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fabricd: never flood back through the incoming interface
[mirror_frr.git] / isisd / isis_lsp.c
1 /*
2 * IS-IS Rout(e)ing protocol - isis_lsp.c
3 * LSP processing
4 *
5 * Copyright (C) 2001,2002 Sampo Saaristo
6 * Tampere University of Technology
7 * Institute of Communications Engineering
8 * Copyright (C) 2013-2015 Christian Franke <chris@opensourcerouting.org>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; see the file COPYING; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25 #include <zebra.h>
26
27 #include "linklist.h"
28 #include "thread.h"
29 #include "vty.h"
30 #include "stream.h"
31 #include "memory.h"
32 #include "log.h"
33 #include "prefix.h"
34 #include "command.h"
35 #include "hash.h"
36 #include "if.h"
37 #include "checksum.h"
38 #include "md5.h"
39 #include "table.h"
40 #include "srcdest_table.h"
41 #include "lib_errors.h"
42
43 #include "isisd/dict.h"
44 #include "isisd/isis_constants.h"
45 #include "isisd/isis_common.h"
46 #include "isisd/isis_flags.h"
47 #include "isisd/isis_circuit.h"
48 #include "isisd/isisd.h"
49 #include "isisd/isis_lsp.h"
50 #include "isisd/isis_pdu.h"
51 #include "isisd/isis_dynhn.h"
52 #include "isisd/isis_misc.h"
53 #include "isisd/isis_csm.h"
54 #include "isisd/isis_adjacency.h"
55 #include "isisd/isis_spf.h"
56 #include "isisd/isis_te.h"
57 #include "isisd/isis_mt.h"
58 #include "isisd/isis_tlvs.h"
59 #include "isisd/fabricd.h"
60 #include "isisd/isis_tx_queue.h"
61
62 static int lsp_refresh(struct thread *thread);
63 static int lsp_l1_refresh_pseudo(struct thread *thread);
64 static int lsp_l2_refresh_pseudo(struct thread *thread);
65
66 int lsp_id_cmp(uint8_t *id1, uint8_t *id2)
67 {
68 return memcmp(id1, id2, ISIS_SYS_ID_LEN + 2);
69 }
70
71 dict_t *lsp_db_init(void)
72 {
73 dict_t *dict;
74
75 dict = dict_create(DICTCOUNT_T_MAX, (dict_comp_t)lsp_id_cmp);
76
77 return dict;
78 }
79
80 struct isis_lsp *lsp_search(uint8_t *id, dict_t *lspdb)
81 {
82 dnode_t *node;
83
84 #ifdef EXTREME_DEBUG
85 dnode_t *dn;
86
87 zlog_debug("searching db");
88 for (dn = dict_first(lspdb); dn; dn = dict_next(lspdb, dn)) {
89 zlog_debug("%s\t%pX",
90 rawlspid_print((uint8_t *)dnode_getkey(dn)),
91 dnode_get(dn));
92 }
93 #endif /* EXTREME DEBUG */
94
95 node = dict_lookup(lspdb, id);
96
97 if (node)
98 return (struct isis_lsp *)dnode_get(node);
99
100 return NULL;
101 }
102
103 static void lsp_clear_data(struct isis_lsp *lsp)
104 {
105 if (!lsp)
106 return;
107
108 isis_free_tlvs(lsp->tlvs);
109 lsp->tlvs = NULL;
110 }
111
112 static void lsp_remove_frags(struct list *frags, dict_t *lspdb);
113
114 static void lsp_destroy(struct isis_lsp *lsp)
115 {
116 struct listnode *cnode;
117 struct isis_circuit *circuit;
118
119 if (!lsp)
120 return;
121
122 for (ALL_LIST_ELEMENTS_RO(lsp->area->circuit_list, cnode, circuit))
123 isis_tx_queue_del(circuit->tx_queue, lsp);
124
125 ISIS_FLAGS_CLEAR_ALL(lsp->SSNflags);
126
127 lsp_clear_data(lsp);
128
129 if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) {
130 if (lsp->lspu.frags) {
131 lsp_remove_frags(lsp->lspu.frags,
132 lsp->area->lspdb[lsp->level - 1]);
133 list_delete(&lsp->lspu.frags);
134 }
135 } else {
136 if (lsp->lspu.zero_lsp
137 && lsp->lspu.zero_lsp->lspu.frags) {
138 listnode_delete(lsp->lspu.zero_lsp->lspu.frags, lsp);
139 }
140 }
141
142 isis_spf_schedule(lsp->area, lsp->level);
143
144 if (lsp->pdu)
145 stream_free(lsp->pdu);
146 XFREE(MTYPE_ISIS_LSP, lsp);
147 }
148
149 void lsp_db_destroy(dict_t *lspdb)
150 {
151 dnode_t *dnode, *next;
152 struct isis_lsp *lsp;
153
154 dnode = dict_first(lspdb);
155 while (dnode) {
156 next = dict_next(lspdb, dnode);
157 lsp = dnode_get(dnode);
158 lsp_destroy(lsp);
159 dict_delete_free(lspdb, dnode);
160 dnode = next;
161 }
162
163 dict_free(lspdb);
164
165 return;
166 }
167
168 /*
169 * Remove all the frags belonging to the given lsp
170 */
171 static void lsp_remove_frags(struct list *frags, dict_t *lspdb)
172 {
173 dnode_t *dnode;
174 struct listnode *lnode, *lnnode;
175 struct isis_lsp *lsp;
176
177 for (ALL_LIST_ELEMENTS(frags, lnode, lnnode, lsp)) {
178 dnode = dict_lookup(lspdb, lsp->hdr.lsp_id);
179 lsp_destroy(lsp);
180 dnode_destroy(dict_delete(lspdb, dnode));
181 }
182 }
183
184 void lsp_search_and_destroy(uint8_t *id, dict_t *lspdb)
185 {
186 dnode_t *node;
187 struct isis_lsp *lsp;
188
189 node = dict_lookup(lspdb, id);
190 if (node) {
191 node = dict_delete(lspdb, node);
192 lsp = dnode_get(node);
193 /*
194 * If this is a zero lsp, remove all the frags now
195 */
196 if (LSP_FRAGMENT(lsp->hdr.lsp_id) == 0) {
197 if (lsp->lspu.frags)
198 lsp_remove_frags(lsp->lspu.frags, lspdb);
199 } else {
200 /*
201 * else just remove this frag, from the zero lsps' frag
202 * list
203 */
204 if (lsp->lspu.zero_lsp
205 && lsp->lspu.zero_lsp->lspu.frags)
206 listnode_delete(lsp->lspu.zero_lsp->lspu.frags,
207 lsp);
208 }
209 lsp_destroy(lsp);
210 dnode_destroy(node);
211 }
212 }
213
214 /*
215 * Compares a LSP to given values
216 * Params are given in net order
217 */
218 int lsp_compare(char *areatag, struct isis_lsp *lsp, uint32_t seqno,
219 uint16_t checksum, uint16_t rem_lifetime)
220 {
221 if (lsp->hdr.seqno == seqno && lsp->hdr.checksum == checksum
222 && ((lsp->hdr.rem_lifetime == 0 && rem_lifetime == 0)
223 || (lsp->hdr.rem_lifetime != 0 && rem_lifetime != 0))) {
224 if (isis->debugs & DEBUG_SNP_PACKETS) {
225 zlog_debug(
226 "ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32
227 ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16
228 "s",
229 areatag, rawlspid_print(lsp->hdr.lsp_id),
230 lsp->hdr.seqno, lsp->hdr.checksum,
231 lsp->hdr.rem_lifetime);
232 zlog_debug(
233 "ISIS-Snp (%s): is equal to ours seq 0x%08" PRIx32
234 ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16
235 "s",
236 areatag, seqno, checksum, rem_lifetime);
237 }
238 return LSP_EQUAL;
239 }
240
241 /*
242 * LSPs with identical checksums should only be treated as newer if:
243 * a) The current LSP has a remaining lifetime != 0 and the other LSP
244 * has a
245 * remaining lifetime == 0. In this case, we should participate in
246 * the purge
247 * and should not treat the current LSP with remaining lifetime == 0
248 * as older.
249 * b) The LSP has an incorrect checksum. In this case, we need to react
250 * as given
251 * in 7.3.16.2.
