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718e3744 | 1 | /* |
2 | * OSPF AS Boundary Router functions. | |
3 | * Copyright (C) 1999, 2000 Kunihiro Ishiguro, Toshiaki Takada | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
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 | |
10 | * later version. | |
11 | * | |
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. | |
16 | * | |
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 | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "thread.h" | |
26 | #include "memory.h" | |
27 | #include "linklist.h" | |
28 | #include "prefix.h" | |
29 | #include "if.h" | |
30 | #include "table.h" | |
31 | #include "vty.h" | |
32 | #include "filter.h" | |
33 | #include "log.h" | |
34 | ||
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" | |
e84cc647 | 46 | |
718e3744 | 47 | \f |
48 | /* Remove external route. */ | |
49 | void | |
e84cc647 | 50 | ospf_external_route_remove (struct ospf *ospf, struct prefix_ipv4 *p) |
718e3744 | 51 | { |
52 | struct route_node *rn; | |
53 | struct ospf_route *or; | |
54 | ||
e84cc647 | 55 | rn = route_node_lookup (ospf->old_external_route, (struct prefix *) p); |
718e3744 | 56 | if (rn) |
57 | if ((or = rn->info)) | |
58 | { | |
59 | zlog_info ("Route[%s/%d]: external path deleted", | |
60 | inet_ntoa (p->prefix), p->prefixlen); | |
61 | ||
62 | /* Remove route from zebra. */ | |
63 | if (or->type == OSPF_DESTINATION_NETWORK) | |
64 | ospf_zebra_delete ((struct prefix_ipv4 *) &rn->p, or); | |
65 | ||
66 | ospf_route_free (or); | |
67 | rn->info = NULL; | |
68 | ||
69 | route_unlock_node (rn); | |
70 | route_unlock_node (rn); | |
71 | return; | |
72 | } | |
73 | ||
74 | zlog_info ("Route[%s/%d]: no such external path", | |
75 | inet_ntoa (p->prefix), p->prefixlen); | |
76 | } | |
77 | ||
78 | /* Lookup external route. */ | |
79 | struct ospf_route * | |
e84cc647 | 80 | ospf_external_route_lookup (struct ospf *ospf, |
81 | struct prefix_ipv4 *p) | |
718e3744 | 82 | { |
83 | struct route_node *rn; | |
84 | ||
e84cc647 | 85 | rn = route_node_lookup (ospf->old_external_route, (struct prefix *) p); |
718e3744 | 86 | if (rn) |
87 | { | |
88 | route_unlock_node (rn); | |
89 | if (rn->info) | |
90 | return rn->info; | |
91 | } | |
92 | ||
93 | zlog_warn ("Route[%s/%d]: lookup, no such prefix", | |
94 | inet_ntoa (p->prefix), p->prefixlen); | |
95 | ||
96 | return NULL; | |
97 | } | |
98 | ||
99 | \f | |
100 | /* Add an External info for AS-external-LSA. */ | |
101 | struct external_info * | |
102 | ospf_external_info_new (u_char type) | |
103 | { | |
104 | struct external_info *new; | |
105 | ||
106 | new = (struct external_info *) | |
107 | XMALLOC (MTYPE_OSPF_EXTERNAL_INFO, sizeof (struct external_info)); | |
108 | memset (new, 0, sizeof (struct external_info)); | |
109 | new->type = type; | |
110 | ||
111 | ospf_reset_route_map_set_values (&new->route_map_set); | |
112 | return new; | |
113 | } | |
114 | ||
4dadc291 | 115 | static void |
718e3744 | 116 | ospf_external_info_free (struct external_info *ei) |
117 | { | |
118 | XFREE (MTYPE_OSPF_EXTERNAL_INFO, ei); | |
119 | } | |
120 | ||
121 | void | |
122 | ospf_reset_route_map_set_values (struct route_map_set_values *values) | |
123 | { | |
124 | values->metric = -1; | |
125 | values->metric_type = -1; | |
126 | } | |
127 | ||
128 | int | |
129 | ospf_route_map_set_compare (struct route_map_set_values *values1, | |
130 | struct route_map_set_values *values2) | |
131 | { | |
132 | return values1->metric == values2->metric && | |
133 | values1->metric_type == values2->metric_type; | |
134 | } | |
135 | ||
136 | /* Add an External info for AS-external-LSA. */ | |
137 | struct external_info * | |
138 | ospf_external_info_add (u_char type, struct prefix_ipv4 p, | |
139 | unsigned int ifindex, struct in_addr nexthop) | |
140 | { | |
141 | struct external_info *new; | |
142 | struct route_node *rn; | |
143 | ||
144 | /* Initialize route table. */ | |
145 | if (EXTERNAL_INFO (type) == NULL) | |
146 | EXTERNAL_INFO (type) = route_table_init (); | |
147 | ||
148 | rn = route_node_get (EXTERNAL_INFO (type), (struct prefix *) &p); | |
149 | /* If old info exists, -- discard new one or overwrite with new one? */ | |
150 | if (rn) | |
151 | if (rn->info) | |
152 | { | |
153 | route_unlock_node (rn); | |
154 | zlog_warn ("Redistribute[%s]: %s/%d already exists, discard.", | |
f52d13cb | 155 | ospf_redist_string(type), |
718e3744 | 156 | inet_ntoa (p.prefix), p.prefixlen); |
