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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() */ | |
35 | ||
36 | #include "ospfd/ospfd.h" | |
37 | #include "ospfd/ospf_interface.h" | |
38 | #include "ospfd/ospf_ism.h" | |
39 | #include "ospfd/ospf_asbr.h" | |
40 | #include "ospfd/ospf_lsa.h" | |
41 | #include "ospfd/ospf_lsdb.h" | |
42 | #include "ospfd/ospf_neighbor.h" | |
43 | #include "ospfd/ospf_nsm.h" | |
44 | #include "ospfd/ospf_flood.h" | |
45 | #include "ospfd/ospf_packet.h" | |
46 | #include "ospfd/ospf_spf.h" | |
47 | #include "ospfd/ospf_dump.h" | |
48 | #include "ospfd/ospf_route.h" | |
49 | #include "ospfd/ospf_ase.h" | |
50 | #include "ospfd/ospf_zebra.h" | |
51 | ||
52 | \f | |
53 | u_int32_t | |
54 | get_metric (u_char *metric) | |
55 | { | |
56 | u_int32_t m; | |
57 | m = metric[0]; | |
58 | m = (m << 8) + metric[1]; | |
59 | m = (m << 8) + metric[2]; | |
60 | return m; | |
61 | } | |
62 | ||
63 | \f | |
64 | struct timeval | |
65 | tv_adjust (struct timeval a) | |
66 | { | |
67 | while (a.tv_usec >= 1000000) | |
68 | { | |
69 | a.tv_usec -= 1000000; | |
70 | a.tv_sec++; | |
71 | } | |
72 | ||
73 | while (a.tv_usec < 0) | |
74 | { | |
75 | a.tv_usec += 1000000; | |
76 | a.tv_sec--; | |
77 | } | |
78 | ||
79 | return a; | |
80 | } | |
81 | ||
82 | int | |
83 | tv_ceil (struct timeval a) | |
84 | { | |
85 | a = tv_adjust (a); | |
86 | ||
87 | return (a.tv_usec ? a.tv_sec + 1 : a.tv_sec); | |
88 | } | |
89 | ||
90 | int | |
91 | tv_floor (struct timeval a) | |
92 | { | |
93 | a = tv_adjust (a); | |
94 | ||
95 | return a.tv_sec; | |
96 | } | |
97 | ||
98 | struct timeval | |
99 | int2tv (int a) | |
100 | { | |
101 | struct timeval ret; | |
102 | ||
103 | ret.tv_sec = a; | |
104 | ret.tv_usec = 0; | |
105 | ||
106 | return ret; | |
107 | } | |
108 | ||
109 | struct timeval | |
110 | tv_add (struct timeval a, struct timeval b) | |
111 | { | |
112 | struct timeval ret; | |
113 | ||
114 | ret.tv_sec = a.tv_sec + b.tv_sec; | |
115 | ret.tv_usec = a.tv_usec + b.tv_usec; | |
116 | ||
117 | return tv_adjust (ret); | |
118 | } | |
119 | ||
120 | struct timeval | |
121 | tv_sub (struct timeval a, struct timeval b) | |
122 | { | |
123 | struct timeval ret; | |
124 | ||
125 | ret.tv_sec = a.tv_sec - b.tv_sec; | |
126 | ret.tv_usec = a.tv_usec - b.tv_usec; | |
127 | ||
128 | return tv_adjust (ret); | |
129 | } | |
130 | ||
131 | int | |
132 | tv_cmp (struct timeval a, struct timeval b) | |
133 | { | |
134 | return (a.tv_sec == b.tv_sec ? | |
135 | a.tv_usec - b.tv_usec : a.tv_sec - b.tv_sec); | |
136 | } | |
137 | ||
138 | int | |
139 | ospf_lsa_refresh_delay (struct ospf_lsa *lsa) | |
140 | { | |
141 | struct timeval delta, now; | |
142 | int delay = 0; | |
143 | ||
144 | gettimeofday (&now, NULL); | |
145 | delta = tv_sub (now, lsa->tv_orig); | |
146 | ||
147 | if (tv_cmp (delta, int2tv (OSPF_MIN_LS_INTERVAL)) < 0) | |
148 | { | |
149 | delay = tv_ceil (tv_sub (int2tv (OSPF_MIN_LS_INTERVAL), delta)); | |
150 | ||
151 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 152 | zlog_debug ("LSA[Type%d:%s]: Refresh timer delay %d seconds", |
718e3744 | 153 | lsa->data->type, inet_ntoa (lsa->data->id), delay); |
154 | ||
155 | assert (delay > 0); | |
156 | } | |
157 | ||
158 | return delay; | |
159 | } | |
160 | ||
161 | \f | |
162 | int | |
163 | get_age (struct ospf_lsa *lsa) | |
164 | { | |
165 | int age; | |
166 | struct timeval now; | |
167 | ||
168 | gettimeofday (&now, NULL); | |
169 | age = ntohs (lsa->data->ls_age) + tv_floor (tv_sub (now, lsa->tv_recv)); | |
170 | ||
171 | return age; | |
172 | } | |
173 | ||
174 | \f | |
175 | /* Fletcher Checksum -- Refer to RFC1008. */ | |
176 | #define MODX 4102 | |
177 | #define LSA_CHECKSUM_OFFSET 15 | |
178 | ||
179 | u_int16_t | |
180 | ospf_lsa_checksum (struct lsa_header *lsa) | |
181 | { | |
182 | u_char *sp, *ep, *p, *q; | |
183 | int c0 = 0, c1 = 0; | |
184 | int x, y; | |
185 | u_int16_t length; | |
186 | ||
187 | lsa->checksum = 0; | |
188 | length = ntohs (lsa->length) - 2; | |
c9e52be3 | 189 | sp = (u_char *) &lsa->options; |
718e3744 | 190 | |
191 | for (ep = sp + length; sp < ep; sp = q) | |
192 | { | |
193 | q = sp + MODX; | |
194 | if (q > ep) | |
195 | q = ep; | |
196 | for (p = sp; p < q; p++) | |
197 | { | |
198 | c0 += *p; | |
199 | c1 += c0; | |
200 | } | |
201 | c0 %= 255; | |
202 | c1 %= 255; | |
203 | } | |
204 | ||
205 | x = ((length - LSA_CHECKSUM_OFFSET) * c0 - c1) % 255; | |
206 | if (x <= 0) | |
207 | x += 255; | |
208 | y = 510 - c0 - x; | |
209 | if (y > 255) | |
210 | y -= 255; | |
211 | ||
212 | /* take care endian issue. */ | |
213 | lsa->checksum = htons ((x << 8) + y); | |
214 | ||
215 | return (lsa->checksum); | |
216 | } | |
217 | ||
218 | ||
219 | \f | |
220 | /* Create OSPF LSA. */ | |
221 | struct ospf_lsa * | |
222 | ospf_lsa_new () | |
223 | { | |
224 | struct ospf_lsa *new; | |
225 | ||
226 | new = XCALLOC (MTYPE_OSPF_LSA, sizeof (struct ospf_lsa)); | |
227 | memset (new, 0, sizeof (struct ospf_lsa)); | |
228 | ||
229 | new->flags = 0; | |
230 | new->lock = 1; | |
231 | new->retransmit_counter = 0; | |
232 | gettimeofday (&new->tv_recv, NULL); | |
233 | new->tv_orig = new->tv_recv; | |
234 | new->refresh_list = -1; | |
235 | ||
236 | return new; | |
237 | } | |
238 | ||
239 | /* Duplicate OSPF LSA. */ | |
240 | struct ospf_lsa * | |
241 | ospf_lsa_dup (struct ospf_lsa *lsa) | |
242 | { | |
243 | struct ospf_lsa *new; | |
244 | ||
245 | if (lsa == NULL) | |
246 | return NULL; | |
247 | ||
248 | new = XCALLOC (MTYPE_OSPF_LSA, sizeof (struct ospf_lsa)); | |
249 | ||
250 | memcpy (new, lsa, sizeof (struct ospf_lsa)); | |
251 | UNSET_FLAG (new->flags, OSPF_LSA_DISCARD); | |
252 | new->lock = 1; | |
253 | new->retransmit_counter = 0; | |
254 | new->data = ospf_lsa_data_dup (lsa->data); | |
255 | ||
f2c80652 | 256 | /* kevinm: Clear the refresh_list, otherwise there are going |
257 | to be problems when we try to remove the LSA from the | |
258 | queue (which it's not a member of.) | |
259 | XXX: Should we add the LSA to the refresh_list queue? */ | |
260 | new->refresh_list = -1; | |
261 | ||
262 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 263 | zlog_debug ("LSA: duplicated %p (new: %p)", lsa, new); |
f2c80652 | 264 | |
718e3744 | 265 | return new; |
266 | } | |
267 | ||
268 | /* Free OSPF LSA. */ | |
269 | void | |
270 | ospf_lsa_free (struct ospf_lsa *lsa) | |
271 | { | |
272 | assert (lsa->lock == 0); | |
273 | ||
274 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 275 | zlog_debug ("LSA: freed %p", lsa); |
718e3744 | 276 | |
277 | /* Delete LSA data. */ | |
278 | if (lsa->data != NULL) | |
279 | ospf_lsa_data_free (lsa->data); | |
280 | ||
281 | assert (lsa->refresh_list < 0); | |
282 | ||
283 | memset (lsa, 0, sizeof (struct ospf_lsa)); | |
284 | XFREE (MTYPE_OSPF_LSA, lsa); | |
285 | } | |
286 | ||
287 | /* Lock LSA. */ | |
288 | struct ospf_lsa * | |
289 | ospf_lsa_lock (struct ospf_lsa *lsa) | |
290 | { | |
291 | lsa->lock++; | |
292 | return lsa; | |
293 | } | |
294 | ||
295 | /* Unlock LSA. */ | |
296 | void | |
297 | ospf_lsa_unlock (struct ospf_lsa *lsa) | |
298 | { | |
299 | /* This is sanity check. */ | |
300 | if (!lsa) | |
301 | return; | |
302 | ||
303 | lsa->lock--; | |
304 | ||
305 | assert (lsa->lock >= 0); | |
306 | ||
307 | if (lsa->lock == 0) | |
308 | { | |
309 | assert (CHECK_FLAG (lsa->flags, OSPF_LSA_DISCARD)); | |
310 | ospf_lsa_free (lsa); | |
311 | } | |
312 | } | |
313 | ||
314 | /* Check discard flag. */ | |
315 | void | |
316 | ospf_lsa_discard (struct ospf_lsa *lsa) | |
317 | { | |
318 | if (!CHECK_FLAG (lsa->flags, OSPF_LSA_DISCARD)) | |
319 | { | |
320 | SET_FLAG (lsa->flags, OSPF_LSA_DISCARD); | |
321 | ospf_lsa_unlock (lsa); | |
322 | } | |
323 | } | |
324 | ||
325 | /* Create LSA data. */ | |
326 | struct lsa_header * | |
327 | ospf_lsa_data_new (size_t size) | |
328 | { | |
329 | struct lsa_header *new; | |
330 | ||
331 | new = (struct lsa_header *) XMALLOC (MTYPE_OSPF_LSA_DATA, size); | |
332 | memset (new, 0, size); | |
333 | ||
334 | return new; | |
335 | } | |
336 | ||
337 | /* Duplicate LSA data. */ | |
338 | struct lsa_header * | |
339 | ospf_lsa_data_dup (struct lsa_header *lsah) | |
340 | { | |
341 | struct lsa_header *new; | |
342 | ||
343 | new = ospf_lsa_data_new (ntohs (lsah->length)); | |
344 | memcpy (new, lsah, ntohs (lsah->length)); | |
345 | ||
346 | return new; | |
347 | } | |
348 | ||
349 | /* Free LSA data. */ | |
350 | void | |
351 | ospf_lsa_data_free (struct lsa_header *lsah) | |
352 | { | |
353 | if (IS_DEBUG_OSPF (lsa, LSA)) | |
e588f21f | 354 | zlog_debug ("LSA[Type%d:%s]: data freed %p", |
718e3744 | 355 | lsah->type, inet_ntoa (lsah->id), lsah); |
356 | ||
357 | XFREE (MTYPE_OSPF_LSA_DATA, lsah); | |
358 | } | |
359 | ||
360 | \f | |
361 | /* LSA general functions. */ | |
362 | ||
363 | const char * | |
364 | dump_lsa_key (struct ospf_lsa *lsa) | |
365 | { | |
366 | static char buf[] = { | |
52dc7ee6 | 367 | "Type255,id(255.255.255.255),ar(255.255.255.255)" |
718e3744 | 368 | }; |
369 | struct lsa_header *lsah; | |
370 | ||
371 | if (lsa != NULL && (lsah = lsa->data) != NULL) | |
372 | { | |
373 | char id[INET_ADDRSTRLEN], ar[INET_ADDRSTRLEN]; | |
374 | strcpy (id, inet_ntoa (lsah->id)); | |
375 | strcpy (ar, inet_ntoa (lsah->adv_router)); | |
376 | ||
377 | sprintf (buf, "Type%d,id(%s),ar(%s)", lsah->type, id, ar); | |
378 | } | |
379 | else | |
380 | strcpy (buf, "NULL"); | |
381 | ||
382 | return buf; | |
383 | } | |
384 | ||
385 | u_int32_t | |
386 | lsa_seqnum_increment (struct ospf_lsa *lsa) | |
387 | { | |
388 | u_int32_t seqnum; | |
389 | ||
390 | seqnum = ntohl (lsa->data->ls_seqnum) + 1; | |
391 | ||
392 | return htonl (seqnum); | |
393 | } | |
394 | ||
395 | void | |
396 | lsa_header_set (struct stream *s, u_char options, | |
68980084 | 397 | u_char type, struct in_addr id, struct in_addr router_id) |
718e3744 | 398 | { |
399 | struct lsa_header *lsah; | |
400 | ||
401 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
402 | ||
403 | lsah->ls_age = htons (0); | |
404 | lsah->options = options; | |
405 | lsah->type = type; | |
406 | lsah->id = id; | |
68980084 | 407 | lsah->adv_router = router_id; |
718e3744 | 408 | lsah->ls_seqnum = htonl (OSPF_INITIAL_SEQUENCE_NUMBER); |
409 | ||
9985f83c | 410 | stream_forward_endp (s, OSPF_LSA_HEADER_SIZE); |
718e3744 | 411 | } |
412 | \f | |
68980084 | 413 | |
718e3744 | 414 | /* router-LSA related functions. */ |
415 | /* Get router-LSA flags. */ | |
4dadc291 | 416 | static u_char |
718e3744 | 417 | router_lsa_flags (struct ospf_area *area) |
418 | { | |
419 | u_char flags; | |
420 | ||
68980084 | 421 | flags = area->ospf->flags; |
718e3744 | 422 | |
423 | /* Set virtual link flag. */ | |
424 | if (ospf_full_virtual_nbrs (area)) | |
425 | SET_FLAG (flags, ROUTER_LSA_VIRTUAL); | |
426 | else | |
427 | /* Just sanity check */ | |
428 | UNSET_FLAG (flags, ROUTER_LSA_VIRTUAL); | |
429 | ||
430 | /* Set Shortcut ABR behabiour flag. */ | |
431 | UNSET_FLAG (flags, ROUTER_LSA_SHORTCUT); | |
68980084 | 432 | if (area->ospf->abr_type == OSPF_ABR_SHORTCUT) |
718e3744 | 433 | if (!OSPF_IS_AREA_BACKBONE (area)) |
434 | if ((area->shortcut_configured == OSPF_SHORTCUT_DEFAULT && | |
68980084 | 435 | area->ospf->backbone == NULL) || |
718e3744 | 436 | area->shortcut_configured == OSPF_SHORTCUT_ENABLE) |
437 | SET_FLAG (flags, ROUTER_LSA_SHORTCUT); | |
438 | ||
439 | /* ASBR can't exit in stub area. */ | |
440 | if (area->external_routing == OSPF_AREA_STUB) | |
942b6c19 | 441 | UNSET_FLAG (flags, ROUTER_LSA_EXTERNAL); |
442 | /* If ASBR set External flag */ | |
443 | else if (IS_OSPF_ASBR (area->ospf)) | |
444 | SET_FLAG (flags, ROUTER_LSA_EXTERNAL); | |
445 | ||
446 | /* Set ABR dependent flags */ | |
447 | if (IS_OSPF_ABR (area->ospf)) | |
448 | { | |
449 | SET_FLAG (flags, ROUTER_LSA_BORDER); | |
942b6c19 | 450 | /* If Area is NSSA and we are both ABR and unconditional translator, |
d4a53d58 | 451 | * set Nt bit to inform other routers. |
942b6c19 | 452 | */ |
d4a53d58 | 453 | if ( (area->external_routing == OSPF_AREA_NSSA) |
454 | && (area->NSSATranslatorRole == OSPF_NSSA_ROLE_ALWAYS)) | |
455 | SET_FLAG (flags, ROUTER_LSA_NT); | |
942b6c19 | 456 | } |
718e3744 | 457 | return flags; |
458 | } | |
459 | ||
460 | /* Lookup neighbor other than myself. | |
461 | And check neighbor count, | |
462 | Point-to-Point link must have only 1 neighbor. */ | |
463 | struct ospf_neighbor * | |
68980084 | 464 | ospf_nbr_lookup_ptop (struct ospf_interface *oi) |
718e3744 | 465 | { |
718e3744 | 466 | struct ospf_neighbor *nbr = NULL; |
68980084 | 467 | struct route_node *rn; |
718e3744 | 468 | |
469 | /* Search neighbor, there must be one of two nbrs. */ | |
68980084 | 470 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) |
471 | if ((nbr = rn->info)) | |
472 | if (!IPV4_ADDR_SAME (&nbr->router_id, &oi->ospf->router_id)) | |
718e3744 | 473 | if (nbr->state == NSM_Full) |
68980084 | 474 | { |
475 | route_unlock_node (rn); | |
476 | break; | |
477 | } | |
718e3744 | 478 | |
479 | /* PtoP link must have only 1 neighbor. */ | |
68980084 | 480 | if (ospf_nbr_count (oi, 0) > 1) |
718e3744 | 481 | zlog_warn ("Point-to-Point link has more than 1 neighobrs."); |
482 | ||
483 | return nbr; | |
484 | } | |
485 | ||
88d6cf37 | 486 | /* Determine cost of link, taking RFC3137 stub-router support into |
487 | * consideration | |
488 | */ | |
489 | static u_int16_t | |
490 | ospf_link_cost (struct ospf_interface *oi) | |
491 | { | |
492 | /* RFC3137 stub router support */ | |
493 | if (!CHECK_FLAG (oi->area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED)) | |
494 | return oi->output_cost; | |
495 | else | |
496 | return OSPF_OUTPUT_COST_INFINITE; | |
497 | } | |
498 | ||
718e3744 | 499 | /* Set a link information. */ |
779adb01 | 500 | static char |
718e3744 | 501 | link_info_set (struct stream *s, struct in_addr id, |
502 | struct in_addr data, u_char type, u_char tos, u_int16_t cost) | |
503 | { | |
779adb01 | 504 | /* LSA stream is initially allocated to OSPF_MAX_LSA_SIZE, suits |
505 | * vast majority of cases. Some rare routers with lots of links need more. | |
506 | * we try accomodate those here. | |
507 | */ | |
508 | if (STREAM_WRITEABLE(s) < OSPF_ROUTER_LSA_LINK_SIZE) | |
509 | { | |
510 | size_t ret = OSPF_MAX_LSA_SIZE; | |
511 | ||
512 | /* Can we enlarge the stream still? */ | |
513 | if (STREAM_SIZE(s) == OSPF_MAX_LSA_SIZE) | |
514 | { | |
515 | /* we futz the size here for simplicity, really we need to account | |
516 | * for just: | |
517 | * IP Header - (sizeof (struct ip)) | |
518 | * OSPF Header - OSPF_HEADER_SIZE | |
519 | * LSA Header - OSPF_LSA_HEADER_SIZE | |
520 | * MD5 auth data, if MD5 is configured - OSPF_AUTH_MD5_SIZE. | |
521 | * | |
522 | * Simpler just to subtract OSPF_MAX_LSA_SIZE though. | |
523 | */ | |
524 | ret = stream_resize (s, OSPF_MAX_PACKET_SIZE - OSPF_MAX_LSA_SIZE); | |
525 | } | |
526 | ||
527 | if (ret == OSPF_MAX_LSA_SIZE) | |
528 | { | |
529 | zlog_warn ("%s: Out of space in LSA stream, left %ld, size %ld", | |
530 | __func__, STREAM_REMAIN (s), STREAM_SIZE (s)); | |
531 | return 0; | |
532 | } | |
533 | } | |
534 | ||
718e3744 | 535 | /* TOS based routing is not supported. */ |
536 | stream_put_ipv4 (s, id.s_addr); /* Link ID. */ | |
537 | stream_put_ipv4 (s, data.s_addr); /* Link Data. */ | |
538 | stream_putc (s, type); /* Link Type. */ | |
539 | stream_putc (s, tos); /* TOS = 0. */ | |
540 | stream_putw (s, cost); /* Link Cost. */ | |
779adb01 | 541 | |
542 | return 1; | |
718e3744 | 543 | } |
544 | ||
545 | /* Describe Point-to-Point link. */ | |
4dadc291 | 546 | static int |
718e3744 | 547 | lsa_link_ptop_set (struct stream *s, struct ospf_interface *oi) |
548 | { | |
549 | int links = 0; | |
550 | struct ospf_neighbor *nbr; | |
551 | struct in_addr id, mask; | |
88d6cf37 | 552 | u_int16_t cost = ospf_link_cost (oi); |
718e3744 | 553 | |
554 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 555 | zlog_debug ("LSA[Type1]: Set link Point-to-Point"); |
718e3744 | 556 | |
68980084 | 557 | if ((nbr = ospf_nbr_lookup_ptop (oi))) |
718e3744 | 558 | if (nbr->state == NSM_Full) |
559 | { | |
560 | /* For unnumbered point-to-point networks, the Link Data field | |
561 | should specify the interface's MIB-II ifIndex value. */ | |
779adb01 | 562 | links += link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
563 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
718e3744 | 564 | } |
565 | ||
3fb9cd6e | 566 | if (CONNECTED_DEST_HOST(oi->connected)) |
718e3744 | 567 | { |
568 | /* Option 1: | |
569 | link_type = LSA_LINK_TYPE_STUB; | |
570 | link_id = nbr->address.u.prefix4; | |
571 | link_data.s_addr = 0xffffffff; | |
572 | link_cost = o->output_cost; */ | |
573 | ||
574 | id.s_addr = oi->connected->destination->u.prefix4.s_addr; | |
575 | mask.s_addr = 0xffffffff; | |
779adb01 | 576 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
577 | oi->output_cost); | |
718e3744 | 578 | } |
579 | else | |
580 | { | |
581 | /* Option 2: We need to include link to a stub | |
582 | network regardless of the state of the neighbor */ | |
583 | masklen2ip (oi->address->prefixlen, &mask); | |
584 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 585 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
586 | oi->output_cost); | |
718e3744 | 587 | } |
718e3744 | 588 | return links; |
589 | } | |
590 | ||
591 | /* Describe Broadcast Link. */ | |
4dadc291 | 592 | static int |
718e3744 | 593 | lsa_link_broadcast_set (struct stream *s, struct ospf_interface *oi) |
594 | { | |
595 | struct ospf_neighbor *dr; | |
596 | struct in_addr id, mask; | |
88d6cf37 | 597 | u_int16_t cost = ospf_link_cost (oi); |
