1 /* Community attribute related functions.
2 * Copyright (C) 1998, 2001 Kunihiro Ishiguro
4 * This file is part of GNU Zebra.
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
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.
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
29 #include "bgpd/bgp_memory.h"
30 #include "bgpd/bgp_community.h"
31 #include "bgpd/bgp_community_alias.h"
33 /* Hash of community attribute. */
34 static struct hash
*comhash
;
36 /* Allocate a new communities value. */
37 static struct community
*community_new(void)
39 return XCALLOC(MTYPE_COMMUNITY
, sizeof(struct community
));
42 /* Free communities value. */
43 void community_free(struct community
**com
)
48 XFREE(MTYPE_COMMUNITY_VAL
, (*com
)->val
);
49 XFREE(MTYPE_COMMUNITY_STR
, (*com
)->str
);
52 json_object_free((*com
)->json
);
56 XFREE(MTYPE_COMMUNITY
, (*com
));
59 /* Add one community value to the community. */
60 void community_add_val(struct community
*com
, uint32_t val
)
63 com
->val
= XREALLOC(MTYPE_COMMUNITY_VAL
, com
->val
, com_length(com
));
66 memcpy(com_lastval(com
), &val
, sizeof(uint32_t));
69 /* Delete one community. */
70 void community_del_val(struct community
*com
, uint32_t *val
)
78 while (i
< com
->size
) {
79 if (memcmp(com
->val
+ i
, val
, sizeof(uint32_t)) == 0) {
80 c
= com
->size
- i
- 1;
83 memmove(com
->val
+ i
, com
->val
+ (i
+ 1),
89 com
->val
= XREALLOC(MTYPE_COMMUNITY_VAL
,
90 com
->val
, com_length(com
));
92 XFREE(MTYPE_COMMUNITY_VAL
, com
->val
);
100 /* Delete all communities listed in com2 from com1 */
101 struct community
*community_delete(struct community
*com1
,
102 struct community
*com2
)
106 while (i
< com2
->size
) {
107 community_del_val(com1
, com2
->val
+ i
);
114 /* Callback function from qsort(). */
115 static int community_compare(const void *a1
, const void *a2
)
120 memcpy(&v1
, a1
, sizeof(uint32_t));
121 memcpy(&v2
, a2
, sizeof(uint32_t));
132 bool community_include(struct community
*com
, uint32_t val
)
138 for (i
= 0; i
< com
->size
; i
++)
139 if (memcmp(&val
, com_nthval(com
, i
), sizeof(uint32_t)) == 0)
144 uint32_t community_val_get(struct community
*com
, int i
)
149 p
= (uint8_t *)com
->val
;
150 p
+= (i
* COMMUNITY_SIZE
);
152 memcpy(&val
, p
, sizeof(uint32_t));
157 /* Sort and uniq given community. */
158 struct community
*community_uniq_sort(struct community
*com
)
161 struct community
*new;
167 new = community_new();
170 for (i
= 0; i
< com
->size
; i
++) {
171 val
= community_val_get(com
, i
);
173 if (!community_include(new, val
))
174 community_add_val(new, val
);
177 qsort(new->val
, new->size
, sizeof(uint32_t), community_compare
);
182 /* Convert communities attribute to string.
