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eb5d44eb | 1 | /* |
2 | * IS-IS Rout(e)ing protocol - isis_lsp.c | |
3 | * LSP processing | |
4 | * | |
5 | * Copyright (C) 2001,2002 Sampo Saaristo | |
d62a17ae | 6 | * Tampere University of Technology |
eb5d44eb | 7 | * Institute of Communications Engineering |
f3ccedaa | 8 | * Copyright (C) 2013-2015 Christian Franke <chris@opensourcerouting.org> |
eb5d44eb | 9 | * |
d62a17ae | 10 | * This program is free software; you can redistribute it and/or modify it |
11 | * under the terms of the GNU General Public License as published by the Free | |
12 | * Software Foundation; either version 2 of the License, or (at your option) | |
eb5d44eb | 13 | * any later version. |
14 | * | |
d62a17ae | 15 | * This program is distributed in the hope that it will be useful,but WITHOUT |
16 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
eb5d44eb | 18 | * more details. |
896014f4 DL |
19 | * |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; see the file COPYING; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
eb5d44eb | 23 | */ |
15935e9a | 24 | |
eb5d44eb | 25 | #include <zebra.h> |
eb5d44eb | 26 | |
27 | #include "linklist.h" | |
28 | #include "thread.h" | |
29 | #include "vty.h" | |
30 | #include "stream.h" | |
31 | #include "memory.h" | |
32 | #include "log.h" | |
33 | #include "prefix.h" | |
34 | #include "command.h" | |
35 | #include "hash.h" | |
36 | #include "if.h" | |
6a270cd9 | 37 | #include "checksum.h" |
3f045a08 | 38 | #include "md5.h" |
f3ccedaa | 39 | #include "table.h" |
eb5d44eb | 40 | |
41 | #include "isisd/dict.h" | |
42 | #include "isisd/isis_constants.h" | |
43 | #include "isisd/isis_common.h" | |
3f045a08 | 44 | #include "isisd/isis_flags.h" |
eb5d44eb | 45 | #include "isisd/isis_circuit.h" |
46 | #include "isisd/isisd.h" | |
eb5d44eb | 47 | #include "isisd/isis_lsp.h" |
48 | #include "isisd/isis_pdu.h" | |
49 | #include "isisd/isis_dynhn.h" | |
50 | #include "isisd/isis_misc.h" | |
eb5d44eb | 51 | #include "isisd/isis_csm.h" |
52 | #include "isisd/isis_adjacency.h" | |
53 | #include "isisd/isis_spf.h" | |
f8c06e2c | 54 | #include "isisd/isis_te.h" |
99894f9a | 55 | #include "isisd/isis_mt.h" |
841791b6 | 56 | #include "isisd/isis_tlvs.h" |
eb5d44eb | 57 | |
73d1aead | 58 | /* staticly assigned vars for printing purposes */ |
d62a17ae | 59 | char lsp_bits_string[200]; /* FIXME: enough ? */ |
73d1aead | 60 | |
d62a17ae | 61 | static int lsp_l1_refresh(struct thread *thread); |
62 | static int lsp_l2_refresh(struct thread *thread); | |
63 | static int lsp_l1_refresh_pseudo(struct thread *thread); | |
64 | static int lsp_l2_refresh_pseudo(struct thread *thread); | |
3f045a08 | 65 | |
d62a17ae | 66 | int lsp_id_cmp(u_char *id1, u_char *id2) |
f390d2c7 | 67 | { |
d62a17ae | 68 | return memcmp(id1, id2, ISIS_SYS_ID_LEN + 2); |
eb5d44eb | 69 | } |
70 | ||
d62a17ae | 71 | dict_t *lsp_db_init(void) |
eb5d44eb | 72 | { |
d62a17ae | 73 | dict_t *dict; |
f390d2c7 | 74 | |
d62a17ae | 75 | dict = dict_create(DICTCOUNT_T_MAX, (dict_comp_t)lsp_id_cmp); |
f390d2c7 | 76 | |
d62a17ae | 77 | return dict; |
eb5d44eb | 78 | } |
79 | ||
d62a17ae | 80 | struct isis_lsp *lsp_search(u_char *id, dict_t *lspdb) |
eb5d44eb | 81 | { |
d62a17ae | 82 | dnode_t *node; |
eb5d44eb | 83 | |
f390d2c7 | 84 | #ifdef EXTREME_DEBUG |
d62a17ae | 85 | dnode_t *dn; |
86 | ||
87 | zlog_debug("searching db"); | |
88 | for (dn = dict_first(lspdb); dn; dn = dict_next(lspdb, dn)) { | |
89 | zlog_debug("%s\t%pX", | |
90 | rawlspid_print((u_char *)dnode_getkey(dn)), | |
91 | dnode_get(dn)); | |
92 | } | |
eb5d44eb | 93 | #endif /* EXTREME DEBUG */ |
94 | ||
d62a17ae | 95 | node = dict_lookup(lspdb, id); |
f390d2c7 | 96 | |
d62a17ae | 97 | if (node) |
98 | return (struct isis_lsp *)dnode_get(node); | |
eb5d44eb | 99 | |
d62a17ae | 100 | return NULL; |
eb5d44eb | 101 | } |
102 | ||
d62a17ae | 103 | static void lsp_clear_data(struct isis_lsp *lsp) |
eb5d44eb | 104 | { |
d62a17ae | 105 | if (!lsp) |
106 | return; | |
107 | ||
af8ac8f9 CF |
108 | isis_free_tlvs(lsp->tlvs); |
109 | lsp->tlvs = NULL; | |
eb5d44eb | 110 | } |
111 | ||
d62a17ae | 112 | static void lsp_destroy(struct isis_lsp *lsp) |
eb5d44eb | 113 | { |
58e16237 | 114 | struct listnode *cnode; |
d62a17ae | 115 | struct isis_circuit *circuit; |
116 | ||
117 | if (!lsp) | |
118 | return; | |
119 | ||
58e16237 CF |
120 | for (ALL_LIST_ELEMENTS_RO(lsp->area->circuit_list, cnode, circuit)) |
121 | isis_circuit_cancel_queued_lsp(circuit, lsp); | |
122 | ||
d62a17ae | 123 | ISIS_FLAGS_CLEAR_ALL(lsp->SSNflags); |
124 | ISIS_FLAGS_CLEAR_ALL(lsp->SRMflags); | |
125 | ||
126 | lsp_clear_data(lsp); | |
127 | ||
af8ac8f9 | 128 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) == 0 && lsp->lspu.frags) { |
affe9e99 | 129 | list_delete_and_null(&lsp->lspu.frags); |
d62a17ae | 130 | lsp->lspu.frags = NULL; |
131 | } | |
132 | ||
133 | isis_spf_schedule(lsp->area, lsp->level); | |
134 | ||
135 | if (lsp->pdu) | |
136 | stream_free(lsp->pdu); | |
137 | XFREE(MTYPE_ISIS_LSP, lsp); | |
eb5d44eb | 138 | } |
139 | ||
d62a17ae | 140 | void lsp_db_destroy(dict_t *lspdb) |
eb5d44eb | 141 | { |
d62a17ae | 142 | dnode_t *dnode, *next; |
143 | struct isis_lsp *lsp; | |
144 | ||
145 | dnode = dict_first(lspdb); | |
146 | while (dnode) { | |
147 | next = dict_next(lspdb, dnode); | |
148 | lsp = dnode_get(dnode); | |
149 | lsp_destroy(lsp); | |
150 | dict_delete_free(lspdb, dnode); | |
151 | dnode = next; | |
152 | } | |
153 | ||
154 | dict_free(lspdb); | |
155 | ||
156 | return; | |
eb5d44eb | 157 | } |
158 | ||
159 | /* | |
160 | * Remove all the frags belonging to the given lsp | |
161 | */ | |
d62a17ae | 162 | static void lsp_remove_frags(struct list *frags, dict_t *lspdb) |
eb5d44eb | 163 | { |
d62a17ae | 164 | dnode_t *dnode; |
165 | struct listnode *lnode, *lnnode; | |
166 | struct isis_lsp *lsp; | |
167 | ||
168 | for (ALL_LIST_ELEMENTS(frags, lnode, lnnode, lsp)) { | |
af8ac8f9 | 169 | dnode = dict_lookup(lspdb, lsp->hdr.lsp_id); |
d62a17ae | 170 | lsp_destroy(lsp); |
171 | dnode_destroy(dict_delete(lspdb, dnode)); | |
172 | } | |
f390d2c7 | 173 | |
d62a17ae | 174 | list_delete_all_node(frags); |
f390d2c7 | 175 | |
d62a17ae | 176 | return; |
eb5d44eb | 177 | } |
178 | ||
d62a17ae | 179 | void lsp_search_and_destroy(u_char *id, dict_t *lspdb) |
eb5d44eb | 180 | { |
d62a17ae | 181 | dnode_t *node; |
182 | struct isis_lsp *lsp; | |
183 | ||
184 | node = dict_lookup(lspdb, id); | |
185 | if (node) { | |
186 | node = dict_delete(lspdb, node); | |
187 | lsp = dnode_get(node); | |
188 | /* | |
189 | * If this is a zero lsp, remove all the frags now | |
190 | */ | |
af8ac8f9 | 191 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) == 0) { |
d62a17ae | 192 | if (lsp->lspu.frags) |
193 | lsp_remove_frags(lsp->lspu.frags, lspdb); | |
194 | } else { | |
195 | /* | |
196 | * else just remove this frag, from the zero lsps' frag | |
197 | * list | |
198 | */ | |
199 | if (lsp->lspu.zero_lsp | |
200 | && lsp->lspu.zero_lsp->lspu.frags) | |
201 | listnode_delete(lsp->lspu.zero_lsp->lspu.frags, | |
202 | lsp); | |
203 | } | |
204 | lsp_destroy(lsp); | |
205 | dnode_destroy(node); | |
206 | } | |
eb5d44eb | 207 | } |
208 | ||
209 | /* | |
210 | * Compares a LSP to given values | |
211 | * Params are given in net order | |
212 | */ | |
af8ac8f9 CF |
213 | int lsp_compare(char *areatag, struct isis_lsp *lsp, uint32_t seqno, |
214 | uint16_t checksum, uint16_t rem_lifetime) | |
eb5d44eb | 215 | { |
af8ac8f9 CF |
216 | if (lsp->hdr.seqno == seqno && lsp->hdr.checksum == checksum |
217 | && ((lsp->hdr.rem_lifetime == 0 && rem_lifetime == 0) | |
218 | || (lsp->hdr.rem_lifetime != 0 && rem_lifetime != 0))) { | |
d62a17ae | 219 | if (isis->debugs & DEBUG_SNP_PACKETS) { |
220 | zlog_debug( | |
af8ac8f9 CF |
221 | "ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32 |
222 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
223 | "s", | |
224 | areatag, rawlspid_print(lsp->hdr.lsp_id), | |
225 | lsp->hdr.seqno, lsp->hdr.checksum, | |
226 | lsp->hdr.rem_lifetime); | |
d62a17ae | 227 | zlog_debug( |
af8ac8f9 CF |
228 | "ISIS-Snp (%s): is equal to ours seq 0x%08" PRIx32 |
229 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
230 | "s", | |
231 | areatag, seqno, checksum, rem_lifetime); | |
d62a17ae | 232 | } |
233 | return LSP_EQUAL; | |
234 | } | |
235 | ||
236 | /* | |
237 | * LSPs with identical checksums should only be treated as newer if: | |
238 | * a) The current LSP has a remaining lifetime != 0 and the other LSP | |
239 | * has a | |
240 | * remaining lifetime == 0. In this case, we should participate in | |
241 | * the purge | |
242 | * and should not treat the current LSP with remaining lifetime == 0 | |
243 | * as older. | |
244 | * b) The LSP has an incorrect checksum. In this case, we need to react | |
245 | * as given | |
246 | * in 7.3.16.2. | |
247 | */ | |
af8ac8f9 CF |
248 | if (seqno > lsp->hdr.seqno |
249 | || (seqno == lsp->hdr.seqno | |
250 | && ((lsp->hdr.rem_lifetime != 0 && rem_lifetime == 0) | |
251 | || lsp->hdr.checksum != checksum))) { | |
d62a17ae | 252 | if (isis->debugs & DEBUG_SNP_PACKETS) { |
253 | zlog_debug( | |
af8ac8f9 CF |
254 | "ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32 |
255 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
256 | "s", | |
