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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
eb5d44eb | 2 | /* |
3 | * IS-IS Rout(e)ing protocol - isis_lsp.c | |
4 | * LSP processing | |
5 | * | |
6 | * Copyright (C) 2001,2002 Sampo Saaristo | |
d62a17ae | 7 | * Tampere University of Technology |
eb5d44eb | 8 | * Institute of Communications Engineering |
f3ccedaa | 9 | * Copyright (C) 2013-2015 Christian Franke <chris@opensourcerouting.org> |
eb5d44eb | 10 | */ |
15935e9a | 11 | |
eb5d44eb | 12 | #include <zebra.h> |
eb5d44eb | 13 | |
14 | #include "linklist.h" | |
24a58196 | 15 | #include "frrevent.h" |
eb5d44eb | 16 | #include "vty.h" |
17 | #include "stream.h" | |
18 | #include "memory.h" | |
19 | #include "log.h" | |
20 | #include "prefix.h" | |
21 | #include "command.h" | |
22 | #include "hash.h" | |
23 | #include "if.h" | |
6a270cd9 | 24 | #include "checksum.h" |
3f045a08 | 25 | #include "md5.h" |
f3ccedaa | 26 | #include "table.h" |
d43d2df5 | 27 | #include "srcdest_table.h" |
38937bd5 | 28 | #include "lib_errors.h" |
eb5d44eb | 29 | |
eb5d44eb | 30 | #include "isisd/isis_constants.h" |
31 | #include "isisd/isis_common.h" | |
3f045a08 | 32 | #include "isisd/isis_flags.h" |
eb5d44eb | 33 | #include "isisd/isis_circuit.h" |
34 | #include "isisd/isisd.h" | |
eb5d44eb | 35 | #include "isisd/isis_lsp.h" |
36 | #include "isisd/isis_pdu.h" | |
37 | #include "isisd/isis_dynhn.h" | |
38 | #include "isisd/isis_misc.h" | |
eb5d44eb | 39 | #include "isisd/isis_csm.h" |
40 | #include "isisd/isis_adjacency.h" | |
41 | #include "isisd/isis_spf.h" | |
99894f9a | 42 | #include "isisd/isis_mt.h" |
841791b6 | 43 | #include "isisd/isis_tlvs.h" |
1b3f47d0 | 44 | #include "isisd/isis_te.h" |
26f6acaf | 45 | #include "isisd/isis_sr.h" |
8e6fb83b | 46 | #include "isisd/fabricd.h" |
9b39405f | 47 | #include "isisd/isis_tx_queue.h" |
2a1c520e | 48 | #include "isisd/isis_nb.h" |
78774bbc | 49 | #include "isisd/isis_flex_algo.h" |
eb5d44eb | 50 | |
66b9a381 DL |
51 | DEFINE_MTYPE_STATIC(ISISD, ISIS_LSP, "ISIS LSP"); |
52 | ||
e6685141 DS |
53 | static void lsp_refresh(struct event *thread); |
54 | static void lsp_l1_refresh_pseudo(struct event *thread); | |
55 | static void lsp_l2_refresh_pseudo(struct event *thread); | |
3f045a08 | 56 | |
4bef0ec4 DL |
57 | static void lsp_destroy(struct isis_lsp *lsp); |
58 | ||
49b27ea2 IL |
59 | static bool device_startup; |
60 | ||
d7c0a89a | 61 | int lsp_id_cmp(uint8_t *id1, uint8_t *id2) |
f390d2c7 | 62 | { |
d62a17ae | 63 | return memcmp(id1, id2, ISIS_SYS_ID_LEN + 2); |
eb5d44eb | 64 | } |
65 | ||
4bef0ec4 | 66 | int lspdb_compare(const struct isis_lsp *a, const struct isis_lsp *b) |
eb5d44eb | 67 | { |
4bef0ec4 | 68 | return memcmp(a->hdr.lsp_id, b->hdr.lsp_id, sizeof(a->hdr.lsp_id)); |
eb5d44eb | 69 | } |
70 | ||
4bef0ec4 | 71 | void lsp_db_init(struct lspdb_head *head) |
eb5d44eb | 72 | { |
4bef0ec4 DL |
73 | lspdb_init(head); |
74 | } | |
d62a17ae | 75 | |
4bef0ec4 DL |
76 | void lsp_db_fini(struct lspdb_head *head) |
77 | { | |
78 | struct isis_lsp *lsp; | |
eb5d44eb | 79 | |
4bef0ec4 DL |
80 | while ((lsp = lspdb_pop(head))) |
81 | lsp_destroy(lsp); | |
82 | lspdb_fini(head); | |
83 | } | |
f390d2c7 | 84 | |
4bef0ec4 DL |
85 | struct isis_lsp *lsp_search(struct lspdb_head *head, const uint8_t *id) |
86 | { | |
87 | struct isis_lsp searchfor; | |
88 | memcpy(searchfor.hdr.lsp_id, id, sizeof(searchfor.hdr.lsp_id)); | |
eb5d44eb | 89 | |
4bef0ec4 | 90 | return lspdb_find(head, &searchfor); |
eb5d44eb | 91 | } |
92 | ||
d62a17ae | 93 | static void lsp_clear_data(struct isis_lsp *lsp) |
eb5d44eb | 94 | { |
d62a17ae | 95 | if (!lsp) |
96 | return; | |
97 | ||
af8ac8f9 CF |
98 | isis_free_tlvs(lsp->tlvs); |
99 | lsp->tlvs = NULL; | |
eb5d44eb | 100 | } |
101 | ||
4bef0ec4 | 102 | static void lsp_remove_frags(struct lspdb_head *head, struct list *frags); |
dc84cf14 | 103 | |
d62a17ae | 104 | static void lsp_destroy(struct isis_lsp *lsp) |
eb5d44eb | 105 | { |
58e16237 | 106 | struct listnode *cnode; |
d62a17ae | 107 | struct isis_circuit *circuit; |
108 | ||
109 | if (!lsp) | |
110 | return; | |
111 | ||
58e16237 | 112 | for (ALL_LIST_ELEMENTS_RO(lsp->area->circuit_list, cnode, circuit)) |
9b39405f | 113 | isis_tx_queue_del(circuit->tx_queue, lsp); |
58e16237 | 114 | |
d62a17ae | 115 | ISIS_FLAGS_CLEAR_ALL(lsp->SSNflags); |
d62a17ae | 116 | |
d9884a75 OD |
117 | isis_te_lsp_event(lsp, LSP_DEL); |
118 | ||
d62a17ae | 119 | lsp_clear_data(lsp); |
120 | ||
dc84cf14 CF |
121 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) { |
122 | if (lsp->lspu.frags) { | |
4bef0ec4 DL |
123 | lsp_remove_frags(&lsp->area->lspdb[lsp->level - 1], |
124 | lsp->lspu.frags); | |
dc84cf14 CF |
125 | list_delete(&lsp->lspu.frags); |
126 | } | |
127 | } else { | |
128 | if (lsp->lspu.zero_lsp | |
129 | && lsp->lspu.zero_lsp->lspu.frags) { | |
130 | listnode_delete(lsp->lspu.zero_lsp->lspu.frags, lsp); | |
131 | } | |
d62a17ae | 132 | } |
133 | ||
134 | isis_spf_schedule(lsp->area, lsp->level); | |
135 | ||
136 | if (lsp->pdu) | |
137 | stream_free(lsp->pdu); | |
1eb7c3a1 CF |
138 | |
139 | fabricd_lsp_free(lsp); | |
d62a17ae | 140 | XFREE(MTYPE_ISIS_LSP, lsp); |
eb5d44eb | 141 | } |
142 | ||
eb5d44eb | 143 | /* |
144 | * Remove all the frags belonging to the given lsp | |
145 | */ | |
4bef0ec4 | 146 | static void lsp_remove_frags(struct lspdb_head *head, struct list *frags) |
eb5d44eb | 147 | { |
d62a17ae | 148 | struct listnode *lnode, *lnnode; |
149 | struct isis_lsp *lsp; | |
150 | ||
151 | for (ALL_LIST_ELEMENTS(frags, lnode, lnnode, lsp)) { | |
4bef0ec4 DL |
152 | lsp = lsp_search(head, lsp->hdr.lsp_id); |
153 | lspdb_del(head, lsp); | |
d62a17ae | 154 | lsp_destroy(lsp); |
d62a17ae | 155 | } |
eb5d44eb | 156 | } |
157 | ||
4bef0ec4 | 158 | void lsp_search_and_destroy(struct lspdb_head *head, const uint8_t *id) |
eb5d44eb | 159 | { |
d62a17ae | 160 | struct isis_lsp *lsp; |
161 | ||
4bef0ec4 DL |
162 | lsp = lsp_search(head, id); |
163 | if (lsp) { | |
164 | lspdb_del(head, lsp); | |
d62a17ae | 165 | /* |
166 | * If this is a zero lsp, remove all the frags now | |
167 | */ | |
af8ac8f9 | 168 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) == 0) { |
d62a17ae | 169 | if (lsp->lspu.frags) |
4bef0ec4 | 170 | lsp_remove_frags(head, lsp->lspu.frags); |
d62a17ae | 171 | } else { |
172 | /* | |
173 | * else just remove this frag, from the zero lsps' frag | |
174 | * list | |
175 | */ | |
176 | if (lsp->lspu.zero_lsp | |
177 | && lsp->lspu.zero_lsp->lspu.frags) | |
178 | listnode_delete(lsp->lspu.zero_lsp->lspu.frags, | |
179 | lsp); | |
180 | } | |
181 | lsp_destroy(lsp); | |
d62a17ae | 182 | } |
eb5d44eb | 183 | } |
184 | ||
185 | /* | |
186 | * Compares a LSP to given values | |
187 | * Params are given in net order | |
188 | */ | |
af8ac8f9 CF |
189 | int lsp_compare(char *areatag, struct isis_lsp *lsp, uint32_t seqno, |
190 | uint16_t checksum, uint16_t rem_lifetime) | |
eb5d44eb | 191 | { |
af8ac8f9 CF |
192 | if (lsp->hdr.seqno == seqno && lsp->hdr.checksum == checksum |
193 | && ((lsp->hdr.rem_lifetime == 0 && rem_lifetime == 0) | |
194 | || (lsp->hdr.rem_lifetime != 0 && rem_lifetime != 0))) { | |
e740f9c1 | 195 | if (IS_DEBUG_SNP_PACKETS) { |
d62a17ae | 196 | zlog_debug( |
5d39a819 OD |
197 | "ISIS-Snp (%s): Compare LSP %pLS seq 0x%08x, cksum 0x%04hx, lifetime %hus", |
198 | areatag, lsp->hdr.lsp_id, lsp->hdr.seqno, | |
199 | lsp->hdr.checksum, lsp->hdr.rem_lifetime); | |
d62a17ae | 200 | zlog_debug( |
6cde4b45 | 201 | "ISIS-Snp (%s): is equal to ours seq 0x%08x, cksum 0x%04hx, lifetime %hus", |
af8ac8f9 | 202 | areatag, seqno, checksum, rem_lifetime); |
d62a17ae | 203 | } |
204 | return LSP_EQUAL; | |
205 | } | |
206 | ||
207 | /* | |
208 | * LSPs with identical checksums should only be treated as newer if: | |
209 | * a) The current LSP has a remaining lifetime != 0 and the other LSP | |
210 | * has a | |
211 | * remaining lifetime == 0. In this case, we should participate in | |
212 | * the purge | |
213 | * and should not treat the current LSP with remaining lifetime == 0 | |
214 | * as older. | |
215 | * b) The LSP has an incorrect checksum. In this case, we need to react | |
216 | * as given | |
217 | * in 7.3.16.2. | |
218 | */ | |
af8ac8f9 CF |
219 | if (seqno > lsp->hdr.seqno |
220 | || (seqno == lsp->hdr.seqno | |
221 | && ((lsp->hdr.rem_lifetime != 0 && rem_lifetime == 0) | |
16c2ab97 CF |
222 | || (lsp->hdr.checksum != checksum |
223 | && lsp->hdr.rem_lifetime)))) { | |
e740f9c1 | 224 | if (IS_DEBUG_SNP_PACKETS) { |
d62a17ae | 225 | zlog_debug( |
5d39a819 OD |
226 | "ISIS-Snp (%s): Compare LSP %pLS seq 0x%08x, cksum 0x%04hx, lifetime %hus", |
227 | areatag, lsp->hdr.lsp_id, seqno, checksum, | |
228 | rem_lifetime); | |
d62a17ae | 229 | zlog_debug( |
6cde4b45 | 230 | "ISIS-Snp (%s): is newer than ours seq 0x%08x, cksum 0x%04hx, lifetime %hus", |
af8ac8f9 CF |
231 | areatag, lsp->hdr.seqno, lsp->hdr.checksum, |
232 | lsp->hdr.rem_lifetime); | |
d62a17ae | 233 | } |
234 | return LSP_NEWER; | |
235 | } | |
e740f9c1 | 236 | if (IS_DEBUG_SNP_PACKETS) { |
5d39a819 OD |
237 | zlog_debug( |
238 | "ISIS-Snp (%s): Compare LSP %pLS seq 0x%08x, cksum 0x%04hx, lifetime %hus", | |
239 | areatag, lsp->hdr.lsp_id, seqno, checksum, | |
240 | rem_lifetime); | |
d62a17ae | 241 | zlog_debug( |
6cde4b45 | 242 | "ISIS-Snp (%s): is older than ours seq 0x%08x, cksum 0x%04hx, lifetime %hus", |
af8ac8f9 CF |
243 | areatag, lsp->hdr.seqno, lsp->hdr.checksum, |
244 | lsp->hdr.rem_lifetime); | |
d62a17ae | 245 | } |
246 | ||
247 | return LSP_OLDER; | |
eb5d44eb | 248 | } |
249 | ||
c55018ab | 250 | static void put_lsp_hdr(struct isis_lsp *lsp, size_t *len_pointer, bool keep) |
3f045a08 | 251 | { |
af8ac8f9 CF |
252 | uint8_t pdu_type = |
253 | (lsp->level == IS_LEVEL_1) ? L1_LINK_STATE : L2_LINK_STATE; | |
254 | struct isis_lsp_hdr *hdr = &lsp->hdr; | |
255 | struct stream *stream = lsp->pdu; | |
b599ec55 | 256 | size_t orig_getp = 0, orig_endp = 0; |
c55018ab CF |
257 | |
258 | if (keep) { | |
259 | orig_getp = stream_get_getp(lsp->pdu); | |
260 | orig_endp = stream_get_endp(lsp->pdu); | |
261 | } | |
262 | ||
263 | stream_set_getp(lsp->pdu, 0); | |
264 | stream_set_endp(lsp->pdu, 0); | |
af8ac8f9 CF |
265 | |
266 | fill_fixed_hdr(pdu_type, stream); | |
267 | ||
268 | if (len_pointer) | |
269 | *len_pointer = stream_get_endp(stream); | |
270 | stream_putw(stream, hdr->pdu_len); | |
271 | stream_putw(stream, hdr->rem_lifetime); | |
272 | stream_put(stream, hdr->lsp_id, sizeof(hdr->lsp_id)); | |
273 | stream_putl(stream, hdr->seqno); | |
274 | stream_putw(stream, hdr->checksum); | |
275 | stream_putc(stream, hdr->lsp_bits); | |
c55018ab CF |
276 | |
277 | if (keep) { | |
278 | stream_set_endp(lsp->pdu, orig_endp); | |
279 | stream_set_getp(lsp->pdu, orig_getp); | |
280 | } | |
3f045a08 JB |
281 | } |
282 | ||
af8ac8f9 | 283 | static void lsp_add_auth(struct isis_lsp *lsp) |
3f045a08 | 284 | { |
d62a17ae | 285 | struct isis_passwd *passwd; |
af8ac8f9 CF |
286 | passwd = (lsp->level == IS_LEVEL_1) ? &lsp->area->area_passwd |
287 | : &lsp->area->domain_passwd; | |
288 | isis_tlvs_add_auth(lsp->tlvs, passwd); | |
289 | } | |
d62a17ae | 290 | |
af8ac8f9 CF |
291 | static void lsp_pack_pdu(struct isis_lsp *lsp) |
292 | { | |
293 | if (!lsp->tlvs) | |
294 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 295 | |
af8ac8f9 | 296 | lsp_add_auth(lsp); |
d62a17ae | 297 | |
af8ac8f9 | 298 | size_t len_pointer; |
c55018ab | 299 | put_lsp_hdr(lsp, &len_pointer, false); |
af8ac8f9 CF |
300 | isis_pack_tlvs(lsp->tlvs, lsp->pdu, len_pointer, false, true); |
301 | ||
302 | lsp->hdr.pdu_len = stream_get_endp(lsp->pdu); | |
303 | lsp->hdr.checksum = | |
304 | ntohs(fletcher_checksum(STREAM_DATA(lsp->pdu) + 12, | |
305 | stream_get_endp(lsp->pdu) - 12, 12)); | |
3f045a08 JB |
306 | } |
307 | ||
af8ac8f9 | 308 | void lsp_inc_seqno(struct isis_lsp *lsp, uint32_t seqno) |
eb5d44eb | 309 | { |
af8ac8f9 | 310 | uint32_t newseq; |
d62a17ae | 311 | |
af8ac8f9 CF |
312 | if (seqno == 0 || lsp->hdr.seqno > seqno) |
313 | newseq = lsp->hdr.seqno + 1; | |
d62a17ae | 314 | else |
af8ac8f9 | 315 | newseq = seqno + 1; |
d62a17ae | 316 | |
b21b068d EDP |
