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1 | /* AS path filter list. | |
2 | * Copyright (C) 1999 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "command.h" | |
24 | #include "log.h" | |
25 | #include "memory.h" | |
26 | #include "buffer.h" | |
27 | #include "queue.h" | |
28 | #include "filter.h" | |
29 | ||
30 | #include "bgpd/bgpd.h" | |
31 | #include "bgpd/bgp_aspath.h" | |
32 | #include "bgpd/bgp_regex.h" | |
33 | #include "bgpd/bgp_filter.h" | |
34 | ||
35 | /* List of AS filter list. */ | |
36 | struct as_list_list { | |
37 | struct as_list *head; | |
38 | struct as_list *tail; | |
39 | }; | |
40 | ||
41 | /* AS path filter master. */ | |
42 | struct as_list_master { | |
43 | /* List of access_list which name is number. */ | |
44 | struct as_list_list num; | |
45 | ||
46 | /* List of access_list which name is string. */ | |
47 | struct as_list_list str; | |
48 | ||
49 | /* Hook function which is executed when new access_list is added. */ | |
50 | void (*add_hook)(char *); | |
51 | ||
52 | /* Hook function which is executed when access_list is deleted. */ | |
53 | void (*delete_hook)(const char *); | |
54 | }; | |
55 | ||
56 | /* Element of AS path filter. */ | |
57 | struct as_filter { | |
58 | struct as_filter *next; | |
59 | struct as_filter *prev; | |
60 | ||
61 | enum as_filter_type type; | |
62 | ||
63 | regex_t *reg; | |
64 | char *reg_str; | |
65 | }; | |
66 | ||
67 | /* AS path filter list. */ | |
68 | struct as_list { | |
69 | char *name; | |
70 | ||
71 | enum access_type type; | |
72 | ||
73 | struct as_list *next; | |
74 | struct as_list *prev; | |
75 | ||
76 | struct as_filter *head; | |
77 | struct as_filter *tail; | |
78 | }; | |
79 | ||
80 | /* as-path access-list 10 permit AS1. */ | |
81 | ||
82 | static struct as_list_master as_list_master = {{NULL, NULL}, | |
83 | {NULL, NULL}, | |
84 | NULL, | |
85 | NULL}; | |
86 | ||
87 | /* Allocate new AS filter. */ | |
88 | static struct as_filter *as_filter_new(void) | |
89 | { | |
90 | return XCALLOC(MTYPE_AS_FILTER, sizeof(struct as_filter)); | |
91 | } | |
92 | ||
93 | /* Free allocated AS filter. */ | |
94 | static void as_filter_free(struct as_filter *asfilter) | |
95 | { | |
96 | if (asfilter->reg) | |
97 | bgp_regex_free(asfilter->reg); | |
98 | if (asfilter->reg_str) | |
99 | XFREE(MTYPE_AS_FILTER_STR, asfilter->reg_str); | |
100 | XFREE(MTYPE_AS_FILTER, asfilter); | |
101 | } | |
102 | ||
103 | /* Make new AS filter. */ | |
104 | static struct as_filter *as_filter_make(regex_t *reg, const char *reg_str, | |
105 | enum as_filter_type type) | |
106 | { | |
107 | struct as_filter *asfilter; | |
108 | ||
109 | asfilter = as_filter_new(); | |
110 | asfilter->reg = reg; | |
111 | asfilter->type = type; | |
112 | asfilter->reg_str = XSTRDUP(MTYPE_AS_FILTER_STR, reg_str); | |
113 | ||
114 | return asfilter; | |
115 | } | |
116 | ||
117 | static struct as_filter *as_filter_lookup(struct as_list *aslist, | |
118 | const char *reg_str, | |
119 | enum as_filter_type type) | |
120 | { | |
121 | struct as_filter *asfilter; | |
122 | ||
123 | for (asfilter = aslist->head; asfilter; asfilter = asfilter->next) | |
124 | if (strcmp(reg_str, asfilter->reg_str) == 0) | |
