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Annotation of embedaddon/quagga/bgpd/bgp_aspath.h, revision 1.1

1.1     ! misho       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: 
        !            21: #ifndef _QUAGGA_BGP_ASPATH_H
        !            22: #define _QUAGGA_BGP_ASPATH_H
        !            23: 
        !            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.  */
        !            31: #define BGP_PRIVATE_AS_MIN       64512U
        !            32: #define BGP_PRIVATE_AS_MAX       65535U
        !            33: 
        !            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
        !            39: 
        !            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: 
        !            49: /* AS path may be include some AsSegments.  */
        !            50: struct aspath 
        !            51: {
        !            52:   /* Reference count to this aspath.  */
        !            53:   unsigned long refcnt;
        !            54: 
        !            55:   /* segment data */
        !            56:   struct assegment *segments;
        !            57:   
        !            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. */
        !            66: extern void aspath_init (void);
        !            67: extern void aspath_finish (void);
        !            68: extern struct aspath *aspath_parse (struct stream *, size_t, int);
        !            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 *);
        !            72: extern struct aspath *aspath_filter_exclude (struct aspath *, struct aspath *);
        !            73: extern struct aspath *aspath_add_seq (struct aspath *, as_t);
        !            74: extern struct aspath *aspath_add_confed_seq (struct aspath *, as_t);
        !            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 *);
        !            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 *);
        !            85: extern void aspath_print_vty (struct vty *, const char *, struct aspath *, const char *);
        !            86: extern void aspath_print_all_vty (struct vty *);
        !            87: extern unsigned int aspath_key_make (void *);
        !            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 int aspath_confed_check (struct aspath *);
        !            92: extern int aspath_left_confed_check (struct aspath *);
        !            93: extern unsigned long aspath_count (void);
        !            94: extern unsigned int aspath_count_hops (struct aspath *);
        !            95: extern unsigned int aspath_count_confeds (struct aspath *);
        !            96: extern unsigned int aspath_size (struct aspath *);
        !            97: extern as_t aspath_highest (struct aspath *);
        !            98: extern size_t aspath_put (struct stream *, struct aspath *, int);
        !            99: 
        !           100: extern struct aspath *aspath_reconcile_as4 (struct aspath *, struct aspath *);
        !           101: extern unsigned int aspath_has_as4 (struct aspath *);
        !           102: 
        !           103: /* For SNMP BGP4PATHATTRASPATHSEGMENT, might be useful for debug */
        !           104: extern u_char *aspath_snmp_pathseg (struct aspath *, size_t *);
        !           105: 
        !           106: #endif /* _QUAGGA_BGP_ASPATH_H */