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06bc3110 | 1 | /* |
2 | * OSPF Graceful Restart helper functions. | |
3 | * | |
4 | * Copyright (C) 2020-21 Vmware, Inc. | |
5 | * Rajesh Kumar Girada | |
6 | * | |
7 | * This file is part of GNU Zebra. | |
8 | * | |
9 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2, or (at your option) any | |
12 | * later version. | |
13 | * | |
14 | * GNU Zebra is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
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 | |
22 | */ | |
23 | ||
24 | #include <zebra.h> | |
25 | ||
26 | #include "thread.h" | |
27 | #include "memory.h" | |
28 | #include "linklist.h" | |
29 | #include "prefix.h" | |
30 | #include "if.h" | |
31 | #include "table.h" | |
32 | #include "vty.h" | |
33 | #include "filter.h" | |
34 | #include "log.h" | |
35 | #include "jhash.h" | |
36 | ||
37 | #include "ospfd/ospfd.h" | |
38 | #include "ospfd/ospf_interface.h" | |
39 | #include "ospfd/ospf_asbr.h" | |
40 | #include "ospfd/ospf_lsa.h" | |
41 | #include "ospfd/ospf_lsdb.h" | |
42 | #include "ospfd/ospf_neighbor.h" | |
43 | #include "ospfd/ospf_spf.h" | |
44 | #include "ospfd/ospf_flood.h" | |
45 | #include "ospfd/ospf_route.h" | |
46 | #include "ospfd/ospf_zebra.h" | |
47 | #include "ospfd/ospf_dump.h" | |
48 | #include "ospfd/ospf_errors.h" | |
49 | #include "ospfd/ospf_nsm.h" | |
50 | #include "ospfd/ospf_ism.h" | |
cd52c44c | 51 | #include "ospfd/ospf_gr.h" |
06bc3110 | 52 | |
d05d5280 | 53 | static const char * const ospf_exit_reason_desc[] = { |
ad686992 | 54 | "Unknown reason", |
98cb53f9 | 55 | "Helper in progress", |
ad686992 | 56 | "Topology Change", |
d05d5280 | 57 | "Grace timer expiry", |
ad686992 | 58 | "Successful graceful restart", |
59 | }; | |
60 | ||
d05d5280 | 61 | static const char * const ospf_restart_reason_desc[] = { |
ad686992 | 62 | "Unknown restart", |
63 | "Software restart", | |
64 | "Software reload/upgrade", | |
65 | "Switch to redundant control processor", | |
66 | }; | |
67 | ||
d05d5280 | 68 | static const char * const ospf_rejected_reason_desc[] = { |
ad686992 | 69 | "Unknown reason", |
70 | "Helper support disabled", | |
71 | "Neighbour is not in FULL state", | |
d05d5280 | 72 | "Supports only planned restart but received unplanned", |
ad686992 | 73 | "Topo change due to change in lsa rxmt list", |
74 | "LSA age is more than Grace interval", | |
10514170 | 75 | "Router is in the process of graceful restart", |
ad686992 | 76 | }; |
77 | ||
3e63092b RW |
78 | static void show_ospf_grace_lsa_info(struct vty *vty, struct json_object *json, |
79 | struct ospf_lsa *lsa); | |
ad686992 | 80 | static bool ospf_check_change_in_rxmt_list(struct ospf_neighbor *nbr); |
06bc3110 | 81 | |
82 | static unsigned int ospf_enable_rtr_hash_key(const void *data) | |
83 | { | |
84 | const struct advRtr *rtr = data; | |
85 | ||
86 | return jhash_1word(rtr->advRtrAddr.s_addr, 0); | |
87 | } | |
88 | ||
89 | static bool ospf_enable_rtr_hash_cmp(const void *d1, const void *d2) | |
90 | { | |
91 | const struct advRtr *rtr1 = (struct advRtr *)d1; | |
92 | const struct advRtr *rtr2 = (struct advRtr *)d2; | |
93 | ||
94 | return (rtr1->advRtrAddr.s_addr == rtr2->advRtrAddr.s_addr); | |
95 | } | |
96 | ||
97 | static void *ospf_enable_rtr_hash_alloc(void *p) | |
98 | { | |
99 | struct advRtr *rid; | |
100 | ||
101 | rid = XCALLOC(MTYPE_OSPF_GR_HELPER, sizeof(struct advRtr)); | |
102 | rid->advRtrAddr.s_addr = ((struct in_addr *)p)->s_addr; | |
103 | ||
104 | return rid; | |
105 | } | |
106 | ||
107 | static void ospf_disable_rtr_hash_free(void *rtr) | |
108 | { | |
109 | XFREE(MTYPE_OSPF_GR_HELPER, rtr); | |
110 | } | |
111 | ||
112 | static void ospf_enable_rtr_hash_destroy(struct ospf *ospf) | |
113 | { | |
114 | if (ospf->enable_rtr_list == NULL) | |
115 | return; | |
116 | ||
117 | hash_clean(ospf->enable_rtr_list, ospf_disable_rtr_hash_free); | |
118 | hash_free(ospf->enable_rtr_list); | |
119 | ospf->enable_rtr_list = NULL; | |
120 | } | |
121 | ||
d05d5280 MS |
122 | /* |
123 | * GR exit reason strings | |
124 | */ | |
125 | const char *ospf_exit_reason2str(unsigned int reason) | |
126 | { | |
127 | if (reason < array_size(ospf_exit_reason_desc)) | |
128 | return(ospf_exit_reason_desc[reason]); | |
129 | else | |
130 | return "Invalid reason"; | |
131 | } | |
132 | ||
133 | /* | |
134 | * GR restart reason strings | |
135 | */ | |
136 | const char *ospf_restart_reason2str(unsigned int reason) | |
137 | { | |
138 | if (reason < array_size(ospf_restart_reason_desc)) | |
139 | return(ospf_restart_reason_desc[reason]); | |
140 | else | |
141 | return "Invalid reason"; | |
142 | } | |
143 | ||
144 | /* | |
145 | * GR rejected reason strings | |
146 | */ | |
147 | const char *ospf_rejected_reason2str(unsigned int reason) | |
148 | { | |
149 | if (reason < array_size(ospf_rejected_reason_desc)) | |
