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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" |
d43d2df5 | 40 | #include "srcdest_table.h" |
38937bd5 | 41 | #include "lib_errors.h" |
eb5d44eb | 42 | |
43 | #include "isisd/dict.h" | |
44 | #include "isisd/isis_constants.h" | |
45 | #include "isisd/isis_common.h" | |
3f045a08 | 46 | #include "isisd/isis_flags.h" |
eb5d44eb | 47 | #include "isisd/isis_circuit.h" |
48 | #include "isisd/isisd.h" | |
eb5d44eb | 49 | #include "isisd/isis_lsp.h" |
50 | #include "isisd/isis_pdu.h" | |
51 | #include "isisd/isis_dynhn.h" | |
52 | #include "isisd/isis_misc.h" | |
eb5d44eb | 53 | #include "isisd/isis_csm.h" |
54 | #include "isisd/isis_adjacency.h" | |
55 | #include "isisd/isis_spf.h" | |
f8c06e2c | 56 | #include "isisd/isis_te.h" |
99894f9a | 57 | #include "isisd/isis_mt.h" |
841791b6 | 58 | #include "isisd/isis_tlvs.h" |
8e6fb83b | 59 | #include "isisd/fabricd.h" |
9b39405f | 60 | #include "isisd/isis_tx_queue.h" |
eb5d44eb | 61 | |
d62a17ae | 62 | static int lsp_l1_refresh(struct thread *thread); |
63 | static int lsp_l2_refresh(struct thread *thread); | |
64 | static int lsp_l1_refresh_pseudo(struct thread *thread); | |
65 | static int lsp_l2_refresh_pseudo(struct thread *thread); | |
3f045a08 | 66 | |
d7c0a89a | 67 | int lsp_id_cmp(uint8_t *id1, uint8_t *id2) |
f390d2c7 | 68 | { |
d62a17ae | 69 | return memcmp(id1, id2, ISIS_SYS_ID_LEN + 2); |
eb5d44eb | 70 | } |
71 | ||
d62a17ae | 72 | dict_t *lsp_db_init(void) |
eb5d44eb | 73 | { |
d62a17ae | 74 | dict_t *dict; |
f390d2c7 | 75 | |
d62a17ae | 76 | dict = dict_create(DICTCOUNT_T_MAX, (dict_comp_t)lsp_id_cmp); |
f390d2c7 | 77 | |
d62a17ae | 78 | return dict; |
eb5d44eb | 79 | } |
80 | ||
d7c0a89a | 81 | struct isis_lsp *lsp_search(uint8_t *id, dict_t *lspdb) |
eb5d44eb | 82 | { |
d62a17ae | 83 | dnode_t *node; |
eb5d44eb | 84 | |
f390d2c7 | 85 | #ifdef EXTREME_DEBUG |
d62a17ae | 86 | dnode_t *dn; |
87 | ||
88 | zlog_debug("searching db"); | |
89 | for (dn = dict_first(lspdb); dn; dn = dict_next(lspdb, dn)) { | |
90 | zlog_debug("%s\t%pX", | |
d7c0a89a | 91 | rawlspid_print((uint8_t *)dnode_getkey(dn)), |
d62a17ae | 92 | dnode_get(dn)); |
93 | } | |
eb5d44eb | 94 | #endif /* EXTREME DEBUG */ |
95 | ||
d62a17ae | 96 | node = dict_lookup(lspdb, id); |
f390d2c7 | 97 | |
d62a17ae | 98 | if (node) |
99 | return (struct isis_lsp *)dnode_get(node); | |
eb5d44eb | 100 | |
d62a17ae | 101 | return NULL; |
eb5d44eb | 102 | } |
103 | ||
d62a17ae | 104 | static void lsp_clear_data(struct isis_lsp *lsp) |
eb5d44eb | 105 | { |
d62a17ae | 106 | if (!lsp) |
107 | return; | |
108 | ||
af8ac8f9 CF |
109 | isis_free_tlvs(lsp->tlvs); |
110 | lsp->tlvs = NULL; | |
eb5d44eb | 111 | } |
112 | ||
d62a17ae | 113 | static void lsp_destroy(struct isis_lsp *lsp) |
eb5d44eb | 114 | { |
58e16237 | 115 | struct listnode *cnode; |
d62a17ae | 116 | struct isis_circuit *circuit; |
117 | ||
118 | if (!lsp) | |
119 | return; | |
120 | ||
58e16237 | 121 | for (ALL_LIST_ELEMENTS_RO(lsp->area->circuit_list, cnode, circuit)) |
9b39405f | 122 | isis_tx_queue_del(circuit->tx_queue, lsp); |
58e16237 | 123 | |
d62a17ae | 124 | ISIS_FLAGS_CLEAR_ALL(lsp->SSNflags); |
d62a17ae | 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 | ||
d7c0a89a | 179 | void lsp_search_and_destroy(uint8_t *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; | |
b599ec55 | 289 | size_t orig_getp = 0, orig_endp = 0; |
c55018ab CF |
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); | |
9b39405f | 369 | lsp_flood(lsp, NULL); |
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 | ||
d7c0a89a | 395 | static uint8_t lsp_bits_generate(int level, int overload_bit, int attached_bit) |
e38e0df0 | 396 | { |
d7c0a89a | 397 | uint8_t lsp_bits = 0; |
d62a17ae | 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) { |
af4c2728 | 458 | flog_err( |
38937bd5 | 459 | LIB_ERR_DEVELOPMENT, |
d62a17ae | 460 | "ISIS-Upd (%s): BUG updating LSP %s still marked as own LSP", |
af8ac8f9 | 461 | area->area_tag, rawlspid_print(lsp->hdr.lsp_id)); |
d62a17ae | 462 | lsp_clear_data(lsp); |
463 | lsp->own_lsp = 0; | |
464 | } | |
465 | ||
c55018ab | 466 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); |
164066e4 | 467 | if (confusion) { |
c55018ab CF |
468 | lsp->hdr.rem_lifetime = hdr->rem_lifetime = 0; |
469 | put_lsp_hdr(lsp, NULL, true); | |
164066e4 | 470 | } |
d62a17ae | 471 | |
0b8b6cab CF |
472 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) && !lsp->lspu.zero_lsp) { |
473 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
474 | struct isis_lsp *lsp0; | |
eb5d44eb | 475 | |
0b8b6cab CF |
476 | memcpy(lspid, lsp->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); |
477 | LSP_FRAGMENT(lspid) = 0; | |
478 | lsp0 = lsp_search(lspid, area->lspdb[level - 1]); | |
479 | if (lsp0) | |
480 | lsp_link_fragment(lsp, lsp0); | |
8f5dbe18 | 481 | } |
0b8b6cab | 482 | |
5304211a CF |
483 | if (lsp->hdr.seqno) |
484 | isis_spf_schedule(lsp->area, lsp->level); | |
8f5dbe18 CF |
485 | } |
486 | ||
eb5d44eb | 487 | /* creation of LSP directly from what we received */ |
af8ac8f9 CF |
488 | struct isis_lsp *lsp_new_from_recv(struct isis_lsp_hdr *hdr, |
489 | struct isis_tlvs *tlvs, | |
490 | struct stream *stream, struct isis_lsp *lsp0, | |
491 | struct isis_area *area, int level) | |
eb5d44eb | 492 | { |
d62a17ae | 493 | struct isis_lsp *lsp; |
494 | ||
495 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
af8ac8f9 | 496 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); |
8f5dbe18 | 497 | lsp_link_fragment(lsp, lsp0); |
d62a17ae | 498 | |
499 | return lsp; | |
eb5d44eb | 500 | } |
501 | ||
d7c0a89a | 502 | struct isis_lsp *lsp_new(struct isis_area *area, uint8_t *lsp_id, |
af8ac8f9 | 503 | uint16_t rem_lifetime, uint32_t seqno, |
8f5dbe18 CF |
504 | uint8_t lsp_bits, uint16_t checksum, |
505 | struct isis_lsp *lsp0, int level) | |
eb5d44eb | 506 | { |
d62a17ae | 507 | struct isis_lsp *lsp; |
508 | ||
509 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
510 | lsp->area = area; | |
511 | ||
512 | lsp->pdu = stream_new(LLC_LEN + area->lsp_mtu); | |
d62a17ae | 513 | |
d62a17ae | 514 | /* Minimal LSP PDU size */ |
af8ac8f9 CF |
515 | lsp->hdr.pdu_len = ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN; |
516 | memcpy(lsp->hdr.lsp_id, lsp_id, sizeof(lsp->hdr.lsp_id)); | |
517 | lsp->hdr.checksum = checksum; | |
518 | lsp->hdr.seqno = seqno; | |
519 | lsp->hdr.rem_lifetime = rem_lifetime; | |
520 | lsp->hdr.lsp_bits = lsp_bits; | |
d62a17ae | 521 | lsp->level = level; |
522 | lsp->age_out = ZERO_AGE_LIFETIME; | |
8f5dbe18 | 523 | lsp_link_fragment(lsp, lsp0); |
c55018ab | 524 | put_lsp_hdr(lsp, NULL, false); |
d62a17ae | 525 | |
526 | if (isis->debugs & DEBUG_EVENTS) | |
527 | zlog_debug("New LSP with ID %s-%02x-%02x len %d seqnum %08x", | |
af8ac8f9 CF |
528 | sysid_print(lsp_id), LSP_PSEUDO_ID(lsp->hdr.lsp_id), |
529 | LSP_FRAGMENT(lsp->hdr.lsp_id), lsp->hdr.pdu_len, | |
530 | lsp->hdr.seqno); | |
d62a17ae | 531 | |
532 | return lsp; | |
eb5d44eb | 533 | } |
534 | ||
d62a17ae | 535 | void lsp_insert(struct isis_lsp *lsp, dict_t *lspdb) |
eb5d44eb | 536 | { |
af8ac8f9 CF |
537 | dict_alloc_insert(lspdb, lsp->hdr.lsp_id, lsp); |
538 | if (lsp->hdr.seqno) | |
d62a17ae | 539 | isis_spf_schedule(lsp->area, lsp->level); |
eb5d44eb | 540 | } |
541 | ||
542 | /* | |
543 | * Build a list of LSPs with non-zero ht bounded by start and stop ids | |
544 | */ | |
d7c0a89a | 545 | void lsp_build_list_nonzero_ht(uint8_t *start_id, uint8_t *stop_id, |
d62a17ae | 546 | struct list *list, dict_t *lspdb) |
eb5d44eb | 547 | { |
d62a17ae | 548 | dnode_t *first, *last, *curr; |
eb5d44eb | 549 | |
d62a17ae | 550 | first = dict_lower_bound(lspdb, start_id); |
551 | if (!first) | |
552 | return; | |
f390d2c7 | 553 | |
d62a17ae | 554 | last = dict_upper_bound(lspdb, stop_id); |
f390d2c7 | 555 | |
d62a17ae | 556 | curr = first; |