125 | return asfilter; | |
126 | return NULL; | |
127 | } | |
128 | ||
129 | static void as_list_filter_add(struct as_list *aslist, | |
130 | struct as_filter *asfilter) | |
131 | { | |
132 | asfilter->next = NULL; | |
133 | asfilter->prev = aslist->tail; | |
134 | ||
135 | if (aslist->tail) | |
136 | aslist->tail->next = asfilter; | |
137 | else | |
138 | aslist->head = asfilter; | |
139 | aslist->tail = asfilter; | |
140 | ||
141 | /* Run hook function. */ | |
142 | if (as_list_master.add_hook) | |
143 | (*as_list_master.add_hook)(aslist->name); | |
144 | } | |
145 | ||
146 | /* Lookup as_list from list of as_list by name. */ | |
147 | struct as_list *as_list_lookup(const char *name) | |
148 | { | |
149 | struct as_list *aslist; | |
150 | ||
151 | if (name == NULL) | |
152 | return NULL; | |
153 | ||
154 | for (aslist = as_list_master.num.head; aslist; aslist = aslist->next) | |
155 | if (strcmp(aslist->name, name) == 0) | |
156 | return aslist; | |
157 | ||
158 | for (aslist = as_list_master.str.head; aslist; aslist = aslist->next) | |
159 | if (strcmp(aslist->name, name) == 0) | |
160 | return aslist; | |
161 | ||
162 | return NULL; | |
163 | } | |
164 | ||
165 | static struct as_list *as_list_new(void) | |
166 | { | |
167 | return XCALLOC(MTYPE_AS_LIST, sizeof(struct as_list)); | |
168 | } | |
169 | ||
170 | static void as_list_free(struct as_list *aslist) | |
171 | { | |
172 | if (aslist->name) { | |
173 | XFREE(MTYPE_AS_STR, aslist->name); | |
174 | aslist->name = NULL; | |
175 | } | |
176 | XFREE(MTYPE_AS_LIST, aslist); | |
177 | } | |
178 | ||
179 | /* Insert new AS list to list of as_list. Each as_list is sorted by | |
180 | the name. */ | |
181 | static struct as_list *as_list_insert(const char *name) | |
182 | { | |
183 | size_t i; | |
184 | long number; | |
185 | struct as_list *aslist; | |
186 | struct as_list *point; | |
187 | struct as_list_list *list; | |
188 | ||
189 | /* Allocate new access_list and copy given name. */ | |
190 | aslist = as_list_new(); | |
191 | aslist->name = XSTRDUP(MTYPE_AS_STR, name); | |
192 | assert(aslist->name); | |
193 | ||
194 | /* If name is made by all digit character. We treat it as | |
195 | number. */ | |
196 | for (number = 0, i = 0; i < strlen(name); i++) { | |
197 | if (isdigit((int)name[i])) | |
198 | number = (number * 10) + (name[i] - '0'); | |
199 | else | |
200 | break; | |
201 | } | |
202 | ||
203 | /* In case of name is all digit character */ | |
204 | if (i == strlen(name)) { | |
205 | aslist->type = ACCESS_TYPE_NUMBER; | |
206 | ||
207 | /* Set access_list to number list. */ | |
208 | list = &as_list_master.num; | |
209 | ||
210 | for (point = list->head; point; point = point->next) | |
211 | if (atol(point->name) >= number) | |
212 | break; | |
213 | } else { | |
214 | aslist->type = ACCESS_TYPE_STRING; | |
215 | ||
216 | /* Set access_list to string list. */ | |
217 | list = &as_list_master.str; | |
218 | ||
219 | /* Set point to insertion point. */ | |
220 | for (point = list->head; point; point = point->next) | |
221 | if (strcmp(point->name, name) >= 0) | |
222 | break; | |
223 | } | |
224 | ||
225 | /* In case of this is the first element of master. */ | |