598 | ||
718e3744 | 599 | /* Describe Type 3 Link. */ |
600 | if (oi->state == ISM_Waiting) | |
601 | { | |
602 | masklen2ip (oi->address->prefixlen, &mask); | |
603 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 604 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
605 | oi->output_cost); | |
718e3744 | 606 | } |
607 | ||
608 | dr = ospf_nbr_lookup_by_addr (oi->nbrs, &DR (oi)); | |
609 | /* Describe Type 2 link. */ | |
610 | if (dr && (dr->state == NSM_Full || | |
611 | IPV4_ADDR_SAME (&oi->address->u.prefix4, &DR (oi))) && | |
68980084 | 612 | ospf_nbr_count (oi, NSM_Full) > 0) |
718e3744 | 613 | { |
779adb01 | 614 | return link_info_set (s, DR (oi), oi->address->u.prefix4, |
615 | LSA_LINK_TYPE_TRANSIT, 0, cost); | |
718e3744 | 616 | } |
617 | /* Describe type 3 link. */ | |
618 | else | |
619 | { | |
620 | masklen2ip (oi->address->prefixlen, &mask); | |
621 | id.s_addr = oi->address->u.prefix4.s_addr & mask.s_addr; | |
779adb01 | 622 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, |
623 | oi->output_cost); | |
718e3744 | 624 | } |
718e3744 | 625 | } |
626 | ||
4dadc291 | 627 | static int |
718e3744 | 628 | lsa_link_loopback_set (struct stream *s, struct ospf_interface *oi) |
629 | { | |
630 | struct in_addr id, mask; | |
88d6cf37 | 631 | |
718e3744 | 632 | /* Describe Type 3 Link. */ |
633 | if (oi->state != ISM_Loopback) | |
634 | return 0; | |
635 | ||
636 | mask.s_addr = 0xffffffff; | |
637 | id.s_addr = oi->address->u.prefix4.s_addr; | |
779adb01 | 638 | return link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, oi->output_cost); |
718e3744 | 639 | } |
640 | ||
641 | /* Describe Virtual Link. */ | |
4dadc291 | 642 | static int |
718e3744 | 643 | lsa_link_virtuallink_set (struct stream *s, struct ospf_interface *oi) |
644 | { | |
645 | struct ospf_neighbor *nbr; | |
88d6cf37 | 646 | u_int16_t cost = ospf_link_cost (oi); |
718e3744 | 647 | |
718e3744 | 648 | if (oi->state == ISM_PointToPoint) |
68980084 | 649 | if ((nbr = ospf_nbr_lookup_ptop (oi))) |
718e3744 | 650 | if (nbr->state == NSM_Full) |
651 | { | |
779adb01 | 652 | return link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
653 | LSA_LINK_TYPE_VIRTUALLINK, 0, cost); | |
718e3744 | 654 | } |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
659 | #define lsa_link_nbma_set(S,O) lsa_link_broadcast_set (S, O) | |
660 | ||
7afa08da | 661 | /* this function add for support point-to-multipoint ,see rfc2328 |
662 | 12.4.1.4.*/ | |
663 | /* from "edward rrr" <edward_rrr@hotmail.com> | |
664 | http://marc.theaimsgroup.com/?l=zebra&m=100739222210507&w=2 */ | |
4dadc291 | 665 | static int |
68980084 | 666 | lsa_link_ptomp_set (struct stream *s, struct ospf_interface *oi) |
7afa08da | 667 | { |
668 | int links = 0; | |
669 | struct route_node *rn; | |
670 | struct ospf_neighbor *nbr = NULL; | |
671 | struct in_addr id, mask; | |
88d6cf37 | 672 | u_int16_t cost = ospf_link_cost (oi); |
7afa08da | 673 | |
674 | mask.s_addr = 0xffffffff; | |
675 | id.s_addr = oi->address->u.prefix4.s_addr; | |
779adb01 | 676 | links += link_info_set (s, id, mask, LSA_LINK_TYPE_STUB, 0, 0); |
7afa08da | 677 | |
1cc8f762 | 678 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 679 | zlog_debug ("PointToMultipoint: running ptomultip_set"); |
7afa08da | 680 | |
681 | /* Search neighbor, */ | |
682 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
683 | if ((nbr = rn->info) != NULL) | |
684 | /* Ignore myself. */ | |
68980084 | 685 | if (!IPV4_ADDR_SAME (&nbr->router_id, &oi->ospf->router_id)) |
7afa08da | 686 | if (nbr->state == NSM_Full) |
687 | ||
688 | { | |
779adb01 | 689 | links += link_info_set (s, nbr->router_id, oi->address->u.prefix4, |
690 | LSA_LINK_TYPE_POINTOPOINT, 0, cost); | |
1cc8f762 | 691 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 692 | zlog_debug ("PointToMultipoint: set link to %s", |
1cc8f762 | 693 | inet_ntoa(oi->address->u.prefix4)); |
7afa08da | 694 | } |
695 | ||
696 | return links; | |
7afa08da | 697 | } |
698 | ||
718e3744 | 699 | /* Set router-LSA link information. */ |
4dadc291 | 700 | static int |
718e3744 | 701 | router_lsa_link_set (struct stream *s, struct ospf_area *area) |
702 | { | |
52dc7ee6 | 703 | struct listnode *node; |
1eb8ef25 | 704 | struct ospf_interface *oi; |
718e3744 | 705 | int links = 0; |
706 | ||
1eb8ef25 | 707 | for (ALL_LIST_ELEMENTS_RO (area->oiflist, node, oi)) |
718e3744 | 708 | { |
718e3744 | 709 | struct interface *ifp = oi->ifp; |
710 | ||
711 | /* Check interface is up, OSPF is enable. */ | |
2e3b2e47 | 712 | if (if_is_operative (ifp)) |
718e3744 | 713 | { |
714 | if (oi->state != ISM_Down) | |
715 | { | |
716 | /* Describe each link. */ | |
717 | switch (oi->type) | |
718 | { | |
719 | case OSPF_IFTYPE_POINTOPOINT: | |
720 | links += lsa_link_ptop_set (s, oi); | |
721 | break; | |
722 | case OSPF_IFTYPE_BROADCAST: | |
723 | links += lsa_link_broadcast_set (s, oi); | |
724 | break; | |
725 | case OSPF_IFTYPE_NBMA: | |
726 | links += lsa_link_nbma_set (s, oi); | |
727 | break; | |
728 | case OSPF_IFTYPE_POINTOMULTIPOINT: | |
68980084 | 729 | links += lsa_link_ptomp_set (s, oi); |
718e3744 | 730 | break; |
731 | case OSPF_IFTYPE_VIRTUALLINK: | |
732 | links += lsa_link_virtuallink_set (s, oi); | |
733 | break; | |
734 | case OSPF_IFTYPE_LOOPBACK: | |
735 | links += lsa_link_loopback_set (s, oi); | |
736 | } | |
737 | } | |
738 | } | |
739 | } | |
740 | ||
741 | return links; | |
742 | } | |
743 | ||
744 | /* Set router-LSA body. */ | |
4dadc291 | 745 | static void |
718e3744 | 746 | ospf_router_lsa_body_set (struct stream *s, struct ospf_area *area) |
747 | { | |
748 | unsigned long putp; | |
749 | u_int16_t cnt; | |
750 | ||
751 | /* Set flags. */ | |
752 | stream_putc (s, router_lsa_flags (area)); | |
753 | ||
754 | /* Set Zero fields. */ | |
755 | stream_putc (s, 0); | |
756 | ||
757 | /* Keep pointer to # links. */ | |
9985f83c | 758 | putp = stream_get_endp(s); |
718e3744 | 759 | |
760 | /* Forward word */ | |
761 | stream_putw(s, 0); | |
762 | ||
763 | /* Set all link information. */ | |
764 | cnt = router_lsa_link_set (s, area); | |
765 | ||
766 | /* Set # of links here. */ | |
767 | stream_putw_at (s, putp, cnt); | |
768 | } | |
88d6cf37 | 769 | \f |
770 | static int | |
771 | ospf_stub_router_timer (struct thread *t) | |
772 | { | |
773 | struct ospf_area *area = THREAD_ARG (t); | |
774 | ||
775 | area->t_stub_router = NULL; | |
776 | ||
777 | SET_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
778 | ||
779 | /* clear stub route state and generate router-lsa refresh, don't | |
780 | * clobber an administratively set stub-router state though. | |
781 | */ | |
782 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
783 | return 0; | |
784 | ||
785 | UNSET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
786 | ||
787 | ospf_router_lsa_timer_add (area); | |
788 | ||
789 | return 0; | |
790 | } | |
718e3744 | 791 | |
88d6cf37 | 792 | inline static void |
793 | ospf_stub_router_check (struct ospf_area *area) | |
794 | { | |
795 | /* area must either be administratively configured to be stub | |
796 | * or startup-time stub-router must be configured and we must in a pre-stub | |
797 | * state. | |
798 | */ | |
799 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_ADMIN_STUB_ROUTED)) | |
800 | { | |
801 | SET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
802 | return; | |
803 | } | |
804 | ||
805 | /* not admin-stubbed, check whether startup stubbing is configured and | |
806 | * whether it's not been done yet | |
807 | */ | |
808 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED)) | |
809 | return; | |
810 | ||
811 | if (area->ospf->stub_router_startup_time == OSPF_STUB_ROUTER_UNCONFIGURED) | |
812 | { | |
813 | /* stub-router is hence done forever for this area, even if someone | |
814 | * tries configure it (take effect next restart). | |
815 | */ | |
816 | SET_FLAG (area->stub_router_state, OSPF_AREA_WAS_START_STUB_ROUTED); | |
817 | return; | |
818 | } | |
819 | ||
820 | /* startup stub-router configured and not yet done */ | |
821 | SET_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED); | |
822 | ||
823 | OSPF_AREA_TIMER_ON (area->t_stub_router, ospf_stub_router_timer, | |
824 | area->ospf->stub_router_startup_time); | |
825 | } | |
826 | \f | |
718e3744 | 827 | /* Create new router-LSA. */ |
4dadc291 | 828 | static struct ospf_lsa * |
718e3744 | 829 | ospf_router_lsa_new (struct ospf_area *area) |
830 | { | |
68980084 | 831 | struct ospf *ospf = area->ospf; |
718e3744 | 832 | struct stream *s; |
833 | struct lsa_header *lsah; | |
834 | struct ospf_lsa *new; | |
835 | int length; | |
836 | ||
837 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 838 | zlog_debug ("LSA[Type1]: Create router-LSA instance"); |
718e3744 | 839 | |
88d6cf37 | 840 | /* check whether stub-router is desired, and if this is the first |
841 | * router LSA. | |
842 | */ | |
843 | ospf_stub_router_check (area); | |
844 | ||
718e3744 | 845 | /* Create a stream for LSA. */ |
846 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
718e3744 | 847 | /* Set LSA common header fields. */ |
d4a53d58 | 848 | lsa_header_set (s, LSA_OPTIONS_GET (area) | LSA_OPTIONS_NSSA_GET (area), |
d4a53d58 | 849 | OSPF_ROUTER_LSA, ospf->router_id, ospf->router_id); |
718e3744 | 850 | |
851 | /* Set router-LSA body fields. */ | |
852 | ospf_router_lsa_body_set (s, area); | |
853 | ||
854 | /* Set length. */ | |
855 | length = stream_get_endp (s); | |
779adb01 | 856 | lsah = (struct lsa_header *) STREAM_DATA (s); |
718e3744 | 857 | lsah->length = htons (length); |
858 | ||
859 | /* Now, create OSPF LSA instance. */ | |
c24d602e | 860 | if ( (new = ospf_lsa_new ()) == NULL) |
861 | { | |
862 | zlog_err ("%s: Unable to create new lsa", __func__); | |
863 | return NULL; | |
864 | } | |
865 | ||
718e3744 | 866 | new->area = area; |
867 | SET_FLAG (new->flags, OSPF_LSA_SELF); | |
868 | ||
869 | /* Copy LSA data to store, discard stream. */ | |
870 | new->data = ospf_lsa_data_new (length); | |
871 | memcpy (new->data, lsah, length); | |
872 | stream_free (s); | |
873 | ||
874 | return new; | |
875 | } | |
876 | ||
877 | /* Originate Router-LSA. */ | |
88d6cf37 | 878 | static struct ospf_lsa * |
718e3744 | 879 | ospf_router_lsa_originate (struct ospf_area *area) |
880 | { | |
881 | struct ospf_lsa *new; | |
88d6cf37 | 882 | |
718e3744 | 883 | /* Create new router-LSA instance. */ |
c24d602e | 884 | if ( (new = ospf_router_lsa_new (area)) == NULL) |
885 | { | |
886 | zlog_err ("%s: ospf_router_lsa_new returned NULL", __func__); | |
887 | return NULL; | |
888 | } | |
718e3744 | 889 | |
890 | /* Sanity check. */ | |
891 | if (new->data->adv_router.s_addr == 0) | |
892 | { | |
893 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 894 | zlog_debug ("LSA[Type1]: AdvRouter is 0, discard"); |
718e3744 | 895 | ospf_lsa_discard (new); |
896 | return NULL; | |
897 | } | |
898 | ||
899 | /* Install LSA to LSDB. */ | |
68980084 | 900 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 901 | |
902 | /* Update LSA origination count. */ | |
68980084 | 903 | area->ospf->lsa_originate_count++; |
718e3744 | 904 | |
905 | /* Flooding new LSA through area. */ | |
906 | ospf_flood_through_area (area, NULL, new); | |
907 | ||
908 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
909 | { | |
e588f21f | 910 | zlog_debug ("LSA[Type%d:%s]: Originate router-LSA %p", |
718e3744 | 911 | new->data->type, inet_ntoa (new->data->id), new); |
912 | ospf_lsa_header_dump (new->data); | |
913 | } | |
914 | ||
915 | return new; | |
916 | } | |
917 | ||
918 | /* Refresh router-LSA. */ | |
4dadc291 | 919 | static struct ospf_lsa * |
718e3744 | 920 | ospf_router_lsa_refresh (struct ospf_lsa *lsa) |
921 | { | |
922 | struct ospf_area *area = lsa->area; | |
923 | struct ospf_lsa *new; | |
924 | ||
925 | /* Sanity check. */ | |
926 | assert (lsa->data); | |
927 | ||
928 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 929 | ospf_ls_retransmit_delete_nbr_area (area, lsa); |
718e3744 | 930 | |
931 | /* Create new router-LSA instance. */ | |
c24d602e | 932 | if ( (new = ospf_router_lsa_new (area)) == NULL) |
933 | { | |
934 | zlog_err ("%s: ospf_router_lsa_new returned NULL", __func__); | |
935 | return NULL; | |
936 | } | |
937 | ||
718e3744 | 938 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); |
939 | ||
68980084 | 940 | ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 941 | |
942 | /* Flood LSA through area. */ | |
943 | ospf_flood_through_area (area, NULL, new); | |
944 | ||
945 | /* Debug logging. */ | |
946 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
947 | { | |
e588f21f | 948 | zlog_debug ("LSA[Type%d:%s]: router-LSA refresh", |
718e3744 | 949 | new->data->type, inet_ntoa (new->data->id)); |
950 | ospf_lsa_header_dump (new->data); | |
951 | } | |
952 | ||
953 | return NULL; | |
954 | } | |
955 | ||
4dadc291 | 956 | static int |
718e3744 | 957 | ospf_router_lsa_timer (struct thread *t) |
958 | { | |
959 | struct ospf_area *area; | |
960 | ||
961 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 962 | zlog_debug ("Timer[router-LSA]: (router-LSA Refresh expire)"); |
718e3744 | 963 | |
964 | area = THREAD_ARG (t); | |
965 | area->t_router_lsa_self = NULL; | |
966 | ||
967 | /* Now refresh router-LSA. */ | |
968 | if (area->router_lsa_self) | |
969 | ospf_router_lsa_refresh (area->router_lsa_self); | |
970 | /* Newly originate router-LSA. */ | |
971 | else | |
972 | ospf_router_lsa_originate (area); | |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
977 | void | |
978 | ospf_router_lsa_timer_add (struct ospf_area *area) | |
979 | { | |
980 | /* Keep area's self-originated router-LSA. */ | |
981 | struct ospf_lsa *lsa = area->router_lsa_self; | |
982 | ||
983 | /* Cancel previously scheduled router-LSA timer. */ | |
984 | if (area->t_router_lsa_self) | |
985 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 986 | zlog_debug ("LSA[Type1]: Cancel previous router-LSA timer"); |
718e3744 | 987 | |
988 | OSPF_TIMER_OFF (area->t_router_lsa_self); | |
989 | ||
990 | /* If router-LSA is originated previously, check the interval time. */ | |
991 | if (lsa) | |
992 | { | |
993 | int delay; | |
994 | if ((delay = ospf_lsa_refresh_delay (lsa)) > 0) | |
995 | { | |
996 | OSPF_AREA_TIMER_ON (area->t_router_lsa_self, | |
997 | ospf_router_lsa_timer, delay); | |
998 | return; | |
999 | } | |
1000 | } | |
1001 | ||
1002 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1003 | zlog_debug ("LSA[Type1]: Scheduling router-LSA origination right away"); |
718e3744 | 1004 | |
1005 | /* Immediately refresh router-LSA. */ | |
1006 | OSPF_AREA_TIMER_ON (area->t_router_lsa_self, ospf_router_lsa_timer, 0); | |
1007 | } | |
1008 | ||
1009 | int | |
68980084 | 1010 | ospf_router_lsa_update_timer (struct thread *thread) |
718e3744 | 1011 | { |
68980084 | 1012 | struct ospf *ospf = THREAD_ARG (thread); |
1eb8ef25 | 1013 | struct listnode *node, *nnode; |
1014 | struct ospf_area *area; | |
718e3744 | 1015 | |
1016 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1017 | zlog_debug ("Timer[router-LSA Update]: (timer expire)"); |
718e3744 | 1018 | |
68980084 | 1019 | ospf->t_router_lsa_update = NULL; |
718e3744 | 1020 | |
1eb8ef25 | 1021 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 1022 | { |
718e3744 | 1023 | struct ospf_lsa *lsa = area->router_lsa_self; |
1024 | struct router_lsa *rl; | |
eb1ce605 | 1025 | const char *area_str; |
718e3744 | 1026 | |
1027 | /* Keep Area ID string. */ | |
1028 | area_str = AREA_NAME (area); | |
1029 | ||
1030 | /* If LSA not exist in this Area, originate new. */ | |
1031 | if (lsa == NULL) | |
1032 | { | |
1033 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1034 | zlog_debug("LSA[Type1]: Create router-LSA for Area %s", area_str); |
718e3744 | 1035 | |
1036 | ospf_router_lsa_originate (area); | |
1037 | } | |
1038 | /* If router-ID is changed, Link ID must change. | |
1039 | First flush old LSA, then originate new. */ | |
68980084 | 1040 | else if (!IPV4_ADDR_SAME (&lsa->data->id, &ospf->router_id)) |
718e3744 | 1041 | { |
1042 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1043 | zlog_debug("LSA[Type%d:%s]: Refresh router-LSA for Area %s", |
718e3744 | 1044 | lsa->data->type, inet_ntoa (lsa->data->id), area_str); |
1045 | ospf_lsa_flush_area (lsa, area); | |
1046 | ospf_lsa_unlock (area->router_lsa_self); | |
1047 | area->router_lsa_self = NULL; | |
1048 | ||
1049 | /* Refresh router-LSA, (not install) and flood through area. */ | |
1050 | ospf_router_lsa_timer_add (area); | |
1051 | } | |
1052 | else | |
1053 | { | |
1054 | rl = (struct router_lsa *) lsa->data; | |
1055 | /* Refresh router-LSA, (not install) and flood through area. */ | |
68980084 | 1056 | if (rl->flags != ospf->flags) |
718e3744 | 1057 | ospf_router_lsa_timer_add (area); |
1058 | } | |
1059 | } | |
1060 | ||
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | \f | |
1065 | /* network-LSA related functions. */ | |
1066 | /* Originate Network-LSA. */ | |
4dadc291 | 1067 | static void |
718e3744 | 1068 | ospf_network_lsa_body_set (struct stream *s, struct ospf_interface *oi) |
1069 | { | |
1070 | struct in_addr mask; | |
1071 | struct route_node *rn; | |
1072 | struct ospf_neighbor *nbr; | |
1073 | ||
1074 | masklen2ip (oi->address->prefixlen, &mask); | |
1075 | stream_put_ipv4 (s, mask.s_addr); | |
1076 | ||
1077 | /* The network-LSA lists those routers that are fully adjacent to | |
1078 | the Designated Router; each fully adjacent router is identified by | |
1079 | its OSPF Router ID. The Designated Router includes itself in this | |
1080 | list. RFC2328, Section 12.4.2 */ | |
1081 | ||
1082 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
