mirror of
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105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
/*
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Copyright (c) 2010-2011 250bpm s.r.o.
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Copyright (c) 2007-2009 iMatix Corporation
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Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ 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 as published by
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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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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public 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 "ip.hpp"
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#include "err.hpp"
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#include "platform.hpp"
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#if defined ZMQ_HAVE_WINDOWS
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#include "windows.hpp"
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#else
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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 <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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if (s == retired_fd)
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return retired_fd;
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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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#ifdef 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 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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#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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