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git.proxmox.com Git - mirror_frr.git/blob - isisd/isis_lsp.c
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/dict.h"
44 #include "isisd/isis_constants.h"
45 #include "isisd/isis_common.h"
46 #include "isisd/isis_flags.h"
47 #include "isisd/isis_circuit.h"
48 #include "isisd/isisd.h"
49 #include "isisd/isis_lsp.h"
50 #include "isisd/isis_pdu.h"
51 #include "isisd/isis_dynhn.h"
52 #include "isisd/isis_misc.h"
53 #include "isisd/isis_csm.h"
54 #include "isisd/isis_adjacency.h"
55 #include "isisd/isis_spf.h"
56 #include "isisd/isis_te.h"
57 #include "isisd/isis_mt.h"
58 #include "isisd/isis_tlvs.h"
59 #include "isisd/fabricd.h"
60 #include "isisd/isis_tx_queue.h"
62 static int lsp_l1_refresh(struct thread
*thread
);
63 static int lsp_l2_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 int lsp_id_cmp(uint8_t *id1
, uint8_t *id2
)
69 return memcmp(id1
, id2
, ISIS_SYS_ID_LEN
+ 2);
72 dict_t
*lsp_db_init(void)
76 dict
= dict_create(DICTCOUNT_T_MAX
, (dict_comp_t
)lsp_id_cmp
);
81 struct isis_lsp
*lsp_search(uint8_t *id
, dict_t
*lspdb
)
88 zlog_debug("searching db");
89 for (dn
= dict_first(lspdb
); dn
; dn
= dict_next(lspdb
, dn
)) {
91 rawlspid_print((uint8_t *)dnode_getkey(dn
)),
94 #endif /* EXTREME DEBUG */
96 node
= dict_lookup(lspdb
, id
);
99 return (struct isis_lsp
*)dnode_get(node
);
104 static void lsp_clear_data(struct isis_lsp
*lsp
)
109 isis_free_tlvs(lsp
->tlvs
);
113 static void lsp_destroy(struct isis_lsp
*lsp
)
115 struct listnode
*cnode
;
116 struct isis_circuit
*circuit
;
121 for (ALL_LIST_ELEMENTS_RO(lsp
->area
->circuit_list
, cnode
, circuit
))
122 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
124 ISIS_FLAGS_CLEAR_ALL(lsp
->SSNflags
);
128 if (LSP_FRAGMENT(lsp
->hdr
.lsp_id
) == 0 && lsp
->lspu
.frags
) {
129 list_delete(&lsp
->lspu
.frags
);
130 lsp
->lspu
.frags
= NULL
;
133 isis_spf_schedule(lsp
->area
, lsp
->level
);
136 stream_free(lsp
->pdu
);
137 XFREE(MTYPE_ISIS_LSP
, lsp
);
140 void lsp_db_destroy(dict_t
*lspdb
)
142 dnode_t
*dnode
, *next
;
143 struct isis_lsp
*lsp
;
145 dnode
= dict_first(lspdb
);
147 next
= dict_next(lspdb
, dnode
);
148 lsp
= dnode_get(dnode
);
150 dict_delete_free(lspdb
, dnode
);
160 * Remove all the frags belonging to the given lsp
162 static void lsp_remove_frags(struct list
*frags
, dict_t
*lspdb
)
165 struct listnode
*lnode
, *lnnode
;
166 struct isis_lsp
*lsp
;
168 for (ALL_LIST_ELEMENTS(frags
, lnode
, lnnode
, lsp
)) {
169 dnode
= dict_lookup(lspdb
, lsp
->hdr
.lsp_id
);
171 dnode_destroy(dict_delete(lspdb
, dnode
));
174 list_delete_all_node(frags
);
179 void lsp_search_and_destroy(uint8_t *id
, dict_t
*lspdb
)
182 struct isis_lsp
*lsp
;
184 node
= dict_lookup(lspdb
, id
);
186 node
= dict_delete(lspdb
, node
);
187 lsp
= dnode_get(node
);
189 * If this is a zero lsp, remove all the frags now
191 if (LSP_FRAGMENT(lsp
->hdr
.lsp_id
) == 0) {
193 lsp_remove_frags(lsp
->lspu
.frags
, lspdb
);
196 * else just remove this frag, from the zero lsps' frag
199 if (lsp
->lspu
.zero_lsp
200 && lsp
->lspu
.zero_lsp
->lspu
.frags
)
201 listnode_delete(lsp
->lspu
.zero_lsp
->lspu
.frags
,
210 * Compares a LSP to given values
211 * Params are given in net order
213 int lsp_compare(char *areatag
, struct isis_lsp
*lsp
, uint32_t seqno
,
214 uint16_t checksum
, uint16_t rem_lifetime
)
216 if (lsp
->hdr
.seqno
== seqno
&& lsp
->hdr
.checksum
== checksum
217 && ((lsp
->hdr
.rem_lifetime
== 0 && rem_lifetime
== 0)
218 || (lsp
->hdr
.rem_lifetime
!= 0 && rem_lifetime
!= 0))) {
219 if (isis
->debugs
& DEBUG_SNP_PACKETS
) {
221 "ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32
222 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
224 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
),
225 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
226 lsp
->hdr
.rem_lifetime
);
228 "ISIS-Snp (%s): is equal to ours seq 0x%08" PRIx32
229 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
231 areatag
, seqno
, checksum
, rem_lifetime
);
237 * LSPs with identical checksums should only be treated as newer if:
238 * a) The current LSP has a remaining lifetime != 0 and the other LSP
240 * remaining lifetime == 0. In this case, we should participate in
242 * and should not treat the current LSP with remaining lifetime == 0
244 * b) The LSP has an incorrect checksum. In this case, we need to react
248 if (seqno
> lsp
->hdr
.seqno
249 || (seqno
== lsp
->hdr
.seqno
250 && ((lsp
->hdr
.rem_lifetime
!= 0 && rem_lifetime
== 0)
251 || lsp
->hdr
.checksum
!= checksum
))) {
252 if (isis
->debugs
& DEBUG_SNP_PACKETS
) {
254 "ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32
255 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
257 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
), seqno
,
258 checksum
, rem_lifetime
);
260 "ISIS-Snp (%s): is newer than ours seq 0x%08" PRIx32
261 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
263 areatag
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
264 lsp
->hdr
.rem_lifetime
);
268 if (isis
->debugs
& DEBUG_SNP_PACKETS
) {
269 zlog_debug("ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32
270 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
"s",
271 areatag
, rawlspid_print(lsp
->hdr
.lsp_id
), seqno
,
272 checksum
, rem_lifetime
);
274 "ISIS-Snp (%s): is older than ours seq 0x%08" PRIx32
275 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
"s",
276 areatag
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
277 lsp
->hdr
.rem_lifetime
);
283 static void put_lsp_hdr(struct isis_lsp
*lsp
, size_t *len_pointer
, bool keep
)
286 (lsp
->level
== IS_LEVEL_1
) ? L1_LINK_STATE
: L2_LINK_STATE
;
287 struct isis_lsp_hdr
*hdr
= &lsp
->hdr
;
288 struct stream
*stream
= lsp
->pdu
;
289 size_t orig_getp
= 0, orig_endp
= 0;
292 orig_getp
= stream_get_getp(lsp
->pdu
);
293 orig_endp
= stream_get_endp(lsp
->pdu
);
296 stream_set_getp(lsp
->pdu
, 0);
297 stream_set_endp(lsp
->pdu
, 0);
299 fill_fixed_hdr(pdu_type
, stream
);
302 *len_pointer
= stream_get_endp(stream
);
303 stream_putw(stream
, hdr
->pdu_len
);
304 stream_putw(stream
, hdr
->rem_lifetime
);
305 stream_put(stream
, hdr
->lsp_id
, sizeof(hdr
->lsp_id
));
306 stream_putl(stream
, hdr
->seqno
);
307 stream_putw(stream
, hdr
->checksum
);
308 stream_putc(stream
