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 void lsp_refresh(struct thread
*thread
);
66 static void lsp_l1_refresh_pseudo(struct thread
*thread
);
67 static void 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
);
127 isis_te_lsp_event(lsp
, LSP_DEL
);
131 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
)) {
132 if (lsp
->lspu
.frags
) {
133 lsp_remove_frags(&lsp
->area
->lspdb
[lsp
->level
- 1],
135 list_delete(&lsp
->lspu
.frags
);
138 if (lsp
->lspu
.zero_lsp
139 && lsp
->lspu
.zero_lsp
->lspu
.frags
) {
140 listnode_delete(lsp
->lspu
.zero_lsp
->lspu
.frags
, lsp
);
144 isis_spf_schedule(lsp
->area
, lsp
->level
);
147 stream_free(lsp
->pdu
);
149 fabricd_lsp_free(lsp
);
150 XFREE(MTYPE_ISIS_LSP
, lsp
);
154 * Remove all the frags belonging to the given lsp
156 static void lsp_remove_frags(struct lspdb_head
*head
, struct list
*frags
)
158 struct listnode
*lnode
, *lnnode
;
159 struct isis_lsp
*lsp
;
161 for (ALL_LIST_ELEMENTS(frags
, lnode
, lnnode
, lsp
)) {
162 lsp
= lsp_search(head
, lsp
->hdr
.lsp_id
);
163 lspdb_del(head
, lsp
);
168 void lsp_search_and_destroy(struct lspdb_head
*head
, const uint8_t *id
)
170 struct isis_lsp
*lsp
;
172 lsp
= lsp_search(head
, id
);
174 lspdb_del(head
, lsp
);
176 * If this is a zero lsp, remove all the frags now
178 if (LSP_FRAGMENT(lsp
->hdr
.lsp_id
) == 0) {
180 lsp_remove_frags(head
, lsp
->lspu
.frags
);
183 * else just remove this frag, from the zero lsps' frag
186 if (lsp
->lspu
.zero_lsp
187 && lsp
->lspu
.zero_lsp
->lspu
.frags
)
188 listnode_delete(lsp
->lspu
.zero_lsp
->lspu
.frags
,
196 * Compares a LSP to given values
197 * Params are given in net order
199 int lsp_compare(char *areatag
, struct isis_lsp
*lsp
, uint32_t seqno
,
200 uint16_t checksum
, uint16_t rem_lifetime
)
202 if (lsp
->hdr
.seqno
== seqno
&& lsp
->hdr
.checksum
== checksum
203 && ((lsp
->hdr
.rem_lifetime
== 0 && rem_lifetime
== 0)
204 || (lsp
->hdr
.rem_lifetime
!= 0 && rem_lifetime
!= 0))) {
205 if (IS_DEBUG_SNP_PACKETS
) {
207 "ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus",
208 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
),
209 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
210 lsp
->hdr
.rem_lifetime
);
212 "ISIS-Snp (%s): is equal to ours seq 0x%08x, cksum 0x%04hx, lifetime %hus",
213 areatag
, seqno
, checksum
, rem_lifetime
);
219 * LSPs with identical checksums should only be treated as newer if:
220 * a) The current LSP has a remaining lifetime != 0 and the other LSP
222 * remaining lifetime == 0. In this case, we should participate in
224 * and should not treat the current LSP with remaining lifetime == 0
226 * b) The LSP has an incorrect checksum. In this case, we need to react
230 if (seqno
> lsp
->hdr
.seqno
231 || (seqno
== lsp
->hdr
.seqno
232 && ((lsp
->hdr
.rem_lifetime
!= 0 && rem_lifetime
== 0)
233 || (lsp
->hdr
.checksum
!= checksum
234 && lsp
->hdr
.rem_lifetime
)))) {
235 if (IS_DEBUG_SNP_PACKETS
) {
237 "ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus",
238 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
), seqno
,
239 checksum
, rem_lifetime
);
241 "ISIS-Snp (%s): is newer than ours seq 0x%08x, cksum 0x%04hx, lifetime %hus",
242 areatag
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
243 lsp
->hdr
.rem_lifetime
);
247 if (IS_DEBUG_SNP_PACKETS
) {
248 zlog_debug("ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus",
249 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
), seqno
,
250 checksum
, rem_lifetime
);
252 "ISIS-Snp (%s): is older than ours seq 0x%08x, cksum 0x%04hx, lifetime %hus",
253 areatag
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
254 lsp
->hdr
.rem_lifetime
);
260 static void put_lsp_hdr(struct isis_lsp
*lsp
, size_t *len_pointer
, bool keep
)
263 (lsp
->level
== IS_LEVEL_1
) ? L1_LINK_STATE
: L2_LINK_STATE
;
264 struct isis_lsp_hdr
*hdr
= &lsp
->hdr
;
265 struct stream
*stream
= lsp
->pdu
;
266 size_t orig_getp
= 0, orig_endp
= 0;
269 orig_getp
= stream_get_getp(lsp
->pdu
);
270 orig_endp
= stream_get_endp(lsp
->pdu
);
273 stream_set_getp(lsp
->pdu
, 0);
274 stream_set_endp(lsp
->pdu
, 0);
276 fill_fixed_hdr(pdu_type
, stream
);
279 *len_pointer
= stream_get_endp(stream
);
280 stream_putw(stream
, hdr
->pdu_len
);
281 stream_putw(stream
, hdr
->rem_lifetime
);
282 stream_put(stream
, hdr
->lsp_id
, sizeof(hdr
->lsp_id
));
283 stream_putl(stream
, hdr
->seqno
);
284 stream_putw(stream
, hdr
->checksum
);
285 stream_putc(stream
, hdr
->lsp_bits
);
288 stream_set_endp(lsp
->pdu
, orig_endp
);
289 stream_set_getp(lsp
->pdu
, orig_getp
);
293 static void lsp_add_auth(struct isis_lsp
*lsp
)
295 struct isis_passwd
*passwd
;
296 passwd
= (lsp
->level
== IS_LEVEL_1
) ? &lsp
->area
->area_passwd
297 : &lsp
->area
->domain_passwd
;
298 isis_tlvs_add_auth(lsp
->tlvs
, passwd
);
301 static void lsp_pack_pdu(struct isis_lsp
*lsp
)
304 lsp
->tlvs
= isis_alloc_tlvs();
309 put_lsp_hdr(lsp
, &len_pointer
, false);
310 isis_pack_tlvs(lsp
->tlvs
, lsp
->pdu
, len_pointer
, false, true);
312 lsp
->hdr
.pdu_len
= stream_get_endp(lsp
->pdu
);
314 ntohs(fletcher_checksum(STREAM_DATA(lsp
->pdu
) + 12,
315 stream_get_endp(lsp
->pdu
) - 12, 12));
318 void lsp_inc_seqno(struct isis_lsp
*lsp
, uint32_t seqno
)
322 if (seqno
== 0 || lsp
->hdr
.seqno
> seqno
)
323 newseq
= lsp
->hdr
.seqno
+ 1;
328 /* check for overflow */
329 if (newseq
< lsp
->hdr
.seqno
) {
330 /* send northbound notification */
331 lsp
->area
->lsp_exceeded_max_counter
++;
332 isis_notif_lsp_exceed_max(lsp
->area
, lsp
->hdr
.lsp_id
);
334 #endif /* ifndef FABRICD */
336 lsp
->hdr
.seqno
= newseq
;
339 isis_spf_schedule(lsp
->area
, lsp
->level
);
340 isis_te_lsp_event(lsp
, LSP_INC
);
343 static void lsp_purge_add_poi(struct isis_lsp
*lsp
,
344 const uint8_t *sender
)
346 if (lsp
->area
== NULL
)
349 if (!lsp
->area
->purge_originator
)
352 /* add purge originator identification */
354 lsp
->tlvs
= isis_alloc_tlvs();
355 isis_tlvs_set_purge_originator(lsp
->tlvs
, lsp
->area
->isis
->sysid
,
357 isis_tlvs_set_dynamic_hostname(lsp
->tlvs
, cmd_hostname_get());
360 static void lsp_purge(struct isis_lsp
*lsp
, int level
,
361 const uint8_t *sender
)
365 stream_reset(lsp
->pdu
);
368 lsp
->hdr
.checksum
= 0;
369 lsp
->hdr
.rem_lifetime
= 0;
371 lsp
->age_out
= lsp
->area
->max_lsp_lifetime
[level
- 1];
372 lsp
->area
->lsp_purge_count
[level
- 1]++;
374 lsp_purge_add_poi(lsp
, sender
);
377 lsp_flood(lsp
, NULL
);
381 * Generates checksum for LSP and its frags
383 static void lsp_seqno_update(struct isis_lsp
*lsp0
)
385 struct isis_lsp
*lsp
;
386 struct listnode
*node
;
388 lsp_inc_seqno(lsp0
, 0);
390 if (!lsp0
->lspu
.frags
)
393 for (ALL_LIST_ELEMENTS_RO(lsp0
->lspu
.frags
, node
, lsp
)) {
395 lsp_inc_seqno(lsp
, 0);
396 else if (lsp
->hdr
.rem_lifetime
) {
397 /* Purge should only be applied when the fragment has
398 * non-zero remaining lifetime.
