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

#ifndef _X_TABLES_H
#define _X_TABLES_H

#define XT_FUNCTION_MAXNAMELEN 30
#define XT_TABLE_MAXNAMELEN 32

struct xt_entry_match
{
	union {
		struct {
			u_int16_t match_size;

			/* Used by userspace */
			char name[XT_FUNCTION_MAXNAMELEN-1];

			u_int8_t revision;
		} user;
		struct {
			u_int16_t match_size;

			/* Used inside the kernel */
			struct xt_match *match;
		} kernel;

		/* Total length */
		u_int16_t match_size;
	} u;

	unsigned char data[0];
};

struct xt_entry_target
{
	union {
		struct {
			u_int16_t target_size;

			/* Used by userspace */
			char name[XT_FUNCTION_MAXNAMELEN-1];

			u_int8_t revision;
		} user;
		struct {
			u_int16_t target_size;

			/* Used inside the kernel */
			struct xt_target *target;
		} kernel;

		/* Total length */
		u_int16_t target_size;
	} u;

	unsigned char data[0];
};

#define XT_TARGET_INIT(__name, __size)					       \
{									       \
	.target.u.user = {						       \
		.target_size	= XT_ALIGN(__size),			       \
		.name		= __name,				       \
	},								       \
}

struct xt_standard_target
{
	struct xt_entry_target target;
	int verdict;
};

/* The argument to IPT_SO_GET_REVISION_*.  Returns highest revision
 * kernel supports, if >= revision. */
struct xt_get_revision
{
	char name[XT_FUNCTION_MAXNAMELEN-1];

	u_int8_t revision;
};

/* CONTINUE verdict for targets */
#define XT_CONTINUE 0xFFFFFFFF

/* For standard target */
#define XT_RETURN (-NF_REPEAT - 1)

/* this is a dummy structure to find out the alignment requirement for a struct
 * containing all the fundamental data types that are used in ipt_entry,
 * ip6t_entry and arpt_entry.  This sucks, and it is a hack.  It will be my
 * personal pleasure to remove it -HW
 */
struct _xt_align
{
	u_int8_t u8;
	u_int16_t u16;
	u_int32_t u32;
	u_int64_t u64;
};

#define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) 	\
			& ~(__alignof__(struct _xt_align)-1))

/* Standard return verdict, or do jump. */
#define XT_STANDARD_TARGET ""
/* Error verdict. */
#define XT_ERROR_TARGET "ERROR"

#define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
#define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)

struct xt_counters
{
	u_int64_t pcnt, bcnt;			/* Packet and byte counters */
};

/* The argument to IPT_SO_ADD_COUNTERS. */
struct xt_counters_info
{
	/* Which table. */
	char name[XT_TABLE_MAXNAMELEN];

	unsigned int num_counters;

	/* The counters (actually `number' of these). */
	struct xt_counters counters[0];
};

#define XT_INV_PROTO		0x40	/* Invert the sense of PROTO. */

/* fn returns 0 to continue iteration */
#define XT_MATCH_ITERATE(type, e, fn, args...)			\
({								\
	unsigned int __i;					\
	int __ret = 0;						\
	struct xt_entry_match *__m;				\
								\
	for (__i = sizeof(type);				\
	     __i < (e)->target_offset;				\
	     __i += __m->u.match_size) {			\
		__m = (void *)e + __i;				\
								\
		__ret = fn(__m , ## args);			\
		if (__ret != 0)					\
			break;					\
	}							\
	__ret;							\
})

/* fn returns 0 to continue iteration */
#define XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \
({								\
	unsigned int __i, __n;					\
	int __ret = 0;						\
	type *__entry;						\
								\
	for (__i = 0, __n = 0; __i < (size);			\
	     __i += __entry->next_offset, __n++) { 		\
		__entry = (void *)(entries) + __i;		\
		if (__n < n)					\
			continue;				\
								\
		__ret = fn(__entry , ## args);			\
		if (__ret != 0)					\
			break;					\
	}							\
	__ret;							\
})

/* fn returns 0 to continue iteration */
#define XT_ENTRY_ITERATE(type, entries, size, fn, args...) \
	XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args)

