1787 lines
52 KiB
C++
1787 lines
52 KiB
C++
//
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// reactive_socket_service.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP
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#define ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/push_options.hpp"
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#include "asio/detail/push_options.hpp"
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#include <boost/shared_ptr.hpp>
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#include "asio/detail/pop_options.hpp"
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#include "asio/buffer.hpp"
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#include "asio/error.hpp"
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#include "asio/io_service.hpp"
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#include "asio/socket_base.hpp"
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#include "asio/detail/bind_handler.hpp"
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#include "asio/detail/handler_base_from_member.hpp"
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#include "asio/detail/noncopyable.hpp"
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#include "asio/detail/service_base.hpp"
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#include "asio/detail/socket_holder.hpp"
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#include "asio/detail/socket_ops.hpp"
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#include "asio/detail/socket_types.hpp"
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namespace asio {
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namespace detail {
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template <typename Protocol, typename Reactor>
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class reactive_socket_service
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: public asio::detail::service_base<
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reactive_socket_service<Protocol, Reactor> >
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{
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public:
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// The protocol type.
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typedef Protocol protocol_type;
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// The endpoint type.
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typedef typename Protocol::endpoint endpoint_type;
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// The native type of a socket.
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typedef socket_type native_type;
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// The implementation type of the socket.
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class implementation_type
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: private asio::detail::noncopyable
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{
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public:
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// Default constructor.
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implementation_type()
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: socket_(invalid_socket),
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flags_(0),
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protocol_(endpoint_type().protocol())
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{
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}
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private:
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// Only this service will have access to the internal values.
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friend class reactive_socket_service<Protocol, Reactor>;
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// The native socket representation.
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socket_type socket_;
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enum
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{
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// The user wants a non-blocking socket.
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user_set_non_blocking = 1,
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// The implementation wants a non-blocking socket (in order to be able to
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// perform asynchronous read and write operations).
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internal_non_blocking = 2,
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// Helper "flag" used to determine whether the socket is non-blocking.
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non_blocking = user_set_non_blocking | internal_non_blocking,
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// User wants connection_aborted errors, which are disabled by default.
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enable_connection_aborted = 4,
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// The user set the linger option. Needs to be checked when closing.
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user_set_linger = 8
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};
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// Flags indicating the current state of the socket.
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unsigned char flags_;
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// The protocol associated with the socket.
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protocol_type protocol_;
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// Per-descriptor data used by the reactor.
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typename Reactor::per_descriptor_data reactor_data_;
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};
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// The maximum number of buffers to support in a single operation.
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enum { max_buffers = 64 < max_iov_len ? 64 : max_iov_len };
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// Constructor.
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reactive_socket_service(asio::io_service& io_service)
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: asio::detail::service_base<
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reactive_socket_service<Protocol, Reactor> >(io_service),
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reactor_(asio::use_service<Reactor>(io_service))
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{
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reactor_.init_task();
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}
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// Destroy all user-defined handler objects owned by the service.
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void shutdown_service()
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{
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}
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// Construct a new socket implementation.
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void construct(implementation_type& impl)
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{
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impl.socket_ = invalid_socket;
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impl.flags_ = 0;
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}
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// Destroy a socket implementation.
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void destroy(implementation_type& impl)
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{
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if (impl.socket_ != invalid_socket)
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{
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reactor_.close_descriptor(impl.socket_, impl.reactor_data_);
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if (impl.flags_ & implementation_type::non_blocking)
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{
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ioctl_arg_type non_blocking = 0;
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asio::error_code ignored_ec;
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socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ignored_ec);
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impl.flags_ &= ~implementation_type::non_blocking;
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}
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if (impl.flags_ & implementation_type::user_set_linger)
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{
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::linger opt;
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opt.l_onoff = 0;
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opt.l_linger = 0;
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asio::error_code ignored_ec;
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socket_ops::setsockopt(impl.socket_,
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SOL_SOCKET, SO_LINGER, &opt, sizeof(opt), ignored_ec);
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}
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asio::error_code ignored_ec;
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socket_ops::close(impl.socket_, ignored_ec);
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impl.socket_ = invalid_socket;
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}
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}
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// Open a new socket implementation.
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asio::error_code open(implementation_type& impl,
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const protocol_type& protocol, asio::error_code& ec)
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{
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if (is_open(impl))
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{
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ec = asio::error::already_open;
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return ec;
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}
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socket_holder sock(socket_ops::socket(protocol.family(),
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protocol.type(), protocol.protocol(), ec));
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if (sock.get() == invalid_socket)
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return ec;
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if (int err = reactor_.register_descriptor(sock.get(), impl.reactor_data_))
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{
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ec = asio::error_code(err,
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asio::error::get_system_category());
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return ec;
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}
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impl.socket_ = sock.release();
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impl.flags_ = 0;
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impl.protocol_ = protocol;
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ec = asio::error_code();
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return ec;
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}
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// Assign a native socket to a socket implementation.
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asio::error_code assign(implementation_type& impl,
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const protocol_type& protocol, const native_type& native_socket,
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asio::error_code& ec)
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{
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if (is_open(impl))
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{
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ec = asio::error::already_open;
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return ec;
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}
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if (int err = reactor_.register_descriptor(
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native_socket, impl.reactor_data_))
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{
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ec = asio::error_code(err,
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asio::error::get_system_category());
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return ec;
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}
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impl.socket_ = native_socket;
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impl.flags_ = 0;
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impl.protocol_ = protocol;
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ec = asio::error_code();
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return ec;
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}
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// Determine whether the socket is open.
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bool is_open(const implementation_type& impl) const
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{
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return impl.socket_ != invalid_socket;
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}
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// Destroy a socket implementation.
