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2d59836a | 1 | /* |
2 | * OSPF version 2 Neighbor State Machine | |
3 | * From RFC2328 [OSPF Version 2] | |
4 | * Copyright (C) 1999, 2000 Toshiaki Takada | |
5 | * | |
6 | * This file is part of GNU Zebra. | |
7 | * | |
8 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2, or (at your option) any | |
11 | * later version. | |
12 | * | |
13 | * GNU Zebra is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
21 | * 02111-1307, USA. | |
22 | */ | |
23 | ||
24 | #include <zebra.h> | |
25 | ||
26 | #include "thread.h" | |
27 | #include "memory.h" | |
28 | #include "hash.h" | |
29 | #include "linklist.h" | |
30 | #include "prefix.h" | |
31 | #include "if.h" | |
32 | #include "table.h" | |
33 | #include "stream.h" | |
34 | #include "table.h" | |
35 | #include "log.h" | |
bf2bfafd | 36 | #include "command.h" |
2d59836a | 37 | |
38 | #include "ospfd/ospfd.h" | |
39 | #include "ospfd/ospf_interface.h" | |
40 | #include "ospfd/ospf_ism.h" | |
41 | #include "ospfd/ospf_asbr.h" | |
42 | #include "ospfd/ospf_lsa.h" | |
43 | #include "ospfd/ospf_lsdb.h" | |
44 | #include "ospfd/ospf_neighbor.h" | |
45 | #include "ospfd/ospf_nsm.h" | |
46 | #include "ospfd/ospf_network.h" | |
47 | #include "ospfd/ospf_packet.h" | |
48 | #include "ospfd/ospf_dump.h" | |
49 | #include "ospfd/ospf_flood.h" | |
50 | #include "ospfd/ospf_abr.h" | |
5e4914c3 | 51 | #include "ospfd/ospf_snmp.h" |
7f342629 | 52 | #include "ospfd/ospf_bfd.h" |
2d59836a | 53 | |
d1b1cd8f | 54 | static void nsm_clear_adj (struct ospf_neighbor *); |
6b0655a2 | 55 | |
2d59836a | 56 | /* OSPF NSM Timer functions. */ |
4dadc291 | 57 | static int |
2d59836a | 58 | ospf_inactivity_timer (struct thread *thread) |
59 | { | |
60 | struct ospf_neighbor *nbr; | |
61 | ||
62 | nbr = THREAD_ARG (thread); | |
63 | nbr->t_inactivity = NULL; | |
64 | ||
65 | if (IS_DEBUG_OSPF (nsm, NSM_TIMERS)) | |
4525281a DL |
66 | zlog_debug("NSM[%s:%s]: Timer (Inactivity timer expire)", |
67 | IF_NAME(nbr->oi), inet_ntoa(nbr->router_id)); | |
2d59836a | 68 | |
69 | OSPF_NSM_EVENT_SCHEDULE (nbr, NSM_InactivityTimer); | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
4dadc291 | 74 | static int |
2d59836a | 75 | ospf_db_desc_timer (struct thread *thread) |
76 | { | |
2d59836a | 77 | struct ospf_neighbor *nbr; |
78 | ||
79 | nbr = THREAD_ARG (thread); | |
80 | nbr->t_db_desc = NULL; | |
81 | ||
2d59836a | 82 | if (IS_DEBUG_OSPF (nsm, NSM_TIMERS)) |
4525281a DL |
83 | zlog_debug("NSM[%s:%s]: Timer (DD Retransmit timer expire)", |
84 | IF_NAME(nbr->oi), inet_ntoa(nbr->src)); | |
2d59836a | 85 | |
86 | /* resent last send DD packet. */ | |
87 | assert (nbr->last_send); | |
88 | ospf_db_desc_resend (nbr); | |
89 | ||
90 | /* DD Retransmit timer set. */ | |
91 | OSPF_NSM_TIMER_ON (nbr->t_db_desc, ospf_db_desc_timer, nbr->v_db_desc); | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
1f2c2743 PJ |
96 | /* Hook function called after ospf NSM event is occured. |
97 | * | |
98 | * Set/clear any timers whose condition is implicit to the neighbour | |
99 | * state. There may be other timers which are set/unset according to other | |
100 | * state. | |
101 | * | |
102 | * We rely on this function to properly clear timers in lower states, | |
103 | * particularly before deleting a neighbour. | |
104 | */ | |
4dadc291 | 105 | static void |
2d59836a | 106 | nsm_timer_set (struct ospf_neighbor *nbr) |
107 | { | |
108 | switch (nbr->state) | |
109 | { | |
1f2c2743 | 110 | case NSM_Deleted: |
2d59836a | 111 | case NSM_Down: |
e55dd53b | 112 | OSPF_NSM_TIMER_OFF (nbr->t_inactivity); |
1f2c2743 | 113 | OSPF_NSM_TIMER_OFF (nbr->t_hello_reply); |
2d59836a | 114 | case NSM_Attempt: |
2d59836a | 115 | case NSM_Init: |
2d59836a | 116 | case NSM_TwoWay: |
117 | OSPF_NSM_TIMER_OFF (nbr->t_db_desc); | |
118 | OSPF_NSM_TIMER_OFF (nbr->t_ls_upd); | |
e55dd53b | 119 | OSPF_NSM_TIMER_OFF (nbr->t_ls_req); |
2d59836a | 120 | break; |
121 | case NSM_ExStart: | |
122 | OSPF_NSM_TIMER_ON (nbr->t_db_desc, ospf_db_desc_timer, nbr->v_db_desc); | |
123 | OSPF_NSM_TIMER_OFF (nbr->t_ls_upd); | |
e55dd53b | 124 | OSPF_NSM_TIMER_OFF (nbr->t_ls_req); |
2d59836a | 125 | break; |
126 | case NSM_Exchange: | |
127 | OSPF_NSM_TIMER_ON (nbr->t_ls_upd, ospf_ls_upd_timer, nbr->v_ls_upd); | |
128 | if (!IS_SET_DD_MS (nbr->dd_flags)) | |
