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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 | |
9196731f | 62 | static int lsp_refresh(struct thread *thread); |
d62a17ae | 63 | static int lsp_l1_refresh_pseudo(struct thread *thread); |
64 | static int lsp_l2_refresh_pseudo(struct thread *thread); | |
3f045a08 | 65 | |
d7c0a89a | 66 | int lsp_id_cmp(uint8_t *id1, uint8_t *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 | ||
d7c0a89a | 80 | struct isis_lsp *lsp_search(uint8_t *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", | |
d7c0a89a | 90 | rawlspid_print((uint8_t *)dnode_getkey(dn)), |
d62a17ae | 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 | ||
dc84cf14 CF |
112 | static void lsp_remove_frags(struct list *frags, dict_t *lspdb); |
113 | ||
d62a17ae | 114 | static void lsp_destroy(struct isis_lsp *lsp) |
eb5d44eb | 115 | { |
58e16237 | 116 | struct listnode *cnode; |
d62a17ae | 117 | struct isis_circuit *circuit; |
118 | ||
119 | if (!lsp) | |
120 | return; | |
121 | ||
58e16237 | 122 | for (ALL_LIST_ELEMENTS_RO(lsp->area->circuit_list, cnode, circuit)) |
9b39405f | 123 | isis_tx_queue_del(circuit->tx_queue, lsp); |
58e16237 | 124 | |
d62a17ae | 125 | ISIS_FLAGS_CLEAR_ALL(lsp->SSNflags); |
d62a17ae | 126 | |
127 | lsp_clear_data(lsp); | |
128 | ||
dc84cf14 CF |
129 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) { |
130 | if (lsp->lspu.frags) { | |
131 | lsp_remove_frags(lsp->lspu.frags, | |
132 | lsp->area->lspdb[lsp->level - 1]); | |
133 | list_delete(&lsp->lspu.frags); | |
134 | } | |
135 | } else { | |
136 | if (lsp->lspu.zero_lsp | |
137 | && lsp->lspu.zero_lsp->lspu.frags) { | |
138 | listnode_delete(lsp->lspu.zero_lsp->lspu.frags, lsp); | |
139 | } | |
d62a17ae | 140 | } |
141 | ||
142 | isis_spf_schedule(lsp->area, lsp->level); | |
143 | ||
144 | if (lsp->pdu) | |
145 | stream_free(lsp->pdu); | |
146 | XFREE(MTYPE_ISIS_LSP, lsp); | |
eb5d44eb | 147 | } |
148 | ||
d62a17ae | 149 | void lsp_db_destroy(dict_t *lspdb) |
eb5d44eb | 150 | { |
d62a17ae | 151 | dnode_t *dnode, *next; |
152 | struct isis_lsp *lsp; | |
153 | ||
154 | dnode = dict_first(lspdb); | |
155 | while (dnode) { | |
156 | next = dict_next(lspdb, dnode); | |
157 | lsp = dnode_get(dnode); | |
158 | lsp_destroy(lsp); | |
159 | dict_delete_free(lspdb, dnode); | |
160 | dnode = next; | |
161 | } | |
162 | ||
163 | dict_free(lspdb); | |
164 | ||
165 | return; | |
eb5d44eb | 166 | } |
167 | ||
168 | /* | |
169 | * Remove all the frags belonging to the given lsp | |
170 | */ | |
d62a17ae | 171 | static void lsp_remove_frags(struct list *frags, dict_t *lspdb) |
eb5d44eb | 172 | { |
d62a17ae | 173 | dnode_t *dnode; |
174 | struct listnode *lnode, *lnnode; | |
175 | struct isis_lsp *lsp; | |
176 | ||
177 | for (ALL_LIST_ELEMENTS(frags, lnode, lnnode, lsp)) { | |
af8ac8f9 | 178 | dnode = dict_lookup(lspdb, lsp->hdr.lsp_id); |
d62a17ae | 179 | lsp_destroy(lsp); |
180 | dnode_destroy(dict_delete(lspdb, dnode)); | |
181 | } | |
eb5d44eb | 182 | } |
183 | ||
d7c0a89a | 184 | void lsp_search_and_destroy(uint8_t *id, dict_t *lspdb) |
eb5d44eb | 185 | { |
d62a17ae | 186 | dnode_t *node; |
187 | struct isis_lsp *lsp; | |
188 | ||
189 | node = dict_lookup(lspdb, id); | |
190 | if (node) { | |
191 | node = dict_delete(lspdb, node); | |
192 | lsp = dnode_get(node); | |
193 | /* | |
194 | * If this is a zero lsp, remove all the frags now | |
195 | */ | |
af8ac8f9 | 196 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) == 0) { |
d62a17ae | 197 | if (lsp->lspu.frags) |
198 | lsp_remove_frags(lsp->lspu.frags, lspdb); | |
199 | } else { | |
200 | /* | |
201 | * else just remove this frag, from the zero lsps' frag | |
202 | * list | |
203 | */ | |
204 | if (lsp->lspu.zero_lsp | |
205 | && lsp->lspu.zero_lsp->lspu.frags) | |
206 | listnode_delete(lsp->lspu.zero_lsp->lspu.frags, | |
207 | lsp); | |
208 | } | |
209 | lsp_destroy(lsp); | |
210 | dnode_destroy(node); | |
211 | } | |
eb5d44eb | 212 | } |
213 | ||
214 | /* | |
215 | * Compares a LSP to given values | |
216 | * Params are given in net order | |
217 | */ | |
af8ac8f9 CF |
218 | int lsp_compare(char *areatag, struct isis_lsp *lsp, uint32_t seqno, |
219 | uint16_t checksum, uint16_t rem_lifetime) | |
eb5d44eb | 220 | { |
af8ac8f9 CF |
221 | if (lsp->hdr.seqno == seqno && lsp->hdr.checksum == checksum |
222 | && ((lsp->hdr.rem_lifetime == 0 && rem_lifetime == 0) | |
223 | || (lsp->hdr.rem_lifetime != 0 && rem_lifetime != 0))) { | |
d62a17ae | 224 | if (isis->debugs & DEBUG_SNP_PACKETS) { |
225 | zlog_debug( | |
af8ac8f9 CF |
226 | "ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32 |
227 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
228 | "s", | |
229 | areatag, rawlspid_print(lsp->hdr.lsp_id), | |
230 | lsp->hdr.seqno, lsp->hdr.checksum, | |
231 | lsp->hdr.rem_lifetime); | |
d62a17ae | 232 | zlog_debug( |
af8ac8f9 CF |
233 | "ISIS-Snp (%s): is equal to ours seq 0x%08" PRIx32 |
234 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
235 | "s", | |
236 | areatag, seqno, checksum, rem_lifetime); | |
d62a17ae | 237 | } |
238 | return LSP_EQUAL; | |
239 | } | |
240 | ||
241 | /* | |
242 | * LSPs with identical checksums should only be treated as newer if: | |
243 | * a) The current LSP has a remaining lifetime != 0 and the other LSP | |
244 | * has a | |
245 | * remaining lifetime == 0. In this case, we should participate in | |
246 | * the purge | |
247 | * and should not treat the current LSP with remaining lifetime == 0 | |
248 | * as older. | |
249 | * b) The LSP has an incorrect checksum. In this case, we need to react | |
250 | * as given | |
251 | * in 7.3.16.2. | |
252 | */ | |
af8ac8f9 CF |
253 | if (seqno > lsp->hdr.seqno |
254 | || (seqno == lsp->hdr.seqno | |
255 | && ((lsp->hdr.rem_lifetime != 0 && rem_lifetime == 0) | |
16c2ab97 CF |
256 | || (lsp->hdr.checksum != checksum |
257 | && lsp->hdr.rem_lifetime)))) { | |
d62a17ae | 258 | if (isis->debugs & DEBUG_SNP_PACKETS) { |
259 | zlog_debug( | |
af8ac8f9 CF |
260 | "ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32 |
261 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
262 | "s", | |
263 | areatag, rawlspid_print(lsp->hdr.lsp_id), seqno, | |
264 | checksum, rem_lifetime); | |
d62a17ae | 265 | zlog_debug( |
af8ac8f9 CF |
266 | "ISIS-Snp (%s): is newer than ours seq 0x%08" PRIx32 |
267 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
268 | "s", | |
269 | areatag, lsp->hdr.seqno, lsp->hdr.checksum, | |
270 | lsp->hdr.rem_lifetime); | |
d62a17ae | 271 | } |
272 | return LSP_NEWER; | |
273 | } | |
274 | if (isis->debugs & DEBUG_SNP_PACKETS) { | |
af8ac8f9 CF |
275 | zlog_debug("ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32 |
276 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s", | |
277 | areatag, rawlspid_print(lsp->hdr.lsp_id), seqno, | |
278 | checksum, rem_lifetime); | |
d62a17ae | 279 | zlog_debug( |
af8ac8f9 CF |
280 | "ISIS-Snp (%s): is older than ours seq 0x%08" PRIx32 |
281 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s", | |
282 | areatag, lsp->hdr.seqno, lsp->hdr.checksum, | |
283 | lsp->hdr.rem_lifetime); | |
d62a17ae | 284 | } |
285 | ||
286 | return LSP_OLDER; | |
eb5d44eb | 287 | } |
288 | ||
c55018ab | 289 | static void put_lsp_hdr(struct isis_lsp *lsp, size_t *len_pointer, bool keep) |
3f045a08 | 290 | { |
af8ac8f9 CF |
291 | uint8_t pdu_type = |
292 | (lsp->level == IS_LEVEL_1) ? L1_LINK_STATE : L2_LINK_STATE; | |
293 | struct isis_lsp_hdr *hdr = &lsp->hdr; | |
294 | struct stream *stream = lsp->pdu; | |
b599ec55 | 295 | size_t orig_getp = 0, orig_endp = 0; |
c55018ab CF |
296 | |
297 | if (keep) { | |
298 | orig_getp = stream_get_getp(lsp->pdu); | |
299 | orig_endp = stream_get_endp(lsp->pdu); | |
300 | } | |
301 | ||
302 | stream_set_getp(lsp->pdu, 0); | |
303 | stream_set_endp(lsp->pdu, 0); | |
af8ac8f9 CF |
304 | |
305 | fill_fixed_hdr(pdu_type, stream); | |
306 | ||
307 | if (len_pointer) | |
308 | *len_pointer = stream_get_endp(stream); | |
309 | stream_putw(stream, hdr->pdu_len); | |
310 | stream_putw(stream, hdr->rem_lifetime); | |
311 | stream_put(stream, hdr->lsp_id, sizeof(hdr->lsp_id)); | |
312 | stream_putl(stream, hdr->seqno); | |
313 | stream_putw(stream, hdr->checksum); | |
314 | stream_putc(stream, hdr->lsp_bits); | |
c55018ab CF |
315 | |
316 | if (keep) { | |
317 | stream_set_endp(lsp->pdu, orig_endp); | |
318 | stream_set_getp(lsp->pdu, orig_getp); | |
319 | } | |
3f045a08 JB |
320 | } |
321 | ||
af8ac8f9 | 322 | static void lsp_add_auth(struct isis_lsp *lsp) |
3f045a08 | 323 | { |
d62a17ae | 324 | struct isis_passwd *passwd; |
af8ac8f9 CF |
325 | passwd = (lsp->level == IS_LEVEL_1) ? &lsp->area->area_passwd |
326 | : &lsp->area->domain_passwd; | |
327 | isis_tlvs_add_auth(lsp->tlvs, passwd); | |
328 | } | |
d62a17ae | 329 | |
af8ac8f9 CF |
330 | static void lsp_pack_pdu(struct isis_lsp *lsp) |
331 | { | |
332 | if (!lsp->tlvs) | |
333 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 334 | |
af8ac8f9 | 335 | lsp_add_auth(lsp); |
d62a17ae | 336 | |
af8ac8f9 | 337 | size_t len_pointer; |
c55018ab | 338 | put_lsp_hdr(lsp, &len_pointer, false); |
af8ac8f9 CF |
339 | isis_pack_tlvs(lsp->tlvs, lsp->pdu, len_pointer, false, true); |
340 | ||
341 | lsp->hdr.pdu_len = stream_get_endp(lsp->pdu); | |
