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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 | |
23d0a753 DA |
32 | #include "lib/printfrr.h" |
33 | ||
718e3744 | 34 | #include "bgpd/bgpd.h" |
35 | #include "bgpd/bgp_ecommunity.h" | |
57d187bc | 36 | #include "bgpd/bgp_lcommunity.h" |
0b2aa3a0 | 37 | #include "bgpd/bgp_aspath.h" |
a8d72b61 | 38 | #include "bgpd/bgp_flowspec_private.h" |
dacf6ec1 | 39 | #include "bgpd/bgp_pbr.h" |
a8d72b61 PG |
40 | |
41 | /* struct used to dump the rate contained in FS set traffic-rate EC */ | |
42 | union traffic_rate { | |
43 | float rate_float; | |
44 | uint8_t rate_byte[4]; | |
45 | }; | |
718e3744 | 46 | |
47 | /* Hash of community attribute. */ | |
ffa4e2c4 | 48 | static struct hash *ecomhash; |
6b0655a2 | 49 | |
718e3744 | 50 | /* Allocate a new ecommunities. */ |
d62a17ae | 51 | struct ecommunity *ecommunity_new(void) |
718e3744 | 52 | { |
9a659715 PG |
53 | struct ecommunity *ecom; |
54 | ||
55 | ecom = (struct ecommunity *)XCALLOC(MTYPE_ECOMMUNITY, | |
56 | sizeof(struct ecommunity)); | |
57 | ecom->unit_size = ECOMMUNITY_SIZE; | |
58 | return ecom; | |
718e3744 | 59 | } |
60 | ||
c7ee6c35 DS |
61 | void ecommunity_strfree(char **s) |
62 | { | |
63 | XFREE(MTYPE_ECOMMUNITY_STR, *s); | |
64 | } | |
65 | ||
3b7e8d0f | 66 | /* Free ecommunities. */ |
d62a17ae | 67 | void ecommunity_free(struct ecommunity **ecom) |
718e3744 | 68 | { |
2c15754e JC |
69 | if (!(*ecom)) |
70 | return; | |
71 | ||
0a22ddfb QY |
72 | XFREE(MTYPE_ECOMMUNITY_VAL, (*ecom)->val); |
73 | XFREE(MTYPE_ECOMMUNITY_STR, (*ecom)->str); | |
d62a17ae | 74 | XFREE(MTYPE_ECOMMUNITY, *ecom); |
718e3744 | 75 | } |
76 | ||
d62a17ae | 77 | static void ecommunity_hash_free(struct ecommunity *ecom) |
7bae2fb9 | 78 | { |
d62a17ae | 79 | ecommunity_free(&ecom); |
7bae2fb9 LB |
80 | } |
81 | ||
82 | ||
718e3744 | 83 | /* Add a new Extended Communities value to Extended Communities |
84 | Attribute structure. When the value is already exists in the | |
85 | structure, we don't add the value. Newly added value is sorted by | |
86 | numerical order. When the value is added to the structure return 1 | |
1207a5bc | 87 | else return 0. |
88 | The additional parameters 'unique' and 'overwrite' ensure a particular | |
89 | extended community (based on type and sub-type) is present only | |
90 | once and whether the new value should replace what is existing or | |
91 | not. | |
92 | */ | |
4371bf91 PG |
93 | static bool ecommunity_add_val_internal(struct ecommunity *ecom, |
94 | const void *eval, | |
95 | bool unique, bool overwrite, | |
96 | uint8_t ecom_size) | |
718e3744 | 97 | { |
f6e07e1b | 98 | uint32_t c, ins_idx; |
9a659715 | 99 | const struct ecommunity_val *eval4 = (struct ecommunity_val *)eval; |
4371bf91 PG |
100 | const struct ecommunity_val_ipv6 *eval6 = |
101 | (struct ecommunity_val_ipv6 *)eval; | |
d62a17ae | 102 | |
91085f97 | 103 | /* When this is fist value, just add it. */ |
d62a17ae | 104 | if (ecom->val == NULL) { |
91085f97 | 105 | ecom->size = 1; |
9a659715 PG |
106 | ecom->val = XMALLOC(MTYPE_ECOMMUNITY_VAL, |
107 | ecom_length_size(ecom, ecom_size)); | |
108 | memcpy(ecom->val, eval, ecom_size); | |
3dc339cd | 109 | return true; |
d62a17ae | 110 | } |
111 | ||
112 | /* If the value already exists in the structure return 0. */ | |
1207a5bc | 113 | /* check also if the extended community itself exists. */ |
d62a17ae | 114 | c = 0; |
9a659715 | 115 | |
f6e07e1b | 116 | ins_idx = UINT32_MAX; |
91085f97 | 117 | for (uint8_t *p = ecom->val; c < ecom->size; |
9a659715 | 118 | p += ecom_size, c++) { |
1207a5bc | 119 | if (unique) { |
9a659715 PG |
120 | if (ecom_size == ECOMMUNITY_SIZE) { |
121 | if (p[0] == eval4->val[0] && | |
122 | p[1] == eval4->val[1]) { | |
123 | if (overwrite) { | |
4371bf91 PG |
124 | memcpy(p, eval4->val, |
125 | ecom_size); | |
9a659715 PG |
126 | return true; |
127 | } | |
128 | return false; | |
129 | } | |
130 | } else { | |
131 | if (p[0] == eval6->val[0] && | |
132 | p[1] == eval6->val[1]) { | |
133 | if (overwrite) { | |
4371bf91 PG |
134 | memcpy(p, eval6->val, |
135 | ecom_size); | |
9a659715 PG |
136 | return true; |
137 | } | |
138 | return false; | |
1207a5bc | 139 | } |
1207a5bc | 140 | } |
141 | } | |
9a659715 | 142 | int ret = memcmp(p, eval, ecom_size); |
d62a17ae | 143 | if (ret == 0) |
e2369003 | 144 | return false; |
1207a5bc | 145 | if (ret > 0) { |
146 | if (!unique) | |
147 | break; | |
f6e07e1b | 148 | if (ins_idx == UINT32_MAX) |
1207a5bc | 149 | ins_idx = c; |
150 | } | |
d62a17ae | 151 | } |
152 | ||
f6e07e1b | 153 | if (ins_idx == UINT32_MAX) |
1207a5bc | 154 | ins_idx = c; |
155 | ||
d62a17ae | 156 | /* Add the value to the structure with numerical sorting. */ |
157 | ecom->size++; | |
91085f97 | 158 | ecom->val = XREALLOC(MTYPE_ECOMMUNITY_VAL, ecom->val, |
9a659715 PG |
159 | ecom_length_size(ecom, ecom_size)); |
160 | ||
9a659715 PG |
161 | memmove(ecom->val + ((ins_idx + 1) * ecom_size), |
162 | ecom->val + (ins_idx * ecom_size), | |
163 | (ecom->size - 1 - ins_idx) * ecom_size); | |
164 | memcpy(ecom->val + (ins_idx * ecom_size), | |
165 | eval, ecom_size); | |
d62a17ae | 166 | |
3dc339cd | 167 | return true; |
718e3744 | 168 | } |
169 | ||
9a659715 | 170 | /* Add a new Extended Communities value to Extended Communities |
4371bf91 PG |
171 | * Attribute structure. When the value is already exists in the |
172 | * structure, we don't add the value. Newly added value is sorted by | |
173 | * numerical order. When the value is added to the structure return 1 | |
174 | * else return 0. | |
175 | */ | |
9a659715 PG |
176 | bool ecommunity_add_val(struct ecommunity *ecom, struct ecommunity_val *eval, |
177 | bool unique, bool overwrite) | |
178 | { | |
179 | return ecommunity_add_val_internal(ecom, (const void *)eval, unique, | |
180 | overwrite, ECOMMUNITY_SIZE); | |
181 | } | |
182 | ||
4371bf91 PG |
183 | bool ecommunity_add_val_ipv6(struct ecommunity *ecom, |
184 | struct ecommunity_val_ipv6 *eval, | |
185 | bool unique, bool overwrite) | |
9a659715 PG |
186 | { |
187 | return ecommunity_add_val_internal(ecom, (const void *)eval, unique, | |
188 | overwrite, IPV6_ECOMMUNITY_SIZE); | |
189 | } | |
190 | ||
191 | static struct ecommunity * | |
192 | ecommunity_uniq_sort_internal(struct ecommunity *ecom, | |
193 | unsigned short ecom_size) | |
718e3744 | 194 | { |
f6e07e1b | 195 | uint32_t i; |
d62a17ae | 196 | struct ecommunity *new; |
9a659715 | 197 | const void *eval; |
d62a17ae | 198 | |
199 | if (!ecom) | |
200 | return NULL; | |
201 | ||
202 | new = ecommunity_new(); | |
9a659715 | 203 | new->unit_size = ecom_size; |
27aa23a4 | 204 | new->disable_ieee_floating = ecom->disable_ieee_floating; |
d62a17ae | 205 | |
206 | for (i = 0; i < ecom->size; i++) { | |
8f242187 | 207 | eval = (void *)(ecom->val + (i * ecom_size)); |
9a659715 | 208 | ecommunity_add_val_internal(new, eval, false, false, ecom_size); |
d62a17ae | 209 | } |
210 | return new; | |
718e3744 | 211 | } |
212 | ||
9a659715 | 213 | /* This function takes pointer to Extended Communites strucutre then |
4371bf91 PG |
214 | * create a new Extended Communities structure by uniq and sort each |
215 | * Extended Communities value. | |
216 | */ | |
9a659715 PG |
217 | struct ecommunity *ecommunity_uniq_sort(struct ecommunity *ecom) |
218 | { | |
