| // |
| // reactive_socket_service.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| |
| #ifndef BOOST_ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP |
| #define BOOST_ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include <boost/asio/detail/push_options.hpp> |
| |
| #include <boost/asio/detail/push_options.hpp> |
| #include <boost/shared_ptr.hpp> |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #include <boost/asio/buffer.hpp> |
| #include <boost/asio/error.hpp> |
| #include <boost/asio/io_service.hpp> |
| #include <boost/asio/socket_base.hpp> |
| #include <boost/asio/detail/bind_handler.hpp> |
| #include <boost/asio/detail/handler_base_from_member.hpp> |
| #include <boost/asio/detail/noncopyable.hpp> |
| #include <boost/asio/detail/service_base.hpp> |
| #include <boost/asio/detail/socket_holder.hpp> |
| #include <boost/asio/detail/socket_ops.hpp> |
| #include <boost/asio/detail/socket_types.hpp> |
| |
| namespace boost { |
| namespace asio { |
| namespace detail { |
| |
| template <typename Protocol, typename Reactor> |
| class reactive_socket_service |
| : public boost::asio::detail::service_base< |
| reactive_socket_service<Protocol, Reactor> > |
| { |
| public: |
| // The protocol type. |
| typedef Protocol protocol_type; |
| |
| // The endpoint type. |
| typedef typename Protocol::endpoint endpoint_type; |
| |
| // The native type of a socket. |
| typedef socket_type native_type; |
| |
| // The implementation type of the socket. |
| class implementation_type |
| : private boost::asio::detail::noncopyable |
| { |
| public: |
| // Default constructor. |
| implementation_type() |
| : socket_(invalid_socket), |
| flags_(0), |
| protocol_(endpoint_type().protocol()) |
| { |
| } |
| |
| private: |
| // Only this service will have access to the internal values. |
| friend class reactive_socket_service<Protocol, Reactor>; |
| |
| // The native socket representation. |
| socket_type socket_; |
| |
| enum |
| { |
| // The user wants a non-blocking socket. |
| user_set_non_blocking = 1, |
| |
| // The implementation wants a non-blocking socket (in order to be able to |
| // perform asynchronous read and write operations). |
| internal_non_blocking = 2, |
| |
| // Helper "flag" used to determine whether the socket is non-blocking. |
| non_blocking = user_set_non_blocking | internal_non_blocking, |
| |
| // User wants connection_aborted errors, which are disabled by default. |
| enable_connection_aborted = 4, |
| |
| // The user set the linger option. Needs to be checked when closing. |
| user_set_linger = 8 |
| }; |
| |
| // Flags indicating the current state of the socket. |
| unsigned char flags_; |
| |
| // The protocol associated with the socket. |
| protocol_type protocol_; |
| |
| // Per-descriptor data used by the reactor. |
| typename Reactor::per_descriptor_data reactor_data_; |
| }; |
| |
| // The maximum number of buffers to support in a single operation. |
| enum { max_buffers = 64 < max_iov_len ? 64 : max_iov_len }; |
| |
| // Constructor. |
| reactive_socket_service(boost::asio::io_service& io_service) |
| : boost::asio::detail::service_base< |
| reactive_socket_service<Protocol, Reactor> >(io_service), |
| reactor_(boost::asio::use_service<Reactor>(io_service)) |
| { |
| reactor_.init_task(); |
| } |
| |
| // Destroy all user-defined handler objects owned by the service. |
| void shutdown_service() |
| { |
| } |
| |
| // Construct a new socket implementation. |
| void construct(implementation_type& impl) |
| { |
| impl.socket_ = invalid_socket; |
| impl.flags_ = 0; |
| } |
| |
| // Destroy a socket implementation. |
| void destroy(implementation_type& impl) |
| { |
| if (impl.socket_ != invalid_socket) |
| { |
| reactor_.close_descriptor(impl.socket_, impl.reactor_data_); |
| |
| if (impl.flags_ & implementation_type::non_blocking) |
| { |
| ioctl_arg_type non_blocking = 0; |
| boost::system::error_code ignored_ec; |
| socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ignored_ec); |
| impl.flags_ &= ~implementation_type::non_blocking; |
| } |
| |
| if (impl.flags_ & implementation_type::user_set_linger) |
| { |
| ::linger opt; |
| opt.l_onoff = 0; |
| opt.l_linger = 0; |
| boost::system::error_code ignored_ec; |
| socket_ops::setsockopt(impl.socket_, |
| SOL_SOCKET, SO_LINGER, &opt, sizeof(opt), ignored_ec); |
| } |
| |
| boost::system::error_code ignored_ec; |
