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718e3744 | 1 | /* |
2 | * OSPF Interface functions. | |
3 | * Copyright (C) 1999, 2000 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 | |
8 | * it under the terms of the GNU General Public License as published | |
9 | * by the Free Software Foundation; either version 2, or (at your | |
10 | * option) any 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 | |
19 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | * Boston, MA 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "thread.h" | |
26 | #include "linklist.h" | |
27 | #include "prefix.h" | |
28 | #include "if.h" | |
29 | #include "table.h" | |
30 | #include "memory.h" | |
31 | #include "command.h" | |
32 | #include "stream.h" | |
33 | #include "log.h" | |
34 | ||
35 | #include "ospfd/ospf_spf.h" | |
36 | #include "ospfd/ospf_interface.h" | |
37 | #include "ospfd/ospf_ism.h" | |
38 | #include "ospfd/ospf_asbr.h" | |
39 | #include "ospfd/ospf_lsa.h" | |
40 | #include "ospfd/ospf_lsdb.h" | |
41 | #include "ospfd/ospf_neighbor.h" | |
42 | #include "ospfd/ospf_nsm.h" | |
43 | #include "ospfd/ospf_packet.h" | |
44 | #include "ospfd/ospf_abr.h" | |
45 | #include "ospfd/ospfd.h" | |
46 | #include "ospfd/ospf_network.h" | |
47 | #include "ospfd/ospf_dump.h" | |
48 | #ifdef HAVE_SNMP | |
49 | #include "ospfd/ospf_snmp.h" | |
50 | #endif /* HAVE_SNMP */ | |
51 | ||
52 | \f | |
53 | int | |
54 | ospf_if_get_output_cost (struct ospf_interface *oi) | |
55 | { | |
56 | /* If all else fails, use default OSPF cost */ | |
57 | u_int32_t cost; | |
58 | u_int32_t bw, refbw; | |
59 | ||
60 | bw = oi->ifp->bandwidth ? oi->ifp->bandwidth : OSPF_DEFAULT_BANDWIDTH; | |
61 | refbw = ospf_top ? ospf_top->ref_bandwidth : OSPF_DEFAULT_REF_BANDWIDTH; | |
62 | ||
63 | /* A specifed ip ospf cost overrides a calculated one. */ | |
64 | if (OSPF_IF_PARAM_CONFIGURED (IF_DEF_PARAMS (oi->ifp), output_cost_cmd) || | |
65 | OSPF_IF_PARAM_CONFIGURED (oi->params, output_cost_cmd)) | |
66 | cost = OSPF_IF_PARAM (oi, output_cost_cmd); | |
67 | /* See if a cost can be calculated from the zebra processes | |
68 | interface bandwidth field. */ | |
69 | else | |
70 | { | |
71 | cost = (u_int32_t) ((double)refbw / (double)bw + (double)0.5); | |
72 | if (cost < 1) | |
73 | cost = 1; | |
74 | else if (cost > 65535) | |
75 | cost = 65535; | |
76 | } | |
77 | ||
78 | return cost; | |
79 | } | |
80 | ||
81 | void | |
82 | ospf_if_recalculate_output_cost (struct interface *ifp) | |
83 | { | |
84 | u_int32_t newcost; | |
85 | struct route_node *rn; | |
86 | ||
87 | for (rn = route_top (IF_OIFS (ifp)); rn; rn = route_next (rn)) | |
88 | { | |
89 | struct ospf_interface *oi; | |
90 | ||
91 | if ( (oi = rn->info) == NULL) | |
92 | continue; | |
93 | ||
94 | newcost = ospf_if_get_output_cost (oi); | |
95 | ||
96 | /* Is actual output cost changed? */ | |
97 | if (oi->output_cost != newcost) | |
98 | { | |
99 | oi->output_cost = newcost; | |
100 | ospf_router_lsa_timer_add (oi->area); | |
101 | } | |
102 | } | |
103 | } | |
104 | ||
105 | void | |
106 | ospf_if_reset_variables (struct ospf_interface *oi) | |
107 | { | |
108 | /* Set default values. */ | |
109 | /* don't clear this flag. oi->flag = OSPF_IF_DISABLE; */ | |
110 | ||
111 | if (oi->vl_data) | |
112 | oi->type = OSPF_IFTYPE_VIRTUALLINK; | |
113 | else | |
114 | /* preserve network-type */ | |
115 | if (oi->type != OSPF_IFTYPE_NBMA) | |
116 | oi->type = OSPF_IFTYPE_BROADCAST; | |
117 | ||
118 | oi->state = ISM_Down; | |
119 | ||
120 | oi->crypt_seqnum = 0; | |
121 | ||
122 | /* This must be short, (less than RxmtInterval) | |
123 | - RFC 2328 Section 13.5 para 3. Set to 1 second to avoid Acks being | |
124 | held back for too long - MAG */ | |
125 | oi->v_ls_ack = 1; | |
126 | } | |
127 | ||
128 | void | |
129 | ospf_add_to_if (struct interface *ifp, struct ospf_interface *oi) | |
130 | { | |
131 | struct route_node *rn; | |
132 | struct prefix p; | |
133 | ||
134 | p = *oi->address; | |
135 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
136 | ||
