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1 | /* BGP Extended Communities Attribute | |
2 | * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org> | |
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 "hash.h" | |
24 | #include "memory.h" | |
25 | #include "prefix.h" | |
26 | #include "command.h" | |
27 | #include "queue.h" | |
28 | #include "filter.h" | |
29 | #include "jhash.h" | |
30 | #include "stream.h" | |
31 | ||
32 | #include "bgpd/bgpd.h" | |
33 | #include "bgpd/bgp_ecommunity.h" | |
34 | #include "bgpd/bgp_lcommunity.h" | |
35 | #include "bgpd/bgp_aspath.h" | |
36 | #include "bgpd/bgp_flowspec_private.h" | |
37 | #include "bgpd/bgp_pbr.h" | |
38 | ||
39 | /* struct used to dump the rate contained in FS set traffic-rate EC */ | |
40 | union traffic_rate { | |
41 | float rate_float; | |
42 | uint8_t rate_byte[4]; | |
43 | }; | |
44 | ||
45 | /* Hash of community attribute. */ | |
46 | static struct hash *ecomhash; | |
47 | ||
48 | /* Allocate a new ecommunities. */ | |
49 | struct ecommunity *ecommunity_new(void) | |
50 | { | |
51 | return XCALLOC(MTYPE_ECOMMUNITY, sizeof(struct ecommunity)); | |
52 | } | |
53 | ||
54 | void ecommunity_strfree(char **s) | |
55 | { | |
56 | XFREE(MTYPE_ECOMMUNITY_STR, *s); | |
57 | } | |
58 | ||
59 | /* Allocate ecommunities. */ | |
60 | void ecommunity_free(struct ecommunity **ecom) | |
61 | { | |
62 | XFREE(MTYPE_ECOMMUNITY_VAL, (*ecom)->val); | |
63 | XFREE(MTYPE_ECOMMUNITY_STR, (*ecom)->str); | |
64 | XFREE(MTYPE_ECOMMUNITY, *ecom); | |
65 | } | |
66 | ||
67 | static void ecommunity_hash_free(struct ecommunity *ecom) | |
68 | { | |
69 | ecommunity_free(&ecom); | |
70 | } | |
71 | ||
72 | ||
73 | /* Add a new Extended Communities value to Extended Communities | |
74 | Attribute structure. When the value is already exists in the | |
75 | structure, we don't add the value. Newly added value is sorted by | |
76 | numerical order. When the value is added to the structure return 1 | |
77 | else return 0. */ | |
78 | int ecommunity_add_val(struct ecommunity *ecom, struct ecommunity_val *eval) | |
79 | { | |
80 | int c; | |
81 | ||
82 | /* When this is fist value, just add it. */ | |
83 | if (ecom->val == NULL) { | |
84 | ecom->size = 1; | |
85 | ecom->val = XCALLOC(MTYPE_ECOMMUNITY_VAL, ECOMMUNITY_SIZE); | |
86 | memcpy(ecom->val, eval->val, ECOMMUNITY_SIZE); | |
87 | return 1; | |
88 | } | |
89 | ||
90 | /* If the value already exists in the structure return 0. */ | |
91 | c = 0; | |
92 | for (uint8_t *p = ecom->val; c < ecom->size; | |
93 | p += ECOMMUNITY_SIZE, c++) { | |
94 | int ret = memcmp(p, eval->val, ECOMMUNITY_SIZE); | |
95 | if (ret == 0) | |
96 | return 0; | |
97 | else if (ret > 0) | |
98 | break; | |
99 | } | |
100 | ||
101 | /* Add the value to the structure with numerical sorting. */ | |
102 | ecom->size++; | |
103 | ecom->val = XREALLOC(MTYPE_ECOMMUNITY_VAL, ecom->val, | |
104 | ecom->size * ECOMMUNITY_SIZE); | |
105 | ||
106 | memmove(ecom->val + ((c + 1) * ECOMMUNITY_SIZE), | |
107 | ecom->val + (c * ECOMMUNITY_SIZE), | |
108 | (ecom->size - 1 - c) * ECOMMUNITY_SIZE); | |
109 | memcpy(ecom->val + (c * ECOMMUNITY_SIZE), eval->val, ECOMMUNITY_SIZE); | |
110 | ||
111 | return 1; | |
112 | } | |
113 | ||
114 | /* This function takes pointer to Extended Communites strucutre then | |
115 | create a new Extended Communities structure by uniq and sort each | |
116 | Extended Communities value. */ | |
117 | struct ecommunity *ecommunity_uniq_sort(struct ecommunity *ecom) | |
118 | { | |
119 | int i; | |
120 | struct ecommunity *new; | |
121 | struct ecommunity_val *eval; | |
122 | ||
123 | if (!ecom) | |
124 | return NULL; | |
125 | ||
126 | new = ecommunity_new(); | |
127 | ||
128 | for (i = 0; i < ecom->size; i++) { | |
129 | eval = (struct ecommunity_val *)(ecom->val | |
130 | + (i * ECOMMUNITY_SIZE)); | |
131 | ecommunity_add_val(new, eval); | |
132 | } | |
133 | return new; | |
134 | } | |
135 | ||
136 | /* Parse Extended Communites Attribute in BGP packet. */ | |
137 | struct ecommunity *ecommunity_parse(uint8_t *pnt, unsigned short length) | |
138 | { | |
139 | struct ecommunity tmp; | |
140 | struct ecommunity *new; | |
141 | ||
142 | /* Length check. */ | |
143 | if (length % ECOMMUNITY_SIZE) | |
144 | return NULL; | |
145 | ||
146 | /* Prepare tmporary structure for making a new Extended Communities | |
147 | Attribute. */ | |
148 | tmp.size = length / ECOMMUNITY_SIZE; | |
149 | tmp.val = pnt; | |
150 | ||
151 | /* Create a new Extended Communities Attribute by uniq and sort each | |
152 | Extended Communities value */ | |
153 | new = ecommunity_uniq_sort(&tmp); | |
154 | ||
155 | return ecommunity_intern(new); | |
156 | } | |
157 | ||
158 | /* Duplicate the Extended Communities Attribute structure. */ | |
