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authorAnas Nashif <anas.nashif@intel.com>2012-10-30 19:57:26 (GMT)
committerAnas Nashif <anas.nashif@intel.com>2012-10-30 19:57:26 (GMT)
commit1a78a62555be32868418fe52f8e330c9d0f95d5a (patch)
treed3765a80e7d3b9640ec2e930743630cd6b9fce2b /boost/asio/detail/impl/socket_ops.ipp
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Imported Upstream version 1.49.0upstream/1.49.0
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diff --git a/boost/asio/detail/impl/socket_ops.ipp b/boost/asio/detail/impl/socket_ops.ipp
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+//
+// detail/impl/socket_ops.ipp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2012 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_SOCKET_OPS_IPP
+#define BOOST_ASIO_DETAIL_SOCKET_OPS_IPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+#include <boost/assert.hpp>
+#include <boost/detail/workaround.hpp>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <cerrno>
+#include <new>
+#include <boost/asio/detail/socket_ops.hpp>
+#include <boost/asio/error.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+namespace socket_ops {
+
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+struct msghdr { int msg_namelen; };
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+
+#if defined(__hpux)
+// HP-UX doesn't declare these functions extern "C", so they are declared again
+// here to avoid linker errors about undefined symbols.
+extern "C" char* if_indextoname(unsigned int, char*);
+extern "C" unsigned int if_nametoindex(const char*);
+#endif // defined(__hpux)
+
+inline void clear_last_error()
+{
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ WSASetLastError(0);
+#else
+ errno = 0;
+#endif
+}
+
+template <typename ReturnType>
+inline ReturnType error_wrapper(ReturnType return_value,
+ boost::system::error_code& ec)
+{
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ ec = boost::system::error_code(WSAGetLastError(),
+ boost::asio::error::get_system_category());
+#else
+ ec = boost::system::error_code(errno,
+ boost::asio::error::get_system_category());
+#endif
+ return return_value;
+}
+
+template <typename SockLenType>
+inline socket_type call_accept(SockLenType msghdr::*,
+ socket_type s, socket_addr_type* addr, std::size_t* addrlen)
+{
+ SockLenType tmp_addrlen = addrlen ? (SockLenType)*addrlen : 0;
+ socket_type result = ::accept(s, addr, addrlen ? &tmp_addrlen : 0);
+ if (addrlen)
+ *addrlen = (std::size_t)tmp_addrlen;
+ return result;
+}
+
+socket_type accept(socket_type s, socket_addr_type* addr,
+ std::size_t* addrlen, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return invalid_socket;
+ }
+
+ clear_last_error();
+
+ socket_type new_s = error_wrapper(call_accept(
+ &msghdr::msg_namelen, s, addr, addrlen), ec);
+ if (new_s == invalid_socket)
+ return new_s;
+
+#if defined(__MACH__) && defined(__APPLE__) || defined(__FreeBSD__)
+ int optval = 1;
+ int result = error_wrapper(::setsockopt(new_s,
+ SOL_SOCKET, SO_NOSIGPIPE, &optval, sizeof(optval)), ec);
+ if (result != 0)
+ {
+ ::close(new_s);
+ return invalid_socket;
+ }
+#endif
+
+ ec = boost::system::error_code();
+ return new_s;
+}
+
+socket_type sync_accept(socket_type s, state_type state,
+ socket_addr_type* addr, std::size_t* addrlen, boost::system::error_code& ec)
+{
+ // Accept a socket.
+ for (;;)
+ {
+ // Try to complete the operation without blocking.
+ socket_type new_socket = socket_ops::accept(s, addr, addrlen, ec);
+
+ // Check if operation succeeded.
+ if (new_socket != invalid_socket)
+ return new_socket;
+
+ // Operation failed.
+ if (ec == boost::asio::error::would_block
+ || ec == boost::asio::error::try_again)
+ {
+ if (state & user_set_non_blocking)
+ return invalid_socket;
+ // Fall through to retry operation.
+ }
+ else if (ec == boost::asio::error::connection_aborted)
+ {
+ if (state & enable_connection_aborted)
+ return invalid_socket;
+ // Fall through to retry operation.
+ }
+#if defined(EPROTO)
+ else if (ec.value() == EPROTO)
+ {
+ if (state & enable_connection_aborted)
+ return invalid_socket;
+ // Fall through to retry operation.
+ }
+#endif // defined(EPROTO)
+ else
+ return invalid_socket;
+
+ // Wait for socket to become ready.
+ if (socket_ops::poll_read(s, 0, ec) < 0)
+ return invalid_socket;
+ }
+}
+
+#if defined(BOOST_ASIO_HAS_IOCP)
+
+void complete_iocp_accept(socket_type s,
+ void* output_buffer, DWORD address_length,
+ socket_addr_type* addr, std::size_t* addrlen,
+ socket_type new_socket, boost::system::error_code& ec)
+{
+ // Map non-portable errors to their portable counterparts.
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ ec = boost::asio::error::connection_aborted;
+
+ if (!ec)
+ {
+ // Get the address of the peer.
+ if (addr && addrlen)
+ {
+ LPSOCKADDR local_addr = 0;
+ int local_addr_length = 0;
+ LPSOCKADDR remote_addr = 0;
+ int remote_addr_length = 0;
+ GetAcceptExSockaddrs(output_buffer, 0, address_length,
+ address_length, &local_addr, &local_addr_length,
+ &remote_addr, &remote_addr_length);
+ if (static_cast<std::size_t>(remote_addr_length) > *addrlen)
+ {
+ ec = boost::asio::error::invalid_argument;
+ }
+ else
+ {
+ using namespace std; // For memcpy.
+ memcpy(addr, remote_addr, remote_addr_length);
+ *addrlen = static_cast<std::size_t>(remote_addr_length);
+ }
+ }
+
+ // Need to set the SO_UPDATE_ACCEPT_CONTEXT option so that getsockname
+ // and getpeername will work on the accepted socket.
+ SOCKET update_ctx_param = s;
+ socket_ops::state_type state = 0;
+ socket_ops::setsockopt(new_socket, state,
+ SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT,
+ &update_ctx_param, sizeof(SOCKET), ec);
+ }
+}
+
+#else // defined(BOOST_ASIO_HAS_IOCP)
+
+bool non_blocking_accept(socket_type s,
+ state_type state, socket_addr_type* addr, std::size_t* addrlen,
+ boost::system::error_code& ec, socket_type& new_socket)
+{
+ for (;;)
+ {
+ // Accept the waiting connection.
+ new_socket = socket_ops::accept(s, addr, addrlen, ec);
+
+ // Check if operation succeeded.
+ if (new_socket != invalid_socket)
+ return true;
+
+ // Retry operation if interrupted by signal.
+ if (ec == boost::asio::error::interrupted)
+ continue;
+
+ // Operation failed.
+ if (ec == boost::asio::error::would_block
+ || ec == boost::asio::error::try_again)
+ {
+ if (state & user_set_non_blocking)
+ return true;
+ // Fall through to retry operation.
+ }
+ else if (ec == boost::asio::error::connection_aborted)
+ {
+ if (state & enable_connection_aborted)
+ return true;
+ // Fall through to retry operation.
+ }
+#if defined(EPROTO)
+ else if (ec.value() == EPROTO)
+ {
+ if (state & enable_connection_aborted)
+ return true;
+ // Fall through to retry operation.
+ }
+#endif // defined(EPROTO)
+ else
+ return true;
+
+ return false;
+ }
+}
+
+#endif // defined(BOOST_ASIO_HAS_IOCP)
+
+template <typename SockLenType>
+inline int call_bind(SockLenType msghdr::*,
+ socket_type s, const socket_addr_type* addr, std::size_t addrlen)
+{
+ return ::bind(s, addr, (SockLenType)addrlen);
+}
+
+int bind(socket_type s, const socket_addr_type* addr,
+ std::size_t addrlen, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+ clear_last_error();
+ int result = error_wrapper(call_bind(
+ &msghdr::msg_namelen, s, addr, addrlen), ec);
+ if (result == 0)
+ ec = boost::system::error_code();
+ return result;
+}
+
+int close(socket_type s, state_type& state,
+ bool destruction, boost::system::error_code& ec)
+{
+ int result = 0;
+ if (s != invalid_socket)
+ {
+ // We don't want the destructor to block, so set the socket to linger in
+ // the background. If the user doesn't like this behaviour then they need
+ // to explicitly close the socket.
+ if (destruction && (state & user_set_linger))
+ {
+ ::linger opt;
+ opt.l_onoff = 0;
+ opt.l_linger = 0;
+ boost::system::error_code ignored_ec;
+ socket_ops::setsockopt(s, state, SOL_SOCKET,
+ SO_LINGER, &opt, sizeof(opt), ignored_ec);
+ }
+
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ result = error_wrapper(::closesocket(s), ec);
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ result = error_wrapper(::close(s), ec);
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+
+ if (result != 0
+ && (ec == boost::asio::error::would_block
+ || ec == boost::asio::error::try_again))
+ {
+ // According to UNIX Network Programming Vol. 1, it is possible for
+ // close() to fail with EWOULDBLOCK under certain circumstances. What
+ // isn't clear is the state of the descriptor after this error. The one
+ // current OS where this behaviour is seen, Windows, says that the socket
+ // remains open. Therefore we'll put the descriptor back into blocking
+ // mode and have another attempt at closing it.
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ ioctl_arg_type arg = 0;
+ ::ioctlsocket(s, FIONBIO, &arg);
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+# if defined(__SYMBIAN32__)
+ int flags = ::fcntl(s, F_GETFL, 0);
+ if (flags >= 0)
+ ::fcntl(s, F_SETFL, flags & ~O_NONBLOCK);
+# else // defined(__SYMBIAN32__)
+ ioctl_arg_type arg = 0;
+ ::ioctl(s, FIONBIO, &arg);
+# endif // defined(__SYMBIAN32__)
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ state &= ~non_blocking;
+
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ result = error_wrapper(::closesocket(s), ec);
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ result = error_wrapper(::close(s), ec);
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ }
+ }
+
+ if (result == 0)
+ ec = boost::system::error_code();
+ return result;
+}
+
+bool set_user_non_blocking(socket_type s,
+ state_type& state, bool value, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return false;
+ }
+
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ ioctl_arg_type arg = (value ? 1 : 0);
+ int result = error_wrapper(::ioctlsocket(s, FIONBIO, &arg), ec);
+#elif defined(__SYMBIAN32__)
+ int result = error_wrapper(::fcntl(s, F_GETFL, 0), ec);
+ if (result >= 0)
+ {
+ clear_last_error();
+ int flag = (value ? (result | O_NONBLOCK) : (result & ~O_NONBLOCK));
+ result = error_wrapper(::fcntl(s, F_SETFL, flag), ec);
+ }
+#else
+ ioctl_arg_type arg = (value ? 1 : 0);
+ int result = error_wrapper(::ioctl(s, FIONBIO, &arg), ec);
+#endif
+
+ if (result >= 0)
+ {
+ ec = boost::system::error_code();
+ if (value)
+ state |= user_set_non_blocking;
+ else
+ {
+ // Clearing the user-set non-blocking mode always overrides any
+ // internally-set non-blocking flag. Any subsequent asynchronous
+ // operations will need to re-enable non-blocking I/O.
+ state &= ~(user_set_non_blocking | internal_non_blocking);
+ }
+ return true;
+ }
+
+ return false;
+}
+
+bool set_internal_non_blocking(socket_type s,
+ state_type& state, bool value, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return false;
+ }
+
+ if (!value && (state & user_set_non_blocking))
+ {
+ // It does not make sense to clear the internal non-blocking flag if the
+ // user still wants non-blocking behaviour. Return an error and let the
+ // caller figure out whether to update the user-set non-blocking flag.