129 | OSPF_NSM_TIMER_OFF (nbr->t_db_desc); | |
130 | break; | |
131 | case NSM_Loading: | |
2d59836a | 132 | case NSM_Full: |
2d59836a | 133 | default: |
134 | OSPF_NSM_TIMER_OFF (nbr->t_db_desc); | |
135 | break; | |
136 | } | |
137 | } | |
138 | ||
d7b0fb62 PJ |
139 | /* 10.4 of RFC2328, indicate whether an adjacency is appropriate with |
140 | * the given neighbour | |
141 | */ | |
142 | static int | |
143 | nsm_should_adj (struct ospf_neighbor *nbr) | |
144 | { | |
f7a76abf | 145 | struct ospf_interface *oi = nbr->oi; |
d7b0fb62 | 146 | |
f7a76abf | 147 | /* These network types must always form adjacencies. */ |
d7b0fb62 PJ |
148 | if (oi->type == OSPF_IFTYPE_POINTOPOINT |
149 | || oi->type == OSPF_IFTYPE_POINTOMULTIPOINT | |
f7a76abf PJ |
150 | || oi->type == OSPF_IFTYPE_VIRTUALLINK |
151 | /* Router itself is the DRouter or the BDRouter. */ | |
152 | || IPV4_ADDR_SAME (&oi->address->u.prefix4, &DR (oi)) | |
153 | || IPV4_ADDR_SAME (&oi->address->u.prefix4, &BDR (oi)) | |
154 | /* Neighboring Router is the DRouter or the BDRouter. */ | |
155 | || IPV4_ADDR_SAME (&nbr->address.u.prefix4, &DR (oi)) | |
d7b0fb62 PJ |
156 | || IPV4_ADDR_SAME (&nbr->address.u.prefix4, &BDR (oi))) |
157 | return 1; | |
158 | ||
159 | return 0; | |
160 | } | |
6b0655a2 | 161 | |
2d59836a | 162 | /* OSPF NSM functions. */ |
4dadc291 | 163 | static int |
57c5c652 | 164 | nsm_packet_received (struct ospf_neighbor *nbr) |
2d59836a | 165 | { |
166 | /* Start or Restart Inactivity Timer. */ | |
167 | OSPF_NSM_TIMER_OFF (nbr->t_inactivity); | |
168 | ||
169 | OSPF_NSM_TIMER_ON (nbr->t_inactivity, ospf_inactivity_timer, | |
170 | nbr->v_inactivity); | |
171 | ||
172 | if (nbr->oi->type == OSPF_IFTYPE_NBMA && nbr->nbr_nbma) | |
173 | OSPF_POLL_TIMER_OFF (nbr->nbr_nbma->t_poll); | |
174 | ||
8b6912c2 DS |
175 | /* Send proactive ARP requests */ |
176 | if (nbr->state < NSM_Exchange) | |
177 | ospf_proactively_arp (nbr); | |
178 | ||
2d59836a | 179 | return 0; |
180 | } | |
181 | ||
4dadc291 | 182 | static int |
2d59836a | 183 | nsm_start (struct ospf_neighbor *nbr) |
184 | { | |
2d59836a | 185 | if (nbr->nbr_nbma) |
186 | OSPF_POLL_TIMER_OFF (nbr->nbr_nbma->t_poll); | |
187 | ||
188 | OSPF_NSM_TIMER_OFF (nbr->t_inactivity); | |
189 | ||
190 | OSPF_NSM_TIMER_ON (nbr->t_inactivity, ospf_inactivity_timer, | |
191 | nbr->v_inactivity); | |
192 | ||
8b6912c2 DS |
193 | /* Send proactive ARP requests */ |
194 | ospf_proactively_arp (nbr); | |
195 | ||
2d59836a | 196 | return 0; |
197 | } | |
198 | ||
4dadc291 | 199 | static int |
2d59836a | 200 | nsm_twoway_received (struct ospf_neighbor *nbr) |
201 | { | |
8b6912c2 DS |
202 | int adj = nsm_should_adj (nbr); |
203 | ||
204 | /* Send proactive ARP requests */ | |
205 | if (adj) | |
206 | ospf_proactively_arp (nbr); | |
207 | ||
208 | return (adj ? NSM_ExStart : NSM_TwoWay); | |
2d59836a | 209 | } |
210 | ||
211 | int | |
212 | ospf_db_summary_count (struct ospf_neighbor *nbr) | |
213 | { | |
214 | return ospf_lsdb_count_all (&nbr->db_sum); | |
215 | } | |
216 | ||
217 | int | |
218 | ospf_db_summary_isempty (struct ospf_neighbor *nbr) | |
219 | { | |
220 | return ospf_lsdb_isempty (&nbr->db_sum); | |
221 | } | |
222 | ||
4dadc291 | 223 | static int |
68980084 | 224 | ospf_db_summary_add (struct ospf_neighbor *nbr, struct ospf_lsa *lsa) |
2d59836a | 225 | { |
09e4efdc | 226 | switch (lsa->data->type) |
227 | { | |
228 | case OSPF_OPAQUE_LINK_LSA: | |
229 | /* Exclude type-9 LSAs that does not have the same "oi" with "nbr". */ | |
d71ea652 | 230 | if (nbr->oi && ospf_if_exists (lsa->oi) != nbr->oi) |
09e4efdc | 231 | return 0; |
232 | break; | |
233 | case OSPF_OPAQUE_AREA_LSA: | |
234 | /* | |
235 | * It is assured by the caller function "nsm_negotiation_done()" | |
236 | * that every given LSA belongs to the same area with "nbr". | |
237 | */ | |
238 | break; | |
239 | case OSPF_OPAQUE_AS_LSA: | |
240 | default: | |
241 | break; | |
242 | } | |
09e4efdc | 243 | |
2d59836a | 244 | /* Stay away from any Local Translated Type-7 LSAs */ |
245 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
246 | return 0; | |
2d59836a | 247 | |
248 | if (IS_LSA_MAXAGE (lsa)) | |
249 | ospf_ls_retransmit_add (nbr, lsa); | |
250 | else | |
251 | ospf_lsdb_add (&nbr->db_sum, lsa); | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | void | |
