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Merge pull request #2848 from donaldsharp/more_init
[mirror_frr.git] / ospf6d / ospf6_message.c
1 /*
2 * Copyright (C) 2003 Yasuhiro Ohara
3 *
4 * This file is part of GNU Zebra.
5 *
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
9 * later version.
10 *
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <zebra.h>
22
23 #include "memory.h"
24 #include "log.h"
25 #include "vty.h"
26 #include "command.h"
27 #include "thread.h"
28 #include "linklist.h"
29 #include "lib_errors.h"
30
31 #include "ospf6_proto.h"
32 #include "ospf6_lsa.h"
33 #include "ospf6_lsdb.h"
34 #include "ospf6_network.h"
35 #include "ospf6_message.h"
36
37 #include "ospf6_top.h"
38 #include "ospf6_area.h"
39 #include "ospf6_neighbor.h"
40 #include "ospf6_interface.h"
41
42 /* for structures and macros ospf6_lsa_examin() needs */
43 #include "ospf6_abr.h"
44 #include "ospf6_asbr.h"
45 #include "ospf6_intra.h"
46
47 #include "ospf6_flood.h"
48 #include "ospf6d.h"
49
50 #include <netinet/ip6.h>
51
52 unsigned char conf_debug_ospf6_message[6] = {0x03, 0, 0, 0, 0, 0};
53 static const struct message ospf6_message_type_str[] = {
54 {OSPF6_MESSAGE_TYPE_HELLO, "Hello"},
55 {OSPF6_MESSAGE_TYPE_DBDESC, "DbDesc"},
56 {OSPF6_MESSAGE_TYPE_LSREQ, "LSReq"},
57 {OSPF6_MESSAGE_TYPE_LSUPDATE, "LSUpdate"},
58 {OSPF6_MESSAGE_TYPE_LSACK, "LSAck"},
59 {0}};
60
61 /* Minimum (besides the standard OSPF packet header) lengths for OSPF
62 packets of particular types, offset is the "type" field. */
63 const uint16_t ospf6_packet_minlen[OSPF6_MESSAGE_TYPE_ALL] = {
64 0,
65 OSPF6_HELLO_MIN_SIZE,
66 OSPF6_DB_DESC_MIN_SIZE,
67 OSPF6_LS_REQ_MIN_SIZE,
68 OSPF6_LS_UPD_MIN_SIZE,
69 OSPF6_LS_ACK_MIN_SIZE};
70
71 /* Minimum (besides the standard LSA header) lengths for LSAs of particular
72 types, offset is the "LSA function code" portion of "LSA type" field. */
73 const uint16_t ospf6_lsa_minlen[OSPF6_LSTYPE_SIZE] = {
74 0,
75 /* 0x2001 */ OSPF6_ROUTER_LSA_MIN_SIZE,
76 /* 0x2002 */ OSPF6_NETWORK_LSA_MIN_SIZE,
77 /* 0x2003 */ OSPF6_INTER_PREFIX_LSA_MIN_SIZE,
78 /* 0x2004 */ OSPF6_INTER_ROUTER_LSA_FIX_SIZE,
79 /* 0x4005 */ OSPF6_AS_EXTERNAL_LSA_MIN_SIZE,
80 /* 0x2006 */ 0,
81 /* 0x2007 */ OSPF6_AS_EXTERNAL_LSA_MIN_SIZE,
82 /* 0x0008 */ OSPF6_LINK_LSA_MIN_SIZE,
83 /* 0x2009 */ OSPF6_INTRA_PREFIX_LSA_MIN_SIZE};
84
85 /* print functions */
86
87 static void ospf6_header_print(struct ospf6_header *oh)
88 {
89 char router_id[16], area_id[16];
90 inet_ntop(AF_INET, &oh->router_id, router_id, sizeof(router_id));
91 inet_ntop(AF_INET, &oh->area_id, area_id, sizeof(area_id));
92
93 zlog_debug(" OSPFv%d Type:%d Len:%hu Router-ID:%s", oh->version,
94 oh->type, ntohs(oh->length), router_id);
95 zlog_debug(" Area-ID:%s Cksum:%hx Instance-ID:%d", area_id,
96 ntohs(oh->checksum), oh->instance_id);
97 }
98
99 void ospf6_hello_print(struct ospf6_header *oh)
100 {
101 struct ospf6_hello *hello;
102 char options[16];
103 char drouter[16], bdrouter[16], neighbor[16];
104 char *p;
105
106 ospf6_header_print(oh);
107 assert(oh->type == OSPF6_MESSAGE_TYPE_HELLO);
108
109 hello = (struct ospf6_hello *)((caddr_t)oh
110 + sizeof(struct ospf6_header));
111
112 inet_ntop(AF_INET, &hello->drouter, drouter, sizeof(drouter));
113 inet_ntop(AF_INET, &hello->bdrouter, bdrouter, sizeof(bdrouter));
114 ospf6_options_printbuf(hello->options, options, sizeof(options));
115
116 zlog_debug(" I/F-Id:%ld Priority:%d Option:%s",
117 (unsigned long)ntohl(hello->interface_id), hello->priority,
118 options);
119 zlog_debug(" HelloInterval:%hu DeadInterval:%hu",
120 ntohs(hello->hello_interval), ntohs(hello->dead_interval));
121 zlog_debug(" DR:%s BDR:%s", drouter, bdrouter);
122
123 for (p = (char *)((caddr_t)hello + sizeof(struct ospf6_hello));
124 p + sizeof(uint32_t) <= OSPF6_MESSAGE_END(oh);
125 p += sizeof(uint32_t)) {
126 inet_ntop(AF_INET, (void *)p, neighbor, sizeof(neighbor));
127 zlog_debug(" Neighbor: %s", neighbor);
128 }
129
130 assert(p == OSPF6_MESSAGE_END(oh));
131 }
132
133 void ospf6_dbdesc_print(struct ospf6_header *oh)
134 {
135 struct ospf6_dbdesc *dbdesc;
136 char options[16];
137 char *p;
138
139 ospf6_header_print(oh);
140 assert(oh->type == OSPF6_MESSAGE_TYPE_DBDESC);
141
142 dbdesc = (struct ospf6_dbdesc *)((caddr_t)oh
143 + sizeof(struct ospf6_header));
144
145 ospf6_options_printbuf(dbdesc->options, options, sizeof(options));
146
147 zlog_debug(" MBZ: %#x Option: %s IfMTU: %hu", dbdesc->reserved1,
148 options, ntohs(dbdesc->ifmtu));
149 zlog_debug(" MBZ: %#x Bits: %s%s%s SeqNum: %#lx", dbdesc->reserved2,
150 (CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_IBIT) ? "I" : "-"),
151 (CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_MBIT) ? "M" : "-"),
152 (CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_MSBIT) ? "m" : "s"),
153 (unsigned long)ntohl(dbdesc->seqnum));
154
155 for (p = (char *)((caddr_t)dbdesc + sizeof(struct ospf6_dbdesc));
156 p + sizeof(struct ospf6_lsa_header) <= OSPF6_MESSAGE_END(oh);
157 p += sizeof(struct ospf6_lsa_header))
158 ospf6_lsa_header_print_raw((struct ospf6_lsa_header *)p);
159
160 assert(p == OSPF6_MESSAGE_END(oh));
161 }
162
163 void ospf6_lsreq_print(struct ospf6_header *oh)
164 {
165 char id[16], adv_router[16];
166 char *p;
167
168 ospf6_header_print(oh);
169 assert(oh->type == OSPF6_MESSAGE_TYPE_LSREQ);
170
171 for (p = (char *)((caddr_t)oh + sizeof(struct ospf6_header));
172 p + sizeof(struct ospf6_lsreq_entry) <= OSPF6_MESSAGE_END(oh);
173 p += sizeof(struct ospf6_lsreq_entry)) {
174 struct ospf6_lsreq_entry *e = (struct ospf6_lsreq_entry *)p;
175 inet_ntop(AF_INET, &e->adv_router, adv_router,
176 sizeof(adv_router));
177 inet_ntop(AF_INET, &e->id, id, sizeof(id));
178 zlog_debug(" [%s Id:%s Adv:%s]", ospf6_lstype_name(e->type),
179 id, adv_router);
180 }
181
182 assert(p == OSPF6_MESSAGE_END(oh));
183 }
184
185 void ospf6_lsupdate_print(struct ospf6_header *oh)
186 {
187 struct ospf6_lsupdate *lsupdate;
188 unsigned long num;
189 char *p;
190
191 ospf6_header_print(oh);
192 assert(oh->type == OSPF6_MESSAGE_TYPE_LSUPDATE);
193
194 lsupdate = (struct ospf6_lsupdate *)((caddr_t)oh
195 + sizeof(struct ospf6_header));
196
197 num = ntohl(lsupdate->lsa_number);
198 zlog_debug(" Number of LSA: %ld", num);
199
200 for (p = (char *)((caddr_t)lsupdate + sizeof(struct ospf6_lsupdate));
201 p < OSPF6_MESSAGE_END(oh)
202 && p + OSPF6_LSA_SIZE(p) <= OSPF6_MESSAGE_END(oh);
203 p += OSPF6_LSA_SIZE(p)) {
204 ospf6_lsa_header_print_raw((struct ospf6_lsa_header *)p);
205 }
206
207 assert(p == OSPF6_MESSAGE_END(oh));
208 }
209
210 void ospf6_lsack_print(struct ospf6_header *oh)
211 {
212 char *p;
213
214 ospf6_header_print(oh);
215 assert(oh->type == OSPF6_MESSAGE_TYPE_LSACK);
216
217 for (p = (char *)((caddr_t)oh + sizeof(struct ospf6_header));
218 p + sizeof(struct ospf6_lsa_header) <= OSPF6_MESSAGE_END(oh);
219 p += sizeof(struct ospf6_lsa_header))
220 ospf6_lsa_header_print_raw((struct ospf6_lsa_header *)p);
221
222 assert(p == OSPF6_MESSAGE_END(oh));
223 }
224
225 static void ospf6_hello_recv(struct in6_addr *src, struct in6_addr *dst,
226 struct ospf6_interface *oi,
227 struct ospf6_header *oh)
228 {
229 struct ospf6_hello *hello;
230 struct ospf6_neighbor *on;
231 char *p;
232 int twoway = 0;
233 int neighborchange = 0;
234 int neighbor_ifindex_change = 0;
235 int backupseen = 0;
236
237 hello = (struct ospf6_hello *)((caddr_t)oh
238 + sizeof(struct ospf6_header));
239
240 /* HelloInterval check */
241 if (ntohs(hello->hello_interval) != oi->hello_interval) {
242 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
243 zlog_debug("HelloInterval mismatch");
244 return;
245 }
246
247 /* RouterDeadInterval check */
248 if (ntohs(hello->dead_interval) != oi->dead_interval) {
249 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
250 zlog_debug("RouterDeadInterval mismatch");
251 return;
252 }
253
254 /* E-bit check */
255 if (OSPF6_OPT_ISSET(hello->options, OSPF6_OPT_E)
256 != OSPF6_OPT_ISSET(oi->area->options, OSPF6_OPT_E)) {
257 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
258 zlog_debug("E-bit mismatch");
259 return;
260 }
261
262 /* Find neighbor, create if not exist */
263 on = ospf6_neighbor_lookup(oh->router_id, oi);
264 if (on == NULL) {
265 on = ospf6_neighbor_create(oh->router_id, oi);
266 on->prev_drouter = on->drouter = hello->drouter;
267 on->prev_bdrouter = on->bdrouter = hello->bdrouter;
268 on->priority = hello->priority;
269 }
270
271 /* Always override neighbor's source address */
272 memcpy(&on->linklocal_addr, src, sizeof(struct in6_addr));
273
274 /* Neighbor ifindex check */
275 if (on->ifindex != (ifindex_t)ntohl(hello->interface_id)) {
276 on->ifindex = ntohl(hello->interface_id);
277 neighbor_ifindex_change++;
278 }
279
280 /* TwoWay check */
281 for (p = (char *)((caddr_t)hello + sizeof(struct ospf6_hello));
282 p + sizeof(uint32_t) <= OSPF6_MESSAGE_END(oh);
283 p += sizeof(uint32_t)) {
284 uint32_t *router_id = (uint32_t *)p;
285
286 if (*router_id == oi->area->ospf6->router_id)
287 twoway++;
288 }
289
290 assert(p == OSPF6_MESSAGE_END(oh));
291
292 /* RouterPriority check */
293 if (on->priority != hello->priority) {
294 on->priority = hello->priority;
295 neighborchange++;
296 }
297
298 /* DR check */
299 if (on->drouter != hello->drouter) {
300 on->prev_drouter = on->drouter;
301 on->drouter = hello->drouter;
302 if (on->prev_drouter == on->router_id
303 || on->drouter == on->router_id)
304 neighborchange++;
305 }
306
307 /* BDR check */
308 if (on->bdrouter != hello->bdrouter) {
309 on->prev_bdrouter = on->bdrouter;
310 on->bdrouter = hello->bdrouter;
311 if (on->prev_bdrouter == on->router_id
312 || on->bdrouter == on->router_id)
313 neighborchange++;
314 }
315
316 /* BackupSeen check */
317 if (oi->state == OSPF6_INTERFACE_WAITING) {
318 if (hello->bdrouter == on->router_id)
319 backupseen++;
320 else if (hello->drouter == on->router_id
321 && hello->bdrouter == htonl(0))
322 backupseen++;
323 }
324
325 oi->hello_in++;
326
327 /* Execute neighbor events */
328 thread_execute(master, hello_received, on, 0);
329 if (twoway)
330 thread_execute(master, twoway_received, on, 0);
331 else
332 thread_execute(master, oneway_received, on, 0);
333
334 /* Schedule interface events */
335 if (backupseen)
336 thread_add_event(master, backup_seen, oi, 0, NULL);
337 if (neighborchange)
338 thread_add_event(master, neighbor_change, oi, 0, NULL);
339
340 if (neighbor_ifindex_change && on->state == OSPF6_NEIGHBOR_FULL)
341 OSPF6_ROUTER_LSA_SCHEDULE(oi->area);
342 }
343
344 static void ospf6_dbdesc_recv_master(struct ospf6_header *oh,
345 struct ospf6_neighbor *on)
346 {
347 struct ospf6_dbdesc *dbdesc;
348 char *p;
349
350 dbdesc = (struct ospf6_dbdesc *)((caddr_t)oh
351 + sizeof(struct ospf6_header));
352
353 if (on->state < OSPF6_NEIGHBOR_INIT) {
354 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
355 zlog_debug("Neighbor state less than Init, ignore");
356 return;
357 }
358
359 switch (on->state) {
360 case OSPF6_NEIGHBOR_TWOWAY:
361 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
362 zlog_debug("Neighbor state is 2-Way, ignore");
363 return;
364
365 case OSPF6_NEIGHBOR_INIT:
366 thread_execute(master, twoway_received, on, 0);
367 if (on->state != OSPF6_NEIGHBOR_EXSTART) {
368 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
369 zlog_debug(
370 "Neighbor state is not ExStart, ignore");
371 return;
372 }
373 /* else fall through to ExStart */
374 /* fallthru */
375 case OSPF6_NEIGHBOR_EXSTART:
376 /* if neighbor obeys us as our slave, schedule negotiation_done
377 and process LSA Headers. Otherwise, ignore this message */
378 if (!CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_MSBIT)
379 && !CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_IBIT)
380 && ntohl(dbdesc->seqnum) == on->dbdesc_seqnum) {
381 /* execute NegotiationDone */
382 thread_execute(master, negotiation_done, on, 0);
383
384 /* Record neighbor options */
385 memcpy(on->options, dbdesc->options,
386 sizeof(on->options));
387 } else {
388 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
389 zlog_debug("Negotiation failed");
390 return;
391 }
392 /* fall through to exchange */
393
394 case OSPF6_NEIGHBOR_EXCHANGE:
395 if (!memcmp(dbdesc, &on->dbdesc_last,
396 sizeof(struct ospf6_dbdesc))) {
397 /* Duplicated DatabaseDescription is dropped by master
398 */
399 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
400 zlog_debug(
401 "Duplicated dbdesc discarded by Master, ignore");
402 return;
403 }
404
405 if (CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_MSBIT)) {
406 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
407 zlog_debug("Master/Slave bit mismatch");
408 thread_add_event(master, seqnumber_mismatch, on, 0,
409 NULL);
410 return;
411 }
412
413 if (CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_IBIT)) {
414 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
415 zlog_debug("Initialize bit mismatch");
416 thread_add_event(master, seqnumber_mismatch, on, 0,
417 NULL);
418 return;
419 }
420
421 if (memcmp(on->options, dbdesc->options, sizeof(on->options))) {
422 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
423 zlog_debug("Option field mismatch");
424 thread_add_event(master, seqnumber_mismatch, on, 0,
425 NULL);
426 return;
427 }
428
429 if (ntohl(dbdesc->seqnum) != on->dbdesc_seqnum) {
430 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
431 zlog_debug(
432 "Sequence number mismatch (%#lx expected)",
433 (unsigned long)on->dbdesc_seqnum);
434 thread_add_event(master, seqnumber_mismatch, on, 0,
435 NULL);
436 return;
437 }
438 break;
439
440 case OSPF6_NEIGHBOR_LOADING:
441 case OSPF6_NEIGHBOR_FULL:
442 if (!memcmp(dbdesc, &on->dbdesc_last,
443 sizeof(struct ospf6_dbdesc))) {
444 /* Duplicated DatabaseDescription is dropped by master
445 */
446 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
447 zlog_debug(
448 "Duplicated dbdesc discarded by Master, ignore");
449 return;
450 }
451
452 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
453 zlog_debug("Not duplicate dbdesc in state %s",
454 ospf6_neighbor_state_str[on->state]);
455 thread_add_event(master, seqnumber_mismatch, on, 0, NULL);
456 return;
457
458 default:
459 assert(0);
460 break;
461 }
462
463 /* Process LSA headers */
464 for (p = (char *)((caddr_t)dbdesc + sizeof(struct ospf6_dbdesc));
465 p + sizeof(struct ospf6_lsa_header) <= OSPF6_MESSAGE_END(oh);
466 p += sizeof(struct ospf6_lsa_header)) {
467 struct ospf6_lsa *his, *mine;
468 struct ospf6_lsdb *lsdb = NULL;
469
470 his = ospf6_lsa_create_headeronly((struct ospf6_lsa_header *)p);
471
472 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
473 zlog_debug("%s", his->name);
474
475 switch (OSPF6_LSA_SCOPE(his->header->type)) {
476 case OSPF6_SCOPE_LINKLOCAL:
477 lsdb = on->ospf6_if->lsdb;
478 break;
479 case OSPF6_SCOPE_AREA:
480 lsdb = on->ospf6_if->area->lsdb;
481 break;
482 case OSPF6_SCOPE_AS:
483 lsdb = on->ospf6_if->area->ospf6->lsdb;
484 break;
485 case OSPF6_SCOPE_RESERVED:
486 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
487 zlog_debug("Ignoring LSA of reserved scope");
488 ospf6_lsa_delete(his);
489 continue;
490 break;
491 }
492
493 if (ntohs(his->header->type) == OSPF6_LSTYPE_AS_EXTERNAL
494 && IS_AREA_STUB(on->ospf6_if->area)) {
495 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
496 zlog_debug(
497 "SeqNumMismatch (E-bit mismatch), discard");
498 ospf6_lsa_delete(his);
499 thread_add_event(master, seqnumber_mismatch, on, 0,
500 NULL);
501 return;
502 }
503
504 mine = ospf6_lsdb_lookup(his->header->type, his->header->id,
505 his->header->adv_router, lsdb);
506 if (mine == NULL) {
507 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
508 zlog_debug("Add request (No database copy)");
509 ospf6_lsdb_add(ospf6_lsa_copy(his), on->request_list);
510 } else if (ospf6_lsa_compare(his, mine) < 0) {
511 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
512 zlog_debug("Add request (Received MoreRecent)");
513 ospf6_lsdb_add(ospf6_lsa_copy(his), on->request_list);
514 } else {
515 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
516 zlog_debug("Discard (Existing MoreRecent)");
517 }
518 ospf6_lsa_delete(his);
519 }
520
521 assert(p == OSPF6_MESSAGE_END(oh));
522
523 /* Increment sequence number */
524 on->dbdesc_seqnum++;
525
526 /* schedule send lsreq */
527 if (on->request_list->count)
528 thread_add_event(master, ospf6_lsreq_send, on, 0,
529 &on->thread_send_lsreq);
530
531 THREAD_OFF(on->thread_send_dbdesc);
532
533 /* More bit check */
534 if (!CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_MBIT)
535 && !CHECK_FLAG(on->dbdesc_bits, OSPF6_DBDESC_MBIT))
536 thread_add_event(master, exchange_done, on, 0, NULL);
537 else {
538 on->thread_send_dbdesc = NULL;
539 thread_add_event(master, ospf6_dbdesc_send_newone, on, 0,
540 &on->thread_send_dbdesc);
541 }
542
543 /* save last received dbdesc */
544 memcpy(&on->dbdesc_last, dbdesc, sizeof(struct ospf6_dbdesc));
545 }
546
547 static void ospf6_dbdesc_recv_slave(struct ospf6_header *oh,
548 struct ospf6_neighbor *on)
549 {
550 struct ospf6_dbdesc *dbdesc;
551 char *p;
552
553 dbdesc = (struct ospf6_dbdesc *)((caddr_t)oh
554 + sizeof(struct ospf6_header));
555
556 if (on->state < OSPF6_NEIGHBOR_INIT) {
557 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
558 zlog_debug("Neighbor state less than Init, ignore");
559 return;
560 }
561
562 switch (on->state) {
563 case OSPF6_NEIGHBOR_TWOWAY:
564 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
565 zlog_debug("Neighbor state is 2-Way, ignore");
566 return;
567
568 case OSPF6_NEIGHBOR_INIT:
569 thread_execute(master, twoway_received, on, 0);
570 if (on->state != OSPF6_NEIGHBOR_EXSTART) {
571 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
572 zlog_debug(
573 "Neighbor state is not ExStart, ignore");
574 return;
575 }
576 /* else fall through to ExStart */
577 /* fallthru */
578 case OSPF6_NEIGHBOR_EXSTART:
579 /* If the neighbor is Master, act as Slave. Schedule
580 negotiation_done
581 and process LSA Headers. Otherwise, ignore this message */
582 if (CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_IBIT)
583 && CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_MBIT)
584 && CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_MSBIT)
585 && ntohs(oh->length)
586 == sizeof(struct ospf6_header)
587 + sizeof(struct ospf6_dbdesc)) {
588 /* set the master/slave bit to slave */
589 UNSET_FLAG(on->dbdesc_bits, OSPF6_DBDESC_MSBIT);
590
591 /* set the DD sequence number to one specified by master
592 */
593 on->dbdesc_seqnum = ntohl(dbdesc->seqnum);
594
595 /* schedule NegotiationDone */
596 thread_execute(master, negotiation_done, on, 0);
597
598 /* Record neighbor options */
599 memcpy(on->options, dbdesc->options,
600 sizeof(on->options));
601 } else {
602 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
603 zlog_debug("Negotiation failed");
604 return;
605 }
606 break;
607
608 case OSPF6_NEIGHBOR_EXCHANGE:
609 if (!memcmp(dbdesc, &on->dbdesc_last,
610 sizeof(struct ospf6_dbdesc))) {
611 /* Duplicated DatabaseDescription causes slave to
612 * retransmit */
613 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
614 zlog_debug(
615 "Duplicated dbdesc causes retransmit");
616 THREAD_OFF(on->thread_send_dbdesc);
617 on->thread_send_dbdesc = NULL;
618 thread_add_event(master, ospf6_dbdesc_send, on, 0,
619 &on->thread_send_dbdesc);
620 return;
621 }
622
623 if (!CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_MSBIT)) {
624 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
625 zlog_debug("Master/Slave bit mismatch");
626 thread_add_event(master, seqnumber_mismatch, on, 0,
627 NULL);
628 return;
629 }
630
631 if (CHECK_FLAG(dbdesc->bits, OSPF6_DBDESC_IBIT)) {
632 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
633 zlog_debug("Initialize bit mismatch");
634 thread_add_event(master, seqnumber_mismatch, on, 0,
635 NULL);
636 return;
637 }
638
639 if (memcmp(on->options, dbdesc->options, sizeof(on->options))) {
640 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
641 zlog_debug("Option field mismatch");
642 thread_add_event(master, seqnumber_mismatch, on, 0,
643 NULL);
644 return;
645 }
646
647 if (ntohl(dbdesc->seqnum) != on->dbdesc_seqnum + 1) {
648 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
649 zlog_debug(
650 "Sequence number mismatch (%#lx expected)",
651 (unsigned long)on->dbdesc_seqnum + 1);
652 thread_add_event(master, seqnumber_mismatch, on, 0,
653 NULL);
654 return;
655 }
656 break;
657
658 case OSPF6_NEIGHBOR_LOADING:
659 case OSPF6_NEIGHBOR_FULL:
660 if (!memcmp(dbdesc, &on->dbdesc_last,
661 sizeof(struct ospf6_dbdesc))) {
662 /* Duplicated DatabaseDescription causes slave to
663 * retransmit */
664 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
665 zlog_debug(
666 "Duplicated dbdesc causes retransmit");
667 THREAD_OFF(on->thread_send_dbdesc);
668 thread_add_event(master, ospf6_dbdesc_send, on, 0,
669 &on->thread_send_dbdesc);
670 return;
671 }
672
673 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
674 zlog_debug("Not duplicate dbdesc in state %s",
675 ospf6_neighbor_state_str[on->state]);
676 thread_add_event(master, seqnumber_mismatch, on, 0, NULL);
677 return;
678
679 default:
680 assert(0);
681 break;
682 }
683
684 /* Process LSA headers */
685 for (p = (char *)((caddr_t)dbdesc + sizeof(struct ospf6_dbdesc));
686 p + sizeof(struct ospf6_lsa_header) <= OSPF6_MESSAGE_END(oh);
687 p += sizeof(struct ospf6_lsa_header)) {
688 struct ospf6_lsa *his, *mine;
689 struct ospf6_lsdb *lsdb = NULL;
690
691 his = ospf6_lsa_create_headeronly((struct ospf6_lsa_header *)p);
692
693 switch (OSPF6_LSA_SCOPE(his->header->type)) {
694 case OSPF6_SCOPE_LINKLOCAL:
695 lsdb = on->ospf6_if->lsdb;
696 break;
697 case OSPF6_SCOPE_AREA:
698 lsdb = on->ospf6_if->area->lsdb;
699 break;
700 case OSPF6_SCOPE_AS:
701 lsdb = on->ospf6_if->area->ospf6->lsdb;
702 break;
703 case OSPF6_SCOPE_RESERVED:
704 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
705 zlog_debug("Ignoring LSA of reserved scope");
