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718e3744 | 1 | /* BGP Extended Communities Attribute. |
896014f4 DL |
2 | * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org> |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
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 | |
9 | * later version. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | */ | |
718e3744 | 20 | |
00d252cb | 21 | #ifndef _QUAGGA_BGP_ECOMMUNITY_H |
22 | #define _QUAGGA_BGP_ECOMMUNITY_H | |
23 | ||
718e3744 | 24 | /* High-order octet of the Extended Communities type field. */ |
25 | #define ECOMMUNITY_ENCODE_AS 0x00 | |
26 | #define ECOMMUNITY_ENCODE_IP 0x01 | |
0b2aa3a0 | 27 | #define ECOMMUNITY_ENCODE_AS4 0x02 |
0014c301 | 28 | #define ECOMMUNITY_ENCODE_OPAQUE 0x03 |
e82202b7 | 29 | #define ECOMMUNITY_ENCODE_EVPN 0x06 |
718e3744 | 30 | |
0014c301 | 31 | /* Low-order octet of the Extended Communities type field. */ |
718e3744 | 32 | #define ECOMMUNITY_ROUTE_TARGET 0x02 |
33 | #define ECOMMUNITY_SITE_ORIGIN 0x03 | |
34 | ||
128ea8ab | 35 | /* Low-order octet of the Extended Communities type field for EVPN types */ |
1e27ef50 PG |
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 | |
41 | ||
128ea8ab | 42 | #define ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY 0x01 |
43 | ||
0014c301 LB |
44 | /* Low-order octet of the Extended Communities type field for OPAQUE types */ |
45 | #define ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP 0x0c | |
46 | ||
718e3744 | 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 | |
51 | ||
52 | /* Extended Communities value is eight octet long. */ | |
53 | #define ECOMMUNITY_SIZE 8 | |
54 | ||
4372df71 | 55 | /* Extended Communities type flag. */ |
7c40bf39 | 56 | #define ECOMMUNITY_FLAG_NON_TRANSITIVE 0x40 |
4372df71 | 57 | |
718e3744 | 58 | /* Extended Communities attribute. */ |
d62a17ae | 59 | struct ecommunity { |
60 | /* Reference counter. */ | |
61 | unsigned long refcnt; | |
718e3744 | 62 | |
d62a17ae | 63 | /* Size of Extended Communities attribute. */ |
64 | int size; | |
718e3744 | 65 | |
d62a17ae | 66 | /* Extended Communities value. */ |
d7c0a89a | 67 | uint8_t *val; |
718e3744 | 68 | |
d62a17ae | 69 | /* Human readable format string. */ |
70 | char *str; | |
718e3744 | 71 | }; |
72 | ||
5a0ccebf QY |
73 | struct ecommunity_as { |
74 | as_t as; | |
75 | uint32_t val; | |
76 | }; | |
77 | ||
78 | struct ecommunity_ip { | |
79 | struct in_addr ip; | |
80 | uint16_t val; | |
81 | }; | |
82 | ||
718e3744 | 83 | /* Extended community value is eight octet. */ |
d62a17ae | 84 | struct ecommunity_val { |
85 | char val[ECOMMUNITY_SIZE]; | |
718e3744 | 86 | }; |
87 | ||
88 | #define ecom_length(X) ((X)->size * ECOMMUNITY_SIZE) | |
89 | ||
c5900768 | 90 | /* |
91 | * Encode BGP Route Target AS:nn. | |
92 | */ | |
d7c0a89a | 93 | static inline void encode_route_target_as(as_t as, uint32_t val, |
d62a17ae | 94 | struct ecommunity_val *eval) |
c5900768 | 95 | { |
d62a17ae | 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; | |
c5900768 | 104 | } |
105 | ||
106 | /* | |
107 | * Encode BGP Route Target IP:nn. | |
108 | */ | |
d7c0a89a | 109 | static inline void encode_route_target_ip(struct in_addr ip, uint16_t val, |
d62a17ae | 110 | struct ecommunity_val *eval) |
c5900768 | 111 | { |
d62a17ae | 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; | |
c5900768 | 117 | } |
118 | ||
119 | /* | |
120 | * Encode BGP Route Target AS4:nn. | |
121 | */ | |
d7c0a89a | 122 | static inline void encode_route_target_as4(as_t as, uint16_t val, |
d62a17ae | 123 | struct ecommunity_val *eval) |
c5900768 | 124 | { |
d62a17ae | 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; | |
c5900768 | 133 | } |
134 | ||
d62a17ae | 135 | extern void ecommunity_init(void); |
136 | extern void ecommunity_finish(void); | |
137 | extern void ecommunity_free(struct ecommunity **); | |
d7c0a89a | 138 | extern struct ecommunity *ecommunity_parse(uint8_t *, unsigned short); |
d62a17ae | 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 *, | |
153 | uint8_t, uint8_t); | |
154 | extern int ecommunity_add_val(struct ecommunity *ecom, | |
155 | struct ecommunity_val *eval); | |
00d252cb | 156 | |
65efcfce | 157 | /* for vpn */ |
d62a17ae | 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, | |
161 | uint8_t subtype); | |
162 | extern struct ecommunity *ecommunity_new(void); | |
00d252cb | 163 | #endif /* _QUAGGA_BGP_ECOMMUNITY_H */ |