257 | areatag, rawlspid_print(lsp->hdr.lsp_id), seqno, | |
258 | checksum, rem_lifetime); | |
d62a17ae | 259 | zlog_debug( |
af8ac8f9 CF |
260 | "ISIS-Snp (%s): is newer than ours seq 0x%08" PRIx32 |
261 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
262 | "s", | |
263 | areatag, lsp->hdr.seqno, lsp->hdr.checksum, | |
264 | lsp->hdr.rem_lifetime); | |
d62a17ae | 265 | } |
266 | return LSP_NEWER; | |
267 | } | |
268 | if (isis->debugs & DEBUG_SNP_PACKETS) { | |
af8ac8f9 CF |
269 | zlog_debug("ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32 |
270 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s", | |
271 | areatag, rawlspid_print(lsp->hdr.lsp_id), seqno, | |
272 | checksum, rem_lifetime); | |
d62a17ae | 273 | zlog_debug( |
af8ac8f9 CF |
274 | "ISIS-Snp (%s): is older than ours seq 0x%08" PRIx32 |
275 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s", | |
276 | areatag, lsp->hdr.seqno, lsp->hdr.checksum, | |
277 | lsp->hdr.rem_lifetime); | |
d62a17ae | 278 | } |
279 | ||
280 | return LSP_OLDER; | |
eb5d44eb | 281 | } |
282 | ||
c55018ab | 283 | static void put_lsp_hdr(struct isis_lsp *lsp, size_t *len_pointer, bool keep) |
3f045a08 | 284 | { |
af8ac8f9 CF |
285 | uint8_t pdu_type = |
286 | (lsp->level == IS_LEVEL_1) ? L1_LINK_STATE : L2_LINK_STATE; | |
287 | struct isis_lsp_hdr *hdr = &lsp->hdr; | |
288 | struct stream *stream = lsp->pdu; | |
c55018ab CF |
289 | size_t orig_getp, orig_endp; |
290 | ||
291 | if (keep) { | |
292 | orig_getp = stream_get_getp(lsp->pdu); | |
293 | orig_endp = stream_get_endp(lsp->pdu); | |
294 | } | |
295 | ||
296 | stream_set_getp(lsp->pdu, 0); | |
297 | stream_set_endp(lsp->pdu, 0); | |
af8ac8f9 CF |
298 | |
299 | fill_fixed_hdr(pdu_type, stream); | |
300 | ||
301 | if (len_pointer) | |
302 | *len_pointer = stream_get_endp(stream); | |
303 | stream_putw(stream, hdr->pdu_len); | |
304 | stream_putw(stream, hdr->rem_lifetime); | |
305 | stream_put(stream, hdr->lsp_id, sizeof(hdr->lsp_id)); | |
306 | stream_putl(stream, hdr->seqno); | |
307 | stream_putw(stream, hdr->checksum); | |
308 | stream_putc(stream, hdr->lsp_bits); | |
c55018ab CF |
309 | |
310 | if (keep) { | |
311 | stream_set_endp(lsp->pdu, orig_endp); | |
312 | stream_set_getp(lsp->pdu, orig_getp); | |
313 | } | |
3f045a08 JB |
314 | } |
315 | ||
af8ac8f9 | 316 | static void lsp_add_auth(struct isis_lsp *lsp) |
3f045a08 | 317 | { |
d62a17ae | 318 | struct isis_passwd *passwd; |
af8ac8f9 CF |
319 | passwd = (lsp->level == IS_LEVEL_1) ? &lsp->area->area_passwd |
320 | : &lsp->area->domain_passwd; | |
321 | isis_tlvs_add_auth(lsp->tlvs, passwd); | |
322 | } | |
d62a17ae | 323 | |
af8ac8f9 CF |
324 | static void lsp_pack_pdu(struct isis_lsp *lsp) |
325 | { | |
326 | if (!lsp->tlvs) | |
327 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 328 | |
af8ac8f9 | 329 | lsp_add_auth(lsp); |
d62a17ae | 330 | |
af8ac8f9 | 331 | size_t len_pointer; |
c55018ab | 332 | put_lsp_hdr(lsp, &len_pointer, false); |
af8ac8f9 CF |
333 | isis_pack_tlvs(lsp->tlvs, lsp->pdu, len_pointer, false, true); |
334 | ||
335 | lsp->hdr.pdu_len = stream_get_endp(lsp->pdu); | |
336 | lsp->hdr.checksum = | |
337 | ntohs(fletcher_checksum(STREAM_DATA(lsp->pdu) + 12, | |
338 | stream_get_endp(lsp->pdu) - 12, 12)); | |
3f045a08 JB |
339 | } |
340 | ||
af8ac8f9 | 341 | void lsp_inc_seqno(struct isis_lsp *lsp, uint32_t seqno) |
eb5d44eb | 342 | { |
af8ac8f9 | 343 | uint32_t newseq; |
d62a17ae | 344 | |
af8ac8f9 CF |
345 | if (seqno == 0 || lsp->hdr.seqno > seqno) |
346 | newseq = lsp->hdr.seqno + 1; | |
d62a17ae | 347 | else |
af8ac8f9 | 348 | newseq = seqno + 1; |
d62a17ae | 349 | |
af8ac8f9 CF |
350 | lsp->hdr.seqno = newseq; |
351 | ||
352 | lsp_pack_pdu(lsp); | |
d62a17ae | 353 | isis_spf_schedule(lsp->area, lsp->level); |
af8ac8f9 | 354 | } |
d62a17ae | 355 | |
af8ac8f9 CF |
356 | static void lsp_purge(struct isis_lsp *lsp, int level) |
357 | { | |
358 | /* reset stream */ | |
359 | lsp_clear_data(lsp); | |
360 | stream_reset(lsp->pdu); | |
361 | ||
362 | /* update header */ | |
363 | lsp->hdr.checksum = 0; | |
364 | lsp->hdr.rem_lifetime = 0; | |
365 | lsp->level = level; | |
366 | lsp->age_out = lsp->area->max_lsp_lifetime[level - 1]; | |
367 | ||
368 | lsp_pack_pdu(lsp); | |
369 | lsp_set_all_srmflags(lsp); | |
eb5d44eb | 370 | } |
371 | ||
372 | /* | |
af8ac8f9 | 373 | * Generates checksum for LSP and its frags |
eb5d44eb | 374 | */ |
af8ac8f9 | 375 | static void lsp_seqno_update(struct isis_lsp *lsp0) |
eb5d44eb | 376 | { |
d62a17ae | 377 | struct isis_lsp *lsp; |
378 | struct listnode *node; | |
f390d2c7 | 379 | |
af8ac8f9 | 380 | lsp_inc_seqno(lsp0, 0); |
eb5d44eb | 381 | |
d62a17ae | 382 | if (!lsp0->lspu.frags) |
383 | return; | |
eb5d44eb | 384 | |
af8ac8f9 CF |
385 | for (ALL_LIST_ELEMENTS_RO(lsp0->lspu.frags, node, lsp)) { |
386 | if (lsp->tlvs) | |
387 | lsp_inc_seqno(lsp, 0); | |
388 | else | |
389 | lsp_purge(lsp, lsp0->level); | |
390 | } | |
f390d2c7 | 391 | |
d62a17ae | 392 | return; |
eb5d44eb | 393 | } |
394 | ||
d62a17ae | 395 | static u_int8_t lsp_bits_generate(int level, int overload_bit, int attached_bit) |
e38e0df0 | 396 | { |
d62a17ae | 397 | u_int8_t lsp_bits = 0; |
398 | if (level == IS_LEVEL_1) | |
399 | lsp_bits = IS_LEVEL_1; | |
400 | else | |
401 | lsp_bits = IS_LEVEL_1_AND_2; | |
402 | if (overload_bit) | |
403 | lsp_bits |= overload_bit; | |
404 | if (attached_bit) | |
405 | lsp_bits |= attached_bit; | |
406 | return lsp_bits; | |
e38e0df0 SV |
407 | } |
408 | ||
af8ac8f9 CF |
409 | static void lsp_update_data(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr, |
410 | struct isis_tlvs *tlvs, struct stream *stream, | |
d62a17ae | 411 | struct isis_area *area, int level) |
eb5d44eb | 412 | { |
d62a17ae | 413 | /* free the old lsp data */ |
414 | lsp_clear_data(lsp); | |
415 | ||
416 | /* copying only the relevant part of our stream */ | |
417 | if (lsp->pdu != NULL) | |
418 | stream_free(lsp->pdu); | |
419 | lsp->pdu = stream_dup(stream); | |
420 | ||
af8ac8f9 | 421 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
d62a17ae | 422 | lsp->area = area; |
423 | lsp->level = level; | |
424 | lsp->age_out = ZERO_AGE_LIFETIME; | |
425 | lsp->installed = time(NULL); | |
d62a17ae | 426 | |
af8ac8f9 CF |
427 | lsp->tlvs = tlvs; |
428 | ||
429 | if (area->dynhostname && lsp->tlvs->hostname) { | |
430 | isis_dynhn_insert(lsp->hdr.lsp_id, lsp->tlvs->hostname, | |
431 | (lsp->hdr.lsp_bits & LSPBIT_IST) | |
d62a17ae | 432 | == IS_LEVEL_1_AND_2 |
433 | ? IS_LEVEL_2 | |
434 | : IS_LEVEL_1); | |
435 | } | |
436 | ||
437 | return; | |
eb5d44eb | 438 | } |
439 | ||
0b8b6cab CF |
440 | static void lsp_link_fragment(struct isis_lsp *lsp, struct isis_lsp *lsp0) |
441 | { | |
442 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) { | |
443 | /* zero lsp -> create list to store fragments */ | |
444 | lsp->lspu.frags = list_new(); | |
445 | } else { | |
446 | /* fragment -> set backpointer and add to zero lsps list */ | |
447 | assert(lsp0); | |
448 | lsp->lspu.zero_lsp = lsp0; | |
449 | listnode_add(lsp0->lspu.frags, lsp); | |
450 | } | |
451 | } | |
452 | ||
af8ac8f9 CF |
453 | void lsp_update(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr, |
454 | struct isis_tlvs *tlvs, struct stream *stream, | |
164066e4 | 455 | struct isis_area *area, int level, bool confusion) |
eb5d44eb | 456 | { |
d62a17ae | 457 | if (lsp->own_lsp) { |
458 | zlog_err( | |
459 | "ISIS-Upd (%s): BUG updating LSP %s still marked as own LSP", | |
af8ac8f9 | 460 | area->area_tag, rawlspid_print(lsp->hdr.lsp_id)); |
d62a17ae | 461 | lsp_clear_data(lsp); |
462 | lsp->own_lsp = 0; | |
463 | } | |
464 | ||
c55018ab | 465 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); |
164066e4 | 466 | if (confusion) { |
c55018ab CF |
467 | lsp->hdr.rem_lifetime = hdr->rem_lifetime = 0; |
468 | put_lsp_hdr(lsp, NULL, true); | |
164066e4 | 469 | } |
d62a17ae | 470 | |
0b8b6cab CF |
471 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) && !lsp->lspu.zero_lsp) { |
472 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
473 | struct isis_lsp *lsp0; | |
eb5d44eb | 474 | |
0b8b6cab CF |
475 | memcpy(lspid, lsp->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); |
476 | LSP_FRAGMENT(lspid) = 0; | |
477 | lsp0 = lsp_search(lspid, area->lspdb[level - 1]); | |
478 | if (lsp0) | |
479 | lsp_link_fragment(lsp, lsp0); | |
8f5dbe18 | 480 | } |
0b8b6cab | 481 | |
5304211a CF |
482 | if (lsp->hdr.seqno) |
483 | isis_spf_schedule(lsp->area, lsp->level); | |
8f5dbe18 CF |
484 | } |
485 | ||
eb5d44eb | 486 | /* creation of LSP directly from what we received */ |
af8ac8f9 CF |
487 | struct isis_lsp *lsp_new_from_recv(struct isis_lsp_hdr *hdr, |
488 | struct isis_tlvs *tlvs, | |
489 | struct stream *stream, struct isis_lsp *lsp0, | |
490 | struct isis_area *area, int level) | |
eb5d44eb | 491 | { |
d62a17ae | 492 | struct isis_lsp *lsp; |
493 | ||
494 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
af8ac8f9 | 495 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); |
8f5dbe18 | 496 | lsp_link_fragment(lsp, lsp0); |
d62a17ae | 497 | |
498 | return lsp; | |
eb5d44eb | 499 | } |
500 | ||
d62a17ae | 501 | struct isis_lsp *lsp_new(struct isis_area *area, u_char *lsp_id, |
af8ac8f9 | 502 | uint16_t rem_lifetime, uint32_t seqno, |
8f5dbe18 CF |
503 | uint8_t lsp_bits, uint16_t checksum, |
