[net-next-2.6.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>

#ifdef __KERNEL__
#include <linux/bitops.h>
#include <linux/compiler.h>
#include <asm/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 */
};

/* Add protocol helper include file here */
#include <linux/netfilter/nf_conntrack_ftp.h>
#include <linux/netfilter/nf_conntrack_pptp.h>
#include <linux/netfilter/nf_conntrack_h323.h>
#include <linux/netfilter/nf_conntrack_sane.h>
#include <linux/netfilter/nf_conntrack_sip.h>

/* per conntrack: application helper private data */
union nf_conntrack_help {
	/* insert conntrack helper private data (master) here */
	struct nf_ct_ftp_master ct_ftp_info;
	struct nf_ct_pptp_master ct_pptp_info;
	struct nf_ct_h323_master ct_h323_info;
	struct nf_ct_sane_master ct_sane_info;
	struct nf_ct_sip_master ct_sip_info;
};

#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 *helper;

	union nf_conntrack_help help;

	struct hlist_head expectations;

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

#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

	/* Storage reserved for other modules: */
	union nf_conntrack_proto proto;

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

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)
{
#ifdef CONFIG_NET_NS
	return ct->ct_net;
#else
	return &init_net;
#endif
}

/* 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 *vmalloced, int nulls);

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

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

extern void nf_conntrack_hash_insert(struct nf_conn *ct);
extern void nf_ct_delete_from_lists(struct nf_conn *ct);
extern void nf_ct_insert_dying_list(struct nf_conn *ct);

extern void nf_conntrack_flush_report(struct net *net, u32 pid, 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 s16 (*nf_ct_nat_offset)(const struct nf_conn *ct,
			       enum ip_conntrack_dir dir,
			       u32 seq);

/* Fake conntrack entry for untracked connections */
extern struct nf_conn nf_conntrack_untracked;

/* 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);
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 sk_buff *skb)
{
	return (skb->nfct == &nf_conntrack_untracked.ct_general);
}

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;

#define NF_CT_STAT_INC(net, count)	\
	__this_cpu_inc((net)->ct.stat->count)
#define NF_CT_STAT_INC_ATOMIC(net, count)		\
do {							\
	local_bh_disable();				\
	__this_cpu_inc((net)->ct.stat->count);		\
	local_bh_enable();				\
} while (0)

