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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
718e3744 | 2 | /* |
3 | * OSPF Link State Advertisement | |
4 | * Copyright (C) 1999, 2000 Toshiaki Takada | |
718e3744 | 5 | */ |
6 | ||
7 | #include <zebra.h> | |
8 | ||
cbf3e3eb | 9 | #include "monotime.h" |
718e3744 | 10 | #include "linklist.h" |
11 | #include "prefix.h" | |
12 | #include "if.h" | |
13 | #include "table.h" | |
14 | #include "memory.h" | |
15 | #include "stream.h" | |
16 | #include "log.h" | |
24a58196 | 17 | #include "frrevent.h" |
718e3744 | 18 | #include "hash.h" |
d62a17ae | 19 | #include "sockunion.h" /* for inet_aton() */ |
6a270cd9 | 20 | #include "checksum.h" |
5920b3eb | 21 | #include "network.h" |
718e3744 | 22 | |
23 | #include "ospfd/ospfd.h" | |
24 | #include "ospfd/ospf_interface.h" | |
25 | #include "ospfd/ospf_ism.h" | |
26 | #include "ospfd/ospf_asbr.h" | |
27 | #include "ospfd/ospf_lsa.h" | |
28 | #include "ospfd/ospf_lsdb.h" | |
29 | #include "ospfd/ospf_neighbor.h" | |
30 | #include "ospfd/ospf_nsm.h" | |
31 | #include "ospfd/ospf_flood.h" | |
32 | #include "ospfd/ospf_packet.h" | |
33 | #include "ospfd/ospf_spf.h" | |
34 | #include "ospfd/ospf_dump.h" | |
35 | #include "ospfd/ospf_route.h" | |
36 | #include "ospfd/ospf_ase.h" | |
37 | #include "ospfd/ospf_zebra.h" | |
493472ba | 38 | #include "ospfd/ospf_abr.h" |
542a208f | 39 | #include "ospfd/ospf_errors.h" |
6b0655a2 | 40 | |
e6f3d081 | 41 | static struct ospf_lsa *ospf_handle_summarylsa_lsId_chg(struct ospf_area *area, |
a8c22275 | 42 | struct prefix_ipv4 *p, |
43 | uint8_t type, | |
44 | uint32_t metric, | |
45 | struct in_addr old_id); | |
46 | static struct ospf_lsa * | |
47 | ospf_summary_lsa_prepare_and_flood(struct prefix_ipv4 *p, uint32_t metric, | |
48 | struct ospf_area *area, struct in_addr id); | |
49 | static struct ospf_lsa *ospf_summary_lsa_refresh(struct ospf *ospf, | |
50 | struct ospf_lsa *lsa); | |
51 | static struct ospf_lsa * | |
52 | ospf_asbr_summary_lsa_prepare_and_flood(struct prefix_ipv4 *p, uint32_t metric, | |
53 | struct ospf_area *area, | |
54 | struct in_addr id); | |
55 | static struct ospf_lsa *ospf_summary_asbr_lsa_refresh(struct ospf *ospf, | |
56 | struct ospf_lsa *lsa); | |
57 | static struct ospf_lsa *ospf_handle_exnl_lsa_lsId_chg(struct ospf *ospf, | |
58 | struct external_info *ei, | |
59 | struct in_addr id); | |
60 | static struct ospf_lsa * | |
61 | ospf_exnl_lsa_prepare_and_flood(struct ospf *ospf, struct external_info *ei, | |
62 | struct in_addr id); | |
63 | ||
d7c0a89a | 64 | uint32_t get_metric(uint8_t *metric) |
718e3744 | 65 | { |
d7c0a89a | 66 | uint32_t m; |
d62a17ae | 67 | m = metric[0]; |
68 | m = (m << 8) + metric[1]; | |
69 | m = (m << 8) + metric[2]; | |
70 | return m; | |
718e3744 | 71 | } |
72 | ||
516c4c66 MN |
73 | /** @brief The Function checks self generated DoNotAge. |
74 | * @param lsa pointer. | |
75 | * @return true or false. | |
76 | */ | |
77 | bool ospf_check_dna_lsa(const struct ospf_lsa *lsa) | |
78 | { | |
79 | return ((IS_LSA_SELF(lsa) && CHECK_FLAG(lsa->data->ls_age, DO_NOT_AGE)) | |
80 | ? true | |
81 | : false); | |
82 | } | |
6b0655a2 | 83 | |
d62a17ae | 84 | struct timeval int2tv(int a) |
b6927875 | 85 | { |
d62a17ae | 86 | struct timeval ret; |
b6927875 | 87 | |
d62a17ae | 88 | ret.tv_sec = a; |
89 | ret.tv_usec = 0; | |
b6927875 | 90 | |
d62a17ae | 91 | return ret; |
b6927875 DS |
92 | } |
93 | ||
d62a17ae | 94 | struct timeval msec2tv(int a) |
718e3744 | 95 | { |
d62a17ae | 96 | struct timeval ret; |
718e3744 | 97 | |
d62a17ae | 98 | ret.tv_sec = a / 1000; |
99 | ret.tv_usec = (a % 1000) * 1000; | |
718e3744 | 100 | |
d62a17ae | 101 | return ret; |
718e3744 | 102 | } |
103 | ||
d62a17ae | 104 | int ospf_lsa_refresh_delay(struct ospf_lsa *lsa) |
718e3744 | 105 | { |
d62a17ae | 106 | struct timeval delta; |
107 | int delay = 0; | |
718e3744 | 108 | |
d62a17ae | 109 | if (monotime_since(&lsa->tv_orig, &delta) |
110 | < OSPF_MIN_LS_INTERVAL * 1000LL) { | |
111 | struct timeval minv = msec2tv(OSPF_MIN_LS_INTERVAL); | |
112 | timersub(&minv, &delta, &minv); | |
cbf3e3eb | 113 | |
d62a17ae | 114 | /* TBD: remove padding to full sec, return timeval instead */ |
115 | delay = minv.tv_sec + !!minv.tv_usec; | |
718e3744 | 116 | |
d62a17ae | 117 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) |
118 | zlog_debug( | |
96b663a3 MS |
119 | "LSA[Type%d:%pI4]: Refresh timer delay %d seconds", |
120 | lsa->data->type, &lsa->data->id, | |
d62a17ae | 121 | delay); |
718e3744 | 122 | |
d62a17ae | 123 | assert(delay > 0); |
124 | } | |
718e3744 | 125 | |
d62a17ae | 126 | return delay; |
718e3744 | 127 | } |
128 | ||
6b0655a2 | 129 | |
d62a17ae | 130 | int get_age(struct ospf_lsa *lsa) |
718e3744 | 131 | { |
d62a17ae | 132 | struct timeval rel; |
718e3744 | 133 | |
516c4c66 MN |
134 | /* As per rfc4136, the self-originated LSAs in their |
135 | * own database keep aging, however rfc doesn't tell | |
136 | * till how long the LSA should be aged, as of now | |
137 | * we are capping it for OSPF_LSA_MAXAGE. | |
138 | */ | |
139 | ||
140 | /* If LSA is marked as donotage */ | |
141 | if (CHECK_FLAG(lsa->data->ls_age, DO_NOT_AGE) && !IS_LSA_SELF(lsa)) | |
142 | return ntohs(lsa->data->ls_age); | |
143 | ||
d62a17ae | 144 | monotime_since(&lsa->tv_recv, &rel); |
145 | return ntohs(lsa->data->ls_age) + rel.tv_sec; | |
718e3744 | 146 | } |
147 | ||
6b0655a2 | 148 | |
718e3744 | 149 | /* Fletcher Checksum -- Refer to RFC1008. */ |
718e3744 | 150 | |
d62a17ae | 151 | /* All the offsets are zero-based. The offsets in the RFC1008 are |
6a270cd9 | 152 | one-based. */ |
d7c0a89a | 153 | uint16_t ospf_lsa_checksum(struct lsa_header *lsa) |
718e3744 | 154 | { |
c4efd0f4 | 155 | uint8_t *buffer = &lsa->options; |
d7c0a89a | 156 | int options_offset = buffer - (uint8_t *)&lsa->ls_age; /* should be 2 */ |
718e3744 | 157 | |
d62a17ae | 158 | /* Skip the AGE field */ |
d7c0a89a | 159 | uint16_t len = ntohs(lsa->length) - options_offset; |
718e3744 | 160 | |
d62a17ae | 161 | /* Checksum offset starts from "options" field, not the beginning of the |
162 | lsa_header struct. The offset is 14, rather than 16. */ | |
d7c0a89a | 163 | int checksum_offset = (uint8_t *)&lsa->checksum - buffer; |
718e3744 | 164 | |
d62a17ae | 165 | return fletcher_checksum(buffer, len, checksum_offset); |
718e3744 | 166 | } |
167 | ||
d62a17ae | 168 | int ospf_lsa_checksum_valid(struct lsa_header *lsa) |
d8a4e42b | 169 | { |
c4efd0f4 | 170 | uint8_t *buffer = &lsa->options; |
d7c0a89a | 171 | int options_offset = buffer - (uint8_t *)&lsa->ls_age; /* should be 2 */ |
d8a4e42b | 172 | |
d62a17ae | 173 | /* Skip the AGE field */ |
d7c0a89a | 174 | uint16_t len = ntohs(lsa->length) - options_offset; |
d8a4e42b | 175 | |
d62a17ae | 176 | return (fletcher_checksum(buffer, len, FLETCHER_CHECKSUM_VALIDATE) |
177 | == 0); | |
d8a4e42b JR |
178 | } |
179 | ||
718e3744 | 180 | |
718e3744 | 181 | /* Create OSPF LSA. */ |
4d762f26 | 182 | struct ospf_lsa *ospf_lsa_new(void) |
718e3744 | 183 | { |
d62a17ae | 184 | struct ospf_lsa *new; |
718e3744 | 185 | |
d62a17ae | 186 | new = XCALLOC(MTYPE_OSPF_LSA, sizeof(struct ospf_lsa)); |
718e3744 | 187 | |
d62a17ae | 188 | new->flags = 0; |
189 | new->lock = 1; | |
190 | new->retransmit_counter = 0; | |
191 | monotime(&new->tv_recv); | |
192 | new->tv_orig = new->tv_recv; | |
193 | new->refresh_list = -1; | |
b5a8894d | 194 | new->vrf_id = VRF_DEFAULT; |
df074ec3 | 195 | new->to_be_acknowledged = 0; |
2f30cb25 | 196 | new->opaque_zero_len_delete = 0; |
d62a17ae | 197 | |
198 | return new; | |
718e3744 | 199 | } |
200 | ||
5b3d4186 DS |
201 | struct ospf_lsa *ospf_lsa_new_and_data(size_t size) |
202 | { | |
203 | struct ospf_lsa *new; | |
204 | ||
205 | new = ospf_lsa_new(); | |
206 | new->data = ospf_lsa_data_new(size); | |
8db278b5 | 207 | new->size = size; |
5b3d4186 DS |
208 | |
209 | return new; | |
210 | } | |
211 | ||
718e3744 | 212 | /* Duplicate OSPF LSA. */ |
d62a17ae | 213 | struct ospf_lsa *ospf_lsa_dup(struct ospf_lsa *lsa) |
718e3744 | 214 | { |
d62a17ae | 215 | struct ospf_lsa *new; |
718e3744 | 216 | |
d62a17ae | 217 | if (lsa == NULL) |
218 | return NULL; | |
718e3744 | 219 | |
d62a17ae | 220 | new = XCALLOC(MTYPE_OSPF_LSA, sizeof(struct ospf_lsa)); |
718e3744 | 221 | |
d62a17ae | 222 | memcpy(new, lsa, sizeof(struct ospf_lsa)); |
223 | UNSET_FLAG(new->flags, OSPF_LSA_DISCARD); | |
224 | new->lock = 1; | |
225 | new->retransmit_counter = 0; | |
226 | new->data = ospf_lsa_data_dup(lsa->data); | |
718e3744 | 227 | |
d62a17ae | 228 | /* kevinm: Clear the refresh_list, otherwise there are going |
229 | to be problems when we try to remove the LSA from the | |
230 | queue (which it's not a member of.) | |
231 | XXX: Should we add the LSA to the refresh_list queue? */ | |
232 | new->refresh_list = -1; | |
f2c80652 | 233 | |
d62a17ae | 234 | if (IS_DEBUG_OSPF(lsa, LSA)) |
235 | zlog_debug("LSA: duplicated %p (new: %p)", (void *)lsa, | |
236 | (void *)new); | |
f2c80652 | 237 | |
d62a17ae | 238 | return new; |
718e3744 | 239 | } |
240 | ||
241 | /* Free OSPF LSA. */ | |
d62a17ae | 242 | void ospf_lsa_free(struct ospf_lsa *lsa) |
718e3744 | 243 | { |
d62a17ae | 244 | assert(lsa->lock == 0); |
245 | ||
246 | if (IS_DEBUG_OSPF(lsa, LSA)) | |
247 | zlog_debug("LSA: freed %p", (void *)lsa); | |
718e3744 | 248 | |
d62a17ae | 249 | /* Delete LSA data. */ |
250 | if (lsa->data != NULL) | |
251 | ospf_lsa_data_free(lsa->data); | |
718e3744 | 252 | |
d62a17ae | 253 | assert(lsa->refresh_list < 0); |
718e3744 | 254 | |
d62a17ae | 255 | memset(lsa, 0, sizeof(struct ospf_lsa)); |
256 | XFREE(MTYPE_OSPF_LSA, lsa); | |
718e3744 | 257 | } |
258 | ||
259 | /* Lock LSA. */ | |
d62a17ae | 260 | struct ospf_lsa *ospf_lsa_lock(struct ospf_lsa *lsa) |
718e3744 | 261 | { |
d62a17ae | 262 | lsa->lock++; |
263 | return lsa; | |
718e3744 | 264 | } |
265 | ||
266 | /* Unlock LSA. */ | |
d62a17ae | 267 | void ospf_lsa_unlock(struct ospf_lsa **lsa) |
718e3744 | 268 | { |
d62a17ae | 269 | /* This is sanity check. */ |
270 | if (!lsa || !*lsa) | |
271 | return; | |
718e3744 | 272 | |
d62a17ae | 273 | (*lsa)->lock--; |
718e3744 | 274 | |
d62a17ae | 275 | assert((*lsa)->lock >= 0); |
276 | ||
277 | if ((*lsa)->lock == 0) { | |
278 | assert(CHECK_FLAG((*lsa)->flags, OSPF_LSA_DISCARD)); | |
279 | ospf_lsa_free(*lsa); | |
280 | *lsa = NULL; | |
281 | } | |
718e3744 | 282 | } |
283 | ||
284 | /* Check discard flag. */ | |
d62a17ae | 285 | void ospf_lsa_discard(struct ospf_lsa *lsa) |
718e3744 | 286 | { |
d62a17ae | 287 | if (!CHECK_FLAG(lsa->flags, OSPF_LSA_DISCARD)) { |
288 | SET_FLAG(lsa->flags, OSPF_LSA_DISCARD); | |
289 | ospf_lsa_unlock(&lsa); | |
290 | } | |
718e3744 | 291 | } |
292 | ||
293 | /* Create LSA data. */ | |
d62a17ae | 294 | struct lsa_header *ospf_lsa_data_new(size_t size) |
718e3744 | 295 | { |
d62a17ae | 296 | return XCALLOC(MTYPE_OSPF_LSA_DATA, size); |
718e3744 | 297 | } |
298 | ||
299 | /* Duplicate LSA data. */ | |
d62a17ae | 300 | struct lsa_header *ospf_lsa_data_dup(struct lsa_header *lsah) |
718e3744 | 301 | { |
d62a17ae | 302 | struct lsa_header *new; |
718e3744 | 303 | |
d62a17ae | 304 | new = ospf_lsa_data_new(ntohs(lsah->length)); |
305 | memcpy(new, lsah, ntohs(lsah->length)); | |
718e3744 | 306 | |
d62a17ae | 307 | return new; |
718e3744 | 308 | } |
309 | ||
310 | /* Free LSA data. */ | |
d62a17ae | 311 | void ospf_lsa_data_free(struct lsa_header *lsah) |
718e3744 | 312 | { |
d62a17ae | 313 | if (IS_DEBUG_OSPF(lsa, LSA)) |
96b663a3 MS |
314 | zlog_debug("LSA[Type%d:%pI4]: data freed %p", lsah->type, |
315 | &lsah->id, (void *)lsah); | |
718e3744 | 316 | |
d62a17ae | 317 | XFREE(MTYPE_OSPF_LSA_DATA, lsah); |
718e3744 | 318 | } |
319 | ||
6b0655a2 | 320 | |
718e3744 | 321 | /* LSA general functions. */ |
322 | ||
d62a17ae | 323 | const char *dump_lsa_key(struct ospf_lsa *lsa) |
718e3744 | 324 | { |
2b64873d | 325 | static char buf[sizeof("Type255,id(255.255.255.255),ar(255.255.255.255)")+1]; |
d62a17ae | 326 | struct lsa_header *lsah; |
718e3744 | 327 | |
d62a17ae | 328 | if (lsa != NULL && (lsah = lsa->data) != NULL) { |
329 | char id[INET_ADDRSTRLEN], ar[INET_ADDRSTRLEN]; | |
96b663a3 MS |
330 | inet_ntop(AF_INET, &lsah->id, id, sizeof(id)); |
331 | inet_ntop(AF_INET, &lsah->adv_router, ar, sizeof(ar)); | |
718e3744 | 332 | |
772270f3 QY |
333 | snprintf(buf, sizeof(buf), "Type%d,id(%s),ar(%s)", lsah->type, |
334 | id, ar); | |
d62a17ae | 335 | } else |
a1d6bbb1 | 336 | strlcpy(buf, "NULL", sizeof(buf)); |
718e3744 | 337 | |
d62a17ae | 338 | return buf; |
718e3744 | 339 | } |
340 | ||
d7c0a89a | 341 | uint32_t lsa_seqnum_increment(struct ospf_lsa *lsa) |
718e3744 | 342 | { |
d7c0a89a | 343 | uint32_t seqnum; |
718e3744 | 344 | |
d62a17ae | 345 | seqnum = ntohl(lsa->data->ls_seqnum) + 1; |
718e3744 | 346 | |
d62a17ae | 347 | return htonl(seqnum); |
718e3744 | 348 | } |
349 | ||
d7c0a89a | 350 | void lsa_header_set(struct stream *s, uint8_t options, uint8_t type, |
d62a17ae | 351 | struct in_addr id, struct in_addr router_id) |
718e3744 | 352 | { |
d62a17ae | 353 | struct lsa_header *lsah; |
718e3744 | 354 | |
d62a17ae | 355 | lsah = (struct lsa_header *)STREAM_DATA(s); |
718e3744 | 356 | |
d62a17ae | 357 | lsah->ls_age = htons(OSPF_LSA_INITIAL_AGE); |
358 | lsah->options = options; | |
359 | lsah->type = type; | |
360 | lsah->id = id; | |
361 | lsah->adv_router = router_id; | |
362 | lsah->ls_seqnum = htonl(OSPF_INITIAL_SEQUENCE_NUMBER); | |
718e3744 | 363 | |
d62a17ae | 364 | stream_forward_endp(s, OSPF_LSA_HEADER_SIZE); |
718e3744 | 365 | } |
6b0655a2 | 366 | |
68980084 | 367 | |
718e3744 | 368 | /* router-LSA related functions. */ |
369 | /* Get router-LSA flags. */ | |
7fd0729f | 370 | uint8_t router_lsa_flags(struct ospf_area *area) |
d62a17ae | 371 | { |
d7c0a89a | 372 | uint8_t flags; |
d62a17ae | 373 | |
374 | flags = area->ospf->flags; | |
375 | ||
376 | /* Set virtual link flag. */ | |
377 | if (ospf_full_virtual_nbrs(area)) | |
378 | SET_FLAG(flags, ROUTER_LSA_VIRTUAL); | |
379 | else | |
380 | /* Just sanity check */ | |
381 | UNSET_FLAG(flags, ROUTER_LSA_VIRTUAL); | |
382 | ||
383 | /* Set Shortcut ABR behabiour flag. */ | |
384 | UNSET_FLAG(flags, ROUTER_LSA_SHORTCUT); | |
385 | if (area->ospf->abr_type == OSPF_ABR_SHORTCUT) | |
386 | if (!OSPF_IS_AREA_BACKBONE(area)) | |
387 | if ((area->shortcut_configured == OSPF_SHORTCUT_DEFAULT | |
388 | && area->ospf->backbone == NULL) | |
389 | || area->shortcut_configured | |
390 | == OSPF_SHORTCUT_ENABLE) | |
391 | SET_FLAG(flags, ROUTER_LSA_SHORTCUT); | |
392 | ||
393 | /* ASBR can't exit in stub area. */ | |
394 | if (area->external_routing == OSPF_AREA_STUB) | |
395 | UNSET_FLAG(flags, ROUTER_LSA_EXTERNAL); | |
396 | /* If ASBR set External flag */ | |
397 | else if (IS_OSPF_ASBR(area->ospf)) | |
398 | SET_FLAG(flags, ROUTER_LSA_EXTERNAL); | |
399 | ||
400 | /* Set ABR dependent flags */ | |
401 | if (IS_OSPF_ABR(area->ospf)) { | |
402 | SET_FLAG(flags, ROUTER_LSA_BORDER); | |
403 | /* If Area is NSSA and we are both ABR and unconditional | |
404 | * translator, | |
405 | * set Nt bit to inform other routers. | |
406 | */ | |
407 | if ((area->external_routing == OSPF_AREA_NSSA) | |
408 | && (area->NSSATranslatorRole == OSPF_NSSA_ROLE_ALWAYS)) | |
409 | SET_FLAG(flags, ROUTER_LSA_NT); | |
410 | } | |
411 | return flags; | |
718e3744 | 412 | } |
413 | ||
414 | /* Lookup neighbor other than myself. | |
415 | And check neighbor count, | |
416 | Point-to-Point link must have only 1 neighbor. */ | |
d62a17ae | 417 | struct ospf_neighbor *ospf_nbr_lookup_ptop(struct ospf_interface *oi) |
718e3744 | 418 | { |
d62a17ae | 419 | struct ospf_neighbor *nbr = NULL; |
420 | struct route_node *rn; | |
718e3744 | 421 | |
d62a17ae | 422 | /* Search neighbor, there must be one of two nbrs. */ |
423 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) | |
424 | if ((nbr = rn->info)) | |
425 | if (!IPV4_ADDR_SAME(&nbr->router_id, | |
426 | &oi->ospf->router_id)) | |
427 | if (nbr->state == NSM_Full) { | |
428 | route_unlock_node(rn); | |
429 | break; | |
430 | } | |
718e3744 | 431 | |
d62a17ae | 432 | /* PtoP link must have only 1 neighbor. */ |
433 | if (ospf_nbr_count(oi, 0) > 1) | |
bf8d8a54 JAG |
434 | flog_warn( |
435 | EC_OSPF_PTP_NEIGHBOR, | |
436 | "Point-to-Point link on interface %s has more than 1 neighbor.", | |
437 | oi->ifp->name); | |
718e3744 | 438 | |
d62a17ae | 439 | return nbr; |
718e3744 | 440 | } |
441 | ||
88d6cf37 | 442 | /* Determine cost of link, taking RFC3137 stub-router support into |
443 | * consideration | |
444 | */ | |
d7c0a89a | 445 | static uint16_t ospf_link_cost(struct ospf_interface *oi) |
88d6cf37 | 446 | { |
d62a17ae | 447 | /* RFC3137 stub router support */ |
448 | if (!CHECK_FLAG(oi->area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED)) | |
449 | return oi->output_cost; | |
450 | else | |
451 | return OSPF_OUTPUT_COST_INFINITE; | |
88d6cf37 | 452 | } |
453 | ||
718e3744 | 454 | /* Set a link information. */ |
7fd0729f G |
455 | char link_info_set(struct stream **s, struct in_addr id, struct in_addr data, |
456 | uint8_t type, uint8_t tos, uint16_t cost) | |
d62a17ae | 457 | { |
458 | /* LSA stream is initially allocated to OSPF_MAX_LSA_SIZE, suits | |
459 | * vast majority of cases. Some rare routers with lots of links need | |
460 | * more. | |
f5267398 | 461 | * we try accommodate those here. |
d62a17ae | 462 | */ |
db3c830a | 463 | if (STREAM_WRITEABLE(*s) < OSPF_ROUTER_LSA_LINK_SIZE) { |
d62a17ae | 464 | size_t ret = OSPF_MAX_LSA_SIZE; |
465 | ||
466 | /* Can we enlarge the stream still? */ | |
db3c830a | 467 | if (STREAM_SIZE(*s) == OSPF_MAX_LSA_SIZE) { |
d62a17ae | 468 | /* we futz the size here for simplicity, really we need |
469 | * to account | |
470 | * for just: | |
0d6f7fd6 | 471 | * IP Header - (sizeof(struct ip)) |
d62a17ae | 472 | * OSPF Header - OSPF_HEADER_SIZE |
473 | * LSA Header - OSPF_LSA_HEADER_SIZE | |
474 | * MD5 auth data, if MD5 is configured - | |
475 | * OSPF_AUTH_MD5_SIZE. | |
476 | * | |
477 | * Simpler just to subtract OSPF_MAX_LSA_SIZE though. | |
478 | */ | |
db3c830a | 479 | ret = stream_resize_inplace( |
9d303b37 | 480 | s, OSPF_MAX_PACKET_SIZE - OSPF_MAX_LSA_SIZE); |
d62a17ae | 481 | } |
482 | ||
483 | if (ret == OSPF_MAX_LSA_SIZE) { | |
13ab4921 | 484 | flog_warn( |
cf444bcf | 485 | EC_OSPF_LSA_SIZE, |
d62a17ae | 486 | "%s: Out of space in LSA stream, left %zd, size %zd", |
db3c830a DS |
487 | __func__, STREAM_WRITEABLE(*s), |
488 | STREAM_SIZE(*s)); | |
d62a17ae | 489 | return 0; |
490 | } | |
491 | } | |
492 | ||
493 | /* TOS based routing is not supported. */ | |
db3c830a DS |
494 | stream_put_ipv4(*s, id.s_addr); /* Link ID. */ |
495 | stream_put_ipv4(*s, data.s_addr); /* Link Data. */ | |
496 | stream_putc(*s, type); /* Link Type. */ | |
497 | stream_putc(*s, tos); /* TOS = 0. */ | |
498 | stream_putw(*s, cost); /* Link Cost. */ | |
d62a17ae | 499 | |
500 | return 1; | |
718e3744 | 501 | } |
502 | ||
e4529636 | 503 | /* Describe Point-to-Point link (Section 12.4.1.1). */ |
bc97889b AL |
504 | |
505 | /* Note: If the interface is configured as point-to-point dmvpn then the other | |
506 | * end of link is dmvpn hub with point-to-multipoint ospf network type. The | |
507 | * hub then expects this router to populate the stub network and also Link Data | |
508 | * Field set to IP Address and not MIB-II ifIndex | |
509 | */ | |
db3c830a | 510 | static int lsa_link_ptop_set(struct stream **s, struct ospf_interface *oi) |
d62a17ae | 511 | { |
512 | int links = 0; | |
513 | struct ospf_neighbor *nbr; | |
514 | struct in_addr id, mask, data; | |
d7c0a89a | 515 | uint16_t cost = ospf_link_cost(oi); |
d62a17ae | 516 | |
517 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
518 | zlog_debug("LSA[Type1]: Set link Point-to-Point"); | |
519 | ||
520 | if ((nbr = ospf_nbr_lookup_ptop(oi))) | |
521 | if (nbr->state == NSM_Full) { | |
522 | if (CHECK_FLAG(oi->connected->flags, | |
bc97889b AL |
523 | ZEBRA_IFA_UNNUMBERED) |
524 | && !oi->ptp_dmvpn) { | |
d62a17ae | 525 | /* For unnumbered point-to-point networks, the |
526 | Link Data field | |
527 | should specify the interface's MIB-II ifIndex | |
528 | value. */ | |
