOOL (WINAPI *WinUsb_QueryPipe_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR AlternateInterfaceNumber, + UCHAR PipeIndex, + PWINUSB_PIPE_INFORMATION PipeInformation +); +typedef BOOL (WINAPI *WinUsb_ReadPipe_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR PipeID, + PUCHAR Buffer, + ULONG BufferLength, + PULONG LengthTransferred, + LPOVERLAPPED Overlapped +); +typedef BOOL (WINAPI *WinUsb_ResetPipe_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR PipeID +); +typedef BOOL (WINAPI *WinUsb_SetCurrentAlternateSetting_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR AlternateSetting +); +typedef BOOL (WINAPI *WinUsb_SetPipePolicy_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR PipeID, + ULONG PolicyType, + ULONG ValueLength, + PVOID Value +); +typedef BOOL (WINAPI *WinUsb_SetPowerPolicy_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + ULONG PolicyType, + ULONG ValueLength, + PVOID Value +); +typedef BOOL (WINAPI *WinUsb_WritePipe_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle, + UCHAR PipeID, + PUCHAR Buffer, + ULONG BufferLength, + PULONG LengthTransferred, + LPOVERLAPPED Overlapped +); +typedef BOOL (WINAPI *WinUsb_ResetDevice_t)( + WINUSB_INTERFACE_HANDLE InterfaceHandle +); + +/* /!\ These must match the ones from the official libusbk.h */ +typedef enum _KUSB_FNID { + KUSB_FNID_Init, + KUSB_FNID_Free, + KUSB_FNID_ClaimInterface, + KUSB_FNID_ReleaseInterface, + KUSB_FNID_SetAltInterface, + KUSB_FNID_GetAltInterface, + KUSB_FNID_GetDescriptor, + KUSB_FNID_ControlTransfer, + KUSB_FNID_SetPowerPolicy, + KUSB_FNID_GetPowerPolicy, + KUSB_FNID_SetConfiguration, + KUSB_FNID_GetConfiguration, + KUSB_FNID_ResetDevice, + KUSB_FNID_Initialize, + KUSB_FNID_SelectInterface, + KUSB_FNID_GetAssociatedInterface, + KUSB_FNID_Clone, + KUSB_FNID_QueryInterfaceSettings, + KUSB_FNID_QueryDeviceInformation, + KUSB_FNID_SetCurrentAlternateSetting, + KUSB_FNID_GetCurrentAlternateSetting, + KUSB_FNID_QueryPipe, + KUSB_FNID_SetPipePolicy, + KUSB_FNID_GetPipePolicy, + KUSB_FNID_ReadPipe, + KUSB_FNID_WritePipe, + KUSB_FNID_ResetPipe, + KUSB_FNID_AbortPipe, + KUSB_FNID_FlushPipe, + KUSB_FNID_IsoReadPipe, + KUSB_FNID_IsoWritePipe, + KUSB_FNID_GetCurrentFrameNumber, + KUSB_FNID_GetOverlappedResult, + KUSB_FNID_GetProperty, + KUSB_FNID_COUNT, +} KUSB_FNID; + +typedef struct _KLIB_VERSION { + INT Major; + INT Minor; + INT Micro; + INT Nano; +} KLIB_VERSION; +typedef KLIB_VERSION* PKLIB_VERSION; + +typedef BOOL (WINAPI *LibK_GetProcAddress_t)( + PVOID *ProcAddress, + ULONG DriverID, + ULONG FunctionID +); + +typedef VOID (WINAPI *LibK_GetVersion_t)( + PKLIB_VERSION Version +); + +struct winusb_interface { + bool initialized; + WinUsb_AbortPipe_t AbortPipe; + WinUsb_ControlTransfer_t ControlTransfer; + WinUsb_FlushPipe_t FlushPipe; + WinUsb_Free_t Free; + WinUsb_GetAssociatedInterface_t GetAssociatedInterface; + WinUsb_GetCurrentAlternateSetting_t GetCurrentAlternateSetting; + WinUsb_GetDescriptor_t GetDescriptor; + WinUsb_GetOverlappedResult_t GetOverlappedResult; + WinUsb_GetPipePolicy_t GetPipePolicy; + WinUsb_GetPowerPolicy_t GetPowerPolicy; + WinUsb_Initialize_t Initialize; + WinUsb_QueryDeviceInformation_t QueryDeviceInformation; + WinUsb_QueryInterfaceSettings_t QueryInterfaceSettings; + WinUsb_QueryPipe_t QueryPipe; + WinUsb_ReadPipe_t ReadPipe; + WinUsb_ResetPipe_t ResetPipe; + WinUsb_SetCurrentAlternateSetting_t SetCurrentAlternateSetting; + WinUsb_SetPipePolicy_t SetPipePolicy; + WinUsb_SetPowerPolicy_t SetPowerPolicy; + WinUsb_WritePipe_t WritePipe; + WinUsb_ResetDevice_t ResetDevice; +}; + +/* hid.dll interface */ + +#define HIDP_STATUS_SUCCESS 0x110000 +typedef void * PHIDP_PREPARSED_DATA; + +#pragma pack(1) +typedef struct { + ULONG Size; + USHORT VendorID; + USHORT ProductID; + USHORT VersionNumber; +} HIDD_ATTRIBUTES, *PHIDD_ATTRIBUTES; +#pragma pack() + +typedef USHORT USAGE; +typedef struct { + USAGE Usage; + USAGE UsagePage; + USHORT InputReportByteLength; + USHORT OutputReportByteLength; + USHORT FeatureReportByteLength; + USHORT Reserved[17]; + USHORT NumberLinkCollectionNodes; + USHORT NumberInputButtonCaps; + USHORT NumberInputValueCaps; + USHORT NumberInputDataIndices; + USHORT NumberOutputButtonCaps; + USHORT NumberOutputValueCaps; + USHORT NumberOutputDataIndices; + USHORT NumberFeatureButtonCaps; + USHORT NumberFeatureValueCaps; + USHORT NumberFeatureDataIndices; +} HIDP_CAPS, *PHIDP_CAPS; + +typedef enum _HIDP_REPORT_TYPE { + HidP_Input, + HidP_Output, + HidP_Feature +} HIDP_REPORT_TYPE; + +typedef struct _HIDP_VALUE_CAPS { + USAGE UsagePage; + UCHAR ReportID; + BOOLEAN IsAlias; + USHORT BitField; + USHORT LinkCollection; + USAGE LinkUsage; + USAGE LinkUsagePage; + BOOLEAN IsRange; + BOOLEAN IsStringRange; + BOOLEAN IsDesignatorRange; + BOOLEAN IsAbsolute; + BOOLEAN HasNull; + UCHAR Reserved; + USHORT BitSize; + USHORT ReportCount; + USHORT Reserved2[5]; + ULONG UnitsExp; + ULONG Units; + LONG LogicalMin, LogicalMax; + LONG PhysicalMin, PhysicalMax; + union { + struct { + USAGE UsageMin, UsageMax; + USHORT StringMin, StringMax; + USHORT DesignatorMin, DesignatorMax; + USHORT DataIndexMin, DataIndexMax; + } Range; + struct { + USAGE Usage, Reserved1; + USHORT StringIndex, Reserved2; + USHORT DesignatorIndex, Reserved3; + USHORT DataIndex, Reserved4; + } NotRange; + } u; +} HIDP_VALUE_CAPS, *PHIDP_VALUE_CAPS; + +DLL_DECLARE_HANDLE(hid); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_GetAttributes, (HANDLE, PHIDD_ATTRIBUTES)); +DLL_DECLARE_FUNC(WINAPI, VOID, HidD_GetHidGuid, (LPGUID)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_GetPreparsedData, (HANDLE, PHIDP_PREPARSED_DATA *)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_FreePreparsedData, (PHIDP_PREPARSED_DATA)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_GetManufacturerString, (HANDLE, PVOID, ULONG)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_GetProductString, (HANDLE, PVOID, ULONG)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_GetSerialNumberString, (HANDLE, PVOID, ULONG)); +DLL_DECLARE_FUNC(WINAPI, LONG, HidP_GetCaps, (PHIDP_PREPARSED_DATA, PHIDP_CAPS)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_SetNumInputBuffers, (HANDLE, ULONG)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_SetFeature, (HANDLE, PVOID, ULONG)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_GetFeature, (HANDLE, PVOID, ULONG)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_GetPhysicalDescriptor, (HANDLE, PVOID, ULONG)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_GetInputReport, (HANDLE, PVOID, ULONG)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_SetOutputReport, (HANDLE, PVOID, ULONG)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidD_FlushQueue, (HANDLE)); +DLL_DECLARE_FUNC(WINAPI, BOOL, HidP_GetValueCaps, (HIDP_REPORT_TYPE, PHIDP_VALUE_CAPS, PULONG, PHIDP_PREPARSED_DATA)); \ No newline at end of file diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/strerror.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/strerror.c new file mode 100644 index 000000000..d2be0e2a0 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/strerror.c @@ -0,0 +1,202 @@ +/* + * libusb strerror code + * Copyright © 2013 Hans de Goede + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#if defined(HAVE_STRINGS_H) +#include +#endif + +#include "libusbi.h" + +#if defined(_MSC_VER) +#define strncasecmp _strnicmp +#endif + +static size_t usbi_locale = 0; + +/** \ingroup libusb_misc + * How to add a new \ref libusb_strerror() translation: + *
    + *
  1. Download the latest \c strerror.c from:
    + * https://raw.github.com/libusb/libusb/master/libusb/sterror.c
    2. + *
  2. Open the file in an UTF-8 capable editor
    3. + *