+ ec = boost::asio::error::invalid_argument;
+ return false;
+ }
+
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ ioctl_arg_type arg = (value ? 1 : 0);
+ int result = error_wrapper(::ioctlsocket(s, FIONBIO, &arg), ec);
+#elif defined(__SYMBIAN32__)
+ int result = error_wrapper(::fcntl(s, F_GETFL, 0), ec);
+ if (result >= 0)
+ {
+ clear_last_error();
+ int flag = (value ? (result | O_NONBLOCK) : (result & ~O_NONBLOCK));
+ result = error_wrapper(::fcntl(s, F_SETFL, flag), ec);
+ }
+#else
+ ioctl_arg_type arg = (value ? 1 : 0);
+ int result = error_wrapper(::ioctl(s, FIONBIO, &arg), ec);
+#endif
+
+ if (result >= 0)
+ {
+ ec = boost::system::error_code();
+ if (value)
+ state |= internal_non_blocking;
+ else
+ state &= ~internal_non_blocking;
+ return true;
+ }
+
+ return false;
+}
+
+int shutdown(socket_type s, int what, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+ clear_last_error();
+ int result = error_wrapper(::shutdown(s, what), ec);
+ if (result == 0)
+ ec = boost::system::error_code();
+ return result;
+}
+
+template <typename SockLenType>
+inline int call_connect(SockLenType msghdr::*,
+ socket_type s, const socket_addr_type* addr, std::size_t addrlen)
+{
+ return ::connect(s, addr, (SockLenType)addrlen);
+}
+
+int connect(socket_type s, const socket_addr_type* addr,
+ std::size_t addrlen, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+ clear_last_error();
+ int result = error_wrapper(call_connect(
+ &msghdr::msg_namelen, s, addr, addrlen), ec);
+ if (result == 0)
+ ec = boost::system::error_code();
+#if defined(__linux__)
+ else if (ec == boost::asio::error::try_again)
+ ec = boost::asio::error::no_buffer_space;
+#endif // defined(__linux__)
+ return result;
+}
+
+void sync_connect(socket_type s, const socket_addr_type* addr,
+ std::size_t addrlen, boost::system::error_code& ec)
+{
+ // Perform the connect operation.
+ socket_ops::connect(s, addr, addrlen, ec);
+ if (ec != boost::asio::error::in_progress
+ && ec != boost::asio::error::would_block)
+ {
+ // The connect operation finished immediately.
+ return;
+ }
+
+ // Wait for socket to become ready.
+ if (socket_ops::poll_connect(s, ec) < 0)
+ return;
+
+ // Get the error code from the connect operation.
+ int connect_error = 0;
+ size_t connect_error_len = sizeof(connect_error);
+ if (socket_ops::getsockopt(s, 0, SOL_SOCKET, SO_ERROR,
+ &connect_error, &connect_error_len, ec) == socket_error_retval)
+ return;
+
+ // Return the result of the connect operation.
+ ec = boost::system::error_code(connect_error,
+ boost::asio::error::get_system_category());
+}
+
+bool non_blocking_connect(socket_type s, boost::system::error_code& 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(s, 0, SOL_SOCKET, SO_ERROR,
+ &connect_error, &connect_error_len, ec) == 0)
+ {
+ if (connect_error)
+ {
+ ec = boost::system::error_code(connect_error,
+ boost::asio::error::get_system_category());
+ }
+ else
+ ec = boost::system::error_code();
+ }
+
+ return true;
+}
+
+int socketpair(int af, int type, int protocol,
+ socket_type sv[2], boost::system::error_code& ec)
+{
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ (void)(af);
+ (void)(type);
+ (void)(protocol);
+ (void)(sv);
+ ec = boost::asio::error::operation_not_supported;
+ return socket_error_retval;
+#else
+ clear_last_error();
+ int result = error_wrapper(::socketpair(af, type, protocol, sv), ec);
+ if (result == 0)
+ ec = boost::system::error_code();
+ return result;
+#endif
+}
+
+bool sockatmark(socket_type s, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return false;
+ }
+
+#if defined(SIOCATMARK)
+ ioctl_arg_type value = 0;
+# if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ int result = error_wrapper(::ioctlsocket(s, SIOCATMARK, &value), ec);
+# else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ int result = error_wrapper(::ioctl(s, SIOCATMARK, &value), ec);
+# endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ if (result == 0)
+ ec = boost::system::error_code();
+# if defined(ENOTTY)
+ if (ec.value() == ENOTTY)
+ ec = boost::asio::error::not_socket;
+# endif // defined(ENOTTY)
+#else // defined(SIOCATMARK)
+ int value = error_wrapper(::sockatmark(s), ec);
+ if (value != -1)
+ ec = boost::system::error_code();
+#endif // defined(SIOCATMARK)
+
+ return ec ? false : value != 0;
+}
+
+size_t available(socket_type s, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ ioctl_arg_type value = 0;
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ int result = error_wrapper(::ioctlsocket(s, FIONREAD, &value), ec);
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ int result = error_wrapper(::ioctl(s, FIONREAD, &value), ec);
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ if (result == 0)
+ ec = boost::system::error_code();
+#if defined(ENOTTY)
+ if (ec.value() == ENOTTY)
+ ec = boost::asio::error::not_socket;
+#endif // defined(ENOTTY)
+
+ return ec ? static_cast<size_t>(0) : static_cast<size_t>(value);
+}
+
+int listen(socket_type s, int backlog, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+ clear_last_error();
+ int result = error_wrapper(::listen(s, backlog), ec);
+ if (result == 0)
+ ec = boost::system::error_code();
+ return result;
+}
+
+inline void init_buf_iov_base(void*& base, void* addr)
+{
+ base = addr;
+}
+
+template <typename T>
+inline void init_buf_iov_base(T& base, void* addr)
+{
+ base = static_cast<T>(addr);
+}
+
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+typedef WSABUF buf;
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+typedef iovec buf;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+
+void init_buf(buf& b, void* data, size_t size)
+{
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ b.buf = static_cast<char*>(data);
+ b.len = static_cast<u_long>(size);
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ init_buf_iov_base(b.iov_base, data);
+ b.iov_len = size;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+}
+
+void init_buf(buf& b, const void* data, size_t size)
+{
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ b.buf = static_cast<char*>(const_cast<void*>(data));
+ b.len = static_cast<u_long>(size);
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ init_buf_iov_base(b.iov_base, const_cast<void*>(data));
+ b.iov_len = size;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+}
+
+inline void init_msghdr_msg_name(void*& name, socket_addr_type* addr)
+{
+ name = addr;
+}
+
+inline void init_msghdr_msg_name(void*& name, const socket_addr_type* addr)
+{
+ name = const_cast<socket_addr_type*>(addr);
+}
+
+template <typename T>
+inline void init_msghdr_msg_name(T& name, socket_addr_type* addr)
+{
+ name = reinterpret_cast<T>(addr);
+}
+
+template <typename T>
+inline void init_msghdr_msg_name(T& name, const socket_addr_type* addr)
+{
+ name = reinterpret_cast<T>(const_cast<socket_addr_type*>(addr));
+}
+
+int recv(socket_type s, buf* bufs, size_t count, int flags,
+ boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ // Receive some data.
+ DWORD recv_buf_count = static_cast<DWORD>(count);
+ DWORD bytes_transferred = 0;
+ DWORD recv_flags = flags;
+ int result = error_wrapper(::WSARecv(s, bufs,
+ recv_buf_count, &bytes_transferred, &recv_flags, 0, 0), ec);
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ ec = boost::asio::error::connection_reset;
+ else if (ec.value() == ERROR_PORT_UNREACHABLE)
+ ec = boost::asio::error::connection_refused;
+ if (result != 0)
+ return socket_error_retval;
+ ec = boost::system::error_code();
+ return bytes_transferred;
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ msghdr msg = msghdr();
+ msg.msg_iov = bufs;
+ msg.msg_iovlen = count;
+ int result = error_wrapper(::recvmsg(s, &msg, flags), ec);
+ if (result >= 0)
+ ec = boost::system::error_code();
+ return result;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+}
+
+size_t sync_recv(socket_type s, state_type state, buf* bufs,
+ size_t count, int flags, bool all_empty, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // A request to read 0 bytes on a stream is a no-op.
+ if (all_empty && (state & stream_oriented))
+ {
+ ec = boost::system::error_code();
+ return 0;
+ }
+
+ // Read some data.
+ for (;;)
+ {
+ // Try to complete the operation without blocking.
+ int bytes = socket_ops::recv(s, bufs, count, flags, ec);
+
+ // Check if operation succeeded.
+ if (bytes > 0)
+ return bytes;
+
+ // Check for EOF.
+ if ((state & stream_oriented) && bytes == 0)
+ {
+ ec = boost::asio::error::eof;
+ return 0;
+ }
+
+ // Operation failed.
+ if ((state & 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(s, 0, ec) < 0)
+ return 0;
+ }
+}
+
+#if defined(BOOST_ASIO_HAS_IOCP)
+
+void complete_iocp_recv(state_type state,
+ const weak_cancel_token_type& cancel_token, bool all_empty,
+ boost::system::error_code& ec, size_t bytes_transferred)
+{
+ // Map non-portable errors to their portable counterparts.
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ {
+ if (cancel_token.expired())
+ ec = boost::asio::error::operation_aborted;
+ else
+ ec = boost::asio::error::connection_reset;
+ }
+ else if (ec.value() == ERROR_PORT_UNREACHABLE)
+ {
+ ec = boost::asio::error::connection_refused;
+ }
+
+ // Check for connection closed.
+ else if (!ec && bytes_transferred == 0
+ && (state & stream_oriented) != 0
+ && !all_empty)
+ {
+ ec = boost::asio::error::eof;
+ }
+}
+
+#else // defined(BOOST_ASIO_HAS_IOCP)
+
+bool non_blocking_recv(socket_type s,
+ buf* bufs, size_t count, int flags, bool is_stream,
+ boost::system::error_code& ec, size_t& bytes_transferred)
+{
+ for (;;)
+ {
+ // Read some data.
+ int bytes = socket_ops::recv(s, bufs, count, flags, ec);
+
+ // Check for end of stream.
+ if (is_stream && bytes == 0)
+ {
+ ec = boost::asio::error::eof;
+ return true;
+ }
+
+ // Retry operation if interrupted by signal.
+ if (ec == boost::asio::error::interrupted)
+ continue;
+
+ // Check if we need to run the operation again.
+ if (ec == boost::asio::error::would_block
+ || ec == boost::asio::error::try_again)
+ return false;
+
+ // Operation is complete.
+ if (bytes >= 0)
+ {
+ ec = boost::system::error_code();
+ bytes_transferred = bytes;
+ }
+ else
+ bytes_transferred = 0;
+
+ return true;
+ }
+}
+
+#endif // defined(BOOST_ASIO_HAS_IOCP)
+
+int recvfrom(socket_type s, buf* bufs, size_t count, int flags,
+ socket_addr_type* addr, std::size_t* addrlen,
+ boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ // Receive some data.
