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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. */
61 /* Reference counter. */
64 /* Size of Extended Communities attribute. */
67 /* Extended Communities value. */
70 /* Human readable format string. */
74 /* Extended community value is eight octet. */
77 char val
[ECOMMUNITY_SIZE
];
80 #define ecom_length(X) ((X)->size * ECOMMUNITY_SIZE)
83 * Encode BGP Route Target AS:nn.
86 encode_route_target_as (as_t as
, u_int32_t val
,
87 struct ecommunity_val
*eval
)
89 eval
->val
[0] = ECOMMUNITY_ENCODE_AS
;
90 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
91 eval
->val
[2] = (as
>> 8) & 0xff;
92 eval
->val
[3] = as
& 0xff;
93 eval
->val
[4] = (val
>> 24) & 0xff;
94 eval
->val
[5] = (val
>> 16) & 0xff;
95 eval
->val
[6] = (val
>> 8) & 0xff;
96 eval
->val
[7] = val
& 0xff;
100 * Encode BGP Route Target IP:nn.
103 encode_route_target_ip (struct in_addr ip
, u_int16_t val
,
104 struct ecommunity_val
*eval
)
106 eval
->val
[0] = ECOMMUNITY_ENCODE_IP
;
107 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
108 memcpy (&eval
->val
[2], &ip
, sizeof (struct in_addr
));
109 eval
->val
[6] = (val
>> 8) & 0xff;
110 eval
->val
[7] = val
& 0xff;
114 * Encode BGP Route Target AS4:nn.
117 encode_route_target_as4 (as_t as
, u_int16_t val
,
118 struct ecommunity_val
*eval
)
120 eval
->val
[0] = ECOMMUNITY_ENCODE_AS4
;
121 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
122 eval
->val
[2] = (as
>> 24) & 0xff;
123 eval
->val
[3] = (as
>> 16) & 0xff;
124 eval
->val
[4] = (as
>> 8) & 0xff;
125 eval
->val
[5] = as
& 0xff;
126 eval
->val
[6] = (val
>> 8) & 0xff;
127 eval
->val
[7] = val
& 0xff;
130 extern void ecommunity_init (void);
131 extern void ecommunity_finish (void);
132 extern void ecommunity_free (struct ecommunity
**);
133 extern struct ecommunity
*ecommunity_parse (u_int8_t
*, u_short
);
134 extern struct ecommunity
*ecommunity_dup (struct ecommunity
*);
135 extern struct ecommunity
*ecommunity_merge (struct ecommunity
*, struct ecommunity
*);
136 extern struct ecommunity
*ecommunity_uniq_sort (struct ecommunity
*);
137 extern struct ecommunity
*ecommunity_intern (struct ecommunity
*);
138 extern int ecommunity_cmp (const void *, const void *);
139 extern void ecommunity_unintern (struct ecommunity
**);
140 extern unsigned int ecommunity_hash_make (void *);
141 extern struct ecommunity
*ecommunity_str2com (const char *, int, int);
142 extern char *ecommunity_ecom2str (struct ecommunity
*, int, int);
143 extern int ecommunity_match (const struct ecommunity
*, const struct ecommunity
*);
144 extern char *ecommunity_str (struct ecommunity
*);
145 extern struct ecommunity_val
*ecommunity_lookup (const struct ecommunity
*, uint8_t, uint8_t );
146 extern int ecommunity_add_val (struct ecommunity
*ecom
, struct ecommunity_val
*eval
);
149 extern struct ecommunity
*ecommunity_new (void);
150 extern int ecommunity_add_val (struct ecommunity
*, struct ecommunity_val
*);
151 extern int ecommunity_strip (struct ecommunity
*ecom
, uint8_t type
, uint8_t subtype
);
152 extern struct ecommunity
*ecommunity_new (void);
153 #endif /* _QUAGGA_BGP_ECOMMUNITY_H */