[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / netfilter.h

#ifndef __LINUX_NETFILTER_H
#define __LINUX_NETFILTER_H

#ifdef __KERNEL__
#include <linux/init.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/net.h>
#include <linux/if.h>
#include <linux/wait.h>
#include <linux/list.h>
#endif
#include <linux/compiler.h>

/* Responses from hook functions. */
#define NF_DROP 0
#define NF_ACCEPT 1
#define NF_STOLEN 2
#define NF_QUEUE 3
#define NF_REPEAT 4
#define NF_STOP 5
#define NF_MAX_VERDICT NF_STOP

/* we overload the higher bits for encoding auxiliary data such as the queue
 * number. Not nice, but better than additional function arguments. */
#define NF_VERDICT_MASK 0x0000ffff
#define NF_VERDICT_BITS 16

#define NF_VERDICT_QMASK 0xffff0000
#define NF_VERDICT_QBITS 16

#define NF_QUEUE_NR(x) (((x << NF_VERDICT_QBITS) & NF_VERDICT_QMASK) | NF_QUEUE)

/* only for userspace compatibility */
#ifndef __KERNEL__
/* Generic cache responses from hook functions.
   <= 0x2000 is used for protocol-flags. */
#define NFC_UNKNOWN 0x4000
#define NFC_ALTERED 0x8000
#endif

enum nf_inet_hooks {
	NF_INET_PRE_ROUTING,
	NF_INET_LOCAL_IN,
	NF_INET_FORWARD,
	NF_INET_LOCAL_OUT,
	NF_INET_POST_ROUTING,
	NF_INET_NUMHOOKS
};

#ifdef __KERNEL__
#ifdef CONFIG_NETFILTER

extern void netfilter_init(void);

/* Largest hook number + 1 */
#define NF_MAX_HOOKS 8

struct sk_buff;
struct net_device;

typedef unsigned int nf_hookfn(unsigned int hooknum,
			       struct sk_buff *skb,
			       const struct net_device *in,
			       const struct net_device *out,
			       int (*okfn)(struct sk_buff *));

struct nf_hook_ops
{
	struct list_head list;

	/* User fills in from here down. */
	nf_hookfn *hook;
	struct module *owner;
	int pf;
	int hooknum;
	/* Hooks are ordered in ascending priority. */
	int priority;
};

struct nf_sockopt_ops
{
	struct list_head list;

	int pf;

	/* Non-inclusive ranges: use 0/0/NULL to never get called. */
	int set_optmin;
	int set_optmax;
	int (*set)(struct sock *sk, int optval, void __user *user, unsigned int len);
	int (*compat_set)(struct sock *sk, int optval,
			void __user *user, unsigned int len);

	int get_optmin;
	int get_optmax;
	int (*get)(struct sock *sk, int optval, void __user *user, int *len);
	int (*compat_get)(struct sock *sk, int optval,
			void __user *user, int *len);

	/* Use the module struct to lock set/get code in place */
	struct module *owner;
};

/* Function to register/unregister hook points. */
int nf_register_hook(struct nf_hook_ops *reg);
void nf_unregister_hook(struct nf_hook_ops *reg);
int nf_register_hooks(struct nf_hook_ops *reg, unsigned int n);
void nf_unregister_hooks(struct nf_hook_ops *reg, unsigned int n);

/* Functions to register get/setsockopt ranges (non-inclusive).  You
   need to check permissions yourself! */
int nf_register_sockopt(struct nf_sockopt_ops *reg);
void nf_unregister_sockopt(struct nf_sockopt_ops *reg);

#ifdef CONFIG_SYSCTL
/* Sysctl registration */
struct ctl_table_header *nf_register_sysctl_table(struct ctl_table *path,
						  struct ctl_table *table);
void nf_unregister_sysctl_table(struct ctl_table_header *header,
				struct ctl_table *table);
extern struct ctl_table nf_net_netfilter_sysctl_path[];
extern struct ctl_table nf_net_ipv4_netfilter_sysctl_path[];
#endif /* CONFIG_SYSCTL */

extern struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];

int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb,
		 struct net_device *indev, struct net_device *outdev,
		 int (*okfn)(struct sk_buff *), int thresh);

