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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 | * | |
896014f4 DL |
18 | * You should have received a copy of the GNU General Public License along |
19 | * with this program; see the file COPYING; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
064f4896 CF |
21 | */ |
22 | #include <zebra.h> | |
23 | #include "isisd/isisd.h" | |
24 | #include "isisd/isis_memory.h" | |
25 | #include "isisd/isis_circuit.h" | |
d8fba7d9 CF |
26 | #include "isisd/isis_adjacency.h" |
27 | #include "isisd/isis_tlv.h" | |
206f4aae CF |
28 | #include "isisd/isis_misc.h" |
29 | #include "isisd/isis_lsp.h" | |
064f4896 CF |
30 | #include "isisd/isis_mt.h" |
31 | ||
32 | DEFINE_MTYPE_STATIC(ISISD, MT_AREA_SETTING, "ISIS MT Area Setting") | |
33 | DEFINE_MTYPE_STATIC(ISISD, MT_CIRCUIT_SETTING, "ISIS MT Circuit Setting") | |
d8fba7d9 | 34 | DEFINE_MTYPE_STATIC(ISISD, MT_ADJ_INFO, "ISIS MT Adjacency Info") |
206f4aae | 35 | DEFINE_MTYPE_STATIC(ISISD, MT_NEIGHBORS, "ISIS MT Neighbors for TLV") |
c3ae3127 CF |
36 | DEFINE_MTYPE_STATIC(ISISD, MT_IPV4_REACHS, "ISIS MT IPv4 Reachabilities for TLV") |
37 | DEFINE_MTYPE_STATIC(ISISD, MT_IPV6_REACHS, "ISIS MT IPv6 Reachabilities for TLV") | |
38 | ||
39 | uint16_t isis_area_ipv6_topology(struct isis_area *area) | |
40 | { | |
41 | struct isis_area_mt_setting *area_mt_setting; | |
42 | area_mt_setting = area_lookup_mt_setting(area, ISIS_MT_IPV6_UNICAST); | |
43 | ||
44 | if (area_mt_setting && area_mt_setting->enabled) | |
45 | return ISIS_MT_IPV6_UNICAST; | |
46 | return ISIS_MT_IPV4_UNICAST; | |
47 | } | |
064f4896 CF |
48 | |
49 | /* MT naming api */ | |
50 | const char *isis_mtid2str(uint16_t mtid) | |
51 | { | |
d8fba7d9 CF |
52 | static char buf[sizeof("65535")]; |
53 | ||
064f4896 CF |
54 | switch(mtid) |
55 | { | |
56 | case ISIS_MT_IPV4_UNICAST: | |
57 | return "ipv4-unicast"; | |
58 | case ISIS_MT_IPV4_MGMT: | |
59 | return "ipv4-mgmt"; | |
60 | case ISIS_MT_IPV6_UNICAST: | |
61 | return "ipv6-unicast"; | |
62 | case ISIS_MT_IPV4_MULTICAST: | |
63 | return "ipv4-multicast"; | |
64 | case ISIS_MT_IPV6_MULTICAST: | |
65 | return "ipv6-multicast"; | |
66 | case ISIS_MT_IPV6_MGMT: | |
67 | return "ipv6-mgmt"; | |
68 | default: | |
d8fba7d9 CF |
69 | snprintf(buf, sizeof(buf), "%" PRIu16, mtid); |
70 | return buf; | |
064f4896 CF |
71 | } |
72 | } | |
73 | ||
74 | uint16_t isis_str2mtid(const char *name) | |
75 | { | |
76 | if (!strcmp(name,"ipv4-unicast")) | |
77 | return ISIS_MT_IPV4_UNICAST; | |
78 | if (!strcmp(name,"ipv4-mgmt")) | |
79 | return ISIS_MT_IPV4_MGMT; | |
80 | if (!strcmp(name,"ipv6-unicast")) | |
81 | return ISIS_MT_IPV6_UNICAST; | |
82 | if (!strcmp(name,"ipv4-multicast")) | |
83 | return ISIS_MT_IPV4_MULTICAST; | |
84 | if (!strcmp(name,"ipv6-multicast")) | |
85 | return ISIS_MT_IPV6_MULTICAST; | |
86 | if (!strcmp(name,"ipv6-mgmt")) | |
87 | return ISIS_MT_IPV6_MGMT; | |