257 | ospf_db_summary_clear (struct ospf_neighbor *nbr) | |
258 | { | |
259 | struct ospf_lsdb *lsdb; | |
260 | int i; | |
261 | ||
262 | lsdb = &nbr->db_sum; | |
263 | for (i = OSPF_MIN_LSA; i < OSPF_MAX_LSA; i++) | |
264 | { | |
265 | struct route_table *table = lsdb->type[i].db; | |
266 | struct route_node *rn; | |
267 | ||
268 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
269 | if (rn->info) | |
270 | ospf_lsdb_delete (&nbr->db_sum, rn->info); | |
271 | } | |
272 | } | |
273 | ||
6b0655a2 | 274 | |
2d59836a | 275 | |
2d59836a | 276 | /* The area link state database consists of the router-LSAs, |
277 | network-LSAs and summary-LSAs contained in the area structure, | |
68980084 | 278 | along with the AS-external-LSAs contained in the global structure. |
279 | AS-external-LSAs are omitted from a virtual neighbor's Database | |
2d59836a | 280 | summary list. AS-external-LSAs are omitted from the Database |
281 | summary list if the area has been configured as a stub. */ | |
4dadc291 | 282 | static int |
2d59836a | 283 | nsm_negotiation_done (struct ospf_neighbor *nbr) |
284 | { | |
68980084 | 285 | struct ospf_area *area = nbr->oi->area; |
286 | struct ospf_lsa *lsa; | |
287 | struct route_node *rn; | |
288 | ||
8b6912c2 DS |
289 | /* Send proactive ARP requests */ |
290 | ospf_proactively_arp (nbr); | |
291 | ||
68980084 | 292 | LSDB_LOOP (ROUTER_LSDB (area), rn, lsa) |
293 | ospf_db_summary_add (nbr, lsa); | |
294 | LSDB_LOOP (NETWORK_LSDB (area), rn, lsa) | |
295 | ospf_db_summary_add (nbr, lsa); | |
296 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) | |
297 | ospf_db_summary_add (nbr, lsa); | |
298 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
299 | ospf_db_summary_add (nbr, lsa); | |
2d59836a | 300 | |
2d59836a | 301 | /* Process only if the neighbor is opaque capable. */ |
302 | if (CHECK_FLAG (nbr->options, OSPF_OPTION_O)) | |
303 | { | |
68980084 | 304 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) |
305 | ospf_db_summary_add (nbr, lsa); | |
306 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) | |
307 | ospf_db_summary_add (nbr, lsa); | |
2d59836a | 308 | } |
2d59836a | 309 | |
f4833e9f | 310 | if (CHECK_FLAG (nbr->options, OSPF_OPTION_NP)) |
311 | { | |
312 | LSDB_LOOP (NSSA_LSDB (area), rn, lsa) | |
313 | ospf_db_summary_add (nbr, lsa); | |
314 | } | |
315 | ||
68980084 | 316 | if (nbr->oi->type != OSPF_IFTYPE_VIRTUALLINK |
317 | && area->external_routing == OSPF_AREA_DEFAULT) | |
318 | LSDB_LOOP (EXTERNAL_LSDB (nbr->oi->ospf), rn, lsa) | |
319 | ospf_db_summary_add (nbr, lsa); | |
2d59836a | 320 | |
68980084 | 321 | if (CHECK_FLAG (nbr->options, OSPF_OPTION_O) |
322 | && (nbr->oi->type != OSPF_IFTYPE_VIRTUALLINK | |
323 | && area->external_routing == OSPF_AREA_DEFAULT)) | |
324 | LSDB_LOOP (OPAQUE_AS_LSDB (nbr->oi->ospf), rn, lsa) | |
325 | ospf_db_summary_add (nbr, lsa); | |
2d59836a | 326 | |
2d59836a | 327 | return 0; |
328 | } | |
329 | ||
4dadc291 | 330 | static int |
2d59836a | 331 | nsm_exchange_done (struct ospf_neighbor *nbr) |
332 | { | |
2d59836a | 333 | if (ospf_ls_request_isempty (nbr)) |
334 | return NSM_Full; | |
335 | ||
2d59836a | 336 | /* Send Link State Request. */ |
97dba7b7 DS |
337 | if (nbr->t_ls_req == NULL) |
338 | ospf_ls_req_send (nbr); | |
2d59836a | 339 | |
340 | return NSM_Loading; | |
341 | } | |
342 | ||
4dadc291 | 343 | static int |
2d59836a | 344 | nsm_adj_ok (struct ospf_neighbor *nbr) |
345 | { | |
d7b0fb62 PJ |
346 | int next_state = nbr->state; |
347 | int adj = nsm_should_adj (nbr); | |
2d59836a | 348 | |
d7b0fb62 | 349 | if (nbr->state == NSM_TwoWay && adj == 1) |
8b6912c2 DS |
350 | { |
351 | next_state = NSM_ExStart; | |
352 | ||
353 | /* Send proactive ARP requests */ | |
354 | ospf_proactively_arp (nbr); | |
355 | } | |
d7b0fb62 | 356 | else if (nbr->state >= NSM_ExStart && adj == 0) |
2d59836a | 357 | next_state = NSM_TwoWay; |
358 | ||
359 | return next_state; | |
360 | } | |
361 | ||
d1b1cd8f PJ |
362 | /* Clear adjacency related state for a neighbour, intended where nbr |
363 | * transitions from > ExStart (i.e. a Full or forming adjacency) | |
364 | * to <= ExStart. | |
365 | */ | |
366 | static void | |
367 | nsm_clear_adj (struct ospf_neighbor *nbr) | |
2d59836a | 368 | { |
369 | /* Clear Database Summary list. */ | |
370 | if (!ospf_db_summary_isempty (nbr)) | |