159 | struct ecommunity *ecommunity_dup(struct ecommunity *ecom) | |
160 | { | |
161 | struct ecommunity *new; | |
162 | ||
163 | new = XCALLOC(MTYPE_ECOMMUNITY, sizeof(struct ecommunity)); | |
164 | new->size = ecom->size; | |
165 | if (new->size) { | |
166 | new->val = XMALLOC(MTYPE_ECOMMUNITY_VAL, | |
167 | ecom->size * ECOMMUNITY_SIZE); | |
168 | memcpy(new->val, ecom->val, ecom->size * ECOMMUNITY_SIZE); | |
169 | } else | |
170 | new->val = NULL; | |
171 | return new; | |
172 | } | |
173 | ||
174 | /* Retrun string representation of communities attribute. */ | |
175 | char *ecommunity_str(struct ecommunity *ecom) | |
176 | { | |
177 | if (!ecom->str) | |
178 | ecom->str = | |
179 | ecommunity_ecom2str(ecom, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
180 | return ecom->str; | |
181 | } | |
182 | ||
183 | /* Merge two Extended Communities Attribute structure. */ | |
184 | struct ecommunity *ecommunity_merge(struct ecommunity *ecom1, | |
185 | struct ecommunity *ecom2) | |
186 | { | |
187 | if (ecom1->val) | |
188 | ecom1->val = | |
189 | XREALLOC(MTYPE_ECOMMUNITY_VAL, ecom1->val, | |
190 | (ecom1->size + ecom2->size) * ECOMMUNITY_SIZE); | |
191 | else | |
192 | ecom1->val = | |
193 | XMALLOC(MTYPE_ECOMMUNITY_VAL, | |
194 | (ecom1->size + ecom2->size) * ECOMMUNITY_SIZE); | |
195 | ||
196 | memcpy(ecom1->val + (ecom1->size * ECOMMUNITY_SIZE), ecom2->val, | |
197 | ecom2->size * ECOMMUNITY_SIZE); | |
198 | ecom1->size += ecom2->size; | |
199 | ||
200 | return ecom1; | |
201 | } | |
202 | ||
203 | /* Intern Extended Communities Attribute. */ | |
204 | struct ecommunity *ecommunity_intern(struct ecommunity *ecom) | |
205 | { | |
206 | struct ecommunity *find; | |
207 | ||
208 | assert(ecom->refcnt == 0); | |
209 | ||
210 | find = (struct ecommunity *)hash_get(ecomhash, ecom, hash_alloc_intern); | |
211 | ||
212 | if (find != ecom) | |
213 | ecommunity_free(&ecom); | |
214 | ||
215 | find->refcnt++; | |
216 | ||
217 | if (!find->str) | |
218 | find->str = | |
219 | ecommunity_ecom2str(find, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
220 | ||
221 | return find; | |
222 | } | |
223 | ||
224 | /* Unintern Extended Communities Attribute. */ | |
225 | void ecommunity_unintern(struct ecommunity **ecom) | |
226 | { | |
227 | struct ecommunity *ret; | |
228 | ||
229 | if ((*ecom)->refcnt) | |
230 | (*ecom)->refcnt--; | |
231 | ||
232 | /* Pull off from hash. */ | |
233 | if ((*ecom)->refcnt == 0) { | |
234 | /* Extended community must be in the hash. */ | |
235 | ret = (struct ecommunity *)hash_release(ecomhash, *ecom); | |
236 | assert(ret != NULL); | |
237 | ||
238 | ecommunity_free(ecom); | |
239 | } | |
240 | } | |
241 | ||
242 | /* Utinity function to make hash key. */ | |
243 | unsigned int ecommunity_hash_make(const void *arg) | |
244 | { | |
245 | const struct ecommunity *ecom = arg; | |
246 | int size = ecom->size * ECOMMUNITY_SIZE; | |
247 | ||
248 | return jhash(ecom->val, size, 0x564321ab); | |
249 | } | |
250 | ||
251 | /* Compare two Extended Communities Attribute structure. */ | |
252 | bool ecommunity_cmp(const void *arg1, const void *arg2) | |
253 | { | |
254 | const struct ecommunity *ecom1 = arg1; | |
255 | const struct ecommunity *ecom2 = arg2; | |
256 | ||
257 | if (ecom1 == NULL && ecom2 == NULL) | |
258 | return true; | |
259 | ||
260 | if (ecom1 == NULL || ecom2 == NULL) | |
261 | return false; | |
262 | ||
263 | return (ecom1->size == ecom2->size | |
264 | && memcmp(ecom1->val, ecom2->val, ecom1->size * ECOMMUNITY_SIZE) | |
265 | == 0); | |
266 | } | |
267 | ||
268 | /* Initialize Extended Comminities related hash. */ | |
269 | void ecommunity_init(void) | |
270 | { | |
271 | ecomhash = hash_create(ecommunity_hash_make, ecommunity_cmp, | |
272 | "BGP ecommunity hash"); | |
273 | } | |
274 | ||
275 | void ecommunity_finish(void) | |
276 | { | |
277 | hash_clean(ecomhash, (void (*)(void *))ecommunity_hash_free); | |
278 | hash_free(ecomhash); | |
279 | ecomhash = NULL; | |
280 | } | |
281 | ||
282 | /* Extended Communities token enum. */ | |
283 | enum ecommunity_token { | |
284 | ecommunity_token_unknown = 0, | |
285 | ecommunity_token_rt, | |
286 | ecommunity_token_soo, | |
287 | ecommunity_token_val, | |
288 | }; | |
289 | ||
290 | /* | |
291 | * Encode BGP extended community from passed values. Supports types | |
292 | * defined in RFC 4360 and well-known sub-types. | |
293 | */ | |
294 | static int ecommunity_encode(uint8_t type, uint8_t sub_type, int trans, as_t as, | |
295 | struct in_addr ip, uint32_t val, | |
296 | struct ecommunity_val *eval) | |
297 | { | |
298 | assert(eval); | |
299 | if (type == ECOMMUNITY_ENCODE_AS) { | |
300 | if (as > BGP_AS_MAX) | |
301 | return -1; | |
