1865 lines
51 KiB
C++
1865 lines
51 KiB
C++
//
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// socket_ops.hpp
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// ~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2007 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_DETAIL_SOCKET_OPS_HPP
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#define ASIO_DETAIL_SOCKET_OPS_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/push_options.hpp"
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#include "asio/detail/push_options.hpp"
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#include <boost/config.hpp>
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#include <boost/assert.hpp>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <cerrno>
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#include <boost/detail/workaround.hpp>
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#include <new>
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#include "asio/detail/pop_options.hpp"
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#include "asio/error.hpp"
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#include "asio/detail/socket_types.hpp"
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namespace asio {
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namespace detail {
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namespace socket_ops {
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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struct msghdr { int msg_namelen; };
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#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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#if defined(__hpux)
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// HP-UX doesn't declare these functions extern "C", so they are declared again
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// here to avoid linker errors about undefined symbols.
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extern "C" char* if_indextoname(unsigned int, char*);
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extern "C" unsigned int if_nametoindex(const char*);
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#endif // defined(__hpux)
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inline void clear_error(asio::error_code& ec)
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{
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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WSASetLastError(0);
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#else
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errno = 0;
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#endif
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ec = asio::error_code();
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}
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template <typename ReturnType>
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inline ReturnType error_wrapper(ReturnType return_value,
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asio::error_code& ec)
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{
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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ec = asio::error_code(WSAGetLastError(),
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asio::error::get_system_category());
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#else
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ec = asio::error_code(errno,
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asio::error::get_system_category());
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#endif
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return return_value;
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}
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template <typename SockLenType>
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inline socket_type call_accept(SockLenType msghdr::*,
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socket_type s, socket_addr_type* addr, std::size_t* addrlen)
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{
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SockLenType tmp_addrlen = addrlen ? (SockLenType)*addrlen : 0;
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socket_type result = ::accept(s, addr, addrlen ? &tmp_addrlen : 0);
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if (addrlen)
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*addrlen = (std::size_t)tmp_addrlen;
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return result;
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}
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inline socket_type accept(socket_type s, socket_addr_type* addr,
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std::size_t* addrlen, asio::error_code& ec)
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{
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clear_error(ec);
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socket_type new_s = error_wrapper(call_accept(
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&msghdr::msg_namelen, s, addr, addrlen), ec);
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if (new_s == invalid_socket)
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return new_s;
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#if defined(__MACH__) && defined(__APPLE__) || defined(__FreeBSD__)
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int optval = 1;
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int result = error_wrapper(::setsockopt(new_s,
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SOL_SOCKET, SO_NOSIGPIPE, &optval, sizeof(optval)), ec);
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if (result != 0)
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{
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::close(new_s);
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return invalid_socket;
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}
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#endif
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#if defined(BOOST_WINDOWS) && defined(UNDER_CE)
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clear_error(ec);
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#endif
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return new_s;
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}
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template <typename SockLenType>
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inline int call_bind(SockLenType msghdr::*,
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socket_type s, const socket_addr_type* addr, std::size_t addrlen)
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{
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return ::bind(s, addr, (SockLenType)addrlen);
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}
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inline int bind(socket_type s, const socket_addr_type* addr,
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std::size_t addrlen, asio::error_code& ec)
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{
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clear_error(ec);
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int result = error_wrapper(call_bind(
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&msghdr::msg_namelen, s, addr, addrlen), ec);
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#if defined(BOOST_WINDOWS) && defined(UNDER_CE)
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if (result == 0)
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clear_error(ec);
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#endif
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return result;
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}
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inline int close(socket_type s, asio::error_code& ec)
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{
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clear_error(ec);
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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int result = error_wrapper(::closesocket(s), ec);
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# if defined(UNDER_CE)
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if (result == 0)
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clear_error(ec);
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# endif
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return result;
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#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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return error_wrapper(::close(s), ec);
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#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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}
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inline int shutdown(socket_type s, int what, asio::error_code& ec)
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{
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clear_error(ec);
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int result = error_wrapper(::shutdown(s, what), ec);
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#if defined(BOOST_WINDOWS) && defined(UNDER_CE)
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if (result == 0)
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clear_error(ec);
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#endif
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return result;
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}
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template <typename SockLenType>
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inline int call_connect(SockLenType msghdr::*,
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socket_type s, const socket_addr_type* addr, std::size_t addrlen)
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{
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return ::connect(s, addr, (SockLenType)addrlen);
