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authorRenato Westphal <renato@opensourcerouting.org>2021-08-23 23:22:20 +0200
committerRenato Westphal <renato@opensourcerouting.org>2021-08-24 16:53:36 +0200
commitaea082d5788beea758113797e41ef7152470ca2f (patch)
treee01e7f18def6e5cde31126a2a624133b04c7696b /ospf6d
parenttests: enable more debugs in the ospf6_topo2 topotest (diff)
downloadfrr-aea082d5788beea758113797e41ef7152470ca2f.tar.xz
frr-aea082d5788beea758113797e41ef7152470ca2f.zip
ospf6d: further validate NSSA ASBR routes used for route computation
Add missing sanity check specified in the NSSA RFC. Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
Diffstat (limited to '')
-rw-r--r--ospf6d/ospf6_asbr.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/ospf6d/ospf6_asbr.c b/ospf6d/ospf6_asbr.c
index 92f9f0694..acecf9002 100644
--- a/ospf6d/ospf6_asbr.c
+++ b/ospf6d/ospf6_asbr.c
@@ -570,6 +570,22 @@ void ospf6_asbr_lsa_add(struct ospf6_lsa *lsa)
&asbr_id);
return;
}
+
+ /*
+ * RFC 3101 - Section 2.5:
+ * "For a Type-7 LSA the matching routing table entry must
+ * specify an intra-area path through the LSA's originating
+ * NSSA".
+ */
+ if (ntohs(lsa->header->type) == OSPF6_LSTYPE_TYPE_7
+ && (asbr_entry->path.area_id != oa->area_id
+ || asbr_entry->path.type != OSPF6_PATH_TYPE_INTRA)) {
+ if (IS_OSPF6_DEBUG_EXAMIN(AS_EXTERNAL))
+ zlog_debug(
+ "Intra-area route to NSSA ASBR not found: %pFX",
+ &asbr_id);
+ return;
+ }
}
/* Check the forwarding address */