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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 | * | |
896014f4 DL |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
cbf3e3eb | 24 | #include "monotime.h" |
718e3744 | 25 | #include "linklist.h" |
26 | #include "prefix.h" | |
27 | #include "if.h" | |
28 | #include "table.h" | |
29 | #include "memory.h" | |
30 | #include "stream.h" | |
31 | #include "log.h" | |
32 | #include "thread.h" | |
33 | #include "hash.h" | |
34 | #include "sockunion.h" /* for inet_aton() */ | |
6a270cd9 | 35 | #include "checksum.h" |
718e3744 | 36 | |
37 | #include "ospfd/ospfd.h" | |
38 | #include "ospfd/ospf_interface.h" | |
39 | #include "ospfd/ospf_ism.h" | |
40 | #include "ospfd/ospf_asbr.h" | |
41 | #include "ospfd/ospf_lsa.h" | |
42 | #include "ospfd/ospf_lsdb.h" | |
43 | #include "ospfd/ospf_neighbor.h" | |
44 | #include "ospfd/ospf_nsm.h" | |
45 | #include "ospfd/ospf_flood.h" | |
46 | #include "ospfd/ospf_packet.h" | |
47 | #include "ospfd/ospf_spf.h" | |
48 | #include "ospfd/ospf_dump.h" | |
49 | #include "ospfd/ospf_route.h" | |
50 | #include "ospfd/ospf_ase.h" | |
51 | #include "ospfd/ospf_zebra.h" | |
52 | ||
6b0655a2 | 53 | |
718e3744 | 54 | u_int32_t |
55 | get_metric (u_char *metric) | |
56 | { | |
57 | u_int32_t m; | |
58 | m = metric[0]; | |
59 | m = (m << 8) + metric[1]; | |
60 | m = (m << 8) + metric[2]; | |
61 | return m; | |
62 | } | |
63 | ||
6b0655a2 | 64 | |
b6927875 | 65 | struct timeval |
16e56a14 | 66 | int2tv (int a) |
b6927875 DS |
67 | { |
68 | struct timeval ret; | |
69 | ||
16e56a14 MR |
70 | ret.tv_sec = a; |
71 | ret.tv_usec = 0; | |
b6927875 DS |
72 | |
73 | return ret; | |
74 | } | |
75 | ||
718e3744 | 76 | struct timeval |
16e56a14 | 77 | msec2tv (int a) |
718e3744 | 78 | { |
79 | struct timeval ret; | |
80 | ||
16e56a14 MR |
81 | ret.tv_sec = a/1000; |
82 | ret.tv_usec = (a%1000) * 1000; | |
718e3744 | 83 | |
cbf3e3eb | 84 | return ret; |
718e3744 | 85 | } |
86 | ||
87 | int | |
88 | ospf_lsa_refresh_delay (struct ospf_lsa *lsa) | |
89 | { | |
cbf3e3eb | 90 | struct timeval delta; |
718e3744 | 91 | int delay = 0; |
92 | ||
cbf3e3eb | 93 | if (monotime_since (&lsa->tv_orig, &delta) < OSPF_MIN_LS_INTERVAL * 1000LL) |
718e3744 | 94 | { |
cbf3e3eb DL |
95 | struct timeval minv = msec2tv (OSPF_MIN_LS_INTERVAL); |
96 | timersub (&minv, &delta, &minv); | |
97 | ||
98 | /* TBD: remove padding to full sec, return timeval instead */ | |
99 | delay = minv.tv_sec + !!minv.tv_usec; | |
718e3744 | 100 | |
101 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 102 | zlog_debug ("LSA[Type%d:%s]: Refresh timer delay %d seconds", |
718e3744 | 103 | lsa->data->type, inet_ntoa (lsa->data->id), delay); |
104 | ||
105 | assert (delay > 0); | |
106 | } | |
107 | ||
108 | return delay; | |
109 | } | |
110 | ||
6b0655a2 | 111 | |
718e3744 | 112 | int |
113 | get_age (struct ospf_lsa *lsa) | |
114 | { | |
cbf3e3eb | 115 | struct timeval rel; |
718e3744 | 116 | |
cbf3e3eb DL |
117 | monotime_since (&lsa->tv_recv, &rel); |
118 | return ntohs (lsa->data->ls_age) + rel.tv_sec; | |
718e3744 | 119 | } |
120 | ||
6b0655a2 | 121 | |
718e3744 | 122 | /* Fletcher Checksum -- Refer to RFC1008. */ |
718e3744 | 123 | |
6a270cd9 JD |
124 | /* All the offsets are zero-based. The offsets in the RFC1008 are |
125 | one-based. */ | |
718e3744 | 126 | u_int16_t |
127 | ospf_lsa_checksum (struct lsa_header *lsa) | |
128 | { | |
6a270cd9 JD |
129 | u_char *buffer = (u_char *) &lsa->options; |
130 | int options_offset = buffer - (u_char *) &lsa->ls_age; /* should be 2 */ | |
718e3744 | 131 | |
6a270cd9 JD |
132 | /* Skip the AGE field */ |
133 | u_int16_t len = ntohs(lsa->length) - options_offset; | |
718e3744 | 134 | |
6a270cd9 JD |
135 | /* Checksum offset starts from "options" field, not the beginning of the |
136 | lsa_header struct. The offset is 14, rather than 16. */ | |
137 | int checksum_offset = (u_char *) &lsa->checksum - buffer; | |
718e3744 | 138 | |
6a270cd9 | 139 | return fletcher_checksum(buffer, len, checksum_offset); |
718e3744 | 140 | } |
141 | ||
d8a4e42b JR |
142 | int |
143 | ospf_lsa_checksum_valid (struct lsa_header *lsa) | |
144 | { | |
145 | u_char *buffer = (u_char *) &lsa->options; | |
146 | int options_offset = buffer - (u_char *) &lsa->ls_age; /* should be 2 */ | |
147 | ||
148 | /* Skip the AGE field */ | |
149 | u_int16_t len = ntohs(lsa->length) - options_offset; | |
150 | ||
151 | return(fletcher_checksum(buffer, len, FLETCHER_CHECKSUM_VALIDATE) == 0); | |
152 | } | |
153 | ||
718e3744 | 154 | |
6b0655a2 | 155 | |
718e3744 | 156 | /* Create OSPF LSA. */ |
157 | struct ospf_lsa * | |
158 | ospf_lsa_new () | |
159 | { | |
160 | struct ospf_lsa *new; | |
161 | ||
162 | new = XCALLOC (MTYPE_OSPF_LSA, sizeof (struct ospf_lsa)); | |
718e3744 | 163 | |
164 | new->flags = 0; | |
165 | new->lock = 1; | |
166 | new->retransmit_counter = 0; | |
6ced0e7f | 167 | monotime(&new->tv_recv); |
718e3744 | 168 | new->tv_orig = new->tv_recv; |
169 | new->refresh_list = -1; | |
170 | ||
171 | return new; | |
172 | } | |
173 | ||
174 | /* Duplicate OSPF LSA. */ | |
175 | struct ospf_lsa * | |
176 | ospf_lsa_dup (struct ospf_lsa *lsa) | |
177 | { | |
178 | struct ospf_lsa *new; | |
179 | ||
180 | if (lsa == NULL) | |
181 | return NULL; | |
182 | ||
183 | new = XCALLOC (MTYPE_OSPF_LSA, sizeof (struct ospf_lsa)); | |
184 | ||
185 | memcpy (new, lsa, sizeof (struct ospf_lsa)); | |
186 | UNSET_FLAG (new->flags, OSPF_LSA_DISCARD); | |
187 | new->lock = 1; | |
188 | new->retransmit_counter = 0; | |
189 | new->data = ospf_lsa_data_dup (lsa->data); | |
190 | ||
f2c80652 | 191 | /* kevinm: Clear the refresh_list, otherwise there are going |
192 | to be problems when we try to remove the LSA from the | |
193 | queue (which it's not a member of.) | |
194 | XXX: Should we add the LSA to the refresh_list queue? */ | |
195 | new->refresh_list = -1; | |
196 | ||
197 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
6c4f4e6e | 198 | zlog_debug ("LSA: duplicated %p (new: %p)", (void *)lsa, (void *)new); |
f2c80652 | 199 | |
718e3744 | 200 | return new; |
201 | } | |
202 | ||
203 | /* Free OSPF LSA. */ | |
204 | void | |
205 | ospf_lsa_free (struct ospf_lsa *lsa) | |
206 | { | |
207 | assert (lsa->lock == 0); | |
208 | ||
209 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
6c4f4e6e | 210 | zlog_debug ("LSA: freed %p", (void *)lsa); |
718e3744 | 211 | |
212 | /* Delete LSA data. */ | |
213 | if (lsa->data != NULL) | |
214 | ospf_lsa_data_free (lsa->data); | |
215 | ||
216 | assert (lsa->refresh_list < 0); | |
217 | ||
218 | memset (lsa, 0, sizeof (struct ospf_lsa)); | |
219 | XFREE (MTYPE_OSPF_LSA, lsa); | |
220 | } | |
221 | ||
222 | /* Lock LSA. */ | |
223 | struct ospf_lsa * | |
224 | ospf_lsa_lock (struct ospf_lsa *lsa) | |
225 | { | |
226 | lsa->lock++; | |
227 | return lsa; | |
228 | } | |
229 | ||
230 | /* Unlock LSA. */ | |
231 | void | |
1fe6ed38 | 232 | ospf_lsa_unlock (struct ospf_lsa **lsa) |
718e3744 | 233 | { |
234 | /* This is sanity check. */ | |
1fe6ed38 | 235 | if (!lsa || !*lsa) |
718e3744 | 236 | return; |
237 | ||
1fe6ed38 | 238 | (*lsa)->lock--; |
718e3744 | 239 | |
1fe6ed38 | 240 | assert ((*lsa)->lock >= 0); |
718e3744 | 241 | |
1fe6ed38 | 242 | if ((*lsa)->lock == 0) |
718e3744 | 243 | { |
1fe6ed38 PJ |
244 | assert (CHECK_FLAG ((*lsa)->flags, OSPF_LSA_DISCARD)); |
245 | ospf_lsa_free (*lsa); | |
246 | *lsa = NULL; | |
718e3744 | 247 | } |
248 | } | |
249 | ||
250 | /* Check discard flag. */ | |
251 | void | |
252 | ospf_lsa_discard (struct ospf_lsa *lsa) | |
253 | { | |
254 | if (!CHECK_FLAG (lsa->flags, OSPF_LSA_DISCARD)) | |
255 | { | |
256 | SET_FLAG (lsa->flags, OSPF_LSA_DISCARD); | |
1fe6ed38 | 257 | ospf_lsa_unlock (&lsa); |
718e3744 | 258 | } |
259 | } | |
260 | ||
261 | /* Create LSA data. */ | |
262 | struct lsa_header * | |
263 | ospf_lsa_data_new (size_t size) | |
264 | { | |
393deb9b | 265 | return XCALLOC (MTYPE_OSPF_LSA_DATA, size); |
718e3744 | 266 | } |
267 | ||
268 | /* Duplicate LSA data. */ | |
269 | struct lsa_header * | |
270 | ospf_lsa_data_dup (struct lsa_header *lsah) | |
271 | { | |
272 | struct lsa_header *new; | |
273 | ||
274 | new = ospf_lsa_data_new (ntohs (lsah->length)); | |
275 | memcpy (new, lsah, ntohs (lsah->length)); | |
276 | ||
277 | return new; | |
278 | } | |
279 | ||
280 | /* Free LSA data. */ | |
281 | void | |
282 | ospf_lsa_data_free (struct lsa_header *lsah) | |
283 | { | |
284 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 285 | zlog_debug ("LSA[Type%d:%s]: data freed %p", |
6c4f4e6e | 286 | lsah->type, inet_ntoa (lsah->id), (void *)lsah); |
718e3744 | 287 | |
288 | XFREE (MTYPE_OSPF_LSA_DATA, lsah); | |
289 | } | |
290 | ||
6b0655a2 | 291 | |
718e3744 | 292 | /* LSA general functions. */ |
293 | ||
294 | const char * | |
295 | dump_lsa_key (struct ospf_lsa *lsa) | |
296 | { | |
297 | static char buf[] = { | |
52dc7ee6 | 298 | "Type255,id(255.255.255.255),ar(255.255.255.255)" |
718e3744 | 299 | }; |
300 | struct lsa_header *lsah; | |
301 | ||
302 | if (lsa != NULL && (lsah = lsa->data) != NULL) | |
303 | { | |
304 | char id[INET_ADDRSTRLEN], ar[INET_ADDRSTRLEN]; | |
305 | strcpy (id, inet_ntoa (lsah->id)); | |
306 | strcpy (ar, inet_ntoa (lsah->adv_router)); | |
307 | ||
308 | sprintf (buf, "Type%d,id(%s),ar(%s)", lsah->type, id, ar); | |
309 | } | |
310 | else | |
311 | strcpy (buf, "NULL"); | |
312 | ||
313 | return buf; | |
314 | } | |
315 | ||
316 | u_int32_t | |
317 | lsa_seqnum_increment (struct ospf_lsa *lsa) | |
318 | { | |
319 | u_int32_t seqnum; | |
320 | ||
321 | seqnum = ntohl (lsa->data->ls_seqnum) + 1; | |
322 | ||
323 | return htonl (seqnum); | |
324 | } | |
325 | ||
326 | void | |
327 | lsa_header_set (struct stream *s, u_char options, | |
68980084 | 328 | u_char type, struct in_addr id, struct in_addr router_id) |
718e3744 | 329 | { |
330 | struct lsa_header *lsah; | |
331 | ||
332 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
333 | ||
02d942c9 | 334 | lsah->ls_age = htons (OSPF_LSA_INITIAL_AGE); |
718e3744 | 335 | lsah->options = options; |
336 | lsah->type = type; | |
337 | lsah->id = id; | |
68980084 | 338 | lsah->adv_router = router_id; |
718e3744 | 339 | lsah->ls_seqnum = htonl (OSPF_INITIAL_SEQUENCE_NUMBER); |
340 | ||
9985f83c | 341 | stream_forward_endp (s, OSPF_LSA_HEADER_SIZE); |
718e3744 | 342 | } |
6b0655a2 | 343 | |
68980084 | 344 | |
718e3744 | 345 | /* router-LSA related functions. */ |
346 | /* Get router-LSA flags. */ | |
4dadc291 | 347 | static u_char |
718e3744 | 348 | router_lsa_flags (struct ospf_area *area) |
349 | { | |
350 | u_char flags; | |
351 | ||
68980084 | 352 | flags = area->ospf->flags; |
718e3744 | 353 | |
354 | /* Set virtual link flag. */ | |
355 | if (ospf_full_virtual_nbrs (area)) | |
356 | SET_FLAG (flags, ROUTER_LSA_VIRTUAL); | |
357 | else | |
358 | /* Just sanity check */ | |
359 | UNSET_FLAG (flags, ROUTER_LSA_VIRTUAL); | |
360 | ||
361 | /* Set Shortcut ABR behabiour flag. */ | |
362 | UNSET_FLAG (flags, ROUTER_LSA_SHORTCUT); | |
68980084 | 363 | if (area->ospf->abr_type == OSPF_ABR_SHORTCUT) |
718e3744 | 364 | if (!OSPF_IS_AREA_BACKBONE (area)) |
365 | if ((area->shortcut_configured == OSPF_SHORTCUT_DEFAULT && | |
68980084 | 366 | area->ospf->backbone == NULL) || |
718e3744 | 367 | area->shortcut_configured == OSPF_SHORTCUT_ENABLE) |
368 | SET_FLAG (flags, ROUTER_LSA_SHORTCUT); | |
369 | ||
370 | /* ASBR can't exit in stub area. */ | |
fc787e87 | 371 | if (area->external_routing == OSPF_AREA_STUB) |
942b6c19 | 372 | UNSET_FLAG (flags, ROUTER_LSA_EXTERNAL); |
373 | /* If ASBR set External flag */ | |
374 | else if (IS_OSPF_ASBR (area->ospf)) | |
375 | SET_FLAG (flags, ROUTER_LSA_EXTERNAL); | |
376 | ||
377 | /* Set ABR dependent flags */ | |
378 | if (IS_OSPF_ABR (area->ospf)) | |
379 | { | |
380 | SET_FLAG (flags, ROUTER_LSA_BORDER); | |
942b6c19 | 381 | /* If Area is NSSA and we are both ABR and unconditional translator, |
d4a53d58 | 382 | * set Nt bit to inform other routers. |
942b6c19 | 383 | */ |
d4a53d58 | 384 | if ( (area->external_routing == OSPF_AREA_NSSA) |
385 | && (area->NSSATranslatorRole == OSPF_NSSA_ROLE_ALWAYS)) | |
386 | SET_FLAG (flags, ROUTER_LSA_NT); | |
942b6c19 | 387 | } |
718e3744 | 388 | return flags; |
389 | } | |
390 | ||
391 | /* Lookup neighbor other than myself. | |
392 | And check neighbor count, | |
393 | Point-to-Point link must have only 1 neighbor. */ | |
394 | struct ospf_neighbor * | |
68980084 | 395 | ospf_nbr_lookup_ptop (struct ospf_interface *oi) |
718e3744 | 396 | { |
718e3744 | 397 | struct ospf_neighbor *nbr = NULL; |
68980084 | 398 | struct route_node *rn; |
718e3744 | 399 | |
400 | /* Search neighbor, there must be one of two nbrs. */ | |
68980084 | 401 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) |
402 | if ((nbr = rn->info)) | |
403 | if (!IPV4_ADDR_SAME (&nbr->router_id, &oi->ospf->router_id)) | |
718e3744 | 404 | if (nbr->state == NSM_Full) |
68980084 | 405 | { |
406 | route_unlock_node (rn); | |
407 | break; | |
408 | } | |
718e3744 | 409 | |
410 | /* PtoP link must have only 1 neighbor. */ | |
68980084 | 411 | if (ospf_nbr_count (oi, 0) > 1) |
718e3744 | 412 | zlog_warn ("Point-to-Point link has more than 1 neighobrs."); |
413 | ||
414 | return nbr; | |
415 | } | |
416 | ||
88d6cf37 | 417 | /* Determine cost of link, taking RFC3137 stub-router support into |
418 | * consideration | |
419 | */ | |
420 | static u_int16_t | |
421 | ospf_link_cost (struct ospf_interface *oi) | |
422 | { | |
423 | /* RFC3137 stub router support */ | |
424 | if (!CHECK_FLAG (oi->area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED)) | |
425 | return oi->output_cost; | |
426 | else | |
427 | return OSPF_OUTPUT_COST_INFINITE; | |
428 | } | |
429 | ||
718e3744 | 430 | /* Set a link information. */ |
779adb01 | 431 | static char |
718e3744 | 432 | link_info_set (struct stream *s, struct in_addr id, |
433 | struct in_addr data, u_char type, u_char tos, u_int16_t cost) | |
434 | { | |
779adb01 | 435 | /* LSA stream is initially allocated to OSPF_MAX_LSA_SIZE, suits |
436 | * vast majority of cases. Some rare routers with lots of links need more. | |
437 | * we try accomodate those here. | |
438 | */ | |
439 | if (STREAM_WRITEABLE(s) < OSPF_ROUTER_LSA_LINK_SIZE) | |
440 | { | |
441 | size_t ret = OSPF_MAX_LSA_SIZE; | |
442 | ||
443 | /* Can we enlarge the stream still? */ | |
444 | if (STREAM_SIZE(s) == OSPF_MAX_LSA_SIZE) | |
445 | { | |
446 | /* we futz the size here for simplicity, really we need to account | |
447 | * for just: | |
448 | * IP Header - (sizeof (struct ip)) | |
449 | * OSPF Header - OSPF_HEADER_SIZE | |
450 | * LSA Header - OSPF_LSA_HEADER_SIZE | |
451 | * MD5 auth data, if MD5 is configured - OSPF_AUTH_MD5_SIZE. | |
452 | * | |
453 | * Simpler just to subtract OSPF_MAX_LSA_SIZE though. | |
454 | */ | |
455 | ret = stream_resize (s, OSPF_MAX_PACKET_SIZE - OSPF_MAX_LSA_SIZE); | |
456 | } | |
457 | ||
458 | if (ret == OSPF_MAX_LSA_SIZE) | |
459 | { | |
5372510d | 460 | zlog_warn ("%s: Out of space in LSA stream, left %zd, size %zd", |
779adb01 | 461 | __func__, STREAM_REMAIN (s), STREAM_SIZE (s)); |
462 | return 0; | |
463 | } | |
464 | } | |
465 | ||
718e3744 | 466 | /* TOS based routing is not supported. */ |
467 | stream_put_ipv4 (s, id.s_addr); /* Link ID. */ | |
468 | stream_put_ipv4 (s, data.s_addr); /* Link Data. */ | |
469 | stream_putc (s, type); /* Link Type. */ | |
470 | stream_putc (s, tos); /* TOS = 0. */ | |
471 | stream_putw (s, cost); /* Link Cost. */ | |
779adb01 | 472 | |
473 | return 1; | |
718e3744 | 474 | } |
475 | ||
e4529636 | 476 | /* Describe Point-to-Point link (Section 12.4.1.1). */ |
4dadc291 | 477 | static int |
718e3744 | 478 | lsa_link_ptop_set (struct stream *s, struct ospf_interface *oi) |
479 | { | |
480 | int links = 0; | |
481 | struct ospf_neighbor *nbr; | |
525c1839 | 482 | struct in_addr id, mask, data; |
88d6cf37 | 483 | u_int16_t cost = ospf_link_cost (oi); |
718e3744 | 484 | |
485 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 486 | zlog_debug ("LSA[Type1]: Set link Point-to-Point"); |
718e3744 | 487 | |
68980084 | 488 | if ((nbr = ospf_nbr_lookup_ptop (oi))) |
718e3744 | 489 | if (nbr->state == NSM_Full) |
490 | { | |
525c1839 DS |
491 | if (CHECK_FLAG(oi->connected->flags, ZEBRA_IFA_UNNUMBERED)) |
492 | { | |
493 | /* For unnumbered point-to-point networks, the Link Data field | |
494 | should specify the interface's MIB-II ifIndex value. */ | |
495 | data.s_addr = htonl(oi->ifp->ifindex); | |
496 | links += link_info_set (s, nbr->router_id, data, | |
497 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
498 | } | |
499 | else | |
500 | { | |
501 | links += link_info_set (s, nbr->router_id, | |
502 | oi->address->u.prefix4, | |
503 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
504 | } | |
718e3744 | 505 | } |
506 | ||
525c1839 DS |
507 | /* no need for a stub link for unnumbered interfaces */ |
508 | if (!CHECK_FLAG(oi->connected->flags, ZEBRA_IFA_UNNUMBERED)) | |
509 | { | |
510 | /* Regardless of the state of the neighboring router, we must | |
511 | add a Type 3 link (stub network). | |
512 | N.B. Options 1 & 2 share basically the same logic. */ | |
513 | masklen2ip (oi->address->prefixlen, &mask); | |
514 | id.s_addr = CONNECTED_PREFIX(oi->connected)->u.prefix4.s_addr & mask.s_addr; | |
515 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, | |
516 | oi->output_cost); | |
517 | } | |
518 | ||
718e3744 | 519 | return links; |
520 | } | |
521 | ||
522 | /* Describe Broadcast Link. */ | |
4dadc291 | 523 | static int |
718e3744 | 524 | lsa_link_broadcast_set (struct stream *s, struct ospf_interface *oi) |
525 | { | |
526 | struct ospf_neighbor *dr; | |
527 | struct in_addr id, mask; | |
88d6cf37 | 528 | u_int16_t cost = ospf_link_cost (oi); |
529 | ||
718e3744 | 530 | /* Describe Type 3 Link. */ |
