]>
Commit | Line | Data |
---|---|---|
718e3744 | 1 | /* |
2 | * OSPF Link State Advertisement | |
3 | * Copyright (C) 1999, 2000 Toshiaki Takada | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "linklist.h" | |
26 | #include "prefix.h" | |
27 | #include "if.h" | |
28 | #include "table.h" | |
29 | #include "memory.h" | |
30 | #include "stream.h" | |
31 | #include "log.h" | |
32 | #include "thread.h" | |
33 | #include "hash.h" | |
34 | #include "sockunion.h" /* for inet_aton() */ | |
6a270cd9 | 35 | #include "checksum.h" |
718e3744 | 36 | |
37 | #include "ospfd/ospfd.h" | |
38 | #include "ospfd/ospf_interface.h" | |
39 | #include "ospfd/ospf_ism.h" | |
40 | #include "ospfd/ospf_asbr.h" | |
41 | #include "ospfd/ospf_lsa.h" | |
42 | #include "ospfd/ospf_lsdb.h" | |
43 | #include "ospfd/ospf_neighbor.h" | |
44 | #include "ospfd/ospf_nsm.h" | |
45 | #include "ospfd/ospf_flood.h" | |
46 | #include "ospfd/ospf_packet.h" | |
47 | #include "ospfd/ospf_spf.h" | |
48 | #include "ospfd/ospf_dump.h" | |
49 | #include "ospfd/ospf_route.h" | |
50 | #include "ospfd/ospf_ase.h" | |
51 | #include "ospfd/ospf_zebra.h" | |
52 | ||
6b0655a2 | 53 | |
718e3744 | 54 | u_int32_t |
55 | get_metric (u_char *metric) | |
56 | { | |
57 | u_int32_t m; | |
58 | m = metric[0]; | |
59 | m = (m << 8) + metric[1]; | |
60 | m = (m << 8) + metric[2]; | |
61 | return m; | |
62 | } | |
63 | ||
6b0655a2 | 64 | |
718e3744 | 65 | struct timeval |
66 | tv_adjust (struct timeval a) | |
67 | { | |
68 | while (a.tv_usec >= 1000000) | |
69 | { | |
70 | a.tv_usec -= 1000000; | |
71 | a.tv_sec++; | |
72 | } | |
73 | ||
74 | while (a.tv_usec < 0) | |
75 | { | |
76 | a.tv_usec += 1000000; | |
77 | a.tv_sec--; | |
78 | } | |
79 | ||
80 | return a; | |
81 | } | |
82 | ||
83 | int | |
84 | tv_ceil (struct timeval a) | |
85 | { | |
86 | a = tv_adjust (a); | |
87 | ||
88 | return (a.tv_usec ? a.tv_sec + 1 : a.tv_sec); | |
89 | } | |
90 | ||
91 | int | |
92 | tv_floor (struct timeval a) | |
93 | { | |
94 | a = tv_adjust (a); | |
95 | ||
96 | return a.tv_sec; | |
97 | } | |
98 | ||
b6927875 DS |
99 | struct timeval |
100 | intms2tv (int a) | |
101 | { | |
102 | struct timeval ret; | |
103 | ||
104 | ret.tv_sec = a/1000; | |
105 | ret.tv_usec = (a%1000)*1000; | |
106 | ||
107 | return ret; | |
108 | } | |
109 | ||
718e3744 | 110 | struct timeval |
111 | int2tv (int a) | |
112 | { | |
113 | struct timeval ret; | |
114 | ||
115 | ret.tv_sec = a; | |
116 | ret.tv_usec = 0; | |
117 | ||
118 | return ret; | |
119 | } | |
120 | ||
121 | struct timeval | |
122 | tv_add (struct timeval a, struct timeval b) | |
123 | { | |
124 | struct timeval ret; | |
125 | ||
126 | ret.tv_sec = a.tv_sec + b.tv_sec; | |
127 | ret.tv_usec = a.tv_usec + b.tv_usec; | |
128 | ||
129 | return tv_adjust (ret); | |
130 | } | |
131 | ||
132 | struct timeval | |
133 | tv_sub (struct timeval a, struct timeval b) | |
134 | { | |
135 | struct timeval ret; | |
136 | ||
137 | ret.tv_sec = a.tv_sec - b.tv_sec; | |
138 | ret.tv_usec = a.tv_usec - b.tv_usec; | |
139 | ||
140 | return tv_adjust (ret); | |
141 | } | |
142 | ||
143 | int | |
144 | tv_cmp (struct timeval a, struct timeval b) | |
145 | { | |
146 | return (a.tv_sec == b.tv_sec ? | |
147 | a.tv_usec - b.tv_usec : a.tv_sec - b.tv_sec); | |
148 | } | |
149 | ||
150 | int | |
151 | ospf_lsa_refresh_delay (struct ospf_lsa *lsa) | |
152 | { | |
153 | struct timeval delta, now; | |
154 | int delay = 0; | |
155 | ||
2518efd1 | 156 | quagga_gettime (QUAGGA_CLK_MONOTONIC, &now); |
718e3744 | 157 | delta = tv_sub (now, lsa->tv_orig); |
158 | ||
ac7424f9 | 159 | if (tv_cmp (delta, intms2tv (OSPF_MIN_LS_INTERVAL)) < 0) |
718e3744 | 160 | { |
ac7424f9 | 161 | delay = tv_ceil (tv_sub (intms2tv (OSPF_MIN_LS_INTERVAL), delta)); |
718e3744 | 162 | |
163 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 164 | zlog_debug ("LSA[Type%d:%s]: Refresh timer delay %d seconds", |
718e3744 | 165 | lsa->data->type, inet_ntoa (lsa->data->id), delay); |
166 | ||
167 | assert (delay > 0); | |
168 | } | |
169 | ||
170 | return delay; | |
171 | } | |
172 | ||
6b0655a2 | 173 | |
718e3744 | 174 | int |
175 | get_age (struct ospf_lsa *lsa) | |
176 | { | |
177 | int age; | |
718e3744 | 178 | |
2518efd1 PJ |
179 | age = ntohs (lsa->data->ls_age) |
180 | + tv_floor (tv_sub (recent_relative_time (), lsa->tv_recv)); | |
718e3744 | 181 | |
182 | return age; | |
183 | } | |
184 | ||
6b0655a2 | 185 | |
718e3744 | 186 | /* Fletcher Checksum -- Refer to RFC1008. */ |
718e3744 | 187 | |
6a270cd9 JD |
188 | /* All the offsets are zero-based. The offsets in the RFC1008 are |
189 | one-based. */ | |
718e3744 | 190 | u_int16_t |
191 | ospf_lsa_checksum (struct lsa_header *lsa) | |
192 | { | |
6a270cd9 JD |
193 | u_char *buffer = (u_char *) &lsa->options; |
194 | int options_offset = buffer - (u_char *) &lsa->ls_age; /* should be 2 */ | |
718e3744 | 195 | |
6a270cd9 JD |
196 | /* Skip the AGE field */ |
197 | u_int16_t len = ntohs(lsa->length) - options_offset; | |
718e3744 | 198 | |
6a270cd9 JD |
199 | /* Checksum offset starts from "options" field, not the beginning of the |
200 | lsa_header struct. The offset is 14, rather than 16. */ | |
201 | int checksum_offset = (u_char *) &lsa->checksum - buffer; | |
718e3744 | 202 | |
6a270cd9 | 203 | return fletcher_checksum(buffer, len, checksum_offset); |
718e3744 | 204 | } |
205 | ||
d8a4e42b JR |
206 | int |
207 | ospf_lsa_checksum_valid (struct lsa_header *lsa) | |
208 | { | |
209 | u_char *buffer = (u_char *) &lsa->options; | |
210 | int options_offset = buffer - (u_char *) &lsa->ls_age; /* should be 2 */ | |
211 | ||
212 | /* Skip the AGE field */ | |
213 | u_int16_t len = ntohs(lsa->length) - options_offset; | |
214 | ||
215 | return(fletcher_checksum(buffer, len, FLETCHER_CHECKSUM_VALIDATE) == 0); | |
216 | } | |
217 | ||
718e3744 | 218 | |
6b0655a2 | 219 | |
718e3744 | 220 | /* Create OSPF LSA. */ |
221 | struct ospf_lsa * | |
222 | ospf_lsa_new () | |
223 | { | |
224 | struct ospf_lsa *new; | |
225 | ||
226 | new = XCALLOC (MTYPE_OSPF_LSA, sizeof (struct ospf_lsa)); | |
718e3744 | 227 | |
228 | new->flags = 0; | |
229 | new->lock = 1; | |
230 | new->retransmit_counter = 0; | |
2518efd1 | 231 | new->tv_recv = recent_relative_time (); |
718e3744 | 232 | new->tv_orig = new->tv_recv; |
233 | new->refresh_list = -1; | |
234 | ||
235 | return new; | |
236 | } | |
237 | ||
238 | /* Duplicate OSPF LSA. */ | |
239 | struct ospf_lsa * | |
240 | ospf_lsa_dup (struct ospf_lsa *lsa) | |
241 | { | |
242 | struct ospf_lsa *new; | |
243 | ||
244 | if (lsa == NULL) | |
245 | return NULL; | |
246 | ||
247 | new = XCALLOC (MTYPE_OSPF_LSA, sizeof (struct ospf_lsa)); | |
248 | ||
249 | memcpy (new, lsa, sizeof (struct ospf_lsa)); | |
250 | UNSET_FLAG (new->flags, OSPF_LSA_DISCARD); | |
251 | new->lock = 1; | |
252 | new->retransmit_counter = 0; | |
253 | new->data = ospf_lsa_data_dup (lsa->data); | |
254 | ||
f2c80652 | 255 | /* kevinm: Clear the refresh_list, otherwise there are going |
256 | to be problems when we try to remove the LSA from the | |
257 | queue (which it's not a member of.) | |
258 | XXX: Should we add the LSA to the refresh_list queue? */ | |
259 | new->refresh_list = -1; | |
260 | ||
261 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 262 | zlog_debug ("LSA: duplicated %p (new: %p)", lsa, new); |
f2c80652 | 263 | |
718e3744 | 264 | return new; |
265 | } | |
266 | ||
267 | /* Free OSPF LSA. */ | |
268 | void | |
269 | ospf_lsa_free (struct ospf_lsa *lsa) | |
270 | { | |
271 | assert (lsa->lock == 0); | |
272 | ||
273 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 274 | zlog_debug ("LSA: freed %p", lsa); |
718e3744 | 275 | |
276 | /* Delete LSA data. */ | |
277 | if (lsa->data != NULL) | |
278 | ospf_lsa_data_free (lsa->data); | |
279 | ||
280 | assert (lsa->refresh_list < 0); | |
281 | ||
282 | memset (lsa, 0, sizeof (struct ospf_lsa)); | |
283 | XFREE (MTYPE_OSPF_LSA, lsa); | |
284 | } | |
285 | ||
286 | /* Lock LSA. */ | |
287 | struct ospf_lsa * | |
288 | ospf_lsa_lock (struct ospf_lsa *lsa) | |
289 | { | |
290 | lsa->lock++; | |
291 | return lsa; | |
292 | } | |
293 | ||
294 | /* Unlock LSA. */ | |
295 | void | |
1fe6ed38 | 296 | ospf_lsa_unlock (struct ospf_lsa **lsa) |
718e3744 | 297 | { |
298 | /* This is sanity check. */ | |
1fe6ed38 | 299 | if (!lsa || !*lsa) |
718e3744 | 300 | return; |
301 | ||
1fe6ed38 | 302 | (*lsa)->lock--; |
718e3744 | 303 | |
1fe6ed38 | 304 | assert ((*lsa)->lock >= 0); |
718e3744 | 305 | |
1fe6ed38 | 306 | if ((*lsa)->lock == 0) |
718e3744 | 307 | { |
1fe6ed38 PJ |
308 | assert (CHECK_FLAG ((*lsa)->flags, OSPF_LSA_DISCARD)); |
309 | ospf_lsa_free (*lsa); | |
310 | *lsa = NULL; | |
718e3744 | 311 | } |
312 | } | |
313 | ||
314 | /* Check discard flag. */ | |
315 | void | |
316 | ospf_lsa_discard (struct ospf_lsa *lsa) | |
317 | { | |
318 | if (!CHECK_FLAG (lsa->flags, OSPF_LSA_DISCARD)) | |
319 | { | |
320 | SET_FLAG (lsa->flags, OSPF_LSA_DISCARD); | |
1fe6ed38 | 321 | ospf_lsa_unlock (&lsa); |
718e3744 | 322 | } |
323 | } | |
324 | ||
325 | /* Create LSA data. */ | |
326 | struct lsa_header * | |
327 | ospf_lsa_data_new (size_t size) | |
328 | { | |
393deb9b | 329 | return XCALLOC (MTYPE_OSPF_LSA_DATA, size); |
718e3744 | 330 | } |
331 | ||
332 | /* Duplicate LSA data. */ | |
333 | struct lsa_header * | |
334 | ospf_lsa_data_dup (struct lsa_header *lsah) | |
335 | { | |
336 | struct lsa_header *new; | |
337 | ||
338 | new = ospf_lsa_data_new (ntohs (lsah->length)); | |
339 | memcpy (new, lsah, ntohs (lsah->length)); | |
340 | ||
341 | return new; | |
342 | } | |
343 | ||
344 | /* Free LSA data. */ | |
345 | void | |
346 | ospf_lsa_data_free (struct lsa_header *lsah) | |
347 | { | |
348 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 349 | zlog_debug ("LSA[Type%d:%s]: data freed %p", |
718e3744 | 350 | lsah->type, inet_ntoa (lsah->id), lsah); |
351 | ||
352 | XFREE (MTYPE_OSPF_LSA_DATA, lsah); | |
353 | } | |
354 | ||
6b0655a2 | 355 | |
718e3744 | 356 | /* LSA general functions. */ |
357 | ||
358 | const char * | |
359 | dump_lsa_key (struct ospf_lsa *lsa) | |
360 | { | |
361 | static char buf[] = { | |
52dc7ee6 | 362 | "Type255,id(255.255.255.255),ar(255.255.255.255)" |
718e3744 | 363 | }; |
364 | struct lsa_header *lsah; | |
365 | ||
366 | if (lsa != NULL && (lsah = lsa->data) != NULL) | |
367 | { | |
368 | char id[INET_ADDRSTRLEN], ar[INET_ADDRSTRLEN]; | |
369 | strcpy (id, inet_ntoa (lsah->id)); | |
370 | strcpy (ar, inet_ntoa (lsah->adv_router)); | |
371 | ||
372 | sprintf (buf, "Type%d,id(%s),ar(%s)", lsah->type, id, ar); | |
373 | } | |
374 | else | |
375 | strcpy (buf, "NULL"); | |
376 | ||
377 | return buf; | |
378 | } | |
379 | ||
380 | u_int32_t | |
381 | lsa_seqnum_increment (struct ospf_lsa *lsa) | |
382 | { | |
383 | u_int32_t seqnum; | |
384 | ||
385 | seqnum = ntohl (lsa->data->ls_seqnum) + 1; | |
386 | ||
387 | return htonl (seqnum); | |
388 | } | |
389 | ||
390 | void | |
391 | lsa_header_set (struct stream *s, u_char options, | |
68980084 | 392 | u_char type, struct in_addr id, struct in_addr router_id) |
718e3744 | 393 | { |
394 | struct lsa_header *lsah; | |
395 | ||
396 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
397 | ||
02d942c9 | 398 | lsah->ls_age = htons (OSPF_LSA_INITIAL_AGE); |
718e3744 | 399 | lsah->options = options; |
400 | lsah->type = type; | |
401 | lsah->id = id; | |
68980084 | 402 | lsah->adv_router = router_id; |
718e3744 | 403 | lsah->ls_seqnum = htonl (OSPF_INITIAL_SEQUENCE_NUMBER); |
404 | ||
9985f83c | 405 | stream_forward_endp (s, OSPF_LSA_HEADER_SIZE); |
718e3744 | 406 | } |
6b0655a2 | 407 | |
68980084 | 408 | |
718e3744 | 409 | /* router-LSA related functions. */ |
410 | /* Get router-LSA flags. */ | |
4dadc291 | 411 | static u_char |
718e3744 | 412 | router_lsa_flags (struct ospf_area *area) |
413 | { | |
414 | u_char flags; | |
415 | ||
68980084 | 416 | flags = area->ospf->flags; |
718e3744 | 417 | |
418 | /* Set virtual link flag. */ | |
419 | if (ospf_full_virtual_nbrs (area)) | |
420 | SET_FLAG (flags, ROUTER_LSA_VIRTUAL); | |
421 | else | |
422 | /* Just sanity check */ | |
423 | UNSET_FLAG (flags, ROUTER_LSA_VIRTUAL); | |
424 | ||
425 | /* Set Shortcut ABR behabiour flag. */ | |
426 | UNSET_FLAG (flags, ROUTER_LSA_SHORTCUT); | |
68980084 | 427 | if (area->ospf->abr_type == OSPF_ABR_SHORTCUT) |
718e3744 | 428 | if (!OSPF_IS_AREA_BACKBONE (area)) |
429 | if ((area->shortcut_configured == OSPF_SHORTCUT_DEFAULT && | |
68980084 | 430 | area->ospf->backbone == NULL) || |
718e3744 | 431 | area->shortcut_configured == OSPF_SHORTCUT_ENABLE) |
432 | SET_FLAG (flags, ROUTER_LSA_SHORTCUT); | |
433 | ||
434 | /* ASBR can't exit in stub area. */ | |
fc787e87 | 435 | if (area->external_routing == OSPF_AREA_STUB) |
942b6c19 | 436 | UNSET_FLAG (flags, ROUTER_LSA_EXTERNAL); |
437 | /* If ASBR set External flag */ | |
438 | else if (IS_OSPF_ASBR (area->ospf)) | |
439 | SET_FLAG (flags, ROUTER_LSA_EXTERNAL); | |
440 | ||
441 | /* Set ABR dependent flags */ | |
442 | if (IS_OSPF_ABR (area->ospf)) | |
443 | { | |
444 | SET_FLAG (flags, ROUTER_LSA_BORDER); | |
942b6c19 | 445 | /* If Area is NSSA and we are both ABR and unconditional translator, |
d4a53d58 | 446 | * set Nt bit to inform other routers. |
942b6c19 | 447 | */ |
d4a53d58 | 448 | if ( (area->external_routing == OSPF_AREA_NSSA) |
449 | && (area->NSSATranslatorRole == OSPF_NSSA_ROLE_ALWAYS)) | |
450 | SET_FLAG (flags, ROUTER_LSA_NT); | |
942b6c19 | 451 | } |
718e3744 | 452 | return flags; |
453 | } | |
454 | ||
455 | /* Lookup neighbor other than myself. | |
456 | And check neighbor count, | |
457 | Point-to-Point link must have only 1 neighbor. */ | |
458 | struct ospf_neighbor * | |
68980084 | 459 | ospf_nbr_lookup_ptop (struct ospf_interface *oi) |
718e3744 | 460 | { |
718e3744 | 461 | struct ospf_neighbor *nbr = NULL; |
68980084 | 462 | struct route_node *rn; |
718e3744 | 463 | |
464 | /* Search neighbor, there must be one of two nbrs. */ | |
68980084 | 465 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) |
466 | if ((nbr = rn->info)) | |
467 | if (!IPV4_ADDR_SAME (&nbr->router_id, &oi->ospf->router_id)) | |
718e3744 | 468 | if (nbr->state == NSM_Full) |
68980084 | 469 | { |
470 | route_unlock_node (rn); | |
471 | break; | |
472 | } | |
718e3744 | 473 | |
474 | /* PtoP link must have only 1 neighbor. */ | |
68980084 | 475 | if (ospf_nbr_count (oi, 0) > 1) |
718e3744 | 476 | zlog_warn ("Point-to-Point link has more than 1 neighobrs."); |
477 | ||
478 | return nbr; | |
479 | } | |
480 | ||
88d6cf37 | 481 | /* Determine cost of link, taking RFC3137 stub-router support into |
482 | * consideration | |
483 | */ | |
484 | static u_int16_t | |
485 | ospf_link_cost (struct ospf_interface *oi) | |
486 | { | |
487 | /* RFC3137 stub router support */ | |
488 | if (!CHECK_FLAG (oi->area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED)) | |
489 | return oi->output_cost; | |
490 | else | |
491 | return OSPF_OUTPUT_COST_INFINITE; | |
492 | } | |
493 | ||
718e3744 | 494 | /* Set a link information. */ |
779adb01 | 495 | static char |
718e3744 | 496 | link_info_set (struct stream *s, struct in_addr id, |
497 | struct in_addr data, u_char type, u_char tos, u_int16_t cost) | |
498 | { | |
779adb01 | 499 | /* LSA stream is initially allocated to OSPF_MAX_LSA_SIZE, suits |
500 | * vast majority of cases. Some rare routers with lots of links need more. | |
501 | * we try accomodate those here. | |
502 | */ | |
503 | if (STREAM_WRITEABLE(s) < OSPF_ROUTER_LSA_LINK_SIZE) | |
504 | { | |
505 | size_t ret = OSPF_MAX_LSA_SIZE; | |
506 | ||
507 | /* Can we enlarge the stream still? */ | |
508 | if (STREAM_SIZE(s) == OSPF_MAX_LSA_SIZE) | |
509 | { | |
510 | /* we futz the size here for simplicity, really we need to account | |
511 | * for just: | |
512 | * IP Header - (sizeof (struct ip)) | |
513 | * OSPF Header - OSPF_HEADER_SIZE | |
514 | * LSA Header - OSPF_LSA_HEADER_SIZE | |
515 | * MD5 auth data, if MD5 is configured - OSPF_AUTH_MD5_SIZE. | |
516 | * | |
517 | * Simpler just to subtract OSPF_MAX_LSA_SIZE though. | |
518 | */ | |
519 | ret = stream_resize (s, OSPF_MAX_PACKET_SIZE - OSPF_MAX_LSA_SIZE); | |
520 | } | |
521 | ||
522 | if (ret == OSPF_MAX_LSA_SIZE) | |
523 | { | |
5372510d | 524 | zlog_warn ("%s: Out of space in LSA stream, left %zd, size %zd", |
779adb01 | 525 | __func__, STREAM_REMAIN (s), STREAM_SIZE (s)); |
526 | return 0; | |
527 | } | |
528 | } | |
529 | ||
718e3744 | 530 | /* TOS based routing is not supported. */ |
531 | stream_put_ipv4 (s, id.s_addr); /* Link ID. */ | |
532 | stream_put_ipv4 (s, data.s_addr); /* Link Data. */ | |
533 | stream_putc (s, type); /* Link Type. */ | |
534 | stream_putc (s, tos); /* TOS = 0. */ | |
535 | stream_putw (s, cost); /* Link Cost. */ | |
779adb01 | 536 | |
537 | return 1; | |
718e3744 | 538 | } |
539 | ||
e4529636 | 540 | /* Describe Point-to-Point link (Section 12.4.1.1). */ |
4dadc291 | 541 | static int |
718e3744 | 542 | lsa_link_ptop_set (struct stream *s, struct ospf_interface *oi) |
543 | { | |
544 | int links = 0; | |
545 | struct ospf_neighbor *nbr; | |
525c1839 | 546 | struct in_addr id, mask, data; |
88d6cf37 | 547 | u_int16_t cost = ospf_link_cost (oi); |
718e3744 | 548 | |
549 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 550 | zlog_debug ("LSA[Type1]: Set link Point-to-Point"); |
718e3744 | 551 | |
68980084 | 552 | if ((nbr = ospf_nbr_lookup_ptop (oi))) |
718e3744 | 553 | if (nbr->state == NSM_Full) |
554 | { | |
525c1839 DS |
555 | if (CHECK_FLAG(oi->connected->flags, ZEBRA_IFA_UNNUMBERED)) |
556 | { | |
557 | /* For unnumbered point-to-point networks, the Link Data field | |
558 | should specify the interface's MIB-II ifIndex value. */ | |
559 | data.s_addr = htonl(oi->ifp->ifindex); | |
560 | links += link_info_set (s, nbr->router_id, data, | |
561 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
562 | } | |
563 | else | |
564 | { | |
565 | links += link_info_set (s, nbr->router_id, | |
566 | oi->address->u.prefix4, | |
567 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
568 | } | |
718e3744 | 569 | } |
570 | ||
525c1839 DS |
571 | /* no need for a stub link for unnumbered interfaces */ |
