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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 | |
eb5d44eb | 43 | #include "isisd/isis_constants.h" |
44 | #include "isisd/isis_common.h" | |
3f045a08 | 45 | #include "isisd/isis_flags.h" |
eb5d44eb | 46 | #include "isisd/isis_circuit.h" |
47 | #include "isisd/isisd.h" | |
eb5d44eb | 48 | #include "isisd/isis_lsp.h" |
49 | #include "isisd/isis_pdu.h" | |
50 | #include "isisd/isis_dynhn.h" | |
51 | #include "isisd/isis_misc.h" | |
eb5d44eb | 52 | #include "isisd/isis_csm.h" |
53 | #include "isisd/isis_adjacency.h" | |
54 | #include "isisd/isis_spf.h" | |
99894f9a | 55 | #include "isisd/isis_mt.h" |
841791b6 | 56 | #include "isisd/isis_tlvs.h" |
1b3f47d0 | 57 | #include "isisd/isis_te.h" |
8e6fb83b | 58 | #include "isisd/fabricd.h" |
9b39405f | 59 | #include "isisd/isis_tx_queue.h" |
2a1c520e | 60 | #include "isisd/isis_nb.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 | |
4bef0ec4 DL |
66 | static void lsp_destroy(struct isis_lsp *lsp); |
67 | ||
d7c0a89a | 68 | int lsp_id_cmp(uint8_t *id1, uint8_t *id2) |
f390d2c7 | 69 | { |
d62a17ae | 70 | return memcmp(id1, id2, ISIS_SYS_ID_LEN + 2); |
eb5d44eb | 71 | } |
72 | ||
4bef0ec4 | 73 | int lspdb_compare(const struct isis_lsp *a, const struct isis_lsp *b) |
eb5d44eb | 74 | { |
4bef0ec4 | 75 | return memcmp(a->hdr.lsp_id, b->hdr.lsp_id, sizeof(a->hdr.lsp_id)); |
eb5d44eb | 76 | } |
77 | ||
4bef0ec4 | 78 | void lsp_db_init(struct lspdb_head *head) |
eb5d44eb | 79 | { |
4bef0ec4 DL |
80 | lspdb_init(head); |
81 | } | |
d62a17ae | 82 | |
4bef0ec4 DL |
83 | void lsp_db_fini(struct lspdb_head *head) |
84 | { | |
85 | struct isis_lsp *lsp; | |
eb5d44eb | 86 | |
4bef0ec4 DL |
87 | while ((lsp = lspdb_pop(head))) |
88 | lsp_destroy(lsp); | |
89 | lspdb_fini(head); | |
90 | } | |
f390d2c7 | 91 | |
4bef0ec4 DL |
92 | struct isis_lsp *lsp_search(struct lspdb_head *head, const uint8_t *id) |
93 | { | |
94 | struct isis_lsp searchfor; | |
95 | memcpy(searchfor.hdr.lsp_id, id, sizeof(searchfor.hdr.lsp_id)); | |
eb5d44eb | 96 | |
4bef0ec4 | 97 | return lspdb_find(head, &searchfor); |
eb5d44eb | 98 | } |
99 | ||
d62a17ae | 100 | static void lsp_clear_data(struct isis_lsp *lsp) |
eb5d44eb | 101 | { |
d62a17ae | 102 | if (!lsp) |
103 | return; | |
104 | ||
af8ac8f9 CF |
105 | isis_free_tlvs(lsp->tlvs); |
106 | lsp->tlvs = NULL; | |
eb5d44eb | 107 | } |
108 | ||
4bef0ec4 | 109 | static void lsp_remove_frags(struct lspdb_head *head, struct list *frags); |
dc84cf14 | 110 | |
d62a17ae | 111 | static void lsp_destroy(struct isis_lsp *lsp) |
eb5d44eb | 112 | { |
58e16237 | 113 | struct listnode *cnode; |
d62a17ae | 114 | struct isis_circuit *circuit; |
115 | ||
116 | if (!lsp) | |
117 | return; | |
118 | ||
58e16237 | 119 | for (ALL_LIST_ELEMENTS_RO(lsp->area->circuit_list, cnode, circuit)) |
9b39405f | 120 | isis_tx_queue_del(circuit->tx_queue, lsp); |
58e16237 | 121 | |
d62a17ae | 122 | ISIS_FLAGS_CLEAR_ALL(lsp->SSNflags); |
d62a17ae | 123 | |
124 | lsp_clear_data(lsp); | |
125 | ||
dc84cf14 CF |
126 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) { |
127 | if (lsp->lspu.frags) { | |
4bef0ec4 DL |
128 | lsp_remove_frags(&lsp->area->lspdb[lsp->level - 1], |
129 | lsp->lspu.frags); | |
dc84cf14 CF |
130 | list_delete(&lsp->lspu.frags); |
131 | } | |
132 | } else { | |
133 | if (lsp->lspu.zero_lsp | |
134 | && lsp->lspu.zero_lsp->lspu.frags) { | |
135 | listnode_delete(lsp->lspu.zero_lsp->lspu.frags, lsp); | |
136 | } | |
d62a17ae | 137 | } |
138 | ||
139 | isis_spf_schedule(lsp->area, lsp->level); | |
140 | ||
141 | if (lsp->pdu) | |
142 | stream_free(lsp->pdu); | |
1eb7c3a1 CF |
143 | |
144 | fabricd_lsp_free(lsp); | |
d62a17ae | 145 | XFREE(MTYPE_ISIS_LSP, lsp); |
eb5d44eb | 146 | } |
147 | ||
eb5d44eb | 148 | /* |
149 | * Remove all the frags belonging to the given lsp | |
150 | */ | |
4bef0ec4 | 151 | static void lsp_remove_frags(struct lspdb_head *head, struct list *frags) |
eb5d44eb | 152 | { |
d62a17ae | 153 | struct listnode *lnode, *lnnode; |
154 | struct isis_lsp *lsp; | |
155 | ||
156 | for (ALL_LIST_ELEMENTS(frags, lnode, lnnode, lsp)) { | |
4bef0ec4 DL |
157 | lsp = lsp_search(head, lsp->hdr.lsp_id); |
158 | lspdb_del(head, lsp); | |
d62a17ae | 159 | lsp_destroy(lsp); |
d62a17ae | 160 | } |
eb5d44eb | 161 | } |
162 | ||
4bef0ec4 | 163 | void lsp_search_and_destroy(struct lspdb_head *head, const uint8_t *id) |
eb5d44eb | 164 | { |
d62a17ae | 165 | struct isis_lsp *lsp; |
166 | ||
4bef0ec4 DL |
167 | lsp = lsp_search(head, id); |
168 | if (lsp) { | |
169 | lspdb_del(head, lsp); | |
d62a17ae | 170 | /* |
171 | * If this is a zero lsp, remove all the frags now | |
172 | */ | |
af8ac8f9 | 173 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) == 0) { |
d62a17ae | 174 | if (lsp->lspu.frags) |
4bef0ec4 | 175 | lsp_remove_frags(head, lsp->lspu.frags); |
d62a17ae | 176 | } else { |
177 | /* | |
178 | * else just remove this frag, from the zero lsps' frag | |
179 | * list | |
180 | */ | |
181 | if (lsp->lspu.zero_lsp | |
182 | && lsp->lspu.zero_lsp->lspu.frags) | |
183 | listnode_delete(lsp->lspu.zero_lsp->lspu.frags, | |
184 | lsp); | |
185 | } | |
186 | lsp_destroy(lsp); | |
d62a17ae | 187 | } |
eb5d44eb | 188 | } |
189 | ||
190 | /* | |
191 | * Compares a LSP to given values | |
192 | * Params are given in net order | |
193 | */ | |
af8ac8f9 CF |
194 | int lsp_compare(char *areatag, struct isis_lsp *lsp, uint32_t seqno, |
195 | uint16_t checksum, uint16_t rem_lifetime) | |
eb5d44eb | 196 | { |
af8ac8f9 CF |
197 | if (lsp->hdr.seqno == seqno && lsp->hdr.checksum == checksum |
198 | && ((lsp->hdr.rem_lifetime == 0 && rem_lifetime == 0) | |
199 | || (lsp->hdr.rem_lifetime != 0 && rem_lifetime != 0))) { | |
d62a17ae | 200 | if (isis->debugs & DEBUG_SNP_PACKETS) { |
201 | zlog_debug( | |
af8ac8f9 CF |
202 | "ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32 |
203 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
204 | "s", | |
205 | areatag, rawlspid_print(lsp->hdr.lsp_id), | |
206 | lsp->hdr.seqno, lsp->hdr.checksum, | |
207 | lsp->hdr.rem_lifetime); | |
d62a17ae | 208 | zlog_debug( |
af8ac8f9 CF |
209 | "ISIS-Snp (%s): is equal to ours seq 0x%08" PRIx32 |
210 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
211 | "s", | |
212 | areatag, seqno, checksum, rem_lifetime); | |
d62a17ae | 213 | } |
214 | return LSP_EQUAL; | |
215 | } | |
216 | ||
217 | /* | |
218 | * LSPs with identical checksums should only be treated as newer if: | |
219 | * a) The current LSP has a remaining lifetime != 0 and the other LSP | |
220 | * has a | |
221 | * remaining lifetime == 0. In this case, we should participate in | |
222 | * the purge | |
223 | * and should not treat the current LSP with remaining lifetime == 0 | |
224 | * as older. | |
225 | * b) The LSP has an incorrect checksum. In this case, we need to react | |
226 | * as given | |
227 | * in 7.3.16.2. | |
228 | */ | |
af8ac8f9 CF |
229 | if (seqno > lsp->hdr.seqno |
230 | || (seqno == lsp->hdr.seqno | |
231 | && ((lsp->hdr.rem_lifetime != 0 && rem_lifetime == 0) | |
16c2ab97 CF |
232 | || (lsp->hdr.checksum != checksum |
233 | && lsp->hdr.rem_lifetime)))) { | |
d62a17ae | 234 | if (isis->debugs & DEBUG_SNP_PACKETS) { |
235 | zlog_debug( | |
af8ac8f9 CF |
236 | "ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32 |
237 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
238 | "s", | |
239 | areatag, rawlspid_print(lsp->hdr.lsp_id), seqno, | |
240 | checksum, rem_lifetime); | |
d62a17ae | 241 | zlog_debug( |
af8ac8f9 CF |
242 | "ISIS-Snp (%s): is newer than ours seq 0x%08" PRIx32 |
243 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
244 | "s", | |
245 | areatag, lsp->hdr.seqno, lsp->hdr.checksum, | |
246 | lsp->hdr.rem_lifetime); | |
d62a17ae | 247 | } |
248 | return LSP_NEWER; | |
249 | } | |
250 | if (isis->debugs & DEBUG_SNP_PACKETS) { | |
af8ac8f9 CF |
251 | zlog_debug("ISIS-Snp (%s): Compare LSP %s seq 0x%08" PRIx32 |
252 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s", | |
253 | areatag, rawlspid_print(lsp->hdr.lsp_id), seqno, | |
254 | checksum, rem_lifetime); | |
d62a17ae | 255 | zlog_debug( |
af8ac8f9 CF |
256 | "ISIS-Snp (%s): is older than ours seq 0x%08" PRIx32 |
257 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s", | |
258 | areatag, lsp->hdr.seqno, lsp->hdr.checksum, | |
259 | lsp->hdr.rem_lifetime); | |
d62a17ae | 260 | } |
261 | ||
262 | return LSP_OLDER; | |
eb5d44eb | 263 | } |
264 | ||
c55018ab | 265 | static void put_lsp_hdr(struct isis_lsp *lsp, size_t *len_pointer, bool keep) |
3f045a08 | 266 | { |
af8ac8f9 CF |
267 | uint8_t pdu_type = |
268 | (lsp->level == IS_LEVEL_1) ? L1_LINK_STATE : L2_LINK_STATE; | |
269 | struct isis_lsp_hdr *hdr = &lsp->hdr; | |
270 | struct stream *stream = lsp->pdu; | |
b599ec55 | 271 | size_t orig_getp = 0, orig_endp = 0; |
c55018ab CF |
272 | |
273 | if (keep) { | |
274 | orig_getp = stream_get_getp(lsp->pdu); | |
275 | orig_endp = stream_get_endp(lsp->pdu); | |
276 | } | |
277 | ||
278 | stream_set_getp(lsp->pdu, 0); | |
279 | stream_set_endp(lsp->pdu, 0); | |
af8ac8f9 CF |
280 | |
281 | fill_fixed_hdr(pdu_type, stream); | |
282 | ||
283 | if (len_pointer) | |
284 | *len_pointer = stream_get_endp(stream); | |
285 | stream_putw(stream, hdr->pdu_len); | |
286 | stream_putw(stream, hdr->rem_lifetime); | |
287 | stream_put(stream, hdr->lsp_id, sizeof(hdr->lsp_id)); | |
288 | stream_putl(stream, hdr->seqno); | |
289 | stream_putw(stream, hdr->checksum); | |
290 | stream_putc(stream, hdr->lsp_bits); | |
