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718e3744 | 1 | /* |
2 | * OSPF Link State Advertisement | |
3 | * Copyright (C) 1999, 2000 Toshiaki Takada | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "linklist.h" | |
26 | #include "prefix.h" | |
27 | #include "if.h" | |
28 | #include "table.h" | |
29 | #include "memory.h" | |
30 | #include "stream.h" | |
31 | #include "log.h" | |
32 | #include "thread.h" | |
33 | #include "hash.h" | |
34 | #include "sockunion.h" /* for inet_aton() */ | |
6a270cd9 | 35 | #include "checksum.h" |
718e3744 | 36 | |
37 | #include "ospfd/ospfd.h" | |
38 | #include "ospfd/ospf_interface.h" | |
39 | #include "ospfd/ospf_ism.h" | |
40 | #include "ospfd/ospf_asbr.h" | |
41 | #include "ospfd/ospf_lsa.h" | |
42 | #include "ospfd/ospf_lsdb.h" | |
43 | #include "ospfd/ospf_neighbor.h" | |
44 | #include "ospfd/ospf_nsm.h" | |
45 | #include "ospfd/ospf_flood.h" | |
46 | #include "ospfd/ospf_packet.h" | |
47 | #include "ospfd/ospf_spf.h" | |
48 | #include "ospfd/ospf_dump.h" | |
49 | #include "ospfd/ospf_route.h" | |
50 | #include "ospfd/ospf_ase.h" | |
51 | #include "ospfd/ospf_zebra.h" | |
52 | ||
53 | \f | |
54 | u_int32_t | |
55 | get_metric (u_char *metric) | |
56 | { | |
57 | u_int32_t m; | |
58 | m = metric[0]; | |
59 | m = (m << 8) + metric[1]; | |
60 | m = (m << 8) + metric[2]; | |
61 | return m; | |
62 | } | |
63 | ||
64 | \f | |
65 | struct timeval | |
66 | tv_adjust (struct timeval a) | |
67 | { | |
68 | while (a.tv_usec >= 1000000) | |
69 | { | |
70 | a.tv_usec -= 1000000; | |
71 | a.tv_sec++; | |
72 | } | |
73 | ||
74 | while (a.tv_usec < 0) | |
75 | { | |
76 | a.tv_usec += 1000000; | |
77 | a.tv_sec--; | |
78 | } | |
79 | ||
80 | return a; | |
81 | } | |
82 | ||
83 | int | |
84 | tv_ceil (struct timeval a) | |
85 | { | |
86 | a = tv_adjust (a); | |
87 | ||
88 | return (a.tv_usec ? a.tv_sec + 1 : a.tv_sec); | |
89 | } | |
90 | ||
91 | int | |
92 | tv_floor (struct timeval a) | |
93 | { | |
94 | a = tv_adjust (a); | |
95 | ||
96 | return a.tv_sec; | |
97 | } | |
98 | ||
99 | struct timeval | |
100 | int2tv (int a) | |
101 | { | |
102 | struct timeval ret; | |
103 | ||
104 | ret.tv_sec = a; | |
105 | ret.tv_usec = 0; | |
106 | ||
107 | return ret; | |
108 | } | |
109 | ||
110 | struct timeval | |
111 | tv_add (struct timeval a, struct timeval b) | |
112 | { | |
113 | struct timeval ret; | |
114 | ||
115 | ret.tv_sec = a.tv_sec + b.tv_sec; | |
116 | ret.tv_usec = a.tv_usec + b.tv_usec; | |
117 | ||
118 | return tv_adjust (ret); | |
119 | } | |
120 | ||
121 | struct timeval | |
122 | tv_sub (struct timeval a, struct timeval b) | |
123 | { | |
124 | struct timeval ret; | |
125 | ||
126 | ret.tv_sec = a.tv_sec - b.tv_sec; | |
127 | ret.tv_usec = a.tv_usec - b.tv_usec; | |
128 | ||
129 | return tv_adjust (ret); | |
130 | } | |
131 | ||
132 | int | |
133 | tv_cmp (struct timeval a, struct timeval b) | |
134 | { | |
135 | return (a.tv_sec == b.tv_sec ? | |
136 | a.tv_usec - b.tv_usec : a.tv_sec - b.tv_sec); | |
137 | } | |
138 | ||
139 | int | |
140 | ospf_lsa_refresh_delay (struct ospf_lsa *lsa) | |
141 | { | |
142 | struct timeval delta, now; | |
143 | int delay = 0; | |
144 | ||
2518efd1 | 145 | quagga_gettime (QUAGGA_CLK_MONOTONIC, &now); |
718e3744 | 146 | delta = tv_sub (now, lsa->tv_orig); |
147 | ||
148 | if (tv_cmp (delta, int2tv (OSPF_MIN_LS_INTERVAL)) < 0) | |
149 | { | |
150 | delay = tv_ceil (tv_sub (int2tv (OSPF_MIN_LS_INTERVAL), delta)); | |
151 | ||
152 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 153 | zlog_debug ("LSA[Type%d:%s]: Refresh timer delay %d seconds", |
718e3744 | 154 | lsa->data->type, inet_ntoa (lsa->data->id), delay); |
155 | ||
156 | assert (delay > 0); | |
157 | } | |
158 | ||
159 | return delay; | |
160 | } | |
161 | ||
162 | \f | |
163 | int | |
164 | get_age (struct ospf_lsa *lsa) | |
165 | { | |
166 | int age; | |
718e3744 | 167 | |
2518efd1 PJ |
168 | age = ntohs (lsa->data->ls_age) |
169 | + tv_floor (tv_sub (recent_relative_time (), lsa->tv_recv)); | |
718e3744 | 170 | |
171 | return age; | |
172 | } | |
173 | ||
174 | \f | |
175 | /* Fletcher Checksum -- Refer to RFC1008. */ | |
718e3744 | 176 | |
6a270cd9 JD |
177 | /* All the offsets are zero-based. The offsets in the RFC1008 are |
178 | one-based. */ | |
718e3744 | 179 | u_int16_t |
180 | ospf_lsa_checksum (struct lsa_header *lsa) | |
181 | { | |
6a270cd9 JD |
182 | u_char *buffer = (u_char *) &lsa->options; |
183 | int options_offset = buffer - (u_char *) &lsa->ls_age; /* should be 2 */ | |
718e3744 | 184 | |
6a270cd9 JD |
185 | /* Skip the AGE field */ |
186 | u_int16_t len = ntohs(lsa->length) - options_offset; | |
718e3744 | 187 | |
6a270cd9 JD |
188 | /* Checksum offset starts from "options" field, not the beginning of the |
189 | lsa_header struct. The offset is 14, rather than 16. */ | |
190 | int checksum_offset = (u_char *) &lsa->checksum - buffer; | |
718e3744 | 191 | |
6a270cd9 | 192 | return fletcher_checksum(buffer, len, checksum_offset); |
718e3744 | 193 | } |
194 | ||
195 | ||
196 | \f | |
197 | /* Create OSPF LSA. */ | |
198 | struct ospf_lsa * | |
199 | ospf_lsa_new () | |
200 | { | |
201 | struct ospf_lsa *new; | |
202 | ||
203 | new = XCALLOC (MTYPE_OSPF_LSA, sizeof (struct ospf_lsa)); | |
718e3744 | 204 | |
205 | new->flags = 0; | |
206 | new->lock = 1; | |
207 | new->retransmit_counter = 0; | |
2518efd1 | 208 | new->tv_recv = recent_relative_time (); |
718e3744 | 209 | new->tv_orig = new->tv_recv; |
210 | new->refresh_list = -1; | |
211 | ||
212 | return new; | |
213 | } | |
214 | ||
215 | /* Duplicate OSPF LSA. */ | |
216 | struct ospf_lsa * | |
217 | ospf_lsa_dup (struct ospf_lsa *lsa) | |
218 | { | |
219 | struct ospf_lsa *new; | |
220 | ||
221 | if (lsa == NULL) | |
222 | return NULL; | |
223 | ||
224 | new = XCALLOC (MTYPE_OSPF_LSA, sizeof (struct ospf_lsa)); | |
225 | ||
226 | memcpy (new, lsa, sizeof (struct ospf_lsa)); | |
227 | UNSET_FLAG (new->flags, OSPF_LSA_DISCARD); | |
228 | new->lock = 1; | |
229 | new->retransmit_counter = 0; | |
230 | new->data = ospf_lsa_data_dup (lsa->data); | |
231 | ||
f2c80652 | 232 | /* kevinm: Clear the refresh_list, otherwise there are going |
233 | to be problems when we try to remove the LSA from the | |
234 | queue (which it's not a member of.) | |
235 | XXX: Should we add the LSA to the refresh_list queue? */ | |
236 | new->refresh_list = -1; | |
237 | ||
238 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 239 | zlog_debug ("LSA: duplicated %p (new: %p)", lsa, new); |
f2c80652 | 240 | |
718e3744 | 241 | return new; |
242 | } | |
243 | ||
244 | /* Free OSPF LSA. */ | |
245 | void | |
246 | ospf_lsa_free (struct ospf_lsa *lsa) | |
247 | { | |
248 | assert (lsa->lock == 0); | |
249 | ||
250 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 251 | zlog_debug ("LSA: freed %p", lsa); |
718e3744 | 252 | |
253 | /* Delete LSA data. */ | |
254 | if (lsa->data != NULL) | |
255 | ospf_lsa_data_free (lsa->data); | |
256 | ||
257 | assert (lsa->refresh_list < 0); | |
258 | ||
259 | memset (lsa, 0, sizeof (struct ospf_lsa)); | |
260 | XFREE (MTYPE_OSPF_LSA, lsa); | |
261 | } | |
262 | ||
263 | /* Lock LSA. */ | |
264 | struct ospf_lsa * | |
265 | ospf_lsa_lock (struct ospf_lsa *lsa) | |
266 | { | |
267 | lsa->lock++; | |
268 | return lsa; | |
269 | } | |
270 | ||
271 | /* Unlock LSA. */ | |
272 | void | |
1fe6ed38 | 273 | ospf_lsa_unlock (struct ospf_lsa **lsa) |
718e3744 | 274 | { |
275 | /* This is sanity check. */ | |
1fe6ed38 | 276 | if (!lsa || !*lsa) |
718e3744 | 277 | return; |
278 | ||
1fe6ed38 | 279 | (*lsa)->lock--; |
718e3744 | 280 | |
1fe6ed38 | 281 | assert ((*lsa)->lock >= 0); |
718e3744 | 282 | |
1fe6ed38 | 283 | if ((*lsa)->lock == 0) |
718e3744 | 284 | { |
1fe6ed38 PJ |
285 | assert (CHECK_FLAG ((*lsa)->flags, OSPF_LSA_DISCARD)); |
286 | ospf_lsa_free (*lsa); | |
287 | *lsa = NULL; | |
718e3744 | 288 | } |
289 | } | |
290 | ||
291 | /* Check discard flag. */ | |
292 | void | |
293 | ospf_lsa_discard (struct ospf_lsa *lsa) | |
294 | { | |
295 | if (!CHECK_FLAG (lsa->flags, OSPF_LSA_DISCARD)) | |
296 | { | |
297 | SET_FLAG (lsa->flags, OSPF_LSA_DISCARD); | |
1fe6ed38 | 298 | ospf_lsa_unlock (&lsa); |
718e3744 | 299 | } |
300 | } | |
301 | ||
302 | /* Create LSA data. */ | |
303 | struct lsa_header * | |
304 | ospf_lsa_data_new (size_t size) | |
305 | { | |
393deb9b | 306 | return XCALLOC (MTYPE_OSPF_LSA_DATA, size); |
718e3744 | 307 | } |
308 | ||
309 | /* Duplicate LSA data. */ | |
310 | struct lsa_header * | |
311 | ospf_lsa_data_dup (struct lsa_header *lsah) | |
312 | { | |
313 | struct lsa_header *new; | |
314 | ||
315 | new = ospf_lsa_data_new (ntohs (lsah->length)); | |
316 | memcpy (new, lsah, ntohs (lsah->length)); | |
317 | ||
318 | return new; | |
319 | } | |
320 | ||
321 | /* Free LSA data. */ | |
322 | void | |
323 | ospf_lsa_data_free (struct lsa_header *lsah) | |
324 | { | |
325 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 326 | zlog_debug ("LSA[Type%d:%s]: data freed %p", |
718e3744 | 327 | lsah->type, inet_ntoa (lsah->id), lsah); |
328 | ||
329 | XFREE (MTYPE_OSPF_LSA_DATA, lsah); | |
330 | } | |
331 | ||
332 | \f | |
333 | /* LSA general functions. */ | |
334 | ||
335 | const char * | |
336 | dump_lsa_key (struct ospf_lsa *lsa) | |
337 | { | |
338 | static char buf[] = { | |
52dc7ee6 | 339 | "Type255,id(255.255.255.255),ar(255.255.255.255)" |
718e3744 | 340 | }; |
341 | struct lsa_header *lsah; | |
342 | ||
343 | if (lsa != NULL && (lsah = lsa->data) != NULL) | |
344 | { | |
345 | char id[INET_ADDRSTRLEN], ar[INET_ADDRSTRLEN]; | |
346 | strcpy (id, inet_ntoa (lsah->id)); | |
347 | strcpy (ar, inet_ntoa (lsah->adv_router)); | |
348 | ||
349 | sprintf (buf, "Type%d,id(%s),ar(%s)", lsah->type, id, ar); | |
350 | } | |
351 | else | |
352 | strcpy (buf, "NULL"); | |
353 | ||
354 | return buf; | |
355 | } | |
356 | ||
357 | u_int32_t | |
358 | lsa_seqnum_increment (struct ospf_lsa *lsa) | |
359 | { | |
360 | u_int32_t seqnum; | |
361 | ||
362 | seqnum = ntohl (lsa->data->ls_seqnum) + 1; | |
363 | ||
364 | return htonl (seqnum); | |
365 | } | |
366 | ||
367 | void | |
368 | lsa_header_set (struct stream *s, u_char options, | |
68980084 | 369 | u_char type, struct in_addr id, struct in_addr router_id) |
718e3744 | 370 | { |
371 | struct lsa_header *lsah; | |
372 | ||
373 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
374 | ||
375 | lsah->ls_age = htons (0); | |
376 | lsah->options = options; | |
377 | lsah->type = type; | |
378 | lsah->id = id; | |
68980084 | 379 | lsah->adv_router = router_id; |
718e3744 | 380 | lsah->ls_seqnum = htonl (OSPF_INITIAL_SEQUENCE_NUMBER); |
381 | ||
9985f83c | 382 | stream_forward_endp (s, OSPF_LSA_HEADER_SIZE); |
718e3744 | 383 | } |
384 | \f | |
68980084 | 385 | |
718e3744 | 386 | /* router-LSA related functions. */ |
387 | /* Get router-LSA flags. */ | |
4dadc291 | 388 | static u_char |
718e3744 | 389 | router_lsa_flags (struct ospf_area *area) |
390 | { | |
391 | u_char flags; | |
392 | ||
68980084 | 393 | flags = area->ospf->flags; |
718e3744 | 394 | |
395 | /* Set virtual link flag. */ | |
396 | if (ospf_full_virtual_nbrs (area)) | |
397 | SET_FLAG (flags, ROUTER_LSA_VIRTUAL); | |
398 | else | |
399 | /* Just sanity check */ | |
400 | UNSET_FLAG (flags, ROUTER_LSA_VIRTUAL); | |
401 | ||
402 | /* Set Shortcut ABR behabiour flag. */ | |
403 | UNSET_FLAG (flags, ROUTER_LSA_SHORTCUT); | |
68980084 | 404 | if (area->ospf->abr_type == OSPF_ABR_SHORTCUT) |
718e3744 | 405 | if (!OSPF_IS_AREA_BACKBONE (area)) |
406 | if ((area->shortcut_configured == OSPF_SHORTCUT_DEFAULT && | |
68980084 | 407 | area->ospf->backbone == NULL) || |
718e3744 | 408 | area->shortcut_configured == OSPF_SHORTCUT_ENABLE) |
409 | SET_FLAG (flags, ROUTER_LSA_SHORTCUT); | |
410 | ||
411 | /* ASBR can't exit in stub area. */ | |
fc787e87 | 412 | if (area->external_routing == OSPF_AREA_STUB) |
942b6c19 | 413 | UNSET_FLAG (flags, ROUTER_LSA_EXTERNAL); |
414 | /* If ASBR set External flag */ | |
415 | else if (IS_OSPF_ASBR (area->ospf)) | |
416 | SET_FLAG (flags, ROUTER_LSA_EXTERNAL); | |
417 | ||
418 | /* Set ABR dependent flags */ | |
419 | if (IS_OSPF_ABR (area->ospf)) | |
420 | { | |
421 | SET_FLAG (flags, ROUTER_LSA_BORDER); | |
942b6c19 | 422 | /* If Area is NSSA and we are both ABR and unconditional translator, |
d4a53d58 | 423 | * set Nt bit to inform other routers. |
942b6c19 | 424 | */ |
d4a53d58 | 425 | if ( (area->external_routing == OSPF_AREA_NSSA) |
426 | && (area->NSSATranslatorRole == OSPF_NSSA_ROLE_ALWAYS)) | |
427 | SET_FLAG (flags, ROUTER_LSA_NT); | |
942b6c19 | 428 | } |
718e3744 | 429 | return flags; |
430 | } | |
431 | ||
432 | /* Lookup neighbor other than myself. | |
433 | And check neighbor count, | |
434 | Point-to-Point link must have only 1 neighbor. */ | |
435 | struct ospf_neighbor * | |
68980084 | 436 | ospf_nbr_lookup_ptop (struct ospf_interface *oi) |
718e3744 | 437 | { |
718e3744 | 438 | struct ospf_neighbor *nbr = NULL; |
68980084 | 439 | struct route_node *rn; |
718e3744 | 440 | |
441 | /* Search neighbor, there must be one of two nbrs. */ | |
68980084 | 442 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) |
443 | if ((nbr = rn->info)) | |
444 | if (!IPV4_ADDR_SAME (&nbr->router_id, &oi->ospf->router_id)) | |
718e3744 | 445 | if (nbr->state == NSM_Full) |
68980084 | 446 | { |
447 | route_unlock_node (rn); | |
448 | break; | |
449 | } | |
718e3744 | 450 | |
451 | /* PtoP link must have only 1 neighbor. */ | |
68980084 | 452 | if (ospf_nbr_count (oi, 0) > 1) |
718e3744 | 453 | zlog_warn ("Point-to-Point link has more than 1 neighobrs."); |
454 | ||
455 | return nbr; | |
456 | } | |
457 | ||
88d6cf37 | 458 | /* Determine cost of link, taking RFC3137 stub-router support into |
459 | * consideration | |
460 | */ | |
461 | static u_int16_t | |
462 | ospf_link_cost (struct ospf_interface *oi) | |
463 | { | |
464 | /* RFC3137 stub router support */ | |
465 | if (!CHECK_FLAG (oi->area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED)) | |
466 | return oi->output_cost; | |
467 | else | |
468 | return OSPF_OUTPUT_COST_INFINITE; | |
469 | } | |
470 | ||
718e3744 | 471 | /* Set a link information. */ |
779adb01 | 472 | static char |
718e3744 | 473 | link_info_set (struct stream *s, struct in_addr id, |
474 | struct in_addr data, u_char type, u_char tos, u_int16_t cost) | |
475 | { | |
779adb01 | 476 | /* LSA stream is initially allocated to OSPF_MAX_LSA_SIZE, suits |
477 | * vast majority of cases. Some rare routers with lots of links need more. | |
478 | * we try accomodate those here. | |
479 | */ | |
480 | if (STREAM_WRITEABLE(s) < OSPF_ROUTER_LSA_LINK_SIZE) | |
481 | { | |
482 | size_t ret = OSPF_MAX_LSA_SIZE; | |
483 | ||
484 | /* Can we enlarge the stream still? */ | |
485 | if (STREAM_SIZE(s) == OSPF_MAX_LSA_SIZE) | |
486 | { | |
487 | /* we futz the size here for simplicity, really we need to account | |
488 | * for just: | |
489 | * IP Header - (sizeof (struct ip)) | |
490 | * OSPF Header - OSPF_HEADER_SIZE | |
491 | * LSA Header - OSPF_LSA_HEADER_SIZE | |
492 | * MD5 auth data, if MD5 is configured - OSPF_AUTH_MD5_SIZE. | |
493 | * | |
494 | * Simpler just to subtract OSPF_MAX_LSA_SIZE though. | |
495 | */ | |
496 | ret = stream_resize (s, OSPF_MAX_PACKET_SIZE - OSPF_MAX_LSA_SIZE); | |
497 | } | |
498 | ||
499 | if (ret == OSPF_MAX_LSA_SIZE) | |
500 | { | |
5372510d | 501 | zlog_warn ("%s: Out of space in LSA stream, left %zd, size %zd", |
779adb01 | 502 | __func__, STREAM_REMAIN (s), STREAM_SIZE (s)); |
503 | return 0; | |
504 | } | |
505 | } | |
506 | ||
718e3744 | 507 | /* TOS based routing is not supported. */ |
508 | stream_put_ipv4 (s, id.s_addr); /* Link ID. */ | |
509 | stream_put_ipv4 (s, data.s_addr); /* Link Data. */ | |
510 | stream_putc (s, type); /* Link Type. */ | |
511 | stream_putc (s, tos); /* TOS = 0. */ | |
512 | stream_putw (s, cost); /* Link Cost. */ | |
779adb01 | 513 | |
514 | return 1; | |
718e3744 | 515 | } |
516 | ||
e4529636 | 517 | /* Describe Point-to-Point link (Section 12.4.1.1). */ |
4dadc291 | 518 | static int |
718e3744 | 519 | lsa_link_ptop_set (struct stream *s, struct ospf_interface *oi) |
520 | { | |
521 | int links = 0; | |
522 | struct ospf_neighbor *nbr; | |
523 | struct in_addr id, mask; | |
88d6cf37 | 524 | u_int16_t cost = ospf_link_cost (oi); |
718e3744 | 525 | |
526 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 527 | zlog_debug ("LSA[Type1]: Set link Point-to-Point"); |
718e3744 | 528 | |
68980084 | 529 | if ((nbr = ospf_nbr_lookup_ptop (oi))) |
718e3744 | 530 | if (nbr->state == NSM_Full) |
531 | { | |
532 | /* For unnumbered point-to-point networks, the Link Data field | |
533 | should specify the interface's MIB-II ifIndex value. */ | |
779adb01 | 534 | links += link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
535 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
718e3744 | 536 | } |
537 | ||
e4529636 AS |
538 | /* Regardless of the state of the neighboring router, we must |
539 | add a Type 3 link (stub network). | |
540 | N.B. Options 1 & 2 share basically the same logic. */ | |
541 | masklen2ip (oi->address->prefixlen, &mask); | |
542 | id.s_addr = CONNECTED_PREFIX(oi->connected)->u.prefix4.s_addr & mask.s_addr; | |
543 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, | |
544 | oi->output_cost); | |
718e3744 | 545 | return links; |
546 | } | |
547 | ||
548 | /* Describe Broadcast Link. */ | |
4dadc291 | 549 | static int |
718e3744 | 550 | lsa_link_broadcast_set (struct stream *s, struct ospf_interface *oi) |
551 | { | |
