2 * IS-IS Rout(e)ing protocol - isis_lsp.c
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>
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)
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
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
40 #include "srcdest_table.h"
41 #include "lib_errors.h"
43 #include "isisd/isis_constants.h"
44 #include "isisd/isis_common.h"
45 #include "isisd/isis_flags.h"
46 #include "isisd/isis_circuit.h"
47 #include "isisd/isisd.h"
48 #include "isisd/isis_lsp.h"
49 #include "isisd/isis_pdu.h"
50 #include "isisd/isis_dynhn.h"
51 #include "isisd/isis_misc.h"
52 #include "isisd/isis_csm.h"
53 #include "isisd/isis_adjacency.h"
54 #include "isisd/isis_spf.h"
55 #include "isisd/isis_mt.h"
56 #include "isisd/isis_tlvs.h"
57 #include "isisd/isis_te.h"
58 #include "isisd/isis_sr.h"
59 #include "isisd/fabricd.h"
60 #include "isisd/isis_tx_queue.h"
61 #include "isisd/isis_nb.h"
63 DEFINE_MTYPE_STATIC(ISISD
, ISIS_LSP
, "ISIS LSP");
65 static int lsp_refresh(struct thread
*thread
);
66 static int lsp_l1_refresh_pseudo(struct thread
*thread
);
67 static int lsp_l2_refresh_pseudo(struct thread
*thread
);
69 static void lsp_destroy(struct isis_lsp
*lsp
);
71 int lsp_id_cmp(uint8_t *id1
, uint8_t *id2
)
73 return memcmp(id1
, id2
, ISIS_SYS_ID_LEN
+ 2);
76 int lspdb_compare(const struct isis_lsp
*a
, const struct isis_lsp
*b
)
78 return memcmp(a
->hdr
.lsp_id
, b
->hdr
.lsp_id
, sizeof(a
->hdr
.lsp_id
));
81 void lsp_db_init(struct lspdb_head
*head
)
86 void lsp_db_fini(struct lspdb_head
*head
)
90 while ((lsp
= lspdb_pop(head
)))
95 struct isis_lsp
*lsp_search(struct lspdb_head
*head
, const uint8_t *id
)
97 struct isis_lsp searchfor
;
98 memcpy(searchfor
.hdr
.lsp_id
, id
, sizeof(searchfor
.hdr
.lsp_id
));
100 return lspdb_find(head
, &searchfor
);
103 static void lsp_clear_data(struct isis_lsp
*lsp
)
108 isis_free_tlvs(lsp
->tlvs
);
112 static void lsp_remove_frags(struct lspdb_head
*head
, struct list
*frags
);
114 static void lsp_destroy(struct isis_lsp
*lsp
)
116 struct listnode
*cnode
;
117 struct isis_circuit
*circuit
;
122 for (ALL_LIST_ELEMENTS_RO(lsp
->area
->circuit_list
, cnode
, circuit
))
123 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
125 ISIS_FLAGS_CLEAR_ALL(lsp
->SSNflags
);
129 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
)) {
130 if (lsp
->lspu
.frags
) {
131 lsp_remove_frags(&lsp
->area
->lspdb
[lsp
->level
- 1],
133 list_delete(&lsp
->lspu
.frags
);
136 if (lsp
->lspu
.zero_lsp
137 && lsp
->lspu
.zero_lsp
->lspu
.frags
) {
138 listnode_delete(lsp
->lspu
.zero_lsp
->lspu
.frags
, lsp
);
142 isis_spf_schedule(lsp
->area
, lsp
->level
);
145 stream_free(lsp
->pdu
);
147 fabricd_lsp_free(lsp
);
148 XFREE(MTYPE_ISIS_LSP
, lsp
);
152 * Remove all the frags belonging to the given lsp
154 static void lsp_remove_frags(struct lspdb_head
*head
, struct list
*frags
)
156 struct listnode
*lnode
, *lnnode
;
157 struct isis_lsp
*lsp
;
159 for (ALL_LIST_ELEMENTS(frags
, lnode
, lnnode
, lsp
)) {
160 lsp
= lsp_search(head
, lsp
->hdr
.lsp_id
);
161 lspdb_del(head
, lsp
);
166 void lsp_search_and_destroy(struct lspdb_head
*head
, const uint8_t *id
)
168 struct isis_lsp
*lsp
;
170 lsp
= lsp_search(head
, id
);
172 lspdb_del(head
, lsp
);
174 * If this is a zero lsp, remove all the frags now
176 if (LSP_FRAGMENT(lsp
->hdr
.lsp_id
) == 0) {
178 lsp_remove_frags(head
, lsp
->lspu
.frags
);
181 * else just remove this frag, from the zero lsps' frag
184 if (lsp
->lspu
.zero_lsp
185 && lsp
->lspu
.zero_lsp
->lspu
.frags
)
186 listnode_delete(lsp
->lspu
.zero_lsp
->lspu
.frags
,
194 * Compares a LSP to given values
195 * Params are given in net order
197 int lsp_compare(char *areatag
, struct isis_lsp
*lsp
, uint32_t seqno
,
198 uint16_t checksum
, uint16_t rem_lifetime
)
200 if (lsp
->hdr
.seqno
== seqno
&& lsp
->hdr
.checksum
== checksum
201 && ((lsp
->hdr
.rem_lifetime
== 0 && rem_lifetime
== 0)
202 || (lsp
->hdr
.rem_lifetime
!= 0 && rem_lifetime
!= 0))) {
203 if (IS_DEBUG_SNP_PACKETS
) {
205 "ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus",
206 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
),
207 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
208 lsp
->hdr
.rem_lifetime
);
210 "ISIS-Snp (%s): is equal to ours seq 0x%08x, cksum 0x%04hx, lifetime %hus",
211 areatag
, seqno
, checksum
, rem_lifetime
);
217 * LSPs with identical checksums should only be treated as newer if:
218 * a) The current LSP has a remaining lifetime != 0 and the other LSP
220 * remaining lifetime == 0. In this case, we should participate in
222 * and should not treat the current LSP with remaining lifetime == 0
224 * b) The LSP has an incorrect checksum. In this case, we need to react
228 if (seqno
> lsp
->hdr
.seqno
229 || (seqno
== lsp
->hdr
.seqno
230 && ((lsp
->hdr
.rem_lifetime
!= 0 && rem_lifetime
== 0)
231 || (lsp
->hdr
.checksum
!= checksum
232 && lsp
->hdr
.rem_lifetime
)))) {
233 if (IS_DEBUG_SNP_PACKETS
) {
235 "ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus",
236 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
), seqno
,
237 checksum
, rem_lifetime
);
239 "ISIS-Snp (%s): is newer than ours seq 0x%08x, cksum 0x%04hx, lifetime %hus",
240 areatag
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
241 lsp
->hdr
.rem_lifetime
);
245 if (IS_DEBUG_SNP_PACKETS
) {
246 zlog_debug("ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus",
247 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
), seqno
,
248 checksum
, rem_lifetime
);
250 "ISIS-Snp (%s): is older than ours seq 0x%08x, cksum 0x%04hx, lifetime %hus",
251 areatag
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
252 lsp
->hdr
.rem_lifetime
);
258 static void put_lsp_hdr(struct isis_lsp
*lsp
, size_t *len_pointer
, bool keep
)
261 (lsp
->level
== IS_LEVEL_1
) ? L1_LINK_STATE
: L2_LINK_STATE
;
262 struct isis_lsp_hdr
*hdr
= &lsp
->hdr
;
263 struct stream
*stream
= lsp
->pdu
;
264 size_t orig_getp
= 0, orig_endp
= 0;
267 orig_getp
= stream_get_getp(lsp
->pdu
);
268 orig_endp
= stream_get_endp(lsp
->pdu
);
271 stream_set_getp(lsp
->pdu
, 0);
272 stream_set_endp(lsp
->pdu
, 0);
274 fill_fixed_hdr(pdu_type
, stream
);
277 *len_pointer
= stream_get_endp(stream
);
278 stream_putw(stream
, hdr
->pdu_len
);
279 stream_putw(stream
, hdr
->rem_lifetime
);
280 stream_put(stream
, hdr
->lsp_id
, sizeof(hdr
->lsp_id
));
281 stream_putl(stream
, hdr
->seqno
);
282 stream_putw(stream
, hdr
->checksum
);
283 stream_putc(stream
, hdr
->lsp_bits
);
286 stream_set_endp(lsp
->pdu
, orig_endp
);
287 stream_set_getp(lsp
->pdu
, orig_getp
);
291 static void lsp_add_auth(struct isis_lsp
*lsp
)
293 struct isis_passwd
*passwd
;
294 passwd
= (lsp
->level
== IS_LEVEL_1
) ? &lsp
->area
->area_passwd
295 : &lsp
->area
->domain_passwd
;
296 isis_tlvs_add_auth(lsp
->tlvs
, passwd
);
299 static void lsp_pack_pdu(struct isis_lsp
*lsp
)
302 lsp
->tlvs
= isis_alloc_tlvs();
307 put_lsp_hdr(lsp
, &len_pointer
, false);
308 isis_pack_tlvs(lsp
->tlvs
, lsp
->pdu
, len_pointer
, false, true);
310 lsp
->hdr
.pdu_len
= stream_get_endp(lsp
->pdu
);
312 ntohs(fletcher_checksum(STREAM_DATA(lsp
->pdu
) + 12,
313 stream_get_endp(lsp
->pdu
) - 12, 12));
316 void lsp_inc_seqno(struct isis_lsp
*lsp
, uint32_t seqno
)
320 if (seqno
== 0 || lsp
->hdr
.seqno
> seqno
)
321 newseq
= lsp
->hdr
.seqno
+ 1;
326 /* check for overflow */
327 if (newseq
< lsp
->hdr
.seqno
) {
328 /* send northbound notification */
329 lsp
->area
->lsp_exceeded_max_counter
++;
330 isis_notif_lsp_exceed_max(lsp
->area
, lsp
->hdr
.lsp_id
);
332 #endif /* ifndef FABRICD */
334 lsp
->hdr
.seqno
= newseq
;
337 isis_spf_schedule(lsp
->area
, lsp
->level
);
340 static void lsp_purge_add_poi(struct isis_lsp
*lsp
,
341 const uint8_t *sender
)
343 if (lsp
->area
== NULL
)
346 if (!lsp
->area
->purge_originator
)
349 /* add purge originator identification */
351 lsp
->tlvs
= isis_alloc_tlvs();
352 isis_tlvs_set_purge_originator(lsp
->tlvs
, lsp
->area
->isis
->sysid
,
354 isis_tlvs_set_dynamic_hostname(lsp
->tlvs
, cmd_hostname_get());
357 static void lsp_purge(struct isis_lsp
*lsp
, int level
,
358 const uint8_t *sender
)
362 stream_reset(lsp
->pdu
);
365 lsp
->hdr
.checksum
= 0;
366 lsp
->hdr
.rem_lifetime
= 0;
368 lsp
->age_out
= lsp
->area
->max_lsp_lifetime
[level
- 1];
369 lsp
->area
->lsp_purge_count
[level
- 1]++;
371 lsp_purge_add_poi(lsp
, sender
);
374 lsp_flood(lsp
, NULL
);
378 * Generates checksum for LSP and its frags
380 static void lsp_seqno_update(struct isis_lsp
*lsp0
)
382 struct isis_lsp
*lsp
;
383 struct listnode
*node
;
385 lsp_inc_seqno(lsp0
, 0);
387 if (!lsp0
->lspu
.frags
)
390 for (ALL_LIST_ELEMENTS_RO(lsp0
->lspu
.frags
, node
, lsp
)) {
392 lsp_inc_seqno(lsp
, 0);
393 else if (lsp
->hdr
.rem_lifetime
) {
394 /* Purge should only be applied when the fragment has
395 * non-zero remaining lifetime.