f390d2c7 | 557 | |
af8ac8f9 | 558 | if (((struct isis_lsp *)(curr->dict_data))->hdr.rem_lifetime) |
d62a17ae | 559 | listnode_add(list, first->dict_data); |
eb5d44eb | 560 | |
d62a17ae | 561 | while (curr) { |
562 | curr = dict_next(lspdb, curr); | |
563 | if (curr | |
af8ac8f9 | 564 | && ((struct isis_lsp *)(curr->dict_data))->hdr.rem_lifetime) |
d62a17ae | 565 | listnode_add(list, curr->dict_data); |
566 | if (curr == last) | |
567 | break; | |
568 | } | |
f390d2c7 | 569 | |
d62a17ae | 570 | return; |
eb5d44eb | 571 | } |
572 | ||
d62a17ae | 573 | static void lsp_set_time(struct isis_lsp *lsp) |
eb5d44eb | 574 | { |
d62a17ae | 575 | assert(lsp); |
f390d2c7 | 576 | |
af8ac8f9 | 577 | if (lsp->hdr.rem_lifetime == 0) { |
d62a17ae | 578 | if (lsp->age_out > 0) |
579 | lsp->age_out--; | |
580 | return; | |
581 | } | |
eb5d44eb | 582 | |
af8ac8f9 CF |
583 | lsp->hdr.rem_lifetime--; |
584 | if (lsp->pdu && stream_get_endp(lsp->pdu) >= 12) | |
585 | stream_putw_at(lsp->pdu, 10, lsp->hdr.rem_lifetime); | |
eb5d44eb | 586 | } |
587 | ||
d7c0a89a | 588 | static void lspid_print(uint8_t *lsp_id, uint8_t *trg, char dynhost, char frag) |
eb5d44eb | 589 | { |
d62a17ae | 590 | struct isis_dynhn *dyn = NULL; |
d7c0a89a | 591 | uint8_t id[SYSID_STRLEN]; |
d62a17ae | 592 | |
593 | if (dynhost) | |
594 | dyn = dynhn_find_by_id(lsp_id); | |
595 | else | |
596 | dyn = NULL; | |
597 | ||
598 | if (dyn) | |
af8ac8f9 | 599 | sprintf((char *)id, "%.14s", dyn->hostname); |
d62a17ae | 600 | else if (!memcmp(isis->sysid, lsp_id, ISIS_SYS_ID_LEN) && dynhost) |
6b3ee3a0 | 601 | sprintf((char *)id, "%.14s", cmd_hostname_get()); |
d62a17ae | 602 | else |
603 | memcpy(id, sysid_print(lsp_id), 15); | |
604 | if (frag) | |
605 | sprintf((char *)trg, "%s.%02x-%02x", id, LSP_PSEUDO_ID(lsp_id), | |
606 | LSP_FRAGMENT(lsp_id)); | |
607 | else | |
608 | sprintf((char *)trg, "%s.%02x", id, LSP_PSEUDO_ID(lsp_id)); | |
eb5d44eb | 609 | } |
610 | ||
f390d2c7 | 611 | /* Convert the lsp attribute bits to attribute string */ |
36228974 | 612 | static const char *lsp_bits2string(uint8_t lsp_bits, char *buf, size_t buf_size) |
f390d2c7 | 613 | { |
36228974 | 614 | char *pos = buf; |
eb5d44eb | 615 | |
af8ac8f9 | 616 | if (!lsp_bits) |
d62a17ae | 617 | return " none"; |
eb5d44eb | 618 | |
36228974 | 619 | if (buf_size < 2 * 3) |
620 | return " error"; | |
621 | ||
d62a17ae | 622 | /* we only focus on the default metric */ |
623 | pos += sprintf(pos, "%d/", | |
af8ac8f9 | 624 | ISIS_MASK_LSP_ATT_DEFAULT_BIT(lsp_bits) ? 1 : 0); |
eb5d44eb | 625 | |
d62a17ae | 626 | pos += sprintf(pos, "%d/", |
af8ac8f9 | 627 | ISIS_MASK_LSP_PARTITION_BIT(lsp_bits) ? 1 : 0); |
f390d2c7 | 628 | |
e36e5b56 | 629 | sprintf(pos, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits) ? 1 : 0); |
eb5d44eb | 630 | |
36228974 | 631 | return buf; |
eb5d44eb | 632 | } |
633 | ||
634 | /* this function prints the lsp on show isis database */ | |
d62a17ae | 635 | void lsp_print(struct isis_lsp *lsp, struct vty *vty, char dynhost) |
eb5d44eb | 636 | { |
d7c0a89a | 637 | uint8_t LSPid[255]; |
d62a17ae | 638 | char age_out[8]; |
36228974 | 639 | char b[200]; |
d62a17ae | 640 | |
af8ac8f9 | 641 | lspid_print(lsp->hdr.lsp_id, LSPid, dynhost, 1); |
d62a17ae | 642 | vty_out(vty, "%-21s%c ", LSPid, lsp->own_lsp ? '*' : ' '); |
af8ac8f9 CF |
643 | vty_out(vty, "%5" PRIu16 " ", lsp->hdr.pdu_len); |
644 | vty_out(vty, "0x%08" PRIx32 " ", lsp->hdr.seqno); | |
645 | vty_out(vty, "0x%04" PRIx16 " ", lsp->hdr.checksum); | |
646 | if (lsp->hdr.rem_lifetime == 0) { | |
647 | snprintf(age_out, 8, "(%d)", lsp->age_out); | |
d62a17ae | 648 | age_out[7] = '\0'; |
649 | vty_out(vty, "%7s ", age_out); | |
650 | } else | |
af8ac8f9 | 651 | vty_out(vty, " %5" PRIu16 " ", lsp->hdr.rem_lifetime); |
36228974 | 652 | vty_out(vty, "%s\n", lsp_bits2string(lsp->hdr.lsp_bits, b, sizeof(b))); |
c3ae3127 CF |
653 | } |
654 | ||
d62a17ae | 655 | void lsp_print_detail(struct isis_lsp *lsp, struct vty *vty, char dynhost) |
eb5d44eb | 656 | { |
d62a17ae | 657 | lsp_print(lsp, vty, dynhost); |
af8ac8f9 CF |
658 | if (lsp->tlvs) |
659 | vty_multiline(vty, " ", "%s", isis_format_tlvs(lsp->tlvs)); | |
d62a17ae | 660 | vty_out(vty, "\n"); |
eb5d44eb | 661 | } |
662 | ||
663 | /* print all the lsps info in the local lspdb */ | |
d62a17ae | 664 | int lsp_print_all(struct vty *vty, dict_t *lspdb, char detail, char dynhost) |
eb5d44eb | 665 | { |
666 | ||
d62a17ae | 667 | dnode_t *node = dict_first(lspdb), *next; |
668 | int lsp_count = 0; | |
669 | ||
670 | if (detail == ISIS_UI_LEVEL_BRIEF) { | |
671 | while (node != NULL) { | |
672 | /* I think it is unnecessary, so I comment it out */ | |
673 | /* dict_contains (lspdb, node); */ | |
674 | next = dict_next(lspdb, node); | |
675 | lsp_print(dnode_get(node), vty, dynhost); | |
676 | node = next; | |
677 | lsp_count++; | |
678 | } | |
679 | } else if (detail == ISIS_UI_LEVEL_DETAIL) { | |
680 | while (node != NULL) { | |
681 | next = dict_next(lspdb, node); | |
682 | lsp_print_detail(dnode_get(node), vty, dynhost); | |
683 | node = next; | |
684 | lsp_count++; | |
685 | } | |
686 | } | |
687 | ||
688 | return lsp_count; | |
eb5d44eb | 689 | } |
690 | ||
d7c0a89a | 691 | static uint16_t lsp_rem_lifetime(struct isis_area *area, int level) |
3f045a08 | 692 | { |
d7c0a89a | 693 | uint16_t rem_lifetime; |
3f045a08 | 694 | |
d62a17ae | 695 | /* Add jitter to configured LSP lifetime */ |
696 | rem_lifetime = | |
697 | isis_jitter(area->max_lsp_lifetime[level - 1], MAX_AGE_JITTER); | |
3f045a08 | 698 | |
d62a17ae | 699 | /* No jitter if the max refresh will be less than configure gen interval |
700 | */ | |
701 | /* N.B. this calucation is acceptable since rem_lifetime is in | |
702 | * [332,65535] at | |
703 | * this point */ | |
704 | if (area->lsp_gen_interval[level - 1] > (rem_lifetime - 300)) | |
705 | rem_lifetime = area->max_lsp_lifetime[level - 1]; | |
3f045a08 | 706 | |
d62a17ae | 707 | return rem_lifetime; |
3f045a08 JB |
708 | } |
709 | ||
d7c0a89a | 710 | static uint16_t lsp_refresh_time(struct isis_lsp *lsp, uint16_t rem_lifetime) |
3f045a08 | 711 | { |
d62a17ae | 712 | struct isis_area *area = lsp->area; |
713 | int level = lsp->level; | |
d7c0a89a | 714 | uint16_t refresh_time; |
3f045a08 | 715 | |
d62a17ae | 716 | /* Add jitter to LSP refresh time */ |
717 | refresh_time = | |
718 | isis_jitter(area->lsp_refresh[level - 1], MAX_LSP_GEN_JITTER); | |
3f045a08 | 719 | |
d62a17ae | 720 | /* RFC 4444 : make sure the refresh time is at least less than 300 |
721 | * of the remaining lifetime and more than gen interval */ | |
722 | if (refresh_time <= area->lsp_gen_interval[level - 1] | |
723 | || refresh_time > (rem_lifetime - 300)) | |
724 | refresh_time = rem_lifetime - 300; | |
3f045a08 | 725 | |
d62a17ae | 726 | /* In cornercases, refresh_time might be <= lsp_gen_interval, however |
727 | * we accept this violation to satisfy refresh_time <= rem_lifetime - | |
728 | * 300 */ | |
3f045a08 | 729 | |
d62a17ae | 730 | return refresh_time; |
3f045a08 JB |
731 | } |
732 | ||
d62a17ae | 733 | static void lsp_build_ext_reach_ipv4(struct isis_lsp *lsp, |
af8ac8f9 | 734 | struct isis_area *area) |
f3ccedaa | 735 | { |
af8ac8f9 | 736 | struct route_table *er_table = get_ext_reach(area, AF_INET, lsp->level); |
d62a17ae | 737 | if (!er_table) |
738 | return; | |
739 | ||
af8ac8f9 CF |
740 | for (struct route_node *rn = route_top(er_table); rn; |
741 | rn = route_next(rn)) { | |
d62a17ae | 742 | if (!rn->info) |
743 | continue; | |
744 | ||
af8ac8f9 CF |
745 | struct prefix_ipv4 *ipv4 = (struct prefix_ipv4 *)&rn->p; |
746 | struct isis_ext_info *info = rn->info; | |
f3ccedaa | 747 | |
af8ac8f9 CF |
748 | uint32_t metric = info->metric; |
749 | if (metric > MAX_WIDE_PATH_METRIC) | |
750 | metric = MAX_WIDE_PATH_METRIC; | |
751 | if (area->oldmetric && metric > 0x3f) | |
752 | metric = 0x3f; | |
d62a17ae | 753 | |
