[net-next-2.6.git] / include / linux / netfilter_ipv4 / ip_tables.h

/*
 * 25-Jul-1998 Major changes to allow for ip chain table
 *
 * 3-Jan-2000 Named tables to allow packet selection for different uses.
 */

/*
 * 	Format of an IP firewall descriptor
 *
 * 	src, dst, src_mask, dst_mask are always stored in network byte order.
 * 	flags are stored in host byte order (of course).
 * 	Port numbers are stored in HOST byte order.
 */

#ifndef _IPTABLES_H
#define _IPTABLES_H

#ifdef __KERNEL__
#include <linux/if.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/skbuff.h>
#endif
#include <linux/types.h>
#include <linux/compiler.h>
#include <linux/netfilter_ipv4.h>

#include <linux/netfilter/x_tables.h>

#define IPT_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
#define IPT_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
#define ipt_match xt_match
#define ipt_target xt_target
#define ipt_table xt_table
#define ipt_get_revision xt_get_revision

/* Yes, Virginia, you have to zero the padding. */
struct ipt_ip {
	/* Source and destination IP addr */
	struct in_addr src, dst;
	/* Mask for src and dest IP addr */
	struct in_addr smsk, dmsk;
	char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
	unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];

	/* Protocol, 0 = ANY */
	u_int16_t proto;

	/* Flags word */
	u_int8_t flags;
	/* Inverse flags */
	u_int8_t invflags;
};

#define ipt_entry_match xt_entry_match
#define ipt_entry_target xt_entry_target
#define ipt_standard_target xt_standard_target

#define ipt_counters xt_counters

/* Values for "flag" field in struct ipt_ip (general ip structure). */
#define IPT_F_FRAG		0x01	/* Set if rule is a fragment rule */
#define IPT_F_GOTO		0x02	/* Set if jump is a goto */
#define IPT_F_MASK		0x03	/* All possible flag bits mask. */

/* Values for "inv" field in struct ipt_ip. */
#define IPT_INV_VIA_IN		0x01	/* Invert the sense of IN IFACE. */
#define IPT_INV_VIA_OUT		0x02	/* Invert the sense of OUT IFACE */
#define IPT_INV_TOS		0x04	/* Invert the sense of TOS. */
#define IPT_INV_SRCIP		0x08	/* Invert the sense of SRC IP. */
#define IPT_INV_DSTIP		0x10	/* Invert the sense of DST OP. */
#define IPT_INV_FRAG		0x20	/* Invert the sense of FRAG. */
#define IPT_INV_PROTO		XT_INV_PROTO
#define IPT_INV_MASK		0x7F	/* All possible flag bits mask. */

/* This structure defines each of the firewall rules.  Consists of 3
   parts which are 1) general IP header stuff 2) match specific
   stuff 3) the target to perform if the rule matches */
struct ipt_entry {
	struct ipt_ip ip;

	/* Mark with fields that we care about. */
	unsigned int nfcache;

	/* Size of ipt_entry + matches */
	u_int16_t target_offset;
	/* Size of ipt_entry + matches + target */
	u_int16_t next_offset;

	/* Back pointer */
	unsigned int comefrom;

	/* Packet and byte counters. */
	struct xt_counters counters;

	/* The matches (if any), then the target. */
	unsigned char elems[0];
};

/*
 * New IP firewall options for [gs]etsockopt at the RAW IP level.
 * Unlike BSD Linux inherits IP options so you don't have to use a raw
 * socket for this. Instead we check rights in the calls.
 *
 * ATTENTION: check linux/in.h before adding new number here.
 */
#define IPT_BASE_CTL		64

#define IPT_SO_SET_REPLACE	(IPT_BASE_CTL)
#define IPT_SO_SET_ADD_COUNTERS	(IPT_BASE_CTL + 1)
#define IPT_SO_SET_MAX		IPT_SO_SET_ADD_COUNTERS

#define IPT_SO_GET_INFO			(IPT_BASE_CTL)
#define IPT_SO_GET_ENTRIES		(IPT_BASE_CTL + 1)
#define IPT_SO_GET_REVISION_MATCH	(IPT_BASE_CTL + 2)
#define IPT_SO_GET_REVISION_TARGET	(IPT_BASE_CTL + 3)
#define IPT_SO_GET_MAX			IPT_SO_GET_REVISION_TARGET