#ifdef __KERNEL__

#include <linux/netdevice.h>

/**
 * struct xt_match_param - parameters for match extensions' match functions
 *
 * @in:		input netdevice
 * @out:	output netdevice
 * @match:	struct xt_match through which this function was invoked
 * @matchinfo:	per-match data
 * @fragoff:	packet is a fragment, this is the data offset
 * @thoff:	position of transport header relative to skb->data
 * @hotdrop:	drop packet if we had inspection problems
 */
struct xt_match_param {
	const struct net_device *in, *out;
	const struct xt_match *match;
	const void *matchinfo;
	int fragoff;
	unsigned int thoff;
	bool *hotdrop;
};

/**
 * struct xt_mtchk_param - parameters for match extensions'
 * checkentry functions
 *
 * @table:	table the rule is tried to be inserted into
 * @entryinfo:	the family-specific rule data
 * 		(struct ipt_ip, ip6t_ip, ebt_entry)
 * @match:	struct xt_match through which this function was invoked
 * @matchinfo:	per-match data
 * @hook_mask:	via which hooks the new rule is reachable
 */
struct xt_mtchk_param {
	const char *table;
	const void *entryinfo;
	const struct xt_match *match;
	void *matchinfo;
	unsigned int hook_mask;
};

/* Match destructor parameters */
struct xt_mtdtor_param {
	const struct xt_match *match;
	void *matchinfo;
};

/**
 * struct xt_target_param - parameters for target extensions' target functions
 *
 * @hooknum:	hook through which this target was invoked
 * @target:	struct xt_target through which this function was invoked
 * @targinfo:	per-target data
 *
 * Other fields see above.
 */
struct xt_target_param {
	const struct net_device *in, *out;
	unsigned int hooknum;
	const struct xt_target *target;
	const void *targinfo;
};

struct xt_match
{
	struct list_head list;

	const char name[XT_FUNCTION_MAXNAMELEN-1];

	/* Return true or false: return FALSE and set *hotdrop = 1 to
           force immediate packet drop. */
	/* Arguments changed since 2.6.9, as this must now handle
	   non-linear skb, using skb_header_pointer and
	   skb_ip_make_writable. */
	bool (*match)(const struct sk_buff *skb,
		      const struct xt_match_param *);

	/* Called when user tries to insert an entry of this type. */
	bool (*checkentry)(const struct xt_mtchk_param *);

	/* Called when entry of this type deleted. */
	void (*destroy)(const struct xt_mtdtor_param *);

	/* Called when userspace align differs from kernel space one */
	void (*compat_from_user)(void *dst, void *src);
	int (*compat_to_user)(void __user *dst, void *src);

	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
	struct module *me;

	/* Free to use by each match */
	unsigned long data;

	const char *table;
	unsigned int matchsize;
	unsigned int compatsize;
	unsigned int hooks;
	unsigned short proto;

	unsigned short family;
	u_int8_t revision;
};

/* Registration hooks for targets. */
struct xt_target
{
	struct list_head list;

	const char name[XT_FUNCTION_MAXNAMELEN-1];

	/* Returns verdict. Argument order changed since 2.6.9, as this
	   must now handle non-linear skbs, using skb_copy_bits and
	   skb_ip_make_writable. */
	unsigned int (*target)(struct sk_buff *skb,
			       const struct xt_target_param *);

	/* Called when user tries to insert an entry of this type:
           hook_mask is a bitmask of hooks from which it can be
           called. */
	/* Should return true or false. */
	bool (*checkentry)(const char *tablename,
			   const void *entry,
			   const struct xt_target *target,
			   void *targinfo,
			   unsigned int hook_mask);

	/* Called when entry of this type deleted. */
	void (*destroy)(const struct xt_target *target, void *targinfo);

	/* Called when userspace align differs from kernel space one */
	void (*compat_from_user)(void *dst, void *src);
	int (*compat_to_user)(void __user *dst, void *src);

	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
	struct module *me;

	const char *table;
	unsigned int targetsize;
	unsigned int compatsize;
	unsigned int hooks;
	unsigned short proto;

	unsigned short family;
	u_int8_t revision;
};

