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| author | Martin Winter <mwinter@opensourcerouting.org> | 2021-07-23 09:32:55 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-07-23 09:32:55 +0200 |
| commit | 09cfdbff2b4b1fe66ef96310d77398191c6e5807 (patch) | |
| tree | 4d1577402fc8100c7c448ba2f0df9fdc8add6446 | |
| parent | 2eb901d6ecbe517a1a7086a0d12895f97d61803e (diff) | |
| parent | d15dd81e96d0142a14287cf3f01997cd18095ab9 (diff) | |
Merge pull request #9123 from FRRouting/mergify/bp/stable/8.0/pr-8841
ospf6: Drop LSA with bad seqnumber (backport #8841)
| -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); |