219 | return ecommunity_uniq_sort_internal(ecom, ECOMMUNITY_SIZE); | |
220 | } | |
221 | ||
718e3744 | 222 | /* Parse Extended Communites Attribute in BGP packet. */ |
9a659715 | 223 | static struct ecommunity *ecommunity_parse_internal(uint8_t *pnt, |
27aa23a4 DA |
224 | unsigned short length, |
225 | unsigned short size_ecom, | |
226 | bool disable_ieee_floating) | |
718e3744 | 227 | { |
d62a17ae | 228 | struct ecommunity tmp; |
229 | struct ecommunity *new; | |
718e3744 | 230 | |
d62a17ae | 231 | /* Length check. */ |
9a659715 | 232 | if (length % size_ecom) |
d62a17ae | 233 | return NULL; |
718e3744 | 234 | |
d62a17ae | 235 | /* Prepare tmporary structure for making a new Extended Communities |
236 | Attribute. */ | |
9a659715 | 237 | tmp.size = length / size_ecom; |
d62a17ae | 238 | tmp.val = pnt; |
27aa23a4 | 239 | tmp.disable_ieee_floating = disable_ieee_floating; |
718e3744 | 240 | |
d62a17ae | 241 | /* Create a new Extended Communities Attribute by uniq and sort each |
242 | Extended Communities value */ | |
9a659715 | 243 | new = ecommunity_uniq_sort_internal(&tmp, size_ecom); |
718e3744 | 244 | |
d62a17ae | 245 | return ecommunity_intern(new); |
718e3744 | 246 | } |
247 | ||
27aa23a4 DA |
248 | struct ecommunity *ecommunity_parse(uint8_t *pnt, unsigned short length, |
249 | bool disable_ieee_floating) | |
9a659715 | 250 | { |
27aa23a4 DA |
251 | return ecommunity_parse_internal(pnt, length, ECOMMUNITY_SIZE, |
252 | disable_ieee_floating); | |
9a659715 PG |
253 | } |
254 | ||
27aa23a4 DA |
255 | struct ecommunity *ecommunity_parse_ipv6(uint8_t *pnt, unsigned short length, |
256 | bool disable_ieee_floating) | |
9a659715 | 257 | { |
27aa23a4 DA |
258 | return ecommunity_parse_internal(pnt, length, IPV6_ECOMMUNITY_SIZE, |
259 | disable_ieee_floating); | |
9a659715 PG |
260 | } |
261 | ||
718e3744 | 262 | /* Duplicate the Extended Communities Attribute structure. */ |
d62a17ae | 263 | struct ecommunity *ecommunity_dup(struct ecommunity *ecom) |
718e3744 | 264 | { |
d62a17ae | 265 | struct ecommunity *new; |
266 | ||
267 | new = XCALLOC(MTYPE_ECOMMUNITY, sizeof(struct ecommunity)); | |
268 | new->size = ecom->size; | |
9a659715 | 269 | new->unit_size = ecom->unit_size; |
d62a17ae | 270 | if (new->size) { |
271 | new->val = XMALLOC(MTYPE_ECOMMUNITY_VAL, | |
9a659715 | 272 | ecom->size * ecom->unit_size); |
8da920d3 DS |
273 | memcpy(new->val, ecom->val, |
274 | (size_t)ecom->size * (size_t)ecom->unit_size); | |
d62a17ae | 275 | } else |
276 | new->val = NULL; | |
277 | return new; | |
718e3744 | 278 | } |
279 | ||
639caccf | 280 | /* Return string representation of ecommunities attribute. */ |
d62a17ae | 281 | char *ecommunity_str(struct ecommunity *ecom) |
4372df71 | 282 | { |
d62a17ae | 283 | if (!ecom->str) |
284 | ecom->str = | |
285 | ecommunity_ecom2str(ecom, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
286 | return ecom->str; | |
4372df71 | 287 | } |
288 | ||
718e3744 | 289 | /* Merge two Extended Communities Attribute structure. */ |
d62a17ae | 290 | struct ecommunity *ecommunity_merge(struct ecommunity *ecom1, |
291 | struct ecommunity *ecom2) | |
718e3744 | 292 | { |
0b04fa0e DS |
293 | ecom1->val = XREALLOC(MTYPE_ECOMMUNITY_VAL, ecom1->val, |
294 | (size_t)(ecom1->size + ecom2->size) | |
295 | * (size_t)ecom1->unit_size); | |
d62a17ae | 296 | |
9a659715 | 297 | memcpy(ecom1->val + (ecom1->size * ecom1->unit_size), ecom2->val, |
8da920d3 | 298 | (size_t)ecom2->size * (size_t)ecom1->unit_size); |
d62a17ae | 299 | ecom1->size += ecom2->size; |
300 | ||
301 | return ecom1; | |
718e3744 | 302 | } |
303 | ||
304 | /* Intern Extended Communities Attribute. */ | |
d62a17ae | 305 | struct ecommunity *ecommunity_intern(struct ecommunity *ecom) |
718e3744 | 306 | { |
d62a17ae | 307 | struct ecommunity *find; |
718e3744 | 308 | |
d62a17ae | 309 | assert(ecom->refcnt == 0); |
d62a17ae | 310 | find = (struct ecommunity *)hash_get(ecomhash, ecom, hash_alloc_intern); |
d62a17ae | 311 | if (find != ecom) |
312 | ecommunity_free(&ecom); | |
718e3744 | 313 | |
d62a17ae | 314 | find->refcnt++; |
718e3744 | 315 | |
d62a17ae | 316 | if (!find->str) |
317 | find->str = | |
318 | ecommunity_ecom2str(find, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
718e3744 | 319 | |
d62a17ae | 320 | return find; |
718e3744 | 321 | } |
322 | ||
323 | /* Unintern Extended Communities Attribute. */ | |
d62a17ae | 324 | void ecommunity_unintern(struct ecommunity **ecom) |
718e3744 | 325 | { |
d62a17ae | 326 | struct ecommunity *ret; |
327 | ||
df7d4670 DS |
328 | if (!*ecom) |
329 | return; | |
330 | ||
d62a17ae | 331 | if ((*ecom)->refcnt) |
332 | (*ecom)->refcnt--; | |
333 | ||
334 | /* Pull off from hash. */ | |
335 | if ((*ecom)->refcnt == 0) { | |
336 | /* Extended community must be in the hash. */ | |
337 | ret = (struct ecommunity *)hash_release(ecomhash, *ecom); | |
338 | assert(ret != NULL); | |
339 | ||
340 | ecommunity_free(ecom); | |
341 | } | |
718e3744 | 342 | } |
343 | ||
344 | /* Utinity function to make hash key. */ | |
d8b87afe | 345 | unsigned int ecommunity_hash_make(const void *arg) |
718e3744 | 346 | { |
d62a17ae | 347 | const struct ecommunity *ecom = arg; |
9a659715 | 348 | int size = ecom->size * ecom->unit_size; |
d62a17ae | 349 | |
3f65c5b1 | 350 | return jhash(ecom->val, size, 0x564321ab); |
718e3744 | 351 | } |
352 | ||
353 | /* Compare two Extended Communities Attribute structure. */ | |
74df8d6d | 354 | bool ecommunity_cmp(const void *arg1, const void *arg2) |
718e3744 | 355 | { |
d62a17ae | 356 | const struct ecommunity *ecom1 = arg1; |
357 | const struct ecommunity *ecom2 = arg2; | |
358 | ||
359 | if (ecom1 == NULL && ecom2 == NULL) | |
74df8d6d | 360 | return true; |
813d4307 | 361 | |
d62a17ae | 362 | if (ecom1 == NULL || ecom2 == NULL) |
74df8d6d | 363 | return false; |
813d4307 | 364 | |
9a659715 PG |
365 | if (ecom1->unit_size != ecom2->unit_size) |
366 | return false; | |
367 | ||
d62a17ae | 368 | return (ecom1->size == ecom2->size |
9a659715 PG |
369 | && memcmp(ecom1->val, ecom2->val, ecom1->size * |
370 | ecom1->unit_size) == 0); | |
718e3744 | 371 | } |
372 | ||
373 | /* Initialize Extended Comminities related hash. */ | |
d62a17ae | 374 | void ecommunity_init(void) |
718e3744 | 375 | { |
996c9314 | 376 | ecomhash = hash_create(ecommunity_hash_make, ecommunity_cmp, |
3f65c5b1 | 377 | "BGP ecommunity hash"); |
718e3744 | 378 | } |
228da428 | 379 | |
d62a17ae | 380 | void ecommunity_finish(void) |
228da428 | 381 | { |
d62a17ae | 382 | hash_clean(ecomhash, (void (*)(void *))ecommunity_hash_free); |
383 | hash_free(ecomhash); | |
384 | ecomhash = NULL; | |
228da428 | 385 | } |
6b0655a2 | 386 | |
718e3744 | 387 | /* Extended Communities token enum. */ |
d62a17ae | 388 | enum ecommunity_token { |
389 | ecommunity_token_unknown = 0, | |
390 | ecommunity_token_rt, | |
391 | ecommunity_token_soo, | |
392 | ecommunity_token_val, | |
9a659715 PG |
393 | ecommunity_token_rt6, |
394 | ecommunity_token_val6, | |
718e3744 | 395 | }; |
396 | ||
9a659715 PG |
397 | static int ecommunity_encode_internal(uint8_t type, uint8_t sub_type, |
398 | int trans, as_t as, | |
399 | struct in_addr *ip, | |
400 | struct in6_addr *ip6, | |
401 | uint32_t val, | |
402 | void *eval_ptr) | |
c5900768 | 403 | { |
9a659715 PG |
404 | struct ecommunity_val *eval = (struct ecommunity_val *)eval_ptr; |
405 | struct ecommunity_val_ipv6 *eval6 = | |