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

#endif /* __KERNEL__ */
#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
	17	#ifdef __KERNEL__
9fb9cbb1 YK	18	#include <linux/bitops.h>
	19	#include <linux/compiler.h>
	20	#include <asm/atomic.h>
	21
	22	#include <linux/netfilter/nf_conntrack_tcp.h>
2bc78049	23	#include <linux/netfilter/nf_conntrack_dccp.h>
9fb9cbb1	24	#include <linux/netfilter/nf_conntrack_sctp.h>
f09943fe	25	#include <linux/netfilter/nf_conntrack_proto_gre.h>
9fb9cbb1 YK	26	#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>
	27
	28	#include <net/netfilter/nf_conntrack_tuple.h>
	29
	30	/* per conntrack: protocol private data */
	31	union nf_conntrack_proto {
	32	/* insert conntrack proto private data here */
2bc78049	33	struct nf_ct_dccp dccp;
9fb9cbb1 YK	34	struct ip_ct_sctp sctp;
9fb9cbb1 YK	35	struct ip_ct_tcp tcp;
f09943fe	36	struct nf_ct_gre gre;
9fb9cbb1 YK	37	};
	38
	39	union nf_conntrack_expect_proto {
	40	/* insert expect proto private data here */
	41	};
	42
	43	/* Add protocol helper include file here */
	44	#include <linux/netfilter/nf_conntrack_ftp.h>
f09943fe	45	#include <linux/netfilter/nf_conntrack_pptp.h>
f587de0e	46	#include <linux/netfilter/nf_conntrack_h323.h>
6fecd198	47	#include <linux/netfilter/nf_conntrack_sane.h>
0f32a40f	48	#include <linux/netfilter/nf_conntrack_sip.h>
9fb9cbb1 YK	49
	50	/* per conntrack: application helper private data */
	51	union nf_conntrack_help {
	52	/* insert conntrack helper private data (master) here */
55a73324	53	struct nf_ct_ftp_master ct_ftp_info;
f09943fe	54	struct nf_ct_pptp_master ct_pptp_info;
f587de0e	55	struct nf_ct_h323_master ct_h323_info;
6fecd198	56	struct nf_ct_sane_master ct_sane_info;
0f32a40f	57	struct nf_ct_sip_master ct_sip_info;
9fb9cbb1 YK	58	};
	59
	60	#include <linux/types.h>
	61	#include <linux/skbuff.h>
d7fe0f24	62	#include <linux/timer.h>
9fb9cbb1 YK	63
9fb9cbb1 YK	64	#ifdef CONFIG_NETFILTER_DEBUG
55871d04	65	#define NF_CT_ASSERT(x) WARN_ON(!(x))
9fb9cbb1 YK	66	#else
	67	#define NF_CT_ASSERT(x)
	68	#endif
	69
	70	struct nf_conntrack_helper;
	71
6002f266	72	/* Must be kept in sync with the classes defined by helpers */
9d288dff	73	#define NF_CT_MAX_EXPECT_CLASSES 4
6002f266	74
dc808fe2 HW	75	/* nf_conn feature for connections that have a helper */
	76	struct nf_conn_help {
	77	/* Helper. if any */
	78	struct nf_conntrack_helper *helper;
	79
	80	union nf_conntrack_help help;
	81
b560580a PM	82	struct hlist_head expectations;
b560580a PM	83
dc808fe2	84	/* Current number of expected connections */
6002f266	85	u8 expecting[NF_CT_MAX_EXPECT_CLASSES];
dc808fe2 HW	86	};
dc808fe2 HW	87
9fb9cbb1	88	#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
f8eb24a8 PM	89	#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
f8eb24a8 PM	90
ea781f19	91	struct nf_conn {
9fb9cbb1 YK	92	/* Usage count in here is 1 for hash table/destruct timer, 1 per skb,
	93	plus 1 for any connection(s) we are `master' for */
	94	struct nf_conntrack ct_general;
	95
440f0d58 PM	96	spinlock_t lock;
440f0d58 PM	97
9fb9cbb1 YK	98	/* XXX should I move this to the tail ? - Y.K */
	99	/* These are my tuples; original and reply */
	100	struct nf_conntrack_tuple_hash tuplehash[IP_CT_DIR_MAX];
	101
	102	/* Have we seen traffic both ways yet? (bitset) */
	103	unsigned long status;
	104
dc808fe2 HW	105	/* If we were expected by an expectation, this will be it */
	106	struct nf_conn *master;
	107
9fb9cbb1 YK	108	/* Timer function; drops refcnt when it goes off. */
	109	struct timer_list timeout;
	110
9fb9cbb1 YK	111	#if defined(CONFIG_NF_CONNTRACK_MARK)
	112	u_int32_t mark;
	113	#endif
	114
