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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" | |
d62a17ae | 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" | |
493472ba | 52 | #include "ospfd/ospf_abr.h" |
718e3744 | 53 | |
6b0655a2 | 54 | |
d62a17ae | 55 | u_int32_t get_metric(u_char *metric) |
718e3744 | 56 | { |
d62a17ae | 57 | u_int32_t m; |
58 | m = metric[0]; | |
59 | m = (m << 8) + metric[1]; | |
60 | m = (m << 8) + metric[2]; | |
61 | return m; | |
718e3744 | 62 | } |
63 | ||
6b0655a2 | 64 | |
d62a17ae | 65 | struct timeval int2tv(int a) |
b6927875 | 66 | { |
d62a17ae | 67 | struct timeval ret; |
b6927875 | 68 | |
d62a17ae | 69 | ret.tv_sec = a; |
70 | ret.tv_usec = 0; | |
b6927875 | 71 | |
d62a17ae | 72 | return ret; |
b6927875 DS |
73 | } |
74 | ||
d62a17ae | 75 | struct timeval msec2tv(int a) |
718e3744 | 76 | { |
d62a17ae | 77 | struct timeval ret; |
718e3744 | 78 | |
d62a17ae | 79 | ret.tv_sec = a / 1000; |
80 | ret.tv_usec = (a % 1000) * 1000; | |
718e3744 | 81 | |
d62a17ae | 82 | return ret; |
718e3744 | 83 | } |
84 | ||
d62a17ae | 85 | int ospf_lsa_refresh_delay(struct ospf_lsa *lsa) |
718e3744 | 86 | { |
d62a17ae | 87 | struct timeval delta; |
88 | int delay = 0; | |
718e3744 | 89 | |
d62a17ae | 90 | if (monotime_since(&lsa->tv_orig, &delta) |
91 | < OSPF_MIN_LS_INTERVAL * 1000LL) { | |
92 | struct timeval minv = msec2tv(OSPF_MIN_LS_INTERVAL); | |
93 | timersub(&minv, &delta, &minv); | |
cbf3e3eb | 94 | |
d62a17ae | 95 | /* TBD: remove padding to full sec, return timeval instead */ |
96 | delay = minv.tv_sec + !!minv.tv_usec; | |
718e3744 | 97 | |
d62a17ae | 98 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) |
99 | zlog_debug( | |
100 | "LSA[Type%d:%s]: Refresh timer delay %d seconds", | |
101 | lsa->data->type, inet_ntoa(lsa->data->id), | |
102 | delay); | |
718e3744 | 103 | |
d62a17ae | 104 | assert(delay > 0); |
105 | } | |
718e3744 | 106 | |
d62a17ae | 107 | return delay; |
718e3744 | 108 | } |
109 | ||
6b0655a2 | 110 | |
d62a17ae | 111 | int get_age(struct ospf_lsa *lsa) |
718e3744 | 112 | { |
d62a17ae | 113 | struct timeval rel; |
718e3744 | 114 | |
d62a17ae | 115 | monotime_since(&lsa->tv_recv, &rel); |
116 | return ntohs(lsa->data->ls_age) + rel.tv_sec; | |
718e3744 | 117 | } |
118 | ||
6b0655a2 | 119 | |
718e3744 | 120 | /* Fletcher Checksum -- Refer to RFC1008. */ |
718e3744 | 121 | |
d62a17ae | 122 | /* All the offsets are zero-based. The offsets in the RFC1008 are |
6a270cd9 | 123 | one-based. */ |
d62a17ae | 124 | u_int16_t ospf_lsa_checksum(struct lsa_header *lsa) |
718e3744 | 125 | { |
d62a17ae | 126 | u_char *buffer = (u_char *)&lsa->options; |
127 | int options_offset = buffer - (u_char *)&lsa->ls_age; /* should be 2 */ | |
718e3744 | 128 | |
d62a17ae | 129 | /* Skip the AGE field */ |
130 | u_int16_t len = ntohs(lsa->length) - options_offset; | |
718e3744 | 131 | |
d62a17ae | 132 | /* Checksum offset starts from "options" field, not the beginning of the |
133 | lsa_header struct. The offset is 14, rather than 16. */ | |
134 | int checksum_offset = (u_char *)&lsa->checksum - buffer; | |
718e3744 | 135 | |
d62a17ae | 136 | return fletcher_checksum(buffer, len, checksum_offset); |
718e3744 | 137 | } |
138 | ||
d62a17ae | 139 | int ospf_lsa_checksum_valid(struct lsa_header *lsa) |
d8a4e42b | 140 | { |
d62a17ae | 141 | u_char *buffer = (u_char *)&lsa->options; |
142 | int options_offset = buffer - (u_char *)&lsa->ls_age; /* should be 2 */ | |
d8a4e42b | 143 | |
d62a17ae | 144 | /* Skip the AGE field */ |
145 | u_int16_t len = ntohs(lsa->length) - options_offset; | |
d8a4e42b | 146 | |
d62a17ae | 147 | return (fletcher_checksum(buffer, len, FLETCHER_CHECKSUM_VALIDATE) |
148 | == 0); | |
d8a4e42b JR |
149 | } |
150 | ||
718e3744 | 151 | |
718e3744 | 152 | /* Create OSPF LSA. */ |
d62a17ae | 153 | struct ospf_lsa *ospf_lsa_new() |
718e3744 | 154 | { |
d62a17ae | 155 | struct ospf_lsa *new; |
718e3744 | 156 | |
d62a17ae | 157 | new = XCALLOC(MTYPE_OSPF_LSA, sizeof(struct ospf_lsa)); |
718e3744 | 158 | |
d62a17ae | 159 | new->flags = 0; |
160 | new->lock = 1; | |
161 | new->retransmit_counter = 0; | |
162 | monotime(&new->tv_recv); | |
163 | new->tv_orig = new->tv_recv; | |
164 | new->refresh_list = -1; | |
b5a8894d | 165 | new->vrf_id = VRF_DEFAULT; |
d62a17ae | 166 | |
167 | return new; | |
718e3744 | 168 | } |
169 | ||
170 | /* Duplicate OSPF LSA. */ | |
d62a17ae | 171 | struct ospf_lsa *ospf_lsa_dup(struct ospf_lsa *lsa) |
718e3744 | 172 | { |
d62a17ae | 173 | struct ospf_lsa *new; |
718e3744 | 174 | |
d62a17ae | 175 | if (lsa == NULL) |
176 | return NULL; | |
718e3744 | 177 | |
d62a17ae | 178 | new = XCALLOC(MTYPE_OSPF_LSA, sizeof(struct ospf_lsa)); |
718e3744 | 179 | |
d62a17ae | 180 | memcpy(new, lsa, sizeof(struct ospf_lsa)); |
181 | UNSET_FLAG(new->flags, OSPF_LSA_DISCARD); | |
182 | new->lock = 1; | |
183 | new->retransmit_counter = 0; | |
184 | new->data = ospf_lsa_data_dup(lsa->data); | |
718e3744 | 185 | |
d62a17ae | 186 | /* kevinm: Clear the refresh_list, otherwise there are going |
187 | to be problems when we try to remove the LSA from the | |
188 | queue (which it's not a member of.) | |
189 | XXX: Should we add the LSA to the refresh_list queue? */ | |
190 | new->refresh_list = -1; | |
f2c80652 | 191 | |
d62a17ae | 192 | if (IS_DEBUG_OSPF(lsa, LSA)) |
193 | zlog_debug("LSA: duplicated %p (new: %p)", (void *)lsa, | |
194 | (void *)new); | |
f2c80652 | 195 | |
d62a17ae | 196 | return new; |
718e3744 | 197 | } |
198 | ||
199 | /* Free OSPF LSA. */ | |
d62a17ae | 200 | void ospf_lsa_free(struct ospf_lsa *lsa) |
718e3744 | 201 | { |
d62a17ae | 202 | assert(lsa->lock == 0); |
203 | ||
204 | if (IS_DEBUG_OSPF(lsa, LSA)) | |
205 | zlog_debug("LSA: freed %p", (void *)lsa); | |
718e3744 | 206 | |
d62a17ae | 207 | /* Delete LSA data. */ |
208 | if (lsa->data != NULL) | |
209 | ospf_lsa_data_free(lsa->data); | |
718e3744 | 210 | |
d62a17ae | 211 | assert(lsa->refresh_list < 0); |
718e3744 | 212 | |
d62a17ae | 213 | memset(lsa, 0, sizeof(struct ospf_lsa)); |
214 | XFREE(MTYPE_OSPF_LSA, lsa); | |
718e3744 | 215 | } |
216 | ||
217 | /* Lock LSA. */ | |
d62a17ae | 218 | struct ospf_lsa *ospf_lsa_lock(struct ospf_lsa *lsa) |
718e3744 | 219 | { |
d62a17ae | 220 | lsa->lock++; |
221 | return lsa; | |
718e3744 | 222 | } |
223 | ||
224 | /* Unlock LSA. */ | |
d62a17ae | 225 | void ospf_lsa_unlock(struct ospf_lsa **lsa) |
718e3744 | 226 | { |
d62a17ae | 227 | /* This is sanity check. */ |
228 | if (!lsa || !*lsa) | |
229 | return; | |
718e3744 | 230 | |
d62a17ae | 231 | (*lsa)->lock--; |
718e3744 | 232 | |
d62a17ae | 233 | assert((*lsa)->lock >= 0); |
234 | ||
235 | if ((*lsa)->lock == 0) { | |
236 | assert(CHECK_FLAG((*lsa)->flags, OSPF_LSA_DISCARD)); | |
237 | ospf_lsa_free(*lsa); | |
238 | *lsa = NULL; | |
239 | } | |
718e3744 | 240 | } |
241 | ||
242 | /* Check discard flag. */ | |
d62a17ae | 243 | void ospf_lsa_discard(struct ospf_lsa *lsa) |
718e3744 | 244 | { |
d62a17ae | 245 | if (!CHECK_FLAG(lsa->flags, OSPF_LSA_DISCARD)) { |
246 | SET_FLAG(lsa->flags, OSPF_LSA_DISCARD); | |
247 | ospf_lsa_unlock(&lsa); | |
248 | } | |
718e3744 | 249 | } |
250 | ||
251 | /* Create LSA data. */ | |
d62a17ae | 252 | struct lsa_header *ospf_lsa_data_new(size_t size) |
718e3744 | 253 | { |
d62a17ae | 254 | return XCALLOC(MTYPE_OSPF_LSA_DATA, size); |
718e3744 | 255 | } |
256 | ||
257 | /* Duplicate LSA data. */ | |
d62a17ae | 258 | struct lsa_header *ospf_lsa_data_dup(struct lsa_header *lsah) |
718e3744 | 259 | { |
d62a17ae | 260 | struct lsa_header *new; |
718e3744 | 261 | |
d62a17ae | 262 | new = ospf_lsa_data_new(ntohs(lsah->length)); |
263 | memcpy(new, lsah, ntohs(lsah->length)); | |
718e3744 | 264 | |
d62a17ae | 265 | return new; |
718e3744 | 266 | } |
267 | ||
268 | /* Free LSA data. */ | |
d62a17ae | 269 | void ospf_lsa_data_free(struct lsa_header *lsah) |
718e3744 | 270 | { |
d62a17ae | 271 | if (IS_DEBUG_OSPF(lsa, LSA)) |
272 | zlog_debug("LSA[Type%d:%s]: data freed %p", lsah->type, | |
273 | inet_ntoa(lsah->id), (void *)lsah); | |
718e3744 | 274 | |
d62a17ae | 275 | XFREE(MTYPE_OSPF_LSA_DATA, lsah); |
718e3744 | 276 | } |
277 | ||
6b0655a2 | 278 | |
718e3744 | 279 | /* LSA general functions. */ |
280 | ||
d62a17ae | 281 | const char *dump_lsa_key(struct ospf_lsa *lsa) |
718e3744 | 282 | { |
d62a17ae | 283 | static char buf[] = {"Type255,id(255.255.255.255),ar(255.255.255.255)"}; |
284 | struct lsa_header *lsah; | |
718e3744 | 285 | |
d62a17ae | 286 | if (lsa != NULL && (lsah = lsa->data) != NULL) { |
287 | char id[INET_ADDRSTRLEN], ar[INET_ADDRSTRLEN]; | |
a1d6bbb1 RW |
288 | strlcpy(id, inet_ntoa(lsah->id), sizeof(id)); |
289 | strlcpy(ar, inet_ntoa(lsah->adv_router), sizeof(ar)); | |
718e3744 | 290 | |
d62a17ae | 291 | sprintf(buf, "Type%d,id(%s),ar(%s)", lsah->type, id, ar); |
292 | } else | |
a1d6bbb1 | 293 | strlcpy(buf, "NULL", sizeof(buf)); |
718e3744 | 294 | |
d62a17ae | 295 | return buf; |
718e3744 | 296 | } |
297 | ||
d62a17ae | 298 | u_int32_t lsa_seqnum_increment(struct ospf_lsa *lsa) |
718e3744 | 299 | { |
d62a17ae | 300 | u_int32_t seqnum; |
718e3744 | 301 | |
d62a17ae | 302 | seqnum = ntohl(lsa->data->ls_seqnum) + 1; |
718e3744 | 303 | |
d62a17ae | 304 | return htonl(seqnum); |
718e3744 | 305 | } |
306 | ||
d62a17ae | 307 | void lsa_header_set(struct stream *s, u_char options, u_char type, |
308 | struct in_addr id, struct in_addr router_id) | |
718e3744 | 309 | { |
d62a17ae | 310 | struct lsa_header *lsah; |
718e3744 | 311 | |
d62a17ae | 312 | lsah = (struct lsa_header *)STREAM_DATA(s); |
718e3744 | 313 | |
d62a17ae | 314 | lsah->ls_age = htons(OSPF_LSA_INITIAL_AGE); |
315 | lsah->options = options; | |
316 | lsah->type = type; | |
317 | lsah->id = id; | |
318 | lsah->adv_router = router_id; | |
319 | lsah->ls_seqnum = htonl(OSPF_INITIAL_SEQUENCE_NUMBER); | |
718e3744 | 320 | |
d62a17ae | 321 | stream_forward_endp(s, OSPF_LSA_HEADER_SIZE); |
718e3744 | 322 | } |
6b0655a2 | 323 | |
68980084 | 324 | |
718e3744 | 325 | /* router-LSA related functions. */ |
326 | /* Get router-LSA flags. */ | |
d62a17ae | 327 | static u_char router_lsa_flags(struct ospf_area *area) |
328 | { | |
329 | u_char flags; | |
330 | ||
331 | flags = area->ospf->flags; | |
332 | ||
333 | /* Set virtual link flag. */ | |
334 | if (ospf_full_virtual_nbrs(area)) | |
335 | SET_FLAG(flags, ROUTER_LSA_VIRTUAL); | |
336 | else | |
337 | /* Just sanity check */ | |
338 | UNSET_FLAG(flags, ROUTER_LSA_VIRTUAL); | |
339 | ||
340 | /* Set Shortcut ABR behabiour flag. */ | |
341 | UNSET_FLAG(flags, ROUTER_LSA_SHORTCUT); | |
342 | if (area->ospf->abr_type == OSPF_ABR_SHORTCUT) | |
343 | if (!OSPF_IS_AREA_BACKBONE(area)) | |
344 | if ((area->shortcut_configured == OSPF_SHORTCUT_DEFAULT | |
345 | && area->ospf->backbone == NULL) | |
346 | || area->shortcut_configured | |
347 | == OSPF_SHORTCUT_ENABLE) | |
348 | SET_FLAG(flags, ROUTER_LSA_SHORTCUT); | |
349 | ||
350 | /* ASBR can't exit in stub area. */ | |
351 | if (area->external_routing == OSPF_AREA_STUB) | |
352 | UNSET_FLAG(flags, ROUTER_LSA_EXTERNAL); | |
353 | /* If ASBR set External flag */ | |
354 | else if (IS_OSPF_ASBR(area->ospf)) | |
355 | SET_FLAG(flags, ROUTER_LSA_EXTERNAL); | |
356 | ||
357 | /* Set ABR dependent flags */ | |
358 | if (IS_OSPF_ABR(area->ospf)) { | |
359 | SET_FLAG(flags, ROUTER_LSA_BORDER); | |
360 | /* If Area is NSSA and we are both ABR and unconditional | |
361 | * translator, | |
362 | * set Nt bit to inform other routers. | |
363 | */ | |
364 | if ((area->external_routing == OSPF_AREA_NSSA) | |
365 | && (area->NSSATranslatorRole == OSPF_NSSA_ROLE_ALWAYS)) | |
366 | SET_FLAG(flags, ROUTER_LSA_NT); | |
367 | } | |
368 | return flags; | |
718e3744 | 369 | } |
370 | ||
371 | /* Lookup neighbor other than myself. | |
372 | And check neighbor count, | |
373 | Point-to-Point link must have only 1 neighbor. */ | |
d62a17ae | 374 | struct ospf_neighbor *ospf_nbr_lookup_ptop(struct ospf_interface *oi) |
718e3744 | 375 | { |
d62a17ae | 376 | struct ospf_neighbor *nbr = NULL; |
377 | struct route_node *rn; | |
718e3744 | 378 | |
d62a17ae | 379 | /* Search neighbor, there must be one of two nbrs. */ |
380 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) | |
381 | if ((nbr = rn->info)) | |
382 | if (!IPV4_ADDR_SAME(&nbr->router_id, | |
383 | &oi->ospf->router_id)) | |
384 | if (nbr->state == NSM_Full) { | |
385 | route_unlock_node(rn); | |
386 | break; | |
387 | } | |
718e3744 | 388 | |
d62a17ae | 389 | /* PtoP link must have only 1 neighbor. */ |
390 | if (ospf_nbr_count(oi, 0) > 1) | |
391 | zlog_warn("Point-to-Point link has more than 1 neighobrs."); | |
718e3744 | 392 | |
d62a17ae | 393 | return nbr; |
718e3744 | 394 | } |
395 | ||
88d6cf37 | 396 | /* Determine cost of link, taking RFC3137 stub-router support into |
397 | * consideration | |
398 | */ | |
d62a17ae | 399 | static u_int16_t ospf_link_cost(struct ospf_interface *oi) |
88d6cf37 | 400 | { |
d62a17ae | 401 | /* RFC3137 stub router support */ |
402 | if (!CHECK_FLAG(oi->area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED)) | |
403 | return oi->output_cost; | |
404 | else | |
405 | return OSPF_OUTPUT_COST_INFINITE; | |
88d6cf37 | 406 | } |
407 | ||
718e3744 | 408 | /* Set a link information. */ |
d62a17ae | 409 | static char link_info_set(struct stream *s, struct in_addr id, |
410 | struct in_addr data, u_char type, u_char tos, | |
411 | u_int16_t cost) | |
412 | { | |
413 | /* LSA stream is initially allocated to OSPF_MAX_LSA_SIZE, suits | |
414 | * vast majority of cases. Some rare routers with lots of links need | |
415 | * more. | |
416 | * we try accomodate those here. | |
417 | */ | |
418 | if (STREAM_WRITEABLE(s) < OSPF_ROUTER_LSA_LINK_SIZE) { | |
419 | size_t ret = OSPF_MAX_LSA_SIZE; | |
420 | ||
421 | /* Can we enlarge the stream still? */ | |
422 | if (STREAM_SIZE(s) == OSPF_MAX_LSA_SIZE) { | |
423 | /* we futz the size here for simplicity, really we need | |
424 | * to account | |
425 | * for just: | |
426 | * IP Header - (sizeof (struct ip)) | |
427 | * OSPF Header - OSPF_HEADER_SIZE | |
428 | * LSA Header - OSPF_LSA_HEADER_SIZE | |
429 | * MD5 auth data, if MD5 is configured - | |
430 | * OSPF_AUTH_MD5_SIZE. | |
431 | * | |
432 | * Simpler just to subtract OSPF_MAX_LSA_SIZE though. | |
433 | */ | |
9d303b37 DL |
434 | ret = stream_resize( |
435 | s, OSPF_MAX_PACKET_SIZE - OSPF_MAX_LSA_SIZE); | |
d62a17ae | 436 | } |
437 | ||
438 | if (ret == OSPF_MAX_LSA_SIZE) { | |
439 | zlog_warn( | |
440 | "%s: Out of space in LSA stream, left %zd, size %zd", | |
2d34fb80 | 441 | __func__, STREAM_WRITEABLE(s), STREAM_SIZE(s)); |
d62a17ae | 442 | return 0; |
443 | } | |
444 | } | |
445 | ||
446 | /* TOS based routing is not supported. */ | |
447 | stream_put_ipv4(s, id.s_addr); /* Link ID. */ | |
448 | stream_put_ipv4(s, data.s_addr); /* Link Data. */ | |
449 | stream_putc(s, type); /* Link Type. */ | |
450 | stream_putc(s, tos); /* TOS = 0. */ | |
451 | stream_putw(s, cost); /* Link Cost. */ | |
452 | ||
453 | return 1; | |
718e3744 | 454 | } |
455 | ||
e4529636 | 456 | /* Describe Point-to-Point link (Section 12.4.1.1). */ |
d62a17ae | 457 | static int lsa_link_ptop_set(struct stream *s, struct ospf_interface *oi) |
458 | { | |
459 | int links = 0; | |
460 | struct ospf_neighbor *nbr; | |
461 | struct in_addr id, mask, data; | |
462 | u_int16_t cost = ospf_link_cost(oi); | |
463 | ||
464 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
465 | zlog_debug("LSA[Type1]: Set link Point-to-Point"); | |
466 | ||
467 | if ((nbr = ospf_nbr_lookup_ptop(oi))) | |
468 | if (nbr->state == NSM_Full) { | |
469 | if (CHECK_FLAG(oi->connected->flags, | |
470 | ZEBRA_IFA_UNNUMBERED)) { | |
471 | /* For unnumbered point-to-point networks, the | |
472 | Link Data field | |
473 | should specify the interface's MIB-II ifIndex | |
474 | value. */ | |
475 | data.s_addr = htonl(oi->ifp->ifindex); | |
476 | links += link_info_set( | |
477 | s, nbr->router_id, data, | |
478 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
479 | } else { | |
480 | links += link_info_set( | |
481 | s, nbr->router_id, | |
482 | oi->address->u.prefix4, | |
483 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
484 | } | |
485 | } | |
486 | ||
487 | /* no need for a stub link for unnumbered interfaces */ | |
488 | if (!CHECK_FLAG(oi->connected->flags, ZEBRA_IFA_UNNUMBERED)) { | |
489 | /* Regardless of the state of the neighboring router, we must | |
490 | add a Type 3 link (stub network). | |
491 | N.B. Options 1 & 2 share basically the same logic. */ | |
492 | masklen2ip(oi->address->prefixlen, &mask); | |
493 | id.s_addr = CONNECTED_PREFIX(oi->connected)->u.prefix4.s_addr | |
494 | & mask.s_addr; | |
495 | links += link_info_set(s, id, mask, LSA_LINK_TYPE_STUB, 0, | |
496 | oi->output_cost); | |
497 | } | |
498 | ||
499 | return links; | |
718e3744 | 500 | } |
501 | ||
502 | /* Describe Broadcast Link. */ | |
d62a17ae | 503 | static int lsa_link_broadcast_set(struct stream *s, struct ospf_interface *oi) |
504 | { | |
505 | struct ospf_neighbor *dr; | |
