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