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Commit | Line | Data |
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718e3744 | 1 | /* AS path filter list. |
896014f4 DL |
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 | */ | |
718e3744 | 20 | |
21 | #include <zebra.h> | |
22 | ||
23 | #include "command.h" | |
24 | #include "log.h" | |
25 | #include "memory.h" | |
26 | #include "buffer.h" | |
3f9c7369 | 27 | #include "queue.h" |
039f3a34 | 28 | #include "filter.h" |
718e3744 | 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. */ | |
d62a17ae | 36 | struct as_list_list { |
37 | struct as_list *head; | |
38 | struct as_list *tail; | |
718e3744 | 39 | }; |
40 | ||
41 | /* AS path filter master. */ | |
d62a17ae | 42 | struct as_list_master { |
43 | /* List of access_list which name is number. */ | |
44 | struct as_list_list num; | |
718e3744 | 45 | |
d62a17ae | 46 | /* List of access_list which name is string. */ |
47 | struct as_list_list str; | |
718e3744 | 48 | |
d62a17ae | 49 | /* Hook function which is executed when new access_list is added. */ |
50 | void (*add_hook)(char *); | |
718e3744 | 51 | |
d62a17ae | 52 | /* Hook function which is executed when access_list is deleted. */ |
53 | void (*delete_hook)(const char *); | |
718e3744 | 54 | }; |
55 | ||
56 | /* Element of AS path filter. */ | |
d62a17ae | 57 | struct as_filter { |
58 | struct as_filter *next; | |
59 | struct as_filter *prev; | |
718e3744 | 60 | |
d62a17ae | 61 | enum as_filter_type type; |
718e3744 | 62 | |
d62a17ae | 63 | regex_t *reg; |
64 | char *reg_str; | |
718e3744 | 65 | }; |
66 | ||
718e3744 | 67 | /* AS path filter list. */ |
d62a17ae | 68 | struct as_list { |
69 | char *name; | |
718e3744 | 70 | |
d62a17ae | 71 | enum access_type type; |
718e3744 | 72 | |
d62a17ae | 73 | struct as_list *next; |
74 | struct as_list *prev; | |
718e3744 | 75 | |
d62a17ae | 76 | struct as_filter *head; |
77 | struct as_filter *tail; | |
718e3744 | 78 | }; |
6b0655a2 | 79 | |
7336e101 | 80 | /* as-path access-list 10 permit AS1. */ |
718e3744 | 81 | |
d62a17ae | 82 | static struct as_list_master as_list_master = {{NULL, NULL}, |
83 | {NULL, NULL}, | |
84 | NULL, | |
85 | NULL}; | |
718e3744 | 86 | |
87 | /* Allocate new AS filter. */ | |
d62a17ae | 88 | static struct as_filter *as_filter_new(void) |
718e3744 | 89 | { |
d62a17ae | 90 | return XCALLOC(MTYPE_AS_FILTER, sizeof(struct as_filter)); |
718e3744 | 91 | } |
92 | ||
93 | /* Free allocated AS filter. */ | |
d62a17ae | 94 | static void as_filter_free(struct as_filter *asfilter) |
718e3744 | 95 | { |
d62a17ae | 96 | if (asfilter->reg) |
97 | bgp_regex_free(asfilter->reg); | |
0a22ddfb | 98 | XFREE(MTYPE_AS_FILTER_STR, asfilter->reg_str); |
d62a17ae | 99 | XFREE(MTYPE_AS_FILTER, asfilter); |
718e3744 | 100 | } |
101 | ||
102 | /* Make new AS filter. */ | |
d62a17ae | 103 | static struct as_filter *as_filter_make(regex_t *reg, const char *reg_str, |
104 | enum as_filter_type type) | |
718e3744 | 105 | { |
d62a17ae | 106 | struct as_filter *asfilter; |
718e3744 | 107 | |
