From 3728267827e83bc095956b16256feae9e28adce7 Mon Sep 17 00:00:00 2001
From: Ondrej Filip <feela@network.cz>
Date: Wed, 31 May 2000 18:21:42 +0000
Subject: [PATCH] And finally, Premature aging works. :-)

---
 proto/ospf/lsack.c  |  2 ++
 proto/ospf/lsalib.c |  9 +++++++--
 proto/ospf/lsupd.c  | 15 +++++++++------
 3 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/proto/ospf/lsack.c b/proto/ospf/lsack.c
index 89397288..8b6b280c 100644
--- a/proto/ospf/lsack.c
+++ b/proto/ospf/lsack.c
@@ -191,6 +191,8 @@ ospf_lsack_rx(struct ospf_lsack_packet *ps, struct proto *p,
 
     if(lsa_comp(&lsa,&en->lsa)!=CMP_SAME)
     {
+      if((lsa.sn==LSA_MAXSEQNO)&&(lsa.age==LSA_MAXAGE)) continue;
+
       debug("%s: Strange LS acknoledgement from %I\n",p->name,n->ip);
       debug("%s: Id: %I, Rt: %I, Type: %u\n",p->name,lsa.id,lsa.rt,lsa.type);
       debug("%s: I have: Age: %4u, Seqno: 0x%08x\n",p->name,en->lsa.age,
diff --git a/proto/ospf/lsalib.c b/proto/ospf/lsalib.c
index 62ea0b86..d6317125 100644
--- a/proto/ospf/lsalib.c
+++ b/proto/ospf/lsalib.c
@@ -349,8 +349,13 @@ int
 lsa_comp(struct ospf_lsa_header *l1, struct ospf_lsa_header *l2)
 			/* Return codes from point of view of l1 */
 {
-  if(l1->sn>l2->sn) return CMP_NEWER;
-  if(l1->sn<l2->sn) return CMP_OLDER;
+  u32 sn1,sn2;
+
+  sn1=l1->sn-LSA_INITSEQNO+1;
+  sn2=l2->sn-LSA_INITSEQNO+1;
+
+  if(sn1>sn2) return CMP_NEWER;
+  if(sn1<sn2) return CMP_OLDER;
 
   if(l1->checksum=!l2->checksum)
     return l1->checksum<l2->checksum ? CMP_OLDER : CMP_NEWER;
diff --git a/proto/ospf/lsupd.c b/proto/ospf/lsupd.c
index 19a663b8..798aa1e3 100644
--- a/proto/ospf/lsupd.c
+++ b/proto/ospf/lsupd.c
@@ -44,7 +44,6 @@ flood_lsa(struct ospf_neighbor *n, struct ospf_lsa_header *hn,
       if(nn->state<NEIGHBOR_EXCHANGE) continue;
       if(nn->state<NEIGHBOR_FULL)
       {
-
         if((en=ospf_hash_find_header(nn->lsrqh,hh))!=NULL)
 	{
 	  switch(lsa_comp(hh,&en->lsa))
@@ -93,9 +92,12 @@ flood_lsa(struct ospf_neighbor *n, struct ospf_lsa_header *hn,
           s_rem_node(SNODE en);
           ospf_hash_delete(nn->lsrth, en);
         }
+        ret=1;
       }
     }
+
     if(ret==0) continue;
+
     if(ifa==iff)
     {
       if((n->rid==iff->drid)||n->rid==iff->bdrid) continue;
@@ -307,8 +309,8 @@ ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p,
       continue;
     }
     ntohlsah(lsa,&lsatmp);
-    DBG("Processing update Type: %u ID: %I RT: %I\n",lsatmp.type,
-        lsatmp.id, lsatmp.rt);
+    DBG("Processing update Type: %u ID: %I RT: %I, Sn: 0x%08x\n",lsatmp.type,
+      lsatmp.id, lsatmp.rt, lsatmp.sn);
     lsadb=ospf_hash_find_header(oa->gr, &lsatmp);
 
     /* pg 143 (4) */
@@ -358,14 +360,15 @@ ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p,
        {
          struct top_hash_entry *en;
 
+         if((lsatmp.age==LSA_MAXAGE)&&(lsatmp.sn==LSA_MAXSEQNO)) continue;
+
 	 lsatmp.age=LSA_MAXAGE;
 	 lsatmp.sn=LSA_MAXSEQNO;
+         lsa->age=htons(LSA_MAXAGE);
+         lsa->sn=htonl(LSA_MAXSEQNO);
 	 debug("%s: Premature aging self originated lsa.\n",p->name);
          debug("%s: Type: %d, Id: %I, Rt: %I\n", p->name, lsatmp.type,
            lsatmp.id, lsatmp.rt);
-         body=mb_alloc(p->pool,lsatmp.length-sizeof(struct ospf_lsa_header));
-         ntohlsab(lsa+1,body,lsatmp.type,
-           lsatmp.length-sizeof(struct ospf_lsa_header));
 	 lsasum_check(lsa,(lsa+1),po);
 	 lsatmp.checksum=ntohs(lsa->checksum);
          flood_lsa(NULL,lsa,&lsatmp,po,NULL,oa,0);