400 lsp_purge(lsp
, lsp0
->level
, NULL
);
407 bool isis_level2_adj_up(struct isis_area
*area
)
409 struct listnode
*node
, *cnode
;
410 struct isis_circuit
*circuit
;
412 struct isis_adjacency
*adj
;
414 if (area
->is_type
== IS_LEVEL_1
)
417 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, cnode
, circuit
)) {
418 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
) {
419 adjdb
= circuit
->u
.bc
.adjdb
[1];
420 if (!adjdb
|| !adjdb
->count
)
423 for (ALL_LIST_ELEMENTS_RO(adjdb
, node
, adj
)) {
424 if (adj
->level
!= ISIS_ADJ_LEVEL1
425 && adj
->adj_state
== ISIS_ADJ_UP
)
428 } else if (circuit
->circ_type
== CIRCUIT_T_P2P
429 && circuit
->u
.p2p
.neighbor
) {
430 adj
= circuit
->u
.p2p
.neighbor
;
431 if (adj
->level
!= ISIS_ADJ_LEVEL1
432 && adj
->adj_state
== ISIS_ADJ_UP
)
440 static void isis_reset_attach_bit(struct isis_adjacency
*adj
)
442 struct isis_area
*area
= adj
->circuit
->area
;
443 struct lspdb_head
*head
;
444 struct isis_lsp
*lsp
;
445 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
448 * If an L2 adjacency changed its state in L-1-2 area, we have to:
449 * - set the attached bit in L1 LSPs if it's the first L2 adjacency
450 * - remove the attached bit in L1 LSPs if it's the last L2 adjacency
453 if (area
->is_type
!= IS_LEVEL_1_AND_2
|| adj
->level
== ISIS_ADJ_LEVEL1
)
456 if (!area
->attached_bit_send
)
459 head
= &area
->lspdb
[IS_LEVEL_1
- 1];
460 memset(lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
461 memcpy(lspid
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
463 lsp
= lsp_search(head
, lspid
);
467 if (adj
->adj_state
== ISIS_ADJ_UP
468 && !(lsp
->hdr
.lsp_bits
& LSPBIT_ATT
)) {
469 sched_debug("ISIS (%s): adj going up regenerate lsp-bits",
471 lsp_regenerate_schedule(area
, IS_LEVEL_1
, 0);
472 } else if (adj
->adj_state
== ISIS_ADJ_DOWN
473 && (lsp
->hdr
.lsp_bits
& LSPBIT_ATT
)
474 && !isis_level2_adj_up(area
)) {
475 sched_debug("ISIS (%s): adj going down regenerate lsp-bits",
477 lsp_regenerate_schedule(area
, IS_LEVEL_1
, 0);
481 static uint8_t lsp_bits_generate(int level
, int overload_bit
, int attached_bit
,
482 struct isis_area
*area
)
484 uint8_t lsp_bits
= 0;
485 if (area
->is_type
== IS_LEVEL_1
)
486 lsp_bits
= IS_LEVEL_1
;
488 lsp_bits
= IS_LEVEL_1_AND_2
;
490 lsp_bits
|= overload_bit
;
492 /* only set the attach bit if we are a level-1-2 router and this is
493 * a level-1 LSP and we have a level-2 adjacency up from another area
495 if (area
->is_type
== IS_LEVEL_1_AND_2
&& level
== IS_LEVEL_1
496 && attached_bit
&& isis_level2_adj_up(area
))
497 lsp_bits
|= LSPBIT_ATT
;
501 static void lsp_update_data(struct isis_lsp
*lsp
, struct isis_lsp_hdr
*hdr
,
502 struct isis_tlvs
*tlvs
, struct stream
*stream
,
503 struct isis_area
*area
, int level
)
505 /* free the old lsp data */
508 /* copying only the relevant part of our stream */
509 if (lsp
->pdu
!= NULL
)
510 stream_free(lsp
->pdu
);
511 lsp
->pdu
= stream_dup(stream
);
513 memcpy(&lsp
->hdr
, hdr
, sizeof(lsp
->hdr
));
516 lsp
->age_out
= ZERO_AGE_LIFETIME
;
517 lsp
->installed
= time(NULL
);
521 if (area
->dynhostname
&& lsp
->tlvs
->hostname
522 && lsp
->hdr
.rem_lifetime
) {
524 area
->isis
, lsp
->hdr
.lsp_id
, lsp
->tlvs
->hostname
,
525 (lsp
->hdr
.lsp_bits
& LSPBIT_IST
) == IS_LEVEL_1_AND_2
533 static void lsp_link_fragment(struct isis_lsp
*lsp
, struct isis_lsp
*lsp0
)
535 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
)) {
536 /* zero lsp -> create list to store fragments */
537 lsp
->lspu
.frags
= list_new();
539 /* fragment -> set backpointer and add to zero lsps list */
541 lsp
->lspu
.zero_lsp
= lsp0
;
542 listnode_add(lsp0
->lspu
.frags
, lsp
);
546 void lsp_update(struct isis_lsp
*lsp
, struct isis_lsp_hdr
*hdr
,
547 struct isis_tlvs
*tlvs
, struct stream
*stream
,
548 struct isis_area
*area
, int level
, bool confusion
)
553 "ISIS-Upd (%s): BUG updating LSP %s still marked as own LSP",
554 area
->area_tag
, rawlspid_print(lsp
->hdr
.lsp_id
));
560 lsp_purge(lsp
, level
, NULL
);
562 lsp_update_data(lsp
, hdr
, tlvs
, stream
, area
, level
);
565 if (LSP_FRAGMENT(lsp
->hdr
.lsp_id
) && !lsp
->lspu
.zero_lsp
) {
566 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
567 struct isis_lsp
*lsp0
;
569 memcpy(lspid
, lsp
->hdr
.lsp_id
, ISIS_SYS_ID_LEN
+ 1);
570 LSP_FRAGMENT(lspid
) = 0;
571 lsp0
= lsp_search(&area
->lspdb
[level
- 1], lspid
);
573 lsp_link_fragment(lsp
, lsp0
);
576 if (lsp
->hdr
.seqno
) {
577 isis_spf_schedule(lsp
->area
, lsp
->level
);
578 isis_te_lsp_event(lsp
, LSP_UPD
);
582 /* creation of LSP directly from what we received */
583 struct isis_lsp
*lsp_new_from_recv(struct isis_lsp_hdr
*hdr
,
584 struct isis_tlvs
*tlvs
,
585 struct stream
*stream
, struct isis_lsp
*lsp0
,
586 struct isis_area
*area
, int level
)
588 struct isis_lsp
*lsp
;
590 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
591 lsp_update_data(lsp
, hdr
, tlvs
, stream
, area
, level
);
592 lsp_link_fragment(lsp
, lsp0
);
597 static void lsp_adjust_stream(struct isis_lsp
*lsp
)
600 if (STREAM_SIZE(lsp
->pdu
) == LLC_LEN
+ lsp
->area
->lsp_mtu
)
602 stream_free(lsp
->pdu
);
605 lsp
->pdu
= stream_new(LLC_LEN
+ lsp
->area
->lsp_mtu
);
608 struct isis_lsp
*lsp_new(struct isis_area
*area
, uint8_t *lsp_id
,
609 uint16_t rem_lifetime
, uint32_t seqno
,
610 uint8_t lsp_bits
, uint16_t checksum
,
611 struct isis_lsp
*lsp0
, int level
)
613 struct isis_lsp
*lsp
;
615 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
618 lsp_adjust_stream(lsp
);
620 /* Minimal LSP PDU size */
621 lsp
->hdr
.pdu_len
= ISIS_FIXED_HDR_LEN
+ ISIS_LSP_HDR_LEN
;
622 memcpy(lsp
->hdr
.lsp_id
, lsp_id
, sizeof(lsp
->hdr
.lsp_id
));
623 lsp
->hdr
.checksum
= checksum
;
624 lsp
->hdr
.seqno
= seqno
;
625 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
626 lsp
->hdr
.lsp_bits
= lsp_bits
;
628 lsp
->age_out
= ZERO_AGE_LIFETIME
;
629 lsp_link_fragment(lsp
, lsp0
);
630 put_lsp_hdr(lsp
, NULL
, false);
633 zlog_debug("New LSP with ID %s-%02x-%02x len %d seqnum %08x",
634 sysid_print(lsp_id
), LSP_PSEUDO_ID(lsp
->hdr
.lsp_id
),
635 LSP_FRAGMENT(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
641 void lsp_insert(struct lspdb_head
*head
, struct isis_lsp
*lsp
)
643 lspdb_add(head
, lsp
);
644 if (lsp
->hdr
.seqno
) {
645 isis_spf_schedule(lsp
->area
, lsp
->level
);
646 isis_te_lsp_event(lsp
, LSP_ADD
);
651 * Build a list of LSPs with non-zero ht and seqno bounded by start and stop ids
653 void lsp_build_list_nonzero_ht(struct lspdb_head
*head
, const uint8_t *start_id
,
654 const uint8_t *stop_id
, struct list
*list
)
656 struct isis_lsp searchfor
;
657 struct isis_lsp
*lsp
, *start
;
659 memcpy(&searchfor
.hdr
.lsp_id
, start_id
, sizeof(searchfor
.hdr
.lsp_id
));
661 start
= lspdb_find_gteq(head
, &searchfor
);
662 frr_each_from (lspdb
, head
, lsp
, start
) {
663 if (memcmp(lsp
->hdr
.lsp_id
, stop_id
,
664 ISIS_SYS_ID_LEN
+ 2) > 0)
667 if (lsp
->hdr
.rem_lifetime
&& lsp
->hdr
.seqno
)
668 listnode_add(list
, lsp
);
672 static void lsp_set_time(struct isis_lsp
*lsp
)
676 if (lsp
->hdr
.rem_lifetime
== 0) {
677 if (lsp
->age_out
> 0)
682 lsp
->hdr
.rem_lifetime
--;
683 if (lsp
->pdu
&& stream_get_endp(lsp
->pdu
) >= 12)
684 stream_putw_at(lsp
->pdu
, 10, lsp
->hdr
.rem_lifetime
);
687 void lspid_print(uint8_t *lsp_id
, char *dest
, size_t dest_len
, char dynhost
,
688 char frag
, struct isis
*isis
)
690 struct isis_dynhn
*dyn
= NULL
;
691 char id
[SYSID_STRLEN
];
694 dyn
= dynhn_find_by_id(isis
, lsp_id
);
699 snprintf(id
, sizeof(id
), "%.14s", dyn
->hostname
);
700 else if (!memcmp(isis
->sysid
, lsp_id
, ISIS_SYS_ID_LEN