529 | data.s_addr = htonl(oi->ifp->ifindex); | |
530 | links += link_info_set( | |
531 | s, nbr->router_id, data, | |
532 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
533 | } else { | |
534 | links += link_info_set( | |
535 | s, nbr->router_id, | |
536 | oi->address->u.prefix4, | |
537 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
538 | } | |
539 | } | |
540 | ||
541 | /* no need for a stub link for unnumbered interfaces */ | |
bc97889b AL |
542 | if (oi->ptp_dmvpn |
543 | || !CHECK_FLAG(oi->connected->flags, ZEBRA_IFA_UNNUMBERED)) { | |
d62a17ae | 544 | /* Regardless of the state of the neighboring router, we must |
545 | add a Type 3 link (stub network). | |
546 | N.B. Options 1 & 2 share basically the same logic. */ | |
547 | masklen2ip(oi->address->prefixlen, &mask); | |
548 | id.s_addr = CONNECTED_PREFIX(oi->connected)->u.prefix4.s_addr | |
549 | & mask.s_addr; | |
550 | links += link_info_set(s, id, mask, LSA_LINK_TYPE_STUB, 0, | |
551 | oi->output_cost); | |
552 | } | |
553 | ||
554 | return links; | |
718e3744 | 555 | } |
556 | ||
557 | /* Describe Broadcast Link. */ | |
db3c830a | 558 | static int lsa_link_broadcast_set(struct stream **s, struct ospf_interface *oi) |
d62a17ae | 559 | { |
560 | struct ospf_neighbor *dr; | |
561 | struct in_addr id, mask; | |
d7c0a89a | 562 | uint16_t cost = ospf_link_cost(oi); |
d62a17ae | 563 | |
564 | /* Describe Type 3 Link. */ | |
565 | if (oi->state == ISM_Waiting) { | |
566 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
567 | zlog_debug( | |
3efd0893 | 568 | "LSA[Type1]: Interface %s is in state Waiting. Adding stub interface", |
d62a17ae | 569 | oi->ifp->name); |
570 | masklen2ip(oi->address->prefixlen, &mask); | |
571 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
572 | return link_info_set(s, id, mask, LSA_LINK_TYPE_STUB, 0, | |
573 | oi->output_cost); | |
574 | } | |
575 | ||
576 | dr = ospf_nbr_lookup_by_addr(oi->nbrs, &DR(oi)); | |
577 | /* Describe Type 2 link. */ | |
9d303b37 DL |
578 | if (dr && (dr->state == NSM_Full |
579 | || IPV4_ADDR_SAME(&oi->address->u.prefix4, &DR(oi))) | |
d62a17ae | 580 | && ospf_nbr_count(oi, NSM_Full) > 0) { |
581 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
582 | zlog_debug( | |
3efd0893 | 583 | "LSA[Type1]: Interface %s has a DR. Adding transit interface", |
d62a17ae | 584 | oi->ifp->name); |
585 | return link_info_set(s, DR(oi), oi->address->u.prefix4, | |
586 | LSA_LINK_TYPE_TRANSIT, 0, cost); | |
587 | } | |
588 | /* Describe type 3 link. */ | |
589 | else { | |
590 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
591 | zlog_debug( | |
3efd0893 | 592 | "LSA[Type1]: Interface %s has no DR. Adding stub interface", |
d62a17ae | 593 | oi->ifp->name); |
594 | masklen2ip(oi->address->prefixlen, &mask); | |
595 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
596 | return link_info_set(s, id, mask, LSA_LINK_TYPE_STUB, 0, | |
597 | oi->output_cost); | |
598 | } | |
599 | } | |
600 | ||
db3c830a | 601 | static int lsa_link_loopback_set(struct stream **s, struct ospf_interface *oi) |
d62a17ae | 602 | { |
603 | struct in_addr id, mask; | |
604 | ||
605 | /* Describe Type 3 Link. */ | |
606 | if (oi->state != ISM_Loopback) | |
607 | return 0; | |
608 | ||
609 | mask.s_addr = 0xffffffff; | |
610 | id.s_addr = oi->address->u.prefix4.s_addr; | |
dd2bc4fb DS |
611 | return link_info_set(s, id, mask, LSA_LINK_TYPE_STUB, 0, |
612 | oi->output_cost); | |
718e3744 | 613 | } |
614 | ||
615 | /* Describe Virtual Link. */ | |
db3c830a DS |
616 | static int lsa_link_virtuallink_set(struct stream **s, |
617 | struct ospf_interface *oi) | |
718e3744 | 618 | { |
d62a17ae | 619 | struct ospf_neighbor *nbr; |
d7c0a89a | 620 | uint16_t cost = ospf_link_cost(oi); |
718e3744 | 621 | |
d62a17ae | 622 | if (oi->state == ISM_PointToPoint) |
623 | if ((nbr = ospf_nbr_lookup_ptop(oi))) | |
624 | if (nbr->state == NSM_Full) { | |
625 | return link_info_set(s, nbr->router_id, | |
626 | oi->address->u.prefix4, | |
627 | LSA_LINK_TYPE_VIRTUALLINK, | |
628 | 0, cost); | |
629 | } | |
718e3744 | 630 | |
d62a17ae | 631 | return 0; |
718e3744 | 632 | } |
633 | ||
634 | #define lsa_link_nbma_set(S,O) lsa_link_broadcast_set (S, O) | |
635 | ||
d62a17ae | 636 | /* this function add for support point-to-multipoint ,see rfc2328 |
7afa08da | 637 | 12.4.1.4.*/ |
638 | /* from "edward rrr" <edward_rrr@hotmail.com> | |
639 | http://marc.theaimsgroup.com/?l=zebra&m=100739222210507&w=2 */ | |
db3c830a | 640 | static int lsa_link_ptomp_set(struct stream **s, struct ospf_interface *oi) |
d62a17ae | 641 | { |
642 | int links = 0; | |
643 | struct route_node *rn; | |
644 | struct ospf_neighbor *nbr = NULL; | |
645 | struct in_addr id, mask; | |
d7c0a89a | 646 | uint16_t cost = ospf_link_cost(oi); |
d62a17ae | 647 | |
648 | mask.s_addr = 0xffffffff; | |
649 | id.s_addr = oi->address->u.prefix4.s_addr; | |
650 | links += link_info_set(s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); | |
651 | ||
652 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
653 | zlog_debug("PointToMultipoint: running ptomultip_set"); | |
654 | ||
655 | /* Search neighbor, */ | |
656 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) | |
657 | if ((nbr = rn->info) != NULL) | |
658 | /* Ignore myself. */ | |
659 | if (!IPV4_ADDR_SAME(&nbr->router_id, | |
660 | &oi->ospf->router_id)) | |
661 | if (nbr->state == NSM_Full) | |
662 | ||
663 | { | |
664 | links += link_info_set( | |
665 | s, nbr->router_id, | |
666 | oi->address->u.prefix4, | |
667 | LSA_LINK_TYPE_POINTOPOINT, 0, | |
668 | cost); | |
669 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
670 | zlog_debug( | |
96b663a3 MS |
671 | "PointToMultipoint: set link to %pI4", |
672 | &oi->address->u.prefix4); | |
d62a17ae | 673 | } |
674 | ||
675 | return links; | |
7afa08da | 676 | } |
677 | ||
718e3744 | 678 | /* Set router-LSA link information. */ |
db3c830a | 679 | static int router_lsa_link_set(struct stream **s, struct ospf_area *area) |
d62a17ae | 680 | { |
681 | struct listnode *node; | |
682 | struct ospf_interface *oi; | |
683 | int links = 0; | |
684 | ||
685 | for (ALL_LIST_ELEMENTS_RO(area->oiflist, node, oi)) { | |
686 | struct interface *ifp = oi->ifp; | |
687 | ||
688 | /* Check interface is up, OSPF is enable. */ | |
689 | if (if_is_operative(ifp)) { | |
690 | if (oi->state != ISM_Down) { | |
691 | oi->lsa_pos_beg = links; | |
692 | /* Describe each link. */ | |
693 | switch (oi->type) { | |
694 | case OSPF_IFTYPE_POINTOPOINT: | |
695 | links += lsa_link_ptop_set(s, oi); | |
696 | break; | |
697 | case OSPF_IFTYPE_BROADCAST: | |
698 | links += lsa_link_broadcast_set(s, oi); | |
699 | break; | |
700 | case OSPF_IFTYPE_NBMA: | |
701 | links += lsa_link_nbma_set(s, oi); | |
702 | break; | |
703 | case OSPF_IFTYPE_POINTOMULTIPOINT: | |
704 | links += lsa_link_ptomp_set(s, oi); | |
705 | break; | |
706 | case OSPF_IFTYPE_VIRTUALLINK: | |
707 | links += | |
708 | lsa_link_virtuallink_set(s, oi); | |
709 | break; | |
710 | case OSPF_IFTYPE_LOOPBACK: | |
711 | links += lsa_link_loopback_set(s, oi); | |
712 | } | |
713 | oi->lsa_pos_end = links; | |
714 | } | |
718e3744 | 715 | } |
718e3744 | 716 | } |
718e3744 | 717 | |
d62a17ae | 718 | return links; |
718e3744 | 719 | } |
720 | ||
721 | /* Set router-LSA body. */ | |
7fd0729f | 722 | void ospf_router_lsa_body_set(struct stream **s, struct ospf_area *area) |
d62a17ae | 723 | { |
724 | unsigned long putp; | |
d7c0a89a | 725 | uint16_t cnt; |
d62a17ae | 726 | |
727 | /* Set flags. */ | |
db3c830a | 728 | stream_putc(*s, router_lsa_flags(area)); |
d62a17ae | 729 | |
730 | /* Set Zero fields. */ | |
db3c830a | 731 | stream_putc(*s, 0); |
d62a17ae | 732 | |
733 | /* Keep pointer to # links. */ | |
db3c830a | 734 | putp = stream_get_endp(*s); |
d62a17ae | 735 | |
736 | /* Forward word */ | |
db3c830a | 737 | stream_putw(*s, 0); |
d62a17ae | 738 | |
739 | /* Set all link information. */ | |
740 | cnt = router_lsa_link_set(s, area); | |
741 | ||
742 | /* Set # of links here. */ | |
db3c830a | 743 | stream_putw_at(*s, putp, cnt); |
d62a17ae | 744 | } |
745 | ||
e6685141 | 746 | static void ospf_stub_router_timer(struct event *t) |
d62a17ae | 747 | { |
e16d030c | 748 | struct ospf_area *area = EVENT_ARG(t); |
d62a17ae | 749 | |
750 | area->t_stub_router = NULL; | |
751 | ||
752 | SET_FLAG(area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
753 | ||
754 | /* clear stub route state and generate router-lsa refresh, don't | |
755 | * clobber an administratively set stub-router state though. | |
756 | */ | |
757 | if (CHECK_FLAG(area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
cc9f21da | 758 | return; |
d62a17ae | 759 | |
760 | UNSET_FLAG(area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
761 | ||
762 | ospf_router_lsa_update_area(area); | |
d62a17ae | 763 | } |
764 | ||
765 | static void ospf_stub_router_check(struct ospf_area *area) | |
766 | { | |
767 | /* area must either be administratively configured to be stub | |
768 | * or startup-time stub-router must be configured and we must in a | |
769 | * pre-stub | |
770 | * state. | |
771 | */ | |
772 | if (CHECK_FLAG(area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) { | |
773 | SET_FLAG(area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
774 | return; | |
775 | } | |
776 | ||
777 | /* not admin-stubbed, check whether startup stubbing is configured and | |
778 | * whether it's not been done yet | |
779 | */ | |
780 | if (CHECK_FLAG(area->stub_router_state, | |
781 | OSPF_AREA_WAS_START_STUB_ROUTED)) | |
782 | return; | |
783 | ||
784 | if (area->ospf->stub_router_startup_time | |
785 | == OSPF_STUB_ROUTER_UNCONFIGURED) { | |
786 | /* stub-router is hence done forever for this area, even if | |
787 | * someone | |
788 | * tries configure it (take effect next restart). | |
789 | */ | |
790 | SET_FLAG(area->stub_router_state, | |
791 | OSPF_AREA_WAS_START_STUB_ROUTED); | |
792 | return; | |
793 | } | |
794 | ||
795 | /* startup stub-router configured and not yet done */ | |
796 | SET_FLAG(area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
797 | ||
798 | OSPF_AREA_TIMER_ON(area->t_stub_router, ospf_stub_router_timer, | |
799 | area->ospf->stub_router_startup_time); | |
800 | } | |
801 | ||
718e3744 | 802 | /* Create new router-LSA. */ |
d62a17ae | 803 | static struct ospf_lsa *ospf_router_lsa_new(struct ospf_area *area) |
804 | { | |
805 | struct ospf *ospf = area->ospf; | |
806 | struct stream *s; | |
807 | struct lsa_header *lsah; | |
808 | struct ospf_lsa *new; | |
809 | int length; | |
810 | ||
811 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
812 | zlog_debug("LSA[Type1]: Create router-LSA instance"); | |
813 | ||
814 | /* check whether stub-router is desired, and if this is the first | |
815 | * router LSA. | |
816 | */ | |
817 | ospf_stub_router_check(area); | |
818 | ||
819 | /* Create a stream for LSA. */ | |
820 | s = stream_new(OSPF_MAX_LSA_SIZE); | |
821 | /* Set LSA common header fields. */ | |
822 | lsa_header_set(s, LSA_OPTIONS_GET(area) | LSA_OPTIONS_NSSA_GET(area), | |
823 | OSPF_ROUTER_LSA, ospf->router_id, ospf->router_id); | |
824 | ||
825 | /* Set router-LSA body fields. */ | |
db3c830a | 826 | ospf_router_lsa_body_set(&s, area); |
d62a17ae | 827 | |
828 | /* Set length. */ | |
829 | length = stream_get_endp(s); | |
830 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
831 | lsah->length = htons(length); | |
832 | ||
833 | /* Now, create OSPF LSA instance. */ | |
5b3d4186 | 834 | new = ospf_lsa_new_and_data(length); |
d62a17ae | 835 | |
836 | new->area = area; | |
837 | SET_FLAG(new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); | |
b5a8894d | 838 | new->vrf_id = area->ospf->vrf_id; |
d62a17ae | 839 | |
840 | /* Copy LSA data to store, discard stream. */ | |
d62a17ae | 841 | memcpy(new->data, lsah, length); |
842 | stream_free(s); | |
843 | ||
844 | return new; | |
718e3744 | 845 | } |
846 | ||
847 | /* Originate Router-LSA. */ | |
d62a17ae | 848 | static struct ospf_lsa *ospf_router_lsa_originate(struct ospf_area *area) |
718e3744 | 849 | { |
d62a17ae | 850 | struct ospf_lsa *new; |
718e3744 | 851 | |
10514170 RW |
852 | if (area->ospf->gr_info.restart_in_progress) { |
853 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
854 | zlog_debug( | |
855 | "LSA[Type%d]: Graceful Restart in progress, don't originate", | |
856 | OSPF_ROUTER_LSA); | |
857 | return NULL; | |
858 | } | |
859 | ||
d62a17ae | 860 | /* Create new router-LSA instance. */ |
861 | if ((new = ospf_router_lsa_new(area)) == NULL) { | |
862 | zlog_err("%s: ospf_router_lsa_new returned NULL", __func__); | |
863 | return NULL; | |
864 | } | |
865 | ||
866 | /* Sanity check. */ | |
975a328e | 867 | if (new->data->adv_router.s_addr == INADDR_ANY) { |
d62a17ae | 868 | if (IS_DEBUG_OSPF_EVENT) |
869 | zlog_debug("LSA[Type1]: AdvRouter is 0, discard"); | |
870 | ospf_lsa_discard(new); | |
871 | return NULL; | |
872 | } | |
718e3744 | 873 | |
d62a17ae | 874 | /* Install LSA to LSDB. */ |
875 | new = ospf_lsa_install(area->ospf, NULL, new); | |
718e3744 | 876 | |
d62a17ae | 877 | /* Update LSA origination count. */ |
878 | area->ospf->lsa_originate_count++; | |
718e3744 | 879 | |
d62a17ae | 880 | /* Flooding new LSA through area. */ |
881 | ospf_flood_through_area(area, NULL, new); | |
718e3744 | 882 | |
d62a17ae | 883 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { |
96b663a3 MS |
884 | zlog_debug("LSA[Type%d:%pI4]: Originate router-LSA %p", |
885 | new->data->type, &new->data->id, | |
d62a17ae | 886 | (void *)new); |
887 | ospf_lsa_header_dump(new->data); | |
888 | } | |
718e3744 | 889 | |
d62a17ae | 890 | return new; |
718e3744 | 891 | } |
892 | ||
893 | /* Refresh router-LSA. */ | |
d62a17ae | 894 | static struct ospf_lsa *ospf_router_lsa_refresh(struct ospf_lsa *lsa) |
895 | { | |
896 | struct ospf_area *area = lsa->area; | |
897 | struct ospf_lsa *new; | |
898 | ||
899 | /* Sanity check. */ | |
900 | assert(lsa->data); | |
718e3744 | 901 | |
d62a17ae | 902 | /* Delete LSA from neighbor retransmit-list. */ |
903 | ospf_ls_retransmit_delete_nbr_area(area, lsa); | |
718e3744 | 904 | |
d62a17ae | 905 | /* Unregister LSA from refresh-list */ |
906 | ospf_refresher_unregister_lsa(area->ospf, lsa); | |
718e3744 | 907 | |
d62a17ae | 908 | /* Create new router-LSA instance. */ |
909 | if ((new = ospf_router_lsa_new(area)) == NULL) { | |
910 | zlog_err("%s: ospf_router_lsa_new returned NULL", __func__); | |
911 | return NULL; | |
912 | } | |
913 | ||
914 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
718e3744 | 915 | |
d62a17ae | 916 | ospf_lsa_install(area->ospf, NULL, new); |
718e3744 | 917 | |
d62a17ae | 918 | /* Flood LSA through area. */ |
919 | ospf_flood_through_area(area, NULL, new); | |
920 | ||
921 | /* Debug logging. */ | |
922 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
96b663a3 MS |
923 | zlog_debug("LSA[Type%d:%pI4]: router-LSA refresh", |
924 | new->data->type, &new->data->id); | |
d62a17ae | 925 | ospf_lsa_header_dump(new->data); |
926 | } | |
718e3744 | 927 | |
d62a17ae | 928 | return NULL; |
718e3744 | 929 | } |
930 | ||
d62a17ae | 931 | int ospf_router_lsa_update_area(struct ospf_area *area) |
718e3744 | 932 | { |
d62a17ae | 933 | if (IS_DEBUG_OSPF_EVENT) |
934 | zlog_debug("[router-LSA]: (router-LSA area update)"); | |
718e3744 | 935 | |
d62a17ae | 936 | /* Now refresh router-LSA. */ |
937 | if (area->router_lsa_self) | |
938 | ospf_lsa_refresh(area->ospf, area->router_lsa_self); | |
939 | /* Newly originate router-LSA. */ | |
940 | else | |
941 | ospf_router_lsa_originate(area); | |
718e3744 | 942 | |
d62a17ae | 943 | return 0; |
718e3744 | 944 | } |
945 | ||
d62a17ae | 946 | int ospf_router_lsa_update(struct ospf *ospf) |
718e3744 | 947 | { |
d62a17ae | 948 | struct listnode *node, *nnode; |
949 | struct ospf_area *area; | |
718e3744 | 950 | |
d62a17ae | 951 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) |
952 | zlog_debug("Timer[router-LSA Update]: (timer expire)"); | |
718e3744 | 953 | |
d62a17ae | 954 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { |
955 | struct ospf_lsa *lsa = area->router_lsa_self; | |
956 | struct router_lsa *rl; | |
957 | const char *area_str; | |
718e3744 | 958 | |
d62a17ae | 959 | /* Keep Area ID string. */ |
960 | area_str = AREA_NAME(area); | |
718e3744 | 961 | |
d62a17ae | 962 | /* If LSA not exist in this Area, originate new. */ |
963 | if (lsa == NULL) { | |
964 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
965 | zlog_debug( | |
966 | "LSA[Type1]: Create router-LSA for Area %s", | |
967 | area_str); | |
718e3744 | 968 | |
d62a17ae | 969 | ospf_router_lsa_originate(area); |
970 | } | |
971 | /* If router-ID is changed, Link ID must change. | |
972 | First flush old LSA, then originate new. */ | |
973 | else if (!IPV4_ADDR_SAME(&lsa->data->id, &ospf->router_id)) { | |
974 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
975 | zlog_debug( | |
96b663a3 | 976 | "LSA[Type%d:%pI4]: Refresh router-LSA for Area %s", |
d62a17ae | 977 | lsa->data->type, |
96b663a3 | 978 | &lsa->data->id, area_str); |
d62a17ae | 979 | ospf_refresher_unregister_lsa(ospf, lsa); |
980 | ospf_lsa_flush_area(lsa, area); | |
981 | ospf_lsa_unlock(&area->router_lsa_self); | |
982 | area->router_lsa_self = NULL; | |
983 | ||
984 | /* Refresh router-LSA, (not install) and flood through | |
985 | * area. */ | |
986 | ospf_router_lsa_update_area(area); | |
987 | } else { | |
988 | rl = (struct router_lsa *)lsa->data; | |
989 | /* Refresh router-LSA, (not install) and flood through | |
990 | * area. */ | |
991 | if (rl->flags != ospf->flags) | |
992 | ospf_router_lsa_update_area(area); | |
993 | } | |
718e3744 | 994 | } |
718e3744 | 995 | |
d62a17ae | 996 | return 0; |
718e3744 | 997 | } |
998 | ||
6b0655a2 | 999 | |
718e3744 | 1000 | /* network-LSA related functions. */ |
1001 | /* Originate Network-LSA. */ | |
d62a17ae | 1002 | static void ospf_network_lsa_body_set(struct stream *s, |
1003 | struct ospf_interface *oi) | |
718e3744 | 1004 | { |
d62a17ae | 1005 | struct in_addr mask; |
1006 | struct route_node *rn; | |
1007 | struct ospf_neighbor *nbr; | |
718e3744 | 1008 | |
d62a17ae | 1009 | masklen2ip(oi->address->prefixlen, &mask); |
1010 | stream_put_ipv4(s, mask.s_addr); | |
718e3744 | 1011 | |
d62a17ae | 1012 | /* The network-LSA lists those routers that are fully adjacent to |
1013 | the Designated Router; each fully adjacent router is identified by | |
1014 | its OSPF Router ID. The Designated Router includes itself in this | |
1015 | list. RFC2328, Section 12.4.2 */ | |
718e3744 | 1016 | |
d62a17ae | 1017 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) |
1018 | if ((nbr = rn->info) != NULL) | |
1019 | if (nbr->state == NSM_Full || nbr == oi->nbr_self) | |
1020 | stream_put_ipv4(s, nbr->router_id.s_addr); | |
718e3744 | 1021 | } |
1022 | ||
d62a17ae | 1023 | static struct ospf_lsa *ospf_network_lsa_new(struct ospf_interface *oi) |
1024 | { | |
1025 | struct stream *s; | |
1026 | struct ospf_lsa *new; | |
1027 | struct lsa_header *lsah; | |
1028 | struct ospf_if_params *oip; | |
1029 | int length; | |
1030 | ||
1031 | /* If there are no neighbours on this network (the net is stub), | |
1032 | the router does not originate network-LSA (see RFC 12.4.2) */ | |
1033 | if (oi->full_nbrs == 0) | |
1034 | return NULL; | |
1035 | ||
1036 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1037 | zlog_debug("LSA[Type2]: Create network-LSA instance"); | |
1038 | ||
1039 | /* Create new stream for LSA. */ | |
1040 | s = stream_new(OSPF_MAX_LSA_SIZE); | |
1041 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
1042 | ||
1043 | lsa_header_set(s, (OPTIONS(oi) | LSA_OPTIONS_GET(oi->area)), | |
1044 | OSPF_NETWORK_LSA, DR(oi), oi->ospf->router_id); | |
1045 | ||
1046 | /* Set network-LSA body fields. */ | |
1047 | ospf_network_lsa_body_set(s, oi); | |
1048 | ||
1049 | /* Set length. */ | |
1050 | length = stream_get_endp(s); | |
1051 | lsah->length = htons(length); | |
1052 | ||
1053 | /* Create OSPF LSA instance. */ | |
5b3d4186 | 1054 | new = ospf_lsa_new_and_data(length); |
d62a17ae | 1055 | |
1056 | new->area = oi->area; | |
1057 | SET_FLAG(new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); | |
