From e550a37206528be39e4751865b46720885fd64ed Mon Sep 17 00:00:00 2001
From: Ondrej Filip <feela@network.cz>
Date: Fri, 13 Sep 2013 18:55:02 +0200
Subject: Fixes problem with OSPF neighbor router ID change. Thanx to Alexander
 V. Chernikov

---
 proto/ospf/hello.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'proto/ospf')

diff --git a/proto/ospf/hello.c b/proto/ospf/hello.c
index d5aa1b95..58e87bbf 100644
--- a/proto/ospf/hello.c
+++ b/proto/ospf/hello.c
@@ -101,6 +101,17 @@ ospf_hello_receive(struct ospf_packet *ps_i, struct ospf_iface *ifa,
     return;
   }
 
+#ifdef OSPFv2
+  if (n && (n->rid != ntohl(ps_i->routerid)))
+  {
+    OSPF_TRACE(D_EVENTS,
+	"Neighbor %I has changed router id from %R to %R.",
+	     n->ip, n->rid, ntohl(ps_i->routerid));
+    ospf_neigh_remove(n);
+    n = NULL;
+  }
+#endif
+
   if (!n)
   {
     if ((ifa->type == OSPF_IT_NBMA) || (ifa->type == OSPF_IT_PTMP))
@@ -132,7 +143,7 @@ ospf_hello_receive(struct ospf_packet *ps_i, struct ospf_iface *ifa,
 
     n = ospf_neighbor_new(ifa);
 
-    n->rid = ntohl(((struct ospf_packet *) ps)->routerid);
+    n->rid = ntohl(ps_i->routerid);
     n->ip = faddr;
     n->dr = ntohl(ps->dr);
     n->bdr = ntohl(ps->bdr);
-- 
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