302 | } else if (type == ECOMMUNITY_ENCODE_IP | |
303 | || type == ECOMMUNITY_ENCODE_AS4) { | |
304 | if (val > UINT16_MAX) | |
305 | return -1; | |
306 | } | |
307 | ||
308 | /* Fill in the values. */ | |
309 | eval->val[0] = type; | |
310 | if (!trans) | |
311 | eval->val[0] |= ECOMMUNITY_FLAG_NON_TRANSITIVE; | |
312 | eval->val[1] = sub_type; | |
313 | if (type == ECOMMUNITY_ENCODE_AS) { | |
314 | eval->val[2] = (as >> 8) & 0xff; | |
315 | eval->val[3] = as & 0xff; | |
316 | eval->val[4] = (val >> 24) & 0xff; | |
317 | eval->val[5] = (val >> 16) & 0xff; | |
318 | eval->val[6] = (val >> 8) & 0xff; | |
319 | eval->val[7] = val & 0xff; | |
320 | } else if (type == ECOMMUNITY_ENCODE_IP) { | |
321 | memcpy(&eval->val[2], &ip, sizeof(struct in_addr)); | |
322 | eval->val[6] = (val >> 8) & 0xff; | |
323 | eval->val[7] = val & 0xff; | |
324 | } else { | |
325 | eval->val[2] = (as >> 24) & 0xff; | |
326 | eval->val[3] = (as >> 16) & 0xff; | |
327 | eval->val[4] = (as >> 8) & 0xff; | |
328 | eval->val[5] = as & 0xff; | |
329 | eval->val[6] = (val >> 8) & 0xff; | |
330 | eval->val[7] = val & 0xff; | |
331 | } | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
336 | /* Get next Extended Communities token from the string. */ | |
337 | static const char *ecommunity_gettoken(const char *str, | |
338 | struct ecommunity_val *eval, | |
339 | enum ecommunity_token *token) | |
340 | { | |
341 | int ret; | |
342 | int dot = 0; | |
343 | int digit = 0; | |
344 | int separator = 0; | |
345 | const char *p = str; | |
346 | char *endptr; | |
347 | struct in_addr ip; | |
348 | as_t as = 0; | |
349 | uint32_t val = 0; | |
350 | uint8_t ecomm_type; | |
351 | char buf[INET_ADDRSTRLEN + 1]; | |
352 | ||
353 | /* Skip white space. */ | |
354 | while (isspace((unsigned char)*p)) { | |
355 | p++; | |
356 | str++; | |
357 | } | |
358 | ||
359 | /* Check the end of the line. */ | |
360 | if (*p == '\0') | |
361 | return NULL; | |
362 | ||
363 | /* "rt" and "soo" keyword parse. */ | |
364 | if (!isdigit((unsigned char)*p)) { | |
365 | /* "rt" match check. */ | |
366 | if (tolower((unsigned char)*p) == 'r') { | |
367 | p++; | |
368 | if (tolower((unsigned char)*p) == 't') { | |
369 | p++; | |
370 | *token = ecommunity_token_rt; | |
371 | return p; | |
372 | } | |
373 | if (isspace((unsigned char)*p) || *p == '\0') { | |
374 | *token = ecommunity_token_rt; | |
375 | return p; | |
376 | } | |
377 | goto error; | |
378 | } | |
379 | /* "soo" match check. */ | |
380 | else if (tolower((unsigned char)*p) == 's') { | |
381 | p++; | |
382 | if (tolower((unsigned char)*p) == 'o') { | |
383 | p++; | |
384 | if (tolower((unsigned char)*p) == 'o') { | |
385 | p++; | |
386 | *token = ecommunity_token_soo; | |
387 | return p; | |
388 | } | |
389 | if (isspace((unsigned char)*p) || *p == '\0') { | |
390 | *token = ecommunity_token_soo; | |
391 | return p; | |
392 | } | |
393 | goto error; | |
394 | } | |
395 | if (isspace((unsigned char)*p) || *p == '\0') { | |
396 | *token = ecommunity_token_soo; | |
397 | return p; | |
398 | } | |
399 | goto error; | |
400 | } | |
401 | goto error; | |
402 | } | |
403 | ||
404 | /* What a mess, there are several possibilities: | |
405 | * | |
406 | * a) A.B.C.D:MN | |
407 | * b) EF:OPQR | |
408 | * c) GHJK:MN | |
409 | * | |
410 | * A.B.C.D: Four Byte IP | |
411 | * EF: Two byte ASN | |
412 | * GHJK: Four-byte ASN | |
413 | * MN: Two byte value | |
414 | * OPQR: Four byte value | |
415 | * | |
416 | */ | |
417 | while (isdigit((unsigned char)*p) || *p == ':' || *p == '.') { | |
418 | if (*p == ':') { | |
419 | if (separator) | |
420 | goto error; | |
421 | ||
422 | separator = 1; | |
423 | digit = 0; | |
424 | ||
425 | if ((p - str) > INET_ADDRSTRLEN) | |
426 | goto error; | |
427 | memset(buf, 0, INET_ADDRSTRLEN + 1); | |
428 | memcpy(buf, str, p - str); | |
429 | ||
430 | if (dot) { | |
431 | /* Parsing A.B.C.D in: | |
432 | * A.B.C.D:MN | |
433 | */ | |
434 | ret = inet_aton(buf, &ip); | |
435 | if (ret == 0) | |
436 | goto error; | |
437 | } else { | |
438 | /* ASN */ | |
439 | as = strtoul(buf, &endptr, 10); | |
440 | if (*endptr != '\0' || as == BGP_AS4_MAX) | |
441 | goto error; | |
442 | } | |
443 | } else if (*p == '.') { | |
444 | if (separator) | |
445 | goto error; | |
446 | dot++; | |
447 | if (dot > 4) | |
448 | goto error; | |
449 | } else { | |
450 | digit = 1; | |
451 | ||
452 | /* We're past the IP/ASN part */ | |
453 | if (separator) { | |
454 | val *= 10; | |
455 | val += (*p - '0'); | |
456 | } | |
457 | } | |
458 | p++; | |
459 | } | |
460 | ||
461 | /* Low digit part must be there. */ | |
462 | if (!digit || !separator) | |
463 | goto error; | |
464 | ||
465 | /* Encode result into extended community. */ | |
466 | if (dot) | |
