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https://github.com/zeromq/libzmq.git
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022cf2aeaa
Solution: replace tabes with spaces
176 lines
5.0 KiB
C++
176 lines
5.0 KiB
C++
/*
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Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
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This file is part of libzmq, the ZeroMQ core engine in C++.
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libzmq is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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As a special exception, the Contributors give you permission to link
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this library with independent modules to produce an executable,
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regardless of the license terms of these independent modules, and to
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copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the
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terms and conditions of the license of that module. An independent
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module is a module which is not derived from or based on this library.
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If you modify this library, you must extend this exception to your
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version of the library.
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libzmq is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.hpp"
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#include "ip.hpp"
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#include "err.hpp"
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#if !defined ZMQ_HAVE_WINDOWS
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#endif
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#if defined ZMQ_HAVE_OPENVMS
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#include <ioctl.h>
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#endif
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zmq::fd_t zmq::open_socket (int domain_, int type_, int protocol_)
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{
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// Setting this option result in sane behaviour when exec() functions
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// are used. Old sockets are closed and don't block TCP ports etc.
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#if defined ZMQ_HAVE_SOCK_CLOEXEC
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type_ |= SOCK_CLOEXEC;
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#endif
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fd_t s = socket (domain_, type_, protocol_);
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#ifdef ZMQ_HAVE_WINDOWS
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if (s == INVALID_SOCKET)
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return INVALID_SOCKET;
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#else
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if (s == -1)
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return -1;
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#endif
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// If there's no SOCK_CLOEXEC, let's try the second best option. Note that
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// race condition can cause socket not to be closed (if fork happens
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// between socket creation and this point).
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#if !defined ZMQ_HAVE_SOCK_CLOEXEC && defined FD_CLOEXEC
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int rc = fcntl (s, F_SETFD, FD_CLOEXEC);
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errno_assert (rc != -1);
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#endif
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// On Windows, preventing sockets to be inherited by child processes.
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#if defined ZMQ_HAVE_WINDOWS && defined HANDLE_FLAG_INHERIT
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BOOL brc = SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0);
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win_assert (brc);
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#endif
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return s;
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}
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void zmq::unblock_socket (fd_t s_)
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{
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#if defined ZMQ_HAVE_WINDOWS
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u_long nonblock = 1;
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int rc = ioctlsocket (s_, FIONBIO, &nonblock);
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wsa_assert (rc != SOCKET_ERROR);
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#elif defined ZMQ_HAVE_OPENVMS
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int nonblock = 1;
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int rc = ioctl (s_, FIONBIO, &nonblock);
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errno_assert (rc != -1);
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#else
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int flags = fcntl (s_, F_GETFL, 0);
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if (flags == -1)
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flags = 0;
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int rc = fcntl (s_, F_SETFL, flags | O_NONBLOCK);
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errno_assert (rc != -1);
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#endif
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}
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void zmq::enable_ipv4_mapping (fd_t s_)
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{
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(void) s_;
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#ifdef IPV6_V6ONLY
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#ifdef ZMQ_HAVE_WINDOWS
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DWORD flag = 0;
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#else
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int flag = 0;
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#endif
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int rc = setsockopt (s_, IPPROTO_IPV6, IPV6_V6ONLY, (const char*) &flag,
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sizeof (flag));
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#ifdef ZMQ_HAVE_WINDOWS
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wsa_assert (rc != SOCKET_ERROR);
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#else
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errno_assert (rc == 0);
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#endif
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#endif
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}
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int zmq::get_peer_ip_address (fd_t sockfd_, std::string &ip_addr_)
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{
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int rc;
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struct sockaddr_storage ss;
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#if defined ZMQ_HAVE_HPUX || defined ZMQ_HAVE_WINDOWS
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int addrlen = static_cast <int> (sizeof ss);
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#else
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socklen_t addrlen = sizeof ss;
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#endif
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rc = getpeername (sockfd_, (struct sockaddr*) &ss, &addrlen);
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#ifdef ZMQ_HAVE_WINDOWS
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if (rc == SOCKET_ERROR) {
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const int last_error = WSAGetLastError();
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wsa_assert (last_error != WSANOTINITIALISED &&
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last_error != WSAEFAULT &&
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last_error != WSAEINPROGRESS &&
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last_error != WSAENOTSOCK);
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return 0;
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}
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#else
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if (rc == -1) {
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errno_assert (errno != EBADF &&
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errno != EFAULT &&
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errno != ENOTSOCK);
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return 0;
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}
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#endif
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char host [NI_MAXHOST];
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rc = getnameinfo ((struct sockaddr*) &ss, addrlen, host, sizeof host,
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NULL, 0, NI_NUMERICHOST);
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if (rc != 0)
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return 0;
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ip_addr_ = host;
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union {
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struct sockaddr sa;
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struct sockaddr_storage sa_stor;
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} u;
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u.sa_stor = ss;
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return (int) u.sa.sa_family;
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}
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void zmq::set_ip_type_of_service (fd_t s_, int iptos)
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{
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int rc = setsockopt(s_, IPPROTO_IP, IP_TOS, reinterpret_cast<const char*>(&iptos), sizeof(iptos));
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#ifdef ZMQ_HAVE_WINDOWS
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wsa_assert (rc != SOCKET_ERROR);
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#else
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errno_assert (rc == 0);
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#endif
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}
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