2 * OSPF AS Boundary Router functions.
3 * Copyright (C) 1999, 2000 Kunihiro Ishiguro, Toshiaki Takada
5 * This file is part of GNU Zebra.
7 * GNU Zebra is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Zebra; see the file COPYING. If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
35 #include "ospfd/ospfd.h"
36 #include "ospfd/ospf_interface.h"
37 #include "ospfd/ospf_asbr.h"
38 #include "ospfd/ospf_lsa.h"
39 #include "ospfd/ospf_lsdb.h"
40 #include "ospfd/ospf_neighbor.h"
41 #include "ospfd/ospf_spf.h"
42 #include "ospfd/ospf_flood.h"
43 #include "ospfd/ospf_route.h"
44 #include "ospfd/ospf_zebra.h"
45 #include "ospfd/ospf_dump.h"
48 /* Remove external route. */
50 ospf_external_route_remove (struct ospf *ospf, struct prefix_ipv4 *p)
52 struct route_node *rn;
53 struct ospf_route *or;
55 rn = route_node_lookup (ospf->old_external_route, (struct prefix *) p);
59 zlog_info ("Route[%s/%d]: external path deleted",
60 inet_ntoa (p->prefix), p->prefixlen);
62 /* Remove route from zebra. */
63 if (or->type == OSPF_DESTINATION_NETWORK)
64 ospf_zebra_delete ((struct prefix_ipv4 *) &rn->p, or);
69 route_unlock_node (rn);
70 route_unlock_node (rn);
74 zlog_info ("Route[%s/%d]: no such external path",
75 inet_ntoa (p->prefix), p->prefixlen);
78 /* Lookup external route. */
80 ospf_external_route_lookup (struct ospf *ospf,
81 struct prefix_ipv4 *p)
83 struct route_node *rn;
85 rn = route_node_lookup (ospf->old_external_route, (struct prefix *) p);
88 route_unlock_node (rn);
93 zlog_warn ("Route[%s/%d]: lookup, no such prefix",
94 inet_ntoa (p->prefix), p->prefixlen);
100 /* Add an External info for AS-external-LSA. */
101 struct external_info *
102 ospf_external_info_new (u_char type)
104 struct external_info *new;
106 new = (struct external_info *)
107 XCALLOC (MTYPE_OSPF_EXTERNAL_INFO, sizeof (struct external_info));
110 ospf_reset_route_map_set_values (&new->route_map_set);
115 ospf_external_info_free (struct external_info *ei)
117 XFREE (MTYPE_OSPF_EXTERNAL_INFO, ei);
121 ospf_reset_route_map_set_values (struct route_map_set_values *values)
124 values->metric_type = -1;
128 ospf_route_map_set_compare (struct route_map_set_values *values1,
129 struct route_map_set_values *values2)
131 return values1->metric == values2->metric &&
132 values1->metric_type == values2->metric_type;
135 /* Add an External info for AS-external-LSA. */
136 struct external_info *
137 ospf_external_info_add (u_char type, struct prefix_ipv4 p,
138 ifindex_t ifindex, struct in_addr nexthop,
141 struct external_info *new;
142 struct route_node *rn;
144 /* Initialize route table. */
145 if (EXTERNAL_INFO (type) == NULL)
146 EXTERNAL_INFO (type) = route_table_init ();
148 rn = route_node_get (EXTERNAL_INFO (type), (struct prefix *) &p);
149 /* If old info exists, -- discard new one or overwrite with new one? */
153 route_unlock_node (rn);
154 zlog_warn ("Redistribute[%s]: %s/%d already exists, discard.",
155 ospf_redist_string(type),
156 inet_ntoa (p.prefix), p.prefixlen);
157 /* XFREE (MTYPE_OSPF_TMP, rn->info); */
161 /* Create new External info instance. */
162 new = ospf_external_info_new (type);
164 new->ifindex = ifindex;
165 new->nexthop = nexthop;
171 if (IS_DEBUG_OSPF (lsa, LSA_GENERATE))
172 zlog_debug ("Redistribute[%s]: %s/%d external info created.",
173 ospf_redist_string(type),
174 inet_ntoa (p.prefix), p.prefixlen);
179 ospf_external_info_delete (u_char type, struct prefix_ipv4 p)
181 struct route_node *rn;
183 rn = route_node_lookup (EXTERNAL_INFO (type), (struct prefix *) &p);
186 ospf_external_info_free (rn->info);
188 route_unlock_node (rn);
189 route_unlock_node (rn);
193 struct external_info *
194 ospf_external_info_lookup (u_char type, struct prefix_ipv4 *p)
196 struct route_node *rn;
197 rn = route_node_lookup (EXTERNAL_INFO (type), (struct prefix *) p);
200 route_unlock_node (rn);
209 ospf_external_info_find_lsa (struct ospf *ospf,
210 struct prefix_ipv4 *p)
212 struct ospf_lsa *lsa;
213 struct as_external_lsa *al;
214 struct in_addr mask, id;
216 lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, OSPF_AS_EXTERNAL_LSA,
217 p->prefix, ospf->router_id);
222 al = (struct as_external_lsa *) lsa->data;
224 masklen2ip (p->prefixlen, &mask);
226 if (mask.s_addr != al->mask.s_addr)
228 id.s_addr = p->prefix.s_addr | (~mask.s_addr);
229 lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, OSPF_AS_EXTERNAL_LSA,
230 id, ospf->router_id);
239 /* Update ASBR status. */
241 ospf_asbr_status_update (struct ospf *ospf, u_char status)
243 zlog_info ("ASBR[Status:%d]: Update", status);
249 if (IS_OSPF_ASBR (ospf))
251 zlog_info ("ASBR[Status:%d]: Already ASBR", status);
254 SET_FLAG (ospf->flags, OSPF_FLAG_ASBR);
258 /* Already non ASBR. */
259 if (! IS_OSPF_ASBR (ospf))
261 zlog_info ("ASBR[Status:%d]: Already non ASBR", status);
264 UNSET_FLAG (ospf->flags, OSPF_FLAG_ASBR);
267 /* Transition from/to status ASBR, schedule timer. */
268 ospf_spf_calculate_schedule (ospf, SPF_FLAG_ASBR_STATUS_CHANGE);
269 ospf_router_lsa_update (ospf);
273 ospf_redistribute_withdraw (struct ospf *ospf, u_char type)
275 struct route_node *rn;
276 struct external_info *ei;
278 /* Delete external info for specified type. */
279 if (EXTERNAL_INFO (type))
280 for (rn = route_top (EXTERNAL_INFO (type)); rn; rn = route_next (rn))
282 if (ospf_external_info_find_lsa (ospf, &ei->p))
284 if (is_prefix_default (&ei->p) &&
285 ospf->default_originate != DEFAULT_ORIGINATE_NONE)
287 ospf_external_lsa_flush (ospf, type, &ei->p,
288 ei->ifindex /*, ei->nexthop */);
290 ospf_external_info_free (ei);
291 route_unlock_node (rn);