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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; |
b571d79d TA |
506 | uint64_t tmp_as = 0; |
507 | ||
d62a17ae | 508 | /* Skip white space. */ |
fefa5e0f | 509 | while (isspace((unsigned char)*p)) { |
d62a17ae | 510 | p++; |
511 | str++; | |
718e3744 | 512 | } |
d62a17ae | 513 | |
514 | /* Check the end of the line. */ | |
515 | if (*p == '\0') | |
516 | return NULL; | |
517 | ||
518 | /* "rt" and "soo" keyword parse. */ | |
fefa5e0f | 519 | if (!isdigit((unsigned char)*p)) { |
d62a17ae | 520 | /* "rt" match check. */ |
fefa5e0f | 521 | if (tolower((unsigned char)*p) == 'r') { |
d62a17ae | 522 | p++; |
fefa5e0f | 523 | if (tolower((unsigned char)*p) == 't') { |
d62a17ae | 524 | p++; |
9a659715 PG |
525 | if (*p != '\0' && tolower((int)*p) == '6') |
526 | *token = ecommunity_token_rt6; | |
527 | else | |
528 | *token = ecommunity_token_rt; | |
d62a17ae | 529 | return p; |
530 | } | |
fefa5e0f | 531 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 532 | *token = ecommunity_token_rt; |
533 | return p; | |
534 | } | |
535 | goto error; | |
718e3744 | 536 | } |
d62a17ae | 537 | /* "soo" match check. */ |
fefa5e0f | 538 | else if (tolower((unsigned char)*p) == 's') { |
d62a17ae | 539 | p++; |
fefa5e0f | 540 | if (tolower((unsigned char)*p) == 'o') { |
d62a17ae | 541 | p++; |
fefa5e0f | 542 | if (tolower((unsigned char)*p) == 'o') { |
d62a17ae | 543 | p++; |
544 | *token = ecommunity_token_soo; | |
545 | return p; | |
546 | } | |
fefa5e0f | 547 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 548 | *token = ecommunity_token_soo; |
549 | return p; | |
550 | } | |
551 | goto error; | |
552 | } | |
fefa5e0f | 553 | if (isspace((unsigned char)*p) || *p == '\0') { |
d62a17ae | 554 | *token = ecommunity_token_soo; |
555 | return p; | |
556 | } | |
557 | goto error; | |
718e3744 | 558 | } |
d62a17ae | 559 | goto error; |
718e3744 | 560 | } |
d62a17ae | 561 | |
562 | /* What a mess, there are several possibilities: | |
563 | * | |
564 | * a) A.B.C.D:MN | |
565 | * b) EF:OPQR | |
566 | * c) GHJK:MN | |
9a659715 | 567 | * d) <IPV6>:MN (only with rt6) |
d62a17ae | 568 | * |
569 | * A.B.C.D: Four Byte IP | |
570 | * EF: Two byte ASN | |
571 | * GHJK: Four-byte ASN | |
572 | * MN: Two byte value | |
573 | * OPQR: Four byte value | |
574 | * | |
575 | */ | |
9a659715 PG |
576 | /* IPv6 case : look for last ':' */ |
577 | if (*token == ecommunity_token_rt6 || | |
578 | *token == ecommunity_token_val6) { | |
579 | char *limit; | |
580 | ||
581 | limit = endptr = strrchr(p, ':'); | |
582 | if (!endptr) | |
583 | goto error; | |
8f242187 | 584 | |
9a659715 | 585 | endptr++; |
b571d79d TA |
586 | errno = 0; |
587 | tmp_as = strtoul(endptr, &endptr, 10); | |
588 | /* 'unsigned long' is a uint64 on 64-bit | |
589 | * systems, and uint32 on 32-bit systems. So for | |
590 | * 64-bit we can just directly check the value | |
591 | * against BGP_AS4_MAX/UINT32_MAX, and for | |
592 | * 32-bit we can check for errno (set to ERANGE | |
593 | * upon overflow). | |
594 | */ | |
595 | if (*endptr != '\0' || tmp_as == BGP_AS4_MAX || errno) | |
9a659715 | 596 | goto error; |
b571d79d | 597 | as = (as_t)tmp_as; |
8f242187 | 598 | |
9a659715 PG |
599 | memcpy(buf, p, (limit - p)); |
600 | buf[limit - p] = '\0'; | |
601 | ret = inet_pton(AF_INET6, buf, &ip6); | |
602 | if (ret == 0) | |
603 | goto error; | |
8f242187 | 604 | |
9a659715 PG |
605 | ecomm_type = ECOMMUNITY_ENCODE_TRANS_EXP; |
606 | if (ecommunity_encode_internal(ecomm_type, | |
8f242187 PG |
607 | ECOMMUNITY_FLOWSPEC_REDIRECT_IPV6, |
608 | 1, 0, NULL, &ip6, as, eval_ptr)) | |
9a659715 | 609 | goto error; |
8f242187 | 610 | |
9a659715 PG |
611 | *token = ecommunity_token_val6; |
612 | while (isdigit((int)*p) || *p == ':' || *p == '.') { | |
613 | p++; | |
614 | } | |
615 | return p; | |
616 | } | |
fefa5e0f | 617 | while (isdigit((unsigned char)*p) || *p == ':' || *p == '.') { |
d62a17ae | 618 | if (*p == ':') { |
619 | if (separator) | |
620 | goto error; | |
621 | ||
622 | separator = 1; | |
623 | digit = 0; | |
624 | ||
625 | if ((p - str) > INET_ADDRSTRLEN) | |
626 | goto error; | |
627 | memset(buf, 0, INET_ADDRSTRLEN + 1); | |
628 | memcpy(buf, str, p - str); | |
629 | ||
630 | if (dot) { | |
631 | /* Parsing A.B.C.D in: | |
632 | * A.B.C.D:MN | |
633 | */ | |
634 | ret = inet_aton(buf, &ip); | |
635 | if (ret == 0) | |
636 | goto error; | |
637 | } else { | |
638 | /* ASN */ | |
b571d79d TA |
639 | errno = 0; |
640 | tmp_as = strtoul(buf, &endptr, 10); | |
641 | /* 'unsigned long' is a uint64 on 64-bit | |
642 | * systems, and uint32 on 32-bit systems. So for | |
643 | * 64-bit we can just directly check the value | |
644 | * against BGP_AS4_MAX/UINT32_MAX, and for | |
645 | * 32-bit we can check for errno (set to ERANGE | |
646 | * upon overflow). | |
647 | */ | |
648 | if (*endptr != '\0' || tmp_as > BGP_AS4_MAX || | |
649 | errno) | |
d62a17ae | 650 | goto error; |
b571d79d | 651 | as = (as_t)tmp_as; |
d62a17ae | 652 | } |
653 | } else if (*p == '.') { | |
654 | if (separator) | |
655 | goto error; | |
656 | dot++; | |
657 | if (dot > 4) | |
658 | goto error; | |
659 | } else { | |
660 | digit = 1; | |
661 | ||
662 | /* We're past the IP/ASN part */ | |
663 | if (separator) { | |
664 | val *= 10; | |
665 | val += (*p - '0'); | |
666 | } | |
667 | } | |
668 | p++; | |
718e3744 | 669 | } |
d62a17ae | 670 | |
671 | /* Low digit part must be there. */ | |
