2 * IS-IS Rout(e)ing protocol - isis_adjacency.c
3 * handling of IS-IS adjacencies
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
35 #include "isisd/dict.h"
36 #include "isisd/isis_constants.h"
37 #include "isisd/isis_common.h"
38 #include "isisd/isis_flags.h"
39 #include "isisd/isisd.h"
40 #include "isisd/isis_circuit.h"
41 #include "isisd/isis_adjacency.h"
42 #include "isisd/isis_misc.h"
43 #include "isisd/isis_dr.h"
44 #include "isisd/isis_dynhn.h"
45 #include "isisd/isis_pdu.h"
46 #include "isisd/isis_lsp.h"
47 #include "isisd/isis_spf.h"
48 #include "isisd/isis_events.h"
49 #include "isisd/isis_mt.h"
50 #include "isisd/isis_tlvs.h"
51 #include "isisd/fabricd.h"
53 extern struct isis
*isis
;
55 static struct isis_adjacency
*adj_alloc(const uint8_t *id
)
57 struct isis_adjacency
*adj
;
59 adj
= XCALLOC(MTYPE_ISIS_ADJACENCY
, sizeof(struct isis_adjacency
));
60 memcpy(adj
->sysid
, id
, ISIS_SYS_ID_LEN
);
65 struct isis_adjacency
*isis_new_adj(const uint8_t *id
, const uint8_t *snpa
,
66 int level
, struct isis_circuit
*circuit
)
68 struct isis_adjacency
*adj
;
71 adj
= adj_alloc(id
); /* P2P kludge */
74 memcpy(adj
->snpa
, snpa
, ETH_ALEN
);
76 memset(adj
->snpa
, ' ', ETH_ALEN
);
79 adj
->circuit
= circuit
;
82 adj
->last_flap
= time(NULL
);
83 adj
->threeway_state
= ISIS_THREEWAY_DOWN
;
84 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
) {
85 listnode_add(circuit
->u
.bc
.adjdb
[level
- 1], adj
);
86 adj
->dischanges
[level
- 1] = 0;
87 for (i
= 0; i
< DIS_RECORDS
;
88 i
++) /* clear N DIS state change records */
90 adj
->dis_record
[(i
* ISIS_LEVELS
) + level
- 1].dis
=
92 adj
->dis_record
[(i
* ISIS_LEVELS
) + level
- 1]
93 .last_dis_change
= time(NULL
);
100 struct isis_adjacency
*isis_adj_lookup(const uint8_t *sysid
, struct list
*adjdb
)
102 struct isis_adjacency
*adj
;
103 struct listnode
*node
;
105 for (ALL_LIST_ELEMENTS_RO(adjdb
, node
, adj
))
106 if (memcmp(adj
->sysid
, sysid
, ISIS_SYS_ID_LEN
) == 0)
112 struct isis_adjacency
*isis_adj_lookup_snpa(const uint8_t *ssnpa
,
115 struct listnode
*node
;
116 struct isis_adjacency
*adj
;
118 for (ALL_LIST_ELEMENTS_RO(adjdb
, node
, adj
))
119 if (memcmp(adj
->snpa
, ssnpa
, ETH_ALEN
) == 0)
125 DEFINE_HOOK(isis_adj_state_change_hook
, (struct isis_adjacency
*adj
), (adj
))
127 void isis_delete_adj(void *arg
)
129 struct isis_adjacency
*adj
= arg
;
134 THREAD_TIMER_OFF(adj
->t_expire
);
135 if (adj
->adj_state
!= ISIS_ADJ_DOWN
) {
136 adj
->adj_state
= ISIS_ADJ_DOWN
;
137 hook_call(isis_adj_state_change_hook
, adj
);
140 /* remove from SPF trees */
141 spftree_area_adj_del(adj
->circuit
->area
, adj
);
143 if (adj
->area_addresses
)
144 XFREE(MTYPE_ISIS_ADJACENCY_INFO
, adj
->area_addresses
);
145 if (adj
->ipv4_addresses
)
146 XFREE(MTYPE_ISIS_ADJACENCY_INFO
, adj
->ipv4_addresses
);
147 if (adj
->ipv6_addresses
)
148 XFREE(MTYPE_ISIS_ADJACENCY_INFO
, adj
->ipv6_addresses
);
152 XFREE(MTYPE_ISIS_ADJACENCY
, adj
);
156 static const char *adj_state2string(int state
)
160 case ISIS_ADJ_INITIALIZING
:
161 return "Initializing";
170 return NULL
; /* not reached */
173 void isis_adj_process_threeway(struct isis_adjacency
*adj
,
174 struct isis_threeway_adj
*tw_adj
,
175 enum isis_adj_usage adj_usage