+ DWORD recv_buf_count = static_cast<DWORD>(count);
+ DWORD bytes_transferred = 0;
+ DWORD recv_flags = flags;
+ int tmp_addrlen = (int)*addrlen;
+ int result = error_wrapper(::WSARecvFrom(s, bufs, recv_buf_count,
+ &bytes_transferred, &recv_flags, addr, &tmp_addrlen, 0, 0), ec);
+ *addrlen = (std::size_t)tmp_addrlen;
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ ec = boost::asio::error::connection_reset;
+ else if (ec.value() == ERROR_PORT_UNREACHABLE)
+ ec = boost::asio::error::connection_refused;
+ if (result != 0)
+ return socket_error_retval;
+ ec = boost::system::error_code();
+ return bytes_transferred;
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ msghdr msg = msghdr();
+ init_msghdr_msg_name(msg.msg_name, addr);
+ msg.msg_namelen = *addrlen;
+ msg.msg_iov = bufs;
+ msg.msg_iovlen = count;
+ int result = error_wrapper(::recvmsg(s, &msg, flags), ec);
+ *addrlen = msg.msg_namelen;
+ if (result >= 0)
+ ec = boost::system::error_code();
+ return result;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+}
+
+size_t sync_recvfrom(socket_type s, state_type state, buf* bufs,
+ size_t count, int flags, socket_addr_type* addr,
+ std::size_t* addrlen, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Read some data.
+ for (;;)
+ {
+ // Try to complete the operation without blocking.
+ int bytes = socket_ops::recvfrom(s, bufs, count, flags, addr, addrlen, ec);
+
+ // Check if operation succeeded.
+ if (bytes >= 0)
+ return bytes;
+
+ // Operation failed.
+ if ((state & 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(s, 0, ec) < 0)
+ return 0;
+ }
+}
+
+#if defined(BOOST_ASIO_HAS_IOCP)
+
+void complete_iocp_recvfrom(
+ const weak_cancel_token_type& cancel_token,
+ boost::system::error_code& ec)
+{
+ // Map non-portable errors to their portable counterparts.
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ {
+ if (cancel_token.expired())
+ ec = boost::asio::error::operation_aborted;
+ else
+ ec = boost::asio::error::connection_reset;
+ }
+ else if (ec.value() == ERROR_PORT_UNREACHABLE)
+ {
+ ec = boost::asio::error::connection_refused;
+ }
+}
+
+#else // defined(BOOST_ASIO_HAS_IOCP)
+
+bool non_blocking_recvfrom(socket_type s,
+ buf* bufs, size_t count, int flags,
+ socket_addr_type* addr, std::size_t* addrlen,
+ boost::system::error_code& ec, size_t& bytes_transferred)
+{
+ for (;;)
+ {
+ // Read some data.
+ int bytes = socket_ops::recvfrom(s, bufs, count, flags, addr, addrlen, ec);
+
+ // Retry operation if interrupted by signal.
+ if (ec == boost::asio::error::interrupted)
+ continue;
+
+ // Check if we need to run the operation again.
+ if (ec == boost::asio::error::would_block
+ || ec == boost::asio::error::try_again)
+ return false;
+
+ // Operation is complete.
+ if (bytes >= 0)
+ {
+ ec = boost::system::error_code();
+ bytes_transferred = bytes;
+ }
+ else
+ bytes_transferred = 0;
+
+ return true;
+ }
+}
+
+#endif // defined(BOOST_ASIO_HAS_IOCP)
+
+int recvmsg(socket_type s, buf* bufs, size_t count,
+ int in_flags, int& out_flags, boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ out_flags = 0;
+ return socket_ops::recv(s, bufs, count, in_flags, ec);
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ msghdr msg = msghdr();
+ msg.msg_iov = bufs;
+ msg.msg_iovlen = count;
+ int result = error_wrapper(::recvmsg(s, &msg, in_flags), ec);
+ if (result >= 0)
+ {
+ ec = boost::system::error_code();
+ out_flags = msg.msg_flags;
+ }
+ else
+ out_flags = 0;
+ return result;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+}
+
+size_t sync_recvmsg(socket_type s, state_type state,
+ buf* bufs, size_t count, int in_flags, int& out_flags,
+ boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Read some data.
+ for (;;)
+ {
+ // Try to complete the operation without blocking.
+ int bytes = socket_ops::recvmsg(s, bufs, count, in_flags, out_flags, ec);
+
+ // Check if operation succeeded.
+ if (bytes >= 0)
+ return bytes;
+
+ // Operation failed.
+ if ((state & 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(s, 0, ec) < 0)
+ return 0;
+ }
+}
+
+#if defined(BOOST_ASIO_HAS_IOCP)
+
+void complete_iocp_recvmsg(
+ const weak_cancel_token_type& cancel_token,
+ boost::system::error_code& ec)
+{
+ // Map non-portable errors to their portable counterparts.
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ {
+ if (cancel_token.expired())
+ ec = boost::asio::error::operation_aborted;
+ else
+ ec = boost::asio::error::connection_reset;
+ }
+ else if (ec.value() == ERROR_PORT_UNREACHABLE)
+ {
+ ec = boost::asio::error::connection_refused;
+ }
+}
+
+#else // defined(BOOST_ASIO_HAS_IOCP)
+
+bool non_blocking_recvmsg(socket_type s,
+ buf* bufs, size_t count, int in_flags, int& out_flags,
+ boost::system::error_code& ec, size_t& bytes_transferred)
+{
+ for (;;)
+ {
+ // Read some data.
+ int bytes = socket_ops::recvmsg(s, bufs, count, in_flags, out_flags, ec);
+
+ // Retry operation if interrupted by signal.
+ if (ec == boost::asio::error::interrupted)
+ continue;
+
+ // Check if we need to run the operation again.
+ if (ec == boost::asio::error::would_block
+ || ec == boost::asio::error::try_again)
+ return false;
+
+ // Operation is complete.
+ if (bytes >= 0)
+ {
+ ec = boost::system::error_code();
+ bytes_transferred = bytes;
+ }
+ else
+ bytes_transferred = 0;
+
+ return true;
+ }
+}
+
+#endif // defined(BOOST_ASIO_HAS_IOCP)
+
+int send(socket_type s, const buf* bufs, size_t count, int flags,
+ boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ // Send the data.
+ DWORD send_buf_count = static_cast<DWORD>(count);
+ DWORD bytes_transferred = 0;
+ DWORD send_flags = flags;
+ int result = error_wrapper(::WSASend(s, const_cast<buf*>(bufs),
+ send_buf_count, &bytes_transferred, send_flags, 0, 0), ec);
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ ec = boost::asio::error::connection_reset;
+ else if (ec.value() == ERROR_PORT_UNREACHABLE)
+ ec = boost::asio::error::connection_refused;
+ if (result != 0)
+ return socket_error_retval;
+ ec = boost::system::error_code();
+ return bytes_transferred;
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ msghdr msg = msghdr();
+ msg.msg_iov = const_cast<buf*>(bufs);
+ msg.msg_iovlen = count;
+#if defined(__linux__)
+ flags |= MSG_NOSIGNAL;
+#endif // defined(__linux__)
+ int result = error_wrapper(::sendmsg(s, &msg, flags), ec);
+ if (result >= 0)
+ ec = boost::system::error_code();
+ return result;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+}
+
+size_t sync_send(socket_type s, state_type state, const buf* bufs,
+ size_t count, int flags, bool all_empty, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // A request to write 0 bytes to a stream is a no-op.
+ if (all_empty && (state & stream_oriented))
+ {
+ ec = boost::system::error_code();
+ return 0;
+ }
+
+ // Read some data.
+ for (;;)
+ {
+ // Try to complete the operation without blocking.
+ int bytes = socket_ops::send(s, bufs, count, flags, ec);
+
+ // Check if operation succeeded.
+ if (bytes >= 0)
+ return bytes;
+
+ // Operation failed.
+ if ((state & 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(s, 0, ec) < 0)
+ return 0;
+ }
+}
+
+#if defined(BOOST_ASIO_HAS_IOCP)
+
+void complete_iocp_send(
+ const weak_cancel_token_type& cancel_token,
+ boost::system::error_code& ec)
+{
+ // Map non-portable errors to their portable counterparts.
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ {
+ if (cancel_token.expired())
+ ec = boost::asio::error::operation_aborted;
+ else
+ ec = boost::asio::error::connection_reset;
+ }
+ else if (ec.value() == ERROR_PORT_UNREACHABLE)
+ {
+ ec = boost::asio::error::connection_refused;
+ }
+}
+
+#else // defined(BOOST_ASIO_HAS_IOCP)
+
+bool non_blocking_send(socket_type s,
+ const buf* bufs, size_t count, int flags,
+ boost::system::error_code& ec, size_t& bytes_transferred)
+{
+ for (;;)
+ {
+ // Write some data.
+ int bytes = socket_ops::send(s, bufs, count, flags, ec);
+
+ // Retry operation if interrupted by signal.
+ if (ec == boost::asio::error::interrupted)
+ continue;
+
+ // Check if we need to run the operation again.
+ if (ec == boost::asio::error::would_block
+ || ec == boost::asio::error::try_again)
+ return false;
+
+ // Operation is complete.
+ if (bytes >= 0)
+ {
+ ec = boost::system::error_code();
+ bytes_transferred = bytes;
+ }
+ else
+ bytes_transferred = 0;
+
+ return true;
+ }
+}
+
+#endif // defined(BOOST_ASIO_HAS_IOCP)
+
+int sendto(socket_type s, const buf* bufs, size_t count, int flags,
+ const socket_addr_type* addr, std::size_t addrlen,
+ boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ // Send the data.
+ DWORD send_buf_count = static_cast<DWORD>(count);
+ DWORD bytes_transferred = 0;
+ int result = error_wrapper(::WSASendTo(s, const_cast<buf*>(bufs),
+ send_buf_count, &bytes_transferred, flags, addr,
+ static_cast<int>(addrlen), 0, 0), ec);
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ ec = boost::asio::error::connection_reset;
+ else if (ec.value() == ERROR_PORT_UNREACHABLE)
+ ec = boost::asio::error::connection_refused;
+ if (result != 0)
+ return socket_error_retval;
+ ec = boost::system::error_code();
+ return bytes_transferred;
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ msghdr msg = msghdr();
+ init_msghdr_msg_name(msg.msg_name, addr);
+ msg.msg_namelen = addrlen;
+ msg.msg_iov = const_cast<buf*>(bufs);
+ msg.msg_iovlen = count;
+#if defined(__linux__)
+ flags |= MSG_NOSIGNAL;
+#endif // defined(__linux__)
+ int result = error_wrapper(::sendmsg(s, &msg, flags), ec);
+ if (result >= 0)
+ ec = boost::system::error_code();
+ return result;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+}
+
+size_t sync_sendto(socket_type s, state_type state, const buf* bufs,
+ size_t count, int flags, const socket_addr_type* addr,
+ std::size_t addrlen, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Write some data.
+ for (;;)
+ {
+ // Try to complete the operation without blocking.
+ int bytes = socket_ops::sendto(s, bufs, count, flags, addr, addrlen, ec);
+
+ // Check if operation succeeded.
+ if (bytes >= 0)
+ return bytes;
+
+ // Operation failed.
+ if ((state & 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(s, 0, ec) < 0)
+ return 0;
+ }
+}
+
+#if !defined(BOOST_ASIO_HAS_IOCP)
+
+bool non_blocking_sendto(socket_type s,
+ const buf* bufs, size_t count, int flags,
+ const socket_addr_type* addr, std::size_t addrlen,
+ boost::system::error_code& ec, size_t& bytes_transferred)
+{
+ for (;;)
+ {
+ // Write some data.
+ int bytes = socket_ops::sendto(s, bufs, count, flags, addr, addrlen, ec);
+
+ // Retry operation if interrupted by signal.
+ if (ec == boost::asio::error::interrupted)
+ continue;
+
+ // Check if we need to run the operation again.
+ if (ec == boost::asio::error::would_block
+ || ec == boost::asio::error::try_again)
+ return false;
+
+ // Operation is complete.