150 | return(ospf_rejected_reason_desc[reason]); | |
151 | else | |
152 | return "Invalid reason"; | |
153 | } | |
154 | ||
06bc3110 | 155 | /* |
156 | * Initialize GR helper config data structures. | |
157 | * | |
158 | * OSPF | |
159 | * OSPF pointer | |
160 | * | |
161 | * Returns: | |
162 | * Nothing | |
163 | */ | |
51f8588e | 164 | void ospf_gr_helper_instance_init(struct ospf *ospf) |
06bc3110 | 165 | { |
3f87e1d8 | 166 | if (IS_DEBUG_OSPF_GR) |
a4544597 | 167 | zlog_debug("%s, GR Helper init.", __func__); |
06bc3110 | 168 | |
ad686992 | 169 | ospf->is_helper_supported = OSPF_GR_FALSE; |
170 | ospf->strict_lsa_check = OSPF_GR_TRUE; | |
171 | ospf->only_planned_restart = OSPF_GR_FALSE; | |
06bc3110 | 172 | ospf->supported_grace_time = OSPF_MAX_GRACE_INTERVAL; |
173 | ospf->last_exit_reason = OSPF_GR_HELPER_EXIT_NONE; | |
174 | ospf->active_restarter_cnt = 0; | |
175 | ||
176 | ospf->enable_rtr_list = | |
177 | hash_create(ospf_enable_rtr_hash_key, ospf_enable_rtr_hash_cmp, | |
178 | "OSPF enable router hash"); | |
51f8588e RW |
179 | } |
180 | ||
181 | /* | |
182 | * De-Initialize GR helper config data structures. | |
183 | * | |
184 | * OSPF | |
185 | * OSPF pointer | |
186 | * | |
187 | * Returns: | |
188 | * Nothing | |
189 | */ | |
190 | void ospf_gr_helper_instance_stop(struct ospf *ospf) | |
191 | { | |
3f87e1d8 | 192 | if (IS_DEBUG_OSPF_GR) |
51f8588e RW |
193 | zlog_debug("%s, GR helper deinit.", __func__); |
194 | ||
195 | ospf_enable_rtr_hash_destroy(ospf); | |
196 | } | |
197 | ||
198 | /* | |
199 | * Initialize GR helper config data structures. | |
200 | * | |
201 | * Returns: | |
202 | * Nothing | |
203 | */ | |
204 | void ospf_gr_helper_init(void) | |
205 | { | |
206 | int rc; | |
207 | ||
3f87e1d8 | 208 | if (IS_DEBUG_OSPF_GR) |
51f8588e | 209 | zlog_debug("%s, GR Helper init.", __func__); |
abd5b8c7 | 210 | |
211 | rc = ospf_register_opaque_functab( | |
212 | OSPF_OPAQUE_LINK_LSA, OPAQUE_TYPE_GRACE_LSA, NULL, NULL, NULL, | |
213 | NULL, NULL, NULL, NULL, show_ospf_grace_lsa_info, NULL, NULL, | |
214 | NULL, NULL); | |
215 | if (rc != 0) { | |
216 | flog_warn(EC_OSPF_OPAQUE_REGISTRATION, | |
217 | "%s: Failed to register Grace LSA functions", | |
218 | __func__); | |
219 | } | |
06bc3110 | 220 | } |
221 | ||
222 | /* | |
223 | * De-Initialize GR helper config data structures. | |
224 | * | |
06bc3110 | 225 | * Returns: |
226 | * Nothing | |
227 | */ | |
51f8588e | 228 | void ospf_gr_helper_stop(void) |
06bc3110 | 229 | { |
3f87e1d8 | 230 | if (IS_DEBUG_OSPF_GR) |
a4544597 | 231 | zlog_debug("%s, GR helper deinit.", __func__); |
06bc3110 | 232 | |
abd5b8c7 | 233 | ospf_delete_opaque_functab(OSPF_OPAQUE_LINK_LSA, OPAQUE_TYPE_GRACE_LSA); |
06bc3110 | 234 | } |
ad686992 | 235 | |
236 | /* | |
237 | * Extracting tlv info from GRACE LSA. | |
238 | * | |
239 | * lsa | |
240 | * ospf grace lsa | |
241 | * | |
242 | * Returns: | |
243 | * interval : grace interval. | |
244 | * addr : RESTARTER address. | |
245 | * reason : Restarting reason. | |
246 | */ | |
247 | static int ospf_extract_grace_lsa_fields(struct ospf_lsa *lsa, | |
248 | uint32_t *interval, | |
249 | struct in_addr *addr, uint8_t *reason) | |
250 | { | |
251 | struct lsa_header *lsah = NULL; | |
252 | struct tlv_header *tlvh = NULL; | |
253 | struct grace_tlv_graceperiod *grace_period; | |
254 | struct grace_tlv_restart_reason *gr_reason; | |
255 | struct grace_tlv_restart_addr *restart_addr; | |
256 | uint16_t length = 0; | |
257 | int sum = 0; | |
258 | ||
259 | lsah = (struct lsa_header *)lsa->data; | |
260 | ||
d8193748 | 261 | /* Check LSA len */ |
8db278b5 | 262 | if (lsa->size <= OSPF_LSA_HEADER_SIZE) { |
3f87e1d8 | 263 | if (IS_DEBUG_OSPF_GR) |
d8193748 MS |
264 | zlog_debug("%s: Malformed packet: Invalid LSA len:%d", |
265 | __func__, length); | |
266 | return OSPF_GR_FAILURE; | |
267 | } | |
268 | ||
8db278b5 | 269 | length = lsa->size - OSPF_LSA_HEADER_SIZE; |
ad686992 | 270 | |
8db278b5 | 271 | for (tlvh = TLV_HDR_TOP(lsah); sum < length && tlvh; |
ad686992 | 272 | tlvh = TLV_HDR_NEXT(tlvh)) { |
d8193748 MS |
273 | |
274 | /* Check TLV len against overall LSA */ | |
275 | if (sum + TLV_SIZE(tlvh) > length) { | |
3f87e1d8 | 276 | if (IS_DEBUG_OSPF_GR) |
72327cf3 | 277 | zlog_debug("%s: Malformed packet: Invalid TLV len:%u", |
d8193748 MS |
278 | __func__, TLV_SIZE(tlvh)); |
279 | return OSPF_GR_FAILURE; | |
280 | } | |
281 | ||
ad686992 | 282 | switch (ntohs(tlvh->type)) { |
283 | case GRACE_PERIOD_TYPE: | |
d8193748 MS |
284 | if (TLV_SIZE(tlvh) < |
285 | sizeof(struct grace_tlv_graceperiod)) { | |
72327cf3 | 286 | zlog_debug("%s: Malformed packet: Invalid grace TLV len:%u", |
d8193748 MS |
287 | __func__, TLV_SIZE(tlvh)); |
288 | return OSPF_GR_FAILURE; | |
289 | } | |
290 | ||
ad686992 | 291 | grace_period = (struct grace_tlv_graceperiod *)tlvh; |
