[zeromq-dev] [PULL] x306: Implement ZMQ_TCP_KEEPALIVE* family of options to adjust TCP keepalives

[Sergey Hripchenko]

Please review & approve: https://github.com/zeromq/libzmq/pull/306.

  *   Will work where supported by OS(except of Windows). Someone(who knows Windows) could make it work on Windows with the following code:

tcp_keepalive alive;

alive.onoff = TRUE;

alive.keepalivetime = 60000;

alive.keepaliveinterval = 1000;

int bytes_ret=0;

res = WSAIoctl(socket, SIO_KEEPALIVE_VALS, &alive, sizeof(alive), NULL, 0,

    &bytes_ret, NULL, NULL);

  *   There was some objections against constants naming that is better to make them as much POSIX-like as we can. I could convert them, however:

ZMQ_TCP_KEEPALIVE

ZMQ_TCP_KEEPALIVE_CNT

ZMQ_TCP_KEEPALIVE_IDLE

ZMQ_TCP_KEEPALIVE_INTVL

Looks cleaner to me than:

ZMQ_SO_KEEPALIVE

ZMQ_TCP_KEEPCNT

ZMQ_TCP_KEEPIDLE

ZMQ_TCP_KEEPINTVL

However if you think that more POSIX-like naming is good - I can rename them.

  *   Documentation definitely should be more verbose. Someone who knows English better than me could enhance it taking my prev. commit(https://github.com/shripchenko/libzmq/commit/4b303402a76a5d2fe85ff8cdaf7a98d6dcfa94ee) as a starting point. Or kill it with fire and provide a new one.


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