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Merge pull request #7832 from pjdruddy/snmp-test-infra
[mirror_frr.git] / isisd / isis_pdu.c
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eb5d44eb 1/*
d62a17ae 2 * IS-IS Rout(e)ing protocol - isis_pdu.c
eb5d44eb 3 * PDU processing
4 *
5 * Copyright (C) 2001,2002 Sampo Saaristo
d62a17ae 6 * Tampere University of Technology
eb5d44eb 7 * Institute of Communications Engineering
8 *
d62a17ae 9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public Licenseas published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
eb5d44eb 12 * any later version.
13 *
d62a17ae 14 * This program is distributed in the hope that it will be useful,but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
eb5d44eb 17 * more details.
896014f4
DL		 18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; see the file COPYING; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
eb5d44eb 22 */
23
eb5d44eb 24#include <zebra.h>
eb5d44eb 25
26#include "memory.h"
27#include "thread.h"
28#include "linklist.h"
29#include "log.h"
30#include "stream.h"
31#include "vty.h"
3f045a08 32#include "hash.h"
eb5d44eb 33#include "prefix.h"
34#include "if.h"
6a270cd9 35#include "checksum.h"
3f045a08 36#include "md5.h"
38937bd5 37#include "lib_errors.h"
eb5d44eb 38
eb5d44eb 39#include "isisd/isis_constants.h"
40#include "isisd/isis_common.h"
3f045a08 41#include "isisd/isis_flags.h"
eb5d44eb 42#include "isisd/isis_adjacency.h"
43#include "isisd/isis_circuit.h"
44#include "isisd/isis_network.h"
45#include "isisd/isis_misc.h"
46#include "isisd/isis_dr.h"
eb5d44eb 47#include "isisd/isisd.h"
48#include "isisd/isis_dynhn.h"
49#include "isisd/isis_lsp.h"
50#include "isisd/isis_pdu.h"
51#include "isisd/iso_checksum.h"
52#include "isisd/isis_csm.h"
53#include "isisd/isis_events.h"
f8c06e2c 54#include "isisd/isis_te.h"
99894f9a 55#include "isisd/isis_mt.h"
841791b6 56#include "isisd/isis_tlvs.h"
54ece698 57#include "isisd/isis_errors.h"
8e6fb83b 58#include "isisd/fabricd.h"
9b39405f 59#include "isisd/isis_tx_queue.h"
39bb53d6 60#include "isisd/isis_pdu_counter.h"
2a1c520e 61#include "isisd/isis_nb.h"
eb5d44eb 62
af8ac8f9
CF		 63static int ack_lsp(struct isis_lsp_hdr *hdr, struct isis_circuit *circuit,
64 int level)
eb5d44eb 65{
af8ac8f9
CF		 66 unsigned long lenp;
67 int retval;
d7c0a89a 68 uint16_t length;
af8ac8f9
CF		 69 uint8_t pdu_type =
70 (level == IS_LEVEL_1) ? L1_PARTIAL_SEQ_NUM : L2_PARTIAL_SEQ_NUM;
d62a17ae 71
af8ac8f9 72 isis_circuit_stream(circuit, &circuit->snd_stream);
3f045a08 73
af8ac8f9 74 fill_fixed_hdr(pdu_type, circuit->snd_stream);
d62a17ae 75
af8ac8f9 76 lenp = stream_get_endp(circuit->snd_stream);
eab88f36 77
af8ac8f9 78 stream_putw(circuit->snd_stream, 0); /* PDU length */
99e5d4af 79 stream_put(circuit->snd_stream, circuit->isis->sysid, ISIS_SYS_ID_LEN);
af8ac8f9
CF		 80 stream_putc(circuit->snd_stream, circuit->idx);
81 stream_putc(circuit->snd_stream, 9); /* code */
82 stream_putc(circuit->snd_stream, 16); /* len */
d62a17ae 83
af8ac8f9
CF		 84 stream_putw(circuit->snd_stream, hdr->rem_lifetime);
85 stream_put(circuit->snd_stream, hdr->lsp_id, ISIS_SYS_ID_LEN + 2);
86 stream_putl(circuit->snd_stream, hdr->seqno);
87 stream_putw(circuit->snd_stream, hdr->checksum);
3f045a08 88
d7c0a89a 89 length = (uint16_t)stream_get_endp(circuit->snd_stream);
af8ac8f9
CF		 90 /* Update PDU length */
91 stream_putw_at(circuit->snd_stream, lenp, length);
3f045a08 92
39bb53d6 93 pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type);
af8ac8f9
CF		 94 retval = circuit->tx(circuit, level);
95 if (retval != ISIS_OK)
1a7ecb96 96 flog_err(EC_ISIS_PACKET,
1c50c1c0
QY		 97 "ISIS-Upd (%s): Send L%d LSP PSNP on %s failed",
98 circuit->area->area_tag, level,
99 circuit->interface->name);
d62a17ae 100
101 return retval;
eb5d44eb 102}
103
eb5d44eb 104/*
d62a17ae 105 * RECEIVE SIDE
eb5d44eb 106 */
107
0c1bd758
CF		 108struct iih_info {
109 struct isis_circuit *circuit;
d7c0a89a 110 uint8_t *ssnpa;
0c1bd758 111 int level;
eb5d44eb 112
0c1bd758
CF		 113 uint8_t circ_type;
114 uint8_t sys_id[ISIS_SYS_ID_LEN];
115 uint16_t holdtime;
116 uint16_t pdu_len;
d62a17ae 117
0c1bd758 118 uint8_t circuit_id;
eb5d44eb 119
0c1bd758
CF		 120 uint8_t priority;
121 uint8_t dis[ISIS_SYS_ID_LEN + 1];
d8fba7d9 122
0c1bd758
CF		 123 bool v4_usable;
124 bool v6_usable;
eb5d44eb 125
0c1bd758
CF		 126 struct isis_tlvs *tlvs;
127};
eb5d44eb 128
0c1bd758
CF		 129static int process_p2p_hello(struct iih_info *iih)
130{
42fe2621 131 struct isis_threeway_adj *tw_adj = iih->tlvs->threeway_adj;
eab88f36 132
42fe2621
CF		 133 if (tw_adj) {
134 if (tw_adj->state > ISIS_THREEWAY_DOWN) {
e740f9c1 135 if (IS_DEBUG_ADJ_PACKETS) {
9165c5f5 136 zlog_debug("ISIS-Adj (%s): Rcvd P2P IIH from (%s) with invalid three-way state: %d",
42fe2621
CF		 137 iih->circuit->area->area_tag,
138 iih->circuit->interface->name,
139 tw_adj->state);
140 }
141 return ISIS_WARNING;
142 }
143
144 if (tw_adj->neighbor_set
99e5d4af
DS		 145 && (memcmp(tw_adj->neighbor_id, iih->circuit->isis->sysid,
146 ISIS_SYS_ID_LEN)
eab88f36
K		 147 || tw_adj->neighbor_circuit_id
148 != (uint32_t)iih->circuit->idx)) {
42fe2621 149
e740f9c1 150 if (IS_DEBUG_ADJ_PACKETS) {
9165c5f5 151 zlog_debug("ISIS-Adj (%s): Rcvd P2P IIH from (%s) which lists IS/Circuit different from us as neighbor.",
42fe2621
CF		 152 iih->circuit->area->area_tag,
153 iih->circuit->interface->name);
154 }
155
156 return ISIS_WARNING;
157 }
158 }
159
d62a17ae 160 /*
161 * My interpertation of the ISO, if no adj exists we will create one for
162 * the circuit
163 */
0c1bd758 164 struct isis_adjacency *adj = iih->circuit->u.p2p.neighbor;
d62a17ae 165 /* If an adjacency exists, check it is with the source of the hello
166 * packets */
167 if (adj) {
0c1bd758 168 if (memcmp(iih->sys_id, adj->sysid, ISIS_SYS_ID_LEN)) {
d62a17ae 169 zlog_debug(
170 "hello source and adjacency do not match, set adj down\n");
16167b31 171 isis_adj_state_change(&adj, ISIS_ADJ_DOWN,
d62a17ae 172 "adj do not exist");
0c1bd758 173 return ISIS_OK;
f390d2c7 174 }
d62a17ae 175 }
0c1bd758 176 if (!adj || adj->level != iih->circ_type) {
d62a17ae 177 if (!adj) {
0c1bd758
CF		 178 adj = isis_new_adj(iih->sys_id, NULL, iih->circ_type,
179 iih->circuit);
d62a17ae 180 } else {
0c1bd758 181 adj->level = iih->circ_type;
f390d2c7 182 }
0c1bd758 183 iih->circuit->u.p2p.neighbor = adj;
d62a17ae 184 /* Build lsp with the new neighbor entry when a new
185 * adjacency is formed. Set adjacency circuit type to
186 * IIH PDU header circuit type before lsp is regenerated
187 * when an adjacency is up. This will result in the new
188 * adjacency entry getting added to the lsp tlv neighbor list.
189 */
0c1bd758 190 adj->circuit_t = iih->circ_type;
16167b31 191 isis_adj_state_change(&adj, ISIS_ADJ_INITIALIZING, NULL);
d62a17ae 192 adj->sys_type = ISIS_SYSTYPE_UNKNOWN;
f390d2c7 193 }
eb5d44eb 194
df04b6af 195 if (tw_adj)
42fe2621
CF		 196 adj->ext_circuit_id = tw_adj->local_circuit_id;
197
d62a17ae 198 /* 8.2.6 Monitoring point-to-point adjacencies */
0c1bd758 199 adj->hold_time = iih->holdtime;
d62a17ae 200 adj->last_upd = time(NULL);
201
0c1bd758
CF		 202 bool changed;
203 isis_tlvs_to_adj(iih->tlvs, adj, &changed);
204 changed |= tlvs_to_adj_mt_set(iih->tlvs, iih->v4_usable, iih->v6_usable,
205 adj);
d62a17ae 206
d62a17ae 207 /* lets take care of the expiry */
50478845 208 thread_cancel(&adj->t_expire);
d62a17ae 209 thread_add_timer(master, isis_adj_expire, adj, (long)adj->hold_time,
210 &adj->t_expire);
211
8e6fb83b
CF		 212 /* While fabricds initial sync is in progress, ignore hellos from other
213 * interfaces than the one we are performing the initial sync on. */
214 if (fabricd_initial_sync_is_in_progress(iih->circuit->area)
215 && fabricd_initial_sync_circuit(iih->circuit->area) != iih->circuit)
216 return ISIS_OK;
217
d62a17ae 218 /* 8.2.5.2 a) a match was detected */
0c1bd758
CF		 219 if (isis_tlvs_area_addresses_match(iih->tlvs,
220 iih->circuit->area->area_addrs)) {
d62a17ae 221 /* 8.2.5.2 a) 2) If the system is L1 - table 5 */
0c1bd758
CF		 222 if (iih->circuit->area->is_type == IS_LEVEL_1) {
223 switch (iih->circ_type) {
d62a17ae 224 case IS_LEVEL_1:
225 case IS_LEVEL_1_AND_2:
42fe2621
CF		 226 if (adj->adj_state != ISIS_ADJ_UP
227 || adj->adj_usage == ISIS_ADJ_LEVEL1) {
228 isis_adj_process_threeway(adj, tw_adj,
229 ISIS_ADJ_LEVEL1);
d62a17ae 230 }
231 break;
232 case IS_LEVEL_2:
233 if (adj->adj_state != ISIS_ADJ_UP) {
234 /* (7) reject - wrong system type event
235 */
236 zlog_warn("wrongSystemType");
0c1bd758 237 return ISIS_WARNING;
d62a17ae 238 } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) {
239 /* (6) down - wrong system */
16167b31 240 isis_adj_state_change(&adj,
d62a17ae 241 ISIS_ADJ_DOWN,
242 "Wrong System");
243 }
244 break;
245 }
f390d2c7 246 }
d62a17ae 247
248 /* 8.2.5.2 a) 3) If the system is L1L2 - table 6 */
0c1bd758
CF		 249 if (iih->circuit->area->is_type == IS_LEVEL_1_AND_2) {
250 switch (iih->circ_type) {
d62a17ae 251 case IS_LEVEL_1:
42fe2621
CF		 252 if (adj->adj_state != ISIS_ADJ_UP
253 || adj->adj_usage == ISIS_ADJ_LEVEL1) {
254 isis_adj_process_threeway(adj, tw_adj,
255 ISIS_ADJ_LEVEL1);
d62a17ae 256 } else if ((adj->adj_usage
257 == ISIS_ADJ_LEVEL1AND2)
258 || (adj->adj_usage
259 == ISIS_ADJ_LEVEL2)) {
260 /* (8) down - wrong system */
16167b31 261 isis_adj_state_change(&adj,
d62a17ae 262 ISIS_ADJ_DOWN,
263 "Wrong System");
264 }
265 break;
266 case IS_LEVEL_2:
42fe2621
CF		 267 if (adj->adj_state != ISIS_ADJ_UP
268 || adj->adj_usage == ISIS_ADJ_LEVEL2) {
269 isis_adj_process_threeway(adj, tw_adj,
270 ISIS_ADJ_LEVEL2);
d62a17ae 271 } else if ((adj->adj_usage == ISIS_ADJ_LEVEL1)
272 || (adj->adj_usage
273 == ISIS_ADJ_LEVEL1AND2)) {
274 /* (8) down - wrong system */
16167b31 275 isis_adj_state_change(&adj,
d62a17ae 276 ISIS_ADJ_DOWN,
277 "Wrong System");
d62a17ae 278 }
279 break;
280 case IS_LEVEL_1_AND_2:
42fe2621
CF		 281 if (adj->adj_state != ISIS_ADJ_UP
282 || adj->adj_usage == ISIS_ADJ_LEVEL1AND2) {
283 isis_adj_process_threeway(adj, tw_adj,
284 ISIS_ADJ_LEVEL1AND2);
d62a17ae 285 } else if ((adj->adj_usage == ISIS_ADJ_LEVEL1)
286 || (adj->adj_usage
287 == ISIS_ADJ_LEVEL2)) {
288 /* (8) down - wrong system */
16167b31 289 isis_adj_state_change(&adj,
d62a17ae 290 ISIS_ADJ_DOWN,
291 "Wrong System");
d62a17ae 292 }
293 break;
294 }
f390d2c7 295 }
d62a17ae 296
297 /* 8.2.5.2 a) 4) If the system is L2 - table 7 */
0c1bd758
CF		 298 if (iih->circuit->area->is_type == IS_LEVEL_2) {
299 switch (iih->circ_type) {
d62a17ae 300 case IS_LEVEL_1:
301 if (adj->adj_state != ISIS_ADJ_UP) {
302 /* (5) reject - wrong system type event
303 */
304 zlog_warn("wrongSystemType");
0c1bd758 305 return ISIS_WARNING;
d62a17ae 306 } else if ((adj->adj_usage
307 == ISIS_ADJ_LEVEL1AND2)
308 || (adj->adj_usage
309 == ISIS_ADJ_LEVEL2)) {
310 /* (6) down - wrong system */
16167b31 311 isis_adj_state_change(&adj,
d62a17ae 312 ISIS_ADJ_DOWN,
313 "Wrong System");
314 }
315 break;
316 case IS_LEVEL_1_AND_2:
317 case IS_LEVEL_2:
42fe2621
CF		 318 if (adj->adj_state != ISIS_ADJ_UP
319 || adj->adj_usage == ISIS_ADJ_LEVEL2) {
320 isis_adj_process_threeway(adj, tw_adj,
321 ISIS_ADJ_LEVEL2);
d62a17ae 322 } else if (adj->adj_usage
323 == ISIS_ADJ_LEVEL1AND2) {
324 /* (6) down - wrong system */
16167b31 325 isis_adj_state_change(&adj,
d62a17ae 326 ISIS_ADJ_DOWN,
327 "Wrong System");
d62a17ae 328 }
329 break;
330 }
f390d2c7 331 }
d62a17ae 332 }
333 /* 8.2.5.2 b) if no match was detected */
0c1bd758
CF		 334 else if (listcount(iih->circuit->area->area_addrs) > 0) {
335 if (iih->circuit->area->is_type == IS_LEVEL_1) {
d62a17ae 336 /* 8.2.5.2 b) 1) is_type L1 and adj is not up */
337 if (adj->adj_state != ISIS_ADJ_UP) {
16167b31 338 isis_adj_state_change(&adj, ISIS_ADJ_DOWN,
d62a17ae 339 "Area Mismatch");
340 /* 8.2.5.2 b) 2)is_type L1 and adj is up */
341 } else {
16167b31 342 isis_adj_state_change(&adj, ISIS_ADJ_DOWN,
d62a17ae 343 "Down - Area Mismatch");
344 }
f390d2c7 345 }
d62a17ae 346 /* 8.2.5.2 b 3 If the system is L2 or L1L2 - table 8 */
347 else {
0c1bd758 348 switch (iih->circ_type) {
d62a17ae 349 case IS_LEVEL_1:
350 if (adj->adj_state != ISIS_ADJ_UP) {
351 /* (6) reject - Area Mismatch event */
352 zlog_warn("AreaMismatch");
0c1bd758 353 return ISIS_WARNING;
d62a17ae 354 } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) {
355 /* (7) down - area mismatch */
16167b31 356 isis_adj_state_change(&adj,
d62a17ae 357 ISIS_ADJ_DOWN,
358 "Area Mismatch");
359
360 } else if ((adj->adj_usage
361 == ISIS_ADJ_LEVEL1AND2)
362 || (adj->adj_usage
363 == ISIS_ADJ_LEVEL2)) {
364 /* (7) down - wrong system */
16167b31 365 isis_adj_state_change(&adj,
d62a17ae 366 ISIS_ADJ_DOWN,
367 "Wrong System");
368 }
369 break;
370 case IS_LEVEL_1_AND_2:
371 case IS_LEVEL_2:
42fe2621
CF		 372 if (adj->adj_state != ISIS_ADJ_UP
373 || adj->adj_usage == ISIS_ADJ_LEVEL2) {
374 isis_adj_process_threeway(adj, tw_adj,
375 ISIS_ADJ_LEVEL2);
d62a17ae 376 } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) {
377 /* (7) down - wrong system */
16167b31 378 isis_adj_state_change(&adj,
d62a17ae 379 ISIS_ADJ_DOWN,
380 "Wrong System");
381 } else if (adj->adj_usage
382 == ISIS_ADJ_LEVEL1AND2) {
0c1bd758 383 if (iih->circ_type == IS_LEVEL_2) {
d62a17ae 384 /* (7) down - wrong system */
385 isis_adj_state_change(
16167b31 386 &adj, ISIS_ADJ_DOWN,
d62a17ae 387 "Wrong System");
388 } else {
389 /* (7) down - area mismatch */
390 isis_adj_state_change(
16167b31 391 &adj, ISIS_ADJ_DOWN,
d62a17ae 392 "Area Mismatch");
393 }
d62a17ae 394 }
395 break;
396 }
f390d2c7 397 }
d62a17ae 398 } else {
399 /* down - area mismatch */
16167b31 400 isis_adj_state_change(&adj, ISIS_ADJ_DOWN, "Area Mismatch");
f390d2c7 401 }
d8fba7d9 402
16167b31
DS		 403 if (adj) {
404 if (adj->adj_state == ISIS_ADJ_UP && changed) {
405 lsp_regenerate_schedule(
406 adj->circuit->area,
407 isis_adj_usage2levels(adj->adj_usage), 0);
408 }
eb5d44eb 409
16167b31
DS		 410 /* 8.2.5.2 c) if the action was up - comparing circuit IDs */
411 /* FIXME - Missing parts */
d62a17ae 412
16167b31
DS		 413 /* some of my own understanding of the ISO, why the heck does
414 * it not say what should I change the system_type to...