292 | *interval = ntohl(grace_period->interval); | |
293 | sum += TLV_SIZE(tlvh); | |
294 | ||
295 | /* Check if grace interval is valid */ | |
296 | if (*interval > OSPF_MAX_GRACE_INTERVAL | |
297 | || *interval < OSPF_MIN_GRACE_INTERVAL) | |
298 | return OSPF_GR_FAILURE; | |
299 | break; | |
300 | case RESTART_REASON_TYPE: | |
d8193748 MS |
301 | if (TLV_SIZE(tlvh) < |
302 | sizeof(struct grace_tlv_restart_reason)) { | |
72327cf3 | 303 | zlog_debug("%s: Malformed packet: Invalid reason TLV len:%u", |
d8193748 MS |
304 | __func__, TLV_SIZE(tlvh)); |
305 | return OSPF_GR_FAILURE; | |
306 | } | |
307 | ||
ad686992 | 308 | gr_reason = (struct grace_tlv_restart_reason *)tlvh; |
309 | *reason = gr_reason->reason; | |
310 | sum += TLV_SIZE(tlvh); | |
311 | ||
312 | if (*reason >= OSPF_GR_INVALID_REASON_CODE) | |
313 | return OSPF_GR_FAILURE; | |
314 | break; | |
315 | case RESTARTER_IP_ADDR_TYPE: | |
d8193748 MS |
316 | if (TLV_SIZE(tlvh) < |
317 | sizeof(struct grace_tlv_restart_addr)) { | |
72327cf3 | 318 | zlog_debug("%s: Malformed packet: Invalid addr TLV len:%u", |
d8193748 MS |
319 | __func__, TLV_SIZE(tlvh)); |
320 | return OSPF_GR_FAILURE; | |
321 | } | |
322 | ||
ad686992 | 323 | restart_addr = (struct grace_tlv_restart_addr *)tlvh; |
324 | addr->s_addr = restart_addr->addr.s_addr; | |
325 | sum += TLV_SIZE(tlvh); | |
326 | break; | |
327 | default: | |
3f87e1d8 | 328 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 329 | zlog_debug( |
330 | "%s, Malformed packet.Invalid TLV type:%d", | |
a4544597 | 331 | __func__, ntohs(tlvh->type)); |
ad686992 | 332 | return OSPF_GR_FAILURE; |
333 | } | |
334 | } | |
335 | ||
336 | return OSPF_GR_SUCCESS; | |
337 | } | |
338 | ||
339 | /* | |
340 | * Grace timer expiry handler. | |
341 | * HELPER aborts its role at grace timer expiry. | |
342 | * | |
343 | * thread | |
344 | * thread pointer | |
345 | * | |
346 | * Returns: | |
347 | * Nothing | |
348 | */ | |
cc9f21da | 349 | static void ospf_handle_grace_timer_expiry(struct thread *thread) |
ad686992 | 350 | { |
351 | struct ospf_neighbor *nbr = THREAD_ARG(thread); | |
352 | ||
353 | nbr->gr_helper_info.t_grace_timer = NULL; | |
354 | ||
355 | ospf_gr_helper_exit(nbr, OSPF_GR_HELPER_GRACE_TIMEOUT); | |
ad686992 | 356 | } |
357 | ||
358 | /* | |
359 | * Process Grace LSA.If it is eligible move to HELPER role. | |
360 | * Ref rfc3623 section 3.1 | |
361 | * | |
362 | * ospf | |
07b33add | 363 | * OSPF pointer. |
ad686992 | 364 | * |
365 | * lsa | |
366 | * Grace LSA received from RESTARTER. | |
367 | * | |
368 | * nbr | |
98cb53f9 | 369 | * OSPF neighbour which requests the router to act as |
ad686992 | 370 | * HELPER. |
371 | * | |
372 | * Returns: | |
373 | * status. | |
374 | * If supported as HELPER : OSPF_GR_HELPER_INPROGRESS | |
375 | * If Not supported as HELPER : OSPF_GR_HELPER_NONE | |
376 | */ | |
377 | int ospf_process_grace_lsa(struct ospf *ospf, struct ospf_lsa *lsa, | |
378 | struct ospf_neighbor *nbr) | |
379 | { | |
380 | struct in_addr restart_addr = {0}; | |
381 | uint8_t restart_reason = 0; | |
382 | uint32_t grace_interval = 0; | |
383 | uint32_t actual_grace_interval = 0; | |
384 | struct advRtr lookup; | |
385 | struct ospf_neighbor *restarter = NULL; | |
386 | struct ospf_interface *oi = nbr->oi; | |
387 | int ret; | |
388 | ||
389 | ||
390 | /* Extract the grace lsa packet fields */ | |
391 | ret = ospf_extract_grace_lsa_fields(lsa, &grace_interval, &restart_addr, | |
392 | &restart_reason); | |
393 | if (ret != OSPF_GR_SUCCESS) { | |
3f87e1d8 | 394 | if (IS_DEBUG_OSPF_GR) |
a4544597 | 395 | zlog_debug("%s, Wrong Grace LSA packet.", __func__); |
ad686992 | 396 | return OSPF_GR_NOT_HELPER; |
397 | } | |
398 | ||
3f87e1d8 | 399 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 400 | zlog_debug( |
98cb53f9 | 401 | "%s, Grace LSA received from %pI4, grace interval:%u, restart reason:%s", |
a4544597 | 402 | __func__, &restart_addr, grace_interval, |
d05d5280 | 403 | ospf_restart_reason2str(restart_reason)); |
ad686992 | 404 | |
98cb53f9 | 405 | /* In case of broadcast links, if RESTARTER is DR_OTHER, |
ad686992 | 406 | * grace LSA might be received from DR, so need to get |
407 | * actual neighbour info , here RESTARTER. | |
408 | */ | |
409 | if (oi->type != OSPF_IFTYPE_POINTOPOINT) { | |
410 | restarter = ospf_nbr_lookup_by_addr(oi->nbrs, &restart_addr); | |
411 | ||
412 | if (!restarter) { | |
3f87e1d8 | 413 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 414 | zlog_debug( |
96b663a3 | 415 | "%s, Restarter is not a nbr(%pI4) for this router.", |
a4544597 | 416 | __func__, &restart_addr); |
ad686992 | 417 | return OSPF_GR_NOT_HELPER; |
418 | } | |
419 | } else | |
420 | restarter = nbr; | |
421 | ||
422 | /* Verify Helper enabled globally */ | |
423 | if (!ospf->is_helper_supported) { | |
424 | /* Verify that Helper support is enabled for the | |
