From 736d440845c8c0cfdb56b86254887bab5fc7f3f5 Mon Sep 17 00:00:00 2001 From: Vasilis Tsiligiannis Date: Mon, 20 Jul 2009 01:59:10 +0300 Subject: bgpd: Delete AS_CONFED_SEQUENCE when prepending an AS_SEQUENCE type segment AS_CONFED_SEQUENCE segment should always be deleted when prepending (e.g. with a route-map) an AS_SEQUENCE segment to an AS path. Otherwise, AS_CONFED_SEQUENCE will not be deleted later when updating EBGP peers (since it is not the leftmost segment) and will leak outside the confederation. --- bgpd/bgp_aspath.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'bgpd/bgp_aspath.c') diff --git a/bgpd/bgp_aspath.c b/bgpd/bgp_aspath.c index e65541f9..440815b4 100644 --- a/bgpd/bgp_aspath.c +++ b/bgpd/bgp_aspath.c @@ -1208,6 +1208,10 @@ aspath_prepend (struct aspath *as1, struct aspath *as2) while (seg1 && seg1->next) seg1 = seg1->next; + /* Delete any AS_CONFED_SEQUENCE segment from as2. */ + if (seg1->type == AS_SEQUENCE && seg2->type == AS_CONFED_SEQUENCE) + as2 = aspath_delete_confed_seq (as2); + /* Compare last segment type of as1 and first segment type of as2. */ if (seg1->type != seg2->type) return aspath_merge (as1, as2); -- cgit v1.2.1