552 | struct ospf_neighbor *dr; | |
553 | struct in_addr id, mask; | |
88d6cf37 | 554 | u_int16_t cost = ospf_link_cost (oi); |
555 | ||
718e3744 | 556 | /* Describe Type 3 Link. */ |
557 | if (oi->state == ISM_Waiting) | |
558 | { | |
559 | masklen2ip (oi->address->prefixlen, &mask); | |
560 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 561 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
562 | oi->output_cost); | |
718e3744 | 563 | } |
564 | ||
565 | dr = ospf_nbr_lookup_by_addr (oi->nbrs, &DR (oi)); | |
566 | /* Describe Type 2 link. */ | |
567 | if (dr && (dr->state == NSM_Full || | |
568 | IPV4_ADDR_SAME (&oi->address->u.prefix4, &DR (oi))) && | |
68980084 | 569 | ospf_nbr_count (oi, NSM_Full) > 0) |
718e3744 | 570 | { |
779adb01 | 571 | return link_info_set (s, DR (oi), oi->address->u.prefix4, |
572 | LSA_LINK_TYPE_TRANSIT, 0, cost); | |
718e3744 | 573 | } |
574 | /* Describe type 3 link. */ | |
575 | else | |
576 | { | |
577 | masklen2ip (oi->address->prefixlen, &mask); | |
578 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 579 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
580 | oi->output_cost); | |
718e3744 | 581 | } |
718e3744 | 582 | } |
583 | ||
4dadc291 | 584 | static int |
718e3744 | 585 | lsa_link_loopback_set (struct stream *s, struct ospf_interface *oi) |
586 | { | |
587 | struct in_addr id, mask; | |
88d6cf37 | 588 | |
718e3744 | 589 | /* Describe Type 3 Link. */ |
590 | if (oi->state != ISM_Loopback) | |
591 | return 0; | |
592 | ||
593 | mask.s_addr = 0xffffffff; | |
594 | id.s_addr = oi->address->u.prefix4.s_addr; | |
779adb01 | 595 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, oi->output_cost); |
718e3744 | 596 | } |
597 | ||
598 | /* Describe Virtual Link. */ | |
4dadc291 | 599 | static int |
718e3744 | 600 | lsa_link_virtuallink_set (struct stream *s, struct ospf_interface *oi) |
601 | { | |
602 | struct ospf_neighbor *nbr; | |
88d6cf37 | 603 | u_int16_t cost = ospf_link_cost (oi); |
718e3744 | 604 | |
718e3744 | 605 | if (oi->state == ISM_PointToPoint) |
68980084 | 606 | if ((nbr = ospf_nbr_lookup_ptop (oi))) |
718e3744 | 607 | if (nbr->state == NSM_Full) |
608 | { | |
779adb01 | 609 | return link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
610 | LSA_LINK_TYPE_VIRTUALLINK, 0, cost); | |
718e3744 | 611 | } |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
616 | #define lsa_link_nbma_set(S,O) lsa_link_broadcast_set (S, O) | |
617 | ||
7afa08da | 618 | /* this function add for support point-to-multipoint ,see rfc2328 |
619 | 12.4.1.4.*/ | |
620 | /* from "edward rrr" <edward_rrr@hotmail.com> | |
621 | http://marc.theaimsgroup.com/?l=zebra&m=100739222210507&w=2 */ | |
4dadc291 | 622 | static int |
68980084 | 623 | lsa_link_ptomp_set (struct stream *s, struct ospf_interface *oi) |
7afa08da | 624 | { |
625 | int links = 0; | |
626 | struct route_node *rn; | |
627 | struct ospf_neighbor *nbr = NULL; | |
628 | struct in_addr id, mask; | |
88d6cf37 | 629 | u_int16_t cost = ospf_link_cost (oi); |
7afa08da | 630 | |
631 | mask.s_addr = 0xffffffff; | |
632 | id.s_addr = oi->address->u.prefix4.s_addr; | |
779adb01 | 633 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); |
7afa08da | 634 | |
1cc8f762 | 635 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 636 | zlog_debug ("PointToMultipoint: running ptomultip_set"); |
7afa08da | 637 | |
638 | /* Search neighbor, */ | |
639 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
640 | if ((nbr = rn->info) != NULL) | |
641 | /* Ignore myself. */ | |
68980084 | 642 | if (!IPV4_ADDR_SAME (&nbr->router_id, &oi->ospf->router_id)) |
7afa08da | 643 | if (nbr->state == NSM_Full) |
644 | ||
645 | { | |
779adb01 | 646 | links += link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
647 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
1cc8f762 | 648 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 649 | zlog_debug ("PointToMultipoint: set link to %s", |
1cc8f762 | 650 | inet_ntoa(oi->address->u.prefix4)); |
7afa08da | 651 | } |
652 | ||
653 | return links; | |
7afa08da | 654 | } |
655 | ||
718e3744 | 656 | /* Set router-LSA link information. */ |
4dadc291 | 657 | static int |
718e3744 | 658 | router_lsa_link_set (struct stream *s, struct ospf_area *area) |
659 | { | |
52dc7ee6 | 660 | struct listnode *node; |
1eb8ef25 | 661 | struct ospf_interface *oi; |
718e3744 | 662 | int links = 0; |
663 | ||
1eb8ef25 | 664 | for (ALL_LIST_ELEMENTS_RO (area->oiflist, node, oi)) |
718e3744 | 665 | { |
718e3744 | 666 | struct interface *ifp = oi->ifp; |
667 | ||
668 | /* Check interface is up, OSPF is enable. */ | |
2e3b2e47 | 669 | if (if_is_operative (ifp)) |
718e3744 | 670 | { |
671 | if (oi->state != ISM_Down) | |
672 | { | |
673 | /* Describe each link. */ | |
674 | switch (oi->type) | |
675 | { | |
676 | case OSPF_IFTYPE_POINTOPOINT: | |
677 | links += lsa_link_ptop_set (s, oi); | |
678 | break; | |
679 | case OSPF_IFTYPE_BROADCAST: | |
680 | links += lsa_link_broadcast_set (s, oi); | |
681 | break; | |
682 | case OSPF_IFTYPE_NBMA: | |
683 | links += lsa_link_nbma_set (s, oi); | |
684 | break; | |
685 | case OSPF_IFTYPE_POINTOMULTIPOINT: | |
68980084 | 686 | links += lsa_link_ptomp_set (s, oi); |
718e3744 | 687 | break; |
688 | case OSPF_IFTYPE_VIRTUALLINK: | |
689 | links += lsa_link_virtuallink_set (s, oi); | |
690 | break; | |
691 | case OSPF_IFTYPE_LOOPBACK: | |
692 | links += lsa_link_loopback_set (s, oi); | |
693 | } | |
694 | } | |
695 | } | |
696 | } | |
697 | ||
698 | return links; | |
699 | } | |
700 | ||
701 | /* Set router-LSA body. */ | |
4dadc291 | 702 | static void |
718e3744 | 703 | ospf_router_lsa_body_set (struct stream *s, struct ospf_area *area) |
704 | { | |
705 | unsigned long putp; | |
706 | u_int16_t cnt; | |
707 | ||
708 | /* Set flags. */ | |
709 | stream_putc (s, router_lsa_flags (area)); | |
710 | ||
711 | /* Set Zero fields. */ | |
712 | stream_putc (s, 0); | |
713 | ||
714 | /* Keep pointer to # links. */ | |
9985f83c | 715 | putp = stream_get_endp(s); |
718e3744 | 716 | |
717 | /* Forward word */ | |
718 | stream_putw(s, 0); | |
719 | ||
720 | /* Set all link information. */ | |
721 | cnt = router_lsa_link_set (s, area); | |
722 | ||
723 | /* Set # of links here. */ | |
724 | stream_putw_at (s, putp, cnt); | |
725 | } | |
88d6cf37 | 726 | \f |
727 | static int | |
728 | ospf_stub_router_timer (struct thread *t) | |
729 | { | |
730 | struct ospf_area *area = THREAD_ARG (t); | |
731 | ||
732 | area->t_stub_router = NULL; | |
733 | ||
734 | SET_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
735 | ||
736 | /* clear stub route state and generate router-lsa refresh, don't | |
737 | * clobber an administratively set stub-router state though. | |
738 | */ | |
739 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
740 | return 0; | |
741 | ||
742 | UNSET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
743 | ||
744 | ospf_router_lsa_timer_add (area); | |
745 | ||
746 | return 0; | |
747 | } | |
718e3744 | 748 | |
88d6cf37 | 749 | inline static void |
750 | ospf_stub_router_check (struct ospf_area *area) | |
751 | { | |
752 | /* area must either be administratively configured to be stub | |
753 | * or startup-time stub-router must be configured and we must in a pre-stub | |
754 | * state. | |
755 | */ | |
756 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
757 | { | |
758 | SET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
759 | return; | |
760 | } | |
761 | ||
762 | /* not admin-stubbed, check whether startup stubbing is configured and | |
763 | * whether it's not been done yet | |
764 | */ | |
765 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED)) | |
766 | return; | |
767 | ||
768 | if (area->ospf->stub_router_startup_time == OSPF_STUB_ROUTER_UNCONFIGURED) | |
769 | { | |
770 | /* stub-router is hence done forever for this area, even if someone | |
771 | * tries configure it (take effect next restart). | |
772 | */ | |
773 | SET_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
774 | return; | |
775 | } | |
776 | ||
777 | /* startup stub-router configured and not yet done */ | |
778 | SET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
779 | ||
780 | OSPF_AREA_TIMER_ON (area->t_stub_router, ospf_stub_router_timer, | |
781 | area->ospf->stub_router_startup_time); | |
782 | } | |
783 | \f | |
718e3744 | 784 | /* Create new router-LSA. */ |
4dadc291 | 785 | static struct ospf_lsa * |
718e3744 | 786 | ospf_router_lsa_new (struct ospf_area *area) |
787 | { | |
68980084 | 788 | struct ospf *ospf = area->ospf; |
718e3744 | 789 | struct stream *s; |
790 | struct lsa_header *lsah; | |
791 | struct ospf_lsa *new; | |
792 | int length; | |
793 | ||
794 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 795 | zlog_debug ("LSA[Type1]: Create router-LSA instance"); |
718e3744 | 796 | |
88d6cf37 | 797 | /* check whether stub-router is desired, and if this is the first |
798 | * router LSA. | |
799 | */ | |
800 | ospf_stub_router_check (area); | |
801 | ||
718e3744 | 802 | /* Create a stream for LSA. */ |
803 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
718e3744 | 804 | /* Set LSA common header fields. */ |
d4a53d58 | 805 | lsa_header_set (s, LSA_OPTIONS_GET (area) | LSA_OPTIONS_NSSA_GET (area), |
d4a53d58 | 806 | OSPF_ROUTER_LSA, ospf->router_id, ospf->router_id); |
718e3744 | 807 | |
808 | /* Set router-LSA body fields. */ | |
809 | ospf_router_lsa_body_set (s, area); | |
810 | ||
811 | /* Set length. */ | |
812 | length = stream_get_endp (s); | |
779adb01 | 813 | lsah = (struct lsa_header *) STREAM_DATA (s); |
718e3744 | 814 | lsah->length = htons (length); |
815 | ||
816 | /* Now, create OSPF LSA instance. */ | |
c24d602e | 817 | if ( (new = ospf_lsa_new ()) == NULL) |
818 | { | |
819 | zlog_err ("%s: Unable to create new lsa", __func__); | |
820 | return NULL; | |
821 | } | |
822 | ||
718e3744 | 823 | new->area = area; |
f6543138 | 824 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 825 | |
826 | /* Copy LSA data to store, discard stream. */ | |
827 | new->data = ospf_lsa_data_new (length); | |
828 | memcpy (new->data, lsah, length); | |
829 | stream_free (s); | |
830 | ||
831 | return new; | |
832 | } | |
833 | ||
834 | /* Originate Router-LSA. */ | |
88d6cf37 | 835 | static struct ospf_lsa * |
718e3744 | 836 | ospf_router_lsa_originate (struct ospf_area *area) |
837 | { | |
838 | struct ospf_lsa *new; | |
88d6cf37 | 839 | |
718e3744 | 840 | /* Create new router-LSA instance. */ |
c24d602e | 841 | if ( (new = ospf_router_lsa_new (area)) == NULL) |
842 | { | |
843 | zlog_err ("%s: ospf_router_lsa_new returned NULL", __func__); | |
844 | return NULL; | |
845 | } | |
718e3744 | 846 | |
847 | /* Sanity check. */ | |
848 | if (new->data->adv_router.s_addr == 0) | |
849 | { | |
850 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 851 | zlog_debug ("LSA[Type1]: AdvRouter is 0, discard"); |
718e3744 | 852 | ospf_lsa_discard (new); |
853 | return NULL; | |
854 | } | |
855 | ||
856 | /* Install LSA to LSDB. */ | |
68980084 | 857 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 858 | |
859 | /* Update LSA origination count. */ | |
68980084 | 860 | area->ospf->lsa_originate_count++; |
718e3744 | 861 | |
862 | /* Flooding new LSA through area. */ | |
863 | ospf_flood_through_area (area, NULL, new); | |
864 | ||
865 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
866 | { | |
e588f21f | 867 | zlog_debug ("LSA[Type%d:%s]: Originate router-LSA %p", |
718e3744 | 868 | new->data->type, inet_ntoa (new->data->id), new); |
869 | ospf_lsa_header_dump (new->data); | |
870 | } | |
871 | ||
872 | return new; | |
873 | } | |
874 | ||
875 | /* Refresh router-LSA. */ | |
4dadc291 | 876 | static struct ospf_lsa * |
718e3744 | 877 | ospf_router_lsa_refresh (struct ospf_lsa *lsa) |
878 | { | |
879 | struct ospf_area *area = lsa->area; | |
880 | struct ospf_lsa *new; | |
881 | ||
882 | /* Sanity check. */ | |
883 | assert (lsa->data); | |
884 | ||
885 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 886 | ospf_ls_retransmit_delete_nbr_area (area, lsa); |
718e3744 | 887 | |
888 | /* Create new router-LSA instance. */ | |
c24d602e | 889 | if ( (new = ospf_router_lsa_new (area)) == NULL) |
890 | { | |
891 | zlog_err ("%s: ospf_router_lsa_new returned NULL", __func__); | |
892 | return NULL; | |
893 | } | |
894 | ||
718e3744 | 895 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); |
896 | ||
68980084 | 897 | ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 898 | |
899 | /* Flood LSA through area. */ | |
900 | ospf_flood_through_area (area, NULL, new); | |
901 | ||
902 | /* Debug logging. */ | |
903 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
904 | { | |
e588f21f | 905 | zlog_debug ("LSA[Type%d:%s]: router-LSA refresh", |
718e3744 | 906 | new->data->type, inet_ntoa (new->data->id)); |
907 | ospf_lsa_header_dump (new->data); | |
908 | } | |
909 | ||
910 | return NULL; | |
911 | } | |
912 | ||
4dadc291 | 913 | static int |
718e3744 | 914 | ospf_router_lsa_timer (struct thread *t) |
915 | { | |
916 | struct ospf_area *area; | |
917 | ||
918 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 919 | zlog_debug ("Timer[router-LSA]: (router-LSA Refresh expire)"); |
718e3744 | 920 | |
921 | area = THREAD_ARG (t); | |
922 | area->t_router_lsa_self = NULL; | |
923 | ||
924 | /* Now refresh router-LSA. */ | |
925 | if (area->router_lsa_self) | |
926 | ospf_router_lsa_refresh (area->router_lsa_self); | |
927 | /* Newly originate router-LSA. */ | |
928 | else | |
929 | ospf_router_lsa_originate (area); | |
930 | ||
931 | return 0; | |
932 | } | |
933 | ||
934 | void | |
935 | ospf_router_lsa_timer_add (struct ospf_area *area) | |
936 | { | |
937 | /* Keep area's self-originated router-LSA. */ | |
938 | struct ospf_lsa *lsa = area->router_lsa_self; | |
939 | ||
940 | /* Cancel previously scheduled router-LSA timer. */ | |
941 | if (area->t_router_lsa_self) | |
942 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 943 | zlog_debug ("LSA[Type1]: Cancel previous router-LSA timer"); |
718e3744 | 944 | |
945 | OSPF_TIMER_OFF (area->t_router_lsa_self); | |
946 | ||
947 | /* If router-LSA is originated previously, check the interval time. */ | |
948 | if (lsa) | |
949 | { | |
950 | int delay; | |
951 | if ((delay = ospf_lsa_refresh_delay (lsa)) > 0) | |
952 | { | |
953 | OSPF_AREA_TIMER_ON (area->t_router_lsa_self, | |
954 | ospf_router_lsa_timer, delay); | |
955 | return; | |
956 | } | |
957 | } | |
958 | ||
959 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 960 | zlog_debug ("LSA[Type1]: Scheduling router-LSA origination right away"); |
718e3744 | 961 | |
962 | /* Immediately refresh router-LSA. */ | |
963 | OSPF_AREA_TIMER_ON (area->t_router_lsa_self, ospf_router_lsa_timer, 0); | |
964 | } | |
965 | ||
966 | int | |
68980084 | 967 | ospf_router_lsa_update_timer (struct thread *thread) |
718e3744 | 968 | { |
68980084 | 969 | struct ospf *ospf = THREAD_ARG (thread); |
1eb8ef25 | 970 | struct listnode *node, *nnode; |
971 | struct ospf_area *area; | |
718e3744 | 972 | |
973 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 974 | zlog_debug ("Timer[router-LSA Update]: (timer expire)"); |
718e3744 | 975 | |
68980084 | 976 | ospf->t_router_lsa_update = NULL; |
718e3744 | 977 | |
1eb8ef25 | 978 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 979 | { |
718e3744 | 980 | struct ospf_lsa *lsa = area->router_lsa_self; |
981 | struct router_lsa *rl; | |
eb1ce605 | 982 | const char *area_str; |
718e3744 | 983 | |
984 | /* Keep Area ID string. */ | |
985 | area_str = AREA_NAME (area); | |
986 | ||
987 | /* If LSA not exist in this Area, originate new. */ | |
988 | if (lsa == NULL) | |
989 | { | |
990 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 991 | zlog_debug("LSA[Type1]: Create router-LSA for Area %s", area_str); |
718e3744 | 992 | |
993 | ospf_router_lsa_originate (area); | |
994 | } | |
995 | /* If router-ID is changed, Link ID must change. | |
996 | First flush old LSA, then originate new. */ | |
68980084 | 997 | else if (!IPV4_ADDR_SAME (&lsa->data->id, &ospf->router_id)) |
718e3744 | 998 | { |
999 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1000 | zlog_debug("LSA[Type%d:%s]: Refresh router-LSA for Area %s", |
718e3744 | 1001 | lsa->data->type, inet_ntoa (lsa->data->id), area_str); |
1002 | ospf_lsa_flush_area (lsa, area); | |
1fe6ed38 | 1003 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 1004 | area->router_lsa_self = NULL; |
1005 | ||
1006 | /* Refresh router-LSA, (not install) and flood through area. */ | |
1007 | ospf_router_lsa_timer_add (area); | |
1008 | } | |
1009 | else | |
1010 | { | |
1011 | rl = (struct router_lsa *) lsa->data; | |
1012 | /* Refresh router-LSA, (not install) and flood through area. */ | |
68980084 | 1013 | if (rl->flags != ospf->flags) |
718e3744 | 1014 | ospf_router_lsa_timer_add (area); |
1015 | } | |
1016 | } | |
1017 | ||
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | \f | |
1022 | /* network-LSA related functions. */ | |
1023 | /* Originate Network-LSA. */ | |
4dadc291 | 1024 | static void |
718e3744 | 1025 | ospf_network_lsa_body_set (struct stream *s, struct ospf_interface *oi) |
1026 | { | |
1027 | struct in_addr mask; | |
1028 | struct route_node *rn; | |
1029 | struct ospf_neighbor *nbr; | |
1030 | ||
1031 | masklen2ip (oi->address->prefixlen, &mask); | |
1032 | stream_put_ipv4 (s, mask.s_addr); | |
1033 | ||
1034 | /* The network-LSA lists those routers that are fully adjacent to | |
1035 | the Designated Router; each fully adjacent router is identified by | |