506 | struct in_addr id, mask; | |
507 | u_int16_t cost = ospf_link_cost(oi); | |
508 | ||
509 | /* Describe Type 3 Link. */ | |
510 | if (oi->state == ISM_Waiting) { | |
511 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
512 | zlog_debug( | |
513 | "LSA[Type1]: Interface %s is in state Waiting. " | |
514 | "Adding stub interface", | |
515 | oi->ifp->name); | |
516 | masklen2ip(oi->address->prefixlen, &mask); | |
517 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
518 | return link_info_set(s, id, mask, LSA_LINK_TYPE_STUB, 0, | |
519 | oi->output_cost); | |
520 | } | |
521 | ||
522 | dr = ospf_nbr_lookup_by_addr(oi->nbrs, &DR(oi)); | |
523 | /* Describe Type 2 link. */ | |
9d303b37 DL |
524 | if (dr && (dr->state == NSM_Full |
525 | || IPV4_ADDR_SAME(&oi->address->u.prefix4, &DR(oi))) | |
d62a17ae | 526 | && ospf_nbr_count(oi, NSM_Full) > 0) { |
527 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
528 | zlog_debug( | |
529 | "LSA[Type1]: Interface %s has a DR. " | |
530 | "Adding transit interface", | |
531 | oi->ifp->name); | |
532 | return link_info_set(s, DR(oi), oi->address->u.prefix4, | |
533 | LSA_LINK_TYPE_TRANSIT, 0, cost); | |
534 | } | |
535 | /* Describe type 3 link. */ | |
536 | else { | |
537 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
538 | zlog_debug( | |
539 | "LSA[Type1]: Interface %s has no DR. " | |
540 | "Adding stub interface", | |
541 | oi->ifp->name); | |
542 | masklen2ip(oi->address->prefixlen, &mask); | |
543 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
544 | return link_info_set(s, id, mask, LSA_LINK_TYPE_STUB, 0, | |
545 | oi->output_cost); | |
546 | } | |
547 | } | |
548 | ||
549 | static int lsa_link_loopback_set(struct stream *s, struct ospf_interface *oi) | |
550 | { | |
551 | struct in_addr id, mask; | |
552 | ||
553 | /* Describe Type 3 Link. */ | |
554 | if (oi->state != ISM_Loopback) | |
555 | return 0; | |
556 | ||
557 | mask.s_addr = 0xffffffff; | |
558 | id.s_addr = oi->address->u.prefix4.s_addr; | |
559 | return link_info_set(s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); | |
718e3744 | 560 | } |
561 | ||
562 | /* Describe Virtual Link. */ | |
d62a17ae | 563 | static int lsa_link_virtuallink_set(struct stream *s, struct ospf_interface *oi) |
718e3744 | 564 | { |
d62a17ae | 565 | struct ospf_neighbor *nbr; |
566 | u_int16_t cost = ospf_link_cost(oi); | |
718e3744 | 567 | |
d62a17ae | 568 | if (oi->state == ISM_PointToPoint) |
569 | if ((nbr = ospf_nbr_lookup_ptop(oi))) | |
570 | if (nbr->state == NSM_Full) { | |
571 | return link_info_set(s, nbr->router_id, | |
572 | oi->address->u.prefix4, | |
573 | LSA_LINK_TYPE_VIRTUALLINK, | |
574 | 0, cost); | |
575 | } | |
718e3744 | 576 | |
d62a17ae | 577 | return 0; |
718e3744 | 578 | } |
579 | ||
580 | #define lsa_link_nbma_set(S,O) lsa_link_broadcast_set (S, O) | |
581 | ||
d62a17ae | 582 | /* this function add for support point-to-multipoint ,see rfc2328 |
7afa08da | 583 | 12.4.1.4.*/ |
584 | /* from "edward rrr" <edward_rrr@hotmail.com> | |
585 | http://marc.theaimsgroup.com/?l=zebra&m=100739222210507&w=2 */ | |
d62a17ae | 586 | static int lsa_link_ptomp_set(struct stream *s, struct ospf_interface *oi) |
587 | { | |
588 | int links = 0; | |
589 | struct route_node *rn; | |
590 | struct ospf_neighbor *nbr = NULL; | |
591 | struct in_addr id, mask; | |
592 | u_int16_t cost = ospf_link_cost(oi); | |
593 | ||
594 | mask.s_addr = 0xffffffff; | |
595 | id.s_addr = oi->address->u.prefix4.s_addr; | |
596 | links += link_info_set(s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); | |
597 | ||
598 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
599 | zlog_debug("PointToMultipoint: running ptomultip_set"); | |
600 | ||
601 | /* Search neighbor, */ | |
602 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) | |
603 | if ((nbr = rn->info) != NULL) | |
604 | /* Ignore myself. */ | |
605 | if (!IPV4_ADDR_SAME(&nbr->router_id, | |
606 | &oi->ospf->router_id)) | |
607 | if (nbr->state == NSM_Full) | |
608 | ||
609 | { | |
610 | links += link_info_set( | |
611 | s, nbr->router_id, | |
612 | oi->address->u.prefix4, | |
613 | LSA_LINK_TYPE_POINTOPOINT, 0, | |
614 | cost); | |
615 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
616 | zlog_debug( | |
617 | "PointToMultipoint: set link to %s", | |
618 | inet_ntoa( | |
619 | oi->address->u | |
620 | .prefix4)); | |
621 | } | |
622 | ||
623 | return links; | |
7afa08da | 624 | } |
625 | ||
718e3744 | 626 | /* Set router-LSA link information. */ |
d62a17ae | 627 | static int router_lsa_link_set(struct stream *s, struct ospf_area *area) |
628 | { | |
629 | struct listnode *node; | |
630 | struct ospf_interface *oi; | |
631 | int links = 0; | |
632 | ||
633 | for (ALL_LIST_ELEMENTS_RO(area->oiflist, node, oi)) { | |
634 | struct interface *ifp = oi->ifp; | |
635 | ||
636 | /* Check interface is up, OSPF is enable. */ | |
637 | if (if_is_operative(ifp)) { | |
638 | if (oi->state != ISM_Down) { | |
639 | oi->lsa_pos_beg = links; | |
640 | /* Describe each link. */ | |
641 | switch (oi->type) { | |
642 | case OSPF_IFTYPE_POINTOPOINT: | |
643 | links += lsa_link_ptop_set(s, oi); | |
644 | break; | |
645 | case OSPF_IFTYPE_BROADCAST: | |
646 | links += lsa_link_broadcast_set(s, oi); | |
647 | break; | |
648 | case OSPF_IFTYPE_NBMA: | |
649 | links += lsa_link_nbma_set(s, oi); | |
650 | break; | |
651 | case OSPF_IFTYPE_POINTOMULTIPOINT: | |
652 | links += lsa_link_ptomp_set(s, oi); | |
653 | break; | |
654 | case OSPF_IFTYPE_VIRTUALLINK: | |
655 | links += | |
656 | lsa_link_virtuallink_set(s, oi); | |
657 | break; | |
658 | case OSPF_IFTYPE_LOOPBACK: | |
659 | links += lsa_link_loopback_set(s, oi); | |
660 | } | |
661 | oi->lsa_pos_end = links; | |
662 | } | |
718e3744 | 663 | } |
718e3744 | 664 | } |
718e3744 | 665 | |
d62a17ae | 666 | return links; |
718e3744 | 667 | } |
668 | ||
669 | /* Set router-LSA body. */ | |
d62a17ae | 670 | static void ospf_router_lsa_body_set(struct stream *s, struct ospf_area *area) |
671 | { | |
672 | unsigned long putp; | |
673 | u_int16_t cnt; | |
674 | ||
675 | /* Set flags. */ | |
676 | stream_putc(s, router_lsa_flags(area)); | |
677 | ||
678 | /* Set Zero fields. */ | |
679 | stream_putc(s, 0); | |
680 | ||
681 | /* Keep pointer to # links. */ | |
682 | putp = stream_get_endp(s); | |
683 | ||
684 | /* Forward word */ | |
685 | stream_putw(s, 0); | |
686 | ||
687 | /* Set all link information. */ | |
688 | cnt = router_lsa_link_set(s, area); | |
689 | ||
690 | /* Set # of links here. */ | |
691 | stream_putw_at(s, putp, cnt); | |
692 | } | |
693 | ||
694 | static int ospf_stub_router_timer(struct thread *t) | |
695 | { | |
696 | struct ospf_area *area = THREAD_ARG(t); | |
697 | ||
698 | area->t_stub_router = NULL; | |
699 | ||
700 | SET_FLAG(area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
701 | ||
702 | /* clear stub route state and generate router-lsa refresh, don't | |
703 | * clobber an administratively set stub-router state though. | |
704 | */ | |
705 | if (CHECK_FLAG(area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
706 | return 0; | |
707 | ||
708 | UNSET_FLAG(area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
709 | ||
710 | ospf_router_lsa_update_area(area); | |
711 | ||
712 | return 0; | |
713 | } | |
714 | ||
715 | static void ospf_stub_router_check(struct ospf_area *area) | |
716 | { | |
717 | /* area must either be administratively configured to be stub | |
718 | * or startup-time stub-router must be configured and we must in a | |
719 | * pre-stub | |
720 | * state. | |
721 | */ | |
722 | if (CHECK_FLAG(area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) { | |
723 | SET_FLAG(area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
724 | return; | |
725 | } | |
726 | ||
727 | /* not admin-stubbed, check whether startup stubbing is configured and | |
728 | * whether it's not been done yet | |
729 | */ | |
730 | if (CHECK_FLAG(area->stub_router_state, | |
731 | OSPF_AREA_WAS_START_STUB_ROUTED)) | |
732 | return; | |
733 | ||
734 | if (area->ospf->stub_router_startup_time | |
735 | == OSPF_STUB_ROUTER_UNCONFIGURED) { | |
736 | /* stub-router is hence done forever for this area, even if | |
737 | * someone | |
738 | * tries configure it (take effect next restart). | |
739 | */ | |
740 | SET_FLAG(area->stub_router_state, | |
741 | OSPF_AREA_WAS_START_STUB_ROUTED); | |
742 | return; | |
743 | } | |
744 | ||
745 | /* startup stub-router configured and not yet done */ | |
746 | SET_FLAG(area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
747 | ||
748 | OSPF_AREA_TIMER_ON(area->t_stub_router, ospf_stub_router_timer, | |
749 | area->ospf->stub_router_startup_time); | |
750 | } | |
751 | ||
718e3744 | 752 | /* Create new router-LSA. */ |
d62a17ae | 753 | static struct ospf_lsa *ospf_router_lsa_new(struct ospf_area *area) |
754 | { | |
755 | struct ospf *ospf = area->ospf; | |
756 | struct stream *s; | |
757 | struct lsa_header *lsah; | |
758 | struct ospf_lsa *new; | |
759 | int length; | |
760 | ||
761 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
762 | zlog_debug("LSA[Type1]: Create router-LSA instance"); | |
763 | ||
764 | /* check whether stub-router is desired, and if this is the first | |
765 | * router LSA. | |
766 | */ | |
767 | ospf_stub_router_check(area); | |
768 | ||
769 | /* Create a stream for LSA. */ | |
770 | s = stream_new(OSPF_MAX_LSA_SIZE); | |
771 | /* Set LSA common header fields. */ | |
772 | lsa_header_set(s, LSA_OPTIONS_GET(area) | LSA_OPTIONS_NSSA_GET(area), | |
773 | OSPF_ROUTER_LSA, ospf->router_id, ospf->router_id); | |
774 | ||
775 | /* Set router-LSA body fields. */ | |
776 | ospf_router_lsa_body_set(s, area); | |
777 | ||
778 | /* Set length. */ | |
779 | length = stream_get_endp(s); | |
780 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
781 | lsah->length = htons(length); | |
782 | ||
783 | /* Now, create OSPF LSA instance. */ | |
784 | if ((new = ospf_lsa_new()) == NULL) { | |
785 | zlog_err("%s: Unable to create new lsa", __func__); | |
786 | return NULL; | |
787 | } | |
788 | ||
789 | new->area = area; | |
790 | SET_FLAG(new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); | |
b5a8894d | 791 | new->vrf_id = area->ospf->vrf_id; |
d62a17ae | 792 | |
793 | /* Copy LSA data to store, discard stream. */ | |
794 | new->data = ospf_lsa_data_new(length); | |
795 | memcpy(new->data, lsah, length); | |
796 | stream_free(s); | |
797 | ||
798 | return new; | |
718e3744 | 799 | } |
800 | ||
801 | /* Originate Router-LSA. */ | |
d62a17ae | 802 | static struct ospf_lsa *ospf_router_lsa_originate(struct ospf_area *area) |
718e3744 | 803 | { |
d62a17ae | 804 | struct ospf_lsa *new; |
718e3744 | 805 | |
d62a17ae | 806 | /* Create new router-LSA instance. */ |
807 | if ((new = ospf_router_lsa_new(area)) == NULL) { | |
808 | zlog_err("%s: ospf_router_lsa_new returned NULL", __func__); | |
809 | return NULL; | |
810 | } | |
811 | ||
812 | /* Sanity check. */ | |
813 | if (new->data->adv_router.s_addr == 0) { | |
814 | if (IS_DEBUG_OSPF_EVENT) | |
815 | zlog_debug("LSA[Type1]: AdvRouter is 0, discard"); | |
816 | ospf_lsa_discard(new); | |
817 | return NULL; | |
818 | } | |
718e3744 | 819 | |
d62a17ae | 820 | /* Install LSA to LSDB. */ |
821 | new = ospf_lsa_install(area->ospf, NULL, new); | |
718e3744 | 822 | |
d62a17ae | 823 | /* Update LSA origination count. */ |
824 | area->ospf->lsa_originate_count++; | |
718e3744 | 825 | |
d62a17ae | 826 | /* Flooding new LSA through area. */ |
827 | ospf_flood_through_area(area, NULL, new); | |
718e3744 | 828 | |
d62a17ae | 829 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { |
830 | zlog_debug("LSA[Type%d:%s]: Originate router-LSA %p", | |
831 | new->data->type, inet_ntoa(new->data->id), | |
832 | (void *)new); | |
833 | ospf_lsa_header_dump(new->data); | |
834 | } | |
718e3744 | 835 | |
d62a17ae | 836 | return new; |
718e3744 | 837 | } |
838 | ||
839 | /* Refresh router-LSA. */ | |
d62a17ae | 840 | static struct ospf_lsa *ospf_router_lsa_refresh(struct ospf_lsa *lsa) |
841 | { | |
842 | struct ospf_area *area = lsa->area; | |
843 | struct ospf_lsa *new; | |
844 | ||
845 | /* Sanity check. */ | |
846 | assert(lsa->data); | |
718e3744 | 847 | |
d62a17ae | 848 | /* Delete LSA from neighbor retransmit-list. */ |
849 | ospf_ls_retransmit_delete_nbr_area(area, lsa); | |
718e3744 | 850 | |
d62a17ae | 851 | /* Unregister LSA from refresh-list */ |
852 | ospf_refresher_unregister_lsa(area->ospf, lsa); | |
718e3744 | 853 | |
d62a17ae | 854 | /* Create new router-LSA instance. */ |
855 | if ((new = ospf_router_lsa_new(area)) == NULL) { | |
856 | zlog_err("%s: ospf_router_lsa_new returned NULL", __func__); | |
857 | return NULL; | |
858 | } | |
859 | ||
860 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
718e3744 | 861 | |
d62a17ae | 862 | ospf_lsa_install(area->ospf, NULL, new); |
718e3744 | 863 | |
d62a17ae | 864 | /* Flood LSA through area. */ |
865 | ospf_flood_through_area(area, NULL, new); | |
866 | ||
867 | /* Debug logging. */ | |
868 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
869 | zlog_debug("LSA[Type%d:%s]: router-LSA refresh", | |
870 | new->data->type, inet_ntoa(new->data->id)); | |
871 | ospf_lsa_header_dump(new->data); | |
872 | } | |
718e3744 | 873 | |
d62a17ae | 874 | return NULL; |
718e3744 | 875 | } |
876 | ||
d62a17ae | 877 | int ospf_router_lsa_update_area(struct ospf_area *area) |
718e3744 | 878 | { |
d62a17ae | 879 | if (IS_DEBUG_OSPF_EVENT) |
880 | zlog_debug("[router-LSA]: (router-LSA area update)"); | |
718e3744 | 881 | |
d62a17ae | 882 | /* Now refresh router-LSA. */ |
883 | if (area->router_lsa_self) | |
884 | ospf_lsa_refresh(area->ospf, area->router_lsa_self); | |
885 | /* Newly originate router-LSA. */ | |
886 | else | |
887 | ospf_router_lsa_originate(area); | |
718e3744 | 888 | |
d62a17ae | 889 | return 0; |
718e3744 | 890 | } |
891 | ||
d62a17ae | 892 | int ospf_router_lsa_update(struct ospf *ospf) |
718e3744 | 893 | { |
d62a17ae | 894 | struct listnode *node, *nnode; |
895 | struct ospf_area *area; | |
718e3744 | 896 | |
d62a17ae | 897 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) |
898 | zlog_debug("Timer[router-LSA Update]: (timer expire)"); | |
718e3744 | 899 | |
d62a17ae | 900 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { |
901 | struct ospf_lsa *lsa = area->router_lsa_self; | |
902 | struct router_lsa *rl; | |
903 | const char *area_str; | |
718e3744 | 904 | |
d62a17ae | 905 | /* Keep Area ID string. */ |
906 | area_str = AREA_NAME(area); | |
718e3744 | 907 | |
d62a17ae | 908 | /* If LSA not exist in this Area, originate new. */ |
909 | if (lsa == NULL) { | |
910 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
911 | zlog_debug( | |
912 | "LSA[Type1]: Create router-LSA for Area %s", | |
913 | area_str); | |
718e3744 | 914 | |
d62a17ae | 915 | ospf_router_lsa_originate(area); |
916 | } | |
917 | /* If router-ID is changed, Link ID must change. | |
918 | First flush old LSA, then originate new. */ | |
919 | else if (!IPV4_ADDR_SAME(&lsa->data->id, &ospf->router_id)) { | |
920 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
921 | zlog_debug( | |
922 | "LSA[Type%d:%s]: Refresh router-LSA for Area %s", | |
923 | lsa->data->type, | |
924 | inet_ntoa(lsa->data->id), area_str); | |
925 | ospf_refresher_unregister_lsa(ospf, lsa); | |
926 | ospf_lsa_flush_area(lsa, area); | |
927 | ospf_lsa_unlock(&area->router_lsa_self); | |
928 | area->router_lsa_self = NULL; | |
929 | ||
930 | /* Refresh router-LSA, (not install) and flood through | |
931 | * area. */ | |
932 | ospf_router_lsa_update_area(area); | |
933 | } else { | |
934 | rl = (struct router_lsa *)lsa->data; | |
935 | /* Refresh router-LSA, (not install) and flood through | |
936 | * area. */ | |
937 | if (rl->flags != ospf->flags) | |
938 | ospf_router_lsa_update_area(area); | |
939 | } | |
718e3744 | 940 | } |
718e3744 | 941 | |
d62a17ae | 942 | return 0; |
718e3744 | 943 | } |
944 | ||
6b0655a2 | 945 | |
718e3744 | 946 | /* network-LSA related functions. */ |
947 | /* Originate Network-LSA. */ | |
d62a17ae | 948 | static void ospf_network_lsa_body_set(struct stream *s, |
949 | struct ospf_interface *oi) | |
718e3744 | 950 | { |
d62a17ae | 951 | struct in_addr mask; |
952 | struct route_node *rn; | |
953 | struct ospf_neighbor *nbr; | |
718e3744 | 954 | |
d62a17ae | 955 | masklen2ip(oi->address->prefixlen, &mask); |
956 | stream_put_ipv4(s, mask.s_addr); | |
718e3744 | 957 | |
d62a17ae | 958 | /* The network-LSA lists those routers that are fully adjacent to |
959 | the Designated Router; each fully adjacent router is identified by | |
960 | its OSPF Router ID. The Designated Router includes itself in this | |
961 | list. RFC2328, Section 12.4.2 */ | |
718e3744 | 962 | |
d62a17ae | 963 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) |
964 | if ((nbr = rn->info) != NULL) | |
965 | if (nbr->state == NSM_Full || nbr == oi->nbr_self) | |
966 | stream_put_ipv4(s, nbr->router_id.s_addr); | |
718e3744 | 967 | } |
968 | ||