467 | ecomm_type = ECOMMUNITY_ENCODE_IP; | |
468 | else if (as > BGP_AS_MAX) | |
469 | ecomm_type = ECOMMUNITY_ENCODE_AS4; | |
470 | else | |
471 | ecomm_type = ECOMMUNITY_ENCODE_AS; | |
472 | if (ecommunity_encode(ecomm_type, 0, 1, as, ip, val, eval)) | |
473 | goto error; | |
474 | *token = ecommunity_token_val; | |
475 | return p; | |
476 | ||
477 | error: | |
478 | *token = ecommunity_token_unknown; | |
479 | return p; | |
480 | } | |
481 | ||
482 | /* Convert string to extended community attribute. | |
483 | ||
484 | When type is already known, please specify both str and type. str | |
485 | should not include keyword such as "rt" and "soo". Type is | |
486 | ECOMMUNITY_ROUTE_TARGET or ECOMMUNITY_SITE_ORIGIN. | |
487 | keyword_included should be zero. | |
488 | ||
489 | For example route-map's "set extcommunity" command case: | |
490 | ||
491 | "rt 100:1 100:2 100:3" -> str = "100:1 100:2 100:3" | |
492 | type = ECOMMUNITY_ROUTE_TARGET | |
493 | keyword_included = 0 | |
494 | ||
495 | "soo 100:1" -> str = "100:1" | |
496 | type = ECOMMUNITY_SITE_ORIGIN | |
497 | keyword_included = 0 | |
498 | ||
499 | When string includes keyword for each extended community value. | |
500 | Please specify keyword_included as non-zero value. | |
501 | ||
502 | For example standard extcommunity-list case: | |
503 | ||
504 | "rt 100:1 rt 100:2 soo 100:1" -> str = "rt 100:1 rt 100:2 soo 100:1" | |
505 | type = 0 | |
506 | keyword_include = 1 | |
507 | */ | |
508 | struct ecommunity *ecommunity_str2com(const char *str, int type, | |
509 | int keyword_included) | |
510 | { | |
511 | struct ecommunity *ecom = NULL; | |
512 | enum ecommunity_token token = ecommunity_token_unknown; | |
513 | struct ecommunity_val eval; | |
514 | int keyword = 0; | |
515 | ||
516 | while ((str = ecommunity_gettoken(str, &eval, &token))) { | |
517 | switch (token) { | |
518 | case ecommunity_token_rt: | |
519 | case ecommunity_token_soo: | |
520 | if (!keyword_included || keyword) { | |
521 | if (ecom) | |
522 | ecommunity_free(&ecom); | |
523 | return NULL; | |
524 | } | |
525 | keyword = 1; | |
526 | ||
527 | if (token == ecommunity_token_rt) { | |
528 | type = ECOMMUNITY_ROUTE_TARGET; | |
529 | } | |
530 | if (token == ecommunity_token_soo) { | |
531 | type = ECOMMUNITY_SITE_ORIGIN; | |
532 | } | |
533 | break; | |
534 | case ecommunity_token_val: | |
535 | if (keyword_included) { | |
536 | if (!keyword) { | |
537 | if (ecom) | |
538 | ecommunity_free(&ecom); | |
539 | return NULL; | |
540 | } | |
541 | keyword = 0; | |
542 | } | |
543 | if (ecom == NULL) | |
544 | ecom = ecommunity_new(); | |
545 | eval.val[1] = type; | |
546 | ecommunity_add_val(ecom, &eval); | |
547 | break; | |
548 | case ecommunity_token_unknown: | |
549 | default: | |
550 | if (ecom) | |
551 | ecommunity_free(&ecom); | |
552 | return NULL; | |
553 | } | |
554 | } | |
555 | return ecom; | |
556 | } | |
557 | ||
558 | static int ecommunity_rt_soo_str(char *buf, size_t bufsz, uint8_t *pnt, | |
559 | int type, int sub_type, int format) | |
560 | { | |
561 | int len = 0; | |
562 | const char *prefix; | |
563 | ||
564 | /* For parse Extended Community attribute tupple. */ | |
565 | struct ecommunity_as eas; | |
566 | struct ecommunity_ip eip; | |
567 | ||
568 | ||
569 | /* Determine prefix for string, if any. */ | |
570 | switch (format) { | |
571 | case ECOMMUNITY_FORMAT_COMMUNITY_LIST: | |
572 | prefix = (sub_type == ECOMMUNITY_ROUTE_TARGET ? "rt " : "soo "); | |
573 | break; | |
574 | case ECOMMUNITY_FORMAT_DISPLAY: | |
575 | prefix = (sub_type == ECOMMUNITY_ROUTE_TARGET ? "RT:" : "SoO:"); | |
576 | break; | |
577 | case ECOMMUNITY_FORMAT_ROUTE_MAP: | |
578 | prefix = ""; | |
579 | break; | |
580 | default: | |
581 | prefix = ""; | |
582 | break; | |
583 | } | |
584 | ||
585 | /* Put string into buffer. */ | |
586 | if (type == ECOMMUNITY_ENCODE_AS4) { | |
587 | pnt = ptr_get_be32(pnt, &eas.as); | |
588 | eas.val = (*pnt++ << 8); | |
589 | eas.val |= (*pnt++); | |
590 | ||
591 | len = snprintf(buf, bufsz, "%s%u:%u", prefix, eas.as, eas.val); | |
592 | } else if (type == ECOMMUNITY_ENCODE_AS) { | |
593 | eas.as = (*pnt++ << 8); | |
594 | eas.as |= (*pnt++); | |
595 | pnt = ptr_get_be32(pnt, &eas.val); | |
596 | ||
597 | len = snprintf(buf, bufsz, "%s%u:%u", prefix, eas.as, eas.val); | |
598 | } else if (type == ECOMMUNITY_ENCODE_IP) { | |
599 | memcpy(&eip.ip, pnt, 4); | |
600 | pnt += 4; | |
601 | eip.val = (*pnt++ << 8); | |
602 | eip.val |= (*pnt++); | |
603 | ||
604 | len = snprintf(buf, bufsz, "%s%s:%u", prefix, inet_ntoa(eip.ip), | |
605 | eip.val); | |
606 | } | |
607 | ||
608 | /* consume value */ | |
609 | (void)pnt; | |
610 | ||
611 | return len; | |
612 | } | |
613 | ||
614 | /* Convert extended community attribute to string. | |
