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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 */
31 #define ECOMMUNITY_ENCODE_REDIRECT_IP_NH 0x08 /* Flow Spec */
33 #define ECOMMUNITY_EXTENDED_COMMUNITY_PART_2 0x81
34 #define ECOMMUNITY_EXTENDED_COMMUNITY_PART_3 0x82
36 /* Low-order octet of the Extended Communities type field. */
37 #define ECOMMUNITY_ROUTE_TARGET 0x02
38 #define ECOMMUNITY_SITE_ORIGIN 0x03
39 #define ECOMMUNITY_TRAFFIC_RATE 0x06 /* Flow Spec */
40 #define ECOMMUNITY_TRAFFIC_ACTION 0x07
41 #define ECOMMUNITY_REDIRECT_VRF 0x08
42 #define ECOMMUNITY_TRAFFIC_MARKING 0x09
43 #define ECOMMUNITY_REDIRECT_IP_NH 0x00
45 /* Low-order octet of the Extended Communities type field for EVPN types */
46 #define ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY 0x00
47 #define ECOMMUNITY_EVPN_SUBTYPE_ESI_LABEL 0x01
48 #define ECOMMUNITY_EVPN_SUBTYPE_ES_IMPORT_RT 0x02
49 #define ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC 0x03
50 #define ECOMMUNITY_EVPN_SUBTYPE_DEF_GW 0x0d
52 #define ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY 0x01
54 /* Low-order octet of the Extended Communities type field for OPAQUE types */
55 #define ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP 0x0c
57 /* Extended communities attribute string format. */
58 #define ECOMMUNITY_FORMAT_ROUTE_MAP 0
59 #define ECOMMUNITY_FORMAT_COMMUNITY_LIST 1
60 #define ECOMMUNITY_FORMAT_DISPLAY 2
62 /* Extended Communities value is eight octet long. */
63 #define ECOMMUNITY_SIZE 8
65 /* Extended Communities type flag. */
66 #define ECOMMUNITY_FLAG_NON_TRANSITIVE 0x40
68 /* Extended Communities attribute. */
70 /* Reference counter. */
73 /* Size of Extended Communities attribute. */
76 /* Extended Communities value. */
79 /* Human readable format string. */
83 struct ecommunity_as
{
88 struct ecommunity_ip
{
93 /* Extended community value is eight octet. */
94 struct ecommunity_val
{
95 char val
[ECOMMUNITY_SIZE
];
98 #define ecom_length(X) ((X)->size * ECOMMUNITY_SIZE)
101 * Encode BGP Route Target AS:nn.
103 static inline void encode_route_target_as(as_t as
, uint32_t val
,
104 struct ecommunity_val
*eval
)
106 eval
->val
[0] = ECOMMUNITY_ENCODE_AS
;
107 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
108 eval
->val
[2] = (as
>> 8) & 0xff;
109 eval
->val
[3] = as
& 0xff;
110 eval
->val
[4] = (val
>> 24) & 0xff;
111 eval
->val
[5] = (val
>> 16) & 0xff;
112 eval
->val
[6] = (val
>> 8) & 0xff;
113 eval
->val
[7] = val
& 0xff;
117 * Encode BGP Route Target IP:nn.
119 static inline void encode_route_target_ip(struct in_addr ip
, uint16_t val
,
120 struct ecommunity_val
*eval
)
122 eval
->val
[0] = ECOMMUNITY_ENCODE_IP
;
123 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
124 memcpy(&eval
->val
[2], &ip
, sizeof(struct in_addr
));
125 eval
->val
[6] = (val
>> 8) & 0xff;
126 eval
->val
[7] = val
& 0xff;
130 * Encode BGP Route Target AS4:nn.
132 static inline void encode_route_target_as4(as_t as
, uint16_t val
,
133 struct ecommunity_val
*eval
)
135 eval
->val
[0] = ECOMMUNITY_ENCODE_AS4
;
136 eval
->val
[1] = ECOMMUNITY_ROUTE_TARGET
;
137 eval
->val
[2] = (as
>> 24) & 0xff;
138 eval
->val
[3] = (as
>> 16) & 0xff;
139 eval
->val
[4] = (as
>> 8) & 0xff;
140 eval
->val
[5] = as
& 0xff;
141 eval
->val
[6] = (val
>> 8) & 0xff;
142 eval
->val
[7] = val
& 0xff;
145 extern void ecommunity_init(void);
146 extern void ecommunity_finish(void);
147 extern void ecommunity_free(struct ecommunity
**);
148 extern struct ecommunity
*ecommunity_parse(uint8_t *, unsigned short);
149 extern struct ecommunity
*ecommunity_dup(struct ecommunity
*);
150 extern struct ecommunity
*ecommunity_merge(struct ecommunity
*,
151 struct ecommunity
*);
152 extern struct ecommunity
*ecommunity_uniq_sort(struct ecommunity
*);
153 extern struct ecommunity
*ecommunity_intern(struct ecommunity
*);
154 extern int ecommunity_cmp(const void *, const void *);
155 extern void ecommunity_unintern(struct ecommunity
**);
156 extern unsigned int ecommunity_hash_make(void *);
157 extern struct ecommunity
*ecommunity_str2com(const char *, int, int);
158 extern char *ecommunity_ecom2str(struct ecommunity
*, int, int);
159 extern void ecommunity_strfree(char **s
);
160 extern int ecommunity_match(const struct ecommunity
*,
161 const struct ecommunity
*);
162 extern char *ecommunity_str(struct ecommunity
*);
163 extern struct ecommunity_val
*ecommunity_lookup(const struct ecommunity
*,
165 extern int ecommunity_add_val(struct ecommunity
*ecom
,
166 struct ecommunity_val
*eval
);
169 extern struct ecommunity
*ecommunity_new(void);
170 extern int ecommunity_add_val(struct ecommunity
*, struct ecommunity_val
*);
171 extern int ecommunity_strip(struct ecommunity
*ecom
, uint8_t type
,
173 extern struct ecommunity
*ecommunity_new(void);
174 extern int ecommunity_del_val(struct ecommunity
*ecom
,
175 struct ecommunity_val
*eval
);
176 struct bgp_pbr_entry_action
;
177 extern int ecommunity_fill_pbr_action(struct ecommunity_val
*ecom_eval
,
178 struct bgp_pbr_entry_action
*api
);
180 #endif /* _QUAGGA_BGP_ECOMMUNITY_H */