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Commit | Line | Data |
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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. */ | |
94f2b392 | 34 | static struct community * |
35 | community_new (void) | |
718e3744 | 36 | { |
37 | return (struct community *) XCALLOC (MTYPE_COMMUNITY, | |
38 | sizeof (struct community)); | |
39 | } | |
40 | ||
41 | /* Free communities value. */ | |
42 | void | |
43 | community_free (struct community *com) | |
44 | { | |
45 | if (com->val) | |
46 | XFREE (MTYPE_COMMUNITY_VAL, com->val); | |
47 | if (com->str) | |
48 | XFREE (MTYPE_COMMUNITY_STR, com->str); | |
f1aa5d8a DS |
49 | |
50 | if (com->json) | |
51 | { | |
52 | json_object_free(com->json); | |
53 | com->json = NULL; | |
54 | } | |
55 | ||
718e3744 | 56 | XFREE (MTYPE_COMMUNITY, com); |
57 | } | |
58 | ||
59 | /* Add one community value to the community. */ | |
94f2b392 | 60 | static void |
718e3744 | 61 | community_add_val (struct community *com, u_int32_t val) |
62 | { | |
63 | com->size++; | |
64 | if (com->val) | |
65 | com->val = XREALLOC (MTYPE_COMMUNITY_VAL, com->val, com_length (com)); | |
66 | else | |
67 | com->val = XMALLOC (MTYPE_COMMUNITY_VAL, com_length (com)); | |
68 | ||
69 | val = htonl (val); | |
70 | memcpy (com_lastval (com), &val, sizeof (u_int32_t)); | |
71 | } | |
72 | ||
73 | /* Delete one community. */ | |
74 | void | |
75 | community_del_val (struct community *com, u_int32_t *val) | |
76 | { | |
77 | int i = 0; | |
78 | int c = 0; | |
79 | ||
80 | if (! com->val) | |
81 | return; | |
82 | ||
83 | while (i < com->size) | |
84 | { | |
85 | if (memcmp (com->val + i, val, sizeof (u_int32_t)) == 0) | |
86 | { | |
87 | c = com->size -i -1; | |
88 | ||
89 | if (c > 0) | |
4c005e3f | 90 | memmove (com->val + i, com->val + (i + 1), c * sizeof (*val)); |
718e3744 | 91 | |
92 | com->size--; | |
93 | ||
94 | if (com->size > 0) | |
95 | com->val = XREALLOC (MTYPE_COMMUNITY_VAL, com->val, | |
96 | com_length (com)); | |
97 | else | |
98 | { | |
99 | XFREE (MTYPE_COMMUNITY_VAL, com->val); | |
100 | com->val = NULL; | |
101 | } | |
102 | return; | |
103 | } | |
104 | i++; | |
105 | } | |
106 | } | |
107 | ||
108 | /* Delete all communities listed in com2 from com1 */ | |
109 | struct community * | |
110 | community_delete (struct community *com1, struct community *com2) | |
111 | { | |
112 | int i = 0; | |
113 | ||
114 | while(i < com2->size) | |
115 | { | |
116 | community_del_val (com1, com2->val + i); | |
117 | i++; | |
118 | } | |
119 | ||
120 | return com1; | |
121 | } | |
122 | ||
123 | /* Callback function from qsort(). */ | |
94f2b392 | 124 | static int |
718e3744 | 125 | community_compare (const void *a1, const void *a2) |
126 | { | |
127 | u_int32_t v1; | |
128 | u_int32_t v2; | |
129 | ||
130 | memcpy (&v1, a1, sizeof (u_int32_t)); | |
131 | memcpy (&v2, a2, sizeof (u_int32_t)); | |
132 | v1 = ntohl (v1); | |
133 | v2 = ntohl (v2); | |
134 | ||
135 | if (v1 < v2) | |
136 | return -1; | |
137 | if (v1 > v2) | |
138 | return 1; | |
139 | return 0; | |
140 | } | |
141 | ||
142 | int | |
143 | community_include (struct community *com, u_int32_t val) | |
144 | { | |
145 | int i; | |
146 | ||
147 | val = htonl (val); | |
148 | ||
149 | for (i = 0; i < com->size; i++) | |