137 | rn = route_node_get (IF_OIFS (ifp), &p); | |
138 | assert (! rn->info); | |
139 | rn->info = oi; | |
140 | } | |
141 | ||
142 | void | |
143 | ospf_delete_from_if (struct interface *ifp, struct ospf_interface *oi) | |
144 | { | |
145 | struct route_node *rn; | |
146 | struct prefix p; | |
147 | ||
148 | p = *oi->address; | |
149 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
150 | ||
151 | rn = route_node_lookup (IF_OIFS (oi->ifp), &p); | |
152 | assert (rn); | |
153 | assert (rn->info); | |
154 | rn->info = NULL; | |
155 | route_unlock_node (rn); | |
156 | route_unlock_node (rn); | |
157 | } | |
158 | ||
159 | struct ospf_interface * | |
160 | ospf_if_new (struct interface *ifp, struct prefix *p) | |
161 | { | |
162 | struct ospf_interface *oi; | |
163 | ||
164 | oi = XCALLOC (MTYPE_OSPF_IF, sizeof (struct ospf_interface)); | |
165 | memset (oi, 0, sizeof (struct ospf_interface)); | |
166 | ||
167 | /* Set zebra interface pointer. */ | |
168 | oi->ifp = ifp; | |
169 | oi->address = p; | |
170 | ||
171 | ospf_add_to_if (ifp, oi); | |
172 | listnode_add (ospf_top->oiflist, oi); | |
173 | ||
174 | /* Clear self-originated network-LSA. */ | |
175 | oi->network_lsa_self = NULL; | |
176 | ||
177 | /* Initialize neighbor list. */ | |
178 | oi->nbrs = route_table_init (); | |
179 | ||
180 | /* Initialize static neighbor list. */ | |
181 | oi->nbr_nbma = list_new (); | |
182 | ||
183 | /* Initialize Link State Acknowledgment list. */ | |
184 | oi->ls_ack = list_new (); | |
185 | oi->ls_ack_direct.ls_ack = list_new (); | |
186 | ||
187 | /* Set default values. */ | |
188 | ospf_if_reset_variables (oi); | |
189 | ||
190 | /* Add pseudo neighbor. */ | |
191 | oi->nbr_self = ospf_nbr_new (oi); | |
192 | oi->nbr_self->state = NSM_TwoWay; | |
193 | /* oi->nbr_self->router_id = ospf_top->router_id; */ | |
194 | oi->nbr_self->priority = OSPF_IF_PARAM (oi, priority); | |
195 | oi->nbr_self->options = OSPF_OPTION_E; | |
196 | ||
197 | oi->ls_upd_queue = route_table_init (); | |
198 | oi->t_ls_upd_event = NULL; | |
199 | oi->t_ls_ack_direct = NULL; | |
200 | ||
201 | #ifdef HAVE_OPAQUE_LSA | |
202 | ospf_opaque_type9_lsa_init (oi); | |
203 | #endif /* HAVE_OPAQUE_LSA */ | |
204 | ||
205 | oi->ospf = ospf_top; | |
206 | ||
207 | return oi; | |
208 | } | |
209 | ||
210 | /* Restore an interface to its pre UP state | |
211 | Used from ism_interface_down only */ | |
212 | void | |
213 | ospf_if_cleanup (struct ospf_interface *oi) | |
214 | { | |
215 | struct route_node *rn; | |
216 | listnode node; | |
217 | struct ospf_neighbor *nbr; | |
218 | ||
219 | /* oi->nbrs and oi->nbr_nbma should be deletete on InterafceDown event */ | |
220 | /* delete all static neighbors attached to this interface */ | |
221 | for (node = listhead (oi->nbr_nbma); node; ) | |
222 | { | |
223 | struct ospf_nbr_nbma *nbr_nbma = getdata (node); | |
224 | nextnode (node); | |
225 | ||
226 | OSPF_POLL_TIMER_OFF (nbr_nbma->t_poll); | |
227 | ||
228 | if (nbr_nbma->nbr) | |
229 | { | |
230 | nbr_nbma->nbr->nbr_nbma = NULL; | |
231 | nbr_nbma->nbr = NULL; | |
232 | } | |
233 | ||
234 | nbr_nbma->oi = NULL; | |
235 | ||
236 | listnode_delete (oi->nbr_nbma, nbr_nbma); | |
237 | } | |
238 | ||
239 | /* send Neighbor event KillNbr to all associated neighbors. */ | |
240 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
241 | if ((nbr = rn->info) != NULL) | |
242 | if (nbr != oi->nbr_self) | |
243 | OSPF_NSM_EVENT_EXECUTE (nbr, NSM_KillNbr); | |
244 | ||
245 | /* Cleanup Link State Acknowlegdment list. */ | |
246 | for (node = listhead (oi->ls_ack); node; nextnode (node)) | |
247 | ospf_lsa_unlock (node->data); | |
248 | list_delete_all_node (oi->ls_ack); | |
249 | ||
250 | oi->crypt_seqnum = 0; | |
251 | ||
252 | /* Empty link state update queue */ | |
253 | ospf_ls_upd_queue_empty (oi); | |
254 | ||
255 | /* Handle pseudo neighbor. */ | |
256 | ospf_nbr_delete (oi->nbr_self); | |
257 | oi->nbr_self = ospf_nbr_new (oi); | |
258 | oi->nbr_self->state = NSM_TwoWay; | |
259 | oi->nbr_self->priority = OSPF_IF_PARAM (oi, priority); | |