/* Furniture shopping... */
struct xt_table
{
	struct list_head list;

	/* A unique name... */
	const char name[XT_TABLE_MAXNAMELEN];

	/* What hooks you will enter on */
	unsigned int valid_hooks;

	/* Lock for the curtain */
	rwlock_t lock;

	/* Man behind the curtain... */
	//struct ip6t_table_info *private;
	void *private;

	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
	struct module *me;

	u_int8_t af;		/* address/protocol family */
};

#include <linux/netfilter_ipv4.h>

/* The table itself */
struct xt_table_info
{
	/* Size per table */
	unsigned int size;
	/* Number of entries: FIXME. --RR */
	unsigned int number;
	/* Initial number of entries. Needed for module usage count */
	unsigned int initial_entries;

	/* Entry points and underflows */
	unsigned int hook_entry[NF_INET_NUMHOOKS];
	unsigned int underflow[NF_INET_NUMHOOKS];

	/* ipt_entry tables: one per CPU */
	/* Note : this field MUST be the last one, see XT_TABLE_INFO_SZ */
	char *entries[1];
};

#define XT_TABLE_INFO_SZ (offsetof(struct xt_table_info, entries) \
			  + nr_cpu_ids * sizeof(char *))
extern int xt_register_target(struct xt_target *target);
extern void xt_unregister_target(struct xt_target *target);
extern int xt_register_targets(struct xt_target *target, unsigned int n);
extern void xt_unregister_targets(struct xt_target *target, unsigned int n);

extern int xt_register_match(struct xt_match *target);
extern void xt_unregister_match(struct xt_match *target);
extern int xt_register_matches(struct xt_match *match, unsigned int n);
extern void xt_unregister_matches(struct xt_match *match, unsigned int n);

extern int xt_check_match(struct xt_mtchk_param *, u_int8_t family,
			  unsigned int size, u_int8_t proto, bool inv_proto);
extern int xt_check_target(const struct xt_target *target, unsigned short family,
			   unsigned int size, const char *table, unsigned int hook,
			   unsigned short proto, int inv_proto,
			   const void *entry, void *targinfo);

extern struct xt_table *xt_register_table(struct net *net,
					  struct xt_table *table,
					  struct xt_table_info *bootstrap,
					  struct xt_table_info *newinfo);
extern void *xt_unregister_table(struct xt_table *table);

extern struct xt_table_info *xt_replace_table(struct xt_table *table,
					      unsigned int num_counters,
					      struct xt_table_info *newinfo,
					      int *error);

extern struct xt_match *xt_find_match(u8 af, const char *name, u8 revision);
extern struct xt_target *xt_find_target(u8 af, const char *name, u8 revision);
extern struct xt_target *xt_request_find_target(u8 af, const char *name,
						u8 revision);
extern int xt_find_revision(u8 af, const char *name, u8 revision,
			    int target, int *err);

extern struct xt_table *xt_find_table_lock(struct net *net, u_int8_t af,
					   const char *name);
extern void xt_table_unlock(struct xt_table *t);

extern int xt_proto_init(struct net *net, u_int8_t af);
extern void xt_proto_fini(struct net *net, u_int8_t af);

extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
extern void xt_free_table_info(struct xt_table_info *info);

#ifdef CONFIG_COMPAT
#include <net/compat.h>

struct compat_xt_entry_match
{
	union {
		struct {
			u_int16_t match_size;
			char name[XT_FUNCTION_MAXNAMELEN - 1];
			u_int8_t revision;
		} user;
		struct {
			u_int16_t match_size;
			compat_uptr_t match;
		} kernel;
		u_int16_t match_size;
	} u;
	unsigned char data[0];
};

struct compat_xt_entry_target
{
	union {
		struct {
			u_int16_t target_size;
			char name[XT_FUNCTION_MAXNAMELEN - 1];
			u_int8_t revision;
		} user;
		struct {
			u_int16_t target_size;
			compat_uptr_t target;
		} kernel;
		u_int16_t target_size;
	} u;
	unsigned char data[0];
};

