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718e3744 | 1 | /* Community attribute related functions. |
896014f4 DL |
2 | * Copyright (C) 1998, 2001 Kunihiro Ishiguro |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
718e3744 | 20 | |
21 | #include <zebra.h> | |
22 | ||
4dcadbef | 23 | #include "command.h" |
718e3744 | 24 | #include "hash.h" |
25 | #include "memory.h" | |
26 | ||
4a1ab8e4 | 27 | #include "bgpd/bgp_memory.h" |
718e3744 | 28 | #include "bgpd/bgp_community.h" |
29 | ||
30 | /* Hash of community attribute. */ | |
730394d9 | 31 | static struct hash *comhash; |
718e3744 | 32 | |
33 | /* Allocate a new communities value. */ | |
d62a17ae | 34 | static struct community *community_new(void) |
718e3744 | 35 | { |
d62a17ae | 36 | return (struct community *)XCALLOC(MTYPE_COMMUNITY, |
37 | sizeof(struct community)); | |
718e3744 | 38 | } |
39 | ||
40 | /* Free communities value. */ | |
d62a17ae | 41 | void community_free(struct community *com) |
718e3744 | 42 | { |
d62a17ae | 43 | if (com->val) |
44 | XFREE(MTYPE_COMMUNITY_VAL, com->val); | |
45 | if (com->str) | |
46 | XFREE(MTYPE_COMMUNITY_STR, com->str); | |
47 | ||
48 | if (com->json) { | |
49 | json_object_free(com->json); | |
50 | com->json = NULL; | |
51 | } | |
52 | ||
53 | XFREE(MTYPE_COMMUNITY, com); | |
718e3744 | 54 | } |
55 | ||
56 | /* Add one community value to the community. */ | |
d62a17ae | 57 | static void community_add_val(struct community *com, u_int32_t val) |
718e3744 | 58 | { |
d62a17ae | 59 | com->size++; |
60 | if (com->val) | |
61 | com->val = XREALLOC(MTYPE_COMMUNITY_VAL, com->val, | |
62 | com_length(com)); | |
63 | else | |
64 | com->val = XMALLOC(MTYPE_COMMUNITY_VAL, com_length(com)); | |
65 | ||
66 | val = htonl(val); | |
67 | memcpy(com_lastval(com), &val, sizeof(u_int32_t)); | |
718e3744 | 68 | } |
69 | ||
70 | /* Delete one community. */ | |
d62a17ae | 71 | void community_del_val(struct community *com, u_int32_t *val) |
718e3744 | 72 | { |
d62a17ae | 73 | int i = 0; |
74 | int c = 0; | |
75 | ||
76 | if (!com->val) | |
77 | return; | |
78 | ||
79 | while (i < com->size) { | |
80 | if (memcmp(com->val + i, val, sizeof(u_int32_t)) == 0) { | |
81 | c = com->size - i - 1; | |
82 | ||
83 | if (c > 0) | |
84 | memmove(com->val + i, com->val + (i + 1), | |
85 | c * sizeof(*val)); | |
86 | ||
87 | com->size--; | |
88 | ||
89 | if (com->size > 0) | |
90 | com->val = XREALLOC(MTYPE_COMMUNITY_VAL, | |
91 | com->val, com_length(com)); | |
92 | else { | |
93 | XFREE(MTYPE_COMMUNITY_VAL, com->val); | |
94 | com->val = NULL; | |
95 | } | |
96 | return; | |
97 | } | |
98 | i++; | |
718e3744 | 99 | } |
718e3744 | 100 | } |
101 | ||
102 | /* Delete all communities listed in com2 from com1 */ | |
d62a17ae | 103 | struct community *community_delete(struct community *com1, |
104 | struct community *com2) | |
718e3744 | 105 | { |
d62a17ae | 106 | int i = 0; |
718e3744 | 107 | |
d62a17ae | 108 | while (i < com2->size) { |
109 | community_del_val(com1, com2->val + i); | |
110 | i++; | |
111 | } | |
718e3744 | 112 | |
d62a17ae | 113 | return com1; |
718e3744 | 114 | } |
115 | ||
116 | /* Callback function from qsort(). */ | |
d62a17ae | 117 | static int community_compare(const void *a1, const void *a2) |
718e3744 | 118 | { |
d62a17ae | 119 | u_int32_t v1; |
120 | u_int32_t v2; | |
121 | ||
122 | memcpy(&v1, a1, sizeof(u_int32_t)); | |