150 | if (memcmp (&val, com_nthval (com, i), sizeof (u_int32_t)) == 0) | |
151 | return 1; | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
5cbea288 | 156 | u_int32_t |
718e3744 | 157 | community_val_get (struct community *com, int i) |
158 | { | |
159 | u_char *p; | |
160 | u_int32_t val; | |
161 | ||
162 | p = (u_char *) com->val; | |
163 | p += (i * 4); | |
164 | ||
165 | memcpy (&val, p, sizeof (u_int32_t)); | |
166 | ||
167 | return ntohl (val); | |
168 | } | |
169 | ||
170 | /* Sort and uniq given community. */ | |
171 | struct community * | |
172 | community_uniq_sort (struct community *com) | |
173 | { | |
174 | int i; | |
175 | struct community *new; | |
176 | u_int32_t val; | |
177 | ||
178 | if (! com) | |
179 | return NULL; | |
180 | ||
181 | new = community_new ();; | |
f1aa5d8a | 182 | new->json = NULL; |
718e3744 | 183 | |
184 | for (i = 0; i < com->size; i++) | |
185 | { | |
186 | val = community_val_get (com, i); | |
187 | ||
188 | if (! community_include (new, val)) | |
189 | community_add_val (new, val); | |
190 | } | |
191 | ||
192 | qsort (new->val, new->size, sizeof (u_int32_t), community_compare); | |
193 | ||
194 | return new; | |
195 | } | |
196 | ||
197 | /* Convert communities attribute to string. | |
198 | ||
199 | For Well-known communities value, below keyword is used. | |
200 | ||
201 | 0x0 "internet" | |
202 | 0xFFFFFF01 "no-export" | |
203 | 0xFFFFFF02 "no-advertise" | |
204 | 0xFFFFFF03 "local-AS" | |
205 | ||
206 | For other values, "AS:VAL" format is used. */ | |
f1aa5d8a DS |
207 | static void |
208 | set_community_string (struct community *com) | |
718e3744 | 209 | { |
210 | int i; | |
211 | char *str; | |
212 | char *pnt; | |
213 | int len; | |
214 | int first; | |
215 | u_int32_t comval; | |
216 | u_int16_t as; | |
217 | u_int16_t val; | |
f1aa5d8a DS |
218 | json_object *json_community_list = NULL; |
219 | json_object *json_string = NULL; | |
718e3744 | 220 | |
b2ceea18 | 221 | if (!com) |
88177fe3 | 222 | return; |
b2ceea18 | 223 | |
f1aa5d8a DS |
224 | com->json = json_object_new_object(); |
225 | json_community_list = json_object_new_array(); | |
226 | ||
718e3744 | 227 | /* When communities attribute is empty. */ |
228 | if (com->size == 0) | |
229 | { | |
230 | str = XMALLOC (MTYPE_COMMUNITY_STR, 1); | |
231 | str[0] = '\0'; | |
f1aa5d8a DS |
232 | |
233 | json_object_string_add(com->json, "string", ""); | |
234 | json_object_object_add(com->json, "list", json_community_list); | |
235 | com->str = str; | |
236 | return; | |
718e3744 | 237 | } |
238 | ||
239 | /* Memory allocation is time consuming work. So we calculate | |
240 | required string length first. */ | |
241 | len = 0; | |
242 | ||
243 | for (i = 0; i < com->size; i++) | |
244 | { | |
245 | memcpy (&comval, com_nthval (com, i), sizeof (u_int32_t)); | |
246 | comval = ntohl (comval); | |
247 | ||
248 | switch (comval) | |
249 | { | |
250 | case COMMUNITY_INTERNET: | |
251 | len += strlen (" internet"); | |
252 | break; | |
253 | case COMMUNITY_NO_EXPORT: | |
254 | len += strlen (" no-export"); | |
255 | break; | |
256 | case COMMUNITY_NO_ADVERTISE: | |
257 | len += strlen (" no-advertise"); | |
258 | break; | |
259 | case COMMUNITY_LOCAL_AS: | |
260 | len += strlen (" local-AS"); | |
261 | break; | |
262 | default: | |
263 | len += strlen (" 65536:65535"); | |