615 | ||
616 | Due to historical reason of industry standard implementation, there | |
617 | are three types of format. | |
618 | ||
619 | route-map set extcommunity format | |
620 | "rt 100:1 100:2" | |
621 | "soo 100:3" | |
622 | ||
623 | extcommunity-list | |
624 | "rt 100:1 rt 100:2 soo 100:3" | |
625 | ||
626 | "show [ip] bgp" and extcommunity-list regular expression matching | |
627 | "RT:100:1 RT:100:2 SoO:100:3" | |
628 | ||
629 | For each formath please use below definition for format: | |
630 | ||
631 | ECOMMUNITY_FORMAT_ROUTE_MAP | |
632 | ECOMMUNITY_FORMAT_COMMUNITY_LIST | |
633 | ECOMMUNITY_FORMAT_DISPLAY | |
634 | ||
635 | Filter is added to display only ECOMMUNITY_ROUTE_TARGET in some cases. | |
636 | 0 value displays all | |
637 | */ | |
638 | char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter) | |
639 | { | |
640 | int i; | |
641 | uint8_t *pnt; | |
642 | uint8_t type = 0; | |
643 | uint8_t sub_type = 0; | |
644 | #define ECOMMUNITY_STRLEN 64 | |
645 | int str_size; | |
646 | char *str_buf; | |
647 | ||
648 | if (ecom->size == 0) | |
649 | return XCALLOC(MTYPE_ECOMMUNITY_STR, 1); | |
650 | ||
651 | /* ecom strlen + space + null term */ | |
652 | str_size = (ecom->size * (ECOMMUNITY_STRLEN + 1)) + 1; | |
653 | str_buf = XCALLOC(MTYPE_ECOMMUNITY_STR, str_size); | |
654 | ||
655 | char encbuf[128]; | |
656 | ||
657 | for (i = 0; i < ecom->size; i++) { | |
658 | int unk_ecom = 0; | |
659 | memset(encbuf, 0x00, sizeof(encbuf)); | |
660 | ||
661 | /* Space between each value. */ | |
662 | if (i > 0) | |
663 | strlcat(str_buf, " ", str_size); | |
664 | ||
665 | /* Retrieve value field */ | |
666 | pnt = ecom->val + (i * 8); | |
667 | ||
668 | /* High-order octet is the type */ | |
669 | type = *pnt++; | |
670 | ||
671 | if (type == ECOMMUNITY_ENCODE_AS || type == ECOMMUNITY_ENCODE_IP | |
672 | || type == ECOMMUNITY_ENCODE_AS4) { | |
673 | /* Low-order octet of type. */ | |
674 | sub_type = *pnt++; | |
675 | if (sub_type != ECOMMUNITY_ROUTE_TARGET | |
676 | && sub_type != ECOMMUNITY_SITE_ORIGIN) { | |
677 | if (sub_type == | |
678 | ECOMMUNITY_FLOWSPEC_REDIRECT_IPV4 && | |
679 | type == ECOMMUNITY_ENCODE_IP) { | |
680 | struct in_addr *ipv4 = | |
681 | (struct in_addr *)pnt; | |
682 | char ipv4str[INET_ADDRSTRLEN]; | |
683 | ||
684 | inet_ntop(AF_INET, ipv4, | |
685 | ipv4str, | |
686 | INET_ADDRSTRLEN); | |
687 | snprintf(encbuf, sizeof(encbuf), | |
688 | "NH:%s:%d", ipv4str, pnt[5]); | |
689 | } else | |
690 | unk_ecom = 1; | |
691 | } else { | |
692 | ecommunity_rt_soo_str(encbuf, sizeof(encbuf), | |
693 | pnt, type, sub_type, | |
694 | format); | |
695 | } | |
696 | } else if (type == ECOMMUNITY_ENCODE_OPAQUE) { | |
697 | if (filter == ECOMMUNITY_ROUTE_TARGET) | |
698 | continue; | |
699 | if (*pnt == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP) { | |
700 | uint16_t tunneltype; | |
701 | memcpy(&tunneltype, pnt + 5, 2); | |
702 | tunneltype = ntohs(tunneltype); | |
703 | ||
704 | snprintf(encbuf, sizeof(encbuf), "ET:%d", | |
705 | tunneltype); | |
706 | } else if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_DEF_GW) { | |
707 | strlcpy(encbuf, "Default Gateway", | |
708 | sizeof(encbuf)); | |
709 | } else { | |
710 | unk_ecom = 1; | |
711 | } | |
712 | } else if (type == ECOMMUNITY_ENCODE_EVPN) { | |
713 | if (filter == ECOMMUNITY_ROUTE_TARGET) | |
714 | continue; | |
715 | if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC) { | |
716 | struct ethaddr rmac; | |
717 | pnt++; | |
718 | memcpy(&rmac, pnt, ETH_ALEN); | |
719 | ||
720 | snprintf(encbuf, sizeof(encbuf), | |
721 | "Rmac:%02x:%02x:%02x:%02x:%02x:%02x", | |
722 | (uint8_t)rmac.octet[0], | |
723 | (uint8_t)rmac.octet[1], | |
724 | (uint8_t)rmac.octet[2], | |
725 | (uint8_t)rmac.octet[3], | |
726 | (uint8_t)rmac.octet[4], | |
727 | (uint8_t)rmac.octet[5]); | |
728 | } else if (*pnt | |
729 | == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY) { | |
730 | uint32_t seqnum; | |
731 | uint8_t flags = *++pnt; | |
732 | ||
733 | memcpy(&seqnum, pnt + 2, 4); | |
734 | seqnum = ntohl(seqnum); | |
735 | ||
736 | snprintf(encbuf, sizeof(encbuf), "MM:%u", | |
737 | seqnum); | |
738 | ||
739 | if (CHECK_FLAG( | |
740 | flags, | |
741 | ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY)) | |
742 | strlcat(encbuf, ", sticky MAC", | |
743 | sizeof(encbuf)); | |
744 | } else if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_ND) { | |
745 | uint8_t flags = *++pnt; | |
746 | ||
747 | if (CHECK_FLAG( | |
748 | flags, | |
749 | ECOMMUNITY_EVPN_SUBTYPE_ND_ROUTER_FLAG)) | |
750 | strlcpy(encbuf, "ND:Router Flag", | |
751 | sizeof(encbuf)); | |
752 | } else | |
753 | unk_ecom = 1; | |
754 | } else if (type == ECOMMUNITY_ENCODE_REDIRECT_IP_NH) { | |