184 For Well-known communities value, below keyword is used.
187 0xFFFF0000 "graceful-shutdown"
188 0xFFFF0001 "accept-own"
189 0xFFFF0002 "route-filter-translated-v4"
190 0xFFFF0003 "route-filter-v4"
191 0xFFFF0004 "route-filter-translated-v6"
192 0xFFFF0005 "route-filter-v6"
193 0xFFFF0006 "llgr-stale"
195 0xFFFF0008 "accept-own-nexthop"
196 0xFFFF029A "blackhole"
197 0xFFFFFF01 "no-export"
198 0xFFFFFF02 "no-advertise"
199 0xFFFFFF03 "local-AS"
202 For other values, "AS:VAL" format is used. */
203 static void set_community_string(struct community
*com
, bool make_json
)
212 json_object
*json_community_list
= NULL
;
213 json_object
*json_string
= NULL
;
219 com
->json
= json_object_new_object();
220 json_community_list
= json_object_new_array();
223 /* When communities attribute is empty. */
224 if (com
->size
== 0) {
225 str
= XMALLOC(MTYPE_COMMUNITY_STR
, 1);
229 json_object_string_add(com
->json
, "string", "");
230 json_object_object_add(com
->json
, "list",
231 json_community_list
);
237 /* Memory allocation is time consuming work. So we calculate
238 required string length first. */
241 for (i
= 0; i
< com
->size
; i
++) {
242 memcpy(&comval
, com_nthval(com
, i
), sizeof(uint32_t));
243 comval
= ntohl(comval
);
246 case COMMUNITY_INTERNET
:
247 len
+= strlen(" internet");
249 case COMMUNITY_GSHUT
:
250 len
+= strlen(" graceful-shutdown");
252 case COMMUNITY_ACCEPT_OWN
:
253 len
+= strlen(" accept-own");
255 case COMMUNITY_ROUTE_FILTER_TRANSLATED_v4
:
256 len
+= strlen(" route-filter-translated-v4");
258 case COMMUNITY_ROUTE_FILTER_v4
:
259 len
+= strlen(" route-filter-v4");
261 case COMMUNITY_ROUTE_FILTER_TRANSLATED_v6
:
262 len
+= strlen(" route-filter-translated-v6");
264 case COMMUNITY_ROUTE_FILTER_v6
:
265 len
+= strlen(" route-filter-v6");
267 case COMMUNITY_LLGR_STALE
:
268 len
+= strlen(" llgr-stale");
270 case COMMUNITY_NO_LLGR
:
271 len
+= strlen(" no-llgr");
273 case COMMUNITY_ACCEPT_OWN_NEXTHOP
:
274 len
+= strlen(" accept-own-nexthop");
276 case COMMUNITY_BLACKHOLE
:
277 len
+= strlen(" blackhole");
279 case COMMUNITY_NO_EXPORT
:
280 len
+= strlen(" no-export");
282 case COMMUNITY_NO_ADVERTISE
:
283 len
+= strlen(" no-advertise");
285 case COMMUNITY_LOCAL_AS
:
286 len
+= strlen(" local-AS");
288 case COMMUNITY_NO_PEER
:
289 len
+= strlen(" no-peer");
297 /* Allocate memory. */
298 str
= XCALLOC(MTYPE_COMMUNITY_STR
, len
);
301 /* Fill in string. */
302 for (i
= 0; i
< com
->size
; i
++) {
303 memcpy(&comval
, com_nthval(com
, i
), sizeof(uint32_t));
304 comval
= ntohl(comval
);
309 strlcat(str
, " ", len
);
312 case COMMUNITY_INTERNET
:
313 strlcat(str
, "internet", len
);
316 json_object_new_string("internet");
317 json_object_array_add(json_community_list
,
321 case COMMUNITY_GSHUT
:
322 strlcat(str
, "graceful-shutdown", len
);
324 json_string
= json_object_new_string(
326 json_object_array_add(json_community_list
,
330 case COMMUNITY_ACCEPT_OWN
:
331 strlcat(str
, "accept-own", len
);
333 json_string
= json_object_new_string(
335 json_object_array_add(json_community_list
,
339 case COMMUNITY_ROUTE_FILTER_TRANSLATED_v4
:
340 strlcat(str
, "route-filter-translated-v4", len
);
342 json_string
= json_object_new_string(
343 "routeFilterTranslatedV4");
344 json_object_array_add(json_community_list
,
348 case COMMUNITY_ROUTE_FILTER_v4
:
349 strlcat(str
, "route-filter-v4", len
);
351 json_string
= json_object_new_string(
353 json_object_array_add(json_community_list
,
357 case COMMUNITY_ROUTE_FILTER_TRANSLATED_v6
:
358 strlcat(str
, "route-filter-translated-v6", len
);
360 json_string
= json_object_new_string(
361 "routeFilterTranslatedV6");
362 json_object_array_add(json_community_list
,
366 case COMMUNITY_ROUTE_FILTER_v6
