ospf6d: add overload support
OSPFv3: Support setting/clearing overload bit on router
It is sometimes necessary for a router to gracefully remove itself from
the SPF tree i.e. it cannot act as a transit router. It does this by
setting the overload bit in the router LSA. This patch adds support for
enabling/disabling the overload bit.
Signed-off-by: Dinesh G Dutt <ddutt at cumulusnetworks.com>
Reviewed-by: Pradosh Mohapatra <pmohapat at cumulusnetworks.com>
[DL: patch applied with fuzz]
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
diff --git a/ospf6d/ospf6_intra.c b/ospf6d/ospf6_intra.c
index c08a6ae..025a771 100644
--- a/ospf6d/ospf6_intra.c
+++ b/ospf6d/ospf6_intra.c
@@ -105,6 +105,29 @@
}
int
+ospf6_router_is_stub_router (struct ospf6_lsa *lsa)
+{
+ struct ospf6_router_lsa *rtr_lsa;
+
+ if (lsa != NULL && OSPF6_LSA_IS_TYPE (ROUTER, lsa))
+ {
+ rtr_lsa = (struct ospf6_router_lsa *)
+ ((caddr_t) lsa->header + sizeof (struct ospf6_lsa_header));
+
+ if (!OSPF6_OPT_ISSET (rtr_lsa->options, OSPF6_OPT_R))
+ {
+ return (OSPF6_IS_STUB_ROUTER);
+ }
+ else if (!OSPF6_OPT_ISSET (rtr_lsa->options, OSPF6_OPT_V6))
+ {
+ return (OSPF6_IS_STUB_ROUTER_V6);
+ }
+ }
+
+ return (OSPF6_NOT_STUB_ROUTER);
+}
+
+int
ospf6_router_lsa_originate (struct thread *thread)
{
struct ospf6_area *oa;