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