#define IPT_CONTINUE XT_CONTINUE
#define IPT_RETURN XT_RETURN

#include <linux/netfilter/xt_tcpudp.h>
#define ipt_udp xt_udp
#define ipt_tcp xt_tcp

#define IPT_TCP_INV_SRCPT	XT_TCP_INV_SRCPT
#define IPT_TCP_INV_DSTPT	XT_TCP_INV_DSTPT
#define IPT_TCP_INV_FLAGS	XT_TCP_INV_FLAGS
#define IPT_TCP_INV_OPTION	XT_TCP_INV_OPTION
#define IPT_TCP_INV_MASK	XT_TCP_INV_MASK

#define IPT_UDP_INV_SRCPT	XT_UDP_INV_SRCPT
#define IPT_UDP_INV_DSTPT	XT_UDP_INV_DSTPT
#define IPT_UDP_INV_MASK	XT_UDP_INV_MASK

/* ICMP matching stuff */
struct ipt_icmp {
	u_int8_t type;				/* type to match */
	u_int8_t code[2];			/* range of code */
	u_int8_t invflags;			/* Inverse flags */
};

/* Values for "inv" field for struct ipt_icmp. */
#define IPT_ICMP_INV	0x01	/* Invert the sense of type/code test */

/* The argument to IPT_SO_GET_INFO */
struct ipt_getinfo {
	/* Which table: caller fills this in. */
	char name[IPT_TABLE_MAXNAMELEN];

	/* Kernel fills these in. */
	/* Which hook entry points are valid: bitmask */
	unsigned int valid_hooks;

	/* Hook entry points: one per netfilter hook. */
	unsigned int hook_entry[NF_INET_NUMHOOKS];

	/* Underflow points. */
	unsigned int underflow[NF_INET_NUMHOOKS];

	/* Number of entries */
	unsigned int num_entries;

	/* Size of entries. */
	unsigned int size;
};

/* The argument to IPT_SO_SET_REPLACE. */
struct ipt_replace {
	/* Which table. */
	char name[IPT_TABLE_MAXNAMELEN];

	/* Which hook entry points are valid: bitmask.  You can't
           change this. */
	unsigned int valid_hooks;

	/* Number of entries */
	unsigned int num_entries;

	/* Total size of new entries */
	unsigned int size;

	/* Hook entry points. */
	unsigned int hook_entry[NF_INET_NUMHOOKS];

	/* Underflow points. */
	unsigned int underflow[NF_INET_NUMHOOKS];

	/* Information about old entries: */
	/* Number of counters (must be equal to current number of entries). */
	unsigned int num_counters;
	/* The old entries' counters. */
	struct xt_counters __user *counters;

	/* The entries (hang off end: not really an array). */
	struct ipt_entry entries[0];
};

/* The argument to IPT_SO_ADD_COUNTERS. */
#define ipt_counters_info xt_counters_info

/* The argument to IPT_SO_GET_ENTRIES. */
struct ipt_get_entries {
	/* Which table: user fills this in. */
	char name[IPT_TABLE_MAXNAMELEN];

	/* User fills this in: total entry size. */
	unsigned int size;

	/* The entries. */
	struct ipt_entry entrytable[0];
};

/* Standard return verdict, or do jump. */
#define IPT_STANDARD_TARGET XT_STANDARD_TARGET
/* Error verdict. */
#define IPT_ERROR_TARGET XT_ERROR_TARGET

/* Helper functions */
static __inline__ struct ipt_entry_target *
ipt_get_target(struct ipt_entry *e)
{
	return (void *)e + e->target_offset;
}

#ifndef __KERNEL__
/* fn returns 0 to continue iteration */
#define IPT_MATCH_ITERATE(e, fn, args...) \
	XT_MATCH_ITERATE(struct ipt_entry, e, fn, ## args)

/* fn returns 0 to continue iteration */
#define IPT_ENTRY_ITERATE(entries, size, fn, args...) \
	XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args)
#endif

/*
 *	Main firewall chains definitions and global var's definitions.
 */
#ifdef __KERNEL__

