diff options
| -rw-r--r-- | ospf6d/ospf6_flood.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/ospf6d/ospf6_flood.c b/ospf6d/ospf6_flood.c index 8e3e35d6bd..726ee96b9e 100644 --- a/ospf6d/ospf6_flood.c +++ b/ospf6d/ospf6_flood.c @@ -790,6 +790,18 @@ void ospf6_receive_lsa(struct ospf6_neighbor *from, ismore_recent = 1; assert(from); + /* if we receive a LSA with invalid seqnum drop it */ + if (ntohl(lsa_header->seqnum) - 1 == OSPF_MAX_SEQUENCE_NUMBER) { + if (IS_OSPF6_DEBUG_EXAMIN_TYPE(lsa_header->type)) { + zlog_debug( + "received lsa [%s Id:%pI4 Adv:%pI4] with invalid seqnum 0x%x, ignore", + ospf6_lstype_name(lsa_header->type), + &lsa_header->id, &lsa_header->adv_router, + ntohl(lsa_header->seqnum)); + } + return; + } + /* make lsa structure for received lsa */ new = ospf6_lsa_create(lsa_header); |