d62a17ae | 969 | static struct ospf_lsa *ospf_network_lsa_new(struct ospf_interface *oi) |
970 | { | |
971 | struct stream *s; | |
972 | struct ospf_lsa *new; | |
973 | struct lsa_header *lsah; | |
974 | struct ospf_if_params *oip; | |
975 | int length; | |
976 | ||
977 | /* If there are no neighbours on this network (the net is stub), | |
978 | the router does not originate network-LSA (see RFC 12.4.2) */ | |
979 | if (oi->full_nbrs == 0) | |
980 | return NULL; | |
981 | ||
982 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
983 | zlog_debug("LSA[Type2]: Create network-LSA instance"); | |
984 | ||
985 | /* Create new stream for LSA. */ | |
986 | s = stream_new(OSPF_MAX_LSA_SIZE); | |
987 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
988 | ||
989 | lsa_header_set(s, (OPTIONS(oi) | LSA_OPTIONS_GET(oi->area)), | |
990 | OSPF_NETWORK_LSA, DR(oi), oi->ospf->router_id); | |
991 | ||
992 | /* Set network-LSA body fields. */ | |
993 | ospf_network_lsa_body_set(s, oi); | |
994 | ||
995 | /* Set length. */ | |
996 | length = stream_get_endp(s); | |
997 | lsah->length = htons(length); | |
998 | ||
999 | /* Create OSPF LSA instance. */ | |
1000 | if ((new = ospf_lsa_new()) == NULL) { | |
1001 | zlog_err("%s: ospf_lsa_new returned NULL", __func__); | |
1002 | return NULL; | |
1003 | } | |
1004 | ||
1005 | new->area = oi->area; | |
1006 | SET_FLAG(new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); | |
b5a8894d | 1007 | new->vrf_id = oi->ospf->vrf_id; |
d62a17ae | 1008 | |
1009 | /* Copy LSA to store. */ | |
1010 | new->data = ospf_lsa_data_new(length); | |
1011 | memcpy(new->data, lsah, length); | |
1012 | stream_free(s); | |
1013 | ||
1014 | /* Remember prior network LSA sequence numbers, even if we stop | |
1015 | * originating one for this oi, to try avoid re-originating LSAs with a | |
1016 | * prior sequence number, and thus speed up adjency forming & | |
1017 | * convergence. | |
1018 | */ | |
1019 | if ((oip = ospf_lookup_if_params(oi->ifp, oi->address->u.prefix4))) { | |
1020 | new->data->ls_seqnum = oip->network_lsa_seqnum; | |
1021 | new->data->ls_seqnum = lsa_seqnum_increment(new); | |
1022 | } else { | |
1023 | oip = ospf_get_if_params(oi->ifp, oi->address->u.prefix4); | |
1024 | ospf_if_update_params(oi->ifp, oi->address->u.prefix4); | |
1025 | } | |
1026 | oip->network_lsa_seqnum = new->data->ls_seqnum; | |
1027 | ||
1028 | return new; | |
718e3744 | 1029 | } |
1030 | ||
1031 | /* Originate network-LSA. */ | |
d62a17ae | 1032 | void ospf_network_lsa_update(struct ospf_interface *oi) |
718e3744 | 1033 | { |
d62a17ae | 1034 | struct ospf_lsa *new; |
718e3744 | 1035 | |
d62a17ae | 1036 | if (oi->network_lsa_self != NULL) { |
1037 | ospf_lsa_refresh(oi->ospf, oi->network_lsa_self); | |
1038 | return; | |
1039 | } | |
1040 | ||
1041 | /* Create new network-LSA instance. */ | |
1042 | new = ospf_network_lsa_new(oi); | |
1043 | if (new == NULL) | |
1044 | return; | |
718e3744 | 1045 | |
d62a17ae | 1046 | /* Install LSA to LSDB. */ |
1047 | new = ospf_lsa_install(oi->ospf, oi, new); | |
718e3744 | 1048 | |
d62a17ae | 1049 | /* Update LSA origination count. */ |
1050 | oi->ospf->lsa_originate_count++; | |
718e3744 | 1051 | |
d62a17ae | 1052 | /* Flooding new LSA through area. */ |
1053 | ospf_flood_through_area(oi->area, NULL, new); | |
1054 | ||
1055 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1056 | zlog_debug("LSA[Type%d:%s]: Originate network-LSA %p", | |
1057 | new->data->type, inet_ntoa(new->data->id), | |
1058 | (void *)new); | |
1059 | ospf_lsa_header_dump(new->data); | |
1060 | } | |
718e3744 | 1061 | |
d62a17ae | 1062 | return; |
718e3744 | 1063 | } |
1064 | ||
d62a17ae | 1065 | static struct ospf_lsa *ospf_network_lsa_refresh(struct ospf_lsa *lsa) |
1066 | { | |
1067 | struct ospf_area *area = lsa->area; | |
1068 | struct ospf_lsa *new, *new2; | |
1069 | struct ospf_if_params *oip; | |
1070 | struct ospf_interface *oi; | |
1071 | ||
1072 | assert(lsa->data); | |
1073 | ||
1074 | /* Retrieve the oi for the network LSA */ | |
1075 | oi = ospf_if_lookup_by_local_addr(area->ospf, NULL, lsa->data->id); | |
1076 | if (oi == NULL) { | |
1077 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1078 | zlog_debug( | |
1079 | "LSA[Type%d:%s]: network-LSA refresh: " | |
1080 | "no oi found, ick, ignoring.", | |
1081 | lsa->data->type, inet_ntoa(lsa->data->id)); | |
1082 | ospf_lsa_header_dump(lsa->data); | |
1083 | } | |
1084 | return NULL; | |
1085 | } | |
1086 | /* Delete LSA from neighbor retransmit-list. */ | |
1087 | ospf_ls_retransmit_delete_nbr_area(area, lsa); | |
1088 | ||
1089 | /* Unregister LSA from refresh-list */ | |
1090 | ospf_refresher_unregister_lsa(area->ospf, lsa); | |
1091 | ||
1092 | /* Create new network-LSA instance. */ | |
1093 | new = ospf_network_lsa_new(oi); | |
1094 | if (new == NULL) | |
1095 | return NULL; | |
1096 | ||
1097 | oip = ospf_lookup_if_params(oi->ifp, oi->address->u.prefix4); | |
1098 | assert(oip != NULL); | |
1099 | oip->network_lsa_seqnum = new->data->ls_seqnum = | |
1100 | lsa_seqnum_increment(lsa); | |
1101 | ||
1102 | new2 = ospf_lsa_install(area->ospf, oi, new); | |
1103 | ||
1104 | assert(new2 == new); | |
1105 | ||
1106 | /* Flood LSA through aera. */ | |
1107 | ospf_flood_through_area(area, NULL, new); | |
1108 | ||
1109 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1110 | zlog_debug("LSA[Type%d:%s]: network-LSA refresh", | |
1111 | new->data->type, inet_ntoa(new->data->id)); | |
1112 | ospf_lsa_header_dump(new->data); | |
1113 | } | |
1114 | ||
1115 | return new; | |
1116 | } | |
1117 | ||
1118 | static void stream_put_ospf_metric(struct stream *s, u_int32_t metric_value) | |
1119 | { | |
1120 | u_int32_t metric; | |
1121 | char *mp; | |
1122 | ||
1123 | /* Put 0 metric. TOS metric is not supported. */ | |
1124 | metric = htonl(metric_value); | |
1125 | mp = (char *)&metric; | |
1126 | mp++; | |
1127 | stream_put(s, mp, 3); | |
718e3744 | 1128 | } |
1129 | ||
1130 | /* summary-LSA related functions. */ | |
d62a17ae | 1131 | static void ospf_summary_lsa_body_set(struct stream *s, struct prefix *p, |
1132 | u_int32_t metric) | |
718e3744 | 1133 | { |
d62a17ae | 1134 | struct in_addr mask; |
718e3744 | 1135 | |
d62a17ae | 1136 | masklen2ip(p->prefixlen, &mask); |
718e3744 | 1137 | |
d62a17ae | 1138 | /* Put Network Mask. */ |
1139 | stream_put_ipv4(s, mask.s_addr); | |
718e3744 | 1140 | |
d62a17ae | 1141 | /* Set # TOS. */ |
1142 | stream_putc(s, (u_char)0); | |
718e3744 | 1143 | |
d62a17ae | 1144 | /* Set metric. */ |
1145 | stream_put_ospf_metric(s, metric); | |
718e3744 | 1146 | } |
1147 | ||
d62a17ae | 1148 | static struct ospf_lsa *ospf_summary_lsa_new(struct ospf_area *area, |
1149 | struct prefix *p, u_int32_t metric, | |
1150 | struct in_addr id) | |
718e3744 | 1151 | { |
d62a17ae | 1152 | struct stream *s; |
1153 | struct ospf_lsa *new; | |
1154 | struct lsa_header *lsah; | |
1155 | int length; | |
718e3744 | 1156 | |
d62a17ae | 1157 | if (id.s_addr == 0xffffffff) { |
1158 | /* Maybe Link State ID not available. */ | |
1159 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1160 | zlog_debug( | |
1161 | "LSA[Type%d]: Link ID not available, can't originate", | |
1162 | OSPF_SUMMARY_LSA); | |
1163 | return NULL; | |
1164 | } | |
c24d602e | 1165 | |
d62a17ae | 1166 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) |
1167 | zlog_debug("LSA[Type3]: Create summary-LSA instance"); | |
718e3744 | 1168 | |
d62a17ae | 1169 | /* Create new stream for LSA. */ |
1170 | s = stream_new(OSPF_MAX_LSA_SIZE); | |
1171 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
718e3744 | 1172 | |
d62a17ae | 1173 | lsa_header_set(s, LSA_OPTIONS_GET(area), OSPF_SUMMARY_LSA, id, |
1174 | area->ospf->router_id); | |
718e3744 | 1175 | |
d62a17ae | 1176 | /* Set summary-LSA body fields. */ |
1177 | ospf_summary_lsa_body_set(s, p, metric); | |
718e3744 | 1178 | |
d62a17ae | 1179 | /* Set length. */ |
1180 | length = stream_get_endp(s); | |
1181 | lsah->length = htons(length); | |
718e3744 | 1182 | |
d62a17ae | 1183 | /* Create OSPF LSA instance. */ |
1184 | new = ospf_lsa_new(); | |
1185 | new->area = area; | |
1186 | SET_FLAG(new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); | |
b5a8894d | 1187 | new->vrf_id = area->ospf->vrf_id; |
718e3744 | 1188 | |
d62a17ae | 1189 | /* Copy LSA to store. */ |
1190 | new->data = ospf_lsa_data_new(length); | |
1191 | memcpy(new->data, lsah, length); | |
1192 | stream_free(s); | |
718e3744 | 1193 | |
d62a17ae | 1194 | return new; |
718e3744 | 1195 | } |
1196 | ||
1197 | /* Originate Summary-LSA. */ | |
d62a17ae | 1198 | struct ospf_lsa *ospf_summary_lsa_originate(struct prefix_ipv4 *p, |
1199 | u_int32_t metric, | |
1200 | struct ospf_area *area) | |
1201 | { | |
1202 | struct ospf_lsa *new; | |
1203 | struct in_addr id; | |
1204 | ||
1205 | id = ospf_lsa_unique_id(area->ospf, area->lsdb, OSPF_SUMMARY_LSA, p); | |
1206 | ||
1207 | if (id.s_addr == 0xffffffff) { | |
1208 | /* Maybe Link State ID not available. */ | |
1209 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1210 | zlog_debug( | |
1211 | "LSA[Type%d]: Link ID not available, can't originate", | |
1212 | OSPF_SUMMARY_LSA); | |
1213 | return NULL; | |
1214 | } | |
1215 | ||
1216 | /* Create new summary-LSA instance. */ | |
1217 | if (!(new = ospf_summary_lsa_new(area, (struct prefix *)p, metric, id))) | |
1218 | return NULL; | |
1219 | ||
1220 | /* Instlal LSA to LSDB. */ | |
1221 | new = ospf_lsa_install(area->ospf, NULL, new); | |
1222 | ||
1223 | /* Update LSA origination count. */ | |
1224 | area->ospf->lsa_originate_count++; | |
1225 | ||
1226 | /* Flooding new LSA through area. */ | |
1227 | ospf_flood_through_area(area, NULL, new); | |
1228 | ||
1229 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1230 | zlog_debug("LSA[Type%d:%s]: Originate summary-LSA %p", | |
1231 | new->data->type, inet_ntoa(new->data->id), | |
1232 | (void *)new); | |
1233 | ospf_lsa_header_dump(new->data); | |
1234 | } | |
1235 | ||
1236 | return new; | |
1237 | } | |
1238 | ||
1239 | static struct ospf_lsa *ospf_summary_lsa_refresh(struct ospf *ospf, | |
1240 | struct ospf_lsa *lsa) | |
1241 | { | |
1242 | struct ospf_lsa *new; | |
1243 | struct summary_lsa *sl; | |
1244 | struct prefix p; | |
1245 | ||
1246 | /* Sanity check. */ | |
1247 | assert(lsa->data); | |
1248 | ||
1249 | sl = (struct summary_lsa *)lsa->data; | |
1250 | p.prefixlen = ip_masklen(sl->mask); | |
1251 | new = ospf_summary_lsa_new(lsa->area, &p, GET_METRIC(sl->metric), | |
1252 | sl->header.id); | |
1253 | ||
1254 | if (!new) | |
1255 | return NULL; | |
1256 | ||
1257 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
1258 | ||
1259 | ospf_lsa_install(ospf, NULL, new); | |
1260 | ||
1261 | /* Flood LSA through AS. */ | |
1262 | ospf_flood_through_area(new->area, NULL, new); | |
1263 | ||
1264 | /* Debug logging. */ | |
1265 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1266 | zlog_debug("LSA[Type%d:%s]: summary-LSA refresh", | |
1267 | new->data->type, inet_ntoa(new->data->id)); | |
1268 | ospf_lsa_header_dump(new->data); | |
1269 | } | |
1270 | ||
1271 | return new; | |
718e3744 | 1272 | } |
1273 | ||
6b0655a2 | 1274 | |
718e3744 | 1275 | /* summary-ASBR-LSA related functions. */ |
d62a17ae | 1276 | static void ospf_summary_asbr_lsa_body_set(struct stream *s, struct prefix *p, |
1277 | u_int32_t metric) | |
718e3744 | 1278 | { |
d62a17ae | 1279 | /* Put Network Mask. */ |
1280 | stream_put_ipv4(s, (u_int32_t)0); | |
718e3744 | 1281 | |
d62a17ae | 1282 | /* Set # TOS. */ |
1283 | stream_putc(s, (u_char)0); | |
718e3744 | 1284 | |
d62a17ae | 1285 | /* Set metric. */ |
1286 | stream_put_ospf_metric(s, metric); | |
718e3744 | 1287 | } |
1288 | ||
d62a17ae | 1289 | static struct ospf_lsa *ospf_summary_asbr_lsa_new(struct ospf_area *area, |
1290 | struct prefix *p, | |
1291 | u_int32_t metric, | |
1292 | struct in_addr id) | |
718e3744 | 1293 | { |
d62a17ae | 1294 | struct stream *s; |
1295 | struct ospf_lsa *new; | |
1296 | struct lsa_header *lsah; | |
1297 | int length; | |
718e3744 | 1298 | |
d62a17ae | 1299 | if (id.s_addr == 0xffffffff) { |
1300 | /* Maybe Link State ID not available. */ | |
1301 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1302 | zlog_debug( | |
1303 | "LSA[Type%d]: Link ID not available, can't originate", | |
1304 | OSPF_ASBR_SUMMARY_LSA); | |
1305 | return NULL; | |
1306 | } | |
c24d602e | 1307 | |
d62a17ae | 1308 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) |
1309 | zlog_debug("LSA[Type3]: Create summary-LSA instance"); | |
718e3744 | 1310 | |
d62a17ae | 1311 | /* Create new stream for LSA. */ |
1312 | s = stream_new(OSPF_MAX_LSA_SIZE); | |
1313 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
718e3744 | 1314 | |
d62a17ae | 1315 | lsa_header_set(s, LSA_OPTIONS_GET(area), OSPF_ASBR_SUMMARY_LSA, id, |
1316 | area->ospf->router_id); | |
718e3744 | 1317 | |
d62a17ae | 1318 | /* Set summary-LSA body fields. */ |
1319 | ospf_summary_asbr_lsa_body_set(s, p, metric); | |
718e3744 | 1320 | |
d62a17ae | 1321 | /* Set length. */ |
1322 | length = stream_get_endp(s); | |
1323 | lsah->length = htons(length); | |
718e3744 | 1324 | |
d62a17ae | 1325 | /* Create OSPF LSA instance. */ |
1326 | new = ospf_lsa_new(); | |
1327 | new->area = area; | |
1328 | SET_FLAG(new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); | |
b5a8894d | 1329 | new->vrf_id = area->ospf->vrf_id; |
718e3744 | 1330 | |
d62a17ae | 1331 | /* Copy LSA to store. */ |
1332 | new->data = ospf_lsa_data_new(length); | |
1333 | memcpy(new->data, lsah, length); | |
1334 | stream_free(s); | |
718e3744 | 1335 | |
d62a17ae | 1336 | return new; |
718e3744 | 1337 | } |
1338 | ||
1339 | /* Originate summary-ASBR-LSA. */ | |
d62a17ae | 1340 | struct ospf_lsa *ospf_summary_asbr_lsa_originate(struct prefix_ipv4 *p, |
1341 | u_int32_t metric, | |
1342 | struct ospf_area *area) | |
1343 | { | |
1344 | struct ospf_lsa *new; | |
1345 | struct in_addr id; | |
1346 | ||
1347 | id = ospf_lsa_unique_id(area->ospf, area->lsdb, OSPF_ASBR_SUMMARY_LSA, | |
1348 | p); | |
1349 | ||
1350 | if (id.s_addr == 0xffffffff) { | |
1351 | /* Maybe Link State ID not available. */ | |
1352 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1353 | zlog_debug( | |
1354 | "LSA[Type%d]: Link ID not available, can't originate", | |
1355 | OSPF_ASBR_SUMMARY_LSA); | |
1356 | return NULL; | |
1357 | } | |
1358 | ||
1359 | /* Create new summary-LSA instance. */ | |
1360 | new = ospf_summary_asbr_lsa_new(area, (struct prefix *)p, metric, id); | |
1361 | if (!new) | |
1362 | return NULL; | |
1363 | ||
1364 | /* Install LSA to LSDB. */ | |
1365 | new = ospf_lsa_install(area->ospf, NULL, new); | |
718e3744 | 1366 | |
d62a17ae | 1367 | /* Update LSA origination count. */ |
1368 | area->ospf->lsa_originate_count++; | |
718e3744 | 1369 | |
d62a17ae | 1370 | /* Flooding new LSA through area. */ |
1371 | ospf_flood_through_area(area, NULL, new); | |
718e3744 | 1372 | |
d62a17ae | 1373 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { |
1374 | zlog_debug("LSA[Type%d:%s]: Originate summary-ASBR-LSA %p", | |
1375 | new->data->type, inet_ntoa(new->data->id), | |
1376 | (void *)new); | |
1377 | ospf_lsa_header_dump(new->data); | |
1378 | } | |
1379 | ||
1380 | return new; | |
1381 | } | |
1382 | ||
1383 | static struct ospf_lsa *ospf_summary_asbr_lsa_refresh(struct ospf *ospf, | |
1384 | struct ospf_lsa *lsa) | |
1385 | { | |
1386 | struct ospf_lsa *new; | |
1387 | struct summary_lsa *sl; | |
1388 | struct prefix p; | |
1389 | ||
1390 | /* Sanity check. */ | |
1391 | assert(lsa->data); | |
1392 | ||
1393 | sl = (struct summary_lsa *)lsa->data; | |
1394 | p.prefixlen = ip_masklen(sl->mask); | |
1395 | new = ospf_summary_asbr_lsa_new(lsa->area, &p, GET_METRIC(sl->metric), | |
1396 | sl->header.id); | |
1397 | if (!new) | |
1398 | return NULL; | |
1399 | ||
1400 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
1401 | ||
1402 | ospf_lsa_install(ospf, NULL, new); | |
1403 | ||
1404 | /* Flood LSA through area. */ | |
1405 | ospf_flood_through_area(new->area, NULL, new); | |
1406 | ||
1407 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1408 | zlog_debug("LSA[Type%d:%s]: summary-ASBR-LSA refresh", | |
1409 | new->data->type, inet_ntoa(new->data->id)); | |
1410 | ospf_lsa_header_dump(new->data); | |
1411 | } | |
1412 | ||
1413 | return new; | |
718e3744 | 1414 | } |
1415 | ||
1416 | /* AS-external-LSA related functions. */ | |
1417 | ||
1418 | /* Get nexthop for AS-external-LSAs. Return nexthop if its interface | |
1419 | is connected, else 0*/ | |
d62a17ae | 1420 | static struct in_addr ospf_external_lsa_nexthop_get(struct ospf *ospf, |
1421 | struct in_addr nexthop) | |
718e3744 | 1422 | { |
d62a17ae | 1423 | struct in_addr fwd; |
1424 | struct prefix nh; | |
1425 | struct listnode *node; | |
1426 | struct ospf_interface *oi; | |
1427 | ||
1428 | fwd.s_addr = 0; | |
718e3744 | 1429 | |
d62a17ae | 1430 | if (!nexthop.s_addr) |
1431 | return fwd; | |
718e3744 | 1432 | |
d62a17ae | 1433 | /* Check whether nexthop is covered by OSPF network. */ |
