1/* BGP Community list.
2   Copyright (C) 1999 Kunihiro Ishiguro
3
4This file is part of GNU Zebra.
5
6GNU Zebra is free software; you can redistribute it and/or modify it
7under the terms of the GNU General Public License as published by the
8Free Software Foundation; either version 2, or (at your option) any
9later version.
10
11GNU Zebra is distributed in the hope that it will be useful, but
12WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Zebra; see the file COPYING.  If not, write to the Free
18Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
1902111-1307, 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.  */
38struct 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.  */
59struct 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.  */
88struct 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.  */
95struct 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.  */
103struct 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.  */
119extern struct community_list_handler *bgp_clist;
120
121/* Prototypes.  */
122struct community_list_handler *community_list_init ();
123
124int community_list_set (struct community_list_handler *ch,
125			char *name, char *str, int direct, int style);
126int community_list_unset (struct community_list_handler *ch,
127			  char *name, char *str, int direct, int style);
128int extcommunity_list_set (struct community_list_handler *ch,
129			   char *name, char *str, int direct, int style);
130int extcommunity_list_unset (struct community_list_handler *ch,
131			     char *name, char *str, int direct, int style);
132
133struct community_list_master *
134community_list_master_lookup (struct community_list_handler *, int);
135
136struct community_list *
137community_list_lookup (struct community_list_handler *, char *, int);
138
139int community_list_match (struct community *, struct community_list *);
140int community_list_exact_match (struct community *, struct community_list *);
141struct community *
142community_list_match_delete (struct community *,
143			     struct community_list *);
144