317 | #ifndef FABRICD |
318 | /* check for overflow */ | |
319 | if (newseq < lsp->hdr.seqno) { | |
320 | /* send northbound notification */ | |
1ee746d9 | 321 | lsp->area->lsp_exceeded_max_counter++; |
322 | isis_notif_lsp_exceed_max(lsp->area, lsp->hdr.lsp_id); | |
b21b068d EDP |
323 | } |
324 | #endif /* ifndef FABRICD */ | |
325 | ||
af8ac8f9 CF |
326 | lsp->hdr.seqno = newseq; |
327 | ||
328 | lsp_pack_pdu(lsp); | |
d62a17ae | 329 | isis_spf_schedule(lsp->area, lsp->level); |
d9884a75 | 330 | isis_te_lsp_event(lsp, LSP_INC); |
af8ac8f9 | 331 | } |
d62a17ae | 332 | |
2c92bee4 CF |
333 | static void lsp_purge_add_poi(struct isis_lsp *lsp, |
334 | const uint8_t *sender) | |
335 | { | |
eab88f36 K |
336 | if (lsp->area == NULL) |
337 | return; | |
338 | ||
2c92bee4 CF |
339 | if (!lsp->area->purge_originator) |
340 | return; | |
341 | ||
342 | /* add purge originator identification */ | |
343 | if (!lsp->tlvs) | |
344 | lsp->tlvs = isis_alloc_tlvs(); | |
eab88f36 K |
345 | isis_tlvs_set_purge_originator(lsp->tlvs, lsp->area->isis->sysid, |
346 | sender); | |
2c92bee4 CF |
347 | isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get()); |
348 | } | |
349 | ||
350 | static void lsp_purge(struct isis_lsp *lsp, int level, | |
351 | const uint8_t *sender) | |
af8ac8f9 CF |
352 | { |
353 | /* reset stream */ | |
354 | lsp_clear_data(lsp); | |
355 | stream_reset(lsp->pdu); | |
356 | ||
357 | /* update header */ | |
358 | lsp->hdr.checksum = 0; | |
359 | lsp->hdr.rem_lifetime = 0; | |
360 | lsp->level = level; | |
361 | lsp->age_out = lsp->area->max_lsp_lifetime[level - 1]; | |
6f004b60 | 362 | lsp->area->lsp_purge_count[level - 1]++; |
af8ac8f9 | 363 | |
2c92bee4 CF |
364 | lsp_purge_add_poi(lsp, sender); |
365 | ||
af8ac8f9 | 366 | lsp_pack_pdu(lsp); |
9b39405f | 367 | lsp_flood(lsp, NULL); |
eb5d44eb | 368 | } |
369 | ||
370 | /* | |
af8ac8f9 | 371 | * Generates checksum for LSP and its frags |
eb5d44eb | 372 | */ |
af8ac8f9 | 373 | static void lsp_seqno_update(struct isis_lsp *lsp0) |
eb5d44eb | 374 | { |
d62a17ae | 375 | struct isis_lsp *lsp; |
376 | struct listnode *node; | |
f390d2c7 | 377 | |
af8ac8f9 | 378 | lsp_inc_seqno(lsp0, 0); |
eb5d44eb | 379 | |
d62a17ae | 380 | if (!lsp0->lspu.frags) |
381 | return; | |
eb5d44eb | 382 | |
af8ac8f9 CF |
383 | for (ALL_LIST_ELEMENTS_RO(lsp0->lspu.frags, node, lsp)) { |
384 | if (lsp->tlvs) | |
385 | lsp_inc_seqno(lsp, 0); | |
8f27aa27 CF |
386 | else if (lsp->hdr.rem_lifetime) { |
387 | /* Purge should only be applied when the fragment has | |
388 | * non-zero remaining lifetime. | |
389 | */ | |
2c92bee4 | 390 | lsp_purge(lsp, lsp0->level, NULL); |
8f27aa27 | 391 | } |
af8ac8f9 | 392 | } |
f390d2c7 | 393 | |
d62a17ae | 394 | return; |
eb5d44eb | 395 | } |
396 | ||
a4777e46 | 397 | bool isis_level2_adj_up(struct isis_area *area) |
f3abc412 | 398 | { |
399 | struct listnode *node, *cnode; | |
400 | struct isis_circuit *circuit; | |
401 | struct list *adjdb; | |
402 | struct isis_adjacency *adj; | |
74ef8dd9 | 403 | |
a4777e46 IR |
404 | if (area->is_type == IS_LEVEL_1) |
405 | return false; | |
406 | ||
74ef8dd9 IR |
407 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, cnode, circuit)) { |
408 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
409 | adjdb = circuit->u.bc.adjdb[1]; | |
410 | if (!adjdb || !adjdb->count) | |
411 | continue; | |
412 | ||
413 | for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj)) { | |
77d73edf | 414 | if (adj->level != ISIS_ADJ_LEVEL1 |
f3abc412 | 415 | && adj->adj_state == ISIS_ADJ_UP) |
416 | return true; | |
417 | } | |
74ef8dd9 IR |
418 | } else if (circuit->circ_type == CIRCUIT_T_P2P |
419 | && circuit->u.p2p.neighbor) { | |
420 | adj = circuit->u.p2p.neighbor; | |
421 | if (adj->level != ISIS_ADJ_LEVEL1 | |
422 | && adj->adj_state == ISIS_ADJ_UP) | |
423 | return true; | |
f3abc412 | 424 | } |
425 | } | |
74ef8dd9 | 426 | |
f3abc412 | 427 | return false; |
428 | } | |
429 | ||
49b27ea2 IL |
430 | /* |
431 | * Unset the overload bit after the timer expires | |
432 | */ | |
e6685141 | 433 | void set_overload_on_start_timer(struct event *thread) |
49b27ea2 | 434 | { |
e16d030c | 435 | struct isis_area *area = EVENT_ARG(thread); |
49b27ea2 IL |
436 | assert(area); |
437 | ||
438 | area->t_overload_on_startup_timer = NULL; | |
4afc7836 IL |
439 | |
440 | /* Check if set-overload-bit is not currently configured */ | |
441 | if (!area->overload_configured) | |
442 | isis_area_overload_bit_set(area, false); | |
49b27ea2 IL |
443 | } |
444 | ||
74ef8dd9 | 445 | static void isis_reset_attach_bit(struct isis_adjacency *adj) |
77d73edf | 446 | { |
74ef8dd9 | 447 | struct isis_area *area = adj->circuit->area; |
77d73edf | 448 | struct lspdb_head *head; |
449 | struct isis_lsp *lsp; | |
450 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
451 | ||
74ef8dd9 IR |
452 | /* |
453 | * If an L2 adjacency changed its state in L-1-2 area, we have to: | |
454 | * - set the attached bit in L1 LSPs if it's the first L2 adjacency | |
455 | * - remove the attached bit in L1 LSPs if it's the last L2 adjacency | |
77d73edf | 456 | */ |
74ef8dd9 IR |
457 | |
458 | if (area->is_type != IS_LEVEL_1_AND_2 || adj->level == ISIS_ADJ_LEVEL1) | |
77d73edf | 459 | return; |
460 | ||
74ef8dd9 IR |
461 | if (!area->attached_bit_send) |
462 | return; | |
463 | ||
464 | head = &area->lspdb[IS_LEVEL_1 - 1]; | |
465 | memset(lspid, 0, ISIS_SYS_ID_LEN + 2); | |
466 | memcpy(lspid, area->isis->sysid, ISIS_SYS_ID_LEN); | |
467 | ||
468 | lsp = lsp_search(head, lspid); | |
469 | if (!lsp) | |
470 | return; | |
471 | ||
472 | if (adj->adj_state == ISIS_ADJ_UP | |
473 | && !(lsp->hdr.lsp_bits & LSPBIT_ATT)) { | |
474 | sched_debug("ISIS (%s): adj going up regenerate lsp-bits", | |
475 | area->area_tag); | |
476 | lsp_regenerate_schedule(area, IS_LEVEL_1, 0); | |
477 | } else if (adj->adj_state == ISIS_ADJ_DOWN | |
478 | && (lsp->hdr.lsp_bits & LSPBIT_ATT) | |
479 | && !isis_level2_adj_up(area)) { | |
480 | sched_debug("ISIS (%s): adj going down regenerate lsp-bits", | |
481 | area->area_tag); | |
482 | lsp_regenerate_schedule(area, IS_LEVEL_1, 0); | |
77d73edf | 483 | } |
484 | } | |
485 | ||
f3abc412 | 486 | static uint8_t lsp_bits_generate(int level, int overload_bit, int attached_bit, |
487 | struct isis_area *area) | |
e38e0df0 | 488 | { |
d7c0a89a | 489 | uint8_t lsp_bits = 0; |
d0f14921 | 490 | if (area->is_type == IS_LEVEL_1) |
d62a17ae | 491 | lsp_bits = IS_LEVEL_1; |
492 | else | |
493 | lsp_bits = IS_LEVEL_1_AND_2; | |
494 | if (overload_bit) | |
495 | lsp_bits |= overload_bit; | |
f3abc412 | 496 | |
497 | /* only set the attach bit if we are a level-1-2 router and this is | |
498 | * a level-1 LSP and we have a level-2 adjacency up from another area | |
499 | */ | |
500 | if (area->is_type == IS_LEVEL_1_AND_2 && level == IS_LEVEL_1 | |
501 | && attached_bit && isis_level2_adj_up(area)) | |
502 | lsp_bits |= LSPBIT_ATT; | |
d62a17ae | 503 | return lsp_bits; |
e38e0df0 SV |
504 | } |
505 | ||
af8ac8f9 CF |
506 | static void lsp_update_data(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr, |
507 | struct isis_tlvs *tlvs, struct stream *stream, | |
d62a17ae | 508 | struct isis_area *area, int level) |
eb5d44eb | 509 | { |
d62a17ae | 510 | /* free the old lsp data */ |
511 | lsp_clear_data(lsp); | |
512 | ||
513 | /* copying only the relevant part of our stream */ | |
514 | if (lsp->pdu != NULL) | |
515 | stream_free(lsp->pdu); | |
516 | lsp->pdu = stream_dup(stream); | |
517 | ||
af8ac8f9 | 518 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
d62a17ae | 519 | lsp->area = area; |
520 | lsp->level = level; | |
521 | lsp->age_out = ZERO_AGE_LIFETIME; | |
522 | lsp->installed = time(NULL); | |
d62a17ae | 523 | |
af8ac8f9 CF |
524 | lsp->tlvs = tlvs; |
525 | ||
2c92bee4 CF |
526 | if (area->dynhostname && lsp->tlvs->hostname |
527 | && lsp->hdr.rem_lifetime) { | |
240f48b3 IR |
528 | isis_dynhn_insert( |
529 | area->isis, lsp->hdr.lsp_id, lsp->tlvs->hostname, | |
530 | (lsp->hdr.lsp_bits & LSPBIT_IST) == IS_LEVEL_1_AND_2 | |
531 | ? IS_LEVEL_2 | |
532 | : IS_LEVEL_1); | |
d62a17ae | 533 | } |
534 | ||
535 | return; | |
eb5d44eb | 536 | } |
537 | ||
0b8b6cab CF |
538 | static void lsp_link_fragment(struct isis_lsp *lsp, struct isis_lsp *lsp0) |
539 | { | |
540 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) { | |
541 | /* zero lsp -> create list to store fragments */ | |
542 | lsp->lspu.frags = list_new(); | |
543 | } else { | |
544 | /* fragment -> set backpointer and add to zero lsps list */ | |
545 | assert(lsp0); | |
546 | lsp->lspu.zero_lsp = lsp0; | |
547 | listnode_add(lsp0->lspu.frags, lsp); | |
548 | } | |
549 | } | |
550 | ||
af8ac8f9 CF |
551 | void lsp_update(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr, |
552 | struct isis_tlvs *tlvs, struct stream *stream, | |
164066e4 | 553 | struct isis_area *area, int level, bool confusion) |
eb5d44eb | 554 | { |
d62a17ae | 555 | if (lsp->own_lsp) { |
af4c2728 | 556 | flog_err( |
450971aa | 557 | EC_LIB_DEVELOPMENT, |
5d39a819 OD |
558 | "ISIS-Upd (%s): BUG updating LSP %pLS still marked as own LSP", |
559 | area->area_tag, lsp->hdr.lsp_id); | |
d62a17ae | 560 | lsp_clear_data(lsp); |
561 | lsp->own_lsp = 0; | |
562 | } | |
563 | ||
164066e4 | 564 | if (confusion) { |
2c92bee4 CF |
565 | lsp_purge(lsp, level, NULL); |
566 | } else { | |
567 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); | |
164066e4 | 568 | } |
d62a17ae | 569 | |
0b8b6cab CF |
570 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) && !lsp->lspu.zero_lsp) { |
571 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
572 | struct isis_lsp *lsp0; | |
eb5d44eb | 573 | |
0b8b6cab CF |
574 | memcpy(lspid, lsp->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); |
575 | LSP_FRAGMENT(lspid) = 0; | |
4bef0ec4 | 576 | lsp0 = lsp_search(&area->lspdb[level - 1], lspid); |
0b8b6cab CF |
577 | if (lsp0) |
578 | lsp_link_fragment(lsp, lsp0); | |
8f5dbe18 | 579 | } |
0b8b6cab | 580 | |
d9884a75 | 581 | if (lsp->hdr.seqno) { |
5304211a | 582 | isis_spf_schedule(lsp->area, lsp->level); |
d9884a75 OD |
583 | isis_te_lsp_event(lsp, LSP_UPD); |
584 | } | |
8f5dbe18 CF |
585 | } |
586 | ||
eb5d44eb | 587 | /* creation of LSP directly from what we received */ |
af8ac8f9 CF |
588 | struct isis_lsp *lsp_new_from_recv(struct isis_lsp_hdr *hdr, |
589 | struct isis_tlvs *tlvs, | |
590 | struct stream *stream, struct isis_lsp *lsp0, | |
591 | struct isis_area *area, int level) | |
eb5d44eb | 592 | { |
d62a17ae | 593 | struct isis_lsp *lsp; |
594 | ||
595 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
af8ac8f9 | 596 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); |
8f5dbe18 | 597 | lsp_link_fragment(lsp, lsp0); |
d62a17ae | 598 | |
599 | return lsp; | |
eb5d44eb | 600 | } |
601 | ||
d07067ba CF |
602 | static void lsp_adjust_stream(struct isis_lsp *lsp) |
603 | { | |
604 | if (lsp->pdu) { | |
605 | if (STREAM_SIZE(lsp->pdu) == LLC_LEN + lsp->area->lsp_mtu) | |
606 | return; | |
607 | stream_free(lsp->pdu); | |
608 | } | |
609 | ||
610 | lsp->pdu = stream_new(LLC_LEN + lsp->area->lsp_mtu); | |
611 | } | |
612 | ||
d7c0a89a | 613 | struct isis_lsp *lsp_new(struct isis_area *area, uint8_t *lsp_id, |
af8ac8f9 | 614 | uint16_t rem_lifetime, uint32_t seqno, |
8f5dbe18 CF |
615 | uint8_t lsp_bits, uint16_t checksum, |
616 | struct isis_lsp *lsp0, int level) | |
eb5d44eb | 617 | { |
d62a17ae | 618 | struct isis_lsp *lsp; |
619 | ||
620 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
621 | lsp->area = area; | |
622 | ||
d07067ba | 623 | lsp_adjust_stream(lsp); |
d62a17ae | 624 | |
d62a17ae | 625 | /* Minimal LSP PDU size */ |
af8ac8f9 CF |
626 | lsp->hdr.pdu_len = ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN; |
627 | memcpy(lsp->hdr.lsp_id, lsp_id, sizeof(lsp->hdr.lsp_id)); | |
628 | lsp->hdr.checksum = checksum; | |
629 | lsp->hdr.seqno = seqno; | |
630 | lsp->hdr.rem_lifetime = rem_lifetime; | |
631 | lsp->hdr.lsp_bits = lsp_bits; | |
d62a17ae | 632 | lsp->level = level; |
633 | lsp->age_out = ZERO_AGE_LIFETIME; | |
8f5dbe18 | 634 | lsp_link_fragment(lsp, lsp0); |
c55018ab | 635 | put_lsp_hdr(lsp, NULL, false); |