+ if (bytes >= 0)
+ {
+ ec = boost::system::error_code();
+ bytes_transferred = bytes;
+ }
+ else
+ bytes_transferred = 0;
+
+ return true;
+ }
+}
+
+#endif // !defined(BOOST_ASIO_HAS_IOCP)
+
+socket_type socket(int af, int type, int protocol,
+ boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ socket_type s = error_wrapper(::WSASocket(af, type, protocol, 0, 0,
+ WSA_FLAG_OVERLAPPED), ec);
+ if (s == invalid_socket)
+ return s;
+
+ if (af == AF_INET6)
+ {
+ // Try to enable the POSIX default behaviour of having IPV6_V6ONLY set to
+ // false. This will only succeed on Windows Vista and later versions of
+ // Windows, where a dual-stack IPv4/v6 implementation is available.
+ DWORD optval = 0;
+ ::setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
+ reinterpret_cast<const char*>(&optval), sizeof(optval));
+ }
+
+ ec = boost::system::error_code();
+
+ return s;
+#elif defined(__MACH__) && defined(__APPLE__) || defined(__FreeBSD__)
+ socket_type s = error_wrapper(::socket(af, type, protocol), ec);
+ if (s == invalid_socket)
+ return s;
+
+ int optval = 1;
+ int result = error_wrapper(::setsockopt(s,
+ SOL_SOCKET, SO_NOSIGPIPE, &optval, sizeof(optval)), ec);
+ if (result != 0)
+ {
+ ::close(s);
+ return invalid_socket;
+ }
+
+ return s;
+#else
+ int s = error_wrapper(::socket(af, type, protocol), ec);
+ if (s >= 0)
+ ec = boost::system::error_code();
+ return s;
+#endif
+}
+
+template <typename SockLenType>
+inline int call_setsockopt(SockLenType msghdr::*,
+ socket_type s, int level, int optname,
+ const void* optval, std::size_t optlen)
+{
+ return ::setsockopt(s, level, optname,
+ (const char*)optval, (SockLenType)optlen);
+}
+
+int setsockopt(socket_type s, state_type& state, int level, int optname,
+ const void* optval, std::size_t optlen, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+ if (level == custom_socket_option_level && optname == always_fail_option)
+ {
+ ec = boost::asio::error::invalid_argument;
+ return socket_error_retval;
+ }
+
+ if (level == custom_socket_option_level
+ && optname == enable_connection_aborted_option)
+ {
+ if (optlen != sizeof(int))
+ {
+ ec = boost::asio::error::invalid_argument;
+ return socket_error_retval;
+ }
+
+ if (*static_cast<const int*>(optval))
+ state |= enable_connection_aborted;
+ else
+ state &= ~enable_connection_aborted;
+ ec = boost::system::error_code();
+ return 0;
+ }
+
+ if (level == SOL_SOCKET && optname == SO_LINGER)
+ state |= user_set_linger;
+
+#if defined(__BORLANDC__)
+ // Mysteriously, using the getsockopt and setsockopt functions directly with
+ // Borland C++ results in incorrect values being set and read. The bug can be
+ // worked around by using function addresses resolved with GetProcAddress.
+ if (HMODULE winsock_module = ::GetModuleHandleA("ws2_32"))
+ {
+ typedef int (WSAAPI *sso_t)(SOCKET, int, int, const char*, int);
+ if (sso_t sso = (sso_t)::GetProcAddress(winsock_module, "setsockopt"))
+ {
+ clear_last_error();
+ return error_wrapper(sso(s, level, optname,
+ reinterpret_cast<const char*>(optval),
+ static_cast<int>(optlen)), ec);
+ }
+ }
+ ec = boost::asio::error::fault;
+ return socket_error_retval;
+#else // defined(__BORLANDC__)
+ clear_last_error();
+ int result = error_wrapper(call_setsockopt(&msghdr::msg_namelen,
+ s, level, optname, optval, optlen), ec);
+ if (result == 0)
+ {
+ ec = boost::system::error_code();
+
+#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 ((state & datagram_oriented)
+ && level == SOL_SOCKET && optname == SO_REUSEADDR)
+ {
+ call_setsockopt(&msghdr::msg_namelen, s,
+ SOL_SOCKET, SO_REUSEPORT, optval, optlen);
+ }
+#endif
+ }
+
+ return result;
+#endif // defined(__BORLANDC__)
+}
+
+template <typename SockLenType>
+inline int call_getsockopt(SockLenType msghdr::*,
+ socket_type s, int level, int optname,
+ void* optval, std::size_t* optlen)
+{
+ SockLenType tmp_optlen = (SockLenType)*optlen;
+ int result = ::getsockopt(s, level, optname, (char*)optval, &tmp_optlen);
+ *optlen = (std::size_t)tmp_optlen;
+ return result;
+}
+
+int getsockopt(socket_type s, state_type state, int level, int optname,
+ void* optval, size_t* optlen, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+ if (level == custom_socket_option_level && optname == always_fail_option)
+ {
+ ec = boost::asio::error::invalid_argument;
+ return socket_error_retval;
+ }
+
+ if (level == custom_socket_option_level
+ && optname == enable_connection_aborted_option)
+ {
+ if (*optlen != sizeof(int))
+ {
+ ec = boost::asio::error::invalid_argument;
+ return socket_error_retval;
+ }
+
+ *static_cast<int*>(optval) = (state & enable_connection_aborted) ? 1 : 0;
+ ec = boost::system::error_code();
+ return 0;
+ }
+
+#if defined(__BORLANDC__)
+ // Mysteriously, using the getsockopt and setsockopt functions directly with
+ // Borland C++ results in incorrect values being set and read. The bug can be
+ // worked around by using function addresses resolved with GetProcAddress.
+ if (HMODULE winsock_module = ::GetModuleHandleA("ws2_32"))
+ {
+ typedef int (WSAAPI *gso_t)(SOCKET, int, int, char*, int*);
+ if (gso_t gso = (gso_t)::GetProcAddress(winsock_module, "getsockopt"))
+ {
+ clear_last_error();
+ int tmp_optlen = static_cast<int>(*optlen);
+ int result = error_wrapper(gso(s, level, optname,
+ reinterpret_cast<char*>(optval), &tmp_optlen), ec);
+ *optlen = static_cast<size_t>(tmp_optlen);
+ if (result != 0 && level == IPPROTO_IPV6 && optname == IPV6_V6ONLY
+ && ec.value() == WSAENOPROTOOPT && *optlen == sizeof(DWORD))
+ {
+ // Dual-stack IPv4/v6 sockets, and the IPV6_V6ONLY socket option, are
+ // only supported on Windows Vista and later. To simplify program logic
+ // we will fake success of getting this option and specify that the
+ // value is non-zero (i.e. true). This corresponds to the behavior of
+ // IPv6 sockets on Windows platforms pre-Vista.
+ *static_cast<DWORD*>(optval) = 1;
+ ec = boost::system::error_code();
+ }
+ return result;
+ }
+ }
+ ec = boost::asio::error::fault;
+ return socket_error_retval;
+#elif defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ clear_last_error();
+ int result = error_wrapper(call_getsockopt(&msghdr::msg_namelen,
+ s, level, optname, optval, optlen), ec);
+ if (result != 0 && level == IPPROTO_IPV6 && optname == IPV6_V6ONLY
+ && ec.value() == WSAENOPROTOOPT && *optlen == sizeof(DWORD))
+ {
+ // Dual-stack IPv4/v6 sockets, and the IPV6_V6ONLY socket option, are only
+ // supported on Windows Vista and later. To simplify program logic we will
+ // fake success of getting this option and specify that the value is
+ // non-zero (i.e. true). This corresponds to the behavior of IPv6 sockets
+ // on Windows platforms pre-Vista.
+ *static_cast<DWORD*>(optval) = 1;
+ ec = boost::system::error_code();
+ }
+ if (result == 0)
+ ec = boost::system::error_code();
+ return result;
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ clear_last_error();
+ int result = error_wrapper(call_getsockopt(&msghdr::msg_namelen,
+ s, level, optname, optval, optlen), ec);
+#if defined(__linux__)
+ if (result == 0 && level == SOL_SOCKET && *optlen == sizeof(int)
+ && (optname == SO_SNDBUF || optname == SO_RCVBUF))
+ {
+ // On Linux, setting SO_SNDBUF or SO_RCVBUF to N actually causes the kernel
+ // to set the buffer size to N*2. Linux puts additional stuff into the
+ // buffers so that only about half is actually available to the application.
+ // The retrieved value is divided by 2 here to make it appear as though the
+ // correct value has been set.
+ *static_cast<int*>(optval) /= 2;
+ }
+#endif // defined(__linux__)
+ if (result == 0)
+ ec = boost::system::error_code();
+ return result;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+}
+
+template <typename SockLenType>
+inline int call_getpeername(SockLenType msghdr::*,
+ socket_type s, socket_addr_type* addr, std::size_t* addrlen)
+{
+ SockLenType tmp_addrlen = (SockLenType)*addrlen;
+ int result = ::getpeername(s, addr, &tmp_addrlen);
+ *addrlen = (std::size_t)tmp_addrlen;
+ return result;
+}
+
+int getpeername(socket_type s, socket_addr_type* addr,
+ std::size_t* addrlen, bool cached, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ if (cached)
+ {
+ // Check if socket is still connected.
+ DWORD connect_time = 0;
+ size_t connect_time_len = sizeof(connect_time);
+ if (socket_ops::getsockopt(s, 0, SOL_SOCKET, SO_CONNECT_TIME,
+ &connect_time, &connect_time_len, ec) == socket_error_retval)
+ {
+ return socket_error_retval;
+ }
+ if (connect_time == 0xFFFFFFFF)
+ {
+ ec = boost::asio::error::not_connected;
+ return socket_error_retval;
+ }
+
+ // The cached value is still valid.
+ ec = boost::system::error_code();
+ return 0;
+ }
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ (void)cached;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+
+ clear_last_error();
+ int result = error_wrapper(call_getpeername(
+ &msghdr::msg_namelen, s, addr, addrlen), ec);
+ if (result == 0)
+ ec = boost::system::error_code();
+ return result;
+}
+
+template <typename SockLenType>
+inline int call_getsockname(SockLenType msghdr::*,
+ socket_type s, socket_addr_type* addr, std::size_t* addrlen)
+{
+ SockLenType tmp_addrlen = (SockLenType)*addrlen;
+ int result = ::getsockname(s, addr, &tmp_addrlen);
+ *addrlen = (std::size_t)tmp_addrlen;
+ return result;
+}
+
+int getsockname(socket_type s, socket_addr_type* addr,
+ std::size_t* addrlen, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+ clear_last_error();
+ int result = error_wrapper(call_getsockname(
+ &msghdr::msg_namelen, s, addr, addrlen), ec);
+ if (result == 0)
+ ec = boost::system::error_code();
+ return result;
+}
+
+int ioctl(socket_type s, state_type& state, int cmd,
+ ioctl_arg_type* arg, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ int result = error_wrapper(::ioctlsocket(s, cmd, arg), ec);
+#elif defined(__MACH__) && defined(__APPLE__) \
+ || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
+ int result = error_wrapper(::ioctl(s,
+ static_cast<unsigned int>(cmd), arg), ec);
+#else
+ int result = error_wrapper(::ioctl(s, cmd, arg), ec);
+#endif
+ if (result >= 0)
+ {
+ ec = boost::system::error_code();
+
+ // When updating the non-blocking mode we always perform the ioctl syscall,
+ // even if the flags would otherwise indicate that the socket is already in
+ // the correct state. This ensures that the underlying socket is put into
+ // the state that has been requested by the user. If the ioctl syscall was
+ // successful then we need to update the flags to match.
+ if (cmd == static_cast<int>(FIONBIO))
+ {
+ if (*arg)
+ {
+ state |= user_set_non_blocking;
+ }
+ else
+ {
+ // Clearing the non-blocking mode always overrides any internally-set
+ // non-blocking flag. Any subsequent asynchronous operations will need
+ // to re-enable non-blocking I/O.
