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Commit | Line | Data |
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718e3744 | 1 | /* BGP Extended Communities Attribute |
896014f4 DL |
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 | */ | |
718e3744 | 20 | |
21 | #include <zebra.h> | |
22 | ||
23 | #include "hash.h" | |
24 | #include "memory.h" | |
25 | #include "prefix.h" | |
26 | #include "command.h" | |
3f9c7369 | 27 | #include "queue.h" |
039f3a34 | 28 | #include "filter.h" |
3f65c5b1 | 29 | #include "jhash.h" |
937652c6 | 30 | #include "stream.h" |
718e3744 | 31 | |
32 | #include "bgpd/bgpd.h" | |
33 | #include "bgpd/bgp_ecommunity.h" | |
57d187bc | 34 | #include "bgpd/bgp_lcommunity.h" |
0b2aa3a0 | 35 | #include "bgpd/bgp_aspath.h" |
a8d72b61 | 36 | #include "bgpd/bgp_flowspec_private.h" |
dacf6ec1 | 37 | #include "bgpd/bgp_pbr.h" |
a8d72b61 PG |
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 | }; | |
718e3744 | 44 | |
45 | /* Hash of community attribute. */ | |
ffa4e2c4 | 46 | static struct hash *ecomhash; |
6b0655a2 | 47 | |
718e3744 | 48 | /* Allocate a new ecommunities. */ |
d62a17ae | 49 | struct ecommunity *ecommunity_new(void) |
718e3744 | 50 | { |
9f5dc319 | 51 | return XCALLOC(MTYPE_ECOMMUNITY, sizeof(struct ecommunity)); |
718e3744 | 52 | } |
53 | ||
c7ee6c35 DS |
54 | void ecommunity_strfree(char **s) |
55 | { | |
56 | XFREE(MTYPE_ECOMMUNITY_STR, *s); | |
57 | } | |
58 | ||
718e3744 | 59 | /* Allocate ecommunities. */ |
d62a17ae | 60 | void ecommunity_free(struct ecommunity **ecom) |
718e3744 | 61 | { |
0a22ddfb QY |
62 | XFREE(MTYPE_ECOMMUNITY_VAL, (*ecom)->val); |
63 | XFREE(MTYPE_ECOMMUNITY_STR, (*ecom)->str); | |
d62a17ae | 64 | XFREE(MTYPE_ECOMMUNITY, *ecom); |
718e3744 | 65 | } |
66 | ||
d62a17ae | 67 | static void ecommunity_hash_free(struct ecommunity *ecom) |
7bae2fb9 | 68 | { |
d62a17ae | 69 | ecommunity_free(&ecom); |
7bae2fb9 LB |
70 | } |
71 | ||
72 | ||
718e3744 | 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. */ | |
3dc339cd | 78 | bool ecommunity_add_val(struct ecommunity *ecom, struct ecommunity_val *eval) |
718e3744 | 79 | { |
d62a17ae | 80 | int c; |
81 | ||
91085f97 | 82 | /* When this is fist value, just add it. */ |
d62a17ae | 83 | if (ecom->val == NULL) { |
91085f97 QY |
84 | ecom->size = 1; |
85 | ecom->val = XCALLOC(MTYPE_ECOMMUNITY_VAL, ECOMMUNITY_SIZE); | |
d62a17ae | 86 | memcpy(ecom->val, eval->val, ECOMMUNITY_SIZE); |
3dc339cd | 87 | return true; |
d62a17ae | 88 | } |
89 | ||
90 | /* If the value already exists in the structure return 0. */ | |
91 | c = 0; | |
91085f97 QY |
92 | for (uint8_t *p = ecom->val; c < ecom->size; |
93 | p += ECOMMUNITY_SIZE, c++) { | |
94 | int ret = memcmp(p, eval->val, ECOMMUNITY_SIZE); | |
d62a17ae | 95 | if (ret == 0) |
3dc339cd | 96 | return false; |
91085f97 | 97 | else if (ret > 0) |
d62a17ae | 98 | break; |
99 | } | |
100 | ||
101 | /* Add the value to the structure with numerical sorting. */ | |
102 | ecom->size++; | |
91085f97 QY |
103 | ecom->val = XREALLOC(MTYPE_ECOMMUNITY_VAL, ecom->val, |
104 | ecom->size * ECOMMUNITY_SIZE); | |
d62a17ae | 105 | |
91085f97 QY |
106 | memmove(ecom->val + ((c + 1) * ECOMMUNITY_SIZE), |
107 | ecom->val + (c * ECOMMUNITY_SIZE), | |
d62a17ae | 108 | (ecom->size - 1 - c) * ECOMMUNITY_SIZE); |
91085f97 | 109 | memcpy(ecom->val + (c * ECOMMUNITY_SIZE), eval->val, ECOMMUNITY_SIZE); |
d62a17ae | 110 | |
3dc339cd | 111 | return true; |
718e3744 | 112 | } |
113 | ||
114 | /* This function takes pointer to Extended Communites strucutre then | |
115 | create a new Extended Communities structure by uniq and sort each | |
e6b6a564 | 116 | Extended Communities value. */ |
d62a17ae | 117 | struct ecommunity *ecommunity_uniq_sort(struct ecommunity *ecom) |
718e3744 | 118 | { |
d62a17ae | 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; | |
718e3744 | 134 | } |
135 | ||
136 | /* Parse Extended Communites Attribute in BGP packet. */ | |
