2 * IS-IS Rout(e)ing protocol - isis_pdu.c
5 * Copyright (C) 2001,2002 Sampo Saaristo
6 * Tampere University of Technology
7 * Institute of Communications Engineering
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public Licenseas published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
14 * This program is distributed in the hope that it will be useful,but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 * You should have received a copy of the GNU General Public License along
20 * with this program; see the file COPYING; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
37 #include "lib_errors.h"
39 #include "isisd/dict.h"
40 #include "isisd/isis_constants.h"
41 #include "isisd/isis_common.h"
42 #include "isisd/isis_flags.h"
43 #include "isisd/isis_adjacency.h"
44 #include "isisd/isis_circuit.h"
45 #include "isisd/isis_network.h"
46 #include "isisd/isis_misc.h"
47 #include "isisd/isis_dr.h"
48 #include "isisd/isisd.h"
49 #include "isisd/isis_dynhn.h"
50 #include "isisd/isis_lsp.h"
51 #include "isisd/isis_pdu.h"
52 #include "isisd/iso_checksum.h"
53 #include "isisd/isis_csm.h"
54 #include "isisd/isis_events.h"
55 #include "isisd/isis_te.h"
56 #include "isisd/isis_mt.h"
57 #include "isisd/isis_tlvs.h"
58 #include "isisd/isis_errors.h"
59 #include "isisd/fabricd.h"
60 #include "isisd/isis_tx_queue.h"
61 #include "isisd/isis_pdu_counter.h"
63 static int ack_lsp(struct isis_lsp_hdr
*hdr
, struct isis_circuit
*circuit
,
70 (level
== IS_LEVEL_1
) ? L1_PARTIAL_SEQ_NUM
: L2_PARTIAL_SEQ_NUM
;
72 isis_circuit_stream(circuit
, &circuit
->snd_stream
);
74 fill_fixed_hdr(pdu_type
, circuit
->snd_stream
);
76 lenp
= stream_get_endp(circuit
->snd_stream
);
77 stream_putw(circuit
->snd_stream
, 0); /* PDU length */
78 stream_put(circuit
->snd_stream
, isis
->sysid
, ISIS_SYS_ID_LEN
);
79 stream_putc(circuit
->snd_stream
, circuit
->idx
);
80 stream_putc(circuit
->snd_stream
, 9); /* code */
81 stream_putc(circuit
->snd_stream
, 16); /* len */
83 stream_putw(circuit
->snd_stream
, hdr
->rem_lifetime
);
84 stream_put(circuit
->snd_stream
, hdr
->lsp_id
, ISIS_SYS_ID_LEN
+ 2);
85 stream_putl(circuit
->snd_stream
, hdr
->seqno
);
86 stream_putw(circuit
->snd_stream
, hdr
->checksum
);
88 length
= (uint16_t)stream_get_endp(circuit
->snd_stream
);
89 /* Update PDU length */
90 stream_putw_at(circuit
->snd_stream
, lenp
, length
);
92 pdu_counter_count(circuit
->area
->pdu_tx_counters
, pdu_type
);
93 retval
= circuit
->tx(circuit
, level
);
94 if (retval
!= ISIS_OK
)
95 flog_err(EC_ISIS_PACKET
,
96 "ISIS-Upd (%s): Send L%d LSP PSNP on %s failed",
97 circuit
->area
->area_tag
, level
,
98 circuit
->interface
->name
);
108 struct isis_circuit
*circuit
;
113 uint8_t sys_id
[ISIS_SYS_ID_LEN
];
120 uint8_t dis
[ISIS_SYS_ID_LEN
+ 1];
125 struct isis_tlvs
*tlvs
;
128 static int process_p2p_hello(struct iih_info
*iih
)
130 struct isis_threeway_adj
*tw_adj
= iih
->tlvs
->threeway_adj
;
132 if (tw_adj
->state
> ISIS_THREEWAY_DOWN
) {
133 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
134 zlog_debug("ISIS-Adj (%s): Rcvd P2P IIH from (%s) with invalid three-way state: %d\n",
135 iih
->circuit
->area
->area_tag
,
136 iih
->circuit
->interface
->name
,
142 if (tw_adj
->neighbor_set
143 && (memcmp(tw_adj
->neighbor_id
, isis
->sysid
, ISIS_SYS_ID_LEN
)
144 || tw_adj
->neighbor_circuit_id
!= (uint32_t) iih
->circuit
->idx
)) {
146 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
147 zlog_debug("ISIS-Adj (%s): Rcvd P2P IIH from (%s) which lists IS/Circuit different from us as neighbor.\n",
148 iih
->circuit
->area
->area_tag
,
149 iih
->circuit
->interface
->name
);
157 * My interpertation of the ISO, if no adj exists we will create one for
160 struct isis_adjacency
*adj
= iih
->circuit
->u
.p2p
.neighbor
;
161 /* If an adjacency exists, check it is with the source of the hello
164 if (memcmp(iih
->sys_id
, adj
->sysid
, ISIS_SYS_ID_LEN
)) {
166 "hello source and adjacency do not match, set adj down\n");
167 isis_adj_state_change(adj
, ISIS_ADJ_DOWN
,
172 if (!adj
|| adj
->level
!= iih
->circ_type
) {
174 adj
= isis_new_adj(iih
->sys_id
, NULL
, iih
->circ_type
,
177 adj
->level
= iih
->circ_type
;
179 iih
->circuit
->u
.p2p
.neighbor
= adj
;
180 /* Build lsp with the new neighbor entry when a new
181 * adjacency is formed. Set adjacency circuit type to
182 * IIH PDU header circuit type before lsp is regenerated
183 * when an adjacency is up. This will result in the new
184 * adjacency entry getting added to the lsp tlv neighbor list.
186 adj
->circuit_t
= iih
->circ_type
;
187 isis_adj_state_change(adj
, ISIS_ADJ_INITIALIZING
, NULL
);
188 adj
->sys_type
= ISIS_SYSTYPE_UNKNOWN
;
191 if (tw_adj
&& adj
->threeway_state
== ISIS_THREEWAY_DOWN
)
192 adj
->ext_circuit_id
= tw_adj
->local_circuit_id
;
194 /* 8.2.6 Monitoring point-to-point adjacencies */
195 adj
->hold_time
= iih
->holdtime
;
196 adj
->last_upd
= time(NULL
);
199 isis_tlvs_to_adj(iih
->tlvs
, adj
, &changed
);
200 changed
|= tlvs_to_adj_mt_set(iih
->tlvs
, iih
->v4_usable
, iih
->v6_usable
,
203 /* Update MPLS TE Remote IP address parameter if possible */
204 if (IS_MPLS_TE(isisMplsTE
) && iih
->circuit
->mtc
205 && IS_CIRCUIT_TE(iih
->circuit
->mtc
) && adj
->ipv4_address_count
)
206 set_circuitparams_rmt_ipaddr(iih
->circuit
->mtc
,
207 adj
->ipv4_addresses
[0]);
209 /* lets take care of the expiry */
210 THREAD_TIMER_OFF(adj
->t_expire
);
211 thread_add_timer(master
, isis_adj_expire
, adj
, (long)adj
->hold_time
,
214 /* While fabricds initial sync is in progress, ignore hellos from other
215 * interfaces than the one we are performing the initial sync on. */
216 if (fabricd_initial_sync_is_in_progress(iih
->circuit
->area
)
217 && fabricd_initial_sync_circuit(iih
->circuit
->area
) != iih
->circuit
)
220 /* 8.2.5.2 a) a match was detected */
221 if (isis_tlvs_area_addresses_match(iih
->tlvs
,
222 iih
->circuit
->area
->area_addrs
)) {
223 /* 8.2.5.2 a) 2) If the system is L1 - table 5 */
224 if (iih
->circuit
->area
->is_type
== IS_LEVEL_1
) {
225 switch (iih
->circ_type
) {
227 case IS_LEVEL_1_AND_2
:
228 if (adj
->adj_state
!= ISIS_ADJ_UP
229 || adj
->adj_usage
== ISIS_ADJ_LEVEL1
) {
230 isis_adj_process_threeway(adj
, tw_adj
,
235 if (adj
->adj_state
!= ISIS_ADJ_UP
) {
236 /* (7) reject - wrong system type event
238 zlog_warn("wrongSystemType");
240 } else if (adj
->adj_usage
== ISIS_ADJ_LEVEL1
) {
241 /* (6) down - wrong system */
242 isis_adj_state_change(adj
,
250 /* 8.2.5.2 a) 3) If the system is L1L2 - table 6 */
251 if (iih
->circuit
->area
->is_type
== IS_LEVEL_1_AND_2
) {
252 switch (iih
->circ_type
) {
254 if (adj
->adj_state
!= ISIS_ADJ_UP
255 || adj
->adj_usage
== ISIS_ADJ_LEVEL1
) {
256 isis_adj_process_threeway(adj
, tw_adj
,
258 } else if ((adj
->adj_usage
259 == ISIS_ADJ_LEVEL1AND2
)
261 == ISIS_ADJ_LEVEL2
)) {
262 /* (8) down - wrong system */
263 isis_adj_state_change(adj
,
269 if (adj
->adj_state
!= ISIS_ADJ_UP
270 || adj
->adj_usage
== ISIS_ADJ_LEVEL2
) {
271 isis_adj_process_threeway(adj
, tw_adj
,
273 } else if ((adj
->adj_usage
== ISIS_ADJ_LEVEL1
)
275 == ISIS_ADJ_LEVEL1AND2
)) {
276 /* (8) down - wrong system */
277 isis_adj_state_change(adj
,
282 case IS_LEVEL_1_AND_2
:
283 if (adj
->adj_state
!= ISIS_ADJ_UP
284 || adj
->adj_usage
== ISIS_ADJ_LEVEL1AND2
) {
285 isis_adj_process_threeway(adj
, tw_adj
,
286 ISIS_ADJ_LEVEL1AND2
);
287 } else if ((adj
->adj_usage
== ISIS_ADJ_LEVEL1
)
289 == ISIS_ADJ_LEVEL2
)) {
290 /* (8) down - wrong system */
291 isis_adj_state_change(adj
,
299 /* 8.2.5.2 a) 4) If the system is L2 - table 7 */
300 if (iih
->circuit
->area
->is_type
== IS_LEVEL_2
) {
301 switch (iih
->circ_type
) {
303 if (adj
->adj_state
!= ISIS_ADJ_UP
) {
304 /* (5) reject - wrong system type event
306 zlog_warn("wrongSystemType");
308 } else if ((adj
->adj_usage
309 == ISIS_ADJ_LEVEL1AND2
)
311 == ISIS_ADJ_LEVEL2
)) {
312 /* (6) down - wrong system */
313 isis_adj_state_change(adj
,
318 case IS_LEVEL_1_AND_2
:
320 if (adj
->adj_state
!= ISIS_ADJ_UP
321 || adj
->adj_usage
== ISIS_ADJ_LEVEL2
) {
322 isis_adj_process_threeway(adj
, tw_adj
,
324 } else if (adj
->adj_usage
325 == ISIS_ADJ_LEVEL1AND2
) {
326 /* (6) down - wrong system */
327 isis_adj_state_change(adj
,
335 /* 8.2.5.2 b) if no match was detected */
336 else if (listcount(iih
->circuit
->area
->area_addrs
) > 0) {
337 if (iih
->circuit
->area
->is_type
== IS_LEVEL_1
) {
338 /* 8.2.5.2 b) 1) is_type L1 and adj is not up */
339 if (adj
->adj_state
!= ISIS_ADJ_UP
) {
340 isis_adj_state_change(adj
, ISIS_ADJ_DOWN
,
342 /* 8.2.5.2 b) 2)is_type L1 and adj is up */
344 isis_adj_state_change(adj
, ISIS_ADJ_DOWN
,
345 "Down - Area Mismatch");
348 /* 8.2.5.2 b 3 If the system is L2 or L1L2 - table 8 */
350 switch (iih
->circ_type
) {
352 if (adj
->adj_state
!= ISIS_ADJ_UP
) {
353 /* (6) reject - Area Mismatch event */
354 zlog_warn("AreaMismatch");
356 } else if (adj
->adj_usage
== ISIS_ADJ_LEVEL1
) {
357 /* (7) down - area mismatch */
358 isis_adj_state_change(adj
,
362 } else if ((adj
->adj_usage
363 == ISIS_ADJ_LEVEL1AND2
)
365 == ISIS_ADJ_LEVEL2
)) {
366 /* (7) down - wrong system */
367 isis_adj_state_change(adj
,
372 case IS_LEVEL_1_AND_2
:
374 if (adj
->adj_state
!= ISIS_ADJ_UP
375 || adj
->adj_usage
== ISIS_ADJ_LEVEL2
) {
376 isis_adj_process_threeway(adj
, tw_adj
,
378 } else if (adj
->adj_usage
== ISIS_ADJ_LEVEL1
) {
379 /* (7) down - wrong system */
380 isis_adj_state_change(adj
,
383 } else if (adj
->adj_usage
384 == ISIS_ADJ_LEVEL1AND2
) {
385 if (iih
->circ_type
== IS_LEVEL_2
) {
386 /* (7) down - wrong system */
387 isis_adj_state_change(
391 /* (7) down - area mismatch */
392 isis_adj_state_change(
401 /* down - area mismatch */
402 isis_adj_state_change(adj
, ISIS_ADJ_DOWN
, "Area Mismatch");
405 if (adj
->adj_state
== ISIS_ADJ_UP
&& changed
) {
406 lsp_regenerate_schedule(adj
->circuit
->area
,
407 isis_adj_usage2levels(adj
->adj_usage
),
411 /* 8.2.5.2 c) if the action was up - comparing circuit IDs */
412 /* FIXME - Missing parts */
414 /* some of my own understanding of the ISO, why the heck does
415 * it not say what should I change the system_type to...