88 | return -1; | |
89 | } | |
90 | ||
91 | /* General MT settings api */ | |
92 | ||
93 | struct mt_setting { | |
94 | ISIS_MT_INFO_FIELDS; | |
95 | }; | |
96 | ||
97 | static void * | |
98 | lookup_mt_setting(struct list *mt_list, uint16_t mtid) | |
99 | { | |
100 | struct listnode *node; | |
101 | struct mt_setting *setting; | |
102 | ||
103 | for (ALL_LIST_ELEMENTS_RO(mt_list, node, setting)) | |
104 | { | |
105 | if (setting->mtid == mtid) | |
106 | return setting; | |
107 | } | |
108 | return NULL; | |
109 | } | |
110 | ||
111 | static void | |
112 | add_mt_setting(struct list **mt_list, void *setting) | |
113 | { | |
114 | if (!*mt_list) | |
115 | *mt_list = list_new(); | |
116 | listnode_add(*mt_list, setting); | |
117 | } | |
118 | ||
119 | /* Area specific MT settings api */ | |
120 | ||
121 | struct isis_area_mt_setting* | |
122 | area_lookup_mt_setting(struct isis_area *area, uint16_t mtid) | |
123 | { | |
124 | return lookup_mt_setting(area->mt_settings, mtid); | |
125 | } | |
126 | ||
127 | struct isis_area_mt_setting* | |
128 | area_new_mt_setting(struct isis_area *area, uint16_t mtid) | |
129 | { | |
130 | struct isis_area_mt_setting *setting; | |
131 | ||
132 | setting = XCALLOC(MTYPE_MT_AREA_SETTING, sizeof(*setting)); | |
133 | setting->mtid = mtid; | |
134 | return setting; | |
135 | } | |
136 | ||
137 | static void | |
138 | area_free_mt_setting(void *setting) | |
139 | { | |
140 | XFREE(MTYPE_MT_AREA_SETTING, setting); | |
141 | } | |
142 | ||
143 | void | |
144 | area_add_mt_setting(struct isis_area *area, struct isis_area_mt_setting *setting) | |
145 | { | |
146 | add_mt_setting(&area->mt_settings, setting); | |
147 | } | |
148 | ||
149 | void | |
150 | area_mt_init(struct isis_area *area) | |
151 | { | |
152 | struct isis_area_mt_setting *v4_unicast_setting; | |
153 | ||
154 | /* MTID 0 is always enabled */ | |
155 | v4_unicast_setting = area_new_mt_setting(area, ISIS_MT_IPV4_UNICAST); | |
156 | v4_unicast_setting->enabled = true; | |
157 | add_mt_setting(&area->mt_settings, v4_unicast_setting); | |
158 | area->mt_settings->del = area_free_mt_setting; | |
159 | } | |
160 | ||
161 | void | |
162 | area_mt_finish(struct isis_area *area) | |
163 | { | |
164 | list_delete(area->mt_settings); | |
165 | area->mt_settings = NULL; | |
166 | } | |
167 | ||
168 | struct isis_area_mt_setting * | |
169 | area_get_mt_setting(struct isis_area *area, uint16_t mtid) | |
170 | { | |
171 | struct isis_area_mt_setting *setting; | |
172 | ||
173 | setting = area_lookup_mt_setting(area, mtid); | |
174 | if (!setting) | |
175 | { | |
176 | setting = area_new_mt_setting(area, mtid); | |
177 | area_add_mt_setting(area, setting); | |
178 | } | |
179 | return setting; | |
180 | } | |
181 | ||
182 | int | |
183 | area_write_mt_settings(struct isis_area *area, struct vty *vty) | |
184 | { | |
185 | int written = 0; | |
186 | struct listnode *node; | |