#include <linux/init.h>
extern void ipt_init(void) __init;

extern struct xt_table *ipt_register_table(struct net *net,
					   const struct xt_table *table,
					   const struct ipt_replace *repl);
extern void ipt_unregister_table(struct net *net, struct xt_table *table);

/* Standard entry. */
struct ipt_standard {
	struct ipt_entry entry;
	struct ipt_standard_target target;
};

struct ipt_error_target {
	struct ipt_entry_target target;
	char errorname[IPT_FUNCTION_MAXNAMELEN];
};

struct ipt_error {
	struct ipt_entry entry;
	struct ipt_error_target target;
};

#define IPT_ENTRY_INIT(__size)						       \
{									       \
	.target_offset	= sizeof(struct ipt_entry),			       \
	.next_offset	= (__size),					       \
}

#define IPT_STANDARD_INIT(__verdict)					       \
{									       \
	.entry		= IPT_ENTRY_INIT(sizeof(struct ipt_standard)),	       \
	.target		= XT_TARGET_INIT(IPT_STANDARD_TARGET,		       \
					 sizeof(struct xt_standard_target)),   \
	.target.verdict	= -(__verdict) - 1,				       \
}

#define IPT_ERROR_INIT							       \
{									       \
	.entry		= IPT_ENTRY_INIT(sizeof(struct ipt_error)),	       \
	.target		= XT_TARGET_INIT(IPT_ERROR_TARGET,		       \
					 sizeof(struct ipt_error_target)),     \
	.target.errorname = "ERROR",					       \
}

extern void *ipt_alloc_initial_table(const struct xt_table *);
extern unsigned int ipt_do_table(struct sk_buff *skb,
				 unsigned int hook,
				 const struct net_device *in,
				 const struct net_device *out,
				 struct xt_table *table);

#define IPT_ALIGN(s) XT_ALIGN(s)

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

struct compat_ipt_entry {
	struct ipt_ip ip;
	compat_uint_t nfcache;
	u_int16_t target_offset;
	u_int16_t next_offset;
	compat_uint_t comefrom;
	struct compat_xt_counters counters;
	unsigned char elems[0];
};

/* Helper functions */
static inline struct ipt_entry_target *
compat_ipt_get_target(struct compat_ipt_entry *e)
{
	return (void *)e + e->target_offset;
}

#define COMPAT_IPT_ALIGN(s) 	COMPAT_XT_ALIGN(s)