417 switch (adj
->adj_usage
) {
418 case ISIS_ADJ_LEVEL1
:
419 adj
->sys_type
= ISIS_SYSTYPE_L1_IS
;
421 case ISIS_ADJ_LEVEL2
:
422 adj
->sys_type
= ISIS_SYSTYPE_L2_IS
;
424 case ISIS_ADJ_LEVEL1AND2
:
425 adj
->sys_type
= ISIS_SYSTYPE_L2_IS
;
428 adj
->sys_type
= ISIS_SYSTYPE_UNKNOWN
;
432 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
434 "ISIS-Adj (%s): Rcvd P2P IIH from (%s), cir type %s,"
435 " cir id %hhu, length %" PRIu16
,
436 iih
->circuit
->area
->area_tag
,
437 iih
->circuit
->interface
->name
,
438 circuit_t2string(iih
->circuit
->is_type
),
439 iih
->circuit
->circuit_id
, iih
->pdu_len
);
445 static int process_lan_hello(struct iih_info
*iih
)
447 struct isis_adjacency
*adj
;
448 adj
= isis_adj_lookup(iih
->sys_id
,
449 iih
->circuit
->u
.bc
.adjdb
[iih
->level
- 1]);
450 if ((adj
== NULL
) || (memcmp(adj
->snpa
, iih
->ssnpa
, ETH_ALEN
))
451 || (adj
->level
!= iih
->level
)) {
453 /* Do as in 8.4.2.5 */
454 adj
= isis_new_adj(iih
->sys_id
, iih
->ssnpa
, iih
->level
,
458 memcpy(adj
->snpa
, iih
->ssnpa
, 6);
460 memset(adj
->snpa
, ' ', 6);
462 adj
->level
= iih
->level
;
464 isis_adj_state_change(adj
, ISIS_ADJ_INITIALIZING
, NULL
);
466 if (iih
->level
== IS_LEVEL_1
)
467 adj
->sys_type
= ISIS_SYSTYPE_L1_IS
;
469 adj
->sys_type
= ISIS_SYSTYPE_L2_IS
;
470 list_delete_all_node(
471 iih
->circuit
->u
.bc
.lan_neighs
[iih
->level
- 1]);
472 isis_adj_build_neigh_list(
473 iih
->circuit
->u
.bc
.adjdb
[iih
->level
- 1],
474 iih
->circuit
->u
.bc
.lan_neighs
[iih
->level
- 1]);
477 if (adj
->dis_record
[iih
->level
- 1].dis
== ISIS_IS_DIS
) {
478 uint8_t *dis
= (iih
->level
== 1)
479 ? iih
->circuit
->u
.bc
.l1_desig_is
480 : iih
->circuit
->u
.bc
.l2_desig_is
;
482 if (memcmp(dis
, iih
->dis
, ISIS_SYS_ID_LEN
+ 1)) {
483 thread_add_event(master
, isis_event_dis_status_change
,
484 iih
->circuit
, 0, NULL
);
485 memcpy(dis
, iih
->dis
, ISIS_SYS_ID_LEN
+ 1);
489 adj
->circuit_t
= iih
->circ_type
;
490 adj
->hold_time
= iih
->holdtime
;
491 adj
->last_upd
= time(NULL
);
492 adj
->prio
[iih
->level
- 1] = iih
->priority
;
493 memcpy(adj
->lanid
, iih
->dis
, ISIS_SYS_ID_LEN
+ 1);
496 isis_tlvs_to_adj(iih
->tlvs
, adj
, &changed
);
497 changed
|= tlvs_to_adj_mt_set(iih
->tlvs
, iih
->v4_usable
, iih
->v6_usable
,
500 /* lets take care of the expiry */
501 THREAD_TIMER_OFF(adj
->t_expire
);
502 thread_add_timer(master
, isis_adj_expire
, adj
, (long)adj
->hold_time
,
506 * If the snpa for this circuit is found from LAN Neighbours TLV
507 * we have two-way communication -> adjacency can be put to state "up"
509 bool own_snpa_found
=
510 isis_tlvs_own_snpa_found(iih
->tlvs
, iih
->circuit
->u
.bc
.snpa
);
512 if (adj
->adj_state
!= ISIS_ADJ_UP
) {
513 if (own_snpa_found
) {
514 isis_adj_state_change(
516 "own SNPA found in LAN Neighbours TLV");
519 if (!own_snpa_found
) {
520 isis_adj_state_change(
521 adj
, ISIS_ADJ_INITIALIZING
,
522 "own SNPA not found in LAN Neighbours TLV");
526 if (adj
->adj_state
== ISIS_ADJ_UP
&& changed
)
527 lsp_regenerate_schedule(adj
->circuit
->area
, iih
->level
, 0);
529 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
531 "ISIS-Adj (%s): Rcvd L%d LAN IIH from %s on %s, cirType %s, cirID %u, length %zd",
532 iih
->circuit
->area
->area_tag
, iih
->level
,
533 snpa_print(iih
->ssnpa
), iih
->circuit
->interface
->name
,
534 circuit_t2string(iih
->circuit
->is_type
),
535 iih
->circuit
->circuit_id
,
536 stream_get_endp(iih
->circuit
->rcv_stream
));
541 static int pdu_len_validate(uint16_t pdu_len
, struct isis_circuit
*circuit
)
543 if (pdu_len
< stream_get_getp(circuit
->rcv_stream
)
544 || pdu_len
> ISO_MTU(circuit
)
545 || pdu_len
> stream_get_endp(circuit
->rcv_stream
))
548 if (pdu_len
< stream_get_endp(circuit
->rcv_stream
))
549 stream_set_endp(circuit
->rcv_stream
, pdu_len
);
553 static int process_hello(uint8_t pdu_type
, struct isis_circuit
*circuit
,
556 /* keep a copy of the raw pdu for NB notifications */
557 size_t pdu_start
= stream_get_getp(circuit
->rcv_stream
);
558 size_t pdu_end
= stream_get_endp(circuit
->rcv_stream
);
559 char raw_pdu
[pdu_end
- pdu_start
];
560 bool p2p_hello
= (pdu_type
== P2P_HELLO
);
561 int level
= p2p_hello
? 0
562 : (pdu_type
== L1_LAN_HELLO
) ? ISIS_LEVEL1
564 const char *pdu_name
=
567 : (level
== ISIS_LEVEL1
) ? "L1 LAN IIH" : "L2 LAN IIH";
570 stream_get_from(raw_pdu
, circuit
->rcv_stream
, pdu_start
,
571 pdu_end
- pdu_start
);
572 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
573 zlog_debug("ISIS-Adj (%s): Rcvd %s on %s, cirType %s, cirID %u",
574 circuit
->area
->area_tag
, pdu_name
,
575 circuit
->interface
->name
,
576 circuit_t2string(circuit
->is_type
),
577 circuit
->circuit_id
);
578 if (isis
->debugs
& DEBUG_PACKET_DUMP
)
579 zlog_dump_data(STREAM_DATA(circuit
->rcv_stream
),
580 stream_get_endp(circuit
->rcv_stream
));
584 if (circuit
->circ_type
!= CIRCUIT_T_P2P
) {
585 zlog_warn("p2p hello on non p2p circuit");
587 isis_notif_reject_adjacency(
588 circuit
, "p2p hello on non p2p circuit",
590 #endif /* ifndef FABRICD */
594 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
) {
595 zlog_warn("lan hello on non broadcast circuit");
597 isis_notif_reject_adjacency(
598 circuit
, "lan hello on non broadcast circuit",
600 #endif /* ifndef FABRICD */
604 if (circuit
->ext_domain
) {
606 "level %d LAN Hello received over circuit with externalDomain = true",
609 isis_notif_reject_adjacency(
611 "LAN Hello received over circuit with externalDomain = true",
613 #endif /* ifndef FABRICD */
617 if (!(circuit
->is_type
& level
)) {
618 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
620 "ISIS-Adj (%s): Interface level mismatch, %s",
621 circuit
->area
->area_tag
,
622 circuit
->interface
->name
);
625 isis_notif_reject_adjacency(
626 circuit
, "Interface level mismatch", raw_pdu
);
627 #endif /* ifndef FABRICD */
632 struct iih_info iih
= {
633 .circuit
= circuit
, .ssnpa
= ssnpa
, .level
= level
};
635 /* Generic IIH Header */
636 iih
.circ_type
= stream_getc(circuit
->rcv_stream
) & 0x03;
637 stream_get(iih
.sys_id
, circuit
->rcv_stream
, ISIS_SYS_ID_LEN
);
638 iih
.holdtime
= stream_getw(circuit
->rcv_stream
);
639 iih
.pdu_len
= stream_getw(circuit
->rcv_stream
);
642 iih
.circuit_id
= stream_getc(circuit
->rcv_stream
);
644 iih
.priority
= stream_getc(circuit
->rcv_stream
);
645 stream_get(iih
.dis
, circuit
->rcv_stream
, ISIS_SYS_ID_LEN
+ 1);
648 if (pdu_len_validate(iih
.pdu_len
, circuit
)) {
650 "ISIS-Adj (%s): Rcvd %s from (%s) with invalid pdu length %" PRIu16
,
651 circuit
->area
->area_tag
, pdu_name
,
652 circuit
->interface
->name
, iih
.pdu_len
);
654 isis_notif_reject_adjacency(circuit
, "Invalid PDU length",
656 #endif /* ifndef FABRICD */
660 if (!p2p_hello
&& !(level
& iih
.circ_type
)) {
661 flog_err(EC_ISIS_PACKET
,
662 "Level %d LAN Hello with Circuit Type %d", level
,
665 isis_notif_reject_adjacency(
666 circuit
, "LAN Hello with wrong IS-level", raw_pdu
);
667 #endif /* ifndef FABRICD */
671 const char *error_log
;
672 int retval
= ISIS_WARNING
;
674 if (isis_unpack_tlvs(STREAM_READABLE(circuit
->rcv_stream
),
675 circuit
->rcv_stream
, &iih
.tlvs
, &error_log
)) {
676 zlog_warn("isis_unpack_tlvs() failed: %s", error_log
);
678 isis_notif_reject_adjacency(circuit
, "Failed to unpack TLVs",
680 #endif /* ifndef FABRICD */
684 if (!iih
.tlvs
->area_addresses
.count
) {
685 zlog_warn("No Area addresses TLV in %s", pdu_name
);
687 /* send northbound notification */
688 isis_notif_area_mismatch(circuit
, raw_pdu
);
689 #endif /* ifndef FABRICD */
693 if (!iih
.tlvs
->protocols_supported
.count
) {