1036 | its OSPF Router ID. The Designated Router includes itself in this | |
1037 | list. RFC2328, Section 12.4.2 */ | |
1038 | ||
1039 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
1040 | if ((nbr = rn->info) != NULL) | |
1041 | if (nbr->state == NSM_Full || nbr == oi->nbr_self) | |
1042 | stream_put_ipv4 (s, nbr->router_id.s_addr); | |
1043 | } | |
1044 | ||
4dadc291 | 1045 | static struct ospf_lsa * |
718e3744 | 1046 | ospf_network_lsa_new (struct ospf_interface *oi) |
1047 | { | |
1048 | struct stream *s; | |
1049 | struct ospf_lsa *new; | |
1050 | struct lsa_header *lsah; | |
1051 | int length; | |
1052 | ||
1053 | /* If there are no neighbours on this network (the net is stub), | |
1054 | the router does not originate network-LSA (see RFC 12.4.2) */ | |
1055 | if (oi->full_nbrs == 0) | |
1056 | return NULL; | |
1057 | ||
1058 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1059 | zlog_debug ("LSA[Type2]: Create network-LSA instance"); |
718e3744 | 1060 | |
1061 | /* Create new stream for LSA. */ | |
1062 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1063 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1064 | ||
1065 | lsa_header_set (s, (OPTIONS (oi) | LSA_OPTIONS_GET (oi->area)), | |
68980084 | 1066 | OSPF_NETWORK_LSA, DR (oi), oi->ospf->router_id); |
718e3744 | 1067 | |
1068 | /* Set network-LSA body fields. */ | |
1069 | ospf_network_lsa_body_set (s, oi); | |
1070 | ||
1071 | /* Set length. */ | |
1072 | length = stream_get_endp (s); | |
1073 | lsah->length = htons (length); | |
1074 | ||
1075 | /* Create OSPF LSA instance. */ | |
c24d602e | 1076 | if ( (new = ospf_lsa_new ()) == NULL) |
1077 | { | |
1078 | zlog_err ("%s: ospf_lsa_new returned NULL", __func__); | |
1079 | return NULL; | |
1080 | } | |
1081 | ||
718e3744 | 1082 | new->area = oi->area; |
f6543138 | 1083 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1084 | |
1085 | /* Copy LSA to store. */ | |
1086 | new->data = ospf_lsa_data_new (length); | |
1087 | memcpy (new->data, lsah, length); | |
1088 | stream_free (s); | |
1089 | ||
1090 | return new; | |
1091 | } | |
1092 | ||
1093 | /* Originate network-LSA. */ | |
4dadc291 | 1094 | static struct ospf_lsa * |
718e3744 | 1095 | ospf_network_lsa_originate (struct ospf_interface *oi) |
1096 | { | |
1097 | struct ospf_lsa *new; | |
1098 | ||
1099 | /* Create new network-LSA instance. */ | |
1100 | new = ospf_network_lsa_new (oi); | |
1101 | if (new == NULL) | |
1102 | return NULL; | |
1103 | ||
1104 | /* Install LSA to LSDB. */ | |
68980084 | 1105 | new = ospf_lsa_install (oi->ospf, oi, new); |
718e3744 | 1106 | |
1107 | /* Update LSA origination count. */ | |
68980084 | 1108 | oi->ospf->lsa_originate_count++; |
718e3744 | 1109 | |
1110 | /* Flooding new LSA through area. */ | |
1111 | ospf_flood_through_area (oi->area, NULL, new); | |
1112 | ||
1113 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1114 | { | |
e588f21f | 1115 | zlog_debug ("LSA[Type%d:%s]: Originate network-LSA %p", |
718e3744 | 1116 | new->data->type, inet_ntoa (new->data->id), new); |
1117 | ospf_lsa_header_dump (new->data); | |
1118 | } | |
1119 | ||
1120 | return new; | |
1121 | } | |
1122 | ||
1123 | int | |
1124 | ospf_network_lsa_refresh (struct ospf_lsa *lsa, struct ospf_interface *oi) | |
1125 | { | |
1126 | struct ospf_area *area = lsa->area; | |
1127 | struct ospf_lsa *new; | |
1128 | ||
1129 | assert (lsa->data); | |
1130 | ||
1131 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 1132 | ospf_ls_retransmit_delete_nbr_area (area, lsa); |
718e3744 | 1133 | |
1134 | /* Create new network-LSA instance. */ | |
1135 | new = ospf_network_lsa_new (oi); | |
1136 | if (new == NULL) | |
1137 | return -1; | |
1138 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
1139 | ||
68980084 | 1140 | ospf_lsa_install (area->ospf, oi, new); |
718e3744 | 1141 | |
1142 | /* Flood LSA through aera. */ | |
1143 | ospf_flood_through_area (area, NULL, new); | |
1144 | ||
1145 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1146 | { | |
e588f21f | 1147 | zlog_debug ("LSA[Type%d:%s]: network-LSA refresh", |
718e3744 | 1148 | new->data->type, inet_ntoa (new->data->id)); |
1149 | ospf_lsa_header_dump (new->data); | |
1150 | } | |
1151 | ||
1152 | return 0; | |
1153 | } | |
1154 | ||
4dadc291 | 1155 | static int |
718e3744 | 1156 | ospf_network_lsa_refresh_timer (struct thread *t) |
1157 | { | |
1158 | struct ospf_interface *oi; | |
1159 | ||
1160 | oi = THREAD_ARG (t); | |
1161 | oi->t_network_lsa_self = NULL; | |
1162 | ||
1163 | if (oi->network_lsa_self) | |
1164 | /* Now refresh network-LSA. */ | |
1165 | ospf_network_lsa_refresh (oi->network_lsa_self, oi); | |
1166 | else | |
1167 | /* Newly create network-LSA. */ | |
1168 | ospf_network_lsa_originate (oi); | |
1169 | ||
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | void | |
1174 | ospf_network_lsa_timer_add (struct ospf_interface *oi) | |
1175 | { | |
1176 | /* Keep interface's self-originated network-LSA. */ | |
1177 | struct ospf_lsa *lsa = oi->network_lsa_self; | |
1178 | ||
1179 | /* Cancel previously schedules network-LSA timer. */ | |
1180 | if (oi->t_network_lsa_self) | |
1181 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1182 | zlog_debug ("LSA[Type2]: Cancel previous network-LSA timer"); |
718e3744 | 1183 | OSPF_TIMER_OFF (oi->t_network_lsa_self); |
1184 | ||
1185 | /* If network-LSA is originated previously, check the interval time. */ | |
1186 | if (lsa) | |
1187 | { | |
1188 | int delay; | |
1189 | if ((delay = ospf_lsa_refresh_delay (lsa)) > 0) | |
1190 | { | |
1191 | oi->t_network_lsa_self = | |
1192 | thread_add_timer (master, ospf_network_lsa_refresh_timer, | |
1193 | oi, delay); | |
1194 | return; | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1199 | zlog_debug ("Scheduling network-LSA origination right away"); |
718e3744 | 1200 | |
1201 | /* Immediately refresh network-LSA. */ | |
1202 | oi->t_network_lsa_self = | |
1203 | thread_add_event (master, ospf_network_lsa_refresh_timer, oi, 0); | |
1204 | } | |
1205 | ||
1206 | \f | |
4dadc291 | 1207 | static void |
718e3744 | 1208 | stream_put_ospf_metric (struct stream *s, u_int32_t metric_value) |
1209 | { | |
1210 | u_int32_t metric; | |
1211 | char *mp; | |
1212 | ||
1213 | /* Put 0 metric. TOS metric is not supported. */ | |
1214 | metric = htonl (metric_value); | |
1215 | mp = (char *) &metric; | |
1216 | mp++; | |
1217 | stream_put (s, mp, 3); | |
1218 | } | |
1219 | ||
1220 | /* summary-LSA related functions. */ | |
4dadc291 | 1221 | static void |
718e3744 | 1222 | ospf_summary_lsa_body_set (struct stream *s, struct prefix *p, |
1223 | u_int32_t metric) | |
1224 | { | |
1225 | struct in_addr mask; | |
1226 | ||
1227 | masklen2ip (p->prefixlen, &mask); | |
1228 | ||
1229 | /* Put Network Mask. */ | |
1230 | stream_put_ipv4 (s, mask.s_addr); | |
1231 | ||
1232 | /* Set # TOS. */ | |
1233 | stream_putc (s, (u_char) 0); | |
1234 | ||
1235 | /* Set metric. */ | |
1236 | stream_put_ospf_metric (s, metric); | |
1237 | } | |
1238 | ||
4dadc291 | 1239 | static struct ospf_lsa * |
718e3744 | 1240 | ospf_summary_lsa_new (struct ospf_area *area, struct prefix *p, |
1241 | u_int32_t metric, struct in_addr id) | |
1242 | { | |
1243 | struct stream *s; | |
1244 | struct ospf_lsa *new; | |
1245 | struct lsa_header *lsah; | |
1246 | int length; | |
1247 | ||
c24d602e | 1248 | if (id.s_addr == 0xffffffff) |
1249 | { | |
1250 | /* Maybe Link State ID not available. */ | |
1251 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1252 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1253 | OSPF_SUMMARY_LSA); | |
1254 | return NULL; | |
1255 | } | |
1256 | ||
718e3744 | 1257 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 1258 | zlog_debug ("LSA[Type3]: Create summary-LSA instance"); |
718e3744 | 1259 | |
1260 | /* Create new stream for LSA. */ | |
1261 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1262 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1263 | ||
68980084 | 1264 | lsa_header_set (s, LSA_OPTIONS_GET (area), OSPF_SUMMARY_LSA, |
1265 | id, area->ospf->router_id); | |
718e3744 | 1266 | |
1267 | /* Set summary-LSA body fields. */ | |
1268 | ospf_summary_lsa_body_set (s, p, metric); | |
1269 | ||
1270 | /* Set length. */ | |
1271 | length = stream_get_endp (s); | |
1272 | lsah->length = htons (length); | |
1273 | ||
1274 | /* Create OSPF LSA instance. */ | |
1275 | new = ospf_lsa_new (); | |
1276 | new->area = area; | |
f6543138 | 1277 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1278 | |
1279 | /* Copy LSA to store. */ | |
1280 | new->data = ospf_lsa_data_new (length); | |
1281 | memcpy (new->data, lsah, length); | |
1282 | stream_free (s); | |
1283 | ||
1284 | return new; | |
1285 | } | |
1286 | ||
1287 | /* Originate Summary-LSA. */ | |
1288 | struct ospf_lsa * | |
1289 | ospf_summary_lsa_originate (struct prefix_ipv4 *p, u_int32_t metric, | |
1290 | struct ospf_area *area) | |
1291 | { | |
1292 | struct ospf_lsa *new; | |
1293 | struct in_addr id; | |
1294 | ||
68980084 | 1295 | id = ospf_lsa_unique_id (area->ospf, area->lsdb, OSPF_SUMMARY_LSA, p); |
718e3744 | 1296 | |
c24d602e | 1297 | if (id.s_addr == 0xffffffff) |
1298 | { | |
1299 | /* Maybe Link State ID not available. */ | |
1300 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1301 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1302 | OSPF_SUMMARY_LSA); | |
1303 | return NULL; | |
1304 | } | |
1305 | ||
718e3744 | 1306 | /* Create new summary-LSA instance. */ |
c24d602e | 1307 | if ( !(new = ospf_summary_lsa_new (area, (struct prefix *) p, metric, id))) |
1308 | return NULL; | |
718e3744 | 1309 | |
1310 | /* Instlal LSA to LSDB. */ | |
68980084 | 1311 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 1312 | |
1313 | /* Update LSA origination count. */ | |
68980084 | 1314 | area->ospf->lsa_originate_count++; |
718e3744 | 1315 | |
1316 | /* Flooding new LSA through area. */ | |
1317 | ospf_flood_through_area (area, NULL, new); | |
1318 | ||
1319 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1320 | { | |
e588f21f | 1321 | zlog_debug ("LSA[Type%d:%s]: Originate summary-LSA %p", |
718e3744 | 1322 | new->data->type, inet_ntoa (new->data->id), new); |
1323 | ospf_lsa_header_dump (new->data); | |
1324 | } | |
1325 | ||
1326 | return new; | |
1327 | } | |
1328 | ||
1329 | struct ospf_lsa* | |
68980084 | 1330 | ospf_summary_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1331 | { |
1332 | struct ospf_lsa *new; | |
1333 | struct summary_lsa *sl; | |
1334 | struct prefix p; | |
1335 | ||
1336 | /* Sanity check. */ | |
1337 | assert (lsa->data); | |
1338 | ||
1339 | sl = (struct summary_lsa *)lsa->data; | |
1340 | p.prefixlen = ip_masklen (sl->mask); | |
1341 | new = ospf_summary_lsa_new (lsa->area, &p, GET_METRIC (sl->metric), | |
1342 | sl->header.id); | |
c24d602e | 1343 | |
1344 | if (!new) | |
1345 | return NULL; | |
1346 | ||
718e3744 | 1347 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); |
718e3744 | 1348 | |
68980084 | 1349 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 1350 | |
1351 | /* Flood LSA through AS. */ | |
1352 | ospf_flood_through_area (new->area, NULL, new); | |
1353 | ||
1354 | /* Debug logging. */ | |
1355 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1356 | { | |
e588f21f | 1357 | zlog_debug ("LSA[Type%d:%s]: summary-LSA refresh", |
718e3744 | 1358 | new->data->type, inet_ntoa (new->data->id)); |
1359 | ospf_lsa_header_dump (new->data); | |
1360 | } | |
1361 | ||
1362 | return new; | |
1363 | } | |
1364 | ||
1365 | \f | |
1366 | /* summary-ASBR-LSA related functions. */ | |
4dadc291 | 1367 | static void |
718e3744 | 1368 | ospf_summary_asbr_lsa_body_set (struct stream *s, struct prefix *p, |
1369 | u_int32_t metric) | |
1370 | { | |
1371 | struct in_addr mask; | |
1372 | ||
1373 | masklen2ip (p->prefixlen, &mask); | |
1374 | ||
1375 | /* Put Network Mask. */ | |
1376 | stream_put_ipv4 (s, mask.s_addr); | |
1377 | ||
1378 | /* Set # TOS. */ | |
1379 | stream_putc (s, (u_char) 0); | |
1380 | ||
1381 | /* Set metric. */ | |
1382 | stream_put_ospf_metric (s, metric); | |
1383 | } | |
1384 | ||
4dadc291 | 1385 | static struct ospf_lsa * |
718e3744 | 1386 | ospf_summary_asbr_lsa_new (struct ospf_area *area, struct prefix *p, |
1387 | u_int32_t metric, struct in_addr id) | |
1388 | { | |
1389 | struct stream *s; | |
1390 | struct ospf_lsa *new; | |
1391 | struct lsa_header *lsah; | |
1392 | int length; | |
1393 | ||
c24d602e | 1394 | if (id.s_addr == 0xffffffff) |
1395 | { | |
1396 | /* Maybe Link State ID not available. */ | |
1397 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1398 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1399 | OSPF_ASBR_SUMMARY_LSA); | |
1400 | return NULL; | |
1401 | } | |
1402 | ||
718e3744 | 1403 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 1404 | zlog_debug ("LSA[Type3]: Create summary-LSA instance"); |
718e3744 | 1405 | |
1406 | /* Create new stream for LSA. */ | |
1407 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1408 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1409 | ||
68980084 | 1410 | lsa_header_set (s, LSA_OPTIONS_GET (area), OSPF_ASBR_SUMMARY_LSA, |
1411 | id, area->ospf->router_id); | |
718e3744 | 1412 | |
1413 | /* Set summary-LSA body fields. */ | |
1414 | ospf_summary_asbr_lsa_body_set (s, p, metric); | |
1415 | ||
1416 | /* Set length. */ | |
1417 | length = stream_get_endp (s); | |
1418 | lsah->length = htons (length); | |
1419 | ||
1420 | /* Create OSPF LSA instance. */ | |
1421 | new = ospf_lsa_new (); | |
1422 | new->area = area; | |
f6543138 | 1423 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1424 | |
1425 | /* Copy LSA to store. */ | |
1426 | new->data = ospf_lsa_data_new (length); | |
1427 | memcpy (new->data, lsah, length); | |
1428 | stream_free (s); | |
1429 | ||
1430 | return new; | |
1431 | } | |
1432 | ||
1433 | /* Originate summary-ASBR-LSA. */ | |
1434 | struct ospf_lsa * | |
1435 | ospf_summary_asbr_lsa_originate (struct prefix_ipv4 *p, u_int32_t metric, | |
1436 | struct ospf_area *area) | |
1437 | { | |
1438 | struct ospf_lsa *new; | |
1439 | struct in_addr id; | |
1440 | ||
68980084 | 1441 | id = ospf_lsa_unique_id (area->ospf, area->lsdb, OSPF_ASBR_SUMMARY_LSA, p); |
718e3744 | 1442 | |
c24d602e | 1443 | if (id.s_addr == 0xffffffff) |
1444 | { | |
1445 | /* Maybe Link State ID not available. */ | |
1446 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1447 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1448 | OSPF_ASBR_SUMMARY_LSA); | |
1449 | return NULL; | |
1450 | } | |
1451 | ||
718e3744 | 1452 | /* Create new summary-LSA instance. */ |
1453 | new = ospf_summary_asbr_lsa_new (area, (struct prefix *) p, metric, id); | |
c24d602e | 1454 | if (!new) |
1455 | return NULL; | |
718e3744 | 1456 | |
1457 | /* Install LSA to LSDB. */ | |
68980084 | 1458 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 1459 | |
1460 | /* Update LSA origination count. */ | |
68980084 | 1461 | area->ospf->lsa_originate_count++; |
718e3744 | 1462 | |
1463 | /* Flooding new LSA through area. */ | |
1464 | ospf_flood_through_area (area, NULL, new); | |
1465 | ||
1466 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1467 | { | |
e588f21f | 1468 | zlog_debug ("LSA[Type%d:%s]: Originate summary-ASBR-LSA %p", |
718e3744 | 1469 | new->data->type, inet_ntoa (new->data->id), new); |
1470 | ospf_lsa_header_dump (new->data); | |
1471 | } | |
1472 | ||
1473 | return new; | |
1474 | } | |
1475 | ||
1476 | struct ospf_lsa* | |
68980084 | 1477 | ospf_summary_asbr_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1478 | { |
1479 | struct ospf_lsa *new; | |
1480 | struct summary_lsa *sl; | |
1481 | struct prefix p; | |
1482 | ||
1483 | /* Sanity check. */ | |
1484 | assert (lsa->data); | |
1485 | ||
1486 | sl = (struct summary_lsa *)lsa->data; | |
1487 | p.prefixlen = ip_masklen (sl->mask); | |
1488 | new = ospf_summary_asbr_lsa_new (lsa->area, &p, GET_METRIC (sl->metric), | |
1489 | sl->header.id); | |
c24d602e | 1490 | if (!new) |
1491 | return NULL; | |
718e3744 | 1492 | |
1493 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
718e3744 | 1494 | |
68980084 | 1495 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 1496 | |
1497 | /* Flood LSA through area. */ | |
1498 | ospf_flood_through_area (new->area, NULL, new); | |
1499 | ||
1500 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1501 | { | |
e588f21f | 1502 | zlog_debug ("LSA[Type%d:%s]: summary-ASBR-LSA refresh", |
718e3744 | 1503 | new->data->type, inet_ntoa (new->data->id)); |
1504 | ospf_lsa_header_dump (new->data); | |
1505 | } | |
1506 | ||
1507 | return new; | |
1508 | } | |
1509 | ||
1510 | /* AS-external-LSA related functions. */ | |
1511 | ||
1512 | /* Get nexthop for AS-external-LSAs. Return nexthop if its interface | |
1513 | is connected, else 0*/ | |
4dadc291 | 1514 | static struct in_addr |
68980084 | 1515 | ospf_external_lsa_nexthop_get (struct ospf *ospf, struct in_addr nexthop) |
718e3744 | 1516 | { |
1517 | struct in_addr fwd; | |
1518 | struct prefix nh; | |
1eb8ef25 | 1519 | struct listnode *node; |
1520 | struct ospf_interface *oi; | |
718e3744 | 1521 | |
1522 | fwd.s_addr = 0; | |
1523 | ||
1524 | if (!nexthop.s_addr) | |
1525 | return fwd; | |
1526 | ||
1527 | /* Check whether nexthop is covered by OSPF network. */ | |
1528 | nh.family = AF_INET; | |
1529 | nh.u.prefix4 = nexthop; | |
1530 | nh.prefixlen = IPV4_MAX_BITLEN; | |
4ca15d4a PJ |
1531 | |
1532 | /* XXX/SCALE: If there were a lot of oi's on an ifp, then it'd be | |