406 | (struct ecommunity_val_ipv6 *)eval_ptr; | |
407 | ||
d62a17ae | 408 | assert(eval); |
409 | if (type == ECOMMUNITY_ENCODE_AS) { | |
410 | if (as > BGP_AS_MAX) | |
411 | return -1; | |
412 | } else if (type == ECOMMUNITY_ENCODE_IP | |
413 | || type == ECOMMUNITY_ENCODE_AS4) { | |
414 | if (val > UINT16_MAX) | |
415 | return -1; | |
9a659715 PG |
416 | } else if (type == ECOMMUNITY_ENCODE_TRANS_EXP && |
417 | sub_type == ECOMMUNITY_FLOWSPEC_REDIRECT_IPV6 && | |
418 | (!ip6 || val > UINT16_MAX)) { | |
419 | return -1; | |
d62a17ae | 420 | } |
421 | ||
422 | /* Fill in the values. */ | |
423 | eval->val[0] = type; | |
424 | if (!trans) | |
425 | eval->val[0] |= ECOMMUNITY_FLAG_NON_TRANSITIVE; | |
426 | eval->val[1] = sub_type; | |
427 | if (type == ECOMMUNITY_ENCODE_AS) { | |
428 | eval->val[2] = (as >> 8) & 0xff; | |
429 | eval->val[3] = as & 0xff; | |
430 | eval->val[4] = (val >> 24) & 0xff; | |
431 | eval->val[5] = (val >> 16) & 0xff; | |
432 | eval->val[6] = (val >> 8) & 0xff; | |
433 | eval->val[7] = val & 0xff; | |
434 | } else if (type == ECOMMUNITY_ENCODE_IP) { | |
9a659715 | 435 | memcpy(&eval->val[2], ip, sizeof(struct in_addr)); |
d62a17ae | 436 | eval->val[6] = (val >> 8) & 0xff; |
437 | eval->val[7] = val & 0xff; | |
9a659715 PG |
438 | } else if (type == ECOMMUNITY_ENCODE_TRANS_EXP && |
439 | sub_type == ECOMMUNITY_FLOWSPEC_REDIRECT_IPV6) { | |
440 | memcpy(&eval6->val[2], ip6, sizeof(struct in6_addr)); | |
441 | eval6->val[18] = (val >> 8) & 0xff; | |
442 | eval6->val[19] = val & 0xff; | |
d62a17ae | 443 | } else { |
444 | eval->val[2] = (as >> 24) & 0xff; | |
445 | eval->val[3] = (as >> 16) & 0xff; | |
446 | eval->val[4] = (as >> 8) & 0xff; | |
447 | eval->val[5] = as & 0xff; | |
448 | eval->val[6] = (val >> 8) & 0xff; | |
449 | eval->val[7] = val & 0xff; | |
450 | } | |
451 | ||
452 | return 0; | |
c5900768 | 453 | } |
454 | ||
9a659715 PG |
455 | /* |
456 | * Encode BGP extended community from passed values. Supports types | |
457 | * defined in RFC 4360 and well-known sub-types. | |
458 | */ | |
459 | static int ecommunity_encode(uint8_t type, uint8_t sub_type, int trans, as_t as, | |
460 | struct in_addr ip, uint32_t val, | |
461 | struct ecommunity_val *eval) | |
462 | { | |
463 | return ecommunity_encode_internal(type, sub_type, trans, as, | |
464 | &ip, NULL, val, (void *)eval); | |
465 | } | |
466 | ||
718e3744 | 467 | /* Get next Extended Communities token from the string. */ |
d62a17ae | 468 | static const char *ecommunity_gettoken(const char *str, |
9a659715 | 469 | void *eval_ptr, |
d62a17ae | 470 | enum ecommunity_token *token) |
718e3744 | 471 | { |
d62a17ae | 472 | int ret; |
473 | int dot = 0; | |
474 | int digit = 0; | |
475 | int separator = 0; | |
476 | const char *p = str; | |
477 | char *endptr; | |
478 | struct in_addr ip; | |
9a659715 | 479 | struct in6_addr ip6; |
d62a17ae | 480 | as_t as = 0; |
d7c0a89a QY |
481 | uint32_t val = 0; |
482 | uint8_t ecomm_type; | |
d62a17ae | 483 | char buf[INET_ADDRSTRLEN + 1]; |
9a659715 | 484 | struct ecommunity_val *eval = (struct ecommunity_val *)eval_ptr; |
d62a17ae | 485 | /* Skip white space. */ |
fefa5e0f | 486 | while (isspace((unsigned char)*p)) { |
d62a17ae | 487 | p++; |
488 | str++; | |
718e3744 | 489 | } |
d62a17ae | 490 | |
491 | /* Check the end of the line. */ | |
492 | if (*p == '\0') | |
493 | return NULL; | |
494 | ||
495 | /* "rt" and "soo" keyword parse. */ | |
fefa5e0f | 496 | if (!isdigit((unsigned char)*p)) { |
d62a17ae | 497 | /* "rt" match check. */ |
fefa5e0f | 498 | if (tolower((unsigned char)*p) == 'r') { |
d62a17ae | 499 | p++; |
fefa5e0f | 500 | if (tolower((unsigned char)*p) == 't') { |
d62a17ae | 501 | p++; |
9a659715 PG |
502 | if (*p != '\0' && tolower((int)*p) == '6') |
503 | *token = ecommunity_token_rt6; | |
504 | else | |
505 | *token = ecommunity_token_rt; | |
d62a17ae | 506 | return p; |
507 | } | |
fefa5e0f | 508 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 509 | *token = ecommunity_token_rt; |
510 | return p; | |
511 | } | |
512 | goto error; | |
718e3744 | 513 | } |
d62a17ae | 514 | /* "soo" match check. */ |
fefa5e0f | 515 | else if (tolower((unsigned char)*p) == 's') { |
d62a17ae | 516 | p++; |
fefa5e0f | 517 | if (tolower((unsigned char)*p) == 'o') { |
d62a17ae | 518 | p++; |
fefa5e0f | 519 | if (tolower((unsigned char)*p) == 'o') { |
d62a17ae | 520 | p++; |
521 | *token = ecommunity_token_soo; | |
522 | return p; | |
523 | } | |
fefa5e0f | 524 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 525 | *token = ecommunity_token_soo; |
526 | return p; | |
527 | } | |
528 | goto error; | |
529 | } | |
fefa5e0f | 530 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 531 | *token = ecommunity_token_soo; |
532 | return p; | |
533 | } | |
534 | goto error; | |
718e3744 | 535 | } |
d62a17ae | 536 | goto error; |
718e3744 | 537 | } |
d62a17ae | 538 | |
539 | /* What a mess, there are several possibilities: | |
540 | * | |
541 | * a) A.B.C.D:MN | |
542 | * b) EF:OPQR | |
543 | * c) GHJK:MN | |
9a659715 | 544 | * d) <IPV6>:MN (only with rt6) |
d62a17ae | 545 | * |
546 | * A.B.C.D: Four Byte IP | |
547 | * EF: Two byte ASN | |
548 | * GHJK: Four-byte ASN | |
549 | * MN: Two byte value | |
550 | * OPQR: Four byte value | |
551 | * | |
552 | */ | |
9a659715 PG |
553 | /* IPv6 case : look for last ':' */ |
554 | if (*token == ecommunity_token_rt6 || | |
555 | *token == ecommunity_token_val6) { | |
556 | char *limit; | |
557 | ||
558 | limit = endptr = strrchr(p, ':'); | |
559 | if (!endptr) | |
560 | goto error; | |
8f242187 | 561 | |
9a659715 PG |
562 | endptr++; |
563 | as = strtoul(endptr, &endptr, 10); | |
564 | if (*endptr != '\0' || as == BGP_AS4_MAX) | |
565 | goto error; | |
8f242187 | 566 | |
9a659715 PG |
567 | memcpy(buf, p, (limit - p)); |
568 | buf[limit - p] = '\0'; | |
569 | ret = inet_pton(AF_INET6, buf, &ip6); | |
570 | if (ret == 0) | |
571 | goto error; | |
8f242187 | 572 | |
9a659715 PG |
573 | ecomm_type = ECOMMUNITY_ENCODE_TRANS_EXP; |
574 | if (ecommunity_encode_internal(ecomm_type, | |
8f242187 PG |
575 | ECOMMUNITY_FLOWSPEC_REDIRECT_IPV6, |
576 | 1, 0, NULL, &ip6, as, eval_ptr)) | |
9a659715 | 577 | goto error; |
8f242187 | 578 | |
9a659715 PG |
579 | *token = ecommunity_token_val6; |
580 | while (isdigit((int)*p) || *p == ':' || *p == '.') { | |
581 | p++; | |
582 | } | |
583 | return p; | |
584 | } | |
fefa5e0f | 585 | while (isdigit((unsigned char)*p) || *p == ':' || *p == '.') { |
d62a17ae | 586 | if (*p == ':') { |
587 | if (separator) | |
588 | goto error; | |
589 | ||
590 | separator = 1; | |
591 | digit = 0; | |
592 | ||
593 | if ((p - str) > INET_ADDRSTRLEN) | |
594 | goto error; | |
595 | memset(buf, 0, INET_ADDRSTRLEN + 1); | |
596 | memcpy(buf, str, p - str); | |
597 | ||
598 | if (dot) { | |
599 | /* Parsing A.B.C.D in: | |
600 | * A.B.C.D:MN | |
601 | */ | |
602 | ret = inet_aton(buf, &ip); | |
603 | if (ret == 0) | |
604 | goto error; | |
605 | } else { | |
606 | /* ASN */ | |
607 | as = strtoul(buf, &endptr, 10); | |
608 | if (*endptr != '\0' || as == BGP_AS4_MAX) | |
609 | goto error; | |
610 | } | |
611 | } else if (*p == '.') { | |
612 | if (separator) | |
613 | goto error; | |
614 | dot++; | |
615 | if (dot > 4) | |
616 | goto error; | |
617 | } else { | |
618 | digit = 1; | |
619 | ||
620 | /* We're past the IP/ASN part */ | |