  3. Add the 2 letter ISO 639-1 + * code for your locale at the end of \c usbi_locale_supported[]
    + * Eg. for Chinese, you would add "zh" so that: + * \code... usbi_locale_supported[] = { "en", "nl", "fr" };\endcode + * becomes: + * \code... usbi_locale_supported[] = { "en", "nl", "fr", "zh" };\endcode
    4. + *
  4. Copy the { / * English (en) * / ... } section and add it at the end of \c usbi_localized_errors
    + * Eg. for Chinese, the last section of \c usbi_localized_errors could look like: + * \code + * }, { / * Chinese (zh) * / + * "Success", + * ... + * "Other error", + * } + * };\endcode
    5. + *
  5. Translate each of the English messages from the section you copied into your language
    6. + *
  6. Save the file (in UTF-8 format) and send it to \c libusb-devel\@lists.sourceforge.net
    7. + *
+ */ + +static const char* usbi_locale_supported[] = { "en", "nl", "fr", "ru" }; +static const char* usbi_localized_errors[ARRAYSIZE(usbi_locale_supported)][LIBUSB_ERROR_COUNT] = { + { /* English (en) */ + "Success", + "Input/Output Error", + "Invalid parameter", + "Access denied (insufficient permissions)", + "No such device (it may have been disconnected)", + "Entity not found", + "Resource busy", + "Operation timed out", + "Overflow", + "Pipe error", + "System call interrupted (perhaps due to signal)", + "Insufficient memory", + "Operation not supported or unimplemented on this platform", + "Other error", + }, { /* Dutch (nl) */ + "Gelukt", + "Invoer-/uitvoerfout", + "Ongeldig argument", + "Toegang geweigerd (onvoldoende toegangsrechten)", + "Apparaat bestaat niet (verbinding met apparaat verbroken?)", + "Niet gevonden", + "Apparaat of hulpbron is bezig", + "Bewerking verlopen", + "Waarde is te groot", + "Gebroken pijp", + "Onderbroken systeemaanroep", + "Onvoldoende geheugen beschikbaar", + "Bewerking wordt niet ondersteund", + "Andere fout", + }, { /* French (fr) */ + "Succès", + "Erreur d'entrée/sortie", + "Paramètre invalide", + "Accès refusé (permissions insuffisantes)", + "Périphérique introuvable (peut-être déconnecté)", + "Elément introuvable", + "Resource déjà occupée", + "Operation expirée", + "Débordement", + "Erreur de pipe", + "Appel système abandonné (peut-être à cause d’un signal)", + "Mémoire insuffisante", + "Opération non supportée or non implémentée sur cette plateforme", + "Autre erreur", + }, { /* Russian (ru) */ + "Успех", + "Ошибка ввода/вывода", + "Неверный параметр", + "Доступ запрещён (не хватает прав)", + "Устройство отсутствует (возможно, оно было отсоединено)", + "Элемент не найден", + "Ресурс занят", + "Истекло время ожидания операции", + "Переполнение", + "Ошибка канала", + "Системный вызов прерван (возможно, сигналом)", + "Память исчерпана", + "Операция не поддерживается данной платформой", + "Неизвестная ошибка" + } +}; + +/** \ingroup libusb_misc + * Set the language, and only the language, not the encoding! used for + * translatable libusb messages. + * + * This takes a locale string in the default setlocale format: lang[-region] + * or lang[_country_region][.codeset]. Only the lang part of the string is + * used, and only 2 letter ISO 639-1 codes are accepted for it, such as "de". + * The optional region, country_region or codeset parts are ignored. This + * means that functions which return translatable strings will NOT honor the + * specified encoding. + * All strings returned are encoded as UTF-8 strings. + * + * If libusb_setlocale() is not called, all messages will be in English. + * + * The following functions return translatable strings: libusb_strerror(). + * Note that the libusb log messages controlled through libusb_set_debug() + * are not translated, they are always in English. + * + * For POSIX UTF-8 environments if you want libusb to follow the standard + * locale settings, call libusb_setlocale(setlocale(LC_MESSAGES, NULL)), + * after your app has done its locale setup. + * + * \param locale locale-string in the form of lang[_country_region][.codeset] + * or lang[-region], where lang is a 2 letter ISO 639-1 code + * \returns LIBUSB_SUCCESS on success + * \returns LIBUSB_ERROR_INVALID_PARAM if the locale doesn't meet the requirements + * \returns LIBUSB_ERROR_NOT_FOUND if the requested language is not supported + * \returns a LIBUSB_ERROR code on other errors + */ + +int API_EXPORTED libusb_setlocale(const char *locale) +{ + size_t i; + + if ( (locale == NULL) || (strlen(locale) < 2) + || ((strlen(locale) > 2) && (locale[2] != '-') && (locale[2] != '_') && (locale[2] != '.')) ) + return LIBUSB_ERROR_INVALID_PARAM; + + for (i=0; i= ARRAYSIZE(usbi_locale_supported)) { + return LIBUSB_ERROR_NOT_FOUND; + } + + usbi_locale = i; + + return LIBUSB_SUCCESS; +} + +/** \ingroup libusb_misc + * Returns a constant string with a short description of the given error code, + * this description is intended for displaying to the end user and will be in + * the language set by libusb_setlocale(). + * + * The returned string is encoded in UTF-8. + * + * The messages always start with a capital letter and end without any dot. + * The caller must not free() the returned string. + * + * \param errcode the error code whose description is desired + * \returns a short description of the error code in UTF-8 encoding + */ +DEFAULT_VISIBILITY const char* LIBUSB_CALL libusb_strerror(enum libusb_error errcode) +{ + int errcode_index = -errcode; + + if ((errcode_index < 0) || (errcode_index >= LIBUSB_ERROR_COUNT)) { + /* "Other Error", which should always be our last message, is returned */ + errcode_index = LIBUSB_ERROR_COUNT - 1; + } + + return usbi_localized_errors[usbi_locale][errcode_index]; +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/sync.c b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/sync.c new file mode 100644 index 000000000..a609f65f4 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/sync.c @@ -0,0 +1,327 @@ +/* + * Synchronous I/O functions for libusb + * Copyright © 2007-2008 Daniel Drake + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include + +#include "libusbi.h" + +/** + * @defgroup libusb_syncio Synchronous device I/O + * + * This page documents libusb's synchronous (blocking) API for USB device I/O. + * This interface is easy to use but has some limitations. More advanced users + * may wish to consider using the \ref libusb_asyncio "asynchronous I/O API" instead. + */ + +static void LIBUSB_CALL sync_transfer_cb(struct libusb_transfer *transfer) +{ + int *completed = transfer->user_data; + *completed = 1; + usbi_dbg("actual_length=%d", transfer->actual_length); + /* caller interprets result and frees transfer */ +} + +static void sync_transfer_wait_for_completion(struct libusb_transfer *transfer) +{ + int r, *completed = transfer->user_data; + struct libusb_context *ctx = HANDLE_CTX(transfer->dev_handle); + + while (!