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064f4896 CF |
1 | /* |
2 | * IS-IS Rout(e)ing protocol - Multi Topology Support | |
3 | * | |
4 | * Copyright (C) 2017 Christian Franke | |
5 | * | |
6 | * This file is part of FreeRangeRouting (FRR) | |
7 | * | |
8 | * FRR is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2, or (at your option) any | |
11 | * later version. | |
12 | * | |
13 | * FRR is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with FRR; see the file COPYING. If not, write to the Free | |
20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
21 | * 02111-1307, USA. | |
22 | */ | |
23 | #include <zebra.h> | |
24 | #include "isisd/isisd.h" | |
25 | #include "isisd/isis_memory.h" | |
26 | #include "isisd/isis_circuit.h" | |
d8fba7d9 CF |
27 | #include "isisd/isis_adjacency.h" |
28 | #include "isisd/isis_tlv.h" | |
206f4aae CF |
29 | #include "isisd/isis_misc.h" |
30 | #include "isisd/isis_lsp.h" | |
064f4896 CF |
31 | #include "isisd/isis_mt.h" |
32 | ||
33 | DEFINE_MTYPE_STATIC(ISISD, MT_AREA_SETTING, "ISIS MT Area Setting") | |
34 | DEFINE_MTYPE_STATIC(ISISD, MT_CIRCUIT_SETTING, "ISIS MT Circuit Setting") | |
d8fba7d9 | 35 | DEFINE_MTYPE_STATIC(ISISD, MT_ADJ_INFO, "ISIS MT Adjacency Info") |
206f4aae | 36 | DEFINE_MTYPE_STATIC(ISISD, MT_NEIGHBORS, "ISIS MT Neighbors for TLV") |
c3ae3127 CF |
37 | DEFINE_MTYPE_STATIC(ISISD, MT_IPV4_REACHS, "ISIS MT IPv4 Reachabilities for TLV") |
38 | DEFINE_MTYPE_STATIC(ISISD, MT_IPV6_REACHS, "ISIS MT IPv6 Reachabilities for TLV") | |
39 | ||
40 | uint16_t isis_area_ipv6_topology(struct isis_area *area) | |
41 | { | |
42 | struct isis_area_mt_setting *area_mt_setting; | |
43 | area_mt_setting = area_lookup_mt_setting(area, ISIS_MT_IPV6_UNICAST); | |
44 | ||
45 | if (area_mt_setting && area_mt_setting->enabled) | |
46 | return ISIS_MT_IPV6_UNICAST; | |
47 | return ISIS_MT_IPV4_UNICAST; | |
48 | } | |
064f4896 CF |
49 | |
50 | /* MT naming api */ | |
51 | const char *isis_mtid2str(uint16_t mtid) | |
52 | { | |
d8fba7d9 CF |
53 | static char buf[sizeof("65535")]; |
54 | ||
064f4896 CF |
55 | switch(mtid) |
56 | { | |
57 | case ISIS_MT_IPV4_UNICAST: | |
58 | return "ipv4-unicast"; | |
59 | case ISIS_MT_IPV4_MGMT: | |
60 | return "ipv4-mgmt"; | |
61 | case ISIS_MT_IPV6_UNICAST: | |
62 | return "ipv6-unicast"; | |
63 | case ISIS_MT_IPV4_MULTICAST: | |
64 | return "ipv4-multicast"; | |
65 | case ISIS_MT_IPV6_MULTICAST: | |
66 | return "ipv6-multicast"; | |
67 | case ISIS_MT_IPV6_MGMT: | |
68 | return "ipv6-mgmt"; | |
69 | default: | |
d8fba7d9 CF |
70 | snprintf(buf, sizeof(buf), "%" PRIu16, mtid); |
71 | return buf; | |
064f4896 CF |
72 | } |
73 | } | |
74 | ||
75 | uint16_t isis_str2mtid(const char *name) | |
76 | { | |
77 | if (!strcmp(name,"ipv4-unicast")) | |
78 | return ISIS_MT_IPV4_UNICAST; | |
79 | if (!strcmp(name,"ipv4-mgmt")) | |
80 | return ISIS_MT_IPV4_MGMT; | |
81 | if (!strcmp(name,"ipv6-unicast")) | |
82 | return ISIS_MT_IPV6_UNICAST; | |