d62a17ae | 636 | |
e740f9c1 | 637 | if (IS_DEBUG_EVENTS) |
5d39a819 OD |
638 | zlog_debug("New LSP with ID %pLS len %d seqnum %08x", lsp_id, |
639 | lsp->hdr.pdu_len, lsp->hdr.seqno); | |
d62a17ae | 640 | |
641 | return lsp; | |
eb5d44eb | 642 | } |
643 | ||
4bef0ec4 | 644 | void lsp_insert(struct lspdb_head *head, struct isis_lsp *lsp) |
eb5d44eb | 645 | { |
4bef0ec4 | 646 | lspdb_add(head, lsp); |
d9884a75 | 647 | if (lsp->hdr.seqno) { |
d62a17ae | 648 | isis_spf_schedule(lsp->area, lsp->level); |
d9884a75 OD |
649 | isis_te_lsp_event(lsp, LSP_ADD); |
650 | } | |
eb5d44eb | 651 | } |
652 | ||
653 | /* | |
94829496 | 654 | * Build a list of LSPs with non-zero ht and seqno bounded by start and stop ids |
eb5d44eb | 655 | */ |
4bef0ec4 DL |
656 | void lsp_build_list_nonzero_ht(struct lspdb_head *head, const uint8_t *start_id, |
657 | const uint8_t *stop_id, struct list *list) | |
eb5d44eb | 658 | { |
4bef0ec4 DL |
659 | struct isis_lsp searchfor; |
660 | struct isis_lsp *lsp, *start; | |
661 | ||
662 | memcpy(&searchfor.hdr.lsp_id, start_id, sizeof(searchfor.hdr.lsp_id)); | |
eb5d44eb | 663 | |
4bef0ec4 | 664 | start = lspdb_find_gteq(head, &searchfor); |
81fddbe7 | 665 | frr_each_from (lspdb, head, lsp, start) { |
9337256e CF |
666 | if (memcmp(lsp->hdr.lsp_id, stop_id, |
667 | ISIS_SYS_ID_LEN + 2) > 0) | |
d62a17ae | 668 | break; |
f390d2c7 | 669 | |
94829496 | 670 | if (lsp->hdr.rem_lifetime && lsp->hdr.seqno) |
9337256e CF |
671 | listnode_add(list, lsp); |
672 | } | |
eb5d44eb | 673 | } |
674 | ||
d62a17ae | 675 | static void lsp_set_time(struct isis_lsp *lsp) |
eb5d44eb | 676 | { |
d62a17ae | 677 | assert(lsp); |
f390d2c7 | 678 | |
af8ac8f9 | 679 | if (lsp->hdr.rem_lifetime == 0) { |
d62a17ae | 680 | if (lsp->age_out > 0) |
681 | lsp->age_out--; | |
682 | return; | |
683 | } | |
eb5d44eb | 684 | |
af8ac8f9 CF |
685 | lsp->hdr.rem_lifetime--; |
686 | if (lsp->pdu && stream_get_endp(lsp->pdu) >= 12) | |
687 | stream_putw_at(lsp->pdu, 10, lsp->hdr.rem_lifetime); | |
eb5d44eb | 688 | } |
689 | ||
7533cad7 QY |
690 | void lspid_print(uint8_t *lsp_id, char *dest, size_t dest_len, char dynhost, |
691 | char frag, struct isis *isis) | |
eb5d44eb | 692 | { |
d62a17ae | 693 | struct isis_dynhn *dyn = NULL; |
772270f3 | 694 | char id[SYSID_STRLEN]; |
d62a17ae | 695 | |
696 | if (dynhost) | |
240f48b3 | 697 | dyn = dynhn_find_by_id(isis, lsp_id); |
d62a17ae | 698 | else |
699 | dyn = NULL; | |
700 | ||
701 | if (dyn) | |
4ced1a2c | 702 | snprintf(id, sizeof(id), "%.14s", dyn->hostname); |
d62a17ae | 703 | else if (!memcmp(isis->sysid, lsp_id, ISIS_SYS_ID_LEN) && dynhost) |
4ced1a2c | 704 | snprintf(id, sizeof(id), "%.14s", cmd_hostname_get()); |
d62a17ae | 705 | else |
5d39a819 | 706 | snprintf(id, sizeof(id), "%pSY", lsp_id); |
eab88f36 | 707 | |
d62a17ae | 708 | if (frag) |
7533cad7 QY |
709 | snprintf(dest, dest_len, "%s.%02x-%02x", id, |
710 | LSP_PSEUDO_ID(lsp_id), LSP_FRAGMENT(lsp_id)); | |
d62a17ae | 711 | else |
7533cad7 | 712 | snprintf(dest, dest_len, "%s.%02x", id, LSP_PSEUDO_ID(lsp_id)); |
eb5d44eb | 713 | } |
714 | ||
f390d2c7 | 715 | /* Convert the lsp attribute bits to attribute string */ |
36228974 | 716 | static const char *lsp_bits2string(uint8_t lsp_bits, char *buf, size_t buf_size) |
f390d2c7 | 717 | { |
36228974 | 718 | char *pos = buf; |
eb5d44eb | 719 | |
af8ac8f9 | 720 | if (!lsp_bits) |
d62a17ae | 721 | return " none"; |
eb5d44eb | 722 | |
36228974 | 723 | if (buf_size < 2 * 3) |
724 | return " error"; | |
725 | ||
d62a17ae | 726 | /* we only focus on the default metric */ |
f3abc412 | 727 | pos += snprintf(pos, buf_size, "%d/", |
728 | ISIS_MASK_LSP_ATT_BITS(lsp_bits) ? 1 : 0); | |
eb5d44eb | 729 | |
f3abc412 | 730 | pos += snprintf(pos, buf_size, "%d/", |
731 | ISIS_MASK_LSP_PARTITION_BIT(lsp_bits) ? 1 : 0); | |
f390d2c7 | 732 | |
f3abc412 | 733 | snprintf(pos, buf_size, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits) ? 1 : 0); |
eb5d44eb | 734 | |
36228974 | 735 | return buf; |
eb5d44eb | 736 | } |
737 | ||
738 | /* this function prints the lsp on show isis database */ | |
a2cac12a JG |
739 | void lsp_print_common(struct isis_lsp *lsp, struct vty *vty, struct json_object *json, |
740 | char dynhost, struct isis *isis) | |
741 | { | |
742 | if (json) { | |
743 | return lsp_print_json(lsp, json, dynhost, isis); | |
744 | } else { | |
745 | return lsp_print_vty(lsp, vty, dynhost, isis); | |
746 | } | |
747 | } | |
748 | ||
749 | void lsp_print_json(struct isis_lsp *lsp, struct json_object *json, | |
750 | char dynhost, struct isis *isis) | |
751 | { | |
752 | char LSPid[255]; | |
753 | char age_out[8]; | |
754 | char b[200]; | |
755 | json_object *own_json; | |
756 | char buf[256]; | |
757 | ||
758 | lspid_print(lsp->hdr.lsp_id, LSPid, sizeof(LSPid), dynhost, 1, isis); | |
759 | own_json = json_object_new_object(); | |
760 | json_object_object_add(json, "lsp", own_json); | |
761 | json_object_string_add(own_json, "id", LSPid); | |
762 | json_object_string_add(own_json, "own", lsp->own_lsp ? "*" : " "); | |
763 | json_object_int_add(json, "pdu-len", lsp->hdr.pdu_len); | |
764 | snprintfrr(buf, sizeof(buf), "0x%08x", lsp->hdr.seqno); | |
765 | json_object_string_add(json, "seq-number", buf); | |
766 | snprintfrr(buf, sizeof(buf), "0x%04hx", lsp->hdr.checksum); | |
767 | json_object_string_add(json, "chksum", buf); | |
768 | if (lsp->hdr.rem_lifetime == 0) { | |
769 | snprintf(age_out, sizeof(age_out), "(%d)", lsp->age_out); | |
770 | age_out[7] = '\0'; | |
771 | json_object_string_add(json, "holdtime", age_out); | |
772 | } else { | |
773 | json_object_int_add(json, "holdtime", lsp->hdr.rem_lifetime); | |
774 | } | |
775 | json_object_string_add( | |
776 | json, "att-p-ol", lsp_bits2string(lsp->hdr.lsp_bits, b, sizeof(b))); | |
777 | } | |
778 | ||
779 | void lsp_print_vty(struct isis_lsp *lsp, struct vty *vty, | |
780 | char dynhost, struct isis *isis) | |
eb5d44eb | 781 | { |
0d6fb551 | 782 | char LSPid[255]; |
d62a17ae | 783 | char age_out[8]; |
36228974 | 784 | char b[200]; |
d62a17ae | 785 | |
7533cad7 | 786 | lspid_print(lsp->hdr.lsp_id, LSPid, sizeof(LSPid), dynhost, 1, isis); |
d62a17ae | 787 | vty_out(vty, "%-21s%c ", LSPid, lsp->own_lsp ? '*' : ' '); |
6cde4b45 DL |
788 | vty_out(vty, "%5hu ", lsp->hdr.pdu_len); |
789 | vty_out(vty, "0x%08x ", lsp->hdr.seqno); | |
790 | vty_out(vty, "0x%04hx ", lsp->hdr.checksum); | |
af8ac8f9 | 791 | if (lsp->hdr.rem_lifetime == 0) { |
772270f3 | 792 | snprintf(age_out, sizeof(age_out), "(%d)", lsp->age_out); |
d62a17ae | 793 | age_out[7] = '\0'; |
794 | vty_out(vty, "%7s ", age_out); | |
795 | } else | |
6cde4b45 | 796 | vty_out(vty, " %5hu ", lsp->hdr.rem_lifetime); |
36228974 | 797 | vty_out(vty, "%s\n", lsp_bits2string(lsp->hdr.lsp_bits, b, sizeof(b))); |
c3ae3127 CF |
798 | } |
799 | ||
a2cac12a JG |
800 | void lsp_print_detail(struct isis_lsp *lsp, struct vty *vty, |
801 | struct json_object *json, char dynhost, | |
802 | struct isis *isis) | |
eb5d44eb | 803 | { |
a2cac12a JG |
804 | if (json) { |
805 | lsp_print_json(lsp, json, dynhost, isis); | |
806 | if (lsp->tlvs) { | |
807 | isis_format_tlvs(lsp->tlvs, json); | |
808 | } | |
809 | } else { | |
810 | lsp_print_vty(lsp, vty, dynhost, isis); | |
811 | if (lsp->tlvs) | |
812 | vty_multiline(vty, " ", "%s", | |
813 | isis_format_tlvs(lsp->tlvs, NULL)); | |
814 | vty_out(vty, "\n"); | |
815 | } | |
eb5d44eb | 816 | } |
817 | ||
818 | /* print all the lsps info in the local lspdb */ | |
a2cac12a JG |
819 | int lsp_print_all(struct vty *vty, struct json_object *json, |
820 | struct lspdb_head *head, char detail, char dynhost, | |
821 | struct isis *isis) | |
eb5d44eb | 822 | { |
4bef0ec4 | 823 | struct isis_lsp *lsp; |
d62a17ae | 824 | int lsp_count = 0; |
825 | ||
826 | if (detail == ISIS_UI_LEVEL_BRIEF) { | |
81fddbe7 | 827 | frr_each (lspdb, head, lsp) { |
a2cac12a | 828 | lsp_print_common(lsp, vty, json, dynhost, isis); |
d62a17ae | 829 | lsp_count++; |
830 | } | |
831 | } else if (detail == ISIS_UI_LEVEL_DETAIL) { | |
81fddbe7 | 832 | frr_each (lspdb, head, lsp) { |
a2cac12a | 833 | lsp_print_detail(lsp, vty, json, dynhost, isis); |
d62a17ae | 834 | lsp_count++; |
835 | } | |
836 | } | |
837 | ||
838 | return lsp_count; | |
eb5d44eb | 839 | } |
840 | ||
d7c0a89a | 841 | static uint16_t lsp_rem_lifetime(struct isis_area *area, int level) |
3f045a08 | 842 | { |
d7c0a89a | 843 | uint16_t rem_lifetime; |
3f045a08 | 844 | |
d62a17ae | 845 | /* Add jitter to configured LSP lifetime */ |
846 | rem_lifetime = | |
847 | isis_jitter(area->max_lsp_lifetime[level - 1], MAX_AGE_JITTER); | |
3f045a08 | 848 | |
d62a17ae | 849 | /* No jitter if the max refresh will be less than configure gen interval |
850 | */ | |
851 | /* N.B. this calucation is acceptable since rem_lifetime is in | |
852 | * [332,65535] at | |
853 | * this point */ | |
854 | if (area->lsp_gen_interval[level - 1] > (rem_lifetime - 300)) | |
855 | rem_lifetime = area->max_lsp_lifetime[level - 1]; | |
3f045a08 | 856 | |
d62a17ae | 857 | return rem_lifetime; |
3f045a08 JB |
858 | } |
859 | ||
d7c0a89a | 860 | static uint16_t lsp_refresh_time(struct isis_lsp *lsp, uint16_t rem_lifetime) |
3f045a08 | 861 | { |
d62a17ae | 862 | struct isis_area *area = lsp->area; |
863 | int level = lsp->level; | |
d7c0a89a | 864 | uint16_t refresh_time; |
3f045a08 | 865 | |
d62a17ae | 866 | /* Add jitter to LSP refresh time */ |
867 | refresh_time = | |
868 | isis_jitter(area->lsp_refresh[level - 1], MAX_LSP_GEN_JITTER); | |
3f045a08 | 869 | |
d62a17ae | 870 | /* RFC 4444 : make sure the refresh time is at least less than 300 |
871 | * of the remaining lifetime and more than gen interval */ | |
872 | if (refresh_time <= area->lsp_gen_interval[level - 1] | |
873 | || refresh_time > (rem_lifetime - 300)) | |
874 | refresh_time = rem_lifetime - 300; | |
3f045a08 | 875 | |
d62a17ae | 876 | /* In cornercases, refresh_time might be <= lsp_gen_interval, however |
877 | * we accept this violation to satisfy refresh_time <= rem_lifetime - | |
878 | * 300 */ | |
3f045a08 | 879 | |
d62a17ae | 880 | return refresh_time; |
3f045a08 JB |
881 | } |
882 | ||
484ab405 LS |
883 | static void lsp_build_internal_reach_ipv4(struct isis_lsp *lsp, |
884 | struct isis_area *area, | |
885 | struct prefix_ipv4 *ipv4, | |
886 | uint32_t metric) | |
887 | { | |
888 | struct sr_prefix_cfg *pcfgs[SR_ALGORITHM_COUNT] = {NULL}; | |
889 | ||
890 | if (area->oldmetric) { | |
891 | lsp_debug( | |
892 | "ISIS (%s): Adding old-style IP reachability for %pFX", | |
893 | area->area_tag, ipv4); | |
894 | isis_tlvs_add_oldstyle_ip_reach(lsp->tlvs, ipv4, metric); | |
895 | } | |
896 | ||
897 | if (area->newmetric) { | |
898 | lsp_debug("ISIS (%s): Adding te-style IP reachability for %pFX", | |
899 | area->area_tag, ipv4); | |
900 | ||
901 | if (area->srdb.enabled) | |
78774bbc HS |
902 | for (int i = 0; i < SR_ALGORITHM_COUNT; i++) { |
903 | #ifndef FABRICD | |
904 | if (flex_algo_id_valid(i) && | |
905 | !isis_flex_algo_elected_supported(i, area)) | |
906 | continue; | |
907 | #endif /* ifndef FABRICD */ | |
484ab405 LS |
908 | pcfgs[i] = |
909 | isis_sr_cfg_prefix_find(area, ipv4, i); | |
78774bbc | 910 | } |
484ab405 LS |
911 | |
912 | isis_tlvs_add_extended_ip_reach(lsp->tlvs, ipv4, metric, false, | |
913 | pcfgs); | |
914 | } | |
915 | } | |
916 | ||
917 | static void lsp_build_internal_reach_ipv6(struct isis_lsp *lsp, | |
918 | struct isis_area *area, | |
919 | struct prefix_ipv6 *ipv6, | |
920 | uint32_t metric) | |
921 | { | |
922 | struct sr_prefix_cfg *pcfgs[SR_ALGORITHM_COUNT] = {NULL}; | |
923 | ||
924 | lsp_debug("ISIS (%s): Adding IPv6 reachability for %pFX", | |
925 | area->area_tag, ipv6); | |
926 | ||
927 | if (area->srdb.enabled) | |
78774bbc HS |
928 | for (int i = 0; i < SR_ALGORITHM_COUNT; i++) { |
929 | #ifndef FABRICD | |
930 | if (flex_algo_id_valid(i) && | |
931 | !isis_flex_algo_elected_supported(i, area)) | |
932 | continue; | |
933 | #endif /* ifndef FABRICD */ | |
484ab405 | 934 | pcfgs[i] = isis_sr_cfg_prefix_find(area, ipv6, i); |
78774bbc | 935 | } |
484ab405 LS |
936 | |
937 | isis_tlvs_add_ipv6_reach(lsp->tlvs, isis_area_ipv6_topology(area), ipv6, | |
938 | metric, false, pcfgs); | |