252 */
253 if (seqno > lsp->hdr.seqno
254 || (seqno == lsp->hdr.seqno
255 && ((lsp->hdr.rem_lifetime != 0 && rem_lifetime == 0)
256 || lsp->hdr.checksum != checksum))) {
257 if (isis->debugs & DEBUG_SNP_PACKETS) {
258 zlog_debug(
259 "ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32
260 ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16
261 "s",
262 areatag, rawlspid_print(lsp->hdr.lsp_id), seqno,
263 checksum, rem_lifetime);
264 zlog_debug(
265 "ISIS-Snp (%s): is newer than ours seq 0x%08" PRIx32
266 ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16
267 "s",
268 areatag, lsp->hdr.seqno, lsp->hdr.checksum,
269 lsp->hdr.rem_lifetime);
270 }
271 return LSP_NEWER;
272 }
273 if (isis->debugs & DEBUG_SNP_PACKETS) {
274 zlog_debug("ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32
275 ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s",
276 areatag, rawlspid_print(lsp->hdr.lsp_id), seqno,
277 checksum, rem_lifetime);
278 zlog_debug(
279 "ISIS-Snp (%s): is older than ours seq 0x%08" PRIx32
280 ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s",
281 areatag, lsp->hdr.seqno, lsp->hdr.checksum,
282 lsp->hdr.rem_lifetime);
283 }
284
285 return LSP_OLDER;
286 }
287
288 static void put_lsp_hdr(struct isis_lsp *lsp, size_t *len_pointer, bool keep)
289 {
290 uint8_t pdu_type =
291 (lsp->level == IS_LEVEL_1) ? L1_LINK_STATE : L2_LINK_STATE;
292 struct isis_lsp_hdr *hdr = &lsp->hdr;
293 struct stream *stream = lsp->pdu;
294 size_t orig_getp = 0, orig_endp = 0;
295
296 if (keep) {
297 orig_getp = stream_get_getp(lsp->pdu);
298 orig_endp = stream_get_endp(lsp->pdu);
299 }
300
301 stream_set_getp(lsp->pdu, 0);
302 stream_set_endp(lsp->pdu, 0);
303
304 fill_fixed_hdr(pdu_type, stream);
305
306 if (len_pointer)
307 *len_pointer = stream_get_endp(stream);
308 stream_putw(stream, hdr->pdu_len);
309 stream_putw(stream, hdr->rem_lifetime);
310 stream_put(stream, hdr->lsp_id, sizeof(hdr->lsp_id));
311 stream_putl(stream, hdr->seqno);
312 stream_putw(stream, hdr->checksum);
313 stream_putc(stream, hdr->lsp_bits);
314
315 if (keep) {
316 stream_set_endp(lsp->pdu, orig_endp);
317 stream_set_getp(lsp->pdu, orig_getp);
318 }
319 }
320
321 static void lsp_add_auth(struct isis_lsp *lsp)
322 {
323 struct isis_passwd *passwd;
324 passwd = (lsp->level == IS_LEVEL_1) ? &lsp->area->area_passwd
325 : &lsp->area->domain_passwd;
326 isis_tlvs_add_auth(lsp->tlvs, passwd);
327 }
328
329 static void lsp_pack_pdu(struct isis_lsp *lsp)
330 {
331 if (!lsp->tlvs)
332 lsp->tlvs = isis_alloc_tlvs();
333
334 lsp_add_auth(lsp);
335
336 size_t len_pointer;
337 put_lsp_hdr(lsp, &len_pointer, false);
338 isis_pack_tlvs(lsp->tlvs, lsp->pdu, len_pointer, false, true);
339
340 lsp->hdr.pdu_len = stream_get_endp(lsp->pdu);
341 lsp->hdr.checksum =
342 ntohs(fletcher_checksum(STREAM_DATA(lsp->pdu) + 12,
343 stream_get_endp(lsp->pdu) - 12, 12));
344 }
345
346 void lsp_inc_seqno(struct isis_lsp *lsp, uint32_t seqno)
347 {
348 uint32_t newseq;
349
350 if (seqno == 0 || lsp->hdr.seqno > seqno)
351 newseq = lsp->hdr.seqno + 1;
352 else
353 newseq = seqno + 1;
354
355 lsp->hdr.seqno = newseq;
356
357 lsp_pack_pdu(lsp);
358 isis_spf_schedule(lsp->area, lsp->level);
359 }
360
361 static void lsp_purge_add_poi(struct isis_lsp *lsp,
362 const uint8_t *sender)
363 {
364 if (!lsp->area->purge_originator)
365 return;
366
367 /* add purge originator identification */
368 if (!lsp->tlvs)
369 lsp->tlvs = isis_alloc_tlvs();
370 isis_tlvs_set_purge_originator(lsp->tlvs, isis->sysid, sender);
371 isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get());
372 }
373
374 static void lsp_purge(struct isis_lsp *lsp, int level,
375 const uint8_t *sender)
376 {
377 /* reset stream */
378 lsp_clear_data(lsp);
379 stream_reset(lsp->pdu);
380
381 /* update header */
382 lsp->hdr.checksum = 0;
383 lsp->hdr.rem_lifetime = 0;
384 lsp->level = level;
385 lsp->age_out = lsp->area->max_lsp_lifetime[level - 1];
386
387 lsp_purge_add_poi(lsp, sender);
388
389 lsp_pack_pdu(lsp);
390 lsp_flood(lsp, NULL);
391 }
392
393 /*
394 * Generates checksum for LSP and its frags
395 */
396 static void lsp_seqno_update(struct isis_lsp *lsp0)
397 {
398 struct isis_lsp *lsp;
399 struct listnode *node;
400
401 lsp_inc_seqno(lsp0, 0);
402
403 if (!lsp0->lspu.frags)
404 return;
405
406 for (ALL_LIST_ELEMENTS_RO(lsp0->lspu.frags, node, lsp)) {
407 if (lsp->tlvs)
408 lsp_inc_seqno(lsp, 0);
409 else
410 lsp_purge(lsp, lsp0->level, NULL);
411 }
412
413 return;
414 }
415
416 static uint8_t lsp_bits_generate(int level, int overload_bit, int attached_bit)
417 {
418 uint8_t lsp_bits = 0;
419 if (level == IS_LEVEL_1)
420 lsp_bits = IS_LEVEL_1;
421 else
422 lsp_bits = IS_LEVEL_1_AND_2;
423 if (overload_bit)
424 lsp_bits |= overload_bit;
425 if (attached_bit)
426 lsp_bits |= attached_bit;
427 return lsp_bits;
428 }
429
430 static void lsp_update_data(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr,
431 struct isis_tlvs *tlvs, struct stream *stream,
432 struct isis_area *area, int level)
433 {
434 /* free the old lsp data */
435 lsp_clear_data(lsp);
436
437 /* copying only the relevant part of our stream */
438 if (lsp->pdu != NULL)
439 stream_free(lsp->pdu);
440 lsp->pdu = stream_dup(stream);
441
442 memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr));
443 lsp->area = area;
444 lsp->level = level;
445 lsp->age_out = ZERO_AGE_LIFETIME;
446 lsp->installed = time(NULL);
447
448 lsp->tlvs = tlvs;
449
450 if (area->dynhostname && lsp->tlvs->hostname
451 && lsp->hdr.rem_lifetime) {
452 isis_dynhn_insert(lsp->hdr.lsp_id, lsp->tlvs->hostname,
453 (lsp->hdr.lsp_bits & LSPBIT_IST)
454 == IS_LEVEL_1_AND_2
455 ? IS_LEVEL_2
456 : IS_LEVEL_1);
457 }
458
459 return;
460 }
461
462 static void lsp_link_fragment(struct isis_lsp *lsp, struct isis_lsp *lsp0)
463 {
464 if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) {
465 /* zero lsp -> create list to store fragments */
466 lsp->lspu.frags = list_new();
467 } else {
468 /* fragment -> set backpointer and add to zero lsps list */
469 assert(lsp0);
470 lsp->lspu.zero_lsp = lsp0;
471 listnode_add(lsp0->lspu.frags, lsp);
472 }
473 }
474
475 void lsp_update(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr,
476 struct isis_tlvs *tlvs, struct stream *stream,
477 struct isis_area *area, int level, bool confusion)
478 {
479 if (lsp->own_lsp) {
480 flog_err(
481 EC_LIB_DEVELOPMENT,
482 "ISIS-Upd (%s): BUG updating LSP %s still marked as own LSP",
483 area->area_tag, rawlspid_print(lsp->hdr.lsp_id));
484 lsp_clear_data(lsp);
485 lsp->own_lsp = 0;
486 }
487
488 if (confusion) {
489 lsp_purge(lsp, level, NULL);
490 } else {
491 lsp_update_data(lsp, hdr, tlvs, stream, area, level);
492 }
493
494 if (LSP_FRAGMENT(lsp->hdr.lsp_id) && !lsp->lspu.zero_lsp) {
495 uint8_t lspid[ISIS_SYS_ID_LEN + 2];
496 struct isis_lsp *lsp0;
497
498 memcpy(lspid, lsp->hdr.lsp_id, ISIS_SYS_ID_LEN + 1);
499 LSP_FRAGMENT(lspid) = 0;
500 lsp0 = lsp_search(lspid, area->lspdb[level - 1]);
501 if (lsp0)
502 lsp_link_fragment(lsp, lsp0);
503 }
504
505 if (lsp->hdr.seqno)
506 isis_spf_schedule(lsp->area, lsp->level);
507 }
508
509 /* creation of LSP directly from what we received */
510 struct isis_lsp *lsp_new_from_recv(struct isis_lsp_hdr *hdr,
511 struct isis_tlvs *tlvs,
512 struct stream *stream, struct isis_lsp *lsp0,
513 struct isis_area *area, int level)
514 {
515 struct isis_lsp *lsp;
516
517 lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp));
518 lsp_update_data(lsp, hdr, tlvs, stream, area, level);
519 lsp_link_fragment(lsp, lsp0);
520
521 return lsp;
522 }
523
524 static void lsp_adjust_stream(struct isis_lsp *lsp)
525 {
526 if (lsp->pdu) {
