1641 lines
49 KiB
C++
1641 lines
49 KiB
C++
//
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// reactive_socket_service.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2006 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/error_handler.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/noncopyable.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::io_service::service
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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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user_set_non_blocking = 1, // The user wants a non-blocking socket.
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internal_non_blocking = 2, // The socket has been set non-blocking.
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enable_connection_aborted = 4, // User wants connection_aborted errors.
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user_set_linger = 8 // The user set the linger option.
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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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};
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// The maximum number of buffers to support in a single operation.
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enum { max_buffers = 16 };
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// Constructor.
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reactive_socket_service(asio::io_service& io_service)
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: asio::io_service::service(io_service),
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reactor_(asio::use_service<Reactor>(io_service))
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{
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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_);
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if (impl.flags_ & implementation_type::internal_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);
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impl.flags_ &= ~implementation_type::internal_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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socket_ops::setsockopt(impl.socket_,
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SOL_SOCKET, SO_LINGER, &opt, sizeof(opt));
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}
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socket_ops::close(impl.socket_);
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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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template <typename Error_Handler>
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void open(implementation_type& impl, const protocol_type& protocol,
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Error_Handler error_handler)
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{
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close(impl, asio::ignore_error());
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socket_holder sock(socket_ops::socket(protocol.family(),
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protocol.type(), protocol.protocol()));
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if (sock.get() == invalid_socket)
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{
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error_handler(asio::error(socket_ops::get_error()));
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return;
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}
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if (int err = reactor_.register_descriptor(sock.get()))
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{
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error_handler(asio::error(err));
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return;
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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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error_handler(asio::error(0));
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}
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// Assign a native socket to a socket implementation.
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template <typename Error_Handler>
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void assign(implementation_type& impl, const protocol_type& protocol,
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const native_type& native_socket, Error_Handler error_handler)
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{
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close(impl, asio::ignore_error());
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if (int err = reactor_.register_descriptor(native_socket))
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{
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error_handler(asio::error(err));
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return;
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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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error_handler(asio::error(0));
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}
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// Destroy a socket implementation.
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template <typename Error_Handler>
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void close(implementation_type& impl, Error_Handler error_handler)
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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_);
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if (impl.flags_ & implementation_type::internal_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);
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impl.flags_ &= ~implementation_type::internal_non_blocking;
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}
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if (socket_ops::close(impl.socket_) == socket_error_retval)
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{
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error_handler(asio::error(socket_ops::get_error()));
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return;
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}
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impl.socket_ = invalid_socket;
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}
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error_handler(asio::error(0));
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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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template <typename Error_Handler>
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void cancel(implementation_type& impl, Error_Handler error_handler)
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{
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if (impl.socket_ == invalid_socket)
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{
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asio::error error(asio::error::bad_descriptor);
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error_handler(error);
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}
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else
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{
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reactor_.cancel_ops(impl.socket_);
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error_handler(asio::error(0));
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}
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}
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// Bind the socket to the specified local endpoint.
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template <typename Error_Handler>
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void bind(implementation_type& impl, const endpoint_type& endpoint,
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Error_Handler error_handler)
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{
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if (socket_ops::bind(impl.socket_, endpoint.data(),
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endpoint.size()) == socket_error_retval)
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error_handler(asio::error(socket_ops::get_error()));
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else
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error_handler(asio::error(0));
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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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template <typename Error_Handler>
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void listen(implementation_type& impl, int backlog,
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Error_Handler error_handler)
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{
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if (socket_ops::listen(impl.socket_, backlog) == socket_error_retval)
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error_handler(asio::error(socket_ops::get_error()));
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else
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error_handler(asio::error(0));
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}
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// Set a socket option.
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template <typename Option, typename Error_Handler>
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void set_option(implementation_type& impl, const Option& option,
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Error_Handler error_handler)
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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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error_handler(asio::error(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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error_handler(asio::error(0));
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}
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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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if (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_)))
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error_handler(asio::error(socket_ops::get_error()));
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else
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error_handler(asio::error(0));
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}
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}
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// Set a socket option.
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template <typename Option, typename Error_Handler>
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void get_option(const implementation_type& impl, Option& option,
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Error_Handler error_handler) const
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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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error_handler(asio::error(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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error_handler(asio::error(0));
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}
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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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if (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))
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error_handler(asio::error(socket_ops::get_error()));
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else
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error_handler(asio::error(0));
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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, typename Error_Handler>
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void io_control(implementation_type& impl, IO_Control_Command& command,
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Error_Handler error_handler)
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{
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if (command.name() == static_cast<int>(FIONBIO))
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{
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if (command.get())
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impl.flags_ |= implementation_type::user_set_non_blocking;
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else
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impl.flags_ &= ~implementation_type::user_set_non_blocking;
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error_handler(asio::error(0));
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}
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else
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{
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if (socket_ops::ioctl(impl.socket_, command.name(),
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static_cast<ioctl_arg_type*>(command.data())))
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error_handler(asio::error(socket_ops::get_error()));
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else
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error_handler(asio::error(0));
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}
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}
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// Get the local endpoint.
