Initial revision
diff --git a/ospfd/ospf_ia.c b/ospfd/ospf_ia.c
new file mode 100644
index 0000000..32c8d86
--- /dev/null
+++ b/ospfd/ospf_ia.c
@@ -0,0 +1,726 @@
+/*
+ * OSPF inter-area routing.
+ * Copyright (C) 1999, 2000 Alex Zinin, Toshiaki Takada
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING. If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+
+#include <zebra.h>
+
+#include "thread.h"
+#include "memory.h"
+#include "hash.h"
+#include "linklist.h"
+#include "prefix.h"
+#include "table.h"
+#include "log.h"
+
+#include "ospfd/ospfd.h"
+#include "ospfd/ospf_interface.h"
+#include "ospfd/ospf_ism.h"
+#include "ospfd/ospf_asbr.h"
+#include "ospfd/ospf_lsa.h"
+#include "ospfd/ospf_lsdb.h"
+#include "ospfd/ospf_neighbor.h"
+#include "ospfd/ospf_nsm.h"
+#include "ospfd/ospf_spf.h"
+#include "ospfd/ospf_route.h"
+#include "ospfd/ospf_ase.h"
+#include "ospfd/ospf_abr.h"
+#include "ospfd/ospf_ia.h"
+#include "ospfd/ospf_dump.h"
+
+#define DEBUG
+
+struct ospf_route *
+ospf_find_abr_route (struct route_table *rtrs,
+ struct prefix_ipv4 *abr,
+ struct ospf_area *area)
+{
+ struct route_node *rn;
+ struct ospf_route *or;
+ listnode node;
+
+ if ((rn = route_node_lookup (rtrs, (struct prefix *) abr)) == NULL)
+ return NULL;
+
+ route_unlock_node (rn);
+
+ for (node = listhead ((list) rn->info); node; nextnode (node))
+ if ((or = getdata (node)) != NULL)
+ if (IPV4_ADDR_SAME (&or->u.std.area_id, &area->area_id) && (or->u.std.flags & ROUTER_LSA_BORDER))
+ return or;
+
+ return NULL;
+}
+
+void
+ospf_ia_network_route (struct route_table *rt, struct prefix_ipv4 *p,
+ struct ospf_route *new_or, struct ospf_route *abr_or)
+{
+ struct route_node *rn1;
+ struct ospf_route *or;
+
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_network_route(): processing summary route to %s/%d",
+ inet_ntoa (p->prefix), p->prefixlen);
+
+ /* Find a route to the same dest */
+ if ((rn1 = route_node_lookup (rt, (struct prefix *) p)))
+ {
+ int res;
+
+ route_unlock_node (rn1);
+
+ if ((or = rn1->info))
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_network_route(): "
+ "Found a route to the same network");
+ /* Check the existing route. */
+ if ((res = ospf_route_cmp (new_or, or)) < 0)
+ {
+ /* New route is better, so replace old one. */
+ ospf_route_subst (rn1, new_or, abr_or);
+ }
+ else if (res == 0)
+ {
+ /* New and old route are equal, so next hops can be added. */
+ route_lock_node (rn1);
+ ospf_route_copy_nexthops (or, abr_or->path);
+ route_unlock_node (rn1);
+
+ /* new route can be deleted, because existing route has been updated. */
+ ospf_route_free (new_or);
+ }
+ else
+ {
+ /* New route is worse, so free it. */
+ ospf_route_free (new_or);
+ return;
+ }
+ } /* if (or)*/
+ } /*if (rn1)*/
+ else
+ { /* no route */
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_network_route(): add new route to %s/%d",
+ inet_ntoa (p->prefix), p->prefixlen);
+ ospf_route_add (rt, p, new_or, abr_or);
+ }
+}
+
+void
+ospf_ia_router_route (struct route_table *rt, struct prefix_ipv4 *p,
+ struct ospf_route *new_or, struct ospf_route *abr_or)
+{
+ struct route_node *rn;
+ struct ospf_route *or = NULL;
+ int ret;
+
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_router_route(): considering %s/%d",
+ inet_ntoa (p->prefix), p->prefixlen);
+ /* Find a route to the same dest */
+ rn = route_node_get (rt,(struct prefix *) p);
+
+ if (rn->info == NULL)
+ /* This is a new route */
+ rn->info = list_new ();
+ else
+ {
+ struct ospf_area *or_area;
+ or_area = ospf_area_lookup_by_area_id (new_or->u.std.area_id);
+ assert (or_area);
+ /* This is an additional route */
+ route_unlock_node (rn);