425 | * current neighbour router-id. | |
426 | */ | |
427 | lookup.advRtrAddr.s_addr = restarter->router_id.s_addr; | |
428 | ||
429 | if (!hash_lookup(ospf->enable_rtr_list, &lookup)) { | |
3f87e1d8 | 430 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 431 | zlog_debug( |
432 | "%s, HELPER support is disabled, So not a HELPER", | |
a4544597 | 433 | __func__); |
ad686992 | 434 | restarter->gr_helper_info.rejected_reason = |
435 | OSPF_HELPER_SUPPORT_DISABLED; | |
436 | return OSPF_GR_NOT_HELPER; | |
437 | } | |
438 | } | |
439 | ||
440 | ||
441 | /* Check neighbour is in FULL state and | |
442 | * became a adjacency. | |
443 | */ | |
444 | if (!IS_NBR_STATE_FULL(restarter)) { | |
3f87e1d8 | 445 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 446 | zlog_debug( |
96b663a3 | 447 | "%s, This Neighbour %pI4 is not in FULL state.", |
a4544597 | 448 | __func__, &restarter->src); |
ad686992 | 449 | restarter->gr_helper_info.rejected_reason = |
450 | OSPF_HELPER_NOT_A_VALID_NEIGHBOUR; | |
451 | return OSPF_GR_NOT_HELPER; | |
452 | } | |
453 | ||
454 | /* Based on the restart reason from grace lsa | |
455 | * check the current router is supporting or not | |
456 | */ | |
457 | if (ospf->only_planned_restart | |
458 | && !OSPF_GR_IS_PLANNED_RESTART(restart_reason)) { | |
3f87e1d8 | 459 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 460 | zlog_debug( |
461 | "%s, Router supports only planned restarts but received the GRACE LSA for an unplanned restart.", | |
a4544597 | 462 | __func__); |
ad686992 | 463 | restarter->gr_helper_info.rejected_reason = |
464 | OSPF_HELPER_PLANNED_ONLY_RESTART; | |
465 | return OSPF_GR_NOT_HELPER; | |
466 | } | |
467 | ||
98cb53f9 | 468 | /* Check the retransmission list of this |
ad686992 | 469 | * neighbour, check any change in lsas. |
470 | */ | |
471 | if (ospf->strict_lsa_check && !ospf_ls_retransmit_isempty(restarter) | |
472 | && ospf_check_change_in_rxmt_list(restarter)) { | |
3f87e1d8 | 473 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 474 | zlog_debug( |
475 | "%s, Changed LSA in Rxmt list. So not Helper.", | |
a4544597 | 476 | __func__); |
ad686992 | 477 | restarter->gr_helper_info.rejected_reason = |
478 | OSPF_HELPER_TOPO_CHANGE_RTXMT_LIST; | |
479 | return OSPF_GR_NOT_HELPER; | |
480 | } | |
481 | ||
482 | /*LSA age must be less than the grace period */ | |
483 | if (ntohs(lsa->data->ls_age) >= grace_interval) { | |
3f87e1d8 | 484 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 485 | zlog_debug( |
98cb53f9 | 486 | "%s, Grace LSA age(%d) is more than the grace interval(%d)", |
a4544597 | 487 | __func__, lsa->data->ls_age, grace_interval); |
ad686992 | 488 | restarter->gr_helper_info.rejected_reason = |
489 | OSPF_HELPER_LSA_AGE_MORE; | |
490 | return OSPF_GR_NOT_HELPER; | |
491 | } | |
492 | ||
10514170 RW |
493 | if (ospf->gr_info.restart_in_progress) { |
494 | if (IS_DEBUG_OSPF_GR) | |
495 | zlog_debug( | |
496 | "%s: router is in the process of graceful restart", | |
497 | __func__); | |
498 | restarter->gr_helper_info.rejected_reason = | |
499 | OSPF_HELPER_RESTARTING; | |
500 | return OSPF_GR_NOT_HELPER; | |
501 | } | |
502 | ||
ad686992 | 503 | /* check supported grace period configured |
504 | * if configured, use this to start the grace | |
505 | * timer otherwise use the interval received | |
506 | * in grace LSA packet. | |
507 | */ | |
508 | actual_grace_interval = grace_interval; | |
509 | if (grace_interval > ospf->supported_grace_time) { | |
3f87e1d8 | 510 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 511 | zlog_debug( |
512 | "%s, Received grace period %d is larger than supported grace %d", | |
a4544597 | 513 | __func__, grace_interval, |
ad686992 | 514 | ospf->supported_grace_time); |
515 | actual_grace_interval = ospf->supported_grace_time; | |
516 | } | |
517 | ||
518 | if (OSPF_GR_IS_ACTIVE_HELPER(restarter)) { | |
519 | if (restarter->gr_helper_info.t_grace_timer) | |
520 | THREAD_OFF(restarter->gr_helper_info.t_grace_timer); | |
521 | ||
522 | if (ospf->active_restarter_cnt > 0) | |
523 | ospf->active_restarter_cnt--; | |
524 | ||
3f87e1d8 | 525 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 526 | zlog_debug( |
527 | "%s, Router is already acting as a HELPER for this nbr,so restart the grace timer", | |
a4544597 | 528 | __func__); |
ad686992 | 529 | } else { |
3f87e1d8 | 530 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 531 | zlog_debug( |
96b663a3 | 532 | "%s, This Router becomes a HELPER for the neighbour %pI4", |
a4544597 | 533 | __func__, &restarter->src); |
ad686992 | 534 | } |
535 | ||
536 | /* Became a Helper to the RESTART neighbour. | |
537 | * Change the helper status. | |
538 | */ | |
539 | restarter->gr_helper_info.gr_helper_status = OSPF_GR_ACTIVE_HELPER; | |
540 | restarter->gr_helper_info.recvd_grace_period = grace_interval; | |