, hdr
->lsp_bits
);
311 stream_set_endp(lsp
->pdu
, orig_endp
);
312 stream_set_getp(lsp
->pdu
, orig_getp
);
316 static void lsp_add_auth(struct isis_lsp
*lsp
)
318 struct isis_passwd
*passwd
;
319 passwd
= (lsp
->level
== IS_LEVEL_1
) ? &lsp
->area
->area_passwd
320 : &lsp
->area
->domain_passwd
;
321 isis_tlvs_add_auth(lsp
->tlvs
, passwd
);
324 static void lsp_pack_pdu(struct isis_lsp
*lsp
)
327 lsp
->tlvs
= isis_alloc_tlvs();
332 put_lsp_hdr(lsp
, &len_pointer
, false);
333 isis_pack_tlvs(lsp
->tlvs
, lsp
->pdu
, len_pointer
, false, true);
335 lsp
->hdr
.pdu_len
= stream_get_endp(lsp
->pdu
);
337 ntohs(fletcher_checksum(STREAM_DATA(lsp
->pdu
) + 12,
338 stream_get_endp(lsp
->pdu
) - 12, 12));
341 void lsp_inc_seqno(struct isis_lsp
*lsp
, uint32_t seqno
)
345 if (seqno
== 0 || lsp
->hdr
.seqno
> seqno
)
346 newseq
= lsp
->hdr
.seqno
+ 1;
350 lsp
->hdr
.seqno
= newseq
;
353 isis_spf_schedule(lsp
->area
, lsp
->level
);
356 static void lsp_purge_add_poi(struct isis_lsp
*lsp
,
357 const uint8_t *sender
)
359 if (!lsp
->area
->purge_originator
)
362 /* add purge originator identification */
364 lsp
->tlvs
= isis_alloc_tlvs();
365 isis_tlvs_set_purge_originator(lsp
->tlvs
, isis
->sysid
, sender
);
366 isis_tlvs_set_dynamic_hostname(lsp
->tlvs
, cmd_hostname_get());
369 static void lsp_purge(struct isis_lsp
*lsp
, int level
,
370 const uint8_t *sender
)
374 stream_reset(lsp
->pdu
);
377 lsp
->hdr
.checksum
= 0;
378 lsp
->hdr
.rem_lifetime
= 0;
380 lsp
->age_out
= lsp
->area
->max_lsp_lifetime
[level
- 1];
382 lsp_purge_add_poi(lsp
, sender
);
385 lsp_flood(lsp
, NULL
);
389 * Generates checksum for LSP and its frags
391 static void lsp_seqno_update(struct isis_lsp
*lsp0
)
393 struct isis_lsp
*lsp
;
394 struct listnode
*node
;
396 lsp_inc_seqno(lsp0
, 0);
398 if (!lsp0
->lspu
.frags
)
401 for (ALL_LIST_ELEMENTS_RO(lsp0
->lspu
.frags
, node
, lsp
)) {
403 lsp_inc_seqno(lsp
, 0);
405 lsp_purge(lsp
, lsp0
->level
, NULL
);
411 static uint8_t lsp_bits_generate(int level
, int overload_bit
, int attached_bit
)
413 uint8_t lsp_bits
= 0;
414 if (level
== IS_LEVEL_1
)
415 lsp_bits
= IS_LEVEL_1
;
417 lsp_bits
= IS_LEVEL_1_AND_2
;
419 lsp_bits
|= overload_bit
;
421 lsp_bits
|= attached_bit
;
425 static void lsp_update_data(struct isis_lsp
*lsp
, struct isis_lsp_hdr
*hdr
,
426 struct isis_tlvs
*tlvs
, struct stream
*stream
,
427 struct isis_area
*area
, int level
)
429 /* free the old lsp data */
432 /* copying only the relevant part of our stream */
433 if (lsp
->pdu
!= NULL
)
434 stream_free(lsp
->pdu
);
435 lsp
->pdu
= stream_dup(stream
);
437 memcpy(&lsp
->hdr
, hdr
, sizeof(lsp
->hdr
));
440 lsp
->age_out
= ZERO_AGE_LIFETIME
;
441 lsp
->installed
= time(NULL
);
445 if (area
->dynhostname
&& lsp
->tlvs
->hostname
446 && lsp
->hdr
.rem_lifetime
) {
447 isis_dynhn_insert(lsp
->hdr
.lsp_id
, lsp
->tlvs
->hostname
,
448 (lsp
->hdr
.lsp_bits
& LSPBIT_IST
)
457 static void lsp_link_fragment(struct isis_lsp
*lsp
, struct isis_lsp
*lsp0
)
459 if (!LSP_FRAGMENT(lsp
->hdr
.lsp_id
)) {
460 /* zero lsp -> create list to store fragments */
461 lsp
->lspu
.frags
= list_new();
463 /* fragment -> set backpointer and add to zero lsps list */
465 lsp
->lspu
.zero_lsp
= lsp0
;
466 listnode_add(lsp0
->lspu
.frags
, lsp
);
470 void lsp_update(struct isis_lsp
*lsp
, struct isis_lsp_hdr
*hdr
,
471 struct isis_tlvs
*tlvs
, struct stream
*stream
,
472 struct isis_area
*area
, int level
, bool confusion
)
477 "ISIS-Upd (%s): BUG updating LSP %s still marked as own LSP",
478 area
->area_tag
, rawlspid_print(lsp
->hdr
.lsp_id
));
484 lsp_purge(lsp
, level
, NULL
);
486 lsp_update_data(lsp
, hdr
, tlvs
, stream
, area
, level
);
489 if (LSP_FRAGMENT(lsp
->hdr
.lsp_id
) && !lsp
->lspu
.zero_lsp
) {
490 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
491 struct isis_lsp
*lsp0
;
493 memcpy(lspid
, lsp
->hdr
.lsp_id
, ISIS_SYS_ID_LEN
+ 1);
494 LSP_FRAGMENT(lspid
) = 0;
495 lsp0
= lsp_search(lspid
, area
->lspdb
[level
- 1]);
497 lsp_link_fragment(lsp
, lsp0
);
501 isis_spf_schedule(lsp
->area
, lsp
->level
);
504 /* creation of LSP directly from what we received */
505 struct isis_lsp
*lsp_new_from_recv(struct isis_lsp_hdr
*hdr
,
506 struct isis_tlvs
*tlvs
,
507 struct stream
*stream
, struct isis_lsp
*lsp0
,
508 struct isis_area
*area
, int level
)
510 struct isis_lsp
*lsp
;
512 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
513 lsp_update_data(lsp
, hdr
, tlvs
, stream
, area
, level
);
514 lsp_link_fragment(lsp
, lsp0
);
519 struct isis_lsp
*lsp_new(struct isis_area
*area
, uint8_t *lsp_id
,
520 uint16_t rem_lifetime
, uint32_t seqno
,
521 uint8_t lsp_bits
, uint16_t checksum
,
522 struct isis_lsp
*lsp0
, int level
)
524 struct isis_lsp
*lsp
;
526 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
529 lsp
->pdu
= stream_new(LLC_LEN
+ area
->lsp_mtu
);
531 /* Minimal LSP PDU size */
532 lsp
->hdr
.pdu_len
= ISIS_FIXED_HDR_LEN
+ ISIS_LSP_HDR_LEN
;
533 memcpy(lsp
->hdr
.lsp_id
, lsp_id
, sizeof(lsp
->hdr
.lsp_id
));
534 lsp
->hdr
.checksum
= checksum
;
535 lsp
->hdr
.seqno
= seqno
;
536 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
537 lsp
->hdr
.lsp_bits
= lsp_bits
;
539 lsp
->age_out
= ZERO_AGE_LIFETIME
;
540 lsp_link_fragment(lsp
, lsp0
);
541 put_lsp_hdr(lsp
, NULL
, false);
543 if (isis
->debugs
& DEBUG_EVENTS
)
544 zlog_debug("New LSP with ID %s-%02x-%02x len %d seqnum %08x",
545 sysid_print(lsp_id
), LSP_PSEUDO_ID(lsp
->hdr
.lsp_id
),
546 LSP_FRAGMENT(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
552 void lsp_insert(struct isis_lsp
*lsp
, dict_t
*lspdb
)
554 dict_alloc_insert(lspdb
, lsp
->hdr
.lsp_id
, lsp
);
556 isis_spf_schedule(lsp
->area
, lsp
->level
);
560 * Build a list of LSPs with non-zero ht bounded by start and stop ids
562 void lsp_build_list_nonzero_ht(uint8_t *start_id
, uint8_t *stop_id
,
563 struct list
*list
, dict_t
*lspdb
)
565 dnode_t
*first
, *last
, *curr
;
567 first
= dict_lower_bound(lspdb
, start_id
);
571 last
= dict_upper_bound(lspdb
, stop_id
);
575 if (((struct isis_lsp
*)(curr
->dict_data
))->hdr
.rem_lifetime
)
576 listnode_add(list
, first
->dict_data
);
579 curr
= dict_next(lspdb
, curr
);
581 && ((struct isis_lsp
*)(curr
->dict_data
))->hdr
.rem_lifetime
)
582 listnode_add(list
, curr
->dict_data
);
590 static void lsp_set_time(struct isis_lsp
*lsp
)