415 */
416 switch (adj->adj_usage) {
417 case ISIS_ADJ_LEVEL1:
418 adj->sys_type = ISIS_SYSTYPE_L1_IS;
419 break;
420 case ISIS_ADJ_LEVEL2:
421 adj->sys_type = ISIS_SYSTYPE_L2_IS;
422 break;
423 case ISIS_ADJ_LEVEL1AND2:
424 adj->sys_type = ISIS_SYSTYPE_L2_IS;
425 break;
426 case ISIS_ADJ_NONE:
427 adj->sys_type = ISIS_SYSTYPE_UNKNOWN;
428 break;
429 }
d62a17ae 430 }
eb5d44eb 431
e740f9c1 432 if (IS_DEBUG_ADJ_PACKETS) {
d62a17ae 433 zlog_debug(
6cde4b45 434 "ISIS-Adj (%s): Rcvd P2P IIH from (%s), cir type %s, cir id %hhu, length %hu",
0c1bd758
CF		 435 iih->circuit->area->area_tag,
436 iih->circuit->interface->name,
437 circuit_t2string(iih->circuit->is_type),
438 iih->circuit->circuit_id, iih->pdu_len);
d62a17ae 439 }
eb5d44eb 440
0c1bd758 441 return ISIS_OK;
eb5d44eb 442}
443
0c1bd758 444static int process_lan_hello(struct iih_info *iih)
eb5d44eb 445{
d62a17ae 446 struct isis_adjacency *adj;
0c1bd758
CF		 447 adj = isis_adj_lookup(iih->sys_id,
448 iih->circuit->u.bc.adjdb[iih->level - 1]);
449 if ((adj == NULL) || (memcmp(adj->snpa, iih->ssnpa, ETH_ALEN))
450 || (adj->level != iih->level)) {
451 if (!adj) {
452 /* Do as in 8.4.2.5 */
453 adj = isis_new_adj(iih->sys_id, iih->ssnpa, iih->level,
454 iih->circuit);
455 } else {
456 if (iih->ssnpa) {
457 memcpy(adj->snpa, iih->ssnpa, 6);
458 } else {
459 memset(adj->snpa, ' ', 6);
460 }
461 adj->level = iih->level;
462 }
16167b31 463 isis_adj_state_change(&adj, ISIS_ADJ_INITIALIZING, NULL);
d62a17ae 464
0c1bd758
CF		 465 if (iih->level == IS_LEVEL_1)
466 adj->sys_type = ISIS_SYSTYPE_L1_IS;
467 else
468 adj->sys_type = ISIS_SYSTYPE_L2_IS;
469 list_delete_all_node(
470 iih->circuit->u.bc.lan_neighs[iih->level - 1]);
471 isis_adj_build_neigh_list(
472 iih->circuit->u.bc.adjdb[iih->level - 1],
473 iih->circuit->u.bc.lan_neighs[iih->level - 1]);
474 }
475
476 if (adj->dis_record[iih->level - 1].dis == ISIS_IS_DIS) {
d7c0a89a
QY		 477 uint8_t *dis = (iih->level == 1)
478 ? iih->circuit->u.bc.l1_desig_is
479 : iih->circuit->u.bc.l2_desig_is;
0c1bd758
CF		 480
481 if (memcmp(dis, iih->dis, ISIS_SYS_ID_LEN + 1)) {
482 thread_add_event(master, isis_event_dis_status_change,
483 iih->circuit, 0, NULL);
484 memcpy(dis, iih->dis, ISIS_SYS_ID_LEN + 1);
485 }
d62a17ae 486 }
3f045a08 487
0c1bd758
CF		 488 adj->circuit_t = iih->circ_type;
489 adj->hold_time = iih->holdtime;
490 adj->last_upd = time(NULL);
491 adj->prio[iih->level - 1] = iih->priority;
492 memcpy(adj->lanid, iih->dis, ISIS_SYS_ID_LEN + 1);
3f045a08 493
0c1bd758
CF		 494 bool changed;
495 isis_tlvs_to_adj(iih->tlvs, adj, &changed);
496 changed |= tlvs_to_adj_mt_set(iih->tlvs, iih->v4_usable, iih->v6_usable,
497 adj);
498
499 /* lets take care of the expiry */
50478845 500 thread_cancel(&adj->t_expire);
0c1bd758
CF		 501 thread_add_timer(master, isis_adj_expire, adj, (long)adj->hold_time,
502 &adj->t_expire);
503
504 /*
505 * If the snpa for this circuit is found from LAN Neighbours TLV
506 * we have two-way communication -> adjacency can be put to state "up"
507 */
508 bool own_snpa_found =
509 isis_tlvs_own_snpa_found(iih->tlvs, iih->circuit->u.bc.snpa);
510
511 if (adj->adj_state != ISIS_ADJ_UP) {
512 if (own_snpa_found) {
513 isis_adj_state_change(
16167b31 514 &adj, ISIS_ADJ_UP,
0c1bd758
CF		 515 "own SNPA found in LAN Neighbours TLV");
516 }
517 } else {
518 if (!own_snpa_found) {
519 isis_adj_state_change(
16167b31 520 &adj, ISIS_ADJ_INITIALIZING,
0c1bd758
CF		 521 "own SNPA not found in LAN Neighbours TLV");
522 }
d62a17ae 523 }
eb5d44eb 524
0c1bd758
CF		 525 if (adj->adj_state == ISIS_ADJ_UP && changed)
526 lsp_regenerate_schedule(adj->circuit->area, iih->level, 0);
527
e740f9c1 528 if (IS_DEBUG_ADJ_PACKETS) {
d62a17ae 529 zlog_debug(
0c1bd758
CF		 530 "ISIS-Adj (%s): Rcvd L%d LAN IIH from %s on %s, cirType %s, cirID %u, length %zd",
531 iih->circuit->area->area_tag, iih->level,
532 snpa_print(iih->ssnpa), iih->circuit->interface->name,
533 circuit_t2string(iih->circuit->is_type),
534 iih->circuit->circuit_id,
535 stream_get_endp(iih->circuit->rcv_stream));
d62a17ae 536 }
0c1bd758
CF		 537 return ISIS_OK;
538}
eb5d44eb 539
17c9dcd5
CF		 540static int pdu_len_validate(uint16_t pdu_len, struct isis_circuit *circuit)
541{
542 if (pdu_len < stream_get_getp(circuit->rcv_stream)
543 || pdu_len > ISO_MTU(circuit)
544 || pdu_len > stream_get_endp(circuit->rcv_stream))
545 return 1;
546
547 if (pdu_len < stream_get_endp(circuit->rcv_stream))
548 stream_set_endp(circuit->rcv_stream, pdu_len);
549 return 0;
550}
551
0c1bd758 552static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit,
d7c0a89a 553 uint8_t *ssnpa)
0c1bd758 554{
3380c990
EDP		 555 /* keep a copy of the raw pdu for NB notifications */
556 size_t pdu_start = stream_get_getp(circuit->rcv_stream);
557 size_t pdu_end = stream_get_endp(circuit->rcv_stream);
558 char raw_pdu[pdu_end - pdu_start];
0c1bd758
CF		 559 bool p2p_hello = (pdu_type == P2P_HELLO);
560 int level = p2p_hello ? 0
561 : (pdu_type == L1_LAN_HELLO) ? ISIS_LEVEL1
562 : ISIS_LEVEL2;
563 const char *pdu_name =
564 p2p_hello
565 ? "P2P IIH"
566 : (level == ISIS_LEVEL1) ? "L1 LAN IIH" : "L2 LAN IIH";
567
3380c990
EDP		 568 stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start,
569 pdu_end - pdu_start);
e740f9c1 570 if (IS_DEBUG_ADJ_PACKETS) {
0c1bd758
CF		 571 zlog_debug("ISIS-Adj (%s): Rcvd %s on %s, cirType %s, cirID %u",
572 circuit->area->area_tag, pdu_name,
573 circuit->interface->name,
574 circuit_t2string(circuit->is_type),
575 circuit->circuit_id);
e740f9c1 576 if (IS_DEBUG_PACKET_DUMP)
0c1bd758
CF		 577 zlog_dump_data(STREAM_DATA(circuit->rcv_stream),
578 stream_get_endp(circuit->rcv_stream));
579 }
580
581 if (p2p_hello) {
582 if (circuit->circ_type != CIRCUIT_T_P2P) {
583 zlog_warn("p2p hello on non p2p circuit");
c32496ee 584 circuit->rej_adjacencies++;
af6911c9
EDP		 585#ifndef FABRICD
586 isis_notif_reject_adjacency(
587 circuit, "p2p hello on non p2p circuit",
588 raw_pdu);
589#endif /* ifndef FABRICD */
0c1bd758
CF		 590 return ISIS_WARNING;
591 }
592 } else {
593 if (circuit->circ_type != CIRCUIT_T_BROADCAST) {
594 zlog_warn("lan hello on non broadcast circuit");
c32496ee 595 circuit->rej_adjacencies++;
af6911c9
EDP		 596#ifndef FABRICD
597 isis_notif_reject_adjacency(
598 circuit, "lan hello on non broadcast circuit",
599 raw_pdu);
600#endif /* ifndef FABRICD */
0c1bd758
CF		 601 return ISIS_WARNING;
602 }
603
604 if (circuit->ext_domain) {
d62a17ae 605 zlog_debug(
0c1bd758
CF		 606 "level %d LAN Hello received over circuit with externalDomain = true",
607 level);
c32496ee 608 circuit->rej_adjacencies++;
af6911c9
EDP		 609#ifndef FABRICD
610 isis_notif_reject_adjacency(
611 circuit,
612 "LAN Hello received over circuit with externalDomain = true",
613 raw_pdu);
614#endif /* ifndef FABRICD */
0c1bd758
CF		 615 return ISIS_WARNING;
616 }
617
af8ac8f9 618 if (!(circuit->is_type & level)) {
e740f9c1 619 if (IS_DEBUG_ADJ_PACKETS) {
0c1bd758
CF		 620 zlog_debug(
621 "ISIS-Adj (%s): Interface level mismatch, %s",
622 circuit->area->area_tag,
623 circuit->interface->name);
624 }
c32496ee 625 circuit->rej_adjacencies++;
af6911c9
EDP		 626#ifndef FABRICD
627 isis_notif_reject_adjacency(
628 circuit, "Interface level mismatch", raw_pdu);
629#endif /* ifndef FABRICD */
0c1bd758 630 return ISIS_WARNING;
d62a17ae 631 }
f390d2c7 632 }
eb5d44eb 633
0c1bd758
CF		 634 struct iih_info iih = {
635 .circuit = circuit, .ssnpa = ssnpa, .level = level};
636
637 /* Generic IIH Header */
638 iih.circ_type = stream_getc(circuit->rcv_stream) & 0x03;
639 stream_get(iih.sys_id, circuit->rcv_stream, ISIS_SYS_ID_LEN);
640 iih.holdtime = stream_getw(circuit->rcv_stream);
641 iih.pdu_len = stream_getw(circuit->rcv_stream);
642
643 if (p2p_hello) {
644 iih.circuit_id = stream_getc(circuit->rcv_stream);
645 } else {
646 iih.priority = stream_getc(circuit->rcv_stream);
647 stream_get(iih.dis, circuit->rcv_stream, ISIS_SYS_ID_LEN + 1);
f390d2c7 648 }
0c1bd758 649
17c9dcd5 650 if (pdu_len_validate(iih.pdu_len, circuit)) {
d62a17ae 651 zlog_warn(
6cde4b45 652 "ISIS-Adj (%s): Rcvd %s from (%s) with invalid pdu length %hu",
0c1bd758
CF		 653 circuit->area->area_tag, pdu_name,
654 circuit->interface->name, iih.pdu_len);
c32496ee 655 circuit->rej_adjacencies++;
af6911c9
EDP		 656#ifndef FABRICD
657 isis_notif_reject_adjacency(circuit, "Invalid PDU length",
658 raw_pdu);
659#endif /* ifndef FABRICD */
d62a17ae 660 return ISIS_WARNING;
661 }
3f045a08 662
0c1bd758 663 if (!p2p_hello && !(level & iih.circ_type)) {
1a7ecb96 664 flog_err(EC_ISIS_PACKET,
1c50c1c0
QY		 665 "Level %d LAN Hello with Circuit Type %d", level,
666 iih.circ_type);
c32496ee 667 circuit->rej_adjacencies++;
af6911c9
EDP		 668#ifndef FABRICD
669 isis_notif_reject_adjacency(
670 circuit, "LAN Hello with wrong IS-level", raw_pdu);
671#endif /* ifndef FABRICD */
d62a17ae 672 return ISIS_ERROR;
673 }
3f045a08 674
0c1bd758
CF		 675 const char *error_log;
676 int retval = ISIS_WARNING;
d62a17ae 677
0c1bd758
CF		 678 if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream),
679 circuit->rcv_stream, &iih.tlvs, &error_log)) {
680 zlog_warn("isis_unpack_tlvs() failed: %s", error_log);
c32496ee 681 circuit->rej_adjacencies++;
af6911c9
EDP		 682#ifndef FABRICD
683 isis_notif_reject_adjacency(circuit, "Failed to unpack TLVs",
684 raw_pdu);
685#endif /* ifndef FABRICD */
d62a17ae 686 goto out;
687 }
eb5d44eb 688
0c1bd758
CF		 689 if (!iih.tlvs->area_addresses.count) {
690 zlog_warn("No Area addresses TLV in %s", pdu_name);
9d92b84b
EDP		 691#ifndef FABRICD
692 /* send northbound notification */
693 isis_notif_area_mismatch(circuit, raw_pdu);
694#endif /* ifndef FABRICD */
d62a17ae 695 goto out;
696 }
f390d2c7 697
0c1bd758
CF		 698 if (!iih.tlvs->protocols_supported.count) {
699 zlog_warn("No supported protocols TLV in %s", pdu_name);
c32496ee 700 circuit->rej_adjacencies++;
af6911c9
EDP		 701#ifndef FABRICD
702 isis_notif_reject_adjacency(
703 circuit, "No supported protocols TLV", raw_pdu);
704#endif /* ifndef FABRICD */
d62a17ae 705 goto out;
706 }
b72f345d 707
3380c990
EDP		 708 int auth_code = isis_tlvs_auth_is_valid(iih.tlvs, &circuit->passwd,
709 circuit->rcv_stream, false);
710 if (auth_code != ISIS_AUTH_OK) {
0c1bd758
CF		 711 isis_event_auth_failure(circuit->area->area_tag,
712 "IIH authentication failure",
713 iih.sys_id);
3380c990
EDP		 714#ifndef FABRICD
715 /* send northbound notification */