541 | restarter->gr_helper_info.actual_grace_period = actual_grace_interval; | |
542 | restarter->gr_helper_info.gr_restart_reason = restart_reason; | |
543 | restarter->gr_helper_info.rejected_reason = OSPF_HELPER_REJECTED_NONE; | |
544 | ||
98cb53f9 | 545 | /* Increment the active restarter count */ |
ad686992 | 546 | ospf->active_restarter_cnt++; |
547 | ||
3f87e1d8 | 548 | if (IS_DEBUG_OSPF_GR) |
a4544597 DS |
549 | zlog_debug("%s, Grace timer started.interval:%d", __func__, |
550 | actual_grace_interval); | |
ad686992 | 551 | |
552 | /* Start the grace timer */ | |
553 | thread_add_timer(master, ospf_handle_grace_timer_expiry, restarter, | |
554 | actual_grace_interval, | |
555 | &restarter->gr_helper_info.t_grace_timer); | |
556 | ||
557 | return OSPF_GR_ACTIVE_HELPER; | |
558 | } | |
559 | ||
560 | /* | |
561 | * API to check any change in the neighbor's | |
562 | * retransmission list. | |
563 | * | |
564 | * nbr | |
98cb53f9 | 565 | * OSPF neighbor |
ad686992 | 566 | * |
567 | * Returns: | |
568 | * TRUE - if any change in the lsa. | |
569 | * FALSE - no change in the lsas. | |
570 | */ | |
571 | static bool ospf_check_change_in_rxmt_list(struct ospf_neighbor *nbr) | |
572 | { | |
573 | struct route_node *rn; | |
574 | struct ospf_lsa *lsa; | |
575 | struct route_table *tbl; | |
576 | ||
577 | tbl = nbr->ls_rxmt.type[OSPF_ROUTER_LSA].db; | |
578 | LSDB_LOOP (tbl, rn, lsa) | |
579 | if (lsa->to_be_acknowledged) | |
580 | return OSPF_GR_TRUE; | |
581 | tbl = nbr->ls_rxmt.type[OSPF_NETWORK_LSA].db; | |
582 | LSDB_LOOP (tbl, rn, lsa) | |
583 | if (lsa->to_be_acknowledged) | |
584 | return OSPF_GR_TRUE; | |
585 | ||
586 | tbl = nbr->ls_rxmt.type[OSPF_SUMMARY_LSA].db; | |
587 | LSDB_LOOP (tbl, rn, lsa) | |
588 | if (lsa->to_be_acknowledged) | |
589 | return OSPF_GR_TRUE; | |
590 | ||
591 | tbl = nbr->ls_rxmt.type[OSPF_ASBR_SUMMARY_LSA].db; | |
592 | LSDB_LOOP (tbl, rn, lsa) | |
593 | if (lsa->to_be_acknowledged) | |
594 | return OSPF_GR_TRUE; | |
595 | ||
596 | tbl = nbr->ls_rxmt.type[OSPF_AS_EXTERNAL_LSA].db; | |
597 | LSDB_LOOP (tbl, rn, lsa) | |
598 | if (lsa->to_be_acknowledged) | |
599 | return OSPF_GR_TRUE; | |
600 | ||
601 | tbl = nbr->ls_rxmt.type[OSPF_AS_NSSA_LSA].db; | |
602 | LSDB_LOOP (tbl, rn, lsa) | |
603 | if (lsa->to_be_acknowledged) | |
604 | return OSPF_GR_TRUE; | |
605 | ||
606 | return OSPF_GR_FALSE; | |
607 | } | |
608 | ||
df074ec3 | 609 | /* |
610 | * Actions to be taken when topo change detected | |
611 | * HELPER will exit upon topo change. | |
612 | * | |
613 | * ospf | |
614 | * ospf pointer | |
615 | * lsa | |
98cb53f9 | 616 | * topo change occurred due to this lsa type (1 to 5 and 7) |
df074ec3 | 617 | * |
618 | * Returns: | |
619 | * Nothing | |
620 | */ | |
621 | void ospf_helper_handle_topo_chg(struct ospf *ospf, struct ospf_lsa *lsa) | |
622 | { | |
623 | struct listnode *node; | |
624 | struct ospf_interface *oi; | |
625 | ||
d8193748 | 626 | /* Topo change not required to be handled if strict |
98cb53f9 | 627 | * LSA check is disabled for this router. |
df074ec3 | 628 | */ |
629 | if (!ospf->strict_lsa_check) | |
630 | return; | |
631 | ||
3f87e1d8 | 632 | if (IS_DEBUG_OSPF_GR) |
e9505bc6 RW |
633 | zlog_debug("%s: Topo change detected due to LSA[%s]", __func__, |
634 | dump_lsa_key(lsa)); | |
df074ec3 | 635 | |
636 | lsa->to_be_acknowledged = OSPF_GR_TRUE; | |
637 | ||
638 | for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi)) { | |
639 | struct route_node *rn = NULL; | |
640 | ||
641 | if (ospf_interface_neighbor_count(oi) == 0) | |
642 | continue; | |
643 | ||
644 | /* Ref rfc3623 section 3.2.3.b | |
645 | * If change due to external LSA and if the area is | |
646 | * stub, then it is not a topo change. Since Type-5 | |
647 | * lsas will not be flooded in stub area. | |
648 | */ | |
649 | if ((oi->area->external_routing == OSPF_AREA_STUB) | |
650 | && (lsa->data->type == OSPF_AS_EXTERNAL_LSA)) { | |
651 | continue; | |
652 | } | |
653 | ||
654 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) { | |
655 | struct ospf_neighbor *nbr = NULL; | |
656 | ||
657 | if (!rn->info) | |
658 | continue; | |
659 | ||
660 | nbr = rn->info; | |
661 | ||
662 | if (OSPF_GR_IS_ACTIVE_HELPER(nbr)) | |
663 | ospf_gr_helper_exit(nbr, | |
664 | OSPF_GR_HELPER_TOPO_CHG); | |
665 | } | |
666 | } | |
667 | } | |
668 | ||
ad686992 | 669 | /* |
670 | * Api to exit from HELPER role to take all actions | |
671 | * required at exit. | |
672 | * Ref rfc3623 section 3.2 | |
673 | * | |
674 | * ospf | |
07b33add | 675 | * OSPF pointer. |
ad686992 | 676 | * |
677 | * nbr | |
07b33add | 678 | * OSPF neighbour for which it is acting as HELPER. |
ad686992 | 679 | * |
680 | * reason | |
681 | * The reason for exiting from HELPER. | |
682 | * | |
683 | * Returns: | |
684 | * Nothing. | |
685 | */ | |
686 | void ospf_gr_helper_exit(struct ospf_neighbor *nbr, | |
