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 static int lsp_refresh(struct thread
*thread
);
64 static int lsp_l1_refresh_pseudo(struct thread
*thread
);
65 static int lsp_l2_refresh_pseudo(struct thread
*thread
);
67 static void lsp_destroy(struct isis_lsp
*lsp
);
69 int lsp_id_cmp(uint8_t *id1
, uint8_t *id2
)
71 return memcmp(id1
, id2
, ISIS_SYS_ID_LEN
+ 2);
74 int lspdb_compare(const struct isis_lsp
*a
, const struct isis_lsp
*b
)
76 return memcmp(a
->hdr
.lsp_id
, b
->hdr
.lsp_id
, sizeof(a
->hdr
.lsp_id
));
79 void lsp_db_init(struct lspdb_head
*head
)
84 void lsp_db_fini(struct lspdb_head
*head
)
88 while ((lsp
= lspdb_pop(head
)))
93 struct isis_lsp
*lsp_search(struct lspdb_head
*head
, const uint8_t *id
)
95 struct isis_lsp searchfor
;
96 memcpy(searchfor
.hdr
.lsp_id
, id
, sizeof(searchfor
.hdr
.lsp_id
));
98 return lspdb_find(head
, &searchfor
);
101 static void lsp_clear_data(struct isis_lsp
*lsp
)
106 isis_free_tlvs(lsp
->tlvs
);
110 static void lsp_remove_frags(struct lspdb_head
*head
, struct list
*frags
);
112 static void lsp_destroy(struct isis_lsp
*lsp
)
114 struct listnode
*cnode
;
115 struct isis_circuit
*circuit
;
120 for (ALL_LIST_ELEMENTS_RO(lsp
->area
->circuit_list
, cnode
, circuit
))
121 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
123 ISIS_FLAGS_CLEAR_ALL(lsp
->SSNflags
);
127 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
)) {
128 if (lsp
->lspu
.frags
) {
129 lsp_remove_frags(&lsp
->area
->lspdb
[lsp
->level
- 1],
131 list_delete(&lsp
->lspu
.frags
);
134 if (lsp
->lspu
.zero_lsp
135 && lsp
->lspu
.zero_lsp
->lspu
.frags
) {
136 listnode_delete(lsp
->lspu
.zero_lsp
->lspu
.frags
, lsp
);
140 isis_spf_schedule(lsp
->area
, lsp
->level
);
143 stream_free(lsp
->pdu
);
145 fabricd_lsp_free(lsp
);
146 XFREE(MTYPE_ISIS_LSP
, lsp
);
150 * Remove all the frags belonging to the given lsp
152 static void lsp_remove_frags(struct lspdb_head
*head
, struct list
*frags
)
154 struct listnode
*lnode
, *lnnode
;
155 struct isis_lsp
*lsp
;
157 for (ALL_LIST_ELEMENTS(frags
, lnode
, lnnode
, lsp
)) {
158 lsp
= lsp_search(head
, lsp
->hdr
.lsp_id
);
159 lspdb_del(head
, lsp
);
164 void lsp_search_and_destroy(struct lspdb_head
*head
, const uint8_t *id
)
166 struct isis_lsp
*lsp
;
168 lsp
= lsp_search(head
, id
);
170 lspdb_del(head
, lsp
);
172 * If this is a zero lsp, remove all the frags now
174 if (LSP_FRAGMENT(lsp
->hdr
.lsp_id
) == 0) {
176 lsp_remove_frags(head
, lsp
->lspu
.frags
);
179 * else just remove this frag, from the zero lsps' frag
182 if (lsp
->lspu
.zero_lsp
183 && lsp
->lspu
.zero_lsp
->lspu
.frags
)
184 listnode_delete(lsp
->lspu
.zero_lsp
->lspu
.frags
,
192 * Compares a LSP to given values
193 * Params are given in net order
195 int lsp_compare(char *areatag
, struct isis_lsp
*lsp
, uint32_t seqno
,
196 uint16_t checksum
, uint16_t rem_lifetime
)
198 if (lsp
->hdr
.seqno
== seqno
&& lsp
->hdr
.checksum
== checksum
199 && ((lsp
->hdr
.rem_lifetime
== 0 && rem_lifetime
== 0)
200 || (lsp
->hdr
.rem_lifetime
!= 0 && rem_lifetime
!= 0))) {
201 if (IS_DEBUG_SNP_PACKETS
) {
203 "ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus",
204 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
),
205 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
206 lsp
->hdr
.rem_lifetime
);
208 "ISIS-Snp (%s): is equal to ours seq 0x%08x, cksum 0x%04hx, lifetime %hus",
209 areatag
, seqno
, checksum
, rem_lifetime
);
215 * LSPs with identical checksums should only be treated as newer if:
216 * a) The current LSP has a remaining lifetime != 0 and the other LSP
218 * remaining lifetime == 0. In this case, we should participate in
220 * and should not treat the current LSP with remaining lifetime == 0
222 * b) The LSP has an incorrect checksum. In this case, we need to react
226 if (seqno
> lsp
->hdr
.seqno
227 || (seqno
== lsp
->hdr
.seqno
228 && ((lsp
->hdr
.rem_lifetime
!= 0 && rem_lifetime
== 0)
229 || (lsp
->hdr
.checksum
!= checksum
230 && lsp
->hdr
.rem_lifetime
)))) {
231 if (IS_DEBUG_SNP_PACKETS
) {
233 "ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus",
234 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
), seqno
,
235 checksum
, rem_lifetime
);
237 "ISIS-Snp (%s): is newer than ours seq 0x%08x, cksum 0x%04hx, lifetime %hus",
238 areatag
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
239 lsp
->hdr
.rem_lifetime
);
243 if (IS_DEBUG_SNP_PACKETS
) {
244 zlog_debug("ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus",
245 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
), seqno
,
246 checksum
, rem_lifetime
);
248 "ISIS-Snp (%s): is older than ours seq 0x%08x, cksum 0x%04hx, lifetime %hus",
249 areatag
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
250 lsp
->hdr
.rem_lifetime
);
256 static void put_lsp_hdr(struct isis_lsp
*lsp
, size_t *len_pointer
, bool keep
)
259 (lsp
->level
== IS_LEVEL_1
) ? L1_LINK_STATE
: L2_LINK_STATE
;
260 struct isis_lsp_hdr
*hdr
= &lsp
->hdr
;
261 struct stream
*stream
= lsp
->pdu
;
262 size_t orig_getp
= 0, orig_endp
= 0;
265 orig_getp
= stream_get_getp(lsp
->pdu
);
266 orig_endp
= stream_get_endp(lsp
->pdu
);
269 stream_set_getp(lsp
->pdu
, 0);
270 stream_set_endp(lsp
->pdu
, 0);
272 fill_fixed_hdr(pdu_type
, stream
);
275 *len_pointer
= stream_get_endp(stream
);
276 stream_putw(stream
, hdr
->pdu_len
);
277 stream_putw(stream
, hdr
->rem_lifetime
);
278 stream_put(stream
, hdr
->lsp_id
, sizeof(hdr
->lsp_id
));
279 stream_putl(stream
, hdr
->seqno
);
280 stream_putw(stream
, hdr
->checksum
);
281 stream_putc(stream
, hdr
->lsp_bits
);
284 stream_set_endp(lsp
->pdu
, orig_endp
);
285 stream_set_getp(lsp
->pdu
, orig_getp
);
289 static void lsp_add_auth(struct isis_lsp
*lsp
)
291 struct isis_passwd
*passwd
;
292 passwd
= (lsp
->level
== IS_LEVEL_1
) ? &lsp
->area
->area_passwd
293 : &lsp
->area
->domain_passwd
;
294 isis_tlvs_add_auth(lsp
->tlvs
, passwd
);
297 static void lsp_pack_pdu(struct isis_lsp
*lsp
)
300 lsp
->tlvs
= isis_alloc_tlvs();
305 put_lsp_hdr(lsp
, &len_pointer
, false);
306 isis_pack_tlvs(lsp
->tlvs
, lsp
->pdu
, len_pointer
, false, true);
308 lsp
->hdr
.pdu_len
= stream_get_endp(lsp
->pdu
);
310 ntohs(fletcher_checksum(STREAM_DATA(lsp
->pdu
) + 12,
311 stream_get_endp(lsp
->pdu
) - 12, 12));
314 void lsp_inc_seqno(struct isis_lsp
*lsp
, uint32_t seqno
)
318 if (seqno
== 0 || lsp
->hdr
.seqno
> seqno
)
319 newseq
= lsp
->hdr
.seqno
+ 1;
324 /* check for overflow */
325 if (newseq
< lsp
->hdr
.seqno
) {
326 /* send northbound notification */
327 lsp
->area
->lsp_exceeded_max_counter
++;
328 isis_notif_lsp_exceed_max(lsp
->area
, lsp
->hdr
.lsp_id
);
330 #endif /* ifndef FABRICD */
332 lsp
->hdr
.seqno
= newseq
;
335 isis_spf_schedule(lsp
->area
, lsp
->level
);
338 static void lsp_purge_add_poi(struct isis_lsp
*lsp
,
339 const uint8_t *sender
)
341 if (lsp
->area
== NULL
)
344 if (!lsp
->area
->purge_originator
)
347 /* add purge originator identification */
349 lsp
->tlvs
= isis_alloc_tlvs();
350 isis_tlvs_set_purge_originator(lsp
->tlvs
, lsp
->area
->isis
->sysid
,
352 isis_tlvs_set_dynamic_hostname(lsp
->tlvs
, cmd_hostname_get());
355 static void lsp_purge(struct isis_lsp
*lsp
, int level
,
356 const uint8_t *sender
)
360 stream_reset(lsp
->pdu
);
363 lsp
->hdr
.checksum
= 0;
364 lsp
->hdr
.rem_lifetime
= 0;
366 lsp
->age_out
= lsp
->area
->max_lsp_lifetime
[level
- 1];
367 lsp
->area
->lsp_purge_count
[level
- 1]++;
369 lsp_purge_add_poi(lsp
, sender
);
372 lsp_flood(lsp
, NULL
);
376 * Generates checksum for LSP and its frags
378 static void lsp_seqno_update(struct isis_lsp
*lsp0
)
380 struct isis_lsp
*lsp
;
381 struct listnode
*node
;
383 lsp_inc_seqno(lsp0
, 0);
385 if (!lsp0
->lspu
.frags
)
388 for (ALL_LIST_ELEMENTS_RO(lsp0
->lspu
.frags
, node
, lsp
)) {
390 lsp_inc_seqno(lsp
, 0);
391 else if (lsp
->hdr
.rem_lifetime
) {
392 /* Purge should only be applied when the fragment has
393 * non-zero remaining lifetime.
