/***************************************************************************
 *   Copyright (C) 2004 by Intra2net AG                                    *
 *   opensource@intra2net.com                                              *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License                  *
 *   version 2 as published by the Free Software Foundation;               *
 *                                                                         *
 ***************************************************************************/

#ifndef _IPT_ACCOUNT_H
#define _IPT_ACCOUNT_H

#define ACCOUNT_MAX_TABLES 32
#define ACCOUNT_TABLE_NAME_LEN 32
#define ACCOUNT_MAX_HANDLES 10

/* Structure for the userspace part of ipt_ACCOUNT */
struct ipt_account_info {
	u_int32_t net_ip;
	u_int32_t net_mask;
	char table_name[ACCOUNT_TABLE_NAME_LEN];
	int32_t table_nr;
};

/* Internal table structure, generated by check_entry() */
struct ipt_account_table
{
    char name[ACCOUNT_TABLE_NAME_LEN];        /* name of the table */
    unsigned int ip;                          /* base IP of network */
    unsigned int netmask;                     /* netmask of the network */
    unsigned char depth;                      /* size of network: 0: 8 bit, 1: 16bit, 2: 24 bit */
    unsigned int refcount;                    /* refcount of this table. if zero, destroy it */
    unsigned int itemcount;                   /* number of IPs in this table */
    void *data;                               /* pointer to the actual data, depending on netmask */
};

/* Internal handle structure */
struct ipt_account_handle
{
    unsigned int ip;                          /* base IP of network. Used for caculating the final IP during get_data() */
    unsigned char depth;                      /* size of network. See above for details */
    unsigned int itemcount;                   /* number of IPs in this table */
    void *data;                               /* pointer to the actual data, depending on size */
};

/* Handle structure for communication with the userspace library */
struct ipt_account_handle_sockopt
{
    unsigned int handle_nr;                   /* Used for HANDLE_FREE */
    char name[ACCOUNT_TABLE_NAME_LEN];        /* Used for HANDLE_PREPARE_READ/READ_FLUSH */
    unsigned int itemcount;                   /* Used for HANDLE_PREPARE_READ/READ_FLUSH */
};

/* Used for every IP entry */
/* Size is 16 bytes so that 256 (class C network) * 16 fits in one kernel (zero) page */
struct ipt_account_ip
{
    unsigned int src_packets;
    unsigned int src_bytes;
    unsigned int dst_packets;
    unsigned int dst_bytes;
};

/*
    Used for every IP when returning data
*/
struct ipt_account_handle_ip
{
    unsigned int ip;
    unsigned int src_packets;
    unsigned int src_bytes;
    unsigned int dst_packets;
    unsigned int dst_bytes;
};

/*
    The IPs are organized as an array so that direct slot
    calculations are possible.
    Only 8 bit networks are preallocated, 16/24 bit networks
    allocate their slots when needed -> very efficent.
*/
struct ipt_account_mask_24
{
    struct ipt_account_ip ip[256];    
};

struct ipt_account_mask_16
{
    struct ipt_account_mask_24 *mask_24[256];
};

struct ipt_account_mask_8
{
    struct ipt_account_mask_16 *mask_16[256];
};

#endif /*_IPT_ACCOUNT_H*/