371 | ospf_db_summary_clear (nbr); | |
372 | ||
373 | /* Clear Link State Request list. */ | |
374 | if (!ospf_ls_request_isempty (nbr)) | |
375 | ospf_ls_request_delete_all (nbr); | |
376 | ||
377 | /* Clear Link State Retransmission list. */ | |
378 | if (!ospf_ls_retransmit_isempty (nbr)) | |
379 | ospf_ls_retransmit_clear (nbr); | |
2d59836a | 380 | |
2d59836a | 381 | if (CHECK_FLAG (nbr->options, OSPF_OPTION_O)) |
382 | UNSET_FLAG (nbr->options, OSPF_OPTION_O); | |
2d59836a | 383 | } |
384 | ||
4dadc291 | 385 | static int |
2d59836a | 386 | nsm_kill_nbr (struct ospf_neighbor *nbr) |
387 | { | |
478aab98 | 388 | /* killing nbr_self is invalid */ |
478aab98 | 389 | if (nbr == nbr->oi->nbr_self) |
1f2c2743 PJ |
390 | { |
391 | assert (nbr != nbr->oi->nbr_self); | |
392 | return 0; | |
393 | } | |
478aab98 | 394 | |
2d59836a | 395 | if (nbr->oi->type == OSPF_IFTYPE_NBMA && nbr->nbr_nbma != NULL) |
396 | { | |
397 | struct ospf_nbr_nbma *nbr_nbma = nbr->nbr_nbma; | |
398 | ||
399 | nbr_nbma->nbr = NULL; | |
400 | nbr_nbma->state_change = nbr->state_change; | |
401 | ||
402 | nbr->nbr_nbma = NULL; | |
403 | ||
404 | OSPF_POLL_TIMER_ON (nbr_nbma->t_poll, ospf_poll_timer, | |
405 | nbr_nbma->v_poll); | |
406 | ||
407 | if (IS_DEBUG_OSPF (nsm, NSM_EVENTS)) | |
2a42e285 | 408 | zlog_debug ("NSM[%s:%s]: Down (PollIntervalTimer scheduled)", |
2d59836a | 409 | IF_NAME (nbr->oi), inet_ntoa (nbr->address.u.prefix4)); |
410 | } | |
411 | ||
2d59836a | 412 | return 0; |
413 | } | |
414 | ||
2d59836a | 415 | /* Neighbor State Machine */ |
416 | struct { | |
4dadc291 | 417 | int (*func) (struct ospf_neighbor *); |
2d59836a | 418 | int next_state; |
419 | } NSM [OSPF_NSM_STATE_MAX][OSPF_NSM_EVENT_MAX] = | |
420 | { | |
421 | { | |
422 | /* DependUpon: dummy state. */ | |
539e1523 | 423 | { NULL, NSM_DependUpon }, /* NoEvent */ |
57c5c652 | 424 | { NULL, NSM_DependUpon }, /* PacketReceived */ |
539e1523 PJ |
425 | { NULL, NSM_DependUpon }, /* Start */ |
426 | { NULL, NSM_DependUpon }, /* 2-WayReceived */ | |
427 | { NULL, NSM_DependUpon }, /* NegotiationDone */ | |
428 | { NULL, NSM_DependUpon }, /* ExchangeDone */ | |
429 | { NULL, NSM_DependUpon }, /* BadLSReq */ | |
430 | { NULL, NSM_DependUpon }, /* LoadingDone */ | |
431 | { NULL, NSM_DependUpon }, /* AdjOK? */ | |
432 | { NULL, NSM_DependUpon }, /* SeqNumberMismatch */ | |
433 | { NULL, NSM_DependUpon }, /* 1-WayReceived */ | |
434 | { NULL, NSM_DependUpon }, /* KillNbr */ | |
435 | { NULL, NSM_DependUpon }, /* InactivityTimer */ | |
436 | { NULL, NSM_DependUpon }, /* LLDown */ | |
2d59836a | 437 | }, |
1f2c2743 PJ |
438 | { |
439 | /* Deleted: dummy state. */ | |
539e1523 | 440 | { NULL, NSM_Deleted }, /* NoEvent */ |
57c5c652 | 441 | { NULL, NSM_Deleted }, /* PacketReceived */ |
539e1523 PJ |
442 | { NULL, NSM_Deleted }, /* Start */ |
443 | { NULL, NSM_Deleted }, /* 2-WayReceived */ | |
444 | { NULL, NSM_Deleted }, /* NegotiationDone */ | |
445 | { NULL, NSM_Deleted }, /* ExchangeDone */ | |
446 | { NULL, NSM_Deleted }, /* BadLSReq */ | |
447 | { NULL, NSM_Deleted }, /* LoadingDone */ | |
448 | { NULL, NSM_Deleted }, /* AdjOK? */ | |
449 | { NULL, NSM_Deleted }, /* SeqNumberMismatch */ | |
450 | { NULL, NSM_Deleted }, /* 1-WayReceived */ | |
451 | { NULL, NSM_Deleted }, /* KillNbr */ | |
452 | { NULL, NSM_Deleted }, /* InactivityTimer */ | |
453 | { NULL, NSM_Deleted }, /* LLDown */ | |
1f2c2743 | 454 | }, |
2d59836a | 455 | { |
456 | /* Down: */ | |
539e1523 | 457 | { NULL, NSM_DependUpon }, /* NoEvent */ |
57c5c652 | 458 | { nsm_packet_received, NSM_Init }, /* PacketReceived */ |
2d59836a | 459 | { nsm_start, NSM_Attempt }, /* Start */ |
539e1523 PJ |
460 | { NULL, NSM_Down }, /* 2-WayReceived */ |
461 | { NULL, NSM_Down }, /* NegotiationDone */ | |
462 | { NULL, NSM_Down }, /* ExchangeDone */ | |
463 | { NULL, NSM_Down }, /* BadLSReq */ | |
464 | { NULL, NSM_Down }, /* LoadingDone */ | |
465 | { NULL, NSM_Down }, /* AdjOK? */ | |
466 | { NULL, NSM_Down }, /* SeqNumberMismatch */ | |
467 | { NULL, NSM_Down }, /* 1-WayReceived */ | |
1f2c2743 | 468 | { nsm_kill_nbr, NSM_Deleted }, /* KillNbr */ |
539e1523 PJ |
469 | { nsm_kill_nbr, NSM_Deleted }, /* InactivityTimer */ |
470 | { nsm_kill_nbr, NSM_Deleted }, /* LLDown */ | |
2d59836a | 471 | }, |
472 | { | |
473 | /* Attempt: */ | |
539e1523 | 474 | { NULL, NSM_DependUpon }, /* NoEvent */ |