395 lsp_purge(lsp
, lsp0
->level
, NULL
);
402 static bool isis_level2_adj_up(struct isis_area
*curr_area
)
404 struct listnode
*node
, *cnode
;
405 struct isis_circuit
*circuit
;
407 struct isis_adjacency
*adj
;
408 struct isis
*isis
= curr_area
->isis
;
409 struct isis_area
*area
;
411 /* lookup for a Level2 adjacency up in another area */
412 for (ALL_LIST_ELEMENTS_RO(isis
->area_list
, node
, area
)) {
414 && strcmp(area
->area_tag
, curr_area
->area_tag
) == 0)
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
*curr_adj
)
442 struct listnode
*node
;
443 struct isis_area
*curr_area
= curr_adj
->circuit
->area
;
444 struct isis
*isis
= curr_area
->isis
;
445 struct isis_area
*area
;
446 struct lspdb_head
*head
;
447 struct isis_lsp
*lsp
;
448 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
450 /* If new adjaceny is up and area is level2 or level1and2 verify if
451 * we have LSPs in other areas that should now set the attach bit.
453 * If adjacenty is down, verify if we no longer have another level2
454 * or level1and2 areas so that we should now remove the attach bit.
456 if (curr_area
->is_type
== IS_LEVEL_1
)
459 for (ALL_LIST_ELEMENTS_RO(isis
->area_list
, node
, area
)) {
461 && strcmp(area
->area_tag
, curr_area
->area_tag
) == 0)
464 if (!area
->attached_bit_send
)
467 head
= &area
->lspdb
[IS_LEVEL_1
- 1];
468 memset(lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
469 memcpy(lspid
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
471 lsp
= lsp_search(head
, lspid
);
475 if (curr_adj
->adj_state
== ISIS_ADJ_UP
476 && !(lsp
->hdr
.lsp_bits
& LSPBIT_ATT
)) {
478 "ISIS (%s): adj going up regenerate lsp-bits",
480 lsp_regenerate_schedule(area
, IS_LEVEL_1
, 0);
481 } else if (curr_adj
->adj_state
== ISIS_ADJ_DOWN
482 && lsp
->hdr
.lsp_bits
& LSPBIT_ATT
483 && !isis_level2_adj_up(area
)) {
485 "ISIS (%s): adj going down regenerate lsp-bits",
487 lsp_regenerate_schedule(area
, IS_LEVEL_1
, 0);
492 static uint8_t lsp_bits_generate(int level
, int overload_bit
, int attached_bit
,
493 struct isis_area
*area
)
495 uint8_t lsp_bits
= 0;
496 if (level
== IS_LEVEL_1
)
497 lsp_bits
= IS_LEVEL_1
;
499 lsp_bits
= IS_LEVEL_1_AND_2
;
501 lsp_bits
|= overload_bit
;
503 /* only set the attach bit if we are a level-1-2 router and this is
504 * a level-1 LSP and we have a level-2 adjacency up from another area
506 if (area
->is_type
== IS_LEVEL_1_AND_2
&& level
== IS_LEVEL_1
507 && attached_bit
&& isis_level2_adj_up(area
))
508 lsp_bits
|= LSPBIT_ATT
;
512 static void lsp_update_data(struct isis_lsp
*lsp
, struct isis_lsp_hdr
*hdr
,
513 struct isis_tlvs
*tlvs
, struct stream
*stream
,
514 struct isis_area
*area
, int level
)
516 /* free the old lsp data */
519 /* copying only the relevant part of our stream */
520 if (lsp
->pdu
!= NULL
)
521 stream_free(lsp
->pdu
);
522 lsp
->pdu
= stream_dup(stream
);
524 memcpy(&lsp
->hdr
, hdr
, sizeof(lsp
->hdr
));
527 lsp
->age_out
= ZERO_AGE_LIFETIME
;
528 lsp
->installed
= time(NULL
);
532 if (area
->dynhostname
&& lsp
->tlvs
->hostname
533 && lsp
->hdr
.rem_lifetime
) {
534 isis_dynhn_insert(lsp
->hdr
.lsp_id
, lsp
->tlvs
->hostname
,
535 (lsp
->hdr
.lsp_bits
& LSPBIT_IST
)
544 static void lsp_link_fragment(struct isis_lsp
*lsp
, struct isis_lsp
*lsp0
)
546 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
)) {
547 /* zero lsp -> create list to store fragments */
548 lsp
->lspu
.frags
= list_new();
550 /* fragment -> set backpointer and add to zero lsps list */
552 lsp
->lspu
.zero_lsp
= lsp0
;
553 listnode_add(lsp0
->lspu
.frags
, lsp
);
557 void lsp_update(struct isis_lsp
*lsp
, struct isis_lsp_hdr
*hdr
,
558 struct isis_tlvs
*tlvs
, struct stream
*stream
,
559 struct isis_area
*area
, int level
, bool confusion
)
564 "ISIS-Upd (%s): BUG updating LSP %s still marked as own LSP",
565 area
->area_tag
, rawlspid_print(lsp
->hdr
.lsp_id
));
571 lsp_purge(lsp
, level
, NULL
);
573 lsp_update_data(lsp
, hdr
, tlvs
, stream
, area
, level
);
576 if (LSP_FRAGMENT(lsp
->hdr
.lsp_id
) && !lsp
->lspu
.zero_lsp
) {
577 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
578 struct isis_lsp
*lsp0
;
580 memcpy(lspid
, lsp
->hdr
.lsp_id
, ISIS_SYS_ID_LEN
+ 1);
581 LSP_FRAGMENT(lspid
) = 0;
582 lsp0
= lsp_search(&area
->lspdb
[level
- 1], lspid
);
584 lsp_link_fragment(lsp
, lsp0
);
588 isis_spf_schedule(lsp
->area
, lsp
->level
);
591 /* creation of LSP directly from what we received */
592 struct isis_lsp
*lsp_new_from_recv(struct isis_lsp_hdr
*hdr
,
593 struct isis_tlvs
*tlvs
,
594 struct stream
*stream
, struct isis_lsp
*lsp0
,
595 struct isis_area
*area
, int level
)
597 struct isis_lsp
*lsp
;
599 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
600 lsp_update_data(lsp
, hdr
, tlvs
, stream
, area
, level
);
601 lsp_link_fragment(lsp
, lsp0
);
606 static void lsp_adjust_stream(struct isis_lsp
*lsp
)
609 if (STREAM_SIZE(lsp
->pdu
) == LLC_LEN
+ lsp
->area
->lsp_mtu
)
611 stream_free(lsp
->pdu
);
614 lsp
->pdu
= stream_new(LLC_LEN
+ lsp
->area
->lsp_mtu
);
617 struct isis_lsp
*lsp_new(struct isis_area
*area
, uint8_t *lsp_id
,
618 uint16_t rem_lifetime
, uint32_t seqno
,
619 uint8_t lsp_bits
, uint16_t checksum
,
620 struct isis_lsp
*lsp0
, int level
)
622 struct isis_lsp
*lsp
;
624 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
627 lsp_adjust_stream(lsp
);
629 /* Minimal LSP PDU size */
630 lsp
->hdr
.pdu_len
= ISIS_FIXED_HDR_LEN
+ ISIS_LSP_HDR_LEN
;
631 memcpy(lsp
->hdr
.lsp_id
, lsp_id
, sizeof(lsp
->hdr
.lsp_id
));
632 lsp
->hdr
.checksum
= checksum
;
633 lsp
->hdr
.seqno
= seqno
;
634 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
635 lsp
->hdr
.lsp_bits
= lsp_bits
;
637 lsp
->age_out
= ZERO_AGE_LIFETIME
;
638 lsp_link_fragment(lsp
, lsp0
);
639 put_lsp_hdr(lsp
, NULL
, false);
642 zlog_debug("New LSP with ID %s-%02x-%02x len %d seqnum %08x",
643 sysid_print(lsp_id
), LSP_PSEUDO_ID(lsp
->hdr
.lsp_id
),
644 LSP_FRAGMENT(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
650 void lsp_insert(struct lspdb_head
*head
, struct isis_lsp
*lsp
)
652 lspdb_add(head
, lsp
);
654 isis_spf_schedule(lsp
->area
, lsp
->level
);
658 * Build a list of LSPs with non-zero ht bounded by start and stop ids
660 void lsp_build_list_nonzero_ht(struct lspdb_head
*head
, const uint8_t *start_id
,
661 const uint8_t *stop_id
, struct list
*list
)
663 struct isis_lsp searchfor
;
664 struct isis_lsp
*lsp
, *start
;
666 memcpy(&searchfor
.hdr
.lsp_id
, start_id
, sizeof(searchfor
.hdr
.lsp_id
));
668 start
= lspdb_find_gteq(head
, &searchfor
);
669 frr_each_from (lspdb
, head
, lsp
, start
) {
670 if (memcmp(lsp
->hdr
.lsp_id
, stop_id
,
671 ISIS_SYS_ID_LEN
+ 2) > 0)
674 if (lsp
->hdr
.rem_lifetime
)
