bgpd/bgp_aspath.h

   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 #define BGP_AS_MAX               65535U
  35
  36 /* AS path may be include some AsSegments.  */
  37 struct aspath
  38 {
  39   /* Reference count to this aspath.  */
  40   unsigned long refcnt;
  41
  42   /* Rawdata length.  */
  43   int length;
  44
  45   /* AS count.  */
  46   int count;
  47
  48   /* Confederation set/segment AS count. */
  49   int confed_count;
  50
  51   /* Rawdata.  */
  52   caddr_t data;
  53
  54   /* String expression of AS path.  This string is used by vty output
  55      and AS path regular expression match.  */
  56   char *str;
  57 };
  58
  59 #define ASPATH_STR_DEFAULT_LEN 32
  60
  61 /* Prototypes. */
  62 void aspath_init ();
  63 struct aspath *aspath_parse ();
  64 struct aspath *aspath_dup (struct aspath *);
  65 struct aspath *aspath_aggregate (struct aspath *, struct aspath *);
  66 struct aspath *aspath_prepend (struct aspath *, struct aspath *);
  67 struct aspath *aspath_add_seq (struct aspath *, as_t);
  68 struct aspath *aspath_add_confed_seq (struct aspath *, as_t);
  69 int aspath_cmp_left (struct aspath *, struct aspath *);
  70 int aspath_cmp_left_confed (struct aspath *, struct aspath *);
  71 struct aspath *aspath_delete_confed_seq (struct aspath *);
  72 struct aspath *aspath_empty ();
  73 struct aspath *aspath_empty_get ();
  74 struct aspath *aspath_str2aspath (const char *);
  75 void aspath_free (struct aspath *);
  76 struct aspath *aspath_intern (struct aspath *);
  77 void aspath_unintern (struct aspath *);
  78 const char *aspath_print (struct aspath *);
  79 void aspath_print_vty (struct vty *, struct aspath *);
  80 void aspath_print_all_vty (struct vty *);
  81 unsigned int aspath_key_make (struct aspath *);
  82 int aspath_loop_check (struct aspath *, as_t);
  83 int aspath_private_as_check (struct aspath *);
  84 int aspath_firstas_check (struct aspath *, as_t);
  85 unsigned long aspath_count ();
  86
  87 #endif /* _QUAGGA_BGP_ASPATH_H */