57c5c652 | 475 | { nsm_packet_received, NSM_Init }, /* PacketReceived */ |
539e1523 PJ |
476 | { NULL, NSM_Attempt }, /* Start */ |
477 | { NULL, NSM_Attempt }, /* 2-WayReceived */ | |
478 | { NULL, NSM_Attempt }, /* NegotiationDone */ | |
479 | { NULL, NSM_Attempt }, /* ExchangeDone */ | |
480 | { NULL, NSM_Attempt }, /* BadLSReq */ | |
481 | { NULL, NSM_Attempt }, /* LoadingDone */ | |
482 | { NULL, NSM_Attempt }, /* AdjOK? */ | |
483 | { NULL, NSM_Attempt }, /* SeqNumberMismatch */ | |
484 | { NULL, NSM_Attempt }, /* 1-WayReceived */ | |
1f2c2743 | 485 | { nsm_kill_nbr, NSM_Deleted }, /* KillNbr */ |
539e1523 PJ |
486 | { nsm_kill_nbr, NSM_Deleted }, /* InactivityTimer */ |
487 | { nsm_kill_nbr, NSM_Deleted }, /* LLDown */ | |
2d59836a | 488 | }, |
489 | { | |
490 | /* Init: */ | |
539e1523 | 491 | { NULL, NSM_DependUpon }, /* NoEvent */ |
57c5c652 | 492 | { nsm_packet_received, NSM_Init }, /* PacketReceived */ |
539e1523 | 493 | { NULL, NSM_Init }, /* Start */ |
2d59836a | 494 | { nsm_twoway_received, NSM_DependUpon }, /* 2-WayReceived */ |
539e1523 PJ |
495 | { NULL, NSM_Init }, /* NegotiationDone */ |
496 | { NULL, NSM_Init }, /* ExchangeDone */ | |
497 | { NULL, NSM_Init }, /* BadLSReq */ | |
498 | { NULL, NSM_Init }, /* LoadingDone */ | |
499 | { NULL, NSM_Init }, /* AdjOK? */ | |
500 | { NULL, NSM_Init }, /* SeqNumberMismatch */ | |
501 | { NULL, NSM_Init }, /* 1-WayReceived */ | |
1f2c2743 | 502 | { nsm_kill_nbr, NSM_Deleted }, /* KillNbr */ |
539e1523 PJ |
503 | { nsm_kill_nbr, NSM_Deleted }, /* InactivityTimer */ |
504 | { nsm_kill_nbr, NSM_Deleted }, /* LLDown */ | |
2d59836a | 505 | }, |
506 | { | |
507 | /* 2-Way: */ | |
539e1523 | 508 | { NULL, NSM_DependUpon }, /* NoEvent */ |
57c5c652 | 509 | { nsm_packet_received, NSM_TwoWay }, /* HelloReceived */ |
539e1523 PJ |
510 | { NULL, NSM_TwoWay }, /* Start */ |
511 | { NULL, NSM_TwoWay }, /* 2-WayReceived */ | |
512 | { NULL, NSM_TwoWay }, /* NegotiationDone */ | |
513 | { NULL, NSM_TwoWay }, /* ExchangeDone */ | |
514 | { NULL, NSM_TwoWay }, /* BadLSReq */ | |
515 | { NULL, NSM_TwoWay }, /* LoadingDone */ | |
2d59836a | 516 | { nsm_adj_ok, NSM_DependUpon }, /* AdjOK? */ |
539e1523 PJ |
517 | { NULL, NSM_TwoWay }, /* SeqNumberMismatch */ |
518 | { NULL, NSM_Init }, /* 1-WayReceived */ | |
1f2c2743 | 519 | { nsm_kill_nbr, NSM_Deleted }, /* KillNbr */ |
539e1523 PJ |
520 | { nsm_kill_nbr, NSM_Deleted }, /* InactivityTimer */ |
521 | { nsm_kill_nbr, NSM_Deleted }, /* LLDown */ | |
2d59836a | 522 | }, |
523 | { | |
524 | /* ExStart: */ | |
539e1523 | 525 | { NULL, NSM_DependUpon }, /* NoEvent */ |
57c5c652 | 526 | { nsm_packet_received, NSM_ExStart }, /* PacaketReceived */ |
539e1523 PJ |
527 | { NULL, NSM_ExStart }, /* Start */ |
528 | { NULL, NSM_ExStart }, /* 2-WayReceived */ | |
2d59836a | 529 | { nsm_negotiation_done, NSM_Exchange }, /* NegotiationDone */ |
539e1523 PJ |
530 | { NULL, NSM_ExStart }, /* ExchangeDone */ |
531 | { NULL, NSM_ExStart }, /* BadLSReq */ | |
532 | { NULL, NSM_ExStart }, /* LoadingDone */ | |
2d59836a | 533 | { nsm_adj_ok, NSM_DependUpon }, /* AdjOK? */ |
539e1523 PJ |
534 | { NULL, NSM_ExStart }, /* SeqNumberMismatch */ |
535 | { NULL, NSM_Init }, /* 1-WayReceived */ | |
1f2c2743 | 536 | { nsm_kill_nbr, NSM_Deleted }, /* KillNbr */ |
539e1523 PJ |
537 | { nsm_kill_nbr, NSM_Deleted }, /* InactivityTimer */ |
538 | { nsm_kill_nbr, NSM_Deleted }, /* LLDown */ | |
2d59836a | 539 | }, |
540 | { | |
541 | /* Exchange: */ | |
539e1523 | 542 | { NULL, NSM_DependUpon }, /* NoEvent */ |
57c5c652 | 543 | { nsm_packet_received, NSM_Exchange }, /* PacketReceived */ |
539e1523 PJ |
544 | { NULL, NSM_Exchange }, /* Start */ |
545 | { NULL, NSM_Exchange }, /* 2-WayReceived */ | |
546 | { NULL, NSM_Exchange }, /* NegotiationDone */ | |
2d59836a | 547 | { nsm_exchange_done, NSM_DependUpon }, /* ExchangeDone */ |
539e1523 PJ |
548 | { NULL, NSM_ExStart }, /* BadLSReq */ |
549 | { NULL, NSM_Exchange }, /* LoadingDone */ | |
2d59836a | 550 | { nsm_adj_ok, NSM_DependUpon }, /* AdjOK? */ |
539e1523 PJ |
551 | { NULL, NSM_ExStart }, /* SeqNumberMismatch */ |
552 | { NULL, NSM_Init }, /* 1-WayReceived */ | |
1f2c2743 | 553 | { nsm_kill_nbr, NSM_Deleted }, /* KillNbr */ |
539e1523 PJ |
554 | { nsm_kill_nbr, NSM_Deleted }, /* InactivityTimer */ |
555 | { nsm_kill_nbr, NSM_Deleted }, /* LLDown */ | |