1434 | nh.family = AF_INET; | |
1435 | nh.u.prefix4 = nexthop; | |
1436 | nh.prefixlen = IPV4_MAX_BITLEN; | |
718e3744 | 1437 | |
d62a17ae | 1438 | /* XXX/SCALE: If there were a lot of oi's on an ifp, then it'd be |
1439 | * better to make use of the per-ifp table of ois. | |
1440 | */ | |
1441 | for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi)) | |
1442 | if (if_is_operative(oi->ifp)) | |
1443 | if (oi->address->family == AF_INET) | |
1444 | if (prefix_match(oi->address, &nh)) | |
1445 | return nexthop; | |
718e3744 | 1446 | |
d62a17ae | 1447 | return fwd; |
718e3744 | 1448 | } |
1449 | ||
718e3744 | 1450 | /* NSSA-external-LSA related functions. */ |
1451 | ||
1452 | /* Get 1st IP connection for Forward Addr */ | |
4dadc291 | 1453 | |
d62a17ae | 1454 | struct in_addr ospf_get_ip_from_ifp(struct ospf_interface *oi) |
718e3744 | 1455 | { |
d62a17ae | 1456 | struct in_addr fwd; |
718e3744 | 1457 | |
d62a17ae | 1458 | fwd.s_addr = 0; |
718e3744 | 1459 | |
d62a17ae | 1460 | if (if_is_operative(oi->ifp)) |
1461 | return oi->address->u.prefix4; | |
1462 | ||
1463 | return fwd; | |
718e3744 | 1464 | } |
1465 | ||
1466 | /* Get 1st IP connection for Forward Addr */ | |
d62a17ae | 1467 | struct in_addr ospf_get_nssa_ip(struct ospf_area *area) |
1468 | { | |
1469 | struct in_addr fwd; | |
1470 | struct in_addr best_default; | |
1471 | struct listnode *node; | |
1472 | struct ospf_interface *oi; | |
1473 | ||
1474 | fwd.s_addr = 0; | |
1475 | best_default.s_addr = 0; | |
1476 | ||
1477 | for (ALL_LIST_ELEMENTS_RO(area->ospf->oiflist, node, oi)) { | |
1478 | if (if_is_operative(oi->ifp)) | |
1479 | if (oi->area->external_routing == OSPF_AREA_NSSA) | |
1480 | if (oi->address | |
1481 | && oi->address->family == AF_INET) { | |
1482 | if (best_default.s_addr == 0) | |
1483 | best_default = | |
1484 | oi->address->u.prefix4; | |
1485 | if (oi->area == area) | |
1486 | return oi->address->u.prefix4; | |
1487 | } | |
1488 | } | |
1489 | if (best_default.s_addr != 0) | |
1490 | return best_default; | |
718e3744 | 1491 | |
d62a17ae | 1492 | if (best_default.s_addr != 0) |
1493 | return best_default; | |
68980084 | 1494 | |
d62a17ae | 1495 | return fwd; |
718e3744 | 1496 | } |
beebba75 | 1497 | |
718e3744 | 1498 | #define DEFAULT_DEFAULT_METRIC 20 |
1499 | #define DEFAULT_DEFAULT_ORIGINATE_METRIC 10 | |
1500 | #define DEFAULT_DEFAULT_ALWAYS_METRIC 1 | |
1501 | ||
1502 | #define DEFAULT_METRIC_TYPE EXTERNAL_METRIC_TYPE_2 | |
1503 | ||
d62a17ae | 1504 | int metric_type(struct ospf *ospf, u_char src, u_short instance) |
718e3744 | 1505 | { |
d62a17ae | 1506 | struct ospf_redist *red; |
7c8ff89e | 1507 | |
d62a17ae | 1508 | red = ospf_redist_lookup(ospf, src, instance); |
7c8ff89e | 1509 | |
d62a17ae | 1510 | return ((!red || red->dmetric.type < 0) ? DEFAULT_METRIC_TYPE |
1511 | : red->dmetric.type); | |
718e3744 | 1512 | } |
1513 | ||
d62a17ae | 1514 | int metric_value(struct ospf *ospf, u_char src, u_short instance) |
718e3744 | 1515 | { |
d62a17ae | 1516 | struct ospf_redist *red; |
7c8ff89e | 1517 | |
d62a17ae | 1518 | red = ospf_redist_lookup(ospf, src, instance); |
1519 | if (!red || red->dmetric.value < 0) { | |
1520 | if (src == DEFAULT_ROUTE) { | |
1521 | if (ospf->default_originate == DEFAULT_ORIGINATE_ZEBRA) | |
1522 | return DEFAULT_DEFAULT_ORIGINATE_METRIC; | |
1523 | else | |
1524 | return DEFAULT_DEFAULT_ALWAYS_METRIC; | |
1525 | } else if (ospf->default_metric < 0) | |
1526 | return DEFAULT_DEFAULT_METRIC; | |
1527 | else | |
1528 | return ospf->default_metric; | |
718e3744 | 1529 | } |
718e3744 | 1530 | |
d62a17ae | 1531 | return red->dmetric.value; |
718e3744 | 1532 | } |
1533 | ||
1534 | /* Set AS-external-LSA body. */ | |
d62a17ae | 1535 | static void ospf_external_lsa_body_set(struct stream *s, |
1536 | struct external_info *ei, | |
1537 | struct ospf *ospf) | |
1538 | { | |
1539 | struct prefix_ipv4 *p = &ei->p; | |
1540 | struct in_addr mask, fwd_addr; | |
1541 | u_int32_t mvalue; | |
1542 | int mtype; | |
1543 | int type; | |
1544 | u_short instance; | |
1545 | ||
1546 | /* Put Network Mask. */ | |
1547 | masklen2ip(p->prefixlen, &mask); | |
1548 | stream_put_ipv4(s, mask.s_addr); | |
1549 | ||
1550 | /* If prefix is default, specify DEFAULT_ROUTE. */ | |
1551 | type = is_prefix_default(&ei->p) ? DEFAULT_ROUTE : ei->type; | |
1552 | instance = is_prefix_default(&ei->p) ? 0 : ei->instance; | |
1553 | ||
1554 | mtype = (ROUTEMAP_METRIC_TYPE(ei) != -1) | |
1555 | ? ROUTEMAP_METRIC_TYPE(ei) | |
1556 | : metric_type(ospf, type, instance); | |
1557 | ||
1558 | mvalue = (ROUTEMAP_METRIC(ei) != -1) | |
1559 | ? ROUTEMAP_METRIC(ei) | |
1560 | : metric_value(ospf, type, instance); | |
1561 | ||
1562 | /* Put type of external metric. */ | |
1563 | stream_putc(s, (mtype == EXTERNAL_METRIC_TYPE_2 ? 0x80 : 0)); | |
1564 | ||
1565 | /* Put 0 metric. TOS metric is not supported. */ | |
1566 | stream_put_ospf_metric(s, mvalue); | |
1567 | ||
1568 | /* Get forwarding address to nexthop if on the Connection List, else 0. | |
1569 | */ | |
1570 | fwd_addr = ospf_external_lsa_nexthop_get(ospf, ei->nexthop); | |
1571 | ||
1572 | /* Put forwarding address. */ | |
1573 | stream_put_ipv4(s, fwd_addr.s_addr); | |
1574 | ||
1575 | /* Put route tag */ | |
1576 | stream_putl(s, ei->tag); | |
718e3744 | 1577 | } |
1578 | ||
1579 | /* Create new external-LSA. */ | |
d62a17ae | 1580 | static struct ospf_lsa *ospf_external_lsa_new(struct ospf *ospf, |
1581 | struct external_info *ei, | |
1582 | struct in_addr *old_id) | |
1583 | { | |
1584 | struct stream *s; | |
1585 | struct lsa_header *lsah; | |
1586 | struct ospf_lsa *new; | |
1587 | struct in_addr id; | |
1588 | int length; | |
1589 | ||
1590 | if (ei == NULL) { | |
1591 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1592 | zlog_debug( | |
1593 | "LSA[Type5]: External info is NULL, can't originate"); | |
1594 | return NULL; | |
1595 | } | |
1596 | ||
1597 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1598 | zlog_debug("LSA[Type5]: Originate AS-external-LSA instance"); | |
1599 | ||
1600 | /* If old Link State ID is specified, refresh LSA with same ID. */ | |
1601 | if (old_id) | |
1602 | id = *old_id; | |
1603 | /* Get Link State with unique ID. */ | |
1604 | else { | |
1605 | id = ospf_lsa_unique_id(ospf, ospf->lsdb, OSPF_AS_EXTERNAL_LSA, | |
1606 | &ei->p); | |
1607 | if (id.s_addr == 0xffffffff) { | |
1608 | /* Maybe Link State ID not available. */ | |
1609 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1610 | zlog_debug( | |
1611 | "LSA[Type5]: Link ID not available, can't originate"); | |
1612 | return NULL; | |
1613 | } | |
1614 | } | |
1615 | ||
1616 | /* Create new stream for LSA. */ | |
1617 | s = stream_new(OSPF_MAX_LSA_SIZE); | |
1618 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
1619 | ||
1620 | /* Set LSA common header fields. */ | |
1621 | lsa_header_set(s, OSPF_OPTION_E, OSPF_AS_EXTERNAL_LSA, id, | |
1622 | ospf->router_id); | |
1623 | ||
1624 | /* Set AS-external-LSA body fields. */ | |
1625 | ospf_external_lsa_body_set(s, ei, ospf); | |
1626 | ||
1627 | /* Set length. */ | |
1628 | length = stream_get_endp(s); | |
1629 | lsah->length = htons(length); | |
1630 | ||
1631 | /* Now, create OSPF LSA instance. */ | |
1632 | new = ospf_lsa_new(); | |
1633 | new->area = NULL; | |
1634 | SET_FLAG(new->flags, | |
1635 | OSPF_LSA_SELF | OSPF_LSA_APPROVED | OSPF_LSA_SELF_CHECKED); | |
b5a8894d | 1636 | new->vrf_id = ospf->vrf_id; |
d62a17ae | 1637 | |
1638 | /* Copy LSA data to store, discard stream. */ | |
1639 | new->data = ospf_lsa_data_new(length); | |
1640 | memcpy(new->data, lsah, length); | |
1641 | stream_free(s); | |
1642 | ||
1643 | return new; | |
718e3744 | 1644 | } |
1645 | ||
718e3744 | 1646 | /* As Type-7 */ |
d62a17ae | 1647 | static void ospf_install_flood_nssa(struct ospf *ospf, struct ospf_lsa *lsa, |
1648 | struct external_info *ei) | |
1649 | { | |
1650 | struct ospf_lsa *new; | |
1651 | struct as_external_lsa *extlsa; | |
1652 | struct ospf_area *area; | |
1653 | struct listnode *node, *nnode; | |
1654 | ||
1655 | /* LSA may be a Type-5 originated via translation of a Type-7 LSA | |
1656 | * which originated from an NSSA area. In which case it should not be | |
1657 | * flooded back to NSSA areas. | |
1658 | */ | |
1659 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
1660 | return; | |
1661 | ||
1662 | /* NSSA Originate or Refresh (If anyNSSA) | |
1663 | ||
1664 | LSA is self-originated. And just installed as Type-5. | |
1665 | Additionally, install as Type-7 LSDB for every attached NSSA. | |
1666 | ||
1667 | P-Bit controls which ABR performs translation to outside world; If | |
1668 | we are an ABR....do not set the P-bit, because we send the Type-5, | |
1669 | not as the ABR Translator, but as the ASBR owner within the AS! | |
1670 | ||
1671 | If we are NOT ABR, Flood through NSSA as Type-7 w/P-bit set. The | |
1672 | elected ABR Translator will see the P-bit, Translate, and re-flood. | |
1673 | ||
1674 | Later, ABR_TASK and P-bit will scan Type-7 LSDB and translate to | |
1675 | Type-5's to non-NSSA Areas. (it will also attempt a re-install) */ | |
1676 | ||
1677 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { | |
1678 | /* Don't install Type-7 LSA's into nonNSSA area */ | |
1679 | if (area->external_routing != OSPF_AREA_NSSA) | |
1680 | continue; | |
1681 | ||
1682 | /* make lsa duplicate, lock=1 */ | |
1683 | new = ospf_lsa_dup(lsa); | |
1684 | new->area = area; | |
1685 | new->data->type = OSPF_AS_NSSA_LSA; | |
1686 | ||
1687 | /* set P-bit if not ABR */ | |
1688 | if (!IS_OSPF_ABR(ospf)) { | |
1689 | SET_FLAG(new->data->options, OSPF_OPTION_NP); | |
1690 | ||
1691 | /* set non-zero FWD ADDR | |
1692 | ||
1693 | draft-ietf-ospf-nssa-update-09.txt | |
1694 | ||
1695 | if the network between the NSSA AS boundary router and | |
1696 | the | |
1697 | adjacent AS is advertised into OSPF as an internal OSPF | |
1698 | route, | |
1699 | the forwarding address should be the next op address as | |
1700 | is cu | |
1701 | currently done with type-5 LSAs. If the intervening | |
1702 | network is | |
1703 | not adversited into OSPF as an internal OSPF route and | |
1704 | the | |
1705 | type-7 LSA's P-bit is set a forwarding address should be | |
87bd50e8 | 1706 | selected from one of the router's active OSPF interface |
d62a17ae | 1707 | addresses |
1708 | which belong to the NSSA. If no such addresses exist, | |
1709 | then | |
1710 | no type-7 LSA's with the P-bit set should originate from | |
1711 | this | |
1712 | router. */ | |
1713 | ||
1714 | /* kevinm: not updating lsa anymore, just new */ | |
1715 | extlsa = (struct as_external_lsa *)(new->data); | |
1716 | ||
1717 | if (extlsa->e[0].fwd_addr.s_addr == 0) | |
1718 | extlsa->e[0].fwd_addr = ospf_get_nssa_ip( | |
1719 | area); /* this NSSA area in ifp */ | |
1720 | ||
1721 | if (extlsa->e[0].fwd_addr.s_addr == 0) { | |
1722 | if (IS_DEBUG_OSPF_NSSA) | |
1723 | zlog_debug( | |
1724 | "LSA[Type-7]: Could not build FWD-ADDR"); | |
1725 | ospf_lsa_discard(new); | |
1726 | return; | |
1727 | } | |
1728 | } | |
1729 | ||
1730 | /* install also as Type-7 */ | |
1731 | ospf_lsa_install(ospf, NULL, | |
1732 | new); /* Remove Old, Lock New = 2 */ | |
1733 | ||
1734 | /* will send each copy, lock=2+n */ | |
1735 | ospf_flood_through_as( | |
1736 | ospf, NULL, new); /* all attached NSSA's, no AS/STUBs */ | |
1737 | } | |
d4a53d58 | 1738 | } |
1739 | ||
d62a17ae | 1740 | static struct ospf_lsa *ospf_lsa_translated_nssa_new(struct ospf *ospf, |
1741 | struct ospf_lsa *type7) | |
1742 | { | |
1743 | ||
1744 | struct ospf_lsa *new; | |
1745 | struct as_external_lsa *ext, *extnew; | |
1746 | struct external_info ei; | |
1747 | ||
1748 | ext = (struct as_external_lsa *)(type7->data); | |
1749 | ||
1750 | /* need external_info struct, fill in bare minimum */ | |
1751 | ei.p.family = AF_INET; | |
1752 | ei.p.prefix = type7->data->id; | |
1753 | ei.p.prefixlen = ip_masklen(ext->mask); | |
1754 | ei.type = ZEBRA_ROUTE_OSPF; | |
1755 | ei.nexthop = ext->header.adv_router; | |
1756 | ei.route_map_set.metric = -1; | |
1757 | ei.route_map_set.metric_type = -1; | |
1758 | ei.tag = 0; | |
1759 | ||
1760 | if ((new = ospf_external_lsa_new(ospf, &ei, &type7->data->id)) | |
1761 | == NULL) { | |
1762 | if (IS_DEBUG_OSPF_NSSA) | |
1763 | zlog_debug( | |
1764 | "ospf_nssa_translate_originate(): Could not originate " | |
1765 | "Translated Type-5 for %s", | |
1766 | inet_ntoa(ei.p.prefix)); | |
1767 | return NULL; | |
1768 | } | |
1769 | ||
1770 | extnew = (struct as_external_lsa *)(new->data); | |
1771 | ||
1772 | /* copy over Type-7 data to new */ | |
1773 | extnew->e[0].tos = ext->e[0].tos; | |
1774 | extnew->e[0].route_tag = ext->e[0].route_tag; | |
1775 | extnew->e[0].fwd_addr.s_addr = ext->e[0].fwd_addr.s_addr; | |
1776 | new->data->ls_seqnum = type7->data->ls_seqnum; | |
1777 | ||
1778 | /* add translated flag, checksum and lock new lsa */ | |
1779 | SET_FLAG(new->flags, OSPF_LSA_LOCAL_XLT); /* Translated from 7 */ | |
1780 | new = ospf_lsa_lock(new); | |
1781 | ||
1782 | return new; | |
d4a53d58 | 1783 | } |
1784 | ||
d4a53d58 | 1785 | /* Originate Translated Type-5 for supplied Type-7 NSSA LSA */ |
d62a17ae | 1786 | struct ospf_lsa *ospf_translated_nssa_originate(struct ospf *ospf, |
1787 | struct ospf_lsa *type7) | |
1788 | { | |
1789 | struct ospf_lsa *new; | |
1790 | struct as_external_lsa *extnew; | |
1791 | ||
1792 | /* we cant use ospf_external_lsa_originate() as we need to set | |
1793 | * the OSPF_LSA_LOCAL_XLT flag, must originate by hand | |
1794 | */ | |
1795 | ||
1796 | if ((new = ospf_lsa_translated_nssa_new(ospf, type7)) == NULL) { | |
1797 | if (IS_DEBUG_OSPF_NSSA) | |
1798 | zlog_debug( | |
1799 | "ospf_translated_nssa_originate(): Could not translate " | |
1800 | "Type-7, Id %s, to Type-5", | |
1801 | inet_ntoa(type7->data->id)); | |
1802 | return NULL; | |
1803 | } | |
1804 | ||
1805 | extnew = (struct as_external_lsa *)new; | |
1806 | ||
1807 | if (IS_DEBUG_OSPF_NSSA) { | |
1808 | zlog_debug( | |
1809 | "ospf_translated_nssa_originate(): " | |
1810 | "translated Type 7, installed:"); | |
1811 | ospf_lsa_header_dump(new->data); | |
1812 | zlog_debug(" Network mask: %d", ip_masklen(extnew->mask)); | |
1813 | zlog_debug(" Forward addr: %s", | |
1814 | inet_ntoa(extnew->e[0].fwd_addr)); | |
1815 | } | |
1816 | ||
1817 | if ((new = ospf_lsa_install(ospf, NULL, new)) == NULL) { | |
1818 | if (IS_DEBUG_OSPF_NSSA) | |
1819 | zlog_debug( | |
1820 | "ospf_lsa_translated_nssa_originate(): " | |
1821 | "Could not install LSA " | |
1822 | "id %s", | |
1823 | inet_ntoa(type7->data->id)); | |
1824 | return NULL; | |
1825 | } | |
1826 | ||
1827 | ospf->lsa_originate_count++; | |
1828 | ospf_flood_through_as(ospf, NULL, new); | |
1829 | ||
1830 | return new; | |
d4a53d58 | 1831 | } |
1832 | ||
1833 | /* Refresh Translated from NSSA AS-external-LSA. */ | |
d62a17ae | 1834 | struct ospf_lsa *ospf_translated_nssa_refresh(struct ospf *ospf, |
1835 | struct ospf_lsa *type7, | |
1836 | struct ospf_lsa *type5) | |
1837 | { | |
1838 | struct ospf_lsa *new = NULL; | |
1839 | ||
1840 | /* Sanity checks. */ | |
1841 | assert(type7 || type5); | |
1842 | if (!(type7 || type5)) | |
1843 | return NULL; | |
1844 | if (type7) | |
1845 | assert(type7->data); | |
1846 | if (type5) | |
1847 | assert(type5->data); | |
1848 | assert(ospf->anyNSSA); | |
1849 | ||
1850 | /* get required data according to what has been given */ | |
1851 | if (type7 && type5 == NULL) { | |
1852 | /* find the translated Type-5 for this Type-7 */ | |
1853 | struct as_external_lsa *ext = | |
1854 | (struct as_external_lsa *)(type7->data); | |
1855 | struct prefix_ipv4 p = { | |
1856 | .prefix = type7->data->id, | |
1857 | .prefixlen = ip_masklen(ext->mask), | |
1858 | .family = AF_INET, | |
1859 | }; | |
1860 | ||
1861 | type5 = ospf_external_info_find_lsa(ospf, &p); | |
1862 | } else if (type5 && type7 == NULL) { | |
1863 | /* find the type-7 from which supplied type-5 was translated, | |
1864 | * ie find first type-7 with same LSA Id. | |
1865 | */ | |
1866 | struct listnode *ln, *lnn; | |
1867 | struct route_node *rn; | |
1868 | struct ospf_lsa *lsa; | |
1869 | struct ospf_area *area; | |
1870 | ||
1871 | for (ALL_LIST_ELEMENTS(ospf->areas, ln, lnn, area)) { | |
1872 | if (area->external_routing != OSPF_AREA_NSSA && !type7) | |
1873 | continue; | |
1874 | ||
044506e7 | 1875 | LSDB_LOOP (NSSA_LSDB(area), rn, lsa) { |
d62a17ae | 1876 | if (lsa->data->id.s_addr |
1877 | == type5->data->id.s_addr) { | |
1878 | type7 = lsa; | |
1879 | break; | |
1880 | } | |
1881 | } | |
1882 | } | |
1883 | } | |
1884 | ||
1885 | /* do we have type7? */ | |
1886 | if (!type7) { | |
1887 | if (IS_DEBUG_OSPF_NSSA) | |
1888 | zlog_debug( | |
1889 | "ospf_translated_nssa_refresh(): no Type-7 found for " | |
1890 | "Type-5 LSA Id %s", | |
1891 | inet_ntoa(type5->data->id)); | |
1892 | return NULL; | |
1893 | } | |
1894 | ||
1895 | /* do we have valid translated type5? */ | |