1083 | if ((nbr = rn->info) != NULL) | |
1084 | if (nbr->state == NSM_Full || nbr == oi->nbr_self) | |
1085 | stream_put_ipv4 (s, nbr->router_id.s_addr); | |
1086 | } | |
1087 | ||
4dadc291 | 1088 | static struct ospf_lsa * |
718e3744 | 1089 | ospf_network_lsa_new (struct ospf_interface *oi) |
1090 | { | |
1091 | struct stream *s; | |
1092 | struct ospf_lsa *new; | |
1093 | struct lsa_header *lsah; | |
1094 | int length; | |
1095 | ||
1096 | /* If there are no neighbours on this network (the net is stub), | |
1097 | the router does not originate network-LSA (see RFC 12.4.2) */ | |
1098 | if (oi->full_nbrs == 0) | |
1099 | return NULL; | |
1100 | ||
1101 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1102 | zlog_debug ("LSA[Type2]: Create network-LSA instance"); |
718e3744 | 1103 | |
1104 | /* Create new stream for LSA. */ | |
1105 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1106 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1107 | ||
1108 | lsa_header_set (s, (OPTIONS (oi) | LSA_OPTIONS_GET (oi->area)), | |
68980084 | 1109 | OSPF_NETWORK_LSA, DR (oi), oi->ospf->router_id); |
718e3744 | 1110 | |
1111 | /* Set network-LSA body fields. */ | |
1112 | ospf_network_lsa_body_set (s, oi); | |
1113 | ||
1114 | /* Set length. */ | |
1115 | length = stream_get_endp (s); | |
1116 | lsah->length = htons (length); | |
1117 | ||
1118 | /* Create OSPF LSA instance. */ | |
c24d602e | 1119 | if ( (new = ospf_lsa_new ()) == NULL) |
1120 | { | |
1121 | zlog_err ("%s: ospf_lsa_new returned NULL", __func__); | |
1122 | return NULL; | |
1123 | } | |
1124 | ||
718e3744 | 1125 | new->area = oi->area; |
1126 | SET_FLAG (new->flags, OSPF_LSA_SELF); | |
1127 | ||
1128 | /* Copy LSA to store. */ | |
1129 | new->data = ospf_lsa_data_new (length); | |
1130 | memcpy (new->data, lsah, length); | |
1131 | stream_free (s); | |
1132 | ||
1133 | return new; | |
1134 | } | |
1135 | ||
1136 | /* Originate network-LSA. */ | |
4dadc291 | 1137 | static struct ospf_lsa * |
718e3744 | 1138 | ospf_network_lsa_originate (struct ospf_interface *oi) |
1139 | { | |
1140 | struct ospf_lsa *new; | |
1141 | ||
1142 | /* Create new network-LSA instance. */ | |
1143 | new = ospf_network_lsa_new (oi); | |
1144 | if (new == NULL) | |
1145 | return NULL; | |
1146 | ||
1147 | /* Install LSA to LSDB. */ | |
68980084 | 1148 | new = ospf_lsa_install (oi->ospf, oi, new); |
718e3744 | 1149 | |
1150 | /* Update LSA origination count. */ | |
68980084 | 1151 | oi->ospf->lsa_originate_count++; |
718e3744 | 1152 | |
1153 | /* Flooding new LSA through area. */ | |
1154 | ospf_flood_through_area (oi->area, NULL, new); | |
1155 | ||
1156 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1157 | { | |
e588f21f | 1158 | zlog_debug ("LSA[Type%d:%s]: Originate network-LSA %p", |
718e3744 | 1159 | new->data->type, inet_ntoa (new->data->id), new); |
1160 | ospf_lsa_header_dump (new->data); | |
1161 | } | |
1162 | ||
1163 | return new; | |
1164 | } | |
1165 | ||
1166 | int | |
1167 | ospf_network_lsa_refresh (struct ospf_lsa *lsa, struct ospf_interface *oi) | |
1168 | { | |
1169 | struct ospf_area *area = lsa->area; | |
1170 | struct ospf_lsa *new; | |
1171 | ||
1172 | assert (lsa->data); | |
1173 | ||
1174 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 1175 | ospf_ls_retransmit_delete_nbr_area (area, lsa); |
718e3744 | 1176 | |
1177 | /* Create new network-LSA instance. */ | |
1178 | new = ospf_network_lsa_new (oi); | |
1179 | if (new == NULL) | |
1180 | return -1; | |
1181 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
1182 | ||
68980084 | 1183 | ospf_lsa_install (area->ospf, oi, new); |
718e3744 | 1184 | |
1185 | /* Flood LSA through aera. */ | |
1186 | ospf_flood_through_area (area, NULL, new); | |
1187 | ||
1188 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1189 | { | |
e588f21f | 1190 | zlog_debug ("LSA[Type%d:%s]: network-LSA refresh", |
718e3744 | 1191 | new->data->type, inet_ntoa (new->data->id)); |
1192 | ospf_lsa_header_dump (new->data); | |
1193 | } | |
1194 | ||
1195 | return 0; | |
1196 | } | |
1197 | ||
4dadc291 | 1198 | static int |
718e3744 | 1199 | ospf_network_lsa_refresh_timer (struct thread *t) |
1200 | { | |
1201 | struct ospf_interface *oi; | |
1202 | ||
1203 | oi = THREAD_ARG (t); | |
1204 | oi->t_network_lsa_self = NULL; | |
1205 | ||
1206 | if (oi->network_lsa_self) | |
1207 | /* Now refresh network-LSA. */ | |
1208 | ospf_network_lsa_refresh (oi->network_lsa_self, oi); | |
1209 | else | |
1210 | /* Newly create network-LSA. */ | |
1211 | ospf_network_lsa_originate (oi); | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | void | |
1217 | ospf_network_lsa_timer_add (struct ospf_interface *oi) | |
1218 | { | |
1219 | /* Keep interface's self-originated network-LSA. */ | |
1220 | struct ospf_lsa *lsa = oi->network_lsa_self; | |
1221 | ||
1222 | /* Cancel previously schedules network-LSA timer. */ | |
1223 | if (oi->t_network_lsa_self) | |
1224 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1225 | zlog_debug ("LSA[Type2]: Cancel previous network-LSA timer"); |
718e3744 | 1226 | OSPF_TIMER_OFF (oi->t_network_lsa_self); |
1227 | ||
1228 | /* If network-LSA is originated previously, check the interval time. */ | |
1229 | if (lsa) | |
1230 | { | |
1231 | int delay; | |
1232 | if ((delay = ospf_lsa_refresh_delay (lsa)) > 0) | |
1233 | { | |
1234 | oi->t_network_lsa_self = | |
1235 | thread_add_timer (master, ospf_network_lsa_refresh_timer, | |
1236 | oi, delay); | |
1237 | return; | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1242 | zlog_debug ("Scheduling network-LSA origination right away"); |
718e3744 | 1243 | |
1244 | /* Immediately refresh network-LSA. */ | |
1245 | oi->t_network_lsa_self = | |
1246 | thread_add_event (master, ospf_network_lsa_refresh_timer, oi, 0); | |
1247 | } | |
1248 | ||
1249 | \f | |
4dadc291 | 1250 | static void |
718e3744 | 1251 | stream_put_ospf_metric (struct stream *s, u_int32_t metric_value) |
1252 | { | |
1253 | u_int32_t metric; | |
1254 | char *mp; | |
1255 | ||
1256 | /* Put 0 metric. TOS metric is not supported. */ | |
1257 | metric = htonl (metric_value); | |
1258 | mp = (char *) &metric; | |
1259 | mp++; | |
1260 | stream_put (s, mp, 3); | |
1261 | } | |
1262 | ||
1263 | /* summary-LSA related functions. */ | |
4dadc291 | 1264 | static void |
718e3744 | 1265 | ospf_summary_lsa_body_set (struct stream *s, struct prefix *p, |
1266 | u_int32_t metric) | |
1267 | { | |
1268 | struct in_addr mask; | |
1269 | ||
1270 | masklen2ip (p->prefixlen, &mask); | |
1271 | ||
1272 | /* Put Network Mask. */ | |
1273 | stream_put_ipv4 (s, mask.s_addr); | |
1274 | ||
1275 | /* Set # TOS. */ | |
1276 | stream_putc (s, (u_char) 0); | |
1277 | ||
1278 | /* Set metric. */ | |
1279 | stream_put_ospf_metric (s, metric); | |
1280 | } | |
1281 | ||
4dadc291 | 1282 | static struct ospf_lsa * |
718e3744 | 1283 | ospf_summary_lsa_new (struct ospf_area *area, struct prefix *p, |
1284 | u_int32_t metric, struct in_addr id) | |
1285 | { | |
1286 | struct stream *s; | |
1287 | struct ospf_lsa *new; | |
1288 | struct lsa_header *lsah; | |
1289 | int length; | |
1290 | ||
c24d602e | 1291 | if (id.s_addr == 0xffffffff) |
1292 | { | |
1293 | /* Maybe Link State ID not available. */ | |
1294 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1295 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1296 | OSPF_SUMMARY_LSA); | |
1297 | return NULL; | |
1298 | } | |
1299 | ||
718e3744 | 1300 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 1301 | zlog_debug ("LSA[Type3]: Create summary-LSA instance"); |
718e3744 | 1302 | |
1303 | /* Create new stream for LSA. */ | |
1304 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1305 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1306 | ||
68980084 | 1307 | lsa_header_set (s, LSA_OPTIONS_GET (area), OSPF_SUMMARY_LSA, |
1308 | id, area->ospf->router_id); | |
718e3744 | 1309 | |
1310 | /* Set summary-LSA body fields. */ | |
1311 | ospf_summary_lsa_body_set (s, p, metric); | |
1312 | ||
1313 | /* Set length. */ | |
1314 | length = stream_get_endp (s); | |
1315 | lsah->length = htons (length); | |
1316 | ||
1317 | /* Create OSPF LSA instance. */ | |
1318 | new = ospf_lsa_new (); | |
1319 | new->area = area; | |
1320 | SET_FLAG (new->flags, OSPF_LSA_SELF); | |
1321 | ||
1322 | /* Copy LSA to store. */ | |
1323 | new->data = ospf_lsa_data_new (length); | |
1324 | memcpy (new->data, lsah, length); | |
1325 | stream_free (s); | |
1326 | ||
1327 | return new; | |
1328 | } | |
1329 | ||
1330 | /* Originate Summary-LSA. */ | |
1331 | struct ospf_lsa * | |
1332 | ospf_summary_lsa_originate (struct prefix_ipv4 *p, u_int32_t metric, | |
1333 | struct ospf_area *area) | |
1334 | { | |
1335 | struct ospf_lsa *new; | |
1336 | struct in_addr id; | |
1337 | ||
68980084 | 1338 | id = ospf_lsa_unique_id (area->ospf, area->lsdb, OSPF_SUMMARY_LSA, p); |
718e3744 | 1339 | |
c24d602e | 1340 | if (id.s_addr == 0xffffffff) |
1341 | { | |
1342 | /* Maybe Link State ID not available. */ | |
1343 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1344 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1345 | OSPF_SUMMARY_LSA); | |
1346 | return NULL; | |
1347 | } | |
1348 | ||
718e3744 | 1349 | /* Create new summary-LSA instance. */ |
c24d602e | 1350 | if ( !(new = ospf_summary_lsa_new (area, (struct prefix *) p, metric, id))) |
1351 | return NULL; | |
718e3744 | 1352 | |
1353 | /* Instlal LSA to LSDB. */ | |
68980084 | 1354 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 1355 | |
1356 | /* Update LSA origination count. */ | |
68980084 | 1357 | area->ospf->lsa_originate_count++; |
718e3744 | 1358 | |
1359 | /* Flooding new LSA through area. */ | |
1360 | ospf_flood_through_area (area, NULL, new); | |
1361 | ||
1362 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1363 | { | |
e588f21f | 1364 | zlog_debug ("LSA[Type%d:%s]: Originate summary-LSA %p", |
718e3744 | 1365 | new->data->type, inet_ntoa (new->data->id), new); |
1366 | ospf_lsa_header_dump (new->data); | |
1367 | } | |
1368 | ||
1369 | return new; | |
1370 | } | |
1371 | ||
1372 | struct ospf_lsa* | |
68980084 | 1373 | ospf_summary_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1374 | { |
1375 | struct ospf_lsa *new; | |
1376 | struct summary_lsa *sl; | |
1377 | struct prefix p; | |
1378 | ||
1379 | /* Sanity check. */ | |
1380 | assert (lsa->data); | |
1381 | ||
1382 | sl = (struct summary_lsa *)lsa->data; | |
1383 | p.prefixlen = ip_masklen (sl->mask); | |
1384 | new = ospf_summary_lsa_new (lsa->area, &p, GET_METRIC (sl->metric), | |
1385 | sl->header.id); | |
c24d602e | 1386 | |
1387 | if (!new) | |
1388 | return NULL; | |
1389 | ||
718e3744 | 1390 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); |
1391 | ||
1392 | /* Re-calculate checksum. */ | |
1393 | ospf_lsa_checksum (new->data); | |
1394 | ||
68980084 | 1395 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 1396 | |
1397 | /* Flood LSA through AS. */ | |
1398 | ospf_flood_through_area (new->area, NULL, new); | |
1399 | ||
1400 | /* Debug logging. */ | |
1401 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1402 | { | |
e588f21f | 1403 | zlog_debug ("LSA[Type%d:%s]: summary-LSA refresh", |
718e3744 | 1404 | new->data->type, inet_ntoa (new->data->id)); |
1405 | ospf_lsa_header_dump (new->data); | |
1406 | } | |
1407 | ||
1408 | return new; | |
1409 | } | |
1410 | ||
1411 | \f | |
1412 | /* summary-ASBR-LSA related functions. */ | |
4dadc291 | 1413 | static void |
718e3744 | 1414 | ospf_summary_asbr_lsa_body_set (struct stream *s, struct prefix *p, |
1415 | u_int32_t metric) | |
1416 | { | |
1417 | struct in_addr mask; | |
1418 | ||
1419 | masklen2ip (p->prefixlen, &mask); | |
1420 | ||
1421 | /* Put Network Mask. */ | |
1422 | stream_put_ipv4 (s, mask.s_addr); | |
1423 | ||
1424 | /* Set # TOS. */ | |
1425 | stream_putc (s, (u_char) 0); | |
1426 | ||
1427 | /* Set metric. */ | |
1428 | stream_put_ospf_metric (s, metric); | |
1429 | } | |
1430 | ||
4dadc291 | 1431 | static struct ospf_lsa * |
718e3744 | 1432 | ospf_summary_asbr_lsa_new (struct ospf_area *area, struct prefix *p, |
1433 | u_int32_t metric, struct in_addr id) | |
1434 | { | |
1435 | struct stream *s; | |
1436 | struct ospf_lsa *new; | |
1437 | struct lsa_header *lsah; | |
1438 | int length; | |
1439 | ||
c24d602e | 1440 | if (id.s_addr == 0xffffffff) |
1441 | { | |
1442 | /* Maybe Link State ID not available. */ | |
1443 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1444 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1445 | OSPF_ASBR_SUMMARY_LSA); | |
1446 | return NULL; | |
1447 | } | |
1448 | ||
718e3744 | 1449 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 1450 | zlog_debug ("LSA[Type3]: Create summary-LSA instance"); |
718e3744 | 1451 | |
1452 | /* Create new stream for LSA. */ | |
1453 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1454 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1455 | ||
68980084 | 1456 | lsa_header_set (s, LSA_OPTIONS_GET (area), OSPF_ASBR_SUMMARY_LSA, |
1457 | id, area->ospf->router_id); | |
718e3744 | 1458 | |
1459 | /* Set summary-LSA body fields. */ | |
1460 | ospf_summary_asbr_lsa_body_set (s, p, metric); | |
1461 | ||
1462 | /* Set length. */ | |
1463 | length = stream_get_endp (s); | |
1464 | lsah->length = htons (length); | |
1465 | ||
1466 | /* Create OSPF LSA instance. */ | |
1467 | new = ospf_lsa_new (); | |
1468 | new->area = area; | |
1469 | SET_FLAG (new->flags, OSPF_LSA_SELF); | |
1470 | ||
1471 | /* Copy LSA to store. */ | |
1472 | new->data = ospf_lsa_data_new (length); | |
1473 | memcpy (new->data, lsah, length); | |
1474 | stream_free (s); | |
1475 | ||
1476 | return new; | |
1477 | } | |
1478 | ||
1479 | /* Originate summary-ASBR-LSA. */ | |
1480 | struct ospf_lsa * | |
1481 | ospf_summary_asbr_lsa_originate (struct prefix_ipv4 *p, u_int32_t metric, | |
1482 | struct ospf_area *area) | |
1483 | { | |
1484 | struct ospf_lsa *new; | |
1485 | struct in_addr id; | |
1486 | ||
68980084 | 1487 | id = ospf_lsa_unique_id (area->ospf, area->lsdb, OSPF_ASBR_SUMMARY_LSA, p); |
718e3744 | 1488 | |
c24d602e | 1489 | if (id.s_addr == 0xffffffff) |
1490 | { | |
1491 | /* Maybe Link State ID not available. */ | |
1492 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1493 | zlog_debug ("LSA[Type%d]: Link ID not available, can't originate", | |
1494 | OSPF_ASBR_SUMMARY_LSA); | |
1495 | return NULL; | |
1496 | } | |
1497 | ||
718e3744 | 1498 | /* Create new summary-LSA instance. */ |
1499 | new = ospf_summary_asbr_lsa_new (area, (struct prefix *) p, metric, id); | |
c24d602e | 1500 | if (!new) |
1501 | return NULL; | |
718e3744 | 1502 | |
1503 | /* Install LSA to LSDB. */ | |
68980084 | 1504 | new = ospf_lsa_install (area->ospf, NULL, new); |
718e3744 | 1505 | |
1506 | /* Update LSA origination count. */ | |
68980084 | 1507 | area->ospf->lsa_originate_count++; |
718e3744 | 1508 | |
1509 | /* Flooding new LSA through area. */ | |
1510 | ospf_flood_through_area (area, NULL, new); | |
1511 | ||
1512 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1513 | { | |
e588f21f | 1514 | zlog_debug ("LSA[Type%d:%s]: Originate summary-ASBR-LSA %p", |
718e3744 | 1515 | new->data->type, inet_ntoa (new->data->id), new); |
1516 | ospf_lsa_header_dump (new->data); | |
1517 | } | |
1518 | ||
1519 | return new; | |
1520 | } | |
1521 | ||
1522 | struct ospf_lsa* | |
68980084 | 1523 | ospf_summary_asbr_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1524 | { |
1525 | struct ospf_lsa *new; | |
1526 | struct summary_lsa *sl; | |
1527 | struct prefix p; | |
1528 | ||
1529 | /* Sanity check. */ | |
1530 | assert (lsa->data); | |
1531 | ||
1532 | sl = (struct summary_lsa *)lsa->data; | |
1533 | p.prefixlen = ip_masklen (sl->mask); | |
1534 | new = ospf_summary_asbr_lsa_new (lsa->area, &p, GET_METRIC (sl->metric), | |
1535 | sl->header.id); | |
c24d602e | 1536 | if (!new) |
1537 | return NULL; | |
718e3744 | 1538 | |
1539 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
1540 | ||
1541 | /* Re-calculate checksum. */ | |
1542 | ospf_lsa_checksum (new->data); | |
1543 | ||
68980084 | 1544 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 1545 | |
1546 | /* Flood LSA through area. */ | |
1547 | ospf_flood_through_area (new->area, NULL, new); | |
1548 | ||
1549 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
1550 | { | |
e588f21f | 1551 | zlog_debug ("LSA[Type%d:%s]: summary-ASBR-LSA refresh", |
718e3744 | 1552 | new->data->type, inet_ntoa (new->data->id)); |
1553 | ospf_lsa_header_dump (new->data); | |
1554 | } | |
1555 | ||
1556 | return new; | |
1557 | } | |
1558 | ||
1559 | /* AS-external-LSA related functions. */ | |
1560 | ||
1561 | /* Get nexthop for AS-external-LSAs. Return nexthop if its interface | |
1562 | is connected, else 0*/ | |
4dadc291 | 1563 | static struct in_addr |
68980084 | 1564 | ospf_external_lsa_nexthop_get (struct ospf *ospf, struct in_addr nexthop) |
718e3744 | 1565 | { |
1566 | struct in_addr fwd; | |
1567 | struct prefix nh; | |
1eb8ef25 | 1568 | struct listnode *node; |
1569 | struct ospf_interface *oi; | |
718e3744 | 1570 | |
1571 | fwd.s_addr = 0; | |
1572 | ||
1573 | if (!nexthop.s_addr) | |
1574 | return fwd; | |
1575 | ||
1576 | /* Check whether nexthop is covered by OSPF network. */ | |
1577 | nh.family = AF_INET; | |
1578 | nh.u.prefix4 = nexthop; | |
1579 | nh.prefixlen = IPV4_MAX_BITLEN; | |
1580 | ||
1eb8ef25 | 1581 | for (ALL_LIST_ELEMENTS_RO (ospf->oiflist, node, oi)) |
1582 | if (if_is_operative (oi->ifp)) | |
1583 | if (oi->address->family == AF_INET) | |
1584 | if (prefix_match (oi->address, &nh)) | |
1585 | return nexthop; | |
718e3744 | 1586 | |
1587 | return fwd; | |
1588 | } | |
