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-rw-r--r--proto/ospf/topology.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/proto/ospf/topology.c b/proto/ospf/topology.c
index bfa071d8..5f4d1d54 100644
--- a/proto/ospf/topology.c
+++ b/proto/ospf/topology.c
@@ -258,8 +258,17 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
ln = lsab_alloc(po, sizeof(struct ospf_lsa_rt_link));
ln->type = LSART_PTP;
ln->id = neigh->rid;
- ln->data = (ifa->addr->flags & IA_PEER) ?
- ifa->iface_id : ipa_to_u32(ifa->addr->ip);
+
+ /*
+ * ln->data should be ifa->iface_id in case of no/ptp
+ * address (ifa->addr->flags & IA_PEER) on PTP link (see
+ * RFC 2328 12.4.1.1.), but the iface ID value has no use,
+ * while using IP address even in this case is here for
+ * compatibility with some broken implementations that use
+ * this address as a next-hop.
+ */
+ ln->data = ipa_to_u32(ifa->addr->ip);
+
ln->metric = ifa->cost;
ln->padding = 0;
i++;