[deliverable/linux.git] / include / net / netfilter / nf_conntrack.h

/*
 * Connection state tracking for netfilter.  This is separated from,
 * but required by, the (future) NAT layer; it can also be used by an iptables
 * extension.
 *
 * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
 *	- generalize L3 protocol dependent part.
 *
 * Derived from include/linux/netfiter_ipv4/ip_conntrack.h
 */

#ifndef _NF_CONNTRACK_H
#define _NF_CONNTRACK_H

#include <linux/netfilter/nf_conntrack_common.h>

#include <linux/bitops.h>
#include <linux/compiler.h>
#include <linux/atomic.h>

#include <linux/netfilter/nf_conntrack_tcp.h>
#include <linux/netfilter/nf_conntrack_dccp.h>
#include <linux/netfilter/nf_conntrack_sctp.h>
#include <linux/netfilter/nf_conntrack_proto_gre.h>
#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>

#include <net/netfilter/nf_conntrack_tuple.h>

/* per conntrack: protocol private data */
union nf_conntrack_proto {
	/* insert conntrack proto private data here */
	struct nf_ct_dccp dccp;
	struct ip_ct_sctp sctp;
	struct ip_ct_tcp tcp;
	struct nf_ct_gre gre;
};

union nf_conntrack_expect_proto {
	/* insert expect proto private data here */
};

#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/timer.h>

#ifdef CONFIG_NETFILTER_DEBUG
#define NF_CT_ASSERT(x)		WARN_ON(!(x))
#else
#define NF_CT_ASSERT(x)
#endif

struct nf_conntrack_helper;

/* Must be kept in sync with the classes defined by helpers */
#define NF_CT_MAX_EXPECT_CLASSES	4

/* nf_conn feature for connections that have a helper */
struct nf_conn_help {
	/* Helper. if any */
	struct nf_conntrack_helper __rcu *helper;

	struct hlist_head expectations;

	/* Current number of expected connections */
	u8 expecting[NF_CT_MAX_EXPECT_CLASSES];

	/* private helper information. */
	char data[];
};

#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>

struct nf_conn {
	/* Usage count in here is 1 for hash table/destruct timer, 1 per skb,
           plus 1 for any connection(s) we are `master' for */
	struct nf_conntrack ct_general;

	spinlock_t lock;

	/* XXX should I move this to the tail ? - Y.K */
	/* These are my tuples; original and reply */
	struct nf_conntrack_tuple_hash tuplehash[IP_CT_DIR_MAX];

	/* Have we seen traffic both ways yet? (bitset) */
	unsigned long status;

	/* If we were expected by an expectation, this will be it */
	struct nf_conn *master;

	/* Timer function; drops refcnt when it goes off. */
	struct timer_list timeout;

#if defined(CONFIG_NF_CONNTRACK_MARK)
	u_int32_t mark;
#endif

#ifdef CONFIG_NF_CONNTRACK_SECMARK
	u_int32_t secmark;
#endif

	/* Extensions */
	struct nf_ct_ext *ext;
#ifdef CONFIG_NET_NS
	struct net *ct_net;
#endif

	/* Storage reserved for other modules, must be the last member */
	union nf_conntrack_proto proto;
};

static inline struct nf_conn *
nf_ct_tuplehash_to_ctrack(const struct nf_conntrack_tuple_hash *hash)
{
	return container_of(hash, struct nf_conn,
			    tuplehash[hash->tuple.dst.dir]);
}

static inline u_int16_t nf_ct_l3num(const struct nf_conn *ct)
{
	return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
}

static inline u_int8_t nf_ct_protonum(const struct nf_conn *ct)
{
	return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum;
}

#define nf_ct_tuple(ct, dir) (&(ct)->tuplehash[dir].tuple)

/* get master conntrack via master expectation */
#define master_ct(conntr) (conntr->master)

extern struct net init_net;

static inline struct net *nf_ct_net(const struct nf_conn *ct)
{
	return read_pnet(&ct->ct_net);
}

/* Alter reply tuple (maybe alter helper). */
extern void
nf_conntrack_alter_reply(struct nf_conn *ct,
			 const struct nf_conntrack_tuple *newreply);

