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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" | |
cb37cb33 | 15 | #include "event.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" |
eb5d44eb | 49 | |
66b9a381 DL |
50 | DEFINE_MTYPE_STATIC(ISISD, ISIS_LSP, "ISIS LSP"); |
51 | ||
e6685141 DS |
52 | static void lsp_refresh(struct event *thread); |
53 | static void lsp_l1_refresh_pseudo(struct event *thread); | |
54 | static void lsp_l2_refresh_pseudo(struct event *thread); | |
3f045a08 | 55 | |
4bef0ec4 DL |
56 | static void lsp_destroy(struct isis_lsp *lsp); |
57 | ||
49b27ea2 IL |
58 | static bool device_startup; |
59 | ||
d7c0a89a | 60 | int lsp_id_cmp(uint8_t *id1, uint8_t *id2) |
f390d2c7 | 61 | { |
d62a17ae | 62 | return memcmp(id1, id2, ISIS_SYS_ID_LEN + 2); |
eb5d44eb | 63 | } |
64 | ||
4bef0ec4 | 65 | int lspdb_compare(const struct isis_lsp *a, const struct isis_lsp *b) |
eb5d44eb | 66 | { |
4bef0ec4 | 67 | return memcmp(a->hdr.lsp_id, b->hdr.lsp_id, sizeof(a->hdr.lsp_id)); |
eb5d44eb | 68 | } |
69 | ||
4bef0ec4 | 70 | void lsp_db_init(struct lspdb_head *head) |
eb5d44eb | 71 | { |
4bef0ec4 DL |
72 | lspdb_init(head); |
73 | } | |
d62a17ae | 74 | |
4bef0ec4 DL |
75 | void lsp_db_fini(struct lspdb_head *head) |
76 | { | |
77 | struct isis_lsp *lsp; | |
eb5d44eb | 78 | |
4bef0ec4 DL |
79 | while ((lsp = lspdb_pop(head))) |
80 | lsp_destroy(lsp); | |
81 | lspdb_fini(head); | |
82 | } | |
f390d2c7 | 83 | |
4bef0ec4 DL |
84 | struct isis_lsp *lsp_search(struct lspdb_head *head, const uint8_t *id) |
85 | { | |
86 | struct isis_lsp searchfor; | |
87 | memcpy(searchfor.hdr.lsp_id, id, sizeof(searchfor.hdr.lsp_id)); | |
eb5d44eb | 88 | |
4bef0ec4 | 89 | return lspdb_find(head, &searchfor); |
eb5d44eb | 90 | } |
91 | ||
d62a17ae | 92 | static void lsp_clear_data(struct isis_lsp *lsp) |
eb5d44eb | 93 | { |
d62a17ae | 94 | if (!lsp) |
95 | return; | |
96 | ||
af8ac8f9 CF |
97 | isis_free_tlvs(lsp->tlvs); |
98 | lsp->tlvs = NULL; | |
eb5d44eb | 99 | } |
100 | ||
4bef0ec4 | 101 | static void lsp_remove_frags(struct lspdb_head *head, struct list *frags); |
dc84cf14 | 102 | |
d62a17ae | 103 | static void lsp_destroy(struct isis_lsp *lsp) |
eb5d44eb | 104 | { |
58e16237 | 105 | struct listnode *cnode; |
d62a17ae | 106 | struct isis_circuit *circuit; |
107 | ||
108 | if (!lsp) | |
109 | return; | |
110 | ||
58e16237 | 111 | for (ALL_LIST_ELEMENTS_RO(lsp->area->circuit_list, cnode, circuit)) |
9b39405f | 112 | isis_tx_queue_del(circuit->tx_queue, lsp); |
58e16237 | 113 | |
d62a17ae | 114 | ISIS_FLAGS_CLEAR_ALL(lsp->SSNflags); |
d62a17ae | 115 | |
d9884a75 OD |
116 | isis_te_lsp_event(lsp, LSP_DEL); |
117 | ||
d62a17ae | 118 | lsp_clear_data(lsp); |
119 | ||
dc84cf14 CF |
120 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) { |
121 | if (lsp->lspu.frags) { | |
4bef0ec4 DL |
122 | lsp_remove_frags(&lsp->area->lspdb[lsp->level - 1], |
123 | lsp->lspu.frags); | |
dc84cf14 CF |
124 | list_delete(&lsp->lspu.frags); |
125 | } | |
126 | } else { | |
127 | if (lsp->lspu.zero_lsp | |
128 | && lsp->lspu.zero_lsp->lspu.frags) { | |
129 | listnode_delete(lsp->lspu.zero_lsp->lspu.frags, lsp); | |
130 | } | |
d62a17ae | 131 | } |
132 | ||
133 | isis_spf_schedule(lsp->area, lsp->level); | |
134 | ||
135 | if (lsp->pdu) | |
136 | stream_free(lsp->pdu); | |
1eb7c3a1 CF |
137 | |
138 | fabricd_lsp_free(lsp); | |
d62a17ae | 139 | XFREE(MTYPE_ISIS_LSP, lsp); |
eb5d44eb | 140 | } |
141 | ||
eb5d44eb | 142 | /* |
143 | * Remove all the frags belonging to the given lsp | |
144 | */ | |
4bef0ec4 | 145 | static void lsp_remove_frags(struct lspdb_head *head, struct list *frags) |
eb5d44eb | 146 | { |
d62a17ae | 147 | struct listnode *lnode, *lnnode; |
148 | struct isis_lsp *lsp; | |
149 | ||
150 | for (ALL_LIST_ELEMENTS(frags, lnode, lnnode, lsp)) { | |
4bef0ec4 DL |
151 | lsp = lsp_search(head, lsp->hdr.lsp_id); |
152 | lspdb_del(head, lsp); | |
d62a17ae | 153 | lsp_destroy(lsp); |
d62a17ae | 154 | } |
eb5d44eb | 155 | } |
156 | ||
4bef0ec4 | 157 | void lsp_search_and_destroy(struct lspdb_head *head, const uint8_t *id) |
eb5d44eb | 158 | { |
d62a17ae | 159 | struct isis_lsp *lsp; |
160 | ||
4bef0ec4 DL |
161 | lsp = lsp_search(head, id); |
162 | if (lsp) { | |
163 | lspdb_del(head, lsp); | |
d62a17ae | 164 | /* |
165 | * If this is a zero lsp, remove all the frags now | |
166 | */ | |
af8ac8f9 | 167 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) == 0) { |
d62a17ae | 168 | if (lsp->lspu.frags) |
4bef0ec4 | 169 | lsp_remove_frags(head, lsp->lspu.frags); |
d62a17ae | 170 | } else { |
171 | /* | |
172 | * else just remove this frag, from the zero lsps' frag | |
173 | * list | |
174 | */ | |
175 | if (lsp->lspu.zero_lsp | |
176 | && lsp->lspu.zero_lsp->lspu.frags) | |
177 | listnode_delete(lsp->lspu.zero_lsp->lspu.frags, | |
178 | lsp); | |
179 | } | |
180 | lsp_destroy(lsp); | |
d62a17ae | 181 | } |
eb5d44eb | 182 | } |
183 | ||
184 | /* | |
185 | * Compares a LSP to given values | |
186 | * Params are given in net order | |
187 | */ | |
af8ac8f9 CF |
188 | int lsp_compare(char *areatag, struct isis_lsp *lsp, uint32_t seqno, |
189 | uint16_t checksum, uint16_t rem_lifetime) | |
eb5d44eb | 190 | { |
af8ac8f9 CF |
191 | if (lsp->hdr.seqno == seqno && lsp->hdr.checksum == checksum |
192 | && ((lsp->hdr.rem_lifetime == 0 && rem_lifetime == 0) | |
193 | || (lsp->hdr.rem_lifetime != 0 && rem_lifetime != 0))) { | |
e740f9c1 | 194 | if (IS_DEBUG_SNP_PACKETS) { |
d62a17ae | 195 | zlog_debug( |
6cde4b45 | 196 | "ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus", |
af8ac8f9 CF |
197 | areatag, rawlspid_print(lsp->hdr.lsp_id), |
198 | lsp->hdr.seqno, lsp->hdr.checksum, | |
199 | 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( |
6cde4b45 | 226 | "ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus", |
af8ac8f9 CF |
227 | areatag, rawlspid_print(lsp->hdr.lsp_id), seqno, |
228 | checksum, 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) { |
6cde4b45 | 237 | zlog_debug("ISIS-Snp (%s): Compare LSP %s seq 0x%08x, cksum 0x%04hx, lifetime %hus", |
af8ac8f9 CF |
238 | areatag, rawlspid_print(lsp->hdr.lsp_id), seqno, |
239 | checksum, rem_lifetime); | |
d62a17ae | 240 | zlog_debug( |
6cde4b45 | 241 | "ISIS-Snp (%s): is older than ours seq 0x%08x, cksum 0x%04hx, lifetime %hus", |
af8ac8f9 CF |
242 | areatag, lsp->hdr.seqno, lsp->hdr.checksum, |
243 | lsp->hdr.rem_lifetime); | |
d62a17ae | 244 | } |
245 | ||
246 | return LSP_OLDER; | |
eb5d44eb | 247 | } |
248 | ||
c55018ab | 249 | static void put_lsp_hdr(struct isis_lsp *lsp, size_t *len_pointer, bool keep) |
3f045a08 | 250 | { |
af8ac8f9 CF |
251 | uint8_t pdu_type = |
252 | (lsp->level == IS_LEVEL_1) ? L1_LINK_STATE : L2_LINK_STATE; | |
253 | struct isis_lsp_hdr *hdr = &lsp->hdr; | |
254 | struct stream *stream = lsp->pdu; | |
b599ec55 | 255 | size_t orig_getp = 0, orig_endp = 0; |
c55018ab CF |
256 | |
257 | if (keep) { | |
258 | orig_getp = stream_get_getp(lsp->pdu); | |
259 | orig_endp = stream_get_endp(lsp->pdu); | |
260 | } | |
261 | ||
262 | stream_set_getp(lsp->pdu, 0); | |
263 | stream_set_endp(lsp->pdu, 0); | |
af8ac8f9 CF |
264 | |
265 | fill_fixed_hdr(pdu_type, stream); | |
266 | ||
267 | if (len_pointer) | |
268 | *len_pointer = stream_get_endp(stream); | |
269 | stream_putw(stream, hdr->pdu_len); | |
270 | stream_putw(stream, hdr->rem_lifetime); | |
271 | stream_put(stream, hdr->lsp_id, sizeof(hdr->lsp_id)); | |
272 | stream_putl(stream, hdr->seqno); | |
273 | stream_putw(stream, hdr->checksum); | |
274 | stream_putc(stream, hdr->lsp_bits); | |
c55018ab CF |
275 | |
276 | if (keep) { | |
277 | stream_set_endp(lsp->pdu, orig_endp); | |
278 | stream_set_getp(lsp->pdu, orig_getp); | |
279 | } | |
3f045a08 JB |
280 | } |
281 | ||
af8ac8f9 | 282 | static void lsp_add_auth(struct isis_lsp *lsp) |
3f045a08 | 283 | { |
d62a17ae | 284 | struct isis_passwd *passwd; |
af8ac8f9 CF |
285 | passwd = (lsp->level == IS_LEVEL_1) ? &lsp->area->area_passwd |
286 | : &lsp->area->domain_passwd; | |
287 | isis_tlvs_add_auth(lsp->tlvs, passwd); | |
288 | } | |
d62a17ae | 289 | |
af8ac8f9 CF |
290 | static void lsp_pack_pdu(struct isis_lsp *lsp) |
291 | { | |
292 | if (!lsp->tlvs) | |
293 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 294 | |
af8ac8f9 | 295 | lsp_add_auth(lsp); |
d62a17ae | 296 | |
af8ac8f9 | 297 | size_t len_pointer; |
c55018ab | 298 | put_lsp_hdr(lsp, &len_pointer, false); |
af8ac8f9 CF |
299 | isis_pack_tlvs(lsp->tlvs, lsp->pdu, len_pointer, false, true); |
300 | ||
301 | lsp->hdr.pdu_len = stream_get_endp(lsp->pdu); | |
302 | lsp->hdr.checksum = | |
303 | ntohs(fletcher_checksum(STREAM_DATA(lsp->pdu) + 12, | |
304 | stream_get_endp(lsp->pdu) - 12, 12)); | |
3f045a08 JB |
305 | } |
306 | ||
af8ac8f9 | 307 | void lsp_inc_seqno(struct isis_lsp *lsp, uint32_t seqno) |
eb5d44eb | 308 | { |
af8ac8f9 | 309 | uint32_t newseq; |
d62a17ae | 310 | |
af8ac8f9 CF |
311 | if (seqno == 0 || lsp->hdr.seqno > seqno) |
312 | newseq = lsp->hdr.seqno + 1; | |
d62a17ae | 313 | else |
af8ac8f9 | 314 | newseq = seqno + 1; |
d62a17ae | 315 | |
b21b068d EDP |
316 | #ifndef FABRICD |
317 | /* check for overflow */ | |
318 | if (newseq < lsp->hdr.seqno) { | |
319 | /* send northbound notification */ | |
1ee746d9 | 320 | lsp->area->lsp_exceeded_max_counter++; |
321 | isis_notif_lsp_exceed_max(lsp->area, lsp->hdr.lsp_id); | |
b21b068d EDP |
322 | } |
323 | #endif /* ifndef FABRICD */ | |
324 | ||
af8ac8f9 CF |
325 | lsp->hdr.seqno = newseq; |
326 | ||
327 | lsp_pack_pdu(lsp); | |
d62a17ae | 328 | isis_spf_schedule(lsp->area, lsp->level); |
d9884a75 | 329 | isis_te_lsp_event(lsp, LSP_INC); |
af8ac8f9 | 330 | } |
d62a17ae | 331 | |
2c92bee4 CF |
332 | static void lsp_purge_add_poi(struct isis_lsp *lsp, |
333 | const uint8_t *sender) | |
334 | { | |
eab88f36 K |
335 | if (lsp->area == NULL) |
336 | return; | |
337 | ||
2c92bee4 CF |
338 | if (!lsp->area->purge_originator) |
339 | return; | |
340 | ||
341 | /* add purge originator identification */ | |
342 | if (!lsp->tlvs) | |
343 | lsp->tlvs = isis_alloc_tlvs(); | |
eab88f36 K |
344 | isis_tlvs_set_purge_originator(lsp->tlvs, lsp->area->isis->sysid, |
345 | sender); | |
2c92bee4 CF |
346 | isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get()); |
347 | } | |
348 | ||
349 | static void lsp_purge(struct isis_lsp *lsp, int level, | |
350 | const uint8_t *sender) | |
af8ac8f9 CF |
351 | { |
352 | /* reset stream */ | |
353 | lsp_clear_data(lsp); | |
354 | stream_reset(lsp->pdu); | |
355 | ||
356 | /* update header */ | |
357 | lsp->hdr.checksum = 0; | |
358 | lsp->hdr.rem_lifetime = 0; | |
359 | lsp->level = level; | |
360 | lsp->age_out = lsp->area->max_lsp_lifetime[level - 1]; | |
6f004b60 | 361 | lsp->area->lsp_purge_count[level - 1]++; |
af8ac8f9 | 362 | |
2c92bee4 CF |
363 | lsp_purge_add_poi(lsp, sender); |
364 | ||
af8ac8f9 | 365 | lsp_pack_pdu(lsp); |
9b39405f | 366 | lsp_flood(lsp, NULL); |
eb5d44eb | 367 | } |
368 | ||
369 | /* | |
af8ac8f9 | 370 | * Generates checksum for LSP and its frags |
eb5d44eb | 371 | */ |
af8ac8f9 | 372 | static void lsp_seqno_update(struct isis_lsp *lsp0) |
eb5d44eb | 373 | { |
d62a17ae | 374 | struct isis_lsp *lsp; |
375 | struct listnode *node; | |
f390d2c7 | 376 | |
af8ac8f9 | 377 | lsp_inc_seqno(lsp0, 0); |
eb5d44eb | 378 | |
d62a17ae | 379 | if (!lsp0->lspu.frags) |
380 | return; | |
eb5d44eb | 381 | |
af8ac8f9 CF |
382 | for (ALL_LIST_ELEMENTS_RO(lsp0->lspu.frags, node, lsp)) { |
383 | if (lsp->tlvs) | |
384 | lsp_inc_seqno(lsp, 0); | |