d7c0a89a | 137 | struct ecommunity *ecommunity_parse(uint8_t *pnt, unsigned short length) |
718e3744 | 138 | { |
d62a17ae | 139 | struct ecommunity tmp; |
140 | struct ecommunity *new; | |
718e3744 | 141 | |
d62a17ae | 142 | /* Length check. */ |
143 | if (length % ECOMMUNITY_SIZE) | |
144 | return NULL; | |
718e3744 | 145 | |
d62a17ae | 146 | /* Prepare tmporary structure for making a new Extended Communities |
147 | Attribute. */ | |
148 | tmp.size = length / ECOMMUNITY_SIZE; | |
149 | tmp.val = pnt; | |
718e3744 | 150 | |
d62a17ae | 151 | /* Create a new Extended Communities Attribute by uniq and sort each |
152 | Extended Communities value */ | |
153 | new = ecommunity_uniq_sort(&tmp); | |
718e3744 | 154 | |
d62a17ae | 155 | return ecommunity_intern(new); |
718e3744 | 156 | } |
157 | ||
158 | /* Duplicate the Extended Communities Attribute structure. */ | |
d62a17ae | 159 | struct ecommunity *ecommunity_dup(struct ecommunity *ecom) |
718e3744 | 160 | { |
d62a17ae | 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; | |
718e3744 | 172 | } |
173 | ||
4372df71 | 174 | /* Retrun string representation of communities attribute. */ |
d62a17ae | 175 | char *ecommunity_str(struct ecommunity *ecom) |
4372df71 | 176 | { |
d62a17ae | 177 | if (!ecom->str) |
178 | ecom->str = | |
179 | ecommunity_ecom2str(ecom, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
180 | return ecom->str; | |
4372df71 | 181 | } |
182 | ||
718e3744 | 183 | /* Merge two Extended Communities Attribute structure. */ |
d62a17ae | 184 | struct ecommunity *ecommunity_merge(struct ecommunity *ecom1, |
185 | struct ecommunity *ecom2) | |
718e3744 | 186 | { |
d62a17ae | 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; | |
718e3744 | 201 | } |
202 | ||
203 | /* Intern Extended Communities Attribute. */ | |
d62a17ae | 204 | struct ecommunity *ecommunity_intern(struct ecommunity *ecom) |
718e3744 | 205 | { |
d62a17ae | 206 | struct ecommunity *find; |
718e3744 | 207 | |
d62a17ae | 208 | assert(ecom->refcnt == 0); |
718e3744 | 209 | |
d62a17ae | 210 | find = (struct ecommunity *)hash_get(ecomhash, ecom, hash_alloc_intern); |
718e3744 | 211 | |
d62a17ae | 212 | if (find != ecom) |
213 | ecommunity_free(&ecom); | |
718e3744 | 214 | |
d62a17ae | 215 | find->refcnt++; |
718e3744 | 216 | |
d62a17ae | 217 | if (!find->str) |
218 | find->str = | |
219 | ecommunity_ecom2str(find, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
718e3744 | 220 | |
d62a17ae | 221 | return find; |
718e3744 | 222 | } |
223 | ||
224 | /* Unintern Extended Communities Attribute. */ | |
d62a17ae | 225 | void ecommunity_unintern(struct ecommunity **ecom) |
718e3744 | 226 | { |
d62a17ae | 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 | } | |
718e3744 | 240 | } |
241 | ||
242 | /* Utinity function to make hash key. */ | |
d8b87afe | 243 | unsigned int ecommunity_hash_make(const void *arg) |
718e3744 | 244 | { |
d62a17ae | 245 | const struct ecommunity *ecom = arg; |
246 | int size = ecom->size * ECOMMUNITY_SIZE; | |
d62a17ae | 247 | |
3f65c5b1 | 248 | return jhash(ecom->val, size, 0x564321ab); |
718e3744 | 249 | } |
250 | ||
251 | /* Compare two Extended Communities Attribute structure. */ | |
74df8d6d | 252 | bool ecommunity_cmp(const void *arg1, const void *arg2) |
718e3744 | 253 | { |
d62a17ae | 254 | const struct ecommunity *ecom1 = arg1; |
255 | const struct ecommunity *ecom2 = arg2; | |
256 | ||
257 | if (ecom1 == NULL && ecom2 == NULL) | |
74df8d6d | 258 | return true; |
813d4307 | 259 | |
d62a17ae | 260 | if (ecom1 == NULL || ecom2 == NULL) |
74df8d6d | 261 | return false; |
813d4307 | 262 | |
d62a17ae | 263 | return (ecom1->size == ecom2->size |
264 | && memcmp(ecom1->val, ecom2->val, ecom1->size * ECOMMUNITY_SIZE) | |
265 | == 0); | |
718e3744 | 266 | } |
267 | ||
268 | /* Initialize Extended Comminities related hash. */ | |
d62a17ae | 269 | void ecommunity_init(void) |
718e3744 | 270 | { |
996c9314 | 271 | ecomhash = hash_create(ecommunity_hash_make, ecommunity_cmp, |