755 | sub_type = *pnt++; | |
756 | if (sub_type == ECOMMUNITY_REDIRECT_IP_NH) { | |
757 | snprintf(encbuf, sizeof(encbuf), | |
758 | "FS:redirect IP 0x%x", *(pnt + 5)); | |
759 | } else | |
760 | unk_ecom = 1; | |
761 | } else if (type == ECOMMUNITY_ENCODE_TRANS_EXP || | |
762 | type == ECOMMUNITY_EXTENDED_COMMUNITY_PART_2 || | |
763 | type == ECOMMUNITY_EXTENDED_COMMUNITY_PART_3) { | |
764 | sub_type = *pnt++; | |
765 | if (sub_type == ECOMMUNITY_REDIRECT_VRF) { | |
766 | char buf[16] = {}; | |
767 | ecommunity_rt_soo_str( | |
768 | buf, sizeof(buf), (uint8_t *)pnt, | |
769 | type & ~ECOMMUNITY_ENCODE_TRANS_EXP, | |
770 | ECOMMUNITY_ROUTE_TARGET, | |
771 | ECOMMUNITY_FORMAT_DISPLAY); | |
772 | snprintf(encbuf, sizeof(encbuf), | |
773 | "FS:redirect VRF %s", buf); | |
774 | } else if (type != ECOMMUNITY_ENCODE_TRANS_EXP) | |
775 | unk_ecom = 1; | |
776 | else if (sub_type == ECOMMUNITY_TRAFFIC_ACTION) { | |
777 | char action[64]; | |
778 | ||
779 | if (*(pnt+3) == | |
780 | 1 << FLOWSPEC_TRAFFIC_ACTION_TERMINAL) | |
781 | strlcpy(action, "terminate (apply)", | |
782 | sizeof(action)); | |
783 | else | |
784 | strlcpy(action, "eval stops", | |
785 | sizeof(action)); | |
786 | ||
787 | if (*(pnt+3) == | |
788 | 1 << FLOWSPEC_TRAFFIC_ACTION_SAMPLE) | |
789 | strlcat(action, ", sample", | |
790 | sizeof(action)); | |
791 | ||
792 | ||
793 | snprintf(encbuf, sizeof(encbuf), "FS:action %s", | |
794 | action); | |
795 | } else if (sub_type == ECOMMUNITY_TRAFFIC_RATE) { | |
796 | union traffic_rate data; | |
797 | ||
798 | data.rate_byte[3] = *(pnt+2); | |
799 | data.rate_byte[2] = *(pnt+3); | |
800 | data.rate_byte[1] = *(pnt+4); | |
801 | data.rate_byte[0] = *(pnt+5); | |
802 | snprintf(encbuf, sizeof(encbuf), "FS:rate %f", | |
803 | data.rate_float); | |
804 | } else if (sub_type == ECOMMUNITY_TRAFFIC_MARKING) { | |
805 | snprintf(encbuf, sizeof(encbuf), | |
806 | "FS:marking %u", *(pnt + 5)); | |
807 | } else if (*pnt | |
808 | == ECOMMUNITY_EVPN_SUBTYPE_ES_IMPORT_RT) { | |
809 | struct ethaddr mac; | |
810 | ||
811 | memcpy(&mac, pnt, ETH_ALEN); | |
812 | ||
813 | snprintf( | |
814 | encbuf, sizeof(encbuf), | |
815 | "ES-Import-Rt:%02x:%02x:%02x:%02x:%02x:%02x", | |
816 | (uint8_t)mac.octet[0], | |
817 | (uint8_t)mac.octet[1], | |
818 | (uint8_t)mac.octet[2], | |
819 | (uint8_t)mac.octet[3], | |
820 | (uint8_t)mac.octet[4], | |
821 | (uint8_t)mac.octet[5]); | |
822 | } else | |
823 | unk_ecom = 1; | |
824 | } else { | |
825 | sub_type = *pnt++; | |
826 | unk_ecom = 1; | |
827 | } | |
828 | ||
829 | if (unk_ecom) | |
830 | snprintf(encbuf, sizeof(encbuf), "UNK:%d, %d", type, | |
831 | sub_type); | |
832 | ||
833 | int r = strlcat(str_buf, encbuf, str_size); | |
834 | assert(r < str_size); | |
835 | } | |
836 | ||
837 | return str_buf; | |
838 | } | |
839 | ||
840 | int ecommunity_match(const struct ecommunity *ecom1, | |
841 | const struct ecommunity *ecom2) | |
842 | { | |
843 | int i = 0; | |
844 | int j = 0; | |
845 | ||
846 | if (ecom1 == NULL && ecom2 == NULL) | |
847 | return 1; | |
848 | ||
849 | if (ecom1 == NULL || ecom2 == NULL) | |
850 | return 0; | |
851 | ||
852 | if (ecom1->size < ecom2->size) | |
853 | return 0; | |
854 | ||
855 | /* Every community on com2 needs to be on com1 for this to match */ | |
856 | while (i < ecom1->size && j < ecom2->size) { | |
857 | if (memcmp(ecom1->val + i * ECOMMUNITY_SIZE, | |
858 | ecom2->val + j * ECOMMUNITY_SIZE, ECOMMUNITY_SIZE) | |
859 | == 0) | |
860 | j++; | |
861 | i++; | |
862 | } | |
863 | ||
864 | if (j == ecom2->size) | |
865 | return 1; | |
866 | else | |
867 | return 0; | |
868 | } | |
869 | ||
870 | /* return first occurence of type */ | |
871 | extern struct ecommunity_val *ecommunity_lookup(const struct ecommunity *ecom, | |
872 | uint8_t type, uint8_t subtype) | |
873 | { | |
874 | uint8_t *p; | |
875 | int c; | |
876 | ||
877 | /* If the value already exists in the structure return 0. */ | |
878 | c = 0; | |
879 | for (p = ecom->val; c < ecom->size; p += ECOMMUNITY_SIZE, c++) { | |
880 | if (p == NULL) { | |
881 | continue; | |
882 | } | |
883 | if (p[0] == type && p[1] == subtype) | |
884 | return (struct ecommunity_val *)p; | |
885 | } | |
886 | return NULL; | |
887 | } | |
888 | ||
889 | /* remove ext. community matching type and subtype | |
890 | * return 1 on success ( removed ), 0 otherwise (not present) | |
891 | */ | |
892 | extern int ecommunity_strip(struct ecommunity *ecom, uint8_t type, | |
893 | uint8_t subtype) | |
894 | { | |
895 | uint8_t *p; | |
896 | int c, found = 0; | |
897 | /* When this is fist value, just add it. */ | |
898 | if (ecom == NULL || ecom->val == NULL) { | |
899 | return 0; | |
900 | } | |
901 | ||
902 | /* If the value already exists in the structure return 0. */ | |
