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- /* AS path related definitions.
- Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
- This file is part of GNU Zebra.
- GNU Zebra is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2, or (at your option) any
- later version.
- GNU Zebra is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with GNU Zebra; see the file COPYING. If not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
- #ifndef _QUAGGA_BGP_ASPATH_H
- #define _QUAGGA_BGP_ASPATH_H
- /* AS path segment type. */
- #define AS_SET 1
- #define AS_SEQUENCE 2
- #define AS_CONFED_SEQUENCE 3
- #define AS_CONFED_SET 4
- /* Private AS range defined in RFC2270. */
- #define BGP_PRIVATE_AS_MIN 64512U
- #define BGP_PRIVATE_AS_MAX 65535U
- /* Private 4 byte AS range defined in RFC6996. */
- #define BGP_PRIVATE_AS4_MIN 4200000000U
- #define BGP_PRIVATE_AS4_MAX 4294967294U
- /* we leave BGP_AS_MAX as the 16bit AS MAX number. */
- #define BGP_AS_MAX 65535U
- #define BGP_AS4_MAX 4294967295U
- /* Transition 16Bit AS as defined by IANA */
- #define BGP_AS_TRANS 23456U
- #define BGP_AS_IS_PRIVATE(ASN) \
- (((ASN) >= BGP_PRIVATE_AS_MIN && (ASN) <= BGP_PRIVATE_AS_MAX) || \
- ((ASN) >= BGP_PRIVATE_AS4_MIN && (ASN) <= BGP_PRIVATE_AS4_MAX))
- /* AS_PATH segment data in abstracted form, no limit is placed on length */
- struct assegment
- {
- struct assegment *next;
- as_t *as;
- u_short length;
- u_char type;
- };
- /* AS path may be include some AsSegments. */
- struct aspath
- {
- /* Reference count to this aspath. */
- unsigned long refcnt;
- /* segment data */
- struct assegment *segments;
-
- /* String expression of AS path. This string is used by vty output
- and AS path regular expression match. */
- char *str;
- unsigned short str_len;
- };
- #define ASPATH_STR_DEFAULT_LEN 32
- /* Prototypes. */
- extern void aspath_init (void);
- extern void aspath_finish (void);
- extern struct aspath *aspath_parse (struct stream *, size_t, int);
- extern struct aspath *aspath_dup (struct aspath *);
- extern struct aspath *aspath_aggregate (struct aspath *, struct aspath *);
- extern struct aspath *aspath_aggregate_mpath (struct aspath *, struct aspath *);
- extern struct aspath *aspath_prepend (struct aspath *, struct aspath *);
- extern struct aspath *aspath_filter_exclude (struct aspath *, struct aspath *);
- extern struct aspath *aspath_add_seq_n (struct aspath *, as_t, unsigned);
- extern struct aspath *aspath_add_seq (struct aspath *, as_t);
- extern struct aspath *aspath_add_confed_seq (struct aspath *, as_t);
- extern int aspath_cmp (const void *, const void *);
- extern int aspath_cmp_left (const struct aspath *, const struct aspath *);
- extern int aspath_cmp_left_confed (const struct aspath *, const struct aspath *);
- extern struct aspath *aspath_delete_confed_seq (struct aspath *);
- extern struct aspath *aspath_empty (void);
- extern struct aspath *aspath_empty_get (void);
- extern struct aspath *aspath_str2aspath (const char *);
- extern void aspath_free (struct aspath *);
- extern struct aspath *aspath_intern (struct aspath *);
- extern void aspath_unintern (struct aspath **);
- extern const char *aspath_print (struct aspath *);
- extern void aspath_print_vty (struct vty *, const char *, struct aspath *, const char *);
- extern void aspath_print_all_vty (struct vty *);
- extern unsigned int aspath_key_make (void *);
- extern int aspath_loop_check (struct aspath *, as_t);
- extern int aspath_private_as_check (struct aspath *);
- extern int aspath_firstas_check (struct aspath *, as_t);
- extern int aspath_confed_check (struct aspath *);
- extern int aspath_left_confed_check (struct aspath *);
- extern unsigned long aspath_count (void);
- extern unsigned int aspath_count_hops (const struct aspath *);
- extern unsigned int aspath_count_confeds (struct aspath *);
- extern unsigned int aspath_size (struct aspath *);
- extern as_t aspath_highest (struct aspath *);
- extern as_t aspath_leftmost (struct aspath *);
- extern size_t aspath_put (struct stream *, struct aspath *, int);
- extern struct aspath *aspath_reconcile_as4 (struct aspath *, struct aspath *);
- extern unsigned int aspath_has_as4 (struct aspath *);
- /* For SNMP BGP4PATHATTRASPATHSEGMENT, might be useful for debug */
- extern u_char *aspath_snmp_pathseg (struct aspath *, size_t *);
- #endif /* _QUAGGA_BGP_ASPATH_H */
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