/* FIXME: this works only on 32 bit tasks
 * need to change whole approach in order to calculate align as function of
 * current task alignment */

struct compat_xt_counters
{
#if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
	u_int32_t cnt[4];
#else
	u_int64_t cnt[2];
#endif
};

struct compat_xt_counters_info
{
	char name[XT_TABLE_MAXNAMELEN];
	compat_uint_t num_counters;
	struct compat_xt_counters counters[0];
};

#define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
		& ~(__alignof__(struct compat_xt_counters)-1))

extern void xt_compat_lock(u_int8_t af);
extern void xt_compat_unlock(u_int8_t af);

extern int xt_compat_add_offset(u_int8_t af, unsigned int offset, short delta);
extern void xt_compat_flush_offsets(u_int8_t af);
extern short xt_compat_calc_jump(u_int8_t af, unsigned int offset);

extern int xt_compat_match_offset(const struct xt_match *match);
extern int xt_compat_match_from_user(struct xt_entry_match *m,
				     void **dstptr, unsigned int *size);
extern int xt_compat_match_to_user(struct xt_entry_match *m,
				   void __user **dstptr, unsigned int *size);

extern int xt_compat_target_offset(const struct xt_target *target);
extern void xt_compat_target_from_user(struct xt_entry_target *t,
				       void **dstptr, unsigned int *size);
extern int xt_compat_target_to_user(struct xt_entry_target *t,
				    void __user **dstptr, unsigned int *size);