594 if (lsp
->hdr
.rem_lifetime
== 0) {
595 if (lsp
->age_out
> 0)
600 lsp
->hdr
.rem_lifetime
--;
601 if (lsp
->pdu
&& stream_get_endp(lsp
->pdu
) >= 12)
602 stream_putw_at(lsp
->pdu
, 10, lsp
->hdr
.rem_lifetime
);
605 static void lspid_print(uint8_t *lsp_id
, uint8_t *trg
, char dynhost
, char frag
)
607 struct isis_dynhn
*dyn
= NULL
;
608 uint8_t id
[SYSID_STRLEN
];
611 dyn
= dynhn_find_by_id(lsp_id
);
616 sprintf((char *)id
, "%.14s", dyn
->hostname
);
617 else if (!memcmp(isis
->sysid
, lsp_id
, ISIS_SYS_ID_LEN
) && dynhost
)
618 sprintf((char *)id
, "%.14s", cmd_hostname_get());
620 memcpy(id
, sysid_print(lsp_id
), 15);
622 sprintf((char *)trg
, "%s.%02x-%02x", id
, LSP_PSEUDO_ID(lsp_id
),
623 LSP_FRAGMENT(lsp_id
));
625 sprintf((char *)trg
, "%s.%02x", id
, LSP_PSEUDO_ID(lsp_id
));
628 /* Convert the lsp attribute bits to attribute string */
629 static const char *lsp_bits2string(uint8_t lsp_bits
, char *buf
, size_t buf_size
)
636 if (buf_size
< 2 * 3)
639 /* we only focus on the default metric */
640 pos
+= sprintf(pos
, "%d/",
641 ISIS_MASK_LSP_ATT_DEFAULT_BIT(lsp_bits
) ? 1 : 0);
643 pos
+= sprintf(pos
, "%d/",
644 ISIS_MASK_LSP_PARTITION_BIT(lsp_bits
) ? 1 : 0);
646 sprintf(pos
, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits
) ? 1 : 0);
651 /* this function prints the lsp on show isis database */
652 void lsp_print(struct isis_lsp
*lsp
, struct vty
*vty
, char dynhost
)
658 lspid_print(lsp
->hdr
.lsp_id
, LSPid
, dynhost
, 1);
659 vty_out(vty
, "%-21s%c ", LSPid
, lsp
->own_lsp
? '*' : ' ');
660 vty_out(vty
, "%5" PRIu16
" ", lsp
->hdr
.pdu_len
);
661 vty_out(vty
, "0x%08" PRIx32
" ", lsp
->hdr
.seqno
);
662 vty_out(vty
, "0x%04" PRIx16
" ", lsp
->hdr
.checksum
);
663 if (lsp
->hdr
.rem_lifetime
== 0) {
664 snprintf(age_out
, 8, "(%d)", lsp
->age_out
);
666 vty_out(vty
, "%7s ", age_out
);
668 vty_out(vty
, " %5" PRIu16
" ", lsp
->hdr
.rem_lifetime
);
669 vty_out(vty
, "%s\n", lsp_bits2string(lsp
->hdr
.lsp_bits
, b
, sizeof(b
)));
672 void lsp_print_detail(struct isis_lsp
*lsp
, struct vty
*vty
, char dynhost
)
674 lsp_print(lsp
, vty
, dynhost
);
676 vty_multiline(vty
, " ", "%s", isis_format_tlvs(lsp
->tlvs
));
680 /* print all the lsps info in the local lspdb */
681 int lsp_print_all(struct vty
*vty
, dict_t
*lspdb
, char detail
, char dynhost
)
684 dnode_t
*node
= dict_first(lspdb
), *next
;
687 if (detail
== ISIS_UI_LEVEL_BRIEF
) {
688 while (node
!= NULL
) {
689 /* I think it is unnecessary, so I comment it out */
690 /* dict_contains (lspdb, node); */
691 next
= dict_next(lspdb
, node
);
692 lsp_print(dnode_get(node
), vty
, dynhost
);
696 } else if (detail
== ISIS_UI_LEVEL_DETAIL
) {
697 while (node
!= NULL
) {
698 next
= dict_next(lspdb
, node
);
699 lsp_print_detail(dnode_get(node
), vty
, dynhost
);
708 static uint16_t lsp_rem_lifetime(struct isis_area
*area
, int level
)
710 uint16_t rem_lifetime
;
712 /* Add jitter to configured LSP lifetime */
714 isis_jitter(area
->max_lsp_lifetime
[level
- 1], MAX_AGE_JITTER
);
716 /* No jitter if the max refresh will be less than configure gen interval
718 /* N.B. this calucation is acceptable since rem_lifetime is in
721 if (area
->lsp_gen_interval
[level
- 1] > (rem_lifetime
- 300))
722 rem_lifetime
= area
->max_lsp_lifetime
[level
- 1];
727 static uint16_t lsp_refresh_time(struct isis_lsp
*lsp
, uint16_t rem_lifetime
)
729 struct isis_area
*area
= lsp
->area
;
730 int level
= lsp
->level
;
731 uint16_t refresh_time
;
733 /* Add jitter to LSP refresh time */
735 isis_jitter(area
->lsp_refresh
[level
- 1], MAX_LSP_GEN_JITTER
);
737 /* RFC 4444 : make sure the refresh time is at least less than 300
738 * of the remaining lifetime and more than gen interval */
739 if (refresh_time
<= area
->lsp_gen_interval
[level
- 1]
740 || refresh_time
> (rem_lifetime
- 300))
741 refresh_time
= rem_lifetime
- 300;
743 /* In cornercases, refresh_time might be <= lsp_gen_interval, however
744 * we accept this violation to satisfy refresh_time <= rem_lifetime -
750 static void lsp_build_ext_reach_ipv4(struct isis_lsp
*lsp
,
751 struct isis_area
*area
)
753 struct route_table
*er_table
= get_ext_reach(area
, AF_INET
, lsp
->level
);
757 for (struct route_node
*rn
= route_top(er_table
); rn
;
758 rn
= route_next(rn
)) {
762 struct prefix_ipv4
*ipv4
= (struct prefix_ipv4
*)&rn
->p
;
763 struct isis_ext_info
*info
= rn
->info
;
765 uint32_t metric
= info
->metric
;
766 if (metric
> MAX_WIDE_PATH_METRIC
)
767 metric
= MAX_WIDE_PATH_METRIC
;
768 if (area
->oldmetric
&& metric
> 0x3f)
772 isis_tlvs_add_oldstyle_ip_reach(lsp
->tlvs
, ipv4
,
775 isis_tlvs_add_extended_ip_reach(lsp
->tlvs
, ipv4
,
780 static void lsp_build_ext_reach_ipv6(struct isis_lsp
*lsp
,
781 struct isis_area
*area
)
783 struct route_table
*er_table
=
784 get_ext_reach(area
, AF_INET6
, lsp
->level
);
788 for (struct route_node
*rn
= route_top(er_table
); rn
;
789 rn
= srcdest_route_next(rn
)) {
792 struct isis_ext_info
*info
= rn
->info
;
794 struct prefix_ipv6
*p
, *src_p
;
795 srcdest_rnode_prefixes(rn
, (const struct prefix
**)&p
,
796 (const struct prefix
**)&src_p
);
798 uint32_t metric
= info
->metric
;
799 if (info
->metric
> MAX_WIDE_PATH_METRIC
)
800 metric
= MAX_WIDE_PATH_METRIC
;
802 if (!src_p
|| !src_p
->prefixlen
) {
803 isis_tlvs_add_ipv6_reach(lsp
->tlvs
,
804 isis_area_ipv6_topology(area
),
806 } else if (isis_area_ipv6_dstsrc_enabled(area
)) {
807 isis_tlvs_add_ipv6_dstsrc_reach(lsp
->tlvs
,
814 static void lsp_build_ext_reach(struct isis_lsp
*lsp
, struct isis_area
*area
)
816 lsp_build_ext_reach_ipv4(lsp
, area
);
817 lsp_build_ext_reach_ipv6(lsp
, area
);
820 static struct isis_lsp
*lsp_next_frag(uint8_t frag_num
, struct isis_lsp
*lsp0
,
821 struct isis_area
*area
, int level
)
823 struct isis_lsp
*lsp
;
824 uint8_t frag_id
[ISIS_SYS_ID_LEN
+ 2];
826 memcpy(frag_id
, lsp0
->hdr
.lsp_id
, ISIS_SYS_ID_LEN
+ 1);
827 LSP_FRAGMENT(frag_id
) = frag_num
;
829 lsp
= lsp_search(frag_id
, area
->lspdb
[level
- 1]);
832 if (!lsp
->lspu
.zero_lsp
)
833 lsp_link_fragment(lsp
, lsp0
);
837 lsp
= lsp_new(area
, frag_id
, lsp0
->hdr
.rem_lifetime
, 0,
838 lsp_bits_generate(level
, area
->overload_bit
,
842 lsp_insert(lsp
, area
->lspdb
[level
- 1]);
847 * Builds the LSP data part. This func creates a new frag whenever
848 * area->lsp_frag_threshold is exceeded.