397 lsp_purge(lsp
, lsp0
->level
, NULL
);
404 static bool isis_level2_adj_up(struct isis_area
*curr_area
)
406 struct listnode
*node
, *cnode
;
407 struct isis_circuit
*circuit
;
409 struct isis_adjacency
*adj
;
410 struct isis
*isis
= curr_area
->isis
;
411 struct isis_area
*area
;
413 /* lookup for a Level2 adjacency up in another area */
414 for (ALL_LIST_ELEMENTS_RO(isis
->area_list
, node
, area
)) {
416 && strcmp(area
->area_tag
, curr_area
->area_tag
) == 0)
419 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, cnode
, circuit
)) {
420 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
) {
421 adjdb
= circuit
->u
.bc
.adjdb
[1];
422 if (!adjdb
|| !adjdb
->count
)
425 for (ALL_LIST_ELEMENTS_RO(adjdb
, node
, adj
)) {
426 if (adj
->level
!= ISIS_ADJ_LEVEL1
427 && adj
->adj_state
== ISIS_ADJ_UP
)
430 } else if (circuit
->circ_type
== CIRCUIT_T_P2P
431 && circuit
->u
.p2p
.neighbor
) {
432 adj
= circuit
->u
.p2p
.neighbor
;
433 if (adj
->level
!= ISIS_ADJ_LEVEL1
434 && adj
->adj_state
== ISIS_ADJ_UP
)
442 static void isis_reset_attach_bit(struct isis_adjacency
*curr_adj
)
444 struct listnode
*node
;
445 struct isis_area
*curr_area
= curr_adj
->circuit
->area
;
446 struct isis
*isis
= curr_area
->isis
;
447 struct isis_area
*area
;
448 struct lspdb_head
*head
;
449 struct isis_lsp
*lsp
;
450 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
452 /* If new adjaceny is up and area is level2 or level1and2 verify if
453 * we have LSPs in other areas that should now set the attach bit.
455 * If adjacenty is down, verify if we no longer have another level2
456 * or level1and2 areas so that we should now remove the attach bit.
458 if (curr_area
->is_type
== IS_LEVEL_1
)
461 for (ALL_LIST_ELEMENTS_RO(isis
->area_list
, node
, area
)) {
463 && strcmp(area
->area_tag
, curr_area
->area_tag
) == 0)
466 if (!area
->attached_bit_send
)
469 head
= &area
->lspdb
[IS_LEVEL_1
- 1];
470 memset(lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
471 memcpy(lspid
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
473 lsp
= lsp_search(head
, lspid
);
477 if (curr_adj
->adj_state
== ISIS_ADJ_UP
478 && !(lsp
->hdr
.lsp_bits
& LSPBIT_ATT
)) {
480 "ISIS (%s): adj going up regenerate lsp-bits",
482 lsp_regenerate_schedule(area
, IS_LEVEL_1
, 0);
483 } else if (curr_adj
->adj_state
== ISIS_ADJ_DOWN
484 && lsp
->hdr
.lsp_bits
& LSPBIT_ATT
485 && !isis_level2_adj_up(area
)) {
487 "ISIS (%s): adj going down regenerate lsp-bits",
489 lsp_regenerate_schedule(area
, IS_LEVEL_1
, 0);
494 static uint8_t lsp_bits_generate(int level
, int overload_bit
, int attached_bit
,
495 struct isis_area
*area
)
497 uint8_t lsp_bits
= 0;
498 if (level
== IS_LEVEL_1
)
499 lsp_bits
= IS_LEVEL_1
;
501 lsp_bits
= IS_LEVEL_1_AND_2
;
503 lsp_bits
|= overload_bit
;
505 /* only set the attach bit if we are a level-1-2 router and this is
506 * a level-1 LSP and we have a level-2 adjacency up from another area
508 if (area
->is_type
== IS_LEVEL_1_AND_2
&& level
== IS_LEVEL_1
509 && attached_bit
&& isis_level2_adj_up(area
))
510 lsp_bits
|= LSPBIT_ATT
;
514 static void lsp_update_data(struct isis_lsp
*lsp
, struct isis_lsp_hdr
*hdr
,
515 struct isis_tlvs
*tlvs
, struct stream
*stream
,
516 struct isis_area
*area
, int level
)
518 /* free the old lsp data */
521 /* copying only the relevant part of our stream */
522 if (lsp
->pdu
!= NULL
)
523 stream_free(lsp
->pdu
);
524 lsp
->pdu
= stream_dup(stream
);
526 memcpy(&lsp
->hdr
, hdr
, sizeof(lsp
->hdr
));
529 lsp
->age_out
= ZERO_AGE_LIFETIME
;
530 lsp
->installed
= time(NULL
);
534 if (area
->dynhostname
&& lsp
->tlvs
->hostname
535 && lsp
->hdr
.rem_lifetime
) {
536 isis_dynhn_insert(lsp
->hdr
.lsp_id
, lsp
->tlvs
->hostname
,
537 (lsp
->hdr
.lsp_bits
& LSPBIT_IST
)
546 static void lsp_link_fragment(struct isis_lsp
*lsp
, struct isis_lsp
*lsp0
)
548 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
)) {
549 /* zero lsp -> create list to store fragments */
550 lsp
->lspu
.frags
= list_new();
552 /* fragment -> set backpointer and add to zero lsps list */
554 lsp
->lspu
.zero_lsp
= lsp0
;
555 listnode_add(lsp0
->lspu
.frags
, lsp
);
559 void lsp_update(struct isis_lsp
*lsp
, struct isis_lsp_hdr
*hdr
,
560 struct isis_tlvs
*tlvs
, struct stream
*stream
,
561 struct isis_area
*area
, int level
, bool confusion
)
566 "ISIS-Upd (%s): BUG updating LSP %s still marked as own LSP",
567 area
->area_tag
, rawlspid_print(lsp
->hdr
.lsp_id
));
573 lsp_purge(lsp
, level
, NULL
);
575 lsp_update_data(lsp
, hdr
, tlvs
, stream
, area
, level
);
578 if (LSP_FRAGMENT(lsp
->hdr
.lsp_id
) && !lsp
->lspu
.zero_lsp
) {
579 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
580 struct isis_lsp
*lsp0
;
582 memcpy(lspid
, lsp
->hdr
.lsp_id
, ISIS_SYS_ID_LEN
+ 1);
583 LSP_FRAGMENT(lspid
) = 0;
584 lsp0
= lsp_search(&area
->lspdb
[level
- 1], lspid
);
586 lsp_link_fragment(lsp
, lsp0
);
590 isis_spf_schedule(lsp
->area
, lsp
->level
);
593 /* creation of LSP directly from what we received */
594 struct isis_lsp
*lsp_new_from_recv(struct isis_lsp_hdr
*hdr
,
595 struct isis_tlvs
*tlvs
,
596 struct stream
*stream
, struct isis_lsp
*lsp0
,
597 struct isis_area
*area
, int level
)
599 struct isis_lsp
*lsp
;
601 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
602 lsp_update_data(lsp
, hdr
, tlvs
, stream
, area
, level
);
603 lsp_link_fragment(lsp
, lsp0
);
608 static void lsp_adjust_stream(struct isis_lsp
*lsp
)
611 if (STREAM_SIZE(lsp
->pdu
) == LLC_LEN
+ lsp
->area
->lsp_mtu
)
613 stream_free(lsp
->pdu
);
616 lsp
->pdu
= stream_new(LLC_LEN
+ lsp
->area
->lsp_mtu
);
619 struct isis_lsp
*lsp_new(struct isis_area
*area
, uint8_t *lsp_id
,
620 uint16_t rem_lifetime
, uint32_t seqno
,
621 uint8_t lsp_bits
, uint16_t checksum
,
622 struct isis_lsp
*lsp0
, int level
)
624 struct isis_lsp
*lsp
;
626 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
629 lsp_adjust_stream(lsp
);
631 /* Minimal LSP PDU size */
632 lsp
->hdr
.pdu_len
= ISIS_FIXED_HDR_LEN
+ ISIS_LSP_HDR_LEN
;
633 memcpy(lsp
->hdr
.lsp_id
, lsp_id
, sizeof(lsp
->hdr
.lsp_id
));
634 lsp
->hdr
.checksum
= checksum
;
635 lsp
->hdr
.seqno
= seqno
;
636 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
637 lsp
->hdr
.lsp_bits
= lsp_bits
;
639 lsp
->age_out
= ZERO_AGE_LIFETIME
;
640 lsp_link_fragment(lsp
, lsp0
);
641 put_lsp_hdr(lsp
, NULL
, false);
644 zlog_debug("New LSP with ID %s-%02x-%02x len %d seqnum %08x",
645 sysid_print(lsp_id
), LSP_PSEUDO_ID(lsp
->hdr
.lsp_id
),
646 LSP_FRAGMENT(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
652 void lsp_insert(struct lspdb_head
*head
, struct isis_lsp
*lsp
)
654 lspdb_add(head
, lsp
);
656 isis_spf_schedule(lsp
->area
, lsp
->level
);
660 * Build a list of LSPs with non-zero ht bounded by start and stop ids
662 void lsp_build_list_nonzero_ht(struct lspdb_head
*head
, const uint8_t *start_id
,
663 const uint8_t *stop_id
, struct list
*list
)
665 struct isis_lsp searchfor
;
666 struct isis_lsp
*lsp
, *start
;
668 memcpy(&searchfor