1589 | ||
718e3744 | 1590 | /* NSSA-external-LSA related functions. */ |
1591 | ||
1592 | /* Get 1st IP connection for Forward Addr */ | |
4dadc291 | 1593 | |
718e3744 | 1594 | struct in_addr |
1595 | ospf_get_ip_from_ifp (struct ospf_interface *oi) | |
1596 | { | |
1597 | struct in_addr fwd; | |
1598 | ||
1599 | fwd.s_addr = 0; | |
1600 | ||
2e3b2e47 | 1601 | if (if_is_operative (oi->ifp)) |
718e3744 | 1602 | return oi->address->u.prefix4; |
1603 | ||
1604 | return fwd; | |
1605 | } | |
1606 | ||
1607 | /* Get 1st IP connection for Forward Addr */ | |
1608 | struct in_addr | |
f2c80652 | 1609 | ospf_get_nssa_ip (struct ospf_area *area) |
718e3744 | 1610 | { |
1611 | struct in_addr fwd; | |
f2c80652 | 1612 | struct in_addr best_default; |
1eb8ef25 | 1613 | struct listnode *node; |
1614 | struct ospf_interface *oi; | |
718e3744 | 1615 | |
1616 | fwd.s_addr = 0; | |
f2c80652 | 1617 | best_default.s_addr = 0; |
718e3744 | 1618 | |
1eb8ef25 | 1619 | for (ALL_LIST_ELEMENTS_RO (area->ospf->oiflist, node, oi)) |
718e3744 | 1620 | { |
2e3b2e47 | 1621 | if (if_is_operative (oi->ifp)) |
718e3744 | 1622 | if (oi->area->external_routing == OSPF_AREA_NSSA) |
68980084 | 1623 | if (oi->address && oi->address->family == AF_INET) |
1624 | { | |
1625 | if (best_default.s_addr == 0) | |
1626 | best_default = oi->address->u.prefix4; | |
1627 | if (oi->area == area) | |
1628 | return oi->address->u.prefix4; | |
f2c80652 | 1629 | } |
718e3744 | 1630 | } |
f2c80652 | 1631 | if (best_default.s_addr != 0) |
1632 | return best_default; | |
718e3744 | 1633 | |
68980084 | 1634 | if (best_default.s_addr != 0) |
1635 | return best_default; | |
1636 | ||
718e3744 | 1637 | return fwd; |
1638 | } | |
beebba75 | 1639 | |
718e3744 | 1640 | #define DEFAULT_DEFAULT_METRIC 20 |
1641 | #define DEFAULT_DEFAULT_ORIGINATE_METRIC 10 | |
1642 | #define DEFAULT_DEFAULT_ALWAYS_METRIC 1 | |
1643 | ||
1644 | #define DEFAULT_METRIC_TYPE EXTERNAL_METRIC_TYPE_2 | |
1645 | ||
1646 | int | |
68980084 | 1647 | metric_type (struct ospf *ospf, u_char src) |
718e3744 | 1648 | { |
68980084 | 1649 | return (ospf->dmetric[src].type < 0 ? |
1650 | DEFAULT_METRIC_TYPE : ospf->dmetric[src].type); | |
718e3744 | 1651 | } |
1652 | ||
1653 | int | |
68980084 | 1654 | metric_value (struct ospf *ospf, u_char src) |
718e3744 | 1655 | { |
68980084 | 1656 | if (ospf->dmetric[src].value < 0) |
718e3744 | 1657 | { |
1658 | if (src == DEFAULT_ROUTE) | |
1659 | { | |
68980084 | 1660 | if (ospf->default_originate == DEFAULT_ORIGINATE_ZEBRA) |
718e3744 | 1661 | return DEFAULT_DEFAULT_ORIGINATE_METRIC; |
1662 | else | |
1663 | return DEFAULT_DEFAULT_ALWAYS_METRIC; | |
1664 | } | |
68980084 | 1665 | else if (ospf->default_metric < 0) |
718e3744 | 1666 | return DEFAULT_DEFAULT_METRIC; |
1667 | else | |
68980084 | 1668 | return ospf->default_metric; |
718e3744 | 1669 | } |
1670 | ||
68980084 | 1671 | return ospf->dmetric[src].value; |
718e3744 | 1672 | } |
1673 | ||
1674 | /* Set AS-external-LSA body. */ | |
4dadc291 | 1675 | static void |
68980084 | 1676 | ospf_external_lsa_body_set (struct stream *s, struct external_info *ei, |
1677 | struct ospf *ospf) | |
718e3744 | 1678 | { |
1679 | struct prefix_ipv4 *p = &ei->p; | |
1680 | struct in_addr mask, fwd_addr; | |
1681 | u_int32_t mvalue; | |
1682 | int mtype; | |
1683 | int type; | |
1684 | ||
1685 | /* Put Network Mask. */ | |
1686 | masklen2ip (p->prefixlen, &mask); | |
1687 | stream_put_ipv4 (s, mask.s_addr); | |
1688 | ||
1689 | /* If prefix is default, specify DEFAULT_ROUTE. */ | |
1690 | type = is_prefix_default (&ei->p) ? DEFAULT_ROUTE : ei->type; | |
1691 | ||
1692 | mtype = (ROUTEMAP_METRIC_TYPE (ei) != -1) ? | |
68980084 | 1693 | ROUTEMAP_METRIC_TYPE (ei) : metric_type (ospf, type); |
718e3744 | 1694 | |
1695 | mvalue = (ROUTEMAP_METRIC (ei) != -1) ? | |
68980084 | 1696 | ROUTEMAP_METRIC (ei) : metric_value (ospf, type); |
718e3744 | 1697 | |
1698 | /* Put type of external metric. */ | |
1699 | stream_putc (s, (mtype == EXTERNAL_METRIC_TYPE_2 ? 0x80 : 0)); | |
1700 | ||
1701 | /* Put 0 metric. TOS metric is not supported. */ | |
1702 | stream_put_ospf_metric (s, mvalue); | |
1703 | ||
1704 | /* Get forwarding address to nexthop if on the Connection List, else 0. */ | |
68980084 | 1705 | fwd_addr = ospf_external_lsa_nexthop_get (ospf, ei->nexthop); |
718e3744 | 1706 | |
1707 | /* Put forwarding address. */ | |
1708 | stream_put_ipv4 (s, fwd_addr.s_addr); | |
1709 | ||
1710 | /* Put route tag -- This value should be introduced from configuration. */ | |
1711 | stream_putl (s, 0); | |
1712 | } | |
1713 | ||
1714 | /* Create new external-LSA. */ | |
4dadc291 | 1715 | static struct ospf_lsa * |
68980084 | 1716 | ospf_external_lsa_new (struct ospf *ospf, |
1717 | struct external_info *ei, struct in_addr *old_id) | |
718e3744 | 1718 | { |
1719 | struct stream *s; | |
1720 | struct lsa_header *lsah; | |
1721 | struct ospf_lsa *new; | |
1722 | struct in_addr id; | |
1723 | int length; | |
1724 | ||
1725 | if (ei == NULL) | |
1726 | { | |
1727 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1728 | zlog_debug ("LSA[Type5]: External info is NULL, could not originated"); |
718e3744 | 1729 | return NULL; |
1730 | } | |
1731 | ||
1732 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1733 | zlog_debug ("LSA[Type5]: Originate AS-external-LSA instance"); |
718e3744 | 1734 | |
1735 | /* If old Link State ID is specified, refresh LSA with same ID. */ | |
1736 | if (old_id) | |
1737 | id = *old_id; | |
1738 | /* Get Link State with unique ID. */ | |
1739 | else | |
1740 | { | |
68980084 | 1741 | id = ospf_lsa_unique_id (ospf, ospf->lsdb, OSPF_AS_EXTERNAL_LSA, &ei->p); |
718e3744 | 1742 | if (id.s_addr == 0xffffffff) |
1743 | { | |
1744 | /* Maybe Link State ID not available. */ | |
1745 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 1746 | zlog_debug ("LSA[Type5]: Link ID not available, can't originate"); |
718e3744 | 1747 | return NULL; |
1748 | } | |
1749 | } | |
1750 | ||
1751 | /* Create new stream for LSA. */ | |
1752 | s = stream_new (OSPF_MAX_LSA_SIZE); | |
1753 | lsah = (struct lsa_header *) STREAM_DATA (s); | |
1754 | ||
1755 | /* Set LSA common header fields. */ | |
68980084 | 1756 | lsa_header_set (s, OSPF_OPTION_E, OSPF_AS_EXTERNAL_LSA, |
1757 | id, ospf->router_id); | |
718e3744 | 1758 | |
1759 | /* Set AS-external-LSA body fields. */ | |
68980084 | 1760 | ospf_external_lsa_body_set (s, ei, ospf); |
718e3744 | 1761 | |
1762 | /* Set length. */ | |
1763 | length = stream_get_endp (s); | |
1764 | lsah->length = htons (length); | |
1765 | ||
1766 | /* Now, create OSPF LSA instance. */ | |
1767 | new = ospf_lsa_new (); | |
1768 | new->area = NULL; | |
1769 | SET_FLAG (new->flags, OSPF_LSA_SELF|OSPF_LSA_APPROVED); | |
1770 | ||
1771 | /* Copy LSA data to store, discard stream. */ | |
1772 | new->data = ospf_lsa_data_new (length); | |
1773 | memcpy (new->data, lsah, length); | |
1774 | stream_free (s); | |
1775 | ||
1776 | return new; | |
1777 | } | |
1778 | ||
718e3744 | 1779 | /* As Type-7 */ |
4dadc291 | 1780 | static void |
68980084 | 1781 | ospf_install_flood_nssa (struct ospf *ospf, |
1782 | struct ospf_lsa *lsa, struct external_info *ei) | |
718e3744 | 1783 | { |
d4a53d58 | 1784 | struct ospf_lsa *new; |
68980084 | 1785 | struct as_external_lsa *extlsa; |
1eb8ef25 | 1786 | struct ospf_area *area; |
1787 | struct listnode *node, *nnode; | |
718e3744 | 1788 | |
d4a53d58 | 1789 | /* LSA may be a Type-5 originated via translation of a Type-7 LSA |
1790 | * which originated from an NSSA area. In which case it should not be | |
1791 | * flooded back to NSSA areas. | |
1792 | */ | |
1793 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
1794 | return; | |
1795 | ||
718e3744 | 1796 | /* NSSA Originate or Refresh (If anyNSSA) |
1797 | ||
1798 | LSA is self-originated. And just installed as Type-5. | |
1799 | Additionally, install as Type-7 LSDB for every attached NSSA. | |
1800 | ||
1801 | P-Bit controls which ABR performs translation to outside world; If | |
1802 | we are an ABR....do not set the P-bit, because we send the Type-5, | |
1803 | not as the ABR Translator, but as the ASBR owner within the AS! | |
1804 | ||
1805 | If we are NOT ABR, Flood through NSSA as Type-7 w/P-bit set. The | |
1806 | elected ABR Translator will see the P-bit, Translate, and re-flood. | |
1807 | ||
1808 | Later, ABR_TASK and P-bit will scan Type-7 LSDB and translate to | |
1809 | Type-5's to non-NSSA Areas. (it will also attempt a re-install) */ | |
1810 | ||
1eb8ef25 | 1811 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
68980084 | 1812 | { |
0c14ad88 | 1813 | /* Don't install Type-7 LSA's into nonNSSA area */ |
1814 | if (area->external_routing != OSPF_AREA_NSSA) | |
1815 | continue; | |
718e3744 | 1816 | |
68980084 | 1817 | /* make lsa duplicate, lock=1 */ |
d4a53d58 | 1818 | new = ospf_lsa_dup (lsa); |
1819 | new->area = area; | |
1820 | new->data->type = OSPF_AS_NSSA_LSA; | |
718e3744 | 1821 | |
68980084 | 1822 | /* set P-bit if not ABR */ |
020709f9 | 1823 | if (! IS_OSPF_ABR (ospf)) |
68980084 | 1824 | { |
d4a53d58 | 1825 | SET_FLAG(new->data->options, OSPF_OPTION_NP); |
68980084 | 1826 | |
1827 | /* set non-zero FWD ADDR | |
1828 | ||
1829 | draft-ietf-ospf-nssa-update-09.txt | |
1830 | ||
1831 | if the network between the NSSA AS boundary router and the | |
1832 | adjacent AS is advertised into OSPF as an internal OSPF route, | |
1833 | the forwarding address should be the next op address as is cu | |
1834 | currently done with type-5 LSAs. If the intervening network is | |
1835 | not adversited into OSPF as an internal OSPF route and the | |
1836 | type-7 LSA's P-bit is set a forwarding address should be | |
1837 | selected from one of the router's active OSPF inteface addresses | |
1838 | which belong to the NSSA. If no such addresses exist, then | |
1839 | no type-7 LSA's with the P-bit set should originate from this | |
1840 | router. */ | |
1841 | ||
d4a53d58 | 1842 | /* kevinm: not updating lsa anymore, just new */ |
1843 | extlsa = (struct as_external_lsa *)(new->data); | |
68980084 | 1844 | |
1845 | if (extlsa->e[0].fwd_addr.s_addr == 0) | |
1846 | extlsa->e[0].fwd_addr = ospf_get_nssa_ip(area); /* this NSSA area in ifp */ | |
718e3744 | 1847 | |
d748032f | 1848 | if (extlsa->e[0].fwd_addr.s_addr == 0) |
1849 | { | |
1850 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1851 | zlog_debug ("LSA[Type-7]: Could not build FWD-ADDR"); |
d4a53d58 | 1852 | ospf_lsa_discard(new); |
d748032f | 1853 | return; |
1854 | } | |
f2c80652 | 1855 | } |
68980084 | 1856 | /* Re-calculate checksum. */ |
d4a53d58 | 1857 | ospf_lsa_checksum (new->data); |
718e3744 | 1858 | |
68980084 | 1859 | /* install also as Type-7 */ |
d4a53d58 | 1860 | ospf_lsa_install (ospf, NULL, new); /* Remove Old, Lock New = 2 */ |
68980084 | 1861 | |
1862 | /* will send each copy, lock=2+n */ | |
d4a53d58 | 1863 | ospf_flood_through_as (ospf, NULL, new); /* all attached NSSA's, no AS/STUBs */ |
1864 | } | |
1865 | } | |
1866 | ||
4dadc291 | 1867 | static struct ospf_lsa * |
d4a53d58 | 1868 | ospf_lsa_translated_nssa_new (struct ospf *ospf, |
1869 | struct ospf_lsa *type7) | |
1870 | { | |
1871 | ||
1872 | struct ospf_lsa *new; | |
1873 | struct as_external_lsa *ext, *extnew; | |
1874 | struct external_info ei; | |
1875 | ||
1876 | ext = (struct as_external_lsa *)(type7->data); | |
1877 | ||
1878 | /* need external_info struct, fill in bare minimum */ | |
1879 | ei.p.family = AF_INET; | |
1880 | ei.p.prefix = type7->data->id; | |
1881 | ei.p.prefixlen = ip_masklen (ext->mask); | |
1882 | ei.type = ZEBRA_ROUTE_OSPF; | |
1883 | ei.nexthop = ext->header.adv_router; | |
1884 | ei.route_map_set.metric = -1; | |
1885 | ei.route_map_set.metric_type = -1; | |
1886 | ei.tag = 0; | |
1887 | ||
1888 | if ( (new = ospf_external_lsa_new (ospf, &ei, &type7->data->id)) == NULL) | |
1889 | { | |
1890 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1891 | zlog_debug ("ospf_nssa_translate_originate(): Could not originate " |
d4a53d58 | 1892 | "Translated Type-5 for %s", |
1893 | inet_ntoa (ei.p.prefix)); | |
1894 | return NULL; | |
1895 | } | |
1896 | ||
1897 | extnew = (struct as_external_lsa *)(new->data); | |
1898 | ||
1899 | /* copy over Type-7 data to new */ | |
1900 | extnew->e[0].tos = ext->e[0].tos; | |
1901 | extnew->e[0].route_tag = ext->e[0].route_tag; | |
1902 | extnew->e[0].fwd_addr.s_addr = ext->e[0].fwd_addr.s_addr; | |
1903 | new->data->ls_seqnum = type7->data->ls_seqnum; | |
1904 | ||
1905 | /* add translated flag, checksum and lock new lsa */ | |
1906 | SET_FLAG (new->flags, OSPF_LSA_LOCAL_XLT); /* Translated from 7 */ | |
1907 | ospf_lsa_checksum (new->data); | |
1908 | new = ospf_lsa_lock (new); | |
1909 | ||
1910 | return new; | |
1911 | } | |
1912 | ||
1913 | /* compare type-5 to type-7 | |
1914 | * -1: err, 0: same, 1: different | |
1915 | */ | |
4dadc291 | 1916 | static int |
d4a53d58 | 1917 | ospf_lsa_translated_nssa_compare (struct ospf_lsa *t7, struct ospf_lsa *t5) |
1918 | { | |
1919 | ||
1920 | struct as_external_lsa *e5 = (struct as_external_lsa *)t5, | |
1921 | *e7 = (struct as_external_lsa *)t7; | |
1922 | ||
1923 | ||
1924 | /* sanity checks */ | |
1925 | if (! ((t5->data->type == OSPF_AS_EXTERNAL_LSA) | |
1926 | && (t7->data->type == OSPF_AS_NSSA_LSA))) | |
1927 | return -1; | |
1928 | ||
1929 | if (t5->data->id.s_addr != t7->data->id.s_addr) | |
1930 | return -1; | |
1931 | ||
1932 | if (t5->data->ls_seqnum != t7->data->ls_seqnum) | |
1933 | return LSA_REFRESH_FORCE; | |
1934 | ||
1935 | if (e5->mask.s_addr != e7->mask.s_addr) | |
1936 | return LSA_REFRESH_FORCE; | |
1937 | ||
1938 | if (e5->e[0].fwd_addr.s_addr != e7->e[0].fwd_addr.s_addr) | |
1939 | return LSA_REFRESH_FORCE; | |
1940 | ||
1941 | if (e5->e[0].route_tag != e7->e[0].route_tag) | |
1942 | return LSA_REFRESH_FORCE; | |
1943 | ||
1944 | if (GET_METRIC (e5->e[0].metric) != GET_METRIC (e7->e[0].metric)) | |
1945 | return LSA_REFRESH_FORCE; | |
1946 | ||
1947 | return LSA_REFRESH_IF_CHANGED; | |
1948 | } | |
1949 | ||
1950 | /* Originate Translated Type-5 for supplied Type-7 NSSA LSA */ | |
1951 | struct ospf_lsa * | |
1952 | ospf_translated_nssa_originate (struct ospf *ospf, struct ospf_lsa *type7) | |
1953 | { | |
1954 | struct ospf_lsa *new; | |
1955 | struct as_external_lsa *extnew; | |
1956 | ||
1957 | /* we cant use ospf_external_lsa_originate() as we need to set | |
1958 | * the OSPF_LSA_LOCAL_XLT flag, must originate by hand | |
1959 | */ | |
1960 | ||
1961 | if ( (new = ospf_lsa_translated_nssa_new (ospf, type7)) == NULL) | |
1962 | { | |
1963 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 1964 | zlog_debug ("ospf_translated_nssa_originate(): Could not translate " |
d4a53d58 | 1965 | "Type-7, Id %s, to Type-5", |
1966 | inet_ntoa (type7->data->id)); | |
1967 | return NULL; | |
1968 | } | |
1969 | ||
1970 | extnew = (struct as_external_lsa *)new; | |
1971 | ||
1972 | if (IS_DEBUG_OSPF_NSSA) | |
1973 | { | |
e588f21f | 1974 | zlog_debug ("ospf_translated_nssa_originate(): " |
d4a53d58 | 1975 | "translated Type 7, installed:"); |
1976 | ospf_lsa_header_dump (new->data); | |
e588f21f | 1977 | zlog_debug (" Network mask: %d",ip_masklen (extnew->mask)); |
1978 | zlog_debug (" Forward addr: %s", inet_ntoa (extnew->e[0].fwd_addr)); | |
d4a53d58 | 1979 | } |
1980 | ||
1981 | if ( (new = ospf_lsa_install (ospf, NULL, new)) == NULL) | |
1982 | { | |
1983 | if (IS_DEBUG_OSPF_NSSA); | |
e588f21f | 1984 | zlog_debug ("ospf_lsa_translated_nssa_originate(): " |
d4a53d58 | 1985 | "Could not install LSA " |
1986 | "id %s", inet_ntoa (type7->data->id)); | |
1987 | return NULL; | |
1988 | } | |
1989 | ||
1990 | ospf->lsa_originate_count++; | |
1991 | ospf_flood_through_as (ospf, NULL, new); | |
1992 | ||
1993 | return new; | |
1994 | } | |
1995 | ||
1996 | /* Refresh Translated from NSSA AS-external-LSA. */ | |
1997 | struct ospf_lsa * | |
1998 | ospf_translated_nssa_refresh (struct ospf *ospf, struct ospf_lsa *type7, | |
1999 | struct ospf_lsa *type5) | |
2000 | { | |
2001 | struct ospf_lsa *new = NULL; | |
2002 | ||
2003 | /* Sanity checks. */ | |
2004 | assert (type7 || type5); | |
2005 | if (type7) | |
2006 | assert (type7->data); | |
2007 | if (type5) | |
2008 | assert (type5->data); | |
2009 | assert (ospf->anyNSSA); | |
2010 | ||
2011 | /* get required data according to what has been given */ | |
2012 | if (type7 && type5 == NULL) | |
2013 | { | |
2014 | /* find the translated Type-5 for this Type-7 */ | |
2015 | struct as_external_lsa *ext = (struct as_external_lsa *)(type7->data); | |
2016 | struct prefix_ipv4 p = | |
2017 | { | |
2018 | .prefix = type7->data->id, | |
2019 | .prefixlen = ip_masklen (ext->mask), | |
2020 | .family = AF_INET, | |
2021 | }; | |
2022 | ||
2023 | type5 = ospf_external_info_find_lsa (ospf, &p); | |
2024 | } | |
2025 | else if (type5 && type7 == NULL) | |
2026 | { | |
2027 | /* find the type-7 from which supplied type-5 was translated, | |
2028 | * ie find first type-7 with same LSA Id. | |
2029 | */ | |
1eb8ef25 | 2030 | struct listnode *ln, *lnn; |
d4a53d58 | 2031 | struct route_node *rn; |
2032 | struct ospf_lsa *lsa; | |
2033 | struct ospf_area *area; | |
2034 | ||
1eb8ef25 | 2035 | for (ALL_LIST_ELEMENTS (ospf->areas, ln, lnn, area)) |
d4a53d58 | 2036 | { |
2037 | if (area->external_routing != OSPF_AREA_NSSA | |
2038 | && !type7) | |
2039 | continue; | |
2040 | ||
2041 | LSDB_LOOP (NSSA_LSDB(area), rn, lsa) | |
2042 | { | |
2043 | if (lsa->data->id.s_addr == type5->data->id.s_addr) | |
2044 | { | |
2045 | type7 = lsa; | |
2046 | break; | |
2047 | } | |
2048 | } | |
2049 | } | |
68980084 | 2050 | } |
d4a53d58 | 2051 | |
2052 | /* do we have type7? */ | |
2053 | if (!type7) | |