706 ospf6_lsa_delete(his);
707 continue;
708 break;
709 }
710
711 if (OSPF6_LSA_SCOPE(his->header->type) == OSPF6_SCOPE_AS
712 && IS_AREA_STUB(on->ospf6_if->area)) {
713 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
714 zlog_debug("E-bit mismatch with LSA Headers");
715 ospf6_lsa_delete(his);
716 thread_add_event(master, seqnumber_mismatch, on, 0,
717 NULL);
718 return;
719 }
720
721 mine = ospf6_lsdb_lookup(his->header->type, his->header->id,
722 his->header->adv_router, lsdb);
723 if (mine == NULL || ospf6_lsa_compare(his, mine) < 0) {
724 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
725 zlog_debug("Add request-list: %s", his->name);
726 ospf6_lsdb_add(ospf6_lsa_copy(his), on->request_list);
727 }
728 ospf6_lsa_delete(his);
729 }
730
731 assert(p == OSPF6_MESSAGE_END(oh));
732
733 /* Set sequence number to Master's */
734 on->dbdesc_seqnum = ntohl(dbdesc->seqnum);
735
736 /* schedule send lsreq */
737 if (on->request_list->count)
738 thread_add_event(master, ospf6_lsreq_send, on, 0,
739 &on->thread_send_lsreq);
740
741 THREAD_OFF(on->thread_send_dbdesc);
742 thread_add_event(master, ospf6_dbdesc_send_newone, on, 0,
743 &on->thread_send_dbdesc);
744
745 /* save last received dbdesc */
746 memcpy(&on->dbdesc_last, dbdesc, sizeof(struct ospf6_dbdesc));
747 }
748
749 static void ospf6_dbdesc_recv(struct in6_addr *src, struct in6_addr *dst,
750 struct ospf6_interface *oi,
751 struct ospf6_header *oh)
752 {
753 struct ospf6_neighbor *on;
754 struct ospf6_dbdesc *dbdesc;
755
756 on = ospf6_neighbor_lookup(oh->router_id, oi);
757 if (on == NULL) {
758 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
759 zlog_debug("Neighbor not found, ignore");
760 return;
761 }
762
763 dbdesc = (struct ospf6_dbdesc *)((caddr_t)oh
764 + sizeof(struct ospf6_header));
765
766 /* Interface MTU check */
767 if (!oi->mtu_ignore && ntohs(dbdesc->ifmtu) != oi->ifmtu) {
768 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
769 zlog_debug("I/F MTU mismatch");
770 return;
771 }
772
773 if (dbdesc->reserved1 || dbdesc->reserved2) {
774 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
775 zlog_debug(
776 "Non-0 reserved field in %s's DbDesc, correct",
777 on->name);
778 dbdesc->reserved1 = 0;
779 dbdesc->reserved2 = 0;
780 }
781
782 oi->db_desc_in++;
783
784 if (ntohl(oh->router_id) < ntohl(ospf6->router_id))
785 ospf6_dbdesc_recv_master(oh, on);
786 else if (ntohl(ospf6->router_id) < ntohl(oh->router_id))
787 ospf6_dbdesc_recv_slave(oh, on);
788 else {
789 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
790 zlog_debug("Can't decide which is master, ignore");
791 }
792 }
793
794 static void ospf6_lsreq_recv(struct in6_addr *src, struct in6_addr *dst,
795 struct ospf6_interface *oi,
796 struct ospf6_header *oh)
797 {
798 struct ospf6_neighbor *on;
799 char *p;
800 struct ospf6_lsreq_entry *e;
801 struct ospf6_lsdb *lsdb = NULL;
802 struct ospf6_lsa *lsa;
803
804 on = ospf6_neighbor_lookup(oh->router_id, oi);
805 if (on == NULL) {
806 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
807 zlog_debug("Neighbor not found, ignore");
808 return;
809 }
810
811 if (on->state != OSPF6_NEIGHBOR_EXCHANGE
812 && on->state != OSPF6_NEIGHBOR_LOADING
813 && on->state != OSPF6_NEIGHBOR_FULL) {
814 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
815 zlog_debug("Neighbor state less than Exchange, ignore");
816 return;
817 }
818
819 oi->ls_req_in++;
820
821 /* Process each request */
822 for (p = (char *)((caddr_t)oh + sizeof(struct ospf6_header));
823 p + sizeof(struct ospf6_lsreq_entry) <= OSPF6_MESSAGE_END(oh);
824 p += sizeof(struct ospf6_lsreq_entry)) {
825 e = (struct ospf6_lsreq_entry *)p;
826
827 switch (OSPF6_LSA_SCOPE(e->type)) {
828 case OSPF6_SCOPE_LINKLOCAL:
829 lsdb = on->ospf6_if->lsdb;
830 break;
831 case OSPF6_SCOPE_AREA:
832 lsdb = on->ospf6_if->area->lsdb;
833 break;
834 case OSPF6_SCOPE_AS:
835 lsdb = on->ospf6_if->area->ospf6->lsdb;
836 break;
837 default:
838 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
839 zlog_debug("Ignoring LSA of reserved scope");
840 continue;
841 break;
842 }
843
844 /* Find database copy */
845 lsa = ospf6_lsdb_lookup(e->type, e->id, e->adv_router, lsdb);
846 if (lsa == NULL) {
847 char id[16], adv_router[16];
848 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV)) {
849 inet_ntop(AF_INET, &e->id, id, sizeof(id));
850 inet_ntop(AF_INET, &e->adv_router, adv_router,
851 sizeof(adv_router));
852 zlog_debug(
853 "Can't find requested [%s Id:%s Adv:%s]",
854 ospf6_lstype_name(e->type), id,
855 adv_router);
856 }
857 thread_add_event(master, bad_lsreq, on, 0, NULL);
858 return;
859 }
860
861 ospf6_lsdb_add(ospf6_lsa_copy(lsa), on->lsupdate_list);
862 }
863
864 assert(p == OSPF6_MESSAGE_END(oh));
865
866 /* schedule send lsupdate */
867 THREAD_OFF(on->thread_send_lsupdate);
868 thread_add_event(master, ospf6_lsupdate_send_neighbor, on, 0,
869 &on->thread_send_lsupdate);
870 }
871
872 /* Verify, that the specified memory area contains exactly N valid IPv6
873 prefixes as specified by RFC5340, A.4.1. */
874 static unsigned ospf6_prefixes_examin(
875 struct ospf6_prefix *current, /* start of buffer */
876 unsigned length,
877 const uint32_t req_num_pfxs /* always compared with the actual number
878 of prefixes */
879 )
880 {
881 uint8_t requested_pfx_bytes;
882 uint32_t real_num_pfxs = 0;
883
884 while (length) {
885 if (length < OSPF6_PREFIX_MIN_SIZE) {
886 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN,
887 RECV))
888 zlog_debug("%s: undersized IPv6 prefix header",
889 __func__);
890 return MSG_NG;
891 }
892 /* safe to look deeper */
893 if (current->prefix_length > IPV6_MAX_BITLEN) {
894 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN,
895 RECV))
896 zlog_debug("%s: invalid PrefixLength (%u bits)",
897 __func__, current->prefix_length);
898 return MSG_NG;
899 }
900 /* covers both fixed- and variable-sized fields */
901 requested_pfx_bytes =
902 OSPF6_PREFIX_MIN_SIZE
903 + OSPF6_PREFIX_SPACE(current->prefix_length);
904 if (requested_pfx_bytes > length) {
905 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN,
906 RECV))
907 zlog_debug("%s: undersized IPv6 prefix",
908 __func__);
909 return MSG_NG;
910 }
911 /* next prefix */
912 length -= requested_pfx_bytes;
913 current = (struct ospf6_prefix *)((caddr_t)current
914 + requested_pfx_bytes);
915 real_num_pfxs++;
916 }
917 if (real_num_pfxs != req_num_pfxs) {
918 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
919 zlog_debug(
920 "%s: IPv6 prefix number mismatch (%u required, %u real)",
921 __func__, req_num_pfxs, real_num_pfxs);
922 return MSG_NG;
923 }
924 return MSG_OK;
925 }
926
927 /* Verify an LSA to have a valid length and dispatch further (where
928 appropriate) to check if the contents, including nested IPv6 prefixes,
929 is properly sized/aligned within the LSA. Note that this function gets
930 LSA type in network byte order, uses in host byte order and passes to
931 ospf6_lstype_name() in network byte order again. */
932 static unsigned ospf6_lsa_examin(struct ospf6_lsa_header *lsah,
933 const uint16_t lsalen,
934 const uint8_t headeronly)
935 {
936 struct ospf6_intra_prefix_lsa *intra_prefix_lsa;
937 struct ospf6_as_external_lsa *as_external_lsa;
938 struct ospf6_link_lsa *link_lsa;
939 unsigned exp_length;
940 uint8_t ltindex;
941 uint16_t lsatype;
942
943 /* In case an additional minimum length constraint is defined for
944 current
945 LSA type, make sure that this constraint is met. */
946 lsatype = ntohs(lsah->type);
947 ltindex = lsatype & OSPF6_LSTYPE_FCODE_MASK;
948 if (ltindex < OSPF6_LSTYPE_SIZE && ospf6_lsa_minlen[ltindex]
949 && lsalen < ospf6_lsa_minlen[ltindex] + OSPF6_LSA_HEADER_SIZE) {
950 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
951 zlog_debug("%s: undersized (%u B) LSA", __func__,
952 lsalen);
953 return MSG_NG;
954 }
955 switch (lsatype) {
956 case OSPF6_LSTYPE_ROUTER:
957 /* RFC5340 A.4.3, LSA header + OSPF6_ROUTER_LSA_MIN_SIZE bytes
958 followed
959 by N>=0 interface descriptions. */
960 if ((lsalen - OSPF6_LSA_HEADER_SIZE - OSPF6_ROUTER_LSA_MIN_SIZE)
961 % OSPF6_ROUTER_LSDESC_FIX_SIZE) {
962 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN,
963 RECV))
964 zlog_debug(
965 "%s: interface description alignment error",
966 __func__);
967 return MSG_NG;
968 }
969 break;
970 case OSPF6_LSTYPE_NETWORK:
971 /* RFC5340 A.4.4, LSA header + OSPF6_NETWORK_LSA_MIN_SIZE bytes
972 followed by N>=0 attached router descriptions. */
973 if ((lsalen - OSPF6_LSA_HEADER_SIZE
974 - OSPF6_NETWORK_LSA_MIN_SIZE)
975 % OSPF6_NETWORK_LSDESC_FIX_SIZE) {
976 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN,
977 RECV))
978 zlog_debug(
979 "%s: router description alignment error",
980 __func__);
981 return MSG_NG;
982 }
983 break;
984 case OSPF6_LSTYPE_INTER_PREFIX:
985 /* RFC5340 A.4.5, LSA header + OSPF6_INTER_PREFIX_LSA_MIN_SIZE
986 bytes
987 followed by 3-4 fields of a single IPv6 prefix. */
988 if (headeronly)
989 break;
990 return ospf6_prefixes_examin(
991 (struct ospf6_prefix
992 *)((caddr_t)lsah + OSPF6_LSA_HEADER_SIZE
993 + OSPF6_INTER_PREFIX_LSA_MIN_SIZE),
994 lsalen - OSPF6_LSA_HEADER_SIZE
995 - OSPF6_INTER_PREFIX_LSA_MIN_SIZE,
996 1);
997 case OSPF6_LSTYPE_INTER_ROUTER:
998 /* RFC5340 A.4.6, fixed-size LSA. */
999 if (lsalen
1000 > OSPF6_LSA_HEADER_SIZE + OSPF6_INTER_ROUTER_LSA_FIX_SIZE) {
1001 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN,
1002 RECV))
1003 zlog_debug("%s: oversized (%u B) LSA", __func__,
1004 lsalen);
1005 return MSG_NG;
1006 }
1007 break;
1008 case OSPF6_LSTYPE_AS_EXTERNAL: /* RFC5340 A.4.7, same as A.4.8. */
1009 case OSPF6_LSTYPE_TYPE_7:
1010 /* RFC5340 A.4.8, LSA header + OSPF6_AS_EXTERNAL_LSA_MIN_SIZE
1011 bytes
1012 followed by 3-4 fields of IPv6 prefix and 3 conditional LSA
1013 fields:
1014 16 bytes of forwarding address, 4 bytes of external route
1015 tag,
1016 4 bytes of referenced link state ID. */
1017 if (headeronly)
1018 break;
1019 as_external_lsa =
1020 (struct ospf6_as_external_lsa
1021 *)((caddr_t)lsah + OSPF6_LSA_HEADER_SIZE);
1022 exp_length =
1023 OSPF6_LSA_HEADER_SIZE + OSPF6_AS_EXTERNAL_LSA_MIN_SIZE;
1024 /* To find out if the last optional field (Referenced Link State
1025 ID) is
1026 assumed in this LSA, we need to access fixed fields of the
1027 IPv6
1028 prefix before ospf6_prefix_examin() confirms its sizing. */
1029 if (exp_length + OSPF6_PREFIX_MIN_SIZE > lsalen) {
1030 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN,
1031 RECV))
1032 zlog_debug("%s: undersized (%u B) LSA header",
1033 __func__, lsalen);
1034 return MSG_NG;
1035 }
1036 /* forwarding address */
1037 if (CHECK_FLAG(as_external_lsa->bits_metric, OSPF6_ASBR_BIT_F))
1038 exp_length += 16;
1039 /* external route tag */
1040 if (CHECK_FLAG(as_external_lsa->bits_metric, OSPF6_ASBR_BIT_T))
1041 exp_length += 4;
1042 /* referenced link state ID */
1043 if (as_external_lsa->prefix.u._prefix_referenced_lstype)
1044 exp_length += 4;
1045 /* All the fixed-size fields (mandatory and optional) must fit.