) && dynhost
)
701 snprintf(id
, sizeof(id
), "%.14s", cmd_hostname_get());
703 memcpy(id
, sysid_print(lsp_id
), 15);
706 snprintf(dest
, dest_len
, "%s.%02x-%02x", id
,
707 LSP_PSEUDO_ID(lsp_id
), LSP_FRAGMENT(lsp_id
));
709 snprintf(dest
, dest_len
, "%s.%02x", id
, LSP_PSEUDO_ID(lsp_id
));
712 /* Convert the lsp attribute bits to attribute string */
713 static const char *lsp_bits2string(uint8_t lsp_bits
, char *buf
, size_t buf_size
)
720 if (buf_size
< 2 * 3)
723 /* we only focus on the default metric */
724 pos
+= snprintf(pos
, buf_size
, "%d/",
725 ISIS_MASK_LSP_ATT_BITS(lsp_bits
) ? 1 : 0);
727 pos
+= snprintf(pos
, buf_size
, "%d/",
728 ISIS_MASK_LSP_PARTITION_BIT(lsp_bits
) ? 1 : 0);
730 snprintf(pos
, buf_size
, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits
) ? 1 : 0);
735 /* this function prints the lsp on show isis database */
736 void lsp_print_common(struct isis_lsp
*lsp
, struct vty
*vty
, struct json_object
*json
,
737 char dynhost
, struct isis
*isis
)
740 return lsp_print_json(lsp
, json
, dynhost
, isis
);
742 return lsp_print_vty(lsp
, vty
, dynhost
, isis
);
746 void lsp_print_json(struct isis_lsp
*lsp
, struct json_object
*json
,
747 char dynhost
, struct isis
*isis
)
752 json_object
*own_json
;
755 lspid_print(lsp
->hdr
.lsp_id
, LSPid
, sizeof(LSPid
), dynhost
, 1, isis
);
756 own_json
= json_object_new_object();
757 json_object_object_add(json
, "lsp", own_json
);
758 json_object_string_add(own_json
, "id", LSPid
);
759 json_object_string_add(own_json
, "own", lsp
->own_lsp
? "*" : " ");
760 json_object_int_add(json
, "pdu-len", lsp
->hdr
.pdu_len
);
761 snprintfrr(buf
, sizeof(buf
), "0x%08x", lsp
->hdr
.seqno
);
762 json_object_string_add(json
, "seq-number", buf
);
763 snprintfrr(buf
, sizeof(buf
), "0x%04hx", lsp
->hdr
.checksum
);
764 json_object_string_add(json
, "chksum", buf
);
765 if (lsp
->hdr
.rem_lifetime
== 0) {
766 snprintf(age_out
, sizeof(age_out
), "(%d)", lsp
->age_out
);
768 json_object_string_add(json
, "holdtime", age_out
);
770 json_object_int_add(json
, "holdtime", lsp
->hdr
.rem_lifetime
);
772 json_object_string_add(
773 json
, "att-p-ol", lsp_bits2string(lsp
->hdr
.lsp_bits
, b
, sizeof(b
)));
776 void lsp_print_vty(struct isis_lsp
*lsp
, struct vty
*vty
,
777 char dynhost
, struct isis
*isis
)
783 lspid_print(lsp
->hdr
.lsp_id
, LSPid
, sizeof(LSPid
), dynhost
, 1, isis
);
784 vty_out(vty
, "%-21s%c ", LSPid
, lsp
->own_lsp
? '*' : ' ');
785 vty_out(vty
, "%5hu ", lsp
->hdr
.pdu_len
);
786 vty_out(vty
, "0x%08x ", lsp
->hdr
.seqno
);
787 vty_out(vty
, "0x%04hx ", lsp
->hdr
.checksum
);
788 if (lsp
->hdr
.rem_lifetime
== 0) {
789 snprintf(age_out
, sizeof(age_out
), "(%d)", lsp
->age_out
);
791 vty_out(vty
, "%7s ", age_out
);
793 vty_out(vty
, " %5hu ", lsp
->hdr
.rem_lifetime
);
794 vty_out(vty
, "%s\n", lsp_bits2string(lsp
->hdr
.lsp_bits
, b
, sizeof(b
)));
797 void lsp_print_detail(struct isis_lsp
*lsp
, struct vty
*vty
,
798 struct json_object
*json
, char dynhost
,
802 lsp_print_json(lsp
, json
, dynhost
, isis
);
804 isis_format_tlvs(lsp
->tlvs
, json
);
807 lsp_print_vty(lsp
, vty
, dynhost
, isis
);
809 vty_multiline(vty
, " ", "%s",
810 isis_format_tlvs(lsp
->tlvs
, NULL
));
815 /* print all the lsps info in the local lspdb */
816 int lsp_print_all(struct vty
*vty
, struct json_object
*json
,
817 struct lspdb_head
*head
, char detail
, char dynhost
,
820 struct isis_lsp
*lsp
;
823 if (detail
== ISIS_UI_LEVEL_BRIEF
) {
824 frr_each (lspdb
, head
, lsp
) {
825 lsp_print_common(lsp
, vty
, json
, dynhost
, isis
);
828 } else if (detail
== ISIS_UI_LEVEL_DETAIL
) {
829 frr_each (lspdb
, head
, lsp
) {
830 lsp_print_detail(lsp
, vty
, json
, dynhost
, isis
);
838 static uint16_t lsp_rem_lifetime(struct isis_area
*area
, int level
)
840 uint16_t rem_lifetime
;
842 /* Add jitter to configured LSP lifetime */
844 isis_jitter(area
->max_lsp_lifetime
[level
- 1], MAX_AGE_JITTER
);
846 /* No jitter if the max refresh will be less than configure gen interval
848 /* N.B. this calucation is acceptable since rem_lifetime is in
851 if (area
->lsp_gen_interval
[level
- 1] > (rem_lifetime
- 300))
852 rem_lifetime
= area
->max_lsp_lifetime
[level
- 1];
857 static uint16_t lsp_refresh_time(struct isis_lsp
*lsp
, uint16_t rem_lifetime
)
859 struct isis_area
*area
= lsp
->area
;
860 int level
= lsp
->level
;
861 uint16_t refresh_time
;
863 /* Add jitter to LSP refresh time */
865 isis_jitter(area
->lsp_refresh
[level
- 1], MAX_LSP_GEN_JITTER
);
867 /* RFC 4444 : make sure the refresh time is at least less than 300
868 * of the remaining lifetime and more than gen interval */
869 if (refresh_time
<= area
->lsp_gen_interval
[level
- 1]
870 || refresh_time
> (rem_lifetime
- 300))
871 refresh_time
= rem_lifetime
- 300;
873 /* In cornercases, refresh_time might be <= lsp_gen_interval, however
874 * we accept this violation to satisfy refresh_time <= rem_lifetime -
880 static void lsp_build_ext_reach_ipv4(struct isis_lsp
*lsp
,
881 struct isis_area
*area
)
883 struct route_table
*er_table
= get_ext_reach(area
, AF_INET
, lsp
->level
);
887 for (struct route_node
*rn
= route_top(er_table
); rn
;
888 rn
= route_next(rn
)) {
892 struct prefix_ipv4
*ipv4
= (struct prefix_ipv4
*)&rn
->p
;
893 struct isis_ext_info
*info
= rn
->info
;
895 uint32_t metric
= info
->metric
;
896 if (metric
> MAX_WIDE_PATH_METRIC
)
897 metric
= MAX_WIDE_PATH_METRIC
;
898 if (area
->oldmetric
&& metric
> 0x3f)
902 isis_tlvs_add_oldstyle_ip_reach(lsp
->tlvs
, ipv4
,
904 if (area
->newmetric
) {
905 struct sr_prefix_cfg
*pcfg
= NULL
;
907 if (area
->srdb
.enabled
)
908 pcfg
= isis_sr_cfg_prefix_find(area
, ipv4
);
910 isis_tlvs_add_extended_ip_reach(lsp
->tlvs
, ipv4
, metric
,
916 static void lsp_build_ext_reach_ipv6(struct isis_lsp
*lsp
,
917 struct isis_area
*area
)
919 struct route_table
*er_table
=
920 get_ext_reach(area
, AF_INET6
, lsp
->level
);
924 for (struct route_node
*rn
= route_top(er_table
); rn
;
925 rn
= srcdest_route_next(rn
)) {
928 struct isis_ext_info
*info
= rn
->info
;
929 struct prefix_ipv6
*p
, *src_p
;
931 srcdest_rnode_prefixes(rn
, (const struct prefix
**)&p
,
932 (const struct prefix
**)&src_p
);
934 uint32_t metric
= info
->metric
;
935 if (info
->metric
> MAX_WIDE_PATH_METRIC
)
936 metric
= MAX_WIDE_PATH_METRIC
;
938 if (!src_p
|| !src_p
->prefixlen
) {
939 struct sr_prefix_cfg
*pcfg
= NULL
;
941 if (area
->srdb
.enabled
)
942 pcfg
= isis_sr_cfg_prefix_find(area
, p
);
944 isis_tlvs_add_ipv6_reach(lsp
->tlvs
,
945 isis_area_ipv6_topology(area
),
946 p
, metric
, true, pcfg
);
947 } else if (isis_area_ipv6_dstsrc_enabled(area
)) {
948 isis_tlvs_add_ipv6_dstsrc_reach(lsp
->tlvs
,
955 static void lsp_build_ext_reach(struct isis_lsp
*lsp
, struct isis_area
*area
)
957 lsp_build_ext_reach_ipv4(lsp
, area
);
958 lsp_build_ext_reach_ipv6(lsp
, area
);
961 static struct isis_lsp
*lsp_next_frag(uint8_t frag_num
, struct isis_lsp
*lsp0
,
962 struct isis_area
*area
, int level
)
964 struct isis_lsp
*lsp
;
965 uint8_t frag_id
[ISIS_SYS_ID_LEN
+ 2];
967 memcpy(frag_id
, lsp0
->hdr
.lsp_id
, ISIS_SYS_ID_LEN
+ 1);
968 LSP_FRAGMENT(frag_id
) = frag_num
;
970 lsp
= lsp_search(&area
->lspdb
[level
- 1], frag_id
);
973 if (!lsp
->lspu
.zero_lsp
)
974 lsp_link_fragment(lsp
, lsp0
);
978 lsp
= lsp_new(area
, frag_id
, lsp0
->hdr
.rem_lifetime
, 0,
979 lsp_bits_generate(level
, area
->overload_bit
,
980 area
->attached_bit_send
, area
),
983 lsp_insert(&area
->lspdb
[level
- 1], lsp
);
988 * Builds the LSP data part. This func creates a new frag whenever
989 * area->lsp_frag_threshold is exceeded.
