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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 | ||
cbf3e3eb | 25 | #include "monotime.h" |
718e3744 | 26 | #include "linklist.h" |
27 | #include "prefix.h" | |
28 | #include "if.h" | |
29 | #include "table.h" | |
30 | #include "memory.h" | |
31 | #include "stream.h" | |
32 | #include "log.h" | |
33 | #include "thread.h" | |
34 | #include "hash.h" | |
35 | #include "sockunion.h" /* for inet_aton() */ | |
6a270cd9 | 36 | #include "checksum.h" |
718e3744 | 37 | |
38 | #include "ospfd/ospfd.h" | |
39 | #include "ospfd/ospf_interface.h" | |
40 | #include "ospfd/ospf_ism.h" | |
41 | #include "ospfd/ospf_asbr.h" | |
42 | #include "ospfd/ospf_lsa.h" | |
43 | #include "ospfd/ospf_lsdb.h" | |
44 | #include "ospfd/ospf_neighbor.h" | |
45 | #include "ospfd/ospf_nsm.h" | |
46 | #include "ospfd/ospf_flood.h" | |
47 | #include "ospfd/ospf_packet.h" | |
48 | #include "ospfd/ospf_spf.h" | |
49 | #include "ospfd/ospf_dump.h" | |
50 | #include "ospfd/ospf_route.h" | |
51 | #include "ospfd/ospf_ase.h" | |
52 | #include "ospfd/ospf_zebra.h" | |
53 | ||
6b0655a2 | 54 | |
718e3744 | 55 | u_int32_t |
56 | get_metric (u_char *metric) | |
57 | { | |
58 | u_int32_t m; | |
59 | m = metric[0]; | |
60 | m = (m << 8) + metric[1]; | |
61 | m = (m << 8) + metric[2]; | |
62 | return m; | |
63 | } | |
64 | ||
6b0655a2 | 65 | |
b6927875 | 66 | struct timeval |
16e56a14 | 67 | int2tv (int a) |
b6927875 DS |
68 | { |
69 | struct timeval ret; | |
70 | ||
16e56a14 MR |
71 | ret.tv_sec = a; |
72 | ret.tv_usec = 0; | |
b6927875 DS |
73 | |
74 | return ret; | |
75 | } | |
76 | ||
718e3744 | 77 | struct timeval |
16e56a14 | 78 | msec2tv (int a) |
718e3744 | 79 | { |
80 | struct timeval ret; | |
81 | ||
16e56a14 MR |
82 | ret.tv_sec = a/1000; |
83 | ret.tv_usec = (a%1000) * 1000; | |
718e3744 | 84 | |
cbf3e3eb | 85 | return ret; |
718e3744 | 86 | } |
87 | ||
88 | int | |
89 | ospf_lsa_refresh_delay (struct ospf_lsa *lsa) | |
90 | { | |
cbf3e3eb | 91 | struct timeval delta; |
718e3744 | 92 | int delay = 0; |
93 | ||
cbf3e3eb | 94 | if (monotime_since (&lsa->tv_orig, &delta) < OSPF_MIN_LS_INTERVAL * 1000LL) |
718e3744 | 95 | { |
cbf3e3eb DL |
96 | struct timeval minv = msec2tv (OSPF_MIN_LS_INTERVAL); |
97 | timersub (&minv, &delta, &minv); | |
98 | ||
99 | /* TBD: remove padding to full sec, return timeval instead */ | |
100 | delay = minv.tv_sec + !!minv.tv_usec; | |
718e3744 | 101 | |
102 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 103 | zlog_debug ("LSA[Type%d:%s]: Refresh timer delay %d seconds", |
718e3744 | 104 | lsa->data->type, inet_ntoa (lsa->data->id), delay); |
105 | ||
106 | assert (delay > 0); | |
107 | } | |
108 | ||
109 | return delay; | |
110 | } | |
111 | ||
6b0655a2 | 112 | |
718e3744 | 113 | int |
114 | get_age (struct ospf_lsa *lsa) | |
115 | { | |
cbf3e3eb | 116 | struct timeval rel; |
718e3744 | 117 | |
cbf3e3eb DL |
118 | monotime_since (&lsa->tv_recv, &rel); |
119 | return ntohs (lsa->data->ls_age) + rel.tv_sec; | |
718e3744 | 120 | } |
121 | ||
6b0655a2 | 122 | |
718e3744 | 123 | /* Fletcher Checksum -- Refer to RFC1008. */ |
718e3744 | 124 | |
6a270cd9 JD |
125 | /* All the offsets are zero-based. The offsets in the RFC1008 are |
126 | one-based. */ | |
718e3744 | 127 | u_int16_t |
128 | ospf_lsa_checksum (struct lsa_header *lsa) | |
129 | { | |
6a270cd9 JD |
130 | u_char *buffer = (u_char *) &lsa->options; |
131 | int options_offset = buffer - (u_char *) &lsa->ls_age; /* should be 2 */ | |
718e3744 | 132 | |
6a270cd9 JD |
133 | /* Skip the AGE field */ |
134 | u_int16_t len = ntohs(lsa->length) - options_offset; | |
718e3744 | 135 | |
6a270cd9 JD |
136 | /* Checksum offset starts from "options" field, not the beginning of the |
137 | lsa_header struct. The offset is 14, rather than 16. */ | |
138 | int checksum_offset = (u_char *) &lsa->checksum - buffer; | |
718e3744 | 139 | |
6a270cd9 | 140 | return fletcher_checksum(buffer, len, checksum_offset); |
718e3744 | 141 | } |
142 | ||
d8a4e42b JR |
143 | int |
144 | ospf_lsa_checksum_valid (struct lsa_header *lsa) | |
145 | { | |
146 | u_char *buffer = (u_char *) &lsa->options; | |
147 | int options_offset = buffer - (u_char *) &lsa->ls_age; /* should be 2 */ | |
148 | ||
149 | /* Skip the AGE field */ | |
150 | u_int16_t len = ntohs(lsa->length) - options_offset; | |
151 | ||
152 | return(fletcher_checksum(buffer, len, FLETCHER_CHECKSUM_VALIDATE) == 0); | |
153 | } | |
154 | ||
718e3744 | 155 | |
6b0655a2 | 156 | |
718e3744 | 157 | /* Create OSPF LSA. */ |
158 | struct ospf_lsa * | |
159 | ospf_lsa_new () | |
160 | { | |
161 | struct ospf_lsa *new; | |
162 | ||
163 | new = XCALLOC (MTYPE_OSPF_LSA, sizeof (struct ospf_lsa)); | |
718e3744 | 164 | |
165 | new->flags = 0; | |
166 | new->lock = 1; | |
167 | new->retransmit_counter = 0; | |
6ced0e7f | 168 | monotime(&new->tv_recv); |
718e3744 | 169 | new->tv_orig = new->tv_recv; |
170 | new->refresh_list = -1; | |
171 | ||
172 | return new; | |
173 | } | |
174 | ||
175 | /* Duplicate OSPF LSA. */ | |
176 | struct ospf_lsa * | |
177 | ospf_lsa_dup (struct ospf_lsa *lsa) | |
178 | { | |
179 | struct ospf_lsa *new; | |
180 | ||
181 | if (lsa == NULL) | |
182 | return NULL; | |
183 | ||
184 | new = XCALLOC (MTYPE_OSPF_LSA, sizeof (struct ospf_lsa)); | |
185 | ||
186 | memcpy (new, lsa, sizeof (struct ospf_lsa)); | |
187 | UNSET_FLAG (new->flags, OSPF_LSA_DISCARD); | |
188 | new->lock = 1; | |
189 | new->retransmit_counter = 0; | |
190 | new->data = ospf_lsa_data_dup (lsa->data); | |
191 | ||
f2c80652 | 192 | /* kevinm: Clear the refresh_list, otherwise there are going |
193 | to be problems when we try to remove the LSA from the | |
194 | queue (which it's not a member of.) | |
195 | XXX: Should we add the LSA to the refresh_list queue? */ | |
196 | new->refresh_list = -1; | |
197 | ||
198 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
6c4f4e6e | 199 | zlog_debug ("LSA: duplicated %p (new: %p)", (void *)lsa, (void *)new); |
f2c80652 | 200 | |
718e3744 | 201 | return new; |
202 | } | |
203 | ||
204 | /* Free OSPF LSA. */ | |
205 | void | |
206 | ospf_lsa_free (struct ospf_lsa *lsa) | |
207 | { | |
208 | assert (lsa->lock == 0); | |
209 | ||
210 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
6c4f4e6e | 211 | zlog_debug ("LSA: freed %p", (void *)lsa); |
718e3744 | 212 | |
213 | /* Delete LSA data. */ | |
214 | if (lsa->data != NULL) | |
215 | ospf_lsa_data_free (lsa->data); | |
216 | ||
217 | assert (lsa->refresh_list < 0); | |
218 | ||
219 | memset (lsa, 0, sizeof (struct ospf_lsa)); | |
220 | XFREE (MTYPE_OSPF_LSA, lsa); | |
221 | } | |
222 | ||
223 | /* Lock LSA. */ | |
224 | struct ospf_lsa * | |
225 | ospf_lsa_lock (struct ospf_lsa *lsa) | |
226 | { | |
227 | lsa->lock++; | |
228 | return lsa; | |
229 | } | |
230 | ||
231 | /* Unlock LSA. */ | |
232 | void | |
1fe6ed38 | 233 | ospf_lsa_unlock (struct ospf_lsa **lsa) |
718e3744 | 234 | { |
235 | /* This is sanity check. */ | |
1fe6ed38 | 236 | if (!lsa || !*lsa) |
718e3744 | 237 | return; |
238 | ||
1fe6ed38 | 239 | (*lsa)->lock--; |
718e3744 | 240 | |
1fe6ed38 | 241 | assert ((*lsa)->lock >= 0); |
718e3744 | 242 | |
1fe6ed38 | 243 | if ((*lsa)->lock == 0) |
718e3744 | 244 | { |
1fe6ed38 PJ |
245 | assert (CHECK_FLAG ((*lsa)->flags, OSPF_LSA_DISCARD)); |
246 | ospf_lsa_free (*lsa); | |
247 | *lsa = NULL; | |
718e3744 | 248 | } |
249 | } | |
250 | ||
251 | /* Check discard flag. */ | |
252 | void | |
253 | ospf_lsa_discard (struct ospf_lsa *lsa) | |
254 | { | |
255 | if (!CHECK_FLAG (lsa->flags, OSPF_LSA_DISCARD)) | |
256 | { | |
257 | SET_FLAG (lsa->flags, OSPF_LSA_DISCARD); | |
1fe6ed38 | 258 | ospf_lsa_unlock (&lsa); |
718e3744 | 259 | } |
260 | } | |
261 | ||
262 | /* Create LSA data. */ | |
263 | struct lsa_header * | |
264 | ospf_lsa_data_new (size_t size) | |
265 | { | |
393deb9b | 266 | return XCALLOC (MTYPE_OSPF_LSA_DATA, size); |
718e3744 | 267 | } |
268 | ||
269 | /* Duplicate LSA data. */ | |
270 | struct lsa_header * | |
271 | ospf_lsa_data_dup (struct lsa_header *lsah) | |
272 | { | |
273 | struct lsa_header *new; | |
274 | ||
275 | new = ospf_lsa_data_new (ntohs (lsah->length)); | |
276 | memcpy (new, lsah, ntohs (lsah->length)); | |
277 | ||
278 | return new; | |
279 | } | |
280 | ||
281 | /* Free LSA data. */ | |
282 | void | |
283 | ospf_lsa_data_free (struct lsa_header *lsah) | |
284 | { | |
285 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 286 | zlog_debug ("LSA[Type%d:%s]: data freed %p", |
6c4f4e6e | 287 | lsah->type, inet_ntoa (lsah->id), (void *)lsah); |
718e3744 | 288 | |
289 | XFREE (MTYPE_OSPF_LSA_DATA, lsah); | |
290 | } | |
291 | ||
6b0655a2 | 292 | |
718e3744 | 293 | /* LSA general functions. */ |
294 | ||
295 | const char * | |
296 | dump_lsa_key (struct ospf_lsa *lsa) | |
297 | { | |
298 | static char buf[] = { | |
52dc7ee6 | 299 | "Type255,id(255.255.255.255),ar(255.255.255.255)" |
718e3744 | 300 | }; |
301 | struct lsa_header *lsah; | |
302 | ||
303 | if (lsa != NULL && (lsah = lsa->data) != NULL) | |
304 | { | |
305 | char id[INET_ADDRSTRLEN], ar[INET_ADDRSTRLEN]; | |
306 | strcpy (id, inet_ntoa (lsah->id)); | |
307 | strcpy (ar, inet_ntoa (lsah->adv_router)); | |
308 | ||
309 | sprintf (buf, "Type%d,id(%s),ar(%s)", lsah->type, id, ar); | |
310 | } | |
311 | else | |
312 | strcpy (buf, "NULL"); | |
313 | ||
314 | return buf; | |
315 | } | |
316 | ||
317 | u_int32_t | |
318 | lsa_seqnum_increment (struct ospf_lsa *lsa) | |
319 | { | |
320 | u_int32_t seqnum; | |
321 | ||
322 | seqnum = ntohl (lsa->data->ls_seqnum) + 1; | |
323 | ||
324 | return htonl (seqnum); | |
325 | } | |
326 | ||
327 | void | |
328 | lsa_header_set (struct stream *s, u_char options, | |
68980084 | 329 | u_char type, struct in_addr id, struct in_addr router_id) |
718e3744 | 330 | { |
331 | struct lsa_header *lsah; | |
332 | ||
333 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
334 | ||
02d942c9 | 335 | lsah->ls_age = htons (OSPF_LSA_INITIAL_AGE); |
718e3744 | 336 | lsah->options = options; |
337 | lsah->type = type; | |
338 | lsah->id = id; | |
68980084 | 339 | lsah->adv_router = router_id; |
718e3744 | 340 | lsah->ls_seqnum = htonl (OSPF_INITIAL_SEQUENCE_NUMBER); |
341 | ||
9985f83c | 342 | stream_forward_endp (s, OSPF_LSA_HEADER_SIZE); |
718e3744 | 343 | } |
6b0655a2 | 344 | |
68980084 | 345 | |
718e3744 | 346 | /* router-LSA related functions. */ |
347 | /* Get router-LSA flags. */ | |
4dadc291 | 348 | static u_char |
718e3744 | 349 | router_lsa_flags (struct ospf_area *area) |
350 | { | |
351 | u_char flags; | |
352 | ||
68980084 | 353 | flags = area->ospf->flags; |
718e3744 | 354 | |
355 | /* Set virtual link flag. */ | |
356 | if (ospf_full_virtual_nbrs (area)) | |
357 | SET_FLAG (flags, ROUTER_LSA_VIRTUAL); | |
358 | else | |
359 | /* Just sanity check */ | |
360 | UNSET_FLAG (flags, ROUTER_LSA_VIRTUAL); | |
361 | ||
362 | /* Set Shortcut ABR behabiour flag. */ | |
363 | UNSET_FLAG (flags, ROUTER_LSA_SHORTCUT); | |
68980084 | 364 | if (area->ospf->abr_type == OSPF_ABR_SHORTCUT) |
718e3744 | 365 | if (!OSPF_IS_AREA_BACKBONE (area)) |
366 | if ((area->shortcut_configured == OSPF_SHORTCUT_DEFAULT && | |
68980084 | 367 | area->ospf->backbone == NULL) || |
718e3744 | 368 | area->shortcut_configured == OSPF_SHORTCUT_ENABLE) |
369 | SET_FLAG (flags, ROUTER_LSA_SHORTCUT); | |
370 | ||
371 | /* ASBR can't exit in stub area. */ | |
fc787e87 | 372 | if (area->external_routing == OSPF_AREA_STUB) |
942b6c19 | 373 | UNSET_FLAG (flags, ROUTER_LSA_EXTERNAL); |
374 | /* If ASBR set External flag */ | |
375 | else if (IS_OSPF_ASBR (area->ospf)) | |
376 | SET_FLAG (flags, ROUTER_LSA_EXTERNAL); | |
377 | ||
378 | /* Set ABR dependent flags */ | |
379 | if (IS_OSPF_ABR (area->ospf)) | |
380 | { | |
381 | SET_FLAG (flags, ROUTER_LSA_BORDER); | |
942b6c19 | 382 | /* If Area is NSSA and we are both ABR and unconditional translator, |
d4a53d58 | 383 | * set Nt bit to inform other routers. |
942b6c19 | 384 | */ |
d4a53d58 | 385 | if ( (area->external_routing == OSPF_AREA_NSSA) |
386 | && (area->NSSATranslatorRole == OSPF_NSSA_ROLE_ALWAYS)) | |
387 | SET_FLAG (flags, ROUTER_LSA_NT); | |
942b6c19 | 388 | } |
718e3744 | 389 | return flags; |
390 | } | |
391 | ||
392 | /* Lookup neighbor other than myself. | |
393 | And check neighbor count, | |
394 | Point-to-Point link must have only 1 neighbor. */ | |
395 | struct ospf_neighbor * | |
68980084 | 396 | ospf_nbr_lookup_ptop (struct ospf_interface *oi) |
718e3744 | 397 | { |
718e3744 | 398 | struct ospf_neighbor *nbr = NULL; |
68980084 | 399 | struct route_node *rn; |
718e3744 | 400 | |
401 | /* Search neighbor, there must be one of two nbrs. */ | |
68980084 | 402 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) |
403 | if ((nbr = rn->info)) | |
404 | if (!IPV4_ADDR_SAME (&nbr->router_id, &oi->ospf->router_id)) | |
718e3744 | 405 | if (nbr->state == NSM_Full) |
68980084 | 406 | { |
407 | route_unlock_node (rn); | |
408 | break; | |
409 | } | |
718e3744 | 410 | |
411 | /* PtoP link must have only 1 neighbor. */ | |
68980084 | 412 | if (ospf_nbr_count (oi, 0) > 1) |
718e3744 | 413 | zlog_warn ("Point-to-Point link has more than 1 neighobrs."); |
414 | ||
415 | return nbr; | |
416 | } | |
417 | ||
88d6cf37 | 418 | /* Determine cost of link, taking RFC3137 stub-router support into |
419 | * consideration | |
420 | */ | |
421 | static u_int16_t | |
422 | ospf_link_cost (struct ospf_interface *oi) | |
423 | { | |
424 | /* RFC3137 stub router support */ | |
425 | if (!CHECK_FLAG (oi->area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED)) | |
426 | return oi->output_cost; | |
427 | else | |
428 | return OSPF_OUTPUT_COST_INFINITE; | |
429 | } | |
430 | ||
718e3744 | 431 | /* Set a link information. */ |
779adb01 | 432 | static char |
718e3744 | 433 | link_info_set (struct stream *s, struct in_addr id, |
434 | struct in_addr data, u_char type, u_char tos, u_int16_t cost) | |
435 | { | |
779adb01 | 436 | /* LSA stream is initially allocated to OSPF_MAX_LSA_SIZE, suits |
437 | * vast majority of cases. Some rare routers with lots of links need more. | |
438 | * we try accomodate those here. | |
439 | */ | |
440 | if (STREAM_WRITEABLE(s) < OSPF_ROUTER_LSA_LINK_SIZE) | |
441 | { | |
442 | size_t ret = OSPF_MAX_LSA_SIZE; | |
443 | ||
444 | /* Can we enlarge the stream still? */ | |
445 | if (STREAM_SIZE(s) == OSPF_MAX_LSA_SIZE) | |
446 | { | |
447 | /* we futz the size here for simplicity, really we need to account | |
448 | * for just: | |
449 | * IP Header - (sizeof (struct ip)) | |
450 | * OSPF Header - OSPF_HEADER_SIZE | |
451 | * LSA Header - OSPF_LSA_HEADER_SIZE | |
452 | * MD5 auth data, if MD5 is configured - OSPF_AUTH_MD5_SIZE. | |
453 | * | |
454 | * Simpler just to subtract OSPF_MAX_LSA_SIZE though. | |
455 | */ | |
456 | ret = stream_resize (s, OSPF_MAX_PACKET_SIZE - OSPF_MAX_LSA_SIZE); | |
457 | } | |
458 | ||
459 | if (ret == OSPF_MAX_LSA_SIZE) | |
460 | { | |
5372510d | 461 | zlog_warn ("%s: Out of space in LSA stream, left %zd, size %zd", |
779adb01 | 462 | __func__, STREAM_REMAIN (s), STREAM_SIZE (s)); |
463 | return 0; | |
464 | } | |
465 | } | |
466 | ||
718e3744 | 467 | /* TOS based routing is not supported. */ |
468 | stream_put_ipv4 (s, id.s_addr); /* Link ID. */ | |
469 | stream_put_ipv4 (s, data.s_addr); /* Link Data. */ | |
470 | stream_putc (s, type); /* Link Type. */ | |
471 | stream_putc (s, tos); /* TOS = 0. */ | |
472 | stream_putw (s, cost); /* Link Cost. */ | |
779adb01 | 473 | |
474 | return 1; | |
718e3744 | 475 | } |
476 | ||
e4529636 | 477 | /* Describe Point-to-Point link (Section 12.4.1.1). */ |
4dadc291 | 478 | static int |
718e3744 | 479 | lsa_link_ptop_set (struct stream *s, struct ospf_interface *oi) |
480 | { | |
481 | int links = 0; | |
482 | struct ospf_neighbor *nbr; | |
525c1839 | 483 | struct in_addr id, mask, data; |
88d6cf37 | 484 | u_int16_t cost = ospf_link_cost (oi); |
718e3744 | 485 | |
486 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 487 | zlog_debug ("LSA[Type1]: Set link Point-to-Point"); |
718e3744 | 488 | |
68980084 | 489 | if ((nbr = ospf_nbr_lookup_ptop (oi))) |
718e3744 | 490 | if (nbr->state == NSM_Full) |
491 | { | |
525c1839 DS |
492 | if (CHECK_FLAG(oi->connected->flags, ZEBRA_IFA_UNNUMBERED)) |
493 | { | |
494 | /* For unnumbered point-to-point networks, the Link Data field | |
495 | should specify the interface's MIB-II ifIndex value. */ | |
496 | data.s_addr = htonl(oi->ifp->ifindex); | |
497 | links += link_info_set (s, nbr->router_id, data, | |
498 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
499 | } | |
500 | else | |
501 | { | |
502 | links += link_info_set (s, nbr->router_id, | |
503 | oi->address->u.prefix4, | |
504 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
505 | } | |
718e3744 | 506 | } |
507 | ||
525c1839 DS |
508 | /* no need for a stub link for unnumbered interfaces */ |
509 | if (!CHECK_FLAG(oi->connected->flags, ZEBRA_IFA_UNNUMBERED)) | |
510 | { | |
511 | /* Regardless of the state of the neighboring router, we must | |
512 | add a Type 3 link (stub network). | |
513 | N.B. Options 1 & 2 share basically the same logic. */ | |
514 | masklen2ip (oi->address->prefixlen, &mask); | |
515 | id.s_addr = CONNECTED_PREFIX(oi->connected)->u.prefix4.s_addr & mask.s_addr; | |
516 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, | |
517 | oi->output_cost); | |
518 | } | |
519 | ||
718e3744 | 520 | return links; |
521 | } | |
522 | ||
523 | /* Describe Broadcast Link. */ | |
4dadc291 | 524 | static int |
718e3744 | 525 | lsa_link_broadcast_set (struct stream *s, struct ospf_interface *oi) |
526 | { | |
527 | struct ospf_neighbor *dr; | |
528 | struct in_addr id, mask; | |
88d6cf37 | 529 | u_int16_t cost = ospf_link_cost (oi); |
530 | ||
718e3744 | 531 | /* Describe Type 3 Link. */ |
532 | if (oi->state == ISM_Waiting) | |
533 | { | |
