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Add a configuration option for TCP keepalives (SO_KEEPALIVE), default off.

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No very good reason, but I've occasionally wanted to frob it to see if it
makes any difference to problems I'm having, and it was easy.

Tested that it does actually cause keepalives on Windows (with tcpdump);
should also work on Unix. Not implemented on Mac (does nothing), but then
neither is TCP_NODELAY.

Quite a big checkin, much of which is adding `keepalive' alongside `nodelay'
in network function calls.

[originally from svn r4309]
This commit is contained in:
Jacob Nevins
2004-06-20 17:07:38 +00:00
parent 6bcac21e36
commit 20f433efac
29 changed files with 109 additions and 51 deletions
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7
unix/uxnet.c
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@ -378,7 +378,7 @@ Socket sk_register(OSSocket sockfd, Plug plug)
}
Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
int nodelay, Plug plug)
int nodelay, int keepalive, Plug plug)
{
int s;
#ifdef IPV6
@ -433,6 +433,11 @@ Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b));
}
if (keepalive) {
int b = TRUE;
setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b));
}
/*
* Bind to local address.
*/