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}
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inline int connect(socket_type s, const socket_addr_type* addr,
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std::size_t addrlen, asio::error_code& ec)
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{
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clear_error(ec);
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int result = error_wrapper(call_connect(
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&msghdr::msg_namelen, s, addr, addrlen), ec);
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#if defined(BOOST_WINDOWS) && defined(UNDER_CE)
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if (result == 0)
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clear_error(ec);
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#endif
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return result;
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}
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inline int listen(socket_type s, int backlog, asio::error_code& ec)
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{
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clear_error(ec);
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int result = error_wrapper(::listen(s, backlog), ec);
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#if defined(BOOST_WINDOWS) && defined(UNDER_CE)
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if (result == 0)
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clear_error(ec);
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#endif
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return result;
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}
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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typedef WSABUF buf;
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#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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typedef iovec buf;
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#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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inline void init_buf(buf& b, void* data, size_t size)
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{
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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b.buf = static_cast<char*>(data);
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b.len = static_cast<u_long>(size);
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#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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b.iov_base = data;
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b.iov_len = size;
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#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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}
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inline void init_buf(buf& b, const void* data, size_t size)
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{
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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b.buf = static_cast<char*>(const_cast<void*>(data));
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b.len = static_cast<u_long>(size);
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#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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b.iov_base = const_cast<void*>(data);
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b.iov_len = size;
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#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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}
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inline void init_msghdr_msg_name(void*& name, socket_addr_type* addr)
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{
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name = addr;
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}
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inline void init_msghdr_msg_name(void*& name, const socket_addr_type* addr)
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{
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name = const_cast<socket_addr_type*>(addr);
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}
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template <typename T>
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inline void init_msghdr_msg_name(T& name, socket_addr_type* addr)
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{
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name = reinterpret_cast<T>(addr);
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}
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template <typename T>
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inline void init_msghdr_msg_name(T& name, const socket_addr_type* addr)
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{
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name = reinterpret_cast<T>(const_cast<socket_addr_type*>(addr));
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}
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inline int recv(socket_type s, buf* bufs, size_t count, int flags,
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asio::error_code& ec)
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{
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clear_error(ec);
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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// Receive some data.
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DWORD recv_buf_count = static_cast<DWORD>(count);
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DWORD bytes_transferred = 0;
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DWORD recv_flags = flags;
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int result = error_wrapper(::WSARecv(s, bufs,
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recv_buf_count, &bytes_transferred, &recv_flags, 0, 0), ec);
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if (result != 0)
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return -1;
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# if defined(UNDER_CE)
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clear_error(ec);
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# endif
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return bytes_transferred;
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#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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msghdr msg = msghdr();
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msg.msg_iov = bufs;
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msg.msg_iovlen = count;
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return error_wrapper(::recvmsg(s, &msg, flags), ec);
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#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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}
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inline int recvfrom(socket_type s, buf* bufs, size_t count, int flags,
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socket_addr_type* addr, std::size_t* addrlen,
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asio::error_code& ec)
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{
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clear_error(ec);
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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// Receive some data.
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DWORD recv_buf_count = static_cast<DWORD>(count);
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DWORD bytes_transferred = 0;
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DWORD recv_flags = flags;
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int tmp_addrlen = (int)*addrlen;
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int result = error_wrapper(::WSARecvFrom(s, bufs, recv_buf_count,
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&bytes_transferred, &recv_flags, addr, &tmp_addrlen, 0, 0), ec);
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*addrlen = (std::size_t)tmp_addrlen;
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if (result != 0)
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return -1;
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# if defined(UNDER_CE)
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clear_error(ec);
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# endif
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return bytes_transferred;
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#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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msghdr msg = msghdr();
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init_msghdr_msg_name(msg.msg_name, addr);
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msg.msg_namelen = *addrlen;
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msg.msg_iov = bufs;
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msg.msg_iovlen = count;
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int result = error_wrapper(::recvmsg(s, &msg, flags), ec);
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*addrlen = msg.msg_namelen;
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return result;
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#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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}
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inline int send(socket_type s, const buf* bufs, size_t count, int flags,
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asio::error_code& ec)
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{
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clear_error(ec);
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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// Send the data.