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template <typename Error_Handler>
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void get_local_endpoint(const implementation_type& impl,
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endpoint_type& endpoint, Error_Handler error_handler) const
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{
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socket_addr_len_type addr_len = endpoint.capacity();
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if (socket_ops::getsockname(impl.socket_, endpoint.data(), &addr_len))
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{
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error_handler(asio::error(socket_ops::get_error()));
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return;
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}
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endpoint.resize(addr_len);
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error_handler(asio::error(0));
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}
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// Get the remote endpoint.
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template <typename Error_Handler>
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void get_remote_endpoint(const implementation_type& impl,
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endpoint_type& endpoint, Error_Handler error_handler) const
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{
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socket_addr_len_type addr_len = endpoint.capacity();
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if (socket_ops::getpeername(impl.socket_, endpoint.data(), &addr_len))
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{
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error_handler(asio::error(socket_ops::get_error()));
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return;
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}
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endpoint.resize(addr_len);
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error_handler(asio::error(0));
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}
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/// Disable sends or receives on the socket.
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template <typename Error_Handler>
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void shutdown(implementation_type& impl, socket_base::shutdown_type what,
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Error_Handler error_handler)
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{
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if (socket_ops::shutdown(impl.socket_, what) != 0)
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error_handler(asio::error(socket_ops::get_error()));
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else
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error_handler(asio::error(0));
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}
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// Send the given data to the peer.
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template <typename Const_Buffers, typename Error_Handler>
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size_t send(implementation_type& impl, const Const_Buffers& buffers,
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socket_base::message_flags flags, Error_Handler error_handler)
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{
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// Copy buffers into array.
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socket_ops::buf bufs[max_buffers];
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typename Const_Buffers::const_iterator iter = buffers.begin();
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typename Const_Buffers::const_iterator end = buffers.end();
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size_t i = 0;
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size_t total_buffer_size = 0;
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for (; iter != end && i < max_buffers; ++iter, ++i)
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{
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asio::const_buffer buffer(*iter);
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socket_ops::init_buf(bufs[i],
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asio::buffer_cast<const void*>(buffer),
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asio::buffer_size(buffer));
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total_buffer_size += asio::buffer_size(buffer);
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}
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// A request to receive 0 bytes on a stream socket is a no-op.
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if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
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{
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error_handler(asio::error(0));
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return 0;
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}
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// Send the data.
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for (;;)
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{
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// Try to complete the operation without blocking.
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int bytes_sent = socket_ops::send(impl.socket_, bufs, i, flags);
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int error = socket_ops::get_error();
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// Check if operation succeeded.
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if (bytes_sent >= 0)
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{
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error_handler(asio::error(0));
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return bytes_sent;
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}
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// Operation failed.
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if ((impl.flags_ & implementation_type::user_set_non_blocking)
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|| (error != asio::error::would_block
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&& error != asio::error::try_again))
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{
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error_handler(asio::error(error));
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return 0;
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}
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// Wait for socket to become ready.
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if (socket_ops::poll_write(impl.socket_) < 0)
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{
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error_handler(asio::error(socket_ops::get_error()));
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return 0;
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}
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}
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}
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template <typename Const_Buffers, typename Handler>
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class send_handler
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{
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public:
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send_handler(socket_type socket, asio::io_service& io_service,
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const Const_Buffers& buffers, socket_base::message_flags flags,
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Handler handler)
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: socket_(socket),
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io_service_(io_service),
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work_(io_service),
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buffers_(buffers),
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flags_(flags),
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handler_(handler)
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{
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}
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|
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bool operator()(int result)
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{
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// Check whether the operation was successful.
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if (result != 0)
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{
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asio::error error(result);
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io_service_.post(bind_handler(handler_, error, 0));
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return true;
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}
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|
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// Copy buffers into array.
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socket_ops::buf bufs[max_buffers];
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typename Const_Buffers::const_iterator iter = buffers_.begin();
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typename Const_Buffers::const_iterator end = buffers_.end();
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size_t i = 0;
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for (; iter != end && i < max_buffers; ++iter, ++i)
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{
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asio::const_buffer buffer(*iter);
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socket_ops::init_buf(bufs[i],
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asio::buffer_cast<const void*>(buffer),
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asio::buffer_size(buffer));
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}
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|
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// Send the data.
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int bytes = socket_ops::send(socket_, bufs, i, flags_);
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asio::error error(bytes < 0
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? socket_ops::get_error() : asio::error::success);
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// Check if we need to run the operation again.
|
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if (error == asio::error::would_block
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|| error == asio::error::try_again)
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return false;
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|
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io_service_.post(bind_handler(handler_, error, bytes < 0 ? 0 : bytes));
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return true;
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}
|
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|
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private:
|
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socket_type socket_;
|
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asio::io_service& io_service_;
|
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asio::io_service::work work_;
|
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Const_Buffers buffers_;
|
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socket_base::message_flags flags_;
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Handler handler_;
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};
|
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|
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// Start an asynchronous send. The data being sent must be valid for the
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// lifetime of the asynchronous operation.