7c9728c3 JM	115	#ifdef CONFIG_NF_CONNTRACK_SECMARK
	116	u_int32_t secmark;
	117	#endif
	118
dc808fe2 HW	119	/* Storage reserved for other modules: */
dc808fe2 HW	120	union nf_conntrack_proto proto;
9fb9cbb1	121
ecfab2c9 YK	122	/* Extensions */
ecfab2c9 YK	123	struct nf_ct_ext *ext;
5a1fb391 AD	124	#ifdef CONFIG_NET_NS
	125	struct net *ct_net;
	126	#endif
9fb9cbb1 YK	127	};
9fb9cbb1 YK	128
9fb9cbb1 YK	129	static inline struct nf_conn *
	130	nf_ct_tuplehash_to_ctrack(const struct nf_conntrack_tuple_hash *hash)
	131	{
	132	return container_of(hash, struct nf_conn,
	133	tuplehash[hash->tuple.dst.dir]);
	134	}
	135
5e8fbe2a PM	136	static inline u_int16_t nf_ct_l3num(const struct nf_conn *ct)
	137	{
	138	return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
	139	}
	140
	141	static inline u_int8_t nf_ct_protonum(const struct nf_conn *ct)
	142	{
	143	return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum;
	144	}
	145
f2f3e38c PNA	146	#define nf_ct_tuple(ct, dir) (&(ct)->tuplehash[dir].tuple)
f2f3e38c PNA	147
9fb9cbb1 YK	148	/* get master conntrack via master expectation */
	149	#define master_ct(conntr) (conntr->master)
	150
5a1fb391 AD	151	extern struct net init_net;
	152
	153	static inline struct net nf_ct_net(const struct nf_conn ct)
	154	{
	155	#ifdef CONFIG_NET_NS
	156	return ct->ct_net;
	157	#else
	158	return &init_net;
	159	#endif
	160	}
	161
9fb9cbb1 YK	162	/* Alter reply tuple (maybe alter helper). */
9fb9cbb1 YK	163	extern void
c88130bc	164	nf_conntrack_alter_reply(struct nf_conn *ct,
9fb9cbb1 YK	165	const struct nf_conntrack_tuple *newreply);
	166
	167	/* Is this tuple taken? (ignoring any belonging to the given
	168	conntrack). */
	169	extern int
	170	nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
	171	const struct nf_conn *ignored_conntrack);
	172
	173	/* Return conntrack_info and tuple hash for given skb. */
	174	static inline struct nf_conn *
	175	nf_ct_get(const struct sk_buff skb, enum ip_conntrack_info ctinfo)
	176	{
	177	*ctinfo = skb->nfctinfo;
	178	return (struct nf_conn *)skb->nfct;
	179	}
	180
	181	/* decrement reference count on a conntrack */
	182	static inline void nf_ct_put(struct nf_conn *ct)
	183	{
	184	NF_CT_ASSERT(ct);
	185	nf_conntrack_put(&ct->ct_general);
	186	}
	187
b9f78f9f PNA	188	/* Protocol module loading */
	189	extern int nf_ct_l3proto_try_module_get(unsigned short l3proto);
	190	extern void nf_ct_l3proto_module_put(unsigned short l3proto);
	191
ea781f19 ED	192	/*
	193	* Allocate a hashtable of hlist_head (if nulls == 0),
	194	* or hlist_nulls_head (if nulls == 1)
	195	*/
	196	extern void nf_ct_alloc_hashtable(unsigned int sizep, int *vmalloced, int nulls);
	197
	198	extern void nf_ct_free_hashtable(void *hash, int vmalloced, unsigned int size);
ac565e5f	199
c1d10adb	200	extern struct nf_conntrack_tuple_hash *
5d0aa2cc PM	201	__nf_conntrack_find(struct net *net, u16 zone,
5d0aa2cc PM	202	const struct nf_conntrack_tuple *tuple);
c1d10adb PNA	203
c1d10adb PNA	204	extern void nf_conntrack_hash_insert(struct nf_conn *ct);
dd7669a9 PNA	205	extern void nf_ct_delete_from_lists(struct nf_conn *ct);
dd7669a9 PNA	206	extern void nf_ct_insert_dying_list(struct nf_conn *ct);
c1d10adb	207
274d383b	208	extern void nf_conntrack_flush_report(struct net *net, u32 pid, int report);
c1d10adb	209
5f2b4c90 JE	210	extern bool nf_ct_get_tuplepr(const struct sk_buff *skb,
	211	unsigned int nhoff, u_int16_t l3num,
	212	struct nf_conntrack_tuple *tuple);
	213	extern bool nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse,
	214	const struct nf_conntrack_tuple *orig);
9fb9cbb1 YK	215
	216	extern void __nf_ct_refresh_acct(struct nf_conn *ct,