939 | } | |
940 | ||
941 | ||
d62a17ae | 942 | static void lsp_build_ext_reach_ipv4(struct isis_lsp *lsp, |
af8ac8f9 | 943 | struct isis_area *area) |
f3ccedaa | 944 | { |
af8ac8f9 | 945 | struct route_table *er_table = get_ext_reach(area, AF_INET, lsp->level); |
d62a17ae | 946 | if (!er_table) |
947 | return; | |
948 | ||
af8ac8f9 CF |
949 | for (struct route_node *rn = route_top(er_table); rn; |
950 | rn = route_next(rn)) { | |
d62a17ae | 951 | if (!rn->info) |
952 | continue; | |
953 | ||
af8ac8f9 CF |
954 | struct prefix_ipv4 *ipv4 = (struct prefix_ipv4 *)&rn->p; |
955 | struct isis_ext_info *info = rn->info; | |
f3ccedaa | 956 | |
af8ac8f9 CF |
957 | uint32_t metric = info->metric; |
958 | if (metric > MAX_WIDE_PATH_METRIC) | |
959 | metric = MAX_WIDE_PATH_METRIC; | |
960 | if (area->oldmetric && metric > 0x3f) | |
961 | metric = 0x3f; | |
d62a17ae | 962 | |
af8ac8f9 CF |
963 | if (area->oldmetric) |
964 | isis_tlvs_add_oldstyle_ip_reach(lsp->tlvs, ipv4, | |
965 | metric); | |
26f6acaf | 966 | if (area->newmetric) { |
0de7b433 HS |
967 | struct sr_prefix_cfg *pcfgs[SR_ALGORITHM_COUNT] = { |
968 | NULL}; | |
26f6acaf RW |
969 | |
970 | if (area->srdb.enabled) | |
78774bbc HS |
971 | for (int i = 0; i < SR_ALGORITHM_COUNT; i++) { |
972 | #ifndef FABRICD | |
973 | if (flex_algo_id_valid(i) && | |
974 | !isis_flex_algo_elected_supported( | |
975 | i, area)) | |
976 | continue; | |
977 | #endif /* ifndef FABRICD */ | |
0de7b433 HS |
978 | pcfgs[i] = isis_sr_cfg_prefix_find( |
979 | area, ipv4, i); | |
78774bbc | 980 | } |
26f6acaf RW |
981 | |
982 | isis_tlvs_add_extended_ip_reach(lsp->tlvs, ipv4, metric, | |
0de7b433 | 983 | true, pcfgs); |
26f6acaf | 984 | } |
af8ac8f9 | 985 | } |
c3ae3127 CF |
986 | } |
987 | ||
d62a17ae | 988 | static void lsp_build_ext_reach_ipv6(struct isis_lsp *lsp, |
af8ac8f9 | 989 | struct isis_area *area) |
f3ccedaa | 990 | { |
af8ac8f9 CF |
991 | struct route_table *er_table = |
992 | get_ext_reach(area, AF_INET6, lsp->level); | |
d62a17ae | 993 | if (!er_table) |
994 | return; | |
995 | ||
af8ac8f9 | 996 | for (struct route_node *rn = route_top(er_table); rn; |
d43d2df5 | 997 | rn = srcdest_route_next(rn)) { |
d62a17ae | 998 | if (!rn->info) |
999 | continue; | |
af8ac8f9 | 1000 | struct isis_ext_info *info = rn->info; |
d43d2df5 | 1001 | struct prefix_ipv6 *p, *src_p; |
1b3f47d0 | 1002 | |
d43d2df5 CF |
1003 | srcdest_rnode_prefixes(rn, (const struct prefix **)&p, |
1004 | (const struct prefix **)&src_p); | |
1005 | ||
af8ac8f9 | 1006 | uint32_t metric = info->metric; |
d62a17ae | 1007 | if (info->metric > MAX_WIDE_PATH_METRIC) |
af8ac8f9 | 1008 | metric = MAX_WIDE_PATH_METRIC; |
d43d2df5 CF |
1009 | |
1010 | if (!src_p || !src_p->prefixlen) { | |
0de7b433 HS |
1011 | struct sr_prefix_cfg *pcfgs[SR_ALGORITHM_COUNT] = { |
1012 | NULL}; | |
26f6acaf RW |
1013 | |
1014 | if (area->srdb.enabled) | |
78774bbc HS |
1015 | for (int i = 0; i < SR_ALGORITHM_COUNT; i++) { |
1016 | #ifndef FABRICD | |
1017 | if (flex_algo_id_valid(i) && | |
1018 | !isis_flex_algo_elected_supported( | |
1019 | i, area)) | |
1020 | continue; | |
1021 | #endif /* ifndef FABRICD */ | |
0de7b433 HS |
1022 | pcfgs[i] = isis_sr_cfg_prefix_find( |
1023 | area, p, i); | |
78774bbc | 1024 | } |
26f6acaf | 1025 | |
d43d2df5 CF |
1026 | isis_tlvs_add_ipv6_reach(lsp->tlvs, |
1027 | isis_area_ipv6_topology(area), | |
0de7b433 | 1028 | p, metric, true, pcfgs); |
d43d2df5 CF |
1029 | } else if (isis_area_ipv6_dstsrc_enabled(area)) { |
1030 | isis_tlvs_add_ipv6_dstsrc_reach(lsp->tlvs, | |
1031 | ISIS_MT_IPV6_DSTSRC, | |
1032 | p, src_p, metric); | |
1033 | } | |
d62a17ae | 1034 | } |
f3ccedaa CF |
1035 | } |
1036 | ||
af8ac8f9 | 1037 | static void lsp_build_ext_reach(struct isis_lsp *lsp, struct isis_area *area) |
f3ccedaa | 1038 | { |
af8ac8f9 CF |
1039 | lsp_build_ext_reach_ipv4(lsp, area); |
1040 | lsp_build_ext_reach_ipv6(lsp, area); | |
1041 | } | |
1042 | ||
1043 | static struct isis_lsp *lsp_next_frag(uint8_t frag_num, struct isis_lsp *lsp0, | |
1044 | struct isis_area *area, int level) | |
1045 | { | |
1046 | struct isis_lsp *lsp; | |
1047 | uint8_t frag_id[ISIS_SYS_ID_LEN + 2]; | |
1048 | ||
1049 | memcpy(frag_id, lsp0->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); | |
1050 | LSP_FRAGMENT(frag_id) = frag_num; | |
1051 | ||
4bef0ec4 | 1052 | lsp = lsp_search(&area->lspdb[level - 1], frag_id); |
af8ac8f9 CF |
1053 | if (lsp) { |
1054 | lsp_clear_data(lsp); | |
0b8b6cab CF |
1055 | if (!lsp->lspu.zero_lsp) |
1056 | lsp_link_fragment(lsp, lsp0); | |
af8ac8f9 CF |
1057 | return lsp; |
1058 | } | |
1059 | ||
1060 | lsp = lsp_new(area, frag_id, lsp0->hdr.rem_lifetime, 0, | |
1061 | lsp_bits_generate(level, area->overload_bit, | |
f3abc412 | 1062 | area->attached_bit_send, area), |
8f5dbe18 | 1063 | 0, lsp0, level); |
af8ac8f9 | 1064 | lsp->own_lsp = 1; |
4bef0ec4 | 1065 | lsp_insert(&area->lspdb[level - 1], lsp); |
af8ac8f9 | 1066 | return lsp; |
f3ccedaa CF |
1067 | } |
1068 | ||
eb5d44eb | 1069 | /* |
d62a17ae | 1070 | * Builds the LSP data part. This func creates a new frag whenever |
eb5d44eb | 1071 | * area->lsp_frag_threshold is exceeded. |
1072 | */ | |
d62a17ae | 1073 | static void lsp_build(struct isis_lsp *lsp, struct isis_area *area) |
eb5d44eb | 1074 | { |
d62a17ae | 1075 | int level = lsp->level; |
af8ac8f9 CF |
1076 | struct listnode *node; |
1077 | struct isis_lsp *frag; | |
1078 | ||
1079 | lsp_clear_data(lsp); | |
1080 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) | |
1081 | lsp_clear_data(frag); | |
d62a17ae | 1082 | |
af8ac8f9 | 1083 | lsp->tlvs = isis_alloc_tlvs(); |
d62a17ae | 1084 | lsp_debug("ISIS (%s): Constructing local system LSP for level %d", |
1085 | area->area_tag, level); | |
1086 | ||
af8ac8f9 | 1087 | lsp->hdr.lsp_bits = lsp_bits_generate(level, area->overload_bit, |
f3abc412 | 1088 | area->attached_bit_send, area); |
d62a17ae | 1089 | |
af8ac8f9 | 1090 | lsp_add_auth(lsp); |
d62a17ae | 1091 | |
af8ac8f9 | 1092 | isis_tlvs_add_area_addresses(lsp->tlvs, area->area_addrs); |
d62a17ae | 1093 | |
1094 | /* Protocols Supported */ | |
1095 | if (area->ip_circuits > 0 || area->ipv6_circuits > 0) { | |
af8ac8f9 | 1096 | struct nlpids nlpids = {.count = 0}; |
1b3f47d0 | 1097 | |
d62a17ae | 1098 | if (area->ip_circuits > 0) { |
1099 | lsp_debug( | |
1100 | "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs", | |
1101 | area->area_tag); | |
af8ac8f9 CF |
1102 | nlpids.nlpids[nlpids.count] = NLPID_IP; |
1103 | nlpids.count++; | |
d62a17ae | 1104 | } |
1105 | if (area->ipv6_circuits > 0) { | |
1106 | lsp_debug( | |
1107 | "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs", | |
1108 | area->area_tag); | |
af8ac8f9 CF |
1109 | nlpids.nlpids[nlpids.count] = NLPID_IPV6; |
1110 | nlpids.count++; | |
d62a17ae | 1111 | } |
af8ac8f9 | 1112 | isis_tlvs_set_protocols_supported(lsp->tlvs, &nlpids); |
d62a17ae | 1113 | } |
1114 | ||
1115 | if (area_is_mt(area)) { | |
1116 | lsp_debug("ISIS (%s): Adding MT router tlv...", area->area_tag); | |
d62a17ae | 1117 | |
1118 | struct isis_area_mt_setting **mt_settings; | |
1119 | unsigned int mt_count; | |
1120 | ||
1121 | mt_settings = area_mt_settings(area, &mt_count); | |
1122 | for (unsigned int i = 0; i < mt_count; i++) { | |
af8ac8f9 CF |
1123 | isis_tlvs_add_mt_router_info( |
1124 | lsp->tlvs, mt_settings[i]->mtid, | |
1125 | mt_settings[i]->overload, false); | |
d62a17ae | 1126 | lsp_debug("ISIS (%s): MT %s", area->area_tag, |
af8ac8f9 | 1127 | isis_mtid2str(mt_settings[i]->mtid)); |
aa4376ec | 1128 | } |
d62a17ae | 1129 | } else { |
1130 | lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)", | |
1131 | area->area_tag); | |
1132 | } | |
1133 | /* Dynamic Hostname */ | |
1134 | if (area->dynhostname) { | |
6b3ee3a0 | 1135 | isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get()); |
af8ac8f9 | 1136 | lsp_debug("ISIS (%s): Adding dynamic hostname '%s'", |
6b3ee3a0 | 1137 | area->area_tag, cmd_hostname_get()); |
d62a17ae | 1138 | } else { |
1139 | lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)", | |
1140 | area->area_tag); | |
1141 | } | |
1142 | ||
26f6acaf | 1143 | /* Add Router Capability TLV. */ |
eab88f36 | 1144 | if (area->isis->router_id != 0) { |
78774bbc HS |
1145 | struct isis_router_cap *rcap; |
1146 | #ifndef FABRICD | |
1147 | struct isis_router_cap_fad *rcap_fad; | |
1148 | struct listnode *node; | |
1149 | struct flex_algo *fa; | |
1150 | #endif /* ifndef FABRICD */ | |
1151 | ||
1152 | rcap = isis_tlvs_init_router_capability(lsp->tlvs); | |
26f6acaf | 1153 | |
78774bbc | 1154 | rcap->router_id.s_addr = area->isis->router_id; |
e7948f8c | 1155 | |
78774bbc HS |
1156 | #ifndef FABRICD |
1157 | /* Set flex-algo definitions */ | |
1158 | for (ALL_LIST_ELEMENTS_RO(area->flex_algos->flex_algos, node, | |
1159 | fa)) { | |
1160 | if (!fa->advertise_definition) | |
1161 | continue; | |
1162 | lsp_debug("ISIS (%s): Flex-Algo Definition %u", | |
1163 | area->area_tag, fa->algorithm); | |
1164 | isis_tlvs_set_router_capability_fad(lsp->tlvs, fa, | |
1165 | fa->algorithm, | |
1166 | area->isis->sysid); | |
1167 | } | |
1168 | #endif /* ifndef FABRICD */ | |
26f6acaf RW |
1169 | |
1170 | /* Add SR Sub-TLVs if SR is enabled. */ | |
1171 | if (area->srdb.enabled) { | |
1172 | struct isis_sr_db *srdb = &area->srdb; | |
1173 | uint32_t range_size; | |
1174 | ||
d8391312 | 1175 | /* SRGB first */ |
26f6acaf RW |
1176 | range_size = srdb->config.srgb_upper_bound |
1177 | - srdb->config.srgb_lower_bound + 1; | |
78774bbc HS |
1178 | rcap->srgb.flags = ISIS_SUBTLV_SRGB_FLAG_I | |
1179 | ISIS_SUBTLV_SRGB_FLAG_V; | |
1180 | rcap->srgb.range_size = range_size; | |
1181 | rcap->srgb.lower_bound = srdb->config.srgb_lower_bound; | |
d8391312 | 1182 | /* Then Algorithm */ |
78774bbc HS |
1183 | rcap->algo[0] = SR_ALGORITHM_SPF; |
1184 | rcap->algo[1] = SR_ALGORITHM_UNSET; | |
1185 | #ifndef FABRICD | |
1186 | for (ALL_LIST_ELEMENTS_RO(area->flex_algos->flex_algos, | |
1187 | node, fa)) { | |
1188 | if (fa->advertise_definition) | |
1189 | rcap_fad = rcap->fads[fa->algorithm]; | |
1190 | else | |
1191 | rcap_fad = NULL; | |
1192 | ||
1193 | if (!isis_flex_algo_elected_supported_local_fad( | |
3f55b8c6 LS |
1194 | fa->algorithm, area, &rcap_fad)) { |
1195 | fa->state = false; | |
78774bbc | 1196 | continue; |
3f55b8c6 LS |
1197 | } |
1198 | fa->state = true; | |
78774bbc HS |
1199 | lsp_debug("ISIS (%s): SR Algorithm %u", |
1200 | area->area_tag, fa->algorithm); | |
1201 | rcap->algo[fa->algorithm] = fa->algorithm; | |
1202 | } | |
1203 | #endif /* ifndef FABRICD */ | |
d8391312 | 1204 | /* SRLB */ |
78774bbc | 1205 | rcap->srlb.flags = 0; |
d8391312 OD |
1206 | range_size = srdb->config.srlb_upper_bound |
1207 | - srdb->config.srlb_lower_bound + 1; | |
78774bbc HS |
1208 | rcap->srlb.range_size = range_size; |
1209 | rcap->srlb.lower_bound = srdb->config.srlb_lower_bound; | |
d8391312 | 1210 | /* And finally MSD */ |
78774bbc | 1211 | rcap->msd = srdb->config.msd; |
26f6acaf | 1212 | } |
26f6acaf RW |
1213 | } |
1214 | ||
1b3f47d0 OD |
1215 | /* IPv4 address and TE router ID TLVs. |
1216 | * In case of the first one we don't follow "C" vendor, | |
1217 | * but "J" vendor behavior - one IPv4 address is put | |
1218 | * into LSP. TE router ID will be the same if MPLS-TE | |
1219 | * is not activate or MPLS-TE router-id not specified | |
1220 | */ | |
eab88f36 K |
1221 | if (area->isis->router_id != 0) { |
1222 | struct in_addr id = {.s_addr = area->isis->router_id}; | |
2dbe669b DA |
1223 | lsp_debug("ISIS (%s): Adding router ID %pI4 as IPv4 tlv.", |
1224 | area->area_tag, &id); | |
af8ac8f9 | 1225 | isis_tlvs_add_ipv4_address(lsp->tlvs, &id); |
d62a17ae | 1226 | |
1b3f47d0 OD |
1227 | /* If new style TLV's are in use, add TE router ID TLV |
1228 | * Check if MPLS-TE is activate and mpls-te router-id set | |
1229 | * otherwise add exactly same data as for IPv4 address | |
1230 | */ | |
d62a17ae | 1231 | if (area->newmetric) { |
1b3f47d0 | 1232 | if (IS_MPLS_TE(area->mta) |
3a6290bd | 1233 | && area->mta->router_id.s_addr != INADDR_ANY) |
1b3f47d0 | 1234 | id.s_addr = area->mta->router_id.s_addr; |
d62a17ae | 1235 | lsp_debug( |