+ or = ospf_find_asbr_route_through_area (rt, p, or_area);
+ }
+
+ if (or)
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_router_route(): "
+ "a route to the same ABR through the same area exists");
+ /* New route is better */
+ if ((ret = ospf_route_cmp (new_or, or)) < 0)
+ {
+ listnode_delete (rn->info, or);
+ ospf_route_free (or);
+ /* proceed down */
+ }
+ /* Routes are the same */
+ else if (ret == 0)
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_router_route(): merging the new route");
+
+ ospf_route_copy_nexthops (or, abr_or->path);
+ ospf_route_free (new_or);
+ return;
+ }
+ /* New route is worse */
+ else
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_router_route(): skipping the new route");
+ ospf_route_free (new_or);
+ return;
+ }
+ }
+
+ ospf_route_copy_nexthops (new_or, abr_or->path);
+
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_router_route(): adding the new route");
+
+ listnode_add (rn->info, new_or);
+}
+
+
+struct ia_args
+{
+ struct route_table *rt;
+ struct route_table *rtrs;
+ struct ospf_area *area;
+};
+
+int
+process_summary_lsa (struct ospf_lsa *l, void *v, int i)
+{
+ struct ospf_area_range *range;
+ struct ospf_route *abr_or, *new_or;
+ struct summary_lsa *sl;
+ struct prefix_ipv4 p, abr;
+ u_int32_t metric;
+ struct ia_args *args;
+
+ if (l == NULL)
+ return 0;
+
+ args = (struct ia_args *) v;
+ sl = (struct summary_lsa *) l->data;
+
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("process_summary_lsa(): LS ID: %s", inet_ntoa (sl->header.id));
+
+ metric = GET_METRIC (sl->metric);
+
+ if (metric == OSPF_LS_INFINITY)
+ return 0;
+
+ if (IS_LSA_MAXAGE (l))
+ return 0;
+
+ if (ospf_lsa_is_self_originated (l))
+ return 0;
+
+ p.family = AF_INET;
+ p.prefix = sl->header.id;
+
+ if (sl->header.type == OSPF_SUMMARY_LSA)
+ p.prefixlen = ip_masklen (sl->mask);
+ else
+ p.prefixlen = IPV4_MAX_BITLEN;
+
+ apply_mask_ipv4 (&p);
+
+ if (sl->header.type == OSPF_SUMMARY_LSA &&
+ (range = ospf_area_range_match_any (ospf_top, &p)) &&
+ ospf_area_range_active (range))
+ return 0;
+
+ if (ospf_top->abr_type != OSPF_ABR_STAND &&
+ args->area->external_routing != OSPF_AREA_DEFAULT &&
+ p.prefix.s_addr == OSPF_DEFAULT_DESTINATION &&
+ p.prefixlen == 0)
+ return 0; /* Ignore summary default from a stub area */
+
+ abr.family = AF_INET;
+ abr.prefix = sl->header.adv_router;
+ abr.prefixlen = IPV4_MAX_BITLEN;
+ apply_mask_ipv4 (&abr);
+
+ abr_or = ospf_find_abr_route (args->rtrs, &abr, args->area);
+
+ if (abr_or == NULL)
+ return 0;
+
+ new_or = ospf_route_new ();
+ new_or->type = OSPF_DESTINATION_NETWORK;
+ new_or->id = sl->header.id;
+ new_or->mask = sl->mask;
+ new_or->u.std.options = sl->header.options;
+ new_or->u.std.origin = (struct lsa_header *) sl;
+ new_or->cost = abr_or->cost + metric;
+ new_or->u.std.area_id = args->area->area_id;
+#ifdef HAVE_NSSA
+ new_or->u.std.external_routing = args->area->external_routing;
+#endif /* HAVE_NSSA */
+ new_or->path_type = OSPF_PATH_INTER_AREA;
+
+ if (sl->header.type == OSPF_SUMMARY_LSA)
+ ospf_ia_network_route (args->rt, &p, new_or, abr_or);
+ else
+ {
+ new_or->type = OSPF_DESTINATION_ROUTER;
+ new_or->u.std.flags = ROUTER_LSA_EXTERNAL;
+ ospf_ia_router_route (args->rtrs, &p, new_or, abr_or);
+ }
+
+ return 0;
+}
+
+void
+ospf_examine_summaries (struct ospf_area * area,
+ struct route_table *lsdb_rt,
+ struct route_table *rt,
+ struct route_table *rtrs)
+{
+ struct ia_args args = {rt, rtrs, area};
+ foreach_lsa (lsdb_rt, &args, 0, process_summary_lsa);
+}
+
+int
+ospf_area_is_transit (struct ospf_area *area)
+{
+ return (area->transit == OSPF_TRANSIT_TRUE) ||