716 stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start,
717 pdu_end - pdu_start);
c32496ee
RW		 718 if (auth_code == ISIS_AUTH_FAILURE) {
719 circuit->auth_failures++;
3380c990 720 isis_notif_authentication_failure(circuit, raw_pdu);
c32496ee
RW		 721 } else { /* AUTH_TYPE_FAILURE or NO_VALIDATOR */
722 circuit->auth_type_failures++;
3380c990
EDP		 723 isis_notif_authentication_type_failure(circuit,
724 raw_pdu);
c32496ee 725 }
3380c990 726#endif /* ifndef FABRICD */
0c1bd758 727 goto out;
d62a17ae 728 }
eb5d44eb 729
99e5d4af 730 if (!memcmp(iih.sys_id, circuit->isis->sysid, ISIS_SYS_ID_LEN)) {
0c1bd758
CF		 731 zlog_warn(
732 "ISIS-Adj (%s): Received IIH with own sysid - discard",
733 circuit->area->area_tag);
c32496ee 734 circuit->rej_adjacencies++;
af6911c9
EDP		 735#ifndef FABRICD
736 isis_notif_reject_adjacency(
737 circuit, "Received IIH with our own sysid", raw_pdu);
738#endif /* ifndef FABRICD */
0c1bd758 739 goto out;
d62a17ae 740 }
19f78ceb 741
0c1bd758
CF		 742 if (!p2p_hello
743 && (listcount(circuit->area->area_addrs) == 0
744 || (level == ISIS_LEVEL1
745 && !isis_tlvs_area_addresses_match(
746 iih.tlvs, circuit->area->area_addrs)))) {
e740f9c1 747 if (IS_DEBUG_ADJ_PACKETS) {
d62a17ae 748 zlog_debug(
749 "ISIS-Adj (%s): Area mismatch, level %d IIH on %s",
750 circuit->area->area_tag, level,
751 circuit->interface->name);
752 }
9d92b84b
EDP		 753#ifndef FABRICD
754 /* send northbound notification */
755 isis_notif_area_mismatch(circuit, raw_pdu);
756#endif /* ifndef FABRICD */
d62a17ae 757 goto out;
f390d2c7 758 }
eb5d44eb 759
41415888 760 iih.v4_usable = (fabricd_ip_addrs(circuit)
0c1bd758 761 && iih.tlvs->ipv4_address.count);
d62a17ae 762
0c1bd758
CF		 763 iih.v6_usable = (circuit->ipv6_link && listcount(circuit->ipv6_link)
764 && iih.tlvs->ipv6_address.count);
28a8cfcb 765
c9b0e434 766 if (!iih.v4_usable && !iih.v6_usable) {
e740f9c1 767 if (IS_DEBUG_ADJ_PACKETS) {
c9b0e434
CF		 768 zlog_warn(
769 "ISIS-Adj (%s): Neither IPv4 nor IPv6 considered usable. Ignoring IIH",
770 circuit->area->area_tag);
771 }
c32496ee 772 circuit->rej_adjacencies++;
af6911c9
EDP		 773#ifndef FABRICD
774 isis_notif_reject_adjacency(
775 circuit, "Neither IPv4 not IPv6 considered usable",
776 raw_pdu);
777#endif /* ifndef FABRICD */
d62a17ae 778 goto out;
c9b0e434 779 }
d8fba7d9 780
0c1bd758 781 retval = p2p_hello ? process_p2p_hello(&iih) : process_lan_hello(&iih);
f390d2c7 782out:
0c1bd758 783 isis_free_tlvs(iih.tlvs);
eb5d44eb 784
d62a17ae 785 return retval;
eb5d44eb 786}
787
a6b60da9
CF		 788static void lsp_flood_or_update(struct isis_lsp *lsp,
789 struct isis_circuit *circuit,
790 bool circuit_scoped)
791{
89cdc4df 792 if (!circuit_scoped)
a6b60da9 793 lsp_flood(lsp, circuit);
89cdc4df 794 else
a6b60da9 795 fabricd_update_lsp_no_flood(lsp, circuit);
a6b60da9
CF		 796}
797
eb5d44eb 798/*
799 * Process Level 1/2 Link State
800 * ISO - 10589
801 * Section 7.3.15.1 - Action on receipt of a link state PDU
f390d2c7 802 */
af8ac8f9 803static int process_lsp(uint8_t pdu_type, struct isis_circuit *circuit,
9b39405f 804 const uint8_t *ssnpa, uint8_t max_area_addrs)
eb5d44eb 805{
1cbd5b37
CF		 806 int level;
807 bool circuit_scoped;
3380c990
EDP		 808 size_t pdu_start = stream_get_getp(circuit->rcv_stream);
809 size_t pdu_end = stream_get_endp(circuit->rcv_stream);
810 char raw_pdu[pdu_end - pdu_start];
811
812 stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start,
813 pdu_end - pdu_start);
1cbd5b37
CF		 814
815 if (pdu_type == FS_LINK_STATE) {
816 if (!fabricd)
817 return ISIS_ERROR;
818 if (max_area_addrs != L2_CIRCUIT_FLOODING_SCOPE)
819 return ISIS_ERROR;
820 level = ISIS_LEVEL2;
821 circuit_scoped = true;
822
823 /* The stream is used verbatim for sending out new LSPDUs.
824 * So make sure we store it as an L2 LSPDU internally.
825 * (compare for the reverse in `send_lsp`) */
826 stream_putc_at(circuit->rcv_stream, 4, L2_LINK_STATE);
827 stream_putc_at(circuit->rcv_stream, 7, 0);
828 } else {
829 if (pdu_type == L1_LINK_STATE)
830 level = ISIS_LEVEL1;
831 else
832 level = ISIS_LEVEL2;
833 circuit_scoped = false;
834 }
d62a17ae 835
e740f9c1 836 if (IS_DEBUG_UPDATE_PACKETS) {
d62a17ae 837 zlog_debug(
1cbd5b37
CF		 838 "ISIS-Upd (%s): Rcvd %sL%d LSP on %s, cirType %s, cirID %u",
839 circuit->area->area_tag,
840 circuit_scoped ? "Circuit scoped " : "", level,
d62a17ae 841 circuit->interface->name,
842 circuit_t2string(circuit->is_type),
843 circuit->circuit_id);
e740f9c1 844 if (IS_DEBUG_PACKET_DUMP)
d62a17ae 845 zlog_dump_data(STREAM_DATA(circuit->rcv_stream),
846 stream_get_endp(circuit->rcv_stream));
847 }
f390d2c7 848
3e300703 849 struct isis_lsp_hdr hdr = {};
eb5d44eb 850
af8ac8f9
CF		 851 hdr.pdu_len = stream_getw(circuit->rcv_stream);
852 hdr.rem_lifetime = stream_getw(circuit->rcv_stream);
853 stream_get(hdr.lsp_id, circuit->rcv_stream, sizeof(hdr.lsp_id));
854 hdr.seqno = stream_getl(circuit->rcv_stream);
855 hdr.checksum = stream_getw(circuit->rcv_stream);
856 hdr.lsp_bits = stream_getc(circuit->rcv_stream);
eb5d44eb 857
8375020a
EDP		 858#ifndef FABRICD
859 /* send northbound notification */
860 isis_notif_lsp_received(circuit, rawlspid_print(hdr.lsp_id), hdr.seqno,
861 time(NULL), sysid_print(hdr.lsp_id));
862#endif /* ifndef FABRICD */
863
af8ac8f9 864 if (pdu_len_validate(hdr.pdu_len, circuit)) {
6cde4b45 865 zlog_debug("ISIS-Upd (%s): LSP %s invalid LSP length %hu",
af8ac8f9
CF		 866 circuit->area->area_tag, rawlspid_print(hdr.lsp_id),
867 hdr.pdu_len);
d62a17ae 868 return ISIS_WARNING;
f390d2c7 869 }
d62a17ae 870
e740f9c1 871 if (IS_DEBUG_UPDATE_PACKETS) {
6cde4b45 872 zlog_debug("ISIS-Upd (%s): Rcvd L%d LSP %s, seq 0x%08x, cksum 0x%04hx, lifetime %hus, len %hu, on %s",
af8ac8f9
CF		 873 circuit->area->area_tag, level,
874 rawlspid_print(hdr.lsp_id), hdr.seqno, hdr.checksum,
875 hdr.rem_lifetime, hdr.pdu_len,
876 circuit->interface->name);
f390d2c7 877 }
d62a17ae 878
879 /* lsp is_type check */
af8ac8f9
CF		 880 if ((hdr.lsp_bits & IS_LEVEL_1) != IS_LEVEL_1) {
881 zlog_debug(
47b13e9b 882 "ISIS-Upd (%s): LSP %s invalid LSP is type 0x%x",
af8ac8f9
CF		 883 circuit->area->area_tag, rawlspid_print(hdr.lsp_id),
884 hdr.lsp_bits & IS_LEVEL_1_AND_2);
d62a17ae 885 /* continue as per RFC1122 Be liberal in what you accept, and
886 * conservative in what you send */
f390d2c7 887 }
d62a17ae 888
889 /* Checksum sanity check - FIXME: move to correct place */
890 /* 12 = sysid+pdu+remtime */
af8ac8f9
CF		 891 if (iso_csum_verify(STREAM_DATA(circuit->rcv_stream) + 12,
892 hdr.pdu_len - 12, hdr.checksum, 12)) {
893 zlog_debug(
6cde4b45 894 "ISIS-Upd (%s): LSP %s invalid LSP checksum 0x%04hx",
af8ac8f9
CF		 895 circuit->area->area_tag, rawlspid_print(hdr.lsp_id),
896 hdr.checksum);
d62a17ae 897 return ISIS_WARNING;
f390d2c7 898 }
3f045a08 899
d62a17ae 900 /* 7.3.15.1 a) 1 - external domain circuit will discard lsps */
901 if (circuit->ext_domain) {
902 zlog_debug(
3efd0893 903 "ISIS-Upd (%s): LSP %s received at level %d over circuit with externalDomain = true",
af8ac8f9 904 circuit->area->area_tag, rawlspid_print(hdr.lsp_id),
d62a17ae 905 level);
d62a17ae 906 return ISIS_WARNING;
907 }
eb5d44eb 908
d62a17ae 909 /* 7.3.15.1 a) 2,3 - manualL2OnlyMode not implemented */
af8ac8f9 910 if (!(circuit->is_type & level)) {
d62a17ae 911 zlog_debug(
3efd0893 912 "ISIS-Upd (%s): LSP %s received at level %d over circuit of type %s",
af8ac8f9 913 circuit->area->area_tag, rawlspid_print(hdr.lsp_id),
d62a17ae 914 level, circuit_t2string(circuit->is_type));
d62a17ae 915 return ISIS_WARNING;
916 }
0250758d 917
af8ac8f9
CF		 918 struct isis_tlvs *tlvs = NULL;
919 int retval = ISIS_WARNING;
920 const char *error_log;
921
922 if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream),
923 circuit->rcv_stream, &tlvs, &error_log)) {
924 zlog_warn("Something went wrong unpacking the LSP: %s",
925 error_log);
86370604
EDP		 926#ifndef FABRICD
927 /* send northbound notification. Note that the tlv-type and
928 * offset cannot correctly be set here as they are not returned
929 * by isis_unpack_tlvs, but in there I cannot fire a
930 * notification because I have no circuit information. So until
931 * we change the code above to return those extra fields, we
932 * will send dummy values which are ignored in the callback
933 */
934 isis_notif_lsp_error(circuit, rawlspid_print(hdr.lsp_id),
935 raw_pdu, 0, 0);
936#endif /* ifndef FABRICD */
af8ac8f9
CF		 937 goto out;
938 }
939
d62a17ae 940 /* 7.3.15.1 a) 4 - need to make sure IDLength matches */
941
942 /* 7.3.15.1 a) 5 - maximum area match, can be ommited since we only use
943 * 3 */
944
945 /* 7.3.15.1 a) 7 - password check */
af8ac8f9
CF		 946 struct isis_passwd *passwd = (level == ISIS_LEVEL1)
947 ? &circuit->area->area_passwd
948 : &circuit->area->domain_passwd;
3380c990
EDP		 949 int auth_code = isis_tlvs_auth_is_valid(tlvs, passwd,
950 circuit->rcv_stream, true);
951 if (auth_code != ISIS_AUTH_OK) {
af8ac8f9
CF		 952 isis_event_auth_failure(circuit->area->area_tag,
953 "LSP authentication failure",
954 hdr.lsp_id);
3380c990
EDP		 955#ifndef FABRICD
956 /* send northbound notification */
c32496ee
RW		 957 if (auth_code == ISIS_AUTH_FAILURE) {
958 circuit->auth_failures++;
3380c990 959 isis_notif_authentication_failure(circuit, raw_pdu);
c32496ee
RW		 960 } else { /* AUTH_TYPE_FAILURE or NO_VALIDATOR */
961 circuit->auth_type_failures++;
3380c990
EDP		 962 isis_notif_authentication_type_failure(circuit,
963 raw_pdu);
c32496ee 964 }
3380c990 965#endif /* ifndef FABRICD */
af8ac8f9 966 goto out;
f390d2c7 967 }
af8ac8f9 968
d62a17ae 969 /* Find the LSP in our database and compare it to this Link State header
970 */
af8ac8f9 971 struct isis_lsp *lsp =
4bef0ec4 972 lsp_search(&circuit->area->lspdb[level - 1], hdr.lsp_id);
af8ac8f9 973 int comp = 0;
d62a17ae 974 if (lsp)
af8ac8f9
CF		 975 comp = lsp_compare(circuit->area->area_tag, lsp, hdr.seqno,
976 hdr.checksum, hdr.rem_lifetime);
d62a17ae 977 if (lsp && (lsp->own_lsp))
978 goto dontcheckadj;
979
980 /* 7.3.15.1 a) 6 - Must check that we have an adjacency of the same
981 * level */
982 /* for broadcast circuits, snpa should be compared */
983
984 if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
af8ac8f9
CF		 985 if (!isis_adj_lookup_snpa(ssnpa,
986 circuit->u.bc.adjdb[level - 1])) {
6cde4b45 987 zlog_debug("(%s): DS ======= LSP %s, seq 0x%08x, cksum 0x%04hx, lifetime %hus on %s",