8f27aa27 CF |
385 | else if (lsp->hdr.rem_lifetime) { |
386 | /* Purge should only be applied when the fragment has | |
387 | * non-zero remaining lifetime. | |
388 | */ | |
2c92bee4 | 389 | lsp_purge(lsp, lsp0->level, NULL); |
8f27aa27 | 390 | } |
af8ac8f9 | 391 | } |
f390d2c7 | 392 | |
d62a17ae | 393 | return; |
eb5d44eb | 394 | } |
395 | ||
a4777e46 | 396 | bool isis_level2_adj_up(struct isis_area *area) |
f3abc412 | 397 | { |
398 | struct listnode *node, *cnode; | |
399 | struct isis_circuit *circuit; | |
400 | struct list *adjdb; | |
401 | struct isis_adjacency *adj; | |
74ef8dd9 | 402 | |
a4777e46 IR |
403 | if (area->is_type == IS_LEVEL_1) |
404 | return false; | |
405 | ||
74ef8dd9 IR |
406 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, cnode, circuit)) { |
407 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
408 | adjdb = circuit->u.bc.adjdb[1]; | |
409 | if (!adjdb || !adjdb->count) | |
410 | continue; | |
411 | ||
412 | for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj)) { | |
77d73edf | 413 | if (adj->level != ISIS_ADJ_LEVEL1 |
f3abc412 | 414 | && adj->adj_state == ISIS_ADJ_UP) |
415 | return true; | |
416 | } | |
74ef8dd9 IR |
417 | } else if (circuit->circ_type == CIRCUIT_T_P2P |
418 | && circuit->u.p2p.neighbor) { | |
419 | adj = circuit->u.p2p.neighbor; | |
420 | if (adj->level != ISIS_ADJ_LEVEL1 | |
421 | && adj->adj_state == ISIS_ADJ_UP) | |
422 | return true; | |
f3abc412 | 423 | } |
424 | } | |
74ef8dd9 | 425 | |
f3abc412 | 426 | return false; |
427 | } | |
428 | ||
49b27ea2 IL |
429 | /* |
430 | * Unset the overload bit after the timer expires | |
431 | */ | |
e6685141 | 432 | void set_overload_on_start_timer(struct event *thread) |
49b27ea2 IL |
433 | { |
434 | struct isis_area *area = THREAD_ARG(thread); | |
435 | assert(area); | |
436 | ||
437 | area->t_overload_on_startup_timer = NULL; | |
4afc7836 IL |
438 | |
439 | /* Check if set-overload-bit is not currently configured */ | |
440 | if (!area->overload_configured) | |
441 | isis_area_overload_bit_set(area, false); | |
49b27ea2 IL |
442 | } |
443 | ||
74ef8dd9 | 444 | static void isis_reset_attach_bit(struct isis_adjacency *adj) |
77d73edf | 445 | { |
74ef8dd9 | 446 | struct isis_area *area = adj->circuit->area; |
77d73edf | 447 | struct lspdb_head *head; |
448 | struct isis_lsp *lsp; | |
449 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
450 | ||
74ef8dd9 IR |
451 | /* |
452 | * If an L2 adjacency changed its state in L-1-2 area, we have to: | |
453 | * - set the attached bit in L1 LSPs if it's the first L2 adjacency | |
454 | * - remove the attached bit in L1 LSPs if it's the last L2 adjacency | |
77d73edf | 455 | */ |
74ef8dd9 IR |
456 | |
457 | if (area->is_type != IS_LEVEL_1_AND_2 || adj->level == ISIS_ADJ_LEVEL1) | |
77d73edf | 458 | return; |
459 | ||
74ef8dd9 IR |
460 | if (!area->attached_bit_send) |
461 | return; | |
462 | ||
463 | head = &area->lspdb[IS_LEVEL_1 - 1]; | |
464 | memset(lspid, 0, ISIS_SYS_ID_LEN + 2); | |
465 | memcpy(lspid, area->isis->sysid, ISIS_SYS_ID_LEN); | |
466 | ||
467 | lsp = lsp_search(head, lspid); | |
468 | if (!lsp) | |
469 | return; | |
470 | ||
471 | if (adj->adj_state == ISIS_ADJ_UP | |
472 | && !(lsp->hdr.lsp_bits & LSPBIT_ATT)) { | |
473 | sched_debug("ISIS (%s): adj going up regenerate lsp-bits", | |
474 | area->area_tag); | |
475 | lsp_regenerate_schedule(area, IS_LEVEL_1, 0); | |
476 | } else if (adj->adj_state == ISIS_ADJ_DOWN | |
477 | && (lsp->hdr.lsp_bits & LSPBIT_ATT) | |
478 | && !isis_level2_adj_up(area)) { | |
479 | sched_debug("ISIS (%s): adj going down regenerate lsp-bits", | |
480 | area->area_tag); | |
481 | lsp_regenerate_schedule(area, IS_LEVEL_1, 0); | |
77d73edf | 482 | } |
483 | } | |
484 | ||
f3abc412 | 485 | static uint8_t lsp_bits_generate(int level, int overload_bit, int attached_bit, |
486 | struct isis_area *area) | |
e38e0df0 | 487 | { |
d7c0a89a | 488 | uint8_t lsp_bits = 0; |
d0f14921 | 489 | if (area->is_type == IS_LEVEL_1) |
d62a17ae | 490 | lsp_bits = IS_LEVEL_1; |
491 | else | |
492 | lsp_bits = IS_LEVEL_1_AND_2; | |
493 | if (overload_bit) | |
494 | lsp_bits |= overload_bit; | |
f3abc412 | 495 | |
496 | /* only set the attach bit if we are a level-1-2 router and this is | |
497 | * a level-1 LSP and we have a level-2 adjacency up from another area | |
498 | */ | |
499 | if (area->is_type == IS_LEVEL_1_AND_2 && level == IS_LEVEL_1 | |
500 | && attached_bit && isis_level2_adj_up(area)) | |
501 | lsp_bits |= LSPBIT_ATT; | |
d62a17ae | 502 | return lsp_bits; |
e38e0df0 SV |
503 | } |
504 | ||
af8ac8f9 CF |
505 | static void lsp_update_data(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr, |
506 | struct isis_tlvs *tlvs, struct stream *stream, | |
d62a17ae | 507 | struct isis_area *area, int level) |
eb5d44eb | 508 | { |
d62a17ae | 509 | /* free the old lsp data */ |
510 | lsp_clear_data(lsp); | |
511 | ||
512 | /* copying only the relevant part of our stream */ | |
513 | if (lsp->pdu != NULL) | |
514 | stream_free(lsp->pdu); | |
515 | lsp->pdu = stream_dup(stream); | |
516 | ||
af8ac8f9 | 517 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
d62a17ae | 518 | lsp->area = area; |
519 | lsp->level = level; | |
520 | lsp->age_out = ZERO_AGE_LIFETIME; | |
521 | lsp->installed = time(NULL); | |
d62a17ae | 522 | |
af8ac8f9 CF |
523 | lsp->tlvs = tlvs; |
524 | ||
2c92bee4 CF |
525 | if (area->dynhostname && lsp->tlvs->hostname |
526 | && lsp->hdr.rem_lifetime) { | |
240f48b3 IR |
527 | isis_dynhn_insert( |
528 | area->isis, lsp->hdr.lsp_id, lsp->tlvs->hostname, | |
529 | (lsp->hdr.lsp_bits & LSPBIT_IST) == IS_LEVEL_1_AND_2 | |
530 | ? IS_LEVEL_2 | |
531 | : IS_LEVEL_1); | |
d62a17ae | 532 | } |
533 | ||
534 | return; | |
eb5d44eb | 535 | } |
536 | ||
0b8b6cab CF |
537 | static void lsp_link_fragment(struct isis_lsp *lsp, struct isis_lsp *lsp0) |
538 | { | |
539 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) { | |
540 | /* zero lsp -> create list to store fragments */ | |
541 | lsp->lspu.frags = list_new(); | |
542 | } else { | |
543 | /* fragment -> set backpointer and add to zero lsps list */ | |
544 | assert(lsp0); | |
545 | lsp->lspu.zero_lsp = lsp0; | |
546 | listnode_add(lsp0->lspu.frags, lsp); | |
547 | } | |
548 | } | |
549 | ||
af8ac8f9 CF |
550 | void lsp_update(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr, |
551 | struct isis_tlvs *tlvs, struct stream *stream, | |
164066e4 | 552 | struct isis_area *area, int level, bool confusion) |
eb5d44eb | 553 | { |
d62a17ae | 554 | if (lsp->own_lsp) { |
af4c2728 | 555 | flog_err( |
450971aa | 556 | EC_LIB_DEVELOPMENT, |
d62a17ae | 557 | "ISIS-Upd (%s): BUG updating LSP %s still marked as own LSP", |
af8ac8f9 | 558 | area->area_tag, rawlspid_print(lsp->hdr.lsp_id)); |
d62a17ae | 559 | lsp_clear_data(lsp); |
560 | lsp->own_lsp = 0; | |
561 | } | |
562 | ||
164066e4 | 563 | if (confusion) { |
2c92bee4 CF |
564 | lsp_purge(lsp, level, NULL); |
565 | } else { | |
566 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); | |
164066e4 | 567 | } |
d62a17ae | 568 | |
0b8b6cab CF |
569 | if (LSP_FRAGMENT(lsp->hdr.lsp_id) && !lsp->lspu.zero_lsp) { |
570 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
571 | struct isis_lsp *lsp0; | |
eb5d44eb | 572 | |
0b8b6cab CF |
573 | memcpy(lspid, lsp->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); |
574 | LSP_FRAGMENT(lspid) = 0; | |
4bef0ec4 | 575 | lsp0 = lsp_search(&area->lspdb[level - 1], lspid); |
0b8b6cab CF |
576 | if (lsp0) |
577 | lsp_link_fragment(lsp, lsp0); | |
8f5dbe18 | 578 | } |
0b8b6cab | 579 | |
d9884a75 | 580 | if (lsp->hdr.seqno) { |
5304211a | 581 | isis_spf_schedule(lsp->area, lsp->level); |
d9884a75 OD |
582 | isis_te_lsp_event(lsp, LSP_UPD); |
583 | } | |
8f5dbe18 CF |
584 | } |
585 | ||
eb5d44eb | 586 | /* creation of LSP directly from what we received */ |
af8ac8f9 CF |
587 | struct isis_lsp *lsp_new_from_recv(struct isis_lsp_hdr *hdr, |
588 | struct isis_tlvs *tlvs, | |
589 | struct stream *stream, struct isis_lsp *lsp0, | |
590 | struct isis_area *area, int level) | |
eb5d44eb | 591 | { |
d62a17ae | 592 | struct isis_lsp *lsp; |
593 | ||
594 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
af8ac8f9 | 595 | lsp_update_data(lsp, hdr, tlvs, stream, area, level); |
8f5dbe18 | 596 | lsp_link_fragment(lsp, lsp0); |
d62a17ae | 597 | |
598 | return lsp; | |
eb5d44eb | 599 | } |
600 | ||
d07067ba CF |
601 | static void lsp_adjust_stream(struct isis_lsp *lsp) |
602 | { | |
603 | if (lsp->pdu) { | |
604 | if (STREAM_SIZE(lsp->pdu) == LLC_LEN + lsp->area->lsp_mtu) | |
605 | return; | |
606 | stream_free(lsp->pdu); | |
607 | } | |
608 | ||
609 | lsp->pdu = stream_new(LLC_LEN + lsp->area->lsp_mtu); | |
610 | } | |
611 | ||
d7c0a89a | 612 | struct isis_lsp *lsp_new(struct isis_area *area, uint8_t *lsp_id, |
af8ac8f9 | 613 | uint16_t rem_lifetime, uint32_t seqno, |
8f5dbe18 CF |
614 | uint8_t lsp_bits, uint16_t checksum, |
615 | struct isis_lsp *lsp0, int level) | |
eb5d44eb | 616 | { |
d62a17ae | 617 | struct isis_lsp *lsp; |
618 | ||
619 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
620 | lsp->area = area; | |
621 | ||
d07067ba | 622 | lsp_adjust_stream(lsp); |
d62a17ae | 623 | |
d62a17ae | 624 | /* Minimal LSP PDU size */ |
af8ac8f9 CF |
625 | lsp->hdr.pdu_len = ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN; |
626 | memcpy(lsp->hdr.lsp_id, lsp_id, sizeof(lsp->hdr.lsp_id)); | |
627 | lsp->hdr.checksum = checksum; | |
628 | lsp->hdr.seqno = seqno; | |
629 | lsp->hdr.rem_lifetime = rem_lifetime; | |
630 | lsp->hdr.lsp_bits = lsp_bits; | |
d62a17ae | 631 | lsp->level = level; |
632 | lsp->age_out = ZERO_AGE_LIFETIME; | |
8f5dbe18 | 633 | lsp_link_fragment(lsp, lsp0); |
c55018ab | 634 | put_lsp_hdr(lsp, NULL, false); |
d62a17ae | 635 | |
e740f9c1 | 636 | if (IS_DEBUG_EVENTS) |
d62a17ae | 637 | zlog_debug("New LSP with ID %s-%02x-%02x len %d seqnum %08x", |
af8ac8f9 CF |
638 | sysid_print(lsp_id), LSP_PSEUDO_ID(lsp->hdr.lsp_id), |
639 | LSP_FRAGMENT(lsp->hdr.lsp_id), lsp->hdr.pdu_len, | |
640 | lsp->hdr.seqno); | |
d62a17ae | 641 | |
642 | return lsp; | |
eb5d44eb | 643 | } |
644 | ||
4bef0ec4 | 645 | void lsp_insert(struct lspdb_head *head, struct isis_lsp *lsp) |
eb5d44eb | 646 | { |
4bef0ec4 | 647 | lspdb_add(head, lsp); |
d9884a75 | 648 | if (lsp->hdr.seqno) { |
d62a17ae | 649 | isis_spf_schedule(lsp->area, lsp->level); |
d9884a75 OD |
650 | isis_te_lsp_event(lsp, LSP_ADD); |
651 | } | |
eb5d44eb | 652 | } |
653 | ||
654 | /* | |
94829496 | 655 | * Build a list of LSPs with non-zero ht and seqno bounded by start and stop ids |
eb5d44eb | 656 | */ |
4bef0ec4 DL |
657 | void lsp_build_list_nonzero_ht(struct lspdb_head *head, const uint8_t *start_id, |
658 | const uint8_t *stop_id, struct list *list) | |
eb5d44eb | 659 | { |
4bef0ec4 DL |
660 | struct isis_lsp searchfor; |
661 | struct isis_lsp *lsp, *start; | |
662 | ||
663 | memcpy(&searchfor.hdr.lsp_id, start_id, sizeof(searchfor.hdr.lsp_id)); | |
eb5d44eb | 664 | |
4bef0ec4 | 665 | start = lspdb_find_gteq(head, &searchfor); |
81fddbe7 | 666 | frr_each_from (lspdb, head, lsp, start) { |
9337256e CF |
667 | if (memcmp(lsp->hdr.lsp_id, stop_id, |
668 | ISIS_SYS_ID_LEN + 2) > 0) | |
d62a17ae | 669 | break; |
f390d2c7 | 670 | |
94829496 | 671 | if (lsp->hdr.rem_lifetime && lsp->hdr.seqno) |
9337256e CF |
672 | listnode_add(list, lsp); |
673 | } | |
eb5d44eb | 674 | } |
675 | ||
d62a17ae | 676 | static void lsp_set_time(struct isis_lsp *lsp) |
eb5d44eb | 677 | { |
d62a17ae | 678 | assert(lsp); |