572 | if (!CHECK_FLAG(oi->connected->flags, ZEBRA_IFA_UNNUMBERED)) | |
573 | { | |
574 | /* Regardless of the state of the neighboring router, we must | |
575 | add a Type 3 link (stub network). | |
576 | N.B. Options 1 & 2 share basically the same logic. */ | |
577 | masklen2ip (oi->address->prefixlen, &mask); | |
578 | id.s_addr = CONNECTED_PREFIX(oi->connected)->u.prefix4.s_addr & mask.s_addr; | |
579 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, | |
580 | oi->output_cost); | |
581 | } | |
582 | ||
718e3744 | 583 | return links; |
584 | } | |
585 | ||
586 | /* Describe Broadcast Link. */ | |
4dadc291 | 587 | static int |
718e3744 | 588 | lsa_link_broadcast_set (struct stream *s, struct ospf_interface *oi) |
589 | { | |
590 | struct ospf_neighbor *dr; | |
591 | struct in_addr id, mask; | |
88d6cf37 | 592 | u_int16_t cost = ospf_link_cost (oi); |
593 | ||
718e3744 | 594 | /* Describe Type 3 Link. */ |
595 | if (oi->state == ISM_Waiting) | |
596 | { | |
cbf435cb CF |
597 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
598 | zlog_debug ("LSA[Type1]: Interface %s is in state Waiting. " | |
599 | "Adding stub interface", oi->ifp->name); | |
718e3744 | 600 | masklen2ip (oi->address->prefixlen, &mask); |
601 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 602 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
603 | oi->output_cost); | |
718e3744 | 604 | } |
605 | ||
606 | dr = ospf_nbr_lookup_by_addr (oi->nbrs, &DR (oi)); | |
607 | /* Describe Type 2 link. */ | |
608 | if (dr && (dr->state == NSM_Full || | |
609 | IPV4_ADDR_SAME (&oi->address->u.prefix4, &DR (oi))) && | |
68980084 | 610 | ospf_nbr_count (oi, NSM_Full) > 0) |
718e3744 | 611 | { |
cbf435cb CF |
612 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
613 | zlog_debug ("LSA[Type1]: Interface %s has a DR. " | |
614 | "Adding transit interface", oi->ifp->name); | |
779adb01 | 615 | return link_info_set (s, DR (oi), oi->address->u.prefix4, |
616 | LSA_LINK_TYPE_TRANSIT, 0, cost); | |
718e3744 | 617 | } |
618 | /* Describe type 3 link. */ | |
619 | else | |
620 | { | |
cbf435cb CF |
621 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
622 | zlog_debug ("LSA[Type1]: Interface %s has no DR. " | |
623 | "Adding stub interface", oi->ifp->name); | |
718e3744 | 624 | masklen2ip (oi->address->prefixlen, &mask); |
625 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 626 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
627 | oi->output_cost); | |
718e3744 | 628 | } |
718e3744 | 629 | } |
630 | ||
4dadc291 | 631 | static int |
718e3744 | 632 | lsa_link_loopback_set (struct stream *s, struct ospf_interface *oi) |
633 | { | |
634 | struct in_addr id, mask; | |
88d6cf37 | 635 | |
718e3744 | 636 | /* Describe Type 3 Link. */ |
637 | if (oi->state != ISM_Loopback) | |
638 | return 0; | |
639 | ||
640 | mask.s_addr = 0xffffffff; | |
641 | id.s_addr = oi->address->u.prefix4.s_addr; | |
a1a5410e | 642 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); |
718e3744 | 643 | } |
644 | ||
645 | /* Describe Virtual Link. */ | |
4dadc291 | 646 | static int |
718e3744 | 647 | lsa_link_virtuallink_set (struct stream *s, struct ospf_interface *oi) |
648 | { | |
649 | struct ospf_neighbor *nbr; | |
88d6cf37 | 650 | u_int16_t cost = ospf_link_cost (oi); |
718e3744 | 651 | |
718e3744 | 652 | if (oi->state == ISM_PointToPoint) |
68980084 | 653 | if ((nbr = ospf_nbr_lookup_ptop (oi))) |
718e3744 | 654 | if (nbr->state == NSM_Full) |
655 | { | |
779adb01 | 656 | return link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
657 | LSA_LINK_TYPE_VIRTUALLINK, 0, cost); | |
718e3744 | 658 | } |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
663 | #define lsa_link_nbma_set(S,O) lsa_link_broadcast_set (S, O) | |
664 | ||
7afa08da | 665 | /* this function add for support point-to-multipoint ,see rfc2328 |
666 | 12.4.1.4.*/ | |
667 | /* from "edward rrr" <edward_rrr@hotmail.com> | |
668 | http://marc.theaimsgroup.com/?l=zebra&m=100739222210507&w=2 */ | |
4dadc291 | 669 | static int |
68980084 | 670 | lsa_link_ptomp_set (struct stream *s, struct ospf_interface *oi) |
7afa08da | 671 | { |
672 | int links = 0; | |
673 | struct route_node *rn; | |
674 | struct ospf_neighbor *nbr = NULL; | |
675 | struct in_addr id, mask; | |
88d6cf37 | 676 | u_int16_t cost = ospf_link_cost (oi); |
7afa08da | 677 | |
678 | mask.s_addr = 0xffffffff; | |
679 | id.s_addr = oi->address->u.prefix4.s_addr; | |
779adb01 | 680 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); |
7afa08da | 681 | |
1cc8f762 | 682 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 683 | zlog_debug ("PointToMultipoint: running ptomultip_set"); |
7afa08da | 684 | |
685 | /* Search neighbor, */ | |
686 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
687 | if ((nbr = rn->info) != NULL) | |
688 | /* Ignore myself. */ | |
68980084 | 689 | if (!IPV4_ADDR_SAME (&nbr->router_id, &oi->ospf->router_id)) |
7afa08da | 690 | if (nbr->state == NSM_Full) |
691 | ||
692 | { | |
779adb01 | 693 | links += link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
694 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
1cc8f762 | 695 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 696 | zlog_debug ("PointToMultipoint: set link to %s", |
1cc8f762 | 697 | inet_ntoa(oi->address->u.prefix4)); |
7afa08da | 698 | } |
699 | ||
700 | return links; | |
7afa08da | 701 | } |
702 | ||
718e3744 | 703 | /* Set router-LSA link information. */ |
4dadc291 | 704 | static int |
718e3744 | 705 | router_lsa_link_set (struct stream *s, struct ospf_area *area) |
706 | { | |
52dc7ee6 | 707 | struct listnode *node; |
1eb8ef25 | 708 | struct ospf_interface *oi; |
718e3744 | 709 | int links = 0; |
710 | ||
1eb8ef25 | 711 | for (ALL_LIST_ELEMENTS_RO (area->oiflist, node, oi)) |
718e3744 | 712 | { |
718e3744 | 713 | struct interface *ifp = oi->ifp; |
714 | ||
715 | /* Check interface is up, OSPF is enable. */ | |
2e3b2e47 | 716 | if (if_is_operative (ifp)) |
718e3744 | 717 | { |
718 | if (oi->state != ISM_Down) | |
719 | { | |
c81ee5c9 | 720 | oi->lsa_pos_beg = links; |
718e3744 | 721 | /* Describe each link. */ |
722 | switch (oi->type) | |
723 | { | |
724 | case OSPF_IFTYPE_POINTOPOINT: | |
725 | links += lsa_link_ptop_set (s, oi); | |
726 | break; | |
727 | case OSPF_IFTYPE_BROADCAST: | |
728 | links += lsa_link_broadcast_set (s, oi); | |
729 | break; | |
730 | case OSPF_IFTYPE_NBMA: | |
731 | links += lsa_link_nbma_set (s, oi); | |
732 | break; | |
733 | case OSPF_IFTYPE_POINTOMULTIPOINT: | |
68980084 | 734 | links += lsa_link_ptomp_set (s, oi); |
718e3744 | 735 | break; |
736 | case OSPF_IFTYPE_VIRTUALLINK: | |
737 | links += lsa_link_virtuallink_set (s, oi); | |
738 | break; | |
739 | case OSPF_IFTYPE_LOOPBACK: | |
740 | links += lsa_link_loopback_set (s, oi); | |
741 | } | |
c81ee5c9 | 742 | oi->lsa_pos_end = links; |
718e3744 | 743 | } |
744 | } | |
745 | } | |
746 | ||
747 | return links; | |
748 | } | |
749 | ||
750 | /* Set router-LSA body. */ | |
4dadc291 | 751 | static void |
718e3744 | 752 | ospf_router_lsa_body_set (struct stream *s, struct ospf_area *area) |
753 | { | |
754 | unsigned long putp; | |
755 | u_int16_t cnt; | |
756 | ||
757 | /* Set flags. */ | |
758 | stream_putc (s, router_lsa_flags (area)); | |
759 | ||
760 | /* Set Zero fields. */ | |
761 | stream_putc (s, 0); | |
762 | ||
763 | /* Keep pointer to # links. */ | |
9985f83c | 764 | putp = stream_get_endp(s); |
718e3744 | 765 | |
766 | /* Forward word */ | |
767 | stream_putw(s, 0); | |
768 | ||
769 | /* Set all link information. */ | |
770 | cnt = router_lsa_link_set (s, area); | |
771 | ||
772 | /* Set # of links here. */ | |
773 | stream_putw_at (s, putp, cnt); | |
774 | } | |
6b0655a2 | 775 | |
88d6cf37 | 776 | static int |
777 | ospf_stub_router_timer (struct thread *t) | |
778 | { | |
779 | struct ospf_area *area = THREAD_ARG (t); | |
780 | ||
781 | area->t_stub_router = NULL; | |
782 | ||
783 | SET_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
784 | ||
785 | /* clear stub route state and generate router-lsa refresh, don't | |
786 | * clobber an administratively set stub-router state though. | |
787 | */ | |
788 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
789 | return 0; | |
790 | ||
791 | UNSET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
792 | ||
c363d386 | 793 | ospf_router_lsa_update_area (area); |
88d6cf37 | 794 | |
795 | return 0; | |
796 | } | |
718e3744 | 797 | |
f63f06da | 798 | static void |
88d6cf37 | 799 | ospf_stub_router_check (struct ospf_area *area) |
800 | { | |
801 | /* area must either be administratively configured to be stub | |
802 | * or startup-time stub-router must be configured and we must in a pre-stub | |
803 | * state. | |
804 | */ | |
805 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
806 | { | |
807 | SET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
808 | return; | |
809 | } | |
810 | ||
811 | /* not admin-stubbed, check whether startup stubbing is configured and | |
812 | * whether it's not been done yet | |
813 | */ | |
814 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED)) | |
815 | return; | |
816 | ||
817 | if (area->ospf->stub_router_startup_time == OSPF_STUB_ROUTER_UNCONFIGURED) | |
818 | { | |
819 | /* stub-router is hence done forever for this area, even if someone | |
820 | * tries configure it (take effect next restart). | |
821 | */ | |
822 | SET_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
823 | return; | |
824 | } | |
825 | ||
826 | /* startup stub-router configured and not yet done */ | |
827 | SET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
828 | ||
829 | OSPF_AREA_TIMER_ON (area->t_stub_router, ospf_stub_router_timer, | |
830 | area->ospf->stub_router_startup_time); | |
831 | } | |
6b0655a2 | 832 | |
718e3744 | 833 | /* Create new router-LSA. */ |
4dadc291 | 834 | static struct ospf_lsa * |
718e3744 | 835 | ospf_router_lsa_new (struct ospf_area *area) |
836 | { | |
68980084 | 837 | struct ospf *ospf = area->ospf; |
718e3744 | 838 | struct stream *s; |
839 | struct lsa_header *lsah; | |
840 | struct ospf_lsa *new; | |
841 | int length; | |
842 | ||
843 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 844 | zlog_debug ("LSA[Type1]: Create router-LSA instance"); |
718e3744 | 845 | |
88d6cf37 | 846 | /* check whether stub-router is desired, and if this is the first |
847 | * router LSA. | |
848 | */ | |
849 | ospf_stub_router_check (area); | |
850 | ||
718e3744 | 851 | /* Create a stream for LSA. */ |
852 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
718e3744 | 853 | /* Set LSA common header fields. */ |
d4a53d58 | 854 | lsa_header_set (s, LSA_OPTIONS_GET (area) | LSA_OPTIONS_NSSA_GET (area), |
d4a53d58 | 855 | OSPF_ROUTER_LSA, ospf->router_id, ospf->router_id); |
718e3744 | 856 | |
857 | /* Set router-LSA body fields. */ | |
858 | ospf_router_lsa_body_set (s, area); | |
859 | ||
860 | /* Set length. */ | |
861 | length = stream_get_endp (s); | |
779adb01 | 862 | lsah = (struct lsa_header *) STREAM_DATA (s); |
718e3744 | 863 | lsah->length = htons (length); |
864 | ||
865 | /* Now, create OSPF LSA instance. */ | |
c24d602e | 866 | if ( (new = ospf_lsa_new ()) == NULL) |
867 | { | |
868 | zlog_err ("%s: Unable to create new lsa", __func__); | |
869 | return NULL; | |
870 | } | |
871 | ||
718e3744 | 872 | new->area = area; |
f6543138 | 873 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 874 | |
875 | /* Copy LSA data to store, discard stream. */ | |
876 | new->data = ospf_lsa_data_new (length); | |
877 | memcpy (new->data, lsah, length); | |
878 | stream_free (s); | |
879 | ||
880 | return new; | |
881 | } | |
882 | ||
883 | /* Originate Router-LSA. */ | |
88d6cf37 | 884 | static struct ospf_lsa * |
718e3744 | 885 | ospf_router_lsa_originate (struct ospf_area *area) |
886 | { | |
887 | struct ospf_lsa *new; | |
88d6cf37 | 888 | |
718e3744 | 889 | /* Create new router-LSA instance. */ |
c24d602e | 890 | if ( (new = ospf_router_lsa_new (area)) == NULL) |
891 | { | |
892 | zlog_err ("%s: ospf_router_lsa_new returned NULL", __func__); | |
893 | return NULL; | |
894 | } | |
718e3744 | 895 | |
896 | /* Sanity check. */ | |
897 | if (new->data->adv_router.s_addr == 0) | |
898 | { | |
899 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 900 | zlog_debug ("LSA[Type1]: AdvRouter is 0, discard"); |
718e3744 | 901 | ospf_lsa_discard (new); |
902 | return NULL; | |
903 | } | |
904 | ||
905 | /* Install LSA to LSDB. */ | |
68980084 | 906 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 907 | |
908 | /* Update LSA origination count. */ | |
68980084 | 909 | area->ospf->lsa_originate_count++; |
718e3744 | 910 | |
911 | /* Flooding new LSA through area. */ | |
912 | ospf_flood_through_area (area, NULL, new); | |
913 | ||
914 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
915 | { | |
e588f21f | 916 | zlog_debug ("LSA[Type%d:%s]: Originate router-LSA %p", |
718e3744 | 917 | new->data->type, inet_ntoa (new->data->id), new); |
918 | ospf_lsa_header_dump (new->data); | |
919 | } | |
920 | ||
921 | return new; | |
922 | } | |
923 | ||
924 | /* Refresh router-LSA. */ | |
4dadc291 | 925 | static struct ospf_lsa * |
718e3744 | 926 | ospf_router_lsa_refresh (struct ospf_lsa *lsa) |
927 | { | |
928 | struct ospf_area *area = lsa->area; | |
929 | struct ospf_lsa *new; | |
930 | ||
931 | /* Sanity check. */ | |
932 | assert (lsa->data); | |
933 | ||
934 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 935 | ospf_ls_retransmit_delete_nbr_area (area, lsa); |
718e3744 | 936 | |
c363d386 PJ |
937 | /* Unregister LSA from refresh-list */ |
938 | ospf_refresher_unregister_lsa (area->ospf, lsa); | |
939 | ||
718e3744 | 940 | /* Create new router-LSA instance. */ |
c24d602e | 941 | if ( (new = ospf_router_lsa_new (area)) == NULL) |
942 | { | |
943 | zlog_err ("%s: ospf_router_lsa_new returned NULL", __func__); | |
944 | return NULL; | |
945 | } | |
946 | ||
718e3744 | 947 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); |
948 | ||
68980084 | 949 | ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 950 | |
951 | /* Flood LSA through area. */ | |
952 | ospf_flood_through_area (area, NULL, new); | |
953 | ||
954 | /* Debug logging. */ | |
955 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
956 | { | |
e588f21f | 957 | zlog_debug ("LSA[Type%d:%s]: router-LSA refresh", |
718e3744 | 958 | new->data->type, inet_ntoa (new->data->id)); |
959 | ospf_lsa_header_dump (new->data); | |
960 | } | |
961 | ||
962 | return NULL; | |
963 | } | |
964 | ||
c363d386 PJ |
965 | int |
966 | ospf_router_lsa_update_area (struct ospf_area *area) | |
718e3744 | 967 | { |
718e3744 | 968 | if (IS_DEBUG_OSPF_EVENT) |
c363d386 | 969 | zlog_debug ("[router-LSA]: (router-LSA area update)"); |
718e3744 | 970 | |
971 | /* Now refresh router-LSA. */ | |
972 | if (area->router_lsa_self) | |
c363d386 | 973 | ospf_lsa_refresh (area->ospf, area->router_lsa_self); |
718e3744 | 974 | /* Newly originate router-LSA. */ |
975 | else | |
976 | ospf_router_lsa_originate (area); | |
977 | ||
978 | return 0; | |
979 | } | |
980 | ||
718e3744 | 981 | int |
c363d386 | 982 | ospf_router_lsa_update (struct ospf *ospf) |
718e3744 | 983 | { |
1eb8ef25 | 984 | struct listnode *node, *nnode; |
985 | struct ospf_area *area; | |
718e3744 | 986 | |
987 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 988 | zlog_debug ("Timer[router-LSA Update]: (timer expire)"); |
718e3744 | 989 | |
1eb8ef25 | 990 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 991 | { |
718e3744 | 992 | struct ospf_lsa *lsa = area->router_lsa_self; |
993 | struct router_lsa *rl; | |
eb1ce605 | 994 | const char *area_str; |
718e3744 | 995 | |
996 | /* Keep Area ID string. */ | |
997 | area_str = AREA_NAME (area); | |
998 | ||
999 | /* If LSA not exist in this Area, originate new. */ | |
1000 | if (lsa == NULL) | |
1001 | { | |
1002 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1003 | zlog_debug("LSA[Type1]: Create router-LSA for Area %s", area_str); |
718e3744 | 1004 | |
1005 | ospf_router_lsa_originate (area); | |
1006 | } | |
1007 | /* If router-ID is changed, Link ID must change. | |
1008 | First flush old LSA, then originate new. */ | |
68980084 | 1009 | else if (!IPV4_ADDR_SAME (&lsa->data->id, &ospf->router_id)) |
718e3744 | 1010 | { |
1011 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1012 | zlog_debug("LSA[Type%d:%s]: Refresh router-LSA for Area %s", |
718e3744 | 1013 | lsa->data->type, inet_ntoa (lsa->data->id), area_str); |
dfbd5176 | 1014 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 1015 | ospf_lsa_flush_area (lsa, area); |
1fe6ed38 | 1016 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 1017 | area->router_lsa_self = NULL; |
1018 | ||
1019 | /* Refresh router-LSA, (not install) and flood through area. */ | |
c363d386 | 1020 | ospf_router_lsa_update_area (area); |
718e3744 | 1021 | } |
1022 | else | |
1023 | { | |
1024 | rl = (struct router_lsa *) lsa->data; | |
1025 | /* Refresh router-LSA, (not install) and flood through area. */ | |
68980084 | 1026 | if (rl->flags != ospf->flags) |
c363d386 | 1027 | ospf_router_lsa_update_area (area); |
718e3744 | 1028 | } |
1029 | } | |
1030 | ||
1031 | return 0; | |
1032 | } | |
1033 | ||
6b0655a2 | 1034 | |
718e3744 | 1035 | /* network-LSA related functions. */ |
1036 | /* Originate Network-LSA. */ | |
4dadc291 | 1037 | static void |
718e3744 | 1038 | ospf_network_lsa_body_set (struct stream *s, struct ospf_interface *oi) |
1039 | { | |
1040 | struct in_addr mask; | |
1041 | struct route_node *rn; | |
1042 | struct ospf_neighbor *nbr; | |
1043 | ||
1044 | masklen2ip (oi->address->prefixlen, &mask); | |
1045 | stream_put_ipv4 (s, mask.s_addr); | |
1046 | ||
1047 | /* The network-LSA lists those routers that are fully adjacent to | |
1048 | the Designated Router; each fully adjacent router is identified by | |
1049 | its OSPF Router ID. The Designated Router includes itself in this | |
1050 | list. RFC2328, Section 12.4.2 */ | |
1051 | ||
1052 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
1053 | if ((nbr = rn->info) != NULL) | |
1054 | if (nbr->state == NSM_Full || nbr == oi->nbr_self) | |