af8ac8f9
CF		 988 circuit->area->area_tag,
989 rawlspid_print(hdr.lsp_id), hdr.seqno,
990 hdr.checksum, hdr.rem_lifetime,
991 circuit->interface->name);
992 goto out; /* Silently discard */
d62a17ae 993 }
994 }
995 /* for non broadcast, we just need to find same level adj */
996 else {
997 /* If no adj, or no sharing of level */
998 if (!circuit->u.p2p.neighbor) {
af8ac8f9
CF		 999 retval = ISIS_OK;
1000 goto out;
d62a17ae 1001 } else {
1002 if (((level == IS_LEVEL_1)
1003 && (circuit->u.p2p.neighbor->adj_usage
1004 == ISIS_ADJ_LEVEL2))
1005 || ((level == IS_LEVEL_2)
1006 && (circuit->u.p2p.neighbor->adj_usage
1007 == ISIS_ADJ_LEVEL1)))
af8ac8f9 1008 goto out;
f390d2c7 1009 }
f390d2c7 1010 }
f390d2c7 1011
af8ac8f9
CF		 1012 bool lsp_confusion;
1013
d62a17ae 1014dontcheckadj:
1015 /* 7.3.15.1 a) 7 - Passwords for level 1 - not implemented */
1016
1017 /* 7.3.15.1 a) 8 - Passwords for level 2 - not implemented */
1018
1019 /* 7.3.15.1 a) 9 - OriginatingLSPBufferSize - not implemented FIXME: do
1020 * it */
1021
1022 /* 7.3.16.2 - If this is an LSP from another IS with identical seq_num
1023 * but
1024 * wrong checksum, initiate a purge. */
af8ac8f9 1025 if (lsp && (lsp->hdr.seqno == hdr.seqno)
2c92bee4
CF		 1026 && (lsp->hdr.checksum != hdr.checksum)
1027 && hdr.rem_lifetime) {
6cde4b45 1028 zlog_warn("ISIS-Upd (%s): LSP %s seq 0x%08x with confused checksum received.",
af8ac8f9
CF		 1029 circuit->area->area_tag, rawlspid_print(hdr.lsp_id),
1030 hdr.seqno);
1031 hdr.rem_lifetime = 0;
1032 lsp_confusion = true;
d62a17ae 1033 } else
af8ac8f9 1034 lsp_confusion = false;
d62a17ae 1035
1036 /* 7.3.15.1 b) - If the remaining life time is 0, we perform 7.3.16.4 */
af8ac8f9 1037 if (hdr.rem_lifetime == 0) {
d62a17ae 1038 if (!lsp) {
1039 /* 7.3.16.4 a) 1) No LSP in db -> send an ack, but don't
1040 * save */
1041 /* only needed on explicit update, eg - p2p */
1042 if (circuit->circ_type == CIRCUIT_T_P2P)
af8ac8f9
CF		 1043 ack_lsp(&hdr, circuit, level);
1044 goto out; /* FIXME: do we need a purge? */
d62a17ae 1045 } else {
99e5d4af 1046 if (memcmp(hdr.lsp_id, circuit->isis->sysid,
eab88f36 1047 ISIS_SYS_ID_LEN)) {
d62a17ae 1048 /* LSP by some other system -> do 7.3.16.4 b) */
1049 /* 7.3.16.4 b) 1) */
1050 if (comp == LSP_NEWER) {
af8ac8f9
CF		 1051 lsp_update(lsp, &hdr, tlvs,
1052 circuit->rcv_stream,
164066e4
CF		 1053 circuit->area, level,
1054 lsp_confusion);
ebeae7d5
DS		 1055 if (lsp_confusion)
1056 isis_free_tlvs(tlvs);
af8ac8f9 1057 tlvs = NULL;
d62a17ae 1058 /* ii */
a6b60da9
CF		 1059 lsp_flood_or_update(lsp, NULL,
1060 circuit_scoped);
d62a17ae 1061 /* v */
1062 ISIS_FLAGS_CLEAR_ALL(
996c9314
LB		 1063 lsp->SSNflags); /* FIXME:
1064 OTHER
1065 than c
1066 */
d62a17ae 1067
1068 /* For the case of lsp confusion, flood
1069 * the purge back to its
1070 * originator so that it can react.
1071 * Otherwise, don't reflood
1072 * through incoming circuit as usual */
1073 if (!lsp_confusion) {
9b39405f
CF		 1074 isis_tx_queue_del(
1075 circuit->tx_queue,
1076 lsp);
1077
d62a17ae 1078 /* iv */
1079 if (circuit->circ_type
1080 != CIRCUIT_T_BROADCAST)
1081 ISIS_SET_FLAG(
1082 lsp->SSNflags,
1083 circuit);
1084 }
1085 } /* 7.3.16.4 b) 2) */
1086 else if (comp == LSP_EQUAL) {
1087 /* i */
9b39405f
CF		 1088 isis_tx_queue_del(circuit->tx_queue,
1089 lsp);
d62a17ae 1090 /* ii */
1091 if (circuit->circ_type
1092 != CIRCUIT_T_BROADCAST)
1093 ISIS_SET_FLAG(lsp->SSNflags,
1094 circuit);
1095 } /* 7.3.16.4 b) 3) */
1096 else {
9b39405f
CF		 1097 isis_tx_queue_add(circuit->tx_queue,
1098 lsp, TX_LSP_NORMAL);
d62a17ae 1099 ISIS_CLEAR_FLAG(lsp->SSNflags, circuit);
1100 }
af8ac8f9 1101 } else if (lsp->hdr.rem_lifetime != 0) {
d62a17ae 1102 /* our own LSP -> 7.3.16.4 c) */
1103 if (comp == LSP_NEWER) {
897989f8
EDP		 1104#ifndef FABRICD
1105 if (lsp->hdr.seqno < hdr.seqno) {
1106 /* send northbound
1107 * notification */
1108 isis_notif_seqno_skipped(
1109 circuit,
1110 rawlspid_print(
1111 hdr.lsp_id));
1112 }
1113#endif /* ifndef FABRICD */
af8ac8f9 1114 lsp_inc_seqno(lsp, hdr.seqno);
89cdc4df
RM		 1115 lsp_flood_or_update(lsp, NULL,
1116 circuit_scoped);
d62a17ae 1117 } else {
9b39405f
CF		 1118 isis_tx_queue_add(circuit->tx_queue,
1119 lsp, TX_LSP_NORMAL);
d62a17ae 1120 ISIS_CLEAR_FLAG(lsp->SSNflags, circuit);
1121 }
e740f9c1 1122 if (IS_DEBUG_UPDATE_PACKETS)
d62a17ae 1123 zlog_debug(
6cde4b45 1124 "ISIS-Upd (%s): (1) re-originating LSP %s new seq 0x%08x",
d62a17ae 1125 circuit->area->area_tag,
af8ac8f9
CF		 1126 rawlspid_print(hdr.lsp_id),
1127 lsp->hdr.seqno);
d32f213a
EDP		 1128 } else {
1129 /* our own LSP with 0 remaining life time */
1130#ifndef FABRICD
1131 /* send northbound notification */
1132 isis_notif_own_lsp_purge(
1133 circuit, rawlspid_print(hdr.lsp_id));
1134#endif /* ifndef FABRICD */
d62a17ae 1135 }
f390d2c7 1136 }
af8ac8f9 1137 goto out;
f390d2c7 1138 }
d62a17ae 1139 /* 7.3.15.1 c) - If this is our own lsp and we don't have it initiate a
1140 * purge */
99e5d4af 1141 if (memcmp(hdr.lsp_id, circuit->isis->sysid, ISIS_SYS_ID_LEN) == 0) {
d62a17ae 1142 if (!lsp) {
1143 /* 7.3.16.4: initiate a purge */
af8ac8f9
CF		 1144 lsp_purge_non_exist(level, &hdr, circuit->area);
1145 retval = ISIS_OK;
1146 goto out;
d62a17ae 1147 }
1148 /* 7.3.15.1 d) - If this is our own lsp and we have it */
1149
1150 /* In 7.3.16.1, If an Intermediate system R somewhere in the
1151 * domain
1152 * has information that the current sequence number for source S
1153 * is
1154 * "greater" than that held by S, ... */
1155
562d7ef7 1156 if (comp == LSP_NEWER) {
d62a17ae 1157 /* 7.3.16.1 */
af8ac8f9 1158 lsp_inc_seqno(lsp, hdr.seqno);
897989f8
EDP		 1159#ifndef FABRICD
1160 /* send northbound notification */
1161 isis_notif_seqno_skipped(circuit,
1162 rawlspid_print(hdr.lsp_id));
1163#endif /* ifndef FABRICD */
e740f9c1 1164 if (IS_DEBUG_UPDATE_PACKETS) {
d62a17ae 1165 zlog_debug(
6cde4b45 1166 "ISIS-Upd (%s): (2) re-originating LSP %s new seq 0x%08x",
d62a17ae 1167 circuit->area->area_tag,
af8ac8f9
CF		 1168 rawlspid_print(hdr.lsp_id),
1169 lsp->hdr.seqno);
562d7ef7
CF		 1170 }
1171 lsp_flood(lsp, NULL);
1172 } else if (comp == LSP_EQUAL) {
1173 isis_tx_queue_del(circuit->tx_queue, lsp);
1174 if (circuit->circ_type != CIRCUIT_T_BROADCAST)
1175 ISIS_SET_FLAG(lsp->SSNflags, circuit);
1176 } else {
1177 isis_tx_queue_add(circuit->tx_queue, lsp,
1178 TX_LSP_NORMAL);
1179 ISIS_CLEAR_FLAG(lsp->SSNflags, circuit);
d62a17ae 1180 }
d62a17ae 1181 } else {
1182 /* 7.3.15.1 e) - This lsp originated on another system */
1183
1184 /* 7.3.15.1 e) 1) LSP newer than the one in db or no LSP in db
1185 */
1186 if ((!lsp || comp == LSP_NEWER)) {
1187 /*
1188 * If this lsp is a frag, need to see if we have zero
1189 * lsp present
1190 */
af8ac8f9
CF		 1191 struct isis_lsp *lsp0 = NULL;
1192 if (LSP_FRAGMENT(hdr.lsp_id) != 0) {
1193 uint8_t lspid[ISIS_SYS_ID_LEN + 2];
1194 memcpy(lspid, hdr.lsp_id, ISIS_SYS_ID_LEN + 1);
d62a17ae 1195 LSP_FRAGMENT(lspid) = 0;
1196 lsp0 = lsp_search(
4bef0ec4 1197 &circuit->area->lspdb[level - 1], lspid);
d62a17ae 1198 if (!lsp0) {
1199 zlog_debug(
1200 "Got lsp frag, while zero lsp not in database");
df0ba689 1201 goto out;
d62a17ae 1202 }
1203 }
1204 /* i */
1205 if (!lsp) {
af8ac8f9
CF		 1206 lsp = lsp_new_from_recv(
1207 &hdr, tlvs, circuit->rcv_stream, lsp0,
d62a17ae 1208 circuit->area, level);
af8ac8f9 1209 tlvs = NULL;
4bef0ec4
DL		 1210 lsp_insert(&circuit->area->lspdb[level - 1],
1211 lsp);
d62a17ae 1212 } else /* exists, so we overwrite */
1213 {
af8ac8f9 1214 lsp_update(lsp, &hdr, tlvs, circuit->rcv_stream,
164066e4 1215 circuit->area, level, false);
af8ac8f9 1216 tlvs = NULL;
d62a17ae 1217 }
a6b60da9 1218 lsp_flood_or_update(lsp, circuit, circuit_scoped);
d62a17ae 1219
1220 /* iv */
1221 if (circuit->circ_type != CIRCUIT_T_BROADCAST)
1222 ISIS_SET_FLAG(lsp->SSNflags, circuit);
1223 /* FIXME: v) */
1224 }
1225 /* 7.3.15.1 e) 2) LSP equal to the one in db */
1226 else if (comp == LSP_EQUAL) {
9b39405f 1227 isis_tx_queue_del(circuit->tx_queue, lsp);
af8ac8f9 1228 lsp_update(lsp, &hdr, tlvs, circuit->rcv_stream,
164066e4 1229 circuit->area, level, false);
af8ac8f9 1230 tlvs = NULL;
d62a17ae 1231 if (circuit->circ_type != CIRCUIT_T_BROADCAST)
1232 ISIS_SET_FLAG(lsp->SSNflags, circuit);
1233 }
1234 /* 7.3.15.1 e) 3) LSP older than the one in db */
1235 else {
9b39405f
CF		 1236 isis_tx_queue_add(circuit->tx_queue, lsp,
1237 TX_LSP_NORMAL);
d62a17ae 1238 ISIS_CLEAR_FLAG(lsp->SSNflags, circuit);
1239 }
f390d2c7 1240 }
af8ac8f9
CF		 1241
1242 retval = ISIS_OK;
1243
1244out:
e923107c 1245 fabricd_trigger_csnp(circuit->area, circuit_scoped);
df0ba689 1246
af8ac8f9 1247 isis_free_tlvs(tlvs);
d62a17ae 1248 return retval;
eb5d44eb 1249}
1250
1251/*
1252 * Process Sequence Numbers
1253 * ISO - 10589
1254 * Section 7.3.15.2 - Action on receipt of a sequence numbers PDU
1255 */
1256
17c9dcd5 1257static int process_snp(uint8_t pdu_type, struct isis_circuit *circuit,
d7c0a89a 1258 const uint8_t *ssnpa)
eb5d44eb 1259{
3380c990
EDP		 1260#ifndef FABRICD
1261 size_t pdu_start = stream_get_getp(circuit->rcv_stream);
1262 size_t pdu_end = stream_get_endp(circuit->rcv_stream);
1263 char raw_pdu[pdu_end - pdu_start];
1264#endif /* ifndef FABRICD */
1265
17c9dcd5
CF		 1266 bool is_csnp = (pdu_type == L1_COMPLETE_SEQ_NUM
1267 || pdu_type == L2_COMPLETE_SEQ_NUM);
1268 char typechar = is_csnp ? 'C' : 'P';
1269 int level = (pdu_type == L1_COMPLETE_SEQ_NUM
1270 || pdu_type == L1_PARTIAL_SEQ_NUM)
1271 ? ISIS_LEVEL1
1272 : ISIS_LEVEL2;
1273
1274 uint16_t pdu_len = stream_getw(circuit->rcv_stream);
1275 uint8_t rem_sys_id[ISIS_SYS_ID_LEN];
3380c990 1276
17c9dcd5
CF		 1277 stream_get(rem_sys_id, circuit->rcv_stream, ISIS_SYS_ID_LEN);
1278 stream_forward_getp(circuit->rcv_stream, 1); /* Circuit ID - unused */
1279
3e300703
DL		 1280 uint8_t start_lsp_id[ISIS_SYS_ID_LEN + 2] = {};
1281 uint8_t stop_lsp_id[ISIS_SYS_ID_LEN + 2] = {};
17c9dcd5
CF		 1282
1283 if (is_csnp) {
1284 stream_get(start_lsp_id, circuit->rcv_stream,
1285 ISIS_SYS_ID_LEN + 2);
1286 stream_get(stop_lsp_id, circuit->rcv_stream,
1287 ISIS_SYS_ID_LEN + 2);
1288 }
1289
1290 if (pdu_len_validate(pdu_len, circuit)) {
1291 zlog_warn("Received a CSNP with bogus length %d", pdu_len);
1292 return ISIS_WARNING;
f390d2c7 1293 }
eb5d44eb 1294
e740f9c1 1295 if (IS_DEBUG_SNP_PACKETS) {
17c9dcd5
CF		 1296 zlog_debug(
1297 "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, cirType %s, cirID %u",