675 listnode_add(list
, lsp
);
679 static void lsp_set_time(struct isis_lsp
*lsp
)
683 if (lsp
->hdr
.rem_lifetime
== 0) {
684 if (lsp
->age_out
> 0)
689 lsp
->hdr
.rem_lifetime
--;
690 if (lsp
->pdu
&& stream_get_endp(lsp
->pdu
) >= 12)
691 stream_putw_at(lsp
->pdu
, 10, lsp
->hdr
.rem_lifetime
);
694 void lspid_print(uint8_t *lsp_id
, char *dest
, size_t dest_len
, char dynhost
,
695 char frag
, struct isis
*isis
)
697 struct isis_dynhn
*dyn
= NULL
;
698 char id
[SYSID_STRLEN
];
701 dyn
= dynhn_find_by_id(lsp_id
);
706 snprintf(id
, sizeof(id
), "%.14s", dyn
->hostname
);
707 else if (!memcmp(isis
->sysid
, lsp_id
, ISIS_SYS_ID_LEN
) && dynhost
)
708 snprintf(id
, sizeof(id
), "%.14s", cmd_hostname_get());
710 memcpy(id
, sysid_print(lsp_id
), 15);
713 snprintf(dest
, dest_len
, "%s.%02x-%02x", id
,
714 LSP_PSEUDO_ID(lsp_id
), LSP_FRAGMENT(lsp_id
));
716 snprintf(dest
, dest_len
, "%s.%02x", id
, LSP_PSEUDO_ID(lsp_id
));
719 /* Convert the lsp attribute bits to attribute string */
720 static const char *lsp_bits2string(uint8_t lsp_bits
, char *buf
, size_t buf_size
)
727 if (buf_size
< 2 * 3)
730 /* we only focus on the default metric */
731 pos
+= snprintf(pos
, buf_size
, "%d/",
732 ISIS_MASK_LSP_ATT_BITS(lsp_bits
) ? 1 : 0);
734 pos
+= snprintf(pos
, buf_size
, "%d/",
735 ISIS_MASK_LSP_PARTITION_BIT(lsp_bits
) ? 1 : 0);
737 snprintf(pos
, buf_size
, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits
) ? 1 : 0);
742 /* this function prints the lsp on show isis database */
743 void lsp_print(struct isis_lsp
*lsp
, struct vty
*vty
, char dynhost
,
750 lspid_print(lsp
->hdr
.lsp_id
, LSPid
, sizeof(LSPid
), dynhost
, 1, isis
);
751 vty_out(vty
, "%-21s%c ", LSPid
, lsp
->own_lsp
? '*' : ' ');
752 vty_out(vty
, "%5hu ", lsp
->hdr
.pdu_len
);
753 vty_out(vty
, "0x%08x ", lsp
->hdr
.seqno
);
754 vty_out(vty
, "0x%04hx ", lsp
->hdr
.checksum
);
755 if (lsp
->hdr
.rem_lifetime
== 0) {
756 snprintf(age_out
, sizeof(age_out
), "(%d)", lsp
->age_out
);
758 vty_out(vty
, "%7s ", age_out
);
760 vty_out(vty
, " %5hu ", lsp
->hdr
.rem_lifetime
);
761 vty_out(vty
, "%s\n", lsp_bits2string(lsp
->hdr
.lsp_bits
, b
, sizeof(b
)));
764 void lsp_print_detail(struct isis_lsp
*lsp
, struct vty
*vty
, char dynhost
,
767 lsp_print(lsp
, vty
, dynhost
, isis
);
769 vty_multiline(vty
, " ", "%s", isis_format_tlvs(lsp
->tlvs
));
773 /* print all the lsps info in the local lspdb */
774 int lsp_print_all(struct vty
*vty
, struct lspdb_head
*head
, char detail
,
775 char dynhost
, struct isis
*isis
)
777 struct isis_lsp
*lsp
;
780 if (detail
== ISIS_UI_LEVEL_BRIEF
) {
781 frr_each (lspdb
, head
, lsp
) {
782 lsp_print(lsp
, vty
, dynhost
, isis
);
785 } else if (detail
== ISIS_UI_LEVEL_DETAIL
) {
786 frr_each (lspdb
, head
, lsp
) {
787 lsp_print_detail(lsp
, vty
, dynhost
, isis
);
795 static uint16_t lsp_rem_lifetime(struct isis_area
*area
, int level
)
797 uint16_t rem_lifetime
;
799 /* Add jitter to configured LSP lifetime */
801 isis_jitter(area
->max_lsp_lifetime
[level
- 1], MAX_AGE_JITTER
);
803 /* No jitter if the max refresh will be less than configure gen interval
805 /* N.B. this calucation is acceptable since rem_lifetime is in
808 if (area
->lsp_gen_interval
[level
- 1] > (rem_lifetime
- 300))
809 rem_lifetime
= area
->max_lsp_lifetime
[level
- 1];
814 static uint16_t lsp_refresh_time(struct isis_lsp
*lsp
, uint16_t rem_lifetime
)
816 struct isis_area
*area
= lsp
->area
;
817 int level
= lsp
->level
;
818 uint16_t refresh_time
;
820 /* Add jitter to LSP refresh time */
822 isis_jitter(area
->lsp_refresh
[level
- 1], MAX_LSP_GEN_JITTER
);
824 /* RFC 4444 : make sure the refresh time is at least less than 300
825 * of the remaining lifetime and more than gen interval */
826 if (refresh_time
<= area
->lsp_gen_interval
[level
- 1]
827 || refresh_time
> (rem_lifetime
- 300))
828 refresh_time
= rem_lifetime
- 300;
830 /* In cornercases, refresh_time might be <= lsp_gen_interval, however
831 * we accept this violation to satisfy refresh_time <= rem_lifetime -
837 static void lsp_build_ext_reach_ipv4(struct isis_lsp
*lsp
,
838 struct isis_area
*area
)
840 struct route_table
*er_table
= get_ext_reach(area
, AF_INET
, lsp
->level
);
844 for (struct route_node
*rn
= route_top(er_table
); rn
;
845 rn
= route_next(rn
)) {
849 struct prefix_ipv4
*ipv4
= (struct prefix_ipv4
*)&rn
->p
;
850 struct isis_ext_info
*info
= rn
->info
;
852 uint32_t metric
= info
->metric
;
853 if (metric
> MAX_WIDE_PATH_METRIC
)
854 metric
= MAX_WIDE_PATH_METRIC
;
855 if (area
->oldmetric
&& metric
> 0x3f)
859 isis_tlvs_add_oldstyle_ip_reach(lsp
->tlvs
, ipv4
,
861 if (area
->newmetric
) {
862 struct sr_prefix_cfg
*pcfg
= NULL
;
864 if (area
->srdb
.enabled
)
865 pcfg
= isis_sr_cfg_prefix_find(area
, ipv4
);
867 isis_tlvs_add_extended_ip_reach(lsp
->tlvs
, ipv4
, metric
,
873 static void lsp_build_ext_reach_ipv6(struct isis_lsp
*lsp
,
874 struct isis_area
*area
)
876 struct route_table
*er_table
=
877 get_ext_reach(area
, AF_INET6
, lsp
->level
);
881 for (struct route_node
*rn
= route_top(er_table
); rn
;
882 rn
= srcdest_route_next(rn
)) {
885 struct isis_ext_info
*info
= rn
->info
;
886 struct prefix_ipv6
*p
, *src_p
;
888 srcdest_rnode_prefixes(rn
, (const struct prefix
**)&p
,
889 (const struct prefix
**)&src_p
);
891 uint32_t metric
= info
->metric
;
892 if (info
->metric
> MAX_WIDE_PATH_METRIC
)
893 metric
= MAX_WIDE_PATH_METRIC
;
895 if (!src_p
|| !src_p
->prefixlen
) {
896 struct sr_prefix_cfg
*pcfg
= NULL
;
898 if (area
->srdb
.enabled
)
899 pcfg
= isis_sr_cfg_prefix_find(area
, p
);
901 isis_tlvs_add_ipv6_reach(lsp
->tlvs
,
902 isis_area_ipv6_topology(area
),
903 p
, metric
, true, pcfg
);
904 } else if (isis_area_ipv6_dstsrc_enabled(area
)) {
905 isis_tlvs_add_ipv6_dstsrc_reach(lsp
->tlvs
,
912 static void lsp_build_ext_reach(struct isis_lsp
*lsp
, struct isis_area
*area
)
914 lsp_build_ext_reach_ipv4(lsp
, area
);
915 lsp_build_ext_reach_ipv6(lsp
, area
);
918 static struct isis_lsp
*lsp_next_frag(uint8_t frag_num
, struct isis_lsp
*lsp0
,
919 struct isis_area
*area
, int level
)
921 struct isis_lsp
*lsp
;
922 uint8_t frag_id
[ISIS_SYS_ID_LEN
+ 2];
924 memcpy(frag_id
, lsp0
->hdr
.lsp_id
, ISIS_SYS_ID_LEN
+ 1);
925 LSP_FRAGMENT(frag_id
) = frag_num
;
927 lsp
= lsp_search(&area
->lspdb
[level
- 1], frag_id
);
930 if (!lsp
->lspu
.zero_lsp
)
931 lsp_link_fragment(lsp
, lsp0
);
935 lsp
= lsp_new(area
, frag_id
, lsp0
->hdr
.rem_lifetime
, 0,
936 lsp_bits_generate(level
, area
->overload_bit
,
937 area
->attached_bit_send
, area
),
940 lsp_insert(&area
->lspdb
[level
- 1], lsp
);
945 * Builds the LSP data part. This func creates a new frag whenever
946 * area->lsp_frag_threshold is exceeded.