531 | if (oi->state == ISM_Waiting) | |
532 | { | |
cbf435cb CF |
533 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
534 | zlog_debug ("LSA[Type1]: Interface %s is in state Waiting. " | |
535 | "Adding stub interface", oi->ifp->name); | |
718e3744 | 536 | masklen2ip (oi->address->prefixlen, &mask); |
537 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 538 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
539 | oi->output_cost); | |
718e3744 | 540 | } |
541 | ||
542 | dr = ospf_nbr_lookup_by_addr (oi->nbrs, &DR (oi)); | |
543 | /* Describe Type 2 link. */ | |
544 | if (dr && (dr->state == NSM_Full || | |
545 | IPV4_ADDR_SAME (&oi->address->u.prefix4, &DR (oi))) && | |
68980084 | 546 | ospf_nbr_count (oi, NSM_Full) > 0) |
718e3744 | 547 | { |
cbf435cb CF |
548 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
549 | zlog_debug ("LSA[Type1]: Interface %s has a DR. " | |
550 | "Adding transit interface", oi->ifp->name); | |
779adb01 | 551 | return link_info_set (s, DR (oi), oi->address->u.prefix4, |
552 | LSA_LINK_TYPE_TRANSIT, 0, cost); | |
718e3744 | 553 | } |
554 | /* Describe type 3 link. */ | |
555 | else | |
556 | { | |
cbf435cb CF |
557 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
558 | zlog_debug ("LSA[Type1]: Interface %s has no DR. " | |
559 | "Adding stub interface", oi->ifp->name); | |
718e3744 | 560 | masklen2ip (oi->address->prefixlen, &mask); |
561 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 562 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
563 | oi->output_cost); | |
718e3744 | 564 | } |
718e3744 | 565 | } |
566 | ||
4dadc291 | 567 | static int |
718e3744 | 568 | lsa_link_loopback_set (struct stream *s, struct ospf_interface *oi) |
569 | { | |
570 | struct in_addr id, mask; | |
88d6cf37 | 571 | |
718e3744 | 572 | /* Describe Type 3 Link. */ |
573 | if (oi->state != ISM_Loopback) | |
574 | return 0; | |
575 | ||
576 | mask.s_addr = 0xffffffff; | |
577 | id.s_addr = oi->address->u.prefix4.s_addr; | |
a1a5410e | 578 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); |
718e3744 | 579 | } |
580 | ||
581 | /* Describe Virtual Link. */ | |
4dadc291 | 582 | static int |
718e3744 | 583 | lsa_link_virtuallink_set (struct stream *s, struct ospf_interface *oi) |
584 | { | |
585 | struct ospf_neighbor *nbr; | |
88d6cf37 | 586 | u_int16_t cost = ospf_link_cost (oi); |
718e3744 | 587 | |
718e3744 | 588 | if (oi->state == ISM_PointToPoint) |
68980084 | 589 | if ((nbr = ospf_nbr_lookup_ptop (oi))) |
718e3744 | 590 | if (nbr->state == NSM_Full) |
591 | { | |
779adb01 | 592 | return link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
593 | LSA_LINK_TYPE_VIRTUALLINK, 0, cost); | |
718e3744 | 594 | } |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
599 | #define lsa_link_nbma_set(S,O) lsa_link_broadcast_set (S, O) | |
600 | ||
7afa08da | 601 | /* this function add for support point-to-multipoint ,see rfc2328 |
602 | 12.4.1.4.*/ | |
603 | /* from "edward rrr" <edward_rrr@hotmail.com> | |
604 | http://marc.theaimsgroup.com/?l=zebra&m=100739222210507&w=2 */ | |
4dadc291 | 605 | static int |
68980084 | 606 | lsa_link_ptomp_set (struct stream *s, struct ospf_interface *oi) |
7afa08da | 607 | { |
608 | int links = 0; | |
609 | struct route_node *rn; | |
610 | struct ospf_neighbor *nbr = NULL; | |
611 | struct in_addr id, mask; | |
88d6cf37 | 612 | u_int16_t cost = ospf_link_cost (oi); |
7afa08da | 613 | |
614 | mask.s_addr = 0xffffffff; | |
615 | id.s_addr = oi->address->u.prefix4.s_addr; | |
779adb01 | 616 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); |
7afa08da | 617 | |
1cc8f762 | 618 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 619 | zlog_debug ("PointToMultipoint: running ptomultip_set"); |
7afa08da | 620 | |
621 | /* Search neighbor, */ | |
622 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
623 | if ((nbr = rn->info) != NULL) | |
624 | /* Ignore myself. */ | |
68980084 | 625 | if (!IPV4_ADDR_SAME (&nbr->router_id, &oi->ospf->router_id)) |
7afa08da | 626 | if (nbr->state == NSM_Full) |
627 | ||
628 | { | |
779adb01 | 629 | links += link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
630 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
1cc8f762 | 631 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 632 | zlog_debug ("PointToMultipoint: set link to %s", |
1cc8f762 | 633 | inet_ntoa(oi->address->u.prefix4)); |
7afa08da | 634 | } |
635 | ||
636 | return links; | |
7afa08da | 637 | } |
638 | ||
718e3744 | 639 | /* Set router-LSA link information. */ |
4dadc291 | 640 | static int |
718e3744 | 641 | router_lsa_link_set (struct stream *s, struct ospf_area *area) |
642 | { | |
52dc7ee6 | 643 | struct listnode *node; |
1eb8ef25 | 644 | struct ospf_interface *oi; |
718e3744 | 645 | int links = 0; |
646 | ||
1eb8ef25 | 647 | for (ALL_LIST_ELEMENTS_RO (area->oiflist, node, oi)) |
718e3744 | 648 | { |
718e3744 | 649 | struct interface *ifp = oi->ifp; |
650 | ||
651 | /* Check interface is up, OSPF is enable. */ | |
2e3b2e47 | 652 | if (if_is_operative (ifp)) |
718e3744 | 653 | { |
654 | if (oi->state != ISM_Down) | |
655 | { | |
c81ee5c9 | 656 | oi->lsa_pos_beg = links; |
718e3744 | 657 | /* Describe each link. */ |
658 | switch (oi->type) | |
659 | { | |
660 | case OSPF_IFTYPE_POINTOPOINT: | |
661 | links += lsa_link_ptop_set (s, oi); | |
662 | break; | |
663 | case OSPF_IFTYPE_BROADCAST: | |
664 | links += lsa_link_broadcast_set (s, oi); | |
665 | break; | |
666 | case OSPF_IFTYPE_NBMA: | |
667 | links += lsa_link_nbma_set (s, oi); | |
668 | break; | |
669 | case OSPF_IFTYPE_POINTOMULTIPOINT: | |
68980084 | 670 | links += lsa_link_ptomp_set (s, oi); |
718e3744 | 671 | break; |
672 | case OSPF_IFTYPE_VIRTUALLINK: | |
673 | links += lsa_link_virtuallink_set (s, oi); | |
674 | break; | |
675 | case OSPF_IFTYPE_LOOPBACK: | |
676 | links += lsa_link_loopback_set (s, oi); | |
677 | } | |
c81ee5c9 | 678 | oi->lsa_pos_end = links; |
718e3744 | 679 | } |
680 | } | |
681 | } | |
682 | ||
683 | return links; | |
684 | } | |
685 | ||
686 | /* Set router-LSA body. */ | |
4dadc291 | 687 | static void |
718e3744 | 688 | ospf_router_lsa_body_set (struct stream *s, struct ospf_area *area) |
689 | { | |
690 | unsigned long putp; | |
691 | u_int16_t cnt; | |
692 | ||
693 | /* Set flags. */ | |
694 | stream_putc (s, router_lsa_flags (area)); | |
695 | ||
696 | /* Set Zero fields. */ | |
697 | stream_putc (s, 0); | |
698 | ||
699 | /* Keep pointer to # links. */ | |
9985f83c | 700 | putp = stream_get_endp(s); |
718e3744 | 701 | |
702 | /* Forward word */ | |
703 | stream_putw(s, 0); | |
704 | ||
705 | /* Set all link information. */ | |
706 | cnt = router_lsa_link_set (s, area); | |
707 | ||
708 | /* Set # of links here. */ | |
709 | stream_putw_at (s, putp, cnt); | |
710 | } | |
6b0655a2 | 711 | |
88d6cf37 | 712 | static int |
713 | ospf_stub_router_timer (struct thread *t) | |
714 | { | |
715 | struct ospf_area *area = THREAD_ARG (t); | |
716 | ||
717 | area->t_stub_router = NULL; | |
718 | ||
719 | SET_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
720 | ||
721 | /* clear stub route state and generate router-lsa refresh, don't | |
722 | * clobber an administratively set stub-router state though. | |
723 | */ | |
724 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
725 | return 0; | |
726 | ||
727 | UNSET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
728 | ||
c363d386 | 729 | ospf_router_lsa_update_area (area); |
88d6cf37 | 730 | |
731 | return 0; | |
732 | } | |
718e3744 | 733 | |
f63f06da | 734 | static void |
88d6cf37 | 735 | ospf_stub_router_check (struct ospf_area *area) |
736 | { | |
737 | /* area must either be administratively configured to be stub | |
738 | * or startup-time stub-router must be configured and we must in a pre-stub | |
739 | * state. | |
740 | */ | |
741 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
742 | { | |
743 | SET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
744 | return; | |
745 | } | |
746 | ||
747 | /* not admin-stubbed, check whether startup stubbing is configured and | |
748 | * whether it's not been done yet | |
749 | */ | |
750 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED)) | |
751 | return; | |
752 | ||
753 | if (area->ospf->stub_router_startup_time == OSPF_STUB_ROUTER_UNCONFIGURED) | |
754 | { | |
755 | /* stub-router is hence done forever for this area, even if someone | |
756 | * tries configure it (take effect next restart). | |
757 | */ | |
758 | SET_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
759 | return; | |
760 | } | |
761 | ||
762 | /* startup stub-router configured and not yet done */ | |
763 | SET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
764 | ||
765 | OSPF_AREA_TIMER_ON (area->t_stub_router, ospf_stub_router_timer, | |
766 | area->ospf->stub_router_startup_time); | |
767 | } | |
6b0655a2 | 768 | |
718e3744 | 769 | /* Create new router-LSA. */ |
4dadc291 | 770 | static struct ospf_lsa * |
718e3744 | 771 | ospf_router_lsa_new (struct ospf_area *area) |
772 | { | |
68980084 | 773 | struct ospf *ospf = area->ospf; |
718e3744 | 774 | struct stream *s; |
775 | struct lsa_header *lsah; | |
776 | struct ospf_lsa *new; | |
777 | int length; | |
778 | ||
779 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 780 | zlog_debug ("LSA[Type1]: Create router-LSA instance"); |
718e3744 | 781 | |
88d6cf37 | 782 | /* check whether stub-router is desired, and if this is the first |
783 | * router LSA. | |
784 | */ | |
785 | ospf_stub_router_check (area); | |
786 | ||
718e3744 | 787 | /* Create a stream for LSA. */ |
788 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
718e3744 | 789 | /* Set LSA common header fields. */ |
d4a53d58 | 790 | lsa_header_set (s, LSA_OPTIONS_GET (area) | LSA_OPTIONS_NSSA_GET (area), |
d4a53d58 | 791 | OSPF_ROUTER_LSA, ospf->router_id, ospf->router_id); |
718e3744 | 792 | |
793 | /* Set router-LSA body fields. */ | |
794 | ospf_router_lsa_body_set (s, area); | |
795 | ||
796 | /* Set length. */ | |
797 | length = stream_get_endp (s); | |
779adb01 | 798 | lsah = (struct lsa_header *) STREAM_DATA (s); |
718e3744 | 799 | lsah->length = htons (length); |
800 | ||
801 | /* Now, create OSPF LSA instance. */ | |
c24d602e | 802 | if ( (new = ospf_lsa_new ()) == NULL) |
803 | { | |
804 | zlog_err ("%s: Unable to create new lsa", __func__); | |
805 | return NULL; | |
806 | } | |
807 | ||
718e3744 | 808 | new->area = area; |
f6543138 | 809 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 810 | |
811 | /* Copy LSA data to store, discard stream. */ | |
812 | new->data = ospf_lsa_data_new (length); | |
813 | memcpy (new->data, lsah, length); | |
814 | stream_free (s); | |
815 | ||
816 | return new; | |
817 | } | |
818 | ||
819 | /* Originate Router-LSA. */ | |
88d6cf37 | 820 | static struct ospf_lsa * |
718e3744 | 821 | ospf_router_lsa_originate (struct ospf_area *area) |
822 | { | |
823 | struct ospf_lsa *new; | |
88d6cf37 | 824 | |
718e3744 | 825 | /* Create new router-LSA instance. */ |
c24d602e | 826 | if ( (new = ospf_router_lsa_new (area)) == NULL) |
827 | { | |
828 | zlog_err ("%s: ospf_router_lsa_new returned NULL", __func__); | |
829 | return NULL; | |
830 | } | |
718e3744 | 831 | |
832 | /* Sanity check. */ | |
833 | if (new->data->adv_router.s_addr == 0) | |
834 | { | |
835 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 836 | zlog_debug ("LSA[Type1]: AdvRouter is 0, discard"); |
718e3744 | 837 | ospf_lsa_discard (new); |
838 | return NULL; | |
839 | } | |
840 | ||
841 | /* Install LSA to LSDB. */ | |
68980084 | 842 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 843 | |
844 | /* Update LSA origination count. */ | |
68980084 | 845 | area->ospf->lsa_originate_count++; |
718e3744 | 846 | |
847 | /* Flooding new LSA through area. */ | |
848 | ospf_flood_through_area (area, NULL, new); | |
849 | ||
850 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
851 | { | |
e588f21f | 852 | zlog_debug ("LSA[Type%d:%s]: Originate router-LSA %p", |
6c4f4e6e | 853 | new->data->type, inet_ntoa (new->data->id), (void *)new); |
718e3744 | 854 | ospf_lsa_header_dump (new->data); |
855 | } | |
856 | ||
857 | return new; | |
858 | } | |
859 | ||
860 | /* Refresh router-LSA. */ | |
4dadc291 | 861 | static struct ospf_lsa * |
718e3744 | 862 | ospf_router_lsa_refresh (struct ospf_lsa *lsa) |
863 | { | |
864 | struct ospf_area *area = lsa->area; | |
865 | struct ospf_lsa *new; | |
866 | ||
867 | /* Sanity check. */ | |
868 | assert (lsa->data); | |
869 | ||
870 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 871 | ospf_ls_retransmit_delete_nbr_area (area, lsa); |
718e3744 | 872 | |
c363d386 PJ |
873 | /* Unregister LSA from refresh-list */ |
874 | ospf_refresher_unregister_lsa (area->ospf, lsa); | |
875 | ||
718e3744 | 876 | /* Create new router-LSA instance. */ |
c24d602e | 877 | if ( (new = ospf_router_lsa_new (area)) == NULL) |
878 | { | |
879 | zlog_err ("%s: ospf_router_lsa_new returned NULL", __func__); | |
880 | return NULL; | |
881 | } | |
882 | ||
718e3744 | 883 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); |
884 | ||
68980084 | 885 | ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 886 | |
887 | /* Flood LSA through area. */ | |
888 | ospf_flood_through_area (area, NULL, new); | |
889 | ||
890 | /* Debug logging. */ | |
891 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
892 | { | |
e588f21f | 893 | zlog_debug ("LSA[Type%d:%s]: router-LSA refresh", |
718e3744 | 894 | new->data->type, inet_ntoa (new->data->id)); |
895 | ospf_lsa_header_dump (new->data); | |
896 | } | |
897 | ||
898 | return NULL; | |
899 | } | |
900 | ||
c363d386 PJ |
901 | int |
902 | ospf_router_lsa_update_area (struct ospf_area *area) | |
718e3744 | 903 | { |
718e3744 | 904 | if (IS_DEBUG_OSPF_EVENT) |
c363d386 | 905 | zlog_debug ("[router-LSA]: (router-LSA area update)"); |
718e3744 | 906 | |
907 | /* Now refresh router-LSA. */ | |
908 | if (area->router_lsa_self) | |
c363d386 | 909 | ospf_lsa_refresh (area->ospf, area->router_lsa_self); |
718e3744 | 910 | /* Newly originate router-LSA. */ |
911 | else | |
912 | ospf_router_lsa_originate (area); | |
913 | ||
914 | return 0; | |
915 | } | |
916 | ||
718e3744 | 917 | int |
c363d386 | 918 | ospf_router_lsa_update (struct ospf *ospf) |
718e3744 | 919 | { |
1eb8ef25 | 920 | struct listnode *node, *nnode; |
921 | struct ospf_area *area; | |
718e3744 | 922 | |
923 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 924 | zlog_debug ("Timer[router-LSA Update]: (timer expire)"); |
718e3744 | 925 | |
1eb8ef25 | 926 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 927 | { |
718e3744 | 928 | struct ospf_lsa *lsa = area->router_lsa_self; |
929 | struct router_lsa *rl; | |
eb1ce605 | 930 | const char *area_str; |
718e3744 | 931 | |
932 | /* Keep Area ID string. */ | |
933 | area_str = AREA_NAME (area); | |
934 | ||
935 | /* If LSA not exist in this Area, originate new. */ | |
936 | if (lsa == NULL) | |
937 | { | |
938 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 939 | zlog_debug("LSA[Type1]: Create router-LSA for Area %s", area_str); |
718e3744 | 940 | |
941 | ospf_router_lsa_originate (area); | |
942 | } | |
943 | /* If router-ID is changed, Link ID must change. | |
944 | First flush old LSA, then originate new. */ | |
68980084 | 945 | else if (!IPV4_ADDR_SAME (&lsa->data->id, &ospf->router_id)) |
718e3744 | 946 | { |
947 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 948 | zlog_debug("LSA[Type%d:%s]: Refresh router-LSA for Area %s", |
718e3744 | 949 | lsa->data->type, inet_ntoa (lsa->data->id), area_str); |
dfbd5176 | 950 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 951 | ospf_lsa_flush_area (lsa, area); |
1fe6ed38 | 952 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 953 | area->router_lsa_self = NULL; |
954 | ||
955 | /* Refresh router-LSA, (not install) and flood through area. */ | |
c363d386 | 956 | ospf_router_lsa_update_area (area); |
718e3744 | 957 | } |
958 | else | |
959 | { | |
960 | rl = (struct router_lsa *) lsa->data; | |
961 | /* Refresh router-LSA, (not install) and flood through area. */ | |
68980084 | 962 | if (rl->flags != ospf->flags) |
c363d386 | 963 | ospf_router_lsa_update_area (area); |
718e3744 | 964 | } |
965 | } | |
966 | ||
967 | return 0; | |
968 | } | |
969 | ||
6b0655a2 | 970 | |
718e3744 | 971 | /* network-LSA related functions. */ |
972 | /* Originate Network-LSA. */ | |
4dadc291 | 973 | static void |
718e3744 | 974 | ospf_network_lsa_body_set (struct stream *s, struct ospf_interface *oi) |
975 | { | |
976 | struct in_addr mask; | |
977 | struct route_node *rn; | |
978 | struct ospf_neighbor *nbr; | |
979 | ||
980 | masklen2ip (oi->address->prefixlen, &mask); | |
981 | stream_put_ipv4 (s, mask.s_addr); | |
982 | ||
983 | /* The network-LSA lists those routers that are fully adjacent to | |
984 | the Designated Router; each fully adjacent router is identified by | |
985 | its OSPF Router ID. The Designated Router includes itself in this | |
986 | list. RFC2328, Section 12.4.2 */ | |
987 | ||
988 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
989 | if ((nbr = rn->info) != NULL) | |
990 | if (nbr->state == NSM_Full || nbr == oi->nbr_self) | |
991 | stream_put_ipv4 (s, nbr->router_id.s_addr); | |
992 | } | |
993 | ||
4dadc291 | 994 | static struct ospf_lsa * |
718e3744 | 995 | ospf_network_lsa_new (struct ospf_interface *oi) |
996 | { | |
997 | struct stream *s; | |
998 | struct ospf_lsa *new; | |
999 | struct lsa_header *lsah; | |
7eb5b47e | 1000 | struct ospf_if_params *oip; |
718e3744 | 1001 | int length; |
1002 | ||
1003 | /* If there are no neighbours on this network (the net is stub), | |
1004 | the router does not originate network-LSA (see RFC 12.4.2) */ | |
1005 | if (oi->full_nbrs == 0) | |
1006 | return NULL; | |
1007 | ||
