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718e3744 | 1 | /* AS path related definitions. |
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 | |
17 | along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | 02111-1307, USA. */ | |
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 | |
5000f21c DS |
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)) | |
49 | ||
fe69a505 | 50 | /* AS_PATH segment data in abstracted form, no limit is placed on length */ |
51 | struct assegment | |
52 | { | |
53 | struct assegment *next; | |
54 | as_t *as; | |
55 | u_short length; | |
56 | u_char type; | |
57 | }; | |
58 | ||
718e3744 | 59 | /* AS path may be include some AsSegments. */ |
60 | struct aspath | |
61 | { | |
62 | /* Reference count to this aspath. */ | |
63 | unsigned long refcnt; | |
64 | ||
fe69a505 | 65 | /* segment data */ |
66 | struct assegment *segments; | |
6811845b | 67 | |
f1aa5d8a DS |
68 | /* AS path as a json object */ |
69 | json_object *json; | |
70 | ||
718e3744 | 71 | /* String expression of AS path. This string is used by vty output |
72 | and AS path regular expression match. */ | |
73 | char *str; | |
f669f7d2 | 74 | unsigned short str_len; |
718e3744 | 75 | }; |
76 | ||
77 | #define ASPATH_STR_DEFAULT_LEN 32 | |
78 | ||
79 | /* Prototypes. */ | |
94f2b392 | 80 | extern void aspath_init (void); |
8fdc32ab | 81 | extern void aspath_finish (void); |
ab005298 | 82 | extern struct aspath *aspath_parse (struct stream *, size_t, int); |
94f2b392 | 83 | extern struct aspath *aspath_dup (struct aspath *); |
84 | extern struct aspath *aspath_aggregate (struct aspath *, struct aspath *); | |
85 | extern struct aspath *aspath_prepend (struct aspath *, struct aspath *); | |
841f7a57 | 86 | extern struct aspath *aspath_filter_exclude (struct aspath *, struct aspath *); |
bc3dd427 | 87 | extern struct aspath *aspath_add_seq_n (struct aspath *, as_t, unsigned); |
94f2b392 | 88 | extern struct aspath *aspath_add_seq (struct aspath *, as_t); |
89 | extern struct aspath *aspath_add_confed_seq (struct aspath *, as_t); | |
96450faf | 90 | extern int aspath_cmp (const void *, const void *); |
ffe11cfb SH |
91 | extern int aspath_cmp_left (const struct aspath *, const struct aspath *); |
92 | extern int aspath_cmp_left_confed (const struct aspath *, const struct aspath *); | |
94f2b392 | 93 | extern struct aspath *aspath_delete_confed_seq (struct aspath *); |
94 | extern struct aspath *aspath_empty (void); | |
95 | extern struct aspath *aspath_empty_get (void); | |
96 | extern struct aspath *aspath_str2aspath (const char *); | |
97 | extern void aspath_free (struct aspath *); | |
98 | extern struct aspath *aspath_intern (struct aspath *); | |
f6f434b2 | 99 | extern void aspath_unintern (struct aspath **); |
94f2b392 | 100 | extern const char *aspath_print (struct aspath *); |
841f7a57 | 101 | extern void aspath_print_vty (struct vty *, const char *, struct aspath *, const char *); |
94f2b392 | 102 | extern void aspath_print_all_vty (struct vty *); |
923de654 | 103 | extern unsigned int aspath_key_make (void *); |
06370dac | 104 | extern int aspath_get_firstas (struct aspath *); |
94f2b392 | 105 | extern int aspath_loop_check (struct aspath *, as_t); |
106 | extern int aspath_private_as_check (struct aspath *); | |
c7122e14 DS |
107 | extern int aspath_single_asn_check (struct aspath *, as_t asn); |
108 | extern struct aspath *aspath_replace_specific_asn (struct aspath *aspath, as_t target_asn, as_t our_asn); | |
5000f21c DS |
109 | extern struct aspath *aspath_replace_private_asns(struct aspath *aspath, as_t asn); |
110 | extern struct aspath *aspath_remove_private_asns (struct aspath *aspath); | |
94f2b392 | 111 | extern int aspath_firstas_check (struct aspath *, as_t); |
ca87e1d3 VT |
112 | extern int aspath_confed_check (struct aspath *); |
113 | extern int aspath_left_confed_check (struct aspath *); | |
94f2b392 | 114 | extern unsigned long aspath_count (void); |
ffd0c037 | 115 | extern unsigned int aspath_count_hops (const struct aspath *); |
fe69a505 | 116 | extern unsigned int aspath_count_confeds (struct aspath *); |
117 | extern unsigned int aspath_size (struct aspath *); | |
2815e61f | 118 | extern as_t aspath_highest (struct aspath *); |
bc3dd427 | 119 | extern as_t aspath_leftmost (struct aspath *); |
0b2aa3a0 PJ |
120 | extern size_t aspath_put (struct stream *, struct aspath *, int); |
121 | ||
122 | extern struct aspath *aspath_reconcile_as4 (struct aspath *, struct aspath *); | |
123 | extern unsigned int aspath_has_as4 (struct aspath *); | |
fe69a505 | 124 | |
125 | /* For SNMP BGP4PATHATTRASPATHSEGMENT, might be useful for debug */ | |
126 | extern u_char *aspath_snmp_pathseg (struct aspath *, size_t *); | |
00d252cb | 127 | |
128 | #endif /* _QUAGGA_BGP_ASPATH_H */ |