991 static void lsp_build(struct isis_lsp
*lsp
, struct isis_area
*area
)
993 int level
= lsp
->level
;
994 struct listnode
*node
;
995 struct isis_lsp
*frag
;
998 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
))
999 lsp_clear_data(frag
);
1001 lsp
->tlvs
= isis_alloc_tlvs();
1002 lsp_debug("ISIS (%s): Constructing local system LSP for level %d",
1003 area
->area_tag
, level
);
1005 lsp
->hdr
.lsp_bits
= lsp_bits_generate(level
, area
->overload_bit
,
1006 area
->attached_bit_send
, area
);
1010 isis_tlvs_add_area_addresses(lsp
->tlvs
, area
->area_addrs
);
1012 /* Protocols Supported */
1013 if (area
->ip_circuits
> 0 || area
->ipv6_circuits
> 0) {
1014 struct nlpids nlpids
= {.count
= 0};
1016 if (area
->ip_circuits
> 0) {
1018 "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs",
1020 nlpids
.nlpids
[nlpids
.count
] = NLPID_IP
;
1023 if (area
->ipv6_circuits
> 0) {
1025 "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs",
1027 nlpids
.nlpids
[nlpids
.count
] = NLPID_IPV6
;
1030 isis_tlvs_set_protocols_supported(lsp
->tlvs
, &nlpids
);
1033 if (area_is_mt(area
)) {
1034 lsp_debug("ISIS (%s): Adding MT router tlv...", area
->area_tag
);
1036 struct isis_area_mt_setting
**mt_settings
;
1037 unsigned int mt_count
;
1039 mt_settings
= area_mt_settings(area
, &mt_count
);
1040 for (unsigned int i
= 0; i
< mt_count
; i
++) {
1041 isis_tlvs_add_mt_router_info(
1042 lsp
->tlvs
, mt_settings
[i
]->mtid
,
1043 mt_settings
[i
]->overload
, false);
1044 lsp_debug("ISIS (%s): MT %s", area
->area_tag
,
1045 isis_mtid2str(mt_settings
[i
]->mtid
));
1048 lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)",
1051 /* Dynamic Hostname */
1052 if (area
->dynhostname
) {
1053 isis_tlvs_set_dynamic_hostname(lsp
->tlvs
, cmd_hostname_get());
1054 lsp_debug("ISIS (%s): Adding dynamic hostname '%s'",
1055 area
->area_tag
, cmd_hostname_get());
1057 lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)",
1061 /* Add Router Capability TLV. */
1062 if (area
->isis
->router_id
!= 0) {
1063 struct isis_router_cap cap
= {};
1065 cap
.router_id
.s_addr
= area
->isis
->router_id
;
1067 /* Add SR Sub-TLVs if SR is enabled. */
1068 if (area
->srdb
.enabled
) {
1069 struct isis_sr_db
*srdb
= &area
->srdb
;
1070 uint32_t range_size
;
1073 range_size
= srdb
->config
.srgb_upper_bound
1074 - srdb
->config
.srgb_lower_bound
+ 1;
1075 cap
.srgb
.flags
= ISIS_SUBTLV_SRGB_FLAG_I
1076 | ISIS_SUBTLV_SRGB_FLAG_V
;
1077 cap
.srgb
.range_size
= range_size
;
1078 cap
.srgb
.lower_bound
= srdb
->config
.srgb_lower_bound
;
1079 /* Then Algorithm */
1080 cap
.algo
[0] = SR_ALGORITHM_SPF
;
1081 cap
.algo
[1] = SR_ALGORITHM_UNSET
;
1084 range_size
= srdb
->config
.srlb_upper_bound
1085 - srdb
->config
.srlb_lower_bound
+ 1;
1086 cap
.srlb
.range_size
= range_size
;
1087 cap
.srlb
.lower_bound
= srdb
->config
.srlb_lower_bound
;
1088 /* And finally MSD */
1089 cap
.msd
= srdb
->config
.msd
;
1091 /* Disable SR Algorithm */
1092 cap
.algo
[0] = SR_ALGORITHM_UNSET
;
1093 cap
.algo
[1] = SR_ALGORITHM_UNSET
;
1096 isis_tlvs_set_router_capability(lsp
->tlvs
, &cap
);
1097 lsp_debug("ISIS (%s): Adding Router Capabilities information",
1101 /* IPv4 address and TE router ID TLVs.
1102 * In case of the first one we don't follow "C" vendor,
1103 * but "J" vendor behavior - one IPv4 address is put
1104 * into LSP. TE router ID will be the same if MPLS-TE
1105 * is not activate or MPLS-TE router-id not specified
1107 if (area
->isis
->router_id
!= 0) {
1108 struct in_addr id
= {.s_addr
= area
->isis
->router_id
};
1109 lsp_debug("ISIS (%s): Adding router ID %pI4 as IPv4 tlv.",
1110 area
->area_tag
, &id
);
1111 isis_tlvs_add_ipv4_address(lsp
->tlvs
, &id
);
1113 /* If new style TLV's are in use, add TE router ID TLV
1114 * Check if MPLS-TE is activate and mpls-te router-id set
1115 * otherwise add exactly same data as for IPv4 address
1117 if (area
->newmetric
) {
1118 if (IS_MPLS_TE(area
->mta
)
1119 && area
->mta
->router_id
.s_addr
!= INADDR_ANY
)
1120 id
.s_addr
= area
->mta
->router_id
.s_addr
;
1122 "ISIS (%s): Adding router ID also as TE router ID tlv.",
1124 isis_tlvs_set_te_router_id(lsp
->tlvs
, &id
);
1127 lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.",
1131 if (IS_MPLS_TE(area
->mta
)
1132 && !IN6_IS_ADDR_UNSPECIFIED(&area
->mta
->router_id_ipv6
)) {
1133 lsp_debug("ISIS (%s): Adding IPv6 TE Router ID tlv.",
1135 isis_tlvs_set_te_router_id_ipv6(lsp
->tlvs
,
1136 &area
->mta
->router_id_ipv6
);
1139 lsp_debug("ISIS (%s): Adding circuit specific information.",
1144 "ISIS (%s): Adding tier %hhu spine-leaf-extension tlv.",
1145 area
->area_tag
, fabricd_tier(area
));
1146 isis_tlvs_add_spine_leaf(lsp
->tlvs
, fabricd_tier(area
), true,
1147 false, false, false);
1150 struct isis_circuit
*circuit
;
1151 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, node
, circuit
)) {
1152 if (!circuit
->interface
)
1154 "ISIS (%s): Processing %s circuit %p with unknown interface",
1156 circuit_type2string(circuit
->circ_type
),
1159 lsp_debug("ISIS (%s): Processing %s circuit %s",
1161 circuit_type2string(circuit
->circ_type
),
1162 circuit
->interface
->name
);
1164 if (circuit
->state
!= C_STATE_UP
) {
1165 lsp_debug("ISIS (%s): Circuit is not up, ignoring.",
1170 uint32_t metric
= area
->oldmetric
1171 ? circuit
->metric
[level
- 1]
1172 : circuit
->te_metric
[level
- 1];
1174 if (circuit
->ip_router
&& circuit
->ip_addrs
1175 && circuit
->ip_addrs
->count
> 0) {
1177 "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.",
1179 struct listnode
*ipnode
;
1180 struct prefix_ipv4
*ipv4
;
1181 for (ALL_LIST_ELEMENTS_RO(circuit
->ip_addrs
, ipnode
,
1183 if (area
->oldmetric
) {
1185 "ISIS (%s): Adding old-style IP reachability for %pFX",
1186 area
->area_tag
, ipv4
);
1187 isis_tlvs_add_oldstyle_ip_reach(
1188 lsp
->tlvs
, ipv4
, metric
);
1191 if (area
->newmetric
) {
1192 struct sr_prefix_cfg
*pcfg
= NULL
;
1195 "ISIS (%s): Adding te-style IP reachability for %pFX",
1196 area
->area_tag
, ipv4
);
1198 if (area
->srdb
.enabled
)
1199 pcfg
= isis_sr_cfg_prefix_find(
1202 isis_tlvs_add_extended_ip_reach(
1203 lsp
->tlvs
, ipv4
, metric
, false,
1209 if (circuit
->ipv6_router
&& circuit
->ipv6_non_link
1210 && circuit
->ipv6_non_link
->count
> 0) {
1211 struct listnode
*ipnode
;
1212 struct prefix_ipv6
*ipv6
;
1214 for (ALL_LIST_ELEMENTS_RO(circuit
->ipv6_non_link
,