/**
 *	nf_hook_thresh - call a netfilter hook
 *	
 *	Returns 1 if the hook has allowed the packet to pass.  The function
 *	okfn must be invoked by the caller in this case.  Any other return
 *	value indicates the packet has been consumed by the hook.
 */
static inline int nf_hook_thresh(int pf, unsigned int hook,
				 struct sk_buff *skb,
				 struct net_device *indev,
				 struct net_device *outdev,
				 int (*okfn)(struct sk_buff *), int thresh,
				 int cond)
{
	if (!cond)
		return 1;
#ifndef CONFIG_NETFILTER_DEBUG
	if (list_empty(&nf_hooks[pf][hook]))
		return 1;
#endif
	return nf_hook_slow(pf, hook, skb, indev, outdev, okfn, thresh);
}

static inline int nf_hook(int pf, unsigned int hook, struct sk_buff *skb,
			  struct net_device *indev, struct net_device *outdev,
			  int (*okfn)(struct sk_buff *))
{
	return nf_hook_thresh(pf, hook, skb, indev, outdev, okfn, INT_MIN, 1);
}
                   
/* Activate hook; either okfn or kfree_skb called, unless a hook
   returns NF_STOLEN (in which case, it's up to the hook to deal with
   the consequences).

   Returns -ERRNO if packet dropped.  Zero means queued, stolen or
   accepted.
*/

/* RR:
   > I don't want nf_hook to return anything because people might forget
   > about async and trust the return value to mean "packet was ok".

   AK:
   Just document it clearly, then you can expect some sense from kernel
   coders :)
*/

/* This is gross, but inline doesn't cut it for avoiding the function
   call in fast path: gcc doesn't inline (needs value tracking?). --RR */

/* HX: It's slightly less gross now. */

#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh)	       \
({int __ret;								       \
if ((__ret=nf_hook_thresh(pf, hook, (skb), indev, outdev, okfn, thresh, 1)) == 1)\
	__ret = (okfn)(skb);						       \
__ret;})

#define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond)		       \
({int __ret;								       \
if ((__ret=nf_hook_thresh(pf, hook, (skb), indev, outdev, okfn, INT_MIN, cond)) == 1)\
	__ret = (okfn)(skb);						       \
__ret;})

#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \
	NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, INT_MIN)

/* Call setsockopt() */
int nf_setsockopt(struct sock *sk, int pf, int optval, char __user *opt, 
		  int len);
int nf_getsockopt(struct sock *sk, int pf, int optval, char __user *opt,
		  int *len);

int compat_nf_setsockopt(struct sock *sk, int pf, int optval,
		char __user *opt, int len);
int compat_nf_getsockopt(struct sock *sk, int pf, int optval,
		char __user *opt, int *len);

/* Call this before modifying an existing packet: ensures it is
   modifiable and linear to the point you care about (writable_len).
   Returns true or false. */
extern int skb_make_writable(struct sk_buff *skb, unsigned int writable_len);

struct flowi;
struct nf_queue_entry;

struct nf_afinfo {
	unsigned short	family;
	__sum16		(*checksum)(struct sk_buff *skb, unsigned int hook,
				    unsigned int dataoff, u_int8_t protocol);
	int		(*route)(struct dst_entry **dst, struct flowi *fl);
	void		(*saveroute)(const struct sk_buff *skb,
				     struct nf_queue_entry *entry);
	int		(*reroute)(struct sk_buff *skb,
				   const struct nf_queue_entry *entry);
	int		route_key_size;
};

extern const struct nf_afinfo *nf_afinfo[NPROTO];
static inline const struct nf_afinfo *nf_get_afinfo(unsigned short family)
{
	return rcu_dereference(nf_afinfo[family]);
}

static inline __sum16
nf_checksum(struct sk_buff *skb, unsigned int hook, unsigned int dataoff,
	    u_int8_t protocol, unsigned short family)
{
	const struct nf_afinfo *afinfo;
	__sum16 csum = 0;

	rcu_read_lock();
	afinfo = nf_get_afinfo(family);
	if (afinfo)
		csum = afinfo->checksum(skb, hook, dataoff, protocol);
	rcu_read_unlock();
	return csum;
}

extern int nf_register_afinfo(const struct nf_afinfo *afinfo);
extern void nf_unregister_afinfo(const struct nf_afinfo *afinfo);