694 zlog_warn("No supported protocols TLV in %s", pdu_name
);
696 isis_notif_reject_adjacency(
697 circuit
, "No supported protocols TLV", raw_pdu
);
698 #endif /* ifndef FABRICD */
702 int auth_code
= isis_tlvs_auth_is_valid(iih
.tlvs
, &circuit
->passwd
,
703 circuit
->rcv_stream
, false);
704 if (auth_code
!= ISIS_AUTH_OK
) {
705 isis_event_auth_failure(circuit
->area
->area_tag
,
706 "IIH authentication failure",
709 /* send northbound notification */
710 stream_get_from(raw_pdu
, circuit
->rcv_stream
, pdu_start
,
711 pdu_end
- pdu_start
);
712 if (auth_code
== ISIS_AUTH_FAILURE
)
713 isis_notif_authentication_failure(circuit
, raw_pdu
);
714 else /* AUTH_TYPE_FAILURE or NO_VALIDATOR */
715 isis_notif_authentication_type_failure(circuit
,
717 #endif /* ifndef FABRICD */
721 if (!memcmp(iih
.sys_id
, isis
->sysid
, ISIS_SYS_ID_LEN
)) {
723 "ISIS-Adj (%s): Received IIH with own sysid - discard",
724 circuit
->area
->area_tag
);
726 isis_notif_reject_adjacency(
727 circuit
, "Received IIH with our own sysid", raw_pdu
);
728 #endif /* ifndef FABRICD */
733 && (listcount(circuit
->area
->area_addrs
) == 0
734 || (level
== ISIS_LEVEL1
735 && !isis_tlvs_area_addresses_match(
736 iih
.tlvs
, circuit
->area
->area_addrs
)))) {
737 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
739 "ISIS-Adj (%s): Area mismatch, level %d IIH on %s",
740 circuit
->area
->area_tag
, level
,
741 circuit
->interface
->name
);
744 /* send northbound notification */
745 isis_notif_area_mismatch(circuit
, raw_pdu
);
746 #endif /* ifndef FABRICD */
750 iih
.v4_usable
= (fabricd_ip_addrs(circuit
)
751 && iih
.tlvs
->ipv4_address
.count
);
753 iih
.v6_usable
= (circuit
->ipv6_link
&& listcount(circuit
->ipv6_link
)
754 && iih
.tlvs
->ipv6_address
.count
);
756 if (!iih
.v4_usable
&& !iih
.v6_usable
) {
757 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
759 "ISIS-Adj (%s): Neither IPv4 nor IPv6 considered usable. Ignoring IIH",
760 circuit
->area
->area_tag
);
763 isis_notif_reject_adjacency(
764 circuit
, "Neither IPv4 not IPv6 considered usable",
766 #endif /* ifndef FABRICD */
770 retval
= p2p_hello
? process_p2p_hello(&iih
) : process_lan_hello(&iih
);
772 isis_free_tlvs(iih
.tlvs
);
777 static void lsp_flood_or_update(struct isis_lsp
*lsp
,
778 struct isis_circuit
*circuit
,
782 lsp_flood(lsp
, circuit
);
784 fabricd_update_lsp_no_flood(lsp
, circuit
);
788 * Process Level 1/2 Link State
790 * Section 7.3.15.1 - Action on receipt of a link state PDU
792 static int process_lsp(uint8_t pdu_type
, struct isis_circuit
*circuit
,
793 const uint8_t *ssnpa
, uint8_t max_area_addrs
)
797 size_t pdu_start
= stream_get_getp(circuit
->rcv_stream
);
798 size_t pdu_end
= stream_get_endp(circuit
->rcv_stream
);
799 char raw_pdu
[pdu_end
- pdu_start
];
801 stream_get_from(raw_pdu
, circuit
->rcv_stream
, pdu_start
,
802 pdu_end
- pdu_start
);
804 if (pdu_type
== FS_LINK_STATE
) {
807 if (max_area_addrs
!= L2_CIRCUIT_FLOODING_SCOPE
)
810 circuit_scoped
= true;
812 /* The stream is used verbatim for sending out new LSPDUs.
813 * So make sure we store it as an L2 LSPDU internally.
814 * (compare for the reverse in `send_lsp`) */
815 stream_putc_at(circuit
->rcv_stream
, 4, L2_LINK_STATE
);
816 stream_putc_at(circuit
->rcv_stream
, 7, 0);
818 if (pdu_type
== L1_LINK_STATE
)
822 circuit_scoped
= false;
825 if (isis
->debugs
& DEBUG_UPDATE_PACKETS
) {
827 "ISIS-Upd (%s): Rcvd %sL%d LSP on %s, cirType %s, cirID %u",
828 circuit
->area
->area_tag
,
829 circuit_scoped
? "Circuit scoped " : "", level
,
830 circuit
->interface
->name
,
831 circuit_t2string(circuit
->is_type
),
832 circuit
->circuit_id
);
833 if (isis
->debugs
& DEBUG_PACKET_DUMP
)
834 zlog_dump_data(STREAM_DATA(circuit
->rcv_stream
),
835 stream_get_endp(circuit
->rcv_stream
));
838 struct isis_lsp_hdr hdr
= {};
840 hdr
.pdu_len
= stream_getw(circuit
->rcv_stream
);
841 hdr
.rem_lifetime
= stream_getw(circuit
->rcv_stream
);
842 stream_get(hdr
.lsp_id
, circuit
->rcv_stream
, sizeof(hdr
.lsp_id
));
843 hdr
.seqno
= stream_getl(circuit
->rcv_stream
);
844 hdr
.checksum
= stream_getw(circuit
->rcv_stream
);
845 hdr
.lsp_bits
= stream_getc(circuit
->rcv_stream
);
848 /* send northbound notification */
849 isis_notif_lsp_received(circuit
, rawlspid_print(hdr
.lsp_id
), hdr
.seqno
,
850 time(NULL
), sysid_print(hdr
.lsp_id
));
851 #endif /* ifndef FABRICD */
853 if (pdu_len_validate(hdr
.pdu_len
, circuit
)) {
854 zlog_debug("ISIS-Upd (%s): LSP %s invalid LSP length %" PRIu16
,
855 circuit
->area
->area_tag
, rawlspid_print(hdr
.lsp_id
),
860 if (isis
->debugs
& DEBUG_UPDATE_PACKETS
) {
861 zlog_debug("ISIS-Upd (%s): Rcvd L%d LSP %s, seq 0x%08" PRIx32
862 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
863 "s, len %" PRIu16
", on %s",
864 circuit
->area
->area_tag
, level
,
865 rawlspid_print(hdr
.lsp_id
), hdr
.seqno
, hdr
.checksum
,
866 hdr
.rem_lifetime
, hdr
.pdu_len
,
867 circuit
->interface
->name
);
870 /* lsp is_type check */
871 if ((hdr
.lsp_bits
& IS_LEVEL_1
) != IS_LEVEL_1
) {
873 "ISIS-Upd (%s): LSP %s invalid LSP is type 0x%" PRIx8
,
874 circuit
->area
->area_tag
, rawlspid_print(hdr
.lsp_id
),
875 hdr
.lsp_bits
& IS_LEVEL_1_AND_2
);
876 /* continue as per RFC1122 Be liberal in what you accept, and
877 * conservative in what you send */
880 /* Checksum sanity check - FIXME: move to correct place */
881 /* 12 = sysid+pdu+remtime */
882 if (iso_csum_verify(STREAM_DATA(circuit
->rcv_stream
) + 12,
883 hdr
.pdu_len
- 12, hdr
.checksum
, 12)) {
885 "ISIS-Upd (%s): LSP %s invalid LSP checksum 0x%04" PRIx16
,
886 circuit
->area
->area_tag
, rawlspid_print(hdr
.lsp_id
),
891 /* 7.3.15.1 a) 1 - external domain circuit will discard lsps */
892 if (circuit
->ext_domain
) {
894 "ISIS-Upd (%s): LSP %s received at level %d over circuit with "
895 "externalDomain = true",
896 circuit
->area
->area_tag
, rawlspid_print(hdr
.lsp_id
),
901 /* 7.3.15.1 a) 2,3 - manualL2OnlyMode not implemented */
902 if (!(circuit
->is_type
& level
)) {
904 "ISIS-Upd (%s): LSP %s received at level %d over circuit of"
906 circuit
->area
->area_tag
, rawlspid_print(hdr
.lsp_id
),
907 level
, circuit_t2string(circuit
->is_type
));
911 struct isis_tlvs
*tlvs
= NULL
;
912 int retval
= ISIS_WARNING
;
913 const char *error_log
;
915 if (isis_unpack_tlvs(STREAM_READABLE(circuit
->rcv_stream
),
916 circuit
->rcv_stream
, &tlvs
, &error_log
)) {
917 zlog_warn("Something went wrong unpacking the LSP: %s",
922 /* 7.3.15.1 a) 4 - need to make sure IDLength matches */
924 /* 7.3.15.1 a) 5 - maximum area match, can be ommited since we only use
927 /* 7.3.15.1 a) 7 - password check */
928 struct isis_passwd
*passwd
= (level
== ISIS_LEVEL1
)
929 ? &circuit
->area
->area_passwd
930 : &circuit
->area
->domain_passwd
;
931 int auth_code
= isis_tlvs_auth_is_valid(tlvs
, passwd
,
932 circuit
->rcv_stream
, true);
933 if (auth_code
!= ISIS_AUTH_OK
) {
934 isis_event_auth_failure(circuit
->area
->area_tag
,
935 "LSP authentication failure",
938 /* send northbound notification */
939 if (auth_code
== ISIS_AUTH_FAILURE
)
940 isis_notif_authentication_failure(circuit
, raw_pdu
);
941 else /* AUTH_TYPE_FAILURE or NO_VALIDATOR */
942 isis_notif_authentication_type_failure(circuit
,
944 #endif /* ifndef FABRICD */
948 /* Find the LSP in our database and compare it to this Link State header
950 struct isis_lsp
*lsp
=
951 lsp_search(hdr
.lsp_id
, circuit
->area
->lspdb
[level
- 1]);
954 comp
= lsp_compare(circuit
->area
->area_tag
, lsp
, hdr
.seqno
,
955 hdr
.checksum
, hdr
.rem_lifetime
);
956 if (lsp
&& (lsp
->own_lsp
))
959 /* 7.3.15.1 a) 6 - Must check that we have an adjacency of the same