621 | if (separator) { | |
622 | val *= 10; | |
623 | val += (*p - '0'); | |
624 | } | |
625 | } | |
626 | p++; | |
718e3744 | 627 | } |
d62a17ae | 628 | |
629 | /* Low digit part must be there. */ | |
630 | if (!digit || !separator) | |
631 | goto error; | |
632 | ||
633 | /* Encode result into extended community. */ | |
634 | if (dot) | |
635 | ecomm_type = ECOMMUNITY_ENCODE_IP; | |
636 | else if (as > BGP_AS_MAX) | |
637 | ecomm_type = ECOMMUNITY_ENCODE_AS4; | |
638 | else | |
639 | ecomm_type = ECOMMUNITY_ENCODE_AS; | |
640 | if (ecommunity_encode(ecomm_type, 0, 1, as, ip, val, eval)) | |
641 | goto error; | |
642 | *token = ecommunity_token_val; | |
643 | return p; | |
644 | ||
645 | error: | |
646 | *token = ecommunity_token_unknown; | |
647 | return p; | |
718e3744 | 648 | } |
649 | ||
9a659715 PG |
650 | static struct ecommunity *ecommunity_str2com_internal(const char *str, int type, |
651 | int keyword_included, | |
652 | bool is_ipv6_extcomm) | |
718e3744 | 653 | { |
d62a17ae | 654 | struct ecommunity *ecom = NULL; |
655 | enum ecommunity_token token = ecommunity_token_unknown; | |
9a659715 | 656 | struct ecommunity_val_ipv6 eval; |
d62a17ae | 657 | int keyword = 0; |
658 | ||
9a659715 PG |
659 | if (is_ipv6_extcomm) |
660 | token = ecommunity_token_rt6; | |
661 | while ((str = ecommunity_gettoken(str, (void *)&eval, &token))) { | |
d62a17ae | 662 | switch (token) { |
663 | case ecommunity_token_rt: | |
664 | case ecommunity_token_soo: | |
665 | if (!keyword_included || keyword) { | |
666 | if (ecom) | |
667 | ecommunity_free(&ecom); | |
668 | return NULL; | |
669 | } | |
670 | keyword = 1; | |
671 | ||
9a659715 PG |
672 | if (token == ecommunity_token_rt || |
673 | token == ecommunity_token_rt6) { | |
d62a17ae | 674 | type = ECOMMUNITY_ROUTE_TARGET; |
675 | } | |
676 | if (token == ecommunity_token_soo) { | |
677 | type = ECOMMUNITY_SITE_ORIGIN; | |
678 | } | |
679 | break; | |
680 | case ecommunity_token_val: | |
681 | if (keyword_included) { | |
682 | if (!keyword) { | |
8f242187 | 683 | ecommunity_free(&ecom); |
d62a17ae | 684 | return NULL; |
685 | } | |
686 | keyword = 0; | |
687 | } | |
688 | if (ecom == NULL) | |
689 | ecom = ecommunity_new(); | |
690 | eval.val[1] = type; | |
4371bf91 PG |
691 | ecommunity_add_val_internal(ecom, (void *)&eval, |
692 | false, false, | |
9a659715 PG |
693 | ecom->unit_size); |
694 | break; | |
695 | case ecommunity_token_val6: | |
696 | if (keyword_included) { | |
697 | if (!keyword) { | |
8f242187 | 698 | ecommunity_free(&ecom); |
9a659715 PG |
699 | return NULL; |
700 | } | |
701 | keyword = 0; | |
702 | } | |
703 | if (ecom == NULL) | |
704 | ecom = ecommunity_new(); | |
705 | ecom->unit_size = IPV6_ECOMMUNITY_SIZE; | |
706 | eval.val[1] = type; | |
707 | ecommunity_add_val_internal(ecom, (void *)&eval, false, false, | |
708 | ecom->unit_size); | |
d62a17ae | 709 | break; |
710 | case ecommunity_token_unknown: | |
711 | default: | |
712 | if (ecom) | |
713 | ecommunity_free(&ecom); | |
714 | return NULL; | |
718e3744 | 715 | } |
718e3744 | 716 | } |
d62a17ae | 717 | return ecom; |
718e3744 | 718 | } |
719 | ||
9a659715 | 720 | /* Convert string to extended community attribute. |
4371bf91 PG |
721 | * |
722 | * When type is already known, please specify both str and type. str | |
723 | * should not include keyword such as "rt" and "soo". Type is | |
724 | * ECOMMUNITY_ROUTE_TARGET or ECOMMUNITY_SITE_ORIGIN. | |
725 | * keyword_included should be zero. | |
726 | * | |
727 | * For example route-map's "set extcommunity" command case: | |
728 | * | |
729 | * "rt 100:1 100:2 100:3" -> str = "100:1 100:2 100:3" | |
730 | * type = ECOMMUNITY_ROUTE_TARGET | |
731 | * keyword_included = 0 | |
732 | * | |
733 | * "soo 100:1" -> str = "100:1" | |
734 | * type = ECOMMUNITY_SITE_ORIGIN | |
735 | * keyword_included = 0 | |
736 | * | |
737 | * When string includes keyword for each extended community value. | |
738 | * Please specify keyword_included as non-zero value. | |
739 | * | |
740 | * For example standard extcommunity-list case: | |
741 | * | |
742 | * "rt 100:1 rt 100:2 soo 100:1" -> str = "rt 100:1 rt 100:2 soo 100:1" | |
743 | * type = 0 | |
744 | * keyword_include = 1 | |
745 | */ | |
9a659715 PG |
746 | struct ecommunity *ecommunity_str2com(const char *str, int type, |
747 | int keyword_included) | |
748 | { | |
749 | return ecommunity_str2com_internal(str, type, | |
750 | keyword_included, false); | |
751 | } | |
752 | ||
753 | struct ecommunity *ecommunity_str2com_ipv6(const char *str, int type, | |
754 | int keyword_included) | |
755 | { | |
756 | return ecommunity_str2com_internal(str, type, | |
757 | keyword_included, true); | |
758 | } | |
759 | ||
760 | static int ecommunity_rt_soo_str_internal(char *buf, size_t bufsz, | |
761 | const uint8_t *pnt, int type, | |
762 | int sub_type, int format, | |
763 | unsigned short ecom_size) | |
c5900768 | 764 | { |
d62a17ae | 765 | int len = 0; |
766 | const char *prefix; | |
9a659715 | 767 | char buf_local[INET6_ADDRSTRLEN]; |
d62a17ae | 768 | |
769 | /* For parse Extended Community attribute tupple. */ | |
5a0ccebf QY |
770 | struct ecommunity_as eas; |
771 | struct ecommunity_ip eip; | |
9a659715 | 772 | struct ecommunity_ip6 eip6; |
d62a17ae | 773 | |
774 | /* Determine prefix for string, if any. */ | |
775 | switch (format) { | |
776 | case ECOMMUNITY_FORMAT_COMMUNITY_LIST: | |
777 | prefix = (sub_type == ECOMMUNITY_ROUTE_TARGET ? "rt " : "soo "); | |
778 | break; | |
779 | case ECOMMUNITY_FORMAT_DISPLAY: | |
780 | prefix = (sub_type == ECOMMUNITY_ROUTE_TARGET ? "RT:" : "SoO:"); | |
781 | break; | |
782 | case ECOMMUNITY_FORMAT_ROUTE_MAP: | |
783 | prefix = ""; | |
784 | break; | |
785 | default: | |
786 | prefix = ""; | |
787 | break; | |
788 | } | |
789 | ||
790 | /* Put string into buffer. */ | |
791 | if (type == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 792 | pnt = ptr_get_be32(pnt, &eas.as); |
d62a17ae | 793 | eas.val = (*pnt++ << 8); |
794 | eas.val |= (*pnt++); | |
795 | ||
91085f97 | 796 | len = snprintf(buf, bufsz, "%s%u:%u", prefix, eas.as, eas.val); |
d62a17ae | 797 | } else if (type == ECOMMUNITY_ENCODE_AS) { |
9a659715 PG |
798 | if (ecom_size == ECOMMUNITY_SIZE) { |
799 | eas.as = (*pnt++ << 8); | |
800 | eas.as |= (*pnt++); | |
801 | pnt = ptr_get_be32(pnt, &eas.val); | |
d62a17ae | 802 | |
4371bf91 PG |
803 | len = snprintf(buf, bufsz, "%s%u:%u", prefix, eas.as, |
804 | eas.val); | |
9a659715 PG |
805 | } else { |
806 | /* this is an IPv6 ext community | |
c6423c31 | 807 | * first 16 bytes stands for IPv6 addres |
9a659715 PG |
808 | */ |
809 | memcpy(&eip6.ip, pnt, 16); | |
810 | pnt += 16; | |
811 | eip6.val = (*pnt++ << 8); | |
812 | eip6.val |= (*pnt++); | |
813 | ||
4371bf91 PG |
814 | inet_ntop(AF_INET6, &eip6.ip, buf_local, |
815 | sizeof(buf_local)); | |
9a659715 PG |
816 | len = snprintf(buf, bufsz, "%s%s:%u", prefix, |
817 | buf_local, eip6.val); | |
818 | } | |
d62a17ae | 819 | } else if (type == ECOMMUNITY_ENCODE_IP) { |
820 | memcpy(&eip.ip, pnt, 4); | |
821 | pnt += 4; | |
822 | eip.val = (*pnt++ << 8); | |
823 | eip.val |= (*pnt++); | |
824 | ||
23d0a753 DA |
825 | len = snprintfrr(buf, bufsz, "%s%pI4:%u", prefix, &eip.ip, |
826 | eip.val); | |
d62a17ae | 827 | } |
91085f97 QY |
828 | |
829 | /* consume value */ | |
830 | (void)pnt; | |
d62a17ae | 831 | |
832 | return len; | |