1046 I.e.,
1047 this check does not include any IPv6 prefix fields. */
1048 if (exp_length > lsalen) {
1049 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN,
1050 RECV))
1051 zlog_debug("%s: undersized (%u B) LSA header",
1052 __func__, lsalen);
1053 return MSG_NG;
1054 }
1055 /* The last call completely covers the remainder (IPv6 prefix).
1056 */
1057 return ospf6_prefixes_examin(
1058 (struct ospf6_prefix
1059 *)((caddr_t)as_external_lsa
1060 + OSPF6_AS_EXTERNAL_LSA_MIN_SIZE),
1061 lsalen - exp_length, 1);
1062 case OSPF6_LSTYPE_LINK:
1063 /* RFC5340 A.4.9, LSA header + OSPF6_LINK_LSA_MIN_SIZE bytes
1064 followed
1065 by N>=0 IPv6 prefix blocks (with N declared beforehand). */
1066 if (headeronly)
1067 break;
1068 link_lsa = (struct ospf6_link_lsa *)((caddr_t)lsah
1069 + OSPF6_LSA_HEADER_SIZE);
1070 return ospf6_prefixes_examin(
1071 (struct ospf6_prefix *)((caddr_t)link_lsa
1072 + OSPF6_LINK_LSA_MIN_SIZE),
1073 lsalen - OSPF6_LSA_HEADER_SIZE
1074 - OSPF6_LINK_LSA_MIN_SIZE,
1075 ntohl(link_lsa->prefix_num) /* 32 bits */
1076 );
1077 case OSPF6_LSTYPE_INTRA_PREFIX:
1078 /* RFC5340 A.4.10, LSA header + OSPF6_INTRA_PREFIX_LSA_MIN_SIZE
1079 bytes
1080 followed by N>=0 IPv6 prefixes (with N declared beforehand).
1081 */
1082 if (headeronly)
1083 break;
1084 intra_prefix_lsa =
1085 (struct ospf6_intra_prefix_lsa
1086 *)((caddr_t)lsah + OSPF6_LSA_HEADER_SIZE);
1087 return ospf6_prefixes_examin(
1088 (struct ospf6_prefix
1089 *)((caddr_t)intra_prefix_lsa
1090 + OSPF6_INTRA_PREFIX_LSA_MIN_SIZE),
1091 lsalen - OSPF6_LSA_HEADER_SIZE
1092 - OSPF6_INTRA_PREFIX_LSA_MIN_SIZE,
1093 ntohs(intra_prefix_lsa->prefix_num) /* 16 bits */
1094 );
1095 }
1096 /* No additional validation is possible for unknown LSA types, which are
1097 themselves valid in OPSFv3, hence the default decision is to accept.
1098 */
1099 return MSG_OK;
1100 }
1101
1102 /* Verify if the provided input buffer is a valid sequence of LSAs. This
1103 includes verification of LSA blocks length/alignment and dispatching
1104 of deeper-level checks. */
1105 static unsigned
1106 ospf6_lsaseq_examin(struct ospf6_lsa_header *lsah, /* start of buffered data */
1107 size_t length, const uint8_t headeronly,
1108 /* When declared_num_lsas is not 0, compare it to the real
1109 number of LSAs
1110 and treat the difference as an error. */
1111 const uint32_t declared_num_lsas)
1112 {
1113 uint32_t counted_lsas = 0;
1114
1115 while (length) {
1116 uint16_t lsalen;
1117 if (length < OSPF6_LSA_HEADER_SIZE) {
1118 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN,
1119 RECV))
1120 zlog_debug(
1121 "%s: undersized (%zu B) trailing (#%u) LSA header",
1122 __func__, length, counted_lsas);
1123 return MSG_NG;
1124 }
1125 /* save on ntohs() calls here and in the LSA validator */
1126 lsalen = OSPF6_LSA_SIZE(lsah);
1127 if (lsalen < OSPF6_LSA_HEADER_SIZE) {
1128 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN,
1129 RECV))
1130 zlog_debug(
1131 "%s: malformed LSA header #%u, declared length is %u B",
1132 __func__, counted_lsas, lsalen);
1133 return MSG_NG;
1134 }
1135 if (headeronly) {
1136 /* less checks here and in ospf6_lsa_examin() */
1137 if (MSG_OK != ospf6_lsa_examin(lsah, lsalen, 1)) {
1138 if (IS_OSPF6_DEBUG_MESSAGE(
1139 OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1140 zlog_debug(
1141 "%s: anomaly in header-only %s LSA #%u",
1142 __func__,
1143 ospf6_lstype_name(lsah->type),
1144 counted_lsas);
1145 return MSG_NG;
1146 }
1147 lsah = (struct ospf6_lsa_header
1148 *)((caddr_t)lsah
1149 + OSPF6_LSA_HEADER_SIZE);
1150 length -= OSPF6_LSA_HEADER_SIZE;
1151 } else {
1152 /* make sure the input buffer is deep enough before
1153 * further checks */
1154 if (lsalen > length) {
1155 if (IS_OSPF6_DEBUG_MESSAGE(
1156 OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1157 zlog_debug(
1158 "%s: anomaly in %s LSA #%u: declared length is %u B, buffered length is %zu B",
1159 __func__,
1160 ospf6_lstype_name(lsah->type),
1161 counted_lsas, lsalen, length);
1162 return MSG_NG;
1163 }
1164 if (MSG_OK != ospf6_lsa_examin(lsah, lsalen, 0)) {
1165 if (IS_OSPF6_DEBUG_MESSAGE(
1166 OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1167 zlog_debug(
1168 "%s: anomaly in %s LSA #%u",
1169 __func__,
1170 ospf6_lstype_name(lsah->type),
1171 counted_lsas);
1172 return MSG_NG;
1173 }
1174 lsah = (struct ospf6_lsa_header *)((caddr_t)lsah
1175 + lsalen);
1176 length -= lsalen;
1177 }
1178 counted_lsas++;
1179 }
1180
1181 if (declared_num_lsas && counted_lsas != declared_num_lsas) {
1182 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1183 zlog_debug(
1184 "%s: #LSAs declared (%u) does not match actual (%u)",
1185 __func__, declared_num_lsas, counted_lsas);
1186 return MSG_NG;
1187 }
1188 return MSG_OK;
1189 }
1190
1191 /* Verify a complete OSPF packet for proper sizing/alignment. */
1192 static unsigned ospf6_packet_examin(struct ospf6_header *oh,
1193 const unsigned bytesonwire)
1194 {
1195 struct ospf6_lsupdate *lsupd;
1196 unsigned test;
1197
1198 /* length, 1st approximation */
1199 if (bytesonwire < OSPF6_HEADER_SIZE) {
1200 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1201 zlog_debug("%s: undersized (%u B) packet", __func__,
1202 bytesonwire);
1203 return MSG_NG;
1204 }
1205 /* Now it is safe to access header fields. */
1206 if (bytesonwire != ntohs(oh->length)) {
1207 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1208 zlog_debug(
1209 "%s: %s packet length error (%u real, %u declared)",
1210 __func__, lookup_msg(ospf6_message_type_str,
1211 oh->type, NULL),
1212 bytesonwire, ntohs(oh->length));
1213 return MSG_NG;
1214 }
1215 /* version check */
1216 if (oh->version != OSPFV3_VERSION) {
1217 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1218 zlog_debug("%s: invalid (%u) protocol version",
1219 __func__, oh->version);
1220 return MSG_NG;
1221 }
1222 /* length, 2nd approximation */
1223 if (oh->type < OSPF6_MESSAGE_TYPE_ALL && ospf6_packet_minlen[oh->type]
1224 && bytesonwire
1225 < OSPF6_HEADER_SIZE + ospf6_packet_minlen[oh->type]) {
1226 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1227 zlog_debug("%s: undersized (%u B) %s packet", __func__,
1228 bytesonwire,
1229 lookup_msg(ospf6_message_type_str, oh->type,
1230 NULL));
1231 return MSG_NG;
1232 }
1233 /* type-specific deeper validation */
1234 switch (oh->type) {
1235 case OSPF6_MESSAGE_TYPE_HELLO:
1236 /* RFC5340 A.3.2, packet header + OSPF6_HELLO_MIN_SIZE bytes
1237 followed
1238 by N>=0 router-IDs. */
1239 if (0
1240 == (bytesonwire - OSPF6_HEADER_SIZE - OSPF6_HELLO_MIN_SIZE)
1241 % 4)
1242 return MSG_OK;
1243 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1244 zlog_debug("%s: alignment error in %s packet", __func__,
1245 lookup_msg(ospf6_message_type_str, oh->type,
1246 NULL));
1247 return MSG_NG;
1248 case OSPF6_MESSAGE_TYPE_DBDESC:
1249 /* RFC5340 A.3.3, packet header + OSPF6_DB_DESC_MIN_SIZE bytes
1250 followed
1251 by N>=0 header-only LSAs. */
1252 test = ospf6_lsaseq_examin(
1253 (struct ospf6_lsa_header *)((caddr_t)oh
1254 + OSPF6_HEADER_SIZE
1255 + OSPF6_DB_DESC_MIN_SIZE),
1256 bytesonwire - OSPF6_HEADER_SIZE
1257 - OSPF6_DB_DESC_MIN_SIZE,
1258 1, 0);
1259 break;
1260 case OSPF6_MESSAGE_TYPE_LSREQ:
1261 /* RFC5340 A.3.4, packet header + N>=0 LS description blocks. */
1262 if (0
1263 == (bytesonwire - OSPF6_HEADER_SIZE - OSPF6_LS_REQ_MIN_SIZE)
1264 % OSPF6_LSREQ_LSDESC_FIX_SIZE)
1265 return MSG_OK;
1266 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1267 zlog_debug("%s: alignment error in %s packet", __func__,
1268 lookup_msg(ospf6_message_type_str, oh->type,
1269 NULL));
1270 return MSG_NG;
1271 case OSPF6_MESSAGE_TYPE_LSUPDATE:
1272 /* RFC5340 A.3.5, packet header + OSPF6_LS_UPD_MIN_SIZE bytes
1273 followed
1274 by N>=0 full LSAs (with N declared beforehand). */
1275 lsupd = (struct ospf6_lsupdate *)((caddr_t)oh
1276 + OSPF6_HEADER_SIZE);
1277 test = ospf6_lsaseq_examin(
1278 (struct ospf6_lsa_header *)((caddr_t)lsupd
1279 + OSPF6_LS_UPD_MIN_SIZE),
1280 bytesonwire - OSPF6_HEADER_SIZE - OSPF6_LS_UPD_MIN_SIZE,
1281 0, ntohl(lsupd->lsa_number) /* 32 bits */
1282 );
1283 break;
1284 case OSPF6_MESSAGE_TYPE_LSACK:
1285 /* RFC5340 A.3.6, packet header + N>=0 header-only LSAs. */
1286 test = ospf6_lsaseq_examin(
1287 (struct ospf6_lsa_header *)((caddr_t)oh
1288 + OSPF6_HEADER_SIZE
1289 + OSPF6_LS_ACK_MIN_SIZE),
1290 bytesonwire - OSPF6_HEADER_SIZE - OSPF6_LS_ACK_MIN_SIZE,
1291 1, 0);
1292 break;
1293 default:
1294 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1295 zlog_debug("%s: invalid (%u) message type", __func__,
1296 oh->type);
1297 return MSG_NG;
1298 }
1299 if (test != MSG_OK
1300 && IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1301 zlog_debug("%s: anomaly in %s packet", __func__,
1302 lookup_msg(ospf6_message_type_str, oh->type, NULL));
1303 return test;
1304 }
1305
1306 /* Verify particular fields of otherwise correct received OSPF packet to
1307 meet the requirements of RFC. */
1308 static int ospf6_rxpacket_examin(struct ospf6_interface *oi,
1309 struct ospf6_header *oh,
1310 const unsigned bytesonwire)
1311 {
1312 char buf[2][INET_ADDRSTRLEN];
1313
1314 if (MSG_OK != ospf6_packet_examin(oh, bytesonwire))
1315 return MSG_NG;
1316
1317 /* Area-ID check */
1318 if (oh->area_id != oi->area->area_id) {
1319 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV)) {
1320 if (oh->area_id == OSPF_AREA_BACKBONE)
1321 zlog_debug(
1322 "%s: Message may be via Virtual Link: not supported",
1323 __func__);
1324 else
1325 zlog_debug(
1326 "%s: Area-ID mismatch (my %s, rcvd %s)",
1327 __func__,
1328 inet_ntop(AF_INET, &oi->area->area_id,
1329 buf[0], INET_ADDRSTRLEN),
1330 inet_ntop(AF_INET, &oh->area_id, buf[1],
1331 INET_ADDRSTRLEN));
1332 }
1333 return MSG_NG;
1334 }
1335
1336 /* Instance-ID check */
1337 if (oh->instance_id != oi->instance_id) {
1338 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1339 zlog_debug("%s: Instance-ID mismatch (my %u, rcvd %u)",
1340 __func__, oi->instance_id, oh->instance_id);
1341 return MSG_NG;
1342 }
1343
1344 /* Router-ID check */
1345 if (oh->router_id == oi->area->ospf6->router_id) {
1346 zlog_warn("%s: Duplicate Router-ID (%s)", __func__,
1347 inet_ntop(AF_INET, &oh->router_id, buf[0],
1348 INET_ADDRSTRLEN));
1349 return MSG_NG;
1350 }
1351 return MSG_OK;
1352 }
1353
1354 static void ospf6_lsupdate_recv(struct in6_addr *src, struct in6_addr *dst,
1355 struct ospf6_interface *oi,
1356 struct ospf6_header *oh)
1357 {
1358 struct ospf6_neighbor *on;
1359 struct ospf6_lsupdate *lsupdate;
1360 char *p;
1361
1362 on = ospf6_neighbor_lookup(oh->router_id, oi);
1363 if (on == NULL) {
1364 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1365 zlog_debug("Neighbor not found, ignore");
1366 return;
1367 }
1368
1369 if (on->state != OSPF6_NEIGHBOR_EXCHANGE
1370 && on->state != OSPF6_NEIGHBOR_LOADING
1371 && on->state != OSPF6_NEIGHBOR_FULL) {