1055 | stream_put_ipv4 (s, nbr->router_id.s_addr); | |
1056 | } | |
1057 | ||
4dadc291 | 1058 | static struct ospf_lsa * |
718e3744 | 1059 | ospf_network_lsa_new (struct ospf_interface *oi) |
1060 | { | |
1061 | struct stream *s; | |
1062 | struct ospf_lsa *new; | |
1063 | struct lsa_header *lsah; | |
7eb5b47e | 1064 | struct ospf_if_params *oip; |
718e3744 | 1065 | int length; |
1066 | ||
1067 | /* If there are no neighbours on this network (the net is stub), | |
1068 | the router does not originate network-LSA (see RFC 12.4.2) */ | |
1069 | if (oi->full_nbrs == 0) | |
1070 | return NULL; | |
1071 | ||
1072 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1073 | zlog_debug ("LSA[Type2]: Create network-LSA instance"); |
718e3744 | 1074 | |
1075 | /* Create new stream for LSA. */ | |
1076 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1077 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1078 | ||
1079 | lsa_header_set (s, (OPTIONS (oi) | LSA_OPTIONS_GET (oi->area)), | |
68980084 | 1080 | OSPF_NETWORK_LSA, DR (oi), oi->ospf->router_id); |
718e3744 | 1081 | |
1082 | /* Set network-LSA body fields. */ | |
1083 | ospf_network_lsa_body_set (s, oi); | |
1084 | ||
1085 | /* Set length. */ | |
1086 | length = stream_get_endp (s); | |
1087 | lsah->length = htons (length); | |
1088 | ||
1089 | /* Create OSPF LSA instance. */ | |
c24d602e | 1090 | if ( (new = ospf_lsa_new ()) == NULL) |
1091 | { | |
1092 | zlog_err ("%s: ospf_lsa_new returned NULL", __func__); | |
1093 | return NULL; | |
1094 | } | |
1095 | ||
718e3744 | 1096 | new->area = oi->area; |
f6543138 | 1097 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1098 | |
1099 | /* Copy LSA to store. */ | |
1100 | new->data = ospf_lsa_data_new (length); | |
1101 | memcpy (new->data, lsah, length); | |
1102 | stream_free (s); | |
7eb5b47e PJ |
1103 | |
1104 | /* Remember prior network LSA sequence numbers, even if we stop | |
1105 | * originating one for this oi, to try avoid re-originating LSAs with a | |
1106 | * prior sequence number, and thus speed up adjency forming & convergence. | |
1107 | */ | |
1108 | if ((oip = ospf_lookup_if_params (oi->ifp, oi->address->u.prefix4))) | |
1109 | { | |
1110 | new->data->ls_seqnum = oip->network_lsa_seqnum; | |
1111 | new->data->ls_seqnum = lsa_seqnum_increment (new); | |
1112 | } | |
1113 | else | |
1114 | { | |
1115 | oip = ospf_get_if_params (oi->ifp, oi->address->u.prefix4); | |
1116 | ospf_if_update_params (oi->ifp, oi->address->u.prefix4); | |
1117 | } | |
1118 | oip->network_lsa_seqnum = new->data->ls_seqnum; | |
1119 | ||
718e3744 | 1120 | return new; |
1121 | } | |
1122 | ||
1123 | /* Originate network-LSA. */ | |
c363d386 PJ |
1124 | void |
1125 | ospf_network_lsa_update (struct ospf_interface *oi) | |
718e3744 | 1126 | { |
1127 | struct ospf_lsa *new; | |
c363d386 PJ |
1128 | |
1129 | if (oi->network_lsa_self != NULL) | |
1130 | { | |
1131 | ospf_lsa_refresh (oi->ospf, oi->network_lsa_self); | |
1132 | return; | |
1133 | } | |
1134 | ||
718e3744 | 1135 | /* Create new network-LSA instance. */ |
1136 | new = ospf_network_lsa_new (oi); | |
1137 | if (new == NULL) | |
c363d386 | 1138 | return; |
718e3744 | 1139 | |
1140 | /* Install LSA to LSDB. */ | |
68980084 | 1141 | new = ospf_lsa_install (oi->ospf, oi, new); |
718e3744 | 1142 | |
1143 | /* Update LSA origination count. */ | |
68980084 | 1144 | oi->ospf->lsa_originate_count++; |
718e3744 | 1145 | |
1146 | /* Flooding new LSA through area. */ | |
1147 | ospf_flood_through_area (oi->area, NULL, new); | |
1148 | ||
1149 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1150 | { | |
e588f21f | 1151 | zlog_debug ("LSA[Type%d:%s]: Originate network-LSA %p", |
718e3744 | 1152 | new->data->type, inet_ntoa (new->data->id), new); |
1153 | ospf_lsa_header_dump (new->data); | |
1154 | } | |
1155 | ||
c363d386 | 1156 | return; |
718e3744 | 1157 | } |
1158 | ||
c363d386 PJ |
1159 | static struct ospf_lsa * |
1160 | ospf_network_lsa_refresh (struct ospf_lsa *lsa) | |
718e3744 | 1161 | { |
1162 | struct ospf_area *area = lsa->area; | |
c363d386 | 1163 | struct ospf_lsa *new, *new2; |
7eb5b47e | 1164 | struct ospf_if_params *oip; |
4dd87df5 | 1165 | struct ospf_interface *oi; |
c363d386 | 1166 | |
718e3744 | 1167 | assert (lsa->data); |
4dd87df5 PJ |
1168 | |
1169 | /* Retrieve the oi for the network LSA */ | |
1170 | oi = ospf_if_lookup_by_local_addr (area->ospf, NULL, lsa->data->id); | |
1171 | if (oi == NULL) | |
1172 | { | |
1173 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1174 | { | |
1175 | zlog_debug ("LSA[Type%d:%s]: network-LSA refresh: " | |
1176 | "no oi found, ick, ignoring.", | |
1177 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
1178 | ospf_lsa_header_dump (lsa->data); | |
1179 | } | |
1180 | return NULL; | |
1181 | } | |
718e3744 | 1182 | /* Delete LSA from neighbor retransmit-list. */ |
68980084 | 1183 | ospf_ls_retransmit_delete_nbr_area (area, lsa); |
718e3744 | 1184 | |
c363d386 PJ |
1185 | /* Unregister LSA from refresh-list */ |
1186 | ospf_refresher_unregister_lsa (area->ospf, lsa); | |
1187 | ||
718e3744 | 1188 | /* Create new network-LSA instance. */ |
1189 | new = ospf_network_lsa_new (oi); | |
1190 | if (new == NULL) | |
c363d386 | 1191 | return NULL; |
7eb5b47e PJ |
1192 | |
1193 | oip = ospf_lookup_if_params (oi->ifp, oi->address->u.prefix4); | |
1194 | assert (oip != NULL); | |
1195 | oip->network_lsa_seqnum = new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
718e3744 | 1196 | |
c363d386 PJ |
1197 | new2 = ospf_lsa_install (area->ospf, oi, new); |
1198 | ||
1199 | assert (new2 == new); | |
1200 | ||
718e3744 | 1201 | /* Flood LSA through aera. */ |
1202 | ospf_flood_through_area (area, NULL, new); | |
1203 | ||
1204 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1205 | { | |
e588f21f | 1206 | zlog_debug ("LSA[Type%d:%s]: network-LSA refresh", |
718e3744 | 1207 | new->data->type, inet_ntoa (new->data->id)); |
1208 | ospf_lsa_header_dump (new->data); | |
1209 | } | |
1210 | ||
c363d386 | 1211 | return new; |
718e3744 | 1212 | } |
6b0655a2 | 1213 | |
4dadc291 | 1214 | static void |
718e3744 | 1215 | stream_put_ospf_metric (struct stream *s, u_int32_t metric_value) |
1216 | { | |
1217 | u_int32_t metric; | |
1218 | char *mp; | |
1219 | ||
1220 | /* Put 0 metric. TOS metric is not supported. */ | |
1221 | metric = htonl (metric_value); | |
1222 | mp = (char *) &metric; | |
1223 | mp++; | |
1224 | stream_put (s, mp, 3); | |
1225 | } | |
1226 | ||
1227 | /* summary-LSA related functions. */ | |
4dadc291 | 1228 | static void |
718e3744 | 1229 | ospf_summary_lsa_body_set (struct stream *s, struct prefix *p, |
1230 | u_int32_t metric) | |
1231 | { | |
1232 | struct in_addr mask; | |
1233 | ||
1234 | masklen2ip (p->prefixlen, &mask); | |
1235 | ||
1236 | /* Put Network Mask. */ | |
1237 | stream_put_ipv4 (s, mask.s_addr); | |
1238 | ||
1239 | /* Set # TOS. */ | |
1240 | stream_putc (s, (u_char) 0); | |
1241 | ||
1242 | /* Set metric. */ | |
1243 | stream_put_ospf_metric (s, metric); | |
1244 | } | |
1245 | ||
4dadc291 | 1246 | static struct ospf_lsa * |
718e3744 | 1247 | ospf_summary_lsa_new (struct ospf_area *area, struct prefix *p, |
1248 | u_int32_t metric, struct in_addr id) | |
1249 | { | |
1250 | struct stream *s; | |
1251 | struct ospf_lsa *new; | |
1252 | struct lsa_header *lsah; | |
1253 | int length; | |
1254 | ||
c24d602e | 1255 | if (id.s_addr == 0xffffffff) |
1256 | { | |
1257 | /* Maybe Link State ID not available. */ | |
1258 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1259 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1260 | OSPF_SUMMARY_LSA); | |
1261 | return NULL; | |
1262 | } | |
1263 | ||
718e3744 | 1264 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 1265 | zlog_debug ("LSA[Type3]: Create summary-LSA instance"); |
718e3744 | 1266 | |
1267 | /* Create new stream for LSA. */ | |
1268 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1269 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1270 | ||
68980084 | 1271 | lsa_header_set (s, LSA_OPTIONS_GET (area), OSPF_SUMMARY_LSA, |
1272 | id, area->ospf->router_id); | |
718e3744 | 1273 | |
1274 | /* Set summary-LSA body fields. */ | |
1275 | ospf_summary_lsa_body_set (s, p, metric); | |
1276 | ||
1277 | /* Set length. */ | |
1278 | length = stream_get_endp (s); | |
1279 | lsah->length = htons (length); | |
1280 | ||
1281 | /* Create OSPF LSA instance. */ | |
1282 | new = ospf_lsa_new (); | |
1283 | new->area = area; | |
f6543138 | 1284 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1285 | |
1286 | /* Copy LSA to store. */ | |
1287 | new->data = ospf_lsa_data_new (length); | |
1288 | memcpy (new->data, lsah, length); | |
1289 | stream_free (s); | |
1290 | ||
1291 | return new; | |
1292 | } | |
1293 | ||
1294 | /* Originate Summary-LSA. */ | |
1295 | struct ospf_lsa * | |
1296 | ospf_summary_lsa_originate (struct prefix_ipv4 *p, u_int32_t metric, | |
1297 | struct ospf_area *area) | |
1298 | { | |
1299 | struct ospf_lsa *new; | |
1300 | struct in_addr id; | |
1301 | ||
68980084 | 1302 | id = ospf_lsa_unique_id (area->ospf, area->lsdb, OSPF_SUMMARY_LSA, p); |
718e3744 | 1303 | |
c24d602e | 1304 | if (id.s_addr == 0xffffffff) |
1305 | { | |
1306 | /* Maybe Link State ID not available. */ | |
1307 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1308 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1309 | OSPF_SUMMARY_LSA); | |
1310 | return NULL; | |
1311 | } | |
1312 | ||
718e3744 | 1313 | /* Create new summary-LSA instance. */ |
c24d602e | 1314 | if ( !(new = ospf_summary_lsa_new (area, (struct prefix *) p, metric, id))) |
1315 | return NULL; | |
718e3744 | 1316 | |
1317 | /* Instlal LSA to LSDB. */ | |
68980084 | 1318 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 1319 | |
1320 | /* Update LSA origination count. */ | |
68980084 | 1321 | area->ospf->lsa_originate_count++; |
718e3744 | 1322 | |
1323 | /* Flooding new LSA through area. */ | |
1324 | ospf_flood_through_area (area, NULL, new); | |
1325 | ||
1326 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1327 | { | |
e588f21f | 1328 | zlog_debug ("LSA[Type%d:%s]: Originate summary-LSA %p", |
718e3744 | 1329 | new->data->type, inet_ntoa (new->data->id), new); |
1330 | ospf_lsa_header_dump (new->data); | |
1331 | } | |
1332 | ||
1333 | return new; | |
1334 | } | |
1335 | ||
c363d386 | 1336 | static struct ospf_lsa* |
68980084 | 1337 | ospf_summary_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1338 | { |
1339 | struct ospf_lsa *new; | |
1340 | struct summary_lsa *sl; | |
1341 | struct prefix p; | |
1342 | ||
1343 | /* Sanity check. */ | |
1344 | assert (lsa->data); | |
1345 | ||
1346 | sl = (struct summary_lsa *)lsa->data; | |
1347 | p.prefixlen = ip_masklen (sl->mask); | |
1348 | new = ospf_summary_lsa_new (lsa->area, &p, GET_METRIC (sl->metric), | |
1349 | sl->header.id); | |
c24d602e | 1350 | |
1351 | if (!new) | |
1352 | return NULL; | |
1353 | ||
718e3744 | 1354 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); |
718e3744 | 1355 | |
68980084 | 1356 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 1357 | |
1358 | /* Flood LSA through AS. */ | |
1359 | ospf_flood_through_area (new->area, NULL, new); | |
1360 | ||
1361 | /* Debug logging. */ | |
1362 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1363 | { | |
e588f21f | 1364 | zlog_debug ("LSA[Type%d:%s]: summary-LSA refresh", |
718e3744 | 1365 | new->data->type, inet_ntoa (new->data->id)); |
1366 | ospf_lsa_header_dump (new->data); | |
1367 | } | |
1368 | ||
1369 | return new; | |
1370 | } | |
1371 | ||
6b0655a2 | 1372 | |
718e3744 | 1373 | /* summary-ASBR-LSA related functions. */ |
4dadc291 | 1374 | static void |
718e3744 | 1375 | ospf_summary_asbr_lsa_body_set (struct stream *s, struct prefix *p, |
1376 | u_int32_t metric) | |
1377 | { | |
718e3744 | 1378 | /* Put Network Mask. */ |
2345a222 | 1379 | stream_put_ipv4 (s, (u_int32_t) 0); |
718e3744 | 1380 | |
1381 | /* Set # TOS. */ | |
1382 | stream_putc (s, (u_char) 0); | |
1383 | ||
1384 | /* Set metric. */ | |
1385 | stream_put_ospf_metric (s, metric); | |
1386 | } | |
1387 | ||
4dadc291 | 1388 | static struct ospf_lsa * |
718e3744 | 1389 | ospf_summary_asbr_lsa_new (struct ospf_area *area, struct prefix *p, |
1390 | u_int32_t metric, struct in_addr id) | |
1391 | { | |
1392 | struct stream *s; | |
1393 | struct ospf_lsa *new; | |
1394 | struct lsa_header *lsah; | |
1395 | int length; | |
1396 | ||
c24d602e | 1397 | if (id.s_addr == 0xffffffff) |
1398 | { | |
1399 | /* Maybe Link State ID not available. */ | |
1400 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1401 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1402 | OSPF_ASBR_SUMMARY_LSA); | |
1403 | return NULL; | |
1404 | } | |
1405 | ||
718e3744 | 1406 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 1407 | zlog_debug ("LSA[Type3]: Create summary-LSA instance"); |
718e3744 | 1408 | |
1409 | /* Create new stream for LSA. */ | |
1410 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1411 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1412 | ||
68980084 | 1413 | lsa_header_set (s, LSA_OPTIONS_GET (area), OSPF_ASBR_SUMMARY_LSA, |
1414 | id, area->ospf->router_id); | |
718e3744 | 1415 | |
1416 | /* Set summary-LSA body fields. */ | |
1417 | ospf_summary_asbr_lsa_body_set (s, p, metric); | |
1418 | ||
1419 | /* Set length. */ | |
1420 | length = stream_get_endp (s); | |
1421 | lsah->length = htons (length); | |
1422 | ||
1423 | /* Create OSPF LSA instance. */ | |
1424 | new = ospf_lsa_new (); | |
1425 | new->area = area; | |
f6543138 | 1426 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1427 | |
1428 | /* Copy LSA to store. */ | |
1429 | new->data = ospf_lsa_data_new (length); | |
1430 | memcpy (new->data, lsah, length); | |
1431 | stream_free (s); | |
1432 | ||
1433 | return new; | |
1434 | } | |
1435 | ||
1436 | /* Originate summary-ASBR-LSA. */ | |
1437 | struct ospf_lsa * | |
1438 | ospf_summary_asbr_lsa_originate (struct prefix_ipv4 *p, u_int32_t metric, | |
1439 | struct ospf_area *area) | |
1440 | { | |
1441 | struct ospf_lsa *new; | |
1442 | struct in_addr id; | |
1443 | ||
68980084 | 1444 | id = ospf_lsa_unique_id (area->ospf, area->lsdb, OSPF_ASBR_SUMMARY_LSA, p); |
718e3744 | 1445 | |
c24d602e | 1446 | if (id.s_addr == 0xffffffff) |
1447 | { | |
1448 | /* Maybe Link State ID not available. */ | |
1449 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1450 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1451 | OSPF_ASBR_SUMMARY_LSA); | |
1452 | return NULL; | |
1453 | } | |
1454 | ||
718e3744 | 1455 | /* Create new summary-LSA instance. */ |
1456 | new = ospf_summary_asbr_lsa_new (area, (struct prefix *) p, metric, id); | |
c24d602e | 1457 | if (!new) |
1458 | return NULL; | |
718e3744 | 1459 | |
1460 | /* Install LSA to LSDB. */ | |
68980084 | 1461 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 1462 | |
1463 | /* Update LSA origination count. */ | |
68980084 | 1464 | area->ospf->lsa_originate_count++; |
718e3744 | 1465 | |
1466 | /* Flooding new LSA through area. */ | |
1467 | ospf_flood_through_area (area, NULL, new); | |
1468 | ||
1469 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1470 | { | |
e588f21f | 1471 | zlog_debug ("LSA[Type%d:%s]: Originate summary-ASBR-LSA %p", |
718e3744 | 1472 | new->data->type, inet_ntoa (new->data->id), new); |
1473 | ospf_lsa_header_dump (new->data); | |
1474 | } | |
1475 | ||
1476 | return new; | |
1477 | } | |
1478 | ||
c363d386 | 1479 | static struct ospf_lsa* |
68980084 | 1480 | ospf_summary_asbr_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1481 | { |
1482 | struct ospf_lsa *new; | |
1483 | struct summary_lsa *sl; | |
1484 | struct prefix p; | |
1485 | ||
1486 | /* Sanity check. */ | |
1487 | assert (lsa->data); | |
1488 | ||
1489 | sl = (struct summary_lsa *)lsa->data; | |
1490 | p.prefixlen = ip_masklen (sl->mask); | |
1491 | new = ospf_summary_asbr_lsa_new (lsa->area, &p, GET_METRIC (sl->metric), | |
1492 | sl->header.id); | |
c24d602e | 1493 | if (!new) |
1494 | return NULL; | |
718e3744 | 1495 | |
1496 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
718e3744 | 1497 | |
68980084 | 1498 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 1499 | |
1500 | /* Flood LSA through area. */ | |
1501 | ospf_flood_through_area (new->area, NULL, new); | |
1502 | ||
1503 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1504 | { | |
e588f21f | 1505 | zlog_debug ("LSA[Type%d:%s]: summary-ASBR-LSA refresh", |
718e3744 | 1506 | new->data->type, inet_ntoa (new->data->id)); |
1507 | ospf_lsa_header_dump (new->data); | |
1508 | } | |
1509 | ||
1510 | return new; | |
1511 | } | |
1512 | ||
1513 | /* AS-external-LSA related functions. */ | |
1514 | ||
1515 | /* Get nexthop for AS-external-LSAs. Return nexthop if its interface | |
1516 | is connected, else 0*/ | |
4dadc291 | 1517 | static struct in_addr |
68980084 | 1518 | ospf_external_lsa_nexthop_get (struct ospf *ospf, struct in_addr nexthop) |
718e3744 | 1519 | { |
1520 | struct in_addr fwd; | |
1521 | struct prefix nh; | |
1eb8ef25 | 1522 | struct listnode *node; |
1523 | struct ospf_interface *oi; | |
718e3744 | 1524 | |
1525 | fwd.s_addr = 0; | |
1526 | ||
1527 | if (!nexthop.s_addr) | |
1528 | return fwd; | |
1529 | ||
1530 | /* Check whether nexthop is covered by OSPF network. */ | |
1531 | nh.family = AF_INET; | |
1532 | nh.u.prefix4 = nexthop; | |
1533 | nh.prefixlen = IPV4_MAX_BITLEN; | |
4ca15d4a PJ |
1534 | |
1535 | /* XXX/SCALE: If there were a lot of oi's on an ifp, then it'd be | |
1536 | * better to make use of the per-ifp table of ois. | |
1537 | */ | |
1eb8ef25 | 1538 | for (ALL_LIST_ELEMENTS_RO (ospf->oiflist, node, oi)) |
1539 | if (if_is_operative (oi->ifp)) | |
1540 | if (oi->address->family == AF_INET) | |
1541 | if (prefix_match (oi->address, &nh)) | |
1542 | return nexthop; | |
718e3744 | 1543 | |
1544 | return fwd; | |
1545 | } | |
1546 | ||
718e3744 | 1547 | /* NSSA-external-LSA related functions. */ |
1548 | ||
1549 | /* Get 1st IP connection for Forward Addr */ | |
4dadc291 | 1550 | |
718e3744 | 1551 | struct in_addr |
1552 | ospf_get_ip_from_ifp (struct ospf_interface *oi) | |