/* Is this tuple taken? (ignoring any belonging to the given
   conntrack). */
extern int
nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
			 const struct nf_conn *ignored_conntrack);

/* Return conntrack_info and tuple hash for given skb. */
static inline struct nf_conn *
nf_ct_get(const struct sk_buff *skb, enum ip_conntrack_info *ctinfo)
{
	*ctinfo = skb->nfctinfo;
	return (struct nf_conn *)skb->nfct;
}

/* decrement reference count on a conntrack */
static inline void nf_ct_put(struct nf_conn *ct)
{
	NF_CT_ASSERT(ct);
	nf_conntrack_put(&ct->ct_general);
}

/* Protocol module loading */
extern int nf_ct_l3proto_try_module_get(unsigned short l3proto);
extern void nf_ct_l3proto_module_put(unsigned short l3proto);

/*
 * Allocate a hashtable of hlist_head (if nulls == 0),
 * or hlist_nulls_head (if nulls == 1)
 */
extern void *nf_ct_alloc_hashtable(unsigned int *sizep, int nulls);

extern void nf_ct_free_hashtable(void *hash, unsigned int size);

extern struct nf_conntrack_tuple_hash *
__nf_conntrack_find(struct net *net, u16 zone,
		    const struct nf_conntrack_tuple *tuple);

extern int nf_conntrack_hash_check_insert(struct nf_conn *ct);
bool nf_ct_delete(struct nf_conn *ct, u32 pid, int report);

extern void nf_conntrack_flush_report(struct net *net, u32 portid, int report);

extern bool nf_ct_get_tuplepr(const struct sk_buff *skb,
			      unsigned int nhoff, u_int16_t l3num,
			      struct nf_conntrack_tuple *tuple);
extern bool nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse,
				 const struct nf_conntrack_tuple *orig);

extern void __nf_ct_refresh_acct(struct nf_conn *ct,
				 enum ip_conntrack_info ctinfo,
				 const struct sk_buff *skb,
				 unsigned long extra_jiffies,
				 int do_acct);

/* Refresh conntrack for this many jiffies and do accounting */
static inline void nf_ct_refresh_acct(struct nf_conn *ct,
				      enum ip_conntrack_info ctinfo,
				      const struct sk_buff *skb,
				      unsigned long extra_jiffies)
{
	__nf_ct_refresh_acct(ct, ctinfo, skb, extra_jiffies, 1);
}

/* Refresh conntrack for this many jiffies */
static inline void nf_ct_refresh(struct nf_conn *ct,
				 const struct sk_buff *skb,
				 unsigned long extra_jiffies)
{
	__nf_ct_refresh_acct(ct, 0, skb, extra_jiffies, 0);
}

extern bool __nf_ct_kill_acct(struct nf_conn *ct,
			      enum ip_conntrack_info ctinfo,
			      const struct sk_buff *skb,
			      int do_acct);

/* kill conntrack and do accounting */
static inline bool nf_ct_kill_acct(struct nf_conn *ct,
				   enum ip_conntrack_info ctinfo,
				   const struct sk_buff *skb)
{
	return __nf_ct_kill_acct(ct, ctinfo, skb, 1);
}

/* kill conntrack without accounting */
static inline bool nf_ct_kill(struct nf_conn *ct)
{
	return __nf_ct_kill_acct(ct, 0, NULL, 0);
}

/* These are for NAT.  Icky. */
extern s32 (*nf_ct_nat_offset)(const struct nf_conn *ct,
			       enum ip_conntrack_dir dir,
			       u32 seq);

/* Fake conntrack entry for untracked connections */
DECLARE_PER_CPU(struct nf_conn, nf_conntrack_untracked);
static inline struct nf_conn *nf_ct_untracked_get(void)
{
	return &__raw_get_cpu_var(nf_conntrack_untracked);
}
extern void nf_ct_untracked_status_or(unsigned long bits);