123 | memcpy(&v2, a2, sizeof(u_int32_t)); | |
124 | v1 = ntohl(v1); | |
125 | v2 = ntohl(v2); | |
126 | ||
127 | if (v1 < v2) | |
128 | return -1; | |
129 | if (v1 > v2) | |
130 | return 1; | |
131 | return 0; | |
718e3744 | 132 | } |
133 | ||
d62a17ae | 134 | int community_include(struct community *com, u_int32_t val) |
718e3744 | 135 | { |
d62a17ae | 136 | int i; |
718e3744 | 137 | |
d62a17ae | 138 | val = htonl(val); |
718e3744 | 139 | |
d62a17ae | 140 | for (i = 0; i < com->size; i++) |
141 | if (memcmp(&val, com_nthval(com, i), sizeof(u_int32_t)) == 0) | |
142 | return 1; | |
718e3744 | 143 | |
d62a17ae | 144 | return 0; |
718e3744 | 145 | } |
146 | ||
d62a17ae | 147 | u_int32_t community_val_get(struct community *com, int i) |
718e3744 | 148 | { |
d62a17ae | 149 | u_char *p; |
150 | u_int32_t val; | |
718e3744 | 151 | |
d62a17ae | 152 | p = (u_char *)com->val; |
153 | p += (i * 4); | |
718e3744 | 154 | |
d62a17ae | 155 | memcpy(&val, p, sizeof(u_int32_t)); |
718e3744 | 156 | |
d62a17ae | 157 | return ntohl(val); |
718e3744 | 158 | } |
159 | ||
160 | /* Sort and uniq given community. */ | |
d62a17ae | 161 | struct community *community_uniq_sort(struct community *com) |
718e3744 | 162 | { |
d62a17ae | 163 | int i; |
164 | struct community *new; | |
165 | u_int32_t val; | |
166 | ||
167 | if (!com) | |
168 | return NULL; | |
169 | ||
170 | new = community_new(); | |
171 | ; | |
172 | new->json = NULL; | |
173 | ||
174 | for (i = 0; i < com->size; i++) { | |
175 | val = community_val_get(com, i); | |
176 | ||
177 | if (!community_include(new, val)) | |
178 | community_add_val(new, val); | |
179 | } | |
180 | ||
181 | qsort(new->val, new->size, sizeof(u_int32_t), community_compare); | |
182 | ||
183 | return new; | |
718e3744 | 184 | } |
185 | ||
186 | /* Convert communities attribute to string. | |
187 | ||
188 | For Well-known communities value, below keyword is used. | |
189 | ||
d62a17ae | 190 | 0x0 "internet" |
718e3744 | 191 | 0xFFFFFF01 "no-export" |
192 | 0xFFFFFF02 "no-advertise" | |
193 | 0xFFFFFF03 "local-AS" | |
194 | ||
195 | For other values, "AS:VAL" format is used. */ | |
d62a17ae | 196 | static void set_community_string(struct community *com) |
718e3744 | 197 | { |
d62a17ae | 198 | int i; |
199 | char *str; | |
200 | char *pnt; | |
201 | int len; | |
202 | int first; | |
203 | u_int32_t comval; | |
204 | u_int16_t as; | |
205 | u_int16_t val; | |
206 | json_object *json_community_list = NULL; | |
207 | json_object *json_string = NULL; | |
208 | ||
209 | if (!com) | |
210 | return; | |
211 | ||
212 | com->json = json_object_new_object(); | |
213 | json_community_list = json_object_new_array(); | |
214 | ||
215 | /* When communities attribute is empty. */ | |
216 | if (com->size == 0) { | |
217 | str = XMALLOC(MTYPE_COMMUNITY_STR, 1); | |
218 | str[0] = '\0'; | |
219 | ||
220 | json_object_string_add(com->json, "string", ""); | |
221 | json_object_object_add(com->json, "list", json_community_list); | |
222 | com->str = str; | |
223 | return; | |
718e3744 | 224 | } |
d62a17ae | 225 | |
226 | /* Memory allocation is time consuming work. So we calculate | |
227 | required string length first. */ | |
228 | len = 0; | |
229 | ||
230 | for (i = 0; i < com->size; i++) { | |
231 | memcpy(&comval, com_nthval(com, i), sizeof(u_int32_t)); | |
232 | comval = ntohl(comval); | |
233 | ||