.hdr
.lsp_id
, start_id
, sizeof(searchfor
.hdr
.lsp_id
));
670 start
= lspdb_find_gteq(head
, &searchfor
);
671 frr_each_from (lspdb
, head
, lsp
, start
) {
672 if (memcmp(lsp
->hdr
.lsp_id
, stop_id
,
673 ISIS_SYS_ID_LEN
+ 2) > 0)
676 if (lsp
->hdr
.rem_lifetime
)
677 listnode_add(list
, lsp
);
681 static void lsp_set_time(struct isis_lsp
*lsp
)
685 if (lsp
->hdr
.rem_lifetime
== 0) {
686 if (lsp
->age_out
> 0)
691 lsp
->hdr
.rem_lifetime
--;
692 if (lsp
->pdu
&& stream_get_endp(lsp
->pdu
) >= 12)
693 stream_putw_at(lsp
->pdu
, 10, lsp
->hdr
.rem_lifetime
);
696 void lspid_print(uint8_t *lsp_id
, char *dest
, size_t dest_len
, char dynhost
,
697 char frag
, struct isis
*isis
)
699 struct isis_dynhn
*dyn
= NULL
;
700 char id
[SYSID_STRLEN
];
703 dyn
= dynhn_find_by_id(lsp_id
);
708 snprintf(id
, sizeof(id
), "%.14s", dyn
->hostname
);
709 else if (!memcmp(isis
->sysid
, lsp_id
, ISIS_SYS_ID_LEN
) && dynhost
)
710 snprintf(id
, sizeof(id
), "%.14s", cmd_hostname_get());
712 memcpy(id
, sysid_print(lsp_id
), 15);
715 snprintf(dest
, dest_len
, "%s.%02x-%02x", id
,
716 LSP_PSEUDO_ID(lsp_id
), LSP_FRAGMENT(lsp_id
));
718 snprintf(dest
, dest_len
, "%s.%02x", id
, LSP_PSEUDO_ID(lsp_id
));
721 /* Convert the lsp attribute bits to attribute string */
722 static const char *lsp_bits2string(uint8_t lsp_bits
, char *buf
, size_t buf_size
)
729 if (buf_size
< 2 * 3)
732 /* we only focus on the default metric */
733 pos
+= snprintf(pos
, buf_size
, "%d/",
734 ISIS_MASK_LSP_ATT_BITS(lsp_bits
) ? 1 : 0);
736 pos
+= snprintf(pos
, buf_size
, "%d/",
737 ISIS_MASK_LSP_PARTITION_BIT(lsp_bits
) ? 1 : 0);
739 snprintf(pos
, buf_size
, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits
) ? 1 : 0);
744 /* this function prints the lsp on show isis database */
745 void lsp_print(struct isis_lsp
*lsp
, struct vty
*vty
, char dynhost
,
752 lspid_print(lsp
->hdr
.lsp_id
, LSPid
, sizeof(LSPid
), dynhost
, 1, isis
);
753 vty_out(vty
, "%-21s%c ", LSPid
, lsp
->own_lsp
? '*' : ' ');
754 vty_out(vty
, "%5hu ", lsp
->hdr
.pdu_len
);
755 vty_out(vty
, "0x%08x ", lsp
->hdr
.seqno
);
756 vty_out(vty
, "0x%04hx ", lsp
->hdr
.checksum
);
757 if (lsp
->hdr
.rem_lifetime
== 0) {
758 snprintf(age_out
, sizeof(age_out
), "(%d)", lsp
->age_out
);
760 vty_out(vty
, "%7s ", age_out
);
762 vty_out(vty
, " %5hu ", lsp
->hdr
.rem_lifetime
);
763 vty_out(vty
, "%s\n", lsp_bits2string(lsp
->hdr
.lsp_bits
, b
, sizeof(b
)));
766 void lsp_print_detail(struct isis_lsp
*lsp
, struct vty
*vty
, char dynhost
,
769 lsp_print(lsp
, vty
, dynhost
, isis
);
771 vty_multiline(vty
, " ", "%s", isis_format_tlvs(lsp
->tlvs
));
775 /* print all the lsps info in the local lspdb */
776 int lsp_print_all(struct vty
*vty
, struct lspdb_head
*head
, char detail
,
777 char dynhost
, struct isis
*isis
)
779 struct isis_lsp
*lsp
;
782 if (detail
== ISIS_UI_LEVEL_BRIEF
) {
783 frr_each (lspdb
, head
, lsp
) {
784 lsp_print(lsp
, vty
, dynhost
, isis
);
787 } else if (detail
== ISIS_UI_LEVEL_DETAIL
) {
788 frr_each (lspdb
, head
, lsp
) {
789 lsp_print_detail(lsp
, vty
, dynhost
, isis
);
797 static uint16_t lsp_rem_lifetime(struct isis_area
*area
, int level
)
799 uint16_t rem_lifetime
;
801 /* Add jitter to configured LSP lifetime */
803 isis_jitter(area
->max_lsp_lifetime
[level
- 1], MAX_AGE_JITTER
);
805 /* No jitter if the max refresh will be less than configure gen interval
807 /* N.B. this calucation is acceptable since rem_lifetime is in
810 if (area
->lsp_gen_interval
[level
- 1] > (rem_lifetime
- 300))
811 rem_lifetime
= area
->max_lsp_lifetime
[level
- 1];
816 static uint16_t lsp_refresh_time(struct isis_lsp
*lsp
, uint16_t rem_lifetime
)
818 struct isis_area
*area
= lsp
->area
;
819 int level
= lsp
->level
;
820 uint16_t refresh_time
;
822 /* Add jitter to LSP refresh time */
824 isis_jitter(area
->lsp_refresh
[level
- 1], MAX_LSP_GEN_JITTER
);
826 /* RFC 4444 : make sure the refresh time is at least less than 300
827 * of the remaining lifetime and more than gen interval */
828 if (refresh_time
<= area
->lsp_gen_interval
[level
- 1]
829 || refresh_time
> (rem_lifetime
- 300))
830 refresh_time
= rem_lifetime
- 300;
832 /* In cornercases, refresh_time might be <= lsp_gen_interval, however
833 * we accept this violation to satisfy refresh_time <= rem_lifetime -
839 static void lsp_build_ext_reach_ipv4(struct isis_lsp
*lsp
,
840 struct isis_area
*area
)
842 struct route_table
*er_table
= get_ext_reach(area
, AF_INET
, lsp
->level
);
846 for (struct route_node
*rn
= route_top(er_table
); rn
;
847 rn
= route_next(rn
)) {
851 struct prefix_ipv4
*ipv4
= (struct prefix_ipv4
*)&rn
->p
;
852 struct isis_ext_info
*info
= rn
->info
;
854 uint32_t metric
= info
->metric
;
855 if (metric
> MAX_WIDE_PATH_METRIC
)
856 metric
= MAX_WIDE_PATH_METRIC
;
857 if (area
->oldmetric
&& metric
> 0x3f)
861 isis_tlvs_add_oldstyle_ip_reach(lsp
->tlvs
, ipv4
,
863 if (area
->newmetric
) {
864 struct sr_prefix_cfg
*pcfg
= NULL
;
866 if (area
->srdb
.enabled
)
867 pcfg
= isis_sr_cfg_prefix_find(area
, ipv4
);
869 isis_tlvs_add_extended_ip_reach(lsp
->tlvs
, ipv4
, metric
,
875 static void lsp_build_ext_reach_ipv6(struct isis_lsp
*lsp
,
876 struct isis_area
*area
)
878 struct route_table
*er_table
=
879 get_ext_reach(area
, AF_INET6
, lsp
->level
);
883 for (struct route_node
*rn
= route_top(er_table
); rn
;
884 rn
= srcdest_route_next(rn
)) {
887 struct isis_ext_info
*info
= rn
->info
;
888 struct prefix_ipv6
*p
, *src_p
;
890 srcdest_rnode_prefixes(rn
, (const struct prefix
**)&p
,
891 (const struct prefix
**)&src_p
);
893 uint32_t metric
= info
->metric
;
894 if (info
->metric
> MAX_WIDE_PATH_METRIC
)
895 metric
= MAX_WIDE_PATH_METRIC
;
897 if (!src_p
|| !src_p
->prefixlen
) {
898 struct sr_prefix_cfg
*pcfg
= NULL
;
900 if (area
->srdb
.enabled
)
901 pcfg
= isis_sr_cfg_prefix_find(area
, p
);
903 isis_tlvs_add_ipv6_reach(lsp
->tlvs
,
904 isis_area_ipv6_topology(area
),
905 p
, metric
, true, pcfg
);
906 } else if (isis_area_ipv6_dstsrc_enabled(area
)) {
907 isis_tlvs_add_ipv6_dstsrc_reach(lsp
->tlvs
,
914 static void lsp_build_ext_reach(struct isis_lsp
*lsp
, struct isis_area
*area
)
916 lsp_build_ext_reach_ipv4(lsp
, area
);
917 lsp_build_ext_reach_ipv6(lsp
, area
);
920 static struct isis_lsp
*lsp_next_frag(uint8_t frag_num
, struct isis_lsp
*lsp0
,
921 struct isis_area
*area
, int level
)
923 struct isis_lsp
*lsp
;
924 uint8_t frag_id
[ISIS_SYS_ID_LEN
+ 2];
926 memcpy(frag_id
, lsp0
->hdr
.lsp_id
, ISIS_SYS_ID_LEN
+ 1);
927 LSP_FRAGMENT(frag_id
) = frag_num
;
929 lsp
= lsp_search(&area
->lspdb
[level
- 1], frag_id
);
932 if (!lsp
->lspu
.zero_lsp
)
933 lsp_link_fragment(lsp
, lsp0
);
937 lsp
= lsp_new(area
, frag_id
, lsp0
->hdr
.rem_lifetime
, 0,
938 lsp_bits_generate(level
, area
->overload_bit
,
939 area
->attached_bit_send
, area
),
942 lsp_insert(&area
->lspdb
[level
- 1], lsp
);
947 * Builds the LSP data part. This func creates a new frag whenever
948 * area->lsp_frag_threshold is exceeded.