c55018ab CF |
291 | |
292 | if (keep) { | |
293 | stream_set_endp(lsp->pdu, orig_endp); | |
294 | stream_set_getp(lsp->pdu, orig_getp); | |
295 | } | |
3f045a08 JB |
296 | } |
297 | ||
af8ac8f9 | 298 | static void lsp_add_auth(struct isis_lsp *lsp) |
3f045a08 | 299 | { |
d62a17ae | 300 | struct isis_passwd *passwd; |
af8ac8f9 CF |
301 | passwd = (lsp->level == IS_LEVEL_1) ? &lsp->area->area_passwd |
302 | : &lsp->area->domain_passwd; | |
303 | isis_tlvs_add_auth(lsp->tlvs, passwd); | |
304 | } | |
d62a17ae | 305 | |
af8ac8f9 CF |
306 | static void lsp_pack_pdu(struct isis_lsp *lsp) |
307 | { | |
308 | if (!lsp->tlvs) | |
309 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 310 | |
af8ac8f9 | 311 | lsp_add_auth(lsp); |
d62a17ae | 312 | |
af8ac8f9 | 313 | size_t len_pointer; |
c55018ab | 314 | put_lsp_hdr(lsp, &len_pointer, false); |
af8ac8f9 CF |
315 | isis_pack_tlvs(lsp->tlvs, lsp->pdu, len_pointer, false, true); |
316 | ||
317 | lsp->hdr.pdu_len = stream_get_endp(lsp->pdu); | |
318 | lsp->hdr.checksum = | |
319 | ntohs(fletcher_checksum(STREAM_DATA(lsp->pdu) + 12, | |
320 | stream_get_endp(lsp->pdu) - 12, 12)); | |
3f045a08 JB |
321 | } |
322 | ||
af8ac8f9 | 323 | void lsp_inc_seqno(struct isis_lsp *lsp, uint32_t seqno) |
eb5d44eb | 324 | { |
af8ac8f9 | 325 | uint32_t newseq; |
d62a17ae | 326 | |
af8ac8f9 CF |
327 | if (seqno == 0 || lsp->hdr.seqno > seqno) |
328 | newseq = lsp->hdr.seqno + 1; | |
d62a17ae | 329 | else |
af8ac8f9 | 330 | newseq = seqno + 1; |
d62a17ae | 331 | |
b21b068d EDP |
332 | #ifndef FABRICD |
333 | /* check for overflow */ | |
334 | if (newseq < lsp->hdr.seqno) { | |
335 | /* send northbound notification */ | |
336 | isis_notif_lsp_exceed_max(lsp->area, | |
337 | rawlspid_print(lsp->hdr.lsp_id)); | |
338 | } | |
339 | #endif /* ifndef FABRICD */ | |
340 | ||
af8ac8f9 CF |
341 | lsp->hdr.seqno = newseq; |
342 | ||
343 | lsp_pack_pdu(lsp); | |
d62a17ae | 344 | isis_spf_schedule(lsp->area, lsp->level); |
af8ac8f9 | 345 | } |
d62a17ae | 346 | |
2c92bee4 CF |
347 | static void lsp_purge_add_poi(struct isis_lsp *lsp, |
348 | const uint8_t *sender) | |
349 | { | |
350 | if (!lsp->area->purge_originator) | |
351 | return; | |
352 | ||
353 | /* add purge originator identification */ | |
354 | if (!lsp->tlvs) | |
355 | lsp->tlvs = isis_alloc_tlvs(); | |
356 | isis_tlvs_set_purge_originator(lsp->tlvs, isis->sysid, sender); | |
357 | isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get()); | |
358 | } | |
359 | ||
360 | static void lsp_purge(struct isis_lsp *lsp, int level, | |
361 | const uint8_t *sender) | |
af8ac8f9 CF |
362 | { |
363 | /* reset stream */ | |
364 | lsp_clear_data(lsp); | |
365 | stream_reset(lsp->pdu); | |
366 | ||
367 | /* update header */ | |
368 | lsp->hdr.checksum = 0; | |
369 | lsp->hdr.rem_lifetime = 0; | |
370 | lsp->level = level; | |
371 | lsp->age_out = lsp->area->max_lsp_lifetime[level - 1]; | |
6f004b60 | 372 | lsp->area->lsp_purge_count[level - 1]++; |
af8ac8f9 | 373 | |
2c92bee4 CF |
374 | lsp_purge_add_poi(lsp, sender); |
375 | ||
af8ac8f9 | 376 | lsp_pack_pdu(lsp); |
9b39405f | 377 | lsp_flood(lsp, NULL); |
eb5d44eb | 378 | } |
379 | ||
380 | /* | |
af8ac8f9 | 381 | * Generates checksum for LSP and its frags |
eb5d44eb | 382 | */ |
af8ac8f9 | 383 | static void lsp_seqno_update(struct isis_lsp *lsp0) |
eb5d44eb | 384 | { |
d62a17ae | 385 | struct isis_lsp *lsp; |
386 | struct listnode *node; | |
f390d2c7 | 387 | |
af8ac8f9 | 388 | lsp_inc_seqno(lsp0, 0); |
eb5d44eb | 389 | |
d62a17ae | 390 | if (!lsp0->lspu.frags) |
391 | return; | |
eb5d44eb | 392 | |
af8ac8f9 CF |
393 | for (ALL_LIST_ELEMENTS_RO(lsp0->lspu.frags, node, lsp)) { |
394 | if (lsp->tlvs) | |
395 | lsp_inc_seqno(lsp, 0); | |
8f27aa27 CF |
396 | else if (lsp->hdr.rem_lifetime) { |
397 | /* Purge should only be applied when the fragment has | |
398 | * non-zero remaining lifetime. | |
399 | */ | |
2c92bee4 | 400 | lsp_purge(lsp, lsp0->level, NULL); |
8f27aa27 | 401 | } |
af8ac8f9 | 402 | } |
f390d2c7 | 403 | |
d62a17ae | 404 | return; |
eb5d44eb | 405 | } |
406 | ||
d7c0a89a | 407 | static uint8_t lsp_bits_generate(int level, int overload_bit, int attached_bit) |
e38e0df0 | 408 | { |
d7c0a89a | 409 | uint8_t lsp_bits = 0; |
d62a17ae | 410 | if (level == IS_LEVEL_1) |
411 | lsp_bits = IS_LEVEL_1; | |
412 | else | |
413 | lsp_bits = IS_LEVEL_1_AND_2; | |
414 | if (overload_bit) | |
415 | lsp_bits |= overload_bit; | |
416 | if (attached_bit) | |
417 | lsp_bits |= attached_bit; | |
418 | return lsp_bits; | |
e38e0df0 SV |
419 | } |
420 | ||
af8ac8f9 CF |
421 | static void lsp_update_data(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr, |
422 | struct isis_tlvs *tlvs, struct stream *stream, | |
d62a17ae | 423 | struct isis_area *area, int level) |
eb5d44eb | 424 | { |
d62a17ae | 425 | /* free the old lsp data */ |
426 | lsp_clear_data(lsp); | |
427 | ||
428 | /* copying only the relevant part of our stream */ | |
429 | if (lsp->pdu != NULL) | |
430 | stream_free(lsp->pdu); | |
431 | lsp->pdu = stream_dup(stream); | |
432 | ||
af8ac8f9 | 433 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
d62a17ae | 434 | lsp->area = area; |
435 | lsp->level = level; | |
436 | lsp->age_out = ZERO_AGE_LIFETIME; | |
437 | lsp->installed = time(NULL); | |
d62a17ae | 438 | |
af8ac8f9 CF |
439 | lsp->tlvs = tlvs; |
440 | ||
2c92bee4 CF |
441 | if (area->dynhostname && lsp->tlvs->hostname |
442 | && lsp->hdr.rem_lifetime) { | |
af8ac8f9 CF |
443 | isis_dynhn_insert(lsp->hdr.lsp_id, lsp->tlvs->hostname, |
444 | (lsp->hdr.lsp_bits & LSPBIT_IST) | |
d62a17ae | 445 | == IS_LEVEL_1_AND_2 |
446 | ? IS_LEVEL_2 | |
447 | : IS_LEVEL_1); | |
448 | } | |
449 | ||
450 | return; | |
eb5d44eb | 451 | } |
452 | ||
0b8b6cab CF |
453 | static void lsp_link_fragment(struct isis_lsp *lsp, struct isis_lsp *lsp0) |
454 | { | |
455 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) { | |
456 | /* zero lsp -> create list to store fragments */ | |
457 | lsp->lspu.frags = list_new(); | |
458 | } else { | |
459 | /* fragment -> set backpointer and add to zero lsps list */ | |
460 | assert(lsp0); | |
461 | lsp->lspu.zero_lsp = lsp0; | |
462 | listnode_add(lsp0->lspu.frags, lsp); | |
463 | } | |
464 | } | |
465 | ||
af8ac8f9 CF |
466 | void lsp_update(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr, |
467 | struct isis_tlvs *tlvs, struct stream *stream, | |
164066e4 | 468 | struct isis_area *area, int level, bool confusion) |
eb5d44eb | 469 | { |
d62a17ae | 470 | if (lsp->own_lsp) { |
af4c2728 | 471 | flog_err( |
450971aa | 472 | EC_LIB_DEVELOPMENT, |
d62a17ae | 473 | "ISIS-Upd (%s): BUG updating LSP %s still marked as own LSP", |
af8ac8f9 | 474 | area->area_tag, rawlspid_print(lsp->hdr.lsp_id)); |
d62a17ae | 475 | lsp_clear_data(lsp); |
476 | lsp->own_lsp = 0; | |
477 | } | |
478 | ||
164066e4 | 479 | if (confusion) { |
2c92bee4 CF |
480 | lsp_purge(lsp, level, NULL); |
481 | } else { | |
482 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); | |
164066e4 | 483 | } |
d62a17ae | 484 | |
0b8b6cab CF |
485 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) && !lsp->lspu.zero_lsp) { |
486 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
487 | struct isis_lsp *lsp0; | |
eb5d44eb | 488 | |
0b8b6cab CF |
489 | memcpy(lspid, lsp->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); |
490 | LSP_FRAGMENT(lspid) = 0; | |
4bef0ec4 | 491 | lsp0 = lsp_search(&area->lspdb[level - 1], lspid); |
0b8b6cab CF |
492 | if (lsp0) |
493 | lsp_link_fragment(lsp, lsp0); | |
8f5dbe18 | 494 | } |
0b8b6cab | 495 | |
5304211a CF |
496 | if (lsp->hdr.seqno) |
497 | isis_spf_schedule(lsp->area, lsp->level); | |
8f5dbe18 CF |
498 | } |
499 | ||
eb5d44eb | 500 | /* creation of LSP directly from what we received */ |
af8ac8f9 CF |
501 | struct isis_lsp *lsp_new_from_recv(struct isis_lsp_hdr *hdr, |
502 | struct isis_tlvs *tlvs, | |
503 | struct stream *stream, struct isis_lsp *lsp0, | |
504 | struct isis_area *area, int level) | |
eb5d44eb | 505 | { |
d62a17ae | 506 | struct isis_lsp *lsp; |
507 | ||
508 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
af8ac8f9 | 509 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); |
8f5dbe18 | 510 | lsp_link_fragment(lsp, lsp0); |
d62a17ae | 511 | |
512 | return lsp; | |
eb5d44eb | 513 | } |
514 | ||
d07067ba CF |
515 | static void lsp_adjust_stream(struct isis_lsp *lsp) |
516 | { | |
517 | if (lsp->pdu) { | |
518 | if (STREAM_SIZE(lsp->pdu) == LLC_LEN + lsp->area->lsp_mtu) | |
519 | return; | |
520 | stream_free(lsp->pdu); | |
521 | } | |
522 | ||
523 | lsp->pdu = stream_new(LLC_LEN + lsp->area->lsp_mtu); | |
524 | } | |
525 | ||
d7c0a89a | 526 | struct isis_lsp *lsp_new(struct isis_area *area, uint8_t *lsp_id, |
af8ac8f9 | 527 | uint16_t rem_lifetime, uint32_t seqno, |
8f5dbe18 CF |
528 | uint8_t lsp_bits, uint16_t checksum, |
529 | struct isis_lsp *lsp0, int level) | |
eb5d44eb | 530 | { |
d62a17ae | 531 | struct isis_lsp *lsp; |
532 | ||
533 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
534 | lsp->area = area; | |
535 | ||
d07067ba | 536 | lsp_adjust_stream(lsp); |
d62a17ae | 537 | |
d62a17ae | 538 | /* Minimal LSP PDU size */ |
af8ac8f9 CF |
539 | lsp->hdr.pdu_len = ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN; |
540 | memcpy(lsp->hdr.lsp_id, lsp_id, sizeof(lsp->hdr.lsp_id)); | |
541 | lsp->hdr.checksum = checksum; | |
542 | lsp->hdr.seqno = seqno; | |
543 | lsp->hdr.rem_lifetime = rem_lifetime; | |
544 | lsp->hdr.lsp_bits = lsp_bits; | |