903 | c = 0; | |
904 | for (p = ecom->val; c < ecom->size; p += ECOMMUNITY_SIZE, c++) { | |
905 | if (p[0] == type && p[1] == subtype) { | |
906 | found = 1; | |
907 | break; | |
908 | } | |
909 | } | |
910 | if (found == 0) | |
911 | return 0; | |
912 | /* Strip The selected value */ | |
913 | ecom->size--; | |
914 | /* size is reduced. no memmove to do */ | |
915 | p = XMALLOC(MTYPE_ECOMMUNITY_VAL, ecom->size * ECOMMUNITY_SIZE); | |
916 | if (c != 0) | |
917 | memcpy(p, ecom->val, c * ECOMMUNITY_SIZE); | |
918 | if ((ecom->size - c) != 0) | |
919 | memcpy(p + (c)*ECOMMUNITY_SIZE, | |
920 | ecom->val + (c + 1) * ECOMMUNITY_SIZE, | |
921 | (ecom->size - c) * ECOMMUNITY_SIZE); | |
922 | /* shift last ecommunities */ | |
923 | XFREE(MTYPE_ECOMMUNITY, ecom->val); | |
924 | ecom->val = p; | |
925 | return 1; | |
926 | } | |
927 | ||
928 | /* | |
929 | * Remove specified extended community value from extended community. | |
930 | * Returns 1 if value was present (and hence, removed), 0 otherwise. | |
931 | */ | |
932 | int ecommunity_del_val(struct ecommunity *ecom, struct ecommunity_val *eval) | |
933 | { | |
934 | uint8_t *p; | |
935 | int c, found = 0; | |
936 | ||
937 | /* Make sure specified value exists. */ | |
938 | if (ecom == NULL || ecom->val == NULL) | |
939 | return 0; | |
940 | c = 0; | |
941 | for (p = ecom->val; c < ecom->size; p += ECOMMUNITY_SIZE, c++) { | |
942 | if (!memcmp(p, eval->val, ECOMMUNITY_SIZE)) { | |
943 | found = 1; | |
944 | break; | |
945 | } | |
946 | } | |
947 | if (found == 0) | |
948 | return 0; | |
949 | ||
950 | /* Delete the selected value */ | |
951 | ecom->size--; | |
952 | p = XMALLOC(MTYPE_ECOMMUNITY_VAL, ecom->size * ECOMMUNITY_SIZE); | |
953 | if (c != 0) | |
954 | memcpy(p, ecom->val, c * ECOMMUNITY_SIZE); | |
955 | if ((ecom->size - c) != 0) | |
956 | memcpy(p + (c)*ECOMMUNITY_SIZE, | |
957 | ecom->val + (c + 1) * ECOMMUNITY_SIZE, | |
958 | (ecom->size - c) * ECOMMUNITY_SIZE); | |
959 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
960 | ecom->val = p; | |
961 | return 1; | |
962 | } | |
963 | ||
964 | int ecommunity_fill_pbr_action(struct ecommunity_val *ecom_eval, | |
965 | struct bgp_pbr_entry_action *api) | |
966 | { | |
967 | if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_RATE) { | |
968 | api->action = ACTION_TRAFFICRATE; | |
969 | api->u.r.rate_info[3] = ecom_eval->val[4]; | |
970 | api->u.r.rate_info[2] = ecom_eval->val[5]; | |
971 | api->u.r.rate_info[1] = ecom_eval->val[6]; | |
972 | api->u.r.rate_info[0] = ecom_eval->val[7]; | |
973 | } else if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_ACTION) { | |
974 | api->action = ACTION_TRAFFIC_ACTION; | |
975 | /* else distribute code is set by default */ | |
976 | if (ecom_eval->val[5] & (1 << FLOWSPEC_TRAFFIC_ACTION_TERMINAL)) | |
977 | api->u.za.filter |= TRAFFIC_ACTION_TERMINATE; | |
978 | else | |
979 | api->u.za.filter |= TRAFFIC_ACTION_DISTRIBUTE; | |
980 | if (ecom_eval->val[5] == 1 << FLOWSPEC_TRAFFIC_ACTION_SAMPLE) | |
981 | api->u.za.filter |= TRAFFIC_ACTION_SAMPLE; | |
982 | ||
983 | } else if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_MARKING) { | |
984 | api->action = ACTION_MARKING; | |
985 | api->u.marking_dscp = ecom_eval->val[7]; | |
986 | } else if (ecom_eval->val[1] == ECOMMUNITY_REDIRECT_VRF) { | |
987 | /* must use external function */ | |
988 | return 0; | |
989 | } else if (ecom_eval->val[1] == ECOMMUNITY_REDIRECT_IP_NH) { | |
990 | /* see draft-ietf-idr-flowspec-redirect-ip-02 | |
991 | * Q1: how come a ext. community can host ipv6 address | |
992 | * Q2 : from cisco documentation: | |
993 | * Announces the reachability of one or more flowspec NLRI. | |
994 | * When a BGP speaker receives an UPDATE message with the | |
995 | * redirect-to-IP extended community, it is expected to | |
996 | * create a traffic filtering rule for every flow-spec | |
997 | * NLRI in the message that has this path as its best | |
998 | * path. The filter entry matches the IP packets | |
999 | * described in the NLRI field and redirects them or | |
1000 | * copies them towards the IPv4 or IPv6 address specified | |
1001 | * in the 'Network Address of Next- Hop' | |
1002 | * field of the associated MP_REACH_NLRI. | |
1003 | */ | |
1004 | struct ecommunity_ip *ip_ecom = (struct ecommunity_ip *) | |
1005 | ecom_eval + 2; | |
1006 | ||
1007 | api->u.zr.redirect_ip_v4 = ip_ecom->ip; | |
1008 | } else | |
1009 | return -1; | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | static struct ecommunity *bgp_aggr_ecommunity_lookup( | |
1014 | struct bgp_aggregate *aggregate, | |
1015 | struct ecommunity *ecommunity) | |
1016 | { | |
1017 | return hash_lookup(aggregate->ecommunity_hash, ecommunity); | |
1018 | } | |