cbf435cb CF |
534 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
535 | zlog_debug ("LSA[Type1]: Interface %s is in state Waiting. " | |
536 | "Adding stub interface", oi->ifp->name); | |
718e3744 | 537 | masklen2ip (oi->address->prefixlen, &mask); |
538 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 539 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
540 | oi->output_cost); | |
718e3744 | 541 | } |
542 | ||
543 | dr = ospf_nbr_lookup_by_addr (oi->nbrs, &DR (oi)); | |
544 | /* Describe Type 2 link. */ | |
545 | if (dr && (dr->state == NSM_Full || | |
546 | IPV4_ADDR_SAME (&oi->address->u.prefix4, &DR (oi))) && | |
68980084 | 547 | ospf_nbr_count (oi, NSM_Full) > 0) |
718e3744 | 548 | { |
cbf435cb CF |
549 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
550 | zlog_debug ("LSA[Type1]: Interface %s has a DR. " | |
551 | "Adding transit interface", oi->ifp->name); | |
779adb01 | 552 | return link_info_set (s, DR (oi), oi->address->u.prefix4, |
553 | LSA_LINK_TYPE_TRANSIT, 0, cost); | |
718e3744 | 554 | } |
555 | /* Describe type 3 link. */ | |
556 | else | |
557 | { | |
cbf435cb CF |
558 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
559 | zlog_debug ("LSA[Type1]: Interface %s has no DR. " | |
560 | "Adding stub interface", oi->ifp->name); | |
718e3744 | 561 | masklen2ip (oi->address->prefixlen, &mask); |
562 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 563 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
564 | oi->output_cost); | |
718e3744 | 565 | } |
718e3744 | 566 | } |
567 | ||
4dadc291 | 568 | static int |
718e3744 | 569 | lsa_link_loopback_set (struct stream *s, struct ospf_interface *oi) |
570 | { | |
571 | struct in_addr id, mask; | |
88d6cf37 | 572 | |
718e3744 | 573 | /* Describe Type 3 Link. */ |
574 | if (oi->state != ISM_Loopback) | |
575 | return 0; | |
576 | ||
577 | mask.s_addr = 0xffffffff; | |
578 | id.s_addr = oi->address->u.prefix4.s_addr; | |
a1a5410e | 579 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); |
718e3744 | 580 | } |
581 | ||
582 | /* Describe Virtual Link. */ | |
4dadc291 | 583 | static int |
718e3744 | 584 | lsa_link_virtuallink_set (struct stream *s, struct ospf_interface *oi) |
585 | { | |
586 | struct ospf_neighbor *nbr; | |
88d6cf37 | 587 | u_int16_t cost = ospf_link_cost (oi); |
718e3744 | 588 | |
718e3744 | 589 | if (oi->state == ISM_PointToPoint) |
68980084 | 590 | if ((nbr = ospf_nbr_lookup_ptop (oi))) |
718e3744 | 591 | if (nbr->state == NSM_Full) |
592 | { | |
779adb01 | 593 | return link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
594 | LSA_LINK_TYPE_VIRTUALLINK, 0, cost); | |
718e3744 | 595 | } |
596 | ||
597 | return 0; | |
598 | } | |
599 | ||
600 | #define lsa_link_nbma_set(S,O) lsa_link_broadcast_set (S, O) | |
601 | ||
7afa08da | 602 | /* this function add for support point-to-multipoint ,see rfc2328 |
603 | 12.4.1.4.*/ | |
604 | /* from "edward rrr" <edward_rrr@hotmail.com> | |
605 | http://marc.theaimsgroup.com/?l=zebra&m=100739222210507&w=2 */ | |
4dadc291 | 606 | static int |
68980084 | 607 | lsa_link_ptomp_set (struct stream *s, struct ospf_interface *oi) |
7afa08da | 608 | { |
609 | int links = 0; | |
610 | struct route_node *rn; | |
611 | struct ospf_neighbor *nbr = NULL; | |
612 | struct in_addr id, mask; | |
88d6cf37 | 613 | u_int16_t cost = ospf_link_cost (oi); |
7afa08da | 614 | |
615 | mask.s_addr = 0xffffffff; | |
616 | id.s_addr = oi->address->u.prefix4.s_addr; | |
779adb01 | 617 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); |
7afa08da | 618 | |
1cc8f762 | 619 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 620 | zlog_debug ("PointToMultipoint: running ptomultip_set"); |
7afa08da | 621 | |
622 | /* Search neighbor, */ | |
623 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
624 | if ((nbr = rn->info) != NULL) | |
625 | /* Ignore myself. */ | |
68980084 | 626 | if (!IPV4_ADDR_SAME (&nbr->router_id, &oi->ospf->router_id)) |
7afa08da | 627 | if (nbr->state == NSM_Full) |
628 | ||
629 | { | |
779adb01 | 630 | links += link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
631 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
1cc8f762 | 632 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 633 | zlog_debug ("PointToMultipoint: set link to %s", |
1cc8f762 | 634 | inet_ntoa(oi->address->u.prefix4)); |
7afa08da | 635 | } |
636 | ||
637 | return links; | |
7afa08da | 638 | } |
639 | ||
718e3744 | 640 | /* Set router-LSA link information. */ |
4dadc291 | 641 | static int |
718e3744 | 642 | router_lsa_link_set (struct stream *s, struct ospf_area *area) |
643 | { | |
52dc7ee6 | 644 | struct listnode *node; |
1eb8ef25 | 645 | struct ospf_interface *oi; |
718e3744 | 646 | int links = 0; |
647 | ||
1eb8ef25 | 648 | for (ALL_LIST_ELEMENTS_RO (area->oiflist, node, oi)) |
718e3744 | 649 | { |
718e3744 | 650 | struct interface *ifp = oi->ifp; |
651 | ||
652 | /* Check interface is up, OSPF is enable. */ | |
2e3b2e47 | 653 | if (if_is_operative (ifp)) |
718e3744 | 654 | { |
655 | if (oi->state != ISM_Down) | |
656 | { | |
c81ee5c9 | 657 | oi->lsa_pos_beg = links; |
718e3744 | 658 | /* Describe each link. */ |
659 | switch (oi->type) | |
660 | { | |
661 | case OSPF_IFTYPE_POINTOPOINT: | |
662 | links += lsa_link_ptop_set (s, oi); | |
663 | break; | |
664 | case OSPF_IFTYPE_BROADCAST: | |
665 | links += lsa_link_broadcast_set (s, oi); | |
666 | break; | |
667 | case OSPF_IFTYPE_NBMA: | |
668 | links += lsa_link_nbma_set (s, oi); | |
669 | break; | |
670 | case OSPF_IFTYPE_POINTOMULTIPOINT: | |
68980084 | 671 | links += lsa_link_ptomp_set (s, oi); |
718e3744 | 672 | break; |
673 | case OSPF_IFTYPE_VIRTUALLINK: | |
674 | links += lsa_link_virtuallink_set (s, oi); | |
675 | break; | |
676 | case OSPF_IFTYPE_LOOPBACK: | |
677 | links += lsa_link_loopback_set (s, oi); | |
678 | } | |
c81ee5c9 | 679 | oi->lsa_pos_end = links; |
718e3744 | 680 | } |
681 | } | |
682 | } | |
683 | ||
684 | return links; | |
685 | } | |
686 | ||
687 | /* Set router-LSA body. */ | |
4dadc291 | 688 | static void |
718e3744 | 689 | ospf_router_lsa_body_set (struct stream *s, struct ospf_area *area) |
690 | { | |
691 | unsigned long putp; | |
692 | u_int16_t cnt; | |
693 | ||
694 | /* Set flags. */ | |
695 | stream_putc (s, router_lsa_flags (area)); | |
696 | ||
697 | /* Set Zero fields. */ | |
698 | stream_putc (s, 0); | |
699 | ||
700 | /* Keep pointer to # links. */ | |
9985f83c | 701 | putp = stream_get_endp(s); |
718e3744 | 702 | |
703 | /* Forward word */ | |
704 | stream_putw(s, 0); | |
705 | ||
706 | /* Set all link information. */ | |
707 | cnt = router_lsa_link_set (s, area); | |
708 | ||
709 | /* Set # of links here. */ | |
710 | stream_putw_at (s, putp, cnt); | |
711 | } | |
6b0655a2 | 712 | |
88d6cf37 | 713 | static int |
714 | ospf_stub_router_timer (struct thread *t) | |
715 | { | |
716 | struct ospf_area *area = THREAD_ARG (t); | |
717 | ||
718 | area->t_stub_router = NULL; | |
719 | ||
720 | SET_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
721 | ||
722 | /* clear stub route state and generate router-lsa refresh, don't | |
723 | * clobber an administratively set stub-router state though. | |
724 | */ | |
725 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
726 | return 0; | |
727 | ||
728 | UNSET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
729 | ||
c363d386 | 730 | ospf_router_lsa_update_area (area); |
88d6cf37 | 731 | |
732 | return 0; | |
733 | } | |
718e3744 | 734 | |
f63f06da | 735 | static void |
88d6cf37 | 736 | ospf_stub_router_check (struct ospf_area *area) |
737 | { | |
738 | /* area must either be administratively configured to be stub | |
739 | * or startup-time stub-router must be configured and we must in a pre-stub | |
740 | * state. | |
741 | */ | |
742 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
743 | { | |
744 | SET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
745 | return; | |
746 | } | |
747 | ||
748 | /* not admin-stubbed, check whether startup stubbing is configured and | |
749 | * whether it's not been done yet | |
750 | */ | |
751 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED)) | |
752 | return; | |
753 | ||
754 | if (area->ospf->stub_router_startup_time == OSPF_STUB_ROUTER_UNCONFIGURED) | |
755 | { | |
756 | /* stub-router is hence done forever for this area, even if someone | |
757 | * tries configure it (take effect next restart). | |
758 | */ | |
759 | SET_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
760 | return; | |
761 | } | |
762 | ||
763 | /* startup stub-router configured and not yet done */ | |
764 | SET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
765 | ||
766 | OSPF_AREA_TIMER_ON (area->t_stub_router, ospf_stub_router_timer, | |
767 | area->ospf->stub_router_startup_time); | |
768 | } | |
6b0655a2 | 769 | |
718e3744 | 770 | /* Create new router-LSA. */ |
4dadc291 | 771 | static struct ospf_lsa * |
718e3744 | 772 | ospf_router_lsa_new (struct ospf_area *area) |
773 | { | |
68980084 | 774 | struct ospf *ospf = area->ospf; |
718e3744 | 775 | struct stream *s; |
776 | struct lsa_header *lsah; | |
777 | struct ospf_lsa *new; | |
778 | int length; | |
779 | ||
780 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 781 | zlog_debug ("LSA[Type1]: Create router-LSA instance"); |
718e3744 | 782 | |
88d6cf37 | 783 | /* check whether stub-router is desired, and if this is the first |
784 | * router LSA. | |
785 | */ | |
786 | ospf_stub_router_check (area); | |
787 | ||
718e3744 | 788 | /* Create a stream for LSA. */ |
789 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
718e3744 | 790 | /* Set LSA common header fields. */ |
d4a53d58 | 791 | lsa_header_set (s, LSA_OPTIONS_GET (area) | LSA_OPTIONS_NSSA_GET (area), |
d4a53d58 | 792 | OSPF_ROUTER_LSA, ospf->router_id, ospf->router_id); |
718e3744 | 793 | |
794 | /* Set router-LSA body fields. */ | |
795 | ospf_router_lsa_body_set (s, area); | |
796 | ||
797 | /* Set length. */ | |
798 | length = stream_get_endp (s); | |
779adb01 | 799 | lsah = (struct lsa_header *) STREAM_DATA (s); |
718e3744 | 800 | lsah->length = htons (length); |
801 | ||
802 | /* Now, create OSPF LSA instance. */ | |
c24d602e | 803 | if ( (new = ospf_lsa_new ()) == NULL) |
804 | { | |
805 | zlog_err ("%s: Unable to create new lsa", __func__); | |
806 | return NULL; | |
807 | } | |
808 | ||
718e3744 | 809 | new->area = area; |
f6543138 | 810 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 811 | |
812 | /* Copy LSA data to store, discard stream. */ | |
813 | new->data = ospf_lsa_data_new (length); | |
814 | memcpy (new->data, lsah, length); | |
815 | stream_free (s); | |
816 | ||
817 | return new; | |
818 | } | |
819 | ||
820 | /* Originate Router-LSA. */ | |
88d6cf37 | 821 | static struct ospf_lsa * |
718e3744 | 822 | ospf_router_lsa_originate (struct ospf_area *area) |
823 | { | |
824 | struct ospf_lsa *new; | |
88d6cf37 | 825 | |
718e3744 | 826 | /* Create new router-LSA instance. */ |
c24d602e | 827 | if ( (new = ospf_router_lsa_new (area)) == NULL) |
828 | { | |
829 | zlog_err ("%s: ospf_router_lsa_new returned NULL", __func__); | |
830 | return NULL; | |
831 | } | |
718e3744 | 832 | |
833 | /* Sanity check. */ | |
834 | if (new->data->adv_router.s_addr == 0) | |
835 | { | |
836 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 837 | zlog_debug ("LSA[Type1]: AdvRouter is 0, discard"); |
718e3744 | 838 | ospf_lsa_discard (new); |
839 | return NULL; | |
840 | } | |
841 | ||
842 | /* Install LSA to LSDB. */ | |
68980084 | 843 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 844 | |
845 | /* Update LSA origination count. */ | |
68980084 | 846 | area->ospf->lsa_originate_count++; |
718e3744 | 847 | |
848 | /* Flooding new LSA through area. */ | |
849 | ospf_flood_through_area (area, NULL, new); | |
850 | ||
851 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
852 | { | |
e588f21f | 853 | zlog_debug ("LSA[Type%d:%s]: Originate router-LSA %p", |
6c4f4e6e | 854 | new->data->type, inet_ntoa (new->data->id), (void *)new); |
718e3744 | 855 | ospf_lsa_header_dump (new->data); |
856 | } | |
857 | ||
858 | return new; | |
859 | } | |
860 | ||
861 | /* Refresh router-LSA. */ | |
4dadc291 | 862 | static struct ospf_lsa * |
718e3744 | 863 | ospf_router_lsa_refresh (struct ospf_lsa *lsa) |
864 | { | |
865 | struct ospf_area *area = lsa->area; | |
866 | struct ospf_lsa *new; | |
867 | ||
868 | /* Sanity check. */ | |
869 | assert (lsa->data); | |
870 | ||
871 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 872 | ospf_ls_retransmit_delete_nbr_area (area, lsa); |
718e3744 | 873 | |
c363d386 PJ |
874 | /* Unregister LSA from refresh-list */ |
875 | ospf_refresher_unregister_lsa (area->ospf, lsa); | |
876 | ||
718e3744 | 877 | /* Create new router-LSA instance. */ |
c24d602e | 878 | if ( (new = ospf_router_lsa_new (area)) == NULL) |
879 | { | |
880 | zlog_err ("%s: ospf_router_lsa_new returned NULL", __func__); | |
881 | return NULL; | |
882 | } | |
883 | ||
718e3744 | 884 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); |
885 | ||
68980084 | 886 | ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 887 | |
888 | /* Flood LSA through area. */ | |
889 | ospf_flood_through_area (area, NULL, new); | |
890 | ||
891 | /* Debug logging. */ | |
892 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
893 | { | |
e588f21f | 894 | zlog_debug ("LSA[Type%d:%s]: router-LSA refresh", |
718e3744 | 895 | new->data->type, inet_ntoa (new->data->id)); |
896 | ospf_lsa_header_dump (new->data); | |
897 | } | |
898 | ||
899 | return NULL; | |
900 | } | |
901 | ||
c363d386 PJ |
902 | int |
903 | ospf_router_lsa_update_area (struct ospf_area *area) | |
718e3744 | 904 | { |
718e3744 | 905 | if (IS_DEBUG_OSPF_EVENT) |
c363d386 | 906 | zlog_debug ("[router-LSA]: (router-LSA area update)"); |
718e3744 | 907 | |
908 | /* Now refresh router-LSA. */ | |
909 | if (area->router_lsa_self) | |
c363d386 | 910 | ospf_lsa_refresh (area->ospf, area->router_lsa_self); |
718e3744 | 911 | /* Newly originate router-LSA. */ |
912 | else | |
913 | ospf_router_lsa_originate (area); | |
914 | ||
915 | return 0; | |
916 | } | |
917 | ||
718e3744 | 918 | int |
c363d386 | 919 | ospf_router_lsa_update (struct ospf *ospf) |
718e3744 | 920 | { |
1eb8ef25 | 921 | struct listnode *node, *nnode; |
922 | struct ospf_area *area; | |
718e3744 | 923 | |
924 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 925 | zlog_debug ("Timer[router-LSA Update]: (timer expire)"); |
718e3744 | 926 | |
1eb8ef25 | 927 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 928 | { |
718e3744 | 929 | struct ospf_lsa *lsa = area->router_lsa_self; |
930 | struct router_lsa *rl; | |
eb1ce605 | 931 | const char *area_str; |
718e3744 | 932 | |
933 | /* Keep Area ID string. */ | |
934 | area_str = AREA_NAME (area); | |
935 | ||
936 | /* If LSA not exist in this Area, originate new. */ | |
937 | if (lsa == NULL) | |
938 | { | |
939 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 940 | zlog_debug("LSA[Type1]: Create router-LSA for Area %s", area_str); |
718e3744 | 941 | |
942 | ospf_router_lsa_originate (area); | |
943 | } | |
944 | /* If router-ID is changed, Link ID must change. | |
945 | First flush old LSA, then originate new. */ | |
68980084 | 946 | else if (!IPV4_ADDR_SAME (&lsa->data->id, &ospf->router_id)) |
718e3744 | 947 | { |
948 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 949 | zlog_debug("LSA[Type%d:%s]: Refresh router-LSA for Area %s", |
718e3744 | 950 | lsa->data->type, inet_ntoa (lsa->data->id), area_str); |
dfbd5176 | 951 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 952 | ospf_lsa_flush_area (lsa, area); |
1fe6ed38 | 953 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 954 | area->router_lsa_self = NULL; |
955 | ||
956 | /* Refresh router-LSA, (not install) and flood through area. */ | |
c363d386 | 957 | ospf_router_lsa_update_area (area); |
718e3744 | 958 | } |
959 | else | |
960 | { | |
961 | rl = (struct router_lsa *) lsa->data; | |
962 | /* Refresh router-LSA, (not install) and flood through area. */ | |
68980084 | 963 | if (rl->flags != ospf->flags) |
c363d386 | 964 | ospf_router_lsa_update_area (area); |
718e3744 | 965 | } |
966 | } | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
6b0655a2 | 971 | |
718e3744 | 972 | /* network-LSA related functions. */ |
973 | /* Originate Network-LSA. */ | |
4dadc291 | 974 | static void |
718e3744 | 975 | ospf_network_lsa_body_set (struct stream *s, struct ospf_interface *oi) |
976 | { | |
977 | struct in_addr mask; | |
978 | struct route_node *rn; | |
979 | struct ospf_neighbor *nbr; | |
980 | ||
981 | masklen2ip (oi->address->prefixlen, &mask); | |
982 | stream_put_ipv4 (s, mask.s_addr); | |
983 | ||
984 | /* The network-LSA lists those routers that are fully adjacent to | |
985 | the Designated Router; each fully adjacent router is identified by | |
986 | its OSPF Router ID. The Designated Router includes itself in this | |
987 | list. RFC2328, Section 12.4.2 */ | |
988 | ||
989 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
990 | if ((nbr = rn->info) != NULL) | |
991 | if (nbr->state == NSM_Full || nbr == oi->nbr_self) | |
992 | stream_put_ipv4 (s, nbr->router_id.s_addr); | |
993 | } | |
994 | ||
4dadc291 | 995 | static struct ospf_lsa * |
718e3744 | 996 | ospf_network_lsa_new (struct ospf_interface *oi) |
997 | { | |
998 | struct stream *s; | |
999 | struct ospf_lsa *new; | |
1000 | struct lsa_header *lsah; | |
7eb5b47e | 1001 | struct ospf_if_params *oip; |
718e3744 | 1002 | int length; |
1003 | ||
1004 | /* If there are no neighbours on this network (the net is stub), | |
1005 | the router does not originate network-LSA (see RFC 12.4.2) */ | |
1006 | if (oi->full_nbrs == 0) | |
1007 | return NULL; | |
1008 | ||
1009 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1010 | zlog_debug ("LSA[Type2]: Create network-LSA instance"); |