1372 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1373 zlog_debug("Neighbor state less than Exchange, ignore");
1374 return;
1375 }
1376
1377 lsupdate = (struct ospf6_lsupdate *)((caddr_t)oh
1378 + sizeof(struct ospf6_header));
1379
1380 oi->ls_upd_in++;
1381
1382 /* Process LSAs */
1383 for (p = (char *)((caddr_t)lsupdate + sizeof(struct ospf6_lsupdate));
1384 p < OSPF6_MESSAGE_END(oh)
1385 && p + OSPF6_LSA_SIZE(p) <= OSPF6_MESSAGE_END(oh);
1386 p += OSPF6_LSA_SIZE(p)) {
1387 ospf6_receive_lsa(on, (struct ospf6_lsa_header *)p);
1388 }
1389
1390 assert(p == OSPF6_MESSAGE_END(oh));
1391 }
1392
1393 static void ospf6_lsack_recv(struct in6_addr *src, struct in6_addr *dst,
1394 struct ospf6_interface *oi,
1395 struct ospf6_header *oh)
1396 {
1397 struct ospf6_neighbor *on;
1398 char *p;
1399 struct ospf6_lsa *his, *mine;
1400 struct ospf6_lsdb *lsdb = NULL;
1401
1402 assert(oh->type == OSPF6_MESSAGE_TYPE_LSACK);
1403
1404 on = ospf6_neighbor_lookup(oh->router_id, oi);
1405 if (on == NULL) {
1406 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1407 zlog_debug("Neighbor not found, ignore");
1408 return;
1409 }
1410
1411 if (on->state != OSPF6_NEIGHBOR_EXCHANGE
1412 && on->state != OSPF6_NEIGHBOR_LOADING
1413 && on->state != OSPF6_NEIGHBOR_FULL) {
1414 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1415 zlog_debug("Neighbor state less than Exchange, ignore");
1416 return;
1417 }
1418
1419 oi->ls_ack_in++;
1420
1421 for (p = (char *)((caddr_t)oh + sizeof(struct ospf6_header));
1422 p + sizeof(struct ospf6_lsa_header) <= OSPF6_MESSAGE_END(oh);
1423 p += sizeof(struct ospf6_lsa_header)) {
1424 his = ospf6_lsa_create_headeronly((struct ospf6_lsa_header *)p);
1425
1426 switch (OSPF6_LSA_SCOPE(his->header->type)) {
1427 case OSPF6_SCOPE_LINKLOCAL:
1428 lsdb = on->ospf6_if->lsdb;
1429 break;
1430 case OSPF6_SCOPE_AREA:
1431 lsdb = on->ospf6_if->area->lsdb;
1432 break;
1433 case OSPF6_SCOPE_AS:
1434 lsdb = on->ospf6_if->area->ospf6->lsdb;
1435 break;
1436 case OSPF6_SCOPE_RESERVED:
1437 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1438 zlog_debug("Ignoring LSA of reserved scope");
1439 ospf6_lsa_delete(his);
1440 continue;
1441 break;
1442 }
1443
1444 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1445 zlog_debug("%s acknowledged by %s", his->name,
1446 on->name);
1447
1448 /* Find database copy */
1449 mine = ospf6_lsdb_lookup(his->header->type, his->header->id,
1450 his->header->adv_router, lsdb);
1451 if (mine == NULL) {
1452 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1453 zlog_debug("No database copy");
1454 ospf6_lsa_delete(his);
1455 continue;
1456 }
1457
1458 /* Check if the LSA is on his retrans-list */
1459 mine = ospf6_lsdb_lookup(his->header->type, his->header->id,
1460 his->header->adv_router,
1461 on->retrans_list);
1462 if (mine == NULL) {
1463 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1464 zlog_debug("Not on %s's retrans-list",
1465 on->name);
1466 ospf6_lsa_delete(his);
1467 continue;
1468 }
1469
1470 if (ospf6_lsa_compare(his, mine) != 0) {
1471 /* Log this questionable acknowledgement,
1472 and examine the next one. */
1473 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1474 zlog_debug("Questionable acknowledgement");
1475 ospf6_lsa_delete(his);
1476 continue;
1477 }
1478
1479 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV))
1480 zlog_debug(
1481 "Acknowledged, remove from %s's retrans-list",
1482 on->name);
1483
1484 ospf6_decrement_retrans_count(mine);
1485 if (OSPF6_LSA_IS_MAXAGE(mine))
1486 ospf6_maxage_remove(on->ospf6_if->area->ospf6);
1487 ospf6_lsdb_remove(mine, on->retrans_list);
1488 ospf6_lsa_delete(his);
1489 }
1490
1491 assert(p == OSPF6_MESSAGE_END(oh));
1492 }
1493
1494 static uint8_t *recvbuf = NULL;
1495 static uint8_t *sendbuf = NULL;
1496 static unsigned int iobuflen = 0;
1497
1498 int ospf6_iobuf_size(unsigned int size)
1499 {
1500 uint8_t *recvnew, *sendnew;
1501
1502 if (size <= iobuflen)
1503 return iobuflen;
1504
1505 recvnew = XMALLOC(MTYPE_OSPF6_MESSAGE, size);
1506 sendnew = XMALLOC(MTYPE_OSPF6_MESSAGE, size);
1507
1508 if (recvbuf)
1509 XFREE(MTYPE_OSPF6_MESSAGE, recvbuf);
1510 if (sendbuf)
1511 XFREE(MTYPE_OSPF6_MESSAGE, sendbuf);
1512 recvbuf = recvnew;
1513 sendbuf = sendnew;
1514 iobuflen = size;
1515
1516 return iobuflen;
1517 }
1518
1519 void ospf6_message_terminate(void)
1520 {
1521 if (recvbuf) {
1522 XFREE(MTYPE_OSPF6_MESSAGE, recvbuf);
1523 recvbuf = NULL;
1524 }
1525
1526 if (sendbuf) {
1527 XFREE(MTYPE_OSPF6_MESSAGE, sendbuf);
1528 sendbuf = NULL;
1529 }
1530
1531 iobuflen = 0;
1532 }
1533
1534 int ospf6_receive(struct thread *thread)
1535 {
1536 int sockfd;
1537 unsigned int len;
1538 char srcname[64], dstname[64];
1539 struct in6_addr src, dst;
1540 ifindex_t ifindex;
1541 struct iovec iovector[2];
1542 struct ospf6_interface *oi;
1543 struct ospf6_header *oh;
1544
1545 /* add next read thread */
1546 sockfd = THREAD_FD(thread);
1547 thread_add_read(master, ospf6_receive, NULL, sockfd, NULL);
1548
1549 /* initialize */
1550 memset(&src, 0, sizeof(src));
1551 memset(&dst, 0, sizeof(dst));
1552 ifindex = 0;
1553 memset(recvbuf, 0, iobuflen);
1554 iovector[0].iov_base = recvbuf;
1555 iovector[0].iov_len = iobuflen;
1556 iovector[1].iov_base = NULL;
1557 iovector[1].iov_len = 0;
1558
1559 /* receive message */
1560 len = ospf6_recvmsg(&src, &dst, &ifindex, iovector);
1561 if (len > iobuflen) {
1562 flog_err(LIB_ERR_DEVELOPMENT,
1563 "Excess message read");
1564 return 0;
1565 }
1566
1567 oi = ospf6_interface_lookup_by_ifindex(ifindex);
1568 if (oi == NULL || oi->area == NULL
1569 || CHECK_FLAG(oi->flag, OSPF6_INTERFACE_DISABLE)) {
1570 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1571 zlog_debug("Message received on disabled interface");
1572 return 0;
1573 }
1574 if (CHECK_FLAG(oi->flag, OSPF6_INTERFACE_PASSIVE)) {
1575 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
1576 zlog_debug("%s: Ignore message on passive interface %s",
1577 __func__, oi->interface->name);
1578 return 0;
1579 }
1580
1581 oh = (struct ospf6_header *)recvbuf;
1582 if (ospf6_rxpacket_examin(oi, oh, len) != MSG_OK)
1583 return 0;
1584
1585 /* Being here means, that no sizing/alignment issues were detected in
1586 the input packet. This renders the additional checks performed below
1587 and also in the type-specific dispatching functions a dead code,
1588 which can be dismissed in a cleanup-focused review round later. */
1589
1590 /* Log */
1591 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, RECV)) {
1592 inet_ntop(AF_INET6, &src, srcname, sizeof(srcname));
1593 inet_ntop(AF_INET6, &dst, dstname, sizeof(dstname));
1594 zlog_debug("%s received on %s",
1595 lookup_msg(ospf6_message_type_str, oh->type, NULL),
1596 oi->interface->name);
1597 zlog_debug(" src: %s", srcname);
1598 zlog_debug(" dst: %s", dstname);
1599
1600 switch (oh->type) {
1601 case OSPF6_MESSAGE_TYPE_HELLO:
1602 ospf6_hello_print(oh);
1603 break;
1604 case OSPF6_MESSAGE_TYPE_DBDESC:
1605 ospf6_dbdesc_print(oh);
1606 break;
1607 case OSPF6_MESSAGE_TYPE_LSREQ:
1608 ospf6_lsreq_print(oh);
1609 break;
1610 case OSPF6_MESSAGE_TYPE_LSUPDATE:
1611 ospf6_lsupdate_print(oh);
1612 break;
1613 case OSPF6_MESSAGE_TYPE_LSACK:
1614 ospf6_lsack_print(oh);
1615 break;
1616 default:
1617 assert(0);
1618 }
1619 }
1620
1621 switch (oh->type) {
1622 case OSPF6_MESSAGE_TYPE_HELLO:
1623 ospf6_hello_recv(&src, &dst, oi, oh);
1624 break;
1625
1626 case OSPF6_MESSAGE_TYPE_DBDESC:
1627 ospf6_dbdesc_recv(&src, &dst, oi, oh);
1628 break;
1629
1630 case OSPF6_MESSAGE_TYPE_LSREQ:
1631 ospf6_lsreq_recv(&src, &dst, oi, oh);
1632 break;
1633
1634 case OSPF6_MESSAGE_TYPE_LSUPDATE:
1635 ospf6_lsupdate_recv(&src, &dst, oi, oh);
1636 break;
1637
1638 case OSPF6_MESSAGE_TYPE_LSACK:
1639 ospf6_lsack_recv(&src, &dst, oi, oh);
1640 break;
1641
1642 default:
1643 assert(0);
1644 }
1645
1646 return 0;
1647 }
1648
1649 static void ospf6_send(struct in6_addr *src, struct in6_addr *dst,
1650 struct ospf6_interface *oi, struct ospf6_header *oh)
1651 {
1652 unsigned int len;
1653 char srcname[64], dstname[64];
1654 struct iovec iovector[2];
1655
1656 /* initialize */
1657 iovector[0].iov_base = (caddr_t)oh;
1658 iovector[0].iov_len = ntohs(oh->length);
1659 iovector[1].iov_base = NULL;
1660 iovector[1].iov_len = 0;
1661
1662 /* fill OSPF header */
1663 oh->version = OSPFV3_VERSION;
1664 /* message type must be set before */
1665 /* message length must be set before */
1666 oh->router_id = oi->area->ospf6->router_id;
1667 oh->area_id = oi->area->area_id;
1668 /* checksum is calculated by kernel */
1669 oh->instance_id = oi->instance_id;
1670 oh->reserved = 0;
1671
1672 /* Log */
1673 if (IS_OSPF6_DEBUG_MESSAGE(oh->type, SEND)) {
1674 inet_ntop(AF_INET6, dst, dstname, sizeof(dstname));
1675 if (src)
1676 inet_ntop(AF_INET6, src, srcname, sizeof(srcname));
1677 else
1678 memset(srcname, 0, sizeof(srcname));
1679 zlog_debug("%s send on %s",
1680 lookup_msg(ospf6_message_type_str, oh->type, NULL),
1681 oi->interface->name);
1682 zlog_debug(" src: %s", srcname);
1683 zlog_debug(" dst: %s", dstname);
1684
1685 switch (oh->type) {
1686 case OSPF6_MESSAGE_TYPE_HELLO:
1687 ospf6_hello_print(oh);
1688 break;
1689 case OSPF6_MESSAGE_TYPE_DBDESC:
1690 ospf6_dbdesc_print(oh);
1691 break;
1692 case OSPF6_MESSAGE_TYPE_LSREQ:
1693 ospf6_lsreq_print(oh);
1694 break;
1695 case OSPF6_MESSAGE_TYPE_LSUPDATE:
1696 ospf6_lsupdate_print(oh);
1697 break;
1698 case OSPF6_MESSAGE_TYPE_LSACK:
1699 ospf6_lsack_print(oh);
1700 break;
1701 default:
1702 zlog_debug("Unknown message");
1703 assert(0);
1704 break;
1705 }
1706 }
1707
1708 /* send message */
1709 len = ospf6_sendmsg(src, dst, &oi->interface->ifindex, iovector);
1710 if (len != ntohs(oh->length))
1711 flog_err(LIB_ERR_DEVELOPMENT, "Could not send entire message");
1712 }
1713
1714 static uint32_t ospf6_packet_max(struct ospf6_interface *oi)
1715 {
1716 assert(oi->ifmtu > sizeof(struct ip6_hdr));
1717 return oi->ifmtu - (sizeof(struct ip6_hdr));
1718 }
1719
1720 int ospf6_hello_send(struct thread *thread)
1721 {
1722 struct ospf6_interface *oi;
1723 struct ospf6_header *oh;
1724 struct ospf6_hello *hello;
1725 uint8_t *p;
1726 struct listnode *node, *nnode;
1727 struct ospf6_neighbor *on;
1728
1729 oi = (struct ospf6_interface *)THREAD_ARG(thread);
1730 oi->thread_send_hello = (struct thread *)NULL;
1731
1732 if (oi->state <= OSPF6_INTERFACE_DOWN) {
1733 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_HELLO, SEND))
1734 zlog_debug("Unable to send Hello on down interface %s",
1735 oi->interface->name);
1736 return 0;
1737 }
1738
1739 if (iobuflen == 0) {
1740 zlog_debug("Unable to send Hello on interface %s iobuflen is 0",
1741 oi->interface->name);
1742 return 0;
1743 }
1744
1745 /* set next thread */
1746 thread_add_timer(master, ospf6_hello_send, oi, oi->hello_interval,