3f65c5b1 | 272 | "BGP ecommunity hash"); |
718e3744 | 273 | } |
228da428 | 274 | |
d62a17ae | 275 | void ecommunity_finish(void) |
228da428 | 276 | { |
d62a17ae | 277 | hash_clean(ecomhash, (void (*)(void *))ecommunity_hash_free); |
278 | hash_free(ecomhash); | |
279 | ecomhash = NULL; | |
228da428 | 280 | } |
6b0655a2 | 281 | |
718e3744 | 282 | /* Extended Communities token enum. */ |
d62a17ae | 283 | enum ecommunity_token { |
284 | ecommunity_token_unknown = 0, | |
285 | ecommunity_token_rt, | |
286 | ecommunity_token_soo, | |
287 | ecommunity_token_val, | |
718e3744 | 288 | }; |
289 | ||
c5900768 | 290 | /* |
291 | * Encode BGP extended community from passed values. Supports types | |
292 | * defined in RFC 4360 and well-known sub-types. | |
293 | */ | |
d7c0a89a QY |
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, | |
d62a17ae | 296 | struct ecommunity_val *eval) |
c5900768 | 297 | { |
d62a17ae | 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; | |
c5900768 | 334 | } |
335 | ||
718e3744 | 336 | /* Get next Extended Communities token from the string. */ |
d62a17ae | 337 | static const char *ecommunity_gettoken(const char *str, |
338 | struct ecommunity_val *eval, | |
339 | enum ecommunity_token *token) | |
718e3744 | 340 | { |
d62a17ae | 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; | |
d7c0a89a QY |
349 | uint32_t val = 0; |
350 | uint8_t ecomm_type; | |
d62a17ae | 351 | char buf[INET_ADDRSTRLEN + 1]; |
352 | ||
353 | /* Skip white space. */ | |
fefa5e0f | 354 | while (isspace((unsigned char)*p)) { |
d62a17ae | 355 | p++; |
356 | str++; | |
718e3744 | 357 | } |
d62a17ae | 358 | |
359 | /* Check the end of the line. */ | |
360 | if (*p == '\0') | |
361 | return NULL; | |
362 | ||
363 | /* "rt" and "soo" keyword parse. */ | |
fefa5e0f | 364 | if (!isdigit((unsigned char)*p)) { |
d62a17ae | 365 | /* "rt" match check. */ |
fefa5e0f | 366 | if (tolower((unsigned char)*p) == 'r') { |
d62a17ae | 367 | p++; |
fefa5e0f | 368 | if (tolower((unsigned char)*p) == 't') { |
d62a17ae | 369 | p++; |
370 | *token = ecommunity_token_rt; | |
371 | return p; | |
372 | } | |
fefa5e0f | 373 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 374 | *token = ecommunity_token_rt; |
375 | return p; | |
376 | } | |
377 | goto error; | |
718e3744 | 378 | } |
d62a17ae | 379 | /* "soo" match check. */ |
fefa5e0f | 380 | else if (tolower((unsigned char)*p) == 's') { |
d62a17ae | 381 | p++; |
fefa5e0f | 382 | if (tolower((unsigned char)*p) == 'o') { |
d62a17ae | 383 | p++; |
fefa5e0f | 384 | if (tolower((unsigned char)*p) == 'o') { |
d62a17ae | 385 | p++; |
386 | *token = ecommunity_token_soo; | |
387 | return p; | |
388 | } | |
fefa5e0f | 389 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 390 | *token = ecommunity_token_soo; |
391 | return p; | |
392 | } | |
393 | goto error; | |
394 | } | |
fefa5e0f | 395 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 396 | *token = ecommunity_token_soo; |
397 | return p; | |
398 | } | |
399 | goto error; | |
718e3744 | 400 | } |
d62a17ae | 401 | goto error; |
718e3744 | 402 | } |
d62a17ae | 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 | */ | |
fefa5e0f | 417 | while (isdigit((unsigned char)*p) || *p == ':' || *p == '.') { |
d62a17ae | 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++; | |
718e3744 | 459 | } |
d62a17ae | 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; | |
718e3744 | 480 | } |
481 | ||
d62a17ae | 482 | /* Convert string to extended community attribute. |
718e3744 | 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" | |
d62a17ae | 492 | type = ECOMMUNITY_ROUTE_TARGET |
493 | keyword_included = 0 | |
718e3744 | 494 | |
495 | "soo 100:1" -> str = "100:1" | |
d62a17ae | 496 | type = ECOMMUNITY_SITE_ORIGIN |
497 | keyword_included = 0 | |
718e3744 | 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" | |
d62a17ae | 505 | type = 0 |
506 | keyword_include = 1 | |
718e3744 | 507 | */ |
