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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
718e3744 | 2 | /* BGP Extended Communities Attribute |
896014f4 | 3 | * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org> |
896014f4 | 4 | */ |
718e3744 | 5 | |
6 | #include <zebra.h> | |
7 | ||
8 | #include "hash.h" | |
9 | #include "memory.h" | |
10 | #include "prefix.h" | |
11 | #include "command.h" | |
3f9c7369 | 12 | #include "queue.h" |
039f3a34 | 13 | #include "filter.h" |
3f65c5b1 | 14 | #include "jhash.h" |
937652c6 | 15 | #include "stream.h" |
718e3744 | 16 | |
23d0a753 DA |
17 | #include "lib/printfrr.h" |
18 | ||
718e3744 | 19 | #include "bgpd/bgpd.h" |
20 | #include "bgpd/bgp_ecommunity.h" | |
57d187bc | 21 | #include "bgpd/bgp_lcommunity.h" |
0b2aa3a0 | 22 | #include "bgpd/bgp_aspath.h" |
a8d72b61 | 23 | #include "bgpd/bgp_flowspec_private.h" |
dacf6ec1 | 24 | #include "bgpd/bgp_pbr.h" |
a8d72b61 PG |
25 | |
26 | /* struct used to dump the rate contained in FS set traffic-rate EC */ | |
27 | union traffic_rate { | |
28 | float rate_float; | |
29 | uint8_t rate_byte[4]; | |
30 | }; | |
718e3744 | 31 | |
32 | /* Hash of community attribute. */ | |
ffa4e2c4 | 33 | static struct hash *ecomhash; |
6b0655a2 | 34 | |
718e3744 | 35 | /* Allocate a new ecommunities. */ |
d62a17ae | 36 | struct ecommunity *ecommunity_new(void) |
718e3744 | 37 | { |
9a659715 PG |
38 | struct ecommunity *ecom; |
39 | ||
40 | ecom = (struct ecommunity *)XCALLOC(MTYPE_ECOMMUNITY, | |
41 | sizeof(struct ecommunity)); | |
42 | ecom->unit_size = ECOMMUNITY_SIZE; | |
43 | return ecom; | |
718e3744 | 44 | } |
45 | ||
c7ee6c35 DS |
46 | void ecommunity_strfree(char **s) |
47 | { | |
48 | XFREE(MTYPE_ECOMMUNITY_STR, *s); | |
49 | } | |
50 | ||
3b7e8d0f | 51 | /* Free ecommunities. */ |
d62a17ae | 52 | void ecommunity_free(struct ecommunity **ecom) |
718e3744 | 53 | { |
2c15754e JC |
54 | if (!(*ecom)) |
55 | return; | |
56 | ||
0a22ddfb QY |
57 | XFREE(MTYPE_ECOMMUNITY_VAL, (*ecom)->val); |
58 | XFREE(MTYPE_ECOMMUNITY_STR, (*ecom)->str); | |
d62a17ae | 59 | XFREE(MTYPE_ECOMMUNITY, *ecom); |
718e3744 | 60 | } |
61 | ||
d62a17ae | 62 | static void ecommunity_hash_free(struct ecommunity *ecom) |
7bae2fb9 | 63 | { |
d62a17ae | 64 | ecommunity_free(&ecom); |
7bae2fb9 LB |
65 | } |
66 | ||
67 | ||
718e3744 | 68 | /* Add a new Extended Communities value to Extended Communities |
69 | Attribute structure. When the value is already exists in the | |
70 | structure, we don't add the value. Newly added value is sorted by | |
71 | numerical order. When the value is added to the structure return 1 | |
1207a5bc | 72 | else return 0. |
73 | The additional parameters 'unique' and 'overwrite' ensure a particular | |
74 | extended community (based on type and sub-type) is present only | |
75 | once and whether the new value should replace what is existing or | |
76 | not. | |
77 | */ | |
4371bf91 PG |
78 | static bool ecommunity_add_val_internal(struct ecommunity *ecom, |
79 | const void *eval, | |
80 | bool unique, bool overwrite, | |
81 | uint8_t ecom_size) | |
718e3744 | 82 | { |
f6e07e1b | 83 | uint32_t c, ins_idx; |
9a659715 | 84 | const struct ecommunity_val *eval4 = (struct ecommunity_val *)eval; |
4371bf91 PG |
85 | const struct ecommunity_val_ipv6 *eval6 = |
86 | (struct ecommunity_val_ipv6 *)eval; | |
d62a17ae | 87 | |
91085f97 | 88 | /* When this is fist value, just add it. */ |
d62a17ae | 89 | if (ecom->val == NULL) { |
91085f97 | 90 | ecom->size = 1; |
9a659715 PG |
91 | ecom->val = XMALLOC(MTYPE_ECOMMUNITY_VAL, |
92 | ecom_length_size(ecom, ecom_size)); | |
93 | memcpy(ecom->val, eval, ecom_size); | |
3dc339cd | 94 | return true; |
d62a17ae | 95 | } |
96 | ||
97 | /* If the value already exists in the structure return 0. */ | |
1207a5bc | 98 | /* check also if the extended community itself exists. */ |
d62a17ae | 99 | c = 0; |
9a659715 | 100 | |
f6e07e1b | 101 | ins_idx = UINT32_MAX; |
91085f97 | 102 | for (uint8_t *p = ecom->val; c < ecom->size; |
9a659715 | 103 | p += ecom_size, c++) { |
1207a5bc | 104 | if (unique) { |
9a659715 PG |
105 | if (ecom_size == ECOMMUNITY_SIZE) { |
106 | if (p[0] == eval4->val[0] && | |
107 | p[1] == eval4->val[1]) { | |
108 | if (overwrite) { | |
4371bf91 PG |
109 | memcpy(p, eval4->val, |
110 | ecom_size); | |
9a659715 PG |
111 | return true; |
112 | } | |
113 | return false; | |
114 | } | |
115 | } else { | |
116 | if (p[0] == eval6->val[0] && | |
117 | p[1] == eval6->val[1]) { | |
118 | if (overwrite) { | |
4371bf91 PG |
119 | memcpy(p, eval6->val, |
120 | ecom_size); | |
9a659715 PG |
121 | return true; |
122 | } | |
123 | return false; | |
1207a5bc | 124 | } |
1207a5bc | 125 | } |
126 | } | |
9a659715 | 127 | int ret = memcmp(p, eval, ecom_size); |
d62a17ae | 128 | if (ret == 0) |
e2369003 | 129 | return false; |
1207a5bc | 130 | if (ret > 0) { |
131 | if (!unique) | |
132 | break; | |
f6e07e1b | 133 | if (ins_idx == UINT32_MAX) |
1207a5bc | 134 | ins_idx = c; |
135 | } | |
d62a17ae | 136 | } |
137 | ||
f6e07e1b | 138 | if (ins_idx == UINT32_MAX) |
1207a5bc | 139 | ins_idx = c; |
140 | ||
d62a17ae | 141 | /* Add the value to the structure with numerical sorting. */ |
142 | ecom->size++; | |
91085f97 | 143 | ecom->val = XREALLOC(MTYPE_ECOMMUNITY_VAL, ecom->val, |
9a659715 PG |
144 | ecom_length_size(ecom, ecom_size)); |
145 | ||
9a659715 PG |
146 | memmove(ecom->val + ((ins_idx + 1) * ecom_size), |
147 | ecom->val + (ins_idx * ecom_size), | |
148 | (ecom->size - 1 - ins_idx) * ecom_size); | |
149 | memcpy(ecom->val + (ins_idx * ecom_size), | |
150 | eval, ecom_size); | |
d62a17ae | 151 | |
3dc339cd | 152 | return true; |
718e3744 | 153 | } |
154 | ||
9a659715 | 155 | /* Add a new Extended Communities value to Extended Communities |
4371bf91 PG |
156 | * Attribute structure. When the value is already exists in the |
157 | * structure, we don't add the value. Newly added value is sorted by | |
158 | * numerical order. When the value is added to the structure return 1 | |
159 | * else return 0. | |
160 | */ | |
9a659715 PG |
161 | bool ecommunity_add_val(struct ecommunity *ecom, struct ecommunity_val *eval, |
162 | bool unique, bool overwrite) | |
163 | { | |
164 | return ecommunity_add_val_internal(ecom, (const void *)eval, unique, | |
165 | overwrite, ECOMMUNITY_SIZE); | |
166 | } | |
167 | ||
4371bf91 PG |
168 | bool ecommunity_add_val_ipv6(struct ecommunity *ecom, |
169 | struct ecommunity_val_ipv6 *eval, | |
170 | bool unique, bool overwrite) | |
9a659715 PG |
171 | { |
172 | return ecommunity_add_val_internal(ecom, (const void *)eval, unique, | |
173 | overwrite, IPV6_ECOMMUNITY_SIZE); | |
174 | } | |
175 | ||
176 | static struct ecommunity * | |
177 | ecommunity_uniq_sort_internal(struct ecommunity *ecom, | |
178 | unsigned short ecom_size) | |
718e3744 | 179 | { |
f6e07e1b | 180 | uint32_t i; |
d62a17ae | 181 | struct ecommunity *new; |
9a659715 | 182 | const void *eval; |
d62a17ae | 183 | |
184 | if (!ecom) | |
185 | return NULL; | |
186 | ||
187 | new = ecommunity_new(); | |
9a659715 | 188 | new->unit_size = ecom_size; |
27aa23a4 | 189 | new->disable_ieee_floating = ecom->disable_ieee_floating; |
d62a17ae | 190 | |
191 | for (i = 0; i < ecom->size; i++) { | |
8f242187 | 192 | eval = (void *)(ecom->val + (i * ecom_size)); |
9a659715 | 193 | ecommunity_add_val_internal(new, eval, false, false, ecom_size); |
d62a17ae | 194 | } |
195 | return new; | |
718e3744 | 196 | } |
197 | ||
544be979 | 198 | /* This function takes pointer to Extended Communites structure then |
4371bf91 PG |
199 | * create a new Extended Communities structure by uniq and sort each |
200 | * Extended Communities value. | |
201 | */ | |
9a659715 PG |
202 | struct ecommunity *ecommunity_uniq_sort(struct ecommunity *ecom) |
203 | { | |
