bgpd: When bgp notices a change to shared_network inform bfd of it

When bgp is started up and reads the config in *before* it has
received interface addresses from zebra, shared_network can
be set to false in this case.  Later on once bgp attempts to
reconnect it will refigure out the shared_network again( because
it has received the data from zebra now ).  In this case
tell bfd about it.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

diff --git a/bgpd/bgp_zebra.c b/bgpd/bgp_zebra.c
index f9d096e6c643c075f25cec70c80853ad56cd50c3..e072e18c847f4bf5da10a051be0770f63ac81ff2 100644 (file)
--- a/bgpd/bgp_zebra.c
+++ b/bgpd/bgp_zebra.c
@@ -728,6 +728,7 @@ bool bgp_zebra_nexthop_set(union sockunion *local, union sockunion *remote,
        int ret = 0;
        struct interface *ifp = NULL;
        bool v6_ll_avail = true;
+       bool shared_network_original = peer->shared_network;
 
        memset(nexthop, 0, sizeof(struct bgp_nexthop));
 
@@ -892,6 +893,9 @@ bool bgp_zebra_nexthop_set(union sockunion *local, union sockunion *remote,
                        peer->shared_network = 0;
        }
 
+       if (shared_network_original != peer->shared_network)
+               bgp_peer_bfd_update_source(peer);
+
 /* KAME stack specific treatment.  */
 #ifdef KAME
        if (IN6_IS_ADDR_LINKLOCAL(&nexthop->v6_global)