lib/filter.h

   1 /*
   2  * Route filtering function.
   3  * Copyright (C) 1998 Kunihiro Ishiguro
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation; either version 2, or (at your
  10  * option) any later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #ifndef _ZEBRA_FILTER_H
  23 #define _ZEBRA_FILTER_H
  24
  25 #include "if.h"
  26
  27 /* Maximum ACL name length */
  28 #define ACL_NAMSIZ                128
  29
  30 /* Filter direction.  */
  31 #define FILTER_IN                 0
  32 #define FILTER_OUT                1
  33 #define FILTER_MAX                2
  34
  35 /* Filter type is made by `permit', `deny' and `dynamic'. */
  36 enum filter_type
  37 {
  38   FILTER_DENY,
  39   FILTER_PERMIT,
  40   FILTER_DYNAMIC
  41 };
  42
  43 enum access_type
  44 {
  45   ACCESS_TYPE_STRING,
  46   ACCESS_TYPE_NUMBER
  47 };
  48
  49 /* Access list */
  50 struct access_list
  51 {
  52   char *name;
  53   char *remark;
  54
  55   struct access_master *master;
  56
  57   enum access_type type;
  58
  59   struct access_list *next;
  60   struct access_list *prev;
  61
  62   struct filter *head;
  63   struct filter *tail;
  64 };
  65
  66 /* Prototypes for access-list. */
  67 extern void access_list_init (void);
  68 extern void access_list_reset (void);
  69 extern void access_list_add_hook (void (*func)(struct access_list *));
  70 extern void access_list_delete_hook (void (*func)(struct access_list *));
  71 extern struct access_list *access_list_lookup (afi_t, const char *);
  72 extern enum filter_type access_list_apply (struct access_list *, void *);
  73
  74 #endif /* _ZEBRA_FILTER_H */