948 static void lsp_build(struct isis_lsp
*lsp
, struct isis_area
*area
)
950 int level
= lsp
->level
;
951 struct listnode
*node
;
952 struct isis_lsp
*frag
;
955 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
))
956 lsp_clear_data(frag
);
958 lsp
->tlvs
= isis_alloc_tlvs();
959 lsp_debug("ISIS (%s): Constructing local system LSP for level %d",
960 area
->area_tag
, level
);
962 lsp
->hdr
.lsp_bits
= lsp_bits_generate(level
, area
->overload_bit
,
963 area
->attached_bit_send
, area
);
967 isis_tlvs_add_area_addresses(lsp
->tlvs
, area
->area_addrs
);
969 /* Protocols Supported */
970 if (area
->ip_circuits
> 0 || area
->ipv6_circuits
> 0) {
971 struct nlpids nlpids
= {.count
= 0};
973 if (area
->ip_circuits
> 0) {
975 "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs",
977 nlpids
.nlpids
[nlpids
.count
] = NLPID_IP
;
980 if (area
->ipv6_circuits
> 0) {
982 "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs",
984 nlpids
.nlpids
[nlpids
.count
] = NLPID_IPV6
;
987 isis_tlvs_set_protocols_supported(lsp
->tlvs
, &nlpids
);
990 if (area_is_mt(area
)) {
991 lsp_debug("ISIS (%s): Adding MT router tlv...", area
->area_tag
);
993 struct isis_area_mt_setting
**mt_settings
;
994 unsigned int mt_count
;
996 mt_settings
= area_mt_settings(area
, &mt_count
);
997 for (unsigned int i
= 0; i
< mt_count
; i
++) {
998 isis_tlvs_add_mt_router_info(
999 lsp
->tlvs
, mt_settings
[i
]->mtid
,
1000 mt_settings
[i
]->overload
, false);
1001 lsp_debug("ISIS (%s): MT %s", area
->area_tag
,
1002 isis_mtid2str(mt_settings
[i
]->mtid
));
1005 lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)",
1008 /* Dynamic Hostname */
1009 if (area
->dynhostname
) {
1010 isis_tlvs_set_dynamic_hostname(lsp
->tlvs
, cmd_hostname_get());
1011 lsp_debug("ISIS (%s): Adding dynamic hostname '%s'",
1012 area
->area_tag
, cmd_hostname_get());
1014 lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)",
1018 /* Add Router Capability TLV. */
1019 if (area
->isis
->router_id
!= 0) {
1020 struct isis_router_cap cap
= {};
1022 cap
.router_id
.s_addr
= area
->isis
->router_id
;
1024 /* Add SR Sub-TLVs if SR is enabled. */
1025 if (area
->srdb
.enabled
) {
1026 struct isis_sr_db
*srdb
= &area
->srdb
;
1027 uint32_t range_size
;
1030 range_size
= srdb
->config
.srgb_upper_bound
1031 - srdb
->config
.srgb_lower_bound
+ 1;
1032 cap
.srgb
.flags
= ISIS_SUBTLV_SRGB_FLAG_I
1033 | ISIS_SUBTLV_SRGB_FLAG_V
;
1034 cap
.srgb
.range_size
= range_size
;
1035 cap
.srgb
.lower_bound
= srdb
->config
.srgb_lower_bound
;
1036 /* Then Algorithm */
1037 cap
.algo
[0] = SR_ALGORITHM_SPF
;
1038 cap
.algo
[1] = SR_ALGORITHM_UNSET
;
1041 range_size
= srdb
->config
.srlb_upper_bound
1042 - srdb
->config
.srlb_lower_bound
+ 1;
1043 cap
.srlb
.range_size
= range_size
;
1044 cap
.srlb
.lower_bound
= srdb
->config
.srlb_lower_bound
;
1045 /* And finally MSD */
1046 cap
.msd
= srdb
->config
.msd
;
1049 isis_tlvs_set_router_capability(lsp
->tlvs
, &cap
);
1050 lsp_debug("ISIS (%s): Adding Router Capabilities information",
1054 /* IPv4 address and TE router ID TLVs.
1055 * In case of the first one we don't follow "C" vendor,
1056 * but "J" vendor behavior - one IPv4 address is put
1057 * into LSP. TE router ID will be the same if MPLS-TE
1058 * is not activate or MPLS-TE router-id not specified
1060 if (area
->isis
->router_id
!= 0) {
1061 struct in_addr id
= {.s_addr
= area
->isis
->router_id
};
1062 lsp_debug("ISIS (%s): Adding router ID %pI4 as IPv4 tlv.",
1063 area
->area_tag
, &id
);
1064 isis_tlvs_add_ipv4_address(lsp
->tlvs
, &id
);
1066 /* If new style TLV's are in use, add TE router ID TLV
1067 * Check if MPLS-TE is activate and mpls-te router-id set
1068 * otherwise add exactly same data as for IPv4 address
1070 if (area
->newmetric
) {
1071 if (IS_MPLS_TE(area
->mta
)
1072 && area
->mta
->router_id
.s_addr
!= INADDR_ANY
)
1073 id
.s_addr
= area
->mta
->router_id
.s_addr
;
1075 "ISIS (%s): Adding router ID also as TE router ID tlv.",
1077 isis_tlvs_set_te_router_id(lsp
->tlvs
, &id
);
1080 lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.",
1084 lsp_debug("ISIS (%s): Adding circuit specific information.",
1089 "ISIS (%s): Adding tier %hhu spine-leaf-extension tlv.",
1090 area
->area_tag
, fabricd_tier(area
));
1091 isis_tlvs_add_spine_leaf(lsp
->tlvs
, fabricd_tier(area
), true,
1092 false, false, false);
1095 struct isis_circuit
*circuit
;
1096 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, node
, circuit
)) {
1097 if (!circuit
->interface
)
1099 "ISIS (%s): Processing %s circuit %p with unknown interface",
1101 circuit_type2string(circuit
->circ_type
),
1104 lsp_debug("ISIS (%s): Processing %s circuit %s",
1106 circuit_type2string(circuit
->circ_type
),
1107 circuit
->interface
->name
);
1109 if (circuit
->state
!= C_STATE_UP
) {
1110 lsp_debug("ISIS (%s): Circuit is not up, ignoring.",
1115 uint32_t metric
= area
->oldmetric
1116 ? circuit
->metric
[level
- 1]
1117 : circuit
->te_metric
[level
- 1];
1119 if (circuit
->ip_router
&& circuit
->ip_addrs
1120 && circuit
->ip_addrs
->count
> 0) {
1122 "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.",
1124 struct listnode
*ipnode
;
1125 struct prefix_ipv4
*ipv4
;
1126 for (ALL_LIST_ELEMENTS_RO(circuit
->ip_addrs
, ipnode
,
1128 if (area
->oldmetric
) {
1130 "ISIS (%s): Adding old-style IP reachability for %pFX",
1131 area
->area_tag
, ipv4
);
1132 isis_tlvs_add_oldstyle_ip_reach(
1133 lsp
->tlvs
, ipv4
, metric
);
1136 if (area
->newmetric
) {
1137 struct sr_prefix_cfg
*pcfg
= NULL
;
1140 "ISIS (%s): Adding te-style IP reachability for %pFX",
1141 area
->area_tag
, ipv4
);
1143 if (area
->srdb
.enabled
)
1144 pcfg
= isis_sr_cfg_prefix_find(
1147 isis_tlvs_add_extended_ip_reach(
1148 lsp
->tlvs
, ipv4
, metric
, false,
1154 if (circuit
->ipv6_router
&& circuit
->ipv6_non_link
1155 && circuit
->ipv6_non_link
->count
> 0) {
1156 struct listnode
*ipnode
;
1157 struct prefix_ipv6
*ipv6
;
1159 for (ALL_LIST_ELEMENTS_RO(circuit
->ipv6_non_link
,
1161 struct sr_prefix_cfg
*pcfg
= NULL
;
1164 "ISIS (%s): Adding IPv6 reachability for %pFX",
1165 area
->area_tag
, ipv6
);
1167 if (area
->srdb
.enabled
)
1168 pcfg
= isis_sr_cfg_prefix_find(area