1533 | * better to make use of the per-ifp table of ois. | |
1534 | */ | |
1eb8ef25 | 1535 | for (ALL_LIST_ELEMENTS_RO (ospf->oiflist, node, oi)) |
1536 | if (if_is_operative (oi->ifp)) | |
1537 | if (oi->address->family == AF_INET) | |
1538 | if (prefix_match (oi->address, &nh)) | |
1539 | return nexthop; | |
718e3744 | 1540 | |
1541 | return fwd; | |
1542 | } | |
1543 | ||
718e3744 | 1544 | /* NSSA-external-LSA related functions. */ |
1545 | ||
1546 | /* Get 1st IP connection for Forward Addr */ | |
4dadc291 | 1547 | |
718e3744 | 1548 | struct in_addr |
1549 | ospf_get_ip_from_ifp (struct ospf_interface *oi) | |
1550 | { | |
1551 | struct in_addr fwd; | |
1552 | ||
1553 | fwd.s_addr = 0; | |
1554 | ||
2e3b2e47 | 1555 | if (if_is_operative (oi->ifp)) |
718e3744 | 1556 | return oi->address->u.prefix4; |
1557 | ||
1558 | return fwd; | |
1559 | } | |
1560 | ||
1561 | /* Get 1st IP connection for Forward Addr */ | |
1562 | struct in_addr | |
f2c80652 | 1563 | ospf_get_nssa_ip (struct ospf_area *area) |
718e3744 | 1564 | { |
1565 | struct in_addr fwd; | |
f2c80652 | 1566 | struct in_addr best_default; |
1eb8ef25 | 1567 | struct listnode *node; |
1568 | struct ospf_interface *oi; | |
718e3744 | 1569 | |
1570 | fwd.s_addr = 0; | |
f2c80652 | 1571 | best_default.s_addr = 0; |
718e3744 | 1572 | |
1eb8ef25 | 1573 | for (ALL_LIST_ELEMENTS_RO (area->ospf->oiflist, node, oi)) |
718e3744 | 1574 | { |
2e3b2e47 | 1575 | if (if_is_operative (oi->ifp)) |
718e3744 | 1576 | if (oi->area->external_routing == OSPF_AREA_NSSA) |
68980084 | 1577 | if (oi->address && oi->address->family == AF_INET) |
1578 | { | |
1579 | if (best_default.s_addr == 0) | |
1580 | best_default = oi->address->u.prefix4; | |
1581 | if (oi->area == area) | |
1582 | return oi->address->u.prefix4; | |
f2c80652 | 1583 | } |
718e3744 | 1584 | } |
f2c80652 | 1585 | if (best_default.s_addr != 0) |
1586 | return best_default; | |
718e3744 | 1587 | |
68980084 | 1588 | if (best_default.s_addr != 0) |
1589 | return best_default; | |
1590 | ||
718e3744 | 1591 | return fwd; |
1592 | } | |
beebba75 | 1593 | |
718e3744 | 1594 | #define DEFAULT_DEFAULT_METRIC 20 |
1595 | #define DEFAULT_DEFAULT_ORIGINATE_METRIC 10 | |
1596 | #define DEFAULT_DEFAULT_ALWAYS_METRIC 1 | |
1597 | ||
1598 | #define DEFAULT_METRIC_TYPE EXTERNAL_METRIC_TYPE_2 | |
1599 | ||
1600 | int | |
68980084 | 1601 | metric_type (struct ospf *ospf, u_char src) |
718e3744 | 1602 | { |
68980084 | 1603 | return (ospf->dmetric[src].type < 0 ? |
1604 | DEFAULT_METRIC_TYPE : ospf->dmetric[src].type); | |
718e3744 | 1605 | } |
1606 | ||
1607 | int | |
68980084 | 1608 | metric_value (struct ospf *ospf, u_char src) |
718e3744 | 1609 | { |
68980084 | 1610 | if (ospf->dmetric[src].value < 0) |
718e3744 | 1611 | { |
1612 | if (src == DEFAULT_ROUTE) | |
1613 | { | |
68980084 | 1614 | if (ospf->default_originate == DEFAULT_ORIGINATE_ZEBRA) |
718e3744 | 1615 | return DEFAULT_DEFAULT_ORIGINATE_METRIC; |
1616 | else | |
1617 | return DEFAULT_DEFAULT_ALWAYS_METRIC; | |
1618 | } | |
68980084 | 1619 | else if (ospf->default_metric < 0) |
718e3744 | 1620 | return DEFAULT_DEFAULT_METRIC; |
1621 | else | |
68980084 | 1622 | return ospf->default_metric; |
718e3744 | 1623 | } |
1624 | ||
68980084 | 1625 | return ospf->dmetric[src].value; |
718e3744 | 1626 | } |
1627 | ||
1628 | /* Set AS-external-LSA body. */ | |
4dadc291 | 1629 | static void |
68980084 | 1630 | ospf_external_lsa_body_set (struct stream *s, struct external_info *ei, |
1631 | struct ospf *ospf) | |
718e3744 | 1632 | { |
1633 | struct prefix_ipv4 *p = &ei->p; | |
1634 | struct in_addr mask, fwd_addr; | |
1635 | u_int32_t mvalue; | |
1636 | int mtype; | |
1637 | int type; | |
1638 | ||
1639 | /* Put Network Mask. */ | |
1640 | masklen2ip (p->prefixlen, &mask); | |
1641 | stream_put_ipv4 (s, mask.s_addr); | |
1642 | ||
1643 | /* If prefix is default, specify DEFAULT_ROUTE. */ | |
1644 | type = is_prefix_default (&ei->p) ? DEFAULT_ROUTE : ei->type; | |
1645 | ||
1646 | mtype = (ROUTEMAP_METRIC_TYPE (ei) != -1) ? | |
68980084 | 1647 | ROUTEMAP_METRIC_TYPE (ei) : metric_type (ospf, type); |
718e3744 | 1648 | |
1649 | mvalue = (ROUTEMAP_METRIC (ei) != -1) ? | |
68980084 | 1650 | ROUTEMAP_METRIC (ei) : metric_value (ospf, type); |
718e3744 | 1651 | |
1652 | /* Put type of external metric. */ | |
1653 | stream_putc (s, (mtype == EXTERNAL_METRIC_TYPE_2 ? 0x80 : 0)); | |
1654 | ||
1655 | /* Put 0 metric. TOS metric is not supported. */ | |
1656 | stream_put_ospf_metric (s, mvalue); | |
1657 | ||
1658 | /* Get forwarding address to nexthop if on the Connection List, else 0. */ | |
68980084 | 1659 | fwd_addr = ospf_external_lsa_nexthop_get (ospf, ei->nexthop); |
718e3744 | 1660 | |
1661 | /* Put forwarding address. */ | |
1662 | stream_put_ipv4 (s, fwd_addr.s_addr); | |
1663 | ||
1664 | /* Put route tag -- This value should be introduced from configuration. */ | |
1665 | stream_putl (s, 0); | |
1666 | } | |
1667 | ||
1668 | /* Create new external-LSA. */ | |
4dadc291 | 1669 | static struct ospf_lsa * |
68980084 | 1670 | ospf_external_lsa_new (struct ospf *ospf, |
1671 | struct external_info *ei, struct in_addr *old_id) | |
718e3744 | 1672 | { |
1673 | struct stream *s; | |
1674 | struct lsa_header *lsah; | |
1675 | struct ospf_lsa *new; | |
1676 | struct in_addr id; | |
1677 | int length; | |
1678 | ||
1679 | if (ei == NULL) | |
1680 | { | |
1681 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1682 | zlog_debug ("LSA[Type5]: External info is NULL, could not originated"); |
718e3744 | 1683 | return NULL; |
1684 | } | |
1685 | ||
1686 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1687 | zlog_debug ("LSA[Type5]: Originate AS-external-LSA instance"); |
718e3744 | 1688 | |
1689 | /* If old Link State ID is specified, refresh LSA with same ID. */ | |
1690 | if (old_id) | |
1691 | id = *old_id; | |
1692 | /* Get Link State with unique ID. */ | |
1693 | else | |
1694 | { | |
68980084 | 1695 | id = ospf_lsa_unique_id (ospf, ospf->lsdb, OSPF_AS_EXTERNAL_LSA, &ei->p); |
718e3744 | 1696 | if (id.s_addr == 0xffffffff) |
1697 | { | |
1698 | /* Maybe Link State ID not available. */ | |
1699 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1700 | zlog_debug ("LSA[Type5]: Link ID not available, can't originate"); |
718e3744 | 1701 | return NULL; |
1702 | } | |
1703 | } | |
1704 | ||
1705 | /* Create new stream for LSA. */ | |
1706 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1707 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1708 | ||
1709 | /* Set LSA common header fields. */ | |
68980084 | 1710 | lsa_header_set (s, OSPF_OPTION_E, OSPF_AS_EXTERNAL_LSA, |
1711 | id, ospf->router_id); | |
718e3744 | 1712 | |
1713 | /* Set AS-external-LSA body fields. */ | |
68980084 | 1714 | ospf_external_lsa_body_set (s, ei, ospf); |
718e3744 | 1715 | |
1716 | /* Set length. */ | |
1717 | length = stream_get_endp (s); | |
1718 | lsah->length = htons (length); | |
1719 | ||
1720 | /* Now, create OSPF LSA instance. */ | |
1721 | new = ospf_lsa_new (); | |
1722 | new->area = NULL; | |
f6543138 | 1723 | SET_FLAG (new->flags, OSPF_LSA_SELF | OSPF_LSA_APPROVED | OSPF_LSA_SELF_CHECKED); |
718e3744 | 1724 | |
1725 | /* Copy LSA data to store, discard stream. */ | |
1726 | new->data = ospf_lsa_data_new (length); | |
1727 | memcpy (new->data, lsah, length); | |
1728 | stream_free (s); | |
1729 | ||
1730 | return new; | |
1731 | } | |
1732 | ||
718e3744 | 1733 | /* As Type-7 */ |
4dadc291 | 1734 | static void |
68980084 | 1735 | ospf_install_flood_nssa (struct ospf *ospf, |
1736 | struct ospf_lsa *lsa, struct external_info *ei) | |
718e3744 | 1737 | { |
d4a53d58 | 1738 | struct ospf_lsa *new; |
68980084 | 1739 | struct as_external_lsa *extlsa; |
1eb8ef25 | 1740 | struct ospf_area *area; |
1741 | struct listnode *node, *nnode; | |
718e3744 | 1742 | |
d4a53d58 | 1743 | /* LSA may be a Type-5 originated via translation of a Type-7 LSA |
1744 | * which originated from an NSSA area. In which case it should not be | |
1745 | * flooded back to NSSA areas. | |
1746 | */ | |
1747 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
1748 | return; | |
1749 | ||
718e3744 | 1750 | /* NSSA Originate or Refresh (If anyNSSA) |
1751 | ||
1752 | LSA is self-originated. And just installed as Type-5. | |
1753 | Additionally, install as Type-7 LSDB for every attached NSSA. | |
1754 | ||
1755 | P-Bit controls which ABR performs translation to outside world; If | |
1756 | we are an ABR....do not set the P-bit, because we send the Type-5, | |
1757 | not as the ABR Translator, but as the ASBR owner within the AS! | |
1758 | ||
1759 | If we are NOT ABR, Flood through NSSA as Type-7 w/P-bit set. The | |
1760 | elected ABR Translator will see the P-bit, Translate, and re-flood. | |
1761 | ||
1762 | Later, ABR_TASK and P-bit will scan Type-7 LSDB and translate to | |
1763 | Type-5's to non-NSSA Areas. (it will also attempt a re-install) */ | |
1764 | ||
1eb8ef25 | 1765 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
68980084 | 1766 | { |
0c14ad88 | 1767 | /* Don't install Type-7 LSA's into nonNSSA area */ |
1768 | if (area->external_routing != OSPF_AREA_NSSA) | |
1769 | continue; | |
718e3744 | 1770 | |
68980084 | 1771 | /* make lsa duplicate, lock=1 */ |
d4a53d58 | 1772 | new = ospf_lsa_dup (lsa); |
1773 | new->area = area; | |
1774 | new->data->type = OSPF_AS_NSSA_LSA; | |
718e3744 | 1775 | |
68980084 | 1776 | /* set P-bit if not ABR */ |
020709f9 | 1777 | if (! IS_OSPF_ABR (ospf)) |
68980084 | 1778 | { |
d4a53d58 | 1779 | SET_FLAG(new->data->options, OSPF_OPTION_NP); |
68980084 | 1780 | |
1781 | /* set non-zero FWD ADDR | |
1782 | ||
1783 | draft-ietf-ospf-nssa-update-09.txt | |
1784 | ||
1785 | if the network between the NSSA AS boundary router and the | |
1786 | adjacent AS is advertised into OSPF as an internal OSPF route, | |
1787 | the forwarding address should be the next op address as is cu | |
1788 | currently done with type-5 LSAs. If the intervening network is | |
1789 | not adversited into OSPF as an internal OSPF route and the | |
1790 | type-7 LSA's P-bit is set a forwarding address should be | |
1791 | selected from one of the router's active OSPF inteface addresses | |
1792 | which belong to the NSSA. If no such addresses exist, then | |
1793 | no type-7 LSA's with the P-bit set should originate from this | |
1794 | router. */ | |
1795 | ||
d4a53d58 | 1796 | /* kevinm: not updating lsa anymore, just new */ |
1797 | extlsa = (struct as_external_lsa *)(new->data); | |
68980084 | 1798 | |
1799 | if (extlsa->e[0].fwd_addr.s_addr == 0) | |
1800 | extlsa->e[0].fwd_addr = ospf_get_nssa_ip(area); /* this NSSA area in ifp */ | |
718e3744 | 1801 | |
d748032f | 1802 | if (extlsa->e[0].fwd_addr.s_addr == 0) |
1803 | { | |
1804 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1805 | zlog_debug ("LSA[Type-7]: Could not build FWD-ADDR"); |
1fe6ed38 | 1806 | ospf_lsa_discard (new); |
d748032f | 1807 | return; |
1808 | } | |
f2c80652 | 1809 | } |
718e3744 | 1810 | |
68980084 | 1811 | /* install also as Type-7 */ |
d4a53d58 | 1812 | ospf_lsa_install (ospf, NULL, new); /* Remove Old, Lock New = 2 */ |
68980084 | 1813 | |
1814 | /* will send each copy, lock=2+n */ | |
d4a53d58 | 1815 | ospf_flood_through_as (ospf, NULL, new); /* all attached NSSA's, no AS/STUBs */ |
1816 | } | |
1817 | } | |
1818 | ||
4dadc291 | 1819 | static struct ospf_lsa * |
d4a53d58 | 1820 | ospf_lsa_translated_nssa_new (struct ospf *ospf, |
1821 | struct ospf_lsa *type7) | |
1822 | { | |
1823 | ||
1824 | struct ospf_lsa *new; | |
1825 | struct as_external_lsa *ext, *extnew; | |
1826 | struct external_info ei; | |
1827 | ||
1828 | ext = (struct as_external_lsa *)(type7->data); | |
1829 | ||
1830 | /* need external_info struct, fill in bare minimum */ | |
1831 | ei.p.family = AF_INET; | |
1832 | ei.p.prefix = type7->data->id; | |
1833 | ei.p.prefixlen = ip_masklen (ext->mask); | |
1834 | ei.type = ZEBRA_ROUTE_OSPF; | |
1835 | ei.nexthop = ext->header.adv_router; | |
1836 | ei.route_map_set.metric = -1; | |
1837 | ei.route_map_set.metric_type = -1; | |
1838 | ei.tag = 0; | |
1839 | ||
1840 | if ( (new = ospf_external_lsa_new (ospf, &ei, &type7->data->id)) == NULL) | |
1841 | { | |
1842 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1843 | zlog_debug ("ospf_nssa_translate_originate(): Could not originate " |
d4a53d58 | 1844 | "Translated Type-5 for %s", |
1845 | inet_ntoa (ei.p.prefix)); | |
1846 | return NULL; | |
1847 | } | |
1848 | ||
1849 | extnew = (struct as_external_lsa *)(new->data); | |
1850 | ||
1851 | /* copy over Type-7 data to new */ | |
1852 | extnew->e[0].tos = ext->e[0].tos; | |
1853 | extnew->e[0].route_tag = ext->e[0].route_tag; | |
1854 | extnew->e[0].fwd_addr.s_addr = ext->e[0].fwd_addr.s_addr; | |
1855 | new->data->ls_seqnum = type7->data->ls_seqnum; | |
1856 | ||
1857 | /* add translated flag, checksum and lock new lsa */ | |
1858 | SET_FLAG (new->flags, OSPF_LSA_LOCAL_XLT); /* Translated from 7 */ | |
d4a53d58 | 1859 | new = ospf_lsa_lock (new); |
1860 | ||
1861 | return new; | |
1862 | } | |
1863 | ||
d4a53d58 | 1864 | /* Originate Translated Type-5 for supplied Type-7 NSSA LSA */ |
1865 | struct ospf_lsa * | |
1866 | ospf_translated_nssa_originate (struct ospf *ospf, struct ospf_lsa *type7) | |
1867 | { | |
1868 | struct ospf_lsa *new; | |
1869 | struct as_external_lsa *extnew; | |
1870 | ||
1871 | /* we cant use ospf_external_lsa_originate() as we need to set | |
1872 | * the OSPF_LSA_LOCAL_XLT flag, must originate by hand | |
1873 | */ | |
1874 | ||
1875 | if ( (new = ospf_lsa_translated_nssa_new (ospf, type7)) == NULL) | |
1876 | { | |
1877 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1878 | zlog_debug ("ospf_translated_nssa_originate(): Could not translate " |
d4a53d58 | 1879 | "Type-7, Id %s, to Type-5", |
1880 | inet_ntoa (type7->data->id)); | |
1881 | return NULL; | |
1882 | } | |
1883 | ||
1884 | extnew = (struct as_external_lsa *)new; | |
1885 | ||
1886 | if (IS_DEBUG_OSPF_NSSA) | |
1887 | { | |
e588f21f | 1888 | zlog_debug ("ospf_translated_nssa_originate(): " |
d4a53d58 | 1889 | "translated Type 7, installed:"); |
1890 | ospf_lsa_header_dump (new->data); | |
e588f21f | 1891 | zlog_debug (" Network mask: %d",ip_masklen (extnew->mask)); |
1892 | zlog_debug (" Forward addr: %s", inet_ntoa (extnew->e[0].fwd_addr)); | |
d4a53d58 | 1893 | } |
1894 | ||
1895 | if ( (new = ospf_lsa_install (ospf, NULL, new)) == NULL) | |
1896 | { | |
1897 | if (IS_DEBUG_OSPF_NSSA); | |
e588f21f | 1898 | zlog_debug ("ospf_lsa_translated_nssa_originate(): " |
d4a53d58 | 1899 | "Could not install LSA " |
1900 | "id %s", inet_ntoa (type7->data->id)); | |
1901 | return NULL; | |
1902 | } | |
1903 | ||
1904 | ospf->lsa_originate_count++; | |
1905 | ospf_flood_through_as (ospf, NULL, new); | |
1906 | ||
1907 | return new; | |
1908 | } | |
1909 | ||
1910 | /* Refresh Translated from NSSA AS-external-LSA. */ | |
1911 | struct ospf_lsa * | |
1912 | ospf_translated_nssa_refresh (struct ospf *ospf, struct ospf_lsa *type7, | |
1913 | struct ospf_lsa *type5) | |
1914 | { | |
1915 | struct ospf_lsa *new = NULL; | |
1916 | ||
1917 | /* Sanity checks. */ | |
1918 | assert (type7 || type5); | |
ae128056 | 1919 | if (!(type7 || type5)) |
e54e6e57 | 1920 | return NULL; |
d4a53d58 | 1921 | if (type7) |
1922 | assert (type7->data); | |
1923 | if (type5) | |
1924 | assert (type5->data); | |
1925 | assert (ospf->anyNSSA); | |
1926 | ||
1927 | /* get required data according to what has been given */ | |
1928 | if (type7 && type5 == NULL) | |
1929 | { | |
1930 | /* find the translated Type-5 for this Type-7 */ | |
1931 | struct as_external_lsa *ext = (struct as_external_lsa *)(type7->data); | |
1932 | struct prefix_ipv4 p = | |
1933 | { | |
1934 | .prefix = type7->data->id, | |
1935 | .prefixlen = ip_masklen (ext->mask), | |
1936 | .family = AF_INET, | |
1937 | }; | |
1938 | ||
1939 | type5 = ospf_external_info_find_lsa (ospf, &p); | |
1940 | } | |
1941 | else if (type5 && type7 == NULL) | |
1942 | { | |
1943 | /* find the type-7 from which supplied type-5 was translated, | |
1944 | * ie find first type-7 with same LSA Id. | |
1945 | */ | |
1eb8ef25 | 1946 | struct listnode *ln, *lnn; |
d4a53d58 | 1947 | struct route_node *rn; |
1948 | struct ospf_lsa *lsa; | |
1949 | struct ospf_area *area; | |
1950 | ||
1eb8ef25 | 1951 | for (ALL_LIST_ELEMENTS (ospf->areas, ln, lnn, area)) |
d4a53d58 | 1952 | { |
1953 | if (area->external_routing != OSPF_AREA_NSSA | |
1954 | && !type7) | |
1955 | continue; | |
1956 | ||
1957 | LSDB_LOOP (NSSA_LSDB(area), rn, lsa) | |
1958 | { | |
1959 | if (lsa->data->id.s_addr == type5->data->id.s_addr) | |
1960 | { | |
1961 | type7 = lsa; | |
1962 | break; | |
1963 | } | |
1964 | } | |
1965 | } | |
68980084 | 1966 | } |
d4a53d58 | 1967 | |
1968 | /* do we have type7? */ | |
1969 | if (!type7) | |
1970 | { | |
1971 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1972 | zlog_debug ("ospf_translated_nssa_refresh(): no Type-7 found for " |
d4a53d58 | 1973 | "Type-5 LSA Id %s", |
e54e6e57 | 1974 | inet_ntoa (type5->data->id)); |
d4a53d58 | 1975 | return NULL; |
1976 | } | |
1977 | ||
1978 | /* do we have valid translated type5? */ | |
1979 | if (type5 == NULL || !CHECK_FLAG (type5->flags, OSPF_LSA_LOCAL_XLT) ) | |
1980 | { | |
1981 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1982 | zlog_debug ("ospf_translated_nssa_refresh(): No translated Type-5 " |
d4a53d58 | 1983 | "found for Type-7 with Id %s", |
1984 | inet_ntoa (type7->data->id)); | |
1985 | return NULL; | |