f390d2c7 | 679 | |
af8ac8f9 | 680 | if (lsp->hdr.rem_lifetime == 0) { |
d62a17ae | 681 | if (lsp->age_out > 0) |
682 | lsp->age_out--; | |
683 | return; | |
684 | } | |
eb5d44eb | 685 | |
af8ac8f9 CF |
686 | lsp->hdr.rem_lifetime--; |
687 | if (lsp->pdu && stream_get_endp(lsp->pdu) >= 12) | |
688 | stream_putw_at(lsp->pdu, 10, lsp->hdr.rem_lifetime); | |
eb5d44eb | 689 | } |
690 | ||
7533cad7 QY |
691 | void lspid_print(uint8_t *lsp_id, char *dest, size_t dest_len, char dynhost, |
692 | char frag, struct isis *isis) | |
eb5d44eb | 693 | { |
d62a17ae | 694 | struct isis_dynhn *dyn = NULL; |
772270f3 | 695 | char id[SYSID_STRLEN]; |
d62a17ae | 696 | |
697 | if (dynhost) | |
240f48b3 | 698 | dyn = dynhn_find_by_id(isis, lsp_id); |
d62a17ae | 699 | else |
700 | dyn = NULL; | |
701 | ||
702 | if (dyn) | |
4ced1a2c | 703 | snprintf(id, sizeof(id), "%.14s", dyn->hostname); |
d62a17ae | 704 | else if (!memcmp(isis->sysid, lsp_id, ISIS_SYS_ID_LEN) && dynhost) |
4ced1a2c | 705 | snprintf(id, sizeof(id), "%.14s", cmd_hostname_get()); |
d62a17ae | 706 | else |
707 | memcpy(id, sysid_print(lsp_id), 15); | |
eab88f36 | 708 | |
d62a17ae | 709 | if (frag) |
7533cad7 QY |
710 | snprintf(dest, dest_len, "%s.%02x-%02x", id, |
711 | LSP_PSEUDO_ID(lsp_id), LSP_FRAGMENT(lsp_id)); | |
d62a17ae | 712 | else |
7533cad7 | 713 | snprintf(dest, dest_len, "%s.%02x", id, LSP_PSEUDO_ID(lsp_id)); |
eb5d44eb | 714 | } |
715 | ||
f390d2c7 | 716 | /* Convert the lsp attribute bits to attribute string */ |
36228974 | 717 | static const char *lsp_bits2string(uint8_t lsp_bits, char *buf, size_t buf_size) |
f390d2c7 | 718 | { |
36228974 | 719 | char *pos = buf; |
eb5d44eb | 720 | |
af8ac8f9 | 721 | if (!lsp_bits) |
d62a17ae | 722 | return " none"; |
eb5d44eb | 723 | |
36228974 | 724 | if (buf_size < 2 * 3) |
725 | return " error"; | |
726 | ||
d62a17ae | 727 | /* we only focus on the default metric */ |
f3abc412 | 728 | pos += snprintf(pos, buf_size, "%d/", |
729 | ISIS_MASK_LSP_ATT_BITS(lsp_bits) ? 1 : 0); | |
eb5d44eb | 730 | |
f3abc412 | 731 | pos += snprintf(pos, buf_size, "%d/", |
732 | ISIS_MASK_LSP_PARTITION_BIT(lsp_bits) ? 1 : 0); | |
f390d2c7 | 733 | |
f3abc412 | 734 | snprintf(pos, buf_size, "%d", ISIS_MASK_LSP_OL_BIT(lsp_bits) ? 1 : 0); |
eb5d44eb | 735 | |
36228974 | 736 | return buf; |
eb5d44eb | 737 | } |
738 | ||
739 | /* this function prints the lsp on show isis database */ | |
a2cac12a JG |
740 | void lsp_print_common(struct isis_lsp *lsp, struct vty *vty, struct json_object *json, |
741 | char dynhost, struct isis *isis) | |
742 | { | |
743 | if (json) { | |
744 | return lsp_print_json(lsp, json, dynhost, isis); | |
745 | } else { | |
746 | return lsp_print_vty(lsp, vty, dynhost, isis); | |
747 | } | |
748 | } | |
749 | ||
750 | void lsp_print_json(struct isis_lsp *lsp, struct json_object *json, | |
751 | char dynhost, struct isis *isis) | |
752 | { | |
753 | char LSPid[255]; | |
754 | char age_out[8]; | |
755 | char b[200]; | |
756 | json_object *own_json; | |
757 | char buf[256]; | |
758 | ||
759 | lspid_print(lsp->hdr.lsp_id, LSPid, sizeof(LSPid), dynhost, 1, isis); | |
760 | own_json = json_object_new_object(); | |
761 | json_object_object_add(json, "lsp", own_json); | |
762 | json_object_string_add(own_json, "id", LSPid); | |
763 | json_object_string_add(own_json, "own", lsp->own_lsp ? "*" : " "); | |
764 | json_object_int_add(json, "pdu-len", lsp->hdr.pdu_len); | |
765 | snprintfrr(buf, sizeof(buf), "0x%08x", lsp->hdr.seqno); | |
766 | json_object_string_add(json, "seq-number", buf); | |
767 | snprintfrr(buf, sizeof(buf), "0x%04hx", lsp->hdr.checksum); | |
768 | json_object_string_add(json, "chksum", buf); | |
769 | if (lsp->hdr.rem_lifetime == 0) { | |
770 | snprintf(age_out, sizeof(age_out), "(%d)", lsp->age_out); | |
771 | age_out[7] = '\0'; | |
772 | json_object_string_add(json, "holdtime", age_out); | |
773 | } else { | |
774 | json_object_int_add(json, "holdtime", lsp->hdr.rem_lifetime); | |
775 | } | |
776 | json_object_string_add( | |
777 | json, "att-p-ol", lsp_bits2string(lsp->hdr.lsp_bits, b, sizeof(b))); | |
778 | } | |
779 | ||
780 | void lsp_print_vty(struct isis_lsp *lsp, struct vty *vty, | |
781 | char dynhost, struct isis *isis) | |
eb5d44eb | 782 | { |
0d6fb551 | 783 | char LSPid[255]; |
d62a17ae | 784 | char age_out[8]; |
36228974 | 785 | char b[200]; |
d62a17ae | 786 | |
7533cad7 | 787 | lspid_print(lsp->hdr.lsp_id, LSPid, sizeof(LSPid), dynhost, 1, isis); |
d62a17ae | 788 | vty_out(vty, "%-21s%c ", LSPid, lsp->own_lsp ? '*' : ' '); |
6cde4b45 DL |
789 | vty_out(vty, "%5hu ", lsp->hdr.pdu_len); |
790 | vty_out(vty, "0x%08x ", lsp->hdr.seqno); | |
791 | vty_out(vty, "0x%04hx ", lsp->hdr.checksum); | |
af8ac8f9 | 792 | if (lsp->hdr.rem_lifetime == 0) { |
772270f3 | 793 | snprintf(age_out, sizeof(age_out), "(%d)", lsp->age_out); |
d62a17ae | 794 | age_out[7] = '\0'; |
795 | vty_out(vty, "%7s ", age_out); | |
796 | } else | |
6cde4b45 | 797 | vty_out(vty, " %5hu ", lsp->hdr.rem_lifetime); |
36228974 | 798 | vty_out(vty, "%s\n", lsp_bits2string(lsp->hdr.lsp_bits, b, sizeof(b))); |
c3ae3127 CF |
799 | } |
800 | ||
a2cac12a JG |
801 | void lsp_print_detail(struct isis_lsp *lsp, struct vty *vty, |
802 | struct json_object *json, char dynhost, | |
803 | struct isis *isis) | |
eb5d44eb | 804 | { |
a2cac12a JG |
805 | if (json) { |
806 | lsp_print_json(lsp, json, dynhost, isis); | |
807 | if (lsp->tlvs) { | |
808 | isis_format_tlvs(lsp->tlvs, json); | |
809 | } | |
810 | } else { | |
811 | lsp_print_vty(lsp, vty, dynhost, isis); | |
812 | if (lsp->tlvs) | |
813 | vty_multiline(vty, " ", "%s", | |
814 | isis_format_tlvs(lsp->tlvs, NULL)); | |
815 | vty_out(vty, "\n"); | |
816 | } | |
eb5d44eb | 817 | } |
818 | ||
819 | /* print all the lsps info in the local lspdb */ | |
a2cac12a JG |
820 | int lsp_print_all(struct vty *vty, struct json_object *json, |
821 | struct lspdb_head *head, char detail, char dynhost, | |
822 | struct isis *isis) | |
eb5d44eb | 823 | { |
4bef0ec4 | 824 | struct isis_lsp *lsp; |
d62a17ae | 825 | int lsp_count = 0; |
826 | ||
827 | if (detail == ISIS_UI_LEVEL_BRIEF) { | |
81fddbe7 | 828 | frr_each (lspdb, head, lsp) { |
a2cac12a | 829 | lsp_print_common(lsp, vty, json, dynhost, isis); |
d62a17ae | 830 | lsp_count++; |
831 | } | |
832 | } else if (detail == ISIS_UI_LEVEL_DETAIL) { | |
81fddbe7 | 833 | frr_each (lspdb, head, lsp) { |
a2cac12a | 834 | lsp_print_detail(lsp, vty, json, dynhost, isis); |
d62a17ae | 835 | lsp_count++; |
836 | } | |
837 | } | |
838 | ||
839 | return lsp_count; | |
eb5d44eb | 840 | } |
841 | ||
d7c0a89a | 842 | static uint16_t lsp_rem_lifetime(struct isis_area *area, int level) |
3f045a08 | 843 | { |
d7c0a89a | 844 | uint16_t rem_lifetime; |
3f045a08 | 845 | |
d62a17ae | 846 | /* Add jitter to configured LSP lifetime */ |
847 | rem_lifetime = | |
848 | isis_jitter(area->max_lsp_lifetime[level - 1], MAX_AGE_JITTER); | |
3f045a08 | 849 | |
d62a17ae | 850 | /* No jitter if the max refresh will be less than configure gen interval |
851 | */ | |
852 | /* N.B. this calucation is acceptable since rem_lifetime is in | |
853 | * [332,65535] at | |
854 | * this point */ | |
855 | if (area->lsp_gen_interval[level - 1] > (rem_lifetime - 300)) | |
856 | rem_lifetime = area->max_lsp_lifetime[level - 1]; | |
3f045a08 | 857 | |
d62a17ae | 858 | return rem_lifetime; |
3f045a08 JB |
859 | } |
860 | ||
d7c0a89a | 861 | static uint16_t lsp_refresh_time(struct isis_lsp *lsp, uint16_t rem_lifetime) |
3f045a08 | 862 | { |
d62a17ae | 863 | struct isis_area *area = lsp->area; |
864 | int level = lsp->level; | |
d7c0a89a | 865 | uint16_t refresh_time; |
3f045a08 | 866 | |
d62a17ae | 867 | /* Add jitter to LSP refresh time */ |
868 | refresh_time = | |
869 | isis_jitter(area->lsp_refresh[level - 1], MAX_LSP_GEN_JITTER); | |
3f045a08 | 870 | |
d62a17ae | 871 | /* RFC 4444 : make sure the refresh time is at least less than 300 |
872 | * of the remaining lifetime and more than gen interval */ | |
873 | if (refresh_time <= area->lsp_gen_interval[level - 1] | |
874 | || refresh_time > (rem_lifetime - 300)) | |
875 | refresh_time = rem_lifetime - 300; | |
3f045a08 | 876 | |
d62a17ae | 877 | /* In cornercases, refresh_time might be <= lsp_gen_interval, however |
878 | * we accept this violation to satisfy refresh_time <= rem_lifetime - | |
879 | * 300 */ | |
3f045a08 | 880 | |
d62a17ae | 881 | return refresh_time; |
3f045a08 JB |
882 | } |
883 | ||
d62a17ae | 884 | static void lsp_build_ext_reach_ipv4(struct isis_lsp *lsp, |
af8ac8f9 | 885 | struct isis_area *area) |
f3ccedaa | 886 | { |
af8ac8f9 | 887 | struct route_table *er_table = get_ext_reach(area, AF_INET, lsp->level); |
d62a17ae | 888 | if (!er_table) |
889 | return; | |
890 | ||
af8ac8f9 CF |
891 | for (struct route_node *rn = route_top(er_table); rn; |
892 | rn = route_next(rn)) { | |
d62a17ae | 893 | if (!rn->info) |
894 | continue; | |
895 | ||
af8ac8f9 CF |
896 | struct prefix_ipv4 *ipv4 = (struct prefix_ipv4 *)&rn->p; |
897 | struct isis_ext_info *info = rn->info; | |
f3ccedaa | 898 | |
af8ac8f9 CF |
899 | uint32_t metric = info->metric; |
900 | if (metric > MAX_WIDE_PATH_METRIC) | |
901 | metric = MAX_WIDE_PATH_METRIC; | |
902 | if (area->oldmetric && metric > 0x3f) | |
903 | metric = 0x3f; | |
d62a17ae | 904 | |
af8ac8f9 CF |
905 | if (area->oldmetric) |
906 | isis_tlvs_add_oldstyle_ip_reach(lsp->tlvs, ipv4, | |
907 | metric); | |
26f6acaf RW |
908 | if (area->newmetric) { |
909 | struct sr_prefix_cfg *pcfg = NULL; | |
910 | ||
911 | if (area->srdb.enabled) | |
912 | pcfg = isis_sr_cfg_prefix_find(area, ipv4); | |
913 | ||
914 | isis_tlvs_add_extended_ip_reach(lsp->tlvs, ipv4, metric, | |
915 | true, pcfg); | |
916 | } | |
af8ac8f9 | 917 | } |
c3ae3127 CF |
918 | } |
919 | ||
d62a17ae | 920 | static void lsp_build_ext_reach_ipv6(struct isis_lsp *lsp, |
af8ac8f9 | 921 | struct isis_area *area) |
f3ccedaa | 922 | { |
af8ac8f9 CF |
923 | struct route_table *er_table = |
924 | get_ext_reach(area, AF_INET6, lsp->level); | |
d62a17ae | 925 | if (!er_table) |
926 | return; | |
927 | ||
af8ac8f9 | 928 | for (struct route_node *rn = route_top(er_table); rn; |
d43d2df5 | 929 | rn = srcdest_route_next(rn)) { |
d62a17ae | 930 | if (!rn->info) |
931 | continue; | |
af8ac8f9 | 932 | struct isis_ext_info *info = rn->info; |
d43d2df5 | 933 | struct prefix_ipv6 *p, *src_p; |
1b3f47d0 | 934 | |
d43d2df5 CF |
935 | srcdest_rnode_prefixes(rn, (const struct prefix **)&p, |
936 | (const struct prefix **)&src_p); | |
937 | ||
af8ac8f9 | 938 | uint32_t metric = info->metric; |
d62a17ae | 939 | if (info->metric > MAX_WIDE_PATH_METRIC) |
af8ac8f9 | 940 | metric = MAX_WIDE_PATH_METRIC; |
d43d2df5 CF |
941 | |
942 | if (!src_p || !src_p->prefixlen) { | |
26f6acaf RW |
943 | struct sr_prefix_cfg *pcfg = NULL; |
944 | ||
945 | if (area->srdb.enabled) | |
946 | pcfg = isis_sr_cfg_prefix_find(area, p); | |
947 | ||
d43d2df5 CF |
948 | isis_tlvs_add_ipv6_reach(lsp->tlvs, |
949 | isis_area_ipv6_topology(area), | |
26f6acaf | 950 | p, metric, true, pcfg); |
d43d2df5 CF |
951 | } else if (isis_area_ipv6_dstsrc_enabled(area)) { |
952 | isis_tlvs_add_ipv6_dstsrc_reach(lsp->tlvs, | |
953 | ISIS_MT_IPV6_DSTSRC, | |
954 | p, src_p, metric); | |
955 | } | |
d62a17ae | 956 | } |
f3ccedaa CF |
957 | } |
958 | ||
af8ac8f9 | 959 | static void lsp_build_ext_reach(struct isis_lsp *lsp, struct isis_area *area) |
f3ccedaa | 960 | { |
af8ac8f9 CF |
961 | lsp_build_ext_reach_ipv4(lsp, area); |
962 | lsp_build_ext_reach_ipv6(lsp, area); | |
