commit f41b4a021659dd48d62b1a7aac4b28e3663dbdaa
author Dinesh Dutt <ddutt@cumulusnetworks.com> Sat Aug 24 08:00:37 2013 +0000
committer David Lamparter <equinox@opensourcerouting.org> Thu Nov 07 18:15:43 2013 -0800
tree ec4595f0d79279eef4da07145a30d104604b0035
parent e7ad6b20d7a7c63ed7c640ab9f61c853e77508c5

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>

ospf6d/ospf6_area.c

diff --git a/ospf6d/ospf6_area.c b/ospf6d/ospf6_area.c
index 1e07d85..37e5c00 100644
--- a/ospf6d/ospf6_area.c
+++ b/ospf6d/ospf6_area.c
@@ -164,9 +164,18 @@
   oa->summary_router->scope = oa;
 
   /* set default options */
-  OSPF6_OPT_SET (oa->options, OSPF6_OPT_V6);
+  if (CHECK_FLAG (o->flag, OSPF6_STUB_ROUTER))
+    {
+      OSPF6_OPT_CLEAR (oa->options, OSPF6_OPT_V6);
+      OSPF6_OPT_CLEAR (oa->options, OSPF6_OPT_R);
+    }
+  else
+    {
+      OSPF6_OPT_SET (oa->options, OSPF6_OPT_V6);
+      OSPF6_OPT_SET (oa->options, OSPF6_OPT_R);
+    }
+
   OSPF6_OPT_SET (oa->options, OSPF6_OPT_E);
-  OSPF6_OPT_SET (oa->options, OSPF6_OPT_R);
 
   oa->ospf6 = o;
   listnode_add_sort (o->area_list, oa);