diff options
| author | Stuart Henderson <sthen@cvs.openbsd.org> | 2011-07-06 23:44:21 +0000 |
|---|---|---|
| committer | Stuart Henderson <sthen@cvs.openbsd.org> | 2011-07-06 23:44:21 +0000 |
| commit | 68494a1c586f98ca697a91771fddff329f1dcf14 (patch) | |
| tree | add29116d30508f173c5db57724b3e51943d22f7 /sys/netinet/tcp_usrreq.c | |
| parent | eec1e28e98046e35507e4a84c524322c3bce684c (diff) | |
Add sysctl net.inet.tcp.always_keepalive, when this is set the system
behaves as if SO_KEEPALIVE was set on all TCP sockets, forcing keepalives
to be sent every net.inet.tcp.keepidle half-seconds.
In conjunction with a keepidle value greatly reduced from the default,
this can be useful for keeping sessions open if you are stuck on a network
with short NAT or firewall timeouts.
Feedback from various people, ok henning@ claudio@
Diffstat (limited to 'sys/netinet/tcp_usrreq.c')
| -rw-r--r-- | sys/netinet/tcp_usrreq.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/netinet/tcp_usrreq.c b/sys/netinet/tcp_usrreq.c index 2e14907f448..6f70aaf3184 100644 --- a/sys/netinet/tcp_usrreq.c +++ b/sys/netinet/tcp_usrreq.c @@ -1,4 +1,4 @@ -/* $OpenBSD: tcp_usrreq.c,v 1.107 2011/04/28 09:56:27 claudio Exp $ */ +/* $OpenBSD: tcp_usrreq.c,v 1.108 2011/07/06 23:44:20 sthen Exp $ */ /* $NetBSD: tcp_usrreq.c,v 1.20 1996/02/13 23:44:16 christos Exp $ */ /* @@ -909,6 +909,10 @@ tcp_sysctl(name, namelen, oldp, oldlenp, newp, newlen) case TCPCTL_DROP: return (tcp_ident(oldp, oldlenp, newp, newlen, 1)); + case TCPCTL_ALWAYS_KEEPALIVE: + return (sysctl_int(oldp, oldlenp, newp, newlen, + &tcp_always_keepalive)); + #ifdef TCP_ECN case TCPCTL_ECN: return (sysctl_int(oldp, oldlenp, newp, newlen, |