187 | struct isis_area_mt_setting *setting; | |
188 | ||
189 | for (ALL_LIST_ELEMENTS_RO(area->mt_settings, node, setting)) | |
190 | { | |
191 | const char *name = isis_mtid2str(setting->mtid); | |
192 | if (name && setting->enabled) | |
193 | { | |
194 | if (setting->mtid == ISIS_MT_IPV4_UNICAST) | |
195 | continue; /* always enabled, no need to write out config */ | |
196 | vty_out (vty, " topology %s%s%s", name, | |
197 | setting->overload ? " overload" : "", | |
198 | VTY_NEWLINE); | |
199 | written++; | |
200 | } | |
201 | } | |
202 | return written; | |
203 | } | |
204 | ||
99894f9a CF |
205 | bool area_is_mt(struct isis_area *area) |
206 | { | |
207 | struct listnode *node, *node2; | |
208 | struct isis_area_mt_setting *setting; | |
209 | struct isis_circuit *circuit; | |
210 | struct isis_circuit_mt_setting *csetting; | |
211 | ||
212 | for (ALL_LIST_ELEMENTS_RO(area->mt_settings, node, setting)) | |
213 | { | |
214 | if (setting->enabled && setting->mtid != ISIS_MT_IPV4_UNICAST) | |
215 | return true; | |
216 | } | |
217 | for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit)) | |
218 | { | |
219 | for (ALL_LIST_ELEMENTS_RO(circuit->mt_settings, node2, csetting)) | |
220 | { | |
221 | if (!csetting->enabled && csetting->mtid == ISIS_MT_IPV4_UNICAST) | |
222 | return true; | |
223 | } | |
224 | } | |
225 | ||
226 | return false; | |
227 | } | |
228 | ||
229 | struct isis_area_mt_setting** | |
230 | area_mt_settings(struct isis_area *area, unsigned int *mt_count) | |
231 | { | |
232 | static unsigned int size = 0; | |
233 | static struct isis_area_mt_setting **rv = NULL; | |
234 | ||
235 | unsigned int count = 0; | |
236 | struct listnode *node; | |
237 | struct isis_area_mt_setting *setting; | |
238 | ||
239 | for (ALL_LIST_ELEMENTS_RO(area->mt_settings, node, setting)) | |
240 | { | |
241 | if (!setting->enabled) | |
242 | continue; | |
243 | ||
244 | count++; | |
245 | if (count > size) | |
246 | { | |
247 | rv = XREALLOC(MTYPE_TMP, rv, count * sizeof(*rv)); | |
248 | size = count; | |
249 | } | |
250 | rv[count-1] = setting; | |
251 | } | |
252 | ||
253 | *mt_count = count; | |
254 | return rv; | |
255 | } | |
256 | ||
064f4896 CF |
257 | /* Circuit specific MT settings api */ |
258 | ||
259 | struct isis_circuit_mt_setting* | |
260 | circuit_lookup_mt_setting(struct isis_circuit *circuit, uint16_t mtid) | |
261 | { | |
262 | return lookup_mt_setting(circuit->mt_settings, mtid); | |
263 | } | |
264 | ||
265 | struct isis_circuit_mt_setting* | |
266 | circuit_new_mt_setting(struct isis_circuit *circuit, uint16_t mtid) | |
267 | { | |
268 | struct isis_circuit_mt_setting *setting; | |
269 | ||
270 | setting = XCALLOC(MTYPE_MT_CIRCUIT_SETTING, sizeof(*setting)); | |
271 | setting->mtid = mtid; | |
272 | setting->enabled = true; /* Enabled is default for circuit */ | |
273 | return setting; | |
274 | } | |
275 | ||
276 | static void | |
277 | circuit_free_mt_setting(void *setting) | |