260 | oi->nbr_self->options = OSPF_OPTION_E; | |
261 | ||
262 | ospf_lsa_unlock (oi->network_lsa_self); | |
263 | oi->network_lsa_self = NULL; | |
264 | OSPF_TIMER_OFF (oi->t_network_lsa_self); | |
265 | } | |
266 | ||
267 | void | |
268 | ospf_if_free (struct ospf_interface *oi) | |
269 | { | |
270 | ospf_if_down (oi); | |
271 | ||
272 | assert (oi->state == ISM_Down); | |
273 | ||
274 | #ifdef HAVE_OPAQUE_LSA | |
275 | ospf_opaque_type9_lsa_term (oi); | |
276 | #endif /* HAVE_OPAQUE_LSA */ | |
277 | ||
278 | /* Free Pseudo Neighbour */ | |
279 | ospf_nbr_delete (oi->nbr_self); | |
280 | ||
281 | route_table_finish (oi->nbrs); | |
282 | route_table_finish (oi->ls_upd_queue); | |
283 | ||
284 | /* Free any lists that should be freed */ | |
285 | list_free (oi->nbr_nbma); | |
286 | ||
287 | list_free (oi->ls_ack); | |
288 | list_free (oi->ls_ack_direct.ls_ack); | |
289 | ||
290 | ospf_delete_from_if (oi->ifp, oi); | |
291 | ||
292 | listnode_delete (ospf_top->oiflist, oi); | |
293 | listnode_delete (oi->area->oiflist, oi); | |
294 | ||
295 | memset (oi, 0, sizeof (*oi)); | |
296 | XFREE (MTYPE_OSPF_IF, oi); | |
297 | } | |
298 | ||
299 | \f | |
300 | /* | |
301 | * check if interface with given address is configured and | |
302 | * return it if yes. | |
303 | */ | |
304 | struct ospf_interface * | |
305 | ospf_if_is_configured (struct in_addr *address) | |
306 | { | |
307 | listnode node; | |
308 | struct ospf_interface *oi; | |
309 | struct prefix *addr; | |
310 | ||
311 | for (node = listhead (ospf_top->oiflist); node; nextnode (node)) | |
312 | if ((oi = getdata (node)) != NULL && oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
313 | { | |
314 | if (oi->type == OSPF_IFTYPE_POINTOPOINT) | |
315 | addr = oi->connected->destination; | |
316 | else | |
317 | addr = oi->address; | |
318 | ||
319 | if (IPV4_ADDR_SAME (address, &addr->u.prefix4)) | |
320 | return oi; | |
321 | } | |
322 | ||
323 | return NULL; | |
324 | } | |
325 | ||
326 | int | |
327 | ospf_if_is_up (struct ospf_interface *oi) | |
328 | { | |
329 | return if_is_up (oi->ifp); | |
330 | } | |
331 | ||
332 | struct ospf_interface * | |
333 | ospf_if_lookup_by_local_addr (struct interface *ifp, struct in_addr address) | |
334 | { | |
335 | listnode node; | |
336 | struct ospf_interface *oi; | |
337 | ||
338 | for (node = listhead (ospf_top->oiflist); node; nextnode (node)) | |
339 | if ((oi = getdata (node)) != NULL && oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
340 | { | |
341 | if (ifp && oi->ifp != ifp) | |
342 | continue; | |
343 | ||
344 | if (IPV4_ADDR_SAME (&address, &oi->address->u.prefix4)) | |
345 | return oi; | |
346 | } | |
347 | ||
348 | return NULL; | |
349 | } | |
350 | ||
351 | struct ospf_interface * | |
352 | ospf_if_lookup_by_prefix (struct prefix_ipv4 *p) | |
353 | { | |
354 | listnode node; | |
355 | struct ospf_interface *oi; | |
356 | struct prefix ptmp; | |
357 | ||
358 | /* Check each Interface. */ | |
359 | for (node = listhead (ospf_top->oiflist); node; nextnode (node)) { | |
360 | if ((oi = getdata (node)) != NULL && oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
361 | { | |
362 | if (oi->type == OSPF_IFTYPE_POINTOPOINT) { | |
363 | prefix_copy (&ptmp, oi->connected->destination); | |
364 | ptmp.prefixlen = IPV4_MAX_BITLEN; | |
365 | } | |
366 | else | |
367 | prefix_copy (&ptmp, oi->address); | |
368 | ||
369 | apply_mask (&ptmp); | |
370 | if (prefix_same (&ptmp, (struct prefix *) p)) | |
371 | return oi; | |
372 | } | |
373 | } | |
374 | return NULL; | |
375 | } | |
376 | ||
377 | /* determine receiving interface by source of packet */ | |
378 | struct ospf_interface * | |
379 | ospf_if_lookup_recv_interface (struct in_addr src) | |
380 | { | |
381 | listnode node; | |
382 | struct prefix_ipv4 addr; | |
383 | struct ospf_interface *oi, *match; | |
384 | ||
385 | addr.family = AF_INET; | |
386 | addr.prefix = src; | |
387 | addr.prefixlen = IPV4_MAX_BITLEN; | |
388 | ||
389 | match = NULL; | |
390 | ||
391 | for (node = listhead (ospf_top->oiflist); node; nextnode (node)) | |