d62a17ae | 545 | lsp->level = level; |
546 | lsp->age_out = ZERO_AGE_LIFETIME; | |
8f5dbe18 | 547 | lsp_link_fragment(lsp, lsp0); |
c55018ab | 548 | put_lsp_hdr(lsp, NULL, false); |
d62a17ae | 549 | |
550 | if (isis->debugs & DEBUG_EVENTS) | |
551 | zlog_debug("New LSP with ID %s-%02x-%02x len %d seqnum %08x", | |
af8ac8f9 CF |
552 | sysid_print(lsp_id), LSP_PSEUDO_ID(lsp->hdr.lsp_id), |
553 | LSP_FRAGMENT(lsp->hdr.lsp_id), lsp->hdr.pdu_len, | |
554 | lsp->hdr.seqno); | |
d62a17ae | 555 | |
556 | return lsp; | |
eb5d44eb | 557 | } |
558 | ||
4bef0ec4 | 559 | void lsp_insert(struct lspdb_head *head, struct isis_lsp *lsp) |
eb5d44eb | 560 | { |
4bef0ec4 | 561 | lspdb_add(head, lsp); |
af8ac8f9 | 562 | if (lsp->hdr.seqno) |
d62a17ae | 563 | isis_spf_schedule(lsp->area, lsp->level); |
eb5d44eb | 564 | } |
565 | ||
566 | /* | |
567 | * Build a list of LSPs with non-zero ht bounded by start and stop ids | |
568 | */ | |
4bef0ec4 DL |
569 | void lsp_build_list_nonzero_ht(struct lspdb_head *head, const uint8_t *start_id, |
570 | const uint8_t *stop_id, struct list *list) | |
eb5d44eb | 571 | { |
4bef0ec4 DL |
572 | struct isis_lsp searchfor; |
573 | struct isis_lsp *lsp, *start; | |
574 | ||
575 | memcpy(&searchfor.hdr.lsp_id, start_id, sizeof(searchfor.hdr.lsp_id)); | |
eb5d44eb | 576 | |
4bef0ec4 | 577 | start = lspdb_find_gteq(head, &searchfor); |
81fddbe7 | 578 | frr_each_from (lspdb, head, lsp, start) { |
9337256e CF |
579 | if (memcmp(lsp->hdr.lsp_id, stop_id, |
580 | ISIS_SYS_ID_LEN + 2) > 0) | |
d62a17ae | 581 | break; |
f390d2c7 | 582 | |
9337256e CF |
583 | if (lsp->hdr.rem_lifetime) |
584 | listnode_add(list, lsp); | |
585 | } | |
eb5d44eb | 586 | } |
587 | ||
d62a17ae | 588 | static void lsp_set_time(struct isis_lsp *lsp) |
eb5d44eb | 589 | { |
d62a17ae | 590 | assert(lsp); |
f390d2c7 | 591 | |
af8ac8f9 | 592 | if (lsp->hdr.rem_lifetime == 0) { |
d62a17ae | 593 | if (lsp->age_out > 0) |
594 | lsp->age_out--; | |
595 | return; | |
596 | } | |
eb5d44eb | 597 | |
af8ac8f9 CF |
598 | lsp->hdr.rem_lifetime--; |
599 | if (lsp->pdu && stream_get_endp(lsp->pdu) >= 12) | |
600 | stream_putw_at(lsp->pdu, 10, lsp->hdr.rem_lifetime); | |
eb5d44eb | 601 | } |
602 | ||
0d6fb551 | 603 | void lspid_print(uint8_t *lsp_id, char *dest, char dynhost, char frag) |
eb5d44eb | 604 | { |
d62a17ae | 605 | struct isis_dynhn *dyn = NULL; |
d7c0a89a | 606 | uint8_t id[SYSID_STRLEN]; |
d62a17ae | 607 | |
608 | if (dynhost) | |
609 | dyn = dynhn_find_by_id(lsp_id); | |
610 | else | |
611 | dyn = NULL; | |
612 | ||
613 | if (dyn) | |
af8ac8f9 | 614 | sprintf((char *)id, "%.14s", dyn->hostname); |
d62a17ae | 615 | else if (!memcmp(isis->sysid, lsp_id, ISIS_SYS_ID_LEN) && dynhost) |
6b3ee3a0 | 616 | sprintf((char *)id, "%.14s", cmd_hostname_get()); |
d62a17ae | 617 | else |
618 | memcpy(id, sysid_print(lsp_id), 15); | |
619 | if (frag) | |
0d6fb551 | 620 | sprintf(dest, "%s.%02x-%02x", id, LSP_PSEUDO_ID(lsp_id), |
d62a17ae | 621 | LSP_FRAGMENT(lsp_id)); |
622 | else | |
0d6fb551 | 623 | sprintf(dest, "%s.%02x", id, LSP_PSEUDO_ID(lsp_id)); |
eb5d44eb | 624 | } |
625 | ||
f390d2c7 | 626 | /* Convert the lsp attribute bits to attribute string */ |
36228974 | 627 | static const char *lsp_bits2string(uint8_t lsp_bits, char *buf, size_t buf_size) |
f390d2c7 | 628 | { |
36228974 | 629 | char *pos = buf; |
eb5d44eb | 630 | |
af8ac8f9 | 631 | if (!lsp_bits) |
d62a17ae | 632 | return " none"; |
eb5d44eb | 633 | |
36228974 | 634 | if (buf_size < 2 * 3) |
635 | return " error"; | |
636 | ||
d62a17ae | 637 | /* we only focus on the default metric */ |
638 | pos += sprintf(pos, "%d/", | |
af8ac8f9 | 639 | ISIS_MASK_LSP_ATT_DEFAULT_BIT(lsp_bits) ? 1 : 0); |
eb5d44eb | 640 | |
d62a17ae | 641 | pos += sprintf(pos, "%d/", |
af8ac8f9 | 642 | ISIS_MASK_LSP_PARTITION_BIT(lsp_bits) ? 1 : 0); |
f390d2c7 | 643 | |
e36e5b56 | 644 | sprintf(pos, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits) ? 1 : 0); |
eb5d44eb | 645 | |
36228974 | 646 | return buf; |
eb5d44eb | 647 | } |
648 | ||
649 | /* this function prints the lsp on show isis database */ | |
d62a17ae | 650 | void lsp_print(struct isis_lsp *lsp, struct vty *vty, char dynhost) |
eb5d44eb | 651 | { |
0d6fb551 | 652 | char LSPid[255]; |
d62a17ae | 653 | char age_out[8]; |
36228974 | 654 | char b[200]; |
d62a17ae | 655 | |
af8ac8f9 | 656 | lspid_print(lsp->hdr.lsp_id, LSPid, dynhost, 1); |
d62a17ae | 657 | vty_out(vty, "%-21s%c ", LSPid, lsp->own_lsp ? '*' : ' '); |
af8ac8f9 CF |
658 | vty_out(vty, "%5" PRIu16 " ", lsp->hdr.pdu_len); |
659 | vty_out(vty, "0x%08" PRIx32 " ", lsp->hdr.seqno); | |
660 | vty_out(vty, "0x%04" PRIx16 " ", lsp->hdr.checksum); | |
661 | if (lsp->hdr.rem_lifetime == 0) { | |
662 | snprintf(age_out, 8, "(%d)", lsp->age_out); | |
d62a17ae | 663 | age_out[7] = '\0'; |
664 | vty_out(vty, "%7s ", age_out); | |
665 | } else | |
af8ac8f9 | 666 | vty_out(vty, " %5" PRIu16 " ", lsp->hdr.rem_lifetime); |
36228974 | 667 | vty_out(vty, "%s\n", lsp_bits2string(lsp->hdr.lsp_bits, b, sizeof(b))); |
c3ae3127 CF |
668 | } |
669 | ||
d62a17ae | 670 | void lsp_print_detail(struct isis_lsp *lsp, struct vty *vty, char dynhost) |
eb5d44eb | 671 | { |
d62a17ae | 672 | lsp_print(lsp, vty, dynhost); |
af8ac8f9 CF |
673 | if (lsp->tlvs) |
674 | vty_multiline(vty, " ", "%s", isis_format_tlvs(lsp->tlvs)); | |
d62a17ae | 675 | vty_out(vty, "\n"); |
eb5d44eb | 676 | } |
677 | ||
678 | /* print all the lsps info in the local lspdb */ | |
4bef0ec4 DL |
679 | int lsp_print_all(struct vty *vty, struct lspdb_head *head, char detail, |
680 | char dynhost) | |
eb5d44eb | 681 | { |
4bef0ec4 | 682 | struct isis_lsp *lsp; |
d62a17ae | 683 | int lsp_count = 0; |
684 | ||
685 | if (detail == ISIS_UI_LEVEL_BRIEF) { | |
81fddbe7 | 686 | frr_each (lspdb, head, lsp) { |
4bef0ec4 | 687 | lsp_print(lsp, vty, dynhost); |
d62a17ae | 688 | lsp_count++; |
689 | } | |
690 | } else if (detail == ISIS_UI_LEVEL_DETAIL) { | |
81fddbe7 | 691 | frr_each (lspdb, head, lsp) { |
4bef0ec4 | 692 | lsp_print_detail(lsp, vty, dynhost); |
d62a17ae | 693 | lsp_count++; |
694 | } | |
695 | } | |
696 | ||
697 | return lsp_count; | |
eb5d44eb | 698 | } |
699 | ||
d7c0a89a | 700 | static uint16_t lsp_rem_lifetime(struct isis_area *area, int level) |
3f045a08 | 701 | { |
d7c0a89a | 702 | uint16_t rem_lifetime; |
3f045a08 | 703 | |
d62a17ae | 704 | /* Add jitter to configured LSP lifetime */ |
705 | rem_lifetime = | |
706 | isis_jitter(area->max_lsp_lifetime[level - 1], MAX_AGE_JITTER); | |
3f045a08 | 707 | |
d62a17ae | 708 | /* No jitter if the max refresh will be less than configure gen interval |
709 | */ | |
710 | /* N.B. this calucation is acceptable since rem_lifetime is in | |
711 | * [332,65535] at | |
712 | * this point */ | |
713 | if (area->lsp_gen_interval[level - 1] > (rem_lifetime - 300)) | |
714 | rem_lifetime = area->max_lsp_lifetime[level - 1]; | |
3f045a08 | 715 | |
d62a17ae | 716 | return rem_lifetime; |
3f045a08 JB |
717 | } |
718 | ||
d7c0a89a | 719 | static uint16_t lsp_refresh_time(struct isis_lsp *lsp, uint16_t rem_lifetime) |
3f045a08 | 720 | { |
d62a17ae | 721 | struct isis_area *area = lsp->area; |
722 | int level = lsp->level; | |
d7c0a89a | 723 | uint16_t refresh_time; |
3f045a08 | 724 | |
d62a17ae | 725 | /* Add jitter to LSP refresh time */ |
726 | refresh_time = | |
727 | isis_jitter(area->lsp_refresh[level - 1], MAX_LSP_GEN_JITTER); | |
3f045a08 | 728 | |
d62a17ae | 729 | /* RFC 4444 : make sure the refresh time is at least less than 300 |
730 | * of the remaining lifetime and more than gen interval */ | |
731 | if (refresh_time <= area->lsp_gen_interval[level - 1] | |
732 | || refresh_time > (rem_lifetime - 300)) | |
733 | refresh_time = rem_lifetime - 300; | |
3f045a08 | 734 | |
d62a17ae | 735 | /* In cornercases, refresh_time might be <= lsp_gen_interval, however |
736 | * we accept this violation to satisfy refresh_time <= rem_lifetime - | |
737 | * 300 */ | |
3f045a08 | 738 | |
d62a17ae | 739 | return refresh_time; |
3f045a08 JB |
740 | } |
741 | ||
d62a17ae | 742 | static void lsp_build_ext_reach_ipv4(struct isis_lsp *lsp, |
af8ac8f9 | 743 | struct isis_area *area) |
f3ccedaa | 744 | { |
af8ac8f9 | 745 | struct route_table *er_table = get_ext_reach(area, AF_INET, lsp->level); |
d62a17ae | 746 | if (!er_table) |
747 | return; | |
748 | ||
af8ac8f9 CF |
749 | for (struct route_node *rn = route_top(er_table); rn; |
750 | rn = route_next(rn)) { | |
d62a17ae | 751 | if (!rn->info) |
752 | continue; | |
753 | ||
af8ac8f9 CF |
754 | struct prefix_ipv4 *ipv4 = (struct prefix_ipv4 *)&rn->p; |
755 | struct isis_ext_info *info = rn->info; | |
f3ccedaa | 756 | |
af8ac8f9 CF |
757 | uint32_t metric = info->metric; |
758 | if (metric > MAX_WIDE_PATH_METRIC) | |
759 | metric = MAX_WIDE_PATH_METRIC; | |
760 | if (area->oldmetric && metric > 0x3f) | |
761 | metric = 0x3f; | |
d62a17ae | 762 | |
af8ac8f9 CF |
763 | if (area->oldmetric) |
764 | isis_tlvs_add_oldstyle_ip_reach(lsp->tlvs, ipv4, | |
765 | metric); | |
766 | if (area->newmetric) | |
767 | isis_tlvs_add_extended_ip_reach(lsp->tlvs, ipv4, | |
768 | metric); | |
769 | } | |
c3ae3127 CF |
770 | } |
771 | ||
d62a17ae | 772 | static void lsp_build_ext_reach_ipv6(struct isis_lsp *lsp, |
af8ac8f9 | 773 | struct isis_area *area) |
f3ccedaa | 774 | { |
af8ac8f9 CF |
775 | struct route_table *er_table = |
776 | get_ext_reach(area, AF_INET6, lsp->level); | |
d62a17ae | 777 | if (!er_table) |
778 | return; | |
779 | ||
af8ac8f9 | 780 | for (struct route_node *rn = route_top(er_table); rn; |
