Corinna Vinschen 8ccffddc91 Cygwin: tcp: Support TCP_KEEPIDLE, TCP_KEEPCNT, TCP_KEEPINTVL
Use WSAIoctl(SIO_KEEPALIVE_VALS) on older systems.

Make sure that keep-alive timeout is equivalent to
TCP_KEEPIDLE + TCP_KEEPCNT * TCP_KEEPINTVL on older systems,
even with TCP_KEEPCNT being a fixed value on those systems.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2020-07-01 20:30:52 +02:00
..