963 | } | |
964 | ||
965 | static struct isis_lsp *lsp_next_frag(uint8_t frag_num, struct isis_lsp *lsp0, | |
966 | struct isis_area *area, int level) | |
967 | { | |
968 | struct isis_lsp *lsp; | |
969 | uint8_t frag_id[ISIS_SYS_ID_LEN + 2]; | |
970 | ||
971 | memcpy(frag_id, lsp0->hdr.lsp_id, ISIS_SYS_ID_LEN + 1); | |
972 | LSP_FRAGMENT(frag_id) = frag_num; | |
973 | ||
4bef0ec4 | 974 | lsp = lsp_search(&area->lspdb[level - 1], frag_id); |
af8ac8f9 CF |
975 | if (lsp) { |
976 | lsp_clear_data(lsp); | |
0b8b6cab CF |
977 | if (!lsp->lspu.zero_lsp) |
978 | lsp_link_fragment(lsp, lsp0); | |
af8ac8f9 CF |
979 | return lsp; |
980 | } | |
981 | ||
982 | lsp = lsp_new(area, frag_id, lsp0->hdr.rem_lifetime, 0, | |
983 | lsp_bits_generate(level, area->overload_bit, | |
f3abc412 | 984 | area->attached_bit_send, area), |
8f5dbe18 | 985 | 0, lsp0, level); |
af8ac8f9 | 986 | lsp->own_lsp = 1; |
4bef0ec4 | 987 | lsp_insert(&area->lspdb[level - 1], lsp); |
af8ac8f9 | 988 | return lsp; |
f3ccedaa CF |
989 | } |
990 | ||
eb5d44eb | 991 | /* |
d62a17ae | 992 | * Builds the LSP data part. This func creates a new frag whenever |
eb5d44eb | 993 | * area->lsp_frag_threshold is exceeded. |
994 | */ | |
d62a17ae | 995 | static void lsp_build(struct isis_lsp *lsp, struct isis_area *area) |
eb5d44eb | 996 | { |
d62a17ae | 997 | int level = lsp->level; |
af8ac8f9 CF |
998 | struct listnode *node; |
999 | struct isis_lsp *frag; | |
1000 | ||
1001 | lsp_clear_data(lsp); | |
1002 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) | |
1003 | lsp_clear_data(frag); | |
d62a17ae | 1004 | |
af8ac8f9 | 1005 | lsp->tlvs = isis_alloc_tlvs(); |
d62a17ae | 1006 | lsp_debug("ISIS (%s): Constructing local system LSP for level %d", |
1007 | area->area_tag, level); | |
1008 | ||
af8ac8f9 | 1009 | lsp->hdr.lsp_bits = lsp_bits_generate(level, area->overload_bit, |
f3abc412 | 1010 | area->attached_bit_send, area); |
d62a17ae | 1011 | |
af8ac8f9 | 1012 | lsp_add_auth(lsp); |
d62a17ae | 1013 | |
af8ac8f9 | 1014 | isis_tlvs_add_area_addresses(lsp->tlvs, area->area_addrs); |
d62a17ae | 1015 | |
1016 | /* Protocols Supported */ | |
1017 | if (area->ip_circuits > 0 || area->ipv6_circuits > 0) { | |
af8ac8f9 | 1018 | struct nlpids nlpids = {.count = 0}; |
1b3f47d0 | 1019 | |
d62a17ae | 1020 | if (area->ip_circuits > 0) { |
1021 | lsp_debug( | |
1022 | "ISIS (%s): Found IPv4 circuit, adding IPv4 to NLPIDs", | |
1023 | area->area_tag); | |
af8ac8f9 CF |
1024 | nlpids.nlpids[nlpids.count] = NLPID_IP; |
1025 | nlpids.count++; | |
d62a17ae | 1026 | } |
1027 | if (area->ipv6_circuits > 0) { | |
1028 | lsp_debug( | |
1029 | "ISIS (%s): Found IPv6 circuit, adding IPv6 to NLPIDs", | |
1030 | area->area_tag); | |
af8ac8f9 CF |
1031 | nlpids.nlpids[nlpids.count] = NLPID_IPV6; |
1032 | nlpids.count++; | |
d62a17ae | 1033 | } |
af8ac8f9 | 1034 | isis_tlvs_set_protocols_supported(lsp->tlvs, &nlpids); |
d62a17ae | 1035 | } |
1036 | ||
1037 | if (area_is_mt(area)) { | |
1038 | lsp_debug("ISIS (%s): Adding MT router tlv...", area->area_tag); | |
d62a17ae | 1039 | |
1040 | struct isis_area_mt_setting **mt_settings; | |
1041 | unsigned int mt_count; | |
1042 | ||
1043 | mt_settings = area_mt_settings(area, &mt_count); | |
1044 | for (unsigned int i = 0; i < mt_count; i++) { | |
af8ac8f9 CF |
1045 | isis_tlvs_add_mt_router_info( |
1046 | lsp->tlvs, mt_settings[i]->mtid, | |
1047 | mt_settings[i]->overload, false); | |
d62a17ae | 1048 | lsp_debug("ISIS (%s): MT %s", area->area_tag, |
af8ac8f9 | 1049 | isis_mtid2str(mt_settings[i]->mtid)); |
aa4376ec | 1050 | } |
d62a17ae | 1051 | } else { |
1052 | lsp_debug("ISIS (%s): Not adding MT router tlv (disabled)", | |
1053 | area->area_tag); | |
1054 | } | |
1055 | /* Dynamic Hostname */ | |
1056 | if (area->dynhostname) { | |
6b3ee3a0 | 1057 | isis_tlvs_set_dynamic_hostname(lsp->tlvs, cmd_hostname_get()); |
af8ac8f9 | 1058 | lsp_debug("ISIS (%s): Adding dynamic hostname '%s'", |
6b3ee3a0 | 1059 | area->area_tag, cmd_hostname_get()); |
d62a17ae | 1060 | } else { |
1061 | lsp_debug("ISIS (%s): Not adding dynamic hostname (disabled)", | |
1062 | area->area_tag); | |
1063 | } | |
1064 | ||
26f6acaf | 1065 | /* Add Router Capability TLV. */ |
eab88f36 | 1066 | if (area->isis->router_id != 0) { |
26f6acaf RW |
1067 | struct isis_router_cap cap = {}; |
1068 | ||
eab88f36 | 1069 | cap.router_id.s_addr = area->isis->router_id; |
26f6acaf RW |
1070 | |
1071 | /* Add SR Sub-TLVs if SR is enabled. */ | |
1072 | if (area->srdb.enabled) { | |
1073 | struct isis_sr_db *srdb = &area->srdb; | |
1074 | uint32_t range_size; | |
1075 | ||
d8391312 | 1076 | /* SRGB first */ |
26f6acaf RW |
1077 | range_size = srdb->config.srgb_upper_bound |
1078 | - srdb->config.srgb_lower_bound + 1; | |
1079 | cap.srgb.flags = ISIS_SUBTLV_SRGB_FLAG_I | |
1080 | | ISIS_SUBTLV_SRGB_FLAG_V; | |
1081 | cap.srgb.range_size = range_size; | |
1082 | cap.srgb.lower_bound = srdb->config.srgb_lower_bound; | |
d8391312 | 1083 | /* Then Algorithm */ |
26f6acaf RW |
1084 | cap.algo[0] = SR_ALGORITHM_SPF; |
1085 | cap.algo[1] = SR_ALGORITHM_UNSET; | |
d8391312 OD |
1086 | /* SRLB */ |
1087 | cap.srlb.flags = 0; | |
1088 | range_size = srdb->config.srlb_upper_bound | |
1089 | - srdb->config.srlb_lower_bound + 1; | |
1090 | cap.srlb.range_size = range_size; | |
1091 | cap.srlb.lower_bound = srdb->config.srlb_lower_bound; | |
1092 | /* And finally MSD */ | |
26f6acaf | 1093 | cap.msd = srdb->config.msd; |
d9884a75 OD |
1094 | } else { |
1095 | /* Disable SR Algorithm */ | |
1096 | cap.algo[0] = SR_ALGORITHM_UNSET; | |
1097 | cap.algo[1] = SR_ALGORITHM_UNSET; | |
26f6acaf RW |
1098 | } |
1099 | ||
1100 | isis_tlvs_set_router_capability(lsp->tlvs, &cap); | |
1101 | lsp_debug("ISIS (%s): Adding Router Capabilities information", | |
1102 | area->area_tag); | |
1103 | } | |
1104 | ||
1b3f47d0 OD |
1105 | /* IPv4 address and TE router ID TLVs. |
1106 | * In case of the first one we don't follow "C" vendor, | |
1107 | * but "J" vendor behavior - one IPv4 address is put | |
1108 | * into LSP. TE router ID will be the same if MPLS-TE | |
1109 | * is not activate or MPLS-TE router-id not specified | |
1110 | */ | |
eab88f36 K |
1111 | if (area->isis->router_id != 0) { |
1112 | struct in_addr id = {.s_addr = area->isis->router_id}; | |
2dbe669b DA |
1113 | lsp_debug("ISIS (%s): Adding router ID %pI4 as IPv4 tlv.", |
1114 | area->area_tag, &id); | |
af8ac8f9 | 1115 | isis_tlvs_add_ipv4_address(lsp->tlvs, &id); |
d62a17ae | 1116 | |
1b3f47d0 OD |
1117 | /* If new style TLV's are in use, add TE router ID TLV |
1118 | * Check if MPLS-TE is activate and mpls-te router-id set | |
1119 | * otherwise add exactly same data as for IPv4 address | |
1120 | */ | |
d62a17ae | 1121 | if (area->newmetric) { |
1b3f47d0 | 1122 | if (IS_MPLS_TE(area->mta) |
3a6290bd | 1123 | && area->mta->router_id.s_addr != INADDR_ANY) |
1b3f47d0 | 1124 | id.s_addr = area->mta->router_id.s_addr; |
d62a17ae | 1125 | lsp_debug( |
1126 | "ISIS (%s): Adding router ID also as TE router ID tlv.", | |
1127 | area->area_tag); | |
af8ac8f9 | 1128 | isis_tlvs_set_te_router_id(lsp->tlvs, &id); |
aa4376ec | 1129 | } |
d62a17ae | 1130 | } else { |
1131 | lsp_debug("ISIS (%s): Router ID is unset. Not adding tlv.", | |
1132 | area->area_tag); | |
1133 | } | |
1134 | ||
173f8887 OD |
1135 | if (IS_MPLS_TE(area->mta) |
1136 | && !IN6_IS_ADDR_UNSPECIFIED(&area->mta->router_id_ipv6)) { | |
1137 | lsp_debug("ISIS (%s): Adding IPv6 TE Router ID tlv.", | |
1138 | area->area_tag); | |
1139 | isis_tlvs_set_te_router_id_ipv6(lsp->tlvs, | |
1140 | &area->mta->router_id_ipv6); | |
1141 | } | |
1142 | ||
d62a17ae | 1143 | lsp_debug("ISIS (%s): Adding circuit specific information.", |
1144 | area->area_tag); | |
1145 | ||
92ed0cde CF |
1146 | if (fabricd) { |
1147 | lsp_debug( | |
6cde4b45 | 1148 | "ISIS (%s): Adding tier %hhu spine-leaf-extension tlv.", |
92ed0cde CF |
1149 | area->area_tag, fabricd_tier(area)); |
1150 | isis_tlvs_add_spine_leaf(lsp->tlvs, fabricd_tier(area), true, | |
1151 | false, false, false); | |
1152 | } | |
1153 | ||
af8ac8f9 | 1154 | struct isis_circuit *circuit; |
d62a17ae | 1155 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit)) { |
1156 | if (!circuit->interface) | |
1157 | lsp_debug( | |
1158 | "ISIS (%s): Processing %s circuit %p with unknown interface", | |
1159 | area->area_tag, | |
1160 | circuit_type2string(circuit->circ_type), | |
1161 | circuit); | |
1162 | else | |
1163 | lsp_debug("ISIS (%s): Processing %s circuit %s", | |
1164 | area->area_tag, | |
1165 | circuit_type2string(circuit->circ_type), | |
1166 | circuit->interface->name); | |
1167 | ||
1168 | if (circuit->state != C_STATE_UP) { | |
1169 | lsp_debug("ISIS (%s): Circuit is not up, ignoring.", | |
1170 | area->area_tag); | |
1171 | continue; | |
aa4376ec | 1172 | } |
d62a17ae | 1173 | |
3f3608d8 DO |
1174 | if (area->advertise_passive_only && !circuit->is_passive) { |
1175 | lsp_debug( | |
1176 | "ISIS (%s): Circuit is not passive, ignoring.", | |
1177 | area->area_tag); | |
1178 | continue; | |
1179 | } | |
1180 | ||
af8ac8f9 CF |
1181 | uint32_t metric = area->oldmetric |
1182 | ? circuit->metric[level - 1] | |
1183 | : circuit->te_metric[level - 1]; | |
1184 | ||
91a5bbc4 | 1185 | if (circuit->ip_router && circuit->ip_addrs->count > 0) { |
d62a17ae | 1186 | lsp_debug( |
1187 | "ISIS (%s): Circuit has IPv4 active, adding respective TLVs.", | |
1188 | area->area_tag); | |
af8ac8f9 CF |
1189 | struct listnode *ipnode; |
1190 | struct prefix_ipv4 *ipv4; | |
1191 | for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, ipnode, | |
1192 | ipv4)) { | |
1193 | if (area->oldmetric) { | |
d62a17ae | 1194 | lsp_debug( |
2dbe669b DA |
1195 | "ISIS (%s): Adding old-style IP reachability for %pFX", |
1196 | area->area_tag, ipv4); | |
af8ac8f9 CF |
1197 | isis_tlvs_add_oldstyle_ip_reach( |
1198 | lsp->tlvs, ipv4, metric); | |
d62a17ae | 1199 | } |
af8ac8f9 CF |
1200 | |
1201 | if (area->newmetric) { | |
26f6acaf RW |
1202 | struct sr_prefix_cfg *pcfg = NULL; |
1203 | ||
d62a17ae | 1204 | lsp_debug( |
2dbe669b DA |
1205 | "ISIS (%s): Adding te-style IP reachability for %pFX", |
1206 | area->area_tag, ipv4); | |
26f6acaf RW |
1207 | |
1208 | if (area->srdb.enabled) | |
1209 | pcfg = isis_sr_cfg_prefix_find( | |
1210 | area, ipv4); | |
1211 | ||
af8ac8f9 | 1212 | isis_tlvs_add_extended_ip_reach( |
26f6acaf RW |
1213 | lsp->tlvs, ipv4, metric, false, |
1214 | pcfg); | |
d62a17ae | 1215 | } |
1216 | } | |
f390d2c7 | 1217 | } |
d62a17ae | 1218 | |
91a5bbc4 | 1219 | if (circuit->ipv6_router && circuit->ipv6_non_link->count > 0) { |
af8ac8f9 CF |
1220 | struct listnode *ipnode; |
1221 | struct prefix_ipv6 *ipv6; | |
1b3f47d0 | 1222 | |
d62a17ae | 1223 | for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, |
1224 | ipnode, ipv6)) { | |
26f6acaf RW |
1225 | struct sr_prefix_cfg *pcfg = NULL; |
1226 | ||
d62a17ae | 1227 | lsp_debug( |
2dbe669b DA |
1228 | "ISIS (%s): Adding IPv6 reachability for %pFX", |
1229 | area->area_tag, ipv6); | |
26f6acaf RW |
1230 | |
1231 | if (area->srdb.enabled) | |
1232 | pcfg = isis_sr_cfg_prefix_find(area, | |
1233 | ipv6); | |
1234 | ||
af8ac8f9 CF |
1235 | isis_tlvs_add_ipv6_reach( |
1236 | lsp->tlvs, | |
1237 | isis_area_ipv6_topology(area), ipv6, | |
26f6acaf | 1238 | metric, false, pcfg); |
d62a17ae | 1239 | } |
aa4376ec | 1240 | } |
d62a17ae | 1241 | |
1242 | switch (circuit->circ_type) { | |
1243 | case CIRCUIT_T_BROADCAST: | |
1244 | if (level & circuit->is_type) { | |
af8ac8f9 CF |