c5900768 | 833 | } |
834 | ||
9a659715 PG |
835 | static int ecommunity_rt_soo_str(char *buf, size_t bufsz, const uint8_t *pnt, |
836 | int type, int sub_type, int format) | |
837 | { | |
838 | return ecommunity_rt_soo_str_internal(buf, bufsz, pnt, type, | |
839 | sub_type, format, | |
840 | ECOMMUNITY_SIZE); | |
841 | } | |
842 | ||
8bcaad3d DA |
843 | /* Helper function to convert IEEE-754 Floating Point to uint32 */ |
844 | static uint32_t ieee_float_uint32_to_uint32(uint32_t u) | |
845 | { | |
846 | union { | |
847 | float r; | |
848 | uint32_t d; | |
849 | } f = {.d = u}; | |
850 | ||
851 | return (uint32_t)f.r; | |
852 | } | |
853 | ||
27aa23a4 DA |
854 | static int ecommunity_lb_str(char *buf, size_t bufsz, const uint8_t *pnt, |
855 | bool disable_ieee_floating) | |
7e3ebfd1 | 856 | { |
857 | int len = 0; | |
858 | as_t as; | |
8bcaad3d | 859 | uint32_t bw_tmp, bw; |
7e3ebfd1 | 860 | char bps_buf[20] = {0}; |
861 | ||
862 | #define ONE_GBPS_BYTES (1000 * 1000 * 1000 / 8) | |
863 | #define ONE_MBPS_BYTES (1000 * 1000 / 8) | |
864 | #define ONE_KBPS_BYTES (1000 / 8) | |
865 | ||
866 | as = (*pnt++ << 8); | |
867 | as |= (*pnt++); | |
8bcaad3d DA |
868 | (void)ptr_get_be32(pnt, &bw_tmp); |
869 | ||
27aa23a4 DA |
870 | bw = disable_ieee_floating ? bw_tmp |
871 | : ieee_float_uint32_to_uint32(bw_tmp); | |
8bcaad3d | 872 | |
7e3ebfd1 | 873 | if (bw >= ONE_GBPS_BYTES) |
772270f3 QY |
874 | snprintf(bps_buf, sizeof(bps_buf), "%.3f Gbps", |
875 | (float)(bw / ONE_GBPS_BYTES)); | |
7e3ebfd1 | 876 | else if (bw >= ONE_MBPS_BYTES) |
772270f3 QY |
877 | snprintf(bps_buf, sizeof(bps_buf), "%.3f Mbps", |
878 | (float)(bw / ONE_MBPS_BYTES)); | |
7e3ebfd1 | 879 | else if (bw >= ONE_KBPS_BYTES) |
772270f3 QY |
880 | snprintf(bps_buf, sizeof(bps_buf), "%.3f Kbps", |
881 | (float)(bw / ONE_KBPS_BYTES)); | |
7e3ebfd1 | 882 | else |
772270f3 | 883 | snprintf(bps_buf, sizeof(bps_buf), "%u bps", bw * 8); |
7e3ebfd1 | 884 | |
885 | len = snprintf(buf, bufsz, "LB:%u:%u (%s)", as, bw, bps_buf); | |
886 | return len; | |
887 | } | |
888 | ||
d62a17ae | 889 | /* Convert extended community attribute to string. |
718e3744 | 890 | |
891 | Due to historical reason of industry standard implementation, there | |
892 | are three types of format. | |
893 | ||
894 | route-map set extcommunity format | |
3efd0893 | 895 | "rt 100:1 100:2soo 100:3" |
718e3744 | 896 | |
897 | extcommunity-list | |
3efd0893 | 898 | "rt 100:1 rt 100:2 soo 100:3show [ip] bgp" and extcommunity-list regular expression matching |
d62a17ae | 899 | "RT:100:1 RT:100:2 SoO:100:3" |
718e3744 | 900 | |
901 | For each formath please use below definition for format: | |
902 | ||
903 | ECOMMUNITY_FORMAT_ROUTE_MAP | |
904 | ECOMMUNITY_FORMAT_COMMUNITY_LIST | |
905 | ECOMMUNITY_FORMAT_DISPLAY | |
e82202b7 | 906 | |
d62a17ae | 907 | Filter is added to display only ECOMMUNITY_ROUTE_TARGET in some cases. |
e82202b7 | 908 | 0 value displays all |
718e3744 | 909 | */ |
d62a17ae | 910 | char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter) |
718e3744 | 911 | { |
f6e07e1b | 912 | uint32_t i; |
d7c0a89a | 913 | uint8_t *pnt; |
1ef3c51f PG |
914 | uint8_t type = 0; |
915 | uint8_t sub_type = 0; | |
d62a17ae | 916 | int str_size; |
d62a17ae | 917 | char *str_buf; |
d62a17ae | 918 | |
6a37bfb7 | 919 | if (!ecom || ecom->size == 0) |
91085f97 QY |
920 | return XCALLOC(MTYPE_ECOMMUNITY_STR, 1); |
921 | ||
922 | /* ecom strlen + space + null term */ | |
923 | str_size = (ecom->size * (ECOMMUNITY_STRLEN + 1)) + 1; | |
924 | str_buf = XCALLOC(MTYPE_ECOMMUNITY_STR, str_size); | |
d62a17ae | 925 | |
91085f97 | 926 | char encbuf[128]; |
d62a17ae | 927 | |
928 | for (i = 0; i < ecom->size; i++) { | |
929 | int unk_ecom = 0; | |
91085f97 | 930 | memset(encbuf, 0x00, sizeof(encbuf)); |
d62a17ae | 931 | |
932 | /* Space between each value. */ | |
91085f97 QY |
933 | if (i > 0) |
934 | strlcat(str_buf, " ", str_size); | |
d62a17ae | 935 | |
91085f97 | 936 | /* Retrieve value field */ |
f32f3ae5 | 937 | pnt = ecom->val + (i * ecom->unit_size); |
d62a17ae | 938 | |
91085f97 | 939 | /* High-order octet is the type */ |
d62a17ae | 940 | type = *pnt++; |
941 | ||
942 | if (type == ECOMMUNITY_ENCODE_AS || type == ECOMMUNITY_ENCODE_IP | |
943 | || type == ECOMMUNITY_ENCODE_AS4) { | |
944 | /* Low-order octet of type. */ | |
945 | sub_type = *pnt++; | |
946 | if (sub_type != ECOMMUNITY_ROUTE_TARGET | |
2551b26e PG |
947 | && sub_type != ECOMMUNITY_SITE_ORIGIN) { |
948 | if (sub_type == | |
949 | ECOMMUNITY_FLOWSPEC_REDIRECT_IPV4 && | |
950 | type == ECOMMUNITY_ENCODE_IP) { | |
951 | struct in_addr *ipv4 = | |
952 | (struct in_addr *)pnt; | |
953 | char ipv4str[INET_ADDRSTRLEN]; | |
954 | ||
955 | inet_ntop(AF_INET, ipv4, | |
956 | ipv4str, | |
957 | INET_ADDRSTRLEN); | |
91085f97 QY |
958 | snprintf(encbuf, sizeof(encbuf), |
959 | "NH:%s:%d", ipv4str, pnt[5]); | |
7e3ebfd1 | 960 | } else if (sub_type == |
961 | ECOMMUNITY_LINK_BANDWIDTH && | |
962 | type == ECOMMUNITY_ENCODE_AS) { | |
27aa23a4 DA |
963 | ecommunity_lb_str( |
964 | encbuf, sizeof(encbuf), pnt, | |
965 | ecom->disable_ieee_floating); | |
2551b26e PG |
966 | } else |
967 | unk_ecom = 1; | |
91085f97 QY |
968 | } else { |
969 | ecommunity_rt_soo_str(encbuf, sizeof(encbuf), | |
970 | pnt, type, sub_type, | |
971 | format); | |
972 | } | |
d62a17ae | 973 | } else if (type == ECOMMUNITY_ENCODE_OPAQUE) { |
974 | if (filter == ECOMMUNITY_ROUTE_TARGET) | |
975 | continue; | |
976 | if (*pnt == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP) { | |
977 | uint16_t tunneltype; | |
978 | memcpy(&tunneltype, pnt + 5, 2); | |
979 | tunneltype = ntohs(tunneltype); | |
91085f97 QY |
980 | |
981 | snprintf(encbuf, sizeof(encbuf), "ET:%d", | |
982 | tunneltype); | |
996c9314 | 983 | } else if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_DEF_GW) { |
91085f97 QY |
984 | strlcpy(encbuf, "Default Gateway", |
985 | sizeof(encbuf)); | |
986 | } else { | |
d62a17ae | 987 | unk_ecom = 1; |
91085f97 | 988 | } |
d62a17ae | 989 | } else if (type == ECOMMUNITY_ENCODE_EVPN) { |
990 | if (filter == ECOMMUNITY_ROUTE_TARGET) | |
991 | continue; | |
bc59a672 MK |
992 | if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC) { |
993 | struct ethaddr rmac; | |
d62a17ae | 994 | pnt++; |
bc59a672 | 995 | memcpy(&rmac, pnt, ETH_ALEN); |
91085f97 QY |
996 | |
997 | snprintf(encbuf, sizeof(encbuf), | |
998 | "Rmac:%02x:%02x:%02x:%02x:%02x:%02x", | |
999 | (uint8_t)rmac.octet[0], | |
1000 | (uint8_t)rmac.octet[1], | |
1001 | (uint8_t)rmac.octet[2], | |
1002 | (uint8_t)rmac.octet[3], | |
1003 | (uint8_t)rmac.octet[4], | |
1004 | (uint8_t)rmac.octet[5]); | |
d62a17ae | 1005 | } else if (*pnt |
1006 | == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY) { | |
d7c0a89a QY |
1007 | uint32_t seqnum; |
1008 | uint8_t flags = *++pnt; | |
d62a17ae | 1009 | |
1010 | memcpy(&seqnum, pnt + 2, 4); | |
1011 | seqnum = ntohl(seqnum); | |
91085f97 QY |
1012 | |
1013 | snprintf(encbuf, sizeof(encbuf), "MM:%u", | |
1014 | seqnum); | |
1015 | ||
1016 | if (CHECK_FLAG( | |
1017 | flags, | |
1018 | ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY)) | |
1019 | strlcat(encbuf, ", sticky MAC", | |
1020 | sizeof(encbuf)); | |
5cc359b2 CS |
1021 | } else if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_ND) { |
1022 | uint8_t flags = *++pnt; | |
1023 | ||