#include <net/flow.h>
extern void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *);

static inline void
nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, int family)
{
#if defined(CONFIG_IP_NF_NAT_NEEDED) || defined(CONFIG_NF_NAT_NEEDED)
	void (*decodefn)(struct sk_buff *, struct flowi *);

	if (family == AF_INET && (decodefn = ip_nat_decode_session) != NULL)
		decodefn(skb, fl);
#endif
}

#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
extern struct proc_dir_entry *proc_net_netfilter;
#endif

#else /* !CONFIG_NETFILTER */
#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) (okfn)(skb)
#define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond) (okfn)(skb)
static inline int nf_hook_thresh(int pf, unsigned int hook,
				 struct sk_buff *skb,
				 struct net_device *indev,
				 struct net_device *outdev,
				 int (*okfn)(struct sk_buff *), int thresh,
				 int cond)
{
	return okfn(skb);
}
static inline int nf_hook(int pf, unsigned int hook, struct sk_buff *skb,
			  struct net_device *indev, struct net_device *outdev,
			  int (*okfn)(struct sk_buff *))
{
	return 1;
}
struct flowi;
static inline void
nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, int family) {}
#endif /*CONFIG_NETFILTER*/

#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
extern void (*ip_ct_attach)(struct sk_buff *, struct sk_buff *);
extern void nf_ct_attach(struct sk_buff *, struct sk_buff *);
extern void (*nf_ct_destroy)(struct nf_conntrack *);
#else
static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
#endif

