[ospf6d] Fix ospf6d crash if range defined twice

ospf6d will crash if the same range is defined twice.
There was no check if the same range had previously been defined,
thereby causing a later assert to fail.

diff --git a/ospf6d/ospf6_area.c b/ospf6d/ospf6_area.c
index 3bfc0cae5f784c89b95c5005b8181b3d995d1d98..3c999bbcc9824e924e351693ab5ba9c67de15a3f 100644 (file)
--- a/ospf6d/ospf6_area.c
+++ b/ospf6d/ospf6_area.c
@@ -353,6 +353,12 @@ DEFUN (area_range,
         UNSET_FLAG (range->flag, OSPF6_ROUTE_DO_NOT_ADVERTISE);
     }
 
+  if (range->rnode)
+    {
+      vty_out (vty, "Range already defined: %s%s", argv[-1], VNL);
+      return CMD_WARNING;
+    }
+
   ospf6_route_add (range, oa->range_table);
   return CMD_SUCCESS;
 }