204 | return ecommunity_uniq_sort_internal(ecom, ECOMMUNITY_SIZE); | |
205 | } | |
206 | ||
718e3744 | 207 | /* Parse Extended Communites Attribute in BGP packet. */ |
9a659715 | 208 | static struct ecommunity *ecommunity_parse_internal(uint8_t *pnt, |
27aa23a4 DA |
209 | unsigned short length, |
210 | unsigned short size_ecom, | |
211 | bool disable_ieee_floating) | |
718e3744 | 212 | { |
d62a17ae | 213 | struct ecommunity tmp; |
214 | struct ecommunity *new; | |
718e3744 | 215 | |
d62a17ae | 216 | /* Length check. */ |
9a659715 | 217 | if (length % size_ecom) |
d62a17ae | 218 | return NULL; |
718e3744 | 219 | |
d62a17ae | 220 | /* Prepare tmporary structure for making a new Extended Communities |
221 | Attribute. */ | |
9a659715 | 222 | tmp.size = length / size_ecom; |
d62a17ae | 223 | tmp.val = pnt; |
27aa23a4 | 224 | tmp.disable_ieee_floating = disable_ieee_floating; |
718e3744 | 225 | |
d62a17ae | 226 | /* Create a new Extended Communities Attribute by uniq and sort each |
227 | Extended Communities value */ | |
9a659715 | 228 | new = ecommunity_uniq_sort_internal(&tmp, size_ecom); |
718e3744 | 229 | |
d62a17ae | 230 | return ecommunity_intern(new); |
718e3744 | 231 | } |
232 | ||
27aa23a4 DA |
233 | struct ecommunity *ecommunity_parse(uint8_t *pnt, unsigned short length, |
234 | bool disable_ieee_floating) | |
9a659715 | 235 | { |
27aa23a4 DA |
236 | return ecommunity_parse_internal(pnt, length, ECOMMUNITY_SIZE, |
237 | disable_ieee_floating); | |
9a659715 PG |
238 | } |
239 | ||
27aa23a4 DA |
240 | struct ecommunity *ecommunity_parse_ipv6(uint8_t *pnt, unsigned short length, |
241 | bool disable_ieee_floating) | |
9a659715 | 242 | { |
27aa23a4 DA |
243 | return ecommunity_parse_internal(pnt, length, IPV6_ECOMMUNITY_SIZE, |
244 | disable_ieee_floating); | |
9a659715 PG |
245 | } |
246 | ||
718e3744 | 247 | /* Duplicate the Extended Communities Attribute structure. */ |
d62a17ae | 248 | struct ecommunity *ecommunity_dup(struct ecommunity *ecom) |
718e3744 | 249 | { |
d62a17ae | 250 | struct ecommunity *new; |
251 | ||
252 | new = XCALLOC(MTYPE_ECOMMUNITY, sizeof(struct ecommunity)); | |
253 | new->size = ecom->size; | |
9a659715 | 254 | new->unit_size = ecom->unit_size; |
d62a17ae | 255 | if (new->size) { |
256 | new->val = XMALLOC(MTYPE_ECOMMUNITY_VAL, | |
9a659715 | 257 | ecom->size * ecom->unit_size); |
8da920d3 DS |
258 | memcpy(new->val, ecom->val, |
259 | (size_t)ecom->size * (size_t)ecom->unit_size); | |
d62a17ae | 260 | } else |
261 | new->val = NULL; | |
262 | return new; | |
718e3744 | 263 | } |
264 | ||
639caccf | 265 | /* Return string representation of ecommunities attribute. */ |
d62a17ae | 266 | char *ecommunity_str(struct ecommunity *ecom) |
4372df71 | 267 | { |
d62a17ae | 268 | if (!ecom->str) |
269 | ecom->str = | |
270 | ecommunity_ecom2str(ecom, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
271 | return ecom->str; | |
4372df71 | 272 | } |
273 | ||
718e3744 | 274 | /* Merge two Extended Communities Attribute structure. */ |
d62a17ae | 275 | struct ecommunity *ecommunity_merge(struct ecommunity *ecom1, |
276 | struct ecommunity *ecom2) | |
718e3744 | 277 | { |
0b04fa0e DS |
278 | ecom1->val = XREALLOC(MTYPE_ECOMMUNITY_VAL, ecom1->val, |
279 | (size_t)(ecom1->size + ecom2->size) | |
280 | * (size_t)ecom1->unit_size); | |
d62a17ae | 281 | |
9a659715 | 282 | memcpy(ecom1->val + (ecom1->size * ecom1->unit_size), ecom2->val, |
8da920d3 | 283 | (size_t)ecom2->size * (size_t)ecom1->unit_size); |
d62a17ae | 284 | ecom1->size += ecom2->size; |
285 | ||
286 | return ecom1; | |
718e3744 | 287 | } |
288 | ||
289 | /* Intern Extended Communities Attribute. */ | |
d62a17ae | 290 | struct ecommunity *ecommunity_intern(struct ecommunity *ecom) |
718e3744 | 291 | { |
d62a17ae | 292 | struct ecommunity *find; |
718e3744 | 293 | |
d62a17ae | 294 | assert(ecom->refcnt == 0); |
d62a17ae | 295 | find = (struct ecommunity *)hash_get(ecomhash, ecom, hash_alloc_intern); |
d62a17ae | 296 | if (find != ecom) |
297 | ecommunity_free(&ecom); | |
718e3744 | 298 | |
d62a17ae | 299 | find->refcnt++; |
718e3744 | 300 | |
d62a17ae | 301 | if (!find->str) |
302 | find->str = | |
303 | ecommunity_ecom2str(find, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
718e3744 | 304 | |
d62a17ae | 305 | return find; |
718e3744 | 306 | } |
307 | ||
308 | /* Unintern Extended Communities Attribute. */ | |
d62a17ae | 309 | void ecommunity_unintern(struct ecommunity **ecom) |
718e3744 | 310 | { |
d62a17ae | 311 | struct ecommunity *ret; |
312 | ||
df7d4670 DS |
313 | if (!*ecom) |
314 | return; | |
315 | ||
d62a17ae | 316 | if ((*ecom)->refcnt) |
317 | (*ecom)->refcnt--; | |
318 | ||
319 | /* Pull off from hash. */ | |
320 | if ((*ecom)->refcnt == 0) { | |
321 | /* Extended community must be in the hash. */ | |
322 | ret = (struct ecommunity *)hash_release(ecomhash, *ecom); | |
323 | assert(ret != NULL); | |
324 | ||
325 | ecommunity_free(ecom); | |
326 | } | |
718e3744 | 327 | } |
328 | ||
329 | /* Utinity function to make hash key. */ | |
d8b87afe | 330 | unsigned int ecommunity_hash_make(const void *arg) |
718e3744 | 331 | { |
d62a17ae | 332 | const struct ecommunity *ecom = arg; |
9a659715 | 333 | int size = ecom->size * ecom->unit_size; |
d62a17ae | 334 | |
3f65c5b1 | 335 | return jhash(ecom->val, size, 0x564321ab); |
718e3744 | 336 | } |
337 | ||
338 | /* Compare two Extended Communities Attribute structure. */ | |
74df8d6d | 339 | bool ecommunity_cmp(const void *arg1, const void *arg2) |
718e3744 | 340 | { |
d62a17ae | 341 | const struct ecommunity *ecom1 = arg1; |
342 | const struct ecommunity *ecom2 = arg2; | |
343 | ||
344 | if (ecom1 == NULL && ecom2 == NULL) | |
74df8d6d | 345 | return true; |
813d4307 | 346 | |
d62a17ae | 347 | if (ecom1 == NULL || ecom2 == NULL) |
74df8d6d | 348 | return false; |
813d4307 | 349 | |
9a659715 PG |
350 | if (ecom1->unit_size != ecom2->unit_size) |
351 | return false; | |
352 | ||
d62a17ae | 353 | return (ecom1->size == ecom2->size |
9a659715 PG |
354 | && memcmp(ecom1->val, ecom2->val, ecom1->size * |
355 | ecom1->unit_size) == 0); | |
718e3744 | 356 | } |
357 | ||
358 | /* Initialize Extended Comminities related hash. */ | |
d62a17ae | 359 | void ecommunity_init(void) |
718e3744 | 360 | { |
996c9314 | 361 | ecomhash = hash_create(ecommunity_hash_make, ecommunity_cmp, |
3f65c5b1 | 362 | "BGP ecommunity hash"); |
718e3744 | 363 | } |
228da428 | 364 | |
d62a17ae | 365 | void ecommunity_finish(void) |
228da428 | 366 | { |
d8bc11a5 | 367 | hash_clean_and_free(&ecomhash, (void (*)(void *))ecommunity_hash_free); |
228da428 | 368 | } |
6b0655a2 | 369 | |
718e3744 | 370 | /* Extended Communities token enum. */ |
d62a17ae | 371 | enum ecommunity_token { |
372 | ecommunity_token_unknown = 0, | |
373 | ecommunity_token_rt, | |
374 | ecommunity_token_soo, | |
375 | ecommunity_token_val, | |
9a659715 PG |
376 | ecommunity_token_rt6, |
377 | ecommunity_token_val6, | |
718e3744 | 378 | }; |
379 | ||
7b27cf7b DA |
380 | static const char *ecommunity_origin_validation_state2str( |
381 | enum ecommunity_origin_validation_states state) | |
382 | { | |
383 | switch (state) { | |
384 | case ECOMMUNITY_ORIGIN_VALIDATION_STATE_VALID: | |
385 | return "valid"; | |
386 | case ECOMMUNITY_ORIGIN_VALIDATION_STATE_NOTFOUND: | |
387 | return "not-found"; | |
388 | case ECOMMUNITY_ORIGIN_VALIDATION_STATE_INVALID: | |
389 | return "invalid"; | |
390 | case ECOMMUNITY_ORIGIN_VALIDATION_STATE_NOTUSED: | |
391 | return "not-used"; | |
392 | } | |
393 | ||
394 | return "ERROR"; | |
395 | } | |
396 | ||
397 | static void ecommunity_origin_validation_state_str(char *buf, size_t bufsz, | |
398 | uint8_t *ptr) | |
399 | { | |
400 | /* Origin Validation State is encoded in the last octet | |
401 | * | |
402 | * 0 1 2 3 | |