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asio::error_code close(implementation_type& impl,
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asio::error_code& ec)
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{
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if (is_open(impl))
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{
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reactor_.close_descriptor(impl.socket_, impl.reactor_data_);
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if (impl.flags_ & implementation_type::non_blocking)
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{
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ioctl_arg_type non_blocking = 0;
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asio::error_code ignored_ec;
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socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ignored_ec);
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impl.flags_ &= ~implementation_type::non_blocking;
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}
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if (socket_ops::close(impl.socket_, ec) == socket_error_retval)
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return ec;
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impl.socket_ = invalid_socket;
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}
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ec = asio::error_code();
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return ec;
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}
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// Get the native socket representation.
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native_type native(implementation_type& impl)
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{
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return impl.socket_;
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}
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// Cancel all operations associated with the socket.
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asio::error_code cancel(implementation_type& impl,
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asio::error_code& ec)
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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reactor_.cancel_ops(impl.socket_, impl.reactor_data_);
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ec = asio::error_code();
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return ec;
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}
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// Determine whether the socket is at the out-of-band data mark.
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bool at_mark(const implementation_type& impl,
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asio::error_code& ec) const
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return false;
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}
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asio::detail::ioctl_arg_type value = 0;
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socket_ops::ioctl(impl.socket_, SIOCATMARK, &value, ec);
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#if defined(ENOTTY)
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if (ec.value() == ENOTTY)
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ec = asio::error::not_socket;
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#endif // defined(ENOTTY)
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return ec ? false : value != 0;
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}
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// Determine the number of bytes available for reading.
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std::size_t available(const implementation_type& impl,
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asio::error_code& ec) const
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return 0;
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}
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asio::detail::ioctl_arg_type value = 0;
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socket_ops::ioctl(impl.socket_, FIONREAD, &value, ec);
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#if defined(ENOTTY)
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if (ec.value() == ENOTTY)
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ec = asio::error::not_socket;
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#endif // defined(ENOTTY)
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return ec ? static_cast<std::size_t>(0) : static_cast<std::size_t>(value);
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}
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// Bind the socket to the specified local endpoint.
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asio::error_code bind(implementation_type& impl,
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const endpoint_type& endpoint, asio::error_code& ec)
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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socket_ops::bind(impl.socket_, endpoint.data(), endpoint.size(), ec);
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return ec;
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}
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// Place the socket into the state where it will listen for new connections.
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asio::error_code listen(implementation_type& impl, int backlog,
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asio::error_code& ec)
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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socket_ops::listen(impl.socket_, backlog, ec);
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return ec;
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}
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// Set a socket option.
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template <typename Option>
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asio::error_code set_option(implementation_type& impl,
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const Option& option, asio::error_code& ec)
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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if (option.level(impl.protocol_) == custom_socket_option_level
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&& option.name(impl.protocol_) == enable_connection_aborted_option)
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{
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if (option.size(impl.protocol_) != sizeof(int))
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{
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ec = asio::error::invalid_argument;
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}
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else
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{
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if (*reinterpret_cast<const int*>(option.data(impl.protocol_)))
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impl.flags_ |= implementation_type::enable_connection_aborted;
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else
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impl.flags_ &= ~implementation_type::enable_connection_aborted;
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ec = asio::error_code();
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}
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return ec;
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}
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else
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{
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if (option.level(impl.protocol_) == SOL_SOCKET
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&& option.name(impl.protocol_) == SO_LINGER)
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{
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impl.flags_ |= implementation_type::user_set_linger;
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}
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socket_ops::setsockopt(impl.socket_,
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option.level(impl.protocol_), option.name(impl.protocol_),
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option.data(impl.protocol_), option.size(impl.protocol_), ec);
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#if defined(__MACH__) && defined(__APPLE__) \
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|| defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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// To implement portable behaviour for SO_REUSEADDR with UDP sockets we
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// need to also set SO_REUSEPORT on BSD-based platforms.
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if (!ec && impl.protocol_.type() == SOCK_DGRAM
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&& option.level(impl.protocol_) == SOL_SOCKET
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&& option.name(impl.protocol_) == SO_REUSEADDR)
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{
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asio::error_code ignored_ec;
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socket_ops::setsockopt(impl.socket_, SOL_SOCKET, SO_REUSEPORT,
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option.data(impl.protocol_), option.size(impl.protocol_),
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ignored_ec);
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}
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#endif
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return ec;
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}
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}
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// Set a socket option.
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template <typename Option>
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asio::error_code get_option(const implementation_type& impl,
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Option& option, asio::error_code& ec) const
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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if (option.level(impl.protocol_) == custom_socket_option_level
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&& option.name(impl.protocol_) == enable_connection_aborted_option)
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{
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if (option.size(impl.protocol_) != sizeof(int))
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{
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ec = asio::error::invalid_argument;
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}
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else
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{
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int* target = reinterpret_cast<int*>(option.data(impl.protocol_));
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if (impl.flags_ & implementation_type::enable_connection_aborted)
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*target = 1;
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else
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*target = 0;
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option.resize(impl.protocol_, sizeof(int));
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ec = asio::error_code();
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}
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return ec;
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}
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else
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{
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size_t size = option.size(impl.protocol_);
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socket_ops::getsockopt(impl.socket_,
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option.level(impl.protocol_), option.name(impl.protocol_),
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option.data(impl.protocol_), &size, ec);
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if (!ec)
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option.resize(impl.protocol_, size);
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return ec;
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}
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}
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// Perform an IO control command on the socket.
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template <typename IO_Control_Command>
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asio::error_code io_control(implementation_type& impl,
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IO_Control_Command& command, asio::error_code& ec)
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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if (command.name() == static_cast<int>(FIONBIO))
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{
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// Flags are manipulated in a temporary variable so that the socket
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// implementation is not updated unless the ioctl operation succeeds.
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unsigned char new_flags = impl.flags_;
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if (command.get())
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new_flags |= implementation_type::user_set_non_blocking;
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else
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new_flags &= ~implementation_type::user_set_non_blocking;
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// Perform ioctl on socket if the non-blocking state has changed.