:
367 strlcat(str
, "route-filter-v6", len
);
369 json_string
= json_object_new_string(
371 json_object_array_add(json_community_list
,
375 case COMMUNITY_LLGR_STALE
:
376 strlcat(str
, "llgr-stale", len
);
378 json_string
= json_object_new_string(
380 json_object_array_add(json_community_list
,
384 case COMMUNITY_NO_LLGR
:
385 strlcat(str
, "no-llgr", len
);
387 json_string
= json_object_new_string(
389 json_object_array_add(json_community_list
,
393 case COMMUNITY_ACCEPT_OWN_NEXTHOP
:
394 strlcat(str
, "accept-own-nexthop", len
);
396 json_string
= json_object_new_string(
398 json_object_array_add(json_community_list
,
402 case COMMUNITY_BLACKHOLE
:
403 strlcat(str
, "blackhole", len
);
405 json_string
= json_object_new_string(
407 json_object_array_add(json_community_list
,
411 case COMMUNITY_NO_EXPORT
:
412 strlcat(str
, "no-export", len
);
415 json_object_new_string("noExport");
416 json_object_array_add(json_community_list
,
420 case COMMUNITY_NO_ADVERTISE
:
421 strlcat(str
, "no-advertise", len
);
424 json_object_new_string("noAdvertise");
425 json_object_array_add(json_community_list
,
429 case COMMUNITY_LOCAL_AS
:
430 strlcat(str
, "local-AS", len
);
432 json_string
= json_object_new_string("localAs");
433 json_object_array_add(json_community_list
,
437 case COMMUNITY_NO_PEER
:
438 strlcat(str
, "no-peer", len
);
440 json_string
= json_object_new_string("noPeer");
441 json_object_array_add(json_community_list
,
446 as
= (comval
>> 16) & 0xFFFF;
447 val
= comval
& 0xFFFF;
449 snprintf(buf
, sizeof(buf
), "%u:%d", as
, val
);
450 const char *com2alias
= bgp_community2alias(buf
);
452 strlcat(str
, com2alias
, len
);
454 json_string
= json_object_new_string(com2alias
);
455 json_object_array_add(json_community_list
,
463 json_object_string_add(com
->json
, "string", str
);
464 json_object_object_add(com
->json
, "list", json_community_list
);
469 /* Intern communities attribute. */
470 struct community
*community_intern(struct community
*com
)
472 struct community
*find
;
474 /* Assert this community structure is not interned. */
475 assert(com
->refcnt
== 0);
477 /* Lookup community hash. */
478 find
= (struct community
*)hash_get(comhash
, com
, hash_alloc_intern
);
480 /* Arguemnt com is allocated temporary. So when it is not used in
481 hash, it should be freed. */
483 community_free(&com
);
485 /* Increment refrence counter. */
490 set_community_string(find
, false);
495 /* Free community attribute. */
496 void community_unintern(struct community
**com
)
498 struct community
*ret
;
506 /* Pull off from hash. */
507 if ((*com
)->refcnt
== 0) {
508 /* Community value com must exist in hash. */
509 ret
= (struct community
*)hash_release(comhash
, *com
);
516 /* Create new community attribute. */
517 struct community
*community_parse(uint32_t *pnt
, unsigned short length
)
519 struct community tmp
;
520 struct community
*new;
522 /* If length is malformed return NULL. */
523 if (length
% COMMUNITY_SIZE
)
526 /* Make temporary community for hash look up. */
527 tmp
.size
= length
/ COMMUNITY_SIZE
;
530 new = community_uniq_sort(&tmp
);
532 return community_intern(new);
535 struct community
*community_dup(struct community
*com
)
537 struct community
*new;
539 new = XCALLOC(MTYPE_COMMUNITY
, sizeof(struct community
));
540 new->size
= com
->size
;
542 new->val
= XMALLOC(MTYPE_COMMUNITY_VAL
,
543 com
->size
* COMMUNITY_SIZE
);
544 memcpy(new->val
, com
->val
, com
->size
* COMMUNITY_SIZE
);
550 /* Return string representation of communities attribute. */
551 char *community_str(struct community
*com
, bool make_json
)
556 if (make_json
&& !com
->json
&& com
->str
)
557 XFREE(MTYPE_COMMUNITY_STR
, com
->str
);