#endif /* CONFIG_COMPAT */
#endif /* __KERNEL__ */

#endif /* _X_TABLES_H */
Commit	Line	Data
2e4e6a17 HW	1	#ifndef _X_TABLES_H
	2	#define _X_TABLES_H
	3
	4	#define XT_FUNCTION_MAXNAMELEN 30
	5	#define XT_TABLE_MAXNAMELEN 32
	6
1e30a014 DM	7	struct xt_entry_match
	8	{
	9	union {
	10	struct {
	11	u_int16_t match_size;
	12
	13	/* Used by userspace */
	14	char name[XT_FUNCTION_MAXNAMELEN-1];
	15
	16	u_int8_t revision;
	17	} user;
	18	struct {
	19	u_int16_t match_size;
	20
	21	/* Used inside the kernel */
	22	struct xt_match *match;
	23	} kernel;
	24
	25	/* Total length */
	26	u_int16_t match_size;
	27	} u;
	28
	29	unsigned char data[0];
	30	};
	31
	32	struct xt_entry_target
	33	{
	34	union {
	35	struct {
	36	u_int16_t target_size;
	37
	38	/* Used by userspace */
	39	char name[XT_FUNCTION_MAXNAMELEN-1];
	40
	41	u_int8_t revision;
	42	} user;
	43	struct {
	44	u_int16_t target_size;
	45
	46	/* Used inside the kernel */
	47	struct xt_target *target;
	48	} kernel;
	49
	50	/* Total length */
	51	u_int16_t target_size;
	52	} u;
	53
	54	unsigned char data[0];
	55	};
	56
3c2ad469 PM	57	#define XT_TARGET_INIT(__name, __size) \
	58	{ \
	59	.target.u.user = { \
	60	.target_size = XT_ALIGN(__size), \
	61	.name = __name, \
	62	}, \
	63	}
	64
1e30a014 DM	65	struct xt_standard_target
	66	{
	67	struct xt_entry_target target;
	68	int verdict;
	69	};
	70
2e4e6a17 HW	71	/* The argument to IPT_SO_GET_REVISION_*. Returns highest revision
	72	* kernel supports, if >= revision. */
	73	struct xt_get_revision
	74	{
	75	char name[XT_FUNCTION_MAXNAMELEN-1];
	76
	77	u_int8_t revision;
	78	};
	79
	80	/* CONTINUE verdict for targets */
	81	#define XT_CONTINUE 0xFFFFFFFF
	82
	83	/* For standard target */
	84	#define XT_RETURN (-NF_REPEAT - 1)
	85
6fbfc968 DM	86	/* this is a dummy structure to find out the alignment requirement for a struct
	87	* containing all the fundamental data types that are used in ipt_entry,
	88	* ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my
	89	* personal pleasure to remove it -HW
	90	*/
	91	struct _xt_align
	92	{
	93	u_int8_t u8;
	94	u_int16_t u16;
	95	u_int32_t u32;
	96	u_int64_t u64;
	97	};
	98
	99	#define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) \
	100	& ~(__alignof__(struct _xt_align)-1))
2e4e6a17 HW	101
	102	/* Standard return verdict, or do jump. */
	103	#define XT_STANDARD_TARGET ""
	104	/* Error verdict. */
	105	#define XT_ERROR_TARGET "ERROR"
	106
2e4e6a17 HW	107	#define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
	108	#define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
	109
	110	struct xt_counters
	111	{
	112	u_int64_t pcnt, bcnt; /* Packet and byte counters */
	113	};
	114
	115	/* The argument to IPT_SO_ADD_COUNTERS. */
	116	struct xt_counters_info
	117	{
	118	/* Which table. */
	119	char name[XT_TABLE_MAXNAMELEN];
	120
	121	unsigned int num_counters;
	122
	123	/* The counters (actually `number' of these). */
	124	struct xt_counters counters[0];
	125	};
	126
	127	#define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */
	128
89c002d6 PM	129	/* fn returns 0 to continue iteration */
	130	#define XT_MATCH_ITERATE(type, e, fn, args...) \
	131	({ \
	132	unsigned int __i; \
	133	int __ret = 0; \
	134	struct xt_entry_match *__m; \
	135	\
	136	for (__i = sizeof(type); \
	137	__i < (e)->target_offset; \
	138	__i += __m->u.match_size) { \
	139	__m = (void *)e + __i; \
	140	\
	141	__ret = fn(__m , ## args); \
	142	if (__ret != 0) \
	143	break; \
	144	} \
	145	__ret; \
	146	})
	147
	148	/* fn returns 0 to continue iteration */
	149	#define XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \
	150	({ \
	151	unsigned int __i, __n; \
	152	int __ret = 0; \
	153	type *__entry; \
	154	\
	155	for (__i = 0, __n = 0; __i < (size); \
	156	__i += __entry->next_offset, __n++) { \
	157	__entry = (void *)(entries) + __i; \
	158	if (__n < n) \
	159	continue; \
	160	\
	161	__ret = fn(__entry , ## args); \
	162	if (__ret != 0) \
	163	break; \
	164	} \
