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718e3744 | 1 | /* AS path related definitions. |
896014f4 DL |
2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro |
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_ASPATH_H |
22 | #define _QUAGGA_BGP_ASPATH_H | |
23 | ||
f1aa5d8a DS |
24 | #include "lib/json.h" |
25 | ||
718e3744 | 26 | /* AS path segment type. */ |
27 | #define AS_SET 1 | |
28 | #define AS_SEQUENCE 2 | |
29 | #define AS_CONFED_SEQUENCE 3 | |
30 | #define AS_CONFED_SET 4 | |
31 | ||
32 | /* Private AS range defined in RFC2270. */ | |
fd79ac91 | 33 | #define BGP_PRIVATE_AS_MIN 64512U |
34 | #define BGP_PRIVATE_AS_MAX 65535U | |
35 | ||
2e8142b2 DS |
36 | /* Private 4 byte AS range defined in RFC6996. */ |
37 | #define BGP_PRIVATE_AS4_MIN 4200000000U | |
38 | #define BGP_PRIVATE_AS4_MAX 4294967294U | |
39 | ||
0b2aa3a0 PJ |
40 | /* we leave BGP_AS_MAX as the 16bit AS MAX number. */ |
41 | #define BGP_AS_MAX 65535U | |
42 | #define BGP_AS4_MAX 4294967295U | |
43 | /* Transition 16Bit AS as defined by IANA */ | |
44 | #define BGP_AS_TRANS 23456U | |
718e3744 | 45 | |
d62a17ae | 46 | #define BGP_AS_IS_PRIVATE(ASN) \ |
47 | (((ASN) >= BGP_PRIVATE_AS_MIN && (ASN) <= BGP_PRIVATE_AS_MAX) \ | |
48 | || ((ASN) >= BGP_PRIVATE_AS4_MIN && (ASN) <= BGP_PRIVATE_AS4_MAX)) | |
5000f21c | 49 | |
fe69a505 | 50 | /* AS_PATH segment data in abstracted form, no limit is placed on length */ |
d62a17ae | 51 | struct assegment { |
52 | struct assegment *next; | |
53 | as_t *as; | |
d7c0a89a QY |
54 | unsigned short length; |
55 | uint8_t type; | |
fe69a505 | 56 | }; |
57 | ||
718e3744 | 58 | /* AS path may be include some AsSegments. */ |
d62a17ae | 59 | struct aspath { |
60 | /* Reference count to this aspath. */ | |
61 | unsigned long refcnt; | |
62 | ||
63 | /* segment data */ | |
64 | struct assegment *segments; | |
65 | ||
66 | /* AS path as a json object */ | |
67 | json_object *json; | |
68 | ||
69 | /* String expression of AS path. This string is used by vty output | |
70 | and AS path regular expression match. */ | |
71 | char *str; | |
72 | unsigned short str_len; | |
718e3744 | 73 | }; |
74 | ||
75 | #define ASPATH_STR_DEFAULT_LEN 32 | |
76 | ||
77 | /* Prototypes. */ | |
d62a17ae | 78 | extern void aspath_init(void); |
79 | extern void aspath_finish(void); | |
80 | extern struct aspath *aspath_parse(struct stream *, size_t, int); | |
81 | extern struct aspath *aspath_dup(struct aspath *); | |
82 | extern struct aspath *aspath_aggregate(struct aspath *, struct aspath *); | |
83 | extern struct aspath *aspath_prepend(struct aspath *, struct aspath *); | |
84 | extern struct aspath *aspath_filter_exclude(struct aspath *, struct aspath *); | |
85 | extern struct aspath *aspath_add_seq_n(struct aspath *, as_t, unsigned); | |
86 | extern struct aspath *aspath_add_seq(struct aspath *, as_t); | |
87 | extern struct aspath *aspath_add_confed_seq(struct aspath *, as_t); | |
88 | extern int aspath_cmp(const void *, const void *); | |
89 | extern int aspath_cmp_left(const struct aspath *, const struct aspath *); | |
90 | extern int aspath_cmp_left_confed(const struct aspath *, const struct aspath *); | |
91 | extern struct aspath *aspath_delete_confed_seq(struct aspath *); | |
92 | extern struct aspath *aspath_empty(void); | |
93 | extern struct aspath *aspath_empty_get(void); | |
94 | extern struct aspath *aspath_str2aspath(const char *); | |
68e1a55b | 95 | extern void aspath_str_update(struct aspath *as, bool make_json); |
d62a17ae | 96 | extern void aspath_free(struct aspath *); |
97 | extern struct aspath *aspath_intern(struct aspath *); | |
98 | extern void aspath_unintern(struct aspath **); | |
99 | extern const char *aspath_print(struct aspath *); | |
100 | extern void aspath_print_vty(struct vty *, const char *, struct aspath *, | |
101 | const char *); | |
102 | extern void aspath_print_all_vty(struct vty *); | |
103 | extern unsigned int aspath_key_make(void *); | |
104 | extern unsigned int aspath_get_first_as(struct aspath *); | |
105 | extern unsigned int aspath_get_last_as(struct aspath *); | |
106 | extern int aspath_loop_check(struct aspath *, as_t); | |
107 | extern int aspath_private_as_check(struct aspath *); | |
108 | extern int aspath_single_asn_check(struct aspath *, as_t asn); | |
109 | extern struct aspath *aspath_replace_specific_asn(struct aspath *aspath, | |
110 | as_t target_asn, | |
111 | as_t our_asn); | |
112 | extern struct aspath *aspath_replace_private_asns(struct aspath *aspath, | |
113 | as_t asn); | |
114 | extern struct aspath *aspath_remove_private_asns(struct aspath *aspath); | |
115 | extern int aspath_firstas_check(struct aspath *, as_t); | |
116 | extern int aspath_confed_check(struct aspath *); | |
117 | extern int aspath_left_confed_check(struct aspath *); | |
118 | extern unsigned long aspath_count(void); | |
119 | extern unsigned int aspath_count_hops(const struct aspath *); | |
120 | extern unsigned int aspath_count_confeds(struct aspath *); | |
121 | extern unsigned int aspath_size(struct aspath *); | |
122 | extern as_t aspath_highest(struct aspath *); | |
123 | extern as_t aspath_leftmost(struct aspath *); | |
124 | extern size_t aspath_put(struct stream *, struct aspath *, int); | |
125 | ||
126 | extern struct aspath *aspath_reconcile_as4(struct aspath *, struct aspath *); | |
127 | extern unsigned int aspath_has_as4(struct aspath *); | |
fe69a505 | 128 | |
129 | /* For SNMP BGP4PATHATTRASPATHSEGMENT, might be useful for debug */ | |
d7c0a89a | 130 | extern uint8_t *aspath_snmp_pathseg(struct aspath *, size_t *); |
00d252cb | 131 | |
132 | #endif /* _QUAGGA_BGP_ASPATH_H */ |