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DWORD send_buf_count = static_cast<DWORD>(count);
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DWORD bytes_transferred = 0;
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DWORD send_flags = flags;
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int result = error_wrapper(::WSASend(s, const_cast<buf*>(bufs),
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send_buf_count, &bytes_transferred, send_flags, 0, 0), ec);
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if (result != 0)
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return -1;
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# if defined(UNDER_CE)
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clear_error(ec);
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# endif
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return bytes_transferred;
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#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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msghdr msg = msghdr();
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msg.msg_iov = const_cast<buf*>(bufs);
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msg.msg_iovlen = count;
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#if defined(__linux__)
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flags |= MSG_NOSIGNAL;
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#endif // defined(__linux__)
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return error_wrapper(::sendmsg(s, &msg, flags), ec);
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#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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}
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inline int sendto(socket_type s, const buf* bufs, size_t count, int flags,
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const socket_addr_type* addr, std::size_t addrlen,
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asio::error_code& ec)
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{
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clear_error(ec);
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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// Send the data.
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DWORD send_buf_count = static_cast<DWORD>(count);
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DWORD bytes_transferred = 0;
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int result = error_wrapper(::WSASendTo(s, const_cast<buf*>(bufs),
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send_buf_count, &bytes_transferred, flags, addr,
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static_cast<int>(addrlen), 0, 0), ec);
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if (result != 0)
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return -1;
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# if defined(UNDER_CE)
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clear_error(ec);
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# endif
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return bytes_transferred;
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#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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msghdr msg = msghdr();
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init_msghdr_msg_name(msg.msg_name, addr);
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msg.msg_namelen = addrlen;
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msg.msg_iov = const_cast<buf*>(bufs);
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msg.msg_iovlen = count;
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#if defined(__linux__)
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flags |= MSG_NOSIGNAL;
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#endif // defined(__linux__)
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return error_wrapper(::sendmsg(s, &msg, flags), ec);
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#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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}
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inline socket_type socket(int af, int type, int protocol,
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asio::error_code& ec)
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{
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clear_error(ec);
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#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
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socket_type s = error_wrapper(::WSASocket(af, type, protocol, 0, 0,
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WSA_FLAG_OVERLAPPED), ec);
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if (s == invalid_socket)
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return s;
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if (af == AF_INET6)
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{
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// Try to enable the POSIX default behaviour of having IPV6_V6ONLY set to
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// false. This will only succeed on Windows Vista and later versions of
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// Windows, where a dual-stack IPv4/v6 implementation is available.
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DWORD optval = 0;
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::setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
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reinterpret_cast<const char*>(&optval), sizeof(optval));
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}
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# if defined(UNDER_CE)
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clear_error(ec);
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# endif
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return s;
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#elif defined(__MACH__) && defined(__APPLE__) || defined(__FreeBSD__)
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socket_type s = error_wrapper(::socket(af, type, protocol), ec);
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if (s == invalid_socket)
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return s;
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int optval = 1;
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int result = error_wrapper(::setsockopt(s,
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SOL_SOCKET, SO_NOSIGPIPE, &optval, sizeof(optval)), ec);
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if (result != 0)
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{
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::close(s);
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return invalid_socket;
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}
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return s;
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#else
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return error_wrapper(::socket(af, type, protocol), ec);
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#endif
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}
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template <typename SockLenType>
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inline int call_setsockopt(SockLenType msghdr::*,
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socket_type s, int level, int optname,
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const void* optval, std::size_t optlen)
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{
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return ::setsockopt(s, level, optname,
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(const char*)optval, (SockLenType)optlen);
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}
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inline int setsockopt(socket_type s, int level, int optname,
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const void* optval, std::size_t optlen, asio::error_code& ec)
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{
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if (level == custom_socket_option_level && optname == always_fail_option)
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{
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ec = asio::error::invalid_argument;
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return -1;
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}
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#if defined(__BORLANDC__)
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// Mysteriously, using the getsockopt and setsockopt functions directly with
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// Borland C++ results in incorrect values being set and read. The bug can be
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// worked around by using function addresses resolved with GetProcAddress.