	165	__ret; \
	166	})
	167
	168	/* fn returns 0 to continue iteration */
	169	#define XT_ENTRY_ITERATE(type, entries, size, fn, args...) \
	170	XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args)
	171
2e4e6a17 HW	172	#ifdef __KERNEL__
	173
	174	#include <linux/netdevice.h>
	175
f7108a20 JE	176	/**
	177	* struct xt_match_param - parameters for match extensions' match functions
	178	*
	179	* @in: input netdevice
	180	* @out: output netdevice
	181	* @match: struct xt_match through which this function was invoked
	182	* @matchinfo: per-match data
	183	* @fragoff: packet is a fragment, this is the data offset
	184	* @thoff: position of transport header relative to skb->data
	185	* @hotdrop: drop packet if we had inspection problems
	186	*/
	187	struct xt_match_param {
	188	const struct net_device in, out;
	189	const struct xt_match *match;
	190	const void *matchinfo;
	191	int fragoff;
	192	unsigned int thoff;
	193	bool *hotdrop;
	194	};
	195
9b4fce7a JE	196	/**
	197	* struct xt_mtchk_param - parameters for match extensions'
	198	* checkentry functions
	199	*
	200	* @table: table the rule is tried to be inserted into
	201	* @entryinfo: the family-specific rule data
	202	* (struct ipt_ip, ip6t_ip, ebt_entry)
	203	* @match: struct xt_match through which this function was invoked
	204	* @matchinfo: per-match data
	205	* @hook_mask: via which hooks the new rule is reachable
	206	*/
	207	struct xt_mtchk_param {
	208	const char *table;
	209	const void *entryinfo;
	210	const struct xt_match *match;
	211	void *matchinfo;
	212	unsigned int hook_mask;
	213	};
	214
6be3d859 JE	215	/* Match destructor parameters */
	216	struct xt_mtdtor_param {
	217	const struct xt_match *match;
	218	void *matchinfo;
	219	};
	220
7eb35586 JE	221	/**
	222	* struct xt_target_param - parameters for target extensions' target functions
	223	*
	224	* @hooknum: hook through which this target was invoked
	225	* @target: struct xt_target through which this function was invoked
	226	* @targinfo: per-target data
	227	*
	228	* Other fields see above.
	229	*/
	230	struct xt_target_param {
	231	const struct net_device in, out;
	232	unsigned int hooknum;
	233	const struct xt_target *target;
	234	const void *targinfo;
	235	};
	236
2e4e6a17 HW	237	struct xt_match
	238	{
	239	struct list_head list;
	240
	241	const char name[XT_FUNCTION_MAXNAMELEN-1];
	242
2e4e6a17 HW	243	/* Return true or false: return FALSE and set *hotdrop = 1 to
	244	force immediate packet drop. */
	245	/* Arguments changed since 2.6.9, as this must now handle
	246	non-linear skb, using skb_header_pointer and
	247	skb_ip_make_writable. */
1d93a9cb	248	bool (match)(const struct sk_buff skb,
f7108a20	249	const struct xt_match_param *);
2e4e6a17 HW	250
2e4e6a17 HW	251	/* Called when user tries to insert an entry of this type. */
9b4fce7a	252	bool (checkentry)(const struct xt_mtchk_param );
2e4e6a17 HW	253
2e4e6a17 HW	254	/* Called when entry of this type deleted. */
6be3d859	255	void (destroy)(const struct xt_mtdtor_param );
2e4e6a17	256
2722971c	257	/* Called when userspace align differs from kernel space one */
9fa492cd PM	258	void (compat_from_user)(void dst, void *src);
9fa492cd PM	259	int (compat_to_user)(void __user dst, void *src);
2722971c	260
2e4e6a17 HW	261	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
2e4e6a17 HW	262	struct module *me;
37f9f733	263
91270cf8 PM	264	/* Free to use by each match */
	265	unsigned long data;
	266
ecb6f85e	267	const char *table;
37f9f733	268	unsigned int matchsize;
9fa492cd	269	unsigned int compatsize;
37f9f733 PM	270	unsigned int hooks;
37f9f733 PM	271	unsigned short proto;
c4b88513 PM	272
c4b88513 PM	273	unsigned short family;
37f9f733	274	u_int8_t revision;
2e4e6a17 HW	275	};
	276
	277	/* Registration hooks for targets. */
	278	struct xt_target
	279	{
	280	struct list_head list;
	281
	282	const char name[XT_FUNCTION_MAXNAMELEN-1];
	283
2e4e6a17 HW	284	/* Returns verdict. Argument order changed since 2.6.9, as this