718e3744 | 1011 | |
1012 | /* Create new stream for LSA. */ | |
1013 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1014 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1015 | ||
1016 | lsa_header_set (s, (OPTIONS (oi) | LSA_OPTIONS_GET (oi->area)), | |
68980084 | 1017 | OSPF_NETWORK_LSA, DR (oi), oi->ospf->router_id); |
718e3744 | 1018 | |
1019 | /* Set network-LSA body fields. */ | |
1020 | ospf_network_lsa_body_set (s, oi); | |
1021 | ||
1022 | /* Set length. */ | |
1023 | length = stream_get_endp (s); | |
1024 | lsah->length = htons (length); | |
1025 | ||
1026 | /* Create OSPF LSA instance. */ | |
c24d602e | 1027 | if ( (new = ospf_lsa_new ()) == NULL) |
1028 | { | |
1029 | zlog_err ("%s: ospf_lsa_new returned NULL", __func__); | |
1030 | return NULL; | |
1031 | } | |
1032 | ||
718e3744 | 1033 | new->area = oi->area; |
f6543138 | 1034 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1035 | |
1036 | /* Copy LSA to store. */ | |
1037 | new->data = ospf_lsa_data_new (length); | |
1038 | memcpy (new->data, lsah, length); | |
1039 | stream_free (s); | |
7eb5b47e PJ |
1040 | |
1041 | /* Remember prior network LSA sequence numbers, even if we stop | |
1042 | * originating one for this oi, to try avoid re-originating LSAs with a | |
1043 | * prior sequence number, and thus speed up adjency forming & convergence. | |
1044 | */ | |
1045 | if ((oip = ospf_lookup_if_params (oi->ifp, oi->address->u.prefix4))) | |
1046 | { | |
1047 | new->data->ls_seqnum = oip->network_lsa_seqnum; | |
1048 | new->data->ls_seqnum = lsa_seqnum_increment (new); | |
1049 | } | |
1050 | else | |
1051 | { | |
1052 | oip = ospf_get_if_params (oi->ifp, oi->address->u.prefix4); | |
1053 | ospf_if_update_params (oi->ifp, oi->address->u.prefix4); | |
1054 | } | |
1055 | oip->network_lsa_seqnum = new->data->ls_seqnum; | |
1056 | ||
718e3744 | 1057 | return new; |
1058 | } | |
1059 | ||
1060 | /* Originate network-LSA. */ | |
c363d386 PJ |
1061 | void |
1062 | ospf_network_lsa_update (struct ospf_interface *oi) | |
718e3744 | 1063 | { |
1064 | struct ospf_lsa *new; | |
c363d386 PJ |
1065 | |
1066 | if (oi->network_lsa_self != NULL) | |
1067 | { | |
1068 | ospf_lsa_refresh (oi->ospf, oi->network_lsa_self); | |
1069 | return; | |
1070 | } | |
1071 | ||
718e3744 | 1072 | /* Create new network-LSA instance. */ |
1073 | new = ospf_network_lsa_new (oi); | |
1074 | if (new == NULL) | |
c363d386 | 1075 | return; |
718e3744 | 1076 | |
1077 | /* Install LSA to LSDB. */ | |
68980084 | 1078 | new = ospf_lsa_install (oi->ospf, oi, new); |
718e3744 | 1079 | |
1080 | /* Update LSA origination count. */ | |
68980084 | 1081 | oi->ospf->lsa_originate_count++; |
718e3744 | 1082 | |
1083 | /* Flooding new LSA through area. */ | |
1084 | ospf_flood_through_area (oi->area, NULL, new); | |
1085 | ||
1086 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1087 | { | |
e588f21f | 1088 | zlog_debug ("LSA[Type%d:%s]: Originate network-LSA %p", |
6c4f4e6e | 1089 | new->data->type, inet_ntoa (new->data->id), (void *)new); |
718e3744 | 1090 | ospf_lsa_header_dump (new->data); |
1091 | } | |
1092 | ||
c363d386 | 1093 | return; |
718e3744 | 1094 | } |
1095 | ||
c363d386 PJ |
1096 | static struct ospf_lsa * |
1097 | ospf_network_lsa_refresh (struct ospf_lsa *lsa) | |
718e3744 | 1098 | { |
1099 | struct ospf_area *area = lsa->area; | |
c363d386 | 1100 | struct ospf_lsa *new, *new2; |
7eb5b47e | 1101 | struct ospf_if_params *oip; |
4dd87df5 | 1102 | struct ospf_interface *oi; |
c363d386 | 1103 | |
718e3744 | 1104 | assert (lsa->data); |
4dd87df5 PJ |
1105 | |
1106 | /* Retrieve the oi for the network LSA */ | |
1107 | oi = ospf_if_lookup_by_local_addr (area->ospf, NULL, lsa->data->id); | |
1108 | if (oi == NULL) | |
1109 | { | |
1110 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1111 | { | |
1112 | zlog_debug ("LSA[Type%d:%s]: network-LSA refresh: " | |
1113 | "no oi found, ick, ignoring.", | |
1114 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
1115 | ospf_lsa_header_dump (lsa->data); | |
1116 | } | |
1117 | return NULL; | |
1118 | } | |
718e3744 | 1119 | /* Delete LSA from neighbor retransmit-list. */ |
68980084 | 1120 | ospf_ls_retransmit_delete_nbr_area (area, lsa); |
718e3744 | 1121 | |
c363d386 PJ |
1122 | /* Unregister LSA from refresh-list */ |
1123 | ospf_refresher_unregister_lsa (area->ospf, lsa); | |
1124 | ||
718e3744 | 1125 | /* Create new network-LSA instance. */ |
1126 | new = ospf_network_lsa_new (oi); | |
1127 | if (new == NULL) | |
c363d386 | 1128 | return NULL; |
7eb5b47e PJ |
1129 | |
1130 | oip = ospf_lookup_if_params (oi->ifp, oi->address->u.prefix4); | |
1131 | assert (oip != NULL); | |
1132 | oip->network_lsa_seqnum = new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
718e3744 | 1133 | |
c363d386 PJ |
1134 | new2 = ospf_lsa_install (area->ospf, oi, new); |
1135 | ||
1136 | assert (new2 == new); | |
1137 | ||
718e3744 | 1138 | /* Flood LSA through aera. */ |
1139 | ospf_flood_through_area (area, NULL, new); | |
1140 | ||
1141 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1142 | { | |
e588f21f | 1143 | zlog_debug ("LSA[Type%d:%s]: network-LSA refresh", |
718e3744 | 1144 | new->data->type, inet_ntoa (new->data->id)); |
1145 | ospf_lsa_header_dump (new->data); | |
1146 | } | |
1147 | ||
c363d386 | 1148 | return new; |
718e3744 | 1149 | } |
6b0655a2 | 1150 | |
4dadc291 | 1151 | static void |
718e3744 | 1152 | stream_put_ospf_metric (struct stream *s, u_int32_t metric_value) |
1153 | { | |
1154 | u_int32_t metric; | |
1155 | char *mp; | |
1156 | ||
1157 | /* Put 0 metric. TOS metric is not supported. */ | |
1158 | metric = htonl (metric_value); | |
1159 | mp = (char *) &metric; | |
1160 | mp++; | |
1161 | stream_put (s, mp, 3); | |
1162 | } | |
1163 | ||
1164 | /* summary-LSA related functions. */ | |
4dadc291 | 1165 | static void |
718e3744 | 1166 | ospf_summary_lsa_body_set (struct stream *s, struct prefix *p, |
1167 | u_int32_t metric) | |
1168 | { | |
1169 | struct in_addr mask; | |
1170 | ||
1171 | masklen2ip (p->prefixlen, &mask); | |
1172 | ||
1173 | /* Put Network Mask. */ | |
1174 | stream_put_ipv4 (s, mask.s_addr); | |
1175 | ||
1176 | /* Set # TOS. */ | |
1177 | stream_putc (s, (u_char) 0); | |
1178 | ||
1179 | /* Set metric. */ | |
1180 | stream_put_ospf_metric (s, metric); | |
1181 | } | |
1182 | ||
4dadc291 | 1183 | static struct ospf_lsa * |
718e3744 | 1184 | ospf_summary_lsa_new (struct ospf_area *area, struct prefix *p, |
1185 | u_int32_t metric, struct in_addr id) | |
1186 | { | |
1187 | struct stream *s; | |
1188 | struct ospf_lsa *new; | |
1189 | struct lsa_header *lsah; | |
1190 | int length; | |
1191 | ||
c24d602e | 1192 | if (id.s_addr == 0xffffffff) |
1193 | { | |
1194 | /* Maybe Link State ID not available. */ | |
1195 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1196 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1197 | OSPF_SUMMARY_LSA); | |
1198 | return NULL; | |
1199 | } | |
1200 | ||
718e3744 | 1201 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 1202 | zlog_debug ("LSA[Type3]: Create summary-LSA instance"); |
718e3744 | 1203 | |
1204 | /* Create new stream for LSA. */ | |
1205 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1206 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1207 | ||
68980084 | 1208 | lsa_header_set (s, LSA_OPTIONS_GET (area), OSPF_SUMMARY_LSA, |
1209 | id, area->ospf->router_id); | |
718e3744 | 1210 | |
1211 | /* Set summary-LSA body fields. */ | |
1212 | ospf_summary_lsa_body_set (s, p, metric); | |
1213 | ||
1214 | /* Set length. */ | |
1215 | length = stream_get_endp (s); | |
1216 | lsah->length = htons (length); | |
1217 | ||
1218 | /* Create OSPF LSA instance. */ | |
1219 | new = ospf_lsa_new (); | |
1220 | new->area = area; | |
f6543138 | 1221 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1222 | |
1223 | /* Copy LSA to store. */ | |
1224 | new->data = ospf_lsa_data_new (length); | |
1225 | memcpy (new->data, lsah, length); | |
1226 | stream_free (s); | |
1227 | ||
1228 | return new; | |
1229 | } | |
1230 | ||
1231 | /* Originate Summary-LSA. */ | |
1232 | struct ospf_lsa * | |
1233 | ospf_summary_lsa_originate (struct prefix_ipv4 *p, u_int32_t metric, | |
1234 | struct ospf_area *area) | |
1235 | { | |
1236 | struct ospf_lsa *new; | |
1237 | struct in_addr id; | |
1238 | ||
68980084 | 1239 | id = ospf_lsa_unique_id (area->ospf, area->lsdb, OSPF_SUMMARY_LSA, p); |
718e3744 | 1240 | |
c24d602e | 1241 | if (id.s_addr == 0xffffffff) |
1242 | { | |
1243 | /* Maybe Link State ID not available. */ | |
1244 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1245 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1246 | OSPF_SUMMARY_LSA); | |
1247 | return NULL; | |
1248 | } | |
1249 | ||
718e3744 | 1250 | /* Create new summary-LSA instance. */ |
c24d602e | 1251 | if ( !(new = ospf_summary_lsa_new (area, (struct prefix *) p, metric, id))) |
1252 | return NULL; | |
718e3744 | 1253 | |
1254 | /* Instlal LSA to LSDB. */ | |
68980084 | 1255 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 1256 | |
1257 | /* Update LSA origination count. */ | |
68980084 | 1258 | area->ospf->lsa_originate_count++; |
718e3744 | 1259 | |
1260 | /* Flooding new LSA through area. */ | |
1261 | ospf_flood_through_area (area, NULL, new); | |
1262 | ||
1263 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1264 | { | |
e588f21f | 1265 | zlog_debug ("LSA[Type%d:%s]: Originate summary-LSA %p", |
6c4f4e6e | 1266 | new->data->type, inet_ntoa (new->data->id), (void *)new); |
718e3744 | 1267 | ospf_lsa_header_dump (new->data); |
1268 | } | |
1269 | ||
1270 | return new; | |
1271 | } | |
1272 | ||
c363d386 | 1273 | static struct ospf_lsa* |
68980084 | 1274 | ospf_summary_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1275 | { |
1276 | struct ospf_lsa *new; | |
1277 | struct summary_lsa *sl; | |
1278 | struct prefix p; | |
1279 | ||
1280 | /* Sanity check. */ | |
1281 | assert (lsa->data); | |
1282 | ||
1283 | sl = (struct summary_lsa *)lsa->data; | |
1284 | p.prefixlen = ip_masklen (sl->mask); | |
1285 | new = ospf_summary_lsa_new (lsa->area, &p, GET_METRIC (sl->metric), | |
1286 | sl->header.id); | |
c24d602e | 1287 | |
1288 | if (!new) | |
1289 | return NULL; | |
1290 | ||
718e3744 | 1291 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); |
718e3744 | 1292 | |
68980084 | 1293 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 1294 | |
1295 | /* Flood LSA through AS. */ | |
1296 | ospf_flood_through_area (new->area, NULL, new); | |
1297 | ||
1298 | /* Debug logging. */ | |
1299 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1300 | { | |
e588f21f | 1301 | zlog_debug ("LSA[Type%d:%s]: summary-LSA refresh", |
718e3744 | 1302 | new->data->type, inet_ntoa (new->data->id)); |
1303 | ospf_lsa_header_dump (new->data); | |
1304 | } | |
1305 | ||
1306 | return new; | |
1307 | } | |
1308 | ||
6b0655a2 | 1309 | |
718e3744 | 1310 | /* summary-ASBR-LSA related functions. */ |
4dadc291 | 1311 | static void |
718e3744 | 1312 | ospf_summary_asbr_lsa_body_set (struct stream *s, struct prefix *p, |
1313 | u_int32_t metric) | |
1314 | { | |
718e3744 | 1315 | /* Put Network Mask. */ |
2345a222 | 1316 | stream_put_ipv4 (s, (u_int32_t) 0); |
718e3744 | 1317 | |
1318 | /* Set # TOS. */ | |
1319 | stream_putc (s, (u_char) 0); | |
1320 | ||
1321 | /* Set metric. */ | |
1322 | stream_put_ospf_metric (s, metric); | |
1323 | } | |
1324 | ||
4dadc291 | 1325 | static struct ospf_lsa * |
718e3744 | 1326 | ospf_summary_asbr_lsa_new (struct ospf_area *area, struct prefix *p, |
1327 | u_int32_t metric, struct in_addr id) | |
1328 | { | |
1329 | struct stream *s; | |
1330 | struct ospf_lsa *new; | |
1331 | struct lsa_header *lsah; | |
1332 | int length; | |
1333 | ||
c24d602e | 1334 | if (id.s_addr == 0xffffffff) |
1335 | { | |
1336 | /* Maybe Link State ID not available. */ | |
1337 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1338 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1339 | OSPF_ASBR_SUMMARY_LSA); | |
1340 | return NULL; | |
1341 | } | |
1342 | ||
718e3744 | 1343 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 1344 | zlog_debug ("LSA[Type3]: Create summary-LSA instance"); |
718e3744 | 1345 | |
1346 | /* Create new stream for LSA. */ | |
1347 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1348 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1349 | ||
68980084 | 1350 | lsa_header_set (s, LSA_OPTIONS_GET (area), OSPF_ASBR_SUMMARY_LSA, |
1351 | id, area->ospf->router_id); | |
718e3744 | 1352 | |
1353 | /* Set summary-LSA body fields. */ | |
1354 | ospf_summary_asbr_lsa_body_set (s, p, metric); | |
1355 | ||
1356 | /* Set length. */ | |
1357 | length = stream_get_endp (s); | |
1358 | lsah->length = htons (length); | |
1359 | ||
1360 | /* Create OSPF LSA instance. */ | |
1361 | new = ospf_lsa_new (); | |
1362 | new->area = area; | |
f6543138 | 1363 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1364 | |
1365 | /* Copy LSA to store. */ | |
1366 | new->data = ospf_lsa_data_new (length); | |
1367 | memcpy (new->data, lsah, length); | |
1368 | stream_free (s); | |
1369 | ||
1370 | return new; | |
1371 | } | |
1372 | ||
1373 | /* Originate summary-ASBR-LSA. */ | |
1374 | struct ospf_lsa * | |
1375 | ospf_summary_asbr_lsa_originate (struct prefix_ipv4 *p, u_int32_t metric, | |
1376 | struct ospf_area *area) | |
1377 | { | |
1378 | struct ospf_lsa *new; | |
1379 | struct in_addr id; | |
1380 | ||
68980084 | 1381 | id = ospf_lsa_unique_id (area->ospf, area->lsdb, OSPF_ASBR_SUMMARY_LSA, p); |
718e3744 | 1382 | |
c24d602e | 1383 | if (id.s_addr == 0xffffffff) |
1384 | { | |
1385 | /* Maybe Link State ID not available. */ | |
1386 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1387 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1388 | OSPF_ASBR_SUMMARY_LSA); | |
1389 | return NULL; | |
1390 | } | |
1391 | ||
718e3744 | 1392 | /* Create new summary-LSA instance. */ |
1393 | new = ospf_summary_asbr_lsa_new (area, (struct prefix *) p, metric, id); | |
c24d602e | 1394 | if (!new) |
1395 | return NULL; | |
718e3744 | 1396 | |
1397 | /* Install LSA to LSDB. */ | |
68980084 | 1398 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 1399 | |
1400 | /* Update LSA origination count. */ | |
68980084 | 1401 | area->ospf->lsa_originate_count++; |
718e3744 | 1402 | |
1403 | /* Flooding new LSA through area. */ | |
1404 | ospf_flood_through_area (area, NULL, new); | |
1405 | ||
1406 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1407 | { | |
e588f21f | 1408 | zlog_debug ("LSA[Type%d:%s]: Originate summary-ASBR-LSA %p", |
6c4f4e6e | 1409 | new->data->type, inet_ntoa (new->data->id), (void *)new); |
718e3744 | 1410 | ospf_lsa_header_dump (new->data); |
1411 | } | |
1412 | ||
1413 | return new; | |
1414 | } | |
1415 | ||
c363d386 | 1416 | static struct ospf_lsa* |
68980084 | 1417 | ospf_summary_asbr_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1418 | { |
1419 | struct ospf_lsa *new; | |
1420 | struct summary_lsa *sl; | |
1421 | struct prefix p; | |
1422 | ||
1423 | /* Sanity check. */ | |
1424 | assert (lsa->data); | |
1425 | ||
1426 | sl = (struct summary_lsa *)lsa->data; | |
1427 | p.prefixlen = ip_masklen (sl->mask); | |
1428 | new = ospf_summary_asbr_lsa_new (lsa->area, &p, GET_METRIC (sl->metric), | |
1429 | sl->header.id); | |
c24d602e | 1430 | if (!new) |
1431 | return NULL; | |
718e3744 | 1432 | |
1433 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
718e3744 | 1434 | |
68980084 | 1435 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 1436 | |
1437 | /* Flood LSA through area. */ | |
1438 | ospf_flood_through_area (new->area, NULL, new); | |
1439 | ||
1440 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1441 | { | |
e588f21f | 1442 | zlog_debug ("LSA[Type%d:%s]: summary-ASBR-LSA refresh", |
718e3744 | 1443 | new->data->type, inet_ntoa (new->data->id)); |
1444 | ospf_lsa_header_dump (new->data); | |
1445 | } | |
1446 | ||
1447 | return new; | |
1448 | } | |
1449 | ||
1450 | /* AS-external-LSA related functions. */ | |
1451 | ||
1452 | /* Get nexthop for AS-external-LSAs. Return nexthop if its interface | |
1453 | is connected, else 0*/ | |
4dadc291 | 1454 | static struct in_addr |
68980084 | 1455 | ospf_external_lsa_nexthop_get (struct ospf *ospf, struct in_addr nexthop) |
718e3744 | 1456 | { |
1457 | struct in_addr fwd; | |
1458 | struct prefix nh; | |
1eb8ef25 | 1459 | struct listnode *node; |
1460 | struct ospf_interface *oi; | |
718e3744 | 1461 | |
1462 | fwd.s_addr = 0; | |
1463 | ||
1464 | if (!nexthop.s_addr) | |
1465 | return fwd; | |
1466 | ||
1467 | /* Check whether nexthop is covered by OSPF network. */ | |
1468 | nh.family = AF_INET; | |
1469 | nh.u.prefix4 = nexthop; | |
1470 | nh.prefixlen = IPV4_MAX_BITLEN; | |
4ca15d4a PJ |
1471 | |
1472 | /* XXX/SCALE: If there were a lot of oi's on an ifp, then it'd be | |
1473 | * better to make use of the per-ifp table of ois. | |
1474 | */ | |
1eb8ef25 | 1475 | for (ALL_LIST_ELEMENTS_RO (ospf->oiflist, node, oi)) |
1476 | if (if_is_operative (oi->ifp)) | |
1477 | if (oi->address->family == AF_INET) | |
1478 | if (prefix_match (oi->address, &nh)) | |
1479 | return nexthop; | |
718e3744 | 1480 | |
1481 | return fwd; | |
1482 | } | |
1483 | ||
718e3744 | 1484 | /* NSSA-external-LSA related functions. */ |
1485 | ||
1486 | /* Get 1st IP connection for Forward Addr */ | |
4dadc291 | 1487 | |
718e3744 | 1488 | struct in_addr |
1489 | ospf_get_ip_from_ifp (struct ospf_interface *oi) | |
1490 | { | |
1491 | struct in_addr fwd; | |
1492 | ||
1493 | fwd.s_addr = 0; | |
1494 | ||
2e3b2e47 | 1495 | if (if_is_operative (oi->ifp)) |
718e3744 | 1496 | return oi->address->u.prefix4; |
1497 | ||
1498 | return fwd; | |
1499 | } | |
1500 | ||
1501 | /* Get 1st IP connection for Forward Addr */ | |
1502 | struct in_addr | |