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if (HMODULE winsock_module = ::GetModuleHandleA("ws2_32"))
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{
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typedef int (WSAAPI *sso_t)(SOCKET, int, int, const char*, int);
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if (sso_t sso = (sso_t)::GetProcAddress(winsock_module, "setsockopt"))
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{
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clear_error(ec);
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return error_wrapper(sso(s, level, optname,
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reinterpret_cast<const char*>(optval),
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static_cast<int>(optlen)), ec);
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}
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}
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ec = asio::error::fault;
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return -1;
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#else // defined(__BORLANDC__)
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clear_error(ec);
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int result = error_wrapper(call_setsockopt(&msghdr::msg_namelen,
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s, level, optname, optval, optlen), ec);
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# if defined(BOOST_WINDOWS) && defined(UNDER_CE)
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if (result == 0)
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clear_error(ec);
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# endif
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return result;
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#endif // defined(__BORLANDC__)
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}
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template <typename SockLenType>
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inline int call_getsockopt(SockLenType msghdr::*,
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socket_type s, int level, int optname,
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void* optval, std::size_t* optlen)
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{
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SockLenType tmp_optlen = (SockLenType)*optlen;
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int result = ::getsockopt(s, level, optname, (char*)optval, &tmp_optlen);
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*optlen = (std::size_t)tmp_optlen;
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return result;
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}
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inline int getsockopt(socket_type s, int level, int optname, void* optval,
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size_t* optlen, asio::error_code& ec)
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{
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if (level == custom_socket_option_level && optname == always_fail_option)
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{
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ec = asio::error::invalid_argument;
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return -1;
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}
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#if defined(__BORLANDC__)
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// Mysteriously, using the getsockopt and setsockopt functions directly with
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// Borland C++ results in incorrect values being set and read. The bug can be
|
|
// worked around by using function addresses resolved with GetProcAddress.
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if (HMODULE winsock_module = ::GetModuleHandleA("ws2_32"))
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{
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typedef int (WSAAPI *gso_t)(SOCKET, int, int, char*, int*);
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if (gso_t gso = (gso_t)::GetProcAddress(winsock_module, "getsockopt"))
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{
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clear_error(ec);
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int tmp_optlen = static_cast<int>(*optlen);
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int result = error_wrapper(gso(s, level, optname,
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reinterpret_cast<char*>(optval), &tmp_optlen), ec);
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*optlen = static_cast<size_t>(tmp_optlen);
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|