	285	must now handle non-linear skbs, using skb_copy_bits and
	286	skb_ip_make_writable. */
3db05fea	287	unsigned int (target)(struct sk_buff skb,
7eb35586	288	const struct xt_target_param *);
2e4e6a17 HW	289
	290	/* Called when user tries to insert an entry of this type:
	291	hook_mask is a bitmask of hooks from which it can be
	292	called. */
	293	/* Should return true or false. */
e1931b78 JE	294	bool (checkentry)(const char tablename,
	295	const void *entry,
	296	const struct xt_target *target,
	297	void *targinfo,
	298	unsigned int hook_mask);
2e4e6a17 HW	299
2e4e6a17 HW	300	/* Called when entry of this type deleted. */
efa74165	301	void (destroy)(const struct xt_target target, void *targinfo);
2e4e6a17	302
2722971c	303	/* Called when userspace align differs from kernel space one */
9fa492cd PM	304	void (compat_from_user)(void dst, void *src);
9fa492cd PM	305	int (compat_to_user)(void __user dst, void *src);
2722971c	306
2e4e6a17 HW	307	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
2e4e6a17 HW	308	struct module *me;
37f9f733	309
ecb6f85e	310	const char *table;
37f9f733	311	unsigned int targetsize;
9fa492cd	312	unsigned int compatsize;
37f9f733 PM	313	unsigned int hooks;
37f9f733 PM	314	unsigned short proto;
c4b88513 PM	315
c4b88513 PM	316	unsigned short family;
37f9f733	317	u_int8_t revision;
2e4e6a17 HW	318	};
	319
	320	/* Furniture shopping... */
	321	struct xt_table
	322	{
	323	struct list_head list;
	324
	325	/* A unique name... */
ecb6f85e	326	const char name[XT_TABLE_MAXNAMELEN];
2e4e6a17 HW	327
	328	/* What hooks you will enter on */
	329	unsigned int valid_hooks;
	330
	331	/* Lock for the curtain */
	332	rwlock_t lock;
	333
	334	/* Man behind the curtain... */
	335	//struct ip6t_table_info *private;
	336	void *private;
	337
	338	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
	339	struct module *me;
	340
76108cea	341	u_int8_t af; /* address/protocol family */
2e4e6a17 HW	342	};
	343
	344	#include <linux/netfilter_ipv4.h>
	345
	346	/* The table itself */
	347	struct xt_table_info
	348	{
	349	/* Size per table */
	350	unsigned int size;
	351	/* Number of entries: FIXME. --RR */
	352	unsigned int number;
	353	/* Initial number of entries. Needed for module usage count */
	354	unsigned int initial_entries;
	355
	356	/* Entry points and underflows */
6e23ae2a PM	357	unsigned int hook_entry[NF_INET_NUMHOOKS];
6e23ae2a PM	358	unsigned int underflow[NF_INET_NUMHOOKS];
2e4e6a17 HW	359
2e4e6a17 HW	360	/* ipt_entry tables: one per CPU */
259d4e41 ED	361	/* Note : this field MUST be the last one, see XT_TABLE_INFO_SZ */
259d4e41 ED	362	char *entries[1];
2e4e6a17 HW	363	};
2e4e6a17 HW	364
259d4e41 ED	365	#define XT_TABLE_INFO_SZ (offsetof(struct xt_table_info, entries) \
259d4e41 ED	366	+ nr_cpu_ids * sizeof(char *))
a45049c5 PNA	367	extern int xt_register_target(struct xt_target *target);
a45049c5 PNA	368	extern void xt_unregister_target(struct xt_target *target);
52d9c42e PM	369	extern int xt_register_targets(struct xt_target *target, unsigned int n);
	370	extern void xt_unregister_targets(struct xt_target *target, unsigned int n);
	371
a45049c5 PNA	372	extern int xt_register_match(struct xt_match *target);
a45049c5 PNA	373	extern void xt_unregister_match(struct xt_match *target);
52d9c42e PM	374	extern int xt_register_matches(struct xt_match *match, unsigned int n);
52d9c42e PM	375	extern void xt_unregister_matches(struct xt_match *match, unsigned int n);
2e4e6a17	376
9b4fce7a JE	377	extern int xt_check_match(struct xt_mtchk_param *, u_int8_t family,
9b4fce7a JE	378	unsigned int size, u_int8_t proto, bool inv_proto);
37f9f733 PM	379	extern int xt_check_target(const struct xt_target *target, unsigned short family,
37f9f733 PM	380	unsigned int size, const char *table, unsigned int hook,
367c6790 JE	381	unsigned short proto, int inv_proto,
367c6790 JE	382	const void entry, void targinfo);
37f9f733	383
8d870052 AD	384	extern struct xt_table xt_register_table(struct net net,