f2c80652 | 1503 | ospf_get_nssa_ip (struct ospf_area *area) |
718e3744 | 1504 | { |
1505 | struct in_addr fwd; | |
f2c80652 | 1506 | struct in_addr best_default; |
1eb8ef25 | 1507 | struct listnode *node; |
1508 | struct ospf_interface *oi; | |
718e3744 | 1509 | |
1510 | fwd.s_addr = 0; | |
f2c80652 | 1511 | best_default.s_addr = 0; |
718e3744 | 1512 | |
1eb8ef25 | 1513 | for (ALL_LIST_ELEMENTS_RO (area->ospf->oiflist, node, oi)) |
718e3744 | 1514 | { |
2e3b2e47 | 1515 | if (if_is_operative (oi->ifp)) |
718e3744 | 1516 | if (oi->area->external_routing == OSPF_AREA_NSSA) |
68980084 | 1517 | if (oi->address && oi->address->family == AF_INET) |
1518 | { | |
1519 | if (best_default.s_addr == 0) | |
1520 | best_default = oi->address->u.prefix4; | |
1521 | if (oi->area == area) | |
1522 | return oi->address->u.prefix4; | |
f2c80652 | 1523 | } |
718e3744 | 1524 | } |
f2c80652 | 1525 | if (best_default.s_addr != 0) |
1526 | return best_default; | |
718e3744 | 1527 | |
68980084 | 1528 | if (best_default.s_addr != 0) |
1529 | return best_default; | |
1530 | ||
718e3744 | 1531 | return fwd; |
1532 | } | |
beebba75 | 1533 | |
718e3744 | 1534 | #define DEFAULT_DEFAULT_METRIC 20 |
1535 | #define DEFAULT_DEFAULT_ORIGINATE_METRIC 10 | |
1536 | #define DEFAULT_DEFAULT_ALWAYS_METRIC 1 | |
1537 | ||
1538 | #define DEFAULT_METRIC_TYPE EXTERNAL_METRIC_TYPE_2 | |
1539 | ||
1540 | int | |
7c8ff89e | 1541 | metric_type (struct ospf *ospf, u_char src, u_short instance) |
718e3744 | 1542 | { |
7c8ff89e DS |
1543 | struct ospf_redist *red; |
1544 | ||
1545 | red = ospf_redist_lookup(ospf, src, instance); | |
1546 | ||
1547 | return ((!red || red->dmetric.type < 0) ? | |
1548 | DEFAULT_METRIC_TYPE : red->dmetric.type); | |
718e3744 | 1549 | } |
1550 | ||
1551 | int | |
7c8ff89e | 1552 | metric_value (struct ospf *ospf, u_char src, u_short instance) |
718e3744 | 1553 | { |
7c8ff89e DS |
1554 | struct ospf_redist *red; |
1555 | ||
1556 | red = ospf_redist_lookup(ospf, src, instance); | |
1557 | if (!red || red->dmetric.value < 0) | |
718e3744 | 1558 | { |
1559 | if (src == DEFAULT_ROUTE) | |
1560 | { | |
68980084 | 1561 | if (ospf->default_originate == DEFAULT_ORIGINATE_ZEBRA) |
718e3744 | 1562 | return DEFAULT_DEFAULT_ORIGINATE_METRIC; |
1563 | else | |
1564 | return DEFAULT_DEFAULT_ALWAYS_METRIC; | |
1565 | } | |
68980084 | 1566 | else if (ospf->default_metric < 0) |
718e3744 | 1567 | return DEFAULT_DEFAULT_METRIC; |
1568 | else | |
68980084 | 1569 | return ospf->default_metric; |
718e3744 | 1570 | } |
1571 | ||
7c8ff89e | 1572 | return red->dmetric.value; |
718e3744 | 1573 | } |
1574 | ||
1575 | /* Set AS-external-LSA body. */ | |
4dadc291 | 1576 | static void |
68980084 | 1577 | ospf_external_lsa_body_set (struct stream *s, struct external_info *ei, |
1578 | struct ospf *ospf) | |
718e3744 | 1579 | { |
1580 | struct prefix_ipv4 *p = &ei->p; | |
1581 | struct in_addr mask, fwd_addr; | |
1582 | u_int32_t mvalue; | |
1583 | int mtype; | |
1584 | int type; | |
7c8ff89e | 1585 | u_short instance; |
718e3744 | 1586 | |
1587 | /* Put Network Mask. */ | |
1588 | masklen2ip (p->prefixlen, &mask); | |
1589 | stream_put_ipv4 (s, mask.s_addr); | |
1590 | ||
1591 | /* If prefix is default, specify DEFAULT_ROUTE. */ | |
1592 | type = is_prefix_default (&ei->p) ? DEFAULT_ROUTE : ei->type; | |
7c8ff89e | 1593 | instance = is_prefix_default (&ei->p) ? 0 : ei->instance; |
718e3744 | 1594 | |
1595 | mtype = (ROUTEMAP_METRIC_TYPE (ei) != -1) ? | |
7c8ff89e | 1596 | ROUTEMAP_METRIC_TYPE (ei) : metric_type (ospf, type, instance); |
718e3744 | 1597 | |
1598 | mvalue = (ROUTEMAP_METRIC (ei) != -1) ? | |
7c8ff89e | 1599 | ROUTEMAP_METRIC (ei) : metric_value (ospf, type, instance); |
718e3744 | 1600 | |
1601 | /* Put type of external metric. */ | |
1602 | stream_putc (s, (mtype == EXTERNAL_METRIC_TYPE_2 ? 0x80 : 0)); | |
1603 | ||
1604 | /* Put 0 metric. TOS metric is not supported. */ | |
1605 | stream_put_ospf_metric (s, mvalue); | |
1606 | ||
1607 | /* Get forwarding address to nexthop if on the Connection List, else 0. */ | |
68980084 | 1608 | fwd_addr = ospf_external_lsa_nexthop_get (ospf, ei->nexthop); |
718e3744 | 1609 | |
1610 | /* Put forwarding address. */ | |
1611 | stream_put_ipv4 (s, fwd_addr.s_addr); | |
1612 | ||
dc9ffce8 | 1613 | /* Put route tag */ |
0d9551dc | 1614 | stream_putl (s, ei->tag); |
718e3744 | 1615 | } |
1616 | ||
1617 | /* Create new external-LSA. */ | |
4dadc291 | 1618 | static struct ospf_lsa * |
68980084 | 1619 | ospf_external_lsa_new (struct ospf *ospf, |
1620 | struct external_info *ei, struct in_addr *old_id) | |
718e3744 | 1621 | { |
1622 | struct stream *s; | |
1623 | struct lsa_header *lsah; | |
1624 | struct ospf_lsa *new; | |
1625 | struct in_addr id; | |
1626 | int length; | |
1627 | ||
1628 | if (ei == NULL) | |
1629 | { | |
1630 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
ad8d4802 | 1631 | zlog_debug ("LSA[Type5]: External info is NULL, can't originate"); |
718e3744 | 1632 | return NULL; |
1633 | } | |
1634 | ||
1635 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1636 | zlog_debug ("LSA[Type5]: Originate AS-external-LSA instance"); |
718e3744 | 1637 | |
1638 | /* If old Link State ID is specified, refresh LSA with same ID. */ | |
1639 | if (old_id) | |
1640 | id = *old_id; | |
1641 | /* Get Link State with unique ID. */ | |
1642 | else | |
1643 | { | |
68980084 | 1644 | id = ospf_lsa_unique_id (ospf, ospf->lsdb, OSPF_AS_EXTERNAL_LSA, &ei->p); |
718e3744 | 1645 | if (id.s_addr == 0xffffffff) |
1646 | { | |
1647 | /* Maybe Link State ID not available. */ | |
1648 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1649 | zlog_debug ("LSA[Type5]: Link ID not available, can't originate"); |
718e3744 | 1650 | return NULL; |
1651 | } | |
1652 | } | |
1653 | ||
1654 | /* Create new stream for LSA. */ | |
1655 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1656 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1657 | ||
1658 | /* Set LSA common header fields. */ | |
68980084 | 1659 | lsa_header_set (s, OSPF_OPTION_E, OSPF_AS_EXTERNAL_LSA, |
1660 | id, ospf->router_id); | |
718e3744 | 1661 | |
1662 | /* Set AS-external-LSA body fields. */ | |
68980084 | 1663 | ospf_external_lsa_body_set (s, ei, ospf); |
718e3744 | 1664 | |
1665 | /* Set length. */ | |
1666 | length = stream_get_endp (s); | |
1667 | lsah->length = htons (length); | |
1668 | ||
1669 | /* Now, create OSPF LSA instance. */ | |
1670 | new = ospf_lsa_new (); | |
1671 | new->area = NULL; | |
f6543138 | 1672 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_APPROVED | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1673 | |
1674 | /* Copy LSA data to store, discard stream. */ | |
1675 | new->data = ospf_lsa_data_new (length); | |
1676 | memcpy (new->data, lsah, length); | |
1677 | stream_free (s); | |
1678 | ||
1679 | return new; | |
1680 | } | |
1681 | ||
718e3744 | 1682 | /* As Type-7 */ |
4dadc291 | 1683 | static void |
68980084 | 1684 | ospf_install_flood_nssa (struct ospf *ospf, |
1685 | struct ospf_lsa *lsa, struct external_info *ei) | |
718e3744 | 1686 | { |
d4a53d58 | 1687 | struct ospf_lsa *new; |
68980084 | 1688 | struct as_external_lsa *extlsa; |
1eb8ef25 | 1689 | struct ospf_area *area; |
1690 | struct listnode *node, *nnode; | |
718e3744 | 1691 | |
d4a53d58 | 1692 | /* LSA may be a Type-5 originated via translation of a Type-7 LSA |
1693 | * which originated from an NSSA area. In which case it should not be | |
1694 | * flooded back to NSSA areas. | |
1695 | */ | |
1696 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
1697 | return; | |
1698 | ||
718e3744 | 1699 | /* NSSA Originate or Refresh (If anyNSSA) |
1700 | ||
1701 | LSA is self-originated. And just installed as Type-5. | |
1702 | Additionally, install as Type-7 LSDB for every attached NSSA. | |
1703 | ||
1704 | P-Bit controls which ABR performs translation to outside world; If | |
1705 | we are an ABR....do not set the P-bit, because we send the Type-5, | |
1706 | not as the ABR Translator, but as the ASBR owner within the AS! | |
1707 | ||
1708 | If we are NOT ABR, Flood through NSSA as Type-7 w/P-bit set. The | |
1709 | elected ABR Translator will see the P-bit, Translate, and re-flood. | |
1710 | ||
1711 | Later, ABR_TASK and P-bit will scan Type-7 LSDB and translate to | |
1712 | Type-5's to non-NSSA Areas. (it will also attempt a re-install) */ | |
1713 | ||
1eb8ef25 | 1714 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
68980084 | 1715 | { |
0c14ad88 | 1716 | /* Don't install Type-7 LSA's into nonNSSA area */ |
1717 | if (area->external_routing != OSPF_AREA_NSSA) | |
1718 | continue; | |
718e3744 | 1719 | |
68980084 | 1720 | /* make lsa duplicate, lock=1 */ |
d4a53d58 | 1721 | new = ospf_lsa_dup (lsa); |
1722 | new->area = area; | |
1723 | new->data->type = OSPF_AS_NSSA_LSA; | |
718e3744 | 1724 | |
68980084 | 1725 | /* set P-bit if not ABR */ |
020709f9 | 1726 | if (! IS_OSPF_ABR (ospf)) |
68980084 | 1727 | { |
d4a53d58 | 1728 | SET_FLAG(new->data->options, OSPF_OPTION_NP); |
68980084 | 1729 | |
1730 | /* set non-zero FWD ADDR | |
1731 | ||
1732 | draft-ietf-ospf-nssa-update-09.txt | |
1733 | ||
1734 | if the network between the NSSA AS boundary router and the | |
1735 | adjacent AS is advertised into OSPF as an internal OSPF route, | |
1736 | the forwarding address should be the next op address as is cu | |
1737 | currently done with type-5 LSAs. If the intervening network is | |
1738 | not adversited into OSPF as an internal OSPF route and the | |
1739 | type-7 LSA's P-bit is set a forwarding address should be | |
1740 | selected from one of the router's active OSPF inteface addresses | |
1741 | which belong to the NSSA. If no such addresses exist, then | |
1742 | no type-7 LSA's with the P-bit set should originate from this | |
1743 | router. */ | |
1744 | ||
d4a53d58 | 1745 | /* kevinm: not updating lsa anymore, just new */ |
1746 | extlsa = (struct as_external_lsa *)(new->data); | |
68980084 | 1747 | |
1748 | if (extlsa->e[0].fwd_addr.s_addr == 0) | |
1749 | extlsa->e[0].fwd_addr = ospf_get_nssa_ip(area); /* this NSSA area in ifp */ | |
718e3744 | 1750 | |
d748032f | 1751 | if (extlsa->e[0].fwd_addr.s_addr == 0) |
1752 | { | |
1753 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1754 | zlog_debug ("LSA[Type-7]: Could not build FWD-ADDR"); |
1fe6ed38 | 1755 | ospf_lsa_discard (new); |
d748032f | 1756 | return; |
1757 | } | |
f2c80652 | 1758 | } |
718e3744 | 1759 | |
68980084 | 1760 | /* install also as Type-7 */ |
d4a53d58 | 1761 | ospf_lsa_install (ospf, NULL, new); /* Remove Old, Lock New = 2 */ |
68980084 | 1762 | |
1763 | /* will send each copy, lock=2+n */ | |
d4a53d58 | 1764 | ospf_flood_through_as (ospf, NULL, new); /* all attached NSSA's, no AS/STUBs */ |
1765 | } | |
1766 | } | |
1767 | ||
4dadc291 | 1768 | static struct ospf_lsa * |
d4a53d58 | 1769 | ospf_lsa_translated_nssa_new (struct ospf *ospf, |
1770 | struct ospf_lsa *type7) | |
1771 | { | |
1772 | ||
1773 | struct ospf_lsa *new; | |
1774 | struct as_external_lsa *ext, *extnew; | |
1775 | struct external_info ei; | |
1776 | ||
1777 | ext = (struct as_external_lsa *)(type7->data); | |
1778 | ||
1779 | /* need external_info struct, fill in bare minimum */ | |
1780 | ei.p.family = AF_INET; | |
1781 | ei.p.prefix = type7->data->id; | |
1782 | ei.p.prefixlen = ip_masklen (ext->mask); | |
1783 | ei.type = ZEBRA_ROUTE_OSPF; | |
1784 | ei.nexthop = ext->header.adv_router; | |
1785 | ei.route_map_set.metric = -1; | |
1786 | ei.route_map_set.metric_type = -1; | |
1787 | ei.tag = 0; | |
1788 | ||
1789 | if ( (new = ospf_external_lsa_new (ospf, &ei, &type7->data->id)) == NULL) | |
1790 | { | |
1791 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1792 | zlog_debug ("ospf_nssa_translate_originate(): Could not originate " |
d4a53d58 | 1793 | "Translated Type-5 for %s", |
1794 | inet_ntoa (ei.p.prefix)); | |
1795 | return NULL; | |
1796 | } | |
1797 | ||
1798 | extnew = (struct as_external_lsa *)(new->data); | |
1799 | ||
1800 | /* copy over Type-7 data to new */ | |
1801 | extnew->e[0].tos = ext->e[0].tos; | |
1802 | extnew->e[0].route_tag = ext->e[0].route_tag; | |
1803 | extnew->e[0].fwd_addr.s_addr = ext->e[0].fwd_addr.s_addr; | |
1804 | new->data->ls_seqnum = type7->data->ls_seqnum; | |
1805 | ||
1806 | /* add translated flag, checksum and lock new lsa */ | |
1807 | SET_FLAG (new->flags, OSPF_LSA_LOCAL_XLT); /* Translated from 7 */ | |
d4a53d58 | 1808 | new = ospf_lsa_lock (new); |
1809 | ||
1810 | return new; | |
1811 | } | |
1812 | ||
d4a53d58 | 1813 | /* Originate Translated Type-5 for supplied Type-7 NSSA LSA */ |
1814 | struct ospf_lsa * | |
1815 | ospf_translated_nssa_originate (struct ospf *ospf, struct ospf_lsa *type7) | |
1816 | { | |
1817 | struct ospf_lsa *new; | |
1818 | struct as_external_lsa *extnew; | |
1819 | ||
1820 | /* we cant use ospf_external_lsa_originate() as we need to set | |
1821 | * the OSPF_LSA_LOCAL_XLT flag, must originate by hand | |
1822 | */ | |
1823 | ||
1824 | if ( (new = ospf_lsa_translated_nssa_new (ospf, type7)) == NULL) | |
1825 | { | |
1826 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1827 | zlog_debug ("ospf_translated_nssa_originate(): Could not translate " |
d4a53d58 | 1828 | "Type-7, Id %s, to Type-5", |
1829 | inet_ntoa (type7->data->id)); | |
1830 | return NULL; | |
1831 | } | |
1832 | ||
1833 | extnew = (struct as_external_lsa *)new; | |
1834 | ||
1835 | if (IS_DEBUG_OSPF_NSSA) | |
1836 | { | |
e588f21f | 1837 | zlog_debug ("ospf_translated_nssa_originate(): " |
d4a53d58 | 1838 | "translated Type 7, installed:"); |
1839 | ospf_lsa_header_dump (new->data); | |
e588f21f | 1840 | zlog_debug (" Network mask: %d",ip_masklen (extnew->mask)); |
1841 | zlog_debug (" Forward addr: %s", inet_ntoa (extnew->e[0].fwd_addr)); | |
d4a53d58 | 1842 | } |
1843 | ||
1844 | if ( (new = ospf_lsa_install (ospf, NULL, new)) == NULL) | |
1845 | { | |
8c9ed279 | 1846 | if (IS_DEBUG_OSPF_NSSA) |
e588f21f | 1847 | zlog_debug ("ospf_lsa_translated_nssa_originate(): " |
d4a53d58 | 1848 | "Could not install LSA " |
1849 | "id %s", inet_ntoa (type7->data->id)); | |
1850 | return NULL; | |
1851 | } | |
1852 | ||
1853 | ospf->lsa_originate_count++; | |
1854 | ospf_flood_through_as (ospf, NULL, new); | |
1855 | ||
1856 | return new; | |
1857 | } | |
1858 | ||
1859 | /* Refresh Translated from NSSA AS-external-LSA. */ | |
1860 | struct ospf_lsa * | |
1861 | ospf_translated_nssa_refresh (struct ospf *ospf, struct ospf_lsa *type7, | |
1862 | struct ospf_lsa *type5) | |
1863 | { | |
1864 | struct ospf_lsa *new = NULL; | |
1865 | ||
1866 | /* Sanity checks. */ | |
1867 | assert (type7 || type5); | |
ae128056 | 1868 | if (!(type7 || type5)) |
e54e6e57 | 1869 | return NULL; |
d4a53d58 | 1870 | if (type7) |
1871 | assert (type7->data); | |
1872 | if (type5) | |
1873 | assert (type5->data); | |
1874 | assert (ospf->anyNSSA); | |
1875 | ||
1876 | /* get required data according to what has been given */ | |
1877 | if (type7 && type5 == NULL) | |
1878 | { | |
1879 | /* find the translated Type-5 for this Type-7 */ | |
1880 | struct as_external_lsa *ext = (struct as_external_lsa *)(type7->data); | |
1881 | struct prefix_ipv4 p = | |
1882 | { | |
1883 | .prefix = type7->data->id, | |
1884 | .prefixlen = ip_masklen (ext->mask), | |
1885 | .family = AF_INET, | |
1886 | }; | |
1887 | ||
1888 | type5 = ospf_external_info_find_lsa (ospf, &p); | |
1889 | } | |
1890 | else if (type5 && type7 == NULL) | |
1891 | { | |
1892 | /* find the type-7 from which supplied type-5 was translated, | |
1893 | * ie find first type-7 with same LSA Id. | |
1894 | */ | |
1eb8ef25 | 1895 | struct listnode *ln, *lnn; |
d4a53d58 | 1896 | struct route_node *rn; |
1897 | struct ospf_lsa *lsa; | |
1898 | struct ospf_area *area; | |
1899 | ||
1eb8ef25 | 1900 | for (ALL_LIST_ELEMENTS (ospf->areas, ln, lnn, area)) |
d4a53d58 | 1901 | { |
1902 | if (area->external_routing != OSPF_AREA_NSSA | |
1903 | && !type7) | |
1904 | continue; | |
1905 | ||
1906 | LSDB_LOOP (NSSA_LSDB(area), rn, lsa) | |
1907 | { | |
1908 | if (lsa->data->id.s_addr == type5->data->id.s_addr) | |
1909 | { | |
1910 | type7 = lsa; | |
1911 | break; | |
1912 | } | |
1913 | } | |
1914 | } | |
68980084 | 1915 | } |
d4a53d58 | 1916 | |
1917 | /* do we have type7? */ | |
1918 | if (!type7) | |
1919 | { | |
1920 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1921 | zlog_debug ("ospf_translated_nssa_refresh(): no Type-7 found for " |
d4a53d58 | 1922 | "Type-5 LSA Id %s", |
e54e6e57 | 1923 | inet_ntoa (type5->data->id)); |
d4a53d58 | 1924 | return NULL; |
1925 | } | |
1926 | ||
1927 | /* do we have valid translated type5? */ | |
1928 | if (type5 == NULL || !CHECK_FLAG (type5->flags, OSPF_LSA_LOCAL_XLT) ) | |
1929 | { | |
1930 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1931 | zlog_debug ("ospf_translated_nssa_refresh(): No translated Type-5 " |
d4a53d58 | 1932 | "found for Type-7 with Id %s", |
1933 | inet_ntoa (type7->data->id)); | |
1934 | return NULL; | |
1935 | } | |
1936 | ||
1937 | /* Delete LSA from neighbor retransmit-list. */ | |
1938 | ospf_ls_retransmit_delete_nbr_as (ospf, type5); | |
1939 | ||
1940 | /* create new translated LSA */ | |
1941 | if ( (new = ospf_lsa_translated_nssa_new (ospf, type7)) == NULL) | |
1942 | { | |
1943 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1944 | zlog_debug ("ospf_translated_nssa_refresh(): Could not translate " |
d4a53d58 | 1945 | "Type-7 for %s to Type-5", |
1946 | inet_ntoa (type7->data->id)); | |
1947 | return NULL; | |
1948 | } | |
1949 | ||
1950 | if ( !(new = ospf_lsa_install (ospf, NULL, new)) ) | |
1951 | { | |
1952 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1953 | zlog_debug ("ospf_translated_nssa_refresh(): Could not install " |
d4a53d58 | 1954 | "translated LSA, Id %s", |
5db95bc2 | 1955 | inet_ntoa (type7->data->id)); |