#endif /*__KERNEL__*/
#endif /*__LINUX_NETFILTER_H*/
Commit	Line	Data
1da177e4 LT	1	#ifndef __LINUX_NETFILTER_H
	2	#define __LINUX_NETFILTER_H
	3
	4	#ifdef __KERNEL__
	5	#include <linux/init.h>
	6	#include <linux/types.h>
	7	#include <linux/skbuff.h>
	8	#include <linux/net.h>
	9	#include <linux/if.h>
	10	#include <linux/wait.h>
	11	#include <linux/list.h>
	12	#endif
	13	#include <linux/compiler.h>
	14
	15	/* Responses from hook functions. */
	16	#define NF_DROP 0
	17	#define NF_ACCEPT 1
	18	#define NF_STOLEN 2
	19	#define NF_QUEUE 3
	20	#define NF_REPEAT 4
	21	#define NF_STOP 5
	22	#define NF_MAX_VERDICT NF_STOP
	23
0ab43f84 HW	24	/* we overload the higher bits for encoding auxiliary data such as the queue
	25	* number. Not nice, but better than additional function arguments. */
	26	#define NF_VERDICT_MASK 0x0000ffff
	27	#define NF_VERDICT_BITS 16
	28
	29	#define NF_VERDICT_QMASK 0xffff0000
	30	#define NF_VERDICT_QBITS 16
	31
b766b305	32	#define NF_QUEUE_NR(x) (((x << NF_VERDICT_QBITS) & NF_VERDICT_QMASK) \| NF_QUEUE)
0ab43f84	33
6869c4d8 HW	34	/* only for userspace compatibility */
6869c4d8 HW	35	#ifndef __KERNEL__
1da177e4 LT	36	/* Generic cache responses from hook functions.
	37	<= 0x2000 is used for protocol-flags. */
	38	#define NFC_UNKNOWN 0x4000
	39	#define NFC_ALTERED 0x8000
6869c4d8	40	#endif
1da177e4	41
6e23ae2a PM	42	enum nf_inet_hooks {
	43	NF_INET_PRE_ROUTING,
	44	NF_INET_LOCAL_IN,
	45	NF_INET_FORWARD,
	46	NF_INET_LOCAL_OUT,
	47	NF_INET_POST_ROUTING,
	48	NF_INET_NUMHOOKS
	49	};
	50
1da177e4	51	#ifdef __KERNEL__
1da177e4 LT	52	#ifdef CONFIG_NETFILTER
	53
	54	extern void netfilter_init(void);
	55
	56	/* Largest hook number + 1 */
	57	#define NF_MAX_HOOKS 8
	58
	59	struct sk_buff;
	60	struct net_device;
	61
	62	typedef unsigned int nf_hookfn(unsigned int hooknum,
3db05fea	63	struct sk_buff *skb,
1da177e4 LT	64	const struct net_device *in,
	65	const struct net_device *out,
	66	int (okfn)(struct sk_buff ));
	67
	68	struct nf_hook_ops
	69	{
	70	struct list_head list;
	71
	72	/* User fills in from here down. */
	73	nf_hookfn *hook;
	74	struct module *owner;
	75	int pf;
	76	int hooknum;
	77	/* Hooks are ordered in ascending priority. */
	78	int priority;
	79	};
	80
	81	struct nf_sockopt_ops
	82	{
	83	struct list_head list;
	84
	85	int pf;
	86
	87	/* Non-inclusive ranges: use 0/0/NULL to never get called. */
	88	int set_optmin;
	89	int set_optmax;
	90	int (set)(struct sock sk, int optval, void __user *user, unsigned int len);
3fdadf7d DM	91	int (compat_set)(struct sock sk, int optval,
3fdadf7d DM	92	void __user *user, unsigned int len);
1da177e4 LT	93
	94	int get_optmin;
	95	int get_optmax;
	96	int (get)(struct sock sk, int optval, void __user user, int len);
3fdadf7d DM	97	int (compat_get)(struct sock sk, int optval,
3fdadf7d DM	98	void __user user, int len);
1da177e4	99
16fcec35 NH	100	/* Use the module struct to lock set/get code in place */
16fcec35 NH	101	struct module *owner;
1da177e4 LT	102	};
1da177e4 LT	103
1da177e4 LT	104	/* Function to register/unregister hook points. */
	105	int nf_register_hook(struct nf_hook_ops *reg);
	106	void nf_unregister_hook(struct nf_hook_ops *reg);
972d1cb1 PM	107	int nf_register_hooks(struct nf_hook_ops *reg, unsigned int n);
972d1cb1 PM	108	void nf_unregister_hooks(struct nf_hook_ops *reg, unsigned int n);
1da177e4 LT	109
	110	/* Functions to register get/setsockopt ranges (non-inclusive). You
	111	need to check permissions yourself! */
	112	int nf_register_sockopt(struct nf_sockopt_ops *reg);
	113	void nf_unregister_sockopt(struct nf_sockopt_ops *reg);
	114
d62f9ed4 PM	115	#ifdef CONFIG_SYSCTL
	116	/* Sysctl registration */
	117	struct ctl_table_header nf_register_sysctl_table(struct ctl_table path,
	118	struct ctl_table *table);