1245 | uint8_t *ne_id = |
1246 | (level == IS_LEVEL_1) | |
1247 | ? circuit->u.bc.l1_desig_is | |
1248 | : circuit->u.bc.l2_desig_is; | |
1249 | ||
1250 | if (LSP_PSEUDO_ID(ne_id)) { | |
1251 | if (area->oldmetric) { | |
d62a17ae | 1252 | lsp_debug( |
1253 | "ISIS (%s): Adding DIS %s.%02x as old-style neighbor", | |
1254 | area->area_tag, | |
af8ac8f9 CF |
1255 | sysid_print(ne_id), |
1256 | LSP_PSEUDO_ID(ne_id)); | |
1257 | isis_tlvs_add_oldstyle_reach( | |
1258 | lsp->tlvs, ne_id, | |
1259 | metric); | |
d62a17ae | 1260 | } |
1b3f47d0 | 1261 | if (area->newmetric) |
d62a17ae | 1262 | tlvs_add_mt_bcast( |
af8ac8f9 | 1263 | lsp->tlvs, circuit, |
1b3f47d0 | 1264 | level, ne_id, metric); |
d62a17ae | 1265 | } |
1266 | } else { | |
1267 | lsp_debug( | |
1268 | "ISIS (%s): Circuit is not active for current level. Not adding IS neighbors", | |
1269 | area->area_tag); | |
1270 | } | |
1271 | break; | |
af8ac8f9 CF |
1272 | case CIRCUIT_T_P2P: { |
1273 | struct isis_adjacency *nei = circuit->u.p2p.neighbor; | |
44b89511 CF |
1274 | if (nei && nei->adj_state == ISIS_ADJ_UP |
1275 | && (level & nei->circuit_t)) { | |
af8ac8f9 CF |
1276 | uint8_t ne_id[7]; |
1277 | memcpy(ne_id, nei->sysid, ISIS_SYS_ID_LEN); | |
1278 | LSP_PSEUDO_ID(ne_id) = 0; | |
1279 | ||
d62a17ae | 1280 | if (area->oldmetric) { |
d62a17ae | 1281 | lsp_debug( |
1282 | "ISIS (%s): Adding old-style is reach for %s", | |
1283 | area->area_tag, | |
af8ac8f9 CF |
1284 | sysid_print(ne_id)); |
1285 | isis_tlvs_add_oldstyle_reach( | |
1286 | lsp->tlvs, ne_id, metric); | |
d62a17ae | 1287 | } |
1288 | if (area->newmetric) { | |
a191178d CF |
1289 | uint32_t neighbor_metric; |
1290 | if (fabricd_tier(area) == 0) { | |
1291 | neighbor_metric = 0xffe; | |
1292 | } else { | |
1293 | neighbor_metric = metric; | |
1294 | } | |
1295 | ||
af8ac8f9 | 1296 | tlvs_add_mt_p2p(lsp->tlvs, circuit, |
1b3f47d0 | 1297 | ne_id, neighbor_metric); |
d62a17ae | 1298 | } |
1299 | } else { | |
1300 | lsp_debug( | |
1301 | "ISIS (%s): No adjacency for given level on this circuit. Not adding IS neighbors", | |
1302 | area->area_tag); | |
1303 | } | |
af8ac8f9 | 1304 | } break; |
d62a17ae | 1305 | case CIRCUIT_T_LOOPBACK: |
1306 | break; | |
1307 | default: | |
1308 | zlog_warn("lsp_area_create: unknown circuit type"); | |
aa4376ec | 1309 | } |
d62a17ae | 1310 | } |
1311 | ||
af8ac8f9 | 1312 | lsp_build_ext_reach(lsp, area); |
d62a17ae | 1313 | |
af8ac8f9 CF |
1314 | struct isis_tlvs *tlvs = lsp->tlvs; |
1315 | lsp->tlvs = NULL; | |
d62a17ae | 1316 | |
d07067ba | 1317 | lsp_adjust_stream(lsp); |
af8ac8f9 CF |
1318 | lsp_pack_pdu(lsp); |
1319 | size_t tlv_space = STREAM_WRITEABLE(lsp->pdu) - LLC_LEN; | |
1320 | lsp_clear_data(lsp); | |
d62a17ae | 1321 | |
af8ac8f9 CF |
1322 | struct list *fragments = isis_fragment_tlvs(tlvs, tlv_space); |
1323 | if (!fragments) { | |
1324 | zlog_warn("BUG: could not fragment own LSP:"); | |
996c9314 | 1325 | log_multiline(LOG_WARNING, " ", "%s", |
a2cac12a | 1326 | isis_format_tlvs(tlvs, NULL)); |
af8ac8f9 CF |
1327 | isis_free_tlvs(tlvs); |
1328 | return; | |
d62a17ae | 1329 | } |
af8ac8f9 | 1330 | isis_free_tlvs(tlvs); |
d62a17ae | 1331 | |
789c4dfc | 1332 | bool fragment_overflow = false; |
af8ac8f9 CF |
1333 | frag = lsp; |
1334 | for (ALL_LIST_ELEMENTS_RO(fragments, node, tlvs)) { | |
1335 | if (node != listhead(fragments)) { | |
789c4dfc CF |
1336 | if (LSP_FRAGMENT(frag->hdr.lsp_id) == 255) { |
1337 | if (!fragment_overflow) { | |
1338 | fragment_overflow = true; | |
996c9314 LB |
1339 | zlog_warn( |
1340 | "ISIS (%s): Too much information for 256 fragments", | |
1341 | area->area_tag); | |
789c4dfc CF |
1342 | } |
1343 | isis_free_tlvs(tlvs); | |
1344 | continue; | |
1345 | } | |
1346 | ||
af8ac8f9 CF |
1347 | frag = lsp_next_frag(LSP_FRAGMENT(frag->hdr.lsp_id) + 1, |
1348 | lsp, area, level); | |
d07067ba | 1349 | lsp_adjust_stream(frag); |
d62a17ae | 1350 | } |
af8ac8f9 | 1351 | frag->tlvs = tlvs; |
d62a17ae | 1352 | } |
1353 | ||
6a154c88 | 1354 | list_delete(&fragments); |
af8ac8f9 CF |
1355 | lsp_debug("ISIS (%s): LSP construction is complete. Serializing...", |
1356 | area->area_tag); | |
d62a17ae | 1357 | return; |
eb5d44eb | 1358 | } |
eb5d44eb | 1359 | |
1360 | /* | |
3f045a08 | 1361 | * 7.3.7 and 7.3.9 Generation on non-pseudonode LSPs |
eb5d44eb | 1362 | */ |
d62a17ae | 1363 | int lsp_generate(struct isis_area *area, int level) |
f390d2c7 | 1364 | { |
d62a17ae | 1365 | struct isis_lsp *oldlsp, *newlsp; |
d7c0a89a QY |
1366 | uint32_t seq_num = 0; |
1367 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1368 | uint16_t rem_lifetime, refresh_time; | |
450841fe | 1369 | uint32_t overload_time; |
d62a17ae | 1370 | |
1371 | if ((area == NULL) || (area->is_type & level) != level) | |
1372 | return ISIS_ERROR; | |
1373 | ||
3b0e97e1 IL |
1374 | /* Check if config is still being processed */ |
1375 | if (thread_is_scheduled(t_isis_cfg)) | |
1376 | return ISIS_OK; | |
1377 | ||
d62a17ae | 1378 | memset(&lspid, 0, ISIS_SYS_ID_LEN + 2); |
eab88f36 K |
1379 | |
1380 | memcpy(&lspid, area->isis->sysid, ISIS_SYS_ID_LEN); | |
d62a17ae | 1381 | |
450841fe IL |
1382 | /* Check if device should be overloaded on startup */ |
1383 | if (device_startup) { | |
1384 | overload_time = isis_restart_read_overload_time(area); | |
1385 | if (overload_time > 0) { | |
1386 | isis_area_overload_bit_set(area, true); | |
907a2395 DS |
1387 | event_add_timer(master, set_overload_on_start_timer, |
1388 | area, overload_time, | |
1389 | &area->t_overload_on_startup_timer); | |
450841fe IL |
1390 | } |
1391 | device_startup = false; | |
1392 | } | |
1393 | ||
d62a17ae | 1394 | /* only builds the lsp if the area shares the level */ |
4bef0ec4 | 1395 | oldlsp = lsp_search(&area->lspdb[level - 1], lspid); |
d62a17ae | 1396 | if (oldlsp) { |
1397 | /* FIXME: we should actually initiate a purge */ | |
af8ac8f9 | 1398 | seq_num = oldlsp->hdr.seqno; |
4bef0ec4 DL |
1399 | lsp_search_and_destroy(&area->lspdb[level - 1], |
1400 | oldlsp->hdr.lsp_id); | |
d62a17ae | 1401 | } |
1402 | rem_lifetime = lsp_rem_lifetime(area, level); | |
f3abc412 | 1403 | newlsp = lsp_new(area, lspid, rem_lifetime, seq_num, |
1404 | lsp_bits_generate(area->is_type, area->overload_bit, | |
1405 | area->attached_bit_send, area), | |
1406 | 0, NULL, level); | |
d62a17ae | 1407 | newlsp->area = area; |
1408 | newlsp->own_lsp = 1; | |
1409 | ||
4bef0ec4 | 1410 | lsp_insert(&area->lspdb[level - 1], newlsp); |
d62a17ae | 1411 | /* build_lsp_data (newlsp, area); */ |
1412 | lsp_build(newlsp, area); | |
1413 | /* time to calculate our checksum */ | |
af8ac8f9 | 1414 | lsp_seqno_update(newlsp); |
d62a17ae | 1415 | newlsp->last_generated = time(NULL); |
9b39405f | 1416 | lsp_flood(newlsp, NULL); |
062f4d36 | 1417 | area->lsp_gen_count[level - 1]++; |
d62a17ae | 1418 | |
1419 | refresh_time = lsp_refresh_time(newlsp, rem_lifetime); | |
1420 | ||
fa935aa7 | 1421 | THREAD_OFF(area->t_lsp_refresh[level - 1]); |
d62a17ae | 1422 | area->lsp_regenerate_pending[level - 1] = 0; |
907a2395 DS |
1423 | event_add_timer(master, lsp_refresh, &area->lsp_refresh_arg[level - 1], |
1424 | refresh_time, &area->t_lsp_refresh[level - 1]); | |
d62a17ae | 1425 | |
e740f9c1 | 1426 | if (IS_DEBUG_UPDATE_PACKETS) { |
6cde4b45 | 1427 | zlog_debug("ISIS-Upd (%s): Building L%d LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus refresh %hus", |
af8ac8f9 CF |
1428 | area->area_tag, level, |
1429 | rawlspid_print(newlsp->hdr.lsp_id), | |
1430 | newlsp->hdr.pdu_len, newlsp->hdr.seqno, | |
1431 | newlsp->hdr.checksum, newlsp->hdr.rem_lifetime, | |
1432 | refresh_time); | |
d62a17ae | 1433 | } |
1434 | sched_debug( | |
1435 | "ISIS (%s): Built L%d LSP. Set triggered regenerate to non-pending.", | |
1436 | area->area_tag, level); | |
1437 | ||
998011fa EDP |
1438 | #ifndef FABRICD |
1439 | /* send northbound notification */ | |
1ee746d9 | 1440 | isis_notif_lsp_gen(area, newlsp->hdr.lsp_id, newlsp->hdr.seqno, |
1441 | newlsp->last_generated); | |
998011fa EDP |
1442 | #endif /* ifndef FABRICD */ |
1443 | ||
d62a17ae | 1444 | return ISIS_OK; |
eb5d44eb | 1445 | } |
1446 | ||
1447 | /* | |
9b39405f | 1448 | * Search own LSPs, update holding time and flood |
eb5d44eb | 1449 | */ |
d62a17ae | 1450 | static int lsp_regenerate(struct isis_area *area, int level) |
eb5d44eb | 1451 | { |
4bef0ec4 | 1452 | struct lspdb_head *head; |
d62a17ae | 1453 | struct isis_lsp *lsp, *frag; |
1454 | struct listnode *node; | |
d7c0a89a QY |
1455 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; |
1456 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1457 | |
1458 | if ((area == NULL) || (area->is_type & level) != level) | |
1459 | return ISIS_ERROR; | |
1460 | ||
4bef0ec4 | 1461 | head = &area->lspdb[level - 1]; |
d62a17ae | 1462 | memset(lspid, 0, ISIS_SYS_ID_LEN + 2); |
eab88f36 | 1463 | memcpy(lspid, area->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1464 | |
4bef0ec4 | 1465 | lsp = lsp_search(head, lspid); |
d62a17ae | 1466 | |
1467 | if (!lsp) { | |
450971aa | 1468 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 QY |
1469 | "ISIS-Upd (%s): lsp_regenerate: no L%d LSP found!", |
1470 | area->area_tag, level); | |
d62a17ae | 1471 | return ISIS_ERROR; |
1472 | } | |
1473 | ||
1474 | lsp_clear_data(lsp); | |
1475 | lsp_build(lsp, area); | |
d62a17ae | 1476 | rem_lifetime = lsp_rem_lifetime(area, level); |
af8ac8f9 | 1477 | lsp->hdr.rem_lifetime = rem_lifetime; |
d62a17ae | 1478 | lsp->last_generated = time(NULL); |
9b39405f | 1479 | lsp_flood(lsp, NULL); |
062f4d36 | 1480 | area->lsp_gen_count[level - 1]++; |
d62a17ae | 1481 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { |
8f27aa27 CF |
1482 | if (!frag->tlvs) { |
1483 | /* Updating and flooding should only affect fragments | |
1484 | * carrying data | |
1485 | */ | |
1486 | continue; | |
1487 | } | |
1488 | ||
f3abc412 | 1489 | frag->hdr.lsp_bits = |
1490 | lsp_bits_generate(level, area->overload_bit, | |
1491 | area->attached_bit_send, area); | |
d62a17ae | 1492 | /* Set the lifetime values of all the fragments to the same |
1493 | * value, | |
1494 | * so that no fragment expires before the lsp is refreshed. | |
1495 | */ | |
af8ac8f9 | 1496 | frag->hdr.rem_lifetime = rem_lifetime; |
0b8b6cab | 1497 | frag->age_out = ZERO_AGE_LIFETIME; |
9b39405f | 1498 | lsp_flood(frag, NULL); |
d62a17ae | 1499 | } |
af8ac8f9 | 1500 | lsp_seqno_update(lsp); |
d62a17ae | 1501 | |
1502 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
907a2395 DS |
1503 | event_add_timer(master, lsp_refresh, &area->lsp_refresh_arg[level - 1], |
1504 | refresh_time, &area->t_lsp_refresh[level - 1]); | |
d62a17ae | 1505 | area->lsp_regenerate_pending[level - 1] = 0; |
1506 | ||
e740f9c1 | 1507 | if (IS_DEBUG_UPDATE_PACKETS) { |
d62a17ae | 1508 | zlog_debug( |
6cde4b45 | 1509 | "ISIS-Upd (%s): Refreshed our L%d LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus refresh %hus", |
af8ac8f9 CF |
1510 | area->area_tag, level, rawlspid_print(lsp->hdr.lsp_id), |
1511 | lsp->hdr.pdu_len, lsp->hdr.seqno, lsp->hdr.checksum, | |
1512 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1513 | } |
1514 | sched_debug( | |
1515 | "ISIS (%s): Rebuilt L%d LSP. Set triggered regenerate to non-pending.", | |
1516 | area->area_tag, level); | |
1517 | ||
1518 | return ISIS_OK; | |
eb5d44eb | 1519 | } |
1520 | ||
eb5d44eb | 1521 | /* |
3f045a08 | 1522 | * Something has changed or periodic refresh -> regenerate LSP |
eb5d44eb | 1523 | */ |
