| // |
| // socket_ops.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_SOCKET_OPS_HPP |
| #define BOOST_ASIO_DETAIL_SOCKET_OPS_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/config.hpp> |
| #include <boost/assert.hpp> |
| #include <cstdio> |
| #include <cstdlib> |
| #include <cstring> |
| #include <cerrno> |
| #include <boost/detail/workaround.hpp> |
| #include <new> |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #include <boost/asio/error.hpp> |
| #include <boost/asio/detail/socket_types.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_error(boost::system::error_code& ec) |
| { |
| #if defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| WSASetLastError(0); |
| #else |
| errno = 0; |
| #endif |
| ec = boost::system::error_code(); |
| } |
| |
| 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; |
| } |
| |
| inline socket_type accept(socket_type s, socket_addr_type* addr, |
| std::size_t* addrlen, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| |
| 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 |
| |
| clear_error(ec); |
| return new_s; |
| } |
| |
| 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); |
| } |
| |
| inline int bind(socket_type s, const socket_addr_type* addr, |
| std::size_t addrlen, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(call_bind( |
| &msghdr::msg_namelen, s, addr, addrlen), ec); |
| if (result == 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int close(socket_type s, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| #if defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| int result = error_wrapper(::closesocket(s), ec); |
| #else // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| int result = error_wrapper(::close(s), ec); |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| if (result == 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int shutdown(socket_type s, int what, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(::shutdown(s, what), ec); |
| if (result == 0) |
| clear_error(ec); |
| 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); |
| } |
| |
| inline int connect(socket_type s, const socket_addr_type* addr, |
| std::size_t addrlen, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(call_connect( |
| &msghdr::msg_namelen, s, addr, addrlen), ec); |
| if (result == 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline 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 -1; |
| #else |
| clear_error(ec); |
| int result = error_wrapper(::socketpair(af, type, protocol, sv), ec); |
| if (result == 0) |
| clear_error(ec); |
| return result; |
| #endif |
| } |
| |
| inline int listen(socket_type s, int backlog, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(::listen(s, backlog), ec); |
| if (result == 0) |
| clear_error(ec); |
| 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__) |
| |
| inline 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__) |
| } |
| |
| inline 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)); |
| } |
| |
| inline int recv(socket_type s, buf* bufs, size_t count, int flags, |
| boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| #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 (result != 0) |
| return -1; |
| clear_error(ec); |
| 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) |
| clear_error(ec); |
| return result; |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| } |
| |
| inline 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_error(ec); |
| #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 (result != 0) |
| return -1; |
| clear_error(ec); |
| 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) |
| clear_error(ec); |
| return result; |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| } |
| |
| inline int send(socket_type s, const buf* bufs, size_t count, int flags, |
| boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| #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 (result != 0) |
| return -1; |
| clear_error(ec); |
| 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) |
| clear_error(ec); |
| return result; |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| } |
| |
| inline 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_error(ec); |
| #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 (result != 0) |
| return -1; |
| clear_error(ec); |
| 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) |
| clear_error(ec); |
| return result; |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| } |
| |
| inline socket_type socket(int af, int type, int protocol, |
| boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| #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)); |
| } |
| |
| clear_error(ec); |
| |
| 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) |
| clear_error(ec); |
| 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); |
| } |
| |
| inline int setsockopt(socket_type s, int level, int optname, |
| const void* optval, std::size_t optlen, boost::system::error_code& ec) |
| { |
| if (level == custom_socket_option_level && optname == always_fail_option) |
| { |
| ec = boost::asio::error::invalid_argument; |
| return -1; |
| } |
| |
| #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_error(ec); |
| return error_wrapper(sso(s, level, optname, |
| reinterpret_cast<const char*>(optval), |
| static_cast<int>(optlen)), ec); |
| } |
| } |
| ec = boost::asio::error::fault; |
| return -1; |
| #else // defined(__BORLANDC__) |
| clear_error(ec); |
| int result = error_wrapper(call_setsockopt(&msghdr::msg_namelen, |
| s, level, optname, optval, optlen), ec); |
| if (result == 0) |
| clear_error(ec); |
| 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; |
| } |
| |
| inline int getsockopt(socket_type s, int level, int optname, void* optval, |
| size_t* optlen, boost::system::error_code& ec) |
| { |
| if (level == custom_socket_option_level && optname == always_fail_option) |
| { |
| ec = boost::asio::error::invalid_argument; |
| return -1; |
| } |
| |
| #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_error(ec); |
| 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; |
| clear_error(ec); |
| } |
| return result; |
| } |
| } |
| ec = boost::asio::error::fault; |
| return -1; |
| #elif defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| clear_error(ec); |
| 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; |
| clear_error(ec); |
| } |
| if (result == 0) |
| clear_error(ec); |
| return result; |
| #else // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| clear_error(ec); |
| 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) |
| clear_error(ec); |
| 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; |
| } |
| |
| inline int getpeername(socket_type s, socket_addr_type* addr, |