d43d2df5 | 781 | rn = srcdest_route_next(rn)) { |
d62a17ae | 782 | if (!rn->info) |
783 | continue; | |
af8ac8f9 | 784 | struct isis_ext_info *info = rn->info; |
d43d2df5 | 785 | struct prefix_ipv6 *p, *src_p; |
1b3f47d0 | 786 | |
d43d2df5 CF |
787 | srcdest_rnode_prefixes(rn, (const struct prefix **)&p, |
788 | (const struct prefix **)&src_p); | |
789 | ||
af8ac8f9 | 790 | uint32_t metric = info->metric; |
d62a17ae | 791 | if (info->metric > MAX_WIDE_PATH_METRIC) |
af8ac8f9 | 792 | metric = MAX_WIDE_PATH_METRIC; |
d43d2df5 CF |
793 | |
794 | if (!src_p || !src_p->prefixlen) { | |
795 | isis_tlvs_add_ipv6_reach(lsp->tlvs, | |
796 | isis_area_ipv6_topology(area), | |
797 | p, metric); | |
798 | } else if (isis_area_ipv6_dstsrc_enabled(area)) { | |
799 | isis_tlvs_add_ipv6_dstsrc_reach(lsp->tlvs, | |
800 | ISIS_MT_IPV6_DSTSRC, | |
801 | p, src_p, metric); | |
802 | } | |
d62a17ae | 803 | } |
f3ccedaa CF |
804 | } |
805 | ||
af8ac8f9 | 806 | static void lsp_build_ext_reach(struct isis_lsp *lsp, struct isis_area *area) |
f3ccedaa | 807 | { |
af8ac8f9 CF |
808 | lsp_build_ext_reach_ipv4(lsp, area); |
809 | lsp_build_ext_reach_ipv6(lsp, area); | |
810 | } | |
811 | ||
812 | static struct isis_lsp *lsp_next_frag(uint8_t frag_num, struct isis_lsp *lsp0, | |
813 | struct isis_area *area, int level) | |
814 | { | |
815 | struct isis_lsp *lsp; | |
816 | uint8_t frag_id[ISIS_SYS_ID_LEN + 2]; | |
817 | ||
818 | memcpy(frag_id, lsp0->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); | |
819 | LSP_FRAGMENT(frag_id) = frag_num; | |
820 | ||
4bef0ec4 | 821 | lsp = lsp_search(&area->lspdb[level - 1], frag_id); |
af8ac8f9 CF |
822 | if (lsp) { |
823 | lsp_clear_data(lsp); | |
0b8b6cab CF |
824 | if (!lsp->lspu.zero_lsp) |
825 | lsp_link_fragment(lsp, lsp0); | |
af8ac8f9 CF |
826 | return lsp; |
827 | } | |
828 | ||
829 | lsp = lsp_new(area, frag_id, lsp0->hdr.rem_lifetime, 0, | |
830 | lsp_bits_generate(level, area->overload_bit, | |
831 | area->attached_bit), | |
8f5dbe18 | 832 | 0, lsp0, level); |
af8ac8f9 | 833 | lsp->own_lsp = 1; |
4bef0ec4 | 834 | lsp_insert(&area->lspdb[level - 1], lsp); |
af8ac8f9 | 835 | return lsp; |
f3ccedaa CF |
836 | } |
837 | ||
eb5d44eb | 838 | /* |
d62a17ae | 839 | * Builds the LSP data part. This func creates a new frag whenever |
eb5d44eb | 840 | * area->lsp_frag_threshold is exceeded. |
841 | */ | |
d62a17ae | 842 | static void lsp_build(struct isis_lsp *lsp, struct isis_area *area) |
eb5d44eb | 843 | { |
d62a17ae | 844 | int level = lsp->level; |
af8ac8f9 CF |
845 | char buf[PREFIX2STR_BUFFER]; |
846 | struct listnode *node; | |
847 | struct isis_lsp *frag; | |
848 | ||
849 | lsp_clear_data(lsp); | |
850 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) | |
851 | lsp_clear_data(frag); | |
d62a17ae | 852 | |
af8ac8f9 | 853 | lsp->tlvs = isis_alloc_tlvs(); |
d62a17ae | 854 | lsp_debug("ISIS (%s): Constructing local system LSP for level %d", |
855 | area->area_tag, level); | |
856 | ||
af8ac8f9 CF |
857 | lsp->hdr.lsp_bits = lsp_bits_generate(level, area->overload_bit, |
858 | area->attached_bit); | |
d62a17ae | 859 | |
af8ac8f9 | 860 | lsp_add_auth(lsp); |
d62a17ae | 861 | |
af8ac8f9 | 862 | isis_tlvs_add_area_addresses(lsp->tlvs, area->area_addrs); |
d62a17ae | 863 | |
864 | /* Protocols Supported */ | |
865 | if (area->ip_circuits > 0 || area->ipv6_circuits > 0) { | |
af8ac8f9 | 866 | struct nlpids nlpids = {.count = 0}; |
1b3f47d0 | 867 | |
d62a17ae | 868 | if (area->ip_circuits > 0) { |
869 | lsp_debug( | |
870 | "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs", | |
871 | area->area_tag); | |
af8ac8f9 CF |
872 | nlpids.nlpids[nlpids.count] = NLPID_IP; |
873 | nlpids.count++; | |
d62a17ae | 874 | } |
875 | if (area->ipv6_circuits > 0) { | |
876 | lsp_debug( | |
877 | "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs", | |
878 | area->area_tag); | |
af8ac8f9 CF |
879 | nlpids.nlpids[nlpids.count] = NLPID_IPV6; |
880 | nlpids.count++; | |
d62a17ae | 881 | } |
af8ac8f9 | 882 | isis_tlvs_set_protocols_supported(lsp->tlvs, &nlpids); |
d62a17ae | 883 | } |
884 | ||
885 | if (area_is_mt(area)) { | |
886 | lsp_debug("ISIS (%s): Adding MT router tlv...", area->area_tag); | |
d62a17ae | 887 | |
888 | struct isis_area_mt_setting **mt_settings; | |
889 | unsigned int mt_count; | |
890 | ||
891 | mt_settings = area_mt_settings(area, &mt_count); | |
892 | for (unsigned int i = 0; i < mt_count; i++) { | |
af8ac8f9 CF |
893 | isis_tlvs_add_mt_router_info( |
894 | lsp->tlvs, mt_settings[i]->mtid, | |
895 | mt_settings[i]->overload, false); | |
d62a17ae | 896 | lsp_debug("ISIS (%s): MT %s", area->area_tag, |
af8ac8f9 | 897 | isis_mtid2str(mt_settings[i]->mtid)); |
aa4376ec | 898 | } |
d62a17ae | 899 | } else { |
900 | lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)", | |
901 | area->area_tag); | |
902 | } | |
903 | /* Dynamic Hostname */ | |
904 | if (area->dynhostname) { | |
6b3ee3a0 | 905 | isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get()); |
af8ac8f9 | 906 | lsp_debug("ISIS (%s): Adding dynamic hostname '%s'", |
6b3ee3a0 | 907 | area->area_tag, cmd_hostname_get()); |
d62a17ae | 908 | } else { |
909 | lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)", | |
910 | area->area_tag); | |
911 | } | |
912 | ||
1b3f47d0 OD |
913 | /* IPv4 address and TE router ID TLVs. |
914 | * In case of the first one we don't follow "C" vendor, | |
915 | * but "J" vendor behavior - one IPv4 address is put | |
916 | * into LSP. TE router ID will be the same if MPLS-TE | |
917 | * is not activate or MPLS-TE router-id not specified | |
918 | */ | |
d62a17ae | 919 | if (isis->router_id != 0) { |
af8ac8f9 CF |
920 | struct in_addr id = {.s_addr = isis->router_id}; |
921 | inet_ntop(AF_INET, &id, buf, sizeof(buf)); | |
d62a17ae | 922 | lsp_debug("ISIS (%s): Adding router ID %s as IPv4 tlv.", |
923 | area->area_tag, buf); | |
af8ac8f9 | 924 | isis_tlvs_add_ipv4_address(lsp->tlvs, &id); |
d62a17ae | 925 | |
1b3f47d0 OD |
926 | /* If new style TLV's are in use, add TE router ID TLV |
927 | * Check if MPLS-TE is activate and mpls-te router-id set | |
928 | * otherwise add exactly same data as for IPv4 address | |
929 | */ | |
d62a17ae | 930 | if (area->newmetric) { |
1b3f47d0 OD |
931 | if (IS_MPLS_TE(area->mta) |
932 | && area->mta->router_id.s_addr != 0) | |
933 | id.s_addr = area->mta->router_id.s_addr; | |
d62a17ae | 934 | lsp_debug( |
935 | "ISIS (%s): Adding router ID also as TE router ID tlv.", | |
936 | area->area_tag); | |
af8ac8f9 | 937 | isis_tlvs_set_te_router_id(lsp->tlvs, &id); |
aa4376ec | 938 | } |
d62a17ae | 939 | } else { |
940 | lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.", | |
941 | area->area_tag); | |
942 | } | |
943 | ||
d62a17ae | 944 | lsp_debug("ISIS (%s): Adding circuit specific information.", |
945 | area->area_tag); | |
946 | ||
92ed0cde CF |
947 | if (fabricd) { |
948 | lsp_debug( | |
949 | "ISIS (%s): Adding tier %" PRIu8 " spine-leaf-extension tlv.", | |
950 | area->area_tag, fabricd_tier(area)); | |
951 | isis_tlvs_add_spine_leaf(lsp->tlvs, fabricd_tier(area), true, | |
952 | false, false, false); | |
953 | } | |
954 | ||
af8ac8f9 | 955 | struct isis_circuit *circuit; |
d62a17ae | 956 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit)) { |
957 | if (!circuit->interface) | |
958 | lsp_debug( | |
959 | "ISIS (%s): Processing %s circuit %p with unknown interface", | |
960 | area->area_tag, | |
961 | circuit_type2string(circuit->circ_type), | |
962 | circuit); | |
963 | else | |
964 | lsp_debug("ISIS (%s): Processing %s circuit %s", | |
965 | area->area_tag, | |
966 | circuit_type2string(circuit->circ_type), | |
967 | circuit->interface->name); | |
968 | ||
969 | if (circuit->state != C_STATE_UP) { | |
970 | lsp_debug("ISIS (%s): Circuit is not up, ignoring.", | |
971 | area->area_tag); | |
972 | continue; | |
aa4376ec | 973 | } |
d62a17ae | 974 | |
af8ac8f9 CF |
975 | uint32_t metric = area->oldmetric |
976 | ? circuit->metric[level - 1] | |
977 | : circuit->te_metric[level - 1]; | |
978 | ||
d62a17ae | 979 | if (circuit->ip_router && circuit->ip_addrs |
980 | && circuit->ip_addrs->count > 0) { | |
981 | lsp_debug( | |
982 | "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.", | |
983 | area->area_tag); | |
af8ac8f9 CF |
984 | struct listnode *ipnode; |
985 | struct prefix_ipv4 *ipv4; | |
986 | for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, ipnode, | |
987 | ipv4)) { | |
988 | if (area->oldmetric) { | |
d62a17ae | 989 | lsp_debug( |
af8ac8f9 CF |
990 | "ISIS (%s): Adding old-style IP reachability for %s", |
991 | area->area_tag, | |
992 | prefix2str(ipv4, buf, | |
993 | sizeof(buf))); | |
994 | isis_tlvs_add_oldstyle_ip_reach( | |
995 | lsp->tlvs, ipv4, metric); | |
d62a17ae | 996 | } |
af8ac8f9 CF |
997 | |
998 | if (area->newmetric) { | |
d62a17ae | 999 | lsp_debug( |
af8ac8f9 CF |
1000 | "ISIS (%s): Adding te-style IP reachability for %s", |
1001 | area->area_tag, | |
1002 | prefix2str(ipv4, buf, | |
1003 | sizeof(buf))); | |
1004 | isis_tlvs_add_extended_ip_reach( | |
1005 | lsp->tlvs, ipv4, metric); | |
d62a17ae | 1006 | } |
1007 | } | |
f390d2c7 | 1008 | } |
d62a17ae | 1009 | |
d62a17ae | 1010 | if (circuit->ipv6_router && circuit->ipv6_non_link |
1011 | && circuit->ipv6_non_link->count > 0) { | |
af8ac8f9 CF |
1012 | struct listnode *ipnode; |
1013 | struct prefix_ipv6 *ipv6; | |
1b3f47d0 | 1014 | |
d62a17ae | 1015 | for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, |
1016 | ipnode, ipv6)) { | |
d62a17ae | 1017 | lsp_debug( |