672 | if (!digit || !separator) | |
673 | goto error; | |
674 | ||
675 | /* Encode result into extended community. */ | |
676 | if (dot) | |
677 | ecomm_type = ECOMMUNITY_ENCODE_IP; | |
678 | else if (as > BGP_AS_MAX) | |
679 | ecomm_type = ECOMMUNITY_ENCODE_AS4; | |
680 | else | |
681 | ecomm_type = ECOMMUNITY_ENCODE_AS; | |
682 | if (ecommunity_encode(ecomm_type, 0, 1, as, ip, val, eval)) | |
683 | goto error; | |
684 | *token = ecommunity_token_val; | |
685 | return p; | |
686 | ||
687 | error: | |
688 | *token = ecommunity_token_unknown; | |
689 | return p; | |
718e3744 | 690 | } |
691 | ||
9a659715 PG |
692 | static struct ecommunity *ecommunity_str2com_internal(const char *str, int type, |
693 | int keyword_included, | |
694 | bool is_ipv6_extcomm) | |
718e3744 | 695 | { |
d62a17ae | 696 | struct ecommunity *ecom = NULL; |
697 | enum ecommunity_token token = ecommunity_token_unknown; | |
9a659715 | 698 | struct ecommunity_val_ipv6 eval; |
d62a17ae | 699 | int keyword = 0; |
700 | ||
9a659715 PG |
701 | if (is_ipv6_extcomm) |
702 | token = ecommunity_token_rt6; | |
703 | while ((str = ecommunity_gettoken(str, (void *)&eval, &token))) { | |
d62a17ae | 704 | switch (token) { |
705 | case ecommunity_token_rt: | |
125ef88d | 706 | case ecommunity_token_rt6: |
d62a17ae | 707 | case ecommunity_token_soo: |
708 | if (!keyword_included || keyword) { | |
709 | if (ecom) | |
710 | ecommunity_free(&ecom); | |
711 | return NULL; | |
712 | } | |
713 | keyword = 1; | |
714 | ||
9a659715 PG |
715 | if (token == ecommunity_token_rt || |
716 | token == ecommunity_token_rt6) { | |
d62a17ae | 717 | type = ECOMMUNITY_ROUTE_TARGET; |
718 | } | |
719 | if (token == ecommunity_token_soo) { | |
720 | type = ECOMMUNITY_SITE_ORIGIN; | |
721 | } | |
722 | break; | |
723 | case ecommunity_token_val: | |
724 | if (keyword_included) { | |
725 | if (!keyword) { | |
8f242187 | 726 | ecommunity_free(&ecom); |
d62a17ae | 727 | return NULL; |
728 | } | |
729 | keyword = 0; | |
730 | } | |
731 | if (ecom == NULL) | |
732 | ecom = ecommunity_new(); | |
733 | eval.val[1] = type; | |
4371bf91 PG |
734 | ecommunity_add_val_internal(ecom, (void *)&eval, |
735 | false, false, | |
9a659715 PG |
736 | ecom->unit_size); |
737 | break; | |
738 | case ecommunity_token_val6: | |
739 | if (keyword_included) { | |
740 | if (!keyword) { | |
8f242187 | 741 | ecommunity_free(&ecom); |
9a659715 PG |
742 | return NULL; |
743 | } | |
744 | keyword = 0; | |
745 | } | |
746 | if (ecom == NULL) | |
747 | ecom = ecommunity_new(); | |
748 | ecom->unit_size = IPV6_ECOMMUNITY_SIZE; | |
749 | eval.val[1] = type; | |
750 | ecommunity_add_val_internal(ecom, (void *)&eval, false, false, | |
751 | ecom->unit_size); | |
d62a17ae | 752 | break; |
753 | case ecommunity_token_unknown: | |
d62a17ae | 754 | if (ecom) |
755 | ecommunity_free(&ecom); | |
756 | return NULL; | |
718e3744 | 757 | } |
718e3744 | 758 | } |
d62a17ae | 759 | return ecom; |
718e3744 | 760 | } |
761 | ||
9a659715 | 762 | /* Convert string to extended community attribute. |
4371bf91 PG |
763 | * |
764 | * When type is already known, please specify both str and type. str | |
765 | * should not include keyword such as "rt" and "soo". Type is | |
766 | * ECOMMUNITY_ROUTE_TARGET or ECOMMUNITY_SITE_ORIGIN. | |
767 | * keyword_included should be zero. | |
768 | * | |
769 | * For example route-map's "set extcommunity" command case: | |
770 | * | |
771 | * "rt 100:1 100:2 100:3" -> str = "100:1 100:2 100:3" | |
772 | * type = ECOMMUNITY_ROUTE_TARGET | |
773 | * keyword_included = 0 | |
774 | * | |
775 | * "soo 100:1" -> str = "100:1" | |
776 | * type = ECOMMUNITY_SITE_ORIGIN | |
777 | * keyword_included = 0 | |
778 | * | |
779 | * When string includes keyword for each extended community value. | |
780 | * Please specify keyword_included as non-zero value. | |
781 | * | |
782 | * For example standard extcommunity-list case: | |
783 | * | |
784 | * "rt 100:1 rt 100:2 soo 100:1" -> str = "rt 100:1 rt 100:2 soo 100:1" | |
785 | * type = 0 | |
786 | * keyword_include = 1 | |
787 | */ | |
9a659715 PG |
788 | struct ecommunity *ecommunity_str2com(const char *str, int type, |
789 | int keyword_included) | |
790 | { | |
791 | return ecommunity_str2com_internal(str, type, | |
792 | keyword_included, false); | |
793 | } | |
794 | ||
795 | struct ecommunity *ecommunity_str2com_ipv6(const char *str, int type, | |
796 | int keyword_included) | |
797 | { | |
798 | return ecommunity_str2com_internal(str, type, | |
799 | keyword_included, true); | |
800 | } | |
801 | ||
802 | static int ecommunity_rt_soo_str_internal(char *buf, size_t bufsz, | |
803 | const uint8_t *pnt, int type, | |
804 | int sub_type, int format, | |
805 | unsigned short ecom_size) | |
c5900768 | 806 | { |
d62a17ae | 807 | int len = 0; |
808 | const char *prefix; | |
9a659715 | 809 | char buf_local[INET6_ADDRSTRLEN]; |
d62a17ae | 810 | |
811 | /* For parse Extended Community attribute tupple. */ | |
5a0ccebf QY |
812 | struct ecommunity_as eas; |
813 | struct ecommunity_ip eip; | |
9a659715 | 814 | struct ecommunity_ip6 eip6; |
d62a17ae | 815 | |
816 | /* Determine prefix for string, if any. */ | |
817 | switch (format) { | |
818 | case ECOMMUNITY_FORMAT_COMMUNITY_LIST: | |
819 | prefix = (sub_type == ECOMMUNITY_ROUTE_TARGET ? "rt " : "soo "); | |
820 | break; | |
821 | case ECOMMUNITY_FORMAT_DISPLAY: | |
822 | prefix = (sub_type == ECOMMUNITY_ROUTE_TARGET ? "RT:" : "SoO:"); | |
823 | break; | |