226 | if (list->head == NULL) { | |
227 | list->head = list->tail = aslist; | |
228 | return aslist; | |
229 | } | |
230 | ||
231 | /* In case of insertion is made at the tail of access_list. */ | |
232 | if (point == NULL) { | |
233 | aslist->prev = list->tail; | |
234 | list->tail->next = aslist; | |
235 | list->tail = aslist; | |
236 | return aslist; | |
237 | } | |
238 | ||
239 | /* In case of insertion is made at the head of access_list. */ | |
240 | if (point == list->head) { | |
241 | aslist->next = list->head; | |
242 | list->head->prev = aslist; | |
243 | list->head = aslist; | |
244 | return aslist; | |
245 | } | |
246 | ||
247 | /* Insertion is made at middle of the access_list. */ | |
248 | aslist->next = point; | |
249 | aslist->prev = point->prev; | |
250 | ||
251 | if (point->prev) | |
252 | point->prev->next = aslist; | |
253 | point->prev = aslist; | |
254 | ||
255 | return aslist; | |
256 | } | |
257 | ||
258 | static struct as_list *as_list_get(const char *name) | |
259 | { | |
260 | struct as_list *aslist; | |
261 | ||
262 | aslist = as_list_lookup(name); | |
263 | if (aslist == NULL) | |
264 | aslist = as_list_insert(name); | |
265 | ||
266 | return aslist; | |
267 | } | |
268 | ||
269 | static const char *filter_type_str(enum as_filter_type type) | |
270 | { | |
271 | switch (type) { | |
272 | case AS_FILTER_PERMIT: | |
273 | return "permit"; | |
274 | case AS_FILTER_DENY: | |
275 | return "deny"; | |
276 | default: | |
277 | return ""; | |
278 | } | |
279 | } | |
280 | ||
281 | static void as_list_delete(struct as_list *aslist) | |
282 | { | |
283 | struct as_list_list *list; | |
284 | struct as_filter *filter, *next; | |
285 | ||
286 | for (filter = aslist->head; filter; filter = next) { | |
287 | next = filter->next; | |
288 | as_filter_free(filter); | |
289 | } | |
290 | ||
291 | if (aslist->type == ACCESS_TYPE_NUMBER) | |
292 | list = &as_list_master.num; | |
293 | else | |
294 | list = &as_list_master.str; | |
295 | ||
296 | if (aslist->next) | |
297 | aslist->next->prev = aslist->prev; | |
298 | else | |
299 | list->tail = aslist->prev; | |
300 | ||
301 | if (aslist->prev) | |
302 | aslist->prev->next = aslist->next; | |
303 | else | |
304 | list->head = aslist->next; | |
305 | ||
306 | as_list_free(aslist); | |
307 | } | |
308 | ||
309 | static int as_list_empty(struct as_list *aslist) | |
310 | { | |
311 | if (aslist->head == NULL && aslist->tail == NULL) | |
312 | return 1; | |
313 | else | |
314 | return 0; | |
315 | } | |
316 | ||
317 | static void as_list_filter_delete(struct as_list *aslist, | |
318 | struct as_filter *asfilter) | |
319 | { | |
320 | char *name = XSTRDUP(MTYPE_AS_STR, aslist->name); | |
321 | ||
322 | if (asfilter->next) | |
323 | asfilter->next->prev = asfilter->prev; | |
324 | else | |
325 | aslist->tail = asfilter->prev; | |
326 | ||
327 | if (asfilter->prev) | |
328 | asfilter->prev->next = asfilter->next; | |
329 | else | |
330 | aslist->head = asfilter->next; | |
331 | ||
332 | as_filter_free(asfilter); | |
333 | ||
334 | /* If access_list becomes empty delete it from access_master. */ | |
335 | if (as_list_empty(aslist)) | |
336 | as_list_delete(aslist); | |