278 | { | |
279 | XFREE(MTYPE_MT_CIRCUIT_SETTING, setting); | |
280 | } | |
281 | ||
282 | void | |
283 | circuit_add_mt_setting(struct isis_circuit *circuit, | |
284 | struct isis_circuit_mt_setting *setting) | |
285 | { | |
286 | add_mt_setting(&circuit->mt_settings, setting); | |
287 | } | |
288 | ||
289 | void | |
290 | circuit_mt_init(struct isis_circuit *circuit) | |
291 | { | |
292 | circuit->mt_settings = list_new(); | |
293 | circuit->mt_settings->del = circuit_free_mt_setting; | |
294 | } | |
295 | ||
296 | void | |
297 | circuit_mt_finish(struct isis_circuit *circuit) | |
298 | { | |
299 | list_delete(circuit->mt_settings); | |
300 | circuit->mt_settings = NULL; | |
301 | } | |
302 | ||
303 | struct isis_circuit_mt_setting* | |
304 | circuit_get_mt_setting(struct isis_circuit *circuit, uint16_t mtid) | |
305 | { | |
306 | struct isis_circuit_mt_setting *setting; | |
307 | ||
308 | setting = circuit_lookup_mt_setting(circuit, mtid); | |
309 | if (!setting) | |
310 | { | |
311 | setting = circuit_new_mt_setting(circuit, mtid); | |
312 | circuit_add_mt_setting(circuit, setting); | |
313 | } | |
314 | return setting; | |
315 | } | |
316 | ||
317 | int | |
318 | circuit_write_mt_settings(struct isis_circuit *circuit, struct vty *vty) | |
319 | { | |
320 | int written = 0; | |
321 | struct listnode *node; | |
322 | struct isis_circuit_mt_setting *setting; | |
323 | ||
324 | for (ALL_LIST_ELEMENTS_RO (circuit->mt_settings, node, setting)) | |
325 | { | |
326 | const char *name = isis_mtid2str(setting->mtid); | |
327 | if (name && !setting->enabled) | |
328 | { | |
329 | vty_out (vty, " no isis topology %s%s", name, VTY_NEWLINE); | |
330 | written++; | |
331 | } | |
332 | } | |
333 | return written; | |
334 | } | |
99894f9a CF |
335 | |
336 | struct isis_circuit_mt_setting** | |
337 | circuit_mt_settings(struct isis_circuit *circuit, unsigned int *mt_count) | |
338 | { | |
339 | static unsigned int size = 0; | |
340 | static struct isis_circuit_mt_setting **rv = NULL; | |
341 | ||
342 | struct isis_area_mt_setting **area_settings; | |
343 | unsigned int area_count; | |
344 | ||
345 | unsigned int count = 0; | |
346 | ||
347 | struct listnode *node; | |
348 | struct isis_circuit_mt_setting *setting; | |
349 | ||
350 | area_settings = area_mt_settings(circuit->area, &area_count); | |
351 | ||
352 | for (unsigned int i = 0; i < area_count; i++) | |
353 | { | |
354 | for (ALL_LIST_ELEMENTS_RO(circuit->mt_settings, node, setting)) | |
355 | { | |
356 | if (setting->mtid != area_settings[i]->mtid) | |
357 | continue; | |
358 | break; | |
359 | } | |
360 | if (!setting) | |
361 | setting = circuit_get_mt_setting(circuit, area_settings[i]->mtid); | |
362 | ||
363 | if (!setting->enabled) | |
364 | continue; | |
365 | ||
366 | count++; | |
367 | if (count > size) | |
368 | { | |
369 | rv = XREALLOC(MTYPE_TMP, rv, count * sizeof(*rv)); | |
370 | size = count; | |