824 | case ECOMMUNITY_FORMAT_ROUTE_MAP: | |
825 | prefix = ""; | |
826 | break; | |
827 | default: | |
828 | prefix = ""; | |
829 | break; | |
830 | } | |
831 | ||
832 | /* Put string into buffer. */ | |
833 | if (type == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 834 | pnt = ptr_get_be32(pnt, &eas.as); |
d62a17ae | 835 | eas.val = (*pnt++ << 8); |
836 | eas.val |= (*pnt++); | |
837 | ||
91085f97 | 838 | len = snprintf(buf, bufsz, "%s%u:%u", prefix, eas.as, eas.val); |
d62a17ae | 839 | } else if (type == ECOMMUNITY_ENCODE_AS) { |
9a659715 PG |
840 | if (ecom_size == ECOMMUNITY_SIZE) { |
841 | eas.as = (*pnt++ << 8); | |
842 | eas.as |= (*pnt++); | |
843 | pnt = ptr_get_be32(pnt, &eas.val); | |
d62a17ae | 844 | |
4371bf91 PG |
845 | len = snprintf(buf, bufsz, "%s%u:%u", prefix, eas.as, |
846 | eas.val); | |
9a659715 PG |
847 | } else { |
848 | /* this is an IPv6 ext community | |
c6423c31 | 849 | * first 16 bytes stands for IPv6 addres |
9a659715 PG |
850 | */ |
851 | memcpy(&eip6.ip, pnt, 16); | |
852 | pnt += 16; | |
853 | eip6.val = (*pnt++ << 8); | |
854 | eip6.val |= (*pnt++); | |
855 | ||
4371bf91 PG |
856 | inet_ntop(AF_INET6, &eip6.ip, buf_local, |
857 | sizeof(buf_local)); | |
9a659715 PG |
858 | len = snprintf(buf, bufsz, "%s%s:%u", prefix, |
859 | buf_local, eip6.val); | |
860 | } | |
d62a17ae | 861 | } else if (type == ECOMMUNITY_ENCODE_IP) { |
862 | memcpy(&eip.ip, pnt, 4); | |
863 | pnt += 4; | |
864 | eip.val = (*pnt++ << 8); | |
865 | eip.val |= (*pnt++); | |
866 | ||
23d0a753 DA |
867 | len = snprintfrr(buf, bufsz, "%s%pI4:%u", prefix, &eip.ip, |
868 | eip.val); | |
d62a17ae | 869 | } |
91085f97 QY |
870 | |
871 | /* consume value */ | |
872 | (void)pnt; | |
d62a17ae | 873 | |
874 | return len; | |
c5900768 | 875 | } |
876 | ||
9a659715 PG |
877 | static int ecommunity_rt_soo_str(char *buf, size_t bufsz, const uint8_t *pnt, |
878 | int type, int sub_type, int format) | |
879 | { | |
880 | return ecommunity_rt_soo_str_internal(buf, bufsz, pnt, type, | |
881 | sub_type, format, | |
882 | ECOMMUNITY_SIZE); | |
883 | } | |
884 | ||
8bcaad3d DA |
885 | /* Helper function to convert IEEE-754 Floating Point to uint32 */ |
886 | static uint32_t ieee_float_uint32_to_uint32(uint32_t u) | |
887 | { | |
888 | union { | |
889 | float r; | |
890 | uint32_t d; | |
891 | } f = {.d = u}; | |
892 | ||
893 | return (uint32_t)f.r; | |
894 | } | |
895 | ||
27aa23a4 DA |
896 | static int ecommunity_lb_str(char *buf, size_t bufsz, const uint8_t *pnt, |
897 | bool disable_ieee_floating) | |
7e3ebfd1 | 898 | { |
899 | int len = 0; | |
900 | as_t as; | |
8bcaad3d | 901 | uint32_t bw_tmp, bw; |
7e3ebfd1 | 902 | char bps_buf[20] = {0}; |
903 | ||
904 | #define ONE_GBPS_BYTES (1000 * 1000 * 1000 / 8) | |
905 | #define ONE_MBPS_BYTES (1000 * 1000 / 8) | |
906 | #define ONE_KBPS_BYTES (1000 / 8) | |
907 | ||
908 | as = (*pnt++ << 8); | |
909 | as |= (*pnt++); | |
8bcaad3d DA |
910 | (void)ptr_get_be32(pnt, &bw_tmp); |
911 | ||
27aa23a4 DA |
912 | bw = disable_ieee_floating ? bw_tmp |
913 | : ieee_float_uint32_to_uint32(bw_tmp); | |
8bcaad3d | 914 | |
7e3ebfd1 | 915 | if (bw >= ONE_GBPS_BYTES) |
772270f3 QY |
916 | snprintf(bps_buf, sizeof(bps_buf), "%.3f Gbps", |
917 | (float)(bw / ONE_GBPS_BYTES)); | |
7e3ebfd1 | 918 | else if (bw >= ONE_MBPS_BYTES) |
772270f3 QY |
919 | snprintf(bps_buf, sizeof(bps_buf), "%.3f Mbps", |
920 | (float)(bw / ONE_MBPS_BYTES)); | |
7e3ebfd1 | 921 | else if (bw >= ONE_KBPS_BYTES) |
772270f3 QY |
922 | snprintf(bps_buf, sizeof(bps_buf), "%.3f Kbps", |
923 | (float)(bw / ONE_KBPS_BYTES)); | |
7e3ebfd1 | 924 | else |
772270f3 | 925 | snprintf(bps_buf, sizeof(bps_buf), "%u bps", bw * 8); |
7e3ebfd1 | 926 | |
927 | len = snprintf(buf, bufsz, "LB:%u:%u (%s)", as, bw, bps_buf); | |
928 | return len; | |
929 | } | |
930 | ||
d62a17ae | 931 | /* Convert extended community attribute to string. |
718e3744 | 932 | |
933 | Due to historical reason of industry standard implementation, there | |
934 | are three types of format. | |
935 | ||
936 | route-map set extcommunity format | |
3efd0893 | 937 | "rt 100:1 100:2soo 100:3" |
718e3744 | 938 | |
939 | extcommunity-list | |
3efd0893 | 940 | "rt 100:1 rt 100:2 soo 100:3show [ip] bgp" and extcommunity-list regular expression matching |
d62a17ae | 941 | "RT:100:1 RT:100:2 SoO:100:3" |
718e3744 | 942 | |
943 | For each formath please use below definition for format: | |
944 | ||
945 | ECOMMUNITY_FORMAT_ROUTE_MAP | |
946 | ECOMMUNITY_FORMAT_COMMUNITY_LIST | |
947 | ECOMMUNITY_FORMAT_DISPLAY | |
e82202b7 | 948 | |
d62a17ae | 949 | Filter is added to display only ECOMMUNITY_ROUTE_TARGET in some cases. |
e82202b7 | 950 | 0 value displays all |
718e3744 | 951 | */ |
d62a17ae | 952 | char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter) |
718e3744 | 953 | { |
f6e07e1b | 954 | uint32_t i; |
d7c0a89a | 955 | uint8_t *pnt; |
1ef3c51f PG |
956 | uint8_t type = 0; |
957 | uint8_t sub_type = 0; | |
d62a17ae | 958 | int str_size; |
d62a17ae | 959 | char *str_buf; |
d62a17ae | 960 | |
6a37bfb7 | 961 | if (!ecom || ecom->size == 0) |
91085f97 QY |
962 | return XCALLOC(MTYPE_ECOMMUNITY_STR, 1); |
963 | ||
964 | /* ecom strlen + space + null term */ | |
965 | str_size = (ecom->size * (ECOMMUNITY_STRLEN + 1)) + 1; | |
966 | str_buf = XCALLOC(MTYPE_ECOMMUNITY_STR, str_size); | |
d62a17ae | 967 | |
91085f97 | 968 | char encbuf[128]; |
d62a17ae | 969 | |
970 | for (i = 0; i < ecom->size; i++) { | |
