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/*
chronyd/chronyc - Programs for keeping computer clocks accurate.
**********************************************************************
* Copyright (C) Richard P. Curnow 1997-2002
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
**********************************************************************
=======================================================================
Module for providing an authorisation filter on IP addresses
*/
#ifndef GOT_ADDRFILT_H
#define GOT_ADDRFILT_H
#include "addressing.h"
typedef struct ADF_AuthTableInst *ADF_AuthTable;
typedef enum {
ADF_SUCCESS,
ADF_BADSUBNET
} ADF_Status;
/* Create a new table. The default rule is deny for everything */
extern ADF_AuthTable ADF_CreateTable(void);
/* Allow anything in the supplied subnet, EXCEPT for any more specific
subnets that are already defined */
extern ADF_Status ADF_Allow(ADF_AuthTable table,
IPAddr *ip,
int subnet_bits);
/* Allow anything in the supplied subnet, overwriting existing
definitions for any more specific subnets */
extern ADF_Status ADF_AllowAll(ADF_AuthTable table,
IPAddr *ip,
int subnet_bits);
/* Deny anything in the supplied subnet, EXCEPT for any more specific
subnets that are already defined */
extern ADF_Status ADF_Deny(ADF_AuthTable table,
IPAddr *ip,
int subnet_bits);
/* Deny anything in the supplied subnet, overwriting existing
definitions for any more specific subnets */
extern ADF_Status ADF_DenyAll(ADF_AuthTable table,
IPAddr *ip,
int subnet_bits);
/* Clear up the table */
extern void ADF_DestroyTable(ADF_AuthTable table);
/* Check whether a given IP address is allowed by the rules in
the table */
extern int ADF_IsAllowed(ADF_AuthTable table,
IPAddr *ip);
/* Check if at least one address from a given family is allowed by
the rules in the table */
extern int ADF_IsAnyAllowed(ADF_AuthTable table,
int family);
#endif /* GOT_ADDRFILT_H */
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