e6685141 | 1524 | static void lsp_refresh(struct event *thread) |
eb5d44eb | 1525 | { |
9196731f | 1526 | struct lsp_refresh_arg *arg = THREAD_ARG(thread); |
d70f99e1 | 1527 | |
9196731f | 1528 | assert(arg); |
eb5d44eb | 1529 | |
9196731f | 1530 | struct isis_area *area = arg->area; |
eb5d44eb | 1531 | |
d62a17ae | 1532 | assert(area); |
f390d2c7 | 1533 | |
9196731f | 1534 | int level = arg->level; |
f390d2c7 | 1535 | |
9196731f CF |
1536 | area->t_lsp_refresh[level - 1] = NULL; |
1537 | area->lsp_regenerate_pending[level - 1] = 0; | |
1538 | ||
1539 | if ((area->is_type & level) == 0) | |
cc9f21da | 1540 | return; |
3f045a08 | 1541 | |
690497fb G |
1542 | /* |
1543 | * Throttle regeneration of LSPs (but not when BFD signalled a 'down' | |
1544 | * message) | |
1545 | */ | |
1546 | if (monotime_since(&area->last_lsp_refresh_event[level - 1], NULL) | |
1547 | < 100000L | |
1548 | && !(area->bfd_force_spf_refresh)) { | |
f93025e1 CF |
1549 | sched_debug("ISIS (%s): Still unstable, postpone LSP L%d refresh", |
1550 | area->area_tag, level); | |
1551 | _lsp_regenerate_schedule(area, level, 0, false, | |
1552 | __func__, __FILE__, __LINE__); | |
cc9f21da | 1553 | return; |
f93025e1 CF |
1554 | } |
1555 | ||
d62a17ae | 1556 | sched_debug( |
9196731f CF |
1557 | "ISIS (%s): LSP L%d refresh timer expired. Refreshing LSP...", |
1558 | area->area_tag, level); | |
cc9f21da | 1559 | lsp_regenerate(area, level); |
eb5d44eb | 1560 | } |
1561 | ||
691f3e76 | 1562 | int _lsp_regenerate_schedule(struct isis_area *area, int level, |
f93025e1 CF |
1563 | int all_pseudo, bool postpone, |
1564 | const char *func, const char *file, | |
1565 | int line) | |
eb5d44eb | 1566 | { |
d62a17ae | 1567 | struct isis_lsp *lsp; |
d7c0a89a | 1568 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1569 | time_t now, diff; |
1570 | long timeout; | |
1571 | struct listnode *cnode; | |
1572 | struct isis_circuit *circuit; | |
1573 | int lvl; | |
1574 | ||
1575 | if (area == NULL) | |
1576 | return ISIS_ERROR; | |
1577 | ||
1578 | sched_debug( | |
3efd0893 | 1579 | "ISIS (%s): Scheduling regeneration of %s LSPs, %sincluding PSNs Caller: %s %s:%d", |
d62a17ae | 1580 | area->area_tag, circuit_t2string(level), |
691f3e76 CF |
1581 | all_pseudo ? "" : "not ", |
1582 | func, file, line); | |
d62a17ae | 1583 | |
eab88f36 | 1584 | memcpy(id, area->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1585 | LSP_PSEUDO_ID(id) = LSP_FRAGMENT(id) = 0; |
1586 | now = time(NULL); | |
1587 | ||
1588 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1589 | if (!((level & lvl) && (area->is_type & lvl))) | |
1590 | continue; | |
1591 | ||
f93025e1 CF |
1592 | if (postpone) { |
1593 | monotime(&area->last_lsp_refresh_event[lvl - 1]); | |
1594 | } | |
1595 | ||
d62a17ae | 1596 | sched_debug( |
1597 | "ISIS (%s): Checking whether L%d needs to be scheduled", | |
1598 | area->area_tag, lvl); | |
1599 | ||
690497fb G |
1600 | if (area->lsp_regenerate_pending[lvl - 1] |
1601 | && !(area->bfd_signalled_down)) { | |
1602 | /* | |
1603 | * Note: in case of a BFD 'down' message the refresh is | |
1604 | * scheduled once again just to be sure | |
1605 | */ | |
4f830a07 | 1606 | struct timeval remain = event_timer_remain( |
d62a17ae | 1607 | area->t_lsp_refresh[lvl - 1]); |
1608 | sched_debug( | |
3efd0893 | 1609 | "ISIS (%s): Regeneration is already pending, nothing todo. (Due in %lld.%03lld seconds)", |
d62a17ae | 1610 | area->area_tag, (long long)remain.tv_sec, |
1611 | (long long)remain.tv_usec / 1000); | |
1612 | continue; | |
1613 | } | |
1614 | ||
4bef0ec4 | 1615 | lsp = lsp_search(&area->lspdb[lvl - 1], id); |
d62a17ae | 1616 | if (!lsp) { |
1617 | sched_debug( | |
1618 | "ISIS (%s): We do not have any LSPs to regenerate, nothing todo.", | |
1619 | area->area_tag); | |
1620 | continue; | |
1621 | } | |
1622 | ||
1623 | /* | |
1624 | * Throttle avoidance | |
1625 | */ | |
1626 | sched_debug( | |
1627 | "ISIS (%s): Will schedule regen timer. Last run was: %lld, Now is: %lld", | |
1628 | area->area_tag, (long long)lsp->last_generated, | |
1629 | (long long)now); | |
fa935aa7 | 1630 | THREAD_OFF(area->t_lsp_refresh[lvl - 1]); |
d62a17ae | 1631 | diff = now - lsp->last_generated; |
690497fb G |
1632 | if (diff < area->lsp_gen_interval[lvl - 1] |
1633 | && !(area->bfd_signalled_down)) { | |
d62a17ae | 1634 | timeout = |
1635 | 1000 * (area->lsp_gen_interval[lvl - 1] - diff); | |
1636 | sched_debug( | |
1637 | "ISIS (%s): Scheduling in %ld ms to match configured lsp_gen_interval", | |
1638 | area->area_tag, timeout); | |
1639 | } else { | |
1640 | /* | |
690497fb | 1641 | * Schedule LSP refresh ASAP |
d62a17ae | 1642 | */ |
690497fb G |
1643 | if (area->bfd_signalled_down) { |
1644 | sched_debug( | |
ec7b1425 | 1645 | "ISIS (%s): Scheduling immediately due to BFD 'down' message.", |
690497fb G |
1646 | area->area_tag); |
1647 | area->bfd_signalled_down = false; | |
1648 | area->bfd_force_spf_refresh = true; | |
d2232b3e | 1649 | timeout = 0; |
690497fb | 1650 | } else { |
d2232b3e EDP |
1651 | int64_t time_since_last = monotime_since( |
1652 | &area->last_lsp_refresh_event[lvl - 1], | |
1653 | NULL); | |
1654 | timeout = time_since_last < 100000L | |
1655 | ? (100000L - time_since_last)/1000 | |
1656 | : 0; | |
1657 | if (timeout > 0) | |
1658 | sched_debug( | |
1659 | "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution in %ld ms due to the instability timer.", | |
1660 | area->area_tag, timeout); | |
1661 | else | |
1662 | sched_debug( | |
1663 | "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution now.", | |
1664 | area->area_tag); | |
690497fb | 1665 | } |
d62a17ae | 1666 | } |
1667 | ||
1668 | area->lsp_regenerate_pending[lvl - 1] = 1; | |
907a2395 DS |
1669 | event_add_timer_msec(master, lsp_refresh, |
1670 | &area->lsp_refresh_arg[lvl - 1], timeout, | |
1671 | &area->t_lsp_refresh[lvl - 1]); | |
d62a17ae | 1672 | } |
1673 | ||
1674 | if (all_pseudo) { | |
1675 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, cnode, circuit)) | |
1676 | lsp_regenerate_schedule_pseudo(circuit, level); | |
1677 | } | |
1678 | ||
1679 | return ISIS_OK; | |
eb5d44eb | 1680 | } |
1681 | ||
1682 | /* | |
1683 | * Funcs for pseudonode LSPs | |
1684 | */ | |
1685 | ||
1686 | /* | |
d62a17ae | 1687 | * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs |
eb5d44eb | 1688 | */ |
d62a17ae | 1689 | static void lsp_build_pseudo(struct isis_lsp *lsp, struct isis_circuit *circuit, |
1690 | int level) | |
eb5d44eb | 1691 | { |
d62a17ae | 1692 | struct isis_adjacency *adj; |
d62a17ae | 1693 | struct list *adj_list; |
1694 | struct listnode *node; | |
1695 | struct isis_area *area = circuit->area; | |
173f8887 | 1696 | uint16_t mtid; |
d62a17ae | 1697 | |
af8ac8f9 CF |
1698 | lsp_clear_data(lsp); |
1699 | lsp->tlvs = isis_alloc_tlvs(); | |
d62a17ae | 1700 | lsp_debug( |
1701 | "ISIS (%s): Constructing pseudo LSP %s for interface %s level %d", | |
af8ac8f9 | 1702 | area->area_tag, rawlspid_print(lsp->hdr.lsp_id), |
d62a17ae | 1703 | circuit->interface->name, level); |
1704 | ||
1705 | lsp->level = level; | |
1706 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
f3abc412 | 1707 | lsp->hdr.lsp_bits = lsp_bits_generate( |
1708 | level, 0, circuit->area->attached_bit_send, area); | |
d62a17ae | 1709 | |
1710 | /* | |
1711 | * add self to IS neighbours | |
1712 | */ | |
af8ac8f9 CF |
1713 | uint8_t ne_id[ISIS_SYS_ID_LEN + 1]; |
1714 | ||
eab88f36 | 1715 | memcpy(ne_id, area->isis->sysid, ISIS_SYS_ID_LEN); |
af8ac8f9 | 1716 | LSP_PSEUDO_ID(ne_id) = 0; |
d62a17ae | 1717 | |
af8ac8f9 CF |
1718 | if (circuit->area->oldmetric) { |
1719 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
d62a17ae | 1720 | lsp_debug( |
1721 | "ISIS (%s): Adding %s.%02x as old-style neighbor (self)", | |
af8ac8f9 CF |
1722 | area->area_tag, sysid_print(ne_id), |
1723 | LSP_PSEUDO_ID(ne_id)); | |
d62a17ae | 1724 | } |
1725 | if (circuit->area->newmetric) { | |
173f8887 OD |
1726 | if (area_is_mt(circuit->area)) |
1727 | mtid = ISIS_MT_IPV4_UNICAST; | |
1728 | else | |
1729 | mtid = ISIS_MT_DISABLE; | |
1730 | isis_tlvs_add_extended_reach(lsp->tlvs, mtid, ne_id, 0, NULL); | |
d62a17ae | 1731 | lsp_debug( |
1732 | "ISIS (%s): Adding %s.%02x as te-style neighbor (self)", | |
af8ac8f9 CF |
1733 | area->area_tag, sysid_print(ne_id), |
1734 | LSP_PSEUDO_ID(ne_id)); | |
d62a17ae | 1735 | } |
1736 | ||
1737 | adj_list = list_new(); | |
1738 | isis_adj_build_up_list(circuit->u.bc.adjdb[level - 1], adj_list); | |
1739 | ||
1740 | for (ALL_LIST_ELEMENTS_RO(adj_list, node, adj)) { | |
af8ac8f9 | 1741 | if (!(adj->level & level)) { |
d62a17ae | 1742 | lsp_debug( |
1743 | "ISIS (%s): Ignoring neighbor %s, level does not intersect", | |
1744 | area->area_tag, sysid_print(adj->sysid)); | |
af8ac8f9 | 1745 | continue; |
f390d2c7 | 1746 | } |
d62a17ae | 1747 | |
af8ac8f9 CF |
1748 | if (!(level == IS_LEVEL_1 |
1749 | && adj->sys_type == ISIS_SYSTYPE_L1_IS) | |
1750 | && !(level == IS_LEVEL_1 | |
1751 | && adj->sys_type == ISIS_SYSTYPE_L2_IS | |
1752 | && adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
1753 | && !(level == IS_LEVEL_2 | |
1754 | && adj->sys_type == ISIS_SYSTYPE_L2_IS)) { | |
1755 | lsp_debug( | |
1756 | "ISIS (%s): Ignoring neighbor %s, level does not match", | |
1757 | area->area_tag, sysid_print(adj->sysid)); | |
1758 | continue; | |
1759 | } | |
d62a17ae | 1760 | |
af8ac8f9 CF |
1761 | memcpy(ne_id, adj->sysid, ISIS_SYS_ID_LEN); |
1762 | if (circuit->area->oldmetric) { | |
1763 | isis_tlvs_add_oldstyle_reach(lsp->tlvs, ne_id, 0); | |
1764 | lsp_debug( | |
1765 | "ISIS (%s): Adding %s.%02x as old-style neighbor (peer)", | |
1766 | area->area_tag, sysid_print(ne_id), | |
1767 | LSP_PSEUDO_ID(ne_id)); | |
1768 | } | |
1769 | if (circuit->area->newmetric) { | |
1770 | isis_tlvs_add_extended_reach(lsp->tlvs, | |
1771 | ISIS_MT_IPV4_UNICAST, | |
d607c409 | 1772 | ne_id, 0, NULL); |
af8ac8f9 CF |
1773 | lsp_debug( |
1774 | "ISIS (%s): Adding %s.%02x as te-style neighbor (peer)", | |
1775 | area->area_tag, sysid_print(ne_id), | |
1776 | LSP_PSEUDO_ID(ne_id)); | |
1777 | } | |
1778 | } | |
6a154c88 | 1779 | list_delete(&adj_list); |
d62a17ae | 1780 | return; |
eb5d44eb | 1781 | } |
1782 | ||
d62a17ae | 1783 | int lsp_generate_pseudo(struct isis_circuit *circuit, int level) |
3f045a08 | 1784 | { |
4bef0ec4 | 1785 | struct lspdb_head *head = &circuit->area->lspdb[level - 1]; |
d62a17ae | 1786 | struct isis_lsp *lsp; |
d7c0a89a QY |
1787 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
1788 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1789 | |
1790 | if ((circuit->is_type & level) != level | |
1791 | || (circuit->state != C_STATE_UP) | |
1792 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1793 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1794 | return ISIS_ERROR; | |
1795 | ||
99e5d4af | 1796 | memcpy(lsp_id, circuit->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1797 | LSP_FRAGMENT(lsp_id) = 0; |
1798 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; | |
1799 | ||
1800 | /* | |
1801 | * If for some reason have a pseudo LSP in the db already -> regenerate | |
1802 | */ | |
4bef0ec4 | 1803 | if (lsp_search(head, lsp_id)) |
d62a17ae | 1804 | return lsp_regenerate_schedule_pseudo(circuit, level); |
1805 | ||
1806 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); | |
1807 | /* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */ | |
1808 | lsp = lsp_new(circuit->area, lsp_id, rem_lifetime, 1, | |
f3abc412 | 1809 | lsp_bits_generate(circuit->area->is_type, 0, |