2054 | { | |
2055 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 2056 | zlog_debug ("ospf_translated_nssa_refresh(): no Type-7 found for " |
d4a53d58 | 2057 | "Type-5 LSA Id %s", |
2058 | inet_ntoa (type7->data->id)); | |
2059 | return NULL; | |
2060 | } | |
2061 | ||
2062 | /* do we have valid translated type5? */ | |
2063 | if (type5 == NULL || !CHECK_FLAG (type5->flags, OSPF_LSA_LOCAL_XLT) ) | |
2064 | { | |
2065 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 2066 | zlog_debug ("ospf_translated_nssa_refresh(): No translated Type-5 " |
d4a53d58 | 2067 | "found for Type-7 with Id %s", |
2068 | inet_ntoa (type7->data->id)); | |
2069 | return NULL; | |
2070 | } | |
2071 | ||
2072 | /* Delete LSA from neighbor retransmit-list. */ | |
2073 | ospf_ls_retransmit_delete_nbr_as (ospf, type5); | |
2074 | ||
2075 | /* create new translated LSA */ | |
2076 | if ( (new = ospf_lsa_translated_nssa_new (ospf, type7)) == NULL) | |
2077 | { | |
2078 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 2079 | zlog_debug ("ospf_translated_nssa_refresh(): Could not translate " |
d4a53d58 | 2080 | "Type-7 for %s to Type-5", |
2081 | inet_ntoa (type7->data->id)); | |
2082 | return NULL; | |
2083 | } | |
2084 | ||
2085 | if ( !(new = ospf_lsa_install (ospf, NULL, new)) ) | |
2086 | { | |
2087 | if (IS_DEBUG_OSPF_NSSA) | |
e588f21f | 2088 | zlog_debug ("ospf_translated_nssa_refresh(): Could not install " |
d4a53d58 | 2089 | "translated LSA, Id %s", |
2090 | inet_ntoa (new->data->id)); | |
2091 | return NULL; | |
2092 | } | |
2093 | ||
2094 | /* Flood LSA through area. */ | |
2095 | ospf_flood_through_as (ospf, NULL, new); | |
2096 | ||
2097 | return new; | |
718e3744 | 2098 | } |
718e3744 | 2099 | |
2100 | int | |
2101 | is_prefix_default (struct prefix_ipv4 *p) | |
2102 | { | |
2103 | struct prefix_ipv4 q; | |
2104 | ||
2105 | q.family = AF_INET; | |
2106 | q.prefix.s_addr = 0; | |
2107 | q.prefixlen = 0; | |
2108 | ||
2109 | return prefix_same ((struct prefix *) p, (struct prefix *) &q); | |
2110 | } | |
2111 | ||
2112 | /* Originate an AS-external-LSA, install and flood. */ | |
2113 | struct ospf_lsa * | |
68980084 | 2114 | ospf_external_lsa_originate (struct ospf *ospf, struct external_info *ei) |
718e3744 | 2115 | { |
2116 | struct ospf_lsa *new; | |
2117 | ||
2118 | /* Added for NSSA project.... | |
2119 | ||
2120 | External LSAs are originated in ASBRs as usual, but for NSSA systems. | |
2121 | there is the global Type-5 LSDB and a Type-7 LSDB installed for | |
2122 | every area. The Type-7's are flooded to every IR and every ABR; We | |
2123 | install the Type-5 LSDB so that the normal "refresh" code operates | |
2124 | as usual, and flag them as not used during ASE calculations. The | |
2125 | Type-7 LSDB is used for calculations. Each Type-7 has a Forwarding | |
2126 | Address of non-zero. | |
2127 | ||
2128 | If an ABR is the elected NSSA translator, following SPF and during | |
2129 | the ABR task it will translate all the scanned Type-7's, with P-bit | |
2130 | ON and not-self generated, and translate to Type-5's throughout the | |
2131 | non-NSSA/STUB AS. | |
2132 | ||
2133 | A difference in operation depends whether this ASBR is an ABR | |
2134 | or not. If not an ABR, the P-bit is ON, to indicate that any | |
2135 | elected NSSA-ABR can perform its translation. | |
2136 | ||
2137 | If an ABR, the P-bit is OFF; No ABR will perform translation and | |
2138 | this ASBR will flood the Type-5 LSA as usual. | |
2139 | ||
2140 | For the case where this ASBR is not an ABR, the ASE calculations | |
2141 | are based on the Type-5 LSDB; The Type-7 LSDB exists just to | |
2142 | demonstrate to the user that there are LSA's that belong to any | |
2143 | attached NSSA. | |
2144 | ||
2145 | Finally, it just so happens that when the ABR is translating every | |
2146 | Type-7 into Type-5, it installs it into the Type-5 LSDB as an | |
2147 | approved Type-5 (translated from Type-7); at the end of translation | |
2148 | if any Translated Type-5's remain unapproved, then they must be | |
2149 | flushed from the AS. | |
2150 | ||
2151 | */ | |
2152 | ||
2153 | /* Check the AS-external-LSA should be originated. */ | |
68980084 | 2154 | if (!ospf_redistribute_check (ospf, ei, NULL)) |
718e3744 | 2155 | return NULL; |
2156 | ||
2157 | /* Create new AS-external-LSA instance. */ | |
68980084 | 2158 | if ((new = ospf_external_lsa_new (ospf, ei, NULL)) == NULL) |
718e3744 | 2159 | { |
2160 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2161 | zlog_debug ("LSA[Type5:%s]: Could not originate AS-external-LSA", |
718e3744 | 2162 | inet_ntoa (ei->p.prefix)); |
2163 | return NULL; | |
2164 | } | |
2165 | ||
2166 | /* Install newly created LSA into Type-5 LSDB, lock = 1. */ | |
68980084 | 2167 | ospf_lsa_install (ospf, NULL, new); |
718e3744 | 2168 | |
2169 | /* Update LSA origination count. */ | |
68980084 | 2170 | ospf->lsa_originate_count++; |
718e3744 | 2171 | |
2172 | /* Flooding new LSA. only to AS (non-NSSA/STUB) */ | |
68980084 | 2173 | ospf_flood_through_as (ospf, NULL, new); |
718e3744 | 2174 | |
718e3744 | 2175 | /* If there is any attached NSSA, do special handling */ |
d4a53d58 | 2176 | if (ospf->anyNSSA && |
2177 | /* stay away from translated LSAs! */ | |
2178 | !(CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT))) | |
68980084 | 2179 | ospf_install_flood_nssa (ospf, new, ei); /* Install/Flood Type-7 to all NSSAs */ |
718e3744 | 2180 | |
2181 | /* Debug logging. */ | |
2182 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2183 | { | |
e588f21f | 2184 | zlog_debug ("LSA[Type%d:%s]: Originate AS-external-LSA %p", |
718e3744 | 2185 | new->data->type, inet_ntoa (new->data->id), new); |
2186 | ospf_lsa_header_dump (new->data); | |
2187 | } | |
2188 | ||
2189 | return new; | |
2190 | } | |
2191 | ||
2192 | /* Originate AS-external-LSA from external info with initial flag. */ | |
2193 | int | |
68980084 | 2194 | ospf_external_lsa_originate_timer (struct thread *thread) |
718e3744 | 2195 | { |
68980084 | 2196 | struct ospf *ospf = THREAD_ARG (thread); |
718e3744 | 2197 | struct route_node *rn; |
2198 | struct external_info *ei; | |
2199 | struct route_table *rt; | |
68980084 | 2200 | int type = THREAD_VAL (thread); |
718e3744 | 2201 | |
68980084 | 2202 | ospf->t_external_lsa = NULL; |
718e3744 | 2203 | |
2204 | /* Originate As-external-LSA from all type of distribute source. */ | |
2205 | if ((rt = EXTERNAL_INFO (type))) | |
2206 | for (rn = route_top (rt); rn; rn = route_next (rn)) | |
2207 | if ((ei = rn->info) != NULL) | |
2208 | if (!is_prefix_default ((struct prefix_ipv4 *)&ei->p)) | |
68980084 | 2209 | if (!ospf_external_lsa_originate (ospf, ei)) |
718e3744 | 2210 | zlog_warn ("LSA: AS-external-LSA was not originated."); |
2211 | ||
2212 | return 0; | |
2213 | } | |
2214 | ||
4dadc291 | 2215 | static struct external_info * |
020709f9 | 2216 | ospf_default_external_info (struct ospf *ospf) |
718e3744 | 2217 | { |
2218 | int type; | |
2219 | struct route_node *rn; | |
2220 | struct prefix_ipv4 p; | |
2221 | ||
2222 | p.family = AF_INET; | |
2223 | p.prefix.s_addr = 0; | |
2224 | p.prefixlen = 0; | |
2225 | ||
2226 | /* First, lookup redistributed default route. */ | |
2227 | for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) | |
2228 | if (EXTERNAL_INFO (type) && type != ZEBRA_ROUTE_OSPF) | |
2229 | { | |
2230 | rn = route_node_lookup (EXTERNAL_INFO (type), (struct prefix *) &p); | |
2231 | if (rn != NULL) | |
2232 | { | |
2233 | route_unlock_node (rn); | |
2234 | assert (rn->info); | |
68980084 | 2235 | if (ospf_redistribute_check (ospf, rn->info, NULL)) |
718e3744 | 2236 | return rn->info; |
2237 | } | |
2238 | } | |
2239 | ||
2240 | return NULL; | |
2241 | } | |
2242 | ||
2243 | int | |
68980084 | 2244 | ospf_default_originate_timer (struct thread *thread) |
718e3744 | 2245 | { |
2246 | int *origin; | |
2247 | struct prefix_ipv4 p; | |
2248 | struct in_addr nexthop; | |
2249 | struct external_info *ei; | |
020709f9 | 2250 | struct ospf *ospf; |
718e3744 | 2251 | |
020709f9 | 2252 | ospf = ospf_lookup (); |
2253 | ||
718e3744 | 2254 | /* Get originate flags. */ |
68980084 | 2255 | origin = THREAD_ARG (thread); |
718e3744 | 2256 | |
2257 | p.family = AF_INET; | |
2258 | p.prefix.s_addr = 0; | |
2259 | p.prefixlen = 0; | |
2260 | ||
2261 | if (*origin == DEFAULT_ORIGINATE_ALWAYS) | |
2262 | { | |
2263 | /* If there is no default route via redistribute, | |
2264 | then originate AS-external-LSA with nexthop 0 (self). */ | |
2265 | nexthop.s_addr = 0; | |
2266 | ospf_external_info_add (DEFAULT_ROUTE, p, 0, nexthop); | |
2267 | } | |
2268 | ||
020709f9 | 2269 | if ((ei = ospf_default_external_info (ospf))) |
68980084 | 2270 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2271 | |
2272 | return 0; | |
2273 | } | |
2274 | ||
645878f1 | 2275 | /* Flush any NSSA LSAs for given prefix */ |
2276 | void | |
2277 | ospf_nssa_lsa_flush (struct ospf *ospf, struct prefix_ipv4 *p) | |
2278 | { | |
1eb8ef25 | 2279 | struct listnode *node, *nnode; |
645878f1 | 2280 | struct ospf_lsa *lsa; |
2281 | struct ospf_area *area; | |
2282 | ||
1eb8ef25 | 2283 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
645878f1 | 2284 | { |
1eb8ef25 | 2285 | if (area->external_routing == OSPF_AREA_NSSA) |
d748032f | 2286 | { |
2287 | if (!(lsa = ospf_lsa_lookup (area, OSPF_AS_NSSA_LSA, p->prefix, | |
2288 | ospf->router_id))) | |
2289 | { | |
2290 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2291 | zlog_debug ("LSA: There is no such AS-NSSA-LSA %s/%d in LSDB", |
d748032f | 2292 | inet_ntoa (p->prefix), p->prefixlen); |
2293 | continue; | |
2294 | } | |
2295 | ospf_ls_retransmit_delete_nbr_area (area, lsa); | |
2296 | if (!IS_LSA_MAXAGE (lsa)) | |
2297 | { | |
2298 | ospf_refresher_unregister_lsa (ospf, lsa); | |
2299 | ospf_lsa_flush_area (lsa, area); | |
2300 | } | |
2301 | } | |
645878f1 | 2302 | } |
2303 | } | |
645878f1 | 2304 | |
718e3744 | 2305 | /* Flush an AS-external-LSA from LSDB and routing domain. */ |
2306 | void | |
68980084 | 2307 | ospf_external_lsa_flush (struct ospf *ospf, |
2308 | u_char type, struct prefix_ipv4 *p, | |
5339cfdb | 2309 | unsigned int ifindex /*, struct in_addr nexthop */) |
718e3744 | 2310 | { |
2311 | struct ospf_lsa *lsa; | |
2312 | ||
2313 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2314 | zlog_debug ("LSA: Flushing AS-external-LSA %s/%d", |
718e3744 | 2315 | inet_ntoa (p->prefix), p->prefixlen); |
2316 | ||
2317 | /* First lookup LSA from LSDB. */ | |
68980084 | 2318 | if (!(lsa = ospf_external_info_find_lsa (ospf, p))) |
718e3744 | 2319 | { |
2320 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2321 | zlog_debug ("LSA: There is no such AS-external-LSA %s/%d in LSDB", |
718e3744 | 2322 | inet_ntoa (p->prefix), p->prefixlen); |
2323 | return; | |
2324 | } | |
beebba75 | 2325 | |
d4a53d58 | 2326 | /* If LSA is selforiginated, not a translated LSA, and there is |
2327 | * NSSA area, flush Type-7 LSA's at first. | |
2328 | */ | |
2329 | if (IS_LSA_SELF(lsa) && (ospf->anyNSSA) | |
2330 | && !(CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT))) | |
d748032f | 2331 | ospf_nssa_lsa_flush (ospf, p); |
718e3744 | 2332 | |
2333 | /* Sweep LSA from Link State Retransmit List. */ | |
68980084 | 2334 | ospf_ls_retransmit_delete_nbr_as (ospf, lsa); |
718e3744 | 2335 | |
2336 | /* There must be no self-originated LSA in rtrs_external. */ | |
2337 | #if 0 | |
2338 | /* Remove External route from Zebra. */ | |
2339 | ospf_zebra_delete ((struct prefix_ipv4 *) p, &nexthop); | |
2340 | #endif | |
2341 | ||
2342 | if (!IS_LSA_MAXAGE (lsa)) | |
2343 | { | |
2344 | /* Unregister LSA from Refresh queue. */ | |
68980084 | 2345 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 2346 | |
2347 | /* Flush AS-external-LSA through AS. */ | |
68980084 | 2348 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 2349 | } |
2350 | ||
2351 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2352 | zlog_debug ("ospf_external_lsa_flush(): stop"); |
718e3744 | 2353 | } |
2354 | ||
2355 | void | |
68980084 | 2356 | ospf_external_lsa_refresh_default (struct ospf *ospf) |
718e3744 | 2357 | { |
2358 | struct prefix_ipv4 p; | |
2359 | struct external_info *ei; | |
2360 | struct ospf_lsa *lsa; | |
2361 | ||
2362 | p.family = AF_INET; | |
2363 | p.prefixlen = 0; | |
2364 | p.prefix.s_addr = 0; | |
2365 | ||
020709f9 | 2366 | ei = ospf_default_external_info (ospf); |
68980084 | 2367 | lsa = ospf_external_info_find_lsa (ospf, &p); |
718e3744 | 2368 | |
2369 | if (ei) | |
2370 | { | |
2371 | if (lsa) | |
2372 | { | |
2373 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2374 | zlog_debug ("LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p", lsa); |
68980084 | 2375 | ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_FORCE); |
718e3744 | 2376 | } |
2377 | else | |
2378 | { | |
2379 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2380 | zlog_debug ("LSA[Type5:0.0.0.0]: Originate AS-external-LSA"); |
68980084 | 2381 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2382 | } |
2383 | } | |
2384 | else | |
2385 | { | |
2386 | if (lsa) | |
2387 | { | |
2388 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 2389 | zlog_debug ("LSA[Type5:0.0.0.0]: Flush AS-external-LSA"); |
68980084 | 2390 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 2391 | } |
2392 | } | |
2393 | } | |
2394 | ||
2395 | void | |
68980084 | 2396 | ospf_external_lsa_refresh_type (struct ospf *ospf, u_char type, int force) |
718e3744 | 2397 | { |
2398 | struct route_node *rn; | |
2399 | struct external_info *ei; | |
2400 | ||
2401 | if (type != DEFAULT_ROUTE) | |
2402 | if (EXTERNAL_INFO(type)) | |
2403 | /* Refresh each redistributed AS-external-LSAs. */ | |
2404 | for (rn = route_top (EXTERNAL_INFO (type)); rn; rn = route_next (rn)) | |
2405 | if ((ei = rn->info)) | |
2406 | if (!is_prefix_default (&ei->p)) | |
2407 | { | |
2408 | struct ospf_lsa *lsa; | |
2409 | ||
68980084 | 2410 | if ((lsa = ospf_external_info_find_lsa (ospf, &ei->p))) |
2411 | ospf_external_lsa_refresh (ospf, lsa, ei, force); | |
718e3744 | 2412 | else |
68980084 | 2413 | ospf_external_lsa_originate (ospf, ei); |
718e3744 | 2414 | } |
2415 | } | |
2416 | ||
2417 | /* Refresh AS-external-LSA. */ | |
2418 | void | |
68980084 | 2419 | ospf_external_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa, |
718e3744 | 2420 | struct external_info *ei, int force) |
2421 | { | |
2422 | struct ospf_lsa *new; | |
2423 | int changed; | |
2424 | ||
2425 | /* Check the AS-external-LSA should be originated. */ | |
68980084 | 2426 | if (!ospf_redistribute_check (ospf, ei, &changed)) |
718e3744 | 2427 | { |
d4a53d58 | 2428 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) |
e588f21f | 2429 | zlog_debug ("LSA[Type%d:%s]: Could not be refreshed, " |
d4a53d58 | 2430 | "redist check fail", |
2431 | lsa->data->type, inet_ntoa (lsa->data->id)); | |
68980084 | 2432 | ospf_external_lsa_flush (ospf, ei->type, &ei->p, |
5339cfdb | 2433 | ei->ifindex /*, ei->nexthop */); |
718e3744 | 2434 | return; |
2435 | } | |
2436 | ||
2437 | if (!changed && !force) | |
d4a53d58 | 2438 | { |
2439 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 2440 | zlog_debug ("LSA[Type%d:%s]: Not refreshed, not changed/forced", |
d4a53d58 | 2441 | lsa->data->type, inet_ntoa (lsa->data->id)); |
2442 | return; | |
2443 | } | |
718e3744 | 2444 | |
2445 | /* Delete LSA from neighbor retransmit-list. */ | |
68980084 | 2446 | ospf_ls_retransmit_delete_nbr_as (ospf, lsa); |
718e3744 | 2447 | |
2448 | /* Unregister AS-external-LSA from refresh-list. */ | |
68980084 | 2449 | ospf_refresher_unregister_lsa (ospf, lsa); |
718e3744 | 2450 | |
68980084 | 2451 | new = ospf_external_lsa_new (ospf, ei, &lsa->data->id); |
718e3744 | 2452 | |
2453 | if (new == NULL) | |
2454 | { | |
2455 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 2456 | zlog_debug ("LSA[Type%d:%s]: Could not be refreshed", lsa->data->type, |
718e3744 | 2457 | inet_ntoa (lsa->data->id)); |
2458 | return; | |
2459 | } | |
2460 | ||
2461 | new->data->ls_seqnum = lsa_seqnum_increment (lsa); | |
2462 | ||
2463 | /* Record timestamp. */ | |
2464 | gettimeofday (&new->tv_orig, NULL); | |
2465 | ||
2466 | /* Re-calculate checksum. */ | |
2467 | ospf_lsa_checksum (new->data); | |
2468 | ||
68980084 | 2469 | ospf_lsa_install (ospf, NULL, new); /* As type-5. */ |
718e3744 | 2470 | |
2471 | /* Flood LSA through AS. */ | |
68980084 | 2472 | ospf_flood_through_as (ospf, NULL, new); |
718e3744 | 2473 | |
718e3744 | 2474 | /* If any attached NSSA, install as Type-7, flood to all NSSA Areas */ |
d4a53d58 | 2475 | if (ospf->anyNSSA && !(CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT))) |
68980084 | 2476 | ospf_install_flood_nssa (ospf, new, ei); /* Install/Flood per new rules */ |
718e3744 | 2477 | |
d4a53d58 | 2478 | /* Register self-originated LSA to refresh queue. |
2479 | * Translated LSAs should not be registered, but refreshed upon | |
2480 | * refresh of the Type-7 | |
2481 | */ | |
2482 | if ( !CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT) ) | |
2483 | ospf_refresher_register_lsa (ospf, new); | |
718e3744 | 2484 | |
2485 | /* Debug logging. */ | |
2486 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2487 | { | |
e588f21f | 2488 | zlog_debug ("LSA[Type%d:%s]: AS-external-LSA refresh", |
d4a53d58 | 2489 | new->data->type, inet_ntoa (new->data->id)); |
718e3744 | 2490 | ospf_lsa_header_dump (new->data); |
2491 | } | |
2492 | ||
2493 | return; | |
2494 | } | |
2495 | ||
2496 | \f | |
2497 | /* LSA installation functions. */ | |
2498 | ||
2499 | /* Install router-LSA to an area. */ | |
4dadc291 | 2500 | static struct ospf_lsa * |