/* Iterate over all conntracks: if iter returns true, it's deleted. */
extern void
nf_ct_iterate_cleanup(struct net *net,
		      int (*iter)(struct nf_conn *i, void *data),
		      void *data, u32 portid, int report);
extern void nf_conntrack_free(struct nf_conn *ct);
extern struct nf_conn *
nf_conntrack_alloc(struct net *net, u16 zone,
		   const struct nf_conntrack_tuple *orig,
		   const struct nf_conntrack_tuple *repl,
		   gfp_t gfp);

static inline int nf_ct_is_template(const struct nf_conn *ct)
{
	return test_bit(IPS_TEMPLATE_BIT, &ct->status);
}

/* It's confirmed if it is, or has been in the hash table. */
static inline int nf_ct_is_confirmed(struct nf_conn *ct)
{
	return test_bit(IPS_CONFIRMED_BIT, &ct->status);
}

static inline int nf_ct_is_dying(struct nf_conn *ct)
{
	return test_bit(IPS_DYING_BIT, &ct->status);
}

static inline int nf_ct_is_untracked(const struct nf_conn *ct)
{
	return test_bit(IPS_UNTRACKED_BIT, &ct->status);
}

/* Packet is received from loopback */
static inline bool nf_is_loopback_packet(const struct sk_buff *skb)
{
	return skb->dev && skb->skb_iif && skb->dev->flags & IFF_LOOPBACK;
}

struct kernel_param;

extern int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp);
extern unsigned int nf_conntrack_htable_size;
extern unsigned int nf_conntrack_max;
extern unsigned int nf_conntrack_hash_rnd;
void init_nf_conntrack_hash_rnd(void);

#define NF_CT_STAT_INC(net, count)	  __this_cpu_inc((net)->ct.stat->count)
#define NF_CT_STAT_INC_ATOMIC(net, count) this_cpu_inc((net)->ct.stat->count)

#define MODULE_ALIAS_NFCT_HELPER(helper) \
        MODULE_ALIAS("nfct-helper-" helper)