371 | } | |
372 | rv[count-1] = setting; | |
373 | } | |
374 | ||
375 | *mt_count = count; | |
376 | return rv; | |
377 | } | |
d8fba7d9 | 378 | |
206f4aae | 379 | /* ADJ specific MT API */ |
d8fba7d9 CF |
380 | static void adj_mt_set(struct isis_adjacency *adj, unsigned int index, |
381 | uint16_t mtid) | |
382 | { | |
383 | if (adj->mt_count < index + 1) | |
384 | { | |
385 | adj->mt_set = XREALLOC(MTYPE_MT_ADJ_INFO, adj->mt_set, | |
386 | (index + 1) * sizeof(*adj->mt_set)); | |
387 | adj->mt_count = index + 1; | |
388 | } | |
389 | adj->mt_set[index] = mtid; | |
390 | } | |
391 | ||
392 | bool | |
393 | tlvs_to_adj_mt_set(struct tlvs *tlvs, bool v4_usable, bool v6_usable, | |
394 | struct isis_adjacency *adj) | |
395 | { | |
396 | struct isis_circuit_mt_setting **mt_settings; | |
397 | unsigned int circuit_mt_count; | |
398 | ||
399 | unsigned int intersect_count = 0; | |
400 | ||
11dde3fa | 401 | uint16_t *old_mt_set = NULL; |
d8fba7d9 CF |
402 | unsigned int old_mt_count; |
403 | ||
404 | old_mt_count = adj->mt_count; | |
405 | if (old_mt_count) | |
406 | { | |
407 | old_mt_set = XCALLOC(MTYPE_TMP, old_mt_count * sizeof(*old_mt_set)); | |
408 | memcpy(old_mt_set, adj->mt_set, old_mt_count * sizeof(*old_mt_set)); | |
409 | } | |
410 | ||
411 | mt_settings = circuit_mt_settings(adj->circuit, &circuit_mt_count); | |
412 | for (unsigned int i = 0; i < circuit_mt_count; i++) | |
413 | { | |
414 | if (!tlvs->mt_router_info) | |
415 | { | |
416 | /* Other end does not have MT enabled */ | |
cb02eebe | 417 | if (mt_settings[i]->mtid == ISIS_MT_IPV4_UNICAST && v4_usable) |
d8fba7d9 CF |
418 | adj_mt_set(adj, intersect_count++, ISIS_MT_IPV4_UNICAST); |
419 | } | |
420 | else | |
421 | { | |
422 | struct listnode *node; | |
423 | struct mt_router_info *info; | |
424 | for (ALL_LIST_ELEMENTS_RO(tlvs->mt_router_info, node, info)) | |
425 | { | |
426 | if (mt_settings[i]->mtid == info->mtid) | |
cb02eebe CF |
427 | { |
428 | bool usable; | |
429 | switch (info->mtid) | |
430 | { | |
431 | case ISIS_MT_IPV4_UNICAST: | |
432 | case ISIS_MT_IPV4_MGMT: | |
433 | case ISIS_MT_IPV4_MULTICAST: | |
434 | usable = v4_usable; | |
435 | break; | |
436 | case ISIS_MT_IPV6_UNICAST: | |
437 | case ISIS_MT_IPV6_MGMT: | |
438 | case ISIS_MT_IPV6_MULTICAST: | |
439 | usable = v6_usable; | |
440 | break; | |
441 | default: | |
442 | usable = true; | |
443 | break; | |
444 | } | |
445 | if (usable) | |
446 | adj_mt_set(adj, intersect_count++, info->mtid); | |
447 | } | |
d8fba7d9 CF |
448 | } |
449 | } | |
450 | } | |
451 | adj->mt_count = intersect_count; | |
452 | ||
453 | bool changed = false; | |
454 | ||
455 | if (adj->mt_count != old_mt_count) | |
456 | changed = true; | |
457 | ||
458 | if (!changed && old_mt_count | |
459 | && memcmp(adj->mt_set, old_mt_set, | |
460 | old_mt_count * sizeof(*old_mt_set))) | |
461 | changed = true; | |
462 | ||
463 | if (old_mt_count) | |
