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Turn on SO_KEEPALIVE on network connections. Since we limit the number

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of connections, we cannot afford to allow "disappeared" client to cause
us to leave one of the 14 connections open and hanging in a read() forever.

(SO_KEEPALIVE causes probe packets to be sent after a few hours of IDLE
time where no data has been transferred.  Sup should NEVER do this, so the
only time it will have an effect is if it looses the remote machine)
This commit is contained in:
Peter Wemm 1996-09-06 16:08:32 +00:00
parent 40c20cfcd6
commit 95de3496b4
1 changed files with 5 additions and 0 deletions
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5
usr.sbin/sup/lib/scm.c
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@ -69,6 +69,9 @@
* since Tahoe version of <netinet/in.h> does not define them.
*
* $Log: scm.c,v $
* Revision 1.2 1995/12/26 05:02:49 peter
* Apply ports/net/sup/patches/patch-aa...
*
* Revision 1.1.1.1 1995/12/26 04:54:47 peter
* Import the unmodified version of the sup that we are using.
* The heritage of this version is not clear. It appears to be NetBSD
@ -268,6 +271,8 @@ char *server;
return (scmerr (errno, stderr, "Can't create socket for connections"));
if (setsockopt (sock,SOL_SOCKET,SO_REUSEADDR,(char *)&one,sizeof(int)) < 0)
(void) scmerr (errno, stderr, "Can't set SO_REUSEADDR socket option");
if (setsockopt (sock,SOL_SOCKET,SO_KEEPALIVE,(char *)&one,sizeof(int)) < 0)
(void) scmerr (errno, stderr, "Can't set SO_KEEPALIVE socket option");
(void) bzero ((char *)&sin,sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = port;