403 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
404 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
405 | * | 0x43 | 0x00 | Reserved | | |
406 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
407 | * | Reserved |validationstate| | |
408 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
409 | */ | |
410 | uint8_t state = *(ptr + ECOMMUNITY_SIZE - 3); | |
411 | ||
412 | snprintf(buf, bufsz, "OVS:%s", | |
413 | ecommunity_origin_validation_state2str(state)); | |
414 | ||
415 | (void)ptr; /* consume value */ | |
416 | } | |
417 | ||
9a659715 PG |
418 | static int ecommunity_encode_internal(uint8_t type, uint8_t sub_type, |
419 | int trans, as_t as, | |
420 | struct in_addr *ip, | |
421 | struct in6_addr *ip6, | |
422 | uint32_t val, | |
423 | void *eval_ptr) | |
c5900768 | 424 | { |
9a659715 PG |
425 | struct ecommunity_val *eval = (struct ecommunity_val *)eval_ptr; |
426 | struct ecommunity_val_ipv6 *eval6 = | |
427 | (struct ecommunity_val_ipv6 *)eval_ptr; | |
428 | ||
d62a17ae | 429 | assert(eval); |
430 | if (type == ECOMMUNITY_ENCODE_AS) { | |
431 | if (as > BGP_AS_MAX) | |
432 | return -1; | |
433 | } else if (type == ECOMMUNITY_ENCODE_IP | |
434 | || type == ECOMMUNITY_ENCODE_AS4) { | |
435 | if (val > UINT16_MAX) | |
436 | return -1; | |
9a659715 PG |
437 | } else if (type == ECOMMUNITY_ENCODE_TRANS_EXP && |
438 | sub_type == ECOMMUNITY_FLOWSPEC_REDIRECT_IPV6 && | |
439 | (!ip6 || val > UINT16_MAX)) { | |
440 | return -1; | |
d62a17ae | 441 | } |
442 | ||
443 | /* Fill in the values. */ | |
444 | eval->val[0] = type; | |
445 | if (!trans) | |
446 | eval->val[0] |= ECOMMUNITY_FLAG_NON_TRANSITIVE; | |
447 | eval->val[1] = sub_type; | |
448 | if (type == ECOMMUNITY_ENCODE_AS) { | |
449 | eval->val[2] = (as >> 8) & 0xff; | |
450 | eval->val[3] = as & 0xff; | |
451 | eval->val[4] = (val >> 24) & 0xff; | |
452 | eval->val[5] = (val >> 16) & 0xff; | |
453 | eval->val[6] = (val >> 8) & 0xff; | |
454 | eval->val[7] = val & 0xff; | |
455 | } else if (type == ECOMMUNITY_ENCODE_IP) { | |
9a659715 | 456 | memcpy(&eval->val[2], ip, sizeof(struct in_addr)); |
d62a17ae | 457 | eval->val[6] = (val >> 8) & 0xff; |
458 | eval->val[7] = val & 0xff; | |
9a659715 PG |
459 | } else if (type == ECOMMUNITY_ENCODE_TRANS_EXP && |
460 | sub_type == ECOMMUNITY_FLOWSPEC_REDIRECT_IPV6) { | |
461 | memcpy(&eval6->val[2], ip6, sizeof(struct in6_addr)); | |
462 | eval6->val[18] = (val >> 8) & 0xff; | |
463 | eval6->val[19] = val & 0xff; | |
d62a17ae | 464 | } else { |
465 | eval->val[2] = (as >> 24) & 0xff; | |
466 | eval->val[3] = (as >> 16) & 0xff; | |
467 | eval->val[4] = (as >> 8) & 0xff; | |
468 | eval->val[5] = as & 0xff; | |
469 | eval->val[6] = (val >> 8) & 0xff; | |
470 | eval->val[7] = val & 0xff; | |
471 | } | |
472 | ||
473 | return 0; | |
c5900768 | 474 | } |
475 | ||
9a659715 PG |
476 | /* |
477 | * Encode BGP extended community from passed values. Supports types | |
478 | * defined in RFC 4360 and well-known sub-types. | |
479 | */ | |
480 | static int ecommunity_encode(uint8_t type, uint8_t sub_type, int trans, as_t as, | |
481 | struct in_addr ip, uint32_t val, | |
482 | struct ecommunity_val *eval) | |
483 | { | |
484 | return ecommunity_encode_internal(type, sub_type, trans, as, | |
485 | &ip, NULL, val, (void *)eval); | |
486 | } | |
487 | ||
718e3744 | 488 | /* Get next Extended Communities token from the string. */ |
d62a17ae | 489 | static const char *ecommunity_gettoken(const char *str, |
9a659715 | 490 | void *eval_ptr, |
d62a17ae | 491 | enum ecommunity_token *token) |
718e3744 | 492 | { |
d62a17ae | 493 | int ret; |
494 | int dot = 0; | |
495 | int digit = 0; | |
496 | int separator = 0; | |
497 | const char *p = str; | |
498 | char *endptr; | |
499 | struct in_addr ip; | |
9a659715 | 500 | struct in6_addr ip6; |
d62a17ae | 501 | as_t as = 0; |
d7c0a89a QY |
502 | uint32_t val = 0; |
503 | uint8_t ecomm_type; | |
d62a17ae | 504 | char buf[INET_ADDRSTRLEN + 1]; |
9a659715 | 505 | struct ecommunity_val *eval = (struct ecommunity_val *)eval_ptr; |
d62a17ae | 506 | /* Skip white space. */ |
fefa5e0f | 507 | while (isspace((unsigned char)*p)) { |
d62a17ae | 508 | p++; |
509 | str++; | |
718e3744 | 510 | } |
d62a17ae | 511 | |
512 | /* Check the end of the line. */ | |
513 | if (*p == '\0') | |
514 | return NULL; | |
515 | ||
516 | /* "rt" and "soo" keyword parse. */ | |
fefa5e0f | 517 | if (!isdigit((unsigned char)*p)) { |
d62a17ae | 518 | /* "rt" match check. */ |
fefa5e0f | 519 | if (tolower((unsigned char)*p) == 'r') { |
d62a17ae | 520 | p++; |
fefa5e0f | 521 | if (tolower((unsigned char)*p) == 't') { |
d62a17ae | 522 | p++; |
9a659715 PG |
523 | if (*p != '\0' && tolower((int)*p) == '6') |
524 | *token = ecommunity_token_rt6; | |
525 | else | |
526 | *token = ecommunity_token_rt; | |
d62a17ae | 527 | return p; |
528 | } | |
fefa5e0f | 529 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 530 | *token = ecommunity_token_rt; |
531 | return p; | |
532 | } | |
533 | goto error; | |
718e3744 | 534 | } |
d62a17ae | 535 | /* "soo" match check. */ |
fefa5e0f | 536 | else if (tolower((unsigned char)*p) == 's') { |
d62a17ae | 537 | p++; |
fefa5e0f | 538 | if (tolower((unsigned char)*p) == 'o') { |
d62a17ae | 539 | p++; |
fefa5e0f | 540 | if (tolower((unsigned char)*p) == 'o') { |
d62a17ae | 541 | p++; |
542 | *token = ecommunity_token_soo; | |
543 | return p; | |
544 | } | |
fefa5e0f | 545 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 546 | *token = ecommunity_token_soo; |
547 | return p; | |
548 | } | |
549 | goto error; | |
550 | } | |
fefa5e0f | 551 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 552 | *token = ecommunity_token_soo; |
553 | return p; | |
554 | } | |
555 | goto error; | |
718e3744 | 556 | } |
d62a17ae | 557 | goto error; |
718e3744 | 558 | } |
d62a17ae | 559 | |
560 | /* What a mess, there are several possibilities: | |
561 | * | |
562 | * a) A.B.C.D:MN | |
563 | * b) EF:OPQR | |
564 | * c) GHJK:MN | |
9a659715 | 565 | * d) <IPV6>:MN (only with rt6) |
d62a17ae | 566 | * |
567 | * A.B.C.D: Four Byte IP | |
568 | * EF: Two byte ASN | |
569 | * GHJK: Four-byte ASN | |
570 | * MN: Two byte value | |
571 | * OPQR: Four byte value | |
572 | * | |
573 | */ | |
9a659715 PG |
574 | /* IPv6 case : look for last ':' */ |
575 | if (*token == ecommunity_token_rt6 || | |
576 | *token == ecommunity_token_val6) { | |
577 | char *limit; | |
578 | ||
579 | limit = endptr = strrchr(p, ':'); | |
580 | if (!endptr) | |
581 | goto error; | |
8f242187 | 582 | |
9a659715 PG |
583 | endptr++; |
584 | as = strtoul(endptr, &endptr, 10); | |
585 | if (*endptr != '\0' || as == BGP_AS4_MAX) | |
586 | goto error; | |
8f242187 | 587 | |
9a659715 PG |
588 | memcpy(buf, p, (limit - p)); |
589 | buf[limit - p] = '\0'; | |
590 | ret = inet_pton(AF_INET6, buf, &ip6); | |
591 | if (ret == 0) | |
592 | goto error; | |
8f242187 | 593 | |
9a659715 PG |
594 | ecomm_type = ECOMMUNITY_ENCODE_TRANS_EXP; |
595 | if (ecommunity_encode_internal(ecomm_type, | |
8f242187 PG |
596 | ECOMMUNITY_FLOWSPEC_REDIRECT_IPV6, |
597 | 1, 0, NULL, &ip6, as, eval_ptr)) | |
9a659715 | 598 | goto error; |
8f242187 | 599 | |
9a659715 PG |
600 | *token = ecommunity_token_val6; |
601 | while (isdigit((int)*p) || *p == ':' || *p == '.') { | |
602 | p++; | |
603 | } | |
604 | return p; | |
605 | } | |
fefa5e0f | 606 | while (isdigit((unsigned char)*p) || *p == ':' || *p == '.') { |
d62a17ae | 607 | if (*p == ':') { |
608 | if (separator) | |
609 | goto error; | |
610 | ||
611 | separator = 1; | |
612 | digit = 0; | |
613 | ||
614 | if ((p - str) > INET_ADDRSTRLEN) | |
615 | goto error; | |
616 | memset(buf, 0, INET_ADDRSTRLEN + 1); | |
617 | memcpy(buf, str, p - str); | |
618 | ||
619 | if (dot) { | |
620 | /* Parsing A.B.C.D in: | |
621 | * A.B.C.D:MN | |