d62a17ae | 108 | asfilter = as_filter_new(); |
109 | asfilter->reg = reg; | |
110 | asfilter->type = type; | |
111 | asfilter->reg_str = XSTRDUP(MTYPE_AS_FILTER_STR, reg_str); | |
718e3744 | 112 | |
d62a17ae | 113 | return asfilter; |
718e3744 | 114 | } |
115 | ||
d62a17ae | 116 | static struct as_filter *as_filter_lookup(struct as_list *aslist, |
117 | const char *reg_str, | |
118 | enum as_filter_type type) | |
718e3744 | 119 | { |
d62a17ae | 120 | struct as_filter *asfilter; |
718e3744 | 121 | |
d62a17ae | 122 | for (asfilter = aslist->head; asfilter; asfilter = asfilter->next) |
123 | if (strcmp(reg_str, asfilter->reg_str) == 0) | |
124 | return asfilter; | |
125 | return NULL; | |
718e3744 | 126 | } |
127 | ||
d62a17ae | 128 | static void as_list_filter_add(struct as_list *aslist, |
129 | struct as_filter *asfilter) | |
718e3744 | 130 | { |
d62a17ae | 131 | asfilter->next = NULL; |
132 | asfilter->prev = aslist->tail; | |
718e3744 | 133 | |
d62a17ae | 134 | if (aslist->tail) |
135 | aslist->tail->next = asfilter; | |
136 | else | |
137 | aslist->head = asfilter; | |
138 | aslist->tail = asfilter; | |
518f0eb1 | 139 | |
d62a17ae | 140 | /* Run hook function. */ |
141 | if (as_list_master.add_hook) | |
142 | (*as_list_master.add_hook)(aslist->name); | |
718e3744 | 143 | } |
144 | ||
145 | /* Lookup as_list from list of as_list by name. */ | |
d62a17ae | 146 | struct as_list *as_list_lookup(const char *name) |
718e3744 | 147 | { |
d62a17ae | 148 | struct as_list *aslist; |
718e3744 | 149 | |
d62a17ae | 150 | if (name == NULL) |
151 | return NULL; | |
718e3744 | 152 | |
d62a17ae | 153 | for (aslist = as_list_master.num.head; aslist; aslist = aslist->next) |
154 | if (strcmp(aslist->name, name) == 0) | |
155 | return aslist; | |
718e3744 | 156 | |
d62a17ae | 157 | for (aslist = as_list_master.str.head; aslist; aslist = aslist->next) |
158 | if (strcmp(aslist->name, name) == 0) | |
159 | return aslist; | |
718e3744 | 160 | |
d62a17ae | 161 | return NULL; |
718e3744 | 162 | } |
163 | ||
d62a17ae | 164 | static struct as_list *as_list_new(void) |
718e3744 | 165 | { |
d62a17ae | 166 | return XCALLOC(MTYPE_AS_LIST, sizeof(struct as_list)); |
718e3744 | 167 | } |
168 | ||
d62a17ae | 169 | static void as_list_free(struct as_list *aslist) |
718e3744 | 170 | { |
d62a17ae | 171 | if (aslist->name) { |
172 | XFREE(MTYPE_AS_STR, aslist->name); | |
173 | aslist->name = NULL; | |
174 | } | |
175 | XFREE(MTYPE_AS_LIST, aslist); | |
718e3744 | 176 | } |
177 | ||
178 | /* Insert new AS list to list of as_list. Each as_list is sorted by | |
179 | the name. */ | |
d62a17ae | 180 | static struct as_list *as_list_insert(const char *name) |
181 | { | |
182 | size_t i; | |
183 | long number; | |
184 | struct as_list *aslist; | |
185 | struct as_list *point; | |
186 | struct as_list_list *list; | |
187 | ||
188 | /* Allocate new access_list and copy given name. */ | |
189 | aslist = as_list_new(); | |
190 | aslist->name = XSTRDUP(MTYPE_AS_STR, name); | |
191 | assert(aslist->name); | |
192 | ||
193 | /* If name is made by all digit character. We treat it as | |