950 static void lsp_build(struct isis_lsp
*lsp
, struct isis_area
*area
)
952 int level
= lsp
->level
;
953 struct listnode
*node
;
954 struct isis_lsp
*frag
;
957 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
))
958 lsp_clear_data(frag
);
960 lsp
->tlvs
= isis_alloc_tlvs();
961 lsp_debug("ISIS (%s): Constructing local system LSP for level %d",
962 area
->area_tag
, level
);
964 lsp
->hdr
.lsp_bits
= lsp_bits_generate(level
, area
->overload_bit
,
965 area
->attached_bit_send
, area
);
969 isis_tlvs_add_area_addresses(lsp
->tlvs
, area
->area_addrs
);
971 /* Protocols Supported */
972 if (area
->ip_circuits
> 0 || area
->ipv6_circuits
> 0) {
973 struct nlpids nlpids
= {.count
= 0};
975 if (area
->ip_circuits
> 0) {
977 "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs",
979 nlpids
.nlpids
[nlpids
.count
] = NLPID_IP
;
982 if (area
->ipv6_circuits
> 0) {
984 "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs",
986 nlpids
.nlpids
[nlpids
.count
] = NLPID_IPV6
;
989 isis_tlvs_set_protocols_supported(lsp
->tlvs
, &nlpids
);
992 if (area_is_mt(area
)) {
993 lsp_debug("ISIS (%s): Adding MT router tlv...", area
->area_tag
);
995 struct isis_area_mt_setting
**mt_settings
;
996 unsigned int mt_count
;
998 mt_settings
= area_mt_settings(area
, &mt_count
);
999 for (unsigned int i
= 0; i
< mt_count
; i
++) {
1000 isis_tlvs_add_mt_router_info(
1001 lsp
->tlvs
, mt_settings
[i
]->mtid
,
1002 mt_settings
[i
]->overload
, false);
1003 lsp_debug("ISIS (%s): MT %s", area
->area_tag
,
1004 isis_mtid2str(mt_settings
[i
]->mtid
));
1007 lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)",
1010 /* Dynamic Hostname */
1011 if (area
->dynhostname
) {
1012 isis_tlvs_set_dynamic_hostname(lsp
->tlvs
, cmd_hostname_get());
1013 lsp_debug("ISIS (%s): Adding dynamic hostname '%s'",
1014 area
->area_tag
, cmd_hostname_get());
1016 lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)",
1020 /* Add Router Capability TLV. */
1021 if (area
->isis
->router_id
!= 0) {
1022 struct isis_router_cap cap
= {};
1024 cap
.router_id
.s_addr
= area
->isis
->router_id
;
1026 /* Add SR Sub-TLVs if SR is enabled. */
1027 if (area
->srdb
.enabled
) {
1028 struct isis_sr_db
*srdb
= &area
->srdb
;
1029 uint32_t range_size
;
1032 range_size
= srdb
->config
.srgb_upper_bound
1033 - srdb
->config
.srgb_lower_bound
+ 1;
1034 cap
.srgb
.flags
= ISIS_SUBTLV_SRGB_FLAG_I
1035 | ISIS_SUBTLV_SRGB_FLAG_V
;
1036 cap
.srgb
.range_size
= range_size
;
1037 cap
.srgb
.lower_bound
= srdb
->config
.srgb_lower_bound
;
1038 /* Then Algorithm */
1039 cap
.algo
[0] = SR_ALGORITHM_SPF
;
1040 cap
.algo
[1] = SR_ALGORITHM_UNSET
;
1043 range_size
= srdb
->config
.srlb_upper_bound
1044 - srdb
->config
.srlb_lower_bound
+ 1;
1045 cap
.srlb
.range_size
= range_size
;
1046 cap
.srlb
.lower_bound
= srdb
->config
.srlb_lower_bound
;
1047 /* And finally MSD */
1048 cap
.msd
= srdb
->config
.msd
;
1051 isis_tlvs_set_router_capability(lsp
->tlvs
, &cap
);
1052 lsp_debug("ISIS (%s): Adding Router Capabilities information",
1056 /* IPv4 address and TE router ID TLVs.