342 | lsp->hdr.checksum = | |
343 | ntohs(fletcher_checksum(STREAM_DATA(lsp->pdu) + 12, | |
344 | stream_get_endp(lsp->pdu) - 12, 12)); | |
3f045a08 JB |
345 | } |
346 | ||
af8ac8f9 | 347 | void lsp_inc_seqno(struct isis_lsp *lsp, uint32_t seqno) |
eb5d44eb | 348 | { |
af8ac8f9 | 349 | uint32_t newseq; |
d62a17ae | 350 | |
af8ac8f9 CF |
351 | if (seqno == 0 || lsp->hdr.seqno > seqno) |
352 | newseq = lsp->hdr.seqno + 1; | |
d62a17ae | 353 | else |
af8ac8f9 | 354 | newseq = seqno + 1; |
d62a17ae | 355 | |
af8ac8f9 CF |
356 | lsp->hdr.seqno = newseq; |
357 | ||
358 | lsp_pack_pdu(lsp); | |
d62a17ae | 359 | isis_spf_schedule(lsp->area, lsp->level); |
af8ac8f9 | 360 | } |
d62a17ae | 361 | |
2c92bee4 CF |
362 | static void lsp_purge_add_poi(struct isis_lsp *lsp, |
363 | const uint8_t *sender) | |
364 | { | |
365 | if (!lsp->area->purge_originator) | |
366 | return; | |
367 | ||
368 | /* add purge originator identification */ | |
369 | if (!lsp->tlvs) | |
370 | lsp->tlvs = isis_alloc_tlvs(); | |
371 | isis_tlvs_set_purge_originator(lsp->tlvs, isis->sysid, sender); | |
372 | isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get()); | |
373 | } | |
374 | ||
375 | static void lsp_purge(struct isis_lsp *lsp, int level, | |
376 | const uint8_t *sender) | |
af8ac8f9 CF |
377 | { |
378 | /* reset stream */ | |
379 | lsp_clear_data(lsp); | |
380 | stream_reset(lsp->pdu); | |
381 | ||
382 | /* update header */ | |
383 | lsp->hdr.checksum = 0; | |
384 | lsp->hdr.rem_lifetime = 0; | |
385 | lsp->level = level; | |
386 | lsp->age_out = lsp->area->max_lsp_lifetime[level - 1]; | |
387 | ||
2c92bee4 CF |
388 | lsp_purge_add_poi(lsp, sender); |
389 | ||
af8ac8f9 | 390 | lsp_pack_pdu(lsp); |
9b39405f | 391 | lsp_flood(lsp, NULL); |
eb5d44eb | 392 | } |
393 | ||
394 | /* | |
af8ac8f9 | 395 | * Generates checksum for LSP and its frags |
eb5d44eb | 396 | */ |
af8ac8f9 | 397 | static void lsp_seqno_update(struct isis_lsp *lsp0) |
eb5d44eb | 398 | { |
d62a17ae | 399 | struct isis_lsp *lsp; |
400 | struct listnode *node; | |
f390d2c7 | 401 | |
af8ac8f9 | 402 | lsp_inc_seqno(lsp0, 0); |
eb5d44eb | 403 | |
d62a17ae | 404 | if (!lsp0->lspu.frags) |
405 | return; | |
eb5d44eb | 406 | |
af8ac8f9 CF |
407 | for (ALL_LIST_ELEMENTS_RO(lsp0->lspu.frags, node, lsp)) { |
408 | if (lsp->tlvs) | |
409 | lsp_inc_seqno(lsp, 0); | |
8f27aa27 CF |
410 | else if (lsp->hdr.rem_lifetime) { |
411 | /* Purge should only be applied when the fragment has | |
412 | * non-zero remaining lifetime. | |
413 | */ | |
2c92bee4 | 414 | lsp_purge(lsp, lsp0->level, NULL); |
8f27aa27 | 415 | } |
af8ac8f9 | 416 | } |
f390d2c7 | 417 | |
d62a17ae | 418 | return; |
eb5d44eb | 419 | } |
420 | ||
d7c0a89a | 421 | static uint8_t lsp_bits_generate(int level, int overload_bit, int attached_bit) |
e38e0df0 | 422 | { |
d7c0a89a | 423 | uint8_t lsp_bits = 0; |
d62a17ae | 424 | if (level == IS_LEVEL_1) |
425 | lsp_bits = IS_LEVEL_1; | |
426 | else | |
427 | lsp_bits = IS_LEVEL_1_AND_2; | |
428 | if (overload_bit) | |
429 | lsp_bits |= overload_bit; | |
430 | if (attached_bit) | |
431 | lsp_bits |= attached_bit; | |
432 | return lsp_bits; | |
e38e0df0 SV |
433 | } |
434 | ||
af8ac8f9 CF |
435 | static void lsp_update_data(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr, |
436 | struct isis_tlvs *tlvs, struct stream *stream, | |
d62a17ae | 437 | struct isis_area *area, int level) |
eb5d44eb | 438 | { |
d62a17ae | 439 | /* free the old lsp data */ |
440 | lsp_clear_data(lsp); | |
441 | ||
442 | /* copying only the relevant part of our stream */ | |
443 | if (lsp->pdu != NULL) | |
444 | stream_free(lsp->pdu); | |
445 | lsp->pdu = stream_dup(stream); | |
446 | ||
af8ac8f9 | 447 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
d62a17ae | 448 | lsp->area = area; |
449 | lsp->level = level; | |
450 | lsp->age_out = ZERO_AGE_LIFETIME; | |
451 | lsp->installed = time(NULL); | |
d62a17ae | 452 | |
af8ac8f9 CF |
453 | lsp->tlvs = tlvs; |
454 | ||
2c92bee4 CF |
455 | if (area->dynhostname && lsp->tlvs->hostname |
456 | && lsp->hdr.rem_lifetime) { | |
af8ac8f9 CF |
457 | isis_dynhn_insert(lsp->hdr.lsp_id, lsp->tlvs->hostname, |
458 | (lsp->hdr.lsp_bits & LSPBIT_IST) | |
d62a17ae | 459 | == IS_LEVEL_1_AND_2 |
460 | ? IS_LEVEL_2 | |
461 | : IS_LEVEL_1); | |
462 | } | |
463 | ||
464 | return; | |
eb5d44eb | 465 | } |
466 | ||
0b8b6cab CF |
467 | static void lsp_link_fragment(struct isis_lsp *lsp, struct isis_lsp *lsp0) |
468 | { | |
469 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) { | |
470 | /* zero lsp -> create list to store fragments */ | |
471 | lsp->lspu.frags = list_new(); | |
472 | } else { | |
473 | /* fragment -> set backpointer and add to zero lsps list */ | |
474 | assert(lsp0); | |
475 | lsp->lspu.zero_lsp = lsp0; | |
476 | listnode_add(lsp0->lspu.frags, lsp); | |
477 | } | |
478 | } | |
479 | ||
af8ac8f9 CF |
480 | void lsp_update(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr, |
481 | struct isis_tlvs *tlvs, struct stream *stream, | |
164066e4 | 482 | struct isis_area *area, int level, bool confusion) |
eb5d44eb | 483 | { |
d62a17ae | 484 | if (lsp->own_lsp) { |
af4c2728 | 485 | flog_err( |
450971aa | 486 | EC_LIB_DEVELOPMENT, |
d62a17ae | 487 | "ISIS-Upd (%s): BUG updating LSP %s still marked as own LSP", |
af8ac8f9 | 488 | area->area_tag, rawlspid_print(lsp->hdr.lsp_id)); |
d62a17ae | 489 | lsp_clear_data(lsp); |
490 | lsp->own_lsp = 0; | |
491 | } | |
492 | ||
164066e4 | 493 | if (confusion) { |
2c92bee4 CF |
494 | lsp_purge(lsp, level, NULL); |
495 | } else { | |
496 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); | |
164066e4 | 497 | } |
d62a17ae | 498 | |
0b8b6cab CF |
499 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) && !lsp->lspu.zero_lsp) { |
500 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
501 | struct isis_lsp *lsp0; | |
eb5d44eb | 502 | |
0b8b6cab CF |
503 | memcpy(lspid, lsp->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); |
504 | LSP_FRAGMENT(lspid) = 0; | |
505 | lsp0 = lsp_search(lspid, area->lspdb[level - 1]); | |
506 | if (lsp0) | |
507 | lsp_link_fragment(lsp, lsp0); | |
8f5dbe18 | 508 | } |
0b8b6cab | 509 | |
5304211a CF |
510 | if (lsp->hdr.seqno) |
511 | isis_spf_schedule(lsp->area, lsp->level); | |
8f5dbe18 CF |
512 | } |
513 | ||
eb5d44eb | 514 | /* creation of LSP directly from what we received */ |
af8ac8f9 CF |
515 | struct isis_lsp *lsp_new_from_recv(struct isis_lsp_hdr *hdr, |
516 | struct isis_tlvs *tlvs, | |
517 | struct stream *stream, struct isis_lsp *lsp0, | |
518 | struct isis_area *area, int level) | |
eb5d44eb | 519 | { |
d62a17ae | 520 | struct isis_lsp *lsp; |
521 | ||
522 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
af8ac8f9 | 523 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); |
8f5dbe18 | 524 | lsp_link_fragment(lsp, lsp0); |
d62a17ae | 525 | |
526 | return lsp; | |
eb5d44eb | 527 | } |
528 | ||
d07067ba CF |
529 | static void lsp_adjust_stream(struct isis_lsp *lsp) |
530 | { | |
531 | if (lsp->pdu) { | |
532 | if (STREAM_SIZE(lsp->pdu) == LLC_LEN + lsp->area->lsp_mtu) | |
533 | return; | |
534 | stream_free(lsp->pdu); | |
535 | } | |
536 | ||
537 | lsp->pdu = stream_new(LLC_LEN + lsp->area->lsp_mtu); | |
538 | } | |
539 | ||
d7c0a89a | 540 | struct isis_lsp *lsp_new(struct isis_area *area, uint8_t *lsp_id, |
af8ac8f9 | 541 | uint16_t rem_lifetime, uint32_t seqno, |
8f5dbe18 CF |
542 | uint8_t lsp_bits, uint16_t checksum, |
543 | struct isis_lsp *lsp0, int level) | |
eb5d44eb | 544 | { |
d62a17ae | 545 | struct isis_lsp *lsp; |
546 | ||
547 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
548 | lsp->area = area; | |
549 | ||
d07067ba | 550 | lsp_adjust_stream(lsp); |
d62a17ae | 551 | |
d62a17ae | 552 | /* Minimal LSP PDU size */ |
af8ac8f9 CF |
553 | lsp->hdr.pdu_len = ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN; |
554 | memcpy(lsp->hdr.lsp_id, lsp_id, sizeof(lsp->hdr.lsp_id)); | |
555 | lsp->hdr.checksum = checksum; | |
556 | lsp->hdr.seqno = seqno; | |
557 | lsp->hdr.rem_lifetime = rem_lifetime; | |
558 | lsp->hdr.lsp_bits = lsp_bits; | |
d62a17ae | 559 | lsp->level = level; |
560 | lsp->age_out = ZERO_AGE_LIFETIME; | |
8f5dbe18 | 561 | lsp_link_fragment(lsp, lsp0); |
c55018ab | 562 | put_lsp_hdr(lsp, NULL, false); |
d62a17ae | 563 | |
564 | if (isis->debugs & DEBUG_EVENTS) | |
565 | zlog_debug("New LSP with ID %s-%02x-%02x len %d seqnum %08x", | |
af8ac8f9 CF |
566 | sysid_print(lsp_id), LSP_PSEUDO_ID(lsp->hdr.lsp_id), |
567 | LSP_FRAGMENT(lsp->hdr.lsp_id), lsp->hdr.pdu_len, | |
568 | lsp->hdr.seqno); | |
d62a17ae | 569 | |
570 | return lsp; | |
eb5d44eb | 571 | } |
572 | ||
d62a17ae | 573 | void lsp_insert(struct isis_lsp *lsp, dict_t *lspdb) |
eb5d44eb | 574 | { |
af8ac8f9 CF |
575 | dict_alloc_insert(lspdb, lsp->hdr.lsp_id, lsp); |
576 | if (lsp->hdr.seqno) | |
d62a17ae | 577 | isis_spf_schedule(lsp->area, lsp->level); |
eb5d44eb | 578 | } |
579 | ||
580 | /* | |
581 | * Build a list of LSPs with non-zero ht bounded by start and stop ids | |
582 | */ | |
d7c0a89a | 583 | void lsp_build_list_nonzero_ht(uint8_t *start_id, uint8_t *stop_id, |
d62a17ae | 584 | struct list *list, dict_t *lspdb) |
eb5d44eb | 585 | { |
9337256e CF |
586 | for (dnode_t *curr = dict_lower_bound(lspdb, start_id); |
587 | curr; curr = dict_next(lspdb, curr)) { | |