1298 circuit->area->area_tag, level, typechar,
1299 circuit->interface->name,
1300 circuit_t2string(circuit->is_type),
1301 circuit->circuit_id);
e740f9c1 1302 if (IS_DEBUG_PACKET_DUMP)
17c9dcd5
CF		 1303 zlog_dump_data(STREAM_DATA(circuit->rcv_stream),
1304 stream_get_endp(circuit->rcv_stream));
1305 }
eb5d44eb 1306
d62a17ae 1307 /* 7.3.15.2 a) 1 - external domain circuit will discard snp pdu */
1308 if (circuit->ext_domain) {
f390d2c7 1309
d62a17ae 1310 zlog_debug(
3efd0893 1311 "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, skipping: circuit externalDomain = true",
d62a17ae 1312 circuit->area->area_tag, level, typechar,
1313 circuit->interface->name);
f390d2c7 1314
d62a17ae 1315 return ISIS_OK;
1316 }
eb5d44eb 1317
d62a17ae 1318 /* 7.3.15.2 a) 2,3 - manualL2OnlyMode not implemented */
af8ac8f9 1319 if (!(circuit->is_type & level)) {
d62a17ae 1320 zlog_debug(
3efd0893 1321 "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, skipping: circuit type %s does not match level %d",
d62a17ae 1322 circuit->area->area_tag, level, typechar,
1323 circuit->interface->name,
1324 circuit_t2string(circuit->is_type), level);
eb5d44eb 1325
d62a17ae 1326 return ISIS_OK;
f390d2c7 1327 }
eb5d44eb 1328
d62a17ae 1329 /* 7.3.15.2 a) 4 - not applicable for CSNP only PSNPs on broadcast */
17c9dcd5
CF		 1330 if (!is_csnp && (circuit->circ_type == CIRCUIT_T_BROADCAST)
1331 && !circuit->u.bc.is_dr[level - 1]) {
d62a17ae 1332 zlog_debug(
3efd0893 1333 "ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s, skipping: we are not the DIS",
d62a17ae 1334 circuit->area->area_tag, level, typechar,
1335 snpa_print(ssnpa), circuit->interface->name);
1336
1337 return ISIS_OK;
1338 }
eb5d44eb 1339
d62a17ae 1340 /* 7.3.15.2 a) 5 - need to make sure IDLength matches - already checked
1341 */
1342
1343 /* 7.3.15.2 a) 6 - maximum area match, can be ommited since we only use
1344 * 3
1345 * - already checked */
1346
1347 /* 7.3.15.2 a) 7 - Must check that we have an adjacency of the same
1348 * level */
1349 /* for broadcast circuits, snpa should be compared */
1350 /* FIXME : Do we need to check SNPA? */
1351 if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
17c9dcd5
CF		 1352 if (!isis_adj_lookup(rem_sys_id,
1353 circuit->u.bc.adjdb[level - 1]))
d62a17ae 1354 return ISIS_OK; /* Silently discard */
1355 } else {
8e6fb83b 1356 if (!fabricd && !circuit->u.p2p.neighbor) {
d62a17ae 1357 zlog_warn("no p2p neighbor on circuit %s",
1358 circuit->interface->name);
1359 return ISIS_OK; /* Silently discard */
1360 }
1361 }
eb5d44eb 1362
17c9dcd5
CF		 1363 struct isis_tlvs *tlvs;
1364 int retval = ISIS_WARNING;
1365 const char *error_log;
eb5d44eb 1366
17c9dcd5
CF		 1367 if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream),
1368 circuit->rcv_stream, &tlvs, &error_log)) {
1369 zlog_warn("Something went wrong unpacking the SNP: %s",
1370 error_log);
1371 goto out;
f390d2c7 1372 }
eb5d44eb 1373
17c9dcd5
CF		 1374 struct isis_passwd *passwd = (level == IS_LEVEL_1)
1375 ? &circuit->area->area_passwd
1376 : &circuit->area->domain_passwd;
eab88f36 1377
3380c990
EDP		 1378 if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_RECV)) {
1379 int auth_code = isis_tlvs_auth_is_valid(
1380 tlvs, passwd, circuit->rcv_stream, false);
1381 if (auth_code != ISIS_AUTH_OK) {
1382 isis_event_auth_failure(circuit->area->area_tag,
1383 "SNP authentication failure",
1384 rem_sys_id);
1385#ifndef FABRICD
1386 /* send northbound notification */
1387 stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start,
1388 pdu_end - pdu_start);
c32496ee
RW		 1389 if (auth_code == ISIS_AUTH_FAILURE) {
1390 circuit->auth_failures++;
3380c990
EDP		 1391 isis_notif_authentication_failure(circuit,
1392 raw_pdu);
c32496ee
RW		 1393 } else { /* AUTH_TYPE_FAILURE or NO_VALIDATOR */
1394 circuit->auth_type_failures++;
3380c990
EDP		 1395 isis_notif_authentication_type_failure(circuit,
1396 raw_pdu);
c32496ee 1397 }
3380c990
EDP		 1398#endif /* ifndef FABRICD */
1399 goto out;
1400 }
d62a17ae 1401 }
eb5d44eb 1402
17c9dcd5
CF		 1403 struct isis_lsp_entry *entry_head =
1404 (struct isis_lsp_entry *)tlvs->lsp_entries.head;
1405
d62a17ae 1406 /* debug isis snp-packets */
e740f9c1 1407 if (IS_DEBUG_SNP_PACKETS) {
d62a17ae 1408 zlog_debug("ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s",
1409 circuit->area->area_tag, level, typechar,
1410 snpa_print(ssnpa), circuit->interface->name);
17c9dcd5
CF		 1411 for (struct isis_lsp_entry *entry = entry_head; entry;
1412 entry = entry->next) {
1413 zlog_debug(
6cde4b45 1414 "ISIS-Snp (%s): %cSNP entry %s, seq 0x%08x, cksum 0x%04hx, lifetime %hus",
17c9dcd5
CF		 1415 circuit->area->area_tag, typechar,
1416 rawlspid_print(entry->id), entry->seqno,
1417 entry->checksum, entry->rem_lifetime);
f390d2c7 1418 }
f390d2c7 1419 }
3f045a08 1420
df0ba689
CF		 1421 bool resync_needed = false;
1422
d62a17ae 1423 /* 7.3.15.2 b) Actions on LSP_ENTRIES reported */
17c9dcd5
CF		 1424 for (struct isis_lsp_entry *entry = entry_head; entry;
1425 entry = entry->next) {
1426 struct isis_lsp *lsp =
4bef0ec4 1427 lsp_search(&circuit->area->lspdb[level - 1], entry->id);
99e5d4af 1428 bool own_lsp = !memcmp(entry->id, circuit->isis->sysid,
eab88f36 1429 ISIS_SYS_ID_LEN);
17c9dcd5
CF		 1430 if (lsp) {
1431 /* 7.3.15.2 b) 1) is this LSP newer */
1432 int cmp = lsp_compare(circuit->area->area_tag, lsp,
1433 entry->seqno, entry->checksum,
1434 entry->rem_lifetime);
1435 /* 7.3.15.2 b) 2) if it equals, clear SRM on p2p */
1436 if (cmp == LSP_EQUAL) {
1437 /* if (circuit->circ_type !=
1438 * CIRCUIT_T_BROADCAST) */
9b39405f 1439 isis_tx_queue_del(circuit->tx_queue, lsp);
17c9dcd5
CF		 1440 }
1441 /* 7.3.15.2 b) 3) if it is older, clear SSN and set SRM
1442 */
1443 else if (cmp == LSP_OLDER) {
1444 ISIS_CLEAR_FLAG(lsp->SSNflags, circuit);
9b39405f
CF		 1445 isis_tx_queue_add(circuit->tx_queue, lsp,
1446 TX_LSP_NORMAL);
17c9dcd5
CF		 1447 }
1448 /* 7.3.15.2 b) 4) if it is newer, set SSN and clear SRM
1449 on p2p */
1450 else {
1451 if (own_lsp) {
af8ac8f9 1452 lsp_inc_seqno(lsp, entry->seqno);
9b39405f
CF		 1453 isis_tx_queue_add(circuit->tx_queue, lsp,
1454 TX_LSP_NORMAL);
17c9dcd5
CF		 1455 } else {
1456 ISIS_SET_FLAG(lsp->SSNflags, circuit);
d62a17ae 1457 /* if (circuit->circ_type !=
1458 * CIRCUIT_T_BROADCAST) */
9b39405f 1459 isis_tx_queue_del(circuit->tx_queue, lsp);
df0ba689 1460 resync_needed = true;
d62a17ae 1461 }
17c9dcd5
CF		 1462 }
1463 } else {
1464 /* 7.3.15.2 b) 5) if it was not found, and all of those
1465 * are not 0,
1466 * insert it and set SSN on it */
1467 if (entry->rem_lifetime && entry->checksum
eab88f36 1468 && entry->seqno
99e5d4af 1469 && memcmp(entry->id, circuit->isis->sysid,
eab88f36 1470 ISIS_SYS_ID_LEN)) {
8f5dbe18
CF		 1471 struct isis_lsp *lsp0 = NULL;
1472
1473 if (LSP_FRAGMENT(entry->id)) {
1474 uint8_t lspid[ISIS_SYS_ID_LEN + 2];
1475
1476 memcpy(lspid, entry->id,
1477 ISIS_SYS_ID_LEN + 1);
1478 LSP_FRAGMENT(lspid) = 0;
1479 lsp0 = lsp_search(
4bef0ec4
DL		 1480 &circuit->area->lspdb[level - 1],
1481 lspid);
8f5dbe18 1482 if (!lsp0) {
98c5bc15 1483 zlog_debug("Got lsp frag in snp, while zero not in database");
8f5dbe18
CF		 1484 continue;
1485 }
1486 }
f7813c7c 1487 lsp = lsp_new(circuit->area, entry->id,
17c9dcd5 1488 entry->rem_lifetime, 0, 0,
8f5dbe18 1489 entry->checksum, lsp0, level);
4bef0ec4
DL		 1490 lsp_insert(&circuit->area->lspdb[level - 1],
1491 lsp);
9b39405f
CF		 1492
1493 lsp_set_all_srmflags(lsp, false);
17c9dcd5 1494 ISIS_SET_FLAG(lsp->SSNflags, circuit);
df0ba689 1495 resync_needed = true;
d62a17ae 1496 }
1497 }
1498 }
eb5d44eb 1499
d62a17ae 1500 /* 7.3.15.2 c) on CSNP set SRM for all in range which were not reported
1501 */
17c9dcd5 1502 if (is_csnp) {
d62a17ae 1503 /*
1504 * Build a list from our own LSP db bounded with
1505 * start_lsp_id and stop_lsp_id
1506 */
17c9dcd5 1507 struct list *lsp_list = list_new();
4bef0ec4
DL		 1508 lsp_build_list_nonzero_ht(&circuit->area->lspdb[level - 1],
1509 start_lsp_id, stop_lsp_id, lsp_list);
d62a17ae 1510
1511 /* Fixme: Find a better solution */
17c9dcd5
CF		 1512 struct listnode *node, *nnode;
1513 struct isis_lsp *lsp;
1514 for (struct isis_lsp_entry *entry = entry_head; entry;
1515 entry = entry->next) {
1516 for (ALL_LIST_ELEMENTS(lsp_list, node, nnode, lsp)) {
af8ac8f9 1517 if (lsp_id_cmp(lsp->hdr.lsp_id, entry->id)
17c9dcd5
CF		 1518 == 0) {
1519 list_delete_node(lsp_list, node);
1520 break;
d62a17ae 1521 }
1522 }
1523 }
17c9dcd5 1524
d62a17ae 1525 /* on remaining LSPs we set SRM (neighbor knew not of) */
9b39405f
CF		 1526 for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) {
1527 isis_tx_queue_add(circuit->tx_queue, lsp, TX_LSP_NORMAL);
df0ba689 1528 resync_needed = true;
9b39405f
CF		 1529 }
1530
d62a17ae 1531 /* lets free it */
6a154c88 1532 list_delete(&lsp_list);
d62a17ae 1533 }
1534
df0ba689 1535 if (fabricd_initial_sync_is_complete(circuit->area) && resync_needed)
9165c5f5 1536 zlog_warn("OpenFabric: Needed to resync LSPDB using CSNP!");
df0ba689 1537
17c9dcd5
CF		 1538 retval = ISIS_OK;
1539out:
1540 isis_free_tlvs(tlvs);
d62a17ae 1541 return retval;
eb5d44eb 1542}
1543
88f9d911
CF		 1544static int pdu_size(uint8_t pdu_type, uint8_t *size)
1545{
1546 switch (pdu_type) {
1547 case L1_LAN_HELLO:
1548 case L2_LAN_HELLO:
1549 *size = ISIS_LANHELLO_HDRLEN;
1550 break;
1551 case P2P_HELLO:
1552 *size = ISIS_P2PHELLO_HDRLEN;
1553 break;
1554 case L1_LINK_STATE:
1555 case L2_LINK_STATE:
1cbd5b37 1556 case FS_LINK_STATE:
88f9d911
CF		 1557 *size = ISIS_LSP_HDR_LEN;
1558 break;
1559 case L1_COMPLETE_SEQ_NUM:
1560 case L2_COMPLETE_SEQ_NUM:
1561 *size = ISIS_CSNP_HDRLEN;
1562 break;
1563 case L1_PARTIAL_SEQ_NUM:
1564 case L2_PARTIAL_SEQ_NUM:
1565 *size = ISIS_PSNP_HDRLEN;
1566 break;
1567 default:
1568 return 1;
1569 }
1570 *size += ISIS_FIXED_HDR_LEN;
1571 return 0;
1572}
1573
eb5d44eb 1574/*
1575 * PDU Dispatcher
1576 */
1577
d7c0a89a 1578int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa)
eb5d44eb 1579{
d62a17ae 1580 int retval = ISIS_OK;
2ab5a2d1
EDP		 1581 size_t pdu_start = stream_get_getp(circuit->rcv_stream);
1582 size_t pdu_end = stream_get_endp(circuit->rcv_stream);
1583 char raw_pdu[pdu_end - pdu_start];
1584
1585 stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start,
1586 pdu_end - pdu_start);
eb5d44eb 1587
88f9d911