1057 * In case of the first one we don't follow "C" vendor,
1058 * but "J" vendor behavior - one IPv4 address is put
1059 * into LSP. TE router ID will be the same if MPLS-TE
1060 * is not activate or MPLS-TE router-id not specified
1062 if (area
->isis
->router_id
!= 0) {
1063 struct in_addr id
= {.s_addr
= area
->isis
->router_id
};
1064 lsp_debug("ISIS (%s): Adding router ID %pI4 as IPv4 tlv.",
1065 area
->area_tag
, &id
);
1066 isis_tlvs_add_ipv4_address(lsp
->tlvs
, &id
);
1068 /* If new style TLV's are in use, add TE router ID TLV
1069 * Check if MPLS-TE is activate and mpls-te router-id set
1070 * otherwise add exactly same data as for IPv4 address
1072 if (area
->newmetric
) {
1073 if (IS_MPLS_TE(area
->mta
)
1074 && area
->mta
->router_id
.s_addr
!= INADDR_ANY
)
1075 id
.s_addr
= area
->mta
->router_id
.s_addr
;
1077 "ISIS (%s): Adding router ID also as TE router ID tlv.",
1079 isis_tlvs_set_te_router_id(lsp
->tlvs
, &id
);
1082 lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.",
1086 lsp_debug("ISIS (%s): Adding circuit specific information.",
1091 "ISIS (%s): Adding tier %hhu spine-leaf-extension tlv.",
1092 area
->area_tag
, fabricd_tier(area
));
1093 isis_tlvs_add_spine_leaf(lsp
->tlvs
, fabricd_tier(area
), true,
1094 false, false, false);
1097 struct isis_circuit
*circuit
;
1098 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, node
, circuit
)) {
1099 if (!circuit
->interface
)
1101 "ISIS (%s): Processing %s circuit %p with unknown interface",
1103 circuit_type2string(circuit
->circ_type
),
1106 lsp_debug("ISIS (%s): Processing %s circuit %s",
1108 circuit_type2string(circuit
->circ_type
),
1109 circuit
->interface
->name
);
1111 if (circuit
->state
!= C_STATE_UP
) {
1112 lsp_debug("ISIS (%s): Circuit is not up, ignoring.",
1117 uint32_t metric
= area
->oldmetric
1118 ? circuit
->metric
[level
- 1]
1119 : circuit
->te_metric
[level
- 1];
1121 if (circuit
->ip_router
&& circuit
->ip_addrs
1122 && circuit
->ip_addrs
->count
> 0) {
1124 "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.",
1126 struct listnode
*ipnode
;
1127 struct prefix_ipv4
*ipv4
;
1128 for (ALL_LIST_ELEMENTS_RO(circuit
->ip_addrs
, ipnode
,
1130 if (area
->oldmetric
) {
1132 "ISIS (%s): Adding old-style IP reachability for %pFX",
1133 area
->area_tag
, ipv4
);
1134 isis_tlvs_add_oldstyle_ip_reach(
1135 lsp
->tlvs
, ipv4
, metric
);
1138 if (area
->newmetric
) {
1139 struct sr_prefix_cfg
*pcfg
= NULL
;
1142 "ISIS (%s): Adding te-style IP reachability for %pFX",
1143 area
->area_tag
, ipv4
);
1145 if (area
->srdb
.enabled
)
1146 pcfg
= isis_sr_cfg_prefix_find(
1149 isis_tlvs_add_extended_ip_reach(
1150 lsp
->tlvs
, ipv4
, metric
, false,
1156 if (circuit
->ipv6_router
&& circuit
->ipv6_non_link
1157 && circuit
->ipv6_non_link
->count
> 0) {
1158 struct listnode
*ipnode
;
1159 struct prefix_ipv6
*ipv6
;
1161 for (ALL_LIST_ELEMENTS_RO(circuit
->ipv6_non_link
,
1163 struct sr_prefix_cfg
*pcfg
= NULL
;
1166 "ISIS (%s): Adding IPv6 reachability for %pFX",
1167 area
->area_tag
, ipv6
);
1169 if (area
->srdb
.enabled
)
1170 pcfg
= isis_sr_cfg_prefix_find(area
,
1173 isis_tlvs_add_ipv6_reach(
1175 isis_area_ipv6_topology(area
), ipv6
,
1176 metric
, false, pcfg
);
1180 switch (circuit
->circ_type
) {
1181 case CIRCUIT_T_BROADCAST
:
1182 if (level
& circuit
->is_type
) {
1184 (level
== IS_LEVEL_1
)
1185 ? circuit
->u
.bc
.l1_desig_is
1186 : circuit
->u
.bc
.l2_desig_is
;
1188 if (LSP_PSEUDO_ID(ne_id
)) {
1189 if (area
->oldmetric
) {
1191 "ISIS (%s): Adding DIS %s.%02x as old-style neighbor",
1194 LSP_PSEUDO_ID(ne_id
));
1195 isis_tlvs_add_oldstyle_reach(
1199 if (area
->newmetric
)
1202 level
, ne_id
, metric
);
1206 "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors",
1210 case CIRCUIT_T_P2P
: {
1211 struct isis_adjacency
*nei
= circuit
->u
.p2p
.neighbor
;
1212 if (nei
&& nei
->adj_state
== ISIS_ADJ_UP
1213 && (level
& nei
->circuit_t
)) {
1215 memcpy(ne_id
, nei
->sysid
, ISIS_SYS_ID_LEN
);
1216 LSP_PSEUDO_ID(ne_id
) = 0;
1218 if (area
->oldmetric
) {
1220 "ISIS (%s): Adding old-style is reach for %s",
1222 sysid_print(ne_id
));
1223 isis_tlvs_add_oldstyle_reach(
1224 lsp
->tlvs
, ne_id
, metric
);
1226 if (area
->newmetric
) {
1227 uint32_t neighbor_metric
;
1228 if (fabricd_tier(area
) == 0) {
1229 neighbor_metric
= 0xffe;
1231 neighbor_metric
= metric
;
1234 tlvs_add_mt_p2p(lsp
->tlvs
, circuit
,
1235 ne_id
, neighbor_metric
);
1239 "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors",
1243 case CIRCUIT_T_LOOPBACK
:
1246 zlog_warn("lsp_area_create: unknown circuit type");
1250 lsp_build_ext_reach(lsp
, area
);
1252 struct isis_tlvs
*tlvs
= lsp
->tlvs
;
1255 lsp_adjust_stream(lsp
);
1257 size_t tlv_space
= STREAM_WRITEABLE(lsp
->pdu
) - LLC_LEN
;
1258 lsp_clear_data(lsp
);
1260 struct list
*fragments
= isis_fragment_tlvs(tlvs
, tlv_space
);
1262 zlog_warn("BUG: could not fragment own LSP:");
1263 log_multiline(LOG_WARNING
, " ", "%s",
1264 isis_format_tlvs(tlvs
));
1265 isis_free_tlvs(tlvs
);
1268 isis_free_tlvs(tlvs
);
1270 bool fragment_overflow
= false;
1272 for (ALL_LIST_ELEMENTS_RO(fragments
, node
, tlvs
)) {
1273 if (node
!= listhead(fragments
)) {
1274 if (LSP_FRAGMENT(frag
->hdr
.lsp_id
) == 255) {
1275 if (!fragment_overflow
) {
1276 fragment_overflow
= true;
1278 "ISIS (%s): Too much information for 256 fragments",
1281 isis_free_tlvs(tlvs
);
1285 frag
= lsp_next_frag(LSP_FRAGMENT(frag
->hdr
.lsp_id
) + 1,
1287 lsp_adjust_stream(frag
);
1292 list_delete(&fragments
);
1293 lsp_debug("ISIS (%s): LSP construction is complete. Serializing...",
1299 * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs
1301 int lsp_generate(struct isis_area
*area
, int level
)
1303 struct isis_lsp
*oldlsp
, *newlsp
;
1304 uint32_t seq_num
= 0;
1305 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
1306 uint16_t rem_lifetime
, refresh_time
;
1308 if ((area
== NULL
) || (area
->is_type
& level
) != level
)
1311 memset(&lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
1313 memcpy(&lspid
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1315 /* only builds the lsp if the area shares the level */
1316 oldlsp
= lsp_search(&area
->lspdb
[level
- 1], lspid
);
1318 /* FIXME: we should actually initiate a purge */
1319 seq_num
= oldlsp
->hdr
.seqno
;
1320 lsp_search_and_destroy(&area
->lspdb
[level
- 1],
1321 oldlsp
->hdr
.lsp_id
);
1323 rem_lifetime
= lsp_rem_lifetime(area
, level
);
1324 newlsp
= lsp_new(area
, lspid
, rem_lifetime
, seq_num
,
1325 lsp_bits_generate(area
->is_type
, area
->overload_bit
,
1326 area
->attached_bit_send
, area
),
1328 newlsp
->area
= area
;
1329 newlsp
->own_lsp
= 1;
1331 lsp_insert(&area
->lspdb
[level
- 1], newlsp
);
1332 /* build_lsp_data (newlsp, area); */
1333 lsp_build(newlsp
, area
);
1334 /* time to calculate our checksum */
1335 lsp_seqno_update(newlsp
);
1336 newlsp
->last_generated
= time(NULL
);
1337 lsp_flood(newlsp
, NULL
);
1338 area
->lsp_gen_count
[level
- 1]++;
1340 refresh_time
= lsp_refresh_time(newlsp
, rem_lifetime
);
1342 thread_cancel(&area
->t_lsp_refresh
[level
- 1]);
1343 area
->lsp_regenerate_pending
[level
- 1] = 0;
1344 thread_add_timer(master
, lsp_refresh
,
1345 &area
->lsp_refresh_arg
[level
- 1], refresh_time
,
1346 &area
->t_lsp_refresh
[level
- 1]);
1348 if (IS_DEBUG_UPDATE_PACKETS
) {
1349 zlog_debug("ISIS-Upd (%s): Building L%d LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus refresh %hus",
1350 area
->area_tag
, level
,
1351 rawlspid_print(newlsp
->hdr
.lsp_id
),
1352 newlsp
->hdr
.pdu_len
, newlsp
->hdr
.seqno
,
1353 newlsp
->hdr
.checksum
, newlsp
->hdr
.rem_lifetime
,
1357 "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.",
1358 area
->area_tag
, level
);
1361 /* send northbound notification */
1362 isis_notif_lsp_gen(area
, newlsp
->hdr
.lsp_id
, newlsp
->hdr
.seqno
,
1363 newlsp
->last_generated
);
1364 #endif /* ifndef FABRICD */
1370 * Search own LSPs, update holding time and flood
1372 static int lsp_regenerate(struct isis_area
*area
, int level
)
1374 struct lspdb_head
*head
;
1375 struct isis_lsp
*lsp
, *frag
;
1376 struct listnode
*node
;
1377 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
1378 uint16_t rem_lifetime
, refresh_time
;
1380 if ((area
== NULL
) || (area
->is_type
& level
) != level
)
1383 head
= &area
->lspdb
[level
- 1];
1384 memset(lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
1385 memcpy(lspid
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1387 lsp
= lsp_search(head
, lspid
);
1390 flog_err(EC_LIB_DEVELOPMENT
,
1391 "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!",
1392 area
->area_tag
, level
);
1396 lsp_clear_data(lsp
);
1397 lsp_build(lsp
, area
);
1398 rem_lifetime
= lsp_rem_lifetime(area
, level
);
1399 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
1400 lsp
->last_generated
= time(NULL
);
1401 lsp_flood(lsp
, NULL
);
1402 area
->lsp_gen_count
[level
- 1]++;
1403 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
)) {
1405 /* Updating and flooding should only affect fragments
1411 frag
->hdr
.lsp_bits
=
1412 lsp_bits_generate(level
, area
->overload_bit
,
1413 area
->attached_bit_send
, area
);
1414 /* Set the lifetime values of all the fragments to the same
1416 * so that no fragment expires before the lsp is refreshed.