|
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template <typename Const_Buffers, typename Handler>
|
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void async_send(implementation_type& impl, const Const_Buffers& buffers,
|
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socket_base::message_flags flags, Handler handler)
|
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{
|
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if (impl.socket_ == invalid_socket)
|
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{
|
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asio::error error(asio::error::bad_descriptor);
|
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io_service().post(bind_handler(handler, error, 0));
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}
|
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else
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{
|
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if (impl.protocol_.type() == SOCK_STREAM)
|
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{
|
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// Determine total size of buffers.
|
|
typename Const_Buffers::const_iterator iter = buffers.begin();
|
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typename Const_Buffers::const_iterator end = buffers.end();
|
|
size_t i = 0;
|
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size_t total_buffer_size = 0;
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for (; iter != end && i < max_buffers; ++iter, ++i)
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{
|
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asio::const_buffer buffer(*iter);
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total_buffer_size += asio::buffer_size(buffer);
|
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}
|
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|
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// A request to receive 0 bytes on a stream socket is a no-op.
|
|
if (total_buffer_size == 0)
|
|
{
|
|
asio::error error(asio::error::success);
|
|
io_service().post(bind_handler(handler, error, 0));
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking))
|
|
{
|
|
asio::error error(socket_ops::get_error());
|
|
io_service().post(bind_handler(handler, error, 0));
|
|
return;
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
reactor_.start_write_op(impl.socket_,
|
|
send_handler<Const_Buffers, Handler>(
|
|
impl.socket_, io_service(), buffers, flags, handler));
|
|
}
|
|
}
|
|
|
|
// Send a datagram to the specified endpoint. Returns the number of bytes
|
|
// sent.
|
|
template <typename Const_Buffers, typename Error_Handler>
|
|
size_t send_to(implementation_type& impl, const Const_Buffers& buffers,
|
|
const endpoint_type& destination, socket_base::message_flags flags,
|
|
Error_Handler error_handler)
|
|
{
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename Const_Buffers::const_iterator iter = buffers.begin();
|
|
typename Const_Buffers::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());
|
|
int error = socket_ops::get_error();
|
|
|
|
// Check if operation succeeded.
|
|
if (bytes_sent >= 0)
|
|
{
|
|
error_handler(asio::error(0));
|
|
return bytes_sent;
|
|
}
|
|
|
|
// Operation failed.
|
|
if ((impl.flags_ & implementation_type::user_set_non_blocking)
|
|
|| (error != asio::error::would_block
|
|
&& error != asio::error::try_again))
|
|
{
|
|
error_handler(asio::error(error));
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_write(impl.socket_) < 0)
|
|
{
|
|
error_handler(asio::error(socket_ops::get_error()));
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
template <typename Const_Buffers, typename Handler>
|
|
class send_to_handler
|
|
{
|
|
public:
|
|
send_to_handler(socket_type socket, asio::io_service& io_service,
|
|
const Const_Buffers& buffers, const endpoint_type& endpoint,
|
|
socket_base::message_flags flags, Handler handler)
|
|
: socket_(socket),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
buffers_(buffers),
|
|
destination_(endpoint),
|
|
flags_(flags),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
bool operator()(int result)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (result != 0)
|
|
{
|
|
asio::error error(result);
|
|
io_service_.post(bind_handler(handler_, error, 0));
|
|
return true;
|
|
}
|
|
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename Const_Buffers::const_iterator iter = buffers_.begin();
|
|
typename Const_Buffers::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());
|
|
asio::error error(bytes < 0
|
|
? socket_ops::get_error() : asio::error::success);
|
|
|
|
// Check if we need to run the operation again.
|
|
if (error == asio::error::would_block
|
|
|| error == asio::error::try_again)
|
|
return false;
|
|
|
|
io_service_.post(bind_handler(handler_, error, bytes < 0 ? 0 : bytes));
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
Const_Buffers buffers_;
|
|
endpoint_type destination_;
|
|
socket_base::message_flags flags_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// Start an asynchronous send. The data being sent must be valid for the
|
|
// lifetime of the asynchronous operation.
|
|
template <typename Const_Buffers, typename Handler>
|
|
void async_send_to(implementation_type& impl, const Const_Buffers& buffers,
|
|
const endpoint_type& destination, socket_base::message_flags flags,
|
|
Handler handler)
|
|
{
|
|
if (impl.socket_ == invalid_socket)
|
|
{
|
|
asio::error error(asio::error::bad_descriptor);
|
|
io_service().post(bind_handler(handler, error, 0));
|
|
}
|
|
else
|
|
{
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking))
|
|
{
|
|
asio::error error(socket_ops::get_error());
|
|
io_service().post(bind_handler(handler, error, 0));
|
|
return;
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
reactor_.start_write_op(impl.socket_,
|
|
send_to_handler<Const_Buffers, Handler>(
|
|
impl.socket_, io_service(), buffers, destination, flags, handler));
|
|
}
|
|
}
|
|
|
|
// Receive some data from the peer. Returns the number of bytes received.