588 | struct isis_lsp *lsp = curr->dict_data; | |
eb5d44eb | 589 | |
9337256e CF |
590 | if (memcmp(lsp->hdr.lsp_id, stop_id, |
591 | ISIS_SYS_ID_LEN + 2) > 0) | |
d62a17ae | 592 | break; |
f390d2c7 | 593 | |
9337256e CF |
594 | if (lsp->hdr.rem_lifetime) |
595 | listnode_add(list, lsp); | |
596 | } | |
eb5d44eb | 597 | } |
598 | ||
d62a17ae | 599 | static void lsp_set_time(struct isis_lsp *lsp) |
eb5d44eb | 600 | { |
d62a17ae | 601 | assert(lsp); |
f390d2c7 | 602 | |
af8ac8f9 | 603 | if (lsp->hdr.rem_lifetime == 0) { |
d62a17ae | 604 | if (lsp->age_out > 0) |
605 | lsp->age_out--; | |
606 | return; | |
607 | } | |
eb5d44eb | 608 | |
af8ac8f9 CF |
609 | lsp->hdr.rem_lifetime--; |
610 | if (lsp->pdu && stream_get_endp(lsp->pdu) >= 12) | |
611 | stream_putw_at(lsp->pdu, 10, lsp->hdr.rem_lifetime); | |
eb5d44eb | 612 | } |
613 | ||
d7c0a89a | 614 | static void lspid_print(uint8_t *lsp_id, uint8_t *trg, char dynhost, char frag) |
eb5d44eb | 615 | { |
d62a17ae | 616 | struct isis_dynhn *dyn = NULL; |
d7c0a89a | 617 | uint8_t id[SYSID_STRLEN]; |
d62a17ae | 618 | |
619 | if (dynhost) | |
620 | dyn = dynhn_find_by_id(lsp_id); | |
621 | else | |
622 | dyn = NULL; | |
623 | ||
624 | if (dyn) | |
af8ac8f9 | 625 | sprintf((char *)id, "%.14s", dyn->hostname); |
d62a17ae | 626 | else if (!memcmp(isis->sysid, lsp_id, ISIS_SYS_ID_LEN) && dynhost) |
6b3ee3a0 | 627 | sprintf((char *)id, "%.14s", cmd_hostname_get()); |
d62a17ae | 628 | else |
629 | memcpy(id, sysid_print(lsp_id), 15); | |
630 | if (frag) | |
631 | sprintf((char *)trg, "%s.%02x-%02x", id, LSP_PSEUDO_ID(lsp_id), | |
632 | LSP_FRAGMENT(lsp_id)); | |
633 | else | |
634 | sprintf((char *)trg, "%s.%02x", id, LSP_PSEUDO_ID(lsp_id)); | |
eb5d44eb | 635 | } |
636 | ||
f390d2c7 | 637 | /* Convert the lsp attribute bits to attribute string */ |
36228974 | 638 | static const char *lsp_bits2string(uint8_t lsp_bits, char *buf, size_t buf_size) |
f390d2c7 | 639 | { |
36228974 | 640 | char *pos = buf; |
eb5d44eb | 641 | |
af8ac8f9 | 642 | if (!lsp_bits) |
d62a17ae | 643 | return " none"; |
eb5d44eb | 644 | |
36228974 | 645 | if (buf_size < 2 * 3) |
646 | return " error"; | |
647 | ||
d62a17ae | 648 | /* we only focus on the default metric */ |
649 | pos += sprintf(pos, "%d/", | |
af8ac8f9 | 650 | ISIS_MASK_LSP_ATT_DEFAULT_BIT(lsp_bits) ? 1 : 0); |
eb5d44eb | 651 | |
d62a17ae | 652 | pos += sprintf(pos, "%d/", |
af8ac8f9 | 653 | ISIS_MASK_LSP_PARTITION_BIT(lsp_bits) ? 1 : 0); |
f390d2c7 | 654 | |
e36e5b56 | 655 | sprintf(pos, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits) ? 1 : 0); |
eb5d44eb | 656 | |
36228974 | 657 | return buf; |
eb5d44eb | 658 | } |
659 | ||
660 | /* this function prints the lsp on show isis database */ | |
d62a17ae | 661 | void lsp_print(struct isis_lsp *lsp, struct vty *vty, char dynhost) |
eb5d44eb | 662 | { |
d7c0a89a | 663 | uint8_t LSPid[255]; |
d62a17ae | 664 | char age_out[8]; |
36228974 | 665 | char b[200]; |
d62a17ae | 666 | |
af8ac8f9 | 667 | lspid_print(lsp->hdr.lsp_id, LSPid, dynhost, 1); |
d62a17ae | 668 | vty_out(vty, "%-21s%c ", LSPid, lsp->own_lsp ? '*' : ' '); |
af8ac8f9 CF |
669 | vty_out(vty, "%5" PRIu16 " ", lsp->hdr.pdu_len); |
670 | vty_out(vty, "0x%08" PRIx32 " ", lsp->hdr.seqno); | |
671 | vty_out(vty, "0x%04" PRIx16 " ", lsp->hdr.checksum); | |
672 | if (lsp->hdr.rem_lifetime == 0) { | |
673 | snprintf(age_out, 8, "(%d)", lsp->age_out); | |
d62a17ae | 674 | age_out[7] = '\0'; |
675 | vty_out(vty, "%7s ", age_out); | |
676 | } else | |
af8ac8f9 | 677 | vty_out(vty, " %5" PRIu16 " ", lsp->hdr.rem_lifetime); |
36228974 | 678 | vty_out(vty, "%s\n", lsp_bits2string(lsp->hdr.lsp_bits, b, sizeof(b))); |
c3ae3127 CF |
679 | } |
680 | ||
d62a17ae | 681 | void lsp_print_detail(struct isis_lsp *lsp, struct vty *vty, char dynhost) |
eb5d44eb | 682 | { |
d62a17ae | 683 | lsp_print(lsp, vty, dynhost); |
af8ac8f9 CF |
684 | if (lsp->tlvs) |
685 | vty_multiline(vty, " ", "%s", isis_format_tlvs(lsp->tlvs)); | |
d62a17ae | 686 | vty_out(vty, "\n"); |
eb5d44eb | 687 | } |
688 | ||
689 | /* print all the lsps info in the local lspdb */ | |
d62a17ae | 690 | int lsp_print_all(struct vty *vty, dict_t *lspdb, char detail, char dynhost) |
eb5d44eb | 691 | { |
692 | ||
d62a17ae | 693 | dnode_t *node = dict_first(lspdb), *next; |
694 | int lsp_count = 0; | |
695 | ||
696 | if (detail == ISIS_UI_LEVEL_BRIEF) { | |
697 | while (node != NULL) { | |
698 | /* I think it is unnecessary, so I comment it out */ | |
699 | /* dict_contains (lspdb, node); */ | |
700 | next = dict_next(lspdb, node); | |
701 | lsp_print(dnode_get(node), vty, dynhost); | |
702 | node = next; | |
703 | lsp_count++; | |
704 | } | |
705 | } else if (detail == ISIS_UI_LEVEL_DETAIL) { | |
706 | while (node != NULL) { | |
707 | next = dict_next(lspdb, node); | |
708 | lsp_print_detail(dnode_get(node), vty, dynhost); | |
709 | node = next; | |
710 | lsp_count++; | |
711 | } | |
712 | } | |
713 | ||
714 | return lsp_count; | |
eb5d44eb | 715 | } |
716 | ||
d7c0a89a | 717 | static uint16_t lsp_rem_lifetime(struct isis_area *area, int level) |
3f045a08 | 718 | { |
d7c0a89a | 719 | uint16_t rem_lifetime; |
3f045a08 | 720 | |
d62a17ae | 721 | /* Add jitter to configured LSP lifetime */ |
722 | rem_lifetime = | |
723 | isis_jitter(area->max_lsp_lifetime[level - 1], MAX_AGE_JITTER); | |
3f045a08 | 724 | |
d62a17ae | 725 | /* No jitter if the max refresh will be less than configure gen interval |
726 | */ | |
727 | /* N.B. this calucation is acceptable since rem_lifetime is in | |
728 | * [332,65535] at | |
729 | * this point */ | |
730 | if (area->lsp_gen_interval[level - 1] > (rem_lifetime - 300)) | |
731 | rem_lifetime = area->max_lsp_lifetime[level - 1]; | |
3f045a08 | 732 | |
d62a17ae | 733 | return rem_lifetime; |
3f045a08 JB |
734 | } |
735 | ||
d7c0a89a | 736 | static uint16_t lsp_refresh_time(struct isis_lsp *lsp, uint16_t rem_lifetime) |
3f045a08 | 737 | { |
d62a17ae | 738 | struct isis_area *area = lsp->area; |
739 | int level = lsp->level; | |
d7c0a89a | 740 | uint16_t refresh_time; |
3f045a08 | 741 | |
d62a17ae | 742 | /* Add jitter to LSP refresh time */ |
743 | refresh_time = | |
744 | isis_jitter(area->lsp_refresh[level - 1], MAX_LSP_GEN_JITTER); | |
3f045a08 | 745 | |
d62a17ae | 746 | /* RFC 4444 : make sure the refresh time is at least less than 300 |
747 | * of the remaining lifetime and more than gen interval */ | |
748 | if (refresh_time <= area->lsp_gen_interval[level - 1] | |
749 | || refresh_time > (rem_lifetime - 300)) | |
750 | refresh_time = rem_lifetime - 300; | |
3f045a08 | 751 | |
d62a17ae | 752 | /* In cornercases, refresh_time might be <= lsp_gen_interval, however |
753 | * we accept this violation to satisfy refresh_time <= rem_lifetime - | |
754 | * 300 */ | |
3f045a08 | 755 | |
d62a17ae | 756 | return refresh_time; |
3f045a08 JB |
757 | } |
758 | ||
d62a17ae | 759 | static void lsp_build_ext_reach_ipv4(struct isis_lsp *lsp, |
af8ac8f9 | 760 | struct isis_area *area) |
f3ccedaa | 761 | { |
af8ac8f9 | 762 | struct route_table *er_table = get_ext_reach(area, AF_INET, lsp->level); |
d62a17ae | 763 | if (!er_table) |
764 | return; | |
765 | ||
af8ac8f9 CF |
766 | for (struct route_node *rn = route_top(er_table); rn; |
767 | rn = route_next(rn)) { | |
d62a17ae | 768 | if (!rn->info) |
769 | continue; | |
770 | ||
af8ac8f9 CF |
771 | struct prefix_ipv4 *ipv4 = (struct prefix_ipv4 *)&rn->p; |
772 | struct isis_ext_info *info = rn->info; | |
f3ccedaa | 773 | |
af8ac8f9 CF |
774 | uint32_t metric = info->metric; |
775 | if (metric > MAX_WIDE_PATH_METRIC) | |
776 | metric = MAX_WIDE_PATH_METRIC; | |
777 | if (area->oldmetric && metric > 0x3f) | |
778 | metric = 0x3f; | |
d62a17ae | 779 | |
af8ac8f9 CF |
780 | if (area->oldmetric) |
781 | isis_tlvs_add_oldstyle_ip_reach(lsp->tlvs, ipv4, | |
782 | metric); | |
783 | if (area->newmetric) | |
784 | isis_tlvs_add_extended_ip_reach(lsp->tlvs, ipv4, | |
785 | metric); | |
786 | } | |
c3ae3127 CF |
787 | } |
788 | ||
d62a17ae | 789 | static void lsp_build_ext_reach_ipv6(struct isis_lsp *lsp, |
af8ac8f9 | 790 | struct isis_area *area) |
f3ccedaa | 791 | { |
af8ac8f9 CF |
792 | struct route_table *er_table = |
793 | get_ext_reach(area, AF_INET6, lsp->level); | |
d62a17ae | 794 | if (!er_table) |
795 | return; | |
796 | ||
af8ac8f9 | 797 | for (struct route_node *rn = route_top(er_table); rn; |
d43d2df5 | 798 | rn = srcdest_route_next(rn)) { |
d62a17ae | 799 | if (!rn->info) |
800 | continue; | |
af8ac8f9 | 801 | struct isis_ext_info *info = rn->info; |
d62a17ae | 802 | |
d43d2df5 CF |
803 | struct prefix_ipv6 *p, *src_p; |
804 | srcdest_rnode_prefixes(rn, (const struct prefix **)&p, | |
805 | (const struct prefix **)&src_p); | |
806 | ||
af8ac8f9 | 807 | uint32_t metric = info->metric; |
d62a17ae | 808 | if (info->metric > MAX_WIDE_PATH_METRIC) |
af8ac8f9 | 809 | metric = MAX_WIDE_PATH_METRIC; |
d43d2df5 CF |
810 | |
811 | if (!src_p || !src_p->prefixlen) { | |
812 | isis_tlvs_add_ipv6_reach(lsp->tlvs, | |
813 | isis_area_ipv6_topology(area), | |
814 | p, metric); | |
815 | } else if (isis_area_ipv6_dstsrc_enabled(area)) { | |
816 | isis_tlvs_add_ipv6_dstsrc_reach(lsp->tlvs, | |
817 | ISIS_MT_IPV6_DSTSRC, | |
818 | p, src_p, metric); | |
819 | } | |
d62a17ae | 820 | } |
f3ccedaa CF |
821 | } |
822 | ||