687 | enum ospf_helper_exit_reason reason) | |
688 | { | |
df074ec3 | 689 | struct ospf_interface *oi = nbr->oi; |
690 | struct ospf *ospf = oi->ospf; | |
691 | ||
692 | if (!OSPF_GR_IS_ACTIVE_HELPER(nbr)) | |
693 | return; | |
694 | ||
3f87e1d8 | 695 | if (IS_DEBUG_OSPF_GR) |
96b663a3 | 696 | zlog_debug("%s, Exiting from HELPER support to %pI4, due to %s", |
a4544597 | 697 | __func__, &nbr->src, ospf_exit_reason2str(reason)); |
df074ec3 | 698 | |
699 | /* Reset helper status*/ | |
700 | nbr->gr_helper_info.gr_helper_status = OSPF_GR_NOT_HELPER; | |
701 | nbr->gr_helper_info.helper_exit_reason = reason; | |
702 | nbr->gr_helper_info.actual_grace_period = 0; | |
703 | nbr->gr_helper_info.recvd_grace_period = 0; | |
704 | nbr->gr_helper_info.gr_restart_reason = 0; | |
705 | ospf->last_exit_reason = reason; | |
706 | ||
707 | if (ospf->active_restarter_cnt <= 0) { | |
708 | zlog_err( | |
709 | "OSPF GR-Helper: active_restarter_cnt should be greater than zero here."); | |
710 | return; | |
711 | } | |
712 | /* Decrement active Restarter count */ | |
713 | ospf->active_restarter_cnt--; | |
714 | ||
715 | /* If the exit not triggered due to grace timer | |
98cb53f9 | 716 | * expiry, stop the grace timer. |
df074ec3 | 717 | */ |
718 | if (reason != OSPF_GR_HELPER_GRACE_TIMEOUT) | |
719 | THREAD_OFF(nbr->gr_helper_info.t_grace_timer); | |
720 | ||
721 | /* check exit triggered due to successful completion | |
722 | * of graceful restart. | |
df074ec3 | 723 | */ |
724 | if (reason != OSPF_GR_HELPER_COMPLETED) { | |
3f87e1d8 | 725 | if (IS_DEBUG_OSPF_GR) |
89eb4727 | 726 | zlog_debug("%s, Unsuccessful GR exit", __func__); |
df074ec3 | 727 | } |
728 | ||
729 | /*Recalculate the DR for the network segment */ | |
802a5739 RW |
730 | if (oi->type == OSPF_IFTYPE_BROADCAST || oi->type == OSPF_IFTYPE_NBMA) |
731 | ospf_dr_election(oi); | |
df074ec3 | 732 | |
733 | /* Originate a router LSA */ | |
734 | ospf_router_lsa_update_area(oi->area); | |
735 | ||
736 | /* Originate network lsa if it is an DR in the LAN */ | |
737 | if (oi->state == ISM_DR) | |
738 | ospf_network_lsa_update(oi); | |
ad686992 | 739 | } |
740 | ||
741 | /* | |
98cb53f9 | 742 | * Process MaxAge Grace LSA. |
df074ec3 | 743 | * It is a indication for successful completion of GR. |
ad686992 | 744 | * If router acting as HELPER, It exits from helper role. |
745 | * | |
746 | * ospf | |
07b33add | 747 | * OSPF pointer. |
ad686992 | 748 | * |
749 | * lsa | |
750 | * Grace LSA received from RESTARTER. | |
751 | * | |
752 | * nbr | |
98cb53f9 | 753 | * OSPF neighbour which requests the router to act as |
ad686992 | 754 | * HELPER. |
755 | * | |
756 | * Returns: | |
757 | * Nothing. | |
758 | */ | |
759 | void ospf_process_maxage_grace_lsa(struct ospf *ospf, struct ospf_lsa *lsa, | |
760 | struct ospf_neighbor *nbr) | |
761 | { | |
df074ec3 | 762 | struct in_addr restartAddr = {0}; |
763 | uint8_t restartReason = 0; | |
764 | uint32_t graceInterval = 0; | |
765 | struct ospf_neighbor *restarter = NULL; | |
766 | struct ospf_interface *oi = nbr->oi; | |
767 | int ret; | |
768 | ||
769 | /* Extract the grace lsa packet fields */ | |
770 | ret = ospf_extract_grace_lsa_fields(lsa, &graceInterval, &restartAddr, | |
771 | &restartReason); | |
772 | if (ret != OSPF_GR_SUCCESS) { | |
3f87e1d8 | 773 | if (IS_DEBUG_OSPF_GR) |
a4544597 | 774 | zlog_debug("%s, Wrong Grace LSA packet.", __func__); |
df074ec3 | 775 | return; |
776 | } | |
777 | ||
3f87e1d8 | 778 | if (IS_DEBUG_OSPF_GR) |
a4544597 DS |
779 | zlog_debug("%s, GraceLSA received for neighbour %pI4", __func__, |
780 | &restartAddr); | |
df074ec3 | 781 | |
782 | /* In case of broadcast links, if RESTARTER is DR_OTHER, | |
783 | * grace LSA might be received from DR, so fetching the | |
784 | * actual neighbour information using restarter address. | |
785 | */ | |
786 | if (oi->type != OSPF_IFTYPE_POINTOPOINT) { | |
787 | restarter = ospf_nbr_lookup_by_addr(oi->nbrs, &restartAddr); | |
788 | ||
789 | if (!restarter) { | |
3f87e1d8 | 790 | if (IS_DEBUG_OSPF_GR) |
df074ec3 | 791 | zlog_debug( |
792 | "%s, Restarter is not a neighbour for this router.", | |
a4544597 | 793 | __func__); |
df074ec3 | 794 | return; |
795 | } | |
796 | } else { | |
797 | restarter = nbr; | |
798 | } | |
799 | ||
800 | ospf_gr_helper_exit(restarter, OSPF_GR_HELPER_COMPLETED); | |
ad686992 | 801 | } |
07b33add | 802 | |
803 | /* Configuration handlers */ | |
804 | /* | |
805 | * Disable/Enable HELPER support on router level. | |
806 | * | |
807 | * ospf | |
98cb53f9 | 808 | * OSPF pointer. |
07b33add | 809 | * |
810 | * status | |
811 | * TRUE/FALSE | |
812 | * | |
813 | * Returns: | |
814 | * Nothing. | |
815 | */ | |
816 | void ospf_gr_helper_support_set(struct ospf *ospf, bool support) | |
817 | { | |
818 | struct ospf_interface *oi; | |
819 | struct listnode *node; | |