392 | { | |
393 | oi = getdata (node); | |
394 | ||
395 | if (oi->type == OSPF_IFTYPE_VIRTUALLINK) | |
396 | continue; | |
397 | ||
398 | if (oi->type == OSPF_IFTYPE_POINTOPOINT) | |
399 | { | |
400 | if (IPV4_ADDR_SAME (&oi->connected->destination->u.prefix4, &src)) | |
401 | return oi; | |
402 | } | |
403 | else | |
404 | { | |
405 | if (prefix_match (oi->address, (struct prefix *) &addr)) | |
406 | match = oi; | |
407 | } | |
408 | } | |
409 | ||
410 | return match; | |
411 | } | |
412 | \f | |
413 | void | |
414 | ospf_if_stream_set (struct ospf_interface *oi) | |
415 | { | |
416 | /* set output fifo queue. */ | |
417 | if (oi->obuf == NULL) | |
418 | oi->obuf = ospf_fifo_new (); | |
419 | } | |
420 | ||
421 | void | |
422 | ospf_if_stream_unset (struct ospf_interface *oi) | |
423 | { | |
424 | if (oi->obuf) | |
425 | { | |
426 | ospf_fifo_free (oi->obuf); | |
427 | oi->obuf = NULL; | |
428 | ||
429 | if (oi->on_write_q) | |
430 | { | |
431 | listnode_delete (ospf_top->oi_write_q, oi); | |
432 | if (list_isempty(ospf_top->oi_write_q)) | |
433 | OSPF_TIMER_OFF (ospf_top->t_write); | |
434 | oi->on_write_q = 0; | |
435 | } | |
436 | } | |
437 | } | |
438 | \f | |
439 | struct ospf_if_params * | |
440 | ospf_new_if_params () | |
441 | { | |
442 | struct ospf_if_params *oip; | |
443 | ||
444 | oip = XMALLOC (MTYPE_OSPF_IF_PARAMS, sizeof (struct ospf_if_params)); | |
445 | memset (oip, 0, sizeof (struct ospf_if_params)); | |
446 | ||
447 | if (!oip) | |
448 | return NULL; | |
449 | ||
450 | memset (oip, 0, sizeof (struct ospf_if_params)); | |
451 | ||
452 | UNSET_IF_PARAM (oip, output_cost_cmd); | |
453 | UNSET_IF_PARAM (oip, transmit_delay); | |
454 | UNSET_IF_PARAM (oip, retransmit_interval); | |
455 | UNSET_IF_PARAM (oip, passive_interface); | |
456 | UNSET_IF_PARAM (oip, v_hello); | |
457 | UNSET_IF_PARAM (oip, v_wait); | |
458 | UNSET_IF_PARAM (oip, priority); | |
459 | UNSET_IF_PARAM (oip, type); | |
460 | UNSET_IF_PARAM (oip, auth_simple); | |
461 | UNSET_IF_PARAM (oip, auth_crypt); | |
462 | UNSET_IF_PARAM (oip, auth_type); | |
463 | ||
464 | oip->auth_crypt = list_new (); | |
465 | ||
466 | return oip; | |
467 | } | |
468 | ||
469 | void | |
470 | ospf_del_if_params (struct ospf_if_params *oip) | |
471 | { | |
472 | list_delete (oip->auth_crypt); | |
473 | XFREE (MTYPE_OSPF_IF_PARAMS, oip); | |
474 | } | |
475 | ||
476 | void | |
477 | ospf_free_if_params (struct interface *ifp, struct in_addr addr) | |
478 | { | |
479 | struct ospf_if_params *oip; | |
480 | struct prefix_ipv4 p; | |
481 | struct route_node *rn; | |
482 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
483 | p.prefix = addr; | |
484 | rn = route_node_lookup (IF_OIFS_PARAMS (ifp), (struct prefix*)&p); | |
485 | if (!rn || !rn->info) | |
486 | return; | |
487 | ||
488 | oip = rn->info; | |
489 | route_unlock_node (rn); | |
490 | ||
491 | if (!OSPF_IF_PARAM_CONFIGURED (oip, output_cost_cmd) && | |
492 | !OSPF_IF_PARAM_CONFIGURED (oip, transmit_delay) && | |
493 | !OSPF_IF_PARAM_CONFIGURED (oip, retransmit_interval) && | |
494 | !OSPF_IF_PARAM_CONFIGURED (oip, passive_interface) && | |
495 | !OSPF_IF_PARAM_CONFIGURED (oip, v_hello) && | |
496 | !OSPF_IF_PARAM_CONFIGURED (oip, v_wait) && | |
497 | !OSPF_IF_PARAM_CONFIGURED (oip, priority) && | |
498 | !OSPF_IF_PARAM_CONFIGURED (oip, type) && | |
499 | !OSPF_IF_PARAM_CONFIGURED (oip, auth_simple) && | |
500 | !OSPF_IF_PARAM_CONFIGURED (oip, auth_type) && | |
501 | listcount (oip->auth_crypt) == 0) | |
502 | { | |
503 | ospf_del_if_params (oip); | |
504 | rn->info = NULL; | |
505 | route_unlock_node (rn); | |
506 | } | |
507 | } | |
508 | ||
509 | struct ospf_if_params * | |
510 | ospf_lookup_if_params (struct interface *ifp, struct in_addr addr) | |
511 | { | |
512 | struct prefix_ipv4 p; | |
513 | struct route_node *rn; | |
514 | ||
515 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
516 | p.prefix = addr; | |
517 | ||
518 | rn = route_node_lookup (IF_OIFS_PARAMS (ifp), (struct prefix*)&p); | |
519 | ||
520 | if (rn) | |
521 | { | |
522 | route_unlock_node (rn); | |