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if (!(impl.flags_ & implementation_type::non_blocking)
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&& (new_flags & implementation_type::non_blocking))
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{
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ioctl_arg_type non_blocking = 1;
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socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec);
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}
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else if ((impl.flags_ & implementation_type::non_blocking)
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&& !(new_flags & implementation_type::non_blocking))
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{
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ioctl_arg_type non_blocking = 0;
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socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec);
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}
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else
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{
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ec = asio::error_code();
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}
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// Update socket implementation's flags only if successful.
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if (!ec)
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impl.flags_ = new_flags;
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}
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else
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{
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socket_ops::ioctl(impl.socket_, command.name(),
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static_cast<ioctl_arg_type*>(command.data()), ec);
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}
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return ec;
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}
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// Get the local endpoint.
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endpoint_type local_endpoint(const implementation_type& impl,
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asio::error_code& ec) const
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return endpoint_type();
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}
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endpoint_type endpoint;
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std::size_t addr_len = endpoint.capacity();
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if (socket_ops::getsockname(impl.socket_, endpoint.data(), &addr_len, ec))
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return endpoint_type();
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endpoint.resize(addr_len);
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return endpoint;
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}
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// Get the remote endpoint.
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endpoint_type remote_endpoint(const implementation_type& impl,
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asio::error_code& ec) const
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return endpoint_type();
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}
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endpoint_type endpoint;
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std::size_t addr_len = endpoint.capacity();
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if (socket_ops::getpeername(impl.socket_, endpoint.data(), &addr_len, ec))
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return endpoint_type();
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endpoint.resize(addr_len);
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return endpoint;
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}
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/// Disable sends or receives on the socket.
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asio::error_code shutdown(implementation_type& impl,
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socket_base::shutdown_type what, asio::error_code& ec)
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return ec;
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}
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socket_ops::shutdown(impl.socket_, what, ec);
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return ec;
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}
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|
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// Send the given data to the peer.
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template <typename ConstBufferSequence>
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size_t send(implementation_type& impl, const ConstBufferSequence& buffers,
|
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socket_base::message_flags flags, asio::error_code& ec)
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{
|
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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return 0;
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}
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|
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// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename ConstBufferSequence::const_iterator iter = buffers.begin();
|
|
typename ConstBufferSequence::const_iterator end = buffers.end();
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size_t i = 0;
|
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size_t total_buffer_size = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
socket_ops::init_buf(bufs[i],
|
|
asio::buffer_cast<const void*>(buffer),
|
|
asio::buffer_size(buffer));
|
|
total_buffer_size += asio::buffer_size(buffer);
|
|
}
|
|
|
|
// A request to receive 0 bytes on a stream socket is a no-op.
|
|
if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
|
|
{
|
|
ec = asio::error_code();
|
|
return 0;
|
|
}
|
|
|
|
// Send the data.
|
|
for (;;)
|
|
{
|
|
// Try to complete the operation without blocking.
|
|
int bytes_sent = socket_ops::send(impl.socket_, bufs, i, flags, ec);
|
|
|
|
// Check if operation succeeded.
|
|
if (bytes_sent >= 0)
|
|
return bytes_sent;
|
|
|
|
// Operation failed.
|
|
if ((impl.flags_ & implementation_type::user_set_non_blocking)
|
|
|| (ec != asio::error::would_block
|
|
&& ec != asio::error::try_again))
|
|
return 0;
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_write(impl.socket_, ec) < 0)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// Wait until data can be sent without blocking.
|
|
size_t send(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
socket_ops::poll_write(impl.socket_, ec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
template <typename ConstBufferSequence, typename Handler>
|
|
class send_operation :
|
|
public handler_base_from_member<Handler>
|
|
{
|
|
public:
|
|
send_operation(socket_type socket, asio::io_service& io_service,
|
|
const ConstBufferSequence& buffers, socket_base::message_flags flags,
|
|
Handler handler)
|
|
: handler_base_from_member<Handler>(handler),
|
|
socket_(socket),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
buffers_(buffers),
|
|
flags_(flags)
|
|
{
|
|
}
|
|
|
|
bool perform(asio::error_code& ec,
|
|
std::size_t& bytes_transferred)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (ec)
|
|
{
|
|
bytes_transferred = 0;
|
|
return true;
|
|
}
|
|
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename ConstBufferSequence::const_iterator iter = buffers_.begin();
|
|
typename ConstBufferSequence::const_iterator end = buffers_.end();
|
|
size_t i = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
socket_ops::init_buf(bufs[i],
|
|
asio::buffer_cast<const void*>(buffer),
|
|
asio::buffer_size(buffer));
|
|
}
|
|
|
|
// Send the data.
|
|
int bytes = socket_ops::send(socket_, bufs, i, flags_, ec);
|
|
|
|
// Check if we need to run the operation again.
|
|
if (ec == asio::error::would_block
|
|
|| ec == asio::error::try_again)
|
|
return false;
|
|
|
|
bytes_transferred = (bytes < 0 ? 0 : bytes);
|
|
return true;
|
|
}
|
|
|
|
void complete(const asio::error_code& ec,
|
|
std::size_t bytes_transferred)
|
|
{
|
|
io_service_.post(bind_handler(this->handler_, ec, bytes_transferred));
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
ConstBufferSequence buffers_;
|
|
socket_base::message_flags flags_;
|
|
};
|
|
|
|
// Start an asynchronous send. The data being sent must be valid for the
|
|
// lifetime of the asynchronous operation.
|
|
template <typename ConstBufferSequence, typename Handler>
|
|
void async_send(implementation_type& impl, const ConstBufferSequence& buffers,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else
|
|
{
|
|
if (impl.protocol_.type() == SOCK_STREAM)
|
|
{
|
|
// Determine total size of buffers.