1008 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1009 | zlog_debug ("LSA[Type2]: Create network-LSA instance"); |
718e3744 | 1010 | |
1011 | /* Create new stream for LSA. */ | |
1012 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1013 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1014 | ||
1015 | lsa_header_set (s, (OPTIONS (oi) | LSA_OPTIONS_GET (oi->area)), | |
68980084 | 1016 | OSPF_NETWORK_LSA, DR (oi), oi->ospf->router_id); |
718e3744 | 1017 | |
1018 | /* Set network-LSA body fields. */ | |
1019 | ospf_network_lsa_body_set (s, oi); | |
1020 | ||
1021 | /* Set length. */ | |
1022 | length = stream_get_endp (s); | |
1023 | lsah->length = htons (length); | |
1024 | ||
1025 | /* Create OSPF LSA instance. */ | |
c24d602e | 1026 | if ( (new = ospf_lsa_new ()) == NULL) |
1027 | { | |
1028 | zlog_err ("%s: ospf_lsa_new returned NULL", __func__); | |
1029 | return NULL; | |
1030 | } | |
1031 | ||
718e3744 | 1032 | new->area = oi->area; |
f6543138 | 1033 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1034 | |
1035 | /* Copy LSA to store. */ | |
1036 | new->data = ospf_lsa_data_new (length); | |
1037 | memcpy (new->data, lsah, length); | |
1038 | stream_free (s); | |
7eb5b47e PJ |
1039 | |
1040 | /* Remember prior network LSA sequence numbers, even if we stop | |
1041 | * originating one for this oi, to try avoid re-originating LSAs with a | |
1042 | * prior sequence number, and thus speed up adjency forming & convergence. | |
1043 | */ | |
1044 | if ((oip = ospf_lookup_if_params (oi->ifp, oi->address->u.prefix4))) | |
1045 | { | |
1046 | new->data->ls_seqnum = oip->network_lsa_seqnum; | |
1047 | new->data->ls_seqnum = lsa_seqnum_increment (new); | |
1048 | } | |
1049 | else | |
1050 | { | |
1051 | oip = ospf_get_if_params (oi->ifp, oi->address->u.prefix4); | |
1052 | ospf_if_update_params (oi->ifp, oi->address->u.prefix4); | |
1053 | } | |
1054 | oip->network_lsa_seqnum = new->data->ls_seqnum; | |
1055 | ||
718e3744 | 1056 | return new; |
1057 | } | |
1058 | ||
1059 | /* Originate network-LSA. */ | |
c363d386 PJ |
1060 | void |
1061 | ospf_network_lsa_update (struct ospf_interface *oi) | |
718e3744 | 1062 | { |
1063 | struct ospf_lsa *new; | |
c363d386 PJ |
1064 | |
1065 | if (oi->network_lsa_self != NULL) | |
1066 | { | |
1067 | ospf_lsa_refresh (oi->ospf, oi->network_lsa_self); | |
1068 | return; | |
1069 | } | |
1070 | ||
718e3744 | 1071 | /* Create new network-LSA instance. */ |
1072 | new = ospf_network_lsa_new (oi); | |
1073 | if (new == NULL) | |
c363d386 | 1074 | return; |
718e3744 | 1075 | |
1076 | /* Install LSA to LSDB. */ | |
68980084 | 1077 | new = ospf_lsa_install (oi->ospf, oi, new); |
718e3744 | 1078 | |
1079 | /* Update LSA origination count. */ | |
68980084 | 1080 | oi->ospf->lsa_originate_count++; |
718e3744 | 1081 | |
1082 | /* Flooding new LSA through area. */ | |
1083 | ospf_flood_through_area (oi->area, NULL, new); | |
1084 | ||
1085 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1086 | { | |
e588f21f | 1087 | zlog_debug ("LSA[Type%d:%s]: Originate network-LSA %p", |
6c4f4e6e | 1088 | new->data->type, inet_ntoa (new->data->id), (void *)new); |
718e3744 | 1089 | ospf_lsa_header_dump (new->data); |
1090 | } | |
1091 | ||
c363d386 | 1092 | return; |
718e3744 | 1093 | } |
1094 | ||
c363d386 PJ |
1095 | static struct ospf_lsa * |
1096 | ospf_network_lsa_refresh (struct ospf_lsa *lsa) | |
718e3744 | 1097 | { |
1098 | struct ospf_area *area = lsa->area; | |
c363d386 | 1099 | struct ospf_lsa *new, *new2; |
7eb5b47e | 1100 | struct ospf_if_params *oip; |
4dd87df5 | 1101 | struct ospf_interface *oi; |
c363d386 | 1102 | |
718e3744 | 1103 | assert (lsa->data); |
4dd87df5 PJ |
1104 | |
1105 | /* Retrieve the oi for the network LSA */ | |
1106 | oi = ospf_if_lookup_by_local_addr (area->ospf, NULL, lsa->data->id); | |
1107 | if (oi == NULL) | |
1108 | { | |
1109 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1110 | { | |
1111 | zlog_debug ("LSA[Type%d:%s]: network-LSA refresh: " | |
1112 | "no oi found, ick, ignoring.", | |
1113 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
1114 | ospf_lsa_header_dump (lsa->data); | |
1115 | } | |
1116 | return NULL; | |
1117 | } | |
718e3744 | 1118 | /* Delete LSA from neighbor retransmit-list. */ |
68980084 | 1119 | ospf_ls_retransmit_delete_nbr_area (area, lsa); |
718e3744 | 1120 | |
c363d386 PJ |
1121 | /* Unregister LSA from refresh-list */ |
1122 | ospf_refresher_unregister_lsa (area->ospf, lsa); | |
1123 | ||
718e3744 | 1124 | /* Create new network-LSA instance. */ |
1125 | new = ospf_network_lsa_new (oi); | |
1126 | if (new == NULL) | |
c363d386 | 1127 | return NULL; |
7eb5b47e PJ |
1128 | |
1129 | oip = ospf_lookup_if_params (oi->ifp, oi->address->u.prefix4); | |
1130 | assert (oip != NULL); | |
1131 | oip->network_lsa_seqnum = new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
718e3744 | 1132 | |
c363d386 PJ |
1133 | new2 = ospf_lsa_install (area->ospf, oi, new); |
1134 | ||
1135 | assert (new2 == new); | |
1136 | ||
718e3744 | 1137 | /* Flood LSA through aera. */ |
1138 | ospf_flood_through_area (area, NULL, new); | |
1139 | ||
1140 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1141 | { | |
e588f21f | 1142 | zlog_debug ("LSA[Type%d:%s]: network-LSA refresh", |
718e3744 | 1143 | new->data->type, inet_ntoa (new->data->id)); |
1144 | ospf_lsa_header_dump (new->data); | |
1145 | } | |
1146 | ||
c363d386 | 1147 | return new; |
718e3744 | 1148 | } |
6b0655a2 | 1149 | |
4dadc291 | 1150 | static void |
718e3744 | 1151 | stream_put_ospf_metric (struct stream *s, u_int32_t metric_value) |
1152 | { | |
1153 | u_int32_t metric; | |
1154 | char *mp; | |
1155 | ||
1156 | /* Put 0 metric. TOS metric is not supported. */ | |
1157 | metric = htonl (metric_value); | |
1158 | mp = (char *) &metric; | |
1159 | mp++; | |
1160 | stream_put (s, mp, 3); | |
1161 | } | |
1162 | ||
1163 | /* summary-LSA related functions. */ | |
4dadc291 | 1164 | static void |
718e3744 | 1165 | ospf_summary_lsa_body_set (struct stream *s, struct prefix *p, |
1166 | u_int32_t metric) | |
1167 | { | |
1168 | struct in_addr mask; | |
1169 | ||
1170 | masklen2ip (p->prefixlen, &mask); | |
1171 | ||
1172 | /* Put Network Mask. */ | |
1173 | stream_put_ipv4 (s, mask.s_addr); | |
1174 | ||
1175 | /* Set # TOS. */ | |
1176 | stream_putc (s, (u_char) 0); | |
1177 | ||
1178 | /* Set metric. */ | |
1179 | stream_put_ospf_metric (s, metric); | |
1180 | } | |
1181 | ||
4dadc291 | 1182 | static struct ospf_lsa * |
718e3744 | 1183 | ospf_summary_lsa_new (struct ospf_area *area, struct prefix *p, |
1184 | u_int32_t metric, struct in_addr id) | |
1185 | { | |
1186 | struct stream *s; | |
1187 | struct ospf_lsa *new; | |
1188 | struct lsa_header *lsah; | |
1189 | int length; | |
1190 | ||
c24d602e | 1191 | if (id.s_addr == 0xffffffff) |
1192 | { | |
1193 | /* Maybe Link State ID not available. */ | |
1194 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1195 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1196 | OSPF_SUMMARY_LSA); | |
1197 | return NULL; | |
1198 | } | |
1199 | ||
718e3744 | 1200 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 1201 | zlog_debug ("LSA[Type3]: Create summary-LSA instance"); |
718e3744 | 1202 | |
1203 | /* Create new stream for LSA. */ | |
1204 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1205 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1206 | ||
68980084 | 1207 | lsa_header_set (s, LSA_OPTIONS_GET (area), OSPF_SUMMARY_LSA, |
1208 | id, area->ospf->router_id); | |
718e3744 | 1209 | |
1210 | /* Set summary-LSA body fields. */ | |
1211 | ospf_summary_lsa_body_set (s, p, metric); | |
1212 | ||
1213 | /* Set length. */ | |
1214 | length = stream_get_endp (s); | |
1215 | lsah->length = htons (length); | |
1216 | ||
1217 | /* Create OSPF LSA instance. */ | |
1218 | new = ospf_lsa_new (); | |
1219 | new->area = area; | |
f6543138 | 1220 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1221 | |
1222 | /* Copy LSA to store. */ | |
1223 | new->data = ospf_lsa_data_new (length); | |
1224 | memcpy (new->data, lsah, length); | |
1225 | stream_free (s); | |
1226 | ||
1227 | return new; | |
1228 | } | |
1229 | ||
1230 | /* Originate Summary-LSA. */ | |
1231 | struct ospf_lsa * | |
1232 | ospf_summary_lsa_originate (struct prefix_ipv4 *p, u_int32_t metric, | |
1233 | struct ospf_area *area) | |
1234 | { | |
1235 | struct ospf_lsa *new; | |
1236 | struct in_addr id; | |
1237 | ||
68980084 | 1238 | id = ospf_lsa_unique_id (area->ospf, area->lsdb, OSPF_SUMMARY_LSA, p); |
718e3744 | 1239 | |
c24d602e | 1240 | if (id.s_addr == 0xffffffff) |
1241 | { | |
1242 | /* Maybe Link State ID not available. */ | |
1243 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1244 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1245 | OSPF_SUMMARY_LSA); | |
1246 | return NULL; | |
1247 | } | |
1248 | ||
718e3744 | 1249 | /* Create new summary-LSA instance. */ |
c24d602e | 1250 | if ( !(new = ospf_summary_lsa_new (area, (struct prefix *) p, metric, id))) |
1251 | return NULL; | |
718e3744 | 1252 | |
1253 | /* Instlal LSA to LSDB. */ | |
68980084 | 1254 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 1255 | |
1256 | /* Update LSA origination count. */ | |
68980084 | 1257 | area->ospf->lsa_originate_count++; |
718e3744 | 1258 | |
1259 | /* Flooding new LSA through area. */ | |
1260 | ospf_flood_through_area (area, NULL, new); | |
1261 | ||
1262 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1263 | { | |
e588f21f | 1264 | zlog_debug ("LSA[Type%d:%s]: Originate summary-LSA %p", |
6c4f4e6e | 1265 | new->data->type, inet_ntoa (new->data->id), (void *)new); |
718e3744 | 1266 | ospf_lsa_header_dump (new->data); |
1267 | } | |
1268 | ||
1269 | return new; | |
1270 | } | |
1271 | ||
c363d386 | 1272 | static struct ospf_lsa* |
68980084 | 1273 | ospf_summary_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1274 | { |
1275 | struct ospf_lsa *new; | |
1276 | struct summary_lsa *sl; | |
1277 | struct prefix p; | |
1278 | ||
1279 | /* Sanity check. */ | |
1280 | assert (lsa->data); | |
1281 | ||
1282 | sl = (struct summary_lsa *)lsa->data; | |
1283 | p.prefixlen = ip_masklen (sl->mask); | |
1284 | new = ospf_summary_lsa_new (lsa->area, &p, GET_METRIC (sl->metric), | |
1285 | sl->header.id); | |
c24d602e | 1286 | |
1287 | if (!new) | |
1288 | return NULL; | |
1289 | ||
718e3744 | 1290 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); |
718e3744 | 1291 | |
68980084 | 1292 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 1293 | |
1294 | /* Flood LSA through AS. */ | |
1295 | ospf_flood_through_area (new->area, NULL, new); | |
1296 | ||
1297 | /* Debug logging. */ | |
1298 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1299 | { | |
e588f21f | 1300 | zlog_debug ("LSA[Type%d:%s]: summary-LSA refresh", |
718e3744 | 1301 | new->data->type, inet_ntoa (new->data->id)); |
1302 | ospf_lsa_header_dump (new->data); | |
1303 | } | |
1304 | ||
1305 | return new; | |
1306 | } | |
1307 | ||
6b0655a2 | 1308 | |
718e3744 | 1309 | /* summary-ASBR-LSA related functions. */ |
4dadc291 | 1310 | static void |
718e3744 | 1311 | ospf_summary_asbr_lsa_body_set (struct stream *s, struct prefix *p, |
1312 | u_int32_t metric) | |
1313 | { | |
718e3744 | 1314 | /* Put Network Mask. */ |
2345a222 | 1315 | stream_put_ipv4 (s, (u_int32_t) 0); |
718e3744 | 1316 | |
1317 | /* Set # TOS. */ | |
1318 | stream_putc (s, (u_char) 0); | |
1319 | ||
1320 | /* Set metric. */ | |
1321 | stream_put_ospf_metric (s, metric); | |
1322 | } | |
1323 | ||
4dadc291 | 1324 | static struct ospf_lsa * |
718e3744 | 1325 | ospf_summary_asbr_lsa_new (struct ospf_area *area, struct prefix *p, |
1326 | u_int32_t metric, struct in_addr id) | |
1327 | { | |
1328 | struct stream *s; | |
1329 | struct ospf_lsa *new; | |
1330 | struct lsa_header *lsah; | |
1331 | int length; | |
1332 | ||
c24d602e | 1333 | if (id.s_addr == 0xffffffff) |
1334 | { | |
1335 | /* Maybe Link State ID not available. */ | |
1336 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1337 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1338 | OSPF_ASBR_SUMMARY_LSA); | |
1339 | return NULL; | |
1340 | } | |
1341 | ||
718e3744 | 1342 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 1343 | zlog_debug ("LSA[Type3]: Create summary-LSA instance"); |
718e3744 | 1344 | |
1345 | /* Create new stream for LSA. */ | |
1346 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1347 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1348 | ||
68980084 | 1349 | lsa_header_set (s, LSA_OPTIONS_GET (area), OSPF_ASBR_SUMMARY_LSA, |
1350 | id, area->ospf->router_id); | |
718e3744 | 1351 | |
1352 | /* Set summary-LSA body fields. */ | |
1353 | ospf_summary_asbr_lsa_body_set (s, p, metric); | |
1354 | ||
1355 | /* Set length. */ | |
1356 | length = stream_get_endp (s); | |
1357 | lsah->length = htons (length); | |
1358 | ||
1359 | /* Create OSPF LSA instance. */ | |
1360 | new = ospf_lsa_new (); | |
1361 | new->area = area; | |
f6543138 | 1362 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1363 | |
1364 | /* Copy LSA to store. */ | |
1365 | new->data = ospf_lsa_data_new (length); | |
1366 | memcpy (new->data, lsah, length); | |
1367 | stream_free (s); | |
1368 | ||
1369 | return new; | |
1370 | } | |
1371 | ||
1372 | /* Originate summary-ASBR-LSA. */ | |
1373 | struct ospf_lsa * | |
1374 | ospf_summary_asbr_lsa_originate (struct prefix_ipv4 *p, u_int32_t metric, | |
1375 | struct ospf_area *area) | |
1376 | { | |
1377 | struct ospf_lsa *new; | |
1378 | struct in_addr id; | |
1379 | ||
68980084 | 1380 | id = ospf_lsa_unique_id (area->ospf, area->lsdb, OSPF_ASBR_SUMMARY_LSA, p); |
718e3744 | 1381 | |
c24d602e | 1382 | if (id.s_addr == 0xffffffff) |
1383 | { | |
1384 | /* Maybe Link State ID not available. */ | |
1385 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1386 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1387 | OSPF_ASBR_SUMMARY_LSA); | |
1388 | return NULL; | |
1389 | } | |
1390 | ||
718e3744 | 1391 | /* Create new summary-LSA instance. */ |
1392 | new = ospf_summary_asbr_lsa_new (area, (struct prefix *) p, metric, id); | |
c24d602e | 1393 | if (!new) |
1394 | return NULL; | |
718e3744 | 1395 | |
1396 | /* Install LSA to LSDB. */ | |
68980084 | 1397 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 1398 | |
1399 | /* Update LSA origination count. */ | |
68980084 | 1400 | area->ospf->lsa_originate_count++; |
718e3744 | 1401 | |
1402 | /* Flooding new LSA through area. */ | |
1403 | ospf_flood_through_area (area, NULL, new); | |
1404 | ||
1405 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1406 | { | |
e588f21f | 1407 | zlog_debug ("LSA[Type%d:%s]: Originate summary-ASBR-LSA %p", |
6c4f4e6e | 1408 | new->data->type, inet_ntoa (new->data->id), (void *)new); |
718e3744 | 1409 | ospf_lsa_header_dump (new->data); |
1410 | } | |
1411 | ||
1412 | return new; | |
1413 | } | |
1414 | ||
c363d386 | 1415 | static struct ospf_lsa* |
68980084 | 1416 | ospf_summary_asbr_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1417 | { |
1418 | struct ospf_lsa *new; | |
1419 | struct summary_lsa *sl; | |
1420 | struct prefix p; | |
1421 | ||
1422 | /* Sanity check. */ | |
1423 | assert (lsa->data); | |
1424 | ||
1425 | sl = (struct summary_lsa *)lsa->data; | |
1426 | p.prefixlen = ip_masklen (sl->mask); | |
1427 | new = ospf_summary_asbr_lsa_new (lsa->area, &p, GET_METRIC (sl->metric), | |
1428 | sl->header.id); | |
c24d602e | 1429 | if (!new) |
1430 | return NULL; | |
718e3744 | 1431 | |
1432 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
718e3744 | 1433 | |
68980084 | 1434 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 1435 | |
1436 | /* Flood LSA through area. */ | |
1437 | ospf_flood_through_area (new->area, NULL, new); | |
1438 | ||
1439 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1440 | { | |
e588f21f | 1441 | zlog_debug ("LSA[Type%d:%s]: summary-ASBR-LSA refresh", |
718e3744 | 1442 | new->data->type, inet_ntoa (new->data->id)); |
1443 | ospf_lsa_header_dump (new->data); | |
1444 | } | |
1445 | ||
1446 | return new; | |
1447 | } | |
1448 | ||
1449 | /* AS-external-LSA related functions. */ | |
1450 | ||
1451 | /* Get nexthop for AS-external-LSAs. Return nexthop if its interface | |
1452 | is connected, else 0*/ | |
4dadc291 | 1453 | static struct in_addr |
68980084 | 1454 | ospf_external_lsa_nexthop_get (struct ospf *ospf, struct in_addr nexthop) |
718e3744 | 1455 | { |
1456 | struct in_addr fwd; | |
1457 | struct prefix nh; | |
1eb8ef25 | 1458 | struct listnode *node; |
1459 | struct ospf_interface *oi; | |
718e3744 | 1460 | |
1461 | fwd.s_addr = 0; | |
1462 | ||
1463 | if (!nexthop.s_addr) | |
1464 | return fwd; | |
1465 | ||
1466 | /* Check whether nexthop is covered by OSPF network. */ | |
1467 | nh.family = AF_INET; | |
1468 | nh.u.prefix4 = nexthop; | |
1469 | nh.prefixlen = IPV4_MAX_BITLEN; | |
4ca15d4a PJ |
1470 | |
1471 | /* XXX/SCALE: If there were a lot of oi's on an ifp, then it'd be | |
1472 | * better to make use of the per-ifp table of ois. | |
1473 | */ | |
1eb8ef25 | 1474 | for (ALL_LIST_ELEMENTS_RO (ospf->oiflist, node, oi)) |
1475 | if (if_is_operative (oi->ifp)) | |
1476 | if (oi->address->family == AF_INET) | |
1477 | if (prefix_match (oi->address, &nh)) | |
1478 | return nexthop; | |
718e3744 | 1479 | |
1480 | return fwd; | |
1481 | } | |
1482 | ||
718e3744 | 1483 | /* NSSA-external-LSA related functions. */ |
1484 | ||
1485 | /* Get 1st IP connection for Forward Addr */ | |
4dadc291 | 1486 | |
718e3744 | 1487 | struct in_addr |
1488 | ospf_get_ip_from_ifp (struct ospf_interface *oi) | |
1489 | { | |
1490 | struct in_addr fwd; | |
1491 | ||
1492 | fwd.s_addr = 0; | |
1493 | ||
2e3b2e47 | 1494 | if (if_is_operative (oi->ifp)) |
718e3744 | 1495 | return oi->address->u.prefix4; |
1496 | ||
1497 | return fwd; | |
1498 | } | |
1499 | ||
1500 | /* Get 1st IP connection for Forward Addr */ | |
