lib/filter.h

/*
 * Route filtering function.
 * Copyright (C) 1998 Kunihiro Ishiguro
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2, or (at your
 * option) any later version.
 *
 * GNU Zebra is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU Zebra; see the file COPYING.  If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA. 
 */

#ifndef _ZEBRA_FILTER_H
#define _ZEBRA_FILTER_H

#include "if.h"

/* Filter direction.  */
#define FILTER_IN                 0
#define FILTER_OUT                1
#define FILTER_MAX                2

/* Filter type is made by `permit', `deny' and `dynamic'. */
enum filter_type 
{
  FILTER_DENY,
  FILTER_PERMIT,
  FILTER_DYNAMIC
};

enum access_type
{
  ACCESS_TYPE_STRING,
  ACCESS_TYPE_NUMBER
};

/* Access list */
struct access_list
{
  char *name;
  char *remark;

  struct access_master *master;

  enum access_type type;

  struct access_list *next;
  struct access_list *prev;

  struct filter *head;
  struct filter *tail;
};

/* Prototypes for access-list. */
extern void access_list_init (void);
extern void access_list_reset (void);
extern void access_list_add_hook (void (*func)(struct access_list *));
extern void access_list_delete_hook (void (*func)(struct access_list *));
extern struct access_list *access_list_lookup (afi_t, const char *);
extern enum filter_type access_list_apply (struct access_list *, void *);

#endif /* _ZEBRA_FILTER_H */