b5a8894d | 1058 | new->vrf_id = oi->ospf->vrf_id; |
d62a17ae | 1059 | |
1060 | /* Copy LSA to store. */ | |
d62a17ae | 1061 | memcpy(new->data, lsah, length); |
1062 | stream_free(s); | |
1063 | ||
1064 | /* Remember prior network LSA sequence numbers, even if we stop | |
1065 | * originating one for this oi, to try avoid re-originating LSAs with a | |
1066 | * prior sequence number, and thus speed up adjency forming & | |
1067 | * convergence. | |
1068 | */ | |
1069 | if ((oip = ospf_lookup_if_params(oi->ifp, oi->address->u.prefix4))) { | |
1070 | new->data->ls_seqnum = oip->network_lsa_seqnum; | |
1071 | new->data->ls_seqnum = lsa_seqnum_increment(new); | |
1072 | } else { | |
1073 | oip = ospf_get_if_params(oi->ifp, oi->address->u.prefix4); | |
1074 | ospf_if_update_params(oi->ifp, oi->address->u.prefix4); | |
1075 | } | |
1076 | oip->network_lsa_seqnum = new->data->ls_seqnum; | |
1077 | ||
1078 | return new; | |
718e3744 | 1079 | } |
1080 | ||
1081 | /* Originate network-LSA. */ | |
d62a17ae | 1082 | void ospf_network_lsa_update(struct ospf_interface *oi) |
718e3744 | 1083 | { |
d62a17ae | 1084 | struct ospf_lsa *new; |
718e3744 | 1085 | |
10514170 RW |
1086 | if (oi->area->ospf->gr_info.restart_in_progress) { |
1087 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1088 | zlog_debug( | |
1089 | "LSA[Type%d]: Graceful Restart in progress, don't originate", | |
1090 | OSPF_NETWORK_LSA); | |
1091 | return; | |
1092 | } | |
1093 | ||
d62a17ae | 1094 | if (oi->network_lsa_self != NULL) { |
1095 | ospf_lsa_refresh(oi->ospf, oi->network_lsa_self); | |
1096 | return; | |
1097 | } | |
1098 | ||
1099 | /* Create new network-LSA instance. */ | |
1100 | new = ospf_network_lsa_new(oi); | |
1101 | if (new == NULL) | |
1102 | return; | |
718e3744 | 1103 | |
d62a17ae | 1104 | /* Install LSA to LSDB. */ |
1105 | new = ospf_lsa_install(oi->ospf, oi, new); | |
718e3744 | 1106 | |
d62a17ae | 1107 | /* Update LSA origination count. */ |
1108 | oi->ospf->lsa_originate_count++; | |
718e3744 | 1109 | |
d62a17ae | 1110 | /* Flooding new LSA through area. */ |
1111 | ospf_flood_through_area(oi->area, NULL, new); | |
1112 | ||
1113 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
96b663a3 MS |
1114 | zlog_debug("LSA[Type%d:%pI4]: Originate network-LSA %p", |
1115 | new->data->type, &new->data->id, | |
d62a17ae | 1116 | (void *)new); |
1117 | ospf_lsa_header_dump(new->data); | |
1118 | } | |
718e3744 | 1119 | |
d62a17ae | 1120 | return; |
718e3744 | 1121 | } |
1122 | ||
d62a17ae | 1123 | static struct ospf_lsa *ospf_network_lsa_refresh(struct ospf_lsa *lsa) |
1124 | { | |
1125 | struct ospf_area *area = lsa->area; | |
1126 | struct ospf_lsa *new, *new2; | |
1127 | struct ospf_if_params *oip; | |
1128 | struct ospf_interface *oi; | |
1129 | ||
1130 | assert(lsa->data); | |
1131 | ||
1132 | /* Retrieve the oi for the network LSA */ | |
1133 | oi = ospf_if_lookup_by_local_addr(area->ospf, NULL, lsa->data->id); | |
1134 | if (oi == NULL) { | |
1135 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1136 | zlog_debug( | |
96b663a3 MS |
1137 | "LSA[Type%d:%pI4]: network-LSA refresh: no oi found, ick, ignoring.", |
1138 | lsa->data->type, &lsa->data->id); | |
d62a17ae | 1139 | ospf_lsa_header_dump(lsa->data); |
1140 | } | |
1141 | return NULL; | |
1142 | } | |
516c4c66 MN |
1143 | |
1144 | if (oi->state != ISM_DR) | |
1145 | return NULL; | |
1146 | ||
d62a17ae | 1147 | /* Delete LSA from neighbor retransmit-list. */ |
1148 | ospf_ls_retransmit_delete_nbr_area(area, lsa); | |
1149 | ||
1150 | /* Unregister LSA from refresh-list */ | |
1151 | ospf_refresher_unregister_lsa(area->ospf, lsa); | |
1152 | ||
1153 | /* Create new network-LSA instance. */ | |
1154 | new = ospf_network_lsa_new(oi); | |
1155 | if (new == NULL) | |
1156 | return NULL; | |
1157 | ||
1158 | oip = ospf_lookup_if_params(oi->ifp, oi->address->u.prefix4); | |
1159 | assert(oip != NULL); | |
1160 | oip->network_lsa_seqnum = new->data->ls_seqnum = | |
1161 | lsa_seqnum_increment(lsa); | |
1162 | ||
1163 | new2 = ospf_lsa_install(area->ospf, oi, new); | |
1164 | ||
1165 | assert(new2 == new); | |
1166 | ||
1167 | /* Flood LSA through aera. */ | |
1168 | ospf_flood_through_area(area, NULL, new); | |
1169 | ||
1170 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
96b663a3 MS |
1171 | zlog_debug("LSA[Type%d:%pI4]: network-LSA refresh", |
1172 | new->data->type, &new->data->id); | |
d62a17ae | 1173 | ospf_lsa_header_dump(new->data); |
1174 | } | |
1175 | ||
1176 | return new; | |
1177 | } | |
1178 | ||
d7c0a89a | 1179 | static void stream_put_ospf_metric(struct stream *s, uint32_t metric_value) |
d62a17ae | 1180 | { |
d7c0a89a | 1181 | uint32_t metric; |
d62a17ae | 1182 | char *mp; |
1183 | ||
1184 | /* Put 0 metric. TOS metric is not supported. */ | |
1185 | metric = htonl(metric_value); | |
1186 | mp = (char *)&metric; | |
1187 | mp++; | |
1188 | stream_put(s, mp, 3); | |
718e3744 | 1189 | } |
1190 | ||
1191 | /* summary-LSA related functions. */ | |
d62a17ae | 1192 | static void ospf_summary_lsa_body_set(struct stream *s, struct prefix *p, |
d7c0a89a | 1193 | uint32_t metric) |
718e3744 | 1194 | { |
d62a17ae | 1195 | struct in_addr mask; |
718e3744 | 1196 | |
d62a17ae | 1197 | masklen2ip(p->prefixlen, &mask); |
718e3744 | 1198 | |
d62a17ae | 1199 | /* Put Network Mask. */ |
1200 | stream_put_ipv4(s, mask.s_addr); | |
718e3744 | 1201 | |
d62a17ae | 1202 | /* Set # TOS. */ |
d7c0a89a | 1203 | stream_putc(s, (uint8_t)0); |
718e3744 | 1204 | |
d62a17ae | 1205 | /* Set metric. */ |
1206 | stream_put_ospf_metric(s, metric); | |
718e3744 | 1207 | } |
1208 | ||
d62a17ae | 1209 | static struct ospf_lsa *ospf_summary_lsa_new(struct ospf_area *area, |
d7c0a89a | 1210 | struct prefix *p, uint32_t metric, |
d62a17ae | 1211 | struct in_addr id) |
718e3744 | 1212 | { |
d62a17ae | 1213 | struct stream *s; |
1214 | struct ospf_lsa *new; | |
1215 | struct lsa_header *lsah; | |
1216 | int length; | |
718e3744 | 1217 | |
d62a17ae | 1218 | if (id.s_addr == 0xffffffff) { |
1219 | /* Maybe Link State ID not available. */ | |
1220 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1221 | zlog_debug( | |
1222 | "LSA[Type%d]: Link ID not available, can't originate", | |
1223 | OSPF_SUMMARY_LSA); | |
1224 | return NULL; | |
1225 | } | |
c24d602e | 1226 | |
d62a17ae | 1227 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) |
1228 | zlog_debug("LSA[Type3]: Create summary-LSA instance"); | |
718e3744 | 1229 | |
d62a17ae | 1230 | /* Create new stream for LSA. */ |
1231 | s = stream_new(OSPF_MAX_LSA_SIZE); | |
1232 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
718e3744 | 1233 | |
d62a17ae | 1234 | lsa_header_set(s, LSA_OPTIONS_GET(area), OSPF_SUMMARY_LSA, id, |
1235 | area->ospf->router_id); | |
718e3744 | 1236 | |
d62a17ae | 1237 | /* Set summary-LSA body fields. */ |
1238 | ospf_summary_lsa_body_set(s, p, metric); | |
718e3744 | 1239 | |
d62a17ae | 1240 | /* Set length. */ |
1241 | length = stream_get_endp(s); | |
1242 | lsah->length = htons(length); | |
718e3744 | 1243 | |
d62a17ae | 1244 | /* Create OSPF LSA instance. */ |
5b3d4186 | 1245 | new = ospf_lsa_new_and_data(length); |
d62a17ae | 1246 | new->area = area; |
1247 | SET_FLAG(new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); | |
b5a8894d | 1248 | new->vrf_id = area->ospf->vrf_id; |
718e3744 | 1249 | |
d62a17ae | 1250 | /* Copy LSA to store. */ |
d62a17ae | 1251 | memcpy(new->data, lsah, length); |
1252 | stream_free(s); | |
718e3744 | 1253 | |
d62a17ae | 1254 | return new; |
718e3744 | 1255 | } |
1256 | ||
1257 | /* Originate Summary-LSA. */ | |
a8c22275 | 1258 | static struct ospf_lsa * |
1259 | ospf_summary_lsa_prepare_and_flood(struct prefix_ipv4 *p, uint32_t metric, | |
1260 | struct ospf_area *area, struct in_addr id) | |
d62a17ae | 1261 | { |
1262 | struct ospf_lsa *new; | |
d62a17ae | 1263 | |
1264 | /* Create new summary-LSA instance. */ | |
1265 | if (!(new = ospf_summary_lsa_new(area, (struct prefix *)p, metric, id))) | |
1266 | return NULL; | |
1267 | ||
1268 | /* Instlal LSA to LSDB. */ | |
1269 | new = ospf_lsa_install(area->ospf, NULL, new); | |
1270 | ||
1271 | /* Update LSA origination count. */ | |
1272 | area->ospf->lsa_originate_count++; | |
1273 | ||
1274 | /* Flooding new LSA through area. */ | |
1275 | ospf_flood_through_area(area, NULL, new); | |
1276 | ||
1277 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
96b663a3 MS |
1278 | zlog_debug("LSA[Type%d:%pI4]: Originate summary-LSA %p", |
1279 | new->data->type, &new->data->id, | |
d62a17ae | 1280 | (void *)new); |
1281 | ospf_lsa_header_dump(new->data); | |
1282 | } | |
1283 | ||
1284 | return new; | |
1285 | } | |
1286 | ||
e6f3d081 | 1287 | static struct ospf_lsa *ospf_handle_summarylsa_lsId_chg(struct ospf_area *area, |
a8c22275 | 1288 | struct prefix_ipv4 *p, |
1289 | uint8_t type, | |
1290 | uint32_t metric, | |
1291 | struct in_addr old_id) | |
1292 | { | |
1293 | struct ospf_lsa *lsa = NULL; | |
c8c1a240 | 1294 | struct ospf_lsa *summary_lsa = NULL; |
a8c22275 | 1295 | struct summary_lsa *sl = NULL; |
1296 | struct ospf_area *old_area = NULL; | |
e6f3d081 | 1297 | struct ospf *ospf = area->ospf; |
a8c22275 | 1298 | struct prefix_ipv4 old_prefix; |
1299 | uint32_t old_metric; | |
1300 | struct in_addr mask; | |
1301 | uint32_t metric_val; | |
1302 | char *metric_buf; | |
1303 | ||
e6f3d081 | 1304 | lsa = ospf_lsdb_lookup_by_id(area->lsdb, type, p->prefix, |
a8c22275 | 1305 | ospf->router_id); |
1306 | ||
1307 | if (!lsa) { | |
1308 | flog_warn(EC_OSPF_LSA_NULL, "(%s): LSA not found", __func__); | |
1309 | return NULL; | |
1310 | } | |
1311 | ||
1312 | sl = (struct summary_lsa *)lsa->data; | |
1313 | ||
1314 | old_area = lsa->area; | |
1315 | old_metric = GET_METRIC(sl->metric); | |
1316 | old_prefix.prefix = sl->header.id; | |
1317 | old_prefix.prefixlen = ip_masklen(sl->mask); | |
1318 | old_prefix.family = AF_INET; | |
1319 | ||
1320 | ||
1321 | /* change the mask */ | |
1322 | masklen2ip(p->prefixlen, &mask); | |
1323 | sl->mask.s_addr = mask.s_addr; | |
1324 | ||
1325 | /* Copy the metric*/ | |
1326 | metric_val = htonl(metric); | |
1327 | metric_buf = (char *)&metric_val; | |
1328 | memcpy(sl->metric, metric_buf, sizeof(metric_val)); | |
1329 | ||
1330 | if (type == OSPF_SUMMARY_LSA) { | |
1331 | /*Refresh the LSA with new LSA*/ | |
c8c1a240 | 1332 | summary_lsa = ospf_summary_lsa_refresh(ospf, lsa); |
a8c22275 | 1333 | |
c8c1a240 | 1334 | ospf_summary_lsa_prepare_and_flood(&old_prefix, old_metric, |
1335 | old_area, old_id); | |
a8c22275 | 1336 | } else { |
1337 | /*Refresh the LSA with new LSA*/ | |
c8c1a240 | 1338 | summary_lsa = ospf_summary_asbr_lsa_refresh(ospf, lsa); |
a8c22275 | 1339 | |
c8c1a240 | 1340 | ospf_asbr_summary_lsa_prepare_and_flood(&old_prefix, old_metric, |
1341 | old_area, old_id); | |
a8c22275 | 1342 | } |
1343 | ||
c8c1a240 | 1344 | return summary_lsa; |
a8c22275 | 1345 | } |
1346 | ||
1347 | /* Originate Summary-LSA. */ | |
1348 | struct ospf_lsa *ospf_summary_lsa_originate(struct prefix_ipv4 *p, | |
1349 | uint32_t metric, | |
1350 | struct ospf_area *area) | |
1351 | { | |
1352 | struct in_addr id; | |
1353 | enum lsid_status status; | |
1354 | struct ospf_lsa *new = NULL; | |
1355 | ||
1356 | status = ospf_lsa_unique_id(area->ospf, area->lsdb, OSPF_SUMMARY_LSA, p, | |
1357 | &id); | |
1358 | ||
1359 | if (status == LSID_CHANGE) { | |
1360 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1361 | zlog_debug("Link ID has to be changed."); | |
1362 | ||
e6f3d081 | 1363 | new = ospf_handle_summarylsa_lsId_chg(area, p, OSPF_SUMMARY_LSA, |
1364 | metric, id); | |
a8c22275 | 1365 | return new; |
1366 | } else if (status == LSID_NOT_AVAILABLE) { | |
1367 | /* Link State ID not available. */ | |
1368 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1369 | zlog_debug( | |
1370 | "LSA[Type5]: Link ID not available, can't originate"); | |
1371 | ||
1372 | return NULL; | |
1373 | } | |
1374 | ||
1375 | new = ospf_summary_lsa_prepare_and_flood(p, metric, area, id); | |
1376 | return new; | |
1377 | } | |
1378 | ||
d62a17ae | 1379 | static struct ospf_lsa *ospf_summary_lsa_refresh(struct ospf *ospf, |
1380 | struct ospf_lsa *lsa) | |
1381 | { | |
1382 | struct ospf_lsa *new; | |
1383 | struct summary_lsa *sl; | |
1384 | struct prefix p; | |
1385 | ||
1386 | /* Sanity check. */ | |
1387 | assert(lsa->data); | |
1388 | ||
1389 | sl = (struct summary_lsa *)lsa->data; | |
1390 | p.prefixlen = ip_masklen(sl->mask); | |
1391 | new = ospf_summary_lsa_new(lsa->area, &p, GET_METRIC(sl->metric), | |
1392 | sl->header.id); | |
1393 | ||
1394 | if (!new) | |
1395 | return NULL; | |
1396 | ||
1397 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
1398 | ||
1399 | ospf_lsa_install(ospf, NULL, new); | |
1400 | ||
1401 | /* Flood LSA through AS. */ | |
1402 | ospf_flood_through_area(new->area, NULL, new); | |
1403 | ||
1404 | /* Debug logging. */ | |
1405 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
96b663a3 MS |
1406 | zlog_debug("LSA[Type%d:%pI4]: summary-LSA refresh", |
1407 | new->data->type, &new->data->id); | |
d62a17ae | 1408 | ospf_lsa_header_dump(new->data); |
1409 | } | |
1410 | ||
1411 | return new; | |
718e3744 | 1412 | } |
1413 | ||
6b0655a2 | 1414 | |
718e3744 | 1415 | /* summary-ASBR-LSA related functions. */ |
d62a17ae | 1416 | static void ospf_summary_asbr_lsa_body_set(struct stream *s, struct prefix *p, |
d7c0a89a | 1417 | uint32_t metric) |
718e3744 | 1418 | { |
d62a17ae | 1419 | /* Put Network Mask. */ |
d7c0a89a | 1420 | stream_put_ipv4(s, (uint32_t)0); |
718e3744 | 1421 | |
d62a17ae | 1422 | /* Set # TOS. */ |
d7c0a89a | 1423 | stream_putc(s, (uint8_t)0); |
718e3744 | 1424 | |
d62a17ae | 1425 | /* Set metric. */ |
1426 | stream_put_ospf_metric(s, metric); | |
718e3744 | 1427 | } |
1428 | ||
d62a17ae | 1429 | static struct ospf_lsa *ospf_summary_asbr_lsa_new(struct ospf_area *area, |
1430 | struct prefix *p, | |
d7c0a89a | 1431 | uint32_t metric, |
d62a17ae | 1432 | struct in_addr id) |
718e3744 | 1433 | { |
d62a17ae | 1434 | struct stream *s; |
1435 | struct ospf_lsa *new; | |
1436 | struct lsa_header *lsah; | |
1437 | int length; | |
718e3744 | 1438 | |
d62a17ae | 1439 | if (id.s_addr == 0xffffffff) { |
1440 | /* Maybe Link State ID not available. */ | |
1441 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1442 | zlog_debug( | |
1443 | "LSA[Type%d]: Link ID not available, can't originate", | |
1444 | OSPF_ASBR_SUMMARY_LSA); | |
1445 | return NULL; | |
1446 | } | |
c24d602e | 1447 | |
d62a17ae | 1448 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) |
1449 | zlog_debug("LSA[Type3]: Create summary-LSA instance"); | |
718e3744 | 1450 | |
d62a17ae | 1451 | /* Create new stream for LSA. */ |
1452 | s = stream_new(OSPF_MAX_LSA_SIZE); | |
1453 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
718e3744 | 1454 | |
d62a17ae | 1455 | lsa_header_set(s, LSA_OPTIONS_GET(area), OSPF_ASBR_SUMMARY_LSA, id, |
1456 | area->ospf->router_id); | |
718e3744 | 1457 | |
d62a17ae | 1458 | /* Set summary-LSA body fields. */ |
1459 | ospf_summary_asbr_lsa_body_set(s, p, metric); | |
718e3744 | 1460 | |
d62a17ae | 1461 | /* Set length. */ |
1462 | length = stream_get_endp(s); | |
1463 | lsah->length = htons(length); | |
718e3744 | 1464 | |
d62a17ae | 1465 | /* Create OSPF LSA instance. */ |
5b3d4186 | 1466 | new = ospf_lsa_new_and_data(length); |
d62a17ae | 1467 | new->area = area; |
1468 | SET_FLAG(new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); | |
b5a8894d | 1469 | new->vrf_id = area->ospf->vrf_id; |
718e3744 | 1470 | |
d62a17ae | 1471 | /* Copy LSA to store. */ |
d62a17ae | 1472 | memcpy(new->data, lsah, length); |
1473 | stream_free(s); | |
718e3744 | 1474 | |
d62a17ae | 1475 | return new; |
718e3744 | 1476 | } |
1477 | ||
1478 | /* Originate summary-ASBR-LSA. */ | |
a8c22275 | 1479 | static struct ospf_lsa * |
1480 | ospf_asbr_summary_lsa_prepare_and_flood(struct prefix_ipv4 *p, uint32_t metric, | |
1481 | struct ospf_area *area, | |
1482 | struct in_addr id) | |
d62a17ae | 1483 | { |
1484 | struct ospf_lsa *new; | |
d62a17ae | 1485 | |
1486 | /* Create new summary-LSA instance. */ | |
1487 | new = ospf_summary_asbr_lsa_new(area, (struct prefix *)p, metric, id); | |
1488 | if (!new) | |
1489 | return NULL; | |
1490 | ||
1491 | /* Install LSA to LSDB. */ | |
1492 | new = ospf_lsa_install(area->ospf, NULL, new); | |
718e3744 | 1493 | |
d62a17ae | 1494 | /* Update LSA origination count. */ |
1495 | area->ospf->lsa_originate_count++; | |
718e3744 | 1496 | |
d62a17ae | 1497 | /* Flooding new LSA through area. */ |
1498 | ospf_flood_through_area(area, NULL, new); | |
718e3744 | 1499 | |
d62a17ae | 1500 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { |
96b663a3 MS |
1501 | zlog_debug("LSA[Type%d:%pI4]: Originate summary-ASBR-LSA %p", |
1502 | new->data->type, &new->data->id, | |
d62a17ae | 1503 | (void *)new); |
1504 | ospf_lsa_header_dump(new->data); | |
1505 | } | |
1506 | ||
1507 | return new; | |
1508 | } | |
1509 | ||
a8c22275 | 1510 | struct ospf_lsa *ospf_summary_asbr_lsa_originate(struct prefix_ipv4 *p, |
1511 | uint32_t metric, | |
1512 | struct ospf_area *area) | |
1513 | { | |
1514 | struct ospf_lsa *new; | |
1515 | struct in_addr id; | |
1516 | enum lsid_status status; | |
1517 | ||
1518 | status = ospf_lsa_unique_id(area->ospf, area->lsdb, | |
1519 | OSPF_ASBR_SUMMARY_LSA, p, &id); | |
1520 | ||
1521 | if (status == LSID_CHANGE) { | |
1522 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1523 | zlog_debug("Link ID has to be changed."); | |
1524 | ||
1525 | new = ospf_handle_summarylsa_lsId_chg( | |
e6f3d081 | 1526 | area, p, OSPF_ASBR_SUMMARY_LSA, metric, id); |
a8c22275 | 1527 | return new; |
1528 | } else if (status == LSID_NOT_AVAILABLE) { | |
1529 | /* Link State ID not available. */ | |
1530 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1531 | zlog_debug( | |
1532 | "LSA[Type5]: Link ID not available, can't originate"); | |
1533 | ||
1534 | return NULL; | |
1535 | } | |
1536 | ||
1537 | new = ospf_asbr_summary_lsa_prepare_and_flood(p, metric, area, id); | |
1538 | return new; | |
1539 | } | |
1540 | ||
d62a17ae | 1541 | static struct ospf_lsa *ospf_summary_asbr_lsa_refresh(struct ospf *ospf, |
1542 | struct ospf_lsa *lsa) | |
1543 | { | |
1544 | struct ospf_lsa *new; | |
1545 | struct summary_lsa *sl; | |
1546 | struct prefix p; | |
516c4c66 | 1547 | bool ind_lsa = false; |
d62a17ae | 1548 | |
1549 | /* Sanity check. */ | |
1550 | assert(lsa->data); | |
1551 | ||
516c4c66 MN |
1552 | if (lsa->area->fr_info.indication_lsa_self && |
1553 | (lsa->area->fr_info.indication_lsa_self == lsa)) | |
1554 | ind_lsa = true; | |
1555 | ||
d62a17ae | 1556 | sl = (struct summary_lsa *)lsa->data; |
1557 | p.prefixlen = ip_masklen(sl->mask); | |
1558 | new = ospf_summary_asbr_lsa_new(lsa->area, &p, GET_METRIC(sl->metric), | |
1559 | sl->header.id); | |
1560 | if (!new) | |
1561 | return NULL; | |
1562 | ||
1563 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
1564 | ||
1565 | ospf_lsa_install(ospf, NULL, new); | |
1566 | ||
1567 | /* Flood LSA through area. */ | |
1568 | ospf_flood_through_area(new->area, NULL, new); | |
1569 | ||
516c4c66 MN |
1570 | if (ind_lsa) |
1571 | new->area->fr_info.indication_lsa_self = new; | |
1572 | ||
d62a17ae | 1573 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { |
96b663a3 MS |
1574 | zlog_debug("LSA[Type%d:%pI4]: summary-ASBR-LSA refresh", |
1575 | new->data->type, &new->data->id); | |
d62a17ae | 1576 | ospf_lsa_header_dump(new->data); |
1577 | } | |
1578 | ||
1579 | return new; | |
718e3744 | 1580 | } |
1581 | ||
1582 | /* AS-external-LSA related functions. */ | |
1583 | ||
1584 | /* Get nexthop for AS-external-LSAs. Return nexthop if its interface | |
1585 | is connected, else 0*/ | |
d62a17ae | 1586 | static struct in_addr ospf_external_lsa_nexthop_get(struct ospf *ospf, |
1587 | struct in_addr nexthop) | |
718e3744 | 1588 | { |
d62a17ae | 1589 | struct in_addr fwd; |
1590 | struct prefix nh; | |
1591 | struct listnode *node; | |
1592 | struct ospf_interface *oi; | |
1593 | ||
1594 | fwd.s_addr = 0; | |
718e3744 | 1595 | |
d62a17ae | 1596 | if (!nexthop.s_addr) |
