From 9bc1808a27b35499d2438d731ade6d2cba8aa355 Mon Sep 17 00:00:00 2001
From: Ondrej Filip <feela@network.cz>
Date: Wed, 3 May 2000 00:08:48 +0000
Subject: [PATCH] Better rt and net originating.

---
 proto/ospf/iface.c    |  2 ++
 proto/ospf/neighbor.c | 14 +++++++++++++-
 proto/ospf/ospf.h     |  3 ++-
 proto/ospf/topology.c | 36 ++++++++++++++++++++++--------------
 proto/ospf/topology.h |  4 ++--
 5 files changed, 41 insertions(+), 18 deletions(-)

diff --git a/proto/ospf/iface.c b/proto/ospf/iface.c
index bce763e0..908ec587 100644
--- a/proto/ospf/iface.c
+++ b/proto/ospf/iface.c
@@ -356,6 +356,8 @@ ospf_if_notify(struct proto *p, unsigned flags, struct iface *iface)
     ospf_add_timers(ifa,p->pool);
     add_tail(&((struct proto_ospf *)p)->iface_list, NODE ifa);
     ifa->state=OSPF_IS_DOWN;
+    ifa->nlsa=NULL;
+    ifa->fadj=0;
     ospf_int_sm(ifa, ISM_UP);
   }
 
diff --git a/proto/ospf/neighbor.c b/proto/ospf/neighbor.c
index 4a44b6b2..050a253d 100644
--- a/proto/ospf/neighbor.c
+++ b/proto/ospf/neighbor.c
@@ -25,11 +25,24 @@ neigh_chstate(struct ospf_neighbor *n, u8 state)
   if(n->state!=state)
   {
     ifa=n->ifa;
+    if(n->state==NEIGHBOR_FULL)
+    {
+      ifa->fadj++;
+      n->state=state;
+      originate_rt_lsa(ifa->oa,ifa->oa->po);
+      originate_net_lsa(ifa,ifa->oa->po);
+    }
     p=(struct proto *)(ifa->proto);
   
     debug("%s: Neigbor %I changes state from \"%s\" to \"%s\".\n",
       p->name, n->rid, ospf_ns[n->state], ospf_ns[state]);
     n->state=state;
+    if(state==NEIGHBOR_FULL)
+    {
+      ifa->fadj--;
+      originate_rt_lsa(n->ifa->oa,n->ifa->oa->po);
+      originate_net_lsa(ifa,ifa->oa->po);
+    }
   }
 }
 
@@ -236,7 +249,6 @@ ospf_neigh_sm(struct ospf_neighbor *n, int event)
       break;
     case INM_LOADDONE:
         neigh_chstate(n,NEIGHBOR_FULL);
-	originate_rt_lsa(n->ifa->oa,po);
       break;
     case INM_ADJOK:
         switch(n->state)
diff --git a/proto/ospf/ospf.h b/proto/ospf/ospf.h
index 7528921c..22064b96 100644
--- a/proto/ospf/ospf.h
+++ b/proto/ospf/ospf.h
@@ -102,7 +102,8 @@ struct ospf_iface {
 #define WAIT_DMH 3	/* Value of Wait timer - not found it in RFC 
 			 * - using 3*HELLO
 			 */
-  struct top_hash_entry *nlsa;
+  struct top_hash_entry *nlsa;	/* Originated net lsa */
+  int fadj;		/* Number of full adjacent neigh */
 };
 
 struct ospf_packet {
diff --git a/proto/ospf/topology.c b/proto/ospf/topology.c
index 0020b572..56228054 100644
--- a/proto/ospf/topology.c
+++ b/proto/ospf/topology.c
@@ -211,12 +211,12 @@ addifa_rtlsa(struct ospf_iface *ifa)
 
   ifa->oa=oa;
 
-  oa->rt=originate_rt_lsa(oa,po);
+  originate_rt_lsa(oa,po);
   DBG("RT LSA: rt: %I, id: %I, type: %u\n",oa->rt->lsa.rt,oa->rt->lsa.id,oa->rt->lsa.type);
   flood_lsa(NULL,NULL,&oa->rt->lsa,po,NULL,oa);
 }
 