af8ac8f9 CF |
1018 | "ISIS (%s): Adding IPv6 reachability for %s", |
1019 | area->area_tag, | |
1020 | prefix2str(ipv6, buf, sizeof(buf))); | |
1021 | isis_tlvs_add_ipv6_reach( | |
1022 | lsp->tlvs, | |
1023 | isis_area_ipv6_topology(area), ipv6, | |
1024 | metric); | |
d62a17ae | 1025 | } |
aa4376ec | 1026 | } |
d62a17ae | 1027 | |
1028 | switch (circuit->circ_type) { | |
1029 | case CIRCUIT_T_BROADCAST: | |
1030 | if (level & circuit->is_type) { | |
af8ac8f9 CF |
1031 | uint8_t *ne_id = |
1032 | (level == IS_LEVEL_1) | |
1033 | ? circuit->u.bc.l1_desig_is | |
1034 | : circuit->u.bc.l2_desig_is; | |
1035 | ||
1036 | if (LSP_PSEUDO_ID(ne_id)) { | |
1037 | if (area->oldmetric) { | |
d62a17ae | 1038 | lsp_debug( |
1039 | "ISIS (%s): Adding DIS %s.%02x as old-style neighbor", | |
1040 | area->area_tag, | |
af8ac8f9 CF |
1041 | sysid_print(ne_id), |
1042 | LSP_PSEUDO_ID(ne_id)); | |
1043 | isis_tlvs_add_oldstyle_reach( | |
1044 | lsp->tlvs, ne_id, | |
1045 | metric); | |
d62a17ae | 1046 | } |
1b3f47d0 | 1047 | if (area->newmetric) |
d62a17ae | 1048 | tlvs_add_mt_bcast( |
af8ac8f9 | 1049 | lsp->tlvs, circuit, |
1b3f47d0 | 1050 | level, ne_id, metric); |
d62a17ae | 1051 | } |
1052 | } else { | |
1053 | lsp_debug( | |
1054 | "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors", | |
1055 | area->area_tag); | |
1056 | } | |
1057 | break; | |
af8ac8f9 CF |
1058 | case CIRCUIT_T_P2P: { |
1059 | struct isis_adjacency *nei = circuit->u.p2p.neighbor; | |
44b89511 CF |
1060 | if (nei && nei->adj_state == ISIS_ADJ_UP |
1061 | && (level & nei->circuit_t)) { | |
af8ac8f9 CF |
1062 | uint8_t ne_id[7]; |
1063 | memcpy(ne_id, nei->sysid, ISIS_SYS_ID_LEN); | |
1064 | LSP_PSEUDO_ID(ne_id) = 0; | |
1065 | ||
d62a17ae | 1066 | if (area->oldmetric) { |
d62a17ae | 1067 | lsp_debug( |
1068 | "ISIS (%s): Adding old-style is reach for %s", | |
1069 | area->area_tag, | |
af8ac8f9 CF |
1070 | sysid_print(ne_id)); |
1071 | isis_tlvs_add_oldstyle_reach( | |
1072 | lsp->tlvs, ne_id, metric); | |
d62a17ae | 1073 | } |
1074 | if (area->newmetric) { | |
a191178d CF |
1075 | uint32_t neighbor_metric; |
1076 | if (fabricd_tier(area) == 0) { | |
1077 | neighbor_metric = 0xffe; | |
1078 | } else { | |
1079 | neighbor_metric = metric; | |
1080 | } | |
1081 | ||
af8ac8f9 | 1082 | tlvs_add_mt_p2p(lsp->tlvs, circuit, |
1b3f47d0 | 1083 | ne_id, neighbor_metric); |
d62a17ae | 1084 | } |
1085 | } else { | |
1086 | lsp_debug( | |
1087 | "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors", | |
1088 | area->area_tag); | |
1089 | } | |
af8ac8f9 | 1090 | } break; |
d62a17ae | 1091 | case CIRCUIT_T_LOOPBACK: |
1092 | break; | |
1093 | default: | |
1094 | zlog_warn("lsp_area_create: unknown circuit type"); | |
aa4376ec | 1095 | } |
d62a17ae | 1096 | } |
1097 | ||
af8ac8f9 | 1098 | lsp_build_ext_reach(lsp, area); |
d62a17ae | 1099 | |
af8ac8f9 CF |
1100 | struct isis_tlvs *tlvs = lsp->tlvs; |
1101 | lsp->tlvs = NULL; | |
d62a17ae | 1102 | |
d07067ba | 1103 | lsp_adjust_stream(lsp); |
af8ac8f9 CF |
1104 | lsp_pack_pdu(lsp); |
1105 | size_t tlv_space = STREAM_WRITEABLE(lsp->pdu) - LLC_LEN; | |
1106 | lsp_clear_data(lsp); | |
d62a17ae | 1107 | |
af8ac8f9 CF |
1108 | struct list *fragments = isis_fragment_tlvs(tlvs, tlv_space); |
1109 | if (!fragments) { | |
1110 | zlog_warn("BUG: could not fragment own LSP:"); | |
996c9314 LB |
1111 | log_multiline(LOG_WARNING, " ", "%s", |
1112 | isis_format_tlvs(tlvs)); | |
af8ac8f9 CF |
1113 | isis_free_tlvs(tlvs); |
1114 | return; | |
d62a17ae | 1115 | } |
af8ac8f9 | 1116 | isis_free_tlvs(tlvs); |
d62a17ae | 1117 | |
789c4dfc | 1118 | bool fragment_overflow = false; |
af8ac8f9 CF |
1119 | frag = lsp; |
1120 | for (ALL_LIST_ELEMENTS_RO(fragments, node, tlvs)) { | |
1121 | if (node != listhead(fragments)) { | |
789c4dfc CF |
1122 | if (LSP_FRAGMENT(frag->hdr.lsp_id) == 255) { |
1123 | if (!fragment_overflow) { | |
1124 | fragment_overflow = true; | |
996c9314 LB |
1125 | zlog_warn( |
1126 | "ISIS (%s): Too much information for 256 fragments", | |
1127 | area->area_tag); | |
789c4dfc CF |
1128 | } |
1129 | isis_free_tlvs(tlvs); | |
1130 | continue; | |
1131 | } | |
1132 | ||
af8ac8f9 CF |
1133 | frag = lsp_next_frag(LSP_FRAGMENT(frag->hdr.lsp_id) + 1, |
1134 | lsp, area, level); | |
d07067ba | 1135 | lsp_adjust_stream(frag); |
d62a17ae | 1136 | } |
af8ac8f9 | 1137 | frag->tlvs = tlvs; |
d62a17ae | 1138 | } |
1139 | ||
6a154c88 | 1140 | list_delete(&fragments); |
af8ac8f9 CF |
1141 | lsp_debug("ISIS (%s): LSP construction is complete. Serializing...", |
1142 | area->area_tag); | |
d62a17ae | 1143 | return; |
eb5d44eb | 1144 | } |
eb5d44eb | 1145 | |
1146 | /* | |
3f045a08 | 1147 | * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs |
eb5d44eb | 1148 | */ |
d62a17ae | 1149 | int lsp_generate(struct isis_area *area, int level) |
f390d2c7 | 1150 | { |
d62a17ae | 1151 | struct isis_lsp *oldlsp, *newlsp; |
d7c0a89a QY |
1152 | uint32_t seq_num = 0; |
1153 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1154 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1155 | |
1156 | if ((area == NULL) || (area->is_type & level) != level) | |
1157 | return ISIS_ERROR; | |
1158 | ||
1159 | memset(&lspid, 0, ISIS_SYS_ID_LEN + 2); | |
1160 | memcpy(&lspid, isis->sysid, ISIS_SYS_ID_LEN); | |
1161 | ||
1162 | /* only builds the lsp if the area shares the level */ | |
4bef0ec4 | 1163 | oldlsp = lsp_search(&area->lspdb[level - 1], lspid); |
d62a17ae | 1164 | if (oldlsp) { |
1165 | /* FIXME: we should actually initiate a purge */ | |
af8ac8f9 | 1166 | seq_num = oldlsp->hdr.seqno; |
4bef0ec4 DL |
1167 | lsp_search_and_destroy(&area->lspdb[level - 1], |
1168 | oldlsp->hdr.lsp_id); | |
d62a17ae | 1169 | } |
1170 | rem_lifetime = lsp_rem_lifetime(area, level); | |
1171 | newlsp = | |
1172 | lsp_new(area, lspid, rem_lifetime, seq_num, | |
1173 | area->is_type | area->overload_bit | area->attached_bit, | |
8f5dbe18 | 1174 | 0, NULL, level); |
d62a17ae | 1175 | newlsp->area = area; |
1176 | newlsp->own_lsp = 1; | |
1177 | ||
4bef0ec4 | 1178 | lsp_insert(&area->lspdb[level - 1], newlsp); |
d62a17ae | 1179 | /* build_lsp_data (newlsp, area); */ |
1180 | lsp_build(newlsp, area); | |
1181 | /* time to calculate our checksum */ | |
af8ac8f9 | 1182 | lsp_seqno_update(newlsp); |
d62a17ae | 1183 | newlsp->last_generated = time(NULL); |
9b39405f | 1184 | lsp_flood(newlsp, NULL); |
062f4d36 | 1185 | area->lsp_gen_count[level - 1]++; |
d62a17ae | 1186 | |
1187 | refresh_time = lsp_refresh_time(newlsp, rem_lifetime); | |
1188 | ||
1189 | THREAD_TIMER_OFF(area->t_lsp_refresh[level - 1]); | |
1190 | area->lsp_regenerate_pending[level - 1] = 0; | |
9196731f CF |
1191 | thread_add_timer(master, lsp_refresh, |
1192 | &area->lsp_refresh_arg[level - 1], refresh_time, | |
1193 | &area->t_lsp_refresh[level - 1]); | |
d62a17ae | 1194 | |
1195 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
af8ac8f9 CF |
1196 | zlog_debug("ISIS-Upd (%s): Building L%d LSP %s, len %" PRIu16 |
1197 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1198 | ", lifetime %" PRIu16 "s refresh %" PRIu16 "s", | |
1199 | area->area_tag, level, | |
1200 | rawlspid_print(newlsp->hdr.lsp_id), | |
1201 | newlsp->hdr.pdu_len, newlsp->hdr.seqno, | |
1202 | newlsp->hdr.checksum, newlsp->hdr.rem_lifetime, | |
1203 | refresh_time); | |
d62a17ae | 1204 | } |
1205 | sched_debug( | |
1206 | "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.", | |
1207 | area->area_tag, level); | |
1208 | ||
998011fa EDP |
1209 | #ifndef FABRICD |
1210 | /* send northbound notification */ | |
1211 | isis_notif_lsp_gen(area, rawlspid_print(newlsp->hdr.lsp_id), | |
1212 | newlsp->hdr.seqno, newlsp->last_generated); | |
1213 | #endif /* ifndef FABRICD */ | |
1214 | ||
d62a17ae | 1215 | return ISIS_OK; |
eb5d44eb | 1216 | } |
1217 | ||
1218 | /* | |
9b39405f | 1219 | * Search own LSPs, update holding time and flood |
eb5d44eb | 1220 | */ |
d62a17ae | 1221 | static int lsp_regenerate(struct isis_area *area, int level) |
eb5d44eb | 1222 | { |
4bef0ec4 | 1223 | struct lspdb_head *head; |
d62a17ae | 1224 | struct isis_lsp *lsp, *frag; |
1225 | struct listnode *node; | |
d7c0a89a QY |
1226 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; |
1227 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1228 | |
1229 | if ((area == NULL) || (area->is_type & level) != level) | |
1230 | return ISIS_ERROR; | |
1231 | ||
4bef0ec4 | 1232 | head = &area->lspdb[level - 1]; |
d62a17ae | 1233 | |
1234 | memset(lspid, 0, ISIS_SYS_ID_LEN + 2); | |
1235 | memcpy(lspid, isis->sysid, ISIS_SYS_ID_LEN); | |
1236 | ||
4bef0ec4 | 1237 | lsp = lsp_search(head, lspid); |
d62a17ae | 1238 | |
1239 | if (!lsp) { | |
450971aa | 1240 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 QY |
1241 | "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!", |
1242 | area->area_tag, level); | |
d62a17ae | 1243 | return ISIS_ERROR; |
1244 | } | |
1245 | ||
1246 | lsp_clear_data(lsp); | |
1247 | lsp_build(lsp, area); | |
d62a17ae | 1248 | rem_lifetime = lsp_rem_lifetime(area, level); |
af8ac8f9 | 1249 | lsp->hdr.rem_lifetime = rem_lifetime; |
d62a17ae | 1250 | lsp->last_generated = time(NULL); |
9b39405f | 1251 | lsp_flood(lsp, NULL); |
062f4d36 | 1252 | area->lsp_gen_count[level - 1]++; |
d62a17ae | 1253 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { |
8f27aa27 CF |
1254 | if (!frag->tlvs) { |
1255 | /* Updating and flooding should only affect fragments | |
1256 | * carrying data | |
1257 | */ | |
1258 | continue; | |
1259 | } | |
