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 along
18 * with this program; see the file COPYING; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
34 #include "ospfd/ospfd.h"
35 #include "ospfd/ospf_interface.h"
36 #include "ospfd/ospf_asbr.h"
37 #include "ospfd/ospf_lsa.h"
38 #include "ospfd/ospf_lsdb.h"
39 #include "ospfd/ospf_neighbor.h"
40 #include "ospfd/ospf_spf.h"
41 #include "ospfd/ospf_flood.h"
42 #include "ospfd/ospf_route.h"
43 #include "ospfd/ospf_zebra.h"
44 #include "ospfd/ospf_dump.h"
47 /* Remove external route. */
48 void ospf_external_route_remove(struct ospf
*ospf
, struct prefix_ipv4
*p
)
50 struct route_node
*rn
;
51 struct ospf_route
* or ;
53 rn
= route_node_lookup(ospf
->old_external_route
, (struct prefix
*)p
);
55 if ((or = rn
->info
)) {
56 zlog_info("Route[%s/%d]: external path deleted",
57 inet_ntoa(p
->prefix
), p
->prefixlen
);
59 /* Remove route from zebra. */
60 if (or->type
== OSPF_DESTINATION_NETWORK
)
61 ospf_zebra_delete(ospf
,
62 (struct prefix_ipv4
*)&rn
->p
,
68 route_unlock_node(rn
);
69 route_unlock_node(rn
);
73 zlog_info("Route[%s/%d]: no such external path", inet_ntoa(p
->prefix
),
77 /* Lookup external route. */
78 struct ospf_route
*ospf_external_route_lookup(struct ospf
*ospf
,
79 struct prefix_ipv4
*p
)
81 struct route_node
*rn
;
83 rn
= route_node_lookup(ospf
->old_external_route
, (struct prefix
*)p
);
85 route_unlock_node(rn
);
90 zlog_warn("Route[%s/%d]: lookup, no such prefix", inet_ntoa(p
->prefix
),
97 /* Add an External info for AS-external-LSA. */
98 struct external_info
*ospf_external_info_new(u_char type
, u_short instance
)
100 struct external_info
*new;
102 new = (struct external_info
*)XCALLOC(MTYPE_OSPF_EXTERNAL_INFO
,
103 sizeof(struct external_info
));
105 new->instance
= instance
;
107 ospf_reset_route_map_set_values(&new->route_map_set
);
111 static void ospf_external_info_free(struct external_info
*ei
)
113 XFREE(MTYPE_OSPF_EXTERNAL_INFO
, ei
);
116 void ospf_reset_route_map_set_values(struct route_map_set_values
*values
)
119 values
->metric_type
= -1;
122 int ospf_route_map_set_compare(struct route_map_set_values
*values1
,
123 struct route_map_set_values
*values2
)
125 return values1
->metric
== values2
->metric
126 && values1
->metric_type
== values2
->metric_type
;
129 /* Add an External info for AS-external-LSA. */
130 struct external_info
*ospf_external_info_add(struct ospf
*ospf
, u_char type
,
132 struct prefix_ipv4 p
,
134 struct in_addr nexthop
,
137 struct external_info
*new;
138 struct route_node
*rn
;
139 struct ospf_external
*ext
;
140 char inetbuf
[INET6_BUFSIZ
];
142 ext
= ospf_external_lookup(ospf
, type
, instance
);
144 ext
= ospf_external_add(ospf
, type
, instance
);
146 rn
= route_node_get(EXTERNAL_INFO(ext
), (struct prefix
*)&p
);
147 /* If old info exists, -- discard new one or overwrite with new one? */
151 if ((new->ifindex
== ifindex
)
152 && (new->nexthop
.s_addr
== nexthop
.s_addr
)
153 && (new->tag
== tag
)) {
154 route_unlock_node(rn
);
155 return NULL
; /* NULL => no LSA to refresh */
158 inet_ntop(AF_INET
, (void *)&nexthop
.s_addr
, inetbuf
,
161 "Redistribute[%s][%d][%u]: %s/%d discarding old info with NH %s.",
162 ospf_redist_string(type