91085f97 QY |
1024 | if (CHECK_FLAG( |
1025 | flags, | |
1026 | ECOMMUNITY_EVPN_SUBTYPE_ND_ROUTER_FLAG)) | |
1027 | strlcpy(encbuf, "ND:Router Flag", | |
1028 | sizeof(encbuf)); | |
7904e9fd AK |
1029 | if (CHECK_FLAG( |
1030 | flags, | |
1031 | ECOMMUNITY_EVPN_SUBTYPE_PROXY_FLAG)) | |
1032 | strlcpy(encbuf, "ND:Proxy", | |
1033 | sizeof(encbuf)); | |
4248407b AK |
1034 | } else if (*pnt |
1035 | == ECOMMUNITY_EVPN_SUBTYPE_ES_IMPORT_RT) { | |
1036 | struct ethaddr mac; | |
1037 | ||
1038 | pnt++; | |
1039 | memcpy(&mac, pnt, ETH_ALEN); | |
1040 | snprintf(encbuf, | |
1041 | sizeof(encbuf), | |
1042 | "ES-Import-Rt:%02x:%02x:%02x:%02x:%02x:%02x", | |
1043 | (uint8_t)mac.octet[0], | |
1044 | (uint8_t)mac.octet[1], | |
1045 | (uint8_t)mac.octet[2], | |
1046 | (uint8_t)mac.octet[3], | |
1047 | (uint8_t)mac.octet[4], | |
1048 | (uint8_t)mac.octet[5]); | |
1049 | } else if (*pnt | |
1050 | == ECOMMUNITY_EVPN_SUBTYPE_ESI_LABEL) { | |
1051 | uint8_t flags = *++pnt; | |
1052 | ||
1053 | snprintf(encbuf, | |
1054 | sizeof(encbuf), "ESI-label-Rt:%s", | |
1055 | (flags & | |
1056 | ECOMMUNITY_EVPN_SUBTYPE_ESI_SA_FLAG) ? | |
1057 | "SA":"AA"); | |
74e2bd89 AK |
1058 | } else if (*pnt |
1059 | == ECOMMUNITY_EVPN_SUBTYPE_DF_ELECTION) { | |
1060 | uint8_t alg; | |
1061 | uint16_t pref; | |
1062 | uint16_t bmap; | |
1063 | ||
1064 | alg = *(pnt + 1); | |
1065 | memcpy(&bmap, pnt + 2, 2); | |
1066 | bmap = ntohs(bmap); | |
1067 | memcpy(&pref, pnt + 5, 2); | |
1068 | pref = ntohs(pref); | |
1069 | ||
1070 | if (bmap) | |
1071 | snprintf( | |
1072 | encbuf, sizeof(encbuf), | |
1073 | "DF: (alg: %u, bmap: 0x%x pref: %u)", | |
1074 | alg, bmap, pref); | |
1075 | else | |
1076 | snprintf(encbuf, sizeof(encbuf), | |
1077 | "DF: (alg: %u, pref: %u)", alg, | |
1078 | pref); | |
d62a17ae | 1079 | } else |
1080 | unk_ecom = 1; | |
b72220fc PG |
1081 | } else if (type == ECOMMUNITY_ENCODE_REDIRECT_IP_NH) { |
1082 | sub_type = *pnt++; | |
1083 | if (sub_type == ECOMMUNITY_REDIRECT_IP_NH) { | |
91085f97 QY |
1084 | snprintf(encbuf, sizeof(encbuf), |
1085 | "FS:redirect IP 0x%x", *(pnt + 5)); | |
b72220fc PG |
1086 | } else |
1087 | unk_ecom = 1; | |
1ef3c51f PG |
1088 | } else if (type == ECOMMUNITY_ENCODE_TRANS_EXP || |
1089 | type == ECOMMUNITY_EXTENDED_COMMUNITY_PART_2 || | |
1090 | type == ECOMMUNITY_EXTENDED_COMMUNITY_PART_3) { | |
a8d72b61 | 1091 | sub_type = *pnt++; |
9a659715 PG |
1092 | |
1093 | if (sub_type == ECOMMUNITY_ROUTE_TARGET) { | |
8f242187 | 1094 | char buf[ECOMMUNITY_STRLEN]; |
9a659715 PG |
1095 | |
1096 | memset(buf, 0, sizeof(buf)); | |
1097 | ecommunity_rt_soo_str_internal(buf, sizeof(buf), | |
1098 | (const uint8_t *)pnt, | |
1099 | type & | |
1100 | ~ECOMMUNITY_ENCODE_TRANS_EXP, | |
1101 | ECOMMUNITY_ROUTE_TARGET, | |
1102 | format, | |
1103 | ecom->unit_size); | |
1104 | snprintf(encbuf, sizeof(encbuf), "%s", buf); | |
4371bf91 PG |
1105 | } else if (sub_type == |
1106 | ECOMMUNITY_FLOWSPEC_REDIRECT_IPV6) { | |
9a659715 PG |
1107 | char buf[64]; |
1108 | ||
1109 | memset(buf, 0, sizeof(buf)); | |
1110 | ecommunity_rt_soo_str_internal(buf, sizeof(buf), | |
1111 | (const uint8_t *)pnt, | |
1112 | type & | |
1113 | ~ECOMMUNITY_ENCODE_TRANS_EXP, | |
1114 | ECOMMUNITY_ROUTE_TARGET, | |
1115 | ECOMMUNITY_FORMAT_DISPLAY, | |
1116 | ecom->unit_size); | |
4371bf91 PG |
1117 | snprintf(encbuf, sizeof(encbuf), |
1118 | "FS:redirect VRF %s", buf); | |
9a659715 PG |
1119 | } else if (sub_type == ECOMMUNITY_REDIRECT_VRF) { |
1120 | char buf[16]; | |
1121 | ||
1122 | memset(buf, 0, sizeof(buf)); | |
4371bf91 PG |
1123 | ecommunity_rt_soo_str(buf, sizeof(buf), |
1124 | (const uint8_t *)pnt, | |
1125 | type & | |
1126 | ~ECOMMUNITY_ENCODE_TRANS_EXP, | |
1127 | ECOMMUNITY_ROUTE_TARGET, | |
1128 | ECOMMUNITY_FORMAT_DISPLAY); | |
1129 | snprintf(encbuf, sizeof(encbuf), | |
1130 | "FS:redirect VRF %s", buf); | |
91085f97 QY |
1131 | snprintf(encbuf, sizeof(encbuf), |
1132 | "FS:redirect VRF %s", buf); | |
1ef3c51f PG |
1133 | } else if (type != ECOMMUNITY_ENCODE_TRANS_EXP) |
1134 | unk_ecom = 1; | |
1135 | else if (sub_type == ECOMMUNITY_TRAFFIC_ACTION) { | |
a8d72b61 | 1136 | char action[64]; |
a8d72b61 PG |
1137 | |
1138 | if (*(pnt+3) == | |
1139 | 1 << FLOWSPEC_TRAFFIC_ACTION_TERMINAL) | |
91085f97 QY |
1140 | strlcpy(action, "terminate (apply)", |
1141 | sizeof(action)); | |
a8d72b61 | 1142 | else |
91085f97 QY |
1143 | strlcpy(action, "eval stops", |
1144 | sizeof(action)); | |
1145 | ||
a8d72b61 PG |
1146 | if (*(pnt+3) == |
1147 | 1 << FLOWSPEC_TRAFFIC_ACTION_SAMPLE) | |
91085f97 QY |
1148 | strlcat(action, ", sample", |
1149 | sizeof(action)); | |
1150 | ||
1151 | ||
1152 | snprintf(encbuf, sizeof(encbuf), "FS:action %s", | |
1153 | action); | |
a8d72b61 PG |
1154 | } else if (sub_type == ECOMMUNITY_TRAFFIC_RATE) { |
1155 | union traffic_rate data; | |
1156 | ||
1157 | data.rate_byte[3] = *(pnt+2); | |
1158 | data.rate_byte[2] = *(pnt+3); | |
1159 | data.rate_byte[1] = *(pnt+4); | |
1160 | data.rate_byte[0] = *(pnt+5); | |
91085f97 QY |
1161 | snprintf(encbuf, sizeof(encbuf), "FS:rate %f", |
1162 | data.rate_float); | |
a8d72b61 | 1163 | } else if (sub_type == ECOMMUNITY_TRAFFIC_MARKING) { |
91085f97 QY |
1164 | snprintf(encbuf, sizeof(encbuf), |
1165 | "FS:marking %u", *(pnt + 5)); | |
a8d72b61 PG |
1166 | } else |
1167 | unk_ecom = 1; | |
7e3ebfd1 | 1168 | } else if (type == ECOMMUNITY_ENCODE_AS_NON_TRANS) { |
1169 | sub_type = *pnt++; | |
1170 | if (sub_type == ECOMMUNITY_LINK_BANDWIDTH) | |
27aa23a4 DA |
1171 | ecommunity_lb_str(encbuf, sizeof(encbuf), pnt, |
1172 | ecom->disable_ieee_floating); | |
7e3ebfd1 | 1173 | else |
1174 | unk_ecom = 1; | |
1ef3c51f PG |
1175 | } else { |
1176 | sub_type = *pnt++; | |
d62a17ae | 1177 | unk_ecom = 1; |
1ef3c51f | 1178 | } |
d62a17ae | 1179 | |
1180 | if (unk_ecom) | |
91085f97 QY |
1181 | snprintf(encbuf, sizeof(encbuf), "UNK:%d, %d", type, |
1182 | sub_type); | |
d62a17ae | 1183 | |
91085f97 QY |
1184 | int r = strlcat(str_buf, encbuf, str_size); |
1185 | assert(r < str_size); | |
94431dbc C |
1186 | } |
1187 | ||
d62a17ae | 1188 | return str_buf; |
718e3744 | 1189 | } |
4372df71 | 1190 | |
3dc339cd DA |
1191 | bool ecommunity_match(const struct ecommunity *ecom1, |
1192 | const struct ecommunity *ecom2) | |
4372df71 | 1193 | { |
f6e07e1b DS |
1194 | uint32_t i = 0; |
1195 | uint32_t j = 0; | |
d62a17ae | 1196 | |
1197 | if (ecom1 == NULL && ecom2 == NULL) | |
3dc339cd | 1198 | return true; |
d62a17ae | 1199 | |
1200 | if (ecom1 == NULL || ecom2 == NULL) | |
3dc339cd | 1201 | return false; |
d62a17ae | 1202 | |
1203 | if (ecom1->size < ecom2->size) | |
3dc339cd | 1204 | return false; |
d62a17ae | 1205 | |
1206 | /* Every community on com2 needs to be on com1 for this to match */ | |
1207 | while (i < ecom1->size && j < ecom2->size) { | |
9a659715 PG |
1208 | if (memcmp(ecom1->val + i * ecom1->unit_size, |
1209 | ecom2->val + j * ecom2->unit_size, | |
1210 | ecom2->unit_size) | |
d62a17ae | 1211 | == 0) |
1212 | j++; | |
1213 | i++; | |
1214 | } | |
1215 | ||
1216 | if (j == ecom2->size) | |
3dc339cd | 1217 | return true; |
d62a17ae | 1218 | else |
3dc339cd | 1219 | return false; |
4372df71 | 1220 | } |
1e27ef50 PG |
1221 | |
1222 | /* return first occurence of type */ | |
d62a17ae | 1223 | extern struct ecommunity_val *ecommunity_lookup(const struct ecommunity *ecom, |