1810 | circuit->area->attached_bit_send, | |
1811 | circuit->area), | |
1812 | 0, NULL, level); | |
d62a17ae | 1813 | lsp->area = circuit->area; |
1814 | ||
1815 | lsp_build_pseudo(lsp, circuit, level); | |
af8ac8f9 | 1816 | lsp_pack_pdu(lsp); |
d62a17ae | 1817 | lsp->own_lsp = 1; |
4bef0ec4 | 1818 | lsp_insert(head, lsp); |
9b39405f | 1819 | lsp_flood(lsp, NULL); |
d62a17ae | 1820 | |
1821 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
fa935aa7 | 1822 | THREAD_OFF(circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); |
d62a17ae | 1823 | circuit->lsp_regenerate_pending[level - 1] = 0; |
1824 | if (level == IS_LEVEL_1) | |
907a2395 DS |
1825 | event_add_timer(master, lsp_l1_refresh_pseudo, circuit, |
1826 | refresh_time, | |
1827 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
d62a17ae | 1828 | else if (level == IS_LEVEL_2) |
907a2395 DS |
1829 | event_add_timer(master, lsp_l2_refresh_pseudo, circuit, |
1830 | refresh_time, | |
1831 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
d62a17ae | 1832 | |
e740f9c1 | 1833 | if (IS_DEBUG_UPDATE_PACKETS) { |
d62a17ae | 1834 | zlog_debug( |
6cde4b45 | 1835 | "ISIS-Upd (%s): Built L%d Pseudo LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus, refresh %hus", |
d62a17ae | 1836 | circuit->area->area_tag, level, |
af8ac8f9 CF |
1837 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len, |
1838 | lsp->hdr.seqno, lsp->hdr.checksum, | |
1839 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1840 | } |
1841 | ||
1842 | return ISIS_OK; | |
3f045a08 JB |
1843 | } |
1844 | ||
d62a17ae | 1845 | static int lsp_regenerate_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1846 | { |
4bef0ec4 | 1847 | struct lspdb_head *head = &circuit->area->lspdb[level - 1]; |
d62a17ae | 1848 | struct isis_lsp *lsp; |
d7c0a89a QY |
1849 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
1850 | uint16_t rem_lifetime, refresh_time; | |
d62a17ae | 1851 | |
1852 | if ((circuit->is_type & level) != level | |
1853 | || (circuit->state != C_STATE_UP) | |
1854 | || (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1855 | || (circuit->u.bc.is_dr[level - 1] == 0)) | |
1856 | return ISIS_ERROR; | |
1857 | ||
99e5d4af | 1858 | memcpy(lsp_id, circuit->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1859 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; |
1860 | LSP_FRAGMENT(lsp_id) = 0; | |
1861 | ||
4bef0ec4 | 1862 | lsp = lsp_search(head, lsp_id); |
d62a17ae | 1863 | |
1864 | if (!lsp) { | |
450971aa | 1865 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 QY |
1866 | "lsp_regenerate_pseudo: no l%d LSP %s found!", level, |
1867 | rawlspid_print(lsp_id)); | |
d62a17ae | 1868 | return ISIS_ERROR; |
1869 | } | |
d62a17ae | 1870 | |
d62a17ae | 1871 | rem_lifetime = lsp_rem_lifetime(circuit->area, level); |
af8ac8f9 CF |
1872 | lsp->hdr.rem_lifetime = rem_lifetime; |
1873 | lsp_build_pseudo(lsp, circuit, level); | |
1874 | lsp_inc_seqno(lsp, 0); | |
d62a17ae | 1875 | lsp->last_generated = time(NULL); |
9b39405f | 1876 | lsp_flood(lsp, NULL); |
d62a17ae | 1877 | |
1878 | refresh_time = lsp_refresh_time(lsp, rem_lifetime); | |
1879 | if (level == IS_LEVEL_1) | |
907a2395 DS |
1880 | event_add_timer(master, lsp_l1_refresh_pseudo, circuit, |
1881 | refresh_time, | |
1882 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
d62a17ae | 1883 | else if (level == IS_LEVEL_2) |
907a2395 DS |
1884 | event_add_timer(master, lsp_l2_refresh_pseudo, circuit, |
1885 | refresh_time, | |
1886 | &circuit->u.bc.t_refresh_pseudo_lsp[level - 1]); | |
d62a17ae | 1887 | |
e740f9c1 | 1888 | if (IS_DEBUG_UPDATE_PACKETS) { |
d62a17ae | 1889 | zlog_debug( |
6cde4b45 | 1890 | "ISIS-Upd (%s): Refreshed L%d Pseudo LSP %s, len %hu, seq 0x%08x, cksum 0x%04hx, lifetime %hus, refresh %hus", |
d62a17ae | 1891 | circuit->area->area_tag, level, |
af8ac8f9 CF |
1892 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.pdu_len, |
1893 | lsp->hdr.seqno, lsp->hdr.checksum, | |
1894 | lsp->hdr.rem_lifetime, refresh_time); | |
d62a17ae | 1895 | } |
1896 | ||
1897 | return ISIS_OK; | |
eb5d44eb | 1898 | } |
1899 | ||
3f045a08 JB |
1900 | /* |
1901 | * Something has changed or periodic refresh -> regenerate pseudo LSP | |
1902 | */ | |
e6685141 | 1903 | static void lsp_l1_refresh_pseudo(struct event *thread) |
eb5d44eb | 1904 | { |
d62a17ae | 1905 | struct isis_circuit *circuit; |
d7c0a89a | 1906 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
eb5d44eb | 1907 | |
d62a17ae | 1908 | circuit = THREAD_ARG(thread); |
f390d2c7 | 1909 | |
d62a17ae | 1910 | circuit->u.bc.t_refresh_pseudo_lsp[0] = NULL; |
1911 | circuit->lsp_regenerate_pending[0] = 0; | |
13c48f72 | 1912 | |
d62a17ae | 1913 | if ((circuit->u.bc.is_dr[0] == 0) |
1914 | || (circuit->is_type & IS_LEVEL_1) == 0) { | |
99e5d4af | 1915 | memcpy(id, circuit->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1916 | LSP_PSEUDO_ID(id) = circuit->circuit_id; |
1917 | LSP_FRAGMENT(id) = 0; | |
1918 | lsp_purge_pseudo(id, circuit, IS_LEVEL_1); | |
cc9f21da | 1919 | return; |
d62a17ae | 1920 | } |
eb5d44eb | 1921 | |
cc9f21da | 1922 | lsp_regenerate_pseudo(circuit, IS_LEVEL_1); |
eb5d44eb | 1923 | } |
1924 | ||
e6685141 | 1925 | static void lsp_l2_refresh_pseudo(struct event *thread) |
eb5d44eb | 1926 | { |
d62a17ae | 1927 | struct isis_circuit *circuit; |
d7c0a89a | 1928 | uint8_t id[ISIS_SYS_ID_LEN + 2]; |
f390d2c7 | 1929 | |
d62a17ae | 1930 | circuit = THREAD_ARG(thread); |
f390d2c7 | 1931 | |
d62a17ae | 1932 | circuit->u.bc.t_refresh_pseudo_lsp[1] = NULL; |
1933 | circuit->lsp_regenerate_pending[1] = 0; | |
13c48f72 | 1934 | |
d62a17ae | 1935 | if ((circuit->u.bc.is_dr[1] == 0) |
1936 | || (circuit->is_type & IS_LEVEL_2) == 0) { | |
99e5d4af | 1937 | memcpy(id, circuit->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1938 | LSP_PSEUDO_ID(id) = circuit->circuit_id; |
1939 | LSP_FRAGMENT(id) = 0; | |
1940 | lsp_purge_pseudo(id, circuit, IS_LEVEL_2); | |
cc9f21da | 1941 | return; |
d62a17ae | 1942 | } |
eb5d44eb | 1943 | |
cc9f21da | 1944 | lsp_regenerate_pseudo(circuit, IS_LEVEL_2); |
eb5d44eb | 1945 | } |
1946 | ||
d62a17ae | 1947 | int lsp_regenerate_schedule_pseudo(struct isis_circuit *circuit, int level) |
eb5d44eb | 1948 | { |
d62a17ae | 1949 | struct isis_lsp *lsp; |
d7c0a89a | 1950 | uint8_t lsp_id[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1951 | time_t now, diff; |
1952 | long timeout; | |
1953 | int lvl; | |
1954 | struct isis_area *area = circuit->area; | |
1955 | ||
1956 | if (circuit->circ_type != CIRCUIT_T_BROADCAST | |
1957 | || circuit->state != C_STATE_UP) | |
1958 | return ISIS_OK; | |
1959 | ||
1960 | sched_debug( | |
1961 | "ISIS (%s): Scheduling regeneration of %s pseudo LSP for interface %s", | |
1962 | area->area_tag, circuit_t2string(level), | |
1963 | circuit->interface->name); | |
1964 | ||
eab88f36 | 1965 | memcpy(lsp_id, area->isis->sysid, ISIS_SYS_ID_LEN); |
d62a17ae | 1966 | LSP_PSEUDO_ID(lsp_id) = circuit->circuit_id; |
1967 | LSP_FRAGMENT(lsp_id) = 0; | |
1968 | now = time(NULL); | |
1969 | ||
1970 | for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++) { | |
1971 | sched_debug( | |
1972 | "ISIS (%s): Checking whether L%d pseudo LSP needs to be scheduled", | |
1973 | area->area_tag, lvl); | |
1974 | ||
1975 | if (!((level & lvl) && (circuit->is_type & lvl))) { | |
1976 | sched_debug("ISIS (%s): Level is not active on circuit", | |
1977 | area->area_tag); | |
1978 | continue; | |
1979 | } | |
1980 | ||
1981 | if (circuit->u.bc.is_dr[lvl - 1] == 0) { | |
1982 | sched_debug( | |
1983 | "ISIS (%s): This IS is not DR, nothing to do.", | |
1984 | area->area_tag); | |
1985 | continue; | |
1986 | } | |
1987 | ||
1988 | if (circuit->lsp_regenerate_pending[lvl - 1]) { | |
4f830a07 | 1989 | struct timeval remain = event_timer_remain( |
d62a17ae | 1990 | circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); |
1991 | sched_debug( | |
3efd0893 | 1992 | "ISIS (%s): Regenerate is already pending, nothing todo. (Due in %lld.%03lld seconds)", |
d62a17ae | 1993 | area->area_tag, (long long)remain.tv_sec, |
1994 | (long long)remain.tv_usec / 1000); | |
1995 | continue; | |
1996 | } | |
1997 | ||
4bef0ec4 | 1998 | lsp = lsp_search(&circuit->area->lspdb[lvl - 1], lsp_id); |
d62a17ae | 1999 | if (!lsp) { |
2000 | sched_debug( | |
2001 | "ISIS (%s): Pseudonode LSP does not exist yet, nothing to regenerate.", | |
2002 | area->area_tag); | |
2003 | continue; | |
2004 | } | |
2005 | ||
2006 | /* | |
2007 | * Throttle avoidance | |
2008 | */ | |
2009 | sched_debug( | |
2010 | "ISIS (%s): Will schedule PSN regen timer. Last run was: %lld, Now is: %lld", | |
2011 | area->area_tag, (long long)lsp->last_generated, | |
2012 | (long long)now); | |
fa935aa7 | 2013 | THREAD_OFF(circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); |
d62a17ae | 2014 | diff = now - lsp->last_generated; |
2015 | if (diff < circuit->area->lsp_gen_interval[lvl - 1]) { | |
9d303b37 DL |
2016 | timeout = |
2017 | 1000 * (circuit->area->lsp_gen_interval[lvl - 1] | |
2018 | - diff); | |
d62a17ae | 2019 | sched_debug( |
2020 | "ISIS (%s): Sechduling in %ld ms to match configured lsp_gen_interval", | |
2021 | area->area_tag, timeout); | |
2022 | } else { | |
2023 | timeout = 100; | |
2024 | sched_debug( | |
3efd0893 | 2025 | "ISIS (%s): Last generation was more than lsp_gen_interval ago. Scheduling for execution in %ld ms.", |
d62a17ae | 2026 | area->area_tag, timeout); |
2027 | } | |
2028 | ||
2029 | circuit->lsp_regenerate_pending[lvl - 1] = 1; | |
2030 | ||
2031 | if (lvl == IS_LEVEL_1) { | |
907a2395 | 2032 | event_add_timer_msec( |
d62a17ae | 2033 | master, lsp_l1_refresh_pseudo, circuit, timeout, |
2034 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
2035 | } else if (lvl == IS_LEVEL_2) { | |
907a2395 | 2036 | event_add_timer_msec( |
d62a17ae | 2037 | master, lsp_l2_refresh_pseudo, circuit, timeout, |
2038 | &circuit->u.bc.t_refresh_pseudo_lsp[lvl - 1]); | |
2039 | } | |
2040 | } | |
2041 | ||
2042 | return ISIS_OK; | |
f390d2c7 | 2043 | } |
eb5d44eb | 2044 | |
2045 | /* | |
2046 | * Walk through LSPs for an area | |
2047 | * - set remaining lifetime | |
eb5d44eb | 2048 | */ |
e6685141 | 2049 | void lsp_tick(struct event *thread) |
eb5d44eb | 2050 | { |
d62a17ae | 2051 | struct isis_area *area; |
d62a17ae | 2052 | struct isis_lsp *lsp; |
d62a17ae | 2053 | int level; |
d7c0a89a | 2054 | uint16_t rem_lifetime; |
8e6fb83b | 2055 | bool fabricd_sync_incomplete = false; |
d62a17ae | 2056 | |
d62a17ae | 2057 | area = THREAD_ARG(thread); |
2058 | assert(area); | |
2059 | area->t_tick = NULL; | |
907a2395 | 2060 | event_add_timer(master, lsp_tick, area, 1, &area->t_tick); |
d62a17ae | 2061 | |
8e6fb83b CF |
2062 | struct isis_circuit *fabricd_init_c = fabricd_initial_sync_circuit(area); |
2063 | ||
d62a17ae | 2064 | /* |
9b39405f | 2065 | * Remove LSPs which have aged out |
d62a17ae | 2066 | */ |
2067 | for (level = 0; level < ISIS_LEVELS; level++) { | |
4bef0ec4 | 2068 | struct isis_lsp *next = lspdb_first(&area->lspdb[level]); |
81fddbe7 | 2069 | frr_each_from (lspdb, &area->lspdb[level], lsp, next) { |
4bef0ec4 DL |
2070 | /* |
2071 | * The lsp rem_lifetime is kept at 0 for MaxAge | |
2072 | * or | |
2073 | * ZeroAgeLifetime depending on explicit purge | |
2074 | * or | |
2075 | * natural age out. So schedule spf only once | |
2076 | * when | |
2077 | * the first time rem_lifetime becomes 0. | |
2078 | */ | |
2079 | rem_lifetime = lsp->hdr.rem_lifetime; | |
2080 | lsp_set_time(lsp); | |