,
1171 isis_tlvs_add_ipv6_reach(
1173 isis_area_ipv6_topology(area
), ipv6
,
1174 metric
, false, pcfg
);
1178 switch (circuit
->circ_type
) {
1179 case CIRCUIT_T_BROADCAST
:
1180 if (level
& circuit
->is_type
) {
1182 (level
== IS_LEVEL_1
)
1183 ? circuit
->u
.bc
.l1_desig_is
1184 : circuit
->u
.bc
.l2_desig_is
;
1186 if (LSP_PSEUDO_ID(ne_id
)) {
1187 if (area
->oldmetric
) {
1189 "ISIS (%s): Adding DIS %s.%02x as old-style neighbor",
1192 LSP_PSEUDO_ID(ne_id
));
1193 isis_tlvs_add_oldstyle_reach(
1197 if (area
->newmetric
)
1200 level
, ne_id
, metric
);
1204 "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors",
1208 case CIRCUIT_T_P2P
: {
1209 struct isis_adjacency
*nei
= circuit
->u
.p2p
.neighbor
;
1210 if (nei
&& nei
->adj_state
== ISIS_ADJ_UP
1211 && (level
& nei
->circuit_t
)) {
1213 memcpy(ne_id
, nei
->sysid
, ISIS_SYS_ID_LEN
);
1214 LSP_PSEUDO_ID(ne_id
) = 0;
1216 if (area
->oldmetric
) {
1218 "ISIS (%s): Adding old-style is reach for %s",
1220 sysid_print(ne_id
));
1221 isis_tlvs_add_oldstyle_reach(
1222 lsp
->tlvs
, ne_id
, metric
);
1224 if (area
->newmetric
) {
1225 uint32_t neighbor_metric
;
1226 if (fabricd_tier(area
) == 0) {
1227 neighbor_metric
= 0xffe;
1229 neighbor_metric
= metric
;
1232 tlvs_add_mt_p2p(lsp
->tlvs
, circuit
,
1233 ne_id
, neighbor_metric
);
1237 "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors",
1241 case CIRCUIT_T_LOOPBACK
:
1244 zlog_warn("lsp_area_create: unknown circuit type");
1248 lsp_build_ext_reach(lsp
, area
);
1250 struct isis_tlvs
*tlvs
= lsp
->tlvs
;
1253 lsp_adjust_stream(lsp
);
1255 size_t tlv_space
= STREAM_WRITEABLE(lsp
->pdu
) - LLC_LEN
;
1256 lsp_clear_data(lsp
);
1258 struct list
*fragments
= isis_fragment_tlvs(tlvs
, tlv_space
);
1260 zlog_warn("BUG: could not fragment own LSP:");
1261 log_multiline(LOG_WARNING
, " ", "%s",
1262 isis_format_tlvs(tlvs
));
1263 isis_free_tlvs(tlvs
);
1266 isis_free_tlvs(tlvs
);
1268 bool fragment_overflow
= false;
1270 for (ALL_LIST_ELEMENTS_RO(fragments
, node
, tlvs
)) {
1271 if (node
!= listhead(fragments
)) {
1272 if (LSP_FRAGMENT(frag
->hdr
.lsp_id
) == 255) {
1273 if (!fragment_overflow
) {
1274 fragment_overflow
= true;
1276 "ISIS (%s): Too much information for 256 fragments",
1279 isis_free_tlvs(tlvs
);
1283 frag
= lsp_next_frag(LSP_FRAGMENT(frag
->hdr
.lsp_id
) + 1,
1285 lsp_adjust_stream(frag
);
1290 list_delete(&fragments
);
1291 lsp_debug("ISIS (%s): LSP construction is complete. Serializing...",
1297 * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs
1299 int lsp_generate(struct isis_area
*area
, int level
)
1301 struct isis_lsp
*oldlsp
, *newlsp
;
1302 uint32_t seq_num
= 0;
1303 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
1304 uint16_t rem_lifetime
, refresh_time
;
1306 if ((area
== NULL
) || (area
->is_type
& level
) != level
)
1309 memset(&lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
1311 memcpy(&lspid
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1313 /* only builds the lsp if the area shares the level */
1314 oldlsp
= lsp_search(&area
->lspdb
[level
- 1], lspid
);
1316 /* FIXME: we should actually initiate a purge */
1317 seq_num
= oldlsp
->hdr
.seqno
;
1318 lsp_search_and_destroy(&area
->lspdb
[level
- 1],
1319 oldlsp
->hdr
.lsp_id
);
1321 rem_lifetime
= lsp_rem_lifetime(area
, level
);
1322 newlsp
= lsp_new(area
, lspid
, rem_lifetime
, seq_num
,
1323 lsp_bits_generate(area
->is_type
, area
->overload_bit
,
1324 area
->attached_bit_send
, area
),
1326 newlsp
->area
= area
;
1327 newlsp
->own_lsp
= 1;
1329 lsp_insert(&area
->lspdb
[level
- 1], newlsp
);
1330 /* build_lsp_data (newlsp, area); */
1331 lsp_build(newlsp
, area
);
1332 /* time to calculate our checksum */
1333 lsp_seqno_update(newlsp
);
1334 newlsp
->last_generated
= time(NULL
);
1335 lsp_flood(newlsp
, NULL
);
1336 area
->lsp_gen_count
[level
- 1]++;
1338 refresh_time
= lsp_refresh_time(newlsp
, rem_lifetime
);
1340 thread_cancel(&area
->t_lsp_refresh
[level
- 1]);
1341 area
->lsp_regenerate_pending
[level
- 1] = 0;
1342 thread_add_timer(master
, lsp_refresh
,
1343 &area
->lsp_refresh_arg
[level
- 1], refresh_time
,
1344 &area
->t_lsp_refresh
[level
- 1]);
1346 if (IS_DEBUG_UPDATE_PACKETS
) {
1347 zlog_debug("ISIS-Upd (%s): Building L%d LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus refresh %hus",
1348 area
->area_tag
, level
,
1349 rawlspid_print(newlsp
->hdr
.lsp_id
),
1350 newlsp
->hdr
.pdu_len
, newlsp
->hdr
.seqno
,
1351 newlsp
->hdr
.checksum
, newlsp
->hdr
.rem_lifetime
,
1355 "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.",
1356 area
->area_tag
, level
);
1359 /* send northbound notification */
1360 isis_notif_lsp_gen(area
, newlsp
->hdr
.lsp_id
, newlsp
->hdr
.seqno
,
1361 newlsp
->last_generated
);
1362 #endif /* ifndef FABRICD */
1368 * Search own LSPs, update holding time and flood
1370 static int lsp_regenerate(struct isis_area
*area
, int level
)
1372 struct lspdb_head
*head
;
1373 struct isis_lsp
*lsp
, *frag
;
1374 struct listnode
*node
;
1375 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
1376 uint16_t rem_lifetime
, refresh_time
;
1378 if ((area
== NULL
) || (area
->is_type
& level
) != level
)
1381 head
= &area
->lspdb
[level
- 1];
1382 memset(lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
1383 memcpy(lspid
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1385 lsp
= lsp_search(head
, lspid
);
1388 flog_err(EC_LIB_DEVELOPMENT
,
1389 "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!",
1390 area
->area_tag
, level
);
1394 lsp_clear_data(lsp
);
1395 lsp_build(lsp
, area
);
1396 rem_lifetime
= lsp_rem_lifetime(area
, level
);
1397 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
1398 lsp
->last_generated
= time(NULL
);
1399 lsp_flood(lsp
, NULL
);
1400 area
->lsp_gen_count
[level
- 1]++;
1401 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
)) {
1403 /* Updating and flooding should only affect fragments
1409 frag
->hdr
.lsp_bits
=
1410 lsp_bits_generate(level
, area
->overload_bit
,
1411 area
->attached_bit_send
, area
);
1412 /* Set the lifetime values of all the fragments to the same
1414 * so that no fragment expires before the lsp is refreshed.