1224 | uint8_t type, uint8_t subtype) | |
1e27ef50 | 1225 | { |
d7c0a89a | 1226 | uint8_t *p; |
f6e07e1b | 1227 | uint32_t c; |
d62a17ae | 1228 | |
1229 | /* If the value already exists in the structure return 0. */ | |
1230 | c = 0; | |
9a659715 | 1231 | for (p = ecom->val; c < ecom->size; p += ecom->unit_size, c++) { |
d62a17ae | 1232 | if (p == NULL) { |
1233 | continue; | |
1234 | } | |
1235 | if (p[0] == type && p[1] == subtype) | |
1236 | return (struct ecommunity_val *)p; | |
1237 | } | |
1238 | return NULL; | |
1e27ef50 PG |
1239 | } |
1240 | ||
1241 | /* remove ext. community matching type and subtype | |
1242 | * return 1 on success ( removed ), 0 otherwise (not present) | |
1243 | */ | |
1207a5bc | 1244 | bool ecommunity_strip(struct ecommunity *ecom, uint8_t type, |
1245 | uint8_t subtype) | |
1e27ef50 | 1246 | { |
003bc275 | 1247 | uint8_t *p, *q, *new; |
f6e07e1b | 1248 | uint32_t c, found = 0; |
d62a17ae | 1249 | /* When this is fist value, just add it. */ |
3dc339cd DA |
1250 | if (ecom == NULL || ecom->val == NULL) |
1251 | return false; | |
d62a17ae | 1252 | |
003bc275 | 1253 | /* Check if any existing ext community matches. */ |
1254 | /* Certain extended communities like the Route Target can be present | |
1255 | * multiple times, handle that. | |
1256 | */ | |
d62a17ae | 1257 | c = 0; |
9a659715 | 1258 | for (p = ecom->val; c < ecom->size; p += ecom->unit_size, c++) { |
003bc275 | 1259 | if (p[0] == type && p[1] == subtype) |
1260 | found++; | |
d62a17ae | 1261 | } |
003bc275 | 1262 | /* If no matching ext community exists, return. */ |
d62a17ae | 1263 | if (found == 0) |
3dc339cd | 1264 | return false; |
003bc275 | 1265 | |
1266 | /* Handle the case where everything needs to be stripped. */ | |
1267 | if (found == ecom->size) { | |
1268 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
1269 | ecom->size = 0; | |
3dc339cd | 1270 | return true; |
003bc275 | 1271 | } |
1272 | ||
1273 | /* Strip matching ext community(ies). */ | |
1274 | new = XMALLOC(MTYPE_ECOMMUNITY_VAL, | |
9a659715 | 1275 | (ecom->size - found) * ecom->unit_size); |
003bc275 | 1276 | q = new; |
9a659715 | 1277 | for (c = 0, p = ecom->val; c < ecom->size; c++, p += ecom->unit_size) { |
003bc275 | 1278 | if (!(p[0] == type && p[1] == subtype)) { |
9a659715 PG |
1279 | memcpy(q, p, ecom->unit_size); |
1280 | q += ecom->unit_size; | |
003bc275 | 1281 | } |
1282 | } | |
1283 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
1284 | ecom->val = new; | |
1285 | ecom->size -= found; | |
3dc339cd | 1286 | return true; |
1e27ef50 | 1287 | } |
44338987 | 1288 | |
1289 | /* | |
1290 | * Remove specified extended community value from extended community. | |
1291 | * Returns 1 if value was present (and hence, removed), 0 otherwise. | |
1292 | */ | |
3dc339cd | 1293 | bool ecommunity_del_val(struct ecommunity *ecom, struct ecommunity_val *eval) |
44338987 | 1294 | { |
f27f864e | 1295 | uint8_t *p; |
f6e07e1b | 1296 | uint32_t c, found = 0; |
44338987 | 1297 | |
1298 | /* Make sure specified value exists. */ | |
1299 | if (ecom == NULL || ecom->val == NULL) | |
3dc339cd | 1300 | return false; |
44338987 | 1301 | c = 0; |
9a659715 PG |
1302 | for (p = ecom->val; c < ecom->size; p += ecom->unit_size, c++) { |
1303 | if (!memcmp(p, eval->val, ecom->unit_size)) { | |
44338987 | 1304 | found = 1; |
1305 | break; | |
1306 | } | |
1307 | } | |
1308 | if (found == 0) | |
3dc339cd | 1309 | return false; |
44338987 | 1310 | |
1311 | /* Delete the selected value */ | |
1312 | ecom->size--; | |
de7cee09 AR |
1313 | if (ecom->size) { |
1314 | p = XMALLOC(MTYPE_ECOMMUNITY_VAL, ecom->size * ecom->unit_size); | |
1315 | if (c != 0) | |
1316 | memcpy(p, ecom->val, c * ecom->unit_size); | |
1317 | if ((ecom->size - c) != 0) | |
1318 | memcpy(p + (c)*ecom->unit_size, | |
1319 | ecom->val + (c + 1) * ecom->unit_size, | |
1320 | (ecom->size - c) * ecom->unit_size); | |
1321 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
1322 | ecom->val = p; | |
1323 | } else | |
1324 | ecom->val = NULL; | |
1325 | ||
3dc339cd | 1326 | return true; |
44338987 | 1327 | } |
dacf6ec1 PG |
1328 | |
1329 | int ecommunity_fill_pbr_action(struct ecommunity_val *ecom_eval, | |
f01e580f PG |
1330 | struct bgp_pbr_entry_action *api, |
1331 | afi_t afi) | |
dacf6ec1 PG |
1332 | { |
1333 | if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_RATE) { | |
1334 | api->action = ACTION_TRAFFICRATE; | |
1335 | api->u.r.rate_info[3] = ecom_eval->val[4]; | |
1336 | api->u.r.rate_info[2] = ecom_eval->val[5]; | |
1337 | api->u.r.rate_info[1] = ecom_eval->val[6]; | |
1338 | api->u.r.rate_info[0] = ecom_eval->val[7]; | |
1339 | } else if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_ACTION) { | |
1340 | api->action = ACTION_TRAFFIC_ACTION; | |
1341 | /* else distribute code is set by default */ | |
1342 | if (ecom_eval->val[5] & (1 << FLOWSPEC_TRAFFIC_ACTION_TERMINAL)) | |
1343 | api->u.za.filter |= TRAFFIC_ACTION_TERMINATE; | |
1344 | else | |
1345 | api->u.za.filter |= TRAFFIC_ACTION_DISTRIBUTE; | |
1346 | if (ecom_eval->val[5] == 1 << FLOWSPEC_TRAFFIC_ACTION_SAMPLE) | |
1347 | api->u.za.filter |= TRAFFIC_ACTION_SAMPLE; | |
1348 | ||
1349 | } else if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_MARKING) { | |
1350 | api->action = ACTION_MARKING; | |
1351 | api->u.marking_dscp = ecom_eval->val[7]; | |
1352 | } else if (ecom_eval->val[1] == ECOMMUNITY_REDIRECT_VRF) { | |
1353 | /* must use external function */ | |
1354 | return 0; | |
f01e580f PG |
1355 | } else if (ecom_eval->val[1] == ECOMMUNITY_REDIRECT_IP_NH && |
1356 | afi == AFI_IP) { | |
dacf6ec1 PG |
1357 | /* see draft-ietf-idr-flowspec-redirect-ip-02 |
1358 | * Q1: how come a ext. community can host ipv6 address | |
1359 | * Q2 : from cisco documentation: | |
1360 | * Announces the reachability of one or more flowspec NLRI. | |
1361 | * When a BGP speaker receives an UPDATE message with the | |
1362 | * redirect-to-IP extended community, it is expected to | |
1363 | * create a traffic filtering rule for every flow-spec | |
1364 | * NLRI in the message that has this path as its best | |
1365 | * path. The filter entry matches the IP packets | |
1366 | * described in the NLRI field and redirects them or | |
1367 | * copies them towards the IPv4 or IPv6 address specified | |
1368 | * in the 'Network Address of Next- Hop' | |
1369 | * field of the associated MP_REACH_NLRI. | |
1370 | */ | |
1371 | struct ecommunity_ip *ip_ecom = (struct ecommunity_ip *) | |
1372 | ecom_eval + 2; | |
1373 | ||
1374 | api->u.zr.redirect_ip_v4 = ip_ecom->ip; | |
1375 | } else | |
1376 | return -1; | |
1377 | return 0; | |
1378 | } | |
5b820d9e NT |
1379 | |
1380 | static struct ecommunity *bgp_aggr_ecommunity_lookup( | |
1381 | struct bgp_aggregate *aggregate, | |
1382 | struct ecommunity *ecommunity) | |
1383 | { | |
1384 | return hash_lookup(aggregate->ecommunity_hash, ecommunity); | |
1385 | } | |
1386 | ||
1387 | static void *bgp_aggr_ecommunty_hash_alloc(void *p) | |
1388 | { | |
1389 | struct ecommunity *ref = (struct ecommunity *)p; | |
1390 | struct ecommunity *ecommunity = NULL; | |
1391 | ||
1392 | ecommunity = ecommunity_dup(ref); | |
1393 | return ecommunity; | |
1394 | } | |
1395 | ||
7f5818fb | 1396 | static void bgp_aggr_ecommunity_prepare(struct hash_bucket *hb, void *arg) |
5b820d9e | 1397 | { |
5b820d9e NT |