68980084 | 2501 | ospf_router_lsa_install (struct ospf *ospf, |
2502 | struct ospf_lsa *new, int rt_recalc) | |
718e3744 | 2503 | { |
2504 | struct ospf_area *area = new->area; | |
2505 | ||
2506 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2507 | The entire routing table must be recalculated, starting with | |
2508 | the shortest path calculations for each area (not just the | |
2509 | area whose link-state database has changed). | |
2510 | */ | |
2511 | if (rt_recalc) | |
68980084 | 2512 | ospf_spf_calculate_schedule (ospf); |
718e3744 | 2513 | |
2514 | if (IS_LSA_SELF (new)) | |
2515 | { | |
2516 | /* Set router-LSA refresh timer. */ | |
2517 | OSPF_TIMER_OFF (area->t_router_lsa_self); | |
2518 | OSPF_AREA_TIMER_ON (area->t_router_lsa_self, | |
d4a53d58 | 2519 | ospf_router_lsa_timer, OSPF_LS_REFRESH_TIME); |
718e3744 | 2520 | |
2521 | /* Set self-originated router-LSA. */ | |
2522 | ospf_lsa_unlock (area->router_lsa_self); | |
2523 | area->router_lsa_self = ospf_lsa_lock (new); | |
2524 | ||
2525 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) | |
e588f21f | 2526 | zlog_debug("LSA[Type%d]: ID %s seq 0x%x is self-originated", |
0c2be26c | 2527 | new->data->type, inet_ntoa (new->data->id), |
2528 | ntohl(new->data->ls_seqnum)); | |
718e3744 | 2529 | } |
2530 | ||
2531 | return new; | |
2532 | } | |
2533 | ||
2534 | #define OSPF_INTERFACE_TIMER_ON(T,F,V) \ | |
2535 | if (!(T)) \ | |
2536 | (T) = thread_add_timer (master, (F), oi, (V)) | |
2537 | ||
2538 | /* Install network-LSA to an area. */ | |
4dadc291 | 2539 | static struct ospf_lsa * |
68980084 | 2540 | ospf_network_lsa_install (struct ospf *ospf, |
2541 | struct ospf_interface *oi, | |
718e3744 | 2542 | struct ospf_lsa *new, |
2543 | int rt_recalc) | |
2544 | { | |
2545 | ||
2546 | /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs | |
2547 | The entire routing table must be recalculated, starting with | |
2548 | the shortest path calculations for each area (not just the | |
2549 | area whose link-state database has changed). | |
2550 | */ | |
2551 | if (rt_recalc) | |
68980084 | 2552 | ospf_spf_calculate_schedule (ospf); |
718e3744 | 2553 | |
2554 | /* We supposed that when LSA is originated by us, we pass the int | |
2555 | for which it was originated. If LSA was received by flooding, | |
2556 | the RECEIVED flag is set, so we do not link the LSA to the int. */ | |
2557 | if (IS_LSA_SELF (new) && !CHECK_FLAG (new->flags, OSPF_LSA_RECEIVED)) | |
2558 | { | |
2559 | /* Set LSRefresh timer. */ | |
2560 | OSPF_TIMER_OFF (oi->t_network_lsa_self); | |
2561 | ||
2562 | OSPF_INTERFACE_TIMER_ON (oi->t_network_lsa_self, | |
2563 | ospf_network_lsa_refresh_timer, | |
2564 | OSPF_LS_REFRESH_TIME); | |
2565 | ||
2566 | ospf_lsa_unlock (oi->network_lsa_self); | |
2567 | oi->network_lsa_self = ospf_lsa_lock (new); | |
2568 | } | |
2569 | ||
2570 | return new; | |
2571 | } | |
2572 | ||
2573 | /* Install summary-LSA to an area. */ | |
4dadc291 | 2574 | static struct ospf_lsa * |
68980084 | 2575 | ospf_summary_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2576 | int rt_recalc) | |
718e3744 | 2577 | { |
718e3744 | 2578 | if (rt_recalc && !IS_LSA_SELF (new)) |
2579 | { | |
2580 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2581 | The best route to the destination described by the summary- | |
2582 | LSA must be recalculated (see Section 16.5). If this | |
2583 | destination is an AS boundary router, it may also be | |
2584 | necessary to re-examine all the AS-external-LSAs. | |
2585 | */ | |
2586 | ||
2587 | #if 0 | |
2588 | /* This doesn't exist yet... */ | |
2589 | ospf_summary_incremental_update(new); */ | |
2590 | #else /* #if 0 */ | |
68980084 | 2591 | ospf_spf_calculate_schedule (ospf); |
718e3744 | 2592 | #endif /* #if 0 */ |
2593 | ||
2594 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) | |
e588f21f | 2595 | zlog_debug ("ospf_summary_lsa_install(): SPF scheduled"); |
718e3744 | 2596 | } |
2597 | ||
2598 | if (IS_LSA_SELF (new)) | |
68980084 | 2599 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2600 | |
2601 | return new; | |
2602 | } | |
2603 | ||
2604 | /* Install ASBR-summary-LSA to an area. */ | |
4dadc291 | 2605 | static struct ospf_lsa * |
68980084 | 2606 | ospf_summary_asbr_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2607 | int rt_recalc) | |
718e3744 | 2608 | { |
2609 | if (rt_recalc && !IS_LSA_SELF (new)) | |
2610 | { | |
2611 | /* RFC 2328 Section 13.2 Summary-LSAs | |
2612 | The best route to the destination described by the summary- | |
2613 | LSA must be recalculated (see Section 16.5). If this | |
2614 | destination is an AS boundary router, it may also be | |
2615 | necessary to re-examine all the AS-external-LSAs. | |
2616 | */ | |
2617 | #if 0 | |
2618 | /* These don't exist yet... */ | |
2619 | ospf_summary_incremental_update(new); | |
2620 | /* Isn't this done by the above call? | |
2621 | - RFC 2328 Section 16.5 implies it should be */ | |
2622 | /* ospf_ase_calculate_schedule(); */ | |
2623 | #else /* #if 0 */ | |
68980084 | 2624 | ospf_spf_calculate_schedule (ospf); |
718e3744 | 2625 | #endif /* #if 0 */ |
2626 | } | |
2627 | ||
2628 | /* register LSA to refresh-list. */ | |
2629 | if (IS_LSA_SELF (new)) | |
68980084 | 2630 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2631 | |
2632 | return new; | |
2633 | } | |
2634 | ||
2635 | /* Install AS-external-LSA. */ | |
4dadc291 | 2636 | static struct ospf_lsa * |
68980084 | 2637 | ospf_external_lsa_install (struct ospf *ospf, struct ospf_lsa *new, |
2638 | int rt_recalc) | |
718e3744 | 2639 | { |
68980084 | 2640 | ospf_ase_register_external_lsa (new, ospf); |
718e3744 | 2641 | /* If LSA is not self-originated, calculate an external route. */ |
2642 | if (rt_recalc) | |
2643 | { | |
2644 | /* RFC 2328 Section 13.2 AS-external-LSAs | |
2645 | The best route to the destination described by the AS- | |
2646 | external-LSA must be recalculated (see Section 16.6). | |
2647 | */ | |
2648 | ||
2649 | if (!IS_LSA_SELF (new)) | |
d4a53d58 | 2650 | ospf_ase_incremental_update (ospf, new); |
718e3744 | 2651 | } |
2652 | ||
d4a53d58 | 2653 | if (new->data->type == OSPF_AS_NSSA_LSA) |
2654 | { | |
2655 | /* There is no point to register selforiginate Type-7 LSA for | |
2656 | * refreshing. We rely on refreshing Type-5 LSA's | |
2657 | */ | |
2658 | if (IS_LSA_SELF (new)) | |
2659 | return new; | |
2660 | else | |
2661 | { | |
2662 | /* Try refresh type-5 translated LSA for this LSA, if one exists. | |
2663 | * New translations will be taken care of by the abr_task. | |
2664 | */ | |
2665 | ospf_translated_nssa_refresh (ospf, new, NULL); | |
2666 | } | |
2667 | } | |
d748032f | 2668 | |
d4a53d58 | 2669 | /* Register self-originated LSA to refresh queue. |
8fc0f64b | 2670 | * Leave Translated LSAs alone if NSSA is enabled |
d4a53d58 | 2671 | */ |
beebba75 | 2672 | if (IS_LSA_SELF (new) && !CHECK_FLAG (new->flags, OSPF_LSA_LOCAL_XLT ) ) |
68980084 | 2673 | ospf_refresher_register_lsa (ospf, new); |
718e3744 | 2674 | |
2675 | return new; | |
2676 | } | |
2677 | ||
2678 | void | |
68980084 | 2679 | ospf_discard_from_db (struct ospf *ospf, |
2680 | struct ospf_lsdb *lsdb, struct ospf_lsa *lsa) | |
718e3744 | 2681 | { |
2682 | struct ospf_lsa *old; | |
2683 | ||
2684 | old = ospf_lsdb_lookup (lsdb, lsa); | |
2685 | ||
2686 | if (!old) | |
2687 | return; | |
2688 | ||
2689 | if (old->refresh_list >= 0) | |
68980084 | 2690 | ospf_refresher_unregister_lsa (ospf, old); |
718e3744 | 2691 | |
2692 | switch (old->data->type) | |
2693 | { | |
2694 | case OSPF_AS_EXTERNAL_LSA: | |
69310a67 | 2695 | ospf_ase_unregister_external_lsa (old, ospf); |
2696 | ospf_ls_retransmit_delete_nbr_as (ospf, old); | |
2697 | break; | |
718e3744 | 2698 | #ifdef HAVE_OPAQUE_LSA |
2699 | case OSPF_OPAQUE_AS_LSA: | |
68980084 | 2700 | ospf_ls_retransmit_delete_nbr_as (ospf, old); |
718e3744 | 2701 | break; |
69310a67 | 2702 | #endif /* HAVE_OPAQUE_LSA */ |
d748032f | 2703 | case OSPF_AS_NSSA_LSA: |
2704 | ospf_ls_retransmit_delete_nbr_area (old->area, old); | |
2705 | ospf_ase_unregister_external_lsa (old, ospf); | |
beebba75 | 2706 | break; |
718e3744 | 2707 | default: |
68980084 | 2708 | ospf_ls_retransmit_delete_nbr_area (old->area, old); |
718e3744 | 2709 | break; |
2710 | } | |
2711 | ||
68980084 | 2712 | ospf_lsa_maxage_delete (ospf, old); |
718e3744 | 2713 | ospf_lsa_discard (old); |
2714 | } | |
2715 | ||
718e3744 | 2716 | struct ospf_lsa * |
68980084 | 2717 | ospf_lsa_install (struct ospf *ospf, struct ospf_interface *oi, |
2718 | struct ospf_lsa *lsa) | |
718e3744 | 2719 | { |
2720 | struct ospf_lsa *new = NULL; | |
2721 | struct ospf_lsa *old = NULL; | |
2722 | struct ospf_lsdb *lsdb = NULL; | |
2723 | int rt_recalc; | |
2724 | ||
2725 | /* Set LSDB. */ | |
2726 | switch (lsa->data->type) | |
2727 | { | |
f2c80652 | 2728 | /* kevinm */ |
2729 | case OSPF_AS_NSSA_LSA: | |
2730 | if (lsa->area) | |
2731 | lsdb = lsa->area->lsdb; | |
2732 | else | |
68980084 | 2733 | lsdb = ospf->lsdb; |
f2c80652 | 2734 | break; |
718e3744 | 2735 | case OSPF_AS_EXTERNAL_LSA: |
2736 | #ifdef HAVE_OPAQUE_LSA | |
2737 | case OSPF_OPAQUE_AS_LSA: | |
2738 | #endif /* HAVE_OPAQUE_LSA */ | |
68980084 | 2739 | lsdb = ospf->lsdb; |
718e3744 | 2740 | break; |
2741 | default: | |
2742 | lsdb = lsa->area->lsdb; | |
2743 | break; | |
2744 | } | |
2745 | ||
718e3744 | 2746 | assert (lsdb); |
2747 | ||
2748 | /* RFC 2328 13.2. Installing LSAs in the database | |
2749 | ||
2750 | Installing a new LSA in the database, either as the result of | |
2751 | flooding or a newly self-originated LSA, may cause the OSPF | |
2752 | routing table structure to be recalculated. The contents of the | |
2753 | new LSA should be compared to the old instance, if present. If | |
2754 | there is no difference, there is no need to recalculate the | |
2755 | routing table. When comparing an LSA to its previous instance, | |
2756 | the following are all considered to be differences in contents: | |
2757 | ||
2758 | o The LSA's Options field has changed. | |
2759 | ||
2760 | o One of the LSA instances has LS age set to MaxAge, and | |
2761 | the other does not. | |
2762 | ||
2763 | o The length field in the LSA header has changed. | |
2764 | ||
2765 | o The body of the LSA (i.e., anything outside the 20-byte | |
2766 | LSA header) has changed. Note that this excludes changes | |
2767 | in LS Sequence Number and LS Checksum. | |
2768 | ||
2769 | */ | |
2770 | /* Look up old LSA and determine if any SPF calculation or incremental | |
2771 | update is needed */ | |
2772 | old = ospf_lsdb_lookup (lsdb, lsa); | |
2773 | ||
2774 | /* Do comparision and record if recalc needed. */ | |
2775 | rt_recalc = 0; | |
2776 | if ( old == NULL || ospf_lsa_different(old, lsa)) | |
2777 | rt_recalc = 1; | |
2778 | ||
7ddf1d6e | 2779 | /* |
2780 | Sequence number check (Section 14.1 of rfc 2328) | |
2781 | "Premature aging is used when it is time for a self-originated | |
2782 | LSA's sequence number field to wrap. At this point, the current | |
2783 | LSA instance (having LS sequence number MaxSequenceNumber) must | |
2784 | be prematurely aged and flushed from the routing domain before a | |
2785 | new instance with sequence number equal to InitialSequenceNumber | |
2786 | can be originated. " | |
2787 | */ | |
2788 | ||
c2b478d7 | 2789 | if (ntohl(lsa->data->ls_seqnum) - 1 == OSPF_MAX_SEQUENCE_NUMBER) |
7ddf1d6e | 2790 | { |
2791 | if (ospf_lsa_is_self_originated(ospf, lsa)) | |
2792 | { | |
0c2be26c | 2793 | lsa->data->ls_seqnum = htonl(OSPF_MAX_SEQUENCE_NUMBER); |
2794 | ||
2795 | if (!IS_LSA_MAXAGE(lsa)) | |
7ddf1d6e | 2796 | lsa->flags |= OSPF_LSA_PREMATURE_AGE; |
2797 | lsa->data->ls_age = htons (OSPF_LSA_MAXAGE); | |
2798 | ||
2799 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
2800 | { | |
e588f21f | 2801 | zlog_debug ("ospf_lsa_install() Premature Aging " |
7ddf1d6e | 2802 | "lsa 0x%lx", (u_long)lsa); |
2803 | ospf_lsa_header_dump (lsa->data); | |
2804 | } | |
2805 | } | |
2806 | else | |
2807 | { | |
2808 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
2809 | { | |
e588f21f | 2810 | zlog_debug ("ospf_lsa_install() got an lsa with seq 0x80000000 " |
7ddf1d6e | 2811 | "that was not self originated. Ignoring\n"); |
2812 | ospf_lsa_header_dump (lsa->data); | |
2813 | } | |
2814 | return old; | |
2815 | } | |
2816 | } | |
2817 | ||
718e3744 | 2818 | /* discard old LSA from LSDB */ |
2819 | if (old != NULL) | |
68980084 | 2820 | ospf_discard_from_db (ospf, lsdb, lsa); |
718e3744 | 2821 | |
718e3744 | 2822 | /* Calculate Checksum if self-originated?. */ |
2823 | if (IS_LSA_SELF (lsa)) | |
2824 | ospf_lsa_checksum (lsa->data); | |
2825 | ||
fe71a97d | 2826 | /* Insert LSA to LSDB. */ |
2827 | ospf_lsdb_add (lsdb, lsa); | |
2828 | lsa->lsdb = lsdb; | |
2829 | ||
718e3744 | 2830 | /* Do LSA specific installation process. */ |
2831 | switch (lsa->data->type) | |
2832 | { | |
2833 | case OSPF_ROUTER_LSA: | |
68980084 | 2834 | new = ospf_router_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2835 | break; |
2836 | case OSPF_NETWORK_LSA: | |
2837 | assert (oi); | |
68980084 | 2838 | new = ospf_network_lsa_install (ospf, oi, lsa, rt_recalc); |
718e3744 | 2839 | break; |
2840 | case OSPF_SUMMARY_LSA: | |
68980084 | 2841 | new = ospf_summary_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2842 | break; |
2843 | case OSPF_ASBR_SUMMARY_LSA: | |
68980084 | 2844 | new = ospf_summary_asbr_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2845 | break; |
2846 | case OSPF_AS_EXTERNAL_LSA: | |
68980084 | 2847 | new = ospf_external_lsa_install (ospf, lsa, rt_recalc); |
718e3744 | 2848 | break; |
2849 | #ifdef HAVE_OPAQUE_LSA | |
2850 | case OSPF_OPAQUE_LINK_LSA: | |
09e4efdc | 2851 | if (IS_LSA_SELF (lsa)) |
68980084 | 2852 | lsa->oi = oi; /* Specify outgoing ospf-interface for this LSA. */ |
09e4efdc | 2853 | else |
68980084 | 2854 | ; /* Incoming "oi" for this LSA has set at LSUpd reception. */ |
09e4efdc | 2855 | /* Fallthrough */ |
718e3744 | 2856 | case OSPF_OPAQUE_AREA_LSA: |
2857 | case OSPF_OPAQUE_AS_LSA: | |
2858 | new = ospf_opaque_lsa_install (lsa, rt_recalc); | |
2859 | break; | |
2860 | #endif /* HAVE_OPAQUE_LSA */ | |
d4a53d58 | 2861 | case OSPF_AS_NSSA_LSA: |
68980084 | 2862 | new = ospf_external_lsa_install (ospf, lsa, rt_recalc); |
d4a53d58 | 2863 | default: /* type-6,8,9....nothing special */ |
718e3744 | 2864 | break; |
2865 | } | |
2866 | ||
2867 | if (new == NULL) | |
2868 | return new; /* Installation failed, cannot proceed further -- endo. */ | |
2869 | ||
2870 | /* Debug logs. */ | |
2871 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) | |
2872 | { | |
2873 | char area_str[INET_ADDRSTRLEN]; | |
2874 | ||
2875 | switch (lsa->data->type) | |
2876 | { | |
2877 | case OSPF_AS_EXTERNAL_LSA: | |
2878 | #ifdef HAVE_OPAQUE_LSA | |
2879 | case OSPF_OPAQUE_AS_LSA: | |
2880 | #endif /* HAVE_OPAQUE_LSA */ | |
beebba75 | 2881 | case OSPF_AS_NSSA_LSA: |
e588f21f | 2882 | zlog_debug ("LSA[%s]: Install %s", |
718e3744 | 2883 | dump_lsa_key (new), |
2884 | LOOKUP (ospf_lsa_type_msg, new->data->type)); | |
2885 | break; | |
2886 | default: | |
2887 | strcpy (area_str, inet_ntoa (new->area->area_id)); | |
e588f21f | 2888 | zlog_debug ("LSA[%s]: Install %s to Area %s", |
718e3744 | 2889 | dump_lsa_key (new), |
2890 | LOOKUP (ospf_lsa_type_msg, new->data->type), area_str); | |
2891 | break; | |
2892 | } | |
2893 | } | |
2894 | ||
7ddf1d6e | 2895 | /* |
2896 | If received LSA' ls_age is MaxAge, or lsa is being prematurely aged | |
2897 | (it's getting flushed out of the area), set LSA on MaxAge LSA list. | |
2898 | */ | |
2899 | if ((lsa->flags & OSPF_LSA_PREMATURE_AGE) || | |
2900 | (IS_LSA_MAXAGE (new) && !IS_LSA_SELF (new))) | |
718e3744 | 2901 | { |
7ddf1d6e | 2902 | if (IS_DEBUG_OSPF (lsa, LSA_INSTALL)) |
e588f21f | 2903 | zlog_debug ("LSA[Type%d:%s]: Install LSA 0x%p, MaxAge", |
0c2be26c | 2904 | new->data->type, |
2905 | inet_ntoa (new->data->id), | |
2906 | lsa); | |
68980084 | 2907 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 2908 | } |
2909 | ||
2910 | return new; | |
2911 | } | |
2912 | ||
2913 | \f | |
4dadc291 | 2914 | static int |
68980084 | 2915 | ospf_check_nbr_status (struct ospf *ospf) |
718e3744 | 2916 | { |
1eb8ef25 | 2917 | struct listnode *node, *nnode; |
2918 | struct ospf_interface *oi; | |
2919 | ||
2920 | for (ALL_LIST_ELEMENTS (ospf->oiflist, node, nnode, oi)) | |
718e3744 | 2921 | { |
718e3744 | 2922 | struct route_node *rn; |
2923 | struct ospf_neighbor *nbr; | |
2924 | ||
2925 | if (ospf_if_is_enable (oi)) | |
2926 | for (rn = route_top (oi->nbrs); rn; rn = route_next (rn)) | |
2927 | if ((nbr = rn->info) != NULL) | |
2928 | if (nbr->state == NSM_Exchange || nbr->state == NSM_Loading) | |
2929 | { | |
2930 | route_unlock_node (rn); | |
2931 | return 0; | |
2932 | } | |
2933 | } | |
2934 | ||
2935 | return 1; | |
2936 | } | |
2937 | ||
2938 | \f | |
2939 | #ifdef ORIGINAL_CODING | |
2940 | /* This function flood the maxaged LSA to DR. */ | |
2941 | void | |
2942 | ospf_maxage_flood (struct ospf_lsa *lsa) | |
2943 | { | |
2944 | switch (lsa->data->type) | |
2945 | { | |
2946 | case OSPF_ROUTER_LSA: | |
2947 | case OSPF_NETWORK_LSA: | |
2948 | case OSPF_SUMMARY_LSA: | |
2949 | case OSPF_ASBR_SUMMARY_LSA: | |
718e3744 | 2950 | case OSPF_AS_NSSA_LSA: |
718e3744 | 2951 | #ifdef HAVE_OPAQUE_LSA |
2952 | case OSPF_OPAQUE_LINK_LSA: | |
2953 | case OSPF_OPAQUE_AREA_LSA: | |
2954 | #endif /* HAVE_OPAQUE_LSA */ | |
2955 | ospf_flood_through_area (lsa->area, NULL, lsa); | |
2956 | break; | |
2957 | case OSPF_AS_EXTERNAL_LSA: | |
2958 | #ifdef HAVE_OPAQUE_LSA | |
2959 | case OSPF_OPAQUE_AS_LSA: | |
2960 | #endif /* HAVE_OPAQUE_LSA */ | |