971 | int unk_ecom = 0; | |
91085f97 | 972 | memset(encbuf, 0x00, sizeof(encbuf)); |
d62a17ae | 973 | |
974 | /* Space between each value. */ | |
91085f97 QY |
975 | if (i > 0) |
976 | strlcat(str_buf, " ", str_size); | |
d62a17ae | 977 | |
91085f97 | 978 | /* Retrieve value field */ |
f32f3ae5 | 979 | pnt = ecom->val + (i * ecom->unit_size); |
d62a17ae | 980 | |
91085f97 | 981 | /* High-order octet is the type */ |
d62a17ae | 982 | type = *pnt++; |
983 | ||
984 | if (type == ECOMMUNITY_ENCODE_AS || type == ECOMMUNITY_ENCODE_IP | |
985 | || type == ECOMMUNITY_ENCODE_AS4) { | |
986 | /* Low-order octet of type. */ | |
987 | sub_type = *pnt++; | |
988 | if (sub_type != ECOMMUNITY_ROUTE_TARGET | |
2551b26e PG |
989 | && sub_type != ECOMMUNITY_SITE_ORIGIN) { |
990 | if (sub_type == | |
991 | ECOMMUNITY_FLOWSPEC_REDIRECT_IPV4 && | |
992 | type == ECOMMUNITY_ENCODE_IP) { | |
993 | struct in_addr *ipv4 = | |
994 | (struct in_addr *)pnt; | |
07380148 DA |
995 | snprintfrr(encbuf, sizeof(encbuf), |
996 | "NH:%pI4:%d", ipv4, pnt[5]); | |
7e3ebfd1 | 997 | } else if (sub_type == |
998 | ECOMMUNITY_LINK_BANDWIDTH && | |
999 | type == ECOMMUNITY_ENCODE_AS) { | |
27aa23a4 DA |
1000 | ecommunity_lb_str( |
1001 | encbuf, sizeof(encbuf), pnt, | |
1002 | ecom->disable_ieee_floating); | |
2551b26e PG |
1003 | } else |
1004 | unk_ecom = 1; | |
91085f97 QY |
1005 | } else { |
1006 | ecommunity_rt_soo_str(encbuf, sizeof(encbuf), | |
1007 | pnt, type, sub_type, | |
1008 | format); | |
1009 | } | |
d62a17ae | 1010 | } else if (type == ECOMMUNITY_ENCODE_OPAQUE) { |
1011 | if (filter == ECOMMUNITY_ROUTE_TARGET) | |
1012 | continue; | |
1013 | if (*pnt == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP) { | |
1014 | uint16_t tunneltype; | |
1015 | memcpy(&tunneltype, pnt + 5, 2); | |
1016 | tunneltype = ntohs(tunneltype); | |
91085f97 QY |
1017 | |
1018 | snprintf(encbuf, sizeof(encbuf), "ET:%d", | |
1019 | tunneltype); | |
996c9314 | 1020 | } else if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_DEF_GW) { |
91085f97 QY |
1021 | strlcpy(encbuf, "Default Gateway", |
1022 | sizeof(encbuf)); | |
1023 | } else { | |
d62a17ae | 1024 | unk_ecom = 1; |
91085f97 | 1025 | } |
d62a17ae | 1026 | } else if (type == ECOMMUNITY_ENCODE_EVPN) { |
1027 | if (filter == ECOMMUNITY_ROUTE_TARGET) | |
1028 | continue; | |
bc59a672 MK |
1029 | if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC) { |
1030 | struct ethaddr rmac; | |
d62a17ae | 1031 | pnt++; |
bc59a672 | 1032 | memcpy(&rmac, pnt, ETH_ALEN); |
91085f97 QY |
1033 | |
1034 | snprintf(encbuf, sizeof(encbuf), | |
1035 | "Rmac:%02x:%02x:%02x:%02x:%02x:%02x", | |
1036 | (uint8_t)rmac.octet[0], | |
1037 | (uint8_t)rmac.octet[1], | |
1038 | (uint8_t)rmac.octet[2], | |
1039 | (uint8_t)rmac.octet[3], | |
1040 | (uint8_t)rmac.octet[4], | |
1041 | (uint8_t)rmac.octet[5]); | |
d62a17ae | 1042 | } else if (*pnt |
1043 | == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY) { | |
d7c0a89a QY |
1044 | uint32_t seqnum; |
1045 | uint8_t flags = *++pnt; | |
d62a17ae | 1046 | |
1047 | memcpy(&seqnum, pnt + 2, 4); | |
1048 | seqnum = ntohl(seqnum); | |
91085f97 QY |
1049 | |
1050 | snprintf(encbuf, sizeof(encbuf), "MM:%u", | |
1051 | seqnum); | |
1052 | ||
1053 | if (CHECK_FLAG( | |
1054 | flags, | |
1055 | ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY)) | |
1056 | strlcat(encbuf, ", sticky MAC", | |
1057 | sizeof(encbuf)); | |
5cc359b2 CS |
1058 | } else if (*pnt == ECOMMUNITY_EVPN_SUBTYPE_ND) { |
1059 | uint8_t flags = *++pnt; | |
1060 | ||
91085f97 QY |
1061 | if (CHECK_FLAG( |
1062 | flags, | |
1063 | ECOMMUNITY_EVPN_SUBTYPE_ND_ROUTER_FLAG)) | |
1064 | strlcpy(encbuf, "ND:Router Flag", | |
1065 | sizeof(encbuf)); | |
7904e9fd AK |
1066 | if (CHECK_FLAG( |
1067 | flags, | |
1068 | ECOMMUNITY_EVPN_SUBTYPE_PROXY_FLAG)) | |
1069 | strlcpy(encbuf, "ND:Proxy", | |
1070 | sizeof(encbuf)); | |
4248407b AK |
1071 | } else if (*pnt |
1072 | == ECOMMUNITY_EVPN_SUBTYPE_ES_IMPORT_RT) { | |
1073 | struct ethaddr mac; | |
1074 | ||
1075 | pnt++; | |
1076 | memcpy(&mac, pnt, ETH_ALEN); | |
1077 | snprintf(encbuf, | |
1078 | sizeof(encbuf), | |
1079 | "ES-Import-Rt:%02x:%02x:%02x:%02x:%02x:%02x", | |
1080 | (uint8_t)mac.octet[0], | |
1081 | (uint8_t)mac.octet[1], | |
1082 | (uint8_t)mac.octet[2], | |
1083 | (uint8_t)mac.octet[3], | |
1084 | (uint8_t)mac.octet[4], | |
1085 | (uint8_t)mac.octet[5]); | |
1086 | } else if (*pnt | |
1087 | == ECOMMUNITY_EVPN_SUBTYPE_ESI_LABEL) { | |
1088 | uint8_t flags = *++pnt; | |
1089 | ||
1090 | snprintf(encbuf, | |
1091 | sizeof(encbuf), "ESI-label-Rt:%s", | |
1092 | (flags & | |
1093 | ECOMMUNITY_EVPN_SUBTYPE_ESI_SA_FLAG) ? | |
1094 | "SA":"AA"); | |
74e2bd89 AK |
1095 | } else if (*pnt |
1096 | == ECOMMUNITY_EVPN_SUBTYPE_DF_ELECTION) { | |
1097 | uint8_t alg; | |
1098 | uint16_t pref; | |
1099 | uint16_t bmap; | |
1100 | ||
1101 | alg = *(pnt + 1); | |
1102 | memcpy(&bmap, pnt + 2, 2); | |
1103 | bmap = ntohs(bmap); | |
1104 | memcpy(&pref, pnt + 5, 2); | |
1105 | pref = ntohs(pref); | |
1106 | ||
1107 | if (bmap) | |
1108 | snprintf( | |
1109 | encbuf, sizeof(encbuf), | |
1110 | "DF: (alg: %u, bmap: 0x%x pref: %u)", | |
1111 | alg, bmap, pref); | |
1112 | else | |
1113 | snprintf(encbuf, sizeof(encbuf), | |
1114 | "DF: (alg: %u, pref: %u)", alg, | |
1115 | pref); | |
d62a17ae | 1116 | } else |
1117 | unk_ecom = 1; | |
b72220fc PG |
1118 | } else if (type == ECOMMUNITY_ENCODE_REDIRECT_IP_NH) { |
1119 | sub_type = *pnt++; | |