527 if (STREAM_SIZE(lsp->pdu) == LLC_LEN + lsp->area->lsp_mtu)
528 return;
529 stream_free(lsp->pdu);
530 }
531
532 lsp->pdu = stream_new(LLC_LEN + lsp->area->lsp_mtu);
533 }
534
535 struct isis_lsp *lsp_new(struct isis_area *area, uint8_t *lsp_id,
536 uint16_t rem_lifetime, uint32_t seqno,
537 uint8_t lsp_bits, uint16_t checksum,
538 struct isis_lsp *lsp0, int level)
539 {
540 struct isis_lsp *lsp;
541
542 lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp));
543 lsp->area = area;
544
545 lsp_adjust_stream(lsp);
546
547 /* Minimal LSP PDU size */
548 lsp->hdr.pdu_len = ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN;
549 memcpy(lsp->hdr.lsp_id, lsp_id, sizeof(lsp->hdr.lsp_id));
550 lsp->hdr.checksum = checksum;
551 lsp->hdr.seqno = seqno;
552 lsp->hdr.rem_lifetime = rem_lifetime;
553 lsp->hdr.lsp_bits = lsp_bits;
554 lsp->level = level;
555 lsp->age_out = ZERO_AGE_LIFETIME;
556 lsp_link_fragment(lsp, lsp0);
557 put_lsp_hdr(lsp, NULL, false);
558
559 if (isis->debugs & DEBUG_EVENTS)
560 zlog_debug("New LSP with ID %s-%02x-%02x len %d seqnum %08x",
561 sysid_print(lsp_id), LSP_PSEUDO_ID(lsp->hdr.lsp_id),
562 LSP_FRAGMENT(lsp->hdr.lsp_id), lsp->hdr.pdu_len,
563 lsp->hdr.seqno);
564
565 return lsp;
566 }
567
568 void lsp_insert(struct isis_lsp *lsp, dict_t *lspdb)
569 {
570 dict_alloc_insert(lspdb, lsp->hdr.lsp_id, lsp);
571 if (lsp->hdr.seqno)
572 isis_spf_schedule(lsp->area, lsp->level);
573 }
574
575 /*
576 * Build a list of LSPs with non-zero ht bounded by start and stop ids
577 */
578 void lsp_build_list_nonzero_ht(uint8_t *start_id, uint8_t *stop_id,
579 struct list *list, dict_t *lspdb)
580 {
581 dnode_t *first, *last, *curr;
582
583 first = dict_lower_bound(lspdb, start_id);
584 if (!first)
585 return;
586
587 last = dict_upper_bound(lspdb, stop_id);
588
589 curr = first;
590
591 if (((struct isis_lsp *)(curr->dict_data))->hdr.rem_lifetime)
592 listnode_add(list, first->dict_data);
593
594 while (curr) {
595 curr = dict_next(lspdb, curr);
596 if (curr
597 && ((struct isis_lsp *)(curr->dict_data))->hdr.rem_lifetime)
598 listnode_add(list, curr->dict_data);
599 if (curr == last)
600 break;
601 }
602
603 return;
604 }
605
606 static void lsp_set_time(struct isis_lsp *lsp)
607 {
608 assert(lsp);
609
610 if (lsp->hdr.rem_lifetime == 0) {
611 if (lsp->age_out > 0)
612 lsp->age_out--;
613 return;
614 }
615
616 lsp->hdr.rem_lifetime--;
617 if (lsp->pdu && stream_get_endp(lsp->pdu) >= 12)
618 stream_putw_at(lsp->pdu, 10, lsp->hdr.rem_lifetime);
619 }
620
621 static void lspid_print(uint8_t *lsp_id, uint8_t *trg, char dynhost, char frag)
622 {
623 struct isis_dynhn *dyn = NULL;
624 uint8_t id[SYSID_STRLEN];
625
626 if (dynhost)
627 dyn = dynhn_find_by_id(lsp_id);
628 else
629 dyn = NULL;
630
631 if (dyn)
632 sprintf((char *)id, "%.14s", dyn->hostname);
633 else if (!memcmp(isis->sysid, lsp_id, ISIS_SYS_ID_LEN) && dynhost)
634 sprintf((char *)id, "%.14s", cmd_hostname_get());
635 else
636 memcpy(id, sysid_print(lsp_id), 15);
637 if (frag)
638 sprintf((char *)trg, "%s.%02x-%02x", id, LSP_PSEUDO_ID(lsp_id),
639 LSP_FRAGMENT(lsp_id));
640 else
641 sprintf((char *)trg, "%s.%02x", id, LSP_PSEUDO_ID(lsp_id));
642 }
643
644 /* Convert the lsp attribute bits to attribute string */
645 static const char *lsp_bits2string(uint8_t lsp_bits, char *buf, size_t buf_size)
646 {
647 char *pos = buf;
648
649 if (!lsp_bits)
650 return " none";
651
652 if (buf_size < 2 * 3)
653 return " error";
654
655 /* we only focus on the default metric */
656 pos += sprintf(pos, "%d/",
657 ISIS_MASK_LSP_ATT_DEFAULT_BIT(lsp_bits) ? 1 : 0);
658
659 pos += sprintf(pos, "%d/",
660 ISIS_MASK_LSP_PARTITION_BIT(lsp_bits) ? 1 : 0);
661
662 sprintf(pos, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits) ? 1 : 0);
663
664 return buf;
665 }
666
667 /* this function prints the lsp on show isis database */
668 void lsp_print(struct isis_lsp *lsp, struct vty *vty, char dynhost)
669 {
670 uint8_t LSPid[255];
671 char age_out[8];
672 char b[200];
673
674 lspid_print(lsp->hdr.lsp_id, LSPid, dynhost, 1);
675 vty_out(vty, "%-21s%c ", LSPid, lsp->own_lsp ? '*' : ' ');
676 vty_out(vty, "%5" PRIu16 " ", lsp->hdr.pdu_len);
677 vty_out(vty, "0x%08" PRIx32 " ", lsp->hdr.seqno);
678 vty_out(vty, "0x%04" PRIx16 " ", lsp->hdr.checksum);
679 if (lsp->hdr.rem_lifetime == 0) {
680 snprintf(age_out, 8, "(%d)", lsp->age_out);
681 age_out[7] = '\0';
682 vty_out(vty, "%7s ", age_out);
683 } else
684 vty_out(vty, " %5" PRIu16 " ", lsp->hdr.rem_lifetime);
685 vty_out(vty, "%s\n", lsp_bits2string(lsp->hdr.lsp_bits, b, sizeof(b)));
686 }
687
688 void lsp_print_detail(struct isis_lsp *lsp, struct vty *vty, char dynhost)
689 {
690 lsp_print(lsp, vty, dynhost);
691 if (lsp->tlvs)
692 vty_multiline(vty, " ", "%s", isis_format_tlvs(lsp->tlvs));
693 vty_out(vty, "\n");
694 }
695
696 /* print all the lsps info in the local lspdb */
697 int lsp_print_all(struct vty *vty, dict_t *lspdb, char detail, char dynhost)
698 {
699
700 dnode_t *node = dict_first(lspdb), *next;
701 int lsp_count = 0;
702
703 if (detail == ISIS_UI_LEVEL_BRIEF) {
704 while (node != NULL) {
705 /* I think it is unnecessary, so I comment it out */
706 /* dict_contains (lspdb, node); */
707 next = dict_next(lspdb, node);
708 lsp_print(dnode_get(node), vty, dynhost);
709 node = next;
710 lsp_count++;
711 }
712 } else if (detail == ISIS_UI_LEVEL_DETAIL) {
713 while (node != NULL) {
714 next = dict_next(lspdb, node);
715 lsp_print_detail(dnode_get(node), vty, dynhost);
716 node = next;
717 lsp_count++;
718 }
719 }
720
721 return lsp_count;
722 }
723
724 static uint16_t lsp_rem_lifetime(struct isis_area *area, int level)
725 {
726 uint16_t rem_lifetime;
727
728 /* Add jitter to configured LSP lifetime */
729 rem_lifetime =
730 isis_jitter(area->max_lsp_lifetime[level - 1], MAX_AGE_JITTER);
731
732 /* No jitter if the max refresh will be less than configure gen interval
733 */
734 /* N.B. this calucation is acceptable since rem_lifetime is in
735 * [332,65535] at
736 * this point */
737 if (area->lsp_gen_interval[level - 1] > (rem_lifetime - 300))
738 rem_lifetime = area->max_lsp_lifetime[level - 1];
739
740 return rem_lifetime;
741 }
742
743 static uint16_t lsp_refresh_time(struct isis_lsp *lsp, uint16_t rem_lifetime)
744 {
745 struct isis_area *area = lsp->area;
746 int level = lsp->level;
747 uint16_t refresh_time;
748
749 /* Add jitter to LSP refresh time */
750 refresh_time =
751 isis_jitter(area->lsp_refresh[level - 1], MAX_LSP_GEN_JITTER);
752
753 /* RFC 4444 : make sure the refresh time is at least less than 300
754 * of the remaining lifetime and more than gen interval */
755 if (refresh_time <= area->lsp_gen_interval[level - 1]
756 || refresh_time > (rem_lifetime - 300))
757 refresh_time = rem_lifetime - 300;
758
759 /* In cornercases, refresh_time might be <= lsp_gen_interval, however
760 * we accept this violation to satisfy refresh_time <= rem_lifetime -
761 * 300 */
762
763 return refresh_time;
764 }
765
766 static void lsp_build_ext_reach_ipv4(struct isis_lsp *lsp,
767 struct isis_area *area)
768 {
769 struct route_table *er_table = get_ext_reach(area, AF_INET, lsp->level);
770 if (!er_table)
771 return;
772
773 for (struct route_node *rn = route_top(er_table); rn;
774 rn = route_next(rn)) {
775 if (!rn->info)
776 continue;
777
778 struct prefix_ipv4 *ipv4 = (struct prefix_ipv4 *)&rn->p;
779 struct isis_ext_info *info = rn->info;
780
781 uint32_t metric = info->metric;
782 if (metric > MAX_WIDE_PATH_METRIC)
783 metric = MAX_WIDE_PATH_METRIC;
784 if (area->oldmetric && metric > 0x3f)
785 metric = 0x3f;
786
787 if (area->oldmetric)
788 isis_tlvs_add_oldstyle_ip_reach(lsp->tlvs, ipv4,