|
|
typename ConstBufferSequence::const_iterator iter = buffers.begin();
|
|
typename ConstBufferSequence::const_iterator end = buffers.end();
|
|
size_t i = 0;
|
|
size_t total_buffer_size = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
total_buffer_size += asio::buffer_size(buffer);
|
|
}
|
|
|
|
// A request to receive 0 bytes on a stream socket is a no-op.
|
|
if (total_buffer_size == 0)
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error_code(), 0));
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
if (!(impl.flags_ & implementation_type::non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
asio::error_code ec;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler, ec, 0));
|
|
return;
|
|
}
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
reactor_.start_write_op(impl.socket_, impl.reactor_data_,
|
|
send_operation<ConstBufferSequence, Handler>(
|
|
impl.socket_, this->get_io_service(), buffers, flags, handler));
|
|
}
|
|
}
|
|
|
|
template <typename Handler>
|
|
class null_buffers_operation :
|
|
public handler_base_from_member<Handler>
|
|
{
|
|
public:
|
|
null_buffers_operation(asio::io_service& io_service, Handler handler)
|
|
: handler_base_from_member<Handler>(handler),
|
|
work_(io_service)
|
|
{
|
|
}
|
|
|
|
bool perform(asio::error_code&,
|
|
std::size_t& bytes_transferred)
|
|
{
|
|
bytes_transferred = 0;
|
|
return true;
|
|
}
|
|
|
|
void complete(const asio::error_code& ec,
|
|
std::size_t bytes_transferred)
|
|
{
|
|
work_.get_io_service().post(bind_handler(
|
|
this->handler_, ec, bytes_transferred));
|
|
}
|
|
|
|
private:
|
|
asio::io_service::work work_;
|
|
};
|
|
|
|
// Start an asynchronous wait until data can be sent without blocking.
|
|
template <typename Handler>
|
|
void async_send(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else
|
|
{
|
|
reactor_.start_write_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler),
|
|
false);
|
|
}
|
|
}
|
|
|
|
// Send a datagram to the specified endpoint. Returns the number of bytes
|
|
// sent.
|
|
template <typename ConstBufferSequence>
|
|
size_t send_to(implementation_type& impl, const ConstBufferSequence& buffers,
|
|
const endpoint_type& destination, socket_base::message_flags flags,
|
|
asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename ConstBufferSequence::const_iterator iter = buffers.begin();
|
|
typename ConstBufferSequence::const_iterator end = buffers.end();
|
|
size_t i = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
socket_ops::init_buf(bufs[i],
|
|
asio::buffer_cast<const void*>(buffer),
|
|
asio::buffer_size(buffer));
|
|
}
|
|
|
|
// Send the data.
|
|
for (;;)
|
|
{
|
|
// Try to complete the operation without blocking.
|
|
int bytes_sent = socket_ops::sendto(impl.socket_, bufs, i, flags,
|
|
destination.data(), destination.size(), ec);
|
|
|
|
// Check if operation succeeded.
|
|
if (bytes_sent >= 0)
|
|
return bytes_sent;
|
|
|
|
// Operation failed.
|
|
if ((impl.flags_ & implementation_type::user_set_non_blocking)
|
|
|| (ec != asio::error::would_block
|
|
&& ec != asio::error::try_again))
|
|
return 0;
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_write(impl.socket_, ec) < 0)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// Wait until data can be sent without blocking.
|
|
size_t send_to(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags, const endpoint_type&,
|
|
asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
socket_ops::poll_write(impl.socket_, ec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
template <typename ConstBufferSequence, typename Handler>
|
|
class send_to_operation :
|
|
public handler_base_from_member<Handler>
|
|
{
|
|
public:
|
|
send_to_operation(socket_type socket, asio::io_service& io_service,
|
|
const ConstBufferSequence& buffers, const endpoint_type& endpoint,
|
|
socket_base::message_flags flags, Handler handler)
|
|
: handler_base_from_member<Handler>(handler),
|
|
socket_(socket),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
buffers_(buffers),
|
|
destination_(endpoint),
|
|
flags_(flags)
|
|
{
|
|
}
|
|
|
|
bool perform(asio::error_code& ec,
|
|
std::size_t& bytes_transferred)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (ec)
|
|
{
|
|
bytes_transferred = 0;
|
|
return true;
|
|
}
|
|
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename ConstBufferSequence::const_iterator iter = buffers_.begin();
|
|
typename ConstBufferSequence::const_iterator end = buffers_.end();
|
|
size_t i = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::const_buffer buffer(*iter);
|
|
socket_ops::init_buf(bufs[i],
|
|
asio::buffer_cast<const void*>(buffer),
|
|
asio::buffer_size(buffer));
|
|
}
|
|
|
|
// Send the data.
|
|
int bytes = socket_ops::sendto(socket_, bufs, i, flags_,
|
|
destination_.data(), destination_.size(), ec);
|
|
|
|
// Check if we need to run the operation again.
|
|
if (ec == asio::error::would_block
|
|
|| ec == asio::error::try_again)
|
|
return false;
|
|
|
|
bytes_transferred = (bytes < 0 ? 0 : bytes);
|
|
return true;
|
|
}
|
|
|
|
void complete(const asio::error_code& ec,
|
|
std::size_t bytes_transferred)
|
|
{
|
|
io_service_.post(bind_handler(this->handler_, ec, bytes_transferred));
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
ConstBufferSequence buffers_;
|
|
endpoint_type destination_;
|
|
socket_base::message_flags flags_;
|
|
};
|
|
|
|
// Start an asynchronous send. The data being sent must be valid for the
|
|
// lifetime of the asynchronous operation.