1501 | struct in_addr | |
f2c80652 | 1502 | ospf_get_nssa_ip (struct ospf_area *area) |
718e3744 | 1503 | { |
1504 | struct in_addr fwd; | |
f2c80652 | 1505 | struct in_addr best_default; |
1eb8ef25 | 1506 | struct listnode *node; |
1507 | struct ospf_interface *oi; | |
718e3744 | 1508 | |
1509 | fwd.s_addr = 0; | |
f2c80652 | 1510 | best_default.s_addr = 0; |
718e3744 | 1511 | |
1eb8ef25 | 1512 | for (ALL_LIST_ELEMENTS_RO (area->ospf->oiflist, node, oi)) |
718e3744 | 1513 | { |
2e3b2e47 | 1514 | if (if_is_operative (oi->ifp)) |
718e3744 | 1515 | if (oi->area->external_routing == OSPF_AREA_NSSA) |
68980084 | 1516 | if (oi->address && oi->address->family == AF_INET) |
1517 | { | |
1518 | if (best_default.s_addr == 0) | |
1519 | best_default = oi->address->u.prefix4; | |
1520 | if (oi->area == area) | |
1521 | return oi->address->u.prefix4; | |
f2c80652 | 1522 | } |
718e3744 | 1523 | } |
f2c80652 | 1524 | if (best_default.s_addr != 0) |
1525 | return best_default; | |
718e3744 | 1526 | |
68980084 | 1527 | if (best_default.s_addr != 0) |
1528 | return best_default; | |
1529 | ||
718e3744 | 1530 | return fwd; |
1531 | } | |
beebba75 | 1532 | |
718e3744 | 1533 | #define DEFAULT_DEFAULT_METRIC 20 |
1534 | #define DEFAULT_DEFAULT_ORIGINATE_METRIC 10 | |
1535 | #define DEFAULT_DEFAULT_ALWAYS_METRIC 1 | |
1536 | ||
1537 | #define DEFAULT_METRIC_TYPE EXTERNAL_METRIC_TYPE_2 | |
1538 | ||
1539 | int | |
7c8ff89e | 1540 | metric_type (struct ospf *ospf, u_char src, u_short instance) |
718e3744 | 1541 | { |
7c8ff89e DS |
1542 | struct ospf_redist *red; |
1543 | ||
1544 | red = ospf_redist_lookup(ospf, src, instance); | |
1545 | ||
1546 | return ((!red || red->dmetric.type < 0) ? | |
1547 | DEFAULT_METRIC_TYPE : red->dmetric.type); | |
718e3744 | 1548 | } |
1549 | ||
1550 | int | |
7c8ff89e | 1551 | metric_value (struct ospf *ospf, u_char src, u_short instance) |
718e3744 | 1552 | { |
7c8ff89e DS |
1553 | struct ospf_redist *red; |
1554 | ||
1555 | red = ospf_redist_lookup(ospf, src, instance); | |
1556 | if (!red || red->dmetric.value < 0) | |
718e3744 | 1557 | { |
1558 | if (src == DEFAULT_ROUTE) | |
1559 | { | |
68980084 | 1560 | if (ospf->default_originate == DEFAULT_ORIGINATE_ZEBRA) |
718e3744 | 1561 | return DEFAULT_DEFAULT_ORIGINATE_METRIC; |
1562 | else | |
1563 | return DEFAULT_DEFAULT_ALWAYS_METRIC; | |
1564 | } | |
68980084 | 1565 | else if (ospf->default_metric < 0) |
718e3744 | 1566 | return DEFAULT_DEFAULT_METRIC; |
1567 | else | |
68980084 | 1568 | return ospf->default_metric; |
718e3744 | 1569 | } |
1570 | ||
7c8ff89e | 1571 | return red->dmetric.value; |
718e3744 | 1572 | } |
1573 | ||
1574 | /* Set AS-external-LSA body. */ | |
4dadc291 | 1575 | static void |
68980084 | 1576 | ospf_external_lsa_body_set (struct stream *s, struct external_info *ei, |
1577 | struct ospf *ospf) | |
718e3744 | 1578 | { |
1579 | struct prefix_ipv4 *p = &ei->p; | |
1580 | struct in_addr mask, fwd_addr; | |
1581 | u_int32_t mvalue; | |
1582 | int mtype; | |
1583 | int type; | |
7c8ff89e | 1584 | u_short instance; |
718e3744 | 1585 | |
1586 | /* Put Network Mask. */ | |
1587 | masklen2ip (p->prefixlen, &mask); | |
1588 | stream_put_ipv4 (s, mask.s_addr); | |
1589 | ||
1590 | /* If prefix is default, specify DEFAULT_ROUTE. */ | |
1591 | type = is_prefix_default (&ei->p) ? DEFAULT_ROUTE : ei->type; | |
7c8ff89e | 1592 | instance = is_prefix_default (&ei->p) ? 0 : ei->instance; |
718e3744 | 1593 | |
1594 | mtype = (ROUTEMAP_METRIC_TYPE (ei) != -1) ? | |
7c8ff89e | 1595 | ROUTEMAP_METRIC_TYPE (ei) : metric_type (ospf, type, instance); |
718e3744 | 1596 | |
1597 | mvalue = (ROUTEMAP_METRIC (ei) != -1) ? | |
7c8ff89e | 1598 | ROUTEMAP_METRIC (ei) : metric_value (ospf, type, instance); |
718e3744 | 1599 | |
1600 | /* Put type of external metric. */ | |
1601 | stream_putc (s, (mtype == EXTERNAL_METRIC_TYPE_2 ? 0x80 : 0)); | |
1602 | ||
1603 | /* Put 0 metric. TOS metric is not supported. */ | |
1604 | stream_put_ospf_metric (s, mvalue); | |
1605 | ||
1606 | /* Get forwarding address to nexthop if on the Connection List, else 0. */ | |
68980084 | 1607 | fwd_addr = ospf_external_lsa_nexthop_get (ospf, ei->nexthop); |
718e3744 | 1608 | |
1609 | /* Put forwarding address. */ | |
1610 | stream_put_ipv4 (s, fwd_addr.s_addr); | |
1611 | ||
dc9ffce8 | 1612 | /* Put route tag */ |
0d9551dc | 1613 | stream_putl (s, ei->tag); |
718e3744 | 1614 | } |
1615 | ||
1616 | /* Create new external-LSA. */ | |
4dadc291 | 1617 | static struct ospf_lsa * |
68980084 | 1618 | ospf_external_lsa_new (struct ospf *ospf, |
1619 | struct external_info *ei, struct in_addr *old_id) | |
718e3744 | 1620 | { |
1621 | struct stream *s; | |
1622 | struct lsa_header *lsah; | |
1623 | struct ospf_lsa *new; | |
1624 | struct in_addr id; | |
1625 | int length; | |
1626 | ||
1627 | if (ei == NULL) | |
1628 | { | |
1629 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
ad8d4802 | 1630 | zlog_debug ("LSA[Type5]: External info is NULL, can't originate"); |
718e3744 | 1631 | return NULL; |
1632 | } | |
1633 | ||
1634 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1635 | zlog_debug ("LSA[Type5]: Originate AS-external-LSA instance"); |
718e3744 | 1636 | |
1637 | /* If old Link State ID is specified, refresh LSA with same ID. */ | |
1638 | if (old_id) | |
1639 | id = *old_id; | |
1640 | /* Get Link State with unique ID. */ | |
1641 | else | |
1642 | { | |
68980084 | 1643 | id = ospf_lsa_unique_id (ospf, ospf->lsdb, OSPF_AS_EXTERNAL_LSA, &ei->p); |
718e3744 | 1644 | if (id.s_addr == 0xffffffff) |
1645 | { | |
1646 | /* Maybe Link State ID not available. */ | |
1647 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1648 | zlog_debug ("LSA[Type5]: Link ID not available, can't originate"); |
718e3744 | 1649 | return NULL; |
1650 | } | |
1651 | } | |
1652 | ||
1653 | /* Create new stream for LSA. */ | |
1654 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1655 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1656 | ||
1657 | /* Set LSA common header fields. */ | |
68980084 | 1658 | lsa_header_set (s, OSPF_OPTION_E, OSPF_AS_EXTERNAL_LSA, |
1659 | id, ospf->router_id); | |
718e3744 | 1660 | |
1661 | /* Set AS-external-LSA body fields. */ | |
68980084 | 1662 | ospf_external_lsa_body_set (s, ei, ospf); |
718e3744 | 1663 | |
1664 | /* Set length. */ | |
1665 | length = stream_get_endp (s); | |
1666 | lsah->length = htons (length); | |
1667 | ||
1668 | /* Now, create OSPF LSA instance. */ | |
1669 | new = ospf_lsa_new (); | |
1670 | new->area = NULL; | |
f6543138 | 1671 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_APPROVED | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1672 | |
1673 | /* Copy LSA data to store, discard stream. */ | |
1674 | new->data = ospf_lsa_data_new (length); | |
1675 | memcpy (new->data, lsah, length); | |
1676 | stream_free (s); | |
1677 | ||
1678 | return new; | |
1679 | } | |
1680 | ||
718e3744 | 1681 | /* As Type-7 */ |
4dadc291 | 1682 | static void |
68980084 | 1683 | ospf_install_flood_nssa (struct ospf *ospf, |
1684 | struct ospf_lsa *lsa, struct external_info *ei) | |
718e3744 | 1685 | { |
d4a53d58 | 1686 | struct ospf_lsa *new; |
68980084 | 1687 | struct as_external_lsa *extlsa; |
1eb8ef25 | 1688 | struct ospf_area *area; |
1689 | struct listnode *node, *nnode; | |
718e3744 | 1690 | |
d4a53d58 | 1691 | /* LSA may be a Type-5 originated via translation of a Type-7 LSA |
1692 | * which originated from an NSSA area. In which case it should not be | |
1693 | * flooded back to NSSA areas. | |
1694 | */ | |
1695 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
1696 | return; | |
1697 | ||
718e3744 | 1698 | /* NSSA Originate or Refresh (If anyNSSA) |
1699 | ||
1700 | LSA is self-originated. And just installed as Type-5. | |
1701 | Additionally, install as Type-7 LSDB for every attached NSSA. | |
1702 | ||
1703 | P-Bit controls which ABR performs translation to outside world; If | |
1704 | we are an ABR....do not set the P-bit, because we send the Type-5, | |
1705 | not as the ABR Translator, but as the ASBR owner within the AS! | |
1706 | ||
1707 | If we are NOT ABR, Flood through NSSA as Type-7 w/P-bit set. The | |
1708 | elected ABR Translator will see the P-bit, Translate, and re-flood. | |
1709 | ||
1710 | Later, ABR_TASK and P-bit will scan Type-7 LSDB and translate to | |
1711 | Type-5's to non-NSSA Areas. (it will also attempt a re-install) */ | |
1712 | ||
1eb8ef25 | 1713 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
68980084 | 1714 | { |
0c14ad88 | 1715 | /* Don't install Type-7 LSA's into nonNSSA area */ |
1716 | if (area->external_routing != OSPF_AREA_NSSA) | |
1717 | continue; | |
718e3744 | 1718 | |
68980084 | 1719 | /* make lsa duplicate, lock=1 */ |
d4a53d58 | 1720 | new = ospf_lsa_dup (lsa); |
1721 | new->area = area; | |
1722 | new->data->type = OSPF_AS_NSSA_LSA; | |
718e3744 | 1723 | |
68980084 | 1724 | /* set P-bit if not ABR */ |
020709f9 | 1725 | if (! IS_OSPF_ABR (ospf)) |
68980084 | 1726 | { |
d4a53d58 | 1727 | SET_FLAG(new->data->options, OSPF_OPTION_NP); |
68980084 | 1728 | |
1729 | /* set non-zero FWD ADDR | |
1730 | ||
1731 | draft-ietf-ospf-nssa-update-09.txt | |
1732 | ||
1733 | if the network between the NSSA AS boundary router and the | |
1734 | adjacent AS is advertised into OSPF as an internal OSPF route, | |
1735 | the forwarding address should be the next op address as is cu | |
1736 | currently done with type-5 LSAs. If the intervening network is | |
1737 | not adversited into OSPF as an internal OSPF route and the | |
1738 | type-7 LSA's P-bit is set a forwarding address should be | |
1739 | selected from one of the router's active OSPF inteface addresses | |
1740 | which belong to the NSSA. If no such addresses exist, then | |
1741 | no type-7 LSA's with the P-bit set should originate from this | |
1742 | router. */ | |
1743 | ||
d4a53d58 | 1744 | /* kevinm: not updating lsa anymore, just new */ |
1745 | extlsa = (struct as_external_lsa *)(new->data); | |
68980084 | 1746 | |
1747 | if (extlsa->e[0].fwd_addr.s_addr == 0) | |
1748 | extlsa->e[0].fwd_addr = ospf_get_nssa_ip(area); /* this NSSA area in ifp */ | |
718e3744 | 1749 | |
d748032f | 1750 | if (extlsa->e[0].fwd_addr.s_addr == 0) |
1751 | { | |
1752 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1753 | zlog_debug ("LSA[Type-7]: Could not build FWD-ADDR"); |
1fe6ed38 | 1754 | ospf_lsa_discard (new); |
d748032f | 1755 | return; |
1756 | } | |
f2c80652 | 1757 | } |
718e3744 | 1758 | |
68980084 | 1759 | /* install also as Type-7 */ |
d4a53d58 | 1760 | ospf_lsa_install (ospf, NULL, new); /* Remove Old, Lock New = 2 */ |
68980084 | 1761 | |
1762 | /* will send each copy, lock=2+n */ | |
d4a53d58 | 1763 | ospf_flood_through_as (ospf, NULL, new); /* all attached NSSA's, no AS/STUBs */ |
1764 | } | |
1765 | } | |
1766 | ||
4dadc291 | 1767 | static struct ospf_lsa * |
d4a53d58 | 1768 | ospf_lsa_translated_nssa_new (struct ospf *ospf, |
1769 | struct ospf_lsa *type7) | |
1770 | { | |
1771 | ||
1772 | struct ospf_lsa *new; | |
1773 | struct as_external_lsa *ext, *extnew; | |
1774 | struct external_info ei; | |
1775 | ||
1776 | ext = (struct as_external_lsa *)(type7->data); | |
1777 | ||
1778 | /* need external_info struct, fill in bare minimum */ | |
1779 | ei.p.family = AF_INET; | |
1780 | ei.p.prefix = type7->data->id; | |
1781 | ei.p.prefixlen = ip_masklen (ext->mask); | |
1782 | ei.type = ZEBRA_ROUTE_OSPF; | |
1783 | ei.nexthop = ext->header.adv_router; | |
1784 | ei.route_map_set.metric = -1; | |
1785 | ei.route_map_set.metric_type = -1; | |
1786 | ei.tag = 0; | |
1787 | ||
1788 | if ( (new = ospf_external_lsa_new (ospf, &ei, &type7->data->id)) == NULL) | |
1789 | { | |
1790 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1791 | zlog_debug ("ospf_nssa_translate_originate(): Could not originate " |
d4a53d58 | 1792 | "Translated Type-5 for %s", |
1793 | inet_ntoa (ei.p.prefix)); | |
1794 | return NULL; | |
1795 | } | |
1796 | ||
1797 | extnew = (struct as_external_lsa *)(new->data); | |
1798 | ||
1799 | /* copy over Type-7 data to new */ | |
1800 | extnew->e[0].tos = ext->e[0].tos; | |
1801 | extnew->e[0].route_tag = ext->e[0].route_tag; | |
1802 | extnew->e[0].fwd_addr.s_addr = ext->e[0].fwd_addr.s_addr; | |
1803 | new->data->ls_seqnum = type7->data->ls_seqnum; | |
1804 | ||
1805 | /* add translated flag, checksum and lock new lsa */ | |
1806 | SET_FLAG (new->flags, OSPF_LSA_LOCAL_XLT); /* Translated from 7 */ | |
d4a53d58 | 1807 | new = ospf_lsa_lock (new); |
1808 | ||
1809 | return new; | |
1810 | } | |
1811 | ||
d4a53d58 | 1812 | /* Originate Translated Type-5 for supplied Type-7 NSSA LSA */ |
1813 | struct ospf_lsa * | |
1814 | ospf_translated_nssa_originate (struct ospf *ospf, struct ospf_lsa *type7) | |
1815 | { | |
1816 | struct ospf_lsa *new; | |
1817 | struct as_external_lsa *extnew; | |
1818 | ||
1819 | /* we cant use ospf_external_lsa_originate() as we need to set | |
1820 | * the OSPF_LSA_LOCAL_XLT flag, must originate by hand | |
1821 | */ | |
1822 | ||
1823 | if ( (new = ospf_lsa_translated_nssa_new (ospf, type7)) == NULL) | |
1824 | { | |
1825 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1826 | zlog_debug ("ospf_translated_nssa_originate(): Could not translate " |
d4a53d58 | 1827 | "Type-7, Id %s, to Type-5", |
1828 | inet_ntoa (type7->data->id)); | |
1829 | return NULL; | |
1830 | } | |
1831 | ||
1832 | extnew = (struct as_external_lsa *)new; | |
1833 | ||
1834 | if (IS_DEBUG_OSPF_NSSA) | |
1835 | { | |
e588f21f | 1836 | zlog_debug ("ospf_translated_nssa_originate(): " |
d4a53d58 | 1837 | "translated Type 7, installed:"); |
1838 | ospf_lsa_header_dump (new->data); | |
e588f21f | 1839 | zlog_debug (" Network mask: %d",ip_masklen (extnew->mask)); |
1840 | zlog_debug (" Forward addr: %s", inet_ntoa (extnew->e[0].fwd_addr)); | |
d4a53d58 | 1841 | } |
1842 | ||
1843 | if ( (new = ospf_lsa_install (ospf, NULL, new)) == NULL) | |
1844 | { | |
8c9ed279 | 1845 | if (IS_DEBUG_OSPF_NSSA) |
e588f21f | 1846 | zlog_debug ("ospf_lsa_translated_nssa_originate(): " |
d4a53d58 | 1847 | "Could not install LSA " |
1848 | "id %s", inet_ntoa (type7->data->id)); | |
1849 | return NULL; | |
1850 | } | |
1851 | ||
1852 | ospf->lsa_originate_count++; | |
1853 | ospf_flood_through_as (ospf, NULL, new); | |
1854 | ||
1855 | return new; | |
1856 | } | |
1857 | ||
1858 | /* Refresh Translated from NSSA AS-external-LSA. */ | |
1859 | struct ospf_lsa * | |
1860 | ospf_translated_nssa_refresh (struct ospf *ospf, struct ospf_lsa *type7, | |
1861 | struct ospf_lsa *type5) | |
1862 | { | |
1863 | struct ospf_lsa *new = NULL; | |
1864 | ||
1865 | /* Sanity checks. */ | |
1866 | assert (type7 || type5); | |
ae128056 | 1867 | if (!(type7 || type5)) |
e54e6e57 | 1868 | return NULL; |
d4a53d58 | 1869 | if (type7) |
1870 | assert (type7->data); | |
1871 | if (type5) | |
1872 | assert (type5->data); | |
1873 | assert (ospf->anyNSSA); | |
1874 | ||
1875 | /* get required data according to what has been given */ | |
1876 | if (type7 && type5 == NULL) | |
1877 | { | |
1878 | /* find the translated Type-5 for this Type-7 */ | |
1879 | struct as_external_lsa *ext = (struct as_external_lsa *)(type7->data); | |
1880 | struct prefix_ipv4 p = | |
1881 | { | |
1882 | .prefix = type7->data->id, | |
1883 | .prefixlen = ip_masklen (ext->mask), | |
1884 | .family = AF_INET, | |
1885 | }; | |
1886 | ||
1887 | type5 = ospf_external_info_find_lsa (ospf, &p); | |
1888 | } | |
1889 | else if (type5 && type7 == NULL) | |
1890 | { | |
1891 | /* find the type-7 from which supplied type-5 was translated, | |
1892 | * ie find first type-7 with same LSA Id. | |
1893 | */ | |
1eb8ef25 | 1894 | struct listnode *ln, *lnn; |
d4a53d58 | 1895 | struct route_node *rn; |
1896 | struct ospf_lsa *lsa; | |
1897 | struct ospf_area *area; | |
1898 | ||
1eb8ef25 | 1899 | for (ALL_LIST_ELEMENTS (ospf->areas, ln, lnn, area)) |
d4a53d58 | 1900 | { |
1901 | if (area->external_routing != OSPF_AREA_NSSA | |
1902 | && !type7) | |
1903 | continue; | |
1904 | ||
1905 | LSDB_LOOP (NSSA_LSDB(area), rn, lsa) | |
1906 | { | |
1907 | if (lsa->data->id.s_addr == type5->data->id.s_addr) | |
1908 | { | |
1909 | type7 = lsa; | |
1910 | break; | |
1911 | } | |
1912 | } | |
1913 | } | |
68980084 | 1914 | } |
d4a53d58 | 1915 | |
1916 | /* do we have type7? */ | |
1917 | if (!type7) | |
1918 | { | |
1919 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1920 | zlog_debug ("ospf_translated_nssa_refresh(): no Type-7 found for " |
d4a53d58 | 1921 | "Type-5 LSA Id %s", |
e54e6e57 | 1922 | inet_ntoa (type5->data->id)); |
d4a53d58 | 1923 | return NULL; |
1924 | } | |
1925 | ||
1926 | /* do we have valid translated type5? */ | |
1927 | if (type5 == NULL || !CHECK_FLAG (type5->flags, OSPF_LSA_LOCAL_XLT) ) | |
1928 | { | |
1929 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1930 | zlog_debug ("ospf_translated_nssa_refresh(): No translated Type-5 " |
d4a53d58 | 1931 | "found for Type-7 with Id %s", |
1932 | inet_ntoa (type7->data->id)); | |
1933 | return NULL; | |
1934 | } | |
1935 | ||
1936 | /* Delete LSA from neighbor retransmit-list. */ | |
1937 | ospf_ls_retransmit_delete_nbr_as (ospf, type5); | |
1938 | ||
1939 | /* create new translated LSA */ | |
1940 | if ( (new = ospf_lsa_translated_nssa_new (ospf, type7)) == NULL) | |
1941 | { | |
1942 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1943 | zlog_debug ("ospf_translated_nssa_refresh(): Could not translate " |
d4a53d58 | 1944 | "Type-7 for %s to Type-5", |
1945 | inet_ntoa (type7->data->id)); | |
1946 | return NULL; | |
1947 | } | |
1948 | ||
1949 | if ( !(new = ospf_lsa_install (ospf, NULL, new)) ) | |
1950 | { | |
1951 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1952 | zlog_debug ("ospf_translated_nssa_refresh(): Could not install " |
d4a53d58 | 1953 | "translated LSA, Id %s", |
5db95bc2 | 1954 | inet_ntoa (type7->data->id)); |