504 | struct isis_lsp *lsp0, int level) | |
eb5d44eb | 505 | { |
d62a17ae | 506 | struct isis_lsp *lsp; |
507 | ||
508 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
509 | lsp->area = area; | |
510 | ||
511 | lsp->pdu = stream_new(LLC_LEN + area->lsp_mtu); | |
d62a17ae | 512 | |
d62a17ae | 513 | /* Minimal LSP PDU size */ |
af8ac8f9 CF |
514 | lsp->hdr.pdu_len = ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN; |
515 | memcpy(lsp->hdr.lsp_id, lsp_id, sizeof(lsp->hdr.lsp_id)); | |
516 | lsp->hdr.checksum = checksum; | |
517 | lsp->hdr.seqno = seqno; | |
518 | lsp->hdr.rem_lifetime = rem_lifetime; | |
519 | lsp->hdr.lsp_bits = lsp_bits; | |
d62a17ae | 520 | lsp->level = level; |
521 | lsp->age_out = ZERO_AGE_LIFETIME; | |
8f5dbe18 | 522 | lsp_link_fragment(lsp, lsp0); |
c55018ab | 523 | put_lsp_hdr(lsp, NULL, false); |
d62a17ae | 524 | |
525 | if (isis->debugs & DEBUG_EVENTS) | |
526 | zlog_debug("New LSP with ID %s-%02x-%02x len %d seqnum %08x", | |
af8ac8f9 CF |
527 | sysid_print(lsp_id), LSP_PSEUDO_ID(lsp->hdr.lsp_id), |
528 | LSP_FRAGMENT(lsp->hdr.lsp_id), lsp->hdr.pdu_len, | |
529 | lsp->hdr.seqno); | |
d62a17ae | 530 | |
531 | return lsp; | |
eb5d44eb | 532 | } |
533 | ||
d62a17ae | 534 | void lsp_insert(struct isis_lsp *lsp, dict_t *lspdb) |
eb5d44eb | 535 | { |
af8ac8f9 CF |
536 | dict_alloc_insert(lspdb, lsp->hdr.lsp_id, lsp); |
537 | if (lsp->hdr.seqno) | |
d62a17ae | 538 | isis_spf_schedule(lsp->area, lsp->level); |
eb5d44eb | 539 | } |
540 | ||
541 | /* | |
542 | * Build a list of LSPs with non-zero ht bounded by start and stop ids | |
543 | */ | |
d62a17ae | 544 | void lsp_build_list_nonzero_ht(u_char *start_id, u_char *stop_id, |
545 | struct list *list, dict_t *lspdb) | |
eb5d44eb | 546 | { |
d62a17ae | 547 | dnode_t *first, *last, *curr; |
eb5d44eb | 548 | |
d62a17ae | 549 | first = dict_lower_bound(lspdb, start_id); |
550 | if (!first) | |
551 | return; | |
f390d2c7 | 552 | |
d62a17ae | 553 | last = dict_upper_bound(lspdb, stop_id); |
f390d2c7 | 554 | |
d62a17ae | 555 | curr = first; |
f390d2c7 | 556 | |
af8ac8f9 | 557 | if (((struct isis_lsp *)(curr->dict_data))->hdr.rem_lifetime) |
d62a17ae | 558 | listnode_add(list, first->dict_data); |
eb5d44eb | 559 | |
d62a17ae | 560 | while (curr) { |
561 | curr = dict_next(lspdb, curr); | |
562 | if (curr | |
af8ac8f9 | 563 | && ((struct isis_lsp *)(curr->dict_data))->hdr.rem_lifetime) |
d62a17ae | 564 | listnode_add(list, curr->dict_data); |
565 | if (curr == last) | |
566 | break; | |
567 | } | |
f390d2c7 | 568 | |
d62a17ae | 569 | return; |
eb5d44eb | 570 | } |
571 | ||
d62a17ae | 572 | static void lsp_set_time(struct isis_lsp *lsp) |
eb5d44eb | 573 | { |
d62a17ae | 574 | assert(lsp); |
f390d2c7 | 575 | |
af8ac8f9 | 576 | if (lsp->hdr.rem_lifetime == 0) { |
d62a17ae | 577 | if (lsp->age_out > 0) |
578 | lsp->age_out--; | |
579 | return; | |
580 | } | |
eb5d44eb | 581 | |
af8ac8f9 CF |
582 | lsp->hdr.rem_lifetime--; |
583 | if (lsp->pdu && stream_get_endp(lsp->pdu) >= 12) | |
584 | stream_putw_at(lsp->pdu, 10, lsp->hdr.rem_lifetime); | |
eb5d44eb | 585 | } |
586 | ||
d62a17ae | 587 | static void lspid_print(u_char *lsp_id, u_char *trg, char dynhost, char frag) |
eb5d44eb | 588 | { |
d62a17ae | 589 | struct isis_dynhn *dyn = NULL; |
590 | u_char id[SYSID_STRLEN]; | |
591 | ||
592 | if (dynhost) | |
593 | dyn = dynhn_find_by_id(lsp_id); | |
594 | else | |
595 | dyn = NULL; | |
596 | ||
597 | if (dyn) | |
af8ac8f9 | 598 | sprintf((char *)id, "%.14s", dyn->hostname); |
d62a17ae | 599 | else if (!memcmp(isis->sysid, lsp_id, ISIS_SYS_ID_LEN) && dynhost) |
6b3ee3a0 | 600 | sprintf((char *)id, "%.14s", cmd_hostname_get()); |
d62a17ae | 601 | else |
602 | memcpy(id, sysid_print(lsp_id), 15); | |
603 | if (frag) | |
604 | sprintf((char *)trg, "%s.%02x-%02x", id, LSP_PSEUDO_ID(lsp_id), | |
605 | LSP_FRAGMENT(lsp_id)); | |
606 | else | |
607 | sprintf((char *)trg, "%s.%02x", id, LSP_PSEUDO_ID(lsp_id)); | |
eb5d44eb | 608 | } |
609 | ||
f390d2c7 | 610 | /* Convert the lsp attribute bits to attribute string */ |
af8ac8f9 | 611 | static const char *lsp_bits2string(uint8_t lsp_bits) |
f390d2c7 | 612 | { |
d62a17ae | 613 | char *pos = lsp_bits_string; |
eb5d44eb | 614 | |
af8ac8f9 | 615 | if (!lsp_bits) |
d62a17ae | 616 | return " none"; |
eb5d44eb | 617 | |
d62a17ae | 618 | /* we only focus on the default metric */ |
619 | pos += sprintf(pos, "%d/", | |
af8ac8f9 | 620 | ISIS_MASK_LSP_ATT_DEFAULT_BIT(lsp_bits) ? 1 : 0); |
eb5d44eb | 621 | |
d62a17ae | 622 | pos += sprintf(pos, "%d/", |
af8ac8f9 | 623 | ISIS_MASK_LSP_PARTITION_BIT(lsp_bits) ? 1 : 0); |
f390d2c7 | 624 | |
af8ac8f9 | 625 | pos += sprintf(pos, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits) ? 1 : 0); |
eb5d44eb | 626 | |
d62a17ae | 627 | *(pos) = '\0'; |
eb5d44eb | 628 | |
d62a17ae | 629 | return lsp_bits_string; |
eb5d44eb | 630 | } |
631 | ||
632 | /* this function prints the lsp on show isis database */ | |
d62a17ae | 633 | void lsp_print(struct isis_lsp *lsp, struct vty *vty, char dynhost) |
eb5d44eb | 634 | { |
d62a17ae | 635 | u_char LSPid[255]; |
636 | char age_out[8]; | |
637 | ||
af8ac8f9 | 638 | lspid_print(lsp->hdr.lsp_id, LSPid, dynhost, 1); |
d62a17ae | 639 | vty_out(vty, "%-21s%c ", LSPid, lsp->own_lsp ? '*' : ' '); |
af8ac8f9 CF |
640 | vty_out(vty, "%5" PRIu16 " ", lsp->hdr.pdu_len); |
641 | vty_out(vty, "0x%08" PRIx32 " ", lsp->hdr.seqno); | |
642 | vty_out(vty, "0x%04" PRIx16 " ", lsp->hdr.checksum); | |
643 | if (lsp->hdr.rem_lifetime == 0) { | |
644 | snprintf(age_out, 8, "(%d)", lsp->age_out); | |
d62a17ae | 645 | age_out[7] = '\0'; |
646 | vty_out(vty, "%7s ", age_out); | |
647 | } else | |
af8ac8f9 CF |
648 | vty_out(vty, " %5" PRIu16 " ", lsp->hdr.rem_lifetime); |
649 | vty_out(vty, "%s\n", lsp_bits2string(lsp->hdr.lsp_bits)); | |
c3ae3127 CF |
650 | } |
651 | ||
d62a17ae | 652 | void lsp_print_detail(struct isis_lsp *lsp, struct vty *vty, char dynhost) |
eb5d44eb | 653 | { |
d62a17ae | 654 | lsp_print(lsp, vty, dynhost); |
af8ac8f9 CF |
655 | if (lsp->tlvs) |
656 | vty_multiline(vty, " ", "%s", isis_format_tlvs(lsp->tlvs)); | |
d62a17ae | 657 | vty_out(vty, "\n"); |
eb5d44eb | 658 | } |
659 | ||
660 | /* print all the lsps info in the local lspdb */ | |
d62a17ae | 661 | int lsp_print_all(struct vty *vty, dict_t *lspdb, char detail, char dynhost) |
eb5d44eb | 662 | { |
663 | ||
d62a17ae | 664 | dnode_t *node = dict_first(lspdb), *next; |
665 | int lsp_count = 0; | |
666 | ||
667 | if (detail == ISIS_UI_LEVEL_BRIEF) { | |
668 | while (node != NULL) { | |
669 | /* I think it is unnecessary, so I comment it out */ | |
670 | /* dict_contains (lspdb, node); */ | |
671 | next = dict_next(lspdb, node); | |
672 | lsp_print(dnode_get(node), vty, dynhost); | |
673 | node = next; | |
674 | lsp_count++; | |
675 | } | |
676 | } else if (detail == ISIS_UI_LEVEL_DETAIL) { | |
677 | while (node != NULL) { | |
678 | next = dict_next(lspdb, node); | |
679 | lsp_print_detail(dnode_get(node), vty, dynhost); | |
680 | node = next; | |
681 | lsp_count++; | |
682 | } | |
683 | } | |
684 | ||
685 | return lsp_count; | |
eb5d44eb | 686 | } |
687 | ||
d62a17ae | 688 | static u_int16_t lsp_rem_lifetime(struct isis_area *area, int level) |
3f045a08 | 689 | { |
d62a17ae | 690 | u_int16_t rem_lifetime; |
3f045a08 | 691 | |
d62a17ae | 692 | /* Add jitter to configured LSP lifetime */ |
693 | rem_lifetime = | |
694 | isis_jitter(area->max_lsp_lifetime[level - 1], MAX_AGE_JITTER); | |
3f045a08 | 695 | |
d62a17ae | 696 | /* No jitter if the max refresh will be less than configure gen interval |
697 | */ | |
698 | /* N.B. this calucation is acceptable since rem_lifetime is in | |
699 | * [332,65535] at | |
700 | * this point */ | |
701 | if (area->lsp_gen_interval[level - 1] > (rem_lifetime - 300)) | |
702 | rem_lifetime = area->max_lsp_lifetime[level - 1]; | |
3f045a08 | 703 | |
d62a17ae | 704 | return rem_lifetime; |
3f045a08 JB |
705 | } |
706 | ||
d62a17ae | 707 | static u_int16_t lsp_refresh_time(struct isis_lsp *lsp, u_int16_t rem_lifetime) |
3f045a08 | 708 | { |
d62a17ae | 709 | struct isis_area *area = lsp->area; |
710 | int level = lsp->level; | |
711 | u_int16_t refresh_time; | |
3f045a08 | 712 | |
d62a17ae | 713 | /* Add jitter to LSP refresh time */ |
714 | refresh_time = | |
715 | isis_jitter(area->lsp_refresh[level - 1], MAX_LSP_GEN_JITTER); | |
3f045a08 | 716 | |
d62a17ae | 717 | /* RFC 4444 : make sure the refresh time is at least less than 300 |
718 | * of the remaining lifetime and more than gen interval */ | |
719 | if (refresh_time <= area->lsp_gen_interval[level - 1] | |
720 | || refresh_time > (rem_lifetime - 300)) | |
721 | refresh_time = rem_lifetime - 300; | |
3f045a08 | 722 | |
d62a17ae | 723 | /* In cornercases, refresh_time might be <= lsp_gen_interval, however |
724 | * we accept this violation to satisfy refresh_time <= rem_lifetime - | |
725 | * 300 */ | |
3f045a08 | 726 | |
d62a17ae | 727 | return refresh_time; |
3f045a08 JB |
728 | } |
729 | ||
d62a17ae | 730 | static void lsp_build_ext_reach_ipv4(struct isis_lsp *lsp, |
af8ac8f9 | 731 | struct isis_area *area) |
f3ccedaa | 732 | { |
af8ac8f9 | 733 | struct route_table *er_table = get_ext_reach(area, AF_INET, lsp->level); |
d62a17ae | 734 | if (!er_table) |
735 | return; | |
736 | ||
af8ac8f9 CF |
737 | for (struct route_node *rn = route_top(er_table); rn; |