1236 | "ISIS (%s): Adding router ID also as TE router ID tlv.", | |
1237 | area->area_tag); | |
af8ac8f9 | 1238 | isis_tlvs_set_te_router_id(lsp->tlvs, &id); |
aa4376ec | 1239 | } |
d62a17ae | 1240 | } else { |
1241 | lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.", | |
1242 | area->area_tag); | |
1243 | } | |
1244 | ||
173f8887 OD |
1245 | if (IS_MPLS_TE(area->mta) |
1246 | && !IN6_IS_ADDR_UNSPECIFIED(&area->mta->router_id_ipv6)) { | |
1247 | lsp_debug("ISIS (%s): Adding IPv6 TE Router ID tlv.", | |
1248 | area->area_tag); | |
1249 | isis_tlvs_set_te_router_id_ipv6(lsp->tlvs, | |
1250 | &area->mta->router_id_ipv6); | |
1251 | } | |
1252 | ||
d62a17ae | 1253 | lsp_debug("ISIS (%s): Adding circuit specific information.", |
1254 | area->area_tag); | |
1255 | ||
92ed0cde CF |
1256 | if (fabricd) { |
1257 | lsp_debug( | |
6cde4b45 | 1258 | "ISIS (%s): Adding tier %hhu spine-leaf-extension tlv.", |
92ed0cde CF |
1259 | area->area_tag, fabricd_tier(area)); |
1260 | isis_tlvs_add_spine_leaf(lsp->tlvs, fabricd_tier(area), true, | |
1261 | false, false, false); | |
1262 | } | |
1263 | ||
af8ac8f9 | 1264 | struct isis_circuit *circuit; |
d62a17ae | 1265 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit)) { |
1266 | if (!circuit->interface) | |
1267 | lsp_debug( | |
1268 | "ISIS (%s): Processing %s circuit %p with unknown interface", | |
1269 | area->area_tag, | |
1270 | circuit_type2string(circuit->circ_type), | |
1271 | circuit); | |
1272 | else | |
1273 | lsp_debug("ISIS (%s): Processing %s circuit %s", | |
1274 | area->area_tag, | |
1275 | circuit_type2string(circuit->circ_type), | |
1276 | circuit->interface->name); | |
1277 | ||
1278 | if (circuit->state != C_STATE_UP) { | |
1279 | lsp_debug("ISIS (%s): Circuit is not up, ignoring.", | |
1280 | area->area_tag); | |
1281 | continue; | |
aa4376ec | 1282 | } |
d62a17ae | 1283 | |
3f3608d8 DO |
1284 | if (area->advertise_passive_only && !circuit->is_passive) { |
1285 | lsp_debug( | |
1286 | "ISIS (%s): Circuit is not passive, ignoring.", | |
1287 | area->area_tag); | |
1288 | continue; | |
1289 | } | |
1290 | ||
af8ac8f9 CF |
1291 | uint32_t metric = area->oldmetric |
1292 | ? circuit->metric[level - 1] | |
1293 | : circuit->te_metric[level - 1]; | |
1294 | ||
91a5bbc4 | 1295 | if (circuit->ip_router && circuit->ip_addrs->count > 0) { |
d62a17ae | 1296 | lsp_debug( |
1297 | "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.", | |
1298 | area->area_tag); | |
af8ac8f9 CF |
1299 | struct listnode *ipnode; |
1300 | struct prefix_ipv4 *ipv4; | |
1301 | for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, ipnode, | |
484ab405 LS |
1302 | ipv4)) |
1303 | lsp_build_internal_reach_ipv4(lsp, area, ipv4, | |
1304 | metric); | |
f390d2c7 | 1305 | } |
d62a17ae | 1306 | |
91a5bbc4 | 1307 | if (circuit->ipv6_router && circuit->ipv6_non_link->count > 0) { |
af8ac8f9 CF |
1308 | struct listnode *ipnode; |
1309 | struct prefix_ipv6 *ipv6; | |
1b3f47d0 | 1310 | |
d62a17ae | 1311 | for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, |
484ab405 LS |
1312 | ipnode, ipv6)) |
1313 | lsp_build_internal_reach_ipv6(lsp, area, ipv6, | |
1314 | metric); | |
aa4376ec | 1315 | } |
d62a17ae | 1316 | |
1317 | switch (circuit->circ_type) { | |
1318 | case CIRCUIT_T_BROADCAST: | |
1319 | if (level & circuit->is_type) { | |
af8ac8f9 CF |
1320 | uint8_t *ne_id = |
1321 | (level == IS_LEVEL_1) | |
1322 | ? circuit->u.bc.l1_desig_is | |
1323 | : circuit->u.bc.l2_desig_is; | |
1324 | ||
1325 | if (LSP_PSEUDO_ID(ne_id)) { | |
1326 | if (area->oldmetric) { | |
d62a17ae | 1327 | lsp_debug( |
5d39a819 OD |
1328 | "ISIS (%s): Adding DIS %pPN as old-style neighbor", |
1329 | area->area_tag, ne_id); | |
af8ac8f9 CF |
1330 | isis_tlvs_add_oldstyle_reach( |
1331 | lsp->tlvs, ne_id, | |
1332 | metric); | |
d62a17ae | 1333 | } |
1b3f47d0 | 1334 | if (area->newmetric) |
d62a17ae | 1335 | tlvs_add_mt_bcast( |
af8ac8f9 | 1336 | lsp->tlvs, circuit, |
1b3f47d0 | 1337 | level, ne_id, metric); |
d62a17ae | 1338 | } |
1339 | } else { | |
1340 | lsp_debug( | |
1341 | "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors", | |
1342 | area->area_tag); | |
1343 | } | |
1344 | break; | |
af8ac8f9 CF |
1345 | case CIRCUIT_T_P2P: { |
1346 | struct isis_adjacency *nei = circuit->u.p2p.neighbor; | |
44b89511 CF |
1347 | if (nei && nei->adj_state == ISIS_ADJ_UP |
1348 | && (level & nei->circuit_t)) { | |
af8ac8f9 CF |
1349 | uint8_t ne_id[7]; |
1350 | memcpy(ne_id, nei->sysid, ISIS_SYS_ID_LEN); | |
1351 | LSP_PSEUDO_ID(ne_id) = 0; | |
1352 | ||
d62a17ae | 1353 | if (area->oldmetric) { |
d62a17ae | 1354 | lsp_debug( |
5d39a819 OD |
1355 | "ISIS (%s): Adding old-style is reach for %pSY", |
1356 | area->area_tag, ne_id); | |
af8ac8f9 CF |
1357 | isis_tlvs_add_oldstyle_reach( |
1358 | lsp->tlvs, ne_id, metric); | |
d62a17ae | 1359 | } |
1360 | if (area->newmetric) { | |
a191178d CF |
1361 | uint32_t neighbor_metric; |
1362 | if (fabricd_tier(area) == 0) { | |
1363 | neighbor_metric = 0xffe; | |
1364 | } else { | |
1365 | neighbor_metric = metric; | |
1366 | } | |
1367 | ||
af8ac8f9 | 1368 | tlvs_add_mt_p2p(lsp->tlvs, circuit, |
1b3f47d0 | 1369 | ne_id, neighbor_metric); |
d62a17ae | 1370 | } |
1371 | } else { | |
1372 | lsp_debug( | |
1373 | "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors", | |
1374 | area->area_tag); | |
1375 | } | |
af8ac8f9 | 1376 | } break; |
d62a17ae | 1377 | case CIRCUIT_T_LOOPBACK: |
1378 | break; | |
1379 | default: | |
1380 | zlog_warn("lsp_area_create: unknown circuit type"); | |
aa4376ec | 1381 | } |
d62a17ae | 1382 | } |
1383 | ||
af8ac8f9 | 1384 | lsp_build_ext_reach(lsp, area); |
d62a17ae | 1385 | |
af8ac8f9 CF |
1386 | struct isis_tlvs *tlvs = lsp->tlvs; |
1387 | lsp->tlvs = NULL; | |
d62a17ae | 1388 | |
d07067ba | 1389 | lsp_adjust_stream(lsp); |
af8ac8f9 CF |
1390 | lsp_pack_pdu(lsp); |
1391 | size_t tlv_space = STREAM_WRITEABLE(lsp->pdu) - LLC_LEN; | |
1392 | lsp_clear_data(lsp); | |
d62a17ae | 1393 | |
af8ac8f9 CF |
1394 | struct list *fragments = isis_fragment_tlvs(tlvs, tlv_space); |
1395 | if (!fragments) { | |
1396 | zlog_warn("BUG: could not fragment own LSP:"); | |
996c9314 | 1397 | log_multiline(LOG_WARNING, " ", "%s", |
a2cac12a | 1398 | isis_format_tlvs(tlvs, NULL)); |
af8ac8f9 CF |
1399 | isis_free_tlvs(tlvs); |
1400 | return; | |
d62a17ae | 1401 | } |
af8ac8f9 | 1402 | isis_free_tlvs(tlvs); |
d62a17ae | 1403 | |
789c4dfc | 1404 | bool fragment_overflow = false; |
af8ac8f9 CF |
1405 | frag = lsp; |
1406 | for (ALL_LIST_ELEMENTS_RO(fragments, node, tlvs)) { | |
1407 | if (node != listhead(fragments)) { | |
789c4dfc CF |
1408 | if (LSP_FRAGMENT(frag->hdr.lsp_id) == 255) { |
1409 | if (!fragment_overflow) { | |
1410 | fragment_overflow = true; | |
996c9314 LB |
1411 | zlog_warn( |
1412 | "ISIS (%s): Too much information for 256 fragments", | |
1413 | area->area_tag); | |
789c4dfc CF |
1414 | } |
1415 | isis_free_tlvs(tlvs); | |
1416 | continue; | |
1417 | } | |
1418 | ||
af8ac8f9 CF |
1419 | frag = lsp_next_frag(LSP_FRAGMENT(frag->hdr.lsp_id) + 1, |
1420 | lsp, area, level); | |
d07067ba | 1421 | lsp_adjust_stream(frag); |
d62a17ae | 1422 | } |
af8ac8f9 | 1423 | frag->tlvs = tlvs; |
d62a17ae | 1424 | } |
1425 | ||
6a154c88 | 1426 | list_delete(&fragments); |
af8ac8f9 CF |
1427 | lsp_debug("ISIS (%s): LSP construction is complete. Serializing...", |
1428 | area->area_tag); | |
d62a17ae | 1429 | return; |
eb5d44eb | 1430 | } |
eb5d44eb | 1431 | |
1432 | /* | |
3f045a08 | 1433 | * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs |
eb5d44eb | 1434 | */ |
d62a17ae | 1435 | int lsp_generate(struct isis_area *area, int level) |
f390d2c7 | 1436 | { |
d62a17ae | 1437 | struct isis_lsp *oldlsp, *newlsp; |
d7c0a89a QY |
1438 | uint32_t seq_num = 0; |
1439 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1440 | uint16_t rem_lifetime, refresh_time; | |
450841fe | 1441 | uint32_t overload_time; |
d62a17ae | 1442 | |
1443 | if ((area == NULL) || (area->is_type & level) != level) | |
1444 | return ISIS_ERROR; | |
1445 | ||
3b0e97e1 | 1446 | /* Check if config is still being processed */ |
5f6eaa9b | 1447 | if (event_is_scheduled(t_isis_cfg)) |
3b0e97e1 IL |
1448 | return ISIS_OK; |
1449 | ||
d62a17ae | 1450 | memset(&lspid, 0, ISIS_SYS_ID_LEN + 2); |
eab88f36 K |
1451 | |
1452 | memcpy(&lspid, area->isis->sysid, ISIS_SYS_ID_LEN); | |
d62a17ae | 1453 | |
450841fe IL |
1454 | /* Check if device should be overloaded on startup */ |
1455 | if (device_startup) { | |
1456 | overload_time = isis_restart_read_overload_time(area); | |
1457 | if (overload_time > 0) { | |
1458 | isis_area_overload_bit_set(area, true); | |
907a2395 DS |
1459 | event_add_timer(master, set_overload_on_start_timer, |
1460 | area, overload_time, | |
1461 | &area->t_overload_on_startup_timer); | |
450841fe IL |
1462 | } |
1463 | device_startup = false; | |
1464 | } | |
1465 | ||
d62a17ae | 1466 | /* only builds the lsp if the area shares the level */ |
4bef0ec4 | 1467 | oldlsp = lsp_search(&area->lspdb[level - 1], lspid); |
d62a17ae | 1468 | if (oldlsp) { |
1469 | /* FIXME: we should actually initiate a purge */ | |
af8ac8f9 | 1470 | seq_num = oldlsp->hdr.seqno; |
4bef0ec4 DL |
1471 | lsp_search_and_destroy(&area->lspdb[level - 1], |
1472 | oldlsp->hdr.lsp_id); | |
d62a17ae | 1473 | } |
1474 | rem_lifetime = lsp_rem_lifetime(area, level); | |
f3abc412 | 1475 | newlsp = lsp_new(area, lspid, rem_lifetime, seq_num, |
1476 | lsp_bits_generate(area->is_type, area->overload_bit, | |
1477 | area->attached_bit_send, area), | |
1478 | 0, NULL, level); | |
d62a17ae | 1479 | newlsp->area = area; |
1480 | newlsp->own_lsp = 1; | |
1481 | ||
4bef0ec4 | 1482 | lsp_insert(&area->lspdb[level - 1], newlsp); |
d62a17ae | 1483 | /* build_lsp_data (newlsp, area); */ |
1484 | lsp_build(newlsp, area); | |
1485 | /* time to calculate our checksum */ | |
af8ac8f9 | 1486 | lsp_seqno_update(newlsp); |
d62a17ae | 1487 | newlsp->last_generated = time(NULL); |
9b39405f | 1488 | lsp_flood(newlsp, NULL); |
062f4d36 | 1489 | area->lsp_gen_count[level - 1]++; |
d62a17ae | 1490 | |
1491 | refresh_time = lsp_refresh_time(newlsp, rem_lifetime); | |
1492 | ||
e16d030c | 1493 | EVENT_OFF(area->t_lsp_refresh[level - 1]); |
d62a17ae | 1494 | area->lsp_regenerate_pending[level - 1] = 0; |
907a2395 DS |
1495 | event_add_timer(master, lsp_refresh, &area->lsp_refresh_arg[level - 1], |
1496 | refresh_time, &area->t_lsp_refresh[level - 1]); | |
d62a17ae | 1497 | |
e740f9c1 | 1498 | if (IS_DEBUG_UPDATE_PACKETS) { |
5d39a819 OD |
1499 | zlog_debug( |
1500 | "ISIS-Upd (%s): Building L%d LSP %pLS, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus refresh %hus", | |
1501 | area->area_tag, level, newlsp->hdr.lsp_id, | |
1502 | newlsp->hdr.pdu_len, newlsp->hdr.seqno, | |
1503 | newlsp->hdr.checksum, newlsp->hdr.rem_lifetime, | |
1504 | refresh_time); | |
d62a17ae | 1505 | } |
1506 | sched_debug( | |
1507 | "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.", | |
1508 | area->area_tag, level); | |
1509 | ||
998011fa EDP |
1510 | #ifndef FABRICD |
1511 | /* send northbound notification */ | |
1ee746d9 | 1512 | isis_notif_lsp_gen(area, newlsp->hdr.lsp_id, newlsp->hdr.seqno, |
1513 | newlsp->last_generated); | |
998011fa EDP |
1514 | #endif /* ifndef FABRICD */ |
1515 | ||
d62a17ae | 1516 | return ISIS_OK; |
eb5d44eb | 1517 | } |
1518 | ||
1519 | /* | |
9b39405f | 1520 | * Search own LSPs, update holding time and flood |
eb5d44eb | 1521 | */ |
d62a17ae | 1522 | static int lsp_regenerate(struct isis_area *area, int level) |
eb5d44eb | 1523 | { |
4bef0ec4 | 1524 | struct lspdb_head *head; |
d62a17ae | 1525 | struct isis_lsp *lsp, *frag; |
1526 | struct listnode *node; | |
d7c0a89a QY |
1527 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; |
1528 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1529 | |
1530 | if ((area == NULL) || (area->is_type & level) != level) | |
1531 | return ISIS_ERROR; | |
1532 | ||
4bef0ec4 | 1533 | head = &area->lspdb[level - 1]; |
d62a17ae | 1534 | memset(lspid, 0, ISIS_SYS_ID_LEN + 2); |
eab88f36 | 1535 | memcpy(lspid, area->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1536 | |
4bef0ec4 | 1537 | lsp = lsp_search(head, lspid); |