d62a17ae | 508 | struct ecommunity *ecommunity_str2com(const char *str, int type, |
509 | int keyword_included) | |
718e3744 | 510 | { |
d62a17ae | 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; | |
718e3744 | 553 | } |
718e3744 | 554 | } |
d62a17ae | 555 | return ecom; |
718e3744 | 556 | } |
557 | ||
91085f97 QY |
558 | static int ecommunity_rt_soo_str(char *buf, size_t bufsz, uint8_t *pnt, |
559 | int type, int sub_type, int format) | |
c5900768 | 560 | { |
d62a17ae | 561 | int len = 0; |
562 | const char *prefix; | |
563 | ||
564 | /* For parse Extended Community attribute tupple. */ | |
5a0ccebf QY |
565 | struct ecommunity_as eas; |
566 | struct ecommunity_ip eip; | |
d62a17ae | 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) { | |
937652c6 | 587 | pnt = ptr_get_be32(pnt, &eas.as); |
d62a17ae | 588 | eas.val = (*pnt++ << 8); |
589 | eas.val |= (*pnt++); | |
590 | ||
91085f97 | 591 | len = snprintf(buf, bufsz, "%s%u:%u", prefix, eas.as, eas.val); |
d62a17ae | 592 | } else if (type == ECOMMUNITY_ENCODE_AS) { |
593 | eas.as = (*pnt++ << 8); | |
594 | eas.as |= (*pnt++); | |
937652c6 | 595 | pnt = ptr_get_be32(pnt, &eas.val); |
d62a17ae | 596 | |
91085f97 | 597 | len = snprintf(buf, bufsz, "%s%u:%u", prefix, eas.as, eas.val); |
d62a17ae | 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 | ||
91085f97 QY |
604 | len = snprintf(buf, bufsz, "%s%s:%u", prefix, inet_ntoa(eip.ip), |
605 | eip.val); | |
d62a17ae | 606 | } |
91085f97 QY |
607 | |
608 | /* consume value */ | |
609 | (void)pnt; | |
d62a17ae | 610 | |
611 | return len; | |
c5900768 | 612 | } |
613 | ||
d62a17ae | 614 | /* Convert extended community attribute to string. |
718e3744 | 615 | |
616 | Due to historical reason of industry standard implementation, there | |
617 | are three types of format. | |
618 | ||
619 | route-map set extcommunity format | |
d62a17ae | 620 | "rt 100:1 100:2" |
621 | "soo 100:3" | |
718e3744 | 622 | |
623 | extcommunity-list | |
d62a17ae | 624 | "rt 100:1 rt 100:2 soo 100:3" |
718e3744 | 625 | |
716b2d8a | 626 | "show [ip] bgp" and extcommunity-list regular expression matching |
d62a17ae | 627 | "RT:100:1 RT:100:2 SoO:100:3" |
718e3744 | 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 | |
e82202b7 | 634 | |
d62a17ae | 635 | Filter is added to display only ECOMMUNITY_ROUTE_TARGET in some cases. |
e82202b7 | 636 | 0 value displays all |
718e3744 | 637 | */ |
d62a17ae | 638 | char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter) |
718e3744 | 639 | { |
d62a17ae | 640 | int i; |
d7c0a89a | 641 | uint8_t *pnt; |
1ef3c51f PG |
642 | uint8_t type = 0; |
643 | uint8_t sub_type = 0; | |
91085f97 | 644 | #define ECOMMUNITY_STRLEN 64 |
d62a17ae | 645 | int str_size; |
d62a17ae | 646 | char *str_buf; |
d62a17ae | 647 | |
91085f97 QY |
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); | |
d62a17ae | 654 | |
91085f97 | 655 | char encbuf[128]; |
d62a17ae | 656 | |
657 | for (i = 0; i < ecom->size; i++) { | |
658 | int unk_ecom = 0; | |
91085f97 | 659 | memset(encbuf, 0x00, sizeof(encbuf)); |
d62a17ae | 660 | |
661 | /* Space between each value. */ | |
91085f97 QY |
662 | if (i > 0) |
663 | strlcat(str_buf, " ", str_size); | |
d62a17ae | 664 | |
91085f97 | 665 | /* Retrieve value field */ |
d62a17ae | 666 | pnt = ecom->val + (i * 8); |
667 | ||
91085f97 | 668 | /* High-order octet is the type */ |
d62a17ae | 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 | |
2551b26e PG |
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); | |
91085f97 QY |
687 | snprintf(encbuf, sizeof(encbuf), |
688 | "NH:%s:%d", ipv4str, pnt[5]); | |
2551b26e PG |
689 | } else |
690 | unk_ecom = 1; | |
91085f97 QY |
691 | } else { |
692 | ecommunity_rt_soo_str(encbuf, sizeof(encbuf), | |
693 | pnt, type, sub_type, | |
694 | format); | |
695 | } | |
d62a17ae | 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); | |
91085f97 QY |
703 | |
704 | snprintf(encbuf, sizeof(encbuf), "ET:%d", | |
705 | tunneltype); | |