|
|
template <typename Mutable_Buffers, typename Error_Handler>
|
|
size_t receive(implementation_type& impl, const Mutable_Buffers& buffers,
|
|
socket_base::message_flags flags, Error_Handler error_handler)
|
|
{
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename Mutable_Buffers::const_iterator iter = buffers.begin();
|
|
typename Mutable_Buffers::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)
|
|
{
|
|
error_handler(asio::error(0));
|
|
return 0;
|
|
}
|
|
|
|
// Receive some data.
|
|
for (;;)
|
|
{
|
|
// Try to complete the operation without blocking.
|
|
int bytes_recvd = socket_ops::recv(impl.socket_, bufs, i, flags);
|
|
int error = socket_ops::get_error();
|
|
|
|
// Check if operation succeeded.
|
|
if (bytes_recvd > 0)
|
|
{
|
|
error_handler(asio::error(0));
|
|
return bytes_recvd;
|
|
}
|
|
|
|
// Check for EOF.
|
|
if (bytes_recvd == 0)
|
|
{
|
|
error_handler(asio::error(asio::error::eof));
|
|
return 0;
|
|
}
|
|
|
|
// Operation failed.
|
|
if ((impl.flags_ & implementation_type::user_set_non_blocking)
|
|
|| (error != asio::error::would_block
|
|
&& error != asio::error::try_again))
|
|
{
|
|
error_handler(asio::error(error));
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_read(impl.socket_) < 0)
|
|
{
|
|
error_handler(asio::error(socket_ops::get_error()));
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
template <typename Mutable_Buffers, typename Handler>
|
|
class receive_handler
|
|
{
|
|
public:
|
|
receive_handler(socket_type socket, asio::io_service& io_service,
|
|
const Mutable_Buffers& buffers, socket_base::message_flags flags,
|
|
Handler handler)
|
|
: socket_(socket),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
buffers_(buffers),
|
|
flags_(flags),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
bool operator()(int result)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (result != 0)
|
|
{
|
|
asio::error error(result);
|
|
io_service_.post(bind_handler(handler_, error, 0));
|
|
return true;
|
|
}
|
|
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename Mutable_Buffers::const_iterator iter = buffers_.begin();
|
|
typename Mutable_Buffers::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_);
|
|
int error_code = asio::error::success;
|
|
if (bytes < 0)
|
|
error_code = socket_ops::get_error();
|
|
else if (bytes == 0)
|
|
error_code = asio::error::eof;
|
|
asio::error error(error_code);
|
|
|
|
// Check if we need to run the operation again.
|
|
if (error == asio::error::would_block
|
|
|| error == asio::error::try_again)
|
|
return false;
|
|
|
|
io_service_.post(bind_handler(handler_, error, bytes < 0 ? 0 : bytes));
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
Mutable_Buffers buffers_;
|
|
socket_base::message_flags flags_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// Start an asynchronous receive. The buffer for the data being received
|
|
// must be valid for the lifetime of the asynchronous operation.
|
|
template <typename Mutable_Buffers, typename Handler>
|
|
void async_receive(implementation_type& impl, const Mutable_Buffers& buffers,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (impl.socket_ == invalid_socket)
|
|
{
|
|
asio::error error(asio::error::bad_descriptor);
|
|
io_service().post(bind_handler(handler, error, 0));
|
|
}
|
|
else
|
|
{
|
|
if (impl.protocol_.type() == SOCK_STREAM)
|
|
{
|
|
// Determine total size of buffers.
|
|
typename Mutable_Buffers::const_iterator iter = buffers.begin();
|
|
typename Mutable_Buffers::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)
|
|
{
|
|
asio::error error(asio::error::success);
|
|
io_service().post(bind_handler(handler, error, 0));
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking))
|
|
{
|
|
asio::error error(socket_ops::get_error());
|
|
io_service().post(bind_handler(handler, error, 0));
|
|
return;
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
if (flags & socket_base::message_out_of_band)
|
|
{
|
|
reactor_.start_except_op(impl.socket_,
|
|
receive_handler<Mutable_Buffers, Handler>(
|
|
impl.socket_, io_service(), buffers, flags, handler));
|
|
}
|
|
else
|
|
{
|
|
reactor_.start_read_op(impl.socket_,
|
|
receive_handler<Mutable_Buffers, Handler>(
|
|
impl.socket_, io_service(), buffers, flags, handler));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Receive a datagram with the endpoint of the sender. Returns the number of
|
|
// bytes received.
|
|
template <typename Mutable_Buffers, typename Error_Handler>
|
|
size_t receive_from(implementation_type& impl, const Mutable_Buffers& buffers,
|
|
endpoint_type& sender_endpoint, socket_base::message_flags flags,
|
|
Error_Handler error_handler)
|
|
{
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename Mutable_Buffers::const_iterator iter = buffers.begin();
|
|
typename Mutable_Buffers::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.
|
|
socket_addr_len_type addr_len = sender_endpoint.capacity();
|
|
int bytes_recvd = socket_ops::recvfrom(impl.socket_, bufs, i, flags,
|
|
sender_endpoint.data(), &addr_len);
|
|
int error = socket_ops::get_error();
|
|
|
|
// Check if operation succeeded.