622 | */ | |
623 | ret = inet_aton(buf, &ip); | |
624 | if (ret == 0) | |
625 | goto error; | |
626 | } else { | |
627 | /* ASN */ | |
628 | as = strtoul(buf, &endptr, 10); | |
629 | if (*endptr != '\0' || as == BGP_AS4_MAX) | |
630 | goto error; | |
631 | } | |
632 | } else if (*p == '.') { | |
633 | if (separator) | |
634 | goto error; | |
635 | dot++; | |
636 | if (dot > 4) | |
637 | goto error; | |
638 | } else { | |
639 | digit = 1; | |
640 | ||
641 | /* We're past the IP/ASN part */ | |
642 | if (separator) { | |
643 | val *= 10; | |
644 | val += (*p - '0'); | |
645 | } | |
646 | } | |
647 | p++; | |
718e3744 | 648 | } |
d62a17ae | 649 | |
650 | /* Low digit part must be there. */ | |
651 | if (!digit || !separator) | |
652 | goto error; | |
653 | ||
654 | /* Encode result into extended community. */ | |
655 | if (dot) | |
656 | ecomm_type = ECOMMUNITY_ENCODE_IP; | |
657 | else if (as > BGP_AS_MAX) | |
658 | ecomm_type = ECOMMUNITY_ENCODE_AS4; | |
659 | else | |
660 | ecomm_type = ECOMMUNITY_ENCODE_AS; | |
661 | if (ecommunity_encode(ecomm_type, 0, 1, as, ip, val, eval)) | |
662 | goto error; | |
663 | *token = ecommunity_token_val; | |
664 | return p; | |
665 | ||
666 | error: | |
667 | *token = ecommunity_token_unknown; | |
668 | return p; | |
718e3744 | 669 | } |
670 | ||
9a659715 PG |
671 | static struct ecommunity *ecommunity_str2com_internal(const char *str, int type, |
672 | int keyword_included, | |
673 | bool is_ipv6_extcomm) | |
718e3744 | 674 | { |
d62a17ae | 675 | struct ecommunity *ecom = NULL; |
676 | enum ecommunity_token token = ecommunity_token_unknown; | |
9a659715 | 677 | struct ecommunity_val_ipv6 eval; |
d62a17ae | 678 | int keyword = 0; |
679 | ||
9a659715 PG |
680 | if (is_ipv6_extcomm) |
681 | token = ecommunity_token_rt6; | |
682 | while ((str = ecommunity_gettoken(str, (void *)&eval, &token))) { | |
d62a17ae | 683 | switch (token) { |
684 | case ecommunity_token_rt: | |
125ef88d | 685 | case ecommunity_token_rt6: |
d62a17ae | 686 | case ecommunity_token_soo: |
687 | if (!keyword_included || keyword) { | |
688 | if (ecom) | |
689 | ecommunity_free(&ecom); | |
690 | return NULL; | |
691 | } | |
692 | keyword = 1; | |
693 | ||
9a659715 PG |
694 | if (token == ecommunity_token_rt || |
695 | token == ecommunity_token_rt6) { | |
d62a17ae | 696 | type = ECOMMUNITY_ROUTE_TARGET; |
697 | } | |
698 | if (token == ecommunity_token_soo) { | |
699 | type = ECOMMUNITY_SITE_ORIGIN; | |
700 | } | |
701 | break; | |
702 | case ecommunity_token_val: | |
703 | if (keyword_included) { | |
704 | if (!keyword) { | |
8f242187 | 705 | ecommunity_free(&ecom); |
d62a17ae | 706 | return NULL; |
707 | } | |
708 | keyword = 0; | |
709 | } | |
710 | if (ecom == NULL) | |
711 | ecom = ecommunity_new(); | |
712 | eval.val[1] = type; | |
4371bf91 PG |
713 | ecommunity_add_val_internal(ecom, (void *)&eval, |
714 | false, false, | |
9a659715 PG |
715 | ecom->unit_size); |
716 | break; | |
717 | case ecommunity_token_val6: | |
718 | if (keyword_included) { | |
719 | if (!keyword) { | |
8f242187 | 720 | ecommunity_free(&ecom); |
9a659715 PG |
721 | return NULL; |
722 | } | |
723 | keyword = 0; | |
724 | } | |
725 | if (ecom == NULL) | |
726 | ecom = ecommunity_new(); | |
727 | ecom->unit_size = IPV6_ECOMMUNITY_SIZE; | |
728 | eval.val[1] = type; | |
729 | ecommunity_add_val_internal(ecom, (void *)&eval, false, false, | |
730 | ecom->unit_size); | |
d62a17ae | 731 | break; |
732 | case ecommunity_token_unknown: | |
d62a17ae | 733 | if (ecom) |
734 | ecommunity_free(&ecom); | |
735 | return NULL; | |
718e3744 | 736 | } |
718e3744 | 737 | } |
d62a17ae | 738 | return ecom; |
718e3744 | 739 | } |
740 | ||
9a659715 | 741 | /* Convert string to extended community attribute. |
4371bf91 PG |
742 | * |
743 | * When type is already known, please specify both str and type. str | |
744 | * should not include keyword such as "rt" and "soo". Type is | |
745 | * ECOMMUNITY_ROUTE_TARGET or ECOMMUNITY_SITE_ORIGIN. | |
746 | * keyword_included should be zero. | |
747 | * | |
748 | * For example route-map's "set extcommunity" command case: | |
749 | * | |
750 | * "rt 100:1 100:2 100:3" -> str = "100:1 100:2 100:3" | |
751 | * type = ECOMMUNITY_ROUTE_TARGET | |
752 | * keyword_included = 0 | |
753 | * | |
754 | * "soo 100:1" -> str = "100:1" | |
755 | * type = ECOMMUNITY_SITE_ORIGIN | |
756 | * keyword_included = 0 | |
757 | * | |
758 | * When string includes keyword for each extended community value. | |
759 | * Please specify keyword_included as non-zero value. | |
760 | * | |
761 | * For example standard extcommunity-list case: | |
762 | * | |
763 | * "rt 100:1 rt 100:2 soo 100:1" -> str = "rt 100:1 rt 100:2 soo 100:1" | |
764 | * type = 0 | |
765 | * keyword_include = 1 | |
766 | */ | |
9a659715 PG |
767 | struct ecommunity *ecommunity_str2com(const char *str, int type, |
768 | int keyword_included) | |
769 | { | |
770 | return ecommunity_str2com_internal(str, type, | |
771 | keyword_included, false); | |
772 | } | |
773 | ||
774 | struct ecommunity *ecommunity_str2com_ipv6(const char *str, int type, | |
775 | int keyword_included) | |
776 | { | |
777 | return ecommunity_str2com_internal(str, type, | |
778 | keyword_included, true); | |
779 | } | |
780 | ||
781 | static int ecommunity_rt_soo_str_internal(char *buf, size_t bufsz, | |
782 | const uint8_t *pnt, int type, | |
783 | int sub_type, int format, | |
784 | unsigned short ecom_size) | |
c5900768 | 785 | { |
d62a17ae | 786 | int len = 0; |
787 | const char *prefix; | |
9a659715 | 788 | char buf_local[INET6_ADDRSTRLEN]; |
d62a17ae | 789 | |
790 | /* For parse Extended Community attribute tupple. */ | |
5a0ccebf QY |
791 | struct ecommunity_as eas; |
792 | struct ecommunity_ip eip; | |
9a659715 | 793 | struct ecommunity_ip6 eip6; |
d62a17ae | 794 | |
795 | /* Determine prefix for string, if any. */ | |
796 | switch (format) { | |
797 | case ECOMMUNITY_FORMAT_COMMUNITY_LIST: | |
798 | prefix = (sub_type == ECOMMUNITY_ROUTE_TARGET ? "rt " : "soo "); | |
799 | break; | |
800 | case ECOMMUNITY_FORMAT_DISPLAY: | |
801 | prefix = (sub_type == ECOMMUNITY_ROUTE_TARGET ? "RT:" : "SoO:"); | |
802 | break; | |
803 | case ECOMMUNITY_FORMAT_ROUTE_MAP: | |
804 | prefix = ""; | |
805 | break; | |
806 | default: | |
807 | prefix = ""; | |
808 | break; | |
809 | } | |
810 | ||
811 | /* Put string into buffer. */ | |
812 | if (type == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 813 | pnt = ptr_get_be32(pnt, &eas.as); |
d62a17ae | 814 | eas.val = (*pnt++ << 8); |
815 | eas.val |= (*pnt++); | |
816 | ||
91085f97 | 817 | len = snprintf(buf, bufsz, "%s%u:%u", prefix, eas.as, eas.val); |
d62a17ae | 818 | } else if (type == ECOMMUNITY_ENCODE_AS) { |
9a659715 PG |
819 | if (ecom_size == ECOMMUNITY_SIZE) { |
820 | eas.as = (*pnt++ << 8); | |
821 | eas.as |= (*pnt++); | |
822 | pnt = ptr_get_be32(pnt, &eas.val); | |
d62a17ae | 823 | |
4371bf91 PG |
824 | len = snprintf(buf, bufsz, "%s%u:%u", prefix, eas.as, |
825 | eas.val); | |
9a659715 PG |
826 | } else { |
827 | /* this is an IPv6 ext community | |
c6423c31 | 828 | * first 16 bytes stands for IPv6 addres |
9a659715 PG |
829 | */ |
830 | memcpy(&eip6.ip, pnt, 16); | |
831 | pnt += 16; | |
832 | eip6.val = (*pnt++ << 8); | |
833 | eip6.val |= (*pnt++); | |
834 | ||
4371bf91 PG |
835 | inet_ntop(AF_INET6, &eip6.ip, buf_local, |
836 | sizeof(buf_local)); | |
9a659715 PG |
837 | len = snprintf(buf, bufsz, "%s%s:%u", prefix, |
838 | buf_local, eip6.val); | |
839 | } | |
d62a17ae | 840 | } else if (type == ECOMMUNITY_ENCODE_IP) { |
841 | memcpy(&eip.ip, pnt, 4); | |
842 | pnt += 4; | |
843 | eip.val = (*pnt++ << 8); | |
844 | eip.val |= (*pnt++); | |
845 | ||
23d0a753 DA |
846 | len = snprintfrr(buf, bufsz, "%s%pI4:%u", prefix, &eip.ip, |
847 | eip.val); | |