194 | number. */ | |
195 | for (number = 0, i = 0; i < strlen(name); i++) { | |
fefa5e0f | 196 | if (isdigit((unsigned char)name[i])) |
d62a17ae | 197 | number = (number * 10) + (name[i] - '0'); |
198 | else | |
199 | break; | |
200 | } | |
201 | ||
202 | /* In case of name is all digit character */ | |
203 | if (i == strlen(name)) { | |
204 | aslist->type = ACCESS_TYPE_NUMBER; | |
205 | ||
206 | /* Set access_list to number list. */ | |
207 | list = &as_list_master.num; | |
208 | ||
209 | for (point = list->head; point; point = point->next) | |
210 | if (atol(point->name) >= number) | |
211 | break; | |
212 | } else { | |
213 | aslist->type = ACCESS_TYPE_STRING; | |
214 | ||
215 | /* Set access_list to string list. */ | |
216 | list = &as_list_master.str; | |
217 | ||
218 | /* Set point to insertion point. */ | |
219 | for (point = list->head; point; point = point->next) | |
220 | if (strcmp(point->name, name) >= 0) | |
221 | break; | |
222 | } | |
223 | ||
224 | /* In case of this is the first element of master. */ | |
225 | if (list->head == NULL) { | |
226 | list->head = list->tail = aslist; | |
227 | return aslist; | |
228 | } | |
229 | ||
230 | /* In case of insertion is made at the tail of access_list. */ | |
231 | if (point == NULL) { | |
232 | aslist->prev = list->tail; | |
233 | list->tail->next = aslist; | |
234 | list->tail = aslist; | |
235 | return aslist; | |
236 | } | |
237 | ||
238 | /* In case of insertion is made at the head of access_list. */ | |
239 | if (point == list->head) { | |
240 | aslist->next = list->head; | |
241 | list->head->prev = aslist; | |
242 | list->head = aslist; | |
243 | return aslist; | |
244 | } | |
245 | ||
246 | /* Insertion is made at middle of the access_list. */ | |
247 | aslist->next = point; | |
248 | aslist->prev = point->prev; | |
249 | ||
250 | if (point->prev) | |
251 | point->prev->next = aslist; | |
252 | point->prev = aslist; | |
253 | ||
254 | return aslist; | |
718e3744 | 255 | } |
256 | ||
d62a17ae | 257 | static struct as_list *as_list_get(const char *name) |
718e3744 | 258 | { |
d62a17ae | 259 | struct as_list *aslist; |
718e3744 | 260 | |
d62a17ae | 261 | aslist = as_list_lookup(name); |
262 | if (aslist == NULL) | |
263 | aslist = as_list_insert(name); | |
718e3744 | 264 | |
d62a17ae | 265 | return aslist; |
718e3744 | 266 | } |
267 | ||
d62a17ae | 268 | static const char *filter_type_str(enum as_filter_type type) |
718e3744 | 269 | { |
d62a17ae | 270 | switch (type) { |
271 | case AS_FILTER_PERMIT: | |
272 | return "permit"; | |
273 | case AS_FILTER_DENY: | |
274 | return "deny"; | |
275 | default: | |
276 | return ""; | |
277 | } | |
718e3744 | 278 | } |
279 | ||
d62a17ae | 280 | static void as_list_delete(struct as_list *aslist) |
718e3744 | 281 | { |
d62a17ae | 282 | struct as_list_list *list; |
283 | struct as_filter *filter, *next; | |
284 | ||
285 | for (filter = aslist->head; filter; filter = next) { | |
286 | next = filter->next; | |
287 | as_filter_free(filter); | |
288 | } | |
289 | ||
290 | if (aslist->type == ACCESS_TYPE_NUMBER) | |