af8ac8f9 | 823 | static void lsp_build_ext_reach(struct isis_lsp *lsp, struct isis_area *area) |
f3ccedaa | 824 | { |
af8ac8f9 CF |
825 | lsp_build_ext_reach_ipv4(lsp, area); |
826 | lsp_build_ext_reach_ipv6(lsp, area); | |
827 | } | |
828 | ||
829 | static struct isis_lsp *lsp_next_frag(uint8_t frag_num, struct isis_lsp *lsp0, | |
830 | struct isis_area *area, int level) | |
831 | { | |
832 | struct isis_lsp *lsp; | |
833 | uint8_t frag_id[ISIS_SYS_ID_LEN + 2]; | |
834 | ||
835 | memcpy(frag_id, lsp0->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); | |
836 | LSP_FRAGMENT(frag_id) = frag_num; | |
837 | ||
838 | lsp = lsp_search(frag_id, area->lspdb[level - 1]); | |
839 | if (lsp) { | |
840 | lsp_clear_data(lsp); | |
0b8b6cab CF |
841 | if (!lsp->lspu.zero_lsp) |
842 | lsp_link_fragment(lsp, lsp0); | |
af8ac8f9 CF |
843 | return lsp; |
844 | } | |
845 | ||
846 | lsp = lsp_new(area, frag_id, lsp0->hdr.rem_lifetime, 0, | |
847 | lsp_bits_generate(level, area->overload_bit, | |
848 | area->attached_bit), | |
8f5dbe18 | 849 | 0, lsp0, level); |
af8ac8f9 CF |
850 | lsp->own_lsp = 1; |
851 | lsp_insert(lsp, area->lspdb[level - 1]); | |
af8ac8f9 | 852 | return lsp; |
f3ccedaa CF |
853 | } |
854 | ||
eb5d44eb | 855 | /* |
d62a17ae | 856 | * Builds the LSP data part. This func creates a new frag whenever |
eb5d44eb | 857 | * area->lsp_frag_threshold is exceeded. |
858 | */ | |
d62a17ae | 859 | static void lsp_build(struct isis_lsp *lsp, struct isis_area *area) |
eb5d44eb | 860 | { |
d62a17ae | 861 | int level = lsp->level; |
af8ac8f9 CF |
862 | char buf[PREFIX2STR_BUFFER]; |
863 | struct listnode *node; | |
864 | struct isis_lsp *frag; | |
865 | ||
866 | lsp_clear_data(lsp); | |
867 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) | |
868 | lsp_clear_data(frag); | |
d62a17ae | 869 | |
af8ac8f9 | 870 | lsp->tlvs = isis_alloc_tlvs(); |
d62a17ae | 871 | lsp_debug("ISIS (%s): Constructing local system LSP for level %d", |
872 | area->area_tag, level); | |
873 | ||
af8ac8f9 CF |
874 | lsp->hdr.lsp_bits = lsp_bits_generate(level, area->overload_bit, |
875 | area->attached_bit); | |
d62a17ae | 876 | |
af8ac8f9 | 877 | lsp_add_auth(lsp); |
d62a17ae | 878 | |
af8ac8f9 | 879 | isis_tlvs_add_area_addresses(lsp->tlvs, area->area_addrs); |
d62a17ae | 880 | |
881 | /* Protocols Supported */ | |
882 | if (area->ip_circuits > 0 || area->ipv6_circuits > 0) { | |
af8ac8f9 | 883 | struct nlpids nlpids = {.count = 0}; |
d62a17ae | 884 | if (area->ip_circuits > 0) { |
885 | lsp_debug( | |
886 | "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs", | |
887 | area->area_tag); | |
af8ac8f9 CF |
888 | nlpids.nlpids[nlpids.count] = NLPID_IP; |
889 | nlpids.count++; | |
d62a17ae | 890 | } |
891 | if (area->ipv6_circuits > 0) { | |
892 | lsp_debug( | |
893 | "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs", | |
894 | area->area_tag); | |
af8ac8f9 CF |
895 | nlpids.nlpids[nlpids.count] = NLPID_IPV6; |
896 | nlpids.count++; | |
d62a17ae | 897 | } |
af8ac8f9 | 898 | isis_tlvs_set_protocols_supported(lsp->tlvs, &nlpids); |
d62a17ae | 899 | } |
900 | ||
901 | if (area_is_mt(area)) { | |
902 | lsp_debug("ISIS (%s): Adding MT router tlv...", area->area_tag); | |
d62a17ae | 903 | |
904 | struct isis_area_mt_setting **mt_settings; | |
905 | unsigned int mt_count; | |
906 | ||
907 | mt_settings = area_mt_settings(area, &mt_count); | |
908 | for (unsigned int i = 0; i < mt_count; i++) { | |
af8ac8f9 CF |
909 | isis_tlvs_add_mt_router_info( |
910 | lsp->tlvs, mt_settings[i]->mtid, | |
911 | mt_settings[i]->overload, false); | |
d62a17ae | 912 | lsp_debug("ISIS (%s): MT %s", area->area_tag, |
af8ac8f9 | 913 | isis_mtid2str(mt_settings[i]->mtid)); |
aa4376ec | 914 | } |
d62a17ae | 915 | } else { |
916 | lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)", | |
917 | area->area_tag); | |
918 | } | |
919 | /* Dynamic Hostname */ | |
920 | if (area->dynhostname) { | |
6b3ee3a0 | 921 | isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get()); |
af8ac8f9 | 922 | lsp_debug("ISIS (%s): Adding dynamic hostname '%s'", |
6b3ee3a0 | 923 | area->area_tag, cmd_hostname_get()); |
d62a17ae | 924 | } else { |
925 | lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)", | |
926 | area->area_tag); | |
927 | } | |
928 | ||
929 | /* IPv4 address and TE router ID TLVs. In case of the first one we don't | |
930 | * follow "C" vendor, but "J" vendor behavior - one IPv4 address is put | |
931 | * into | |
932 | * LSP and this address is same as router id. */ | |
933 | if (isis->router_id != 0) { | |
af8ac8f9 CF |
934 | struct in_addr id = {.s_addr = isis->router_id}; |
935 | inet_ntop(AF_INET, &id, buf, sizeof(buf)); | |
d62a17ae | 936 | lsp_debug("ISIS (%s): Adding router ID %s as IPv4 tlv.", |
937 | area->area_tag, buf); | |
af8ac8f9 | 938 | isis_tlvs_add_ipv4_address(lsp->tlvs, &id); |
d62a17ae | 939 | |
940 | /* Exactly same data is put into TE router ID TLV, but only if | |
941 | * new style | |
942 | * TLV's are in use. */ | |
943 | if (area->newmetric) { | |
af8ac8f9 | 944 | |
d62a17ae | 945 | lsp_debug( |
946 | "ISIS (%s): Adding router ID also as TE router ID tlv.", | |
947 | area->area_tag); | |
af8ac8f9 | 948 | isis_tlvs_set_te_router_id(lsp->tlvs, &id); |
aa4376ec | 949 | } |
d62a17ae | 950 | } else { |
951 | lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.", | |
952 | area->area_tag); | |
953 | } | |
954 | ||
d62a17ae | 955 | lsp_debug("ISIS (%s): Adding circuit specific information.", |
956 | area->area_tag); | |
957 | ||
92ed0cde CF |
958 | if (fabricd) { |
959 | lsp_debug( | |
960 | "ISIS (%s): Adding tier %" PRIu8 " spine-leaf-extension tlv.", | |
961 | area->area_tag, fabricd_tier(area)); | |
962 | isis_tlvs_add_spine_leaf(lsp->tlvs, fabricd_tier(area), true, | |
963 | false, false, false); | |
964 | } | |
965 | ||
af8ac8f9 | 966 | struct isis_circuit *circuit; |
d62a17ae | 967 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit)) { |
968 | if (!circuit->interface) | |
969 | lsp_debug( | |
970 | "ISIS (%s): Processing %s circuit %p with unknown interface", | |
971 | area->area_tag, | |
972 | circuit_type2string(circuit->circ_type), | |
973 | circuit); | |
974 | else | |
975 | lsp_debug("ISIS (%s): Processing %s circuit %s", | |
976 | area->area_tag, | |
977 | circuit_type2string(circuit->circ_type), | |
978 | circuit->interface->name); | |
979 | ||
980 | if (circuit->state != C_STATE_UP) { | |
981 | lsp_debug("ISIS (%s): Circuit is not up, ignoring.", | |
982 | area->area_tag); | |
983 | continue; | |
aa4376ec | 984 | } |
d62a17ae | 985 | |
af8ac8f9 CF |
986 | uint32_t metric = area->oldmetric |
987 | ? circuit->metric[level - 1] | |
988 | : circuit->te_metric[level - 1]; | |
989 | ||
d62a17ae | 990 | if (circuit->ip_router && circuit->ip_addrs |
991 | && circuit->ip_addrs->count > 0) { | |
992 | lsp_debug( | |
993 | "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.", | |
994 | area->area_tag); | |
af8ac8f9 CF |
995 | struct listnode *ipnode; |
996 | struct prefix_ipv4 *ipv4; | |
997 | for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, ipnode, | |
998 | ipv4)) { | |
999 | if (area->oldmetric) { | |
d62a17ae | 1000 | lsp_debug( |
af8ac8f9 CF |
1001 | "ISIS (%s): Adding old-style IP reachability for %s", |
1002 | area->area_tag, | |
1003 | prefix2str(ipv4, buf, | |
1004 | sizeof(buf))); | |
1005 | isis_tlvs_add_oldstyle_ip_reach( | |
1006 | lsp->tlvs, ipv4, metric); | |
d62a17ae | 1007 | } |
af8ac8f9 CF |
1008 | |
1009 | if (area->newmetric) { | |
d62a17ae | 1010 | lsp_debug( |
af8ac8f9 CF |
1011 | "ISIS (%s): Adding te-style IP reachability for %s", |
1012 | area->area_tag, | |
1013 | prefix2str(ipv4, buf, | |
1014 | sizeof(buf))); | |
1015 | isis_tlvs_add_extended_ip_reach( | |
1016 | lsp->tlvs, ipv4, metric); | |
d62a17ae | 1017 | } |
1018 | } | |
f390d2c7 | 1019 | } |
d62a17ae | 1020 | |
d62a17ae | 1021 | if (circuit->ipv6_router && circuit->ipv6_non_link |
1022 | && circuit->ipv6_non_link->count > 0) { | |
af8ac8f9 CF |
1023 | struct listnode *ipnode; |
1024 | struct prefix_ipv6 *ipv6; | |
d62a17ae | 1025 | for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, |
1026 | ipnode, ipv6)) { | |
d62a17ae | 1027 | lsp_debug( |
af8ac8f9 CF |
1028 | "ISIS (%s): Adding IPv6 reachability for %s", |
1029 | area->area_tag, | |
1030 | prefix2str(ipv6, buf, sizeof(buf))); | |
1031 | isis_tlvs_add_ipv6_reach( | |
1032 | lsp->tlvs, | |
1033 | isis_area_ipv6_topology(area), ipv6, | |
1034 | metric); | |
d62a17ae | 1035 | } |
aa4376ec | 1036 | } |
d62a17ae | 1037 | |
1038 | switch (circuit->circ_type) { | |
1039 | case CIRCUIT_T_BROADCAST: | |
1040 | if (level & circuit->is_type) { | |
af8ac8f9 CF |
1041 | uint8_t *ne_id = |
1042 | (level == IS_LEVEL_1) | |
1043 | ? circuit->u.bc.l1_desig_is | |
1044 | : circuit->u.bc.l2_desig_is; | |
1045 | ||
1046 | if (LSP_PSEUDO_ID(ne_id)) { | |
1047 | if (area->oldmetric) { | |
d62a17ae | 1048 | lsp_debug( |
1049 | "ISIS (%s): Adding DIS %s.%02x as old-style neighbor", | |
1050 | area->area_tag, | |
af8ac8f9 CF |
1051 | sysid_print(ne_id), |
1052 | LSP_PSEUDO_ID(ne_id)); | |
1053 | isis_tlvs_add_oldstyle_reach( | |
1054 | lsp->tlvs, ne_id, | |
1055 | metric); | |
d62a17ae | 1056 | } |
af8ac8f9 CF |
1057 | if (area->newmetric) { |
1058 | uint8_t subtlvs[256]; | |
1059 | uint8_t subtlv_len; | |