|
|
template <typename ConstBufferSequence, typename Handler>
|
|
void async_send_to(implementation_type& impl,
|
|
const ConstBufferSequence& buffers,
|
|
const endpoint_type& destination, socket_base::message_flags flags,
|
|
Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else
|
|
{
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
if (!(impl.flags_ & implementation_type::non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
asio::error_code ec;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler, ec, 0));
|
|
return;
|
|
}
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
reactor_.start_write_op(impl.socket_, impl.reactor_data_,
|
|
send_to_operation<ConstBufferSequence, Handler>(
|
|
impl.socket_, this->get_io_service(), buffers,
|
|
destination, flags, handler));
|
|
}
|
|
}
|
|
|
|
// Start an asynchronous wait until data can be sent without blocking.
|
|
template <typename Handler>
|
|
void async_send_to(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags, const endpoint_type&, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else
|
|
{
|
|
reactor_.start_write_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler),
|
|
false);
|
|
}
|
|
}
|
|
|
|
// Receive some data from the peer. Returns the number of bytes received.
|
|
template <typename MutableBufferSequence>
|
|
size_t receive(implementation_type& impl,
|
|
const MutableBufferSequence& buffers,
|
|
socket_base::message_flags flags, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename MutableBufferSequence::const_iterator iter = buffers.begin();
|
|
typename MutableBufferSequence::const_iterator end = buffers.end();
|
|
size_t i = 0;
|
|
size_t total_buffer_size = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
socket_ops::init_buf(bufs[i],
|
|
asio::buffer_cast<void*>(buffer),
|
|
asio::buffer_size(buffer));
|
|
total_buffer_size += asio::buffer_size(buffer);
|
|
}
|
|
|
|
// A request to receive 0 bytes on a stream socket is a no-op.
|
|
if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
|
|
{
|
|
ec = asio::error_code();
|
|
return 0;
|
|
}
|
|
|
|
// Receive some data.
|
|
for (;;)
|
|
{
|
|
// Try to complete the operation without blocking.
|
|
int bytes_recvd = socket_ops::recv(impl.socket_, bufs, i, flags, ec);
|
|
|
|
// Check if operation succeeded.
|
|
if (bytes_recvd > 0)
|
|
return bytes_recvd;
|
|
|
|
// Check for EOF.
|
|
if (bytes_recvd == 0 && impl.protocol_.type() == SOCK_STREAM)
|
|
{
|
|
ec = asio::error::eof;
|
|
return 0;
|
|
}
|
|
|
|
// Operation failed.
|
|
if ((impl.flags_ & implementation_type::user_set_non_blocking)
|
|
|| (ec != asio::error::would_block
|
|
&& ec != asio::error::try_again))
|
|
return 0;
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_read(impl.socket_, ec) < 0)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// Wait until data can be received without blocking.
|
|
size_t receive(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
socket_ops::poll_read(impl.socket_, ec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
template <typename MutableBufferSequence, typename Handler>
|
|
class receive_operation :
|
|
public handler_base_from_member<Handler>
|
|
{
|
|
public:
|
|
receive_operation(socket_type socket, int protocol_type,
|
|
asio::io_service& io_service,
|
|
const MutableBufferSequence& buffers,
|
|
socket_base::message_flags flags, Handler handler)
|
|
: handler_base_from_member<Handler>(handler),
|
|
socket_(socket),
|
|
protocol_type_(protocol_type),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
buffers_(buffers),
|
|
flags_(flags)
|
|
{
|
|
}
|
|
|
|
bool perform(asio::error_code& ec,
|
|
std::size_t& bytes_transferred)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (ec)
|
|
{
|
|
bytes_transferred = 0;
|
|
return true;
|
|
}
|
|
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename MutableBufferSequence::const_iterator iter = buffers_.begin();
|
|
typename MutableBufferSequence::const_iterator end = buffers_.end();
|
|
size_t i = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
socket_ops::init_buf(bufs[i],
|
|
asio::buffer_cast<void*>(buffer),
|
|
asio::buffer_size(buffer));
|
|
}
|
|
|
|
// Receive some data.
|
|
int bytes = socket_ops::recv(socket_, bufs, i, flags_, ec);
|
|
if (bytes == 0 && protocol_type_ == SOCK_STREAM)
|
|
ec = asio::error::eof;
|
|
|
|
// Check if we need to run the operation again.
|
|
if (ec == asio::error::would_block
|
|
|| ec == asio::error::try_again)
|
|
return false;
|
|
|
|
bytes_transferred = (bytes < 0 ? 0 : bytes);
|
|
return true;
|
|
}
|
|
|
|
void complete(const asio::error_code& ec,
|
|
std::size_t bytes_transferred)
|
|
{
|
|
io_service_.post(bind_handler(this->handler_, ec, bytes_transferred));
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
int protocol_type_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
MutableBufferSequence buffers_;
|
|
socket_base::message_flags flags_;
|
|
};
|
|
|
|
// Start an asynchronous receive. The buffer for the data being received
|
|
// must be valid for the lifetime of the asynchronous operation.
|
|
template <typename MutableBufferSequence, typename Handler>
|
|
void async_receive(implementation_type& impl,
|
|
const MutableBufferSequence& buffers,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else
|
|
{
|
|
if (impl.protocol_.type() == SOCK_STREAM)
|
|
{
|
|
// Determine total size of buffers.
|
|
typename MutableBufferSequence::const_iterator iter = buffers.begin();
|
|
typename MutableBufferSequence::const_iterator end = buffers.end();
|
|
size_t i = 0;
|
|
size_t total_buffer_size = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
total_buffer_size += asio::buffer_size(buffer);
|
|
}
|
|
|
|
// A request to receive 0 bytes on a stream socket is a no-op.