337 | ||
338 | /* Run hook function. */ | |
339 | if (as_list_master.delete_hook) | |
340 | (*as_list_master.delete_hook)(name); | |
341 | if (name) | |
342 | XFREE(MTYPE_AS_STR, name); | |
343 | } | |
344 | ||
345 | static int as_filter_match(struct as_filter *asfilter, struct aspath *aspath) | |
346 | { | |
347 | if (bgp_regexec(asfilter->reg, aspath) != REG_NOMATCH) | |
348 | return 1; | |
349 | return 0; | |
350 | } | |
351 | ||
352 | /* Apply AS path filter to AS. */ | |
353 | enum as_filter_type as_list_apply(struct as_list *aslist, void *object) | |
354 | { | |
355 | struct as_filter *asfilter; | |
356 | struct aspath *aspath; | |
357 | ||
358 | aspath = (struct aspath *)object; | |
359 | ||
360 | if (aslist == NULL) | |
361 | return AS_FILTER_DENY; | |
362 | ||
363 | for (asfilter = aslist->head; asfilter; asfilter = asfilter->next) { | |
364 | if (as_filter_match(asfilter, aspath)) | |
365 | return asfilter->type; | |
366 | } | |
367 | return AS_FILTER_DENY; | |
368 | } | |
369 | ||
370 | /* Add hook function. */ | |
371 | void as_list_add_hook(void (*func)(char *)) | |
372 | { | |
373 | as_list_master.add_hook = func; | |
374 | } | |
375 | ||
376 | /* Delete hook function. */ | |
377 | void as_list_delete_hook(void (*func)(const char *)) | |
378 | { | |
379 | as_list_master.delete_hook = func; | |
380 | } | |
381 | ||
382 | static int as_list_dup_check(struct as_list *aslist, struct as_filter *new) | |
383 | { | |
384 | struct as_filter *asfilter; | |
385 | ||
386 | for (asfilter = aslist->head; asfilter; asfilter = asfilter->next) { | |
387 | if (asfilter->type == new->type | |
388 | && strcmp(asfilter->reg_str, new->reg_str) == 0) | |
389 | return 1; | |
390 | } | |
391 | return 0; | |
392 | } | |
393 | ||
394 | static int config_bgp_aspath_validate(const char *regstr) | |
395 | { | |
396 | char valid_chars[] = "1234567890_^|[,{}() ]$*+.?-"; | |
397 | ||
398 | if (strspn(regstr, valid_chars) == strlen(regstr)) | |
399 | return 1; | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | DEFUN(as_path, bgp_as_path_cmd, | |
405 | "bgp as-path access-list WORD <deny|permit> LINE...", | |
406 | BGP_STR | |
407 | "BGP autonomous system path filter\n" | |
408 | "Specify an access list name\n" | |
409 | "Regular expression access list name\n" | |
410 | "Specify packets to reject\n" | |
411 | "Specify packets to forward\n" | |
412 | "A regular-expression (1234567890_(^|[,{}() ]|$)) to match the BGP AS paths\n") | |
413 | { | |
414 | int idx = 0; | |
415 | enum as_filter_type type; | |
416 | struct as_filter *asfilter; | |
417 | struct as_list *aslist; | |
418 | regex_t *regex; | |
419 | char *regstr; | |
420 | ||
421 | if (argv_find(argv, argc, "ip", &idx)) { | |
422 | vty_out(vty, "This config option is deprecated and is scheduled for removal.\n"); | |
423 | vty_out(vty, "if you are using this please migrate to the below command\n"); | |
424 | vty_out(vty, "'bgp as-path access-list WORD <deny|permit> LINE'\n"); | |
425 | zlog_warn("Deprecated option: 'ip as-path access-list WORD <deny|permit> LINE' being used"); | |
426 | } | |
427 | ||
428 | /* Retrieve access list name */ | |
429 | argv_find(argv, argc, "WORD", &idx); | |