d62a17ae | 1538 | |
1539 | if (!lsp) { | |
450971aa | 1540 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 QY |
1541 | "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!", |
1542 | area->area_tag, level); | |
d62a17ae | 1543 | return ISIS_ERROR; |
1544 | } | |
1545 | ||
1546 | lsp_clear_data(lsp); | |
1547 | lsp_build(lsp, area); | |
d62a17ae | 1548 | rem_lifetime = lsp_rem_lifetime(area, level); |
af8ac8f9 | 1549 | lsp->hdr.rem_lifetime = rem_lifetime; |
d62a17ae | 1550 | lsp->last_generated = time(NULL); |
9b39405f | 1551 | lsp_flood(lsp, NULL); |
062f4d36 | 1552 | area->lsp_gen_count[level - 1]++; |
d62a17ae | 1553 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { |
8f27aa27 CF |
1554 | if (!frag->tlvs) { |
1555 | /* Updating and flooding should only affect fragments | |
1556 | * carrying data | |
1557 | */ | |
1558 | continue; | |
1559 | } | |
1560 | ||
f3abc412 | 1561 | frag->hdr.lsp_bits = |
1562 | lsp_bits_generate(level, area->overload_bit, | |
1563 | area->attached_bit_send, area); | |
d62a17ae | 1564 | /* Set the lifetime values of all the fragments to the same |
1565 | * value, | |
1566 | * so that no fragment expires before the lsp is refreshed. | |
1567 | */ | |
af8ac8f9 | 1568 | frag->hdr.rem_lifetime = rem_lifetime; |
0b8b6cab | 1569 | frag->age_out = ZERO_AGE_LIFETIME; |
9b39405f | 1570 | lsp_flood(frag, NULL); |
d62a17ae | 1571 | } |
af8ac8f9 | 1572 | lsp_seqno_update(lsp); |
d62a17ae | 1573 | |
1574 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
907a2395 DS |
1575 | event_add_timer(master, lsp_refresh, &area->lsp_refresh_arg[level - 1], |
1576 | refresh_time, &area->t_lsp_refresh[level - 1]); | |
d62a17ae | 1577 | area->lsp_regenerate_pending[level - 1] = 0; |
1578 | ||
e740f9c1 | 1579 | if (IS_DEBUG_UPDATE_PACKETS) { |
d62a17ae | 1580 | zlog_debug( |
5d39a819 OD |
1581 | "ISIS-Upd (%s): Refreshed our L%d LSP %pLS, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus refresh %hus", |
1582 | area->area_tag, level, lsp->hdr.lsp_id, | |
af8ac8f9 CF |
1583 | lsp->hdr.pdu_len, lsp->hdr.seqno, lsp->hdr.checksum, |
1584 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1585 | } |
1586 | sched_debug( | |
1587 | "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.", | |
1588 | area->area_tag, level); | |
1589 | ||
1590 | return ISIS_OK; | |
eb5d44eb | 1591 | } |
1592 | ||
eb5d44eb | 1593 | /* |
3f045a08 | 1594 | * Something has changed or periodic refresh -> regenerate LSP |
eb5d44eb | 1595 | */ |
e6685141 | 1596 | static void lsp_refresh(struct event *thread) |
eb5d44eb | 1597 | { |
e16d030c | 1598 | struct lsp_refresh_arg *arg = EVENT_ARG(thread); |
d70f99e1 | 1599 | |
9196731f | 1600 | assert(arg); |
eb5d44eb | 1601 | |
9196731f | 1602 | struct isis_area *area = arg->area; |
eb5d44eb | 1603 | |
d62a17ae | 1604 | assert(area); |
f390d2c7 | 1605 | |
9196731f | 1606 | int level = arg->level; |
f390d2c7 | 1607 | |
9196731f CF |
1608 | area->t_lsp_refresh[level - 1] = NULL; |
1609 | area->lsp_regenerate_pending[level - 1] = 0; | |
1610 | ||
1611 | if ((area->is_type & level) == 0) | |
cc9f21da | 1612 | return; |
3f045a08 | 1613 | |
690497fb G |
1614 | /* |
1615 | * Throttle regeneration of LSPs (but not when BFD signalled a 'down' | |
1616 | * message) | |
1617 | */ | |
1618 | if (monotime_since(&area->last_lsp_refresh_event[level - 1], NULL) | |
1619 | < 100000L | |
1620 | && !(area->bfd_force_spf_refresh)) { | |
f93025e1 CF |
1621 | sched_debug("ISIS (%s): Still unstable, postpone LSP L%d refresh", |
1622 | area->area_tag, level); | |
1623 | _lsp_regenerate_schedule(area, level, 0, false, | |
1624 | __func__, __FILE__, __LINE__); | |
cc9f21da | 1625 | return; |
f93025e1 CF |
1626 | } |
1627 | ||
d62a17ae | 1628 | sched_debug( |
9196731f CF |
1629 | "ISIS (%s): LSP L%d refresh timer expired. Refreshing LSP...", |
1630 | area->area_tag, level); | |
cc9f21da | 1631 | lsp_regenerate(area, level); |
eb5d44eb | 1632 | } |
1633 | ||
691f3e76 | 1634 | int _lsp_regenerate_schedule(struct isis_area *area, int level, |
f93025e1 CF |
1635 | int all_pseudo, bool postpone, |
1636 | const char *func, const char *file, | |
1637 | int line) | |
eb5d44eb | 1638 | { |
d62a17ae | 1639 | struct isis_lsp *lsp; |
d7c0a89a | 1640 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1641 | time_t now, diff; |
1642 | long timeout; | |
1643 | struct listnode *cnode; | |
1644 | struct isis_circuit *circuit; | |
1645 | int lvl; | |
1646 | ||
1647 | if (area == NULL) | |
1648 | return ISIS_ERROR; | |
1649 | ||
1650 | sched_debug( | |
3efd0893 | 1651 | "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs Caller: %s %s:%d", |
d62a17ae | 1652 | area->area_tag, circuit_t2string(level), |
691f3e76 CF |
1653 | all_pseudo ? "" : "not ", |
1654 | func, file, line); | |
d62a17ae | 1655 | |
eab88f36 | 1656 | memcpy(id, area->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1657 | LSP_PSEUDO_ID(id) = LSP_FRAGMENT(id) = 0; |
1658 | now = time(NULL); | |
1659 | ||
1660 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1661 | if (!((level & lvl) && (area->is_type & lvl))) | |
1662 | continue; | |
1663 | ||
f93025e1 CF |
1664 | if (postpone) { |
1665 | monotime(&area->last_lsp_refresh_event[lvl - 1]); | |
1666 | } | |
1667 | ||
d62a17ae | 1668 | sched_debug( |
1669 | "ISIS (%s): Checking whether L%d needs to be scheduled", | |
1670 | area->area_tag, lvl); | |
1671 | ||
690497fb G |
1672 | if (area->lsp_regenerate_pending[lvl - 1] |
1673 | && !(area->bfd_signalled_down)) { | |
1674 | /* | |
1675 | * Note: in case of a BFD 'down' message the refresh is | |
1676 | * scheduled once again just to be sure | |
1677 | */ | |
4f830a07 | 1678 | struct timeval remain = event_timer_remain( |
d62a17ae | 1679 | area->t_lsp_refresh[lvl - 1]); |
1680 | sched_debug( | |
3efd0893 | 1681 | "ISIS (%s): Regeneration is already pending, nothing todo. (Due in %lld.%03lld seconds)", |
d62a17ae | 1682 | area->area_tag, (long long)remain.tv_sec, |
1683 | (long long)remain.tv_usec / 1000); | |
1684 | continue; | |
1685 | } | |
1686 | ||
4bef0ec4 | 1687 | lsp = lsp_search(&area->lspdb[lvl - 1], id); |
d62a17ae | 1688 | if (!lsp) { |
1689 | sched_debug( | |
1690 | "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.", | |
1691 | area->area_tag); | |
1692 | continue; | |
1693 | } | |
1694 | ||
1695 | /* | |
1696 | * Throttle avoidance | |
1697 | */ | |
1698 | sched_debug( | |
1699 | "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld", | |
1700 | area->area_tag, (long long)lsp->last_generated, | |
1701 | (long long)now); | |
e16d030c | 1702 | EVENT_OFF(area->t_lsp_refresh[lvl - 1]); |
d62a17ae | 1703 | diff = now - lsp->last_generated; |
690497fb G |
1704 | if (diff < area->lsp_gen_interval[lvl - 1] |
1705 | && !(area->bfd_signalled_down)) { | |
d62a17ae | 1706 | timeout = |
1707 | 1000 * (area->lsp_gen_interval[lvl - 1] - diff); | |
1708 | sched_debug( | |
1709 | "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval", | |
1710 | area->area_tag, timeout); | |
1711 | } else { | |
1712 | /* | |
690497fb | 1713 | * Schedule LSP refresh ASAP |
d62a17ae | 1714 | */ |
690497fb G |
1715 | if (area->bfd_signalled_down) { |
1716 | sched_debug( | |
ec7b1425 | 1717 | "ISIS (%s): Scheduling immediately due to BFD 'down' message.", |
690497fb G |
1718 | area->area_tag); |
1719 | area->bfd_signalled_down = false; | |
1720 | area->bfd_force_spf_refresh = true; | |
d2232b3e | 1721 | timeout = 0; |
690497fb | 1722 | } else { |
d2232b3e EDP |
1723 | int64_t time_since_last = monotime_since( |
1724 | &area->last_lsp_refresh_event[lvl - 1], | |
1725 | NULL); | |
1726 | timeout = time_since_last < 100000L | |
1727 | ? (100000L - time_since_last)/1000 | |
1728 | : 0; | |
1729 | if (timeout > 0) | |
1730 | sched_debug( | |
1731 | "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution in %ld ms due to the instability timer.", | |
1732 | area->area_tag, timeout); | |
1733 | else | |
1734 | sched_debug( | |
1735 | "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution now.", | |
1736 | area->area_tag); | |
690497fb | 1737 | } |
d62a17ae | 1738 | } |
1739 | ||
1740 | area->lsp_regenerate_pending[lvl - 1] = 1; | |
907a2395 DS |
1741 | event_add_timer_msec(master, lsp_refresh, |
1742 | &area->lsp_refresh_arg[lvl - 1], timeout, | |
1743 | &area->t_lsp_refresh[lvl - 1]); | |
d62a17ae | 1744 | } |
1745 | ||
1746 | if (all_pseudo) { | |
1747 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, cnode, circuit)) | |
1748 | lsp_regenerate_schedule_pseudo(circuit, level); | |
1749 | } | |
1750 | ||
1751 | return ISIS_OK; | |
eb5d44eb | 1752 | } |
1753 | ||
1754 | /* | |
1755 | * Funcs for pseudonode LSPs | |
1756 | */ | |
1757 | ||
1758 | /* | |
d62a17ae | 1759 | * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs |
eb5d44eb | 1760 | */ |
d62a17ae | 1761 | static void lsp_build_pseudo(struct isis_lsp *lsp, struct isis_circuit *circuit, |
1762 | int level) | |
eb5d44eb | 1763 | { |
d62a17ae | 1764 | struct isis_adjacency *adj; |
d62a17ae | 1765 | struct list *adj_list; |
1766 | struct listnode *node; | |
1767 | struct isis_area *area = circuit->area; | |
173f8887 | 1768 | uint16_t mtid; |
d62a17ae | 1769 | |
af8ac8f9 CF |
1770 | lsp_clear_data(lsp); |
1771 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 1772 | lsp_debug( |
5d39a819 OD |
1773 | "ISIS (%s): Constructing pseudo LSP %pLS for interface %s level %d", |
1774 | area->area_tag, lsp->hdr.lsp_id, circuit->interface->name, | |
1775 | level); | |
d62a17ae | 1776 | |
1777 | lsp->level = level; | |
1778 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
f3abc412 | 1779 | lsp->hdr.lsp_bits = lsp_bits_generate( |
1780 | level, 0, circuit->area->attached_bit_send, area); | |
d62a17ae | 1781 | |
1782 | /* | |
1783 | * add self to IS neighbours | |
1784 | */ | |
af8ac8f9 CF |
1785 | uint8_t ne_id[ISIS_SYS_ID_LEN + 1]; |
1786 | ||
eab88f36 | 1787 | memcpy(ne_id, area->isis->sysid, ISIS_SYS_ID_LEN); |
af8ac8f9 | 1788 | LSP_PSEUDO_ID(ne_id) = 0; |
d62a17ae | 1789 | |
af8ac8f9 CF |
1790 | if (circuit->area->oldmetric) { |
1791 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
5d39a819 OD |
1792 | lsp_debug("ISIS (%s): Adding %pPN as old-style neighbor (self)", |
1793 | area->area_tag, ne_id); | |
d62a17ae | 1794 | } |
1795 | if (circuit->area->newmetric) { | |
173f8887 OD |
1796 | if (area_is_mt(circuit->area)) |
1797 | mtid = ISIS_MT_IPV4_UNICAST; | |
1798 | else | |
1799 | mtid = ISIS_MT_DISABLE; | |
1800 | isis_tlvs_add_extended_reach(lsp->tlvs, mtid, ne_id, 0, NULL); | |
5d39a819 OD |
1801 | lsp_debug("ISIS (%s): Adding %pPN as te-style neighbor (self)", |
1802 | area->area_tag, ne_id); | |
d62a17ae | 1803 | } |
1804 | ||
1805 | adj_list = list_new(); | |
1806 | isis_adj_build_up_list(circuit->u.bc.adjdb[level - 1], adj_list); | |
1807 | ||
1808 | for (ALL_LIST_ELEMENTS_RO(adj_list, node, adj)) { | |
af8ac8f9 | 1809 | if (!(adj->level & level)) { |
d62a17ae | 1810 | lsp_debug( |
5d39a819 OD |
1811 | "ISIS (%s): Ignoring neighbor %pSY, level does not intersect", |
1812 | area->area_tag, adj->sysid); | |
af8ac8f9 | 1813 | continue; |
f390d2c7 | 1814 | } |
d62a17ae | 1815 | |
af8ac8f9 CF |
1816 | if (!(level == IS_LEVEL_1 |
1817 | && adj->sys_type == ISIS_SYSTYPE_L1_IS) | |
1818 | && !(level == IS_LEVEL_1 | |
1819 | && adj->sys_type == ISIS_SYSTYPE_L2_IS | |
1820 | && adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
1821 | && !(level == IS_LEVEL_2 | |
1822 | && adj->sys_type == ISIS_SYSTYPE_L2_IS)) { | |
1823 | lsp_debug( | |
5d39a819 OD |
1824 | "ISIS (%s): Ignoring neighbor %pSY, level does not match", |
1825 | area->area_tag, adj->sysid); | |
af8ac8f9 CF |
1826 | continue; |
1827 | } | |
d62a17ae | 1828 | |
af8ac8f9 CF |
1829 | memcpy(ne_id, adj->sysid, ISIS_SYS_ID_LEN); |
1830 | if (circuit->area->oldmetric) { | |
1831 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
1832 | lsp_debug( | |
5d39a819 OD |
1833 | "ISIS (%s): Adding %pPN as old-style neighbor (peer)", |
1834 | area->area_tag, ne_id); | |
af8ac8f9 CF |
1835 | } |
1836 | if (circuit->area->newmetric) { | |
1837 | isis_tlvs_add_extended_reach(lsp->tlvs, | |
1838 | ISIS_MT_IPV4_UNICAST, | |
d607c409 | 1839 | ne_id, 0, NULL); |