d4a53d58 | 1956 | return NULL; |
1957 | } | |
1958 | ||
1959 | /* Flood LSA through area. */ | |
1960 | ospf_flood_through_as (ospf, NULL, new); | |
1961 | ||
1962 | return new; | |
718e3744 | 1963 | } |
718e3744 | 1964 | |
1965 | int | |
1966 | is_prefix_default (struct prefix_ipv4 *p) | |
1967 | { | |
1968 | struct prefix_ipv4 q; | |
1969 | ||
1970 | q.family = AF_INET; | |
1971 | q.prefix.s_addr = 0; | |
1972 | q.prefixlen = 0; | |
1973 | ||
1974 | return prefix_same ((struct prefix *) p, (struct prefix *) &q); | |
1975 | } | |
1976 | ||
1977 | /* Originate an AS-external-LSA, install and flood. */ | |
1978 | struct ospf_lsa * | |
68980084 | 1979 | ospf_external_lsa_originate (struct ospf *ospf, struct external_info *ei) |
718e3744 | 1980 | { |
1981 | struct ospf_lsa *new; | |
1982 | ||
1983 | /* Added for NSSA project.... | |
1984 | ||
1985 | External LSAs are originated in ASBRs as usual, but for NSSA systems. | |
1986 | there is the global Type-5 LSDB and a Type-7 LSDB installed for | |
1987 | every area. The Type-7's are flooded to every IR and every ABR; We | |
1988 | install the Type-5 LSDB so that the normal "refresh" code operates | |
1989 | as usual, and flag them as not used during ASE calculations. The | |
1990 | Type-7 LSDB is used for calculations. Each Type-7 has a Forwarding | |
1991 | Address of non-zero. | |
1992 | ||
1993 | If an ABR is the elected NSSA translator, following SPF and during | |
1994 | the ABR task it will translate all the scanned Type-7's, with P-bit | |
1995 | ON and not-self generated, and translate to Type-5's throughout the | |
1996 | non-NSSA/STUB AS. | |
1997 | ||
1998 | A difference in operation depends whether this ASBR is an ABR | |
1999 | or not. If not an ABR, the P-bit is ON, to indicate that any | |
2000 | elected NSSA-ABR can perform its translation. | |
2001 | ||
2002 | If an ABR, the P-bit is OFF; No ABR will perform translation and | |
2003 | this ASBR will flood the Type-5 LSA as usual. | |
2004 | ||
2005 | For the case where this ASBR is not an ABR, the ASE calculations | |
2006 | are based on the Type-5 LSDB; The Type-7 LSDB exists just to | |
2007 | demonstrate to the user that there are LSA's that belong to any | |
2008 | attached NSSA. | |
2009 | ||
2010 | Finally, it just so happens that when the ABR is translating every | |
2011 | Type-7 into Type-5, it installs it into the Type-5 LSDB as an | |
2012 | approved Type-5 (translated from Type-7); at the end of translation | |
2013 | if any Translated Type-5's remain unapproved, then they must be | |
2014 | flushed from the AS. | |
2015 | ||
2016 | */ | |
2017 | ||
2018 | /* Check the AS-external-LSA should be originated. */ | |
68980084 | 2019 | if (!ospf_redistribute_check (ospf, ei, NULL)) |
718e3744 | 2020 | return NULL; |
2021 | ||
2022 | /* Create new AS-external-LSA instance. */ | |
68980084 | 2023 | if ((new = ospf_external_lsa_new (ospf, ei, NULL)) == NULL) |
718e3744 | 2024 | { |
2025 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2026 | zlog_debug ("LSA[Type5:%s]: Could not originate AS-external-LSA", |
718e3744 | 2027 | inet_ntoa (ei->p.prefix)); |
2028 | return NULL; | |
2029 | } | |
2030 | ||
2031 | /* Install newly created LSA into Type-5 LSDB, lock = 1. */ | |
68980084 | 2032 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 2033 | |
2034 | /* Update LSA origination count. */ | |
68980084 | 2035 | ospf->lsa_originate_count++; |
718e3744 | 2036 | |
2037 | /* Flooding new LSA. only to AS (non-NSSA/STUB) */ | |
68980084 | 2038 | ospf_flood_through_as (ospf, NULL, new); |
718e3744 | 2039 | |
718e3744 | 2040 | /* If there is any attached NSSA, do special handling */ |
d4a53d58 | 2041 | if (ospf->anyNSSA && |
2042 | /* stay away from translated LSAs! */ | |
2043 | !(CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT))) | |
68980084 | 2044 | ospf_install_flood_nssa (ospf, new, ei); /* Install/Flood Type-7 to all NSSAs */ |
718e3744 | 2045 | |
2046 | /* Debug logging. */ | |
2047 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2048 | { | |
e588f21f | 2049 | zlog_debug ("LSA[Type%d:%s]: Originate AS-external-LSA %p", |
6c4f4e6e | 2050 | new->data->type, inet_ntoa (new->data->id), (void *)new); |
718e3744 | 2051 | ospf_lsa_header_dump (new->data); |
2052 | } | |
2053 | ||
2054 | return new; | |
2055 | } | |
2056 | ||
2057 | /* Originate AS-external-LSA from external info with initial flag. */ | |
2058 | int | |
68980084 | 2059 | ospf_external_lsa_originate_timer (struct thread *thread) |
718e3744 | 2060 | { |
68980084 | 2061 | struct ospf *ospf = THREAD_ARG (thread); |
718e3744 | 2062 | struct route_node *rn; |
2063 | struct external_info *ei; | |
2064 | struct route_table *rt; | |
68980084 | 2065 | int type = THREAD_VAL (thread); |
7c8ff89e DS |
2066 | struct list *ext_list; |
2067 | struct listnode *node; | |
2068 | struct ospf_external *ext; | |
718e3744 | 2069 | |
68980084 | 2070 | ospf->t_external_lsa = NULL; |
718e3744 | 2071 | |
7c8ff89e DS |
2072 | ext_list = om->external[type]; |
2073 | if (!ext_list) | |
2074 | return 0; | |
2075 | ||
2076 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) | |
2077 | /* Originate As-external-LSA from all type of distribute source. */ | |
2078 | if ((rt = ext->external_info)) | |
2079 | for (rn = route_top (rt); rn; rn = route_next (rn)) | |
2080 | if ((ei = rn->info) != NULL) | |
2081 | if (!is_prefix_default ((struct prefix_ipv4 *)&ei->p)) | |
2082 | if (!ospf_external_lsa_originate (ospf, ei)) | |
2083 | zlog_warn ("LSA: AS-external-LSA was not originated."); | |
2084 | ||
718e3744 | 2085 | return 0; |
2086 | } | |
2087 | ||
4dadc291 | 2088 | static struct external_info * |
020709f9 | 2089 | ospf_default_external_info (struct ospf *ospf) |
718e3744 | 2090 | { |
2091 | int type; | |
2092 | struct route_node *rn; | |
2093 | struct prefix_ipv4 p; | |
2094 | ||
2095 | p.family = AF_INET; | |
2096 | p.prefix.s_addr = 0; | |
2097 | p.prefixlen = 0; | |
2098 | ||
2099 | /* First, lookup redistributed default route. */ | |
2100 | for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) | |
7c8ff89e DS |
2101 | { |
2102 | struct list *ext_list; | |
2103 | struct listnode *node; | |
2104 | struct ospf_external *ext; | |
2105 | ||
2106 | if (type == ZEBRA_ROUTE_OSPF) | |
2107 | continue; | |
2108 | ||
2109 | ext_list = om->external[type]; | |
2110 | if (!ext_list) | |
2111 | continue; | |
2112 | ||
2113 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) | |
2114 | { | |
2115 | rn = route_node_lookup (ext->external_info, (struct prefix *) &p); | |
2116 | if (rn != NULL) | |
2117 | { | |
2118 | route_unlock_node (rn); | |
2119 | assert (rn->info); | |
2120 | if (ospf_redistribute_check (ospf, rn->info, NULL)) | |
2121 | return rn->info; | |
2122 | } | |
2123 | } | |
2124 | } | |
718e3744 | 2125 | |
2126 | return NULL; | |
2127 | } | |
2128 | ||
2129 | int | |
68980084 | 2130 | ospf_default_originate_timer (struct thread *thread) |
718e3744 | 2131 | { |
718e3744 | 2132 | struct prefix_ipv4 p; |
2133 | struct in_addr nexthop; | |
2134 | struct external_info *ei; | |
020709f9 | 2135 | struct ospf *ospf; |
718e3744 | 2136 | |
4021b60a | 2137 | ospf = THREAD_ARG (thread); |
718e3744 | 2138 | |
2139 | p.family = AF_INET; | |
2140 | p.prefix.s_addr = 0; | |
2141 | p.prefixlen = 0; | |
2142 | ||
4021b60a | 2143 | if (ospf->default_originate == DEFAULT_ORIGINATE_ALWAYS) |
718e3744 | 2144 | { |
2145 | /* If there is no default route via redistribute, | |
2146 | then originate AS-external-LSA with nexthop 0 (self). */ | |
2147 | nexthop.s_addr = 0; | |
7c8ff89e | 2148 | ospf_external_info_add (DEFAULT_ROUTE, 0, p, 0, nexthop, 0); |
718e3744 | 2149 | } |
2150 | ||
020709f9 | 2151 | if ((ei = ospf_default_external_info (ospf))) |
68980084 | 2152 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2153 | |
2154 | return 0; | |
2155 | } | |
2156 | ||
645878f1 | 2157 | /* Flush any NSSA LSAs for given prefix */ |
2158 | void | |
2159 | ospf_nssa_lsa_flush (struct ospf *ospf, struct prefix_ipv4 *p) | |
2160 | { | |
1eb8ef25 | 2161 | struct listnode *node, *nnode; |
645878f1 | 2162 | struct ospf_lsa *lsa; |
2163 | struct ospf_area *area; | |
2164 | ||
1eb8ef25 | 2165 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
645878f1 | 2166 | { |
1eb8ef25 | 2167 | if (area->external_routing == OSPF_AREA_NSSA) |
d748032f | 2168 | { |
2169 | if (!(lsa = ospf_lsa_lookup (area, OSPF_AS_NSSA_LSA, p->prefix, | |
2170 | ospf->router_id))) | |
2171 | { | |
2172 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2173 | zlog_debug ("LSA: There is no such AS-NSSA-LSA %s/%d in LSDB", |
d748032f | 2174 | inet_ntoa (p->prefix), p->prefixlen); |
2175 | continue; | |
2176 | } | |
2177 | ospf_ls_retransmit_delete_nbr_area (area, lsa); | |
2178 | if (!IS_LSA_MAXAGE (lsa)) | |
2179 | { | |
2180 | ospf_refresher_unregister_lsa (ospf, lsa); | |
2181 | ospf_lsa_flush_area (lsa, area); | |
2182 | } | |
2183 | } | |
645878f1 | 2184 | } |
2185 | } | |
645878f1 | 2186 | |
718e3744 | 2187 | /* Flush an AS-external-LSA from LSDB and routing domain. */ |
2188 | void | |
68980084 | 2189 | ospf_external_lsa_flush (struct ospf *ospf, |
2190 | u_char type, struct prefix_ipv4 *p, | |
b892f1dd | 2191 | ifindex_t ifindex /*, struct in_addr nexthop */) |
718e3744 | 2192 | { |
2193 | struct ospf_lsa *lsa; | |
2194 | ||
2195 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2196 | zlog_debug ("LSA: Flushing AS-external-LSA %s/%d", |
718e3744 | 2197 | inet_ntoa (p->prefix), p->prefixlen); |
2198 | ||
2199 | /* First lookup LSA from LSDB. */ | |
68980084 | 2200 | if (!(lsa = ospf_external_info_find_lsa (ospf, p))) |
718e3744 | 2201 | { |
2202 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2203 | zlog_debug ("LSA: There is no such AS-external-LSA %s/%d in LSDB", |
718e3744 | 2204 | inet_ntoa (p->prefix), p->prefixlen); |
2205 | return; | |
2206 | } | |
beebba75 | 2207 | |
d4a53d58 | 2208 | /* If LSA is selforiginated, not a translated LSA, and there is |
2209 | * NSSA area, flush Type-7 LSA's at first. | |
2210 | */ | |
2211 | if (IS_LSA_SELF(lsa) && (ospf->anyNSSA) | |
2212 | && !(CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT))) | |
d748032f | 2213 | ospf_nssa_lsa_flush (ospf, p); |
718e3744 | 2214 | |
2215 | /* Sweep LSA from Link State Retransmit List. */ | |
68980084 | 2216 | ospf_ls_retransmit_delete_nbr_as (ospf, lsa); |
718e3744 | 2217 | |
2218 | /* There must be no self-originated LSA in rtrs_external. */ | |
2219 | #if 0 | |
2220 | /* Remove External route from Zebra. */ | |
2221 | ospf_zebra_delete ((struct prefix_ipv4 *) p, &nexthop); | |
2222 | #endif | |
2223 | ||
2224 | if (!IS_LSA_MAXAGE (lsa)) | |
2225 | { | |
2226 | /* Unregister LSA from Refresh queue. */ | |
68980084 | 2227 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 2228 | |
2229 | /* Flush AS-external-LSA through AS. */ | |
68980084 | 2230 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 2231 | } |
2232 | ||
2233 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2234 | zlog_debug ("ospf_external_lsa_flush(): stop"); |
718e3744 | 2235 | } |
2236 | ||
2237 | void | |
68980084 | 2238 | ospf_external_lsa_refresh_default (struct ospf *ospf) |
718e3744 | 2239 | { |
2240 | struct prefix_ipv4 p; | |
2241 | struct external_info *ei; | |
2242 | struct ospf_lsa *lsa; | |
2243 | ||
2244 | p.family = AF_INET; | |
2245 | p.prefixlen = 0; | |
2246 | p.prefix.s_addr = 0; | |
2247 | ||
020709f9 | 2248 | ei = ospf_default_external_info (ospf); |
68980084 | 2249 | lsa = ospf_external_info_find_lsa (ospf, &p); |
718e3744 | 2250 | |
2251 | if (ei) | |
2252 | { | |
2253 | if (lsa) | |
2254 | { | |
2255 | if (IS_DEBUG_OSPF_EVENT) | |
6c4f4e6e DL |
2256 | zlog_debug ("LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p", |
2257 | (void *)lsa); | |
68980084 | 2258 | ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_FORCE); |
718e3744 | 2259 | } |
2260 | else | |
2261 | { | |
2262 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2263 | zlog_debug ("LSA[Type5:0.0.0.0]: Originate AS-external-LSA"); |
68980084 | 2264 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2265 | } |
2266 | } | |
2267 | else | |
2268 | { | |
2269 | if (lsa) | |
2270 | { | |
2271 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2272 | zlog_debug ("LSA[Type5:0.0.0.0]: Flush AS-external-LSA"); |
dfbd5176 | 2273 | ospf_refresher_unregister_lsa (ospf, lsa); |
68980084 | 2274 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 2275 | } |
2276 | } | |
2277 | } | |
2278 | ||
2279 | void | |
7c8ff89e DS |
2280 | ospf_external_lsa_refresh_type (struct ospf *ospf, u_char type, u_short instance, |
2281 | int force) | |
718e3744 | 2282 | { |
2283 | struct route_node *rn; | |
2284 | struct external_info *ei; | |
7c8ff89e | 2285 | struct ospf_external *ext; |
718e3744 | 2286 | |
2287 | if (type != DEFAULT_ROUTE) | |
7c8ff89e DS |
2288 | if ((ext = ospf_external_lookup(type, instance)) && |
2289 | EXTERNAL_INFO (ext)) | |
718e3744 | 2290 | /* Refresh each redistributed AS-external-LSAs. */ |
7c8ff89e | 2291 | for (rn = route_top (EXTERNAL_INFO (ext)); rn; rn = route_next (rn)) |
718e3744 | 2292 | if ((ei = rn->info)) |
2293 | if (!is_prefix_default (&ei->p)) | |
2294 | { | |
2295 | struct ospf_lsa *lsa; | |
2296 | ||
68980084 | 2297 | if ((lsa = ospf_external_info_find_lsa (ospf, &ei->p))) |
2298 | ospf_external_lsa_refresh (ospf, lsa, ei, force); | |
718e3744 | 2299 | else |
68980084 | 2300 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2301 | } |
2302 | } | |
2303 | ||
2304 | /* Refresh AS-external-LSA. */ | |
c363d386 | 2305 | struct ospf_lsa * |
68980084 | 2306 | ospf_external_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa, |
718e3744 | 2307 | struct external_info *ei, int force) |
2308 | { | |
2309 | struct ospf_lsa *new; | |
2310 | int changed; | |
2311 | ||
2312 | /* Check the AS-external-LSA should be originated. */ | |
68980084 | 2313 | if (!ospf_redistribute_check (ospf, ei, &changed)) |
718e3744 | 2314 | { |
d4a53d58 | 2315 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 2316 | zlog_debug ("LSA[Type%d:%s]: Could not be refreshed, " |
d4a53d58 | 2317 | "redist check fail", |
2318 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
68980084 | 2319 | ospf_external_lsa_flush (ospf, ei->type, &ei->p, |
5339cfdb | 2320 | ei->ifindex /*, ei->nexthop */); |
c363d386 | 2321 | return NULL; |
718e3744 | 2322 | } |
2323 | ||
2324 | if (!changed && !force) | |
d4a53d58 | 2325 | { |
2326 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 2327 | zlog_debug ("LSA[Type%d:%s]: Not refreshed, not changed/forced", |
d4a53d58 | 2328 | lsa->data->type, inet_ntoa (lsa->data->id)); |
c363d386 | 2329 | return NULL; |
d4a53d58 | 2330 | } |
718e3744 | 2331 | |
2332 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 2333 | ospf_ls_retransmit_delete_nbr_as (ospf, lsa); |
718e3744 | 2334 | |
2335 | /* Unregister AS-external-LSA from refresh-list. */ | |
68980084 | 2336 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 2337 | |
68980084 | 2338 | new = ospf_external_lsa_new (ospf, ei, &lsa->data->id); |
718e3744 | 2339 | |
2340 | if (new == NULL) | |
2341 | { | |
2342 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 2343 | zlog_debug ("LSA[Type%d:%s]: Could not be refreshed", lsa->data->type, |
718e3744 | 2344 | inet_ntoa (lsa->data->id)); |
c363d386 | 2345 | return NULL; |
718e3744 | 2346 | } |
2347 | ||
2348 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
2349 | ||
68980084 | 2350 | ospf_lsa_install (ospf, NULL, new); /* As type-5. */ |
718e3744 | 2351 | |
2352 | /* Flood LSA through AS. */ | |
68980084 | 2353 | ospf_flood_through_as (ospf, NULL, new); |
718e3744 | 2354 | |
718e3744 | 2355 | /* If any attached NSSA, install as Type-7, flood to all NSSA Areas */ |
d4a53d58 | 2356 | if (ospf->anyNSSA && !(CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT))) |
68980084 | 2357 | ospf_install_flood_nssa (ospf, new, ei); /* Install/Flood per new rules */ |
718e3744 | 2358 | |
d4a53d58 | 2359 | /* Register self-originated LSA to refresh queue. |
2360 | * Translated LSAs should not be registered, but refreshed upon | |
2361 | * refresh of the Type-7 | |
2362 | */ | |
2363 | if ( !CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT) ) | |
2364 | ospf_refresher_register_lsa (ospf, new); | |
718e3744 | 2365 | |
2366 | /* Debug logging. */ | |
2367 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2368 | { | |
e588f21f | 2369 | zlog_debug ("LSA[Type%d:%s]: AS-external-LSA refresh", |
d4a53d58 | 2370 | new->data->type, inet_ntoa (new->data->id)); |
718e3744 | 2371 | ospf_lsa_header_dump (new->data); |
2372 | } | |
2373 | ||
c363d386 | 2374 | return new; |
718e3744 | 2375 | } |
2376 | ||
6b0655a2 | 2377 | |
718e3744 | 2378 | /* LSA installation functions. */ |
2379 | ||
2380 | /* Install router-LSA to an area. */ | |
4dadc291 | 2381 | static struct ospf_lsa * |
c363d386 PJ |
2382 | ospf_router_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2383 | int rt_recalc) | |
718e3744 | 2384 | { |
2385 | struct ospf_area *area = new->area; | |
2386 | ||
2387 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2388 | The entire routing table must be recalculated, starting with | |
2389 | the shortest path calculations for each area (not just the | |
2390 | area whose link-state database has changed). | |
2391 | */ | |
718e3744 | 2392 | |
5996e0df | 2393 | if (IS_LSA_SELF (new)) |
718e3744 | 2394 | { |
5996e0df JT |
2395 | |
2396 | /* Only install LSA if it is originated/refreshed by us. | |
2397 | * If LSA was received by flooding, the RECEIVED flag is set so do | |
2398 | * not link the LSA */ | |
2399 | if (CHECK_FLAG (new->flags, OSPF_LSA_RECEIVED)) | |
2400 | return new; /* ignore stale LSA */ | |
2401 | ||
718e3744 | 2402 | /* Set self-originated router-LSA. */ |