430 | char *alname = argv[idx]->arg; | |
431 | ||
432 | /* Check the filter type. */ | |
433 | type = argv_find(argv, argc, "deny", &idx) ? AS_FILTER_DENY | |
434 | : AS_FILTER_PERMIT; | |
435 | ||
436 | /* Check AS path regex. */ | |
437 | argv_find(argv, argc, "LINE", &idx); | |
438 | regstr = argv_concat(argv, argc, idx); | |
439 | ||
440 | regex = bgp_regcomp(regstr); | |
441 | if (!regex) { | |
442 | vty_out(vty, "can't compile regexp %s\n", regstr); | |
443 | XFREE(MTYPE_TMP, regstr); | |
444 | return CMD_WARNING_CONFIG_FAILED; | |
445 | } | |
446 | ||
447 | if (!config_bgp_aspath_validate(regstr)) { | |
448 | vty_out(vty, "Invalid character in as-path access-list %s\n", | |
449 | regstr); | |
450 | return CMD_WARNING_CONFIG_FAILED; | |
451 | } | |
452 | ||
453 | asfilter = as_filter_make(regex, regstr, type); | |
454 | ||
455 | XFREE(MTYPE_TMP, regstr); | |
456 | ||
457 | /* Install new filter to the access_list. */ | |
458 | aslist = as_list_get(alname); | |
459 | ||
460 | /* Duplicate insertion check. */; | |
461 | if (as_list_dup_check(aslist, asfilter)) | |
462 | as_filter_free(asfilter); | |
463 | else | |
464 | as_list_filter_add(aslist, asfilter); | |
465 | ||
466 | return CMD_SUCCESS; | |
467 | } | |
468 | ||
469 | #if CONFDATE > 20191005 | |
470 | CPP_NOTICE("bgpd: remove deprecated 'ip as-path access-list WORD <deny|permit> LINE' command") | |
471 | #endif | |
472 | ALIAS(as_path, ip_as_path_cmd, | |
473 | "ip as-path access-list WORD <deny|permit> LINE...", | |
474 | IP_STR | |
475 | "BGP autonomous system path filter\n" | |
476 | "Specify an access list name\n" | |
477 | "Regular expression access list name\n" | |
478 | "Specify packets to reject\n" | |
479 | "Specify packets to forward\n" | |
480 | "A regular-expression (1234567890_(^|[,{}() ]|$)) to match the BGP AS paths\n") | |
481 | ||
482 | DEFUN(no_as_path, no_bgp_as_path_cmd, | |
483 | "no bgp as-path access-list WORD <deny|permit> LINE...", | |
484 | NO_STR | |
485 | BGP_STR | |
486 | "BGP autonomous system path filter\n" | |
487 | "Specify an access list name\n" | |
488 | "Regular expression access list name\n" | |
489 | "Specify packets to reject\n" | |
490 | "Specify packets to forward\n" | |
491 | "A regular-expression (1234567890_(^|[,{}() ]|$)) to match the BGP AS paths\n") | |
492 | { | |
493 | int idx = 0; | |
494 | enum as_filter_type type; | |
495 | struct as_filter *asfilter; | |
496 | struct as_list *aslist; | |
497 | char *regstr; | |
498 | regex_t *regex; | |
499 | ||
500 | if (argv_find(argv, argc, "ip", &idx)) { | |
501 | vty_out(vty, "This config option is deprecated, and is scheduled for removal.\n"); | |
502 | vty_out(vty, "if you are using this please migrate to the below command\n"); | |
503 | vty_out(vty, "'no bgp as-path access-list WORD <deny|permit> LINE'\n"); | |
504 | zlog_warn("Deprecated option: 'no ip as-path access-list WORD <deny|permit> LINE' being used"); | |
505 | } | |
506 | char *aslistname = | |
507 | argv_find(argv, argc, "WORD", &idx) ? argv[idx]->arg : NULL; | |
508 | ||
509 | /* Lookup AS list from AS path list. */ | |
510 | aslist = as_list_lookup(aslistname); | |
511 | if (aslist == NULL) { | |