| std::size_t* addrlen, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(call_getpeername( |
| &msghdr::msg_namelen, s, addr, addrlen), ec); |
| if (result == 0) |
| clear_error(ec); |
| 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; |
| } |
| |
| inline int getsockname(socket_type s, socket_addr_type* addr, |
| std::size_t* addrlen, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(call_getsockname( |
| &msghdr::msg_namelen, s, addr, addrlen), ec); |
| if (result == 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int ioctl(socket_type s, long cmd, ioctl_arg_type* arg, |
| boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| #if defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| int result = error_wrapper(::ioctlsocket(s, cmd, arg), ec); |
| #else // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| int result = error_wrapper(::ioctl(s, cmd, arg), ec); |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int select(int nfds, fd_set* readfds, fd_set* writefds, |
| fd_set* exceptfds, timeval* timeout, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| #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(__HP_aCC) |
| 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) |
| clear_error(ec); |
| return result; |
| #endif |
| } |
| |
| inline int poll_read(socket_type s, boost::system::error_code& ec) |
| { |
| #if defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| FD_SET fds; |
| FD_ZERO(&fds); |
| FD_SET(s, &fds); |
| clear_error(ec); |
| int result = error_wrapper(::select(s, &fds, 0, 0, 0), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| #else // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| pollfd fds; |
| fds.fd = s; |
| fds.events = POLLIN; |
| fds.revents = 0; |
| clear_error(ec); |
| int result = error_wrapper(::poll(&fds, 1, -1), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| } |
| |
| inline int poll_write(socket_type s, boost::system::error_code& ec) |
| { |
| #if defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| FD_SET fds; |
| FD_ZERO(&fds); |
| FD_SET(s, &fds); |
| clear_error(ec); |
| int result = error_wrapper(::select(s, 0, &fds, 0, 0), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| #else // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| pollfd fds; |
| fds.fd = s; |
| fds.events = POLLOUT; |
| fds.revents = 0; |
| clear_error(ec); |
| int result = error_wrapper(::poll(&fds, 1, -1), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| } |
| |
| inline int poll_connect(socket_type s, boost::system::error_code& ec) |
| { |
| #if defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| 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_error(ec); |
| int result = error_wrapper(::select(s, 0, &write_fds, &except_fds, 0), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| #else // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| pollfd fds; |
| fds.fd = s; |
| fds.events = POLLOUT; |
| fds.revents = 0; |
| clear_error(ec); |
| int result = error_wrapper(::poll(&fds, 1, -1), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| } |
| |
| inline const char* inet_ntop(int af, const void* src, char* dest, size_t length, |
| unsigned long scope_id, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| #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) |
| clear_error(ec); |
| |
| // 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 = IN6_IS_ADDR_LINKLOCAL(ipv6_address); |
| 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__) |
| } |
| |
| inline int inet_pton(int af, const char* src, void* dest, |
| unsigned long* scope_id, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| #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)); |
| clear_error(ec); |
| } |
| else if (strcmp(src, "255.255.255.255") == 0) |
| { |
| static_cast<in4_addr_type*>(dest)->s_addr = INADDR_NONE; |
| clear_error(ec); |
| } |
| } |
| 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; |
| clear_error(ec); |
| } |
| } |
| |
| // 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) |
| clear_error(ec); |
| |
| 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 = IN6_IS_ADDR_LINKLOCAL(ipv6_address); |
| 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__) |
| } |
| |
| inline int gethostname(char* name, int namelen, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(::gethostname(name, namelen), ec); |
| #if defined(BOOST_WINDOWS) |
| if (result == 0) |
| clear_error(ec); |
| #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_error(ec); |
| #if defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| (void)(buffer); |
| (void)(buflength); |
| hostent* retval = error_wrapper(::gethostbyaddr(addr, length, af), ec); |
| if (!retval) |
| return 0; |
| clear_error(ec); |
| *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_error(ec); |
| #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; |
| clear_error(ec); |
| *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(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 (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) |
| static ::pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; |
| ::pthread_mutex_lock(&mutex); |
| #endif // defined(BOOST_HAS_THREADS) && defined(BOOST_HAS_PTHREADS) |
| 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) |
| ::pthread_mutex_unlock(&mutex); |
| #endif // defined(BOOST_HAS_THREADS) && defined(BOOST_HAS_PTHREADS) |
| } |
| } |
| |
| clear_error(ec); |
| 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 |
| } |
| } |
| |
| inline boost::system::error_code getaddrinfo(const char* host, |
| const char* service, const addrinfo_type* hints, addrinfo_type** result, |
| boost::system::error_code& ec) |
| { |
| clear_error(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. |
| 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 |
| } |
| |
| inline 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 |
| } |
| |
| inline 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_error(ec); |
| 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_error(ec); |
| 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_error(ec); |
| 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_error(ec); |
| return getnameinfo_emulation(addr, addrlen, |
| host, hostlen, serv, servlen, flags, ec); |
| #else |
| clear_error(ec); |
| int error = ::getnameinfo(addr, addrlen, host, hostlen, serv, servlen, flags); |
| return ec = translate_addrinfo_error(error); |
| #endif |
| } |
| |
| inline u_long_type network_to_host_long(u_long_type value) |
| { |
| return ntohl(value); |
| } |
| |
| inline u_long_type host_to_network_long(u_long_type value) |
| { |
| return htonl(value); |
| } |
| |
| inline u_short_type network_to_host_short(u_short_type value) |
| { |
| return ntohs(value); |
| } |
| |
| inline 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_HPP |