291 | list = &as_list_master.num; | |
292 | else | |
293 | list = &as_list_master.str; | |
294 | ||
295 | if (aslist->next) | |
296 | aslist->next->prev = aslist->prev; | |
297 | else | |
298 | list->tail = aslist->prev; | |
299 | ||
300 | if (aslist->prev) | |
301 | aslist->prev->next = aslist->next; | |
302 | else | |
303 | list->head = aslist->next; | |
304 | ||
305 | as_list_free(aslist); | |
718e3744 | 306 | } |
307 | ||
d62a17ae | 308 | static int as_list_empty(struct as_list *aslist) |
718e3744 | 309 | { |
d62a17ae | 310 | if (aslist->head == NULL && aslist->tail == NULL) |
311 | return 1; | |
312 | else | |
313 | return 0; | |
718e3744 | 314 | } |
315 | ||
d62a17ae | 316 | static void as_list_filter_delete(struct as_list *aslist, |
317 | struct as_filter *asfilter) | |
718e3744 | 318 | { |
d62a17ae | 319 | char *name = XSTRDUP(MTYPE_AS_STR, aslist->name); |
518f0eb1 | 320 | |
d62a17ae | 321 | if (asfilter->next) |
322 | asfilter->next->prev = asfilter->prev; | |
323 | else | |
324 | aslist->tail = asfilter->prev; | |
718e3744 | 325 | |
d62a17ae | 326 | if (asfilter->prev) |
327 | asfilter->prev->next = asfilter->next; | |
328 | else | |
329 | aslist->head = asfilter->next; | |
718e3744 | 330 | |
d62a17ae | 331 | as_filter_free(asfilter); |
718e3744 | 332 | |
d62a17ae | 333 | /* If access_list becomes empty delete it from access_master. */ |
334 | if (as_list_empty(aslist)) | |
335 | as_list_delete(aslist); | |
718e3744 | 336 | |
d62a17ae | 337 | /* Run hook function. */ |
338 | if (as_list_master.delete_hook) | |
339 | (*as_list_master.delete_hook)(name); | |
0a22ddfb | 340 | XFREE(MTYPE_AS_STR, name); |
718e3744 | 341 | } |
6b0655a2 | 342 | |
d62a17ae | 343 | static int as_filter_match(struct as_filter *asfilter, struct aspath *aspath) |
718e3744 | 344 | { |
d62a17ae | 345 | if (bgp_regexec(asfilter->reg, aspath) != REG_NOMATCH) |
346 | return 1; | |
347 | return 0; | |
718e3744 | 348 | } |
349 | ||
350 | /* Apply AS path filter to AS. */ | |
d62a17ae | 351 | enum as_filter_type as_list_apply(struct as_list *aslist, void *object) |
718e3744 | 352 | { |
d62a17ae | 353 | struct as_filter *asfilter; |
354 | struct aspath *aspath; | |
718e3744 | 355 | |
d62a17ae | 356 | aspath = (struct aspath *)object; |
718e3744 | 357 | |
d62a17ae | 358 | if (aslist == NULL) |
359 | return AS_FILTER_DENY; | |
718e3744 | 360 | |
d62a17ae | 361 | for (asfilter = aslist->head; asfilter; asfilter = asfilter->next) { |
362 | if (as_filter_match(asfilter, aspath)) | |
363 | return asfilter->type; | |
364 | } | |
365 | return AS_FILTER_DENY; | |
718e3744 | 366 | } |
367 | ||
368 | /* Add hook function. */ | |
d62a17ae | 369 | void as_list_add_hook(void (*func)(char *)) |
718e3744 | 370 | { |
d62a17ae | 371 | as_list_master.add_hook = func; |
718e3744 | 372 | } |
373 | ||
374 | /* Delete hook function. */ | |
d62a17ae | 375 | void as_list_delete_hook(void (*func)(const char *)) |
718e3744 | 376 | { |
d62a17ae | 377 | as_list_master.delete_hook = func; |
718e3744 | 378 | } |
6b0655a2 | 379 | |
d62a17ae | 380 | static int as_list_dup_check(struct as_list *aslist, struct as_filter *new) |