2961 | ospf_flood_through_as (NULL, lsa); | |
2962 | break; | |
2963 | default: | |
2964 | break; | |
2965 | } | |
2966 | } | |
2967 | #endif /* ORIGINAL_CODING */ | |
2968 | ||
4dadc291 | 2969 | static int |
718e3744 | 2970 | ospf_maxage_lsa_remover (struct thread *thread) |
2971 | { | |
68980084 | 2972 | struct ospf *ospf = THREAD_ARG (thread); |
1eb8ef25 | 2973 | struct ospf_lsa *lsa; |
2974 | struct listnode *node, *nnode; | |
718e3744 | 2975 | int reschedule = 0; |
2976 | ||
68980084 | 2977 | ospf->t_maxage = NULL; |
718e3744 | 2978 | |
2979 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2980 | zlog_debug ("LSA[MaxAge]: remover Start"); |
718e3744 | 2981 | |
68980084 | 2982 | reschedule = !ospf_check_nbr_status (ospf); |
718e3744 | 2983 | |
2984 | if (!reschedule) | |
1eb8ef25 | 2985 | for (ALL_LIST_ELEMENTS (ospf->maxage_lsa, node, nnode, lsa)) |
718e3744 | 2986 | { |
718e3744 | 2987 | if (lsa->retransmit_counter > 0) |
2988 | { | |
2989 | reschedule = 1; | |
2990 | continue; | |
2991 | } | |
2992 | ||
2993 | /* Remove LSA from the LSDB */ | |
2994 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF)) | |
2995 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 2996 | zlog_debug ("LSA[Type%d:%s]: LSA 0x%lx is self-oririnated: ", |
7ddf1d6e | 2997 | lsa->data->type, inet_ntoa (lsa->data->id), (u_long)lsa); |
718e3744 | 2998 | |
2999 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 3000 | zlog_debug ("LSA[Type%d:%s]: MaxAge LSA removed from list", |
718e3744 | 3001 | lsa->data->type, inet_ntoa (lsa->data->id)); |
3002 | ||
3003 | /* Flood max age LSA. */ | |
3004 | #ifdef ORIGINAL_CODING | |
3005 | ospf_maxage_flood (lsa); | |
3006 | #else /* ORIGINAL_CODING */ | |
68980084 | 3007 | ospf_flood_through (ospf, NULL, lsa); |
718e3744 | 3008 | #endif /* ORIGINAL_CODING */ |
3009 | ||
7ddf1d6e | 3010 | if (lsa->flags & OSPF_LSA_PREMATURE_AGE) |
3011 | { | |
3012 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 3013 | zlog_debug ("originating new router lsa for lsa 0x%lx \n", |
7ddf1d6e | 3014 | (u_long)lsa); |
3015 | ospf_router_lsa_originate(lsa->area); | |
3016 | } | |
3017 | ||
718e3744 | 3018 | /* Remove from lsdb. */ |
68980084 | 3019 | ospf_discard_from_db (ospf, lsa->lsdb, lsa); |
718e3744 | 3020 | ospf_lsdb_delete (lsa->lsdb, lsa); |
3021 | } | |
3022 | ||
3023 | /* A MaxAge LSA must be removed immediately from the router's link | |
3024 | state database as soon as both a) it is no longer contained on any | |
3025 | neighbor Link state retransmission lists and b) none of the router's | |
3026 | neighbors are in states Exchange or Loading. */ | |
3027 | if (reschedule) | |
68980084 | 3028 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, 2); |
718e3744 | 3029 | |
3030 | return 0; | |
3031 | } | |
3032 | ||
4dadc291 | 3033 | static int |
68980084 | 3034 | ospf_lsa_maxage_exist (struct ospf *ospf, struct ospf_lsa *new) |
718e3744 | 3035 | { |
52dc7ee6 | 3036 | struct listnode *node; |
1eb8ef25 | 3037 | struct ospf_lsa *lsa; |
3038 | ||
3039 | for (ALL_LIST_ELEMENTS_RO (ospf->maxage_lsa, node, lsa)) | |
3040 | if (lsa == new) | |
718e3744 | 3041 | return 1; |
3042 | ||
3043 | return 0; | |
3044 | } | |
3045 | ||
3046 | void | |
68980084 | 3047 | ospf_lsa_maxage_delete (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3048 | { |
52dc7ee6 | 3049 | struct listnode *n; |
718e3744 | 3050 | |
68980084 | 3051 | if ((n = listnode_lookup (ospf->maxage_lsa, lsa))) |
718e3744 | 3052 | { |
68980084 | 3053 | list_delete_node (ospf->maxage_lsa, n); |
718e3744 | 3054 | ospf_lsa_unlock (lsa); |
3055 | } | |
3056 | } | |
3057 | ||
3058 | void | |
68980084 | 3059 | ospf_lsa_maxage (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3060 | { |
3061 | /* When we saw a MaxAge LSA flooded to us, we put it on the list | |
3062 | and schedule the MaxAge LSA remover. */ | |
68980084 | 3063 | if (ospf_lsa_maxage_exist (ospf, lsa)) |
718e3744 | 3064 | { |
3065 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 3066 | zlog_debug ("LSA[Type%d:%s]: %p already exists on MaxAge LSA list", |
718e3744 | 3067 | lsa->data->type, inet_ntoa (lsa->data->id), lsa); |
3068 | return; | |
3069 | } | |
3070 | ||
68980084 | 3071 | listnode_add (ospf->maxage_lsa, ospf_lsa_lock (lsa)); |
718e3744 | 3072 | |
3073 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 3074 | zlog_debug ("LSA[%s]: MaxAge LSA remover scheduled.", dump_lsa_key (lsa)); |
718e3744 | 3075 | |
68980084 | 3076 | OSPF_TIMER_ON (ospf->t_maxage, ospf_maxage_lsa_remover, 2); |
718e3744 | 3077 | } |
3078 | ||
4dadc291 | 3079 | static int |
68980084 | 3080 | ospf_lsa_maxage_walker_remover (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3081 | { |
718e3744 | 3082 | /* Stay away from any Local Translated Type-7 LSAs */ |
3083 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
3084 | return 0; | |
718e3744 | 3085 | |
3086 | if (IS_LSA_MAXAGE (lsa)) | |
3087 | /* Self-originated LSAs should NOT time-out instead, | |
3088 | they're flushed and submitted to the max_age list explicitly. */ | |
68980084 | 3089 | if (!ospf_lsa_is_self_originated (ospf, lsa)) |
718e3744 | 3090 | { |
3091 | if (IS_DEBUG_OSPF (lsa, LSA_FLOODING)) | |
e588f21f | 3092 | zlog_debug("LSA[%s]: is MaxAge", dump_lsa_key (lsa)); |
718e3744 | 3093 | |
3094 | switch (lsa->data->type) | |
3095 | { | |
718e3744 | 3096 | #ifdef HAVE_OPAQUE_LSA |
37163d6d | 3097 | case OSPF_OPAQUE_LINK_LSA: |
3098 | case OSPF_OPAQUE_AREA_LSA: | |
718e3744 | 3099 | case OSPF_OPAQUE_AS_LSA: |
09e4efdc | 3100 | /* |
3101 | * As a general rule, whenever network topology has changed | |
3102 | * (due to an LSA removal in this case), routing recalculation | |
3103 | * should be triggered. However, this is not true for opaque | |
3104 | * LSAs. Even if an opaque LSA instance is going to be removed | |
3105 | * from the routing domain, it does not mean a change in network | |
3106 | * topology, and thus, routing recalculation is not needed here. | |
3107 | */ | |
3108 | break; | |
718e3744 | 3109 | #endif /* HAVE_OPAQUE_LSA */ |
09e4efdc | 3110 | case OSPF_AS_EXTERNAL_LSA: |
beebba75 | 3111 | case OSPF_AS_NSSA_LSA: |
68980084 | 3112 | ospf_ase_incremental_update (ospf, lsa); |
3113 | break; | |
718e3744 | 3114 | default: |
68980084 | 3115 | ospf_spf_calculate_schedule (ospf); |
3116 | break; | |
718e3744 | 3117 | } |
68980084 | 3118 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 3119 | } |
3120 | ||
3121 | return 0; | |
3122 | } | |
3123 | ||
3124 | /* Periodical check of MaxAge LSA. */ | |
3125 | int | |
68980084 | 3126 | ospf_lsa_maxage_walker (struct thread *thread) |
718e3744 | 3127 | { |
68980084 | 3128 | struct ospf *ospf = THREAD_ARG (thread); |
3129 | struct route_node *rn; | |
3130 | struct ospf_lsa *lsa; | |
1eb8ef25 | 3131 | struct ospf_area *area; |
3132 | struct listnode *node, *nnode; | |
718e3744 | 3133 | |
68980084 | 3134 | ospf->t_maxage_walker = NULL; |
718e3744 | 3135 | |
1eb8ef25 | 3136 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 3137 | { |
68980084 | 3138 | LSDB_LOOP (ROUTER_LSDB (area), rn, lsa) |
3139 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3140 | LSDB_LOOP (NETWORK_LSDB (area), rn, lsa) | |
3141 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3142 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) | |
3143 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3144 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
3145 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3146 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3147 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) |
3148 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
3149 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) | |
3150 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3151 | #endif /* HAVE_OPAQUE_LSA */ |
4fb949e3 | 3152 | LSDB_LOOP (NSSA_LSDB (area), rn, lsa) |
3153 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3154 | } |
3155 | ||
4fb949e3 | 3156 | /* for AS-external-LSAs. */ |
68980084 | 3157 | if (ospf->lsdb) |
3158 | { | |
3159 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) | |
3160 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3161 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3162 | LSDB_LOOP (OPAQUE_AS_LSDB (ospf), rn, lsa) |
3163 | ospf_lsa_maxage_walker_remover (ospf, lsa); | |
718e3744 | 3164 | #endif /* HAVE_OPAQUE_LSA */ |
68980084 | 3165 | } |
718e3744 | 3166 | |
68980084 | 3167 | OSPF_TIMER_ON (ospf->t_maxage_walker, ospf_lsa_maxage_walker, |
3168 | OSPF_LSA_MAXAGE_CHECK_INTERVAL); | |
718e3744 | 3169 | return 0; |
3170 | } | |
3171 | ||
68980084 | 3172 | struct ospf_lsa * |
3173 | ospf_lsa_lookup_by_prefix (struct ospf_lsdb *lsdb, u_char type, | |
3174 | struct prefix_ipv4 *p, struct in_addr router_id) | |
718e3744 | 3175 | { |
68980084 | 3176 | struct ospf_lsa *lsa; |
3177 | struct in_addr mask, id; | |
3178 | struct lsa_header_mask | |
3179 | { | |
3180 | struct lsa_header header; | |
3181 | struct in_addr mask; | |
3182 | } *hmask; | |
718e3744 | 3183 | |
68980084 | 3184 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, p->prefix, router_id); |
3185 | if (lsa == NULL) | |
3186 | return NULL; | |
718e3744 | 3187 | |
68980084 | 3188 | masklen2ip (p->prefixlen, &mask); |
718e3744 | 3189 | |
68980084 | 3190 | hmask = (struct lsa_header_mask *) lsa->data; |
718e3744 | 3191 | |
68980084 | 3192 | if (mask.s_addr != hmask->mask.s_addr) |
3193 | { | |
3194 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
3195 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, id, router_id); | |
3196 | if (!lsa) | |
3197 | return NULL; | |
3198 | } | |
718e3744 | 3199 | |
68980084 | 3200 | return lsa; |
718e3744 | 3201 | } |
3202 | ||
3203 | struct ospf_lsa * | |
3204 | ospf_lsa_lookup (struct ospf_area *area, u_int32_t type, | |
3205 | struct in_addr id, struct in_addr adv_router) | |
3206 | { | |
e05fba43 | 3207 | struct ospf *ospf = ospf_lookup(); |
3208 | assert(ospf); | |
3209 | ||
718e3744 | 3210 | switch (type) |
3211 | { | |
3212 | case OSPF_ROUTER_LSA: | |
3213 | case OSPF_NETWORK_LSA: | |
3214 | case OSPF_SUMMARY_LSA: | |
3215 | case OSPF_ASBR_SUMMARY_LSA: | |
718e3744 | 3216 | case OSPF_AS_NSSA_LSA: |
718e3744 | 3217 | #ifdef HAVE_OPAQUE_LSA |
3218 | case OSPF_OPAQUE_LINK_LSA: | |
3219 | case OSPF_OPAQUE_AREA_LSA: | |
3220 | #endif /* HAVE_OPAQUE_LSA */ | |
3221 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, adv_router); | |
718e3744 | 3222 | case OSPF_AS_EXTERNAL_LSA: |
3223 | #ifdef HAVE_OPAQUE_LSA | |
3224 | case OSPF_OPAQUE_AS_LSA: | |
3225 | #endif /* HAVE_OPAQUE_LSA */ | |
e05fba43 | 3226 | return ospf_lsdb_lookup_by_id (ospf->lsdb, type, id, adv_router); |
718e3744 | 3227 | default: |
3228 | break; | |
3229 | } | |
3230 | ||
3231 | return NULL; | |
3232 | } | |
3233 | ||
3234 | struct ospf_lsa * | |
3235 | ospf_lsa_lookup_by_id (struct ospf_area *area, u_int32_t type, | |
3236 | struct in_addr id) | |
3237 | { | |
3238 | struct ospf_lsa *lsa; | |
3239 | struct route_node *rn; | |
3240 | ||
3241 | switch (type) | |
3242 | { | |
3243 | case OSPF_ROUTER_LSA: | |
3244 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, id); | |
718e3744 | 3245 | case OSPF_NETWORK_LSA: |
3246 | for (rn = route_top (NETWORK_LSDB (area)); rn; rn = route_next (rn)) | |
3247 | if ((lsa = rn->info)) | |
3248 | if (IPV4_ADDR_SAME (&lsa->data->id, &id)) | |
3249 | { | |
3250 | route_unlock_node (rn); | |
3251 | return lsa; | |
3252 | } | |
3253 | break; | |
3254 | case OSPF_SUMMARY_LSA: | |
3255 | case OSPF_ASBR_SUMMARY_LSA: | |
3256 | /* Currently not used. */ | |
3257 | assert (1); | |
3258 | return ospf_lsdb_lookup_by_id (area->lsdb, type, id, id); | |
718e3744 | 3259 | case OSPF_AS_EXTERNAL_LSA: |
d4a53d58 | 3260 | case OSPF_AS_NSSA_LSA: |
718e3744 | 3261 | #ifdef HAVE_OPAQUE_LSA |
3262 | case OSPF_OPAQUE_LINK_LSA: | |
3263 | case OSPF_OPAQUE_AREA_LSA: | |
3264 | case OSPF_OPAQUE_AS_LSA: | |
3265 | /* Currently not used. */ | |
3266 | break; | |
3267 | #endif /* HAVE_OPAQUE_LSA */ | |
3268 | default: | |
3269 | break; | |
3270 | } | |
3271 | ||
3272 | return NULL; | |
3273 | } | |
3274 | ||
3275 | struct ospf_lsa * | |
3276 | ospf_lsa_lookup_by_header (struct ospf_area *area, struct lsa_header *lsah) | |
3277 | { | |
3278 | struct ospf_lsa *match; | |
3279 | ||
3280 | #ifdef HAVE_OPAQUE_LSA | |
3281 | /* | |
3282 | * Strictly speaking, the LSA-ID field for Opaque-LSAs (type-9/10/11) | |
3283 | * is redefined to have two subfields; opaque-type and opaque-id. | |
3284 | * However, it is harmless to treat the two sub fields together, as if | |
3285 | * they two were forming a unique LSA-ID. | |
3286 | */ | |
3287 | #endif /* HAVE_OPAQUE_LSA */ | |
3288 | ||
3289 | match = ospf_lsa_lookup (area, lsah->type, lsah->id, lsah->adv_router); | |
3290 | ||
3291 | if (match == NULL) | |
3292 | if (IS_DEBUG_OSPF (lsa, LSA) == OSPF_DEBUG_LSA) | |
e588f21f | 3293 | zlog_debug ("LSA[Type%d:%s]: Lookup by header, NO MATCH", |
718e3744 | 3294 | lsah->type, inet_ntoa (lsah->id)); |
3295 | ||
3296 | return match; | |
3297 | } | |
3298 | ||
3299 | /* return +n, l1 is more recent. | |
3300 | return -n, l2 is more recent. | |
3301 | return 0, l1 and l2 is identical. */ | |
3302 | int | |
3303 | ospf_lsa_more_recent (struct ospf_lsa *l1, struct ospf_lsa *l2) | |
3304 | { | |
3305 | int r; | |
3306 | int x, y; | |
3307 | ||
3308 | if (l1 == NULL && l2 == NULL) | |
3309 | return 0; | |
3310 | if (l1 == NULL) | |
3311 | return -1; | |
3312 | if (l2 == NULL) | |
3313 | return 1; | |
3314 | ||
3315 | /* compare LS sequence number. */ | |
3316 | x = (int) ntohl (l1->data->ls_seqnum); | |
3317 | y = (int) ntohl (l2->data->ls_seqnum); | |
3318 | if (x > y) | |
3319 | return 1; | |
3320 | if (x < y) | |
3321 | return -1; | |
3322 | ||
3323 | /* compare LS checksum. */ | |
3324 | r = ntohs (l1->data->checksum) - ntohs (l2->data->checksum); | |
3325 | if (r) | |
3326 | return r; | |
3327 | ||
3328 | /* compare LS age. */ | |
3329 | if (IS_LSA_MAXAGE (l1) && !IS_LSA_MAXAGE (l2)) | |
3330 | return 1; | |
3331 | else if (!IS_LSA_MAXAGE (l1) && IS_LSA_MAXAGE (l2)) | |
3332 | return -1; | |
3333 | ||
3334 | /* compare LS age with MaxAgeDiff. */ | |
3335 | if (LS_AGE (l1) - LS_AGE (l2) > OSPF_LSA_MAXAGE_DIFF) | |
3336 | return -1; | |
3337 | else if (LS_AGE (l2) - LS_AGE (l1) > OSPF_LSA_MAXAGE_DIFF) | |
3338 | return 1; | |
3339 | ||
3340 | /* LSAs are identical. */ | |
3341 | return 0; | |
3342 | } | |
3343 | ||
3344 | /* If two LSAs are different, return 1, otherwise return 0. */ | |
3345 | int | |
3346 | ospf_lsa_different (struct ospf_lsa *l1, struct ospf_lsa *l2) | |
3347 | { | |
3348 | char *p1, *p2; | |
3349 | assert (l1); | |
3350 | assert (l2); | |
3351 | assert (l1->data); | |
3352 | assert (l2->data); | |
3353 | ||
3354 | if (l1->data->options != l2->data->options) | |
3355 | return 1; | |
3356 | ||
3357 | if (IS_LSA_MAXAGE (l1) && !IS_LSA_MAXAGE (l2)) | |
3358 | return 1; | |
3359 | ||
3360 | if (IS_LSA_MAXAGE (l2) && !IS_LSA_MAXAGE (l1)) | |
3361 | return 1; | |
3362 | ||
3363 | if (l1->data->length != l2->data->length) | |
3364 | return 1; | |
3365 | ||
3366 | if (l1->data->length == 0) | |
3367 | return 1; | |
3368 | ||
d1825830 | 3369 | assert ( ntohs(l1->data->length) > OSPF_LSA_HEADER_SIZE); |
718e3744 | 3370 | |
3371 | p1 = (char *) l1->data; | |
3372 | p2 = (char *) l2->data; | |
3373 | ||
3374 | if (memcmp (p1 + OSPF_LSA_HEADER_SIZE, p2 + OSPF_LSA_HEADER_SIZE, | |
3375 | ntohs( l1->data->length ) - OSPF_LSA_HEADER_SIZE) != 0) | |
3376 | return 1; | |
3377 | ||
3378 | return 0; | |
3379 | } | |
3380 | ||
3381 | #ifdef ORIGINAL_CODING | |
3382 | void | |
3383 | ospf_lsa_flush_self_originated (struct ospf_neighbor *nbr, | |
3384 | struct ospf_lsa *self, | |
3385 | struct ospf_lsa *new) | |
3386 | { | |
3387 | u_int32_t seqnum; | |
3388 | ||
3389 | /* Adjust LS Sequence Number. */ | |
3390 | seqnum = ntohl (new->data->ls_seqnum) + 1; | |
3391 | self->data->ls_seqnum = htonl (seqnum); | |
3392 | ||
3393 | /* Recalculate LSA checksum. */ | |
3394 | ospf_lsa_checksum (self->data); | |
3395 | ||
3396 | /* Reflooding LSA. */ | |
3397 | /* RFC2328 Section 13.3 | |
3398 | On non-broadcast networks, separate Link State Update | |
3399 | packets must be sent, as unicasts, to each adjacent neighbor | |
3400 | (i.e., those in state Exchange or greater). The destination | |
3401 | IP addresses for these packets are the neighbors' IP | |
3402 | addresses. */ | |
3403 | if (nbr->oi->type == OSPF_IFTYPE_NBMA) | |
3404 | { | |
3405 | struct route_node *rn; | |
3406 | struct ospf_neighbor *onbr; | |
3407 | ||
3408 | for (rn = route_top (nbr->oi->nbrs); rn; rn = route_next (rn)) | |
3409 | if ((onbr = rn->info) != NULL) | |
3410 | if (onbr != nbr->oi->nbr_self && onbr->status >= NSM_Exchange) | |
3411 | ospf_ls_upd_send_lsa (onbr, self, OSPF_SEND_PACKET_DIRECT); | |
3412 | } | |
3413 | else | |
3414 | ospf_ls_upd_send_lsa (nbr, self, OSPF_SEND_PACKET_INDIRECT); | |
3415 | ||
3416 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3417 | zlog_debug ("LSA[Type%d:%s]: Flush self-originated LSA", |
718e3744 | 3418 | self->data->type, inet_ntoa (self->data->id)); |
3419 | } | |
3420 | #else /* ORIGINAL_CODING */ | |
3421 | static int | |
68980084 | 3422 | ospf_lsa_flush_schedule (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3423 | { |
3424 | if (lsa == NULL || !IS_LSA_SELF (lsa)) | |
3425 | return 0; | |
3426 | ||
3427 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 3428 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", lsa->data->type, inet_ntoa (lsa->data->id)); |
718e3744 | 3429 | |
3430 | /* Force given lsa's age to MaxAge. */ | |
3431 | lsa->data->ls_age = htons (OSPF_LSA_MAXAGE); | |