*completed) { + r = libusb_handle_events_completed(ctx, completed); + if (r < 0) { + if (r == LIBUSB_ERROR_INTERRUPTED) + continue; + usbi_err(ctx, "libusb_handle_events failed: %s, cancelling transfer and retrying", + libusb_error_name(r)); + libusb_cancel_transfer(transfer); + continue; + } + } +} + +/** \ingroup libusb_syncio + * Perform a USB control transfer. + * + * The direction of the transfer is inferred from the bmRequestType field of + * the setup packet. + * + * The wValue, wIndex and wLength fields values should be given in host-endian + * byte order. + * + * \param dev_handle a handle for the device to communicate with + * \param bmRequestType the request type field for the setup packet + * \param bRequest the request field for the setup packet + * \param wValue the value field for the setup packet + * \param wIndex the index field for the setup packet + * \param data a suitably-sized data buffer for either input or output + * (depending on direction bits within bmRequestType) + * \param wLength the length field for the setup packet. The data buffer should + * be at least this size. + * \param timeout timeout (in millseconds) that this function should wait + * before giving up due to no response being received. For an unlimited + * timeout, use value 0. + * \returns on success, the number of bytes actually transferred + * \returns LIBUSB_ERROR_TIMEOUT if the transfer timed out + * \returns LIBUSB_ERROR_PIPE if the control request was not supported by the + * device + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns LIBUSB_ERROR_BUSY if called from event handling context + * \returns LIBUSB_ERROR_INVALID_PARAM if the transfer size is larger than + * the operating system and/or hardware can support + * \returns another LIBUSB_ERROR code on other failures + */ +int API_EXPORTED libusb_control_transfer(libusb_device_handle *dev_handle, + uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, + unsigned char *data, uint16_t wLength, unsigned int timeout) +{ + struct libusb_transfer *transfer; + unsigned char *buffer; + int completed = 0; + int r; + + if (usbi_handling_events(HANDLE_CTX(dev_handle))) + return LIBUSB_ERROR_BUSY; + + transfer = libusb_alloc_transfer(0); + if (!transfer) + return LIBUSB_ERROR_NO_MEM; + + buffer = (unsigned char*) malloc(LIBUSB_CONTROL_SETUP_SIZE + wLength); + if (!buffer) { + libusb_free_transfer(transfer); + return LIBUSB_ERROR_NO_MEM; + } + + libusb_fill_control_setup(buffer, bmRequestType, bRequest, wValue, wIndex, + wLength); + if ((bmRequestType & LIBUSB_ENDPOINT_DIR_MASK) == LIBUSB_ENDPOINT_OUT) + memcpy(buffer + LIBUSB_CONTROL_SETUP_SIZE, data, wLength); + + libusb_fill_control_transfer(transfer, dev_handle, buffer, + sync_transfer_cb, &completed, timeout); + transfer->flags = LIBUSB_TRANSFER_FREE_BUFFER; + r = libusb_submit_transfer(transfer); + if (r < 0) { + libusb_free_transfer(transfer); + return r; + } + + sync_transfer_wait_for_completion(transfer); + + if ((bmRequestType & LIBUSB_ENDPOINT_DIR_MASK) == LIBUSB_ENDPOINT_IN) + memcpy(data, libusb_control_transfer_get_data(transfer), + transfer->actual_length); + + switch (transfer->status) { + case LIBUSB_TRANSFER_COMPLETED: + r = transfer->actual_length; + break; + case LIBUSB_TRANSFER_TIMED_OUT: + r = LIBUSB_ERROR_TIMEOUT; + break; + case LIBUSB_TRANSFER_STALL: + r = LIBUSB_ERROR_PIPE; + break; + case LIBUSB_TRANSFER_NO_DEVICE: + r = LIBUSB_ERROR_NO_DEVICE; + break; + case LIBUSB_TRANSFER_OVERFLOW: + r = LIBUSB_ERROR_OVERFLOW; + break; + case LIBUSB_TRANSFER_ERROR: + case LIBUSB_TRANSFER_CANCELLED: + r = LIBUSB_ERROR_IO; + break; + default: + usbi_warn(HANDLE_CTX(dev_handle), + "unrecognised status code %d", transfer->status); + r = LIBUSB_ERROR_OTHER; + } + + libusb_free_transfer(transfer); + return r; +} + +static int do_sync_bulk_transfer(struct libusb_device_handle *dev_handle, + unsigned char endpoint, unsigned char *buffer, int length, + int *transferred, unsigned int timeout, unsigned char type) +{ + struct libusb_transfer *transfer; + int completed = 0; + int r; + + if (usbi_handling_events(HANDLE_CTX(dev_handle))) + return LIBUSB_ERROR_BUSY; + + transfer = libusb_alloc_transfer(0); + if (!transfer) + return LIBUSB_ERROR_NO_MEM; + + libusb_fill_bulk_transfer(transfer, dev_handle, endpoint, buffer, length, + sync_transfer_cb, &completed, timeout); + transfer->type = type; + + r = libusb_submit_transfer(transfer); + if (r < 0) { + libusb_free_transfer(transfer); + return r; + } + + sync_transfer_wait_for_completion(transfer); + + if (transferred) + *transferred = transfer->actual_length; + + switch (transfer->status) { + case LIBUSB_TRANSFER_COMPLETED: + r = 0; + break; + case LIBUSB_TRANSFER_TIMED_OUT: + r = LIBUSB_ERROR_TIMEOUT; + break; + case LIBUSB_TRANSFER_STALL: + r = LIBUSB_ERROR_PIPE; + break; + case LIBUSB_TRANSFER_OVERFLOW: + r = LIBUSB_ERROR_OVERFLOW; + break; + case LIBUSB_TRANSFER_NO_DEVICE: + r = LIBUSB_ERROR_NO_DEVICE; + break; + case LIBUSB_TRANSFER_ERROR: + case LIBUSB_TRANSFER_CANCELLED: + r = LIBUSB_ERROR_IO; + break; + default: + usbi_warn(HANDLE_CTX(dev_handle), + "unrecognised status code %d", transfer->status); + r = LIBUSB_ERROR_OTHER; + } + + libusb_free_transfer(transfer); + return r; +} + +/** \ingroup libusb_syncio + * Perform a USB bulk transfer. The direction of the transfer is inferred from + * the direction bits of the endpoint address. + * + * For bulk reads, the length field indicates the maximum length of + * data you are expecting to receive. If less data arrives than expected, + * this function will return that data, so be sure to check the + * transferred output parameter. + * + * You should also check the transferred parameter for bulk writes. + * Not all of the data may have been written. + * + * Also check transferred when dealing with a timeout error code. + * libusb may have to split your transfer into a number of chunks to satisfy + * underlying O/S requirements, meaning that the timeout may expire after + * the first few chunks have completed. libusb is careful not to lose any data + * that may have been transferred; do not assume that timeout conditions + * indicate a complete lack of I/O. + * + * \param dev_handle a handle for the device to communicate with + * \param endpoint the address of a valid endpoint to communicate with + * \param data a suitably-sized data buffer for either input or output + * (depending on endpoint) + * \param length for bulk writes, the number of bytes from data to be sent. for + * bulk reads, the maximum number of bytes to receive into the data buffer. + * \param transferred output location for the number of bytes actually + * transferred. Since version 1.0.21 (\ref LIBUSB_API_VERSION >= 0x01000105), + * it is legal to pass a NULL pointer if you do not wish to receive this + * information. + * \param timeout timeout (in millseconds) that this function should wait + * before giving up due to no response being received. For an unlimited + * timeout, use value 0. + * + * \returns 0 on success (and populates transferred) + * \returns LIBUSB_ERROR_TIMEOUT if the transfer timed out (and populates + * transferred) + * \returns LIBUSB_ERROR_PIPE if the endpoint halted + * \returns LIBUSB_ERROR_OVERFLOW if the device offered more data, see + * \ref libusb_packetoverflow + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns LIBUSB_ERROR_BUSY if called from event handling context + * \returns another LIBUSB_ERROR code on other failures + */ +int API_EXPORTED libusb_bulk_transfer(struct libusb_device_handle *dev_handle, + unsigned char endpoint, unsigned char *data, int length, int *transferred, + unsigned int timeout) +{ + return do_sync_bulk_transfer(dev_handle, endpoint, data, length, + transferred, timeout, LIBUSB_TRANSFER_TYPE_BULK); +} + +/** \ingroup libusb_syncio + * Perform a USB interrupt transfer. The direction of the transfer is inferred + * from the direction bits of the endpoint address. + * + * For interrupt reads, the length field indicates the maximum length + * of data you are expecting to receive. If less data arrives than expected, + * this function will return that data, so be sure to check the + * transferred output parameter. + * + * You should also check the transferred parameter for interrupt + * writes. Not all of the data may have been written. + * + * Also check transferred when dealing with a timeout error code. + * libusb may have to split your transfer into a number of chunks to satisfy + * underlying O/S requirements, meaning that the timeout may expire after + * the first few chunks have completed. libusb is careful not to lose any data + * that may have been transferred; do not assume that timeout conditions + * indicate a complete