+ state &= ~(user_set_non_blocking | internal_non_blocking);
+ }
+ }
+ }
+
+ return result;
+}
+
+int select(int nfds, fd_set* readfds, fd_set* writefds,
+ fd_set* exceptfds, timeval* timeout, boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ if (!readfds && !writefds && !exceptfds && timeout)
+ {
+ DWORD milliseconds = timeout->tv_sec * 1000 + timeout->tv_usec / 1000;
+ if (milliseconds == 0)
+ milliseconds = 1; // Force context switch.
+ ::Sleep(milliseconds);
+ ec = boost::system::error_code();
+ return 0;
+ }
+
+ // The select() call allows timeout values measured in microseconds, but the
+ // system clock (as wrapped by boost::posix_time::microsec_clock) typically
+ // has a resolution of 10 milliseconds. This can lead to a spinning select
+ // reactor, meaning increased CPU usage, when waiting for the earliest
+ // scheduled timeout if it's less than 10 milliseconds away. To avoid a tight
+ // spin we'll use a minimum timeout of 1 millisecond.
+ if (timeout && timeout->tv_sec == 0
+ && timeout->tv_usec > 0 && timeout->tv_usec < 1000)
+ timeout->tv_usec = 1000;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+
+#if defined(__hpux) && defined(__SELECT)
+ timespec ts;
+ ts.tv_sec = timeout ? timeout->tv_sec : 0;
+ ts.tv_nsec = timeout ? timeout->tv_usec * 1000 : 0;
+ return error_wrapper(::pselect(nfds, readfds,
+ writefds, exceptfds, timeout ? &ts : 0, 0), ec);
+#else
+ int result = error_wrapper(::select(nfds, readfds,
+ writefds, exceptfds, timeout), ec);
+ if (result >= 0)
+ ec = boost::system::error_code();
+ return result;
+#endif
+}
+
+int poll_read(socket_type s, state_type state, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+#if defined(BOOST_WINDOWS) \
+ || defined(__CYGWIN__) \
+ || defined(__SYMBIAN32__)
+ fd_set fds;
+ FD_ZERO(&fds);
+ FD_SET(s, &fds);
+ timeval zero_timeout;
+ zero_timeout.tv_sec = 0;
+ zero_timeout.tv_usec = 0;
+ timeval* timeout = (state & user_set_non_blocking) ? &zero_timeout : 0;
+ clear_last_error();
+ int result = error_wrapper(::select(s, &fds, 0, 0, timeout), ec);
+#else // defined(BOOST_WINDOWS)
+ // || defined(__CYGWIN__)
+ // || defined(__SYMBIAN32__)
+ pollfd fds;
+ fds.fd = s;
+ fds.events = POLLIN;
+ fds.revents = 0;
+ int timeout = (state & user_set_non_blocking) ? 0 : -1;
+ clear_last_error();
+ int result = error_wrapper(::poll(&fds, 1, timeout), ec);
+#endif // defined(BOOST_WINDOWS)
+ // || defined(__CYGWIN__)
+ // || defined(__SYMBIAN32__)
+ if (result == 0)
+ ec = (state & user_set_non_blocking)
+ ? boost::asio::error::would_block : boost::system::error_code();
+ else if (result > 0)
+ ec = boost::system::error_code();
+ return result;
+}
+
+int poll_write(socket_type s, state_type state, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+#if defined(BOOST_WINDOWS) \
+ || defined(__CYGWIN__) \
+ || defined(__SYMBIAN32__)
+ fd_set fds;
+ FD_ZERO(&fds);
+ FD_SET(s, &fds);
+ timeval zero_timeout;
+ zero_timeout.tv_sec = 0;
+ zero_timeout.tv_usec = 0;
+ timeval* timeout = (state & user_set_non_blocking) ? &zero_timeout : 0;
+ clear_last_error();
+ int result = error_wrapper(::select(s, 0, &fds, 0, timeout), ec);
+#else // defined(BOOST_WINDOWS)
+ // || defined(__CYGWIN__)
+ // || defined(__SYMBIAN32__)
+ pollfd fds;
+ fds.fd = s;
+ fds.events = POLLOUT;
+ fds.revents = 0;
+ int timeout = (state & user_set_non_blocking) ? 0 : -1;
+ clear_last_error();
+ int result = error_wrapper(::poll(&fds, 1, timeout), ec);
+#endif // defined(BOOST_WINDOWS)
+ // || defined(__CYGWIN__)
+ // || defined(__SYMBIAN32__)
+ if (result == 0)
+ ec = (state & user_set_non_blocking)
+ ? boost::asio::error::would_block : boost::system::error_code();
+ else if (result > 0)
+ ec = boost::system::error_code();
+ return result;
+}
+
+int poll_connect(socket_type s, boost::system::error_code& ec)
+{
+ if (s == invalid_socket)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return socket_error_retval;
+ }
+
+#if defined(BOOST_WINDOWS) \
+ || defined(__CYGWIN__) \
+ || defined(__SYMBIAN32__)
+ fd_set write_fds;
+ FD_ZERO(&write_fds);
+ FD_SET(s, &write_fds);
+ fd_set except_fds;
+ FD_ZERO(&except_fds);
+ FD_SET(s, &except_fds);
+ clear_last_error();
+ int result = error_wrapper(::select(s, 0, &write_fds, &except_fds, 0), ec);
+ if (result >= 0)
+ ec = boost::system::error_code();
+ return result;
+#else // defined(BOOST_WINDOWS)
+ // || defined(__CYGWIN__)
+ // || defined(__SYMBIAN32__)
+ pollfd fds;
+ fds.fd = s;
+ fds.events = POLLOUT;
+ fds.revents = 0;
+ clear_last_error();
+ int result = error_wrapper(::poll(&fds, 1, -1), ec);
+ if (result >= 0)
+ ec = boost::system::error_code();
+ return result;
+#endif // defined(BOOST_WINDOWS)
+ // || defined(__CYGWIN__)
+ // || defined(__SYMBIAN32__)
+}
+
+const char* inet_ntop(int af, const void* src, char* dest, size_t length,
+ unsigned long scope_id, boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ using namespace std; // For memcpy.
+
+ if (af != AF_INET && af != AF_INET6)
+ {
+ ec = boost::asio::error::address_family_not_supported;
+ return 0;
+ }
+
+ union
+ {
+ socket_addr_type base;
+ sockaddr_storage_type storage;
+ sockaddr_in4_type v4;
+ sockaddr_in6_type v6;
+ } address;
+ DWORD address_length;
+ if (af == AF_INET)
+ {
+ address_length = sizeof(sockaddr_in4_type);
+ address.v4.sin_family = AF_INET;
+ address.v4.sin_port = 0;
+ memcpy(&address.v4.sin_addr, src, sizeof(in4_addr_type));
+ }
+ else // AF_INET6
+ {
+ address_length = sizeof(sockaddr_in6_type);
+ address.v6.sin6_family = AF_INET6;
+ address.v6.sin6_port = 0;
+ address.v6.sin6_flowinfo = 0;
+ address.v6.sin6_scope_id = scope_id;
+ memcpy(&address.v6.sin6_addr, src, sizeof(in6_addr_type));
+ }
+
+ DWORD string_length = static_cast<DWORD>(length);
+#if defined(BOOST_NO_ANSI_APIS)
+ LPWSTR string_buffer = (LPWSTR)_alloca(length * sizeof(WCHAR));
+ int result = error_wrapper(::WSAAddressToStringW(&address.base,
+ address_length, 0, string_buffer, &string_length), ec);
+ ::WideCharToMultiByte(CP_ACP, 0, string_buffer, -1, dest, length, 0, 0);
+#else
+ int result = error_wrapper(::WSAAddressToStringA(
+ &address.base, address_length, 0, dest, &string_length), ec);
+#endif
+
+ // Windows may set error code on success.
+ if (result != socket_error_retval)
+ ec = boost::system::error_code();
+
+ // Windows may not set an error code on failure.
+ else if (result == socket_error_retval && !ec)
+ ec = boost::asio::error::invalid_argument;
+
+ return result == socket_error_retval ? 0 : dest;
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ const char* result = error_wrapper(::inet_ntop(af, src, dest, length), ec);
+ if (result == 0 && !ec)
+ ec = boost::asio::error::invalid_argument;
+ if (result != 0 && af == AF_INET6 && scope_id != 0)
+ {
+ using namespace std; // For strcat and sprintf.
+ char if_name[IF_NAMESIZE + 1] = "%";
+ const in6_addr_type* ipv6_address = static_cast<const in6_addr_type*>(src);
+ bool is_link_local = ((ipv6_address->s6_addr[0] == 0xfe)
+ && ((ipv6_address->s6_addr[1] & 0xc0) == 0x80));
+ if (!is_link_local || if_indextoname(scope_id, if_name + 1) == 0)
+ sprintf(if_name + 1, "%lu", scope_id);
+ strcat(dest, if_name);
+ }
+ return result;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+}
+
+int inet_pton(int af, const char* src, void* dest,
+ unsigned long* scope_id, boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ using namespace std; // For memcpy and strcmp.
+
+ if (af != AF_INET && af != AF_INET6)
+ {
+ ec = boost::asio::error::address_family_not_supported;
+ return -1;
+ }
+
+ union
+ {
+ socket_addr_type base;
+ sockaddr_storage_type storage;
+ sockaddr_in4_type v4;
+ sockaddr_in6_type v6;
+ } address;
+ int address_length = sizeof(sockaddr_storage_type);
+#if defined(BOOST_NO_ANSI_APIS)
+ int num_wide_chars = strlen(src) + 1;
+ LPWSTR wide_buffer = (LPWSTR)_alloca(num_wide_chars * sizeof(WCHAR));
+ ::MultiByteToWideChar(CP_ACP, 0, src, -1, wide_buffer, num_wide_chars);
+ int result = error_wrapper(::WSAStringToAddressW(
+ wide_buffer, af, 0, &address.base, &address_length), ec);
+#else
+ int result = error_wrapper(::WSAStringToAddressA(
+ const_cast<char*>(src), af, 0, &address.base, &address_length), ec);
+#endif
+
+ if (af == AF_INET)
+ {
+ if (result != socket_error_retval)
+ {
+ memcpy(dest, &address.v4.sin_addr, sizeof(in4_addr_type));
+ ec = boost::system::error_code();
+ }
+ else if (strcmp(src, "255.255.255.255") == 0)
+ {
+ static_cast<in4_addr_type*>(dest)->s_addr = INADDR_NONE;
+ ec = boost::system::error_code();
+ }
+ }
+ else // AF_INET6
+ {
+ if (result != socket_error_retval)
+ {
+ memcpy(dest, &address.v6.sin6_addr, sizeof(in6_addr_type));
+ if (scope_id)
+ *scope_id = address.v6.sin6_scope_id;
+ ec = boost::system::error_code();
+ }
+ }
+
+ // Windows may not set an error code on failure.
+ if (result == socket_error_retval && !ec)
+ ec = boost::asio::error::invalid_argument;
+
+ if (result != socket_error_retval)
+ ec = boost::system::error_code();
+
+ return result == socket_error_retval ? -1 : 1;
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ int result = error_wrapper(::inet_pton(af, src, dest), ec);
+ if (result <= 0 && !ec)
+ ec = boost::asio::error::invalid_argument;
+ if (result > 0 && af == AF_INET6 && scope_id)
+ {
+ using namespace std; // For strchr and atoi.