1747 &oi->thread_send_hello);
1748
1749 memset(sendbuf, 0, iobuflen);
1750 oh = (struct ospf6_header *)sendbuf;
1751 hello = (struct ospf6_hello *)((caddr_t)oh
1752 + sizeof(struct ospf6_header));
1753
1754 hello->interface_id = htonl(oi->interface->ifindex);
1755 hello->priority = oi->priority;
1756 hello->options[0] = oi->area->options[0];
1757 hello->options[1] = oi->area->options[1];
1758 hello->options[2] = oi->area->options[2];
1759 hello->hello_interval = htons(oi->hello_interval);
1760 hello->dead_interval = htons(oi->dead_interval);
1761 hello->drouter = oi->drouter;
1762 hello->bdrouter = oi->bdrouter;
1763
1764 p = (uint8_t *)((caddr_t)hello + sizeof(struct ospf6_hello));
1765
1766 for (ALL_LIST_ELEMENTS(oi->neighbor_list, node, nnode, on)) {
1767 if (on->state < OSPF6_NEIGHBOR_INIT)
1768 continue;
1769
1770 if (p - sendbuf + sizeof(uint32_t) > ospf6_packet_max(oi)) {
1771 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_HELLO,
1772 SEND))
1773 zlog_debug(
1774 "sending Hello message: exceeds I/F MTU");
1775 break;
1776 }
1777
1778 memcpy(p, &on->router_id, sizeof(uint32_t));
1779 p += sizeof(uint32_t);
1780 }
1781
1782 oh->type = OSPF6_MESSAGE_TYPE_HELLO;
1783 oh->length = htons(p - sendbuf);
1784
1785 oi->hello_out++;
1786
1787 ospf6_send(oi->linklocal_addr, &allspfrouters6, oi, oh);
1788 return 0;
1789 }
1790
1791 int ospf6_dbdesc_send(struct thread *thread)
1792 {
1793 struct ospf6_neighbor *on;
1794 struct ospf6_header *oh;
1795 struct ospf6_dbdesc *dbdesc;
1796 uint8_t *p;
1797 struct ospf6_lsa *lsa;
1798 struct in6_addr *dst;
1799
1800 on = (struct ospf6_neighbor *)THREAD_ARG(thread);
1801 on->thread_send_dbdesc = (struct thread *)NULL;
1802
1803 if (on->state < OSPF6_NEIGHBOR_EXSTART) {
1804 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_DBDESC, SEND))
1805 zlog_debug(
1806 "Quit to send DbDesc to neighbor %s state %s",
1807 on->name, ospf6_neighbor_state_str[on->state]);
1808 return 0;
1809 }
1810
1811 /* set next thread if master */
1812 if (CHECK_FLAG(on->dbdesc_bits, OSPF6_DBDESC_MSBIT))
1813 thread_add_timer(master, ospf6_dbdesc_send, on,
1814 on->ospf6_if->rxmt_interval,
1815 &on->thread_send_dbdesc);
1816
1817 memset(sendbuf, 0, iobuflen);
1818 oh = (struct ospf6_header *)sendbuf;
1819 dbdesc = (struct ospf6_dbdesc *)((caddr_t)oh
1820 + sizeof(struct ospf6_header));
1821
1822 /* if this is initial one, initialize sequence number for DbDesc */
1823 if (CHECK_FLAG(on->dbdesc_bits, OSPF6_DBDESC_IBIT)
1824 && (on->dbdesc_seqnum == 0)) {
1825 on->dbdesc_seqnum = monotime(NULL);
1826 }
1827
1828 dbdesc->options[0] = on->ospf6_if->area->options[0];
1829 dbdesc->options[1] = on->ospf6_if->area->options[1];
1830 dbdesc->options[2] = on->ospf6_if->area->options[2];
1831 dbdesc->ifmtu = htons(on->ospf6_if->ifmtu);
1832 dbdesc->bits = on->dbdesc_bits;
1833 dbdesc->seqnum = htonl(on->dbdesc_seqnum);
1834
1835 /* if this is not initial one, set LSA headers in dbdesc */
1836 p = (uint8_t *)((caddr_t)dbdesc + sizeof(struct ospf6_dbdesc));
1837 if (!CHECK_FLAG(on->dbdesc_bits, OSPF6_DBDESC_IBIT)) {
1838 for (ALL_LSDB(on->dbdesc_list, lsa)) {
1839 ospf6_lsa_age_update_to_send(lsa,
1840 on->ospf6_if->transdelay);
1841
1842 /* MTU check */
1843 if (p - sendbuf + sizeof(struct ospf6_lsa_header)
1844 > ospf6_packet_max(on->ospf6_if)) {
1845 ospf6_lsdb_lsa_unlock(lsa);
1846 break;
1847 }
1848 memcpy(p, lsa->header, sizeof(struct ospf6_lsa_header));
1849 p += sizeof(struct ospf6_lsa_header);
1850 }
1851 }
1852
1853 oh->type = OSPF6_MESSAGE_TYPE_DBDESC;
1854 oh->length = htons(p - sendbuf);
1855
1856
1857 if (on->ospf6_if->state == OSPF6_INTERFACE_POINTTOPOINT)
1858 dst = &allspfrouters6;
1859 else
1860 dst = &on->linklocal_addr;
1861
1862 on->ospf6_if->db_desc_out++;
1863
1864 ospf6_send(on->ospf6_if->linklocal_addr, dst, on->ospf6_if, oh);
1865
1866 return 0;
1867 }
1868
1869 int ospf6_dbdesc_send_newone(struct thread *thread)
1870 {
1871 struct ospf6_neighbor *on;
1872 struct ospf6_lsa *lsa;
1873 unsigned int size = 0;
1874
1875 on = (struct ospf6_neighbor *)THREAD_ARG(thread);
1876 ospf6_lsdb_remove_all(on->dbdesc_list);
1877
1878 /* move LSAs from summary_list to dbdesc_list (within neighbor
1879 structure)
1880 so that ospf6_send_dbdesc () can send those LSAs */
1881 size = sizeof(struct ospf6_lsa_header) + sizeof(struct ospf6_dbdesc);
1882 for (ALL_LSDB(on->summary_list, lsa)) {
1883 if (size + sizeof(struct ospf6_lsa_header)
1884 > ospf6_packet_max(on->ospf6_if)) {
1885 ospf6_lsdb_lsa_unlock(lsa);
1886 break;
1887 }
1888
1889 ospf6_lsdb_add(ospf6_lsa_copy(lsa), on->dbdesc_list);
1890 ospf6_lsdb_remove(lsa, on->summary_list);
1891 size += sizeof(struct ospf6_lsa_header);
1892 }
1893
1894 if (on->summary_list->count == 0)
1895 UNSET_FLAG(on->dbdesc_bits, OSPF6_DBDESC_MBIT);
1896
1897 /* If slave, More bit check must be done here */
1898 if (!CHECK_FLAG(on->dbdesc_bits, OSPF6_DBDESC_MSBIT) && /* Slave */
1899 !CHECK_FLAG(on->dbdesc_last.bits, OSPF6_DBDESC_MBIT)
1900 && !CHECK_FLAG(on->dbdesc_bits, OSPF6_DBDESC_MBIT))
1901 thread_add_event(master, exchange_done, on, 0, NULL);
1902
1903 thread_execute(master, ospf6_dbdesc_send, on, 0);
1904 return 0;
1905 }
1906
1907 int ospf6_lsreq_send(struct thread *thread)
1908 {
1909 struct ospf6_neighbor *on;
1910 struct ospf6_header *oh;
1911 struct ospf6_lsreq_entry *e;
1912 uint8_t *p;
1913 struct ospf6_lsa *lsa, *last_req;
1914
1915 on = (struct ospf6_neighbor *)THREAD_ARG(thread);
1916 on->thread_send_lsreq = (struct thread *)NULL;
1917
1918 /* LSReq will be sent only in ExStart or Loading */
1919 if (on->state != OSPF6_NEIGHBOR_EXCHANGE
1920 && on->state != OSPF6_NEIGHBOR_LOADING) {
1921 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_LSREQ, SEND))
1922 zlog_debug("Quit to send LSReq to neighbor %s state %s",
1923 on->name,
1924 ospf6_neighbor_state_str[on->state]);
1925 return 0;
1926 }
1927
1928 /* schedule loading_done if request list is empty */
1929 if (on->request_list->count == 0) {
1930 thread_add_event(master, loading_done, on, 0, NULL);
1931 return 0;
1932 }
1933
1934 memset(sendbuf, 0, iobuflen);
1935 oh = (struct ospf6_header *)sendbuf;
1936 last_req = NULL;
1937
1938 /* set Request entries in lsreq */
1939 p = (uint8_t *)((caddr_t)oh + sizeof(struct ospf6_header));
1940 for (ALL_LSDB(on->request_list, lsa)) {
1941 /* MTU check */
1942 if (p - sendbuf + sizeof(struct ospf6_lsreq_entry)
1943 > ospf6_packet_max(on->ospf6_if)) {
1944 ospf6_lsdb_lsa_unlock(lsa);
1945 break;
1946 }
1947
1948 e = (struct ospf6_lsreq_entry *)p;
1949 e->type = lsa->header->type;
1950 e->id = lsa->header->id;
1951 e->adv_router = lsa->header->adv_router;
1952 p += sizeof(struct ospf6_lsreq_entry);
1953 last_req = lsa;
1954 }
1955
1956 if (last_req != NULL) {
1957 if (on->last_ls_req != NULL) {
1958 ospf6_lsa_unlock(on->last_ls_req);
1959 }
1960 ospf6_lsa_lock(last_req);
1961 on->last_ls_req = last_req;
1962 }
1963
1964 oh->type = OSPF6_MESSAGE_TYPE_LSREQ;
1965 oh->length = htons(p - sendbuf);
1966
1967 on->ospf6_if->ls_req_out++;
1968
1969 if (on->ospf6_if->state == OSPF6_INTERFACE_POINTTOPOINT)
1970 ospf6_send(on->ospf6_if->linklocal_addr, &allspfrouters6,
1971 on->ospf6_if, oh);
1972 else
1973 ospf6_send(on->ospf6_if->linklocal_addr, &on->linklocal_addr,
1974 on->ospf6_if, oh);
1975
1976 /* set next thread */
1977 if (on->request_list->count != 0) {
1978 on->thread_send_lsreq = NULL;
1979 thread_add_timer(master, ospf6_lsreq_send, on,
1980 on->ospf6_if->rxmt_interval,
1981 &on->thread_send_lsreq);
1982 }
1983
1984 return 0;
1985 }
1986
1987 static void ospf6_send_lsupdate(struct ospf6_neighbor *on,
1988 struct ospf6_interface *oi,
1989 struct ospf6_header *oh)
1990 {
1991
1992 if (on) {
1993 on->ospf6_if->ls_upd_out++;
1994
1995 if ((on->ospf6_if->state == OSPF6_INTERFACE_POINTTOPOINT)
1996 || (on->ospf6_if->state == OSPF6_INTERFACE_DR)
1997 || (on->ospf6_if->state == OSPF6_INTERFACE_BDR)) {
1998 ospf6_send(on->ospf6_if->linklocal_addr,
1999 &allspfrouters6, on->ospf6_if, oh);
2000 } else {
2001 ospf6_send(on->ospf6_if->linklocal_addr,
2002 &on->linklocal_addr, on->ospf6_if, oh);
2003 }
2004 } else if (oi) {
2005
2006 oi->ls_upd_out++;
2007
2008 if ((oi->state == OSPF6_INTERFACE_POINTTOPOINT)
2009 || (oi->state == OSPF6_INTERFACE_DR)
2010 || (oi->state == OSPF6_INTERFACE_BDR)) {
2011 ospf6_send(oi->linklocal_addr, &allspfrouters6, oi, oh);
2012 } else {
2013 ospf6_send(oi->linklocal_addr, &alldrouters6, oi, oh);
2014 }
2015 }
2016 }
2017
2018 int ospf6_lsupdate_send_neighbor(struct thread *thread)
2019 {
2020 struct ospf6_neighbor *on;
2021 struct ospf6_header *oh;
2022 struct ospf6_lsupdate *lsupdate;
2023 uint8_t *p;
2024 int lsa_cnt;
2025 struct ospf6_lsa *lsa;
2026
2027 on = (struct ospf6_neighbor *)THREAD_ARG(thread);
2028 on->thread_send_lsupdate = (struct thread *)NULL;
2029
2030 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_LSUPDATE, SEND))
2031 zlog_debug("LSUpdate to neighbor %s", on->name);
2032
2033 if (on->state < OSPF6_NEIGHBOR_EXCHANGE) {
2034 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_LSUPDATE, SEND))
2035 zlog_debug("Quit to send (neighbor state %s)",
2036 ospf6_neighbor_state_str[on->state]);
2037 return 0;
2038 }
2039
2040 memset(sendbuf, 0, iobuflen);
2041 oh = (struct ospf6_header *)sendbuf;
2042 lsupdate = (struct ospf6_lsupdate *)((caddr_t)oh
2043 + sizeof(struct ospf6_header));
2044
2045 p = (uint8_t *)((caddr_t)lsupdate + sizeof(struct ospf6_lsupdate));
2046 lsa_cnt = 0;
2047
2048 /* lsupdate_list lists those LSA which doesn't need to be
2049 retransmitted. remove those from the list */
2050 for (ALL_LSDB(on->lsupdate_list, lsa)) {
2051 /* MTU check */
2052 if ((p - sendbuf + (unsigned int)OSPF6_LSA_SIZE(lsa->header))
2053 > ospf6_packet_max(on->ospf6_if)) {
2054 if (lsa_cnt) {
2055 oh->type = OSPF6_MESSAGE_TYPE_LSUPDATE;
2056 oh->length = htons(p - sendbuf);
2057 lsupdate->lsa_number = htonl(lsa_cnt);
2058
2059 ospf6_send_lsupdate(on, NULL, oh);
2060
2061 memset(sendbuf, 0, iobuflen);
2062 oh = (struct ospf6_header *)sendbuf;
2063 lsupdate = (struct ospf6_lsupdate
2064 *)((caddr_t)oh
2065 + sizeof(struct
2066 ospf6_header));
2067
2068 p = (uint8_t *)((caddr_t)lsupdate
2069 + sizeof(struct
2070 ospf6_lsupdate));
2071 lsa_cnt = 0;
2072 }
2073 }
2074
2075 ospf6_lsa_age_update_to_send(lsa, on->ospf6_if->transdelay);
2076 memcpy(p, lsa->header, OSPF6_LSA_SIZE(lsa->header));
2077 p += OSPF6_LSA_SIZE(lsa->header);
2078 lsa_cnt++;
2079
2080 assert(lsa->lock == 2);
2081 ospf6_lsdb_remove(lsa, on->lsupdate_list);
2082 }
2083
2084 if (lsa_cnt) {
2085 oh->type = OSPF6_MESSAGE_TYPE_LSUPDATE;
2086 oh->length = htons(p - sendbuf);
2087 lsupdate->lsa_number = htonl(lsa_cnt);
2088 ospf6_send_lsupdate(on, NULL, oh);
2089 }
2090
2091 /* The addresses used for retransmissions are different from those sent
2092 the
2093 first time and so we need to separate them here.