d4a53d58 | 1955 | return NULL; |
1956 | } | |
1957 | ||
1958 | /* Flood LSA through area. */ | |
1959 | ospf_flood_through_as (ospf, NULL, new); | |
1960 | ||
1961 | return new; | |
718e3744 | 1962 | } |
718e3744 | 1963 | |
1964 | int | |
1965 | is_prefix_default (struct prefix_ipv4 *p) | |
1966 | { | |
1967 | struct prefix_ipv4 q; | |
1968 | ||
1969 | q.family = AF_INET; | |
1970 | q.prefix.s_addr = 0; | |
1971 | q.prefixlen = 0; | |
1972 | ||
1973 | return prefix_same ((struct prefix *) p, (struct prefix *) &q); | |
1974 | } | |
1975 | ||
1976 | /* Originate an AS-external-LSA, install and flood. */ | |
1977 | struct ospf_lsa * | |
68980084 | 1978 | ospf_external_lsa_originate (struct ospf *ospf, struct external_info *ei) |
718e3744 | 1979 | { |
1980 | struct ospf_lsa *new; | |
1981 | ||
1982 | /* Added for NSSA project.... | |
1983 | ||
1984 | External LSAs are originated in ASBRs as usual, but for NSSA systems. | |
1985 | there is the global Type-5 LSDB and a Type-7 LSDB installed for | |
1986 | every area. The Type-7's are flooded to every IR and every ABR; We | |
1987 | install the Type-5 LSDB so that the normal "refresh" code operates | |
1988 | as usual, and flag them as not used during ASE calculations. The | |
1989 | Type-7 LSDB is used for calculations. Each Type-7 has a Forwarding | |
1990 | Address of non-zero. | |
1991 | ||
1992 | If an ABR is the elected NSSA translator, following SPF and during | |
1993 | the ABR task it will translate all the scanned Type-7's, with P-bit | |
1994 | ON and not-self generated, and translate to Type-5's throughout the | |
1995 | non-NSSA/STUB AS. | |
1996 | ||
1997 | A difference in operation depends whether this ASBR is an ABR | |
1998 | or not. If not an ABR, the P-bit is ON, to indicate that any | |
1999 | elected NSSA-ABR can perform its translation. | |
2000 | ||
2001 | If an ABR, the P-bit is OFF; No ABR will perform translation and | |
2002 | this ASBR will flood the Type-5 LSA as usual. | |
2003 | ||
2004 | For the case where this ASBR is not an ABR, the ASE calculations | |
2005 | are based on the Type-5 LSDB; The Type-7 LSDB exists just to | |
2006 | demonstrate to the user that there are LSA's that belong to any | |
2007 | attached NSSA. | |
2008 | ||
2009 | Finally, it just so happens that when the ABR is translating every | |
2010 | Type-7 into Type-5, it installs it into the Type-5 LSDB as an | |
2011 | approved Type-5 (translated from Type-7); at the end of translation | |
2012 | if any Translated Type-5's remain unapproved, then they must be | |
2013 | flushed from the AS. | |
2014 | ||
2015 | */ | |
2016 | ||
2017 | /* Check the AS-external-LSA should be originated. */ | |
68980084 | 2018 | if (!ospf_redistribute_check (ospf, ei, NULL)) |
718e3744 | 2019 | return NULL; |
2020 | ||
2021 | /* Create new AS-external-LSA instance. */ | |
68980084 | 2022 | if ((new = ospf_external_lsa_new (ospf, ei, NULL)) == NULL) |
718e3744 | 2023 | { |
2024 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2025 | zlog_debug ("LSA[Type5:%s]: Could not originate AS-external-LSA", |
718e3744 | 2026 | inet_ntoa (ei->p.prefix)); |
2027 | return NULL; | |
2028 | } | |
2029 | ||
2030 | /* Install newly created LSA into Type-5 LSDB, lock = 1. */ | |
68980084 | 2031 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 2032 | |
2033 | /* Update LSA origination count. */ | |
68980084 | 2034 | ospf->lsa_originate_count++; |
718e3744 | 2035 | |
2036 | /* Flooding new LSA. only to AS (non-NSSA/STUB) */ | |
68980084 | 2037 | ospf_flood_through_as (ospf, NULL, new); |
718e3744 | 2038 | |
718e3744 | 2039 | /* If there is any attached NSSA, do special handling */ |
d4a53d58 | 2040 | if (ospf->anyNSSA && |
2041 | /* stay away from translated LSAs! */ | |
2042 | !(CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT))) | |
68980084 | 2043 | ospf_install_flood_nssa (ospf, new, ei); /* Install/Flood Type-7 to all NSSAs */ |
718e3744 | 2044 | |
2045 | /* Debug logging. */ | |
2046 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2047 | { | |
e588f21f | 2048 | zlog_debug ("LSA[Type%d:%s]: Originate AS-external-LSA %p", |
6c4f4e6e | 2049 | new->data->type, inet_ntoa (new->data->id), (void *)new); |
718e3744 | 2050 | ospf_lsa_header_dump (new->data); |
2051 | } | |
2052 | ||
2053 | return new; | |
2054 | } | |
2055 | ||
2056 | /* Originate AS-external-LSA from external info with initial flag. */ | |
2057 | int | |
68980084 | 2058 | ospf_external_lsa_originate_timer (struct thread *thread) |
718e3744 | 2059 | { |
68980084 | 2060 | struct ospf *ospf = THREAD_ARG (thread); |
718e3744 | 2061 | struct route_node *rn; |
2062 | struct external_info *ei; | |
2063 | struct route_table *rt; | |
68980084 | 2064 | int type = THREAD_VAL (thread); |
7c8ff89e DS |
2065 | struct list *ext_list; |
2066 | struct listnode *node; | |
2067 | struct ospf_external *ext; | |
718e3744 | 2068 | |
68980084 | 2069 | ospf->t_external_lsa = NULL; |
718e3744 | 2070 | |
7c8ff89e DS |
2071 | ext_list = om->external[type]; |
2072 | if (!ext_list) | |
2073 | return 0; | |
2074 | ||
2075 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) | |
2076 | /* Originate As-external-LSA from all type of distribute source. */ | |
2077 | if ((rt = ext->external_info)) | |
2078 | for (rn = route_top (rt); rn; rn = route_next (rn)) | |
2079 | if ((ei = rn->info) != NULL) | |
2080 | if (!is_prefix_default ((struct prefix_ipv4 *)&ei->p)) | |
2081 | if (!ospf_external_lsa_originate (ospf, ei)) | |
2082 | zlog_warn ("LSA: AS-external-LSA was not originated."); | |
2083 | ||
718e3744 | 2084 | return 0; |
2085 | } | |
2086 | ||
4dadc291 | 2087 | static struct external_info * |
020709f9 | 2088 | ospf_default_external_info (struct ospf *ospf) |
718e3744 | 2089 | { |
2090 | int type; | |
2091 | struct route_node *rn; | |
2092 | struct prefix_ipv4 p; | |
2093 | ||
2094 | p.family = AF_INET; | |
2095 | p.prefix.s_addr = 0; | |
2096 | p.prefixlen = 0; | |
2097 | ||
2098 | /* First, lookup redistributed default route. */ | |
2099 | for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) | |
7c8ff89e DS |
2100 | { |
2101 | struct list *ext_list; | |
2102 | struct listnode *node; | |
2103 | struct ospf_external *ext; | |
2104 | ||
2105 | if (type == ZEBRA_ROUTE_OSPF) | |
2106 | continue; | |
2107 | ||
2108 | ext_list = om->external[type]; | |
2109 | if (!ext_list) | |
2110 | continue; | |
2111 | ||
2112 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) | |
2113 | { | |
2114 | rn = route_node_lookup (ext->external_info, (struct prefix *) &p); | |
2115 | if (rn != NULL) | |
2116 | { | |
2117 | route_unlock_node (rn); | |
2118 | assert (rn->info); | |
2119 | if (ospf_redistribute_check (ospf, rn->info, NULL)) | |
2120 | return rn->info; | |
2121 | } | |
2122 | } | |
2123 | } | |
718e3744 | 2124 | |
2125 | return NULL; | |
2126 | } | |
2127 | ||
2128 | int | |
68980084 | 2129 | ospf_default_originate_timer (struct thread *thread) |
718e3744 | 2130 | { |
718e3744 | 2131 | struct prefix_ipv4 p; |
2132 | struct in_addr nexthop; | |
2133 | struct external_info *ei; | |
020709f9 | 2134 | struct ospf *ospf; |
718e3744 | 2135 | |
4021b60a | 2136 | ospf = THREAD_ARG (thread); |
718e3744 | 2137 | |
2138 | p.family = AF_INET; | |
2139 | p.prefix.s_addr = 0; | |
2140 | p.prefixlen = 0; | |
2141 | ||
4021b60a | 2142 | if (ospf->default_originate == DEFAULT_ORIGINATE_ALWAYS) |
718e3744 | 2143 | { |
2144 | /* If there is no default route via redistribute, | |
2145 | then originate AS-external-LSA with nexthop 0 (self). */ | |
2146 | nexthop.s_addr = 0; | |
7c8ff89e | 2147 | ospf_external_info_add (DEFAULT_ROUTE, 0, p, 0, nexthop, 0); |
718e3744 | 2148 | } |
2149 | ||
020709f9 | 2150 | if ((ei = ospf_default_external_info (ospf))) |
68980084 | 2151 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2152 | |
2153 | return 0; | |
2154 | } | |
2155 | ||
645878f1 | 2156 | /* Flush any NSSA LSAs for given prefix */ |
2157 | void | |
2158 | ospf_nssa_lsa_flush (struct ospf *ospf, struct prefix_ipv4 *p) | |
2159 | { | |
1eb8ef25 | 2160 | struct listnode *node, *nnode; |
645878f1 | 2161 | struct ospf_lsa *lsa; |
2162 | struct ospf_area *area; | |
2163 | ||
1eb8ef25 | 2164 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
645878f1 | 2165 | { |
1eb8ef25 | 2166 | if (area->external_routing == OSPF_AREA_NSSA) |
d748032f | 2167 | { |
2168 | if (!(lsa = ospf_lsa_lookup (area, OSPF_AS_NSSA_LSA, p->prefix, | |
2169 | ospf->router_id))) | |
2170 | { | |
2171 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2172 | zlog_debug ("LSA: There is no such AS-NSSA-LSA %s/%d in LSDB", |
d748032f | 2173 | inet_ntoa (p->prefix), p->prefixlen); |
2174 | continue; | |
2175 | } | |
2176 | ospf_ls_retransmit_delete_nbr_area (area, lsa); | |
2177 | if (!IS_LSA_MAXAGE (lsa)) | |
2178 | { | |
2179 | ospf_refresher_unregister_lsa (ospf, lsa); | |
2180 | ospf_lsa_flush_area (lsa, area); | |
2181 | } | |
2182 | } | |
645878f1 | 2183 | } |
2184 | } | |
645878f1 | 2185 | |
718e3744 | 2186 | /* Flush an AS-external-LSA from LSDB and routing domain. */ |
2187 | void | |
68980084 | 2188 | ospf_external_lsa_flush (struct ospf *ospf, |
2189 | u_char type, struct prefix_ipv4 *p, | |
b892f1dd | 2190 | ifindex_t ifindex /*, struct in_addr nexthop */) |
718e3744 | 2191 | { |
2192 | struct ospf_lsa *lsa; | |
2193 | ||
2194 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2195 | zlog_debug ("LSA: Flushing AS-external-LSA %s/%d", |
718e3744 | 2196 | inet_ntoa (p->prefix), p->prefixlen); |
2197 | ||
2198 | /* First lookup LSA from LSDB. */ | |
68980084 | 2199 | if (!(lsa = ospf_external_info_find_lsa (ospf, p))) |
718e3744 | 2200 | { |
2201 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2202 | zlog_debug ("LSA: There is no such AS-external-LSA %s/%d in LSDB", |
718e3744 | 2203 | inet_ntoa (p->prefix), p->prefixlen); |
2204 | return; | |
2205 | } | |
beebba75 | 2206 | |
d4a53d58 | 2207 | /* If LSA is selforiginated, not a translated LSA, and there is |
2208 | * NSSA area, flush Type-7 LSA's at first. | |
2209 | */ | |
2210 | if (IS_LSA_SELF(lsa) && (ospf->anyNSSA) | |
2211 | && !(CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT))) | |
d748032f | 2212 | ospf_nssa_lsa_flush (ospf, p); |
718e3744 | 2213 | |
2214 | /* Sweep LSA from Link State Retransmit List. */ | |
68980084 | 2215 | ospf_ls_retransmit_delete_nbr_as (ospf, lsa); |
718e3744 | 2216 | |
2217 | /* There must be no self-originated LSA in rtrs_external. */ | |
2218 | #if 0 | |
2219 | /* Remove External route from Zebra. */ | |
2220 | ospf_zebra_delete ((struct prefix_ipv4 *) p, &nexthop); | |
2221 | #endif | |
2222 | ||
2223 | if (!IS_LSA_MAXAGE (lsa)) | |
2224 | { | |
2225 | /* Unregister LSA from Refresh queue. */ | |
68980084 | 2226 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 2227 | |
2228 | /* Flush AS-external-LSA through AS. */ | |
68980084 | 2229 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 2230 | } |
2231 | ||
2232 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2233 | zlog_debug ("ospf_external_lsa_flush(): stop"); |
718e3744 | 2234 | } |
2235 | ||
2236 | void | |
68980084 | 2237 | ospf_external_lsa_refresh_default (struct ospf *ospf) |
718e3744 | 2238 | { |
2239 | struct prefix_ipv4 p; | |
2240 | struct external_info *ei; | |
2241 | struct ospf_lsa *lsa; | |
2242 | ||
2243 | p.family = AF_INET; | |
2244 | p.prefixlen = 0; | |
2245 | p.prefix.s_addr = 0; | |
2246 | ||
020709f9 | 2247 | ei = ospf_default_external_info (ospf); |
68980084 | 2248 | lsa = ospf_external_info_find_lsa (ospf, &p); |
718e3744 | 2249 | |
2250 | if (ei) | |
2251 | { | |
2252 | if (lsa) | |
2253 | { | |
2254 | if (IS_DEBUG_OSPF_EVENT) | |
6c4f4e6e DL |
2255 | zlog_debug ("LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p", |
2256 | (void *)lsa); | |
68980084 | 2257 | ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_FORCE); |
718e3744 | 2258 | } |
2259 | else | |
2260 | { | |
2261 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2262 | zlog_debug ("LSA[Type5:0.0.0.0]: Originate AS-external-LSA"); |
68980084 | 2263 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2264 | } |
2265 | } | |
2266 | else | |
2267 | { | |
2268 | if (lsa) | |
2269 | { | |
2270 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2271 | zlog_debug ("LSA[Type5:0.0.0.0]: Flush AS-external-LSA"); |
dfbd5176 | 2272 | ospf_refresher_unregister_lsa (ospf, lsa); |
68980084 | 2273 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 2274 | } |
2275 | } | |
2276 | } | |
2277 | ||
2278 | void | |
7c8ff89e DS |
2279 | ospf_external_lsa_refresh_type (struct ospf *ospf, u_char type, u_short instance, |
2280 | int force) | |
718e3744 | 2281 | { |
2282 | struct route_node *rn; | |
2283 | struct external_info *ei; | |
7c8ff89e | 2284 | struct ospf_external *ext; |
718e3744 | 2285 | |
2286 | if (type != DEFAULT_ROUTE) | |
7c8ff89e DS |
2287 | if ((ext = ospf_external_lookup(type, instance)) && |
2288 | EXTERNAL_INFO (ext)) | |
718e3744 | 2289 | /* Refresh each redistributed AS-external-LSAs. */ |
7c8ff89e | 2290 | for (rn = route_top (EXTERNAL_INFO (ext)); rn; rn = route_next (rn)) |
718e3744 | 2291 | if ((ei = rn->info)) |
2292 | if (!is_prefix_default (&ei->p)) | |
2293 | { | |
2294 | struct ospf_lsa *lsa; | |
2295 | ||
68980084 | 2296 | if ((lsa = ospf_external_info_find_lsa (ospf, &ei->p))) |
2297 | ospf_external_lsa_refresh (ospf, lsa, ei, force); | |
718e3744 | 2298 | else |
68980084 | 2299 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2300 | } |
2301 | } | |
2302 | ||
2303 | /* Refresh AS-external-LSA. */ | |
c363d386 | 2304 | struct ospf_lsa * |
68980084 | 2305 | ospf_external_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa, |
718e3744 | 2306 | struct external_info *ei, int force) |
2307 | { | |
2308 | struct ospf_lsa *new; | |
2309 | int changed; | |
2310 | ||
2311 | /* Check the AS-external-LSA should be originated. */ | |
68980084 | 2312 | if (!ospf_redistribute_check (ospf, ei, &changed)) |
718e3744 | 2313 | { |
d4a53d58 | 2314 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 2315 | zlog_debug ("LSA[Type%d:%s]: Could not be refreshed, " |
d4a53d58 | 2316 | "redist check fail", |
2317 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
68980084 | 2318 | ospf_external_lsa_flush (ospf, ei->type, &ei->p, |
5339cfdb | 2319 | ei->ifindex /*, ei->nexthop */); |
c363d386 | 2320 | return NULL; |
718e3744 | 2321 | } |
2322 | ||
2323 | if (!changed && !force) | |
d4a53d58 | 2324 | { |
2325 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 2326 | zlog_debug ("LSA[Type%d:%s]: Not refreshed, not changed/forced", |
d4a53d58 | 2327 | lsa->data->type, inet_ntoa (lsa->data->id)); |
c363d386 | 2328 | return NULL; |
d4a53d58 | 2329 | } |
718e3744 | 2330 | |
2331 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 2332 | ospf_ls_retransmit_delete_nbr_as (ospf, lsa); |
718e3744 | 2333 | |
2334 | /* Unregister AS-external-LSA from refresh-list. */ | |
68980084 | 2335 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 2336 | |
68980084 | 2337 | new = ospf_external_lsa_new (ospf, ei, &lsa->data->id); |
718e3744 | 2338 | |
2339 | if (new == NULL) | |
2340 | { | |
2341 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 2342 | zlog_debug ("LSA[Type%d:%s]: Could not be refreshed", lsa->data->type, |
718e3744 | 2343 | inet_ntoa (lsa->data->id)); |
c363d386 | 2344 | return NULL; |
718e3744 | 2345 | } |
2346 | ||
2347 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
2348 | ||
68980084 | 2349 | ospf_lsa_install (ospf, NULL, new); /* As type-5. */ |
718e3744 | 2350 | |
2351 | /* Flood LSA through AS. */ | |
68980084 | 2352 | ospf_flood_through_as (ospf, NULL, new); |
718e3744 | 2353 | |
718e3744 | 2354 | /* If any attached NSSA, install as Type-7, flood to all NSSA Areas */ |
d4a53d58 | 2355 | if (ospf->anyNSSA && !(CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT))) |
68980084 | 2356 | ospf_install_flood_nssa (ospf, new, ei); /* Install/Flood per new rules */ |
718e3744 | 2357 | |
d4a53d58 | 2358 | /* Register self-originated LSA to refresh queue. |
2359 | * Translated LSAs should not be registered, but refreshed upon | |
2360 | * refresh of the Type-7 | |
2361 | */ | |
2362 | if ( !CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT) ) | |
2363 | ospf_refresher_register_lsa (ospf, new); | |
718e3744 | 2364 | |
2365 | /* Debug logging. */ | |
2366 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2367 | { | |
e588f21f | 2368 | zlog_debug ("LSA[Type%d:%s]: AS-external-LSA refresh", |
d4a53d58 | 2369 | new->data->type, inet_ntoa (new->data->id)); |
718e3744 | 2370 | ospf_lsa_header_dump (new->data); |
2371 | } | |
2372 | ||
c363d386 | 2373 | return new; |
718e3744 | 2374 | } |
2375 | ||
6b0655a2 | 2376 | |
718e3744 | 2377 | /* LSA installation functions. */ |
2378 | ||
2379 | /* Install router-LSA to an area. */ | |
4dadc291 | 2380 | static struct ospf_lsa * |
c363d386 PJ |
2381 | ospf_router_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2382 | int rt_recalc) | |
718e3744 | 2383 | { |
2384 | struct ospf_area *area = new->area; | |
2385 | ||
2386 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2387 | The entire routing table must be recalculated, starting with | |
2388 | the shortest path calculations for each area (not just the | |
2389 | area whose link-state database has changed). | |
2390 | */ | |
718e3744 | 2391 | |
5996e0df | 2392 | if (IS_LSA_SELF (new)) |
718e3744 | 2393 | { |
5996e0df JT |
2394 | |
2395 | /* Only install LSA if it is originated/refreshed by us. | |
2396 | * If LSA was received by flooding, the RECEIVED flag is set so do | |
2397 | * not link the LSA */ | |
2398 | if (CHECK_FLAG (new->flags, OSPF_LSA_RECEIVED)) | |
2399 | return new; /* ignore stale LSA */ | |
2400 | ||
718e3744 | 2401 | /* Set self-originated router-LSA. */ |