1896 | if (type5 == NULL || !CHECK_FLAG(type5->flags, OSPF_LSA_LOCAL_XLT)) { | |
1897 | if (IS_DEBUG_OSPF_NSSA) | |
1898 | zlog_debug( | |
1899 | "ospf_translated_nssa_refresh(): No translated Type-5 " | |
1900 | "found for Type-7 with Id %s", | |
1901 | inet_ntoa(type7->data->id)); | |
1902 | return NULL; | |
1903 | } | |
1904 | ||
1905 | /* Delete LSA from neighbor retransmit-list. */ | |
1906 | ospf_ls_retransmit_delete_nbr_as(ospf, type5); | |
1907 | ||
1908 | /* create new translated LSA */ | |
1909 | if ((new = ospf_lsa_translated_nssa_new(ospf, type7)) == NULL) { | |
1910 | if (IS_DEBUG_OSPF_NSSA) | |
1911 | zlog_debug( | |
1912 | "ospf_translated_nssa_refresh(): Could not translate " | |
1913 | "Type-7 for %s to Type-5", | |
1914 | inet_ntoa(type7->data->id)); | |
1915 | return NULL; | |
1916 | } | |
1917 | ||
1918 | if (!(new = ospf_lsa_install(ospf, NULL, new))) { | |
1919 | if (IS_DEBUG_OSPF_NSSA) | |
1920 | zlog_debug( | |
1921 | "ospf_translated_nssa_refresh(): Could not install " | |
1922 | "translated LSA, Id %s", | |
1923 | inet_ntoa(type7->data->id)); | |
1924 | return NULL; | |
1925 | } | |
1926 | ||
1927 | /* Flood LSA through area. */ | |
1928 | ospf_flood_through_as(ospf, NULL, new); | |
1929 | ||
1930 | return new; | |
1931 | } | |
1932 | ||
1933 | int is_prefix_default(struct prefix_ipv4 *p) | |
1934 | { | |
1935 | struct prefix_ipv4 q; | |
1936 | ||
1937 | q.family = AF_INET; | |
1938 | q.prefix.s_addr = 0; | |
1939 | q.prefixlen = 0; | |
1940 | ||
1941 | return prefix_same((struct prefix *)p, (struct prefix *)&q); | |
718e3744 | 1942 | } |
1943 | ||
1944 | /* Originate an AS-external-LSA, install and flood. */ | |
d62a17ae | 1945 | struct ospf_lsa *ospf_external_lsa_originate(struct ospf *ospf, |
1946 | struct external_info *ei) | |
1947 | { | |
1948 | struct ospf_lsa *new; | |
1949 | ||
1950 | /* Added for NSSA project.... | |
1951 | ||
1952 | External LSAs are originated in ASBRs as usual, but for NSSA | |
1953 | systems. | |
1954 | there is the global Type-5 LSDB and a Type-7 LSDB installed for | |
1955 | every area. The Type-7's are flooded to every IR and every ABR; We | |
1956 | install the Type-5 LSDB so that the normal "refresh" code operates | |
1957 | as usual, and flag them as not used during ASE calculations. The | |
1958 | Type-7 LSDB is used for calculations. Each Type-7 has a Forwarding | |
1959 | Address of non-zero. | |
1960 | ||
1961 | If an ABR is the elected NSSA translator, following SPF and during | |
1962 | the ABR task it will translate all the scanned Type-7's, with P-bit | |
1963 | ON and not-self generated, and translate to Type-5's throughout the | |
1964 | non-NSSA/STUB AS. | |
1965 | ||
1966 | A difference in operation depends whether this ASBR is an ABR | |
1967 | or not. If not an ABR, the P-bit is ON, to indicate that any | |
1968 | elected NSSA-ABR can perform its translation. | |
1969 | ||
1970 | If an ABR, the P-bit is OFF; No ABR will perform translation and | |
1971 | this ASBR will flood the Type-5 LSA as usual. | |
1972 | ||
1973 | For the case where this ASBR is not an ABR, the ASE calculations | |
1974 | are based on the Type-5 LSDB; The Type-7 LSDB exists just to | |
1975 | demonstrate to the user that there are LSA's that belong to any | |
1976 | attached NSSA. | |
1977 | ||
1978 | Finally, it just so happens that when the ABR is translating every | |
1979 | Type-7 into Type-5, it installs it into the Type-5 LSDB as an | |
1980 | approved Type-5 (translated from Type-7); at the end of translation | |
1981 | if any Translated Type-5's remain unapproved, then they must be | |
1982 | flushed from the AS. | |
1983 | ||
1984 | */ | |
1985 | ||
1986 | /* Check the AS-external-LSA should be originated. */ | |
1987 | if (!ospf_redistribute_check(ospf, ei, NULL)) | |
1988 | return NULL; | |
1989 | ||
1990 | /* Create new AS-external-LSA instance. */ | |
1991 | if ((new = ospf_external_lsa_new(ospf, ei, NULL)) == NULL) { | |
1992 | if (IS_DEBUG_OSPF_EVENT) | |
1993 | zlog_debug( | |
1994 | "LSA[Type5:%s]: Could not originate AS-external-LSA", | |
1995 | inet_ntoa(ei->p.prefix)); | |
1996 | return NULL; | |
1997 | } | |
1998 | ||
1999 | /* Install newly created LSA into Type-5 LSDB, lock = 1. */ | |
2000 | ospf_lsa_install(ospf, NULL, new); | |
2001 | ||
2002 | /* Update LSA origination count. */ | |
2003 | ospf->lsa_originate_count++; | |
2004 | ||
2005 | /* Flooding new LSA. only to AS (non-NSSA/STUB) */ | |
2006 | ospf_flood_through_as(ospf, NULL, new); | |
2007 | ||
2008 | /* If there is any attached NSSA, do special handling */ | |
2009 | if (ospf->anyNSSA && | |
2010 | /* stay away from translated LSAs! */ | |
2011 | !(CHECK_FLAG(new->flags, OSPF_LSA_LOCAL_XLT))) | |
2012 | ospf_install_flood_nssa( | |
2013 | ospf, new, ei); /* Install/Flood Type-7 to all NSSAs */ | |
2014 | ||
2015 | /* Debug logging. */ | |
2016 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
2017 | zlog_debug("LSA[Type%d:%s]: Originate AS-external-LSA %p", | |
2018 | new->data->type, inet_ntoa(new->data->id), | |
2019 | (void *)new); | |
2020 | ospf_lsa_header_dump(new->data); | |
2021 | } | |
2022 | ||
2023 | return new; | |
718e3744 | 2024 | } |
2025 | ||
2026 | /* Originate AS-external-LSA from external info with initial flag. */ | |
d62a17ae | 2027 | int ospf_external_lsa_originate_timer(struct thread *thread) |
2028 | { | |
2029 | struct ospf *ospf = THREAD_ARG(thread); | |
2030 | struct route_node *rn; | |
2031 | struct external_info *ei; | |
2032 | struct route_table *rt; | |
2033 | int type = THREAD_VAL(thread); | |
2034 | struct list *ext_list; | |
2035 | struct listnode *node; | |
2036 | struct ospf_external *ext; | |
2037 | ||
2038 | ospf->t_external_lsa = NULL; | |
2039 | ||
de1ac5fd | 2040 | ext_list = ospf->external[type]; |
d62a17ae | 2041 | if (!ext_list) |
2042 | return 0; | |
2043 | ||
2044 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) | |
2045 | /* Originate As-external-LSA from all type of distribute source. | |
2046 | */ | |
2047 | if ((rt = ext->external_info)) | |
2048 | for (rn = route_top(rt); rn; rn = route_next(rn)) | |
2049 | if ((ei = rn->info) != NULL) | |
2050 | if (!is_prefix_default( | |
2051 | (struct prefix_ipv4 *)&ei | |
2052 | ->p)) | |
2053 | if (!ospf_external_lsa_originate( | |
2054 | ospf, ei)) | |
2055 | zlog_warn( | |
2056 | "LSA: AS-external-LSA was not originated."); | |
2057 | ||
2058 | return 0; | |
2059 | } | |
2060 | ||
2061 | static struct external_info *ospf_default_external_info(struct ospf *ospf) | |
2062 | { | |
2063 | int type; | |
2064 | struct route_node *rn; | |
2065 | struct prefix_ipv4 p; | |
2066 | ||
2067 | p.family = AF_INET; | |
2068 | p.prefix.s_addr = 0; | |
2069 | p.prefixlen = 0; | |
2070 | ||
2071 | /* First, lookup redistributed default route. */ | |
2072 | for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) { | |
2073 | struct list *ext_list; | |
2074 | struct listnode *node; | |
2075 | struct ospf_external *ext; | |
2076 | ||
2077 | if (type == ZEBRA_ROUTE_OSPF) | |
2078 | continue; | |
2079 | ||
de1ac5fd | 2080 | ext_list = ospf->external[type]; |
d62a17ae | 2081 | if (!ext_list) |
2082 | continue; | |
2083 | ||
2084 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) { | |
2085 | rn = route_node_lookup(ext->external_info, | |
2086 | (struct prefix *)&p); | |
2087 | if (rn != NULL) { | |
2088 | route_unlock_node(rn); | |
2089 | assert(rn->info); | |
2090 | if (ospf_redistribute_check(ospf, rn->info, | |
2091 | NULL)) | |
2092 | return rn->info; | |
2093 | } | |
2094 | } | |
2095 | } | |
2096 | ||
2097 | return NULL; | |
2098 | } | |
2099 | ||
2100 | int ospf_default_originate_timer(struct thread *thread) | |
2101 | { | |
2102 | struct prefix_ipv4 p; | |
2103 | struct in_addr nexthop; | |
2104 | struct external_info *ei; | |
2105 | struct ospf *ospf; | |
2106 | ||
2107 | ospf = THREAD_ARG(thread); | |
2108 | ||
2109 | p.family = AF_INET; | |
2110 | p.prefix.s_addr = 0; | |
2111 | p.prefixlen = 0; | |
2112 | ||
2113 | if (ospf->default_originate == DEFAULT_ORIGINATE_ALWAYS) { | |
2114 | /* If there is no default route via redistribute, | |
2115 | then originate AS-external-LSA with nexthop 0 (self). */ | |
2116 | nexthop.s_addr = 0; | |
de1ac5fd CS |
2117 | ospf_external_info_add(ospf, DEFAULT_ROUTE, 0, p, 0, |
2118 | nexthop, 0); | |
d62a17ae | 2119 | } |
2120 | ||
2121 | if ((ei = ospf_default_external_info(ospf))) | |
2122 | ospf_external_lsa_originate(ospf, ei); | |
2123 | ||
2124 | return 0; | |
718e3744 | 2125 | } |
2126 | ||
645878f1 | 2127 | /* Flush any NSSA LSAs for given prefix */ |
d62a17ae | 2128 | void ospf_nssa_lsa_flush(struct ospf *ospf, struct prefix_ipv4 *p) |
2129 | { | |
2130 | struct listnode *node, *nnode; | |
b5a8894d | 2131 | struct ospf_lsa *lsa = NULL; |
d62a17ae | 2132 | struct ospf_area *area; |
2133 | ||
2134 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { | |
2135 | if (area->external_routing == OSPF_AREA_NSSA) { | |
b5a8894d CS |
2136 | lsa = ospf_lsa_lookup(ospf, area, |
2137 | OSPF_AS_NSSA_LSA, p->prefix, | |
2138 | ospf->router_id); | |
2139 | if (!lsa) { | |
d62a17ae | 2140 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) |
2141 | zlog_debug( | |
2142 | "LSA: There is no such AS-NSSA-LSA %s/%d in LSDB", | |
2143 | inet_ntoa(p->prefix), | |
2144 | p->prefixlen); | |
2145 | continue; | |
2146 | } | |
2147 | ospf_ls_retransmit_delete_nbr_area(area, lsa); | |
2148 | if (!IS_LSA_MAXAGE(lsa)) { | |
2149 | ospf_refresher_unregister_lsa(ospf, lsa); | |
2150 | ospf_lsa_flush_area(lsa, area); | |
2151 | } | |
2152 | } | |
2153 | } | |
645878f1 | 2154 | } |
645878f1 | 2155 | |
718e3744 | 2156 | /* Flush an AS-external-LSA from LSDB and routing domain. */ |
d62a17ae | 2157 | void ospf_external_lsa_flush(struct ospf *ospf, u_char type, |
2158 | struct prefix_ipv4 *p, | |
2159 | ifindex_t ifindex /*, struct in_addr nexthop */) | |
2160 | { | |
2161 | struct ospf_lsa *lsa; | |
2162 | ||
2163 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2164 | zlog_debug("LSA: Flushing AS-external-LSA %s/%d", | |
2165 | inet_ntoa(p->prefix), p->prefixlen); | |
2166 | ||
2167 | /* First lookup LSA from LSDB. */ | |
2168 | if (!(lsa = ospf_external_info_find_lsa(ospf, p))) { | |
2169 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2170 | zlog_debug( | |
2171 | "LSA: There is no such AS-external-LSA %s/%d in LSDB", | |
2172 | inet_ntoa(p->prefix), p->prefixlen); | |
2173 | return; | |
2174 | } | |
2175 | ||
2176 | /* If LSA is selforiginated, not a translated LSA, and there is | |
2177 | * NSSA area, flush Type-7 LSA's at first. | |
2178 | */ | |
2179 | if (IS_LSA_SELF(lsa) && (ospf->anyNSSA) | |
2180 | && !(CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT))) | |
2181 | ospf_nssa_lsa_flush(ospf, p); | |
2182 | ||
2183 | /* Sweep LSA from Link State Retransmit List. */ | |
2184 | ospf_ls_retransmit_delete_nbr_as(ospf, lsa); | |
2185 | ||
2186 | /* There must be no self-originated LSA in rtrs_external. */ | |
718e3744 | 2187 | #if 0 |
2188 | /* Remove External route from Zebra. */ | |
2189 | ospf_zebra_delete ((struct prefix_ipv4 *) p, &nexthop); | |
2190 | #endif | |
2191 | ||
d62a17ae | 2192 | if (!IS_LSA_MAXAGE(lsa)) { |
2193 | /* Unregister LSA from Refresh queue. */ | |
2194 | ospf_refresher_unregister_lsa(ospf, lsa); | |
2195 | ||
2196 | /* Flush AS-external-LSA through AS. */ | |
2197 | ospf_lsa_flush_as(ospf, lsa); | |
2198 | } | |
2199 | ||
2200 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2201 | zlog_debug("ospf_external_lsa_flush(): stop"); | |
2202 | } | |
2203 | ||
2204 | void ospf_external_lsa_refresh_default(struct ospf *ospf) | |
2205 | { | |
2206 | struct prefix_ipv4 p; | |
2207 | struct external_info *ei; | |
2208 | struct ospf_lsa *lsa; | |
2209 | ||
2210 | p.family = AF_INET; | |
2211 | p.prefixlen = 0; | |
2212 | p.prefix.s_addr = 0; | |
2213 | ||
2214 | ei = ospf_default_external_info(ospf); | |
2215 | lsa = ospf_external_info_find_lsa(ospf, &p); | |
2216 | ||
2217 | if (ei) { | |
2218 | if (lsa) { | |
2219 | if (IS_DEBUG_OSPF_EVENT) | |
2220 | zlog_debug( | |
2221 | "LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p", | |
2222 | (void *)lsa); | |
2223 | ospf_external_lsa_refresh(ospf, lsa, ei, | |
2224 | LSA_REFRESH_FORCE); | |
2225 | } else { | |
2226 | if (IS_DEBUG_OSPF_EVENT) | |
2227 | zlog_debug( | |
2228 | "LSA[Type5:0.0.0.0]: Originate AS-external-LSA"); | |
2229 | ospf_external_lsa_originate(ospf, ei); | |
2230 | } | |
2231 | } else { | |
2232 | if (lsa) { | |
2233 | if (IS_DEBUG_OSPF_EVENT) | |
2234 | zlog_debug( | |
2235 | "LSA[Type5:0.0.0.0]: Flush AS-external-LSA"); | |
2236 | ospf_refresher_unregister_lsa(ospf, lsa); | |
2237 | ospf_lsa_flush_as(ospf, lsa); | |
2238 | } | |
2239 | } | |
2240 | } | |
2241 | ||
2242 | void ospf_external_lsa_refresh_type(struct ospf *ospf, u_char type, | |
2243 | u_short instance, int force) | |
2244 | { | |
2245 | struct route_node *rn; | |
2246 | struct external_info *ei; | |
2247 | struct ospf_external *ext; | |
2248 | ||
de1ac5fd CS |
2249 | if (type == DEFAULT_ROUTE) |
2250 | return; | |
2251 | ||
2252 | ext = ospf_external_lookup(ospf, type, instance); | |
2253 | ||
2254 | if (ext && EXTERNAL_INFO(ext)) { | |
2255 | /* Refresh each redistributed AS-external-LSAs. */ | |
2256 | for (rn = route_top(EXTERNAL_INFO(ext)); rn; | |
2257 | rn = route_next(rn)) { | |
2258 | ei = rn->info; | |
2259 | if (ei) { | |
2260 | if (!is_prefix_default(&ei->p)) { | |
2261 | struct ospf_lsa *lsa; | |
2262 | ||
2263 | lsa = ospf_external_info_find_lsa(ospf, | |
2264 | &ei->p); | |
2265 | if (lsa) | |
2266 | ospf_external_lsa_refresh(ospf, | |
2267 | lsa, ei, force); | |
2268 | else | |
2269 | ospf_external_lsa_originate(ospf | |
2270 | , ei); | |
2271 | } | |
2272 | } | |
2273 | } | |
2274 | } | |
718e3744 | 2275 | } |
2276 | ||
2277 | /* Refresh AS-external-LSA. */ | |
d62a17ae | 2278 | struct ospf_lsa *ospf_external_lsa_refresh(struct ospf *ospf, |
2279 | struct ospf_lsa *lsa, | |
2280 | struct external_info *ei, int force) | |
2281 | { | |
2282 | struct ospf_lsa *new; | |
2283 | int changed; | |
2284 | ||
2285 | /* Check the AS-external-LSA should be originated. */ | |
2286 | if (!ospf_redistribute_check(ospf, ei, &changed)) { | |
2287 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
2288 | zlog_debug( | |
2289 | "LSA[Type%d:%s]: Could not be refreshed, " | |
2290 | "redist check fail", | |
2291 | lsa->data->type, inet_ntoa(lsa->data->id)); | |
2292 | ospf_external_lsa_flush(ospf, ei->type, &ei->p, | |
2293 | ei->ifindex /*, ei->nexthop */); | |
2294 | return NULL; | |
2295 | } | |
2296 | ||
2297 | if (!changed && !force) { | |
2298 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
2299 | zlog_debug( | |
2300 | "LSA[Type%d:%s]: Not refreshed, not changed/forced", | |
2301 | lsa->data->type, inet_ntoa(lsa->data->id)); | |
2302 | return NULL; | |
2303 | } | |
2304 | ||
2305 | /* Delete LSA from neighbor retransmit-list. */ | |
2306 | ospf_ls_retransmit_delete_nbr_as(ospf, lsa); | |
2307 | ||
2308 | /* Unregister AS-external-LSA from refresh-list. */ | |
2309 | ospf_refresher_unregister_lsa(ospf, lsa); | |
2310 | ||
2311 | new = ospf_external_lsa_new(ospf, ei, &lsa->data->id); | |
2312 | ||
2313 | if (new == NULL) { | |
2314 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
2315 | zlog_debug("LSA[Type%d:%s]: Could not be refreshed", | |
2316 | lsa->data->type, inet_ntoa(lsa->data->id)); | |
2317 | return NULL; | |
2318 | } | |
2319 | ||
2320 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
2321 | ||
2322 | ospf_lsa_install(ospf, NULL, new); /* As type-5. */ | |
2323 | ||
2324 | /* Flood LSA through AS. */ | |
2325 | ospf_flood_through_as(ospf, NULL, new); | |
2326 | ||
2327 | /* If any attached NSSA, install as Type-7, flood to all NSSA Areas */ | |
2328 | if (ospf->anyNSSA && !(CHECK_FLAG(new->flags, OSPF_LSA_LOCAL_XLT))) | |
2329 | ospf_install_flood_nssa(ospf, new, | |
2330 | ei); /* Install/Flood per new rules */ | |
2331 | ||
2332 | /* Register self-originated LSA to refresh queue. | |
2333 | * Translated LSAs should not be registered, but refreshed upon | |
2334 | * refresh of the Type-7 | |
2335 | */ | |
2336 | if (!CHECK_FLAG(new->flags, OSPF_LSA_LOCAL_XLT)) | |
2337 | ospf_refresher_register_lsa(ospf, new); | |
2338 | ||
2339 | /* Debug logging. */ | |
2340 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
2341 | zlog_debug("LSA[Type%d:%s]: AS-external-LSA refresh", | |
2342 | new->data->type, inet_ntoa(new->data->id)); | |
2343 | ospf_lsa_header_dump(new->data); | |
2344 | } | |
2345 | ||
2346 | return new; | |
718e3744 | 2347 | } |
2348 | ||
6b0655a2 | 2349 | |
718e3744 | 2350 | /* LSA installation functions. */ |
2351 | ||
2352 | /* Install router-LSA to an area. */ | |
4dadc291 | 2353 | static struct ospf_lsa * |
d62a17ae | 2354 | ospf_router_lsa_install(struct ospf *ospf, struct ospf_lsa *new, int rt_recalc) |
718e3744 | 2355 | { |
d62a17ae | 2356 | struct ospf_area *area = new->area; |
718e3744 | 2357 | |
d62a17ae | 2358 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs |
2359 | The entire routing table must be recalculated, starting with | |
2360 | the shortest path calculations for each area (not just the | |
2361 | area whose link-state database has changed). | |
2362 | */ | |
718e3744 | 2363 | |
d62a17ae | 2364 | if (IS_LSA_SELF(new)) { |
5996e0df | 2365 | |
d62a17ae | 2366 | /* Only install LSA if it is originated/refreshed by us. |
2367 | * If LSA was received by flooding, the RECEIVED flag is set so | |
2368 | * do | |
2369 | * not link the LSA */ | |
2370 | if (CHECK_FLAG(new->flags, OSPF_LSA_RECEIVED)) | |
2371 | return new; /* ignore stale LSA */ | |
5996e0df | 2372 | |
d62a17ae | 2373 | /* Set self-originated router-LSA. */ |
2374 | ospf_lsa_unlock(&area->router_lsa_self); | |
2375 | area->router_lsa_self = ospf_lsa_lock(new); | |
718e3744 | 2376 | |
d62a17ae | 2377 | ospf_refresher_register_lsa(ospf, new); |
2378 | } | |
2379 | if (rt_recalc) | |
2380 | ospf_spf_calculate_schedule(ospf, SPF_FLAG_ROUTER_LSA_INSTALL); | |
2381 | return new; | |
718e3744 | 2382 | } |
2383 | ||
d62a17ae | 2384 | #define OSPF_INTERFACE_TIMER_ON(T, F, V) \ |
2385 | if (!(T)) \ | |
2386 | (T) = thread_add_timer(master, (F), oi, (V)) | |
718e3744 | 2387 | |
2388 | /* Install network-LSA to an area. */ | |
d62a17ae | 2389 | static struct ospf_lsa *ospf_network_lsa_install(struct ospf *ospf, |
2390 | struct ospf_interface *oi, | |
2391 | struct ospf_lsa *new, | |
2392 | int rt_recalc) | |
2393 | { | |
2394 | ||
2395 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2396 | The entire routing table must be recalculated, starting with | |
2397 | the shortest path calculations for each area (not just the | |
2398 | area whose link-state database has changed). | |
2399 | */ | |
2400 | if (IS_LSA_SELF(new)) { | |
2401 | /* We supposed that when LSA is originated by us, we pass the | |
2402 | int | |
2403 | for which it was originated. If LSA was received by flooding, | |
2404 | the RECEIVED flag is set, so we do not link the LSA to the | |
2405 | int. */ | |
2406 | if (CHECK_FLAG(new->flags, OSPF_LSA_RECEIVED)) | |
2407 | return new; /* ignore stale LSA */ | |
2408 | ||
2409 | ospf_lsa_unlock(&oi->network_lsa_self); | |
2410 | oi->network_lsa_self = ospf_lsa_lock(new); | |
2411 | ospf_refresher_register_lsa(ospf, new); | |
2412 | } | |
2413 | if (rt_recalc) | |
2414 | ospf_spf_calculate_schedule(ospf, SPF_FLAG_NETWORK_LSA_INSTALL); | |
2415 | ||
2416 | return new; | |
718e3744 | 2417 | } |
2418 | ||
2419 | /* Install summary-LSA to an area. */ | |
4dadc291 | 2420 | static struct ospf_lsa * |
d62a17ae | 2421 | ospf_summary_lsa_install(struct ospf *ospf, struct ospf_lsa *new, int rt_recalc) |
2422 | { | |
2423 | if (rt_recalc && !IS_LSA_SELF(new)) { | |
2424 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2425 | The best route to the destination described by the summary- | |
2426 | LSA must be recalculated (see Section 16.5). If this | |
2427 | destination is an AS boundary router, it may also be | |
2428 | necessary to re-examine all the AS-external-LSAs. | |
2429 | */ | |
718e3744 | 2430 | |
2431 | #if 0 | |
2432 | /* This doesn't exist yet... */ | |
2433 | ospf_summary_incremental_update(new); */ | |
d62a17ae | 2434 | #else /* #if 0 */ |
2435 | ospf_spf_calculate_schedule(ospf, SPF_FLAG_SUMMARY_LSA_INSTALL); | |
718e3744 | 2436 | #endif /* #if 0 */ |
d62a17ae | 2437 | } |
718e3744 | 2438 | |
d62a17ae | 2439 | if (IS_LSA_SELF(new)) |
2440 | ospf_refresher_register_lsa(ospf, new); | |
718e3744 | 2441 | |
d62a17ae | 2442 | return new; |
718e3744 | 2443 | } |
2444 | ||
2445 | /* Install ASBR-summary-LSA to an area. */ | |
d62a17ae | 2446 | static struct ospf_lsa *ospf_summary_asbr_lsa_install(struct ospf *ospf, |
2447 | struct ospf_lsa *new, | |
2448 | int rt_recalc) | |
2449 | { | |
2450 | if (rt_recalc && !IS_LSA_SELF(new)) { | |
2451 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2452 | The best route to the destination described by the summary- | |
2453 | LSA must be recalculated (see Section 16.5). If this | |
2454 | destination is an AS boundary router, it may also be | |
2455 | necessary to re-examine all the AS-external-LSAs. | |
2456 | */ | |
718e3744 | 2457 | #if 0 |
2458 | /* These don't exist yet... */ | |
2459 | ospf_summary_incremental_update(new); | |
2460 | /* Isn't this done by the above call? | |
2461 | - RFC 2328 Section 16.5 implies it should be */ | |
2462 | /* ospf_ase_calculate_schedule(); */ | |
2463 | #else /* #if 0 */ | |
d62a17ae | 2464 | ospf_spf_calculate_schedule(ospf, |
2465 | SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL); | |
718e3744 | 2466 | #endif /* #if 0 */ |
d62a17ae | 2467 | } |
718e3744 | 2468 | |
d62a17ae | 2469 | /* register LSA to refresh-list. */ |
2470 | if (IS_LSA_SELF(new)) | |
2471 | ospf_refresher_register_lsa(ospf, new); | |
718e3744 | 2472 | |
d62a17ae | 2473 | return new; |
718e3744 | 2474 | } |
2475 | ||
2476 | /* Install AS-external-LSA. */ | |
d62a17ae | 2477 | static struct ospf_lsa *ospf_external_lsa_install(struct ospf *ospf, |
2478 | struct ospf_lsa *new, | |
2479 | int rt_recalc) | |
2480 | { | |
2481 | ospf_ase_register_external_lsa(new, ospf); | |
2482 | /* If LSA is not self-originated, calculate an external route. */ | |
2483 | if (rt_recalc) { | |
2484 | /* RFC 2328 Section 13.2 AS-external-LSAs | |
2485 | The best route to the destination described by the AS- | |
2486 | external-LSA must be recalculated (see Section 16.6). | |
2487 | */ | |
2488 | ||
2489 | if (!IS_LSA_SELF(new)) | |
2490 | ospf_ase_incremental_update(ospf, new); | |
2491 | } | |
2492 | ||
2493 | if (new->data->type == OSPF_AS_NSSA_LSA) { | |
2494 | /* There is no point to register selforiginate Type-7 LSA for | |
2495 | * refreshing. We rely on refreshing Type-5 LSA's | |
2496 | */ | |
2497 | if (IS_LSA_SELF(new)) | |
2498 | return new; | |
2499 | else { | |
2500 | /* Try refresh type-5 translated LSA for this LSA, if | |
2501 | * one exists. | |
2502 | * New translations will be taken care of by the | |
2503 | * abr_task. | |
2504 | */ | |
2505 | ospf_translated_nssa_refresh(ospf, new, NULL); | |
493472ba | 2506 | ospf_schedule_abr_task(ospf); |
d62a17ae | 2507 | } |
2508 | } | |
2509 | ||
2510 | /* Register self-originated LSA to refresh queue. | |
2511 | * Leave Translated LSAs alone if NSSA is enabled | |
2512 | */ | |
2513 | if (IS_LSA_SELF(new) && !CHECK_FLAG(new->flags, OSPF_LSA_LOCAL_XLT)) | |
2514 | ospf_refresher_register_lsa(ospf, new); | |
2515 | ||
2516 | return new; | |
2517 | } | |
2518 | ||
2519 | void ospf_discard_from_db(struct ospf *ospf, struct ospf_lsdb *lsdb, | |
2520 | struct ospf_lsa *lsa) | |
2521 | { | |
2522 | struct ospf_lsa *old; | |
2523 | ||
2524 | if (!lsdb) { | |
2525 | zlog_warn("%s: Called with NULL lsdb!", __func__); | |
2526 | if (!lsa) | |
2527 | zlog_warn("%s: and NULL LSA!", __func__); | |
2528 | else | |
2529 | zlog_warn("LSA[Type%d:%s]: not associated with LSDB!", | |
2530 | lsa->data->type, inet_ntoa(lsa->data->id)); | |
2531 | return; | |
2532 | } | |
2533 | ||
2534 | old = ospf_lsdb_lookup(lsdb, lsa); | |
2535 | ||
2536 | if (!old) | |
2537 | return; | |
2538 | ||
2539 | if (old->refresh_list >= 0) | |
2540 | ospf_refresher_unregister_lsa(ospf, old); | |
2541 | ||
2542 | switch (old->data->type) { | |
2543 | case OSPF_AS_EXTERNAL_LSA: | |
2544 | ospf_ase_unregister_external_lsa(old, ospf); | |
2545 | ospf_ls_retransmit_delete_nbr_as(ospf, old); | |
2546 | break; | |
2547 | case OSPF_OPAQUE_AS_LSA: | |
2548 | ospf_ls_retransmit_delete_nbr_as(ospf, old); | |
2549 | break; | |
2550 | case OSPF_AS_NSSA_LSA: | |
2551 | ospf_ls_retransmit_delete_nbr_area(old->area, old); | |
2552 | ospf_ase_unregister_external_lsa(old, ospf); | |
2553 | break; | |
2554 | default: | |
2555 | ospf_ls_retransmit_delete_nbr_area(old->area, old); | |
2556 | break; | |
2557 | } | |
2558 | ||
2559 | ospf_lsa_maxage_delete(ospf, old); | |
2560 | ospf_lsa_discard(old); | |
2561 | } | |
2562 | ||
2563 | struct ospf_lsa *ospf_lsa_install(struct ospf *ospf, struct ospf_interface *oi, | |
2564 | struct ospf_lsa *lsa) | |
2565 | { | |
2566 | struct ospf_lsa *new = NULL; | |
2567 | struct ospf_lsa *old = NULL; | |
2568 | struct ospf_lsdb *lsdb = NULL; | |
2569 | int rt_recalc; | |
2570 | ||
2571 | /* Set LSDB. */ | |
2572 | switch (lsa->data->type) { | |
2573 | /* kevinm */ | |
2574 | case OSPF_AS_NSSA_LSA: | |
2575 | if (lsa->area) | |
2576 | lsdb = lsa->area->lsdb; | |
2577 | else | |
2578 | lsdb = ospf->lsdb; | |
2579 | break; | |
2580 | case OSPF_AS_EXTERNAL_LSA: | |
2581 | case OSPF_OPAQUE_AS_LSA: | |
2582 | lsdb = ospf->lsdb; | |
2583 | break; | |
2584 | default: | |
2585 | lsdb = lsa->area->lsdb; | |
2586 | break; | |
2587 | } | |
2588 | ||
2589 | assert(lsdb); | |
2590 | ||
2591 | /* RFC 2328 13.2. Installing LSAs in the database | |
2592 | ||
2593 | Installing a new LSA in the database, either as the result of | |
2594 | flooding or a newly self-originated LSA, may cause the OSPF | |
2595 | routing table structure to be recalculated. The contents of the | |
2596 | new LSA should be compared to the old instance, if present. If | |
2597 | there is no difference, there is no need to recalculate the | |
2598 | routing table. When comparing an LSA to its previous instance, | |
2599 | the following are all considered to be differences in contents: | |
2600 | ||
2601 | o The LSA's Options field has changed. | |
2602 | ||
2603 | o One of the LSA instances has LS age set to MaxAge, and | |
2604 | the other does not. | |
2605 | ||
2606 | o The length field in the LSA header has changed. | |
2607 | ||
2608 | o The body of the LSA (i.e., anything outside the 20-byte | |
2609 | LSA header) has changed. Note that this excludes changes | |
2610 | in LS Sequence Number and LS Checksum. | |
2611 | ||
2612 | */ | |
2613 | /* Look up old LSA and determine if any SPF calculation or incremental | |
2614 | update is needed */ | |
2615 | old = ospf_lsdb_lookup(lsdb, lsa); | |
2616 | ||
2617 | /* Do comparision and record if recalc needed. */ | |
2618 | rt_recalc = 0; | |
2619 | if (old == NULL || ospf_lsa_different(old, lsa)) | |
2620 | rt_recalc = 1; | |
2621 | ||
2622 | /* | |
2623 | Sequence number check (Section 14.1 of rfc 2328) | |
2624 | "Premature aging is used when it is time for a self-originated | |
2625 | LSA's sequence number field to wrap. At this point, the current | |
2626 | LSA instance (having LS sequence number MaxSequenceNumber) must | |
2627 | be prematurely aged and flushed from the routing domain before a | |
2628 | new instance with sequence number equal to InitialSequenceNumber | |
2629 | can be originated. " | |
2630 | */ | |
2631 | ||
2632 | if (ntohl(lsa->data->ls_seqnum) - 1 == OSPF_MAX_SEQUENCE_NUMBER) { | |
2633 | if (ospf_lsa_is_self_originated(ospf, lsa)) { | |
2634 | lsa->data->ls_seqnum = htonl(OSPF_MAX_SEQUENCE_NUMBER); | |
2635 | ||
2636 | if (!IS_LSA_MAXAGE(lsa)) | |
2637 | lsa->flags |= OSPF_LSA_PREMATURE_AGE; | |
2638 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
2639 | ||
2640 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) { | |
2641 | zlog_debug( | |
2642 | "ospf_lsa_install() Premature Aging " | |
2643 | "lsa 0x%p, seqnum 0x%x", | |
2644 | (void *)lsa, | |
2645 | ntohl(lsa->data->ls_seqnum)); | |
2646 | ospf_lsa_header_dump(lsa->data); | |
2647 | } | |
2648 | } else { | |
2649 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
2650 | zlog_debug( | |
2651 | "ospf_lsa_install() got an lsa with seq 0x80000000 " | |
2652 | "that was not self originated. Ignoring\n"); | |
2653 | ospf_lsa_header_dump(lsa->data); | |
2654 | } | |
2655 | return old; | |
2656 | } | |
2657 | } | |
2658 | ||
2659 | /* discard old LSA from LSDB */ | |
2660 | if (old != NULL) | |
2661 | ospf_discard_from_db(ospf, lsdb, lsa); | |
2662 | ||
2663 | /* Calculate Checksum if self-originated?. */ | |
2664 | if (IS_LSA_SELF(lsa)) | |
2665 | ospf_lsa_checksum(lsa->data); | |
2666 | ||
2667 | /* Insert LSA to LSDB. */ | |
2668 | ospf_lsdb_add(lsdb, lsa); | |
2669 | lsa->lsdb = lsdb; | |
2670 | ||
2671 | /* Do LSA specific installation process. */ | |
2672 | switch (lsa->data->type) { | |
2673 | case OSPF_ROUTER_LSA: | |
2674 | new = ospf_router_lsa_install(ospf, lsa, rt_recalc); | |
2675 | break; | |
2676 | case OSPF_NETWORK_LSA: | |
2677 | assert(oi); | |
2678 | new = ospf_network_lsa_install(ospf, oi, lsa, rt_recalc); | |
2679 | break; | |
2680 | case OSPF_SUMMARY_LSA: | |
2681 | new = ospf_summary_lsa_install(ospf, lsa, rt_recalc); | |
2682 | break; | |
2683 | case OSPF_ASBR_SUMMARY_LSA: | |
2684 | new = ospf_summary_asbr_lsa_install(ospf, lsa, rt_recalc); | |
2685 | break; | |
2686 | case OSPF_AS_EXTERNAL_LSA: | |
2687 | new = ospf_external_lsa_install(ospf, lsa, rt_recalc); | |
2688 | break; | |
2689 | case OSPF_OPAQUE_LINK_LSA: | |
2690 | if (IS_LSA_SELF(lsa)) | |
2691 | lsa->oi = oi; /* Specify outgoing ospf-interface for | |
2692 | this LSA. */ | |
2693 | else { | |
2694 | /* Incoming "oi" for this LSA has set at LSUpd | |
2695 | * reception. */ | |
2696 | } | |
2697 | /* Fallthrough */ | |
2698 | case OSPF_OPAQUE_AREA_LSA: | |
2699 | case OSPF_OPAQUE_AS_LSA: | |
2700 | new = ospf_opaque_lsa_install(lsa, rt_recalc); | |
2701 | break; | |
2702 | case OSPF_AS_NSSA_LSA: | |
2703 | new = ospf_external_lsa_install(ospf, lsa, rt_recalc); | |
2704 | default: /* type-6,8,9....nothing special */ | |
2705 | break; | |
2706 | } | |
2707 | ||
2708 | if (new == NULL) | |
2709 | return new; /* Installation failed, cannot proceed further -- | |
2710 | endo. */ | |
2711 | ||
2712 | /* Debug logs. */ | |
2713 | if (IS_DEBUG_OSPF(lsa, LSA_INSTALL)) { | |
2714 | char area_str[INET_ADDRSTRLEN]; | |
2715 | ||
2716 | switch (lsa->data->type) { | |
2717 | case OSPF_AS_EXTERNAL_LSA: | |
2718 | case OSPF_OPAQUE_AS_LSA: | |
2719 | case OSPF_AS_NSSA_LSA: | |
2720 | zlog_debug("LSA[%s]: Install %s", dump_lsa_key(new), | |
2721 | lookup_msg(ospf_lsa_type_msg, | |
2722 | new->data->type, NULL)); | |
2723 | break; | |
2724 | default: | |
a1d6bbb1 RW |
2725 | strlcpy(area_str, inet_ntoa(new->area->area_id), |
2726 | sizeof(area_str)); | |
d62a17ae | 2727 | zlog_debug("LSA[%s]: Install %s to Area %s", |
2728 | dump_lsa_key(new), | |
2729 | lookup_msg(ospf_lsa_type_msg, | |
2730 | new->data->type, NULL), | |
2731 | area_str); | |
2732 | break; | |
2733 | } | |
2734 | } | |
2735 | ||
2736 | /* | |
2737 | If received LSA' ls_age is MaxAge, or lsa is being prematurely aged | |
2738 | (it's getting flushed out of the area), set LSA on MaxAge LSA list. | |
2739 | */ | |
2740 | if (IS_LSA_MAXAGE(new)) { | |
2741 | if (IS_DEBUG_OSPF(lsa, LSA_INSTALL)) | |
2742 | zlog_debug("LSA[Type%d:%s]: Install LSA 0x%p, MaxAge", | |
2743 | new->data->type, inet_ntoa(new->data->id), | |
2744 | (void *)lsa); | |
2745 | ospf_lsa_maxage(ospf, lsa); | |
2746 | } | |
2747 | ||
2748 | return new; | |
2749 | } | |
2750 | ||
2751 | ||
2752 | int ospf_check_nbr_status(struct ospf *ospf) | |
2753 | { | |
2754 | struct listnode *node, *nnode; | |
2755 | struct ospf_interface *oi; | |
2756 | ||
2757 | for (ALL_LIST_ELEMENTS(ospf->oiflist, node, nnode, oi)) { | |
2758 | struct route_node *rn; | |
2759 | struct ospf_neighbor *nbr; | |
2760 | ||
2761 | if (ospf_if_is_enable(oi)) | |
2762 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) | |
2763 | if ((nbr = rn->info) != NULL) | |
2764 | if (nbr->state == NSM_Exchange | |
2765 | || nbr->state == NSM_Loading) { | |
2766 | route_unlock_node(rn); | |
2767 | return 0; | |
2768 | } | |
2769 | } | |
2770 | ||
2771 | return 1; | |
2772 | } | |
2773 | ||
2774 | ||
2775 | static int ospf_maxage_lsa_remover(struct thread *thread) | |
2776 | { | |
2777 | struct ospf *ospf = THREAD_ARG(thread); | |
2778 | struct ospf_lsa *lsa; | |
2779 | struct route_node *rn; | |
2780 | int reschedule = 0; | |
2781 | ||
2782 | ospf->t_maxage = NULL; | |
2783 | ||
2784 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2785 | zlog_debug("LSA[MaxAge]: remover Start"); | |
2786 | ||
2787 | reschedule = !ospf_check_nbr_status(ospf); | |
2788 | ||
2789 | if (!reschedule) | |
2790 | for (rn = route_top(ospf->maxage_lsa); rn; | |
2791 | rn = route_next(rn)) { | |
2792 | if ((lsa = rn->info) == NULL) { | |
2793 | continue; | |
2794 | } | |
2795 | ||
2796 | /* There is at least one neighbor from which we still | |
2797 | * await an ack | |
2798 | * for that LSA, so we are not allowed to remove it from | |
2799 | * our lsdb yet | |
2800 | * as per RFC 2328 section 14 para 4 a) */ | |
2801 | if (lsa->retransmit_counter > 0) { | |
2802 | reschedule = 1; | |
2803 | continue; | |
2804 | } | |
2805 | ||
2806 | /* TODO: maybe convert this function to a work-queue */ | |
2807 | if (thread_should_yield(thread)) { | |
2808 | OSPF_TIMER_ON(ospf->t_maxage, | |
2809 | ospf_maxage_lsa_remover, 0); | |
2810 | route_unlock_node( | |
2811 | rn); /* route_top/route_next */ | |
2812 | return 0; | |
2813 | } | |
2814 | ||
2815 | /* Remove LSA from the LSDB */ | |
2816 | if (IS_LSA_SELF(lsa)) | |
2817 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2818 | zlog_debug( | |