820 | struct advRtr lookup; | |
821 | ||
822 | if (ospf->is_helper_supported == support) | |
823 | return; | |
824 | ||
825 | ospf->is_helper_supported = support; | |
826 | ||
827 | /* If helper support disabled, cease HELPER role for all | |
828 | * supporting neighbors. | |
829 | */ | |
830 | if (support == OSPF_GR_FALSE) { | |
831 | for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi)) { | |
832 | struct route_node *rn = NULL; | |
833 | ||
834 | if (ospf_interface_neighbor_count(oi) == 0) | |
835 | continue; | |
836 | ||
837 | for (rn = route_top(oi->nbrs); rn; | |
838 | rn = route_next(rn)) { | |
839 | struct ospf_neighbor *nbr = NULL; | |
840 | ||
841 | if (!rn->info) | |
842 | continue; | |
843 | ||
844 | nbr = rn->info; | |
845 | ||
846 | lookup.advRtrAddr.s_addr = | |
847 | nbr->router_id.s_addr; | |
848 | /* check if helper support enabled for the | |
1461559c DS |
849 | * corresponding routerid.If enabled, don't |
850 | * exit from helper role. | |
07b33add | 851 | */ |
852 | if (hash_lookup(ospf->enable_rtr_list, &lookup)) | |
853 | continue; | |
854 | ||
855 | if (OSPF_GR_IS_ACTIVE_HELPER(nbr)) | |
856 | ospf_gr_helper_exit( | |
857 | nbr, OSPF_GR_HELPER_TOPO_CHG); | |
858 | } | |
859 | } | |
860 | } | |
861 | } | |
862 | ||
863 | /* | |
864 | * Enable/Disable HELPER support on a specified advertagement | |
865 | * router. | |
866 | * | |
867 | * ospf | |
868 | * OSPF pointer. | |
869 | * | |
870 | * advRtr | |
871 | * HELPER support for given Advertisement Router. | |
872 | * | |
873 | * support | |
874 | * True - Enable Helper Support. | |
875 | * False - Disable Helper Support. | |
876 | * | |
877 | * Returns: | |
878 | * Nothing. | |
879 | */ | |
880 | ||
881 | void ospf_gr_helper_support_set_per_routerid(struct ospf *ospf, | |
882 | struct in_addr *advrtr, | |
883 | bool support) | |
884 | { | |
885 | struct advRtr temp; | |
886 | struct advRtr *rtr; | |
887 | struct ospf_interface *oi; | |
888 | struct listnode *node; | |
889 | ||
890 | temp.advRtrAddr.s_addr = advrtr->s_addr; | |
891 | ||
892 | if (support == OSPF_GR_FALSE) { | |
893 | /*Delete the routerid from the enable router hash table */ | |
894 | rtr = hash_lookup(ospf->enable_rtr_list, &temp); | |
895 | ||
896 | if (rtr) { | |
897 | hash_release(ospf->enable_rtr_list, rtr); | |
898 | ospf_disable_rtr_hash_free(rtr); | |
899 | } | |
900 | ||
901 | /* If helper support is enabled globally | |
902 | * no action is required. | |
903 | */ | |
904 | if (ospf->is_helper_supported) | |
905 | return; | |
906 | ||
907 | /* Cease the HELPER role fore neighbours from the | |
908 | * specified advertisement router. | |
909 | */ | |
910 | for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi)) { | |
911 | struct route_node *rn = NULL; | |
912 | ||
913 | if (ospf_interface_neighbor_count(oi) == 0) | |
914 | continue; | |
915 | ||
916 | for (rn = route_top(oi->nbrs); rn; | |
917 | rn = route_next(rn)) { | |
918 | struct ospf_neighbor *nbr = NULL; | |
919 | ||
920 | if (!rn->info) | |
921 | continue; | |
922 | ||
923 | nbr = rn->info; | |
924 | ||
925 | if (nbr->router_id.s_addr != advrtr->s_addr) | |
926 | continue; | |
927 | ||
928 | if (OSPF_GR_IS_ACTIVE_HELPER(nbr)) | |
929 | ospf_gr_helper_exit( | |
930 | nbr, OSPF_GR_HELPER_TOPO_CHG); | |
931 | } | |
932 | } | |
933 | ||
934 | } else { | |
935 | /* Add the routerid to the enable router hash table */ | |
936 | hash_get(ospf->enable_rtr_list, &temp, | |
937 | ospf_enable_rtr_hash_alloc); | |
938 | } | |
939 | } | |
940 | ||
941 | /* | |
942 | * Api to enable/disable strict lsa check on the HELPER. | |
943 | * | |
944 | * ospf | |
945 | * OSPF pointer. | |
946 | * | |
947 | * enabled | |
948 | * True - disable the lsa check. | |
949 | * False - enable the strict lsa check. | |
950 | * | |
951 | * Returns: | |
952 | * Nothing. | |
953 | */ | |
954 | void ospf_gr_helper_lsa_check_set(struct ospf *ospf, bool enabled) | |
955 | { | |
956 | if (ospf->strict_lsa_check == enabled) | |
957 | return; | |
958 | ||
959 | ospf->strict_lsa_check = enabled; | |
960 | } | |
961 | ||
962 | /* | |
963 | * Api to set the supported grace interval in this router. | |
964 | * | |
965 | * ospf | |
966 | * OSPF pointer. | |
967 | * | |
968 | * interval | |
969 | * The supported grace interval.. | |
970 | * | |
971 | * Returns: | |
972 | * Nothing. | |
973 | */ | |
974 | void ospf_gr_helper_supported_gracetime_set(struct ospf *ospf, | |
975 | uint32_t interval) | |
976 | { | |
977 | ospf->supported_grace_time = interval; | |
978 | } | |
979 | ||
980 | /* | |
981 | * Api to set the supported restart reason. | |
982 | * | |
983 | * ospf | |
984 | * OSPF pointer. | |
985 | * | |
986 | * planned_only | |
987 | * True: support only planned restart. | |
988 | * False: support for planned/unplanned restarts. | |
989 | * | |
990 | * Returns: | |
991 | * Nothing. | |