850 static void lsp_build(struct isis_lsp
*lsp
, struct isis_area
*area
)
852 int level
= lsp
->level
;
853 char buf
[PREFIX2STR_BUFFER
];
854 struct listnode
*node
;
855 struct isis_lsp
*frag
;
858 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
))
859 lsp_clear_data(frag
);
861 lsp
->tlvs
= isis_alloc_tlvs();
862 lsp_debug("ISIS (%s): Constructing local system LSP for level %d",
863 area
->area_tag
, level
);
865 lsp
->hdr
.lsp_bits
= lsp_bits_generate(level
, area
->overload_bit
,
870 isis_tlvs_add_area_addresses(lsp
->tlvs
, area
->area_addrs
);
872 /* Protocols Supported */
873 if (area
->ip_circuits
> 0 || area
->ipv6_circuits
> 0) {
874 struct nlpids nlpids
= {.count
= 0};
875 if (area
->ip_circuits
> 0) {
877 "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs",
879 nlpids
.nlpids
[nlpids
.count
] = NLPID_IP
;
882 if (area
->ipv6_circuits
> 0) {
884 "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs",
886 nlpids
.nlpids
[nlpids
.count
] = NLPID_IPV6
;
889 isis_tlvs_set_protocols_supported(lsp
->tlvs
, &nlpids
);
892 if (area_is_mt(area
)) {
893 lsp_debug("ISIS (%s): Adding MT router tlv...", area
->area_tag
);
895 struct isis_area_mt_setting
**mt_settings
;
896 unsigned int mt_count
;
898 mt_settings
= area_mt_settings(area
, &mt_count
);
899 for (unsigned int i
= 0; i
< mt_count
; i
++) {
900 isis_tlvs_add_mt_router_info(
901 lsp
->tlvs
, mt_settings
[i
]->mtid
,
902 mt_settings
[i
]->overload
, false);
903 lsp_debug("ISIS (%s): MT %s", area
->area_tag
,
904 isis_mtid2str(mt_settings
[i
]->mtid
));
907 lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)",
910 /* Dynamic Hostname */
911 if (area
->dynhostname
) {
912 isis_tlvs_set_dynamic_hostname(lsp
->tlvs
, cmd_hostname_get());
913 lsp_debug("ISIS (%s): Adding dynamic hostname '%s'",
914 area
->area_tag
, cmd_hostname_get());
916 lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)",
920 /* IPv4 address and TE router ID TLVs. In case of the first one we don't
921 * follow "C" vendor, but "J" vendor behavior - one IPv4 address is put
923 * LSP and this address is same as router id. */
924 if (isis
->router_id
!= 0) {
925 struct in_addr id
= {.s_addr
= isis
->router_id
};
926 inet_ntop(AF_INET
, &id
, buf
, sizeof(buf
));
927 lsp_debug("ISIS (%s): Adding router ID %s as IPv4 tlv.",
928 area
->area_tag
, buf
);
929 isis_tlvs_add_ipv4_address(lsp
->tlvs
, &id
);
931 /* Exactly same data is put into TE router ID TLV, but only if
933 * TLV's are in use. */
934 if (area
->newmetric
) {
937 "ISIS (%s): Adding router ID also as TE router ID tlv.",
939 isis_tlvs_set_te_router_id(lsp
->tlvs
, &id
);
942 lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.",
946 lsp_debug("ISIS (%s): Adding circuit specific information.",
951 "ISIS (%s): Adding tier %" PRIu8
" spine-leaf-extension tlv.",
952 area
->area_tag
, fabricd_tier(area
));
953 isis_tlvs_add_spine_leaf(lsp
->tlvs
, fabricd_tier(area
), true,
954 false, false, false);
957 struct isis_circuit
*circuit
;
958 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, node
, circuit
)) {
959 if (!circuit
->interface
)
961 "ISIS (%s): Processing %s circuit %p with unknown interface",
963 circuit_type2string(circuit
->circ_type
),
966 lsp_debug("ISIS (%s): Processing %s circuit %s",
968 circuit_type2string(circuit
->circ_type
),
969 circuit
->interface
->name
);
971 if (circuit
->state
!= C_STATE_UP
) {
972 lsp_debug("ISIS (%s): Circuit is not up, ignoring.",
977 uint32_t metric
= area
->oldmetric
978 ? circuit
->metric
[level
- 1]
979 : circuit
->te_metric
[level
- 1];
981 if (circuit
->ip_router
&& circuit
->ip_addrs
982 && circuit
->ip_addrs
->count
> 0) {
984 "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.",
986 struct listnode
*ipnode
;
987 struct prefix_ipv4
*ipv4
;
988 for (ALL_LIST_ELEMENTS_RO(circuit
->ip_addrs
, ipnode
,
990 if (area
->oldmetric
) {
992 "ISIS (%s): Adding old-style IP reachability for %s",
994 prefix2str(ipv4
, buf
,
996 isis_tlvs_add_oldstyle_ip_reach(
997 lsp
->tlvs
, ipv4
, metric
);
1000 if (area
->newmetric
) {
1002 "ISIS (%s): Adding te-style IP reachability for %s",
1004 prefix2str(ipv4
, buf
,
1006 isis_tlvs_add_extended_ip_reach(
1007 lsp
->tlvs
, ipv4
, metric
);
1012 if (circuit
->ipv6_router
&& circuit
->ipv6_non_link
1013 && circuit
->ipv6_non_link
->count
> 0) {
1014 struct listnode
*ipnode
;
1015 struct prefix_ipv6
*ipv6
;
1016 for (ALL_LIST_ELEMENTS_RO(circuit
->ipv6_non_link
,
1019 "ISIS (%s): Adding IPv6 reachability for %s",
1021 prefix2str(ipv6
, buf
, sizeof(buf
)));
1022 isis_tlvs_add_ipv6_reach(
1024 isis_area_ipv6_topology(area
), ipv6
,
1029 switch (circuit
->circ_type
) {
1030 case CIRCUIT_T_BROADCAST
:
1031 if (level
& circuit
->is_type
) {
1033 (level
== IS_LEVEL_1
)
1034 ? circuit
->u
.bc
.l1_desig_is
1035 : circuit
->u
.bc
.l2_desig_is
;
1037 if (LSP_PSEUDO_ID(ne_id
)) {
1038 if (area
->oldmetric
) {
1040 "ISIS (%s): Adding DIS %s.%02x as old-style neighbor",
1043 LSP_PSEUDO_ID(ne_id
));
1044 isis_tlvs_add_oldstyle_reach(
1048 if (area
->newmetric
) {
1049 uint8_t subtlvs
[256];
1052 if (IS_MPLS_TE(isisMplsTE
)
1054 circuit
->interface
))
1055 subtlv_len
= add_te_subtlvs(
1063 level
, ne_id
, metric
,
1064 subtlvs
, subtlv_len
);
1069 "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors",
1073 case CIRCUIT_T_P2P
: {
1074 struct isis_adjacency
*nei
= circuit
->u
.p2p
.neighbor
;
1075 if (nei
&& nei
->adj_state
== ISIS_ADJ_UP
1076 && (level
& nei
->circuit_t
)) {
1078 memcpy(ne_id
, nei
->sysid
, ISIS_SYS_ID_LEN
);
1079 LSP_PSEUDO_ID(ne_id
) = 0;
1081 if (area
->oldmetric
) {