264 | break; | |
265 | } | |
266 | } | |
267 | ||
268 | /* Allocate memory. */ | |
269 | str = pnt = XMALLOC (MTYPE_COMMUNITY_STR, len); | |
270 | first = 1; | |
271 | ||
272 | /* Fill in string. */ | |
273 | for (i = 0; i < com->size; i++) | |
274 | { | |
275 | memcpy (&comval, com_nthval (com, i), sizeof (u_int32_t)); | |
276 | comval = ntohl (comval); | |
277 | ||
278 | if (first) | |
279 | first = 0; | |
280 | else | |
281 | *pnt++ = ' '; | |
282 | ||
283 | switch (comval) | |
284 | { | |
285 | case COMMUNITY_INTERNET: | |
286 | strcpy (pnt, "internet"); | |
287 | pnt += strlen ("internet"); | |
f1aa5d8a DS |
288 | json_string = json_object_new_string("internet"); |
289 | json_object_array_add(json_community_list, json_string); | |
718e3744 | 290 | break; |
291 | case COMMUNITY_NO_EXPORT: | |
292 | strcpy (pnt, "no-export"); | |
293 | pnt += strlen ("no-export"); | |
62d6dca0 | 294 | json_string = json_object_new_string("noExport"); |
f1aa5d8a | 295 | json_object_array_add(json_community_list, json_string); |
718e3744 | 296 | break; |
297 | case COMMUNITY_NO_ADVERTISE: | |
298 | strcpy (pnt, "no-advertise"); | |
299 | pnt += strlen ("no-advertise"); | |
62d6dca0 | 300 | json_string = json_object_new_string("noAdvertise"); |
f1aa5d8a | 301 | json_object_array_add(json_community_list, json_string); |
718e3744 | 302 | break; |
303 | case COMMUNITY_LOCAL_AS: | |
304 | strcpy (pnt, "local-AS"); | |
305 | pnt += strlen ("local-AS"); | |
62d6dca0 | 306 | json_string = json_object_new_string("localAs"); |
f1aa5d8a | 307 | json_object_array_add(json_community_list, json_string); |
718e3744 | 308 | break; |
309 | default: | |
310 | as = (comval >> 16) & 0xFFFF; | |
311 | val = comval & 0xFFFF; | |
aea339f7 | 312 | sprintf (pnt, "%u:%d", as, val); |
f1aa5d8a DS |
313 | json_string = json_object_new_string(pnt); |
314 | json_object_array_add(json_community_list, json_string); | |
718e3744 | 315 | pnt += strlen (pnt); |
316 | break; | |
317 | } | |
318 | } | |
319 | *pnt = '\0'; | |
320 | ||
f1aa5d8a DS |
321 | json_object_string_add(com->json, "string", str); |
322 | json_object_object_add(com->json, "list", json_community_list); | |
323 | com->str = str; | |
718e3744 | 324 | } |
325 | ||
326 | /* Intern communities attribute. */ | |
327 | struct community * | |
328 | community_intern (struct community *com) | |
329 | { | |
330 | struct community *find; | |
331 | ||
332 | /* Assert this community structure is not interned. */ | |
333 | assert (com->refcnt == 0); | |
334 | ||
335 | /* Lookup community hash. */ | |
336 | find = (struct community *) hash_get (comhash, com, hash_alloc_intern); | |
337 | ||
338 | /* Arguemnt com is allocated temporary. So when it is not used in | |
339 | hash, it should be freed. */ | |
340 | if (find != com) | |
341 | community_free (com); | |
342 | ||
343 | /* Increment refrence counter. */ | |
344 | find->refcnt++; | |
345 | ||
346 | /* Make string. */ | |
347 | if (! find->str) | |
f1aa5d8a | 348 | set_community_string (find); |
718e3744 | 349 | |
350 | return find; | |
351 | } | |
352 | ||
353 | /* Free community attribute. */ | |
354 | void | |
f6f434b2 | 355 | community_unintern (struct community **com) |
718e3744 | 356 | { |
357 | struct community *ret; | |
358 | ||
f6f434b2 PJ |
359 | if ((*com)->refcnt) |
360 | (*com)->refcnt--; | |