1416 frag
->hdr
.rem_lifetime
= rem_lifetime
;
1417 frag
->age_out
= ZERO_AGE_LIFETIME
;
1418 lsp_flood(frag
, NULL
);
1420 lsp_seqno_update(lsp
);
1422 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1423 thread_add_timer(master
, lsp_refresh
,
1424 &area
->lsp_refresh_arg
[level
- 1], refresh_time
,
1425 &area
->t_lsp_refresh
[level
- 1]);
1426 area
->lsp_regenerate_pending
[level
- 1] = 0;
1428 if (IS_DEBUG_UPDATE_PACKETS
) {
1430 "ISIS-Upd (%s): Refreshed our L%d LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus refresh %hus",
1431 area
->area_tag
, level
, rawlspid_print(lsp
->hdr
.lsp_id
),
1432 lsp
->hdr
.pdu_len
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1433 lsp
->hdr
.rem_lifetime
, refresh_time
);
1436 "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.",
1437 area
->area_tag
, level
);
1443 * Something has changed or periodic refresh -> regenerate LSP
1445 static int lsp_refresh(struct thread
*thread
)
1447 struct lsp_refresh_arg
*arg
= THREAD_ARG(thread
);
1451 struct isis_area
*area
= arg
->area
;
1455 int level
= arg
->level
;
1457 area
->t_lsp_refresh
[level
- 1] = NULL
;
1458 area
->lsp_regenerate_pending
[level
- 1] = 0;
1460 if ((area
->is_type
& level
) == 0)
1464 * Throttle regeneration of LSPs (but not when BFD signalled a 'down'
1467 if (monotime_since(&area
->last_lsp_refresh_event
[level
- 1], NULL
)
1469 && !(area
->bfd_force_spf_refresh
)) {
1470 sched_debug("ISIS (%s): Still unstable, postpone LSP L%d refresh",
1471 area
->area_tag
, level
);
1472 _lsp_regenerate_schedule(area
, level
, 0, false,
1473 __func__
, __FILE__
, __LINE__
);
1478 "ISIS (%s): LSP L%d refresh timer expired. Refreshing LSP...",
1479 area
->area_tag
, level
);
1480 return lsp_regenerate(area
, level
);
1483 int _lsp_regenerate_schedule(struct isis_area
*area
, int level
,
1484 int all_pseudo
, bool postpone
,
1485 const char *func
, const char *file
,
1488 struct isis_lsp
*lsp
;
1489 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1492 struct listnode
*cnode
;
1493 struct isis_circuit
*circuit
;
1500 "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs Caller: %s %s:%d",
1501 area
->area_tag
, circuit_t2string(level
),
1502 all_pseudo
? "" : "not ",
1505 memcpy(id
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1506 LSP_PSEUDO_ID(id
) = LSP_FRAGMENT(id
) = 0;
1509 for (lvl
= IS_LEVEL_1
; lvl
<= IS_LEVEL_2
; lvl
++) {
1510 if (!((level
& lvl
) && (area
->is_type
& lvl
)))
1514 monotime(&area
->last_lsp_refresh_event
[lvl
- 1]);
1518 "ISIS (%s): Checking whether L%d needs to be scheduled",
1519 area
->area_tag
, lvl
);
1521 if (area
->lsp_regenerate_pending
[lvl
- 1]
1522 && !(area
->bfd_signalled_down
)) {
1524 * Note: in case of a BFD 'down' message the refresh is
1525 * scheduled once again just to be sure
1527 struct timeval remain
= thread_timer_remain(
1528 area
->t_lsp_refresh
[lvl
- 1]);
1530 "ISIS (%s): Regeneration is already pending, nothing todo. (Due in %lld.%03lld seconds)",
1531 area
->area_tag
, (long long)remain
.tv_sec
,
1532 (long long)remain
.tv_usec
/ 1000);
1536 lsp
= lsp_search(&area
->lspdb
[lvl
- 1], id
);
1539 "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.",
1545 * Throttle avoidance
1548 "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld",
1549 area
->area_tag
, (long long)lsp
->last_generated
,
1551 thread_cancel(&area
->t_lsp_refresh
[lvl
- 1]);
1552 diff
= now
- lsp
->last_generated
;
1553 if (diff
< area
->lsp_gen_interval
[lvl
- 1]
1554 && !(area
->bfd_signalled_down
)) {
1556 1000 * (area
->lsp_gen_interval
[lvl
- 1] - diff
);
1558 "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval",
1559 area
->area_tag
, timeout
);
1562 * Schedule LSP refresh ASAP
1564 if (area
->bfd_signalled_down
) {
1566 "ISIS (%s): Scheduling immediately due to BFD 'down' message.",
1568 area
->bfd_signalled_down
= false;
1569 area
->bfd_force_spf_refresh
= true;
1572 int64_t time_since_last
= monotime_since(
1573 &area
->last_lsp_refresh_event
[lvl
- 1],
1575 timeout
= time_since_last
< 100000L
1576 ? (100000L - time_since_last
)/1000
1580 "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution in %ld ms due to the instability timer.",
1581 area
->area_tag
, timeout
);
1584 "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution now.",
1589 area
->lsp_regenerate_pending
[lvl
- 1] = 1;
1590 thread_add_timer_msec(master
, lsp_refresh
,
1591 &area
->lsp_refresh_arg
[lvl
- 1],
1593 &area
->t_lsp_refresh
[lvl
- 1]);
1597 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, cnode
, circuit
))
1598 lsp_regenerate_schedule_pseudo(circuit
, level
);
1605 * Funcs for pseudonode LSPs
1609 * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs
1611 static void lsp_build_pseudo(struct isis_lsp
*lsp
, struct isis_circuit
*circuit
,
1614 struct isis_adjacency
*adj
;
1615 struct list
*adj_list
;
1616 struct listnode
*node
;
1617 struct isis_area
*area
= circuit
->area
;
1619 lsp_clear_data(lsp
);
1620 lsp
->tlvs
= isis_alloc_tlvs();
1622 "ISIS (%s): Constructing pseudo LSP %s for interface %s level %d",
1623 area
->area_tag
, rawlspid_print(lsp
->hdr
.lsp_id
),
1624 circuit
->interface
->name
, level
);
1627 /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
1628 lsp
->hdr
.lsp_bits
= lsp_bits_generate(
1629 level
, 0, circuit
->area
->attached_bit_send
, area
);
1632 * add self to IS neighbours
1634 uint8_t ne_id
[ISIS_SYS_ID_LEN
+ 1];
1636 memcpy(ne_id
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1637 LSP_PSEUDO_ID(ne_id
) = 0;
1639 if (circuit
->area
->oldmetric
) {
1640 isis_tlvs_add_oldstyle_reach(lsp
->tlvs
, ne_id
, 0);
1642 "ISIS (%s): Adding %s.%02x as old-style neighbor (self)",
1643 area
->area_tag
, sysid_print(ne_id
),
1644 LSP_PSEUDO_ID(ne_id
));
1646 if (circuit
->area
->newmetric
) {
1647 isis_tlvs_add_extended_reach(lsp
->tlvs
, ISIS_MT_IPV4_UNICAST
,
1650 "ISIS (%s): Adding %s.%02x as te-style neighbor (self)",
1651 area
->area_tag
, sysid_print(ne_id
),
1652 LSP_PSEUDO_ID(ne_id
));
1655 adj_list
= list_new();
1656 isis_adj_build_up_list(circuit
->u
.bc
.adjdb
[level
- 1], adj_list
);
1658 for (ALL_LIST_ELEMENTS_RO(adj_list
, node
, adj
)) {
1659 if (!(adj
->level
& level
)) {
1661 "ISIS (%s): Ignoring neighbor %s, level does not intersect",
1662 area
->area_tag
, sysid_print(adj
->sysid
));
1666 if (!(level
== IS_LEVEL_1
1667 && adj
->sys_type
== ISIS_SYSTYPE_L1_IS
)
1668 && !(level
== IS_LEVEL_1
1669 && adj
->sys_type
== ISIS_SYSTYPE_L2_IS
1670 && adj
->adj_usage
== ISIS_ADJ_LEVEL1AND2
)
1671 && !(level
== IS_LEVEL_2
1672 && adj
->sys_type
== ISIS_SYSTYPE_L2_IS
)) {
1674 "ISIS (%s): Ignoring neighbor %s, level does not match",
1675 area
->area_tag
, sysid_print(adj
->sysid
));
1679 memcpy(ne_id
, adj
->sysid
, ISIS_SYS_ID_LEN
);
1680 if (circuit
->area
->oldmetric
) {
1681 isis_tlvs_add_oldstyle_reach(lsp
->tlvs
, ne_id
, 0);
1683 "ISIS (%s): Adding %s.%02x as old-style neighbor (peer)",
1684 area
->area_tag
, sysid_print(ne_id
),
1685 LSP_PSEUDO_ID(ne_id
));
1687 if (circuit
->area
->newmetric
) {
1688 isis_tlvs_add_extended_reach(lsp
->tlvs
,
1689 ISIS_MT_IPV4_UNICAST
,
1692 "ISIS (%s): Adding %s.%02x as te-style neighbor (peer)",
1693 area
->area_tag
, sysid_print(ne_id
),
1694 LSP_PSEUDO_ID(ne_id
));
1697 list_delete(&adj_list
);
1701 int lsp_generate_pseudo(struct isis_circuit
*circuit
, int level
)
1703 struct lspdb_head
*head
= &circuit
->area
->lspdb
[level
- 1];
1704 struct isis_lsp
*lsp
;
1705 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1706 uint16_t rem_lifetime
, refresh_time
;
1708 if ((circuit
->is_type
& level
) != level
1709 || (circuit
->state
!= C_STATE_UP
)
1710 || (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1711 || (circuit
->u
.bc
.is_dr
[level
- 1] == 0))
1714 memcpy(lsp_id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1715 LSP_FRAGMENT(lsp_id
) = 0;
1716 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1719 * If for some reason have a pseudo LSP in the db already -> regenerate
1721 if (lsp_search(head
, lsp_id
))