1216 struct sr_prefix_cfg
*pcfg
= NULL
;
1219 "ISIS (%s): Adding IPv6 reachability for %pFX",
1220 area
->area_tag
, ipv6
);
1222 if (area
->srdb
.enabled
)
1223 pcfg
= isis_sr_cfg_prefix_find(area
,
1226 isis_tlvs_add_ipv6_reach(
1228 isis_area_ipv6_topology(area
), ipv6
,
1229 metric
, false, pcfg
);
1233 switch (circuit
->circ_type
) {
1234 case CIRCUIT_T_BROADCAST
:
1235 if (level
& circuit
->is_type
) {
1237 (level
== IS_LEVEL_1
)
1238 ? circuit
->u
.bc
.l1_desig_is
1239 : circuit
->u
.bc
.l2_desig_is
;
1241 if (LSP_PSEUDO_ID(ne_id
)) {
1242 if (area
->oldmetric
) {
1244 "ISIS (%s): Adding DIS %s.%02x as old-style neighbor",
1247 LSP_PSEUDO_ID(ne_id
));
1248 isis_tlvs_add_oldstyle_reach(
1252 if (area
->newmetric
)
1255 level
, ne_id
, metric
);
1259 "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors",
1263 case CIRCUIT_T_P2P
: {
1264 struct isis_adjacency
*nei
= circuit
->u
.p2p
.neighbor
;
1265 if (nei
&& nei
->adj_state
== ISIS_ADJ_UP
1266 && (level
& nei
->circuit_t
)) {
1268 memcpy(ne_id
, nei
->sysid
, ISIS_SYS_ID_LEN
);
1269 LSP_PSEUDO_ID(ne_id
) = 0;
1271 if (area
->oldmetric
) {
1273 "ISIS (%s): Adding old-style is reach for %s",
1275 sysid_print(ne_id
));
1276 isis_tlvs_add_oldstyle_reach(
1277 lsp
->tlvs
, ne_id
, metric
);
1279 if (area
->newmetric
) {
1280 uint32_t neighbor_metric
;
1281 if (fabricd_tier(area
) == 0) {
1282 neighbor_metric
= 0xffe;
1284 neighbor_metric
= metric
;
1287 tlvs_add_mt_p2p(lsp
->tlvs
, circuit
,
1288 ne_id
, neighbor_metric
);
1292 "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors",
1296 case CIRCUIT_T_LOOPBACK
:
1299 zlog_warn("lsp_area_create: unknown circuit type");
1303 lsp_build_ext_reach(lsp
, area
);
1305 struct isis_tlvs
*tlvs
= lsp
->tlvs
;
1308 lsp_adjust_stream(lsp
);
1310 size_t tlv_space
= STREAM_WRITEABLE(lsp
->pdu
) - LLC_LEN
;
1311 lsp_clear_data(lsp
);
1313 struct list
*fragments
= isis_fragment_tlvs(tlvs
, tlv_space
);
1315 zlog_warn("BUG: could not fragment own LSP:");
1316 log_multiline(LOG_WARNING
, " ", "%s",
1317 isis_format_tlvs(tlvs
, NULL
));
1318 isis_free_tlvs(tlvs
);
1321 isis_free_tlvs(tlvs
);
1323 bool fragment_overflow
= false;
1325 for (ALL_LIST_ELEMENTS_RO(fragments
, node
, tlvs
)) {
1326 if (node
!= listhead(fragments
)) {
1327 if (LSP_FRAGMENT(frag
->hdr
.lsp_id
) == 255) {
1328 if (!fragment_overflow
) {
1329 fragment_overflow
= true;
1331 "ISIS (%s): Too much information for 256 fragments",
1334 isis_free_tlvs(tlvs
);
1338 frag
= lsp_next_frag(LSP_FRAGMENT(frag
->hdr
.lsp_id
) + 1,
1340 lsp_adjust_stream(frag
);
1345 list_delete(&fragments
);
1346 lsp_debug("ISIS (%s): LSP construction is complete. Serializing...",
1352 * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs
1354 int lsp_generate(struct isis_area
*area
, int level
)
1356 struct isis_lsp
*oldlsp
, *newlsp
;
1357 uint32_t seq_num
= 0;
1358 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
1359 uint16_t rem_lifetime
, refresh_time
;
1361 if ((area
== NULL
) || (area
->is_type
& level
) != level
)
1364 memset(&lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
1366 memcpy(&lspid
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1368 /* only builds the lsp if the area shares the level */
1369 oldlsp
= lsp_search(&area
->lspdb
[level
- 1], lspid
);
1371 /* FIXME: we should actually initiate a purge */
1372 seq_num
= oldlsp
->hdr
.seqno
;
1373 lsp_search_and_destroy(&area
->lspdb
[level
- 1],
1374 oldlsp
->hdr
.lsp_id
);
1376 rem_lifetime
= lsp_rem_lifetime(area
, level
);
1377 newlsp
= lsp_new(area
, lspid
, rem_lifetime
, seq_num
,
1378 lsp_bits_generate(area
->is_type
, area
->overload_bit
,
1379 area
->attached_bit_send
, area
),
1381 newlsp
->area
= area
;
1382 newlsp
->own_lsp
= 1;
1384 lsp_insert(&area
->lspdb
[level
- 1], newlsp
);
1385 /* build_lsp_data (newlsp, area); */
1386 lsp_build(newlsp
, area
);
1387 /* time to calculate our checksum */
1388 lsp_seqno_update(newlsp
);
1389 newlsp
->last_generated
= time(NULL
);
1390 lsp_flood(newlsp
, NULL
);
1391 area
->lsp_gen_count
[level
- 1]++;
1393 refresh_time
= lsp_refresh_time(newlsp
, rem_lifetime
);
1395 thread_cancel(&area
->t_lsp_refresh
[level
- 1]);
1396 area
->lsp_regenerate_pending
[level
- 1] = 0;
1397 thread_add_timer(master
, lsp_refresh
,
1398 &area
->lsp_refresh_arg
[level
- 1], refresh_time
,
1399 &area
->t_lsp_refresh
[level
- 1]);
1401 if (IS_DEBUG_UPDATE_PACKETS
) {
1402 zlog_debug("ISIS-Upd (%s): Building L%d LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus refresh %hus",
1403 area
->area_tag
, level
,
1404 rawlspid_print(newlsp
->hdr
.lsp_id
),
1405 newlsp
->hdr
.pdu_len
, newlsp
->hdr
.seqno
,
1406 newlsp
->hdr
.checksum
, newlsp
->hdr
.rem_lifetime
,
1410 "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.",
1411 area
->area_tag
, level
);
1414 /* send northbound notification */
1415 isis_notif_lsp_gen(area
, newlsp
->hdr
.lsp_id
, newlsp
->hdr
.seqno
,
1416 newlsp
->last_generated
);
1417 #endif /* ifndef FABRICD */
1423 * Search own LSPs, update holding time and flood
1425 static int lsp_regenerate(struct isis_area
*area
, int level
)
1427 struct lspdb_head
*head
;
1428 struct isis_lsp
*lsp
, *frag
;
1429 struct listnode
*node
;
1430 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
1431 uint16_t rem_lifetime
, refresh_time
;
1433 if ((area
== NULL
) || (area
->is_type
& level
) != level
)
1436 head
= &area
->lspdb
[level
- 1];
1437 memset(lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
1438 memcpy(lspid
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1440 lsp
= lsp_search(head
, lspid
);
1443 flog_err(EC_LIB_DEVELOPMENT
,
1444 "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!",
1445 area
->area_tag
, level
);
1449 lsp_clear_data(lsp
);
1450 lsp_build(lsp
, area
);
1451 rem_lifetime
= lsp_rem_lifetime(area
, level
);
1452 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
1453 lsp
->last_generated
= time(NULL
);
1454 lsp_flood(lsp
, NULL
);
1455 area
->lsp_gen_count
[level
- 1]++;
1456 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
)) {
1458 /* Updating and flooding should only affect fragments
1464 frag
->hdr
.lsp_bits
=
1465 lsp_bits_generate(level
, area
->overload_bit
,
1466 area
->attached_bit_send
, area
);
1467 /* Set the lifetime values of all the fragments to the same
1469 * so that no fragment expires before the lsp is refreshed.