1597 | return fwd; | |
718e3744 | 1598 | |
d62a17ae | 1599 | /* Check whether nexthop is covered by OSPF network. */ |
1600 | nh.family = AF_INET; | |
1601 | nh.u.prefix4 = nexthop; | |
1602 | nh.prefixlen = IPV4_MAX_BITLEN; | |
718e3744 | 1603 | |
d62a17ae | 1604 | /* XXX/SCALE: If there were a lot of oi's on an ifp, then it'd be |
1605 | * better to make use of the per-ifp table of ois. | |
1606 | */ | |
1607 | for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi)) | |
1608 | if (if_is_operative(oi->ifp)) | |
1609 | if (oi->address->family == AF_INET) | |
1610 | if (prefix_match(oi->address, &nh)) | |
1611 | return nexthop; | |
718e3744 | 1612 | |
d62a17ae | 1613 | return fwd; |
718e3744 | 1614 | } |
1615 | ||
718e3744 | 1616 | /* NSSA-external-LSA related functions. */ |
1617 | ||
1618 | /* Get 1st IP connection for Forward Addr */ | |
4dadc291 | 1619 | |
d62a17ae | 1620 | struct in_addr ospf_get_ip_from_ifp(struct ospf_interface *oi) |
718e3744 | 1621 | { |
d62a17ae | 1622 | struct in_addr fwd; |
718e3744 | 1623 | |
975a328e | 1624 | fwd.s_addr = INADDR_ANY; |
718e3744 | 1625 | |
d62a17ae | 1626 | if (if_is_operative(oi->ifp)) |
1627 | return oi->address->u.prefix4; | |
1628 | ||
1629 | return fwd; | |
718e3744 | 1630 | } |
1631 | ||
1632 | /* Get 1st IP connection for Forward Addr */ | |
d62a17ae | 1633 | struct in_addr ospf_get_nssa_ip(struct ospf_area *area) |
1634 | { | |
1635 | struct in_addr fwd; | |
1636 | struct in_addr best_default; | |
1637 | struct listnode *node; | |
1638 | struct ospf_interface *oi; | |
1639 | ||
1640 | fwd.s_addr = 0; | |
1641 | best_default.s_addr = 0; | |
1642 | ||
1643 | for (ALL_LIST_ELEMENTS_RO(area->ospf->oiflist, node, oi)) { | |
1644 | if (if_is_operative(oi->ifp)) | |
1645 | if (oi->area->external_routing == OSPF_AREA_NSSA) | |
1646 | if (oi->address | |
1647 | && oi->address->family == AF_INET) { | |
3a6290bd | 1648 | if (best_default.s_addr == INADDR_ANY) |
d62a17ae | 1649 | best_default = |
1650 | oi->address->u.prefix4; | |
1651 | if (oi->area == area) | |
1652 | return oi->address->u.prefix4; | |
1653 | } | |
1654 | } | |
3a6290bd | 1655 | if (best_default.s_addr != INADDR_ANY) |
d62a17ae | 1656 | return best_default; |
718e3744 | 1657 | |
d62a17ae | 1658 | return fwd; |
718e3744 | 1659 | } |
beebba75 | 1660 | |
d7c0a89a | 1661 | int metric_type(struct ospf *ospf, uint8_t src, unsigned short instance) |
718e3744 | 1662 | { |
d62a17ae | 1663 | struct ospf_redist *red; |
7c8ff89e | 1664 | |
d62a17ae | 1665 | red = ospf_redist_lookup(ospf, src, instance); |
7c8ff89e | 1666 | |
d62a17ae | 1667 | return ((!red || red->dmetric.type < 0) ? DEFAULT_METRIC_TYPE |
1668 | : red->dmetric.type); | |
718e3744 | 1669 | } |
1670 | ||
d7c0a89a | 1671 | int metric_value(struct ospf *ospf, uint8_t src, unsigned short instance) |
718e3744 | 1672 | { |
d62a17ae | 1673 | struct ospf_redist *red; |
7c8ff89e | 1674 | |
d62a17ae | 1675 | red = ospf_redist_lookup(ospf, src, instance); |
1676 | if (!red || red->dmetric.value < 0) { | |
1677 | if (src == DEFAULT_ROUTE) { | |
1678 | if (ospf->default_originate == DEFAULT_ORIGINATE_ZEBRA) | |
1679 | return DEFAULT_DEFAULT_ORIGINATE_METRIC; | |
1680 | else | |
1681 | return DEFAULT_DEFAULT_ALWAYS_METRIC; | |
1682 | } else if (ospf->default_metric < 0) | |
1683 | return DEFAULT_DEFAULT_METRIC; | |
1684 | else | |
1685 | return ospf->default_metric; | |
718e3744 | 1686 | } |
718e3744 | 1687 | |
d62a17ae | 1688 | return red->dmetric.value; |
718e3744 | 1689 | } |
1690 | ||
1691 | /* Set AS-external-LSA body. */ | |
d62a17ae | 1692 | static void ospf_external_lsa_body_set(struct stream *s, |
1693 | struct external_info *ei, | |
1694 | struct ospf *ospf) | |
1695 | { | |
1696 | struct prefix_ipv4 *p = &ei->p; | |
1697 | struct in_addr mask, fwd_addr; | |
d7c0a89a | 1698 | uint32_t mvalue; |
d62a17ae | 1699 | int mtype; |
1700 | int type; | |
d7c0a89a | 1701 | unsigned short instance; |
d62a17ae | 1702 | |
1703 | /* Put Network Mask. */ | |
1704 | masklen2ip(p->prefixlen, &mask); | |
1705 | stream_put_ipv4(s, mask.s_addr); | |
1706 | ||
1707 | /* If prefix is default, specify DEFAULT_ROUTE. */ | |
1fe59b44 RZ |
1708 | type = is_default_prefix4(&ei->p) ? DEFAULT_ROUTE : ei->type; |
1709 | instance = is_default_prefix4(&ei->p) ? 0 : ei->instance; | |
d62a17ae | 1710 | |
1711 | mtype = (ROUTEMAP_METRIC_TYPE(ei) != -1) | |
1712 | ? ROUTEMAP_METRIC_TYPE(ei) | |
1713 | : metric_type(ospf, type, instance); | |
1714 | ||
1715 | mvalue = (ROUTEMAP_METRIC(ei) != -1) | |
1716 | ? ROUTEMAP_METRIC(ei) | |
1717 | : metric_value(ospf, type, instance); | |
1718 | ||
1719 | /* Put type of external metric. */ | |
1720 | stream_putc(s, (mtype == EXTERNAL_METRIC_TYPE_2 ? 0x80 : 0)); | |
1721 | ||
1722 | /* Put 0 metric. TOS metric is not supported. */ | |
1723 | stream_put_ospf_metric(s, mvalue); | |
1724 | ||
1725 | /* Get forwarding address to nexthop if on the Connection List, else 0. | |
1726 | */ | |
1727 | fwd_addr = ospf_external_lsa_nexthop_get(ospf, ei->nexthop); | |
1728 | ||
1729 | /* Put forwarding address. */ | |
1730 | stream_put_ipv4(s, fwd_addr.s_addr); | |
1731 | ||
1732 | /* Put route tag */ | |
1733 | stream_putl(s, ei->tag); | |
718e3744 | 1734 | } |
1735 | ||
1736 | /* Create new external-LSA. */ | |
a8c22275 | 1737 | static struct ospf_lsa * |
1738 | ospf_exnl_lsa_prepare_and_flood(struct ospf *ospf, struct external_info *ei, | |
1739 | struct in_addr id) | |
d62a17ae | 1740 | { |
1741 | struct stream *s; | |
1742 | struct lsa_header *lsah; | |
1743 | struct ospf_lsa *new; | |
d62a17ae | 1744 | int length; |
1745 | ||
d62a17ae | 1746 | /* Create new stream for LSA. */ |
1747 | s = stream_new(OSPF_MAX_LSA_SIZE); | |
1748 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
1749 | ||
1750 | /* Set LSA common header fields. */ | |
1751 | lsa_header_set(s, OSPF_OPTION_E, OSPF_AS_EXTERNAL_LSA, id, | |
1752 | ospf->router_id); | |
1753 | ||
1754 | /* Set AS-external-LSA body fields. */ | |
1755 | ospf_external_lsa_body_set(s, ei, ospf); | |
1756 | ||
1757 | /* Set length. */ | |
1758 | length = stream_get_endp(s); | |
1759 | lsah->length = htons(length); | |
1760 | ||
1761 | /* Now, create OSPF LSA instance. */ | |
5b3d4186 | 1762 | new = ospf_lsa_new_and_data(length); |
d62a17ae | 1763 | new->area = NULL; |
1764 | SET_FLAG(new->flags, | |
1765 | OSPF_LSA_SELF | OSPF_LSA_APPROVED | OSPF_LSA_SELF_CHECKED); | |
b5a8894d | 1766 | new->vrf_id = ospf->vrf_id; |
d62a17ae | 1767 | |
1768 | /* Copy LSA data to store, discard stream. */ | |
d62a17ae | 1769 | memcpy(new->data, lsah, length); |
1770 | stream_free(s); | |
1771 | ||
1772 | return new; | |
718e3744 | 1773 | } |
1774 | ||
a8c22275 | 1775 | static struct ospf_lsa *ospf_handle_exnl_lsa_lsId_chg(struct ospf *ospf, |
1776 | struct external_info *ei, | |
1777 | struct in_addr id) | |
1778 | { | |
1779 | struct ospf_lsa *lsa; | |
1780 | struct as_external_lsa *al; | |
1781 | struct in_addr mask; | |
1782 | struct ospf_lsa *new; | |
c33e80d5 | 1783 | struct external_info ei_summary = {}; |
a8c22275 | 1784 | struct external_info *ei_old; |
1785 | ||
1786 | lsa = ospf_lsdb_lookup_by_id(ospf->lsdb, OSPF_AS_EXTERNAL_LSA, | |
1787 | ei->p.prefix, ospf->router_id); | |
1788 | ||
1789 | if (!lsa) { | |
1790 | flog_warn(EC_OSPF_LSA_NULL, "(%s): LSA not found", __func__); | |
1791 | return NULL; | |
1792 | } | |
1793 | ||
1794 | ei_old = ospf_external_info_check(ospf, lsa); | |
1795 | ||
1796 | al = (struct as_external_lsa *)lsa->data; | |
1797 | ||
1798 | if (!ei_old) { | |
1799 | /* eii_old pointer of LSA is NULL, this | |
1800 | * must be external aggregate route. | |
1801 | */ | |
1802 | ei_summary.p.family = AF_INET; | |
1803 | ei_summary.p.prefix = al->header.id; | |
1804 | ei_summary.p.prefixlen = ip_masklen(al->mask); | |
1805 | ei_summary.tag = (unsigned long)ntohl(al->e[0].route_tag); | |
1806 | ei_old = &ei_summary; | |
1807 | } | |
1808 | ||
1809 | /* change the mask */ | |
1810 | masklen2ip(ei->p.prefixlen, &mask); | |
1811 | al->mask.s_addr = mask.s_addr; | |
1812 | ||
1813 | /*Refresh the LSA with new LSA*/ | |
1814 | ospf_external_lsa_refresh(ospf, lsa, ei, LSA_REFRESH_FORCE, 0); | |
1815 | ||
1816 | /*Originate the old LSA with changed LSID*/ | |
1817 | new = ospf_exnl_lsa_prepare_and_flood(ospf, ei_old, id); | |
1818 | ||
1819 | return new; | |
1820 | } | |
1821 | ||
1822 | static struct ospf_lsa *ospf_external_lsa_new(struct ospf *ospf, | |
1823 | struct external_info *ei, | |
1824 | struct in_addr *old_id) | |
1825 | { | |
1826 | struct ospf_lsa *new; | |
1827 | struct in_addr id; | |
1828 | enum lsid_status status; | |
1829 | ||
1830 | if (ei == NULL) { | |
1831 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1832 | zlog_debug( | |
1833 | "LSA[Type5]: External info is NULL, can't originate"); | |
1834 | return NULL; | |
1835 | } | |
1836 | ||
1837 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1838 | zlog_debug("LSA[Type5]: Originate AS-external-LSA instance"); | |
1839 | ||
1840 | /* If old Link State ID is specified, refresh LSA with same ID. */ | |
1841 | if (old_id) | |
1842 | id = *old_id; | |
1843 | /* Get Link State with unique ID. */ | |
1844 | else { | |
1845 | status = ospf_lsa_unique_id(ospf, ospf->lsdb, | |
1846 | OSPF_AS_EXTERNAL_LSA, &ei->p, &id); | |
1847 | ||
1848 | if (status == LSID_CHANGE) { | |
1849 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1850 | zlog_debug("Link ID has to be changed."); | |
1851 | ||
1852 | new = ospf_handle_exnl_lsa_lsId_chg(ospf, ei, id); | |
1853 | return new; | |
1854 | } else if (status == LSID_NOT_AVAILABLE) { | |
1855 | /* Link State ID not available. */ | |
1856 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1857 | zlog_debug( | |
1858 | "LSA[Type5]: Link ID not available, can't originate"); | |
1859 | return NULL; | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | new = ospf_exnl_lsa_prepare_and_flood(ospf, ei, id); | |
1864 | ||
1865 | return new; | |
1866 | } | |
1867 | ||
718e3744 | 1868 | /* As Type-7 */ |
017714e3 | 1869 | static void ospf_install_flood_nssa(struct ospf *ospf, struct ospf_lsa *lsa) |
d62a17ae | 1870 | { |
1871 | struct ospf_lsa *new; | |
1872 | struct as_external_lsa *extlsa; | |
1873 | struct ospf_area *area; | |
1874 | struct listnode *node, *nnode; | |
1875 | ||
1876 | /* LSA may be a Type-5 originated via translation of a Type-7 LSA | |
1877 | * which originated from an NSSA area. In which case it should not be | |
1878 | * flooded back to NSSA areas. | |
1879 | */ | |
1880 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
1881 | return; | |
1882 | ||
1883 | /* NSSA Originate or Refresh (If anyNSSA) | |
1884 | ||
1885 | LSA is self-originated. And just installed as Type-5. | |
1886 | Additionally, install as Type-7 LSDB for every attached NSSA. | |
1887 | ||
1888 | P-Bit controls which ABR performs translation to outside world; If | |
1889 | we are an ABR....do not set the P-bit, because we send the Type-5, | |
1890 | not as the ABR Translator, but as the ASBR owner within the AS! | |
1891 | ||
1892 | If we are NOT ABR, Flood through NSSA as Type-7 w/P-bit set. The | |
1893 | elected ABR Translator will see the P-bit, Translate, and re-flood. | |
1894 | ||
1895 | Later, ABR_TASK and P-bit will scan Type-7 LSDB and translate to | |
1896 | Type-5's to non-NSSA Areas. (it will also attempt a re-install) */ | |
1897 | ||
1898 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { | |
1899 | /* Don't install Type-7 LSA's into nonNSSA area */ | |
1900 | if (area->external_routing != OSPF_AREA_NSSA) | |
1901 | continue; | |
1902 | ||
1903 | /* make lsa duplicate, lock=1 */ | |
1904 | new = ospf_lsa_dup(lsa); | |
1905 | new->area = area; | |
1906 | new->data->type = OSPF_AS_NSSA_LSA; | |
1907 | ||
1908 | /* set P-bit if not ABR */ | |
1909 | if (!IS_OSPF_ABR(ospf)) { | |
1910 | SET_FLAG(new->data->options, OSPF_OPTION_NP); | |
1911 | ||
1912 | /* set non-zero FWD ADDR | |
1913 | ||
1914 | draft-ietf-ospf-nssa-update-09.txt | |
1915 | ||
1916 | if the network between the NSSA AS boundary router and | |
1917 | the | |
1918 | adjacent AS is advertised into OSPF as an internal OSPF | |
1919 | route, | |
1920 | the forwarding address should be the next op address as | |
1921 | is cu | |
1922 | currently done with type-5 LSAs. If the intervening | |
1923 | network is | |
1924 | not adversited into OSPF as an internal OSPF route and | |
1925 | the | |
1926 | type-7 LSA's P-bit is set a forwarding address should be | |
87bd50e8 | 1927 | selected from one of the router's active OSPF interface |
d62a17ae | 1928 | addresses |
1929 | which belong to the NSSA. If no such addresses exist, | |
1930 | then | |
1931 | no type-7 LSA's with the P-bit set should originate from | |
1932 | this | |
1933 | router. */ | |
1934 | ||
1935 | /* kevinm: not updating lsa anymore, just new */ | |
1936 | extlsa = (struct as_external_lsa *)(new->data); | |
1937 | ||
3a6290bd | 1938 | if (extlsa->e[0].fwd_addr.s_addr == INADDR_ANY) |
d62a17ae | 1939 | extlsa->e[0].fwd_addr = ospf_get_nssa_ip( |
1940 | area); /* this NSSA area in ifp */ | |
1941 | ||
3a6290bd | 1942 | if (extlsa->e[0].fwd_addr.s_addr == INADDR_ANY) { |
d62a17ae | 1943 | if (IS_DEBUG_OSPF_NSSA) |
1944 | zlog_debug( | |
1945 | "LSA[Type-7]: Could not build FWD-ADDR"); | |
1946 | ospf_lsa_discard(new); | |
1947 | return; | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | /* install also as Type-7 */ | |
1952 | ospf_lsa_install(ospf, NULL, | |
1953 | new); /* Remove Old, Lock New = 2 */ | |
1954 | ||
1955 | /* will send each copy, lock=2+n */ | |
1956 | ospf_flood_through_as( | |
1957 | ospf, NULL, new); /* all attached NSSA's, no AS/STUBs */ | |
1958 | } | |
d4a53d58 | 1959 | } |
1960 | ||
d62a17ae | 1961 | static struct ospf_lsa *ospf_lsa_translated_nssa_new(struct ospf *ospf, |
1962 | struct ospf_lsa *type7) | |
1963 | { | |
1964 | ||
1965 | struct ospf_lsa *new; | |
1966 | struct as_external_lsa *ext, *extnew; | |
1967 | struct external_info ei; | |
1968 | ||
1969 | ext = (struct as_external_lsa *)(type7->data); | |
1970 | ||
1971 | /* need external_info struct, fill in bare minimum */ | |
1972 | ei.p.family = AF_INET; | |
1973 | ei.p.prefix = type7->data->id; | |
1974 | ei.p.prefixlen = ip_masklen(ext->mask); | |
1975 | ei.type = ZEBRA_ROUTE_OSPF; | |
1976 | ei.nexthop = ext->header.adv_router; | |
1977 | ei.route_map_set.metric = -1; | |
1978 | ei.route_map_set.metric_type = -1; | |
f61cd36a JAG |
1979 | ei.metric = DEFAULT_DEFAULT_METRIC; |
1980 | ei.max_metric = OSPF_LS_INFINITY; | |
1981 | ei.min_metric = 0; | |
d62a17ae | 1982 | ei.tag = 0; |
12a81f8e | 1983 | ei.instance = 0; |
d62a17ae | 1984 | |
1985 | if ((new = ospf_external_lsa_new(ospf, &ei, &type7->data->id)) | |
1986 | == NULL) { | |
1987 | if (IS_DEBUG_OSPF_NSSA) | |
1988 | zlog_debug( | |
dc135f9e | 1989 | "%s: Could not originate Translated Type-5 for %pI4", |
1990 | __func__, &ei.p.prefix); | |
d62a17ae | 1991 | return NULL; |
1992 | } | |
1993 | ||
1994 | extnew = (struct as_external_lsa *)(new->data); | |
1995 | ||
1996 | /* copy over Type-7 data to new */ | |
1997 | extnew->e[0].tos = ext->e[0].tos; | |
1998 | extnew->e[0].route_tag = ext->e[0].route_tag; | |
c317eddb | 1999 | if (type7->area->suppress_fa) { |
2000 | extnew->e[0].fwd_addr.s_addr = 0; | |
2001 | if (IS_DEBUG_OSPF_NSSA) | |
e6f3b262 | 2002 | zlog_debug("%s: Suppress forwarding address for %pI4", |
2003 | __func__, &ei.p.prefix); | |
c317eddb | 2004 | } else |
2005 | extnew->e[0].fwd_addr.s_addr = ext->e[0].fwd_addr.s_addr; | |
d62a17ae | 2006 | new->data->ls_seqnum = type7->data->ls_seqnum; |
2007 | ||
2008 | /* add translated flag, checksum and lock new lsa */ | |
2009 | SET_FLAG(new->flags, OSPF_LSA_LOCAL_XLT); /* Translated from 7 */ | |
2010 | new = ospf_lsa_lock(new); | |
2011 | ||
2012 | return new; | |
d4a53d58 | 2013 | } |
2014 | ||
d4a53d58 | 2015 | /* Originate Translated Type-5 for supplied Type-7 NSSA LSA */ |
d62a17ae | 2016 | struct ospf_lsa *ospf_translated_nssa_originate(struct ospf *ospf, |
c317eddb | 2017 | struct ospf_lsa *type7, |
2018 | struct ospf_lsa *type5) | |
d62a17ae | 2019 | { |
c0ccfbfd | 2020 | struct ospf_lsa *new, *translated_lsa; |
d62a17ae | 2021 | struct as_external_lsa *extnew; |
2022 | ||
10514170 RW |
2023 | if (ospf->gr_info.restart_in_progress) { |
2024 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
2025 | zlog_debug( | |
2026 | "LSA[Translated Type5]: Graceful Restart in progress, don't originate"); | |
2027 | return NULL; | |
2028 | } | |
2029 | ||
d62a17ae | 2030 | /* we cant use ospf_external_lsa_originate() as we need to set |
2031 | * the OSPF_LSA_LOCAL_XLT flag, must originate by hand | |
2032 | */ | |
2033 | ||
c0ccfbfd K |
2034 | if ((translated_lsa = ospf_lsa_translated_nssa_new(ospf, type7)) == |
2035 | NULL) { | |
d62a17ae | 2036 | if (IS_DEBUG_OSPF_NSSA) |
2037 | zlog_debug( | |
dc135f9e | 2038 | "%s: Could not translate Type-7, Id %pI4, to Type-5", |
2039 | __func__, &type7->data->id); | |
d62a17ae | 2040 | return NULL; |
2041 | } | |
2042 | ||
c0ccfbfd | 2043 | extnew = (struct as_external_lsa *)translated_lsa->data; |
919714bd | 2044 | |
c317eddb | 2045 | /* Update LSA sequence number from translated Type-5 LSA */ |
2046 | if (type5) | |
c0ccfbfd | 2047 | translated_lsa->data->ls_seqnum = lsa_seqnum_increment(type5); |
c317eddb | 2048 | |
c0ccfbfd | 2049 | if ((new = ospf_lsa_install(ospf, NULL, translated_lsa)) == NULL) { |
dc135f9e | 2050 | flog_warn(EC_OSPF_LSA_INSTALL_FAILURE, |
2051 | "%s: Could not install LSA id %pI4", __func__, | |
2052 | &type7->data->id); | |
c0ccfbfd | 2053 | ospf_lsa_free(translated_lsa); |
919714bd | 2054 | return NULL; |
2055 | } | |
d62a17ae | 2056 | |
2057 | if (IS_DEBUG_OSPF_NSSA) { | |
dc135f9e | 2058 | zlog_debug("%s: translated Type 7, installed", __func__); |
d62a17ae | 2059 | ospf_lsa_header_dump(new->data); |
2060 | zlog_debug(" Network mask: %d", ip_masklen(extnew->mask)); | |
96b663a3 MS |
2061 | zlog_debug(" Forward addr: %pI4", |
2062 | &extnew->e[0].fwd_addr); | |
d62a17ae | 2063 | } |
2064 | ||
d62a17ae | 2065 | ospf->lsa_originate_count++; |
2066 | ospf_flood_through_as(ospf, NULL, new); | |
2067 | ||
2068 | return new; | |
d4a53d58 | 2069 | } |
2070 | ||
2071 | /* Refresh Translated from NSSA AS-external-LSA. */ | |
d62a17ae | 2072 | struct ospf_lsa *ospf_translated_nssa_refresh(struct ospf *ospf, |
2073 | struct ospf_lsa *type7, | |
2074 | struct ospf_lsa *type5) | |
2075 | { | |
c0ccfbfd | 2076 | struct ospf_lsa *new = NULL, *translated_lsa = NULL; |
c317eddb | 2077 | struct as_external_lsa *extold = NULL; |
2078 | uint32_t ls_seqnum = 0; | |
d62a17ae | 2079 | |
2080 | /* Sanity checks. */ | |
2081 | assert(type7 || type5); | |
2082 | if (!(type7 || type5)) | |
2083 | return NULL; | |
2084 | if (type7) | |
2085 | assert(type7->data); | |
2086 | if (type5) | |
2087 | assert(type5->data); | |
2088 | assert(ospf->anyNSSA); | |
2089 | ||
2090 | /* get required data according to what has been given */ | |
2091 | if (type7 && type5 == NULL) { | |
2092 | /* find the translated Type-5 for this Type-7 */ | |
2093 | struct as_external_lsa *ext = | |
2094 | (struct as_external_lsa *)(type7->data); | |
2095 | struct prefix_ipv4 p = { | |
2096 | .prefix = type7->data->id, | |
2097 | .prefixlen = ip_masklen(ext->mask), | |
2098 | .family = AF_INET, | |
2099 | }; | |
2100 | ||
2101 | type5 = ospf_external_info_find_lsa(ospf, &p); | |
2102 | } else if (type5 && type7 == NULL) { | |
2103 | /* find the type-7 from which supplied type-5 was translated, | |
2104 | * ie find first type-7 with same LSA Id. | |
2105 | */ | |
2106 | struct listnode *ln, *lnn; | |
2107 | struct route_node *rn; | |
2108 | struct ospf_lsa *lsa; | |
2109 | struct ospf_area *area; | |
2110 | ||
2111 | for (ALL_LIST_ELEMENTS(ospf->areas, ln, lnn, area)) { | |
2112 | if (area->external_routing != OSPF_AREA_NSSA && !type7) | |
2113 | continue; | |
2114 | ||
044506e7 | 2115 | LSDB_LOOP (NSSA_LSDB(area), rn, lsa) { |
d62a17ae | 2116 | if (lsa->data->id.s_addr |
2117 | == type5->data->id.s_addr) { | |
2118 | type7 = lsa; | |
2119 | break; | |
2120 | } | |
2121 | } | |
2122 | } | |
2123 | } | |
2124 | ||
2125 | /* do we have type7? */ | |