af8ac8f9 CF |
754 | if (area->oldmetric) |
755 | isis_tlvs_add_oldstyle_ip_reach(lsp->tlvs, ipv4, | |
756 | metric); | |
757 | if (area->newmetric) | |
758 | isis_tlvs_add_extended_ip_reach(lsp->tlvs, ipv4, | |
759 | metric); | |
760 | } | |
c3ae3127 CF |
761 | } |
762 | ||
d62a17ae | 763 | static void lsp_build_ext_reach_ipv6(struct isis_lsp *lsp, |
af8ac8f9 | 764 | struct isis_area *area) |
f3ccedaa | 765 | { |
af8ac8f9 CF |
766 | struct route_table *er_table = |
767 | get_ext_reach(area, AF_INET6, lsp->level); | |
d62a17ae | 768 | if (!er_table) |
769 | return; | |
770 | ||
af8ac8f9 | 771 | for (struct route_node *rn = route_top(er_table); rn; |
d43d2df5 | 772 | rn = srcdest_route_next(rn)) { |
d62a17ae | 773 | if (!rn->info) |
774 | continue; | |
af8ac8f9 | 775 | struct isis_ext_info *info = rn->info; |
d62a17ae | 776 | |
d43d2df5 CF |
777 | struct prefix_ipv6 *p, *src_p; |
778 | srcdest_rnode_prefixes(rn, (const struct prefix **)&p, | |
779 | (const struct prefix **)&src_p); | |
780 | ||
af8ac8f9 | 781 | uint32_t metric = info->metric; |
d62a17ae | 782 | if (info->metric > MAX_WIDE_PATH_METRIC) |
af8ac8f9 | 783 | metric = MAX_WIDE_PATH_METRIC; |
d43d2df5 CF |
784 | |
785 | if (!src_p || !src_p->prefixlen) { | |
786 | isis_tlvs_add_ipv6_reach(lsp->tlvs, | |
787 | isis_area_ipv6_topology(area), | |
788 | p, metric); | |
789 | } else if (isis_area_ipv6_dstsrc_enabled(area)) { | |
790 | isis_tlvs_add_ipv6_dstsrc_reach(lsp->tlvs, | |
791 | ISIS_MT_IPV6_DSTSRC, | |
792 | p, src_p, metric); | |
793 | } | |
d62a17ae | 794 | } |
f3ccedaa CF |
795 | } |
796 | ||
af8ac8f9 | 797 | static void lsp_build_ext_reach(struct isis_lsp *lsp, struct isis_area *area) |
f3ccedaa | 798 | { |
af8ac8f9 CF |
799 | lsp_build_ext_reach_ipv4(lsp, area); |
800 | lsp_build_ext_reach_ipv6(lsp, area); | |
801 | } | |
802 | ||
803 | static struct isis_lsp *lsp_next_frag(uint8_t frag_num, struct isis_lsp *lsp0, | |
804 | struct isis_area *area, int level) | |
805 | { | |
806 | struct isis_lsp *lsp; | |
807 | uint8_t frag_id[ISIS_SYS_ID_LEN + 2]; | |
808 | ||
809 | memcpy(frag_id, lsp0->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); | |
810 | LSP_FRAGMENT(frag_id) = frag_num; | |
811 | ||
812 | lsp = lsp_search(frag_id, area->lspdb[level - 1]); | |
813 | if (lsp) { | |
814 | lsp_clear_data(lsp); | |
0b8b6cab CF |
815 | if (!lsp->lspu.zero_lsp) |
816 | lsp_link_fragment(lsp, lsp0); | |
af8ac8f9 CF |
817 | return lsp; |
818 | } | |
819 | ||
820 | lsp = lsp_new(area, frag_id, lsp0->hdr.rem_lifetime, 0, | |
821 | lsp_bits_generate(level, area->overload_bit, | |
822 | area->attached_bit), | |
8f5dbe18 | 823 | 0, lsp0, level); |
af8ac8f9 CF |
824 | lsp->own_lsp = 1; |
825 | lsp_insert(lsp, area->lspdb[level - 1]); | |
af8ac8f9 | 826 | return lsp; |
f3ccedaa CF |
827 | } |
828 | ||
eb5d44eb | 829 | /* |
d62a17ae | 830 | * Builds the LSP data part. This func creates a new frag whenever |
eb5d44eb | 831 | * area->lsp_frag_threshold is exceeded. |
832 | */ | |
d62a17ae | 833 | static void lsp_build(struct isis_lsp *lsp, struct isis_area *area) |
eb5d44eb | 834 | { |
d62a17ae | 835 | int level = lsp->level; |
af8ac8f9 CF |
836 | char buf[PREFIX2STR_BUFFER]; |
837 | struct listnode *node; | |
838 | struct isis_lsp *frag; | |
839 | ||
840 | lsp_clear_data(lsp); | |
841 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) | |
842 | lsp_clear_data(frag); | |
d62a17ae | 843 | |
af8ac8f9 | 844 | lsp->tlvs = isis_alloc_tlvs(); |
d62a17ae | 845 | lsp_debug("ISIS (%s): Constructing local system LSP for level %d", |
846 | area->area_tag, level); | |
847 | ||
af8ac8f9 CF |
848 | lsp->hdr.lsp_bits = lsp_bits_generate(level, area->overload_bit, |
849 | area->attached_bit); | |
d62a17ae | 850 | |
af8ac8f9 | 851 | lsp_add_auth(lsp); |
d62a17ae | 852 | |
af8ac8f9 | 853 | isis_tlvs_add_area_addresses(lsp->tlvs, area->area_addrs); |
d62a17ae | 854 | |
855 | /* Protocols Supported */ | |
856 | if (area->ip_circuits > 0 || area->ipv6_circuits > 0) { | |
af8ac8f9 | 857 | struct nlpids nlpids = {.count = 0}; |
d62a17ae | 858 | if (area->ip_circuits > 0) { |
859 | lsp_debug( | |
860 | "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs", | |
861 | area->area_tag); | |
af8ac8f9 CF |
862 | nlpids.nlpids[nlpids.count] = NLPID_IP; |
863 | nlpids.count++; | |
d62a17ae | 864 | } |
865 | if (area->ipv6_circuits > 0) { | |
866 | lsp_debug( | |
867 | "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs", | |
868 | area->area_tag); | |
af8ac8f9 CF |
869 | nlpids.nlpids[nlpids.count] = NLPID_IPV6; |
870 | nlpids.count++; | |
d62a17ae | 871 | } |
af8ac8f9 | 872 | isis_tlvs_set_protocols_supported(lsp->tlvs, &nlpids); |
d62a17ae | 873 | } |
874 | ||
875 | if (area_is_mt(area)) { | |
876 | lsp_debug("ISIS (%s): Adding MT router tlv...", area->area_tag); | |
d62a17ae | 877 | |
878 | struct isis_area_mt_setting **mt_settings; | |
879 | unsigned int mt_count; | |
880 | ||
881 | mt_settings = area_mt_settings(area, &mt_count); | |
882 | for (unsigned int i = 0; i < mt_count; i++) { | |
af8ac8f9 CF |
883 | isis_tlvs_add_mt_router_info( |
884 | lsp->tlvs, mt_settings[i]->mtid, | |
885 | mt_settings[i]->overload, false); | |
d62a17ae | 886 | lsp_debug("ISIS (%s): MT %s", area->area_tag, |
af8ac8f9 | 887 | isis_mtid2str(mt_settings[i]->mtid)); |
aa4376ec | 888 | } |
d62a17ae | 889 | } else { |
890 | lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)", | |
891 | area->area_tag); | |
892 | } | |
893 | /* Dynamic Hostname */ | |
894 | if (area->dynhostname) { | |
6b3ee3a0 | 895 | isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get()); |
af8ac8f9 | 896 | lsp_debug("ISIS (%s): Adding dynamic hostname '%s'", |
6b3ee3a0 | 897 | area->area_tag, cmd_hostname_get()); |
d62a17ae | 898 | } else { |
899 | lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)", | |
900 | area->area_tag); | |
901 | } | |
902 | ||
903 | /* IPv4 address and TE router ID TLVs. In case of the first one we don't | |
904 | * follow "C" vendor, but "J" vendor behavior - one IPv4 address is put | |
905 | * into | |
906 | * LSP and this address is same as router id. */ | |
907 | if (isis->router_id != 0) { | |
af8ac8f9 CF |
908 | struct in_addr id = {.s_addr = isis->router_id}; |
909 | inet_ntop(AF_INET, &id, buf, sizeof(buf)); | |
d62a17ae | 910 | lsp_debug("ISIS (%s): Adding router ID %s as IPv4 tlv.", |
911 | area->area_tag, buf); | |
af8ac8f9 | 912 | isis_tlvs_add_ipv4_address(lsp->tlvs, &id); |
d62a17ae | 913 | |
914 | /* Exactly same data is put into TE router ID TLV, but only if | |
915 | * new style | |
916 | * TLV's are in use. */ | |
917 | if (area->newmetric) { | |
af8ac8f9 | 918 | |
d62a17ae | 919 | lsp_debug( |
920 | "ISIS (%s): Adding router ID also as TE router ID tlv.", | |
921 | area->area_tag); | |
af8ac8f9 | 922 | isis_tlvs_set_te_router_id(lsp->tlvs, &id); |
aa4376ec | 923 | } |
d62a17ae | 924 | } else { |
925 | lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.", | |
926 | area->area_tag); | |
927 | } | |
928 | ||
d62a17ae | 929 | lsp_debug("ISIS (%s): Adding circuit specific information.", |
930 | area->area_tag); | |
931 | ||
92ed0cde CF |
932 | if (fabricd) { |
933 | lsp_debug( | |
934 | "ISIS (%s): Adding tier %" PRIu8 " spine-leaf-extension tlv.", | |
935 | area->area_tag, fabricd_tier(area)); | |
936 | isis_tlvs_add_spine_leaf(lsp->tlvs, fabricd_tier(area), true, | |
937 | false, false, false); | |
938 | } | |
939 | ||
af8ac8f9 | 940 | struct isis_circuit *circuit; |
d62a17ae | 941 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit)) { |
942 | if (!circuit->interface) | |
943 | lsp_debug( | |
944 | "ISIS (%s): Processing %s circuit %p with unknown interface", | |
945 | area->area_tag, | |
946 | circuit_type2string(circuit->circ_type), | |
947 | circuit); | |
948 | else | |
949 | lsp_debug("ISIS (%s): Processing %s circuit %s", | |
950 | area->area_tag, | |
951 | circuit_type2string(circuit->circ_type), | |