523 | return rn->info; | |
524 | } | |
525 | ||
526 | return NULL; | |
527 | } | |
528 | ||
529 | struct ospf_if_params * | |
530 | ospf_get_if_params (struct interface *ifp, struct in_addr addr) | |
531 | { | |
532 | struct prefix_ipv4 p; | |
533 | struct route_node *rn; | |
534 | ||
535 | p.family = AF_INET; | |
536 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
537 | p.prefix = addr; | |
538 | ||
539 | rn = route_node_get (IF_OIFS_PARAMS (ifp), (struct prefix*)&p); | |
540 | ||
541 | if (rn->info == NULL) | |
542 | rn->info = ospf_new_if_params (); | |
543 | else | |
544 | route_unlock_node (rn); | |
545 | ||
546 | return rn->info; | |
547 | } | |
548 | ||
549 | void | |
550 | ospf_if_update_params (struct interface *ifp, struct in_addr addr) | |
551 | { | |
552 | struct route_node *rn; | |
553 | struct ospf_interface *oi; | |
554 | ||
555 | for (rn = route_top (IF_OIFS (ifp)); rn; rn = route_next (rn)) | |
556 | { | |
557 | if ((oi = rn->info) == NULL) | |
558 | continue; | |
559 | ||
560 | if (IPV4_ADDR_SAME (&oi->address->u.prefix4, &addr)) | |
561 | oi->params = ospf_lookup_if_params (ifp, oi->address->u.prefix4); | |
562 | } | |
563 | } | |
564 | ||
565 | int | |
566 | ospf_if_new_hook (struct interface *ifp) | |
567 | { | |
568 | int rc = 0; | |
569 | ||
570 | ifp->info = XMALLOC (MTYPE_OSPF_IF_INFO, sizeof (struct ospf_if_info)); | |
571 | memset (ifp->info, 0, sizeof (struct ospf_if_info)); | |
572 | ||
573 | IF_OIFS (ifp) = route_table_init (); | |
574 | IF_OIFS_PARAMS (ifp) = route_table_init (); | |
575 | ||
576 | IF_DEF_PARAMS (ifp) = ospf_new_if_params (); | |
577 | ||
578 | SET_IF_PARAM (IF_DEF_PARAMS (ifp), transmit_delay); | |
579 | IF_DEF_PARAMS (ifp)->transmit_delay = OSPF_TRANSMIT_DELAY_DEFAULT; | |
580 | ||
581 | SET_IF_PARAM (IF_DEF_PARAMS (ifp), retransmit_interval); | |
582 | IF_DEF_PARAMS (ifp)->retransmit_interval = OSPF_RETRANSMIT_INTERVAL_DEFAULT; | |
583 | ||
584 | SET_IF_PARAM (IF_DEF_PARAMS (ifp), priority); | |
585 | IF_DEF_PARAMS (ifp)->priority = OSPF_ROUTER_PRIORITY_DEFAULT; | |
586 | ||
587 | SET_IF_PARAM (IF_DEF_PARAMS (ifp), passive_interface); | |
588 | IF_DEF_PARAMS (ifp)->passive_interface = OSPF_IF_ACTIVE; | |
589 | ||
590 | SET_IF_PARAM (IF_DEF_PARAMS (ifp), v_hello); | |
591 | IF_DEF_PARAMS (ifp)->v_hello = OSPF_HELLO_INTERVAL_DEFAULT; | |
592 | ||
593 | SET_IF_PARAM (IF_DEF_PARAMS (ifp), v_wait); | |
594 | IF_DEF_PARAMS (ifp)->v_wait = OSPF_ROUTER_DEAD_INTERVAL_DEFAULT; | |
595 | ||
596 | SET_IF_PARAM (IF_DEF_PARAMS (ifp), auth_simple); | |
597 | memset (IF_DEF_PARAMS (ifp)->auth_simple, 0, OSPF_AUTH_SIMPLE_SIZE); | |
598 | ||
599 | SET_IF_PARAM (IF_DEF_PARAMS (ifp), auth_crypt); | |
600 | IF_DEF_PARAMS (ifp)->auth_crypt = list_new (); | |
601 | ||
602 | SET_IF_PARAM (IF_DEF_PARAMS (ifp), auth_type); | |
603 | IF_DEF_PARAMS (ifp)->auth_type = OSPF_AUTH_NOTSET; | |
604 | ||
605 | #ifdef HAVE_OPAQUE_LSA | |
606 | rc = ospf_opaque_new_if (ifp); | |
607 | #endif /* HAVE_OPAQUE_LSA */ | |
608 | return rc; | |
609 | } | |
610 | ||
611 | int | |
612 | ospf_if_delete_hook (struct interface *ifp) | |
613 | { | |
614 | int rc = 0; | |
615 | #ifdef HAVE_OPAQUE_LSA | |
616 | rc = ospf_opaque_del_if (ifp); | |
617 | #endif /* HAVE_OPAQUE_LSA */ | |
618 | route_table_finish (IF_OIFS (ifp)); | |
619 | route_table_finish (IF_OIFS_PARAMS (ifp)); | |
620 | XFREE (MTYPE_OSPF_IF_INFO, ifp->info); | |
621 | ifp->info = NULL; | |
622 | ||
623 | return rc; | |
624 | } | |
625 | ||
626 | int | |
627 | ospf_if_is_enable (struct ospf_interface *oi) | |
628 | { | |
629 | if (!if_is_loopback (oi->ifp)) | |
630 | if (if_is_up (oi->ifp)) | |
631 | return 1; | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | int | |
637 | ospf_if_up (struct ospf_interface *oi) | |
638 | { | |
639 | if (oi == NULL) | |
640 | return 0; | |
641 | ||
642 | if (oi->type == OSPF_IFTYPE_LOOPBACK) | |
643 | OSPF_ISM_EVENT_SCHEDULE (oi, ISM_LoopInd); | |
644 | else | |
645 | { | |
646 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
