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https://github.com/zeromq/libzmq.git
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f0f16505e5
Copyrights had become ads for Sustrik's corporate sponsors, going against the original agreement to share copyrights with the community (that agreement was: one line stating iMatix copyright + one reference to AUTHORS file). The proliferation of corporate ads is also unfair to the many individual authors. I've removed ALL corporate title from the source files so the copyright statements can now be centralized in AUTHORS and source files can be properly updated on an annual basis.
111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
/*
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Copyright (c) 2007-2013 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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#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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