| // |
| // detail/impl/socket_select_interrupter.ipp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 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_IMPL_SOCKET_SELECT_INTERRUPTER_IPP |
| #define BOOST_ASIO_DETAIL_IMPL_SOCKET_SELECT_INTERRUPTER_IPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include <boost/asio/detail/config.hpp> |
| |
| #if defined(BOOST_WINDOWS) \ |
| || defined(__CYGWIN__) \ |
| || defined(__SYMBIAN32__) |
| |
| #include <cstdlib> |
| #include <boost/asio/detail/socket_holder.hpp> |
| #include <boost/asio/detail/socket_ops.hpp> |
| #include <boost/asio/detail/socket_select_interrupter.hpp> |
| #include <boost/asio/detail/throw_error.hpp> |
| #include <boost/asio/error.hpp> |
| |
| #include <boost/asio/detail/push_options.hpp> |
| |
| namespace boost { |
| namespace asio { |
| namespace detail { |
| |
| socket_select_interrupter::socket_select_interrupter() |
| { |
| boost::system::error_code ec; |
| socket_holder acceptor(socket_ops::socket( |
| AF_INET, SOCK_STREAM, IPPROTO_TCP, ec)); |
| if (acceptor.get() == invalid_socket) |
| boost::asio::detail::throw_error(ec, "socket_select_interrupter"); |
| |
| int opt = 1; |
| socket_ops::state_type acceptor_state = 0; |
| socket_ops::setsockopt(acceptor.get(), acceptor_state, |
| SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt), ec); |
| |
| using namespace std; // For memset. |
| sockaddr_in4_type addr; |
| std::size_t addr_len = sizeof(addr); |
| memset(&addr, 0, sizeof(addr)); |
| addr.sin_family = AF_INET; |
| addr.sin_addr.s_addr = inet_addr("127.0.0.1"); |
| addr.sin_port = 0; |
| if (socket_ops::bind(acceptor.get(), (const socket_addr_type*)&addr, |
| addr_len, ec) == socket_error_retval) |
| boost::asio::detail::throw_error(ec, "socket_select_interrupter"); |
| |
| if (socket_ops::getsockname(acceptor.get(), (socket_addr_type*)&addr, |
| &addr_len, ec) == socket_error_retval) |
| boost::asio::detail::throw_error(ec, "socket_select_interrupter"); |
| |
| // Some broken firewalls on Windows will intermittently cause getsockname to |
| // return 0.0.0.0 when the socket is actually bound to 127.0.0.1. We |
| // explicitly specify the target address here to work around this problem. |
| addr.sin_addr.s_addr = inet_addr("127.0.0.1"); |
| |
| if (socket_ops::listen(acceptor.get(), |
| SOMAXCONN, ec) == socket_error_retval) |
| boost::asio::detail::throw_error(ec, "socket_select_interrupter"); |
| |
| socket_holder client(socket_ops::socket( |
| AF_INET, SOCK_STREAM, IPPROTO_TCP, ec)); |
| if (client.get() == invalid_socket) |
| boost::asio::detail::throw_error(ec, "socket_select_interrupter"); |
| |
| if (socket_ops::connect(client.get(), (const socket_addr_type*)&addr, |
| addr_len, ec) == socket_error_retval) |
| boost::asio::detail::throw_error(ec, "socket_select_interrupter"); |
| |
| socket_holder server(socket_ops::accept(acceptor.get(), 0, 0, ec)); |
| if (server.get() == invalid_socket) |
| boost::asio::detail::throw_error(ec, "socket_select_interrupter"); |
| |
| ioctl_arg_type non_blocking = 1; |
| socket_ops::state_type client_state = 0; |
| if (socket_ops::ioctl(client.get(), client_state, |
| FIONBIO, &non_blocking, ec)) |
| boost::asio::detail::throw_error(ec, "socket_select_interrupter"); |
| |
| opt = 1; |
| socket_ops::setsockopt(client.get(), client_state, |
| IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt), ec); |
| |
| non_blocking = 1; |
| socket_ops::state_type server_state = 0; |
| if (socket_ops::ioctl(server.get(), server_state, |
| FIONBIO, &non_blocking, ec)) |
| boost::asio::detail::throw_error(ec, "socket_select_interrupter"); |
| |
| opt = 1; |
| socket_ops::setsockopt(server.get(), server_state, |
| IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt), ec); |
| |
| read_descriptor_ = server.release(); |
| write_descriptor_ = client.release(); |
| } |
| |
| socket_select_interrupter::~socket_select_interrupter() |
| { |
| boost::system::error_code ec; |
| socket_ops::state_type state = socket_ops::internal_non_blocking; |
| if (read_descriptor_ != invalid_socket) |
| socket_ops::close(read_descriptor_, state, true, ec); |
| if (write_descriptor_ != invalid_socket) |
| socket_ops::close(write_descriptor_, state, true, ec); |
| } |
| |
| void socket_select_interrupter::interrupt() |
| { |
| char byte = 0; |
| socket_ops::buf b; |
| socket_ops::init_buf(b, &byte, 1); |
| boost::system::error_code ec; |
| socket_ops::send(write_descriptor_, &b, 1, 0, ec); |
| } |
| |
| bool socket_select_interrupter::reset() |
| { |
| char data[1024]; |
| socket_ops::buf b; |
| socket_ops::init_buf(b, data, sizeof(data)); |
| boost::system::error_code ec; |
| int bytes_read = socket_ops::recv(read_descriptor_, &b, 1, 0, ec); |
| bool was_interrupted = (bytes_read > 0); |
| while (bytes_read == sizeof(data)) |
| bytes_read = socket_ops::recv(read_descriptor_, &b, 1, 0, ec); |
| return was_interrupted; |
| } |
| |
| } // namespace detail |
| } // namespace asio |
| } // namespace boost |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // defined(BOOST_WINDOWS) |
| // || defined(__CYGWIN__) |
| // || defined(__SYMBIAN32__) |
| |
| #endif // BOOST_ASIO_DETAIL_IMPL_SOCKET_SELECT_INTERRUPTER_IPP |