789 metric);
790 if (area->newmetric)
791 isis_tlvs_add_extended_ip_reach(lsp->tlvs, ipv4,
792 metric);
793 }
794 }
795
796 static void lsp_build_ext_reach_ipv6(struct isis_lsp *lsp,
797 struct isis_area *area)
798 {
799 struct route_table *er_table =
800 get_ext_reach(area, AF_INET6, lsp->level);
801 if (!er_table)
802 return;
803
804 for (struct route_node *rn = route_top(er_table); rn;
805 rn = srcdest_route_next(rn)) {
806 if (!rn->info)
807 continue;
808 struct isis_ext_info *info = rn->info;
809
810 struct prefix_ipv6 *p, *src_p;
811 srcdest_rnode_prefixes(rn, (const struct prefix **)&p,
812 (const struct prefix **)&src_p);
813
814 uint32_t metric = info->metric;
815 if (info->metric > MAX_WIDE_PATH_METRIC)
816 metric = MAX_WIDE_PATH_METRIC;
817
818 if (!src_p || !src_p->prefixlen) {
819 isis_tlvs_add_ipv6_reach(lsp->tlvs,
820 isis_area_ipv6_topology(area),
821 p, metric);
822 } else if (isis_area_ipv6_dstsrc_enabled(area)) {
823 isis_tlvs_add_ipv6_dstsrc_reach(lsp->tlvs,
824 ISIS_MT_IPV6_DSTSRC,
825 p, src_p, metric);
826 }
827 }
828 }
829
830 static void lsp_build_ext_reach(struct isis_lsp *lsp, struct isis_area *area)
831 {
832 lsp_build_ext_reach_ipv4(lsp, area);
833 lsp_build_ext_reach_ipv6(lsp, area);
834 }
835
836 static struct isis_lsp *lsp_next_frag(uint8_t frag_num, struct isis_lsp *lsp0,
837 struct isis_area *area, int level)
838 {
839 struct isis_lsp *lsp;
840 uint8_t frag_id[ISIS_SYS_ID_LEN + 2];
841
842 memcpy(frag_id, lsp0->hdr.lsp_id, ISIS_SYS_ID_LEN + 1);
843 LSP_FRAGMENT(frag_id) = frag_num;
844
845 lsp = lsp_search(frag_id, area->lspdb[level - 1]);
846 if (lsp) {
847 lsp_clear_data(lsp);
848 if (!lsp->lspu.zero_lsp)
849 lsp_link_fragment(lsp, lsp0);
850 return lsp;
851 }
852
853 lsp = lsp_new(area, frag_id, lsp0->hdr.rem_lifetime, 0,
854 lsp_bits_generate(level, area->overload_bit,
855 area->attached_bit),
856 0, lsp0, level);
857 lsp->own_lsp = 1;
858 lsp_insert(lsp, area->lspdb[level - 1]);
859 return lsp;
860 }
861
862 /*
863 * Builds the LSP data part. This func creates a new frag whenever
864 * area->lsp_frag_threshold is exceeded.
865 */
866 static void lsp_build(struct isis_lsp *lsp, struct isis_area *area)
867 {
868 int level = lsp->level;
869 char buf[PREFIX2STR_BUFFER];
870 struct listnode *node;
871 struct isis_lsp *frag;
872
873 lsp_clear_data(lsp);
874 for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag))
875 lsp_clear_data(frag);
876
877 lsp->tlvs = isis_alloc_tlvs();
878 lsp_debug("ISIS (%s): Constructing local system LSP for level %d",
879 area->area_tag, level);
880
881 lsp->hdr.lsp_bits = lsp_bits_generate(level, area->overload_bit,
882 area->attached_bit);
883
884 lsp_add_auth(lsp);
885
886 isis_tlvs_add_area_addresses(lsp->tlvs, area->area_addrs);
887
888 /* Protocols Supported */
889 if (area->ip_circuits > 0 || area->ipv6_circuits > 0) {
890 struct nlpids nlpids = {.count = 0};
891 if (area->ip_circuits > 0) {
892 lsp_debug(
893 "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs",
894 area->area_tag);
895 nlpids.nlpids[nlpids.count] = NLPID_IP;
896 nlpids.count++;
897 }
898 if (area->ipv6_circuits > 0) {
899 lsp_debug(
900 "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs",
901 area->area_tag);
902 nlpids.nlpids[nlpids.count] = NLPID_IPV6;
903 nlpids.count++;
904 }
905 isis_tlvs_set_protocols_supported(lsp->tlvs, &nlpids);
906 }
907
908 if (area_is_mt(area)) {
909 lsp_debug("ISIS (%s): Adding MT router tlv...", area->area_tag);
910
911 struct isis_area_mt_setting **mt_settings;
912 unsigned int mt_count;
913
914 mt_settings = area_mt_settings(area, &mt_count);
915 for (unsigned int i = 0; i < mt_count; i++) {
916 isis_tlvs_add_mt_router_info(
917 lsp->tlvs, mt_settings[i]->mtid,
918 mt_settings[i]->overload, false);
919 lsp_debug("ISIS (%s): MT %s", area->area_tag,
920 isis_mtid2str(mt_settings[i]->mtid));
921 }
922 } else {
923 lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)",
924 area->area_tag);
925 }
926 /* Dynamic Hostname */
927 if (area->dynhostname) {
928 isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get());
929 lsp_debug("ISIS (%s): Adding dynamic hostname '%s'",
930 area->area_tag, cmd_hostname_get());
931 } else {
932 lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)",
933 area->area_tag);
934 }
935
936 /* IPv4 address and TE router ID TLVs. In case of the first one we don't
937 * follow "C" vendor, but "J" vendor behavior - one IPv4 address is put
938 * into
939 * LSP and this address is same as router id. */
940 if (isis->router_id != 0) {
941 struct in_addr id = {.s_addr = isis->router_id};
942 inet_ntop(AF_INET, &id, buf, sizeof(buf));
943 lsp_debug("ISIS (%s): Adding router ID %s as IPv4 tlv.",
944 area->area_tag, buf);
945 isis_tlvs_add_ipv4_address(lsp->tlvs, &id);
946
947 /* Exactly same data is put into TE router ID TLV, but only if
948 * new style
949 * TLV's are in use. */
950 if (area->newmetric) {
951
952 lsp_debug(
953 "ISIS (%s): Adding router ID also as TE router ID tlv.",
954 area->area_tag);
955 isis_tlvs_set_te_router_id(lsp->tlvs, &id);
956 }
957 } else {
958 lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.",
959 area->area_tag);
960 }
961
962 lsp_debug("ISIS (%s): Adding circuit specific information.",
963 area->area_tag);
964
965 if (fabricd) {
966 lsp_debug(
967 "ISIS (%s): Adding tier %" PRIu8 " spine-leaf-extension tlv.",
968 area->area_tag, fabricd_tier(area));
969 isis_tlvs_add_spine_leaf(lsp->tlvs, fabricd_tier(area), true,
970 false, false, false);
971 }
972
973 struct isis_circuit *circuit;
974 for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit)) {
975 if (!circuit->interface)
976 lsp_debug(
977 "ISIS (%s): Processing %s circuit %p with unknown interface",
978 area->area_tag,
979 circuit_type2string(circuit->circ_type),
980 circuit);
981 else
982 lsp_debug("ISIS (%s): Processing %s circuit %s",
983 area->area_tag,
984 circuit_type2string(circuit->circ_type),
985 circuit->interface->name);
986
987 if (circuit->state != C_STATE_UP) {
988 lsp_debug("ISIS (%s): Circuit is not up, ignoring.",
989 area->area_tag);
990 continue;
991 }
992
993 uint32_t metric = area->oldmetric
994 ? circuit->metric[level - 1]
995 : circuit->te_metric[level - 1];
996
997 if (circuit->ip_router && circuit->ip_addrs
998 && circuit->ip_addrs->count > 0) {
999 lsp_debug(
1000 "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.",
1001 area->area_tag);
1002 struct listnode *ipnode;
1003 struct prefix_ipv4 *ipv4;
1004 for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, ipnode,
1005 ipv4)) {
1006 if (area->oldmetric) {
1007 lsp_debug(
1008 "ISIS (%s): Adding old-style IP reachability for %s",
1009 area->area_tag,
1010 prefix2str(ipv4, buf,
1011 sizeof(buf)));
1012 isis_tlvs_add_oldstyle_ip_reach(
1013 lsp->tlvs, ipv4, metric);
1014 }
1015
1016 if (area->newmetric) {
1017 lsp_debug(
1018 "ISIS (%s): Adding te-style IP reachability for %s",
1019 area->area_tag,
1020 prefix2str(ipv4, buf,
1021 sizeof(buf)));
1022 isis_tlvs_add_extended_ip_reach(
1023 lsp->tlvs, ipv4, metric);
1024 }
1025 }
1026 }
1027
1028 if (circuit->ipv6_router && circuit->ipv6_non_link
1029 && circuit->ipv6_non_link->count > 0) {
1030 struct listnode *ipnode;
1031 struct prefix_ipv6 *ipv6;
1032 for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link,
1033 ipnode, ipv6)) {
1034 lsp_debug(
1035 "ISIS (%s): Adding IPv6 reachability for %s",
1036 area->area_tag,
1037 prefix2str(ipv6, buf, sizeof(buf)));
1038 isis_tlvs_add_ipv6_reach(
1039 lsp->tlvs,
1040 isis_area_ipv6_topology(area), ipv6,
1041 metric);
1042 }
1043 }
1044
1045 switch (circuit->circ_type) {
1046 case CIRCUIT_T_BROADCAST:
1047 if (level & circuit->is_type) {
1048 uint8_t *ne_id =
1049 (level == IS_LEVEL_1)
1050 ? circuit->u.bc.l1_desig_is
1051 : circuit->u.bc.l2_desig_is;
1052
1053 if (LSP_PSEUDO_ID(ne_id)) {
1054 if (area->oldmetric) {
1055 lsp_debug(
1056 "ISIS (%s): Adding DIS %s.%02x as old-style neighbor",
1057 area->area_tag,
1058 sysid_print(ne_id),
1059 LSP_PSEUDO_ID(ne_id));
1060 isis_tlvs_add_oldstyle_reach(
1061 lsp->tlvs, ne_id,
1062 metric);
1063 }
1064 if (area->newmetric) {
1065 uint8_t subtlvs[256];
1066 uint8_t subtlv_len;
1067
1068 if (IS_MPLS_TE(isisMplsTE)
1069 && circuit->interface
1070 && HAS_LINK_PARAMS(
1071 circuit->interface))
1072 subtlv_len = add_te_subtlvs(
1073 subtlvs,
1074 circuit->mtc);
1075 else
1076 subtlv_len = 0;
1077
1078 tlvs_add_mt_bcast(
1079 lsp->tlvs, circuit,
1080 level, ne_id, metric,
1081 subtlvs, subtlv_len);
1082 }
1083 }
1084 } else {
1085 lsp_debug(
1086 "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors",
1087 area->area_tag);
1088 }
1089 break;
1090 case CIRCUIT_T_P2P: {
1091 struct isis_adjacency *nei = circuit->u.p2p.neighbor;
1092 if (nei && nei->adj_state == ISIS_ADJ_UP
1093 && (level & nei->circuit_t)) {
1094 uint8_t ne_id[7];
1095 memcpy(ne_id, nei->sysid, ISIS_SYS_ID_LEN);
1096 LSP_PSEUDO_ID(ne_id) = 0;
1097
1098 if (area->oldmetric) {
1099 lsp_debug(
1100 "ISIS (%s): Adding old-style is reach for %s",
1101 area->area_tag,
1102 sysid_print(ne_id));
1103 isis_tlvs_add_oldstyle_reach(
1104 lsp->tlvs, ne_id, metric);
1105 }
1106 if (area->newmetric) {
1107 uint8_t subtlvs[256];
1108 uint8_t subtlv_len;
1109
1110 if (IS_MPLS_TE(isisMplsTE)
1111 && circuit->interface != NULL
1112 && HAS_LINK_PARAMS(
1113 circuit->interface))
1114 /* Update Local and Remote IP
1115 * address for MPLS TE circuit
1116 * parameters */
1117 /* NOTE sure that it is the
1118 * pertinent place for that
1119 * updates */
1120 /* Local IP address could be
1121 * updated in isis_circuit.c -
1122 * isis_circuit_add_addr() */
1123 /* But, where update remote IP
1124 * address ? in isis_pdu.c -
1125 * process_p2p_hello() ? */
1126
1127 /* Add SubTLVs & Adjust real
1128 * size of SubTLVs */
1129 subtlv_len = add_te_subtlvs(
1130 subtlvs, circuit->mtc);
1131 else
1132 /* Or keep only TE metric with
1133 * no SubTLVs if MPLS_TE is off
1134 */
1135 subtlv_len = 0;
1136
1137 uint32_t neighbor_metric;
1138 if (fabricd_tier(area) == 0) {
1139 neighbor_metric = 0xffe;
1140 } else {
1141 neighbor_metric = metric;
1142 }
1143
1144 tlvs_add_mt_p2p(lsp->tlvs, circuit,
1145 ne_id, neighbor_metric,
1146 subtlvs, subtlv_len);
1147 }
1148 } else {
1149 lsp_debug(
1150 "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors",
1151 area->area_tag);
1152 }
1153 } break;
1154 case CIRCUIT_T_LOOPBACK:
1155 break;
1156 default:
1157 zlog_warn("lsp_area_create: unknown circuit type");
1158 }
1159 }
1160
1161 lsp_build_ext_reach(lsp, area);
1162
1163 struct isis_tlvs *tlvs = lsp->tlvs;
1164 lsp->tlvs = NULL;
1165
1166 lsp_adjust_stream(lsp);
1167 lsp_pack_pdu(lsp);
1168 size_t tlv_space = STREAM_WRITEABLE(lsp->pdu) - LLC_LEN;
1169 lsp_clear_data(lsp);
1170
1171 struct list *fragments = isis_fragment_tlvs(tlvs, tlv_space);
1172 if (!fragments) {
1173 zlog_warn("BUG: could not fragment own LSP:");
1174 log_multiline(LOG_WARNING, " ", "%s",
1175 isis_format_tlvs(tlvs));
1176 isis_free_tlvs(tlvs);
1177 return;
1178 }
1179 isis_free_tlvs(tlvs);
1180
1181 bool fragment_overflow = false;
1182 frag = lsp;
1183 for (ALL_LIST_ELEMENTS_RO(fragments, node, tlvs)) {
1184 if (node != listhead(fragments)) {
1185 if (LSP_FRAGMENT(frag->hdr.lsp_id) == 255) {
1186 if (!fragment_overflow) {
1187 fragment_overflow = true;
1188 zlog_warn(
1189 "ISIS (%s): Too much information for 256 fragments",
1190 area->area_tag);
1191 }
1192 isis_free_tlvs(tlvs);
1193 continue;
1194 }
1195
1196 frag = lsp_next_frag(LSP_FRAGMENT(frag->hdr.lsp_id) + 1,
1197 lsp, area, level);
1198 lsp_adjust_stream(frag);
1199 }
1200 frag->tlvs = tlvs;
1201 }
1202
1203 list_delete(&fragments);
1204 lsp_debug("ISIS (%s): LSP construction is complete. Serializing...",
1205 area->area_tag);
1206 return;
1207 }
1208
1209 /*
1210 * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs
1211 */
1212 int lsp_generate(struct isis_area *area, int level)
1213 {
1214 struct isis_lsp *oldlsp, *newlsp;
1215 uint32_t seq_num = 0;
1216 uint8_t lspid[ISIS_SYS_ID_LEN + 2];
1217 uint16_t rem_lifetime, refresh_time;
1218
1219 if ((area == NULL) || (area->is_type & level) != level)
1220 return ISIS_ERROR;
1221
1222 memset(&lspid, 0, ISIS_SYS_ID_LEN + 2);
1223 memcpy(&lspid, isis->sysid, ISIS_SYS_ID_LEN);
1224
1225 /* only builds the lsp if the area shares the level */
1226 oldlsp = lsp_search(lspid, area->lspdb[level - 1]);
1227 if (oldlsp) {
1228 /* FIXME: we should actually initiate a purge */
1229 seq_num = oldlsp->hdr.seqno;
1230 lsp_search_and_destroy(oldlsp->hdr.lsp_id,
1231 area->lspdb[level - 1]);
1232 }
1233 rem_lifetime = lsp_rem_lifetime(area, level);
1234 newlsp =
1235 lsp_new(area, lspid, rem_lifetime, seq_num,
1236 area->is_type | area->overload_bit | area->attached_bit,
1237 0, NULL, level);
1238 newlsp->area = area;
1239 newlsp->own_lsp = 1;
1240
1241 lsp_insert(newlsp, area->lspdb[level - 1]);
1242 /* build_lsp_data (newlsp, area); */
1243 lsp_build(newlsp, area);
1244 /* time to calculate our checksum */
1245 lsp_seqno_update(newlsp);
1246 newlsp->last_generated = time(NULL);
1247 lsp_flood(newlsp, NULL);
1248
1249 refresh_time = lsp_refresh_time(newlsp, rem_lifetime);
1250
1251 THREAD_TIMER_OFF(area->t_lsp_refresh[level - 1]);
1252 area->lsp_regenerate_pending[level - 1] = 0;
1253 thread_add_timer(master, lsp_refresh,
1254 &area->lsp_refresh_arg[level - 1], refresh_time,
1255 &area->t_lsp_refresh[level - 1]);
1256
1257 if (isis->debugs & DEBUG_UPDATE_PACKETS) {
1258 zlog_debug("ISIS-Upd (%s): Building L%d LSP %s, len %" PRIu16
1259 ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16
1260 ", lifetime %" PRIu16 "s refresh %" PRIu16 "s",
1261 area->area_tag, level,
1262 rawlspid_print(newlsp->hdr.lsp_id),
1263 newlsp->hdr.pdu_len, newlsp->hdr.seqno,
1264 newlsp->hdr.checksum, newlsp->hdr.rem_lifetime,
1265 refresh_time);
1266 }
1267 sched_debug(
1268 "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.",
1269 area->area_tag, level);
1270
1271 return ISIS_OK;
1272 }
1273
1274 /*
1275 * Search own LSPs, update holding time and flood
1276 */
1277 static int lsp_regenerate(struct isis_area *area, int level)
1278 {
1279 dict_t *lspdb;
1280 struct isis_lsp *lsp, *frag;
1281 struct listnode *node;
1282 uint8_t lspid[ISIS_SYS_ID_LEN + 2];
1283 uint16_t rem_lifetime, refresh_time;
1284
1285 if ((area == NULL) || (area->is_type & level) != level)
1286 return ISIS_ERROR;
1287
1288 lspdb = area->lspdb[level - 1];
1289
1290 memset(lspid, 0, ISIS_SYS_ID_LEN + 2);
1291 memcpy(lspid, isis->sysid, ISIS_SYS_ID_LEN);
1292
1293 lsp = lsp_search(lspid, lspdb);
1294
1295 if (!lsp) {
1296 flog_err(EC_LIB_DEVELOPMENT,
1297 "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!",
1298 area->area_tag, level);
1299 return ISIS_ERROR;
1300 }
1301
1302 lsp_clear_data(lsp);
1303 lsp_build(lsp, area);
1304 rem_lifetime = lsp_rem_lifetime(area, level);
1305 lsp->hdr.rem_lifetime = rem_lifetime;
1306 lsp->last_generated = time(NULL);
1307 lsp_flood(lsp, NULL);
1308 for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) {
1309 frag->hdr.lsp_bits = lsp_bits_generate(
1310 level, area->overload_bit, area->attached_bit);
1311 /* Set the lifetime values of all the fragments to the same
1312 * value,
1313 * so that no fragment expires before the lsp is refreshed.