2d59836a | 556 | }, |
557 | { | |
558 | /* Loading: */ | |
539e1523 | 559 | { NULL, NSM_DependUpon }, /* NoEvent */ |
57c5c652 | 560 | { nsm_packet_received, NSM_Loading }, /* PacketReceived */ |
539e1523 PJ |
561 | { NULL, NSM_Loading }, /* Start */ |
562 | { NULL, NSM_Loading }, /* 2-WayReceived */ | |
563 | { NULL, NSM_Loading }, /* NegotiationDone */ | |
564 | { NULL, NSM_Loading }, /* ExchangeDone */ | |
565 | { NULL, NSM_ExStart }, /* BadLSReq */ | |
566 | { NULL, NSM_Full }, /* LoadingDone */ | |
2d59836a | 567 | { nsm_adj_ok, NSM_DependUpon }, /* AdjOK? */ |
539e1523 PJ |
568 | { NULL, NSM_ExStart }, /* SeqNumberMismatch */ |
569 | { NULL, NSM_Init }, /* 1-WayReceived */ | |
1f2c2743 | 570 | { nsm_kill_nbr, NSM_Deleted }, /* KillNbr */ |
539e1523 PJ |
571 | { nsm_kill_nbr, NSM_Deleted }, /* InactivityTimer */ |
572 | { nsm_kill_nbr, NSM_Deleted }, /* LLDown */ | |
2d59836a | 573 | }, |
574 | { /* Full: */ | |
539e1523 | 575 | { NULL, NSM_DependUpon }, /* NoEvent */ |
57c5c652 | 576 | { nsm_packet_received, NSM_Full }, /* PacketReceived */ |
539e1523 PJ |
577 | { NULL, NSM_Full }, /* Start */ |
578 | { NULL, NSM_Full }, /* 2-WayReceived */ | |
579 | { NULL, NSM_Full }, /* NegotiationDone */ | |
580 | { NULL, NSM_Full }, /* ExchangeDone */ | |
581 | { NULL, NSM_ExStart }, /* BadLSReq */ | |
582 | { NULL, NSM_Full }, /* LoadingDone */ | |
2d59836a | 583 | { nsm_adj_ok, NSM_DependUpon }, /* AdjOK? */ |
539e1523 PJ |
584 | { NULL, NSM_ExStart }, /* SeqNumberMismatch */ |
585 | { NULL, NSM_Init }, /* 1-WayReceived */ | |
1f2c2743 | 586 | { nsm_kill_nbr, NSM_Deleted }, /* KillNbr */ |
539e1523 PJ |
587 | { nsm_kill_nbr, NSM_Deleted }, /* InactivityTimer */ |
588 | { nsm_kill_nbr, NSM_Deleted }, /* LLDown */ | |
2d59836a | 589 | }, |
590 | }; | |
591 | ||
30a2231a | 592 | static const char *ospf_nsm_event_str[] = |
2d59836a | 593 | { |
594 | "NoEvent", | |
57c5c652 | 595 | "PacketReceived", |
2d59836a | 596 | "Start", |
597 | "2-WayReceived", | |
598 | "NegotiationDone", | |
599 | "ExchangeDone", | |
600 | "BadLSReq", | |
601 | "LoadingDone", | |
602 | "AdjOK?", | |
603 | "SeqNumberMismatch", | |
604 | "1-WayReceived", | |
605 | "KillNbr", | |
606 | "InactivityTimer", | |
607 | "LLDown", | |
608 | }; | |
609 | ||
3d63f380 PJ |
610 | static void |
611 | nsm_notice_state_change (struct ospf_neighbor *nbr, int next_state, int event) | |
612 | { | |
613 | /* Logging change of status. */ | |
614 | if (IS_DEBUG_OSPF (nsm, NSM_STATUS)) | |
615 | zlog_debug ("NSM[%s:%s]: State change %s -> %s (%s)", | |
616 | IF_NAME (nbr->oi), inet_ntoa (nbr->router_id), | |
617 | LOOKUP (ospf_nsm_state_msg, nbr->state), | |
618 | LOOKUP (ospf_nsm_state_msg, next_state), | |
619 | ospf_nsm_event_str [event]); | |
620 | ||
621 | /* Optionally notify about adjacency changes */ | |
622 | if (CHECK_FLAG(nbr->oi->ospf->config, OSPF_LOG_ADJACENCY_CHANGES) && | |
623 | (CHECK_FLAG(nbr->oi->ospf->config, OSPF_LOG_ADJACENCY_DETAIL) || | |
624 | (next_state == NSM_Full) || (next_state < nbr->state))) | |
625 | zlog_notice("AdjChg: Nbr %s on %s: %s -> %s (%s)", | |
626 | inet_ntoa (nbr->router_id), IF_NAME (nbr->oi), | |
627 | LOOKUP (ospf_nsm_state_msg, nbr->state), | |
628 | LOOKUP (ospf_nsm_state_msg, next_state), | |
629 | ospf_nsm_event_str [event]); | |
630 | ||
3fed4160 PJ |
631 | /* Advance in NSM */ |
632 | if (next_state > nbr->state) | |
6ced0e7f | 633 | monotime(&nbr->ts_last_progress); |
3fed4160 PJ |
634 | else /* regression in NSM */ |
635 | { | |
6ced0e7f | 636 | monotime(&nbr->ts_last_regress); |
3fed4160 PJ |
637 | nbr->last_regress_str = ospf_nsm_event_str [event]; |
638 | } | |
90c33177 | 639 | |
3d63f380 PJ |
640 | } |
641 | ||
de54b26c | 642 | static void |
2d59836a | 643 | nsm_change_state (struct ospf_neighbor *nbr, int state) |
644 | { | |
68980084 | 645 | struct ospf_interface *oi = nbr->oi; |
2d59836a | 646 | struct ospf_area *vl_area = NULL; |
647 | u_char old_state; | |
648 | int x; | |
649 | int force = 1; | |
650 | ||
2d59836a | 651 | /* Preserve old status. */ |
652 | old_state = nbr->state; | |
653 | ||
654 | /* Change to new status. */ | |
655 | nbr->state = state; | |
656 | ||
657 | /* Statistics. */ | |
658 | nbr->state_change++; | |
659 | ||
2d59836a | 660 | if (oi->type == OSPF_IFTYPE_VIRTUALLINK) |
68980084 | 661 | vl_area = ospf_area_lookup_by_area_id (oi->ospf, oi->vl_data->vl_area_id); |
