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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
30 #define ECOMMUNITY_ENCODE_TRANS_EXP 0x80 /* Flow Spec */
32 #define ECOMMUNITY_EXTENDED_COMMUNITY_PART_2 0x81
33 #define ECOMMUNITY_EXTENDED_COMMUNITY_PART_3 0x82
35 /* Low-order octet of the Extended Communities type field. */
36 #define ECOMMUNITY_ROUTE_TARGET 0x02
37 #define ECOMMUNITY_SITE_ORIGIN 0x03
38 #define ECOMMUNITY_TRAFFIC_RATE 0x06 /* Flow Spec */
39 #define ECOMMUNITY_TRAFFIC_ACTION 0x07
40 #define ECOMMUNITY_REDIRECT_VRF 0x08
41 #define ECOMMUNITY_TRAFFIC_MARKING 0x09
42 #define ECOMMUNITY_REDIRECT_IP_NH 0x00
44 /* Low-order octet of the Extended Communities type field for EVPN types */
45 #define ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY 0x00
46 #define ECOMMUNITY_EVPN_SUBTYPE_ESI_LABEL 0x01
47 #define ECOMMUNITY_EVPN_SUBTYPE_ES_IMPORT_RT 0x02
48 #define ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC 0x03
49 #define ECOMMUNITY_EVPN_SUBTYPE_DEF_GW 0x0d
51 #define ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY 0x01
53 /* Low-order octet of the Extended Communities type field for OPAQUE types */
54 #define ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP 0x0c
56 /* Extended communities attribute string format. */
57 #define ECOMMUNITY_FORMAT_ROUTE_MAP 0
58 #define ECOMMUNITY_FORMAT_COMMUNITY_LIST 1
59 #define ECOMMUNITY_FORMAT_DISPLAY 2
61 /* Extended Communities value is eight octet long. */
62 #define ECOMMUNITY_SIZE 8
64 /* Extended Communities type flag. */
65 #define ECOMMUNITY_FLAG_NON_TRANSITIVE 0x40
67 /* Extended Communities attribute. */
69 /* Reference counter. */
72 /* Size of Extended Communities attribute. */
75 /* Extended Communities value. */
78 /* Human readable format string. */
82 struct ecommunity_as
{
87 struct ecommunity_ip
{
92 /* Extended community value is eight octet. */
93 struct ecommunity_val
{
94 char val
[ECOMMUNITY_SIZE
];
97 #define ecom_length(X) ((X)->size * ECOMMUNITY_SIZE)
100 * Encode BGP Route Target AS:nn.
102 static inline void encode_route_target_as(as_t as
, uint32_t val
,
103 struct ecommunity_val
*eval
)
105 eval
->val
[0] = ECOMMUNITY_ENCODE_AS
;
106 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
107 eval
->val
[2] = (as
>> 8) & 0xff;
108 eval
->val
[3] = as
& 0xff;
109 eval
->val
[4] = (val
>> 24) & 0xff;
110 eval
->val
[5] = (val
>> 16) & 0xff;
111 eval
->val
[6] = (val
>> 8) & 0xff;
112 eval
->val
[7] = val
& 0xff;
116 * Encode BGP Route Target IP:nn.
118 static inline void encode_route_target_ip(struct in_addr ip
, uint16_t val
,
119 struct ecommunity_val
*eval
)
121 eval
->val
[0] = ECOMMUNITY_ENCODE_IP
;
122 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
123 memcpy(&eval
->val
[2], &ip
, sizeof(struct in_addr
));
124 eval
->val
[6] = (val
>> 8) & 0xff;
125 eval
->val
[7] = val
& 0xff;
129 * Encode BGP Route Target AS4:nn.
131 static inline void encode_route_target_as4(as_t as
, uint16_t val
,
132 struct ecommunity_val
*eval
)
134 eval
->val
[0] = ECOMMUNITY_ENCODE_AS4
;
135 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
136 eval
->val
[2] = (as
>> 24) & 0xff;
137 eval
->val
[3] = (as
>> 16) & 0xff;
138 eval
->val
[4] = (as
>> 8) & 0xff;
139 eval
->val
[5] = as
& 0xff;
140 eval
->val
[6] = (val
>> 8) & 0xff;
141 eval
->val
[7] = val
& 0xff;
144 extern void ecommunity_init(void);
145 extern void ecommunity_finish(void);
146 extern void ecommunity_free(struct ecommunity
**);
147 extern struct ecommunity
*ecommunity_parse(uint8_t *, unsigned short);
148 extern struct ecommunity
*ecommunity_dup(struct ecommunity
*);
149 extern struct ecommunity
*ecommunity_merge(struct ecommunity
*,
150 struct ecommunity
*);
151 extern struct ecommunity
*ecommunity_uniq_sort(struct ecommunity
*);
152 extern struct ecommunity
*ecommunity_intern(struct ecommunity
*);
153 extern int ecommunity_cmp(const void *, const void *);
154 extern void ecommunity_unintern(struct ecommunity
**);
155 extern unsigned int ecommunity_hash_make(void *);
156 extern struct ecommunity
*ecommunity_str2com(const char *, int, int);
157 extern char *ecommunity_ecom2str(struct ecommunity
*, int, int);
158 extern int ecommunity_match(const struct ecommunity
*,
159 const struct ecommunity
*);
160 extern char *ecommunity_str(struct ecommunity
*);
161 extern struct ecommunity_val
*ecommunity_lookup(const struct ecommunity
*,
163 extern int ecommunity_add_val(struct ecommunity
*ecom
,
164 struct ecommunity_val
*eval
);
167 extern struct ecommunity
*ecommunity_new(void);
168 extern int ecommunity_add_val(struct ecommunity
*, struct ecommunity_val
*);
169 extern int ecommunity_strip(struct ecommunity
*ecom
, uint8_t type
,
171 extern struct ecommunity
*ecommunity_new(void);
172 #endif /* _QUAGGA_BGP_ECOMMUNITY_H */