952 | circuit->interface->name); | |
953 | ||
954 | if (circuit->state != C_STATE_UP) { | |
955 | lsp_debug("ISIS (%s): Circuit is not up, ignoring.", | |
956 | area->area_tag); | |
957 | continue; | |
aa4376ec | 958 | } |
d62a17ae | 959 | |
af8ac8f9 CF |
960 | uint32_t metric = area->oldmetric |
961 | ? circuit->metric[level - 1] | |
962 | : circuit->te_metric[level - 1]; | |
963 | ||
d62a17ae | 964 | if (circuit->ip_router && circuit->ip_addrs |
965 | && circuit->ip_addrs->count > 0) { | |
966 | lsp_debug( | |
967 | "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.", | |
968 | area->area_tag); | |
af8ac8f9 CF |
969 | struct listnode *ipnode; |
970 | struct prefix_ipv4 *ipv4; | |
971 | for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, ipnode, | |
972 | ipv4)) { | |
973 | if (area->oldmetric) { | |
d62a17ae | 974 | lsp_debug( |
af8ac8f9 CF |
975 | "ISIS (%s): Adding old-style IP reachability for %s", |
976 | area->area_tag, | |
977 | prefix2str(ipv4, buf, | |
978 | sizeof(buf))); | |
979 | isis_tlvs_add_oldstyle_ip_reach( | |
980 | lsp->tlvs, ipv4, metric); | |
d62a17ae | 981 | } |
af8ac8f9 CF |
982 | |
983 | if (area->newmetric) { | |
d62a17ae | 984 | lsp_debug( |
af8ac8f9 CF |
985 | "ISIS (%s): Adding te-style IP reachability for %s", |
986 | area->area_tag, | |
987 | prefix2str(ipv4, buf, | |
988 | sizeof(buf))); | |
989 | isis_tlvs_add_extended_ip_reach( | |
990 | lsp->tlvs, ipv4, metric); | |
d62a17ae | 991 | } |
992 | } | |
f390d2c7 | 993 | } |
d62a17ae | 994 | |
d62a17ae | 995 | if (circuit->ipv6_router && circuit->ipv6_non_link |
996 | && circuit->ipv6_non_link->count > 0) { | |
af8ac8f9 CF |
997 | struct listnode *ipnode; |
998 | struct prefix_ipv6 *ipv6; | |
d62a17ae | 999 | for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, |
1000 | ipnode, ipv6)) { | |
d62a17ae | 1001 | lsp_debug( |
af8ac8f9 CF |
1002 | "ISIS (%s): Adding IPv6 reachability for %s", |
1003 | area->area_tag, | |
1004 | prefix2str(ipv6, buf, sizeof(buf))); | |
1005 | isis_tlvs_add_ipv6_reach( | |
1006 | lsp->tlvs, | |
1007 | isis_area_ipv6_topology(area), ipv6, | |
1008 | metric); | |
d62a17ae | 1009 | } |
aa4376ec | 1010 | } |
d62a17ae | 1011 | |
1012 | switch (circuit->circ_type) { | |
1013 | case CIRCUIT_T_BROADCAST: | |
1014 | if (level & circuit->is_type) { | |
af8ac8f9 CF |
1015 | uint8_t *ne_id = |
1016 | (level == IS_LEVEL_1) | |
1017 | ? circuit->u.bc.l1_desig_is | |
1018 | : circuit->u.bc.l2_desig_is; | |
1019 | ||
1020 | if (LSP_PSEUDO_ID(ne_id)) { | |
1021 | if (area->oldmetric) { | |
d62a17ae | 1022 | lsp_debug( |
1023 | "ISIS (%s): Adding DIS %s.%02x as old-style neighbor", | |
1024 | area->area_tag, | |
af8ac8f9 CF |
1025 | sysid_print(ne_id), |
1026 | LSP_PSEUDO_ID(ne_id)); | |
1027 | isis_tlvs_add_oldstyle_reach( | |
1028 | lsp->tlvs, ne_id, | |
1029 | metric); | |
d62a17ae | 1030 | } |
af8ac8f9 CF |
1031 | if (area->newmetric) { |
1032 | uint8_t subtlvs[256]; | |
1033 | uint8_t subtlv_len; | |
1034 | ||
d62a17ae | 1035 | if (IS_MPLS_TE(isisMplsTE) |
1036 | && HAS_LINK_PARAMS( | |
1037 | circuit->interface)) | |
af8ac8f9 CF |
1038 | subtlv_len = add_te_subtlvs( |
1039 | subtlvs, | |
d62a17ae | 1040 | circuit->mtc); |
1041 | else | |
af8ac8f9 | 1042 | subtlv_len = 0; |
d62a17ae | 1043 | |
1044 | tlvs_add_mt_bcast( | |
af8ac8f9 CF |
1045 | lsp->tlvs, circuit, |
1046 | level, ne_id, metric, | |
1047 | subtlvs, subtlv_len); | |
d62a17ae | 1048 | } |
1049 | } | |
1050 | } else { | |
1051 | lsp_debug( | |
1052 | "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors", | |
1053 | area->area_tag); | |
1054 | } | |
1055 | break; | |
af8ac8f9 CF |
1056 | case CIRCUIT_T_P2P: { |
1057 | struct isis_adjacency *nei = circuit->u.p2p.neighbor; | |
44b89511 CF |
1058 | if (nei && nei->adj_state == ISIS_ADJ_UP |
1059 | && (level & nei->circuit_t)) { | |
af8ac8f9 CF |
1060 | uint8_t ne_id[7]; |
1061 | memcpy(ne_id, nei->sysid, ISIS_SYS_ID_LEN); | |
1062 | LSP_PSEUDO_ID(ne_id) = 0; | |
1063 | ||
d62a17ae | 1064 | if (area->oldmetric) { |
d62a17ae | 1065 | lsp_debug( |
1066 | "ISIS (%s): Adding old-style is reach for %s", | |
1067 | area->area_tag, | |
af8ac8f9 CF |
1068 | sysid_print(ne_id)); |
1069 | isis_tlvs_add_oldstyle_reach( | |
1070 | lsp->tlvs, ne_id, metric); | |
d62a17ae | 1071 | } |
1072 | if (area->newmetric) { | |
af8ac8f9 CF |
1073 | uint8_t subtlvs[256]; |
1074 | uint8_t subtlv_len; | |
d62a17ae | 1075 | |
d62a17ae | 1076 | if (IS_MPLS_TE(isisMplsTE) |
c46df787 | 1077 | && circuit->interface != NULL |
d62a17ae | 1078 | && HAS_LINK_PARAMS( |
1079 | circuit->interface)) | |
1080 | /* Update Local and Remote IP | |
1081 | * address for MPLS TE circuit | |
1082 | * parameters */ | |
1083 | /* NOTE sure that it is the | |
1084 | * pertinent place for that | |
1085 | * updates */ | |
1086 | /* Local IP address could be | |
1087 | * updated in isis_circuit.c - | |
1088 | * isis_circuit_add_addr() */ | |
1089 | /* But, where update remote IP | |
1090 | * address ? in isis_pdu.c - | |
1091 | * process_p2p_hello() ? */ | |
1092 | ||
1093 | /* Add SubTLVs & Adjust real | |
1094 | * size of SubTLVs */ | |
af8ac8f9 CF |
1095 | subtlv_len = add_te_subtlvs( |
1096 | subtlvs, circuit->mtc); | |
d62a17ae | 1097 | else |
1098 | /* Or keep only TE metric with | |
1099 | * no SubTLVs if MPLS_TE is off | |
1100 | */ | |
af8ac8f9 | 1101 | subtlv_len = 0; |
d62a17ae | 1102 | |
a191178d CF |
1103 | uint32_t neighbor_metric; |
1104 | if (fabricd_tier(area) == 0) { | |
1105 | neighbor_metric = 0xffe; | |
1106 | } else { | |
1107 | neighbor_metric = metric; | |
1108 | } | |
1109 | ||
af8ac8f9 | 1110 | tlvs_add_mt_p2p(lsp->tlvs, circuit, |
a191178d CF |
1111 | ne_id, neighbor_metric, |
1112 | subtlvs, subtlv_len); | |
d62a17ae | 1113 | } |
1114 | } else { | |
1115 | lsp_debug( | |
1116 | "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors", | |
1117 | area->area_tag); | |
1118 | } | |
af8ac8f9 | 1119 | } break; |
d62a17ae | 1120 | case CIRCUIT_T_LOOPBACK: |
1121 | break; | |
1122 | default: | |
1123 | zlog_warn("lsp_area_create: unknown circuit type"); | |
aa4376ec | 1124 | } |
d62a17ae | 1125 | } |
1126 | ||
af8ac8f9 | 1127 | lsp_build_ext_reach(lsp, area); |
d62a17ae | 1128 | |
af8ac8f9 CF |
1129 | struct isis_tlvs *tlvs = lsp->tlvs; |
1130 | lsp->tlvs = NULL; | |
d62a17ae | 1131 | |
af8ac8f9 CF |
1132 | lsp_pack_pdu(lsp); |
1133 | size_t tlv_space = STREAM_WRITEABLE(lsp->pdu) - LLC_LEN; | |
1134 | lsp_clear_data(lsp); | |
d62a17ae | 1135 | |
af8ac8f9 CF |
1136 | struct list *fragments = isis_fragment_tlvs(tlvs, tlv_space); |
1137 | if (!fragments) { | |
1138 | zlog_warn("BUG: could not fragment own LSP:"); | |
996c9314 LB |
1139 | log_multiline(LOG_WARNING, " ", "%s", |
1140 | isis_format_tlvs(tlvs)); | |
af8ac8f9 CF |
1141 | isis_free_tlvs(tlvs); |
1142 | return; | |
d62a17ae | 1143 | } |
af8ac8f9 | 1144 | isis_free_tlvs(tlvs); |
d62a17ae | 1145 | |
789c4dfc | 1146 | bool fragment_overflow = false; |
af8ac8f9 CF |
1147 | frag = lsp; |
1148 | for (ALL_LIST_ELEMENTS_RO(fragments, node, tlvs)) { | |
1149 | if (node != listhead(fragments)) { | |
789c4dfc CF |
1150 | if (LSP_FRAGMENT(frag->hdr.lsp_id) == 255) { |
1151 | if (!fragment_overflow) { | |
1152 | fragment_overflow = true; | |
996c9314 LB |
1153 | zlog_warn( |
1154 | "ISIS (%s): Too much information for 256 fragments", | |
1155 | area->area_tag); | |
789c4dfc CF |
1156 | } |
1157 | isis_free_tlvs(tlvs); | |
1158 | continue; | |
1159 | } | |
1160 | ||
af8ac8f9 CF |
1161 | frag = lsp_next_frag(LSP_FRAGMENT(frag->hdr.lsp_id) + 1, |
1162 | lsp, area, level); | |
d62a17ae | 1163 | } |
af8ac8f9 | 1164 | frag->tlvs = tlvs; |
d62a17ae | 1165 | } |
1166 | ||
affe9e99 | 1167 | list_delete_and_null(&fragments); |
af8ac8f9 CF |
1168 | lsp_debug("ISIS (%s): LSP construction is complete. Serializing...", |
1169 | area->area_tag); | |
d62a17ae | 1170 | return; |
eb5d44eb | 1171 | } |