1553 | { | |
1554 | struct in_addr fwd; | |
1555 | ||
1556 | fwd.s_addr = 0; | |
1557 | ||
2e3b2e47 | 1558 | if (if_is_operative (oi->ifp)) |
718e3744 | 1559 | return oi->address->u.prefix4; |
1560 | ||
1561 | return fwd; | |
1562 | } | |
1563 | ||
1564 | /* Get 1st IP connection for Forward Addr */ | |
1565 | struct in_addr | |
f2c80652 | 1566 | ospf_get_nssa_ip (struct ospf_area *area) |
718e3744 | 1567 | { |
1568 | struct in_addr fwd; | |
f2c80652 | 1569 | struct in_addr best_default; |
1eb8ef25 | 1570 | struct listnode *node; |
1571 | struct ospf_interface *oi; | |
718e3744 | 1572 | |
1573 | fwd.s_addr = 0; | |
f2c80652 | 1574 | best_default.s_addr = 0; |
718e3744 | 1575 | |
1eb8ef25 | 1576 | for (ALL_LIST_ELEMENTS_RO (area->ospf->oiflist, node, oi)) |
718e3744 | 1577 | { |
2e3b2e47 | 1578 | if (if_is_operative (oi->ifp)) |
718e3744 | 1579 | if (oi->area->external_routing == OSPF_AREA_NSSA) |
68980084 | 1580 | if (oi->address && oi->address->family == AF_INET) |
1581 | { | |
1582 | if (best_default.s_addr == 0) | |
1583 | best_default = oi->address->u.prefix4; | |
1584 | if (oi->area == area) | |
1585 | return oi->address->u.prefix4; | |
f2c80652 | 1586 | } |
718e3744 | 1587 | } |
f2c80652 | 1588 | if (best_default.s_addr != 0) |
1589 | return best_default; | |
718e3744 | 1590 | |
68980084 | 1591 | if (best_default.s_addr != 0) |
1592 | return best_default; | |
1593 | ||
718e3744 | 1594 | return fwd; |
1595 | } | |
beebba75 | 1596 | |
718e3744 | 1597 | #define DEFAULT_DEFAULT_METRIC 20 |
1598 | #define DEFAULT_DEFAULT_ORIGINATE_METRIC 10 | |
1599 | #define DEFAULT_DEFAULT_ALWAYS_METRIC 1 | |
1600 | ||
1601 | #define DEFAULT_METRIC_TYPE EXTERNAL_METRIC_TYPE_2 | |
1602 | ||
1603 | int | |
7c8ff89e | 1604 | metric_type (struct ospf *ospf, u_char src, u_short instance) |
718e3744 | 1605 | { |
7c8ff89e DS |
1606 | struct ospf_redist *red; |
1607 | ||
1608 | red = ospf_redist_lookup(ospf, src, instance); | |
1609 | ||
1610 | return ((!red || red->dmetric.type < 0) ? | |
1611 | DEFAULT_METRIC_TYPE : red->dmetric.type); | |
718e3744 | 1612 | } |
1613 | ||
1614 | int | |
7c8ff89e | 1615 | metric_value (struct ospf *ospf, u_char src, u_short instance) |
718e3744 | 1616 | { |
7c8ff89e DS |
1617 | struct ospf_redist *red; |
1618 | ||
1619 | red = ospf_redist_lookup(ospf, src, instance); | |
1620 | if (!red || red->dmetric.value < 0) | |
718e3744 | 1621 | { |
1622 | if (src == DEFAULT_ROUTE) | |
1623 | { | |
68980084 | 1624 | if (ospf->default_originate == DEFAULT_ORIGINATE_ZEBRA) |
718e3744 | 1625 | return DEFAULT_DEFAULT_ORIGINATE_METRIC; |
1626 | else | |
1627 | return DEFAULT_DEFAULT_ALWAYS_METRIC; | |
1628 | } | |
68980084 | 1629 | else if (ospf->default_metric < 0) |
718e3744 | 1630 | return DEFAULT_DEFAULT_METRIC; |
1631 | else | |
68980084 | 1632 | return ospf->default_metric; |
718e3744 | 1633 | } |
1634 | ||
7c8ff89e | 1635 | return red->dmetric.value; |
718e3744 | 1636 | } |
1637 | ||
1638 | /* Set AS-external-LSA body. */ | |
4dadc291 | 1639 | static void |
68980084 | 1640 | ospf_external_lsa_body_set (struct stream *s, struct external_info *ei, |
1641 | struct ospf *ospf) | |
718e3744 | 1642 | { |
1643 | struct prefix_ipv4 *p = &ei->p; | |
1644 | struct in_addr mask, fwd_addr; | |
1645 | u_int32_t mvalue; | |
1646 | int mtype; | |
1647 | int type; | |
7c8ff89e | 1648 | u_short instance; |
718e3744 | 1649 | |
1650 | /* Put Network Mask. */ | |
1651 | masklen2ip (p->prefixlen, &mask); | |
1652 | stream_put_ipv4 (s, mask.s_addr); | |
1653 | ||
1654 | /* If prefix is default, specify DEFAULT_ROUTE. */ | |
1655 | type = is_prefix_default (&ei->p) ? DEFAULT_ROUTE : ei->type; | |
7c8ff89e | 1656 | instance = is_prefix_default (&ei->p) ? 0 : ei->instance; |
718e3744 | 1657 | |
1658 | mtype = (ROUTEMAP_METRIC_TYPE (ei) != -1) ? | |
7c8ff89e | 1659 | ROUTEMAP_METRIC_TYPE (ei) : metric_type (ospf, type, instance); |
718e3744 | 1660 | |
1661 | mvalue = (ROUTEMAP_METRIC (ei) != -1) ? | |
7c8ff89e | 1662 | ROUTEMAP_METRIC (ei) : metric_value (ospf, type, instance); |
718e3744 | 1663 | |
1664 | /* Put type of external metric. */ | |
1665 | stream_putc (s, (mtype == EXTERNAL_METRIC_TYPE_2 ? 0x80 : 0)); | |
1666 | ||
1667 | /* Put 0 metric. TOS metric is not supported. */ | |
1668 | stream_put_ospf_metric (s, mvalue); | |
1669 | ||
1670 | /* Get forwarding address to nexthop if on the Connection List, else 0. */ | |
68980084 | 1671 | fwd_addr = ospf_external_lsa_nexthop_get (ospf, ei->nexthop); |
718e3744 | 1672 | |
1673 | /* Put forwarding address. */ | |
1674 | stream_put_ipv4 (s, fwd_addr.s_addr); | |
1675 | ||
0d9551dc DS |
1676 | /* Put route tag -- only first 16bits are used for compatibility */ |
1677 | stream_putl (s, ei->tag); | |
718e3744 | 1678 | } |
1679 | ||
1680 | /* Create new external-LSA. */ | |
4dadc291 | 1681 | static struct ospf_lsa * |
68980084 | 1682 | ospf_external_lsa_new (struct ospf *ospf, |
1683 | struct external_info *ei, struct in_addr *old_id) | |
718e3744 | 1684 | { |
1685 | struct stream *s; | |
1686 | struct lsa_header *lsah; | |
1687 | struct ospf_lsa *new; | |
1688 | struct in_addr id; | |
1689 | int length; | |
1690 | ||
1691 | if (ei == NULL) | |
1692 | { | |
1693 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
ad8d4802 | 1694 | zlog_debug ("LSA[Type5]: External info is NULL, can't originate"); |
718e3744 | 1695 | return NULL; |
1696 | } | |
1697 | ||
1698 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1699 | zlog_debug ("LSA[Type5]: Originate AS-external-LSA instance"); |
718e3744 | 1700 | |
1701 | /* If old Link State ID is specified, refresh LSA with same ID. */ | |
1702 | if (old_id) | |
1703 | id = *old_id; | |
1704 | /* Get Link State with unique ID. */ | |
1705 | else | |
1706 | { | |
68980084 | 1707 | id = ospf_lsa_unique_id (ospf, ospf->lsdb, OSPF_AS_EXTERNAL_LSA, &ei->p); |
718e3744 | 1708 | if (id.s_addr == 0xffffffff) |
1709 | { | |
1710 | /* Maybe Link State ID not available. */ | |
1711 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1712 | zlog_debug ("LSA[Type5]: Link ID not available, can't originate"); |
718e3744 | 1713 | return NULL; |
1714 | } | |
1715 | } | |
1716 | ||
1717 | /* Create new stream for LSA. */ | |
1718 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1719 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1720 | ||
1721 | /* Set LSA common header fields. */ | |
68980084 | 1722 | lsa_header_set (s, OSPF_OPTION_E, OSPF_AS_EXTERNAL_LSA, |
1723 | id, ospf->router_id); | |
718e3744 | 1724 | |
1725 | /* Set AS-external-LSA body fields. */ | |
68980084 | 1726 | ospf_external_lsa_body_set (s, ei, ospf); |
718e3744 | 1727 | |
1728 | /* Set length. */ | |
1729 | length = stream_get_endp (s); | |
1730 | lsah->length = htons (length); | |
1731 | ||
1732 | /* Now, create OSPF LSA instance. */ | |
1733 | new = ospf_lsa_new (); | |
1734 | new->area = NULL; | |
f6543138 | 1735 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_APPROVED | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1736 | |
1737 | /* Copy LSA data to store, discard stream. */ | |
1738 | new->data = ospf_lsa_data_new (length); | |
1739 | memcpy (new->data, lsah, length); | |
1740 | stream_free (s); | |
1741 | ||
1742 | return new; | |
1743 | } | |
1744 | ||
718e3744 | 1745 | /* As Type-7 */ |
4dadc291 | 1746 | static void |
68980084 | 1747 | ospf_install_flood_nssa (struct ospf *ospf, |
1748 | struct ospf_lsa *lsa, struct external_info *ei) | |
718e3744 | 1749 | { |
d4a53d58 | 1750 | struct ospf_lsa *new; |
68980084 | 1751 | struct as_external_lsa *extlsa; |
1eb8ef25 | 1752 | struct ospf_area *area; |
1753 | struct listnode *node, *nnode; | |
718e3744 | 1754 | |
d4a53d58 | 1755 | /* LSA may be a Type-5 originated via translation of a Type-7 LSA |
1756 | * which originated from an NSSA area. In which case it should not be | |
1757 | * flooded back to NSSA areas. | |
1758 | */ | |
1759 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
1760 | return; | |
1761 | ||
718e3744 | 1762 | /* NSSA Originate or Refresh (If anyNSSA) |
1763 | ||
1764 | LSA is self-originated. And just installed as Type-5. | |
1765 | Additionally, install as Type-7 LSDB for every attached NSSA. | |
1766 | ||
1767 | P-Bit controls which ABR performs translation to outside world; If | |
1768 | we are an ABR....do not set the P-bit, because we send the Type-5, | |
1769 | not as the ABR Translator, but as the ASBR owner within the AS! | |
1770 | ||
1771 | If we are NOT ABR, Flood through NSSA as Type-7 w/P-bit set. The | |
1772 | elected ABR Translator will see the P-bit, Translate, and re-flood. | |
1773 | ||
1774 | Later, ABR_TASK and P-bit will scan Type-7 LSDB and translate to | |
1775 | Type-5's to non-NSSA Areas. (it will also attempt a re-install) */ | |
1776 | ||
1eb8ef25 | 1777 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
68980084 | 1778 | { |
0c14ad88 | 1779 | /* Don't install Type-7 LSA's into nonNSSA area */ |
1780 | if (area->external_routing != OSPF_AREA_NSSA) | |
1781 | continue; | |
718e3744 | 1782 | |
68980084 | 1783 | /* make lsa duplicate, lock=1 */ |
d4a53d58 | 1784 | new = ospf_lsa_dup (lsa); |
1785 | new->area = area; | |
1786 | new->data->type = OSPF_AS_NSSA_LSA; | |
718e3744 | 1787 | |
68980084 | 1788 | /* set P-bit if not ABR */ |
020709f9 | 1789 | if (! IS_OSPF_ABR (ospf)) |
68980084 | 1790 | { |
d4a53d58 | 1791 | SET_FLAG(new->data->options, OSPF_OPTION_NP); |
68980084 | 1792 | |
1793 | /* set non-zero FWD ADDR | |
1794 | ||
1795 | draft-ietf-ospf-nssa-update-09.txt | |
1796 | ||
1797 | if the network between the NSSA AS boundary router and the | |
1798 | adjacent AS is advertised into OSPF as an internal OSPF route, | |
1799 | the forwarding address should be the next op address as is cu | |
1800 | currently done with type-5 LSAs. If the intervening network is | |
1801 | not adversited into OSPF as an internal OSPF route and the | |
1802 | type-7 LSA's P-bit is set a forwarding address should be | |
1803 | selected from one of the router's active OSPF inteface addresses | |
1804 | which belong to the NSSA. If no such addresses exist, then | |
1805 | no type-7 LSA's with the P-bit set should originate from this | |
1806 | router. */ | |
1807 | ||
d4a53d58 | 1808 | /* kevinm: not updating lsa anymore, just new */ |
1809 | extlsa = (struct as_external_lsa *)(new->data); | |
68980084 | 1810 | |
1811 | if (extlsa->e[0].fwd_addr.s_addr == 0) | |
1812 | extlsa->e[0].fwd_addr = ospf_get_nssa_ip(area); /* this NSSA area in ifp */ | |
718e3744 | 1813 | |
d748032f | 1814 | if (extlsa->e[0].fwd_addr.s_addr == 0) |
1815 | { | |
1816 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1817 | zlog_debug ("LSA[Type-7]: Could not build FWD-ADDR"); |
1fe6ed38 | 1818 | ospf_lsa_discard (new); |
d748032f | 1819 | return; |
1820 | } | |
f2c80652 | 1821 | } |
718e3744 | 1822 | |
68980084 | 1823 | /* install also as Type-7 */ |
d4a53d58 | 1824 | ospf_lsa_install (ospf, NULL, new); /* Remove Old, Lock New = 2 */ |
68980084 | 1825 | |
1826 | /* will send each copy, lock=2+n */ | |
d4a53d58 | 1827 | ospf_flood_through_as (ospf, NULL, new); /* all attached NSSA's, no AS/STUBs */ |
1828 | } | |
1829 | } | |
1830 | ||
4dadc291 | 1831 | static struct ospf_lsa * |
d4a53d58 | 1832 | ospf_lsa_translated_nssa_new (struct ospf *ospf, |
1833 | struct ospf_lsa *type7) | |
1834 | { | |
1835 | ||
1836 | struct ospf_lsa *new; | |
1837 | struct as_external_lsa *ext, *extnew; | |
1838 | struct external_info ei; | |
1839 | ||
1840 | ext = (struct as_external_lsa *)(type7->data); | |
1841 | ||
1842 | /* need external_info struct, fill in bare minimum */ | |
1843 | ei.p.family = AF_INET; | |
1844 | ei.p.prefix = type7->data->id; | |
1845 | ei.p.prefixlen = ip_masklen (ext->mask); | |
1846 | ei.type = ZEBRA_ROUTE_OSPF; | |
1847 | ei.nexthop = ext->header.adv_router; | |
1848 | ei.route_map_set.metric = -1; | |
1849 | ei.route_map_set.metric_type = -1; | |
1850 | ei.tag = 0; | |
1851 | ||
1852 | if ( (new = ospf_external_lsa_new (ospf, &ei, &type7->data->id)) == NULL) | |
1853 | { | |
1854 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1855 | zlog_debug ("ospf_nssa_translate_originate(): Could not originate " |
d4a53d58 | 1856 | "Translated Type-5 for %s", |
1857 | inet_ntoa (ei.p.prefix)); | |
1858 | return NULL; | |
1859 | } | |
1860 | ||
1861 | extnew = (struct as_external_lsa *)(new->data); | |
1862 | ||
1863 | /* copy over Type-7 data to new */ | |
1864 | extnew->e[0].tos = ext->e[0].tos; | |
1865 | extnew->e[0].route_tag = ext->e[0].route_tag; | |
1866 | extnew->e[0].fwd_addr.s_addr = ext->e[0].fwd_addr.s_addr; | |
1867 | new->data->ls_seqnum = type7->data->ls_seqnum; | |
1868 | ||
1869 | /* add translated flag, checksum and lock new lsa */ | |
1870 | SET_FLAG (new->flags, OSPF_LSA_LOCAL_XLT); /* Translated from 7 */ | |
d4a53d58 | 1871 | new = ospf_lsa_lock (new); |
1872 | ||
1873 | return new; | |
1874 | } | |
1875 | ||
d4a53d58 | 1876 | /* Originate Translated Type-5 for supplied Type-7 NSSA LSA */ |
1877 | struct ospf_lsa * | |
1878 | ospf_translated_nssa_originate (struct ospf *ospf, struct ospf_lsa *type7) | |
1879 | { | |
1880 | struct ospf_lsa *new; | |
1881 | struct as_external_lsa *extnew; | |
1882 | ||
1883 | /* we cant use ospf_external_lsa_originate() as we need to set | |
1884 | * the OSPF_LSA_LOCAL_XLT flag, must originate by hand | |
1885 | */ | |
1886 | ||
1887 | if ( (new = ospf_lsa_translated_nssa_new (ospf, type7)) == NULL) | |
1888 | { | |
1889 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1890 | zlog_debug ("ospf_translated_nssa_originate(): Could not translate " |
d4a53d58 | 1891 | "Type-7, Id %s, to Type-5", |
1892 | inet_ntoa (type7->data->id)); | |
1893 | return NULL; | |
1894 | } | |
1895 | ||
1896 | extnew = (struct as_external_lsa *)new; | |
1897 | ||
1898 | if (IS_DEBUG_OSPF_NSSA) | |
1899 | { | |
e588f21f | 1900 | zlog_debug ("ospf_translated_nssa_originate(): " |
d4a53d58 | 1901 | "translated Type 7, installed:"); |
1902 | ospf_lsa_header_dump (new->data); | |
e588f21f | 1903 | zlog_debug (" Network mask: %d",ip_masklen (extnew->mask)); |
1904 | zlog_debug (" Forward addr: %s", inet_ntoa (extnew->e[0].fwd_addr)); | |
d4a53d58 | 1905 | } |
1906 | ||
1907 | if ( (new = ospf_lsa_install (ospf, NULL, new)) == NULL) | |
1908 | { | |
8c9ed279 | 1909 | if (IS_DEBUG_OSPF_NSSA) |
e588f21f | 1910 | zlog_debug ("ospf_lsa_translated_nssa_originate(): " |
d4a53d58 | 1911 | "Could not install LSA " |
1912 | "id %s", inet_ntoa (type7->data->id)); | |
1913 | return NULL; | |
1914 | } | |
1915 | ||
1916 | ospf->lsa_originate_count++; | |
1917 | ospf_flood_through_as (ospf, NULL, new); | |
1918 | ||
1919 | return new; | |
1920 | } | |
1921 | ||
1922 | /* Refresh Translated from NSSA AS-external-LSA. */ | |
1923 | struct ospf_lsa * | |
1924 | ospf_translated_nssa_refresh (struct ospf *ospf, struct ospf_lsa *type7, | |
1925 | struct ospf_lsa *type5) | |
1926 | { | |
1927 | struct ospf_lsa *new = NULL; | |
1928 | ||
1929 | /* Sanity checks. */ | |
1930 | assert (type7 || type5); | |
ae128056 | 1931 | if (!(type7 || type5)) |
e54e6e57 | 1932 | return NULL; |
d4a53d58 | 1933 | if (type7) |
1934 | assert (type7->data); | |
1935 | if (type5) | |
1936 | assert (type5->data); | |
1937 | assert (ospf->anyNSSA); | |
1938 | ||
1939 | /* get required data according to what has been given */ | |
1940 | if (type7 && type5 == NULL) | |
1941 | { | |
1942 | /* find the translated Type-5 for this Type-7 */ | |
1943 | struct as_external_lsa *ext = (struct as_external_lsa *)(type7->data); | |
1944 | struct prefix_ipv4 p = | |
1945 | { | |
1946 | .prefix = type7->data->id, | |
1947 | .prefixlen = ip_masklen (ext->mask), | |
1948 | .family = AF_INET, | |
1949 | }; | |
1950 | ||
1951 | type5 = ospf_external_info_find_lsa (ospf, &p); | |
1952 | } | |
1953 | else if (type5 && type7 == NULL) | |
1954 | { | |
1955 | /* find the type-7 from which supplied type-5 was translated, | |
1956 | * ie find first type-7 with same LSA Id. | |
1957 | */ | |
1eb8ef25 | 1958 | struct listnode *ln, *lnn; |
d4a53d58 | 1959 | struct route_node *rn; |
1960 | struct ospf_lsa *lsa; | |
1961 | struct ospf_area *area; | |
1962 | ||
1eb8ef25 | 1963 | for (ALL_LIST_ELEMENTS (ospf->areas, ln, lnn, area)) |
d4a53d58 | 1964 | { |
1965 | if (area->external_routing != OSPF_AREA_NSSA | |
1966 | && !type7) | |
1967 | continue; | |
1968 | ||
1969 | LSDB_LOOP (NSSA_LSDB(area), rn, lsa) | |
1970 | { | |
1971 | if (lsa->data->id.s_addr == type5->data->id.s_addr) | |
1972 | { | |
1973 | type7 = lsa; | |
1974 | break; | |
1975 | } | |
1976 | } | |
1977 | } | |
68980084 | 1978 | } |
d4a53d58 | 1979 | |
1980 | /* do we have type7? */ | |
1981 | if (!type7) | |
1982 | { | |
1983 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1984 | zlog_debug ("ospf_translated_nssa_refresh(): no Type-7 found for " |
d4a53d58 | 1985 | "Type-5 LSA Id %s", |
e54e6e57 | 1986 | inet_ntoa (type5->data->id)); |
d4a53d58 | 1987 | return NULL; |
1988 | } | |
1989 | ||
1990 | /* do we have valid translated type5? */ | |
1991 | if (type5 == NULL || !CHECK_FLAG (type5->flags, OSPF_LSA_LOCAL_XLT) ) | |
1992 | { | |
1993 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1994 | zlog_debug ("ospf_translated_nssa_refresh(): No translated Type-5 " |
d4a53d58 | 1995 | "found for Type-7 with Id %s", |
1996 | inet_ntoa (type7->data->id)); | |
1997 | return NULL; | |
1998 | } | |
1999 | ||
2000 | /* Delete LSA from neighbor retransmit-list. */ | |
2001 | ospf_ls_retransmit_delete_nbr_as (ospf, type5); | |
2002 | ||
2003 | /* create new translated LSA */ | |
2004 | if ( (new = ospf_lsa_translated_nssa_new (ospf, type7)) == NULL) | |
2005 | { | |
2006 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 2007 | zlog_debug ("ospf_translated_nssa_refresh(): Could not translate " |
d4a53d58 | 2008 | "Type-7 for %s to Type-5", |
2009 | inet_ntoa (type7->data->id)); | |
2010 | return NULL; | |
2011 | } | |
2012 | ||
2013 | if ( !(new = ospf_lsa_install (ospf, NULL, new)) ) | |
2014 | { | |
2015 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 2016 | zlog_debug ("ospf_translated_nssa_refresh(): Could not install " |