1fe6ed38 | 2403 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 2404 | area->router_lsa_self = ospf_lsa_lock (new); |
2405 | ||
c363d386 | 2406 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2407 | } |
5996e0df | 2408 | if (rt_recalc) |
d3a9c768 | 2409 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_ROUTER_LSA_INSTALL); |
718e3744 | 2410 | return new; |
2411 | } | |
2412 | ||
2413 | #define OSPF_INTERFACE_TIMER_ON(T,F,V) \ | |
2414 | if (!(T)) \ | |
2415 | (T) = thread_add_timer (master, (F), oi, (V)) | |
2416 | ||
2417 | /* Install network-LSA to an area. */ | |
4dadc291 | 2418 | static struct ospf_lsa * |
68980084 | 2419 | ospf_network_lsa_install (struct ospf *ospf, |
2420 | struct ospf_interface *oi, | |
718e3744 | 2421 | struct ospf_lsa *new, |
2422 | int rt_recalc) | |
2423 | { | |
2424 | ||
2425 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2426 | The entire routing table must be recalculated, starting with | |
2427 | the shortest path calculations for each area (not just the | |
2428 | area whose link-state database has changed). | |
2429 | */ | |
5996e0df | 2430 | if (IS_LSA_SELF (new)) |
718e3744 | 2431 | { |
5996e0df JT |
2432 | /* We supposed that when LSA is originated by us, we pass the int |
2433 | for which it was originated. If LSA was received by flooding, | |
2434 | the RECEIVED flag is set, so we do not link the LSA to the int. */ | |
2435 | if (CHECK_FLAG (new->flags, OSPF_LSA_RECEIVED)) | |
2436 | return new; /* ignore stale LSA */ | |
2437 | ||
1fe6ed38 | 2438 | ospf_lsa_unlock (&oi->network_lsa_self); |
718e3744 | 2439 | oi->network_lsa_self = ospf_lsa_lock (new); |
c363d386 | 2440 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2441 | } |
5996e0df | 2442 | if (rt_recalc) |
d3a9c768 | 2443 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_NETWORK_LSA_INSTALL); |
718e3744 | 2444 | |
2445 | return new; | |
2446 | } | |
2447 | ||
2448 | /* Install summary-LSA to an area. */ | |
4dadc291 | 2449 | static struct ospf_lsa * |
68980084 | 2450 | ospf_summary_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2451 | int rt_recalc) | |
718e3744 | 2452 | { |
718e3744 | 2453 | if (rt_recalc && !IS_LSA_SELF (new)) |
2454 | { | |
2455 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2456 | The best route to the destination described by the summary- | |
2457 | LSA must be recalculated (see Section 16.5). If this | |
2458 | destination is an AS boundary router, it may also be | |
2459 | necessary to re-examine all the AS-external-LSAs. | |
2460 | */ | |
2461 | ||
2462 | #if 0 | |
2463 | /* This doesn't exist yet... */ | |
2464 | ospf_summary_incremental_update(new); */ | |
2465 | #else /* #if 0 */ | |
d3a9c768 | 2466 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_SUMMARY_LSA_INSTALL); |
718e3744 | 2467 | #endif /* #if 0 */ |
2468 | ||
718e3744 | 2469 | } |
2470 | ||
2471 | if (IS_LSA_SELF (new)) | |
68980084 | 2472 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2473 | |
2474 | return new; | |
2475 | } | |
2476 | ||
2477 | /* Install ASBR-summary-LSA to an area. */ | |
4dadc291 | 2478 | static struct ospf_lsa * |
68980084 | 2479 | ospf_summary_asbr_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2480 | int rt_recalc) | |
718e3744 | 2481 | { |
2482 | if (rt_recalc && !IS_LSA_SELF (new)) | |
2483 | { | |
2484 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2485 | The best route to the destination described by the summary- | |
2486 | LSA must be recalculated (see Section 16.5). If this | |
2487 | destination is an AS boundary router, it may also be | |
2488 | necessary to re-examine all the AS-external-LSAs. | |
2489 | */ | |
2490 | #if 0 | |
2491 | /* These don't exist yet... */ | |
2492 | ospf_summary_incremental_update(new); | |
2493 | /* Isn't this done by the above call? | |
2494 | - RFC 2328 Section 16.5 implies it should be */ | |
2495 | /* ospf_ase_calculate_schedule(); */ | |
2496 | #else /* #if 0 */ | |
d3a9c768 | 2497 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL); |
718e3744 | 2498 | #endif /* #if 0 */ |
2499 | } | |
2500 | ||
2501 | /* register LSA to refresh-list. */ | |
2502 | if (IS_LSA_SELF (new)) | |
68980084 | 2503 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2504 | |
2505 | return new; | |
2506 | } | |
2507 | ||
2508 | /* Install AS-external-LSA. */ | |
4dadc291 | 2509 | static struct ospf_lsa * |
68980084 | 2510 | ospf_external_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2511 | int rt_recalc) | |
718e3744 | 2512 | { |
68980084 | 2513 | ospf_ase_register_external_lsa (new, ospf); |
718e3744 | 2514 | /* If LSA is not self-originated, calculate an external route. */ |
2515 | if (rt_recalc) | |
2516 | { | |
2517 | /* RFC 2328 Section 13.2 AS-external-LSAs | |
2518 | The best route to the destination described by the AS- | |
2519 | external-LSA must be recalculated (see Section 16.6). | |
2520 | */ | |
2521 | ||
2522 | if (!IS_LSA_SELF (new)) | |
d4a53d58 | 2523 | ospf_ase_incremental_update (ospf, new); |
718e3744 | 2524 | } |
2525 | ||
d4a53d58 | 2526 | if (new->data->type == OSPF_AS_NSSA_LSA) |
2527 | { | |
2528 | /* There is no point to register selforiginate Type-7 LSA for | |
2529 | * refreshing. We rely on refreshing Type-5 LSA's | |
2530 | */ | |
2531 | if (IS_LSA_SELF (new)) | |
2532 | return new; | |
2533 | else | |
2534 | { | |
2535 | /* Try refresh type-5 translated LSA for this LSA, if one exists. | |
2536 | * New translations will be taken care of by the abr_task. | |
2537 | */ | |
2538 | ospf_translated_nssa_refresh (ospf, new, NULL); | |
2539 | } | |
2540 | } | |
d748032f | 2541 | |
d4a53d58 | 2542 | /* Register self-originated LSA to refresh queue. |
8fc0f64b | 2543 | * Leave Translated LSAs alone if NSSA is enabled |
d4a53d58 | 2544 | */ |
beebba75 | 2545 | if (IS_LSA_SELF (new) && !CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT ) ) |
68980084 | 2546 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2547 | |
2548 | return new; | |
2549 | } | |
2550 | ||
2551 | void | |
68980084 | 2552 | ospf_discard_from_db (struct ospf *ospf, |
2553 | struct ospf_lsdb *lsdb, struct ospf_lsa *lsa) | |
718e3744 | 2554 | { |
2555 | struct ospf_lsa *old; | |
2556 | ||
ac904dec PJ |
2557 | if (!lsdb) |
2558 | { | |
2559 | zlog_warn ("%s: Called with NULL lsdb!", __func__); | |
2560 | if (!lsa) | |
2561 | zlog_warn ("%s: and NULL LSA!", __func__); | |
2562 | else | |
2563 | zlog_warn ("LSA[Type%d:%s]: not associated with LSDB!", | |
2564 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
2565 | return; | |
2566 | } | |
2567 | ||
718e3744 | 2568 | old = ospf_lsdb_lookup (lsdb, lsa); |
2569 | ||
2570 | if (!old) | |
2571 | return; | |
2572 | ||
2573 | if (old->refresh_list >= 0) | |
68980084 | 2574 | ospf_refresher_unregister_lsa (ospf, old); |
718e3744 | 2575 | |
2576 | switch (old->data->type) | |
2577 | { | |
2578 | case OSPF_AS_EXTERNAL_LSA: | |
69310a67 | 2579 | ospf_ase_unregister_external_lsa (old, ospf); |
2580 | ospf_ls_retransmit_delete_nbr_as (ospf, old); | |
2581 | break; | |
718e3744 | 2582 | case OSPF_OPAQUE_AS_LSA: |
68980084 | 2583 | ospf_ls_retransmit_delete_nbr_as (ospf, old); |
718e3744 | 2584 | break; |
d748032f | 2585 | case OSPF_AS_NSSA_LSA: |
2586 | ospf_ls_retransmit_delete_nbr_area (old->area, old); | |
2587 | ospf_ase_unregister_external_lsa (old, ospf); | |
beebba75 | 2588 | break; |
718e3744 | 2589 | default: |
68980084 | 2590 | ospf_ls_retransmit_delete_nbr_area (old->area, old); |
718e3744 | 2591 | break; |
2592 | } | |
2593 | ||
68980084 | 2594 | ospf_lsa_maxage_delete (ospf, old); |
718e3744 | 2595 | ospf_lsa_discard (old); |
2596 | } | |
2597 | ||
718e3744 | 2598 | struct ospf_lsa * |
68980084 | 2599 | ospf_lsa_install (struct ospf *ospf, struct ospf_interface *oi, |
2600 | struct ospf_lsa *lsa) | |
718e3744 | 2601 | { |
2602 | struct ospf_lsa *new = NULL; | |
2603 | struct ospf_lsa *old = NULL; | |
2604 | struct ospf_lsdb *lsdb = NULL; | |
2605 | int rt_recalc; | |
2606 | ||
2607 | /* Set LSDB. */ | |
2608 | switch (lsa->data->type) | |
2609 | { | |
f2c80652 | 2610 | /* kevinm */ |
2611 | case OSPF_AS_NSSA_LSA: | |
2612 | if (lsa->area) | |
2613 | lsdb = lsa->area->lsdb; | |
2614 | else | |
68980084 | 2615 | lsdb = ospf->lsdb; |
f2c80652 | 2616 | break; |
718e3744 | 2617 | case OSPF_AS_EXTERNAL_LSA: |
718e3744 | 2618 | case OSPF_OPAQUE_AS_LSA: |
68980084 | 2619 | lsdb = ospf->lsdb; |
718e3744 | 2620 | break; |
2621 | default: | |
2622 | lsdb = lsa->area->lsdb; | |
2623 | break; | |
2624 | } | |
2625 | ||
718e3744 | 2626 | assert (lsdb); |
2627 | ||
2628 | /* RFC 2328 13.2. Installing LSAs in the database | |
2629 | ||
2630 | Installing a new LSA in the database, either as the result of | |
2631 | flooding or a newly self-originated LSA, may cause the OSPF | |
2632 | routing table structure to be recalculated. The contents of the | |
2633 | new LSA should be compared to the old instance, if present. If | |
2634 | there is no difference, there is no need to recalculate the | |
2635 | routing table. When comparing an LSA to its previous instance, | |
2636 | the following are all considered to be differences in contents: | |
2637 | ||
2638 | o The LSA's Options field has changed. | |
2639 | ||
2640 | o One of the LSA instances has LS age set to MaxAge, and | |
2641 | the other does not. | |
2642 | ||
2643 | o The length field in the LSA header has changed. | |
2644 | ||
2645 | o The body of the LSA (i.e., anything outside the 20-byte | |
2646 | LSA header) has changed. Note that this excludes changes | |
2647 | in LS Sequence Number and LS Checksum. | |
2648 | ||
2649 | */ | |
2650 | /* Look up old LSA and determine if any SPF calculation or incremental | |
2651 | update is needed */ | |
2652 | old = ospf_lsdb_lookup (lsdb, lsa); | |
2653 | ||
2654 | /* Do comparision and record if recalc needed. */ | |
2655 | rt_recalc = 0; | |
2656 | if ( old == NULL || ospf_lsa_different(old, lsa)) | |
2657 | rt_recalc = 1; | |
2658 | ||
7ddf1d6e | 2659 | /* |
2660 | Sequence number check (Section 14.1 of rfc 2328) | |
2661 | "Premature aging is used when it is time for a self-originated | |
2662 | LSA's sequence number field to wrap. At this point, the current | |
2663 | LSA instance (having LS sequence number MaxSequenceNumber) must | |
2664 | be prematurely aged and flushed from the routing domain before a | |
2665 | new instance with sequence number equal to InitialSequenceNumber | |
2666 | can be originated. " | |
2667 | */ | |
2668 | ||
c2b478d7 | 2669 | if (ntohl(lsa->data->ls_seqnum) - 1 == OSPF_MAX_SEQUENCE_NUMBER) |
7ddf1d6e | 2670 | { |
2671 | if (ospf_lsa_is_self_originated(ospf, lsa)) | |
2672 | { | |
0c2be26c | 2673 | lsa->data->ls_seqnum = htonl(OSPF_MAX_SEQUENCE_NUMBER); |
2674 | ||
2675 | if (!IS_LSA_MAXAGE(lsa)) | |
7ddf1d6e | 2676 | lsa->flags |= OSPF_LSA_PREMATURE_AGE; |
2677 | lsa->data->ls_age = htons (OSPF_LSA_MAXAGE); | |
2678 | ||
2679 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
2680 | { | |
e588f21f | 2681 | zlog_debug ("ospf_lsa_install() Premature Aging " |
c363d386 | 2682 | "lsa 0x%p, seqnum 0x%x", |
6c4f4e6e | 2683 | (void *)lsa, ntohl(lsa->data->ls_seqnum)); |
7ddf1d6e | 2684 | ospf_lsa_header_dump (lsa->data); |
2685 | } | |
2686 | } | |
2687 | else | |
2688 | { | |
2689 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2690 | { | |
e588f21f | 2691 | zlog_debug ("ospf_lsa_install() got an lsa with seq 0x80000000 " |
7ddf1d6e | 2692 | "that was not self originated. Ignoring\n"); |
2693 | ospf_lsa_header_dump (lsa->data); | |
2694 | } | |
2695 | return old; | |
2696 | } | |
2697 | } | |
2698 | ||
718e3744 | 2699 | /* discard old LSA from LSDB */ |
2700 | if (old != NULL) | |
68980084 | 2701 | ospf_discard_from_db (ospf, lsdb, lsa); |
718e3744 | 2702 | |
718e3744 | 2703 | /* Calculate Checksum if self-originated?. */ |
2704 | if (IS_LSA_SELF (lsa)) | |
2705 | ospf_lsa_checksum (lsa->data); | |
2706 | ||
fe71a97d | 2707 | /* Insert LSA to LSDB. */ |
2708 | ospf_lsdb_add (lsdb, lsa); | |
2709 | lsa->lsdb = lsdb; | |
2710 | ||
718e3744 | 2711 | /* Do LSA specific installation process. */ |
2712 | switch (lsa->data->type) | |
2713 | { | |
2714 | case OSPF_ROUTER_LSA: | |
68980084 | 2715 | new = ospf_router_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2716 | break; |
2717 | case OSPF_NETWORK_LSA: | |
2718 | assert (oi); | |
68980084 | 2719 | new = ospf_network_lsa_install (ospf, oi, lsa, rt_recalc); |
718e3744 | 2720 | break; |
2721 | case OSPF_SUMMARY_LSA: | |
68980084 | 2722 | new = ospf_summary_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2723 | break; |
2724 | case OSPF_ASBR_SUMMARY_LSA: | |
68980084 | 2725 | new = ospf_summary_asbr_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2726 | break; |
2727 | case OSPF_AS_EXTERNAL_LSA: | |
68980084 | 2728 | new = ospf_external_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2729 | break; |
718e3744 | 2730 | case OSPF_OPAQUE_LINK_LSA: |
09e4efdc | 2731 | if (IS_LSA_SELF (lsa)) |
68980084 | 2732 | lsa->oi = oi; /* Specify outgoing ospf-interface for this LSA. */ |
09e4efdc | 2733 | else |
0798cee3 AC |
2734 | { |
2735 | /* Incoming "oi" for this LSA has set at LSUpd reception. */ | |
2736 | } | |
09e4efdc | 2737 | /* Fallthrough */ |
718e3744 | 2738 | case OSPF_OPAQUE_AREA_LSA: |
2739 | case OSPF_OPAQUE_AS_LSA: | |
2740 | new = ospf_opaque_lsa_install (lsa, rt_recalc); | |
2741 | break; | |
d4a53d58 | 2742 | case OSPF_AS_NSSA_LSA: |
68980084 | 2743 | new = ospf_external_lsa_install (ospf, lsa, rt_recalc); |
d4a53d58 | 2744 | default: /* type-6,8,9....nothing special */ |
718e3744 | 2745 | break; |
2746 | } | |
2747 | ||
2748 | if (new == NULL) | |
2749 | return new; /* Installation failed, cannot proceed further -- endo. */ | |
2750 | ||
2751 | /* Debug logs. */ | |
2752 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) | |
2753 | { | |
2754 | char area_str[INET_ADDRSTRLEN]; | |
2755 | ||
2756 | switch (lsa->data->type) | |
2757 | { | |
2758 | case OSPF_AS_EXTERNAL_LSA: | |
718e3744 | 2759 | case OSPF_OPAQUE_AS_LSA: |
beebba75 | 2760 | case OSPF_AS_NSSA_LSA: |
e588f21f | 2761 | zlog_debug ("LSA[%s]: Install %s", |
718e3744 | 2762 | dump_lsa_key (new), |
2763 | LOOKUP (ospf_lsa_type_msg, new->data->type)); | |
2764 | break; | |
2765 | default: | |
2766 | strcpy (area_str, inet_ntoa (new->area->area_id)); | |
e588f21f | 2767 | zlog_debug ("LSA[%s]: Install %s to Area %s", |
718e3744 | 2768 | dump_lsa_key (new), |
2769 | LOOKUP (ospf_lsa_type_msg, new->data->type), area_str); | |
2770 | break; | |
2771 | } | |
2772 | } | |
2773 | ||
7ddf1d6e | 2774 | /* |
2775 | If received LSA' ls_age is MaxAge, or lsa is being prematurely aged | |
2776 | (it's getting flushed out of the area), set LSA on MaxAge LSA list. | |
2777 | */ | |
e0630cb4 | 2778 | if (IS_LSA_MAXAGE (new)) |
718e3744 | 2779 | { |
7ddf1d6e | 2780 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) |
e588f21f | 2781 | zlog_debug ("LSA[Type%d:%s]: Install LSA 0x%p, MaxAge", |
6c4f4e6e DL |
2782 | new->data->type, |
2783 | inet_ntoa (new->data->id), | |
2784 | (void *)lsa); | |
e0630cb4 | 2785 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 2786 | } |
2787 | ||
2788 | return new; | |
2789 | } | |
2790 | ||
6b0655a2 | 2791 | |
4c14b7f6 | 2792 | int |
68980084 | 2793 | ospf_check_nbr_status (struct ospf *ospf) |
718e3744 | 2794 | { |
1eb8ef25 | 2795 | struct listnode *node, *nnode; |
2796 | struct ospf_interface *oi; | |
2797 | ||
2798 | for (ALL_LIST_ELEMENTS (ospf->oiflist, node, nnode, oi)) | |
718e3744 | 2799 | { |
718e3744 | 2800 | struct route_node *rn; |
2801 | struct ospf_neighbor *nbr; | |
2802 | ||
2803 | if (ospf_if_is_enable (oi)) | |
2804 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
2805 | if ((nbr = rn->info) != NULL) | |
2806 | if (nbr->state == NSM_Exchange || nbr->state == NSM_Loading) | |
2807 | { | |
2808 | route_unlock_node (rn); | |
2809 | return 0; | |
2810 | } | |
2811 | } | |
2812 | ||
2813 | return 1; | |
2814 | } | |
2815 | ||
6b0655a2 | 2816 | |
718e3744 | 2817 | |
4dadc291 | 2818 | static int |
718e3744 | 2819 | ospf_maxage_lsa_remover (struct thread *thread) |
2820 | { | |
68980084 | 2821 | struct ospf *ospf = THREAD_ARG (thread); |
1eb8ef25 | 2822 | struct ospf_lsa *lsa; |
91e6a0e5 | 2823 | struct route_node *rn; |
718e3744 | 2824 | int reschedule = 0; |
2825 | ||
68980084 | 2826 | ospf->t_maxage = NULL; |
718e3744 | 2827 | |
2828 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2829 | zlog_debug ("LSA[MaxAge]: remover Start"); |
718e3744 | 2830 | |
68980084 | 2831 | reschedule = !ospf_check_nbr_status (ospf); |
718e3744 | 2832 | |
2833 | if (!reschedule) | |
91e6a0e5 | 2834 | for (rn = route_top(ospf->maxage_lsa); rn; rn = route_next(rn)) |
718e3744 | 2835 | { |
91e6a0e5 DD |
2836 | if ((lsa = rn->info) == NULL) |
2837 | { | |
2838 | continue; | |
2839 | } | |
2840 | ||
4de8bf00 CF |
2841 | /* There is at least one neighbor from which we still await an ack |
2842 | * for that LSA, so we are not allowed to remove it from our lsdb yet | |
2843 | * as per RFC 2328 section 14 para 4 a) */ | |
718e3744 | 2844 | if (lsa->retransmit_counter > 0) |
2845 | { | |
2846 | reschedule = 1; | |
2847 | continue; | |
2848 | } | |
94b6bfd2 PJ |
2849 | |
2850 | /* TODO: maybe convert this function to a work-queue */ | |
2851 | if (thread_should_yield (thread)) | |
4de8bf00 CF |
2852 | { |
2853 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, 0); | |
e387dfd1 | 2854 | route_unlock_node(rn); /* route_top/route_next */ |
4de8bf00 CF |
2855 | return 0; |
2856 | } | |
94b6bfd2 | 2857 | |
718e3744 | 2858 | /* Remove LSA from the LSDB */ |
ce3cdcfb | 2859 | if (IS_LSA_SELF (lsa)) |
718e3744 | 2860 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) |
ad8d4802 | 2861 | zlog_debug ("LSA[Type%d:%s]: LSA 0x%lx is self-originated: ", |
7ddf1d6e | 2862 | lsa->data->type, inet_ntoa (lsa->data->id), (u_long)lsa); |
