diff options
| author | Claudio Jeker <claudio@cvs.openbsd.org> | 2010-06-26 19:49:55 +0000 |
|---|---|---|
| committer | Claudio Jeker <claudio@cvs.openbsd.org> | 2010-06-26 19:49:55 +0000 |
| commit | 65037ace5cd66de6d2def3c899589e4b1a811e76 (patch) | |
| tree | a766723381f4e38e468db5f62fee760a292234d0 /sys/netinet | |
| parent | d2627aea56cfdda0e369bfc25115206f9e3077c2 (diff) | |
Implement a simple keepalive mechanism in gre(4) that is compatible with
the one used by Cisco. It sends a return gre packet inside a gre packet
to the other side and expects it to return.
OK deraadt, reyk additional testing by sthen
Diffstat (limited to 'sys/netinet')
| -rw-r--r-- | sys/netinet/ip_gre.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/netinet/ip_gre.c b/sys/netinet/ip_gre.c index a0652b1ed3c..b53af449470 100644 --- a/sys/netinet/ip_gre.c +++ b/sys/netinet/ip_gre.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ip_gre.c,v 1.37 2010/05/11 09:22:56 claudio Exp $ */ +/* $OpenBSD: ip_gre.c,v 1.38 2010/06/26 19:49:54 claudio Exp $ */ /* $NetBSD: ip_gre.c,v 1.9 1999/10/25 19:18:11 drochner Exp $ */ /* @@ -187,6 +187,11 @@ gre_input2(m , hlen, proto) af = AF_INET6; break; #endif + case 0: + /* keepalive reply, retrigger hold timer */ + gre_recv_keepalive(sc); + m_freem(m); + return (1); #ifdef MPLS case ETHERTYPE_MPLS: case ETHERTYPE_MPLS_MCAST: |