-struct top_hash_entry *
+void
 originate_rt_lsa(struct ospf_area *oa, struct proto_ospf *po)
 {
   struct ospf_lsa_header lsa;
@@ -241,7 +241,8 @@ originate_rt_lsa(struct ospf_area *oa, struct proto_ospf *po)
   body=originate_rt_lsa_body(oa, &lsa.length, po);
   lsasum_calculate(&lsa,body,po);
   en=lsa_install_new(&lsa, body, oa, &po->proto);
-  return en;
+  oa->rt=en;
+  flood_lsa(NULL,NULL,&oa->rt->lsa,po,NULL,oa);
 }
 
 void *
@@ -252,11 +253,7 @@ originate_net_lsa_body(struct ospf_iface *ifa, u16 *length,
   struct ospf_neighbor *n;
   u32 *body;
 
-  WALK_LIST(n,ifa->neigh_list)
-  {
-    if(n->state==NEIGHBOR_FULL) i++;
-  }
-  body=mb_alloc(po->proto.pool,sizeof(u32)*i);
+  body=mb_alloc(po->proto.pool,sizeof(u32)*ifa->fadj);
   i=1;
   *body=po->proto.cf->global->router_id;
   WALK_LIST(n,ifa->neigh_list)
@@ -271,7 +268,7 @@ originate_net_lsa_body(struct ospf_iface *ifa, u16 *length,
   return body;
 }
 
-struct top_hash_entry *
+void
 originate_net_lsa(struct ospf_iface *ifa, struct proto_ospf *po)
 {
   struct ospf_lsa_header lsa;
@@ -281,6 +278,20 @@ originate_net_lsa(struct ospf_iface *ifa, struct proto_ospf *po)
 
   DBG("%s: Originating Net lsa for iface \"%s\".\n", po->proto.name, ifa->iface->name);
 
+  if(ifa->state!=OSPF_IS_DR) return;
+
+  if(ifa->fadj==0)
+  {
+    if(ifa->nlsa==NULL) return;
+
+    lsa.sn+=1;
+    lsa.age=LSA_MAXAGE;
+    flood_lsa(NULL,NULL,&ifa->nlsa->lsa,po,NULL,ifa->oa);
+    /* FIXME delete LSA */
+    ifa->nlsa=NULL;
+    return ;
+  }
+
   lsa.age=0;
   lsa.id=rtid;
   lsa.type=LSA_T_NET;
@@ -291,17 +302,14 @@ originate_net_lsa(struct ospf_iface *ifa, struct proto_ospf *po)
   }
   else
   {
-    lsa.sn=ifa->nlsa->lsa.sn+1;
+    lsa.sn+=1;
   }
   body=originate_net_lsa_body(ifa, &lsa.length, po);
   lsasum_calculate(&lsa,body,po);
   en=lsa_install_new(&lsa, body, ifa->oa, &po->proto);
-  return en;
+  flood_lsa(NULL,NULL,&ifa->nlsa->lsa,po,NULL,ifa->oa);
 }
 
-
-  
-
 static void
 ospf_top_ht_alloc(struct top_graph *f)
 {
diff --git a/proto/ospf/topology.h b/proto/ospf/topology.h
index 5514f5e9..4181e05f 100644
--- a/proto/ospf/topology.h
+++ b/proto/ospf/topology.h
@@ -46,7 +46,7 @@ struct top_hash_entry *ospf_hash_find(struct top_graph *, u32 lsa, u32 rtr, u32
 struct top_hash_entry *ospf_hash_get(struct top_graph *, u32 lsa, u32 rtr, u32 type);
 void ospf_hash_delete(struct top_graph *, struct top_hash_entry *);
 void addifa_rtlsa(struct ospf_iface *ifa);
-struct top_hash_entry *originate_rt_lsa(struct ospf_area *oa,
-  struct proto_ospf *po);
+void originate_rt_lsa(struct ospf_area *oa,struct proto_ospf *po);
+void originate_net_lsa(struct ospf_iface *ifa,struct proto_ospf *po);
 
 #endif /* _BIRD_OSPF_TOPOLOGY_H_ */