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