1019 | ||
1020 | static void *bgp_aggr_ecommunty_hash_alloc(void *p) | |
1021 | { | |
1022 | struct ecommunity *ref = (struct ecommunity *)p; | |
1023 | struct ecommunity *ecommunity = NULL; | |
1024 | ||
1025 | ecommunity = ecommunity_dup(ref); | |
1026 | return ecommunity; | |
1027 | } | |
1028 | ||
1029 | static void bgp_aggr_ecommunity_prepare(struct hash_backet *hb, void *arg) | |
1030 | { | |
1031 | struct ecommunity *hb_ecommunity = hb->data; | |
1032 | struct ecommunity **aggr_ecommunity = arg; | |
1033 | ||
1034 | if (*aggr_ecommunity) | |
1035 | *aggr_ecommunity = ecommunity_merge(*aggr_ecommunity, | |
1036 | hb_ecommunity); | |
1037 | else | |
1038 | *aggr_ecommunity = ecommunity_dup(hb_ecommunity); | |
1039 | } | |
1040 | ||
1041 | void bgp_aggr_ecommunity_remove(void *arg) | |
1042 | { | |
1043 | struct ecommunity *ecommunity = arg; | |
1044 | ||
1045 | ecommunity_free(&ecommunity); | |
1046 | } | |
1047 | ||
1048 | void bgp_compute_aggregate_ecommunity(struct bgp_aggregate *aggregate, | |
1049 | struct ecommunity *ecommunity) | |
1050 | { | |
1051 | bgp_compute_aggregate_ecommunity_hash(aggregate, ecommunity); | |
1052 | bgp_compute_aggregate_ecommunity_val(aggregate); | |
1053 | } | |
1054 | ||
1055 | ||
1056 | void bgp_compute_aggregate_ecommunity_hash(struct bgp_aggregate *aggregate, | |
1057 | struct ecommunity *ecommunity) | |
1058 | { | |
1059 | struct ecommunity *aggr_ecommunity = NULL; | |
1060 | ||
1061 | if ((aggregate == NULL) || (ecommunity == NULL)) | |
1062 | return; | |
1063 | ||
1064 | /* Create hash if not already created. | |
1065 | */ | |
1066 | if (aggregate->ecommunity_hash == NULL) | |
1067 | aggregate->ecommunity_hash = hash_create( | |
1068 | ecommunity_hash_make, ecommunity_cmp, | |
1069 | "BGP Aggregator ecommunity hash"); | |
1070 | ||
1071 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1072 | if (aggr_ecommunity == NULL) { | |
1073 | /* Insert ecommunity into hash. | |
1074 | */ | |
1075 | aggr_ecommunity = hash_get(aggregate->ecommunity_hash, | |
1076 | ecommunity, | |
1077 | bgp_aggr_ecommunty_hash_alloc); | |
1078 | } | |
1079 | ||
1080 | /* Increment reference counter. | |
1081 | */ | |
1082 | aggr_ecommunity->refcnt++; | |
1083 | } | |
1084 | ||
1085 | void bgp_compute_aggregate_ecommunity_val(struct bgp_aggregate *aggregate) | |
1086 | { | |
1087 | struct ecommunity *ecommerge = NULL; | |
1088 | ||
1089 | if (aggregate == NULL) | |
1090 | return; | |
1091 | ||
1092 | /* Re-compute aggregate's ecommunity. | |
1093 | */ | |
1094 | if (aggregate->ecommunity) | |
1095 | ecommunity_free(&aggregate->ecommunity); | |
1096 | if (aggregate->ecommunity_hash | |
1097 | && aggregate->ecommunity_hash->count) { | |
1098 | hash_iterate(aggregate->ecommunity_hash, | |
1099 | bgp_aggr_ecommunity_prepare, | |
1100 | &aggregate->ecommunity); | |
1101 | ecommerge = aggregate->ecommunity; | |
1102 | aggregate->ecommunity = ecommunity_uniq_sort(ecommerge); | |
1103 | if (ecommerge) | |
1104 | ecommunity_free(&ecommerge); | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | void bgp_remove_ecommunity_from_aggregate(struct bgp_aggregate *aggregate, | |
1109 | struct ecommunity *ecommunity) | |
1110 | { | |
1111 | struct ecommunity *aggr_ecommunity = NULL; | |
1112 | struct ecommunity *ret_ecomm = NULL; | |
1113 | ||
1114 | if ((!aggregate) | |
1115 | || (!aggregate->ecommunity_hash) | |
1116 | || (!ecommunity)) | |
1117 | return; | |
1118 | ||
1119 | /* Look-up the ecommunity in the hash. | |
1120 | */ | |
1121 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1122 | if (aggr_ecommunity) { | |
1123 | aggr_ecommunity->refcnt--; | |
1124 | ||
1125 | if (aggr_ecommunity->refcnt == 0) { | |
1126 | ret_ecomm = hash_release(aggregate->ecommunity_hash, | |
1127 | aggr_ecommunity); | |
1128 | ecommunity_free(&ret_ecomm); | |
1129 | bgp_compute_aggregate_ecommunity_val(aggregate); | |
1130 | } | |
1131 | } | |
1132 | } | |
1133 | ||
1134 | void bgp_remove_ecomm_from_aggregate_hash(struct bgp_aggregate *aggregate, | |
1135 | struct ecommunity *ecommunity) | |
1136 | { | |
1137 | ||
1138 | struct ecommunity *aggr_ecommunity = NULL; | |
1139 | struct ecommunity *ret_ecomm = NULL; | |
1140 | ||
1141 | if ((!aggregate) | |
1142 | || (!aggregate->ecommunity_hash) | |
1143 | || (!ecommunity)) | |
1144 | return; | |
1145 | ||
1146 | /* Look-up the ecommunity in the hash. | |
1147 | */ | |
1148 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1149 | if (aggr_ecommunity) { | |
1150 | aggr_ecommunity->refcnt--; | |
1151 | ||
1152 | if (aggr_ecommunity->refcnt == 0) { | |
1153 | ret_ecomm = hash_release(aggregate->ecommunity_hash, | |
1154 | aggr_ecommunity); | |
1155 | ecommunity_free(&ret_ecomm); | |
1156 | } | |
1157 | } | |
1158 | } |