1986 | } | |
1987 | ||
1988 | /* Delete LSA from neighbor retransmit-list. */ | |
1989 | ospf_ls_retransmit_delete_nbr_as (ospf, type5); | |
1990 | ||
1991 | /* create new translated LSA */ | |
1992 | if ( (new = ospf_lsa_translated_nssa_new (ospf, type7)) == NULL) | |
1993 | { | |
1994 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1995 | zlog_debug ("ospf_translated_nssa_refresh(): Could not translate " |
d4a53d58 | 1996 | "Type-7 for %s to Type-5", |
1997 | inet_ntoa (type7->data->id)); | |
1998 | return NULL; | |
1999 | } | |
2000 | ||
2001 | if ( !(new = ospf_lsa_install (ospf, NULL, new)) ) | |
2002 | { | |
2003 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 2004 | zlog_debug ("ospf_translated_nssa_refresh(): Could not install " |
d4a53d58 | 2005 | "translated LSA, Id %s", |
5db95bc2 | 2006 | inet_ntoa (type7->data->id)); |
d4a53d58 | 2007 | return NULL; |
2008 | } | |
2009 | ||
2010 | /* Flood LSA through area. */ | |
2011 | ospf_flood_through_as (ospf, NULL, new); | |
2012 | ||
2013 | return new; | |
718e3744 | 2014 | } |
718e3744 | 2015 | |
2016 | int | |
2017 | is_prefix_default (struct prefix_ipv4 *p) | |
2018 | { | |
2019 | struct prefix_ipv4 q; | |
2020 | ||
2021 | q.family = AF_INET; | |
2022 | q.prefix.s_addr = 0; | |
2023 | q.prefixlen = 0; | |
2024 | ||
2025 | return prefix_same ((struct prefix *) p, (struct prefix *) &q); | |
2026 | } | |
2027 | ||
2028 | /* Originate an AS-external-LSA, install and flood. */ | |
2029 | struct ospf_lsa * | |
68980084 | 2030 | ospf_external_lsa_originate (struct ospf *ospf, struct external_info *ei) |
718e3744 | 2031 | { |
2032 | struct ospf_lsa *new; | |
2033 | ||
2034 | /* Added for NSSA project.... | |
2035 | ||
2036 | External LSAs are originated in ASBRs as usual, but for NSSA systems. | |
2037 | there is the global Type-5 LSDB and a Type-7 LSDB installed for | |
2038 | every area. The Type-7's are flooded to every IR and every ABR; We | |
2039 | install the Type-5 LSDB so that the normal "refresh" code operates | |
2040 | as usual, and flag them as not used during ASE calculations. The | |
2041 | Type-7 LSDB is used for calculations. Each Type-7 has a Forwarding | |
2042 | Address of non-zero. | |
2043 | ||
2044 | If an ABR is the elected NSSA translator, following SPF and during | |
2045 | the ABR task it will translate all the scanned Type-7's, with P-bit | |
2046 | ON and not-self generated, and translate to Type-5's throughout the | |
2047 | non-NSSA/STUB AS. | |
2048 | ||
2049 | A difference in operation depends whether this ASBR is an ABR | |
2050 | or not. If not an ABR, the P-bit is ON, to indicate that any | |
2051 | elected NSSA-ABR can perform its translation. | |
2052 | ||
2053 | If an ABR, the P-bit is OFF; No ABR will perform translation and | |
2054 | this ASBR will flood the Type-5 LSA as usual. | |
2055 | ||
2056 | For the case where this ASBR is not an ABR, the ASE calculations | |
2057 | are based on the Type-5 LSDB; The Type-7 LSDB exists just to | |
2058 | demonstrate to the user that there are LSA's that belong to any | |
2059 | attached NSSA. | |
2060 | ||
2061 | Finally, it just so happens that when the ABR is translating every | |
2062 | Type-7 into Type-5, it installs it into the Type-5 LSDB as an | |
2063 | approved Type-5 (translated from Type-7); at the end of translation | |
2064 | if any Translated Type-5's remain unapproved, then they must be | |
2065 | flushed from the AS. | |
2066 | ||
2067 | */ | |
2068 | ||
2069 | /* Check the AS-external-LSA should be originated. */ | |
68980084 | 2070 | if (!ospf_redistribute_check (ospf, ei, NULL)) |
718e3744 | 2071 | return NULL; |
2072 | ||
2073 | /* Create new AS-external-LSA instance. */ | |
68980084 | 2074 | if ((new = ospf_external_lsa_new (ospf, ei, NULL)) == NULL) |
718e3744 | 2075 | { |
2076 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2077 | zlog_debug ("LSA[Type5:%s]: Could not originate AS-external-LSA", |
718e3744 | 2078 | inet_ntoa (ei->p.prefix)); |
2079 | return NULL; | |
2080 | } | |
2081 | ||
2082 | /* Install newly created LSA into Type-5 LSDB, lock = 1. */ | |
68980084 | 2083 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 2084 | |
2085 | /* Update LSA origination count. */ | |
68980084 | 2086 | ospf->lsa_originate_count++; |
718e3744 | 2087 | |
2088 | /* Flooding new LSA. only to AS (non-NSSA/STUB) */ | |
68980084 | 2089 | ospf_flood_through_as (ospf, NULL, new); |
718e3744 | 2090 | |
718e3744 | 2091 | /* If there is any attached NSSA, do special handling */ |
d4a53d58 | 2092 | if (ospf->anyNSSA && |
2093 | /* stay away from translated LSAs! */ | |
2094 | !(CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT))) | |
68980084 | 2095 | ospf_install_flood_nssa (ospf, new, ei); /* Install/Flood Type-7 to all NSSAs */ |
718e3744 | 2096 | |
2097 | /* Debug logging. */ | |
2098 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2099 | { | |
e588f21f | 2100 | zlog_debug ("LSA[Type%d:%s]: Originate AS-external-LSA %p", |
718e3744 | 2101 | new->data->type, inet_ntoa (new->data->id), new); |
2102 | ospf_lsa_header_dump (new->data); | |
2103 | } | |
2104 | ||
2105 | return new; | |
2106 | } | |
2107 | ||
2108 | /* Originate AS-external-LSA from external info with initial flag. */ | |
2109 | int | |
68980084 | 2110 | ospf_external_lsa_originate_timer (struct thread *thread) |
718e3744 | 2111 | { |
68980084 | 2112 | struct ospf *ospf = THREAD_ARG (thread); |
718e3744 | 2113 | struct route_node *rn; |
2114 | struct external_info *ei; | |
2115 | struct route_table *rt; | |
68980084 | 2116 | int type = THREAD_VAL (thread); |
718e3744 | 2117 | |
68980084 | 2118 | ospf->t_external_lsa = NULL; |
718e3744 | 2119 | |
2120 | /* Originate As-external-LSA from all type of distribute source. */ | |
2121 | if ((rt = EXTERNAL_INFO (type))) | |
2122 | for (rn = route_top (rt); rn; rn = route_next (rn)) | |
2123 | if ((ei = rn->info) != NULL) | |
2124 | if (!is_prefix_default ((struct prefix_ipv4 *)&ei->p)) | |
68980084 | 2125 | if (!ospf_external_lsa_originate (ospf, ei)) |
718e3744 | 2126 | zlog_warn ("LSA: AS-external-LSA was not originated."); |
2127 | ||
2128 | return 0; | |
2129 | } | |
2130 | ||
4dadc291 | 2131 | static struct external_info * |
020709f9 | 2132 | ospf_default_external_info (struct ospf *ospf) |
718e3744 | 2133 | { |
2134 | int type; | |
2135 | struct route_node *rn; | |
2136 | struct prefix_ipv4 p; | |
2137 | ||
2138 | p.family = AF_INET; | |
2139 | p.prefix.s_addr = 0; | |
2140 | p.prefixlen = 0; | |
2141 | ||
2142 | /* First, lookup redistributed default route. */ | |
2143 | for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) | |
2144 | if (EXTERNAL_INFO (type) && type != ZEBRA_ROUTE_OSPF) | |
2145 | { | |
2146 | rn = route_node_lookup (EXTERNAL_INFO (type), (struct prefix *) &p); | |
2147 | if (rn != NULL) | |
2148 | { | |
2149 | route_unlock_node (rn); | |
2150 | assert (rn->info); | |
68980084 | 2151 | if (ospf_redistribute_check (ospf, rn->info, NULL)) |
718e3744 | 2152 | return rn->info; |
2153 | } | |
2154 | } | |
2155 | ||
2156 | return NULL; | |
2157 | } | |
2158 | ||
2159 | int | |
68980084 | 2160 | ospf_default_originate_timer (struct thread *thread) |
718e3744 | 2161 | { |
718e3744 | 2162 | struct prefix_ipv4 p; |
2163 | struct in_addr nexthop; | |
2164 | struct external_info *ei; | |
020709f9 | 2165 | struct ospf *ospf; |
718e3744 | 2166 | |
4021b60a | 2167 | ospf = THREAD_ARG (thread); |
718e3744 | 2168 | |
2169 | p.family = AF_INET; | |
2170 | p.prefix.s_addr = 0; | |
2171 | p.prefixlen = 0; | |
2172 | ||
4021b60a | 2173 | if (ospf->default_originate == DEFAULT_ORIGINATE_ALWAYS) |
718e3744 | 2174 | { |
2175 | /* If there is no default route via redistribute, | |
2176 | then originate AS-external-LSA with nexthop 0 (self). */ | |
2177 | nexthop.s_addr = 0; | |
2178 | ospf_external_info_add (DEFAULT_ROUTE, p, 0, nexthop); | |
2179 | } | |
2180 | ||
020709f9 | 2181 | if ((ei = ospf_default_external_info (ospf))) |
68980084 | 2182 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2183 | |
2184 | return 0; | |
2185 | } | |
2186 | ||
645878f1 | 2187 | /* Flush any NSSA LSAs for given prefix */ |
2188 | void | |
2189 | ospf_nssa_lsa_flush (struct ospf *ospf, struct prefix_ipv4 *p) | |
2190 | { | |
1eb8ef25 | 2191 | struct listnode *node, *nnode; |
645878f1 | 2192 | struct ospf_lsa *lsa; |
2193 | struct ospf_area *area; | |
2194 | ||
1eb8ef25 | 2195 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
645878f1 | 2196 | { |
1eb8ef25 | 2197 | if (area->external_routing == OSPF_AREA_NSSA) |
d748032f | 2198 | { |
2199 | if (!(lsa = ospf_lsa_lookup (area, OSPF_AS_NSSA_LSA, p->prefix, | |
2200 | ospf->router_id))) | |
2201 | { | |
2202 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2203 | zlog_debug ("LSA: There is no such AS-NSSA-LSA %s/%d in LSDB", |
d748032f | 2204 | inet_ntoa (p->prefix), p->prefixlen); |
2205 | continue; | |
2206 | } | |
2207 | ospf_ls_retransmit_delete_nbr_area (area, lsa); | |
2208 | if (!IS_LSA_MAXAGE (lsa)) | |
2209 | { | |
2210 | ospf_refresher_unregister_lsa (ospf, lsa); | |
2211 | ospf_lsa_flush_area (lsa, area); | |
2212 | } | |
2213 | } | |
645878f1 | 2214 | } |
2215 | } | |
645878f1 | 2216 | |
718e3744 | 2217 | /* Flush an AS-external-LSA from LSDB and routing domain. */ |
2218 | void | |
68980084 | 2219 | ospf_external_lsa_flush (struct ospf *ospf, |
2220 | u_char type, struct prefix_ipv4 *p, | |
5339cfdb | 2221 | unsigned int ifindex /*, struct in_addr nexthop */) |
718e3744 | 2222 | { |
2223 | struct ospf_lsa *lsa; | |
2224 | ||
2225 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2226 | zlog_debug ("LSA: Flushing AS-external-LSA %s/%d", |
718e3744 | 2227 | inet_ntoa (p->prefix), p->prefixlen); |
2228 | ||
2229 | /* First lookup LSA from LSDB. */ | |
68980084 | 2230 | if (!(lsa = ospf_external_info_find_lsa (ospf, p))) |
718e3744 | 2231 | { |
2232 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2233 | zlog_debug ("LSA: There is no such AS-external-LSA %s/%d in LSDB", |
718e3744 | 2234 | inet_ntoa (p->prefix), p->prefixlen); |
2235 | return; | |
2236 | } | |
beebba75 | 2237 | |
d4a53d58 | 2238 | /* If LSA is selforiginated, not a translated LSA, and there is |
2239 | * NSSA area, flush Type-7 LSA's at first. | |
2240 | */ | |
2241 | if (IS_LSA_SELF(lsa) && (ospf->anyNSSA) | |
2242 | && !(CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT))) | |
d748032f | 2243 | ospf_nssa_lsa_flush (ospf, p); |
718e3744 | 2244 | |
2245 | /* Sweep LSA from Link State Retransmit List. */ | |
68980084 | 2246 | ospf_ls_retransmit_delete_nbr_as (ospf, lsa); |
718e3744 | 2247 | |
2248 | /* There must be no self-originated LSA in rtrs_external. */ | |
2249 | #if 0 | |
2250 | /* Remove External route from Zebra. */ | |
2251 | ospf_zebra_delete ((struct prefix_ipv4 *) p, &nexthop); | |
2252 | #endif | |
2253 | ||
2254 | if (!IS_LSA_MAXAGE (lsa)) | |
2255 | { | |
2256 | /* Unregister LSA from Refresh queue. */ | |
68980084 | 2257 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 2258 | |
2259 | /* Flush AS-external-LSA through AS. */ | |
68980084 | 2260 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 2261 | } |
2262 | ||
2263 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2264 | zlog_debug ("ospf_external_lsa_flush(): stop"); |
718e3744 | 2265 | } |
2266 | ||
2267 | void | |
68980084 | 2268 | ospf_external_lsa_refresh_default (struct ospf *ospf) |
718e3744 | 2269 | { |
2270 | struct prefix_ipv4 p; | |
2271 | struct external_info *ei; | |
2272 | struct ospf_lsa *lsa; | |
2273 | ||
2274 | p.family = AF_INET; | |
2275 | p.prefixlen = 0; | |
2276 | p.prefix.s_addr = 0; | |
2277 | ||
020709f9 | 2278 | ei = ospf_default_external_info (ospf); |
68980084 | 2279 | lsa = ospf_external_info_find_lsa (ospf, &p); |
718e3744 | 2280 | |
2281 | if (ei) | |
2282 | { | |
2283 | if (lsa) | |
2284 | { | |
2285 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2286 | zlog_debug ("LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p", lsa); |
68980084 | 2287 | ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_FORCE); |
718e3744 | 2288 | } |
2289 | else | |
2290 | { | |
2291 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2292 | zlog_debug ("LSA[Type5:0.0.0.0]: Originate AS-external-LSA"); |
68980084 | 2293 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2294 | } |
2295 | } | |
2296 | else | |
2297 | { | |
2298 | if (lsa) | |
2299 | { | |
2300 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2301 | zlog_debug ("LSA[Type5:0.0.0.0]: Flush AS-external-LSA"); |
68980084 | 2302 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 2303 | } |
2304 | } | |
2305 | } | |
2306 | ||
2307 | void | |
68980084 | 2308 | ospf_external_lsa_refresh_type (struct ospf *ospf, u_char type, int force) |
718e3744 | 2309 | { |
2310 | struct route_node *rn; | |
2311 | struct external_info *ei; | |
2312 | ||
2313 | if (type != DEFAULT_ROUTE) | |
2314 | if (EXTERNAL_INFO(type)) | |
2315 | /* Refresh each redistributed AS-external-LSAs. */ | |
2316 | for (rn = route_top (EXTERNAL_INFO (type)); rn; rn = route_next (rn)) | |
2317 | if ((ei = rn->info)) | |
2318 | if (!is_prefix_default (&ei->p)) | |
2319 | { | |
2320 | struct ospf_lsa *lsa; | |
2321 | ||
68980084 | 2322 | if ((lsa = ospf_external_info_find_lsa (ospf, &ei->p))) |
2323 | ospf_external_lsa_refresh (ospf, lsa, ei, force); | |
718e3744 | 2324 | else |
68980084 | 2325 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2326 | } |
2327 | } | |
2328 | ||
2329 | /* Refresh AS-external-LSA. */ | |
2330 | void | |
68980084 | 2331 | ospf_external_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa, |
718e3744 | 2332 | struct external_info *ei, int force) |
2333 | { | |
2334 | struct ospf_lsa *new; | |
2335 | int changed; | |
2336 | ||
2337 | /* Check the AS-external-LSA should be originated. */ | |
68980084 | 2338 | if (!ospf_redistribute_check (ospf, ei, &changed)) |
718e3744 | 2339 | { |
d4a53d58 | 2340 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 2341 | zlog_debug ("LSA[Type%d:%s]: Could not be refreshed, " |
d4a53d58 | 2342 | "redist check fail", |
2343 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
68980084 | 2344 | ospf_external_lsa_flush (ospf, ei->type, &ei->p, |
5339cfdb | 2345 | ei->ifindex /*, ei->nexthop */); |
718e3744 | 2346 | return; |
2347 | } | |
2348 | ||
2349 | if (!changed && !force) | |
d4a53d58 | 2350 | { |
2351 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 2352 | zlog_debug ("LSA[Type%d:%s]: Not refreshed, not changed/forced", |
d4a53d58 | 2353 | lsa->data->type, inet_ntoa (lsa->data->id)); |
2354 | return; | |
2355 | } | |
718e3744 | 2356 | |
2357 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 2358 | ospf_ls_retransmit_delete_nbr_as (ospf, lsa); |
718e3744 | 2359 | |
2360 | /* Unregister AS-external-LSA from refresh-list. */ | |
68980084 | 2361 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 2362 | |
68980084 | 2363 | new = ospf_external_lsa_new (ospf, ei, &lsa->data->id); |
718e3744 | 2364 | |
2365 | if (new == NULL) | |
2366 | { | |
2367 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 2368 | zlog_debug ("LSA[Type%d:%s]: Could not be refreshed", lsa->data->type, |
718e3744 | 2369 | inet_ntoa (lsa->data->id)); |
2370 | return; | |
2371 | } | |
2372 | ||
2373 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
2374 | ||
68980084 | 2375 | ospf_lsa_install (ospf, NULL, new); /* As type-5. */ |
718e3744 | 2376 | |
2377 | /* Flood LSA through AS. */ | |
68980084 | 2378 | ospf_flood_through_as (ospf, NULL, new); |
718e3744 | 2379 | |
718e3744 | 2380 | /* If any attached NSSA, install as Type-7, flood to all NSSA Areas */ |
d4a53d58 | 2381 | if (ospf->anyNSSA && !(CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT))) |
68980084 | 2382 | ospf_install_flood_nssa (ospf, new, ei); /* Install/Flood per new rules */ |
718e3744 | 2383 | |
d4a53d58 | 2384 | /* Register self-originated LSA to refresh queue. |
2385 | * Translated LSAs should not be registered, but refreshed upon | |
2386 | * refresh of the Type-7 | |
2387 | */ | |
2388 | if ( !CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT) ) | |
2389 | ospf_refresher_register_lsa (ospf, new); | |
718e3744 | 2390 | |
2391 | /* Debug logging. */ | |
2392 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2393 | { | |
e588f21f | 2394 | zlog_debug ("LSA[Type%d:%s]: AS-external-LSA refresh", |
d4a53d58 | 2395 | new->data->type, inet_ntoa (new->data->id)); |
718e3744 | 2396 | ospf_lsa_header_dump (new->data); |
2397 | } | |
2398 | ||
2399 | return; | |
2400 | } | |
2401 | ||
2402 | \f | |
2403 | /* LSA installation functions. */ | |
2404 | ||
2405 | /* Install router-LSA to an area. */ | |
4dadc291 | 2406 | static struct ospf_lsa * |
68980084 | 2407 | ospf_router_lsa_install (struct ospf *ospf, |
2408 | struct ospf_lsa *new, int rt_recalc) | |
718e3744 | 2409 | { |
2410 | struct ospf_area *area = new->area; | |
2411 | ||
2412 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2413 | The entire routing table must be recalculated, starting with | |
2414 | the shortest path calculations for each area (not just the | |
2415 | area whose link-state database has changed). | |
2416 | */ | |
718e3744 | 2417 | |
5996e0df | 2418 | if (IS_LSA_SELF (new)) |
718e3744 | 2419 | { |
5996e0df JT |
2420 | |
2421 | /* Only install LSA if it is originated/refreshed by us. | |
2422 | * If LSA was received by flooding, the RECEIVED flag is set so do | |
2423 | * not link the LSA */ | |
2424 | if (CHECK_FLAG (new->flags, OSPF_LSA_RECEIVED)) | |
