In lsa_merge() check if the LSA changed. If it did not change just free the

new one and use the old one. This will reduce the amount of updates sent.
OK norby@

1 files changed, 12 insertions, 4 deletions

diff --git a/usr.sbin/ospfd/rde_lsdb.c b/usr.sbin/ospfd/rde_lsdb.c
index f5686a35d43..5239f7b2cac 100644
--- a/usr.sbin/ospfd/rde_lsdb.c
+++ b/usr.sbin/ospfd/rde_lsdb.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rde_lsdb.c,v 1.14 2005/05/24 06:55:21 claudio Exp $ */
+/*	$OpenBSD: rde_lsdb.c,v 1.15 2005/05/24 07:13:00 claudio Exp $ */
 
 /*
  * Copyright (c) 2004, 2005 Claudio Jeker <claudio@openbsd.org>
@@ -578,10 +578,18 @@ lsa_merge(struct rde_nbr *nbr, struct lsa *lsa, struct vertex *v)
 		return;
 	}
 
-	/* TODO check for changes */
-
-	/* set the seq_num to the current on. lsa_refresh() will do the ++ */
+	/* set the seq_num to the current one. lsa_refresh() will do the ++ */
 	lsa->hdr.seq_num = v->lsa->hdr.seq_num;
+
+	/* compare LSA most header fields are equal so don't check them */
+	if (lsa->hdr.len == v->lsa->hdr.len &&
+	    lsa->hdr.opts == v->lsa->hdr.opts &&
+	    memcmp(&lsa->data, &v->lsa->data, ntohs(lsa->hdr.len) -
+	    sizeof(struct lsa_hdr)) == 0) {
+		free(lsa);
+		return;
+	}
+
 	/* overwrite the lsa all other fields are unaffected */
 	free(v->lsa);
 	v->lsa = lsa;