718e3744 | 361 | |
362 | /* Pull off from hash. */ | |
f6f434b2 | 363 | if ((*com)->refcnt == 0) |
718e3744 | 364 | { |
365 | /* Community value com must exist in hash. */ | |
f6f434b2 | 366 | ret = (struct community *) hash_release (comhash, *com); |
718e3744 | 367 | assert (ret != NULL); |
368 | ||
f6f434b2 PJ |
369 | community_free (*com); |
370 | *com = NULL; | |
718e3744 | 371 | } |
372 | } | |
373 | ||
374 | /* Create new community attribute. */ | |
375 | struct community * | |
5228ad27 | 376 | community_parse (u_int32_t *pnt, u_short length) |
718e3744 | 377 | { |
378 | struct community tmp; | |
379 | struct community *new; | |
380 | ||
381 | /* If length is malformed return NULL. */ | |
382 | if (length % 4) | |
383 | return NULL; | |
384 | ||
385 | /* Make temporary community for hash look up. */ | |
386 | tmp.size = length / 4; | |
5228ad27 | 387 | tmp.val = pnt; |
718e3744 | 388 | |
389 | new = community_uniq_sort (&tmp); | |
390 | ||
391 | return community_intern (new); | |
392 | } | |
393 | ||
394 | struct community * | |
395 | community_dup (struct community *com) | |
396 | { | |
397 | struct community *new; | |
398 | ||
399 | new = XCALLOC (MTYPE_COMMUNITY, sizeof (struct community)); | |
400 | new->size = com->size; | |
401 | if (new->size) | |
402 | { | |
403 | new->val = XMALLOC (MTYPE_COMMUNITY_VAL, com->size * 4); | |
404 | memcpy (new->val, com->val, com->size * 4); | |
405 | } | |
406 | else | |
407 | new->val = NULL; | |
408 | return new; | |
409 | } | |
410 | ||
411 | /* Retrun string representation of communities attribute. */ | |
412 | char * | |
413 | community_str (struct community *com) | |
414 | { | |
b2ceea18 PJ |
415 | if (!com) |
416 | return NULL; | |
f1aa5d8a | 417 | |
718e3744 | 418 | if (! com->str) |
f1aa5d8a | 419 | set_community_string (com); |
718e3744 | 420 | return com->str; |
421 | } | |
422 | ||
423 | /* Make hash value of community attribute. This function is used by | |
424 | hash package.*/ | |
425 | unsigned int | |
426 | community_hash_make (struct community *com) | |
427 | { | |
c76275ee JBD |
428 | unsigned char *pnt = (unsigned char *)com->val; |
429 | int size = com->size * 4; | |
430 | unsigned int key = 0; | |
718e3744 | 431 | int c; |
718e3744 | 432 | |
c76275ee JBD |
433 | for (c = 0; c < size; c += 4) |
434 | { | |
435 | key += pnt[c]; | |
436 | key += pnt[c + 1]; | |
437 | key += pnt[c + 2]; | |
438 | key += pnt[c + 3]; | |
439 | } | |
440 | ||
718e3744 | 441 | return key; |
442 | } | |
443 | ||
444 | int | |
fd79ac91 | 445 | community_match (const struct community *com1, const struct community *com2) |
718e3744 | 446 | { |
447 | int i = 0; | |
448 | int j = 0; | |
449 | ||
450 | if (com1 == NULL && com2 == NULL) | |
451 | return 1; | |
452 | ||
453 | if (com1 == NULL || com2 == NULL) | |
454 | return 0; | |
455 | ||
456 | if (com1->size < com2->size) | |
457 | return 0; | |
458 | ||
459 | /* Every community on com2 needs to be on com1 for this to match */ | |
460 | while (i < com1->size && j < com2->size) | |
461 | { | |
462 | if (memcmp (com1->val + i, com2->val + j, sizeof (u_int32_t)) == 0) | |
463 | j++; | |
464 | i++; | |
465 | } | |
466 | ||
467 | if (j == com2->size) | |
468 | return 1; | |
469 | else | |
470 | return 0; | |
471 | } | |
472 | ||