1083 "ISIS (%s): Adding old-style is reach for %s",
1085 sysid_print(ne_id
));
1086 isis_tlvs_add_oldstyle_reach(
1087 lsp
->tlvs
, ne_id
, metric
);
1089 if (area
->newmetric
) {
1090 uint8_t subtlvs
[256];
1093 if (IS_MPLS_TE(isisMplsTE
)
1094 && circuit
->interface
!= NULL
1096 circuit
->interface
))
1097 /* Update Local and Remote IP
1098 * address for MPLS TE circuit
1100 /* NOTE sure that it is the
1101 * pertinent place for that
1103 /* Local IP address could be
1104 * updated in isis_circuit.c -
1105 * isis_circuit_add_addr() */
1106 /* But, where update remote IP
1107 * address ? in isis_pdu.c -
1108 * process_p2p_hello() ? */
1110 /* Add SubTLVs & Adjust real
1111 * size of SubTLVs */
1112 subtlv_len
= add_te_subtlvs(
1113 subtlvs
, circuit
->mtc
);
1115 /* Or keep only TE metric with
1116 * no SubTLVs if MPLS_TE is off
1120 uint32_t neighbor_metric
;
1121 if (fabricd_tier(area
) == 0) {
1122 neighbor_metric
= 0xffe;
1124 neighbor_metric
= metric
;
1127 tlvs_add_mt_p2p(lsp
->tlvs
, circuit
,
1128 ne_id
, neighbor_metric
,
1129 subtlvs
, subtlv_len
);
1133 "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors",
1137 case CIRCUIT_T_LOOPBACK
:
1140 zlog_warn("lsp_area_create: unknown circuit type");
1144 lsp_build_ext_reach(lsp
, area
);
1146 struct isis_tlvs
*tlvs
= lsp
->tlvs
;
1150 size_t tlv_space
= STREAM_WRITEABLE(lsp
->pdu
) - LLC_LEN
;
1151 lsp_clear_data(lsp
);
1153 struct list
*fragments
= isis_fragment_tlvs(tlvs
, tlv_space
);
1155 zlog_warn("BUG: could not fragment own LSP:");
1156 log_multiline(LOG_WARNING
, " ", "%s",
1157 isis_format_tlvs(tlvs
));
1158 isis_free_tlvs(tlvs
);
1161 isis_free_tlvs(tlvs
);
1163 bool fragment_overflow
= false;
1165 for (ALL_LIST_ELEMENTS_RO(fragments
, node
, tlvs
)) {
1166 if (node
!= listhead(fragments
)) {
1167 if (LSP_FRAGMENT(frag
->hdr
.lsp_id
) == 255) {
1168 if (!fragment_overflow
) {
1169 fragment_overflow
= true;
1171 "ISIS (%s): Too much information for 256 fragments",
1174 isis_free_tlvs(tlvs
);
1178 frag
= lsp_next_frag(LSP_FRAGMENT(frag
->hdr
.lsp_id
) + 1,
1184 list_delete(&fragments
);
1185 lsp_debug("ISIS (%s): LSP construction is complete. Serializing...",
1191 * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs
1193 int lsp_generate(struct isis_area
*area
, int level
)
1195 struct isis_lsp
*oldlsp
, *newlsp
;
1196 uint32_t seq_num
= 0;
1197 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
1198 uint16_t rem_lifetime
, refresh_time
;
1200 if ((area
== NULL
) || (area
->is_type
& level
) != level
)
1203 memset(&lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
1204 memcpy(&lspid
, isis
->sysid
, ISIS_SYS_ID_LEN
);
1206 /* only builds the lsp if the area shares the level */
1207 oldlsp
= lsp_search(lspid
, area
->lspdb
[level
- 1]);
1209 /* FIXME: we should actually initiate a purge */
1210 seq_num
= oldlsp
->hdr
.seqno
;
1211 lsp_search_and_destroy(oldlsp
->hdr
.lsp_id
,
1212 area
->lspdb
[level
- 1]);
1214 rem_lifetime
= lsp_rem_lifetime(area
, level
);
1216 lsp_new(area
, lspid
, rem_lifetime
, seq_num
,
1217 area
->is_type
| area
->overload_bit
| area
->attached_bit
,
1219 newlsp
->area
= area
;
1220 newlsp
->own_lsp
= 1;
1222 lsp_insert(newlsp
, area
->lspdb
[level
- 1]);
1223 /* build_lsp_data (newlsp, area); */
1224 lsp_build(newlsp
, area
);
1225 /* time to calculate our checksum */
1226 lsp_seqno_update(newlsp
);
1227 newlsp
->last_generated
= time(NULL
);
1228 lsp_flood(newlsp
, NULL
);
1230 refresh_time
= lsp_refresh_time(newlsp
, rem_lifetime
);
1232 THREAD_TIMER_OFF(area
->t_lsp_refresh
[level
- 1]);
1233 area
->lsp_regenerate_pending
[level
- 1] = 0;
1234 if (level
== IS_LEVEL_1
)
1235 thread_add_timer(master
, lsp_l1_refresh
, area
, refresh_time
,
1236 &area
->t_lsp_refresh
[level
- 1]);
1237 else if (level
== IS_LEVEL_2
)
1238 thread_add_timer(master
, lsp_l2_refresh
, area
, refresh_time
,
1239 &area
->t_lsp_refresh
[level
- 1]);
1241 if (isis
->debugs
& DEBUG_UPDATE_PACKETS
) {
1242 zlog_debug("ISIS-Upd (%s): Building L%d LSP %s, len %" PRIu16
1243 ", seq 0x%08" PRIx32
", cksum 0x%04" PRIx16
1244 ", lifetime %" PRIu16
"s refresh %" PRIu16
"s",
1245 area
->area_tag
, level
,
1246 rawlspid_print(newlsp
->hdr
.lsp_id
),
1247 newlsp
->hdr
.pdu_len
, newlsp
->hdr
.seqno
,
1248 newlsp
->hdr
.checksum
, newlsp
->hdr
.rem_lifetime
,
1252 "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.",
1253 area
->area_tag
, level
);
1259 * Search own LSPs, update holding time and flood
1261 static int lsp_regenerate(struct isis_area
*area
, int level
)
1264 struct isis_lsp
*lsp
, *frag
;
1265 struct listnode
*node
;
1266 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
1267 uint16_t rem_lifetime
, refresh_time
;
1269 if ((area
== NULL
) || (area
->is_type
& level
) != level
)
1272 lspdb
= area
->lspdb
[level
- 1];
1274 memset(lspid
, 0, ISIS_SYS_ID_LEN
+ 2);
1275 memcpy(lspid
, isis
->sysid
, ISIS_SYS_ID_LEN
);
1277 lsp
= lsp_search(lspid
, lspdb
);
1280 flog_err(EC_LIB_DEVELOPMENT
,
1281 "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!",
1282 area
->area_tag
, level
);
1286 lsp_clear_data(lsp
);
1287 lsp_build(lsp
, area
);
1288 rem_lifetime
= lsp_rem_lifetime(area
, level
);
1289 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
1290 lsp
->last_generated
= time(NULL
);
1291 lsp_flood(lsp
, NULL
);
1292 for (ALL_LIST_ELEMENTS_RO(lsp
->lspu
.frags
, node
, frag
)) {
1293 frag
->hdr
.lsp_bits
= lsp_bits_generate(
1294 level
, area
->overload_bit
, area
->attached_bit
);
1295 /* Set the lifetime values of all the fragments to the same
1297 * so that no fragment expires before the lsp is refreshed.