d62a17ae | 848 | } |
91085f97 QY |
849 | |
850 | /* consume value */ | |
851 | (void)pnt; | |
d62a17ae | 852 | |
853 | return len; | |
c5900768 | 854 | } |
855 | ||
9a659715 PG |
856 | static int ecommunity_rt_soo_str(char *buf, size_t bufsz, const uint8_t *pnt, |
857 | int type, int sub_type, int format) | |
858 | { | |
859 | return ecommunity_rt_soo_str_internal(buf, bufsz, pnt, type, | |
860 | sub_type, format, | |
861 | ECOMMUNITY_SIZE); | |
862 | } | |
863 | ||
8bcaad3d DA |
864 | /* Helper function to convert IEEE-754 Floating Point to uint32 */ |
865 | static uint32_t ieee_float_uint32_to_uint32(uint32_t u) | |
866 | { | |
867 | union { | |
868 | float r; | |
869 | uint32_t d; | |
870 | } f = {.d = u}; | |
871 | ||
872 | return (uint32_t)f.r; | |
873 | } | |
874 | ||
27aa23a4 DA |
875 | static int ecommunity_lb_str(char *buf, size_t bufsz, const uint8_t *pnt, |
876 | bool disable_ieee_floating) | |
7e3ebfd1 | 877 | { |
878 | int len = 0; | |
879 | as_t as; | |
8bcaad3d | 880 | uint32_t bw_tmp, bw; |
7e3ebfd1 | 881 | char bps_buf[20] = {0}; |
882 | ||
883 | #define ONE_GBPS_BYTES (1000 * 1000 * 1000 / 8) | |
884 | #define ONE_MBPS_BYTES (1000 * 1000 / 8) | |
885 | #define ONE_KBPS_BYTES (1000 / 8) | |
886 | ||
887 | as = (*pnt++ << 8); | |
888 | as |= (*pnt++); | |
8bcaad3d DA |
889 | (void)ptr_get_be32(pnt, &bw_tmp); |
890 | ||
27aa23a4 DA |
891 | bw = disable_ieee_floating ? bw_tmp |
892 | : ieee_float_uint32_to_uint32(bw_tmp); | |
8bcaad3d | 893 | |
7e3ebfd1 | 894 | if (bw >= ONE_GBPS_BYTES) |
772270f3 QY |
895 | snprintf(bps_buf, sizeof(bps_buf), "%.3f Gbps", |
896 | (float)(bw / ONE_GBPS_BYTES)); | |
7e3ebfd1 | 897 | else if (bw >= ONE_MBPS_BYTES) |
772270f3 QY |
898 | snprintf(bps_buf, sizeof(bps_buf), "%.3f Mbps", |
899 | (float)(bw / ONE_MBPS_BYTES)); | |
7e3ebfd1 | 900 | else if (bw >= ONE_KBPS_BYTES) |
772270f3 QY |
901 | snprintf(bps_buf, sizeof(bps_buf), "%.3f Kbps", |
902 | (float)(bw / ONE_KBPS_BYTES)); | |
7e3ebfd1 | 903 | else |
772270f3 | 904 | snprintf(bps_buf, sizeof(bps_buf), "%u bps", bw * 8); |
7e3ebfd1 | 905 | |
906 | len = snprintf(buf, bufsz, "LB:%u:%u (%s)", as, bw, bps_buf); | |
907 | return len; | |
908 | } | |
909 | ||
d62a17ae | 910 | /* Convert extended community attribute to string. |
718e3744 | 911 | |
912 | Due to historical reason of industry standard implementation, there | |
913 | are three types of format. | |
914 | ||
915 | route-map set extcommunity format | |
3efd0893 | 916 | "rt 100:1 100:2soo 100:3" |
718e3744 | 917 | |
918 | extcommunity-list | |
3efd0893 | 919 | "rt 100:1 rt 100:2 soo 100:3show [ip] bgp" and extcommunity-list regular expression matching |
d62a17ae | 920 | "RT:100:1 RT:100:2 SoO:100:3" |
718e3744 | 921 | |
922 | For each formath please use below definition for format: | |
923 | ||
924 | ECOMMUNITY_FORMAT_ROUTE_MAP | |
925 | ECOMMUNITY_FORMAT_COMMUNITY_LIST | |
926 | ECOMMUNITY_FORMAT_DISPLAY | |
e82202b7 | 927 | |
d62a17ae | 928 | Filter is added to display only ECOMMUNITY_ROUTE_TARGET in some cases. |
e82202b7 | 929 | 0 value displays all |
718e3744 | 930 | */ |
d62a17ae | 931 | char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter) |
718e3744 | 932 | { |
f6e07e1b | 933 | uint32_t i; |
d7c0a89a | 934 | uint8_t *pnt; |
1ef3c51f PG |
935 | uint8_t type = 0; |
936 | uint8_t sub_type = 0; | |
d62a17ae | 937 | int str_size; |
d62a17ae | 938 | char *str_buf; |
d62a17ae | 939 | |
6a37bfb7 | 940 | if (!ecom || ecom->size == 0) |
91085f97 QY |
941 | return XCALLOC(MTYPE_ECOMMUNITY_STR, 1); |
942 | ||
943 | /* ecom strlen + space + null term */ | |
944 | str_size = (ecom->size * (ECOMMUNITY_STRLEN + 1)) + 1; | |
945 | str_buf = XCALLOC(MTYPE_ECOMMUNITY_STR, str_size); | |
d62a17ae | 946 | |
91085f97 | 947 | char encbuf[128]; |
d62a17ae | 948 | |
949 | for (i = 0; i < ecom->size; i++) { | |
950 | int unk_ecom = 0; | |
91085f97 | 951 | memset(encbuf, 0x00, sizeof(encbuf)); |
d62a17ae | 952 | |
953 | /* Space between each value. */ | |
91085f97 QY |
954 | if (i > 0) |
955 | strlcat(str_buf, " ", str_size); | |
d62a17ae | 956 | |
91085f97 | 957 | /* Retrieve value field */ |
f32f3ae5 | 958 | pnt = ecom->val + (i * ecom->unit_size); |
d62a17ae | 959 | |
91085f97 | 960 | /* High-order octet is the type */ |
d62a17ae | 961 | type = *pnt++; |
962 | ||
963 | if (type == ECOMMUNITY_ENCODE_AS || type == ECOMMUNITY_ENCODE_IP | |
964 | || type == ECOMMUNITY_ENCODE_AS4) { | |
965 | /* Low-order octet of type. */ | |
966 | sub_type = *pnt++; | |
967 | if (sub_type != ECOMMUNITY_ROUTE_TARGET | |
2551b26e PG |
968 | && sub_type != ECOMMUNITY_SITE_ORIGIN) { |
969 | if (sub_type == | |
970 | ECOMMUNITY_FLOWSPEC_REDIRECT_IPV4 && | |
971 | type == ECOMMUNITY_ENCODE_IP) { | |
972 | struct in_addr *ipv4 = | |
973 | (struct in_addr *)pnt; | |
07380148 DA |
974 | snprintfrr(encbuf, sizeof(encbuf), |
975 | "NH:%pI4:%d", ipv4, pnt[5]); | |
7e3ebfd1 | 976 | } else if (sub_type == |
977 | ECOMMUNITY_LINK_BANDWIDTH && | |
978 | type == ECOMMUNITY_ENCODE_AS) { | |
27aa23a4 DA |
979 | ecommunity_lb_str( |
980 | encbuf, sizeof(encbuf), pnt, | |
981 | ecom->disable_ieee_floating); | |
2551b26e PG |
982 | } else |
983 | unk_ecom = 1; | |
91085f97 QY |
984 | } else { |
985 | ecommunity_rt_soo_str(encbuf, sizeof(encbuf), | |
986 | pnt, type, sub_type, | |
987 | format); | |
988 | } | |
d62a17ae | 989 | } else if (type == ECOMMUNITY_ENCODE_OPAQUE) { |
990 | if (filter == ECOMMUNITY_ROUTE_TARGET) | |
991 | continue; | |
992 | if (*pnt == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP) { | |
993 | uint16_t tunneltype; | |
994 | memcpy(&tunneltype, pnt + 5, 2); | |
995 | tunneltype = ntohs(tunneltype); | |
91085f97 QY |
996 | |
997 | snprintf(encbuf, sizeof(encbuf), "ET:%d", | |
998 | tunneltype); | |
996c9314 | 999 | } else if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_DEF_GW) { |
91085f97 QY |
1000 | strlcpy(encbuf, "Default Gateway", |
1001 | sizeof(encbuf)); | |
1002 | } else { | |
d62a17ae | 1003 | unk_ecom = 1; |
91085f97 | 1004 | } |
d62a17ae | 1005 | } else if (type == ECOMMUNITY_ENCODE_EVPN) { |
1006 | if (filter == ECOMMUNITY_ROUTE_TARGET) | |
1007 | continue; | |
bc59a672 MK |
1008 | if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC) { |
1009 | struct ethaddr rmac; | |
d62a17ae | 1010 | pnt++; |
bc59a672 | 1011 | memcpy(&rmac, pnt, ETH_ALEN); |
91085f97 QY |
1012 | |
1013 | snprintf(encbuf, sizeof(encbuf), | |
1014 | "Rmac:%02x:%02x:%02x:%02x:%02x:%02x", | |
1015 | (uint8_t)rmac.octet[0], | |
1016 | (uint8_t)rmac.octet[1], | |
1017 | (uint8_t)rmac.octet[2], | |
1018 | (uint8_t)rmac.octet[3], | |
1019 | (uint8_t)rmac.octet[4], | |
1020 | (uint8_t)rmac.octet[5]); | |
d62a17ae | 1021 | } else if (*pnt |
1022 | == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY) { | |
d7c0a89a QY |
1023 | uint32_t seqnum; |
1024 | uint8_t flags = *++pnt; | |
d62a17ae | 1025 | |
1026 | memcpy(&seqnum, pnt + 2, 4); | |
1027 | seqnum = ntohl(seqnum); | |
91085f97 QY |
1028 | |
1029 | snprintf(encbuf, sizeof(encbuf), "MM:%u", | |
1030 | seqnum); | |
1031 | ||
1032 | if (CHECK_FLAG( | |
1033 | flags, | |
1034 | ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY)) | |
1035 | strlcat(encbuf, ", sticky MAC", | |
1036 | sizeof(encbuf)); | |
5cc359b2 CS |
1037 | } else if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_ND) { |
1038 | uint8_t flags = *++pnt; | |
1039 | ||
91085f97 QY |
1040 | if (CHECK_FLAG( |
1041 | flags, | |
1042 | ECOMMUNITY_EVPN_SUBTYPE_ND_ROUTER_FLAG)) | |
1043 | strlcpy(encbuf, "ND:Router Flag", | |
1044 | sizeof(encbuf)); | |
7904e9fd AK |
1045 | if (CHECK_FLAG( |
1046 | flags, | |
1047 | ECOMMUNITY_EVPN_SUBTYPE_PROXY_FLAG)) | |
1048 | strlcpy(encbuf, "ND:Proxy", | |
1049 | sizeof(encbuf)); | |
4248407b AK |
1050 | } else if (*pnt |
1051 | == ECOMMUNITY_EVPN_SUBTYPE_ES_IMPORT_RT) { | |