|
|
if (bytes_recvd > 0)
|
|
{
|
|
sender_endpoint.resize(addr_len);
|
|
error_handler(asio::error(0));
|
|
return bytes_recvd;
|
|
}
|
|
|
|
// Check for EOF.
|
|
if (bytes_recvd == 0)
|
|
{
|
|
error_handler(asio::error(asio::error::eof));
|
|
return 0;
|
|
}
|
|
|
|
// Operation failed.
|
|
if ((impl.flags_ & implementation_type::user_set_non_blocking)
|
|
|| (error != asio::error::would_block
|
|
&& error != asio::error::try_again))
|
|
{
|
|
error_handler(asio::error(error));
|
|
return 0;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_read(impl.socket_) < 0)
|
|
{
|
|
error_handler(asio::error(socket_ops::get_error()));
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
template <typename Mutable_Buffers, typename Handler>
|
|
class receive_from_handler
|
|
{
|
|
public:
|
|
receive_from_handler(socket_type socket,
|
|
asio::io_service& io_service, const Mutable_Buffers& buffers,
|
|
endpoint_type& endpoint, socket_base::message_flags flags,
|
|
Handler handler)
|
|
: socket_(socket),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
buffers_(buffers),
|
|
sender_endpoint_(endpoint),
|
|
flags_(flags),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
bool operator()(int result)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (result != 0)
|
|
{
|
|
asio::error error(result);
|
|
io_service_.post(bind_handler(handler_, error, 0));
|
|
return true;
|
|
}
|
|
|
|
// Copy buffers into array.
|
|
socket_ops::buf bufs[max_buffers];
|
|
typename Mutable_Buffers::const_iterator iter = buffers_.begin();
|
|
typename Mutable_Buffers::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.
|
|
socket_addr_len_type addr_len = sender_endpoint_.capacity();
|
|
int bytes = socket_ops::recvfrom(socket_, bufs, i, flags_,
|
|
sender_endpoint_.data(), &addr_len);
|
|
int error_code = asio::error::success;
|
|
if (bytes < 0)
|
|
error_code = socket_ops::get_error();
|
|
else if (bytes == 0)
|
|
error_code = asio::error::eof;
|
|
asio::error error(error_code);
|
|
|
|
// Check if we need to run the operation again.
|
|
if (error == asio::error::would_block
|
|
|| error == asio::error::try_again)
|
|
return false;
|
|
|
|
sender_endpoint_.resize(addr_len);
|
|
io_service_.post(bind_handler(handler_, error, bytes < 0 ? 0 : bytes));
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
Mutable_Buffers buffers_;
|
|
endpoint_type& sender_endpoint_;
|
|
socket_base::message_flags flags_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// 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 Mutable_Buffers, typename Handler>
|
|
void async_receive_from(implementation_type& impl,
|
|
const Mutable_Buffers& buffers, endpoint_type& sender_endpoint,
|
|
socket_base::message_flags flags, Handler handler)
|
|
{
|
|
if (impl.socket_ == invalid_socket)
|
|
{
|
|
asio::error error(asio::error::bad_descriptor);
|
|
io_service().post(bind_handler(handler, error, 0));
|
|
}
|
|
else
|
|
{
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking))
|
|
{
|
|
asio::error error(socket_ops::get_error());
|
|
io_service().post(bind_handler(handler, error, 0));
|
|
return;
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
reactor_.start_read_op(impl.socket_,
|
|
receive_from_handler<Mutable_Buffers, Handler>(
|
|
impl.socket_, io_service(), buffers,
|
|
sender_endpoint, flags, handler));
|
|
}
|
|
}
|
|
|
|
// Accept a new connection.
|
|
template <typename Socket, typename Error_Handler>
|
|
void accept(implementation_type& impl, Socket& peer,
|
|
Error_Handler error_handler)
|
|
{
|
|
// We cannot accept a socket that is already open.
|
|
if (peer.native() != invalid_socket)
|
|
{
|
|
error_handler(asio::error(asio::error::already_connected));
|
|
return;
|
|
}
|
|
|
|
// Accept a socket.
|
|
for (;;)
|
|
{
|
|
// Try to complete the operation without blocking.
|
|
socket_holder new_socket(socket_ops::accept(impl.socket_, 0, 0));
|
|
int error = socket_ops::get_error();
|
|
|
|
// Check if operation succeeded.
|
|
if (new_socket.get() >= 0)
|
|
{
|
|
asio::error temp_error;
|
|
peer.assign(impl.protocol_, new_socket.get(),
|
|
asio::assign_error(temp_error));
|
|
if (temp_error)
|
|
{
|
|
error_handler(temp_error);
|
|
}
|
|
else
|
|
{
|
|
new_socket.release();
|
|
error_handler(asio::error(0));
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Operation failed.
|
|
if (error == asio::error::would_block
|
|
|| error == asio::error::try_again)
|
|
{
|
|
if (impl.flags_ & implementation_type::user_set_non_blocking)
|
|
{
|
|
error_handler(asio::error(error));
|
|
return;
|
|
}
|
|
// Fall through to retry operation.