d4a53d58 | 2017 | "translated LSA, Id %s", |
5db95bc2 | 2018 | inet_ntoa (type7->data->id)); |
d4a53d58 | 2019 | return NULL; |
2020 | } | |
2021 | ||
2022 | /* Flood LSA through area. */ | |
2023 | ospf_flood_through_as (ospf, NULL, new); | |
2024 | ||
2025 | return new; | |
718e3744 | 2026 | } |
718e3744 | 2027 | |
2028 | int | |
2029 | is_prefix_default (struct prefix_ipv4 *p) | |
2030 | { | |
2031 | struct prefix_ipv4 q; | |
2032 | ||
2033 | q.family = AF_INET; | |
2034 | q.prefix.s_addr = 0; | |
2035 | q.prefixlen = 0; | |
2036 | ||
2037 | return prefix_same ((struct prefix *) p, (struct prefix *) &q); | |
2038 | } | |
2039 | ||
2040 | /* Originate an AS-external-LSA, install and flood. */ | |
2041 | struct ospf_lsa * | |
68980084 | 2042 | ospf_external_lsa_originate (struct ospf *ospf, struct external_info *ei) |
718e3744 | 2043 | { |
2044 | struct ospf_lsa *new; | |
2045 | ||
2046 | /* Added for NSSA project.... | |
2047 | ||
2048 | External LSAs are originated in ASBRs as usual, but for NSSA systems. | |
2049 | there is the global Type-5 LSDB and a Type-7 LSDB installed for | |
2050 | every area. The Type-7's are flooded to every IR and every ABR; We | |
2051 | install the Type-5 LSDB so that the normal "refresh" code operates | |
2052 | as usual, and flag them as not used during ASE calculations. The | |
2053 | Type-7 LSDB is used for calculations. Each Type-7 has a Forwarding | |
2054 | Address of non-zero. | |
2055 | ||
2056 | If an ABR is the elected NSSA translator, following SPF and during | |
2057 | the ABR task it will translate all the scanned Type-7's, with P-bit | |
2058 | ON and not-self generated, and translate to Type-5's throughout the | |
2059 | non-NSSA/STUB AS. | |
2060 | ||
2061 | A difference in operation depends whether this ASBR is an ABR | |
2062 | or not. If not an ABR, the P-bit is ON, to indicate that any | |
2063 | elected NSSA-ABR can perform its translation. | |
2064 | ||
2065 | If an ABR, the P-bit is OFF; No ABR will perform translation and | |
2066 | this ASBR will flood the Type-5 LSA as usual. | |
2067 | ||
2068 | For the case where this ASBR is not an ABR, the ASE calculations | |
2069 | are based on the Type-5 LSDB; The Type-7 LSDB exists just to | |
2070 | demonstrate to the user that there are LSA's that belong to any | |
2071 | attached NSSA. | |
2072 | ||
2073 | Finally, it just so happens that when the ABR is translating every | |
2074 | Type-7 into Type-5, it installs it into the Type-5 LSDB as an | |
2075 | approved Type-5 (translated from Type-7); at the end of translation | |
2076 | if any Translated Type-5's remain unapproved, then they must be | |
2077 | flushed from the AS. | |
2078 | ||
2079 | */ | |
2080 | ||
2081 | /* Check the AS-external-LSA should be originated. */ | |
68980084 | 2082 | if (!ospf_redistribute_check (ospf, ei, NULL)) |
718e3744 | 2083 | return NULL; |
2084 | ||
2085 | /* Create new AS-external-LSA instance. */ | |
68980084 | 2086 | if ((new = ospf_external_lsa_new (ospf, ei, NULL)) == NULL) |
718e3744 | 2087 | { |
2088 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2089 | zlog_debug ("LSA[Type5:%s]: Could not originate AS-external-LSA", |
718e3744 | 2090 | inet_ntoa (ei->p.prefix)); |
2091 | return NULL; | |
2092 | } | |
2093 | ||
2094 | /* Install newly created LSA into Type-5 LSDB, lock = 1. */ | |
68980084 | 2095 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 2096 | |
2097 | /* Update LSA origination count. */ | |
68980084 | 2098 | ospf->lsa_originate_count++; |
718e3744 | 2099 | |
2100 | /* Flooding new LSA. only to AS (non-NSSA/STUB) */ | |
68980084 | 2101 | ospf_flood_through_as (ospf, NULL, new); |
718e3744 | 2102 | |
718e3744 | 2103 | /* If there is any attached NSSA, do special handling */ |
d4a53d58 | 2104 | if (ospf->anyNSSA && |
2105 | /* stay away from translated LSAs! */ | |
2106 | !(CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT))) | |
68980084 | 2107 | ospf_install_flood_nssa (ospf, new, ei); /* Install/Flood Type-7 to all NSSAs */ |
718e3744 | 2108 | |
2109 | /* Debug logging. */ | |
2110 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2111 | { | |
e588f21f | 2112 | zlog_debug ("LSA[Type%d:%s]: Originate AS-external-LSA %p", |
718e3744 | 2113 | new->data->type, inet_ntoa (new->data->id), new); |
2114 | ospf_lsa_header_dump (new->data); | |
2115 | } | |
2116 | ||
2117 | return new; | |
2118 | } | |
2119 | ||
2120 | /* Originate AS-external-LSA from external info with initial flag. */ | |
2121 | int | |
68980084 | 2122 | ospf_external_lsa_originate_timer (struct thread *thread) |
718e3744 | 2123 | { |
68980084 | 2124 | struct ospf *ospf = THREAD_ARG (thread); |
718e3744 | 2125 | struct route_node *rn; |
2126 | struct external_info *ei; | |
2127 | struct route_table *rt; | |
68980084 | 2128 | int type = THREAD_VAL (thread); |
7c8ff89e DS |
2129 | struct list *ext_list; |
2130 | struct listnode *node; | |
2131 | struct ospf_external *ext; | |
718e3744 | 2132 | |
68980084 | 2133 | ospf->t_external_lsa = NULL; |
718e3744 | 2134 | |
7c8ff89e DS |
2135 | ext_list = om->external[type]; |
2136 | if (!ext_list) | |
2137 | return 0; | |
2138 | ||
2139 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) | |
2140 | /* Originate As-external-LSA from all type of distribute source. */ | |
2141 | if ((rt = ext->external_info)) | |
2142 | for (rn = route_top (rt); rn; rn = route_next (rn)) | |
2143 | if ((ei = rn->info) != NULL) | |
2144 | if (!is_prefix_default ((struct prefix_ipv4 *)&ei->p)) | |
2145 | if (!ospf_external_lsa_originate (ospf, ei)) | |
2146 | zlog_warn ("LSA: AS-external-LSA was not originated."); | |
2147 | ||
718e3744 | 2148 | return 0; |
2149 | } | |
2150 | ||
4dadc291 | 2151 | static struct external_info * |
020709f9 | 2152 | ospf_default_external_info (struct ospf *ospf) |
718e3744 | 2153 | { |
2154 | int type; | |
2155 | struct route_node *rn; | |
2156 | struct prefix_ipv4 p; | |
2157 | ||
2158 | p.family = AF_INET; | |
2159 | p.prefix.s_addr = 0; | |
2160 | p.prefixlen = 0; | |
2161 | ||
2162 | /* First, lookup redistributed default route. */ | |
2163 | for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) | |
7c8ff89e DS |
2164 | { |
2165 | struct list *ext_list; | |
2166 | struct listnode *node; | |
2167 | struct ospf_external *ext; | |
2168 | ||
2169 | if (type == ZEBRA_ROUTE_OSPF) | |
2170 | continue; | |
2171 | ||
2172 | ext_list = om->external[type]; | |
2173 | if (!ext_list) | |
2174 | continue; | |
2175 | ||
2176 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) | |
2177 | { | |
2178 | rn = route_node_lookup (ext->external_info, (struct prefix *) &p); | |
2179 | if (rn != NULL) | |
2180 | { | |
2181 | route_unlock_node (rn); | |
2182 | assert (rn->info); | |
2183 | if (ospf_redistribute_check (ospf, rn->info, NULL)) | |
2184 | return rn->info; | |
2185 | } | |
2186 | } | |
2187 | } | |
718e3744 | 2188 | |
2189 | return NULL; | |
2190 | } | |
2191 | ||
2192 | int | |
68980084 | 2193 | ospf_default_originate_timer (struct thread *thread) |
718e3744 | 2194 | { |
718e3744 | 2195 | struct prefix_ipv4 p; |
2196 | struct in_addr nexthop; | |
2197 | struct external_info *ei; | |
020709f9 | 2198 | struct ospf *ospf; |
718e3744 | 2199 | |
4021b60a | 2200 | ospf = THREAD_ARG (thread); |
718e3744 | 2201 | |
2202 | p.family = AF_INET; | |
2203 | p.prefix.s_addr = 0; | |
2204 | p.prefixlen = 0; | |
2205 | ||
4021b60a | 2206 | if (ospf->default_originate == DEFAULT_ORIGINATE_ALWAYS) |
718e3744 | 2207 | { |
2208 | /* If there is no default route via redistribute, | |
2209 | then originate AS-external-LSA with nexthop 0 (self). */ | |
2210 | nexthop.s_addr = 0; | |
7c8ff89e | 2211 | ospf_external_info_add (DEFAULT_ROUTE, 0, p, 0, nexthop, 0); |
718e3744 | 2212 | } |
2213 | ||
020709f9 | 2214 | if ((ei = ospf_default_external_info (ospf))) |
68980084 | 2215 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2216 | |
2217 | return 0; | |
2218 | } | |
2219 | ||
645878f1 | 2220 | /* Flush any NSSA LSAs for given prefix */ |
2221 | void | |
2222 | ospf_nssa_lsa_flush (struct ospf *ospf, struct prefix_ipv4 *p) | |
2223 | { | |
1eb8ef25 | 2224 | struct listnode *node, *nnode; |
645878f1 | 2225 | struct ospf_lsa *lsa; |
2226 | struct ospf_area *area; | |
2227 | ||
1eb8ef25 | 2228 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
645878f1 | 2229 | { |
1eb8ef25 | 2230 | if (area->external_routing == OSPF_AREA_NSSA) |
d748032f | 2231 | { |
2232 | if (!(lsa = ospf_lsa_lookup (area, OSPF_AS_NSSA_LSA, p->prefix, | |
2233 | ospf->router_id))) | |
2234 | { | |
2235 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2236 | zlog_debug ("LSA: There is no such AS-NSSA-LSA %s/%d in LSDB", |
d748032f | 2237 | inet_ntoa (p->prefix), p->prefixlen); |
2238 | continue; | |
2239 | } | |
2240 | ospf_ls_retransmit_delete_nbr_area (area, lsa); | |
2241 | if (!IS_LSA_MAXAGE (lsa)) | |
2242 | { | |
2243 | ospf_refresher_unregister_lsa (ospf, lsa); | |
2244 | ospf_lsa_flush_area (lsa, area); | |
2245 | } | |
2246 | } | |
645878f1 | 2247 | } |
2248 | } | |
645878f1 | 2249 | |
718e3744 | 2250 | /* Flush an AS-external-LSA from LSDB and routing domain. */ |
2251 | void | |
68980084 | 2252 | ospf_external_lsa_flush (struct ospf *ospf, |
2253 | u_char type, struct prefix_ipv4 *p, | |
5339cfdb | 2254 | unsigned int ifindex /*, struct in_addr nexthop */) |
718e3744 | 2255 | { |
2256 | struct ospf_lsa *lsa; | |
2257 | ||
2258 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2259 | zlog_debug ("LSA: Flushing AS-external-LSA %s/%d", |
718e3744 | 2260 | inet_ntoa (p->prefix), p->prefixlen); |
2261 | ||
2262 | /* First lookup LSA from LSDB. */ | |
68980084 | 2263 | if (!(lsa = ospf_external_info_find_lsa (ospf, p))) |
718e3744 | 2264 | { |
2265 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2266 | zlog_debug ("LSA: There is no such AS-external-LSA %s/%d in LSDB", |
718e3744 | 2267 | inet_ntoa (p->prefix), p->prefixlen); |
2268 | return; | |
2269 | } | |
beebba75 | 2270 | |
d4a53d58 | 2271 | /* If LSA is selforiginated, not a translated LSA, and there is |
2272 | * NSSA area, flush Type-7 LSA's at first. | |
2273 | */ | |
2274 | if (IS_LSA_SELF(lsa) && (ospf->anyNSSA) | |
2275 | && !(CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT))) | |
d748032f | 2276 | ospf_nssa_lsa_flush (ospf, p); |
718e3744 | 2277 | |
2278 | /* Sweep LSA from Link State Retransmit List. */ | |
68980084 | 2279 | ospf_ls_retransmit_delete_nbr_as (ospf, lsa); |
718e3744 | 2280 | |
2281 | /* There must be no self-originated LSA in rtrs_external. */ | |
2282 | #if 0 | |
2283 | /* Remove External route from Zebra. */ | |
2284 | ospf_zebra_delete ((struct prefix_ipv4 *) p, &nexthop); | |
2285 | #endif | |
2286 | ||
2287 | if (!IS_LSA_MAXAGE (lsa)) | |
2288 | { | |
2289 | /* Unregister LSA from Refresh queue. */ | |
68980084 | 2290 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 2291 | |
2292 | /* Flush AS-external-LSA through AS. */ | |
68980084 | 2293 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 2294 | } |
2295 | ||
2296 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2297 | zlog_debug ("ospf_external_lsa_flush(): stop"); |
718e3744 | 2298 | } |
2299 | ||
2300 | void | |
68980084 | 2301 | ospf_external_lsa_refresh_default (struct ospf *ospf) |
718e3744 | 2302 | { |
2303 | struct prefix_ipv4 p; | |
2304 | struct external_info *ei; | |
2305 | struct ospf_lsa *lsa; | |
2306 | ||
2307 | p.family = AF_INET; | |
2308 | p.prefixlen = 0; | |
2309 | p.prefix.s_addr = 0; | |
2310 | ||
020709f9 | 2311 | ei = ospf_default_external_info (ospf); |
68980084 | 2312 | lsa = ospf_external_info_find_lsa (ospf, &p); |
718e3744 | 2313 | |
2314 | if (ei) | |
2315 | { | |
2316 | if (lsa) | |
2317 | { | |
2318 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2319 | zlog_debug ("LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p", lsa); |
68980084 | 2320 | ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_FORCE); |
718e3744 | 2321 | } |
2322 | else | |
2323 | { | |
2324 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2325 | zlog_debug ("LSA[Type5:0.0.0.0]: Originate AS-external-LSA"); |
68980084 | 2326 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2327 | } |
2328 | } | |
2329 | else | |
2330 | { | |
2331 | if (lsa) | |
2332 | { | |
2333 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2334 | zlog_debug ("LSA[Type5:0.0.0.0]: Flush AS-external-LSA"); |
dfbd5176 | 2335 | ospf_refresher_unregister_lsa (ospf, lsa); |
68980084 | 2336 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 2337 | } |
2338 | } | |
2339 | } | |
2340 | ||
2341 | void | |
7c8ff89e DS |
2342 | ospf_external_lsa_refresh_type (struct ospf *ospf, u_char type, u_short instance, |
2343 | int force) | |
718e3744 | 2344 | { |
2345 | struct route_node *rn; | |
2346 | struct external_info *ei; | |
7c8ff89e | 2347 | struct ospf_external *ext; |
718e3744 | 2348 | |
2349 | if (type != DEFAULT_ROUTE) | |
7c8ff89e DS |
2350 | if ((ext = ospf_external_lookup(type, instance)) && |
2351 | EXTERNAL_INFO (ext)) | |
718e3744 | 2352 | /* Refresh each redistributed AS-external-LSAs. */ |
7c8ff89e | 2353 | for (rn = route_top (EXTERNAL_INFO (ext)); rn; rn = route_next (rn)) |
718e3744 | 2354 | if ((ei = rn->info)) |
2355 | if (!is_prefix_default (&ei->p)) | |
2356 | { | |
2357 | struct ospf_lsa *lsa; | |
2358 | ||
68980084 | 2359 | if ((lsa = ospf_external_info_find_lsa (ospf, &ei->p))) |
2360 | ospf_external_lsa_refresh (ospf, lsa, ei, force); | |
718e3744 | 2361 | else |
68980084 | 2362 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2363 | } |
2364 | } | |
2365 | ||
2366 | /* Refresh AS-external-LSA. */ | |
c363d386 | 2367 | struct ospf_lsa * |
68980084 | 2368 | ospf_external_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa, |
718e3744 | 2369 | struct external_info *ei, int force) |
2370 | { | |
2371 | struct ospf_lsa *new; | |
2372 | int changed; | |
2373 | ||
2374 | /* Check the AS-external-LSA should be originated. */ | |
68980084 | 2375 | if (!ospf_redistribute_check (ospf, ei, &changed)) |
718e3744 | 2376 | { |
d4a53d58 | 2377 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 2378 | zlog_debug ("LSA[Type%d:%s]: Could not be refreshed, " |
d4a53d58 | 2379 | "redist check fail", |
2380 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
68980084 | 2381 | ospf_external_lsa_flush (ospf, ei->type, &ei->p, |
5339cfdb | 2382 | ei->ifindex /*, ei->nexthop */); |
c363d386 | 2383 | return NULL; |
718e3744 | 2384 | } |
2385 | ||
2386 | if (!changed && !force) | |
d4a53d58 | 2387 | { |
2388 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 2389 | zlog_debug ("LSA[Type%d:%s]: Not refreshed, not changed/forced", |
d4a53d58 | 2390 | lsa->data->type, inet_ntoa (lsa->data->id)); |
c363d386 | 2391 | return NULL; |
d4a53d58 | 2392 | } |
718e3744 | 2393 | |
2394 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 2395 | ospf_ls_retransmit_delete_nbr_as (ospf, lsa); |
718e3744 | 2396 | |
2397 | /* Unregister AS-external-LSA from refresh-list. */ | |
68980084 | 2398 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 2399 | |
68980084 | 2400 | new = ospf_external_lsa_new (ospf, ei, &lsa->data->id); |
718e3744 | 2401 | |
2402 | if (new == NULL) | |
2403 | { | |
2404 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 2405 | zlog_debug ("LSA[Type%d:%s]: Could not be refreshed", lsa->data->type, |
718e3744 | 2406 | inet_ntoa (lsa->data->id)); |
c363d386 | 2407 | return NULL; |
718e3744 | 2408 | } |
2409 | ||
2410 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
2411 | ||
68980084 | 2412 | ospf_lsa_install (ospf, NULL, new); /* As type-5. */ |
718e3744 | 2413 | |
2414 | /* Flood LSA through AS. */ | |
68980084 | 2415 | ospf_flood_through_as (ospf, NULL, new); |
718e3744 | 2416 | |
718e3744 | 2417 | /* If any attached NSSA, install as Type-7, flood to all NSSA Areas */ |
d4a53d58 | 2418 | if (ospf->anyNSSA && !(CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT))) |
68980084 | 2419 | ospf_install_flood_nssa (ospf, new, ei); /* Install/Flood per new rules */ |
718e3744 | 2420 | |
d4a53d58 | 2421 | /* Register self-originated LSA to refresh queue. |
2422 | * Translated LSAs should not be registered, but refreshed upon | |
2423 | * refresh of the Type-7 | |
2424 | */ | |
2425 | if ( !CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT) ) | |
2426 | ospf_refresher_register_lsa (ospf, new); | |
718e3744 | 2427 | |
2428 | /* Debug logging. */ | |
2429 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2430 | { | |
e588f21f | 2431 | zlog_debug ("LSA[Type%d:%s]: AS-external-LSA refresh", |
d4a53d58 | 2432 | new->data->type, inet_ntoa (new->data->id)); |
718e3744 | 2433 | ospf_lsa_header_dump (new->data); |
2434 | } | |
2435 | ||
c363d386 | 2436 | return new; |
718e3744 | 2437 | } |
2438 | ||
6b0655a2 | 2439 | |
718e3744 | 2440 | /* LSA installation functions. */ |
2441 | ||
2442 | /* Install router-LSA to an area. */ | |
4dadc291 | 2443 | static struct ospf_lsa * |
c363d386 PJ |
2444 | ospf_router_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2445 | int rt_recalc) | |
718e3744 | 2446 | { |
2447 | struct ospf_area *area = new->area; | |
2448 | ||
2449 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2450 | The entire routing table must be recalculated, starting with | |
2451 | the shortest path calculations for each area (not just the | |
2452 | area whose link-state database has changed). | |
2453 | */ | |
718e3744 | 2454 | |
5996e0df | 2455 | if (IS_LSA_SELF (new)) |
718e3744 | 2456 | { |
5996e0df JT |
2457 | |
2458 | /* Only install LSA if it is originated/refreshed by us. | |
2459 | * If LSA was received by flooding, the RECEIVED flag is set so do | |
2460 | * not link the LSA */ | |
2461 | if (CHECK_FLAG (new->flags, OSPF_LSA_RECEIVED)) | |
2462 | return new; /* ignore stale LSA */ | |
2463 | ||
718e3744 | 2464 | /* Set self-originated router-LSA. */ |
1fe6ed38 | 2465 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 2466 | area->router_lsa_self = ospf_lsa_lock (new); |
2467 | ||
c363d386 | 2468 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2469 | } |
5996e0df | 2470 | if (rt_recalc) |
cf744958 DS |
2471 | { |