157 | /* XFREE (MTYPE_OSPF_TMP, rn->info); */ | |
158 | return rn->info; | |
159 | } | |
160 | ||
161 | /* Create new External info instance. */ | |
162 | new = ospf_external_info_new (type); | |
163 | new->p = p; | |
164 | new->ifindex = ifindex; | |
165 | new->nexthop = nexthop; | |
166 | new->tag = 0; | |
167 | ||
168 | rn->info = new; | |
169 | ||
170 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e84cc647 | 171 | zlog_debug ("Redistribute[%s]: %s/%d external info created.", |
f52d13cb | 172 | ospf_redist_string(type), |
718e3744 | 173 | inet_ntoa (p.prefix), p.prefixlen); |
174 | return new; | |
175 | } | |
176 | ||
177 | void | |
178 | ospf_external_info_delete (u_char type, struct prefix_ipv4 p) | |
179 | { | |
180 | struct route_node *rn; | |
181 | ||
182 | rn = route_node_lookup (EXTERNAL_INFO (type), (struct prefix *) &p); | |
183 | if (rn) | |
184 | { | |
185 | ospf_external_info_free (rn->info); | |
186 | rn->info = NULL; | |
187 | route_unlock_node (rn); | |
188 | route_unlock_node (rn); | |
189 | } | |
190 | } | |
191 | ||
192 | struct external_info * | |
193 | ospf_external_info_lookup (u_char type, struct prefix_ipv4 *p) | |
194 | { | |
195 | struct route_node *rn; | |
196 | rn = route_node_lookup (EXTERNAL_INFO (type), (struct prefix *) p); | |
197 | if (rn) | |
198 | { | |
199 | route_unlock_node (rn); | |
200 | if (rn->info) | |
201 | return rn->info; | |
202 | } | |
203 | ||
204 | return NULL; | |
205 | } | |
206 | ||
207 | struct ospf_lsa * | |
e84cc647 | 208 | ospf_external_info_find_lsa (struct ospf *ospf, |
209 | struct prefix_ipv4 *p) | |
718e3744 | 210 | { |
211 | struct ospf_lsa *lsa; | |
212 | struct as_external_lsa *al; | |
213 | struct in_addr mask, id; | |
214 | ||
e84cc647 | 215 | lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, OSPF_AS_EXTERNAL_LSA, |
216 | p->prefix, ospf->router_id); | |
718e3744 | 217 | |
218 | if (!lsa) | |
219 | return NULL; | |
220 | ||
221 | al = (struct as_external_lsa *) lsa->data; | |
222 | ||
223 | masklen2ip (p->prefixlen, &mask); | |
224 | ||
225 | if (mask.s_addr != al->mask.s_addr) | |
226 | { | |
227 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
e84cc647 | 228 | lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, OSPF_AS_EXTERNAL_LSA, |
229 | id, ospf->router_id); | |
718e3744 | 230 | if (!lsa) |
231 | return NULL; | |
232 | } | |
233 | ||
234 | return lsa; | |
235 | } | |
236 | ||
237 | \f | |
238 | /* Update ASBR status. */ | |
239 | void | |
e84cc647 | 240 | ospf_asbr_status_update (struct ospf *ospf, u_char status) |
718e3744 | 241 | { |
242 | zlog_info ("ASBR[Status:%d]: Update", status); | |
243 | ||
244 | /* ASBR on. */ | |
245 | if (status) | |
246 | { | |
247 | /* Already ASBR. */ | |
e84cc647 | 248 | if (IS_OSPF_ASBR (ospf)) |
718e3744 | 249 | { |
250 | zlog_info ("ASBR[Status:%d]: Already ASBR", status); | |
251 | return; | |
252 | } | |
e84cc647 | 253 | SET_FLAG (ospf->flags, OSPF_FLAG_ASBR); |
718e3744 | 254 | } |
255 | else | |
256 | { | |
257 | /* Already non ASBR. */ | |
e84cc647 | 258 | if (! IS_OSPF_ASBR (ospf)) |
718e3744 | 259 | { |
260 | zlog_info ("ASBR[Status:%d]: Already non ASBR", status); | |
261 | return; | |
262 | } | |
e84cc647 | 263 | UNSET_FLAG (ospf->flags, OSPF_FLAG_ASBR); |
718e3744 | 264 | } |
265 | ||
266 | /* Transition from/to status ASBR, schedule timer. */ | |
e84cc647 | 267 | ospf_spf_calculate_schedule (ospf); |
268 | OSPF_TIMER_ON (ospf->t_router_lsa_update, | |
718e3744 | 269 | ospf_router_lsa_update_timer, OSPF_LSA_UPDATE_DELAY); |
270 | } | |
271 | ||
272 | void | |
273 | ospf_redistribute_withdraw (u_char type) | |
274 | { | |
e84cc647 | 275 | struct ospf *ospf; |
718e3744 | 276 | struct route_node *rn; |
277 | struct external_info *ei; | |
278 | ||
e84cc647 | 279 | ospf = ospf_lookup (); |
280 | ||
718e3744 | 281 | /* Delete external info for specified type. */ |
282 | if (EXTERNAL_INFO (type)) | |
283 | for (rn = route_top (EXTERNAL_INFO (type)); rn; rn = route_next (rn)) | |
284 | if ((ei = rn->info)) | |
e84cc647 | 285 | if (ospf_external_info_find_lsa (ospf, &ei->p)) |
718e3744 | 286 | { |
287 | if (is_prefix_default (&ei->p) && | |
e84cc647 | 288 | ospf->default_originate != DEFAULT_ORIGINATE_NONE) |
718e3744 | 289 | continue; |
5339cfdb | 290 | ospf_external_lsa_flush (ospf, type, &ei->p, |
291 | ei->ifindex /*, ei->nexthop */); | |
718e3744 | 292 | ospf_external_info_delete (type, ei->p); |
293 | } | |
294 | } |