CF		 1588 /* Verify that at least the 8 bytes fixed header have been received */
1589 if (stream_get_endp(circuit->rcv_stream) < ISIS_FIXED_HDR_LEN) {
1a7ecb96 1590 flog_err(EC_ISIS_PACKET, "PDU is too short to be IS-IS.");
88f9d911
CF		 1591 return ISIS_ERROR;
1592 }
eb5d44eb 1593
88f9d911
CF		 1594 uint8_t idrp = stream_getc(circuit->rcv_stream);
1595 uint8_t length = stream_getc(circuit->rcv_stream);
1596 uint8_t version1 = stream_getc(circuit->rcv_stream);
1597 uint8_t id_len = stream_getc(circuit->rcv_stream);
1598 uint8_t pdu_type = stream_getc(circuit->rcv_stream)
1599 & 0x1f; /* bits 6-8 are reserved */
1600 uint8_t version2 = stream_getc(circuit->rcv_stream);
2ab5a2d1 1601
88f9d911
CF		 1602 stream_forward_getp(circuit->rcv_stream, 1); /* reserved */
1603 uint8_t max_area_addrs = stream_getc(circuit->rcv_stream);
1604
39bb53d6
CF		 1605 pdu_counter_count(circuit->area->pdu_rx_counters, pdu_type);
1606
88f9d911 1607 if (idrp == ISO9542_ESIS) {
450971aa 1608 flog_err(EC_LIB_DEVELOPMENT,
6cde4b45 1609 "No support for ES-IS packet IDRP=%hhx", idrp);
d62a17ae 1610 return ISIS_ERROR;
1611 }
eb5d44eb 1612
88f9d911 1613 if (idrp != ISO10589_ISIS) {
6cde4b45 1614 flog_err(EC_ISIS_PACKET, "Not an IS-IS packet IDRP=%hhx",
1c50c1c0 1615 idrp);
d62a17ae 1616 return ISIS_ERROR;
1617 }
3f045a08 1618
88f9d911 1619 if (version1 != 1) {
6cde4b45 1620 zlog_warn("Unsupported ISIS version %hhu", version1);
0532bd84
EDP		 1621#ifndef FABRICD
1622 /* send northbound notification */
1623 isis_notif_version_skew(circuit, version1, raw_pdu);
1624#endif /* ifndef FABRICD */
88f9d911
CF		 1625 return ISIS_WARNING;
1626 }
eb5d44eb 1627
88f9d911 1628 if (id_len != 0 && id_len != ISIS_SYS_ID_LEN) {
af4c2728 1629 flog_err(
1a7ecb96 1630 EC_ISIS_PACKET,
6cde4b45 1631 "IDFieldLengthMismatch: ID Length field in a received PDU %hhu, while the parameter for this IS is %u",
88f9d911 1632 id_len, ISIS_SYS_ID_LEN);
c32496ee 1633 circuit->id_len_mismatches++;
e98d7633
EDP		 1634#ifndef FABRICD
1635 /* send northbound notification */
1636 isis_notif_id_len_mismatch(circuit, id_len, raw_pdu);
1637#endif /* ifndef FABRICD */
d62a17ae 1638 return ISIS_ERROR;
1639 }
eb5d44eb 1640
88f9d911
CF		 1641 uint8_t expected_length;
1642 if (pdu_size(pdu_type, &expected_length)) {
6cde4b45 1643 zlog_warn("Unsupported ISIS PDU %hhu", pdu_type);
d62a17ae 1644 return ISIS_WARNING;
1645 }
88f9d911
CF		 1646
1647 if (length != expected_length) {
1a7ecb96 1648 flog_err(EC_ISIS_PACKET,
6cde4b45 1649 "Expected fixed header length = %hhu but got %hhu",
1c50c1c0 1650 expected_length, length);
88f9d911
CF		 1651 return ISIS_ERROR;
1652 }
1653
1654 if (stream_get_endp(circuit->rcv_stream) < length) {
af4c2728 1655 flog_err(
1a7ecb96 1656 EC_ISIS_PACKET,
88f9d911 1657 "PDU is too short to contain fixed header of given PDU type.");
d62a17ae 1658 return ISIS_ERROR;
1659 }
eb5d44eb 1660
88f9d911 1661 if (version2 != 1) {
6cde4b45 1662 zlog_warn("Unsupported ISIS PDU version %hhu", version2);
0532bd84
EDP		 1663#ifndef FABRICD
1664 /* send northbound notification */
1665 isis_notif_version_skew(circuit, version2, raw_pdu);
1666#endif /* ifndef FABRICD */
d62a17ae 1667 return ISIS_WARNING;
1668 }
3f045a08 1669
d62a17ae 1670 if (circuit->is_passive) {
1671 zlog_warn("Received ISIS PDU on passive circuit %s",
1672 circuit->interface->name);
1673 return ISIS_WARNING;
1674 }
3f045a08 1675
d62a17ae 1676 /* either 3 or 0 */
eab88f36
K		 1677 if (pdu_type != FS_LINK_STATE /* FS PDU doesn't contain max area addr
1678 field */
1cbd5b37 1679 && max_area_addrs != 0
99e5d4af 1680 && max_area_addrs != circuit->isis->max_area_addrs) {
af4c2728 1681 flog_err(
1a7ecb96 1682 EC_ISIS_PACKET,
6cde4b45 1683 "maximumAreaAddressesMismatch: maximumAreaAdresses in a received PDU %hhu while the parameter for this IS is %u",
99e5d4af 1684 max_area_addrs, circuit->isis->max_area_addrs);
c32496ee 1685 circuit->max_area_addr_mismatches++;
2ab5a2d1
EDP		 1686#ifndef FABRICD
1687 /* send northbound notification */
1688 isis_notif_max_area_addr_mismatch(circuit, max_area_addrs,
1689 raw_pdu);
1690#endif /* ifndef FABRICD */
d62a17ae 1691 return ISIS_ERROR;
1692 }
eb5d44eb 1693
88f9d911 1694 switch (pdu_type) {
d62a17ae 1695 case L1_LAN_HELLO:
d62a17ae 1696 case L2_LAN_HELLO:
d62a17ae 1697 case P2P_HELLO:
a2d41bb0
CF		 1698 if (fabricd && pdu_type != P2P_HELLO)
1699 return ISIS_ERROR;
0c1bd758 1700 retval = process_hello(pdu_type, circuit, ssnpa);
d62a17ae 1701 break;
1702 case L1_LINK_STATE:
d62a17ae 1703 case L2_LINK_STATE:
1cbd5b37 1704 case FS_LINK_STATE:
a2d41bb0
CF		 1705 if (fabricd
1706 && pdu_type != L2_LINK_STATE
1707 && pdu_type != FS_LINK_STATE)
1708 return ISIS_ERROR;
9b39405f 1709 retval = process_lsp(pdu_type, circuit, ssnpa, max_area_addrs);
d62a17ae 1710 break;
1711 case L1_COMPLETE_SEQ_NUM:
d62a17ae 1712 case L2_COMPLETE_SEQ_NUM:
d62a17ae 1713 case L1_PARTIAL_SEQ_NUM:
d62a17ae 1714 case L2_PARTIAL_SEQ_NUM:
17c9dcd5 1715 retval = process_snp(pdu_type, circuit, ssnpa);
d62a17ae 1716 break;
1717 default:
1718 return ISIS_ERROR;
1719 }
eb5d44eb 1720
d62a17ae 1721 return retval;
eb5d44eb 1722}
1723
d62a17ae 1724int isis_receive(struct thread *thread)
eb5d44eb 1725{
d62a17ae 1726 struct isis_circuit *circuit;
d7c0a89a 1727 uint8_t ssnpa[ETH_ALEN];
d62a17ae 1728 int retval;
eb5d44eb 1729
d62a17ae 1730 /*
1731 * Get the circuit
1732 */
1733 circuit = THREAD_ARG(thread);
1734 assert(circuit);
eb5d44eb 1735
d62a17ae 1736 circuit->t_read = NULL;
eb5d44eb 1737
d62a17ae 1738 isis_circuit_stream(circuit, &circuit->rcv_stream);
eb5d44eb 1739
d62a17ae 1740 retval = circuit->rx(circuit, ssnpa);
eb5d44eb 1741
b9347997 1742#if ISIS_METHOD != ISIS_METHOD_BPF
d62a17ae 1743 if (retval == ISIS_OK)
1744 retval = isis_handle_pdu(circuit, ssnpa);
b9347997 1745#endif //ISIS_METHOD != ISIS_METHOD_BPF
eb5d44eb 1746
d62a17ae 1747 /*
1748 * prepare for next packet.
1749 */
1750 if (!circuit->is_passive)
1751 isis_circuit_prepare(circuit);
eb5d44eb 1752
d62a17ae 1753 return retval;
eb5d44eb 1754}
1755
eb5d44eb 1756/*
d62a17ae 1757 * SEND SIDE
eb5d44eb 1758 */
88f9d911 1759void fill_fixed_hdr(uint8_t pdu_type, struct stream *stream)
eb5d44eb 1760{
88f9d911
CF		 1761 uint8_t length;
1762
1763 if (pdu_size(pdu_type, &length))
1764 assert(!"Unknown PDU Type");
1765
1766 stream_putc(stream, ISO10589_ISIS); /* IDRP */
1767 stream_putc(stream, length); /* Length of fixed header */
1768 stream_putc(stream, 1); /* Version/Protocol ID Extension 1 */
1769 stream_putc(stream, 0); /* ID Length, 0 => 6 */
1770 stream_putc(stream, pdu_type);
1771 stream_putc(stream, 1); /* Subversion */
1772 stream_putc(stream, 0); /* Reserved */
1773 stream_putc(stream, 0); /* Max Area Addresses 0 => 3 */
eb5d44eb 1774}
1775
39bb53d6 1776static uint8_t hello_pdu_type(struct isis_circuit *circuit, int level)
eb5d44eb 1777{
d62a17ae 1778 if (circuit->circ_type == CIRCUIT_T_BROADCAST)
39bb53d6 1779 return (level == IS_LEVEL_1) ? L1_LAN_HELLO : L2_LAN_HELLO;
d62a17ae 1780 else
39bb53d6
CF		 1781 return P2P_HELLO;
1782}
1783
1784static void put_hello_hdr(struct isis_circuit *circuit, int level,
1785 size_t *len_pointer)
1786{
1787 uint8_t pdu_type = hello_pdu_type(circuit, level);
88f9d911 1788
0c1bd758 1789 isis_circuit_stream(circuit, &circuit->snd_stream);
88f9d911 1790 fill_fixed_hdr(pdu_type, circuit->snd_stream);
d62a17ae 1791
0c1bd758 1792 stream_putc(circuit->snd_stream, circuit->is_type);
99e5d4af 1793 stream_put(circuit->snd_stream, circuit->isis->sysid, ISIS_SYS_ID_LEN);
eb5d44eb 1794
0c1bd758
CF		 1795 uint32_t holdtime = circuit->hello_multiplier[level - 1]
1796 * circuit->hello_interval[level - 1];
d62a17ae 1797
0c1bd758
CF		 1798 if (holdtime > 0xffff)
1799 holdtime = 0xffff;
d62a17ae 1800
0c1bd758
CF		 1801 stream_putw(circuit->snd_stream, holdtime);
1802 *len_pointer = stream_get_endp(circuit->snd_stream);
1803 stream_putw(circuit->snd_stream, 0); /* length is filled in later */
d62a17ae 1804
0c1bd758 1805 if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
d7c0a89a
QY		 1806 uint8_t *desig_is = (level == IS_LEVEL_1)
1807 ? circuit->u.bc.l1_desig_is
1808 : circuit->u.bc.l2_desig_is;
0c1bd758
CF		 1809 stream_putc(circuit->snd_stream, circuit->priority[level - 1]);
1810 stream_put(circuit->snd_stream, desig_is, ISIS_SYS_ID_LEN + 1);
1811 } else {
1812 stream_putc(circuit->snd_stream, circuit->circuit_id);
d62a17ae 1813 }
0c1bd758 1814}
eb5d44eb 1815
0c1bd758
CF		 1816int send_hello(struct isis_circuit *circuit, int level)
1817{
1818 size_t len_pointer;
1819 int retval;
1820
1821 if (circuit->is_passive)
1822 return ISIS_OK;
1823
1824 if (circuit->interface->mtu == 0) {
1825 zlog_warn("circuit has zero MTU");
d62a17ae 1826 return ISIS_WARNING;
0c1bd758
CF		 1827 }
1828
1829 put_hello_hdr(circuit, level, &len_pointer);
1830
1831 struct isis_tlvs *tlvs = isis_alloc_tlvs();
1832
1833 isis_tlvs_add_auth(tlvs, &circuit->passwd);
1834
a3acf37d
DS		 1835 if (!listcount(circuit->area->area_addrs)) {
1836 isis_free_tlvs(tlvs);
d62a17ae 1837 return ISIS_WARNING;
a3acf37d
DS		 1838 }
1839
0c1bd758 1840 isis_tlvs_add_area_addresses(tlvs, circuit->area->area_addrs);
d62a17ae 1841
42fe2621 1842 if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
0c1bd758
CF		 1843 isis_tlvs_add_lan_neighbors(
1844 tlvs, circuit->u.bc.lan_neighs[level - 1]);
58e5d748
CF		 1845 } else if (circuit->circ_type == CIRCUIT_T_P2P
1846 && !circuit->disable_threeway_adj) {
42fe2621
CF		 1847 uint32_t ext_circuit_id = circuit->idx;
1848 if (circuit->u.p2p.neighbor) {
8e6fb83b
CF		 1849 uint8_t threeway_state;
1850
1851 if (fabricd_initial_sync_is_in_progress(circuit->area)
1852 && fabricd_initial_sync_circuit(circuit->area) != circuit)
1853 threeway_state = ISIS_THREEWAY_DOWN;
1854 else
1855 threeway_state = circuit->u.p2p.neighbor->threeway_state;
42fe2621 1856 isis_tlvs_add_threeway_adj(tlvs,
8e6fb83b 1857 threeway_state,
42fe2621
CF		 1858 ext_circuit_id,
1859 circuit->u.p2p.neighbor->sysid,
1860 circuit->u.p2p.neighbor->ext_circuit_id);
1861 } else {
1862 isis_tlvs_add_threeway_adj(tlvs,
1863 ISIS_THREEWAY_DOWN,
1864 ext_circuit_id,
1865 NULL, 0);
1866 }
1867 }
0c1bd758
CF		 1868
1869 isis_tlvs_set_protocols_supported(tlvs, &circuit->nlpids);
d62a17ae 1870
1871 /*
1872 * MT Supported TLV
1873 *
1874 * TLV gets included if no topology is enabled on the interface,
1875 * if one topology other than #0 is enabled, or if multiple topologies
1876 * are enabled.