1418 frag
->hdr
.rem_lifetime
= rem_lifetime
;
1419 frag
->age_out
= ZERO_AGE_LIFETIME
;
1420 lsp_flood(frag
, NULL
);
1422 lsp_seqno_update(lsp
);
1424 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1425 thread_add_timer(master
, lsp_refresh
,
1426 &area
->lsp_refresh_arg
[level
- 1], refresh_time
,
1427 &area
->t_lsp_refresh
[level
- 1]);
1428 area
->lsp_regenerate_pending
[level
- 1] = 0;
1430 if (IS_DEBUG_UPDATE_PACKETS
) {
1432 "ISIS-Upd (%s): Refreshed our L%d LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus refresh %hus",
1433 area
->area_tag
, level
, rawlspid_print(lsp
->hdr
.lsp_id
),
1434 lsp
->hdr
.pdu_len
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1435 lsp
->hdr
.rem_lifetime
, refresh_time
);
1438 "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.",
1439 area
->area_tag
, level
);
1445 * Something has changed or periodic refresh -> regenerate LSP
1447 static int lsp_refresh(struct thread
*thread
)
1449 struct lsp_refresh_arg
*arg
= THREAD_ARG(thread
);
1453 struct isis_area
*area
= arg
->area
;
1457 int level
= arg
->level
;
1459 area
->t_lsp_refresh
[level
- 1] = NULL
;
1460 area
->lsp_regenerate_pending
[level
- 1] = 0;
1462 if ((area
->is_type
& level
) == 0)
1466 * Throttle regeneration of LSPs (but not when BFD signalled a 'down'
1469 if (monotime_since(&area
->last_lsp_refresh_event
[level
- 1], NULL
)
1471 && !(area
->bfd_force_spf_refresh
)) {
1472 sched_debug("ISIS (%s): Still unstable, postpone LSP L%d refresh",
1473 area
->area_tag
, level
);
1474 _lsp_regenerate_schedule(area
, level
, 0, false,
1475 __func__
, __FILE__
, __LINE__
);
1480 "ISIS (%s): LSP L%d refresh timer expired. Refreshing LSP...",
1481 area
->area_tag
, level
);
1482 return lsp_regenerate(area
, level
);
1485 int _lsp_regenerate_schedule(struct isis_area
*area
, int level
,
1486 int all_pseudo
, bool postpone
,
1487 const char *func
, const char *file
,
1490 struct isis_lsp
*lsp
;
1491 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1494 struct listnode
*cnode
;
1495 struct isis_circuit
*circuit
;
1502 "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs Caller: %s %s:%d",
1503 area
->area_tag
, circuit_t2string(level
),
1504 all_pseudo
? "" : "not ",
1507 memcpy(id
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1508 LSP_PSEUDO_ID(id
) = LSP_FRAGMENT(id
) = 0;
1511 for (lvl
= IS_LEVEL_1
; lvl
<= IS_LEVEL_2
; lvl
++) {
1512 if (!((level
& lvl
) && (area
->is_type
& lvl
)))
1516 monotime(&area
->last_lsp_refresh_event
[lvl
- 1]);
1520 "ISIS (%s): Checking whether L%d needs to be scheduled",
1521 area
->area_tag
, lvl
);
1523 if (area
->lsp_regenerate_pending
[lvl
- 1]
1524 && !(area
->bfd_signalled_down
)) {
1526 * Note: in case of a BFD 'down' message the refresh is
1527 * scheduled once again just to be sure
1529 struct timeval remain
= thread_timer_remain(
1530 area
->t_lsp_refresh
[lvl
- 1]);
1532 "ISIS (%s): Regeneration is already pending, nothing todo. (Due in %lld.%03lld seconds)",
1533 area
->area_tag
, (long long)remain
.tv_sec
,
1534 (long long)remain
.tv_usec
/ 1000);
1538 lsp
= lsp_search(&area
->lspdb
[lvl
- 1], id
);
1541 "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.",
1547 * Throttle avoidance
1550 "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld",
1551 area
->area_tag
, (long long)lsp
->last_generated
,
1553 thread_cancel(&area
->t_lsp_refresh
[lvl
- 1]);
1554 diff
= now
- lsp
->last_generated
;
1555 if (diff
< area
->lsp_gen_interval
[lvl
- 1]
1556 && !(area
->bfd_signalled_down
)) {
1558 1000 * (area
->lsp_gen_interval
[lvl
- 1] - diff
);
1560 "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval",
1561 area
->area_tag
, timeout
);
1564 * Schedule LSP refresh ASAP
1566 if (area
->bfd_signalled_down
) {
1568 "ISIS (%s): Scheduling immediately due to BFD 'down' message.",
1570 area
->bfd_signalled_down
= false;
1571 area
->bfd_force_spf_refresh
= true;
1574 int64_t time_since_last
= monotime_since(
1575 &area
->last_lsp_refresh_event
[lvl
- 1],
1577 timeout
= time_since_last
< 100000L
1578 ? (100000L - time_since_last
)/1000
1582 "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution in %ld ms due to the instability timer.",
1583 area
->area_tag
, timeout
);
1586 "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution now.",
1591 area
->lsp_regenerate_pending
[lvl
- 1] = 1;
1592 thread_add_timer_msec(master
, lsp_refresh
,
1593 &area
->lsp_refresh_arg
[lvl
- 1],
1595 &area
->t_lsp_refresh
[lvl
- 1]);
1599 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, cnode
, circuit
))
1600 lsp_regenerate_schedule_pseudo(circuit
, level
);
1607 * Funcs for pseudonode LSPs
1611 * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs
1613 static void lsp_build_pseudo(struct isis_lsp
*lsp
, struct isis_circuit
*circuit
,
1616 struct isis_adjacency
*adj
;
1617 struct list
*adj_list
;
1618 struct listnode
*node
;
1619 struct isis_area
*area
= circuit
->area
;
1621 lsp_clear_data(lsp
);
1622 lsp
->tlvs
= isis_alloc_tlvs();
1624 "ISIS (%s): Constructing pseudo LSP %s for interface %s level %d",
1625 area
->area_tag
, rawlspid_print(lsp
->hdr
.lsp_id
),
1626 circuit
->interface
->name
, level
);
1629 /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
1630 lsp
->hdr
.lsp_bits
= lsp_bits_generate(
1631 level
, 0, circuit
->area
->attached_bit_send
, area
);
1634 * add self to IS neighbours
1636 uint8_t ne_id
[ISIS_SYS_ID_LEN
+ 1];
1638 memcpy(ne_id
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1639 LSP_PSEUDO_ID(ne_id
) = 0;
1641 if (circuit
->area
->oldmetric
) {
1642 isis_tlvs_add_oldstyle_reach(lsp
->tlvs
, ne_id
, 0);
1644 "ISIS (%s): Adding %s.%02x as old-style neighbor (self)",
1645 area
->area_tag
, sysid_print(ne_id
),
1646 LSP_PSEUDO_ID(ne_id
));
1648 if (circuit
->area
->newmetric
) {
1649 isis_tlvs_add_extended_reach(lsp
->tlvs
, ISIS_MT_IPV4_UNICAST
,
1652 "ISIS (%s): Adding %s.%02x as te-style neighbor (self)",
1653 area
->area_tag
, sysid_print(ne_id
),
1654 LSP_PSEUDO_ID(ne_id
));
1657 adj_list
= list_new();
1658 isis_adj_build_up_list(circuit
->u
.bc
.adjdb
[level
- 1], adj_list
);
1660 for (ALL_LIST_ELEMENTS_RO(adj_list
, node
, adj
)) {
1661 if (!(adj
->level
& level
)) {
1663 "ISIS (%s): Ignoring neighbor %s, level does not intersect",
1664 area
->area_tag
, sysid_print(adj
->sysid
));
1668 if (!(level
== IS_LEVEL_1
1669 && adj
->sys_type
== ISIS_SYSTYPE_L1_IS
)
1670 && !(level
== IS_LEVEL_1
1671 && adj
->sys_type
== ISIS_SYSTYPE_L2_IS
1672 && adj
->adj_usage
== ISIS_ADJ_LEVEL1AND2
)
1673 && !(level
== IS_LEVEL_2
1674 && adj
->sys_type
== ISIS_SYSTYPE_L2_IS
)) {
1676 "ISIS (%s): Ignoring neighbor %s, level does not match",
1677 area
->area_tag
, sysid_print(adj
->sysid
));
1681 memcpy(ne_id
, adj
->sysid
, ISIS_SYS_ID_LEN
);
1682 if (circuit
->area
->oldmetric
) {
1683 isis_tlvs_add_oldstyle_reach(lsp
->tlvs
, ne_id
, 0);
1685 "ISIS (%s): Adding %s.%02x as old-style neighbor (peer)",
1686 area
->area_tag
, sysid_print(ne_id
),
1687 LSP_PSEUDO_ID(ne_id
));
1689 if (circuit
->area
->newmetric
) {
1690 isis_tlvs_add_extended_reach(lsp
->tlvs
,
1691 ISIS_MT_IPV4_UNICAST
,
1694 "ISIS (%s): Adding %s.%02x as te-style neighbor (peer)",
1695 area
->area_tag
, sysid_print(ne_id
),
1696 LSP_PSEUDO_ID(ne_id
));
1699 list_delete(&adj_list
);
1703 int lsp_generate_pseudo(struct isis_circuit
*circuit
, int level
)
1705 struct lspdb_head
*head
= &circuit
->area
->lspdb
[level
- 1];
1706 struct isis_lsp
*lsp
;
1707 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1708 uint16_t rem_lifetime
, refresh_time
;
1710 if ((circuit
->is_type
& level
) != level
1711 || (circuit
->state
!= C_STATE_UP
)
1712 || (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1713 || (circuit
->u
.bc
.is_dr
[level
- 1] == 0))
1716 memcpy(lsp_id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1717 LSP_FRAGMENT(lsp_id
) = 0;
1718 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1721 * If for some reason have a pseudo LSP in the db already -> regenerate
1723 if (lsp_search(head
, lsp_id
))