|
|
}
|
|
else if (error == asio::error::connection_aborted)
|
|
{
|
|
if (impl.flags_ & implementation_type::enable_connection_aborted)
|
|
{
|
|
error_handler(asio::error(error));
|
|
return;
|
|
}
|
|
// Fall through to retry operation.
|
|
}
|
|
else
|
|
{
|
|
error_handler(asio::error(error));
|
|
return;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_read(impl.socket_) < 0)
|
|
{
|
|
error_handler(asio::error(socket_ops::get_error()));
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Accept a new connection.
|
|
template <typename Socket, typename Error_Handler>
|
|
void accept_endpoint(implementation_type& impl, Socket& peer,
|
|
endpoint_type& peer_endpoint, Error_Handler error_handler)
|
|
{
|
|
// We cannot accept a socket that is already open.
|
|
if (peer.native() != invalid_socket)
|
|
{
|
|
error_handler(asio::error(asio::error::already_connected));
|
|
return;
|
|
}
|
|
|
|
// Accept a socket.
|
|
for (;;)
|
|
{
|
|
// Try to complete the operation without blocking.
|
|
socket_addr_len_type addr_len = peer_endpoint.capacity();
|
|
socket_holder new_socket(socket_ops::accept(
|
|
impl.socket_, peer_endpoint.data(), &addr_len));
|
|
int error = socket_ops::get_error();
|
|
|
|
// Check if operation succeeded.
|
|
if (new_socket.get() >= 0)
|
|
{
|
|
peer_endpoint.resize(addr_len);
|
|
asio::error temp_error;
|
|
peer.assign(impl.protocol_, new_socket.get(),
|
|
asio::assign_error(temp_error));
|
|
if (temp_error)
|
|
{
|
|
error_handler(temp_error);
|
|
}
|
|
else
|
|
{
|
|
new_socket.release();
|
|
error_handler(asio::error(0));
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Operation failed.
|
|
if (error == asio::error::would_block
|
|
|| error == asio::error::try_again)
|
|
{
|
|
if (impl.flags_ & implementation_type::user_set_non_blocking)
|
|
{
|
|
error_handler(asio::error(error));
|
|
return;
|
|
}
|
|
// Fall through to retry operation.
|
|
}
|
|
else if (error == asio::error::connection_aborted)
|
|
{
|
|
if (impl.flags_ & implementation_type::enable_connection_aborted)
|
|
{
|
|
error_handler(asio::error(error));
|
|
return;
|
|
}
|
|
// Fall through to retry operation.
|
|
}
|
|
else
|
|
{
|
|
error_handler(asio::error(error));
|
|
return;
|
|
}
|
|
|
|
// Wait for socket to become ready.
|
|
if (socket_ops::poll_read(impl.socket_) < 0)
|
|
{
|
|
error_handler(asio::error(socket_ops::get_error()));
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
template <typename Socket, typename Handler>
|
|
class accept_handler
|
|
{
|
|
public:
|
|
accept_handler(socket_type socket, asio::io_service& io_service,
|
|
Socket& peer, const protocol_type& protocol,
|
|
bool enable_connection_aborted, Handler handler)
|
|
: socket_(socket),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
peer_(peer),
|
|
protocol_(protocol),
|
|
enable_connection_aborted_(enable_connection_aborted),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
bool operator()(int result)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (result != 0)
|
|
{
|
|
asio::error error(result);
|
|
io_service_.post(bind_handler(handler_, error));
|
|
return true;
|
|
}
|
|
|
|
// Accept the waiting connection.
|
|
socket_holder new_socket(socket_ops::accept(socket_, 0, 0));
|
|
asio::error error(new_socket.get() == invalid_socket
|
|
? socket_ops::get_error() : asio::error::success);
|
|
|
|
// Check if we need to run the operation again.
|
|
if (error == asio::error::would_block
|
|
|| error == asio::error::try_again)
|
|
return false;
|
|
if (error == asio::error::connection_aborted
|
|
&& !enable_connection_aborted_)
|
|
return false;
|
|
|
|
// Transfer ownership of the new socket to the peer object.
|
|
if (!error)
|
|
{
|
|
peer_.assign(protocol_, new_socket.get(),
|
|
asio::assign_error(error));
|
|
if (!error)
|
|
new_socket.release();
|
|
}
|
|
|
|
io_service_.post(bind_handler(handler_, error));
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
Socket& peer_;
|
|
protocol_type protocol_;
|
|
bool enable_connection_aborted_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// Start an asynchronous accept. The peer object must be valid until the
|
|
// accept's handler is invoked.