1877 */
1878 struct isis_circuit_mt_setting **mt_settings;
1879 unsigned int mt_count;
1880
1881 mt_settings = circuit_mt_settings(circuit, &mt_count);
0c1bd758
CF		 1882 if (mt_count == 0 && area_is_mt(circuit->area)) {
1883 tlvs->mt_router_info_empty = true;
1884 } else if ((mt_count == 1
1885 && mt_settings[0]->mtid != ISIS_MT_IPV4_UNICAST)
1886 || (mt_count > 1)) {
1887 for (unsigned int i = 0; i < mt_count; i++)
1888 isis_tlvs_add_mt_router_info(tlvs, mt_settings[i]->mtid,
1889 false, false);
d62a17ae 1890 }
eb5d44eb 1891
41415888
CF		 1892 if (circuit->ip_router) {
1893 struct list *circuit_ip_addrs = fabricd_ip_addrs(circuit);
1894
1895 if (circuit_ip_addrs)
1896 isis_tlvs_add_ipv4_addresses(tlvs, circuit_ip_addrs);
1897 }
d62a17ae 1898
0c1bd758
CF		 1899 if (circuit->ipv6_router && circuit->ipv6_link)
1900 isis_tlvs_add_ipv6_addresses(tlvs, circuit->ipv6_link);
d62a17ae 1901
0c1bd758 1902 if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer,
af8ac8f9 1903 circuit->pad_hellos, false)) {
0c1bd758
CF		 1904 isis_free_tlvs(tlvs);
1905 return ISIS_WARNING; /* XXX: Maybe Log TLV structure? */
f390d2c7 1906 }
d62a17ae 1907
e740f9c1 1908 if (IS_DEBUG_ADJ_PACKETS) {
d62a17ae 1909 if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
1910 zlog_debug(
1911 "ISIS-Adj (%s): Sending L%d LAN IIH on %s, length %zd",
1912 circuit->area->area_tag, level,
0c1bd758
CF		 1913 circuit->interface->name,
1914 stream_get_endp(circuit->snd_stream));
d62a17ae 1915 } else {
1916 zlog_debug(
1917 "ISIS-Adj (%s): Sending P2P IIH on %s, length %zd",
1918 circuit->area->area_tag,
0c1bd758
CF		 1919 circuit->interface->name,
1920 stream_get_endp(circuit->snd_stream));
d62a17ae 1921 }
e740f9c1 1922 if (IS_DEBUG_PACKET_DUMP)
d62a17ae 1923 zlog_dump_data(STREAM_DATA(circuit->snd_stream),
1924 stream_get_endp(circuit->snd_stream));
f390d2c7 1925 }
eb5d44eb 1926
0c1bd758
CF		 1927 isis_free_tlvs(tlvs);
1928
89cdc4df
RM		 1929 pdu_counter_count(circuit->area->pdu_tx_counters,
1930 hello_pdu_type(circuit, level));
d62a17ae 1931 retval = circuit->tx(circuit, level);
1932 if (retval != ISIS_OK)
1a7ecb96 1933 flog_err(EC_ISIS_PACKET,
1c50c1c0
QY		 1934 "ISIS-Adj (%s): Send L%d IIH on %s failed",
1935 circuit->area->area_tag, level,
1936 circuit->interface->name);
eb5d44eb 1937
d62a17ae 1938 return retval;
eb5d44eb 1939}
1940
a0a707ee 1941static int send_hello_cb(struct thread *thread)
eb5d44eb 1942{
7c4f7aab 1943 struct isis_circuit_arg *arg = THREAD_ARG(thread);
7c4f7aab 1944 assert(arg);
89cdc4df 1945
7c4f7aab
CF		 1946 struct isis_circuit *circuit = arg->circuit;
1947 int level = arg->level;
d62a17ae 1948
d62a17ae 1949 assert(circuit);
ddfdbd32 1950
7c4f7aab
CF		 1951 if (circuit->circ_type == CIRCUIT_T_P2P) {
1952 circuit->u.p2p.t_send_p2p_hello = NULL;
7c4f7aab 1953 send_hello(circuit, 1);
a0a707ee
CF		 1954 send_hello_sched(circuit, ISIS_LEVEL1,
1955 1000 * circuit->hello_interval[1]);
7c4f7aab 1956 return ISIS_OK;
d62a17ae 1957 }
ddfdbd32 1958
7c4f7aab
CF		 1959 if (circuit->circ_type != CIRCUIT_T_BROADCAST) {
1960 zlog_warn("ISIS-Hello (%s): Trying to send hello on unknown circuit type %d",
1961 circuit->area->area_tag, circuit->circ_type);
1962 return ISIS_WARNING;
1963 }
eb5d44eb 1964
7c4f7aab
CF		 1965 circuit->u.bc.t_send_lan_hello[level - 1] = NULL;
1966 if (!(circuit->is_type & level)) {
1967 zlog_warn("ISIS-Hello (%s): Trying to send L%d IIH in L%d-only circuit",
1968 circuit->area->area_tag, level, 3 - level);
1969 return ISIS_WARNING;
1970 }
eb5d44eb 1971
7c4f7aab
CF		 1972 if (circuit->u.bc.run_dr_elect[level - 1])
1973 isis_dr_elect(circuit, level);
eb5d44eb 1974
7c4f7aab 1975 int rv = send_hello(circuit, level);
eb5d44eb 1976
d62a17ae 1977 /* set next timer thread */
a0a707ee 1978 send_hello_sched(circuit, level, 1000 * circuit->hello_interval[level - 1]);
7c4f7aab 1979 return rv;
eb5d44eb 1980}
1981
a0a707ee
CF		 1982static void _send_hello_sched(struct isis_circuit *circuit,
1983 struct thread **threadp,
1984 int level, long delay)
1985{
1986 if (*threadp) {
1987 if (thread_timer_remain_msec(*threadp) < (unsigned long)delay)
1988 return;
1989
b3d6bc6e 1990 thread_cancel(threadp);
a0a707ee
CF		 1991 }
1992
1993 thread_add_timer_msec(master, send_hello_cb,
1994 &circuit->level_arg[level - 1],
1995 isis_jitter(delay, IIH_JITTER),
1996 threadp);
1997}
1998
1999void send_hello_sched(struct isis_circuit *circuit, int level, long delay)
2000{
2001 if (circuit->circ_type == CIRCUIT_T_P2P) {
2002 _send_hello_sched(circuit, &circuit->u.p2p.t_send_p2p_hello,
2003 ISIS_LEVEL1, delay);
2004 return;
2005 }
2006
2007 if (circuit->circ_type != CIRCUIT_T_BROADCAST) {
2008 zlog_warn("%s: encountered unknown circuit type %d on %s",
2009 __func__, circuit->circ_type,
2010 circuit->interface->name);
2011 return;
2012 }
2013
2014 for (int loop_level = ISIS_LEVEL1; loop_level <= ISIS_LEVEL2; loop_level++) {
2015 if (!(loop_level & level))
2016 continue;
2017
2018 _send_hello_sched(
2019 circuit,
2020 &circuit->u.bc.t_send_lan_hello[loop_level - 1],
2021 loop_level,
2022 delay
2023 );
2024 }
2025}
2026
2027
3f045a08
JB		 2028/*
2029 * Count the maximum number of lsps that can be accomodated by a given size.
2030 */
af8ac8f9 2031#define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN)
d62a17ae 2032static uint16_t get_max_lsp_count(uint16_t size)
3f045a08 2033{
d62a17ae 2034 uint16_t tlv_count;
2035 uint16_t lsp_count;
2036 uint16_t remaining_size;
3f045a08 2037
d62a17ae 2038 /* First count the full size TLVs */
2039 tlv_count = size / MAX_LSP_ENTRIES_TLV_SIZE;
2040 lsp_count = tlv_count * (MAX_LSP_ENTRIES_TLV_SIZE / LSP_ENTRIES_LEN);
3f045a08 2041
d62a17ae 2042 /* The last TLV, if any */
2043 remaining_size = size % MAX_LSP_ENTRIES_TLV_SIZE;
2044 if (remaining_size - 2 >= LSP_ENTRIES_LEN)
2045 lsp_count += (remaining_size - 2) / LSP_ENTRIES_LEN;
3f045a08 2046
d62a17ae 2047 return lsp_count;
3f045a08
JB		 2048}
2049
17c9dcd5 2050int send_csnp(struct isis_circuit *circuit, int level)
3f045a08 2051{
4bef0ec4 2052 if (lspdb_count(&circuit->area->lspdb[level - 1]) == 0)
17c9dcd5 2053 return ISIS_OK;
d62a17ae 2054
39bb53d6
CF		 2055 uint8_t pdu_type = (level == ISIS_LEVEL1) ? L1_COMPLETE_SEQ_NUM
2056 : L2_COMPLETE_SEQ_NUM;
2057
17c9dcd5 2058 isis_circuit_stream(circuit, &circuit->snd_stream);
39bb53d6 2059 fill_fixed_hdr(pdu_type, circuit->snd_stream);
3f045a08 2060
17c9dcd5 2061 size_t len_pointer = stream_get_endp(circuit->snd_stream);
eab88f36 2062
17c9dcd5 2063 stream_putw(circuit->snd_stream, 0);
99e5d4af 2064 stream_put(circuit->snd_stream, circuit->isis->sysid, ISIS_SYS_ID_LEN);
17c9dcd5
CF		 2065 /* with zero circuit id - ref 9.10, 9.11 */
2066 stream_putc(circuit->snd_stream, 0);
3f045a08 2067
17c9dcd5
CF		 2068 size_t start_pointer = stream_get_endp(circuit->snd_stream);
2069 stream_put(circuit->snd_stream, 0, ISIS_SYS_ID_LEN + 2);
2070 size_t end_pointer = stream_get_endp(circuit->snd_stream);
2071 stream_put(circuit->snd_stream, 0, ISIS_SYS_ID_LEN + 2);
d62a17ae 2072
17c9dcd5
CF		 2073 struct isis_passwd *passwd = (level == ISIS_LEVEL1)
2074 ? &circuit->area->area_passwd
2075 : &circuit->area->domain_passwd;
d62a17ae 2076
17c9dcd5 2077 struct isis_tlvs *tlvs = isis_alloc_tlvs();
3f045a08 2078
17c9dcd5
CF		 2079 if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND))
2080 isis_tlvs_add_auth(tlvs, passwd);
eb5d44eb 2081
17c9dcd5 2082 size_t tlv_start = stream_get_endp(circuit->snd_stream);
af8ac8f9
CF		 2083 if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, false,
2084 false)) {
17c9dcd5
CF		 2085 isis_free_tlvs(tlvs);
2086 return ISIS_WARNING;
2087 }
2088 isis_free_tlvs(tlvs);
d62a17ae 2089
17c9dcd5
CF		 2090 uint16_t num_lsps =
2091 get_max_lsp_count(STREAM_WRITEABLE(circuit->snd_stream));
d62a17ae 2092
17c9dcd5 2093 uint8_t start[ISIS_SYS_ID_LEN + 2];
d62a17ae 2094 memset(start, 0x00, ISIS_SYS_ID_LEN + 2);
17c9dcd5 2095 uint8_t stop[ISIS_SYS_ID_LEN + 2];
d62a17ae 2096 memset(stop, 0xff, ISIS_SYS_ID_LEN + 2);
2097
17c9dcd5 2098 bool loop = true;
d62a17ae 2099 while (loop) {
17c9dcd5
CF		 2100 tlvs = isis_alloc_tlvs();
2101 if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND))
2102 isis_tlvs_add_auth(tlvs, passwd);
2103
2104 struct isis_lsp *last_lsp;
2105 isis_tlvs_add_csnp_entries(tlvs, start, stop, num_lsps,
4bef0ec4 2106 &circuit->area->lspdb[level - 1],
17c9dcd5 2107 &last_lsp);
d62a17ae 2108 /*
2109 * Update the stop lsp_id before encoding this CSNP.
2110 */
17c9dcd5 2111 if (tlvs->lsp_entries.count < num_lsps) {
d62a17ae 2112 memset(stop, 0xff, ISIS_SYS_ID_LEN + 2);
2113 } else {
af8ac8f9 2114 memcpy(stop, last_lsp->hdr.lsp_id, sizeof(stop));
d62a17ae 2115 }
3f045a08 2116
17c9dcd5
CF		 2117 memcpy(STREAM_DATA(circuit->snd_stream) + start_pointer, start,
2118 ISIS_SYS_ID_LEN + 2);
2119 memcpy(STREAM_DATA(circuit->snd_stream) + end_pointer, stop,
2120 ISIS_SYS_ID_LEN + 2);
2121 stream_set_endp(circuit->snd_stream, tlv_start);
2122 if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer,
af8ac8f9 2123 false, false)) {
17c9dcd5
CF		 2124 isis_free_tlvs(tlvs);
2125 return ISIS_WARNING;
d62a17ae 2126 }
eb5d44eb 2127
e740f9c1 2128 if (IS_DEBUG_SNP_PACKETS) {
d62a17ae 2129 zlog_debug(
2130 "ISIS-Snp (%s): Sending L%d CSNP on %s, length %zd",
2131 circuit->area->area_tag, level,
2132 circuit->interface->name,
2133 stream_get_endp(circuit->snd_stream));
17c9dcd5
CF		 2134 log_multiline(LOG_DEBUG, " ", "%s",
2135 isis_format_tlvs(tlvs));
e740f9c1 2136 if (IS_DEBUG_PACKET_DUMP)
d62a17ae 2137 zlog_dump_data(
2138 STREAM_DATA(circuit->snd_stream),
2139 stream_get_endp(circuit->snd_stream));
2140 }
eb5d44eb 2141
39bb53d6 2142 pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type);
17c9dcd5 2143 int retval = circuit->tx(circuit, level);
d62a17ae 2144 if (retval != ISIS_OK) {
1a7ecb96 2145 flog_err(EC_ISIS_PACKET,
1c50c1c0
QY		 2146 "ISIS-Snp (%s): Send L%d CSNP on %s failed",
2147 circuit->area->area_tag, level,
2148 circuit->interface->name);
17c9dcd5 2149 isis_free_tlvs(tlvs);
d62a17ae 2150 return retval;
2151 }
3f045a08 2152
d62a17ae 2153 /*
2154 * Start lsp_id of the next CSNP should be one plus the
2155 * stop lsp_id in this current CSNP.