234 | switch (comval) { | |
235 | case COMMUNITY_INTERNET: | |
236 | len += strlen(" internet"); | |
237 | break; | |
238 | case COMMUNITY_NO_EXPORT: | |
239 | len += strlen(" no-export"); | |
240 | break; | |
241 | case COMMUNITY_NO_ADVERTISE: | |
242 | len += strlen(" no-advertise"); | |
243 | break; | |
244 | case COMMUNITY_LOCAL_AS: | |
245 | len += strlen(" local-AS"); | |
246 | break; | |
247 | default: | |
248 | len += strlen(" 65536:65535"); | |
249 | break; | |
250 | } | |
251 | } | |
252 | ||
253 | /* Allocate memory. */ | |
254 | str = pnt = XMALLOC(MTYPE_COMMUNITY_STR, len); | |
255 | first = 1; | |
256 | ||
257 | /* Fill in string. */ | |
258 | for (i = 0; i < com->size; i++) { | |
259 | memcpy(&comval, com_nthval(com, i), sizeof(u_int32_t)); | |
260 | comval = ntohl(comval); | |
261 | ||
262 | if (first) | |
263 | first = 0; | |
264 | else | |
265 | *pnt++ = ' '; | |
266 | ||
267 | switch (comval) { | |
268 | case COMMUNITY_INTERNET: | |
269 | strcpy(pnt, "internet"); | |
270 | pnt += strlen("internet"); | |
271 | json_string = json_object_new_string("internet"); | |
272 | json_object_array_add(json_community_list, json_string); | |
273 | break; | |
274 | case COMMUNITY_NO_EXPORT: | |
275 | strcpy(pnt, "no-export"); | |
276 | pnt += strlen("no-export"); | |
277 | json_string = json_object_new_string("noExport"); | |
278 | json_object_array_add(json_community_list, json_string); | |
279 | break; | |
280 | case COMMUNITY_NO_ADVERTISE: | |
281 | strcpy(pnt, "no-advertise"); | |
282 | pnt += strlen("no-advertise"); | |
283 | json_string = json_object_new_string("noAdvertise"); | |
284 | json_object_array_add(json_community_list, json_string); | |
285 | break; | |
286 | case COMMUNITY_LOCAL_AS: | |
287 | strcpy(pnt, "local-AS"); | |
288 | pnt += strlen("local-AS"); | |
289 | json_string = json_object_new_string("localAs"); | |
290 | json_object_array_add(json_community_list, json_string); | |
291 | break; | |
292 | default: | |
293 | as = (comval >> 16) & 0xFFFF; | |
294 | val = comval & 0xFFFF; | |
295 | sprintf(pnt, "%u:%d", as, val); | |
296 | json_string = json_object_new_string(pnt); | |
297 | json_object_array_add(json_community_list, json_string); | |
298 | pnt += strlen(pnt); | |
299 | break; | |
300 | } | |
718e3744 | 301 | } |
d62a17ae | 302 | *pnt = '\0'; |
718e3744 | 303 | |
d62a17ae | 304 | json_object_string_add(com->json, "string", str); |
305 | json_object_object_add(com->json, "list", json_community_list); | |
306 | com->str = str; | |
718e3744 | 307 | } |
308 | ||
309 | /* Intern communities attribute. */ | |
d62a17ae | 310 | struct community *community_intern(struct community *com) |
718e3744 | 311 | { |
d62a17ae | 312 | struct community *find; |
718e3744 | 313 | |
d62a17ae | 314 | /* Assert this community structure is not interned. */ |
315 | assert(com->refcnt == 0); | |
718e3744 | 316 | |
d62a17ae | 317 | /* Lookup community hash. */ |
318 | find = (struct community *)hash_get(comhash, com, hash_alloc_intern); | |
718e3744 | 319 | |
d62a17ae | 320 | /* Arguemnt com is allocated temporary. So when it is not used in |
321 | hash, it should be freed. */ | |
322 | if (find != com) | |
323 | community_free(com); | |
718e3744 | 324 | |
d62a17ae | 325 | /* Increment refrence counter. */ |
326 | find->refcnt++; | |
718e3744 | 327 | |
d62a17ae | 328 | /* Make string. */ |
329 | if (!find->str) | |