992 | */ | |
993 | void ospf_gr_helper_set_supported_planned_only_restart(struct ospf *ospf, | |
994 | bool planned_only) | |
995 | { | |
996 | ospf->only_planned_restart = planned_only; | |
997 | } | |
abd5b8c7 | 998 | |
999 | /* | |
1000 | * Api to display the grace LSA information. | |
1001 | * | |
1002 | * vty | |
1003 | * vty pointer. | |
1004 | * lsa | |
1005 | * Grace LSA. | |
1006 | * json | |
1007 | * json object | |
1008 | * | |
1009 | * Returns: | |
1010 | * Nothing. | |
1011 | */ | |
3e63092b RW |
1012 | static void show_ospf_grace_lsa_info(struct vty *vty, struct json_object *json, |
1013 | struct ospf_lsa *lsa) | |
abd5b8c7 | 1014 | { |
1015 | struct lsa_header *lsah = NULL; | |
1016 | struct tlv_header *tlvh = NULL; | |
1017 | struct grace_tlv_graceperiod *gracePeriod; | |
1018 | struct grace_tlv_restart_reason *grReason; | |
1019 | struct grace_tlv_restart_addr *restartAddr; | |
1020 | uint16_t length = 0; | |
1021 | int sum = 0; | |
1022 | ||
3e63092b RW |
1023 | if (json) |
1024 | return; | |
1025 | ||
abd5b8c7 | 1026 | lsah = (struct lsa_header *)lsa->data; |
1027 | ||
8db278b5 | 1028 | if (lsa->size <= OSPF_LSA_HEADER_SIZE) { |
f5f27b58 RW |
1029 | if (vty) |
1030 | vty_out(vty, "%% Invalid LSA length: %d\n", length); | |
1031 | else | |
1032 | zlog_debug("%% Invalid LSA length: %d", length); | |
d8193748 MS |
1033 | return; |
1034 | } | |
1035 | ||
8db278b5 | 1036 | length = lsa->size - OSPF_LSA_HEADER_SIZE; |
abd5b8c7 | 1037 | |
f5f27b58 RW |
1038 | if (vty) |
1039 | vty_out(vty, " TLV info:\n"); | |
1040 | else | |
1041 | zlog_debug(" TLV info:"); | |
abd5b8c7 | 1042 | |
8db278b5 | 1043 | for (tlvh = TLV_HDR_TOP(lsah); sum < length && tlvh; |
abd5b8c7 | 1044 | tlvh = TLV_HDR_NEXT(tlvh)) { |
d8193748 MS |
1045 | /* Check TLV len */ |
1046 | if (sum + TLV_SIZE(tlvh) > length) { | |
f5f27b58 RW |
1047 | if (vty) |
1048 | vty_out(vty, "%% Invalid TLV length: %u\n", | |
1049 | TLV_SIZE(tlvh)); | |
1050 | else | |
1051 | zlog_debug("%% Invalid TLV length: %u", | |
1052 | TLV_SIZE(tlvh)); | |
d8193748 MS |
1053 | return; |
1054 | } | |
1055 | ||
abd5b8c7 | 1056 | switch (ntohs(tlvh->type)) { |
1057 | case GRACE_PERIOD_TYPE: | |
f5f27b58 RW |
1058 | if (TLV_SIZE(tlvh) |
1059 | < sizeof(struct grace_tlv_graceperiod)) { | |
1060 | if (vty) | |
1061 | vty_out(vty, | |
1062 | "%% Invalid grace TLV length %u\n", | |
1063 | TLV_SIZE(tlvh)); | |
1064 | else | |
1065 | zlog_debug( | |
1066 | "%% Invalid grace TLV length %u", | |
1067 | TLV_SIZE(tlvh)); | |
d8193748 MS |
1068 | return; |
1069 | } | |
1070 | ||
abd5b8c7 | 1071 | gracePeriod = (struct grace_tlv_graceperiod *)tlvh; |
1072 | sum += TLV_SIZE(tlvh); | |
1073 | ||
f5f27b58 RW |
1074 | if (vty) |
1075 | vty_out(vty, " Grace period:%d\n", | |
1076 | ntohl(gracePeriod->interval)); | |
1077 | else | |
1078 | zlog_debug(" Grace period:%d", | |
1079 | ntohl(gracePeriod->interval)); | |
abd5b8c7 | 1080 | break; |
1081 | case RESTART_REASON_TYPE: | |
f5f27b58 RW |
1082 | if (TLV_SIZE(tlvh) |
1083 | < sizeof(struct grace_tlv_restart_reason)) { | |
1084 | if (vty) | |
1085 | vty_out(vty, | |
1086 | "%% Invalid reason TLV length %u\n", | |
1087 | TLV_SIZE(tlvh)); | |
1088 | else | |
1089 | zlog_debug( | |
1090 | "%% Invalid reason TLV length %u", | |
1091 | TLV_SIZE(tlvh)); | |
d8193748 MS |
1092 | return; |
1093 | } | |
1094 | ||
abd5b8c7 | 1095 | grReason = (struct grace_tlv_restart_reason *)tlvh; |
1096 | sum += TLV_SIZE(tlvh); | |
1097 | ||
f5f27b58 RW |
1098 | if (vty) |
1099 | vty_out(vty, " Restart reason:%s\n", | |
1100 | ospf_restart_reason2str( | |
1101 | grReason->reason)); | |
1102 | else | |
1103 | zlog_debug(" Restart reason:%s", | |
1104 | ospf_restart_reason2str( | |
1105 | grReason->reason)); | |
abd5b8c7 | 1106 | break; |
1107 | case RESTARTER_IP_ADDR_TYPE: | |
f5f27b58 RW |
1108 | if (TLV_SIZE(tlvh) |
1109 | < sizeof(struct grace_tlv_restart_addr)) { | |
1110 | if (vty) | |
1111 | vty_out(vty, | |
1112 | "%% Invalid addr TLV length %u\n", | |
1113 | TLV_SIZE(tlvh)); | |
1114 | else | |
1115 | zlog_debug( | |
1116 | "%% Invalid addr TLV length %u", | |
1117 | TLV_SIZE(tlvh)); | |
d8193748 MS |
1118 | return; |
1119 | } | |
1120 | ||
abd5b8c7 | 1121 | restartAddr = (struct grace_tlv_restart_addr *)tlvh; |
1122 | sum += TLV_SIZE(tlvh); | |
1123 | ||
f5f27b58 RW |
1124 | if (vty) |
1125 | vty_out(vty, " Restarter address:%pI4\n", | |
1126 | &restartAddr->addr); | |
1127 | else | |
1128 | zlog_debug(" Restarter address:%pI4", | |
1129 | &restartAddr->addr); | |
abd5b8c7 | 1130 | break; |
1131 | default: | |
f5f27b58 RW |
1132 | if (vty) |
1133 | vty_out(vty, " Unknown TLV type %d\n", | |
1134 | ntohs(tlvh->type)); | |
1135 | else | |
1136 | zlog_debug(" Unknown TLV type %d", | |
1137 | ntohs(tlvh->type)); | |
d8193748 | 1138 | |
abd5b8c7 | 1139 | break; |
1140 | } | |
1141 | } | |
1142 | } |