560 set_community_string(com
, make_json
);
564 /* Make hash value of community attribute. This function is used by
566 unsigned int community_hash_make(const struct community
*com
)
568 uint32_t *pnt
= com
->val
;
570 return jhash2(pnt
, com
->size
, 0x43ea96c1);
573 bool community_match(const struct community
*com1
, const struct community
*com2
)
578 if (com1
== NULL
&& com2
== NULL
)
581 if (com1
== NULL
|| com2
== NULL
)
584 if (com1
->size
< com2
->size
)
587 /* Every community on com2 needs to be on com1 for this to match */
588 while (i
< com1
->size
&& j
< com2
->size
) {
589 if (memcmp(com1
->val
+ i
, com2
->val
+ j
, sizeof(uint32_t)) == 0)
600 bool community_cmp(const struct community
*com1
, const struct community
*com2
)
602 if (com1
== NULL
&& com2
== NULL
)
604 if (com1
== NULL
|| com2
== NULL
)
607 if (com1
->size
== com2
->size
)
608 if (memcmp(com1
->val
, com2
->val
, com1
->size
* COMMUNITY_SIZE
)
614 /* Add com2 to the end of com1. */
615 struct community
*community_merge(struct community
*com1
,
616 struct community
*com2
)
618 com1
->val
= XREALLOC(MTYPE_COMMUNITY_VAL
, com1
->val
,
619 (com1
->size
+ com2
->size
) * COMMUNITY_SIZE
);
621 memcpy(com1
->val
+ com1
->size
, com2
->val
, com2
->size
* COMMUNITY_SIZE
);
622 com1
->size
+= com2
->size
;
627 /* Community token enum. */
628 enum community_token
{
630 community_token_gshut
,
631 community_token_accept_own
,
632 community_token_route_filter_translated_v4
,
633 community_token_route_filter_v4
,
634 community_token_route_filter_translated_v6
,
635 community_token_route_filter_v6
,
636 community_token_llgr_stale
,
637 community_token_no_llgr
,
638 community_token_accept_own_nexthop
,
639 community_token_blackhole
,
640 community_token_no_export
,
641 community_token_no_advertise
,
642 community_token_local_as
,
643 community_token_no_peer
,
644 community_token_unknown
647 /* Helper to check if a given community is valid */
648 static bool community_valid(const char *community
)
655 frrstr_split(community
, ":", &splits
, &num
);
657 for (int i
= 0; i
< num
; i
++) {
658 if (strtoul(splits
[i
], NULL
, 10) > UINT16_MAX
)
661 if (strlen(splits
[i
]) == 0)
665 XFREE(MTYPE_TMP
, splits
[i
]);
667 XFREE(MTYPE_TMP
, splits
);
669 return (octets
< 2 || invalid
) ? false : true;
672 /* Get next community token from string. */
674 community_gettoken(const char *buf
, enum community_token
*token
, uint32_t *val
)
678 /* Skip white space. */
679 while (isspace((unsigned char)*p
))
682 /* Check the end of the line. */
686 /* Well known community string check. */
687 if (isalpha((unsigned char)*p
)) {
688 if (strncmp(p
, "internet", strlen("internet")) == 0) {
689 *val
= COMMUNITY_INTERNET
;
690 *token
= community_token_no_export
;
691 p
+= strlen("internet");
694 if (strncmp(p
, "graceful-shutdown", strlen("graceful-shutdown"))
696 *val
= COMMUNITY_GSHUT
;
697 *token
= community_token_gshut
;
698 p
+= strlen("graceful-shutdown");
701 if (strncmp(p
, "accept-own-nexthop",
702 strlen("accept-own-nexthop"))
704 *val
= COMMUNITY_ACCEPT_OWN_NEXTHOP
;
705 *token
= community_token_accept_own_nexthop
;
706 p
+= strlen("accept-own-nexthop");
709 if (strncmp(p
, "accept-own", strlen("accept-own"))
711 *val
= COMMUNITY_ACCEPT_OWN
;
712 *token
= community_token_accept_own
;
713 p
+= strlen("accept-own");
716 if (strncmp(p
, "route-filter-translated-v4",
717 strlen("route-filter-translated-v4"))
719 *val
= COMMUNITY_ROUTE_FILTER_TRANSLATED_v4
;
720 *token
= community_token_route_filter_translated_v4
;
721 p
+= strlen("route-filter-translated-v4");
724 if (strncmp(p
, "route-filter-v4", strlen("route-filter-v4"))
726 *val
= COMMUNITY_ROUTE_FILTER_v4
;
727 *token
= community_token_route_filter_v4
