1 files changed, 109 insertions, 0 deletions
diff --git a/src/ip.cpp b/src/ip.cpp
new file mode 100644
index 0000000..45e5498
--- /dev/null
+++ b/src/ip.cpp
@@ -0,0 +1,109 @@
+/*
+    Copyright (c) 2010-2011 250bpm s.r.o.
+    Copyright (c) 2007-2009 iMatix Corporation
+    Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ip.hpp"
+#include "err.hpp"
+#include "platform.hpp"
+
+#if defined ZMQ_HAVE_WINDOWS
+#include "windows.hpp"
+#else
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#endif
+
+#if defined ZMQ_HAVE_OPENVMS
+#include <ioctl.h>
+#endif
+
+zmq::fd_t zmq::open_socket (int domain_, int type_, int protocol_)
+{
+    //  Setting this option result in sane behaviour when exec() functions
+    //  are used. Old sockets are closed and don't block TCP ports etc.
+#if defined ZMQ_HAVE_SOCK_CLOEXEC
+    type_ |= SOCK_CLOEXEC;
+#endif
+
+    fd_t s = socket (domain_, type_, protocol_);
+#ifdef ZMQ_HAVE_WINDOWS
+    if (s == INVALID_SOCKET)
+        return INVALID_SOCKET;
+#else
+    if (s == -1)
+        return -1;
+#endif
+
+    //  If there's no SOCK_CLOEXEC, let's try the second best option. Note that
+    //  race condition can cause socket not to be closed (if fork happens
+    //  between socket creation and this point).
+#if !defined ZMQ_HAVE_SOCK_CLOEXEC && defined FD_CLOEXEC
+    int rc = fcntl (s, F_SETFD, FD_CLOEXEC);
+    errno_assert (rc != -1);
+#endif
+
+    //  On Windows, preventing sockets to be inherited by child processes.
+#if defined ZMQ_HAVE_WINDOWS && defined HANDLE_FLAG_INHERIT
+    BOOL brc = SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0);
+    win_assert (brc);
+#endif
+
+    return s;
+}
+
+void zmq::unblock_socket (fd_t s_)
+{
+#ifdef ZMQ_HAVE_WINDOWS
+    u_long nonblock = 1;
+    int rc = ioctlsocket (s_, FIONBIO, &nonblock);
+    wsa_assert (rc != SOCKET_ERROR);
+#elif ZMQ_HAVE_OPENVMS
+    int nonblock = 1;
+    int rc = ioctl (s_, FIONBIO, &nonblock);
+    errno_assert (rc != -1);
+#else
+    int flags = fcntl (s_, F_GETFL, 0);
+    if (flags == -1)
+        flags = 0;
+    int rc = fcntl (s_, F_SETFL, flags | O_NONBLOCK);
+    errno_assert (rc != -1);
+#endif
+}
+
+void zmq::enable_ipv4_mapping (fd_t s_)
+{
+#ifdef IPV6_V6ONLY
+#ifdef ZMQ_HAVE_WINDOWS
+    DWORD flag = 0;
+#else
+    int flag = 0;
+#endif
+    int rc = setsockopt (s_, IPPROTO_IPV6, IPV6_V6ONLY, (const char*) &flag,
+        sizeof (flag));
+#ifdef ZMQ_HAVE_WINDOWS
+    wsa_assert (rc != SOCKET_ERROR);
+#else
+    errno_assert (rc == 0);
+#endif
+#endif
+}