1722 return lsp_regenerate_schedule_pseudo(circuit
, level
);
1724 rem_lifetime
= lsp_rem_lifetime(circuit
->area
, level
);
1725 /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
1726 lsp
= lsp_new(circuit
->area
, lsp_id
, rem_lifetime
, 1,
1727 lsp_bits_generate(circuit
->area
->is_type
, 0,
1728 circuit
->area
->attached_bit_send
,
1731 lsp
->area
= circuit
->area
;
1733 lsp_build_pseudo(lsp
, circuit
, level
);
1736 lsp_insert(head
, lsp
);
1737 lsp_flood(lsp
, NULL
);
1739 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1740 thread_cancel(&circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1741 circuit
->lsp_regenerate_pending
[level
- 1] = 0;
1742 if (level
== IS_LEVEL_1
)
1744 master
, lsp_l1_refresh_pseudo
, circuit
, refresh_time
,
1745 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1746 else if (level
== IS_LEVEL_2
)
1748 master
, lsp_l2_refresh_pseudo
, circuit
, refresh_time
,
1749 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1751 if (IS_DEBUG_UPDATE_PACKETS
) {
1753 "ISIS-Upd (%s): Built L%d Pseudo LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus, refresh %hus",
1754 circuit
->area
->area_tag
, level
,
1755 rawlspid_print(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
1756 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1757 lsp
->hdr
.rem_lifetime
, refresh_time
);
1763 static int lsp_regenerate_pseudo(struct isis_circuit
*circuit
, int level
)
1765 struct lspdb_head
*head
= &circuit
->area
->lspdb
[level
- 1];
1766 struct isis_lsp
*lsp
;
1767 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1768 uint16_t rem_lifetime
, refresh_time
;
1770 if ((circuit
->is_type
& level
) != level
1771 || (circuit
->state
!= C_STATE_UP
)
1772 || (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1773 || (circuit
->u
.bc
.is_dr
[level
- 1] == 0))
1776 memcpy(lsp_id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1777 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1778 LSP_FRAGMENT(lsp_id
) = 0;
1780 lsp
= lsp_search(head
, lsp_id
);
1783 flog_err(EC_LIB_DEVELOPMENT
,
1784 "lsp_regenerate_pseudo: no l%d LSP %s found!", level
,
1785 rawlspid_print(lsp_id
));
1789 rem_lifetime
= lsp_rem_lifetime(circuit
->area
, level
);
1790 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
1791 lsp_build_pseudo(lsp
, circuit
, level
);
1792 lsp_inc_seqno(lsp
, 0);
1793 lsp
->last_generated
= time(NULL
);
1794 lsp_flood(lsp
, NULL
);
1796 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1797 if (level
== IS_LEVEL_1
)
1799 master
, lsp_l1_refresh_pseudo
, circuit
, refresh_time
,
1800 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1801 else if (level
== IS_LEVEL_2
)
1803 master
, lsp_l2_refresh_pseudo
, circuit
, refresh_time
,
1804 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1806 if (IS_DEBUG_UPDATE_PACKETS
) {
1808 "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus, refresh %hus",
1809 circuit
->area
->area_tag
, level
,
1810 rawlspid_print(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
1811 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1812 lsp
->hdr
.rem_lifetime
, refresh_time
);
1819 * Something has changed or periodic refresh -> regenerate pseudo LSP
1821 static int lsp_l1_refresh_pseudo(struct thread
*thread
)
1823 struct isis_circuit
*circuit
;
1824 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1826 circuit
= THREAD_ARG(thread
);
1828 circuit
->u
.bc
.t_refresh_pseudo_lsp
[0] = NULL
;
1829 circuit
->lsp_regenerate_pending
[0] = 0;
1831 if ((circuit
->u
.bc
.is_dr
[0] == 0)
1832 || (circuit
->is_type
& IS_LEVEL_1
) == 0) {
1833 memcpy(id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1834 LSP_PSEUDO_ID(id
) = circuit
->circuit_id
;
1835 LSP_FRAGMENT(id
) = 0;
1836 lsp_purge_pseudo(id
, circuit
, IS_LEVEL_1
);
1840 return lsp_regenerate_pseudo(circuit
, IS_LEVEL_1
);
1843 static int lsp_l2_refresh_pseudo(struct thread
*thread
)
1845 struct isis_circuit
*circuit
;
1846 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1848 circuit
= THREAD_ARG(thread
);
1850 circuit
->u
.bc
.t_refresh_pseudo_lsp
[1] = NULL
;
1851 circuit
->lsp_regenerate_pending
[1] = 0;
1853 if ((circuit
->u
.bc
.is_dr
[1] == 0)
1854 || (circuit
->is_type
& IS_LEVEL_2
) == 0) {
1855 memcpy(id
, circuit
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1856 LSP_PSEUDO_ID(id
) = circuit
->circuit_id
;
1857 LSP_FRAGMENT(id
) = 0;
1858 lsp_purge_pseudo(id
, circuit
, IS_LEVEL_2
);
1862 return lsp_regenerate_pseudo(circuit
, IS_LEVEL_2
);
1865 int lsp_regenerate_schedule_pseudo(struct isis_circuit
*circuit
, int level
)
1867 struct isis_lsp
*lsp
;
1868 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1872 struct isis_area
*area
= circuit
->area
;
1874 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
1875 || circuit
->state
!= C_STATE_UP
)
1879 "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s",
1880 area
->area_tag
, circuit_t2string(level
),
1881 circuit
->interface
->name
);
1883 memcpy(lsp_id
, area
->isis
->sysid
, ISIS_SYS_ID_LEN
);
1884 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1885 LSP_FRAGMENT(lsp_id
) = 0;
1888 for (lvl
= IS_LEVEL_1
; lvl
<= IS_LEVEL_2
; lvl
++) {
1890 "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled",
1891 area
->area_tag
, lvl
);
1893 if (!((level
& lvl
) && (circuit
->is_type
& lvl
))) {
1894 sched_debug("ISIS (%s): Level is not active on circuit",
1899 if (circuit
->u
.bc
.is_dr
[lvl
- 1] == 0) {
1901 "ISIS (%s): This IS is not DR, nothing to do.",
1906 if (circuit
->lsp_regenerate_pending
[lvl
- 1]) {
1907 struct timeval remain
= thread_timer_remain(
1908 circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1910 "ISIS (%s): Regenerate is already pending, nothing todo. (Due in %lld.%03lld seconds)",
1911 area
->area_tag
, (long long)remain
.tv_sec
,
1912 (long long)remain
.tv_usec
/ 1000);
1916 lsp
= lsp_search(&circuit
->area
->lspdb
[lvl
- 1], lsp_id
);
1919 "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.",
1925 * Throttle avoidance
1928 "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld",
1929 area
->area_tag
, (long long)lsp
->last_generated
,
1931 thread_cancel(&circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1932 diff
= now
- lsp
->last_generated
;
1933 if (diff
< circuit
->area
->lsp_gen_interval
[lvl
- 1]) {
1935 1000 * (circuit
->area
->lsp_gen_interval
[lvl
- 1]
1938 "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval",
1939 area
->area_tag
, timeout
);
1943 "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution in %ld ms.",
1944 area
->area_tag
, timeout
);
1947 circuit
->lsp_regenerate_pending
[lvl
- 1] = 1;
1949 if (lvl
== IS_LEVEL_1
) {
1950 thread_add_timer_msec(
1951 master
, lsp_l1_refresh_pseudo
, circuit
, timeout
,
1952 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1953 } else if (lvl
== IS_LEVEL_2
) {
1954 thread_add_timer_msec(
1955 master
, lsp_l2_refresh_pseudo
, circuit
, timeout
,
1956 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1964 * Walk through LSPs for an area
1965 * - set remaining lifetime
1967 int lsp_tick(struct thread
*thread
)
1969 struct isis_area
*area
;
1970 struct isis_lsp
*lsp
;
1972 uint16_t rem_lifetime
;
1973 bool fabricd_sync_incomplete
= false;
1975 area
= THREAD_ARG(thread
);
1977 area
->t_tick
= NULL
;
1978 thread_add_timer(master
, lsp_tick
, area
, 1, &area
->t_tick
);
1980 struct isis_circuit
*fabricd_init_c
= fabricd_initial_sync_circuit(area
);
1983 * Remove LSPs which have aged out
1985 for (level
= 0; level
< ISIS_LEVELS
; level
++) {
1986 struct isis_lsp
*next
= lspdb_first(&area
->lspdb
[level
]);
1987 frr_each_from (lspdb
, &area
->lspdb
[level
], lsp
, next
) {
1989 * The lsp rem_lifetime is kept at 0 for MaxAge
1991 * ZeroAgeLifetime depending on explicit purge
1993 * natural age out. So schedule spf only once
1995 * the first time rem_lifetime becomes 0.
1997 rem_lifetime
= lsp
->hdr
.rem_lifetime
;
2001 * Schedule may run spf which should be done
2003 * the lsp rem_lifetime becomes 0 for the first
2005 * ISO 10589 - 7.3.16.4 first paragraph.