2126 | if (!type7) { | |
2127 | if (IS_DEBUG_OSPF_NSSA) | |
e6f3b262 | 2128 | zlog_debug("%s: no Type-7 found for Type-5 LSA Id %pI4", |
2129 | __func__, &type5->data->id); | |
d62a17ae | 2130 | return NULL; |
2131 | } | |
2132 | ||
2133 | /* do we have valid translated type5? */ | |
2134 | if (type5 == NULL || !CHECK_FLAG(type5->flags, OSPF_LSA_LOCAL_XLT)) { | |
2135 | if (IS_DEBUG_OSPF_NSSA) | |
2136 | zlog_debug( | |
e6f3b262 | 2137 | "%s: No translated Type-5 found for Type-7 with Id %pI4", |
2138 | __func__, &type7->data->id); | |
d62a17ae | 2139 | return NULL; |
2140 | } | |
2141 | ||
c317eddb | 2142 | extold = (struct as_external_lsa *)type5->data; |
2143 | if (type7->area->suppress_fa == 1) { | |
2144 | if (extold->e[0].fwd_addr.s_addr == 0) | |
2145 | ls_seqnum = ntohl(type5->data->ls_seqnum); | |
2146 | } | |
2147 | ||
d62a17ae | 2148 | /* Delete LSA from neighbor retransmit-list. */ |
2149 | ospf_ls_retransmit_delete_nbr_as(ospf, type5); | |
2150 | ||
2151 | /* create new translated LSA */ | |
c0ccfbfd K |
2152 | if ((translated_lsa = ospf_lsa_translated_nssa_new(ospf, type7)) == |
2153 | NULL) { | |
d62a17ae | 2154 | if (IS_DEBUG_OSPF_NSSA) |
2155 | zlog_debug( | |
e6f3b262 | 2156 | "%s: Could not translate Type-7 for %pI4 to Type-5", |
2157 | __func__, &type7->data->id); | |
d62a17ae | 2158 | return NULL; |
2159 | } | |
2160 | ||
c317eddb | 2161 | if (type7->area->suppress_fa == 1) { |
2162 | if (extold->e[0].fwd_addr.s_addr == 0) | |
c0ccfbfd | 2163 | translated_lsa->data->ls_seqnum = htonl(ls_seqnum + 1); |
c317eddb | 2164 | } |
2165 | ||
c0ccfbfd | 2166 | if (!(new = ospf_lsa_install(ospf, NULL, translated_lsa))) { |
e6f3b262 | 2167 | flog_warn(EC_OSPF_LSA_INSTALL_FAILURE, |
2168 | "%s: Could not install translated LSA, Id %pI4", | |
2169 | __func__, &type7->data->id); | |
c0ccfbfd | 2170 | ospf_lsa_free(translated_lsa); |
d62a17ae | 2171 | return NULL; |
2172 | } | |
2173 | ||
2174 | /* Flood LSA through area. */ | |
2175 | ospf_flood_through_as(ospf, NULL, new); | |
2176 | ||
2177 | return new; | |
2178 | } | |
2179 | ||
718e3744 | 2180 | /* Originate an AS-external-LSA, install and flood. */ |
d62a17ae | 2181 | struct ospf_lsa *ospf_external_lsa_originate(struct ospf *ospf, |
2182 | struct external_info *ei) | |
2183 | { | |
2184 | struct ospf_lsa *new; | |
2185 | ||
10514170 RW |
2186 | if (ospf->gr_info.restart_in_progress) { |
2187 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
2188 | zlog_debug( | |
2189 | "LSA[Type5]: Graceful Restart in progress, don't originate"); | |
2190 | return NULL; | |
2191 | } | |
2192 | ||
d62a17ae | 2193 | /* Added for NSSA project.... |
2194 | ||
2195 | External LSAs are originated in ASBRs as usual, but for NSSA | |
2196 | systems. | |
2197 | there is the global Type-5 LSDB and a Type-7 LSDB installed for | |
2198 | every area. The Type-7's are flooded to every IR and every ABR; We | |
2199 | install the Type-5 LSDB so that the normal "refresh" code operates | |
2200 | as usual, and flag them as not used during ASE calculations. The | |
2201 | Type-7 LSDB is used for calculations. Each Type-7 has a Forwarding | |
2202 | Address of non-zero. | |
2203 | ||
2204 | If an ABR is the elected NSSA translator, following SPF and during | |
2205 | the ABR task it will translate all the scanned Type-7's, with P-bit | |
2206 | ON and not-self generated, and translate to Type-5's throughout the | |
2207 | non-NSSA/STUB AS. | |
2208 | ||
2209 | A difference in operation depends whether this ASBR is an ABR | |
2210 | or not. If not an ABR, the P-bit is ON, to indicate that any | |
2211 | elected NSSA-ABR can perform its translation. | |
2212 | ||
2213 | If an ABR, the P-bit is OFF; No ABR will perform translation and | |
2214 | this ASBR will flood the Type-5 LSA as usual. | |
2215 | ||
2216 | For the case where this ASBR is not an ABR, the ASE calculations | |
2217 | are based on the Type-5 LSDB; The Type-7 LSDB exists just to | |
2218 | demonstrate to the user that there are LSA's that belong to any | |
2219 | attached NSSA. | |
2220 | ||
2221 | Finally, it just so happens that when the ABR is translating every | |
2222 | Type-7 into Type-5, it installs it into the Type-5 LSDB as an | |
2223 | approved Type-5 (translated from Type-7); at the end of translation | |
2224 | if any Translated Type-5's remain unapproved, then they must be | |
2225 | flushed from the AS. | |
2226 | ||
2227 | */ | |
2228 | ||
975a328e | 2229 | if (ospf->router_id.s_addr == INADDR_ANY) { |
e5309c1a | 2230 | if (ei && IS_DEBUG_OSPF_EVENT) |
975a328e DA |
2231 | zlog_debug( |
2232 | "LSA[Type5:%pI4]: deferring AS-external-LSA origination, router ID is zero", | |
2233 | &ei->p.prefix); | |
f1cf5af6 DL |
2234 | return NULL; |
2235 | } | |
2236 | ||
d62a17ae | 2237 | /* Create new AS-external-LSA instance. */ |
2238 | if ((new = ospf_external_lsa_new(ospf, ei, NULL)) == NULL) { | |
e5309c1a | 2239 | if (ei && IS_DEBUG_OSPF_EVENT) |
d62a17ae | 2240 | zlog_debug( |
96b663a3 MS |
2241 | "LSA[Type5:%pI4]: Could not originate AS-external-LSA", |
2242 | &ei->p.prefix); | |
d62a17ae | 2243 | return NULL; |
2244 | } | |
2245 | ||
2246 | /* Install newly created LSA into Type-5 LSDB, lock = 1. */ | |
2247 | ospf_lsa_install(ospf, NULL, new); | |
2248 | ||
2249 | /* Update LSA origination count. */ | |
2250 | ospf->lsa_originate_count++; | |
2251 | ||
2252 | /* Flooding new LSA. only to AS (non-NSSA/STUB) */ | |
2253 | ospf_flood_through_as(ospf, NULL, new); | |
2254 | ||
2255 | /* If there is any attached NSSA, do special handling */ | |
2256 | if (ospf->anyNSSA && | |
2257 | /* stay away from translated LSAs! */ | |
2258 | !(CHECK_FLAG(new->flags, OSPF_LSA_LOCAL_XLT))) | |
2259 | ospf_install_flood_nssa( | |
017714e3 | 2260 | ospf, new); /* Install/Flood Type-7 to all NSSAs */ |
d62a17ae | 2261 | |
2262 | /* Debug logging. */ | |
2263 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
96b663a3 MS |
2264 | zlog_debug("LSA[Type%d:%pI4]: Originate AS-external-LSA %p", |
2265 | new->data->type, &new->data->id, | |
d62a17ae | 2266 | (void *)new); |
2267 | ospf_lsa_header_dump(new->data); | |
2268 | } | |
2269 | ||
2270 | return new; | |
718e3744 | 2271 | } |
2272 | ||
017714e3 RW |
2273 | /* Originate an NSSA-LSA, install and flood. */ |
2274 | struct ospf_lsa *ospf_nssa_lsa_originate(struct ospf_area *area, | |
2275 | struct external_info *ei) | |
2276 | { | |
2277 | struct ospf *ospf = area->ospf; | |
2278 | struct ospf_lsa *new; | |
2279 | ||
2280 | if (ospf->gr_info.restart_in_progress) { | |
2281 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
2282 | zlog_debug( | |
2283 | "LSA[Type7]: Graceful Restart in progress, don't originate"); | |
2284 | return NULL; | |
2285 | } | |
2286 | ||
2287 | if (ospf->router_id.s_addr == INADDR_ANY) { | |
2288 | if (IS_DEBUG_OSPF_EVENT) | |
2289 | zlog_debug( | |
2290 | "LSA[Type7:%pI4]: deferring NSSA-LSA origination, router ID is zero", | |
2291 | &ei->p.prefix); | |
2292 | return NULL; | |
2293 | } | |
2294 | ||
2295 | /* Create new NSSA-LSA instance. */ | |
2296 | if ((new = ospf_external_lsa_new(ospf, ei, NULL)) == NULL) { | |
2297 | if (IS_DEBUG_OSPF_EVENT) | |
2298 | zlog_debug( | |
2299 | "LSA[Type7:%pI4]: Could not originate NSSA-LSA", | |
2300 | &ei->p.prefix); | |
2301 | return NULL; | |
2302 | } | |
2303 | new->data->type = OSPF_AS_NSSA_LSA; | |
2304 | new->area = area; | |
2305 | ||
2306 | /* Install newly created LSA into Type-7 LSDB. */ | |
2307 | ospf_lsa_install(ospf, NULL, new); | |
2308 | ||
2309 | /* Update LSA origination count. */ | |
2310 | ospf->lsa_originate_count++; | |
2311 | ||
2312 | /* Flooding new LSA */ | |
2313 | ospf_flood_through_area(area, NULL, new); | |
2314 | ||
2315 | /* Debug logging. */ | |
2316 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
2317 | zlog_debug("LSA[Type%d:%pI4]: Originate NSSA-LSA %p", | |
2318 | new->data->type, &new->data->id, (void *)new); | |
2319 | ospf_lsa_header_dump(new->data); | |
2320 | } | |
2321 | ||
2322 | return new; | |
2323 | } | |
2324 | ||
2325 | /* Refresh NSSA-LSA. */ | |
2326 | struct ospf_lsa *ospf_nssa_lsa_refresh(struct ospf_area *area, | |
2327 | struct ospf_lsa *lsa, | |
2328 | struct external_info *ei) | |
2329 | { | |
2330 | struct ospf *ospf = area->ospf; | |
2331 | struct ospf_lsa *new; | |
2332 | ||
2333 | /* Delete LSA from neighbor retransmit-list. */ | |
2334 | ospf_ls_retransmit_delete_nbr_as(ospf, lsa); | |
2335 | ||
2336 | /* Unregister AS-external-LSA from refresh-list. */ | |
2337 | ospf_refresher_unregister_lsa(ospf, lsa); | |
2338 | ||
2339 | /* Create new NSSA-LSA instance. */ | |
2340 | if ((new = ospf_external_lsa_new(ospf, ei, NULL)) == NULL) { | |
2341 | if (IS_DEBUG_OSPF_EVENT) | |
2342 | zlog_debug( | |
2343 | "LSA[Type7:%pI4]: Could not originate NSSA-LSA", | |
2344 | &ei->p.prefix); | |
2345 | return NULL; | |
2346 | } | |
2347 | new->data->type = OSPF_AS_NSSA_LSA; | |
2348 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
2349 | new->area = area; | |
2350 | ||
2351 | /* Install newly created LSA into Type-7 LSDB. */ | |
2352 | ospf_lsa_install(ospf, NULL, new); | |
2353 | ||
2354 | /* Flooding new LSA */ | |
2355 | ospf_flood_through_area(area, NULL, new); | |
2356 | ||
2357 | /* Debug logging. */ | |
2358 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
2359 | zlog_debug("LSA[Type%d:%pI4]: NSSA-LSA refresh", | |
2360 | new->data->type, &new->data->id); | |
2361 | ospf_lsa_header_dump(new->data); | |
2362 | } | |
2363 | ||
2364 | return new; | |
2365 | } | |
2366 | ||
d62a17ae | 2367 | static struct external_info *ospf_default_external_info(struct ospf *ospf) |
2368 | { | |
2369 | int type; | |
d62a17ae | 2370 | struct prefix_ipv4 p; |
1febb13d S |
2371 | struct external_info *default_ei; |
2372 | int ret = 0; | |
d62a17ae | 2373 | |
2374 | p.family = AF_INET; | |
2375 | p.prefix.s_addr = 0; | |
2376 | p.prefixlen = 0; | |
2377 | ||
ffa484b4 | 2378 | default_ei = ospf_external_info_lookup(ospf, DEFAULT_ROUTE, 0, &p); |
1febb13d S |
2379 | if (!default_ei) |
2380 | return NULL; | |
2381 | ||
d62a17ae | 2382 | /* First, lookup redistributed default route. */ |
2383 | for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) { | |
2384 | struct list *ext_list; | |
d62a17ae | 2385 | |
2386 | if (type == ZEBRA_ROUTE_OSPF) | |
2387 | continue; | |
2388 | ||
de1ac5fd | 2389 | ext_list = ospf->external[type]; |
d62a17ae | 2390 | if (!ext_list) |
2391 | continue; | |
2392 | ||
1febb13d S |
2393 | ret = ospf_external_default_routemap_apply_walk(ospf, ext_list, |
2394 | default_ei); | |
2395 | if (ret) | |
2396 | return default_ei; | |
d62a17ae | 2397 | } |
2398 | ||
2399 | return NULL; | |
2400 | } | |
2401 | ||
fa3c7c7e | 2402 | void ospf_external_lsa_rid_change(struct ospf *ospf) |
d62a17ae | 2403 | { |
d62a17ae | 2404 | struct external_info *ei; |
960417cf | 2405 | struct ospf_external_aggr_rt *aggr; |
a4d9009d | 2406 | struct ospf_lsa *lsa = NULL; |
2407 | int force; | |
fa3c7c7e | 2408 | int type; |
d62a17ae | 2409 | |
fa3c7c7e DL |
2410 | for (type = 0; type < ZEBRA_ROUTE_MAX; type++) { |
2411 | struct route_node *rn; | |
2412 | struct route_table *rt; | |
2413 | struct list *ext_list; | |
2414 | struct listnode *node; | |
2415 | struct ospf_external *ext; | |
d62a17ae | 2416 | |
fa3c7c7e DL |
2417 | ext_list = ospf->external[type]; |
2418 | if (!ext_list) | |
2419 | continue; | |
d62a17ae | 2420 | |
fa3c7c7e DL |
2421 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) { |
2422 | /* Originate As-external-LSA from all type of | |
2423 | * distribute source. | |
2424 | */ | |
2425 | rt = ext->external_info; | |
2426 | if (!rt) | |
2427 | continue; | |
d62a17ae | 2428 | |
fa3c7c7e DL |
2429 | for (rn = route_top(rt); rn; rn = route_next(rn)) { |
2430 | ei = rn->info; | |
d62a17ae | 2431 | |
fa3c7c7e DL |
2432 | if (!ei) |
2433 | continue; | |
2434 | ||
1fe59b44 | 2435 | if (is_default_prefix4(&ei->p)) |
fa3c7c7e DL |
2436 | continue; |
2437 | ||
a4d9009d | 2438 | lsa = ospf_external_info_find_lsa(ospf, &ei->p); |
960417cf | 2439 | |
2440 | aggr = ospf_external_aggr_match(ospf, &ei->p); | |
2441 | if (aggr) { | |
a4d9009d | 2442 | |
2443 | if (!ospf_redistribute_check(ospf, ei, | |
2444 | NULL)) | |
2445 | continue; | |
2446 | ||
960417cf | 2447 | if (IS_DEBUG_OSPF(lsa, EXTNL_LSA_AGGR)) |
2448 | zlog_debug( | |
2449 | "Originate Summary LSA after reset/router-ID change"); | |
a4d9009d | 2450 | |
960417cf | 2451 | /* Here the LSA is originated as new */ |
2452 | ospf_originate_summary_lsa(ospf, aggr, | |
2453 | ei); | |
a4d9009d | 2454 | } else if (lsa) { |
2455 | /* LSA needs to be refreshed even if | |
2456 | * there is no change in the route | |
2457 | * params if the LSA is in maxage. | |
2458 | */ | |
2459 | if (IS_LSA_MAXAGE(lsa)) | |
2460 | force = LSA_REFRESH_FORCE; | |
2461 | else | |
2462 | force = LSA_REFRESH_IF_CHANGED; | |
2463 | ||
2464 | ospf_external_lsa_refresh(ospf, lsa, | |
2465 | ei, force, 0); | |
2466 | } else { | |
2467 | if (!ospf_redistribute_check(ospf, ei, | |
2468 | NULL)) | |
2469 | continue; | |
2470 | ||
2471 | if (!ospf_external_lsa_originate(ospf, | |
c1624189 | 2472 | ei)) |
a4d9009d | 2473 | flog_warn( |
2474 | EC_OSPF_LSA_INSTALL_FAILURE, | |
2475 | "LSA: AS-external-LSA was not originated."); | |
2476 | } | |
fa3c7c7e DL |
2477 | } |
2478 | } | |
2479 | } | |
2480 | ||
2481 | ei = ospf_default_external_info(ospf); | |
2482 | if (ei && !ospf_external_lsa_originate(ospf, ei)) { | |
2483 | flog_warn(EC_OSPF_LSA_INSTALL_FAILURE, | |
2484 | "LSA: AS-external-LSA for default route was not originated."); | |
2485 | } | |
718e3744 | 2486 | } |
2487 | ||
645878f1 | 2488 | /* Flush any NSSA LSAs for given prefix */ |
d62a17ae | 2489 | void ospf_nssa_lsa_flush(struct ospf *ospf, struct prefix_ipv4 *p) |
2490 | { | |
2491 | struct listnode *node, *nnode; | |
b5a8894d | 2492 | struct ospf_lsa *lsa = NULL; |
d62a17ae | 2493 | struct ospf_area *area; |
2494 | ||
2495 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { | |
2496 | if (area->external_routing == OSPF_AREA_NSSA) { | |
996c9314 LB |
2497 | lsa = ospf_lsa_lookup(ospf, area, OSPF_AS_NSSA_LSA, |
2498 | p->prefix, ospf->router_id); | |
b5a8894d | 2499 | if (!lsa) { |
d62a17ae | 2500 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) |
2501 | zlog_debug( | |
ae32e1c2 DS |
2502 | "LSA: There is no such AS-NSSA-LSA %pFX in LSDB", |
2503 | p); | |
d62a17ae | 2504 | continue; |
2505 | } | |
2506 | ospf_ls_retransmit_delete_nbr_area(area, lsa); | |
2507 | if (!IS_LSA_MAXAGE(lsa)) { | |
2508 | ospf_refresher_unregister_lsa(ospf, lsa); | |
2509 | ospf_lsa_flush_area(lsa, area); | |
2510 | } | |
2511 | } | |
2512 | } | |
645878f1 | 2513 | } |
645878f1 | 2514 | |
718e3744 | 2515 | /* Flush an AS-external-LSA from LSDB and routing domain. */ |
d7c0a89a | 2516 | void ospf_external_lsa_flush(struct ospf *ospf, uint8_t type, |
d62a17ae | 2517 | struct prefix_ipv4 *p, |
2518 | ifindex_t ifindex /*, struct in_addr nexthop */) | |
2519 | { | |
2520 | struct ospf_lsa *lsa; | |
2521 | ||
2522 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
ae32e1c2 | 2523 | zlog_debug("LSA: Flushing AS-external-LSA %pFX", p); |
d62a17ae | 2524 | |
2525 | /* First lookup LSA from LSDB. */ | |
2526 | if (!(lsa = ospf_external_info_find_lsa(ospf, p))) { | |
2527 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
2528 | zlog_debug( | |
ae32e1c2 DS |
2529 | "LSA: There is no such AS-external-LSA %pFX in LSDB", |
2530 | p); | |
d62a17ae | 2531 | return; |
2532 | } | |
2533 | ||
2534 | /* If LSA is selforiginated, not a translated LSA, and there is | |
2535 | * NSSA area, flush Type-7 LSA's at first. | |
2536 | */ | |
2537 | if (IS_LSA_SELF(lsa) && (ospf->anyNSSA) | |
2538 | && !(CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT))) | |
2539 | ospf_nssa_lsa_flush(ospf, p); | |
2540 | ||
d62a17ae | 2541 | if (!IS_LSA_MAXAGE(lsa)) { |
ab31275c | 2542 | /* Sweep LSA from Link State Retransmit List. */ |
2543 | ospf_ls_retransmit_delete_nbr_as(ospf, lsa); | |
2544 | ||
d62a17ae | 2545 | /* Unregister LSA from Refresh queue. */ |
2546 | ospf_refresher_unregister_lsa(ospf, lsa); | |
2547 | ||
2548 | /* Flush AS-external-LSA through AS. */ | |
2549 | ospf_lsa_flush_as(ospf, lsa); | |
2550 | } | |
2551 | ||
2552 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
e6f3b262 | 2553 | zlog_debug("%s: stop", __func__); |
d62a17ae | 2554 | } |
2555 | ||
2556 | void ospf_external_lsa_refresh_default(struct ospf *ospf) | |
2557 | { | |
2558 | struct prefix_ipv4 p; | |
2559 | struct external_info *ei; | |
2560 | struct ospf_lsa *lsa; | |
2561 | ||
2562 | p.family = AF_INET; | |
2563 | p.prefixlen = 0; | |
975a328e | 2564 | p.prefix.s_addr = INADDR_ANY; |
d62a17ae | 2565 | |
2566 | ei = ospf_default_external_info(ospf); | |
2567 | lsa = ospf_external_info_find_lsa(ospf, &p); | |
2568 | ||
d5eac1e0 DL |
2569 | if (ei && lsa) { |
2570 | if (IS_DEBUG_OSPF_EVENT) | |
2571 | zlog_debug("LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p", | |
63f0e941 | 2572 | (void *)lsa); |
2573 | ospf_external_lsa_refresh(ospf, lsa, ei, LSA_REFRESH_FORCE, | |
2574 | false); | |
d5eac1e0 DL |
2575 | } else if (ei && !lsa) { |
2576 | if (IS_DEBUG_OSPF_EVENT) | |
2577 | zlog_debug( | |
2578 | "LSA[Type5:0.0.0.0]: Originate AS-external-LSA"); | |
2579 | ospf_external_lsa_originate(ospf, ei); | |
2580 | } else if (lsa) { | |
2581 | if (IS_DEBUG_OSPF_EVENT) | |
2582 | zlog_debug("LSA[Type5:0.0.0.0]: Flush AS-external-LSA"); | |
2583 | ospf_external_lsa_flush(ospf, DEFAULT_ROUTE, &p, 0); | |
d62a17ae | 2584 | } |
2585 | } | |
2586 | ||
d7c0a89a QY |
2587 | void ospf_external_lsa_refresh_type(struct ospf *ospf, uint8_t type, |
2588 | unsigned short instance, int force) | |
d62a17ae | 2589 | { |
2590 | struct route_node *rn; | |
2591 | struct external_info *ei; | |
2592 | struct ospf_external *ext; | |
2593 | ||
de1ac5fd CS |
2594 | if (type == DEFAULT_ROUTE) |
2595 | return; | |
2596 | ||
2597 | ext = ospf_external_lookup(ospf, type, instance); | |
2598 | ||
2599 | if (ext && EXTERNAL_INFO(ext)) { | |
2600 | /* Refresh each redistributed AS-external-LSAs. */ | |
2601 | for (rn = route_top(EXTERNAL_INFO(ext)); rn; | |
2602 | rn = route_next(rn)) { | |
2603 | ei = rn->info; | |
2604 | if (ei) { | |
1fe59b44 | 2605 | if (!is_default_prefix4(&ei->p)) { |
de1ac5fd | 2606 | struct ospf_lsa *lsa; |
960417cf | 2607 | struct ospf_external_aggr_rt *aggr; |
de1ac5fd | 2608 | |
960417cf | 2609 | aggr = ospf_external_aggr_match(ospf, |
2610 | &ei->p); | |
996c9314 | 2611 | lsa = ospf_external_info_find_lsa( |
960417cf | 2612 | ospf, &ei->p); |
2613 | if (aggr) { | |
2614 | /* Check the AS-external-LSA | |
2615 | * should be originated. | |
2616 | */ | |
2617 | if (!ospf_redistribute_check( | |
2618 | ospf, ei, NULL)) { | |
2619 | ||
2620 | ospf_unlink_ei_from_aggr( | |
2621 | ospf, aggr, ei); | |
2622 | continue; | |
2623 | } | |
2624 | ||
2625 | if (IS_DEBUG_OSPF( | |
2626 | lsa, | |
2627 | EXTNL_LSA_AGGR)) | |
2628 | zlog_debug( | |
f1db813d | 2629 | "%s: Send Aggreate LSA (%pFX)", |
960417cf | 2630 | __func__, |
f1db813d | 2631 | &aggr->p); |
960417cf | 2632 | |
2633 | ospf_originate_summary_lsa( | |
2634 | ospf, aggr, ei); | |
2635 | ||
2636 | } else if (lsa) { | |
2637 | ||
2638 | if (IS_LSA_MAXAGE(lsa)) | |
2639 | force = LSA_REFRESH_FORCE; | |
2640 | ||
996c9314 | 2641 | ospf_external_lsa_refresh( |
63f0e941 | 2642 | ospf, lsa, ei, force, |
2643 | false); | |
960417cf | 2644 | } else { |
2645 | if (!ospf_redistribute_check( | |
2646 | ospf, ei, NULL)) | |
2647 | continue; | |
996c9314 LB |
2648 | ospf_external_lsa_originate( |
2649 | ospf, ei); | |
960417cf | 2650 | } |
de1ac5fd CS |
2651 | } |
2652 | } | |
2653 | } | |
2654 | } | |
718e3744 | 2655 | } |
2656 | ||
2657 | /* Refresh AS-external-LSA. */ | |
d62a17ae | 2658 | struct ospf_lsa *ospf_external_lsa_refresh(struct ospf *ospf, |
2659 | struct ospf_lsa *lsa, | |
63f0e941 | 2660 | struct external_info *ei, int force, |
2661 | bool is_aggr) | |
d62a17ae | 2662 | { |
2663 | struct ospf_lsa *new; | |
63f0e941 | 2664 | int changed = 0; |
d62a17ae | 2665 | |
2666 | /* Check the AS-external-LSA should be originated. */ | |
63f0e941 | 2667 | if (!is_aggr) |