2819 | "LSA[Type%d:%s]: LSA 0x%lx is self-originated: ", | |
2820 | lsa->data->type, | |
2821 | inet_ntoa(lsa->data->id), | |
2822 | (u_long)lsa); | |
2823 | ||
2824 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2825 | zlog_debug( | |
2826 | "LSA[Type%d:%s]: MaxAge LSA removed from list", | |
2827 | lsa->data->type, | |
2828 | inet_ntoa(lsa->data->id)); | |
2829 | ||
2830 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_PREMATURE_AGE)) { | |
2831 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2832 | zlog_debug( | |
2833 | "originating new lsa for lsa 0x%p\n", | |
2834 | (void *)lsa); | |
2835 | ospf_lsa_refresh(ospf, lsa); | |
2836 | } | |
2837 | ||
2838 | /* Remove from lsdb. */ | |
2839 | if (lsa->lsdb) { | |
2840 | ospf_discard_from_db(ospf, lsa->lsdb, lsa); | |
2841 | ospf_lsdb_delete(lsa->lsdb, lsa); | |
2842 | } else | |
2843 | zlog_warn( | |
2844 | "%s: LSA[Type%d:%s]: No associated LSDB!", | |
2845 | __func__, lsa->data->type, | |
2846 | inet_ntoa(lsa->data->id)); | |
2847 | } | |
2848 | ||
2849 | /* A MaxAge LSA must be removed immediately from the router's link | |
2850 | state database as soon as both a) it is no longer contained on any | |
2851 | neighbor Link state retransmission lists and b) none of the | |
2852 | router's | |
2853 | neighbors are in states Exchange or Loading. */ | |
2854 | if (reschedule) | |
2855 | OSPF_TIMER_ON(ospf->t_maxage, ospf_maxage_lsa_remover, | |
2856 | ospf->maxage_delay); | |
2857 | ||
2858 | return 0; | |
2859 | } | |
2860 | ||
2861 | void ospf_lsa_maxage_delete(struct ospf *ospf, struct ospf_lsa *lsa) | |
2862 | { | |
2863 | struct route_node *rn; | |
dcc3ef87 | 2864 | struct prefix lsa_prefix; |
d62a17ae | 2865 | |
dcc3ef87 | 2866 | memset(&lsa_prefix, 0, sizeof(struct prefix)); |
d62a17ae | 2867 | lsa_prefix.family = 0; |
dcc3ef87 CS |
2868 | lsa_prefix.prefixlen = sizeof(lsa_prefix.u.ptr) * CHAR_BIT; |
2869 | lsa_prefix.u.ptr = (uintptr_t)lsa; | |
d62a17ae | 2870 | |
2871 | if ((rn = route_node_lookup(ospf->maxage_lsa, | |
2872 | (struct prefix *)&lsa_prefix))) { | |
2873 | if (rn->info == lsa) { | |
2874 | UNSET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); | |
2875 | ospf_lsa_unlock(&lsa); /* maxage_lsa */ | |
2876 | rn->info = NULL; | |
2877 | route_unlock_node( | |
2878 | rn); /* unlock node because lsa is deleted */ | |
2879 | } | |
2880 | route_unlock_node(rn); /* route_node_lookup */ | |
dcc3ef87 CS |
2881 | } else { |
2882 | if (IS_DEBUG_OSPF_EVENT) | |
2883 | zlog_debug("%s: lsa %s is not found in maxage db.", | |
2884 | __PRETTY_FUNCTION__, dump_lsa_key(lsa)); | |
d62a17ae | 2885 | } |
718e3744 | 2886 | } |
2887 | ||
02d942c9 PJ |
2888 | /* Add LSA onto the MaxAge list, and schedule for removal. |
2889 | * This does *not* lead to the LSA being flooded, that must be taken | |
2890 | * care of elsewhere, see, e.g., ospf_lsa_flush* (which are callers of this | |
2891 | * function). | |
2892 | */ | |
d62a17ae | 2893 | void ospf_lsa_maxage(struct ospf *ospf, struct ospf_lsa *lsa) |
2894 | { | |
dcc3ef87 | 2895 | struct prefix lsa_prefix; |
d62a17ae | 2896 | struct route_node *rn; |
2897 | ||
2898 | /* When we saw a MaxAge LSA flooded to us, we put it on the list | |
2899 | and schedule the MaxAge LSA remover. */ | |
2900 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE)) { | |
2901 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2902 | zlog_debug( | |
2903 | "LSA[Type%d:%s]: %p already exists on MaxAge LSA list", | |
2904 | lsa->data->type, inet_ntoa(lsa->data->id), | |
2905 | (void *)lsa); | |
2906 | return; | |
2907 | } | |
2908 | ||
dcc3ef87 | 2909 | memset(&lsa_prefix, 0, sizeof(struct prefix)); |
d62a17ae | 2910 | lsa_prefix.family = 0; |
dcc3ef87 CS |
2911 | lsa_prefix.prefixlen = sizeof(lsa_prefix.u.ptr) * CHAR_BIT; |
2912 | lsa_prefix.u.ptr = (uintptr_t)lsa; | |
d62a17ae | 2913 | |
2914 | if ((rn = route_node_get(ospf->maxage_lsa, | |
2915 | (struct prefix *)&lsa_prefix)) | |
2916 | != NULL) { | |
2917 | if (rn->info != NULL) { | |
2918 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2919 | zlog_debug( | |
2920 | "LSA[%s]: found LSA (%p) in table for LSA %p %d", | |
2921 | dump_lsa_key(lsa), rn->info, | |
2922 | (void *)lsa, lsa_prefix.prefixlen); | |
2923 | route_unlock_node(rn); | |
2924 | } else { | |
2925 | rn->info = ospf_lsa_lock(lsa); | |
2926 | SET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); | |
2927 | } | |
2928 | } else { | |
dcc3ef87 CS |
2929 | zlog_err("Unable to allocate memory for maxage lsa %s\n", |
2930 | dump_lsa_key(lsa)); | |
d62a17ae | 2931 | assert(0); |
2932 | } | |
2933 | ||
2934 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2935 | zlog_debug("LSA[%s]: MaxAge LSA remover scheduled.", | |
2936 | dump_lsa_key(lsa)); | |
2937 | ||
2938 | OSPF_TIMER_ON(ospf->t_maxage, ospf_maxage_lsa_remover, | |
2939 | ospf->maxage_delay); | |
2940 | } | |
2941 | ||
2942 | static int ospf_lsa_maxage_walker_remover(struct ospf *ospf, | |
2943 | struct ospf_lsa *lsa) | |
2944 | { | |
2945 | /* Stay away from any Local Translated Type-7 LSAs */ | |
2946 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
2947 | return 0; | |
2948 | ||
2949 | if (IS_LSA_MAXAGE(lsa)) | |
2950 | /* Self-originated LSAs should NOT time-out instead, | |
2951 | they're flushed and submitted to the max_age list explicitly. | |
2952 | */ | |
2953 | if (!ospf_lsa_is_self_originated(ospf, lsa)) { | |
2954 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2955 | zlog_debug("LSA[%s]: is MaxAge", | |
2956 | dump_lsa_key(lsa)); | |
2957 | ||
2958 | switch (lsa->data->type) { | |
2959 | case OSPF_OPAQUE_LINK_LSA: | |
2960 | case OSPF_OPAQUE_AREA_LSA: | |
2961 | case OSPF_OPAQUE_AS_LSA: | |
2962 | /* | |
2963 | * As a general rule, whenever network topology | |
2964 | * has changed | |
2965 | * (due to an LSA removal in this case), routing | |
2966 | * recalculation | |
2967 | * should be triggered. However, this is not | |
2968 | * true for opaque | |
2969 | * LSAs. Even if an opaque LSA instance is going | |
2970 | * to be removed | |
2971 | * from the routing domain, it does not mean a | |
2972 | * change in network | |
2973 | * topology, and thus, routing recalculation is | |
2974 | * not needed here. | |
2975 | */ | |
2976 | break; | |
2977 | case OSPF_AS_EXTERNAL_LSA: | |
2978 | case OSPF_AS_NSSA_LSA: | |
2979 | ospf_ase_incremental_update(ospf, lsa); | |
2980 | break; | |
2981 | default: | |
2982 | ospf_spf_calculate_schedule(ospf, | |
2983 | SPF_FLAG_MAXAGE); | |
2984 | break; | |
2985 | } | |
2986 | ospf_lsa_maxage(ospf, lsa); | |
2987 | } | |
2988 | ||
2989 | if (IS_LSA_MAXAGE(lsa) && !ospf_lsa_is_self_originated(ospf, lsa)) | |
2990 | if (LS_AGE(lsa) > OSPF_LSA_MAXAGE + 30) | |
2991 | printf("Eek! Shouldn't happen!\n"); | |
2992 | ||
2993 | return 0; | |
718e3744 | 2994 | } |
2995 | ||
2996 | /* Periodical check of MaxAge LSA. */ | |
d62a17ae | 2997 | int ospf_lsa_maxage_walker(struct thread *thread) |
2998 | { | |
2999 | struct ospf *ospf = THREAD_ARG(thread); | |
3000 | struct route_node *rn; | |
3001 | struct ospf_lsa *lsa; | |
3002 | struct ospf_area *area; | |
3003 | struct listnode *node, *nnode; | |
3004 | ||
3005 | ospf->t_maxage_walker = NULL; | |
3006 | ||
3007 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { | |
3008 | LSDB_LOOP(ROUTER_LSDB(area), rn, lsa) | |
044506e7 | 3009 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3010 | LSDB_LOOP(NETWORK_LSDB(area), rn, lsa) |
044506e7 | 3011 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3012 | LSDB_LOOP(SUMMARY_LSDB(area), rn, lsa) |
044506e7 | 3013 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3014 | LSDB_LOOP(ASBR_SUMMARY_LSDB(area), rn, lsa) |
044506e7 | 3015 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3016 | LSDB_LOOP(OPAQUE_AREA_LSDB(area), rn, lsa) |
044506e7 | 3017 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3018 | LSDB_LOOP(OPAQUE_LINK_LSDB(area), rn, lsa) |
044506e7 | 3019 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3020 | LSDB_LOOP(NSSA_LSDB(area), rn, lsa) |
044506e7 | 3021 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3022 | } |
3023 | ||
3024 | /* for AS-external-LSAs. */ | |
3025 | if (ospf->lsdb) { | |
3026 | LSDB_LOOP(EXTERNAL_LSDB(ospf), rn, lsa) | |
044506e7 | 3027 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3028 | LSDB_LOOP(OPAQUE_AS_LSDB(ospf), rn, lsa) |
044506e7 | 3029 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3030 | } |
3031 | ||
3032 | OSPF_TIMER_ON(ospf->t_maxage_walker, ospf_lsa_maxage_walker, | |
3033 | OSPF_LSA_MAXAGE_CHECK_INTERVAL); | |
3034 | return 0; | |
3035 | } | |
3036 | ||
3037 | struct ospf_lsa *ospf_lsa_lookup_by_prefix(struct ospf_lsdb *lsdb, u_char type, | |
3038 | struct prefix_ipv4 *p, | |
3039 | struct in_addr router_id) | |
3040 | { | |
3041 | struct ospf_lsa *lsa; | |
3042 | struct in_addr mask, id; | |
3043 | struct lsa_header_mask { | |
3044 | struct lsa_header header; | |
3045 | struct in_addr mask; | |
3046 | } * hmask; | |
3047 | ||
3048 | lsa = ospf_lsdb_lookup_by_id(lsdb, type, p->prefix, router_id); | |
3049 | if (lsa == NULL) | |
3050 | return NULL; | |
3051 | ||
3052 | masklen2ip(p->prefixlen, &mask); | |
3053 | ||
3054 | hmask = (struct lsa_header_mask *)lsa->data; | |
3055 | ||
3056 | if (mask.s_addr != hmask->mask.s_addr) { | |
3057 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
3058 | lsa = ospf_lsdb_lookup_by_id(lsdb, type, id, router_id); | |
3059 | if (!lsa) | |
3060 | return NULL; | |
3061 | } | |
3062 | ||
3063 | return lsa; | |
3064 | } | |
3065 | ||
b5a8894d CS |
3066 | struct ospf_lsa *ospf_lsa_lookup(struct ospf *ospf, struct ospf_area *area, |
3067 | u_int32_t type, struct in_addr id, | |
3068 | struct in_addr adv_router) | |
d62a17ae | 3069 | { |
b5a8894d CS |
3070 | if (!ospf) |
3071 | return NULL; | |
d62a17ae | 3072 | |
3073 | switch (type) { | |
3074 | case OSPF_ROUTER_LSA: | |
3075 | case OSPF_NETWORK_LSA: | |
3076 | case OSPF_SUMMARY_LSA: | |
3077 | case OSPF_ASBR_SUMMARY_LSA: | |
3078 | case OSPF_AS_NSSA_LSA: | |
3079 | case OSPF_OPAQUE_LINK_LSA: | |
3080 | case OSPF_OPAQUE_AREA_LSA: | |
3081 | return ospf_lsdb_lookup_by_id(area->lsdb, type, id, adv_router); | |
3082 | case OSPF_AS_EXTERNAL_LSA: | |
3083 | case OSPF_OPAQUE_AS_LSA: | |
3084 | return ospf_lsdb_lookup_by_id(ospf->lsdb, type, id, adv_router); | |
3085 | default: | |
3086 | break; | |
3087 | } | |
3088 | ||
3089 | return NULL; | |
3090 | } | |
3091 | ||
3092 | struct ospf_lsa *ospf_lsa_lookup_by_id(struct ospf_area *area, u_int32_t type, | |
3093 | struct in_addr id) | |
3094 | { | |
3095 | struct ospf_lsa *lsa; | |
3096 | struct route_node *rn; | |
3097 | ||
3098 | switch (type) { | |
3099 | case OSPF_ROUTER_LSA: | |
3100 | return ospf_lsdb_lookup_by_id(area->lsdb, type, id, id); | |
3101 | case OSPF_NETWORK_LSA: | |
3102 | for (rn = route_top(NETWORK_LSDB(area)); rn; | |
3103 | rn = route_next(rn)) | |
3104 | if ((lsa = rn->info)) | |
3105 | if (IPV4_ADDR_SAME(&lsa->data->id, &id)) { | |
3106 | route_unlock_node(rn); | |
3107 | return lsa; | |
3108 | } | |
3109 | break; | |
3110 | case OSPF_SUMMARY_LSA: | |
3111 | case OSPF_ASBR_SUMMARY_LSA: | |
3112 | /* Currently not used. */ | |
3113 | assert(1); | |
3114 | return ospf_lsdb_lookup_by_id(area->lsdb, type, id, id); | |
3115 | case OSPF_AS_EXTERNAL_LSA: | |
3116 | case OSPF_AS_NSSA_LSA: | |
3117 | case OSPF_OPAQUE_LINK_LSA: | |
3118 | case OSPF_OPAQUE_AREA_LSA: | |
3119 | case OSPF_OPAQUE_AS_LSA: | |
3120 | /* Currently not used. */ | |
3121 | break; | |
3122 | default: | |
3123 | break; | |
3124 | } | |
3125 | ||
3126 | return NULL; | |
3127 | } | |
3128 | ||
3129 | struct ospf_lsa *ospf_lsa_lookup_by_header(struct ospf_area *area, | |
3130 | struct lsa_header *lsah) | |
3131 | { | |
3132 | struct ospf_lsa *match; | |
3133 | ||
3134 | /* | |
3135 | * Strictly speaking, the LSA-ID field for Opaque-LSAs (type-9/10/11) | |
3136 | * is redefined to have two subfields; opaque-type and opaque-id. | |
3137 | * However, it is harmless to treat the two sub fields together, as if | |
3138 | * they two were forming a unique LSA-ID. | |
3139 | */ | |
3140 | ||
b5a8894d CS |
3141 | match = ospf_lsa_lookup(area->ospf, area, lsah->type, lsah->id, |
3142 | lsah->adv_router); | |
d62a17ae | 3143 | |
3144 | if (match == NULL) | |
3145 | if (IS_DEBUG_OSPF(lsa, LSA) == OSPF_DEBUG_LSA) | |
3146 | zlog_debug("LSA[Type%d:%s]: Lookup by header, NO MATCH", | |
3147 | lsah->type, inet_ntoa(lsah->id)); | |
3148 | ||
3149 | return match; | |
718e3744 | 3150 | } |
3151 | ||
3152 | /* return +n, l1 is more recent. | |
3153 | return -n, l2 is more recent. | |
3154 | return 0, l1 and l2 is identical. */ | |
d62a17ae | 3155 | int ospf_lsa_more_recent(struct ospf_lsa *l1, struct ospf_lsa *l2) |
3156 | { | |
3157 | int r; | |
3158 | int x, y; | |
3159 | ||
3160 | if (l1 == NULL && l2 == NULL) | |
3161 | return 0; | |
3162 | if (l1 == NULL) | |
3163 | return -1; | |
3164 | if (l2 == NULL) | |
3165 | return 1; | |
3166 | ||
3167 | /* compare LS sequence number. */ | |
3168 | x = (int)ntohl(l1->data->ls_seqnum); | |
3169 | y = (int)ntohl(l2->data->ls_seqnum); | |
3170 | if (x > y) | |
3171 | return 1; | |
3172 | if (x < y) | |
3173 | return -1; | |
3174 | ||
3175 | /* compare LS checksum. */ | |
3176 | r = ntohs(l1->data->checksum) - ntohs(l2->data->checksum); | |
3177 | if (r) | |
3178 | return r; | |
3179 | ||
3180 | /* compare LS age. */ | |
3181 | if (IS_LSA_MAXAGE(l1) && !IS_LSA_MAXAGE(l2)) | |
3182 | return 1; | |
3183 | else if (!IS_LSA_MAXAGE(l1) && IS_LSA_MAXAGE(l2)) | |
3184 | return -1; | |
3185 | ||
3186 | /* compare LS age with MaxAgeDiff. */ | |
3187 | if (LS_AGE(l1) - LS_AGE(l2) > OSPF_LSA_MAXAGE_DIFF) | |
3188 | return -1; | |
3189 | else if (LS_AGE(l2) - LS_AGE(l1) > OSPF_LSA_MAXAGE_DIFF) | |
3190 | return 1; | |
3191 | ||
3192 | /* LSAs are identical. */ | |
3193 | return 0; | |
718e3744 | 3194 | } |
3195 | ||
3196 | /* If two LSAs are different, return 1, otherwise return 0. */ | |
d62a17ae | 3197 | int ospf_lsa_different(struct ospf_lsa *l1, struct ospf_lsa *l2) |
718e3744 | 3198 | { |
d62a17ae | 3199 | char *p1, *p2; |
3200 | assert(l1); | |
3201 | assert(l2); | |
3202 | assert(l1->data); | |
3203 | assert(l2->data); | |
718e3744 | 3204 | |
d62a17ae | 3205 | if (l1->data->options != l2->data->options) |
3206 | return 1; | |
718e3744 | 3207 | |
d62a17ae | 3208 | if (IS_LSA_MAXAGE(l1) && !IS_LSA_MAXAGE(l2)) |
3209 | return 1; | |
718e3744 | 3210 | |
d62a17ae | 3211 | if (IS_LSA_MAXAGE(l2) && !IS_LSA_MAXAGE(l1)) |
3212 | return 1; | |
718e3744 | 3213 | |
d62a17ae | 3214 | if (l1->data->length != l2->data->length) |
3215 | return 1; | |
718e3744 | 3216 | |
d62a17ae | 3217 | if (l1->data->length == 0) |
3218 | return 1; | |
718e3744 | 3219 | |
d62a17ae | 3220 | if (CHECK_FLAG((l1->flags ^ l2->flags), OSPF_LSA_RECEIVED)) |
3221 | return 1; /* May be a stale LSA in the LSBD */ | |
5996e0df | 3222 | |
d62a17ae | 3223 | assert(ntohs(l1->data->length) > OSPF_LSA_HEADER_SIZE); |
718e3744 | 3224 | |
d62a17ae | 3225 | p1 = (char *)l1->data; |
3226 | p2 = (char *)l2->data; | |
718e3744 | 3227 | |
d62a17ae | 3228 | if (memcmp(p1 + OSPF_LSA_HEADER_SIZE, p2 + OSPF_LSA_HEADER_SIZE, |
3229 | ntohs(l1->data->length) - OSPF_LSA_HEADER_SIZE) | |
3230 | != 0) | |
3231 | return 1; | |
718e3744 | 3232 | |
d62a17ae | 3233 | return 0; |
718e3744 | 3234 | } |
3235 | ||
3236 | #ifdef ORIGINAL_CODING | |
d62a17ae | 3237 | void ospf_lsa_flush_self_originated(struct ospf_neighbor *nbr, |
3238 | struct ospf_lsa *self, struct ospf_lsa *new) | |
3239 | { | |
3240 | u_int32_t seqnum; | |
3241 | ||
3242 | /* Adjust LS Sequence Number. */ | |
3243 | seqnum = ntohl(new->data->ls_seqnum) + 1; | |
3244 | self->data->ls_seqnum = htonl(seqnum); | |
3245 | ||
3246 | /* Recalculate LSA checksum. */ | |
3247 | ospf_lsa_checksum(self->data); | |
3248 | ||
3249 | /* Reflooding LSA. */ | |
3250 | /* RFC2328 Section 13.3 | |
3251 | On non-broadcast networks, separate Link State Update | |
3252 | packets must be sent, as unicasts, to each adjacent neighbor | |
3253 | (i.e., those in state Exchange or greater). The destination | |
3254 | IP addresses for these packets are the neighbors' IP | |
3255 | addresses. */ | |
3256 | if (nbr->oi->type == OSPF_IFTYPE_NBMA) { | |
3257 | struct route_node *rn; | |
3258 | struct ospf_neighbor *onbr; | |
3259 | ||
3260 | for (rn = route_top(nbr->oi->nbrs); rn; rn = route_next(rn)) | |
3261 | if ((onbr = rn->info) != NULL) | |
3262 | if (onbr != nbr->oi->nbr_self | |
3263 | && onbr->status >= NSM_Exchange) | |
3264 | ospf_ls_upd_send_lsa( | |
3265 | onbr, self, | |
3266 | OSPF_SEND_PACKET_DIRECT); | |
3267 | } else | |
3268 | ospf_ls_upd_send_lsa(nbr, self, OSPF_SEND_PACKET_INDIRECT); | |
3269 | ||
3270 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
3271 | zlog_debug("LSA[Type%d:%s]: Flush self-originated LSA", | |
3272 | self->data->type, inet_ntoa(self->data->id)); | |
3273 | } | |
3274 | #else /* ORIGINAL_CODING */ | |