	119	void nf_unregister_sysctl_table(struct ctl_table_header *header,
	120	struct ctl_table *table);
	121	extern struct ctl_table nf_net_netfilter_sysctl_path[];
	122	extern struct ctl_table nf_net_ipv4_netfilter_sysctl_path[];
	123	#endif /* CONFIG_SYSCTL */
	124
1da177e4 LT	125	extern struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];
1da177e4 LT	126
3db05fea	127	int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb,
16a6677f PM	128	struct net_device indev, struct net_device outdev,
	129	int (okfn)(struct sk_buff ), int thresh);
	130
	131	/**
	132	* nf_hook_thresh - call a netfilter hook
	133	*
	134	* Returns 1 if the hook has allowed the packet to pass. The function
	135	* okfn must be invoked by the caller in this case. Any other return
	136	* value indicates the packet has been consumed by the hook.
	137	*/
	138	static inline int nf_hook_thresh(int pf, unsigned int hook,
3db05fea	139	struct sk_buff *skb,
16a6677f PM	140	struct net_device *indev,
16a6677f PM	141	struct net_device *outdev,
48d5cad8 PM	142	int (okfn)(struct sk_buff ), int thresh,
48d5cad8 PM	143	int cond)
16a6677f	144	{
48d5cad8 PM	145	if (!cond)
48d5cad8 PM	146	return 1;
16a6677f PM	147	#ifndef CONFIG_NETFILTER_DEBUG
	148	if (list_empty(&nf_hooks[pf][hook]))
	149	return 1;
	150	#endif
3db05fea	151	return nf_hook_slow(pf, hook, skb, indev, outdev, okfn, thresh);
16a6677f PM	152	}
16a6677f PM	153
3db05fea	154	static inline int nf_hook(int pf, unsigned int hook, struct sk_buff *skb,
16a6677f PM	155	struct net_device indev, struct net_device outdev,
	156	int (okfn)(struct sk_buff ))
	157	{
3db05fea	158	return nf_hook_thresh(pf, hook, skb, indev, outdev, okfn, INT_MIN, 1);
16a6677f	159	}
1da177e4 LT	160
	161	/* Activate hook; either okfn or kfree_skb called, unless a hook
	162	returns NF_STOLEN (in which case, it's up to the hook to deal with
	163	the consequences).
	164
	165	Returns -ERRNO if packet dropped. Zero means queued, stolen or
	166	accepted.
	167	*/
	168
	169	/* RR:
	170	> I don't want nf_hook to return anything because people might forget
	171	> about async and trust the return value to mean "packet was ok".
	172
	173	AK:
	174	Just document it clearly, then you can expect some sense from kernel
	175	coders :)
	176	*/
	177
	178	/* This is gross, but inline doesn't cut it for avoiding the function
	179	call in fast path: gcc doesn't inline (needs value tracking?). --RR */
16a6677f PM	180
	181	/* HX: It's slightly less gross now. */
	182
1da177e4 LT	183	#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \
1da177e4 LT	184	({int __ret; \
3db05fea	185	if ((__ret=nf_hook_thresh(pf, hook, (skb), indev, outdev, okfn, thresh, 1)) == 1)\
48d5cad8 PM	186	__ret = (okfn)(skb); \
	187	__ret;})
	188
	189	#define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond) \
	190	({int __ret; \
3db05fea	191	if ((__ret=nf_hook_thresh(pf, hook, (skb), indev, outdev, okfn, INT_MIN, cond)) == 1)\
1da177e4 LT	192	__ret = (okfn)(skb); \
1da177e4 LT	193	__ret;})
1da177e4	194
16a6677f PM	195	#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \
16a6677f PM	196	NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, INT_MIN)
1da177e4 LT	197
	198	/* Call setsockopt() */
	199	int nf_setsockopt(struct sock sk, int pf, int optval, char __user opt,
	200	int len);
	201	int nf_getsockopt(struct sock sk, int pf, int optval, char __user opt,
	202	int *len);
	203
3fdadf7d DM	204	int compat_nf_setsockopt(struct sock *sk, int pf, int optval,
	205	char __user *opt, int len);
	206	int compat_nf_getsockopt(struct sock *sk, int pf, int optval,
	207	char __user opt, int len);
	208
089af26c HW	209	/* Call this before modifying an existing packet: ensures it is
	210	modifiable and linear to the point you care about (writable_len).