1471 frag
->hdr
.rem_lifetime
= rem_lifetime
;
1472 frag
->age_out
= ZERO_AGE_LIFETIME
;
1473 lsp_flood(frag
, NULL
);
1475 lsp_seqno_update(lsp
);
1477 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1478 thread_add_timer(master
, lsp_refresh
,
1479 &area
->lsp_refresh_arg
[level
- 1], refresh_time
,
1480 &area
->t_lsp_refresh
[level
- 1]);
1481 area
->lsp_regenerate_pending
[level
- 1] = 0;
1483 if (IS_DEBUG_UPDATE_PACKETS
) {
1485 "ISIS-Upd (%s): Refreshed our L%d LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus refresh %hus",
1486 area
->area_tag
, level
, rawlspid_print(lsp
->hdr
.lsp_id
),
1487 lsp
->hdr
.pdu_len
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1488 lsp
->hdr
.rem_lifetime
, refresh_time
);
1491 "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.",
1492 area
->area_tag
, level
);
1498 * Something has changed or periodic refresh -> regenerate LSP
1500 static void lsp_refresh(struct thread
*thread
)
1502 struct lsp_refresh_arg
*arg
= THREAD_ARG(thread
);
1506 struct isis_area
*area
= arg
->area
;
1510 int level
= arg
->level
;
1512 area
->t_lsp_refresh
[level
- 1] = NULL
;
1513 area
->lsp_regenerate_pending
[level
- 1] = 0;
1515 if ((area
->is_type
& level
) == 0)
1519 * Throttle regeneration of LSPs (but not when BFD signalled a 'down'
1522 if (monotime_since(&area
->last_lsp_refresh_event
[level
- 1], NULL
)
1524 && !(area
->bfd_force_spf_refresh
)) {
1525 sched_debug("ISIS (%s): Still unstable, postpone LSP L%d refresh",
1526 area
->area_tag
, level
);
1527 _lsp_regenerate_schedule(area
, level
, 0, false,
1528 __func__
, __FILE__
, __LINE__
);
1533 "ISIS (%s): LSP L%d refresh timer expired. Refreshing LSP...",
1534 area
->area_tag
, level
);
1535 lsp_regenerate(area
, level
);
1538 int _lsp_regenerate_schedule(struct isis_area
*area
, int level
,
1539 int all_pseudo
, bool postpone
,
1540 const char *func
, const char *file
,
1543 struct isis_lsp
*lsp
;
1544 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1547 struct listnode
*cnode
;
1548 struct isis_circuit
*circuit
;
1555 "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs Caller: %s %s:%d",
1556 area
->area_tag
, circuit_t2string(level
),
1557 all_pseudo
? "" : "not ",
1560 memcpy(id
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1561 LSP_PSEUDO_ID(id
) = LSP_FRAGMENT(id
) = 0;
1564 for (lvl
= IS_LEVEL_1
; lvl
<= IS_LEVEL_2
; lvl
++) {
1565 if (!((level
& lvl
) && (area
->is_type
& lvl
)))
1569 monotime(&area
->last_lsp_refresh_event
[lvl
- 1]);
1573 "ISIS (%s): Checking whether L%d needs to be scheduled",
1574 area
->area_tag
, lvl
);
1576 if (area
->lsp_regenerate_pending
[lvl
- 1]
1577 && !(area
->bfd_signalled_down
)) {
1579 * Note: in case of a BFD 'down' message the refresh is
1580 * scheduled once again just to be sure
1582 struct timeval remain
= thread_timer_remain(
1583 area
->t_lsp_refresh
[lvl
- 1]);
1585 "ISIS (%s): Regeneration is already pending, nothing todo. (Due in %lld.%03lld seconds)",
1586 area
->area_tag
, (long long)remain
.tv_sec
,
1587 (long long)remain
.tv_usec
/ 1000);
1591 lsp
= lsp_search(&area
->lspdb
[lvl
- 1], id
);
1594 "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.",
1600 * Throttle avoidance
1603 "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld",
1604 area
->area_tag
, (long long)lsp
->last_generated
,
1606 thread_cancel(&area
->t_lsp_refresh
[lvl
- 1]);
1607 diff
= now
- lsp
->last_generated
;
1608 if (diff
< area
->lsp_gen_interval
[lvl
- 1]
1609 && !(area
->bfd_signalled_down
)) {
1611 1000 * (area
->lsp_gen_interval
[lvl
- 1] - diff
);
1613 "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval",
1614 area
->area_tag
, timeout
);
1617 * Schedule LSP refresh ASAP
1619 if (area
->bfd_signalled_down
) {
1621 "ISIS (%s): Scheduling immediately due to BFD 'down' message.",
1623 area
->bfd_signalled_down
= false;
1624 area
->bfd_force_spf_refresh
= true;
1627 int64_t time_since_last
= monotime_since(
1628 &area
->last_lsp_refresh_event
[lvl
- 1],
1630 timeout
= time_since_last
< 100000L
1631 ? (100000L - time_since_last
)/1000
1635 "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution in %ld ms due to the instability timer.",
1636 area
->area_tag
, timeout
);
1639 "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution now.",
1644 area
->lsp_regenerate_pending
[lvl
- 1] = 1;
1645 thread_add_timer_msec(master
, lsp_refresh
,
1646 &area
->lsp_refresh_arg
[lvl
- 1],
1648 &area
->t_lsp_refresh
[lvl
- 1]);
1652 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, cnode
, circuit
))
1653 lsp_regenerate_schedule_pseudo(circuit
, level
);
1660 * Funcs for pseudonode LSPs
1664 * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs
1666 static void lsp_build_pseudo(struct isis_lsp
*lsp
, struct isis_circuit
*circuit
,
1669 struct isis_adjacency
*adj
;
1670 struct list
*adj_list
;
1671 struct listnode
*node
;
1672 struct isis_area
*area
= circuit
->area
;
1675 lsp_clear_data(lsp
);
1676 lsp
->tlvs
= isis_alloc_tlvs();
1678 "ISIS (%s): Constructing pseudo LSP %s for interface %s level %d",
1679 area
->area_tag
, rawlspid_print(lsp
->hdr
.lsp_id
),
1680 circuit
->interface
->name
, level
);
1683 /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
1684 lsp
->hdr
.lsp_bits
= lsp_bits_generate(
1685 level
, 0, circuit
->area
->attached_bit_send
, area
);
1688 * add self to IS neighbours
1690 uint8_t ne_id
[ISIS_SYS_ID_LEN
+ 1];
1692 memcpy(ne_id
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1693 LSP_PSEUDO_ID(ne_id
) = 0;
1695 if (circuit
->area
->oldmetric
) {
1696 isis_tlvs_add_oldstyle_reach(lsp
->tlvs
, ne_id
, 0);
1698 "ISIS (%s): Adding %s.%02x as old-style neighbor (self)",
1699 area
->area_tag
, sysid_print(ne_id
),
1700 LSP_PSEUDO_ID(ne_id
));
1702 if (circuit
->area
->newmetric
) {
1703 if (area_is_mt(circuit
->area
))
1704 mtid
= ISIS_MT_IPV4_UNICAST
;
1706 mtid
= ISIS_MT_DISABLE
;
1707 isis_tlvs_add_extended_reach(lsp
->tlvs
, mtid
, ne_id
, 0, NULL
);
1709 "ISIS (%s): Adding %s.%02x as te-style neighbor (self)",
1710 area
->area_tag
, sysid_print(ne_id
),
1711 LSP_PSEUDO_ID(ne_id
));
1714 adj_list
= list_new();
1715 isis_adj_build_up_list(circuit
->u
.bc
.adjdb
[level
- 1], adj_list
);
1717 for (ALL_LIST_ELEMENTS_RO(adj_list
, node
, adj
)) {
1718 if (!(adj
->level
& level
)) {
1720 "ISIS (%s): Ignoring neighbor %s, level does not intersect",
1721 area
->area_tag
, sysid_print(adj
->sysid
));
1725 if (!(level
== IS_LEVEL_1
1726 && adj
->sys_type
== ISIS_SYSTYPE_L1_IS
)
1727 && !(level
== IS_LEVEL_1
1728 && adj
->sys_type
== ISIS_SYSTYPE_L2_IS
1729 && adj
->adj_usage
== ISIS_ADJ_LEVEL1AND2
)
1730 && !(level
== IS_LEVEL_2
1731 && adj
->sys_type
== ISIS_SYSTYPE_L2_IS
)) {
1733 "ISIS (%s): Ignoring neighbor %s, level does not match",
1734 area
->area_tag
, sysid_print(adj
->sysid
));
1738 memcpy(ne_id
, adj
->sysid
, ISIS_SYS_ID_LEN
);
1739 if (circuit
->area
->oldmetric
) {
1740 isis_tlvs_add_oldstyle_reach(lsp
->tlvs
, ne_id
, 0);
1742 "ISIS (%s): Adding %s.%02x as old-style neighbor (peer)",
1743 area
->area_tag
, sysid_print(ne_id
),
1744 LSP_PSEUDO_ID(ne_id
));
1746 if (circuit
->area
->newmetric
) {
1747 isis_tlvs_add_extended_reach(lsp
->tlvs
,
1748 ISIS_MT_IPV4_UNICAST
,
1751 "ISIS (%s): Adding %s.%02x as te-style neighbor (peer)",
1752 area
->area_tag
, sysid_print(ne_id
),
1753 LSP_PSEUDO_ID(ne_id
));
1756 list_delete(&adj_list
);
1760 int lsp_generate_pseudo(struct isis_circuit
*circuit
, int level
)
1762 struct lspdb_head
*head
= &circuit
->area
->lspdb
[level
- 1];
1763 struct isis_lsp
*lsp
;
1764 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1765 uint16_t rem_lifetime
, refresh_time
;
1767 if ((circuit
->is_type
& level
) != level
1768 || (circuit
->state
!= C_STATE_UP
)
1769 || (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1770 || (circuit
->u
.bc
.is_dr
[level
- 1] == 0))
1773 memcpy(lsp_id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1774 LSP_FRAGMENT(lsp_id
) = 0;
1775 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1778 * If for some reason have a pseudo LSP in the db already -> regenerate