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 = 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 defined(UNDER_CE)
|
|
if (result == 0)
|
|
clear_error(ec);
|
|
# endif
|
|
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__)
|
|
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, asio::error_code& ec)
|
|
{
|
|
clear_error(ec);
|
|
int result = error_wrapper(call_getpeername(
|
|
&msghdr::msg_namelen, s, addr, addrlen), ec);
|
|
#if defined(BOOST_WINDOWS) && defined(UNDER_CE)
|
|
if (result == 0)
|
|
clear_error(ec);
|
|
#endif
|
|
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, asio::error_code& ec)
|
|
{
|
|
clear_error(ec);
|
|
int result = error_wrapper(call_getsockname(
|
|
&msghdr::msg_namelen, s, addr, addrlen), ec);
|
|
#if defined(BOOST_WINDOWS) && defined(UNDER_CE)
|
|
if (result == 0)
|
|
clear_error(ec);
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
inline int ioctl(socket_type s, long cmd, ioctl_arg_type* arg,
|
|
asio::error_code& ec)
|
|
{
|
|
clear_error(ec);
|
|
#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
|
|
int result = error_wrapper(::ioctlsocket(s, cmd, arg), ec);
|
|
# if defined(UNDER_CE)
|
|
if (result == 0)
|
|
clear_error(ec);
|
|
# endif
|
|
return result;
|
|
#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
|
|
return error_wrapper(::ioctl(s, cmd, arg), ec);
|
|
#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
|
|
}
|
|
|
|
inline int select(int nfds, fd_set* readfds, fd_set* writefds,
|
|
fd_set* exceptfds, timeval* timeout, asio::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 = asio::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 defined(BOOST_WINDOWS) && defined(UNDER_CE)
|
|
if (result >= 0)
|
|
clear_error(ec);
|
|
# endif
|
|
return result;
|
|
#endif
|
|
}
|
|
|
|
inline int poll_read(socket_type s, asio::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 defined(UNDER_CE)
|
|
if (result >= 0)
|
|
clear_error(ec);
|
|
# endif
|
|
return result;
|
|
#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
|
|
pollfd fds;
|
|
fds.fd = s;
|
|
fds.events = POLLIN;
|
|
fds.revents = 0;
|
|
clear_error(ec);
|
|
return error_wrapper(::poll(&fds, 1, -1), ec);
|
|
#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
|
|
}
|
|
|
|
inline int poll_write(socket_type s, asio::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 defined(UNDER_CE)
|
|
if (result >= 0)
|
|
clear_error(ec);
|
|
# endif
|
|
return result;
|
|
#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
|
|
pollfd fds;
|
|
fds.fd = s;
|
|
fds.events = POLLOUT;
|
|
fds.revents = 0;
|
|
clear_error(ec);
|
|
return error_wrapper(::poll(&fds, 1, -1), ec);
|
|
#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, asio::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 = asio::error::address_family_not_supported;
|
|
return 0;
|
|
}
|
|
|
|
sockaddr_storage_type address;
|
|
DWORD address_length;
|
|
if (af == AF_INET)
|
|
{
|
|
address_length = sizeof(sockaddr_in4_type);
|
|
sockaddr_in4_type* ipv4_address =
|
|
reinterpret_cast<sockaddr_in4_type*>(&address);
|
|
ipv4_address->sin_family = AF_INET;
|
|
ipv4_address->sin_port = 0;
|
|
memcpy(&ipv4_address->sin_addr, src, sizeof(in4_addr_type));
|
|
}
|
|
else // AF_INET6
|
|
{
|
|
address_length = sizeof(sockaddr_in6_type);
|
|
sockaddr_in6_type* ipv6_address =
|
|
reinterpret_cast<sockaddr_in6_type*>(&address);
|
|
ipv6_address->sin6_family = AF_INET6;
|
|
ipv6_address->sin6_port = 0;
|
|
ipv6_address->sin6_flowinfo = 0;
|
|
ipv6_address->sin6_scope_id = scope_id;
|
|
memcpy(&ipv6_address->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(
|
|
reinterpret_cast<sockaddr*>(&address),
|
|
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(
|
|
reinterpret_cast<sockaddr*>(&address),
|
|
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 = 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 = 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, asio::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 = asio::error::address_family_not_supported;
|
|
return -1;
|
|
}
|
|
|
|
sockaddr_storage_type 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,
|
|
reinterpret_cast<sockaddr*>(&address),
|
|
&address_length), ec);
|
|
#else
|
|
int result = error_wrapper(::WSAStringToAddressA(
|
|
const_cast<char*>(src), af, 0,
|
|
reinterpret_cast<sockaddr*>(&address),
|
|
&address_length), ec);
|
|
#endif
|
|
|
|
if (af == AF_INET)
|
|
{
|
|
if (result != socket_error_retval)
|
|
{
|
|
sockaddr_in4_type* ipv4_address =
|
|
reinterpret_cast<sockaddr_in4_type*>(&address);
|
|
memcpy(dest, &ipv4_address->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)
|
|
{
|
|
sockaddr_in6_type* ipv6_address =
|
|
reinterpret_cast<sockaddr_in6_type*>(&address);
|
|
memcpy(dest, &ipv6_address->sin6_addr, sizeof(in6_addr_type));
|
|
if (scope_id)
|
|
*scope_id = ipv6_address->sin6_scope_id;
|
|
clear_error(ec);
|
|
}
|
|
}
|
|
|
|
// Windows may not set an error code on failure.