961 /* for broadcast circuits, snpa should be compared */
963 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
) {
964 if (!isis_adj_lookup_snpa(ssnpa
,
965 circuit
->u
.bc
.adjdb
[level
- 1])) {
966 zlog_debug("(%s): DS ======= LSP %s, seq 0x%08" PRIx32
967 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
969 circuit
->area
->area_tag
,
970 rawlspid_print(hdr
.lsp_id
), hdr
.seqno
,
971 hdr
.checksum
, hdr
.rem_lifetime
,
972 circuit
->interface
->name
);
973 goto out
; /* Silently discard */
976 /* for non broadcast, we just need to find same level adj */
978 /* If no adj, or no sharing of level */
979 if (!circuit
->u
.p2p
.neighbor
) {
983 if (((level
== IS_LEVEL_1
)
984 && (circuit
->u
.p2p
.neighbor
->adj_usage
986 || ((level
== IS_LEVEL_2
)
987 && (circuit
->u
.p2p
.neighbor
->adj_usage
988 == ISIS_ADJ_LEVEL1
)))
996 /* 7.3.15.1 a) 7 - Passwords for level 1 - not implemented */
998 /* 7.3.15.1 a) 8 - Passwords for level 2 - not implemented */
1000 /* 7.3.15.1 a) 9 - OriginatingLSPBufferSize - not implemented FIXME: do
1003 /* 7.3.16.2 - If this is an LSP from another IS with identical seq_num
1005 * wrong checksum, initiate a purge. */
1006 if (lsp
&& (lsp
->hdr
.seqno
== hdr
.seqno
)
1007 && (lsp
->hdr
.checksum
!= hdr
.checksum
)
1008 && hdr
.rem_lifetime
) {
1009 zlog_warn("ISIS-Upd (%s): LSP %s seq 0x%08" PRIx32
1010 " with confused checksum received.",
1011 circuit
->area
->area_tag
, rawlspid_print(hdr
.lsp_id
),
1013 hdr
.rem_lifetime
= 0;
1014 lsp_confusion
= true;
1016 lsp_confusion
= false;
1018 /* 7.3.15.1 b) - If the remaining life time is 0, we perform 7.3.16.4 */
1019 if (hdr
.rem_lifetime
== 0) {
1021 /* 7.3.16.4 a) 1) No LSP in db -> send an ack, but don't
1023 /* only needed on explicit update, eg - p2p */
1024 if (circuit
->circ_type
== CIRCUIT_T_P2P
)
1025 ack_lsp(&hdr
, circuit
, level
);
1026 goto out
; /* FIXME: do we need a purge? */
1028 if (memcmp(hdr
.lsp_id
, isis
->sysid
, ISIS_SYS_ID_LEN
)) {
1029 /* LSP by some other system -> do 7.3.16.4 b) */
1030 /* 7.3.16.4 b) 1) */
1031 if (comp
== LSP_NEWER
) {
1032 lsp_update(lsp
, &hdr
, tlvs
,
1033 circuit
->rcv_stream
,
1034 circuit
->area
, level
,
1038 lsp_flood_or_update(lsp
, NULL
,
1041 ISIS_FLAGS_CLEAR_ALL(
1042 lsp
->SSNflags
); /* FIXME:
1047 /* For the case of lsp confusion, flood
1048 * the purge back to its
1049 * originator so that it can react.
1050 * Otherwise, don't reflood
1051 * through incoming circuit as usual */
1052 if (!lsp_confusion
) {
1058 if (circuit
->circ_type
1059 != CIRCUIT_T_BROADCAST
)
1064 } /* 7.3.16.4 b) 2) */
1065 else if (comp
== LSP_EQUAL
) {
1067 isis_tx_queue_del(circuit
->tx_queue
,
1070 if (circuit
->circ_type
1071 != CIRCUIT_T_BROADCAST
)
1072 ISIS_SET_FLAG(lsp
->SSNflags
,
1074 } /* 7.3.16.4 b) 3) */
1076 isis_tx_queue_add(circuit
->tx_queue
,
1077 lsp
, TX_LSP_NORMAL
);
1078 ISIS_CLEAR_FLAG(lsp
->SSNflags
, circuit
);
1080 } else if (lsp
->hdr
.rem_lifetime
!= 0) {
1081 /* our own LSP -> 7.3.16.4 c) */
1082 if (comp
== LSP_NEWER
) {
1083 lsp_inc_seqno(lsp
, hdr
.seqno
);
1084 lsp_flood_or_update(lsp
, NULL
,
1087 isis_tx_queue_add(circuit
->tx_queue
,
1088 lsp
, TX_LSP_NORMAL
);
1089 ISIS_CLEAR_FLAG(lsp
->SSNflags
, circuit
);
1091 if (isis
->debugs
& DEBUG_UPDATE_PACKETS
)
1093 "ISIS-Upd (%s): (1) "
1094 "re-originating LSP %s new seq "
1096 circuit
->area
->area_tag
,
1097 rawlspid_print(hdr
.lsp_id
),
1103 /* 7.3.15.1 c) - If this is our own lsp and we don't have it initiate a
1105 if (memcmp(hdr
.lsp_id
, isis
->sysid
, ISIS_SYS_ID_LEN
) == 0) {
1107 /* 7.3.16.4: initiate a purge */
1108 lsp_purge_non_exist(level
, &hdr
, circuit
->area
);
1112 /* 7.3.15.1 d) - If this is our own lsp and we have it */
1114 /* In 7.3.16.1, If an Intermediate system R somewhere in the
1116 * has information that the current sequence number for source S
1118 * "greater" than that held by S, ... */
1120 if (comp
== LSP_NEWER
) {
1122 lsp_inc_seqno(lsp
, hdr
.seqno
);
1123 if (isis
->debugs
& DEBUG_UPDATE_PACKETS
) {
1125 "ISIS-Upd (%s): (2) re-originating LSP %s new seq 0x%08" PRIx32
,
1126 circuit
->area
->area_tag
,
1127 rawlspid_print(hdr
.lsp_id
),
1130 lsp_flood(lsp
, NULL
);
1131 } else if (comp
== LSP_EQUAL
) {
1132 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
1133 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1134 ISIS_SET_FLAG(lsp
->SSNflags
, circuit
);
1136 isis_tx_queue_add(circuit
->tx_queue
, lsp
,
1138 ISIS_CLEAR_FLAG(lsp
->SSNflags
, circuit
);
1141 /* 7.3.15.1 e) - This lsp originated on another system */
1143 /* 7.3.15.1 e) 1) LSP newer than the one in db or no LSP in db
1145 if ((!lsp
|| comp
== LSP_NEWER
)) {
1147 * If this lsp is a frag, need to see if we have zero
1150 struct isis_lsp
*lsp0
= NULL
;
1151 if (LSP_FRAGMENT(hdr
.lsp_id
) != 0) {
1152 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
1153 memcpy(lspid
, hdr
.lsp_id
, ISIS_SYS_ID_LEN
+ 1);
1154 LSP_FRAGMENT(lspid
) = 0;
1156 lspid
, circuit
->area
->lspdb
[level
- 1]);
1159 "Got lsp frag, while zero lsp not in database");
1165 lsp
= lsp_new_from_recv(
1166 &hdr
, tlvs
, circuit
->rcv_stream
, lsp0
,
1167 circuit
->area
, level
);
1170 circuit
->area
->lspdb
[level
- 1]);
1171 } else /* exists, so we overwrite */
1173 lsp_update(lsp
, &hdr
, tlvs
, circuit
->rcv_stream
,
1174 circuit
->area
, level
, false);
1177 lsp_flood_or_update(lsp
, circuit
, circuit_scoped
);
1180 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1181 ISIS_SET_FLAG(lsp
->SSNflags
, circuit
);
1184 /* 7.3.15.1 e) 2) LSP equal to the one in db */
1185 else if (comp
== LSP_EQUAL
) {
1186 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
1187 lsp_update(lsp
, &hdr
, tlvs
, circuit
->rcv_stream
,
1188 circuit
->area
, level
, false);
1190 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
)
1191 ISIS_SET_FLAG(lsp
->SSNflags
, circuit
);
1193 /* 7.3.15.1 e) 3) LSP older than the one in db */
1195 isis_tx_queue_add(circuit
->tx_queue
, lsp
,
1197 ISIS_CLEAR_FLAG(lsp
->SSNflags
, circuit
);
1204 fabricd_trigger_csnp(circuit
->area
, circuit_scoped
);
1206 isis_free_tlvs(tlvs
);
1211 * Process Sequence Numbers
1213 * Section 7.3.15.2 - Action on receipt of a sequence numbers PDU
1216 static int process_snp(uint8_t pdu_type
, struct isis_circuit
*circuit
,
1217 const uint8_t *ssnpa
)
1220 size_t pdu_start
= stream_get_getp(circuit
->rcv_stream
);
1221 size_t pdu_end
= stream_get_endp(circuit
->rcv_stream
);
1222 char raw_pdu
[pdu_end
- pdu_start
];
1223 #endif /* ifndef FABRICD */
1225 bool is_csnp
= (pdu_type
== L1_COMPLETE_SEQ_NUM
1226 || pdu_type
== L2_COMPLETE_SEQ_NUM
);
1227 char typechar
= is_csnp
? 'C' : 'P';
1228 int level
= (pdu_type
== L1_COMPLETE_SEQ_NUM
1229 || pdu_type
== L1_PARTIAL_SEQ_NUM
)
1233 uint16_t pdu_len
= stream_getw(circuit
->rcv_stream
);
1234 uint8_t rem_sys_id
[ISIS_SYS_ID_LEN
];
1236 stream_get(rem_sys_id
, circuit
->rcv_stream
, ISIS_SYS_ID_LEN
);
1237 stream_forward_getp(circuit
->rcv_stream
, 1); /* Circuit ID - unused */
1239 uint8_t start_lsp_id
[ISIS_SYS_ID_LEN
+ 2] = {};
1240 uint8_t stop_lsp_id
[ISIS_SYS_ID_LEN
+ 2] = {};
1243 stream_get(start_lsp_id
, circuit
->rcv_stream
,
1244 ISIS_SYS_ID_LEN
+ 2);
1245 stream_get(stop_lsp_id
, circuit
->rcv_stream
,
1246 ISIS_SYS_ID_LEN
+ 2);
1249 if (pdu_len_validate(pdu_len
, circuit
)) {
1250 zlog_warn("Received a CSNP with bogus length %d", pdu_len
);
1251 return ISIS_WARNING
;
1254 if (isis
->debugs
& DEBUG_SNP_PACKETS
) {
1256 "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, cirType %s, cirID %u",
1257 circuit
->area
->area_tag
, level
, typechar
,
1258 circuit