2007 if (rem_lifetime
== 1 && lsp
->hdr
.seqno
!= 0) {
2008 /* 7.3.16.4 a) set SRM flags on all */
2009 /* 7.3.16.4 b) retain only the header */
2010 if (lsp
->area
->purge_originator
)
2011 lsp_purge(lsp
, lsp
->level
, NULL
);
2013 lsp_flood(lsp
, NULL
);
2014 /* 7.3.16.4 c) record the time to purge
2016 isis_spf_schedule(lsp
->area
, lsp
->level
);
2019 if (lsp
->age_out
== 0) {
2021 "ISIS-Upd (%s): L%u LSP %s seq 0x%08x aged out",
2022 area
->area_tag
, lsp
->level
,
2023 rawlspid_print(lsp
->hdr
.lsp_id
),
2026 /* if we're aging out fragment 0, lsp_destroy()
2027 * below will delete all other fragments too,
2028 * so we need to skip over those
2030 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
))
2032 !memcmp(next
->hdr
.lsp_id
,
2034 ISIS_SYS_ID_LEN
+ 1))
2036 &area
->lspdb
[level
],
2039 lspdb_del(&area
->lspdb
[level
], lsp
);
2044 if (fabricd_init_c
&& lsp
) {
2045 fabricd_sync_incomplete
|=
2046 ISIS_CHECK_FLAG(lsp
->SSNflags
,
2053 && !fabricd_sync_incomplete
2054 && !isis_tx_queue_len(fabricd_init_c
->tx_queue
)) {
2055 fabricd_initial_sync_finish(area
);
2061 void lsp_purge_pseudo(uint8_t *id
, struct isis_circuit
*circuit
, int level
)
2063 struct isis_lsp
*lsp
;
2065 lsp
= lsp_search(&circuit
->area
->lspdb
[level
- 1], id
);
2069 lsp_purge(lsp
, level
, NULL
);
2073 * Purge own LSP that is received and we don't have.
2074 * -> Do as in 7.3.16.4
2076 void lsp_purge_non_exist(int level
, struct isis_lsp_hdr
*hdr
,
2077 struct isis_area
*area
)
2079 struct isis_lsp
*lsp
;
2082 * We need to create the LSP to be purged
2084 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
2087 lsp_adjust_stream(lsp
);
2088 lsp
->age_out
= ZERO_AGE_LIFETIME
;
2089 lsp
->area
->lsp_purge_count
[level
- 1]++;
2091 memcpy(&lsp
->hdr
, hdr
, sizeof(lsp
->hdr
));
2092 lsp
->hdr
.rem_lifetime
= 0;
2094 lsp_purge_add_poi(lsp
, NULL
);
2098 lsp_insert(&area
->lspdb
[lsp
->level
- 1], lsp
);
2099 lsp_flood(lsp
, NULL
);
2104 void lsp_set_all_srmflags(struct isis_lsp
*lsp
, bool set
)
2106 struct listnode
*node
;
2107 struct isis_circuit
*circuit
;
2114 struct list
*circuit_list
= lsp
->area
->circuit_list
;
2115 for (ALL_LIST_ELEMENTS_RO(circuit_list
, node
, circuit
)) {
2117 isis_tx_queue_add(circuit
->tx_queue
, lsp
,
2120 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
2125 void _lsp_flood(struct isis_lsp
*lsp
, struct isis_circuit
*circuit
,
2126 const char *func
, const char *file
, int line
)
2128 if (IS_DEBUG_FLOODING
) {
2129 zlog_debug("Flooding LSP %s%s%s (From %s %s:%d)",
2130 rawlspid_print(lsp
->hdr
.lsp_id
),
2131 circuit
? " except on " : "",
2132 circuit
? circuit
->interface
->name
: "",
2137 lsp_set_all_srmflags(lsp
, true);
2139 fabricd_lsp_flood(lsp
, circuit
);
2142 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
2145 static int lsp_handle_adj_state_change(struct isis_adjacency
*adj
)
2147 lsp_regenerate_schedule(adj
->circuit
->area
, IS_LEVEL_1
| IS_LEVEL_2
, 0);
2149 /* when an adjacency state changes determine if we need to
2150 * change attach_bits in other area's LSPs
2152 isis_reset_attach_bit(adj
);
2158 * Iterate over all IP reachability TLVs in a LSP (all fragments) of the given
2159 * address-family and MT-ID.
2161 int isis_lsp_iterate_ip_reach(struct isis_lsp
*lsp
, int family
, uint16_t mtid
,
2162 lsp_ip_reach_iter_cb cb
, void *arg
)
2164 bool pseudo_lsp
= LSP_PSEUDO_ID(lsp
->hdr
.lsp_id
);
2165 struct isis_lsp
*frag
;
2166 struct listnode
*node
;
2168 if (lsp
->hdr
.seqno
== 0 || lsp
->hdr
.rem_lifetime
== 0)
2169 return LSP_ITER_CONTINUE
;
2171 /* Parse main LSP. */
2173 if (!fabricd
&& !pseudo_lsp
&& family
== AF_INET
2174 && mtid
== ISIS_MT_IPV4_UNICAST
) {
2175 struct isis_item_list
*reachs
[] = {
2176 &lsp
->tlvs
->oldstyle_ip_reach
,
2177 &lsp
->tlvs
->oldstyle_ip_reach_ext
};
2179 for (unsigned int i
= 0; i
< array_size(reachs
); i
++) {
2180 struct isis_oldstyle_ip_reach
*r
;
2182 for (r
= (struct isis_oldstyle_ip_reach
*)
2186 bool external
= i
? true : false;
2188 if ((*cb
)((struct prefix
*)&r
->prefix
,
2189 r
->metric
, external
, NULL
,
2192 return LSP_ITER_STOP
;
2197 if (!pseudo_lsp
&& family
== AF_INET
) {
2198 struct isis_item_list
*ipv4_reachs
;
2200 if (mtid
== ISIS_MT_IPV4_UNICAST
)
2201 ipv4_reachs
= &lsp
->tlvs
->extended_ip_reach
;
2203 ipv4_reachs
= isis_lookup_mt_items(
2204 &lsp
->tlvs
->mt_ip_reach
, mtid
);
2206 struct isis_extended_ip_reach
*r
;
2207 for (r
= ipv4_reachs
? (struct isis_extended_ip_reach
*)
2211 if ((*cb
)((struct prefix
*)&r
->prefix
,
2212 r
->metric
, false, r
->subtlvs
, arg
)
2214 return LSP_ITER_STOP
;
2218 if (!pseudo_lsp
&& family
== AF_INET6
) {
2219 struct isis_item_list
*ipv6_reachs
;
2220 struct isis_ipv6_reach
*r
;
2222 if (mtid
== ISIS_MT_IPV4_UNICAST
)
2223 ipv6_reachs
= &lsp
->tlvs
->ipv6_reach
;
2225 ipv6_reachs
= isis_lookup_mt_items(
2226 &lsp
->tlvs
->mt_ipv6_reach
, mtid
);
2228 for (r
= ipv6_reachs
? (struct isis_ipv6_reach
*)
2232 if ((*cb
)((struct prefix
*)&r
->prefix
,
2233 r
->metric
, r
->external
, r
->subtlvs
,
2236 return LSP_ITER_STOP
;
2241 /* Parse LSP fragments. */
2242 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
)) {
2246 isis_lsp_iterate_ip_reach(frag
, family
, mtid
, cb
, arg
);
2249 return LSP_ITER_CONTINUE
;
2253 * Iterate over all IS reachability TLVs in a LSP (all fragments) of the given
2256 int isis_lsp_iterate_is_reach(struct isis_lsp
*lsp
, uint16_t mtid
,
2257 lsp_is_reach_iter_cb cb
, void *arg
)
2259 bool pseudo_lsp
= LSP_PSEUDO_ID(lsp
->hdr
.lsp_id
);
2260 struct isis_lsp
*frag
;
2261 struct listnode
*node
;
2262 struct isis_item
*head
;
2263 struct isis_item_list
*te_neighs
;
2265 if (lsp
->hdr
.seqno
== 0 || lsp
->hdr
.rem_lifetime
== 0)
2266 return LSP_ITER_CONTINUE
;
2268 /* Parse main LSP. */
2270 if (pseudo_lsp
|| mtid
== ISIS_MT_IPV4_UNICAST
) {
2271 head
= lsp
->tlvs
->oldstyle_reach
.head
;
2272 for (struct isis_oldstyle_reach
*reach
=
2273 (struct isis_oldstyle_reach
*)head
;
2274 reach
; reach
= reach
->next
) {
2275 if ((*cb
)(reach
->id
, reach
->metric
, true, NULL
,
2278 return LSP_ITER_STOP
;
2282 if (pseudo_lsp
|| mtid
== ISIS_MT_IPV4_UNICAST
)
2283 te_neighs
= &lsp
->tlvs
->extended_reach
;
2286 isis_get_mt_items(&lsp
->tlvs
->mt_reach
, mtid
);
2288 head
= te_neighs
->head
;
2289 for (struct isis_extended_reach
*reach
=
2290 (struct isis_extended_reach
*)head
;
2291 reach
; reach
= reach
->next
) {
2292 if ((*cb
)(reach
->id
, reach
->metric
, false,
2293 reach
->subtlvs
, arg
)
2295 return LSP_ITER_STOP
;
2300 /* Parse LSP fragments. */
2301 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
)) {
2305 isis_lsp_iterate_is_reach(frag
, mtid
, cb
, arg
);
2308 return LSP_ITER_CONTINUE
;
2313 hook_register(isis_adj_state_change_hook
,
2314 lsp_handle_adj_state_change
);