1724 return lsp_regenerate_schedule_pseudo(circuit
, level
);
1726 rem_lifetime
= lsp_rem_lifetime(circuit
->area
, level
);
1727 /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
1728 lsp
= lsp_new(circuit
->area
, lsp_id
, rem_lifetime
, 1,
1729 lsp_bits_generate(circuit
->area
->is_type
, 0,
1730 circuit
->area
->attached_bit_send
,
1733 lsp
->area
= circuit
->area
;
1735 lsp_build_pseudo(lsp
, circuit
, level
);
1738 lsp_insert(head
, lsp
);
1739 lsp_flood(lsp
, NULL
);
1741 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1742 thread_cancel(&circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1743 circuit
->lsp_regenerate_pending
[level
- 1] = 0;
1744 if (level
== IS_LEVEL_1
)
1746 master
, lsp_l1_refresh_pseudo
, circuit
, refresh_time
,
1747 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1748 else if (level
== IS_LEVEL_2
)
1750 master
, lsp_l2_refresh_pseudo
, circuit
, refresh_time
,
1751 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1753 if (IS_DEBUG_UPDATE_PACKETS
) {
1755 "ISIS-Upd (%s): Built L%d Pseudo LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus, refresh %hus",
1756 circuit
->area
->area_tag
, level
,
1757 rawlspid_print(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
1758 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1759 lsp
->hdr
.rem_lifetime
, refresh_time
);
1765 static int lsp_regenerate_pseudo(struct isis_circuit
*circuit
, int level
)
1767 struct lspdb_head
*head
= &circuit
->area
->lspdb
[level
- 1];
1768 struct isis_lsp
*lsp
;
1769 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1770 uint16_t rem_lifetime
, refresh_time
;
1772 if ((circuit
->is_type
& level
) != level
1773 || (circuit
->state
!= C_STATE_UP
)
1774 || (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1775 || (circuit
->u
.bc
.is_dr
[level
- 1] == 0))
1778 memcpy(lsp_id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1779 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1780 LSP_FRAGMENT(lsp_id
) = 0;
1782 lsp
= lsp_search(head
, lsp_id
);
1785 flog_err(EC_LIB_DEVELOPMENT
,
1786 "lsp_regenerate_pseudo: no l%d LSP %s found!", level
,
1787 rawlspid_print(lsp_id
));
1791 rem_lifetime
= lsp_rem_lifetime(circuit
->area
, level
);
1792 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
1793 lsp_build_pseudo(lsp
, circuit
, level
);
1794 lsp_inc_seqno(lsp
, 0);
1795 lsp
->last_generated
= time(NULL
);
1796 lsp_flood(lsp
, NULL
);
1798 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1799 if (level
== IS_LEVEL_1
)
1801 master
, lsp_l1_refresh_pseudo
, circuit
, refresh_time
,
1802 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1803 else if (level
== IS_LEVEL_2
)
1805 master
, lsp_l2_refresh_pseudo
, circuit
, refresh_time
,
1806 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1808 if (IS_DEBUG_UPDATE_PACKETS
) {
1810 "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus, refresh %hus",
1811 circuit
->area
->area_tag
, level
,
1812 rawlspid_print(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
1813 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1814 lsp
->hdr
.rem_lifetime
, refresh_time
);
1821 * Something has changed or periodic refresh -> regenerate pseudo LSP
1823 static int lsp_l1_refresh_pseudo(struct thread
*thread
)
1825 struct isis_circuit
*circuit
;
1826 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1828 circuit
= THREAD_ARG(thread
);
1830 circuit
->u
.bc
.t_refresh_pseudo_lsp
[0] = NULL
;
1831 circuit
->lsp_regenerate_pending
[0] = 0;
1833 if ((circuit
->u
.bc
.is_dr
[0] == 0)
1834 || (circuit
->is_type
& IS_LEVEL_1
) == 0) {
1835 memcpy(id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1836 LSP_PSEUDO_ID(id
) = circuit
->circuit_id
;
1837 LSP_FRAGMENT(id
) = 0;
1838 lsp_purge_pseudo(id
, circuit
, IS_LEVEL_1
);
1842 return lsp_regenerate_pseudo(circuit
, IS_LEVEL_1
);
1845 static int lsp_l2_refresh_pseudo(struct thread
*thread
)
1847 struct isis_circuit
*circuit
;
1848 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1850 circuit
= THREAD_ARG(thread
);
1852 circuit
->u
.bc
.t_refresh_pseudo_lsp
[1] = NULL
;
1853 circuit
->lsp_regenerate_pending
[1] = 0;
1855 if ((circuit
->u
.bc
.is_dr
[1] == 0)
1856 || (circuit
->is_type
& IS_LEVEL_2
) == 0) {
1857 memcpy(id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1858 LSP_PSEUDO_ID(id
) = circuit
->circuit_id
;
1859 LSP_FRAGMENT(id
) = 0;
1860 lsp_purge_pseudo(id
, circuit
, IS_LEVEL_2
);
1864 return lsp_regenerate_pseudo(circuit
, IS_LEVEL_2
);
1867 int lsp_regenerate_schedule_pseudo(struct isis_circuit
*circuit
, int level
)
1869 struct isis_lsp
*lsp
;
1870 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1874 struct isis_area
*area
= circuit
->area
;
1876 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
1877 || circuit
->state
!= C_STATE_UP
)
1881 "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s",
1882 area
->area_tag
, circuit_t2string(level
),
1883 circuit
->interface
->name
);
1885 memcpy(lsp_id
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1886 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1887 LSP_FRAGMENT(lsp_id
) = 0;
1890 for (lvl
= IS_LEVEL_1
; lvl
<= IS_LEVEL_2
; lvl
++) {
1892 "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled",
1893 area
->area_tag
, lvl
);
1895 if (!((level
& lvl
) && (circuit
->is_type
& lvl
))) {
1896 sched_debug("ISIS (%s): Level is not active on circuit",
1901 if (circuit
->u
.bc
.is_dr
[lvl
- 1] == 0) {
1903 "ISIS (%s): This IS is not DR, nothing to do.",
1908 if (circuit
->lsp_regenerate_pending
[lvl
- 1]) {
1909 struct timeval remain
= thread_timer_remain(
1910 circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1912 "ISIS (%s): Regenerate is already pending, nothing todo. (Due in %lld.%03lld seconds)",
1913 area
->area_tag
, (long long)remain
.tv_sec
,
1914 (long long)remain
.tv_usec
/ 1000);
1918 lsp
= lsp_search(&circuit
->area
->lspdb
[lvl
- 1], lsp_id
);
1921 "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.",
1927 * Throttle avoidance
1930 "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld",
1931 area
->area_tag
, (long long)lsp
->last_generated
,
1933 thread_cancel(&circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1934 diff
= now
- lsp
->last_generated
;
1935 if (diff
< circuit
->area
->lsp_gen_interval
[lvl
- 1]) {
1937 1000 * (circuit
->area
->lsp_gen_interval
[lvl
- 1]
1940 "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval",
1941 area
->area_tag
, timeout
);
1945 "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution in %ld ms.",
1946 area
->area_tag
, timeout
);
1949 circuit
->lsp_regenerate_pending
[lvl
- 1] = 1;
1951 if (lvl
== IS_LEVEL_1
) {
1952 thread_add_timer_msec(
1953 master
, lsp_l1_refresh_pseudo
, circuit
, timeout
,
1954 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1955 } else if (lvl
== IS_LEVEL_2
) {
1956 thread_add_timer_msec(
1957 master
, lsp_l2_refresh_pseudo
, circuit
, timeout
,
1958 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1966 * Walk through LSPs for an area
1967 * - set remaining lifetime
1969 int lsp_tick(struct thread
*thread
)
1971 struct isis_area
*area
;
1972 struct isis_lsp
*lsp
;
1974 uint16_t rem_lifetime
;
1975 bool fabricd_sync_incomplete
= false;
1977 area
= THREAD_ARG(thread
);
1979 area
->t_tick
= NULL
;
1980 thread_add_timer(master
, lsp_tick
, area
, 1, &area
->t_tick
);
1982 struct isis_circuit
*fabricd_init_c
= fabricd_initial_sync_circuit(area
);
1985 * Remove LSPs which have aged out
1987 for (level
= 0; level
< ISIS_LEVELS
; level
++) {
1988 struct isis_lsp
*next
= lspdb_first(&area
->lspdb
[level
]);
1989 frr_each_from (lspdb
, &area
->lspdb
[level
], lsp
, next
) {
1991 * The lsp rem_lifetime is kept at 0 for MaxAge
1993 * ZeroAgeLifetime depending on explicit purge
1995 * natural age out. So schedule spf only once
1997 * the first time rem_lifetime becomes 0.
1999 rem_lifetime
= lsp
->hdr
.rem_lifetime
;
2003 * Schedule may run spf which should be done
2005 * the lsp rem_lifetime becomes 0 for the first
2007 * ISO 10589 - 7.3.16.4 first paragraph.