#endif /* CONFIG_COMPAT */
#endif /*__KERNEL__*/
#endif /* _IPTABLES_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* 25-Jul-1998 Major changes to allow for ip chain table
	3	*
	4	* 3-Jan-2000 Named tables to allow packet selection for different uses.
	5	*/
	6
	7	/*
	8	* Format of an IP firewall descriptor
	9	*
	10	* src, dst, src_mask, dst_mask are always stored in network byte order.
	11	* flags are stored in host byte order (of course).
	12	* Port numbers are stored in HOST byte order.
	13	*/
	14
	15	#ifndef _IPTABLES_H
	16	#define _IPTABLES_H
	17
	18	#ifdef __KERNEL__
	19	#include <linux/if.h>
1da177e4 LT	20	#include <linux/in.h>
	21	#include <linux/ip.h>
	22	#include <linux/skbuff.h>
	23	#endif
c8942f1f	24	#include <linux/types.h>
1da177e4 LT	25	#include <linux/compiler.h>
	26	#include <linux/netfilter_ipv4.h>
	27
2e4e6a17 HW	28	#include <linux/netfilter/x_tables.h>
	29
	30	#define IPT_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
2748e5de	31	#define IPT_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
2e4e6a17 HW	32	#define ipt_match xt_match
	33	#define ipt_target xt_target
	34	#define ipt_table xt_table
	35	#define ipt_get_revision xt_get_revision
1da177e4 LT	36
	37	/* Yes, Virginia, you have to zero the padding. */
	38	struct ipt_ip {
	39	/* Source and destination IP addr */
	40	struct in_addr src, dst;
	41	/* Mask for src and dest IP addr */
	42	struct in_addr smsk, dmsk;
	43	char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
	44	unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];
	45
	46	/* Protocol, 0 = ANY */
	47	u_int16_t proto;
	48
	49	/* Flags word */
	50	u_int8_t flags;
	51	/* Inverse flags */
	52	u_int8_t invflags;
	53	};
	54
1e30a014 DM	55	#define ipt_entry_match xt_entry_match
	56	#define ipt_entry_target xt_entry_target
	57	#define ipt_standard_target xt_standard_target
1da177e4	58
2e4e6a17	59	#define ipt_counters xt_counters
1da177e4 LT	60
	61	/* Values for "flag" field in struct ipt_ip (general ip structure). */
	62	#define IPT_F_FRAG 0x01 /* Set if rule is a fragment rule */
05465343 PM	63	#define IPT_F_GOTO 0x02 /* Set if jump is a goto */
05465343 PM	64	#define IPT_F_MASK 0x03 /* All possible flag bits mask. */
1da177e4 LT	65
	66	/* Values for "inv" field in struct ipt_ip. */
	67	#define IPT_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */
	68	#define IPT_INV_VIA_OUT 0x02 /* Invert the sense of OUT IFACE */
	69	#define IPT_INV_TOS 0x04 /* Invert the sense of TOS. */
	70	#define IPT_INV_SRCIP 0x08 /* Invert the sense of SRC IP. */
	71	#define IPT_INV_DSTIP 0x10 /* Invert the sense of DST OP. */
	72	#define IPT_INV_FRAG 0x20 /* Invert the sense of FRAG. */
2e4e6a17	73	#define IPT_INV_PROTO XT_INV_PROTO
1da177e4 LT	74	#define IPT_INV_MASK 0x7F /* All possible flag bits mask. */
	75
	76	/* This structure defines each of the firewall rules. Consists of 3
	77	parts which are 1) general IP header stuff 2) match specific
	78	stuff 3) the target to perform if the rule matches */
d94d9fee	79	struct ipt_entry {
1da177e4 LT	80	struct ipt_ip ip;
	81
	82	/* Mark with fields that we care about. */
	83	unsigned int nfcache;
	84
	85	/* Size of ipt_entry + matches */
	86	u_int16_t target_offset;
	87	/* Size of ipt_entry + matches + target */
	88	u_int16_t next_offset;
	89
	90	/* Back pointer */
	91	unsigned int comefrom;
	92
	93	/* Packet and byte counters. */
2e4e6a17	94	struct xt_counters counters;
1da177e4 LT	95
	96	/* The matches (if any), then the target. */
	97	unsigned char elems[0];
	98	};
	99
	100	/*
	101	* New IP firewall options for [gs]etsockopt at the RAW IP level.
	102	* Unlike BSD Linux inherits IP options so you don't have to use a raw