1060 | ||
d62a17ae | 1061 | if (IS_MPLS_TE(isisMplsTE) |
7968405d | 1062 | && circuit->interface |
d62a17ae | 1063 | && HAS_LINK_PARAMS( |
1064 | circuit->interface)) | |
af8ac8f9 CF |
1065 | subtlv_len = add_te_subtlvs( |
1066 | subtlvs, | |
d62a17ae | 1067 | circuit->mtc); |
1068 | else | |
af8ac8f9 | 1069 | subtlv_len = 0; |
d62a17ae | 1070 | |
1071 | tlvs_add_mt_bcast( | |
af8ac8f9 CF |
1072 | lsp->tlvs, circuit, |
1073 | level, ne_id, metric, | |
1074 | subtlvs, subtlv_len); | |
d62a17ae | 1075 | } |
1076 | } | |
1077 | } else { | |
1078 | lsp_debug( | |
1079 | "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors", | |
1080 | area->area_tag); | |
1081 | } | |
1082 | break; | |
af8ac8f9 CF |
1083 | case CIRCUIT_T_P2P: { |
1084 | struct isis_adjacency *nei = circuit->u.p2p.neighbor; | |
44b89511 CF |
1085 | if (nei && nei->adj_state == ISIS_ADJ_UP |
1086 | && (level & nei->circuit_t)) { | |
af8ac8f9 CF |
1087 | uint8_t ne_id[7]; |
1088 | memcpy(ne_id, nei->sysid, ISIS_SYS_ID_LEN); | |
1089 | LSP_PSEUDO_ID(ne_id) = 0; | |
1090 | ||
d62a17ae | 1091 | if (area->oldmetric) { |
d62a17ae | 1092 | lsp_debug( |
1093 | "ISIS (%s): Adding old-style is reach for %s", | |
1094 | area->area_tag, | |
af8ac8f9 CF |
1095 | sysid_print(ne_id)); |
1096 | isis_tlvs_add_oldstyle_reach( | |
1097 | lsp->tlvs, ne_id, metric); | |
d62a17ae | 1098 | } |
1099 | if (area->newmetric) { | |
af8ac8f9 CF |
1100 | uint8_t subtlvs[256]; |
1101 | uint8_t subtlv_len; | |
d62a17ae | 1102 | |
d62a17ae | 1103 | if (IS_MPLS_TE(isisMplsTE) |
c46df787 | 1104 | && circuit->interface != NULL |
d62a17ae | 1105 | && HAS_LINK_PARAMS( |
1106 | circuit->interface)) | |
1107 | /* Update Local and Remote IP | |
1108 | * address for MPLS TE circuit | |
1109 | * parameters */ | |
1110 | /* NOTE sure that it is the | |
1111 | * pertinent place for that | |
1112 | * updates */ | |
1113 | /* Local IP address could be | |
1114 | * updated in isis_circuit.c - | |
1115 | * isis_circuit_add_addr() */ | |
1116 | /* But, where update remote IP | |
1117 | * address ? in isis_pdu.c - | |
1118 | * process_p2p_hello() ? */ | |
1119 | ||
1120 | /* Add SubTLVs & Adjust real | |
1121 | * size of SubTLVs */ | |
af8ac8f9 CF |
1122 | subtlv_len = add_te_subtlvs( |
1123 | subtlvs, circuit->mtc); | |
d62a17ae | 1124 | else |
1125 | /* Or keep only TE metric with | |
1126 | * no SubTLVs if MPLS_TE is off | |
1127 | */ | |
af8ac8f9 | 1128 | subtlv_len = 0; |
d62a17ae | 1129 | |
a191178d CF |
1130 | uint32_t neighbor_metric; |
1131 | if (fabricd_tier(area) == 0) { | |
1132 | neighbor_metric = 0xffe; | |
1133 | } else { | |
1134 | neighbor_metric = metric; | |
1135 | } | |
1136 | ||
af8ac8f9 | 1137 | tlvs_add_mt_p2p(lsp->tlvs, circuit, |
a191178d CF |
1138 | ne_id, neighbor_metric, |
1139 | subtlvs, subtlv_len); | |
d62a17ae | 1140 | } |
1141 | } else { | |
1142 | lsp_debug( | |
1143 | "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors", | |
1144 | area->area_tag); | |
1145 | } | |
af8ac8f9 | 1146 | } break; |
d62a17ae | 1147 | case CIRCUIT_T_LOOPBACK: |
1148 | break; | |
1149 | default: | |
1150 | zlog_warn("lsp_area_create: unknown circuit type"); | |
aa4376ec | 1151 | } |
d62a17ae | 1152 | } |
1153 | ||
af8ac8f9 | 1154 | lsp_build_ext_reach(lsp, area); |
d62a17ae | 1155 | |
af8ac8f9 CF |
1156 | struct isis_tlvs *tlvs = lsp->tlvs; |
1157 | lsp->tlvs = NULL; | |
d62a17ae | 1158 | |
d07067ba | 1159 | lsp_adjust_stream(lsp); |
af8ac8f9 CF |
1160 | lsp_pack_pdu(lsp); |
1161 | size_t tlv_space = STREAM_WRITEABLE(lsp->pdu) - LLC_LEN; | |
1162 | lsp_clear_data(lsp); | |
d62a17ae | 1163 | |
af8ac8f9 CF |
1164 | struct list *fragments = isis_fragment_tlvs(tlvs, tlv_space); |
1165 | if (!fragments) { | |
1166 | zlog_warn("BUG: could not fragment own LSP:"); | |
996c9314 LB |
1167 | log_multiline(LOG_WARNING, " ", "%s", |
1168 | isis_format_tlvs(tlvs)); | |
af8ac8f9 CF |
1169 | isis_free_tlvs(tlvs); |
1170 | return; | |
d62a17ae | 1171 | } |
af8ac8f9 | 1172 | isis_free_tlvs(tlvs); |
d62a17ae | 1173 | |
789c4dfc | 1174 | bool fragment_overflow = false; |
af8ac8f9 CF |
1175 | frag = lsp; |
1176 | for (ALL_LIST_ELEMENTS_RO(fragments, node, tlvs)) { | |
1177 | if (node != listhead(fragments)) { | |
789c4dfc CF |
1178 | if (LSP_FRAGMENT(frag->hdr.lsp_id) == 255) { |
1179 | if (!fragment_overflow) { | |
1180 | fragment_overflow = true; | |
996c9314 LB |
1181 | zlog_warn( |
1182 | "ISIS (%s): Too much information for 256 fragments", | |
1183 | area->area_tag); | |
789c4dfc CF |
1184 | } |
1185 | isis_free_tlvs(tlvs); | |
1186 | continue; | |
1187 | } | |
1188 | ||
af8ac8f9 CF |
1189 | frag = lsp_next_frag(LSP_FRAGMENT(frag->hdr.lsp_id) + 1, |
1190 | lsp, area, level); | |
d07067ba | 1191 | lsp_adjust_stream(frag); |
d62a17ae | 1192 | } |
af8ac8f9 | 1193 | frag->tlvs = tlvs; |
d62a17ae | 1194 | } |
1195 | ||
6a154c88 | 1196 | list_delete(&fragments); |
af8ac8f9 CF |
1197 | lsp_debug("ISIS (%s): LSP construction is complete. Serializing...", |
1198 | area->area_tag); | |
d62a17ae | 1199 | return; |
eb5d44eb | 1200 | } |
eb5d44eb | 1201 | |
1202 | /* | |
3f045a08 | 1203 | * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs |
eb5d44eb | 1204 | */ |
d62a17ae | 1205 | int lsp_generate(struct isis_area *area, int level) |
f390d2c7 | 1206 | { |
d62a17ae | 1207 | struct isis_lsp *oldlsp, *newlsp; |
d7c0a89a QY |
1208 | uint32_t seq_num = 0; |
1209 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1210 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1211 | |
1212 | if ((area == NULL) || (area->is_type & level) != level) | |
1213 | return ISIS_ERROR; | |
1214 | ||
1215 | memset(&lspid, 0, ISIS_SYS_ID_LEN + 2); | |
1216 | memcpy(&lspid, isis->sysid, ISIS_SYS_ID_LEN); | |
1217 | ||
1218 | /* only builds the lsp if the area shares the level */ | |
1219 | oldlsp = lsp_search(lspid, area->lspdb[level - 1]); | |
1220 | if (oldlsp) { | |
1221 | /* FIXME: we should actually initiate a purge */ | |
af8ac8f9 CF |
1222 | seq_num = oldlsp->hdr.seqno; |
1223 | lsp_search_and_destroy(oldlsp->hdr.lsp_id, | |
d62a17ae | 1224 | area->lspdb[level - 1]); |
1225 | } | |
1226 | rem_lifetime = lsp_rem_lifetime(area, level); | |
1227 | newlsp = | |
1228 | lsp_new(area, lspid, rem_lifetime, seq_num, | |
1229 | area->is_type | area->overload_bit | area->attached_bit, | |
8f5dbe18 | 1230 | 0, NULL, level); |
d62a17ae | 1231 | newlsp->area = area; |
1232 | newlsp->own_lsp = 1; | |
1233 | ||
1234 | lsp_insert(newlsp, area->lspdb[level - 1]); | |
1235 | /* build_lsp_data (newlsp, area); */ | |
1236 | lsp_build(newlsp, area); | |
1237 | /* time to calculate our checksum */ | |
af8ac8f9 | 1238 | lsp_seqno_update(newlsp); |
d62a17ae | 1239 | newlsp->last_generated = time(NULL); |
9b39405f | 1240 | lsp_flood(newlsp, NULL); |
d62a17ae | 1241 | |
1242 | refresh_time = lsp_refresh_time(newlsp, rem_lifetime); | |
1243 | ||
1244 | THREAD_TIMER_OFF(area->t_lsp_refresh[level - 1]); | |
1245 | area->lsp_regenerate_pending[level - 1] = 0; | |
9196731f CF |
1246 | thread_add_timer(master, lsp_refresh, |
1247 | &area->lsp_refresh_arg[level - 1], refresh_time, | |
1248 | &area->t_lsp_refresh[level - 1]); | |
d62a17ae | 1249 | |
1250 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
af8ac8f9 CF |
1251 | zlog_debug("ISIS-Upd (%s): Building L%d LSP %s, len %" PRIu16 |
1252 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1253 | ", lifetime %" PRIu16 "s refresh %" PRIu16 "s", | |
1254 | area->area_tag, level, | |
1255 | rawlspid_print(newlsp->hdr.lsp_id), | |
1256 | newlsp->hdr.pdu_len, newlsp->hdr.seqno, | |
1257 | newlsp->hdr.checksum, newlsp->hdr.rem_lifetime, | |
1258 | refresh_time); | |
d62a17ae | 1259 | } |
1260 | sched_debug( | |
1261 | "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.", | |
1262 | area->area_tag, level); | |
1263 | ||
1264 | return ISIS_OK; | |
eb5d44eb | 1265 | } |
1266 | ||
1267 | /* | |
9b39405f | 1268 | * Search own LSPs, update holding time and flood |
eb5d44eb | 1269 | */ |
d62a17ae | 1270 | static int lsp_regenerate(struct isis_area *area, int level) |
eb5d44eb | 1271 | { |
d62a17ae | 1272 | dict_t *lspdb; |
1273 | struct isis_lsp *lsp, *frag; | |
1274 | struct listnode *node; | |
d7c0a89a QY |
1275 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; |
1276 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1277 | |
1278 | if ((area == NULL) || (area->is_type & level) != level) | |
1279 | return ISIS_ERROR; | |
1280 | ||
1281 | lspdb = area->lspdb[level - 1]; | |
1282 | ||
1283 | memset(lspid, 0, ISIS_SYS_ID_LEN + 2); | |
1284 | memcpy(lspid, isis->sysid, ISIS_SYS_ID_LEN); | |
1285 | ||
1286 | lsp = lsp_search(lspid, lspdb); | |
1287 | ||
1288 | if (!lsp) { | |
450971aa | 1289 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 QY |
1290 | "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!", |
1291 | area->area_tag, level); | |
d62a17ae | 1292 | return ISIS_ERROR; |
1293 | } | |
1294 | ||
1295 | lsp_clear_data(lsp); | |
1296 | lsp_build(lsp, area); | |
d62a17ae | 1297 | rem_lifetime = lsp_rem_lifetime(area, level); |
af8ac8f9 | 1298 | lsp->hdr.rem_lifetime = rem_lifetime; |
d62a17ae | 1299 | lsp->last_generated = time(NULL); |
9b39405f | 1300 | lsp_flood(lsp, NULL); |
d62a17ae | 1301 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { |
8f27aa27 CF |