83 | if (!strcmp(name,"ipv4-multicast")) | |
84 | return ISIS_MT_IPV4_MULTICAST; | |
85 | if (!strcmp(name,"ipv6-multicast")) | |
86 | return ISIS_MT_IPV6_MULTICAST; | |
87 | if (!strcmp(name,"ipv6-mgmt")) | |
88 | return ISIS_MT_IPV6_MGMT; | |
89 | return -1; | |
90 | } | |
91 | ||
92 | /* General MT settings api */ | |
93 | ||
94 | struct mt_setting { | |
95 | ISIS_MT_INFO_FIELDS; | |
96 | }; | |
97 | ||
98 | static void * | |
99 | lookup_mt_setting(struct list *mt_list, uint16_t mtid) | |
100 | { | |
101 | struct listnode *node; | |
102 | struct mt_setting *setting; | |
103 | ||
104 | for (ALL_LIST_ELEMENTS_RO(mt_list, node, setting)) | |
105 | { | |
106 | if (setting->mtid == mtid) | |
107 | return setting; | |
108 | } | |
109 | return NULL; | |
110 | } | |
111 | ||
112 | static void | |
113 | add_mt_setting(struct list **mt_list, void *setting) | |
114 | { | |
115 | if (!*mt_list) | |
116 | *mt_list = list_new(); | |
117 | listnode_add(*mt_list, setting); | |
118 | } | |
119 | ||
120 | /* Area specific MT settings api */ | |
121 | ||
122 | struct isis_area_mt_setting* | |
123 | area_lookup_mt_setting(struct isis_area *area, uint16_t mtid) | |
124 | { | |
125 | return lookup_mt_setting(area->mt_settings, mtid); | |
126 | } | |
127 | ||
128 | struct isis_area_mt_setting* | |
129 | area_new_mt_setting(struct isis_area *area, uint16_t mtid) | |
130 | { | |
131 | struct isis_area_mt_setting *setting; | |
132 | ||
133 | setting = XCALLOC(MTYPE_MT_AREA_SETTING, sizeof(*setting)); | |
134 | setting->mtid = mtid; | |
135 | return setting; | |
136 | } | |
137 | ||
138 | static void | |
139 | area_free_mt_setting(void *setting) | |
140 | { | |
141 | XFREE(MTYPE_MT_AREA_SETTING, setting); | |
142 | } | |
143 | ||
144 | void | |
145 | area_add_mt_setting(struct isis_area *area, struct isis_area_mt_setting *setting) | |
146 | { | |
147 | add_mt_setting(&area->mt_settings, setting); | |
148 | } | |
149 | ||
150 | void | |
151 | area_mt_init(struct isis_area *area) | |
152 | { | |
153 | struct isis_area_mt_setting *v4_unicast_setting; | |
154 | ||
155 | /* MTID 0 is always enabled */ | |
156 | v4_unicast_setting = area_new_mt_setting(area, ISIS_MT_IPV4_UNICAST); | |
157 | v4_unicast_setting->enabled = true; | |
158 | add_mt_setting(&area->mt_settings, v4_unicast_setting); | |
159 | area->mt_settings->del = area_free_mt_setting; | |
160 | } | |
161 | ||
162 | void | |
163 | area_mt_finish(struct isis_area *area) | |
164 | { | |
165 | list_delete(area->mt_settings); | |
166 | area->mt_settings = NULL; | |
167 | } | |
168 | ||
169 | struct isis_area_mt_setting * | |
170 | area_get_mt_setting(struct isis_area *area, uint16_t mtid) | |
171 | { | |
172 | struct isis_area_mt_setting *setting; | |
173 | ||
174 | setting = area_lookup_mt_setting(area, mtid); | |
175 | if (!setting) | |
176 | { | |
177 | setting = area_new_mt_setting(area, mtid); | |
178 | area_add_mt_setting(area, setting); | |
179 | } | |