), instance
,
163 ospf
->vrf_id
, inet_ntoa(p
.prefix
),
164 p
.prefixlen
, inetbuf
);
165 XFREE(MTYPE_OSPF_EXTERNAL_INFO
, rn
->info
);
169 /* Create new External info instance. */
170 new = ospf_external_info_new(type
, instance
);
172 new->ifindex
= ifindex
;
173 new->nexthop
= nexthop
;
176 /* we don't unlock rn from the get() because we're attaching the info */
180 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
181 inet_ntop(AF_INET
, (void *)&nexthop
.s_addr
, inetbuf
,
184 "Redistribute[%s][%u]: %s/%d external info created, with NH %s",
185 ospf_redist_string(type
), ospf
->vrf_id
,
186 inet_ntoa(p
.prefix
), p
.prefixlen
, inetbuf
);
191 void ospf_external_info_delete(struct ospf
*ospf
, u_char type
, u_short instance
,
192 struct prefix_ipv4 p
)
194 struct route_node
*rn
;
195 struct ospf_external
*ext
;
197 ext
= ospf_external_lookup(ospf
, type
, instance
);
201 rn
= route_node_lookup(EXTERNAL_INFO(ext
), (struct prefix
*)&p
);
203 ospf_external_info_free(rn
->info
);
205 route_unlock_node(rn
);
206 route_unlock_node(rn
);
210 struct external_info
*ospf_external_info_lookup(struct ospf
*ospf
, u_char type
,
212 struct prefix_ipv4
*p
)
214 struct route_node
*rn
;
215 struct ospf_external
*ext
;
217 ext
= ospf_external_lookup(ospf
, type
, instance
);
221 rn
= route_node_lookup(EXTERNAL_INFO(ext
), (struct prefix
*)p
);
223 route_unlock_node(rn
);
231 struct ospf_lsa
*ospf_external_info_find_lsa(struct ospf
*ospf
,
232 struct prefix_ipv4
*p
)
234 struct ospf_lsa
*lsa
;
235 struct as_external_lsa
*al
;
236 struct in_addr mask
, id
;
238 lsa
= ospf_lsdb_lookup_by_id(ospf
->lsdb
, OSPF_AS_EXTERNAL_LSA
,
239 p
->prefix
, ospf
->router_id
);
244 al
= (struct as_external_lsa
*)lsa
->data
;
246 masklen2ip(p
->prefixlen
, &mask
);
248 if (mask
.s_addr
!= al
->mask
.s_addr
) {
249 id
.s_addr
= p
->prefix
.s_addr
| (~mask
.s_addr
);
250 lsa
= ospf_lsdb_lookup_by_id(ospf
->lsdb
, OSPF_AS_EXTERNAL_LSA
,
251 id
, ospf
->router_id
);
260 /* Update ASBR status. */
261 void ospf_asbr_status_update(struct ospf
*ospf
, u_char status
)
263 zlog_info("ASBR[Status:%d]: Update", status
);
268 if (IS_OSPF_ASBR(ospf
)) {
269 zlog_info("ASBR[Status:%d]: Already ASBR", status
);
272 SET_FLAG(ospf
->flags
, OSPF_FLAG_ASBR
);
274 /* Already non ASBR. */
275 if (!IS_OSPF_ASBR(ospf
)) {
276 zlog_info("ASBR[Status:%d]: Already non ASBR", status
);
279 UNSET_FLAG(ospf
->flags
, OSPF_FLAG_ASBR
);
282 /* Transition from/to status ASBR, schedule timer. */
283 ospf_spf_calculate_schedule(ospf
, SPF_FLAG_ASBR_STATUS_CHANGE
);
284 ospf_router_lsa_update(ospf
);
287 void ospf_redistribute_withdraw(struct ospf
*ospf
, u_char type
,
290 struct route_node
*rn
;
291 struct external_info
*ei
;
292 struct ospf_external
*ext
;
294 ext
= ospf_external_lookup(ospf
, type
, instance
);
298 /* Delete external info for specified type. */
299 if (EXTERNAL_INFO(ext
))
300 for (rn
= route_top(EXTERNAL_INFO(ext
)); rn
;
303 if (ospf_external_info_find_lsa(ospf
, &ei
->p
)) {
304 if (is_prefix_default(&ei
->p
)
305 && ospf
->default_originate
306 != DEFAULT_ORIGINATE_NONE
)
308 ospf_external_lsa_flush(
310 ei
->ifindex
/*, ei->nexthop */);
312 ospf_external_info_free(ei
);
313 route_unlock_node(rn
);