eb5d44eb | 1172 | |
1173 | /* | |
3f045a08 | 1174 | * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs |
eb5d44eb | 1175 | */ |
d62a17ae | 1176 | int lsp_generate(struct isis_area *area, int level) |
f390d2c7 | 1177 | { |
d62a17ae | 1178 | struct isis_lsp *oldlsp, *newlsp; |
d7c0a89a QY |
1179 | uint32_t seq_num = 0; |
1180 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1181 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1182 | |
1183 | if ((area == NULL) || (area->is_type & level) != level) | |
1184 | return ISIS_ERROR; | |
1185 | ||
1186 | memset(&lspid, 0, ISIS_SYS_ID_LEN + 2); | |
1187 | memcpy(&lspid, isis->sysid, ISIS_SYS_ID_LEN); | |
1188 | ||
1189 | /* only builds the lsp if the area shares the level */ | |
1190 | oldlsp = lsp_search(lspid, area->lspdb[level - 1]); | |
1191 | if (oldlsp) { | |
1192 | /* FIXME: we should actually initiate a purge */ | |
af8ac8f9 CF |
1193 | seq_num = oldlsp->hdr.seqno; |
1194 | lsp_search_and_destroy(oldlsp->hdr.lsp_id, | |
d62a17ae | 1195 | area->lspdb[level - 1]); |
1196 | } | |
1197 | rem_lifetime = lsp_rem_lifetime(area, level); | |
1198 | newlsp = | |
1199 | lsp_new(area, lspid, rem_lifetime, seq_num, | |
1200 | area->is_type | area->overload_bit | area->attached_bit, | |
8f5dbe18 | 1201 | 0, NULL, level); |
d62a17ae | 1202 | newlsp->area = area; |
1203 | newlsp->own_lsp = 1; | |
1204 | ||
1205 | lsp_insert(newlsp, area->lspdb[level - 1]); | |
1206 | /* build_lsp_data (newlsp, area); */ | |
1207 | lsp_build(newlsp, area); | |
1208 | /* time to calculate our checksum */ | |
af8ac8f9 | 1209 | lsp_seqno_update(newlsp); |
d62a17ae | 1210 | newlsp->last_generated = time(NULL); |
9b39405f | 1211 | lsp_flood(newlsp, NULL); |
d62a17ae | 1212 | |
1213 | refresh_time = lsp_refresh_time(newlsp, rem_lifetime); | |
1214 | ||
1215 | THREAD_TIMER_OFF(area->t_lsp_refresh[level - 1]); | |
1216 | area->lsp_regenerate_pending[level - 1] = 0; | |
1217 | if (level == IS_LEVEL_1) | |
1218 | thread_add_timer(master, lsp_l1_refresh, area, refresh_time, | |
1219 | &area->t_lsp_refresh[level - 1]); | |
1220 | else if (level == IS_LEVEL_2) | |
1221 | thread_add_timer(master, lsp_l2_refresh, area, refresh_time, | |
1222 | &area->t_lsp_refresh[level - 1]); | |
1223 | ||
1224 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
af8ac8f9 CF |
1225 | zlog_debug("ISIS-Upd (%s): Building L%d LSP %s, len %" PRIu16 |
1226 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1227 | ", lifetime %" PRIu16 "s refresh %" PRIu16 "s", | |
1228 | area->area_tag, level, | |
1229 | rawlspid_print(newlsp->hdr.lsp_id), | |
1230 | newlsp->hdr.pdu_len, newlsp->hdr.seqno, | |
1231 | newlsp->hdr.checksum, newlsp->hdr.rem_lifetime, | |
1232 | refresh_time); | |
d62a17ae | 1233 | } |
1234 | sched_debug( | |
1235 | "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.", | |
1236 | area->area_tag, level); | |
1237 | ||
1238 | return ISIS_OK; | |
eb5d44eb | 1239 | } |
1240 | ||
1241 | /* | |
9b39405f | 1242 | * Search own LSPs, update holding time and flood |
eb5d44eb | 1243 | */ |
d62a17ae | 1244 | static int lsp_regenerate(struct isis_area *area, int level) |
eb5d44eb | 1245 | { |
d62a17ae | 1246 | dict_t *lspdb; |
1247 | struct isis_lsp *lsp, *frag; | |
1248 | struct listnode *node; | |
d7c0a89a QY |
1249 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; |
1250 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1251 | |
1252 | if ((area == NULL) || (area->is_type & level) != level) | |
1253 | return ISIS_ERROR; | |
1254 | ||
1255 | lspdb = area->lspdb[level - 1]; | |
1256 | ||
1257 | memset(lspid, 0, ISIS_SYS_ID_LEN + 2); | |
1258 | memcpy(lspid, isis->sysid, ISIS_SYS_ID_LEN); | |
1259 | ||
1260 | lsp = lsp_search(lspid, lspdb); | |
1261 | ||
1262 | if (!lsp) { | |
af4c2728 | 1263 | flog_err(LIB_ERR_DEVELOPMENT, |
54ece698 DS |
1264 | "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!", |
1265 | area->area_tag, level); | |
d62a17ae | 1266 | return ISIS_ERROR; |
1267 | } | |
1268 | ||
1269 | lsp_clear_data(lsp); | |
1270 | lsp_build(lsp, area); | |
d62a17ae | 1271 | rem_lifetime = lsp_rem_lifetime(area, level); |
af8ac8f9 | 1272 | lsp->hdr.rem_lifetime = rem_lifetime; |
d62a17ae | 1273 | lsp->last_generated = time(NULL); |
9b39405f | 1274 | lsp_flood(lsp, NULL); |
d62a17ae | 1275 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { |
af8ac8f9 | 1276 | frag->hdr.lsp_bits = lsp_bits_generate( |
d62a17ae | 1277 | level, area->overload_bit, area->attached_bit); |
1278 | /* Set the lifetime values of all the fragments to the same | |
1279 | * value, | |
1280 | * so that no fragment expires before the lsp is refreshed. | |
1281 | */ | |
af8ac8f9 | 1282 | frag->hdr.rem_lifetime = rem_lifetime; |
0b8b6cab | 1283 | frag->age_out = ZERO_AGE_LIFETIME; |
9b39405f | 1284 | lsp_flood(frag, NULL); |
d62a17ae | 1285 | } |
af8ac8f9 | 1286 | lsp_seqno_update(lsp); |
d62a17ae | 1287 | |
1288 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1289 | if (level == IS_LEVEL_1) | |
1290 | thread_add_timer(master, lsp_l1_refresh, area, refresh_time, | |
1291 | &area->t_lsp_refresh[level - 1]); | |
1292 | else if (level == IS_LEVEL_2) | |
1293 | thread_add_timer(master, lsp_l2_refresh, area, refresh_time, | |
1294 | &area->t_lsp_refresh[level - 1]); | |
1295 | area->lsp_regenerate_pending[level - 1] = 0; | |
1296 | ||
1297 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1298 | zlog_debug( | |
af8ac8f9 CF |
1299 | "ISIS-Upd (%s): Refreshed our L%d LSP %s, len %" PRIu16 |
1300 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1301 | ", lifetime %" PRIu16 "s refresh %" PRIu16 "s", | |
1302 | area->area_tag, level, rawlspid_print(lsp->hdr.lsp_id), | |
1303 | lsp->hdr.pdu_len, lsp->hdr.seqno, lsp->hdr.checksum, | |
1304 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1305 | } |
1306 | sched_debug( | |
1307 | "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.", | |
1308 | area->area_tag, level); | |
1309 | ||
1310 | return ISIS_OK; | |
eb5d44eb | 1311 | } |
1312 | ||
eb5d44eb | 1313 | /* |
3f045a08 | 1314 | * Something has changed or periodic refresh -> regenerate LSP |
eb5d44eb | 1315 | */ |
d62a17ae | 1316 | static int lsp_l1_refresh(struct thread *thread) |
eb5d44eb | 1317 | { |
d62a17ae | 1318 | struct isis_area *area; |
eb5d44eb | 1319 | |
d62a17ae | 1320 | area = THREAD_ARG(thread); |
1321 | assert(area); | |
f390d2c7 | 1322 | |
d62a17ae | 1323 | area->t_lsp_refresh[0] = NULL; |
1324 | area->lsp_regenerate_pending[0] = 0; | |
eb5d44eb | 1325 | |
d62a17ae | 1326 | if ((area->is_type & IS_LEVEL_1) == 0) |
1327 | return ISIS_ERROR; | |
d70f99e1 | 1328 | |
d62a17ae | 1329 | sched_debug( |
1330 | "ISIS (%s): LSP L1 refresh timer expired. Refreshing LSP...", | |
1331 | area->area_tag); | |
1332 | return lsp_regenerate(area, IS_LEVEL_1); | |
eb5d44eb | 1333 | } |
1334 | ||
d62a17ae | 1335 | static int lsp_l2_refresh(struct thread *thread) |
eb5d44eb | 1336 | { |
d62a17ae | 1337 | struct isis_area *area; |
eb5d44eb | 1338 | |
d62a17ae | 1339 | area = THREAD_ARG(thread); |
1340 | assert(area); | |
f390d2c7 | 1341 | |
d62a17ae | 1342 | area->t_lsp_refresh[1] = NULL; |
1343 | area->lsp_regenerate_pending[1] = 0; | |
f390d2c7 | 1344 | |
d62a17ae | 1345 | if ((area->is_type & IS_LEVEL_2) == 0) |
1346 | return ISIS_ERROR; | |
3f045a08 | 1347 | |
d62a17ae | 1348 | sched_debug( |
1349 | "ISIS (%s): LSP L2 refresh timer expired. Refreshing LSP...", | |
1350 | area->area_tag); | |
1351 | return lsp_regenerate(area, IS_LEVEL_2); | |
eb5d44eb | 1352 | } |
1353 | ||
d62a17ae | 1354 | int lsp_regenerate_schedule(struct isis_area *area, int level, int all_pseudo) |
eb5d44eb | 1355 | { |
d62a17ae | 1356 | struct isis_lsp *lsp; |
d7c0a89a | 1357 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1358 | time_t now, diff; |
1359 | long timeout; | |
1360 | struct listnode *cnode; | |
1361 | struct isis_circuit *circuit; | |
1362 | int lvl; | |
1363 | ||