2009 if (rem_lifetime
== 1 && lsp
->hdr
.seqno
!= 0) {
2010 /* 7.3.16.4 a) set SRM flags on all */
2011 /* 7.3.16.4 b) retain only the header */
2012 if (lsp
->area
->purge_originator
)
2013 lsp_purge(lsp
, lsp
->level
, NULL
);
2015 lsp_flood(lsp
, NULL
);
2016 /* 7.3.16.4 c) record the time to purge
2018 isis_spf_schedule(lsp
->area
, lsp
->level
);
2021 if (lsp
->age_out
== 0) {
2023 "ISIS-Upd (%s): L%u LSP %s seq 0x%08x aged out",
2024 area
->area_tag
, lsp
->level
,
2025 rawlspid_print(lsp
->hdr
.lsp_id
),
2028 /* if we're aging out fragment 0, lsp_destroy()
2029 * below will delete all other fragments too,
2030 * so we need to skip over those
2032 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
))
2034 !memcmp(next
->hdr
.lsp_id
,
2036 ISIS_SYS_ID_LEN
+ 1))
2038 &area
->lspdb
[level
],
2041 lspdb_del(&area
->lspdb
[level
], lsp
);
2046 if (fabricd_init_c
&& lsp
) {
2047 fabricd_sync_incomplete
|=
2048 ISIS_CHECK_FLAG(lsp
->SSNflags
,
2055 && !fabricd_sync_incomplete
2056 && !isis_tx_queue_len(fabricd_init_c
->tx_queue
)) {
2057 fabricd_initial_sync_finish(area
);
2063 void lsp_purge_pseudo(uint8_t *id
, struct isis_circuit
*circuit
, int level
)
2065 struct isis_lsp
*lsp
;
2067 lsp
= lsp_search(&circuit
->area
->lspdb
[level
- 1], id
);
2071 lsp_purge(lsp
, level
, NULL
);
2075 * Purge own LSP that is received and we don't have.
2076 * -> Do as in 7.3.16.4
2078 void lsp_purge_non_exist(int level
, struct isis_lsp_hdr
*hdr
,
2079 struct isis_area
*area
)
2081 struct isis_lsp
*lsp
;
2084 * We need to create the LSP to be purged
2086 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
2089 lsp_adjust_stream(lsp
);
2090 lsp
->age_out
= ZERO_AGE_LIFETIME
;
2091 lsp
->area
->lsp_purge_count
[level
- 1]++;
2093 memcpy(&lsp
->hdr
, hdr
, sizeof(lsp
->hdr
));
2094 lsp
->hdr
.rem_lifetime
= 0;
2096 lsp_purge_add_poi(lsp
, NULL
);
2100 lsp_insert(&area
->lspdb
[lsp
->level
- 1], lsp
);
2101 lsp_flood(lsp
, NULL
);
2106 void lsp_set_all_srmflags(struct isis_lsp
*lsp
, bool set
)
2108 struct listnode
*node
;
2109 struct isis_circuit
*circuit
;
2116 struct list
*circuit_list
= lsp
->area
->circuit_list
;
2117 for (ALL_LIST_ELEMENTS_RO(circuit_list
, node
, circuit
)) {
2119 isis_tx_queue_add(circuit
->tx_queue
, lsp
,
2122 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
2127 void _lsp_flood(struct isis_lsp
*lsp
, struct isis_circuit
*circuit
,
2128 const char *func
, const char *file
, int line
)
2130 if (IS_DEBUG_FLOODING
) {
2131 zlog_debug("Flooding LSP %s%s%s (From %s %s:%d)",
2132 rawlspid_print(lsp
->hdr
.lsp_id
),
2133 circuit
? " except on " : "",
2134 circuit
? circuit
->interface
->name
: "",
2139 lsp_set_all_srmflags(lsp
, true);
2141 fabricd_lsp_flood(lsp
, circuit
);
2144 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
2147 static int lsp_handle_adj_state_change(struct isis_adjacency
*adj
)
2149 lsp_regenerate_schedule(adj
->circuit
->area
, IS_LEVEL_1
| IS_LEVEL_2
, 0);
2151 /* when an adjacency state changes determine if we need to
2152 * change attach_bits in other area's LSPs
2154 isis_reset_attach_bit(adj
);
2160 * Iterate over all IP reachability TLVs in a LSP (all fragments) of the given
2161 * address-family and MT-ID.
2163 int isis_lsp_iterate_ip_reach(struct isis_lsp
*lsp
, int family
, uint16_t mtid
,
2164 lsp_ip_reach_iter_cb cb
, void *arg
)
2166 bool pseudo_lsp
= LSP_PSEUDO_ID(lsp
->hdr
.lsp_id
);
2167 struct isis_lsp
*frag
;
2168 struct listnode
*node
;
2170 if (lsp
->hdr
.seqno
== 0 || lsp
->hdr
.rem_lifetime
== 0)
2171 return LSP_ITER_CONTINUE
;
2173 /* Parse main LSP. */
2175 if (!fabricd
&& !pseudo_lsp
&& family
== AF_INET
2176 && mtid
== ISIS_MT_IPV4_UNICAST
) {
2177 struct isis_item_list
*reachs
[] = {
2178 &lsp
->tlvs
->oldstyle_ip_reach
,
2179 &lsp
->tlvs
->oldstyle_ip_reach_ext
};
2181 for (unsigned int i
= 0; i
< array_size(reachs
); i
++) {
2182 struct isis_oldstyle_ip_reach
*r
;
2184 for (r
= (struct isis_oldstyle_ip_reach
*)
2188 bool external
= i
? true : false;
2190 if ((*cb
)((struct prefix
*)&r
->prefix
,
2191 r
->metric
, external
, NULL
,
2194 return LSP_ITER_STOP
;
2199 if (!pseudo_lsp
&& family
== AF_INET
) {
2200 struct isis_item_list
*ipv4_reachs
;
2202 if (mtid
== ISIS_MT_IPV4_UNICAST
)
2203 ipv4_reachs
= &lsp
->tlvs
->extended_ip_reach
;
2205 ipv4_reachs
= isis_lookup_mt_items(
2206 &lsp
->tlvs
->mt_ip_reach
, mtid
);
2208 struct isis_extended_ip_reach
*r
;
2209 for (r
= ipv4_reachs
? (struct isis_extended_ip_reach
*)
2213 if ((*cb
)((struct prefix
*)&r
->prefix
,
2214 r
->metric
, false, r
->subtlvs
, arg
)
2216 return LSP_ITER_STOP
;
2220 if (!pseudo_lsp
&& family
== AF_INET6
) {
2221 struct isis_item_list
*ipv6_reachs
;
2222 struct isis_ipv6_reach
*r
;
2224 if (mtid
== ISIS_MT_IPV4_UNICAST
)
2225 ipv6_reachs
= &lsp
->tlvs
->ipv6_reach
;
2227 ipv6_reachs
= isis_lookup_mt_items(
2228 &lsp
->tlvs
->mt_ipv6_reach
, mtid
);
2230 for (r
= ipv6_reachs
? (struct isis_ipv6_reach
*)
2234 if ((*cb
)((struct prefix
*)&r
->prefix
,
2235 r
->metric
, r
->external
, r
->subtlvs
,
2238 return LSP_ITER_STOP
;
2243 /* Parse LSP fragments. */
2244 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
)) {
2248 isis_lsp_iterate_ip_reach(frag
, family
, mtid
, cb
, arg
);
2251 return LSP_ITER_CONTINUE
;
2255 * Iterate over all IS reachability TLVs in a LSP (all fragments) of the given
2258 int isis_lsp_iterate_is_reach(struct isis_lsp
*lsp
, uint16_t mtid
,
2259 lsp_is_reach_iter_cb cb
, void *arg
)
2261 bool pseudo_lsp
= LSP_PSEUDO_ID(lsp
->hdr
.lsp_id
);
2262 struct isis_lsp
*frag
;
2263 struct listnode
*node
;
2264 struct isis_item
*head
;
2265 struct isis_item_list
*te_neighs
;
2267 if (lsp
->hdr
.seqno
== 0 || lsp
->hdr
.rem_lifetime
== 0)
2268 return LSP_ITER_CONTINUE
;
2270 /* Parse main LSP. */
2272 if (pseudo_lsp
|| mtid
== ISIS_MT_IPV4_UNICAST
) {
2273 head
= lsp
->tlvs
->oldstyle_reach
.head
;
2274 for (struct isis_oldstyle_reach
*reach
=
2275 (struct isis_oldstyle_reach
*)head
;
2276 reach
; reach
= reach
->next
) {
2277 if ((*cb
)(reach
->id
, reach
->metric
, true, NULL
,
2280 return LSP_ITER_STOP
;
2284 if (pseudo_lsp
|| mtid
== ISIS_MT_IPV4_UNICAST
)
2285 te_neighs
= &lsp
->tlvs
->extended_reach
;
2288 isis_get_mt_items(&lsp
->tlvs
->mt_reach
, mtid
);
2290 head
= te_neighs
->head
;
2291 for (struct isis_extended_reach
*reach
=
2292 (struct isis_extended_reach
*)head
;
2293 reach
; reach
= reach
->next
) {
2294 if ((*cb
)(reach
->id
, reach
->metric
, false,
2295 reach
->subtlvs
, arg
)
2297 return LSP_ITER_STOP
;
2302 /* Parse LSP fragments. */
2303 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
)) {
2307 isis_lsp_iterate_is_reach(frag
, mtid
, cb
, arg
);
2310 return LSP_ITER_CONTINUE
;
2315 hook_register(isis_adj_state_change_hook
,
2316 lsp_handle_adj_state_change
);