d7e60dd7 | 662 | |
7a9d983e CF |
663 | /* Generate NeighborChange ISM event. |
664 | * | |
665 | * In response to NeighborChange, DR election is rerun. The information | |
666 | * from the election process is required by the router-lsa construction. | |
667 | * | |
668 | * Therefore, trigger the event prior to refreshing the LSAs. */ | |
669 | switch (oi->state) { | |
670 | case ISM_DROther: | |
671 | case ISM_Backup: | |
672 | case ISM_DR: | |
673 | if ((old_state < NSM_TwoWay && state >= NSM_TwoWay) || | |
674 | (old_state >= NSM_TwoWay && state < NSM_TwoWay)) | |
675 | OSPF_ISM_EVENT_EXECUTE (oi, ISM_NeighborChange); | |
676 | break; | |
677 | default: | |
678 | /* ISM_PointToPoint -> ISM_Down, ISM_Loopback -> ISM_Down, etc. */ | |
679 | break; | |
680 | } | |
681 | ||
2d59836a | 682 | /* One of the neighboring routers changes to/from the FULL state. */ |
683 | if ((old_state != NSM_Full && state == NSM_Full) || | |
684 | (old_state == NSM_Full && state != NSM_Full)) | |
3aa8d5f9 | 685 | { |
2d59836a | 686 | if (state == NSM_Full) |
687 | { | |
688 | oi->full_nbrs++; | |
689 | oi->area->full_nbrs++; | |
690 | ||
68980084 | 691 | ospf_check_abr_status (oi->ospf); |
2d59836a | 692 | |
693 | if (oi->type == OSPF_IFTYPE_VIRTUALLINK && vl_area) | |
694 | if (++vl_area->full_vls == 1) | |
68980084 | 695 | ospf_schedule_abr_task (oi->ospf); |
2d59836a | 696 | |
697 | /* kevinm: refresh any redistributions */ | |
68980084 | 698 | for (x = ZEBRA_ROUTE_SYSTEM; x < ZEBRA_ROUTE_MAX; x++) |
699 | { | |
7c8ff89e DS |
700 | struct list *red_list; |
701 | struct listnode *node; | |
702 | struct ospf_redist *red; | |
703 | ||
704 | if (x == ZEBRA_ROUTE_OSPF6) | |
705 | continue; | |
706 | ||
707 | red_list = oi->ospf->redist[x]; | |
708 | if (!red_list) | |
709 | continue; | |
710 | ||
711 | for (ALL_LIST_ELEMENTS_RO(red_list, node, red)) | |
712 | ospf_external_lsa_refresh_type (oi->ospf, x, red->instance, force); | |
68980084 | 713 | } |
9fd4958a DN |
714 | /* XXX: Clearly some thing is wrong with refresh of external LSAs |
715 | * this added to hack around defaults not refreshing after a timer | |
716 | * jump. | |
717 | */ | |
718 | ospf_external_lsa_refresh_default (oi->ospf); | |
2d59836a | 719 | } |
720 | else | |
721 | { | |
722 | oi->full_nbrs--; | |
723 | oi->area->full_nbrs--; | |
724 | ||
68980084 | 725 | ospf_check_abr_status (oi->ospf); |
2d59836a | 726 | |
727 | if (oi->type == OSPF_IFTYPE_VIRTUALLINK && vl_area) | |
728 | if (vl_area->full_vls > 0) | |
729 | if (--vl_area->full_vls == 0) | |
68980084 | 730 | ospf_schedule_abr_task (oi->ospf); |
2d59836a | 731 | } |
732 | ||
3aa8d5f9 | 733 | zlog_info ("nsm_change_state(%s, %s -> %s): " |
734 | "scheduling new router-LSA origination", | |
735 | inet_ntoa (nbr->router_id), | |
736 | LOOKUP(ospf_nsm_state_msg, old_state), | |
737 | LOOKUP(ospf_nsm_state_msg, state)); | |
2d59836a | 738 | |
c363d386 | 739 | ospf_router_lsa_update_area (oi->area); |
2d59836a | 740 | |
741 | if (oi->type == OSPF_IFTYPE_VIRTUALLINK) | |
742 | { | |
743 | struct ospf_area *vl_area = | |
68980084 | 744 | ospf_area_lookup_by_area_id (oi->ospf, oi->vl_data->vl_area_id); |
2d59836a | 745 | |
746 | if (vl_area) | |
c363d386 | 747 | ospf_router_lsa_update_area (vl_area); |
2d59836a | 748 | } |
749 | ||
750 | /* Originate network-LSA. */ | |
751 | if (oi->state == ISM_DR) | |
752 | { | |
753 | if (oi->network_lsa_self && oi->full_nbrs == 0) | |
754 | { | |
755 | ospf_lsa_flush_area (oi->network_lsa_self, oi->area); | |
1fe6ed38 | 756 | ospf_lsa_unlock (&oi->network_lsa_self); |
2d59836a | 757 | oi->network_lsa_self = NULL; |
2d59836a | 758 | } |
759 | else | |
c363d386 | 760 | ospf_network_lsa_update (oi); |
2d59836a | 761 | } |
762 | } | |
763 | ||
2d59836a | 764 | ospf_opaque_nsm_change (nbr, old_state); |
2d59836a | 765 | |
d1b1cd8f PJ |
766 | /* State changes from > ExStart to <= ExStart should clear any Exchange |
767 | * or Full/LSA Update related lists and state. | |
768 | * Potential causal events: BadLSReq, SeqNumberMismatch, AdjOK? | |
d1b1cd8f | 769 | */ |
539e1523 | 770 | if ((old_state > NSM_ExStart) && (state <= NSM_ExStart)) |
d1b1cd8f PJ |
771 | nsm_clear_adj (nbr); |
772 | ||
2d59836a | 773 | /* Start DD exchange protocol */ |
774 | if (state == NSM_ExStart) | |
775 | { | |