|
|
template <typename Socket, typename Handler>
|
|
void async_accept(implementation_type& impl, Socket& peer, Handler handler)
|
|
{
|
|
if (impl.socket_ == invalid_socket)
|
|
{
|
|
asio::error error(asio::error::bad_descriptor);
|
|
io_service().post(bind_handler(handler, error));
|
|
}
|
|
else if (peer.native() != invalid_socket)
|
|
{
|
|
asio::error error(asio::error::already_connected);
|
|
io_service().post(bind_handler(handler, error));
|
|
}
|
|
else
|
|
{
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking))
|
|
{
|
|
asio::error error(socket_ops::get_error());
|
|
io_service().post(bind_handler(handler, error));
|
|
return;
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
reactor_.start_read_op(impl.socket_,
|
|
accept_handler<Socket, Handler>(
|
|
impl.socket_, io_service(), peer, impl.protocol_,
|
|
(impl.flags_ & implementation_type::enable_connection_aborted) != 0,
|
|
handler));
|
|
}
|
|
}
|
|
|
|
template <typename Socket, typename Handler>
|
|
class accept_endp_handler
|
|
{
|
|
public:
|
|
accept_endp_handler(socket_type socket, asio::io_service& io_service,
|
|
Socket& peer, endpoint_type& peer_endpoint,
|
|
bool enable_connection_aborted, Handler handler)
|
|
: socket_(socket),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
peer_(peer),
|
|
peer_endpoint_(peer_endpoint),
|
|
enable_connection_aborted_(enable_connection_aborted),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
bool operator()(int result)
|
|
{
|
|
// Check whether the operation was successful.
|
|
if (result != 0)
|
|
{
|
|
asio::error error(result);
|
|
io_service_.post(bind_handler(handler_, error));
|
|
return true;
|
|
}
|
|
|
|
// Accept the waiting connection.
|
|
socket_addr_len_type addr_len = peer_endpoint_.capacity();
|
|
socket_holder new_socket(socket_ops::accept(
|
|
socket_, peer_endpoint_.data(), &addr_len));
|
|
asio::error error(new_socket.get() == invalid_socket
|
|
? socket_ops::get_error() : asio::error::success);
|
|
|
|
// Check if we need to run the operation again.
|
|
if (error == asio::error::would_block
|
|
|| error == asio::error::try_again)
|
|
return false;
|
|
if (error == asio::error::connection_aborted
|
|
&& !enable_connection_aborted_)
|
|
return false;
|
|
|
|
// Transfer ownership of the new socket to the peer object.
|
|
if (!error)
|
|
{
|
|
peer_endpoint_.resize(addr_len);
|
|
peer_.assign(peer_endpoint_.protocol(), new_socket.get(),
|
|
asio::assign_error(error));
|
|
if (!error)
|
|
new_socket.release();
|
|
}
|
|
|
|
io_service_.post(bind_handler(handler_, error));
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
Socket& peer_;
|
|
endpoint_type& peer_endpoint_;
|
|
bool enable_connection_aborted_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// 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_endpoint(implementation_type& impl, Socket& peer,
|
|
endpoint_type& peer_endpoint, Handler handler)
|
|
{
|
|
if (impl.socket_ == invalid_socket)
|
|
{
|
|
asio::error error(asio::error::bad_descriptor);
|
|
io_service().post(bind_handler(handler, error));
|
|
}
|
|
else if (peer.native() != invalid_socket)
|
|
{
|
|
asio::error error(asio::error::already_connected);
|
|
io_service().post(bind_handler(handler, error));
|
|
}
|
|
else
|
|
{
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking))
|
|
{
|
|
asio::error error(socket_ops::get_error());
|
|
io_service().post(bind_handler(handler, error));
|
|
return;
|
|
}
|
|
impl.flags_ |= implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
reactor_.start_read_op(impl.socket_,
|
|
accept_endp_handler<Socket, Handler>(
|
|
impl.socket_, io_service(), peer, peer_endpoint,
|
|
(impl.flags_ & implementation_type::enable_connection_aborted) != 0,
|
|
handler));
|
|
}
|
|
}
|
|
|
|
// Connect the socket to the specified endpoint.
|
|
template <typename Error_Handler>
|
|
void connect(implementation_type& impl, const endpoint_type& peer_endpoint,
|
|
Error_Handler error_handler)
|
|
{
|
|
// Open the socket if it is not already open.
|
|
if (impl.socket_ == invalid_socket)
|
|
{
|
|
// Get the flags used to create the new socket.
|
|
int family = peer_endpoint.protocol().family();
|
|
int type = peer_endpoint.protocol().type();
|
|
int proto = peer_endpoint.protocol().protocol();
|
|
|
|
// Create a new socket.
|
|
impl.socket_ = socket_ops::socket(family, type, proto);
|
|
if (impl.socket_ == invalid_socket)
|
|
{
|
|
error_handler(asio::error(socket_ops::get_error()));
|
|
return;
|
|
}
|
|
|
|
// Register the socket with the reactor.
|
|
if (int err = reactor_.register_descriptor(impl.socket_))
|
|
{
|
|
socket_ops::close(impl.socket_);
|
|
error_handler(asio::error(err));
|
|
return;
|
|
}
|
|
}
|
|
else if (impl.flags_ & implementation_type::internal_non_blocking)
|
|
{
|
|
// Mark the socket as blocking while we perform the connect.
|
|
ioctl_arg_type non_blocking = 0;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking))
|
|
{
|
|
error_handler(asio::error(socket_ops::get_error()));
|
|
return;
|
|
}
|
|
impl.flags_ &= ~implementation_type::internal_non_blocking;
|
|
}
|
|
|
|
// Perform the connect operation.
