/*
 * (C) 2008 Krzysztof Piotr Oledzki <ole@ans.pl>
 *
 * 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 _NF_CONNTRACK_ACCT_H
#define _NF_CONNTRACK_ACCT_H
#include <net/net_namespace.h>
#include <linux/netfilter/nf_conntrack_common.h>
#include <linux/netfilter/nf_conntrack_tuple_common.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_extend.h>

struct nf_conn_counter {
	u_int64_t packets;
	u_int64_t bytes;
};

static inline
struct nf_conn_counter *nf_conn_acct_find(const struct nf_conn *ct)
{
	return nf_ct_ext_find(ct, NF_CT_EXT_ACCT);
}

static inline
struct nf_conn_counter *nf_ct_acct_ext_add(struct nf_conn *ct, gfp_t gfp)
{
	struct net *net = nf_ct_net(ct);
	struct nf_conn_counter *acct;

	if (!net->ct.sysctl_acct)
		return NULL;

	acct = nf_ct_ext_add(ct, NF_CT_EXT_ACCT, gfp);
	if (!acct)
		pr_debug("failed to add accounting extension area");


	return acct;
};

extern unsigned int
seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir);

/* Check if connection tracking accounting is enabled */
static inline bool nf_ct_acct_enabled(struct net *net)
{
	return net->ct.sysctl_acct != 0;
}

/* Enable/disable connection tracking accounting */
static inline void nf_ct_set_acct(struct net *net, bool enable)
{
	net->ct.sysctl_acct = enable;
}

extern int nf_conntrack_acct_init(struct net *net);
extern void nf_conntrack_acct_fini(struct net *net);

#endif /* _NF_CONNTRACK_ACCT_H */