776 | if (nbr->dd_seqnum == 0) | |
833a7ff9 | 777 | nbr->dd_seqnum = (uint32_t)random (); |
2d59836a | 778 | else |
779 | nbr->dd_seqnum++; | |
780 | ||
781 | nbr->dd_flags = OSPF_DD_FLAG_I|OSPF_DD_FLAG_M|OSPF_DD_FLAG_MS; | |
782 | ospf_db_desc_send (nbr); | |
783 | } | |
784 | ||
785 | /* clear cryptographic sequence number */ | |
786 | if (state == NSM_Down) | |
787 | nbr->crypt_seqnum = 0; | |
788 | ||
7f342629 DS |
789 | ospf_bfd_trigger_event(nbr, old_state, state); |
790 | ||
2d59836a | 791 | /* Preserve old status? */ |
792 | } | |
793 | ||
794 | /* Execute NSM event process. */ | |
795 | int | |
796 | ospf_nsm_event (struct thread *thread) | |
797 | { | |
798 | int event; | |
799 | int next_state; | |
800 | struct ospf_neighbor *nbr; | |
2d59836a | 801 | |
802 | nbr = THREAD_ARG (thread); | |
803 | event = THREAD_VAL (thread); | |
2d59836a | 804 | |
3d63f380 PJ |
805 | if (IS_DEBUG_OSPF (nsm, NSM_EVENTS)) |
806 | zlog_debug ("NSM[%s:%s]: %s (%s)", IF_NAME (nbr->oi), | |
807 | inet_ntoa (nbr->router_id), | |
808 | LOOKUP (ospf_nsm_state_msg, nbr->state), | |
809 | ospf_nsm_event_str [event]); | |
810 | ||
539e1523 | 811 | next_state = NSM [nbr->state][event].next_state; |
2d59836a | 812 | |
539e1523 PJ |
813 | /* Call function. */ |
814 | if (NSM [nbr->state][event].func != NULL) | |
ba0beb4a | 815 | { |
539e1523 | 816 | int func_state = (*(NSM [nbr->state][event].func))(nbr); |
ba0beb4a | 817 | |
539e1523 PJ |
818 | if (NSM [nbr->state][event].next_state == NSM_DependUpon) |
819 | next_state = func_state; | |
820 | else if (func_state) | |
821 | { | |
822 | /* There's a mismatch between the FSM tables and what an FSM | |
823 | * action/state-change function returned. State changes which | |
824 | * do not have conditional/DependUpon next-states should not | |
825 | * try set next_state. | |
826 | */ | |
827 | zlog_warn ("NSM[%s:%s]: %s (%s): " | |
828 | "Warning: action tried to change next_state to %s", | |
829 | IF_NAME (nbr->oi), inet_ntoa (nbr->router_id), | |
830 | LOOKUP (ospf_nsm_state_msg, nbr->state), | |
831 | ospf_nsm_event_str [event], | |
832 | LOOKUP (ospf_nsm_state_msg, func_state)); | |
833 | } | |
ba0beb4a | 834 | } |
2d59836a | 835 | |
539e1523 PJ |
836 | assert (next_state != NSM_DependUpon); |
837 | ||
2d59836a | 838 | /* If state is changed. */ |
839 | if (next_state != nbr->state) | |
3d63f380 PJ |
840 | { |
841 | nsm_notice_state_change (nbr, next_state, event); | |
66239ca6 FS |
842 | #ifdef HAVE_SNMP |
843 | int send_trap_virt = 0; | |
844 | int send_trap = 0; | |
845 | /* Terminal state or regression */ | |
846 | if ((next_state == NSM_Full) | |
847 | || (next_state == NSM_TwoWay) | |
848 | || (next_state < nbr->state)) | |
849 | { | |
850 | /* ospfVirtNbrStateChange */ | |
851 | if (nbr->oi->type == OSPF_IFTYPE_VIRTUALLINK) | |
852 | send_trap_virt = 1; | |
853 | /* ospfNbrStateChange trap */ | |
854 | else | |
855 | /* To/From FULL, only managed by DR */ | |
856 | if (((next_state != NSM_Full) && (nbr->state != NSM_Full)) | |
857 | || (nbr->oi->state == ISM_DR)) | |
858 | send_trap = 1; | |
859 | } | |
860 | #endif | |
3d63f380 | 861 | nsm_change_state (nbr, next_state); |
66239ca6 FS |
862 | |
863 | #ifdef HAVE_SNMP | |
864 | if (send_trap_virt) { | |
865 | ospfTrapVirtNbrStateChange(nbr); | |
866 | } else if (send_trap) { | |
867 | ospfTrapNbrStateChange(nbr); | |
868 | } | |
869 | #endif | |
3d63f380 | 870 | } |
2d59836a | 871 | |
872 | /* Make sure timer is set. */ | |
873 | nsm_timer_set (nbr); | |
874 | ||
1f2c2743 PJ |
875 | /* When event is NSM_KillNbr, InactivityTimer or LLDown, the neighbor |
876 | * is deleted. | |
877 | * | |
878 | * Rather than encode knowledge here of which events lead to NBR | |
879 | * delete, we take our cue from the NSM table, via the dummy | |
880 | * 'Deleted' neighbour state. | |
881 | */ | |
882 | if (nbr->state == NSM_Deleted) | |
883 | ospf_nbr_delete (nbr); | |
884 | ||
2d59836a | 885 | return 0; |
886 | } | |
887 | ||
888 | /* Check loading state. */ | |
889 | void | |
890 | ospf_check_nbr_loading (struct ospf_neighbor *nbr) | |
891 | { | |
892 | if (nbr->state == NSM_Loading) | |
893 | { | |
894 | if (ospf_ls_request_isempty (nbr)) | |
895 | OSPF_NSM_EVENT_SCHEDULE (nbr, NSM_LoadingDone); | |
896 | else if (nbr->ls_req_last == NULL) | |
897 | ospf_ls_req_event (nbr); | |
898 | } | |
899 | } |