473 | /* If two aspath have same value then return 1 else return 0. This | |
474 | function is used by hash package. */ | |
475 | int | |
fd79ac91 | 476 | community_cmp (const struct community *com1, const struct community *com2) |
718e3744 | 477 | { |
478 | if (com1 == NULL && com2 == NULL) | |
479 | return 1; | |
480 | if (com1 == NULL || com2 == NULL) | |
481 | return 0; | |
482 | ||
483 | if (com1->size == com2->size) | |
484 | if (memcmp (com1->val, com2->val, com1->size * 4) == 0) | |
485 | return 1; | |
486 | return 0; | |
487 | } | |
488 | ||
489 | /* Add com2 to the end of com1. */ | |
490 | struct community * | |
491 | community_merge (struct community *com1, struct community *com2) | |
492 | { | |
493 | if (com1->val) | |
494 | com1->val = XREALLOC (MTYPE_COMMUNITY_VAL, com1->val, | |
495 | (com1->size + com2->size) * 4); | |
496 | else | |
497 | com1->val = XMALLOC (MTYPE_COMMUNITY_VAL, (com1->size + com2->size) * 4); | |
498 | ||
499 | memcpy (com1->val + com1->size, com2->val, com2->size * 4); | |
500 | com1->size += com2->size; | |
501 | ||
502 | return com1; | |
503 | } | |
504 | ||
505 | /* Community token enum. */ | |
506 | enum community_token | |
507 | { | |
508 | community_token_val, | |
509 | community_token_no_export, | |
510 | community_token_no_advertise, | |
511 | community_token_local_as, | |
512 | community_token_unknown | |
513 | }; | |
514 | ||
515 | /* Get next community token from string. */ | |
94f2b392 | 516 | static const char * |
fd79ac91 | 517 | community_gettoken (const char *buf, enum community_token *token, |
518 | u_int32_t *val) | |
718e3744 | 519 | { |
fd79ac91 | 520 | const char *p = buf; |
718e3744 | 521 | |
522 | /* Skip white space. */ | |
523 | while (isspace ((int) *p)) | |
524 | p++; | |
525 | ||
526 | /* Check the end of the line. */ | |
527 | if (*p == '\0') | |
528 | return NULL; | |
529 | ||
530 | /* Well known community string check. */ | |
531 | if (isalpha ((int) *p)) | |
532 | { | |
533 | if (strncmp (p, "internet", strlen ("internet")) == 0) | |
534 | { | |
535 | *val = COMMUNITY_INTERNET; | |
536 | *token = community_token_no_export; | |
537 | p += strlen ("internet"); | |
538 | return p; | |
539 | } | |
540 | if (strncmp (p, "no-export", strlen ("no-export")) == 0) | |
541 | { | |
542 | *val = COMMUNITY_NO_EXPORT; | |
543 | *token = community_token_no_export; | |
544 | p += strlen ("no-export"); | |
545 | return p; | |
546 | } | |
547 | if (strncmp (p, "no-advertise", strlen ("no-advertise")) == 0) | |
548 | { | |
549 | *val = COMMUNITY_NO_ADVERTISE; | |
550 | *token = community_token_no_advertise; | |
551 | p += strlen ("no-advertise"); | |
552 | return p; | |
553 | } | |
554 | if (strncmp (p, "local-AS", strlen ("local-AS")) == 0) | |
555 | { | |
556 | *val = COMMUNITY_LOCAL_AS; | |
557 | *token = community_token_local_as; | |
558 | p += strlen ("local-AS"); | |
559 | return p; | |
560 | } | |
561 | ||
562 | /* Unknown string. */ | |
563 | *token = community_token_unknown; | |
15aa6a1a | 564 | return NULL; |
718e3744 | 565 | } |
566 | ||
567 | /* Community value. */ | |
568 | if (isdigit ((int) *p)) | |
569 | { | |
570 | int separator = 0; | |
571 | int digit = 0; | |
572 | u_int32_t community_low = 0; | |
573 | u_int32_t community_high = 0; | |
574 | ||
575 | while (isdigit ((int) *p) || *p == ':') | |
576 | { | |