1364 | if (area == NULL) | |
1365 | return ISIS_ERROR; | |
1366 | ||
1367 | sched_debug( | |
1368 | "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs", | |
1369 | area->area_tag, circuit_t2string(level), | |
1370 | all_pseudo ? "" : "not "); | |
1371 | ||
1372 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1373 | LSP_PSEUDO_ID(id) = LSP_FRAGMENT(id) = 0; | |
1374 | now = time(NULL); | |
1375 | ||
1376 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1377 | if (!((level & lvl) && (area->is_type & lvl))) | |
1378 | continue; | |
1379 | ||
1380 | sched_debug( | |
1381 | "ISIS (%s): Checking whether L%d needs to be scheduled", | |
1382 | area->area_tag, lvl); | |
1383 | ||
1384 | if (area->lsp_regenerate_pending[lvl - 1]) { | |
1385 | struct timeval remain = thread_timer_remain( | |
1386 | area->t_lsp_refresh[lvl - 1]); | |
1387 | sched_debug( | |
1388 | "ISIS (%s): Regeneration is already pending, nothing todo." | |
1389 | " (Due in %lld.%03lld seconds)", | |
1390 | area->area_tag, (long long)remain.tv_sec, | |
1391 | (long long)remain.tv_usec / 1000); | |
1392 | continue; | |
1393 | } | |
1394 | ||
1395 | lsp = lsp_search(id, area->lspdb[lvl - 1]); | |
1396 | if (!lsp) { | |
1397 | sched_debug( | |
1398 | "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.", | |
1399 | area->area_tag); | |
1400 | continue; | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | * Throttle avoidance | |
1405 | */ | |
1406 | sched_debug( | |
1407 | "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld", | |
1408 | area->area_tag, (long long)lsp->last_generated, | |
1409 | (long long)now); | |
1410 | THREAD_TIMER_OFF(area->t_lsp_refresh[lvl - 1]); | |
1411 | diff = now - lsp->last_generated; | |
1412 | if (diff < area->lsp_gen_interval[lvl - 1]) { | |
1413 | timeout = | |
1414 | 1000 * (area->lsp_gen_interval[lvl - 1] - diff); | |
1415 | sched_debug( | |
1416 | "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval", | |
1417 | area->area_tag, timeout); | |
1418 | } else { | |
1419 | /* | |
1420 | * lsps are not regenerated if lsp_regenerate function | |
1421 | * is called | |
1422 | * directly. However if the lsp_regenerate call is | |
1423 | * queued for | |
1424 | * later execution it works. | |
1425 | */ | |
1426 | timeout = 100; | |
1427 | sched_debug( | |
1428 | "ISIS (%s): Last generation was more than lsp_gen_interval ago." | |
1429 | " Scheduling for execution in %ld ms.", | |
1430 | area->area_tag, timeout); | |
1431 | } | |
1432 | ||
1433 | area->lsp_regenerate_pending[lvl - 1] = 1; | |
1434 | if (lvl == IS_LEVEL_1) { | |
1435 | thread_add_timer_msec(master, lsp_l1_refresh, area, | |
1436 | timeout, | |
1437 | &area->t_lsp_refresh[lvl - 1]); | |
1438 | } else if (lvl == IS_LEVEL_2) { | |
1439 | thread_add_timer_msec(master, lsp_l2_refresh, area, | |
1440 | timeout, | |
1441 | &area->t_lsp_refresh[lvl - 1]); | |
1442 | } | |
1443 | } | |
1444 | ||
1445 | if (all_pseudo) { | |
1446 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, cnode, circuit)) | |
1447 | lsp_regenerate_schedule_pseudo(circuit, level); | |
1448 | } | |
1449 | ||
1450 | return ISIS_OK; | |
eb5d44eb | 1451 | } |
1452 | ||
1453 | /* | |
1454 | * Funcs for pseudonode LSPs | |
1455 | */ | |
1456 | ||
1457 | /* | |
d62a17ae | 1458 | * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs |
eb5d44eb | 1459 | */ |
d62a17ae | 1460 | static void lsp_build_pseudo(struct isis_lsp *lsp, struct isis_circuit *circuit, |
1461 | int level) | |
eb5d44eb | 1462 | { |
d62a17ae | 1463 | struct isis_adjacency *adj; |
d62a17ae | 1464 | struct list *adj_list; |
1465 | struct listnode *node; | |
1466 | struct isis_area *area = circuit->area; | |
1467 | ||
af8ac8f9 CF |
1468 | lsp_clear_data(lsp); |
1469 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 1470 | lsp_debug( |
1471 | "ISIS (%s): Constructing pseudo LSP %s for interface %s level %d", | |
af8ac8f9 | 1472 | area->area_tag, rawlspid_print(lsp->hdr.lsp_id), |
d62a17ae | 1473 | circuit->interface->name, level); |
1474 | ||
1475 | lsp->level = level; | |
1476 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
af8ac8f9 | 1477 | lsp->hdr.lsp_bits = |
d62a17ae | 1478 | lsp_bits_generate(level, 0, circuit->area->attached_bit); |
1479 | ||
1480 | /* | |
1481 | * add self to IS neighbours | |
1482 | */ | |
af8ac8f9 CF |
1483 | uint8_t ne_id[ISIS_SYS_ID_LEN + 1]; |
1484 | ||
1485 | memcpy(ne_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1486 | LSP_PSEUDO_ID(ne_id) = 0; | |
d62a17ae | 1487 | |
af8ac8f9 CF |
1488 | if (circuit->area->oldmetric) { |
1489 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
d62a17ae | 1490 | lsp_debug( |
1491 | "ISIS (%s): Adding %s.%02x as old-style neighbor (self)", | |
af8ac8f9 CF |
1492 | area->area_tag, sysid_print(ne_id), |
1493 | LSP_PSEUDO_ID(ne_id)); | |
d62a17ae | 1494 | } |
1495 | if (circuit->area->newmetric) { | |
af8ac8f9 CF |
1496 | isis_tlvs_add_extended_reach(lsp->tlvs, ISIS_MT_IPV4_UNICAST, |
1497 | ne_id, 0, NULL, 0); | |
d62a17ae | 1498 | lsp_debug( |
1499 | "ISIS (%s): Adding %s.%02x as te-style neighbor (self)", | |
af8ac8f9 CF |
1500 | area->area_tag, sysid_print(ne_id), |
1501 | LSP_PSEUDO_ID(ne_id)); | |
d62a17ae | 1502 | } |
1503 | ||
1504 | adj_list = list_new(); | |
1505 | isis_adj_build_up_list(circuit->u.bc.adjdb[level - 1], adj_list); | |
1506 | ||
1507 | for (ALL_LIST_ELEMENTS_RO(adj_list, node, adj)) { | |
af8ac8f9 | 1508 | if (!(adj->level & level)) { |
d62a17ae | 1509 | lsp_debug( |
1510 | "ISIS (%s): Ignoring neighbor %s, level does not intersect", | |
1511 | area->area_tag, sysid_print(adj->sysid)); | |
af8ac8f9 | 1512 | continue; |
f390d2c7 | 1513 | } |
d62a17ae | 1514 | |
af8ac8f9 CF |
1515 | if (!(level == IS_LEVEL_1 |
1516 | && adj->sys_type == ISIS_SYSTYPE_L1_IS) | |
1517 | && !(level == IS_LEVEL_1 | |
1518 | && adj->sys_type == ISIS_SYSTYPE_L2_IS | |
1519 | && adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
1520 | && !(level == IS_LEVEL_2 | |
1521 | && adj->sys_type == ISIS_SYSTYPE_L2_IS)) { | |
1522 | lsp_debug( | |
1523 | "ISIS (%s): Ignoring neighbor %s, level does not match", | |
1524 | area->area_tag, sysid_print(adj->sysid)); | |
1525 | continue; | |
1526 | } | |
d62a17ae | 1527 | |
af8ac8f9 CF |
1528 | memcpy(ne_id, adj->sysid, ISIS_SYS_ID_LEN); |
1529 | if (circuit->area->oldmetric) { | |
1530 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
1531 | lsp_debug( | |
1532 | "ISIS (%s): Adding %s.%02x as old-style neighbor (peer)", | |
1533 | area->area_tag, sysid_print(ne_id), | |
1534 | LSP_PSEUDO_ID(ne_id)); | |
1535 | } | |
1536 | if (circuit->area->newmetric) { | |
1537 | isis_tlvs_add_extended_reach(lsp->tlvs, | |
1538 | ISIS_MT_IPV4_UNICAST, | |
1539 | ne_id, 0, NULL, 0); | |
1540 | lsp_debug( | |
1541 | "ISIS (%s): Adding %s.%02x as te-style neighbor (peer)", | |
1542 | area->area_tag, sysid_print(ne_id), | |
1543 | LSP_PSEUDO_ID(ne_id)); | |
1544 | } | |
1545 | } | |
affe9e99 | 1546 | list_delete_and_null(&adj_list); |
d62a17ae | 1547 | return; |
eb5d44eb | 1548 | } |
1549 | ||
d62a17ae | 1550 | int lsp_generate_pseudo(struct isis_circuit *circuit, int level) |
3f045a08 | 1551 | { |
d62a17ae | 1552 | dict_t *lspdb = circuit->area->lspdb[level - 1]; |
1553 | struct isis_lsp *lsp; | |
d7c0a89a QY |
1554 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
1555 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1556 | |
1557 | if ((circuit->is_type & level) != level | |
1558 | || (circuit->state != C_STATE_UP) | |
1559 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1560 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1561 | return ISIS_ERROR; | |
1562 | ||
1563 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1564 | LSP_FRAGMENT(lsp_id) = 0; | |
1565 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1566 | ||
1567 | /* | |
1568 | * If for some reason have a pseudo LSP in the db already -> regenerate | |
