pimd: Prevent loopback from forming neighbor

This code prevents pim from forming a neighbor relationship
with itself by preventing pim from sending a hello
out the loopback interface if we have pim configured
on an interface.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/pimd/pim_pim.c b/pimd/pim_pim.c
index 959663433d..a3136b61b2 100644
--- a/pimd/pim_pim.c
+++ b/pimd/pim_pim.c
@@ -584,6 +584,9 @@ static int pim_hello_send(struct interface *ifp,
   pim_ifp = ifp->info;
   zassert(pim_ifp);
 
+  if (if_is_loopback (ifp))
+    return 0;
+
   if (hello_send(ifp, holdtime)) {
     ++pim_ifp->pim_ifstat_hello_sendfail;