2156 */
2157 memcpy(start, stop, ISIS_SYS_ID_LEN + 2);
d8729f8c 2158 loop = false;
17c9dcd5 2159 for (int i = ISIS_SYS_ID_LEN + 1; i >= 0; --i) {
d7c0a89a 2160 if (start[i] < (uint8_t)0xff) {
d62a17ae 2161 start[i] += 1;
d8729f8c 2162 loop = true;
d62a17ae 2163 break;
2164 }
2165 }
2166 memset(stop, 0xff, ISIS_SYS_ID_LEN + 2);
17c9dcd5 2167 isis_free_tlvs(tlvs);
d62a17ae 2168 }
3f045a08 2169
17c9dcd5 2170 return ISIS_OK;
eb5d44eb 2171}
2172
d62a17ae 2173int send_l1_csnp(struct thread *thread)
eb5d44eb 2174{
d62a17ae 2175 struct isis_circuit *circuit;
eb5d44eb 2176
d62a17ae 2177 circuit = THREAD_ARG(thread);
2178 assert(circuit);
eb5d44eb 2179
d62a17ae 2180 circuit->t_send_csnp[0] = NULL;
eb5d44eb 2181
8e6fb83b
CF		 2182 if ((circuit->circ_type == CIRCUIT_T_BROADCAST
2183 && circuit->u.bc.is_dr[0])
2184 || circuit->circ_type == CIRCUIT_T_P2P) {
d62a17ae 2185 send_csnp(circuit, 1);
2186 }
2187 /* set next timer thread */
2188 thread_add_timer(master, send_l1_csnp, circuit,
2189 isis_jitter(circuit->csnp_interval[0], CSNP_JITTER),
2190 &circuit->t_send_csnp[0]);
eb5d44eb 2191
9f2d0354 2192 return ISIS_OK;
eb5d44eb 2193}
2194
d62a17ae 2195int send_l2_csnp(struct thread *thread)
eb5d44eb 2196{
d62a17ae 2197 struct isis_circuit *circuit;
eb5d44eb 2198
d62a17ae 2199 circuit = THREAD_ARG(thread);
2200 assert(circuit);
eb5d44eb 2201
d62a17ae 2202 circuit->t_send_csnp[1] = NULL;
eb5d44eb 2203
8e6fb83b
CF		 2204 if ((circuit->circ_type == CIRCUIT_T_BROADCAST
2205 && circuit->u.bc.is_dr[1])
2206 || circuit->circ_type == CIRCUIT_T_P2P) {
d62a17ae 2207 send_csnp(circuit, 2);
2208 }
2209 /* set next timer thread */
2210 thread_add_timer(master, send_l2_csnp, circuit,
2211 isis_jitter(circuit->csnp_interval[1], CSNP_JITTER),
2212 &circuit->t_send_csnp[1]);
d70f99e1 2213
9f2d0354 2214 return ISIS_OK;
eb5d44eb 2215}
2216
eb5d44eb 2217/*
2218 * 7.3.15.4 action on expiration of partial SNP interval
2219 * level 1
2220 */
d62a17ae 2221static int send_psnp(int level, struct isis_circuit *circuit)
eb5d44eb 2222{
d62a17ae 2223 if (circuit->circ_type == CIRCUIT_T_BROADCAST
2224 && circuit->u.bc.is_dr[level - 1])
2225 return ISIS_OK;
eb5d44eb 2226
4bef0ec4 2227 if (lspdb_count(&circuit->area->lspdb[level - 1]) == 0)
d62a17ae 2228 return ISIS_OK;
f390d2c7 2229
d62a17ae 2230 if (!circuit->snd_stream)
2231 return ISIS_ERROR;
e38e0df0 2232
39bb53d6
CF		 2233 uint8_t pdu_type = (level == ISIS_LEVEL1) ? L1_PARTIAL_SEQ_NUM
2234 : L2_PARTIAL_SEQ_NUM;
2235
17c9dcd5 2236 isis_circuit_stream(circuit, &circuit->snd_stream);
39bb53d6 2237 fill_fixed_hdr(pdu_type, circuit->snd_stream);
17c9dcd5
CF		 2238
2239 size_t len_pointer = stream_get_endp(circuit->snd_stream);
2240 stream_putw(circuit->snd_stream, 0); /* length is filled in later */
99e5d4af 2241 stream_put(circuit->snd_stream, circuit->isis->sysid, ISIS_SYS_ID_LEN);
17c9dcd5
CF		 2242 stream_putc(circuit->snd_stream, circuit->idx);
2243
2244 struct isis_passwd *passwd = (level == ISIS_LEVEL1)
2245 ? &circuit->area->area_passwd
2246 : &circuit->area->domain_passwd;
2247
2248 struct isis_tlvs *tlvs = isis_alloc_tlvs();
2249
2250 if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND))
2251 isis_tlvs_add_auth(tlvs, passwd);
2252
2253 size_t tlv_start = stream_get_endp(circuit->snd_stream);
af8ac8f9
CF		 2254 if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, false,
2255 false)) {
17c9dcd5
CF		 2256 isis_free_tlvs(tlvs);
2257 return ISIS_WARNING;
2258 }
2259 isis_free_tlvs(tlvs);
2260
2261 uint16_t num_lsps =
2262 get_max_lsp_count(STREAM_WRITEABLE(circuit->snd_stream));
f390d2c7 2263
d62a17ae 2264 while (1) {
4bef0ec4
DL		 2265 struct isis_lsp *lsp;
2266
17c9dcd5
CF		 2267 tlvs = isis_alloc_tlvs();
2268 if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND))
2269 isis_tlvs_add_auth(tlvs, passwd);
2270
81fddbe7 2271 frr_each (lspdb, &circuit->area->lspdb[level - 1], lsp) {
17c9dcd5
CF		 2272 if (ISIS_CHECK_FLAG(lsp->SSNflags, circuit))
2273 isis_tlvs_add_lsp_entry(tlvs, lsp);
eb5d44eb 2274
17c9dcd5
CF		 2275 if (tlvs->lsp_entries.count == num_lsps)
2276 break;
2277 }
2278
2279 if (!tlvs->lsp_entries.count) {
2280 isis_free_tlvs(tlvs);
d62a17ae 2281 return ISIS_OK;
2282 }
2283
17c9dcd5
CF		 2284 stream_set_endp(circuit->snd_stream, tlv_start);
2285 if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer,
af8ac8f9 2286 false, false)) {
17c9dcd5
CF		 2287 isis_free_tlvs(tlvs);
2288 return ISIS_WARNING;
d62a17ae 2289 }
2290
e740f9c1 2291 if (IS_DEBUG_SNP_PACKETS) {
d62a17ae 2292 zlog_debug(
2293 "ISIS-Snp (%s): Sending L%d PSNP on %s, length %zd",
2294 circuit->area->area_tag, level,
2295 circuit->interface->name,
2296 stream_get_endp(circuit->snd_stream));
17c9dcd5
CF		 2297 log_multiline(LOG_DEBUG, " ", "%s",
2298 isis_format_tlvs(tlvs));
e740f9c1 2299 if (IS_DEBUG_PACKET_DUMP)
d62a17ae 2300 zlog_dump_data(
2301 STREAM_DATA(circuit->snd_stream),
2302 stream_get_endp(circuit->snd_stream));
2303 }
2304
39bb53d6 2305 pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type);
17c9dcd5 2306 int retval = circuit->tx(circuit, level);
d62a17ae 2307 if (retval != ISIS_OK) {
1a7ecb96 2308 flog_err(EC_ISIS_PACKET,
1c50c1c0
QY		 2309 "ISIS-Snp (%s): Send L%d PSNP on %s failed",
2310 circuit->area->area_tag, level,
2311 circuit->interface->name);
17c9dcd5 2312 isis_free_tlvs(tlvs);
d62a17ae 2313 return retval;
2314 }
2315
2316 /*
2317 * sending succeeded, we can clear SSN flags of this circuit
2318 * for the LSPs in list
2319 */
17c9dcd5
CF		 2320 struct isis_lsp_entry *entry_head;
2321 entry_head = (struct isis_lsp_entry *)tlvs->lsp_entries.head;
2322 for (struct isis_lsp_entry *entry = entry_head; entry;
2323 entry = entry->next)
2324 ISIS_CLEAR_FLAG(entry->lsp->SSNflags, circuit);
2325 isis_free_tlvs(tlvs);
d62a17ae 2326 }
2327
17c9dcd5 2328 return ISIS_OK;
eb5d44eb 2329}
2330
d62a17ae 2331int send_l1_psnp(struct thread *thread)
eb5d44eb 2332{
2333
d62a17ae 2334 struct isis_circuit *circuit;
eb5d44eb 2335
d62a17ae 2336 circuit = THREAD_ARG(thread);
2337 assert(circuit);
eb5d44eb 2338
d62a17ae 2339 circuit->t_send_psnp[0] = NULL;
eb5d44eb 2340
d62a17ae 2341 send_psnp(1, circuit);
2342 /* set next timer thread */
2343 thread_add_timer(master, send_l1_psnp, circuit,
2344 isis_jitter(circuit->psnp_interval[0], PSNP_JITTER),
2345 &circuit->t_send_psnp[0]);
eb5d44eb 2346
9f2d0354 2347 return ISIS_OK;
eb5d44eb 2348}
2349
2350/*
2351 * 7.3.15.4 action on expiration of partial SNP interval
2352 * level 2
2353 */
d62a17ae 2354int send_l2_psnp(struct thread *thread)
eb5d44eb 2355{
d62a17ae 2356 struct isis_circuit *circuit;
eb5d44eb 2357
d62a17ae 2358 circuit = THREAD_ARG(thread);
2359 assert(circuit);
eb5d44eb 2360
d62a17ae 2361 circuit->t_send_psnp[1] = NULL;
eb5d44eb 2362
d62a17ae 2363 send_psnp(2, circuit);
eb5d44eb 2364
d62a17ae 2365 /* set next timer thread */
2366 thread_add_timer(master, send_l2_psnp, circuit,
2367 isis_jitter(circuit->psnp_interval[1], PSNP_JITTER),
2368 &circuit->t_send_psnp[1]);
eb5d44eb 2369
9f2d0354 2370 return ISIS_OK;
eb5d44eb 2371}
2372
eb5d44eb 2373/*
2374 * ISO 10589 - 7.3.14.3
2375 */
161fa356
CF		 2376void send_lsp(struct isis_circuit *circuit, struct isis_lsp *lsp,
2377 enum isis_tx_type tx_type)
eb5d44eb 2378{
d62a17ae 2379 int clear_srm = 1;
2380 int retval = ISIS_OK;
2381
d62a17ae 2382 if (circuit->state != C_STATE_UP || circuit->is_passive == 1)
2383 goto out;
2384
2385 /*
2386 * Do not send if levels do not match
2387 */
2388 if (!(lsp->level & circuit->is_type))
2389 goto out;
2390
2391 /*
2392 * Do not send if we do not have adjacencies in state up on the circuit
2393 */
2394 if (circuit->upadjcount[lsp->level - 1] == 0)
2395 goto out;
2396
2397 /* stream_copy will assert and stop program execution if LSP is larger
2398 * than
2399 * the circuit's MTU. So handle and log this case here. */
2400 if (stream_get_endp(lsp->pdu) > stream_get_size(circuit->snd_stream)) {
af4c2728 2401 flog_err(
1a7ecb96 2402 EC_ISIS_PACKET,
6cde4b45 2403 "ISIS-Upd (%s): Can't send L%d LSP %s, seq 0x%08x, cksum 0x%04hx, lifetime %hus on %s. LSP Size is %zu while interface stream size is %zu.",
d62a17ae 2404 circuit->area->area_tag, lsp->level,
af8ac8f9
CF		 2405 rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.seqno,
2406 lsp->hdr.checksum, lsp->hdr.rem_lifetime,
d62a17ae 2407 circuit->interface->name, stream_get_endp(lsp->pdu),
2408 stream_get_size(circuit->snd_stream));
56e22fb6
EDP		 2409#ifndef FABRICD
2410 /* send a northbound notification */
2411 isis_notif_lsp_too_large(circuit, stream_get_endp(lsp->pdu),
2412 rawlspid_print(lsp->hdr.lsp_id));
2413#endif /* ifndef FABRICD */
e740f9c1 2414 if (IS_DEBUG_PACKET_DUMP)
d62a17ae 2415 zlog_dump_data(STREAM_DATA(lsp->pdu),
2416 stream_get_endp(lsp->pdu));
2417 retval = ISIS_ERROR;
2418 goto out;
2419 }
eb5d44eb 2420
d62a17ae 2421 /* copy our lsp to the send buffer */
2422 stream_copy(circuit->snd_stream, lsp->pdu);
2423
1cbd5b37
CF		 2424 if (tx_type == TX_LSP_CIRCUIT_SCOPED) {
2425 stream_putc_at(circuit->snd_stream, 4, FS_LINK_STATE);
89cdc4df
RM		 2426 stream_putc_at(circuit->snd_stream, 7,
2427 L2_CIRCUIT_FLOODING_SCOPE);
1cbd5b37
CF		 2428 }
2429
e740f9c1 2430 if (IS_DEBUG_UPDATE_PACKETS) {
6cde4b45 2431 zlog_debug("ISIS-Upd (%s): Sending %sL%d LSP %s, seq 0x%08x, cksum 0x%04hx, lifetime %hus on %s",
161fa356
CF		 2432 circuit->area->area_tag,
2433 (tx_type == TX_LSP_CIRCUIT_SCOPED)
2434 ? "Circuit scoped " : "",
2435 lsp->level,
af8ac8f9
CF		 2436 rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.seqno,
2437 lsp->hdr.checksum, lsp->hdr.rem_lifetime,
2438 circuit->interface->name);
e740f9c1 2439 if (IS_DEBUG_PACKET_DUMP)
d62a17ae 2440 zlog_dump_data(STREAM_DATA(circuit->snd_stream),
2441 stream_get_endp(circuit->snd_stream));
2442 }
3f045a08 2443
39bb53d6
CF		 2444 uint8_t pdu_type = (tx_type == TX_LSP_CIRCUIT_SCOPED) ? FS_LINK_STATE
2445 : (lsp->level == ISIS_LEVEL1) ? L1_LINK_STATE
2446 : L2_LINK_STATE;
2447
d62a17ae 2448 clear_srm = 0;
39bb53d6 2449 pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type);
d62a17ae 2450 retval = circuit->tx(circuit, lsp->level);
2451 if (retval != ISIS_OK) {
1a7ecb96 2452 flog_err(EC_ISIS_PACKET,
1c50c1c0
QY		 2453 "ISIS-Upd (%s): Send L%d LSP on %s failed %s",
2454 circuit->area->area_tag, lsp->level,
2455 circuit->interface->name,
2456 (retval == ISIS_WARNING) ? "temporarily"
2457 : "permanently");
d62a17ae 2458 }
f390d2c7 2459
cfd1f27b 2460out:
d62a17ae 2461 if (clear_srm
2462 || (retval == ISIS_OK && circuit->circ_type == CIRCUIT_T_BROADCAST)
2463 || (retval != ISIS_OK && retval != ISIS_WARNING)) {
2464 /* SRM flag will trigger retransmission. We will not retransmit
2465 * if we
2466 * encountered a fatal error.
2467 * On success, they should only be cleared if it's a broadcast
2468 * circuit.
2469 * On a P2P circuit, we will wait for the ack from the neighbor
2470 * to clear
2471 * the fag.
2472 */
9b39405f 2473 isis_tx_queue_del(circuit->tx_queue, lsp);
d62a17ae 2474 }
f390d2c7 2475}
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