1052 | struct ethaddr mac; | |
1053 | ||
1054 | pnt++; | |
1055 | memcpy(&mac, pnt, ETH_ALEN); | |
1056 | snprintf(encbuf, | |
1057 | sizeof(encbuf), | |
1058 | "ES-Import-Rt:%02x:%02x:%02x:%02x:%02x:%02x", | |
1059 | (uint8_t)mac.octet[0], | |
1060 | (uint8_t)mac.octet[1], | |
1061 | (uint8_t)mac.octet[2], | |
1062 | (uint8_t)mac.octet[3], | |
1063 | (uint8_t)mac.octet[4], | |
1064 | (uint8_t)mac.octet[5]); | |
1065 | } else if (*pnt | |
1066 | == ECOMMUNITY_EVPN_SUBTYPE_ESI_LABEL) { | |
1067 | uint8_t flags = *++pnt; | |
1068 | ||
1069 | snprintf(encbuf, | |
1070 | sizeof(encbuf), "ESI-label-Rt:%s", | |
1071 | (flags & | |
1072 | ECOMMUNITY_EVPN_SUBTYPE_ESI_SA_FLAG) ? | |
1073 | "SA":"AA"); | |
74e2bd89 AK |
1074 | } else if (*pnt |
1075 | == ECOMMUNITY_EVPN_SUBTYPE_DF_ELECTION) { | |
1076 | uint8_t alg; | |
1077 | uint16_t pref; | |
1078 | uint16_t bmap; | |
1079 | ||
1080 | alg = *(pnt + 1); | |
1081 | memcpy(&bmap, pnt + 2, 2); | |
1082 | bmap = ntohs(bmap); | |
1083 | memcpy(&pref, pnt + 5, 2); | |
1084 | pref = ntohs(pref); | |
1085 | ||
1086 | if (bmap) | |
1087 | snprintf( | |
1088 | encbuf, sizeof(encbuf), | |
1089 | "DF: (alg: %u, bmap: 0x%x pref: %u)", | |
1090 | alg, bmap, pref); | |
1091 | else | |
1092 | snprintf(encbuf, sizeof(encbuf), | |
1093 | "DF: (alg: %u, pref: %u)", alg, | |
1094 | pref); | |
d62a17ae | 1095 | } else |
1096 | unk_ecom = 1; | |
b72220fc PG |
1097 | } else if (type == ECOMMUNITY_ENCODE_REDIRECT_IP_NH) { |
1098 | sub_type = *pnt++; | |
1099 | if (sub_type == ECOMMUNITY_REDIRECT_IP_NH) { | |
91085f97 QY |
1100 | snprintf(encbuf, sizeof(encbuf), |
1101 | "FS:redirect IP 0x%x", *(pnt + 5)); | |
b72220fc PG |
1102 | } else |
1103 | unk_ecom = 1; | |
1ef3c51f PG |
1104 | } else if (type == ECOMMUNITY_ENCODE_TRANS_EXP || |
1105 | type == ECOMMUNITY_EXTENDED_COMMUNITY_PART_2 || | |
1106 | type == ECOMMUNITY_EXTENDED_COMMUNITY_PART_3) { | |
a8d72b61 | 1107 | sub_type = *pnt++; |
9a659715 PG |
1108 | |
1109 | if (sub_type == ECOMMUNITY_ROUTE_TARGET) { | |
8f242187 | 1110 | char buf[ECOMMUNITY_STRLEN]; |
9a659715 PG |
1111 | |
1112 | memset(buf, 0, sizeof(buf)); | |
1113 | ecommunity_rt_soo_str_internal(buf, sizeof(buf), | |
1114 | (const uint8_t *)pnt, | |
1115 | type & | |
1116 | ~ECOMMUNITY_ENCODE_TRANS_EXP, | |
1117 | ECOMMUNITY_ROUTE_TARGET, | |
1118 | format, | |
1119 | ecom->unit_size); | |
1120 | snprintf(encbuf, sizeof(encbuf), "%s", buf); | |
4371bf91 PG |
1121 | } else if (sub_type == |
1122 | ECOMMUNITY_FLOWSPEC_REDIRECT_IPV6) { | |
9a659715 PG |
1123 | char buf[64]; |
1124 | ||
1125 | memset(buf, 0, sizeof(buf)); | |
1126 | ecommunity_rt_soo_str_internal(buf, sizeof(buf), | |
1127 | (const uint8_t *)pnt, | |
1128 | type & | |
1129 | ~ECOMMUNITY_ENCODE_TRANS_EXP, | |
1130 | ECOMMUNITY_ROUTE_TARGET, | |
1131 | ECOMMUNITY_FORMAT_DISPLAY, | |
1132 | ecom->unit_size); | |
4371bf91 PG |
1133 | snprintf(encbuf, sizeof(encbuf), |
1134 | "FS:redirect VRF %s", buf); | |
9a659715 PG |
1135 | } else if (sub_type == ECOMMUNITY_REDIRECT_VRF) { |
1136 | char buf[16]; | |
1137 | ||
1138 | memset(buf, 0, sizeof(buf)); | |
4371bf91 PG |
1139 | ecommunity_rt_soo_str(buf, sizeof(buf), |
1140 | (const uint8_t *)pnt, | |
1141 | type & | |
1142 | ~ECOMMUNITY_ENCODE_TRANS_EXP, | |
1143 | ECOMMUNITY_ROUTE_TARGET, | |
1144 | ECOMMUNITY_FORMAT_DISPLAY); | |
1145 | snprintf(encbuf, sizeof(encbuf), | |
1146 | "FS:redirect VRF %s", buf); | |
91085f97 QY |
1147 | snprintf(encbuf, sizeof(encbuf), |
1148 | "FS:redirect VRF %s", buf); | |
1ef3c51f PG |
1149 | } else if (type != ECOMMUNITY_ENCODE_TRANS_EXP) |
1150 | unk_ecom = 1; | |
1151 | else if (sub_type == ECOMMUNITY_TRAFFIC_ACTION) { | |
a8d72b61 | 1152 | char action[64]; |
a8d72b61 PG |
1153 | |
1154 | if (*(pnt+3) == | |
1155 | 1 << FLOWSPEC_TRAFFIC_ACTION_TERMINAL) | |
91085f97 QY |
1156 | strlcpy(action, "terminate (apply)", |
1157 | sizeof(action)); | |
a8d72b61 | 1158 | else |
91085f97 QY |
1159 | strlcpy(action, "eval stops", |
1160 | sizeof(action)); | |
1161 | ||
a8d72b61 PG |
1162 | if (*(pnt+3) == |
1163 | 1 << FLOWSPEC_TRAFFIC_ACTION_SAMPLE) | |
91085f97 QY |
1164 | strlcat(action, ", sample", |
1165 | sizeof(action)); | |
1166 | ||
1167 | ||
1168 | snprintf(encbuf, sizeof(encbuf), "FS:action %s", | |
1169 | action); | |
a8d72b61 PG |
1170 | } else if (sub_type == ECOMMUNITY_TRAFFIC_RATE) { |
1171 | union traffic_rate data; | |
1172 | ||
1173 | data.rate_byte[3] = *(pnt+2); | |
1174 | data.rate_byte[2] = *(pnt+3); | |
1175 | data.rate_byte[1] = *(pnt+4); | |
1176 | data.rate_byte[0] = *(pnt+5); | |
91085f97 QY |
1177 | snprintf(encbuf, sizeof(encbuf), "FS:rate %f", |
1178 | data.rate_float); | |
a8d72b61 | 1179 | } else if (sub_type == ECOMMUNITY_TRAFFIC_MARKING) { |
91085f97 QY |
1180 | snprintf(encbuf, sizeof(encbuf), |
1181 | "FS:marking %u", *(pnt + 5)); | |
a8d72b61 PG |
1182 | } else |
1183 | unk_ecom = 1; | |
7e3ebfd1 | 1184 | } else if (type == ECOMMUNITY_ENCODE_AS_NON_TRANS) { |
1185 | sub_type = *pnt++; | |
1186 | if (sub_type == ECOMMUNITY_LINK_BANDWIDTH) | |
27aa23a4 DA |
1187 | ecommunity_lb_str(encbuf, sizeof(encbuf), pnt, |
1188 | ecom->disable_ieee_floating); | |
7e3ebfd1 | 1189 | else |
1190 | unk_ecom = 1; | |
7b27cf7b DA |
1191 | } else if (type == ECOMMUNITY_ENCODE_OPAQUE_NON_TRANS) { |
1192 | sub_type = *pnt++; | |
1193 | if (sub_type == ECOMMUNITY_ORIGIN_VALIDATION_STATE) | |
1194 | ecommunity_origin_validation_state_str( | |
1195 | encbuf, sizeof(encbuf), pnt); | |
1196 | else | |
1197 | unk_ecom = 1; | |
1ef3c51f PG |
1198 | } else { |
1199 | sub_type = *pnt++; | |
d62a17ae | 1200 | unk_ecom = 1; |
1ef3c51f | 1201 | } |
d62a17ae | 1202 | |
1203 | if (unk_ecom) | |
91085f97 QY |
1204 | snprintf(encbuf, sizeof(encbuf), "UNK:%d, %d", type, |
1205 | sub_type); | |
d62a17ae | 1206 | |
91085f97 QY |
1207 | int r = strlcat(str_buf, encbuf, str_size); |
1208 | assert(r < str_size); | |
94431dbc C |
1209 | } |
1210 | ||
d62a17ae | 1211 | return str_buf; |
718e3744 | 1212 | } |
4372df71 | 1213 | |
2d7cdc5b DA |
1214 | bool ecommunity_include(struct ecommunity *e1, struct ecommunity *e2) |
1215 | { | |
1216 | uint32_t i, j; | |
1217 | ||
1218 | if (!e1 || !e2) | |
1219 | return false; | |
1220 | for (i = 0; i < e1->size; ++i) { | |
1221 | for (j = 0; j < e2->size; ++j) { | |
1222 | if (!memcmp(e1->val + (i * e1->unit_size), | |
1223 | e2->val + (j * e2->unit_size), | |
1224 | e1->unit_size)) | |
1225 | return true; | |
1226 | } | |
1227 | } | |
1228 | return false; | |
1229 | } | |
1230 | ||
3dc339cd DA |
1231 | bool ecommunity_match(const struct ecommunity *ecom1, |
1232 | const struct ecommunity *ecom2) | |
4372df71 | 1233 | { |
f6e07e1b DS |
1234 | uint32_t i = 0; |
1235 | uint32_t j = 0; | |
d62a17ae | 1236 | |
1237 | if (ecom1 == NULL && ecom2 == NULL) | |
3dc339cd | 1238 | return true; |
d62a17ae | 1239 | |
1240 | if (ecom1 == NULL || ecom2 == NULL) | |
3dc339cd | 1241 | return false; |
d62a17ae | 1242 | |
1243 | if (ecom1->size < ecom2->size) | |
3dc339cd | 1244 | return false; |
d62a17ae | 1245 | |
1246 | /* Every community on com2 needs to be on com1 for this to match */ | |
1247 | while (i < ecom1->size && j < ecom2->size) { | |
9a659715 PG |
1248 | if (memcmp(ecom1->val + i * ecom1->unit_size, |
1249 | ecom2->val + j * ecom2->unit_size, | |
1250 | ecom2->unit_size) | |
d62a17ae | 1251 | == 0) |
1252 | j++; | |
1253 | i++; | |
1254 | } | |
1255 | ||
1256 | if (j == ecom2->size) | |
3dc339cd | 1257 | return true; |
d62a17ae | 1258 | else |
3dc339cd | 1259 | return false; |
4372df71 | 1260 | } |
1e27ef50 PG |
1261 | |
1262 | /* return first occurence of type */ | |
d62a17ae | 1263 | extern struct ecommunity_val *ecommunity_lookup(const struct ecommunity *ecom, |
1264 | uint8_t type, uint8_t subtype) | |