2425 | return new; /* ignore stale LSA */ | |
2426 | ||
718e3744 | 2427 | /* Set router-LSA refresh timer. */ |
2428 | OSPF_TIMER_OFF (area->t_router_lsa_self); | |
2429 | OSPF_AREA_TIMER_ON (area->t_router_lsa_self, | |
d4a53d58 | 2430 | ospf_router_lsa_timer, OSPF_LS_REFRESH_TIME); |
5996e0df | 2431 | |
718e3744 | 2432 | /* Set self-originated router-LSA. */ |
1fe6ed38 | 2433 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 2434 | area->router_lsa_self = ospf_lsa_lock (new); |
2435 | ||
718e3744 | 2436 | } |
5996e0df JT |
2437 | if (rt_recalc) |
2438 | ospf_spf_calculate_schedule (ospf); | |
718e3744 | 2439 | |
2440 | return new; | |
2441 | } | |
2442 | ||
2443 | #define OSPF_INTERFACE_TIMER_ON(T,F,V) \ | |
2444 | if (!(T)) \ | |
2445 | (T) = thread_add_timer (master, (F), oi, (V)) | |
2446 | ||
2447 | /* Install network-LSA to an area. */ | |
4dadc291 | 2448 | static struct ospf_lsa * |
68980084 | 2449 | ospf_network_lsa_install (struct ospf *ospf, |
2450 | struct ospf_interface *oi, | |
718e3744 | 2451 | struct ospf_lsa *new, |
2452 | int rt_recalc) | |
2453 | { | |
2454 | ||
2455 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2456 | The entire routing table must be recalculated, starting with | |
2457 | the shortest path calculations for each area (not just the | |
2458 | area whose link-state database has changed). | |
2459 | */ | |
5996e0df | 2460 | if (IS_LSA_SELF (new)) |
718e3744 | 2461 | { |
5996e0df JT |
2462 | /* We supposed that when LSA is originated by us, we pass the int |
2463 | for which it was originated. If LSA was received by flooding, | |
2464 | the RECEIVED flag is set, so we do not link the LSA to the int. */ | |
2465 | if (CHECK_FLAG (new->flags, OSPF_LSA_RECEIVED)) | |
2466 | return new; /* ignore stale LSA */ | |
2467 | ||
718e3744 | 2468 | /* Set LSRefresh timer. */ |
2469 | OSPF_TIMER_OFF (oi->t_network_lsa_self); | |
2470 | ||
2471 | OSPF_INTERFACE_TIMER_ON (oi->t_network_lsa_self, | |
2472 | ospf_network_lsa_refresh_timer, | |
2473 | OSPF_LS_REFRESH_TIME); | |
2474 | ||
1fe6ed38 | 2475 | ospf_lsa_unlock (&oi->network_lsa_self); |
718e3744 | 2476 | oi->network_lsa_self = ospf_lsa_lock (new); |
2477 | } | |
5996e0df JT |
2478 | if (rt_recalc) |
2479 | ospf_spf_calculate_schedule (ospf); | |
718e3744 | 2480 | |
2481 | return new; | |
2482 | } | |
2483 | ||
2484 | /* Install summary-LSA to an area. */ | |
4dadc291 | 2485 | static struct ospf_lsa * |
68980084 | 2486 | ospf_summary_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2487 | int rt_recalc) | |
718e3744 | 2488 | { |
718e3744 | 2489 | if (rt_recalc && !IS_LSA_SELF (new)) |
2490 | { | |
2491 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2492 | The best route to the destination described by the summary- | |
2493 | LSA must be recalculated (see Section 16.5). If this | |
2494 | destination is an AS boundary router, it may also be | |
2495 | necessary to re-examine all the AS-external-LSAs. | |
2496 | */ | |
2497 | ||
2498 | #if 0 | |
2499 | /* This doesn't exist yet... */ | |
2500 | ospf_summary_incremental_update(new); */ | |
2501 | #else /* #if 0 */ | |
68980084 | 2502 | ospf_spf_calculate_schedule (ospf); |
718e3744 | 2503 | #endif /* #if 0 */ |
2504 | ||
2505 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) | |
e588f21f | 2506 | zlog_debug ("ospf_summary_lsa_install(): SPF scheduled"); |
718e3744 | 2507 | } |
2508 | ||
2509 | if (IS_LSA_SELF (new)) | |
68980084 | 2510 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2511 | |
2512 | return new; | |
2513 | } | |
2514 | ||
2515 | /* Install ASBR-summary-LSA to an area. */ | |
4dadc291 | 2516 | static struct ospf_lsa * |
68980084 | 2517 | ospf_summary_asbr_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2518 | int rt_recalc) | |
718e3744 | 2519 | { |
2520 | if (rt_recalc && !IS_LSA_SELF (new)) | |
2521 | { | |
2522 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2523 | The best route to the destination described by the summary- | |
2524 | LSA must be recalculated (see Section 16.5). If this | |
2525 | destination is an AS boundary router, it may also be | |
2526 | necessary to re-examine all the AS-external-LSAs. | |
2527 | */ | |
2528 | #if 0 | |
2529 | /* These don't exist yet... */ | |
2530 | ospf_summary_incremental_update(new); | |
2531 | /* Isn't this done by the above call? | |
2532 | - RFC 2328 Section 16.5 implies it should be */ | |
2533 | /* ospf_ase_calculate_schedule(); */ | |
2534 | #else /* #if 0 */ | |
68980084 | 2535 | ospf_spf_calculate_schedule (ospf); |
718e3744 | 2536 | #endif /* #if 0 */ |
2537 | } | |
2538 | ||
2539 | /* register LSA to refresh-list. */ | |
2540 | if (IS_LSA_SELF (new)) | |
68980084 | 2541 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2542 | |
2543 | return new; | |
2544 | } | |
2545 | ||
2546 | /* Install AS-external-LSA. */ | |
4dadc291 | 2547 | static struct ospf_lsa * |
68980084 | 2548 | ospf_external_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2549 | int rt_recalc) | |
718e3744 | 2550 | { |
68980084 | 2551 | ospf_ase_register_external_lsa (new, ospf); |
718e3744 | 2552 | /* If LSA is not self-originated, calculate an external route. */ |
2553 | if (rt_recalc) | |
2554 | { | |
2555 | /* RFC 2328 Section 13.2 AS-external-LSAs | |
2556 | The best route to the destination described by the AS- | |
2557 | external-LSA must be recalculated (see Section 16.6). | |
2558 | */ | |
2559 | ||
2560 | if (!IS_LSA_SELF (new)) | |
d4a53d58 | 2561 | ospf_ase_incremental_update (ospf, new); |
718e3744 | 2562 | } |
2563 | ||
d4a53d58 | 2564 | if (new->data->type == OSPF_AS_NSSA_LSA) |
2565 | { | |
2566 | /* There is no point to register selforiginate Type-7 LSA for | |
2567 | * refreshing. We rely on refreshing Type-5 LSA's | |
2568 | */ | |
2569 | if (IS_LSA_SELF (new)) | |
2570 | return new; | |
2571 | else | |
2572 | { | |
2573 | /* Try refresh type-5 translated LSA for this LSA, if one exists. | |
2574 | * New translations will be taken care of by the abr_task. | |
2575 | */ | |
2576 | ospf_translated_nssa_refresh (ospf, new, NULL); | |
2577 | } | |
2578 | } | |
d748032f | 2579 | |
d4a53d58 | 2580 | /* Register self-originated LSA to refresh queue. |
8fc0f64b | 2581 | * Leave Translated LSAs alone if NSSA is enabled |
d4a53d58 | 2582 | */ |
beebba75 | 2583 | if (IS_LSA_SELF (new) && !CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT ) ) |
68980084 | 2584 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2585 | |
2586 | return new; | |
2587 | } | |
2588 | ||
2589 | void | |
68980084 | 2590 | ospf_discard_from_db (struct ospf *ospf, |
2591 | struct ospf_lsdb *lsdb, struct ospf_lsa *lsa) | |
718e3744 | 2592 | { |
2593 | struct ospf_lsa *old; | |
2594 | ||
ac904dec PJ |
2595 | if (!lsdb) |
2596 | { | |
2597 | zlog_warn ("%s: Called with NULL lsdb!", __func__); | |
2598 | if (!lsa) | |
2599 | zlog_warn ("%s: and NULL LSA!", __func__); | |
2600 | else | |
2601 | zlog_warn ("LSA[Type%d:%s]: not associated with LSDB!", | |
2602 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
2603 | return; | |
2604 | } | |
2605 | ||
718e3744 | 2606 | old = ospf_lsdb_lookup (lsdb, lsa); |
2607 | ||
2608 | if (!old) | |
2609 | return; | |
2610 | ||
2611 | if (old->refresh_list >= 0) | |
68980084 | 2612 | ospf_refresher_unregister_lsa (ospf, old); |
718e3744 | 2613 | |
2614 | switch (old->data->type) | |
2615 | { | |
2616 | case OSPF_AS_EXTERNAL_LSA: | |
69310a67 | 2617 | ospf_ase_unregister_external_lsa (old, ospf); |
2618 | ospf_ls_retransmit_delete_nbr_as (ospf, old); | |
2619 | break; | |
718e3744 | 2620 | #ifdef HAVE_OPAQUE_LSA |
2621 | case OSPF_OPAQUE_AS_LSA: | |
68980084 | 2622 | ospf_ls_retransmit_delete_nbr_as (ospf, old); |
718e3744 | 2623 | break; |
69310a67 | 2624 | #endif /* HAVE_OPAQUE_LSA */ |
d748032f | 2625 | case OSPF_AS_NSSA_LSA: |
2626 | ospf_ls_retransmit_delete_nbr_area (old->area, old); | |
2627 | ospf_ase_unregister_external_lsa (old, ospf); | |
beebba75 | 2628 | break; |
718e3744 | 2629 | default: |
68980084 | 2630 | ospf_ls_retransmit_delete_nbr_area (old->area, old); |
718e3744 | 2631 | break; |
2632 | } | |
2633 | ||
68980084 | 2634 | ospf_lsa_maxage_delete (ospf, old); |
718e3744 | 2635 | ospf_lsa_discard (old); |
2636 | } | |
2637 | ||
718e3744 | 2638 | struct ospf_lsa * |
68980084 | 2639 | ospf_lsa_install (struct ospf *ospf, struct ospf_interface *oi, |
2640 | struct ospf_lsa *lsa) | |
718e3744 | 2641 | { |
2642 | struct ospf_lsa *new = NULL; | |
2643 | struct ospf_lsa *old = NULL; | |
2644 | struct ospf_lsdb *lsdb = NULL; | |
2645 | int rt_recalc; | |
2646 | ||
2647 | /* Set LSDB. */ | |
2648 | switch (lsa->data->type) | |
2649 | { | |
f2c80652 | 2650 | /* kevinm */ |
2651 | case OSPF_AS_NSSA_LSA: | |
2652 | if (lsa->area) | |
2653 | lsdb = lsa->area->lsdb; | |
2654 | else | |
68980084 | 2655 | lsdb = ospf->lsdb; |
f2c80652 | 2656 | break; |
718e3744 | 2657 | case OSPF_AS_EXTERNAL_LSA: |
2658 | #ifdef HAVE_OPAQUE_LSA | |
2659 | case OSPF_OPAQUE_AS_LSA: | |
2660 | #endif /* HAVE_OPAQUE_LSA */ | |
68980084 | 2661 | lsdb = ospf->lsdb; |
718e3744 | 2662 | break; |
2663 | default: | |
2664 | lsdb = lsa->area->lsdb; | |
2665 | break; | |
2666 | } | |
2667 | ||
718e3744 | 2668 | assert (lsdb); |
2669 | ||
2670 | /* RFC 2328 13.2. Installing LSAs in the database | |
2671 | ||
2672 | Installing a new LSA in the database, either as the result of | |
2673 | flooding or a newly self-originated LSA, may cause the OSPF | |
2674 | routing table structure to be recalculated. The contents of the | |
2675 | new LSA should be compared to the old instance, if present. If | |
2676 | there is no difference, there is no need to recalculate the | |
2677 | routing table. When comparing an LSA to its previous instance, | |
2678 | the following are all considered to be differences in contents: | |
2679 | ||
2680 | o The LSA's Options field has changed. | |
2681 | ||
2682 | o One of the LSA instances has LS age set to MaxAge, and | |
2683 | the other does not. | |
2684 | ||
2685 | o The length field in the LSA header has changed. | |
2686 | ||
2687 | o The body of the LSA (i.e., anything outside the 20-byte | |
2688 | LSA header) has changed. Note that this excludes changes | |
2689 | in LS Sequence Number and LS Checksum. | |
2690 | ||
2691 | */ | |
2692 | /* Look up old LSA and determine if any SPF calculation or incremental | |
2693 | update is needed */ | |
2694 | old = ospf_lsdb_lookup (lsdb, lsa); | |
2695 | ||
2696 | /* Do comparision and record if recalc needed. */ | |
2697 | rt_recalc = 0; | |
2698 | if ( old == NULL || ospf_lsa_different(old, lsa)) | |
2699 | rt_recalc = 1; | |
2700 | ||
7ddf1d6e | 2701 | /* |
2702 | Sequence number check (Section 14.1 of rfc 2328) | |
2703 | "Premature aging is used when it is time for a self-originated | |
2704 | LSA's sequence number field to wrap. At this point, the current | |
2705 | LSA instance (having LS sequence number MaxSequenceNumber) must | |
2706 | be prematurely aged and flushed from the routing domain before a | |
2707 | new instance with sequence number equal to InitialSequenceNumber | |
2708 | can be originated. " | |
2709 | */ | |
2710 | ||
c2b478d7 | 2711 | if (ntohl(lsa->data->ls_seqnum) - 1 == OSPF_MAX_SEQUENCE_NUMBER) |
7ddf1d6e | 2712 | { |
2713 | if (ospf_lsa_is_self_originated(ospf, lsa)) | |
2714 | { | |
0c2be26c | 2715 | lsa->data->ls_seqnum = htonl(OSPF_MAX_SEQUENCE_NUMBER); |
2716 | ||
2717 | if (!IS_LSA_MAXAGE(lsa)) | |
7ddf1d6e | 2718 | lsa->flags |= OSPF_LSA_PREMATURE_AGE; |
2719 | lsa->data->ls_age = htons (OSPF_LSA_MAXAGE); | |
2720 | ||
2721 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
2722 | { | |
e588f21f | 2723 | zlog_debug ("ospf_lsa_install() Premature Aging " |
7ddf1d6e | 2724 | "lsa 0x%lx", (u_long)lsa); |
2725 | ospf_lsa_header_dump (lsa->data); | |
2726 | } | |
2727 | } | |
2728 | else | |
2729 | { | |
2730 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2731 | { | |
e588f21f | 2732 | zlog_debug ("ospf_lsa_install() got an lsa with seq 0x80000000 " |
7ddf1d6e | 2733 | "that was not self originated. Ignoring\n"); |
2734 | ospf_lsa_header_dump (lsa->data); | |
2735 | } | |
2736 | return old; | |
2737 | } | |
2738 | } | |
2739 | ||
718e3744 | 2740 | /* discard old LSA from LSDB */ |
2741 | if (old != NULL) | |
68980084 | 2742 | ospf_discard_from_db (ospf, lsdb, lsa); |
718e3744 | 2743 | |
718e3744 | 2744 | /* Calculate Checksum if self-originated?. */ |
2745 | if (IS_LSA_SELF (lsa)) | |
2746 | ospf_lsa_checksum (lsa->data); | |
2747 | ||
fe71a97d | 2748 | /* Insert LSA to LSDB. */ |
2749 | ospf_lsdb_add (lsdb, lsa); | |
2750 | lsa->lsdb = lsdb; | |
2751 | ||
718e3744 | 2752 | /* Do LSA specific installation process. */ |
2753 | switch (lsa->data->type) | |
2754 | { | |
2755 | case OSPF_ROUTER_LSA: | |
68980084 | 2756 | new = ospf_router_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2757 | break; |
2758 | case OSPF_NETWORK_LSA: | |
2759 | assert (oi); | |
68980084 | 2760 | new = ospf_network_lsa_install (ospf, oi, lsa, rt_recalc); |
718e3744 | 2761 | break; |
2762 | case OSPF_SUMMARY_LSA: | |
68980084 | 2763 | new = ospf_summary_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2764 | break; |
2765 | case OSPF_ASBR_SUMMARY_LSA: | |
68980084 | 2766 | new = ospf_summary_asbr_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2767 | break; |
2768 | case OSPF_AS_EXTERNAL_LSA: | |
68980084 | 2769 | new = ospf_external_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2770 | break; |
2771 | #ifdef HAVE_OPAQUE_LSA | |
2772 | case OSPF_OPAQUE_LINK_LSA: | |
09e4efdc | 2773 | if (IS_LSA_SELF (lsa)) |
68980084 | 2774 | lsa->oi = oi; /* Specify outgoing ospf-interface for this LSA. */ |
09e4efdc | 2775 | else |
68980084 | 2776 | ; /* Incoming "oi" for this LSA has set at LSUpd reception. */ |
09e4efdc | 2777 | /* Fallthrough */ |
718e3744 | 2778 | case OSPF_OPAQUE_AREA_LSA: |
2779 | case OSPF_OPAQUE_AS_LSA: | |
2780 | new = ospf_opaque_lsa_install (lsa, rt_recalc); | |
2781 | break; | |
2782 | #endif /* HAVE_OPAQUE_LSA */ | |
d4a53d58 | 2783 | case OSPF_AS_NSSA_LSA: |
68980084 | 2784 | new = ospf_external_lsa_install (ospf, lsa, rt_recalc); |
d4a53d58 | 2785 | default: /* type-6,8,9....nothing special */ |
718e3744 | 2786 | break; |
2787 | } | |
2788 | ||
2789 | if (new == NULL) | |
2790 | return new; /* Installation failed, cannot proceed further -- endo. */ | |
2791 | ||
2792 | /* Debug logs. */ | |
2793 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) | |
2794 | { | |
2795 | char area_str[INET_ADDRSTRLEN]; | |
2796 | ||
2797 | switch (lsa->data->type) | |
2798 | { | |
2799 | case OSPF_AS_EXTERNAL_LSA: | |
2800 | #ifdef HAVE_OPAQUE_LSA | |
2801 | case OSPF_OPAQUE_AS_LSA: | |
2802 | #endif /* HAVE_OPAQUE_LSA */ | |
beebba75 | 2803 | case OSPF_AS_NSSA_LSA: |
e588f21f | 2804 | zlog_debug ("LSA[%s]: Install %s", |
718e3744 | 2805 | dump_lsa_key (new), |
2806 | LOOKUP (ospf_lsa_type_msg, new->data->type)); | |
2807 | break; | |
2808 | default: | |
2809 | strcpy (area_str, inet_ntoa (new->area->area_id)); | |
e588f21f | 2810 | zlog_debug ("LSA[%s]: Install %s to Area %s", |
718e3744 | 2811 | dump_lsa_key (new), |
2812 | LOOKUP (ospf_lsa_type_msg, new->data->type), area_str); | |
2813 | break; | |
2814 | } | |
2815 | } | |
2816 | ||
7ddf1d6e | 2817 | /* |
2818 | If received LSA' ls_age is MaxAge, or lsa is being prematurely aged | |
2819 | (it's getting flushed out of the area), set LSA on MaxAge LSA list. | |
2820 | */ | |
2821 | if ((lsa->flags & OSPF_LSA_PREMATURE_AGE) || | |
2822 | (IS_LSA_MAXAGE (new) && !IS_LSA_SELF (new))) | |
718e3744 | 2823 | { |
7ddf1d6e | 2824 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) |
e588f21f | 2825 | zlog_debug ("LSA[Type%d:%s]: Install LSA 0x%p, MaxAge", |
0c2be26c | 2826 | new->data->type, |
2827 | inet_ntoa (new->data->id), | |
2828 | lsa); | |
68980084 | 2829 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 2830 | } |
2831 | ||
2832 | return new; | |
2833 | } | |
2834 | ||
2835 | \f | |
4dadc291 | 2836 | static int |
68980084 | 2837 | ospf_check_nbr_status (struct ospf *ospf) |
718e3744 | 2838 | { |
1eb8ef25 | 2839 | struct listnode *node, *nnode; |
2840 | struct ospf_interface *oi; | |
2841 | ||
2842 | for (ALL_LIST_ELEMENTS (ospf->oiflist, node, nnode, oi)) | |
718e3744 | 2843 | { |
718e3744 | 2844 | struct route_node *rn; |
2845 | struct ospf_neighbor *nbr; | |
2846 | ||
2847 | if (ospf_if_is_enable (oi)) | |
2848 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
2849 | if ((nbr = rn->info) != NULL) | |
2850 | if (nbr->state == NSM_Exchange || nbr->state == NSM_Loading) | |
2851 | { | |
2852 | route_unlock_node (rn); | |
2853 | return 0; | |
2854 | } | |
2855 | } | |
2856 | ||
2857 | return 1; | |
2858 | } | |
2859 | ||
2860 | \f | |
2861 | #ifdef ORIGINAL_CODING | |
2862 | /* This function flood the maxaged LSA to DR. */ | |
2863 | void | |
2864 | ospf_maxage_flood (struct ospf_lsa *lsa) | |
2865 | { | |
2866 | switch (lsa->data->type) | |
2867 | { | |
2868 | case OSPF_ROUTER_LSA: | |
2869 | case OSPF_NETWORK_LSA: | |
2870 | case OSPF_SUMMARY_LSA: | |
2871 | case OSPF_ASBR_SUMMARY_LSA: | |
718e3744 | 2872 | case OSPF_AS_NSSA_LSA: |
718e3744 | 2873 | #ifdef HAVE_OPAQUE_LSA |
2874 | case OSPF_OPAQUE_LINK_LSA: | |
2875 | case OSPF_OPAQUE_AREA_LSA: | |
2876 | #endif /* HAVE_OPAQUE_LSA */ | |
2877 | ospf_flood_through_area (lsa->area, NULL, lsa); | |
2878 | break; | |
2879 | case OSPF_AS_EXTERNAL_LSA: | |
2880 | #ifdef HAVE_OPAQUE_LSA | |
2881 | case OSPF_OPAQUE_AS_LSA: | |
2882 | #endif /* HAVE_OPAQUE_LSA */ | |