+ *scope_id = 0;
+ if (const char* if_name = strchr(src, '%'))
+ {
+ in6_addr_type* ipv6_address = static_cast<in6_addr_type*>(dest);
+ bool is_link_local = ((ipv6_address->s6_addr[0] == 0xfe)
+ && ((ipv6_address->s6_addr[1] & 0xc0) == 0x80));
+ if (is_link_local)
+ *scope_id = if_nametoindex(if_name + 1);
+ if (*scope_id == 0)
+ *scope_id = atoi(if_name + 1);
+ }
+ }
+ return result;
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+}
+
+int gethostname(char* name, int namelen, boost::system::error_code& ec)
+{
+ clear_last_error();
+ int result = error_wrapper(::gethostname(name, namelen), ec);
+#if defined(BOOST_WINDOWS)
+ if (result == 0)
+ ec = boost::system::error_code();
+#endif
+ return result;
+}
+
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__) \
+ || defined(__MACH__) && defined(__APPLE__)
+
+// The following functions are only needed for emulation of getaddrinfo and
+// getnameinfo.
+
+inline boost::system::error_code translate_netdb_error(int error)
+{
+ switch (error)
+ {
+ case 0:
+ return boost::system::error_code();
+ case HOST_NOT_FOUND:
+ return boost::asio::error::host_not_found;
+ case TRY_AGAIN:
+ return boost::asio::error::host_not_found_try_again;
+ case NO_RECOVERY:
+ return boost::asio::error::no_recovery;
+ case NO_DATA:
+ return boost::asio::error::no_data;
+ default:
+ BOOST_ASSERT(false);
+ return boost::asio::error::invalid_argument;
+ }
+}
+
+inline hostent* gethostbyaddr(const char* addr, int length, int af,
+ hostent* result, char* buffer, int buflength, boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ (void)(buffer);
+ (void)(buflength);
+ hostent* retval = error_wrapper(::gethostbyaddr(addr, length, af), ec);
+ if (!retval)
+ return 0;
+ ec = boost::system::error_code();
+ *result = *retval;
+ return retval;
+#elif defined(__sun) || defined(__QNX__)
+ int error = 0;
+ hostent* retval = error_wrapper(::gethostbyaddr_r(addr, length, af, result,
+ buffer, buflength, &error), ec);
+ if (error)
+ ec = translate_netdb_error(error);
+ return retval;
+#elif defined(__MACH__) && defined(__APPLE__)
+ (void)(buffer);
+ (void)(buflength);
+ int error = 0;
+ hostent* retval = error_wrapper(::getipnodebyaddr(
+ addr, length, af, &error), ec);
+ if (error)
+ ec = translate_netdb_error(error);
+ if (!retval)
+ return 0;
+ *result = *retval;
+ return retval;
+#else
+ hostent* retval = 0;
+ int error = 0;
+ error_wrapper(::gethostbyaddr_r(addr, length, af, result, buffer,
+ buflength, &retval, &error), ec);
+ if (error)
+ ec = translate_netdb_error(error);
+ return retval;
+#endif
+}
+
+inline hostent* gethostbyname(const char* name, int af, struct hostent* result,
+ char* buffer, int buflength, int ai_flags, boost::system::error_code& ec)
+{
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ (void)(buffer);
+ (void)(buflength);
+ (void)(ai_flags);
+ if (af != AF_INET)
+ {
+ ec = boost::asio::error::address_family_not_supported;
+ return 0;
+ }
+ hostent* retval = error_wrapper(::gethostbyname(name), ec);
+ if (!retval)
+ return 0;
+ ec = boost::system::error_code();
+ *result = *retval;
+ return result;
+#elif defined(__sun) || defined(__QNX__)
+ (void)(ai_flags);
+ if (af != AF_INET)
+ {
+ ec = boost::asio::error::address_family_not_supported;
+ return 0;
+ }
+ int error = 0;
+ hostent* retval = error_wrapper(::gethostbyname_r(name, result, buffer,
+ buflength, &error), ec);
+ if (error)
+ ec = translate_netdb_error(error);
+ return retval;
+#elif defined(__MACH__) && defined(__APPLE__)
+ (void)(buffer);
+ (void)(buflength);
+ int error = 0;
+ hostent* retval = error_wrapper(::getipnodebyname(
+ name, af, ai_flags, &error), ec);
+ if (error)
+ ec = translate_netdb_error(error);
+ if (!retval)
+ return 0;
+ *result = *retval;
+ return retval;
+#else
+ (void)(ai_flags);
+ if (af != AF_INET)
+ {
+ ec = boost::asio::error::address_family_not_supported;
+ return 0;
+ }
+ hostent* retval = 0;
+ int error = 0;
+ error_wrapper(::gethostbyname_r(name, result,
+ buffer, buflength, &retval, &error), ec);
+ if (error)
+ ec = translate_netdb_error(error);
+ return retval;
+#endif
+}
+
+inline void freehostent(hostent* h)
+{
+#if defined(__MACH__) && defined(__APPLE__)
+ if (h)
+ ::freehostent(h);
+#else
+ (void)(h);
+#endif
+}
+
+// Emulation of getaddrinfo based on implementation in:
+// Stevens, W. R., UNIX Network Programming Vol. 1, 2nd Ed., Prentice-Hall 1998.
+
+struct gai_search
+{
+ const char* host;
+ int family;
+};
+
+inline int gai_nsearch(const char* host,
+ const addrinfo_type* hints, gai_search (&search)[2])
+{
+ int search_count = 0;
+ if (host == 0 || host[0] == '\0')
+ {
+ if (hints->ai_flags & AI_PASSIVE)
+ {
+ // No host and AI_PASSIVE implies wildcard bind.
+ switch (hints->ai_family)
+ {
+ case AF_INET:
+ search[search_count].host = "0.0.0.0";
+ search[search_count].family = AF_INET;
+ ++search_count;
+ break;
+ case AF_INET6:
+ search[search_count].host = "0::0";
+ search[search_count].family = AF_INET6;
+ ++search_count;
+ break;
+ case AF_UNSPEC:
+ search[search_count].host = "0::0";
+ search[search_count].family = AF_INET6;
+ ++search_count;
+ search[search_count].host = "0.0.0.0";
+ search[search_count].family = AF_INET;
+ ++search_count;
+ break;
+ default:
+ break;
+ }
+ }
+ else
+ {
+ // No host and not AI_PASSIVE means connect to local host.
+ switch (hints->ai_family)
+ {
+ case AF_INET:
+ search[search_count].host = "localhost";
+ search[search_count].family = AF_INET;
+ ++search_count;
+ break;
+ case AF_INET6:
+ search[search_count].host = "localhost";
+ search[search_count].family = AF_INET6;
+ ++search_count;
+ break;
+ case AF_UNSPEC:
+ search[search_count].host = "localhost";
+ search[search_count].family = AF_INET6;
+ ++search_count;
+ search[search_count].host = "localhost";
+ search[search_count].family = AF_INET;
+ ++search_count;
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ else
+ {
+ // Host is specified.
+ switch (hints->ai_family)
+ {
+ case AF_INET:
+ search[search_count].host = host;
+ search[search_count].family = AF_INET;
+ ++search_count;
+ break;
+ case AF_INET6:
+ search[search_count].host = host;
+ search[search_count].family = AF_INET6;
+ ++search_count;
+ break;
+ case AF_UNSPEC:
+ search[search_count].host = host;
+ search[search_count].family = AF_INET6;
+ ++search_count;
+ search[search_count].host = host;
+ search[search_count].family = AF_INET;
+ ++search_count;
+ break;
+ default:
+ break;
+ }
+ }
+ return search_count;
+}
+
+template <typename T>
+inline T* gai_alloc(std::size_t size = sizeof(T))
+{
+ using namespace std;
+ T* p = static_cast<T*>(::operator new(size, std::nothrow));
+ if (p)
+ memset(p, 0, size);
+ return p;
+}
+
+inline void gai_free(void* p)
+{
+ ::operator delete(p);
+}
+
+inline void gai_strcpy(char* target, const char* source, std::size_t max_size)
+{
+ using namespace std;
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(UNDER_CE)
+ strcpy_s(target, max_size, source);
+#else
+ *target = 0;
+ strncat(target, source, max_size);
+#endif
+}
+
+enum { gai_clone_flag = 1 << 30 };
+
+inline int gai_aistruct(addrinfo_type*** next, const addrinfo_type* hints,
+ const void* addr, int family)
+{
+ using namespace std;
+
+ addrinfo_type* ai = gai_alloc<addrinfo_type>();
+ if (ai == 0)
+ return EAI_MEMORY;
+
+ ai->ai_next = 0;
+ **next = ai;
+ *next = &ai->ai_next;
+
+ ai->ai_canonname = 0;
+ ai->ai_socktype = hints->ai_socktype;
+ if (ai->ai_socktype == 0)
+ ai->ai_flags |= gai_clone_flag;
+ ai->ai_protocol = hints->ai_protocol;
+ ai->ai_family = family;
+
+ switch (ai->ai_family)
+ {
+ case AF_INET:
+ {
+ sockaddr_in4_type* sinptr = gai_alloc<sockaddr_in4_type>();
+ if (sinptr == 0)
+ return EAI_MEMORY;
+ sinptr->sin_family = AF_INET;
+ memcpy(&sinptr->sin_addr, addr, sizeof(in4_addr_type));
+ ai->ai_addr = reinterpret_cast<sockaddr*>(sinptr);
+ ai->ai_addrlen = sizeof(sockaddr_in4_type);
+ break;
+ }
+ case AF_INET6:
+ {
+ sockaddr_in6_type* sin6ptr = gai_alloc<sockaddr_in6_type>();
+ if (sin6ptr == 0)
+ return EAI_MEMORY;
+ sin6ptr->sin6_family = AF_INET6;
+ memcpy(&sin6ptr->sin6_addr, addr, sizeof(in6_addr_type));
+ ai->ai_addr = reinterpret_cast<sockaddr*>(sin6ptr);
+ ai->ai_addrlen = sizeof(sockaddr_in6_type);
+ break;
+ }
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+inline addrinfo_type* gai_clone(addrinfo_type* ai)
+{
+ using namespace std;
+
+ addrinfo_type* new_ai = gai_alloc<addrinfo_type>();
+ if (new_ai == 0)
+ return new_ai;
+
+ new_ai->ai_next = ai->ai_next;
+ ai->ai_next = new_ai;
+
+ new_ai->ai_flags = 0;
+ new_ai->ai_family = ai->ai_family;
+ new_ai->ai_socktype = ai->ai_socktype;
+ new_ai->ai_protocol = ai->ai_protocol;
+ new_ai->ai_canonname = 0;
+ new_ai->ai_addrlen = ai->ai_addrlen;
+ new_ai->ai_addr = gai_alloc<sockaddr>(ai->ai_addrlen);
+ memcpy(new_ai->ai_addr, ai->ai_addr, ai->ai_addrlen);
+
+ return new_ai;
+}
+
+inline int gai_port(addrinfo_type* aihead, int port, int socktype)
+{
+ int num_found = 0;
+
+ for (addrinfo_type* ai = aihead; ai; ai = ai->ai_next)
+ {
+ if (ai->ai_flags & gai_clone_flag)
+ {
+ if (ai->ai_socktype != 0)
+ {
+ ai = gai_clone(ai);
+ if (ai == 0)
+ return -1;
+ // ai now points to newly cloned entry.
+ }
+ }
+ else if (ai->ai_socktype != socktype)
+ {
+ // Ignore if mismatch on socket type.