512 | vty_out(vty, "bgp as-path access-list %s doesn't exist\n", | |
513 | aslistname); | |
514 | return CMD_WARNING_CONFIG_FAILED; | |
515 | } | |
516 | ||
517 | /* Check the filter type. */ | |
518 | if (argv_find(argv, argc, "permit", &idx)) | |
519 | type = AS_FILTER_PERMIT; | |
520 | else if (argv_find(argv, argc, "deny", &idx)) | |
521 | type = AS_FILTER_DENY; | |
522 | else { | |
523 | vty_out(vty, "filter type must be [permit|deny]\n"); | |
524 | return CMD_WARNING_CONFIG_FAILED; | |
525 | } | |
526 | ||
527 | /* Compile AS path. */ | |
528 | argv_find(argv, argc, "LINE", &idx); | |
529 | regstr = argv_concat(argv, argc, idx); | |
530 | ||
531 | if (!config_bgp_aspath_validate(regstr)) { | |
532 | vty_out(vty, "Invalid character in as-path access-list %s\n", | |
533 | regstr); | |
534 | return CMD_WARNING_CONFIG_FAILED; | |
535 | } | |
536 | ||
537 | regex = bgp_regcomp(regstr); | |
538 | if (!regex) { | |
539 | vty_out(vty, "can't compile regexp %s\n", regstr); | |
540 | XFREE(MTYPE_TMP, regstr); | |
541 | return CMD_WARNING_CONFIG_FAILED; | |
542 | } | |
543 | ||
544 | /* Lookup asfilter. */ | |
545 | asfilter = as_filter_lookup(aslist, regstr, type); | |
546 | ||
547 | XFREE(MTYPE_TMP, regstr); | |
548 | bgp_regex_free(regex); | |
549 | ||
550 | if (asfilter == NULL) { | |
551 | vty_out(vty, "\n"); | |
552 | return CMD_WARNING_CONFIG_FAILED; | |
553 | } | |
554 | ||
555 | as_list_filter_delete(aslist, asfilter); | |
556 | ||
557 | return CMD_SUCCESS; | |
558 | } | |
559 | ||
560 | ALIAS(no_as_path, no_ip_as_path_cmd, | |
561 | "no ip as-path access-list WORD <deny|permit> LINE...", | |
562 | NO_STR IP_STR | |
563 | "BGP autonomous system path filter\n" | |
564 | "Specify an access list name\n" | |
565 | "Regular expression access list name\n" | |
566 | "Specify packets to reject\n" | |
567 | "Specify packets to forward\n" | |
568 | "A regular-expression (1234567890_(^|[,{}() ]|$)) to match the BGP AS paths\n") | |
569 | ||
570 | DEFUN (no_as_path_all, | |
571 | no_bgp_as_path_all_cmd, | |
572 | "no bgp as-path access-list WORD", | |
573 | NO_STR | |
574 | BGP_STR | |
575 | "BGP autonomous system path filter\n" | |
576 | "Specify an access list name\n" | |
577 | "Regular expression access list name\n") | |
578 | { | |
579 | int idx_word = 4; | |
580 | struct as_list *aslist; | |
581 | int idx = 0; | |
582 | ||
583 | if (argv_find(argv, argc, "ip", &idx)) { | |
584 | vty_out(vty, "This config option is deprecated, and is scheduled for removal.\n"); | |
585 | vty_out(vty, "if you are using this please migrate to the below command\n"); | |
586 | vty_out(vty, "'no bgp as-path access-list WORD'\n"); | |
587 | zlog_warn("Deprecated option: `no ip as-path access-list WORD` being used"); | |
588 | } | |
589 | ||
590 | aslist = as_list_lookup(argv[idx_word]->arg); | |
591 | if (aslist == NULL) { | |
592 | vty_out(vty, "bgp as-path access-list %s doesn't exist\n", | |
593 | argv[idx_word]->arg); | |
594 | return CMD_WARNING_CONFIG_FAILED; | |
595 | } | |
596 | ||
597 | as_list_delete(aslist); | |
598 | ||
599 | /* Run hook function. */ | |
600 | if (as_list_master.delete_hook) | |
601 | (*as_list_master.delete_hook)(argv[idx_word]->arg); | |