2883 | ospf_flood_through_as (NULL, lsa); | |
2884 | break; | |
2885 | default: | |
2886 | break; | |
2887 | } | |
2888 | } | |
2889 | #endif /* ORIGINAL_CODING */ | |
2890 | ||
4dadc291 | 2891 | static int |
718e3744 | 2892 | ospf_maxage_lsa_remover (struct thread *thread) |
2893 | { | |
68980084 | 2894 | struct ospf *ospf = THREAD_ARG (thread); |
1eb8ef25 | 2895 | struct ospf_lsa *lsa; |
2896 | struct listnode *node, *nnode; | |
718e3744 | 2897 | int reschedule = 0; |
2898 | ||
68980084 | 2899 | ospf->t_maxage = NULL; |
718e3744 | 2900 | |
2901 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2902 | zlog_debug ("LSA[MaxAge]: remover Start"); |
718e3744 | 2903 | |
68980084 | 2904 | reschedule = !ospf_check_nbr_status (ospf); |
718e3744 | 2905 | |
2906 | if (!reschedule) | |
1eb8ef25 | 2907 | for (ALL_LIST_ELEMENTS (ospf->maxage_lsa, node, nnode, lsa)) |
718e3744 | 2908 | { |
718e3744 | 2909 | if (lsa->retransmit_counter > 0) |
2910 | { | |
2911 | reschedule = 1; | |
2912 | continue; | |
2913 | } | |
2914 | ||
2915 | /* Remove LSA from the LSDB */ | |
f6247bf2 | 2916 | if (IS_LSA_SELF (lsa)) |
718e3744 | 2917 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) |
e588f21f | 2918 | zlog_debug ("LSA[Type%d:%s]: LSA 0x%lx is self-oririnated: ", |
7ddf1d6e | 2919 | lsa->data->type, inet_ntoa (lsa->data->id), (u_long)lsa); |
718e3744 | 2920 | |
2921 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2922 | zlog_debug ("LSA[Type%d:%s]: MaxAge LSA removed from list", |
718e3744 | 2923 | lsa->data->type, inet_ntoa (lsa->data->id)); |
2924 | ||
2925 | /* Flood max age LSA. */ | |
2926 | #ifdef ORIGINAL_CODING | |
2927 | ospf_maxage_flood (lsa); | |
2928 | #else /* ORIGINAL_CODING */ | |
68980084 | 2929 | ospf_flood_through (ospf, NULL, lsa); |
718e3744 | 2930 | #endif /* ORIGINAL_CODING */ |
2931 | ||
7ddf1d6e | 2932 | if (lsa->flags & OSPF_LSA_PREMATURE_AGE) |
2933 | { | |
2934 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2935 | zlog_debug ("originating new router lsa for lsa 0x%lx \n", |
7ddf1d6e | 2936 | (u_long)lsa); |
2937 | ospf_router_lsa_originate(lsa->area); | |
2938 | } | |
2939 | ||
718e3744 | 2940 | /* Remove from lsdb. */ |
ac904dec PJ |
2941 | if (lsa->lsdb) |
2942 | { | |
2943 | ospf_discard_from_db (ospf, lsa->lsdb, lsa); | |
2944 | ospf_lsdb_delete (lsa->lsdb, lsa); | |
2945 | } | |
2946 | else | |
2947 | zlog_warn ("%s: LSA[Type%d:%s]: No associated LSDB!", __func__, | |
2948 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
718e3744 | 2949 | } |
2950 | ||
2951 | /* A MaxAge LSA must be removed immediately from the router's link | |
2952 | state database as soon as both a) it is no longer contained on any | |
2953 | neighbor Link state retransmission lists and b) none of the router's | |
2954 | neighbors are in states Exchange or Loading. */ | |
2955 | if (reschedule) | |
68980084 | 2956 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, 2); |
718e3744 | 2957 | |
2958 | return 0; | |
2959 | } | |
2960 | ||
718e3744 | 2961 | void |
68980084 | 2962 | ospf_lsa_maxage_delete (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 2963 | { |
52dc7ee6 | 2964 | struct listnode *n; |
718e3744 | 2965 | |
68980084 | 2966 | if ((n = listnode_lookup (ospf->maxage_lsa, lsa))) |
718e3744 | 2967 | { |
68980084 | 2968 | list_delete_node (ospf->maxage_lsa, n); |
3106a032 | 2969 | UNSET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); |
1fe6ed38 | 2970 | ospf_lsa_unlock (&lsa); /* maxage_lsa */ |
718e3744 | 2971 | } |
2972 | } | |
2973 | ||
2974 | void | |
68980084 | 2975 | ospf_lsa_maxage (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 2976 | { |
2977 | /* When we saw a MaxAge LSA flooded to us, we put it on the list | |
2978 | and schedule the MaxAge LSA remover. */ | |
3106a032 | 2979 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE)) |
718e3744 | 2980 | { |
2981 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2982 | zlog_debug ("LSA[Type%d:%s]: %p already exists on MaxAge LSA list", |
718e3744 | 2983 | lsa->data->type, inet_ntoa (lsa->data->id), lsa); |
2984 | return; | |
2985 | } | |
2986 | ||
68980084 | 2987 | listnode_add (ospf->maxage_lsa, ospf_lsa_lock (lsa)); |
3106a032 | 2988 | SET_FLAG(lsa->flags, OSPF_LSA_IN_MAXAGE); |
718e3744 | 2989 | |
2990 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2991 | zlog_debug ("LSA[%s]: MaxAge LSA remover scheduled.", dump_lsa_key (lsa)); |
718e3744 | 2992 | |
68980084 | 2993 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, 2); |
718e3744 | 2994 | } |
2995 | ||
4dadc291 | 2996 | static int |
68980084 | 2997 | ospf_lsa_maxage_walker_remover (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 2998 | { |
718e3744 | 2999 | /* Stay away from any Local Translated Type-7 LSAs */ |
3000 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
3001 | return 0; | |
718e3744 | 3002 | |
3003 | if (IS_LSA_MAXAGE (lsa)) | |
3004 | /* Self-originated LSAs should NOT time-out instead, | |
3005 | they're flushed and submitted to the max_age list explicitly. */ | |
68980084 | 3006 | if (!ospf_lsa_is_self_originated (ospf, lsa)) |
718e3744 | 3007 | { |
3008 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 3009 | zlog_debug("LSA[%s]: is MaxAge", dump_lsa_key (lsa)); |
718e3744 | 3010 | |
3011 | switch (lsa->data->type) | |
3012 | { | |
718e3744 | 3013 | #ifdef HAVE_OPAQUE_LSA |
37163d6d | 3014 | case OSPF_OPAQUE_LINK_LSA: |
3015 | case OSPF_OPAQUE_AREA_LSA: | |
718e3744 | 3016 | case OSPF_OPAQUE_AS_LSA: |
09e4efdc | 3017 | /* |
3018 | * As a general rule, whenever network topology has changed | |
3019 | * (due to an LSA removal in this case), routing recalculation | |
3020 | * should be triggered. However, this is not true for opaque | |
3021 | * LSAs. Even if an opaque LSA instance is going to be removed | |
3022 | * from the routing domain, it does not mean a change in network | |
3023 | * topology, and thus, routing recalculation is not needed here. | |
3024 | */ | |
3025 | break; | |
718e3744 | 3026 | #endif /* HAVE_OPAQUE_LSA */ |
09e4efdc | 3027 | case OSPF_AS_EXTERNAL_LSA: |
beebba75 | 3028 | case OSPF_AS_NSSA_LSA: |
68980084 | 3029 | ospf_ase_incremental_update (ospf, lsa); |
3030 | break; | |
718e3744 | 3031 | default: |
68980084 | 3032 | ospf_spf_calculate_schedule (ospf); |
3033 | break; | |
718e3744 | 3034 | } |
68980084 | 3035 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 3036 | } |
3037 | ||
3038 | return 0; | |
3039 | } | |
3040 | ||
3041 | /* Periodical check of MaxAge LSA. */ | |
3042 | int | |
68980084 | 3043 | ospf_lsa_maxage_walker (struct thread *thread) |
718e3744 | 3044 | { |
68980084 | 3045 | struct ospf *ospf = THREAD_ARG (thread); |
3046 | struct route_node *rn; | |
3047 | struct ospf_lsa *lsa; | |
1eb8ef25 | 3048 | struct ospf_area *area; |
3049 | struct listnode *node, *nnode; | |
718e3744 | 3050 | |
68980084 | 3051 | ospf->t_maxage_walker = NULL; |
718e3744 | 3052 | |
1eb8ef25 | 3053 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 3054 | { |
68980084 | 3055 | LSDB_LOOP (ROUTER_LSDB (area), rn, lsa) |
3056 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3057 | LSDB_LOOP (NETWORK_LSDB (area), rn, lsa) | |
3058 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3059 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) | |
3060 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3061 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
3062 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3063 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3064 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) |
3065 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3066 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) | |
3067 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3068 | #endif /* HAVE_OPAQUE_LSA */ |
4fb949e3 | 3069 | LSDB_LOOP (NSSA_LSDB (area), rn, lsa) |
3070 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3071 | } |
3072 | ||
4fb949e3 | 3073 | /* for AS-external-LSAs. */ |
68980084 | 3074 | if (ospf->lsdb) |
3075 | { | |
3076 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) | |
3077 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3078 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3079 | LSDB_LOOP (OPAQUE_AS_LSDB (ospf), rn, lsa) |
3080 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3081 | #endif /* HAVE_OPAQUE_LSA */ |
68980084 | 3082 | } |
718e3744 | 3083 | |
68980084 | 3084 | OSPF_TIMER_ON (ospf->t_maxage_walker, ospf_lsa_maxage_walker, |
3085 | OSPF_LSA_MAXAGE_CHECK_INTERVAL); | |
718e3744 | 3086 | return 0; |
3087 | } | |
3088 | ||
68980084 | 3089 | struct ospf_lsa * |
3090 | ospf_lsa_lookup_by_prefix (struct ospf_lsdb *lsdb, u_char type, | |
3091 | struct prefix_ipv4 *p, struct in_addr router_id) | |
718e3744 | 3092 | { |
68980084 | 3093 | struct ospf_lsa *lsa; |
3094 | struct in_addr mask, id; | |
3095 | struct lsa_header_mask | |
3096 | { | |
3097 | struct lsa_header header; | |
3098 | struct in_addr mask; | |
3099 | } *hmask; | |
718e3744 | 3100 | |
68980084 | 3101 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, p->prefix, router_id); |
3102 | if (lsa == NULL) | |
3103 | return NULL; | |
718e3744 | 3104 | |
68980084 | 3105 | masklen2ip (p->prefixlen, &mask); |
718e3744 | 3106 | |
68980084 | 3107 | hmask = (struct lsa_header_mask *) lsa->data; |
718e3744 | 3108 | |
68980084 | 3109 | if (mask.s_addr != hmask->mask.s_addr) |
3110 | { | |
3111 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
3112 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, id, router_id); | |
3113 | if (!lsa) | |
3114 | return NULL; | |
3115 | } | |
718e3744 | 3116 | |
68980084 | 3117 | return lsa; |
718e3744 | 3118 | } |
3119 | ||
3120 | struct ospf_lsa * | |
3121 | ospf_lsa_lookup (struct ospf_area *area, u_int32_t type, | |
3122 | struct in_addr id, struct in_addr adv_router) | |
3123 | { | |
e05fba43 | 3124 | struct ospf *ospf = ospf_lookup(); |
3125 | assert(ospf); | |
3126 | ||
718e3744 | 3127 | switch (type) |
3128 | { | |
3129 | case OSPF_ROUTER_LSA: | |
3130 | case OSPF_NETWORK_LSA: | |
3131 | case OSPF_SUMMARY_LSA: | |
3132 | case OSPF_ASBR_SUMMARY_LSA: | |
718e3744 | 3133 | case OSPF_AS_NSSA_LSA: |
718e3744 | 3134 | #ifdef HAVE_OPAQUE_LSA |
3135 | case OSPF_OPAQUE_LINK_LSA: | |
3136 | case OSPF_OPAQUE_AREA_LSA: | |
3137 | #endif /* HAVE_OPAQUE_LSA */ | |
3138 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, adv_router); | |
718e3744 | 3139 | case OSPF_AS_EXTERNAL_LSA: |
3140 | #ifdef HAVE_OPAQUE_LSA | |
3141 | case OSPF_OPAQUE_AS_LSA: | |
3142 | #endif /* HAVE_OPAQUE_LSA */ | |
e05fba43 | 3143 | return ospf_lsdb_lookup_by_id (ospf->lsdb, type, id, adv_router); |
718e3744 | 3144 | default: |
3145 | break; | |
3146 | } | |
3147 | ||
3148 | return NULL; | |
3149 | } | |
3150 | ||
3151 | struct ospf_lsa * | |
3152 | ospf_lsa_lookup_by_id (struct ospf_area *area, u_int32_t type, | |
3153 | struct in_addr id) | |
3154 | { | |
3155 | struct ospf_lsa *lsa; | |
3156 | struct route_node *rn; | |
3157 | ||
3158 | switch (type) | |
3159 | { | |
3160 | case OSPF_ROUTER_LSA: | |
3161 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, id); | |
718e3744 | 3162 | case OSPF_NETWORK_LSA: |
3163 | for (rn = route_top (NETWORK_LSDB (area)); rn; rn = route_next (rn)) | |
3164 | if ((lsa = rn->info)) | |
3165 | if (IPV4_ADDR_SAME (&lsa->data->id, &id)) | |
3166 | { | |
3167 | route_unlock_node (rn); | |
3168 | return lsa; | |
3169 | } | |
3170 | break; | |
3171 | case OSPF_SUMMARY_LSA: | |
3172 | case OSPF_ASBR_SUMMARY_LSA: | |
3173 | /* Currently not used. */ | |
3174 | assert (1); | |
3175 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, id); | |
718e3744 | 3176 | case OSPF_AS_EXTERNAL_LSA: |
d4a53d58 | 3177 | case OSPF_AS_NSSA_LSA: |
718e3744 | 3178 | #ifdef HAVE_OPAQUE_LSA |
3179 | case OSPF_OPAQUE_LINK_LSA: | |
3180 | case OSPF_OPAQUE_AREA_LSA: | |
3181 | case OSPF_OPAQUE_AS_LSA: | |
3182 | /* Currently not used. */ | |
3183 | break; | |
3184 | #endif /* HAVE_OPAQUE_LSA */ | |
3185 | default: | |
3186 | break; | |
3187 | } | |
3188 | ||
3189 | return NULL; | |
3190 | } | |
3191 | ||
3192 | struct ospf_lsa * | |
3193 | ospf_lsa_lookup_by_header (struct ospf_area *area, struct lsa_header *lsah) | |
3194 | { | |
3195 | struct ospf_lsa *match; | |
3196 | ||
3197 | #ifdef HAVE_OPAQUE_LSA | |
3198 | /* | |
3199 | * Strictly speaking, the LSA-ID field for Opaque-LSAs (type-9/10/11) | |
3200 | * is redefined to have two subfields; opaque-type and opaque-id. | |
3201 | * However, it is harmless to treat the two sub fields together, as if | |
3202 | * they two were forming a unique LSA-ID. | |
3203 | */ | |
3204 | #endif /* HAVE_OPAQUE_LSA */ | |
3205 | ||
3206 | match = ospf_lsa_lookup (area, lsah->type, lsah->id, lsah->adv_router); | |
3207 | ||
3208 | if (match == NULL) | |
3209 | if (IS_DEBUG_OSPF (lsa, LSA) == OSPF_DEBUG_LSA) | |
e588f21f | 3210 | zlog_debug ("LSA[Type%d:%s]: Lookup by header, NO MATCH", |
718e3744 | 3211 | lsah->type, inet_ntoa (lsah->id)); |
3212 | ||
3213 | return match; | |
3214 | } | |
3215 | ||
3216 | /* return +n, l1 is more recent. | |
3217 | return -n, l2 is more recent. | |
3218 | return 0, l1 and l2 is identical. */ | |
3219 | int | |
3220 | ospf_lsa_more_recent (struct ospf_lsa *l1, struct ospf_lsa *l2) | |
3221 | { | |
3222 | int r; | |
3223 | int x, y; | |
3224 | ||
3225 | if (l1 == NULL && l2 == NULL) | |
3226 | return 0; | |
3227 | if (l1 == NULL) | |
3228 | return -1; | |
3229 | if (l2 == NULL) | |
3230 | return 1; | |
3231 | ||
3232 | /* compare LS sequence number. */ | |
3233 | x = (int) ntohl (l1->data->ls_seqnum); | |
3234 | y = (int) ntohl (l2->data->ls_seqnum); | |
3235 | if (x > y) | |
3236 | return 1; | |
3237 | if (x < y) | |
3238 | return -1; | |
3239 | ||
3240 | /* compare LS checksum. */ | |
3241 | r = ntohs (l1->data->checksum) - ntohs (l2->data->checksum); | |
3242 | if (r) | |
3243 | return r; | |
3244 | ||
3245 | /* compare LS age. */ | |
3246 | if (IS_LSA_MAXAGE (l1) && !IS_LSA_MAXAGE (l2)) | |
3247 | return 1; | |
3248 | else if (!IS_LSA_MAXAGE (l1) && IS_LSA_MAXAGE (l2)) | |
3249 | return -1; | |
3250 | ||
3251 | /* compare LS age with MaxAgeDiff. */ | |
3252 | if (LS_AGE (l1) - LS_AGE (l2) > OSPF_LSA_MAXAGE_DIFF) | |
3253 | return -1; | |
3254 | else if (LS_AGE (l2) - LS_AGE (l1) > OSPF_LSA_MAXAGE_DIFF) | |
3255 | return 1; | |
3256 | ||
3257 | /* LSAs are identical. */ | |
3258 | return 0; | |
3259 | } | |
3260 | ||
3261 | /* If two LSAs are different, return 1, otherwise return 0. */ | |
3262 | int | |
3263 | ospf_lsa_different (struct ospf_lsa *l1, struct ospf_lsa *l2) | |
3264 | { | |
3265 | char *p1, *p2; | |
3266 | assert (l1); | |
3267 | assert (l2); | |
3268 | assert (l1->data); | |
3269 | assert (l2->data); | |
3270 | ||
3271 | if (l1->data->options != l2->data->options) | |
3272 | return 1; | |
3273 | ||
3274 | if (IS_LSA_MAXAGE (l1) && !IS_LSA_MAXAGE (l2)) | |
3275 | return 1; | |
3276 | ||
3277 | if (IS_LSA_MAXAGE (l2) && !IS_LSA_MAXAGE (l1)) | |
3278 | return 1; | |
3279 | ||
3280 | if (l1->data->length != l2->data->length) | |
3281 | return 1; | |
3282 | ||
3283 | if (l1->data->length == 0) | |
3284 | return 1; | |
3285 | ||
5996e0df JT |
3286 | if (CHECK_FLAG ((l1->flags ^ l2->flags), OSPF_LSA_RECEIVED)) |
3287 | return 1; /* May be a stale LSA in the LSBD */ | |
3288 | ||
d1825830 | 3289 | assert ( ntohs(l1->data->length) > OSPF_LSA_HEADER_SIZE); |
718e3744 | 3290 | |
3291 | p1 = (char *) l1->data; | |
3292 | p2 = (char *) l2->data; | |
3293 | ||
3294 | if (memcmp (p1 + OSPF_LSA_HEADER_SIZE, p2 + OSPF_LSA_HEADER_SIZE, | |
3295 | ntohs( l1->data->length ) - OSPF_LSA_HEADER_SIZE) != 0) | |
3296 | return 1; | |
3297 | ||
3298 | return 0; | |
3299 | } | |
3300 | ||
3301 | #ifdef ORIGINAL_CODING | |
3302 | void | |
3303 | ospf_lsa_flush_self_originated (struct ospf_neighbor *nbr, | |
3304 | struct ospf_lsa *self, | |
3305 | struct ospf_lsa *new) | |
3306 | { | |
3307 | u_int32_t seqnum; | |
3308 | ||
3309 | /* Adjust LS Sequence Number. */ | |
3310 | seqnum = ntohl (new->data->ls_seqnum) + 1; | |
3311 | self->data->ls_seqnum = htonl (seqnum); | |
3312 | ||
3313 | /* Recalculate LSA checksum. */ | |
3314 | ospf_lsa_checksum (self->data); | |
3315 | ||
3316 | /* Reflooding LSA. */ | |
3317 | /* RFC2328 Section 13.3 | |
3318 | On non-broadcast networks, separate Link State Update | |
3319 | packets must be sent, as unicasts, to each adjacent neighbor | |
3320 | (i.e., those in state Exchange or greater). The destination | |
3321 | IP addresses for these packets are the neighbors' IP | |
3322 | addresses. */ | |
3323 | if (nbr->oi->type == OSPF_IFTYPE_NBMA) | |
3324 | { | |
3325 | struct route_node *rn; | |
3326 | struct ospf_neighbor *onbr; | |
3327 | ||
3328 | for (rn = route_top (nbr->oi->nbrs); rn; rn = route_next (rn)) | |
3329 | if ((onbr = rn->info) != NULL) | |
3330 | if (onbr != nbr->oi->nbr_self && onbr->status >= NSM_Exchange) | |
3331 | ospf_ls_upd_send_lsa (onbr, self, OSPF_SEND_PACKET_DIRECT); | |
3332 | } | |
3333 | else | |
3334 | ospf_ls_upd_send_lsa (nbr, self, OSPF_SEND_PACKET_INDIRECT); | |
3335 | ||
3336 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3337 | zlog_debug ("LSA[Type%d:%s]: Flush self-originated LSA", |
718e3744 | 3338 | self->data->type, inet_ntoa (self->data->id)); |
3339 | } | |
3340 | #else /* ORIGINAL_CODING */ | |
3341 | static int | |
68980084 | 3342 | ospf_lsa_flush_schedule (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3343 | { |
3344 | if (lsa == NULL || !IS_LSA_SELF (lsa)) | |