577 | if (*p == ':') | |
578 | { | |
579 | if (separator) | |
580 | { | |
581 | *token = community_token_unknown; | |
15aa6a1a | 582 | return NULL; |
718e3744 | 583 | } |
584 | else | |
585 | { | |
586 | separator = 1; | |
587 | digit = 0; | |
859d388e DW |
588 | |
589 | if (community_low > UINT16_MAX) | |
590 | { | |
591 | *token = community_token_unknown; | |
592 | return NULL; | |
593 | } | |
594 | ||
718e3744 | 595 | community_high = community_low << 16; |
596 | community_low = 0; | |
597 | } | |
598 | } | |
599 | else | |
600 | { | |
601 | digit = 1; | |
602 | community_low *= 10; | |
603 | community_low += (*p - '0'); | |
604 | } | |
605 | p++; | |
606 | } | |
607 | if (! digit) | |
608 | { | |
609 | *token = community_token_unknown; | |
15aa6a1a | 610 | return NULL; |
718e3744 | 611 | } |
859d388e DW |
612 | |
613 | if (community_low > UINT16_MAX) | |
614 | { | |
615 | *token = community_token_unknown; | |
616 | return NULL; | |
617 | } | |
618 | ||
718e3744 | 619 | *val = community_high + community_low; |
620 | *token = community_token_val; | |
621 | return p; | |
622 | } | |
623 | *token = community_token_unknown; | |
15aa6a1a | 624 | return NULL; |
718e3744 | 625 | } |
626 | ||
627 | /* convert string to community structure */ | |
628 | struct community * | |
fd79ac91 | 629 | community_str2com (const char *str) |
718e3744 | 630 | { |
631 | struct community *com = NULL; | |
632 | struct community *com_sort = NULL; | |
851a1a5c PJ |
633 | u_int32_t val = 0; |
634 | enum community_token token = community_token_unknown; | |
718e3744 | 635 | |
15aa6a1a | 636 | do |
718e3744 | 637 | { |
15aa6a1a PJ |
638 | str = community_gettoken (str, &token, &val); |
639 | ||
718e3744 | 640 | switch (token) |
641 | { | |
642 | case community_token_val: | |
643 | case community_token_no_export: | |
644 | case community_token_no_advertise: | |
645 | case community_token_local_as: | |
646 | if (com == NULL) | |
f1aa5d8a DS |
647 | { |
648 | com = community_new(); | |
649 | com->json = NULL; | |
650 | } | |
718e3744 | 651 | community_add_val (com, val); |
652 | break; | |
653 | case community_token_unknown: | |
654 | default: | |
655 | if (com) | |
656 | community_free (com); | |
542bcb72 | 657 | return NULL; |
718e3744 | 658 | } |
15aa6a1a | 659 | } while (str); |
718e3744 | 660 | |
661 | if (! com) | |
662 | return NULL; | |
663 | ||
664 | com_sort = community_uniq_sort (com); | |
665 | community_free (com); | |
666 | ||
667 | return com_sort; | |
668 | } | |
669 | ||
670 | /* Return communities hash entry count. */ | |
671 | unsigned long | |
66e5cd87 | 672 | community_count (void) |
718e3744 | 673 | { |
674 | return comhash->count; | |
675 | } | |
676 | ||
677 | /* Return communities hash. */ | |
678 | struct hash * | |
94f2b392 | 679 | community_hash (void) |
718e3744 | 680 | { |
681 | return comhash; | |
682 | } | |
683 | ||
684 | /* Initialize comminity related hash. */ | |
685 | void | |
94f2b392 | 686 | community_init (void) |
718e3744 | 687 | { |
ffe11cfb SH |
688 | comhash = hash_create ((unsigned int (*) (void *))community_hash_make, |
689 | (int (*) (const void *, const void *))community_cmp); | |
718e3744 | 690 | } |
228da428 CC |
691 | |
692 | void | |
693 | community_finish (void) | |
694 | { | |
695 | hash_free (comhash); | |
696 | comhash = NULL; | |
697 | } |