->interface
->name
,
1259 circuit_t2string(circuit
->is_type
),
1260 circuit
->circuit_id
);
1261 if (isis
->debugs
& DEBUG_PACKET_DUMP
)
1262 zlog_dump_data(STREAM_DATA(circuit
->rcv_stream
),
1263 stream_get_endp(circuit
->rcv_stream
));
1266 /* 7.3.15.2 a) 1 - external domain circuit will discard snp pdu */
1267 if (circuit
->ext_domain
) {
1270 "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, "
1271 "skipping: circuit externalDomain = true",
1272 circuit
->area
->area_tag
, level
, typechar
,
1273 circuit
->interface
->name
);
1278 /* 7.3.15.2 a) 2,3 - manualL2OnlyMode not implemented */
1279 if (!(circuit
->is_type
& level
)) {
1281 "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, "
1282 "skipping: circuit type %s does not match level %d",
1283 circuit
->area
->area_tag
, level
, typechar
,
1284 circuit
->interface
->name
,
1285 circuit_t2string(circuit
->is_type
), level
);
1290 /* 7.3.15.2 a) 4 - not applicable for CSNP only PSNPs on broadcast */
1291 if (!is_csnp
&& (circuit
->circ_type
== CIRCUIT_T_BROADCAST
)
1292 && !circuit
->u
.bc
.is_dr
[level
- 1]) {
1294 "ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s, "
1295 "skipping: we are not the DIS",
1296 circuit
->area
->area_tag
, level
, typechar
,
1297 snpa_print(ssnpa
), circuit
->interface
->name
);
1302 /* 7.3.15.2 a) 5 - need to make sure IDLength matches - already checked
1305 /* 7.3.15.2 a) 6 - maximum area match, can be ommited since we only use
1307 * - already checked */
1309 /* 7.3.15.2 a) 7 - Must check that we have an adjacency of the same
1311 /* for broadcast circuits, snpa should be compared */
1312 /* FIXME : Do we need to check SNPA? */
1313 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
) {
1314 if (!isis_adj_lookup(rem_sys_id
,
1315 circuit
->u
.bc
.adjdb
[level
- 1]))
1316 return ISIS_OK
; /* Silently discard */
1318 if (!fabricd
&& !circuit
->u
.p2p
.neighbor
) {
1319 zlog_warn("no p2p neighbor on circuit %s",
1320 circuit
->interface
->name
);
1321 return ISIS_OK
; /* Silently discard */
1325 struct isis_tlvs
*tlvs
;
1326 int retval
= ISIS_WARNING
;
1327 const char *error_log
;
1329 if (isis_unpack_tlvs(STREAM_READABLE(circuit
->rcv_stream
),
1330 circuit
->rcv_stream
, &tlvs
, &error_log
)) {
1331 zlog_warn("Something went wrong unpacking the SNP: %s",
1336 struct isis_passwd
*passwd
= (level
== IS_LEVEL_1
)
1337 ? &circuit
->area
->area_passwd
1338 : &circuit
->area
->domain_passwd
;
1339 if (CHECK_FLAG(passwd
->snp_auth
, SNP_AUTH_RECV
)) {
1340 int auth_code
= isis_tlvs_auth_is_valid(
1341 tlvs
, passwd
, circuit
->rcv_stream
, false);
1342 if (auth_code
!= ISIS_AUTH_OK
) {
1343 isis_event_auth_failure(circuit
->area
->area_tag
,
1344 "SNP authentication failure",
1347 /* send northbound notification */
1348 stream_get_from(raw_pdu
, circuit
->rcv_stream
, pdu_start
,
1349 pdu_end
- pdu_start
);
1350 if (auth_code
== ISIS_AUTH_FAILURE
)
1351 isis_notif_authentication_failure(circuit
,
1353 else /* AUTH_TYPE_FAILURE or NO_VALIDATOR */
1354 isis_notif_authentication_type_failure(circuit
,
1356 #endif /* ifndef FABRICD */
1361 struct isis_lsp_entry
*entry_head
=
1362 (struct isis_lsp_entry
*)tlvs
->lsp_entries
.head
;
1364 /* debug isis snp-packets */
1365 if (isis
->debugs
& DEBUG_SNP_PACKETS
) {
1366 zlog_debug("ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s",
1367 circuit
->area
->area_tag
, level
, typechar
,
1368 snpa_print(ssnpa
), circuit
->interface
->name
);
1369 for (struct isis_lsp_entry
*entry
= entry_head
; entry
;
1370 entry
= entry
->next
) {
1372 "ISIS-Snp (%s): %cSNP entry %s, seq 0x%08" PRIx32
1373 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
"s",
1374 circuit
->area
->area_tag
, typechar
,
1375 rawlspid_print(entry
->id
), entry
->seqno
,
1376 entry
->checksum
, entry
->rem_lifetime
);
1380 bool resync_needed
= false;
1382 /* 7.3.15.2 b) Actions on LSP_ENTRIES reported */
1383 for (struct isis_lsp_entry
*entry
= entry_head
; entry
;
1384 entry
= entry
->next
) {
1385 struct isis_lsp
*lsp
=
1386 lsp_search(entry
->id
, circuit
->area
->lspdb
[level
- 1]);
1387 bool own_lsp
= !memcmp(entry
->id
, isis
->sysid
, ISIS_SYS_ID_LEN
);
1389 /* 7.3.15.2 b) 1) is this LSP newer */
1390 int cmp
= lsp_compare(circuit
->area
->area_tag
, lsp
,
1391 entry
->seqno
, entry
->checksum
,
1392 entry
->rem_lifetime
);
1393 /* 7.3.15.2 b) 2) if it equals, clear SRM on p2p */
1394 if (cmp
== LSP_EQUAL
) {
1395 /* if (circuit->circ_type !=
1396 * CIRCUIT_T_BROADCAST) */
1397 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
1399 /* 7.3.15.2 b) 3) if it is older, clear SSN and set SRM
1401 else if (cmp
== LSP_OLDER
) {
1402 ISIS_CLEAR_FLAG(lsp
->SSNflags
, circuit
);
1403 isis_tx_queue_add(circuit
->tx_queue
, lsp
,
1406 /* 7.3.15.2 b) 4) if it is newer, set SSN and clear SRM
1410 lsp_inc_seqno(lsp
, entry
->seqno
);
1411 isis_tx_queue_add(circuit
->tx_queue
, lsp
,
1414 ISIS_SET_FLAG(lsp
->SSNflags
, circuit
);
1415 /* if (circuit->circ_type !=
1416 * CIRCUIT_T_BROADCAST) */
1417 isis_tx_queue_del(circuit
->tx_queue
, lsp
);
1418 resync_needed
= true;
1422 /* 7.3.15.2 b) 5) if it was not found, and all of those
1424 * insert it and set SSN on it */
1425 if (entry
->rem_lifetime
&& entry
->checksum
1426 && entry
->seqno
&& memcmp(entry
->id
, isis
->sysid
,
1428 struct isis_lsp
*lsp0
= NULL
;
1430 if (LSP_FRAGMENT(entry
->id
)) {
1431 uint8_t lspid
[ISIS_SYS_ID_LEN
+ 2];
1433 memcpy(lspid
, entry
->id
,
1434 ISIS_SYS_ID_LEN
+ 1);
1435 LSP_FRAGMENT(lspid
) = 0;
1438 circuit
->area
->lspdb
[level
- 1]);
1440 zlog_debug("Got lsp frag in snp, while zero not in database");
1444 lsp
= lsp_new(circuit
->area
, entry
->id
,
1445 entry
->rem_lifetime
, 0, 0,
1446 entry
->checksum
, lsp0
, level
);
1448 circuit
->area
->lspdb
[level
- 1]);
1450 lsp_set_all_srmflags(lsp
, false);
1451 ISIS_SET_FLAG(lsp
->SSNflags
, circuit
);
1452 resync_needed
= true;
1457 /* 7.3.15.2 c) on CSNP set SRM for all in range which were not reported
1461 * Build a list from our own LSP db bounded with
1462 * start_lsp_id and stop_lsp_id
1464 struct list
*lsp_list
= list_new();
1465 lsp_build_list_nonzero_ht(start_lsp_id
, stop_lsp_id
, lsp_list
,
1466 circuit
->area
->lspdb
[level
- 1]);
1468 /* Fixme: Find a better solution */
1469 struct listnode
*node
, *nnode
;
1470 struct isis_lsp
*lsp
;
1471 for (struct isis_lsp_entry
*entry
= entry_head
; entry
;
1472 entry
= entry
->next
) {
1473 for (ALL_LIST_ELEMENTS(lsp_list
, node
, nnode
, lsp
)) {
1474 if (lsp_id_cmp(lsp
->hdr
.lsp_id
, entry
->id
)
1476 list_delete_node(lsp_list
, node
);
1482 /* on remaining LSPs we set SRM (neighbor knew not of) */
1483 for (ALL_LIST_ELEMENTS_RO(lsp_list
, node
, lsp
)) {
1484 isis_tx_queue_add(circuit
->tx_queue
, lsp
, TX_LSP_NORMAL
);
1485 resync_needed
= true;
1489 list_delete(&lsp_list
);
1492 if (fabricd_initial_sync_is_complete(circuit
->area
) && resync_needed
)
1493 zlog_warn("OpenFabric: Needed to resync LSPDB using CSNP!\n");
1497 isis_free_tlvs(tlvs
);
1501 static int pdu_size(uint8_t pdu_type
, uint8_t *size
)
1506 *size
= ISIS_LANHELLO_HDRLEN
;
1509 *size
= ISIS_P2PHELLO_HDRLEN
;
1514 *size
= ISIS_LSP_HDR_LEN
;
1516 case L1_COMPLETE_SEQ_NUM
:
1517 case L2_COMPLETE_SEQ_NUM
:
1518 *size
= ISIS_CSNP_HDRLEN
;
1520 case L1_PARTIAL_SEQ_NUM
:
1521 case L2_PARTIAL_SEQ_NUM
:
1522 *size
= ISIS_PSNP_HDRLEN
;
1527 *size
+= ISIS_FIXED_HDR_LEN
;
1535 int isis_handle_pdu(struct isis_circuit
*circuit
, uint8_t *ssnpa
)
1537 int retval
= ISIS_OK
;
1538 size_t pdu_start
= stream_get_getp(circuit
->rcv_stream
);
1539 size_t pdu_end
= stream_get_endp(circuit
->rcv_stream
);
