2 files changed, 33 insertions, 0 deletions
diff --git a/proto/ospf/topology.c b/proto/ospf/topology.c
index 56228054..6a20a63d 100644
--- a/proto/ospf/topology.c
+++ b/proto/ospf/topology.c
@@ -502,3 +502,35 @@ ospf_top_dump(struct top_graph *f)
     }
 }
 
+/* This is very uneficient, please don't call it often */
+
+/* I should also test for every LSA if it's in some link state
+ * retransmision list for every neighbor. I will not test it.
+ * It can happen that I'll receive some strange ls ack's.
+ */
+
+int
+can_flush_lsa(struct ospf_area *oa)
+{
+  struct ospf_iface *ifa;
+  struct ospf_neighbor *n;
+  struct proto_ospf *po=oa->po;
+  int flush=1;
+
+  WALK_LIST(ifa, iface_list)
+  {
+    if(ifa->oa==oa)
+    {
+      WALK_LIST(n, ifa->neigh_list)
+      {
+        if(n->state==NEIGHBOR_EXCHANGE||n->state==NEIGHBOR_LOADING)
+	{
+	  flush=0;
+	  break;
+	}
+      }
+    }
+  }
+
+  return flush;
+}
diff --git a/proto/ospf/topology.h b/proto/ospf/topology.h
index 4181e05f..92b71438 100644
--- a/proto/ospf/topology.h
+++ b/proto/ospf/topology.h
@@ -48,5 +48,6 @@ void ospf_hash_delete(struct top_graph *, struct top_hash_entry *);
 void addifa_rtlsa(struct ospf_iface *ifa);
 void originate_rt_lsa(struct ospf_area *oa,struct proto_ospf *po);
 void originate_net_lsa(struct ospf_iface *ifa,struct proto_ospf *po);
+int can_flush_lsa(struct ospf_area *oa);
 
 #endif /* _BIRD_OSPF_TOPOLOGY_H_ */