2668 | if (!ospf_redistribute_check(ospf, ei, &changed)) { | |
2669 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
2670 | zlog_debug( | |
ce513ac6 | 2671 | "LSA[Type%d:%pI4] Could not be refreshed, redist check fail", |
63f0e941 | 2672 | lsa->data->type, |
ce513ac6 | 2673 | &lsa->data->id); |
63f0e941 | 2674 | |
2675 | ospf_external_lsa_flush(ospf, ei->type, &ei->p, | |
2676 | ei->ifindex /*, ei->nexthop */); | |
2677 | return NULL; | |
2678 | } | |
d62a17ae | 2679 | |
2680 | if (!changed && !force) { | |
2681 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
2682 | zlog_debug( | |
96b663a3 MS |
2683 | "LSA[Type%d:%pI4]: Not refreshed, not changed/forced", |
2684 | lsa->data->type, &lsa->data->id); | |
d62a17ae | 2685 | return NULL; |
2686 | } | |
2687 | ||
2688 | /* Delete LSA from neighbor retransmit-list. */ | |
2689 | ospf_ls_retransmit_delete_nbr_as(ospf, lsa); | |
2690 | ||
2691 | /* Unregister AS-external-LSA from refresh-list. */ | |
2692 | ospf_refresher_unregister_lsa(ospf, lsa); | |
2693 | ||
2694 | new = ospf_external_lsa_new(ospf, ei, &lsa->data->id); | |
2695 | ||
2696 | if (new == NULL) { | |
2697 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
96b663a3 MS |
2698 | zlog_debug("LSA[Type%d:%pI4]: Could not be refreshed", |
2699 | lsa->data->type, &lsa->data->id); | |
d62a17ae | 2700 | return NULL; |
2701 | } | |
2702 | ||
2703 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
2704 | ||
2705 | ospf_lsa_install(ospf, NULL, new); /* As type-5. */ | |
2706 | ||
2707 | /* Flood LSA through AS. */ | |
2708 | ospf_flood_through_as(ospf, NULL, new); | |
2709 | ||
2710 | /* If any attached NSSA, install as Type-7, flood to all NSSA Areas */ | |
2711 | if (ospf->anyNSSA && !(CHECK_FLAG(new->flags, OSPF_LSA_LOCAL_XLT))) | |
017714e3 RW |
2712 | ospf_install_flood_nssa(ospf, |
2713 | new); /* Install/Flood per new rules */ | |
d62a17ae | 2714 | |
2715 | /* Register self-originated LSA to refresh queue. | |
2716 | * Translated LSAs should not be registered, but refreshed upon | |
2717 | * refresh of the Type-7 | |
2718 | */ | |
2719 | if (!CHECK_FLAG(new->flags, OSPF_LSA_LOCAL_XLT)) | |
2720 | ospf_refresher_register_lsa(ospf, new); | |
2721 | ||
2722 | /* Debug logging. */ | |
2723 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
96b663a3 MS |
2724 | zlog_debug("LSA[Type%d:%pI4]: AS-external-LSA refresh", |
2725 | new->data->type, &new->data->id); | |
d62a17ae | 2726 | ospf_lsa_header_dump(new->data); |
2727 | } | |
2728 | ||
2729 | return new; | |
718e3744 | 2730 | } |
2731 | ||
6b0655a2 | 2732 | |
718e3744 | 2733 | /* LSA installation functions. */ |
2734 | ||
2735 | /* Install router-LSA to an area. */ | |
4dadc291 | 2736 | static struct ospf_lsa * |
d62a17ae | 2737 | ospf_router_lsa_install(struct ospf *ospf, struct ospf_lsa *new, int rt_recalc) |
718e3744 | 2738 | { |
d62a17ae | 2739 | struct ospf_area *area = new->area; |
718e3744 | 2740 | |
d62a17ae | 2741 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs |
2742 | The entire routing table must be recalculated, starting with | |
2743 | the shortest path calculations for each area (not just the | |
2744 | area whose link-state database has changed). | |
2745 | */ | |
718e3744 | 2746 | |
d62a17ae | 2747 | if (IS_LSA_SELF(new)) { |
5996e0df | 2748 | |
d62a17ae | 2749 | /* Only install LSA if it is originated/refreshed by us. |
2750 | * If LSA was received by flooding, the RECEIVED flag is set so | |
2751 | * do | |
2752 | * not link the LSA */ | |
2753 | if (CHECK_FLAG(new->flags, OSPF_LSA_RECEIVED)) | |
2754 | return new; /* ignore stale LSA */ | |
5996e0df | 2755 | |
d62a17ae | 2756 | /* Set self-originated router-LSA. */ |
2757 | ospf_lsa_unlock(&area->router_lsa_self); | |
2758 | area->router_lsa_self = ospf_lsa_lock(new); | |
718e3744 | 2759 | |
d62a17ae | 2760 | ospf_refresher_register_lsa(ospf, new); |
2761 | } | |
2762 | if (rt_recalc) | |
2763 | ospf_spf_calculate_schedule(ospf, SPF_FLAG_ROUTER_LSA_INSTALL); | |
2764 | return new; | |
718e3744 | 2765 | } |
2766 | ||
718e3744 | 2767 | /* Install network-LSA to an area. */ |
d62a17ae | 2768 | static struct ospf_lsa *ospf_network_lsa_install(struct ospf *ospf, |
2769 | struct ospf_interface *oi, | |
2770 | struct ospf_lsa *new, | |
2771 | int rt_recalc) | |
2772 | { | |
3228977f | 2773 | |
d62a17ae | 2774 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs |
2775 | The entire routing table must be recalculated, starting with | |
2776 | the shortest path calculations for each area (not just the | |
2777 | area whose link-state database has changed). | |
2778 | */ | |
2779 | if (IS_LSA_SELF(new)) { | |
2780 | /* We supposed that when LSA is originated by us, we pass the | |
2781 | int | |
2782 | for which it was originated. If LSA was received by flooding, | |
2783 | the RECEIVED flag is set, so we do not link the LSA to the | |
2784 | int. */ | |
2785 | if (CHECK_FLAG(new->flags, OSPF_LSA_RECEIVED)) | |
2786 | return new; /* ignore stale LSA */ | |
2787 | ||
2788 | ospf_lsa_unlock(&oi->network_lsa_self); | |
2789 | oi->network_lsa_self = ospf_lsa_lock(new); | |
2790 | ospf_refresher_register_lsa(ospf, new); | |
2791 | } | |
2792 | if (rt_recalc) | |
2793 | ospf_spf_calculate_schedule(ospf, SPF_FLAG_NETWORK_LSA_INSTALL); | |
2794 | ||
2795 | return new; | |
718e3744 | 2796 | } |
2797 | ||
2798 | /* Install summary-LSA to an area. */ | |
4dadc291 | 2799 | static struct ospf_lsa * |
d62a17ae | 2800 | ospf_summary_lsa_install(struct ospf *ospf, struct ospf_lsa *new, int rt_recalc) |
2801 | { | |
2802 | if (rt_recalc && !IS_LSA_SELF(new)) { | |
2803 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2804 | The best route to the destination described by the summary- | |
2805 | LSA must be recalculated (see Section 16.5). If this | |
2806 | destination is an AS boundary router, it may also be | |
2807 | necessary to re-examine all the AS-external-LSAs. | |
2808 | */ | |
718e3744 | 2809 | |
d62a17ae | 2810 | ospf_spf_calculate_schedule(ospf, SPF_FLAG_SUMMARY_LSA_INSTALL); |
d62a17ae | 2811 | } |
718e3744 | 2812 | |
d62a17ae | 2813 | if (IS_LSA_SELF(new)) |
2814 | ospf_refresher_register_lsa(ospf, new); | |
718e3744 | 2815 | |
d62a17ae | 2816 | return new; |
718e3744 | 2817 | } |
2818 | ||
2819 | /* Install ASBR-summary-LSA to an area. */ | |
d62a17ae | 2820 | static struct ospf_lsa *ospf_summary_asbr_lsa_install(struct ospf *ospf, |
2821 | struct ospf_lsa *new, | |
2822 | int rt_recalc) | |
2823 | { | |
2824 | if (rt_recalc && !IS_LSA_SELF(new)) { | |
2825 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2826 | The best route to the destination described by the summary- | |
2827 | LSA must be recalculated (see Section 16.5). If this | |
2828 | destination is an AS boundary router, it may also be | |
2829 | necessary to re-examine all the AS-external-LSAs. | |
2830 | */ | |
d62a17ae | 2831 | ospf_spf_calculate_schedule(ospf, |
2832 | SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL); | |
d62a17ae | 2833 | } |
718e3744 | 2834 | |
d62a17ae | 2835 | /* register LSA to refresh-list. */ |
2836 | if (IS_LSA_SELF(new)) | |
2837 | ospf_refresher_register_lsa(ospf, new); | |
718e3744 | 2838 | |
d62a17ae | 2839 | return new; |
718e3744 | 2840 | } |
2841 | ||
2842 | /* Install AS-external-LSA. */ | |
d62a17ae | 2843 | static struct ospf_lsa *ospf_external_lsa_install(struct ospf *ospf, |
2844 | struct ospf_lsa *new, | |
2845 | int rt_recalc) | |
2846 | { | |
2847 | ospf_ase_register_external_lsa(new, ospf); | |
2848 | /* If LSA is not self-originated, calculate an external route. */ | |
2849 | if (rt_recalc) { | |
2850 | /* RFC 2328 Section 13.2 AS-external-LSAs | |
2851 | The best route to the destination described by the AS- | |
2852 | external-LSA must be recalculated (see Section 16.6). | |
2853 | */ | |
2854 | ||
2855 | if (!IS_LSA_SELF(new)) | |
2856 | ospf_ase_incremental_update(ospf, new); | |
2857 | } | |
2858 | ||
2859 | if (new->data->type == OSPF_AS_NSSA_LSA) { | |
2860 | /* There is no point to register selforiginate Type-7 LSA for | |
2861 | * refreshing. We rely on refreshing Type-5 LSA's | |
2862 | */ | |
2863 | if (IS_LSA_SELF(new)) | |
2864 | return new; | |
2865 | else { | |
2866 | /* Try refresh type-5 translated LSA for this LSA, if | |
2867 | * one exists. | |
2868 | * New translations will be taken care of by the | |
2869 | * abr_task. | |
2870 | */ | |
2871 | ospf_translated_nssa_refresh(ospf, new, NULL); | |
493472ba | 2872 | ospf_schedule_abr_task(ospf); |
d62a17ae | 2873 | } |
2874 | } | |
2875 | ||
2876 | /* Register self-originated LSA to refresh queue. | |
2877 | * Leave Translated LSAs alone if NSSA is enabled | |
2878 | */ | |
2879 | if (IS_LSA_SELF(new) && !CHECK_FLAG(new->flags, OSPF_LSA_LOCAL_XLT)) | |
2880 | ospf_refresher_register_lsa(ospf, new); | |
2881 | ||
2882 | return new; | |
2883 | } | |
2884 | ||
2885 | void ospf_discard_from_db(struct ospf *ospf, struct ospf_lsdb *lsdb, | |
2886 | struct ospf_lsa *lsa) | |
2887 | { | |
2888 | struct ospf_lsa *old; | |
2889 | ||
266469eb | 2890 | if (!lsdb) |
d62a17ae | 2891 | return; |
d62a17ae | 2892 | |
2893 | old = ospf_lsdb_lookup(lsdb, lsa); | |
2894 | ||
2895 | if (!old) | |
2896 | return; | |
2897 | ||
2898 | if (old->refresh_list >= 0) | |
2899 | ospf_refresher_unregister_lsa(ospf, old); | |
2900 | ||
2901 | switch (old->data->type) { | |
2902 | case OSPF_AS_EXTERNAL_LSA: | |
2903 | ospf_ase_unregister_external_lsa(old, ospf); | |
2904 | ospf_ls_retransmit_delete_nbr_as(ospf, old); | |
2905 | break; | |
2906 | case OSPF_OPAQUE_AS_LSA: | |
2907 | ospf_ls_retransmit_delete_nbr_as(ospf, old); | |
2908 | break; | |
2909 | case OSPF_AS_NSSA_LSA: | |
2910 | ospf_ls_retransmit_delete_nbr_area(old->area, old); | |
2911 | ospf_ase_unregister_external_lsa(old, ospf); | |
2912 | break; | |
2913 | default: | |
2914 | ospf_ls_retransmit_delete_nbr_area(old->area, old); | |
2915 | break; | |
2916 | } | |
2917 | ||
2918 | ospf_lsa_maxage_delete(ospf, old); | |
2919 | ospf_lsa_discard(old); | |
2920 | } | |
2921 | ||
2922 | struct ospf_lsa *ospf_lsa_install(struct ospf *ospf, struct ospf_interface *oi, | |
2923 | struct ospf_lsa *lsa) | |
2924 | { | |
2925 | struct ospf_lsa *new = NULL; | |
2926 | struct ospf_lsa *old = NULL; | |
2927 | struct ospf_lsdb *lsdb = NULL; | |
2928 | int rt_recalc; | |
2929 | ||
2930 | /* Set LSDB. */ | |
2931 | switch (lsa->data->type) { | |
2932 | /* kevinm */ | |
2933 | case OSPF_AS_NSSA_LSA: | |
2934 | if (lsa->area) | |
2935 | lsdb = lsa->area->lsdb; | |
2936 | else | |
2937 | lsdb = ospf->lsdb; | |
2938 | break; | |
2939 | case OSPF_AS_EXTERNAL_LSA: | |
2940 | case OSPF_OPAQUE_AS_LSA: | |
2941 | lsdb = ospf->lsdb; | |
2942 | break; | |
2943 | default: | |
a37befa7 | 2944 | if (lsa->area) |
2945 | lsdb = lsa->area->lsdb; | |
d62a17ae | 2946 | break; |
2947 | } | |
2948 | ||
2949 | assert(lsdb); | |
2950 | ||
2951 | /* RFC 2328 13.2. Installing LSAs in the database | |
2952 | ||
2953 | Installing a new LSA in the database, either as the result of | |
2954 | flooding or a newly self-originated LSA, may cause the OSPF | |
2955 | routing table structure to be recalculated. The contents of the | |
2956 | new LSA should be compared to the old instance, if present. If | |
2957 | there is no difference, there is no need to recalculate the | |
2958 | routing table. When comparing an LSA to its previous instance, | |
2959 | the following are all considered to be differences in contents: | |
2960 | ||
2961 | o The LSA's Options field has changed. | |
2962 | ||
2963 | o One of the LSA instances has LS age set to MaxAge, and | |
2964 | the other does not. | |
2965 | ||
2966 | o The length field in the LSA header has changed. | |
2967 | ||
2968 | o The body of the LSA (i.e., anything outside the 20-byte | |
2969 | LSA header) has changed. Note that this excludes changes | |
2970 | in LS Sequence Number and LS Checksum. | |
2971 | ||
2972 | */ | |
2973 | /* Look up old LSA and determine if any SPF calculation or incremental | |
2974 | update is needed */ | |
2975 | old = ospf_lsdb_lookup(lsdb, lsa); | |
2976 | ||
ce5002c6 | 2977 | /* Do comparison and record if recalc needed. */ |
d62a17ae | 2978 | rt_recalc = 0; |
1bb2674c | 2979 | if (old == NULL || ospf_lsa_different(old, lsa, false)) { |
df074ec3 | 2980 | /* Ref rfc3623 section 3.2.3 |
2981 | * Installing new lsa or change in the existing LSA | |
2982 | * or flushing existing LSA leads to topo change | |
2983 | * and trigger SPF caculation. | |
2984 | * So, router should be aborted from HELPER role | |
2985 | * if it is detected as TOPO change. | |
2986 | */ | |
ef151af7 | 2987 | if (ospf->active_restarter_cnt && |
2988 | CHECK_LSA_TYPE_1_TO_5_OR_7(lsa->data->type)) { | |
2989 | if (old == NULL || ospf_lsa_different(old, lsa, true)) | |
2990 | ospf_helper_handle_topo_chg(ospf, lsa); | |
2991 | } | |
df074ec3 | 2992 | |
d62a17ae | 2993 | rt_recalc = 1; |
df074ec3 | 2994 | } |
d62a17ae | 2995 | |
2996 | /* | |
2997 | Sequence number check (Section 14.1 of rfc 2328) | |
2998 | "Premature aging is used when it is time for a self-originated | |
2999 | LSA's sequence number field to wrap. At this point, the current | |
3000 | LSA instance (having LS sequence number MaxSequenceNumber) must | |
3001 | be prematurely aged and flushed from the routing domain before a | |
3002 | new instance with sequence number equal to InitialSequenceNumber | |
3003 | can be originated. " | |
3004 | */ | |
3005 | ||
3006 | if (ntohl(lsa->data->ls_seqnum) - 1 == OSPF_MAX_SEQUENCE_NUMBER) { | |
3007 | if (ospf_lsa_is_self_originated(ospf, lsa)) { | |
3008 | lsa->data->ls_seqnum = htonl(OSPF_MAX_SEQUENCE_NUMBER); | |
3009 | ||
3010 | if (!IS_LSA_MAXAGE(lsa)) | |
3011 | lsa->flags |= OSPF_LSA_PREMATURE_AGE; | |
3012 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
3013 | ||
3014 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) { | |
3015 | zlog_debug( | |
461d106d RW |
3016 | "%s() Premature Aging lsa %p, seqnum 0x%x", |
3017 | __func__, lsa, | |
d62a17ae | 3018 | ntohl(lsa->data->ls_seqnum)); |
3019 | ospf_lsa_header_dump(lsa->data); | |
3020 | } | |
3021 | } else { | |
3022 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
3023 | zlog_debug( | |
461d106d RW |
3024 | "%s() got an lsa with seq 0x80000000 that was not self originated. Ignoring", |
3025 | __func__); | |
d62a17ae | 3026 | ospf_lsa_header_dump(lsa->data); |
3027 | } | |
3028 | return old; | |
3029 | } | |
3030 | } | |
3031 | ||
3032 | /* discard old LSA from LSDB */ | |
3033 | if (old != NULL) | |
3034 | ospf_discard_from_db(ospf, lsdb, lsa); | |
3035 | ||
3036 | /* Calculate Checksum if self-originated?. */ | |
3037 | if (IS_LSA_SELF(lsa)) | |
3038 | ospf_lsa_checksum(lsa->data); | |
3039 | ||
3040 | /* Insert LSA to LSDB. */ | |
3041 | ospf_lsdb_add(lsdb, lsa); | |
3042 | lsa->lsdb = lsdb; | |
3043 | ||
3044 | /* Do LSA specific installation process. */ | |
3045 | switch (lsa->data->type) { | |
3046 | case OSPF_ROUTER_LSA: | |
3047 | new = ospf_router_lsa_install(ospf, lsa, rt_recalc); | |
3048 | break; | |
3049 | case OSPF_NETWORK_LSA: | |
3050 | assert(oi); | |
3051 | new = ospf_network_lsa_install(ospf, oi, lsa, rt_recalc); | |
3052 | break; | |
3053 | case OSPF_SUMMARY_LSA: | |
3054 | new = ospf_summary_lsa_install(ospf, lsa, rt_recalc); | |
3055 | break; | |
3056 | case OSPF_ASBR_SUMMARY_LSA: | |
3057 | new = ospf_summary_asbr_lsa_install(ospf, lsa, rt_recalc); | |
3058 | break; | |
3059 | case OSPF_AS_EXTERNAL_LSA: | |
3060 | new = ospf_external_lsa_install(ospf, lsa, rt_recalc); | |
3061 | break; | |
3062 | case OSPF_OPAQUE_LINK_LSA: | |
3063 | if (IS_LSA_SELF(lsa)) | |
3064 | lsa->oi = oi; /* Specify outgoing ospf-interface for | |
3065 | this LSA. */ | |
3066 | else { | |
3067 | /* Incoming "oi" for this LSA has set at LSUpd | |
3068 | * reception. */ | |
3069 | } | |
3070 | /* Fallthrough */ | |
3071 | case OSPF_OPAQUE_AREA_LSA: | |
3072 | case OSPF_OPAQUE_AS_LSA: | |
3073 | new = ospf_opaque_lsa_install(lsa, rt_recalc); | |
3074 | break; | |
3075 | case OSPF_AS_NSSA_LSA: | |
3076 | new = ospf_external_lsa_install(ospf, lsa, rt_recalc); | |
3077 | default: /* type-6,8,9....nothing special */ | |
3078 | break; | |
3079 | } | |
3080 | ||
3081 | if (new == NULL) | |
3082 | return new; /* Installation failed, cannot proceed further -- | |
3083 | endo. */ | |
3084 | ||
3085 | /* Debug logs. */ | |
3086 | if (IS_DEBUG_OSPF(lsa, LSA_INSTALL)) { | |
d62a17ae | 3087 | switch (lsa->data->type) { |
3088 | case OSPF_AS_EXTERNAL_LSA: | |
3089 | case OSPF_OPAQUE_AS_LSA: | |
3090 | case OSPF_AS_NSSA_LSA: | |
3091 | zlog_debug("LSA[%s]: Install %s", dump_lsa_key(new), | |
3092 | lookup_msg(ospf_lsa_type_msg, | |
3093 | new->data->type, NULL)); | |
3094 | break; | |
3095 | default: | |
96b663a3 | 3096 | zlog_debug("LSA[%s]: Install %s to Area %pI4", |
d62a17ae | 3097 | dump_lsa_key(new), |
3098 | lookup_msg(ospf_lsa_type_msg, | |
3099 | new->data->type, NULL), | |
96b663a3 | 3100 | &new->area->area_id); |
d62a17ae | 3101 | break; |
3102 | } | |
3103 | } | |
3104 | ||
3105 | /* | |
3106 | If received LSA' ls_age is MaxAge, or lsa is being prematurely aged | |
3107 | (it's getting flushed out of the area), set LSA on MaxAge LSA list. | |
3108 | */ | |
3109 | if (IS_LSA_MAXAGE(new)) { | |
3110 | if (IS_DEBUG_OSPF(lsa, LSA_INSTALL)) | |
e9505bc6 RW |
3111 | zlog_debug("LSA[%s]: Install LSA %p, MaxAge", |
3112 | dump_lsa_key(new), lsa); | |
d62a17ae | 3113 | ospf_lsa_maxage(ospf, lsa); |
3114 | } | |
3115 | ||
3116 | return new; | |
3117 | } | |
3118 | ||
3119 | ||
3120 | int ospf_check_nbr_status(struct ospf *ospf) | |
3121 | { | |
3122 | struct listnode *node, *nnode; | |
3123 | struct ospf_interface *oi; | |
3124 | ||
3125 | for (ALL_LIST_ELEMENTS(ospf->oiflist, node, nnode, oi)) { | |
3126 | struct route_node *rn; | |
3127 | struct ospf_neighbor *nbr; | |
3128 | ||
3129 | if (ospf_if_is_enable(oi)) | |
3130 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) | |
3131 | if ((nbr = rn->info) != NULL) | |
3132 | if (nbr->state == NSM_Exchange | |
3133 | || nbr->state == NSM_Loading) { | |
3134 | route_unlock_node(rn); | |
3135 | return 0; | |
3136 | } | |
3137 | } | |
3138 | ||
3139 | return 1; | |
3140 | } | |
3141 | ||
3142 | ||
e6685141 | 3143 | void ospf_maxage_lsa_remover(struct event *thread) |
d62a17ae | 3144 | { |
e16d030c | 3145 | struct ospf *ospf = EVENT_ARG(thread); |
f91ce319 | 3146 | struct ospf_lsa *lsa, *old; |
d62a17ae | 3147 | struct route_node *rn; |
3148 | int reschedule = 0; | |
3149 | ||
3150 | ospf->t_maxage = NULL; | |
3151 | ||
3152 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
3153 | zlog_debug("LSA[MaxAge]: remover Start"); | |
3154 | ||
3155 | reschedule = !ospf_check_nbr_status(ospf); | |
3156 | ||
3157 | if (!reschedule) | |
3158 | for (rn = route_top(ospf->maxage_lsa); rn; | |
3159 | rn = route_next(rn)) { | |
3160 | if ((lsa = rn->info) == NULL) { | |
3161 | continue; | |
3162 | } | |
3163 | ||
3164 | /* There is at least one neighbor from which we still | |
3165 | * await an ack | |
3166 | * for that LSA, so we are not allowed to remove it from | |
3167 | * our lsdb yet | |
3168 | * as per RFC 2328 section 14 para 4 a) */ | |
3169 | if (lsa->retransmit_counter > 0) { | |
3170 | reschedule = 1; | |
3171 | continue; | |
3172 | } | |
3173 | ||
3174 | /* TODO: maybe convert this function to a work-queue */ | |
70c35c11 | 3175 | if (event_should_yield(thread)) { |
d62a17ae | 3176 | OSPF_TIMER_ON(ospf->t_maxage, |
3177 | ospf_maxage_lsa_remover, 0); | |
3178 | route_unlock_node( | |
3179 | rn); /* route_top/route_next */ | |
cc9f21da | 3180 | return; |
d62a17ae | 3181 | } |
3182 | ||
3183 | /* Remove LSA from the LSDB */ | |
3184 | if (IS_LSA_SELF(lsa)) | |
3185 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
3186 | zlog_debug( | |
96b663a3 | 3187 | "LSA[Type%d:%pI4]: LSA 0x%lx is self-originated: ", |
d62a17ae | 3188 | lsa->data->type, |
96b663a3 | 3189 | &lsa->data->id, |
d7c0a89a | 3190 | (unsigned long)lsa); |
d62a17ae | 3191 | |
3192 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
3193 | zlog_debug( | |
e9505bc6 RW |
3194 | "LSA[%s]: MaxAge LSA removed from list", |
3195 | dump_lsa_key(lsa)); | |