647 | ospf_if_add_allspfrouters (ospf_top, oi->address, oi->ifp->ifindex); | |
648 | ospf_if_stream_set (oi); | |
649 | OSPF_ISM_EVENT_SCHEDULE (oi, ISM_InterfaceUp); | |
650 | } | |
651 | ||
652 | return 1; | |
653 | } | |
654 | ||
655 | int | |
656 | ospf_if_down (struct ospf_interface *oi) | |
657 | { | |
658 | if (oi == NULL) | |
659 | return 0; | |
660 | ||
661 | OSPF_ISM_EVENT_EXECUTE (oi, ISM_InterfaceDown); | |
662 | /* Shutdown packet reception and sending */ | |
663 | ospf_if_stream_unset (oi); | |
664 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
665 | ospf_if_drop_allspfrouters (ospf_top, oi->address, oi->ifp->ifindex); | |
666 | ||
667 | ||
668 | return 1; | |
669 | } | |
670 | ||
671 | \f | |
672 | /* Virtual Link related functions. */ | |
673 | ||
674 | struct ospf_vl_data * | |
675 | ospf_vl_data_new (struct ospf_area *area, struct in_addr vl_peer) | |
676 | { | |
677 | struct ospf_vl_data *vl_data; | |
678 | ||
679 | vl_data = XMALLOC (MTYPE_OSPF_VL_DATA, sizeof (struct ospf_vl_data)); | |
680 | memset (vl_data, 0, sizeof (struct ospf_vl_data)); | |
681 | ||
682 | vl_data->vl_peer.s_addr = vl_peer.s_addr; | |
683 | vl_data->vl_area_id = area->area_id; | |
684 | vl_data->format = area->format; | |
685 | ||
686 | return vl_data; | |
687 | } | |
688 | ||
689 | void | |
690 | ospf_vl_data_free (struct ospf_vl_data *vl_data) | |
691 | { | |
692 | XFREE (MTYPE_OSPF_VL_DATA, vl_data); | |
693 | } | |
694 | ||
695 | u_int vlink_count = 0; | |
696 | ||
697 | struct ospf_interface * | |
698 | ospf_vl_new (struct ospf_vl_data *vl_data) | |
699 | { | |
700 | struct ospf_interface * voi; | |
701 | struct interface * vi; | |
702 | char ifname[INTERFACE_NAMSIZ + 1]; | |
703 | struct ospf_area *area; | |
704 | struct in_addr area_id; | |
705 | struct connected *co; | |
706 | struct prefix_ipv4 *p; | |
707 | ||
708 | if (IS_DEBUG_OSPF_EVENT) | |
709 | zlog_info ("ospf_vl_new(): Start"); | |
710 | if (vlink_count == OSPF_VL_MAX_COUNT) | |
711 | { | |
712 | if (IS_DEBUG_OSPF_EVENT) | |
713 | zlog_info ("ospf_vl_new(): Alarm: " | |
714 | "cannot create more than OSPF_MAX_VL_COUNT virtual links"); | |
715 | return NULL; | |
716 | } | |
717 | ||
718 | if (IS_DEBUG_OSPF_EVENT) | |
719 | zlog_info ("ospf_vl_new(): creating pseudo zebra interface"); | |
720 | ||
721 | vi = if_create (); | |
722 | co = connected_new (); | |
723 | co->ifp = vi; | |
724 | listnode_add (vi->connected, co); | |
725 | ||
726 | p = prefix_ipv4_new (); | |
727 | p->family = AF_INET; | |
728 | p->prefix.s_addr = 0; | |
729 | p->prefixlen = 0; | |
730 | ||
731 | co->address = (struct prefix *)p; | |
732 | ||
733 | voi = ospf_if_new (vi, co->address); | |
734 | if (voi == NULL) | |
735 | { | |
736 | if (IS_DEBUG_OSPF_EVENT) | |
737 | zlog_info ("ospf_vl_new(): Alarm: OSPF int structure is not created"); | |
738 | return NULL; | |
739 | } | |
740 | voi->connected = co; | |
741 | voi->vl_data = vl_data; | |
742 | voi->ifp->mtu = OSPF_VL_MTU; | |
743 | voi->type = OSPF_IFTYPE_VIRTUALLINK; | |
744 | ||
745 | sprintf (ifname, "VLINK%d", vlink_count++); | |
746 | if (IS_DEBUG_OSPF_EVENT) | |
747 | zlog_info ("ospf_vl_new(): Created name: %s", ifname); | |
748 | strncpy (vi->name, ifname, IFNAMSIZ); | |
749 | if (IS_DEBUG_OSPF_EVENT) | |
750 | zlog_info ("ospf_vl_new(): set if->name to %s", vi->name); | |
751 | ||
752 | area_id.s_addr = 0; | |
753 | area = ospf_area_get (area_id, OSPF_AREA_ID_FORMAT_ADDRESS); | |
754 | voi->area = area; | |
755 | ||
756 | if (IS_DEBUG_OSPF_EVENT) | |
757 | zlog_info ("ospf_vl_new(): set associated area to the backbone"); | |
758 | ||
759 | ospf_area_add_if (voi->area, voi); | |
760 | ||
761 | ospf_if_stream_set (voi); | |
762 | ||
763 | if (IS_DEBUG_OSPF_EVENT) | |
764 | zlog_info ("ospf_vl_new(): Stop"); | |
765 | return voi; | |
766 | } | |
767 | ||
768 | void | |
769 | ospf_vl_if_delete (struct ospf_vl_data *vl_data) | |
770 | { | |
771 | struct interface *ifp = vl_data->vl_oi->ifp; | |
772 | vl_data->vl_oi->address->u.prefix4.s_addr = 0; | |
773 | vl_data->vl_oi->address->prefixlen = 0; | |
774 | ospf_if_free (vl_data->vl_oi); | |
