ospf6d: handle seqnum wrapping
Signed-off-by: Shrijeet Mukherjee <shm at cumulusnetworks.com>
Reviewed-by: Dinesh G Dutt <ddutt at cumulusnetworks.com>
[DL: mechanical adjust to rebase]
[DL: adjust to removal of timerwheel code]
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
diff --git a/ospf6d/ospf6_flood.c b/ospf6d/ospf6_flood.c
index e02a432..7f6b285 100644
--- a/ospf6d/ospf6_flood.c
+++ b/ospf6d/ospf6_flood.c
@@ -230,6 +230,25 @@
else
lsa->expire = NULL;
+ if (OSPF6_LSA_IS_SEQWRAP(lsa) &&
+ ! (CHECK_FLAG(lsa->flag,OSPF6_LSA_SEQWRAPPED) &&
+ lsa->header->seqnum == htonl(OSPF_MAX_SEQUENCE_NUMBER)))
+ {
+ if (IS_OSPF6_DEBUG_EXAMIN_TYPE (lsa->header->type))
+ zlog_debug("lsa install wrapping: sequence 0x%x",
+ ntohl(lsa->header->seqnum));
+ SET_FLAG(lsa->flag, OSPF6_LSA_SEQWRAPPED);
+ /* in lieu of premature_aging, since we do not want to recreate this lsa
+ * and/or mess with timers etc, we just want to wrap the sequence number
+ * and reflood the lsa before continuing.
+ * NOTE: Flood needs to be called right after this function call, by the
+ * caller
+ */
+ lsa->header->seqnum = htonl (OSPF_MAX_SEQUENCE_NUMBER);
+ lsa->header->age = htons (OSPF_LSA_MAXAGE);
+ ospf6_lsa_checksum (lsa->header);
+ }
+
/* actually install */
lsa->installed = now;
ospf6_lsdb_add (lsa, lsa->lsdb);