ospfd: Add new host route command

Add static host routes into router LSA.
See RFC 2328 chapter 12.4 and Appendix C.7
Syntax:
 router ospf
   ip ospf host A.B.C.D area (A.B.C.D|<0-4294967295>|all) cost <0-65535>
   no ip ospf host A.B.C.D area (A.B.C.D|<0-4294967295>|all)

* ospfd/ospf_route.h: Add struct ospf_host_route
* ospfd/ospf_lsa.c: (router_lsa_link_set) Add host routes to Router LSA.
* ospfd/ospf_vtc.c: Impl. ip_ospf_host_cmd and no_ip_ospf_host_cmd.
  		    (ospf_config_write) Write out host routes to config.
* ospfd/ospf_ospfd.c: (ospf_new) Allocate new host route list.
  		      (ospf_finish_filnal) Free host list.
		      (ospf_area_check_free) Check if any host routes in
		      area before freeing.
* ospfd/ospf_ospfd.h: Add a host list to struct ospf.

1 files changed, 13 insertions, 1 deletions

diff --git a/ospfd/ospfd.c b/ospfd/ospfd.c
index a7553e73..b11ee1bb 100644
--- a/ospfd/ospfd.c
+++ b/ospfd/ospfd.c
@@ -231,7 +231,7 @@ ospf_new (void)
     }
   new->t_read = thread_add_read (master, ospf_read, new, new->fd);
   new->oi_write_q = list_new ();
-  
+  new->hostlist = list_new(); /* host route list */
   return new;
 }
 
@@ -401,6 +401,7 @@ ospf_finish_final (struct ospf *ospf)
   struct ospf_lsa *lsa;
   struct ospf_interface *oi;
   struct ospf_area *area;
+  struct ospf_host_route *host;
   struct ospf_vl_data *vl_data;
   struct listnode *node, *nnode;
   int i;
@@ -471,6 +472,12 @@ ospf_finish_final (struct ospf *ospf)
       ospf_area_free (area);
     }
 
+  for (ALL_LIST_ELEMENTS (ospf->hostlist, node, nnode, host))
+    {
+      listnode_delete (ospf->hostlist, host);
+      XFREE (MTYPE_OSPF_TOP, host);
+    }
+
   /* Cancel all timers. */
   OSPF_TIMER_OFF (ospf->t_external_lsa);
   OSPF_TIMER_OFF (ospf->t_router_lsa_update);
@@ -646,6 +653,8 @@ ospf_area_free (struct ospf_area *area)
 void
 ospf_area_check_free (struct ospf *ospf, struct in_addr area_id)
 {
+  struct ospf_host_route *host;
+  struct listnode *node;
   struct ospf_area *area;
 
   area = ospf_area_lookup_by_area_id (ospf, area_id);
@@ -660,6 +669,9 @@ ospf_area_check_free (struct ospf *ospf, struct in_addr area_id)
       IMPORT_NAME (area) == NULL &&
       area->auth_type == OSPF_AUTH_NULL)
     {
+      for (ALL_LIST_ELEMENTS_RO (area->ospf->hostlist, node, host))
+	if (!host->area || host->area == area)
+	  return;
       listnode_delete (ospf->areas, area);
       ospf_area_free (area);
     }