| socket_ops::close(impl.socket_, ignored_ec); |
| |
| impl.socket_ = invalid_socket; |
| } |
| } |
| |
| // Open a new socket implementation. |
| boost::system::error_code open(implementation_type& impl, |
| const protocol_type& protocol, boost::system::error_code& ec) |
| { |
| if (is_open(impl)) |
| { |
| ec = boost::asio::error::already_open; |
| return ec; |
| } |
| |
| socket_holder sock(socket_ops::socket(protocol.family(), |
| protocol.type(), protocol.protocol(), ec)); |
| if (sock.get() == invalid_socket) |
| return ec; |
| |
| if (int err = reactor_.register_descriptor(sock.get(), impl.reactor_data_)) |
| { |
| ec = boost::system::error_code(err, |
| boost::asio::error::get_system_category()); |
| return ec; |
| } |
| |
| impl.socket_ = sock.release(); |
| impl.flags_ = 0; |
| impl.protocol_ = protocol; |
| ec = boost::system::error_code(); |
| return ec; |
| } |
| |
| // Assign a native socket to a socket implementation. |
| boost::system::error_code assign(implementation_type& impl, |
| const protocol_type& protocol, const native_type& native_socket, |
| boost::system::error_code& ec) |
| { |
| if (is_open(impl)) |
| { |
| ec = boost::asio::error::already_open; |
| return ec; |
| } |
| |
| if (int err = reactor_.register_descriptor( |
| native_socket, impl.reactor_data_)) |
| { |
| ec = boost::system::error_code(err, |
| boost::asio::error::get_system_category()); |
| return ec; |
| } |
| |
| impl.socket_ = native_socket; |
| impl.flags_ = 0; |
| impl.protocol_ = protocol; |
| ec = boost::system::error_code(); |
| return ec; |
| } |
| |
| // Determine whether the socket is open. |
| bool is_open(const implementation_type& impl) const |
| { |
| return impl.socket_ != invalid_socket; |
| } |
| |
| // Destroy a socket implementation. |
| boost::system::error_code close(implementation_type& impl, |
| boost::system::error_code& ec) |
| { |
| if (is_open(impl)) |
| { |
| reactor_.close_descriptor(impl.socket_, impl.reactor_data_); |
| |
| if (impl.flags_ & implementation_type::non_blocking) |
| { |
| ioctl_arg_type non_blocking = 0; |
| boost::system::error_code ignored_ec; |
| socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ignored_ec); |
| impl.flags_ &= ~implementation_type::non_blocking; |
| } |
| |
| if (socket_ops::close(impl.socket_, ec) == socket_error_retval) |
| return ec; |
| |
| impl.socket_ = invalid_socket; |
| } |
| |
| ec = boost::system::error_code(); |
| return ec; |
| } |
| |
| // Get the native socket representation. |
| native_type native(implementation_type& impl) |
| { |
| return impl.socket_; |
| } |
| |
| // Cancel all operations associated with the socket. |
| boost::system::error_code cancel(implementation_type& impl, |
| boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return ec; |
| } |
| |
| reactor_.cancel_ops(impl.socket_, impl.reactor_data_); |
| ec = boost::system::error_code(); |
| return ec; |
| } |
| |
| // Determine whether the socket is at the out-of-band data mark. |
| bool at_mark(const implementation_type& impl, |
| boost::system::error_code& ec) const |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return false; |
| } |
| |
| boost::asio::detail::ioctl_arg_type value = 0; |
| socket_ops::ioctl(impl.socket_, SIOCATMARK, &value, ec); |
| #if defined(ENOTTY) |
| if (ec.value() == ENOTTY) |
| ec = boost::asio::error::not_socket; |
| #endif // defined(ENOTTY) |
| return ec ? false : value != 0; |
| } |
| |
| // Determine the number of bytes available for reading. |
| std::size_t available(const implementation_type& impl, |
| boost::system::error_code& ec) const |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return 0; |
| } |
| |
| boost::asio::detail::ioctl_arg_type value = 0; |
| socket_ops::ioctl(impl.socket_, FIONREAD, &value, ec); |
| #if defined(ENOTTY) |
| if (ec.value() == ENOTTY) |
| ec = boost::asio::error::not_socket; |
| #endif // defined(ENOTTY) |
| return ec ? static_cast<std::size_t>(0) : static_cast<std::size_t>(value); |
| } |
| |
| // Bind the socket to the specified local endpoint. |
| boost::system::error_code bind(implementation_type& impl, |
| const endpoint_type& endpoint, boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return ec; |
| } |
| |
| socket_ops::bind(impl.socket_, endpoint.data(), endpoint.size(), ec); |
| return ec; |
| } |
| |
| // Place the socket into the state where it will listen for new connections. |