|
|
if (total_buffer_size == 0)
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error_code(), 0));
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
if (!(impl.flags_ & implementation_type::non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
asio::error_code ec;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler, ec, 0));
|
|
return;
|
|
}
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
if (flags & socket_base::message_out_of_band)
|
|
{
|
|
reactor_.start_except_op(impl.socket_, impl.reactor_data_,
|
|
receive_operation<MutableBufferSequence, Handler>(
|
|
impl.socket_, impl.protocol_.type(),
|
|
this->get_io_service(), buffers, flags, handler));
|
|
}
|
|
else
|
|
{
|
|
reactor_.start_read_op(impl.socket_, impl.reactor_data_,
|
|
receive_operation<MutableBufferSequence, Handler>(
|
|
impl.socket_, impl.protocol_.type(),
|
|
this->get_io_service(), buffers, flags, handler));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Wait until data can be received without blocking.
|
|
template <typename Handler>
|
|
void async_receive(implementation_type& impl, const null_buffers&,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else if (flags & socket_base::message_out_of_band)
|
|
{
|
|
reactor_.start_except_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler));
|
|
}
|
|
else
|
|
{
|
|
reactor_.start_read_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler),
|
|
false);
|
|
}
|
|
}
|
|
|
|
// Receive a datagram with the endpoint of the sender. Returns the number of
|
|
// bytes received.
|
|
template <typename MutableBufferSequence>
|
|
size_t receive_from(implementation_type& impl,
|
|
const MutableBufferSequence& buffers,
|
|
endpoint_type& sender_endpoint, socket_base::message_flags flags,
|
|
asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename MutableBufferSequence::const_iterator iter = buffers.begin();
|
|
typename MutableBufferSequence::const_iterator end = buffers.end();
|
|
size_t i = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
socket_ops::init_buf(bufs[i],
|
|
asio::buffer_cast<void*>(buffer),
|
|
asio::buffer_size(buffer));
|
|
}
|
|
|
|
// Receive some data.
|
|
for (;;)
|
|
{
|
|
// Try to complete the operation without blocking.
|
|
std::size_t addr_len = sender_endpoint.capacity();
|
|
int bytes_recvd = socket_ops::recvfrom(impl.socket_, bufs, i, flags,
|
|
sender_endpoint.data(), &addr_len, ec);
|
|
|
|
// Check if operation succeeded.
|
|
if (bytes_recvd > 0)
|
|
{
|
|
sender_endpoint.resize(addr_len);
|
|
return bytes_recvd;
|
|
}
|
|
|
|
// Check for EOF.
|
|
if (bytes_recvd == 0 && impl.protocol_.type() == SOCK_STREAM)
|
|
{
|
|
ec = asio::error::eof;
|
|
return 0;
|
|
}
|
|
|
|
// Operation failed.
|
|
if ((impl.flags_ & implementation_type::user_set_non_blocking)
|
|
|| (ec != asio::error::would_block
|
|
&& ec != asio::error::try_again))
|
|
return 0;
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_read(impl.socket_, ec) < 0)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// Wait until data can be received without blocking.
|
|
size_t receive_from(implementation_type& impl, const null_buffers&,
|
|
endpoint_type& sender_endpoint, socket_base::message_flags,
|
|
asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
socket_ops::poll_read(impl.socket_, ec);
|
|
|
|
// Reset endpoint since it can be given no sensible value at this time.
|
|
sender_endpoint = endpoint_type();
|
|
|
|
return 0;
|
|
}
|
|
|
|
template <typename MutableBufferSequence, typename Handler>
|
|
class receive_from_operation :
|
|
public handler_base_from_member<Handler>
|
|
{
|
|
public:
|
|
receive_from_operation(socket_type socket, int protocol_type,
|
|
asio::io_service& io_service,
|
|
const MutableBufferSequence& buffers, endpoint_type& endpoint,
|
|
socket_base::message_flags flags, Handler handler)
|
|
: handler_base_from_member<Handler>(handler),
|
|
socket_(socket),
|
|
protocol_type_(protocol_type),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
buffers_(buffers),
|
|
sender_endpoint_(endpoint),
|
|
flags_(flags)
|
|
{
|
|
}
|
|
|
|
bool perform(asio::error_code& ec,
|
|
std::size_t& bytes_transferred)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (ec)
|
|
{
|
|
bytes_transferred = 0;
|
|
return true;
|
|
}
|
|
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename MutableBufferSequence::const_iterator iter = buffers_.begin();
|
|
typename MutableBufferSequence::const_iterator end = buffers_.end();
|
|
size_t i = 0;
|
|
for (; iter != end && i < max_buffers; ++iter, ++i)
|
|
{
|
|
asio::mutable_buffer buffer(*iter);
|
|
socket_ops::init_buf(bufs[i],
|
|
asio::buffer_cast<void*>(buffer),
|
|
asio::buffer_size(buffer));
|
|
}
|
|
|
|
// Receive some data.
|
|
std::size_t addr_len = sender_endpoint_.capacity();
|
|
int bytes = socket_ops::recvfrom(socket_, bufs, i, flags_,
|
|
sender_endpoint_.data(), &addr_len, ec);
|
|
if (bytes == 0 && protocol_type_ == SOCK_STREAM)
|
|
ec = asio::error::eof;
|
|
|
|
// Check if we need to run the operation again.
|
|
if (ec == asio::error::would_block
|
|
|| ec == asio::error::try_again)
|
|
return false;
|
|
|
|
sender_endpoint_.resize(addr_len);
|
|
bytes_transferred = (bytes < 0 ? 0 : bytes);
|
|
return true;
|
|
}
|
|
|
|
void complete(const asio::error_code& ec,
|
|
std::size_t bytes_transferred)
|
|
{
|
|
io_service_.post(bind_handler(this->handler_, ec, bytes_transferred));
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
int protocol_type_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
MutableBufferSequence buffers_;
|
|
endpoint_type& sender_endpoint_;
|
|
socket_base::message_flags flags_;
|
|
};
|
|
|
|
// Start an asynchronous receive. The buffer for the data being received and
|
|
// the sender_endpoint object must both be valid for the lifetime of the
|
|
// asynchronous operation.