1260 | ||
af8ac8f9 | 1261 | frag->hdr.lsp_bits = lsp_bits_generate( |
d62a17ae | 1262 | level, area->overload_bit, area->attached_bit); |
1263 | /* Set the lifetime values of all the fragments to the same | |
1264 | * value, | |
1265 | * so that no fragment expires before the lsp is refreshed. | |
1266 | */ | |
af8ac8f9 | 1267 | frag->hdr.rem_lifetime = rem_lifetime; |
0b8b6cab | 1268 | frag->age_out = ZERO_AGE_LIFETIME; |
9b39405f | 1269 | lsp_flood(frag, NULL); |
d62a17ae | 1270 | } |
af8ac8f9 | 1271 | lsp_seqno_update(lsp); |
d62a17ae | 1272 | |
1273 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
9196731f CF |
1274 | thread_add_timer(master, lsp_refresh, |
1275 | &area->lsp_refresh_arg[level - 1], refresh_time, | |
1276 | &area->t_lsp_refresh[level - 1]); | |
d62a17ae | 1277 | area->lsp_regenerate_pending[level - 1] = 0; |
1278 | ||
1279 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1280 | zlog_debug( | |
af8ac8f9 CF |
1281 | "ISIS-Upd (%s): Refreshed our L%d LSP %s, len %" PRIu16 |
1282 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1283 | ", lifetime %" PRIu16 "s refresh %" PRIu16 "s", | |
1284 | area->area_tag, level, rawlspid_print(lsp->hdr.lsp_id), | |
1285 | lsp->hdr.pdu_len, lsp->hdr.seqno, lsp->hdr.checksum, | |
1286 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1287 | } |
1288 | sched_debug( | |
1289 | "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.", | |
1290 | area->area_tag, level); | |
1291 | ||
1292 | return ISIS_OK; | |
eb5d44eb | 1293 | } |
1294 | ||
eb5d44eb | 1295 | /* |
3f045a08 | 1296 | * Something has changed or periodic refresh -> regenerate LSP |
eb5d44eb | 1297 | */ |
9196731f | 1298 | static int lsp_refresh(struct thread *thread) |
eb5d44eb | 1299 | { |
9196731f | 1300 | struct lsp_refresh_arg *arg = THREAD_ARG(thread); |
d70f99e1 | 1301 | |
9196731f | 1302 | assert(arg); |
eb5d44eb | 1303 | |
9196731f | 1304 | struct isis_area *area = arg->area; |
eb5d44eb | 1305 | |
d62a17ae | 1306 | assert(area); |
f390d2c7 | 1307 | |
9196731f | 1308 | int level = arg->level; |
f390d2c7 | 1309 | |
9196731f CF |
1310 | area->t_lsp_refresh[level - 1] = NULL; |
1311 | area->lsp_regenerate_pending[level - 1] = 0; | |
1312 | ||
1313 | if ((area->is_type & level) == 0) | |
d62a17ae | 1314 | return ISIS_ERROR; |
3f045a08 | 1315 | |
01c3745f | 1316 | if (monotime_since(&area->last_lsp_refresh_event[level - 1], NULL) < 100000L) { |
f93025e1 CF |
1317 | sched_debug("ISIS (%s): Still unstable, postpone LSP L%d refresh", |
1318 | area->area_tag, level); | |
1319 | _lsp_regenerate_schedule(area, level, 0, false, | |
1320 | __func__, __FILE__, __LINE__); | |
1321 | return 0; | |
1322 | } | |
1323 | ||
d62a17ae | 1324 | sched_debug( |
9196731f CF |
1325 | "ISIS (%s): LSP L%d refresh timer expired. Refreshing LSP...", |
1326 | area->area_tag, level); | |
1327 | return lsp_regenerate(area, level); | |
eb5d44eb | 1328 | } |
1329 | ||
691f3e76 | 1330 | int _lsp_regenerate_schedule(struct isis_area *area, int level, |
f93025e1 CF |
1331 | int all_pseudo, bool postpone, |
1332 | const char *func, const char *file, | |
1333 | int line) | |
eb5d44eb | 1334 | { |
d62a17ae | 1335 | struct isis_lsp *lsp; |
d7c0a89a | 1336 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1337 | time_t now, diff; |
1338 | long timeout; | |
1339 | struct listnode *cnode; | |
1340 | struct isis_circuit *circuit; | |
1341 | int lvl; | |
1342 | ||
1343 | if (area == NULL) | |
1344 | return ISIS_ERROR; | |
1345 | ||
1346 | sched_debug( | |
691f3e76 CF |
1347 | "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs" |
1348 | " Caller: %s %s:%d", | |
d62a17ae | 1349 | area->area_tag, circuit_t2string(level), |
691f3e76 CF |
1350 | all_pseudo ? "" : "not ", |
1351 | func, file, line); | |
d62a17ae | 1352 | |
1353 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1354 | LSP_PSEUDO_ID(id) = LSP_FRAGMENT(id) = 0; | |
1355 | now = time(NULL); | |
1356 | ||
1357 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1358 | if (!((level & lvl) && (area->is_type & lvl))) | |
1359 | continue; | |
1360 | ||
f93025e1 CF |
1361 | if (postpone) { |
1362 | monotime(&area->last_lsp_refresh_event[lvl - 1]); | |
1363 | } | |
1364 | ||
d62a17ae | 1365 | sched_debug( |
1366 | "ISIS (%s): Checking whether L%d needs to be scheduled", | |
1367 | area->area_tag, lvl); | |
1368 | ||
1369 | if (area->lsp_regenerate_pending[lvl - 1]) { | |
1370 | struct timeval remain = thread_timer_remain( | |
1371 | area->t_lsp_refresh[lvl - 1]); | |
1372 | sched_debug( | |
1373 | "ISIS (%s): Regeneration is already pending, nothing todo." | |
1374 | " (Due in %lld.%03lld seconds)", | |
1375 | area->area_tag, (long long)remain.tv_sec, | |
1376 | (long long)remain.tv_usec / 1000); | |
1377 | continue; | |
1378 | } | |
1379 | ||
4bef0ec4 | 1380 | lsp = lsp_search(&area->lspdb[lvl - 1], id); |
d62a17ae | 1381 | if (!lsp) { |
1382 | sched_debug( | |
1383 | "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.", | |
1384 | area->area_tag); | |
1385 | continue; | |
1386 | } | |
1387 | ||
1388 | /* | |
1389 | * Throttle avoidance | |
1390 | */ | |
1391 | sched_debug( | |
1392 | "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld", | |
1393 | area->area_tag, (long long)lsp->last_generated, | |
1394 | (long long)now); | |
1395 | THREAD_TIMER_OFF(area->t_lsp_refresh[lvl - 1]); | |
1396 | diff = now - lsp->last_generated; | |
1397 | if (diff < area->lsp_gen_interval[lvl - 1]) { | |
1398 | timeout = | |
1399 | 1000 * (area->lsp_gen_interval[lvl - 1] - diff); | |
1400 | sched_debug( | |
1401 | "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval", | |
1402 | area->area_tag, timeout); | |
1403 | } else { | |
1404 | /* | |
1405 | * lsps are not regenerated if lsp_regenerate function | |
1406 | * is called | |
1407 | * directly. However if the lsp_regenerate call is | |
1408 | * queued for | |
1409 | * later execution it works. | |
1410 | */ | |
1411 | timeout = 100; | |
1412 | sched_debug( | |
1413 | "ISIS (%s): Last generation was more than lsp_gen_interval ago." | |
1414 | " Scheduling for execution in %ld ms.", | |
1415 | area->area_tag, timeout); | |
1416 | } | |
1417 | ||
1418 | area->lsp_regenerate_pending[lvl - 1] = 1; | |
9196731f CF |
1419 | thread_add_timer_msec(master, lsp_refresh, |
1420 | &area->lsp_refresh_arg[lvl - 1], | |
1421 | timeout, | |
1422 | &area->t_lsp_refresh[lvl - 1]); | |
d62a17ae | 1423 | } |
1424 | ||
1425 | if (all_pseudo) { | |
1426 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, cnode, circuit)) | |
1427 | lsp_regenerate_schedule_pseudo(circuit, level); | |
1428 | } | |
1429 | ||
1430 | return ISIS_OK; | |
eb5d44eb | 1431 | } |
1432 | ||
1433 | /* | |
1434 | * Funcs for pseudonode LSPs | |
1435 | */ | |
1436 | ||
1437 | /* | |
d62a17ae | 1438 | * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs |
eb5d44eb | 1439 | */ |
d62a17ae | 1440 | static void lsp_build_pseudo(struct isis_lsp *lsp, struct isis_circuit *circuit, |
1441 | int level) | |
eb5d44eb | 1442 | { |
d62a17ae | 1443 | struct isis_adjacency *adj; |
d62a17ae | 1444 | struct list *adj_list; |
1445 | struct listnode *node; | |
1446 | struct isis_area *area = circuit->area; | |
1447 | ||
af8ac8f9 CF |
1448 | lsp_clear_data(lsp); |
1449 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 1450 | lsp_debug( |
1451 | "ISIS (%s): Constructing pseudo LSP %s for interface %s level %d", | |
af8ac8f9 | 1452 | area->area_tag, rawlspid_print(lsp->hdr.lsp_id), |
d62a17ae | 1453 | circuit->interface->name, level); |
1454 | ||
1455 | lsp->level = level; | |
1456 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
af8ac8f9 | 1457 | lsp->hdr.lsp_bits = |
d62a17ae | 1458 | lsp_bits_generate(level, 0, circuit->area->attached_bit); |
1459 | ||
1460 | /* | |
1461 | * add self to IS neighbours | |
1462 | */ | |
af8ac8f9 CF |
1463 | uint8_t ne_id[ISIS_SYS_ID_LEN + 1]; |
1464 | ||
1465 | memcpy(ne_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1466 | LSP_PSEUDO_ID(ne_id) = 0; | |
d62a17ae | 1467 | |
af8ac8f9 CF |
1468 | if (circuit->area->oldmetric) { |
1469 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
d62a17ae | 1470 | lsp_debug( |
1471 | "ISIS (%s): Adding %s.%02x as old-style neighbor (self)", | |
af8ac8f9 CF |
1472 | area->area_tag, sysid_print(ne_id), |
1473 | LSP_PSEUDO_ID(ne_id)); | |
d62a17ae | 1474 | } |
1475 | if (circuit->area->newmetric) { | |
af8ac8f9 | 1476 | isis_tlvs_add_extended_reach(lsp->tlvs, ISIS_MT_IPV4_UNICAST, |
1b3f47d0 | 1477 | ne_id, 0, circuit->ext); |
d62a17ae | 1478 | lsp_debug( |
1479 | "ISIS (%s): Adding %s.%02x as te-style neighbor (self)", | |
af8ac8f9 CF |
1480 | area->area_tag, sysid_print(ne_id), |
1481 | LSP_PSEUDO_ID(ne_id)); | |
d62a17ae | 1482 | } |
1483 | ||
1484 | adj_list = list_new(); | |
1485 | isis_adj_build_up_list(circuit->u.bc.adjdb[level - 1], adj_list); | |
1486 | ||
1487 | for (ALL_LIST_ELEMENTS_RO(adj_list, node, adj)) { | |
af8ac8f9 | 1488 | if (!(adj->level & level)) { |
d62a17ae | 1489 | lsp_debug( |
1490 | "ISIS (%s): Ignoring neighbor %s, level does not intersect", | |
1491 | area->area_tag, sysid_print(adj->sysid)); | |
af8ac8f9 | 1492 | continue; |
f390d2c7 | 1493 | } |
d62a17ae | 1494 | |
af8ac8f9 CF |
1495 | if (!(level == IS_LEVEL_1 |
1496 | && adj->sys_type == ISIS_SYSTYPE_L1_IS) | |
1497 | && !(level == IS_LEVEL_1 | |
1498 | && adj->sys_type == ISIS_SYSTYPE_L2_IS | |
1499 | && adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
1500 | && !(level == IS_LEVEL_2 | |
