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 /* Community-list deny and permit.  */
  22 #define COMMUNITY_DENY                 0
  23 #define COMMUNITY_PERMIT               1
  24
  25 /* Number and string based community-list name.  */
  26 #define COMMUNITY_LIST_STRING          0
  27 #define COMMUNITY_LIST_NUMBER          1
  28
  29 /* Community-list entry types.  */
  30 #define COMMUNITY_LIST_STANDARD        0 /* Standard community-list.  */
  31 #define COMMUNITY_LIST_EXPANDED        1 /* Expanded community-list.  */
  32 #define COMMUNITY_LIST_AUTO            2 /* Automatically detected.  */
  33 #define EXTCOMMUNITY_LIST_STANDARD     3 /* Standard extcommunity-list.  */
  34 #define EXTCOMMUNITY_LIST_EXPANDED     4 /* Expanded extcommunity-list.  */
  35 #define EXTCOMMUNITY_LIST_AUTO         5 /* Automatically detected.  */
  36
  37 /* Community-list.  */
  38 struct community_list
  39 {
  40   /* Name of the community-list.  */
  41   char *name;
  42
  43   /* String or number.  */
  44   int sort;
  45
  46   /* Link to upper list.  */
  47   struct community_list_list *parent;
  48
  49   /* Linked list for other community-list.  */
  50   struct community_list *next;
  51   struct community_list *prev;
  52
  53   /* Community-list entry in this community-list.  */
  54   struct community_entry *head;
  55   struct community_entry *tail;
  56 };
  57
  58 /* Each entry in community-list.  */
  59 struct community_entry
  60 {
  61   struct community_entry *next;
  62   struct community_entry *prev;
  63
  64   /* Permit or deny.  */
  65   u_char direct;
  66
  67   /* Standard or expanded.  */
  68   u_char style;
  69
  70   /* Any match.  */
  71   u_char any;
  72
  73   /* Community structure.  */
  74   union
  75   {
  76     struct community *com;
  77     struct ecommunity *ecom;
  78   } u;
  79
  80   /* Configuration string.  */
  81   char *config;
  82
  83   /* Expanded community-list regular expression.  */
  84   regex_t *reg;
  85 };
  86
  87 /* Linked list of community-list.  */
  88 struct community_list_list
  89 {
  90   struct community_list *head;
  91   struct community_list *tail;
  92 };
  93
  94 /* Master structure of community-list and extcommunity-list.  */
  95 struct community_list_master
  96 {
  97   struct community_list_list num;
  98   struct community_list_list str;
  99 };
 100
 101 /* Community-list handler.  community_list_init() returns this
 102    structure as handler.  */
 103 struct community_list_handler
 104 {
 105   /* Community-list.  */
 106   struct community_list_master community_list;
 107
 108   /* Exteded community-list.  */
 109   struct community_list_master extcommunity_list;
 110 };
 111
 112 /* Error code of community-list.  */
 113 #define COMMUNITY_LIST_ERR_CANT_FIND_LIST        -1
 114 #define COMMUNITY_LIST_ERR_MALFORMED_VAL         -2
 115 #define COMMUNITY_LIST_ERR_STANDARD_CONFLICT     -3
 116 #define COMMUNITY_LIST_ERR_EXPANDED_CONFLICT     -4
 117
 118 /* Handler.  */
 119 extern struct community_list_handler *bgp_clist;
 120
 121 /* Prototypes.  */
 122 struct community_list_handler *community_list_init ();
 123
 124 int community_list_set (struct community_list_handler *ch, const char *name,
 125                         const char *str, int direct, int style);
 126 int community_list_unset (struct community_list_handler *ch, const char *name,
 127                           const char *str, int direct, int style);
 128 int extcommunity_list_set (struct community_list_handler *ch, const char *name,
 129                            const char *str, int direct, int style);
 130 int extcommunity_list_unset (struct community_list_handler *ch,
 131                              const char *name, const char *str,
 132                              int direct, int style);
 133
 134 struct community_list_master *
 135 community_list_master_lookup (struct community_list_handler *, int);
 136
 137 struct community_list *
 138 community_list_lookup (struct community_list_handler *, const char *, int);
 139
 140 int community_list_match (struct community *, struct community_list *);
 141 int ecommunity_list_match (struct ecommunity *, struct community_list *);
 142 int community_list_exact_match (struct community *, struct community_list *);
 143 struct community *
 144 community_list_match_delete (struct community *,
 145                              struct community_list *);