3432 | ||
3433 | switch (lsa->data->type) | |
3434 | { | |
3435 | #ifdef HAVE_OPAQUE_LSA | |
3436 | case OSPF_OPAQUE_LINK_LSA: | |
3437 | case OSPF_OPAQUE_AREA_LSA: | |
3438 | case OSPF_OPAQUE_AS_LSA: | |
3439 | ospf_opaque_lsa_refresh (lsa); | |
3440 | break; | |
3441 | #endif /* HAVE_OPAQUE_LSA */ | |
3442 | default: | |
68980084 | 3443 | ospf_lsa_maxage (ospf, lsa); |
718e3744 | 3444 | break; |
3445 | } | |
3446 | ||
3447 | return 0; | |
3448 | } | |
3449 | ||
3450 | void | |
68980084 | 3451 | ospf_flush_self_originated_lsas_now (struct ospf *ospf) |
718e3744 | 3452 | { |
1eb8ef25 | 3453 | struct listnode *node, *nnode; |
3454 | struct listnode *node2, *nnode2; | |
718e3744 | 3455 | struct ospf_area *area; |
3456 | struct ospf_interface *oi; | |
3457 | struct ospf_lsa *lsa; | |
68980084 | 3458 | struct route_node *rn; |
718e3744 | 3459 | int need_to_flush_ase = 0; |
3460 | ||
1eb8ef25 | 3461 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 3462 | { |
718e3744 | 3463 | if ((lsa = area->router_lsa_self) != NULL) |
3464 | { | |
3465 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 3466 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", lsa->data->type, inet_ntoa (lsa->data->id)); |
718e3744 | 3467 | |
3468 | ospf_lsa_flush_area (lsa, area); | |
3469 | ospf_lsa_unlock (area->router_lsa_self); | |
3470 | area->router_lsa_self = NULL; | |
3471 | OSPF_TIMER_OFF (area->t_router_lsa_self); | |
3472 | } | |
3473 | ||
1eb8ef25 | 3474 | for (ALL_LIST_ELEMENTS (area->oiflist, node2, nnode2, oi)) |
718e3744 | 3475 | { |
718e3744 | 3476 | if ((lsa = oi->network_lsa_self) != NULL |
1eb8ef25 | 3477 | && oi->state == ISM_DR |
3478 | && oi->full_nbrs > 0) | |
718e3744 | 3479 | { |
3480 | if (IS_DEBUG_OSPF_EVENT) | |
e588f21f | 3481 | zlog_debug ("LSA[Type%d:%s]: Schedule self-originated LSA to FLUSH", lsa->data->type, inet_ntoa (lsa->data->id)); |
718e3744 | 3482 | |
3483 | ospf_lsa_flush_area (oi->network_lsa_self, area); | |
3484 | ospf_lsa_unlock (oi->network_lsa_self); | |
3485 | oi->network_lsa_self = NULL; | |
3486 | OSPF_TIMER_OFF (oi->t_network_lsa_self); | |
3487 | } | |
3488 | ||
3489 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK | |
3490 | && area->external_routing == OSPF_AREA_DEFAULT) | |
3491 | need_to_flush_ase = 1; | |
3492 | } | |
3493 | ||
68980084 | 3494 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) |
3495 | ospf_lsa_flush_schedule (ospf, lsa); | |
3496 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
3497 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3498 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3499 | LSDB_LOOP (OPAQUE_LINK_LSDB (area), rn, lsa) |
3500 | ospf_lsa_flush_schedule (ospf, lsa); | |
3501 | LSDB_LOOP (OPAQUE_AREA_LSDB (area), rn, lsa) | |
3502 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3503 | #endif /* HAVE_OPAQUE_LSA */ |
3504 | } | |
3505 | ||
3506 | if (need_to_flush_ase) | |
3507 | { | |
68980084 | 3508 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) |
3509 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3510 | #ifdef HAVE_OPAQUE_LSA |
68980084 | 3511 | LSDB_LOOP (OPAQUE_AS_LSDB (ospf), rn, lsa) |
3512 | ospf_lsa_flush_schedule (ospf, lsa); | |
718e3744 | 3513 | #endif /* HAVE_OPAQUE_LSA */ |
3514 | } | |
3515 | ||
3516 | /* | |
3517 | * Make sure that the MaxAge LSA remover is executed immediately, | |
3518 | * without conflicting to other threads. | |
3519 | */ | |
68980084 | 3520 | if (ospf->t_maxage != NULL) |
718e3744 | 3521 | { |
68980084 | 3522 | OSPF_TIMER_OFF (ospf->t_maxage); |
3523 | thread_execute (master, ospf_maxage_lsa_remover, ospf, 0); | |
718e3744 | 3524 | } |
3525 | ||
3526 | return; | |
3527 | } | |
3528 | #endif /* ORIGINAL_CODING */ | |
3529 | ||
3530 | /* If there is self-originated LSA, then return 1, otherwise return 0. */ | |
3531 | /* An interface-independent version of ospf_lsa_is_self_originated */ | |
3532 | int | |
68980084 | 3533 | ospf_lsa_is_self_originated (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3534 | { |
52dc7ee6 | 3535 | struct listnode *node; |
1eb8ef25 | 3536 | struct ospf_interface *oi; |
718e3744 | 3537 | |
3538 | /* This LSA is already checked. */ | |
3539 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF_CHECKED)) | |
3540 | return CHECK_FLAG (lsa->flags, OSPF_LSA_SELF); | |
3541 | ||
3542 | /* Make sure LSA is self-checked. */ | |
3543 | SET_FLAG (lsa->flags, OSPF_LSA_SELF_CHECKED); | |
3544 | ||
3545 | /* AdvRouter and Router ID is the same. */ | |
68980084 | 3546 | if (IPV4_ADDR_SAME (&lsa->data->adv_router, &ospf->router_id)) |
718e3744 | 3547 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); |
3548 | ||
3549 | /* LSA is router-LSA. */ | |
3550 | else if (lsa->data->type == OSPF_ROUTER_LSA && | |
68980084 | 3551 | IPV4_ADDR_SAME (&lsa->data->id, &ospf->router_id)) |
718e3744 | 3552 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); |
3553 | ||
3554 | /* LSA is network-LSA. Compare Link ID with all interfaces. */ | |
3555 | else if (lsa->data->type == OSPF_NETWORK_LSA) | |
1eb8ef25 | 3556 | for (ALL_LIST_ELEMENTS_RO (ospf->oiflist, node, oi)) |
718e3744 | 3557 | { |
718e3744 | 3558 | /* Ignore virtual link. */ |
3559 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
3560 | if (oi->address->family == AF_INET) | |
3561 | if (IPV4_ADDR_SAME (&lsa->data->id, &oi->address->u.prefix4)) | |
3562 | { | |
3563 | /* to make it easier later */ | |
3564 | SET_FLAG (lsa->flags, OSPF_LSA_SELF); | |
3565 | return CHECK_FLAG (lsa->flags, OSPF_LSA_SELF); | |
3566 | } | |
3567 | } | |
3568 | ||
3569 | return CHECK_FLAG (lsa->flags, OSPF_LSA_SELF); | |
3570 | } | |
3571 | ||
3572 | /* Get unique Link State ID. */ | |
3573 | struct in_addr | |
68980084 | 3574 | ospf_lsa_unique_id (struct ospf *ospf, |
3575 | struct ospf_lsdb *lsdb, u_char type, struct prefix_ipv4 *p) | |
718e3744 | 3576 | { |
3577 | struct ospf_lsa *lsa; | |
3578 | struct in_addr mask, id; | |
3579 | ||
3580 | id = p->prefix; | |
3581 | ||
3582 | /* Check existence of LSA instance. */ | |
68980084 | 3583 | lsa = ospf_lsdb_lookup_by_id (lsdb, type, id, ospf->router_id); |
718e3744 | 3584 | if (lsa) |
3585 | { | |
3586 | struct as_external_lsa *al = (struct as_external_lsa *) lsa->data; | |
3587 | if (ip_masklen (al->mask) == p->prefixlen) | |
3588 | { | |
3589 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3590 | zlog_debug ("ospf_lsa_unique_id(): " |
718e3744 | 3591 | "Can't get Link State ID for %s/%d", |
3592 | inet_ntoa (p->prefix), p->prefixlen); | |
3593 | /* id.s_addr = 0; */ | |
3594 | id.s_addr = 0xffffffff; | |
3595 | return id; | |
3596 | } | |
3597 | /* Masklen differs, then apply wildcard mask to Link State ID. */ | |
3598 | else | |
3599 | { | |
3600 | masklen2ip (p->prefixlen, &mask); | |
3601 | ||
3602 | id.s_addr = p->prefix.s_addr | (~mask.s_addr); | |
68980084 | 3603 | lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, type, |
3604 | id, ospf->router_id); | |
718e3744 | 3605 | if (lsa) |
3606 | { | |
3607 | if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) | |
e588f21f | 3608 | zlog_debug ("ospf_lsa_unique_id(): " |
718e3744 | 3609 | "Can't get Link State ID for %s/%d", |
3610 | inet_ntoa (p->prefix), p->prefixlen); | |
3611 | /* id.s_addr = 0; */ | |
3612 | id.s_addr = 0xffffffff; | |
3613 | return id; | |
3614 | } | |
3615 | } | |
3616 | } | |
3617 | ||
3618 | return id; | |
3619 | } | |
3620 | ||
3621 | \f | |
3622 | #define LSA_ACTION_ORIGN_RTR 1 | |
3623 | #define LSA_ACTION_ORIGN_NET 2 | |
3624 | #define LSA_ACTION_FLOOD_AREA 3 | |
3625 | #define LSA_ACTION_FLOOD_AS 4 | |
3626 | #define LSA_ACTION_FLUSH_AREA 5 | |
3627 | #define LSA_ACTION_FLUSH_AS 6 | |
3628 | ||
3629 | struct lsa_action | |
3630 | { | |
3631 | u_char action; | |
3632 | struct ospf_area *area; | |
3633 | struct ospf_interface *oi; | |
3634 | struct ospf_lsa *lsa; | |
3635 | }; | |
3636 | ||
4dadc291 | 3637 | static int |
718e3744 | 3638 | ospf_lsa_action (struct thread *t) |
3639 | { | |
3640 | struct lsa_action *data; | |
020709f9 | 3641 | struct ospf *ospf; |
3642 | ||
3643 | ospf = ospf_lookup (); | |
718e3744 | 3644 | |
3645 | data = THREAD_ARG (t); | |
3646 | ||
3647 | if (IS_DEBUG_OSPF (lsa, LSA) == OSPF_DEBUG_LSA) | |
e588f21f | 3648 | zlog_debug ("LSA[Action]: Performing scheduled LSA action: %d", |
718e3744 | 3649 | data->action); |
3650 | ||
3651 | switch (data->action) | |
3652 | { | |
3653 | case LSA_ACTION_ORIGN_RTR: | |
3654 | ospf_router_lsa_refresh (data->area->router_lsa_self); | |
3655 | break; | |
3656 | case LSA_ACTION_ORIGN_NET: | |
3657 | ospf_network_lsa_originate (data->oi); | |
3658 | break; | |
3659 | case LSA_ACTION_FLOOD_AREA: | |
3660 | ospf_flood_through_area (data->area, NULL, data->lsa); | |
3661 | break; | |
3662 | case LSA_ACTION_FLOOD_AS: | |
68980084 | 3663 | ospf_flood_through_as (ospf, NULL, data->lsa); |
718e3744 | 3664 | break; |
3665 | case LSA_ACTION_FLUSH_AREA: | |
3666 | ospf_lsa_flush_area (data->lsa, data->area); | |
3667 | break; | |
3668 | case LSA_ACTION_FLUSH_AS: | |
68980084 | 3669 | ospf_lsa_flush_as (ospf, data->lsa); |
718e3744 | 3670 | break; |
3671 | } | |
3672 | ||
3673 | ospf_lsa_unlock (data->lsa); | |
3674 | XFREE (MTYPE_OSPF_MESSAGE, data); | |
3675 | return 0; | |
3676 | } | |
3677 | ||
3678 | void | |
3679 | ospf_schedule_lsa_flood_area (struct ospf_area *area, struct ospf_lsa *lsa) | |
3680 | { | |
3681 | struct lsa_action *data; | |
3682 | ||
3683 | data = XMALLOC (MTYPE_OSPF_MESSAGE, sizeof (struct lsa_action)); | |
3684 | memset (data, 0, sizeof (struct lsa_action)); | |
3685 | ||
3686 | data->action = LSA_ACTION_FLOOD_AREA; | |
3687 | data->area = area; | |
3688 | data->lsa = ospf_lsa_lock (lsa); | |
3689 | ||
3690 | thread_add_event (master, ospf_lsa_action, data, 0); | |
3691 | } | |
3692 | ||
3693 | void | |
3694 | ospf_schedule_lsa_flush_area (struct ospf_area *area, struct ospf_lsa *lsa) | |
3695 | { | |
3696 | struct lsa_action *data; | |
3697 | ||
3698 | data = XMALLOC (MTYPE_OSPF_MESSAGE, sizeof (struct lsa_action)); | |
3699 | memset (data, 0, sizeof (struct lsa_action)); | |
3700 | ||
3701 | data->action = LSA_ACTION_FLUSH_AREA; | |
3702 | data->area = area; | |
3703 | data->lsa = ospf_lsa_lock (lsa); | |
3704 | ||
3705 | thread_add_event (master, ospf_lsa_action, data, 0); | |
3706 | } | |
3707 | ||
3708 | \f | |
3709 | /* LSA Refreshment functions. */ | |
4dadc291 | 3710 | static void |
68980084 | 3711 | ospf_lsa_refresh (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3712 | { |
3713 | struct external_info *ei; | |
3714 | assert (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF)); | |
3715 | ||
3716 | switch (lsa->data->type) | |
3717 | { | |
3718 | /* Router and Network LSAs are processed differently. */ | |
3719 | case OSPF_ROUTER_LSA: | |
3720 | case OSPF_NETWORK_LSA: | |
3721 | break; | |
3722 | case OSPF_SUMMARY_LSA: | |
68980084 | 3723 | ospf_summary_lsa_refresh (ospf, lsa); |
718e3744 | 3724 | break; |
3725 | case OSPF_ASBR_SUMMARY_LSA: | |
68980084 | 3726 | ospf_summary_asbr_lsa_refresh (ospf, lsa); |
718e3744 | 3727 | break; |
3728 | case OSPF_AS_EXTERNAL_LSA: | |
d4a53d58 | 3729 | /* Translated from NSSA Type-5s are refreshed when |
3730 | * from refresh of Type-7 - do not refresh these directly. | |
3731 | */ | |
3732 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
3733 | break; | |
718e3744 | 3734 | ei = ospf_external_info_check (lsa); |
3735 | if (ei) | |
d4a53d58 | 3736 | ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_FORCE); |
718e3744 | 3737 | else |
d4a53d58 | 3738 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 3739 | break; |
3740 | #ifdef HAVE_OPAQUE_LSA | |
3741 | case OSPF_OPAQUE_LINK_LSA: | |
3742 | case OSPF_OPAQUE_AREA_LSA: | |
3743 | case OSPF_OPAQUE_AS_LSA: | |
3744 | ospf_opaque_lsa_refresh (lsa); | |
3745 | break; | |
d748032f | 3746 | #endif /* HAVE_OPAQUE_LSA */ |
718e3744 | 3747 | default: |
3748 | break; | |
718e3744 | 3749 | } |
3750 | } | |
3751 | ||
3752 | void | |
68980084 | 3753 | ospf_refresher_register_lsa (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3754 | { |
3755 | u_int16_t index, current_index; | |
3756 | ||
3757 | assert (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF)); | |
3758 | ||
3759 | if (lsa->refresh_list < 0) | |
3760 | { | |
3761 | int delay; | |
3762 | ||
3763 | if (LS_AGE (lsa) == 0 && | |
3764 | ntohl (lsa->data->ls_seqnum) == OSPF_INITIAL_SEQUENCE_NUMBER) | |
3765 | /* Randomize first update by OSPF_LS_REFRESH_SHIFT factor */ | |
3766 | delay = OSPF_LS_REFRESH_SHIFT + (random () % OSPF_LS_REFRESH_TIME); | |
3767 | else | |
3768 | /* Randomize another updates by +-OSPF_LS_REFRESH_JITTER factor */ | |
3769 | delay = OSPF_LS_REFRESH_TIME - LS_AGE (lsa) - OSPF_LS_REFRESH_JITTER | |
3770 | + (random () % (2*OSPF_LS_REFRESH_JITTER)); | |
3771 | ||
3772 | if (delay < 0) | |
3773 | delay = 0; | |
3774 | ||
68980084 | 3775 | current_index = ospf->lsa_refresh_queue.index + |
3776 | (time (NULL) - ospf->lsa_refresher_started)/OSPF_LSA_REFRESHER_GRANULARITY; | |
718e3744 | 3777 | |
3778 | index = (current_index + delay/OSPF_LSA_REFRESHER_GRANULARITY) | |
3779 | % (OSPF_LSA_REFRESHER_SLOTS); | |
3780 | ||
3781 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3782 | zlog_debug ("LSA[Refresh]: lsa %s with age %d added to index %d", |
d4a53d58 | 3783 | inet_ntoa (lsa->data->id), LS_AGE (lsa), index); |
68980084 | 3784 | if (!ospf->lsa_refresh_queue.qs[index]) |
3785 | ospf->lsa_refresh_queue.qs[index] = list_new (); | |
3786 | listnode_add (ospf->lsa_refresh_queue.qs[index], ospf_lsa_lock (lsa)); | |
718e3744 | 3787 | lsa->refresh_list = index; |
f2c80652 | 3788 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) |
e588f21f | 3789 | zlog_debug ("LSA[Refresh:%s]: ospf_refresher_register_lsa(): " |
d4a53d58 | 3790 | "setting refresh_list on lsa %p (slod %d)", |
3791 | inet_ntoa (lsa->data->id), lsa, index); | |
718e3744 | 3792 | } |
3793 | } | |
3794 | ||
3795 | void | |
68980084 | 3796 | ospf_refresher_unregister_lsa (struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 3797 | { |
3798 | assert (CHECK_FLAG (lsa->flags, OSPF_LSA_SELF)); | |
3799 | if (lsa->refresh_list >= 0) | |
3800 | { | |
52dc7ee6 | 3801 | struct list *refresh_list = ospf->lsa_refresh_queue.qs[lsa->refresh_list]; |
718e3744 | 3802 | listnode_delete (refresh_list, lsa); |
3803 | if (!listcount (refresh_list)) | |
3804 | { | |
3805 | list_free (refresh_list); | |
68980084 | 3806 | ospf->lsa_refresh_queue.qs[lsa->refresh_list] = NULL; |
718e3744 | 3807 | } |
3808 | ospf_lsa_unlock (lsa); | |
3809 | lsa->refresh_list = -1; | |
3810 | } | |
3811 | } | |
3812 | ||
3813 | int | |
3814 | ospf_lsa_refresh_walker (struct thread *t) | |
3815 | { | |
52dc7ee6 | 3816 | struct list *refresh_list; |
1eb8ef25 | 3817 | struct listnode *node, *nnode; |
68980084 | 3818 | struct ospf *ospf = THREAD_ARG (t); |
1eb8ef25 | 3819 | struct ospf_lsa *lsa; |
718e3744 | 3820 | int i; |
52dc7ee6 | 3821 | struct list *lsa_to_refresh = list_new (); |
718e3744 | 3822 | |
3823 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3824 | zlog_debug ("LSA[Refresh]:ospf_lsa_refresh_walker(): start"); |
718e3744 | 3825 | |
3826 | ||
68980084 | 3827 | i = ospf->lsa_refresh_queue.index; |
718e3744 | 3828 | |
9dbc7972 | 3829 | /* Note: if clock has jumped backwards, then time change could be negative, |
3830 | so we are careful to cast the expression to unsigned before taking | |
3831 | modulus. */ | |
68980084 | 3832 | ospf->lsa_refresh_queue.index = |
9dbc7972 | 3833 | ((unsigned long)(ospf->lsa_refresh_queue.index + |
3834 | (time (NULL) - ospf->lsa_refresher_started) / | |
3835 | OSPF_LSA_REFRESHER_GRANULARITY)) % OSPF_LSA_REFRESHER_SLOTS; | |
718e3744 | 3836 | |
3837 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3838 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): next index %d", |
68980084 | 3839 | ospf->lsa_refresh_queue.index); |
718e3744 | 3840 | |
68980084 | 3841 | for (;i != ospf->lsa_refresh_queue.index; |
718e3744 | 3842 | i = (i + 1) % OSPF_LSA_REFRESHER_SLOTS) |
3843 | { | |
3844 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3845 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): " |
d4a53d58 | 3846 | "refresh index %d", i); |
718e3744 | 3847 | |
68980084 | 3848 | refresh_list = ospf->lsa_refresh_queue.qs [i]; |
718e3744 | 3849 | |
68980084 | 3850 | ospf->lsa_refresh_queue.qs [i] = NULL; |
3851 | ||
718e3744 | 3852 | if (refresh_list) |
3853 | { | |
1eb8ef25 | 3854 | for (ALL_LIST_ELEMENTS (refresh_list, node, nnode, lsa)) |
718e3744 | 3855 | { |
718e3744 | 3856 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) |
e588f21f | 3857 | zlog_debug ("LSA[Refresh:%s]: ospf_lsa_refresh_walker(): " |
d4a53d58 | 3858 | "refresh lsa %p (slot %d)", |
3859 | inet_ntoa (lsa->data->id), lsa, i); | |
718e3744 | 3860 | |
3861 | list_delete_node (refresh_list, node); | |
3862 | ospf_lsa_unlock (lsa); | |
3863 | lsa->refresh_list = -1; | |
3864 | listnode_add (lsa_to_refresh, lsa); | |
718e3744 | 3865 | } |
3866 | list_free (refresh_list); | |
3867 | } | |
3868 | } | |
3869 | ||
68980084 | 3870 | ospf->t_lsa_refresher = thread_add_timer (master, ospf_lsa_refresh_walker, |
3871 | ospf, ospf->lsa_refresh_interval); | |
3872 | ospf->lsa_refresher_started = time (NULL); | |
718e3744 | 3873 | |
1eb8ef25 | 3874 | for (ALL_LIST_ELEMENTS (lsa_to_refresh, node, nnode, lsa)) |
3875 | ospf_lsa_refresh (ospf, lsa); | |
718e3744 | 3876 | |
3877 | list_delete (lsa_to_refresh); | |
3878 | ||
3879 | if (IS_DEBUG_OSPF (lsa, LSA_REFRESH)) | |
e588f21f | 3880 | zlog_debug ("LSA[Refresh]: ospf_lsa_refresh_walker(): end"); |
718e3744 | 3881 | |
3882 | return 0; | |
3883 | } | |
3884 |