d62a17ae | 2081 | |
4bef0ec4 DL |
2082 | /* |
2083 | * Schedule may run spf which should be done | |
2084 | * only after | |
2085 | * the lsp rem_lifetime becomes 0 for the first | |
2086 | * time. | |
2087 | * ISO 10589 - 7.3.16.4 first paragraph. | |
2088 | */ | |
2089 | if (rem_lifetime == 1 && lsp->hdr.seqno != 0) { | |
2090 | /* 7.3.16.4 a) set SRM flags on all */ | |
2091 | /* 7.3.16.4 b) retain only the header */ | |
2092 | if (lsp->area->purge_originator) | |
2093 | lsp_purge(lsp, lsp->level, NULL); | |
2094 | else | |
2095 | lsp_flood(lsp, NULL); | |
2096 | /* 7.3.16.4 c) record the time to purge | |
2097 | * FIXME */ | |
2098 | isis_spf_schedule(lsp->area, lsp->level); | |
d9884a75 | 2099 | isis_te_lsp_event(lsp, LSP_TICK); |
4bef0ec4 | 2100 | } |
0c77e178 | 2101 | |
4bef0ec4 DL |
2102 | if (lsp->age_out == 0) { |
2103 | zlog_debug( | |
6cde4b45 | 2104 | "ISIS-Upd (%s): L%u LSP %s seq 0x%08x aged out", |
4bef0ec4 DL |
2105 | area->area_tag, lsp->level, |
2106 | rawlspid_print(lsp->hdr.lsp_id), | |
2107 | lsp->hdr.seqno); | |
2108 | ||
2109 | /* if we're aging out fragment 0, lsp_destroy() | |
2110 | * below will delete all other fragments too, | |
2111 | * so we need to skip over those | |
2112 | */ | |
2113 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) | |
2114 | while (next && | |
2115 | !memcmp(next->hdr.lsp_id, | |
2116 | lsp->hdr.lsp_id, | |
2117 | ISIS_SYS_ID_LEN + 1)) | |
2118 | next = lspdb_next( | |
2119 | &area->lspdb[level], | |
2120 | next); | |
2121 | ||
2122 | lspdb_del(&area->lspdb[level], lsp); | |
2123 | lsp_destroy(lsp); | |
2124 | lsp = NULL; | |
2125 | } | |
8e6fb83b | 2126 | |
4bef0ec4 DL |
2127 | if (fabricd_init_c && lsp) { |
2128 | fabricd_sync_incomplete |= | |
2129 | ISIS_CHECK_FLAG(lsp->SSNflags, | |
2130 | fabricd_init_c); | |
d62a17ae | 2131 | } |
2132 | } | |
2133 | } | |
2134 | ||
9b39405f CF |
2135 | if (fabricd_init_c |
2136 | && !fabricd_sync_incomplete | |
2137 | && !isis_tx_queue_len(fabricd_init_c->tx_queue)) { | |
8e6fb83b | 2138 | fabricd_initial_sync_finish(area); |
9b39405f | 2139 | } |
eb5d44eb | 2140 | } |
2141 | ||
d7c0a89a | 2142 | void lsp_purge_pseudo(uint8_t *id, struct isis_circuit *circuit, int level) |
eb5d44eb | 2143 | { |
d62a17ae | 2144 | struct isis_lsp *lsp; |
d62a17ae | 2145 | |
4bef0ec4 | 2146 | lsp = lsp_search(&circuit->area->lspdb[level - 1], id); |
d62a17ae | 2147 | if (!lsp) |
2148 | return; | |
2149 | ||
2c92bee4 | 2150 | lsp_purge(lsp, level, NULL); |
eb5d44eb | 2151 | } |
2152 | ||
2153 | /* | |
d62a17ae | 2154 | * Purge own LSP that is received and we don't have. |
eb5d44eb | 2155 | * -> Do as in 7.3.16.4 |
2156 | */ | |
af8ac8f9 | 2157 | void lsp_purge_non_exist(int level, struct isis_lsp_hdr *hdr, |
d62a17ae | 2158 | struct isis_area *area) |
eb5d44eb | 2159 | { |
d62a17ae | 2160 | struct isis_lsp *lsp; |
2161 | ||
2162 | /* | |
2163 | * We need to create the LSP to be purged | |
2164 | */ | |
2165 | lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp)); | |
2166 | lsp->area = area; | |
2167 | lsp->level = level; | |
d07067ba | 2168 | lsp_adjust_stream(lsp); |
af8ac8f9 | 2169 | lsp->age_out = ZERO_AGE_LIFETIME; |
6f004b60 | 2170 | lsp->area->lsp_purge_count[level - 1]++; |
d62a17ae | 2171 | |
af8ac8f9 CF |
2172 | memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr)); |
2173 | lsp->hdr.rem_lifetime = 0; | |
d62a17ae | 2174 | |
2c92bee4 CF |
2175 | lsp_purge_add_poi(lsp, NULL); |
2176 | ||
af8ac8f9 | 2177 | lsp_pack_pdu(lsp); |
d62a17ae | 2178 | |
4bef0ec4 | 2179 | lsp_insert(&area->lspdb[lsp->level - 1], lsp); |
9b39405f | 2180 | lsp_flood(lsp, NULL); |
d62a17ae | 2181 | |
2182 | return; | |
eb5d44eb | 2183 | } |
2184 | ||
9b39405f | 2185 | void lsp_set_all_srmflags(struct isis_lsp *lsp, bool set) |
3f045a08 | 2186 | { |
d62a17ae | 2187 | struct listnode *node; |
2188 | struct isis_circuit *circuit; | |
3f045a08 | 2189 | |
d62a17ae | 2190 | assert(lsp); |
3f045a08 | 2191 | |
9b39405f CF |
2192 | if (!lsp->area) |
2193 | return; | |
3f045a08 | 2194 | |
9b39405f CF |
2195 | struct list *circuit_list = lsp->area->circuit_list; |
2196 | for (ALL_LIST_ELEMENTS_RO(circuit_list, node, circuit)) { | |
2197 | if (set) { | |
2198 | isis_tx_queue_add(circuit->tx_queue, lsp, | |
2199 | TX_LSP_NORMAL); | |
2200 | } else { | |
2201 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
d62a17ae | 2202 | } |
2203 | } | |
3f045a08 | 2204 | } |
9b39405f | 2205 | |
ddb33326 CF |
2206 | void _lsp_flood(struct isis_lsp *lsp, struct isis_circuit *circuit, |
2207 | const char *func, const char *file, int line) | |
9b39405f | 2208 | { |
e740f9c1 | 2209 | if (IS_DEBUG_FLOODING) { |
ddb33326 CF |
2210 | zlog_debug("Flooding LSP %s%s%s (From %s %s:%d)", |
2211 | rawlspid_print(lsp->hdr.lsp_id), | |
2212 | circuit ? " except on " : "", | |
2213 | circuit ? circuit->interface->name : "", | |
2214 | func, file, line); | |
2215 | } | |
2216 | ||
37212c41 | 2217 | if (!fabricd) |
9d224819 | 2218 | lsp_set_all_srmflags(lsp, true); |
37212c41 | 2219 | else |
1eb7c3a1 | 2220 | fabricd_lsp_flood(lsp, circuit); |
37212c41 CF |
2221 | |
2222 | if (circuit) | |
2223 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
9b39405f | 2224 | } |
a5b5e946 CF |
2225 | |
2226 | static int lsp_handle_adj_state_change(struct isis_adjacency *adj) | |
2227 | { | |
2228 | lsp_regenerate_schedule(adj->circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0); | |
77d73edf | 2229 | |
2230 | /* when an adjacency state changes determine if we need to | |
2231 | * change attach_bits in other area's LSPs | |
2232 | */ | |
2233 | isis_reset_attach_bit(adj); | |
2234 | ||
a5b5e946 CF |
2235 | return 0; |
2236 | } | |
2237 | ||
98a49636 RW |
2238 | /* |
2239 | * Iterate over all IP reachability TLVs in a LSP (all fragments) of the given | |
2240 | * address-family and MT-ID. | |
2241 | */ | |
2242 | int isis_lsp_iterate_ip_reach(struct isis_lsp *lsp, int family, uint16_t mtid, | |
2243 | lsp_ip_reach_iter_cb cb, void *arg) | |
2244 | { | |
2245 | bool pseudo_lsp = LSP_PSEUDO_ID(lsp->hdr.lsp_id); | |
2246 | struct isis_lsp *frag; | |
2247 | struct listnode *node; | |
2248 | ||
2249 | if (lsp->hdr.seqno == 0 || lsp->hdr.rem_lifetime == 0) | |
2250 | return LSP_ITER_CONTINUE; | |
2251 | ||
d9884a75 | 2252 | /* Parse LSP */ |
98a49636 RW |
2253 | if (lsp->tlvs) { |
2254 | if (!fabricd && !pseudo_lsp && family == AF_INET | |
2255 | && mtid == ISIS_MT_IPV4_UNICAST) { | |
2256 | struct isis_item_list *reachs[] = { | |
2257 | &lsp->tlvs->oldstyle_ip_reach, | |
2258 | &lsp->tlvs->oldstyle_ip_reach_ext}; | |
2259 | ||
2260 | for (unsigned int i = 0; i < array_size(reachs); i++) { | |
2261 | struct isis_oldstyle_ip_reach *r; | |
2262 | ||
2263 | for (r = (struct isis_oldstyle_ip_reach *) | |
2264 | reachs[i] | |
2265 | ->head; | |
2266 | r; r = r->next) { | |
2267 | bool external = i ? true : false; | |
2268 | ||
2269 | if ((*cb)((struct prefix *)&r->prefix, | |
2270 | r->metric, external, NULL, | |
2271 | arg) | |
2272 | == LSP_ITER_STOP) | |
2273 | return LSP_ITER_STOP; | |
2274 | } | |
2275 | } | |
2276 | } | |
2277 | ||
2278 | if (!pseudo_lsp && family == AF_INET) { | |
2279 | struct isis_item_list *ipv4_reachs; | |
2280 | ||
2281 | if (mtid == ISIS_MT_IPV4_UNICAST) | |
2282 | ipv4_reachs = &lsp->tlvs->extended_ip_reach; | |
2283 | else | |
2284 | ipv4_reachs = isis_lookup_mt_items( | |
2285 | &lsp->tlvs->mt_ip_reach, mtid); | |
2286 | ||
2287 | struct isis_extended_ip_reach *r; | |
2288 | for (r = ipv4_reachs ? (struct isis_extended_ip_reach *) | |
2289 | ipv4_reachs->head | |
2290 | : NULL; | |
2291 | r; r = r->next) { | |
2292 | if ((*cb)((struct prefix *)&r->prefix, | |
2293 | r->metric, false, r->subtlvs, arg) | |
2294 | == LSP_ITER_STOP) | |
2295 | return LSP_ITER_STOP; | |
2296 | } | |
2297 | } | |
2298 | ||
2299 | if (!pseudo_lsp && family == AF_INET6) { | |
2300 | struct isis_item_list *ipv6_reachs; | |
2301 | struct isis_ipv6_reach *r; | |
2302 | ||
2303 | if (mtid == ISIS_MT_IPV4_UNICAST) | |
2304 | ipv6_reachs = &lsp->tlvs->ipv6_reach; | |
2305 | else | |
2306 | ipv6_reachs = isis_lookup_mt_items( | |
2307 | &lsp->tlvs->mt_ipv6_reach, mtid); | |
2308 | ||
2309 | for (r = ipv6_reachs ? (struct isis_ipv6_reach *) | |
2310 | ipv6_reachs->head | |
2311 | : NULL; | |
2312 | r; r = r->next) { | |
2313 | if ((*cb)((struct prefix *)&r->prefix, | |
2314 | r->metric, r->external, r->subtlvs, | |
2315 | arg) | |
2316 | == LSP_ITER_STOP) | |
2317 | return LSP_ITER_STOP; | |
2318 | } | |
2319 | } | |
2320 | } | |
2321 | ||
d9884a75 OD |
2322 | /* Parse LSP fragments if it is not a fragment itself */ |
2323 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) | |
2324 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { | |
2325 | if (!frag->tlvs) | |
2326 | continue; | |
98a49636 | 2327 | |
d9884a75 OD |
2328 | if (isis_lsp_iterate_ip_reach(frag, family, mtid, cb, |
2329 | arg) | |
2330 | == LSP_ITER_STOP) | |
2331 | return LSP_ITER_STOP; | |
2332 | } | |
98a49636 RW |
2333 | |
2334 | return LSP_ITER_CONTINUE; | |
2335 | } | |
2336 | ||
2337 | /* | |
2338 | * Iterate over all IS reachability TLVs in a LSP (all fragments) of the given | |
2339 | * MT-ID. | |
2340 | */ | |
2341 | int isis_lsp_iterate_is_reach(struct isis_lsp *lsp, uint16_t mtid, | |
2342 | lsp_is_reach_iter_cb cb, void *arg) | |
2343 | { | |
2344 | bool pseudo_lsp = LSP_PSEUDO_ID(lsp->hdr.lsp_id); | |
2345 | struct isis_lsp *frag; | |
2346 | struct listnode *node; | |
2347 | struct isis_item *head; | |
2348 | struct isis_item_list *te_neighs; | |
2349 | ||
2350 | if (lsp->hdr.seqno == 0 || lsp->hdr.rem_lifetime == 0) | |
2351 | return LSP_ITER_CONTINUE; | |
2352 | ||
d9884a75 | 2353 | /* Parse LSP */ |
98a49636 RW |
2354 | if (lsp->tlvs) { |
2355 | if (pseudo_lsp || mtid == ISIS_MT_IPV4_UNICAST) { | |
2356 | head = lsp->tlvs->oldstyle_reach.head; | |
2357 | for (struct isis_oldstyle_reach *reach = | |
2358 | (struct isis_oldstyle_reach *)head; | |
2359 | reach; reach = reach->next) { | |
2360 | if ((*cb)(reach->id, reach->metric, true, NULL, | |
2361 | arg) | |
2362 | == LSP_ITER_STOP) | |
2363 | return LSP_ITER_STOP; | |
2364 | } | |
2365 | } | |
2366 | ||
2367 | if (pseudo_lsp || mtid == ISIS_MT_IPV4_UNICAST) | |
2368 | te_neighs = &lsp->tlvs->extended_reach; | |
2369 | else | |
2370 | te_neighs = | |
2371 | isis_get_mt_items(&lsp->tlvs->mt_reach, mtid); | |
2372 | if (te_neighs) { | |
2373 | head = te_neighs->head; | |
2374 | for (struct isis_extended_reach *reach = | |
2375 | (struct isis_extended_reach *)head; | |
2376 | reach; reach = reach->next) { | |
2377 | if ((*cb)(reach->id, reach->metric, false, | |
2378 | reach->subtlvs, arg) | |
2379 | == LSP_ITER_STOP) | |
2380 | return LSP_ITER_STOP; | |
2381 | } | |
2382 | } | |
2383 | } | |
2384 | ||
d9884a75 OD |
2385 | /* Parse LSP fragments if it not a fragment itself. */ |
2386 | if (!LSP_FRAGMENT(lsp->hdr.lsp_id)) | |
2387 | for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { | |
2388 | if (!frag->tlvs) | |
2389 | continue; | |
98a49636 | 2390 | |
d9884a75 OD |
2391 | if (isis_lsp_iterate_is_reach(frag, mtid, cb, arg) |
2392 | == LSP_ITER_STOP) | |
2393 | return LSP_ITER_STOP; | |
2394 | } | |
98a49636 RW |
2395 | |
2396 | return LSP_ITER_CONTINUE; | |
2397 | } | |
2398 | ||
a5b5e946 CF |
2399 | void lsp_init(void) |
2400 | { | |
49b27ea2 | 2401 | device_startup = true; |
a5b5e946 CF |
2402 | hook_register(isis_adj_state_change_hook, |
2403 | lsp_handle_adj_state_change); | |
2404 | } |