bgpd/bgp_ecommunity.h

   1 /* BGP Extended Communities Attribute.
   2    Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
   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_ECOMMUNITY_H
  22 #define _QUAGGA_BGP_ECOMMUNITY_H
  23
  24 /* High-order octet of the Extended Communities type field.  */
  25 #define ECOMMUNITY_ENCODE_AS                0x00
  26 #define ECOMMUNITY_ENCODE_IP                0x01
  27 #define ECOMMUNITY_ENCODE_AS4               0x02
  28 #define ECOMMUNITY_ENCODE_OPAQUE            0x03
  29
  30 /* Low-order octet of the Extended Communities type field.  */
  31 #define ECOMMUNITY_ROUTE_TARGET             0x02
  32 #define ECOMMUNITY_SITE_ORIGIN              0x03
  33
  34 /* Low-order octet of the Extended Communities type field for OPAQUE types */
  35 #define ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP     0x0c
  36
  37 /* Extended communities attribute string format.  */
  38 #define ECOMMUNITY_FORMAT_ROUTE_MAP            0
  39 #define ECOMMUNITY_FORMAT_COMMUNITY_LIST       1
  40 #define ECOMMUNITY_FORMAT_DISPLAY              2
  41
  42 /* Extended Communities value is eight octet long.  */
  43 #define ECOMMUNITY_SIZE                        8
  44
  45 /* Extended Communities type flag.  */
  46 #define ECOMMUNITY_FLAG_NON_TRANSITIVE      0x40
  47
  48 /* Extended Communities attribute.  */
  49 struct ecommunity
  50 {
  51   /* Reference counter.  */
  52   unsigned long refcnt;
  53
  54   /* Size of Extended Communities attribute.  */
  55   int size;
  56
  57   /* Extended Communities value.  */
  58   u_int8_t *val;
  59
  60   /* Human readable format string.  */
  61   char *str;
  62 };
  63
  64 /* Extended community value is eight octet.  */
  65 struct ecommunity_val
  66 {
  67   char val[ECOMMUNITY_SIZE];
  68 };
  69
  70 #define ecom_length(X)    ((X)->size * ECOMMUNITY_SIZE)
  71
  72 extern void ecommunity_init (void);
  73 extern void ecommunity_finish (void);
  74 extern void ecommunity_free (struct ecommunity **);
  75 extern struct ecommunity *ecommunity_parse (u_int8_t *, u_short);
  76 extern struct ecommunity *ecommunity_dup (struct ecommunity *);
  77 extern struct ecommunity *ecommunity_merge (struct ecommunity *, struct ecommunity *);
  78 extern struct ecommunity *ecommunity_uniq_sort (struct ecommunity *);
  79 extern struct ecommunity *ecommunity_intern (struct ecommunity *);
  80 extern int ecommunity_cmp (const void *, const void *);
  81 extern void ecommunity_unintern (struct ecommunity **);
  82 extern unsigned int ecommunity_hash_make (void *);
  83 extern struct ecommunity *ecommunity_str2com (const char *, int, int);
  84 extern char *ecommunity_ecom2str (struct ecommunity *, int);
  85 extern int ecommunity_match (const struct ecommunity *, const struct ecommunity *);
  86 extern char *ecommunity_str (struct ecommunity *);
  87
  88 /* for vpn */
  89 extern struct ecommunity *ecommunity_new (void);
  90 extern int ecommunity_add_val (struct ecommunity *, struct ecommunity_val *);
  91 #endif /* _QUAGGA_BGP_ECOMMUNITY_H */