+ continue;
+ }
+
+ ai->ai_socktype = socktype;
+
+ switch (ai->ai_family)
+ {
+ case AF_INET:
+ {
+ sockaddr_in4_type* sinptr =
+ reinterpret_cast<sockaddr_in4_type*>(ai->ai_addr);
+ sinptr->sin_port = port;
+ ++num_found;
+ break;
+ }
+ case AF_INET6:
+ {
+ sockaddr_in6_type* sin6ptr =
+ reinterpret_cast<sockaddr_in6_type*>(ai->ai_addr);
+ sin6ptr->sin6_port = port;
+ ++num_found;
+ break;
+ }
+ default:
+ break;
+ }
+ }
+
+ return num_found;
+}
+
+inline int gai_serv(addrinfo_type* aihead,
+ const addrinfo_type* hints, const char* serv)
+{
+ using namespace std;
+
+ int num_found = 0;
+
+ if (
+#if defined(AI_NUMERICSERV)
+ (hints->ai_flags & AI_NUMERICSERV) ||
+#endif
+ isdigit(static_cast<unsigned char>(serv[0])))
+ {
+ int port = htons(atoi(serv));
+ if (hints->ai_socktype)
+ {
+ // Caller specifies socket type.
+ int rc = gai_port(aihead, port, hints->ai_socktype);
+ if (rc < 0)
+ return EAI_MEMORY;
+ num_found += rc;
+ }
+ else
+ {
+ // Caller does not specify socket type.
+ int rc = gai_port(aihead, port, SOCK_STREAM);
+ if (rc < 0)
+ return EAI_MEMORY;
+ num_found += rc;
+ rc = gai_port(aihead, port, SOCK_DGRAM);
+ if (rc < 0)
+ return EAI_MEMORY;
+ num_found += rc;
+ }
+ }
+ else
+ {
+ // Try service name with TCP first, then UDP.
+ if (hints->ai_socktype == 0 || hints->ai_socktype == SOCK_STREAM)
+ {
+ servent* sptr = getservbyname(serv, "tcp");
+ if (sptr != 0)
+ {
+ int rc = gai_port(aihead, sptr->s_port, SOCK_STREAM);
+ if (rc < 0)
+ return EAI_MEMORY;
+ num_found += rc;
+ }
+ }
+ if (hints->ai_socktype == 0 || hints->ai_socktype == SOCK_DGRAM)
+ {
+ servent* sptr = getservbyname(serv, "udp");
+ if (sptr != 0)
+ {
+ int rc = gai_port(aihead, sptr->s_port, SOCK_DGRAM);
+ if (rc < 0)
+ return EAI_MEMORY;
+ num_found += rc;
+ }
+ }
+ }
+
+ if (num_found == 0)
+ {
+ if (hints->ai_socktype == 0)
+ {
+ // All calls to getservbyname() failed.
+ return EAI_NONAME;
+ }
+ else
+ {
+ // Service not supported for socket type.
+ return EAI_SERVICE;
+ }
+ }
+
+ return 0;
+}
+
+inline int gai_echeck(const char* host, const char* service,
+ int flags, int family, int socktype, int protocol)
+{
+ (void)(flags);
+ (void)(protocol);
+
+ // Host or service must be specified.
+ if (host == 0 || host[0] == '\0')
+ if (service == 0 || service[0] == '\0')
+ return EAI_NONAME;
+
+ // Check combination of family and socket type.
+ switch (family)
+ {
+ case AF_UNSPEC:
+ break;
+ case AF_INET:
+ case AF_INET6:
+ if (service != 0 && service[0] != '\0')
+ if (socktype != 0 && socktype != SOCK_STREAM && socktype != SOCK_DGRAM)
+ return EAI_SOCKTYPE;
+ break;
+ default:
+ return EAI_FAMILY;
+ }
+
+ return 0;
+}
+
+inline void freeaddrinfo_emulation(addrinfo_type* aihead)
+{
+ addrinfo_type* ai = aihead;
+ while (ai)
+ {
+ gai_free(ai->ai_addr);
+ gai_free(ai->ai_canonname);
+ addrinfo_type* ainext = ai->ai_next;
+ gai_free(ai);
+ ai = ainext;
+ }
+}
+
+inline int getaddrinfo_emulation(const char* host, const char* service,
+ const addrinfo_type* hintsp, addrinfo_type** result)
+{
+ // Set up linked list of addrinfo structures.
+ addrinfo_type* aihead = 0;
+ addrinfo_type** ainext = &aihead;
+ char* canon = 0;
+
+ // Supply default hints if not specified by caller.
+ addrinfo_type hints = addrinfo_type();
+ hints.ai_family = AF_UNSPEC;
+ if (hintsp)
+ hints = *hintsp;
+
+ // If the resolution is not specifically for AF_INET6, remove the AI_V4MAPPED
+ // and AI_ALL flags.
+#if defined(AI_V4MAPPED)
+ if (hints.ai_family != AF_INET6)
+ hints.ai_flags &= ~AI_V4MAPPED;
+#endif
+#if defined(AI_ALL)
+ if (hints.ai_family != AF_INET6)
+ hints.ai_flags &= ~AI_ALL;
+#endif
+
+ // Basic error checking.
+ int rc = gai_echeck(host, service, hints.ai_flags, hints.ai_family,
+ hints.ai_socktype, hints.ai_protocol);
+ if (rc != 0)
+ {
+ freeaddrinfo_emulation(aihead);
+ return rc;
+ }
+
+ gai_search search[2];
+ int search_count = gai_nsearch(host, &hints, search);
+ for (gai_search* sptr = search; sptr < search + search_count; ++sptr)
+ {
+ // Check for IPv4 dotted decimal string.
+ in4_addr_type inaddr;
+ boost::system::error_code ec;
+ if (socket_ops::inet_pton(AF_INET, sptr->host, &inaddr, 0, ec) == 1)
+ {
+ if (hints.ai_family != AF_UNSPEC && hints.ai_family != AF_INET)
+ {
+ freeaddrinfo_emulation(aihead);
+ gai_free(canon);
+ return EAI_FAMILY;
+ }
+ if (sptr->family == AF_INET)
+ {
+ rc = gai_aistruct(&ainext, &hints, &inaddr, AF_INET);
+ if (rc != 0)
+ {
+ freeaddrinfo_emulation(aihead);
+ gai_free(canon);
+ return rc;
+ }
+ }
+ continue;
+ }
+
+ // Check for IPv6 hex string.
+ in6_addr_type in6addr;
+ if (socket_ops::inet_pton(AF_INET6, sptr->host, &in6addr, 0, ec) == 1)
+ {
+ if (hints.ai_family != AF_UNSPEC && hints.ai_family != AF_INET6)
+ {
+ freeaddrinfo_emulation(aihead);
+ gai_free(canon);
+ return EAI_FAMILY;
+ }
+ if (sptr->family == AF_INET6)
+ {
+ rc = gai_aistruct(&ainext, &hints, &in6addr, AF_INET6);
+ if (rc != 0)
+ {
+ freeaddrinfo_emulation(aihead);
+ gai_free(canon);
+ return rc;
+ }
+ }
+ continue;
+ }
+
+ // Look up hostname.
+ hostent hent;
+ char hbuf[8192] = "";
+ hostent* hptr = socket_ops::gethostbyname(sptr->host,
+ sptr->family, &hent, hbuf, sizeof(hbuf), hints.ai_flags, ec);
+ if (hptr == 0)
+ {
+ if (search_count == 2)
+ {
+ // Failure is OK if there are multiple searches.
+ continue;
+ }
+ freeaddrinfo_emulation(aihead);
+ gai_free(canon);
+ if (ec == boost::asio::error::host_not_found)
+ return EAI_NONAME;
+ if (ec == boost::asio::error::host_not_found_try_again)
+ return EAI_AGAIN;
+ if (ec == boost::asio::error::no_recovery)
+ return EAI_FAIL;
+ if (ec == boost::asio::error::no_data)
+ return EAI_NONAME;
+ return EAI_NONAME;
+ }
+
+ // Check for address family mismatch if one was specified.
+ if (hints.ai_family != AF_UNSPEC && hints.ai_family != hptr->h_addrtype)
+ {
+ freeaddrinfo_emulation(aihead);
+ gai_free(canon);
+ socket_ops::freehostent(hptr);
+ return EAI_FAMILY;
+ }
+
+ // Save canonical name first time.
+ if (host != 0 && host[0] != '\0' && hptr->h_name && hptr->h_name[0]
+ && (hints.ai_flags & AI_CANONNAME) && canon == 0)
+ {
+ std::size_t canon_len = strlen(hptr->h_name) + 1;
+ canon = gai_alloc<char>(canon_len);
+ if (canon == 0)
+ {
+ freeaddrinfo_emulation(aihead);
+ socket_ops::freehostent(hptr);
+ return EAI_MEMORY;
+ }
+ gai_strcpy(canon, hptr->h_name, canon_len);
+ }
+
+ // Create an addrinfo structure for each returned address.
+ for (char** ap = hptr->h_addr_list; *ap; ++ap)
+ {
+ rc = gai_aistruct(&ainext, &hints, *ap, hptr->h_addrtype);
+ if (rc != 0)
+ {
+ freeaddrinfo_emulation(aihead);
+ gai_free(canon);
+ socket_ops::freehostent(hptr);
+ return EAI_FAMILY;
+ }
+ }
+
+ socket_ops::freehostent(hptr);
+ }
+
+ // Check if we found anything.
+ if (aihead == 0)
+ {
+ gai_free(canon);
+ return EAI_NONAME;
+ }
+
+ // Return canonical name in first entry.
+ if (host != 0 && host[0] != '\0' && (hints.ai_flags & AI_CANONNAME))
+ {
+ if (canon)
+ {
+ aihead->ai_canonname = canon;
+ canon = 0;
+ }
+ else
+ {
+ std::size_t canonname_len = strlen(search[0].host) + 1;
+ aihead->ai_canonname = gai_alloc<char>(canonname_len);
+ if (aihead->ai_canonname == 0)
+ {
+ freeaddrinfo_emulation(aihead);
+ return EAI_MEMORY;
+ }
+ gai_strcpy(aihead->ai_canonname, search[0].host, canonname_len);
+ }
+ }
+ gai_free(canon);
+
+ // Process the service name.
+ if (service != 0 && service[0] != '\0')
+ {
+ rc = gai_serv(aihead, &hints, service);
+ if (rc != 0)
+ {
+ freeaddrinfo_emulation(aihead);
+ return rc;
+ }
+ }
+
+ // Return result to caller.