738 | rn = route_next(rn)) { | |
d62a17ae | 739 | if (!rn->info) |
740 | continue; | |
741 | ||
af8ac8f9 CF |
742 | struct prefix_ipv4 *ipv4 = (struct prefix_ipv4 *)&rn->p; |
743 | struct isis_ext_info *info = rn->info; | |
f3ccedaa | 744 | |
af8ac8f9 CF |
745 | uint32_t metric = info->metric; |
746 | if (metric > MAX_WIDE_PATH_METRIC) | |
747 | metric = MAX_WIDE_PATH_METRIC; | |
748 | if (area->oldmetric && metric > 0x3f) | |
749 | metric = 0x3f; | |
d62a17ae | 750 | |
af8ac8f9 CF |
751 | if (area->oldmetric) |
752 | isis_tlvs_add_oldstyle_ip_reach(lsp->tlvs, ipv4, | |
753 | metric); | |
754 | if (area->newmetric) | |
755 | isis_tlvs_add_extended_ip_reach(lsp->tlvs, ipv4, | |
756 | metric); | |
757 | } | |
c3ae3127 CF |
758 | } |
759 | ||
d62a17ae | 760 | static void lsp_build_ext_reach_ipv6(struct isis_lsp *lsp, |
af8ac8f9 | 761 | struct isis_area *area) |
f3ccedaa | 762 | { |
af8ac8f9 CF |
763 | struct route_table *er_table = |
764 | get_ext_reach(area, AF_INET6, lsp->level); | |
d62a17ae | 765 | if (!er_table) |
766 | return; | |
767 | ||
af8ac8f9 CF |
768 | for (struct route_node *rn = route_top(er_table); rn; |
769 | rn = route_next(rn)) { | |
d62a17ae | 770 | if (!rn->info) |
771 | continue; | |
772 | ||
af8ac8f9 CF |
773 | struct prefix_ipv6 *ipv6 = (struct prefix_ipv6 *)&rn->p; |
774 | struct isis_ext_info *info = rn->info; | |
d62a17ae | 775 | |
af8ac8f9 | 776 | uint32_t metric = info->metric; |
d62a17ae | 777 | if (info->metric > MAX_WIDE_PATH_METRIC) |
af8ac8f9 CF |
778 | metric = MAX_WIDE_PATH_METRIC; |
779 | isis_tlvs_add_ipv6_reach( | |
780 | lsp->tlvs, isis_area_ipv6_topology(area), ipv6, metric); | |
d62a17ae | 781 | } |
f3ccedaa CF |
782 | } |
783 | ||
af8ac8f9 | 784 | static void lsp_build_ext_reach(struct isis_lsp *lsp, struct isis_area *area) |
f3ccedaa | 785 | { |
af8ac8f9 CF |
786 | lsp_build_ext_reach_ipv4(lsp, area); |
787 | lsp_build_ext_reach_ipv6(lsp, area); | |
788 | } | |
789 | ||
790 | static struct isis_lsp *lsp_next_frag(uint8_t frag_num, struct isis_lsp *lsp0, | |
791 | struct isis_area *area, int level) | |
792 | { | |
793 | struct isis_lsp *lsp; | |
794 | uint8_t frag_id[ISIS_SYS_ID_LEN + 2]; | |
795 | ||
796 | memcpy(frag_id, lsp0->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); | |
797 | LSP_FRAGMENT(frag_id) = frag_num; | |
798 | ||
799 | lsp = lsp_search(frag_id, area->lspdb[level - 1]); | |
800 | if (lsp) { | |
801 | lsp_clear_data(lsp); | |
0b8b6cab CF |
802 | if (!lsp->lspu.zero_lsp) |
803 | lsp_link_fragment(lsp, lsp0); | |
af8ac8f9 CF |
804 | return lsp; |
805 | } | |
806 | ||
807 | lsp = lsp_new(area, frag_id, lsp0->hdr.rem_lifetime, 0, | |
808 | lsp_bits_generate(level, area->overload_bit, | |
809 | area->attached_bit), | |
8f5dbe18 | 810 | 0, lsp0, level); |
af8ac8f9 CF |
811 | lsp->own_lsp = 1; |
812 | lsp_insert(lsp, area->lspdb[level - 1]); | |
af8ac8f9 | 813 | return lsp; |
f3ccedaa CF |
814 | } |
815 | ||
eb5d44eb | 816 | /* |
d62a17ae | 817 | * Builds the LSP data part. This func creates a new frag whenever |
eb5d44eb | 818 | * area->lsp_frag_threshold is exceeded. |
819 | */ | |
d62a17ae | 820 | static void lsp_build(struct isis_lsp *lsp, struct isis_area *area) |
eb5d44eb | 821 | { |
d62a17ae | 822 | int level = lsp->level; |
af8ac8f9 CF |
823 | char buf[PREFIX2STR_BUFFER]; |
824 | struct listnode *node; | |
825 | struct isis_lsp *frag; | |
826 | ||
827 | lsp_clear_data(lsp); | |
828 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) | |
829 | lsp_clear_data(frag); | |
d62a17ae | 830 | |
af8ac8f9 | 831 | lsp->tlvs = isis_alloc_tlvs(); |
d62a17ae | 832 | lsp_debug("ISIS (%s): Constructing local system LSP for level %d", |
833 | area->area_tag, level); | |
834 | ||
af8ac8f9 CF |
835 | lsp->hdr.lsp_bits = lsp_bits_generate(level, area->overload_bit, |
836 | area->attached_bit); | |
d62a17ae | 837 | |
af8ac8f9 | 838 | lsp_add_auth(lsp); |
d62a17ae | 839 | |
af8ac8f9 | 840 | isis_tlvs_add_area_addresses(lsp->tlvs, area->area_addrs); |
d62a17ae | 841 | |
842 | /* Protocols Supported */ | |
843 | if (area->ip_circuits > 0 || area->ipv6_circuits > 0) { | |
af8ac8f9 | 844 | struct nlpids nlpids = {.count = 0}; |
d62a17ae | 845 | if (area->ip_circuits > 0) { |
846 | lsp_debug( | |
847 | "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs", | |
848 | area->area_tag); | |
af8ac8f9 CF |
849 | nlpids.nlpids[nlpids.count] = NLPID_IP; |
850 | nlpids.count++; | |
d62a17ae | 851 | } |
852 | if (area->ipv6_circuits > 0) { | |
853 | lsp_debug( | |
854 | "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs", | |
855 | area->area_tag); | |
af8ac8f9 CF |
856 | nlpids.nlpids[nlpids.count] = NLPID_IPV6; |
857 | nlpids.count++; | |
d62a17ae | 858 | } |
af8ac8f9 | 859 | isis_tlvs_set_protocols_supported(lsp->tlvs, &nlpids); |
d62a17ae | 860 | } |
861 | ||
862 | if (area_is_mt(area)) { | |
863 | lsp_debug("ISIS (%s): Adding MT router tlv...", area->area_tag); | |
d62a17ae | 864 | |
865 | struct isis_area_mt_setting **mt_settings; | |
866 | unsigned int mt_count; | |
867 | ||
868 | mt_settings = area_mt_settings(area, &mt_count); | |
869 | for (unsigned int i = 0; i < mt_count; i++) { | |
af8ac8f9 CF |
870 | isis_tlvs_add_mt_router_info( |
871 | lsp->tlvs, mt_settings[i]->mtid, | |
872 | mt_settings[i]->overload, false); | |
d62a17ae | 873 | lsp_debug("ISIS (%s): MT %s", area->area_tag, |
af8ac8f9 | 874 | isis_mtid2str(mt_settings[i]->mtid)); |
aa4376ec | 875 | } |
d62a17ae | 876 | } else { |
877 | lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)", | |
878 | area->area_tag); | |
879 | } | |
880 | /* Dynamic Hostname */ | |
881 | if (area->dynhostname) { | |
6b3ee3a0 | 882 | isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get()); |
af8ac8f9 | 883 | lsp_debug("ISIS (%s): Adding dynamic hostname '%s'", |
6b3ee3a0 | 884 | area->area_tag, cmd_hostname_get()); |
d62a17ae | 885 | } else { |
886 | lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)", | |
887 | area->area_tag); | |
888 | } | |
889 | ||
890 | /* IPv4 address and TE router ID TLVs. In case of the first one we don't | |
891 | * follow "C" vendor, but "J" vendor behavior - one IPv4 address is put | |
892 | * into | |
893 | * LSP and this address is same as router id. */ | |
894 | if (isis->router_id != 0) { | |
af8ac8f9 CF |
895 | struct in_addr id = {.s_addr = isis->router_id}; |
896 | inet_ntop(AF_INET, &id, buf, sizeof(buf)); | |
d62a17ae | 897 | lsp_debug("ISIS (%s): Adding router ID %s as IPv4 tlv.", |
898 | area->area_tag, buf); | |
af8ac8f9 | 899 | isis_tlvs_add_ipv4_address(lsp->tlvs, &id); |
d62a17ae | 900 | |
901 | /* Exactly same data is put into TE router ID TLV, but only if | |
902 | * new style | |
903 | * TLV's are in use. */ | |
904 | if (area->newmetric) { | |
af8ac8f9 | 905 | |
d62a17ae | 906 | lsp_debug( |
907 | "ISIS (%s): Adding router ID also as TE router ID tlv.", | |
908 | area->area_tag); | |
af8ac8f9 | 909 | isis_tlvs_set_te_router_id(lsp->tlvs, &id); |
aa4376ec | 910 | } |
d62a17ae | 911 | } else { |
912 | lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.", | |
913 | area->area_tag); | |
914 | } | |
915 | ||
d62a17ae | 916 | lsp_debug("ISIS (%s): Adding circuit specific information.", |
917 | area->area_tag); | |
918 | ||
af8ac8f9 | 919 | struct isis_circuit *circuit; |
d62a17ae | 920 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit)) { |
921 | if (!circuit->interface) | |
922 | lsp_debug( | |
923 | "ISIS (%s): Processing %s circuit %p with unknown interface", | |
924 | area->area_tag, | |
925 | circuit_type2string(circuit->circ_type), | |
926 | circuit); | |
927 | else | |
928 | lsp_debug("ISIS (%s): Processing %s circuit %s", | |
929 | area->area_tag, | |
930 | circuit_type2string(circuit->circ_type), | |
931 | circuit->interface->name); | |
932 | ||
933 | if (circuit->state != C_STATE_UP) { | |
934 | lsp_debug("ISIS (%s): Circuit is not up, ignoring.", | |
935 | area->area_tag); | |
936 | continue; | |
aa4376ec | 937 | } |
d62a17ae | 938 | |
af8ac8f9 CF |
939 | uint32_t metric = area->oldmetric |
940 | ? circuit->metric[level - 1] | |
941 | : circuit->te_metric[level - 1]; | |
942 | ||
d62a17ae | 943 | if (circuit->ip_router && circuit->ip_addrs |
944 | && circuit->ip_addrs->count > 0) { | |
945 | lsp_debug( | |
946 | "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.", | |
947 | area->area_tag); | |
af8ac8f9 CF |
948 | struct listnode *ipnode; |
949 | struct prefix_ipv4 *ipv4; | |
950 | for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, ipnode, | |
951 | ipv4)) { | |
952 | if (area->oldmetric) { | |
d62a17ae | 953 | lsp_debug( |
af8ac8f9 CF |
954 | "ISIS (%s): Adding old-style IP reachability for %s", |
955 | area->area_tag, | |
956 | prefix2str(ipv4, buf, | |
957 | sizeof(buf))); | |
958 | isis_tlvs_add_oldstyle_ip_reach( | |
959 | lsp->tlvs, ipv4, metric); | |
d62a17ae | 960 | } |
af8ac8f9 CF |
961 | |
962 | if (area->newmetric) { | |
d62a17ae | 963 | lsp_debug( |
af8ac8f9 CF |
964 | "ISIS (%s): Adding te-style IP reachability for %s", |
965 | area->area_tag, | |
966 | prefix2str(ipv4, buf, | |
967 | sizeof(buf))); | |
968 | isis_tlvs_add_extended_ip_reach( | |
969 | lsp->tlvs, ipv4, metric); | |
d62a17ae | 970 | } |
971 | } | |
f390d2c7 | 972 | } |
d62a17ae | 973 | |
d62a17ae | 974 | if (circuit->ipv6_router && circuit->ipv6_non_link |
975 | && circuit->ipv6_non_link->count > 0) { | |