1501 | && adj->sys_type == ISIS_SYSTYPE_L2_IS)) { | |
1502 | lsp_debug( | |
1503 | "ISIS (%s): Ignoring neighbor %s, level does not match", | |
1504 | area->area_tag, sysid_print(adj->sysid)); | |
1505 | continue; | |
1506 | } | |
d62a17ae | 1507 | |
af8ac8f9 CF |
1508 | memcpy(ne_id, adj->sysid, ISIS_SYS_ID_LEN); |
1509 | if (circuit->area->oldmetric) { | |
1510 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
1511 | lsp_debug( | |
1512 | "ISIS (%s): Adding %s.%02x as old-style neighbor (peer)", | |
1513 | area->area_tag, sysid_print(ne_id), | |
1514 | LSP_PSEUDO_ID(ne_id)); | |
1515 | } | |
1516 | if (circuit->area->newmetric) { | |
1517 | isis_tlvs_add_extended_reach(lsp->tlvs, | |
1518 | ISIS_MT_IPV4_UNICAST, | |
1b3f47d0 | 1519 | ne_id, 0, circuit->ext); |
af8ac8f9 CF |
1520 | lsp_debug( |
1521 | "ISIS (%s): Adding %s.%02x as te-style neighbor (peer)", | |
1522 | area->area_tag, sysid_print(ne_id), | |
1523 | LSP_PSEUDO_ID(ne_id)); | |
1524 | } | |
1525 | } | |
6a154c88 | 1526 | list_delete(&adj_list); |
d62a17ae | 1527 | return; |
eb5d44eb | 1528 | } |
1529 | ||
d62a17ae | 1530 | int lsp_generate_pseudo(struct isis_circuit *circuit, int level) |
3f045a08 | 1531 | { |
4bef0ec4 | 1532 | struct lspdb_head *head = &circuit->area->lspdb[level - 1]; |
d62a17ae | 1533 | struct isis_lsp *lsp; |
d7c0a89a QY |
1534 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
1535 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1536 | |
1537 | if ((circuit->is_type & level) != level | |
1538 | || (circuit->state != C_STATE_UP) | |
1539 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1540 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1541 | return ISIS_ERROR; | |
1542 | ||
1543 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1544 | LSP_FRAGMENT(lsp_id) = 0; | |
1545 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1546 | ||
1547 | /* | |
1548 | * If for some reason have a pseudo LSP in the db already -> regenerate | |
1549 | */ | |
4bef0ec4 | 1550 | if (lsp_search(head, lsp_id)) |
d62a17ae | 1551 | return lsp_regenerate_schedule_pseudo(circuit, level); |
1552 | ||
1553 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); | |
1554 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
1555 | lsp = lsp_new(circuit->area, lsp_id, rem_lifetime, 1, | |
1556 | circuit->area->is_type | circuit->area->attached_bit, 0, | |
8f5dbe18 | 1557 | NULL, level); |
d62a17ae | 1558 | lsp->area = circuit->area; |
1559 | ||
1560 | lsp_build_pseudo(lsp, circuit, level); | |
af8ac8f9 | 1561 | lsp_pack_pdu(lsp); |
d62a17ae | 1562 | lsp->own_lsp = 1; |
4bef0ec4 | 1563 | lsp_insert(head, lsp); |
9b39405f | 1564 | lsp_flood(lsp, NULL); |
d62a17ae | 1565 | |
1566 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1567 | THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1568 | circuit->lsp_regenerate_pending[level - 1] = 0; | |
1569 | if (level == IS_LEVEL_1) | |
1570 | thread_add_timer( | |
1571 | master, lsp_l1_refresh_pseudo, circuit, refresh_time, | |
1572 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1573 | else if (level == IS_LEVEL_2) | |
1574 | thread_add_timer( | |
1575 | master, lsp_l2_refresh_pseudo, circuit, refresh_time, | |
1576 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1577 | ||
1578 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1579 | zlog_debug( | |
af8ac8f9 CF |
1580 | "ISIS-Upd (%s): Built L%d Pseudo LSP %s, len %" PRIu16 |
1581 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1582 | ", lifetime %" PRIu16 "s, refresh %" PRIu16 "s", | |
d62a17ae | 1583 | circuit->area->area_tag, level, |
af8ac8f9 CF |
1584 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len, |
1585 | lsp->hdr.seqno, lsp->hdr.checksum, | |
1586 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1587 | } |
1588 | ||
1589 | return ISIS_OK; | |
3f045a08 JB |
1590 | } |
1591 | ||
d62a17ae | 1592 | static int lsp_regenerate_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1593 | { |
4bef0ec4 | 1594 | struct lspdb_head *head = &circuit->area->lspdb[level - 1]; |
d62a17ae | 1595 | struct isis_lsp *lsp; |
d7c0a89a QY |
1596 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
1597 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1598 | |
1599 | if ((circuit->is_type & level) != level | |
1600 | || (circuit->state != C_STATE_UP) | |
1601 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1602 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1603 | return ISIS_ERROR; | |
1604 | ||
1605 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1606 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1607 | LSP_FRAGMENT(lsp_id) = 0; | |
1608 | ||
4bef0ec4 | 1609 | lsp = lsp_search(head, lsp_id); |
d62a17ae | 1610 | |
1611 | if (!lsp) { | |
450971aa | 1612 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 QY |
1613 | "lsp_regenerate_pseudo: no l%d LSP %s found!", level, |
1614 | rawlspid_print(lsp_id)); | |
d62a17ae | 1615 | return ISIS_ERROR; |
1616 | } | |
d62a17ae | 1617 | |
d62a17ae | 1618 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); |
af8ac8f9 CF |
1619 | lsp->hdr.rem_lifetime = rem_lifetime; |
1620 | lsp_build_pseudo(lsp, circuit, level); | |
1621 | lsp_inc_seqno(lsp, 0); | |
d62a17ae | 1622 | lsp->last_generated = time(NULL); |
9b39405f | 1623 | lsp_flood(lsp, NULL); |
d62a17ae | 1624 | |
1625 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1626 | if (level == IS_LEVEL_1) | |
1627 | thread_add_timer( | |
1628 | master, lsp_l1_refresh_pseudo, circuit, refresh_time, | |
1629 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1630 | else if (level == IS_LEVEL_2) | |
1631 | thread_add_timer( | |
1632 | master, lsp_l2_refresh_pseudo, circuit, refresh_time, | |
1633 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
1634 | ||
1635 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
1636 | zlog_debug( | |
af8ac8f9 CF |
1637 | "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %s, len %" PRIu16 |
1638 | ", seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
1639 | ", lifetime %" PRIu16 "s, refresh %" PRIu16 "s", | |
d62a17ae | 1640 | circuit->area->area_tag, level, |
af8ac8f9 CF |
1641 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len, |
1642 | lsp->hdr.seqno, lsp->hdr.checksum, | |
1643 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1644 | } |
1645 | ||
1646 | return ISIS_OK; | |
eb5d44eb | 1647 | } |
1648 | ||
3f045a08 JB |
1649 | /* |
1650 | * Something has changed or periodic refresh -> regenerate pseudo LSP | |
1651 | */ | |
d62a17ae | 1652 | static int lsp_l1_refresh_pseudo(struct thread *thread) |
eb5d44eb | 1653 | { |
d62a17ae | 1654 | struct isis_circuit *circuit; |
d7c0a89a | 1655 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
eb5d44eb | 1656 | |
d62a17ae | 1657 | circuit = THREAD_ARG(thread); |
f390d2c7 | 1658 | |
d62a17ae | 1659 | circuit->u.bc.t_refresh_pseudo_lsp[0] = NULL; |
1660 | circuit->lsp_regenerate_pending[0] = 0; | |
13c48f72 | 1661 | |
d62a17ae | 1662 | if ((circuit->u.bc.is_dr[0] == 0) |
1663 | || (circuit->is_type & IS_LEVEL_1) == 0) { | |
1664 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1665 | LSP_PSEUDO_ID(id) = circuit->circuit_id; | |
1666 | LSP_FRAGMENT(id) = 0; | |
1667 | lsp_purge_pseudo(id, circuit, IS_LEVEL_1); | |
1668 | return ISIS_ERROR; | |
1669 | } | |
eb5d44eb | 1670 | |
d62a17ae | 1671 | return lsp_regenerate_pseudo(circuit, IS_LEVEL_1); |
eb5d44eb | 1672 | } |
1673 | ||
d62a17ae | 1674 | static int lsp_l2_refresh_pseudo(struct thread *thread) |
eb5d44eb | 1675 | { |
d62a17ae | 1676 | struct isis_circuit *circuit; |
d7c0a89a | 1677 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
f390d2c7 | 1678 | |
d62a17ae | 1679 | circuit = THREAD_ARG(thread); |
f390d2c7 | 1680 | |
d62a17ae | 1681 | circuit->u.bc.t_refresh_pseudo_lsp[1] = NULL; |
1682 | circuit->lsp_regenerate_pending[1] = 0; | |
13c48f72 | 1683 | |
d62a17ae | 1684 | if ((circuit->u.bc.is_dr[1] == 0) |
1685 | || (circuit->is_type & IS_LEVEL_2) == 0) { | |
1686 | memcpy(id, isis->sysid, ISIS_SYS_ID_LEN); | |
1687 | LSP_PSEUDO_ID(id) = circuit->circuit_id; | |
1688 | LSP_FRAGMENT(id) = 0; | |
1689 | lsp_purge_pseudo(id, circuit, IS_LEVEL_2); | |
1690 | return ISIS_ERROR; | |
1691 | } | |
eb5d44eb | 1692 | |
d62a17ae | 1693 | return lsp_regenerate_pseudo(circuit, IS_LEVEL_2); |
eb5d44eb | 1694 | } |
1695 | ||
d62a17ae | 1696 | int lsp_regenerate_schedule_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1697 | { |
d62a17ae | 1698 | struct isis_lsp *lsp; |
d7c0a89a | 1699 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1700 | time_t now, diff; |
1701 | long timeout; | |
1702 | int lvl; | |
1703 | struct isis_area *area = circuit->area; | |
1704 | ||
1705 | if (circuit->circ_type != CIRCUIT_T_BROADCAST | |
1706 | || circuit->state != C_STATE_UP) | |
1707 | return ISIS_OK; | |
1708 | ||
1709 | sched_debug( | |
1710 | "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s", | |
1711 | area->area_tag, circuit_t2string(level), | |
1712 | circuit->interface->name); | |
1713 | ||
1714 | memcpy(lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1715 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1716 | LSP_FRAGMENT(lsp_id) = 0; | |
1717 | now = time(NULL); | |
1718 | ||
1719 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1720 | sched_debug( | |
1721 | "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled", | |
1722 | area->area_tag, lvl); | |
1723 | ||
1724 | if (!((level & lvl) && (circuit->is_type & lvl))) { | |