)
177 enum isis_threeway_state next_tw_state
= ISIS_THREEWAY_DOWN
;
179 if (tw_adj
&& !adj
->circuit
->disable_threeway_adj
) {
180 if (tw_adj
->state
== ISIS_THREEWAY_DOWN
) {
181 next_tw_state
= ISIS_THREEWAY_INITIALIZING
;
182 } else if (tw_adj
->state
== ISIS_THREEWAY_INITIALIZING
) {
183 next_tw_state
= ISIS_THREEWAY_UP
;
184 } else if (tw_adj
->state
== ISIS_THREEWAY_UP
) {
185 if (adj
->threeway_state
== ISIS_THREEWAY_DOWN
)
186 next_tw_state
= ISIS_THREEWAY_DOWN
;
188 next_tw_state
= ISIS_THREEWAY_UP
;
191 next_tw_state
= ISIS_THREEWAY_UP
;
194 if (next_tw_state
!= adj
->threeway_state
) {
195 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
196 zlog_info("ISIS-Adj (%s): Threeway state change %s to %s",
197 adj
->circuit
->area
->area_tag
,
198 isis_threeway_state_name(adj
->threeway_state
),
199 isis_threeway_state_name(next_tw_state
));
203 if (next_tw_state
!= ISIS_THREEWAY_DOWN
)
204 fabricd_initial_sync_hello(adj
->circuit
);
206 if (next_tw_state
== ISIS_THREEWAY_DOWN
) {
207 isis_adj_state_change(adj
, ISIS_ADJ_DOWN
, "Neighbor restarted");
211 if (next_tw_state
== ISIS_THREEWAY_UP
) {
212 if (adj
->adj_state
!= ISIS_ADJ_UP
) {
213 isis_adj_state_change(adj
, ISIS_ADJ_UP
, NULL
);
214 adj
->adj_usage
= adj_usage
;
218 if (adj
->threeway_state
!= next_tw_state
) {
219 send_hello_sched(adj
->circuit
, 0, TRIGGERED_IIH_DELAY
);
222 adj
->threeway_state
= next_tw_state
;
225 void isis_adj_state_change(struct isis_adjacency
*adj
,
226 enum isis_adj_state new_state
, const char *reason
)
228 enum isis_adj_state old_state
= adj
->adj_state
;
229 struct isis_circuit
*circuit
= adj
->circuit
;
232 adj
->adj_state
= new_state
;
233 if (new_state
!= old_state
) {
234 send_hello_sched(circuit
, adj
->level
, TRIGGERED_IIH_DELAY
);
237 if (isis
->debugs
& DEBUG_ADJ_PACKETS
) {
238 zlog_debug("ISIS-Adj (%s): Adjacency state change %d->%d: %s",
239 circuit
->area
->area_tag
, old_state
, new_state
,
240 reason
? reason
: "unspecified");
243 if (circuit
->area
->log_adj_changes
) {
244 const char *adj_name
;
245 struct isis_dynhn
*dyn
;
247 dyn
= dynhn_find_by_id(adj
->sysid
);
249 adj_name
= dyn
->hostname
;
251 adj_name
= sysid_print(adj
->sysid
);
254 "%%ADJCHANGE: Adjacency to %s (%s) changed from %s to %s, %s",
255 adj_name
, adj
->circuit
->interface
->name
,
256 adj_state2string(old_state
),
257 adj_state2string(new_state
),
258 reason
? reason
: "unspecified");
262 /* send northbound notification */
263 isis_notif_adj_state_change(adj
, new_state
, reason
);
264 #endif /* ifndef FABRICD */
266 if (circuit
->circ_type
== CIRCUIT_T_BROADCAST
) {
268 for (int level
= IS_LEVEL_1
; level
<= IS_LEVEL_2
; level
++) {
269 if ((adj
->level
& level
) == 0)
271 if (new_state
== ISIS_ADJ_UP
) {
272 circuit
->upadjcount
[level
- 1]++;
273 hook_call(isis_adj_state_change_hook
, adj
);
274 /* update counter & timers for debugging
276 adj
->last_flap
= time(NULL
);
278 } else if (new_state
== ISIS_ADJ_DOWN
) {
279 listnode_delete(circuit
->u
.bc
.adjdb
[level
- 1],
282 circuit
->upadjcount
[level
- 1]--;
283 if (circuit
->upadjcount
[level
- 1] == 0)
284 isis_tx_queue_clean(circuit
->tx_queue
);
286 hook_call(isis_adj_state_change_hook
, adj
);
290 if (circuit
