mirror of https://github.com/FRRouting/frr.git
125 lines
4.6 KiB
C
125 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Community attribute related functions.
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* Copyright (C) 1998 Kunihiro Ishiguro
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*/
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#ifndef _QUAGGA_BGP_COMMUNITY_H
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#define _QUAGGA_BGP_COMMUNITY_H
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#include "lib/json.h"
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#include "bgpd/bgp_route.h"
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#include "bgpd/bgp_attr.h"
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/* Communities attribute. */
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struct community {
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/* Reference count of communities value. */
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unsigned long refcnt;
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/* Communities value size. */
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int size;
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/* Communities value. */
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uint32_t *val;
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/* Communities as a json object */
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json_object *json;
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/* String of community attribute. This sring is used by vty output
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and expanded community-list for regular expression match. */
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char *str;
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};
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/* Well-known communities value. */
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#define COMMUNITY_INTERNET 0x0
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#define COMMUNITY_GSHUT 0xFFFF0000
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#define COMMUNITY_ACCEPT_OWN 0xFFFF0001
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#define COMMUNITY_ROUTE_FILTER_TRANSLATED_v4 0xFFFF0002
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#define COMMUNITY_ROUTE_FILTER_v4 0xFFFF0003
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#define COMMUNITY_ROUTE_FILTER_TRANSLATED_v6 0xFFFF0004
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#define COMMUNITY_ROUTE_FILTER_v6 0xFFFF0005
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#define COMMUNITY_LLGR_STALE 0xFFFF0006
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#define COMMUNITY_NO_LLGR 0xFFFF0007
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#define COMMUNITY_ACCEPT_OWN_NEXTHOP 0xFFFF0008
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#define COMMUNITY_BLACKHOLE 0xFFFF029A
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#define COMMUNITY_NO_EXPORT 0xFFFFFF01
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#define COMMUNITY_NO_ADVERTISE 0xFFFFFF02
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#define COMMUNITY_NO_EXPORT_SUBCONFED 0xFFFFFF03
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#define COMMUNITY_LOCAL_AS 0xFFFFFF03
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#define COMMUNITY_NO_PEER 0xFFFFFF04
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#define COMMUNITY_SIZE 4
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/* Macros of community attribute. */
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#define com_length(X) ((X)->size * COMMUNITY_SIZE)
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#define com_lastval(X) ((X)->val + (X)->size - 1)
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#define com_nthval(X,n) ((X)->val + (n))
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/* Prototypes of communities attribute functions. */
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extern void community_init(void);
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extern void community_finish(void);
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extern void community_free(struct community **comm);
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extern struct community *community_uniq_sort(struct community *com);
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extern struct community *community_parse(uint32_t *pnt, unsigned short length);
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extern struct community *community_intern(struct community *com);
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extern void community_unintern(struct community **com);
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extern char *community_str(struct community *com, bool make_json,
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bool translate_alias);
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extern unsigned int community_hash_make(const struct community *com);
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extern struct community *community_str2com(const char *str);
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extern bool community_match(const struct community *com1,
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const struct community *com2);
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extern bool community_cmp(const struct community *c1,
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const struct community *c2);
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extern struct community *community_merge(struct community *com1,
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struct community *com2);
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extern struct community *community_delete(struct community *com1,
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struct community *com2);
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extern struct community *community_dup(struct community *com);
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extern bool community_include(struct community *com, uint32_t val);
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extern void community_add_val(struct community *com, uint32_t val);
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extern void community_del_val(struct community *com, uint32_t *val);
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extern unsigned long community_count(void);
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extern struct hash *community_hash(void);
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extern uint32_t community_val_get(struct community *com, int i);
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extern void bgp_compute_aggregate_community(struct bgp_aggregate *aggregate,
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struct community *community);
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extern void bgp_compute_aggregate_community_val(
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struct bgp_aggregate *aggregate);
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extern void bgp_compute_aggregate_community_hash(
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struct bgp_aggregate *aggregate,
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struct community *community);
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extern void bgp_remove_community_from_aggregate(struct bgp_aggregate *aggregate,
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struct community *community);
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extern void bgp_remove_comm_from_aggregate_hash(struct bgp_aggregate *aggregate,
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struct community *community);
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extern void bgp_aggr_community_remove(void *arg);
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/* This implies that when propagating routes into a VRF, the ACCEPT_OWN
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* community SHOULD NOT be propagated.
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*/
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static inline void community_strip_accept_own(struct attr *attr)
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{
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struct community *old_com = bgp_attr_get_community(attr);
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struct community *new_com = NULL;
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uint32_t val = COMMUNITY_ACCEPT_OWN;
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if (old_com && community_include(old_com, val)) {
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new_com = community_dup(old_com);
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val = htonl(val);
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community_del_val(new_com, &val);
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if (!old_com->refcnt)
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community_free(&old_com);
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if (!new_com->size) {
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community_free(&new_com);
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bgp_attr_set_community(attr, NULL);
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} else {
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bgp_attr_set_community(attr, new_com);
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}
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}
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}
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#endif /* _QUAGGA_BGP_COMMUNITY_H */
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