1120 | if (sub_type == ECOMMUNITY_REDIRECT_IP_NH) { | |
91085f97 QY |
1121 | snprintf(encbuf, sizeof(encbuf), |
1122 | "FS:redirect IP 0x%x", *(pnt + 5)); | |
b72220fc PG |
1123 | } else |
1124 | unk_ecom = 1; | |
1ef3c51f PG |
1125 | } else if (type == ECOMMUNITY_ENCODE_TRANS_EXP || |
1126 | type == ECOMMUNITY_EXTENDED_COMMUNITY_PART_2 || | |
1127 | type == ECOMMUNITY_EXTENDED_COMMUNITY_PART_3) { | |
a8d72b61 | 1128 | sub_type = *pnt++; |
9a659715 PG |
1129 | |
1130 | if (sub_type == ECOMMUNITY_ROUTE_TARGET) { | |
8f242187 | 1131 | char buf[ECOMMUNITY_STRLEN]; |
9a659715 PG |
1132 | |
1133 | memset(buf, 0, sizeof(buf)); | |
1134 | ecommunity_rt_soo_str_internal(buf, sizeof(buf), | |
1135 | (const uint8_t *)pnt, | |
1136 | type & | |
1137 | ~ECOMMUNITY_ENCODE_TRANS_EXP, | |
1138 | ECOMMUNITY_ROUTE_TARGET, | |
1139 | format, | |
1140 | ecom->unit_size); | |
1141 | snprintf(encbuf, sizeof(encbuf), "%s", buf); | |
4371bf91 PG |
1142 | } else if (sub_type == |
1143 | ECOMMUNITY_FLOWSPEC_REDIRECT_IPV6) { | |
9a659715 PG |
1144 | char buf[64]; |
1145 | ||
1146 | memset(buf, 0, sizeof(buf)); | |
1147 | ecommunity_rt_soo_str_internal(buf, sizeof(buf), | |
1148 | (const uint8_t *)pnt, | |
1149 | type & | |
1150 | ~ECOMMUNITY_ENCODE_TRANS_EXP, | |
1151 | ECOMMUNITY_ROUTE_TARGET, | |
1152 | ECOMMUNITY_FORMAT_DISPLAY, | |
1153 | ecom->unit_size); | |
4371bf91 PG |
1154 | snprintf(encbuf, sizeof(encbuf), |
1155 | "FS:redirect VRF %s", buf); | |
9a659715 PG |
1156 | } else if (sub_type == ECOMMUNITY_REDIRECT_VRF) { |
1157 | char buf[16]; | |
1158 | ||
1159 | memset(buf, 0, sizeof(buf)); | |
4371bf91 PG |
1160 | ecommunity_rt_soo_str(buf, sizeof(buf), |
1161 | (const uint8_t *)pnt, | |
1162 | type & | |
1163 | ~ECOMMUNITY_ENCODE_TRANS_EXP, | |
1164 | ECOMMUNITY_ROUTE_TARGET, | |
1165 | ECOMMUNITY_FORMAT_DISPLAY); | |
1166 | snprintf(encbuf, sizeof(encbuf), | |
1167 | "FS:redirect VRF %s", buf); | |
91085f97 QY |
1168 | snprintf(encbuf, sizeof(encbuf), |
1169 | "FS:redirect VRF %s", buf); | |
1ef3c51f PG |
1170 | } else if (type != ECOMMUNITY_ENCODE_TRANS_EXP) |
1171 | unk_ecom = 1; | |
1172 | else if (sub_type == ECOMMUNITY_TRAFFIC_ACTION) { | |
a8d72b61 | 1173 | char action[64]; |
a8d72b61 PG |
1174 | |
1175 | if (*(pnt+3) == | |
1176 | 1 << FLOWSPEC_TRAFFIC_ACTION_TERMINAL) | |
91085f97 QY |
1177 | strlcpy(action, "terminate (apply)", |
1178 | sizeof(action)); | |
a8d72b61 | 1179 | else |
91085f97 QY |
1180 | strlcpy(action, "eval stops", |
1181 | sizeof(action)); | |
1182 | ||
a8d72b61 PG |
1183 | if (*(pnt+3) == |
1184 | 1 << FLOWSPEC_TRAFFIC_ACTION_SAMPLE) | |
91085f97 QY |
1185 | strlcat(action, ", sample", |
1186 | sizeof(action)); | |
1187 | ||
1188 | ||
1189 | snprintf(encbuf, sizeof(encbuf), "FS:action %s", | |
1190 | action); | |
a8d72b61 PG |
1191 | } else if (sub_type == ECOMMUNITY_TRAFFIC_RATE) { |
1192 | union traffic_rate data; | |
1193 | ||
1194 | data.rate_byte[3] = *(pnt+2); | |
1195 | data.rate_byte[2] = *(pnt+3); | |
1196 | data.rate_byte[1] = *(pnt+4); | |
1197 | data.rate_byte[0] = *(pnt+5); | |
91085f97 QY |
1198 | snprintf(encbuf, sizeof(encbuf), "FS:rate %f", |
1199 | data.rate_float); | |
a8d72b61 | 1200 | } else if (sub_type == ECOMMUNITY_TRAFFIC_MARKING) { |
91085f97 QY |
1201 | snprintf(encbuf, sizeof(encbuf), |
1202 | "FS:marking %u", *(pnt + 5)); | |
a8d72b61 PG |
1203 | } else |
1204 | unk_ecom = 1; | |
7e3ebfd1 | 1205 | } else if (type == ECOMMUNITY_ENCODE_AS_NON_TRANS) { |
1206 | sub_type = *pnt++; | |
1207 | if (sub_type == ECOMMUNITY_LINK_BANDWIDTH) | |
27aa23a4 DA |
1208 | ecommunity_lb_str(encbuf, sizeof(encbuf), pnt, |
1209 | ecom->disable_ieee_floating); | |
7e3ebfd1 | 1210 | else |
1211 | unk_ecom = 1; | |
7b27cf7b DA |
1212 | } else if (type == ECOMMUNITY_ENCODE_OPAQUE_NON_TRANS) { |
1213 | sub_type = *pnt++; | |
1214 | if (sub_type == ECOMMUNITY_ORIGIN_VALIDATION_STATE) | |
1215 | ecommunity_origin_validation_state_str( | |
1216 | encbuf, sizeof(encbuf), pnt); | |
1217 | else | |
1218 | unk_ecom = 1; | |
1ef3c51f PG |
1219 | } else { |
1220 | sub_type = *pnt++; | |
d62a17ae | 1221 | unk_ecom = 1; |
1ef3c51f | 1222 | } |
d62a17ae | 1223 | |
1224 | if (unk_ecom) | |
91085f97 QY |
1225 | snprintf(encbuf, sizeof(encbuf), "UNK:%d, %d", type, |
1226 | sub_type); | |
d62a17ae | 1227 | |
91085f97 QY |
1228 | int r = strlcat(str_buf, encbuf, str_size); |
1229 | assert(r < str_size); | |
94431dbc C |
1230 | } |
1231 | ||
d62a17ae | 1232 | return str_buf; |
718e3744 | 1233 | } |
4372df71 | 1234 | |
2d7cdc5b DA |
1235 | bool ecommunity_include(struct ecommunity *e1, struct ecommunity *e2) |
1236 | { | |
1237 | uint32_t i, j; | |
1238 | ||
1239 | if (!e1 || !e2) | |
1240 | return false; | |
1241 | for (i = 0; i < e1->size; ++i) { | |
1242 | for (j = 0; j < e2->size; ++j) { | |
1243 | if (!memcmp(e1->val + (i * e1->unit_size), | |
1244 | e2->val + (j * e2->unit_size), | |
1245 | e1->unit_size)) | |
1246 | return true; | |
1247 | } | |
1248 | } | |
1249 | return false; | |
1250 | } | |
1251 | ||
3dc339cd DA |
1252 | bool ecommunity_match(const struct ecommunity *ecom1, |
1253 | const struct ecommunity *ecom2) | |
4372df71 | 1254 | { |
f6e07e1b DS |
1255 | uint32_t i = 0; |
1256 | uint32_t j = 0; | |
d62a17ae | 1257 | |
1258 | if (ecom1 == NULL && ecom2 == NULL) | |
3dc339cd | 1259 | return true; |
d62a17ae | 1260 | |
1261 | if (ecom1 == NULL || ecom2 == NULL) | |
3dc339cd | 1262 | return false; |
d62a17ae | 1263 | |