8d870052 AD	385	struct xt_table *table,
a98da11d AD	386	struct xt_table_info *bootstrap,
a98da11d AD	387	struct xt_table_info *newinfo);
2e4e6a17 HW	388	extern void xt_unregister_table(struct xt_table table);
	389
	390	extern struct xt_table_info xt_replace_table(struct xt_table table,
	391	unsigned int num_counters,
	392	struct xt_table_info *newinfo,
	393	int *error);
	394
76108cea JE	395	extern struct xt_match xt_find_match(u8 af, const char name, u8 revision);
	396	extern struct xt_target xt_find_target(u8 af, const char name, u8 revision);
	397	extern struct xt_target xt_request_find_target(u8 af, const char name,
2e4e6a17	398	u8 revision);
76108cea JE	399	extern int xt_find_revision(u8 af, const char *name, u8 revision,
76108cea JE	400	int target, int *err);
2e4e6a17	401
76108cea	402	extern struct xt_table xt_find_table_lock(struct net net, u_int8_t af,
8d870052	403	const char *name);
2e4e6a17 HW	404	extern void xt_table_unlock(struct xt_table *t);
2e4e6a17 HW	405
76108cea JE	406	extern int xt_proto_init(struct net *net, u_int8_t af);
76108cea JE	407	extern void xt_proto_fini(struct net *net, u_int8_t af);
2e4e6a17 HW	408
	409	extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
	410	extern void xt_free_table_info(struct xt_table_info *info);
	411
2722971c DM	412	#ifdef CONFIG_COMPAT
	413	#include <net/compat.h>
	414
	415	struct compat_xt_entry_match
	416	{
	417	union {
	418	struct {
	419	u_int16_t match_size;
	420	char name[XT_FUNCTION_MAXNAMELEN - 1];
	421	u_int8_t revision;
	422	} user;
46c5ea3c PM	423	struct {
	424	u_int16_t match_size;
	425	compat_uptr_t match;
	426	} kernel;
2722971c DM	427	u_int16_t match_size;
	428	} u;
	429	unsigned char data[0];
	430	};
	431
	432	struct compat_xt_entry_target
	433	{
	434	union {
	435	struct {
	436	u_int16_t target_size;
	437	char name[XT_FUNCTION_MAXNAMELEN - 1];
	438	u_int8_t revision;
	439	} user;
46c5ea3c PM	440	struct {
	441	u_int16_t target_size;
	442	compat_uptr_t target;
	443	} kernel;
2722971c DM	444	u_int16_t target_size;
	445	} u;
	446	unsigned char data[0];
	447	};
	448
	449	/* FIXME: this works only on 32 bit tasks
	450	* need to change whole approach in order to calculate align as function of
	451	* current task alignment */
	452
	453	struct compat_xt_counters
	454	{
55fe5866	455	#if defined(CONFIG_X86_64) \|\| defined(CONFIG_IA64)
2722971c	456	u_int32_t cnt[4];
55fe5866 PM	457	#else
	458	u_int64_t cnt[2];
	459	#endif
2722971c DM	460	};
	461
	462	struct compat_xt_counters_info
	463	{
	464	char name[XT_TABLE_MAXNAMELEN];
	465	compat_uint_t num_counters;
	466	struct compat_xt_counters counters[0];
	467	};
	468
	469	#define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
	470	& ~(__alignof__(struct compat_xt_counters)-1))
	471
76108cea JE	472	extern void xt_compat_lock(u_int8_t af);
76108cea JE	473	extern void xt_compat_unlock(u_int8_t af);
9fa492cd	474
76108cea JE	475	extern int xt_compat_add_offset(u_int8_t af, unsigned int offset, short delta);
	476	extern void xt_compat_flush_offsets(u_int8_t af);
	477	extern short xt_compat_calc_jump(u_int8_t af, unsigned int offset);
b386d9f5	478
5452e425	479	extern int xt_compat_match_offset(const struct xt_match *match);
89566951	480	extern int xt_compat_match_from_user(struct xt_entry_match *m,
b0a6363c	481	void *dstptr, unsigned int size);
9fa492cd	482	extern int xt_compat_match_to_user(struct xt_entry_match *m,
b0a6363c	483	void __user *dstptr, unsigned int size);
9fa492cd	484
5452e425	485	extern int xt_compat_target_offset(const struct xt_target *target);
9fa492cd	486	extern void xt_compat_target_from_user(struct xt_entry_target *t,
b0a6363c	487	void *dstptr, unsigned int size);
9fa492cd	488	extern int xt_compat_target_to_user(struct xt_entry_target *t,
b0a6363c	489	void __user *dstptr, unsigned int size);
2722971c DM	490
2722971c DM	491	#endif /* CONFIG_COMPAT */
2e4e6a17 HW	492	#endif /* __KERNEL__ */
	493
	494	#endif /* _X_TABLES_H */