af8ac8f9 CF |
976 | struct listnode *ipnode; |
977 | struct prefix_ipv6 *ipv6; | |
d62a17ae | 978 | for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, |
979 | ipnode, ipv6)) { | |
d62a17ae | 980 | lsp_debug( |
af8ac8f9 CF |
981 | "ISIS (%s): Adding IPv6 reachability for %s", |
982 | area->area_tag, | |
983 | prefix2str(ipv6, buf, sizeof(buf))); | |
984 | isis_tlvs_add_ipv6_reach( | |
985 | lsp->tlvs, | |
986 | isis_area_ipv6_topology(area), ipv6, | |
987 | metric); | |
d62a17ae | 988 | } |
aa4376ec | 989 | } |
d62a17ae | 990 | |
991 | switch (circuit->circ_type) { | |
992 | case CIRCUIT_T_BROADCAST: | |
993 | if (level & circuit->is_type) { | |
af8ac8f9 CF |
994 | uint8_t *ne_id = |
995 | (level == IS_LEVEL_1) | |
996 | ? circuit->u.bc.l1_desig_is | |
997 | : circuit->u.bc.l2_desig_is; | |
998 | ||
999 | if (LSP_PSEUDO_ID(ne_id)) { | |
1000 | if (area->oldmetric) { | |
d62a17ae | 1001 | lsp_debug( |
1002 | "ISIS (%s): Adding DIS %s.%02x as old-style neighbor", | |
1003 | area->area_tag, | |
af8ac8f9 CF |
1004 | sysid_print(ne_id), |
1005 | LSP_PSEUDO_ID(ne_id)); | |
1006 | isis_tlvs_add_oldstyle_reach( | |
1007 | lsp->tlvs, ne_id, | |
1008 | metric); | |
d62a17ae | 1009 | } |
af8ac8f9 CF |
1010 | if (area->newmetric) { |
1011 | uint8_t subtlvs[256]; | |
1012 | uint8_t subtlv_len; | |
1013 | ||
d62a17ae | 1014 | if (IS_MPLS_TE(isisMplsTE) |
1015 | && HAS_LINK_PARAMS( | |
1016 | circuit->interface)) | |
af8ac8f9 CF |
1017 | subtlv_len = add_te_subtlvs( |
1018 | subtlvs, | |
d62a17ae | 1019 | circuit->mtc); |
1020 | else | |
af8ac8f9 | 1021 | subtlv_len = 0; |
d62a17ae | 1022 | |
1023 | tlvs_add_mt_bcast( | |
af8ac8f9 CF |
1024 | lsp->tlvs, circuit, |
1025 | level, ne_id, metric, | |
1026 | subtlvs, subtlv_len); | |
d62a17ae | 1027 | } |
1028 | } | |
1029 | } else { | |
1030 | lsp_debug( | |
1031 | "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors", | |
1032 | area->area_tag); | |
1033 | } | |
1034 | break; | |
af8ac8f9 CF |
1035 | case CIRCUIT_T_P2P: { |
1036 | struct isis_adjacency *nei = circuit->u.p2p.neighbor; | |
d62a17ae | 1037 | if (nei && (level & nei->circuit_t)) { |
af8ac8f9 CF |
1038 | uint8_t ne_id[7]; |
1039 | memcpy(ne_id, nei->sysid, ISIS_SYS_ID_LEN); | |
1040 | LSP_PSEUDO_ID(ne_id) = 0; | |
1041 | ||
d62a17ae | 1042 | if (area->oldmetric) { |
d62a17ae | 1043 | lsp_debug( |
1044 | "ISIS (%s): Adding old-style is reach for %s", | |
1045 | area->area_tag, | |
af8ac8f9 CF |
1046 | sysid_print(ne_id)); |
1047 | isis_tlvs_add_oldstyle_reach( | |
1048 | lsp->tlvs, ne_id, metric); | |
d62a17ae | 1049 | } |
1050 | if (area->newmetric) { | |
af8ac8f9 CF |
1051 | uint8_t subtlvs[256]; |
1052 | uint8_t subtlv_len; | |
d62a17ae | 1053 | |
d62a17ae | 1054 | if (IS_MPLS_TE(isisMplsTE) |
1055 | && HAS_LINK_PARAMS( | |
1056 | circuit->interface)) | |
1057 | /* Update Local and Remote IP | |
1058 | * address for MPLS TE circuit | |
1059 | * parameters */ | |
1060 | /* NOTE sure that it is the | |
1061 | * pertinent place for that | |
1062 | * updates */ | |
1063 | /* Local IP address could be | |
1064 | * updated in isis_circuit.c - | |
1065 | * isis_circuit_add_addr() */ | |
1066 | /* But, where update remote IP | |
1067 | * address ? in isis_pdu.c - | |
1068 | * process_p2p_hello() ? */ | |
1069 | ||
1070 | /* Add SubTLVs & Adjust real | |
1071 | * size of SubTLVs */ | |
af8ac8f9 CF |
1072 | subtlv_len = add_te_subtlvs( |
1073 | subtlvs, circuit->mtc); | |
d62a17ae | 1074 | else |
1075 | /* Or keep only TE metric with | |
1076 | * no SubTLVs if MPLS_TE is off | |
1077 | */ | |
af8ac8f9 | 1078 | subtlv_len = 0; |
d62a17ae | 1079 | |
af8ac8f9 CF |
1080 | tlvs_add_mt_p2p(lsp->tlvs, circuit, |
1081 | ne_id, metric, subtlvs, | |
1082 | subtlv_len); | |
d62a17ae | 1083 | } |
1084 | } else { | |
1085 | lsp_debug( | |
1086 | "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors", | |
1087 | area->area_tag); | |
1088 | } | |
af8ac8f9 | 1089 | } break; |
d62a17ae | 1090 | case CIRCUIT_T_LOOPBACK: |
1091 | break; | |
1092 | default: | |
1093 | zlog_warn("lsp_area_create: unknown circuit type"); | |
aa4376ec | 1094 | } |
d62a17ae | 1095 | } |
1096 | ||
af8ac8f9 | 1097 | lsp_build_ext_reach(lsp, area); |
d62a17ae | 1098 | |
af8ac8f9 CF |
1099 | struct isis_tlvs *tlvs = lsp->tlvs; |
1100 | lsp->tlvs = NULL; | |
d62a17ae | 1101 | |
af8ac8f9 CF |
1102 | lsp_pack_pdu(lsp); |
1103 | size_t tlv_space = STREAM_WRITEABLE(lsp->pdu) - LLC_LEN; | |
1104 | lsp_clear_data(lsp); | |
d62a17ae | 1105 | |
af8ac8f9 CF |
1106 | struct list *fragments = isis_fragment_tlvs(tlvs, tlv_space); |
1107 | if (!fragments) { | |
1108 | zlog_warn("BUG: could not fragment own LSP:"); | |
1109 | log_multiline(LOG_WARNING, " ", "%s", isis_format_tlvs(tlvs)); | |
1110 | isis_free_tlvs(tlvs); | |
1111 | return; | |
d62a17ae | 1112 | } |
af8ac8f9 | 1113 | isis_free_tlvs(tlvs); |
d62a17ae | 1114 | |
789c4dfc | 1115 | bool fragment_overflow = false; |
af8ac8f9 CF |
1116 | frag = lsp; |
1117 | for (ALL_LIST_ELEMENTS_RO(fragments, node, tlvs)) { | |
1118 | if (node != listhead(fragments)) { | |
789c4dfc CF |
1119 | if (LSP_FRAGMENT(frag->hdr.lsp_id) == 255) { |
1120 | if (!fragment_overflow) { | |
1121 | fragment_overflow = true; | |
1122 | zlog_warn("ISIS (%s): Too much information for 256 fragments", | |
1123 | area->area_tag); | |
1124 | } | |
1125 | isis_free_tlvs(tlvs); | |
1126 | continue; | |
1127 | } | |
1128 | ||
af8ac8f9 CF |
1129 | frag = lsp_next_frag(LSP_FRAGMENT(frag->hdr.lsp_id) + 1, |
1130 | lsp, area, level); | |
d62a17ae | 1131 | } |
af8ac8f9 | 1132 | frag->tlvs = tlvs; |
d62a17ae | 1133 | } |
1134 | ||
affe9e99 | 1135 | list_delete_and_null(&fragments); |
af8ac8f9 CF |
1136 | lsp_debug("ISIS (%s): LSP construction is complete. Serializing...", |
1137 | area->area_tag); | |
d62a17ae | 1138 | return; |
eb5d44eb | 1139 | } |
eb5d44eb | 1140 | |
1141 | /* | |
3f045a08 | 1142 | * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs |
eb5d44eb | 1143 | */ |
d62a17ae | 1144 | int lsp_generate(struct isis_area *area, int level) |
f390d2c7 | 1145 | { |
d62a17ae | 1146 | struct isis_lsp *oldlsp, *newlsp; |
1147 | u_int32_t seq_num = 0; | |
1148 | u_char lspid[ISIS_SYS_ID_LEN + 2]; | |
1149 | u_int16_t rem_lifetime, refresh_time; | |
1150 | ||
1151 | if ((area == NULL) || (area->is_type & level) != level) | |
1152 | return ISIS_ERROR; | |
1153 | ||
1154 | memset(&lspid, 0, ISIS_SYS_ID_LEN + 2); | |
1155 | memcpy(&lspid, isis->sysid, ISIS_SYS_ID_LEN); | |
1156 | ||
1157 | /* only builds the lsp if the area shares the level */ | |
1158 | oldlsp = lsp_search(lspid, area->lspdb[level - 1]); | |
1159 | if (oldlsp) { | |
1160 | /* FIXME: we should actually initiate a purge */ | |
af8ac8f9 CF |
1161 | seq_num = oldlsp->hdr.seqno; |
1162 | lsp_search_and_destroy(oldlsp->hdr.lsp_id, | |
d62a17ae | 1163 | area->lspdb[level - 1]); |
1164 | } | |
1165 | rem_lifetime = lsp_rem_lifetime(area, level); | |
1166 | newlsp = | |
1167 | lsp_new(area, lspid, rem_lifetime, seq_num, | |
1168 | area->is_type | area->overload_bit | area->attached_bit, | |
8f5dbe18 | 1169 | 0, NULL, level); |
d62a17ae | 1170 | newlsp->area = area; |
1171 | newlsp->own_lsp = 1; | |
1172 | ||
1173 | lsp_insert(newlsp, area->lspdb[level - 1]); | |
1174 | /* build_lsp_data (newlsp, area); */ | |
1175 | lsp_build(newlsp, area); | |
1176 | /* time to calculate our checksum */ | |
af8ac8f9 | 1177 | lsp_seqno_update(newlsp); |
d62a17ae | 1178 | newlsp->last_generated = time(NULL); |
1179 | lsp_set_all_srmflags(newlsp); | |
1180 | ||
1181 | refresh_time = lsp_refresh_time(newlsp, rem_lifetime); | |
1182 | ||
1183 | THREAD_TIMER_OFF(area->t_lsp_refresh[level - 1]); | |
1184 | area->lsp_regenerate_pending[level - 1] = 0; | |
1185 | if (level == IS_LEVEL_1) | |
1186 | thread_add_timer(master, lsp_l1_refresh, area, refresh_time, | |
1187 | &area->t_lsp_refresh[level - 1]); | |
1188 | else if (level == IS_LEVEL_2) | |
1189 | thread_add_timer(master, lsp_l2_refresh, area, refresh_time, | |
1190 | &area->t_lsp_refresh[level - 1]); | |
1191 | ||
1192 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
af8ac8f9 CF |
1193 | zlog_debug("ISIS-Upd (%s): Building L%d LSP %s, len %" PRIu16 |
1194 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1195 | ", lifetime %" PRIu16 "s refresh %" PRIu16 "s", | |
1196 | area->area_tag, level, | |
1197 | rawlspid_print(newlsp->hdr.lsp_id), | |
1198 | newlsp->hdr.pdu_len, newlsp->hdr.seqno, | |
1199 | newlsp->hdr.checksum, newlsp->hdr.rem_lifetime, | |
1200 | refresh_time); | |
d62a17ae | 1201 | } |
1202 | sched_debug( | |
1203 | "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.", | |
1204 | area->area_tag, level); | |
1205 | ||
1206 | return ISIS_OK; | |
eb5d44eb | 1207 | } |
1208 | ||
1209 | /* | |
3f045a08 | 1210 | * Search own LSPs, update holding time and set SRM |
eb5d44eb | 1211 | */ |
d62a17ae | 1212 | static int lsp_regenerate(struct isis_area *area, int level) |
eb5d44eb | 1213 | { |
d62a17ae | 1214 | dict_t *lspdb; |
1215 | struct isis_lsp *lsp, *frag; | |
1216 | struct listnode *node; | |
1217 | u_char lspid[ISIS_SYS_ID_LEN + 2]; | |
1218 | u_int16_t rem_lifetime, refresh_time; | |
1219 | ||
1220 | if ((area == NULL) || (area->is_type & level) != level) | |
1221 | return ISIS_ERROR; | |
1222 | ||
1223 | lspdb = area->lspdb[level - 1]; | |
1224 | ||
1225 | memset(lspid, 0, ISIS_SYS_ID_LEN + 2); | |