+ ospf_full_virtual_nbrs(area); /* Cisco forgets to set the V-bit :( */
+}
+
+void
+ospf_update_network_route (struct route_table *rt,
+ struct route_table *rtrs,
+ struct summary_lsa *lsa,
+ struct prefix_ipv4 *p,
+ struct ospf_area *area)
+{
+ struct route_node *rn;
+ struct ospf_route *or, *abr_or, *new_or;
+ struct prefix_ipv4 abr;
+ u_int32_t cost;
+
+ abr.family = AF_INET;
+ abr.prefix =lsa->header.adv_router;
+ abr.prefixlen = IPV4_MAX_BITLEN;
+ apply_mask_ipv4 (&abr);
+
+ abr_or = ospf_find_abr_route (rtrs, &abr, area);
+
+ if (abr_or == NULL)
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_update_network_route(): can't find a route to the ABR");
+ return;
+ }
+
+ cost = abr_or->cost + GET_METRIC (lsa->metric);
+
+ rn = route_node_lookup (rt, (struct prefix *) p);
+
+ if (! rn)
+ {
+ if (ospf_top->abr_type != OSPF_ABR_SHORTCUT)
+ return; /* Standard ABR can update only already installed
+ backbone paths */
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_update_network_route(): "
+ "Allowing Shortcut ABR to add new route");
+ new_or = ospf_route_new ();
+ new_or->type = OSPF_DESTINATION_NETWORK;
+ new_or->id = lsa->header.id;
+ new_or->mask = lsa->mask;
+ new_or->u.std.options = lsa->header.options;
+ new_or->u.std.origin = (struct lsa_header *) lsa;
+ new_or->cost = cost;
+ new_or->u.std.area_id = area->area_id;
+#ifdef HAVE_NSSA
+ new_or->u.std.external_routing = area->external_routing;
+#endif /* HAVE_NSSA */
+ new_or->path_type = OSPF_PATH_INTER_AREA;
+ ospf_route_add (rt, p, new_or, abr_or);
+
+ return;
+ }
+ else
+ {
+ route_unlock_node (rn);
+ if (rn->info == NULL)
+ return;
+ }
+
+ or = rn->info;
+
+ if (or->path_type != OSPF_PATH_INTRA_AREA &&
+ or->path_type != OSPF_PATH_INTER_AREA)
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_update_network_route(): ERR: path type is wrong");
+ return;
+ }
+
+ if (ospf_top->abr_type == OSPF_ABR_SHORTCUT)
+ {
+ if (or->path_type == OSPF_PATH_INTRA_AREA &&
+ !OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id))
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_update_network_route(): Shortcut: "
+ "this intra-area path is not backbone");
+ return;
+ }
+ }
+ else /* Not Shortcut ABR */
+ {
+ if (!OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id))
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_update_network_route(): "
+ "route is not BB-associated");
+ return; /* We can update only BB routes */
+ }
+ }
+
+ if (or->cost < cost)
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_update_network_route(): new route is worse");
+ return;
+ }
+
+ if (or->cost == cost)
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_update_network_route(): "
+ "new route is same distance, adding nexthops");
+ ospf_route_copy_nexthops (or, abr_or->path);
+ }
+
+ if (or->cost > cost)
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_update_network_route(): "
+ "new route is better, overriding nexthops");
+ ospf_route_subst_nexthops (or, abr_or->path);
+ or->cost = cost;
+
+ if ((ospf_top->abr_type == OSPF_ABR_SHORTCUT) &&
+ !OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id))
+ {
+ or->path_type = OSPF_PATH_INTER_AREA;
+ or->u.std.area_id = area->area_id;
+#ifdef HAVE_NSSA
+ or->u.std.external_routing = area->external_routing;
+#endif /* HAVE_NSSA */
+ /* Note that we can do this only in Shortcut ABR mode,
+ because standard ABR must leave the route type and area
+ unchanged
+ */
+ }
+ }
+}
+
+void
+ospf_update_router_route (struct route_table *rtrs,
+ struct summary_lsa *lsa,
+ struct prefix_ipv4 *p,
+ struct ospf_area *area)
+{
+ struct ospf_route *or, *abr_or, *new_or;