1314 */
1315 frag->hdr.rem_lifetime = rem_lifetime;
1316 frag->age_out = ZERO_AGE_LIFETIME;
1317 lsp_flood(frag, NULL);
1318 }
1319 lsp_seqno_update(lsp);
1320
1321 refresh_time = lsp_refresh_time(lsp, rem_lifetime);
1322 thread_add_timer(master, lsp_refresh,
1323 &area->lsp_refresh_arg[level - 1], refresh_time,
1324 &area->t_lsp_refresh[level - 1]);
1325 area->lsp_regenerate_pending[level - 1] = 0;
1326
1327 if (isis->debugs & DEBUG_UPDATE_PACKETS) {
1328 zlog_debug(
1329 "ISIS-Upd (%s): Refreshed our L%d LSP %s, len %" PRIu16
1330 ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16
1331 ", lifetime %" PRIu16 "s refresh %" PRIu16 "s",
1332 area->area_tag, level, rawlspid_print(lsp->hdr.lsp_id),
1333 lsp->hdr.pdu_len, lsp->hdr.seqno, lsp->hdr.checksum,
1334 lsp->hdr.rem_lifetime, refresh_time);
1335 }
1336 sched_debug(
1337 "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.",
1338 area->area_tag, level);
1339
1340 return ISIS_OK;
1341 }
1342
1343 /*
1344 * Something has changed or periodic refresh -> regenerate LSP
1345 */
1346 static int lsp_refresh(struct thread *thread)
1347 {
1348 struct lsp_refresh_arg *arg = THREAD_ARG(thread);
1349
1350 assert(arg);
1351
1352 struct isis_area *area = arg->area;
1353
1354 assert(area);
1355
1356 int level = arg->level;
1357
1358 area->t_lsp_refresh[level - 1] = NULL;
1359 area->lsp_regenerate_pending[level - 1] = 0;
1360
1361 if ((area->is_type & level) == 0)
1362 return ISIS_ERROR;
1363
1364 if (monotime_since(&area->last_lsp_refresh_event[level - 1], NULL) < 50000L) {
1365 sched_debug("ISIS (%s): Still unstable, postpone LSP L%d refresh",
1366 area->area_tag, level);
1367 _lsp_regenerate_schedule(area, level, 0, false,
1368 __func__, __FILE__, __LINE__);
1369 return 0;
1370 }
1371
1372 sched_debug(
1373 "ISIS (%s): LSP L%d refresh timer expired. Refreshing LSP...",
1374 area->area_tag, level);
1375 return lsp_regenerate(area, level);
1376 }
1377
1378 int _lsp_regenerate_schedule(struct isis_area *area, int level,
1379 int all_pseudo, bool postpone,
1380 const char *func, const char *file,
1381 int line)
1382 {
1383 struct isis_lsp *lsp;
1384 uint8_t id[ISIS_SYS_ID_LEN + 2];
1385 time_t now, diff;
1386 long timeout;
1387 struct listnode *cnode;
1388 struct isis_circuit *circuit;
1389 int lvl;
1390
1391 if (area == NULL)
1392 return ISIS_ERROR;
1393
1394 sched_debug(
1395 "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs"
1396 " Caller: %s %s:%d",
1397 area->area_tag, circuit_t2string(level),
1398 all_pseudo ? "" : "not ",
1399 func, file, line);
1400
1401 memcpy(id, isis->sysid, ISIS_SYS_ID_LEN);
1402 LSP_PSEUDO_ID(id) = LSP_FRAGMENT(id) = 0;
1403 now = time(NULL);
1404
1405 for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) {
1406 if (!((level & lvl) && (area->is_type & lvl)))
1407 continue;
1408
1409 if (postpone) {
1410 monotime(&area->last_lsp_refresh_event[lvl - 1]);
1411 }
1412
1413 sched_debug(
1414 "ISIS (%s): Checking whether L%d needs to be scheduled",
1415 area->area_tag, lvl);
1416
1417 if (area->lsp_regenerate_pending[lvl - 1]) {
1418 struct timeval remain = thread_timer_remain(
1419 area->t_lsp_refresh[lvl - 1]);
1420 sched_debug(
1421 "ISIS (%s): Regeneration is already pending, nothing todo."
1422 " (Due in %lld.%03lld seconds)",
1423 area->area_tag, (long long)remain.tv_sec,
1424 (long long)remain.tv_usec / 1000);
1425 continue;
1426 }
1427
1428 lsp = lsp_search(id, area->lspdb[lvl - 1]);
1429 if (!lsp) {
1430 sched_debug(
1431 "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.",
1432 area->area_tag);
1433 continue;
1434 }
1435
1436 /*
1437 * Throttle avoidance
1438 */
1439 sched_debug(
1440 "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld",
1441 area->area_tag, (long long)lsp->last_generated,
1442 (long long)now);
1443 THREAD_TIMER_OFF(area->t_lsp_refresh[lvl - 1]);
1444 diff = now - lsp->last_generated;
1445 if (diff < area->lsp_gen_interval[lvl - 1]) {
1446 timeout =
1447 1000 * (area->lsp_gen_interval[lvl - 1] - diff);
1448 sched_debug(
1449 "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval",
1450 area->area_tag, timeout);
1451 } else {
1452 /*
1453 * lsps are not regenerated if lsp_regenerate function
1454 * is called
1455 * directly. However if the lsp_regenerate call is
1456 * queued for
1457 * later execution it works.
1458 */
1459 timeout = 100;
1460 sched_debug(
1461 "ISIS (%s): Last generation was more than lsp_gen_interval ago."