2472 | ospf_flag_spf_reason (SPF_FLAG_ROUTER_LSA_INSTALL); | |
2473 | ospf_spf_calculate_schedule (ospf); | |
2474 | } | |
718e3744 | 2475 | return new; |
2476 | } | |
2477 | ||
2478 | #define OSPF_INTERFACE_TIMER_ON(T,F,V) \ | |
2479 | if (!(T)) \ | |
2480 | (T) = thread_add_timer (master, (F), oi, (V)) | |
2481 | ||
2482 | /* Install network-LSA to an area. */ | |
4dadc291 | 2483 | static struct ospf_lsa * |
68980084 | 2484 | ospf_network_lsa_install (struct ospf *ospf, |
2485 | struct ospf_interface *oi, | |
718e3744 | 2486 | struct ospf_lsa *new, |
2487 | int rt_recalc) | |
2488 | { | |
2489 | ||
2490 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2491 | The entire routing table must be recalculated, starting with | |
2492 | the shortest path calculations for each area (not just the | |
2493 | area whose link-state database has changed). | |
2494 | */ | |
5996e0df | 2495 | if (IS_LSA_SELF (new)) |
718e3744 | 2496 | { |
5996e0df JT |
2497 | /* We supposed that when LSA is originated by us, we pass the int |
2498 | for which it was originated. If LSA was received by flooding, | |
2499 | the RECEIVED flag is set, so we do not link the LSA to the int. */ | |
2500 | if (CHECK_FLAG (new->flags, OSPF_LSA_RECEIVED)) | |
2501 | return new; /* ignore stale LSA */ | |
2502 | ||
1fe6ed38 | 2503 | ospf_lsa_unlock (&oi->network_lsa_self); |
718e3744 | 2504 | oi->network_lsa_self = ospf_lsa_lock (new); |
c363d386 | 2505 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2506 | } |
5996e0df | 2507 | if (rt_recalc) |
cf744958 DS |
2508 | { |
2509 | ospf_flag_spf_reason (SPF_FLAG_NETWORK_LSA_INSTALL); | |
2510 | ospf_spf_calculate_schedule (ospf); | |
2511 | } | |
718e3744 | 2512 | |
2513 | return new; | |
2514 | } | |
2515 | ||
2516 | /* Install summary-LSA to an area. */ | |
4dadc291 | 2517 | static struct ospf_lsa * |
68980084 | 2518 | ospf_summary_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2519 | int rt_recalc) | |
718e3744 | 2520 | { |
718e3744 | 2521 | if (rt_recalc && !IS_LSA_SELF (new)) |
2522 | { | |
2523 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2524 | The best route to the destination described by the summary- | |
2525 | LSA must be recalculated (see Section 16.5). If this | |
2526 | destination is an AS boundary router, it may also be | |
2527 | necessary to re-examine all the AS-external-LSAs. | |
2528 | */ | |
2529 | ||
2530 | #if 0 | |
2531 | /* This doesn't exist yet... */ | |
2532 | ospf_summary_incremental_update(new); */ | |
2533 | #else /* #if 0 */ | |
cf744958 | 2534 | ospf_flag_spf_reason (SPF_FLAG_SUMMARY_LSA_INSTALL); |
68980084 | 2535 | ospf_spf_calculate_schedule (ospf); |
718e3744 | 2536 | #endif /* #if 0 */ |
2537 | ||
718e3744 | 2538 | } |
2539 | ||
2540 | if (IS_LSA_SELF (new)) | |
68980084 | 2541 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2542 | |
2543 | return new; | |
2544 | } | |
2545 | ||
2546 | /* Install ASBR-summary-LSA to an area. */ | |
4dadc291 | 2547 | static struct ospf_lsa * |
68980084 | 2548 | ospf_summary_asbr_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2549 | int rt_recalc) | |
718e3744 | 2550 | { |
2551 | if (rt_recalc && !IS_LSA_SELF (new)) | |
2552 | { | |
2553 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2554 | The best route to the destination described by the summary- | |
2555 | LSA must be recalculated (see Section 16.5). If this | |
2556 | destination is an AS boundary router, it may also be | |
2557 | necessary to re-examine all the AS-external-LSAs. | |
2558 | */ | |
2559 | #if 0 | |
2560 | /* These don't exist yet... */ | |
2561 | ospf_summary_incremental_update(new); | |
2562 | /* Isn't this done by the above call? | |
2563 | - RFC 2328 Section 16.5 implies it should be */ | |
2564 | /* ospf_ase_calculate_schedule(); */ | |
2565 | #else /* #if 0 */ | |
cf744958 | 2566 | ospf_flag_spf_reason (SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL); |
68980084 | 2567 | ospf_spf_calculate_schedule (ospf); |
718e3744 | 2568 | #endif /* #if 0 */ |
2569 | } | |
2570 | ||
2571 | /* register LSA to refresh-list. */ | |
2572 | if (IS_LSA_SELF (new)) | |
68980084 | 2573 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2574 | |
2575 | return new; | |
2576 | } | |
2577 | ||
2578 | /* Install AS-external-LSA. */ | |
4dadc291 | 2579 | static struct ospf_lsa * |
68980084 | 2580 | ospf_external_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2581 | int rt_recalc) | |
718e3744 | 2582 | { |
68980084 | 2583 | ospf_ase_register_external_lsa (new, ospf); |
718e3744 | 2584 | /* If LSA is not self-originated, calculate an external route. */ |
2585 | if (rt_recalc) | |
2586 | { | |
2587 | /* RFC 2328 Section 13.2 AS-external-LSAs | |
2588 | The best route to the destination described by the AS- | |
2589 | external-LSA must be recalculated (see Section 16.6). | |
2590 | */ | |
2591 | ||
2592 | if (!IS_LSA_SELF (new)) | |
d4a53d58 | 2593 | ospf_ase_incremental_update (ospf, new); |
718e3744 | 2594 | } |
2595 | ||
d4a53d58 | 2596 | if (new->data->type == OSPF_AS_NSSA_LSA) |
2597 | { | |
2598 | /* There is no point to register selforiginate Type-7 LSA for | |
2599 | * refreshing. We rely on refreshing Type-5 LSA's | |
2600 | */ | |
2601 | if (IS_LSA_SELF (new)) | |
2602 | return new; | |
2603 | else | |
2604 | { | |
2605 | /* Try refresh type-5 translated LSA for this LSA, if one exists. | |
2606 | * New translations will be taken care of by the abr_task. | |
2607 | */ | |
2608 | ospf_translated_nssa_refresh (ospf, new, NULL); | |
2609 | } | |
2610 | } | |
d748032f | 2611 | |
d4a53d58 | 2612 | /* Register self-originated LSA to refresh queue. |
8fc0f64b | 2613 | * Leave Translated LSAs alone if NSSA is enabled |
d4a53d58 | 2614 | */ |
beebba75 | 2615 | if (IS_LSA_SELF (new) && !CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT ) ) |
68980084 | 2616 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2617 | |
2618 | return new; | |
2619 | } | |
2620 | ||
2621 | void | |
68980084 | 2622 | ospf_discard_from_db (struct ospf *ospf, |
2623 | struct ospf_lsdb *lsdb, struct ospf_lsa *lsa) | |
718e3744 | 2624 | { |
2625 | struct ospf_lsa *old; | |
2626 | ||
ac904dec PJ |
2627 | if (!lsdb) |
2628 | { | |
2629 | zlog_warn ("%s: Called with NULL lsdb!", __func__); | |
2630 | if (!lsa) | |
2631 | zlog_warn ("%s: and NULL LSA!", __func__); | |
2632 | else | |
2633 | zlog_warn ("LSA[Type%d:%s]: not associated with LSDB!", | |
2634 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
2635 | return; | |
2636 | } | |
2637 | ||
718e3744 | 2638 | old = ospf_lsdb_lookup (lsdb, lsa); |
2639 | ||
2640 | if (!old) | |
2641 | return; | |
2642 | ||
2643 | if (old->refresh_list >= 0) | |
68980084 | 2644 | ospf_refresher_unregister_lsa (ospf, old); |
718e3744 | 2645 | |
2646 | switch (old->data->type) | |
2647 | { | |
2648 | case OSPF_AS_EXTERNAL_LSA: | |
69310a67 | 2649 | ospf_ase_unregister_external_lsa (old, ospf); |
2650 | ospf_ls_retransmit_delete_nbr_as (ospf, old); | |
2651 | break; | |
718e3744 | 2652 | #ifdef HAVE_OPAQUE_LSA |
2653 | case OSPF_OPAQUE_AS_LSA: | |
68980084 | 2654 | ospf_ls_retransmit_delete_nbr_as (ospf, old); |
718e3744 | 2655 | break; |
69310a67 | 2656 | #endif /* HAVE_OPAQUE_LSA */ |
d748032f | 2657 | case OSPF_AS_NSSA_LSA: |
2658 | ospf_ls_retransmit_delete_nbr_area (old->area, old); | |
2659 | ospf_ase_unregister_external_lsa (old, ospf); | |
beebba75 | 2660 | break; |
718e3744 | 2661 | default: |
68980084 | 2662 | ospf_ls_retransmit_delete_nbr_area (old->area, old); |
718e3744 | 2663 | break; |
2664 | } | |
2665 | ||
68980084 | 2666 | ospf_lsa_maxage_delete (ospf, old); |
718e3744 | 2667 | ospf_lsa_discard (old); |
2668 | } | |
2669 | ||
718e3744 | 2670 | struct ospf_lsa * |
68980084 | 2671 | ospf_lsa_install (struct ospf *ospf, struct ospf_interface *oi, |
2672 | struct ospf_lsa *lsa) | |
718e3744 | 2673 | { |
2674 | struct ospf_lsa *new = NULL; | |
2675 | struct ospf_lsa *old = NULL; | |
2676 | struct ospf_lsdb *lsdb = NULL; | |
2677 | int rt_recalc; | |
2678 | ||
2679 | /* Set LSDB. */ | |
2680 | switch (lsa->data->type) | |
2681 | { | |
f2c80652 | 2682 | /* kevinm */ |
2683 | case OSPF_AS_NSSA_LSA: | |
2684 | if (lsa->area) | |
2685 | lsdb = lsa->area->lsdb; | |
2686 | else | |
68980084 | 2687 | lsdb = ospf->lsdb; |
f2c80652 | 2688 | break; |
718e3744 | 2689 | case OSPF_AS_EXTERNAL_LSA: |
2690 | #ifdef HAVE_OPAQUE_LSA | |
2691 | case OSPF_OPAQUE_AS_LSA: | |
2692 | #endif /* HAVE_OPAQUE_LSA */ | |
68980084 | 2693 | lsdb = ospf->lsdb; |
718e3744 | 2694 | break; |
2695 | default: | |
2696 | lsdb = lsa->area->lsdb; | |
2697 | break; | |
2698 | } | |
2699 | ||
718e3744 | 2700 | assert (lsdb); |
2701 | ||
2702 | /* RFC 2328 13.2. Installing LSAs in the database | |
2703 | ||
2704 | Installing a new LSA in the database, either as the result of | |
2705 | flooding or a newly self-originated LSA, may cause the OSPF | |
2706 | routing table structure to be recalculated. The contents of the | |
2707 | new LSA should be compared to the old instance, if present. If | |
2708 | there is no difference, there is no need to recalculate the | |
2709 | routing table. When comparing an LSA to its previous instance, | |
2710 | the following are all considered to be differences in contents: | |
2711 | ||
2712 | o The LSA's Options field has changed. | |
2713 | ||
2714 | o One of the LSA instances has LS age set to MaxAge, and | |
2715 | the other does not. | |
2716 | ||
2717 | o The length field in the LSA header has changed. | |
2718 | ||
2719 | o The body of the LSA (i.e., anything outside the 20-byte | |
2720 | LSA header) has changed. Note that this excludes changes | |
2721 | in LS Sequence Number and LS Checksum. | |
2722 | ||
2723 | */ | |
2724 | /* Look up old LSA and determine if any SPF calculation or incremental | |
2725 | update is needed */ | |
2726 | old = ospf_lsdb_lookup (lsdb, lsa); | |
2727 | ||
2728 | /* Do comparision and record if recalc needed. */ | |
2729 | rt_recalc = 0; | |
2730 | if ( old == NULL || ospf_lsa_different(old, lsa)) | |
2731 | rt_recalc = 1; | |
2732 | ||
7ddf1d6e | 2733 | /* |
2734 | Sequence number check (Section 14.1 of rfc 2328) | |
2735 | "Premature aging is used when it is time for a self-originated | |
2736 | LSA's sequence number field to wrap. At this point, the current | |
2737 | LSA instance (having LS sequence number MaxSequenceNumber) must | |
2738 | be prematurely aged and flushed from the routing domain before a | |
2739 | new instance with sequence number equal to InitialSequenceNumber | |
2740 | can be originated. " | |
2741 | */ | |
2742 | ||
c2b478d7 | 2743 | if (ntohl(lsa->data->ls_seqnum) - 1 == OSPF_MAX_SEQUENCE_NUMBER) |
7ddf1d6e | 2744 | { |
2745 | if (ospf_lsa_is_self_originated(ospf, lsa)) | |
2746 | { | |
0c2be26c | 2747 | lsa->data->ls_seqnum = htonl(OSPF_MAX_SEQUENCE_NUMBER); |
2748 | ||
2749 | if (!IS_LSA_MAXAGE(lsa)) | |
7ddf1d6e | 2750 | lsa->flags |= OSPF_LSA_PREMATURE_AGE; |
2751 | lsa->data->ls_age = htons (OSPF_LSA_MAXAGE); | |
2752 | ||
2753 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
2754 | { | |
e588f21f | 2755 | zlog_debug ("ospf_lsa_install() Premature Aging " |
c363d386 PJ |
2756 | "lsa 0x%p, seqnum 0x%x", |
2757 | lsa, ntohl(lsa->data->ls_seqnum)); | |
7ddf1d6e | 2758 | ospf_lsa_header_dump (lsa->data); |
2759 | } | |
2760 | } | |
2761 | else | |
2762 | { | |
2763 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2764 | { | |
e588f21f | 2765 | zlog_debug ("ospf_lsa_install() got an lsa with seq 0x80000000 " |
7ddf1d6e | 2766 | "that was not self originated. Ignoring\n"); |
2767 | ospf_lsa_header_dump (lsa->data); | |
2768 | } | |
2769 | return old; | |
2770 | } | |
2771 | } | |
2772 | ||
718e3744 | 2773 | /* discard old LSA from LSDB */ |
2774 | if (old != NULL) | |
68980084 | 2775 | ospf_discard_from_db (ospf, lsdb, lsa); |
718e3744 | 2776 | |
718e3744 | 2777 | /* Calculate Checksum if self-originated?. */ |
2778 | if (IS_LSA_SELF (lsa)) | |
2779 | ospf_lsa_checksum (lsa->data); | |
2780 | ||
fe71a97d | 2781 | /* Insert LSA to LSDB. */ |
2782 | ospf_lsdb_add (lsdb, lsa); | |
2783 | lsa->lsdb = lsdb; | |
2784 | ||
718e3744 | 2785 | /* Do LSA specific installation process. */ |
2786 | switch (lsa->data->type) | |
2787 | { | |
2788 | case OSPF_ROUTER_LSA: | |
68980084 | 2789 | new = ospf_router_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2790 | break; |
2791 | case OSPF_NETWORK_LSA: | |
2792 | assert (oi); | |
68980084 | 2793 | new = ospf_network_lsa_install (ospf, oi, lsa, rt_recalc); |
718e3744 | 2794 | break; |
2795 | case OSPF_SUMMARY_LSA: | |
68980084 | 2796 | new = ospf_summary_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2797 | break; |
2798 | case OSPF_ASBR_SUMMARY_LSA: | |
68980084 | 2799 | new = ospf_summary_asbr_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2800 | break; |
2801 | case OSPF_AS_EXTERNAL_LSA: | |
68980084 | 2802 | new = ospf_external_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2803 | break; |
2804 | #ifdef HAVE_OPAQUE_LSA | |
2805 | case OSPF_OPAQUE_LINK_LSA: | |
09e4efdc | 2806 | if (IS_LSA_SELF (lsa)) |
68980084 | 2807 | lsa->oi = oi; /* Specify outgoing ospf-interface for this LSA. */ |
09e4efdc | 2808 | else |
0798cee3 AC |
2809 | { |
2810 | /* Incoming "oi" for this LSA has set at LSUpd reception. */ | |
2811 | } | |
09e4efdc | 2812 | /* Fallthrough */ |
718e3744 | 2813 | case OSPF_OPAQUE_AREA_LSA: |
2814 | case OSPF_OPAQUE_AS_LSA: | |
2815 | new = ospf_opaque_lsa_install (lsa, rt_recalc); | |
2816 | break; | |
2817 | #endif /* HAVE_OPAQUE_LSA */ | |
d4a53d58 | 2818 | case OSPF_AS_NSSA_LSA: |
68980084 | 2819 | new = ospf_external_lsa_install (ospf, lsa, rt_recalc); |
d4a53d58 | 2820 | default: /* type-6,8,9....nothing special */ |
718e3744 | 2821 | break; |
2822 | } | |
2823 | ||
2824 | if (new == NULL) | |
2825 | return new; /* Installation failed, cannot proceed further -- endo. */ | |
2826 | ||
2827 | /* Debug logs. */ | |
2828 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) | |
2829 | { | |
2830 | char area_str[INET_ADDRSTRLEN]; | |
2831 | ||
2832 | switch (lsa->data->type) | |
2833 | { | |
2834 | case OSPF_AS_EXTERNAL_LSA: | |
2835 | #ifdef HAVE_OPAQUE_LSA | |
2836 | case OSPF_OPAQUE_AS_LSA: | |
2837 | #endif /* HAVE_OPAQUE_LSA */ | |
beebba75 | 2838 | case OSPF_AS_NSSA_LSA: |
e588f21f | 2839 | zlog_debug ("LSA[%s]: Install %s", |
718e3744 | 2840 | dump_lsa_key (new), |
2841 | LOOKUP (ospf_lsa_type_msg, new->data->type)); | |
2842 | break; | |
2843 | default: | |
2844 | strcpy (area_str, inet_ntoa (new->area->area_id)); | |
e588f21f | 2845 | zlog_debug ("LSA[%s]: Install %s to Area %s", |
718e3744 | 2846 | dump_lsa_key (new), |
2847 | LOOKUP (ospf_lsa_type_msg, new->data->type), area_str); | |
2848 | break; | |
2849 | } | |
2850 | } | |
2851 | ||
7ddf1d6e | 2852 | /* |
2853 | If received LSA' ls_age is MaxAge, or lsa is being prematurely aged | |
2854 | (it's getting flushed out of the area), set LSA on MaxAge LSA list. | |
2855 | */ | |
e0630cb4 | 2856 | if (IS_LSA_MAXAGE (new)) |
718e3744 | 2857 | { |
7ddf1d6e | 2858 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) |
e588f21f | 2859 | zlog_debug ("LSA[Type%d:%s]: Install LSA 0x%p, MaxAge", |
0c2be26c | 2860 | new->data->type, |
2861 | inet_ntoa (new->data->id), | |
2862 | lsa); | |
e0630cb4 | 2863 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 2864 | } |
2865 | ||
2866 | return new; | |
2867 | } | |
2868 | ||
6b0655a2 | 2869 | |
4c14b7f6 | 2870 | int |
68980084 | 2871 | ospf_check_nbr_status (struct ospf *ospf) |
718e3744 | 2872 | { |
1eb8ef25 | 2873 | struct listnode *node, *nnode; |
2874 | struct ospf_interface *oi; | |
2875 | ||
2876 | for (ALL_LIST_ELEMENTS (ospf->oiflist, node, nnode, oi)) | |
718e3744 | 2877 | { |
718e3744 | 2878 | struct route_node *rn; |
2879 | struct ospf_neighbor *nbr; | |
2880 | ||
2881 | if (ospf_if_is_enable (oi)) | |
2882 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
2883 | if ((nbr = rn->info) != NULL) | |
2884 | if (nbr->state == NSM_Exchange || nbr->state == NSM_Loading) | |
2885 | { | |
2886 | route_unlock_node (rn); | |
2887 | return 0; | |
2888 | } | |
2889 | } | |
2890 | ||
2891 | return 1; | |
2892 | } | |
2893 | ||
6b0655a2 | 2894 | |
718e3744 | 2895 | |
4dadc291 | 2896 | static int |
718e3744 | 2897 | ospf_maxage_lsa_remover (struct thread *thread) |
2898 | { | |
68980084 | 2899 | struct ospf *ospf = THREAD_ARG (thread); |
1eb8ef25 | 2900 | struct ospf_lsa *lsa; |
91e6a0e5 | 2901 | struct route_node *rn; |
718e3744 | 2902 | int reschedule = 0; |
2903 | ||
68980084 | 2904 | ospf->t_maxage = NULL; |
718e3744 | 2905 | |
2906 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2907 | zlog_debug ("LSA[MaxAge]: remover Start"); |
718e3744 | 2908 | |
68980084 | 2909 | reschedule = !ospf_check_nbr_status (ospf); |
718e3744 | 2910 | |
2911 | if (!reschedule) | |
91e6a0e5 | 2912 | for (rn = route_top(ospf->maxage_lsa); rn; rn = route_next(rn)) |
718e3744 | 2913 | { |
91e6a0e5 DD |
2914 | if ((lsa = rn->info) == NULL) |
2915 | { | |
2916 | continue; | |
2917 | } | |
2918 | ||
4de8bf00 CF |
2919 | /* There is at least one neighbor from which we still await an ack |
2920 | * for that LSA, so we are not allowed to remove it from our lsdb yet | |
2921 | * as per RFC 2328 section 14 para 4 a) */ | |
718e3744 | 2922 | if (lsa->retransmit_counter > 0) |
2923 | { | |
2924 | reschedule = 1; | |
2925 | continue; | |
2926 | } | |
94b6bfd2 PJ |
2927 | |
2928 | /* TODO: maybe convert this function to a work-queue */ | |
2929 | if (thread_should_yield (thread)) | |
4de8bf00 CF |
2930 | { |
2931 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, 0); | |
e387dfd1 | 2932 | route_unlock_node(rn); /* route_top/route_next */ |
4de8bf00 CF |
2933 | return 0; |
2934 | } | |
94b6bfd2 | 2935 | |
718e3744 | 2936 | /* Remove LSA from the LSDB */ |
ce3cdcfb | 2937 | if (IS_LSA_SELF (lsa)) |
718e3744 | 2938 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) |
ad8d4802 | 2939 | zlog_debug ("LSA[Type%d:%s]: LSA 0x%lx is self-originated: ", |
7ddf1d6e | 2940 | lsa->data->type, inet_ntoa (lsa->data->id), (u_long)lsa); |
718e3744 | 2941 | |