1fe6ed38 | 2402 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 2403 | area->router_lsa_self = ospf_lsa_lock (new); |
2404 | ||
c363d386 | 2405 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2406 | } |
5996e0df | 2407 | if (rt_recalc) |
d3a9c768 | 2408 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_ROUTER_LSA_INSTALL); |
718e3744 | 2409 | return new; |
2410 | } | |
2411 | ||
2412 | #define OSPF_INTERFACE_TIMER_ON(T,F,V) \ | |
2413 | if (!(T)) \ | |
2414 | (T) = thread_add_timer (master, (F), oi, (V)) | |
2415 | ||
2416 | /* Install network-LSA to an area. */ | |
4dadc291 | 2417 | static struct ospf_lsa * |
68980084 | 2418 | ospf_network_lsa_install (struct ospf *ospf, |
2419 | struct ospf_interface *oi, | |
718e3744 | 2420 | struct ospf_lsa *new, |
2421 | int rt_recalc) | |
2422 | { | |
2423 | ||
2424 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2425 | The entire routing table must be recalculated, starting with | |
2426 | the shortest path calculations for each area (not just the | |
2427 | area whose link-state database has changed). | |
2428 | */ | |
5996e0df | 2429 | if (IS_LSA_SELF (new)) |
718e3744 | 2430 | { |
5996e0df JT |
2431 | /* We supposed that when LSA is originated by us, we pass the int |
2432 | for which it was originated. If LSA was received by flooding, | |
2433 | the RECEIVED flag is set, so we do not link the LSA to the int. */ | |
2434 | if (CHECK_FLAG (new->flags, OSPF_LSA_RECEIVED)) | |
2435 | return new; /* ignore stale LSA */ | |
2436 | ||
1fe6ed38 | 2437 | ospf_lsa_unlock (&oi->network_lsa_self); |
718e3744 | 2438 | oi->network_lsa_self = ospf_lsa_lock (new); |
c363d386 | 2439 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2440 | } |
5996e0df | 2441 | if (rt_recalc) |
d3a9c768 | 2442 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_NETWORK_LSA_INSTALL); |
718e3744 | 2443 | |
2444 | return new; | |
2445 | } | |
2446 | ||
2447 | /* Install summary-LSA to an area. */ | |
4dadc291 | 2448 | static struct ospf_lsa * |
68980084 | 2449 | ospf_summary_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2450 | int rt_recalc) | |
718e3744 | 2451 | { |
718e3744 | 2452 | if (rt_recalc && !IS_LSA_SELF (new)) |
2453 | { | |
2454 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2455 | The best route to the destination described by the summary- | |
2456 | LSA must be recalculated (see Section 16.5). If this | |
2457 | destination is an AS boundary router, it may also be | |
2458 | necessary to re-examine all the AS-external-LSAs. | |
2459 | */ | |
2460 | ||
2461 | #if 0 | |
2462 | /* This doesn't exist yet... */ | |
2463 | ospf_summary_incremental_update(new); */ | |
2464 | #else /* #if 0 */ | |
d3a9c768 | 2465 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_SUMMARY_LSA_INSTALL); |
718e3744 | 2466 | #endif /* #if 0 */ |
2467 | ||
718e3744 | 2468 | } |
2469 | ||
2470 | if (IS_LSA_SELF (new)) | |
68980084 | 2471 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2472 | |
2473 | return new; | |
2474 | } | |
2475 | ||
2476 | /* Install ASBR-summary-LSA to an area. */ | |
4dadc291 | 2477 | static struct ospf_lsa * |
68980084 | 2478 | ospf_summary_asbr_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2479 | int rt_recalc) | |
718e3744 | 2480 | { |
2481 | if (rt_recalc && !IS_LSA_SELF (new)) | |
2482 | { | |
2483 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2484 | The best route to the destination described by the summary- | |
2485 | LSA must be recalculated (see Section 16.5). If this | |
2486 | destination is an AS boundary router, it may also be | |
2487 | necessary to re-examine all the AS-external-LSAs. | |
2488 | */ | |
2489 | #if 0 | |
2490 | /* These don't exist yet... */ | |
2491 | ospf_summary_incremental_update(new); | |
2492 | /* Isn't this done by the above call? | |
2493 | - RFC 2328 Section 16.5 implies it should be */ | |
2494 | /* ospf_ase_calculate_schedule(); */ | |
2495 | #else /* #if 0 */ | |
d3a9c768 | 2496 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL); |
718e3744 | 2497 | #endif /* #if 0 */ |
2498 | } | |
2499 | ||
2500 | /* register LSA to refresh-list. */ | |
2501 | if (IS_LSA_SELF (new)) | |
68980084 | 2502 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2503 | |
2504 | return new; | |
2505 | } | |
2506 | ||
2507 | /* Install AS-external-LSA. */ | |
4dadc291 | 2508 | static struct ospf_lsa * |
68980084 | 2509 | ospf_external_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2510 | int rt_recalc) | |
718e3744 | 2511 | { |
68980084 | 2512 | ospf_ase_register_external_lsa (new, ospf); |
718e3744 | 2513 | /* If LSA is not self-originated, calculate an external route. */ |
2514 | if (rt_recalc) | |
2515 | { | |
2516 | /* RFC 2328 Section 13.2 AS-external-LSAs | |
2517 | The best route to the destination described by the AS- | |
2518 | external-LSA must be recalculated (see Section 16.6). | |
2519 | */ | |
2520 | ||
2521 | if (!IS_LSA_SELF (new)) | |
d4a53d58 | 2522 | ospf_ase_incremental_update (ospf, new); |
718e3744 | 2523 | } |
2524 | ||
d4a53d58 | 2525 | if (new->data->type == OSPF_AS_NSSA_LSA) |
2526 | { | |
2527 | /* There is no point to register selforiginate Type-7 LSA for | |
2528 | * refreshing. We rely on refreshing Type-5 LSA's | |
2529 | */ | |
2530 | if (IS_LSA_SELF (new)) | |
2531 | return new; | |
2532 | else | |
2533 | { | |
2534 | /* Try refresh type-5 translated LSA for this LSA, if one exists. | |
2535 | * New translations will be taken care of by the abr_task. | |
2536 | */ | |
2537 | ospf_translated_nssa_refresh (ospf, new, NULL); | |
2538 | } | |
2539 | } | |
d748032f | 2540 | |
d4a53d58 | 2541 | /* Register self-originated LSA to refresh queue. |
8fc0f64b | 2542 | * Leave Translated LSAs alone if NSSA is enabled |
d4a53d58 | 2543 | */ |
beebba75 | 2544 | if (IS_LSA_SELF (new) && !CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT ) ) |
68980084 | 2545 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2546 | |
2547 | return new; | |
2548 | } | |
2549 | ||
2550 | void | |
68980084 | 2551 | ospf_discard_from_db (struct ospf *ospf, |
2552 | struct ospf_lsdb *lsdb, struct ospf_lsa *lsa) | |
718e3744 | 2553 | { |
2554 | struct ospf_lsa *old; | |
2555 | ||
ac904dec PJ |
2556 | if (!lsdb) |
2557 | { | |
2558 | zlog_warn ("%s: Called with NULL lsdb!", __func__); | |
2559 | if (!lsa) | |
2560 | zlog_warn ("%s: and NULL LSA!", __func__); | |
2561 | else | |
2562 | zlog_warn ("LSA[Type%d:%s]: not associated with LSDB!", | |
2563 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
2564 | return; | |
2565 | } | |
2566 | ||
718e3744 | 2567 | old = ospf_lsdb_lookup (lsdb, lsa); |
2568 | ||
2569 | if (!old) | |
2570 | return; | |
2571 | ||
2572 | if (old->refresh_list >= 0) | |
68980084 | 2573 | ospf_refresher_unregister_lsa (ospf, old); |
718e3744 | 2574 | |
2575 | switch (old->data->type) | |
2576 | { | |
2577 | case OSPF_AS_EXTERNAL_LSA: | |
69310a67 | 2578 | ospf_ase_unregister_external_lsa (old, ospf); |
2579 | ospf_ls_retransmit_delete_nbr_as (ospf, old); | |
2580 | break; | |
718e3744 | 2581 | case OSPF_OPAQUE_AS_LSA: |
68980084 | 2582 | ospf_ls_retransmit_delete_nbr_as (ospf, old); |
718e3744 | 2583 | break; |
d748032f | 2584 | case OSPF_AS_NSSA_LSA: |
2585 | ospf_ls_retransmit_delete_nbr_area (old->area, old); | |
2586 | ospf_ase_unregister_external_lsa (old, ospf); | |
beebba75 | 2587 | break; |
718e3744 | 2588 | default: |
68980084 | 2589 | ospf_ls_retransmit_delete_nbr_area (old->area, old); |
718e3744 | 2590 | break; |
2591 | } | |
2592 | ||
68980084 | 2593 | ospf_lsa_maxage_delete (ospf, old); |
718e3744 | 2594 | ospf_lsa_discard (old); |
2595 | } | |
2596 | ||
718e3744 | 2597 | struct ospf_lsa * |
68980084 | 2598 | ospf_lsa_install (struct ospf *ospf, struct ospf_interface *oi, |
2599 | struct ospf_lsa *lsa) | |
718e3744 | 2600 | { |
2601 | struct ospf_lsa *new = NULL; | |
2602 | struct ospf_lsa *old = NULL; | |
2603 | struct ospf_lsdb *lsdb = NULL; | |
2604 | int rt_recalc; | |
2605 | ||
2606 | /* Set LSDB. */ | |
2607 | switch (lsa->data->type) | |
2608 | { | |
f2c80652 | 2609 | /* kevinm */ |
2610 | case OSPF_AS_NSSA_LSA: | |
2611 | if (lsa->area) | |
2612 | lsdb = lsa->area->lsdb; | |
2613 | else | |
68980084 | 2614 | lsdb = ospf->lsdb; |
f2c80652 | 2615 | break; |
718e3744 | 2616 | case OSPF_AS_EXTERNAL_LSA: |
718e3744 | 2617 | case OSPF_OPAQUE_AS_LSA: |
68980084 | 2618 | lsdb = ospf->lsdb; |
718e3744 | 2619 | break; |
2620 | default: | |
2621 | lsdb = lsa->area->lsdb; | |
2622 | break; | |
2623 | } | |
2624 | ||
718e3744 | 2625 | assert (lsdb); |
2626 | ||
2627 | /* RFC 2328 13.2. Installing LSAs in the database | |
2628 | ||
2629 | Installing a new LSA in the database, either as the result of | |
2630 | flooding or a newly self-originated LSA, may cause the OSPF | |
2631 | routing table structure to be recalculated. The contents of the | |
2632 | new LSA should be compared to the old instance, if present. If | |
2633 | there is no difference, there is no need to recalculate the | |
2634 | routing table. When comparing an LSA to its previous instance, | |
2635 | the following are all considered to be differences in contents: | |
2636 | ||
2637 | o The LSA's Options field has changed. | |
2638 | ||
2639 | o One of the LSA instances has LS age set to MaxAge, and | |
2640 | the other does not. | |
2641 | ||
2642 | o The length field in the LSA header has changed. | |
2643 | ||
2644 | o The body of the LSA (i.e., anything outside the 20-byte | |
2645 | LSA header) has changed. Note that this excludes changes | |
2646 | in LS Sequence Number and LS Checksum. | |
2647 | ||
2648 | */ | |
2649 | /* Look up old LSA and determine if any SPF calculation or incremental | |
2650 | update is needed */ | |
2651 | old = ospf_lsdb_lookup (lsdb, lsa); | |
2652 | ||
2653 | /* Do comparision and record if recalc needed. */ | |
2654 | rt_recalc = 0; | |
2655 | if ( old == NULL || ospf_lsa_different(old, lsa)) | |
2656 | rt_recalc = 1; | |
2657 | ||
7ddf1d6e | 2658 | /* |
2659 | Sequence number check (Section 14.1 of rfc 2328) | |
2660 | "Premature aging is used when it is time for a self-originated | |
2661 | LSA's sequence number field to wrap. At this point, the current | |
2662 | LSA instance (having LS sequence number MaxSequenceNumber) must | |
2663 | be prematurely aged and flushed from the routing domain before a | |
2664 | new instance with sequence number equal to InitialSequenceNumber | |
2665 | can be originated. " | |
2666 | */ | |
2667 | ||
c2b478d7 | 2668 | if (ntohl(lsa->data->ls_seqnum) - 1 == OSPF_MAX_SEQUENCE_NUMBER) |
7ddf1d6e | 2669 | { |
2670 | if (ospf_lsa_is_self_originated(ospf, lsa)) | |
2671 | { | |
0c2be26c | 2672 | lsa->data->ls_seqnum = htonl(OSPF_MAX_SEQUENCE_NUMBER); |
2673 | ||
2674 | if (!IS_LSA_MAXAGE(lsa)) | |
7ddf1d6e | 2675 | lsa->flags |= OSPF_LSA_PREMATURE_AGE; |
2676 | lsa->data->ls_age = htons (OSPF_LSA_MAXAGE); | |
2677 | ||
2678 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
2679 | { | |
e588f21f | 2680 | zlog_debug ("ospf_lsa_install() Premature Aging " |
c363d386 | 2681 | "lsa 0x%p, seqnum 0x%x", |
6c4f4e6e | 2682 | (void *)lsa, ntohl(lsa->data->ls_seqnum)); |
7ddf1d6e | 2683 | ospf_lsa_header_dump (lsa->data); |
2684 | } | |
2685 | } | |
2686 | else | |
2687 | { | |
2688 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2689 | { | |
e588f21f | 2690 | zlog_debug ("ospf_lsa_install() got an lsa with seq 0x80000000 " |
7ddf1d6e | 2691 | "that was not self originated. Ignoring\n"); |
2692 | ospf_lsa_header_dump (lsa->data); | |
2693 | } | |
2694 | return old; | |
2695 | } | |
2696 | } | |
2697 | ||
718e3744 | 2698 | /* discard old LSA from LSDB */ |
2699 | if (old != NULL) | |
68980084 | 2700 | ospf_discard_from_db (ospf, lsdb, lsa); |
718e3744 | 2701 | |
718e3744 | 2702 | /* Calculate Checksum if self-originated?. */ |
2703 | if (IS_LSA_SELF (lsa)) | |
2704 | ospf_lsa_checksum (lsa->data); | |
2705 | ||
fe71a97d | 2706 | /* Insert LSA to LSDB. */ |
2707 | ospf_lsdb_add (lsdb, lsa); | |
2708 | lsa->lsdb = lsdb; | |
2709 | ||
718e3744 | 2710 | /* Do LSA specific installation process. */ |
2711 | switch (lsa->data->type) | |
2712 | { | |
2713 | case OSPF_ROUTER_LSA: | |
68980084 | 2714 | new = ospf_router_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2715 | break; |
2716 | case OSPF_NETWORK_LSA: | |
2717 | assert (oi); | |
68980084 | 2718 | new = ospf_network_lsa_install (ospf, oi, lsa, rt_recalc); |
718e3744 | 2719 | break; |
2720 | case OSPF_SUMMARY_LSA: | |
68980084 | 2721 | new = ospf_summary_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2722 | break; |
2723 | case OSPF_ASBR_SUMMARY_LSA: | |
68980084 | 2724 | new = ospf_summary_asbr_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2725 | break; |
2726 | case OSPF_AS_EXTERNAL_LSA: | |
68980084 | 2727 | new = ospf_external_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2728 | break; |
718e3744 | 2729 | case OSPF_OPAQUE_LINK_LSA: |
09e4efdc | 2730 | if (IS_LSA_SELF (lsa)) |
68980084 | 2731 | lsa->oi = oi; /* Specify outgoing ospf-interface for this LSA. */ |
09e4efdc | 2732 | else |
0798cee3 AC |
2733 | { |
2734 | /* Incoming "oi" for this LSA has set at LSUpd reception. */ | |
2735 | } | |
09e4efdc | 2736 | /* Fallthrough */ |
718e3744 | 2737 | case OSPF_OPAQUE_AREA_LSA: |
2738 | case OSPF_OPAQUE_AS_LSA: | |
2739 | new = ospf_opaque_lsa_install (lsa, rt_recalc); | |
2740 | break; | |
d4a53d58 | 2741 | case OSPF_AS_NSSA_LSA: |
68980084 | 2742 | new = ospf_external_lsa_install (ospf, lsa, rt_recalc); |
d4a53d58 | 2743 | default: /* type-6,8,9....nothing special */ |
718e3744 | 2744 | break; |
2745 | } | |
2746 | ||
2747 | if (new == NULL) | |
2748 | return new; /* Installation failed, cannot proceed further -- endo. */ | |
2749 | ||
2750 | /* Debug logs. */ | |
2751 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) | |
2752 | { | |
2753 | char area_str[INET_ADDRSTRLEN]; | |
2754 | ||
2755 | switch (lsa->data->type) | |
2756 | { | |
2757 | case OSPF_AS_EXTERNAL_LSA: | |
718e3744 | 2758 | case OSPF_OPAQUE_AS_LSA: |
beebba75 | 2759 | case OSPF_AS_NSSA_LSA: |
e588f21f | 2760 | zlog_debug ("LSA[%s]: Install %s", |
718e3744 | 2761 | dump_lsa_key (new), |
2762 | LOOKUP (ospf_lsa_type_msg, new->data->type)); | |
2763 | break; | |
2764 | default: | |
2765 | strcpy (area_str, inet_ntoa (new->area->area_id)); | |
e588f21f | 2766 | zlog_debug ("LSA[%s]: Install %s to Area %s", |
718e3744 | 2767 | dump_lsa_key (new), |
2768 | LOOKUP (ospf_lsa_type_msg, new->data->type), area_str); | |
2769 | break; | |
2770 | } | |
2771 | } | |
2772 | ||
7ddf1d6e | 2773 | /* |
2774 | If received LSA' ls_age is MaxAge, or lsa is being prematurely aged | |
2775 | (it's getting flushed out of the area), set LSA on MaxAge LSA list. | |
2776 | */ | |
e0630cb4 | 2777 | if (IS_LSA_MAXAGE (new)) |
718e3744 | 2778 | { |
7ddf1d6e | 2779 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) |
e588f21f | 2780 | zlog_debug ("LSA[Type%d:%s]: Install LSA 0x%p, MaxAge", |
6c4f4e6e DL |
2781 | new->data->type, |
2782 | inet_ntoa (new->data->id), | |
2783 | (void *)lsa); | |
e0630cb4 | 2784 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 2785 | } |
2786 | ||
2787 | return new; | |
2788 | } | |
2789 | ||
6b0655a2 | 2790 | |
4c14b7f6 | 2791 | int |
68980084 | 2792 | ospf_check_nbr_status (struct ospf *ospf) |
718e3744 | 2793 | { |
1eb8ef25 | 2794 | struct listnode *node, *nnode; |
2795 | struct ospf_interface *oi; | |
2796 | ||
2797 | for (ALL_LIST_ELEMENTS (ospf->oiflist, node, nnode, oi)) | |
718e3744 | 2798 | { |
718e3744 | 2799 | struct route_node *rn; |
2800 | struct ospf_neighbor *nbr; | |
2801 | ||
2802 | if (ospf_if_is_enable (oi)) | |
2803 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
2804 | if ((nbr = rn->info) != NULL) | |
2805 | if (nbr->state == NSM_Exchange || nbr->state == NSM_Loading) | |
2806 | { | |
2807 | route_unlock_node (rn); | |
2808 | return 0; | |
2809 | } | |
2810 | } | |
2811 | ||
2812 | return 1; | |
2813 | } | |
2814 | ||
6b0655a2 | 2815 | |
718e3744 | 2816 | |
4dadc291 | 2817 | static int |
718e3744 | 2818 | ospf_maxage_lsa_remover (struct thread *thread) |
2819 | { | |
68980084 | 2820 | struct ospf *ospf = THREAD_ARG (thread); |
1eb8ef25 | 2821 | struct ospf_lsa *lsa; |
91e6a0e5 | 2822 | struct route_node *rn; |
718e3744 | 2823 | int reschedule = 0; |
2824 | ||
68980084 | 2825 | ospf->t_maxage = NULL; |
718e3744 | 2826 | |
2827 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2828 | zlog_debug ("LSA[MaxAge]: remover Start"); |
718e3744 | 2829 | |
68980084 | 2830 | reschedule = !ospf_check_nbr_status (ospf); |
718e3744 | 2831 | |
2832 | if (!reschedule) | |
91e6a0e5 | 2833 | for (rn = route_top(ospf->maxage_lsa); rn; rn = route_next(rn)) |
718e3744 | 2834 | { |
91e6a0e5 DD |
2835 | if ((lsa = rn->info) == NULL) |
2836 | { | |
2837 | continue; | |
2838 | } | |
2839 | ||
4de8bf00 CF |
2840 | /* There is at least one neighbor from which we still await an ack |
2841 | * for that LSA, so we are not allowed to remove it from our lsdb yet | |
2842 | * as per RFC 2328 section 14 para 4 a) */ | |
718e3744 | 2843 | if (lsa->retransmit_counter > 0) |
2844 | { | |
2845 | reschedule = 1; | |
2846 | continue; | |
2847 | } | |
94b6bfd2 PJ |
2848 | |
2849 | /* TODO: maybe convert this function to a work-queue */ | |
2850 | if (thread_should_yield (thread)) | |
4de8bf00 CF |
2851 | { |
2852 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, 0); | |
e387dfd1 | 2853 | route_unlock_node(rn); /* route_top/route_next */ |
4de8bf00 CF |
2854 | return 0; |
2855 | } | |
94b6bfd2 | 2856 | |
718e3744 | 2857 | /* Remove LSA from the LSDB */ |
ce3cdcfb | 2858 | if (IS_LSA_SELF (lsa)) |
718e3744 | 2859 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) |
ad8d4802 | 2860 | zlog_debug ("LSA[Type%d:%s]: LSA 0x%lx is self-originated: ", |
7ddf1d6e | 2861 | lsa->data->type, inet_ntoa (lsa->data->id), (u_long)lsa); |