1462 " Scheduling for execution in %ld ms.",
1463 area->area_tag, timeout);
1464 }
1465
1466 area->lsp_regenerate_pending[lvl - 1] = 1;
1467 thread_add_timer_msec(master, lsp_refresh,
1468 &area->lsp_refresh_arg[lvl - 1],
1469 timeout,
1470 &area->t_lsp_refresh[lvl - 1]);
1471 }
1472
1473 if (all_pseudo) {
1474 for (ALL_LIST_ELEMENTS_RO(area->circuit_list, cnode, circuit))
1475 lsp_regenerate_schedule_pseudo(circuit, level);
1476 }
1477
1478 return ISIS_OK;
1479 }
1480
1481 /*
1482 * Funcs for pseudonode LSPs
1483 */
1484
1485 /*
1486 * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs
1487 */
1488 static void lsp_build_pseudo(struct isis_lsp *lsp, struct isis_circuit *circuit,
1489 int level)
1490 {
1491 struct isis_adjacency *adj;
1492 struct list *adj_list;
1493 struct listnode *node;
1494 struct isis_area *area = circuit->area;
1495
1496 lsp_clear_data(lsp);
1497 lsp->tlvs = isis_alloc_tlvs();
1498 lsp_debug(
1499 "ISIS (%s): Constructing pseudo LSP %s for interface %s level %d",
1500 area->area_tag, rawlspid_print(lsp->hdr.lsp_id),
1501 circuit->interface->name, level);
1502
1503 lsp->level = level;
1504 /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
1505 lsp->hdr.lsp_bits =
1506 lsp_bits_generate(level, 0, circuit->area->attached_bit);
1507
1508 /*
1509 * add self to IS neighbours
1510 */
1511 uint8_t ne_id[ISIS_SYS_ID_LEN + 1];
1512
1513 memcpy(ne_id, isis->sysid, ISIS_SYS_ID_LEN);
1514 LSP_PSEUDO_ID(ne_id) = 0;
1515
1516 if (circuit->area->oldmetric) {
1517 isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0);
1518 lsp_debug(
1519 "ISIS (%s): Adding %s.%02x as old-style neighbor (self)",
1520 area->area_tag, sysid_print(ne_id),
1521 LSP_PSEUDO_ID(ne_id));
1522 }
1523 if (circuit->area->newmetric) {
1524 isis_tlvs_add_extended_reach(lsp->tlvs, ISIS_MT_IPV4_UNICAST,
1525 ne_id, 0, NULL, 0);
1526 lsp_debug(
1527 "ISIS (%s): Adding %s.%02x as te-style neighbor (self)",
1528 area->area_tag, sysid_print(ne_id),
1529 LSP_PSEUDO_ID(ne_id));
1530 }
1531
1532 adj_list = list_new();
1533 isis_adj_build_up_list(circuit->u.bc.adjdb[level - 1], adj_list);
1534
1535 for (ALL_LIST_ELEMENTS_RO(adj_list, node, adj)) {
1536 if (!(adj->level & level)) {
1537 lsp_debug(
1538 "ISIS (%s): Ignoring neighbor %s, level does not intersect",
1539 area->area_tag, sysid_print(adj->sysid));
1540 continue;
1541 }
1542
1543 if (!(level == IS_LEVEL_1
1544 && adj->sys_type == ISIS_SYSTYPE_L1_IS)
1545 && !(level == IS_LEVEL_1
1546 && adj->sys_type == ISIS_SYSTYPE_L2_IS
1547 && adj->adj_usage == ISIS_ADJ_LEVEL1AND2)
1548 && !(level == IS_LEVEL_2
1549 && adj->sys_type == ISIS_SYSTYPE_L2_IS)) {
1550 lsp_debug(
1551 "ISIS (%s): Ignoring neighbor %s, level does not match",
1552 area->area_tag, sysid_print(adj->sysid));
1553 continue;
1554 }
1555
1556 memcpy(ne_id, adj->sysid, ISIS_SYS_ID_LEN);
1557 if (circuit->area->oldmetric) {
1558 isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0);
1559 lsp_debug(
1560 "ISIS (%s): Adding %s.%02x as old-style neighbor (peer)",
1561 area->area_tag, sysid_print(ne_id),
1562 LSP_PSEUDO_ID(ne_id));
1563 }
1564 if (circuit->area->newmetric) {
1565 isis_tlvs_add_extended_reach(lsp->tlvs,
1566 ISIS_MT_IPV4_UNICAST,
1567 ne_id, 0, NULL, 0);
1568 lsp_debug(
1569 "ISIS (%s): Adding %s.%02x as te-style neighbor (peer)",
1570 area->area_tag, sysid_print(ne_id),
1571 LSP_PSEUDO_ID(ne_id));
1572 }
1573 }
1574 list_delete(&adj_list);
1575 return;
1576 }
1577
1578 int lsp_generate_pseudo(struct isis_circuit *circuit, int level)
1579 {
1580 dict_t *lspdb = circuit->area->lspdb[level - 1];
1581 struct isis_lsp *lsp;
1582 uint8_t lsp_id[ISIS_SYS_ID_LEN + 2];
1583 uint16_t rem_lifetime, refresh_time;
1584
1585 if ((circuit->is_type & level) != level
1586 || (circuit->state != C_STATE_UP)
1587 || (circuit->circ_type != CIRCUIT_T_BROADCAST)
1588 || (circuit->u.bc.is_dr[level - 1] == 0))
1589 return ISIS_ERROR;
1590
1591 memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN);
1592 LSP_FRAGMENT(lsp_id) = 0;
1593 LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id;
1594
1595 /*
1596 * If for some reason have a pseudo LSP in the db already -> regenerate
1597 */
1598 if (lsp_search(lsp_id, lspdb))
1599 return lsp_regenerate_schedule_pseudo(circuit, level);
1600
1601 rem_lifetime = lsp_rem_lifetime(circuit->area, level);
1602 /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
1603 lsp = lsp_new(circuit->area, lsp_id, rem_lifetime, 1,
1604 circuit->area->is_type | circuit->area->attached_bit, 0,
1605 NULL, level);
1606 lsp->area = circuit->area;
1607
1608 lsp_build_pseudo(lsp, circuit, level);
1609 lsp_pack_pdu(lsp);
1610 lsp->own_lsp = 1;
1611 lsp_insert(lsp, lspdb);
1612 lsp_flood(lsp, NULL);
1613
1614 refresh_time = lsp_refresh_time(lsp, rem_lifetime);
1615 THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[level - 1]);
1616 circuit->lsp_regenerate_pending[level - 1] = 0;
1617 if (level == IS_LEVEL_1)
1618 thread_add_timer(
1619 master, lsp_l1_refresh_pseudo, circuit, refresh_time,
1620 &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]);
1621 else if (level == IS_LEVEL_2)
1622 thread_add_timer(
1623 master, lsp_l2_refresh_pseudo, circuit, refresh_time,
1624 &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]);
1625
1626 if (isis->debugs & DEBUG_UPDATE_PACKETS) {
1627 zlog_debug(
1628 "ISIS-Upd (%s): Built L%d Pseudo LSP %s, len %" PRIu16
1629 ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16
1630 ", lifetime %" PRIu16 "s, refresh %" PRIu16 "s",
1631 circuit->area->area_tag, level,
1632 rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len,
1633 lsp->hdr.seqno, lsp->hdr.checksum,
1634 lsp->hdr.rem_lifetime, refresh_time);
1635 }
1636
1637 return ISIS_OK;
1638 }
1639
1640 static int lsp_regenerate_pseudo(struct isis_circuit *circuit, int level)
1641 {
1642 dict_t *lspdb = circuit->area->lspdb[level - 1];
1643 struct isis_lsp *lsp;
1644 uint8_t lsp_id[ISIS_SYS_ID_LEN + 2];
1645 uint16_t rem_lifetime, refresh_time;
1646
1647 if ((circuit->is_type & level) != level
1648 || (circuit->state != C_STATE_UP)
1649 || (circuit->circ_type != CIRCUIT_T_BROADCAST)
1650 || (circuit->u.bc.is_dr[level - 1] == 0))
1651 return ISIS_ERROR;
1652
1653 memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN);
1654 LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id;
1655 LSP_FRAGMENT(lsp_id) = 0;
1656
1657 lsp = lsp_search(lsp_id, lspdb);
1658
1659 if (!lsp) {
1660 flog_err(EC_LIB_DEVELOPMENT,
1661 "lsp_regenerate_pseudo: no l%d LSP %s found!", level,
1662 rawlspid_print(lsp_id));
1663 return ISIS_ERROR;
1664 }
1665
1666 rem_lifetime = lsp_rem_lifetime(circuit->area, level);
1667 lsp->hdr.rem_lifetime = rem_lifetime;
1668 lsp_build_pseudo(lsp, circuit, level);
1669 lsp_inc_seqno(lsp, 0);
1670 lsp->last_generated = time(NULL);
1671 lsp_flood(lsp, NULL);
1672
1673 refresh_time = lsp_refresh_time(lsp, rem_lifetime);
1674 if (level == IS_LEVEL_1)
1675 thread_add_timer(
1676 master, lsp_l1_refresh_pseudo, circuit, refresh_time,
1677 &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]);
1678 else if (level == IS_LEVEL_2)
1679 thread_add_timer(
1680 master, lsp_l2_refresh_pseudo, circuit, refresh_time,
1681 &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]);
1682
1683 if (isis->debugs & DEBUG_UPDATE_PACKETS) {
1684 zlog_debug(
1685 "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %s, len %" PRIu16
1686 ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16
1687 ", lifetime %" PRIu16 "s, refresh %" PRIu16 "s",
1688 circuit->area->area_tag, level,
1689 rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len,
1690 lsp->hdr.seqno, lsp->hdr.checksum,
1691 lsp->hdr.rem_lifetime, refresh_time);
1692 }
1693
1694 return ISIS_OK;
1695 }
1696
1697 /*
1698 * Something has changed or periodic refresh -> regenerate pseudo LSP
1699 */
1700 static int lsp_l1_refresh_pseudo(struct thread *thread)
1701 {
1702 struct isis_circuit *circuit;
1703 uint8_t id[ISIS_SYS_ID_LEN + 2];
1704
1705 circuit = THREAD_ARG(thread);
1706
1707 circuit->u.bc.t_refresh_pseudo_lsp[0] = NULL;
1708 circuit->lsp_regenerate_pending[0] = 0;
1709
1710 if ((circuit->u.bc.is_dr[0] == 0)
1711 || (circuit->is_type & IS_LEVEL_1) == 0) {
1712 memcpy(id, isis->sysid, ISIS_SYS_ID_LEN);
1713 LSP_PSEUDO_ID(id) = circuit->circuit_id;
1714 LSP_FRAGMENT(id) = 0;
1715 lsp_purge_pseudo(id, circuit, IS_LEVEL_1);
1716 return ISIS_ERROR;
1717 }
1718
1719 return lsp_regenerate_pseudo(circuit, IS_LEVEL_1);
1720 }
1721
1722 static int lsp_l2_refresh_pseudo(struct thread *thread)
1723 {
1724 struct isis_circuit *circuit;
1725 uint8_t id[ISIS_SYS_ID_LEN + 2];
1726
1727 circuit = THREAD_ARG(thread);
1728
1729 circuit->u.bc.t_refresh_pseudo_lsp[1] = NULL;
1730 circuit->lsp_regenerate_pending[1] = 0;
1731
1732 if ((circuit->u.bc.is_dr[1] == 0)
1733 || (circuit->is_type & IS_LEVEL_2) == 0) {
1734 memcpy(id, isis->sysid, ISIS_SYS_ID_LEN);
1735 LSP_PSEUDO_ID(id) = circuit->circuit_id;
1736 LSP_FRAGMENT(id) = 0;
1737 lsp_purge_pseudo(id, circuit, IS_LEVEL_2);
1738 return ISIS_ERROR;
1739 }
1740
1741 return lsp_regenerate_pseudo(circuit, IS_LEVEL_2);
1742 }
1743
1744 int lsp_regenerate_schedule_pseudo(struct isis_circuit *circuit, int level)
1745 {
1746 struct isis_lsp *lsp;
1747 uint8_t lsp_id[ISIS_SYS_ID_LEN + 2];
1748 time_t now, diff;
1749 long timeout;
1750 int lvl;
1751 struct isis_area *area = circuit->area;
1752
1753 if (circuit->circ_type != CIRCUIT_T_BROADCAST
1754 || circuit->state != C_STATE_UP)
1755 return ISIS_OK;
1756
1757 sched_debug(
1758 "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s",
1759 area->area_tag, circuit_t2string(level),
1760 circuit->interface->name);
1761
1762 memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN);
1763 LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id;
1764 LSP_FRAGMENT(lsp_id) = 0;
1765 now = time(NULL);
1766
1767 for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) {
1768 sched_debug(
1769 "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled",
1770 area->area_tag, lvl);
1771
1772 if (!((level & lvl) && (circuit->is_type & lvl))) {
1773 sched_debug("ISIS (%s): Level is not active on circuit",
1774 area->area_tag);
1775 continue;
1776 }
1777
1778 if (circuit->u.bc.is_dr[lvl - 1] == 0) {
1779 sched_debug(
1780 "ISIS (%s): This IS is not DR, nothing to do.",
1781 area->area_tag);
1782 continue;
1783 }
1784
1785 if (circuit->lsp_regenerate_pending[lvl - 1]) {
1786 struct timeval remain = thread_timer_remain(
1787 circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]);
1788 sched_debug(
1789 "ISIS (%s): Regenerate is already pending, nothing todo."