	217	enum ip_conntrack_info ctinfo,
	218	const struct sk_buff *skb,
	219	unsigned long extra_jiffies,
	220	int do_acct);
	221
	222	/* Refresh conntrack for this many jiffies and do accounting */
	223	static inline void nf_ct_refresh_acct(struct nf_conn *ct,
	224	enum ip_conntrack_info ctinfo,
	225	const struct sk_buff *skb,
	226	unsigned long extra_jiffies)
	227	{
	228	__nf_ct_refresh_acct(ct, ctinfo, skb, extra_jiffies, 1);
	229	}
	230
	231	/* Refresh conntrack for this many jiffies */
	232	static inline void nf_ct_refresh(struct nf_conn *ct,
	233	const struct sk_buff *skb,
	234	unsigned long extra_jiffies)
	235	{
	236	__nf_ct_refresh_acct(ct, 0, skb, extra_jiffies, 0);
	237	}
	238
4c889498 DM	239	extern bool __nf_ct_kill_acct(struct nf_conn *ct,
	240	enum ip_conntrack_info ctinfo,
	241	const struct sk_buff *skb,
	242	int do_acct);
718d4ad9 FH	243
718d4ad9 FH	244	/* kill conntrack and do accounting */
4c889498 DM	245	static inline bool nf_ct_kill_acct(struct nf_conn *ct,
	246	enum ip_conntrack_info ctinfo,
	247	const struct sk_buff *skb)
718d4ad9	248	{
4c889498	249	return __nf_ct_kill_acct(ct, ctinfo, skb, 1);
718d4ad9 FH	250	}
	251
	252	/* kill conntrack without accounting */
4c889498	253	static inline bool nf_ct_kill(struct nf_conn *ct)
718d4ad9	254	{
4c889498	255	return __nf_ct_kill_acct(ct, 0, NULL, 0);
718d4ad9	256	}
51091764	257
9fb9cbb1	258	/* These are for NAT. Icky. */
f9dd09c7 JK	259	extern s16 (nf_ct_nat_offset)(const struct nf_conn ct,
	260	enum ip_conntrack_dir dir,
	261	u32 seq);
9fb9cbb1	262
9fb9cbb1 YK	263	/* Fake conntrack entry for untracked connections */
	264	extern struct nf_conn nf_conntrack_untracked;
	265
9fb9cbb1 YK	266	/* Iterate over all conntracks: if iter returns true, it's deleted. */
9fb9cbb1 YK	267	extern void
400dad39	268	nf_ct_iterate_cleanup(struct net net, int (iter)(struct nf_conn i, void data), void *data);
9fb9cbb1 YK	269	extern void nf_conntrack_free(struct nf_conn *ct);
9fb9cbb1 YK	270	extern struct nf_conn *
5d0aa2cc	271	nf_conntrack_alloc(struct net *net, u16 zone,
5a1fb391	272	const struct nf_conntrack_tuple *orig,
b891c5a8 PNA	273	const struct nf_conntrack_tuple *repl,
b891c5a8 PNA	274	gfp_t gfp);
9fb9cbb1	275
b2a15a60 PM	276	static inline int nf_ct_is_template(const struct nf_conn *ct)
	277	{
	278	return test_bit(IPS_TEMPLATE_BIT, &ct->status);
	279	}
	280
9fb9cbb1 YK	281	/* It's confirmed if it is, or has been in the hash table. */
	282	static inline int nf_ct_is_confirmed(struct nf_conn *ct)
	283	{
	284	return test_bit(IPS_CONFIRMED_BIT, &ct->status);
	285	}
	286
	287	static inline int nf_ct_is_dying(struct nf_conn *ct)
	288	{
	289	return test_bit(IPS_DYING_BIT, &ct->status);
	290	}
	291
587aa641 PM	292	static inline int nf_ct_is_untracked(const struct sk_buff *skb)
	293	{
	294	return (skb->nfct == &nf_conntrack_untracked.ct_general);
	295	}
	296
fae718dd	297	extern int nf_conntrack_set_hashsize(const char val, struct kernel_param kp);
9fb9cbb1	298	extern unsigned int nf_conntrack_htable_size;
e478075c	299	extern unsigned int nf_conntrack_max;
9fb9cbb1	300
0d55af87	301	#define NF_CT_STAT_INC(net, count) \
4ea7334b	302	__this_cpu_inc((net)->ct.stat->count)
0d55af87	303	#define NF_CT_STAT_INC_ATOMIC(net, count) \
c0e912d7 PM	304	do { \
c0e912d7 PM	305	local_bh_disable(); \
4ea7334b	306	__this_cpu_inc((net)->ct.stat->count); \
c0e912d7 PM	307	local_bh_enable(); \
c0e912d7 PM	308	} while (0)
9fb9cbb1	309
4dc06f96 PNA	310	#define MODULE_ALIAS_NFCT_HELPER(helper) \
	311	MODULE_ALIAS("nfct-helper-" helper)
	312
9fb9cbb1 YK	313	#endif /* __KERNEL__ */
9fb9cbb1 YK	314	#endif /* _NF_CONNTRACK_H */