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-rw-r--r--proto/ospf/lsalib.c30
1 files changed, 26 insertions, 4 deletions
diff --git a/proto/ospf/lsalib.c b/proto/ospf/lsalib.c
index 46b6d09..cd29421 100644
--- a/proto/ospf/lsalib.c
+++ b/proto/ospf/lsalib.c
@@ -1,7 +1,7 @@
/*
* BIRD -- OSPF
*
- * (c) 1999-2000 Ondrej Filip <feela@network.cz>
+ * (c) 1999 - 2000 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
@@ -18,6 +18,18 @@ flush_lsa(struct top_hash_entry *en, struct ospf_area *oa)
ospf_hash_delete(oa->gr,en);
}
+/**
+ * ospf_age
+ * @oa: ospf area
+ *
+ * This function is periodicaly invoked from area_disp(). It computes new
+ * age of all LSAs and old (@age is higher than %LSA_MAXAGE) are flushed
+ * when ever possible. If some LSA originated by router itself is older
+ * than %LSREFRESHTIME new instance is originated.
+ *
+ * RFC says, that router should check checksum of every LSA to detect some
+ * hardware problem. BIRD does not do it to minimalize CPU utilization.
+ */
void
ospf_age(struct ospf_area *oa)
{
@@ -379,11 +391,21 @@ lsa_comp(struct ospf_lsa_header *l1, struct ospf_lsa_header *l2)
return CMP_SAME;
}
-/* LSA can be temporarrily, but body must be mb_alloced. */
+/**
+ * lsa_install_new - install new LSA into database
+ * @lsa: LSA header
+ * @body pointer to LSA body
+ * @oa: current ospf_area
+ *
+ * This function ensures installing new LSA into LSA database. Old instance is
+ * replaced. Several actions are taken to detec if new routing table
+ * calculation is necessary. This is described in 13.2 of RFC 2328.
+ */
struct top_hash_entry *
-lsa_install_new(struct ospf_lsa_header *lsa, void *body, struct ospf_area *oa,
- struct proto *p)
+lsa_install_new(struct ospf_lsa_header *lsa, void *body, struct ospf_area *oa)
{
+ /* LSA can be temporarrily, but body must be mb_alloced. */
+ struct proto *p=&oa->po->proto;
int change=0;
unsigned i;
struct top_hash_entry *en;