2942 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2943 | zlog_debug ("LSA[Type%d:%s]: MaxAge LSA removed from list", |
718e3744 | 2944 | lsa->data->type, inet_ntoa (lsa->data->id)); |
2945 | ||
c363d386 | 2946 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_PREMATURE_AGE)) |
7ddf1d6e | 2947 | { |
2948 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
c363d386 PJ |
2949 | zlog_debug ("originating new lsa for lsa 0x%p\n", lsa); |
2950 | ospf_lsa_refresh (ospf, lsa); | |
7ddf1d6e | 2951 | } |
2952 | ||
718e3744 | 2953 | /* Remove from lsdb. */ |
ac904dec PJ |
2954 | if (lsa->lsdb) |
2955 | { | |
2956 | ospf_discard_from_db (ospf, lsa->lsdb, lsa); | |
2957 | ospf_lsdb_delete (lsa->lsdb, lsa); | |
2958 | } | |
2959 | else | |
2960 | zlog_warn ("%s: LSA[Type%d:%s]: No associated LSDB!", __func__, | |
2961 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
718e3744 | 2962 | } |
2963 | ||
2964 | /* A MaxAge LSA must be removed immediately from the router's link | |
2965 | state database as soon as both a) it is no longer contained on any | |
2966 | neighbor Link state retransmission lists and b) none of the router's | |
2967 | neighbors are in states Exchange or Loading. */ | |
2968 | if (reschedule) | |
02d942c9 PJ |
2969 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, |
2970 | ospf->maxage_delay); | |
718e3744 | 2971 | |
2972 | return 0; | |
2973 | } | |
2974 | ||
718e3744 | 2975 | void |
68980084 | 2976 | ospf_lsa_maxage_delete (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 2977 | { |
91e6a0e5 | 2978 | struct route_node *rn; |
b4b359a2 | 2979 | struct prefix_ptr lsa_prefix; |
718e3744 | 2980 | |
b4b359a2 PM |
2981 | lsa_prefix.family = 0; |
2982 | lsa_prefix.prefixlen = sizeof(lsa_prefix.prefix) * CHAR_BIT; | |
2983 | lsa_prefix.prefix = (uintptr_t) lsa; | |
91e6a0e5 DD |
2984 | |
2985 | if ((rn = route_node_lookup(ospf->maxage_lsa, | |
2986 | (struct prefix *)&lsa_prefix))) | |
718e3744 | 2987 | { |
91e6a0e5 DD |
2988 | if (rn->info == lsa) |
2989 | { | |
2990 | UNSET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); | |
2991 | ospf_lsa_unlock (&lsa); /* maxage_lsa */ | |
2992 | rn->info = NULL; | |
8afee5c1 | 2993 | route_unlock_node (rn); /* unlock node because lsa is deleted */ |
91e6a0e5 | 2994 | } |
8afee5c1 | 2995 | route_unlock_node (rn); /* route_node_lookup */ |
718e3744 | 2996 | } |
2997 | } | |
2998 | ||
02d942c9 PJ |
2999 | /* Add LSA onto the MaxAge list, and schedule for removal. |
3000 | * This does *not* lead to the LSA being flooded, that must be taken | |
3001 | * care of elsewhere, see, e.g., ospf_lsa_flush* (which are callers of this | |
3002 | * function). | |
3003 | */ | |
718e3744 | 3004 | void |
68980084 | 3005 | ospf_lsa_maxage (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3006 | { |
b4b359a2 | 3007 | struct prefix_ptr lsa_prefix; |
91e6a0e5 DD |
3008 | struct route_node *rn; |
3009 | ||
718e3744 | 3010 | /* When we saw a MaxAge LSA flooded to us, we put it on the list |
3011 | and schedule the MaxAge LSA remover. */ | |
3106a032 | 3012 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE)) |
718e3744 | 3013 | { |
3014 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 3015 | zlog_debug ("LSA[Type%d:%s]: %p already exists on MaxAge LSA list", |
718e3744 | 3016 | lsa->data->type, inet_ntoa (lsa->data->id), lsa); |
3017 | return; | |
3018 | } | |
3019 | ||
b4b359a2 PM |
3020 | lsa_prefix.family = 0; |
3021 | lsa_prefix.prefixlen = sizeof(lsa_prefix.prefix) * CHAR_BIT; | |
3022 | lsa_prefix.prefix = (uintptr_t) lsa; | |
3023 | ||
91e6a0e5 DD |
3024 | if ((rn = route_node_get (ospf->maxage_lsa, |
3025 | (struct prefix *)&lsa_prefix)) != NULL) | |
3026 | { | |
3027 | if (rn->info != NULL) | |
3028 | { | |
b4b359a2 PM |
3029 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) |
3030 | zlog_debug ("LSA[%s]: found LSA (%p) in table for LSA %p %d", | |
3031 | dump_lsa_key (lsa), rn->info, lsa, lsa_prefix.prefixlen); | |
91e6a0e5 DD |
3032 | route_unlock_node (rn); |
3033 | } | |
3034 | else | |
3035 | { | |
3036 | rn->info = ospf_lsa_lock(lsa); | |
3037 | SET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); | |
3038 | } | |
3039 | } | |
3040 | else | |
3041 | { | |
3042 | zlog_err("Unable to allocate memory for maxage lsa\n"); | |
3043 | assert(0); | |
3044 | } | |
718e3744 | 3045 | |
3046 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 3047 | zlog_debug ("LSA[%s]: MaxAge LSA remover scheduled.", dump_lsa_key (lsa)); |
718e3744 | 3048 | |
02d942c9 PJ |
3049 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, |
3050 | ospf->maxage_delay); | |
718e3744 | 3051 | } |
3052 | ||
4dadc291 | 3053 | static int |
68980084 | 3054 | ospf_lsa_maxage_walker_remover (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3055 | { |
718e3744 | 3056 | /* Stay away from any Local Translated Type-7 LSAs */ |
3057 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
3058 | return 0; | |
718e3744 | 3059 | |
3060 | if (IS_LSA_MAXAGE (lsa)) | |
3061 | /* Self-originated LSAs should NOT time-out instead, | |
3062 | they're flushed and submitted to the max_age list explicitly. */ | |
68980084 | 3063 | if (!ospf_lsa_is_self_originated (ospf, lsa)) |
718e3744 | 3064 | { |
3065 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 3066 | zlog_debug("LSA[%s]: is MaxAge", dump_lsa_key (lsa)); |
718e3744 | 3067 | |
3068 | switch (lsa->data->type) | |
3069 | { | |
718e3744 | 3070 | #ifdef HAVE_OPAQUE_LSA |
37163d6d | 3071 | case OSPF_OPAQUE_LINK_LSA: |
3072 | case OSPF_OPAQUE_AREA_LSA: | |
718e3744 | 3073 | case OSPF_OPAQUE_AS_LSA: |
09e4efdc | 3074 | /* |
3075 | * As a general rule, whenever network topology has changed | |
3076 | * (due to an LSA removal in this case), routing recalculation | |
3077 | * should be triggered. However, this is not true for opaque | |
3078 | * LSAs. Even if an opaque LSA instance is going to be removed | |
3079 | * from the routing domain, it does not mean a change in network | |
3080 | * topology, and thus, routing recalculation is not needed here. | |
3081 | */ | |
3082 | break; | |
718e3744 | 3083 | #endif /* HAVE_OPAQUE_LSA */ |
09e4efdc | 3084 | case OSPF_AS_EXTERNAL_LSA: |
beebba75 | 3085 | case OSPF_AS_NSSA_LSA: |
68980084 | 3086 | ospf_ase_incremental_update (ospf, lsa); |
3087 | break; | |
718e3744 | 3088 | default: |
cf744958 | 3089 | ospf_flag_spf_reason (SPF_FLAG_MAXAGE); |
68980084 | 3090 | ospf_spf_calculate_schedule (ospf); |
3091 | break; | |
718e3744 | 3092 | } |
68980084 | 3093 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 3094 | } |
3095 | ||
c363d386 PJ |
3096 | if (IS_LSA_MAXAGE (lsa) && !ospf_lsa_is_self_originated (ospf, lsa)) |
3097 | if (LS_AGE (lsa) > OSPF_LSA_MAXAGE + 30) | |
3098 | printf ("Eek! Shouldn't happen!\n"); | |
3099 | ||
718e3744 | 3100 | return 0; |
3101 | } | |
3102 | ||
3103 | /* Periodical check of MaxAge LSA. */ | |
3104 | int | |
68980084 | 3105 | ospf_lsa_maxage_walker (struct thread *thread) |
718e3744 | 3106 | { |
68980084 | 3107 | struct ospf *ospf = THREAD_ARG (thread); |
3108 | struct route_node *rn; | |
3109 | struct ospf_lsa *lsa; | |
1eb8ef25 | 3110 | struct ospf_area *area; |
3111 | struct listnode *node, *nnode; | |
718e3744 | 3112 | |
68980084 | 3113 | ospf->t_maxage_walker = NULL; |
718e3744 | 3114 | |
1eb8ef25 | 3115 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 3116 | { |
68980084 | 3117 | LSDB_LOOP (ROUTER_LSDB (area), rn, lsa) |
3118 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3119 | LSDB_LOOP (NETWORK_LSDB (area), rn, lsa) | |
3120 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3121 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) | |
3122 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3123 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
3124 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3125 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3126 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) |
3127 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3128 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) | |
3129 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3130 | #endif /* HAVE_OPAQUE_LSA */ |
4fb949e3 | 3131 | LSDB_LOOP (NSSA_LSDB (area), rn, lsa) |
3132 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3133 | } |
3134 | ||
4fb949e3 | 3135 | /* for AS-external-LSAs. */ |
68980084 | 3136 | if (ospf->lsdb) |
3137 | { | |
3138 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) | |
3139 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3140 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3141 | LSDB_LOOP (OPAQUE_AS_LSDB (ospf), rn, lsa) |
3142 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3143 | #endif /* HAVE_OPAQUE_LSA */ |
68980084 | 3144 | } |
718e3744 | 3145 | |
68980084 | 3146 | OSPF_TIMER_ON (ospf->t_maxage_walker, ospf_lsa_maxage_walker, |
3147 | OSPF_LSA_MAXAGE_CHECK_INTERVAL); | |
718e3744 | 3148 | return 0; |
3149 | } | |
3150 | ||
68980084 | 3151 | struct ospf_lsa * |
3152 | ospf_lsa_lookup_by_prefix (struct ospf_lsdb *lsdb, u_char type, | |
3153 | struct prefix_ipv4 *p, struct in_addr router_id) | |
718e3744 | 3154 | { |
68980084 | 3155 | struct ospf_lsa *lsa; |
3156 | struct in_addr mask, id; | |
3157 | struct lsa_header_mask | |
3158 | { | |
3159 | struct lsa_header header; | |
3160 | struct in_addr mask; | |
3161 | } *hmask; | |
718e3744 | 3162 | |
68980084 | 3163 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, p->prefix, router_id); |
3164 | if (lsa == NULL) | |
3165 | return NULL; | |
718e3744 | 3166 | |
68980084 | 3167 | masklen2ip (p->prefixlen, &mask); |
718e3744 | 3168 | |
68980084 | 3169 | hmask = (struct lsa_header_mask *) lsa->data; |
718e3744 | 3170 | |
68980084 | 3171 | if (mask.s_addr != hmask->mask.s_addr) |
3172 | { | |
3173 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
3174 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, id, router_id); | |
3175 | if (!lsa) | |
3176 | return NULL; | |
3177 | } | |
718e3744 | 3178 | |
68980084 | 3179 | return lsa; |
718e3744 | 3180 | } |
3181 | ||
3182 | struct ospf_lsa * | |
3183 | ospf_lsa_lookup (struct ospf_area *area, u_int32_t type, | |
3184 | struct in_addr id, struct in_addr adv_router) | |
3185 | { | |
e05fba43 | 3186 | struct ospf *ospf = ospf_lookup(); |
3187 | assert(ospf); | |
3188 | ||
718e3744 | 3189 | switch (type) |
3190 | { | |
3191 | case OSPF_ROUTER_LSA: | |
3192 | case OSPF_NETWORK_LSA: | |
3193 | case OSPF_SUMMARY_LSA: | |
3194 | case OSPF_ASBR_SUMMARY_LSA: | |
718e3744 | 3195 | case OSPF_AS_NSSA_LSA: |
718e3744 | 3196 | #ifdef HAVE_OPAQUE_LSA |
3197 | case OSPF_OPAQUE_LINK_LSA: | |
3198 | case OSPF_OPAQUE_AREA_LSA: | |
3199 | #endif /* HAVE_OPAQUE_LSA */ | |
3200 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, adv_router); | |
718e3744 | 3201 | case OSPF_AS_EXTERNAL_LSA: |
3202 | #ifdef HAVE_OPAQUE_LSA | |
3203 | case OSPF_OPAQUE_AS_LSA: | |
3204 | #endif /* HAVE_OPAQUE_LSA */ | |
e05fba43 | 3205 | return ospf_lsdb_lookup_by_id (ospf->lsdb, type, id, adv_router); |
718e3744 | 3206 | default: |
3207 | break; | |
3208 | } | |
3209 | ||
3210 | return NULL; | |
3211 | } | |
3212 | ||
3213 | struct ospf_lsa * | |
3214 | ospf_lsa_lookup_by_id (struct ospf_area *area, u_int32_t type, | |
3215 | struct in_addr id) | |
3216 | { | |
3217 | struct ospf_lsa *lsa; | |
3218 | struct route_node *rn; | |
3219 | ||
3220 | switch (type) | |
3221 | { | |
3222 | case OSPF_ROUTER_LSA: | |
3223 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, id); | |
718e3744 | 3224 | case OSPF_NETWORK_LSA: |
3225 | for (rn = route_top (NETWORK_LSDB (area)); rn; rn = route_next (rn)) | |
3226 | if ((lsa = rn->info)) | |
3227 | if (IPV4_ADDR_SAME (&lsa->data->id, &id)) | |
3228 | { | |
3229 | route_unlock_node (rn); | |
3230 | return lsa; | |
3231 | } | |
3232 | break; | |
3233 | case OSPF_SUMMARY_LSA: | |
3234 | case OSPF_ASBR_SUMMARY_LSA: | |
3235 | /* Currently not used. */ | |
3236 | assert (1); | |
3237 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, id); | |
718e3744 | 3238 | case OSPF_AS_EXTERNAL_LSA: |
d4a53d58 | 3239 | case OSPF_AS_NSSA_LSA: |
718e3744 | 3240 | #ifdef HAVE_OPAQUE_LSA |
3241 | case OSPF_OPAQUE_LINK_LSA: | |
3242 | case OSPF_OPAQUE_AREA_LSA: | |
3243 | case OSPF_OPAQUE_AS_LSA: | |
3244 | /* Currently not used. */ | |
3245 | break; | |
3246 | #endif /* HAVE_OPAQUE_LSA */ | |
3247 | default: | |
3248 | break; | |
3249 | } | |
3250 | ||
3251 | return NULL; | |
3252 | } | |
3253 | ||
3254 | struct ospf_lsa * | |
3255 | ospf_lsa_lookup_by_header (struct ospf_area *area, struct lsa_header *lsah) | |
3256 | { | |
3257 | struct ospf_lsa *match; | |
3258 | ||
3259 | #ifdef HAVE_OPAQUE_LSA | |
3260 | /* | |
3261 | * Strictly speaking, the LSA-ID field for Opaque-LSAs (type-9/10/11) | |
3262 | * is redefined to have two subfields; opaque-type and opaque-id. | |
3263 | * However, it is harmless to treat the two sub fields together, as if | |
3264 | * they two were forming a unique LSA-ID. | |
3265 | */ | |
3266 | #endif /* HAVE_OPAQUE_LSA */ | |
3267 | ||
3268 | match = ospf_lsa_lookup (area, lsah->type, lsah->id, lsah->adv_router); | |
3269 | ||
3270 | if (match == NULL) | |
3271 | if (IS_DEBUG_OSPF (lsa, LSA) == OSPF_DEBUG_LSA) | |
e588f21f | 3272 | zlog_debug ("LSA[Type%d:%s]: Lookup by header, NO MATCH", |
718e3744 | 3273 | lsah->type, inet_ntoa (lsah->id)); |
3274 | ||
3275 | return match; | |
3276 | } | |
3277 | ||
3278 | /* return +n, l1 is more recent. | |
3279 | return -n, l2 is more recent. | |
3280 | return 0, l1 and l2 is identical. */ | |
3281 | int | |
3282 | ospf_lsa_more_recent (struct ospf_lsa *l1, struct ospf_lsa *l2) | |
3283 | { | |
3284 | int r; | |
3285 | int x, y; | |
3286 | ||
3287 | if (l1 == NULL && l2 == NULL) | |
3288 | return 0; | |
3289 | if (l1 == NULL) | |
3290 | return -1; | |
3291 | if (l2 == NULL) | |
3292 | return 1; | |
3293 | ||
3294 | /* compare LS sequence number. */ | |
3295 | x = (int) ntohl (l1->data->ls_seqnum); | |
3296 | y = (int) ntohl (l2->data->ls_seqnum); | |
3297 | if (x > y) | |
3298 | return 1; | |
3299 | if (x < y) | |
3300 | return -1; | |
3301 | ||
3302 | /* compare LS checksum. */ | |
3303 | r = ntohs (l1->data->checksum) - ntohs (l2->data->checksum); | |
3304 | if (r) | |
3305 | return r; | |
3306 | ||
3307 | /* compare LS age. */ | |
3308 | if (IS_LSA_MAXAGE (l1) && !IS_LSA_MAXAGE (l2)) | |
3309 | return 1; | |
3310 | else if (!IS_LSA_MAXAGE (l1) && IS_LSA_MAXAGE (l2)) | |
3311 | return -1; | |
3312 | ||
3313 | /* compare LS age with MaxAgeDiff. */ | |
3314 | if (LS_AGE (l1) - LS_AGE (l2) > OSPF_LSA_MAXAGE_DIFF) | |
3315 | return -1; | |
3316 | else if (LS_AGE (l2) - LS_AGE (l1) > OSPF_LSA_MAXAGE_DIFF) | |
3317 | return 1; | |
3318 | ||
3319 | /* LSAs are identical. */ | |
3320 | return 0; | |
3321 | } | |
3322 | ||
3323 | /* If two LSAs are different, return 1, otherwise return 0. */ | |
3324 | int | |
3325 | ospf_lsa_different (struct ospf_lsa *l1, struct ospf_lsa *l2) | |
3326 | { | |
3327 | char *p1, *p2; | |
3328 | assert (l1); | |
3329 | assert (l2); | |
3330 | assert (l1->data); | |
3331 | assert (l2->data); | |
3332 | ||
3333 | if (l1->data->options != l2->data->options) | |
3334 | return 1; | |
3335 | ||
3336 | if (IS_LSA_MAXAGE (l1) && !IS_LSA_MAXAGE (l2)) | |
3337 | return 1; | |
3338 | ||
3339 | if (IS_LSA_MAXAGE (l2) && !IS_LSA_MAXAGE (l1)) | |
3340 | return 1; | |
3341 | ||
3342 | if (l1->data->length != l2->data->length) | |
3343 | return 1; | |
3344 | ||
3345 | if (l1->data->length == 0) | |
3346 | return 1; | |
3347 | ||
5996e0df JT |
3348 | if (CHECK_FLAG ((l1->flags ^ l2->flags), OSPF_LSA_RECEIVED)) |
3349 | return 1; /* May be a stale LSA in the LSBD */ | |
3350 | ||
d1825830 | 3351 | assert ( ntohs(l1->data->length) > OSPF_LSA_HEADER_SIZE); |
718e3744 | 3352 | |
3353 | p1 = (char *) l1->data; | |
3354 | p2 = (char *) l2->data; | |
3355 | ||
3356 | if (memcmp (p1 + OSPF_LSA_HEADER_SIZE, p2 + OSPF_LSA_HEADER_SIZE, | |
3357 | ntohs( l1->data->length ) - OSPF_LSA_HEADER_SIZE) != 0) | |
3358 | return 1; | |
3359 | ||
3360 | return 0; | |
3361 | } | |
3362 | ||
3363 | #ifdef ORIGINAL_CODING | |
3364 | void | |
3365 | ospf_lsa_flush_self_originated (struct ospf_neighbor *nbr, | |
3366 | struct ospf_lsa *self, | |
3367 | struct ospf_lsa *new) | |
3368 | { | |
3369 | u_int32_t seqnum; | |
3370 | ||
3371 | /* Adjust LS Sequence Number. */ | |
3372 | seqnum = ntohl (new->data->ls_seqnum) + 1; | |
3373 | self->data->ls_seqnum = htonl (seqnum); | |
3374 | ||
3375 | /* Recalculate LSA checksum. */ | |
3376 | ospf_lsa_checksum (self->data); | |
3377 | ||
3378 | /* Reflooding LSA. */ | |
3379 | /* RFC2328 Section 13.3 | |
3380 | On non-broadcast networks, separate Link State Update | |
3381 | packets must be sent, as unicasts, to each adjacent neighbor | |
3382 | (i.e., those in state Exchange or greater). The destination | |
3383 | IP addresses for these packets are the neighbors' IP | |
3384 | addresses. */ | |
3385 | if (nbr->oi->type == OSPF_IFTYPE_NBMA) | |
3386 | { | |
3387 | struct route_node *rn; | |
3388 | struct ospf_neighbor *onbr; | |
3389 | ||
3390 | for (rn = route_top (nbr->oi->nbrs); rn; rn = route_next (rn)) | |
3391 | if ((onbr = rn->info) != NULL) | |
3392 | if (onbr != nbr->oi->nbr_self && onbr->status >= NSM_Exchange) | |
3393 | ospf_ls_upd_send_lsa (onbr, self, OSPF_SEND_PACKET_DIRECT); | |
3394 | } | |
3395 | else | |
3396 | ospf_ls_upd_send_lsa (nbr, self, OSPF_SEND_PACKET_INDIRECT); | |
3397 | ||
3398 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3399 | zlog_debug ("LSA[Type%d:%s]: Flush self-originated LSA", |
718e3744 | 3400 | self->data->type, inet_ntoa (self->data->id)); |
3401 | } | |
3402 | #else /* ORIGINAL_CODING */ | |
2c19a6ec | 3403 | int |
68980084 | 3404 | ospf_lsa_flush_schedule (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3405 | { |
3406 | if (lsa == NULL || !IS_LSA_SELF (lsa)) | |
3407 | return 0; | |
3408 | ||
3409 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 3410 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", lsa->data->type, inet_ntoa (lsa->data->id)); |
718e3744 | 3411 | |
3412 | /* Force given lsa's age to MaxAge. */ | |