;
728 p
+= strlen("route-filter-v4");
731 if (strncmp(p
, "route-filter-translated-v6",
732 strlen("route-filter-translated-v6"))
734 *val
= COMMUNITY_ROUTE_FILTER_TRANSLATED_v6
;
735 *token
= community_token_route_filter_translated_v6
;
736 p
+= strlen("route-filter-translated-v6");
739 if (strncmp(p
, "route-filter-v6", strlen("route-filter-v6"))
741 *val
= COMMUNITY_ROUTE_FILTER_v6
;
742 *token
= community_token_route_filter_v6
;
743 p
+= strlen("route-filter-v6");
746 if (strncmp(p
, "llgr-stale", strlen("llgr-stale"))
748 *val
= COMMUNITY_LLGR_STALE
;
749 *token
= community_token_llgr_stale
;
750 p
+= strlen("llgr-stale");
753 if (strncmp(p
, "no-llgr", strlen("no-llgr"))
755 *val
= COMMUNITY_NO_LLGR
;
756 *token
= community_token_no_llgr
;
757 p
+= strlen("no-llgr");
760 if (strncmp(p
, "blackhole", strlen("blackhole"))
762 *val
= COMMUNITY_BLACKHOLE
;
763 *token
= community_token_blackhole
;
764 p
+= strlen("blackhole");
767 if (strncmp(p
, "no-export", strlen("no-export")) == 0) {
768 *val
= COMMUNITY_NO_EXPORT
;
769 *token
= community_token_no_export
;
770 p
+= strlen("no-export");
773 if (strncmp(p
, "no-advertise", strlen("no-advertise")) == 0) {
774 *val
= COMMUNITY_NO_ADVERTISE
;
775 *token
= community_token_no_advertise
;
776 p
+= strlen("no-advertise");
779 if (strncmp(p
, "local-AS", strlen("local-AS")) == 0) {
780 *val
= COMMUNITY_LOCAL_AS
;
781 *token
= community_token_local_as
;
782 p
+= strlen("local-AS");
785 if (strncmp(p
, "no-peer", strlen("no-peer")) == 0) {
786 *val
= COMMUNITY_NO_PEER
;
787 *token
= community_token_no_peer
;
788 p
+= strlen("no-peer");
792 /* Unknown string. */
793 *token
= community_token_unknown
;
797 /* Community value. */
798 if (isdigit((unsigned char)*p
)) {
801 uint32_t community_low
= 0;
802 uint32_t community_high
= 0;
804 if (!community_valid(p
)) {
805 *token
= community_token_unknown
;
809 while (isdigit((unsigned char)*p
) || *p
== ':') {
812 *token
= community_token_unknown
;
818 if (community_low
> UINT16_MAX
) {
820 community_token_unknown
;
824 community_high
= community_low
<< 16;
830 community_low
+= (*p
- '0');
835 *token
= community_token_unknown
;
839 *val
= community_high
+ community_low
;
840 *token
= community_token_val
;
843 *token
= community_token_unknown
;
847 /* convert string to community structure */
848 struct community
*community_str2com(const char *str
)
850 struct community
*com
= NULL
;
851 struct community
*com_sort
= NULL
;
853 enum community_token token
= community_token_unknown
;
856 str
= community_gettoken(str
, &token
, &val
);
859 case community_token_val
:
860 case community_token_gshut
:
861 case community_token_accept_own
:
862 case community_token_route_filter_translated_v4
:
863 case community_token_route_filter_v4
:
864 case community_token_route_filter_translated_v6
:
865 case community_token_route_filter_v6
:
866 case community_token_llgr_stale
:
867 case community_token_no_llgr
:
868 case community_token_accept_own_nexthop
:
869 case community_token_blackhole
:
870 case community_token_no_export
:
871 case community_token_no_advertise
:
872 case community_token_local_as
:
873 case community_token_no_peer
:
875 com
= community_new();
878 community_add_val(com
, val
);
880 case community_token_unknown
:
882 community_free(&com
);
887 com_sort
= community_uniq_sort(com
);
888 community_free(&com
);
893 /* Return communities hash entry count. */
894 unsigned long community_count(void)
896 return comhash
->count
;
899 /* Return communities hash. */
900 struct hash
*community_hash(void)
905 /* Initialize comminity related hash. */
906 void community_init(void)
909 hash_create((unsigned int (*)(const void *))community_hash_make
,
