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1 /* BGP Extended Communities Attribute.
2 * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
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
21 #ifndef _QUAGGA_BGP_ECOMMUNITY_H
22 #define _QUAGGA_BGP_ECOMMUNITY_H
24 /* High-order octet of the Extended Communities type field. */
25 #define ECOMMUNITY_ENCODE_AS 0x00
26 #define ECOMMUNITY_ENCODE_IP 0x01
27 #define ECOMMUNITY_ENCODE_AS4 0x02
28 #define ECOMMUNITY_ENCODE_OPAQUE 0x03
29 #define ECOMMUNITY_ENCODE_EVPN 0x06
31 /* Low-order octet of the Extended Communities type field. */
32 #define ECOMMUNITY_ROUTE_TARGET 0x02
33 #define ECOMMUNITY_SITE_ORIGIN 0x03
35 /* Low-order octet of the Extended Communities type field for EVPN types */
36 #define ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY 0x00
37 #define ECOMMUNITY_EVPN_SUBTYPE_ESI_LABEL 0x01
38 #define ECOMMUNITY_EVPN_SUBTYPE_ES_IMPORT_RT 0x02
39 #define ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC 0x03
40 #define ECOMMUNITY_EVPN_SUBTYPE_DEF_GW 0x0d
42 #define ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY 0x01
44 /* Low-order octet of the Extended Communities type field for OPAQUE types */
45 #define ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP 0x0c
47 /* Extended communities attribute string format. */
48 #define ECOMMUNITY_FORMAT_ROUTE_MAP 0
49 #define ECOMMUNITY_FORMAT_COMMUNITY_LIST 1
50 #define ECOMMUNITY_FORMAT_DISPLAY 2
52 /* Extended Communities value is eight octet long. */
53 #define ECOMMUNITY_SIZE 8
55 /* Extended Communities type flag. */
56 #define ECOMMUNITY_FLAG_NON_TRANSITIVE 0x40
58 /* Extended Communities attribute. */
60 /* Reference counter. */
63 /* Size of Extended Communities attribute. */
66 /* Extended Communities value. */
69 /* Human readable format string. */
73 struct ecommunity_as
{
78 struct ecommunity_ip
{
83 /* Extended community value is eight octet. */
84 struct ecommunity_val
{
85 char val
[ECOMMUNITY_SIZE
];
88 #define ecom_length(X) ((X)->size * ECOMMUNITY_SIZE)
91 * Encode BGP Route Target AS:nn.
93 static inline void encode_route_target_as(as_t as
, uint32_t val
,
94 struct ecommunity_val
*eval
)
96 eval
->val
[0] = ECOMMUNITY_ENCODE_AS
;
97 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
98 eval
->val
[2] = (as
>> 8) & 0xff;
99 eval
->val
[3] = as
& 0xff;
100 eval
->val
[4] = (val
>> 24) & 0xff;
101 eval
->val
[5] = (val
>> 16) & 0xff;
102 eval
->val
[6] = (val
>> 8) & 0xff;
103 eval
->val
[7] = val
& 0xff;
107 * Encode BGP Route Target IP:nn.
109 static inline void encode_route_target_ip(struct in_addr ip
, uint16_t val
,
110 struct ecommunity_val
*eval
)
112 eval
->val
[0] = ECOMMUNITY_ENCODE_IP
;
113 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
114 memcpy(&eval
->val
[2], &ip
, sizeof(struct in_addr
));
115 eval
->val
[6] = (val
>> 8) & 0xff;
116 eval
->val
[7] = val
& 0xff;
120 * Encode BGP Route Target AS4:nn.
122 static inline void encode_route_target_as4(as_t as
, uint16_t val
,
123 struct ecommunity_val
*eval
)
125 eval
->val
[0] = ECOMMUNITY_ENCODE_AS4
;
126 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
127 eval
->val
[2] = (as
>> 24) & 0xff;
128 eval
->val
[3] = (as
>> 16) & 0xff;
129 eval
->val
[4] = (as
>> 8) & 0xff;
130 eval
->val
[5] = as
& 0xff;
131 eval
->val
[6] = (val
>> 8) & 0xff;
132 eval
->val
[7] = val
& 0xff;
135 extern void ecommunity_init(void);
136 extern void ecommunity_finish(void);
137 extern void ecommunity_free(struct ecommunity
**);
138 extern struct ecommunity
*ecommunity_parse(uint8_t *, unsigned short);
139 extern struct ecommunity
*ecommunity_dup(struct ecommunity
*);
140 extern struct ecommunity
*ecommunity_merge(struct ecommunity
*,
141 struct ecommunity
*);
142 extern struct ecommunity
*ecommunity_uniq_sort(struct ecommunity
*);
143 extern struct ecommunity
*ecommunity_intern(struct ecommunity
*);
144 extern int ecommunity_cmp(const void *, const void *);
145 extern void ecommunity_unintern(struct ecommunity
**);
146 extern unsigned int ecommunity_hash_make(void *);
147 extern struct ecommunity
*ecommunity_str2com(const char *, int, int);
148 extern char *ecommunity_ecom2str(struct ecommunity
*, int, int);
149 extern int ecommunity_match(const struct ecommunity
*,
150 const struct ecommunity
*);
151 extern char *ecommunity_str(struct ecommunity
*);
152 extern struct ecommunity_val
*ecommunity_lookup(const struct ecommunity
*,
154 extern int ecommunity_add_val(struct ecommunity
*ecom
,
155 struct ecommunity_val
*eval
);
158 extern struct ecommunity
*ecommunity_new(void);
159 extern int ecommunity_add_val(struct ecommunity
*, struct ecommunity_val
*);
160 extern int ecommunity_strip(struct ecommunity
*ecom
, uint8_t type
,
162 extern struct ecommunity
*ecommunity_new(void);
163 #endif /* _QUAGGA_BGP_ECOMMUNITY_H */