330 | set_community_string(find); | |
718e3744 | 331 | |
d62a17ae | 332 | return find; |
718e3744 | 333 | } |
334 | ||
335 | /* Free community attribute. */ | |
d62a17ae | 336 | void community_unintern(struct community **com) |
718e3744 | 337 | { |
d62a17ae | 338 | struct community *ret; |
718e3744 | 339 | |
d62a17ae | 340 | if ((*com)->refcnt) |
341 | (*com)->refcnt--; | |
718e3744 | 342 | |
d62a17ae | 343 | /* Pull off from hash. */ |
344 | if ((*com)->refcnt == 0) { | |
345 | /* Community value com must exist in hash. */ | |
346 | ret = (struct community *)hash_release(comhash, *com); | |
347 | assert(ret != NULL); | |
718e3744 | 348 | |
d62a17ae | 349 | community_free(*com); |
350 | *com = NULL; | |
351 | } | |
718e3744 | 352 | } |
353 | ||
354 | /* Create new community attribute. */ | |
d62a17ae | 355 | struct community *community_parse(u_int32_t *pnt, u_short length) |
718e3744 | 356 | { |
d62a17ae | 357 | struct community tmp; |
358 | struct community *new; | |
718e3744 | 359 | |
d62a17ae | 360 | /* If length is malformed return NULL. */ |
361 | if (length % 4) | |
362 | return NULL; | |
718e3744 | 363 | |
d62a17ae | 364 | /* Make temporary community for hash look up. */ |
365 | tmp.size = length / 4; | |
366 | tmp.val = pnt; | |
718e3744 | 367 | |
d62a17ae | 368 | new = community_uniq_sort(&tmp); |
718e3744 | 369 | |
d62a17ae | 370 | return community_intern(new); |
718e3744 | 371 | } |
372 | ||
d62a17ae | 373 | struct community *community_dup(struct community *com) |
718e3744 | 374 | { |
d62a17ae | 375 | struct community *new; |
376 | ||
377 | new = XCALLOC(MTYPE_COMMUNITY, sizeof(struct community)); | |
378 | new->size = com->size; | |
379 | if (new->size) { | |
380 | new->val = XMALLOC(MTYPE_COMMUNITY_VAL, com->size * 4); | |
381 | memcpy(new->val, com->val, com->size * 4); | |
382 | } else | |
383 | new->val = NULL; | |
384 | return new; | |
718e3744 | 385 | } |
386 | ||
387 | /* Retrun string representation of communities attribute. */ | |
d62a17ae | 388 | char *community_str(struct community *com) |
718e3744 | 389 | { |
d62a17ae | 390 | if (!com) |
391 | return NULL; | |
f1aa5d8a | 392 | |
d62a17ae | 393 | if (!com->str) |
394 | set_community_string(com); | |
395 | return com->str; | |
718e3744 | 396 | } |
397 | ||
398 | /* Make hash value of community attribute. This function is used by | |
399 | hash package.*/ | |
d62a17ae | 400 | unsigned int community_hash_make(struct community *com) |
718e3744 | 401 | { |
d62a17ae | 402 | unsigned char *pnt = (unsigned char *)com->val; |
403 | int size = com->size * 4; | |
404 | unsigned int key = 0; | |
405 | int c; | |
406 | ||
407 | for (c = 0; c < size; c += 4) { | |
408 | key += pnt[c]; | |
409 | key += pnt[c + 1]; | |
410 | key += pnt[c + 2]; | |
411 | key += pnt[c + 3]; | |
412 | } | |
413 | ||
414 | return key; | |
718e3744 | 415 | } |
416 | ||
d62a17ae | 417 | int community_match(const struct community *com1, const struct community *com2) |
718e3744 | 418 | { |
d62a17ae | 419 | int i = 0; |
420 | int j = 0; | |
421 | ||
422 | if (com1 == NULL && com2 == NULL) | |
423 | return 1; | |
424 | ||
425 | if (com1 == NULL || com2 == NULL) | |
426 | return 0; | |
427 | ||
428 | if (com1->size < com2->size) | |
429 | return 0; | |
430 | ||
431 | /* Every community on com2 needs to be on com1 for this to match */ | |