464 | XFREE(MTYPE_TMP, old_mt_set); | |
465 | ||
466 | return changed; | |
467 | } | |
468 | ||
2b67862c CF |
469 | bool |
470 | adj_has_mt(struct isis_adjacency *adj, uint16_t mtid) | |
471 | { | |
472 | for (unsigned int i = 0; i < adj->mt_count; i++) | |
473 | if (adj->mt_set[i] == mtid) | |
474 | return true; | |
475 | return false; | |
476 | } | |
477 | ||
d8fba7d9 CF |
478 | void |
479 | adj_mt_finish(struct isis_adjacency *adj) | |
480 | { | |
481 | XFREE(MTYPE_MT_ADJ_INFO, adj->mt_set); | |
482 | adj->mt_count = 0; | |
483 | } | |
206f4aae | 484 | |
2b67862c CF |
485 | /* TLV Router info api */ |
486 | struct mt_router_info* | |
487 | tlvs_lookup_mt_router_info(struct tlvs *tlvs, uint16_t mtid) | |
488 | { | |
489 | return lookup_mt_setting(tlvs->mt_router_info, mtid); | |
490 | } | |
491 | ||
206f4aae CF |
492 | /* TLV MT Neighbors api */ |
493 | struct tlv_mt_neighbors* | |
494 | tlvs_lookup_mt_neighbors(struct tlvs *tlvs, uint16_t mtid) | |
495 | { | |
496 | return lookup_mt_setting(tlvs->mt_is_neighs, mtid); | |
497 | } | |
498 | ||
499 | static struct tlv_mt_neighbors* | |
500 | tlvs_new_mt_neighbors(uint16_t mtid) | |
501 | { | |
502 | struct tlv_mt_neighbors *rv; | |
503 | ||
504 | rv = XCALLOC(MTYPE_MT_NEIGHBORS, sizeof(*rv)); | |
505 | rv->mtid = mtid; | |
506 | rv->list = list_new(); | |
507 | ||
508 | return rv; | |
509 | }; | |
510 | ||
511 | static void | |
512 | tlvs_free_mt_neighbors(void *arg) | |
513 | { | |
514 | struct tlv_mt_neighbors *neighbors = arg; | |
515 | ||
516 | if (neighbors && neighbors->list) | |
517 | list_delete(neighbors->list); | |
518 | XFREE(MTYPE_MT_NEIGHBORS, neighbors); | |
519 | } | |
520 | ||
521 | static void | |
522 | tlvs_add_mt_neighbors(struct tlvs *tlvs, struct tlv_mt_neighbors *neighbors) | |
523 | { | |
524 | add_mt_setting(&tlvs->mt_is_neighs, neighbors); | |
525 | tlvs->mt_is_neighs->del = tlvs_free_mt_neighbors; | |
526 | } | |
527 | ||
528 | struct tlv_mt_neighbors* | |
529 | tlvs_get_mt_neighbors(struct tlvs *tlvs, uint16_t mtid) | |
530 | { | |
531 | struct tlv_mt_neighbors *neighbors; | |
532 | ||
533 | neighbors = tlvs_lookup_mt_neighbors(tlvs, mtid); | |
534 | if (!neighbors) | |
535 | { | |
536 | neighbors = tlvs_new_mt_neighbors(mtid); | |
537 | tlvs_add_mt_neighbors(tlvs, neighbors); | |
538 | } | |
539 | return neighbors; | |
540 | } | |
541 | ||
c3ae3127 CF |
542 | /* TLV MT IPv4 reach api */ |
543 | struct tlv_mt_ipv4_reachs* | |
544 | tlvs_lookup_mt_ipv4_reachs(struct tlvs *tlvs, uint16_t mtid) | |
545 | { | |
546 | return lookup_mt_setting(tlvs->mt_ipv4_reachs, mtid); | |
547 | } | |
548 | ||
549 | static struct tlv_mt_ipv4_reachs* | |
550 | tlvs_new_mt_ipv4_reachs(uint16_t mtid) | |
551 | { | |
552 | struct tlv_mt_ipv4_reachs *rv; | |
553 | ||
554 | rv = XCALLOC(MTYPE_MT_IPV4_REACHS, sizeof(*rv)); | |
555 | rv->mtid = mtid; | |
556 | rv->list = list_new(); | |
557 | ||
558 | return rv; | |
559 | }; | |