1299 frag
->hdr
.rem_lifetime
= rem_lifetime
;
1300 frag
->age_out
= ZERO_AGE_LIFETIME
;
1301 lsp_flood(frag
, NULL
);
1303 lsp_seqno_update(lsp
);
1305 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1306 if (level
== IS_LEVEL_1
)
1307 thread_add_timer(master
, lsp_l1_refresh
, area
, refresh_time
,
1308 &area
->t_lsp_refresh
[level
- 1]);
1309 else if (level
== IS_LEVEL_2
)
1310 thread_add_timer(master
, lsp_l2_refresh
, area
, refresh_time
,
1311 &area
->t_lsp_refresh
[level
- 1]);
1312 area
->lsp_regenerate_pending
[level
- 1] = 0;
1314 if (isis
->debugs
& DEBUG_UPDATE_PACKETS
) {
1316 "ISIS-Upd (%s): Refreshed our L%d LSP %s, len %" PRIu16
1317 ", seq 0x%08" PRIx32
", cksum 0x%04" PRIx16
1318 ", lifetime %" PRIu16
"s refresh %" PRIu16
"s",
1319 area
->area_tag
, level
, rawlspid_print(lsp
->hdr
.lsp_id
),
1320 lsp
->hdr
.pdu_len
, lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1321 lsp
->hdr
.rem_lifetime
, refresh_time
);
1324 "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.",
1325 area
->area_tag
, level
);
1331 * Something has changed or periodic refresh -> regenerate LSP
1333 static int lsp_l1_refresh(struct thread
*thread
)
1335 struct isis_area
*area
;
1337 area
= THREAD_ARG(thread
);
1340 area
->t_lsp_refresh
[0] = NULL
;
1341 area
->lsp_regenerate_pending
[0] = 0;
1343 if ((area
->is_type
& IS_LEVEL_1
) == 0)
1347 "ISIS (%s): LSP L1 refresh timer expired. Refreshing LSP...",
1349 return lsp_regenerate(area
, IS_LEVEL_1
);
1352 static int lsp_l2_refresh(struct thread
*thread
)
1354 struct isis_area
*area
;
1356 area
= THREAD_ARG(thread
);
1359 area
->t_lsp_refresh
[1] = NULL
;
1360 area
->lsp_regenerate_pending
[1] = 0;
1362 if ((area
->is_type
& IS_LEVEL_2
) == 0)
1366 "ISIS (%s): LSP L2 refresh timer expired. Refreshing LSP...",
1368 return lsp_regenerate(area
, IS_LEVEL_2
);
1371 int lsp_regenerate_schedule(struct isis_area
*area
, int level
, int all_pseudo
)
1373 struct isis_lsp
*lsp
;
1374 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1377 struct listnode
*cnode
;
1378 struct isis_circuit
*circuit
;
1385 "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs",
1386 area
->area_tag
, circuit_t2string(level
),
1387 all_pseudo
? "" : "not ");
1389 memcpy(id
, isis
->sysid
, ISIS_SYS_ID_LEN
);
1390 LSP_PSEUDO_ID(id
) = LSP_FRAGMENT(id
) = 0;
1393 for (lvl
= IS_LEVEL_1
; lvl
<= IS_LEVEL_2
; lvl
++) {
1394 if (!((level
& lvl
) && (area
->is_type
& lvl
)))
1398 "ISIS (%s): Checking whether L%d needs to be scheduled",
1399 area
->area_tag
, lvl
);
1401 if (area
->lsp_regenerate_pending
[lvl
- 1]) {
1402 struct timeval remain
= thread_timer_remain(
1403 area
->t_lsp_refresh
[lvl
- 1]);
1405 "ISIS (%s): Regeneration is already pending, nothing todo."
1406 " (Due in %lld.%03lld seconds)",
1407 area
->area_tag
, (long long)remain
.tv_sec
,
1408 (long long)remain
.tv_usec
/ 1000);
1412 lsp
= lsp_search(id
, area
->lspdb
[lvl
- 1]);
1415 "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.",
1421 * Throttle avoidance
1424 "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld",
1425 area
->area_tag
, (long long)lsp
->last_generated
,
1427 THREAD_TIMER_OFF(area
->t_lsp_refresh
[lvl
- 1]);
1428 diff
= now
- lsp
->last_generated
;
1429 if (diff
< area
->lsp_gen_interval
[lvl
- 1]) {
1431 1000 * (area
->lsp_gen_interval
[lvl
- 1] - diff
);
1433 "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval",
1434 area
->area_tag
, timeout
);
1437 * lsps are not regenerated if lsp_regenerate function
1439 * directly. However if the lsp_regenerate call is
1441 * later execution it works.
1445 "ISIS (%s): Last generation was more than lsp_gen_interval ago."
1446 " Scheduling for execution in %ld ms.",
1447 area
->area_tag
, timeout
);
1450 area
->lsp_regenerate_pending
[lvl
- 1] = 1;
1451 if (lvl
== IS_LEVEL_1
) {
1452 thread_add_timer_msec(master
, lsp_l1_refresh
, area
,
1454 &area
->t_lsp_refresh
[lvl
- 1]);
1455 } else if (lvl
== IS_LEVEL_2
) {
1456 thread_add_timer_msec(master
, lsp_l2_refresh
, area
,
1458 &area
->t_lsp_refresh
[lvl
- 1]);
1463 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, cnode
, circuit
))
1464 lsp_regenerate_schedule_pseudo(circuit
, level
);
1471 * Funcs for pseudonode LSPs
1475 * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs
1477 static void lsp_build_pseudo(struct isis_lsp
*lsp
, struct isis_circuit
*circuit
,
1480 struct isis_adjacency
*adj
;
1481 struct list
*adj_list
;
1482 struct listnode
*node
;
1483 struct isis_area
*area
= circuit
->area
;
1485 lsp_clear_data(lsp
);
1486 lsp
->tlvs
= isis_alloc_tlvs();
1488 "ISIS (%s): Constructing pseudo LSP %s for interface %s level %d",
1489 area
->area_tag
, rawlspid_print(lsp
->hdr
.lsp_id
),
1490 circuit
->interface
->name
, level
);
1493 /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
1495 lsp_bits_generate(level
, 0, circuit
->area
->attached_bit
);
1498 * add self to IS neighbours
1500 uint8_t ne_id
[ISIS_SYS_ID_LEN
+ 1];
1502 memcpy(ne_id
, isis
->sysid
, ISIS_SYS_ID_LEN
);
1503 LSP_PSEUDO_ID(ne_id
) = 0;
1505 if (circuit
->area
->oldmetric
) {
1506 isis_tlvs_add_oldstyle_reach(lsp
->tlvs
, ne_id
, 0);
1508 "ISIS (%s): Adding %s.%02x as old-style neighbor (self)",
1509 area
->area_tag
, sysid_print(ne_id
),
1510 LSP_PSEUDO_ID(ne_id
));
1512 if (circuit
->area
->newmetric
) {
1513 isis_tlvs_add_extended_reach(lsp
->tlvs
, ISIS_MT_IPV4_UNICAST
,
1516 "ISIS (%s): Adding %s.%02x as te-style neighbor (self)",
1517 area
->area_tag
, sysid_print(ne_id
),
1518 LSP_PSEUDO_ID(ne_id
));
1521 adj_list
= list_new();
1522 isis_adj_build_up_list(circuit
->u
.bc
.adjdb
[level
- 1], adj_list
);
1524 for (ALL_LIST_ELEMENTS_RO(adj_list
, node
, adj
)) {
1525 if (!(adj
->level
& level
)) {
1527 "ISIS (%s): Ignoring neighbor %s, level does not intersect",
1528 area
->area_tag
, sysid_print(adj
->sysid
));
1532 if (!(level
== IS_LEVEL_1
1533 && adj
->sys_type
== ISIS_SYSTYPE_L1_IS
)
1534 && !(level
== IS_LEVEL_1
1535 && adj
->sys_type
== ISIS_SYSTYPE_L2_IS
1536 && adj
->adj_usage
== ISIS_ADJ_LEVEL1AND2
)
1537 && !(level
== IS_LEVEL_2
1538 && adj
->sys_type
== ISIS_SYSTYPE_L2_IS
)) {
1540 "ISIS (%s): Ignoring neighbor %s, level does not match",
1541 area
->area_tag
, sysid_print(adj
->sysid
));
1545 memcpy(ne_id
, adj
->sysid
, ISIS_SYS_ID_LEN
);
1546 if (circuit
->area
->oldmetric
) {
1547 isis_tlvs_add_oldstyle_reach(lsp
->tlvs
, ne_id
, 0);
1549 "ISIS (%s): Adding %s.%02x as old-style neighbor (peer)",
1550 area
->area_tag
, sysid_print(ne_id
),
1551 LSP_PSEUDO_ID(ne_id
));
1553 if (circuit
->area
->newmetric
) {
1554 isis_tlvs_add_extended_reach(lsp
->tlvs
,
1555 ISIS_MT_IPV4_UNICAST
,