d62a17ae | 3196 | |
3197 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_PREMATURE_AGE)) { | |
3198 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
3199 | zlog_debug( | |
461d106d RW |
3200 | "originating new lsa for lsa %p", |
3201 | lsa); | |
d62a17ae | 3202 | ospf_lsa_refresh(ospf, lsa); |
3203 | } | |
3204 | ||
3205 | /* Remove from lsdb. */ | |
3206 | if (lsa->lsdb) { | |
f91ce319 MR |
3207 | old = ospf_lsdb_lookup(lsa->lsdb, lsa); |
3208 | /* The max age LSA here must be the same | |
3209 | * as the LSA in LSDB | |
3210 | */ | |
3211 | if (old != lsa) { | |
3212 | flog_err(EC_OSPF_LSA_MISSING, | |
e9505bc6 RW |
3213 | "%s: LSA[%s]: LSA not in LSDB", |
3214 | __func__, dump_lsa_key(lsa)); | |
acc847c9 | 3215 | |
f91ce319 MR |
3216 | continue; |
3217 | } | |
d62a17ae | 3218 | ospf_discard_from_db(ospf, lsa->lsdb, lsa); |
3219 | ospf_lsdb_delete(lsa->lsdb, lsa); | |
13ab4921 DS |
3220 | } else { |
3221 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
3222 | zlog_debug( | |
e9505bc6 RW |
3223 | "%s: LSA[%s]: No associated LSDB!", |
3224 | __func__, dump_lsa_key(lsa)); | |
13ab4921 | 3225 | } |
d62a17ae | 3226 | } |
3227 | ||
3228 | /* A MaxAge LSA must be removed immediately from the router's link | |
3229 | state database as soon as both a) it is no longer contained on any | |
3230 | neighbor Link state retransmission lists and b) none of the | |
3231 | router's | |
3232 | neighbors are in states Exchange or Loading. */ | |
3233 | if (reschedule) | |
3234 | OSPF_TIMER_ON(ospf->t_maxage, ospf_maxage_lsa_remover, | |
3235 | ospf->maxage_delay); | |
d62a17ae | 3236 | } |
3237 | ||
3cb62bb3 MR |
3238 | /* This function checks whether an LSA with initial sequence number should be |
3239 | * originated after a wrap in sequence number | |
3240 | */ | |
3241 | void ospf_check_and_gen_init_seq_lsa(struct ospf_interface *oi, | |
3242 | struct ospf_lsa *recv_lsa) | |
3243 | { | |
3244 | struct ospf_lsa *lsa = NULL; | |
3245 | struct ospf *ospf = oi->ospf; | |
3246 | ||
3247 | lsa = ospf_lsa_lookup_by_header(oi->area, recv_lsa->data); | |
3248 | ||
3249 | if ((lsa == NULL) || (!CHECK_FLAG(lsa->flags, OSPF_LSA_PREMATURE_AGE)) | |
3250 | || (lsa->retransmit_counter != 0)) { | |
3251 | if (IS_DEBUG_OSPF(lsa, LSA)) | |
3252 | zlog_debug( | |
3253 | "Do not generate LSA with initial seqence number."); | |
3254 | return; | |
3255 | } | |
3256 | ||
3257 | ospf_lsa_maxage_delete(ospf, lsa); | |
3258 | ||
3259 | lsa->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
3260 | ||
3261 | ospf_lsa_refresh(ospf, lsa); | |
3262 | } | |
3263 | ||
d62a17ae | 3264 | void ospf_lsa_maxage_delete(struct ospf *ospf, struct ospf_lsa *lsa) |
3265 | { | |
3266 | struct route_node *rn; | |
dcc3ef87 | 3267 | struct prefix lsa_prefix; |
d62a17ae | 3268 | |
6006b807 | 3269 | memset(&lsa_prefix, 0, sizeof(lsa_prefix)); |
abb1bf8d | 3270 | lsa_prefix.family = AF_UNSPEC; |
dcc3ef87 CS |
3271 | lsa_prefix.prefixlen = sizeof(lsa_prefix.u.ptr) * CHAR_BIT; |
3272 | lsa_prefix.u.ptr = (uintptr_t)lsa; | |
d62a17ae | 3273 | |
c4efd0f4 | 3274 | if ((rn = route_node_lookup(ospf->maxage_lsa, &lsa_prefix))) { |
d62a17ae | 3275 | if (rn->info == lsa) { |
3276 | UNSET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); | |
3277 | ospf_lsa_unlock(&lsa); /* maxage_lsa */ | |
3278 | rn->info = NULL; | |
3279 | route_unlock_node( | |
3280 | rn); /* unlock node because lsa is deleted */ | |
3281 | } | |
3282 | route_unlock_node(rn); /* route_node_lookup */ | |
dcc3ef87 CS |
3283 | } else { |
3284 | if (IS_DEBUG_OSPF_EVENT) | |
3285 | zlog_debug("%s: lsa %s is not found in maxage db.", | |
15569c58 | 3286 | __func__, dump_lsa_key(lsa)); |
d62a17ae | 3287 | } |
718e3744 | 3288 | } |
3289 | ||
02d942c9 PJ |
3290 | /* Add LSA onto the MaxAge list, and schedule for removal. |
3291 | * This does *not* lead to the LSA being flooded, that must be taken | |
3292 | * care of elsewhere, see, e.g., ospf_lsa_flush* (which are callers of this | |
3293 | * function). | |
3294 | */ | |
d62a17ae | 3295 | void ospf_lsa_maxage(struct ospf *ospf, struct ospf_lsa *lsa) |
3296 | { | |
dcc3ef87 | 3297 | struct prefix lsa_prefix; |
d62a17ae | 3298 | struct route_node *rn; |
3299 | ||
3300 | /* When we saw a MaxAge LSA flooded to us, we put it on the list | |
3301 | and schedule the MaxAge LSA remover. */ | |
3302 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE)) { | |
3303 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
3304 | zlog_debug( | |
e9505bc6 RW |
3305 | "LSA[%s]: %p already exists on MaxAge LSA list", |
3306 | dump_lsa_key(lsa), lsa); | |
d62a17ae | 3307 | return; |
3308 | } | |
3309 | ||
6006b807 | 3310 | memset(&lsa_prefix, 0, sizeof(lsa_prefix)); |
abb1bf8d | 3311 | lsa_prefix.family = AF_UNSPEC; |
dcc3ef87 CS |
3312 | lsa_prefix.prefixlen = sizeof(lsa_prefix.u.ptr) * CHAR_BIT; |
3313 | lsa_prefix.u.ptr = (uintptr_t)lsa; | |
d62a17ae | 3314 | |
c4efd0f4 | 3315 | rn = route_node_get(ospf->maxage_lsa, &lsa_prefix); |
0ce1ca80 DS |
3316 | if (rn->info != NULL) { |
3317 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
3318 | zlog_debug( | |
3319 | "LSA[%s]: found LSA (%p) in table for LSA %p %d", | |
3320 | dump_lsa_key(lsa), rn->info, | |
3321 | (void *)lsa, lsa_prefix.prefixlen); | |
3322 | route_unlock_node(rn); | |
d62a17ae | 3323 | } else { |
0ce1ca80 DS |
3324 | rn->info = ospf_lsa_lock(lsa); |
3325 | SET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); | |
d62a17ae | 3326 | } |
3327 | ||
3328 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
3329 | zlog_debug("LSA[%s]: MaxAge LSA remover scheduled.", | |
3330 | dump_lsa_key(lsa)); | |
3331 | ||
3332 | OSPF_TIMER_ON(ospf->t_maxage, ospf_maxage_lsa_remover, | |
3333 | ospf->maxage_delay); | |
3334 | } | |
3335 | ||
3336 | static int ospf_lsa_maxage_walker_remover(struct ospf *ospf, | |
3337 | struct ospf_lsa *lsa) | |
3338 | { | |
3339 | /* Stay away from any Local Translated Type-7 LSAs */ | |
3340 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
3341 | return 0; | |
3342 | ||
3343 | if (IS_LSA_MAXAGE(lsa)) | |
3344 | /* Self-originated LSAs should NOT time-out instead, | |
3345 | they're flushed and submitted to the max_age list explicitly. | |
3346 | */ | |
3347 | if (!ospf_lsa_is_self_originated(ospf, lsa)) { | |
3348 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
3349 | zlog_debug("LSA[%s]: is MaxAge", | |
3350 | dump_lsa_key(lsa)); | |
3351 | ||
3352 | switch (lsa->data->type) { | |
3353 | case OSPF_OPAQUE_LINK_LSA: | |
3354 | case OSPF_OPAQUE_AREA_LSA: | |
3355 | case OSPF_OPAQUE_AS_LSA: | |
3356 | /* | |
3357 | * As a general rule, whenever network topology | |
3358 | * has changed | |
3359 | * (due to an LSA removal in this case), routing | |
3360 | * recalculation | |
3361 | * should be triggered. However, this is not | |
3362 | * true for opaque | |
3363 | * LSAs. Even if an opaque LSA instance is going | |
3364 | * to be removed | |
3365 | * from the routing domain, it does not mean a | |
3366 | * change in network | |
3367 | * topology, and thus, routing recalculation is | |
3368 | * not needed here. | |
3369 | */ | |
3370 | break; | |
3371 | case OSPF_AS_EXTERNAL_LSA: | |
3372 | case OSPF_AS_NSSA_LSA: | |
3373 | ospf_ase_incremental_update(ospf, lsa); | |
3374 | break; | |
3375 | default: | |
3376 | ospf_spf_calculate_schedule(ospf, | |
3377 | SPF_FLAG_MAXAGE); | |
3378 | break; | |
3379 | } | |
3380 | ospf_lsa_maxage(ospf, lsa); | |
3381 | } | |
3382 | ||
3383 | if (IS_LSA_MAXAGE(lsa) && !ospf_lsa_is_self_originated(ospf, lsa)) | |
3384 | if (LS_AGE(lsa) > OSPF_LSA_MAXAGE + 30) | |
3385 | printf("Eek! Shouldn't happen!\n"); | |
3386 | ||
3387 | return 0; | |
718e3744 | 3388 | } |
3389 | ||
3390 | /* Periodical check of MaxAge LSA. */ | |
e6685141 | 3391 | void ospf_lsa_maxage_walker(struct event *thread) |
d62a17ae | 3392 | { |
e16d030c | 3393 | struct ospf *ospf = EVENT_ARG(thread); |
d62a17ae | 3394 | struct route_node *rn; |
3395 | struct ospf_lsa *lsa; | |
3396 | struct ospf_area *area; | |
3397 | struct listnode *node, *nnode; | |
3398 | ||
3399 | ospf->t_maxage_walker = NULL; | |
3400 | ||
3401 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { | |
996c9314 | 3402 | LSDB_LOOP (ROUTER_LSDB(area), rn, lsa) |
044506e7 | 3403 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
996c9314 | 3404 | LSDB_LOOP (NETWORK_LSDB(area), rn, lsa) |
044506e7 | 3405 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
996c9314 | 3406 | LSDB_LOOP (SUMMARY_LSDB(area), rn, lsa) |
044506e7 | 3407 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
996c9314 | 3408 | LSDB_LOOP (ASBR_SUMMARY_LSDB(area), rn, lsa) |
044506e7 | 3409 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
996c9314 | 3410 | LSDB_LOOP (OPAQUE_AREA_LSDB(area), rn, lsa) |
044506e7 | 3411 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
996c9314 | 3412 | LSDB_LOOP (OPAQUE_LINK_LSDB(area), rn, lsa) |
044506e7 | 3413 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
996c9314 | 3414 | LSDB_LOOP (NSSA_LSDB(area), rn, lsa) |
044506e7 | 3415 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3416 | } |
3417 | ||
3418 | /* for AS-external-LSAs. */ | |
3419 | if (ospf->lsdb) { | |
996c9314 | 3420 | LSDB_LOOP (EXTERNAL_LSDB(ospf), rn, lsa) |
044506e7 | 3421 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
996c9314 | 3422 | LSDB_LOOP (OPAQUE_AS_LSDB(ospf), rn, lsa) |
044506e7 | 3423 | ospf_lsa_maxage_walker_remover(ospf, lsa); |
d62a17ae | 3424 | } |
3425 | ||
3426 | OSPF_TIMER_ON(ospf->t_maxage_walker, ospf_lsa_maxage_walker, | |
3427 | OSPF_LSA_MAXAGE_CHECK_INTERVAL); | |
d62a17ae | 3428 | } |
3429 | ||
d7c0a89a | 3430 | struct ospf_lsa *ospf_lsa_lookup_by_prefix(struct ospf_lsdb *lsdb, uint8_t type, |
d62a17ae | 3431 | struct prefix_ipv4 *p, |
3432 | struct in_addr router_id) | |
3433 | { | |
3434 | struct ospf_lsa *lsa; | |
3435 | struct in_addr mask, id; | |
3436 | struct lsa_header_mask { | |
3437 | struct lsa_header header; | |
3438 | struct in_addr mask; | |
3439 | } * hmask; | |
3440 | ||
3441 | lsa = ospf_lsdb_lookup_by_id(lsdb, type, p->prefix, router_id); | |
3442 | if (lsa == NULL) | |
3443 | return NULL; | |
3444 | ||
3445 | masklen2ip(p->prefixlen, &mask); | |
3446 | ||
3447 | hmask = (struct lsa_header_mask *)lsa->data; | |
3448 | ||
3449 | if (mask.s_addr != hmask->mask.s_addr) { | |
3450 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
3451 | lsa = ospf_lsdb_lookup_by_id(lsdb, type, id, router_id); | |
3452 | if (!lsa) | |
3453 | return NULL; | |
3454 | } | |
3455 | ||
3456 | return lsa; | |
3457 | } | |
3458 | ||
b5a8894d | 3459 | struct ospf_lsa *ospf_lsa_lookup(struct ospf *ospf, struct ospf_area *area, |
d7c0a89a | 3460 | uint32_t type, struct in_addr id, |
b5a8894d | 3461 | struct in_addr adv_router) |
d62a17ae | 3462 | { |
b5a8894d CS |
3463 | if (!ospf) |
3464 | return NULL; | |
d62a17ae | 3465 | |
3466 | switch (type) { | |
3467 | case OSPF_ROUTER_LSA: | |
3468 | case OSPF_NETWORK_LSA: | |
3469 | case OSPF_SUMMARY_LSA: | |
3470 | case OSPF_ASBR_SUMMARY_LSA: | |
3471 | case OSPF_AS_NSSA_LSA: | |
3472 | case OSPF_OPAQUE_LINK_LSA: | |
3473 | case OSPF_OPAQUE_AREA_LSA: | |
3474 | return ospf_lsdb_lookup_by_id(area->lsdb, type, id, adv_router); | |
3475 | case OSPF_AS_EXTERNAL_LSA: | |
3476 | case OSPF_OPAQUE_AS_LSA: | |
3477 | return ospf_lsdb_lookup_by_id(ospf->lsdb, type, id, adv_router); | |
3478 | default: | |
3479 | break; | |
3480 | } | |
3481 | ||
3482 | return NULL; | |
3483 | } | |
3484 | ||
d7c0a89a | 3485 | struct ospf_lsa *ospf_lsa_lookup_by_id(struct ospf_area *area, uint32_t type, |
d62a17ae | 3486 | struct in_addr id) |
3487 | { | |
3488 | struct ospf_lsa *lsa; | |
3489 | struct route_node *rn; | |
3490 | ||
3491 | switch (type) { | |
3492 | case OSPF_ROUTER_LSA: | |
3493 | return ospf_lsdb_lookup_by_id(area->lsdb, type, id, id); | |
3494 | case OSPF_NETWORK_LSA: | |
3495 | for (rn = route_top(NETWORK_LSDB(area)); rn; | |
3496 | rn = route_next(rn)) | |
3497 | if ((lsa = rn->info)) | |
3498 | if (IPV4_ADDR_SAME(&lsa->data->id, &id)) { | |
3499 | route_unlock_node(rn); | |
3500 | return lsa; | |
3501 | } | |
3502 | break; | |
3503 | case OSPF_SUMMARY_LSA: | |
3504 | case OSPF_ASBR_SUMMARY_LSA: | |
3505 | /* Currently not used. */ | |
3506 | assert(1); | |
3507 | return ospf_lsdb_lookup_by_id(area->lsdb, type, id, id); | |
3508 | case OSPF_AS_EXTERNAL_LSA: | |
3509 | case OSPF_AS_NSSA_LSA: | |
3510 | case OSPF_OPAQUE_LINK_LSA: | |
3511 | case OSPF_OPAQUE_AREA_LSA: | |
3512 | case OSPF_OPAQUE_AS_LSA: | |
3513 | /* Currently not used. */ | |
3514 | break; | |
3515 | default: | |
3516 | break; | |
3517 | } | |
3518 | ||
3519 | return NULL; | |
3520 | } | |
3521 | ||
3522 | struct ospf_lsa *ospf_lsa_lookup_by_header(struct ospf_area *area, | |
3523 | struct lsa_header *lsah) | |
3524 | { | |
3525 | struct ospf_lsa *match; | |
3526 | ||
3527 | /* | |
3528 | * Strictly speaking, the LSA-ID field for Opaque-LSAs (type-9/10/11) | |
3529 | * is redefined to have two subfields; opaque-type and opaque-id. | |
3530 | * However, it is harmless to treat the two sub fields together, as if | |
3531 | * they two were forming a unique LSA-ID. | |
3532 | */ | |
3533 | ||
b5a8894d CS |
3534 | match = ospf_lsa_lookup(area->ospf, area, lsah->type, lsah->id, |
3535 | lsah->adv_router); | |
d62a17ae | 3536 | |
3537 | if (match == NULL) | |
3538 | if (IS_DEBUG_OSPF(lsa, LSA) == OSPF_DEBUG_LSA) | |
96b663a3 MS |
3539 | zlog_debug("LSA[Type%d:%pI4]: Lookup by header, NO MATCH", |
3540 | lsah->type, &lsah->id); | |
d62a17ae | 3541 | |
3542 | return match; | |
718e3744 | 3543 | } |
3544 | ||
3545 | /* return +n, l1 is more recent. | |
3546 | return -n, l2 is more recent. | |
3547 | return 0, l1 and l2 is identical. */ | |
d62a17ae | 3548 | int ospf_lsa_more_recent(struct ospf_lsa *l1, struct ospf_lsa *l2) |
3549 | { | |
3550 | int r; | |
3551 | int x, y; | |
3552 | ||
3553 | if (l1 == NULL && l2 == NULL) | |
3554 | return 0; | |
3555 | if (l1 == NULL) | |
3556 | return -1; | |
3557 | if (l2 == NULL) | |
3558 | return 1; | |
3559 | ||
3560 | /* compare LS sequence number. */ | |
3561 | x = (int)ntohl(l1->data->ls_seqnum); | |
3562 | y = (int)ntohl(l2->data->ls_seqnum); | |
3563 | if (x > y) | |
3564 | return 1; | |
3565 | if (x < y) | |
3566 | return -1; | |
3567 | ||
3568 | /* compare LS checksum. */ | |
3569 | r = ntohs(l1->data->checksum) - ntohs(l2->data->checksum); | |
3570 | if (r) | |
3571 | return r; | |
3572 | ||
3573 | /* compare LS age. */ | |
3574 | if (IS_LSA_MAXAGE(l1) && !IS_LSA_MAXAGE(l2)) | |
3575 | return 1; | |
3576 | else if (!IS_LSA_MAXAGE(l1) && IS_LSA_MAXAGE(l2)) | |
3577 | return -1; | |
3578 | ||
3579 | /* compare LS age with MaxAgeDiff. */ | |
3580 | if (LS_AGE(l1) - LS_AGE(l2) > OSPF_LSA_MAXAGE_DIFF) | |
3581 | return -1; | |
3582 | else if (LS_AGE(l2) - LS_AGE(l1) > OSPF_LSA_MAXAGE_DIFF) | |
3583 | return 1; | |
3584 | ||
3585 | /* LSAs are identical. */ | |
3586 | return 0; | |
718e3744 | 3587 | } |
3588 | ||
1bb2674c RW |
3589 | /* |
3590 | * Check if two LSAs are different. | |
3591 | * | |
3592 | * l1 | |
3593 | * The first LSA to compare. | |
3594 | * | |
3595 | * l2 | |
3596 | * The second LSA to compare. | |
3597 | * | |
3598 | * ignore_rcvd_flag | |
3599 | * When set to true, ignore whether the LSAs were received from the network | |
3600 | * or not. This parameter should be set to true when checking for topology | |
3601 | * changes as part of the Graceful Restart helper neighbor procedures. | |
3602 | * | |
3603 | * Returns: | |
3604 | * true if the LSAs are different, false otherwise. | |
3605 | */ | |
3606 | int ospf_lsa_different(struct ospf_lsa *l1, struct ospf_lsa *l2, | |
3607 | bool ignore_rcvd_flag) | |
718e3744 | 3608 | { |
d62a17ae | 3609 | char *p1, *p2; |
3610 | assert(l1); | |
3611 | assert(l2); | |
3612 | assert(l1->data); | |
3613 | assert(l2->data); | |
718e3744 | 3614 | |
d62a17ae | 3615 | if (l1->data->options != l2->data->options) |
3616 | return 1; | |
718e3744 | 3617 | |
d62a17ae | 3618 | if (IS_LSA_MAXAGE(l1) && !IS_LSA_MAXAGE(l2)) |
3619 | return 1; | |
718e3744 | 3620 | |
d62a17ae | 3621 | if (IS_LSA_MAXAGE(l2) && !IS_LSA_MAXAGE(l1)) |
3622 | return 1; | |
718e3744 | 3623 | |
8db278b5 | 3624 | if (l1->size != l2->size) |
d62a17ae | 3625 | return 1; |
718e3744 | 3626 | |
8db278b5 | 3627 | if (l1->size == 0) |
d62a17ae | 3628 | return 1; |
718e3744 | 3629 | |
1bb2674c RW |
3630 | if (!ignore_rcvd_flag |
3631 | && CHECK_FLAG((l1->flags ^ l2->flags), OSPF_LSA_RECEIVED)) | |
d62a17ae | 3632 | return 1; /* May be a stale LSA in the LSBD */ |
5996e0df | 3633 | |
15c4dd82 LB |
3634 | if (l1->size == OSPF_LSA_HEADER_SIZE) |
3635 | return 0; /* nothing to compare */ | |
718e3744 | 3636 | |
d62a17ae | 3637 | p1 = (char *)l1->data; |
3638 | p2 = (char *)l2->data; | |
718e3744 | 3639 | |
d62a17ae | 3640 | if (memcmp(p1 + OSPF_LSA_HEADER_SIZE, p2 + OSPF_LSA_HEADER_SIZE, |
8db278b5 | 3641 | l1->size - OSPF_LSA_HEADER_SIZE) |
d62a17ae | 3642 | != 0) |
3643 | return 1; | |
718e3744 | 3644 | |
d62a17ae | 3645 | return 0; |
718e3744 | 3646 | } |
3647 | ||
d62a17ae | 3648 | int ospf_lsa_flush_schedule(struct ospf *ospf, struct ospf_lsa *lsa) |
3649 | { | |
3650 | if (lsa == NULL || !IS_LSA_SELF(lsa)) | |
3651 | return 0; | |
3652 | ||
3653 | if (IS_DEBUG_OSPF_EVENT) | |
3654 | zlog_debug( | |
96b663a3 MS |
3655 | "LSA[Type%d:%pI4]: Schedule self-originated LSA to FLUSH", |
3656 | lsa->data->type, &lsa->data->id); | |
d62a17ae | 3657 | |
3658 | /* Force given lsa's age to MaxAge. */ | |
3659 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
3660 | ||
3661 | switch (lsa->data->type) { | |
3662 | /* Opaque wants to be notified of flushes */ | |
3663 | case OSPF_OPAQUE_LINK_LSA: | |
3664 | case OSPF_OPAQUE_AREA_LSA: | |
3665 | case OSPF_OPAQUE_AS_LSA: | |
3666 | ospf_opaque_lsa_refresh(lsa); | |
3667 | break; | |
3668 | default: | |
3669 | ospf_refresher_unregister_lsa(ospf, lsa); | |
3670 | ospf_lsa_flush(ospf, lsa); | |
3671 | break; | |
3672 | } | |
3673 | ||
3674 | return 0; | |
3675 | } | |
3676 | ||
3677 | void ospf_flush_self_originated_lsas_now(struct ospf *ospf) | |
3678 | { | |
3679 | struct listnode *node, *nnode; | |
3680 | struct listnode *node2, *nnode2; | |
3681 | struct ospf_area *area; | |
3682 | struct ospf_interface *oi; | |
3683 | struct ospf_lsa *lsa; | |
3684 | struct route_node *rn; | |
ca5997cd | 3685 | struct ospf_if_params *oip; |
d62a17ae | 3686 | int need_to_flush_ase = 0; |
3687 | ||
046460a1 CS |
3688 | ospf->inst_shutdown = 1; |
3689 | ||
d62a17ae | 3690 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { |
3691 | if ((lsa = area->router_lsa_self) != NULL) { | |
3692 | if (IS_DEBUG_OSPF_EVENT) | |
3693 | zlog_debug( | |
96b663a3 | 3694 | "LSA[Type%d:%pI4]: Schedule self-originated LSA to FLUSH", |
d62a17ae | 3695 | lsa->data->type, |
96b663a3 | 3696 | &lsa->data->id); |
d62a17ae | 3697 | |
3698 | ospf_refresher_unregister_lsa(ospf, lsa); | |
3699 | ospf_lsa_flush_area(lsa, area); | |
3700 | ospf_lsa_unlock(&area->router_lsa_self); | |
3701 | area->router_lsa_self = NULL; | |
3702 | } | |
3703 | ||
3704 | for (ALL_LIST_ELEMENTS(area->oiflist, node2, nnode2, oi)) { | |
3705 | if ((lsa = oi->network_lsa_self) != NULL | |
3706 | && oi->state == ISM_DR && oi->full_nbrs > 0) { | |
3707 | if (IS_DEBUG_OSPF_EVENT) | |
3708 | zlog_debug( | |
96b663a3 | 3709 | "LSA[Type%d:%pI4]: Schedule self-originated LSA to FLUSH", |
d62a17ae | 3710 | lsa->data->type, |
96b663a3 | 3711 | &lsa->data->id); |
d62a17ae | 3712 | |
3713 | ospf_refresher_unregister_lsa( | |
3714 | ospf, oi->network_lsa_self); | |
3715 | ospf_lsa_flush_area(oi->network_lsa_self, area); | |
3716 | ospf_lsa_unlock(&oi->network_lsa_self); | |
3717 | oi->network_lsa_self = NULL; | |
ca5997cd MR |
3718 | |
3719 | oip = ospf_lookup_if_params( | |
3720 | oi->ifp, oi->address->u.prefix4); | |
3721 | if (oip) | |
3722 | oip->network_lsa_seqnum = htonl( | |
3723 | OSPF_INVALID_SEQUENCE_NUMBER); | |
d62a17ae | 3724 | } |
3725 | ||
3726 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK | |
3727 | && area->external_routing == OSPF_AREA_DEFAULT) | |
3728 | need_to_flush_ase = 1; | |
3729 | } | |
3730 | ||
996c9314 | 3731 | LSDB_LOOP (SUMMARY_LSDB(area), rn, lsa) |