432 | while (i < com1->size && j < com2->size) { | |
433 | if (memcmp(com1->val + i, com2->val + j, sizeof(u_int32_t)) | |
434 | == 0) | |
435 | j++; | |
436 | i++; | |
437 | } | |
438 | ||
439 | if (j == com2->size) | |
440 | return 1; | |
441 | else | |
442 | return 0; | |
718e3744 | 443 | } |
444 | ||
445 | /* If two aspath have same value then return 1 else return 0. This | |
446 | function is used by hash package. */ | |
d62a17ae | 447 | int community_cmp(const struct community *com1, const struct community *com2) |
718e3744 | 448 | { |
d62a17ae | 449 | if (com1 == NULL && com2 == NULL) |
450 | return 1; | |
451 | if (com1 == NULL || com2 == NULL) | |
452 | return 0; | |
453 | ||
454 | if (com1->size == com2->size) | |
455 | if (memcmp(com1->val, com2->val, com1->size * 4) == 0) | |
456 | return 1; | |
457 | return 0; | |
718e3744 | 458 | } |
459 | ||
460 | /* Add com2 to the end of com1. */ | |
d62a17ae | 461 | struct community *community_merge(struct community *com1, |
462 | struct community *com2) | |
718e3744 | 463 | { |
d62a17ae | 464 | if (com1->val) |
465 | com1->val = XREALLOC(MTYPE_COMMUNITY_VAL, com1->val, | |
466 | (com1->size + com2->size) * 4); | |
467 | else | |
468 | com1->val = XMALLOC(MTYPE_COMMUNITY_VAL, | |
469 | (com1->size + com2->size) * 4); | |
718e3744 | 470 | |
d62a17ae | 471 | memcpy(com1->val + com1->size, com2->val, com2->size * 4); |
472 | com1->size += com2->size; | |
718e3744 | 473 | |
d62a17ae | 474 | return com1; |
718e3744 | 475 | } |
476 | ||
477 | /* Community token enum. */ | |
d62a17ae | 478 | enum community_token { |
479 | community_token_val, | |
480 | community_token_no_export, | |
481 | community_token_no_advertise, | |
482 | community_token_local_as, | |
483 | community_token_unknown | |
718e3744 | 484 | }; |
485 | ||
486 | /* Get next community token from string. */ | |
94f2b392 | 487 | static const char * |
d62a17ae | 488 | community_gettoken(const char *buf, enum community_token *token, u_int32_t *val) |
718e3744 | 489 | { |
d62a17ae | 490 | const char *p = buf; |
491 | ||
492 | /* Skip white space. */ | |
493 | while (isspace((int)*p)) | |
494 | p++; | |
495 | ||
496 | /* Check the end of the line. */ | |
497 | if (*p == '\0') | |
498 | return NULL; | |
499 | ||
500 | /* Well known community string check. */ | |
501 | if (isalpha((int)*p)) { | |
502 | if (strncmp(p, "internet", strlen("internet")) == 0) { | |
503 | *val = COMMUNITY_INTERNET; | |
504 | *token = community_token_no_export; | |
505 | p += strlen("internet"); | |
506 | return p; | |
507 | } | |
508 | if (strncmp(p, "no-export", strlen("no-export")) == 0) { | |
509 | *val = COMMUNITY_NO_EXPORT; | |
510 | *token = community_token_no_export; | |
511 | p += strlen("no-export"); | |
512 | return p; | |
513 | } | |
514 | if (strncmp(p, "no-advertise", strlen("no-advertise")) == 0) { | |
515 | *val = COMMUNITY_NO_ADVERTISE; | |
516 | *token = community_token_no_advertise; | |
517 | p += strlen("no-advertise"); | |
518 | return p; | |
519 | } | |
520 | if (strncmp(p, "local-AS", strlen("local-AS")) == 0) { | |
521 | *val = COMMUNITY_LOCAL_AS; | |
522 | *token = community_token_local_as; | |
523 | p += strlen("local-AS"); | |
524 | return p; | |
525 | } | |
526 | ||
527 | /* Unknown string. */ | |
528 | *token = community_token_unknown; | |
529 | return NULL; | |
718e3744 | 530 | } |
531 | ||
d62a17ae | 532 | /* Community value. */ |