3345 | return 0; | |
3346 | ||
3347 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 3348 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", lsa->data->type, inet_ntoa (lsa->data->id)); |
718e3744 | 3349 | |
3350 | /* Force given lsa's age to MaxAge. */ | |
3351 | lsa->data->ls_age = htons (OSPF_LSA_MAXAGE); | |
3352 | ||
3353 | switch (lsa->data->type) | |
3354 | { | |
3355 | #ifdef HAVE_OPAQUE_LSA | |
3356 | case OSPF_OPAQUE_LINK_LSA: | |
3357 | case OSPF_OPAQUE_AREA_LSA: | |
3358 | case OSPF_OPAQUE_AS_LSA: | |
3359 | ospf_opaque_lsa_refresh (lsa); | |
3360 | break; | |
3361 | #endif /* HAVE_OPAQUE_LSA */ | |
3362 | default: | |
68980084 | 3363 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 3364 | break; |
3365 | } | |
3366 | ||
3367 | return 0; | |
3368 | } | |
3369 | ||
3370 | void | |
68980084 | 3371 | ospf_flush_self_originated_lsas_now (struct ospf *ospf) |
718e3744 | 3372 | { |
1eb8ef25 | 3373 | struct listnode *node, *nnode; |
3374 | struct listnode *node2, *nnode2; | |
718e3744 | 3375 | struct ospf_area *area; |
3376 | struct ospf_interface *oi; | |
3377 | struct ospf_lsa *lsa; | |
68980084 | 3378 | struct route_node *rn; |
718e3744 | 3379 | int need_to_flush_ase = 0; |
3380 | ||
1eb8ef25 | 3381 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 3382 | { |
718e3744 | 3383 | if ((lsa = area->router_lsa_self) != NULL) |
3384 | { | |
3385 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 3386 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", lsa->data->type, inet_ntoa (lsa->data->id)); |
718e3744 | 3387 | |
3388 | ospf_lsa_flush_area (lsa, area); | |
1fe6ed38 | 3389 | ospf_lsa_unlock (&area->router_lsa_self); |
718e3744 | 3390 | area->router_lsa_self = NULL; |
3391 | OSPF_TIMER_OFF (area->t_router_lsa_self); | |
3392 | } | |
3393 | ||
1eb8ef25 | 3394 | for (ALL_LIST_ELEMENTS (area->oiflist, node2, nnode2, oi)) |
718e3744 | 3395 | { |
718e3744 | 3396 | if ((lsa = oi->network_lsa_self) != NULL |
1eb8ef25 | 3397 | && oi->state == ISM_DR |
3398 | && oi->full_nbrs > 0) | |
718e3744 | 3399 | { |
3400 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 3401 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", lsa->data->type, inet_ntoa (lsa->data->id)); |
718e3744 | 3402 | |
3403 | ospf_lsa_flush_area (oi->network_lsa_self, area); | |
1fe6ed38 | 3404 | ospf_lsa_unlock (&oi->network_lsa_self); |
718e3744 | 3405 | oi->network_lsa_self = NULL; |
3406 | OSPF_TIMER_OFF (oi->t_network_lsa_self); | |
3407 | } | |
3408 | ||
3409 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK | |
3410 | && area->external_routing == OSPF_AREA_DEFAULT) | |
3411 | need_to_flush_ase = 1; | |
3412 | } | |
3413 | ||
68980084 | 3414 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) |
3415 | ospf_lsa_flush_schedule (ospf, lsa); | |
3416 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
3417 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3418 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3419 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) |
3420 | ospf_lsa_flush_schedule (ospf, lsa); | |
3421 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) | |
3422 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3423 | #endif /* HAVE_OPAQUE_LSA */ |
3424 | } | |
3425 | ||
3426 | if (need_to_flush_ase) | |
3427 | { | |
68980084 | 3428 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) |
3429 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3430 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3431 | LSDB_LOOP (OPAQUE_AS_LSDB (ospf), rn, lsa) |
3432 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3433 | #endif /* HAVE_OPAQUE_LSA */ |
3434 | } | |
3435 | ||
3436 | /* | |
3437 | * Make sure that the MaxAge LSA remover is executed immediately, | |
3438 | * without conflicting to other threads. | |
3439 | */ | |
68980084 | 3440 | if (ospf->t_maxage != NULL) |
718e3744 | 3441 | { |
68980084 | 3442 | OSPF_TIMER_OFF (ospf->t_maxage); |
3443 | thread_execute (master, ospf_maxage_lsa_remover, ospf, 0); | |
718e3744 | 3444 | } |
3445 | ||
3446 | return; | |
3447 | } | |
3448 | #endif /* ORIGINAL_CODING */ | |
3449 | ||
3450 | /* If there is self-originated LSA, then return 1, otherwise return 0. */ | |
3451 | /* An interface-independent version of ospf_lsa_is_self_originated */ | |
3452 | int | |
68980084 | 3453 | ospf_lsa_is_self_originated (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3454 | { |
52dc7ee6 | 3455 | struct listnode *node; |
1eb8ef25 | 3456 | struct ospf_interface *oi; |
718e3744 | 3457 | |
3458 | /* This LSA is already checked. */ | |
3459 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF_CHECKED)) | |
f6247bf2 | 3460 | return IS_LSA_SELF (lsa); |
718e3744 | 3461 | |
3462 | /* Make sure LSA is self-checked. */ | |
3463 | SET_FLAG (lsa->flags, OSPF_LSA_SELF_CHECKED); | |
3464 | ||
3465 | /* AdvRouter and Router ID is the same. */ | |
68980084 | 3466 | if (IPV4_ADDR_SAME (&lsa->data->adv_router, &ospf->router_id)) |
718e3744 | 3467 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); |
3468 | ||
3469 | /* LSA is router-LSA. */ | |
3470 | else if (lsa->data->type == OSPF_ROUTER_LSA && | |
68980084 | 3471 | IPV4_ADDR_SAME (&lsa->data->id, &ospf->router_id)) |
718e3744 | 3472 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); |
3473 | ||
3474 | /* LSA is network-LSA. Compare Link ID with all interfaces. */ | |
3475 | else if (lsa->data->type == OSPF_NETWORK_LSA) | |
1eb8ef25 | 3476 | for (ALL_LIST_ELEMENTS_RO (ospf->oiflist, node, oi)) |
718e3744 | 3477 | { |
718e3744 | 3478 | /* Ignore virtual link. */ |
3479 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
3480 | if (oi->address->family == AF_INET) | |
3481 | if (IPV4_ADDR_SAME (&lsa->data->id, &oi->address->u.prefix4)) | |
3482 | { | |
3483 | /* to make it easier later */ | |
3484 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); | |
f6247bf2 | 3485 | return IS_LSA_SELF (lsa); |
718e3744 | 3486 | } |
3487 | } | |
3488 | ||
f6247bf2 | 3489 | return IS_LSA_SELF (lsa); |
718e3744 | 3490 | } |
3491 | ||
3492 | /* Get unique Link State ID. */ | |
3493 | struct in_addr | |
68980084 | 3494 | ospf_lsa_unique_id (struct ospf *ospf, |
3495 | struct ospf_lsdb *lsdb, u_char type, struct prefix_ipv4 *p) | |
718e3744 | 3496 | { |
3497 | struct ospf_lsa *lsa; | |
3498 | struct in_addr mask, id; | |
3499 | ||
3500 | id = p->prefix; | |
3501 | ||
3502 | /* Check existence of LSA instance. */ | |
68980084 | 3503 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, id, ospf->router_id); |
718e3744 | 3504 | if (lsa) |
3505 | { | |
3506 | struct as_external_lsa *al = (struct as_external_lsa *) lsa->data; | |
3507 | if (ip_masklen (al->mask) == p->prefixlen) | |
3508 | { | |
3509 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3510 | zlog_debug ("ospf_lsa_unique_id(): " |
718e3744 | 3511 | "Can't get Link State ID for %s/%d", |
3512 | inet_ntoa (p->prefix), p->prefixlen); | |
3513 | /* id.s_addr = 0; */ | |
3514 | id.s_addr = 0xffffffff; | |
3515 | return id; | |
3516 | } | |
3517 | /* Masklen differs, then apply wildcard mask to Link State ID. */ | |
3518 | else | |
3519 | { | |
3520 | masklen2ip (p->prefixlen, &mask); | |
3521 | ||
3522 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
68980084 | 3523 | lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, type, |
3524 | id, ospf->router_id); | |
718e3744 | 3525 | if (lsa) |
3526 | { | |
3527 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3528 | zlog_debug ("ospf_lsa_unique_id(): " |
718e3744 | 3529 | "Can't get Link State ID for %s/%d", |
3530 | inet_ntoa (p->prefix), p->prefixlen); | |
3531 | /* id.s_addr = 0; */ | |
3532 | id.s_addr = 0xffffffff; | |
3533 | return id; | |
3534 | } | |
3535 | } | |
3536 | } | |
3537 | ||
3538 | return id; | |
3539 | } | |
3540 | ||
3541 | \f | |
70461d79 PJ |
3542 | #define LSA_ACTION_FLOOD_AREA 1 |
3543 | #define LSA_ACTION_FLUSH_AREA 2 | |
718e3744 | 3544 | |
3545 | struct lsa_action | |
3546 | { | |
3547 | u_char action; | |
3548 | struct ospf_area *area; | |
718e3744 | 3549 | struct ospf_lsa *lsa; |
3550 | }; | |
3551 | ||
4dadc291 | 3552 | static int |
718e3744 | 3553 | ospf_lsa_action (struct thread *t) |
3554 | { | |
3555 | struct lsa_action *data; | |
3556 | ||
3557 | data = THREAD_ARG (t); | |
3558 | ||
3559 | if (IS_DEBUG_OSPF (lsa, LSA) == OSPF_DEBUG_LSA) | |
e588f21f | 3560 | zlog_debug ("LSA[Action]: Performing scheduled LSA action: %d", |
718e3744 | 3561 | data->action); |
3562 | ||
3563 | switch (data->action) | |
3564 | { | |
718e3744 | 3565 | case LSA_ACTION_FLOOD_AREA: |
3566 | ospf_flood_through_area (data->area, NULL, data->lsa); | |
3567 | break; | |
718e3744 | 3568 | case LSA_ACTION_FLUSH_AREA: |
3569 | ospf_lsa_flush_area (data->lsa, data->area); | |
3570 | break; | |
718e3744 | 3571 | } |
3572 | ||
1fe6ed38 | 3573 | ospf_lsa_unlock (&data->lsa); /* Message */ |
718e3744 | 3574 | XFREE (MTYPE_OSPF_MESSAGE, data); |
3575 | return 0; | |
3576 | } | |
3577 | ||
3578 | void | |
3579 | ospf_schedule_lsa_flood_area (struct ospf_area *area, struct ospf_lsa *lsa) | |
3580 | { | |
3581 | struct lsa_action *data; | |
3582 | ||
393deb9b | 3583 | data = XCALLOC (MTYPE_OSPF_MESSAGE, sizeof (struct lsa_action)); |
718e3744 | 3584 | data->action = LSA_ACTION_FLOOD_AREA; |
3585 | data->area = area; | |
1fe6ed38 | 3586 | data->lsa = ospf_lsa_lock (lsa); /* Message / Flood area */ |
718e3744 | 3587 | |
3588 | thread_add_event (master, ospf_lsa_action, data, 0); | |
3589 | } | |
3590 | ||
3591 | void | |
3592 | ospf_schedule_lsa_flush_area (struct ospf_area *area, struct ospf_lsa *lsa) | |
3593 | { | |
3594 | struct lsa_action *data; | |
3595 | ||
393deb9b | 3596 | data = XCALLOC (MTYPE_OSPF_MESSAGE, sizeof (struct lsa_action)); |
718e3744 | 3597 | data->action = LSA_ACTION_FLUSH_AREA; |
3598 | data->area = area; | |
1fe6ed38 | 3599 | data->lsa = ospf_lsa_lock (lsa); /* Message / Flush area */ |
718e3744 | 3600 | |
3601 | thread_add_event (master, ospf_lsa_action, data, 0); | |
3602 | } | |
3603 | ||
3604 | \f | |
3605 | /* LSA Refreshment functions. */ | |
4dadc291 | 3606 | static void |
68980084 | 3607 | ospf_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3608 | { |
3609 | struct external_info *ei; | |
f6247bf2 | 3610 | assert (IS_LSA_SELF (lsa)); |
718e3744 | 3611 | |
3612 | switch (lsa->data->type) | |
3613 | { | |
3614 | /* Router and Network LSAs are processed differently. */ | |
3615 | case OSPF_ROUTER_LSA: | |
3616 | case OSPF_NETWORK_LSA: | |
3617 | break; | |
3618 | case OSPF_SUMMARY_LSA: | |
68980084 | 3619 | ospf_summary_lsa_refresh (ospf, lsa); |
718e3744 | 3620 | break; |
3621 | case OSPF_ASBR_SUMMARY_LSA: | |
68980084 | 3622 | ospf_summary_asbr_lsa_refresh (ospf, lsa); |
718e3744 | 3623 | break; |
3624 | case OSPF_AS_EXTERNAL_LSA: | |
d4a53d58 | 3625 | /* Translated from NSSA Type-5s are refreshed when |
3626 | * from refresh of Type-7 - do not refresh these directly. | |
3627 | */ | |
3628 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
3629 | break; | |
718e3744 | 3630 | ei = ospf_external_info_check (lsa); |
3631 | if (ei) | |
d4a53d58 | 3632 | ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_FORCE); |
718e3744 | 3633 | else |
d4a53d58 | 3634 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 3635 | break; |
3636 | #ifdef HAVE_OPAQUE_LSA | |
3637 | case OSPF_OPAQUE_LINK_LSA: | |
3638 | case OSPF_OPAQUE_AREA_LSA: | |
3639 | case OSPF_OPAQUE_AS_LSA: | |
3640 | ospf_opaque_lsa_refresh (lsa); | |
3641 | break; | |
d748032f | 3642 | #endif /* HAVE_OPAQUE_LSA */ |
718e3744 | 3643 | default: |
3644 | break; | |
718e3744 | 3645 | } |
3646 | } | |
3647 | ||
3648 | void | |
68980084 | 3649 | ospf_refresher_register_lsa (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3650 | { |
3651 | u_int16_t index, current_index; | |
3652 | ||
f6247bf2 | 3653 | assert (IS_LSA_SELF (lsa)); |
718e3744 | 3654 | |
3655 | if (lsa->refresh_list < 0) | |
3656 | { | |
3657 | int delay; | |
3658 | ||
3659 | if (LS_AGE (lsa) == 0 && | |
3660 | ntohl (lsa->data->ls_seqnum) == OSPF_INITIAL_SEQUENCE_NUMBER) | |
3661 | /* Randomize first update by OSPF_LS_REFRESH_SHIFT factor */ | |
3662 | delay = OSPF_LS_REFRESH_SHIFT + (random () % OSPF_LS_REFRESH_TIME); | |
3663 | else | |
3664 | /* Randomize another updates by +-OSPF_LS_REFRESH_JITTER factor */ | |
3665 | delay = OSPF_LS_REFRESH_TIME - LS_AGE (lsa) - OSPF_LS_REFRESH_JITTER | |
3666 | + (random () % (2*OSPF_LS_REFRESH_JITTER)); | |
3667 | ||
3668 | if (delay < 0) | |
3669 | delay = 0; | |
3670 | ||
68980084 | 3671 | current_index = ospf->lsa_refresh_queue.index + |
2518efd1 | 3672 | (quagga_time (NULL) - ospf->lsa_refresher_started)/OSPF_LSA_REFRESHER_GRANULARITY; |
718e3744 | 3673 | |
3674 | index = (current_index + delay/OSPF_LSA_REFRESHER_GRANULARITY) | |
3675 | % (OSPF_LSA_REFRESHER_SLOTS); | |
3676 | ||
3677 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3678 | zlog_debug ("LSA[Refresh]: lsa %s with age %d added to index %d", |
d4a53d58 | 3679 | inet_ntoa (lsa->data->id), LS_AGE (lsa), index); |
68980084 | 3680 | if (!ospf->lsa_refresh_queue.qs[index]) |
3681 | ospf->lsa_refresh_queue.qs[index] = list_new (); | |
1fe6ed38 PJ |
3682 | listnode_add (ospf->lsa_refresh_queue.qs[index], |
3683 | ospf_lsa_lock (lsa)); /* lsa_refresh_queue */ | |
718e3744 | 3684 | lsa->refresh_list = index; |
f2c80652 | 3685 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) |
e588f21f | 3686 | zlog_debug ("LSA[Refresh:%s]: ospf_refresher_register_lsa(): " |
5c8d16fd | 3687 | "setting refresh_list on lsa %p (index %u)", |
d4a53d58 | 3688 | inet_ntoa (lsa->data->id), lsa, index); |
718e3744 | 3689 | } |
3690 | } | |
3691 | ||
3692 | void | |
68980084 | 3693 | ospf_refresher_unregister_lsa (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3694 | { |
f6247bf2 | 3695 | assert (IS_LSA_SELF (lsa)); |
718e3744 | 3696 | if (lsa->refresh_list >= 0) |
3697 | { | |
52dc7ee6 | 3698 | struct list *refresh_list = ospf->lsa_refresh_queue.qs[lsa->refresh_list]; |
718e3744 | 3699 | listnode_delete (refresh_list, lsa); |
3700 | if (!listcount (refresh_list)) | |
3701 | { | |
3702 | list_free (refresh_list); | |
68980084 | 3703 | ospf->lsa_refresh_queue.qs[lsa->refresh_list] = NULL; |
718e3744 | 3704 | } |
1fe6ed38 | 3705 | ospf_lsa_unlock (&lsa); /* lsa_refresh_queue */ |
718e3744 | 3706 | lsa->refresh_list = -1; |
3707 | } | |
3708 | } | |
3709 | ||
3710 | int | |
3711 | ospf_lsa_refresh_walker (struct thread *t) | |
3712 | { | |
52dc7ee6 | 3713 | struct list *refresh_list; |
1eb8ef25 | 3714 | struct listnode *node, *nnode; |
68980084 | 3715 | struct ospf *ospf = THREAD_ARG (t); |
1eb8ef25 | 3716 | struct ospf_lsa *lsa; |
718e3744 | 3717 | int i; |
52dc7ee6 | 3718 | struct list *lsa_to_refresh = list_new (); |
718e3744 | 3719 | |
3720 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3721 | zlog_debug ("LSA[Refresh]:ospf_lsa_refresh_walker(): start"); |
718e3744 | 3722 | |
3723 | ||
68980084 | 3724 | i = ospf->lsa_refresh_queue.index; |
718e3744 | 3725 | |
9dbc7972 | 3726 | /* Note: if clock has jumped backwards, then time change could be negative, |
3727 | so we are careful to cast the expression to unsigned before taking | |
3728 | modulus. */ | |
68980084 | 3729 | ospf->lsa_refresh_queue.index = |
9dbc7972 | 3730 | ((unsigned long)(ospf->lsa_refresh_queue.index + |
2518efd1 | 3731 | (quagga_time (NULL) - ospf->lsa_refresher_started) / |
9dbc7972 | 3732 | OSPF_LSA_REFRESHER_GRANULARITY)) % OSPF_LSA_REFRESHER_SLOTS; |
718e3744 | 3733 | |
3734 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3735 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): next index %d", |
68980084 | 3736 | ospf->lsa_refresh_queue.index); |
718e3744 | 3737 | |
68980084 | 3738 | for (;i != ospf->lsa_refresh_queue.index; |
718e3744 | 3739 | i = (i + 1) % OSPF_LSA_REFRESHER_SLOTS) |
3740 | { | |
3741 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3742 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): " |
d4a53d58 | 3743 | "refresh index %d", i); |
718e3744 | 3744 | |
68980084 | 3745 | refresh_list = ospf->lsa_refresh_queue.qs [i]; |
718e3744 | 3746 | |
68980084 | 3747 | ospf->lsa_refresh_queue.qs [i] = NULL; |
3748 | ||
718e3744 | 3749 | if (refresh_list) |
3750 | { | |
1eb8ef25 | 3751 | for (ALL_LIST_ELEMENTS (refresh_list, node, nnode, lsa)) |
718e3744 | 3752 | { |
718e3744 | 3753 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) |
e588f21f | 3754 | zlog_debug ("LSA[Refresh:%s]: ospf_lsa_refresh_walker(): " |
d4a53d58 | 3755 | "refresh lsa %p (slot %d)", |
3756 | inet_ntoa (lsa->data->id), lsa, i); | |
718e3744 | 3757 | |
3758 | list_delete_node (refresh_list, node); | |
1fe6ed38 | 3759 | ospf_lsa_unlock (&lsa); /* lsa_refresh_queue */ |
718e3744 | 3760 | lsa->refresh_list = -1; |
3761 | listnode_add (lsa_to_refresh, lsa); | |
718e3744 | 3762 | } |
3763 | list_free (refresh_list); | |
3764 | } | |
3765 | } | |
3766 | ||
68980084 | 3767 | ospf->t_lsa_refresher = thread_add_timer (master, ospf_lsa_refresh_walker, |
3768 | ospf, ospf->lsa_refresh_interval); | |
2518efd1 | 3769 | ospf->lsa_refresher_started = quagga_time (NULL); |
718e3744 | 3770 | |
1eb8ef25 | 3771 | for (ALL_LIST_ELEMENTS (lsa_to_refresh, node, nnode, lsa)) |
3772 | ospf_lsa_refresh (ospf, lsa); | |
718e3744 | 3773 | |
3774 | list_delete (lsa_to_refresh); | |
3775 | ||
3776 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3777 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): end"); |
718e3744 | 3778 | |
3779 | return 0; | |
3780 | } | |
3781 |