1540 char raw_pdu
[pdu_end
- pdu_start
];
1542 stream_get_from(raw_pdu
, circuit
->rcv_stream
, pdu_start
,
1543 pdu_end
- pdu_start
);
1545 /* Verify that at least the 8 bytes fixed header have been received */
1546 if (stream_get_endp(circuit
->rcv_stream
) < ISIS_FIXED_HDR_LEN
) {
1547 flog_err(EC_ISIS_PACKET
, "PDU is too short to be IS-IS.");
1551 uint8_t idrp
= stream_getc(circuit
->rcv_stream
);
1552 uint8_t length
= stream_getc(circuit
->rcv_stream
);
1553 uint8_t version1
= stream_getc(circuit
->rcv_stream
);
1554 uint8_t id_len
= stream_getc(circuit
->rcv_stream
);
1555 uint8_t pdu_type
= stream_getc(circuit
->rcv_stream
)
1556 & 0x1f; /* bits 6-8 are reserved */
1557 uint8_t version2
= stream_getc(circuit
->rcv_stream
);
1559 stream_forward_getp(circuit
->rcv_stream
, 1); /* reserved */
1560 uint8_t max_area_addrs
= stream_getc(circuit
->rcv_stream
);
1562 pdu_counter_count(circuit
->area
->pdu_rx_counters
, pdu_type
);
1564 if (idrp
== ISO9542_ESIS
) {
1565 flog_err(EC_LIB_DEVELOPMENT
,
1566 "No support for ES-IS packet IDRP=%" PRIx8
, idrp
);
1570 if (idrp
!= ISO10589_ISIS
) {
1571 flog_err(EC_ISIS_PACKET
, "Not an IS-IS packet IDRP=%" PRIx8
,
1576 if (version1
!= 1) {
1577 zlog_warn("Unsupported ISIS version %" PRIu8
, version1
);
1578 return ISIS_WARNING
;
1581 if (id_len
!= 0 && id_len
!= ISIS_SYS_ID_LEN
) {
1584 "IDFieldLengthMismatch: ID Length field in a received PDU %" PRIu8
1585 ", while the parameter for this IS is %u",
1586 id_len
, ISIS_SYS_ID_LEN
);
1590 uint8_t expected_length
;
1591 if (pdu_size(pdu_type
, &expected_length
)) {
1592 zlog_warn("Unsupported ISIS PDU %" PRIu8
, pdu_type
);
1593 return ISIS_WARNING
;
1596 if (length
!= expected_length
) {
1597 flog_err(EC_ISIS_PACKET
,
1598 "Exepected fixed header length = %" PRIu8
1600 expected_length
, length
);
1604 if (stream_get_endp(circuit
->rcv_stream
) < length
) {
1607 "PDU is too short to contain fixed header of given PDU type.");
1611 if (version2
!= 1) {
1612 zlog_warn("Unsupported ISIS PDU version %" PRIu8
, version2
);
1613 return ISIS_WARNING
;
1616 if (circuit
->is_passive
) {
1617 zlog_warn("Received ISIS PDU on passive circuit %s",
1618 circuit
->interface
->name
);
1619 return ISIS_WARNING
;
1623 if (pdu_type
!= FS_LINK_STATE
/* FS PDU doesn't contain max area addr field */
1624 && max_area_addrs
!= 0
1625 && max_area_addrs
!= isis
->max_area_addrs
) {
1628 "maximumAreaAddressesMismatch: maximumAreaAdresses in a received PDU %" PRIu8
1629 " while the parameter for this IS is %u",
1630 max_area_addrs
, isis
->max_area_addrs
);
1632 /* send northbound notification */
1633 isis_notif_max_area_addr_mismatch(circuit
, max_area_addrs
,
1635 #endif /* ifndef FABRICD */
1643 if (fabricd
&& pdu_type
!= P2P_HELLO
)
1645 retval
= process_hello(pdu_type
, circuit
, ssnpa
);
1651 && pdu_type
!= L2_LINK_STATE
1652 && pdu_type
!= FS_LINK_STATE
)
1654 retval
= process_lsp(pdu_type
, circuit
, ssnpa
, max_area_addrs
);
1656 case L1_COMPLETE_SEQ_NUM
:
1657 case L2_COMPLETE_SEQ_NUM
:
1658 case L1_PARTIAL_SEQ_NUM
:
1659 case L2_PARTIAL_SEQ_NUM
:
1660 retval
= process_snp(pdu_type
, circuit
, ssnpa
);
1669 int isis_receive(struct thread
*thread
)
1671 struct isis_circuit
*circuit
;
1672 uint8_t ssnpa
[ETH_ALEN
];
1678 circuit
= THREAD_ARG(thread
);
1681 circuit
->t_read
= NULL
;
1683 isis_circuit_stream(circuit
, &circuit
->rcv_stream
);
1685 retval
= circuit
->rx(circuit
, ssnpa
);
1687 #if ISIS_METHOD != ISIS_METHOD_BPF
1688 if (retval
== ISIS_OK
)
1689 retval
= isis_handle_pdu(circuit
, ssnpa
);
1690 #endif //ISIS_METHOD != ISIS_METHOD_BPF
1693 * prepare for next packet.
1695 if (!circuit
->is_passive
)
1696 isis_circuit_prepare(circuit
);
1704 void fill_fixed_hdr(uint8_t pdu_type
, struct stream
*stream
)
1708 if (pdu_size(pdu_type
, &length
))
1709 assert(!"Unknown PDU Type");
1711 stream_putc(stream
, ISO10589_ISIS
); /* IDRP */
1712 stream_putc(stream
, length
); /* Length of fixed header */
1713 stream_putc(stream
, 1); /* Version/Protocol ID Extension 1 */
1714 stream_putc(stream
, 0); /* ID Length, 0 => 6 */
1715 stream_putc(stream
, pdu_type
);
1716 stream_putc(stream
, 1); /* Subversion */
1717 stream_putc(stream
, 0); /* Reserved */
1718 stream_putc(stream
, 0); /* Max Area Addresses 0 => 3 */
1721 static uint8_t hello_pdu_type(struct isis_circuit
*circuit
, int level
)
1723 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
)
1724 return (level
== IS_LEVEL_1
) ? L1_LAN_HELLO
: L2_LAN_HELLO
;
1729 static void put_hello_hdr(struct isis_circuit
*circuit
, int level
,
1730 size_t *len_pointer
)
1732 uint8_t pdu_type
= hello_pdu_type(circuit
, level
);
1734 isis_circuit_stream(circuit
, &circuit
->snd_stream
);
1735 fill_fixed_hdr(pdu_type
, circuit
->snd_stream
);
1737 stream_putc(circuit
->snd_stream
, circuit
->is_type
);
1738 stream_put(circuit
->snd_stream
, circuit
->area
->isis
->sysid
,
1741 uint32_t holdtime
= circuit
->hello_multiplier
[level
- 1]
1742 * circuit
->hello_interval
[level
- 1];
1744 if (holdtime
> 0xffff)
1747 stream_putw(circuit
->snd_stream
, holdtime
);
1748 *len_pointer
= stream_get_endp(circuit
->snd_stream
);
1749 stream_putw(circuit
->snd_stream
, 0); /* length is filled in later */
1751 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
) {
1752 uint8_t *desig_is
= (level
== IS_LEVEL_1
)
1753 ? circuit
->u
.bc
.l1_desig_is
1754 : circuit
->u
.bc
.l2_desig_is
;
1755 stream_putc(circuit
->snd_stream
, circuit
->priority
[level
- 1]);
1756 stream_put(circuit
->snd_stream
, desig_is
, ISIS_SYS_ID_LEN
+ 1);
1758 stream_putc(circuit
->snd_stream
, circuit
->circuit_id
);
1762 int send_hello(struct isis_circuit
*circuit
, int level
)
1767 if (circuit
->is_passive
)
1770 if (circuit
->interface
->mtu
== 0) {
1771 zlog_warn("circuit has zero MTU");
1772 return ISIS_WARNING
;
1775 put_hello_hdr(circuit
, level
, &len_pointer
);
1777 struct isis_tlvs
*tlvs
= isis_alloc_tlvs();
1779 isis_tlvs_add_auth(tlvs
, &circuit
->passwd
);
1781 if (!listcount(circuit
->area
->area_addrs
)) {
1782 isis_free_tlvs(tlvs
);
1783 return ISIS_WARNING
;
1786 isis_tlvs_add_area_addresses(tlvs
, circuit
->area
->area_addrs
);
1788 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
) {
1789 isis_tlvs_add_lan_neighbors(
1790 tlvs
, circuit
->u
.bc
.lan_neighs
[level
- 1]);
1791 } else if (circuit
->circ_type
== CIRCUIT_T_P2P
1792 && !circuit
->disable_threeway_adj
) {
1793 uint32_t ext_circuit_id
= circuit
->idx
;
1794 if (circuit
->u
.p2p
.neighbor
) {
1795 uint8_t threeway_state
;
1797 if (fabricd_initial_sync_is_in_progress(circuit
->area
)
1798 && fabricd_initial_sync_circuit(circuit
->area
) != circuit
)
1799 threeway_state
= ISIS_THREEWAY_DOWN
;
1801 threeway_state
= circuit
->u
.p2p
.neighbor
->threeway_state
;
1802 isis_tlvs_add_threeway_adj(tlvs
,
1805 circuit
->u
.p2p
.neighbor
->sysid
,
1806 circuit
->u
.p2p
.neighbor
->ext_circuit_id
);
1808 isis_tlvs_add_threeway_adj(tlvs
,
1815 isis_tlvs_set_protocols_supported(tlvs
, &circuit
->nlpids
);
1820 * TLV gets included if no topology is enabled on the interface,
1821 * if one topology other than #0 is enabled, or if multiple topologies
1824 struct isis_circuit_mt_setting
**mt_settings
;
1825 unsigned int mt_count
;
1827 mt_settings
= circuit_mt_settings(circuit
, &mt_count
);
1828 if (mt_count
== 0 && area_is_mt(circuit
->area
)) {
1829 tlvs
->mt_router_info_empty
= true;
1830 } else if ((mt_count
== 1
1831 && mt_settings
[0]->mtid
!= ISIS_MT_IPV4_UNICAST
)
1832 || (mt_count
> 1)) {
1833 for (unsigned int i
= 0; i
< mt_count
; i
++)
1834 isis_tlvs_add_mt_router_info(tlvs
, mt_settings
[i
]->mtid
,
1838 if (circuit
