OSPF: Fixes some issues with link detection

Thanks to Bernardo Figueiredo and Israel G. Lugo for the bugreport.

2 files changed, 9 insertions, 2 deletions

diff --git a/proto/ospf/iface.c b/proto/ospf/iface.c
index 9b0f7797..77ce839a 100644
--- a/proto/ospf/iface.c
+++ b/proto/ospf/iface.c
@@ -493,8 +493,11 @@ ospf_iface_add(struct object_lock *lock)
     ifa->flood_queue = mb_allocz(ifa->pool, ifa->flood_queue_size * sizeof(void *));
   }
 
-  /* Do iface UP, unless there is no link and we use link detection */
-  ospf_iface_sm(ifa, (ifa->check_link && !(ifa->iface->flags & IF_LINK_UP)) ? ISM_LOOP : ISM_UP);
+  /* Do iface UP, unless there is no link (then wait in LOOP state) */
+  if (!ifa->check_link || (ifa->iface->flags & IF_LINK_UP))
+    ospf_iface_sm(ifa, ISM_UP);
+  else
+    ospf_iface_chstate(ifa, OSPF_IS_LOOP);
 }
 
 static inline void
diff --git a/proto/ospf/packet.c b/proto/ospf/packet.c
index fb63e61c..6b8fd7b5 100644
--- a/proto/ospf/packet.c
+++ b/proto/ospf/packet.c
@@ -231,6 +231,10 @@ ospf_rx_hook(sock *sk, int len)
   const char *err_dsc = NULL;
   uint err_val = 0;
 
+  /* Should not happen */
+  if (ifa->state <= OSPF_IS_LOOP)
+    return 1;
+
   int src_local, dst_local, dst_mcast;
   src_local = ipa_in_net(sk->faddr, ifa->addr->prefix, ifa->addr->pxlen);
   dst_local = ipa_equal(sk->laddr, ifa->addr->ip);