#endif /* _NF_CONNTRACK_H */
Commit	Line	Data
9fb9cbb1 YK	1	/*
	2	* Connection state tracking for netfilter. This is separated from,
	3	* but required by, the (future) NAT layer; it can also be used by an iptables
	4	* extension.
	5	*
	6	* 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
	7	* - generalize L3 protocol dependent part.
	8	*
	9	* Derived from include/linux/netfiter_ipv4/ip_conntrack.h
	10	*/
	11
	12	#ifndef _NF_CONNTRACK_H
	13	#define _NF_CONNTRACK_H
	14
	15	#include <linux/netfilter/nf_conntrack_common.h>
	16
9fb9cbb1 YK	17	#include <linux/bitops.h>
9fb9cbb1 YK	18	#include <linux/compiler.h>
60063497	19	#include <linux/atomic.h>
9fb9cbb1 YK	20
9fb9cbb1 YK	21	#include <linux/netfilter/nf_conntrack_tcp.h>
2bc78049	22	#include <linux/netfilter/nf_conntrack_dccp.h>
9fb9cbb1	23	#include <linux/netfilter/nf_conntrack_sctp.h>
f09943fe	24	#include <linux/netfilter/nf_conntrack_proto_gre.h>
9fb9cbb1 YK	25	#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>
	26
	27	#include <net/netfilter/nf_conntrack_tuple.h>
	28
	29	/* per conntrack: protocol private data */
	30	union nf_conntrack_proto {
	31	/* insert conntrack proto private data here */
2bc78049	32	struct nf_ct_dccp dccp;
9fb9cbb1 YK	33	struct ip_ct_sctp sctp;
9fb9cbb1 YK	34	struct ip_ct_tcp tcp;
f09943fe	35	struct nf_ct_gre gre;
9fb9cbb1 YK	36	};
	37
	38	union nf_conntrack_expect_proto {
	39	/* insert expect proto private data here */
	40	};
	41
9fb9cbb1 YK	42	#include <linux/types.h>
9fb9cbb1 YK	43	#include <linux/skbuff.h>
d7fe0f24	44	#include <linux/timer.h>
9fb9cbb1 YK	45
9fb9cbb1 YK	46	#ifdef CONFIG_NETFILTER_DEBUG
55871d04	47	#define NF_CT_ASSERT(x) WARN_ON(!(x))
9fb9cbb1 YK	48	#else
	49	#define NF_CT_ASSERT(x)
	50	#endif
	51
	52	struct nf_conntrack_helper;
	53
6002f266	54	/* Must be kept in sync with the classes defined by helpers */
9d288dff	55	#define NF_CT_MAX_EXPECT_CLASSES 4
6002f266	56
dc808fe2 HW	57	/* nf_conn feature for connections that have a helper */
	58	struct nf_conn_help {
	59	/* Helper. if any */
0906a372	60	struct nf_conntrack_helper __rcu *helper;
dc808fe2	61
b560580a PM	62	struct hlist_head expectations;
b560580a PM	63
dc808fe2	64	/* Current number of expected connections */
6002f266	65	u8 expecting[NF_CT_MAX_EXPECT_CLASSES];
1afc5679 PNA	66
	67	/* private helper information. */
	68	char data[];
dc808fe2 HW	69	};
dc808fe2 HW	70
9fb9cbb1	71	#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
f8eb24a8 PM	72	#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
f8eb24a8 PM	73
ea781f19	74	struct nf_conn {
9fb9cbb1 YK	75	/* Usage count in here is 1 for hash table/destruct timer, 1 per skb,
	76	plus 1 for any connection(s) we are `master' for */
	77	struct nf_conntrack ct_general;
	78
440f0d58 PM	79	spinlock_t lock;
440f0d58 PM	80
9fb9cbb1 YK	81	/* XXX should I move this to the tail ? - Y.K */
	82	/* These are my tuples; original and reply */
	83	struct nf_conntrack_tuple_hash tuplehash[IP_CT_DIR_MAX];
	84
	85	/* Have we seen traffic both ways yet? (bitset) */
	86	unsigned long status;
	87
dc808fe2 HW	88	/* If we were expected by an expectation, this will be it */
	89	struct nf_conn *master;
	90
9fb9cbb1 YK	91	/* Timer function; drops refcnt when it goes off. */
	92	struct timer_list timeout;
	93
9fb9cbb1 YK	94	#if defined(CONFIG_NF_CONNTRACK_MARK)
	95	u_int32_t mark;
	96	#endif
	97
7c9728c3 JM	98	#ifdef CONFIG_NF_CONNTRACK_SECMARK
	99	u_int32_t secmark;
	100	#endif
	101
ecfab2c9 YK	102	/* Extensions */
ecfab2c9 YK	103	struct nf_ct_ext *ext;
5a1fb391 AD	104	#ifdef CONFIG_NET_NS
	105	struct net *ct_net;
	106	#endif
e5fc9e7a CG	107
	108	/* Storage reserved for other modules, must be the last member */