->ip_router
) {
1839 struct list
*circuit_ip_addrs
= fabricd_ip_addrs(circuit
);
1841 if (circuit_ip_addrs
)
1842 isis_tlvs_add_ipv4_addresses(tlvs
, circuit_ip_addrs
);
1845 if (circuit
->ipv6_router
&& circuit
->ipv6_link
)
1846 isis_tlvs_add_ipv6_addresses(tlvs
, circuit
->ipv6_link
);
1848 if (isis_pack_tlvs(tlvs
, circuit
->snd_stream
, len_pointer
,
1849 circuit
->pad_hellos
, false)) {
1850 isis_free_tlvs(tlvs
);
1851 return ISIS_WARNING
; /* XXX: Maybe Log TLV structure? */
1854 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
1855 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
) {
1857 "ISIS-Adj (%s): Sending L%d LAN IIH on %s, length %zd",
1858 circuit
->area
->area_tag
, level
,
1859 circuit
->interface
->name
,
1860 stream_get_endp(circuit
->snd_stream
));
1863 "ISIS-Adj (%s): Sending P2P IIH on %s, length %zd",
1864 circuit
->area
->area_tag
,
1865 circuit
->interface
->name
,
1866 stream_get_endp(circuit
->snd_stream
));
1868 if (isis
->debugs
& DEBUG_PACKET_DUMP
)
1869 zlog_dump_data(STREAM_DATA(circuit
->snd_stream
),
1870 stream_get_endp(circuit
->snd_stream
));
1873 isis_free_tlvs(tlvs
);
1875 pdu_counter_count(circuit
->area
->pdu_tx_counters
,
1876 hello_pdu_type(circuit
, level
));
1877 retval
= circuit
->tx(circuit
, level
);
1878 if (retval
!= ISIS_OK
)
1879 flog_err(EC_ISIS_PACKET
,
1880 "ISIS-Adj (%s): Send L%d IIH on %s failed",
1881 circuit
->area
->area_tag
, level
,
1882 circuit
->interface
->name
);
1887 static int send_hello_cb(struct thread
*thread
)
1889 struct isis_circuit_arg
*arg
= THREAD_ARG(thread
);
1892 struct isis_circuit
*circuit
= arg
->circuit
;
1893 int level
= arg
->level
;
1897 if (circuit
->circ_type
== CIRCUIT_T_P2P
) {
1898 circuit
->u
.p2p
.t_send_p2p_hello
= NULL
;
1899 send_hello(circuit
, 1);
1900 send_hello_sched(circuit
, ISIS_LEVEL1
,
1901 1000 * circuit
->hello_interval
[1]);
1905 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
) {
1906 zlog_warn("ISIS-Hello (%s): Trying to send hello on unknown circuit type %d",
1907 circuit
->area
->area_tag
, circuit
->circ_type
);
1908 return ISIS_WARNING
;
1911 circuit
->u
.bc
.t_send_lan_hello
[level
- 1] = NULL
;
1912 if (!(circuit
->is_type
& level
)) {
1913 zlog_warn("ISIS-Hello (%s): Trying to send L%d IIH in L%d-only circuit",
1914 circuit
->area
->area_tag
, level
, 3 - level
);
1915 return ISIS_WARNING
;
1918 if (circuit
->u
.bc
.run_dr_elect
[level
- 1])
1919 isis_dr_elect(circuit
, level
);
1921 int rv
= send_hello(circuit
, level
);
1923 /* set next timer thread */
1924 send_hello_sched(circuit
, level
, 1000 * circuit
->hello_interval
[level
- 1]);
1928 static void _send_hello_sched(struct isis_circuit
*circuit
,
1929 struct thread
**threadp
,
1930 int level
, long delay
)
1933 if (thread_timer_remain_msec(*threadp
) < (unsigned long)delay
)
1936 thread_cancel(*threadp
);
1939 thread_add_timer_msec(master
, send_hello_cb
,
1940 &circuit
->level_arg
[level
- 1],
1941 isis_jitter(delay
, IIH_JITTER
),
1945 void send_hello_sched(struct isis_circuit
*circuit
, int level
, long delay
)
1947 if (circuit
->circ_type
== CIRCUIT_T_P2P
) {
1948 _send_hello_sched(circuit
, &circuit
->u
.p2p
.t_send_p2p_hello
,
1949 ISIS_LEVEL1
, delay
);
1953 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
) {
1954 zlog_warn("%s: encountered unknown circuit type %d on %s",
1955 __func__
, circuit
->circ_type
,
1956 circuit
->interface
->name
);
1960 for (int loop_level
= ISIS_LEVEL1
; loop_level
<= ISIS_LEVEL2
; loop_level
++) {
1961 if (!(loop_level
& level
))
1966 &circuit
->u
.bc
.t_send_lan_hello
[loop_level
- 1],
1975 * Count the maximum number of lsps that can be accomodated by a given size.
1977 #define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN)
1978 static uint16_t get_max_lsp_count(uint16_t size
)
1982 uint16_t remaining_size
;
1984 /* First count the full size TLVs */
1985 tlv_count
= size
/ MAX_LSP_ENTRIES_TLV_SIZE
;
1986 lsp_count
= tlv_count
* (MAX_LSP_ENTRIES_TLV_SIZE
/ LSP_ENTRIES_LEN
);
1988 /* The last TLV, if any */
1989 remaining_size
= size
% MAX_LSP_ENTRIES_TLV_SIZE
;
1990 if (remaining_size
- 2 >= LSP_ENTRIES_LEN
)
1991 lsp_count
+= (remaining_size
- 2) / LSP_ENTRIES_LEN
;
1996 int send_csnp(struct isis_circuit
*circuit
, int level
)
1998 if (circuit
->area
->lspdb
[level
- 1] == NULL
1999 || dict_count(circuit
->area
->lspdb
[level
- 1]) == 0)
2002 uint8_t pdu_type
= (level
== ISIS_LEVEL1
) ? L1_COMPLETE_SEQ_NUM
2003 : L2_COMPLETE_SEQ_NUM
;
2005 isis_circuit_stream(circuit
, &circuit
->snd_stream
);
2006 fill_fixed_hdr(pdu_type
, circuit
->snd_stream
);
2008 size_t len_pointer
= stream_get_endp(circuit
->snd_stream
);
2009 stream_putw(circuit
->snd_stream
, 0);
2010 stream_put(circuit
->snd_stream
, isis
->sysid
, ISIS_SYS_ID_LEN
);
2011 /* with zero circuit id - ref 9.10, 9.11 */
2012 stream_putc(circuit
->snd_stream
, 0);
2014 size_t start_pointer
= stream_get_endp(circuit
->snd_stream
);
2015 stream_put(circuit
->snd_stream
, 0, ISIS_SYS_ID_LEN
+ 2);
2016 size_t end_pointer
= stream_get_endp(circuit
->snd_stream
);
2017 stream_put(circuit
->snd_stream
, 0, ISIS_SYS_ID_LEN
+ 2);
2019 struct isis_passwd
*passwd
= (level
== ISIS_LEVEL1
)
2020 ? &circuit
->area
->area_passwd
2021 : &circuit
->area
->domain_passwd
;
2023 struct isis_tlvs
*tlvs
= isis_alloc_tlvs();
2025 if (CHECK_FLAG(passwd
->snp_auth
, SNP_AUTH_SEND
))
2026 isis_tlvs_add_auth(tlvs
, passwd
);
2028 size_t tlv_start
= stream_get_endp(circuit
->snd_stream
);
2029 if (isis_pack_tlvs(tlvs
, circuit
->snd_stream
, len_pointer
, false,
2031 isis_free_tlvs(tlvs
);
2032 return ISIS_WARNING
;
2034 isis_free_tlvs(tlvs
);
2037 get_max_lsp_count(STREAM_WRITEABLE(circuit
->snd_stream
));
2039 uint8_t start
[ISIS_SYS_ID_LEN
+ 2];
2040 memset(start
, 0x00, ISIS_SYS_ID_LEN
+ 2);
2041 uint8_t stop
[ISIS_SYS_ID_LEN
+ 2];
2042 memset(stop
, 0xff, ISIS_SYS_ID_LEN
+ 2);
2046 tlvs
= isis_alloc_tlvs();
2047 if (CHECK_FLAG(passwd
->snp_auth
, SNP_AUTH_SEND
))
2048 isis_tlvs_add_auth(tlvs
, passwd
);
2050 struct isis_lsp
*last_lsp
;
2051 isis_tlvs_add_csnp_entries(tlvs
, start
, stop
, num_lsps
,
2052 circuit
->area
->lspdb
[level
- 1],
2055 * Update the stop lsp_id before encoding this CSNP.
2057 if (tlvs
->lsp_entries
.count
< num_lsps
) {
2058 memset(stop
, 0xff, ISIS_SYS_ID_LEN
+ 2);
2060 memcpy(stop
, last_lsp
->hdr
.lsp_id
, sizeof(stop
));
2063 memcpy(STREAM_DATA(circuit
->snd_stream
) + start_pointer
, start
,
2064 ISIS_SYS_ID_LEN
+ 2);
2065 memcpy(STREAM_DATA(circuit
->snd_stream
) + end_pointer
, stop
,
2066 ISIS_SYS_ID_LEN
+ 2);
2067 stream_set_endp(circuit
->snd_stream
, tlv_start
);
2068 if (isis_pack_tlvs(tlvs
, circuit
->snd_stream
, len_pointer
,
2070 isis_free_tlvs(tlvs
);
2071 return ISIS_WARNING
;
2074 if (isis
->debugs
& DEBUG_SNP_PACKETS
) {
2076 "ISIS-Snp (%s): Sending L%d CSNP on %s, length %zd",
2077 circuit
->area
->area_tag
, level
,
2078 circuit
->interface
->name
,
2079 stream_get_endp(circuit
->snd_stream
));
2080 log_multiline(LOG_DEBUG
, " ", "%s",
2081 isis_format_tlvs(tlvs
));
2082 if (isis
->debugs
& DEBUG_PACKET_DUMP
)
2084 STREAM_DATA(circuit
->snd_stream
),
2085 stream_get_endp(circuit
->snd_stream
));
2088 pdu_counter_count(circuit
->area
->pdu_tx_counters
, pdu_type
);
2089 int retval
= circuit
->tx(circuit
, level
);
2090 if (retval
!= ISIS_OK
) {
2091 flog_err(EC_ISIS_PACKET
,
2092 "ISIS-Snp (%s): Send L%d CSNP on %s failed",
2093 circuit
->area
->area_tag
, level
,
2094 circuit
->interface
->name
);
2095 isis_free_tlvs(tlvs
);
2100 * Start lsp_id of the next CSNP should be one plus the
2101 * stop lsp_id in this current CSNP.