b96e7ecb YK	103	* socket for this. Instead we check rights in the calls.
	104	*
	105	* ATTENTION: check linux/in.h before adding new number here.
	106	*/
	107	#define IPT_BASE_CTL 64
	108
	109	#define IPT_SO_SET_REPLACE (IPT_BASE_CTL)
	110	#define IPT_SO_SET_ADD_COUNTERS (IPT_BASE_CTL + 1)
	111	#define IPT_SO_SET_MAX IPT_SO_SET_ADD_COUNTERS
	112
	113	#define IPT_SO_GET_INFO (IPT_BASE_CTL)
	114	#define IPT_SO_GET_ENTRIES (IPT_BASE_CTL + 1)
	115	#define IPT_SO_GET_REVISION_MATCH (IPT_BASE_CTL + 2)
	116	#define IPT_SO_GET_REVISION_TARGET (IPT_BASE_CTL + 3)
	117	#define IPT_SO_GET_MAX IPT_SO_GET_REVISION_TARGET
1da177e4	118
2e4e6a17 HW	119	#define IPT_CONTINUE XT_CONTINUE
2e4e6a17 HW	120	#define IPT_RETURN XT_RETURN
1da177e4	121
2e4e6a17 HW	122	#include <linux/netfilter/xt_tcpudp.h>
	123	#define ipt_udp xt_udp
	124	#define ipt_tcp xt_tcp
1da177e4	125
2e4e6a17 HW	126	#define IPT_TCP_INV_SRCPT XT_TCP_INV_SRCPT
	127	#define IPT_TCP_INV_DSTPT XT_TCP_INV_DSTPT
	128	#define IPT_TCP_INV_FLAGS XT_TCP_INV_FLAGS
	129	#define IPT_TCP_INV_OPTION XT_TCP_INV_OPTION
	130	#define IPT_TCP_INV_MASK XT_TCP_INV_MASK
1da177e4	131
2e4e6a17 HW	132	#define IPT_UDP_INV_SRCPT XT_UDP_INV_SRCPT
	133	#define IPT_UDP_INV_DSTPT XT_UDP_INV_DSTPT
	134	#define IPT_UDP_INV_MASK XT_UDP_INV_MASK
1da177e4 LT	135
1da177e4 LT	136	/* ICMP matching stuff */
d94d9fee	137	struct ipt_icmp {
1da177e4 LT	138	u_int8_t type; /* type to match */
	139	u_int8_t code[2]; /* range of code */
	140	u_int8_t invflags; /* Inverse flags */
	141	};
	142
	143	/* Values for "inv" field for struct ipt_icmp. */
	144	#define IPT_ICMP_INV 0x01 /* Invert the sense of type/code test */
	145
	146	/* The argument to IPT_SO_GET_INFO */
d94d9fee	147	struct ipt_getinfo {
1da177e4 LT	148	/* Which table: caller fills this in. */
	149	char name[IPT_TABLE_MAXNAMELEN];
	150
	151	/* Kernel fills these in. */
	152	/* Which hook entry points are valid: bitmask */
	153	unsigned int valid_hooks;
	154
	155	/* Hook entry points: one per netfilter hook. */
6e23ae2a	156	unsigned int hook_entry[NF_INET_NUMHOOKS];
1da177e4 LT	157
1da177e4 LT	158	/* Underflow points. */
6e23ae2a	159	unsigned int underflow[NF_INET_NUMHOOKS];
1da177e4 LT	160
	161	/* Number of entries */
	162	unsigned int num_entries;
	163
	164	/* Size of entries. */
	165	unsigned int size;
	166	};
	167
	168	/* The argument to IPT_SO_SET_REPLACE. */
d94d9fee	169	struct ipt_replace {
1da177e4 LT	170	/* Which table. */
	171	char name[IPT_TABLE_MAXNAMELEN];
	172
	173	/* Which hook entry points are valid: bitmask. You can't
	174	change this. */
	175	unsigned int valid_hooks;
	176
	177	/* Number of entries */
	178	unsigned int num_entries;
	179
	180	/* Total size of new entries */
	181	unsigned int size;
	182
	183	/* Hook entry points. */
6e23ae2a	184	unsigned int hook_entry[NF_INET_NUMHOOKS];
1da177e4 LT	185
1da177e4 LT	186	/* Underflow points. */
6e23ae2a	187	unsigned int underflow[NF_INET_NUMHOOKS];
1da177e4 LT	188
	189	/* Information about old entries: */
	190	/* Number of counters (must be equal to current number of entries). */
	191	unsigned int num_counters;
	192	/* The old entries' counters. */
2e4e6a17	193	struct xt_counters __user *counters;
1da177e4 LT	194
	195	/* The entries (hang off end: not really an array). */
	196	struct ipt_entry entries[0];
	197	};
	198
	199	/* The argument to IPT_SO_ADD_COUNTERS. */
2e4e6a17	200	#define ipt_counters_info xt_counters_info
1da177e4 LT	201
1da177e4 LT	202	/* The argument to IPT_SO_GET_ENTRIES. */
d94d9fee	203	struct ipt_get_entries {
1da177e4 LT	204	/* Which table: user fills this in. */
	205	char name[IPT_TABLE_MAXNAMELEN];