775 | if_delete (ifp); | |
776 | vlink_count--; | |
777 | } | |
778 | ||
779 | struct ospf_vl_data * | |
780 | ospf_vl_lookup (struct ospf_area *area, struct in_addr vl_peer) | |
781 | { | |
782 | struct ospf_vl_data *vl_data; | |
783 | listnode node; | |
784 | ||
785 | for (node = listhead (ospf_top->vlinks); node; nextnode (node)) | |
786 | if ((vl_data = getdata (node)) != NULL) | |
787 | if (vl_data->vl_peer.s_addr == vl_peer.s_addr && | |
788 | IPV4_ADDR_SAME (&vl_data->vl_area_id, &area->area_id)) | |
789 | return vl_data; | |
790 | ||
791 | return NULL; | |
792 | } | |
793 | ||
794 | void | |
795 | ospf_vl_shutdown (struct ospf_vl_data *vl_data) | |
796 | { | |
797 | struct ospf_interface *oi; | |
798 | ||
799 | if ((oi = vl_data->vl_oi) == NULL) | |
800 | return; | |
801 | ||
802 | oi->address->u.prefix4.s_addr = 0; | |
803 | oi->address->prefixlen = 0; | |
804 | ||
805 | UNSET_FLAG (oi->ifp->flags, IFF_UP); | |
806 | /* OSPF_ISM_EVENT_SCHEDULE (oi, ISM_InterfaceDown); */ | |
807 | OSPF_ISM_EVENT_EXECUTE (oi, ISM_InterfaceDown); | |
808 | } | |
809 | ||
810 | void | |
811 | ospf_vl_add (struct ospf_vl_data *vl_data) | |
812 | { | |
813 | listnode_add (ospf_top->vlinks, vl_data); | |
814 | #ifdef HAVE_SNMP | |
815 | ospf_snmp_vl_add (vl_data); | |
816 | #endif /* HAVE_SNMP */ | |
817 | } | |
818 | ||
819 | void | |
820 | ospf_vl_delete (struct ospf_vl_data *vl_data) | |
821 | { | |
822 | ospf_vl_shutdown (vl_data); | |
823 | ospf_vl_if_delete (vl_data); | |
824 | ||
825 | #ifdef HAVE_SNMP | |
826 | ospf_snmp_vl_delete (vl_data); | |
827 | #endif /* HAVE_SNMP */ | |
828 | listnode_delete (ospf_top->vlinks, vl_data); | |
829 | ||
830 | ospf_vl_data_free (vl_data); | |
831 | } | |
832 | ||
833 | void | |
834 | ospf_vl_set_params (struct ospf_vl_data *vl_data, struct vertex *v) | |
835 | { | |
836 | int changed = 0; | |
837 | struct ospf_interface *voi; | |
838 | listnode node; | |
839 | struct vertex_nexthop *nh; | |
840 | int i; | |
841 | struct router_lsa *rl; | |
842 | ||
843 | voi = vl_data->vl_oi; | |
844 | ||
845 | if (voi->output_cost != v->distance) | |
846 | { | |
847 | voi->output_cost = v->distance; | |
848 | changed = 1; | |
849 | } | |
850 | ||
851 | for (node = listhead (v->nexthop); node; nextnode (node)) | |
852 | if ((nh = getdata (node)) != NULL) | |
853 | { | |
854 | vl_data->out_oi = (struct ospf_interface *) nh->oi; | |
855 | ||
856 | voi->address->u.prefix4 = vl_data->out_oi->address->u.prefix4; | |
857 | voi->address->prefixlen = vl_data->out_oi->address->prefixlen; | |
858 | ||
859 | break; /* We take the first interface. */ | |
860 | } | |
861 | ||
862 | rl = (struct router_lsa *)v->lsa; | |
863 | ||
864 | for (i = 0; i < ntohs (rl->links); i++) | |
865 | { | |
866 | switch (rl->link[i].type) | |
867 | { | |
868 | case LSA_LINK_TYPE_VIRTUALLINK: | |
869 | if (IS_DEBUG_OSPF_EVENT) | |
870 | zlog_info ("found back link through VL"); | |
871 | case LSA_LINK_TYPE_TRANSIT: | |
872 | case LSA_LINK_TYPE_POINTOPOINT: | |
873 | vl_data->peer_addr = rl->link[i].link_data; | |
874 | if (IS_DEBUG_OSPF_EVENT) | |
875 | zlog_info ("%s peer address is %s\n", | |
876 | vl_data->vl_oi->ifp->name, inet_ntoa(vl_data->peer_addr)); | |
877 | return; | |
878 | } | |
879 | } | |
880 | } | |
881 | ||
882 | ||
883 | void | |
884 | ospf_vl_up_check (struct ospf_area * area, struct in_addr rid, | |
885 | struct vertex *v) | |
886 | { | |
887 | listnode node; | |
888 | struct ospf_vl_data *vl_data; | |
889 | struct ospf_interface *oi; | |
890 | ||
891 | if (IS_DEBUG_OSPF_EVENT) | |
892 | { | |
893 | zlog_info ("ospf_vl_up_check(): Start"); | |
894 | zlog_info ("ospf_vl_up_check(): Router ID is %s", inet_ntoa (rid)); | |
895 | zlog_info ("ospf_vl_up_check(): Area is %s", inet_ntoa (area->area_id)); | |
896 | } | |
897 | ||
898 | for (node = listhead (ospf_top->vlinks); node; nextnode (node)) | |
899 | { | |
900 | if ((vl_data = getdata (node)) == NULL) | |
901 | continue; | |
902 | ||
903 | if (IS_DEBUG_OSPF_EVENT) | |
904 | { | |
905 | zlog_info ("ospf_vl_up_check(): considering VL, name: %s", | |