180 | return setting; | |
181 | } | |
182 | ||
183 | int | |
184 | area_write_mt_settings(struct isis_area *area, struct vty *vty) | |
185 | { | |
186 | int written = 0; | |
187 | struct listnode *node; | |
188 | struct isis_area_mt_setting *setting; | |
189 | ||
190 | for (ALL_LIST_ELEMENTS_RO(area->mt_settings, node, setting)) | |
191 | { | |
192 | const char *name = isis_mtid2str(setting->mtid); | |
193 | if (name && setting->enabled) | |
194 | { | |
195 | if (setting->mtid == ISIS_MT_IPV4_UNICAST) | |
196 | continue; /* always enabled, no need to write out config */ | |
197 | vty_out (vty, " topology %s%s%s", name, | |
198 | setting->overload ? " overload" : "", | |
199 | VTY_NEWLINE); | |
200 | written++; | |
201 | } | |
202 | } | |
203 | return written; | |
204 | } | |
205 | ||
99894f9a CF |
206 | bool area_is_mt(struct isis_area *area) |
207 | { | |
208 | struct listnode *node, *node2; | |
209 | struct isis_area_mt_setting *setting; | |
210 | struct isis_circuit *circuit; | |
211 | struct isis_circuit_mt_setting *csetting; | |
212 | ||
213 | for (ALL_LIST_ELEMENTS_RO(area->mt_settings, node, setting)) | |
214 | { | |
215 | if (setting->enabled && setting->mtid != ISIS_MT_IPV4_UNICAST) | |
216 | return true; | |
217 | } | |
218 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit)) | |
219 | { | |
220 | for (ALL_LIST_ELEMENTS_RO(circuit->mt_settings, node2, csetting)) | |
221 | { | |
222 | if (!csetting->enabled && csetting->mtid == ISIS_MT_IPV4_UNICAST) | |
223 | return true; | |
224 | } | |
225 | } | |
226 | ||
227 | return false; | |
228 | } | |
229 | ||
230 | struct isis_area_mt_setting** | |
231 | area_mt_settings(struct isis_area *area, unsigned int *mt_count) | |
232 | { | |
233 | static unsigned int size = 0; | |
234 | static struct isis_area_mt_setting **rv = NULL; | |
235 | ||
236 | unsigned int count = 0; | |
237 | struct listnode *node; | |
238 | struct isis_area_mt_setting *setting; | |
239 | ||
240 | for (ALL_LIST_ELEMENTS_RO(area->mt_settings, node, setting)) | |
241 | { | |
242 | if (!setting->enabled) | |
243 | continue; | |
244 | ||
245 | count++; | |
246 | if (count > size) | |
247 | { | |
248 | rv = XREALLOC(MTYPE_TMP, rv, count * sizeof(*rv)); | |
249 | size = count; | |
250 | } | |
251 | rv[count-1] = setting; | |
252 | } | |
253 | ||
254 | *mt_count = count; | |
255 | return rv; | |
256 | } | |
257 | ||
064f4896 CF |
258 | /* Circuit specific MT settings api */ |
259 | ||
260 | struct isis_circuit_mt_setting* | |
261 | circuit_lookup_mt_setting(struct isis_circuit *circuit, uint16_t mtid) | |
262 | { | |
263 | return lookup_mt_setting(circuit->mt_settings, mtid); | |
264 | } | |
265 | ||
266 | struct isis_circuit_mt_setting* | |
267 | circuit_new_mt_setting(struct isis_circuit *circuit, uint16_t mtid) | |
268 | { | |
269 | struct isis_circuit_mt_setting *setting; | |
270 | ||
271 | setting = XCALLOC(MTYPE_MT_CIRCUIT_SETTING, sizeof(*setting)); | |
272 | setting->mtid = mtid; | |