1558 "ISIS (%s): Adding %s.%02x as te-style neighbor (peer)",
1559 area
->area_tag
, sysid_print(ne_id
),
1560 LSP_PSEUDO_ID(ne_id
));
1563 list_delete(&adj_list
);
1567 int lsp_generate_pseudo(struct isis_circuit
*circuit
, int level
)
1569 dict_t
*lspdb
= circuit
->area
->lspdb
[level
- 1];
1570 struct isis_lsp
*lsp
;
1571 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1572 uint16_t rem_lifetime
, refresh_time
;
1574 if ((circuit
->is_type
& level
) != level
1575 || (circuit
->state
!= C_STATE_UP
)
1576 || (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1577 || (circuit
->u
.bc
.is_dr
[level
- 1] == 0))
1580 memcpy(lsp_id
, isis
->sysid
, ISIS_SYS_ID_LEN
);
1581 LSP_FRAGMENT(lsp_id
) = 0;
1582 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1585 * If for some reason have a pseudo LSP in the db already -> regenerate
1587 if (lsp_search(lsp_id
, lspdb
))
1588 return lsp_regenerate_schedule_pseudo(circuit
, level
);
1590 rem_lifetime
= lsp_rem_lifetime(circuit
->area
, level
);
1591 /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
1592 lsp
= lsp_new(circuit
->area
, lsp_id
, rem_lifetime
, 1,
1593 circuit
->area
->is_type
| circuit
->area
->attached_bit
, 0,
1595 lsp
->area
= circuit
->area
;
1597 lsp_build_pseudo(lsp
, circuit
, level
);
1600 lsp_insert(lsp
, lspdb
);
1601 lsp_flood(lsp
, NULL
);
1603 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1604 THREAD_TIMER_OFF(circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1605 circuit
->lsp_regenerate_pending
[level
- 1] = 0;
1606 if (level
== IS_LEVEL_1
)
1608 master
, lsp_l1_refresh_pseudo
, circuit
, refresh_time
,
1609 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1610 else if (level
== IS_LEVEL_2
)
1612 master
, lsp_l2_refresh_pseudo
, circuit
, refresh_time
,
1613 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1615 if (isis
->debugs
& DEBUG_UPDATE_PACKETS
) {
1617 "ISIS-Upd (%s): Built L%d Pseudo LSP %s, len %" PRIu16
1618 ", seq 0x%08" PRIx32
", cksum 0x%04" PRIx16
1619 ", lifetime %" PRIu16
"s, refresh %" PRIu16
"s",
1620 circuit
->area
->area_tag
, level
,
1621 rawlspid_print(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
1622 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1623 lsp
->hdr
.rem_lifetime
, refresh_time
);
1629 static int lsp_regenerate_pseudo(struct isis_circuit
*circuit
, int level
)
1631 dict_t
*lspdb
= circuit
->area
->lspdb
[level
- 1];
1632 struct isis_lsp
*lsp
;
1633 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1634 uint16_t rem_lifetime
, refresh_time
;
1636 if ((circuit
->is_type
& level
) != level
1637 || (circuit
->state
!= C_STATE_UP
)
1638 || (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1639 || (circuit
->u
.bc
.is_dr
[level
- 1] == 0))
1642 memcpy(lsp_id
, isis
->sysid
, ISIS_SYS_ID_LEN
);
1643 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1644 LSP_FRAGMENT(lsp_id
) = 0;
1646 lsp
= lsp_search(lsp_id
, lspdb
);
1649 flog_err(EC_LIB_DEVELOPMENT
,
1650 "lsp_regenerate_pseudo: no l%d LSP %s found!", level
,
1651 rawlspid_print(lsp_id
));
1655 rem_lifetime
= lsp_rem_lifetime(circuit
->area
, level
);
1656 lsp
->hdr
.rem_lifetime
= rem_lifetime
;
1657 lsp_build_pseudo(lsp
, circuit
, level
);
1658 lsp_inc_seqno(lsp
, 0);
1659 lsp
->last_generated
= time(NULL
);
1660 lsp_flood(lsp
, NULL
);
1662 refresh_time
= lsp_refresh_time(lsp
, rem_lifetime
);
1663 if (level
== IS_LEVEL_1
)
1665 master
, lsp_l1_refresh_pseudo
, circuit
, refresh_time
,
1666 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1667 else if (level
== IS_LEVEL_2
)
1669 master
, lsp_l2_refresh_pseudo
, circuit
, refresh_time
,
1670 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[level
- 1]);
1672 if (isis
->debugs
& DEBUG_UPDATE_PACKETS
) {
1674 "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %s, len %" PRIu16
1675 ", seq 0x%08" PRIx32
", cksum 0x%04" PRIx16
1676 ", lifetime %" PRIu16
"s, refresh %" PRIu16
"s",
1677 circuit
->area
->area_tag
, level
,
1678 rawlspid_print(lsp
->hdr
.lsp_id
), lsp
->hdr
.pdu_len
,
1679 lsp
->hdr
.seqno
, lsp
->hdr
.checksum
,
1680 lsp
->hdr
.rem_lifetime
, refresh_time
);
1687 * Something has changed or periodic refresh -> regenerate pseudo LSP
1689 static int lsp_l1_refresh_pseudo(struct thread
*thread
)
1691 struct isis_circuit
*circuit
;
1692 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1694 circuit
= THREAD_ARG(thread
);
1696 circuit
->u
.bc
.t_refresh_pseudo_lsp
[0] = NULL
;
1697 circuit
->lsp_regenerate_pending
[0] = 0;
1699 if ((circuit
->u
.bc
.is_dr
[0] == 0)
1700 || (circuit
->is_type
& IS_LEVEL_1
) == 0) {
1701 memcpy(id
, isis
->sysid
, ISIS_SYS_ID_LEN
);
1702 LSP_PSEUDO_ID(id
) = circuit
->circuit_id
;
1703 LSP_FRAGMENT(id
) = 0;
1704 lsp_purge_pseudo(id
, circuit
, IS_LEVEL_1
);
1708 return lsp_regenerate_pseudo(circuit
, IS_LEVEL_1
);
1711 static int lsp_l2_refresh_pseudo(struct thread
*thread
)
1713 struct isis_circuit
*circuit
;
1714 uint8_t id
[ISIS_SYS_ID_LEN
+ 2];
1716 circuit
= THREAD_ARG(thread
);
1718 circuit
->u
.bc
.t_refresh_pseudo_lsp
[1] = NULL
;
1719 circuit
->lsp_regenerate_pending
[1] = 0;
1721 if ((circuit
->u
.bc
.is_dr
[1] == 0)
1722 || (circuit
->is_type
& IS_LEVEL_2
) == 0) {
1723 memcpy(id
, isis
->sysid
, ISIS_SYS_ID_LEN
);
1724 LSP_PSEUDO_ID(id
) = circuit
->circuit_id
;
1725 LSP_FRAGMENT(id
) = 0;
1726 lsp_purge_pseudo(id
, circuit
, IS_LEVEL_2
);
1730 return lsp_regenerate_pseudo(circuit
, IS_LEVEL_2
);
1733 int lsp_regenerate_schedule_pseudo(struct isis_circuit
*circuit
, int level
)
1735 struct isis_lsp
*lsp
;
1736 uint8_t lsp_id
[ISIS_SYS_ID_LEN
+ 2];
1740 struct isis_area
*area
= circuit
->area
;
1742 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
1743 || circuit
->state
!= C_STATE_UP
)
1747 "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s",
1748 area
->area_tag
, circuit_t2string(level
),
1749 circuit
->interface
->name
);
1751 memcpy(lsp_id
, isis
->sysid
, ISIS_SYS_ID_LEN
);
1752 LSP_PSEUDO_ID(lsp_id
) = circuit
->circuit_id
;
1753 LSP_FRAGMENT(lsp_id
) = 0;
1756 for (lvl
= IS_LEVEL_1
; lvl
<= IS_LEVEL_2
; lvl
++) {
1758 "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled",
1759 area
->area_tag
, lvl
);
1761 if (!((level
& lvl
) && (circuit
->is_type
& lvl
))) {
1762 sched_debug("ISIS (%s): Level is not active on circuit",
1767 if (circuit
->u
.bc
.is_dr
[lvl
- 1] == 0) {
1769 "ISIS (%s): This IS is not DR, nothing to do.",
1774 if (circuit
->lsp_regenerate_pending
[lvl
- 1]) {
1775 struct timeval remain
= thread_timer_remain(
1776 circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1778 "ISIS (%s): Regenerate is already pending, nothing todo."