718e3744 | 381 | { |
d62a17ae | 382 | struct as_filter *asfilter; |
383 | ||
384 | for (asfilter = aslist->head; asfilter; asfilter = asfilter->next) { | |
385 | if (asfilter->type == new->type | |
386 | && strcmp(asfilter->reg_str, new->reg_str) == 0) | |
387 | return 1; | |
388 | } | |
389 | return 0; | |
718e3744 | 390 | } |
391 | ||
c3900853 | 392 | int config_bgp_aspath_validate(const char *regstr) |
672c2d75 | 393 | { |
da6035e9 | 394 | char valid_chars[] = "1234567890_^|[,{}() ]$*+.?-\\"; |
672c2d75 DA |
395 | |
396 | if (strspn(regstr, valid_chars) == strlen(regstr)) | |
397 | return 1; | |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
7336e101 SP |
402 | DEFUN(as_path, bgp_as_path_cmd, |
403 | "bgp as-path access-list WORD <deny|permit> LINE...", | |
404 | BGP_STR | |
672c2d75 DA |
405 | "BGP autonomous system path filter\n" |
406 | "Specify an access list name\n" | |
407 | "Regular expression access list name\n" | |
408 | "Specify packets to reject\n" | |
409 | "Specify packets to forward\n" | |
a818ea74 | 410 | "A regular-expression (1234567890_^|[,{}() ]$*+.?-\\) to match the BGP AS paths\n") |
718e3744 | 411 | { |
d62a17ae | 412 | int idx = 0; |
413 | enum as_filter_type type; | |
414 | struct as_filter *asfilter; | |
415 | struct as_list *aslist; | |
416 | regex_t *regex; | |
417 | char *regstr; | |
418 | ||
419 | /* Retrieve access list name */ | |
e991f75c VJ |
420 | argv_find(argv, argc, "WORD", &idx); |
421 | char *alname = argv[idx]->arg; | |
d62a17ae | 422 | |
423 | /* Check the filter type. */ | |
424 | type = argv_find(argv, argc, "deny", &idx) ? AS_FILTER_DENY | |
425 | : AS_FILTER_PERMIT; | |
426 | ||
427 | /* Check AS path regex. */ | |
428 | argv_find(argv, argc, "LINE", &idx); | |
429 | regstr = argv_concat(argv, argc, idx); | |
430 | ||
431 | regex = bgp_regcomp(regstr); | |
432 | if (!regex) { | |
433 | vty_out(vty, "can't compile regexp %s\n", regstr); | |
434 | XFREE(MTYPE_TMP, regstr); | |
435 | return CMD_WARNING_CONFIG_FAILED; | |
436 | } | |
437 | ||
672c2d75 DA |
438 | if (!config_bgp_aspath_validate(regstr)) { |
439 | vty_out(vty, "Invalid character in as-path access-list %s\n", | |
440 | regstr); | |
441 | return CMD_WARNING_CONFIG_FAILED; | |
442 | } | |
443 | ||
d62a17ae | 444 | asfilter = as_filter_make(regex, regstr, type); |
445 | ||
446 | XFREE(MTYPE_TMP, regstr); | |
447 | ||
448 | /* Install new filter to the access_list. */ | |
449 | aslist = as_list_get(alname); | |
450 | ||
451 | /* Duplicate insertion check. */; | |
452 | if (as_list_dup_check(aslist, asfilter)) | |
453 | as_filter_free(asfilter); | |
454 | else | |
455 | as_list_filter_add(aslist, asfilter); | |
456 | ||
457 | return CMD_SUCCESS; | |
718e3744 | 458 | } |
459 | ||
7336e101 SP |
460 | DEFUN(no_as_path, no_bgp_as_path_cmd, |
461 | "no bgp as-path access-list WORD <deny|permit> LINE...", | |
462 | NO_STR | |
463 | BGP_STR | |
672c2d75 DA |
464 | "BGP autonomous system path filter\n" |
465 | "Specify an access list name\n" | |
466 | "Regular expression access list name\n" | |