af8ac8f9 | 1840 | lsp_debug( |
5d39a819 OD |
1841 | "ISIS (%s): Adding %pPN as te-style neighbor (peer)", |
1842 | area->area_tag, ne_id); | |
af8ac8f9 CF |
1843 | } |
1844 | } | |
6a154c88 | 1845 | list_delete(&adj_list); |
d62a17ae | 1846 | return; |
eb5d44eb | 1847 | } |
1848 | ||
d62a17ae | 1849 | int lsp_generate_pseudo(struct isis_circuit *circuit, int level) |
3f045a08 | 1850 | { |
4bef0ec4 | 1851 | struct lspdb_head *head = &circuit->area->lspdb[level - 1]; |
d62a17ae | 1852 | struct isis_lsp *lsp; |
d7c0a89a QY |
1853 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
1854 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1855 | |
1856 | if ((circuit->is_type & level) != level | |
1857 | || (circuit->state != C_STATE_UP) | |
1858 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1859 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1860 | return ISIS_ERROR; | |
1861 | ||
99e5d4af | 1862 | memcpy(lsp_id, circuit->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1863 | LSP_FRAGMENT(lsp_id) = 0; |
1864 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1865 | ||
1866 | /* | |
1867 | * If for some reason have a pseudo LSP in the db already -> regenerate | |
1868 | */ | |
4bef0ec4 | 1869 | if (lsp_search(head, lsp_id)) |
d62a17ae | 1870 | return lsp_regenerate_schedule_pseudo(circuit, level); |
1871 | ||
1872 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); | |
1873 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
1874 | lsp = lsp_new(circuit->area, lsp_id, rem_lifetime, 1, | |
f3abc412 | 1875 | lsp_bits_generate(circuit->area->is_type, 0, |
1876 | circuit->area->attached_bit_send, | |
1877 | circuit->area), | |
1878 | 0, NULL, level); | |
d62a17ae | 1879 | lsp->area = circuit->area; |
1880 | ||
1881 | lsp_build_pseudo(lsp, circuit, level); | |
af8ac8f9 | 1882 | lsp_pack_pdu(lsp); |
d62a17ae | 1883 | lsp->own_lsp = 1; |
4bef0ec4 | 1884 | lsp_insert(head, lsp); |
9b39405f | 1885 | lsp_flood(lsp, NULL); |
d62a17ae | 1886 | |
1887 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
e16d030c | 1888 | EVENT_OFF(circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); |
d62a17ae | 1889 | circuit->lsp_regenerate_pending[level - 1] = 0; |
1890 | if (level == IS_LEVEL_1) | |
907a2395 DS |
1891 | event_add_timer(master, lsp_l1_refresh_pseudo, circuit, |
1892 | refresh_time, | |
1893 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
d62a17ae | 1894 | else if (level == IS_LEVEL_2) |
907a2395 DS |
1895 | event_add_timer(master, lsp_l2_refresh_pseudo, circuit, |
1896 | refresh_time, | |
1897 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
d62a17ae | 1898 | |
e740f9c1 | 1899 | if (IS_DEBUG_UPDATE_PACKETS) { |
d62a17ae | 1900 | zlog_debug( |
5d39a819 OD |
1901 | "ISIS-Upd (%s): Built L%d Pseudo LSP %pLS, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus, refresh %hus", |
1902 | circuit->area->area_tag, level, lsp->hdr.lsp_id, | |
1903 | lsp->hdr.pdu_len, lsp->hdr.seqno, lsp->hdr.checksum, | |
af8ac8f9 | 1904 | lsp->hdr.rem_lifetime, refresh_time); |
d62a17ae | 1905 | } |
1906 | ||
1907 | return ISIS_OK; | |
3f045a08 JB |
1908 | } |
1909 | ||
d62a17ae | 1910 | static int lsp_regenerate_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1911 | { |
4bef0ec4 | 1912 | struct lspdb_head *head = &circuit->area->lspdb[level - 1]; |
d62a17ae | 1913 | struct isis_lsp *lsp; |
d7c0a89a QY |
1914 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
1915 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1916 | |
1917 | if ((circuit->is_type & level) != level | |
1918 | || (circuit->state != C_STATE_UP) | |
1919 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1920 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1921 | return ISIS_ERROR; | |
1922 | ||
99e5d4af | 1923 | memcpy(lsp_id, circuit->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1924 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; |
1925 | LSP_FRAGMENT(lsp_id) = 0; | |
1926 | ||
4bef0ec4 | 1927 | lsp = lsp_search(head, lsp_id); |
d62a17ae | 1928 | |
1929 | if (!lsp) { | |
450971aa | 1930 | flog_err(EC_LIB_DEVELOPMENT, |
5d39a819 OD |
1931 | "lsp_regenerate_pseudo: no l%d LSP %pLS found!", level, |
1932 | lsp_id); | |
d62a17ae | 1933 | return ISIS_ERROR; |
1934 | } | |
d62a17ae | 1935 | |
d62a17ae | 1936 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); |
af8ac8f9 CF |
1937 | lsp->hdr.rem_lifetime = rem_lifetime; |
1938 | lsp_build_pseudo(lsp, circuit, level); | |
1939 | lsp_inc_seqno(lsp, 0); | |
d62a17ae | 1940 | lsp->last_generated = time(NULL); |
9b39405f | 1941 | lsp_flood(lsp, NULL); |
d62a17ae | 1942 | |
1943 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1944 | if (level == IS_LEVEL_1) | |
907a2395 DS |
1945 | event_add_timer(master, lsp_l1_refresh_pseudo, circuit, |
1946 | refresh_time, | |
1947 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
d62a17ae | 1948 | else if (level == IS_LEVEL_2) |
907a2395 DS |
1949 | event_add_timer(master, lsp_l2_refresh_pseudo, circuit, |
1950 | refresh_time, | |
1951 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
d62a17ae | 1952 | |
e740f9c1 | 1953 | if (IS_DEBUG_UPDATE_PACKETS) { |
d62a17ae | 1954 | zlog_debug( |
5d39a819 OD |
1955 | "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %pLS, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus, refresh %hus", |
1956 | circuit->area->area_tag, level, lsp->hdr.lsp_id, | |
1957 | lsp->hdr.pdu_len, lsp->hdr.seqno, lsp->hdr.checksum, | |
af8ac8f9 | 1958 | lsp->hdr.rem_lifetime, refresh_time); |
d62a17ae | 1959 | } |
1960 | ||
1961 | return ISIS_OK; | |
eb5d44eb | 1962 | } |
1963 | ||
3f045a08 JB |
1964 | /* |
1965 | * Something has changed or periodic refresh -> regenerate pseudo LSP | |
1966 | */ | |
e6685141 | 1967 | static void lsp_l1_refresh_pseudo(struct event *thread) |
eb5d44eb | 1968 | { |
d62a17ae | 1969 | struct isis_circuit *circuit; |
d7c0a89a | 1970 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
eb5d44eb | 1971 | |
e16d030c | 1972 | circuit = EVENT_ARG(thread); |
f390d2c7 | 1973 | |
d62a17ae | 1974 | circuit->u.bc.t_refresh_pseudo_lsp[0] = NULL; |
1975 | circuit->lsp_regenerate_pending[0] = 0; | |
13c48f72 | 1976 | |
d62a17ae | 1977 | if ((circuit->u.bc.is_dr[0] == 0) |
1978 | || (circuit->is_type & IS_LEVEL_1) == 0) { | |
99e5d4af | 1979 | memcpy(id, circuit->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1980 | LSP_PSEUDO_ID(id) = circuit->circuit_id; |
1981 | LSP_FRAGMENT(id) = 0; | |
1982 | lsp_purge_pseudo(id, circuit, IS_LEVEL_1); | |
cc9f21da | 1983 | return; |
d62a17ae | 1984 | } |
eb5d44eb | 1985 | |
cc9f21da | 1986 | lsp_regenerate_pseudo(circuit, IS_LEVEL_1); |
eb5d44eb | 1987 | } |
1988 | ||
e6685141 | 1989 | static void lsp_l2_refresh_pseudo(struct event *thread) |
eb5d44eb | 1990 | { |
d62a17ae | 1991 | struct isis_circuit *circuit; |
d7c0a89a | 1992 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
f390d2c7 | 1993 | |
e16d030c | 1994 | circuit = EVENT_ARG(thread); |
f390d2c7 | 1995 | |
d62a17ae | 1996 | circuit->u.bc.t_refresh_pseudo_lsp[1] = NULL; |
1997 | circuit->lsp_regenerate_pending[1] = 0; | |
13c48f72 | 1998 | |
d62a17ae | 1999 | if ((circuit->u.bc.is_dr[1] == 0) |
2000 | || (circuit->is_type & IS_LEVEL_2) == 0) { | |
99e5d4af | 2001 | memcpy(id, circuit->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 2002 | LSP_PSEUDO_ID(id) = circuit->circuit_id; |
2003 | LSP_FRAGMENT(id) = 0; | |
2004 | lsp_purge_pseudo(id, circuit, IS_LEVEL_2); | |
cc9f21da | 2005 | return; |
d62a17ae | 2006 | } |
eb5d44eb | 2007 | |
cc9f21da | 2008 | lsp_regenerate_pseudo(circuit, IS_LEVEL_2); |
eb5d44eb | 2009 | } |
2010 | ||
d62a17ae | 2011 | int lsp_regenerate_schedule_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 2012 | { |
d62a17ae | 2013 | struct isis_lsp *lsp; |
d7c0a89a | 2014 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 2015 | time_t now, diff; |
2016 | long timeout; | |
2017 | int lvl; | |
2018 | struct isis_area *area = circuit->area; | |
2019 | ||
2020 | if (circuit->circ_type != CIRCUIT_T_BROADCAST | |
2021 | || circuit->state != C_STATE_UP) | |
2022 | return ISIS_OK; | |
2023 | ||
2024 | sched_debug( | |
2025 | "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s", | |
2026 | area->area_tag, circuit_t2string(level), | |
2027 | circuit->interface->name); | |
2028 | ||
eab88f36 | 2029 | memcpy(lsp_id, area->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 2030 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; |
2031 | LSP_FRAGMENT(lsp_id) = 0; | |
2032 | now = time(NULL); | |
2033 | ||
2034 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
2035 | sched_debug( | |
2036 | "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled", | |
2037 | area->area_tag, lvl); | |
2038 | ||
2039 | if (!((level & lvl) && (circuit->is_type & lvl))) { | |
2040 | sched_debug("ISIS (%s): Level is not active on circuit", | |
2041 | area->area_tag); | |
2042 | continue; | |
2043 | } | |
2044 | ||
2045 | if (circuit->u.bc.is_dr[lvl - 1] == 0) { | |
2046 | sched_debug( | |
2047 | "ISIS (%s): This IS is not DR, nothing to do.", | |
2048 | area->area_tag); | |
2049 | continue; | |
2050 | } | |
2051 | ||
2052 | if (circuit->lsp_regenerate_pending[lvl - 1]) { | |
4f830a07 | 2053 | struct timeval remain = event_timer_remain( |
d62a17ae | 2054 | circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); |
2055 | sched_debug( | |
3efd0893 | 2056 | "ISIS (%s): Regenerate is already pending, nothing todo. (Due in %lld.%03lld seconds)", |
d62a17ae | 2057 | area->area_tag, (long long)remain.tv_sec, |
2058 | (long long)remain.tv_usec / 1000); | |
2059 | continue; | |
2060 | } | |
2061 | ||
4bef0ec4 | 2062 | lsp = lsp_search(&circuit->area->lspdb[lvl - 1], lsp_id); |
d62a17ae | 2063 | if (!lsp) { |
2064 | sched_debug( | |
2065 | "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.", | |
2066 | area->area_tag); | |
2067 | continue; | |
2068 | } | |
2069 | ||
2070 | /* | |
2071 | * Throttle avoidance | |
2072 | */ | |
2073 | sched_debug( | |
2074 | "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld", | |
2075 | area->area_tag, (long long)lsp->last_generated, | |
2076 | (long long)now); | |
e16d030c | 2077 | EVENT_OFF(circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); |
d62a17ae | 2078 | diff = now - lsp->last_generated; |
2079 | if (diff < circuit->area->lsp_gen_interval[lvl - 1]) { | |
9d303b37 DL |
2080 | timeout = |
2081 | 1000 * (circuit->area->lsp_gen_interval[lvl - 1] | |
2082 | - diff); | |
d62a17ae | 2083 | sched_debug( |
2084 | "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval", | |
2085 | area->area_tag, timeout); | |
2086 | } else { | |
2087 | timeout = 100; | |
2088 | sched_debug( | |
3efd0893 | 2089 | "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution in %ld ms.", |
d62a17ae | 2090 | area->area_tag, timeout); |
2091 | } | |
2092 | ||
2093 | circuit->lsp_regenerate_pending[lvl - 1] = 1; | |
2094 | ||
2095 | if (lvl == IS_LEVEL_1) { | |
907a2395 | 2096 | event_add_timer_msec( |
d62a17ae | 2097 | master, lsp_l1_refresh_pseudo, circuit, timeout, |
2098 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
2099 | } else if (lvl == IS_LEVEL_2) { | |
907a2395 | 2100 | event_add_timer_msec( |
d62a17ae | 2101 | master, lsp_l2_refresh_pseudo, circuit, timeout, |
2102 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
2103 | } | |
2104 | } | |
2105 | ||
2106 | return ISIS_OK; | |
f390d2c7 | 2107 | } |
eb5d44eb | 2108 | |
2109 | /* | |
2110 | * Walk through LSPs for an area | |
2111 | * - set remaining lifetime | |
eb5d44eb | 2112 | */ |
e6685141 | 2113 | void lsp_tick(struct event *thread) |
eb5d44eb | 2114 | { |
d62a17ae | 2115 | struct isis_area *area; |
d62a17ae | 2116 | struct isis_lsp *lsp; |
d62a17ae | 2117 | int level; |
d7c0a89a | 2118 | uint16_t rem_lifetime; |
8e6fb83b | 2119 | bool fabricd_sync_incomplete = false; |
d62a17ae | 2120 | |
e16d030c | 2121 | area = EVENT_ARG(thread); |
d62a17ae | 2122 | assert(area); |
2123 | area->t_tick = NULL; | |
907a2395 | 2124 | event_add_timer(master, lsp_tick, area, 1, &area->t_tick); |
d62a17ae | 2125 | |
8e6fb83b CF |
2126 | struct isis_circuit *fabricd_init_c = fabricd_initial_sync_circuit(area); |