2094 */
2095 memset(sendbuf, 0, iobuflen);
2096 oh = (struct ospf6_header *)sendbuf;
2097 lsupdate = (struct ospf6_lsupdate *)((caddr_t)oh
2098 + sizeof(struct ospf6_header));
2099 p = (uint8_t *)((caddr_t)lsupdate + sizeof(struct ospf6_lsupdate));
2100 lsa_cnt = 0;
2101
2102 for (ALL_LSDB(on->retrans_list, lsa)) {
2103 /* MTU check */
2104 if ((p - sendbuf + (unsigned int)OSPF6_LSA_SIZE(lsa->header))
2105 > ospf6_packet_max(on->ospf6_if)) {
2106 if (lsa_cnt) {
2107 oh->type = OSPF6_MESSAGE_TYPE_LSUPDATE;
2108 oh->length = htons(p - sendbuf);
2109 lsupdate->lsa_number = htonl(lsa_cnt);
2110
2111 if (on->ospf6_if->state
2112 == OSPF6_INTERFACE_POINTTOPOINT) {
2113 ospf6_send(on->ospf6_if->linklocal_addr,
2114 &allspfrouters6,
2115 on->ospf6_if, oh);
2116 } else {
2117 ospf6_send(on->ospf6_if->linklocal_addr,
2118 &on->linklocal_addr,
2119 on->ospf6_if, oh);
2120 }
2121
2122 memset(sendbuf, 0, iobuflen);
2123 oh = (struct ospf6_header *)sendbuf;
2124 lsupdate = (struct ospf6_lsupdate
2125 *)((caddr_t)oh
2126 + sizeof(struct
2127 ospf6_header));
2128 p = (uint8_t *)((caddr_t)lsupdate
2129 + sizeof(struct
2130 ospf6_lsupdate));
2131 lsa_cnt = 0;
2132 }
2133 }
2134
2135 ospf6_lsa_age_update_to_send(lsa, on->ospf6_if->transdelay);
2136 memcpy(p, lsa->header, OSPF6_LSA_SIZE(lsa->header));
2137 p += OSPF6_LSA_SIZE(lsa->header);
2138 lsa_cnt++;
2139 }
2140
2141 if (lsa_cnt) {
2142 oh->type = OSPF6_MESSAGE_TYPE_LSUPDATE;
2143 oh->length = htons(p - sendbuf);
2144 lsupdate->lsa_number = htonl(lsa_cnt);
2145
2146 if (on->ospf6_if->state == OSPF6_INTERFACE_POINTTOPOINT)
2147 ospf6_send(on->ospf6_if->linklocal_addr,
2148 &allspfrouters6, on->ospf6_if, oh);
2149 else
2150 ospf6_send(on->ospf6_if->linklocal_addr,
2151 &on->linklocal_addr, on->ospf6_if, oh);
2152 }
2153
2154 if (on->lsupdate_list->count != 0) {
2155 on->thread_send_lsupdate = NULL;
2156 thread_add_event(master, ospf6_lsupdate_send_neighbor, on, 0,
2157 &on->thread_send_lsupdate);
2158 } else if (on->retrans_list->count != 0) {
2159 on->thread_send_lsupdate = NULL;
2160 thread_add_timer(master, ospf6_lsupdate_send_neighbor, on,
2161 on->ospf6_if->rxmt_interval,
2162 &on->thread_send_lsupdate);
2163 }
2164 return 0;
2165 }
2166
2167 int ospf6_lsupdate_send_neighbor_now(struct ospf6_neighbor *on,
2168 struct ospf6_lsa *lsa)
2169 {
2170 struct ospf6_header *oh;
2171 struct ospf6_lsupdate *lsupdate;
2172 uint8_t *p;
2173 int lsa_cnt = 0;
2174
2175 memset(sendbuf, 0, iobuflen);
2176 oh = (struct ospf6_header *)sendbuf;
2177 lsupdate = (struct ospf6_lsupdate *)((caddr_t)oh
2178 + sizeof(struct ospf6_header));
2179
2180 p = (uint8_t *)((caddr_t)lsupdate + sizeof(struct ospf6_lsupdate));
2181 ospf6_lsa_age_update_to_send(lsa, on->ospf6_if->transdelay);
2182 memcpy(p, lsa->header, OSPF6_LSA_SIZE(lsa->header));
2183 p += OSPF6_LSA_SIZE(lsa->header);
2184 lsa_cnt++;
2185
2186 oh->type = OSPF6_MESSAGE_TYPE_LSUPDATE;
2187 oh->length = htons(p - sendbuf);
2188 lsupdate->lsa_number = htonl(lsa_cnt);
2189
2190 if (IS_OSPF6_DEBUG_FLOODING
2191 || IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_LSUPDATE, SEND))
2192 zlog_debug("%s: Send lsupdate with lsa %s (age %u)",
2193 __PRETTY_FUNCTION__, lsa->name,
2194 ntohs(lsa->header->age));
2195
2196 ospf6_send_lsupdate(on, NULL, oh);
2197
2198 return 0;
2199 }
2200
2201 int ospf6_lsupdate_send_interface(struct thread *thread)
2202 {
2203 struct ospf6_interface *oi;
2204 struct ospf6_header *oh;
2205 struct ospf6_lsupdate *lsupdate;
2206 uint8_t *p;
2207 int lsa_cnt;
2208 struct ospf6_lsa *lsa;
2209
2210 oi = (struct ospf6_interface *)THREAD_ARG(thread);
2211 oi->thread_send_lsupdate = (struct thread *)NULL;
2212
2213 if (oi->state <= OSPF6_INTERFACE_WAITING) {
2214 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_LSUPDATE, SEND))
2215 zlog_debug(
2216 "Quit to send LSUpdate to interface %s state %s",
2217 oi->interface->name,
2218 ospf6_interface_state_str[oi->state]);
2219 return 0;
2220 }
2221
2222 /* if we have nothing to send, return */
2223 if (oi->lsupdate_list->count == 0)
2224 return 0;
2225
2226 memset(sendbuf, 0, iobuflen);
2227 oh = (struct ospf6_header *)sendbuf;
2228 lsupdate = (struct ospf6_lsupdate *)((caddr_t)oh
2229 + sizeof(struct ospf6_header));
2230
2231 p = (uint8_t *)((caddr_t)lsupdate + sizeof(struct ospf6_lsupdate));
2232 lsa_cnt = 0;
2233
2234 for (ALL_LSDB(oi->lsupdate_list, lsa)) {
2235 /* MTU check */
2236 if ((p - sendbuf + ((unsigned int)OSPF6_LSA_SIZE(lsa->header)))
2237 > ospf6_packet_max(oi)) {
2238 if (lsa_cnt) {
2239 oh->type = OSPF6_MESSAGE_TYPE_LSUPDATE;
2240 oh->length = htons(p - sendbuf);
2241 lsupdate->lsa_number = htonl(lsa_cnt);
2242
2243 ospf6_send_lsupdate(NULL, oi, oh);
2244 if (IS_OSPF6_DEBUG_MESSAGE(
2245 OSPF6_MESSAGE_TYPE_LSUPDATE, SEND))
2246 zlog_debug("%s: LSUpdate length %d",
2247 __PRETTY_FUNCTION__,
2248 ntohs(oh->length));
2249
2250 memset(sendbuf, 0, iobuflen);
2251 oh = (struct ospf6_header *)sendbuf;
2252 lsupdate = (struct ospf6_lsupdate
2253 *)((caddr_t)oh
2254 + sizeof(struct
2255 ospf6_header));
2256
2257 p = (uint8_t *)((caddr_t)lsupdate
2258 + sizeof(struct
2259 ospf6_lsupdate));
2260 lsa_cnt = 0;
2261 }
2262 }
2263
2264 ospf6_lsa_age_update_to_send(lsa, oi->transdelay);
2265 memcpy(p, lsa->header, OSPF6_LSA_SIZE(lsa->header));
2266 p += OSPF6_LSA_SIZE(lsa->header);
2267 lsa_cnt++;
2268
2269 assert(lsa->lock == 2);
2270 ospf6_lsdb_remove(lsa, oi->lsupdate_list);
2271 }
2272
2273 if (lsa_cnt) {
2274 oh->type = OSPF6_MESSAGE_TYPE_LSUPDATE;
2275 oh->length = htons(p - sendbuf);
2276 lsupdate->lsa_number = htonl(lsa_cnt);
2277
2278 ospf6_send_lsupdate(NULL, oi, oh);
2279 }
2280
2281 if (oi->lsupdate_list->count > 0) {
2282 oi->thread_send_lsupdate = NULL;
2283 thread_add_event(master, ospf6_lsupdate_send_interface, oi, 0,
2284 &oi->thread_send_lsupdate);
2285 }
2286
2287 return 0;
2288 }
2289
2290 int ospf6_lsack_send_neighbor(struct thread *thread)
2291 {
2292 struct ospf6_neighbor *on;
2293 struct ospf6_header *oh;
2294 uint8_t *p;
2295 struct ospf6_lsa *lsa;
2296 int lsa_cnt = 0;
2297
2298 on = (struct ospf6_neighbor *)THREAD_ARG(thread);
2299 on->thread_send_lsack = (struct thread *)NULL;
2300
2301 if (on->state < OSPF6_NEIGHBOR_EXCHANGE) {
2302 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_LSACK, SEND))
2303 zlog_debug("Quit to send LSAck to neighbor %s state %s",
2304 on->name,
2305 ospf6_neighbor_state_str[on->state]);
2306 return 0;
2307 }
2308
2309 /* if we have nothing to send, return */
2310 if (on->lsack_list->count == 0)
2311 return 0;
2312
2313 memset(sendbuf, 0, iobuflen);
2314 oh = (struct ospf6_header *)sendbuf;
2315
2316 p = (uint8_t *)((caddr_t)oh + sizeof(struct ospf6_header));
2317
2318 for (ALL_LSDB(on->lsack_list, lsa)) {
2319 /* MTU check */
2320 if (p - sendbuf + sizeof(struct ospf6_lsa_header)
2321 > ospf6_packet_max(on->ospf6_if)) {
2322 /* if we run out of packet size/space here,
2323 better to try again soon. */
2324 if (lsa_cnt) {
2325 oh->type = OSPF6_MESSAGE_TYPE_LSACK;
2326 oh->length = htons(p - sendbuf);
2327
2328 on->ospf6_if->ls_ack_out++;
2329
2330 ospf6_send(on->ospf6_if->linklocal_addr,
2331 &on->linklocal_addr, on->ospf6_if,
2332 oh);
2333
2334 memset(sendbuf, 0, iobuflen);
2335 oh = (struct ospf6_header *)sendbuf;
2336 p = (uint8_t *)((caddr_t)oh
2337 + sizeof(struct ospf6_header));
2338 lsa_cnt = 0;
2339 }
2340 }
2341
2342 ospf6_lsa_age_update_to_send(lsa, on->ospf6_if->transdelay);
2343 memcpy(p, lsa->header, sizeof(struct ospf6_lsa_header));
2344 p += sizeof(struct ospf6_lsa_header);
2345
2346 assert(lsa->lock == 2);
2347 ospf6_lsdb_remove(lsa, on->lsack_list);
2348 lsa_cnt++;
2349 }
2350
2351 if (lsa_cnt) {
2352 oh->type = OSPF6_MESSAGE_TYPE_LSACK;
2353 oh->length = htons(p - sendbuf);
2354
2355 on->ospf6_if->ls_ack_out++;
2356
2357 ospf6_send(on->ospf6_if->linklocal_addr, &on->linklocal_addr,
2358 on->ospf6_if, oh);
2359 }
2360
2361 if (on->lsack_list->count > 0)
2362 thread_add_event(master, ospf6_lsack_send_neighbor, on, 0,