->u
.bc
.lan_neighs
[level
- 1]) {
291 list_delete_all_node(
292 circuit
->u
.bc
.lan_neighs
[level
- 1]);
293 isis_adj_build_neigh_list(
294 circuit
->u
.bc
.adjdb
[level
- 1],
295 circuit
->u
.bc
.lan_neighs
[level
- 1]);
298 /* On adjacency state change send new pseudo LSP if we
300 if (circuit
->u
.bc
.is_dr
[level
- 1])
301 lsp_regenerate_schedule_pseudo(circuit
, level
);
305 isis_delete_adj(adj
);
307 } else if (circuit
->circ_type
== CIRCUIT_T_P2P
) {
309 for (int level
= IS_LEVEL_1
; level
<= IS_LEVEL_2
; level
++) {
310 if ((adj
->level
& level
) == 0)
312 if (new_state
== ISIS_ADJ_UP
) {
313 circuit
->upadjcount
[level
- 1]++;
314 hook_call(isis_adj_state_change_hook
, adj
);
316 /* update counter & timers for debugging
318 adj
->last_flap
= time(NULL
);
321 if (level
== IS_LEVEL_1
) {
322 thread_add_timer(master
, send_l1_csnp
,
324 &circuit
->t_send_csnp
[0]);
326 thread_add_timer(master
, send_l2_csnp
,
328 &circuit
->t_send_csnp
[1]);
330 } else if (new_state
== ISIS_ADJ_DOWN
) {
331 if (adj
->circuit
->u
.p2p
.neighbor
== adj
)
332 adj
->circuit
->u
.p2p
.neighbor
= NULL
;
333 circuit
->upadjcount
[level
- 1]--;
334 if (circuit
->upadjcount
[level
- 1] == 0)
335 isis_tx_queue_clean(circuit
->tx_queue
);
337 hook_call(isis_adj_state_change_hook
, adj
);
343 isis_delete_adj(adj
);
348 void isis_adj_print(struct isis_adjacency
*adj
)
350 struct isis_dynhn
*dyn
;
354 dyn
= dynhn_find_by_id(adj
->sysid
);
356 zlog_debug("%s", dyn
->hostname
);
358 zlog_debug("SystemId %20s SNPA %s, level %d\nHolding Time %d",
359 sysid_print(adj
->sysid
), snpa_print(adj
->snpa
), adj
->level
,
361 if (adj
->ipv4_address_count
) {
362 zlog_debug("IPv4 Address(es):");
363 for (unsigned int i
= 0; i
< adj
->ipv4_address_count
; i
++)
364 zlog_debug("%s", inet_ntoa(adj
->ipv4_addresses
[i
]));
367 if (adj
->ipv6_address_count
) {
368 zlog_debug("IPv6 Address(es):");
369 for (unsigned int i
= 0; i
< adj
->ipv6_address_count
; i
++) {
370 char buf
[INET6_ADDRSTRLEN
];
371 inet_ntop(AF_INET6
, &adj
->ipv6_addresses
[i
], buf
,
373 zlog_debug("%s", buf
);
376 zlog_debug("Speaks: %s", nlpid2string(&adj
->nlpids
));
381 int isis_adj_expire(struct thread
*thread
)
383 struct isis_adjacency
*adj
;
388 adj
= THREAD_ARG(thread
);
390 adj
->t_expire
= NULL
;
392 /* trigger the adj expire event */
393 isis_adj_state_change(adj
, ISIS_ADJ_DOWN
, "holding time expired");
399 * show isis neighbor [detail]
401 void isis_adj_print_vty(struct isis_adjacency
*adj
, struct vty
*vty
,
405 struct isis_dynhn
*dyn
;
408 dyn
= dynhn_find_by_id(adj
->sysid
);
410 vty_out(vty
, " %-20s", dyn
->hostname
);
412 vty_out(vty
, " %-20s", sysid_print(adj
->sysid
));
414 if (detail
== ISIS_UI_LEVEL_BRIEF
) {
416 vty_out(vty
, "%-12s", adj
->circuit
->interface
->name
);
418 vty_out(vty
, "NULL circuit!");
419 vty_out(vty
, "%-3u", adj
->level
); /* level */
420 vty_out(vty
, "%-13s", adj_state2string(adj
->adj_state
));
423 vty_out(vty
, "%-9llu",
424 (unsigned long long)adj
->last_upd
425 + adj
->hold_time
- now
);
428 vty_out(vty
, "%-10s", snpa_print(adj
->snpa
));
432 if (detail
== ISIS_UI_LEVEL_DETAIL
) {
436 vty_out(vty
, " Interface: %s",
437 adj
->circuit
->interface
->name
);
439 vty_out(vty