996c9314 | 706 | } else if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_DEF_GW) { |
91085f97 QY |
707 | strlcpy(encbuf, "Default Gateway", |
708 | sizeof(encbuf)); | |
709 | } else { | |
d62a17ae | 710 | unk_ecom = 1; |
91085f97 | 711 | } |
d62a17ae | 712 | } else if (type == ECOMMUNITY_ENCODE_EVPN) { |
713 | if (filter == ECOMMUNITY_ROUTE_TARGET) | |
714 | continue; | |
bc59a672 MK |
715 | if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC) { |
716 | struct ethaddr rmac; | |
d62a17ae | 717 | pnt++; |
bc59a672 | 718 | memcpy(&rmac, pnt, ETH_ALEN); |
91085f97 QY |
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]); | |
d62a17ae | 728 | } else if (*pnt |
729 | == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY) { | |
d7c0a89a QY |
730 | uint32_t seqnum; |
731 | uint8_t flags = *++pnt; | |
d62a17ae | 732 | |
733 | memcpy(&seqnum, pnt + 2, 4); | |
734 | seqnum = ntohl(seqnum); | |
91085f97 QY |
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)); | |
5cc359b2 CS |
744 | } else if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_ND) { |
745 | uint8_t flags = *++pnt; | |
746 | ||
91085f97 QY |
747 | if (CHECK_FLAG( |
748 | flags, | |
749 | ECOMMUNITY_EVPN_SUBTYPE_ND_ROUTER_FLAG)) | |
750 | strlcpy(encbuf, "ND:Router Flag", | |
751 | sizeof(encbuf)); | |
d62a17ae | 752 | } else |
753 | unk_ecom = 1; | |
b72220fc PG |
754 | } else if (type == ECOMMUNITY_ENCODE_REDIRECT_IP_NH) { |
755 | sub_type = *pnt++; | |
756 | if (sub_type == ECOMMUNITY_REDIRECT_IP_NH) { | |
91085f97 QY |
757 | snprintf(encbuf, sizeof(encbuf), |
758 | "FS:redirect IP 0x%x", *(pnt + 5)); | |
b72220fc PG |
759 | } else |
760 | unk_ecom = 1; | |
1ef3c51f PG |
761 | } else if (type == ECOMMUNITY_ENCODE_TRANS_EXP || |
762 | type == ECOMMUNITY_EXTENDED_COMMUNITY_PART_2 || | |
763 | type == ECOMMUNITY_EXTENDED_COMMUNITY_PART_3) { | |
a8d72b61 | 764 | sub_type = *pnt++; |
1ef3c51f | 765 | if (sub_type == ECOMMUNITY_REDIRECT_VRF) { |
91085f97 QY |
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); | |
1ef3c51f PG |
774 | } else if (type != ECOMMUNITY_ENCODE_TRANS_EXP) |
775 | unk_ecom = 1; | |
776 | else if (sub_type == ECOMMUNITY_TRAFFIC_ACTION) { | |
a8d72b61 | 777 | char action[64]; |
a8d72b61 PG |
778 | |
779 | if (*(pnt+3) == | |
780 | 1 << FLOWSPEC_TRAFFIC_ACTION_TERMINAL) | |
91085f97 QY |
781 | strlcpy(action, "terminate (apply)", |
782 | sizeof(action)); | |
a8d72b61 | 783 | else |
91085f97 QY |
784 | strlcpy(action, "eval stops", |
785 | sizeof(action)); | |
786 | ||
a8d72b61 PG |
787 | if (*(pnt+3) == |
788 | 1 << FLOWSPEC_TRAFFIC_ACTION_SAMPLE) | |
91085f97 QY |
789 | strlcat(action, ", sample", |
790 | sizeof(action)); | |
791 | ||
792 | ||
793 | snprintf(encbuf, sizeof(encbuf), "FS:action %s", | |
794 | action); | |
a8d72b61 PG |
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); | |
91085f97 QY |
802 | snprintf(encbuf, sizeof(encbuf), "FS:rate %f", |
803 | data.rate_float); | |
a8d72b61 | 804 | } else if (sub_type == ECOMMUNITY_TRAFFIC_MARKING) { |
91085f97 QY |
805 | snprintf(encbuf, sizeof(encbuf), |
806 | "FS:marking %u", *(pnt + 5)); | |
50f74cf1 | 807 | } else if (*pnt |
808 | == ECOMMUNITY_EVPN_SUBTYPE_ES_IMPORT_RT) { | |
809 | struct ethaddr mac; | |
2bb9eff4 | 810 | |
50f74cf1 | 811 | memcpy(&mac, pnt, ETH_ALEN); |
91085f97 QY |
812 | |
813 | snprintf( | |
814 | encbuf, sizeof(encbuf), | |
50f74cf1 | 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]); | |
a8d72b61 PG |
822 | } else |
823 | unk_ecom = 1; | |
1ef3c51f PG |
824 | } else { |
825 | sub_type = *pnt++; | |
d62a17ae | 826 | unk_ecom = 1; |
1ef3c51f | 827 | } |
d62a17ae | 828 | |
829 | if (unk_ecom) | |
91085f97 QY |
830 | snprintf(encbuf, sizeof(encbuf), "UNK:%d, %d", type, |
831 | sub_type); | |
d62a17ae | 832 | |
91085f97 QY |
833 | int r = strlcat(str_buf, encbuf, str_size); |
834 | assert(r < str_size); | |
94431dbc C |
835 | } |
836 | ||
d62a17ae | 837 | return str_buf; |
718e3744 | 838 | } |
4372df71 | 839 | |
3dc339cd DA |
