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initial implementation of tuning TCP keep-alives for TCP socket

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currently not fully cross-platform
work on linux
possibly work in *bsd
and could be enhanced to work on windows
This commit is contained in:
Sergey KHripchenko
2012-04-05 19:39:53 +04:00
parent 88db804bb9
commit 0c3d917926
9 changed files with 223 additions and 3 deletions
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111
src/options.cpp
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@@ -49,6 +49,10 @@ zmq::options_t::options_t () :
filter (false),
send_identity (false),
recv_identity (false),
tcp_keepalive (-1),
tcp_keepalive_cnt (-1),
tcp_keepalive_idle (-1),
tcp_keepalive_intvl (-1),
socket_id (0)
{
}
@@ -214,8 +218,75 @@ int zmq::options_t::setsockopt (int option_, const void *optval_,
ipv4only = val;
return 0;
}
}
case ZMQ_TCP_KEEPALIVE:
{
if (optvallen_ != sizeof (int)) {
errno = EINVAL;
return -1;
}
int val = *((int*) optval_);
if (val != -1 && val != 0 && val != 1) {
errno = EINVAL;
return -1;
}
#ifdef ZMQ_HAVE_TCP_KEEPALIVE
tcp_keepalive = val;
#endif
return 0;
}
case ZMQ_TCP_KEEPALIVE_CNT:
{
if (optvallen_ != sizeof (int)) {
errno = EINVAL;
return -1;
}
int val = *((int*) optval_);
if (val <= 0 && val != -1) {
errno = EINVAL;
return -1;
}
#if defined ZMQ_HAVE_TCP_KEEPALIVE && defined ZMQ_HAVE_TCP_KEEPALIVE_OPTS
tcp_keepalive_cnt = val;
#endif
return 0;
}
case ZMQ_TCP_KEEPALIVE_IDLE:
{
if (optvallen_ != sizeof (int)) {
errno = EINVAL;
return -1;
}
int val = *((int*) optval_);
if (val <= 0 && val != -1) {
errno = EINVAL;
return -1;
}
#if defined ZMQ_HAVE_TCP_KEEPALIVE && defined ZMQ_HAVE_TCP_KEEPALIVE_OPTS
tcp_keepalive_idle = val;
#endif
return 0;
}
case ZMQ_TCP_KEEPALIVE_INTVL:
{
if (optvallen_ != sizeof (int)) {
errno = EINVAL;
return -1;
}
int val = *((int*) optval_);
if (val <= 0 && val != -1) {
errno = EINVAL;
return -1;
}
#if defined ZMQ_HAVE_TCP_KEEPALIVE && defined ZMQ_HAVE_TCP_KEEPALIVE_OPTS
tcp_keepalive_intvl = val;
#endif
return 0;
}
}
errno = EINVAL;
return -1;
}
@@ -385,7 +456,43 @@ int zmq::options_t::getsockopt (int option_, void *optval_, size_t *optvallen_)
*((int*) optval_) = ipv4only;
*optvallen_ = sizeof (int);
return 0;
case ZMQ_TCP_KEEPALIVE:
if (*optvallen_ < sizeof (int)) {
errno = EINVAL;
return -1;
}
*((int*) optval_) = tcp_keepalive;
*optvallen_ = sizeof (int);
return 0;
case ZMQ_TCP_KEEPALIVE_CNT:
if (*optvallen_ < sizeof (int)) {
errno = EINVAL;
return -1;
}
*((int*) optval_) = tcp_keepalive_cnt;
*optvallen_ = sizeof (int);
return 0;
case ZMQ_TCP_KEEPALIVE_IDLE:
if (*optvallen_ < sizeof (int)) {
errno = EINVAL;
return -1;
}
*((int*) optval_) = tcp_keepalive_idle;
*optvallen_ = sizeof (int);
return 0;
case ZMQ_TCP_KEEPALIVE_INTVL:
if (*optvallen_ < sizeof (int)) {
errno = EINVAL;
return -1;
}
*((int*) optval_) = tcp_keepalive_intvl;
*optvallen_ = sizeof (int);
return 0;
case ZMQ_LAST_ENDPOINT:
// don't allow string which cannot contain the entire message
if (*optvallen_ < last_endpoint.size() + 1) {