718e3744 | 2862 | |
2863 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2864 | zlog_debug ("LSA[Type%d:%s]: MaxAge LSA removed from list", |
718e3744 | 2865 | lsa->data->type, inet_ntoa (lsa->data->id)); |
2866 | ||
c363d386 | 2867 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_PREMATURE_AGE)) |
7ddf1d6e | 2868 | { |
2869 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
6c4f4e6e | 2870 | zlog_debug ("originating new lsa for lsa 0x%p\n", (void *)lsa); |
c363d386 | 2871 | ospf_lsa_refresh (ospf, lsa); |
7ddf1d6e | 2872 | } |
2873 | ||
718e3744 | 2874 | /* Remove from lsdb. */ |
ac904dec PJ |
2875 | if (lsa->lsdb) |
2876 | { | |
2877 | ospf_discard_from_db (ospf, lsa->lsdb, lsa); | |
2878 | ospf_lsdb_delete (lsa->lsdb, lsa); | |
2879 | } | |
2880 | else | |
2881 | zlog_warn ("%s: LSA[Type%d:%s]: No associated LSDB!", __func__, | |
2882 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
718e3744 | 2883 | } |
2884 | ||
2885 | /* A MaxAge LSA must be removed immediately from the router's link | |
2886 | state database as soon as both a) it is no longer contained on any | |
2887 | neighbor Link state retransmission lists and b) none of the router's | |
2888 | neighbors are in states Exchange or Loading. */ | |
2889 | if (reschedule) | |
02d942c9 PJ |
2890 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, |
2891 | ospf->maxage_delay); | |
718e3744 | 2892 | |
2893 | return 0; | |
2894 | } | |
2895 | ||
718e3744 | 2896 | void |
68980084 | 2897 | ospf_lsa_maxage_delete (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 2898 | { |
91e6a0e5 | 2899 | struct route_node *rn; |
b4b359a2 | 2900 | struct prefix_ptr lsa_prefix; |
718e3744 | 2901 | |
b4b359a2 PM |
2902 | lsa_prefix.family = 0; |
2903 | lsa_prefix.prefixlen = sizeof(lsa_prefix.prefix) * CHAR_BIT; | |
2904 | lsa_prefix.prefix = (uintptr_t) lsa; | |
91e6a0e5 DD |
2905 | |
2906 | if ((rn = route_node_lookup(ospf->maxage_lsa, | |
2907 | (struct prefix *)&lsa_prefix))) | |
718e3744 | 2908 | { |
91e6a0e5 DD |
2909 | if (rn->info == lsa) |
2910 | { | |
2911 | UNSET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); | |
2912 | ospf_lsa_unlock (&lsa); /* maxage_lsa */ | |
2913 | rn->info = NULL; | |
8afee5c1 | 2914 | route_unlock_node (rn); /* unlock node because lsa is deleted */ |
91e6a0e5 | 2915 | } |
8afee5c1 | 2916 | route_unlock_node (rn); /* route_node_lookup */ |
718e3744 | 2917 | } |
2918 | } | |
2919 | ||
02d942c9 PJ |
2920 | /* Add LSA onto the MaxAge list, and schedule for removal. |
2921 | * This does *not* lead to the LSA being flooded, that must be taken | |
2922 | * care of elsewhere, see, e.g., ospf_lsa_flush* (which are callers of this | |
2923 | * function). | |
2924 | */ | |
718e3744 | 2925 | void |
68980084 | 2926 | ospf_lsa_maxage (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 2927 | { |
b4b359a2 | 2928 | struct prefix_ptr lsa_prefix; |
91e6a0e5 DD |
2929 | struct route_node *rn; |
2930 | ||
718e3744 | 2931 | /* When we saw a MaxAge LSA flooded to us, we put it on the list |
2932 | and schedule the MaxAge LSA remover. */ | |
3106a032 | 2933 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE)) |
718e3744 | 2934 | { |
2935 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2936 | zlog_debug ("LSA[Type%d:%s]: %p already exists on MaxAge LSA list", |
6c4f4e6e | 2937 | lsa->data->type, inet_ntoa (lsa->data->id), (void *)lsa); |
718e3744 | 2938 | return; |
2939 | } | |
2940 | ||
b4b359a2 PM |
2941 | lsa_prefix.family = 0; |
2942 | lsa_prefix.prefixlen = sizeof(lsa_prefix.prefix) * CHAR_BIT; | |
2943 | lsa_prefix.prefix = (uintptr_t) lsa; | |
2944 | ||
91e6a0e5 DD |
2945 | if ((rn = route_node_get (ospf->maxage_lsa, |
2946 | (struct prefix *)&lsa_prefix)) != NULL) | |
2947 | { | |
2948 | if (rn->info != NULL) | |
2949 | { | |
b4b359a2 PM |
2950 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) |
2951 | zlog_debug ("LSA[%s]: found LSA (%p) in table for LSA %p %d", | |
6c4f4e6e DL |
2952 | dump_lsa_key (lsa), rn->info, (void *)lsa, |
2953 | lsa_prefix.prefixlen); | |
91e6a0e5 DD |
2954 | route_unlock_node (rn); |
2955 | } | |
2956 | else | |
2957 | { | |
2958 | rn->info = ospf_lsa_lock(lsa); | |
2959 | SET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); | |
2960 | } | |
2961 | } | |
2962 | else | |
2963 | { | |
2964 | zlog_err("Unable to allocate memory for maxage lsa\n"); | |
2965 | assert(0); | |
2966 | } | |
718e3744 | 2967 | |
2968 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2969 | zlog_debug ("LSA[%s]: MaxAge LSA remover scheduled.", dump_lsa_key (lsa)); |
718e3744 | 2970 | |
02d942c9 PJ |
2971 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, |
2972 | ospf->maxage_delay); | |
718e3744 | 2973 | } |
2974 | ||
4dadc291 | 2975 | static int |
68980084 | 2976 | ospf_lsa_maxage_walker_remover (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 2977 | { |
718e3744 | 2978 | /* Stay away from any Local Translated Type-7 LSAs */ |
2979 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
2980 | return 0; | |
718e3744 | 2981 | |
2982 | if (IS_LSA_MAXAGE (lsa)) | |
2983 | /* Self-originated LSAs should NOT time-out instead, | |
2984 | they're flushed and submitted to the max_age list explicitly. */ | |
68980084 | 2985 | if (!ospf_lsa_is_self_originated (ospf, lsa)) |
718e3744 | 2986 | { |
2987 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2988 | zlog_debug("LSA[%s]: is MaxAge", dump_lsa_key (lsa)); |
718e3744 | 2989 | |
2990 | switch (lsa->data->type) | |
2991 | { | |
37163d6d | 2992 | case OSPF_OPAQUE_LINK_LSA: |
2993 | case OSPF_OPAQUE_AREA_LSA: | |
718e3744 | 2994 | case OSPF_OPAQUE_AS_LSA: |
09e4efdc | 2995 | /* |
2996 | * As a general rule, whenever network topology has changed | |
2997 | * (due to an LSA removal in this case), routing recalculation | |
2998 | * should be triggered. However, this is not true for opaque | |
2999 | * LSAs. Even if an opaque LSA instance is going to be removed | |
3000 | * from the routing domain, it does not mean a change in network | |
3001 | * topology, and thus, routing recalculation is not needed here. | |
3002 | */ | |
3003 | break; | |
09e4efdc | 3004 | case OSPF_AS_EXTERNAL_LSA: |
beebba75 | 3005 | case OSPF_AS_NSSA_LSA: |
68980084 | 3006 | ospf_ase_incremental_update (ospf, lsa); |
3007 | break; | |
718e3744 | 3008 | default: |
d3a9c768 | 3009 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_MAXAGE); |
68980084 | 3010 | break; |
718e3744 | 3011 | } |
68980084 | 3012 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 3013 | } |
3014 | ||
c363d386 PJ |
3015 | if (IS_LSA_MAXAGE (lsa) && !ospf_lsa_is_self_originated (ospf, lsa)) |
3016 | if (LS_AGE (lsa) > OSPF_LSA_MAXAGE + 30) | |
3017 | printf ("Eek! Shouldn't happen!\n"); | |
3018 | ||
718e3744 | 3019 | return 0; |
3020 | } | |
3021 | ||
3022 | /* Periodical check of MaxAge LSA. */ | |
3023 | int | |
68980084 | 3024 | ospf_lsa_maxage_walker (struct thread *thread) |
718e3744 | 3025 | { |
68980084 | 3026 | struct ospf *ospf = THREAD_ARG (thread); |
3027 | struct route_node *rn; | |
3028 | struct ospf_lsa *lsa; | |
1eb8ef25 | 3029 | struct ospf_area *area; |
3030 | struct listnode *node, *nnode; | |
718e3744 | 3031 | |
68980084 | 3032 | ospf->t_maxage_walker = NULL; |
718e3744 | 3033 | |
1eb8ef25 | 3034 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 3035 | { |
68980084 | 3036 | LSDB_LOOP (ROUTER_LSDB (area), rn, lsa) |
3037 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3038 | LSDB_LOOP (NETWORK_LSDB (area), rn, lsa) | |
3039 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3040 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) | |
3041 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3042 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
3043 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
68980084 | 3044 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) |
3045 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3046 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) | |
3047 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
4fb949e3 | 3048 | LSDB_LOOP (NSSA_LSDB (area), rn, lsa) |
3049 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3050 | } |
3051 | ||
4fb949e3 | 3052 | /* for AS-external-LSAs. */ |
68980084 | 3053 | if (ospf->lsdb) |
3054 | { | |
3055 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) | |
3056 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
68980084 | 3057 | LSDB_LOOP (OPAQUE_AS_LSDB (ospf), rn, lsa) |
3058 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
68980084 | 3059 | } |
718e3744 | 3060 | |
68980084 | 3061 | OSPF_TIMER_ON (ospf->t_maxage_walker, ospf_lsa_maxage_walker, |
3062 | OSPF_LSA_MAXAGE_CHECK_INTERVAL); | |
718e3744 | 3063 | return 0; |
3064 | } | |
3065 | ||
68980084 | 3066 | struct ospf_lsa * |
3067 | ospf_lsa_lookup_by_prefix (struct ospf_lsdb *lsdb, u_char type, | |
3068 | struct prefix_ipv4 *p, struct in_addr router_id) | |
718e3744 | 3069 | { |
68980084 | 3070 | struct ospf_lsa *lsa; |
3071 | struct in_addr mask, id; | |
3072 | struct lsa_header_mask | |
3073 | { | |
3074 | struct lsa_header header; | |
3075 | struct in_addr mask; | |
3076 | } *hmask; | |
718e3744 | 3077 | |
68980084 | 3078 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, p->prefix, router_id); |
3079 | if (lsa == NULL) | |
3080 | return NULL; | |
718e3744 | 3081 | |
68980084 | 3082 | masklen2ip (p->prefixlen, &mask); |
718e3744 | 3083 | |
68980084 | 3084 | hmask = (struct lsa_header_mask *) lsa->data; |
718e3744 | 3085 | |
68980084 | 3086 | if (mask.s_addr != hmask->mask.s_addr) |
3087 | { | |
3088 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
3089 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, id, router_id); | |
3090 | if (!lsa) | |
3091 | return NULL; | |
3092 | } | |
718e3744 | 3093 | |
68980084 | 3094 | return lsa; |
718e3744 | 3095 | } |
3096 | ||
3097 | struct ospf_lsa * | |
3098 | ospf_lsa_lookup (struct ospf_area *area, u_int32_t type, | |
3099 | struct in_addr id, struct in_addr adv_router) | |
3100 | { | |
e05fba43 | 3101 | struct ospf *ospf = ospf_lookup(); |
3102 | assert(ospf); | |
3103 | ||
718e3744 | 3104 | switch (type) |
3105 | { | |
3106 | case OSPF_ROUTER_LSA: | |
3107 | case OSPF_NETWORK_LSA: | |
3108 | case OSPF_SUMMARY_LSA: | |
3109 | case OSPF_ASBR_SUMMARY_LSA: | |
718e3744 | 3110 | case OSPF_AS_NSSA_LSA: |
718e3744 | 3111 | case OSPF_OPAQUE_LINK_LSA: |
3112 | case OSPF_OPAQUE_AREA_LSA: | |
718e3744 | 3113 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, adv_router); |
718e3744 | 3114 | case OSPF_AS_EXTERNAL_LSA: |
718e3744 | 3115 | case OSPF_OPAQUE_AS_LSA: |
e05fba43 | 3116 | return ospf_lsdb_lookup_by_id (ospf->lsdb, type, id, adv_router); |
718e3744 | 3117 | default: |
3118 | break; | |
3119 | } | |
3120 | ||
3121 | return NULL; | |
3122 | } | |
3123 | ||
3124 | struct ospf_lsa * | |
3125 | ospf_lsa_lookup_by_id (struct ospf_area *area, u_int32_t type, | |
3126 | struct in_addr id) | |
3127 | { | |
3128 | struct ospf_lsa *lsa; | |
3129 | struct route_node *rn; | |
3130 | ||
3131 | switch (type) | |
3132 | { | |
3133 | case OSPF_ROUTER_LSA: | |
3134 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, id); | |
718e3744 | 3135 | case OSPF_NETWORK_LSA: |
3136 | for (rn = route_top (NETWORK_LSDB (area)); rn; rn = route_next (rn)) | |
3137 | if ((lsa = rn->info)) | |
3138 | if (IPV4_ADDR_SAME (&lsa->data->id, &id)) | |
3139 | { | |
3140 | route_unlock_node (rn); | |
3141 | return lsa; | |
3142 | } | |
3143 | break; | |
3144 | case OSPF_SUMMARY_LSA: | |
3145 | case OSPF_ASBR_SUMMARY_LSA: | |
3146 | /* Currently not used. */ | |
3147 | assert (1); | |
3148 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, id); | |
718e3744 | 3149 | case OSPF_AS_EXTERNAL_LSA: |
d4a53d58 | 3150 | case OSPF_AS_NSSA_LSA: |
718e3744 | 3151 | case OSPF_OPAQUE_LINK_LSA: |
3152 | case OSPF_OPAQUE_AREA_LSA: | |
3153 | case OSPF_OPAQUE_AS_LSA: | |
3154 | /* Currently not used. */ | |
3155 | break; | |
718e3744 | 3156 | default: |
3157 | break; | |
3158 | } | |
3159 | ||
3160 | return NULL; | |
3161 | } | |
3162 | ||
3163 | struct ospf_lsa * | |
3164 | ospf_lsa_lookup_by_header (struct ospf_area *area, struct lsa_header *lsah) | |
3165 | { | |
3166 | struct ospf_lsa *match; | |
3167 | ||
718e3744 | 3168 | /* |
3169 | * Strictly speaking, the LSA-ID field for Opaque-LSAs (type-9/10/11) | |
3170 | * is redefined to have two subfields; opaque-type and opaque-id. | |
3171 | * However, it is harmless to treat the two sub fields together, as if | |
3172 | * they two were forming a unique LSA-ID. | |
3173 | */ | |
718e3744 | 3174 | |
3175 | match = ospf_lsa_lookup (area, lsah->type, lsah->id, lsah->adv_router); | |
3176 | ||
3177 | if (match == NULL) | |
3178 | if (IS_DEBUG_OSPF (lsa, LSA) == OSPF_DEBUG_LSA) | |
e588f21f | 3179 | zlog_debug ("LSA[Type%d:%s]: Lookup by header, NO MATCH", |
718e3744 | 3180 | lsah->type, inet_ntoa (lsah->id)); |
3181 | ||
3182 | return match; | |
3183 | } | |
3184 | ||
3185 | /* return +n, l1 is more recent. | |
3186 | return -n, l2 is more recent. | |
3187 | return 0, l1 and l2 is identical. */ | |
3188 | int | |
3189 | ospf_lsa_more_recent (struct ospf_lsa *l1, struct ospf_lsa *l2) | |
3190 | { | |
3191 | int r; | |
3192 | int x, y; | |
3193 | ||
3194 | if (l1 == NULL && l2 == NULL) | |
3195 | return 0; | |
3196 | if (l1 == NULL) | |
3197 | return -1; | |
3198 | if (l2 == NULL) | |
3199 | return 1; | |
3200 | ||
3201 | /* compare LS sequence number. */ | |
3202 | x = (int) ntohl (l1->data->ls_seqnum); | |
3203 | y = (int) ntohl (l2->data->ls_seqnum); | |
3204 | if (x > y) | |
3205 | return 1; | |
3206 | if (x < y) | |
3207 | return -1; | |
3208 | ||
3209 | /* compare LS checksum. */ | |
3210 | r = ntohs (l1->data->checksum) - ntohs (l2->data->checksum); | |
3211 | if (r) | |
3212 | return r; | |
3213 | ||
3214 | /* compare LS age. */ | |
3215 | if (IS_LSA_MAXAGE (l1) && !IS_LSA_MAXAGE (l2)) | |
3216 | return 1; | |
3217 | else if (!IS_LSA_MAXAGE (l1) && IS_LSA_MAXAGE (l2)) | |
3218 | return -1; | |
3219 | ||
3220 | /* compare LS age with MaxAgeDiff. */ | |
3221 | if (LS_AGE (l1) - LS_AGE (l2) > OSPF_LSA_MAXAGE_DIFF) | |
3222 | return -1; | |
3223 | else if (LS_AGE (l2) - LS_AGE (l1) > OSPF_LSA_MAXAGE_DIFF) | |
3224 | return 1; | |
3225 | ||
3226 | /* LSAs are identical. */ | |
3227 | return 0; | |
3228 | } | |
3229 | ||
3230 | /* If two LSAs are different, return 1, otherwise return 0. */ | |
3231 | int | |
3232 | ospf_lsa_different (struct ospf_lsa *l1, struct ospf_lsa *l2) | |
3233 | { | |
3234 | char *p1, *p2; | |
3235 | assert (l1); | |
3236 | assert (l2); | |
3237 | assert (l1->data); | |
3238 | assert (l2->data); | |
3239 | ||
3240 | if (l1->data->options != l2->data->options) | |
3241 | return 1; | |
3242 | ||
3243 | if (IS_LSA_MAXAGE (l1) && !IS_LSA_MAXAGE (l2)) | |
3244 | return 1; | |
3245 | ||
3246 | if (IS_LSA_MAXAGE (l2) && !IS_LSA_MAXAGE (l1)) | |
3247 | return 1; | |
3248 | ||
3249 | if (l1->data->length != l2->data->length) | |
3250 | return 1; | |
3251 | ||
3252 | if (l1->data->length == 0) | |
3253 | return 1; | |
3254 | ||
5996e0df JT |
3255 | if (CHECK_FLAG ((l1->flags ^ l2->flags), OSPF_LSA_RECEIVED)) |
3256 | return 1; /* May be a stale LSA in the LSBD */ | |
3257 | ||
d1825830 | 3258 | assert ( ntohs(l1->data->length) > OSPF_LSA_HEADER_SIZE); |
718e3744 | 3259 | |
3260 | p1 = (char *) l1->data; | |
3261 | p2 = (char *) l2->data; | |
3262 | ||
3263 | if (memcmp (p1 + OSPF_LSA_HEADER_SIZE, p2 + OSPF_LSA_HEADER_SIZE, | |
3264 | ntohs( l1->data->length ) - OSPF_LSA_HEADER_SIZE) != 0) | |
3265 | return 1; | |
3266 | ||
3267 | return 0; | |
3268 | } | |
3269 | ||
3270 | #ifdef ORIGINAL_CODING | |
3271 | void | |
3272 | ospf_lsa_flush_self_originated (struct ospf_neighbor *nbr, | |
3273 | struct ospf_lsa *self, | |
3274 | struct ospf_lsa *new) | |
3275 | { | |
3276 | u_int32_t seqnum; | |
3277 | ||
3278 | /* Adjust LS Sequence Number. */ | |
3279 | seqnum = ntohl (new->data->ls_seqnum) + 1; | |
3280 | self->data->ls_seqnum = htonl (seqnum); | |
3281 | ||
3282 | /* Recalculate LSA checksum. */ | |
3283 | ospf_lsa_checksum (self->data); | |
3284 | ||
3285 | /* Reflooding LSA. */ | |
3286 | /* RFC2328 Section 13.3 | |
3287 | On non-broadcast networks, separate Link State Update | |
3288 | packets must be sent, as unicasts, to each adjacent neighbor | |
3289 | (i.e., those in state Exchange or greater). The destination | |
3290 | IP addresses for these packets are the neighbors' IP | |
3291 | addresses. */ | |
3292 | if (nbr->oi->type == OSPF_IFTYPE_NBMA) | |
3293 | { | |
3294 | struct route_node *rn; | |
3295 | struct ospf_neighbor *onbr; | |
3296 | ||
3297 | for (rn = route_top (nbr->oi->nbrs); rn; rn = route_next (rn)) | |
3298 | if ((onbr = rn->info) != NULL) | |
3299 | if (onbr != nbr->oi->nbr_self && onbr->status >= NSM_Exchange) | |
3300 | ospf_ls_upd_send_lsa (onbr, self, OSPF_SEND_PACKET_DIRECT); | |
3301 | } | |
3302 | else | |
3303 | ospf_ls_upd_send_lsa (nbr, self, OSPF_SEND_PACKET_INDIRECT); | |
3304 | ||
3305 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3306 | zlog_debug ("LSA[Type%d:%s]: Flush self-originated LSA", |
718e3744 | 3307 | self->data->type, inet_ntoa (self->data->id)); |
3308 | } | |
3309 | #else /* ORIGINAL_CODING */ | |
2c19a6ec | 3310 | int |
68980084 | 3311 | ospf_lsa_flush_schedule (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3312 | { |
3313 | if (lsa == NULL || !IS_LSA_SELF (lsa)) | |
3314 | return 0; | |
3315 | ||
3316 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 3317 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", lsa->data->type, inet_ntoa (lsa->data->id)); |
718e3744 | 3318 | |
3319 | /* Force given lsa's age to MaxAge. */ | |
3320 | lsa->data->ls_age = htons (OSPF_LSA_MAXAGE); | |
3321 | ||
3322 | switch (lsa->data->type) | |