lack of I/O. + * + * The default endpoint bInterval value is used as the polling interval. + * + * \param dev_handle a handle for the device to communicate with + * \param endpoint the address of a valid endpoint to communicate with + * \param data a suitably-sized data buffer for either input or output + * (depending on endpoint) + * \param length for bulk writes, the number of bytes from data to be sent. for + * bulk reads, the maximum number of bytes to receive into the data buffer. + * \param transferred output location for the number of bytes actually + * transferred. Since version 1.0.21 (\ref LIBUSB_API_VERSION >= 0x01000105), + * it is legal to pass a NULL pointer if you do not wish to receive this + * information. + * \param timeout timeout (in millseconds) that this function should wait + * before giving up due to no response being received. For an unlimited + * timeout, use value 0. + * + * \returns 0 on success (and populates transferred) + * \returns LIBUSB_ERROR_TIMEOUT if the transfer timed out + * \returns LIBUSB_ERROR_PIPE if the endpoint halted + * \returns LIBUSB_ERROR_OVERFLOW if the device offered more data, see + * \ref libusb_packetoverflow + * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected + * \returns LIBUSB_ERROR_BUSY if called from event handling context + * \returns another LIBUSB_ERROR code on other error + */ +int API_EXPORTED libusb_interrupt_transfer( + struct libusb_device_handle *dev_handle, unsigned char endpoint, + unsigned char *data, int length, int *transferred, unsigned int timeout) +{ + return do_sync_bulk_transfer(dev_handle, endpoint, data, length, + transferred, timeout, LIBUSB_TRANSFER_TYPE_INTERRUPT); +} diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/version.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/version.h new file mode 100644 index 000000000..6ce48a7d0 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/version.h @@ -0,0 +1,18 @@ +/* This file is parsed by m4 and windres and RC.EXE so please keep it simple. */ +#include "version_nano.h" +#ifndef LIBUSB_MAJOR +#define LIBUSB_MAJOR 1 +#endif +#ifndef LIBUSB_MINOR +#define LIBUSB_MINOR 0 +#endif +#ifndef LIBUSB_MICRO +#define LIBUSB_MICRO 21 +#endif +#ifndef LIBUSB_NANO +#define LIBUSB_NANO 0 +#endif +/* LIBUSB_RC is the release candidate suffix. Should normally be empty. */ +#ifndef LIBUSB_RC +#define LIBUSB_RC "" +#endif diff --git a/vendor/github.com/karalabe/gousb/internal/libusb/libusb/version_nano.h b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/version_nano.h new file mode 100644 index 000000000..0a5d1c992 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/internal/libusb/libusb/version_nano.h @@ -0,0 +1 @@ +#define LIBUSB_NANO 11182 diff --git a/vendor/github.com/karalabe/gousb/usb/config.go b/vendor/github.com/karalabe/gousb/usb/config.go new file mode 100644 index 000000000..840bce63c --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/config.go @@ -0,0 +1,153 @@ +// Copyright 2013 Google Inc. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package usb + +/* +#ifndef OS_WINDOWS + #include "os/threads_posix.h" +#endif +#include "libusbi.h" +#include "libusb.h" +*/ +import "C" + +import ( + "fmt" + "reflect" + "unsafe" +) + +type EndpointInfo struct { + Address uint8 + Attributes uint8 + MaxPacketSize uint16 + MaxIsoPacket uint32 + PollInterval uint8 + RefreshRate uint8 + SynchAddress uint8 +} + +func (e EndpointInfo) Number() int { + return int(e.Address) & ENDPOINT_NUM_MASK +} + +func (e EndpointInfo) Direction() EndpointDirection { + return EndpointDirection(e.Address) & ENDPOINT_DIR_MASK +} + +func (e EndpointInfo) String() string { + return fmt.Sprintf("Endpoint %d %-3s %s - %s %s [%d %d]", + e.Number(), e.Direction(), + TransferType(e.Attributes)&TRANSFER_TYPE_MASK, + IsoSyncType(e.Attributes)&ISO_SYNC_TYPE_MASK, + IsoUsageType(e.Attributes)&ISO_USAGE_TYPE_MASK, + e.MaxPacketSize, e.MaxIsoPacket, + ) +} + +type InterfaceInfo struct { + Number uint8 + Setups []InterfaceSetup +} + +func (i InterfaceInfo) String() string { + return fmt.Sprintf("Interface %02x (%d setups)", i.Number, len(i.Setups)) +} + +type InterfaceSetup struct { + Number uint8 + Alternate uint8 + IfClass uint8 + IfSubClass uint8 + IfProtocol uint8 + Endpoints []EndpointInfo +} + +func (a InterfaceSetup) String() string { + return fmt.Sprintf("Interface %02x Setup %02x", a.Number, a.Alternate) +} + +type ConfigInfo struct { + Config uint8 + Attributes uint8 + MaxPower uint8 + Interfaces []InterfaceInfo +} + +func (c ConfigInfo) String() string { + return fmt.Sprintf("Config %02x", c.Config) +} + +func newConfig(dev *C.libusb_device, cfg *C.struct_libusb_config_descriptor) ConfigInfo { + c := ConfigInfo{ + Config: uint8(cfg.bConfigurationValue), + Attributes: uint8(cfg.bmAttributes), + MaxPower: uint8(cfg.MaxPower), + } + + var ifaces []C.struct_libusb_interface + *(*reflect.SliceHeader)(unsafe.Pointer(&ifaces)) = reflect.SliceHeader{ + Data: uintptr(unsafe.Pointer(cfg._interface)), + Len: int(cfg.bNumInterfaces), + Cap: int(cfg.bNumInterfaces), + } + c.Interfaces = make([]InterfaceInfo, 0, len(ifaces)) + for _, iface := range ifaces { + if iface.num_altsetting == 0 { + continue + } + + var alts []C.struct_libusb_interface_descriptor + *(*reflect.SliceHeader)(unsafe.Pointer(&alts)) = reflect.SliceHeader{ + Data: uintptr(unsafe.Pointer(iface.altsetting)), + Len: int(iface.num_altsetting), + Cap: int(iface.num_altsetting), + } + descs := make([]InterfaceSetup, 0, len(alts)) + for _, alt := range alts { + i := InterfaceSetup{ + Number: uint8(alt.bInterfaceNumber), + Alternate: uint8(alt.bAlternateSetting), + IfClass: uint8(alt.bInterfaceClass), + IfSubClass: uint8(alt.bInterfaceSubClass), + IfProtocol: uint8(alt.bInterfaceProtocol), + } + var ends []C.struct_libusb_endpoint_descriptor + *(*reflect.SliceHeader)(unsafe.Pointer(&ends)) = reflect.SliceHeader{ + Data: uintptr(unsafe.Pointer(alt.endpoint)), + Len: int(alt.bNumEndpoints), + Cap: int(alt.bNumEndpoints), + } + i.Endpoints = make([]EndpointInfo, 0, len(ends)) + for _, end := range ends { + i.Endpoints = append(i.Endpoints, EndpointInfo{ + Address: uint8(end.bEndpointAddress), + Attributes: uint8(end.bmAttributes), + MaxPacketSize: uint16(end.wMaxPacketSize), + //MaxIsoPacket: uint32(C.libusb_get_max_iso_packet_size(dev, C.uchar(end.bEndpointAddress))), + PollInterval: uint8(end.bInterval), + RefreshRate: uint8(end.bRefresh), + SynchAddress: uint8(end.bSynchAddress), + }) + } + descs = append(descs, i) + } + c.Interfaces = append(c.Interfaces, InterfaceInfo{ + Number: descs[0].Number, + Setups: descs, + }) + } + return c +} diff --git a/vendor/github.com/karalabe/gousb/usb/constants.go b/vendor/github.com/karalabe/gousb/usb/constants.go new file mode 100644 index 000000000..7f0287d5c --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/constants.go @@ -0,0 +1,183 @@ +// Copyright 2013 Google Inc. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package usb + +// #include "libusb.h" +import "C" + +type Class uint8 + +const ( + CLASS_PER_INTERFACE Class = C.LIBUSB_CLASS_PER_INTERFACE + CLASS_AUDIO Class = C.LIBUSB_CLASS_AUDIO + CLASS_COMM Class = C.LIBUSB_CLASS_COMM + CLASS_HID Class = C.LIBUSB_CLASS_HID + CLASS_PRINTER Class = C.LIBUSB_CLASS_PRINTER + CLASS_PTP Class = C.LIBUSB_CLASS_PTP + CLASS_MASS_STORAGE Class = C.LIBUSB_CLASS_MASS_STORAGE + CLASS_HUB Class = C.LIBUSB_CLASS_HUB + CLASS_DATA Class = C.LIBUSB_CLASS_DATA + CLASS_WIRELESS Class = C.LIBUSB_CLASS_WIRELESS + CLASS_APPLICATION Class = C.LIBUSB_CLASS_APPLICATION + CLASS_VENDOR_SPEC Class = C.LIBUSB_CLASS_VENDOR_SPEC +) + +var classDescription = map[Class]string{ + CLASS_PER_INTERFACE: "per-interface", + CLASS_AUDIO: "audio", + CLASS_COMM: "communications", + CLASS_HID: "human interface device", + CLASS_PRINTER: "printer dclass", + CLASS_PTP: "picture transfer protocol", + CLASS_MASS_STORAGE: "mass storage", + CLASS_HUB: "hub", + CLASS_DATA: "data", + CLASS_WIRELESS: "wireless", + CLASS_APPLICATION: "application", + CLASS_VENDOR_SPEC: "vendor-specific", +} + +func (c Class) String() string { + return classDescription[c] +} + +type DescriptorType uint8 + +const ( + DT_DEVICE DescriptorType = C.LIBUSB_DT_DEVICE + DT_CONFIG DescriptorType = C.LIBUSB_DT_CONFIG + DT_STRING DescriptorType = C.LIBUSB_DT_STRING + DT_INTERFACE DescriptorType = C.LIBUSB_DT_INTERFACE + DT_ENDPOINT DescriptorType = C.LIBUSB_DT_ENDPOINT + DT_HID DescriptorType = C.LIBUSB_DT_HID + DT_REPORT DescriptorType = C.LIBUSB_DT_REPORT + DT_PHYSICAL DescriptorType = C.LIBUSB_DT_PHYSICAL + DT_HUB DescriptorType = C.LIBUSB_DT_HUB +) + +var descriptorTypeDescription = map[DescriptorType]string{ + DT_DEVICE: "device", + DT_CONFIG: "configuration", + DT_STRING: "string", + DT_INTERFACE: "interface", + DT_ENDPOINT: "endpoint", + DT_HID: "HID", + DT_REPORT: "HID report", + DT_PHYSICAL: "physical", + DT_HUB: "hub", +} + +func (dt DescriptorType) String() string { + return descriptorTypeDescription[dt] +} + +type EndpointDirection uint8 + +const ( + ENDPOINT_NUM_MASK = 0x03 + ENDPOINT_DIR_IN EndpointDirection = C.LIBUSB_ENDPOINT_IN + ENDPOINT_DIR_OUT EndpointDirection = C.LIBUSB_ENDPOINT_OUT + ENDPOINT_DIR_MASK EndpointDirection = 0x80 +) + +var endpointDirectionDescription = map[EndpointDirection]string{ + ENDPOINT_DIR_IN: "IN", + ENDPOINT_DIR_OUT: "OUT", +} + +func (ed EndpointDirection) String() string { + return endpointDirectionDescription[ed] +} + +type TransferType uint8 + +const ( + TRANSFER_TYPE_CONTROL TransferType = C.LIBUSB_TRANSFER_TYPE_CONTROL + TRANSFER_TYPE_ISOCHRONOUS TransferType = C.LIBUSB_TRANSFER_TYPE_ISOCHRONOUS + TRANSFER_TYPE_BULK TransferType = C.LIBUSB_TRANSFER_TYPE_BULK + TRANSFER_TYPE_INTERRUPT TransferType = C.LIBUSB_TRANSFER_TYPE_INTERRUPT + TRANSFER_TYPE_MASK TransferType = 0x03 +) + +var transferTypeDescription = map[TransferType]string{ + TRANSFER_TYPE_CONTROL: "control", + TRANSFER_TYPE_ISOCHRONOUS: "isochronous", + TRANSFER_TYPE_BULK: "bulk", + TRANSFER_TYPE_INTERRUPT: "interrupt", +} + +func (tt TransferType) String() string { + return transferTypeDescription[tt] +} + +type IsoSyncType uint8 + +const ( + ISO_SYNC_TYPE_NONE IsoSyncType = C.LIBUSB_ISO_SYNC_TYPE_NONE << 2 + ISO_SYNC_TYPE_ASYNC IsoSyncType = C.LIBUSB_ISO_SYNC_TYPE_ASYNC << 2 + ISO_SYNC_TYPE_ADAPTIVE IsoSyncType = C.LIBUSB_ISO_SYNC_TYPE_ADAPTIVE << 2 + ISO_SYNC_TYPE_SYNC IsoSyncType = C.LIBUSB_ISO_SYNC_TYPE_SYNC << 2 + ISO_SYNC_TYPE_MASK IsoSyncType = 0x0C +) + +var isoSyncTypeDescription = map[IsoSyncType]string{ + ISO_SYNC_TYPE_NONE: "unsynchronized", + ISO_SYNC_TYPE_ASYNC: "asynchronous", + ISO_SYNC_TYPE_ADAPTIVE: "adaptive", + ISO_SYNC_TYPE_SYNC: "synchronous", +} + +func (ist IsoSyncType) String() string { + return isoSyncTypeDescription[ist] +} + +type IsoUsageType uint8 + +const ( + ISO_USAGE_TYPE_DATA IsoUsageType = C.LIBUSB_ISO_USAGE_TYPE_DATA << 4 + ISO_USAGE_TYPE_FEEDBACK IsoUsageType = C.LIBUSB_ISO_USAGE_TYPE_FEEDBACK << 4 + ISO_USAGE_TYPE_IMPLICIT IsoUsageType = C.LIBUSB_ISO_USAGE_TYPE_IMPLICIT << 4 + ISO_USAGE_TYPE_MASK IsoUsageType = 0x30 +) + +var isoUsageTypeDescription = map[IsoUsageType]string{ + ISO_USAGE_TYPE_DATA: "data", + ISO_USAGE_TYPE_FEEDBACK: "feedback", + ISO_USAGE_TYPE_IMPLICIT: "implicit data", +} + +func (iut IsoUsageType) String() string { + return isoUsageTypeDescription[iut] +} + +type RequestType uint8 + +const ( + REQUEST_TYPE_STANDARD = C.LIBUSB_REQUEST_TYPE_STANDARD + REQUEST_TYPE_CLASS = C.LIBUSB_REQUEST_TYPE_CLASS + REQUEST_TYPE_VENDOR = C.LIBUSB_REQUEST_TYPE_VENDOR + REQUEST_TYPE_RESERVED = C.LIBUSB_REQUEST_TYPE_RESERVED +) + +var requestTypeDescription = map[RequestType]string{ + REQUEST_TYPE_STANDARD: "standard", + REQUEST_TYPE_CLASS: "class", + REQUEST_TYPE_VENDOR: "vendor", + REQUEST_TYPE_RESERVED: "reserved", +} + +func (rt RequestType) String() string { + return requestTypeDescription[rt] +} diff --git a/vendor/github.com/karalabe/gousb/usb/debug.go b/vendor/github.com/karalabe/gousb/usb/debug.go new file mode 100644 index 000000000..e7de8e522 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/debug.go @@ -0,0 +1,36 @@ +// Copyright 2013 Google Inc. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package usb + +// To enable internal debugging: +// -ldflags "-X github.com/karalabe/gousb/usb.debugInternal true" + +import ( + "io" + "io/ioutil" + "log" // TODO(kevlar): make a logger + "os" +) + +var debug *log.Logger +var debugInternal string + +func init() { + var out io.Writer = ioutil.Discard + if debugInternal != "" { + out = os.Stderr + } + debug = log.New(out, "usb", log.LstdFlags|log.Lshortfile) +} diff --git a/vendor/github.com/karalabe/gousb/usb/descriptor.go b/vendor/github.com/karalabe/gousb/usb/descriptor.go new file mode 100644 index 000000000..2551dfc23 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/descriptor.go @@ -0,0 +1,77 @@ +// Copyright 2013 Google Inc. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package usb + +/* +#ifndef OS_WINDOWS + #include "os/threads_posix.h" +#endif +#include "libusbi.h" +#include "libusb.h" +*/ +import "C" + +type Descriptor struct { + // Bus information + Bus uint8 // The bus on which the device was detected + Address uint8 // The address of the device on the bus + + // Version information + Spec BCD // USB Specification Release Number + Device BCD // The device version + + // Product information + Vendor ID // The Vendor identifer + Product ID // The Product identifier + + // Protocol information + Class uint8 // The class of this device + SubClass uint8 // The sub-class (within the class) of this device + Protocol uint8 // The protocol (within the sub-class) of this device + + // Configuration information + Configs []ConfigInfo +} + +func newDescriptor(dev *C.libusb_device) (*Descriptor, error) { + var desc C.struct_libusb_device_descriptor + if errno := C.libusb_get_device_descriptor(dev, &desc); errno < 0 { + return nil, usbError(errno) + } + + // Enumerate configurations + var cfgs []ConfigInfo + for i := 0; i < int(desc.bNumConfigurations); i++ { + var cfg *C.struct_libusb_config_descriptor + if errno := C.libusb_get_config_descriptor(dev, C.uint8_t(i), &cfg); errno < 0 { + return nil, usbError(errno) + } + cfgs = append(cfgs, newConfig(dev, cfg)) + C.libusb_free_config_descriptor(cfg) + } + + return &Descriptor{ + Bus: uint8(C.libusb_get_bus_number(dev)), + Address: uint8(C.libusb_get_device_address(dev)), + Spec: BCD(desc.bcdUSB), + Device: BCD(desc.bcdDevice), + Vendor: ID(desc.idVendor), + Product: ID(desc.idProduct), + Class: uint8(desc.bDeviceClass), + SubClass: uint8(desc.bDeviceSubClass), + Protocol: uint8(desc.bDeviceProtocol), + Configs: cfgs, + }, nil +} diff --git a/vendor/github.com/karalabe/gousb/usb/device.go b/vendor/github.com/karalabe/gousb/usb/device.go new file mode 100644 index 000000000..b4c4131fa --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/device.go @@ -0,0 +1,295 @@ +// Copyright 2013 Google Inc. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package usb + +/* +#ifndef OS_WINDOWS + #include "os/threads_posix.h" +#endif +#include "libusbi.h" +#include "libusb.h" +*/ +import "C" + +import ( + "fmt" + "reflect" + "sync" + "time" + "unsafe" +) + +var DefaultReadTimeout = 1 * time.Second +var DefaultWriteTimeout = 1 * time.Second +var DefaultControlTimeout = 250 * time.Millisecond //5 * time.Second + +type Device struct { + handle *C.libusb_device_handle + + // Embed the device information for easy access + *Descriptor + + // Timeouts + ReadTimeout time.Duration + WriteTimeout time.Duration + ControlTimeout time.Duration + + // Claimed interfaces + lock *sync.Mutex + claimed map[uint8]int + + // Detached kernel interfaces + detached map[uint8]int +} + +func newDevice(handle *C.libusb_device_handle, desc *Descriptor) (*Device, error) { + ifaces := 0 + d := &Device{ + handle: handle, + Descriptor: desc, + ReadTimeout: DefaultReadTimeout, + WriteTimeout: DefaultWriteTimeout, + ControlTimeout: DefaultControlTimeout, + lock: new(sync.Mutex), + claimed: make(map[uint8]int, ifaces), + detached: make(map[uint8]int), + } + + if err := d.detachKernelDriver(); err != nil { + d.Close() + return nil, err + } + + return d, nil +} + +// detachKernelDriver detaches any active kernel drivers, if supported by the platform. +// If there are any errors, like Context.ListDevices, only the final one will be returned. +func (d *Device) detachKernelDriver() (err error) { + for _, cfg := range d.Configs { + for _, iface := range cfg.Interfaces { + switch activeErr := C.libusb_kernel_driver_active(d.handle, C.int(iface.Number)); activeErr { + case C.LIBUSB_ERROR_NOT_SUPPORTED: + // no need to do any futher checking, no platform support + return + case 0: + continue + case 1: + switch detachErr := C.libusb_detach_kernel_driver(d.handle, C.int(iface.Number)); detachErr { + case C.LIBUSB_ERROR_NOT_SUPPORTED: + // shouldn't ever get here, should be caught by the outer switch + return + case 0: + d.detached[iface.Number]++ + case C.LIBUSB_ERROR_NOT_FOUND: + // this status is returned if libusb's driver is already attached to the device + d.detached[iface.Number]++ + default: + err = fmt.Errorf("usb: detach kernel driver: %s", usbError(detachErr)) + } + default: + err = fmt.Errorf("usb: active kernel driver check: %s", usbError(activeErr)) + } + } + } + + return +} + +// attachKernelDriver re-attaches kernel drivers to any previously detached interfaces, if supported by the platform. +// If there are any errors, like Context.ListDevices, only the final one will be returned. +func (d *Device) attachKernelDriver() (err error) { + for iface := range d.detached { + switch attachErr := C.libusb_attach_kernel_driver(d.handle, C.int(iface)); attachErr { + case C.LIBUSB_ERROR_NOT_SUPPORTED: + // no need to do any futher checking, no platform support + return + case 0: + continue + default: + err = fmt.Errorf("usb: attach kernel driver: %s", usbError(attachErr)) + } + } + + return +} + +func (d *Device) Reset() error { + if errno := C.libusb_reset_device(d.handle); errno != 0 { + return usbError(errno) + } + return nil +} + +func (d *Device) Control(rType, request uint8, val, idx uint16, data []byte) (int, error) { + //log.Printf("control xfer: %d:%d/%d:%d %x", idx, rType, request, val, string(data)) + dataSlice := (*reflect.SliceHeader)(unsafe.Pointer(&data)) + n := C.libusb_control_transfer( + d.handle, + C.uint8_t(rType), + C.uint8_t(request), + C.uint16_t(val), + C.uint16_t(idx), + (*C.uchar)(unsafe.Pointer(dataSlice.Data)), + C.uint16_t(len(data)), + C.uint(d.ControlTimeout/time.Millisecond)) + if n < 0 { + return int(n), usbError(n) + } + return int(n), nil +} + +// ActiveConfig returns the config id (not the index) of the active configuration. +// This corresponds to the ConfigInfo.Config field. +func (d *Device) ActiveConfig() (uint8, error) { + var cfg C.int + if errno := C.libusb_get_configuration(d.handle, &cfg); errno < 0 { + return 0, usbError(errno) + } + return uint8(cfg), nil +} + +// SetConfig attempts to change the active configuration. +// The cfg provided is the config id (not the index) of the configuration to set, +// which corresponds to the ConfigInfo.Config field. +func (d *Device) SetConfig(cfg uint8) error { + if errno := C.libusb_set_configuration(d.handle, C.int(cfg)); errno < 0 { + return usbError(errno) + } + return nil +} + +// Close the device. +func (d *Device) Close() error { + if d.handle == nil { + return fmt.Errorf("usb: double close on device") + } + d.lock.Lock() + defer d.lock.Unlock() + for iface := range d.claimed { + C.libusb_release_interface(d.handle, C.int(iface)) + } + d.attachKernelDriver() + C.libusb_close(d.handle) + d.handle = nil + return nil +} + +func (d *Device) OpenEndpoint(conf, iface, setup, epoint uint8) (Endpoint, error) { + end := &endpoint{ + Device: d, + } + + var setAlternate bool + for _, c := range d.Configs { + if c.Config != conf { + continue + } + debug.Printf("found conf: %#v\n", c) + for _, i := range c.Interfaces { + if i.Number != iface { + continue + } + debug.Printf("found iface: %#v\n", i) + for i, s := range i.Setups { + if s.Alternate != setup { + continue + } + setAlternate = i != 0 + + debug.Printf("found setup: %#v [default: %v]\n", s, !setAlternate) + for _, e := range s.Endpoints { + debug.Printf("ep %02x search: %#v\n", epoint, s) + if e.Address != epoint { + continue + } + end.InterfaceSetup = s + end.EndpointInfo = e + switch tt := TransferType(e.Attributes) & TRANSFER_TYPE_MASK; tt { + case TRANSFER_TYPE_BULK: + end.xfer = bulk_xfer + case TRANSFER_TYPE_INTERRUPT: + end.xfer = interrupt_xfer + case TRANSFER_TYPE_ISOCHRONOUS: + end.xfer = isochronous_xfer + default: + return nil, fmt.Errorf("usb: %s transfer is unsupported", tt) + } + goto found + } + return nil, fmt.Errorf("usb: unknown endpoint %02x", epoint) + } + return nil, fmt.Errorf("usb: unknown setup %02x", setup) + } + return nil, fmt.Errorf("usb: unknown interface %02x", iface) + } + return nil, fmt.Errorf("usb: unknown configuration %02x", conf) + +found: + + // Set the configuration + var activeConf C.int + if errno := C.libusb_get_configuration(d.handle, &activeConf); errno < 0 { + return nil, fmt.Errorf("usb: getcfg: %s", usbError(errno)) + } + if int(activeConf) != int(conf) { + if errno := C.libusb_set_configuration(d.handle, C.int(conf)); errno < 0 { + return nil, fmt.Errorf("usb: setcfg: %s", usbError(errno)) + } + } + + // Claim the interface + if errno := C.libusb_claim_interface(d.handle, C.int(iface)); errno < 0 { + return nil, fmt.Errorf("usb: claim: %s", usbError(errno)) + } + + // Increment the claim count + d.lock.Lock() + d.claimed[iface]++ + d.lock.Unlock() // unlock immediately because the next calls may block + + // Choose the alternate + if setAlternate { + if errno := C.libusb_set_interface_alt_setting(d.handle, C.int(iface), C.int(setup)); errno < 0 { + debug.Printf("altsetting error: %s", usbError(errno)) + return nil, fmt.Errorf("usb: setalt: %s", usbError(errno)) + } + } + + return end, nil +} + +func (d *Device) GetStringDescriptor(desc_index int) (string, error) { + + // allocate 200-byte array limited the length of string descriptor + goBuffer := make([]byte, 200) + + // get string descriptor from libusb. if errno < 0 then there are any errors. + // if errno >= 0; it is a length of result string descriptor + errno := C.libusb_get_string_descriptor_ascii( + d.handle, + C.uint8_t(desc_index), + (*C.uchar)(unsafe.Pointer(&goBuffer[0])), + 200) + + // if any errors occur + if errno < 0 { + return "", fmt.Errorf("usb: getstr: %s", usbError(errno)) + } + // convert slice of byte to string with limited length from errno + stringDescriptor := string(goBuffer[:errno]) + + return stringDescriptor, nil +} diff --git a/vendor/github.com/karalabe/gousb/usb/endpoint.go b/vendor/github.com/karalabe/gousb/usb/endpoint.go new file mode 100644 index 000000000..12b4ccf95 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/endpoint.go @@ -0,0 +1,100 @@ +// Copyright 2013 Google Inc. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package usb + +// #include "libusb.h" +import "C" + +import ( + "fmt" + "reflect" + "time" + "unsafe" +) + +type Endpoint interface { + Read(b []byte) (int, error) + Write(b []byte) (int, error) + Interface() InterfaceSetup + Info() EndpointInfo +} + +type endpoint struct { + *Device + InterfaceSetup + EndpointInfo + xfer func(*endpoint, []byte, time.Duration) (int, error) +} + +func (e *endpoint) Read(buf []byte) (int, error) { + if EndpointDirection(e.Address)&ENDPOINT_DIR_MASK != ENDPOINT_DIR_IN { + return 0, fmt.Errorf("usb: read: not an IN endpoint") + } + + return e.xfer(e, buf, e.ReadTimeout) +} + +func (e *endpoint) Write(buf []byte) (int, error) { + if EndpointDirection(e.Address)&ENDPOINT_DIR_MASK != ENDPOINT_DIR_OUT { + return 0, fmt.Errorf("usb: write: not an OUT endpoint") + } + + return e.xfer(e, buf, e.WriteTimeout) +} + +func (e *endpoint) Interface() InterfaceSetup { return e.InterfaceSetup } +func (e *endpoint) Info() EndpointInfo { return e.EndpointInfo } + +// TODO(kevlar): (*Endpoint).Close + +func bulk_xfer(e *endpoint, buf []byte, timeout time.Duration) (int, error) { + if len(buf) == 0 { + return 0, nil + } + + data := (*reflect.SliceHeader)(unsafe.Pointer(&buf)).Data + + var cnt C.int + if errno := C.libusb_bulk_transfer( + e.handle, + C.uchar(e.Address), + (*C.uchar)(unsafe.Pointer(data)), + C.int(len(buf)), + &cnt, + C.uint(timeout/time.Millisecond)); errno < 0 { + return 0, usbError(errno) + } + return int(cnt), nil +} + +func interrupt_xfer(e *endpoint, buf []byte, timeout time.Duration) (int, error) { + if len(buf) == 0 { + return 0, nil + } + + data := (*reflect.SliceHeader)(unsafe.Pointer(&buf)).Data + + var cnt C.int + if errno := C.libusb_interrupt_transfer( + e.handle, + C.uchar(e.Address), + (*C.uchar)(unsafe.Pointer(data)), + C.int(len(buf)), + &cnt, + C.uint(timeout/time.Millisecond)); errno < 0 { + return 0, usbError(errno) + } + return int(cnt), nil +} diff --git a/vendor/github.com/karalabe/gousb/usb/error.go b/vendor/github.com/karalabe/gousb/usb/error.go new file mode 100644 index 000000000..30d47bce3 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/error.go @@ -0,0 +1,92 @@ +// Copyright 2013 Google Inc. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package usb + +import ( + "fmt" +) + +// #include "libusb.h" +import "C" + +type usbError C.int + +func (e usbError) Error() string { + return fmt.Sprintf("libusb: %s [code %d]", usbErrorString[e], int(e)) +} + +const ( + SUCCESS usbError = C.LIBUSB_SUCCESS + ERROR_IO usbError = C.LIBUSB_ERROR_IO + ERROR_INVALID_PARAM usbError = C.LIBUSB_ERROR_INVALID_PARAM + ERROR_ACCESS usbError = C.LIBUSB_ERROR_ACCESS + ERROR_NO_DEVICE usbError = C.LIBUSB_ERROR_NO_DEVICE + ERROR_NOT_FOUND usbError = C.LIBUSB_ERROR_NOT_FOUND + ERROR_BUSY usbError = C.LIBUSB_ERROR_BUSY + ERROR_TIMEOUT usbError = C.LIBUSB_ERROR_TIMEOUT + ERROR_OVERFLOW usbError = C.LIBUSB_ERROR_OVERFLOW + ERROR_PIPE usbError = C.LIBUSB_ERROR_PIPE + ERROR_INTERRUPTED usbError = C.LIBUSB_ERROR_INTERRUPTED + ERROR_NO_MEM usbError = C.LIBUSB_ERROR_NO_MEM + ERROR_NOT_SUPPORTED usbError = C.LIBUSB_ERROR_NOT_SUPPORTED + ERROR_OTHER usbError = C.LIBUSB_ERROR_OTHER +) + +var usbErrorString = map[usbError]string{ + C.LIBUSB_SUCCESS: "success", + C.LIBUSB_ERROR_IO: "i/o error", + C.LIBUSB_ERROR_INVALID_PARAM: "invalid param", + C.LIBUSB_ERROR_ACCESS: "bad access", + C.LIBUSB_ERROR_NO_DEVICE: "no device", + C.LIBUSB_ERROR_NOT_FOUND: "not found", + C.LIBUSB_ERROR_BUSY: "device or resource busy", + C.LIBUSB_ERROR_TIMEOUT: "timeout", + C.LIBUSB_ERROR_OVERFLOW: "overflow", + C.LIBUSB_ERROR_PIPE: "pipe error", + C.LIBUSB_ERROR_INTERRUPTED: "interrupted", + C.LIBUSB_ERROR_NO_MEM: "out of memory", + C.LIBUSB_ERROR_NOT_SUPPORTED: "not supported", + C.LIBUSB_ERROR_OTHER: "unknown error", +} + +type TransferStatus uint8 + +const ( + LIBUSB_TRANSFER_COMPLETED TransferStatus = C.LIBUSB_TRANSFER_COMPLETED + LIBUSB_TRANSFER_ERROR TransferStatus = C.LIBUSB_TRANSFER_ERROR + LIBUSB_TRANSFER_TIMED_OUT TransferStatus = C.LIBUSB_TRANSFER_TIMED_OUT + LIBUSB_TRANSFER_CANCELLED TransferStatus = C.LIBUSB_TRANSFER_CANCELLED + LIBUSB_TRANSFER_STALL TransferStatus = C.LIBUSB_TRANSFER_STALL + LIBUSB_TRANSFER_NO_DEVICE TransferStatus = C.LIBUSB_TRANSFER_NO_DEVICE + LIBUSB_TRANSFER_OVERFLOW TransferStatus = C.LIBUSB_TRANSFER_OVERFLOW +) + +var transferStatusDescription = map[TransferStatus]string{ + LIBUSB_TRANSFER_COMPLETED: "transfer completed without error", + LIBUSB_TRANSFER_ERROR: "transfer failed", + LIBUSB_TRANSFER_TIMED_OUT: "transfer timed out", + LIBUSB_TRANSFER_CANCELLED: "transfer was cancelled", + LIBUSB_TRANSFER_STALL: "halt condition detected (endpoint stalled) or control request not supported", + LIBUSB_TRANSFER_NO_DEVICE: "device was disconnected", + LIBUSB_TRANSFER_OVERFLOW: "device sent more data than requested", +} + +func (ts TransferStatus) String() string { + return transferStatusDescription[ts] +} + +func (ts TransferStatus) Error() string { + return "libusb: " + ts.String() +} diff --git a/vendor/github.com/karalabe/gousb/usb/iso.c b/vendor/github.com/karalabe/gousb/usb/iso.c new file mode 100644 index 000000000..054486318 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/iso.c @@ -0,0 +1,79 @@ +#include "libusb.h" +#include +#include + +void print_xfer(struct libusb_transfer *xfer); +void iso_callback(void *); + +void callback(struct libusb_transfer *xfer) { + //printf("Callback!\n"); + //print_xfer(xfer); + iso_callback(xfer->user_data); +} + +int submit(struct libusb_transfer *xfer) { + xfer->callback = &callback; + xfer->status = -1; + //print_xfer(xfer); + //printf("Transfer submitted\n"); + + /* fake + strcpy(xfer->buffer, "hello"); + xfer->actual_length = 5; + callback(xfer); + return 0; */ + return libusb_submit_transfer(xfer); +} + +void print_xfer(struct libusb_transfer *xfer) { + int i; + + printf("Transfer:\n"); + printf(" dev_handle: %p\n", xfer->dev_handle); + printf(" flags: %08x\n", xfer->flags); + printf(" endpoint: %x\n", xfer->endpoint); + printf(" type: %x\n", xfer->type); + printf(" timeout: %dms\n", xfer->timeout); + printf(" status: %x\n", xfer->status); + printf(" length: %d (act: %d)\n", xfer->length, xfer->actual_length); + printf(" callback: %p\n", xfer->callback); + printf(" user_data: %p\n", xfer->user_data); + printf(" buffer: %p\n", xfer->buffer); + printf(" num_iso_pkts: %d\n", xfer->num_iso_packets); + printf(" packets:\n"); + for (i = 0; i < xfer->num_iso_packets; i++) { + printf(" [%04d] %d (act: %d) %x\n", i, + xfer->iso_packet_desc[i].length, + xfer->iso_packet_desc[i].actual_length, + xfer->iso_packet_desc[i].status); + } +} + +int extract_data(struct libusb_transfer *xfer, void *raw, int max, unsigned char *status) { + int i; + int copied = 0; + unsigned char *in = xfer->buffer; + unsigned char *out = raw; + for (i = 0; i < xfer->num_iso_packets; i++) { + struct libusb_iso_packet_descriptor pkt = xfer->iso_packet_desc[i]; + + // Copy the data + int len = pkt.actual_length; + if (len > max) { + len = max; + } + memcpy(out, in, len); + copied += len; + + // Increment offsets + in += pkt.length; + out += len; + + // Extract first error + if (pkt.status == 0 || *status != 0) { + continue; + } + *status = pkt.status; + } + return copied; +} diff --git a/vendor/github.com/karalabe/gousb/usb/iso.go b/vendor/github.com/karalabe/gousb/usb/iso.go new file mode 100644 index 000000000..1ba694e0e --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/iso.go @@ -0,0 +1,148 @@ +// Copyright 2013 Google Inc. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package usb + +/* +#include "libusb.h" + +int submit(struct libusb_transfer *xfer); +void print_xfer(struct libusb_transfer *xfer); +int extract_data(struct libusb_transfer *xfer, void *data, int max, unsigned char *status); +*/ +import "C" + +import ( + "fmt" + "log" + "time" + "unsafe" +) + +//export iso_callback +func iso_callback(cptr unsafe.Pointer) { + ch := *(*chan struct{})(cptr) + close(ch) +} + +func (end *endpoint) allocTransfer() *Transfer { + // Use libusb_get_max_iso_packet_size ? + const ( + iso_packets = 8 // 128 // 242 + packet_size = 2 * 960 // 1760 + ) + + xfer := C.libusb_alloc_transfer(C.int(iso_packets)) + if xfer == nil { + log.Printf("usb: transfer allocation failed?!") + return nil + } + + buf := make([]byte, iso_packets*packet_size) + done := make(chan struct{}, 1) + + xfer.dev_handle = end.Device.handle + xfer.endpoint = C.uchar(end.Address) + xfer._type = C.LIBUSB_TRANSFER_TYPE_ISOCHRONOUS + + xfer.buffer = (*C.uchar)((unsafe.Pointer)(&buf[0])) + xfer.length = C.int(len(buf)) + xfer.num_iso_packets = iso_packets + + C.libusb_set_iso_packet_lengths(xfer, packet_size) + /* + pkts := *(*[]C.struct_libusb_packet_descriptor)(unsafe.Pointer(&reflect.SliceHeader{ + Data: uintptr(unsafe.Pointer(&xfer.iso_packet_desc)), + Len: iso_packets, + Cap: iso_packets, + })) + */ + + t := &Transfer{ + xfer: xfer, + done: done, + buf: buf, + } + xfer.user_data = (unsafe.Pointer)(&t.done) + + return t +} + +type Transfer struct { + xfer *C.struct_libusb_transfer + pkts []*C.struct_libusb_packet_descriptor + done chan struct{} + buf []byte +} + +func (t *Transfer) Submit(timeout time.Duration) error { + //log.Printf("iso: submitting %#v", t.xfer) + t.xfer.timeout = C.uint(timeout / time.Millisecond) + if errno := C.submit(t.xfer); errno < 0 { + return usbError(errno) + } + return nil +} + +func (t *Transfer) Wait(b []byte) (n int, err error) { + select { + case <-time.After(10 * time.Second): + return 0, fmt.Errorf("wait timed out after 10s") + case <-t.done: + } + // Non-iso transfers: + //n = int(t.xfer.actual_length) + //copy(b, ((*[1 << 16]byte)(unsafe.Pointer(t.xfer.buffer)))[:n]) + + //C.print_xfer(t.xfer) + /* + buf, offset := ((*[1 << 16]byte)(unsafe.Pointer(t.xfer.buffer))), 0 + for i, pkt := range *t.pkts { + log.Printf("Type is %T", t.pkts) + n += copy(b[n:], buf[offset:][:pkt.actual_length]) + offset += pkt.Length + if pkt.status != 0 && err == nil { + err = error(TransferStatus(pkt.status)) + } + } + */ + var status uint8 + n = int(C.extract_data(t.xfer, unsafe.Pointer(&b[0]), C.int(len(b)), (*C.uchar)(unsafe.Pointer(&status)))) + if status != 0 { + err = TransferStatus(status) + } + return n, err +} + +func (t *Transfer) Close() error { + C.libusb_free_transfer(t.xfer) + return nil +} + +func isochronous_xfer(e *endpoint, buf []byte, timeout time.Duration) (int, error) { + t := e.allocTransfer() + defer t.Close() + + if err := t.Submit(timeout); err != nil { + log.Printf("iso: xfer failed to submit: %s", err) + return 0, err + } + + n, err := t.Wait(buf) + if err != nil { + log.Printf("iso: xfer failed: %s", err) + return 0, err + } + return n, err +} diff --git a/vendor/github.com/karalabe/gousb/usb/misc.go b/vendor/github.com/karalabe/gousb/usb/misc.go new file mode 100644 index 000000000..6e25431bf --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/misc.go @@ -0,0 +1,47 @@ +// Copyright 2013 Google Inc. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package usb + +import ( + "fmt" +) + +type BCD uint16 + +const ( + USB_2_0 BCD = 0x0200 + USB_1_1 BCD = 0x0110 + USB_1_0 BCD = 0x0100 +) + +func (d BCD) Int() (i int) { + ten := 1 + for o := uint(0); o < 4; o++ { + n := ((0xF << (o * 4)) & d) >> (o * 4) + i += int(n) * ten + ten *= 10 + } + return +} + +func (d BCD) String() string { + return fmt.Sprintf("%02x.%02x", int(d>>8), int(d&0xFF)) +} + +type ID uint16 + +func (id ID) String() string { + return fmt.Sprintf("%04x", int(id)) +} diff --git a/vendor/github.com/karalabe/gousb/usb/usb.go b/vendor/github.com/karalabe/gousb/usb/usb.go new file mode 100644 index 000000000..366827e69 --- /dev/null +++ b/vendor/github.com/karalabe/gousb/usb/usb.go @@ -0,0 +1,178 @@ +// Copyright 2013 Google Inc. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package usb provides a wrapper around libusb-1.0. +package usb + +/* +#cgo CFLAGS: -I../internal/libusb/libusb +#cgo CFLAGS: -DDEFAULT_VISIBILITY="" +#cgo linux CFLAGS: -DOS_LINUX -D_GNU_SOURCE -DPOLL_NFDS_TYPE=int +#cgo darwin CFLAGS: -DOS_DARWIN -DPOLL_NFDS_TYPE=int +#cgo darwin LDFLAGS: -framework CoreFoundation -framework IOKit -lobjc +#cgo openbsd CFLAGS: -DOS_OPENBSD -DPOLL_NFDS_TYPE=int +#cgo windows CFLAGS: -DOS_WINDOWS -DUSE_USBDK -DPOLL_NFDS_TYPE=int + +#if defined(OS_LINUX) || defined(OS_DARWIN) || defined(OS_OPENBSD) + #include + #include "os/threads_posix.c" + #include "os/poll_posix.c" +#elif defined(OS_WINDOWS) + #include "os/threads_windows.c" + #include "os/poll_windows.c" +#endif + +#ifdef OS_LINUX + #include "os/linux_usbfs.c" + #include "os/linux_netlink.c" +#elif OS_DARWIN + #include "os/darwin_usb.c" +#elif OS_OPENBSD + #include "os/openbsd_usb.c" +#elif OS_WINDOWS + #include "os/windows_nt_common.c" + #include "os/windows_usbdk.c" +#endif + +#include "core.c" +#include "descriptor.c" +#include "hotplug.c" +#include "io.c" +#include "strerror.c" +#include "sync.c" +*/ +import "C" + +import ( + "log" + "reflect" + "unsafe" +) + +type Context struct { + ctx *C.libusb_context + done chan struct{} +} + +func (c *Context) Debug(level int) { + C.libusb_set_debug(c.ctx, C.int(level)) +} + +func NewContext() (*Context, error) { + c := &Context{ + done: make(chan struct{}), + } + + if errno := C.libusb_init(&c.ctx); errno != 0 { + return nil, usbError(errno) + } + + go func() { + tv := C.struct_timeval{ + tv_sec: 0, + tv_usec: 100000, + } + for { + select { + case <-c.done: + return + default: + } + if errno := C.libusb_handle_events_timeout_completed(c.ctx, &tv, nil); errno < 0 { + log.Printf("handle_events: error: %s", usbError(errno)) + continue + } + //log.Printf("handle_events returned") + } + }() + + return c, nil +} + +// ListDevices calls each with each enumerated device. +// If the function returns true, the device is opened and a Device is returned if the operation succeeds. +// Every Device returned (whether an error is also returned or not) must be closed. +// If there are any errors enumerating the devices, +// the final one is returned along with any successfully opened devices. +func (c *Context) ListDevices(each func(desc *Descriptor) bool) ([]*Device, error) { + var list **C.libusb_device + cnt := C.libusb_get_device_list(c.ctx, &list) + if cnt < 0 { + return nil, usbError(cnt) + } + defer C.libusb_free_device_list(list, 1) + + var slice []*C.libusb_device + *(*reflect.SliceHeader)(unsafe.Pointer(&slice)) = reflect.SliceHeader{ + Data: uintptr(unsafe.Pointer(list)), + Len: int(cnt), + Cap: int(cnt), + } + + var reterr error + var ret []*Device + for _, dev := range slice { + desc, err := newDescriptor(dev) + if err != nil { + reterr = err + continue + } + + if each(desc) { + var handle *C.libusb_device_handle + if errno := C.libusb_open(dev, &handle); errno != 0 { + reterr = usbError(errno) + continue + } + if dev, err := newDevice(handle, desc); err != nil { + reterr = err + } else { + ret = append(ret, dev) + } + } + } + return ret, reterr +} + +// OpenDeviceWithVidPid opens Device from specific VendorId and ProductId. +// If there are any errors, it'll returns at second value. +func (c *Context) OpenDeviceWithVidPid(vid, pid int) (*Device, error) { + + handle := C.libusb_open_device_with_vid_pid(c.ctx, (C.uint16_t)(vid), (C.uint16_t)(pid)) + if handle == nil { + return nil, ERROR_NOT_FOUND + } + + dev := C.libusb_get_device(handle) + if dev == nil { + return nil, ERROR_NO_DEVICE + } + + desc, err := newDescriptor(dev) + + // return an error from nil-handle and nil-device + if err != nil { + return nil, err + } + return newDevice(handle, desc) +} + +func (c *Context) Close() error { + close(c.done) + if c.ctx != nil { + C.libusb_exit(c.ctx) + } + c.ctx = nil + return nil +}