906 | vl_data->vl_oi->ifp->name); | |
907 | zlog_info ("ospf_vl_up_check(): VL area: %s, peer ID: %s", | |
908 | inet_ntoa (vl_data->vl_area_id), | |
909 | inet_ntoa (vl_data->vl_peer)); | |
910 | } | |
911 | ||
912 | if (IPV4_ADDR_SAME (&vl_data->vl_peer, &rid) && | |
913 | IPV4_ADDR_SAME (&vl_data->vl_area_id, &area->area_id)) | |
914 | { | |
915 | oi = vl_data->vl_oi; | |
916 | SET_FLAG (vl_data->flags, OSPF_VL_FLAG_APPROVED); | |
917 | ||
918 | if (IS_DEBUG_OSPF_EVENT) | |
919 | zlog_info ("ospf_vl_up_check(): this VL matched"); | |
920 | ||
921 | if (oi->state == ISM_Down) | |
922 | { | |
923 | if (IS_DEBUG_OSPF_EVENT) | |
924 | zlog_info ("ospf_vl_up_check(): VL is down, waking it up"); | |
925 | SET_FLAG (oi->ifp->flags, IFF_UP); | |
926 | OSPF_ISM_EVENT_SCHEDULE (oi, ISM_InterfaceUp); | |
927 | } | |
928 | ||
929 | ospf_vl_set_params (vl_data, v); | |
930 | } | |
931 | } | |
932 | } | |
933 | ||
934 | void | |
935 | ospf_vl_unapprove () | |
936 | { | |
937 | listnode node; | |
938 | struct ospf_vl_data *vl_data; | |
939 | ||
940 | for (node = listhead (ospf_top->vlinks); node; nextnode (node)) | |
941 | if ((vl_data = getdata (node)) != NULL) | |
942 | UNSET_FLAG (vl_data->flags, OSPF_VL_FLAG_APPROVED); | |
943 | } | |
944 | ||
945 | void | |
946 | ospf_vl_shut_unapproved () | |
947 | { | |
948 | listnode node; | |
949 | struct ospf_vl_data *vl_data; | |
950 | ||
951 | for (node = listhead (ospf_top->vlinks); node; nextnode (node)) | |
952 | if ((vl_data = getdata (node)) != NULL) | |
953 | if (!CHECK_FLAG (vl_data->flags, OSPF_VL_FLAG_APPROVED)) | |
954 | ospf_vl_shutdown (vl_data); | |
955 | } | |
956 | ||
957 | int | |
958 | ospf_full_virtual_nbrs (struct ospf_area *area) | |
959 | { | |
960 | if (IS_DEBUG_OSPF_EVENT) | |
961 | { | |
962 | zlog_info ("counting fully adjacent virtual neighbors in area %s", | |
963 | inet_ntoa (area->area_id)); | |
964 | zlog_info ("there are %d of them", area->full_vls); | |
965 | } | |
966 | ||
967 | return area->full_vls; | |
968 | } | |
969 | ||
970 | int | |
971 | ospf_vls_in_area (struct ospf_area *area) | |
972 | { | |
973 | listnode node; | |
974 | struct ospf_vl_data *vl_data; | |
975 | int c = 0; | |
976 | ||
977 | for (node = listhead (ospf_top->vlinks); node; nextnode (node)) | |
978 | if ((vl_data = getdata (node)) != NULL) | |
979 | if (IPV4_ADDR_SAME (&vl_data->vl_area_id, &area->area_id)) | |
980 | c++; | |
981 | ||
982 | return c; | |
983 | } | |
984 | ||
985 | \f | |
986 | struct crypt_key * | |
987 | ospf_crypt_key_new () | |
988 | { | |
989 | struct crypt_key *ck; | |
990 | ||
991 | ck = XMALLOC (MTYPE_OSPF_CRYPT_KEY, sizeof (struct crypt_key)); | |
992 | memset (ck, 0, sizeof (struct crypt_key)); | |
993 | ||
994 | return ck; | |
995 | } | |
996 | ||
997 | void | |
998 | ospf_crypt_key_add (list crypt, struct crypt_key *ck) | |
999 | { | |
1000 | listnode_add (crypt, ck); | |
1001 | } | |
1002 | ||
1003 | struct crypt_key * | |
1004 | ospf_crypt_key_lookup (list auth_crypt, u_char key_id) | |
1005 | { | |
1006 | listnode node; | |
1007 | struct crypt_key *ck; | |
1008 | ||
1009 | for (node = listhead (auth_crypt); node; nextnode (node)) | |
1010 | { | |
1011 | ck = getdata (node); | |
1012 | if (ck->key_id == key_id) | |
1013 | return ck; | |
1014 | } | |
1015 | ||
1016 | return NULL; | |
1017 | } | |
1018 | ||
1019 | int | |
1020 | ospf_crypt_key_delete (list auth_crypt, u_char key_id) | |
1021 | { | |
1022 | listnode node; | |
1023 | struct crypt_key *ck; | |
1024 | ||
1025 | for (node = listhead (auth_crypt); node; nextnode (node)) | |
1026 | { | |
1027 | ck = getdata (node); | |
1028 | if (ck->key_id == key_id) | |
1029 | { | |
1030 | listnode_delete (auth_crypt, ck); | |
1031 | return 1; | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | void | |
1039 | ospf_if_init () | |
1040 | { | |
1041 | /* Initialize Zebra interface data structure. */ | |
1042 | if_init (); | |
1043 | if_add_hook (IF_NEW_HOOK, ospf_if_new_hook); | |
1044 | if_add_hook (IF_DELETE_HOOK, ospf_if_delete_hook); | |
1045 | } |