1264 | if (ecom1->size < ecom2->size) | |
3dc339cd | 1265 | return false; |
d62a17ae | 1266 | |
1267 | /* Every community on com2 needs to be on com1 for this to match */ | |
1268 | while (i < ecom1->size && j < ecom2->size) { | |
9a659715 PG |
1269 | if (memcmp(ecom1->val + i * ecom1->unit_size, |
1270 | ecom2->val + j * ecom2->unit_size, | |
1271 | ecom2->unit_size) | |
d62a17ae | 1272 | == 0) |
1273 | j++; | |
1274 | i++; | |
1275 | } | |
1276 | ||
1277 | if (j == ecom2->size) | |
3dc339cd | 1278 | return true; |
d62a17ae | 1279 | else |
3dc339cd | 1280 | return false; |
4372df71 | 1281 | } |
1e27ef50 PG |
1282 | |
1283 | /* return first occurence of type */ | |
d62a17ae | 1284 | extern struct ecommunity_val *ecommunity_lookup(const struct ecommunity *ecom, |
1285 | uint8_t type, uint8_t subtype) | |
1e27ef50 | 1286 | { |
d7c0a89a | 1287 | uint8_t *p; |
f6e07e1b | 1288 | uint32_t c; |
d62a17ae | 1289 | |
1290 | /* If the value already exists in the structure return 0. */ | |
1291 | c = 0; | |
9a659715 | 1292 | for (p = ecom->val; c < ecom->size; p += ecom->unit_size, c++) { |
d62a17ae | 1293 | if (p == NULL) { |
1294 | continue; | |
1295 | } | |
1296 | if (p[0] == type && p[1] == subtype) | |
1297 | return (struct ecommunity_val *)p; | |
1298 | } | |
1299 | return NULL; | |
1e27ef50 PG |
1300 | } |
1301 | ||
1302 | /* remove ext. community matching type and subtype | |
1303 | * return 1 on success ( removed ), 0 otherwise (not present) | |
1304 | */ | |
1207a5bc | 1305 | bool ecommunity_strip(struct ecommunity *ecom, uint8_t type, |
1306 | uint8_t subtype) | |
1e27ef50 | 1307 | { |
003bc275 | 1308 | uint8_t *p, *q, *new; |
f6e07e1b | 1309 | uint32_t c, found = 0; |
d62a17ae | 1310 | /* When this is fist value, just add it. */ |
3dc339cd DA |
1311 | if (ecom == NULL || ecom->val == NULL) |
1312 | return false; | |
d62a17ae | 1313 | |
003bc275 | 1314 | /* Check if any existing ext community matches. */ |
1315 | /* Certain extended communities like the Route Target can be present | |
1316 | * multiple times, handle that. | |
1317 | */ | |
d62a17ae | 1318 | c = 0; |
9a659715 | 1319 | for (p = ecom->val; c < ecom->size; p += ecom->unit_size, c++) { |
003bc275 | 1320 | if (p[0] == type && p[1] == subtype) |
1321 | found++; | |
d62a17ae | 1322 | } |
003bc275 | 1323 | /* If no matching ext community exists, return. */ |
d62a17ae | 1324 | if (found == 0) |
3dc339cd | 1325 | return false; |
003bc275 | 1326 | |
1327 | /* Handle the case where everything needs to be stripped. */ | |
1328 | if (found == ecom->size) { | |
1329 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
1330 | ecom->size = 0; | |
3dc339cd | 1331 | return true; |
003bc275 | 1332 | } |
1333 | ||
1334 | /* Strip matching ext community(ies). */ | |
1335 | new = XMALLOC(MTYPE_ECOMMUNITY_VAL, | |
9a659715 | 1336 | (ecom->size - found) * ecom->unit_size); |
003bc275 | 1337 | q = new; |
9a659715 | 1338 | for (c = 0, p = ecom->val; c < ecom->size; c++, p += ecom->unit_size) { |
003bc275 | 1339 | if (!(p[0] == type && p[1] == subtype)) { |
9a659715 PG |
1340 | memcpy(q, p, ecom->unit_size); |
1341 | q += ecom->unit_size; | |
003bc275 | 1342 | } |
1343 | } | |
1344 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
1345 | ecom->val = new; | |
1346 | ecom->size -= found; | |
3dc339cd | 1347 | return true; |
1e27ef50 | 1348 | } |
44338987 | 1349 | |
1350 | /* | |
1351 | * Remove specified extended community value from extended community. | |
1352 | * Returns 1 if value was present (and hence, removed), 0 otherwise. | |
1353 | */ | |
3dc339cd | 1354 | bool ecommunity_del_val(struct ecommunity *ecom, struct ecommunity_val *eval) |
44338987 | 1355 | { |
f27f864e | 1356 | uint8_t *p; |
f6e07e1b | 1357 | uint32_t c, found = 0; |
44338987 | 1358 | |
1359 | /* Make sure specified value exists. */ | |
1360 | if (ecom == NULL || ecom->val == NULL) | |
3dc339cd | 1361 | return false; |
44338987 | 1362 | c = 0; |
9a659715 PG |
1363 | for (p = ecom->val; c < ecom->size; p += ecom->unit_size, c++) { |
1364 | if (!memcmp(p, eval->val, ecom->unit_size)) { | |
44338987 | 1365 | found = 1; |
1366 | break; | |
1367 | } | |
1368 | } | |
1369 | if (found == 0) | |
3dc339cd | 1370 | return false; |
44338987 | 1371 | |
1372 | /* Delete the selected value */ | |
1373 | ecom->size--; | |
de7cee09 AR |
1374 | if (ecom->size) { |
1375 | p = XMALLOC(MTYPE_ECOMMUNITY_VAL, ecom->size * ecom->unit_size); | |
1376 | if (c != 0) | |
1377 | memcpy(p, ecom->val, c * ecom->unit_size); | |
1378 | if ((ecom->size - c) != 0) | |
1379 | memcpy(p + (c)*ecom->unit_size, | |
1380 | ecom->val + (c + 1) * ecom->unit_size, | |
1381 | (ecom->size - c) * ecom->unit_size); | |
1382 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); | |
1383 | ecom->val = p; | |
1384 | } else | |
92d53761 | 1385 | XFREE(MTYPE_ECOMMUNITY_VAL, ecom->val); |
de7cee09 | 1386 | |
3dc339cd | 1387 | return true; |
44338987 | 1388 | } |
dacf6ec1 PG |
1389 | |
1390 | int ecommunity_fill_pbr_action(struct ecommunity_val *ecom_eval, | |
f01e580f PG |
1391 | struct bgp_pbr_entry_action *api, |
1392 | afi_t afi) | |
dacf6ec1 PG |
1393 | { |
1394 | if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_RATE) { | |
1395 | api->action = ACTION_TRAFFICRATE; | |
1396 | api->u.r.rate_info[3] = ecom_eval->val[4]; | |
1397 | api->u.r.rate_info[2] = ecom_eval->val[5]; | |
1398 | api->u.r.rate_info[1] = ecom_eval->val[6]; | |
1399 | api->u.r.rate_info[0] = ecom_eval->val[7]; | |
