From 66bed4f4f0235c1eb6edb0a2f6bd4aaf47e5a7f8 Mon Sep 17 00:00:00 2001 From: Michael Lambert Date: Tue, 28 Jul 2009 11:26:14 -0400 Subject: bgpd: Workaround for invalid MBGP next hop * bgp_attr.c: (bgp_mp_reach_parse) There are some interoperability issues for MBGP (particularly IPv4 multicast NLRI) between different implementations. In order to get some next hops to install correctly in the BGP tables, it appears to be necessary to copy the multiprotocol next hop into the base next hop field. This is related to differences in RFC 2283 and RFC 2858. --- bgpd/bgp_attr.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c index a664858c..5e7536ae 100644 --- a/bgpd/bgp_attr.c +++ b/bgpd/bgp_attr.c @@ -1333,6 +1333,9 @@ bgp_mp_reach_parse (struct peer *peer, bgp_size_t length, struct attr *attr, { case 4: stream_get (&attre->mp_nexthop_global_in, s, 4); + /* Probably needed for RFC 2283 */ + if (attr->nexthop.s_addr == 0) + memcpy(&attr->nexthop.s_addr, &attre->mp_nexthop_global_in, 4); break; case 12: { -- cgit v1.2.1