1e27ef50 | 1265 | { |
d7c0a89a | 1266 | uint8_t *p; |
f6e07e1b | 1267 | uint32_t c; |
d62a17ae | 1268 | |
1269 | /* If the value already exists in the structure return 0. */ | |
1270 | c = 0; | |
9a659715 | 1271 | for (p = ecom->val; c < ecom->size; p += ecom->unit_size, c++) { |
d62a17ae | 1272 | if (p == NULL) { |
1273 | continue; | |
1274 | } | |
1275 | if (p[0] == type && p[1] == subtype) | |
1276 | return (struct ecommunity_val *)p; | |
1277 | } | |
1278 | return NULL; | |
1e27ef50 PG |
1279 | } |
1280 | ||
1281 | /* remove ext. community matching type and subtype | |
1282 | * return 1 on success ( removed ), 0 otherwise (not present) | |
1283 | */ | |
1207a5bc | 1284 | bool ecommunity_strip(struct ecommunity *ecom, uint8_t type, |
1285 | uint8_t subtype) | |
1e27ef50 | 1286 | { |
003bc275 | 1287 | uint8_t *p, *q, *new; |
f6e07e1b | 1288 | uint32_t c, found = 0; |
d62a17ae | 1289 | /* When this is fist value, just add it. */ |
3dc339cd DA |
1290 | if (ecom == NULL || ecom->val == NULL) |
1291 | return false; | |
d62a17ae | 1292 | |
003bc275 | 1293 | /* Check if any existing ext community matches. */ |
1294 | /* Certain extended communities like the Route Target can be present | |
1295 | * multiple times, handle that. | |
1296 | */ | |
d62a17ae | 1297 | c = 0; |
9a659715 | 1298 | for (p = ecom->val; c < ecom->size; p += ecom->unit_size, c++) { |
003bc275 | 1299 | if (p[0] == type && p[1] == subtype) |
1300 | found++; | |
d62a17ae | 1301 | } |
003bc275 | 1302 | /* If no matching ext community exists, return. */ |
d62a17ae | 1303 | if (found == 0) |
3dc339cd | 1304 | return false; |
003bc275 | 1305 | |
1306 | /* Handle the case where everything needs to be stripped. */ | |
1307 | if (found == ecom->size) { | |
1308 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
1309 | ecom->size = 0; | |
3dc339cd | 1310 | return true; |
003bc275 | 1311 | } |
1312 | ||
1313 | /* Strip matching ext community(ies). */ | |
1314 | new = XMALLOC(MTYPE_ECOMMUNITY_VAL, | |
9a659715 | 1315 | (ecom->size - found) * ecom->unit_size); |
003bc275 | 1316 | q = new; |
9a659715 | 1317 | for (c = 0, p = ecom->val; c < ecom->size; c++, p += ecom->unit_size) { |
003bc275 | 1318 | if (!(p[0] == type && p[1] == subtype)) { |
9a659715 PG |
1319 | memcpy(q, p, ecom->unit_size); |
1320 | q += ecom->unit_size; | |
003bc275 | 1321 | } |
1322 | } | |
1323 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
1324 | ecom->val = new; | |
1325 | ecom->size -= found; | |
3dc339cd | 1326 | return true; |
1e27ef50 | 1327 | } |
44338987 | 1328 | |
1329 | /* | |
1330 | * Remove specified extended community value from extended community. | |
1331 | * Returns 1 if value was present (and hence, removed), 0 otherwise. | |
1332 | */ | |
3dc339cd | 1333 | bool ecommunity_del_val(struct ecommunity *ecom, struct ecommunity_val *eval) |
44338987 | 1334 | { |
f27f864e | 1335 | uint8_t *p; |
f6e07e1b | 1336 | uint32_t c, found = 0; |
44338987 | 1337 | |
1338 | /* Make sure specified value exists. */ | |
1339 | if (ecom == NULL || ecom->val == NULL) | |
3dc339cd | 1340 | return false; |
44338987 | 1341 | c = 0; |
9a659715 PG |
1342 | for (p = ecom->val; c < ecom->size; p += ecom->unit_size, c++) { |
1343 | if (!memcmp(p, eval->val, ecom->unit_size)) { | |
44338987 | 1344 | found = 1; |
1345 | break; | |
1346 | } | |
1347 | } | |
1348 | if (found == 0) | |
3dc339cd | 1349 | return false; |
44338987 | 1350 | |
1351 | /* Delete the selected value */ | |
1352 | ecom->size--; | |
de7cee09 AR |
1353 | if (ecom->size) { |
1354 | p = XMALLOC(MTYPE_ECOMMUNITY_VAL, ecom->size * ecom->unit_size); | |
1355 | if (c != 0) | |
1356 | memcpy(p, ecom->val, c * ecom->unit_size); | |
1357 | if ((ecom->size - c) != 0) | |
1358 | memcpy(p + (c)*ecom->unit_size, | |
1359 | ecom->val + (c + 1) * ecom->unit_size, | |
1360 | (ecom->size - c) * ecom->unit_size); | |
1361 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
1362 | ecom->val = p; | |
1363 | } else | |
92d53761 | 1364 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); |
de7cee09 | 1365 | |
3dc339cd | 1366 | return true; |
44338987 | 1367 | } |
dacf6ec1 PG |
1368 | |
1369 | int ecommunity_fill_pbr_action(struct ecommunity_val *ecom_eval, | |
f01e580f PG |
1370 | struct bgp_pbr_entry_action *api, |
1371 | afi_t afi) | |
dacf6ec1 PG |
1372 | { |
1373 | if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_RATE) { | |
1374 | api->action = ACTION_TRAFFICRATE; | |
1375 | api->u.r.rate_info[3] = ecom_eval->val[4]; | |
1376 | api->u.r.rate_info[2] = ecom_eval->val[5]; | |
1377 | api->u.r.rate_info[1] = ecom_eval->val[6]; | |
1378 | api->u.r.rate_info[0] = ecom_eval->val[7]; | |
1379 | } else if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_ACTION) { | |
1380 | api->action = ACTION_TRAFFIC_ACTION; | |
1381 | /* else distribute code is set by default */ | |
1382 | if (ecom_eval->val[5] & (1 << FLOWSPEC_TRAFFIC_ACTION_TERMINAL)) | |
1383 | api->u.za.filter |= TRAFFIC_ACTION_TERMINATE; | |
1384 | else | |
1385 | api->u.za.filter |= TRAFFIC_ACTION_DISTRIBUTE; | |
1386 | if (ecom_eval->val[5] == 1 << FLOWSPEC_TRAFFIC_ACTION_SAMPLE) | |
1387 | api->u.za.filter |= TRAFFIC_ACTION_SAMPLE; | |
1388 | ||
1389 | } else if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_MARKING) { | |
1390 | api->action = ACTION_MARKING; | |
1391 | api->u.marking_dscp = ecom_eval->val[7]; | |
1392 | } else if (ecom_eval->val[1] == ECOMMUNITY_REDIRECT_VRF) { | |
1393 | /* must use external function */ | |
1394 | return 0; | |
f01e580f PG |
1395 | } else if (ecom_eval->val[1] == ECOMMUNITY_REDIRECT_IP_NH && |
1396 | afi == AFI_IP) { | |
dacf6ec1 PG |
1397 | /* see draft-ietf-idr-flowspec-redirect-ip-02 |
1398 | * Q1: how come a ext. community can host ipv6 address | |
1399 | * Q2 : from cisco documentation: | |
1400 | * Announces the reachability of one or more flowspec NLRI. | |
1401 | * When a BGP speaker receives an UPDATE message with the | |
1402 | * redirect-to-IP extended community, it is expected to | |
1403 | * create a traffic filtering rule for every flow-spec | |
1404 | * NLRI in the message that has this path as its best | |
1405 | * path. The filter entry matches the IP packets | |
1406 | * described in the NLRI field and redirects them or | |
1407 | * copies them towards the IPv4 or IPv6 address specified | |
1408 | * in the 'Network Address of Next- Hop' | |
1409 | * field of the associated MP_REACH_NLRI. | |
1410 | */ | |
1411 | struct ecommunity_ip *ip_ecom = (struct ecommunity_ip *) | |
1412 | ecom_eval + 2; | |
1413 | ||
1414 | api->u.zr.redirect_ip_v4 = ip_ecom->ip; | |
1415 | } else | |
1416 | return -1; | |
1417 | return 0; | |
1418 | } | |
5b820d9e NT |
1419 | |
1420 | static struct ecommunity *bgp_aggr_ecommunity_lookup( | |
1421 | struct bgp_aggregate *aggregate, | |
1422 | struct ecommunity *ecommunity) | |
1423 | { | |
1424 | return hash_lookup(aggregate->ecommunity_hash, ecommunity); | |
1425 | } | |
1426 | ||
1427 | static void *bgp_aggr_ecommunty_hash_alloc(void *p) | |
1428 | { | |
1429 | struct ecommunity *ref = (struct ecommunity *)p; | |
1430 | struct ecommunity *ecommunity = NULL; | |
1431 | ||
1432 | ecommunity = ecommunity_dup(ref); | |
1433 | return ecommunity; | |
1434 | } | |
1435 | ||
7f5818fb | 1436 | static void bgp_aggr_ecommunity_prepare(struct hash_bucket *hb, void *arg) |
5b820d9e | 1437 | { |
5b820d9e NT |
1438 | struct ecommunity *hb_ecommunity = hb->data; |
1439 | struct ecommunity **aggr_ecommunity = arg; | |
1440 | ||
4edd83f9 | 1441 | if (*aggr_ecommunity) |
1442 | *aggr_ecommunity = ecommunity_merge(*aggr_ecommunity, | |
1443 | hb_ecommunity); | |
1444 | else | |
5b820d9e NT |
1445 | *aggr_ecommunity = ecommunity_dup(hb_ecommunity); |
1446 | } | |
1447 | ||
1448 | void bgp_aggr_ecommunity_remove(void *arg) | |