1780 if (lsp_search(head
, lsp_id
))
1781 return lsp_regenerate_schedule_pseudo(circuit
, level
);
1783 rem_lifetime
= lsp_rem_lifetime(circuit
->area
, level
);
1784 /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
1785 lsp
= lsp_new(circuit
->area
, lsp_id
, rem_lifetime
, 1,
1786 lsp_bits_generate(circuit
->area
->is_type
, 0,
1787 circuit
->area
->attached_bit_send
,
1790 lsp
->area
= circuit
->area
;
1792 lsp_build_pseudo(lsp
, circuit
, level
);
1795 lsp_insert(head
, lsp
);
1796 lsp_flood(lsp
, NULL
);
1798 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1799 thread_cancel(&circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1800 circuit
->lsp_regenerate_pending
[level
- 1] = 0;
1801 if (level
== IS_LEVEL_1
)
1803 master
, lsp_l1_refresh_pseudo
, circuit
, refresh_time
,
1804 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1805 else if (level
== IS_LEVEL_2
)
1807 master
, lsp_l2_refresh_pseudo
, circuit
, refresh_time
,
1808 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1810 if (IS_DEBUG_UPDATE_PACKETS
) {
1812 "ISIS-Upd (%s): Built L%d Pseudo LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus, refresh %hus",
1813 circuit
->area
->area_tag
, level
,
1814 rawlspid_print(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
1815 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1816 lsp
->hdr
.rem_lifetime
, refresh_time
);
1822 static int lsp_regenerate_pseudo(struct isis_circuit
*circuit
, int level
)
1824 struct lspdb_head
*head
= &circuit
->area
->lspdb
[level
- 1];
1825 struct isis_lsp
*lsp
;
1826 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1827 uint16_t rem_lifetime
, refresh_time
;
1829 if ((circuit
->is_type
& level
) != level
1830 || (circuit
->state
!= C_STATE_UP
)
1831 || (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1832 || (circuit
->u
.bc
.is_dr
[level
- 1] == 0))
1835 memcpy(lsp_id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1836 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1837 LSP_FRAGMENT(lsp_id
) = 0;
1839 lsp
= lsp_search(head
, lsp_id
);
1842 flog_err(EC_LIB_DEVELOPMENT
,
1843 "lsp_regenerate_pseudo: no l%d LSP %s found!", level
,
1844 rawlspid_print(lsp_id
));
1848 rem_lifetime
= lsp_rem_lifetime(circuit
->area
, level
);
1849 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
1850 lsp_build_pseudo(lsp
, circuit
, level
);
1851 lsp_inc_seqno(lsp
, 0);
1852 lsp
->last_generated
= time(NULL
);
1853 lsp_flood(lsp
, NULL
);
1855 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1856 if (level
== IS_LEVEL_1
)
1858 master
, lsp_l1_refresh_pseudo
, circuit
, refresh_time
,
1859 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1860 else if (level
== IS_LEVEL_2
)
1862 master
, lsp_l2_refresh_pseudo
, circuit
, refresh_time
,
1863 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1865 if (IS_DEBUG_UPDATE_PACKETS
) {
1867 "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus, refresh %hus",
1868 circuit
->area
->area_tag
, level
,
1869 rawlspid_print(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
1870 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1871 lsp
->hdr
.rem_lifetime
, refresh_time
);
1878 * Something has changed or periodic refresh -> regenerate pseudo LSP
1880 static void lsp_l1_refresh_pseudo(struct thread
*thread
)
1882 struct isis_circuit
*circuit
;
1883 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1885 circuit
= THREAD_ARG(thread
);
1887 circuit
->u
.bc
.t_refresh_pseudo_lsp
[0] = NULL
;
1888 circuit
->lsp_regenerate_pending
[0] = 0;
1890 if ((circuit
->u
.bc
.is_dr
[0] == 0)
1891 || (circuit
->is_type
& IS_LEVEL_1
) == 0) {
1892 memcpy(id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1893 LSP_PSEUDO_ID(id
) = circuit
->circuit_id
;
1894 LSP_FRAGMENT(id
) = 0;
1895 lsp_purge_pseudo(id
, circuit
, IS_LEVEL_1
);
1899 lsp_regenerate_pseudo(circuit
, IS_LEVEL_1
);
1902 static void lsp_l2_refresh_pseudo(struct thread
*thread
)
1904 struct isis_circuit
*circuit
;
1905 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1907 circuit
= THREAD_ARG(thread
);
1909 circuit
->u
.bc
.t_refresh_pseudo_lsp
[1] = NULL
;
1910 circuit
->lsp_regenerate_pending
[1] = 0;
1912 if ((circuit
->u
.bc
.is_dr
[1] == 0)
1913 || (circuit
->is_type
& IS_LEVEL_2
) == 0) {
1914 memcpy(id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1915 LSP_PSEUDO_ID(id
) = circuit
->circuit_id
;
1916 LSP_FRAGMENT(id
) = 0;
1917 lsp_purge_pseudo(id
, circuit
, IS_LEVEL_2
);
1921 lsp_regenerate_pseudo(circuit
, IS_LEVEL_2
);
1924 int lsp_regenerate_schedule_pseudo(struct isis_circuit
*circuit
, int level
)
1926 struct isis_lsp
*lsp
;
1927 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1931 struct isis_area
*area
= circuit
->area
;
1933 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
1934 || circuit
->state
!= C_STATE_UP
)
1938 "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s",
1939 area
->area_tag
, circuit_t2string(level
),
1940 circuit
->interface
->name
);
1942 memcpy(lsp_id
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1943 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1944 LSP_FRAGMENT(lsp_id
) = 0;
1947 for (lvl
= IS_LEVEL_1
; lvl
<= IS_LEVEL_2
; lvl
++) {
1949 "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled",
1950 area
->area_tag
, lvl
);
1952 if (!((level
& lvl
) && (circuit
->is_type
& lvl
))) {
1953 sched_debug("ISIS (%s): Level is not active on circuit",
1958 if (circuit
->u
.bc
.is_dr
[lvl
- 1] == 0) {
1960 "ISIS (%s): This IS is not DR, nothing to do.",
1965 if (circuit
->lsp_regenerate_pending
[lvl
- 1]) {
1966 struct timeval remain
= thread_timer_remain(
1967 circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1969 "ISIS (%s): Regenerate is already pending, nothing todo. (Due in %lld.%03lld seconds)",
1970 area
->area_tag
, (long long)remain
.tv_sec
,
1971 (long long)remain
.tv_usec
/ 1000);
1975 lsp
= lsp_search(&circuit
->area
->lspdb
[lvl
- 1], lsp_id
);
1978 "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.",
1984 * Throttle avoidance
1987 "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld",
1988 area
->area_tag
, (long long)lsp
->last_generated
,
1990 thread_cancel(&circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1991 diff
= now
- lsp
->last_generated
;
1992 if (diff
< circuit
->area
->lsp_gen_interval
[lvl
- 1]) {
1994 1000 * (circuit
->area
->lsp_gen_interval
[lvl
- 1]
1997 "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval",
1998 area
->area_tag
, timeout
);
2002 "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution in %ld ms.",
2003 area
->area_tag
, timeout
);
2006 circuit
->lsp_regenerate_pending
[lvl
- 1] = 1;
2008 if (lvl
== IS_LEVEL_1
) {
2009 thread_add_timer_msec(
2010 master
, lsp_l1_refresh_pseudo
, circuit
, timeout
,
2011 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
2012 } else if (lvl
== IS_LEVEL_2
) {
2013 thread_add_timer_msec(
2014 master
, lsp_l2_refresh_pseudo
, circuit
, timeout
,
2015 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
2023 * Walk through LSPs for an area
2024 * - set remaining lifetime
2026 void lsp_tick(struct thread
*thread
)
2028 struct isis_area
*area
;
2029 struct isis_lsp
*lsp
;
2031 uint16_t rem_lifetime
;
2032 bool fabricd_sync_incomplete
= false;
2034 area
= THREAD_ARG(thread
);
2036 area
->t_tick
= NULL
;
2037 thread_add_timer(master
, lsp_tick
, area
, 1, &area
->t_tick
);
2039 struct isis_circuit
*fabricd_init_c
= fabricd_initial_sync_circuit(area
);
2042 * Remove LSPs which have aged out
2044 for (level
= 0; level
< ISIS_LEVELS
; level
++) {
2045 struct isis_lsp
*next
= lspdb_first(&area
->lspdb
[level
]);
2046 frr_each_from (lspdb
, &area
->lspdb
[level
], lsp
, next
) {
2048 * The lsp rem_lifetime is kept at 0 for MaxAge
2050 * ZeroAgeLifetime depending on explicit purge
2052 * natural age out. So schedule spf only once
2054 * the first time rem_lifetime becomes 0.
2056 rem_lifetime
= lsp
->hdr
.rem_lifetime
;
2060 * Schedule may run spf which should be done
2062 * the lsp rem_lifetime becomes 0 for the first
2064 * ISO 10589 - 7.3.16.4 first paragraph.