840 | bool ecommunity_match(const struct ecommunity *ecom1, |
841 | const struct ecommunity *ecom2) | |
4372df71 | 842 | { |
d62a17ae | 843 | int i = 0; |
844 | int j = 0; | |
845 | ||
846 | if (ecom1 == NULL && ecom2 == NULL) | |
3dc339cd | 847 | return true; |
d62a17ae | 848 | |
849 | if (ecom1 == NULL || ecom2 == NULL) | |
3dc339cd | 850 | return false; |
d62a17ae | 851 | |
852 | if (ecom1->size < ecom2->size) | |
3dc339cd | 853 | return false; |
d62a17ae | 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) | |
3dc339cd | 865 | return true; |
d62a17ae | 866 | else |
3dc339cd | 867 | return false; |
4372df71 | 868 | } |
1e27ef50 PG |
869 | |
870 | /* return first occurence of type */ | |
d62a17ae | 871 | extern struct ecommunity_val *ecommunity_lookup(const struct ecommunity *ecom, |
872 | uint8_t type, uint8_t subtype) | |
1e27ef50 | 873 | { |
d7c0a89a | 874 | uint8_t *p; |
d62a17ae | 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; | |
1e27ef50 PG |
887 | } |
888 | ||
889 | /* remove ext. community matching type and subtype | |
890 | * return 1 on success ( removed ), 0 otherwise (not present) | |
891 | */ | |
3dc339cd DA |
892 | extern bool ecommunity_strip(struct ecommunity *ecom, uint8_t type, |
893 | uint8_t subtype) | |
1e27ef50 | 894 | { |
003bc275 | 895 | uint8_t *p, *q, *new; |
d62a17ae | 896 | int c, found = 0; |
897 | /* When this is fist value, just add it. */ | |
3dc339cd DA |
898 | if (ecom == NULL || ecom->val == NULL) |
899 | return false; | |
d62a17ae | 900 | |
003bc275 | 901 | /* Check if any existing ext community matches. */ |
902 | /* Certain extended communities like the Route Target can be present | |
903 | * multiple times, handle that. | |
904 | */ | |
d62a17ae | 905 | c = 0; |
906 | for (p = ecom->val; c < ecom->size; p += ECOMMUNITY_SIZE, c++) { | |
003bc275 | 907 | if (p[0] == type && p[1] == subtype) |
908 | found++; | |
d62a17ae | 909 | } |
003bc275 | 910 | /* If no matching ext community exists, return. */ |
d62a17ae | 911 | if (found == 0) |
3dc339cd | 912 | return false; |
003bc275 | 913 | |
914 | /* Handle the case where everything needs to be stripped. */ | |
915 | if (found == ecom->size) { | |
916 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
917 | ecom->size = 0; | |
3dc339cd | 918 | return true; |
003bc275 | 919 | } |
920 | ||
921 | /* Strip matching ext community(ies). */ | |
922 | new = XMALLOC(MTYPE_ECOMMUNITY_VAL, | |
923 | (ecom->size - found) * ECOMMUNITY_SIZE); | |
924 | q = new; | |
925 | for (c = 0, p = ecom->val; c < ecom->size; c++, p += ECOMMUNITY_SIZE) { | |
926 | if (!(p[0] == type && p[1] == subtype)) { | |
927 | memcpy(q, p, ECOMMUNITY_SIZE); | |
928 | q += ECOMMUNITY_SIZE; | |
929 | } | |
930 | } | |
931 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
932 | ecom->val = new; | |
933 | ecom->size -= found; | |
3dc339cd | 934 | return true; |
1e27ef50 | 935 | } |
44338987 | 936 | |
937 | /* | |
938 | * Remove specified extended community value from extended community. | |
939 | * Returns 1 if value was present (and hence, removed), 0 otherwise. | |
940 | */ | |
3dc339cd | 941 | bool ecommunity_del_val(struct ecommunity *ecom, struct ecommunity_val *eval) |
44338987 | 942 | { |
f27f864e | 943 | uint8_t *p; |
44338987 | 944 | int c, found = 0; |
945 | ||
946 | /* Make sure specified value exists. */ | |
947 | if (ecom == NULL || ecom->val == NULL) | |
3dc339cd | 948 | return false; |
44338987 | 949 | c = 0; |
950 | for (p = ecom->val; c < ecom->size; p += ECOMMUNITY_SIZE, c++) { | |
951 | if (!memcmp(p, eval->val, ECOMMUNITY_SIZE)) { | |
952 | found = 1; | |
953 | break; | |
954 | } | |
955 | } | |
956 | if (found == 0) | |
3dc339cd | 957 | return false; |
44338987 | 958 | |
959 | /* Delete the selected value */ | |
960 | ecom->size--; | |
961 | p = XMALLOC(MTYPE_ECOMMUNITY_VAL, ecom->size * ECOMMUNITY_SIZE); | |
962 | if (c != 0) | |
963 | memcpy(p, ecom->val, c * ECOMMUNITY_SIZE); | |
964 | if ((ecom->size - c) != 0) | |
965 | memcpy(p + (c)*ECOMMUNITY_SIZE, | |