|
|
template <typename MutableBufferSequence, typename Handler>
|
|
void async_receive_from(implementation_type& impl,
|
|
const MutableBufferSequence& buffers, endpoint_type& sender_endpoint,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else
|
|
{
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
if (!(impl.flags_ & implementation_type::non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
asio::error_code ec;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler, ec, 0));
|
|
return;
|
|
}
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
reactor_.start_read_op(impl.socket_, impl.reactor_data_,
|
|
receive_from_operation<MutableBufferSequence, Handler>(
|
|
impl.socket_, impl.protocol_.type(), this->get_io_service(),
|
|
buffers, sender_endpoint, flags, handler));
|
|
}
|
|
}
|
|
|
|
// Wait until data can be received without blocking.
|
|
template <typename Handler>
|
|
void async_receive_from(implementation_type& impl,
|
|
const null_buffers&, endpoint_type& sender_endpoint,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor, 0));
|
|
}
|
|
else
|
|
{
|
|
// Reset endpoint since it can be given no sensible value at this time.
|
|
sender_endpoint = endpoint_type();
|
|
|
|
if (flags & socket_base::message_out_of_band)
|
|
{
|
|
reactor_.start_except_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler));
|
|
}
|
|
else
|
|
{
|
|
reactor_.start_read_op(impl.socket_, impl.reactor_data_,
|
|
null_buffers_operation<Handler>(this->get_io_service(), handler),
|
|
false);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Accept a new connection.
|
|
template <typename Socket>
|
|
asio::error_code accept(implementation_type& impl,
|
|
Socket& peer, endpoint_type* peer_endpoint, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return ec;
|
|
}
|
|
|
|
// We cannot accept a socket that is already open.
|
|
if (peer.is_open())
|
|
{
|
|
ec = asio::error::already_open;
|
|
return ec;
|
|
}
|
|
|
|
// Accept a socket.
|
|
for (;;)
|
|
{
|
|
// Try to complete the operation without blocking.
|
|
asio::error_code ec;
|
|
socket_holder new_socket;
|
|
std::size_t addr_len = 0;
|
|
if (peer_endpoint)
|
|
{
|
|
addr_len = peer_endpoint->capacity();
|
|
new_socket.reset(socket_ops::accept(impl.socket_,
|
|
peer_endpoint->data(), &addr_len, ec));
|
|
}
|
|
else
|
|
{
|
|
new_socket.reset(socket_ops::accept(impl.socket_, 0, 0, ec));
|
|
}
|
|
|
|
// Check if operation succeeded.
|
|
if (new_socket.get() >= 0)
|
|
{
|
|
if (peer_endpoint)
|
|
peer_endpoint->resize(addr_len);
|
|
peer.assign(impl.protocol_, new_socket.get(), ec);
|
|
if (!ec)
|
|
new_socket.release();
|
|
return ec;
|
|
}
|
|
|
|
// Operation failed.
|
|
if (ec == asio::error::would_block
|
|
|| ec == asio::error::try_again)
|
|
{
|
|
if (impl.flags_ & implementation_type::user_set_non_blocking)
|
|
return ec;
|
|
// Fall through to retry operation.
|
|
}
|
|
else if (ec == asio::error::connection_aborted)
|
|
{
|
|
if (impl.flags_ & implementation_type::enable_connection_aborted)
|
|
return ec;
|
|
// Fall through to retry operation.
|
|
}
|
|
#if defined(EPROTO)
|
|
else if (ec.value() == EPROTO)
|
|
{
|
|
if (impl.flags_ & implementation_type::enable_connection_aborted)
|
|
return ec;
|
|
// Fall through to retry operation.
|
|
}
|
|
#endif // defined(EPROTO)
|
|
else
|
|
return ec;
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_read(impl.socket_, ec) < 0)
|
|
return ec;
|
|
}
|
|
}
|
|
|
|
template <typename Socket, typename Handler>
|
|
class accept_operation :
|
|
public handler_base_from_member<Handler>
|
|
{
|
|
public:
|
|
accept_operation(socket_type socket, asio::io_service& io_service,
|
|
Socket& peer, const protocol_type& protocol,
|
|
endpoint_type* peer_endpoint, bool enable_connection_aborted,
|
|
Handler handler)
|
|
: handler_base_from_member<Handler>(handler),
|
|
socket_(socket),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
peer_(peer),
|
|
protocol_(protocol),
|
|
peer_endpoint_(peer_endpoint),
|
|
enable_connection_aborted_(enable_connection_aborted)
|
|
{
|
|
}
|
|
|
|
bool perform(asio::error_code& ec, std::size_t&)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (ec)
|
|
return true;
|
|
|
|
// Accept the waiting connection.
|
|
socket_holder new_socket;
|
|
std::size_t addr_len = 0;
|
|
if (peer_endpoint_)
|
|
{
|
|
addr_len = peer_endpoint_->capacity();
|
|
new_socket.reset(socket_ops::accept(socket_,
|
|
peer_endpoint_->data(), &addr_len, ec));
|
|
}
|
|
else
|
|
{
|
|
new_socket.reset(socket_ops::accept(socket_, 0, 0, ec));
|
|
}
|
|
|
|
// Check if we need to run the operation again.
|
|
if (ec == asio::error::would_block
|
|
|| ec == asio::error::try_again)
|
|
return false;
|
|
if (ec == asio::error::connection_aborted
|
|
&& !enable_connection_aborted_)
|
|
return false;
|
|
#if defined(EPROTO)
|
|
if (ec.value() == EPROTO && !enable_connection_aborted_)
|
|
return false;
|
|
#endif // defined(EPROTO)
|
|
|
|
// Transfer ownership of the new socket to the peer object.