+ struct prefix_ipv4 abr;
+ u_int32_t cost;
+
+ abr.family = AF_INET;
+ abr.prefix = lsa->header.adv_router;
+ abr.prefixlen = IPV4_MAX_BITLEN;
+ apply_mask_ipv4 (&abr);
+
+ abr_or = ospf_find_abr_route (rtrs, &abr, area);
+
+ if (abr_or == NULL)
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_update_router_route(): can't find a route to the ABR");
+ return;
+ }
+
+ cost = abr_or->cost + GET_METRIC (lsa->metric);
+
+ /* First try to find a backbone path,
+ because standard ABR can update only BB-associated paths */
+
+ if ((ospf_top->backbone == NULL) &&
+ (ospf_top->abr_type != OSPF_ABR_SHORTCUT))
+
+ /* no BB area, not Shortcut ABR, exiting */
+ return;
+
+ or = ospf_find_asbr_route_through_area (rtrs, p, ospf_top->backbone);
+
+ if (or == NULL)
+ {
+ if (ospf_top->abr_type != OSPF_ABR_SHORTCUT)
+
+ /* route to ASBR through the BB not found
+ the router is not Shortcut ABR, exiting */
+
+ return;
+ else
+ /* We're a Shortcut ABR*/
+ {
+ /* Let it either add a new router or update the route
+ through the same (non-BB) area. */
+
+ new_or = ospf_route_new ();
+ new_or->type = OSPF_DESTINATION_ROUTER;
+ new_or->id = lsa->header.id;
+ new_or->mask = lsa->mask;
+ new_or->u.std.options = lsa->header.options;
+ new_or->u.std.origin = (struct lsa_header *)lsa;
+ new_or->cost = cost;
+ new_or->u.std.area_id = area->area_id;
+#ifdef HAVE_NSSA
+ new_or->u.std.external_routing = area->external_routing;
+#endif /* HAVE_NSSA */
+ new_or->path_type = OSPF_PATH_INTER_AREA;
+ new_or->u.std.flags = ROUTER_LSA_EXTERNAL;
+ ospf_ia_router_route (rtrs, p, new_or, abr_or);
+
+ return;
+ }
+ }
+
+ /* At this point the "or" is always bb-associated */
+
+ if (!(or->u.std.flags & ROUTER_LSA_EXTERNAL))
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_upd_router_route(): the remote router is not an ASBR");
+ return;
+ }
+
+ if (or->path_type != OSPF_PATH_INTRA_AREA &&
+ or->path_type != OSPF_PATH_INTER_AREA)
+ return;
+
+ if (or->cost < cost)
+ return;
+
+ else if (or->cost == cost)
+ ospf_route_copy_nexthops (or, abr_or->path);
+
+ else if (or->cost > cost)
+ {
+ ospf_route_subst_nexthops (or, abr_or->path);
+ or->cost = cost;
+
+ /* Even if the ABR runs in Shortcut mode, we can't change
+ the path type and area, because the "or" is always bb-associated
+ at this point and even Shortcut ABR can't change these attributes */
+ }
+}
+
+int
+process_transit_summary_lsa (struct ospf_lsa *l, void *v, int i)
+{
+ struct summary_lsa *sl;
+ struct prefix_ipv4 p;
+ u_int32_t metric;
+ struct ia_args *args;
+
+ if (l == NULL)
+ return 0;
+
+ args = (struct ia_args *) v;
+ sl = (struct summary_lsa *) l->data;
+
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("process_transit_summaries(): LS ID: %s",
+ inet_ntoa (l->data->id));
+ metric = GET_METRIC (sl->metric);
+
+ if (metric == OSPF_LS_INFINITY)
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("process_transit_summaries(): metric is infinity, skip");
+ return 0;
+ }
+
+ if (IS_LSA_MAXAGE (l))
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("process_transit_summaries(): This LSA is too old");
+ return 0;
+ }
+
+ if (ospf_lsa_is_self_originated (l))
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("process_transit_summaries(): This LSA is mine, skip");
+ return 0;
+ }
+
+ p.family = AF_INET;
+ p.prefix = sl->header.id;
+
+ if (sl->header.type == OSPF_SUMMARY_LSA)
+ p.prefixlen = ip_masklen (sl->mask);
+ else
+ p.prefixlen = IPV4_MAX_BITLEN;
+
+ apply_mask_ipv4 (&p);
+
+ if (sl->header.type == OSPF_SUMMARY_LSA)
+ ospf_update_network_route (args->rt, args->rtrs, sl, &p, args->area);
+ else
+ ospf_update_router_route (args->rtrs, sl, &p, args->area);