1302 | if (!frag->tlvs) { |
1303 | /* Updating and flooding should only affect fragments | |
1304 | * carrying data | |
1305 | */ | |
1306 | continue; | |
1307 | } | |
1308 | ||
af8ac8f9 | 1309 | frag->hdr.lsp_bits = lsp_bits_generate( |
d62a17ae | 1310 | level, area->overload_bit, area->attached_bit); |
1311 | /* Set the lifetime values of all the fragments to the same | |
1312 | * value, | |
1313 | * so that no fragment expires before the lsp is refreshed. | |
1314 | */ | |
af8ac8f9 | 1315 | frag->hdr.rem_lifetime = rem_lifetime; |
0b8b6cab | 1316 | frag->age_out = ZERO_AGE_LIFETIME; |
9b39405f | 1317 | lsp_flood(frag, NULL); |
d62a17ae | 1318 | } |
af8ac8f9 | 1319 | lsp_seqno_update(lsp); |
d62a17ae | 1320 | |
1321 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
9196731f CF |
1322 | thread_add_timer(master, lsp_refresh, |
1323 | &area->lsp_refresh_arg[level - 1], refresh_time, | |
1324 | &area->t_lsp_refresh[level - 1]); | |
d62a17ae | 1325 | area->lsp_regenerate_pending[level - 1] = 0; |
1326 | ||
1327 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1328 | zlog_debug( | |
af8ac8f9 CF |
1329 | "ISIS-Upd (%s): Refreshed our L%d LSP %s, len %" PRIu16 |
1330 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1331 | ", lifetime %" PRIu16 "s refresh %" PRIu16 "s", | |
1332 | area->area_tag, level, rawlspid_print(lsp->hdr.lsp_id), | |
1333 | lsp->hdr.pdu_len, lsp->hdr.seqno, lsp->hdr.checksum, | |
1334 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1335 | } |
1336 | sched_debug( | |
1337 | "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.", | |
1338 | area->area_tag, level); | |
1339 | ||
1340 | return ISIS_OK; | |
eb5d44eb | 1341 | } |
1342 | ||
eb5d44eb | 1343 | /* |
3f045a08 | 1344 | * Something has changed or periodic refresh -> regenerate LSP |
eb5d44eb | 1345 | */ |
9196731f | 1346 | static int lsp_refresh(struct thread *thread) |
eb5d44eb | 1347 | { |
9196731f | 1348 | struct lsp_refresh_arg *arg = THREAD_ARG(thread); |
d70f99e1 | 1349 | |
9196731f | 1350 | assert(arg); |
eb5d44eb | 1351 | |
9196731f | 1352 | struct isis_area *area = arg->area; |
eb5d44eb | 1353 | |
d62a17ae | 1354 | assert(area); |
f390d2c7 | 1355 | |
9196731f | 1356 | int level = arg->level; |
f390d2c7 | 1357 | |
9196731f CF |
1358 | area->t_lsp_refresh[level - 1] = NULL; |
1359 | area->lsp_regenerate_pending[level - 1] = 0; | |
1360 | ||
1361 | if ((area->is_type & level) == 0) | |
d62a17ae | 1362 | return ISIS_ERROR; |
3f045a08 | 1363 | |
01c3745f | 1364 | if (monotime_since(&area->last_lsp_refresh_event[level - 1], NULL) < 100000L) { |
f93025e1 CF |
1365 | sched_debug("ISIS (%s): Still unstable, postpone LSP L%d refresh", |
1366 | area->area_tag, level); | |
1367 | _lsp_regenerate_schedule(area, level, 0, false, | |
1368 | __func__, __FILE__, __LINE__); | |
1369 | return 0; | |
1370 | } | |
1371 | ||
d62a17ae | 1372 | sched_debug( |
9196731f CF |
1373 | "ISIS (%s): LSP L%d refresh timer expired. Refreshing LSP...", |
1374 | area->area_tag, level); | |
1375 | return lsp_regenerate(area, level); | |
eb5d44eb | 1376 | } |
1377 | ||
691f3e76 | 1378 | int _lsp_regenerate_schedule(struct isis_area *area, int level, |
f93025e1 CF |
1379 | int all_pseudo, bool postpone, |
1380 | const char *func, const char *file, | |
1381 | int line) | |
eb5d44eb | 1382 | { |
d62a17ae | 1383 | struct isis_lsp *lsp; |
d7c0a89a | 1384 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1385 | time_t now, diff; |
1386 | long timeout; | |
1387 | struct listnode *cnode; | |
1388 | struct isis_circuit *circuit; | |
1389 | int lvl; | |
1390 | ||
1391 | if (area == NULL) | |
1392 | return ISIS_ERROR; | |
1393 | ||
1394 | sched_debug( | |
691f3e76 CF |
1395 | "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs" |
1396 | " Caller: %s %s:%d", | |
d62a17ae | 1397 | area->area_tag, circuit_t2string(level), |
691f3e76 CF |
1398 | all_pseudo ? "" : "not ", |
1399 | func, file, line); | |
d62a17ae | 1400 | |
1401 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1402 | LSP_PSEUDO_ID(id) = LSP_FRAGMENT(id) = 0; | |
1403 | now = time(NULL); | |
1404 | ||
1405 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1406 | if (!((level & lvl) && (area->is_type & lvl))) | |
1407 | continue; | |
1408 | ||
f93025e1 CF |
1409 | if (postpone) { |
1410 | monotime(&area->last_lsp_refresh_event[lvl - 1]); | |
1411 | } | |
1412 | ||
d62a17ae | 1413 | sched_debug( |
1414 | "ISIS (%s): Checking whether L%d needs to be scheduled", | |
1415 | area->area_tag, lvl); | |
1416 | ||
1417 | if (area->lsp_regenerate_pending[lvl - 1]) { | |
1418 | struct timeval remain = thread_timer_remain( | |
1419 | area->t_lsp_refresh[lvl - 1]); | |
1420 | sched_debug( | |
1421 | "ISIS (%s): Regeneration is already pending, nothing todo." | |
1422 | " (Due in %lld.%03lld seconds)", | |
1423 | area->area_tag, (long long)remain.tv_sec, | |
1424 | (long long)remain.tv_usec / 1000); | |
1425 | continue; | |
1426 | } | |
1427 | ||
1428 | lsp = lsp_search(id, area->lspdb[lvl - 1]); | |
1429 | if (!lsp) { | |
1430 | sched_debug( | |
1431 | "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.", | |
1432 | area->area_tag); | |
1433 | continue; | |
1434 | } | |
1435 | ||
1436 | /* | |
1437 | * Throttle avoidance | |
1438 | */ | |
1439 | sched_debug( | |
1440 | "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld", | |
1441 | area->area_tag, (long long)lsp->last_generated, | |
1442 | (long long)now); | |
1443 | THREAD_TIMER_OFF(area->t_lsp_refresh[lvl - 1]); | |
1444 | diff = now - lsp->last_generated; | |
1445 | if (diff < area->lsp_gen_interval[lvl - 1]) { | |
1446 | timeout = | |
1447 | 1000 * (area->lsp_gen_interval[lvl - 1] - diff); | |
1448 | sched_debug( | |
1449 | "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval", | |
1450 | area->area_tag, timeout); | |
1451 | } else { | |
1452 | /* | |
1453 | * lsps are not regenerated if lsp_regenerate function | |
1454 | * is called | |
1455 | * directly. However if the lsp_regenerate call is | |
1456 | * queued for | |
1457 | * later execution it works. | |
1458 | */ | |
1459 | timeout = 100; | |
1460 | sched_debug( | |
1461 | "ISIS (%s): Last generation was more than lsp_gen_interval ago." | |
1462 | " Scheduling for execution in %ld ms.", | |
1463 | area->area_tag, timeout); | |
1464 | } | |
1465 | ||
1466 | area->lsp_regenerate_pending[lvl - 1] = 1; | |
9196731f CF |
1467 | thread_add_timer_msec(master, lsp_refresh, |
1468 | &area->lsp_refresh_arg[lvl - 1], | |
1469 | timeout, | |
1470 | &area->t_lsp_refresh[lvl - 1]); | |
d62a17ae | 1471 | } |
1472 | ||
1473 | if (all_pseudo) { | |
1474 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, cnode, circuit)) | |
1475 | lsp_regenerate_schedule_pseudo(circuit, level); | |
1476 | } | |
1477 | ||
1478 | return ISIS_OK; | |
eb5d44eb | 1479 | } |
1480 | ||
1481 | /* | |
1482 | * Funcs for pseudonode LSPs | |
1483 | */ | |
1484 | ||
1485 | /* | |
d62a17ae | 1486 | * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs |
eb5d44eb | 1487 | */ |
d62a17ae | 1488 | static void lsp_build_pseudo(struct isis_lsp *lsp, struct isis_circuit *circuit, |
1489 | int level) | |
eb5d44eb | 1490 | { |
d62a17ae | 1491 | struct isis_adjacency *adj; |
d62a17ae | 1492 | struct list *adj_list; |
1493 | struct listnode *node; | |
1494 | struct isis_area *area = circuit->area; | |
1495 | ||
af8ac8f9 CF |
1496 | lsp_clear_data(lsp); |
1497 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 1498 | lsp_debug( |
1499 | "ISIS (%s): Constructing pseudo LSP %s for interface %s level %d", | |
af8ac8f9 | 1500 | area->area_tag, rawlspid_print(lsp->hdr.lsp_id), |
d62a17ae | 1501 | circuit->interface->name, level); |
1502 | ||
1503 | lsp->level = level; | |
1504 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
af8ac8f9 | 1505 | lsp->hdr.lsp_bits = |
d62a17ae | 1506 | lsp_bits_generate(level, 0, circuit->area->attached_bit); |
1507 | ||
1508 | /* | |
1509 | * add self to IS neighbours | |
1510 | */ | |
af8ac8f9 CF |
1511 | uint8_t ne_id[ISIS_SYS_ID_LEN + 1]; |
1512 | ||
1513 | memcpy(ne_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1514 | LSP_PSEUDO_ID(ne_id) = 0; | |
d62a17ae | 1515 | |
af8ac8f9 CF |
1516 | if (circuit->area->oldmetric) { |
1517 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
d62a17ae | 1518 | lsp_debug( |
1519 | "ISIS (%s): Adding %s.%02x as old-style neighbor (self)", | |
af8ac8f9 CF |
1520 | area->area_tag, sysid_print(ne_id), |
1521 | LSP_PSEUDO_ID(ne_id)); | |
d62a17ae | 1522 | } |
1523 | if (circuit->area->newmetric) { | |
af8ac8f9 CF |
1524 | isis_tlvs_add_extended_reach(lsp->tlvs, ISIS_MT_IPV4_UNICAST, |
1525 | ne_id, 0, NULL, 0); | |
d62a17ae | 1526 | lsp_debug( |
1527 | "ISIS (%s): Adding %s.%02x as te-style neighbor (self)", | |
af8ac8f9 CF |
1528 | area->area_tag, sysid_print(ne_id), |
1529 | LSP_PSEUDO_ID(ne_id)); | |
d62a17ae | 1530 | } |
1531 | ||
1532 | adj_list = list_new(); | |
1533 | isis_adj_build_up_list(circuit->u.bc.adjdb[level - 1], adj_list); | |
1534 | ||
1535 | for (ALL_LIST_ELEMENTS_RO(adj_list, node, adj)) { | |
af8ac8f9 | 1536 | if (!(adj->level & level)) { |
d62a17ae | 1537 | lsp_debug( |
1538 | "ISIS (%s): Ignoring neighbor %s, level does not intersect", | |
1539 | area->area_tag, sysid_print(adj->sysid)); | |
af8ac8f9 | 1540 | continue; |
