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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 | ||
718e3744 | 24 | /* AS path segment type. */ |
25 | #define AS_SET 1 | |
26 | #define AS_SEQUENCE 2 | |
27 | #define AS_CONFED_SEQUENCE 3 | |
28 | #define AS_CONFED_SET 4 | |
29 | ||
30 | /* Private AS range defined in RFC2270. */ | |
fd79ac91 | 31 | #define BGP_PRIVATE_AS_MIN 64512U |
32 | #define BGP_PRIVATE_AS_MAX 65535U | |
33 | ||
0b2aa3a0 PJ |
34 | /* we leave BGP_AS_MAX as the 16bit AS MAX number. */ |
35 | #define BGP_AS_MAX 65535U | |
36 | #define BGP_AS4_MAX 4294967295U | |
37 | /* Transition 16Bit AS as defined by IANA */ | |
38 | #define BGP_AS_TRANS 23456U | |
718e3744 | 39 | |
fe69a505 | 40 | /* AS_PATH segment data in abstracted form, no limit is placed on length */ |
41 | struct assegment | |
42 | { | |
43 | struct assegment *next; | |
44 | as_t *as; | |
45 | u_short length; | |
46 | u_char type; | |
47 | }; | |
48 | ||
718e3744 | 49 | /* AS path may be include some AsSegments. */ |
50 | struct aspath | |
51 | { | |
52 | /* Reference count to this aspath. */ | |
53 | unsigned long refcnt; | |
54 | ||
fe69a505 | 55 | /* segment data */ |
56 | struct assegment *segments; | |
6811845b | 57 | |
718e3744 | 58 | /* String expression of AS path. This string is used by vty output |
59 | and AS path regular expression match. */ | |
60 | char *str; | |
61 | }; | |
62 | ||
63 | #define ASPATH_STR_DEFAULT_LEN 32 | |
64 | ||
65 | /* Prototypes. */ | |
94f2b392 | 66 | extern void aspath_init (void); |
8fdc32ab | 67 | extern void aspath_finish (void); |
0b2aa3a0 | 68 | extern struct aspath *aspath_parse (struct stream *, size_t, int); |
94f2b392 | 69 | extern struct aspath *aspath_dup (struct aspath *); |
70 | extern struct aspath *aspath_aggregate (struct aspath *, struct aspath *); | |
71 | extern struct aspath *aspath_prepend (struct aspath *, struct aspath *); | |
841f7a57 | 72 | extern struct aspath *aspath_filter_exclude (struct aspath *, struct aspath *); |
94f2b392 | 73 | extern struct aspath *aspath_add_seq (struct aspath *, as_t); |
74 | extern struct aspath *aspath_add_confed_seq (struct aspath *, as_t); | |
ffe11cfb SH |
75 | extern int aspath_cmp_left (const struct aspath *, const struct aspath *); |
76 | extern int aspath_cmp_left_confed (const struct aspath *, const struct aspath *); | |
94f2b392 | 77 | extern struct aspath *aspath_delete_confed_seq (struct aspath *); |
78 | extern struct aspath *aspath_empty (void); | |
79 | extern struct aspath *aspath_empty_get (void); | |
80 | extern struct aspath *aspath_str2aspath (const char *); | |
81 | extern void aspath_free (struct aspath *); | |
82 | extern struct aspath *aspath_intern (struct aspath *); | |
83 | extern void aspath_unintern (struct aspath *); | |
84 | extern const char *aspath_print (struct aspath *); | |
841f7a57 | 85 | extern void aspath_print_vty (struct vty *, const char *, struct aspath *, const char *); |
94f2b392 | 86 | extern void aspath_print_all_vty (struct vty *); |
923de654 | 87 | extern unsigned int aspath_key_make (void *); |
94f2b392 | 88 | extern int aspath_loop_check (struct aspath *, as_t); |
89 | extern int aspath_private_as_check (struct aspath *); | |
90 | extern int aspath_firstas_check (struct aspath *, as_t); | |
91 | extern unsigned long aspath_count (void); | |
fe69a505 | 92 | extern unsigned int aspath_count_hops (struct aspath *); |
93 | extern unsigned int aspath_count_confeds (struct aspath *); | |
94 | extern unsigned int aspath_size (struct aspath *); | |
2815e61f | 95 | extern as_t aspath_highest (struct aspath *); |
0b2aa3a0 PJ |
96 | extern size_t aspath_put (struct stream *, struct aspath *, int); |
97 | ||
98 | extern struct aspath *aspath_reconcile_as4 (struct aspath *, struct aspath *); | |
99 | extern unsigned int aspath_has_as4 (struct aspath *); | |
100 | extern unsigned int aspath_count_numas (struct aspath *); | |
fe69a505 | 101 | |
102 | /* For SNMP BGP4PATHATTRASPATHSEGMENT, might be useful for debug */ | |
103 | extern u_char *aspath_snmp_pathseg (struct aspath *, size_t *); | |
00d252cb | 104 | |
105 | #endif /* _QUAGGA_BGP_ASPATH_H */ |