2127 | ||
d62a17ae | 2128 | /* |
9b39405f | 2129 | * Remove LSPs which have aged out |
d62a17ae | 2130 | */ |
2131 | for (level = 0; level < ISIS_LEVELS; level++) { | |
4bef0ec4 | 2132 | struct isis_lsp *next = lspdb_first(&area->lspdb[level]); |
81fddbe7 | 2133 | frr_each_from (lspdb, &area->lspdb[level], lsp, next) { |
4bef0ec4 DL |
2134 | /* |
2135 | * The lsp rem_lifetime is kept at 0 for MaxAge | |
2136 | * or | |
2137 | * ZeroAgeLifetime depending on explicit purge | |
2138 | * or | |
2139 | * natural age out. So schedule spf only once | |
2140 | * when | |
2141 | * the first time rem_lifetime becomes 0. | |
2142 | */ | |
2143 | rem_lifetime = lsp->hdr.rem_lifetime; | |
2144 | lsp_set_time(lsp); | |
d62a17ae | 2145 | |
4bef0ec4 DL |
2146 | /* |
2147 | * Schedule may run spf which should be done | |
2148 | * only after | |
2149 | * the lsp rem_lifetime becomes 0 for the first | |
2150 | * time. | |
2151 | * ISO 10589 - 7.3.16.4 first paragraph. | |
2152 | */ | |
2153 | if (rem_lifetime == 1 && lsp->hdr.seqno != 0) { | |
2154 | /* 7.3.16.4 a) set SRM flags on all */ | |
2155 | /* 7.3.16.4 b) retain only the header */ | |
2156 | if (lsp->area->purge_originator) | |
2157 | lsp_purge(lsp, lsp->level, NULL); | |
2158 | else | |
2159 | lsp_flood(lsp, NULL); | |
2160 | /* 7.3.16.4 c) record the time to purge | |
2161 | * FIXME */ | |
2162 | isis_spf_schedule(lsp->area, lsp->level); | |
d9884a75 | 2163 | isis_te_lsp_event(lsp, LSP_TICK); |
4bef0ec4 | 2164 | } |
0c77e178 | 2165 | |
4bef0ec4 DL |
2166 | if (lsp->age_out == 0) { |
2167 | zlog_debug( | |
5d39a819 | 2168 | "ISIS-Upd (%s): L%u LSP %pLS seq 0x%08x aged out", |
4bef0ec4 | 2169 | area->area_tag, lsp->level, |
5d39a819 | 2170 | lsp->hdr.lsp_id, lsp->hdr.seqno); |
4bef0ec4 DL |
2171 | |
2172 | /* if we're aging out fragment 0, lsp_destroy() | |
2173 | * below will delete all other fragments too, | |
2174 | * so we need to skip over those | |
2175 | */ | |
2176 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) | |
2177 | while (next && | |
2178 | !memcmp(next->hdr.lsp_id, | |
2179 | lsp->hdr.lsp_id, | |
2180 | ISIS_SYS_ID_LEN + 1)) | |
2181 | next = lspdb_next( | |
2182 | &area->lspdb[level], | |
2183 | next); | |
2184 | ||
2185 | lspdb_del(&area->lspdb[level], lsp); | |
2186 | lsp_destroy(lsp); | |
2187 | lsp = NULL; | |
2188 | } | |
8e6fb83b | 2189 | |
4bef0ec4 DL |
2190 | if (fabricd_init_c && lsp) { |
2191 | fabricd_sync_incomplete |= | |
2192 | ISIS_CHECK_FLAG(lsp->SSNflags, | |
2193 | fabricd_init_c); | |
d62a17ae | 2194 | } |
2195 | } | |
2196 | } | |
2197 | ||
9b39405f CF |
2198 | if (fabricd_init_c |
2199 | && !fabricd_sync_incomplete | |
2200 | && !isis_tx_queue_len(fabricd_init_c->tx_queue)) { | |
8e6fb83b | 2201 | fabricd_initial_sync_finish(area); |
9b39405f | 2202 | } |
eb5d44eb | 2203 | } |
2204 | ||
d7c0a89a | 2205 | void lsp_purge_pseudo(uint8_t *id, struct isis_circuit *circuit, int level) |
eb5d44eb | 2206 | { |
d62a17ae | 2207 | struct isis_lsp *lsp; |
d62a17ae | 2208 | |
4bef0ec4 | 2209 | lsp = lsp_search(&circuit->area->lspdb[level - 1], id); |
d62a17ae | 2210 | if (!lsp) |
2211 | return; | |
2212 | ||
2c92bee4 | 2213 | lsp_purge(lsp, level, NULL); |
eb5d44eb | 2214 | } |
2215 | ||
2216 | /* | |
d62a17ae | 2217 | * Purge own LSP that is received and we don't have. |
eb5d44eb | 2218 | * -> Do as in 7.3.16.4 |
2219 | */ | |
af8ac8f9 | 2220 | void lsp_purge_non_exist(int level, struct isis_lsp_hdr *hdr, |
d62a17ae | 2221 | struct isis_area *area) |
eb5d44eb | 2222 | { |
d62a17ae | 2223 | struct isis_lsp *lsp; |
2224 | ||
2225 | /* | |
2226 | * We need to create the LSP to be purged | |
2227 | */ | |
2228 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
2229 | lsp->area = area; | |
2230 | lsp->level = level; | |
d07067ba | 2231 | lsp_adjust_stream(lsp); |
af8ac8f9 | 2232 | lsp->age_out = ZERO_AGE_LIFETIME; |
6f004b60 | 2233 | lsp->area->lsp_purge_count[level - 1]++; |
d62a17ae | 2234 | |
af8ac8f9 CF |
2235 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
2236 | lsp->hdr.rem_lifetime = 0; | |
d62a17ae | 2237 | |
2c92bee4 CF |
2238 | lsp_purge_add_poi(lsp, NULL); |
2239 | ||
af8ac8f9 | 2240 | lsp_pack_pdu(lsp); |
d62a17ae | 2241 | |
4bef0ec4 | 2242 | lsp_insert(&area->lspdb[lsp->level - 1], lsp); |
9b39405f | 2243 | lsp_flood(lsp, NULL); |
d62a17ae | 2244 | |
2245 | return; | |
eb5d44eb | 2246 | } |
2247 | ||
9b39405f | 2248 | void lsp_set_all_srmflags(struct isis_lsp *lsp, bool set) |
3f045a08 | 2249 | { |
d62a17ae | 2250 | struct listnode *node; |
2251 | struct isis_circuit *circuit; | |
3f045a08 | 2252 | |
d62a17ae | 2253 | assert(lsp); |
3f045a08 | 2254 | |
9b39405f CF |
2255 | if (!lsp->area) |
2256 | return; | |
3f045a08 | 2257 | |
9b39405f CF |
2258 | struct list *circuit_list = lsp->area->circuit_list; |
2259 | for (ALL_LIST_ELEMENTS_RO(circuit_list, node, circuit)) { | |
2260 | if (set) { | |
2261 | isis_tx_queue_add(circuit->tx_queue, lsp, | |
2262 | TX_LSP_NORMAL); | |
2263 | } else { | |
2264 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
d62a17ae | 2265 | } |
2266 | } | |
3f045a08 | 2267 | } |
9b39405f | 2268 | |
ddb33326 CF |
2269 | void _lsp_flood(struct isis_lsp *lsp, struct isis_circuit *circuit, |
2270 | const char *func, const char *file, int line) | |
9b39405f | 2271 | { |
e740f9c1 | 2272 | if (IS_DEBUG_FLOODING) { |
5d39a819 OD |
2273 | zlog_debug("Flooding LSP %pLS%s%s (From %s %s:%d)", |
2274 | lsp->hdr.lsp_id, circuit ? " except on " : "", | |
2275 | circuit ? circuit->interface->name : "", func, file, | |
2276 | line); | |
ddb33326 CF |
2277 | } |
2278 | ||
37212c41 | 2279 | if (!fabricd) |
9d224819 | 2280 | lsp_set_all_srmflags(lsp, true); |
37212c41 | 2281 | else |
1eb7c3a1 | 2282 | fabricd_lsp_flood(lsp, circuit); |
37212c41 CF |
2283 | |
2284 | if (circuit) | |
2285 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
9b39405f | 2286 | } |
a5b5e946 CF |
2287 | |
2288 | static int lsp_handle_adj_state_change(struct isis_adjacency *adj) | |
2289 | { | |
2290 | lsp_regenerate_schedule(adj->circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0); | |
77d73edf | 2291 | |
2292 | /* when an adjacency state changes determine if we need to | |
2293 | * change attach_bits in other area's LSPs | |
2294 | */ | |
2295 | isis_reset_attach_bit(adj); | |
2296 | ||
a5b5e946 CF |
2297 | return 0; |
2298 | } | |
2299 | ||
98a49636 RW |
2300 | /* |
2301 | * Iterate over all IP reachability TLVs in a LSP (all fragments) of the given | |
2302 | * address-family and MT-ID. | |
2303 | */ | |
2304 | int isis_lsp_iterate_ip_reach(struct isis_lsp *lsp, int family, uint16_t mtid, | |
2305 | lsp_ip_reach_iter_cb cb, void *arg) | |
2306 | { | |
2307 | bool pseudo_lsp = LSP_PSEUDO_ID(lsp->hdr.lsp_id); | |
2308 | struct isis_lsp *frag; | |
2309 | struct listnode *node; | |
2310 | ||
2311 | if (lsp->hdr.seqno == 0 || lsp->hdr.rem_lifetime == 0) | |
2312 | return LSP_ITER_CONTINUE; | |
2313 | ||
d9884a75 | 2314 | /* Parse LSP */ |
98a49636 RW |
2315 | if (lsp->tlvs) { |
2316 | if (!fabricd && !pseudo_lsp && family == AF_INET | |
2317 | && mtid == ISIS_MT_IPV4_UNICAST) { | |
2318 | struct isis_item_list *reachs[] = { | |
2319 | &lsp->tlvs->oldstyle_ip_reach, | |
2320 | &lsp->tlvs->oldstyle_ip_reach_ext}; | |
2321 | ||
2322 | for (unsigned int i = 0; i < array_size(reachs); i++) { | |
2323 | struct isis_oldstyle_ip_reach *r; | |
2324 | ||
2325 | for (r = (struct isis_oldstyle_ip_reach *) | |
2326 | reachs[i] | |
2327 | ->head; | |
2328 | r; r = r->next) { | |
2329 | bool external = i ? true : false; | |
2330 | ||
2331 | if ((*cb)((struct prefix *)&r->prefix, | |
2332 | r->metric, external, NULL, | |
2333 | arg) | |
2334 | == LSP_ITER_STOP) | |
2335 | return LSP_ITER_STOP; | |
2336 | } | |
2337 | } | |
2338 | } | |
2339 | ||
2340 | if (!pseudo_lsp && family == AF_INET) { | |
2341 | struct isis_item_list *ipv4_reachs; | |
2342 | ||
2343 | if (mtid == ISIS_MT_IPV4_UNICAST) | |
2344 | ipv4_reachs = &lsp->tlvs->extended_ip_reach; | |
2345 | else | |
2346 | ipv4_reachs = isis_lookup_mt_items( | |
2347 | &lsp->tlvs->mt_ip_reach, mtid); | |
2348 | ||
2349 | struct isis_extended_ip_reach *r; | |
2350 | for (r = ipv4_reachs ? (struct isis_extended_ip_reach *) | |
2351 | ipv4_reachs->head | |
2352 | : NULL; | |
2353 | r; r = r->next) { | |
2354 | if ((*cb)((struct prefix *)&r->prefix, | |
2355 | r->metric, false, r->subtlvs, arg) | |
2356 | == LSP_ITER_STOP) | |
2357 | return LSP_ITER_STOP; | |
2358 | } | |
2359 | } | |
2360 | ||
2361 | if (!pseudo_lsp && family == AF_INET6) { | |
2362 | struct isis_item_list *ipv6_reachs; | |
2363 | struct isis_ipv6_reach *r; | |
2364 | ||
2365 | if (mtid == ISIS_MT_IPV4_UNICAST) | |
2366 | ipv6_reachs = &lsp->tlvs->ipv6_reach; | |
2367 | else | |
2368 | ipv6_reachs = isis_lookup_mt_items( | |
2369 | &lsp->tlvs->mt_ipv6_reach, mtid); | |
2370 | ||
2371 | for (r = ipv6_reachs ? (struct isis_ipv6_reach *) | |
2372 | ipv6_reachs->head | |
2373 | : NULL; | |
2374 | r; r = r->next) { | |
2375 | if ((*cb)((struct prefix *)&r->prefix, | |
2376 | r->metric, r->external, r->subtlvs, | |
2377 | arg) | |
2378 | == LSP_ITER_STOP) | |
2379 | return LSP_ITER_STOP; | |
2380 | } | |
2381 | } | |
2382 | } | |
2383 | ||
d9884a75 OD |
2384 | /* Parse LSP fragments if it is not a fragment itself */ |
2385 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) | |
2386 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { | |
2387 | if (!frag->tlvs) | |
2388 | continue; | |
98a49636 | 2389 | |
d9884a75 OD |
2390 | if (isis_lsp_iterate_ip_reach(frag, family, mtid, cb, |
2391 | arg) | |
2392 | == LSP_ITER_STOP) | |
2393 | return LSP_ITER_STOP; | |
2394 | } | |
98a49636 RW |
2395 | |
2396 | return LSP_ITER_CONTINUE; | |
2397 | } | |
2398 | ||
2399 | /* | |
2400 | * Iterate over all IS reachability TLVs in a LSP (all fragments) of the given | |
2401 | * MT-ID. | |
2402 | */ | |
2403 | int isis_lsp_iterate_is_reach(struct isis_lsp *lsp, uint16_t mtid, | |
2404 | lsp_is_reach_iter_cb cb, void *arg) | |
2405 | { | |
2406 | bool pseudo_lsp = LSP_PSEUDO_ID(lsp->hdr.lsp_id); | |
2407 | struct isis_lsp *frag; | |
2408 | struct listnode *node; | |
2409 | struct isis_item *head; | |
2410 | struct isis_item_list *te_neighs; | |
2411 | ||
2412 | if (lsp->hdr.seqno == 0 || lsp->hdr.rem_lifetime == 0) | |
2413 | return LSP_ITER_CONTINUE; | |
2414 | ||
d9884a75 | 2415 | /* Parse LSP */ |
98a49636 RW |
2416 | if (lsp->tlvs) { |
2417 | if (pseudo_lsp || mtid == ISIS_MT_IPV4_UNICAST) { | |
2418 | head = lsp->tlvs->oldstyle_reach.head; | |
2419 | for (struct isis_oldstyle_reach *reach = | |
2420 | (struct isis_oldstyle_reach *)head; | |
2421 | reach; reach = reach->next) { | |
2422 | if ((*cb)(reach->id, reach->metric, true, NULL, | |
2423 | arg) | |
2424 | == LSP_ITER_STOP) | |
2425 | return LSP_ITER_STOP; | |
2426 | } | |
2427 | } | |
2428 | ||
2429 | if (pseudo_lsp || mtid == ISIS_MT_IPV4_UNICAST) | |
2430 | te_neighs = &lsp->tlvs->extended_reach; | |
2431 | else | |
2432 | te_neighs = | |
2433 | isis_get_mt_items(&lsp->tlvs->mt_reach, mtid); | |
2434 | if (te_neighs) { | |
2435 | head = te_neighs->head; | |
2436 | for (struct isis_extended_reach *reach = | |
2437 | (struct isis_extended_reach *)head; | |
2438 | reach; reach = reach->next) { | |
2439 | if ((*cb)(reach->id, reach->metric, false, | |
2440 | reach->subtlvs, arg) | |
2441 | == LSP_ITER_STOP) | |
2442 | return LSP_ITER_STOP; | |
2443 | } | |
2444 | } | |
2445 | } | |
2446 | ||
d9884a75 OD |
2447 | /* Parse LSP fragments if it not a fragment itself. */ |
2448 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) | |
2449 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { | |
2450 | if (!frag->tlvs) | |
2451 | continue; | |
98a49636 | 2452 | |
d9884a75 OD |
2453 | if (isis_lsp_iterate_is_reach(frag, mtid, cb, arg) |
2454 | == LSP_ITER_STOP) | |
2455 | return LSP_ITER_STOP; | |
2456 | } | |
98a49636 RW |
2457 | |
2458 | return LSP_ITER_CONTINUE; | |
2459 | } | |
2460 | ||
a5b5e946 CF |
2461 | void lsp_init(void) |
2462 | { | |
49b27ea2 | 2463 | device_startup = true; |
a5b5e946 CF |
2464 | hook_register(isis_adj_state_change_hook, |
2465 | lsp_handle_adj_state_change); | |
2466 | } |