|
|
if (!ec)
|
|
{
|
|
if (peer_endpoint_)
|
|
peer_endpoint_->resize(addr_len);
|
|
peer_.assign(protocol_, new_socket.get(), ec);
|
|
if (!ec)
|
|
new_socket.release();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void complete(const asio::error_code& ec, std::size_t)
|
|
{
|
|
io_service_.post(bind_handler(this->handler_, ec));
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
Socket& peer_;
|
|
protocol_type protocol_;
|
|
endpoint_type* peer_endpoint_;
|
|
bool enable_connection_aborted_;
|
|
};
|
|
|
|
// Start an asynchronous accept. The peer and peer_endpoint objects
|
|
// must be valid until the accept's handler is invoked.
|
|
template <typename Socket, typename Handler>
|
|
void async_accept(implementation_type& impl, Socket& peer,
|
|
endpoint_type* peer_endpoint, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor));
|
|
}
|
|
else if (peer.is_open())
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::already_open));
|
|
}
|
|
else
|
|
{
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
if (!(impl.flags_ & implementation_type::non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
asio::error_code ec;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler, ec));
|
|
return;
|
|
}
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
reactor_.start_read_op(impl.socket_, impl.reactor_data_,
|
|
accept_operation<Socket, Handler>(
|
|
impl.socket_, this->get_io_service(),
|
|
peer, impl.protocol_, peer_endpoint,
|
|
(impl.flags_ & implementation_type::enable_connection_aborted) != 0,
|
|
handler));
|
|
}
|
|
}
|
|
|
|
// Connect the socket to the specified endpoint.
|
|
asio::error_code connect(implementation_type& impl,
|
|
const endpoint_type& peer_endpoint, asio::error_code& ec)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
ec = asio::error::bad_descriptor;
|
|
return ec;
|
|
}
|
|
|
|
// Perform the connect operation.
|
|
socket_ops::connect(impl.socket_,
|
|
peer_endpoint.data(), peer_endpoint.size(), ec);
|
|
if (ec != asio::error::in_progress
|
|
&& ec != asio::error::would_block)
|
|
{
|
|
// The connect operation finished immediately.
|
|
return ec;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_connect(impl.socket_, ec) < 0)
|
|
return ec;
|
|
|
|
// Get the error code from the connect operation.
|
|
int connect_error = 0;
|
|
size_t connect_error_len = sizeof(connect_error);
|
|
if (socket_ops::getsockopt(impl.socket_, SOL_SOCKET, SO_ERROR,
|
|
&connect_error, &connect_error_len, ec) == socket_error_retval)
|
|
return ec;
|
|
|
|
// Return the result of the connect operation.
|
|
ec = asio::error_code(connect_error,
|
|
asio::error::get_system_category());
|
|
return ec;
|
|
}
|
|
|
|
template <typename Handler>
|
|
class connect_operation :
|
|
public handler_base_from_member<Handler>
|
|
{
|
|
public:
|
|
connect_operation(socket_type socket,
|
|
asio::io_service& io_service, Handler handler)
|
|
: handler_base_from_member<Handler>(handler),
|
|
socket_(socket),
|
|
io_service_(io_service),
|
|
work_(io_service)
|
|
{
|
|
}
|
|
|
|
bool perform(asio::error_code& ec, std::size_t&)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (ec)
|
|
return true;
|
|
|
|
// Get the error code from the connect operation.
|
|
int connect_error = 0;
|
|
size_t connect_error_len = sizeof(connect_error);
|
|
if (socket_ops::getsockopt(socket_, SOL_SOCKET, SO_ERROR,
|
|
&connect_error, &connect_error_len, ec) == socket_error_retval)
|
|
return true;
|
|
|
|
// The connection failed so the handler will be posted with an error code.
|
|
if (connect_error)
|
|
{
|
|
ec = asio::error_code(connect_error,
|
|
asio::error::get_system_category());
|
|
return true;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void complete(const asio::error_code& ec, std::size_t)
|
|
{
|
|
io_service_.post(bind_handler(this->handler_, ec));
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
};
|
|
|
|
// Start an asynchronous connect.
|
|
template <typename Handler>
|
|
void async_connect(implementation_type& impl,
|
|
const endpoint_type& peer_endpoint, Handler handler)
|
|
{
|
|
if (!is_open(impl))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error::bad_descriptor));
|
|
return;
|
|
}
|
|
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
if (!(impl.flags_ & implementation_type::non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
asio::error_code ec;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec))
|
|
{
|
|
this->get_io_service().post(bind_handler(handler, ec));
|
|
return;
|
|
}
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
// Start the connect operation. The socket is already marked as non-blocking
|
|
// so the connection will take place asynchronously.
|
|
asio::error_code ec;
|
|
if (socket_ops::connect(impl.socket_, peer_endpoint.data(),
|
|
peer_endpoint.size(), ec) == 0)
|
|
{
|
|
// The connect operation has finished successfully so we need to post the
|
|
// handler immediately.
|
|
this->get_io_service().post(bind_handler(handler,
|
|
asio::error_code()));
|
|
}
|
|
else if (ec == asio::error::in_progress
|
|
|| ec == asio::error::would_block)
|
|
{
|
|
// The connection is happening in the background, and we need to wait
|
|
// until the socket becomes writeable.
|
|
reactor_.start_connect_op(impl.socket_, impl.reactor_data_,
|
|
connect_operation<Handler>(impl.socket_,
|
|
this->get_io_service(), handler));
|
|
}
|
|
else
|
|
{
|
|
// The connect operation has failed, so post the handler immediately.
|
|
this->get_io_service().post(bind_handler(handler, ec));
|
|
}
|
|
}
|
|
|
|
private:
|
|
// The selector that performs event demultiplexing for the service.
|
|
Reactor& reactor_;
|
|
};
|
|
|
|
} // namespace detail
|
|
} // namespace asio
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#endif // ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP
|