f390d2c7 | 1541 | } |
d62a17ae | 1542 | |
af8ac8f9 CF |
1543 | if (!(level == IS_LEVEL_1 |
1544 | && adj->sys_type == ISIS_SYSTYPE_L1_IS) | |
1545 | && !(level == IS_LEVEL_1 | |
1546 | && adj->sys_type == ISIS_SYSTYPE_L2_IS | |
1547 | && adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
1548 | && !(level == IS_LEVEL_2 | |
1549 | && adj->sys_type == ISIS_SYSTYPE_L2_IS)) { | |
1550 | lsp_debug( | |
1551 | "ISIS (%s): Ignoring neighbor %s, level does not match", | |
1552 | area->area_tag, sysid_print(adj->sysid)); | |
1553 | continue; | |
1554 | } | |
d62a17ae | 1555 | |
af8ac8f9 CF |
1556 | memcpy(ne_id, adj->sysid, ISIS_SYS_ID_LEN); |
1557 | if (circuit->area->oldmetric) { | |
1558 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
1559 | lsp_debug( | |
1560 | "ISIS (%s): Adding %s.%02x as old-style neighbor (peer)", | |
1561 | area->area_tag, sysid_print(ne_id), | |
1562 | LSP_PSEUDO_ID(ne_id)); | |
1563 | } | |
1564 | if (circuit->area->newmetric) { | |
1565 | isis_tlvs_add_extended_reach(lsp->tlvs, | |
1566 | ISIS_MT_IPV4_UNICAST, | |
1567 | ne_id, 0, NULL, 0); | |
1568 | lsp_debug( | |
1569 | "ISIS (%s): Adding %s.%02x as te-style neighbor (peer)", | |
1570 | area->area_tag, sysid_print(ne_id), | |
1571 | LSP_PSEUDO_ID(ne_id)); | |
1572 | } | |
1573 | } | |
6a154c88 | 1574 | list_delete(&adj_list); |
d62a17ae | 1575 | return; |
eb5d44eb | 1576 | } |
1577 | ||
d62a17ae | 1578 | int lsp_generate_pseudo(struct isis_circuit *circuit, int level) |
3f045a08 | 1579 | { |
d62a17ae | 1580 | dict_t *lspdb = circuit->area->lspdb[level - 1]; |
1581 | struct isis_lsp *lsp; | |
d7c0a89a QY |
1582 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
1583 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1584 | |
1585 | if ((circuit->is_type & level) != level | |
1586 | || (circuit->state != C_STATE_UP) | |
1587 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1588 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1589 | return ISIS_ERROR; | |
1590 | ||
1591 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1592 | LSP_FRAGMENT(lsp_id) = 0; | |
1593 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1594 | ||
1595 | /* | |
1596 | * If for some reason have a pseudo LSP in the db already -> regenerate | |
1597 | */ | |
1598 | if (lsp_search(lsp_id, lspdb)) | |
1599 | return lsp_regenerate_schedule_pseudo(circuit, level); | |
1600 | ||
1601 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); | |
1602 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
1603 | lsp = lsp_new(circuit->area, lsp_id, rem_lifetime, 1, | |
1604 | circuit->area->is_type | circuit->area->attached_bit, 0, | |
8f5dbe18 | 1605 | NULL, level); |
d62a17ae | 1606 | lsp->area = circuit->area; |
1607 | ||
1608 | lsp_build_pseudo(lsp, circuit, level); | |
af8ac8f9 | 1609 | lsp_pack_pdu(lsp); |
d62a17ae | 1610 | lsp->own_lsp = 1; |
1611 | lsp_insert(lsp, lspdb); | |
9b39405f | 1612 | lsp_flood(lsp, NULL); |
d62a17ae | 1613 | |
1614 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1615 | THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1616 | circuit->lsp_regenerate_pending[level - 1] = 0; | |
1617 | if (level == IS_LEVEL_1) | |
1618 | thread_add_timer( | |
1619 | master, lsp_l1_refresh_pseudo, circuit, refresh_time, | |
1620 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1621 | else if (level == IS_LEVEL_2) | |
1622 | thread_add_timer( | |
1623 | master, lsp_l2_refresh_pseudo, circuit, refresh_time, | |
1624 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1625 | ||
1626 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1627 | zlog_debug( | |
af8ac8f9 CF |
1628 | "ISIS-Upd (%s): Built L%d Pseudo LSP %s, len %" PRIu16 |
1629 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1630 | ", lifetime %" PRIu16 "s, refresh %" PRIu16 "s", | |
d62a17ae | 1631 | circuit->area->area_tag, level, |
af8ac8f9 CF |
1632 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len, |
1633 | lsp->hdr.seqno, lsp->hdr.checksum, | |
1634 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1635 | } |
1636 | ||
1637 | return ISIS_OK; | |
3f045a08 JB |
1638 | } |
1639 | ||
d62a17ae | 1640 | static int lsp_regenerate_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1641 | { |
d62a17ae | 1642 | dict_t *lspdb = circuit->area->lspdb[level - 1]; |
1643 | struct isis_lsp *lsp; | |
d7c0a89a QY |
1644 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
1645 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1646 | |
1647 | if ((circuit->is_type & level) != level | |
1648 | || (circuit->state != C_STATE_UP) | |
1649 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1650 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1651 | return ISIS_ERROR; | |
1652 | ||
1653 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1654 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1655 | LSP_FRAGMENT(lsp_id) = 0; | |
1656 | ||
1657 | lsp = lsp_search(lsp_id, lspdb); | |
1658 | ||
1659 | if (!lsp) { | |
450971aa | 1660 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 QY |
1661 | "lsp_regenerate_pseudo: no l%d LSP %s found!", level, |
1662 | rawlspid_print(lsp_id)); | |
d62a17ae | 1663 | return ISIS_ERROR; |
1664 | } | |
d62a17ae | 1665 | |
d62a17ae | 1666 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); |
af8ac8f9 CF |
1667 | lsp->hdr.rem_lifetime = rem_lifetime; |
1668 | lsp_build_pseudo(lsp, circuit, level); | |
1669 | lsp_inc_seqno(lsp, 0); | |
d62a17ae | 1670 | lsp->last_generated = time(NULL); |
9b39405f | 1671 | lsp_flood(lsp, NULL); |
d62a17ae | 1672 | |
1673 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1674 | if (level == IS_LEVEL_1) | |
1675 | thread_add_timer( | |
1676 | master, lsp_l1_refresh_pseudo, circuit, refresh_time, | |
1677 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1678 | else if (level == IS_LEVEL_2) | |
1679 | thread_add_timer( | |
1680 | master, lsp_l2_refresh_pseudo, circuit, refresh_time, | |
1681 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1682 | ||
1683 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1684 | zlog_debug( | |
af8ac8f9 CF |
1685 | "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %s, len %" PRIu16 |
1686 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1687 | ", lifetime %" PRIu16 "s, refresh %" PRIu16 "s", | |
d62a17ae | 1688 | circuit->area->area_tag, level, |
af8ac8f9 CF |
1689 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len, |
1690 | lsp->hdr.seqno, lsp->hdr.checksum, | |
1691 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1692 | } |
1693 | ||
1694 | return ISIS_OK; | |
eb5d44eb | 1695 | } |
1696 | ||
3f045a08 JB |
1697 | /* |
1698 | * Something has changed or periodic refresh -> regenerate pseudo LSP | |
1699 | */ | |
d62a17ae | 1700 | static int lsp_l1_refresh_pseudo(struct thread *thread) |
eb5d44eb | 1701 | { |
d62a17ae | 1702 | struct isis_circuit *circuit; |
d7c0a89a | 1703 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
eb5d44eb | 1704 | |
d62a17ae | 1705 | circuit = THREAD_ARG(thread); |
f390d2c7 | 1706 | |
d62a17ae | 1707 | circuit->u.bc.t_refresh_pseudo_lsp[0] = NULL; |
1708 | circuit->lsp_regenerate_pending[0] = 0; | |
13c48f72 | 1709 | |
d62a17ae | 1710 | if ((circuit->u.bc.is_dr[0] == 0) |
1711 | || (circuit->is_type & IS_LEVEL_1) == 0) { | |
1712 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1713 | LSP_PSEUDO_ID(id) = circuit->circuit_id; | |
1714 | LSP_FRAGMENT(id) = 0; | |
1715 | lsp_purge_pseudo(id, circuit, IS_LEVEL_1); | |
1716 | return ISIS_ERROR; | |
1717 | } | |
eb5d44eb | 1718 | |
d62a17ae | 1719 | return lsp_regenerate_pseudo(circuit, IS_LEVEL_1); |
eb5d44eb | 1720 | } |
1721 | ||
d62a17ae | 1722 | static int lsp_l2_refresh_pseudo(struct thread *thread) |
eb5d44eb | 1723 | { |
d62a17ae | 1724 | struct isis_circuit *circuit; |
d7c0a89a | 1725 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
f390d2c7 | 1726 | |
d62a17ae | 1727 | circuit = THREAD_ARG(thread); |
f390d2c7 | 1728 | |
d62a17ae | 1729 | circuit->u.bc.t_refresh_pseudo_lsp[1] = NULL; |
1730 | circuit->lsp_regenerate_pending[1] = 0; | |
13c48f72 | 1731 | |
d62a17ae | 1732 | if ((circuit->u.bc.is_dr[1] == 0) |
1733 | || (circuit->is_type & IS_LEVEL_2) == 0) { | |
1734 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1735 | LSP_PSEUDO_ID(id) = circuit->circuit_id; | |
1736 | LSP_FRAGMENT(id) = 0; | |
1737 | lsp_purge_pseudo(id, circuit, IS_LEVEL_2); | |
1738 | return ISIS_ERROR; | |
1739 | } | |
eb5d44eb | 1740 | |
d62a17ae | 1741 | return lsp_regenerate_pseudo(circuit, IS_LEVEL_2); |
eb5d44eb | 1742 | } |
1743 | ||
d62a17ae | 1744 | int lsp_regenerate_schedule_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1745 | { |
d62a17ae | 1746 | struct isis_lsp *lsp; |
d7c0a89a | 1747 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1748 | time_t now, diff; |
1749 | long timeout; | |
1750 | int lvl; | |
1751 | struct isis_area *area = circuit->area; | |
1752 | ||
1753 | if (circuit->circ_type != CIRCUIT_T_BROADCAST | |
1754 | || circuit->state != C_STATE_UP) | |
1755 | return ISIS_OK; | |
1756 | ||
1757 | sched_debug( | |
1758 | "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s", | |
1759 | area->area_tag, circuit_t2string(level), | |
1760 | circuit->interface->name); | |
1761 | ||