, " Interface: NULL circuit");
440 vty_out(vty
, ", Level: %u", adj
->level
); /* level */
441 vty_out(vty
, ", State: %s", adj_state2string(adj
->adj_state
));
444 vty_out(vty
, ", Expires in %s",
445 time2string(adj
->last_upd
+ adj
->hold_time
448 vty_out(vty
, ", Expires in %s",
449 time2string(adj
->hold_time
));
451 vty_out(vty
, " Adjacency flaps: %u", adj
->flaps
);
452 vty_out(vty
, ", Last: %s ago",
453 time2string(now
- adj
->last_flap
));
455 vty_out(vty
, " Circuit type: %s",
456 circuit_t2string(adj
->circuit_t
));
457 vty_out(vty
, ", Speaks: %s", nlpid2string(&adj
->nlpids
));
459 if (adj
->mt_count
!= 1
460 || adj
->mt_set
[0] != ISIS_MT_IPV4_UNICAST
) {
461 vty_out(vty
, " Topologies:\n");
462 for (unsigned int i
= 0; i
< adj
->mt_count
; i
++)
463 vty_out(vty
, " %s\n",
464 isis_mtid2str(adj
->mt_set
[i
]));
466 vty_out(vty
, " SNPA: %s", snpa_print(adj
->snpa
));
468 && (adj
->circuit
->circ_type
== CIRCUIT_T_BROADCAST
)) {
469 dyn
= dynhn_find_by_id(adj
->lanid
);
471 vty_out(vty
, ", LAN id: %s.%02x", dyn
->hostname
,
472 adj
->lanid
[ISIS_SYS_ID_LEN
]);
474 vty_out(vty
, ", LAN id: %s.%02x",
475 sysid_print(adj
->lanid
),
476 adj
->lanid
[ISIS_SYS_ID_LEN
]);
479 vty_out(vty
, " LAN Priority: %u",
480 adj
->prio
[adj
->level
- 1]);
482 vty_out(vty
, ", %s, DIS flaps: %u, Last: %s ago",
484 adj
->dis_record
[ISIS_LEVELS
+ level
- 1]
486 adj
->dischanges
[level
- 1],
487 time2string(now
- (adj
->dis_record
[ISIS_LEVELS
493 if (adj
->area_address_count
) {
494 vty_out(vty
, " Area Address(es):\n");
495 for (unsigned int i
= 0; i
< adj
->area_address_count
;
497 vty_out(vty
, " %s\n",
498 isonet_print(adj
->area_addresses
[i
]
500 adj
->area_addresses
[i
]
504 if (adj
->ipv4_address_count
) {
505 vty_out(vty
, " IPv4 Address(es):\n");
506 for (unsigned int i
= 0; i
< adj
->ipv4_address_count
;
508 vty_out(vty
, " %s\n",
509 inet_ntoa(adj
->ipv4_addresses
[i
]));
511 if (adj
->ipv6_address_count
) {
512 vty_out(vty
, " IPv6 Address(es):\n");
513 for (unsigned int i
= 0; i
< adj
->ipv6_address_count
;
515 char buf
[INET6_ADDRSTRLEN
];
516 inet_ntop(AF_INET6
, &adj
->ipv6_addresses
[i
],
518 vty_out(vty
, " %s\n", buf
);
526 void isis_adj_build_neigh_list(struct list
*adjdb
, struct list
*list
)
528 struct isis_adjacency
*adj
;
529 struct listnode
*node
;
532 zlog_warn("isis_adj_build_neigh_list(): NULL list");
536 for (ALL_LIST_ELEMENTS_RO(adjdb
, node
, adj
)) {
538 zlog_warn("isis_adj_build_neigh_list(): NULL adj");
542 if ((adj
->adj_state
== ISIS_ADJ_UP
543 || adj
->adj_state
== ISIS_ADJ_INITIALIZING
))
544 listnode_add(list
, adj
->snpa
);
549 void isis_adj_build_up_list(struct list
*adjdb
, struct list
*list
)
551 struct isis_adjacency
*adj
;
552 struct listnode
*node
;
555 zlog_warn("isis_adj_build_up_list(): adjacency DB is empty");
560 zlog_warn("isis_adj_build_up_list(): NULL list");
564 for (ALL_LIST_ELEMENTS_RO(adjdb
, node
, adj
)) {
566 zlog_warn("isis_adj_build_up_list(): NULL adj");
570 if (adj
->adj_state
== ISIS_ADJ_UP
)
571 listnode_add(list
, adj
);
577 int isis_adj_usage2levels(enum isis_adj_usage usage
)
580 case ISIS_ADJ_LEVEL1
:
582 case ISIS_ADJ_LEVEL2
:
584 case ISIS_ADJ_LEVEL1AND2
:
585 return IS_LEVEL_1
| IS_LEVEL_2
;