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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. */
/* 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 64512
#define BGP_PRIVATE_AS_MAX 65535
/* AS path may be include some AsSegments. */
struct aspath
{
/* Reference count to this aspath. */
unsigned long refcnt;
/* Rawdata length. */
int length;
/* AS count. */
int count;
/* Rawdata. */
caddr_t data;
/* String expression of AS path. This string is used by vty output
and AS path regular expression match. */
char *str;
};
#define ASPATH_STR_DEFAULT_LEN 32
/* Prototypes. */
void aspath_init ();
struct aspath *aspath_parse ();
struct aspath *aspath_dup (struct aspath *);
struct aspath *aspath_aggregate (struct aspath *, struct aspath *);
struct aspath *aspath_prepend (struct aspath *, struct aspath *);
struct aspath *aspath_add_seq (struct aspath *, as_t);
struct aspath *aspath_add_confed_seq (struct aspath *, as_t);
int aspath_cmp_left (struct aspath *, struct aspath *);
int aspath_cmp_left_confed (struct aspath *, struct aspath *);
struct aspath *aspath_delete_confed_seq (struct aspath *);
struct aspath *aspath_empty ();
struct aspath *aspath_empty_get ();
struct aspath *aspath_str2aspath (char *);
void aspath_free (struct aspath *);
struct aspath *aspath_intern (struct aspath *);
void aspath_unintern (struct aspath *);
const char *aspath_print (struct aspath *);
void aspath_print_vty (struct vty *, struct aspath *);
void aspath_print_all_vty (struct vty *);
unsigned int aspath_key_make (struct aspath *);
int aspath_loop_check (struct aspath *, as_t);
int aspath_private_as_check (struct aspath *);
int aspath_firstas_check (struct aspath *, as_t);
unsigned long aspath_count ();
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