1569 | */ | |
1570 | if (lsp_search(lsp_id, lspdb)) | |
1571 | return lsp_regenerate_schedule_pseudo(circuit, level); | |
1572 | ||
1573 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); | |
1574 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
1575 | lsp = lsp_new(circuit->area, lsp_id, rem_lifetime, 1, | |
1576 | circuit->area->is_type | circuit->area->attached_bit, 0, | |
8f5dbe18 | 1577 | NULL, level); |
d62a17ae | 1578 | lsp->area = circuit->area; |
1579 | ||
1580 | lsp_build_pseudo(lsp, circuit, level); | |
af8ac8f9 | 1581 | lsp_pack_pdu(lsp); |
d62a17ae | 1582 | lsp->own_lsp = 1; |
1583 | lsp_insert(lsp, lspdb); | |
9b39405f | 1584 | lsp_flood(lsp, NULL); |
d62a17ae | 1585 | |
1586 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1587 | THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1588 | circuit->lsp_regenerate_pending[level - 1] = 0; | |
1589 | if (level == IS_LEVEL_1) | |
1590 | thread_add_timer( | |
1591 | master, lsp_l1_refresh_pseudo, circuit, refresh_time, | |
1592 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1593 | else if (level == IS_LEVEL_2) | |
1594 | thread_add_timer( | |
1595 | master, lsp_l2_refresh_pseudo, circuit, refresh_time, | |
1596 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1597 | ||
1598 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1599 | zlog_debug( | |
af8ac8f9 CF |
1600 | "ISIS-Upd (%s): Built L%d Pseudo LSP %s, len %" PRIu16 |
1601 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1602 | ", lifetime %" PRIu16 "s, refresh %" PRIu16 "s", | |
d62a17ae | 1603 | circuit->area->area_tag, level, |
af8ac8f9 CF |
1604 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len, |
1605 | lsp->hdr.seqno, lsp->hdr.checksum, | |
1606 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1607 | } |
1608 | ||
1609 | return ISIS_OK; | |
3f045a08 JB |
1610 | } |
1611 | ||
d62a17ae | 1612 | static int lsp_regenerate_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1613 | { |
d62a17ae | 1614 | dict_t *lspdb = circuit->area->lspdb[level - 1]; |
1615 | struct isis_lsp *lsp; | |
d7c0a89a QY |
1616 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
1617 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1618 | |
1619 | if ((circuit->is_type & level) != level | |
1620 | || (circuit->state != C_STATE_UP) | |
1621 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1622 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1623 | return ISIS_ERROR; | |
1624 | ||
1625 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1626 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1627 | LSP_FRAGMENT(lsp_id) = 0; | |
1628 | ||
1629 | lsp = lsp_search(lsp_id, lspdb); | |
1630 | ||
1631 | if (!lsp) { | |
af4c2728 | 1632 | flog_err(LIB_ERR_DEVELOPMENT, |
54ece698 DS |
1633 | "lsp_regenerate_pseudo: no l%d LSP %s found!", level, |
1634 | rawlspid_print(lsp_id)); | |
d62a17ae | 1635 | return ISIS_ERROR; |
1636 | } | |
d62a17ae | 1637 | |
d62a17ae | 1638 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); |
af8ac8f9 CF |
1639 | lsp->hdr.rem_lifetime = rem_lifetime; |
1640 | lsp_build_pseudo(lsp, circuit, level); | |
1641 | lsp_inc_seqno(lsp, 0); | |
d62a17ae | 1642 | lsp->last_generated = time(NULL); |
9b39405f | 1643 | lsp_flood(lsp, NULL); |
d62a17ae | 1644 | |
1645 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1646 | if (level == IS_LEVEL_1) | |
1647 | thread_add_timer( | |
1648 | master, lsp_l1_refresh_pseudo, circuit, refresh_time, | |
1649 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1650 | else if (level == IS_LEVEL_2) | |
1651 | thread_add_timer( | |
1652 | master, lsp_l2_refresh_pseudo, circuit, refresh_time, | |
1653 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1654 | ||
1655 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1656 | zlog_debug( | |
af8ac8f9 CF |
1657 | "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %s, len %" PRIu16 |
1658 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1659 | ", lifetime %" PRIu16 "s, refresh %" PRIu16 "s", | |
d62a17ae | 1660 | circuit->area->area_tag, level, |
af8ac8f9 CF |
1661 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len, |
1662 | lsp->hdr.seqno, lsp->hdr.checksum, | |
1663 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1664 | } |
1665 | ||
1666 | return ISIS_OK; | |
eb5d44eb | 1667 | } |
1668 | ||
3f045a08 JB |
1669 | /* |
1670 | * Something has changed or periodic refresh -> regenerate pseudo LSP | |
1671 | */ | |
d62a17ae | 1672 | static int lsp_l1_refresh_pseudo(struct thread *thread) |
eb5d44eb | 1673 | { |
d62a17ae | 1674 | struct isis_circuit *circuit; |
d7c0a89a | 1675 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
eb5d44eb | 1676 | |
d62a17ae | 1677 | circuit = THREAD_ARG(thread); |
f390d2c7 | 1678 | |
d62a17ae | 1679 | circuit->u.bc.t_refresh_pseudo_lsp[0] = NULL; |
1680 | circuit->lsp_regenerate_pending[0] = 0; | |
13c48f72 | 1681 | |
d62a17ae | 1682 | if ((circuit->u.bc.is_dr[0] == 0) |
1683 | || (circuit->is_type & IS_LEVEL_1) == 0) { | |
1684 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1685 | LSP_PSEUDO_ID(id) = circuit->circuit_id; | |
1686 | LSP_FRAGMENT(id) = 0; | |
1687 | lsp_purge_pseudo(id, circuit, IS_LEVEL_1); | |
1688 | return ISIS_ERROR; | |
1689 | } | |
eb5d44eb | 1690 | |
d62a17ae | 1691 | return lsp_regenerate_pseudo(circuit, IS_LEVEL_1); |
eb5d44eb | 1692 | } |
1693 | ||
d62a17ae | 1694 | static int lsp_l2_refresh_pseudo(struct thread *thread) |
eb5d44eb | 1695 | { |
d62a17ae | 1696 | struct isis_circuit *circuit; |
d7c0a89a | 1697 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
f390d2c7 | 1698 | |
d62a17ae | 1699 | circuit = THREAD_ARG(thread); |
f390d2c7 | 1700 | |
d62a17ae | 1701 | circuit->u.bc.t_refresh_pseudo_lsp[1] = NULL; |
1702 | circuit->lsp_regenerate_pending[1] = 0; | |
13c48f72 | 1703 | |
d62a17ae | 1704 | if ((circuit->u.bc.is_dr[1] == 0) |
1705 | || (circuit->is_type & IS_LEVEL_2) == 0) { | |
1706 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1707 | LSP_PSEUDO_ID(id) = circuit->circuit_id; | |
1708 | LSP_FRAGMENT(id) = 0; | |
1709 | lsp_purge_pseudo(id, circuit, IS_LEVEL_2); | |
1710 | return ISIS_ERROR; | |
1711 | } | |
eb5d44eb | 1712 | |
d62a17ae | 1713 | return lsp_regenerate_pseudo(circuit, IS_LEVEL_2); |
eb5d44eb | 1714 | } |
1715 | ||
d62a17ae | 1716 | int lsp_regenerate_schedule_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1717 | { |
d62a17ae | 1718 | struct isis_lsp *lsp; |
d7c0a89a | 1719 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1720 | time_t now, diff; |
1721 | long timeout; | |
1722 | int lvl; | |
1723 | struct isis_area *area = circuit->area; | |
1724 | ||
1725 | if (circuit->circ_type != CIRCUIT_T_BROADCAST | |
1726 | || circuit->state != C_STATE_UP) | |
1727 | return ISIS_OK; | |
1728 | ||
1729 | sched_debug( | |
1730 | "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s", | |
1731 | area->area_tag, circuit_t2string(level), | |
1732 | circuit->interface->name); | |
1733 | ||
1734 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1735 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1736 | LSP_FRAGMENT(lsp_id) = 0; | |
1737 | now = time(NULL); | |
1738 | ||
1739 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1740 | sched_debug( | |
1741 | "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled", | |
1742 | area->area_tag, lvl); | |
1743 | ||
1744 | if (!((level & lvl) && (circuit->is_type & lvl))) { | |
1745 | sched_debug("ISIS (%s): Level is not active on circuit", | |
1746 | area->area_tag); | |
1747 | continue; | |
1748 | } | |
1749 | ||
1750 | if (circuit->u.bc.is_dr[lvl - 1] == 0) { | |
1751 | sched_debug( | |
1752 | "ISIS (%s): This IS is not DR, nothing to do.", | |
1753 | area->area_tag); | |
1754 | continue; | |
1755 | } | |
1756 | ||
1757 | if (circuit->lsp_regenerate_pending[lvl - 1]) { | |
1758 | struct timeval remain = thread_timer_remain( | |