273 | setting->enabled = true; /* Enabled is default for circuit */ | |
274 | return setting; | |
275 | } | |
276 | ||
277 | static void | |
278 | circuit_free_mt_setting(void *setting) | |
279 | { | |
280 | XFREE(MTYPE_MT_CIRCUIT_SETTING, setting); | |
281 | } | |
282 | ||
283 | void | |
284 | circuit_add_mt_setting(struct isis_circuit *circuit, | |
285 | struct isis_circuit_mt_setting *setting) | |
286 | { | |
287 | add_mt_setting(&circuit->mt_settings, setting); | |
288 | } | |
289 | ||
290 | void | |
291 | circuit_mt_init(struct isis_circuit *circuit) | |
292 | { | |
293 | circuit->mt_settings = list_new(); | |
294 | circuit->mt_settings->del = circuit_free_mt_setting; | |
295 | } | |
296 | ||
297 | void | |
298 | circuit_mt_finish(struct isis_circuit *circuit) | |
299 | { | |
300 | list_delete(circuit->mt_settings); | |
301 | circuit->mt_settings = NULL; | |
302 | } | |
303 | ||
304 | struct isis_circuit_mt_setting* | |
305 | circuit_get_mt_setting(struct isis_circuit *circuit, uint16_t mtid) | |
306 | { | |
307 | struct isis_circuit_mt_setting *setting; | |
308 | ||
309 | setting = circuit_lookup_mt_setting(circuit, mtid); | |
310 | if (!setting) | |
311 | { | |
312 | setting = circuit_new_mt_setting(circuit, mtid); | |
313 | circuit_add_mt_setting(circuit, setting); | |
314 | } | |
315 | return setting; | |
316 | } | |
317 | ||
318 | int | |
319 | circuit_write_mt_settings(struct isis_circuit *circuit, struct vty *vty) | |
320 | { | |
321 | int written = 0; | |
322 | struct listnode *node; | |
323 | struct isis_circuit_mt_setting *setting; | |
324 | ||
325 | for (ALL_LIST_ELEMENTS_RO (circuit->mt_settings, node, setting)) | |
326 | { | |
327 | const char *name = isis_mtid2str(setting->mtid); | |
328 | if (name && !setting->enabled) | |
329 | { | |
330 | vty_out (vty, " no isis topology %s%s", name, VTY_NEWLINE); | |
331 | written++; | |
332 | } | |
333 | } | |
334 | return written; | |
335 | } | |
99894f9a CF |
336 | |
337 | struct isis_circuit_mt_setting** | |
338 | circuit_mt_settings(struct isis_circuit *circuit, unsigned int *mt_count) | |
339 | { | |
340 | static unsigned int size = 0; | |
341 | static struct isis_circuit_mt_setting **rv = NULL; | |
342 | ||
343 | struct isis_area_mt_setting **area_settings; | |
344 | unsigned int area_count; | |
345 | ||
346 | unsigned int count = 0; | |
347 | ||
348 | struct listnode *node; | |
349 | struct isis_circuit_mt_setting *setting; | |
350 | ||
351 | area_settings = area_mt_settings(circuit->area, &area_count); | |
352 | ||
353 | for (unsigned int i = 0; i < area_count; i++) | |
354 | { | |
355 | for (ALL_LIST_ELEMENTS_RO(circuit->mt_settings, node, setting)) | |
356 | { | |
357 | if (setting->mtid != area_settings[i]->mtid) | |
358 | continue; | |
359 | break; | |
360 | } | |
361 | if (!setting) | |
362 | setting = circuit_get_mt_setting(circuit, area_settings[i]->mtid); | |
363 | ||
364 | if (!setting->enabled) | |
365 | continue; | |
366 | ||
