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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.
130 lines
3.8 KiB
C++
130 lines
3.8 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 "tcp.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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void zmq::tune_tcp_socket (fd_t s_)
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{
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// Disable Nagle's algorithm. We are doing data batching on 0MQ level,
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// so using Nagle wouldn't improve throughput in anyway, but it would
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// hurt latency.
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int nodelay = 1;
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int rc = setsockopt (s_, IPPROTO_TCP, TCP_NODELAY, (char*) &nodelay,
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sizeof (int));
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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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#ifdef ZMQ_HAVE_OPENVMS
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// Disable delayed acknowledgements as they hurt latency is serious manner.
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int nodelack = 1;
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rc = setsockopt (s_, IPPROTO_TCP, TCP_NODELACK, (char*) &nodelack,
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sizeof (int));
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errno_assert (rc != SOCKET_ERROR);
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#endif
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}
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void zmq::tune_tcp_keepalives (fd_t s_, int keepalive_, int keepalive_cnt_, int keepalive_idle_, int keepalive_intvl_)
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{
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// These options are used only under certain #ifdefs below.
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(void)keepalive_;
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(void)keepalive_cnt_;
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(void)keepalive_idle_;
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(void)keepalive_intvl_;
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// If none of the #ifdefs apply, then s_ is unused.
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(void)s_;
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// Tuning TCP keep-alives if platform allows it
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// All values = -1 means skip and leave it for OS
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#ifdef ZMQ_HAVE_SO_KEEPALIVE
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if (keepalive_ != -1) {
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int rc = setsockopt (s_, SOL_SOCKET, SO_KEEPALIVE, (char*) &keepalive_, sizeof (int));
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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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#ifdef ZMQ_HAVE_TCP_KEEPCNT
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if (keepalive_cnt_ != -1) {
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int rc = setsockopt (s_, IPPROTO_TCP, TCP_KEEPCNT, &keepalive_cnt_, sizeof (int));
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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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#endif // ZMQ_HAVE_TCP_KEEPCNT
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#ifdef ZMQ_HAVE_TCP_KEEPIDLE
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if (keepalive_idle_ != -1) {
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int rc = setsockopt (s_, IPPROTO_TCP, TCP_KEEPIDLE, &keepalive_idle_, sizeof (int));
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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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#else // ZMQ_HAVE_TCP_KEEPIDLE
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#ifdef ZMQ_HAVE_TCP_KEEPALIVE
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if (keepalive_idle_ != -1) {
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int rc = setsockopt (s_, IPPROTO_TCP, TCP_KEEPALIVE, &keepalive_idle_, sizeof (int));
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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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#endif // ZMQ_HAVE_TCP_KEEPALIVE
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#endif // ZMQ_HAVE_TCP_KEEPIDLE
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#ifdef ZMQ_HAVE_TCP_KEEPINTVL
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if (keepalive_intvl_ != -1) {
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int rc = setsockopt (s_, IPPROTO_TCP, TCP_KEEPINTVL, &keepalive_intvl_, sizeof (int));
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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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#endif // ZMQ_HAVE_TCP_KEEPINTVL
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}
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#endif // ZMQ_HAVE_SO_KEEPALIVE
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}
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