2066 if (rem_lifetime
== 1 && lsp
->hdr
.seqno
!= 0) {
2067 /* 7.3.16.4 a) set SRM flags on all */
2068 /* 7.3.16.4 b) retain only the header */
2069 if (lsp
->area
->purge_originator
)
2070 lsp_purge(lsp
, lsp
->level
, NULL
);
2072 lsp_flood(lsp
, NULL
);
2073 /* 7.3.16.4 c) record the time to purge
2075 isis_spf_schedule(lsp
->area
, lsp
->level
);
2076 isis_te_lsp_event(lsp
, LSP_TICK
);
2079 if (lsp
->age_out
== 0) {
2081 "ISIS-Upd (%s): L%u LSP %s seq 0x%08x aged out",
2082 area
->area_tag
, lsp
->level
,
2083 rawlspid_print(lsp
->hdr
.lsp_id
),
2086 /* if we're aging out fragment 0, lsp_destroy()
2087 * below will delete all other fragments too,
2088 * so we need to skip over those
2090 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
))
2092 !memcmp(next
->hdr
.lsp_id
,
2094 ISIS_SYS_ID_LEN
+ 1))
2096 &area
->lspdb
[level
],
2099 lspdb_del(&area
->lspdb
[level
], lsp
);
2104 if (fabricd_init_c
&& lsp
) {
2105 fabricd_sync_incomplete
|=
2106 ISIS_CHECK_FLAG(lsp
->SSNflags
,
2113 && !fabricd_sync_incomplete
2114 && !isis_tx_queue_len(fabricd_init_c
->tx_queue
)) {
2115 fabricd_initial_sync_finish(area
);
2119 void lsp_purge_pseudo(uint8_t *id
, struct isis_circuit
*circuit
, int level
)
2121 struct isis_lsp
*lsp
;
2123 lsp
= lsp_search(&circuit
->area
->lspdb
[level
- 1], id
);
2127 lsp_purge(lsp
, level
, NULL
);
2131 * Purge own LSP that is received and we don't have.
2132 * -> Do as in 7.3.16.4
2134 void lsp_purge_non_exist(int level
, struct isis_lsp_hdr
*hdr
,
2135 struct isis_area
*area
)
2137 struct isis_lsp
*lsp
;
2140 * We need to create the LSP to be purged
2142 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
2145 lsp_adjust_stream(lsp
);
2146 lsp
->age_out
= ZERO_AGE_LIFETIME
;
2147 lsp
->area
->lsp_purge_count
[level
- 1]++;
2149 memcpy(&lsp
->hdr
, hdr
, sizeof(lsp
->hdr
));
2150 lsp
->hdr
.rem_lifetime
= 0;
2152 lsp_purge_add_poi(lsp
, NULL
);
2156 lsp_insert(&area
->lspdb
[lsp
->level
- 1], lsp
);
2157 lsp_flood(lsp
, NULL
);
2162 void lsp_set_all_srmflags(struct isis_lsp
*lsp
, bool set
)
2164 struct listnode
*node
;
2165 struct isis_circuit
*circuit
;
2172 struct list
*circuit_list
= lsp
->area
->circuit_list
;
2173 for (ALL_LIST_ELEMENTS_RO(circuit_list
, node
, circuit
)) {
2175 isis_tx_queue_add(circuit
->tx_queue
, lsp
,
2178 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
2183 void _lsp_flood(struct isis_lsp
*lsp
, struct isis_circuit
*circuit
,
2184 const char *func
, const char *file
, int line
)
2186 if (IS_DEBUG_FLOODING
) {
2187 zlog_debug("Flooding LSP %s%s%s (From %s %s:%d)",
2188 rawlspid_print(lsp
->hdr
.lsp_id
),
2189 circuit
? " except on " : "",
2190 circuit
? circuit
->interface
->name
: "",
2195 lsp_set_all_srmflags(lsp
, true);
2197 fabricd_lsp_flood(lsp
, circuit
);
2200 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
2203 static int lsp_handle_adj_state_change(struct isis_adjacency
*adj
)
2205 lsp_regenerate_schedule(adj
->circuit
->area
, IS_LEVEL_1
| IS_LEVEL_2
, 0);
2207 /* when an adjacency state changes determine if we need to
2208 * change attach_bits in other area's LSPs
2210 isis_reset_attach_bit(adj
);
2216 * Iterate over all IP reachability TLVs in a LSP (all fragments) of the given
2217 * address-family and MT-ID.
2219 int isis_lsp_iterate_ip_reach(struct isis_lsp
*lsp
, int family
, uint16_t mtid
,
2220 lsp_ip_reach_iter_cb cb
, void *arg
)
2222 bool pseudo_lsp
= LSP_PSEUDO_ID(lsp
->hdr
.lsp_id
);
2223 struct isis_lsp
*frag
;
2224 struct listnode
*node
;
2226 if (lsp
->hdr
.seqno
== 0 || lsp
->hdr
.rem_lifetime
== 0)
2227 return LSP_ITER_CONTINUE
;
2231 if (!fabricd
&& !pseudo_lsp
&& family
== AF_INET
2232 && mtid
== ISIS_MT_IPV4_UNICAST
) {
2233 struct isis_item_list
*reachs
[] = {
2234 &lsp
->tlvs
->oldstyle_ip_reach
,
2235 &lsp
->tlvs
->oldstyle_ip_reach_ext
};
2237 for (unsigned int i
= 0; i
< array_size(reachs
); i
++) {
2238 struct isis_oldstyle_ip_reach
*r
;
2240 for (r
= (struct isis_oldstyle_ip_reach
*)
2244 bool external
= i
? true : false;
2246 if ((*cb
)((struct prefix
*)&r
->prefix
,
2247 r
->metric
, external
, NULL
,
2250 return LSP_ITER_STOP
;
2255 if (!pseudo_lsp
&& family
== AF_INET
) {
2256 struct isis_item_list
*ipv4_reachs
;
2258 if (mtid
== ISIS_MT_IPV4_UNICAST
)
2259 ipv4_reachs
= &lsp
->tlvs
->extended_ip_reach
;
2261 ipv4_reachs
= isis_lookup_mt_items(
2262 &lsp
->tlvs
->mt_ip_reach
, mtid
);
2264 struct isis_extended_ip_reach
*r
;
2265 for (r
= ipv4_reachs
? (struct isis_extended_ip_reach
*)
2269 if ((*cb
)((struct prefix
*)&r
->prefix
,
2270 r
->metric
, false, r
->subtlvs
, arg
)
2272 return LSP_ITER_STOP
;
2276 if (!pseudo_lsp
&& family
== AF_INET6
) {
2277 struct isis_item_list
*ipv6_reachs
;
2278 struct isis_ipv6_reach
*r
;
2280 if (mtid
== ISIS_MT_IPV4_UNICAST
)
2281 ipv6_reachs
= &lsp
->tlvs
->ipv6_reach
;
2283 ipv6_reachs
= isis_lookup_mt_items(
2284 &lsp
->tlvs
->mt_ipv6_reach
, mtid
);
2286 for (r
= ipv6_reachs
? (struct isis_ipv6_reach
*)
2290 if ((*cb
)((struct prefix
*)&r
->prefix
,
2291 r
->metric
, r
->external
, r
->subtlvs
,
2294 return LSP_ITER_STOP
;
2299 /* Parse LSP fragments if it is not a fragment itself */
2300 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
))
2301 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
)) {
2305 if (isis_lsp_iterate_ip_reach(frag
, family
, mtid
, cb
,
2308 return LSP_ITER_STOP
;
2311 return LSP_ITER_CONTINUE
;
2315 * Iterate over all IS reachability TLVs in a LSP (all fragments) of the given
2318 int isis_lsp_iterate_is_reach(struct isis_lsp
*lsp
, uint16_t mtid
,
2319 lsp_is_reach_iter_cb cb
, void *arg
)
2321 bool pseudo_lsp
= LSP_PSEUDO_ID(lsp
->hdr
.lsp_id
);
2322 struct isis_lsp
*frag
;
2323 struct listnode
*node
;
2324 struct isis_item
*head
;
2325 struct isis_item_list
*te_neighs
;
2327 if (lsp
->hdr
.seqno
== 0 || lsp
->hdr
.rem_lifetime
== 0)
2328 return LSP_ITER_CONTINUE
;
2332 if (pseudo_lsp
|| mtid
== ISIS_MT_IPV4_UNICAST
) {
2333 head
= lsp
->tlvs
->oldstyle_reach
.head
;
2334 for (struct isis_oldstyle_reach
*reach
=
2335 (struct isis_oldstyle_reach
*)head
;
2336 reach
; reach
= reach
->next
) {
2337 if ((*cb
)(reach
->id
, reach
->metric
, true, NULL
,
2340 return LSP_ITER_STOP
;
2344 if (pseudo_lsp
|| mtid
== ISIS_MT_IPV4_UNICAST
)
2345 te_neighs
= &lsp
->tlvs
->extended_reach
;
2348 isis_get_mt_items(&lsp
->tlvs
->mt_reach
, mtid
);
2350 head
= te_neighs
->head
;
2351 for (struct isis_extended_reach
*reach
=
2352 (struct isis_extended_reach
*)head
;
2353 reach
; reach
= reach
->next
) {
2354 if ((*cb
)(reach
->id
, reach
->metric
, false,
2355 reach
->subtlvs
, arg
)
2357 return LSP_ITER_STOP
;
2362 /* Parse LSP fragments if it not a fragment itself. */
2363 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
))
2364 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
)) {
2368 if (isis_lsp_iterate_is_reach(frag
, mtid
, cb
, arg
)
2370 return LSP_ITER_STOP
;
2373 return LSP_ITER_CONTINUE
;
2378 hook_register(isis_adj_state_change_hook
,
2379 lsp_handle_adj_state_change
);