367 | count++; | |
368 | if (count > size) | |
369 | { | |
370 | rv = XREALLOC(MTYPE_TMP, rv, count * sizeof(*rv)); | |
371 | size = count; | |
372 | } | |
373 | rv[count-1] = setting; | |
374 | } | |
375 | ||
376 | *mt_count = count; | |
377 | return rv; | |
378 | } | |
d8fba7d9 | 379 | |
206f4aae | 380 | /* ADJ specific MT API */ |
d8fba7d9 CF |
381 | static void adj_mt_set(struct isis_adjacency *adj, unsigned int index, |
382 | uint16_t mtid) | |
383 | { | |
384 | if (adj->mt_count < index + 1) | |
385 | { | |
386 | adj->mt_set = XREALLOC(MTYPE_MT_ADJ_INFO, adj->mt_set, | |
387 | (index + 1) * sizeof(*adj->mt_set)); | |
388 | adj->mt_count = index + 1; | |
389 | } | |
390 | adj->mt_set[index] = mtid; | |
391 | } | |
392 | ||
393 | bool | |
394 | tlvs_to_adj_mt_set(struct tlvs *tlvs, bool v4_usable, bool v6_usable, | |
395 | struct isis_adjacency *adj) | |
396 | { | |
397 | struct isis_circuit_mt_setting **mt_settings; | |
398 | unsigned int circuit_mt_count; | |
399 | ||
400 | unsigned int intersect_count = 0; | |
401 | ||
11dde3fa | 402 | uint16_t *old_mt_set = NULL; |
d8fba7d9 CF |
403 | unsigned int old_mt_count; |
404 | ||
405 | old_mt_count = adj->mt_count; | |
406 | if (old_mt_count) | |
407 | { | |
408 | old_mt_set = XCALLOC(MTYPE_TMP, old_mt_count * sizeof(*old_mt_set)); | |
409 | memcpy(old_mt_set, adj->mt_set, old_mt_count * sizeof(*old_mt_set)); | |
410 | } | |
411 | ||
412 | mt_settings = circuit_mt_settings(adj->circuit, &circuit_mt_count); | |
413 | for (unsigned int i = 0; i < circuit_mt_count; i++) | |
414 | { | |
415 | if (!tlvs->mt_router_info) | |
416 | { | |
417 | /* Other end does not have MT enabled */ | |
cb02eebe | 418 | if (mt_settings[i]->mtid == ISIS_MT_IPV4_UNICAST && v4_usable) |
d8fba7d9 CF |
419 | adj_mt_set(adj, intersect_count++, ISIS_MT_IPV4_UNICAST); |
420 | } | |
421 | else | |
422 | { | |
423 | struct listnode *node; | |
424 | struct mt_router_info *info; | |
425 | for (ALL_LIST_ELEMENTS_RO(tlvs->mt_router_info, node, info)) | |
426 | { | |
427 | if (mt_settings[i]->mtid == info->mtid) | |
cb02eebe CF |
428 | { |
429 | bool usable; | |
430 | switch (info->mtid) | |
431 | { | |
432 | case ISIS_MT_IPV4_UNICAST: | |
433 | case ISIS_MT_IPV4_MGMT: | |
434 | case ISIS_MT_IPV4_MULTICAST: | |
435 | usable = v4_usable; | |
436 | break; | |
437 | case ISIS_MT_IPV6_UNICAST: | |
438 | case ISIS_MT_IPV6_MGMT: | |
439 | case ISIS_MT_IPV6_MULTICAST: | |
440 | usable = v6_usable; | |
441 | break; | |
442 | default: | |
443 | usable = true; | |
444 | break; | |
445 | } | |
446 | if (usable) | |
447 | adj_mt_set(adj, intersect_count++, info->mtid); | |
448 | } | |
d8fba7d9 CF |
449 | } |
450 | } | |
451 | } | |
452 | adj->mt_count = intersect_count; | |
453 | ||
454 | bool changed = false; | |
455 | ||
456 | if (adj->mt_count != old_mt_count) | |
457 | changed = true; | |
458 | ||
459 | if (!changed && old_mt_count | |
460 | && memcmp(adj->mt_set, old_mt_set, | |