602 | ||
603 | return CMD_SUCCESS; | |
604 | } | |
605 | ||
606 | ALIAS (no_as_path_all, | |
607 | no_ip_as_path_all_cmd, | |
608 | "no ip as-path access-list WORD", | |
609 | NO_STR | |
610 | IP_STR | |
611 | "BGP autonomous system path filter\n" | |
612 | "Specify an access list name\n" | |
613 | "Regular expression access list name\n") | |
614 | ||
615 | static void as_list_show(struct vty *vty, struct as_list *aslist) | |
616 | { | |
617 | struct as_filter *asfilter; | |
618 | ||
619 | vty_out(vty, "AS path access list %s\n", aslist->name); | |
620 | ||
621 | for (asfilter = aslist->head; asfilter; asfilter = asfilter->next) { | |
622 | vty_out(vty, " %s %s\n", filter_type_str(asfilter->type), | |
623 | asfilter->reg_str); | |
624 | } | |
625 | } | |
626 | ||
627 | static void as_list_show_all(struct vty *vty) | |
628 | { | |
629 | struct as_list *aslist; | |
630 | struct as_filter *asfilter; | |
631 | ||
632 | for (aslist = as_list_master.num.head; aslist; aslist = aslist->next) { | |
633 | vty_out(vty, "AS path access list %s\n", aslist->name); | |
634 | ||
635 | for (asfilter = aslist->head; asfilter; | |
636 | asfilter = asfilter->next) { | |
637 | vty_out(vty, " %s %s\n", | |
638 | filter_type_str(asfilter->type), | |
639 | asfilter->reg_str); | |
640 | } | |
641 | } | |
642 | ||
643 | for (aslist = as_list_master.str.head; aslist; aslist = aslist->next) { | |
644 | vty_out(vty, "AS path access list %s\n", aslist->name); | |
645 | ||
646 | for (asfilter = aslist->head; asfilter; | |
647 | asfilter = asfilter->next) { | |
648 | vty_out(vty, " %s %s\n", | |
649 | filter_type_str(asfilter->type), | |
650 | asfilter->reg_str); | |
651 | } | |
652 | } | |
653 | } | |
654 | ||
655 | DEFUN (show_as_path_access_list, | |
656 | show_bgp_as_path_access_list_cmd, | |
657 | "show bgp as-path-access-list WORD", | |
658 | SHOW_STR | |
659 | BGP_STR | |
660 | "List AS path access lists\n" | |
661 | "AS path access list name\n") | |
662 | { | |
663 | int idx_word = 3; | |
664 | struct as_list *aslist; | |
665 | int idx = 0; | |
666 | ||
667 | if (argv_find(argv, argc, "ip", &idx)) { | |
668 | vty_out(vty, "This config option is deprecated, and is scheduled for removal.\n"); | |
669 | vty_out(vty, "if you are using this please migrate to the below command\n"); | |
670 | vty_out(vty, "'show bgp as-path-access-list WORD'\n"); | |
671 | zlog_warn("Deprecated option: 'show ip as-path-access-list WORD' being used"); | |
672 | } | |
673 | aslist = as_list_lookup(argv[idx_word]->arg); | |
674 | if (aslist) | |
675 | as_list_show(vty, aslist); | |
676 | ||
677 | return CMD_SUCCESS; | |
678 | } | |
679 | ||
680 | ALIAS (show_as_path_access_list, | |
681 | show_ip_as_path_access_list_cmd, | |
682 | "show ip as-path-access-list WORD", | |
683 | SHOW_STR | |
684 | IP_STR | |
685 | "List AS path access lists\n" | |
686 | "AS path access list name\n") | |
687 | ||
688 | DEFUN (show_as_path_access_list_all, | |
689 | show_bgp_as_path_access_list_all_cmd, | |
690 | "show bgp as-path-access-list", | |
691 | SHOW_STR | |
692 | BGP_STR | |
693 | "List AS path access lists\n") | |
694 | { | |
695 | int idx = 0; | |
696 | ||
697 | if (argv_find(argv, argc, "ip", &idx)) { | |