718e3744 | 2863 | |
2864 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2865 | zlog_debug ("LSA[Type%d:%s]: MaxAge LSA removed from list", |
718e3744 | 2866 | lsa->data->type, inet_ntoa (lsa->data->id)); |
2867 | ||
c363d386 | 2868 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_PREMATURE_AGE)) |
7ddf1d6e | 2869 | { |
2870 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
6c4f4e6e | 2871 | zlog_debug ("originating new lsa for lsa 0x%p\n", (void *)lsa); |
c363d386 | 2872 | ospf_lsa_refresh (ospf, lsa); |
7ddf1d6e | 2873 | } |
2874 | ||
718e3744 | 2875 | /* Remove from lsdb. */ |
ac904dec PJ |
2876 | if (lsa->lsdb) |
2877 | { | |
2878 | ospf_discard_from_db (ospf, lsa->lsdb, lsa); | |
2879 | ospf_lsdb_delete (lsa->lsdb, lsa); | |
2880 | } | |
2881 | else | |
2882 | zlog_warn ("%s: LSA[Type%d:%s]: No associated LSDB!", __func__, | |
2883 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
718e3744 | 2884 | } |
2885 | ||
2886 | /* A MaxAge LSA must be removed immediately from the router's link | |
2887 | state database as soon as both a) it is no longer contained on any | |
2888 | neighbor Link state retransmission lists and b) none of the router's | |
2889 | neighbors are in states Exchange or Loading. */ | |
2890 | if (reschedule) | |
02d942c9 PJ |
2891 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, |
2892 | ospf->maxage_delay); | |
718e3744 | 2893 | |
2894 | return 0; | |
2895 | } | |
2896 | ||
718e3744 | 2897 | void |
68980084 | 2898 | ospf_lsa_maxage_delete (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 2899 | { |
91e6a0e5 | 2900 | struct route_node *rn; |
b4b359a2 | 2901 | struct prefix_ptr lsa_prefix; |
718e3744 | 2902 | |
b4b359a2 PM |
2903 | lsa_prefix.family = 0; |
2904 | lsa_prefix.prefixlen = sizeof(lsa_prefix.prefix) * CHAR_BIT; | |
2905 | lsa_prefix.prefix = (uintptr_t) lsa; | |
91e6a0e5 DD |
2906 | |
2907 | if ((rn = route_node_lookup(ospf->maxage_lsa, | |
2908 | (struct prefix *)&lsa_prefix))) | |
718e3744 | 2909 | { |
91e6a0e5 DD |
2910 | if (rn->info == lsa) |
2911 | { | |
2912 | UNSET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); | |
2913 | ospf_lsa_unlock (&lsa); /* maxage_lsa */ | |
2914 | rn->info = NULL; | |
8afee5c1 | 2915 | route_unlock_node (rn); /* unlock node because lsa is deleted */ |
91e6a0e5 | 2916 | } |
8afee5c1 | 2917 | route_unlock_node (rn); /* route_node_lookup */ |
718e3744 | 2918 | } |
2919 | } | |
2920 | ||
02d942c9 PJ |
2921 | /* Add LSA onto the MaxAge list, and schedule for removal. |
2922 | * This does *not* lead to the LSA being flooded, that must be taken | |
2923 | * care of elsewhere, see, e.g., ospf_lsa_flush* (which are callers of this | |
2924 | * function). | |
2925 | */ | |
718e3744 | 2926 | void |
68980084 | 2927 | ospf_lsa_maxage (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 2928 | { |
b4b359a2 | 2929 | struct prefix_ptr lsa_prefix; |
91e6a0e5 DD |
2930 | struct route_node *rn; |
2931 | ||
718e3744 | 2932 | /* When we saw a MaxAge LSA flooded to us, we put it on the list |
2933 | and schedule the MaxAge LSA remover. */ | |
3106a032 | 2934 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE)) |
718e3744 | 2935 | { |
2936 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2937 | zlog_debug ("LSA[Type%d:%s]: %p already exists on MaxAge LSA list", |
6c4f4e6e | 2938 | lsa->data->type, inet_ntoa (lsa->data->id), (void *)lsa); |
718e3744 | 2939 | return; |
2940 | } | |
2941 | ||
b4b359a2 PM |
2942 | lsa_prefix.family = 0; |
2943 | lsa_prefix.prefixlen = sizeof(lsa_prefix.prefix) * CHAR_BIT; | |
2944 | lsa_prefix.prefix = (uintptr_t) lsa; | |
2945 | ||
91e6a0e5 DD |
2946 | if ((rn = route_node_get (ospf->maxage_lsa, |
2947 | (struct prefix *)&lsa_prefix)) != NULL) | |
2948 | { | |
2949 | if (rn->info != NULL) | |
2950 | { | |
b4b359a2 PM |
2951 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) |
2952 | zlog_debug ("LSA[%s]: found LSA (%p) in table for LSA %p %d", | |
6c4f4e6e DL |
2953 | dump_lsa_key (lsa), rn->info, (void *)lsa, |
2954 | lsa_prefix.prefixlen); | |
91e6a0e5 DD |
2955 | route_unlock_node (rn); |
2956 | } | |
2957 | else | |
2958 | { | |
2959 | rn->info = ospf_lsa_lock(lsa); | |
2960 | SET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); | |
2961 | } | |
2962 | } | |
2963 | else | |
2964 | { | |
2965 | zlog_err("Unable to allocate memory for maxage lsa\n"); | |
2966 | assert(0); | |
2967 | } | |
718e3744 | 2968 | |
2969 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2970 | zlog_debug ("LSA[%s]: MaxAge LSA remover scheduled.", dump_lsa_key (lsa)); |
718e3744 | 2971 | |
02d942c9 PJ |
2972 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, |
2973 | ospf->maxage_delay); | |
718e3744 | 2974 | } |
2975 | ||
4dadc291 | 2976 | static int |
68980084 | 2977 | ospf_lsa_maxage_walker_remover (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 2978 | { |
718e3744 | 2979 | /* Stay away from any Local Translated Type-7 LSAs */ |
2980 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
2981 | return 0; | |
718e3744 | 2982 | |
2983 | if (IS_LSA_MAXAGE (lsa)) | |
2984 | /* Self-originated LSAs should NOT time-out instead, | |
2985 | they're flushed and submitted to the max_age list explicitly. */ | |
68980084 | 2986 | if (!ospf_lsa_is_self_originated (ospf, lsa)) |
718e3744 | 2987 | { |
2988 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2989 | zlog_debug("LSA[%s]: is MaxAge", dump_lsa_key (lsa)); |
718e3744 | 2990 | |
2991 | switch (lsa->data->type) | |
2992 | { | |
37163d6d | 2993 | case OSPF_OPAQUE_LINK_LSA: |
2994 | case OSPF_OPAQUE_AREA_LSA: | |
718e3744 | 2995 | case OSPF_OPAQUE_AS_LSA: |
09e4efdc | 2996 | /* |
2997 | * As a general rule, whenever network topology has changed | |
2998 | * (due to an LSA removal in this case), routing recalculation | |
2999 | * should be triggered. However, this is not true for opaque | |
3000 | * LSAs. Even if an opaque LSA instance is going to be removed | |
3001 | * from the routing domain, it does not mean a change in network | |
3002 | * topology, and thus, routing recalculation is not needed here. | |
3003 | */ | |
3004 | break; | |
09e4efdc | 3005 | case OSPF_AS_EXTERNAL_LSA: |
beebba75 | 3006 | case OSPF_AS_NSSA_LSA: |
68980084 | 3007 | ospf_ase_incremental_update (ospf, lsa); |
3008 | break; | |
718e3744 | 3009 | default: |
d3a9c768 | 3010 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_MAXAGE); |
68980084 | 3011 | break; |
718e3744 | 3012 | } |
68980084 | 3013 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 3014 | } |
3015 | ||
c363d386 PJ |
3016 | if (IS_LSA_MAXAGE (lsa) && !ospf_lsa_is_self_originated (ospf, lsa)) |
3017 | if (LS_AGE (lsa) > OSPF_LSA_MAXAGE + 30) | |
3018 | printf ("Eek! Shouldn't happen!\n"); | |
3019 | ||
718e3744 | 3020 | return 0; |
3021 | } | |
3022 | ||
3023 | /* Periodical check of MaxAge LSA. */ | |
3024 | int | |
68980084 | 3025 | ospf_lsa_maxage_walker (struct thread *thread) |
718e3744 | 3026 | { |
68980084 | 3027 | struct ospf *ospf = THREAD_ARG (thread); |
3028 | struct route_node *rn; | |
3029 | struct ospf_lsa *lsa; | |
1eb8ef25 | 3030 | struct ospf_area *area; |
3031 | struct listnode *node, *nnode; | |
718e3744 | 3032 | |
68980084 | 3033 | ospf->t_maxage_walker = NULL; |
718e3744 | 3034 | |
1eb8ef25 | 3035 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 3036 | { |
68980084 | 3037 | LSDB_LOOP (ROUTER_LSDB (area), rn, lsa) |
3038 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3039 | LSDB_LOOP (NETWORK_LSDB (area), rn, lsa) | |
3040 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3041 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) | |
3042 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3043 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
3044 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
68980084 | 3045 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) |
3046 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3047 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) | |
3048 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
4fb949e3 | 3049 | LSDB_LOOP (NSSA_LSDB (area), rn, lsa) |
3050 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3051 | } |
3052 | ||
4fb949e3 | 3053 | /* for AS-external-LSAs. */ |
68980084 | 3054 | if (ospf->lsdb) |
3055 | { | |
3056 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) | |
3057 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
68980084 | 3058 | LSDB_LOOP (OPAQUE_AS_LSDB (ospf), rn, lsa) |
3059 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
68980084 | 3060 | } |
718e3744 | 3061 | |
68980084 | 3062 | OSPF_TIMER_ON (ospf->t_maxage_walker, ospf_lsa_maxage_walker, |
3063 | OSPF_LSA_MAXAGE_CHECK_INTERVAL); | |
718e3744 | 3064 | return 0; |
3065 | } | |
3066 | ||
68980084 | 3067 | struct ospf_lsa * |
3068 | ospf_lsa_lookup_by_prefix (struct ospf_lsdb *lsdb, u_char type, | |
3069 | struct prefix_ipv4 *p, struct in_addr router_id) | |
718e3744 | 3070 | { |
68980084 | 3071 | struct ospf_lsa *lsa; |
3072 | struct in_addr mask, id; | |
3073 | struct lsa_header_mask | |
3074 | { | |
3075 | struct lsa_header header; | |
3076 | struct in_addr mask; | |
3077 | } *hmask; | |
718e3744 | 3078 | |
68980084 | 3079 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, p->prefix, router_id); |
3080 | if (lsa == NULL) | |
3081 | return NULL; | |
718e3744 | 3082 | |
68980084 | 3083 | masklen2ip (p->prefixlen, &mask); |
718e3744 | 3084 | |
68980084 | 3085 | hmask = (struct lsa_header_mask *) lsa->data; |
718e3744 | 3086 | |
68980084 | 3087 | if (mask.s_addr != hmask->mask.s_addr) |
3088 | { | |
3089 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
3090 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, id, router_id); | |
3091 | if (!lsa) | |
3092 | return NULL; | |
3093 | } | |
718e3744 | 3094 | |
68980084 | 3095 | return lsa; |
718e3744 | 3096 | } |
3097 | ||
3098 | struct ospf_lsa * | |
3099 | ospf_lsa_lookup (struct ospf_area *area, u_int32_t type, | |
3100 | struct in_addr id, struct in_addr adv_router) | |
3101 | { | |
e05fba43 | 3102 | struct ospf *ospf = ospf_lookup(); |
3103 | assert(ospf); | |
3104 | ||
718e3744 | 3105 | switch (type) |
3106 | { | |
3107 | case OSPF_ROUTER_LSA: | |
3108 | case OSPF_NETWORK_LSA: | |
3109 | case OSPF_SUMMARY_LSA: | |
3110 | case OSPF_ASBR_SUMMARY_LSA: | |
718e3744 | 3111 | case OSPF_AS_NSSA_LSA: |
718e3744 | 3112 | case OSPF_OPAQUE_LINK_LSA: |
3113 | case OSPF_OPAQUE_AREA_LSA: | |
718e3744 | 3114 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, adv_router); |
718e3744 | 3115 | case OSPF_AS_EXTERNAL_LSA: |
718e3744 | 3116 | case OSPF_OPAQUE_AS_LSA: |
e05fba43 | 3117 | return ospf_lsdb_lookup_by_id (ospf->lsdb, type, id, adv_router); |
718e3744 | 3118 | default: |
3119 | break; | |
3120 | } | |
3121 | ||
3122 | return NULL; | |
3123 | } | |
3124 | ||
3125 | struct ospf_lsa * | |
3126 | ospf_lsa_lookup_by_id (struct ospf_area *area, u_int32_t type, | |
3127 | struct in_addr id) | |
3128 | { | |
3129 | struct ospf_lsa *lsa; | |
3130 | struct route_node *rn; | |
3131 | ||
3132 | switch (type) | |
3133 | { | |
3134 | case OSPF_ROUTER_LSA: | |
3135 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, id); | |
718e3744 | 3136 | case OSPF_NETWORK_LSA: |
3137 | for (rn = route_top (NETWORK_LSDB (area)); rn; rn = route_next (rn)) | |
3138 | if ((lsa = rn->info)) | |
3139 | if (IPV4_ADDR_SAME (&lsa->data->id, &id)) | |
3140 | { | |
3141 | route_unlock_node (rn); | |
3142 | return lsa; | |
3143 | } | |
3144 | break; | |
3145 | case OSPF_SUMMARY_LSA: | |
3146 | case OSPF_ASBR_SUMMARY_LSA: | |
3147 | /* Currently not used. */ | |
3148 | assert (1); | |
3149 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, id); | |
718e3744 | 3150 | case OSPF_AS_EXTERNAL_LSA: |
d4a53d58 | 3151 | case OSPF_AS_NSSA_LSA: |
718e3744 | 3152 | case OSPF_OPAQUE_LINK_LSA: |
3153 | case OSPF_OPAQUE_AREA_LSA: | |
3154 | case OSPF_OPAQUE_AS_LSA: | |
3155 | /* Currently not used. */ | |
3156 | break; | |
718e3744 | 3157 | default: |
3158 | break; | |
3159 | } | |
3160 | ||
3161 | return NULL; | |
3162 | } | |
3163 | ||
3164 | struct ospf_lsa * | |
3165 | ospf_lsa_lookup_by_header (struct ospf_area *area, struct lsa_header *lsah) | |
3166 | { | |
3167 | struct ospf_lsa *match; | |
3168 | ||
718e3744 | 3169 | /* |
3170 | * Strictly speaking, the LSA-ID field for Opaque-LSAs (type-9/10/11) | |
3171 | * is redefined to have two subfields; opaque-type and opaque-id. | |
3172 | * However, it is harmless to treat the two sub fields together, as if | |
3173 | * they two were forming a unique LSA-ID. | |
3174 | */ | |
718e3744 | 3175 | |
3176 | match = ospf_lsa_lookup (area, lsah->type, lsah->id, lsah->adv_router); | |
3177 | ||
3178 | if (match == NULL) | |
3179 | if (IS_DEBUG_OSPF (lsa, LSA) == OSPF_DEBUG_LSA) | |
e588f21f | 3180 | zlog_debug ("LSA[Type%d:%s]: Lookup by header, NO MATCH", |
718e3744 | 3181 | lsah->type, inet_ntoa (lsah->id)); |
3182 | ||
3183 | return match; | |
3184 | } | |
3185 | ||
3186 | /* return +n, l1 is more recent. | |
3187 | return -n, l2 is more recent. | |
3188 | return 0, l1 and l2 is identical. */ | |
3189 | int | |
3190 | ospf_lsa_more_recent (struct ospf_lsa *l1, struct ospf_lsa *l2) | |
3191 | { | |
3192 | int r; | |
3193 | int x, y; | |
3194 | ||
3195 | if (l1 == NULL && l2 == NULL) | |
3196 | return 0; | |
3197 | if (l1 == NULL) | |
3198 | return -1; | |
3199 | if (l2 == NULL) | |
3200 | return 1; | |
3201 | ||
3202 | /* compare LS sequence number. */ | |
3203 | x = (int) ntohl (l1->data->ls_seqnum); | |
3204 | y = (int) ntohl (l2->data->ls_seqnum); | |
3205 | if (x > y) | |
3206 | return 1; | |
3207 | if (x < y) | |
3208 | return -1; | |
3209 | ||
3210 | /* compare LS checksum. */ | |
3211 | r = ntohs (l1->data->checksum) - ntohs (l2->data->checksum); | |
3212 | if (r) | |
3213 | return r; | |
3214 | ||
3215 | /* compare LS age. */ | |
3216 | if (IS_LSA_MAXAGE (l1) && !IS_LSA_MAXAGE (l2)) | |
3217 | return 1; | |
3218 | else if (!IS_LSA_MAXAGE (l1) && IS_LSA_MAXAGE (l2)) | |
3219 | return -1; | |
3220 | ||
3221 | /* compare LS age with MaxAgeDiff. */ | |
3222 | if (LS_AGE (l1) - LS_AGE (l2) > OSPF_LSA_MAXAGE_DIFF) | |
3223 | return -1; | |
3224 | else if (LS_AGE (l2) - LS_AGE (l1) > OSPF_LSA_MAXAGE_DIFF) | |
3225 | return 1; | |
3226 | ||
3227 | /* LSAs are identical. */ | |
3228 | return 0; | |
3229 | } | |
3230 | ||
3231 | /* If two LSAs are different, return 1, otherwise return 0. */ | |
3232 | int | |
3233 | ospf_lsa_different (struct ospf_lsa *l1, struct ospf_lsa *l2) | |
3234 | { | |
3235 | char *p1, *p2; | |
3236 | assert (l1); | |
3237 | assert (l2); | |
3238 | assert (l1->data); | |
3239 | assert (l2->data); | |
3240 | ||
3241 | if (l1->data->options != l2->data->options) | |
3242 | return 1; | |
3243 | ||
3244 | if (IS_LSA_MAXAGE (l1) && !IS_LSA_MAXAGE (l2)) | |
3245 | return 1; | |
3246 | ||
3247 | if (IS_LSA_MAXAGE (l2) && !IS_LSA_MAXAGE (l1)) | |
3248 | return 1; | |
3249 | ||
3250 | if (l1->data->length != l2->data->length) | |
3251 | return 1; | |
3252 | ||
3253 | if (l1->data->length == 0) | |
3254 | return 1; | |
3255 | ||
5996e0df JT |
3256 | if (CHECK_FLAG ((l1->flags ^ l2->flags), OSPF_LSA_RECEIVED)) |
3257 | return 1; /* May be a stale LSA in the LSBD */ | |
3258 | ||
d1825830 | 3259 | assert ( ntohs(l1->data->length) > OSPF_LSA_HEADER_SIZE); |
718e3744 | 3260 | |
3261 | p1 = (char *) l1->data; | |
3262 | p2 = (char *) l2->data; | |
3263 | ||
3264 | if (memcmp (p1 + OSPF_LSA_HEADER_SIZE, p2 + OSPF_LSA_HEADER_SIZE, | |
3265 | ntohs( l1->data->length ) - OSPF_LSA_HEADER_SIZE) != 0) | |
3266 | return 1; | |
3267 | ||
3268 | return 0; | |
3269 | } | |
3270 | ||
3271 | #ifdef ORIGINAL_CODING | |
3272 | void | |
3273 | ospf_lsa_flush_self_originated (struct ospf_neighbor *nbr, | |
3274 | struct ospf_lsa *self, | |
3275 | struct ospf_lsa *new) | |
3276 | { | |
3277 | u_int32_t seqnum; | |
3278 | ||
3279 | /* Adjust LS Sequence Number. */ | |
3280 | seqnum = ntohl (new->data->ls_seqnum) + 1; | |
3281 | self->data->ls_seqnum = htonl (seqnum); | |
3282 | ||
3283 | /* Recalculate LSA checksum. */ | |
3284 | ospf_lsa_checksum (self->data); | |
3285 | ||
3286 | /* Reflooding LSA. */ | |
3287 | /* RFC2328 Section 13.3 | |
3288 | On non-broadcast networks, separate Link State Update | |
3289 | packets must be sent, as unicasts, to each adjacent neighbor | |
3290 | (i.e., those in state Exchange or greater). The destination | |
3291 | IP addresses for these packets are the neighbors' IP | |
3292 | addresses. */ | |
3293 | if (nbr->oi->type == OSPF_IFTYPE_NBMA) | |
3294 | { | |
3295 | struct route_node *rn; | |
3296 | struct ospf_neighbor *onbr; | |
3297 | ||
3298 | for (rn = route_top (nbr->oi->nbrs); rn; rn = route_next (rn)) | |
3299 | if ((onbr = rn->info) != NULL) | |
3300 | if (onbr != nbr->oi->nbr_self && onbr->status >= NSM_Exchange) | |
3301 | ospf_ls_upd_send_lsa (onbr, self, OSPF_SEND_PACKET_DIRECT); | |
3302 | } | |
3303 | else | |
3304 | ospf_ls_upd_send_lsa (nbr, self, OSPF_SEND_PACKET_INDIRECT); | |
3305 | ||
3306 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3307 | zlog_debug ("LSA[Type%d:%s]: Flush self-originated LSA", |
718e3744 | 3308 | self->data->type, inet_ntoa (self->data->id)); |
3309 | } | |
3310 | #else /* ORIGINAL_CODING */ | |
2c19a6ec | 3311 | int |
68980084 | 3312 | ospf_lsa_flush_schedule (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3313 | { |
3314 | if (lsa == NULL || !IS_LSA_SELF (lsa)) | |
3315 | return 0; | |
3316 | ||
3317 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 3318 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", lsa->data->type, inet_ntoa (lsa->data->id)); |
718e3744 | 3319 | |
3320 | /* Force given lsa's age to MaxAge. */ | |
3321 | lsa->data->ls_age = htons (OSPF_LSA_MAXAGE); | |
3322 | ||
3323 | switch (lsa->data->type) | |