| boost::system::error_code listen(implementation_type& impl, int backlog, |
| boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return ec; |
| } |
| |
| socket_ops::listen(impl.socket_, backlog, ec); |
| return ec; |
| } |
| |
| // Set a socket option. |
| template <typename Option> |
| boost::system::error_code set_option(implementation_type& impl, |
| const Option& option, boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return ec; |
| } |
| |
| if (option.level(impl.protocol_) == custom_socket_option_level |
| && option.name(impl.protocol_) == enable_connection_aborted_option) |
| { |
| if (option.size(impl.protocol_) != sizeof(int)) |
| { |
| ec = boost::asio::error::invalid_argument; |
| } |
| else |
| { |
| if (*reinterpret_cast<const int*>(option.data(impl.protocol_))) |
| impl.flags_ |= implementation_type::enable_connection_aborted; |
| else |
| impl.flags_ &= ~implementation_type::enable_connection_aborted; |
| ec = boost::system::error_code(); |
| } |
| return ec; |
| } |
| else |
| { |
| if (option.level(impl.protocol_) == SOL_SOCKET |
| && option.name(impl.protocol_) == SO_LINGER) |
| { |
| impl.flags_ |= implementation_type::user_set_linger; |
| } |
| |
| socket_ops::setsockopt(impl.socket_, |
| option.level(impl.protocol_), option.name(impl.protocol_), |
| option.data(impl.protocol_), option.size(impl.protocol_), ec); |
| |
| #if defined(__MACH__) && defined(__APPLE__) \ |
| || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) |
| // To implement portable behaviour for SO_REUSEADDR with UDP sockets we |
| // need to also set SO_REUSEPORT on BSD-based platforms. |
| if (!ec && impl.protocol_.type() == SOCK_DGRAM |
| && option.level(impl.protocol_) == SOL_SOCKET |
| && option.name(impl.protocol_) == SO_REUSEADDR) |
| { |
| boost::system::error_code ignored_ec; |
| socket_ops::setsockopt(impl.socket_, SOL_SOCKET, SO_REUSEPORT, |
| option.data(impl.protocol_), option.size(impl.protocol_), |
| ignored_ec); |
| } |
| #endif |
| |
| return ec; |
| } |
| } |
| |
| // Set a socket option. |
| template <typename Option> |
| boost::system::error_code get_option(const implementation_type& impl, |
| Option& option, boost::system::error_code& ec) const |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return ec; |
| } |
| |
| if (option.level(impl.protocol_) == custom_socket_option_level |
| && option.name(impl.protocol_) == enable_connection_aborted_option) |
| { |
| if (option.size(impl.protocol_) != sizeof(int)) |
| { |
| ec = boost::asio::error::invalid_argument; |
| } |
| else |
| { |
| int* target = reinterpret_cast<int*>(option.data(impl.protocol_)); |
| if (impl.flags_ & implementation_type::enable_connection_aborted) |
| *target = 1; |
| else |
| *target = 0; |
| option.resize(impl.protocol_, sizeof(int)); |
| ec = boost::system::error_code(); |
| } |
| return ec; |
| } |
| else |
| { |
| size_t size = option.size(impl.protocol_); |
| socket_ops::getsockopt(impl.socket_, |
| option.level(impl.protocol_), option.name(impl.protocol_), |
| option.data(impl.protocol_), &size, ec); |
| if (!ec) |
| option.resize(impl.protocol_, size); |
| return ec; |
| } |
| } |
| |
| // Perform an IO control command on the socket. |
| template <typename IO_Control_Command> |
| boost::system::error_code io_control(implementation_type& impl, |
| IO_Control_Command& command, boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return ec; |
| } |
| |
| if (command.name() == static_cast<int>(FIONBIO)) |
| { |
| // Flags are manipulated in a temporary variable so that the socket |
| // implementation is not updated unless the ioctl operation succeeds. |
| unsigned char new_flags = impl.flags_; |
| if (*static_cast<ioctl_arg_type*>(command.data())) |
| new_flags |= implementation_type::user_set_non_blocking; |
| else |
| new_flags &= ~implementation_type::user_set_non_blocking; |
| |
| // Perform ioctl on socket if the non-blocking state has changed. |
| if (!(impl.flags_ & implementation_type::non_blocking) |
| && (new_flags & implementation_type::non_blocking)) |
| { |
| ioctl_arg_type non_blocking = 1; |
| socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec); |
| } |
| else if ((impl.flags_ & implementation_type::non_blocking) |
| && !(new_flags & implementation_type::non_blocking)) |
| { |
| ioctl_arg_type non_blocking = 0; |
| socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec); |
| } |