1226 | memcpy(lspid, isis->sysid, ISIS_SYS_ID_LEN); | |
1227 | ||
1228 | lsp = lsp_search(lspid, lspdb); | |
1229 | ||
1230 | if (!lsp) { | |
1231 | zlog_err("ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!", | |
1232 | area->area_tag, level); | |
1233 | return ISIS_ERROR; | |
1234 | } | |
1235 | ||
1236 | lsp_clear_data(lsp); | |
1237 | lsp_build(lsp, area); | |
d62a17ae | 1238 | rem_lifetime = lsp_rem_lifetime(area, level); |
af8ac8f9 | 1239 | lsp->hdr.rem_lifetime = rem_lifetime; |
d62a17ae | 1240 | lsp->last_generated = time(NULL); |
1241 | lsp_set_all_srmflags(lsp); | |
1242 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { | |
af8ac8f9 | 1243 | frag->hdr.lsp_bits = lsp_bits_generate( |
d62a17ae | 1244 | level, area->overload_bit, area->attached_bit); |
1245 | /* Set the lifetime values of all the fragments to the same | |
1246 | * value, | |
1247 | * so that no fragment expires before the lsp is refreshed. | |
1248 | */ | |
af8ac8f9 | 1249 | frag->hdr.rem_lifetime = rem_lifetime; |
0b8b6cab | 1250 | frag->age_out = ZERO_AGE_LIFETIME; |
d62a17ae | 1251 | lsp_set_all_srmflags(frag); |
1252 | } | |
af8ac8f9 | 1253 | lsp_seqno_update(lsp); |
d62a17ae | 1254 | |
1255 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1256 | if (level == IS_LEVEL_1) | |
1257 | thread_add_timer(master, lsp_l1_refresh, area, refresh_time, | |
1258 | &area->t_lsp_refresh[level - 1]); | |
1259 | else if (level == IS_LEVEL_2) | |
1260 | thread_add_timer(master, lsp_l2_refresh, area, refresh_time, | |
1261 | &area->t_lsp_refresh[level - 1]); | |
1262 | area->lsp_regenerate_pending[level - 1] = 0; | |
1263 | ||
1264 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1265 | zlog_debug( | |
af8ac8f9 CF |
1266 | "ISIS-Upd (%s): Refreshed our L%d LSP %s, len %" PRIu16 |
1267 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1268 | ", lifetime %" PRIu16 "s refresh %" PRIu16 "s", | |
1269 | area->area_tag, level, rawlspid_print(lsp->hdr.lsp_id), | |
1270 | lsp->hdr.pdu_len, lsp->hdr.seqno, lsp->hdr.checksum, | |
1271 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1272 | } |
1273 | sched_debug( | |
1274 | "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.", | |
1275 | area->area_tag, level); | |
1276 | ||
1277 | return ISIS_OK; | |
eb5d44eb | 1278 | } |
1279 | ||
eb5d44eb | 1280 | /* |
3f045a08 | 1281 | * Something has changed or periodic refresh -> regenerate LSP |
eb5d44eb | 1282 | */ |
d62a17ae | 1283 | static int lsp_l1_refresh(struct thread *thread) |
eb5d44eb | 1284 | { |
d62a17ae | 1285 | struct isis_area *area; |
eb5d44eb | 1286 | |
d62a17ae | 1287 | area = THREAD_ARG(thread); |
1288 | assert(area); | |
f390d2c7 | 1289 | |
d62a17ae | 1290 | area->t_lsp_refresh[0] = NULL; |
1291 | area->lsp_regenerate_pending[0] = 0; | |
eb5d44eb | 1292 | |
d62a17ae | 1293 | if ((area->is_type & IS_LEVEL_1) == 0) |
1294 | return ISIS_ERROR; | |
d70f99e1 | 1295 | |
d62a17ae | 1296 | sched_debug( |
1297 | "ISIS (%s): LSP L1 refresh timer expired. Refreshing LSP...", | |
1298 | area->area_tag); | |
1299 | return lsp_regenerate(area, IS_LEVEL_1); | |
eb5d44eb | 1300 | } |
1301 | ||
d62a17ae | 1302 | static int lsp_l2_refresh(struct thread *thread) |
eb5d44eb | 1303 | { |
d62a17ae | 1304 | struct isis_area *area; |
eb5d44eb | 1305 | |
d62a17ae | 1306 | area = THREAD_ARG(thread); |
1307 | assert(area); | |
f390d2c7 | 1308 | |
d62a17ae | 1309 | area->t_lsp_refresh[1] = NULL; |
1310 | area->lsp_regenerate_pending[1] = 0; | |
f390d2c7 | 1311 | |
d62a17ae | 1312 | if ((area->is_type & IS_LEVEL_2) == 0) |
1313 | return ISIS_ERROR; | |
3f045a08 | 1314 | |
d62a17ae | 1315 | sched_debug( |
1316 | "ISIS (%s): LSP L2 refresh timer expired. Refreshing LSP...", | |
1317 | area->area_tag); | |
1318 | return lsp_regenerate(area, IS_LEVEL_2); | |
eb5d44eb | 1319 | } |
1320 | ||
d62a17ae | 1321 | int lsp_regenerate_schedule(struct isis_area *area, int level, int all_pseudo) |
eb5d44eb | 1322 | { |
d62a17ae | 1323 | struct isis_lsp *lsp; |
1324 | u_char id[ISIS_SYS_ID_LEN + 2]; | |
1325 | time_t now, diff; | |
1326 | long timeout; | |
1327 | struct listnode *cnode; | |
1328 | struct isis_circuit *circuit; | |
1329 | int lvl; | |
1330 | ||
1331 | if (area == NULL) | |
1332 | return ISIS_ERROR; | |
1333 | ||
1334 | sched_debug( | |
1335 | "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs", | |
1336 | area->area_tag, circuit_t2string(level), | |
1337 | all_pseudo ? "" : "not "); | |
1338 | ||
1339 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1340 | LSP_PSEUDO_ID(id) = LSP_FRAGMENT(id) = 0; | |
1341 | now = time(NULL); | |
1342 | ||
1343 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1344 | if (!((level & lvl) && (area->is_type & lvl))) | |
1345 | continue; | |
1346 | ||
1347 | sched_debug( | |
1348 | "ISIS (%s): Checking whether L%d needs to be scheduled", | |
1349 | area->area_tag, lvl); | |
1350 | ||
1351 | if (area->lsp_regenerate_pending[lvl - 1]) { | |
1352 | struct timeval remain = thread_timer_remain( | |
1353 | area->t_lsp_refresh[lvl - 1]); | |
1354 | sched_debug( | |
1355 | "ISIS (%s): Regeneration is already pending, nothing todo." | |
1356 | " (Due in %lld.%03lld seconds)", | |
1357 | area->area_tag, (long long)remain.tv_sec, | |
1358 | (long long)remain.tv_usec / 1000); | |
1359 | continue; | |
1360 | } | |
1361 | ||
1362 | lsp = lsp_search(id, area->lspdb[lvl - 1]); | |
1363 | if (!lsp) { | |
1364 | sched_debug( | |
1365 | "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.", | |
1366 | area->area_tag); | |
1367 | continue; | |
1368 | } | |
1369 | ||
1370 | /* | |
1371 | * Throttle avoidance | |
1372 | */ | |
1373 | sched_debug( | |
1374 | "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld", | |
1375 | area->area_tag, (long long)lsp->last_generated, | |
1376 | (long long)now); | |
1377 | THREAD_TIMER_OFF(area->t_lsp_refresh[lvl - 1]); | |
1378 | diff = now - lsp->last_generated; | |
1379 | if (diff < area->lsp_gen_interval[lvl - 1]) { | |
1380 | timeout = | |
1381 | 1000 * (area->lsp_gen_interval[lvl - 1] - diff); | |
1382 | sched_debug( | |
1383 | "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval", | |
1384 | area->area_tag, timeout); | |
1385 | } else { | |
1386 | /* | |
1387 | * lsps are not regenerated if lsp_regenerate function | |
1388 | * is called | |
1389 | * directly. However if the lsp_regenerate call is | |
1390 | * queued for | |
1391 | * later execution it works. | |
1392 | */ | |
1393 | timeout = 100; | |
1394 | sched_debug( | |
1395 | "ISIS (%s): Last generation was more than lsp_gen_interval ago." | |
1396 | " Scheduling for execution in %ld ms.", | |
1397 | area->area_tag, timeout); | |
1398 | } | |
1399 | ||
1400 | area->lsp_regenerate_pending[lvl - 1] = 1; | |
1401 | if (lvl == IS_LEVEL_1) { | |
1402 | thread_add_timer_msec(master, lsp_l1_refresh, area, | |
1403 | timeout, | |
1404 | &area->t_lsp_refresh[lvl - 1]); | |
1405 | } else if (lvl == IS_LEVEL_2) { | |
1406 | thread_add_timer_msec(master, lsp_l2_refresh, area, | |
1407 | timeout, | |
1408 | &area->t_lsp_refresh[lvl - 1]); | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | if (all_pseudo) { | |
1413 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, cnode, circuit)) | |
1414 | lsp_regenerate_schedule_pseudo(circuit, level); | |
1415 | } | |
1416 | ||
1417 | return ISIS_OK; | |
eb5d44eb | 1418 | } |
1419 | ||
1420 | /* | |
1421 | * Funcs for pseudonode LSPs | |
1422 | */ | |
1423 | ||
1424 | /* | |
d62a17ae | 1425 | * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs |
eb5d44eb | 1426 | */ |
d62a17ae | 1427 | static void lsp_build_pseudo(struct isis_lsp *lsp, struct isis_circuit *circuit, |
1428 | int level) | |
eb5d44eb | 1429 | { |
d62a17ae | 1430 | struct isis_adjacency *adj; |
d62a17ae | 1431 | struct list *adj_list; |
1432 | struct listnode *node; | |
1433 | struct isis_area *area = circuit->area; | |
1434 | ||
af8ac8f9 CF |
1435 | lsp_clear_data(lsp); |
1436 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 1437 | lsp_debug( |
1438 | "ISIS (%s): Constructing pseudo LSP %s for interface %s level %d", | |
af8ac8f9 | 1439 | area->area_tag, rawlspid_print(lsp->hdr.lsp_id), |
d62a17ae | 1440 | circuit->interface->name, level); |
1441 | ||
1442 | lsp->level = level; | |
1443 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
af8ac8f9 | 1444 | lsp->hdr.lsp_bits = |
d62a17ae | 1445 | lsp_bits_generate(level, 0, circuit->area->attached_bit); |
1446 | ||
1447 | /* | |
1448 | * add self to IS neighbours | |
1449 | */ | |
af8ac8f9 CF |
1450 | uint8_t ne_id[ISIS_SYS_ID_LEN + 1]; |
1451 | ||
1452 | memcpy(ne_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1453 | LSP_PSEUDO_ID(ne_id) = 0; | |
d62a17ae | 1454 | |
af8ac8f9 CF |
1455 | if (circuit->area->oldmetric) { |
1456 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
d62a17ae | 1457 | lsp_debug( |
1458 | "ISIS (%s): Adding %s.%02x as old-style neighbor (self)", | |
af8ac8f9 CF |
1459 | area->area_tag, sysid_print(ne_id), |
1460 | LSP_PSEUDO_ID(ne_id)); | |
d62a17ae | 1461 | } |
1462 | if (circuit->area->newmetric) { | |
af8ac8f9 CF |
1463 | isis_tlvs_add_extended_reach(lsp->tlvs, ISIS_MT_IPV4_UNICAST, |
1464 | ne_id, 0, NULL, 0); | |
d62a17ae | 1465 | lsp_debug( |
1466 | "ISIS (%s): Adding %s.%02x as te-style neighbor (self)", | |
af8ac8f9 CF |
1467 | area->area_tag, sysid_print(ne_id), |