|
|
if (result == socket_error_retval && !ec)
|
|
ec = asio::error::invalid_argument;
|
|
|
|
#if defined(UNDER_CE)
|
|
if (result != socket_error_retval)
|
|
clear_error(ec);
|
|
#endif
|
|
|
|
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 = 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, asio::error_code& ec)
|
|
{
|
|
clear_error(ec);
|
|
int result = error_wrapper(::gethostname(name, namelen), ec);
|
|
#if defined(BOOST_WINDOWS) && defined(UNDER_CE)
|
|
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 asio::error_code translate_netdb_error(int error)
|
|
{
|
|
switch (error)
|
|
{
|
|
case 0:
|
|
return asio::error_code();
|
|
case HOST_NOT_FOUND:
|
|
return asio::error::host_not_found;
|
|
case TRY_AGAIN:
|
|
return asio::error::host_not_found_try_again;
|
|
case NO_RECOVERY:
|
|
return asio::error::no_recovery;
|
|
case NO_DATA:
|
|
return asio::error::no_data;
|
|
default:
|
|
BOOST_ASSERT(false);
|
|
return asio::error::invalid_argument;
|
|
}
|
|
}
|
|
|
|
inline hostent* gethostbyaddr(const char* addr, int length, int af,
|
|
hostent* result, char* buffer, int buflength, asio::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;
|
|
# if defined(UNDER_CE)
|
|
clear_error(ec);
|
|
# endif
|
|
*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, asio::error_code& ec)
|
|
{
|
|
clear_error(ec);
|
|
#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
|
|
(void)(buffer);
|
|
(void)(buflength);
|
|
(void)(ai_flags);
|
|
if (af != AF_INET)
|
|
{
|
|
ec = asio::error::address_family_not_supported;
|
|
return 0;
|
|
}
|
|
hostent* retval = error_wrapper(::gethostbyname(name), ec);
|
|
if (!retval)
|
|
return 0;
|
|
# if defined(UNDER_CE)
|
|
clear_error(ec);
|
|
# endif
|
|
*result = *retval;
|
|
return result;
|
|
#elif defined(__sun) || defined(__QNX__)
|
|
(void)(ai_flags);
|
|
if (af != AF_INET)
|
|
{
|
|
ec = 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 = 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;
|
|
*target = 0;
|
|
strncat(target, source, max_size);
|
|
}
|
|
|
|
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;
|
|
asio::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 == asio::error::host_not_found)
|
|
return EAI_NONAME;
|
|
if (ec == asio::error::host_not_found_try_again)
|
|
return EAI_AGAIN;
|
|
if (ec == asio::error::no_recovery)
|
|
return EAI_FAIL;
|
|
if (ec == 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 asio::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,
|
|
asio::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 = 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 = 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 = 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 = 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 = asio::error::no_buffer_space;
|
|
}
|
|
sprintf(serv, "%u", ntohs(port));
|
|
}
|
|
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 = asio::error::no_buffer_space;
|
|
}
|
|
sprintf(serv, "%u", ntohs(port));
|
|
}
|
|
#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 asio::error_code translate_addrinfo_error(int error)
|
|
{
|
|
switch (error)
|
|
{
|
|
case 0:
|
|
return asio::error_code();
|
|
case EAI_AGAIN:
|
|
return asio::error::host_not_found_try_again;
|
|
case EAI_BADFLAGS:
|
|
return asio::error::invalid_argument;
|
|
case EAI_FAIL:
|
|
return asio::error::no_recovery;
|
|
case EAI_FAMILY:
|
|
return asio::error::address_family_not_supported;
|
|
case EAI_MEMORY:
|
|
return 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 asio::error::host_not_found;
|
|
case EAI_SERVICE:
|
|
return asio::error::service_not_found;
|
|
case EAI_SOCKTYPE:
|
|
return asio::error::socket_type_not_supported;
|
|
default: // Possibly the non-portable EAI_SYSTEM.
|
|
#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
|
|
return asio::error_code(
|
|
WSAGetLastError(), asio::error::get_system_category());
|
|
#else
|
|
return asio::error_code(
|
|
errno, asio::error::get_system_category());
|
|
#endif
|
|
}
|
|
}
|
|
|
|
inline asio::error_code getaddrinfo(const char* host,
|
|
const char* service, const addrinfo_type* hints, addrinfo_type** result,
|
|
asio::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 asio::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, asio::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, 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*, std::size_t, char*, std::size_t, 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, addrlen, host, hostlen, serv, 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
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#endif // ASIO_DETAIL_SOCKET_OPS_HPP
|