1790 " (Due in %lld.%03lld seconds)",
1791 area->area_tag, (long long)remain.tv_sec,
1792 (long long)remain.tv_usec / 1000);
1793 continue;
1794 }
1795
1796 lsp = lsp_search(lsp_id, circuit->area->lspdb[lvl - 1]);
1797 if (!lsp) {
1798 sched_debug(
1799 "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.",
1800 area->area_tag);
1801 continue;
1802 }
1803
1804 /*
1805 * Throttle avoidance
1806 */
1807 sched_debug(
1808 "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld",
1809 area->area_tag, (long long)lsp->last_generated,
1810 (long long)now);
1811 THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]);
1812 diff = now - lsp->last_generated;
1813 if (diff < circuit->area->lsp_gen_interval[lvl - 1]) {
1814 timeout =
1815 1000 * (circuit->area->lsp_gen_interval[lvl - 1]
1816 - diff);
1817 sched_debug(
1818 "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval",
1819 area->area_tag, timeout);
1820 } else {
1821 timeout = 100;
1822 sched_debug(
1823 "ISIS (%s): Last generation was more than lsp_gen_interval ago."
1824 " Scheduling for execution in %ld ms.",
1825 area->area_tag, timeout);
1826 }
1827
1828 circuit->lsp_regenerate_pending[lvl - 1] = 1;
1829
1830 if (lvl == IS_LEVEL_1) {
1831 thread_add_timer_msec(
1832 master, lsp_l1_refresh_pseudo, circuit, timeout,
1833 &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]);
1834 } else if (lvl == IS_LEVEL_2) {
1835 thread_add_timer_msec(
1836 master, lsp_l2_refresh_pseudo, circuit, timeout,
1837 &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]);
1838 }
1839 }
1840
1841 return ISIS_OK;
1842 }
1843
1844 /*
1845 * Walk through LSPs for an area
1846 * - set remaining lifetime
1847 */
1848 int lsp_tick(struct thread *thread)
1849 {
1850 struct isis_area *area;
1851 struct isis_lsp *lsp;
1852 dnode_t *dnode, *dnode_next;
1853 int level;
1854 uint16_t rem_lifetime;
1855 bool fabricd_sync_incomplete = false;
1856
1857 area = THREAD_ARG(thread);
1858 assert(area);
1859 area->t_tick = NULL;
1860 thread_add_timer(master, lsp_tick, area, 1, &area->t_tick);
1861
1862 struct isis_circuit *fabricd_init_c = fabricd_initial_sync_circuit(area);
1863
1864 /*
1865 * Remove LSPs which have aged out
1866 */
1867 for (level = 0; level < ISIS_LEVELS; level++) {
1868 if (area->lspdb[level] && dict_count(area->lspdb[level]) > 0) {
1869 for (dnode = dict_first(area->lspdb[level]);
1870 dnode != NULL; dnode = dnode_next) {
1871 dnode_next =
1872 dict_next(area->lspdb[level], dnode);
1873 lsp = dnode_get(dnode);
1874
1875 /*
1876 * The lsp rem_lifetime is kept at 0 for MaxAge
1877 * or
1878 * ZeroAgeLifetime depending on explicit purge
1879 * or
1880 * natural age out. So schedule spf only once
1881 * when
1882 * the first time rem_lifetime becomes 0.
1883 */
1884 rem_lifetime = lsp->hdr.rem_lifetime;
1885 lsp_set_time(lsp);
1886
1887 /*
1888 * Schedule may run spf which should be done
1889 * only after
1890 * the lsp rem_lifetime becomes 0 for the first
1891 * time.
1892 * ISO 10589 - 7.3.16.4 first paragraph.
1893 */
1894 if (rem_lifetime == 1 && lsp->hdr.seqno != 0) {
1895 /* 7.3.16.4 a) set SRM flags on all */
1896 /* 7.3.16.4 b) retain only the header */
1897 if (lsp->area->purge_originator)
1898 lsp_purge(lsp, lsp->level, NULL);
1899 else
1900 lsp_flood(lsp, NULL);
1901 /* 7.3.16.4 c) record the time to purge
1902 * FIXME */
1903 isis_spf_schedule(lsp->area, lsp->level);
1904 }
1905
1906 if (lsp->age_out == 0) {
1907 zlog_debug(
1908 "ISIS-Upd (%s): L%u LSP %s seq "
1909 "0x%08" PRIx32 " aged out",
1910 area->area_tag, lsp->level,
1911 rawlspid_print(lsp->hdr.lsp_id),
1912 lsp->hdr.seqno);
1913 lsp_destroy(lsp);
1914 lsp = NULL;
1915 dict_delete_free(area->lspdb[level],
1916 dnode);
1917 }
1918
1919 if (fabricd_init_c && lsp) {
1920 fabricd_sync_incomplete |=
1921 ISIS_CHECK_FLAG(lsp->SSNflags,
1922 fabricd_init_c);
1923 }
1924 }
1925 }
1926 }
1927
1928 if (fabricd_init_c
1929 && !fabricd_sync_incomplete
1930 && !isis_tx_queue_len(fabricd_init_c->tx_queue)) {
1931 fabricd_initial_sync_finish(area);
1932 }
1933
1934 return ISIS_OK;
1935 }
1936
1937 void lsp_purge_pseudo(uint8_t *id, struct isis_circuit *circuit, int level)
1938 {
1939 struct isis_lsp *lsp;
1940
1941 lsp = lsp_search(id, circuit->area->lspdb[level - 1]);
1942 if (!lsp)
1943 return;
1944
1945 lsp_purge(lsp, level, NULL);
1946 }
1947
1948 /*
1949 * Purge own LSP that is received and we don't have.
1950 * -> Do as in 7.3.16.4
1951 */
1952 void lsp_purge_non_exist(int level, struct isis_lsp_hdr *hdr,
1953 struct isis_area *area)
1954 {
1955 struct isis_lsp *lsp;
1956
1957 /*
1958 * We need to create the LSP to be purged
1959 */
1960 lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp));
1961 lsp->area = area;
1962 lsp->level = level;
1963 lsp_adjust_stream(lsp);
1964 lsp->age_out = ZERO_AGE_LIFETIME;
1965
1966 memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr));
1967 lsp->hdr.rem_lifetime = 0;
1968
1969 lsp_purge_add_poi(lsp, NULL);
1970
1971 lsp_pack_pdu(lsp);
1972
1973 lsp_insert(lsp, area->lspdb[lsp->level - 1]);
1974 lsp_flood(lsp, NULL);
1975
1976 return;
1977 }
1978
1979 void lsp_set_all_srmflags(struct isis_lsp *lsp, bool set)
1980 {
1981 struct listnode *node;
1982 struct isis_circuit *circuit;
1983
1984 assert(lsp);
1985
1986 if (!lsp->area)
1987 return;
1988
1989 struct list *circuit_list = lsp->area->circuit_list;
1990 for (ALL_LIST_ELEMENTS_RO(circuit_list, node, circuit)) {
1991 if (set) {
1992 isis_tx_queue_add(circuit->tx_queue, lsp,
1993 TX_LSP_NORMAL);
1994 } else {
1995 isis_tx_queue_del(circuit->tx_queue, lsp);
1996 }
1997 }
1998 }
1999
2000 void lsp_flood(struct isis_lsp *lsp, struct isis_circuit *circuit)
2001 {
2002 if (!fabricd)
2003 lsp_set_all_srmflags(lsp, true);
2004 else
2005 fabricd_lsp_flood(lsp);
2006
2007 if (circuit)
2008 isis_tx_queue_del(circuit->tx_queue, lsp);
2009 }
2010
2011 static int lsp_handle_adj_state_change(struct isis_adjacency *adj)
2012 {
2013 lsp_regenerate_schedule(adj->circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0);
2014 return 0;
2015 }
2016
2017 void lsp_init(void)
2018 {
2019 hook_register(isis_adj_state_change_hook,
2020 lsp_handle_adj_state_change);
2021 }
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