966 | ecom->val + (c + 1) * ECOMMUNITY_SIZE, | |
967 | (ecom->size - c) * ECOMMUNITY_SIZE); | |
e6a6870b | 968 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); |
44338987 | 969 | ecom->val = p; |
3dc339cd | 970 | return true; |
44338987 | 971 | } |
dacf6ec1 PG |
972 | |
973 | int ecommunity_fill_pbr_action(struct ecommunity_val *ecom_eval, | |
974 | struct bgp_pbr_entry_action *api) | |
975 | { | |
976 | if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_RATE) { | |
977 | api->action = ACTION_TRAFFICRATE; | |
978 | api->u.r.rate_info[3] = ecom_eval->val[4]; | |
979 | api->u.r.rate_info[2] = ecom_eval->val[5]; | |
980 | api->u.r.rate_info[1] = ecom_eval->val[6]; | |
981 | api->u.r.rate_info[0] = ecom_eval->val[7]; | |
982 | } else if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_ACTION) { | |
983 | api->action = ACTION_TRAFFIC_ACTION; | |
984 | /* else distribute code is set by default */ | |
985 | if (ecom_eval->val[5] & (1 << FLOWSPEC_TRAFFIC_ACTION_TERMINAL)) | |
986 | api->u.za.filter |= TRAFFIC_ACTION_TERMINATE; | |
987 | else | |
988 | api->u.za.filter |= TRAFFIC_ACTION_DISTRIBUTE; | |
989 | if (ecom_eval->val[5] == 1 << FLOWSPEC_TRAFFIC_ACTION_SAMPLE) | |
990 | api->u.za.filter |= TRAFFIC_ACTION_SAMPLE; | |
991 | ||
992 | } else if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_MARKING) { | |
993 | api->action = ACTION_MARKING; | |
994 | api->u.marking_dscp = ecom_eval->val[7]; | |
995 | } else if (ecom_eval->val[1] == ECOMMUNITY_REDIRECT_VRF) { | |
996 | /* must use external function */ | |
997 | return 0; | |
998 | } else if (ecom_eval->val[1] == ECOMMUNITY_REDIRECT_IP_NH) { | |
999 | /* see draft-ietf-idr-flowspec-redirect-ip-02 | |
1000 | * Q1: how come a ext. community can host ipv6 address | |
1001 | * Q2 : from cisco documentation: | |
1002 | * Announces the reachability of one or more flowspec NLRI. | |
1003 | * When a BGP speaker receives an UPDATE message with the | |
1004 | * redirect-to-IP extended community, it is expected to | |
1005 | * create a traffic filtering rule for every flow-spec | |
1006 | * NLRI in the message that has this path as its best | |
1007 | * path. The filter entry matches the IP packets | |
1008 | * described in the NLRI field and redirects them or | |
1009 | * copies them towards the IPv4 or IPv6 address specified | |
1010 | * in the 'Network Address of Next- Hop' | |
1011 | * field of the associated MP_REACH_NLRI. | |
1012 | */ | |
1013 | struct ecommunity_ip *ip_ecom = (struct ecommunity_ip *) | |
1014 | ecom_eval + 2; | |
1015 | ||
1016 | api->u.zr.redirect_ip_v4 = ip_ecom->ip; | |
1017 | } else | |
1018 | return -1; | |
1019 | return 0; | |
1020 | } | |
5b820d9e NT |
1021 | |
1022 | static struct ecommunity *bgp_aggr_ecommunity_lookup( | |
1023 | struct bgp_aggregate *aggregate, | |
1024 | struct ecommunity *ecommunity) | |
1025 | { | |
1026 | return hash_lookup(aggregate->ecommunity_hash, ecommunity); | |
1027 | } | |
1028 | ||
1029 | static void *bgp_aggr_ecommunty_hash_alloc(void *p) | |
1030 | { | |
1031 | struct ecommunity *ref = (struct ecommunity *)p; | |
1032 | struct ecommunity *ecommunity = NULL; | |
1033 | ||
1034 | ecommunity = ecommunity_dup(ref); | |
1035 | return ecommunity; | |
1036 | } | |
1037 | ||
7f5818fb | 1038 | static void bgp_aggr_ecommunity_prepare(struct hash_bucket *hb, void *arg) |
5b820d9e | 1039 | { |
5b820d9e NT |
1040 | struct ecommunity *hb_ecommunity = hb->data; |
1041 | struct ecommunity **aggr_ecommunity = arg; | |
1042 | ||
4edd83f9 | 1043 | if (*aggr_ecommunity) |
1044 | *aggr_ecommunity = ecommunity_merge(*aggr_ecommunity, | |
1045 | hb_ecommunity); | |
1046 | else | |
5b820d9e NT |
1047 | *aggr_ecommunity = ecommunity_dup(hb_ecommunity); |
1048 | } | |
1049 | ||
1050 | void bgp_aggr_ecommunity_remove(void *arg) | |
1051 | { | |
1052 | struct ecommunity *ecommunity = arg; | |
1053 | ||
1054 | ecommunity_free(&ecommunity); | |
1055 | } | |
1056 | ||