1779 " (Due in %lld.%03lld seconds)",
1780 area
->area_tag
, (long long)remain
.tv_sec
,
1781 (long long)remain
.tv_usec
/ 1000);
1785 lsp
= lsp_search(lsp_id
, circuit
->area
->lspdb
[lvl
- 1]);
1788 "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.",
1794 * Throttle avoidance
1797 "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld",
1798 area
->area_tag
, (long long)lsp
->last_generated
,
1800 THREAD_TIMER_OFF(circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1801 diff
= now
- lsp
->last_generated
;
1802 if (diff
< circuit
->area
->lsp_gen_interval
[lvl
- 1]) {
1804 1000 * (circuit
->area
->lsp_gen_interval
[lvl
- 1]
1807 "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval",
1808 area
->area_tag
, timeout
);
1812 "ISIS (%s): Last generation was more than lsp_gen_interval ago."
1813 " Scheduling for execution in %ld ms.",
1814 area
->area_tag
, timeout
);
1817 circuit
->lsp_regenerate_pending
[lvl
- 1] = 1;
1819 if (lvl
== IS_LEVEL_1
) {
1820 thread_add_timer_msec(
1821 master
, lsp_l1_refresh_pseudo
, circuit
, timeout
,
1822 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1823 } else if (lvl
== IS_LEVEL_2
) {
1824 thread_add_timer_msec(
1825 master
, lsp_l2_refresh_pseudo
, circuit
, timeout
,
1826 &circuit
->u
.bc
.t_refresh_pseudo_lsp
[lvl
- 1]);
1834 * Walk through LSPs for an area
1835 * - set remaining lifetime
1837 int lsp_tick(struct thread
*thread
)
1839 struct isis_area
*area
;
1840 struct isis_lsp
*lsp
;
1841 dnode_t
*dnode
, *dnode_next
;
1843 uint16_t rem_lifetime
;
1844 bool fabricd_sync_incomplete
= false;
1846 area
= THREAD_ARG(thread
);
1848 area
->t_tick
= NULL
;
1849 thread_add_timer(master
, lsp_tick
, area
, 1, &area
->t_tick
);
1851 struct isis_circuit
*fabricd_init_c
= fabricd_initial_sync_circuit(area
);
1854 * Remove LSPs which have aged out
1856 for (level
= 0; level
< ISIS_LEVELS
; level
++) {
1857 if (area
->lspdb
[level
] && dict_count(area
->lspdb
[level
]) > 0) {
1858 for (dnode
= dict_first(area
->lspdb
[level
]);
1859 dnode
!= NULL
; dnode
= dnode_next
) {
1861 dict_next(area
->lspdb
[level
], dnode
);
1862 lsp
= dnode_get(dnode
);
1865 * The lsp rem_lifetime is kept at 0 for MaxAge
1867 * ZeroAgeLifetime depending on explicit purge
1869 * natural age out. So schedule spf only once
1871 * the first time rem_lifetime becomes 0.
1873 rem_lifetime
= lsp
->hdr
.rem_lifetime
;
1877 * Schedule may run spf which should be done
1879 * the lsp rem_lifetime becomes 0 for the first
1881 * ISO 10589 - 7.3.16.4 first paragraph.
1883 if (rem_lifetime
== 1 && lsp
->hdr
.seqno
!= 0) {
1884 /* 7.3.16.4 a) set SRM flags on all */
1885 /* 7.3.16.4 b) retain only the header */
1886 if (lsp
->area
->purge_originator
)
1887 lsp_purge(lsp
, lsp
->level
, NULL
);
1889 lsp_flood(lsp
, NULL
);
1890 /* 7.3.16.4 c) record the time to purge
1892 isis_spf_schedule(lsp
->area
, lsp
->level
);
1895 if (lsp
->age_out
== 0) {
1897 "ISIS-Upd (%s): L%u LSP %s seq "
1898 "0x%08" PRIx32
" aged out",
1899 area
->area_tag
, lsp
->level
,
1900 rawlspid_print(lsp
->hdr
.lsp_id
),
1904 dict_delete_free(area
->lspdb
[level
],
1908 if (fabricd_init_c
&& lsp
) {
1909 fabricd_sync_incomplete
|=
1910 ISIS_CHECK_FLAG(lsp
->SSNflags
,
1918 && !fabricd_sync_incomplete
1919 && !isis_tx_queue_len(fabricd_init_c
->tx_queue
)) {
1920 fabricd_initial_sync_finish(area
);
1926 void lsp_purge_pseudo(uint8_t *id
, struct isis_circuit
*circuit
, int level
)
1928 struct isis_lsp
*lsp
;
1930 lsp
= lsp_search(id
, circuit
->area
->lspdb
[level
- 1]);
1934 lsp_purge(lsp
, level
, NULL
);
1938 * Purge own LSP that is received and we don't have.
1939 * -> Do as in 7.3.16.4
1941 void lsp_purge_non_exist(int level
, struct isis_lsp_hdr
*hdr
,
1942 struct isis_area
*area
)
1944 struct isis_lsp
*lsp
;
1947 * We need to create the LSP to be purged
1949 lsp
= XCALLOC(MTYPE_ISIS_LSP
, sizeof(struct isis_lsp
));
1952 lsp
->pdu
= stream_new(LLC_LEN
+ area
->lsp_mtu
);
1953 lsp
->age_out
= ZERO_AGE_LIFETIME
;
1955 memcpy(&lsp
->hdr
, hdr
, sizeof(lsp
->hdr
));
1956 lsp
->hdr
.rem_lifetime
= 0;
1958 lsp_purge_add_poi(lsp
, NULL
);
1962 lsp_insert(lsp
, area
->lspdb
[lsp
->level
- 1]);
1963 lsp_flood(lsp
, NULL
);
1968 void lsp_set_all_srmflags(struct isis_lsp
*lsp
, bool set
)
1970 struct listnode
*node
;
1971 struct isis_circuit
*circuit
;
1978 struct list
*circuit_list
= lsp
->area
->circuit_list
;
1979 for (ALL_LIST_ELEMENTS_RO(circuit_list
, node
, circuit
)) {
1981 isis_tx_queue_add(circuit
->tx_queue
, lsp
,
1984 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
1989 void lsp_flood(struct isis_lsp
*lsp
, struct isis_circuit
*circuit
)
1992 lsp_set_all_srmflags(lsp
, true);
1994 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
1996 fabricd_lsp_flood(lsp
);