	109	union nf_conntrack_proto proto;
9fb9cbb1 YK	110	};
9fb9cbb1 YK	111
9fb9cbb1 YK	112	static inline struct nf_conn *
	113	nf_ct_tuplehash_to_ctrack(const struct nf_conntrack_tuple_hash *hash)
	114	{
	115	return container_of(hash, struct nf_conn,
	116	tuplehash[hash->tuple.dst.dir]);
	117	}
	118
5e8fbe2a PM	119	static inline u_int16_t nf_ct_l3num(const struct nf_conn *ct)
	120	{
	121	return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
	122	}
	123
	124	static inline u_int8_t nf_ct_protonum(const struct nf_conn *ct)
	125	{
	126	return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum;
	127	}
	128
f2f3e38c PNA	129	#define nf_ct_tuple(ct, dir) (&(ct)->tuplehash[dir].tuple)
f2f3e38c PNA	130
9fb9cbb1 YK	131	/* get master conntrack via master expectation */
	132	#define master_ct(conntr) (conntr->master)
	133
5a1fb391 AD	134	extern struct net init_net;
	135
	136	static inline struct net nf_ct_net(const struct nf_conn ct)
	137	{
c2d9ba9b	138	return read_pnet(&ct->ct_net);
5a1fb391 AD	139	}
5a1fb391 AD	140
9fb9cbb1 YK	141	/* Alter reply tuple (maybe alter helper). */
9fb9cbb1 YK	142	extern void
c88130bc	143	nf_conntrack_alter_reply(struct nf_conn *ct,
9fb9cbb1 YK	144	const struct nf_conntrack_tuple *newreply);
	145
	146	/* Is this tuple taken? (ignoring any belonging to the given
	147	conntrack). */
	148	extern int
	149	nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
	150	const struct nf_conn *ignored_conntrack);
	151
	152	/* Return conntrack_info and tuple hash for given skb. */
	153	static inline struct nf_conn *
	154	nf_ct_get(const struct sk_buff skb, enum ip_conntrack_info ctinfo)
	155	{
	156	*ctinfo = skb->nfctinfo;
	157	return (struct nf_conn *)skb->nfct;
	158	}
	159
	160	/* decrement reference count on a conntrack */
	161	static inline void nf_ct_put(struct nf_conn *ct)
	162	{
	163	NF_CT_ASSERT(ct);
	164	nf_conntrack_put(&ct->ct_general);
	165	}
	166
b9f78f9f PNA	167	/* Protocol module loading */
	168	extern int nf_ct_l3proto_try_module_get(unsigned short l3proto);
	169	extern void nf_ct_l3proto_module_put(unsigned short l3proto);
	170
ea781f19 ED	171	/*
	172	* Allocate a hashtable of hlist_head (if nulls == 0),
	173	* or hlist_nulls_head (if nulls == 1)
	174	*/
d862a662	175	extern void nf_ct_alloc_hashtable(unsigned int sizep, int nulls);
ea781f19	176
d862a662	177	extern void nf_ct_free_hashtable(void *hash, unsigned int size);
ac565e5f	178
c1d10adb	179	extern struct nf_conntrack_tuple_hash *
5d0aa2cc PM	180	__nf_conntrack_find(struct net *net, u16 zone,
5d0aa2cc PM	181	const struct nf_conntrack_tuple *tuple);
c1d10adb	182
7d367e06	183	extern int nf_conntrack_hash_check_insert(struct nf_conn *ct);
02982c27	184	bool nf_ct_delete(struct nf_conn *ct, u32 pid, int report);
c1d10adb	185
ec464e5d	186	extern void nf_conntrack_flush_report(struct net *net, u32 portid, int report);
c1d10adb	187
5f2b4c90 JE	188	extern bool nf_ct_get_tuplepr(const struct sk_buff *skb,
	189	unsigned int nhoff, u_int16_t l3num,
	190	struct nf_conntrack_tuple *tuple);
	191	extern bool nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse,
	192	const struct nf_conntrack_tuple *orig);
9fb9cbb1 YK	193
	194	extern void __nf_ct_refresh_acct(struct nf_conn *ct,
	195	enum ip_conntrack_info ctinfo,
	196	const struct sk_buff *skb,
	197	unsigned long extra_jiffies,
	198	int do_acct);
	199
	200	/* Refresh conntrack for this many jiffies and do accounting */
	201	static inline void nf_ct_refresh_acct(struct nf_conn *ct,
	202	enum ip_conntrack_info ctinfo,
	203	const struct sk_buff *skb,
	204	unsigned long extra_jiffies)
	205	{
	206	__nf_ct_refresh_acct(ct, ctinfo, skb, extra_jiffies, 1);
	207	}
	208
	209	/* Refresh conntrack for this many jiffies */