1762 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1763 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1764 | LSP_FRAGMENT(lsp_id) = 0; | |
1765 | now = time(NULL); | |
1766 | ||
1767 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1768 | sched_debug( | |
1769 | "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled", | |
1770 | area->area_tag, lvl); | |
1771 | ||
1772 | if (!((level & lvl) && (circuit->is_type & lvl))) { | |
1773 | sched_debug("ISIS (%s): Level is not active on circuit", | |
1774 | area->area_tag); | |
1775 | continue; | |
1776 | } | |
1777 | ||
1778 | if (circuit->u.bc.is_dr[lvl - 1] == 0) { | |
1779 | sched_debug( | |
1780 | "ISIS (%s): This IS is not DR, nothing to do.", | |
1781 | area->area_tag); | |
1782 | continue; | |
1783 | } | |
1784 | ||
1785 | if (circuit->lsp_regenerate_pending[lvl - 1]) { | |
1786 | struct timeval remain = thread_timer_remain( | |
1787 | circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1788 | sched_debug( | |
1789 | "ISIS (%s): Regenerate is already pending, nothing todo." | |
1790 | " (Due in %lld.%03lld seconds)", | |
1791 | area->area_tag, (long long)remain.tv_sec, | |
1792 | (long long)remain.tv_usec / 1000); | |
1793 | continue; | |
1794 | } | |
1795 | ||
1796 | lsp = lsp_search(lsp_id, circuit->area->lspdb[lvl - 1]); | |
1797 | if (!lsp) { | |
1798 | sched_debug( | |
1799 | "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.", | |
1800 | area->area_tag); | |
1801 | continue; | |
1802 | } | |
1803 | ||
1804 | /* | |
1805 | * Throttle avoidance | |
1806 | */ | |
1807 | sched_debug( | |
1808 | "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld", | |
1809 | area->area_tag, (long long)lsp->last_generated, | |
1810 | (long long)now); | |
1811 | THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1812 | diff = now - lsp->last_generated; | |
1813 | if (diff < circuit->area->lsp_gen_interval[lvl - 1]) { | |
9d303b37 DL |
1814 | timeout = |
1815 | 1000 * (circuit->area->lsp_gen_interval[lvl - 1] | |
1816 | - diff); | |
d62a17ae | 1817 | sched_debug( |
1818 | "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval", | |
1819 | area->area_tag, timeout); | |
1820 | } else { | |
1821 | timeout = 100; | |
1822 | sched_debug( | |
1823 | "ISIS (%s): Last generation was more than lsp_gen_interval ago." | |
1824 | " Scheduling for execution in %ld ms.", | |
1825 | area->area_tag, timeout); | |
1826 | } | |
1827 | ||
1828 | circuit->lsp_regenerate_pending[lvl - 1] = 1; | |
1829 | ||
1830 | if (lvl == IS_LEVEL_1) { | |
1831 | thread_add_timer_msec( | |
1832 | master, lsp_l1_refresh_pseudo, circuit, timeout, | |
1833 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1834 | } else if (lvl == IS_LEVEL_2) { | |
1835 | thread_add_timer_msec( | |
1836 | master, lsp_l2_refresh_pseudo, circuit, timeout, | |
1837 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | return ISIS_OK; | |
f390d2c7 | 1842 | } |
eb5d44eb | 1843 | |
1844 | /* | |
1845 | * Walk through LSPs for an area | |
1846 | * - set remaining lifetime | |
eb5d44eb | 1847 | */ |
d62a17ae | 1848 | int lsp_tick(struct thread *thread) |
eb5d44eb | 1849 | { |
d62a17ae | 1850 | struct isis_area *area; |
d62a17ae | 1851 | struct isis_lsp *lsp; |
d62a17ae | 1852 | dnode_t *dnode, *dnode_next; |
1853 | int level; | |
d7c0a89a | 1854 | uint16_t rem_lifetime; |
8e6fb83b | 1855 | bool fabricd_sync_incomplete = false; |
d62a17ae | 1856 | |
d62a17ae | 1857 | area = THREAD_ARG(thread); |
1858 | assert(area); | |
1859 | area->t_tick = NULL; | |
1860 | thread_add_timer(master, lsp_tick, area, 1, &area->t_tick); | |
1861 | ||
8e6fb83b CF |
1862 | struct isis_circuit *fabricd_init_c = fabricd_initial_sync_circuit(area); |
1863 | ||
d62a17ae | 1864 | /* |
9b39405f | 1865 | * Remove LSPs which have aged out |
d62a17ae | 1866 | */ |
1867 | for (level = 0; level < ISIS_LEVELS; level++) { | |
1868 | if (area->lspdb[level] && dict_count(area->lspdb[level]) > 0) { | |
1869 | for (dnode = dict_first(area->lspdb[level]); | |
1870 | dnode != NULL; dnode = dnode_next) { | |
1871 | dnode_next = | |
1872 | dict_next(area->lspdb[level], dnode); | |
1873 | lsp = dnode_get(dnode); | |
1874 | ||
1875 | /* | |
1876 | * The lsp rem_lifetime is kept at 0 for MaxAge | |
1877 | * or | |
1878 | * ZeroAgeLifetime depending on explicit purge | |
1879 | * or | |
1880 | * natural age out. So schedule spf only once | |
1881 | * when | |
1882 | * the first time rem_lifetime becomes 0. | |
1883 | */ | |
af8ac8f9 | 1884 | rem_lifetime = lsp->hdr.rem_lifetime; |
d62a17ae | 1885 | lsp_set_time(lsp); |
1886 | ||
1887 | /* | |
1888 | * Schedule may run spf which should be done | |
1889 | * only after | |
1890 | * the lsp rem_lifetime becomes 0 for the first | |
1891 | * time. | |
1892 | * ISO 10589 - 7.3.16.4 first paragraph. | |
1893 | */ | |
af8ac8f9 | 1894 | if (rem_lifetime == 1 && lsp->hdr.seqno != 0) { |
d62a17ae | 1895 | /* 7.3.16.4 a) set SRM flags on all */ |
2c92bee4 CF |
1896 | /* 7.3.16.4 b) retain only the header */ |
1897 | if (lsp->area->purge_originator) | |
1898 | lsp_purge(lsp, lsp->level, NULL); | |
1899 | else | |
1900 | lsp_flood(lsp, NULL); | |
d62a17ae | 1901 | /* 7.3.16.4 c) record the time to purge |
1902 | * FIXME */ | |
2c92bee4 | 1903 | isis_spf_schedule(lsp->area, lsp->level); |
d62a17ae | 1904 | } |
1905 | ||
1906 | if (lsp->age_out == 0) { | |
1907 | zlog_debug( | |
af8ac8f9 CF |
1908 | "ISIS-Upd (%s): L%u LSP %s seq " |
1909 | "0x%08" PRIx32 " aged out", | |
d62a17ae | 1910 | area->area_tag, lsp->level, |
af8ac8f9 CF |
1911 | rawlspid_print(lsp->hdr.lsp_id), |
1912 | lsp->hdr.seqno); | |
d62a17ae | 1913 | lsp_destroy(lsp); |
1914 | lsp = NULL; | |
1915 | dict_delete_free(area->lspdb[level], | |
1916 | dnode); | |
9b39405f | 1917 | } |
8e6fb83b | 1918 | |
f2fcf867 | 1919 | if (fabricd_init_c && lsp) { |
8e6fb83b CF |
1920 | fabricd_sync_incomplete |= |
1921 | ISIS_CHECK_FLAG(lsp->SSNflags, | |
1922 | fabricd_init_c); | |
d62a17ae | 1923 | } |
d62a17ae | 1924 | } |
1925 | } | |
1926 | } | |
1927 | ||
9b39405f CF |
1928 | if (fabricd_init_c |
1929 | && !fabricd_sync_incomplete | |
1930 | && !isis_tx_queue_len(fabricd_init_c->tx_queue)) { | |
8e6fb83b | 1931 | fabricd_initial_sync_finish(area); |
9b39405f | 1932 | } |
d62a17ae | 1933 | |
1934 | return ISIS_OK; | |
eb5d44eb | 1935 | } |
1936 | ||
d7c0a89a | 1937 | void lsp_purge_pseudo(uint8_t *id, struct isis_circuit *circuit, int level) |
eb5d44eb | 1938 | { |
d62a17ae | 1939 | struct isis_lsp *lsp; |
d62a17ae | 1940 | |
1941 | lsp = lsp_search(id, circuit->area->lspdb[level - 1]); | |
1942 | if (!lsp) | |
1943 | return; | |
1944 | ||
2c92bee4 | 1945 | lsp_purge(lsp, level, NULL); |
eb5d44eb | 1946 | } |
1947 | ||
1948 | /* | |
d62a17ae | 1949 | * Purge own LSP that is received and we don't have. |
eb5d44eb | 1950 | * -> Do as in 7.3.16.4 |
1951 | */ | |
af8ac8f9 | 1952 | void lsp_purge_non_exist(int level, struct isis_lsp_hdr *hdr, |
d62a17ae | 1953 | struct isis_area *area) |
eb5d44eb | 1954 | { |
d62a17ae | 1955 | struct isis_lsp *lsp; |
1956 | ||
1957 | /* | |
1958 | * We need to create the LSP to be purged | |
1959 | */ | |
1960 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
1961 | lsp->area = area; | |
1962 | lsp->level = level; | |
d07067ba | 1963 | lsp_adjust_stream(lsp); |
af8ac8f9 | 1964 | lsp->age_out = ZERO_AGE_LIFETIME; |
d62a17ae | 1965 | |
af8ac8f9 CF |
1966 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
1967 | lsp->hdr.rem_lifetime = 0; | |
d62a17ae | 1968 | |
2c92bee4 CF |
1969 | lsp_purge_add_poi(lsp, NULL); |
1970 | ||
af8ac8f9 | 1971 | lsp_pack_pdu(lsp); |
d62a17ae | 1972 | |
d62a17ae | 1973 | lsp_insert(lsp, area->lspdb[lsp->level - 1]); |
9b39405f | 1974 | lsp_flood(lsp, NULL); |
d62a17ae | 1975 | |
1976 | return; | |
eb5d44eb | 1977 | } |
1978 | ||
9b39405f | 1979 | void lsp_set_all_srmflags(struct isis_lsp *lsp, bool set) |
3f045a08 | 1980 | { |
d62a17ae | 1981 | struct listnode *node; |
1982 | struct isis_circuit *circuit; | |
3f045a08 | 1983 | |
d62a17ae | 1984 | assert(lsp); |
3f045a08 | 1985 | |
9b39405f CF |
1986 | if (!lsp->area) |
1987 | return; | |
3f045a08 | 1988 | |
9b39405f CF |
1989 | struct list *circuit_list = lsp->area->circuit_list; |
1990 | for (ALL_LIST_ELEMENTS_RO(circuit_list, node, circuit)) { | |
1991 | if (set) { | |
1992 | isis_tx_queue_add(circuit->tx_queue, lsp, | |
1993 | TX_LSP_NORMAL); | |
1994 | } else { | |
1995 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
d62a17ae | 1996 | } |
1997 | } | |
3f045a08 | 1998 | } |
9b39405f CF |
1999 | |
2000 | void lsp_flood(struct isis_lsp *lsp, struct isis_circuit *circuit) | |
2001 | { | |
37212c41 | 2002 | if (!fabricd) |
9d224819 | 2003 | lsp_set_all_srmflags(lsp, true); |
37212c41 | 2004 | else |
9d224819 | 2005 | fabricd_lsp_flood(lsp); |
37212c41 CF |
2006 | |
2007 | if (circuit) | |
2008 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
9b39405f | 2009 | } |
a5b5e946 CF |
2010 | |
2011 | static int lsp_handle_adj_state_change(struct isis_adjacency *adj) | |
2012 | { | |
2013 | lsp_regenerate_schedule(adj->circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0); | |
2014 | return 0; | |
2015 | } | |
2016 | ||
2017 | void lsp_init(void) | |
2018 | { | |
2019 | hook_register(isis_adj_state_change_hook, | |
2020 | lsp_handle_adj_state_change); | |
2021 | } |