+ *result = aihead;
+ return 0;
+}
+
+inline boost::system::error_code getnameinfo_emulation(
+ const socket_addr_type* sa, std::size_t salen, char* host,
+ std::size_t hostlen, char* serv, std::size_t servlen, int flags,
+ boost::system::error_code& ec)
+{
+ using namespace std;
+
+ const char* addr;
+ size_t addr_len;
+ unsigned short port;
+ switch (sa->sa_family)
+ {
+ case AF_INET:
+ if (salen != sizeof(sockaddr_in4_type))
+ {
+ return ec = boost::asio::error::invalid_argument;
+ }
+ addr = reinterpret_cast<const char*>(
+ &reinterpret_cast<const sockaddr_in4_type*>(sa)->sin_addr);
+ addr_len = sizeof(in4_addr_type);
+ port = reinterpret_cast<const sockaddr_in4_type*>(sa)->sin_port;
+ break;
+ case AF_INET6:
+ if (salen != sizeof(sockaddr_in6_type))
+ {
+ return ec = boost::asio::error::invalid_argument;
+ }
+ addr = reinterpret_cast<const char*>(
+ &reinterpret_cast<const sockaddr_in6_type*>(sa)->sin6_addr);
+ addr_len = sizeof(in6_addr_type);
+ port = reinterpret_cast<const sockaddr_in6_type*>(sa)->sin6_port;
+ break;
+ default:
+ return ec = boost::asio::error::address_family_not_supported;
+ }
+
+ if (host && hostlen > 0)
+ {
+ if (flags & NI_NUMERICHOST)
+ {
+ if (socket_ops::inet_ntop(sa->sa_family, addr, host, hostlen, 0, ec) == 0)
+ {
+ return ec;
+ }
+ }
+ else
+ {
+ hostent hent;
+ char hbuf[8192] = "";
+ hostent* hptr = socket_ops::gethostbyaddr(addr,
+ static_cast<int>(addr_len), sa->sa_family,
+ &hent, hbuf, sizeof(hbuf), ec);
+ if (hptr && hptr->h_name && hptr->h_name[0] != '\0')
+ {
+ if (flags & NI_NOFQDN)
+ {
+ char* dot = strchr(hptr->h_name, '.');
+ if (dot)
+ {
+ *dot = 0;
+ }
+ }
+ gai_strcpy(host, hptr->h_name, hostlen);
+ socket_ops::freehostent(hptr);
+ }
+ else
+ {
+ socket_ops::freehostent(hptr);
+ if (flags & NI_NAMEREQD)
+ {
+ return ec = boost::asio::error::host_not_found;
+ }
+ if (socket_ops::inet_ntop(sa->sa_family,
+ addr, host, hostlen, 0, ec) == 0)
+ {
+ return ec;
+ }
+ }
+ }
+ }
+
+ if (serv && servlen > 0)
+ {
+ if (flags & NI_NUMERICSERV)
+ {
+ if (servlen < 6)
+ {
+ return ec = boost::asio::error::no_buffer_space;
+ }
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(UNDER_CE)
+ sprintf_s(serv, servlen, "%u", ntohs(port));
+#else
+ sprintf(serv, "%u", ntohs(port));
+#endif
+ }
+ else
+ {
+#if defined(BOOST_HAS_THREADS) && defined(BOOST_HAS_PTHREADS) \
+ && !defined(BOOST_ASIO_DISABLE_THREADS)
+ static ::pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+ ::pthread_mutex_lock(&mutex);
+#endif // defined(BOOST_HAS_THREADS) && defined(BOOST_HAS_PTHREADS)
+ // && !defined(BOOST_ASIO_DISABLE_THREADS)
+ servent* sptr = ::getservbyport(port, (flags & NI_DGRAM) ? "udp" : 0);
+ if (sptr && sptr->s_name && sptr->s_name[0] != '\0')
+ {
+ gai_strcpy(serv, sptr->s_name, servlen);
+ }
+ else
+ {
+ if (servlen < 6)
+ {
+ return ec = boost::asio::error::no_buffer_space;
+ }
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(UNDER_CE)
+ sprintf_s(serv, servlen, "%u", ntohs(port));
+#else
+ sprintf(serv, "%u", ntohs(port));
+#endif
+ }
+#if defined(BOOST_HAS_THREADS) && defined(BOOST_HAS_PTHREADS) \
+ && !defined(BOOST_ASIO_DISABLE_THREADS)
+ ::pthread_mutex_unlock(&mutex);
+#endif // defined(BOOST_HAS_THREADS) && defined(BOOST_HAS_PTHREADS)
+ // && !defined(BOOST_ASIO_DISABLE_THREADS)
+ }
+ }
+
+ ec = boost::system::error_code();
+ return ec;
+}
+
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ // || defined(__MACH__) && defined(__APPLE__)
+
+inline boost::system::error_code translate_addrinfo_error(int error)
+{
+ switch (error)
+ {
+ case 0:
+ return boost::system::error_code();
+ case EAI_AGAIN:
+ return boost::asio::error::host_not_found_try_again;
+ case EAI_BADFLAGS:
+ return boost::asio::error::invalid_argument;
+ case EAI_FAIL:
+ return boost::asio::error::no_recovery;
+ case EAI_FAMILY:
+ return boost::asio::error::address_family_not_supported;
+ case EAI_MEMORY:
+ return boost::asio::error::no_memory;
+ case EAI_NONAME:
+#if defined(EAI_ADDRFAMILY)
+ case EAI_ADDRFAMILY:
+#endif
+#if defined(EAI_NODATA) && (EAI_NODATA != EAI_NONAME)
+ case EAI_NODATA:
+#endif
+ return boost::asio::error::host_not_found;
+ case EAI_SERVICE:
+ return boost::asio::error::service_not_found;
+ case EAI_SOCKTYPE:
+ return boost::asio::error::socket_type_not_supported;
+ default: // Possibly the non-portable EAI_SYSTEM.
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+ return boost::system::error_code(
+ WSAGetLastError(), boost::asio::error::get_system_category());
+#else
+ return boost::system::error_code(
+ errno, boost::asio::error::get_system_category());
+#endif
+ }
+}
+
+boost::system::error_code getaddrinfo(const char* host,
+ const char* service, const addrinfo_type& hints,
+ addrinfo_type** result, boost::system::error_code& ec)
+{
+ host = (host && *host) ? host : 0;
+ service = (service && *service) ? service : 0;
+ clear_last_error();
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+# if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0501) || defined(UNDER_CE)
+ // Building for Windows XP, Windows Server 2003, or later.
+ int error = ::getaddrinfo(host, service, &hints, result);
+ return ec = translate_addrinfo_error(error);
+# else
+ // Building for Windows 2000 or earlier.
+ typedef int (WSAAPI *gai_t)(const char*,
+ const char*, const addrinfo_type*, addrinfo_type**);
+ if (HMODULE winsock_module = ::GetModuleHandleA("ws2_32"))
+ {
+ if (gai_t gai = (gai_t)::GetProcAddress(winsock_module, "getaddrinfo"))
+ {
+ int error = gai(host, service, &hints, result);
+ return ec = translate_addrinfo_error(error);
+ }
+ }
+ int error = getaddrinfo_emulation(host, service, &hints, result);
+ return ec = translate_addrinfo_error(error);
+# endif
+#elif defined(__MACH__) && defined(__APPLE__)
+ int error = getaddrinfo_emulation(host, service, &hints, result);
+ return ec = translate_addrinfo_error(error);
+#else
+ int error = ::getaddrinfo(host, service, &hints, result);
+ return ec = translate_addrinfo_error(error);
+#endif
+}
+
+boost::system::error_code background_getaddrinfo(
+ const weak_cancel_token_type& cancel_token, const char* host,
+ const char* service, const addrinfo_type& hints,
+ addrinfo_type** result, boost::system::error_code& ec)
+{
+ if (cancel_token.expired())
+ ec = boost::asio::error::operation_aborted;
+ else
+ socket_ops::getaddrinfo(host, service, hints, result, ec);
+ return ec;
+}
+
+void freeaddrinfo(addrinfo_type* ai)
+{
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+# if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0501) || defined(UNDER_CE)
+ // Building for Windows XP, Windows Server 2003, or later.
+ ::freeaddrinfo(ai);
+# else
+ // Building for Windows 2000 or earlier.
+ typedef int (WSAAPI *fai_t)(addrinfo_type*);
+ if (HMODULE winsock_module = ::GetModuleHandleA("ws2_32"))
+ {
+ if (fai_t fai = (fai_t)::GetProcAddress(winsock_module, "freeaddrinfo"))
+ {
+ fai(ai);
+ return;
+ }
+ }
+ freeaddrinfo_emulation(ai);
+# endif
+#elif defined(__MACH__) && defined(__APPLE__)
+ freeaddrinfo_emulation(ai);
+#else
+ ::freeaddrinfo(ai);
+#endif
+}
+
+boost::system::error_code getnameinfo(const socket_addr_type* addr,
+ std::size_t addrlen, char* host, std::size_t hostlen,
+ char* serv, std::size_t servlen, int flags, boost::system::error_code& ec)
+{
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+# if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0501) || defined(UNDER_CE)
+ // Building for Windows XP, Windows Server 2003, or later.
+ clear_last_error();
+ int error = ::getnameinfo(addr, static_cast<socklen_t>(addrlen),
+ host, static_cast<DWORD>(hostlen),
+ serv, static_cast<DWORD>(servlen), flags);
+ return ec = translate_addrinfo_error(error);
+# else
+ // Building for Windows 2000 or earlier.
+ typedef int (WSAAPI *gni_t)(const socket_addr_type*,
+ int, char*, DWORD, char*, DWORD, int);
+ if (HMODULE winsock_module = ::GetModuleHandleA("ws2_32"))
+ {
+ if (gni_t gni = (gni_t)::GetProcAddress(winsock_module, "getnameinfo"))
+ {
+ clear_last_error();
+ int error = gni(addr, static_cast<int>(addrlen),
+ host, static_cast<DWORD>(hostlen),
+ serv, static_cast<DWORD>(servlen), flags);
+ return ec = translate_addrinfo_error(error);
+ }
+ }
+ clear_last_error();
+ return getnameinfo_emulation(addr, addrlen,
+ host, hostlen, serv, servlen, flags, ec);
+# endif
+#elif defined(__MACH__) && defined(__APPLE__)
+ using namespace std; // For memcpy.
+ sockaddr_storage_type tmp_addr;
+ memcpy(&tmp_addr, addr, addrlen);
+ tmp_addr.ss_len = addrlen;
+ addr = reinterpret_cast<socket_addr_type*>(&tmp_addr);
+ clear_last_error();
+ return getnameinfo_emulation(addr, addrlen,
+ host, hostlen, serv, servlen, flags, ec);
+#else
+ clear_last_error();
+ int error = ::getnameinfo(addr, addrlen, host, hostlen, serv, servlen, flags);
+ return ec = translate_addrinfo_error(error);
+#endif
+}
+
+boost::system::error_code sync_getnameinfo(
+ const socket_addr_type* addr, std::size_t addrlen,
+ char* host, std::size_t hostlen, char* serv,
+ std::size_t servlen, int sock_type, boost::system::error_code& ec)
+{
+ // First try resolving with the service name. If that fails try resolving
+ // but allow the service to be returned as a number.
+ int flags = (sock_type == SOCK_DGRAM) ? NI_DGRAM : 0;
+ socket_ops::getnameinfo(addr, addrlen, host,
+ hostlen, serv, servlen, flags, ec);
+ if (ec)
+ {
+ socket_ops::getnameinfo(addr, addrlen, host, hostlen,
+ serv, servlen, flags | NI_NUMERICSERV, ec);
+ }
+
+ return ec;
+}
+
+boost::system::error_code background_getnameinfo(
+ const weak_cancel_token_type& cancel_token,
+ const socket_addr_type* addr, std::size_t addrlen,
+ char* host, std::size_t hostlen, char* serv,
+ std::size_t servlen, int sock_type, boost::system::error_code& ec)
+{
+ if (cancel_token.expired())
+ {
+ ec = boost::asio::error::operation_aborted;
+ }
+ else
+ {
+ // First try resolving with the service name. If that fails try resolving
+ // but allow the service to be returned as a number.
+ int flags = (sock_type == SOCK_DGRAM) ? NI_DGRAM : 0;
+ socket_ops::getnameinfo(addr, addrlen, host,
+ hostlen, serv, servlen, flags, ec);
+ if (ec)
+ {
+ socket_ops::getnameinfo(addr, addrlen, host, hostlen,
+ serv, servlen, flags | NI_NUMERICSERV, ec);
+ }
+ }
+
+ return ec;
+}
+
+u_long_type network_to_host_long(u_long_type value)
+{
+ return ntohl(value);
+}
+
+u_long_type host_to_network_long(u_long_type value)
+{
+ return htonl(value);
+}
+
+u_short_type network_to_host_short(u_short_type value)
+{
+ return ntohs(value);
+}
+
+u_short_type host_to_network_short(u_short_type value)
+{
+ return htons(value);
+}
+
+} // namespace socket_ops
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_SOCKET_OPS_IPP