467 | "Specify packets to reject\n" | |
468 | "Specify packets to forward\n" | |
a818ea74 | 469 | "A regular-expression (1234567890_^|[,{}() ]$*+.?-\\) to match the BGP AS paths\n") |
718e3744 | 470 | { |
d62a17ae | 471 | int idx = 0; |
472 | enum as_filter_type type; | |
473 | struct as_filter *asfilter; | |
474 | struct as_list *aslist; | |
475 | char *regstr; | |
476 | regex_t *regex; | |
477 | ||
478 | char *aslistname = | |
479 | argv_find(argv, argc, "WORD", &idx) ? argv[idx]->arg : NULL; | |
480 | ||
481 | /* Lookup AS list from AS path list. */ | |
482 | aslist = as_list_lookup(aslistname); | |
483 | if (aslist == NULL) { | |
7336e101 | 484 | vty_out(vty, "bgp as-path access-list %s doesn't exist\n", |
d62a17ae | 485 | aslistname); |
486 | return CMD_WARNING_CONFIG_FAILED; | |
487 | } | |
488 | ||
489 | /* Check the filter type. */ | |
490 | if (argv_find(argv, argc, "permit", &idx)) | |
491 | type = AS_FILTER_PERMIT; | |
492 | else if (argv_find(argv, argc, "deny", &idx)) | |
493 | type = AS_FILTER_DENY; | |
494 | else { | |
495 | vty_out(vty, "filter type must be [permit|deny]\n"); | |
496 | return CMD_WARNING_CONFIG_FAILED; | |
497 | } | |
498 | ||
499 | /* Compile AS path. */ | |
500 | argv_find(argv, argc, "LINE", &idx); | |
501 | regstr = argv_concat(argv, argc, idx); | |
502 | ||
672c2d75 DA |
503 | if (!config_bgp_aspath_validate(regstr)) { |
504 | vty_out(vty, "Invalid character in as-path access-list %s\n", | |
505 | regstr); | |
506 | return CMD_WARNING_CONFIG_FAILED; | |
507 | } | |
508 | ||
d62a17ae | 509 | regex = bgp_regcomp(regstr); |
510 | if (!regex) { | |
511 | vty_out(vty, "can't compile regexp %s\n", regstr); | |
512 | XFREE(MTYPE_TMP, regstr); | |
513 | return CMD_WARNING_CONFIG_FAILED; | |
514 | } | |
515 | ||
516 | /* Lookup asfilter. */ | |
517 | asfilter = as_filter_lookup(aslist, regstr, type); | |
518 | ||
519 | XFREE(MTYPE_TMP, regstr); | |
520 | bgp_regex_free(regex); | |
521 | ||
522 | if (asfilter == NULL) { | |
523 | vty_out(vty, "\n"); | |
524 | return CMD_WARNING_CONFIG_FAILED; | |
525 | } | |
526 | ||
527 | as_list_filter_delete(aslist, asfilter); | |
528 | ||
529 | return CMD_SUCCESS; | |
718e3744 | 530 | } |
531 | ||
7336e101 SP |
532 | DEFUN (no_as_path_all, |
533 | no_bgp_as_path_all_cmd, | |
534 | "no bgp as-path access-list WORD", | |
718e3744 | 535 | NO_STR |
7336e101 | 536 | BGP_STR |
718e3744 | 537 | "BGP autonomous system path filter\n" |
538 | "Specify an access list name\n" | |
539 | "Regular expression access list name\n") | |
540 | { | |
d62a17ae | 541 | int idx_word = 4; |
542 | struct as_list *aslist; | |
718e3744 | 543 | |
d62a17ae | 544 | aslist = as_list_lookup(argv[idx_word]->arg); |
545 | if (aslist == NULL) { | |
7336e101 | 546 | vty_out(vty, "bgp as-path access-list %s doesn't exist\n", |
d62a17ae | 547 | argv[idx_word]->arg); |
548 | return CMD_WARNING_CONFIG_FAILED; | |
549 | } | |
718e3744 | 550 | |
d62a17ae | 551 | as_list_delete(aslist); |
718e3744 | 552 | |
d62a17ae | 553 | /* Run hook function. */ |
554 | if (as_list_master.delete_hook) | |