| else |
| { |
| ec = boost::system::error_code(); |
| } |
| |
| // Update socket implementation's flags only if successful. |
| if (!ec) |
| impl.flags_ = new_flags; |
| } |
| else |
| { |
| socket_ops::ioctl(impl.socket_, command.name(), |
| static_cast<ioctl_arg_type*>(command.data()), ec); |
| } |
| return ec; |
| } |
| |
| // Get the local endpoint. |
| endpoint_type local_endpoint(const implementation_type& impl, |
| boost::system::error_code& ec) const |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return endpoint_type(); |
| } |
| |
| endpoint_type endpoint; |
| std::size_t addr_len = endpoint.capacity(); |
| if (socket_ops::getsockname(impl.socket_, endpoint.data(), &addr_len, ec)) |
| return endpoint_type(); |
| endpoint.resize(addr_len); |
| return endpoint; |
| } |
| |
| // Get the remote endpoint. |
| endpoint_type remote_endpoint(const implementation_type& impl, |
| boost::system::error_code& ec) const |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return endpoint_type(); |
| } |
| |
| endpoint_type endpoint; |
| std::size_t addr_len = endpoint.capacity(); |
| if (socket_ops::getpeername(impl.socket_, endpoint.data(), &addr_len, ec)) |
| return endpoint_type(); |
| endpoint.resize(addr_len); |
| return endpoint; |
| } |
| |
| /// Disable sends or receives on the socket. |
| boost::system::error_code shutdown(implementation_type& impl, |
| socket_base::shutdown_type what, boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return ec; |
| } |
| |
| socket_ops::shutdown(impl.socket_, what, ec); |
| return ec; |
| } |
| |
| // Send the given data to the peer. |
| template <typename ConstBufferSequence> |
| size_t send(implementation_type& impl, const ConstBufferSequence& buffers, |
| socket_base::message_flags flags, boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::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; |
| size_t total_buffer_size = 0; |
| for (; iter != end && i < max_buffers; ++iter, ++i) |
| { |
| boost::asio::const_buffer buffer(*iter); |
| socket_ops::init_buf(bufs[i], |
| boost::asio::buffer_cast<const void*>(buffer), |
| boost::asio::buffer_size(buffer)); |
| total_buffer_size += boost::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 = boost::system::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 != boost::asio::error::would_block |
| && ec != boost::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, boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::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, boost::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(boost::system::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) |
| { |
| boost::asio::const_buffer buffer(*iter); |
| socket_ops::init_buf(bufs[i], |
| boost::asio::buffer_cast<const void*>(buffer), |
| boost::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 == boost::asio::error::would_block |
| || ec == boost::asio::error::try_again) |
| return false; |
| |
| bytes_transferred = (bytes < 0 ? 0 : bytes); |
| return true; |
| } |
| |
| void complete(const boost::system::error_code& ec, |
| std::size_t bytes_transferred) |
| { |
| io_service_.post(bind_handler(this->handler_, ec, bytes_transferred)); |
| } |
| |
| private: |
| socket_type socket_; |
| boost::asio::io_service& io_service_; |
| boost::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, |
| boost::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) |
| { |
| boost::asio::const_buffer buffer(*iter); |
| total_buffer_size += boost::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, |
| boost::system::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; |
| boost::system::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(boost::asio::io_service& io_service, Handler handler) |
| : handler_base_from_member<Handler>(handler), |
| work_(io_service) |
| { |
| } |
| |
| bool perform(boost::system::error_code&, |
| std::size_t& bytes_transferred) |
| { |
| bytes_transferred = 0; |
| return true; |
| } |
| |
| void complete(const boost::system::error_code& ec, |
| std::size_t bytes_transferred) |
| { |
| work_.get_io_service().post(bind_handler( |
| this->handler_, ec, bytes_transferred)); |
| } |
| |
| private: |
| boost::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, |
| boost::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, |
| boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::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) |
| { |
| boost::asio::const_buffer buffer(*iter); |
| socket_ops::init_buf(bufs[i], |
| boost::asio::buffer_cast<const void*>(buffer), |
| boost::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 != boost::asio::error::would_block |
| && ec != boost::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&, |
| boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::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, boost::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(boost::system::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) |
| { |
| boost::asio::const_buffer buffer(*iter); |
| socket_ops::init_buf(bufs[i], |
| boost::asio::buffer_cast<const void*>(buffer), |
| boost::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 == boost::asio::error::would_block |
| || ec == boost::asio::error::try_again) |
| return false; |
| |
| bytes_transferred = (bytes < 0 ? 0 : bytes); |
| return true; |
| } |
| |
| void complete(const boost::system::error_code& ec, |
| std::size_t bytes_transferred) |
| { |
| io_service_.post(bind_handler(this->handler_, ec, bytes_transferred)); |
| } |
| |
| private: |
| socket_type socket_; |
| boost::asio::io_service& io_service_; |
| boost::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, |
| boost::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; |
| boost::system::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, |
| boost::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, boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::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) |
| { |
| boost::asio::mutable_buffer buffer(*iter); |
| socket_ops::init_buf(bufs[i], |
| boost::asio::buffer_cast<void*>(buffer), |
| boost::asio::buffer_size(buffer)); |
| total_buffer_size += boost::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 = boost::system::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 = boost::asio::error::eof; |
| return 0; |
| } |
| |
| // Operation failed. |
| if ((impl.flags_ & implementation_type::user_set_non_blocking) |
| || (ec != boost::asio::error::would_block |
| && ec != boost::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, boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::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, |
| boost::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(boost::system::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) |
| { |
| boost::asio::mutable_buffer buffer(*iter); |
| socket_ops::init_buf(bufs[i], |
| boost::asio::buffer_cast<void*>(buffer), |
| boost::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 = boost::asio::error::eof; |
| |
| // Check if we need to run the operation again. |
| if (ec == boost::asio::error::would_block |
| || ec == boost::asio::error::try_again) |
| return false; |
| |
| bytes_transferred = (bytes < 0 ? 0 : bytes); |
| return true; |
| } |
| |
| void complete(const boost::system::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_; |
| boost::asio::io_service& io_service_; |
| boost::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, |
| boost::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) |
| { |
| boost::asio::mutable_buffer buffer(*iter); |
| total_buffer_size += boost::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, |
| boost::system::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; |
| boost::system::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, |
| boost::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, |
| boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::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) |
| { |
| boost::asio::mutable_buffer buffer(*iter); |
| socket_ops::init_buf(bufs[i], |
| boost::asio::buffer_cast<void*>(buffer), |
| boost::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 = boost::asio::error::eof; |
| return 0; |
| } |
| |
| // Operation failed. |
| if ((impl.flags_ & implementation_type::user_set_non_blocking) |
| || (ec != boost::asio::error::would_block |
| && ec != boost::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, |
| boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::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, |
| boost::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(boost::system::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) |