1449 | { | |
1450 | struct ecommunity *ecommunity = arg; | |
1451 | ||
1452 | ecommunity_free(&ecommunity); | |
1453 | } | |
1454 | ||
1455 | void bgp_compute_aggregate_ecommunity(struct bgp_aggregate *aggregate, | |
1456 | struct ecommunity *ecommunity) | |
4edd83f9 | 1457 | { |
1458 | bgp_compute_aggregate_ecommunity_hash(aggregate, ecommunity); | |
1459 | bgp_compute_aggregate_ecommunity_val(aggregate); | |
1460 | } | |
1461 | ||
1462 | ||
1463 | void bgp_compute_aggregate_ecommunity_hash(struct bgp_aggregate *aggregate, | |
1464 | struct ecommunity *ecommunity) | |
5b820d9e NT |
1465 | { |
1466 | struct ecommunity *aggr_ecommunity = NULL; | |
1467 | ||
1468 | if ((aggregate == NULL) || (ecommunity == NULL)) | |
1469 | return; | |
1470 | ||
1471 | /* Create hash if not already created. | |
1472 | */ | |
1473 | if (aggregate->ecommunity_hash == NULL) | |
1474 | aggregate->ecommunity_hash = hash_create( | |
1475 | ecommunity_hash_make, ecommunity_cmp, | |
1476 | "BGP Aggregator ecommunity hash"); | |
1477 | ||
1478 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1479 | if (aggr_ecommunity == NULL) { | |
1480 | /* Insert ecommunity into hash. | |
1481 | */ | |
1482 | aggr_ecommunity = hash_get(aggregate->ecommunity_hash, | |
1483 | ecommunity, | |
1484 | bgp_aggr_ecommunty_hash_alloc); | |
4edd83f9 | 1485 | } |
5b820d9e | 1486 | |
4edd83f9 | 1487 | /* Increment reference counter. |
1488 | */ | |
1489 | aggr_ecommunity->refcnt++; | |
1490 | } | |
5b820d9e | 1491 | |
4edd83f9 | 1492 | void bgp_compute_aggregate_ecommunity_val(struct bgp_aggregate *aggregate) |
1493 | { | |
1494 | struct ecommunity *ecommerge = NULL; | |
1495 | ||
1496 | if (aggregate == NULL) | |
1497 | return; | |
1498 | ||
1499 | /* Re-compute aggregate's ecommunity. | |
1500 | */ | |
1501 | if (aggregate->ecommunity) | |
1502 | ecommunity_free(&aggregate->ecommunity); | |
1503 | if (aggregate->ecommunity_hash | |
1504 | && aggregate->ecommunity_hash->count) { | |
5b820d9e NT |
1505 | hash_iterate(aggregate->ecommunity_hash, |
1506 | bgp_aggr_ecommunity_prepare, | |
1507 | &aggregate->ecommunity); | |
4edd83f9 | 1508 | ecommerge = aggregate->ecommunity; |
1509 | aggregate->ecommunity = ecommunity_uniq_sort(ecommerge); | |
1510 | if (ecommerge) | |
1511 | ecommunity_free(&ecommerge); | |
5b820d9e | 1512 | } |
5b820d9e NT |
1513 | } |
1514 | ||
1515 | void bgp_remove_ecommunity_from_aggregate(struct bgp_aggregate *aggregate, | |
1516 | struct ecommunity *ecommunity) | |
1517 | { | |
1518 | struct ecommunity *aggr_ecommunity = NULL; | |
1519 | struct ecommunity *ret_ecomm = NULL; | |
1520 | ||
4edd83f9 | 1521 | if ((!aggregate) |
1522 | || (!aggregate->ecommunity_hash) | |
1523 | || (!ecommunity)) | |
5b820d9e NT |
1524 | return; |
1525 | ||
1526 | /* Look-up the ecommunity in the hash. | |
1527 | */ | |
1528 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1529 | if (aggr_ecommunity) { | |
1530 | aggr_ecommunity->refcnt--; | |
1531 | ||
1532 | if (aggr_ecommunity->refcnt == 0) { | |
1533 | ret_ecomm = hash_release(aggregate->ecommunity_hash, | |
1534 | aggr_ecommunity); | |
1535 | ecommunity_free(&ret_ecomm); | |
4edd83f9 | 1536 | bgp_compute_aggregate_ecommunity_val(aggregate); |
1537 | } | |
1538 | } | |
1539 | } | |
1540 | ||
1541 | void bgp_remove_ecomm_from_aggregate_hash(struct bgp_aggregate *aggregate, | |
1542 | struct ecommunity *ecommunity) | |
1543 | { | |
1544 | ||
1545 | struct ecommunity *aggr_ecommunity = NULL; | |
1546 | struct ecommunity *ret_ecomm = NULL; | |
5b820d9e | 1547 | |
4edd83f9 | 1548 | if ((!aggregate) |
1549 | || (!aggregate->ecommunity_hash) | |
1550 | || (!ecommunity)) | |
1551 | return; | |
5b820d9e | 1552 | |
4edd83f9 | 1553 | /* Look-up the ecommunity in the hash. |
1554 | */ | |
1555 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1556 | if (aggr_ecommunity) { | |
1557 | aggr_ecommunity->refcnt--; | |
1558 | ||
1559 | if (aggr_ecommunity->refcnt == 0) { | |
1560 | ret_ecomm = hash_release(aggregate->ecommunity_hash, | |
1561 | aggr_ecommunity); | |
1562 | ecommunity_free(&ret_ecomm); | |
5b820d9e NT |
1563 | } |
1564 | } | |
1565 | } | |
d901dc13 | 1566 | |
7b27cf7b DA |
1567 | struct ecommunity * |
1568 | ecommunity_add_origin_validation_state(enum rpki_states rpki_state, | |
1569 | struct ecommunity *old) | |
1570 | { | |
1571 | struct ecommunity *new = NULL; | |
1572 | struct ecommunity ovs_ecomm = {0}; | |
1573 | struct ecommunity_val ovs_eval; | |
1574 | ||
1575 | encode_origin_validation_state(rpki_state, &ovs_eval); | |
1576 | ||
1577 | if (old) { | |
1578 | new = ecommunity_dup(old); | |
1579 | ecommunity_add_val(new, &ovs_eval, true, true); | |
1580 | if (!old->refcnt) | |
1581 | ecommunity_free(&old); | |
1582 | } else { | |
1583 | ovs_ecomm.size = 1; | |
1584 | ovs_ecomm.unit_size = ECOMMUNITY_SIZE; | |
1585 | ovs_ecomm.val = (uint8_t *)&ovs_eval.val; | |
1586 | new = ecommunity_dup(&ovs_ecomm); | |
1587 | } | |
1588 | ||
1589 | return new; | |
1590 | } | |
1591 | ||
d901dc13 | 1592 | /* |
1593 | * return the BGP link bandwidth extended community, if present; | |
1594 | * the actual bandwidth is returned via param | |
1595 | */ | |
1596 | const uint8_t *ecommunity_linkbw_present(struct ecommunity *ecom, uint32_t *bw) | |
1597 | { | |
1598 | const uint8_t *eval; | |
f6e07e1b | 1599 | uint32_t i; |
d901dc13 | 1600 | |
1601 | if (bw) | |
1602 | *bw = 0; | |
1603 | ||
1604 | if (!ecom || !ecom->size) | |
1605 | return NULL; | |
1606 | ||
1607 | for (i = 0; i < ecom->size; i++) { | |
1608 | const uint8_t *pnt; | |
1609 | uint8_t type, sub_type; | |
1610 | uint32_t bwval; | |
1611 | ||
1612 | eval = pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
1613 | type = *pnt++; | |
1614 | sub_type = *pnt++; | |
1615 | ||
1616 | if ((type == ECOMMUNITY_ENCODE_AS || | |
1617 | type == ECOMMUNITY_ENCODE_AS_NON_TRANS) && | |
1618 | sub_type == ECOMMUNITY_LINK_BANDWIDTH) { | |
1619 | pnt += 2; /* bandwidth is encoded as AS:val */ | |
1620 | pnt = ptr_get_be32(pnt, &bwval); | |
1621 | (void)pnt; /* consume value */ | |
1622 | if (bw) | |
27aa23a4 DA |
1623 | *bw = ecom->disable_ieee_floating |
1624 | ? bwval | |
1625 | : ieee_float_uint32_to_uint32( | |
1626 | bwval); | |
d901dc13 | 1627 | return eval; |
1628 | } | |
1629 | } | |
1630 | ||
1631 | return NULL; | |
1632 | } | |
7b651a32 | 1633 | |
1634 | ||
27aa23a4 DA |
1635 | struct ecommunity *ecommunity_replace_linkbw(as_t as, struct ecommunity *ecom, |
1636 | uint64_t cum_bw, | |
1637 | bool disable_ieee_floating) | |
7b651a32 | 1638 | { |
1639 | struct ecommunity *new; | |
1640 | struct ecommunity_val lb_eval; | |
1641 | const uint8_t *eval; | |
1642 | uint8_t type; | |
1643 | uint32_t cur_bw; | |
1644 | ||
1645 | /* Nothing to replace if link-bandwidth doesn't exist or | |
1646 | * is non-transitive - just return existing extcommunity. | |
1647 | */ | |
1648 | new = ecom; | |
1649 | if (!ecom || !ecom->size) | |
1650 | return new; | |
1651 | ||
1652 | eval = ecommunity_linkbw_present(ecom, &cur_bw); | |
1653 | if (!eval) | |
1654 | return new; | |
1655 | ||
1656 | type = *eval; | |
1657 | if (type & ECOMMUNITY_FLAG_NON_TRANSITIVE) | |
1658 | return new; | |
1659 | ||
1660 | /* Transitive link-bandwidth exists, replace with the passed | |
1661 | * (cumulative) bandwidth value. We need to create a new | |
1662 | * extcommunity for this - refer to AS-Path replace function | |
1663 | * for reference. | |
1664 | */ | |
1665 | if (cum_bw > 0xFFFFFFFF) | |
1666 | cum_bw = 0xFFFFFFFF; | |
27aa23a4 DA |
1667 | encode_lb_extcomm(as > BGP_AS_MAX ? BGP_AS_TRANS : as, cum_bw, false, |
1668 | &lb_eval, disable_ieee_floating); | |
7b651a32 | 1669 | new = ecommunity_dup(ecom); |
1670 | ecommunity_add_val(new, &lb_eval, true, true); | |
1671 | ||
1672 | return new; | |
1673 | } |