461 | old_mt_count * sizeof(*old_mt_set))) | |
462 | changed = true; | |
463 | ||
464 | if (old_mt_count) | |
465 | XFREE(MTYPE_TMP, old_mt_set); | |
466 | ||
467 | return changed; | |
468 | } | |
469 | ||
2b67862c CF |
470 | bool |
471 | adj_has_mt(struct isis_adjacency *adj, uint16_t mtid) | |
472 | { | |
473 | for (unsigned int i = 0; i < adj->mt_count; i++) | |
474 | if (adj->mt_set[i] == mtid) | |
475 | return true; | |
476 | return false; | |
477 | } | |
478 | ||
d8fba7d9 CF |
479 | void |
480 | adj_mt_finish(struct isis_adjacency *adj) | |
481 | { | |
482 | XFREE(MTYPE_MT_ADJ_INFO, adj->mt_set); | |
483 | adj->mt_count = 0; | |
484 | } | |
206f4aae | 485 | |
2b67862c CF |
486 | /* TLV Router info api */ |
487 | struct mt_router_info* | |
488 | tlvs_lookup_mt_router_info(struct tlvs *tlvs, uint16_t mtid) | |
489 | { | |
490 | return lookup_mt_setting(tlvs->mt_router_info, mtid); | |
491 | } | |
492 | ||
206f4aae CF |
493 | /* TLV MT Neighbors api */ |
494 | struct tlv_mt_neighbors* | |
495 | tlvs_lookup_mt_neighbors(struct tlvs *tlvs, uint16_t mtid) | |
496 | { | |
497 | return lookup_mt_setting(tlvs->mt_is_neighs, mtid); | |
498 | } | |
499 | ||
500 | static struct tlv_mt_neighbors* | |
501 | tlvs_new_mt_neighbors(uint16_t mtid) | |
502 | { | |
503 | struct tlv_mt_neighbors *rv; | |
504 | ||
505 | rv = XCALLOC(MTYPE_MT_NEIGHBORS, sizeof(*rv)); | |
506 | rv->mtid = mtid; | |
507 | rv->list = list_new(); | |
508 | ||
509 | return rv; | |
510 | }; | |
511 | ||
512 | static void | |
513 | tlvs_free_mt_neighbors(void *arg) | |
514 | { | |
515 | struct tlv_mt_neighbors *neighbors = arg; | |
516 | ||
517 | if (neighbors && neighbors->list) | |
518 | list_delete(neighbors->list); | |
519 | XFREE(MTYPE_MT_NEIGHBORS, neighbors); | |
520 | } | |
521 | ||
522 | static void | |
523 | tlvs_add_mt_neighbors(struct tlvs *tlvs, struct tlv_mt_neighbors *neighbors) | |
524 | { | |
525 | add_mt_setting(&tlvs->mt_is_neighs, neighbors); | |
526 | tlvs->mt_is_neighs->del = tlvs_free_mt_neighbors; | |
527 | } | |
528 | ||
529 | struct tlv_mt_neighbors* | |
530 | tlvs_get_mt_neighbors(struct tlvs *tlvs, uint16_t mtid) | |
531 | { | |
532 | struct tlv_mt_neighbors *neighbors; | |
533 | ||
534 | neighbors = tlvs_lookup_mt_neighbors(tlvs, mtid); | |
535 | if (!neighbors) | |
536 | { | |
537 | neighbors = tlvs_new_mt_neighbors(mtid); | |
538 | tlvs_add_mt_neighbors(tlvs, neighbors); | |
539 | } | |
540 | return neighbors; | |
541 | } | |
542 | ||
c3ae3127 CF |
543 | /* TLV MT IPv4 reach api */ |
544 | struct tlv_mt_ipv4_reachs* | |
545 | tlvs_lookup_mt_ipv4_reachs(struct tlvs *tlvs, uint16_t mtid) | |
546 | { | |
547 | return lookup_mt_setting(tlvs->mt_ipv4_reachs, mtid); | |
548 | } | |
549 | ||
550 | static struct tlv_mt_ipv4_reachs* | |
551 | tlvs_new_mt_ipv4_reachs(uint16_t mtid) | |
552 | { | |
553 | struct tlv_mt_ipv4_reachs *rv; | |
554 | ||
555 | rv = XCALLOC(MTYPE_MT_IPV4_REACHS, sizeof(*rv)); | |
556 | rv->mtid = mtid; | |