555 | (*as_list_master.delete_hook)(argv[idx_word]->arg); | |
e0701b79 | 556 | |
d62a17ae | 557 | return CMD_SUCCESS; |
718e3744 | 558 | } |
559 | ||
7336e101 SP |
560 | ALIAS (no_as_path_all, |
561 | no_ip_as_path_all_cmd, | |
562 | "no ip as-path access-list WORD", | |
563 | NO_STR | |
564 | IP_STR | |
565 | "BGP autonomous system path filter\n" | |
566 | "Specify an access list name\n" | |
567 | "Regular expression access list name\n") | |
568 | ||
d62a17ae | 569 | static void as_list_show(struct vty *vty, struct as_list *aslist) |
4f991ef0 | 570 | { |
d62a17ae | 571 | struct as_filter *asfilter; |
4f991ef0 | 572 | |
d62a17ae | 573 | vty_out(vty, "AS path access list %s\n", aslist->name); |
4f991ef0 | 574 | |
d62a17ae | 575 | for (asfilter = aslist->head; asfilter; asfilter = asfilter->next) { |
576 | vty_out(vty, " %s %s\n", filter_type_str(asfilter->type), | |
577 | asfilter->reg_str); | |
578 | } | |
4f991ef0 | 579 | } |
580 | ||
d62a17ae | 581 | static void as_list_show_all(struct vty *vty) |
4f991ef0 | 582 | { |
d62a17ae | 583 | struct as_list *aslist; |
584 | struct as_filter *asfilter; | |
4f991ef0 | 585 | |
d62a17ae | 586 | for (aslist = as_list_master.num.head; aslist; aslist = aslist->next) { |
587 | vty_out(vty, "AS path access list %s\n", aslist->name); | |
4f991ef0 | 588 | |
d62a17ae | 589 | for (asfilter = aslist->head; asfilter; |
590 | asfilter = asfilter->next) { | |
591 | vty_out(vty, " %s %s\n", | |
592 | filter_type_str(asfilter->type), | |
593 | asfilter->reg_str); | |
594 | } | |
4f991ef0 | 595 | } |
4f991ef0 | 596 | |
d62a17ae | 597 | for (aslist = as_list_master.str.head; aslist; aslist = aslist->next) { |
598 | vty_out(vty, "AS path access list %s\n", aslist->name); | |
4f991ef0 | 599 | |
d62a17ae | 600 | for (asfilter = aslist->head; asfilter; |
601 | asfilter = asfilter->next) { | |
602 | vty_out(vty, " %s %s\n", | |
603 | filter_type_str(asfilter->type), | |
604 | asfilter->reg_str); | |
605 | } | |
4f991ef0 | 606 | } |
4f991ef0 | 607 | } |
608 | ||
7336e101 SP |
609 | DEFUN (show_as_path_access_list, |
610 | show_bgp_as_path_access_list_cmd, | |
611 | "show bgp as-path-access-list WORD", | |
4f991ef0 | 612 | SHOW_STR |
7336e101 | 613 | BGP_STR |
4f991ef0 | 614 | "List AS path access lists\n" |
615 | "AS path access list name\n") | |
616 | { | |
d62a17ae | 617 | int idx_word = 3; |
618 | struct as_list *aslist; | |
4f991ef0 | 619 | |
d62a17ae | 620 | aslist = as_list_lookup(argv[idx_word]->arg); |
621 | if (aslist) | |
622 | as_list_show(vty, aslist); | |
4f991ef0 | 623 | |
d62a17ae | 624 | return CMD_SUCCESS; |
4f991ef0 | 625 | } |
626 | ||
7336e101 SP |
627 | ALIAS (show_as_path_access_list, |
628 | show_ip_as_path_access_list_cmd, | |
629 | "show ip as-path-access-list WORD", | |
4f991ef0 | 630 | SHOW_STR |
631 | IP_STR | |
7336e101 SP |
632 | "List AS path access lists\n" |
633 | "AS path access list name\n") | |
634 | ||
635 | DEFUN (show_as_path_access_list_all, | |
636 | show_bgp_as_path_access_list_all_cmd, | |
637 | "show bgp as-path-access-list", | |
638 | SHOW_STR | |