1400 | } else if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_ACTION) { | |
1401 | api->action = ACTION_TRAFFIC_ACTION; | |
1402 | /* else distribute code is set by default */ | |
1403 | if (ecom_eval->val[5] & (1 << FLOWSPEC_TRAFFIC_ACTION_TERMINAL)) | |
1404 | api->u.za.filter |= TRAFFIC_ACTION_TERMINATE; | |
1405 | else | |
1406 | api->u.za.filter |= TRAFFIC_ACTION_DISTRIBUTE; | |
1407 | if (ecom_eval->val[5] == 1 << FLOWSPEC_TRAFFIC_ACTION_SAMPLE) | |
1408 | api->u.za.filter |= TRAFFIC_ACTION_SAMPLE; | |
1409 | ||
1410 | } else if (ecom_eval->val[1] == ECOMMUNITY_TRAFFIC_MARKING) { | |
1411 | api->action = ACTION_MARKING; | |
1412 | api->u.marking_dscp = ecom_eval->val[7]; | |
1413 | } else if (ecom_eval->val[1] == ECOMMUNITY_REDIRECT_VRF) { | |
1414 | /* must use external function */ | |
1415 | return 0; | |
f01e580f PG |
1416 | } else if (ecom_eval->val[1] == ECOMMUNITY_REDIRECT_IP_NH && |
1417 | afi == AFI_IP) { | |
dacf6ec1 PG |
1418 | /* see draft-ietf-idr-flowspec-redirect-ip-02 |
1419 | * Q1: how come a ext. community can host ipv6 address | |
1420 | * Q2 : from cisco documentation: | |
1421 | * Announces the reachability of one or more flowspec NLRI. | |
1422 | * When a BGP speaker receives an UPDATE message with the | |
1423 | * redirect-to-IP extended community, it is expected to | |
1424 | * create a traffic filtering rule for every flow-spec | |
1425 | * NLRI in the message that has this path as its best | |
1426 | * path. The filter entry matches the IP packets | |
1427 | * described in the NLRI field and redirects them or | |
1428 | * copies them towards the IPv4 or IPv6 address specified | |
1429 | * in the 'Network Address of Next- Hop' | |
1430 | * field of the associated MP_REACH_NLRI. | |
1431 | */ | |
1432 | struct ecommunity_ip *ip_ecom = (struct ecommunity_ip *) | |
1433 | ecom_eval + 2; | |
1434 | ||
1435 | api->u.zr.redirect_ip_v4 = ip_ecom->ip; | |
1436 | } else | |
1437 | return -1; | |
1438 | return 0; | |
1439 | } | |
5b820d9e NT |
1440 | |
1441 | static struct ecommunity *bgp_aggr_ecommunity_lookup( | |
1442 | struct bgp_aggregate *aggregate, | |
1443 | struct ecommunity *ecommunity) | |
1444 | { | |
1445 | return hash_lookup(aggregate->ecommunity_hash, ecommunity); | |
1446 | } | |
1447 | ||
1448 | static void *bgp_aggr_ecommunty_hash_alloc(void *p) | |
1449 | { | |
1450 | struct ecommunity *ref = (struct ecommunity *)p; | |
1451 | struct ecommunity *ecommunity = NULL; | |
1452 | ||
1453 | ecommunity = ecommunity_dup(ref); | |
1454 | return ecommunity; | |
1455 | } | |
1456 | ||
7f5818fb | 1457 | static void bgp_aggr_ecommunity_prepare(struct hash_bucket *hb, void *arg) |
5b820d9e | 1458 | { |
5b820d9e NT |
1459 | struct ecommunity *hb_ecommunity = hb->data; |
1460 | struct ecommunity **aggr_ecommunity = arg; | |
1461 | ||
4edd83f9 | 1462 | if (*aggr_ecommunity) |
1463 | *aggr_ecommunity = ecommunity_merge(*aggr_ecommunity, | |
1464 | hb_ecommunity); | |
1465 | else | |
5b820d9e NT |
1466 | *aggr_ecommunity = ecommunity_dup(hb_ecommunity); |
1467 | } | |
1468 | ||
1469 | void bgp_aggr_ecommunity_remove(void *arg) | |
1470 | { | |
1471 | struct ecommunity *ecommunity = arg; | |
1472 | ||
1473 | ecommunity_free(&ecommunity); | |
1474 | } | |
1475 | ||
1476 | void bgp_compute_aggregate_ecommunity(struct bgp_aggregate *aggregate, | |
1477 | struct ecommunity *ecommunity) | |
4edd83f9 | 1478 | { |
1479 | bgp_compute_aggregate_ecommunity_hash(aggregate, ecommunity); | |
1480 | bgp_compute_aggregate_ecommunity_val(aggregate); | |
1481 | } | |
1482 | ||
1483 | ||
1484 | void bgp_compute_aggregate_ecommunity_hash(struct bgp_aggregate *aggregate, | |
1485 | struct ecommunity *ecommunity) | |
5b820d9e NT |
1486 | { |
1487 | struct ecommunity *aggr_ecommunity = NULL; | |
1488 | ||
1489 | if ((aggregate == NULL) || (ecommunity == NULL)) | |
1490 | return; | |
1491 | ||
1492 | /* Create hash if not already created. | |
1493 | */ | |
1494 | if (aggregate->ecommunity_hash == NULL) | |
1495 | aggregate->ecommunity_hash = hash_create( | |
1496 | ecommunity_hash_make, ecommunity_cmp, | |
1497 | "BGP Aggregator ecommunity hash"); | |
1498 | ||
1499 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1500 | if (aggr_ecommunity == NULL) { | |
1501 | /* Insert ecommunity into hash. | |
1502 | */ | |
1503 | aggr_ecommunity = hash_get(aggregate->ecommunity_hash, | |
1504 | ecommunity, | |
1505 | bgp_aggr_ecommunty_hash_alloc); | |
4edd83f9 | 1506 | } |
5b820d9e | 1507 | |
4edd83f9 | 1508 | /* Increment reference counter. |
1509 | */ | |
1510 | aggr_ecommunity->refcnt++; | |
1511 | } | |
5b820d9e | 1512 | |
4edd83f9 | 1513 | void bgp_compute_aggregate_ecommunity_val(struct bgp_aggregate *aggregate) |
1514 | { | |
1515 | struct ecommunity *ecommerge = NULL; | |
1516 | ||
1517 | if (aggregate == NULL) | |
1518 | return; | |
1519 | ||
1520 | /* Re-compute aggregate's ecommunity. | |
1521 | */ | |
1522 | if (aggregate->ecommunity) | |
1523 | ecommunity_free(&aggregate->ecommunity); | |
1524 | if (aggregate->ecommunity_hash | |
1525 | && aggregate->ecommunity_hash->count) { | |
5b820d9e NT |
1526 | hash_iterate(aggregate->ecommunity_hash, |
1527 | bgp_aggr_ecommunity_prepare, | |
1528 | &aggregate->ecommunity); | |
4edd83f9 | 1529 | ecommerge = aggregate->ecommunity; |
1530 | aggregate->ecommunity = ecommunity_uniq_sort(ecommerge); | |
1531 | if (ecommerge) | |
1532 | ecommunity_free(&ecommerge); | |
5b820d9e | 1533 | } |
5b820d9e NT |
1534 | } |