3324 | { | |
02d942c9 | 3325 | /* Opaque wants to be notified of flushes */ |
718e3744 | 3326 | case OSPF_OPAQUE_LINK_LSA: |
3327 | case OSPF_OPAQUE_AREA_LSA: | |
3328 | case OSPF_OPAQUE_AS_LSA: | |
3329 | ospf_opaque_lsa_refresh (lsa); | |
3330 | break; | |
718e3744 | 3331 | default: |
dfbd5176 | 3332 | ospf_refresher_unregister_lsa (ospf, lsa); |
02d942c9 | 3333 | ospf_lsa_flush (ospf, lsa); |
718e3744 | 3334 | break; |
3335 | } | |
3336 | ||
3337 | return 0; | |
3338 | } | |
3339 | ||
3340 | void | |
68980084 | 3341 | ospf_flush_self_originated_lsas_now (struct ospf *ospf) |
718e3744 | 3342 | { |
1eb8ef25 | 3343 | struct listnode *node, *nnode; |
3344 | struct listnode *node2, *nnode2; | |
718e3744 | 3345 | struct ospf_area *area; |
3346 | struct ospf_interface *oi; | |
3347 | struct ospf_lsa *lsa; | |
68980084 | 3348 | struct route_node *rn; |
718e3744 | 3349 | int need_to_flush_ase = 0; |
3350 | ||
1eb8ef25 | 3351 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 3352 | { |
718e3744 | 3353 | if ((lsa = area->router_lsa_self) != NULL) |
3354 | { | |
3355 | if (IS_DEBUG_OSPF_EVENT) | |
dfbd5176 PJ |
3356 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", |
3357 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
3358 | ||
3359 | ospf_refresher_unregister_lsa (ospf, lsa); | |
718e3744 | 3360 | ospf_lsa_flush_area (lsa, area); |
1fe6ed38 | 3361 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 3362 | area->router_lsa_self = NULL; |
718e3744 | 3363 | } |
3364 | ||
1eb8ef25 | 3365 | for (ALL_LIST_ELEMENTS (area->oiflist, node2, nnode2, oi)) |
718e3744 | 3366 | { |
718e3744 | 3367 | if ((lsa = oi->network_lsa_self) != NULL |
1eb8ef25 | 3368 | && oi->state == ISM_DR |
3369 | && oi->full_nbrs > 0) | |
718e3744 | 3370 | { |
3371 | if (IS_DEBUG_OSPF_EVENT) | |
dfbd5176 PJ |
3372 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", |
3373 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
3374 | ||
3375 | ospf_refresher_unregister_lsa (ospf, oi->network_lsa_self); | |
718e3744 | 3376 | ospf_lsa_flush_area (oi->network_lsa_self, area); |
1fe6ed38 | 3377 | ospf_lsa_unlock (&oi->network_lsa_self); |
718e3744 | 3378 | oi->network_lsa_self = NULL; |
718e3744 | 3379 | } |
3380 | ||
3381 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK | |
3382 | && area->external_routing == OSPF_AREA_DEFAULT) | |
3383 | need_to_flush_ase = 1; | |
3384 | } | |
3385 | ||
68980084 | 3386 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) |
3387 | ospf_lsa_flush_schedule (ospf, lsa); | |
3388 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
3389 | ospf_lsa_flush_schedule (ospf, lsa); | |
68980084 | 3390 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) |
3391 | ospf_lsa_flush_schedule (ospf, lsa); | |
3392 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) | |
3393 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3394 | } |
3395 | ||
3396 | if (need_to_flush_ase) | |
3397 | { | |
68980084 | 3398 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) |
3399 | ospf_lsa_flush_schedule (ospf, lsa); | |
68980084 | 3400 | LSDB_LOOP (OPAQUE_AS_LSDB (ospf), rn, lsa) |
3401 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3402 | } |
3403 | ||
3404 | /* | |
3405 | * Make sure that the MaxAge LSA remover is executed immediately, | |
3406 | * without conflicting to other threads. | |
3407 | */ | |
68980084 | 3408 | if (ospf->t_maxage != NULL) |
718e3744 | 3409 | { |
68980084 | 3410 | OSPF_TIMER_OFF (ospf->t_maxage); |
3411 | thread_execute (master, ospf_maxage_lsa_remover, ospf, 0); | |
718e3744 | 3412 | } |
3413 | ||
3414 | return; | |
3415 | } | |
3416 | #endif /* ORIGINAL_CODING */ | |
3417 | ||
3418 | /* If there is self-originated LSA, then return 1, otherwise return 0. */ | |
3419 | /* An interface-independent version of ospf_lsa_is_self_originated */ | |
3420 | int | |
68980084 | 3421 | ospf_lsa_is_self_originated (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3422 | { |
52dc7ee6 | 3423 | struct listnode *node; |
1eb8ef25 | 3424 | struct ospf_interface *oi; |
718e3744 | 3425 | |
3426 | /* This LSA is already checked. */ | |
3427 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF_CHECKED)) | |
ce3cdcfb | 3428 | return IS_LSA_SELF (lsa); |
718e3744 | 3429 | |
3430 | /* Make sure LSA is self-checked. */ | |
3431 | SET_FLAG (lsa->flags, OSPF_LSA_SELF_CHECKED); | |
3432 | ||
3433 | /* AdvRouter and Router ID is the same. */ | |
68980084 | 3434 | if (IPV4_ADDR_SAME (&lsa->data->adv_router, &ospf->router_id)) |
718e3744 | 3435 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); |
3436 | ||
3437 | /* LSA is router-LSA. */ | |
3438 | else if (lsa->data->type == OSPF_ROUTER_LSA && | |
68980084 | 3439 | IPV4_ADDR_SAME (&lsa->data->id, &ospf->router_id)) |
718e3744 | 3440 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); |
3441 | ||
3442 | /* LSA is network-LSA. Compare Link ID with all interfaces. */ | |
3443 | else if (lsa->data->type == OSPF_NETWORK_LSA) | |
1eb8ef25 | 3444 | for (ALL_LIST_ELEMENTS_RO (ospf->oiflist, node, oi)) |
718e3744 | 3445 | { |
718e3744 | 3446 | /* Ignore virtual link. */ |
3447 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
3448 | if (oi->address->family == AF_INET) | |
3449 | if (IPV4_ADDR_SAME (&lsa->data->id, &oi->address->u.prefix4)) | |
3450 | { | |
3451 | /* to make it easier later */ | |
3452 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); | |
ce3cdcfb | 3453 | return IS_LSA_SELF (lsa); |
718e3744 | 3454 | } |
3455 | } | |
3456 | ||
ce3cdcfb | 3457 | return IS_LSA_SELF (lsa); |
718e3744 | 3458 | } |
3459 | ||
3460 | /* Get unique Link State ID. */ | |
3461 | struct in_addr | |
68980084 | 3462 | ospf_lsa_unique_id (struct ospf *ospf, |
3463 | struct ospf_lsdb *lsdb, u_char type, struct prefix_ipv4 *p) | |
718e3744 | 3464 | { |
3465 | struct ospf_lsa *lsa; | |
3466 | struct in_addr mask, id; | |
3467 | ||
3468 | id = p->prefix; | |
3469 | ||
3470 | /* Check existence of LSA instance. */ | |
68980084 | 3471 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, id, ospf->router_id); |
718e3744 | 3472 | if (lsa) |
3473 | { | |
3474 | struct as_external_lsa *al = (struct as_external_lsa *) lsa->data; | |
3475 | if (ip_masklen (al->mask) == p->prefixlen) | |
3476 | { | |
3477 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3478 | zlog_debug ("ospf_lsa_unique_id(): " |
718e3744 | 3479 | "Can't get Link State ID for %s/%d", |
3480 | inet_ntoa (p->prefix), p->prefixlen); | |
3481 | /* id.s_addr = 0; */ | |
3482 | id.s_addr = 0xffffffff; | |
3483 | return id; | |
3484 | } | |
3485 | /* Masklen differs, then apply wildcard mask to Link State ID. */ | |
3486 | else | |
3487 | { | |
3488 | masklen2ip (p->prefixlen, &mask); | |
3489 | ||
3490 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
68980084 | 3491 | lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, type, |
3492 | id, ospf->router_id); | |
718e3744 | 3493 | if (lsa) |
3494 | { | |
3495 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3496 | zlog_debug ("ospf_lsa_unique_id(): " |
718e3744 | 3497 | "Can't get Link State ID for %s/%d", |
3498 | inet_ntoa (p->prefix), p->prefixlen); | |
3499 | /* id.s_addr = 0; */ | |
3500 | id.s_addr = 0xffffffff; | |
3501 | return id; | |
3502 | } | |
3503 | } | |
3504 | } | |
3505 | ||
3506 | return id; | |
3507 | } | |
3508 | ||
6b0655a2 | 3509 | |
70461d79 PJ |
3510 | #define LSA_ACTION_FLOOD_AREA 1 |
3511 | #define LSA_ACTION_FLUSH_AREA 2 | |
718e3744 | 3512 | |
3513 | struct lsa_action | |
3514 | { | |
3515 | u_char action; | |
3516 | struct ospf_area *area; | |
718e3744 | 3517 | struct ospf_lsa *lsa; |
3518 | }; | |
3519 | ||
4dadc291 | 3520 | static int |
718e3744 | 3521 | ospf_lsa_action (struct thread *t) |
3522 | { | |
3523 | struct lsa_action *data; | |
3524 | ||
3525 | data = THREAD_ARG (t); | |
3526 | ||
3527 | if (IS_DEBUG_OSPF (lsa, LSA) == OSPF_DEBUG_LSA) | |
e588f21f | 3528 | zlog_debug ("LSA[Action]: Performing scheduled LSA action: %d", |
718e3744 | 3529 | data->action); |
3530 | ||
3531 | switch (data->action) | |
3532 | { | |
718e3744 | 3533 | case LSA_ACTION_FLOOD_AREA: |
3534 | ospf_flood_through_area (data->area, NULL, data->lsa); | |
3535 | break; | |
718e3744 | 3536 | case LSA_ACTION_FLUSH_AREA: |
3537 | ospf_lsa_flush_area (data->lsa, data->area); | |
3538 | break; | |
718e3744 | 3539 | } |
3540 | ||
1fe6ed38 | 3541 | ospf_lsa_unlock (&data->lsa); /* Message */ |
718e3744 | 3542 | XFREE (MTYPE_OSPF_MESSAGE, data); |
3543 | return 0; | |
3544 | } | |
3545 | ||
3546 | void | |
3547 | ospf_schedule_lsa_flood_area (struct ospf_area *area, struct ospf_lsa *lsa) | |
3548 | { | |
3549 | struct lsa_action *data; | |
3550 | ||
393deb9b | 3551 | data = XCALLOC (MTYPE_OSPF_MESSAGE, sizeof (struct lsa_action)); |
718e3744 | 3552 | data->action = LSA_ACTION_FLOOD_AREA; |
3553 | data->area = area; | |
1fe6ed38 | 3554 | data->lsa = ospf_lsa_lock (lsa); /* Message / Flood area */ |
718e3744 | 3555 | |
ffa2c898 | 3556 | thread_add_event(master, ospf_lsa_action, data, 0, NULL); |
718e3744 | 3557 | } |
3558 | ||
3559 | void | |
3560 | ospf_schedule_lsa_flush_area (struct ospf_area *area, struct ospf_lsa *lsa) | |
3561 | { | |
3562 | struct lsa_action *data; | |
3563 | ||
393deb9b | 3564 | data = XCALLOC (MTYPE_OSPF_MESSAGE, sizeof (struct lsa_action)); |
718e3744 | 3565 | data->action = LSA_ACTION_FLUSH_AREA; |
3566 | data->area = area; | |
1fe6ed38 | 3567 | data->lsa = ospf_lsa_lock (lsa); /* Message / Flush area */ |
718e3744 | 3568 | |
ffa2c898 | 3569 | thread_add_event(master, ospf_lsa_action, data, 0, NULL); |
718e3744 | 3570 | } |
3571 | ||
6b0655a2 | 3572 | |
718e3744 | 3573 | /* LSA Refreshment functions. */ |
c363d386 | 3574 | struct ospf_lsa * |
68980084 | 3575 | ospf_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3576 | { |
3577 | struct external_info *ei; | |
c363d386 | 3578 | struct ospf_lsa *new = NULL; |
718e3744 | 3579 | assert (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF)); |
ce3cdcfb | 3580 | assert (IS_LSA_SELF (lsa)); |
6634974d | 3581 | assert (lsa->lock > 0); |
718e3744 | 3582 | |
3583 | switch (lsa->data->type) | |
3584 | { | |
3585 | /* Router and Network LSAs are processed differently. */ | |
3586 | case OSPF_ROUTER_LSA: | |
c363d386 PJ |
3587 | new = ospf_router_lsa_refresh (lsa); |
3588 | break; | |
718e3744 | 3589 | case OSPF_NETWORK_LSA: |
c363d386 | 3590 | new = ospf_network_lsa_refresh (lsa); |
718e3744 | 3591 | break; |
3592 | case OSPF_SUMMARY_LSA: | |
c363d386 | 3593 | new = ospf_summary_lsa_refresh (ospf, lsa); |
718e3744 | 3594 | break; |
3595 | case OSPF_ASBR_SUMMARY_LSA: | |
c363d386 | 3596 | new = ospf_summary_asbr_lsa_refresh (ospf, lsa); |
718e3744 | 3597 | break; |
3598 | case OSPF_AS_EXTERNAL_LSA: | |
d4a53d58 | 3599 | /* Translated from NSSA Type-5s are refreshed when |
3600 | * from refresh of Type-7 - do not refresh these directly. | |
3601 | */ | |
3602 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
3603 | break; | |
718e3744 | 3604 | ei = ospf_external_info_check (lsa); |
3605 | if (ei) | |
c363d386 | 3606 | new = ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_FORCE); |
718e3744 | 3607 | else |
d4a53d58 | 3608 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 3609 | break; |
718e3744 | 3610 | case OSPF_OPAQUE_LINK_LSA: |
3611 | case OSPF_OPAQUE_AREA_LSA: | |
3612 | case OSPF_OPAQUE_AS_LSA: | |
c363d386 | 3613 | new = ospf_opaque_lsa_refresh (lsa); |
718e3744 | 3614 | break; |
3615 | default: | |
3616 | break; | |
718e3744 | 3617 | } |
c363d386 | 3618 | return new; |
718e3744 | 3619 | } |
3620 | ||
3621 | void | |
68980084 | 3622 | ospf_refresher_register_lsa (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3623 | { |
3624 | u_int16_t index, current_index; | |
3625 | ||
6634974d | 3626 | assert (lsa->lock > 0); |
ce3cdcfb | 3627 | assert (IS_LSA_SELF (lsa)); |
718e3744 | 3628 | |
3629 | if (lsa->refresh_list < 0) | |
3630 | { | |
3631 | int delay; | |
535c84b1 DW |
3632 | int min_delay = OSPF_LS_REFRESH_TIME - (2 * OSPF_LS_REFRESH_JITTER); |
3633 | int max_delay = OSPF_LS_REFRESH_TIME - OSPF_LS_REFRESH_JITTER; | |
718e3744 | 3634 | |
535c84b1 DW |
3635 | /* We want to refresh the LSA within OSPF_LS_REFRESH_TIME which is |
3636 | * 1800s. Use jitter so that we send the LSA sometime between 1680s | |
3637 | * and 1740s. | |
3638 | */ | |
3639 | delay = (random() % (max_delay - min_delay)) + min_delay; | |
718e3744 | 3640 | |
cf672a86 DL |
3641 | current_index = ospf->lsa_refresh_queue.index + (monotime(NULL) |
3642 | - ospf->lsa_refresher_started)/OSPF_LSA_REFRESHER_GRANULARITY; | |
718e3744 | 3643 | |
3644 | index = (current_index + delay/OSPF_LSA_REFRESHER_GRANULARITY) | |
c363d386 | 3645 | % (OSPF_LSA_REFRESHER_SLOTS); |
718e3744 | 3646 | |
3647 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
535c84b1 DW |
3648 | zlog_debug ("LSA[Refresh:Type%d:%s]: age %d, added to index %d", |
3649 | lsa->data->type, inet_ntoa (lsa->data->id), LS_AGE (lsa), index); | |
3650 | ||
68980084 | 3651 | if (!ospf->lsa_refresh_queue.qs[index]) |
3652 | ospf->lsa_refresh_queue.qs[index] = list_new (); | |
535c84b1 | 3653 | |
1fe6ed38 PJ |
3654 | listnode_add (ospf->lsa_refresh_queue.qs[index], |
3655 | ospf_lsa_lock (lsa)); /* lsa_refresh_queue */ | |
718e3744 | 3656 | lsa->refresh_list = index; |
535c84b1 | 3657 | |
f2c80652 | 3658 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) |
6c4f4e6e DL |
3659 | zlog_debug ("LSA[Refresh:Type%d:%s]: ospf_refresher_register_lsa(): " |
3660 | "setting refresh_list on lsa %p (slod %d)", | |
3661 | lsa->data->type, inet_ntoa (lsa->data->id), (void *)lsa, index); | |
718e3744 | 3662 | } |
3663 | } | |
3664 | ||
3665 | void | |
68980084 | 3666 | ospf_refresher_unregister_lsa (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3667 | { |
6634974d | 3668 | assert (lsa->lock > 0); |
ce3cdcfb | 3669 | assert (IS_LSA_SELF (lsa)); |
718e3744 | 3670 | if (lsa->refresh_list >= 0) |
3671 | { | |
52dc7ee6 | 3672 | struct list *refresh_list = ospf->lsa_refresh_queue.qs[lsa->refresh_list]; |
718e3744 | 3673 | listnode_delete (refresh_list, lsa); |
3674 | if (!listcount (refresh_list)) | |
3675 | { | |
3676 | list_free (refresh_list); | |
68980084 | 3677 | ospf->lsa_refresh_queue.qs[lsa->refresh_list] = NULL; |
718e3744 | 3678 | } |
1fe6ed38 | 3679 | ospf_lsa_unlock (&lsa); /* lsa_refresh_queue */ |
718e3744 | 3680 | lsa->refresh_list = -1; |
3681 | } | |
3682 | } | |
3683 | ||
3684 | int | |
3685 | ospf_lsa_refresh_walker (struct thread *t) | |
3686 | { | |
52dc7ee6 | 3687 | struct list *refresh_list; |
1eb8ef25 | 3688 | struct listnode *node, *nnode; |
68980084 | 3689 | struct ospf *ospf = THREAD_ARG (t); |
1eb8ef25 | 3690 | struct ospf_lsa *lsa; |
718e3744 | 3691 | int i; |
52dc7ee6 | 3692 | struct list *lsa_to_refresh = list_new (); |
718e3744 | 3693 | |
3694 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
535c84b1 | 3695 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): start"); |
718e3744 | 3696 | |
3697 | ||
68980084 | 3698 | i = ospf->lsa_refresh_queue.index; |
718e3744 | 3699 | |
9dbc7972 | 3700 | /* Note: if clock has jumped backwards, then time change could be negative, |
3701 | so we are careful to cast the expression to unsigned before taking | |
3702 | modulus. */ | |
68980084 | 3703 | ospf->lsa_refresh_queue.index = |
9dbc7972 | 3704 | ((unsigned long)(ospf->lsa_refresh_queue.index + |
cf672a86 | 3705 | (monotime(NULL) - ospf->lsa_refresher_started) |
c363d386 PJ |
3706 | / OSPF_LSA_REFRESHER_GRANULARITY)) |
3707 | % OSPF_LSA_REFRESHER_SLOTS; | |
718e3744 | 3708 | |
3709 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3710 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): next index %d", |
68980084 | 3711 | ospf->lsa_refresh_queue.index); |
718e3744 | 3712 | |
68980084 | 3713 | for (;i != ospf->lsa_refresh_queue.index; |
718e3744 | 3714 | i = (i + 1) % OSPF_LSA_REFRESHER_SLOTS) |
3715 | { | |
3716 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3717 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): " |
d4a53d58 | 3718 | "refresh index %d", i); |
718e3744 | 3719 | |
68980084 | 3720 | refresh_list = ospf->lsa_refresh_queue.qs [i]; |
718e3744 | 3721 | |
6634974d PJ |
3722 | assert (i >= 0); |
3723 | ||
68980084 | 3724 | ospf->lsa_refresh_queue.qs [i] = NULL; |
3725 | ||
718e3744 | 3726 | if (refresh_list) |
3727 | { | |
1eb8ef25 | 3728 | for (ALL_LIST_ELEMENTS (refresh_list, node, nnode, lsa)) |
718e3744 | 3729 | { |
718e3744 | 3730 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) |
535c84b1 | 3731 | zlog_debug ("LSA[Refresh:Type%d:%s]: ospf_lsa_refresh_walker(): " |
6c4f4e6e DL |
3732 | "refresh lsa %p (slot %d)", |
3733 | lsa->data->type, inet_ntoa (lsa->data->id), (void *)lsa, i); | |
3734 | ||
6634974d | 3735 | assert (lsa->lock > 0); |
718e3744 | 3736 | list_delete_node (refresh_list, node); |
718e3744 | 3737 | lsa->refresh_list = -1; |
3738 | listnode_add (lsa_to_refresh, lsa); | |
718e3744 | 3739 | } |
3740 | list_free (refresh_list); | |
3741 | } | |
3742 | } | |
3743 | ||
ffa2c898 QY |
3744 | ospf->t_lsa_refresher = thread_add_timer(master, ospf_lsa_refresh_walker, |
3745 | ospf, ospf->lsa_refresh_interval, | |
3746 | NULL); | |
cf672a86 | 3747 | ospf->lsa_refresher_started = monotime(NULL); |
718e3744 | 3748 | |
1eb8ef25 | 3749 | for (ALL_LIST_ELEMENTS (lsa_to_refresh, node, nnode, lsa)) |
6634974d PJ |
3750 | { |
3751 | ospf_lsa_refresh (ospf, lsa); | |
3752 | assert (lsa->lock > 0); | |
3753 | ospf_lsa_unlock (&lsa); /* lsa_refresh_queue & temp for lsa_to_refresh*/ | |
3754 | } | |
718e3744 | 3755 | |
3756 | list_delete (lsa_to_refresh); | |
3757 | ||
3758 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3759 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): end"); |
718e3744 | 3760 | |
3761 | return 0; | |
3762 | } | |
3763 |