639 | BGP_STR | |
4f991ef0 | 640 | "List AS path access lists\n") |
641 | { | |
d62a17ae | 642 | as_list_show_all(vty); |
643 | return CMD_SUCCESS; | |
4f991ef0 | 644 | } |
645 | ||
7336e101 SP |
646 | ALIAS (show_as_path_access_list_all, |
647 | show_ip_as_path_access_list_all_cmd, | |
648 | "show ip as-path-access-list", | |
649 | SHOW_STR | |
650 | IP_STR | |
651 | "List AS path access lists\n") | |
652 | ||
d62a17ae | 653 | static int config_write_as_list(struct vty *vty) |
654 | { | |
655 | struct as_list *aslist; | |
656 | struct as_filter *asfilter; | |
657 | int write = 0; | |
658 | ||
659 | for (aslist = as_list_master.num.head; aslist; aslist = aslist->next) | |
660 | for (asfilter = aslist->head; asfilter; | |
661 | asfilter = asfilter->next) { | |
7336e101 | 662 | vty_out(vty, "bgp as-path access-list %s %s %s\n", |
d62a17ae | 663 | aslist->name, filter_type_str(asfilter->type), |
664 | asfilter->reg_str); | |
665 | write++; | |
666 | } | |
667 | ||
668 | for (aslist = as_list_master.str.head; aslist; aslist = aslist->next) | |
669 | for (asfilter = aslist->head; asfilter; | |
670 | asfilter = asfilter->next) { | |
7336e101 | 671 | vty_out(vty, "bgp as-path access-list %s %s %s\n", |
d62a17ae | 672 | aslist->name, filter_type_str(asfilter->type), |
673 | asfilter->reg_str); | |
674 | write++; | |
675 | } | |
676 | return write; | |
718e3744 | 677 | } |
678 | ||
d62a17ae | 679 | static struct cmd_node as_list_node = {AS_LIST_NODE, "", 1}; |
718e3744 | 680 | |
681 | /* Register functions. */ | |
d62a17ae | 682 | void bgp_filter_init(void) |
718e3744 | 683 | { |
d62a17ae | 684 | install_node(&as_list_node, config_write_as_list); |
718e3744 | 685 | |
7336e101 | 686 | install_element(CONFIG_NODE, &bgp_as_path_cmd); |
7336e101 | 687 | install_element(CONFIG_NODE, &no_bgp_as_path_cmd); |
7336e101 | 688 | install_element(CONFIG_NODE, &no_bgp_as_path_all_cmd); |
d62a17ae | 689 | install_element(CONFIG_NODE, &no_ip_as_path_all_cmd); |
4f991ef0 | 690 | |
7336e101 | 691 | install_element(VIEW_NODE, &show_bgp_as_path_access_list_cmd); |
d62a17ae | 692 | install_element(VIEW_NODE, &show_ip_as_path_access_list_cmd); |
7336e101 | 693 | install_element(VIEW_NODE, &show_bgp_as_path_access_list_all_cmd); |
d62a17ae | 694 | install_element(VIEW_NODE, &show_ip_as_path_access_list_all_cmd); |
718e3744 | 695 | } |
228da428 | 696 | |
d62a17ae | 697 | void bgp_filter_reset(void) |
228da428 | 698 | { |
d62a17ae | 699 | struct as_list *aslist; |
700 | struct as_list *next; | |
701 | ||
702 | for (aslist = as_list_master.num.head; aslist; aslist = next) { | |
703 | next = aslist->next; | |
704 | as_list_delete(aslist); | |
705 | } | |
706 | ||
707 | for (aslist = as_list_master.str.head; aslist; aslist = next) { | |
708 | next = aslist->next; | |
709 | as_list_delete(aslist); | |
710 | } | |
711 | ||
712 | assert(as_list_master.num.head == NULL); | |
713 | assert(as_list_master.num.tail == NULL); | |
714 | ||
715 | assert(as_list_master.str.head == NULL); | |
716 | assert(as_list_master.str.tail == NULL); | |
228da428 | 717 | } |