1398 | struct ecommunity *hb_ecommunity = hb->data; |
1399 | struct ecommunity **aggr_ecommunity = arg; | |
1400 | ||
4edd83f9 | 1401 | if (*aggr_ecommunity) |
1402 | *aggr_ecommunity = ecommunity_merge(*aggr_ecommunity, | |
1403 | hb_ecommunity); | |
1404 | else | |
5b820d9e NT |
1405 | *aggr_ecommunity = ecommunity_dup(hb_ecommunity); |
1406 | } | |
1407 | ||
1408 | void bgp_aggr_ecommunity_remove(void *arg) | |
1409 | { | |
1410 | struct ecommunity *ecommunity = arg; | |
1411 | ||
1412 | ecommunity_free(&ecommunity); | |
1413 | } | |
1414 | ||
1415 | void bgp_compute_aggregate_ecommunity(struct bgp_aggregate *aggregate, | |
1416 | struct ecommunity *ecommunity) | |
4edd83f9 | 1417 | { |
1418 | bgp_compute_aggregate_ecommunity_hash(aggregate, ecommunity); | |
1419 | bgp_compute_aggregate_ecommunity_val(aggregate); | |
1420 | } | |
1421 | ||
1422 | ||
1423 | void bgp_compute_aggregate_ecommunity_hash(struct bgp_aggregate *aggregate, | |
1424 | struct ecommunity *ecommunity) | |
5b820d9e NT |
1425 | { |
1426 | struct ecommunity *aggr_ecommunity = NULL; | |
1427 | ||
1428 | if ((aggregate == NULL) || (ecommunity == NULL)) | |
1429 | return; | |
1430 | ||
1431 | /* Create hash if not already created. | |
1432 | */ | |
1433 | if (aggregate->ecommunity_hash == NULL) | |
1434 | aggregate->ecommunity_hash = hash_create( | |
1435 | ecommunity_hash_make, ecommunity_cmp, | |
1436 | "BGP Aggregator ecommunity hash"); | |
1437 | ||
1438 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1439 | if (aggr_ecommunity == NULL) { | |
1440 | /* Insert ecommunity into hash. | |
1441 | */ | |
1442 | aggr_ecommunity = hash_get(aggregate->ecommunity_hash, | |
1443 | ecommunity, | |
1444 | bgp_aggr_ecommunty_hash_alloc); | |
4edd83f9 | 1445 | } |
5b820d9e | 1446 | |
4edd83f9 | 1447 | /* Increment reference counter. |
1448 | */ | |
1449 | aggr_ecommunity->refcnt++; | |
1450 | } | |
5b820d9e | 1451 | |
4edd83f9 | 1452 | void bgp_compute_aggregate_ecommunity_val(struct bgp_aggregate *aggregate) |
1453 | { | |
1454 | struct ecommunity *ecommerge = NULL; | |
1455 | ||
1456 | if (aggregate == NULL) | |
1457 | return; | |
1458 | ||
1459 | /* Re-compute aggregate's ecommunity. | |
1460 | */ | |
1461 | if (aggregate->ecommunity) | |
1462 | ecommunity_free(&aggregate->ecommunity); | |
1463 | if (aggregate->ecommunity_hash | |
1464 | && aggregate->ecommunity_hash->count) { | |
5b820d9e NT |
1465 | hash_iterate(aggregate->ecommunity_hash, |
1466 | bgp_aggr_ecommunity_prepare, | |
1467 | &aggregate->ecommunity); | |
4edd83f9 | 1468 | ecommerge = aggregate->ecommunity; |
1469 | aggregate->ecommunity = ecommunity_uniq_sort(ecommerge); | |
1470 | if (ecommerge) | |
1471 | ecommunity_free(&ecommerge); | |
5b820d9e | 1472 | } |
5b820d9e NT |
1473 | } |
1474 | ||
1475 | void bgp_remove_ecommunity_from_aggregate(struct bgp_aggregate *aggregate, | |
1476 | struct ecommunity *ecommunity) | |
1477 | { | |
1478 | struct ecommunity *aggr_ecommunity = NULL; | |
1479 | struct ecommunity *ret_ecomm = NULL; | |
1480 | ||
4edd83f9 | 1481 | if ((!aggregate) |
1482 | || (!aggregate->ecommunity_hash) | |
1483 | || (!ecommunity)) | |
5b820d9e NT |
1484 | return; |
1485 | ||
1486 | /* Look-up the ecommunity in the hash. | |
1487 | */ | |
1488 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1489 | if (aggr_ecommunity) { | |
1490 | aggr_ecommunity->refcnt--; | |
1491 | ||
1492 | if (aggr_ecommunity->refcnt == 0) { | |
1493 | ret_ecomm = hash_release(aggregate->ecommunity_hash, | |
1494 | aggr_ecommunity); | |
1495 | ecommunity_free(&ret_ecomm); | |
4edd83f9 | 1496 | bgp_compute_aggregate_ecommunity_val(aggregate); |
1497 | } | |
1498 | } | |
1499 | } | |
1500 | ||
1501 | void bgp_remove_ecomm_from_aggregate_hash(struct bgp_aggregate *aggregate, | |
1502 | struct ecommunity *ecommunity) | |
1503 | { | |
1504 | ||
1505 | struct ecommunity *aggr_ecommunity = NULL; | |
1506 | struct ecommunity *ret_ecomm = NULL; | |
5b820d9e | 1507 | |
4edd83f9 | 1508 | if ((!aggregate) |
1509 | || (!aggregate->ecommunity_hash) | |
1510 | || (!ecommunity)) | |
1511 | return; | |
5b820d9e | 1512 | |
4edd83f9 | 1513 | /* Look-up the ecommunity in the hash. |
1514 | */ | |
1515 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1516 | if (aggr_ecommunity) { | |
1517 | aggr_ecommunity->refcnt--; | |
1518 | ||
1519 | if (aggr_ecommunity->refcnt == 0) { | |
1520 | ret_ecomm = hash_release(aggregate->ecommunity_hash, | |
1521 | aggr_ecommunity); | |
1522 | ecommunity_free(&ret_ecomm); | |
5b820d9e NT |
1523 | } |
1524 | } | |
1525 | } | |
d901dc13 | 1526 | |
1527 | /* | |
1528 | * return the BGP link bandwidth extended community, if present; | |
1529 | * the actual bandwidth is returned via param | |
1530 | */ | |
1531 | const uint8_t *ecommunity_linkbw_present(struct ecommunity *ecom, uint32_t *bw) | |
1532 | { | |
1533 | const uint8_t *eval; | |
f6e07e1b | 1534 | uint32_t i; |
d901dc13 | 1535 | |
1536 | if (bw) | |
1537 | *bw = 0; | |
1538 | ||
1539 | if (!ecom || !ecom->size) | |
1540 | return NULL; | |
1541 | ||
1542 | for (i = 0; i < ecom->size; i++) { | |
1543 | const uint8_t *pnt; | |
1544 | uint8_t type, sub_type; | |
1545 | uint32_t bwval; | |
1546 | ||
1547 | eval = pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
1548 | type = *pnt++; | |
1549 | sub_type = *pnt++; | |
1550 | ||
1551 | if ((type == ECOMMUNITY_ENCODE_AS || | |
1552 | type == ECOMMUNITY_ENCODE_AS_NON_TRANS) && | |
1553 | sub_type == ECOMMUNITY_LINK_BANDWIDTH) { | |
1554 | pnt += 2; /* bandwidth is encoded as AS:val */ | |
1555 | pnt = ptr_get_be32(pnt, &bwval); | |
1556 | (void)pnt; /* consume value */ | |
1557 | if (bw) | |
27aa23a4 DA |
1558 | *bw = ecom->disable_ieee_floating |
1559 | ? bwval | |
1560 | : ieee_float_uint32_to_uint32( | |
1561 | bwval); | |
d901dc13 | 1562 | return eval; |
1563 | } | |
1564 | } | |
1565 | ||
1566 | return NULL; | |
1567 | } | |
7b651a32 | 1568 | |
1569 | ||
27aa23a4 DA |
1570 | struct ecommunity *ecommunity_replace_linkbw(as_t as, struct ecommunity *ecom, |
1571 | uint64_t cum_bw, | |
1572 | bool disable_ieee_floating) | |
7b651a32 | 1573 | { |
1574 | struct ecommunity *new; | |
1575 | struct ecommunity_val lb_eval; | |
1576 | const uint8_t *eval; | |
1577 | uint8_t type; | |
1578 | uint32_t cur_bw; | |
1579 | ||
1580 | /* Nothing to replace if link-bandwidth doesn't exist or | |
1581 | * is non-transitive - just return existing extcommunity. | |
1582 | */ | |
1583 | new = ecom; | |
1584 | if (!ecom || !ecom->size) | |
1585 | return new; | |
1586 | ||
1587 | eval = ecommunity_linkbw_present(ecom, &cur_bw); | |
1588 | if (!eval) | |
1589 | return new; | |
1590 | ||
1591 | type = *eval; | |
1592 | if (type & ECOMMUNITY_FLAG_NON_TRANSITIVE) | |
1593 | return new; | |
1594 | ||
1595 | /* Transitive link-bandwidth exists, replace with the passed | |
1596 | * (cumulative) bandwidth value. We need to create a new | |
1597 | * extcommunity for this - refer to AS-Path replace function | |
1598 | * for reference. | |
1599 | */ | |
1600 | if (cum_bw > 0xFFFFFFFF) | |
1601 | cum_bw = 0xFFFFFFFF; | |
27aa23a4 DA |
1602 | encode_lb_extcomm(as > BGP_AS_MAX ? BGP_AS_TRANS : as, cum_bw, false, |
1603 | &lb_eval, disable_ieee_floating); | |
7b651a32 | 1604 | new = ecommunity_dup(ecom); |
1605 | ecommunity_add_val(new, &lb_eval, true, true); | |
1606 | ||
1607 | return new; | |
1608 | } |