533 | if (isdigit((int)*p)) { | |
534 | int separator = 0; | |
535 | int digit = 0; | |
536 | u_int32_t community_low = 0; | |
537 | u_int32_t community_high = 0; | |
538 | ||
539 | while (isdigit((int)*p) || *p == ':') { | |
540 | if (*p == ':') { | |
541 | if (separator) { | |
542 | *token = community_token_unknown; | |
543 | return NULL; | |
544 | } else { | |
545 | separator = 1; | |
546 | digit = 0; | |
547 | ||
548 | if (community_low > UINT16_MAX) { | |
549 | *token = | |
550 | community_token_unknown; | |
551 | return NULL; | |
552 | } | |
553 | ||
554 | community_high = community_low << 16; | |
555 | community_low = 0; | |
556 | } | |
557 | } else { | |
558 | digit = 1; | |
559 | community_low *= 10; | |
560 | community_low += (*p - '0'); | |
561 | } | |
562 | p++; | |
718e3744 | 563 | } |
d62a17ae | 564 | if (!digit) { |
565 | *token = community_token_unknown; | |
566 | return NULL; | |
567 | } | |
568 | ||
569 | if (community_low > UINT16_MAX) { | |
570 | *token = community_token_unknown; | |
571 | return NULL; | |
718e3744 | 572 | } |
859d388e | 573 | |
d62a17ae | 574 | *val = community_high + community_low; |
575 | *token = community_token_val; | |
576 | return p; | |
577 | } | |
578 | *token = community_token_unknown; | |
579 | return NULL; | |
718e3744 | 580 | } |
581 | ||
582 | /* convert string to community structure */ | |
d62a17ae | 583 | struct community *community_str2com(const char *str) |
718e3744 | 584 | { |
d62a17ae | 585 | struct community *com = NULL; |
586 | struct community *com_sort = NULL; | |
587 | u_int32_t val = 0; | |
588 | enum community_token token = community_token_unknown; | |
589 | ||
590 | do { | |
591 | str = community_gettoken(str, &token, &val); | |
592 | ||
593 | switch (token) { | |
594 | case community_token_val: | |
595 | case community_token_no_export: | |
596 | case community_token_no_advertise: | |
597 | case community_token_local_as: | |
598 | if (com == NULL) { | |
599 | com = community_new(); | |
600 | com->json = NULL; | |
601 | } | |
602 | community_add_val(com, val); | |
603 | break; | |
604 | case community_token_unknown: | |
605 | default: | |
606 | if (com) | |
607 | community_free(com); | |
608 | return NULL; | |
609 | } | |
610 | } while (str); | |
611 | ||
612 | if (!com) | |
613 | return NULL; | |
718e3744 | 614 | |
d62a17ae | 615 | com_sort = community_uniq_sort(com); |
616 | community_free(com); | |
718e3744 | 617 | |
d62a17ae | 618 | return com_sort; |
718e3744 | 619 | } |
620 | ||
621 | /* Return communities hash entry count. */ | |
d62a17ae | 622 | unsigned long community_count(void) |
718e3744 | 623 | { |
d62a17ae | 624 | return comhash->count; |
718e3744 | 625 | } |
626 | ||
627 | /* Return communities hash. */ | |
d62a17ae | 628 | struct hash *community_hash(void) |
718e3744 | 629 | { |
d62a17ae | 630 | return comhash; |
718e3744 | 631 | } |
632 | ||
633 | /* Initialize comminity related hash. */ | |
d62a17ae | 634 | void community_init(void) |
718e3744 | 635 | { |
d62a17ae | 636 | comhash = hash_create( |
637 | (unsigned int (*)(void *))community_hash_make, | |
638 | (int (*)(const void *, const void *))community_cmp, NULL); | |
718e3744 | 639 | } |
228da428 | 640 | |
d62a17ae | 641 | void community_finish(void) |
228da428 | 642 | { |
d62a17ae | 643 | hash_free(comhash); |
644 | comhash = NULL; | |
228da428 | 645 | } |