	211	Returns true or false. */
37d41879	212	extern int skb_make_writable(struct sk_buff *skb, unsigned int writable_len);
089af26c	213
1841a4c7	214	struct flowi;
02f014d8	215	struct nf_queue_entry;
c01cd429	216
bce8032e PM	217	struct nf_afinfo {
bce8032e PM	218	unsigned short family;
b51655b9	219	__sum16 (checksum)(struct sk_buff skb, unsigned int hook,
422c346f	220	unsigned int dataoff, u_int8_t protocol);
1841a4c7	221	int (route)(struct dst_entry dst, struct flowi fl);
bce8032e	222	void (saveroute)(const struct sk_buff skb,
02f014d8	223	struct nf_queue_entry *entry);
3db05fea	224	int (reroute)(struct sk_buff skb,
02f014d8	225	const struct nf_queue_entry *entry);
bce8032e	226	int route_key_size;
2cc7d573 HW	227	};
2cc7d573 HW	228
1e796fda PM	229	extern const struct nf_afinfo *nf_afinfo[NPROTO];
1e796fda PM	230	static inline const struct nf_afinfo *nf_get_afinfo(unsigned short family)
bce8032e PM	231	{
	232	return rcu_dereference(nf_afinfo[family]);
	233	}
2cc7d573	234
b51655b9	235	static inline __sum16
422c346f PM	236	nf_checksum(struct sk_buff *skb, unsigned int hook, unsigned int dataoff,
	237	u_int8_t protocol, unsigned short family)
	238	{
1e796fda	239	const struct nf_afinfo *afinfo;
b51655b9	240	__sum16 csum = 0;
422c346f PM	241
	242	rcu_read_lock();
	243	afinfo = nf_get_afinfo(family);
	244	if (afinfo)
	245	csum = afinfo->checksum(skb, hook, dataoff, protocol);
	246	rcu_read_unlock();
	247	return csum;
	248	}
	249
1e796fda PM	250	extern int nf_register_afinfo(const struct nf_afinfo *afinfo);
1e796fda PM	251	extern void nf_unregister_afinfo(const struct nf_afinfo *afinfo);
bce8032e	252
eb9c7ebe PM	253	#include <net/flow.h>
	254	extern void (ip_nat_decode_session)(struct sk_buff , struct flowi *);
	255
	256	static inline void
	257	nf_nat_decode_session(struct sk_buff skb, struct flowi fl, int family)
	258	{
5b1158e9	259	#if defined(CONFIG_IP_NF_NAT_NEEDED) \|\| defined(CONFIG_NF_NAT_NEEDED)
eb9c7ebe PM	260	void (decodefn)(struct sk_buff , struct flowi *);
	261
	262	if (family == AF_INET && (decodefn = ip_nat_decode_session) != NULL)
	263	decodefn(skb, fl);
	264	#endif
	265	}
	266
608c8e4f HW	267	#ifdef CONFIG_PROC_FS
	268	#include <linux/proc_fs.h>
	269	extern struct proc_dir_entry *proc_net_netfilter;
	270	#endif
	271
1da177e4 LT	272	#else /* !CONFIG_NETFILTER */
1da177e4 LT	273	#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) (okfn)(skb)
48d5cad8	274	#define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond) (okfn)(skb)
f53b61d8	275	static inline int nf_hook_thresh(int pf, unsigned int hook,
3db05fea	276	struct sk_buff *skb,
f53b61d8 DM	277	struct net_device *indev,
f53b61d8 DM	278	struct net_device *outdev,
48d5cad8 PM	279	int (okfn)(struct sk_buff ), int thresh,
48d5cad8 PM	280	int cond)
f53b61d8	281	{
3db05fea	282	return okfn(skb);
f53b61d8	283	}
3db05fea	284	static inline int nf_hook(int pf, unsigned int hook, struct sk_buff *skb,
f53b61d8 DM	285	struct net_device indev, struct net_device outdev,
	286	int (okfn)(struct sk_buff ))
	287	{
9c92d348	288	return 1;
f53b61d8	289	}
f53b61d8	290	struct flowi;
eb9c7ebe PM	291	static inline void
eb9c7ebe PM	292	nf_nat_decode_session(struct sk_buff skb, struct flowi fl, int family) {}
1da177e4 LT	293	#endif /CONFIG_NETFILTER/
1da177e4 LT	294
5f79e0f9 YK	295	#if defined(CONFIG_NF_CONNTRACK) \|\| defined(CONFIG_NF_CONNTRACK_MODULE)
	296	extern void (ip_ct_attach)(struct sk_buff , struct sk_buff *);
	297	extern void nf_ct_attach(struct sk_buff , struct sk_buff );
de6e05c4	298	extern void (nf_ct_destroy)(struct nf_conntrack );
5f79e0f9 YK	299	#else
	300	static inline void nf_ct_attach(struct sk_buff new, struct sk_buff skb) {}
	301	#endif
	302
1da177e4 LT	303	#endif /__KERNEL__/
1da177e4 LT	304	#endif /__LINUX_NETFILTER_H/