	210	static inline void nf_ct_refresh(struct nf_conn *ct,
	211	const struct sk_buff *skb,
	212	unsigned long extra_jiffies)
	213	{
	214	__nf_ct_refresh_acct(ct, 0, skb, extra_jiffies, 0);
	215	}
	216
4c889498 DM	217	extern bool __nf_ct_kill_acct(struct nf_conn *ct,
	218	enum ip_conntrack_info ctinfo,
	219	const struct sk_buff *skb,
	220	int do_acct);
718d4ad9 FH	221
718d4ad9 FH	222	/* kill conntrack and do accounting */
4c889498 DM	223	static inline bool nf_ct_kill_acct(struct nf_conn *ct,
	224	enum ip_conntrack_info ctinfo,
	225	const struct sk_buff *skb)
718d4ad9	226	{
4c889498	227	return __nf_ct_kill_acct(ct, ctinfo, skb, 1);
718d4ad9 FH	228	}
	229
	230	/* kill conntrack without accounting */
4c889498	231	static inline bool nf_ct_kill(struct nf_conn *ct)
718d4ad9	232	{
4c889498	233	return __nf_ct_kill_acct(ct, 0, NULL, 0);
718d4ad9	234	}
51091764	235
9fb9cbb1	236	/* These are for NAT. Icky. */
2d89c68a	237	extern s32 (nf_ct_nat_offset)(const struct nf_conn ct,
f9dd09c7 JK	238	enum ip_conntrack_dir dir,
f9dd09c7 JK	239	u32 seq);
9fb9cbb1	240
9fb9cbb1	241	/* Fake conntrack entry for untracked connections */
b3c5163f	242	DECLARE_PER_CPU(struct nf_conn, nf_conntrack_untracked);
5bfddbd4 ED	243	static inline struct nf_conn *nf_ct_untracked_get(void)
5bfddbd4 ED	244	{
b3c5163f	245	return &__raw_get_cpu_var(nf_conntrack_untracked);
5bfddbd4 ED	246	}
5bfddbd4 ED	247	extern void nf_ct_untracked_status_or(unsigned long bits);
9fb9cbb1	248
9fb9cbb1 YK	249	/* Iterate over all conntracks: if iter returns true, it's deleted. */
9fb9cbb1 YK	250	extern void
c655bc68 FW	251	nf_ct_iterate_cleanup(struct net *net,
	252	int (iter)(struct nf_conn i, void *data),
	253	void *data, u32 portid, int report);
9fb9cbb1 YK	254	extern void nf_conntrack_free(struct nf_conn *ct);
9fb9cbb1 YK	255	extern struct nf_conn *
5d0aa2cc	256	nf_conntrack_alloc(struct net *net, u16 zone,
5a1fb391	257	const struct nf_conntrack_tuple *orig,
b891c5a8 PNA	258	const struct nf_conntrack_tuple *repl,
b891c5a8 PNA	259	gfp_t gfp);
9fb9cbb1	260
b2a15a60 PM	261	static inline int nf_ct_is_template(const struct nf_conn *ct)
	262	{
	263	return test_bit(IPS_TEMPLATE_BIT, &ct->status);
	264	}
	265
9fb9cbb1 YK	266	/* It's confirmed if it is, or has been in the hash table. */
	267	static inline int nf_ct_is_confirmed(struct nf_conn *ct)
	268	{
	269	return test_bit(IPS_CONFIRMED_BIT, &ct->status);
	270	}
	271
	272	static inline int nf_ct_is_dying(struct nf_conn *ct)
	273	{
	274	return test_bit(IPS_DYING_BIT, &ct->status);
	275	}
	276
5bfddbd4	277	static inline int nf_ct_is_untracked(const struct nf_conn *ct)
587aa641	278	{
5bfddbd4	279	return test_bit(IPS_UNTRACKED_BIT, &ct->status);
587aa641 PM	280	}
587aa641 PM	281
42c1edd3 JA	282	/* Packet is received from loopback */
	283	static inline bool nf_is_loopback_packet(const struct sk_buff *skb)
	284	{
	285	return skb->dev && skb->skb_iif && skb->dev->flags & IFF_LOOPBACK;
	286	}
	287
34641c6d PG	288	struct kernel_param;
34641c6d PG	289
fae718dd	290	extern int nf_conntrack_set_hashsize(const char val, struct kernel_param kp);
9fb9cbb1	291	extern unsigned int nf_conntrack_htable_size;
e478075c	292	extern unsigned int nf_conntrack_max;
f682cefa CG	293	extern unsigned int nf_conntrack_hash_rnd;
f682cefa CG	294	void init_nf_conntrack_hash_rnd(void);
9fb9cbb1	295
ac3a546a ED	296	#define NF_CT_STAT_INC(net, count) __this_cpu_inc((net)->ct.stat->count)
ac3a546a ED	297	#define NF_CT_STAT_INC_ATOMIC(net, count) this_cpu_inc((net)->ct.stat->count)
9fb9cbb1	298
4dc06f96 PNA	299	#define MODULE_ALIAS_NFCT_HELPER(helper) \
	300	MODULE_ALIAS("nfct-helper-" helper)
	301
9fb9cbb1	302	#endif /* _NF_CONNTRACK_H */