bgpd/bgp_clist.h

   1 /* BGP Community list.
   2    Copyright (C) 1999 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_CLIST_H
  22 #define _QUAGGA_BGP_CLIST_H
  23
  24 /* Master Community-list. */
  25 #define COMMUNITY_LIST_MASTER          0
  26 #define EXTCOMMUNITY_LIST_MASTER       1
  27
  28 /* Community-list deny and permit.  */
  29 #define COMMUNITY_DENY                 0
  30 #define COMMUNITY_PERMIT               1
  31
  32 /* Number and string based community-list name.  */
  33 #define COMMUNITY_LIST_STRING          0
  34 #define COMMUNITY_LIST_NUMBER          1
  35
  36 /* Community-list entry types.  */
  37 #define COMMUNITY_LIST_STANDARD        0 /* Standard community-list.  */
  38 #define COMMUNITY_LIST_EXPANDED        1 /* Expanded community-list.  */
  39 #define EXTCOMMUNITY_LIST_STANDARD     2 /* Standard extcommunity-list.  */
  40 #define EXTCOMMUNITY_LIST_EXPANDED     3 /* Expanded extcommunity-list.  */
  41
  42 /* Community-list.  */
  43 struct community_list
  44 {
  45   /* Name of the community-list.  */
  46   char *name;
  47
  48   /* String or number.  */
  49   int sort;
  50
  51   /* Link to upper list.  */
  52   struct community_list_list *parent;
  53
  54   /* Linked list for other community-list.  */
  55   struct community_list *next;
  56   struct community_list *prev;
  57
  58   /* Community-list entry in this community-list.  */
  59   struct community_entry *head;
  60   struct community_entry *tail;
  61 };
  62
  63 /* Each entry in community-list.  */
  64 struct community_entry
  65 {
  66   struct community_entry *next;
  67   struct community_entry *prev;
  68
  69   /* Permit or deny.  */
  70   u_char direct;
  71
  72   /* Standard or expanded.  */
  73   u_char style;
  74
  75   /* Any match.  */
  76   u_char any;
  77
  78   /* Community structure.  */
  79   union
  80   {
  81     struct community *com;
  82     struct ecommunity *ecom;
  83   } u;
  84
  85   /* Configuration string.  */
  86   char *config;
  87
  88   /* Expanded community-list regular expression.  */
  89   regex_t *reg;
  90 };
  91
  92 /* Linked list of community-list.  */
  93 struct community_list_list
  94 {
  95   struct community_list *head;
  96   struct community_list *tail;
  97 };
  98
  99 /* Master structure of community-list and extcommunity-list.  */
 100 struct community_list_master
 101 {
 102   struct community_list_list num;
 103   struct community_list_list str;
 104 };
 105
 106 /* Community-list handler.  community_list_init() returns this
 107    structure as handler.  */
 108 struct community_list_handler
 109 {
 110   /* Community-list.  */
 111   struct community_list_master community_list;
 112
 113   /* Exteded community-list.  */
 114   struct community_list_master extcommunity_list;
 115 };
 116
 117 /* Error code of community-list.  */
 118 #define COMMUNITY_LIST_ERR_CANT_FIND_LIST        -1
 119 #define COMMUNITY_LIST_ERR_MALFORMED_VAL         -2
 120 #define COMMUNITY_LIST_ERR_STANDARD_CONFLICT     -3
 121 #define COMMUNITY_LIST_ERR_EXPANDED_CONFLICT     -4
 122
 123 /* Handler.  */
 124 extern struct community_list_handler *bgp_clist;
 125
 126 /* Prototypes.  */
 127 struct community_list_handler *community_list_init ();
 128
 129 int community_list_set (struct community_list_handler *ch, const char *name,
 130                         const char *str, int direct, int style);
 131 int community_list_unset (struct community_list_handler *ch, const char *name,
 132                           const char *str, int direct, int style);
 133 int extcommunity_list_set (struct community_list_handler *ch, const char *name,
 134                            const char *str, int direct, int style);
 135 int extcommunity_list_unset (struct community_list_handler *ch,
 136                              const char *name, const char *str,
 137                              int direct, int style);
 138
 139 struct community_list_master *
 140 community_list_master_lookup (struct community_list_handler *, int);
 141
 142 struct community_list *
 143 community_list_lookup (struct community_list_handler *, const char *, int);
 144
 145 int community_list_match (struct community *, struct community_list *);
 146 int ecommunity_list_match (struct ecommunity *, struct community_list *);
 147 int community_list_exact_match (struct community *, struct community_list *);
 148 struct community *
 149 community_list_match_delete (struct community *,
 150                              struct community_list *);
 151
 152 #endif /* _QUAGGA_BGP_CLIST_H */