557 | rv->list = list_new(); | |
558 | ||
559 | return rv; | |
560 | }; | |
561 | ||
562 | static void | |
563 | tlvs_free_mt_ipv4_reachs(void *arg) | |
564 | { | |
565 | struct tlv_mt_ipv4_reachs *reachs = arg; | |
566 | ||
567 | if (reachs && reachs->list) | |
568 | list_delete(reachs->list); | |
569 | XFREE(MTYPE_MT_IPV4_REACHS, reachs); | |
570 | } | |
571 | ||
572 | static void | |
573 | tlvs_add_mt_ipv4_reachs(struct tlvs *tlvs, struct tlv_mt_ipv4_reachs *reachs) | |
574 | { | |
575 | add_mt_setting(&tlvs->mt_ipv4_reachs, reachs); | |
576 | tlvs->mt_ipv4_reachs->del = tlvs_free_mt_ipv4_reachs; | |
577 | } | |
578 | ||
579 | struct tlv_mt_ipv4_reachs* | |
580 | tlvs_get_mt_ipv4_reachs(struct tlvs *tlvs, uint16_t mtid) | |
581 | { | |
582 | struct tlv_mt_ipv4_reachs *reachs; | |
583 | ||
584 | reachs = tlvs_lookup_mt_ipv4_reachs(tlvs, mtid); | |
585 | if (!reachs) | |
586 | { | |
587 | reachs = tlvs_new_mt_ipv4_reachs(mtid); | |
588 | tlvs_add_mt_ipv4_reachs(tlvs, reachs); | |
589 | } | |
590 | return reachs; | |
591 | } | |
592 | ||
593 | /* TLV MT IPv6 reach api */ | |
594 | struct tlv_mt_ipv6_reachs* | |
595 | tlvs_lookup_mt_ipv6_reachs(struct tlvs *tlvs, uint16_t mtid) | |
596 | { | |
597 | return lookup_mt_setting(tlvs->mt_ipv6_reachs, mtid); | |
598 | } | |
599 | ||
600 | static struct tlv_mt_ipv6_reachs* | |
601 | tlvs_new_mt_ipv6_reachs(uint16_t mtid) | |
602 | { | |
603 | struct tlv_mt_ipv6_reachs *rv; | |
604 | ||
605 | rv = XCALLOC(MTYPE_MT_IPV6_REACHS, sizeof(*rv)); | |
606 | rv->mtid = mtid; | |
607 | rv->list = list_new(); | |
608 | ||
609 | return rv; | |
610 | }; | |
611 | ||
612 | static void | |
613 | tlvs_free_mt_ipv6_reachs(void *arg) | |
614 | { | |
615 | struct tlv_mt_ipv6_reachs *reachs = arg; | |
616 | ||
617 | if (reachs && reachs->list) | |
618 | list_delete(reachs->list); | |
619 | XFREE(MTYPE_MT_IPV6_REACHS, reachs); | |
620 | } | |
621 | ||
622 | static void | |
623 | tlvs_add_mt_ipv6_reachs(struct tlvs *tlvs, struct tlv_mt_ipv6_reachs *reachs) | |
624 | { | |
625 | add_mt_setting(&tlvs->mt_ipv6_reachs, reachs); | |
626 | tlvs->mt_ipv6_reachs->del = tlvs_free_mt_ipv6_reachs; | |
627 | } | |
628 | ||
629 | struct tlv_mt_ipv6_reachs* | |
630 | tlvs_get_mt_ipv6_reachs(struct tlvs *tlvs, uint16_t mtid) | |
631 | { | |
632 | struct tlv_mt_ipv6_reachs *reachs; | |
633 | ||
634 | reachs = tlvs_lookup_mt_ipv6_reachs(tlvs, mtid); | |
635 | if (!reachs) | |
636 | { | |
637 | reachs = tlvs_new_mt_ipv6_reachs(mtid); | |
638 | tlvs_add_mt_ipv6_reachs(tlvs, reachs); | |
639 | } | |
640 | return reachs; | |
641 | } | |
642 | ||
206f4aae CF |
643 | static void |
644 | mt_set_add(uint16_t **mt_set, unsigned int *size, | |
645 | unsigned int *index, uint16_t mtid) | |
646 | { | |
647 | for (unsigned int i = 0; i < *index; i++) | |
648 | { | |
649 | if ((*mt_set)[i] == mtid) | |
650 | return; | |
651 | } | |
652 | ||
653 | if (*index >= *size) | |
654 | { | |