1057 | void bgp_compute_aggregate_ecommunity(struct bgp_aggregate *aggregate, | |
1058 | struct ecommunity *ecommunity) | |
4edd83f9 | 1059 | { |
1060 | bgp_compute_aggregate_ecommunity_hash(aggregate, ecommunity); | |
1061 | bgp_compute_aggregate_ecommunity_val(aggregate); | |
1062 | } | |
1063 | ||
1064 | ||
1065 | void bgp_compute_aggregate_ecommunity_hash(struct bgp_aggregate *aggregate, | |
1066 | struct ecommunity *ecommunity) | |
5b820d9e NT |
1067 | { |
1068 | struct ecommunity *aggr_ecommunity = NULL; | |
1069 | ||
1070 | if ((aggregate == NULL) || (ecommunity == NULL)) | |
1071 | return; | |
1072 | ||
1073 | /* Create hash if not already created. | |
1074 | */ | |
1075 | if (aggregate->ecommunity_hash == NULL) | |
1076 | aggregate->ecommunity_hash = hash_create( | |
1077 | ecommunity_hash_make, ecommunity_cmp, | |
1078 | "BGP Aggregator ecommunity hash"); | |
1079 | ||
1080 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1081 | if (aggr_ecommunity == NULL) { | |
1082 | /* Insert ecommunity into hash. | |
1083 | */ | |
1084 | aggr_ecommunity = hash_get(aggregate->ecommunity_hash, | |
1085 | ecommunity, | |
1086 | bgp_aggr_ecommunty_hash_alloc); | |
4edd83f9 | 1087 | } |
5b820d9e | 1088 | |
4edd83f9 | 1089 | /* Increment reference counter. |
1090 | */ | |
1091 | aggr_ecommunity->refcnt++; | |
1092 | } | |
5b820d9e | 1093 | |
4edd83f9 | 1094 | void bgp_compute_aggregate_ecommunity_val(struct bgp_aggregate *aggregate) |
1095 | { | |
1096 | struct ecommunity *ecommerge = NULL; | |
1097 | ||
1098 | if (aggregate == NULL) | |
1099 | return; | |
1100 | ||
1101 | /* Re-compute aggregate's ecommunity. | |
1102 | */ | |
1103 | if (aggregate->ecommunity) | |
1104 | ecommunity_free(&aggregate->ecommunity); | |
1105 | if (aggregate->ecommunity_hash | |
1106 | && aggregate->ecommunity_hash->count) { | |
5b820d9e NT |
1107 | hash_iterate(aggregate->ecommunity_hash, |
1108 | bgp_aggr_ecommunity_prepare, | |
1109 | &aggregate->ecommunity); | |
4edd83f9 | 1110 | ecommerge = aggregate->ecommunity; |
1111 | aggregate->ecommunity = ecommunity_uniq_sort(ecommerge); | |
1112 | if (ecommerge) | |
1113 | ecommunity_free(&ecommerge); | |
5b820d9e | 1114 | } |
5b820d9e NT |
1115 | } |
1116 | ||
1117 | void bgp_remove_ecommunity_from_aggregate(struct bgp_aggregate *aggregate, | |
1118 | struct ecommunity *ecommunity) | |
1119 | { | |
1120 | struct ecommunity *aggr_ecommunity = NULL; | |
1121 | struct ecommunity *ret_ecomm = NULL; | |
1122 | ||
4edd83f9 | 1123 | if ((!aggregate) |
1124 | || (!aggregate->ecommunity_hash) | |
1125 | || (!ecommunity)) | |
5b820d9e NT |
1126 | return; |
1127 | ||
1128 | /* Look-up the ecommunity in the hash. | |
1129 | */ | |
1130 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1131 | if (aggr_ecommunity) { | |
1132 | aggr_ecommunity->refcnt--; | |
1133 | ||
1134 | if (aggr_ecommunity->refcnt == 0) { | |
1135 | ret_ecomm = hash_release(aggregate->ecommunity_hash, | |
1136 | aggr_ecommunity); | |
1137 | ecommunity_free(&ret_ecomm); | |
4edd83f9 | 1138 | bgp_compute_aggregate_ecommunity_val(aggregate); |
1139 | } | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | void bgp_remove_ecomm_from_aggregate_hash(struct bgp_aggregate *aggregate, | |
1144 | struct ecommunity *ecommunity) | |
1145 | { | |
1146 | ||
1147 | struct ecommunity *aggr_ecommunity = NULL; | |
1148 | struct ecommunity *ret_ecomm = NULL; | |
5b820d9e | 1149 | |
4edd83f9 | 1150 | if ((!aggregate) |
1151 | || (!aggregate->ecommunity_hash) | |
1152 | || (!ecommunity)) | |
1153 | return; | |
5b820d9e | 1154 | |
4edd83f9 | 1155 | /* Look-up the ecommunity in the hash. |
1156 | */ | |
1157 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1158 | if (aggr_ecommunity) { | |
1159 | aggr_ecommunity->refcnt--; | |
1160 | ||
1161 | if (aggr_ecommunity->refcnt == 0) { | |
1162 | ret_ecomm = hash_release(aggregate->ecommunity_hash, | |
1163 | aggr_ecommunity); | |
1164 | ecommunity_free(&ret_ecomm); | |
5b820d9e NT |
1165 | } |
1166 | } | |
1167 | } |