1725 | sched_debug("ISIS (%s): Level is not active on circuit", | |
1726 | area->area_tag); | |
1727 | continue; | |
1728 | } | |
1729 | ||
1730 | if (circuit->u.bc.is_dr[lvl - 1] == 0) { | |
1731 | sched_debug( | |
1732 | "ISIS (%s): This IS is not DR, nothing to do.", | |
1733 | area->area_tag); | |
1734 | continue; | |
1735 | } | |
1736 | ||
1737 | if (circuit->lsp_regenerate_pending[lvl - 1]) { | |
1738 | struct timeval remain = thread_timer_remain( | |
1739 | circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1740 | sched_debug( | |
1741 | "ISIS (%s): Regenerate is already pending, nothing todo." | |
1742 | " (Due in %lld.%03lld seconds)", | |
1743 | area->area_tag, (long long)remain.tv_sec, | |
1744 | (long long)remain.tv_usec / 1000); | |
1745 | continue; | |
1746 | } | |
1747 | ||
4bef0ec4 | 1748 | lsp = lsp_search(&circuit->area->lspdb[lvl - 1], lsp_id); |
d62a17ae | 1749 | if (!lsp) { |
1750 | sched_debug( | |
1751 | "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.", | |
1752 | area->area_tag); | |
1753 | continue; | |
1754 | } | |
1755 | ||
1756 | /* | |
1757 | * Throttle avoidance | |
1758 | */ | |
1759 | sched_debug( | |
1760 | "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld", | |
1761 | area->area_tag, (long long)lsp->last_generated, | |
1762 | (long long)now); | |
1763 | THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1764 | diff = now - lsp->last_generated; | |
1765 | if (diff < circuit->area->lsp_gen_interval[lvl - 1]) { | |
9d303b37 DL |
1766 | timeout = |
1767 | 1000 * (circuit->area->lsp_gen_interval[lvl - 1] | |
1768 | - diff); | |
d62a17ae | 1769 | sched_debug( |
1770 | "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval", | |
1771 | area->area_tag, timeout); | |
1772 | } else { | |
1773 | timeout = 100; | |
1774 | sched_debug( | |
1775 | "ISIS (%s): Last generation was more than lsp_gen_interval ago." | |
1776 | " Scheduling for execution in %ld ms.", | |
1777 | area->area_tag, timeout); | |
1778 | } | |
1779 | ||
1780 | circuit->lsp_regenerate_pending[lvl - 1] = 1; | |
1781 | ||
1782 | if (lvl == IS_LEVEL_1) { | |
1783 | thread_add_timer_msec( | |
1784 | master, lsp_l1_refresh_pseudo, circuit, timeout, | |
1785 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1786 | } else if (lvl == IS_LEVEL_2) { | |
1787 | thread_add_timer_msec( | |
1788 | master, lsp_l2_refresh_pseudo, circuit, timeout, | |
1789 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | return ISIS_OK; | |
f390d2c7 | 1794 | } |
eb5d44eb | 1795 | |
1796 | /* | |
1797 | * Walk through LSPs for an area | |
1798 | * - set remaining lifetime | |
eb5d44eb | 1799 | */ |
d62a17ae | 1800 | int lsp_tick(struct thread *thread) |
eb5d44eb | 1801 | { |
d62a17ae | 1802 | struct isis_area *area; |
d62a17ae | 1803 | struct isis_lsp *lsp; |
d62a17ae | 1804 | int level; |
d7c0a89a | 1805 | uint16_t rem_lifetime; |
8e6fb83b | 1806 | bool fabricd_sync_incomplete = false; |
d62a17ae | 1807 | |
d62a17ae | 1808 | area = THREAD_ARG(thread); |
1809 | assert(area); | |
1810 | area->t_tick = NULL; | |
1811 | thread_add_timer(master, lsp_tick, area, 1, &area->t_tick); | |
1812 | ||
8e6fb83b CF |
1813 | struct isis_circuit *fabricd_init_c = fabricd_initial_sync_circuit(area); |
1814 | ||
d62a17ae | 1815 | /* |
9b39405f | 1816 | * Remove LSPs which have aged out |
d62a17ae | 1817 | */ |
1818 | for (level = 0; level < ISIS_LEVELS; level++) { | |
4bef0ec4 | 1819 | struct isis_lsp *next = lspdb_first(&area->lspdb[level]); |
81fddbe7 | 1820 | frr_each_from (lspdb, &area->lspdb[level], lsp, next) { |
4bef0ec4 DL |
1821 | /* |
1822 | * The lsp rem_lifetime is kept at 0 for MaxAge | |
1823 | * or | |
1824 | * ZeroAgeLifetime depending on explicit purge | |
1825 | * or | |
1826 | * natural age out. So schedule spf only once | |
1827 | * when | |
1828 | * the first time rem_lifetime becomes 0. | |
1829 | */ | |
1830 | rem_lifetime = lsp->hdr.rem_lifetime; | |
1831 | lsp_set_time(lsp); | |
d62a17ae | 1832 | |
4bef0ec4 DL |
1833 | /* |
1834 | * Schedule may run spf which should be done | |
1835 | * only after | |
1836 | * the lsp rem_lifetime becomes 0 for the first | |
1837 | * time. | |
1838 | * ISO 10589 - 7.3.16.4 first paragraph. | |
1839 | */ | |
1840 | if (rem_lifetime == 1 && lsp->hdr.seqno != 0) { | |
1841 | /* 7.3.16.4 a) set SRM flags on all */ | |
1842 | /* 7.3.16.4 b) retain only the header */ | |
1843 | if (lsp->area->purge_originator) | |
1844 | lsp_purge(lsp, lsp->level, NULL); | |
1845 | else | |
1846 | lsp_flood(lsp, NULL); | |
1847 | /* 7.3.16.4 c) record the time to purge | |
1848 | * FIXME */ | |
1849 | isis_spf_schedule(lsp->area, lsp->level); | |
1850 | } | |
0c77e178 | 1851 | |
4bef0ec4 DL |
1852 | if (lsp->age_out == 0) { |
1853 | zlog_debug( | |
1854 | "ISIS-Upd (%s): L%u LSP %s seq " | |
1855 | "0x%08" PRIx32 " aged out", | |
1856 | area->area_tag, lsp->level, | |
1857 | rawlspid_print(lsp->hdr.lsp_id), | |
1858 | lsp->hdr.seqno); | |
1859 | ||
1860 | /* if we're aging out fragment 0, lsp_destroy() | |
1861 | * below will delete all other fragments too, | |
1862 | * so we need to skip over those | |
1863 | */ | |
1864 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) | |
1865 | while (next && | |
1866 | !memcmp(next->hdr.lsp_id, | |
1867 | lsp->hdr.lsp_id, | |
1868 | ISIS_SYS_ID_LEN + 1)) | |
1869 | next = lspdb_next( | |
1870 | &area->lspdb[level], | |
1871 | next); | |
1872 | ||
1873 | lspdb_del(&area->lspdb[level], lsp); | |
1874 | lsp_destroy(lsp); | |
1875 | lsp = NULL; | |
1876 | } | |
8e6fb83b | 1877 | |
4bef0ec4 DL |
1878 | if (fabricd_init_c && lsp) { |
1879 | fabricd_sync_incomplete |= | |
1880 | ISIS_CHECK_FLAG(lsp->SSNflags, | |
1881 | fabricd_init_c); | |
d62a17ae | 1882 | } |
1883 | } | |
1884 | } | |
1885 | ||
9b39405f CF |
1886 | if (fabricd_init_c |
1887 | && !fabricd_sync_incomplete | |
1888 | && !isis_tx_queue_len(fabricd_init_c->tx_queue)) { | |
8e6fb83b | 1889 | fabricd_initial_sync_finish(area); |
9b39405f | 1890 | } |
d62a17ae | 1891 | |
1892 | return ISIS_OK; | |
eb5d44eb | 1893 | } |
1894 | ||
d7c0a89a | 1895 | void lsp_purge_pseudo(uint8_t *id, struct isis_circuit *circuit, int level) |
eb5d44eb | 1896 | { |
d62a17ae | 1897 | struct isis_lsp *lsp; |
d62a17ae | 1898 | |
4bef0ec4 | 1899 | lsp = lsp_search(&circuit->area->lspdb[level - 1], id); |
d62a17ae | 1900 | if (!lsp) |
1901 | return; | |
1902 | ||
2c92bee4 | 1903 | lsp_purge(lsp, level, NULL); |
eb5d44eb | 1904 | } |
1905 | ||
1906 | /* | |
d62a17ae | 1907 | * Purge own LSP that is received and we don't have. |
eb5d44eb | 1908 | * -> Do as in 7.3.16.4 |
1909 | */ | |
af8ac8f9 | 1910 | void lsp_purge_non_exist(int level, struct isis_lsp_hdr *hdr, |
d62a17ae | 1911 | struct isis_area *area) |
eb5d44eb | 1912 | { |
d62a17ae | 1913 | struct isis_lsp *lsp; |
1914 | ||
1915 | /* | |
1916 | * We need to create the LSP to be purged | |
1917 | */ | |
1918 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
1919 | lsp->area = area; | |
1920 | lsp->level = level; | |
d07067ba | 1921 | lsp_adjust_stream(lsp); |
af8ac8f9 | 1922 | lsp->age_out = ZERO_AGE_LIFETIME; |
6f004b60 | 1923 | lsp->area->lsp_purge_count[level - 1]++; |
d62a17ae | 1924 | |
af8ac8f9 CF |
1925 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
1926 | lsp->hdr.rem_lifetime = 0; | |
d62a17ae | 1927 | |
2c92bee4 CF |
1928 | lsp_purge_add_poi(lsp, NULL); |
1929 | ||
af8ac8f9 | 1930 | lsp_pack_pdu(lsp); |
d62a17ae | 1931 | |
4bef0ec4 | 1932 | lsp_insert(&area->lspdb[lsp->level - 1], lsp); |
9b39405f | 1933 | lsp_flood(lsp, NULL); |
d62a17ae | 1934 | |
1935 | return; | |
eb5d44eb | 1936 | } |
1937 | ||
9b39405f | 1938 | void lsp_set_all_srmflags(struct isis_lsp *lsp, bool set) |
3f045a08 | 1939 | { |
d62a17ae | 1940 | struct listnode *node; |
1941 | struct isis_circuit *circuit; | |
3f045a08 | 1942 | |
d62a17ae | 1943 | assert(lsp); |
3f045a08 | 1944 | |
9b39405f CF |
1945 | if (!lsp->area) |
1946 | return; | |
3f045a08 | 1947 | |
9b39405f CF |
1948 | struct list *circuit_list = lsp->area->circuit_list; |
1949 | for (ALL_LIST_ELEMENTS_RO(circuit_list, node, circuit)) { | |
1950 | if (set) { | |
1951 | isis_tx_queue_add(circuit->tx_queue, lsp, | |
1952 | TX_LSP_NORMAL); | |
1953 | } else { | |
1954 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
d62a17ae | 1955 | } |
1956 | } | |
3f045a08 | 1957 | } |
9b39405f | 1958 | |
ddb33326 CF |
1959 | void _lsp_flood(struct isis_lsp *lsp, struct isis_circuit *circuit, |
1960 | const char *func, const char *file, int line) | |
9b39405f | 1961 | { |
ddb33326 CF |
1962 | if (isis->debugs & DEBUG_FLOODING) { |
1963 | zlog_debug("Flooding LSP %s%s%s (From %s %s:%d)", | |
1964 | rawlspid_print(lsp->hdr.lsp_id), | |
1965 | circuit ? " except on " : "", | |
1966 | circuit ? circuit->interface->name : "", | |
1967 | func, file, line); | |
1968 | } | |
1969 | ||
37212c41 | 1970 | if (!fabricd) |
9d224819 | 1971 | lsp_set_all_srmflags(lsp, true); |
37212c41 | 1972 | else |
1eb7c3a1 | 1973 | fabricd_lsp_flood(lsp, circuit); |
37212c41 CF |
1974 | |
1975 | if (circuit) | |
1976 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
9b39405f | 1977 | } |
a5b5e946 CF |
1978 | |
1979 | static int lsp_handle_adj_state_change(struct isis_adjacency *adj) | |
1980 | { | |
1981 | lsp_regenerate_schedule(adj->circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0); | |
1982 | return 0; | |
1983 | } | |
1984 | ||
1985 | void lsp_init(void) | |
1986 | { | |
1987 | hook_register(isis_adj_state_change_hook, | |
1988 | lsp_handle_adj_state_change); | |
1989 | } |