655 | *mt_set = XREALLOC(MTYPE_TMP, *mt_set, sizeof(**mt_set) * ((*index) + 1)); | |
656 | *size = (*index) + 1; | |
657 | } | |
658 | ||
659 | (*mt_set)[*index] = mtid; | |
660 | *index = (*index) + 1; | |
661 | } | |
662 | ||
663 | static uint16_t * | |
664 | circuit_bcast_mt_set(struct isis_circuit *circuit, int level, | |
665 | unsigned int *mt_count) | |
666 | { | |
667 | static uint16_t *rv; | |
668 | static unsigned int size; | |
669 | struct listnode *node; | |
670 | struct isis_adjacency *adj; | |
671 | ||
672 | unsigned int count = 0; | |
673 | ||
674 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
675 | { | |
676 | *mt_count = 0; | |
677 | return NULL; | |
678 | } | |
679 | ||
680 | for (ALL_LIST_ELEMENTS_RO(circuit->u.bc.adjdb[level - 1], node, adj)) | |
681 | { | |
682 | if (adj->adj_state != ISIS_ADJ_UP) | |
683 | continue; | |
684 | for (unsigned int i = 0; i < adj->mt_count; i++) | |
685 | mt_set_add(&rv, &size, &count, adj->mt_set[i]); | |
686 | } | |
687 | ||
688 | *mt_count = count; | |
689 | return rv; | |
690 | } | |
691 | ||
692 | static void | |
693 | tlvs_add_mt_set(struct isis_area *area, | |
694 | struct tlvs *tlvs, unsigned int mt_count, | |
695 | uint16_t *mt_set, struct te_is_neigh *neigh) | |
696 | { | |
697 | for (unsigned int i = 0; i < mt_count; i++) | |
698 | { | |
699 | uint16_t mtid = mt_set[i]; | |
700 | struct te_is_neigh *ne_copy; | |
701 | ||
702 | ne_copy = XCALLOC(MTYPE_ISIS_TLV, sizeof(*ne_copy)); | |
703 | memcpy(ne_copy, neigh, sizeof(*ne_copy)); | |
704 | ||
705 | if (mt_set[i] == ISIS_MT_IPV4_UNICAST) | |
706 | { | |
707 | listnode_add(tlvs->te_is_neighs, ne_copy); | |
708 | lsp_debug("ISIS (%s): Adding %s.%02x as te-style neighbor", | |
709 | area->area_tag, sysid_print(ne_copy->neigh_id), | |
710 | LSP_PSEUDO_ID(ne_copy->neigh_id)); | |
711 | } | |
712 | else | |
713 | { | |
714 | struct tlv_mt_neighbors *neighbors; | |
715 | ||
716 | neighbors = tlvs_get_mt_neighbors(tlvs, mtid); | |
717 | neighbors->list->del = free_tlv; | |
718 | listnode_add(neighbors->list, ne_copy); | |
719 | lsp_debug("ISIS (%s): Adding %s.%02x as mt-style neighbor for %s", | |
720 | area->area_tag, sysid_print(ne_copy->neigh_id), | |
721 | LSP_PSEUDO_ID(ne_copy->neigh_id), isis_mtid2str(mtid)); | |
722 | } | |
723 | } | |
724 | } | |
725 | ||
726 | void | |
727 | tlvs_add_mt_bcast(struct tlvs *tlvs, struct isis_circuit *circuit, | |
728 | int level, struct te_is_neigh *neigh) | |
729 | { | |
730 | unsigned int mt_count; | |
731 | uint16_t *mt_set = circuit_bcast_mt_set(circuit, level, | |
732 | &mt_count); | |
733 | ||
734 | tlvs_add_mt_set(circuit->area, tlvs, mt_count, mt_set, neigh); | |
735 | } | |
736 | ||
737 | void | |
738 | tlvs_add_mt_p2p(struct tlvs *tlvs, struct isis_circuit *circuit, | |
739 | struct te_is_neigh *neigh) | |
740 | { | |
741 | struct isis_adjacency *adj = circuit->u.p2p.neighbor; | |
742 | ||
743 | tlvs_add_mt_set(circuit->area, tlvs, adj->mt_count, adj->mt_set, neigh); | |
744 | } |