1468 | LSP_PSEUDO_ID(ne_id)); | |
d62a17ae | 1469 | } |
1470 | ||
1471 | adj_list = list_new(); | |
1472 | isis_adj_build_up_list(circuit->u.bc.adjdb[level - 1], adj_list); | |
1473 | ||
1474 | for (ALL_LIST_ELEMENTS_RO(adj_list, node, adj)) { | |
af8ac8f9 | 1475 | if (!(adj->level & level)) { |
d62a17ae | 1476 | lsp_debug( |
1477 | "ISIS (%s): Ignoring neighbor %s, level does not intersect", | |
1478 | area->area_tag, sysid_print(adj->sysid)); | |
af8ac8f9 | 1479 | continue; |
f390d2c7 | 1480 | } |
d62a17ae | 1481 | |
af8ac8f9 CF |
1482 | if (!(level == IS_LEVEL_1 |
1483 | && adj->sys_type == ISIS_SYSTYPE_L1_IS) | |
1484 | && !(level == IS_LEVEL_1 | |
1485 | && adj->sys_type == ISIS_SYSTYPE_L2_IS | |
1486 | && adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
1487 | && !(level == IS_LEVEL_2 | |
1488 | && adj->sys_type == ISIS_SYSTYPE_L2_IS)) { | |
1489 | lsp_debug( | |
1490 | "ISIS (%s): Ignoring neighbor %s, level does not match", | |
1491 | area->area_tag, sysid_print(adj->sysid)); | |
1492 | continue; | |
1493 | } | |
d62a17ae | 1494 | |
af8ac8f9 CF |
1495 | memcpy(ne_id, adj->sysid, ISIS_SYS_ID_LEN); |
1496 | if (circuit->area->oldmetric) { | |
1497 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
1498 | lsp_debug( | |
1499 | "ISIS (%s): Adding %s.%02x as old-style neighbor (peer)", | |
1500 | area->area_tag, sysid_print(ne_id), | |
1501 | LSP_PSEUDO_ID(ne_id)); | |
1502 | } | |
1503 | if (circuit->area->newmetric) { | |
1504 | isis_tlvs_add_extended_reach(lsp->tlvs, | |
1505 | ISIS_MT_IPV4_UNICAST, | |
1506 | ne_id, 0, NULL, 0); | |
1507 | lsp_debug( | |
1508 | "ISIS (%s): Adding %s.%02x as te-style neighbor (peer)", | |
1509 | area->area_tag, sysid_print(ne_id), | |
1510 | LSP_PSEUDO_ID(ne_id)); | |
1511 | } | |
1512 | } | |
affe9e99 | 1513 | list_delete_and_null(&adj_list); |
d62a17ae | 1514 | return; |
eb5d44eb | 1515 | } |
1516 | ||
d62a17ae | 1517 | int lsp_generate_pseudo(struct isis_circuit *circuit, int level) |
3f045a08 | 1518 | { |
d62a17ae | 1519 | dict_t *lspdb = circuit->area->lspdb[level - 1]; |
1520 | struct isis_lsp *lsp; | |
1521 | u_char lsp_id[ISIS_SYS_ID_LEN + 2]; | |
1522 | u_int16_t rem_lifetime, refresh_time; | |
1523 | ||
1524 | if ((circuit->is_type & level) != level | |
1525 | || (circuit->state != C_STATE_UP) | |
1526 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1527 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1528 | return ISIS_ERROR; | |
1529 | ||
1530 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1531 | LSP_FRAGMENT(lsp_id) = 0; | |
1532 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1533 | ||
1534 | /* | |
1535 | * If for some reason have a pseudo LSP in the db already -> regenerate | |
1536 | */ | |
1537 | if (lsp_search(lsp_id, lspdb)) | |
1538 | return lsp_regenerate_schedule_pseudo(circuit, level); | |
1539 | ||
1540 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); | |
1541 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
1542 | lsp = lsp_new(circuit->area, lsp_id, rem_lifetime, 1, | |
1543 | circuit->area->is_type | circuit->area->attached_bit, 0, | |
8f5dbe18 | 1544 | NULL, level); |
d62a17ae | 1545 | lsp->area = circuit->area; |
1546 | ||
1547 | lsp_build_pseudo(lsp, circuit, level); | |
af8ac8f9 | 1548 | lsp_pack_pdu(lsp); |
d62a17ae | 1549 | lsp->own_lsp = 1; |
1550 | lsp_insert(lsp, lspdb); | |
1551 | lsp_set_all_srmflags(lsp); | |
1552 | ||
1553 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1554 | THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1555 | circuit->lsp_regenerate_pending[level - 1] = 0; | |
1556 | if (level == IS_LEVEL_1) | |
1557 | thread_add_timer( | |
1558 | master, lsp_l1_refresh_pseudo, circuit, refresh_time, | |
1559 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1560 | else if (level == IS_LEVEL_2) | |
1561 | thread_add_timer( | |
1562 | master, lsp_l2_refresh_pseudo, circuit, refresh_time, | |
1563 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1564 | ||
1565 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1566 | zlog_debug( | |
af8ac8f9 CF |
1567 | "ISIS-Upd (%s): Built L%d Pseudo LSP %s, len %" PRIu16 |
1568 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1569 | ", lifetime %" PRIu16 "s, refresh %" PRIu16 "s", | |
d62a17ae | 1570 | circuit->area->area_tag, level, |
af8ac8f9 CF |
1571 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len, |
1572 | lsp->hdr.seqno, lsp->hdr.checksum, | |
1573 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1574 | } |
1575 | ||
1576 | return ISIS_OK; | |
3f045a08 JB |
1577 | } |
1578 | ||
d62a17ae | 1579 | static int lsp_regenerate_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1580 | { |
d62a17ae | 1581 | dict_t *lspdb = circuit->area->lspdb[level - 1]; |
1582 | struct isis_lsp *lsp; | |
1583 | u_char lsp_id[ISIS_SYS_ID_LEN + 2]; | |
1584 | u_int16_t rem_lifetime, refresh_time; | |
1585 | ||
1586 | if ((circuit->is_type & level) != level | |
1587 | || (circuit->state != C_STATE_UP) | |
1588 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1589 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1590 | return ISIS_ERROR; | |
1591 | ||
1592 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1593 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1594 | LSP_FRAGMENT(lsp_id) = 0; | |
1595 | ||
1596 | lsp = lsp_search(lsp_id, lspdb); | |
1597 | ||
1598 | if (!lsp) { | |
1599 | zlog_err("lsp_regenerate_pseudo: no l%d LSP %s found!", level, | |
1600 | rawlspid_print(lsp_id)); | |
1601 | return ISIS_ERROR; | |
1602 | } | |
d62a17ae | 1603 | |
d62a17ae | 1604 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); |
af8ac8f9 CF |
1605 | lsp->hdr.rem_lifetime = rem_lifetime; |
1606 | lsp_build_pseudo(lsp, circuit, level); | |
1607 | lsp_inc_seqno(lsp, 0); | |
d62a17ae | 1608 | lsp->last_generated = time(NULL); |
1609 | lsp_set_all_srmflags(lsp); | |
1610 | ||
1611 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1612 | if (level == IS_LEVEL_1) | |
1613 | thread_add_timer( | |
1614 | master, lsp_l1_refresh_pseudo, circuit, refresh_time, | |
1615 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1616 | else if (level == IS_LEVEL_2) | |
1617 | thread_add_timer( | |
1618 | master, lsp_l2_refresh_pseudo, circuit, refresh_time, | |
1619 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1620 | ||
1621 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1622 | zlog_debug( | |
af8ac8f9 CF |
1623 | "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %s, len %" PRIu16 |
1624 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1625 | ", lifetime %" PRIu16 "s, refresh %" PRIu16 "s", | |
d62a17ae | 1626 | circuit->area->area_tag, level, |
af8ac8f9 CF |
1627 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len, |
1628 | lsp->hdr.seqno, lsp->hdr.checksum, | |
1629 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1630 | } |
1631 | ||
1632 | return ISIS_OK; | |
eb5d44eb | 1633 | } |
1634 | ||
3f045a08 JB |
1635 | /* |
1636 | * Something has changed or periodic refresh -> regenerate pseudo LSP | |
1637 | */ | |
d62a17ae | 1638 | static int lsp_l1_refresh_pseudo(struct thread *thread) |
eb5d44eb | 1639 | { |
d62a17ae | 1640 | struct isis_circuit *circuit; |
1641 | u_char id[ISIS_SYS_ID_LEN + 2]; | |
eb5d44eb | 1642 | |
d62a17ae | 1643 | circuit = THREAD_ARG(thread); |
f390d2c7 | 1644 | |
d62a17ae | 1645 | circuit->u.bc.t_refresh_pseudo_lsp[0] = NULL; |
1646 | circuit->lsp_regenerate_pending[0] = 0; | |
13c48f72 | 1647 | |
d62a17ae | 1648 | if ((circuit->u.bc.is_dr[0] == 0) |
1649 | || (circuit->is_type & IS_LEVEL_1) == 0) { | |
1650 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1651 | LSP_PSEUDO_ID(id) = circuit->circuit_id; | |
1652 | LSP_FRAGMENT(id) = 0; | |
1653 | lsp_purge_pseudo(id, circuit, IS_LEVEL_1); | |
1654 | return ISIS_ERROR; | |
1655 | } | |
eb5d44eb | 1656 | |
d62a17ae | 1657 | return lsp_regenerate_pseudo(circuit, IS_LEVEL_1); |
eb5d44eb | 1658 | } |
1659 | ||
d62a17ae | 1660 | static int lsp_l2_refresh_pseudo(struct thread *thread) |
eb5d44eb | 1661 | { |
d62a17ae | 1662 | struct isis_circuit *circuit; |
1663 | u_char id[ISIS_SYS_ID_LEN + 2]; | |
f390d2c7 | 1664 | |
d62a17ae | 1665 | circuit = THREAD_ARG(thread); |
f390d2c7 | 1666 | |
d62a17ae | 1667 | circuit->u.bc.t_refresh_pseudo_lsp[1] = NULL; |
1668 | circuit->lsp_regenerate_pending[1] = 0; | |
13c48f72 | 1669 | |
d62a17ae | 1670 | if ((circuit->u.bc.is_dr[1] == 0) |
1671 | || (circuit->is_type & IS_LEVEL_2) == 0) { | |
1672 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1673 | LSP_PSEUDO_ID(id) = circuit->circuit_id; | |
1674 | LSP_FRAGMENT(id) = 0; | |
1675 | lsp_purge_pseudo(id, circuit, IS_LEVEL_2); | |
1676 | return ISIS_ERROR; | |
1677 | } | |
eb5d44eb | 1678 | |
d62a17ae | 1679 | return lsp_regenerate_pseudo(circuit, IS_LEVEL_2); |
eb5d44eb | 1680 | } |
1681 | ||
d62a17ae | 1682 | int lsp_regenerate_schedule_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1683 | { |
d62a17ae | 1684 | struct isis_lsp *lsp; |
1685 | u_char lsp_id[ISIS_SYS_ID_LEN + 2]; | |
1686 | time_t now, diff; | |
1687 | long timeout; | |
1688 | int lvl; | |
1689 | struct isis_area *area = circuit->area; | |
1690 | ||
1691 | if (circuit->circ_type != CIRCUIT_T_BROADCAST | |
1692 | || circuit->state != C_STATE_UP) | |
1693 | return ISIS_OK; | |
1694 | ||
1695 | sched_debug( | |