1759 | circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1760 | sched_debug( | |
1761 | "ISIS (%s): Regenerate is already pending, nothing todo." | |
1762 | " (Due in %lld.%03lld seconds)", | |
1763 | area->area_tag, (long long)remain.tv_sec, | |
1764 | (long long)remain.tv_usec / 1000); | |
1765 | continue; | |
1766 | } | |
1767 | ||
1768 | lsp = lsp_search(lsp_id, circuit->area->lspdb[lvl - 1]); | |
1769 | if (!lsp) { | |
1770 | sched_debug( | |
1771 | "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.", | |
1772 | area->area_tag); | |
1773 | continue; | |
1774 | } | |
1775 | ||
1776 | /* | |
1777 | * Throttle avoidance | |
1778 | */ | |
1779 | sched_debug( | |
1780 | "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld", | |
1781 | area->area_tag, (long long)lsp->last_generated, | |
1782 | (long long)now); | |
1783 | THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1784 | diff = now - lsp->last_generated; | |
1785 | if (diff < circuit->area->lsp_gen_interval[lvl - 1]) { | |
9d303b37 DL |
1786 | timeout = |
1787 | 1000 * (circuit->area->lsp_gen_interval[lvl - 1] | |
1788 | - diff); | |
d62a17ae | 1789 | sched_debug( |
1790 | "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval", | |
1791 | area->area_tag, timeout); | |
1792 | } else { | |
1793 | timeout = 100; | |
1794 | sched_debug( | |
1795 | "ISIS (%s): Last generation was more than lsp_gen_interval ago." | |
1796 | " Scheduling for execution in %ld ms.", | |
1797 | area->area_tag, timeout); | |
1798 | } | |
1799 | ||
1800 | circuit->lsp_regenerate_pending[lvl - 1] = 1; | |
1801 | ||
1802 | if (lvl == IS_LEVEL_1) { | |
1803 | thread_add_timer_msec( | |
1804 | master, lsp_l1_refresh_pseudo, circuit, timeout, | |
1805 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1806 | } else if (lvl == IS_LEVEL_2) { | |
1807 | thread_add_timer_msec( | |
1808 | master, lsp_l2_refresh_pseudo, circuit, timeout, | |
1809 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1810 | } | |
1811 | } | |
1812 | ||
1813 | return ISIS_OK; | |
f390d2c7 | 1814 | } |
eb5d44eb | 1815 | |
1816 | /* | |
1817 | * Walk through LSPs for an area | |
1818 | * - set remaining lifetime | |
eb5d44eb | 1819 | */ |
d62a17ae | 1820 | int lsp_tick(struct thread *thread) |
eb5d44eb | 1821 | { |
d62a17ae | 1822 | struct isis_area *area; |
d62a17ae | 1823 | struct isis_lsp *lsp; |
d62a17ae | 1824 | dnode_t *dnode, *dnode_next; |
1825 | int level; | |
d7c0a89a | 1826 | uint16_t rem_lifetime; |
8e6fb83b | 1827 | bool fabricd_sync_incomplete = false; |
d62a17ae | 1828 | |
d62a17ae | 1829 | area = THREAD_ARG(thread); |
1830 | assert(area); | |
1831 | area->t_tick = NULL; | |
1832 | thread_add_timer(master, lsp_tick, area, 1, &area->t_tick); | |
1833 | ||
8e6fb83b CF |
1834 | struct isis_circuit *fabricd_init_c = fabricd_initial_sync_circuit(area); |
1835 | ||
d62a17ae | 1836 | /* |
9b39405f | 1837 | * Remove LSPs which have aged out |
d62a17ae | 1838 | */ |
1839 | for (level = 0; level < ISIS_LEVELS; level++) { | |
1840 | if (area->lspdb[level] && dict_count(area->lspdb[level]) > 0) { | |
1841 | for (dnode = dict_first(area->lspdb[level]); | |
1842 | dnode != NULL; dnode = dnode_next) { | |
1843 | dnode_next = | |
1844 | dict_next(area->lspdb[level], dnode); | |
1845 | lsp = dnode_get(dnode); | |
1846 | ||
1847 | /* | |
1848 | * The lsp rem_lifetime is kept at 0 for MaxAge | |
1849 | * or | |
1850 | * ZeroAgeLifetime depending on explicit purge | |
1851 | * or | |
1852 | * natural age out. So schedule spf only once | |
1853 | * when | |
1854 | * the first time rem_lifetime becomes 0. | |
1855 | */ | |
af8ac8f9 | 1856 | rem_lifetime = lsp->hdr.rem_lifetime; |
d62a17ae | 1857 | lsp_set_time(lsp); |
1858 | ||
1859 | /* | |
1860 | * Schedule may run spf which should be done | |
1861 | * only after | |
1862 | * the lsp rem_lifetime becomes 0 for the first | |
1863 | * time. | |
1864 | * ISO 10589 - 7.3.16.4 first paragraph. | |
1865 | */ | |
af8ac8f9 | 1866 | if (rem_lifetime == 1 && lsp->hdr.seqno != 0) { |
d62a17ae | 1867 | /* 7.3.16.4 a) set SRM flags on all */ |
9b39405f | 1868 | lsp_flood(lsp, NULL); |
d62a17ae | 1869 | /* 7.3.16.4 b) retain only the header |
1870 | * FIXME */ | |
1871 | /* 7.3.16.4 c) record the time to purge | |
1872 | * FIXME */ | |
1873 | /* run/schedule spf */ | |
1874 | /* isis_spf_schedule is called inside | |
1875 | * lsp_destroy() below; | |
1876 | * so it is not needed here. */ | |
1877 | /* isis_spf_schedule (lsp->area, | |
1878 | * lsp->level); */ | |
1879 | } | |
1880 | ||
1881 | if (lsp->age_out == 0) { | |
1882 | zlog_debug( | |
af8ac8f9 CF |
1883 | "ISIS-Upd (%s): L%u LSP %s seq " |
1884 | "0x%08" PRIx32 " aged out", | |
d62a17ae | 1885 | area->area_tag, lsp->level, |
af8ac8f9 CF |
1886 | rawlspid_print(lsp->hdr.lsp_id), |
1887 | lsp->hdr.seqno); | |
d62a17ae | 1888 | lsp_destroy(lsp); |
1889 | lsp = NULL; | |
1890 | dict_delete_free(area->lspdb[level], | |
1891 | dnode); | |
9b39405f | 1892 | } |
8e6fb83b CF |
1893 | |
1894 | if (fabricd_init_c) { | |
1895 | fabricd_sync_incomplete |= | |
1896 | ISIS_CHECK_FLAG(lsp->SSNflags, | |
1897 | fabricd_init_c); | |
d62a17ae | 1898 | } |
d62a17ae | 1899 | } |
1900 | } | |
1901 | } | |
1902 | ||
9b39405f CF |
1903 | if (fabricd_init_c |
1904 | && !fabricd_sync_incomplete | |
1905 | && !isis_tx_queue_len(fabricd_init_c->tx_queue)) { | |
8e6fb83b | 1906 | fabricd_initial_sync_finish(area); |
9b39405f | 1907 | } |
d62a17ae | 1908 | |
1909 | return ISIS_OK; | |
eb5d44eb | 1910 | } |
1911 | ||
d7c0a89a | 1912 | void lsp_purge_pseudo(uint8_t *id, struct isis_circuit *circuit, int level) |
eb5d44eb | 1913 | { |
d62a17ae | 1914 | struct isis_lsp *lsp; |
d62a17ae | 1915 | |
1916 | lsp = lsp_search(id, circuit->area->lspdb[level - 1]); | |
1917 | if (!lsp) | |
1918 | return; | |
1919 | ||
af8ac8f9 | 1920 | lsp_purge(lsp, level); |
eb5d44eb | 1921 | } |
1922 | ||
1923 | /* | |
d62a17ae | 1924 | * Purge own LSP that is received and we don't have. |
eb5d44eb | 1925 | * -> Do as in 7.3.16.4 |
1926 | */ | |
af8ac8f9 | 1927 | void lsp_purge_non_exist(int level, struct isis_lsp_hdr *hdr, |
d62a17ae | 1928 | struct isis_area *area) |
eb5d44eb | 1929 | { |
d62a17ae | 1930 | struct isis_lsp *lsp; |
1931 | ||
1932 | /* | |
1933 | * We need to create the LSP to be purged | |
1934 | */ | |
1935 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
1936 | lsp->area = area; | |
1937 | lsp->level = level; | |
1938 | lsp->pdu = stream_new(LLC_LEN + area->lsp_mtu); | |
af8ac8f9 | 1939 | lsp->age_out = ZERO_AGE_LIFETIME; |
d62a17ae | 1940 | |
af8ac8f9 CF |
1941 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
1942 | lsp->hdr.rem_lifetime = 0; | |
d62a17ae | 1943 | |
af8ac8f9 | 1944 | lsp_pack_pdu(lsp); |
d62a17ae | 1945 | |
d62a17ae | 1946 | lsp_insert(lsp, area->lspdb[lsp->level - 1]); |
9b39405f | 1947 | lsp_flood(lsp, NULL); |
d62a17ae | 1948 | |
1949 | return; | |
eb5d44eb | 1950 | } |
1951 | ||
9b39405f | 1952 | void lsp_set_all_srmflags(struct isis_lsp *lsp, bool set) |
3f045a08 | 1953 | { |
d62a17ae | 1954 | struct listnode *node; |
1955 | struct isis_circuit *circuit; | |
3f045a08 | 1956 | |
d62a17ae | 1957 | assert(lsp); |
3f045a08 | 1958 | |
9b39405f CF |
1959 | if (!lsp->area) |
1960 | return; | |
3f045a08 | 1961 | |
9b39405f CF |
1962 | struct list *circuit_list = lsp->area->circuit_list; |
1963 | for (ALL_LIST_ELEMENTS_RO(circuit_list, node, circuit)) { | |
1964 | if (set) { | |
1965 | isis_tx_queue_add(circuit->tx_queue, lsp, | |
1966 | TX_LSP_NORMAL); | |
1967 | } else { | |
1968 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
d62a17ae | 1969 | } |
1970 | } | |
3f045a08 | 1971 | } |
9b39405f CF |
1972 | |
1973 | void lsp_flood(struct isis_lsp *lsp, struct isis_circuit *circuit) | |
1974 | { | |
1975 | lsp_set_all_srmflags(lsp); | |
1976 | if (circuit) | |
1977 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
1978 | } |