|
|
int result = socket_ops::connect(impl.socket_,
|
|
peer_endpoint.data(), peer_endpoint.size());
|
|
if (result == socket_error_retval)
|
|
error_handler(asio::error(socket_ops::get_error()));
|
|
else
|
|
error_handler(asio::error(0));
|
|
}
|
|
|
|
template <typename Handler>
|
|
class connect_handler
|
|
{
|
|
public:
|
|
connect_handler(socket_type socket, boost::shared_ptr<bool> completed,
|
|
asio::io_service& io_service, Reactor& reactor, Handler handler)
|
|
: socket_(socket),
|
|
completed_(completed),
|
|
io_service_(io_service),
|
|
work_(io_service),
|
|
reactor_(reactor),
|
|
handler_(handler)
|
|
{
|
|
}
|
|
|
|
bool operator()(int result)
|
|
{
|
|
// Check whether a handler has already been called for the connection.
|
|
// If it has, then we don't want to do anything in this handler.
|
|
if (*completed_)
|
|
return true;
|
|
|
|
// Cancel the other reactor operation for the connection.
|
|
*completed_ = true;
|
|
reactor_.enqueue_cancel_ops_unlocked(socket_);
|
|
|
|
// Check whether the operation was successful.
|
|
if (result != 0)
|
|
{
|
|
asio::error error(result);
|
|
io_service_.post(bind_handler(handler_, error));
|
|
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) == socket_error_retval)
|
|
{
|
|
asio::error error(socket_ops::get_error());
|
|
io_service_.post(bind_handler(handler_, error));
|
|
return true;
|
|
}
|
|
|
|
// If connection failed then post the handler with the error code.
|
|
if (connect_error)
|
|
{
|
|
asio::error error(connect_error);
|
|
io_service_.post(bind_handler(handler_, error));
|
|
return true;
|
|
}
|
|
|
|
// Post the result of the successful connection operation.
|
|
asio::error error(asio::error::success);
|
|
io_service_.post(bind_handler(handler_, error));
|
|
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
socket_type socket_;
|
|
boost::shared_ptr<bool> completed_;
|
|
asio::io_service& io_service_;
|
|
asio::io_service::work work_;
|
|
Reactor& reactor_;
|
|
Handler handler_;
|
|
};
|
|
|
|
// Start an asynchronous connect.
|
|
template <typename Handler>
|
|
void async_connect(implementation_type& impl,
|
|
const endpoint_type& peer_endpoint, Handler handler)
|
|
{
|
|
// Open the socket if it is not already open.
|
|
if (impl.socket_ == invalid_socket)
|
|
{
|
|
// Get the flags used to create the new socket.
|
|
int family = peer_endpoint.protocol().family();
|
|
int type = peer_endpoint.protocol().type();
|
|
int proto = peer_endpoint.protocol().protocol();
|
|
|
|
// Create a new socket.
|
|
impl.socket_ = socket_ops::socket(family, type, proto);
|
|
if (impl.socket_ == invalid_socket)
|
|
{
|
|
asio::error error(socket_ops::get_error());
|
|
io_service().post(bind_handler(handler, error));
|
|
return;
|
|
}
|
|
|
|
// Register the socket with the reactor.
|
|
if (int err = reactor_.register_descriptor(impl.socket_))
|
|
{
|
|
socket_ops::close(impl.socket_);
|
|
asio::error error(err);
|
|
io_service().post(bind_handler(handler, error));
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Make socket non-blocking.
|
|
if (!(impl.flags_ & implementation_type::internal_non_blocking))
|
|
{
|
|
ioctl_arg_type non_blocking = 1;
|
|
if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking))
|
|
{
|
|
asio::error error(socket_ops::get_error());
|
|
io_service().post(bind_handler(handler, error));
|
|
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.
|
|
if (socket_ops::connect(impl.socket_, peer_endpoint.data(),
|
|
peer_endpoint.size()) == 0)
|
|
{
|
|
// The connect operation has finished successfully so we need to post the
|
|
// handler immediately.
|
|
asio::error error(asio::error::success);
|
|
io_service().post(bind_handler(handler, error));
|
|
}
|
|
else if (socket_ops::get_error() == asio::error::in_progress
|
|
|| socket_ops::get_error() == asio::error::would_block)
|
|
{
|
|
// The connection is happening in the background, and we need to wait
|
|
// until the socket becomes writeable.
|
|
boost::shared_ptr<bool> completed(new bool(false));
|
|
reactor_.start_write_and_except_ops(impl.socket_,
|
|
connect_handler<Handler>(
|
|
impl.socket_, completed, io_service(), reactor_, handler));
|
|
}
|
|
else
|
|
{
|
|
// The connect operation has failed, so post the handler immediately.
|
|
asio::error error(socket_ops::get_error());
|
|
io_service().post(bind_handler(handler, error));
|
|
}
|
|
}
|
|
|
|
private:
|
|
// The selector that performs event demultiplexing for the provider.
|
|
Reactor& reactor_;
|
|
};
|
|
|
|
} // namespace detail
|
|
} // namespace asio
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#endif // ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP
|