1696 | "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s", | |
1697 | area->area_tag, circuit_t2string(level), | |
1698 | circuit->interface->name); | |
1699 | ||
1700 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1701 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1702 | LSP_FRAGMENT(lsp_id) = 0; | |
1703 | now = time(NULL); | |
1704 | ||
1705 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1706 | sched_debug( | |
1707 | "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled", | |
1708 | area->area_tag, lvl); | |
1709 | ||
1710 | if (!((level & lvl) && (circuit->is_type & lvl))) { | |
1711 | sched_debug("ISIS (%s): Level is not active on circuit", | |
1712 | area->area_tag); | |
1713 | continue; | |
1714 | } | |
1715 | ||
1716 | if (circuit->u.bc.is_dr[lvl - 1] == 0) { | |
1717 | sched_debug( | |
1718 | "ISIS (%s): This IS is not DR, nothing to do.", | |
1719 | area->area_tag); | |
1720 | continue; | |
1721 | } | |
1722 | ||
1723 | if (circuit->lsp_regenerate_pending[lvl - 1]) { | |
1724 | struct timeval remain = thread_timer_remain( | |
1725 | circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1726 | sched_debug( | |
1727 | "ISIS (%s): Regenerate is already pending, nothing todo." | |
1728 | " (Due in %lld.%03lld seconds)", | |
1729 | area->area_tag, (long long)remain.tv_sec, | |
1730 | (long long)remain.tv_usec / 1000); | |
1731 | continue; | |
1732 | } | |
1733 | ||
1734 | lsp = lsp_search(lsp_id, circuit->area->lspdb[lvl - 1]); | |
1735 | if (!lsp) { | |
1736 | sched_debug( | |
1737 | "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.", | |
1738 | area->area_tag); | |
1739 | continue; | |
1740 | } | |
1741 | ||
1742 | /* | |
1743 | * Throttle avoidance | |
1744 | */ | |
1745 | sched_debug( | |
1746 | "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld", | |
1747 | area->area_tag, (long long)lsp->last_generated, | |
1748 | (long long)now); | |
1749 | THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1750 | diff = now - lsp->last_generated; | |
1751 | if (diff < circuit->area->lsp_gen_interval[lvl - 1]) { | |
9d303b37 DL |
1752 | timeout = |
1753 | 1000 * (circuit->area->lsp_gen_interval[lvl - 1] | |
1754 | - diff); | |
d62a17ae | 1755 | sched_debug( |
1756 | "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval", | |
1757 | area->area_tag, timeout); | |
1758 | } else { | |
1759 | timeout = 100; | |
1760 | sched_debug( | |
1761 | "ISIS (%s): Last generation was more than lsp_gen_interval ago." | |
1762 | " Scheduling for execution in %ld ms.", | |
1763 | area->area_tag, timeout); | |
1764 | } | |
1765 | ||
1766 | circuit->lsp_regenerate_pending[lvl - 1] = 1; | |
1767 | ||
1768 | if (lvl == IS_LEVEL_1) { | |
1769 | thread_add_timer_msec( | |
1770 | master, lsp_l1_refresh_pseudo, circuit, timeout, | |
1771 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1772 | } else if (lvl == IS_LEVEL_2) { | |
1773 | thread_add_timer_msec( | |
1774 | master, lsp_l2_refresh_pseudo, circuit, timeout, | |
1775 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1776 | } | |
1777 | } | |
1778 | ||
1779 | return ISIS_OK; | |
f390d2c7 | 1780 | } |
eb5d44eb | 1781 | |
1782 | /* | |
1783 | * Walk through LSPs for an area | |
1784 | * - set remaining lifetime | |
1785 | * - set LSPs with SRMflag set for sending | |
1786 | */ | |
d62a17ae | 1787 | int lsp_tick(struct thread *thread) |
eb5d44eb | 1788 | { |
d62a17ae | 1789 | struct isis_area *area; |
1790 | struct isis_circuit *circuit; | |
1791 | struct isis_lsp *lsp; | |
1792 | struct list *lsp_list; | |
1793 | struct listnode *lspnode, *cnode; | |
1794 | dnode_t *dnode, *dnode_next; | |
1795 | int level; | |
1796 | u_int16_t rem_lifetime; | |
e5973ce5 | 1797 | time_t now = monotime(NULL); |
d62a17ae | 1798 | |
1799 | lsp_list = list_new(); | |
1800 | ||
1801 | area = THREAD_ARG(thread); | |
1802 | assert(area); | |
1803 | area->t_tick = NULL; | |
1804 | thread_add_timer(master, lsp_tick, area, 1, &area->t_tick); | |
1805 | ||
1806 | /* | |
1807 | * Build a list of LSPs with (any) SRMflag set | |
1808 | * and removed the ones that have aged out | |
1809 | */ | |
1810 | for (level = 0; level < ISIS_LEVELS; level++) { | |
1811 | if (area->lspdb[level] && dict_count(area->lspdb[level]) > 0) { | |
1812 | for (dnode = dict_first(area->lspdb[level]); | |
1813 | dnode != NULL; dnode = dnode_next) { | |
1814 | dnode_next = | |
1815 | dict_next(area->lspdb[level], dnode); | |
1816 | lsp = dnode_get(dnode); | |
1817 | ||
1818 | /* | |
1819 | * The lsp rem_lifetime is kept at 0 for MaxAge | |
1820 | * or | |
1821 | * ZeroAgeLifetime depending on explicit purge | |
1822 | * or | |
1823 | * natural age out. So schedule spf only once | |
1824 | * when | |
1825 | * the first time rem_lifetime becomes 0. | |
1826 | */ | |
af8ac8f9 | 1827 | rem_lifetime = lsp->hdr.rem_lifetime; |
d62a17ae | 1828 | lsp_set_time(lsp); |
1829 | ||
1830 | /* | |
1831 | * Schedule may run spf which should be done | |
1832 | * only after | |
1833 | * the lsp rem_lifetime becomes 0 for the first | |
1834 | * time. | |
1835 | * ISO 10589 - 7.3.16.4 first paragraph. | |
1836 | */ | |
af8ac8f9 | 1837 | if (rem_lifetime == 1 && lsp->hdr.seqno != 0) { |
d62a17ae | 1838 | /* 7.3.16.4 a) set SRM flags on all */ |
1839 | lsp_set_all_srmflags(lsp); | |
1840 | /* 7.3.16.4 b) retain only the header | |
1841 | * FIXME */ | |
1842 | /* 7.3.16.4 c) record the time to purge | |
1843 | * FIXME */ | |
1844 | /* run/schedule spf */ | |
1845 | /* isis_spf_schedule is called inside | |
1846 | * lsp_destroy() below; | |
1847 | * so it is not needed here. */ | |
1848 | /* isis_spf_schedule (lsp->area, | |
1849 | * lsp->level); */ | |
1850 | } | |
1851 | ||
1852 | if (lsp->age_out == 0) { | |
1853 | zlog_debug( | |
af8ac8f9 CF |
1854 | "ISIS-Upd (%s): L%u LSP %s seq " |
1855 | "0x%08" PRIx32 " aged out", | |
d62a17ae | 1856 | area->area_tag, lsp->level, |
af8ac8f9 CF |
1857 | rawlspid_print(lsp->hdr.lsp_id), |
1858 | lsp->hdr.seqno); | |
d62a17ae | 1859 | lsp_destroy(lsp); |
1860 | lsp = NULL; | |
1861 | dict_delete_free(area->lspdb[level], | |
1862 | dnode); | |
1863 | } else if (flags_any_set(lsp->SRMflags)) | |
1864 | listnode_add(lsp_list, lsp); | |
1865 | } | |
1866 | ||
1867 | /* | |
1868 | * Send LSPs on circuits indicated by the SRMflags | |
1869 | */ | |
1870 | if (listcount(lsp_list) > 0) { | |
1871 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, | |
1872 | cnode, circuit)) { | |
58e16237 | 1873 | if (!circuit->lsp_queue) |
d62a17ae | 1874 | continue; |
58e16237 | 1875 | |
e5973ce5 CF |
1876 | if (now - circuit->lsp_queue_last_push |
1877 | < MIN_LSP_RETRANS_INTERVAL) { | |
58e16237 CF |
1878 | continue; |
1879 | } | |
1880 | ||
e5973ce5 CF |
1881 | circuit->lsp_queue_last_push = now; |
1882 | ||
d62a17ae | 1883 | for (ALL_LIST_ELEMENTS_RO( |
1884 | lsp_list, lspnode, lsp)) { | |
1885 | if (circuit->upadjcount | |
1886 | [lsp->level - 1] | |
1887 | && ISIS_CHECK_FLAG( | |
1888 | lsp->SRMflags, | |
1889 | circuit)) { | |
58e16237 | 1890 | isis_circuit_queue_lsp(circuit, lsp); |
d62a17ae | 1891 | } |
1892 | } | |
1893 | } | |
1894 | list_delete_all_node(lsp_list); | |
1895 | } | |
1896 | } | |
1897 | } | |
1898 | ||
affe9e99 | 1899 | list_delete_and_null(&lsp_list); |
d62a17ae | 1900 | |
1901 | return ISIS_OK; | |
eb5d44eb | 1902 | } |
1903 | ||
d62a17ae | 1904 | void lsp_purge_pseudo(u_char *id, struct isis_circuit *circuit, int level) |
eb5d44eb | 1905 | { |
d62a17ae | 1906 | struct isis_lsp *lsp; |
d62a17ae | 1907 | |
1908 | lsp = lsp_search(id, circuit->area->lspdb[level - 1]); | |
1909 | if (!lsp) | |
1910 | return; | |
1911 | ||
af8ac8f9 | 1912 | lsp_purge(lsp, level); |
eb5d44eb | 1913 | } |
1914 | ||
1915 | /* | |
d62a17ae | 1916 | * Purge own LSP that is received and we don't have. |
eb5d44eb | 1917 | * -> Do as in 7.3.16.4 |
1918 | */ | |
af8ac8f9 | 1919 | void lsp_purge_non_exist(int level, struct isis_lsp_hdr *hdr, |
d62a17ae | 1920 | struct isis_area *area) |
eb5d44eb | 1921 | { |
d62a17ae | 1922 | struct isis_lsp *lsp; |
1923 | ||
1924 | /* | |
1925 | * We need to create the LSP to be purged | |
1926 | */ | |
1927 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
1928 | lsp->area = area; | |
1929 | lsp->level = level; | |
1930 | lsp->pdu = stream_new(LLC_LEN + area->lsp_mtu); | |
af8ac8f9 | 1931 | lsp->age_out = ZERO_AGE_LIFETIME; |
d62a17ae | 1932 | |
af8ac8f9 CF |
1933 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
1934 | lsp->hdr.rem_lifetime = 0; | |
d62a17ae | 1935 | |
af8ac8f9 | 1936 | lsp_pack_pdu(lsp); |
d62a17ae | 1937 | |
d62a17ae | 1938 | lsp_insert(lsp, area->lspdb[lsp->level - 1]); |
d62a17ae | 1939 | lsp_set_all_srmflags(lsp); |
1940 | ||
1941 | return; | |
eb5d44eb | 1942 | } |
1943 | ||
d62a17ae | 1944 | void lsp_set_all_srmflags(struct isis_lsp *lsp) |
3f045a08 | 1945 | { |
d62a17ae | 1946 | struct listnode *node; |
1947 | struct isis_circuit *circuit; | |
3f045a08 | 1948 | |
d62a17ae | 1949 | assert(lsp); |
3f045a08 | 1950 | |
d62a17ae | 1951 | ISIS_FLAGS_CLEAR_ALL(lsp->SRMflags); |
3f045a08 | 1952 | |
d62a17ae | 1953 | if (lsp->area) { |
1954 | struct list *circuit_list = lsp->area->circuit_list; | |
1955 | for (ALL_LIST_ELEMENTS_RO(circuit_list, node, circuit)) { | |
1956 | ISIS_SET_FLAG(lsp->SRMflags, circuit); | |
1957 | } | |
1958 | } | |
3f045a08 | 1959 | } |