2363 &on->thread_send_lsack);
2364
2365 return 0;
2366 }
2367
2368 int ospf6_lsack_send_interface(struct thread *thread)
2369 {
2370 struct ospf6_interface *oi;
2371 struct ospf6_header *oh;
2372 uint8_t *p;
2373 struct ospf6_lsa *lsa;
2374 int lsa_cnt = 0;
2375
2376 oi = (struct ospf6_interface *)THREAD_ARG(thread);
2377 oi->thread_send_lsack = (struct thread *)NULL;
2378
2379 if (oi->state <= OSPF6_INTERFACE_WAITING) {
2380 if (IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_LSACK, SEND))
2381 zlog_debug(
2382 "Quit to send LSAck to interface %s state %s",
2383 oi->interface->name,
2384 ospf6_interface_state_str[oi->state]);
2385 return 0;
2386 }
2387
2388 /* if we have nothing to send, return */
2389 if (oi->lsack_list->count == 0)
2390 return 0;
2391
2392 memset(sendbuf, 0, iobuflen);
2393 oh = (struct ospf6_header *)sendbuf;
2394
2395 p = (uint8_t *)((caddr_t)oh + sizeof(struct ospf6_header));
2396
2397 for (ALL_LSDB(oi->lsack_list, lsa)) {
2398 /* MTU check */
2399 if (p - sendbuf + sizeof(struct ospf6_lsa_header)
2400 > ospf6_packet_max(oi)) {
2401 /* if we run out of packet size/space here,
2402 better to try again soon. */
2403 THREAD_OFF(oi->thread_send_lsack);
2404 thread_add_event(master, ospf6_lsack_send_interface, oi,
2405 0, &oi->thread_send_lsack);
2406
2407 ospf6_lsdb_lsa_unlock(lsa);
2408 break;
2409 }
2410
2411 ospf6_lsa_age_update_to_send(lsa, oi->transdelay);
2412 memcpy(p, lsa->header, sizeof(struct ospf6_lsa_header));
2413 p += sizeof(struct ospf6_lsa_header);
2414
2415 assert(lsa->lock == 2);
2416 ospf6_lsdb_remove(lsa, oi->lsack_list);
2417 lsa_cnt++;
2418 }
2419
2420 if (lsa_cnt) {
2421 oh->type = OSPF6_MESSAGE_TYPE_LSACK;
2422 oh->length = htons(p - sendbuf);
2423
2424 if ((oi->state == OSPF6_INTERFACE_POINTTOPOINT)
2425 || (oi->state == OSPF6_INTERFACE_DR)
2426 || (oi->state == OSPF6_INTERFACE_BDR))
2427 ospf6_send(oi->linklocal_addr, &allspfrouters6, oi, oh);
2428 else
2429 ospf6_send(oi->linklocal_addr, &alldrouters6, oi, oh);
2430 }
2431
2432 if (oi->lsack_list->count > 0)
2433 thread_add_event(master, ospf6_lsack_send_interface, oi, 0,
2434 &oi->thread_send_lsack);
2435
2436 return 0;
2437 }
2438
2439
2440 /* Commands */
2441 DEFUN (debug_ospf6_message,
2442 debug_ospf6_message_cmd,
2443 "debug ospf6 message <unknown|hello|dbdesc|lsreq|lsupdate|lsack|all> [<send|recv>]",
2444 DEBUG_STR
2445 OSPF6_STR
2446 "Debug OSPFv3 message\n"
2447 "Debug Unknown message\n"
2448 "Debug Hello message\n"
2449 "Debug Database Description message\n"
2450 "Debug Link State Request message\n"
2451 "Debug Link State Update message\n"
2452 "Debug Link State Acknowledgement message\n"
2453 "Debug All message\n"
2454 "Debug only sending message\n"
2455 "Debug only receiving message\n")
2456 {
2457 int idx_packet = 3;
2458 int idx_send_recv = 4;
2459 unsigned char level = 0;
2460 int type = 0;
2461 int i;
2462
2463 /* check type */
2464 if (!strncmp(argv[idx_packet]->arg, "u", 1))
2465 type = OSPF6_MESSAGE_TYPE_UNKNOWN;
2466 else if (!strncmp(argv[idx_packet]->arg, "h", 1))
2467 type = OSPF6_MESSAGE_TYPE_HELLO;
2468 else if (!strncmp(argv[idx_packet]->arg, "d", 1))
2469 type = OSPF6_MESSAGE_TYPE_DBDESC;
2470 else if (!strncmp(argv[idx_packet]->arg, "lsr", 3))
2471 type = OSPF6_MESSAGE_TYPE_LSREQ;
2472 else if (!strncmp(argv[idx_packet]->arg, "lsu", 3))
2473 type = OSPF6_MESSAGE_TYPE_LSUPDATE;
2474 else if (!strncmp(argv[idx_packet]->arg, "lsa", 3))
2475 type = OSPF6_MESSAGE_TYPE_LSACK;
2476 else if (!strncmp(argv[idx_packet]->arg, "a", 1))
2477 type = OSPF6_MESSAGE_TYPE_ALL;
2478
2479 if (argc == 4)
2480 level = OSPF6_DEBUG_MESSAGE_SEND | OSPF6_DEBUG_MESSAGE_RECV;
2481 else if (!strncmp(argv[idx_send_recv]->arg, "s", 1))
2482 level = OSPF6_DEBUG_MESSAGE_SEND;
2483 else if (!strncmp(argv[idx_send_recv]->arg, "r", 1))
2484 level = OSPF6_DEBUG_MESSAGE_RECV;
2485
2486 if (type == OSPF6_MESSAGE_TYPE_ALL) {
2487 for (i = 0; i < 6; i++)
2488 OSPF6_DEBUG_MESSAGE_ON(i, level);
2489 } else
2490 OSPF6_DEBUG_MESSAGE_ON(type, level);
2491
2492 return CMD_SUCCESS;
2493 }
2494
2495 DEFUN (no_debug_ospf6_message,
2496 no_debug_ospf6_message_cmd,
2497 "no debug ospf6 message <unknown|hello|dbdesc|lsreq|lsupdate|lsack|all> [<send|recv>]",
2498 NO_STR
2499 DEBUG_STR
2500 OSPF6_STR
2501 "Debug OSPFv3 message\n"
2502 "Debug Unknown message\n"
2503 "Debug Hello message\n"
2504 "Debug Database Description message\n"
2505 "Debug Link State Request message\n"
2506 "Debug Link State Update message\n"
2507 "Debug Link State Acknowledgement message\n"
2508 "Debug All message\n"
2509 "Debug only sending message\n"
2510 "Debug only receiving message\n")
2511 {
2512 int idx_packet = 4;
2513 int idx_send_recv = 5;
2514 unsigned char level = 0;
2515 int type = 0;
2516 int i;
2517
2518 /* check type */
2519 if (!strncmp(argv[idx_packet]->arg, "u", 1))
2520 type = OSPF6_MESSAGE_TYPE_UNKNOWN;
2521 else if (!strncmp(argv[idx_packet]->arg, "h", 1))
2522 type = OSPF6_MESSAGE_TYPE_HELLO;
2523 else if (!strncmp(argv[idx_packet]->arg, "d", 1))
2524 type = OSPF6_MESSAGE_TYPE_DBDESC;
2525 else if (!strncmp(argv[idx_packet]->arg, "lsr", 3))
2526 type = OSPF6_MESSAGE_TYPE_LSREQ;
2527 else if (!strncmp(argv[idx_packet]->arg, "lsu", 3))
2528 type = OSPF6_MESSAGE_TYPE_LSUPDATE;
2529 else if (!strncmp(argv[idx_packet]->arg, "lsa", 3))
2530 type = OSPF6_MESSAGE_TYPE_LSACK;
2531 else if (!strncmp(argv[idx_packet]->arg, "a", 1))
2532 type = OSPF6_MESSAGE_TYPE_ALL;
2533
2534 if (argc == 5)
2535 level = OSPF6_DEBUG_MESSAGE_SEND | OSPF6_DEBUG_MESSAGE_RECV;
2536 else if (!strncmp(argv[idx_send_recv]->arg, "s", 1))
2537 level = OSPF6_DEBUG_MESSAGE_SEND;
2538 else if (!strncmp(argv[idx_send_recv]->arg, "r", 1))
2539 level = OSPF6_DEBUG_MESSAGE_RECV;
2540
2541 if (type == OSPF6_MESSAGE_TYPE_ALL) {
2542 for (i = 0; i < 6; i++)
2543 OSPF6_DEBUG_MESSAGE_OFF(i, level);
2544 } else
2545 OSPF6_DEBUG_MESSAGE_OFF(type, level);
2546
2547 return CMD_SUCCESS;
2548 }
2549
2550
2551 int config_write_ospf6_debug_message(struct vty *vty)
2552 {
2553 const char *type_str[] = {"unknown", "hello", "dbdesc",
2554 "lsreq", "lsupdate", "lsack"};
2555 unsigned char s = 0, r = 0;
2556 int i;
2557
2558 for (i = 0; i < 6; i++) {
2559 if (IS_OSPF6_DEBUG_MESSAGE(i, SEND))
2560 s |= 1 << i;
2561 if (IS_OSPF6_DEBUG_MESSAGE(i, RECV))
2562 r |= 1 << i;
2563 }
2564
2565 if (s == 0x3f && r == 0x3f) {
2566 vty_out(vty, "debug ospf6 message all\n");
2567 return 0;
2568 }
2569
2570 if (s == 0x3f && r == 0) {
2571 vty_out(vty, "debug ospf6 message all send\n");
2572 return 0;
2573 } else if (s == 0 && r == 0x3f) {
2574 vty_out(vty, "debug ospf6 message all recv\n");
2575 return 0;
2576 }
2577
2578 /* Unknown message is logged by default */
2579 if (!IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, SEND)
2580 && !IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
2581 vty_out(vty, "no debug ospf6 message unknown\n");
2582 else if (!IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, SEND))
2583 vty_out(vty, "no debug ospf6 message unknown send\n");
2584 else if (!IS_OSPF6_DEBUG_MESSAGE(OSPF6_MESSAGE_TYPE_UNKNOWN, RECV))
2585 vty_out(vty, "no debug ospf6 message unknown recv\n");
2586
2587 for (i = 1; i < 6; i++) {
2588 if (IS_OSPF6_DEBUG_MESSAGE(i, SEND)
2589 && IS_OSPF6_DEBUG_MESSAGE(i, RECV))
2590 vty_out(vty, "debug ospf6 message %s\n", type_str[i]);
2591 else if (IS_OSPF6_DEBUG_MESSAGE(i, SEND))
2592 vty_out(vty, "debug ospf6 message %s send\n",
2593 type_str[i]);
2594 else if (IS_OSPF6_DEBUG_MESSAGE(i, RECV))
2595 vty_out(vty, "debug ospf6 message %s recv\n",
2596 type_str[i]);
2597 }
2598
2599 return 0;
2600 }
2601
2602 void install_element_ospf6_debug_message(void)
2603 {
2604 install_element(ENABLE_NODE, &debug_ospf6_message_cmd);
2605 install_element(ENABLE_NODE, &no_debug_ospf6_message_cmd);
2606 install_element(CONFIG_NODE, &debug_ospf6_message_cmd);
2607 install_element(CONFIG_NODE, &no_debug_ospf6_message_cmd);
2608 }
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