560 | ||
561 | static void | |
562 | tlvs_free_mt_ipv4_reachs(void *arg) | |
563 | { | |
564 | struct tlv_mt_ipv4_reachs *reachs = arg; | |
565 | ||
566 | if (reachs && reachs->list) | |
567 | list_delete(reachs->list); | |
568 | XFREE(MTYPE_MT_IPV4_REACHS, reachs); | |
569 | } | |
570 | ||
571 | static void | |
572 | tlvs_add_mt_ipv4_reachs(struct tlvs *tlvs, struct tlv_mt_ipv4_reachs *reachs) | |
573 | { | |
574 | add_mt_setting(&tlvs->mt_ipv4_reachs, reachs); | |
575 | tlvs->mt_ipv4_reachs->del = tlvs_free_mt_ipv4_reachs; | |
576 | } | |
577 | ||
578 | struct tlv_mt_ipv4_reachs* | |
579 | tlvs_get_mt_ipv4_reachs(struct tlvs *tlvs, uint16_t mtid) | |
580 | { | |
581 | struct tlv_mt_ipv4_reachs *reachs; | |
582 | ||
583 | reachs = tlvs_lookup_mt_ipv4_reachs(tlvs, mtid); | |
584 | if (!reachs) | |
585 | { | |
586 | reachs = tlvs_new_mt_ipv4_reachs(mtid); | |
587 | tlvs_add_mt_ipv4_reachs(tlvs, reachs); | |
588 | } | |
589 | return reachs; | |
590 | } | |
591 | ||
592 | /* TLV MT IPv6 reach api */ | |
593 | struct tlv_mt_ipv6_reachs* | |
594 | tlvs_lookup_mt_ipv6_reachs(struct tlvs *tlvs, uint16_t mtid) | |
595 | { | |
596 | return lookup_mt_setting(tlvs->mt_ipv6_reachs, mtid); | |
597 | } | |
598 | ||
599 | static struct tlv_mt_ipv6_reachs* | |
600 | tlvs_new_mt_ipv6_reachs(uint16_t mtid) | |
601 | { | |
602 | struct tlv_mt_ipv6_reachs *rv; | |
603 | ||
604 | rv = XCALLOC(MTYPE_MT_IPV6_REACHS, sizeof(*rv)); | |
605 | rv->mtid = mtid; | |
606 | rv->list = list_new(); | |
607 | ||
608 | return rv; | |
609 | }; | |
610 | ||
611 | static void | |
612 | tlvs_free_mt_ipv6_reachs(void *arg) | |
613 | { | |
614 | struct tlv_mt_ipv6_reachs *reachs = arg; | |
615 | ||
616 | if (reachs && reachs->list) | |
617 | list_delete(reachs->list); | |
618 | XFREE(MTYPE_MT_IPV6_REACHS, reachs); | |
619 | } | |
620 | ||
621 | static void | |
622 | tlvs_add_mt_ipv6_reachs(struct tlvs *tlvs, struct tlv_mt_ipv6_reachs *reachs) | |
623 | { | |
624 | add_mt_setting(&tlvs->mt_ipv6_reachs, reachs); | |
625 | tlvs->mt_ipv6_reachs->del = tlvs_free_mt_ipv6_reachs; | |
626 | } | |
627 | ||
628 | struct tlv_mt_ipv6_reachs* | |
629 | tlvs_get_mt_ipv6_reachs(struct tlvs *tlvs, uint16_t mtid) | |
630 | { | |
631 | struct tlv_mt_ipv6_reachs *reachs; | |
632 | ||
633 | reachs = tlvs_lookup_mt_ipv6_reachs(tlvs, mtid); | |
634 | if (!reachs) | |
635 | { | |
636 | reachs = tlvs_new_mt_ipv6_reachs(mtid); | |
637 | tlvs_add_mt_ipv6_reachs(tlvs, reachs); | |
638 | } | |
639 | return reachs; | |
640 | } | |
641 | ||
206f4aae CF |
642 | static void |
643 | mt_set_add(uint16_t **mt_set, unsigned int *size, | |
644 | unsigned int *index, uint16_t mtid) | |
645 | { | |
646 | for (unsigned int i = 0; i < *index; i++) | |
647 | { | |
648 | if ((*mt_set)[i] == mtid) | |
649 | return; | |
650 | } | |
651 | ||
652 | if (*index >= *size) | |
653 | { | |
654 | *mt_set = XREALLOC(MTYPE_TMP, *mt_set, sizeof(**mt_set) * ((*index) + 1)); | |