3275 | int ospf_lsa_flush_schedule(struct ospf *ospf, struct ospf_lsa *lsa) | |
3276 | { | |
3277 | if (lsa == NULL || !IS_LSA_SELF(lsa)) | |
3278 | return 0; | |
3279 | ||
3280 | if (IS_DEBUG_OSPF_EVENT) | |
3281 | zlog_debug( | |
3282 | "LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", | |
3283 | lsa->data->type, inet_ntoa(lsa->data->id)); | |
3284 | ||
3285 | /* Force given lsa's age to MaxAge. */ | |
3286 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
3287 | ||
3288 | switch (lsa->data->type) { | |
3289 | /* Opaque wants to be notified of flushes */ | |
3290 | case OSPF_OPAQUE_LINK_LSA: | |
3291 | case OSPF_OPAQUE_AREA_LSA: | |
3292 | case OSPF_OPAQUE_AS_LSA: | |
3293 | ospf_opaque_lsa_refresh(lsa); | |
3294 | break; | |
3295 | default: | |
3296 | ospf_refresher_unregister_lsa(ospf, lsa); | |
3297 | ospf_lsa_flush(ospf, lsa); | |
3298 | break; | |
3299 | } | |
3300 | ||
3301 | return 0; | |
3302 | } | |
3303 | ||
3304 | void ospf_flush_self_originated_lsas_now(struct ospf *ospf) | |
3305 | { | |
3306 | struct listnode *node, *nnode; | |
3307 | struct listnode *node2, *nnode2; | |
3308 | struct ospf_area *area; | |
3309 | struct ospf_interface *oi; | |
3310 | struct ospf_lsa *lsa; | |
3311 | struct route_node *rn; | |
3312 | int need_to_flush_ase = 0; | |
3313 | ||
046460a1 CS |
3314 | ospf->inst_shutdown = 1; |
3315 | ||
d62a17ae | 3316 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { |
3317 | if ((lsa = area->router_lsa_self) != NULL) { | |
3318 | if (IS_DEBUG_OSPF_EVENT) | |
3319 | zlog_debug( | |
3320 | "LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", | |
3321 | lsa->data->type, | |
3322 | inet_ntoa(lsa->data->id)); | |
3323 | ||
3324 | ospf_refresher_unregister_lsa(ospf, lsa); | |
3325 | ospf_lsa_flush_area(lsa, area); | |
3326 | ospf_lsa_unlock(&area->router_lsa_self); | |
3327 | area->router_lsa_self = NULL; | |
3328 | } | |
3329 | ||
3330 | for (ALL_LIST_ELEMENTS(area->oiflist, node2, nnode2, oi)) { | |
3331 | if ((lsa = oi->network_lsa_self) != NULL | |
3332 | && oi->state == ISM_DR && oi->full_nbrs > 0) { | |
3333 | if (IS_DEBUG_OSPF_EVENT) | |
3334 | zlog_debug( | |
3335 | "LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", | |
3336 | lsa->data->type, | |
3337 | inet_ntoa(lsa->data->id)); | |
3338 | ||
3339 | ospf_refresher_unregister_lsa( | |
3340 | ospf, oi->network_lsa_self); | |
3341 | ospf_lsa_flush_area(oi->network_lsa_self, area); | |
3342 | ospf_lsa_unlock(&oi->network_lsa_self); | |
3343 | oi->network_lsa_self = NULL; | |
3344 | } | |
3345 | ||
3346 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK | |
3347 | && area->external_routing == OSPF_AREA_DEFAULT) | |
3348 | need_to_flush_ase = 1; | |
3349 | } | |
3350 | ||
3351 | LSDB_LOOP(SUMMARY_LSDB(area), rn, lsa) | |
044506e7 | 3352 | ospf_lsa_flush_schedule(ospf, lsa); |
d62a17ae | 3353 | LSDB_LOOP(ASBR_SUMMARY_LSDB(area), rn, lsa) |
044506e7 | 3354 | ospf_lsa_flush_schedule(ospf, lsa); |
d62a17ae | 3355 | LSDB_LOOP(OPAQUE_LINK_LSDB(area), rn, lsa) |
044506e7 | 3356 | ospf_lsa_flush_schedule(ospf, lsa); |
d62a17ae | 3357 | LSDB_LOOP(OPAQUE_AREA_LSDB(area), rn, lsa) |
044506e7 | 3358 | ospf_lsa_flush_schedule(ospf, lsa); |
d62a17ae | 3359 | } |
3360 | ||
3361 | if (need_to_flush_ase) { | |
3362 | LSDB_LOOP(EXTERNAL_LSDB(ospf), rn, lsa) | |
044506e7 | 3363 | ospf_lsa_flush_schedule(ospf, lsa); |
d62a17ae | 3364 | LSDB_LOOP(OPAQUE_AS_LSDB(ospf), rn, lsa) |
044506e7 | 3365 | ospf_lsa_flush_schedule(ospf, lsa); |
d62a17ae | 3366 | } |
3367 | ||
3368 | /* | |
3369 | * Make sure that the MaxAge LSA remover is executed immediately, | |
3370 | * without conflicting to other threads. | |
3371 | */ | |
3372 | if (ospf->t_maxage != NULL) { | |
3373 | OSPF_TIMER_OFF(ospf->t_maxage); | |
3374 | thread_execute(master, ospf_maxage_lsa_remover, ospf, 0); | |
3375 | } | |
3376 | ||
3377 | return; | |
718e3744 | 3378 | } |
3379 | #endif /* ORIGINAL_CODING */ | |
3380 | ||
3381 | /* If there is self-originated LSA, then return 1, otherwise return 0. */ | |
3382 | /* An interface-independent version of ospf_lsa_is_self_originated */ | |
d62a17ae | 3383 | int ospf_lsa_is_self_originated(struct ospf *ospf, struct ospf_lsa *lsa) |
3384 | { | |
3385 | struct listnode *node; | |
3386 | struct ospf_interface *oi; | |
3387 | ||
3388 | /* This LSA is already checked. */ | |
3389 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_SELF_CHECKED)) | |
3390 | return IS_LSA_SELF(lsa); | |
3391 | ||
3392 | /* Make sure LSA is self-checked. */ | |
3393 | SET_FLAG(lsa->flags, OSPF_LSA_SELF_CHECKED); | |
3394 | ||
3395 | /* AdvRouter and Router ID is the same. */ | |
3396 | if (IPV4_ADDR_SAME(&lsa->data->adv_router, &ospf->router_id)) | |
3397 | SET_FLAG(lsa->flags, OSPF_LSA_SELF); | |
3398 | ||
3399 | /* LSA is router-LSA. */ | |
3400 | else if (lsa->data->type == OSPF_ROUTER_LSA | |
3401 | && IPV4_ADDR_SAME(&lsa->data->id, &ospf->router_id)) | |
3402 | SET_FLAG(lsa->flags, OSPF_LSA_SELF); | |
3403 | ||
3404 | /* LSA is network-LSA. Compare Link ID with all interfaces. */ | |
3405 | else if (lsa->data->type == OSPF_NETWORK_LSA) | |
3406 | for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi)) { | |
3407 | /* Ignore virtual link. */ | |
3408 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
3409 | if (oi->address->family == AF_INET) | |
3410 | if (IPV4_ADDR_SAME( | |
3411 | &lsa->data->id, | |
3412 | &oi->address->u.prefix4)) { | |
3413 | /* to make it easier later */ | |
3414 | SET_FLAG(lsa->flags, | |
3415 | OSPF_LSA_SELF); | |
3416 | return IS_LSA_SELF(lsa); | |
3417 | } | |
3418 | } | |
3419 | ||
3420 | return IS_LSA_SELF(lsa); | |
718e3744 | 3421 | } |
3422 | ||
3423 | /* Get unique Link State ID. */ | |
d62a17ae | 3424 | struct in_addr ospf_lsa_unique_id(struct ospf *ospf, struct ospf_lsdb *lsdb, |
3425 | u_char type, struct prefix_ipv4 *p) | |
3426 | { | |
3427 | struct ospf_lsa *lsa; | |
3428 | struct in_addr mask, id; | |
3429 | ||
3430 | id = p->prefix; | |
3431 | ||
3432 | /* Check existence of LSA instance. */ | |
3433 | lsa = ospf_lsdb_lookup_by_id(lsdb, type, id, ospf->router_id); | |
3434 | if (lsa) { | |
3435 | struct as_external_lsa *al = | |
3436 | (struct as_external_lsa *)lsa->data; | |
3437 | if (ip_masklen(al->mask) == p->prefixlen) { | |
3438 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
3439 | zlog_debug( | |
3440 | "ospf_lsa_unique_id(): " | |
3441 | "Can't get Link State ID for %s/%d", | |
3442 | inet_ntoa(p->prefix), p->prefixlen); | |
3443 | /* id.s_addr = 0; */ | |
3444 | id.s_addr = 0xffffffff; | |
3445 | return id; | |
3446 | } | |
3447 | /* Masklen differs, then apply wildcard mask to Link State ID. | |
9d303b37 | 3448 | */ |
d62a17ae | 3449 | else { |
3450 | masklen2ip(p->prefixlen, &mask); | |
3451 | ||
3452 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
3453 | lsa = ospf_lsdb_lookup_by_id(ospf->lsdb, type, id, | |
3454 | ospf->router_id); | |
3455 | if (lsa) { | |
3456 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
3457 | zlog_debug( | |
3458 | "ospf_lsa_unique_id(): " | |
3459 | "Can't get Link State ID for %s/%d", | |
3460 | inet_ntoa(p->prefix), | |
3461 | p->prefixlen); | |
3462 | /* id.s_addr = 0; */ | |
3463 | id.s_addr = 0xffffffff; | |
3464 | return id; | |
3465 | } | |
3466 | } | |
3467 | } | |
3468 | ||
3469 | return id; | |
718e3744 | 3470 | } |
3471 | ||
6b0655a2 | 3472 | |
70461d79 PJ |
3473 | #define LSA_ACTION_FLOOD_AREA 1 |
3474 | #define LSA_ACTION_FLUSH_AREA 2 | |
718e3744 | 3475 | |
d62a17ae | 3476 | struct lsa_action { |
3477 | u_char action; | |
3478 | struct ospf_area *area; | |
3479 | struct ospf_lsa *lsa; | |
718e3744 | 3480 | }; |
3481 | ||
d62a17ae | 3482 | static int ospf_lsa_action(struct thread *t) |
718e3744 | 3483 | { |
d62a17ae | 3484 | struct lsa_action *data; |
718e3744 | 3485 | |
d62a17ae | 3486 | data = THREAD_ARG(t); |
718e3744 | 3487 | |
d62a17ae | 3488 | if (IS_DEBUG_OSPF(lsa, LSA) == OSPF_DEBUG_LSA) |
3489 | zlog_debug("LSA[Action]: Performing scheduled LSA action: %d", | |
3490 | data->action); | |
718e3744 | 3491 | |
d62a17ae | 3492 | switch (data->action) { |
3493 | case LSA_ACTION_FLOOD_AREA: | |
3494 | ospf_flood_through_area(data->area, NULL, data->lsa); | |
3495 | break; | |
3496 | case LSA_ACTION_FLUSH_AREA: | |
3497 | ospf_lsa_flush_area(data->lsa, data->area); | |
3498 | break; | |
3499 | } | |
718e3744 | 3500 | |
d62a17ae | 3501 | ospf_lsa_unlock(&data->lsa); /* Message */ |
3502 | XFREE(MTYPE_OSPF_MESSAGE, data); | |
3503 | return 0; | |
718e3744 | 3504 | } |
3505 | ||
d62a17ae | 3506 | void ospf_schedule_lsa_flood_area(struct ospf_area *area, struct ospf_lsa *lsa) |
718e3744 | 3507 | { |
d62a17ae | 3508 | struct lsa_action *data; |
718e3744 | 3509 | |
d62a17ae | 3510 | data = XCALLOC(MTYPE_OSPF_MESSAGE, sizeof(struct lsa_action)); |
3511 | data->action = LSA_ACTION_FLOOD_AREA; | |
3512 | data->area = area; | |
3513 | data->lsa = ospf_lsa_lock(lsa); /* Message / Flood area */ | |
718e3744 | 3514 | |
d62a17ae | 3515 | thread_add_event(master, ospf_lsa_action, data, 0, NULL); |
718e3744 | 3516 | } |
3517 | ||
d62a17ae | 3518 | void ospf_schedule_lsa_flush_area(struct ospf_area *area, struct ospf_lsa *lsa) |
718e3744 | 3519 | { |
d62a17ae | 3520 | struct lsa_action *data; |
718e3744 | 3521 | |
d62a17ae | 3522 | data = XCALLOC(MTYPE_OSPF_MESSAGE, sizeof(struct lsa_action)); |
3523 | data->action = LSA_ACTION_FLUSH_AREA; | |
3524 | data->area = area; | |
3525 | data->lsa = ospf_lsa_lock(lsa); /* Message / Flush area */ | |
718e3744 | 3526 | |
d62a17ae | 3527 | thread_add_event(master, ospf_lsa_action, data, 0, NULL); |
718e3744 | 3528 | } |
3529 | ||
6b0655a2 | 3530 | |
718e3744 | 3531 | /* LSA Refreshment functions. */ |
d62a17ae | 3532 | struct ospf_lsa *ospf_lsa_refresh(struct ospf *ospf, struct ospf_lsa *lsa) |
3533 | { | |
3534 | struct external_info *ei; | |
3535 | struct ospf_lsa *new = NULL; | |
3536 | assert(CHECK_FLAG(lsa->flags, OSPF_LSA_SELF)); | |
3537 | assert(IS_LSA_SELF(lsa)); | |
3538 | assert(lsa->lock > 0); | |
3539 | ||
3540 | switch (lsa->data->type) { | |
3541 | /* Router and Network LSAs are processed differently. */ | |
3542 | case OSPF_ROUTER_LSA: | |
3543 | new = ospf_router_lsa_refresh(lsa); | |
3544 | break; | |
3545 | case OSPF_NETWORK_LSA: | |
3546 | new = ospf_network_lsa_refresh(lsa); | |
3547 | break; | |
3548 | case OSPF_SUMMARY_LSA: | |
3549 | new = ospf_summary_lsa_refresh(ospf, lsa); | |
3550 | break; | |
3551 | case OSPF_ASBR_SUMMARY_LSA: | |
3552 | new = ospf_summary_asbr_lsa_refresh(ospf, lsa); | |
3553 | break; | |
3554 | case OSPF_AS_EXTERNAL_LSA: | |
3555 | /* Translated from NSSA Type-5s are refreshed when | |
3556 | * from refresh of Type-7 - do not refresh these directly. | |
3557 | */ | |
3558 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
3559 | break; | |
b5a8894d | 3560 | ei = ospf_external_info_check(ospf, lsa); |
d62a17ae | 3561 | if (ei) |
3562 | new = ospf_external_lsa_refresh(ospf, lsa, ei, | |
3563 | LSA_REFRESH_FORCE); | |
3564 | else | |
3565 | ospf_lsa_flush_as(ospf, lsa); | |
3566 | break; | |
3567 | case OSPF_OPAQUE_LINK_LSA: | |
3568 | case OSPF_OPAQUE_AREA_LSA: | |
3569 | case OSPF_OPAQUE_AS_LSA: | |
3570 | new = ospf_opaque_lsa_refresh(lsa); | |
3571 | break; | |
3572 | default: | |
3573 | break; | |
3574 | } | |
3575 | return new; | |
718e3744 | 3576 | } |
3577 | ||
d62a17ae | 3578 | void ospf_refresher_register_lsa(struct ospf *ospf, struct ospf_lsa *lsa) |
3579 | { | |
3580 | u_int16_t index, current_index; | |
3581 | ||
3582 | assert(lsa->lock > 0); | |
3583 | assert(IS_LSA_SELF(lsa)); | |
3584 | ||
3585 | if (lsa->refresh_list < 0) { | |
3586 | int delay; | |
3587 | int min_delay = | |
3588 | OSPF_LS_REFRESH_TIME - (2 * OSPF_LS_REFRESH_JITTER); | |
3589 | int max_delay = OSPF_LS_REFRESH_TIME - OSPF_LS_REFRESH_JITTER; | |
3590 | ||
3591 | /* We want to refresh the LSA within OSPF_LS_REFRESH_TIME which | |
3592 | * is | |
3593 | * 1800s. Use jitter so that we send the LSA sometime between | |
3594 | * 1680s | |
3595 | * and 1740s. | |
3596 | */ | |
3597 | delay = (random() % (max_delay - min_delay)) + min_delay; | |
3598 | ||
3599 | current_index = ospf->lsa_refresh_queue.index | |
3600 | + (monotime(NULL) - ospf->lsa_refresher_started) | |
3601 | / OSPF_LSA_REFRESHER_GRANULARITY; | |
3602 | ||
3603 | index = (current_index + delay / OSPF_LSA_REFRESHER_GRANULARITY) | |
3604 | % (OSPF_LSA_REFRESHER_SLOTS); | |
3605 | ||
3606 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
3607 | zlog_debug( | |
3608 | "LSA[Refresh:Type%d:%s]: age %d, added to index %d", | |
3609 | lsa->data->type, inet_ntoa(lsa->data->id), | |
3610 | LS_AGE(lsa), index); | |
3611 | ||
3612 | if (!ospf->lsa_refresh_queue.qs[index]) | |
3613 | ospf->lsa_refresh_queue.qs[index] = list_new(); | |
3614 | ||
3615 | listnode_add(ospf->lsa_refresh_queue.qs[index], | |
3616 | ospf_lsa_lock(lsa)); /* lsa_refresh_queue */ | |
3617 | lsa->refresh_list = index; | |
3618 | ||
3619 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
3620 | zlog_debug( | |
3621 | "LSA[Refresh:Type%d:%s]: ospf_refresher_register_lsa(): " | |
3622 | "setting refresh_list on lsa %p (slod %d)", | |
3623 | lsa->data->type, inet_ntoa(lsa->data->id), | |
3624 | (void *)lsa, index); | |
3625 | } | |
3626 | } | |
3627 | ||
3628 | void ospf_refresher_unregister_lsa(struct ospf *ospf, struct ospf_lsa *lsa) | |
3629 | { | |
3630 | assert(lsa->lock > 0); | |
3631 | assert(IS_LSA_SELF(lsa)); | |
3632 | if (lsa->refresh_list >= 0) { | |
3633 | struct list *refresh_list = | |
3634 | ospf->lsa_refresh_queue.qs[lsa->refresh_list]; | |
3635 | listnode_delete(refresh_list, lsa); | |
3636 | if (!listcount(refresh_list)) { | |
acdf5e25 | 3637 | list_delete_and_null(&refresh_list); |
d62a17ae | 3638 | ospf->lsa_refresh_queue.qs[lsa->refresh_list] = NULL; |
3639 | } | |
3640 | ospf_lsa_unlock(&lsa); /* lsa_refresh_queue */ | |
3641 | lsa->refresh_list = -1; | |
3642 | } | |
3643 | } | |
3644 | ||
3645 | int ospf_lsa_refresh_walker(struct thread *t) | |
3646 | { | |
3647 | struct list *refresh_list; | |
3648 | struct listnode *node, *nnode; | |
3649 | struct ospf *ospf = THREAD_ARG(t); | |
3650 | struct ospf_lsa *lsa; | |
3651 | int i; | |
3652 | struct list *lsa_to_refresh = list_new(); | |
3653 | ||
3654 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
3655 | zlog_debug("LSA[Refresh]: ospf_lsa_refresh_walker(): start"); | |
3656 | ||
3657 | ||
3658 | i = ospf->lsa_refresh_queue.index; | |
3659 | ||
3660 | /* Note: if clock has jumped backwards, then time change could be | |
3661 | negative, | |
3662 | so we are careful to cast the expression to unsigned before taking | |
3663 | modulus. */ | |
3664 | ospf->lsa_refresh_queue.index = | |
3665 | ((unsigned long)(ospf->lsa_refresh_queue.index | |
3666 | + (monotime(NULL) | |
3667 | - ospf->lsa_refresher_started) | |
3668 | / OSPF_LSA_REFRESHER_GRANULARITY)) | |
3669 | % OSPF_LSA_REFRESHER_SLOTS; | |
3670 | ||
3671 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
3672 | zlog_debug( | |
3673 | "LSA[Refresh]: ospf_lsa_refresh_walker(): next index %d", | |
3674 | ospf->lsa_refresh_queue.index); | |
3675 | ||
3676 | for (; i != ospf->lsa_refresh_queue.index; | |
3677 | i = (i + 1) % OSPF_LSA_REFRESHER_SLOTS) { | |
3678 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
3679 | zlog_debug( | |
3680 | "LSA[Refresh]: ospf_lsa_refresh_walker(): " | |
3681 | "refresh index %d", | |
3682 | i); | |
3683 | ||
3684 | refresh_list = ospf->lsa_refresh_queue.qs[i]; | |
3685 | ||
3686 | assert(i >= 0); | |
3687 | ||
3688 | ospf->lsa_refresh_queue.qs[i] = NULL; | |
3689 | ||
3690 | if (refresh_list) { | |
3691 | for (ALL_LIST_ELEMENTS(refresh_list, node, nnode, | |
3692 | lsa)) { | |
3693 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
3694 | zlog_debug( | |
3695 | "LSA[Refresh:Type%d:%s]: ospf_lsa_refresh_walker(): " | |
3696 | "refresh lsa %p (slot %d)", | |
3697 | lsa->data->type, | |
3698 | inet_ntoa(lsa->data->id), | |
3699 | (void *)lsa, i); | |
3700 | ||
3701 | assert(lsa->lock > 0); | |
3702 | list_delete_node(refresh_list, node); | |
3703 | lsa->refresh_list = -1; | |
3704 | listnode_add(lsa_to_refresh, lsa); | |
3705 | } | |
acdf5e25 | 3706 | list_delete_and_null(&refresh_list); |
d62a17ae | 3707 | } |
3708 | } | |
3709 | ||
3710 | ospf->t_lsa_refresher = NULL; | |
3711 | thread_add_timer(master, ospf_lsa_refresh_walker, ospf, | |
3712 | ospf->lsa_refresh_interval, &ospf->t_lsa_refresher); | |
3713 | ospf->lsa_refresher_started = monotime(NULL); | |
3714 | ||
3715 | for (ALL_LIST_ELEMENTS(lsa_to_refresh, node, nnode, lsa)) { | |
3716 | ospf_lsa_refresh(ospf, lsa); | |
3717 | assert(lsa->lock > 0); | |
3718 | ospf_lsa_unlock( | |
3719 | &lsa); /* lsa_refresh_queue & temp for lsa_to_refresh*/ | |
3720 | } | |
3721 | ||
affe9e99 | 3722 | list_delete_and_null(&lsa_to_refresh); |
d62a17ae | 3723 | |
3724 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
3725 | zlog_debug("LSA[Refresh]: ospf_lsa_refresh_walker(): end"); | |
3726 | ||
3727 | return 0; | |
3728 | } |