3413 | lsa->data->ls_age = htons (OSPF_LSA_MAXAGE); | |
3414 | ||
3415 | switch (lsa->data->type) | |
3416 | { | |
3417 | #ifdef HAVE_OPAQUE_LSA | |
02d942c9 | 3418 | /* Opaque wants to be notified of flushes */ |
718e3744 | 3419 | case OSPF_OPAQUE_LINK_LSA: |
3420 | case OSPF_OPAQUE_AREA_LSA: | |
3421 | case OSPF_OPAQUE_AS_LSA: | |
3422 | ospf_opaque_lsa_refresh (lsa); | |
3423 | break; | |
3424 | #endif /* HAVE_OPAQUE_LSA */ | |
3425 | default: | |
dfbd5176 | 3426 | ospf_refresher_unregister_lsa (ospf, lsa); |
02d942c9 | 3427 | ospf_lsa_flush (ospf, lsa); |
718e3744 | 3428 | break; |
3429 | } | |
3430 | ||
3431 | return 0; | |
3432 | } | |
3433 | ||
3434 | void | |
68980084 | 3435 | ospf_flush_self_originated_lsas_now (struct ospf *ospf) |
718e3744 | 3436 | { |
1eb8ef25 | 3437 | struct listnode *node, *nnode; |
3438 | struct listnode *node2, *nnode2; | |
718e3744 | 3439 | struct ospf_area *area; |
3440 | struct ospf_interface *oi; | |
3441 | struct ospf_lsa *lsa; | |
68980084 | 3442 | struct route_node *rn; |
718e3744 | 3443 | int need_to_flush_ase = 0; |
3444 | ||
1eb8ef25 | 3445 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 3446 | { |
718e3744 | 3447 | if ((lsa = area->router_lsa_self) != NULL) |
3448 | { | |
3449 | if (IS_DEBUG_OSPF_EVENT) | |
dfbd5176 PJ |
3450 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", |
3451 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
3452 | ||
3453 | ospf_refresher_unregister_lsa (ospf, lsa); | |
718e3744 | 3454 | ospf_lsa_flush_area (lsa, area); |
1fe6ed38 | 3455 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 3456 | area->router_lsa_self = NULL; |
718e3744 | 3457 | } |
3458 | ||
1eb8ef25 | 3459 | for (ALL_LIST_ELEMENTS (area->oiflist, node2, nnode2, oi)) |
718e3744 | 3460 | { |
718e3744 | 3461 | if ((lsa = oi->network_lsa_self) != NULL |
1eb8ef25 | 3462 | && oi->state == ISM_DR |
3463 | && oi->full_nbrs > 0) | |
718e3744 | 3464 | { |
3465 | if (IS_DEBUG_OSPF_EVENT) | |
dfbd5176 PJ |
3466 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", |
3467 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
3468 | ||
3469 | ospf_refresher_unregister_lsa (ospf, oi->network_lsa_self); | |
718e3744 | 3470 | ospf_lsa_flush_area (oi->network_lsa_self, area); |
1fe6ed38 | 3471 | ospf_lsa_unlock (&oi->network_lsa_self); |
718e3744 | 3472 | oi->network_lsa_self = NULL; |
718e3744 | 3473 | } |
3474 | ||
3475 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK | |
3476 | && area->external_routing == OSPF_AREA_DEFAULT) | |
3477 | need_to_flush_ase = 1; | |
3478 | } | |
3479 | ||
68980084 | 3480 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) |
3481 | ospf_lsa_flush_schedule (ospf, lsa); | |
3482 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
3483 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3484 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3485 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) |
3486 | ospf_lsa_flush_schedule (ospf, lsa); | |
3487 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) | |
3488 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3489 | #endif /* HAVE_OPAQUE_LSA */ |
3490 | } | |
3491 | ||
3492 | if (need_to_flush_ase) | |
3493 | { | |
68980084 | 3494 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) |
3495 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3496 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3497 | LSDB_LOOP (OPAQUE_AS_LSDB (ospf), rn, lsa) |
3498 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3499 | #endif /* HAVE_OPAQUE_LSA */ |
3500 | } | |
3501 | ||
3502 | /* | |
3503 | * Make sure that the MaxAge LSA remover is executed immediately, | |
3504 | * without conflicting to other threads. | |
3505 | */ | |
68980084 | 3506 | if (ospf->t_maxage != NULL) |
718e3744 | 3507 | { |
68980084 | 3508 | OSPF_TIMER_OFF (ospf->t_maxage); |
3509 | thread_execute (master, ospf_maxage_lsa_remover, ospf, 0); | |
718e3744 | 3510 | } |
3511 | ||
3512 | return; | |
3513 | } | |
3514 | #endif /* ORIGINAL_CODING */ | |
3515 | ||
3516 | /* If there is self-originated LSA, then return 1, otherwise return 0. */ | |
3517 | /* An interface-independent version of ospf_lsa_is_self_originated */ | |
3518 | int | |
68980084 | 3519 | ospf_lsa_is_self_originated (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3520 | { |
52dc7ee6 | 3521 | struct listnode *node; |
1eb8ef25 | 3522 | struct ospf_interface *oi; |
718e3744 | 3523 | |
3524 | /* This LSA is already checked. */ | |
3525 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF_CHECKED)) | |
ce3cdcfb | 3526 | return IS_LSA_SELF (lsa); |
718e3744 | 3527 | |
3528 | /* Make sure LSA is self-checked. */ | |
3529 | SET_FLAG (lsa->flags, OSPF_LSA_SELF_CHECKED); | |
3530 | ||
3531 | /* AdvRouter and Router ID is the same. */ | |
68980084 | 3532 | if (IPV4_ADDR_SAME (&lsa->data->adv_router, &ospf->router_id)) |
718e3744 | 3533 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); |
3534 | ||
3535 | /* LSA is router-LSA. */ | |
3536 | else if (lsa->data->type == OSPF_ROUTER_LSA && | |
68980084 | 3537 | IPV4_ADDR_SAME (&lsa->data->id, &ospf->router_id)) |
718e3744 | 3538 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); |
3539 | ||
3540 | /* LSA is network-LSA. Compare Link ID with all interfaces. */ | |
3541 | else if (lsa->data->type == OSPF_NETWORK_LSA) | |
1eb8ef25 | 3542 | for (ALL_LIST_ELEMENTS_RO (ospf->oiflist, node, oi)) |
718e3744 | 3543 | { |
718e3744 | 3544 | /* Ignore virtual link. */ |
3545 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
3546 | if (oi->address->family == AF_INET) | |
3547 | if (IPV4_ADDR_SAME (&lsa->data->id, &oi->address->u.prefix4)) | |
3548 | { | |
3549 | /* to make it easier later */ | |
3550 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); | |
ce3cdcfb | 3551 | return IS_LSA_SELF (lsa); |
718e3744 | 3552 | } |
3553 | } | |
3554 | ||
ce3cdcfb | 3555 | return IS_LSA_SELF (lsa); |
718e3744 | 3556 | } |
3557 | ||
3558 | /* Get unique Link State ID. */ | |
3559 | struct in_addr | |
68980084 | 3560 | ospf_lsa_unique_id (struct ospf *ospf, |
3561 | struct ospf_lsdb *lsdb, u_char type, struct prefix_ipv4 *p) | |
718e3744 | 3562 | { |
3563 | struct ospf_lsa *lsa; | |
3564 | struct in_addr mask, id; | |
3565 | ||
3566 | id = p->prefix; | |
3567 | ||
3568 | /* Check existence of LSA instance. */ | |
68980084 | 3569 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, id, ospf->router_id); |
718e3744 | 3570 | if (lsa) |
3571 | { | |
3572 | struct as_external_lsa *al = (struct as_external_lsa *) lsa->data; | |
3573 | if (ip_masklen (al->mask) == p->prefixlen) | |
3574 | { | |
3575 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3576 | zlog_debug ("ospf_lsa_unique_id(): " |
718e3744 | 3577 | "Can't get Link State ID for %s/%d", |
3578 | inet_ntoa (p->prefix), p->prefixlen); | |
3579 | /* id.s_addr = 0; */ | |
3580 | id.s_addr = 0xffffffff; | |
3581 | return id; | |
3582 | } | |
3583 | /* Masklen differs, then apply wildcard mask to Link State ID. */ | |
3584 | else | |
3585 | { | |
3586 | masklen2ip (p->prefixlen, &mask); | |
3587 | ||
3588 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
68980084 | 3589 | lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, type, |
3590 | id, ospf->router_id); | |
718e3744 | 3591 | if (lsa) |
3592 | { | |
3593 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3594 | zlog_debug ("ospf_lsa_unique_id(): " |
718e3744 | 3595 | "Can't get Link State ID for %s/%d", |
3596 | inet_ntoa (p->prefix), p->prefixlen); | |
3597 | /* id.s_addr = 0; */ | |
3598 | id.s_addr = 0xffffffff; | |
3599 | return id; | |
3600 | } | |
3601 | } | |
3602 | } | |
3603 | ||
3604 | return id; | |
3605 | } | |
3606 | ||
6b0655a2 | 3607 | |
70461d79 PJ |
3608 | #define LSA_ACTION_FLOOD_AREA 1 |
3609 | #define LSA_ACTION_FLUSH_AREA 2 | |
718e3744 | 3610 | |
3611 | struct lsa_action | |
3612 | { | |
3613 | u_char action; | |
3614 | struct ospf_area *area; | |
718e3744 | 3615 | struct ospf_lsa *lsa; |
3616 | }; | |
3617 | ||
4dadc291 | 3618 | static int |
718e3744 | 3619 | ospf_lsa_action (struct thread *t) |
3620 | { | |
3621 | struct lsa_action *data; | |
3622 | ||
3623 | data = THREAD_ARG (t); | |
3624 | ||
3625 | if (IS_DEBUG_OSPF (lsa, LSA) == OSPF_DEBUG_LSA) | |
e588f21f | 3626 | zlog_debug ("LSA[Action]: Performing scheduled LSA action: %d", |
718e3744 | 3627 | data->action); |
3628 | ||
3629 | switch (data->action) | |
3630 | { | |
718e3744 | 3631 | case LSA_ACTION_FLOOD_AREA: |
3632 | ospf_flood_through_area (data->area, NULL, data->lsa); | |
3633 | break; | |
718e3744 | 3634 | case LSA_ACTION_FLUSH_AREA: |
3635 | ospf_lsa_flush_area (data->lsa, data->area); | |
3636 | break; | |
718e3744 | 3637 | } |
3638 | ||
1fe6ed38 | 3639 | ospf_lsa_unlock (&data->lsa); /* Message */ |
718e3744 | 3640 | XFREE (MTYPE_OSPF_MESSAGE, data); |
3641 | return 0; | |
3642 | } | |
3643 | ||
3644 | void | |
3645 | ospf_schedule_lsa_flood_area (struct ospf_area *area, struct ospf_lsa *lsa) | |
3646 | { | |
3647 | struct lsa_action *data; | |
3648 | ||
393deb9b | 3649 | data = XCALLOC (MTYPE_OSPF_MESSAGE, sizeof (struct lsa_action)); |
718e3744 | 3650 | data->action = LSA_ACTION_FLOOD_AREA; |
3651 | data->area = area; | |
1fe6ed38 | 3652 | data->lsa = ospf_lsa_lock (lsa); /* Message / Flood area */ |
718e3744 | 3653 | |
3654 | thread_add_event (master, ospf_lsa_action, data, 0); | |
3655 | } | |
3656 | ||
3657 | void | |
3658 | ospf_schedule_lsa_flush_area (struct ospf_area *area, struct ospf_lsa *lsa) | |
3659 | { | |
3660 | struct lsa_action *data; | |
3661 | ||
393deb9b | 3662 | data = XCALLOC (MTYPE_OSPF_MESSAGE, sizeof (struct lsa_action)); |
718e3744 | 3663 | data->action = LSA_ACTION_FLUSH_AREA; |
3664 | data->area = area; | |
1fe6ed38 | 3665 | data->lsa = ospf_lsa_lock (lsa); /* Message / Flush area */ |
718e3744 | 3666 | |
3667 | thread_add_event (master, ospf_lsa_action, data, 0); | |
3668 | } | |
3669 | ||
6b0655a2 | 3670 | |
718e3744 | 3671 | /* LSA Refreshment functions. */ |
c363d386 | 3672 | struct ospf_lsa * |
68980084 | 3673 | ospf_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3674 | { |
3675 | struct external_info *ei; | |
c363d386 | 3676 | struct ospf_lsa *new = NULL; |
718e3744 | 3677 | assert (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF)); |
ce3cdcfb | 3678 | assert (IS_LSA_SELF (lsa)); |
6634974d | 3679 | assert (lsa->lock > 0); |
718e3744 | 3680 | |
3681 | switch (lsa->data->type) | |
3682 | { | |
3683 | /* Router and Network LSAs are processed differently. */ | |
3684 | case OSPF_ROUTER_LSA: | |
c363d386 PJ |
3685 | new = ospf_router_lsa_refresh (lsa); |
3686 | break; | |
718e3744 | 3687 | case OSPF_NETWORK_LSA: |
c363d386 | 3688 | new = ospf_network_lsa_refresh (lsa); |
718e3744 | 3689 | break; |
3690 | case OSPF_SUMMARY_LSA: | |
c363d386 | 3691 | new = ospf_summary_lsa_refresh (ospf, lsa); |
718e3744 | 3692 | break; |
3693 | case OSPF_ASBR_SUMMARY_LSA: | |
c363d386 | 3694 | new = ospf_summary_asbr_lsa_refresh (ospf, lsa); |
718e3744 | 3695 | break; |
3696 | case OSPF_AS_EXTERNAL_LSA: | |
d4a53d58 | 3697 | /* Translated from NSSA Type-5s are refreshed when |
3698 | * from refresh of Type-7 - do not refresh these directly. | |
3699 | */ | |
3700 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
3701 | break; | |
718e3744 | 3702 | ei = ospf_external_info_check (lsa); |
3703 | if (ei) | |
c363d386 | 3704 | new = ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_FORCE); |
718e3744 | 3705 | else |
d4a53d58 | 3706 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 3707 | break; |
3708 | #ifdef HAVE_OPAQUE_LSA | |
3709 | case OSPF_OPAQUE_LINK_LSA: | |
3710 | case OSPF_OPAQUE_AREA_LSA: | |
3711 | case OSPF_OPAQUE_AS_LSA: | |
c363d386 | 3712 | new = ospf_opaque_lsa_refresh (lsa); |
718e3744 | 3713 | break; |
d748032f | 3714 | #endif /* HAVE_OPAQUE_LSA */ |
718e3744 | 3715 | default: |
3716 | break; | |
718e3744 | 3717 | } |
c363d386 | 3718 | return new; |
718e3744 | 3719 | } |
3720 | ||
3721 | void | |
68980084 | 3722 | ospf_refresher_register_lsa (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3723 | { |
3724 | u_int16_t index, current_index; | |
3725 | ||
6634974d | 3726 | assert (lsa->lock > 0); |
ce3cdcfb | 3727 | assert (IS_LSA_SELF (lsa)); |
718e3744 | 3728 | |
3729 | if (lsa->refresh_list < 0) | |
3730 | { | |
3731 | int delay; | |
3732 | ||
3733 | if (LS_AGE (lsa) == 0 && | |
3734 | ntohl (lsa->data->ls_seqnum) == OSPF_INITIAL_SEQUENCE_NUMBER) | |
3735 | /* Randomize first update by OSPF_LS_REFRESH_SHIFT factor */ | |
3736 | delay = OSPF_LS_REFRESH_SHIFT + (random () % OSPF_LS_REFRESH_TIME); | |
3737 | else | |
3738 | /* Randomize another updates by +-OSPF_LS_REFRESH_JITTER factor */ | |
3739 | delay = OSPF_LS_REFRESH_TIME - LS_AGE (lsa) - OSPF_LS_REFRESH_JITTER | |
3740 | + (random () % (2*OSPF_LS_REFRESH_JITTER)); | |
3741 | ||
3742 | if (delay < 0) | |
3743 | delay = 0; | |
3744 | ||
c363d386 PJ |
3745 | current_index = ospf->lsa_refresh_queue.index + (quagga_time (NULL) |
3746 | - ospf->lsa_refresher_started)/OSPF_LSA_REFRESHER_GRANULARITY; | |
718e3744 | 3747 | |
3748 | index = (current_index + delay/OSPF_LSA_REFRESHER_GRANULARITY) | |
c363d386 | 3749 | % (OSPF_LSA_REFRESHER_SLOTS); |
718e3744 | 3750 | |
3751 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3752 | zlog_debug ("LSA[Refresh]: lsa %s with age %d added to index %d", |
d4a53d58 | 3753 | inet_ntoa (lsa->data->id), LS_AGE (lsa), index); |
68980084 | 3754 | if (!ospf->lsa_refresh_queue.qs[index]) |
3755 | ospf->lsa_refresh_queue.qs[index] = list_new (); | |
1fe6ed38 PJ |
3756 | listnode_add (ospf->lsa_refresh_queue.qs[index], |
3757 | ospf_lsa_lock (lsa)); /* lsa_refresh_queue */ | |
718e3744 | 3758 | lsa->refresh_list = index; |
f2c80652 | 3759 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) |
e588f21f | 3760 | zlog_debug ("LSA[Refresh:%s]: ospf_refresher_register_lsa(): " |
d4a53d58 | 3761 | "setting refresh_list on lsa %p (slod %d)", |
3762 | inet_ntoa (lsa->data->id), lsa, index); | |
718e3744 | 3763 | } |
3764 | } | |
3765 | ||
3766 | void | |
68980084 | 3767 | ospf_refresher_unregister_lsa (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3768 | { |
6634974d | 3769 | assert (lsa->lock > 0); |
ce3cdcfb | 3770 | assert (IS_LSA_SELF (lsa)); |
718e3744 | 3771 | if (lsa->refresh_list >= 0) |
3772 | { | |
52dc7ee6 | 3773 | struct list *refresh_list = ospf->lsa_refresh_queue.qs[lsa->refresh_list]; |
718e3744 | 3774 | listnode_delete (refresh_list, lsa); |
3775 | if (!listcount (refresh_list)) | |
3776 | { | |
3777 | list_free (refresh_list); | |
68980084 | 3778 | ospf->lsa_refresh_queue.qs[lsa->refresh_list] = NULL; |
718e3744 | 3779 | } |
1fe6ed38 | 3780 | ospf_lsa_unlock (&lsa); /* lsa_refresh_queue */ |
718e3744 | 3781 | lsa->refresh_list = -1; |
3782 | } | |
3783 | } | |
3784 | ||
3785 | int | |
3786 | ospf_lsa_refresh_walker (struct thread *t) | |
3787 | { | |
52dc7ee6 | 3788 | struct list *refresh_list; |
1eb8ef25 | 3789 | struct listnode *node, *nnode; |
68980084 | 3790 | struct ospf *ospf = THREAD_ARG (t); |
1eb8ef25 | 3791 | struct ospf_lsa *lsa; |
718e3744 | 3792 | int i; |
52dc7ee6 | 3793 | struct list *lsa_to_refresh = list_new (); |
718e3744 | 3794 | |
3795 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3796 | zlog_debug ("LSA[Refresh]:ospf_lsa_refresh_walker(): start"); |
718e3744 | 3797 | |
3798 | ||
68980084 | 3799 | i = ospf->lsa_refresh_queue.index; |
718e3744 | 3800 | |
9dbc7972 | 3801 | /* Note: if clock has jumped backwards, then time change could be negative, |
3802 | so we are careful to cast the expression to unsigned before taking | |
3803 | modulus. */ | |
68980084 | 3804 | ospf->lsa_refresh_queue.index = |
9dbc7972 | 3805 | ((unsigned long)(ospf->lsa_refresh_queue.index + |
c363d386 PJ |
3806 | (quagga_time (NULL) - ospf->lsa_refresher_started) |
3807 | / OSPF_LSA_REFRESHER_GRANULARITY)) | |
3808 | % OSPF_LSA_REFRESHER_SLOTS; | |
718e3744 | 3809 | |
3810 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3811 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): next index %d", |
68980084 | 3812 | ospf->lsa_refresh_queue.index); |
718e3744 | 3813 | |
68980084 | 3814 | for (;i != ospf->lsa_refresh_queue.index; |
718e3744 | 3815 | i = (i + 1) % OSPF_LSA_REFRESHER_SLOTS) |
3816 | { | |
3817 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3818 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): " |
d4a53d58 | 3819 | "refresh index %d", i); |
718e3744 | 3820 | |
68980084 | 3821 | refresh_list = ospf->lsa_refresh_queue.qs [i]; |
718e3744 | 3822 | |
6634974d PJ |
3823 | assert (i >= 0); |
3824 | ||
68980084 | 3825 | ospf->lsa_refresh_queue.qs [i] = NULL; |
3826 | ||
718e3744 | 3827 | if (refresh_list) |
3828 | { | |
1eb8ef25 | 3829 | for (ALL_LIST_ELEMENTS (refresh_list, node, nnode, lsa)) |
718e3744 | 3830 | { |
718e3744 | 3831 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) |
e588f21f | 3832 | zlog_debug ("LSA[Refresh:%s]: ospf_lsa_refresh_walker(): " |
d4a53d58 | 3833 | "refresh lsa %p (slot %d)", |
3834 | inet_ntoa (lsa->data->id), lsa, i); | |
718e3744 | 3835 | |
6634974d | 3836 | assert (lsa->lock > 0); |
718e3744 | 3837 | list_delete_node (refresh_list, node); |
718e3744 | 3838 | lsa->refresh_list = -1; |
3839 | listnode_add (lsa_to_refresh, lsa); | |
718e3744 | 3840 | } |
3841 | list_free (refresh_list); | |
3842 | } | |
3843 | } | |
3844 | ||
68980084 | 3845 | ospf->t_lsa_refresher = thread_add_timer (master, ospf_lsa_refresh_walker, |
3846 | ospf, ospf->lsa_refresh_interval); | |
2518efd1 | 3847 | ospf->lsa_refresher_started = quagga_time (NULL); |
718e3744 | 3848 | |
1eb8ef25 | 3849 | for (ALL_LIST_ELEMENTS (lsa_to_refresh, node, nnode, lsa)) |
6634974d PJ |
3850 | { |
3851 | ospf_lsa_refresh (ospf, lsa); | |
3852 | assert (lsa->lock > 0); | |
3853 | ospf_lsa_unlock (&lsa); /* lsa_refresh_queue & temp for lsa_to_refresh*/ | |
3854 | } | |
718e3744 | 3855 | |
3856 | list_delete (lsa_to_refresh); | |
3857 | ||
3858 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3859 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): end"); |
718e3744 | 3860 | |
3861 | return 0; | |
3862 | } | |
3863 |