910 (bool (*)(const void *, const void *))community_cmp
,
911 "BGP Community Hash");
914 void community_finish(void)
920 static struct community
*bgp_aggr_community_lookup(
921 struct bgp_aggregate
*aggregate
,
922 struct community
*community
)
924 return hash_lookup(aggregate
->community_hash
, community
);
927 static void *bgp_aggr_community_hash_alloc(void *p
)
929 struct community
*ref
= (struct community
*)p
;
930 struct community
*community
= NULL
;
932 community
= community_dup(ref
);
936 static void bgp_aggr_community_prepare(struct hash_bucket
*hb
, void *arg
)
938 struct community
*hb_community
= hb
->data
;
939 struct community
**aggr_community
= arg
;
942 *aggr_community
= community_merge(*aggr_community
,
945 *aggr_community
= community_dup(hb_community
);
948 void bgp_aggr_community_remove(void *arg
)
950 struct community
*community
= arg
;
952 community_free(&community
);
955 void bgp_compute_aggregate_community(struct bgp_aggregate
*aggregate
,
956 struct community
*community
)
958 bgp_compute_aggregate_community_hash(aggregate
, community
);
959 bgp_compute_aggregate_community_val(aggregate
);
963 void bgp_compute_aggregate_community_hash(struct bgp_aggregate
*aggregate
,
964 struct community
*community
)
966 struct community
*aggr_community
= NULL
;
968 if ((aggregate
== NULL
) || (community
== NULL
))
971 /* Create hash if not already created.
973 if (aggregate
->community_hash
== NULL
)
974 aggregate
->community_hash
= hash_create(
975 (unsigned int (*)(const void *))community_hash_make
,
976 (bool (*)(const void *, const void *))community_cmp
,
977 "BGP Aggregator community hash");
979 aggr_community
= bgp_aggr_community_lookup(aggregate
, community
);
980 if (aggr_community
== NULL
) {
981 /* Insert community into hash.
983 aggr_community
= hash_get(aggregate
->community_hash
, community
,
984 bgp_aggr_community_hash_alloc
);
987 /* Increment reference counter.
989 aggr_community
->refcnt
++;
992 void bgp_compute_aggregate_community_val(struct bgp_aggregate
*aggregate
)
994 struct community
*commerge
= NULL
;
996 if (aggregate
== NULL
)
999 /* Re-compute aggregate's community.
1001 if (aggregate
->community
)
1002 community_free(&aggregate
->community
);
1003 if (aggregate
->community_hash
&&
1004 aggregate
->community_hash
->count
) {
1005 hash_iterate(aggregate
->community_hash
,
1006 bgp_aggr_community_prepare
,
1007 &aggregate
->community
);
1008 commerge
= aggregate
->community
;
1009 aggregate
->community
= community_uniq_sort(commerge
);
1011 community_free(&commerge
);
1017 void bgp_remove_community_from_aggregate(struct bgp_aggregate
*aggregate
,
1018 struct community
*community
)
1020 struct community
*aggr_community
= NULL
;
1021 struct community
*ret_comm
= NULL
;
1024 || (!aggregate
->community_hash
)
1028 /* Look-up the community in the hash.
1030 aggr_community
= bgp_aggr_community_lookup(aggregate
, community
);
1031 if (aggr_community
) {
1032 aggr_community
->refcnt
--;
1034 if (aggr_community
->refcnt
== 0) {
1035 ret_comm
= hash_release(aggregate
->community_hash
,
1037 community_free(&ret_comm
);
1039 bgp_compute_aggregate_community_val(aggregate
);
1044 void bgp_remove_comm_from_aggregate_hash(struct bgp_aggregate
*aggregate
,
1045 struct community
*community
)
1048 struct community
*aggr_community
= NULL
;
1049 struct community
*ret_comm
= NULL
;
1052 || (!aggregate
->community_hash
)
1056 /* Look-up the community in the hash.
1058 aggr_community
= bgp_aggr_community_lookup(aggregate
, community
);
1059 if (aggr_community
) {
1060 aggr_community
->refcnt
--;
1062 if (aggr_community
->refcnt
== 0) {
1063 ret_comm
= hash_release(aggregate
->community_hash
,
1065 community_free(&ret_comm
);