	206
	207	/* User fills this in: total entry size. */
	208	unsigned int size;
	209
	210	/* The entries. */
	211	struct ipt_entry entrytable[0];
	212	};
	213
1da177e4	214	/* Standard return verdict, or do jump. */
2e4e6a17	215	#define IPT_STANDARD_TARGET XT_STANDARD_TARGET
1da177e4	216	/* Error verdict. */
2e4e6a17	217	#define IPT_ERROR_TARGET XT_ERROR_TARGET
1da177e4 LT	218
	219	/* Helper functions */
	220	static __inline__ struct ipt_entry_target *
	221	ipt_get_target(struct ipt_entry *e)
	222	{
	223	return (void *)e + e->target_offset;
	224	}
	225
dcea992a	226	#ifndef __KERNEL__
1da177e4	227	/* fn returns 0 to continue iteration */
89c002d6 PM	228	#define IPT_MATCH_ITERATE(e, fn, args...) \
89c002d6 PM	229	XT_MATCH_ITERATE(struct ipt_entry, e, fn, ## args)
1da177e4 LT	230
1da177e4 LT	231	/* fn returns 0 to continue iteration */
89c002d6 PM	232	#define IPT_ENTRY_ITERATE(entries, size, fn, args...) \
89c002d6 PM	233	XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args)
72b2b1dd	234	#endif
1da177e4 LT	235
	236	/*
	237	* Main firewall chains definitions and global var's definitions.
	238	*/
	239	#ifdef __KERNEL__
	240
	241	#include <linux/init.h>
	242	extern void ipt_init(void) __init;
	243
44d34e72	244	extern struct xt_table ipt_register_table(struct net net,
35aad0ff	245	const struct xt_table *table,
44d34e72	246	const struct ipt_replace *repl);
f54e9367	247	extern void ipt_unregister_table(struct net net, struct xt_table table);
1da177e4	248
1da177e4	249	/* Standard entry. */
d94d9fee	250	struct ipt_standard {
1da177e4 LT	251	struct ipt_entry entry;
	252	struct ipt_standard_target target;
	253	};
	254
d94d9fee	255	struct ipt_error_target {
1da177e4 LT	256	struct ipt_entry_target target;
	257	char errorname[IPT_FUNCTION_MAXNAMELEN];
	258	};
	259
d94d9fee	260	struct ipt_error {
1da177e4 LT	261	struct ipt_entry entry;
	262	struct ipt_error_target target;
	263	};
	264
3c2ad469 PM	265	#define IPT_ENTRY_INIT(__size) \
	266	{ \
	267	.target_offset = sizeof(struct ipt_entry), \
	268	.next_offset = (__size), \
	269	}
	270
	271	#define IPT_STANDARD_INIT(__verdict) \
	272	{ \
	273	.entry = IPT_ENTRY_INIT(sizeof(struct ipt_standard)), \
	274	.target = XT_TARGET_INIT(IPT_STANDARD_TARGET, \
	275	sizeof(struct xt_standard_target)), \
	276	.target.verdict = -(__verdict) - 1, \
	277	}
	278
	279	#define IPT_ERROR_INIT \
	280	{ \
	281	.entry = IPT_ENTRY_INIT(sizeof(struct ipt_error)), \
	282	.target = XT_TARGET_INIT(IPT_ERROR_TARGET, \
	283	sizeof(struct ipt_error_target)), \
	284	.target.errorname = "ERROR", \
	285	}
	286
e3eaa991	287	extern void ipt_alloc_initial_table(const struct xt_table );
3db05fea	288	extern unsigned int ipt_do_table(struct sk_buff *skb,
1da177e4 LT	289	unsigned int hook,
	290	const struct net_device *in,
	291	const struct net_device *out,
e60a13e0	292	struct xt_table *table);
1da177e4	293
2e4e6a17	294	#define IPT_ALIGN(s) XT_ALIGN(s)
2722971c DM	295
	296	#ifdef CONFIG_COMPAT
	297	#include <net/compat.h>
	298
d94d9fee	299	struct compat_ipt_entry {
2722971c DM	300	struct ipt_ip ip;
	301	compat_uint_t nfcache;
	302	u_int16_t target_offset;
	303	u_int16_t next_offset;
	304	compat_uint_t comefrom;
	305	struct compat_xt_counters counters;
	306	unsigned char elems[0];
	307	};
	308
73cd598d PM	309	/* Helper functions */
	310	static inline struct ipt_entry_target *
	311	compat_ipt_get_target(struct compat_ipt_entry *e)
	312	{
	313	return (void *)e + e->target_offset;
	314	}
	315
2722971c DM	316	#define COMPAT_IPT_ALIGN(s) COMPAT_XT_ALIGN(s)
	317
	318	#endif /* CONFIG_COMPAT */
1da177e4 LT	319	#endif /__KERNEL__/
1da177e4 LT	320	#endif /* _IPTABLES_H */