3323 | { | |
02d942c9 | 3324 | /* Opaque wants to be notified of flushes */ |
718e3744 | 3325 | case OSPF_OPAQUE_LINK_LSA: |
3326 | case OSPF_OPAQUE_AREA_LSA: | |
3327 | case OSPF_OPAQUE_AS_LSA: | |
3328 | ospf_opaque_lsa_refresh (lsa); | |
3329 | break; | |
718e3744 | 3330 | default: |
dfbd5176 | 3331 | ospf_refresher_unregister_lsa (ospf, lsa); |
02d942c9 | 3332 | ospf_lsa_flush (ospf, lsa); |
718e3744 | 3333 | break; |
3334 | } | |
3335 | ||
3336 | return 0; | |
3337 | } | |
3338 | ||
3339 | void | |
68980084 | 3340 | ospf_flush_self_originated_lsas_now (struct ospf *ospf) |
718e3744 | 3341 | { |
1eb8ef25 | 3342 | struct listnode *node, *nnode; |
3343 | struct listnode *node2, *nnode2; | |
718e3744 | 3344 | struct ospf_area *area; |
3345 | struct ospf_interface *oi; | |
3346 | struct ospf_lsa *lsa; | |
68980084 | 3347 | struct route_node *rn; |
718e3744 | 3348 | int need_to_flush_ase = 0; |
3349 | ||
1eb8ef25 | 3350 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 3351 | { |
718e3744 | 3352 | if ((lsa = area->router_lsa_self) != NULL) |
3353 | { | |
3354 | if (IS_DEBUG_OSPF_EVENT) | |
dfbd5176 PJ |
3355 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", |
3356 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
3357 | ||
3358 | ospf_refresher_unregister_lsa (ospf, lsa); | |
718e3744 | 3359 | ospf_lsa_flush_area (lsa, area); |
1fe6ed38 | 3360 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 3361 | area->router_lsa_self = NULL; |
718e3744 | 3362 | } |
3363 | ||
1eb8ef25 | 3364 | for (ALL_LIST_ELEMENTS (area->oiflist, node2, nnode2, oi)) |
718e3744 | 3365 | { |
718e3744 | 3366 | if ((lsa = oi->network_lsa_self) != NULL |
1eb8ef25 | 3367 | && oi->state == ISM_DR |
3368 | && oi->full_nbrs > 0) | |
718e3744 | 3369 | { |
3370 | if (IS_DEBUG_OSPF_EVENT) | |
dfbd5176 PJ |
3371 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", |
3372 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
3373 | ||
3374 | ospf_refresher_unregister_lsa (ospf, oi->network_lsa_self); | |
718e3744 | 3375 | ospf_lsa_flush_area (oi->network_lsa_self, area); |
1fe6ed38 | 3376 | ospf_lsa_unlock (&oi->network_lsa_self); |
718e3744 | 3377 | oi->network_lsa_self = NULL; |
718e3744 | 3378 | } |
3379 | ||
3380 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK | |
3381 | && area->external_routing == OSPF_AREA_DEFAULT) | |
3382 | need_to_flush_ase = 1; | |
3383 | } | |
3384 | ||
68980084 | 3385 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) |
3386 | ospf_lsa_flush_schedule (ospf, lsa); | |
3387 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
3388 | ospf_lsa_flush_schedule (ospf, lsa); | |
68980084 | 3389 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) |
3390 | ospf_lsa_flush_schedule (ospf, lsa); | |
3391 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) | |
3392 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3393 | } |
3394 | ||
3395 | if (need_to_flush_ase) | |
3396 | { | |
68980084 | 3397 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) |
3398 | ospf_lsa_flush_schedule (ospf, lsa); | |
68980084 | 3399 | LSDB_LOOP (OPAQUE_AS_LSDB (ospf), rn, lsa) |
3400 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3401 | } |
3402 | ||
3403 | /* | |
3404 | * Make sure that the MaxAge LSA remover is executed immediately, | |
3405 | * without conflicting to other threads. | |
3406 | */ | |
68980084 | 3407 | if (ospf->t_maxage != NULL) |
718e3744 | 3408 | { |
68980084 | 3409 | OSPF_TIMER_OFF (ospf->t_maxage); |
3410 | thread_execute (master, ospf_maxage_lsa_remover, ospf, 0); | |
718e3744 | 3411 | } |
3412 | ||
3413 | return; | |
3414 | } | |
3415 | #endif /* ORIGINAL_CODING */ | |
3416 | ||
3417 | /* If there is self-originated LSA, then return 1, otherwise return 0. */ | |
3418 | /* An interface-independent version of ospf_lsa_is_self_originated */ | |
3419 | int | |
68980084 | 3420 | ospf_lsa_is_self_originated (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3421 | { |
52dc7ee6 | 3422 | struct listnode *node; |
1eb8ef25 | 3423 | struct ospf_interface *oi; |
718e3744 | 3424 | |
3425 | /* This LSA is already checked. */ | |
3426 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF_CHECKED)) | |
ce3cdcfb | 3427 | return IS_LSA_SELF (lsa); |
718e3744 | 3428 | |
3429 | /* Make sure LSA is self-checked. */ | |
3430 | SET_FLAG (lsa->flags, OSPF_LSA_SELF_CHECKED); | |
3431 | ||
3432 | /* AdvRouter and Router ID is the same. */ | |
68980084 | 3433 | if (IPV4_ADDR_SAME (&lsa->data->adv_router, &ospf->router_id)) |
718e3744 | 3434 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); |
3435 | ||
3436 | /* LSA is router-LSA. */ | |
3437 | else if (lsa->data->type == OSPF_ROUTER_LSA && | |
68980084 | 3438 | IPV4_ADDR_SAME (&lsa->data->id, &ospf->router_id)) |
718e3744 | 3439 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); |
3440 | ||
3441 | /* LSA is network-LSA. Compare Link ID with all interfaces. */ | |
3442 | else if (lsa->data->type == OSPF_NETWORK_LSA) | |
1eb8ef25 | 3443 | for (ALL_LIST_ELEMENTS_RO (ospf->oiflist, node, oi)) |
718e3744 | 3444 | { |
718e3744 | 3445 | /* Ignore virtual link. */ |
3446 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
3447 | if (oi->address->family == AF_INET) | |
3448 | if (IPV4_ADDR_SAME (&lsa->data->id, &oi->address->u.prefix4)) | |
3449 | { | |
3450 | /* to make it easier later */ | |
3451 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); | |
ce3cdcfb | 3452 | return IS_LSA_SELF (lsa); |
718e3744 | 3453 | } |
3454 | } | |
3455 | ||
ce3cdcfb | 3456 | return IS_LSA_SELF (lsa); |
718e3744 | 3457 | } |
3458 | ||
3459 | /* Get unique Link State ID. */ | |
3460 | struct in_addr | |
68980084 | 3461 | ospf_lsa_unique_id (struct ospf *ospf, |
3462 | struct ospf_lsdb *lsdb, u_char type, struct prefix_ipv4 *p) | |
718e3744 | 3463 | { |
3464 | struct ospf_lsa *lsa; | |
3465 | struct in_addr mask, id; | |
3466 | ||
3467 | id = p->prefix; | |
3468 | ||
3469 | /* Check existence of LSA instance. */ | |
68980084 | 3470 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, id, ospf->router_id); |
718e3744 | 3471 | if (lsa) |
3472 | { | |
3473 | struct as_external_lsa *al = (struct as_external_lsa *) lsa->data; | |
3474 | if (ip_masklen (al->mask) == p->prefixlen) | |
3475 | { | |
3476 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3477 | zlog_debug ("ospf_lsa_unique_id(): " |
718e3744 | 3478 | "Can't get Link State ID for %s/%d", |
3479 | inet_ntoa (p->prefix), p->prefixlen); | |
3480 | /* id.s_addr = 0; */ | |
3481 | id.s_addr = 0xffffffff; | |
3482 | return id; | |
3483 | } | |
3484 | /* Masklen differs, then apply wildcard mask to Link State ID. */ | |
3485 | else | |
3486 | { | |
3487 | masklen2ip (p->prefixlen, &mask); | |
3488 | ||
3489 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
68980084 | 3490 | lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, type, |
3491 | id, ospf->router_id); | |
718e3744 | 3492 | if (lsa) |
3493 | { | |
3494 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3495 | zlog_debug ("ospf_lsa_unique_id(): " |
718e3744 | 3496 | "Can't get Link State ID for %s/%d", |
3497 | inet_ntoa (p->prefix), p->prefixlen); | |
3498 | /* id.s_addr = 0; */ | |
3499 | id.s_addr = 0xffffffff; | |
3500 | return id; | |
3501 | } | |
3502 | } | |
3503 | } | |
3504 | ||
3505 | return id; | |
3506 | } | |
3507 | ||
6b0655a2 | 3508 | |
70461d79 PJ |
3509 | #define LSA_ACTION_FLOOD_AREA 1 |
3510 | #define LSA_ACTION_FLUSH_AREA 2 | |
718e3744 | 3511 | |
3512 | struct lsa_action | |
3513 | { | |
3514 | u_char action; | |
3515 | struct ospf_area *area; | |
718e3744 | 3516 | struct ospf_lsa *lsa; |
3517 | }; | |
3518 | ||
4dadc291 | 3519 | static int |
718e3744 | 3520 | ospf_lsa_action (struct thread *t) |
3521 | { | |
3522 | struct lsa_action *data; | |
3523 | ||
3524 | data = THREAD_ARG (t); | |
3525 | ||
3526 | if (IS_DEBUG_OSPF (lsa, LSA) == OSPF_DEBUG_LSA) | |
e588f21f | 3527 | zlog_debug ("LSA[Action]: Performing scheduled LSA action: %d", |
718e3744 | 3528 | data->action); |
3529 | ||
3530 | switch (data->action) | |
3531 | { | |
718e3744 | 3532 | case LSA_ACTION_FLOOD_AREA: |
3533 | ospf_flood_through_area (data->area, NULL, data->lsa); | |
3534 | break; | |
718e3744 | 3535 | case LSA_ACTION_FLUSH_AREA: |
3536 | ospf_lsa_flush_area (data->lsa, data->area); | |
3537 | break; | |
718e3744 | 3538 | } |
3539 | ||
1fe6ed38 | 3540 | ospf_lsa_unlock (&data->lsa); /* Message */ |
718e3744 | 3541 | XFREE (MTYPE_OSPF_MESSAGE, data); |
3542 | return 0; | |
3543 | } | |
3544 | ||
3545 | void | |
3546 | ospf_schedule_lsa_flood_area (struct ospf_area *area, struct ospf_lsa *lsa) | |
3547 | { | |
3548 | struct lsa_action *data; | |
3549 | ||
393deb9b | 3550 | data = XCALLOC (MTYPE_OSPF_MESSAGE, sizeof (struct lsa_action)); |
718e3744 | 3551 | data->action = LSA_ACTION_FLOOD_AREA; |
3552 | data->area = area; | |
1fe6ed38 | 3553 | data->lsa = ospf_lsa_lock (lsa); /* Message / Flood area */ |
718e3744 | 3554 | |
ffa2c898 | 3555 | thread_add_event(master, ospf_lsa_action, data, 0, NULL); |
718e3744 | 3556 | } |
3557 | ||
3558 | void | |
3559 | ospf_schedule_lsa_flush_area (struct ospf_area *area, struct ospf_lsa *lsa) | |
3560 | { | |
3561 | struct lsa_action *data; | |
3562 | ||
393deb9b | 3563 | data = XCALLOC (MTYPE_OSPF_MESSAGE, sizeof (struct lsa_action)); |
718e3744 | 3564 | data->action = LSA_ACTION_FLUSH_AREA; |
3565 | data->area = area; | |
1fe6ed38 | 3566 | data->lsa = ospf_lsa_lock (lsa); /* Message / Flush area */ |
718e3744 | 3567 | |
ffa2c898 | 3568 | thread_add_event(master, ospf_lsa_action, data, 0, NULL); |
718e3744 | 3569 | } |
3570 | ||
6b0655a2 | 3571 | |
718e3744 | 3572 | /* LSA Refreshment functions. */ |
c363d386 | 3573 | struct ospf_lsa * |
68980084 | 3574 | ospf_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3575 | { |
3576 | struct external_info *ei; | |
c363d386 | 3577 | struct ospf_lsa *new = NULL; |
718e3744 | 3578 | assert (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF)); |
ce3cdcfb | 3579 | assert (IS_LSA_SELF (lsa)); |
6634974d | 3580 | assert (lsa->lock > 0); |
718e3744 | 3581 | |
3582 | switch (lsa->data->type) | |
3583 | { | |
3584 | /* Router and Network LSAs are processed differently. */ | |
3585 | case OSPF_ROUTER_LSA: | |
c363d386 PJ |
3586 | new = ospf_router_lsa_refresh (lsa); |
3587 | break; | |
718e3744 | 3588 | case OSPF_NETWORK_LSA: |
c363d386 | 3589 | new = ospf_network_lsa_refresh (lsa); |
718e3744 | 3590 | break; |
3591 | case OSPF_SUMMARY_LSA: | |
c363d386 | 3592 | new = ospf_summary_lsa_refresh (ospf, lsa); |
718e3744 | 3593 | break; |
3594 | case OSPF_ASBR_SUMMARY_LSA: | |
c363d386 | 3595 | new = ospf_summary_asbr_lsa_refresh (ospf, lsa); |
718e3744 | 3596 | break; |
3597 | case OSPF_AS_EXTERNAL_LSA: | |
d4a53d58 | 3598 | /* Translated from NSSA Type-5s are refreshed when |
3599 | * from refresh of Type-7 - do not refresh these directly. | |
3600 | */ | |
3601 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
3602 | break; | |
718e3744 | 3603 | ei = ospf_external_info_check (lsa); |
3604 | if (ei) | |
c363d386 | 3605 | new = ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_FORCE); |
718e3744 | 3606 | else |
d4a53d58 | 3607 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 3608 | break; |
718e3744 | 3609 | case OSPF_OPAQUE_LINK_LSA: |
3610 | case OSPF_OPAQUE_AREA_LSA: | |
3611 | case OSPF_OPAQUE_AS_LSA: | |
c363d386 | 3612 | new = ospf_opaque_lsa_refresh (lsa); |
718e3744 | 3613 | break; |
3614 | default: | |
3615 | break; | |
718e3744 | 3616 | } |
c363d386 | 3617 | return new; |
718e3744 | 3618 | } |
3619 | ||
3620 | void | |
68980084 | 3621 | ospf_refresher_register_lsa (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3622 | { |
3623 | u_int16_t index, current_index; | |
3624 | ||
6634974d | 3625 | assert (lsa->lock > 0); |
ce3cdcfb | 3626 | assert (IS_LSA_SELF (lsa)); |
718e3744 | 3627 | |
3628 | if (lsa->refresh_list < 0) | |
3629 | { | |
3630 | int delay; | |
535c84b1 DW |
3631 | int min_delay = OSPF_LS_REFRESH_TIME - (2 * OSPF_LS_REFRESH_JITTER); |
3632 | int max_delay = OSPF_LS_REFRESH_TIME - OSPF_LS_REFRESH_JITTER; | |
718e3744 | 3633 | |
535c84b1 DW |
3634 | /* We want to refresh the LSA within OSPF_LS_REFRESH_TIME which is |
3635 | * 1800s. Use jitter so that we send the LSA sometime between 1680s | |
3636 | * and 1740s. | |
3637 | */ | |
3638 | delay = (random() % (max_delay - min_delay)) + min_delay; | |
718e3744 | 3639 | |
cf672a86 DL |
3640 | current_index = ospf->lsa_refresh_queue.index + (monotime(NULL) |
3641 | - ospf->lsa_refresher_started)/OSPF_LSA_REFRESHER_GRANULARITY; | |
718e3744 | 3642 | |
3643 | index = (current_index + delay/OSPF_LSA_REFRESHER_GRANULARITY) | |
c363d386 | 3644 | % (OSPF_LSA_REFRESHER_SLOTS); |
718e3744 | 3645 | |
3646 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
535c84b1 DW |
3647 | zlog_debug ("LSA[Refresh:Type%d:%s]: age %d, added to index %d", |
3648 | lsa->data->type, inet_ntoa (lsa->data->id), LS_AGE (lsa), index); | |
3649 | ||
68980084 | 3650 | if (!ospf->lsa_refresh_queue.qs[index]) |
3651 | ospf->lsa_refresh_queue.qs[index] = list_new (); | |
535c84b1 | 3652 | |
1fe6ed38 PJ |
3653 | listnode_add (ospf->lsa_refresh_queue.qs[index], |
3654 | ospf_lsa_lock (lsa)); /* lsa_refresh_queue */ | |
718e3744 | 3655 | lsa->refresh_list = index; |
535c84b1 | 3656 | |
f2c80652 | 3657 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) |
6c4f4e6e DL |
3658 | zlog_debug ("LSA[Refresh:Type%d:%s]: ospf_refresher_register_lsa(): " |
3659 | "setting refresh_list on lsa %p (slod %d)", | |
3660 | lsa->data->type, inet_ntoa (lsa->data->id), (void *)lsa, index); | |
718e3744 | 3661 | } |
3662 | } | |
3663 | ||
3664 | void | |
68980084 | 3665 | ospf_refresher_unregister_lsa (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3666 | { |
6634974d | 3667 | assert (lsa->lock > 0); |
ce3cdcfb | 3668 | assert (IS_LSA_SELF (lsa)); |
718e3744 | 3669 | if (lsa->refresh_list >= 0) |
3670 | { | |
52dc7ee6 | 3671 | struct list *refresh_list = ospf->lsa_refresh_queue.qs[lsa->refresh_list]; |
718e3744 | 3672 | listnode_delete (refresh_list, lsa); |
3673 | if (!listcount (refresh_list)) | |
3674 | { | |
3675 | list_free (refresh_list); | |
68980084 | 3676 | ospf->lsa_refresh_queue.qs[lsa->refresh_list] = NULL; |
718e3744 | 3677 | } |
1fe6ed38 | 3678 | ospf_lsa_unlock (&lsa); /* lsa_refresh_queue */ |
718e3744 | 3679 | lsa->refresh_list = -1; |
3680 | } | |
3681 | } | |
3682 | ||
3683 | int | |
3684 | ospf_lsa_refresh_walker (struct thread *t) | |
3685 | { | |
52dc7ee6 | 3686 | struct list *refresh_list; |
1eb8ef25 | 3687 | struct listnode *node, *nnode; |
68980084 | 3688 | struct ospf *ospf = THREAD_ARG (t); |
1eb8ef25 | 3689 | struct ospf_lsa *lsa; |
718e3744 | 3690 | int i; |
52dc7ee6 | 3691 | struct list *lsa_to_refresh = list_new (); |
718e3744 | 3692 | |
3693 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
535c84b1 | 3694 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): start"); |
718e3744 | 3695 | |
3696 | ||
68980084 | 3697 | i = ospf->lsa_refresh_queue.index; |
718e3744 | 3698 | |
9dbc7972 | 3699 | /* Note: if clock has jumped backwards, then time change could be negative, |
3700 | so we are careful to cast the expression to unsigned before taking | |
3701 | modulus. */ | |
68980084 | 3702 | ospf->lsa_refresh_queue.index = |
9dbc7972 | 3703 | ((unsigned long)(ospf->lsa_refresh_queue.index + |
cf672a86 | 3704 | (monotime(NULL) - ospf->lsa_refresher_started) |
c363d386 PJ |
3705 | / OSPF_LSA_REFRESHER_GRANULARITY)) |
3706 | % OSPF_LSA_REFRESHER_SLOTS; | |
718e3744 | 3707 | |
3708 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3709 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): next index %d", |
68980084 | 3710 | ospf->lsa_refresh_queue.index); |
718e3744 | 3711 | |
68980084 | 3712 | for (;i != ospf->lsa_refresh_queue.index; |
718e3744 | 3713 | i = (i + 1) % OSPF_LSA_REFRESHER_SLOTS) |
3714 | { | |
3715 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3716 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): " |
d4a53d58 | 3717 | "refresh index %d", i); |
718e3744 | 3718 | |
68980084 | 3719 | refresh_list = ospf->lsa_refresh_queue.qs [i]; |
718e3744 | 3720 | |
6634974d PJ |
3721 | assert (i >= 0); |
3722 | ||
68980084 | 3723 | ospf->lsa_refresh_queue.qs [i] = NULL; |
3724 | ||
718e3744 | 3725 | if (refresh_list) |
3726 | { | |
1eb8ef25 | 3727 | for (ALL_LIST_ELEMENTS (refresh_list, node, nnode, lsa)) |
718e3744 | 3728 | { |
718e3744 | 3729 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) |
535c84b1 | 3730 | zlog_debug ("LSA[Refresh:Type%d:%s]: ospf_lsa_refresh_walker(): " |
6c4f4e6e DL |
3731 | "refresh lsa %p (slot %d)", |
3732 | lsa->data->type, inet_ntoa (lsa->data->id), (void *)lsa, i); | |
3733 | ||
6634974d | 3734 | assert (lsa->lock > 0); |
718e3744 | 3735 | list_delete_node (refresh_list, node); |
718e3744 | 3736 | lsa->refresh_list = -1; |
3737 | listnode_add (lsa_to_refresh, lsa); | |
718e3744 | 3738 | } |
3739 | list_free (refresh_list); | |
3740 | } | |
3741 | } | |
3742 | ||
66e78ae6 QY |
3743 | ospf->t_lsa_refresher = NULL; |
3744 | thread_add_timer(master, ospf_lsa_refresh_walker, ospf, ospf->lsa_refresh_interval, | |
3745 | &ospf->t_lsa_refresher); | |
cf672a86 | 3746 | ospf->lsa_refresher_started = monotime(NULL); |
718e3744 | 3747 | |
1eb8ef25 | 3748 | for (ALL_LIST_ELEMENTS (lsa_to_refresh, node, nnode, lsa)) |
6634974d PJ |
3749 | { |
3750 | ospf_lsa_refresh (ospf, lsa); | |
3751 | assert (lsa->lock > 0); | |
3752 | ospf_lsa_unlock (&lsa); /* lsa_refresh_queue & temp for lsa_to_refresh*/ | |
3753 | } | |
718e3744 | 3754 | |
3755 | list_delete (lsa_to_refresh); | |
3756 | ||
3757 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3758 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): end"); |
718e3744 | 3759 | |
3760 | return 0; | |
3761 | } | |
3762 |