1 files changed, 143 insertions, 0 deletions
diff --git a/src/tcp.cpp b/src/tcp.cpp
new file mode 100755
index 0000000..a02ea15
--- /dev/null
+++ b/src/tcp.cpp
@@ -0,0 +1,143 @@
+/*
+    Copyright (c) 2007-2013 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 "tcp.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
+
+void zmq::tune_tcp_socket (fd_t s_)
+{
+    //  Disable Nagle's algorithm. We are doing data batching on 0MQ level,
+    //  so using Nagle wouldn't improve throughput in anyway, but it would
+    //  hurt latency.
+    int nodelay = 1;
+    int rc = setsockopt (s_, IPPROTO_TCP, TCP_NODELAY, (char*) &nodelay,
+        sizeof (int));
+#ifdef ZMQ_HAVE_WINDOWS
+    wsa_assert (rc != SOCKET_ERROR);
+#else
+    errno_assert (rc == 0);
+#endif
+
+#ifdef ZMQ_HAVE_OPENVMS
+    //  Disable delayed acknowledgements as they hurt latency is serious manner.
+    int nodelack = 1;
+    rc = setsockopt (s_, IPPROTO_TCP, TCP_NODELACK, (char*) &nodelack,
+        sizeof (int));
+    errno_assert (rc != SOCKET_ERROR);
+#endif
+}
+
+void zmq::set_tcp_send_buffer (fd_t sockfd_, int bufsize_)
+{
+    const int rc = setsockopt (sockfd_, SOL_SOCKET, SO_SNDBUF,
+        (char*) &bufsize_, sizeof bufsize_);
+#ifdef ZMQ_HAVE_WINDOWS
+    wsa_assert (rc != SOCKET_ERROR);
+#else
+    errno_assert (rc == 0);
+#endif
+}
+
+void zmq::set_tcp_receive_buffer (fd_t sockfd_, int bufsize_)
+{
+    const int rc = setsockopt (sockfd_, SOL_SOCKET, SO_RCVBUF,
+        (char*) &bufsize_, sizeof bufsize_);
+#ifdef ZMQ_HAVE_WINDOWS
+    wsa_assert (rc != SOCKET_ERROR);
+#else
+    errno_assert (rc == 0);
+#endif
+}
+
+void zmq::tune_tcp_keepalives (fd_t s_, int keepalive_, int keepalive_cnt_, int keepalive_idle_, int keepalive_intvl_)
+{
+    // These options are used only under certain #ifdefs below.
+    (void)keepalive_;
+    (void)keepalive_cnt_;
+    (void)keepalive_idle_;
+    (void)keepalive_intvl_;
+
+    // If none of the #ifdefs apply, then s_ is unused.
+    (void)s_;
+
+    //  Tuning TCP keep-alives if platform allows it
+    //  All values = -1 means skip and leave it for OS
+#ifdef ZMQ_HAVE_WINDOWS
+    if (keepalive_ != -1) {
+        tcp_keepalive keepalive_opts;
+        keepalive_opts.onoff = keepalive_;
+        keepalive_opts.keepalivetime = keepalive_idle_ != -1 ? keepalive_idle_ * 1000 : 7200000;
+        keepalive_opts.keepaliveinterval = keepalive_intvl_ != -1 ? keepalive_intvl_ * 1000 : 1000;
+        DWORD num_bytes_returned;
+        int rc = WSAIoctl(s_, SIO_KEEPALIVE_VALS, &keepalive_opts, sizeof(keepalive_opts), NULL, 0, &num_bytes_returned, NULL, NULL);
+        wsa_assert (rc != SOCKET_ERROR);
+    }
+#else
+#ifdef ZMQ_HAVE_SO_KEEPALIVE
+    if (keepalive_ != -1) {
+        int rc = setsockopt (s_, SOL_SOCKET, SO_KEEPALIVE, (char*) &keepalive_, sizeof (int));
+        errno_assert (rc == 0);
+
+#ifdef ZMQ_HAVE_TCP_KEEPCNT
+        if (keepalive_cnt_ != -1) {
+            int rc = setsockopt (s_, IPPROTO_TCP, TCP_KEEPCNT, &keepalive_cnt_, sizeof (int));
+            errno_assert (rc == 0);
+        }
+#endif // ZMQ_HAVE_TCP_KEEPCNT
+
+#ifdef ZMQ_HAVE_TCP_KEEPIDLE
+        if (keepalive_idle_ != -1) {
+            int rc = setsockopt (s_, IPPROTO_TCP, TCP_KEEPIDLE, &keepalive_idle_, sizeof (int));
+            errno_assert (rc == 0);
+        }
+#else // ZMQ_HAVE_TCP_KEEPIDLE
+#ifdef ZMQ_HAVE_TCP_KEEPALIVE
+        if (keepalive_idle_ != -1) {
+            int rc = setsockopt (s_, IPPROTO_TCP, TCP_KEEPALIVE, &keepalive_idle_, sizeof (int));
+            errno_assert (rc == 0);
+        }
+#endif // ZMQ_HAVE_TCP_KEEPALIVE
+#endif // ZMQ_HAVE_TCP_KEEPIDLE
+
+#ifdef ZMQ_HAVE_TCP_KEEPINTVL
+        if (keepalive_intvl_ != -1) {
+            int rc = setsockopt (s_, IPPROTO_TCP, TCP_KEEPINTVL, &keepalive_intvl_, sizeof (int));
+            errno_assert (rc == 0);
+        }
+#endif // ZMQ_HAVE_TCP_KEEPINTVL
+    }
+#endif // ZMQ_HAVE_SO_KEEPALIVE
+#endif // ZMQ_HAVE_WINDOWS
+}