+
+ return 0;
+}
+
+void
+ospf_examine_transit_summaries (struct ospf_area *area,
+ /* struct ospf_lsdb *lsdb, */
+ struct route_table *lsdb_rt,
+ struct route_table *rt,
+ struct route_table *rtrs)
+{
+ struct ia_args args = {rt, rtrs, area};
+
+ /* ospf_lsdb_iterator (lsdb, &args, 0, process_transit_summary_lsa); */
+ foreach_lsa (lsdb_rt, &args, 0, process_transit_summary_lsa);
+}
+
+void
+ospf_ia_routing (struct route_table *rt,
+ struct route_table *rtrs)
+{
+ struct ospf_area * area;
+
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_routing():start");
+
+ if (OSPF_IS_ABR)
+ {
+ listnode node;
+ struct ospf_area *area;
+
+ switch (ospf_top->abr_type)
+ {
+ case OSPF_ABR_STAND:
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_routing():Standard ABR");
+
+ if ((area = ospf_top->backbone))
+ {
+ listnode node;
+
+ if (IS_DEBUG_OSPF_EVENT)
+ {
+ zlog_info ("ospf_ia_routing():backbone area found");
+ zlog_info ("ospf_ia_routing():examining summaries");
+ }
+
+ OSPF_EXAMINE_SUMMARIES_ALL (area, rt, rtrs);
+
+ for (node = listhead (ospf_top->areas); node; nextnode (node))
+ if ((area = getdata (node)) != NULL)
+ if (area != ospf_top->backbone)
+ if (ospf_area_is_transit (area))
+ OSPF_EXAMINE_TRANSIT_SUMMARIES_ALL (area, rt, rtrs);
+ }
+ else
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_routing():backbone area NOT found");
+ break;
+ case OSPF_ABR_IBM:
+ case OSPF_ABR_CISCO:
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_routing():Alternative Cisco/IBM ABR");
+ area = ospf_top->backbone; /* Find the BB */
+
+ /* If we have an active BB connection */
+ if (area && ospf_act_bb_connection ())
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ {
+ zlog_info ("ospf_ia_routing(): backbone area found");
+ zlog_info ("ospf_ia_routing(): examining BB summaries");
+ }
+
+ OSPF_EXAMINE_SUMMARIES_ALL (area, rt, rtrs);
+
+ for (node = listhead (ospf_top->areas); node; nextnode (node))
+ if ((area = getdata (node)) != NULL)
+ if (area != ospf_top->backbone)
+ if (ospf_area_is_transit (area))
+ OSPF_EXAMINE_TRANSIT_SUMMARIES_ALL (area, rt, rtrs);
+ }
+ else
+ { /* No active BB connection--consider all areas */
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_routing(): "
+ "Active BB connection not found");
+ for (node = listhead (ospf_top->areas); node; nextnode (node))
+ if ((area = getdata (node)) != NULL)
+ OSPF_EXAMINE_SUMMARIES_ALL (area, rt, rtrs);
+ }
+ break;
+ case OSPF_ABR_SHORTCUT:
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_routing():Alternative Shortcut");
+ area = ospf_top->backbone; /* Find the BB */
+
+ /* If we have an active BB connection */
+ if (area && ospf_act_bb_connection ())
+ {
+ if (IS_DEBUG_OSPF_EVENT)
+ {
+ zlog_info ("ospf_ia_routing(): backbone area found");
+ zlog_info ("ospf_ia_routing(): examining BB summaries");
+ }
+ OSPF_EXAMINE_SUMMARIES_ALL (area, rt, rtrs);
+ }
+
+ for (node = listhead (ospf_top->areas); node; nextnode (node))
+ if ((area = getdata (node)) != NULL)
+ if (area != ospf_top->backbone)
+ if (ospf_area_is_transit (area) ||
+ ((area->shortcut_configured != OSPF_SHORTCUT_DISABLE) &&
+ ((ospf_top->backbone == NULL) ||
+ ((area->shortcut_configured == OSPF_SHORTCUT_ENABLE) &&
+ area->shortcut_capability))))
+ OSPF_EXAMINE_TRANSIT_SUMMARIES_ALL (area, rt, rtrs);
+ break;
+ default:
+ break;
+ }
+ }
+ else
+ {
+ listnode node;
+
+ if (IS_DEBUG_OSPF_EVENT)
+ zlog_info ("ospf_ia_routing():not ABR, considering all areas");
+
+ for (node = listhead (ospf_top->areas); node; nextnode (node))
+ if ((area = getdata (node)) != NULL)
+ OSPF_EXAMINE_SUMMARIES_ALL (area, rt, rtrs);
+ }
+}