655 | *size = (*index) + 1; | |
656 | } | |
657 | ||
658 | (*mt_set)[*index] = mtid; | |
659 | *index = (*index) + 1; | |
660 | } | |
661 | ||
662 | static uint16_t * | |
663 | circuit_bcast_mt_set(struct isis_circuit *circuit, int level, | |
664 | unsigned int *mt_count) | |
665 | { | |
666 | static uint16_t *rv; | |
667 | static unsigned int size; | |
668 | struct listnode *node; | |
669 | struct isis_adjacency *adj; | |
670 | ||
671 | unsigned int count = 0; | |
672 | ||
673 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
674 | { | |
675 | *mt_count = 0; | |
676 | return NULL; | |
677 | } | |
678 | ||
679 | for (ALL_LIST_ELEMENTS_RO(circuit->u.bc.adjdb[level - 1], node, adj)) | |
680 | { | |
681 | if (adj->adj_state != ISIS_ADJ_UP) | |
682 | continue; | |
683 | for (unsigned int i = 0; i < adj->mt_count; i++) | |
684 | mt_set_add(&rv, &size, &count, adj->mt_set[i]); | |
685 | } | |
686 | ||
687 | *mt_count = count; | |
688 | return rv; | |
689 | } | |
690 | ||
691 | static void | |
692 | tlvs_add_mt_set(struct isis_area *area, | |
693 | struct tlvs *tlvs, unsigned int mt_count, | |
694 | uint16_t *mt_set, struct te_is_neigh *neigh) | |
695 | { | |
696 | for (unsigned int i = 0; i < mt_count; i++) | |
697 | { | |
698 | uint16_t mtid = mt_set[i]; | |
699 | struct te_is_neigh *ne_copy; | |
700 | ||
701 | ne_copy = XCALLOC(MTYPE_ISIS_TLV, sizeof(*ne_copy)); | |
702 | memcpy(ne_copy, neigh, sizeof(*ne_copy)); | |
703 | ||
704 | if (mt_set[i] == ISIS_MT_IPV4_UNICAST) | |
705 | { | |
706 | listnode_add(tlvs->te_is_neighs, ne_copy); | |
707 | lsp_debug("ISIS (%s): Adding %s.%02x as te-style neighbor", | |
708 | area->area_tag, sysid_print(ne_copy->neigh_id), | |
709 | LSP_PSEUDO_ID(ne_copy->neigh_id)); | |
710 | } | |
711 | else | |
712 | { | |
713 | struct tlv_mt_neighbors *neighbors; | |
714 | ||
715 | neighbors = tlvs_get_mt_neighbors(tlvs, mtid); | |
716 | neighbors->list->del = free_tlv; | |
717 | listnode_add(neighbors->list, ne_copy); | |
718 | lsp_debug("ISIS (%s): Adding %s.%02x as mt-style neighbor for %s", | |
719 | area->area_tag, sysid_print(ne_copy->neigh_id), | |
720 | LSP_PSEUDO_ID(ne_copy->neigh_id), isis_mtid2str(mtid)); | |
721 | } | |
722 | } | |
723 | } | |
724 | ||
725 | void | |
726 | tlvs_add_mt_bcast(struct tlvs *tlvs, struct isis_circuit *circuit, | |
727 | int level, struct te_is_neigh *neigh) | |
728 | { | |
729 | unsigned int mt_count; | |
730 | uint16_t *mt_set = circuit_bcast_mt_set(circuit, level, | |
731 | &mt_count); | |
732 | ||
733 | tlvs_add_mt_set(circuit->area, tlvs, mt_count, mt_set, neigh); | |
734 | } | |
735 | ||
736 | void | |
737 | tlvs_add_mt_p2p(struct tlvs *tlvs, struct isis_circuit *circuit, | |
738 | struct te_is_neigh *neigh) | |
739 | { | |
740 | struct isis_adjacency *adj = circuit->u.p2p.neighbor; | |
741 | ||
742 | tlvs_add_mt_set(circuit->area, tlvs, adj->mt_count, adj->mt_set, neigh); | |
743 | } |