044506e7 | 3732 | ospf_lsa_flush_schedule(ospf, lsa); |
996c9314 | 3733 | LSDB_LOOP (ASBR_SUMMARY_LSDB(area), rn, lsa) |
044506e7 | 3734 | ospf_lsa_flush_schedule(ospf, lsa); |
996c9314 | 3735 | LSDB_LOOP (OPAQUE_LINK_LSDB(area), rn, lsa) |
044506e7 | 3736 | ospf_lsa_flush_schedule(ospf, lsa); |
996c9314 | 3737 | LSDB_LOOP (OPAQUE_AREA_LSDB(area), rn, lsa) |
044506e7 | 3738 | ospf_lsa_flush_schedule(ospf, lsa); |
d62a17ae | 3739 | } |
3740 | ||
3741 | if (need_to_flush_ase) { | |
996c9314 | 3742 | LSDB_LOOP (EXTERNAL_LSDB(ospf), rn, lsa) |
044506e7 | 3743 | ospf_lsa_flush_schedule(ospf, lsa); |
996c9314 | 3744 | LSDB_LOOP (OPAQUE_AS_LSDB(ospf), rn, lsa) |
044506e7 | 3745 | ospf_lsa_flush_schedule(ospf, lsa); |
d62a17ae | 3746 | } |
3747 | ||
3748 | /* | |
3749 | * Make sure that the MaxAge LSA remover is executed immediately, | |
3750 | * without conflicting to other threads. | |
3751 | */ | |
3752 | if (ospf->t_maxage != NULL) { | |
e16d030c | 3753 | EVENT_OFF(ospf->t_maxage); |
8c1186d3 | 3754 | event_execute(master, ospf_maxage_lsa_remover, ospf, 0); |
d62a17ae | 3755 | } |
3756 | ||
3757 | return; | |
718e3744 | 3758 | } |
718e3744 | 3759 | |
516c4c66 MN |
3760 | /** @brief Function to refresh all the self originated |
3761 | * LSAs for area, when FR state change happens. | |
3762 | * @param area pointer. | |
3763 | * @return Void. | |
3764 | */ | |
3765 | void ospf_refresh_area_self_lsas(struct ospf_area *area) | |
3766 | { | |
3767 | struct listnode *node2; | |
3768 | struct listnode *nnode2; | |
3769 | struct ospf_interface *oi; | |
3770 | struct route_node *rn; | |
3771 | struct ospf_lsa *lsa; | |
3772 | ||
3773 | if (!area) | |
3774 | return; | |
3775 | ||
3776 | if (area->router_lsa_self) | |
3777 | ospf_lsa_refresh(area->ospf, area->router_lsa_self); | |
3778 | ||
3779 | for (ALL_LIST_ELEMENTS(area->oiflist, node2, nnode2, oi)) | |
3780 | if (oi->network_lsa_self) | |
3781 | ospf_lsa_refresh(oi->ospf, oi->network_lsa_self); | |
3782 | ||
3783 | LSDB_LOOP (SUMMARY_LSDB(area), rn, lsa) | |
3784 | if (IS_LSA_SELF(lsa)) | |
3785 | ospf_lsa_refresh(area->ospf, lsa); | |
3786 | LSDB_LOOP (ASBR_SUMMARY_LSDB(area), rn, lsa) | |
3787 | if (IS_LSA_SELF(lsa)) | |
3788 | ospf_lsa_refresh(area->ospf, lsa); | |
3789 | LSDB_LOOP (OPAQUE_LINK_LSDB(area), rn, lsa) | |
3790 | if (IS_LSA_SELF(lsa)) | |
3791 | ospf_lsa_refresh(area->ospf, lsa); | |
3792 | LSDB_LOOP (OPAQUE_AREA_LSDB(area), rn, lsa) | |
3793 | if (IS_LSA_SELF(lsa)) | |
3794 | ospf_lsa_refresh(area->ospf, lsa); | |
3795 | LSDB_LOOP (EXTERNAL_LSDB(area->ospf), rn, lsa) | |
3796 | if (IS_LSA_SELF(lsa)) | |
3797 | ospf_lsa_refresh(area->ospf, lsa); | |
3798 | LSDB_LOOP (OPAQUE_AS_LSDB(area->ospf), rn, lsa) | |
3799 | if (IS_LSA_SELF(lsa)) | |
3800 | ospf_lsa_refresh(area->ospf, lsa); | |
3801 | } | |
3802 | ||
718e3744 | 3803 | /* If there is self-originated LSA, then return 1, otherwise return 0. */ |
3804 | /* An interface-independent version of ospf_lsa_is_self_originated */ | |
d62a17ae | 3805 | int ospf_lsa_is_self_originated(struct ospf *ospf, struct ospf_lsa *lsa) |
3806 | { | |
3807 | struct listnode *node; | |
3808 | struct ospf_interface *oi; | |
3809 | ||
3810 | /* This LSA is already checked. */ | |
3811 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_SELF_CHECKED)) | |
3812 | return IS_LSA_SELF(lsa); | |
3813 | ||
3814 | /* Make sure LSA is self-checked. */ | |
3815 | SET_FLAG(lsa->flags, OSPF_LSA_SELF_CHECKED); | |
3816 | ||
3817 | /* AdvRouter and Router ID is the same. */ | |
3818 | if (IPV4_ADDR_SAME(&lsa->data->adv_router, &ospf->router_id)) | |
3819 | SET_FLAG(lsa->flags, OSPF_LSA_SELF); | |
3820 | ||
3821 | /* LSA is router-LSA. */ | |
3822 | else if (lsa->data->type == OSPF_ROUTER_LSA | |
3823 | && IPV4_ADDR_SAME(&lsa->data->id, &ospf->router_id)) | |
3824 | SET_FLAG(lsa->flags, OSPF_LSA_SELF); | |
3825 | ||
3826 | /* LSA is network-LSA. Compare Link ID with all interfaces. */ | |
3827 | else if (lsa->data->type == OSPF_NETWORK_LSA) | |
3828 | for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi)) { | |
3829 | /* Ignore virtual link. */ | |
3830 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
3831 | if (oi->address->family == AF_INET) | |
3832 | if (IPV4_ADDR_SAME( | |
3833 | &lsa->data->id, | |
3834 | &oi->address->u.prefix4)) { | |
3835 | /* to make it easier later */ | |
3836 | SET_FLAG(lsa->flags, | |
3837 | OSPF_LSA_SELF); | |
3838 | return IS_LSA_SELF(lsa); | |
3839 | } | |
3840 | } | |
3841 | ||
3842 | return IS_LSA_SELF(lsa); | |
718e3744 | 3843 | } |
3844 | ||
3845 | /* Get unique Link State ID. */ | |
a8c22275 | 3846 | enum lsid_status ospf_lsa_unique_id(struct ospf *ospf, struct ospf_lsdb *lsdb, |
3847 | uint8_t type, struct prefix_ipv4 *p, | |
3848 | struct in_addr *id) | |
d62a17ae | 3849 | { |
3850 | struct ospf_lsa *lsa; | |
a8c22275 | 3851 | struct in_addr mask; |
d62a17ae | 3852 | |
a8c22275 | 3853 | *id = p->prefix; |
d62a17ae | 3854 | |
3855 | /* Check existence of LSA instance. */ | |
a8c22275 | 3856 | lsa = ospf_lsdb_lookup_by_id(lsdb, type, *id, ospf->router_id); |
d62a17ae | 3857 | if (lsa) { |
3858 | struct as_external_lsa *al = | |
3859 | (struct as_external_lsa *)lsa->data; | |
a8c22275 | 3860 | /* Ref rfc2328,Appendex E.1 |
3861 | * If router already originated the external lsa with lsid | |
3862 | * as the current prefix, and the masklens are same then | |
3863 | * terminate the LSID algorithem. | |
3864 | */ | |
d62a17ae | 3865 | if (ip_masklen(al->mask) == p->prefixlen) { |
3866 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
3867 | zlog_debug( | |
a8c22275 | 3868 | "%s: Can't get Link State ID for %pFX", |
3869 | __func__, p); | |
d62a17ae | 3870 | /* id.s_addr = 0; */ |
a8c22275 | 3871 | id->s_addr = 0xffffffff; |
3872 | return LSID_NOT_AVAILABLE; | |
3873 | } else if (ip_masklen(al->mask) < p->prefixlen) { | |
3874 | /* Ref rfc2328,Appendex E.2 | |
3875 | * the current prefix masklen is greater than the | |
3876 | * existing LSA, then generate the Link state ID, | |
3877 | * by setting all host bits in prefix addressa and | |
3878 | * originate. | |
3879 | * | |
3880 | * Eg: 1st Route : 10.0.0.0/16 - LSID:10.0.0.0 | |
3881 | * 2nd Route : 10.0.0.0/24 - LSID:10.0.0.255 | |
3882 | */ | |
d62a17ae | 3883 | masklen2ip(p->prefixlen, &mask); |
3884 | ||
a8c22275 | 3885 | id->s_addr = p->prefix.s_addr | (~mask.s_addr); |
3886 | lsa = ospf_lsdb_lookup_by_id(ospf->lsdb, type, *id, | |
d62a17ae | 3887 | ospf->router_id); |
3888 | if (lsa) { | |
3889 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
3890 | zlog_debug( | |
a8c22275 | 3891 | "%s: Can't get Link State ID for %pFX", |
3892 | __func__, p); | |
3893 | id->s_addr = 0xffffffff; | |
3894 | return LSID_NOT_AVAILABLE; | |
3895 | } | |
3896 | } else { | |
3897 | /* Ref rfc2328,Appendex E.3 | |
3898 | * the current prefix masklen is lesser than the | |
3899 | * existing LSA,then the originated LSA has to be | |
3900 | * refreshed by modifying masklen, cost and tag. | |
3901 | * Originate the old route info with new LSID by | |
3902 | * setting the host bits in prefix address. | |
3903 | * | |
3904 | * Eg: 1st Route : 10.0.0.0/24 - LSID:10.0.0.0 | |
3905 | * 2nd Route : 10.0.0.0/16 - ? | |
3906 | * Since 2nd route mask len is less than firstone | |
3907 | * LSID has to be changed. | |
3908 | * 1st route LSID:10.0.0.255 | |
3909 | * 2nd route LSID:10.0.0.0 | |
3910 | */ | |
3911 | id->s_addr = lsa->data->id.s_addr | (~al->mask.s_addr); | |
3912 | lsa = ospf_lsdb_lookup_by_id(ospf->lsdb, type, *id, | |
3913 | ospf->router_id); | |
3914 | if (lsa && (ip_masklen(al->mask) != IPV4_MAX_BITLEN)) { | |
3915 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
3916 | zlog_debug( | |
3917 | "%s: Can't get Link State ID for %pFX", | |
3918 | __func__, p); | |
3919 | id->s_addr = 0xffffffff; | |
3920 | return LSID_NOT_AVAILABLE; | |
d62a17ae | 3921 | } |
a8c22275 | 3922 | return LSID_CHANGE; |
d62a17ae | 3923 | } |
3924 | } | |
3925 | ||
a8c22275 | 3926 | return LSID_AVAILABLE; |
718e3744 | 3927 | } |
3928 | ||
6b0655a2 | 3929 | |
70461d79 PJ |
3930 | #define LSA_ACTION_FLOOD_AREA 1 |
3931 | #define LSA_ACTION_FLUSH_AREA 2 | |
718e3744 | 3932 | |
d62a17ae | 3933 | struct lsa_action { |
d7c0a89a | 3934 | uint8_t action; |
d62a17ae | 3935 | struct ospf_area *area; |
3936 | struct ospf_lsa *lsa; | |
718e3744 | 3937 | }; |
3938 | ||
e6685141 | 3939 | static void ospf_lsa_action(struct event *t) |
718e3744 | 3940 | { |
d62a17ae | 3941 | struct lsa_action *data; |
718e3744 | 3942 | |
e16d030c | 3943 | data = EVENT_ARG(t); |
718e3744 | 3944 | |
d62a17ae | 3945 | if (IS_DEBUG_OSPF(lsa, LSA) == OSPF_DEBUG_LSA) |
3946 | zlog_debug("LSA[Action]: Performing scheduled LSA action: %d", | |
3947 | data->action); | |
718e3744 | 3948 | |
d62a17ae | 3949 | switch (data->action) { |
3950 | case LSA_ACTION_FLOOD_AREA: | |
3951 | ospf_flood_through_area(data->area, NULL, data->lsa); | |
3952 | break; | |
3953 | case LSA_ACTION_FLUSH_AREA: | |
3954 | ospf_lsa_flush_area(data->lsa, data->area); | |
3955 | break; | |
3956 | } | |
718e3744 | 3957 | |
d62a17ae | 3958 | ospf_lsa_unlock(&data->lsa); /* Message */ |
3959 | XFREE(MTYPE_OSPF_MESSAGE, data); | |
718e3744 | 3960 | } |
3961 | ||
d62a17ae | 3962 | void ospf_schedule_lsa_flood_area(struct ospf_area *area, struct ospf_lsa *lsa) |
718e3744 | 3963 | { |
d62a17ae | 3964 | struct lsa_action *data; |
718e3744 | 3965 | |
d62a17ae | 3966 | data = XCALLOC(MTYPE_OSPF_MESSAGE, sizeof(struct lsa_action)); |
3967 | data->action = LSA_ACTION_FLOOD_AREA; | |
3968 | data->area = area; | |
3969 | data->lsa = ospf_lsa_lock(lsa); /* Message / Flood area */ | |
718e3744 | 3970 | |
907a2395 | 3971 | event_add_event(master, ospf_lsa_action, data, 0, NULL); |
718e3744 | 3972 | } |
3973 | ||
d62a17ae | 3974 | void ospf_schedule_lsa_flush_area(struct ospf_area *area, struct ospf_lsa *lsa) |
718e3744 | 3975 | { |
d62a17ae | 3976 | struct lsa_action *data; |
718e3744 | 3977 | |
d62a17ae | 3978 | data = XCALLOC(MTYPE_OSPF_MESSAGE, sizeof(struct lsa_action)); |
3979 | data->action = LSA_ACTION_FLUSH_AREA; | |
3980 | data->area = area; | |
3981 | data->lsa = ospf_lsa_lock(lsa); /* Message / Flush area */ | |
718e3744 | 3982 | |
907a2395 | 3983 | event_add_event(master, ospf_lsa_action, data, 0, NULL); |
718e3744 | 3984 | } |
3985 | ||
6b0655a2 | 3986 | |
718e3744 | 3987 | /* LSA Refreshment functions. */ |
d62a17ae | 3988 | struct ospf_lsa *ospf_lsa_refresh(struct ospf *ospf, struct ospf_lsa *lsa) |
3989 | { | |
3990 | struct external_info *ei; | |
960417cf | 3991 | struct ospf_external_aggr_rt *aggr; |
d62a17ae | 3992 | struct ospf_lsa *new = NULL; |
960417cf | 3993 | struct as_external_lsa *al; |
3994 | struct prefix_ipv4 p; | |
3995 | ||
405e1c84 DA |
3996 | assert(CHECK_FLAG(lsa->flags, OSPF_LSA_SELF)); |
3997 | assert(IS_LSA_SELF(lsa)); | |
d62a17ae | 3998 | assert(lsa->lock > 0); |
3999 | ||
4000 | switch (lsa->data->type) { | |
4001 | /* Router and Network LSAs are processed differently. */ | |
4002 | case OSPF_ROUTER_LSA: | |
4003 | new = ospf_router_lsa_refresh(lsa); | |
4004 | break; | |
4005 | case OSPF_NETWORK_LSA: | |
4006 | new = ospf_network_lsa_refresh(lsa); | |
4007 | break; | |
4008 | case OSPF_SUMMARY_LSA: | |
4009 | new = ospf_summary_lsa_refresh(ospf, lsa); | |
4010 | break; | |
4011 | case OSPF_ASBR_SUMMARY_LSA: | |
4012 | new = ospf_summary_asbr_lsa_refresh(ospf, lsa); | |
4013 | break; | |
4014 | case OSPF_AS_EXTERNAL_LSA: | |
4015 | /* Translated from NSSA Type-5s are refreshed when | |
4016 | * from refresh of Type-7 - do not refresh these directly. | |
4017 | */ | |
960417cf | 4018 | |
4019 | al = (struct as_external_lsa *)lsa->data; | |
4020 | p.family = AF_INET; | |
4021 | p.prefixlen = ip_masklen(al->mask); | |
4022 | p.prefix = lsa->data->id; | |
4023 | ||
d62a17ae | 4024 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT)) |
4025 | break; | |
b5a8894d | 4026 | ei = ospf_external_info_check(ospf, lsa); |
d62a17ae | 4027 | if (ei) |
63f0e941 | 4028 | new = ospf_external_lsa_refresh( |
4029 | ospf, lsa, ei, LSA_REFRESH_FORCE, false); | |
960417cf | 4030 | else { |
4031 | aggr = (struct ospf_external_aggr_rt *) | |
4032 | ospf_extrenal_aggregator_lookup(ospf, &p); | |
4033 | if (aggr) { | |
4034 | struct external_info ei_aggr; | |
4035 | ||
6006b807 | 4036 | memset(&ei_aggr, 0, sizeof(ei_aggr)); |
960417cf | 4037 | ei_aggr.p = aggr->p; |
4038 | ei_aggr.tag = aggr->tag; | |
4039 | ei_aggr.instance = ospf->instance; | |
4040 | ei_aggr.route_map_set.metric = -1; | |
4041 | ei_aggr.route_map_set.metric_type = -1; | |
4042 | ||
4043 | ospf_external_lsa_refresh(ospf, lsa, &ei_aggr, | |
4044 | LSA_REFRESH_FORCE, true); | |
d2e84005 MR |
4045 | SET_FLAG(aggr->flags, |
4046 | OSPF_EXTERNAL_AGGRT_ORIGINATED); | |
960417cf | 4047 | } else |
4048 | ospf_lsa_flush_as(ospf, lsa); | |
4049 | } | |
d62a17ae | 4050 | break; |
4051 | case OSPF_OPAQUE_LINK_LSA: | |
4052 | case OSPF_OPAQUE_AREA_LSA: | |
4053 | case OSPF_OPAQUE_AS_LSA: | |
4054 | new = ospf_opaque_lsa_refresh(lsa); | |
4055 | break; | |
4056 | default: | |
4057 | break; | |
4058 | } | |
4059 | return new; | |
718e3744 | 4060 | } |
4061 | ||
d62a17ae | 4062 | void ospf_refresher_register_lsa(struct ospf *ospf, struct ospf_lsa *lsa) |
4063 | { | |
d7c0a89a | 4064 | uint16_t index, current_index; |
d62a17ae | 4065 | |
4066 | assert(lsa->lock > 0); | |
405e1c84 | 4067 | assert(IS_LSA_SELF(lsa)); |
d62a17ae | 4068 | |
4069 | if (lsa->refresh_list < 0) { | |
4070 | int delay; | |
4071 | int min_delay = | |
b345a3d9 MN |
4072 | ospf->lsa_refresh_timer - (2 * OSPF_LS_REFRESH_JITTER); |
4073 | int max_delay = | |
4074 | ospf->lsa_refresh_timer - OSPF_LS_REFRESH_JITTER; | |
d62a17ae | 4075 | |
4076 | /* We want to refresh the LSA within OSPF_LS_REFRESH_TIME which | |
4077 | * is | |
4078 | * 1800s. Use jitter so that we send the LSA sometime between | |
4079 | * 1680s | |
4080 | * and 1740s. | |
4081 | */ | |
5920b3eb RZ |
4082 | delay = (frr_weak_random() % (max_delay - min_delay)) |
4083 | + min_delay; | |
d62a17ae | 4084 | |
4085 | current_index = ospf->lsa_refresh_queue.index | |
4086 | + (monotime(NULL) - ospf->lsa_refresher_started) | |
4087 | / OSPF_LSA_REFRESHER_GRANULARITY; | |
4088 | ||
4089 | index = (current_index + delay / OSPF_LSA_REFRESHER_GRANULARITY) | |
4090 | % (OSPF_LSA_REFRESHER_SLOTS); | |
4091 | ||
4092 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
4093 | zlog_debug( | |
96b663a3 MS |
4094 | "LSA[Refresh:Type%d:%pI4]: age %d, added to index %d", |
4095 | lsa->data->type, &lsa->data->id, | |
d62a17ae | 4096 | LS_AGE(lsa), index); |
4097 | ||
4098 | if (!ospf->lsa_refresh_queue.qs[index]) | |
4099 | ospf->lsa_refresh_queue.qs[index] = list_new(); | |
4100 | ||
4101 | listnode_add(ospf->lsa_refresh_queue.qs[index], | |
4102 | ospf_lsa_lock(lsa)); /* lsa_refresh_queue */ | |
4103 | lsa->refresh_list = index; | |
4104 | ||
4105 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
4106 | zlog_debug( | |
e6f3b262 | 4107 | "LSA[Refresh:Type%d:%pI4]: %s: setting refresh_list on lsa %p (slot %d)", |
4108 | lsa->data->type, &lsa->data->id, __func__, | |
4109 | (void *)lsa, index); | |
d62a17ae | 4110 | } |
4111 | } | |
4112 | ||
4113 | void ospf_refresher_unregister_lsa(struct ospf *ospf, struct ospf_lsa *lsa) | |
4114 | { | |
4115 | assert(lsa->lock > 0); | |
405e1c84 | 4116 | assert(IS_LSA_SELF(lsa)); |
d62a17ae | 4117 | if (lsa->refresh_list >= 0) { |
4118 | struct list *refresh_list = | |
4119 | ospf->lsa_refresh_queue.qs[lsa->refresh_list]; | |
4120 | listnode_delete(refresh_list, lsa); | |
4121 | if (!listcount(refresh_list)) { | |
6a154c88 | 4122 | list_delete(&refresh_list); |
d62a17ae | 4123 | ospf->lsa_refresh_queue.qs[lsa->refresh_list] = NULL; |
4124 | } | |
d62a17ae | 4125 | lsa->refresh_list = -1; |
a61b32f0 | 4126 | ospf_lsa_unlock(&lsa); /* lsa_refresh_queue */ |
d62a17ae | 4127 | } |
4128 | } | |
4129 | ||
e6685141 | 4130 | void ospf_lsa_refresh_walker(struct event *t) |
d62a17ae | 4131 | { |
4132 | struct list *refresh_list; | |
4133 | struct listnode *node, *nnode; | |
e16d030c | 4134 | struct ospf *ospf = EVENT_ARG(t); |
d62a17ae | 4135 | struct ospf_lsa *lsa; |
4136 | int i; | |
4137 | struct list *lsa_to_refresh = list_new(); | |
516c4c66 | 4138 | bool dna_lsa; |
d62a17ae | 4139 | |
4140 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
e6f3b262 | 4141 | zlog_debug("LSA[Refresh]: %s: start", __func__); |
d62a17ae | 4142 | |
4143 | ||
4144 | i = ospf->lsa_refresh_queue.index; | |
4145 | ||
4146 | /* Note: if clock has jumped backwards, then time change could be | |
4147 | negative, | |
4148 | so we are careful to cast the expression to unsigned before taking | |
4149 | modulus. */ | |
4150 | ospf->lsa_refresh_queue.index = | |
4151 | ((unsigned long)(ospf->lsa_refresh_queue.index | |
4152 | + (monotime(NULL) | |
4153 | - ospf->lsa_refresher_started) | |
4154 | / OSPF_LSA_REFRESHER_GRANULARITY)) | |
4155 | % OSPF_LSA_REFRESHER_SLOTS; | |
4156 | ||
4157 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
e6f3b262 | 4158 | zlog_debug("LSA[Refresh]: %s: next index %d", __func__, |
4159 | ospf->lsa_refresh_queue.index); | |
d62a17ae | 4160 | |
4161 | for (; i != ospf->lsa_refresh_queue.index; | |
4162 | i = (i + 1) % OSPF_LSA_REFRESHER_SLOTS) { | |
4163 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
e6f3b262 | 4164 | zlog_debug("LSA[Refresh]: %s: refresh index %d", |
4165 | __func__, i); | |
d62a17ae | 4166 | |
4167 | refresh_list = ospf->lsa_refresh_queue.qs[i]; | |
4168 | ||
4169 | assert(i >= 0); | |
4170 | ||
4171 | ospf->lsa_refresh_queue.qs[i] = NULL; | |
4172 | ||
4173 | if (refresh_list) { | |
4174 | for (ALL_LIST_ELEMENTS(refresh_list, node, nnode, | |
4175 | lsa)) { | |
4176 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
4177 | zlog_debug( | |
e6f3b262 | 4178 | "LSA[Refresh:Type%d:%pI4]: %s: refresh lsa %p (slot %d)", |
4179 | lsa->data->type, &lsa->data->id, | |
4180 | __func__, (void *)lsa, i); | |
d62a17ae | 4181 | |
4182 | assert(lsa->lock > 0); | |
4183 | list_delete_node(refresh_list, node); | |
4184 | lsa->refresh_list = -1; | |
4185 | listnode_add(lsa_to_refresh, lsa); | |
4186 | } | |
6a154c88 | 4187 | list_delete(&refresh_list); |
d62a17ae | 4188 | } |
4189 | } | |
4190 | ||
4191 | ospf->t_lsa_refresher = NULL; | |
907a2395 DS |
4192 | event_add_timer(master, ospf_lsa_refresh_walker, ospf, |
4193 | ospf->lsa_refresh_interval, &ospf->t_lsa_refresher); | |
d62a17ae | 4194 | ospf->lsa_refresher_started = monotime(NULL); |
4195 | ||
4196 | for (ALL_LIST_ELEMENTS(lsa_to_refresh, node, nnode, lsa)) { | |
516c4c66 MN |
4197 | dna_lsa = ospf_check_dna_lsa(lsa); |
4198 | if (!dna_lsa) { /* refresh only non-DNA LSAs */ | |
4199 | ospf_lsa_refresh(ospf, lsa); | |
516c4c66 | 4200 | } |
1746f71b MN |
4201 | assert(lsa->lock > 0); |
4202 | ospf_lsa_unlock(&lsa); /* lsa_refresh_queue & temp for | |
4203 | * lsa_to_refresh. | |
4204 | */ | |
d62a17ae | 4205 | } |
4206 | ||
6a154c88 | 4207 | list_delete(&lsa_to_refresh); |
d62a17ae | 4208 | |
4209 | if (IS_DEBUG_OSPF(lsa, LSA_REFRESH)) | |
e6f3b262 | 4210 | zlog_debug("LSA[Refresh]: %s: end", __func__); |
d62a17ae | 4211 | } |
44445dee S |
4212 | |
4213 | /* Flush the LSAs for the specific area */ | |
4214 | void ospf_flush_lsa_from_area(struct ospf *ospf, struct in_addr area_id, | |
4215 | int type) | |
4216 | { | |
4217 | struct ospf_area *area; | |
4218 | struct route_node *rn; | |
4219 | struct ospf_lsa *lsa; | |
4220 | ||
4221 | area = ospf_area_get(ospf, area_id); | |
4222 | ||
4223 | switch (type) { | |
4224 | case OSPF_AS_EXTERNAL_LSA: | |
4225 | if ((area->external_routing == OSPF_AREA_NSSA) || | |
4226 | (area->external_routing == OSPF_AREA_STUB)) { | |
4227 | LSDB_LOOP (EXTERNAL_LSDB(ospf), rn, lsa) | |
4228 | if (IS_LSA_SELF(lsa) && | |
4229 | !(CHECK_FLAG(lsa->flags, | |
4230 | OSPF_LSA_LOCAL_XLT))) | |
4231 | ospf_lsa_flush_area(lsa, area); | |
4232 | } | |
4233 | break; | |
4234 | case OSPF_AS_NSSA_LSA: | |
4235 | LSDB_LOOP (NSSA_LSDB(area), rn, lsa) | |
4236 | if (IS_LSA_SELF(lsa)) | |
4237 | ospf_lsa_flush_area(lsa, area); | |
4238 | break; | |
4239 | default: | |
4240 | break; | |
4241 | } | |
4242 | } |