698 | vty_out(vty, "This config option is deprecated, and is scheduled for removal.\n"); | |
699 | vty_out(vty, "if you are using this please migrate to the below command\n"); | |
700 | vty_out(vty, "'show bgp as-path-access-list'\n"); | |
701 | zlog_warn("Deprecated option: 'show ip as-path-access-list' being used"); | |
702 | } | |
703 | as_list_show_all(vty); | |
704 | return CMD_SUCCESS; | |
705 | } | |
706 | ||
707 | ALIAS (show_as_path_access_list_all, | |
708 | show_ip_as_path_access_list_all_cmd, | |
709 | "show ip as-path-access-list", | |
710 | SHOW_STR | |
711 | IP_STR | |
712 | "List AS path access lists\n") | |
713 | ||
714 | static int config_write_as_list(struct vty *vty) | |
715 | { | |
716 | struct as_list *aslist; | |
717 | struct as_filter *asfilter; | |
718 | int write = 0; | |
719 | ||
720 | for (aslist = as_list_master.num.head; aslist; aslist = aslist->next) | |
721 | for (asfilter = aslist->head; asfilter; | |
722 | asfilter = asfilter->next) { | |
723 | vty_out(vty, "bgp as-path access-list %s %s %s\n", | |
724 | aslist->name, filter_type_str(asfilter->type), | |
725 | asfilter->reg_str); | |
726 | write++; | |
727 | } | |
728 | ||
729 | for (aslist = as_list_master.str.head; aslist; aslist = aslist->next) | |
730 | for (asfilter = aslist->head; asfilter; | |
731 | asfilter = asfilter->next) { | |
732 | vty_out(vty, "bgp as-path access-list %s %s %s\n", | |
733 | aslist->name, filter_type_str(asfilter->type), | |
734 | asfilter->reg_str); | |
735 | write++; | |
736 | } | |
737 | return write; | |
738 | } | |
739 | ||
740 | static struct cmd_node as_list_node = {AS_LIST_NODE, "", 1}; | |
741 | ||
742 | /* Register functions. */ | |
743 | void bgp_filter_init(void) | |
744 | { | |
745 | install_node(&as_list_node, config_write_as_list); | |
746 | ||
747 | install_element(CONFIG_NODE, &bgp_as_path_cmd); | |
748 | install_element(CONFIG_NODE, &ip_as_path_cmd); | |
749 | install_element(CONFIG_NODE, &no_bgp_as_path_cmd); | |
750 | install_element(CONFIG_NODE, &no_ip_as_path_cmd); | |
751 | install_element(CONFIG_NODE, &no_bgp_as_path_all_cmd); | |
752 | install_element(CONFIG_NODE, &no_ip_as_path_all_cmd); | |
753 | ||
754 | install_element(VIEW_NODE, &show_bgp_as_path_access_list_cmd); | |
755 | install_element(VIEW_NODE, &show_ip_as_path_access_list_cmd); | |
756 | install_element(VIEW_NODE, &show_bgp_as_path_access_list_all_cmd); | |
757 | install_element(VIEW_NODE, &show_ip_as_path_access_list_all_cmd); | |
758 | } | |
759 | ||
760 | void bgp_filter_reset(void) | |
761 | { | |
762 | struct as_list *aslist; | |
763 | struct as_list *next; | |
764 | ||
765 | for (aslist = as_list_master.num.head; aslist; aslist = next) { | |
766 | next = aslist->next; | |
767 | as_list_delete(aslist); | |
768 | } | |
769 | ||
770 | for (aslist = as_list_master.str.head; aslist; aslist = next) { | |
771 | next = aslist->next; | |
772 | as_list_delete(aslist); | |
773 | } | |
774 | ||
775 | assert(as_list_master.num.head == NULL); | |
776 | assert(as_list_master.num.tail == NULL); | |
777 | ||
778 | assert(as_list_master.str.head == NULL); | |
779 | assert(as_list_master.str.tail == NULL); | |
780 | } |