2103 memcpy(start
, stop
, ISIS_SYS_ID_LEN
+ 2);
2105 for (int i
= ISIS_SYS_ID_LEN
+ 1; i
>= 0; --i
) {
2106 if (start
[i
] < (uint8_t)0xff) {
2112 memset(stop
, 0xff, ISIS_SYS_ID_LEN
+ 2);
2113 isis_free_tlvs(tlvs
);
2119 int send_l1_csnp(struct thread
*thread
)
2121 struct isis_circuit
*circuit
;
2122 int retval
= ISIS_OK
;
2124 circuit
= THREAD_ARG(thread
);
2127 circuit
->t_send_csnp
[0] = NULL
;
2129 if ((circuit
->circ_type
== CIRCUIT_T_BROADCAST
2130 && circuit
->u
.bc
.is_dr
[0])
2131 || circuit
->circ_type
== CIRCUIT_T_P2P
) {
2132 send_csnp(circuit
, 1);
2134 /* set next timer thread */
2135 thread_add_timer(master
, send_l1_csnp
, circuit
,
2136 isis_jitter(circuit
->csnp_interval
[0], CSNP_JITTER
),
2137 &circuit
->t_send_csnp
[0]);
2142 int send_l2_csnp(struct thread
*thread
)
2144 struct isis_circuit
*circuit
;
2145 int retval
= ISIS_OK
;
2147 circuit
= THREAD_ARG(thread
);
2150 circuit
->t_send_csnp
[1] = NULL
;
2152 if ((circuit
->circ_type
== CIRCUIT_T_BROADCAST
2153 && circuit
->u
.bc
.is_dr
[1])
2154 || circuit
->circ_type
== CIRCUIT_T_P2P
) {
2155 send_csnp(circuit
, 2);
2157 /* set next timer thread */
2158 thread_add_timer(master
, send_l2_csnp
, circuit
,
2159 isis_jitter(circuit
->csnp_interval
[1], CSNP_JITTER
),
2160 &circuit
->t_send_csnp
[1]);
2166 * 7.3.15.4 action on expiration of partial SNP interval
2169 static int send_psnp(int level
, struct isis_circuit
*circuit
)
2171 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
2172 && circuit
->u
.bc
.is_dr
[level
- 1])
2175 if (circuit
->area
->lspdb
[level
- 1] == NULL
2176 || dict_count(circuit
->area
->lspdb
[level
- 1]) == 0)
2179 if (!circuit
->snd_stream
)
2182 uint8_t pdu_type
= (level
== ISIS_LEVEL1
) ? L1_PARTIAL_SEQ_NUM
2183 : L2_PARTIAL_SEQ_NUM
;
2185 isis_circuit_stream(circuit
, &circuit
->snd_stream
);
2186 fill_fixed_hdr(pdu_type
, circuit
->snd_stream
);
2188 size_t len_pointer
= stream_get_endp(circuit
->snd_stream
);
2189 stream_putw(circuit
->snd_stream
, 0); /* length is filled in later */
2190 stream_put(circuit
->snd_stream
, isis
->sysid
, ISIS_SYS_ID_LEN
);
2191 stream_putc(circuit
->snd_stream
, circuit
->idx
);
2193 struct isis_passwd
*passwd
= (level
== ISIS_LEVEL1
)
2194 ? &circuit
->area
->area_passwd
2195 : &circuit
->area
->domain_passwd
;
2197 struct isis_tlvs
*tlvs
= isis_alloc_tlvs();
2199 if (CHECK_FLAG(passwd
->snp_auth
, SNP_AUTH_SEND
))
2200 isis_tlvs_add_auth(tlvs
, passwd
);
2202 size_t tlv_start
= stream_get_endp(circuit
->snd_stream
);
2203 if (isis_pack_tlvs(tlvs
, circuit
->snd_stream
, len_pointer
, false,
2205 isis_free_tlvs(tlvs
);
2206 return ISIS_WARNING
;
2208 isis_free_tlvs(tlvs
);
2211 get_max_lsp_count(STREAM_WRITEABLE(circuit
->snd_stream
));
2214 tlvs
= isis_alloc_tlvs();
2215 if (CHECK_FLAG(passwd
->snp_auth
, SNP_AUTH_SEND
))
2216 isis_tlvs_add_auth(tlvs
, passwd
);
2218 for (dnode_t
*dnode
=
2219 dict_first(circuit
->area
->lspdb
[level
- 1]);
2220 dnode
; dnode
= dict_next(circuit
->area
->lspdb
[level
- 1],
2222 struct isis_lsp
*lsp
= dnode_get(dnode
);
2224 if (ISIS_CHECK_FLAG(lsp
->SSNflags
, circuit
))
2225 isis_tlvs_add_lsp_entry(tlvs
, lsp
);
2227 if (tlvs
->lsp_entries
.count
== num_lsps
)
2231 if (!tlvs
->lsp_entries
.count
) {
2232 isis_free_tlvs(tlvs
);
2236 stream_set_endp(circuit
->snd_stream
, tlv_start
);
2237 if (isis_pack_tlvs(tlvs
, circuit
->snd_stream
, len_pointer
,
2239 isis_free_tlvs(tlvs
);
2240 return ISIS_WARNING
;
2243 if (isis
->debugs
& DEBUG_SNP_PACKETS
) {
2245 "ISIS-Snp (%s): Sending L%d PSNP on %s, length %zd",
2246 circuit
->area
->area_tag
, level
,
2247 circuit
->interface
->name
,
2248 stream_get_endp(circuit
->snd_stream
));
2249 log_multiline(LOG_DEBUG
, " ", "%s",
2250 isis_format_tlvs(tlvs
));
2251 if (isis
->debugs
& DEBUG_PACKET_DUMP
)
2253 STREAM_DATA(circuit
->snd_stream
),
2254 stream_get_endp(circuit
->snd_stream
));
2257 pdu_counter_count(circuit
->area
->pdu_tx_counters
, pdu_type
);
2258 int retval
= circuit
->tx(circuit
, level
);
2259 if (retval
!= ISIS_OK
) {
2260 flog_err(EC_ISIS_PACKET
,
2261 "ISIS-Snp (%s): Send L%d PSNP on %s failed",
2262 circuit
->area
->area_tag
, level
,
2263 circuit
->interface
->name
);
2264 isis_free_tlvs(tlvs
);
2269 * sending succeeded, we can clear SSN flags of this circuit
2270 * for the LSPs in list
2272 struct isis_lsp_entry
*entry_head
;
2273 entry_head
= (struct isis_lsp_entry
*)tlvs
->lsp_entries
.head
;
2274 for (struct isis_lsp_entry
*entry
= entry_head
; entry
;
2275 entry
= entry
->next
)
2276 ISIS_CLEAR_FLAG(entry
->lsp
->SSNflags
, circuit
);
2277 isis_free_tlvs(tlvs
);
2283 int send_l1_psnp(struct thread
*thread
)
2286 struct isis_circuit
*circuit
;
2287 int retval
= ISIS_OK
;
2289 circuit
= THREAD_ARG(thread
);
2292 circuit
->t_send_psnp
[0] = NULL
;
2294 send_psnp(1, circuit
);
2295 /* set next timer thread */
2296 thread_add_timer(master
, send_l1_psnp
, circuit
,
2297 isis_jitter(circuit
->psnp_interval
[0], PSNP_JITTER
),
2298 &circuit
->t_send_psnp
[0]);
2304 * 7.3.15.4 action on expiration of partial SNP interval
2307 int send_l2_psnp(struct thread
*thread
)
2309 struct isis_circuit
*circuit
;
2310 int retval
= ISIS_OK
;
2312 circuit
= THREAD_ARG(thread
);
2315 circuit
->t_send_psnp
[1] = NULL
;
2317 send_psnp(2, circuit
);
2319 /* set next timer thread */
2320 thread_add_timer(master
, send_l2_psnp
, circuit
,
2321 isis_jitter(circuit
->psnp_interval
[1], PSNP_JITTER
),
2322 &circuit
->t_send_psnp
[1]);
2328 * ISO 10589 - 7.3.14.3
2330 void send_lsp(struct isis_circuit
*circuit
, struct isis_lsp
*lsp
,
2331 enum isis_tx_type tx_type
)
2334 int retval
= ISIS_OK
;
2336 if (circuit
->state
!= C_STATE_UP
|| circuit
->is_passive
== 1)
2340 * Do not send if levels do not match
2342 if (!(lsp
->level
& circuit
->is_type
))
2346 * Do not send if we do not have adjacencies in state up on the circuit
2348 if (circuit
->upadjcount
[lsp
->level
- 1] == 0)
2351 /* stream_copy will assert and stop program execution if LSP is larger
2353 * the circuit's MTU. So handle and log this case here. */
2354 if (stream_get_endp(lsp
->pdu
) > stream_get_size(circuit
->snd_stream
)) {
2357 "ISIS-Upd (%s): Can't send L%d LSP %s, seq 0x%08" PRIx32
2358 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
2359 "s on %s. LSP Size is %zu while interface stream size is %zu.",
2360 circuit
->area
->area_tag
, lsp
->level
,
2361 rawlspid_print(lsp
->hdr
.lsp_id
), lsp
->hdr
.seqno
,
2362 lsp
->hdr
.checksum
, lsp
->hdr
.rem_lifetime
,
2363 circuit
->interface
->name
, stream_get_endp(lsp
->pdu
),
2364 stream_get_size(circuit
->snd_stream
));
2366 /* send a northbound notification */
2367 isis_notif_lsp_too_large(circuit
, stream_get_endp(lsp
->pdu
),
2368 rawlspid_print(lsp
->hdr
.lsp_id
));
2369 #endif /* ifndef FABRICD */
2370 if (isis
->debugs
& DEBUG_PACKET_DUMP
)
2371 zlog_dump_data(STREAM_DATA(lsp
->pdu
),
2372 stream_get_endp(lsp
->pdu
));
2373 retval
= ISIS_ERROR
;
2377 /* copy our lsp to the send buffer */
2378 stream_copy(circuit
->snd_stream
, lsp
->pdu
);
2380 if (tx_type
== TX_LSP_CIRCUIT_SCOPED
) {
2381 stream_putc_at(circuit
->snd_stream
, 4, FS_LINK_STATE
);
2382 stream_putc_at(circuit
->snd_stream
, 7,
2383 L2_CIRCUIT_FLOODING_SCOPE
);
2386 if (isis
->debugs
& DEBUG_UPDATE_PACKETS
) {
2387 zlog_debug("ISIS-Upd (%s): Sending %sL%d LSP %s, seq 0x%08" PRIx32
2388 ", cksum 0x%04" PRIx16
", lifetime %" PRIu16
2390 circuit
->area
->area_tag
,
2391 (tx_type
== TX_LSP_CIRCUIT_SCOPED
)
2392 ? "Circuit scoped " : "",
2394 rawlspid_print(lsp
->hdr
.lsp_id
), lsp
->hdr
.seqno
,
2395 lsp
->hdr
.checksum
, lsp
->hdr
.rem_lifetime
,
2396 circuit
->interface
->name
);
2397 if (isis
->debugs
& DEBUG_PACKET_DUMP
)
2398 zlog_dump_data(STREAM_DATA(circuit
->snd_stream
),
2399 stream_get_endp(circuit
->snd_stream
));
2402 uint8_t pdu_type
= (tx_type
== TX_LSP_CIRCUIT_SCOPED
) ? FS_LINK_STATE
2403 : (lsp
->level
== ISIS_LEVEL1
) ? L1_LINK_STATE
2407 pdu_counter_count(circuit
->area
->pdu_tx_counters
, pdu_type
);
2408 retval
= circuit
->tx(circuit
, lsp
->level
);
2409 if (retval
!= ISIS_OK
) {
2410 flog_err(EC_ISIS_PACKET
,
2411 "ISIS-Upd (%s): Send L%d LSP on %s failed %s",
2412 circuit
->area
->area_tag
, lsp
->level
,
2413 circuit
->interface
->name
,
2414 (retval
== ISIS_WARNING
) ? "temporarily"
2420 || (retval
== ISIS_OK
&& circuit
->circ_type
== CIRCUIT_T_BROADCAST
)
2421 || (retval
!= ISIS_OK
&& retval
!= ISIS_WARNING
)) {
2422 /* SRM flag will trigger retransmission. We will not retransmit
2424 * encountered a fatal error.
2425 * On success, they should only be cleared if it's a broadcast
2427 * On a P2P circuit, we will wait for the ack from the neighbor
2431 isis_tx_queue_del(circuit
->tx_queue
, lsp
);