1535 | ||
1536 | void bgp_remove_ecommunity_from_aggregate(struct bgp_aggregate *aggregate, | |
1537 | struct ecommunity *ecommunity) | |
1538 | { | |
1539 | struct ecommunity *aggr_ecommunity = NULL; | |
1540 | struct ecommunity *ret_ecomm = NULL; | |
1541 | ||
4edd83f9 | 1542 | if ((!aggregate) |
1543 | || (!aggregate->ecommunity_hash) | |
1544 | || (!ecommunity)) | |
5b820d9e NT |
1545 | return; |
1546 | ||
1547 | /* Look-up the ecommunity in the hash. | |
1548 | */ | |
1549 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1550 | if (aggr_ecommunity) { | |
1551 | aggr_ecommunity->refcnt--; | |
1552 | ||
1553 | if (aggr_ecommunity->refcnt == 0) { | |
1554 | ret_ecomm = hash_release(aggregate->ecommunity_hash, | |
1555 | aggr_ecommunity); | |
1556 | ecommunity_free(&ret_ecomm); | |
4edd83f9 | 1557 | bgp_compute_aggregate_ecommunity_val(aggregate); |
1558 | } | |
1559 | } | |
1560 | } | |
1561 | ||
1562 | void bgp_remove_ecomm_from_aggregate_hash(struct bgp_aggregate *aggregate, | |
1563 | struct ecommunity *ecommunity) | |
1564 | { | |
1565 | ||
1566 | struct ecommunity *aggr_ecommunity = NULL; | |
1567 | struct ecommunity *ret_ecomm = NULL; | |
5b820d9e | 1568 | |
4edd83f9 | 1569 | if ((!aggregate) |
1570 | || (!aggregate->ecommunity_hash) | |
1571 | || (!ecommunity)) | |
1572 | return; | |
5b820d9e | 1573 | |
4edd83f9 | 1574 | /* Look-up the ecommunity in the hash. |
1575 | */ | |
1576 | aggr_ecommunity = bgp_aggr_ecommunity_lookup(aggregate, ecommunity); | |
1577 | if (aggr_ecommunity) { | |
1578 | aggr_ecommunity->refcnt--; | |
1579 | ||
1580 | if (aggr_ecommunity->refcnt == 0) { | |
1581 | ret_ecomm = hash_release(aggregate->ecommunity_hash, | |
1582 | aggr_ecommunity); | |
1583 | ecommunity_free(&ret_ecomm); | |
5b820d9e NT |
1584 | } |
1585 | } | |
1586 | } | |
d901dc13 | 1587 | |
7b27cf7b DA |
1588 | struct ecommunity * |
1589 | ecommunity_add_origin_validation_state(enum rpki_states rpki_state, | |
1590 | struct ecommunity *old) | |
1591 | { | |
1592 | struct ecommunity *new = NULL; | |
1593 | struct ecommunity ovs_ecomm = {0}; | |
1594 | struct ecommunity_val ovs_eval; | |
1595 | ||
1596 | encode_origin_validation_state(rpki_state, &ovs_eval); | |
1597 | ||
1598 | if (old) { | |
1599 | new = ecommunity_dup(old); | |
1600 | ecommunity_add_val(new, &ovs_eval, true, true); | |
1601 | if (!old->refcnt) | |
1602 | ecommunity_free(&old); | |
1603 | } else { | |
1604 | ovs_ecomm.size = 1; | |
1605 | ovs_ecomm.unit_size = ECOMMUNITY_SIZE; | |
1606 | ovs_ecomm.val = (uint8_t *)&ovs_eval.val; | |
1607 | new = ecommunity_dup(&ovs_ecomm); | |
1608 | } | |
1609 | ||
1610 | return new; | |
1611 | } | |
1612 | ||
d901dc13 | 1613 | /* |
1614 | * return the BGP link bandwidth extended community, if present; | |
1615 | * the actual bandwidth is returned via param | |
1616 | */ | |
1617 | const uint8_t *ecommunity_linkbw_present(struct ecommunity *ecom, uint32_t *bw) | |
1618 | { | |
1619 | const uint8_t *eval; | |
f6e07e1b | 1620 | uint32_t i; |
d901dc13 | 1621 | |
1622 | if (bw) | |
1623 | *bw = 0; | |
1624 | ||
1625 | if (!ecom || !ecom->size) | |
1626 | return NULL; | |
1627 | ||
1628 | for (i = 0; i < ecom->size; i++) { | |
1629 | const uint8_t *pnt; | |
1630 | uint8_t type, sub_type; | |
1631 | uint32_t bwval; | |
1632 | ||
1633 | eval = pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
1634 | type = *pnt++; | |
1635 | sub_type = *pnt++; | |
1636 | ||
1637 | if ((type == ECOMMUNITY_ENCODE_AS || | |
1638 | type == ECOMMUNITY_ENCODE_AS_NON_TRANS) && | |
1639 | sub_type == ECOMMUNITY_LINK_BANDWIDTH) { | |
1640 | pnt += 2; /* bandwidth is encoded as AS:val */ | |
1641 | pnt = ptr_get_be32(pnt, &bwval); | |
1642 | (void)pnt; /* consume value */ | |
1643 | if (bw) | |
27aa23a4 DA |
1644 | *bw = ecom->disable_ieee_floating |
1645 | ? bwval | |
1646 | : ieee_float_uint32_to_uint32( | |
1647 | bwval); | |
d901dc13 | 1648 | return eval; |
1649 | } | |
1650 | } | |
1651 | ||
1652 | return NULL; | |
1653 | } | |
7b651a32 | 1654 | |
1655 | ||
27aa23a4 DA |
1656 | struct ecommunity *ecommunity_replace_linkbw(as_t as, struct ecommunity *ecom, |
1657 | uint64_t cum_bw, | |
1658 | bool disable_ieee_floating) | |
7b651a32 | 1659 | { |
1660 | struct ecommunity *new; | |
1661 | struct ecommunity_val lb_eval; | |
1662 | const uint8_t *eval; | |
1663 | uint8_t type; | |
1664 | uint32_t cur_bw; | |
1665 | ||
1666 | /* Nothing to replace if link-bandwidth doesn't exist or | |
1667 | * is non-transitive - just return existing extcommunity. | |
1668 | */ | |
1669 | new = ecom; | |
1670 | if (!ecom || !ecom->size) | |
1671 | return new; | |
1672 | ||
1673 | eval = ecommunity_linkbw_present(ecom, &cur_bw); | |
1674 | if (!eval) | |
1675 | return new; | |
1676 | ||
1677 | type = *eval; | |
1678 | if (type & ECOMMUNITY_FLAG_NON_TRANSITIVE) | |
1679 | return new; | |
1680 | ||
1681 | /* Transitive link-bandwidth exists, replace with the passed | |
1682 | * (cumulative) bandwidth value. We need to create a new | |
1683 | * extcommunity for this - refer to AS-Path replace function | |
1684 | * for reference. | |
1685 | */ | |
1686 | if (cum_bw > 0xFFFFFFFF) | |
1687 | cum_bw = 0xFFFFFFFF; | |
27aa23a4 DA |
1688 | encode_lb_extcomm(as > BGP_AS_MAX ? BGP_AS_TRANS : as, cum_bw, false, |
1689 | &lb_eval, disable_ieee_floating); | |
7b651a32 | 1690 | new = ecommunity_dup(ecom); |
1691 | ecommunity_add_val(new, &lb_eval, true, true); | |
1692 | ||
1693 | return new; | |
1694 | } |