| { |
| boost::asio::mutable_buffer buffer(*iter); |
| socket_ops::init_buf(bufs[i], |
| boost::asio::buffer_cast<void*>(buffer), |
| boost::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 = boost::asio::error::eof; |
| |
| // Check if we need to run the operation again. |
| if (ec == boost::asio::error::would_block |
| || ec == boost::asio::error::try_again) |
| return false; |
| |
| sender_endpoint_.resize(addr_len); |
| bytes_transferred = (bytes < 0 ? 0 : bytes); |
| return true; |
| } |
| |
| void complete(const boost::system::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_; |
| boost::asio::io_service& io_service_; |
| boost::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, |
| boost::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; |
| boost::system::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, |
| boost::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> |
| boost::system::error_code accept(implementation_type& impl, |
| Socket& peer, endpoint_type* peer_endpoint, boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return ec; |
| } |
| |
| // We cannot accept a socket that is already open. |
| if (peer.is_open()) |
| { |
| ec = boost::asio::error::already_open; |
| return ec; |
| } |
| |
| // Accept a socket. |
| for (;;) |
| { |
| // Try to complete the operation without blocking. |
| 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 == boost::asio::error::would_block |
| || ec == boost::asio::error::try_again) |
| { |
| if (impl.flags_ & implementation_type::user_set_non_blocking) |
| return ec; |
| // Fall through to retry operation. |
| } |
| else if (ec == boost::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, boost::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(boost::system::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 == boost::asio::error::would_block |
| || ec == boost::asio::error::try_again) |
| return false; |
| if (ec == boost::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 boost::system::error_code& ec, std::size_t) |
| { |
| io_service_.post(bind_handler(this->handler_, ec)); |
| } |
| |
| private: |
| socket_type socket_; |
| boost::asio::io_service& io_service_; |
| boost::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, |
| boost::asio::error::bad_descriptor)); |
| } |
| else if (peer.is_open()) |
| { |
| this->get_io_service().post(bind_handler(handler, |
| boost::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; |
| boost::system::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. |
| boost::system::error_code connect(implementation_type& impl, |
| const endpoint_type& peer_endpoint, boost::system::error_code& ec) |
| { |
| if (!is_open(impl)) |
| { |
| ec = boost::asio::error::bad_descriptor; |
| return ec; |
| } |
| |
| // Perform the connect operation. |
| socket_ops::connect(impl.socket_, |
| peer_endpoint.data(), peer_endpoint.size(), ec); |
| if (ec != boost::asio::error::in_progress |
| && ec != boost::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 = boost::system::error_code(connect_error, |
| boost::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, |
| boost::asio::io_service& io_service, Handler handler) |
| : handler_base_from_member<Handler>(handler), |
| socket_(socket), |
| io_service_(io_service), |
| work_(io_service) |
| { |
| } |
| |
| bool perform(boost::system::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 = boost::system::error_code(connect_error, |
| boost::asio::error::get_system_category()); |
| return true; |
| } |
| |
| return true; |
| } |
| |
| void complete(const boost::system::error_code& ec, std::size_t) |
| { |
| io_service_.post(bind_handler(this->handler_, ec)); |
| } |
| |
| private: |
| socket_type socket_; |
| boost::asio::io_service& io_service_; |
| boost::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, |
| boost::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; |
| boost::system::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. |
| boost::system::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, |
| boost::system::error_code())); |
| } |
| else if (ec == boost::asio::error::in_progress |
| || ec == boost::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 |
| } // namespace boost |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // BOOST_ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP |
