[linux-2.6-block.git] / include / linux / netfilter_ipv6 / ip6_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 IP6 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 _IP6_TABLES_H
#define _IP6_TABLES_H

#ifdef __KERNEL__
#include <linux/if.h>
#include <linux/in6.h>
#include <linux/ipv6.h>
#include <linux/skbuff.h>
#endif
#include <linux/types.h>
#include <linux/compiler.h>
#include <linux/netfilter_ipv6.h>

#include <linux/netfilter/x_tables.h>

#ifndef __KERNEL__
#define IP6T_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
#define IP6T_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
#define ip6t_match xt_match
#define ip6t_target xt_target
#define ip6t_table xt_table
#define ip6t_get_revision xt_get_revision
#define ip6t_entry_match xt_entry_match
#define ip6t_entry_target xt_entry_target
#define ip6t_standard_target xt_standard_target
#define ip6t_error_target xt_error_target
#define ip6t_counters xt_counters
#define IP6T_CONTINUE XT_CONTINUE
#define IP6T_RETURN XT_RETURN

/* Pre-iptables-1.4.0 */
#include <linux/netfilter/xt_tcpudp.h>
#define ip6t_tcp xt_tcp
#define ip6t_udp xt_udp
#define IP6T_TCP_INV_SRCPT	XT_TCP_INV_SRCPT
#define IP6T_TCP_INV_DSTPT	XT_TCP_INV_DSTPT
#define IP6T_TCP_INV_FLAGS	XT_TCP_INV_FLAGS
#define IP6T_TCP_INV_OPTION	XT_TCP_INV_OPTION
#define IP6T_TCP_INV_MASK	XT_TCP_INV_MASK
#define IP6T_UDP_INV_SRCPT	XT_UDP_INV_SRCPT
#define IP6T_UDP_INV_DSTPT	XT_UDP_INV_DSTPT
#define IP6T_UDP_INV_MASK	XT_UDP_INV_MASK

#define ip6t_counters_info xt_counters_info
#define IP6T_STANDARD_TARGET XT_STANDARD_TARGET
#define IP6T_ERROR_TARGET XT_ERROR_TARGET
#define IP6T_MATCH_ITERATE(e, fn, args...) \
	XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args)
#define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
	XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args)
#endif

/* Yes, Virginia, you have to zero the padding. */
struct ip6t_ip6 {
	/* Source and destination IP6 addr */
	struct in6_addr src, dst;		
	/* Mask for src and dest IP6 addr */
	struct in6_addr smsk, dmsk;
	char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
	unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];

	/* Upper protocol number
	 * - The allowed value is 0 (any) or protocol number of last parsable
	 *   header, which is 50 (ESP), 59 (No Next Header), 135 (MH), or
	 *   the non IPv6 extension headers.
	 * - The protocol numbers of IPv6 extension headers except of ESP and
	 *   MH do not match any packets.
	 * - You also need to set IP6T_FLAGS_PROTO to "flags" to check protocol.
	 */
	u_int16_t proto;
	/* TOS to match iff flags & IP6T_F_TOS */
	u_int8_t tos;

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

/* Values for "flag" field in struct ip6t_ip6 (general ip6 structure). */
#define IP6T_F_PROTO		0x01	/* Set if rule cares about upper 
					   protocols */
#define IP6T_F_TOS		0x02	/* Match the TOS. */
#define IP6T_F_GOTO		0x04	/* Set if jump is a goto */
#define IP6T_F_MASK		0x07	/* All possible flag bits mask. */

/* Values for "inv" field in struct ip6t_ip6. */
#define IP6T_INV_VIA_IN		0x01	/* Invert the sense of IN IFACE. */
#define IP6T_INV_VIA_OUT		0x02	/* Invert the sense of OUT IFACE */
#define IP6T_INV_TOS		0x04	/* Invert the sense of TOS. */
#define IP6T_INV_SRCIP		0x08	/* Invert the sense of SRC IP. */
#define IP6T_INV_DSTIP		0x10	/* Invert the sense of DST OP. */
#define IP6T_INV_FRAG		0x20	/* Invert the sense of FRAG. */
#define IP6T_INV_PROTO		XT_INV_PROTO
#define IP6T_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 ip6t_entry {
	struct ip6t_ip6 ipv6;

	/* 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];
};

/* Standard entry */
struct ip6t_standard {
	struct ip6t_entry entry;
	struct xt_standard_target target;
};

struct ip6t_error {
	struct ip6t_entry entry;
	struct xt_error_target target;
};

#define IP6T_ENTRY_INIT(__size)						       \
{									       \
	.target_offset	= sizeof(struct ip6t_entry),			       \
	.next_offset	= (__size),					       \
}

#define IP6T_STANDARD_INIT(__verdict)					       \
{									       \
	.entry		= IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)),       \
	.target		= XT_TARGET_INIT(XT_STANDARD_TARGET,		       \
					 sizeof(struct xt_standard_target)),   \
	.target.verdict	= -(__verdict) - 1,				       \
}

#define IP6T_ERROR_INIT							       \
{									       \
	.entry		= IP6T_ENTRY_INIT(sizeof(struct ip6t_error)),	       \
	.target		= XT_TARGET_INIT(XT_ERROR_TARGET,		       \
					 sizeof(struct xt_error_target)),      \
	.target.errorname = "ERROR",					       \
}

/*
 * 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/in6.h before adding new number here.
 */
#define IP6T_BASE_CTL			64

#define IP6T_SO_SET_REPLACE		(IP6T_BASE_CTL)
#define IP6T_SO_SET_ADD_COUNTERS	(IP6T_BASE_CTL + 1)
#define IP6T_SO_SET_MAX			IP6T_SO_SET_ADD_COUNTERS

#define IP6T_SO_GET_INFO		(IP6T_BASE_CTL)
#define IP6T_SO_GET_ENTRIES		(IP6T_BASE_CTL + 1)
#define IP6T_SO_GET_REVISION_MATCH	(IP6T_BASE_CTL + 4)
#define IP6T_SO_GET_REVISION_TARGET	(IP6T_BASE_CTL + 5)
#define IP6T_SO_GET_MAX			IP6T_SO_GET_REVISION_TARGET

/* ICMP matching stuff */
struct ip6t_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 IP6T_ICMP_INV	0x01	/* Invert the sense of type/code test */

/* The argument to IP6T_SO_GET_INFO */
struct ip6t_getinfo {
	/* Which table: caller fills this in. */
	char name[XT_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 IP6T_SO_SET_REPLACE. */
struct ip6t_replace {
	/* Which table. */
	char name[XT_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 ip6t_entry entries[0];
};

/* The argument to IP6T_SO_GET_ENTRIES. */
struct ip6t_get_entries {
	/* Which table: user fills this in. */
	char name[XT_TABLE_MAXNAMELEN];

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

	/* The entries. */
	struct ip6t_entry entrytable[0];
};

/* Helper functions */
static __inline__ struct xt_entry_target *
ip6t_get_target(struct ip6t_entry *e)
{
	return (void *)e + e->target_offset;
}

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

#ifdef __KERNEL__

#include <linux/init.h>
extern void ip6t_init(void) __init;

extern void *ip6t_alloc_initial_table(const struct xt_table *);
extern struct xt_table *ip6t_register_table(struct net *net,
					    const struct xt_table *table,
					    const struct ip6t_replace *repl);
extern void ip6t_unregister_table(struct net *net, struct xt_table *table);
extern unsigned int ip6t_do_table(struct sk_buff *skb,
				  unsigned int hook,
				  const struct net_device *in,
				  const struct net_device *out,
				  struct xt_table *table);

/* Check for an extension */
extern int ip6t_ext_hdr(u8 nexthdr);
/* find specified header and get offset to it */
extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
			 int target, unsigned short *fragoff);

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

struct compat_ip6t_entry {
	struct ip6t_ip6 ipv6;
	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];
};

static inline struct xt_entry_target *
compat_ip6t_get_target(struct compat_ip6t_entry *e)
{
	return (void *)e + e->target_offset;
}

#endif /* CONFIG_COMPAT */
#endif /*__KERNEL__*/
#endif /* _IP6_TABLES_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 IP6 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 _IP6_TABLES_H
	16	#define _IP6_TABLES_H
	17
	18	#ifdef __KERNEL__
	19	#include <linux/if.h>
1da177e4 LT	20	#include <linux/in6.h>
	21	#include <linux/ipv6.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_ipv6.h>
	27
2e4e6a17 HW	28	#include <linux/netfilter/x_tables.h>
2e4e6a17 HW	29
12b00c2c	30	#ifndef __KERNEL__
2e4e6a17 HW	31	#define IP6T_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
2e4e6a17 HW	32	#define IP6T_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
2e4e6a17 HW	33	#define ip6t_match xt_match
	34	#define ip6t_target xt_target
	35	#define ip6t_table xt_table
	36	#define ip6t_get_revision xt_get_revision
87a2e70d JE	37	#define ip6t_entry_match xt_entry_match
	38	#define ip6t_entry_target xt_entry_target
	39	#define ip6t_standard_target xt_standard_target
75f0a0fd	40	#define ip6t_error_target xt_error_target
87a2e70d	41	#define ip6t_counters xt_counters
243bf6e2 JE	42	#define IP6T_CONTINUE XT_CONTINUE
	43	#define IP6T_RETURN XT_RETURN
	44
	45	/* Pre-iptables-1.4.0 */
	46	#include <linux/netfilter/xt_tcpudp.h>
	47	#define ip6t_tcp xt_tcp
	48	#define ip6t_udp xt_udp
	49	#define IP6T_TCP_INV_SRCPT XT_TCP_INV_SRCPT
	50	#define IP6T_TCP_INV_DSTPT XT_TCP_INV_DSTPT
	51	#define IP6T_TCP_INV_FLAGS XT_TCP_INV_FLAGS
	52	#define IP6T_TCP_INV_OPTION XT_TCP_INV_OPTION
	53	#define IP6T_TCP_INV_MASK XT_TCP_INV_MASK
	54	#define IP6T_UDP_INV_SRCPT XT_UDP_INV_SRCPT
	55	#define IP6T_UDP_INV_DSTPT XT_UDP_INV_DSTPT
	56	#define IP6T_UDP_INV_MASK XT_UDP_INV_MASK
	57
	58	#define ip6t_counters_info xt_counters_info
	59	#define IP6T_STANDARD_TARGET XT_STANDARD_TARGET
	60	#define IP6T_ERROR_TARGET XT_ERROR_TARGET
	61	#define IP6T_MATCH_ITERATE(e, fn, args...) \
	62	XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args)
	63	#define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
	64	XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args)
12b00c2c	65	#endif
1da177e4 LT	66
	67	/* Yes, Virginia, you have to zero the padding. */
	68	struct ip6t_ip6 {
	69	/* Source and destination IP6 addr */
	70	struct in6_addr src, dst;
	71	/* Mask for src and dest IP6 addr */
	72	struct in6_addr smsk, dmsk;
	73	char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
	74	unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];
	75
7bfe2461 YK	76	/* Upper protocol number
	77	* - The allowed value is 0 (any) or protocol number of last parsable
	78	* header, which is 50 (ESP), 59 (No Next Header), 135 (MH), or
	79	* the non IPv6 extension headers.
	80	* - The protocol numbers of IPv6 extension headers except of ESP and
	81	* MH do not match any packets.
	82	* - You also need to set IP6T_FLAGS_PROTO to "flags" to check protocol.
	83	*/
1da177e4 LT	84	u_int16_t proto;
	85	/* TOS to match iff flags & IP6T_F_TOS */
	86	u_int8_t tos;
	87
	88	/* Flags word */
	89	u_int8_t flags;
	90	/* Inverse flags */
	91	u_int8_t invflags;
	92	};
	93
1da177e4 LT	94	/* Values for "flag" field in struct ip6t_ip6 (general ip6 structure). */
	95	#define IP6T_F_PROTO 0x01 /* Set if rule cares about upper
	96	protocols */
	97	#define IP6T_F_TOS 0x02 /* Match the TOS. */
05465343 PM	98	#define IP6T_F_GOTO 0x04 /* Set if jump is a goto */
05465343 PM	99	#define IP6T_F_MASK 0x07 /* All possible flag bits mask. */
1da177e4 LT	100
	101	/* Values for "inv" field in struct ip6t_ip6. */
	102	#define IP6T_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */
	103	#define IP6T_INV_VIA_OUT 0x02 /* Invert the sense of OUT IFACE */
	104	#define IP6T_INV_TOS 0x04 /* Invert the sense of TOS. */
	105	#define IP6T_INV_SRCIP 0x08 /* Invert the sense of SRC IP. */
	106	#define IP6T_INV_DSTIP 0x10 /* Invert the sense of DST OP. */
	107	#define IP6T_INV_FRAG 0x20 /* Invert the sense of FRAG. */
2e4e6a17	108	#define IP6T_INV_PROTO XT_INV_PROTO
1da177e4 LT	109	#define IP6T_INV_MASK 0x7F /* All possible flag bits mask. */
	110
	111	/* This structure defines each of the firewall rules. Consists of 3
	112	parts which are 1) general IP header stuff 2) match specific
	113	stuff 3) the target to perform if the rule matches */
d94d9fee	114	struct ip6t_entry {
1da177e4 LT	115	struct ip6t_ip6 ipv6;
	116
	117	/* Mark with fields that we care about. */
	118	unsigned int nfcache;
	119
	120	/* Size of ipt_entry + matches */
	121	u_int16_t target_offset;
	122	/* Size of ipt_entry + matches + target */
	123	u_int16_t next_offset;
	124
	125	/* Back pointer */
	126	unsigned int comefrom;
	127
	128	/* Packet and byte counters. */
2e4e6a17	129	struct xt_counters counters;
1da177e4 LT	130
	131	/* The matches (if any), then the target. */
	132	unsigned char elems[0];
	133	};
	134
9934e81c	135	/* Standard entry */
d94d9fee	136	struct ip6t_standard {
9934e81c	137	struct ip6t_entry entry;
87a2e70d	138	struct xt_standard_target target;
9934e81c PM	139	};
9934e81c PM	140
d94d9fee	141	struct ip6t_error {
9934e81c	142	struct ip6t_entry entry;
75f0a0fd	143	struct xt_error_target target;
9934e81c PM	144	};
9934e81c PM	145
3c2ad469 PM	146	#define IP6T_ENTRY_INIT(__size) \
	147	{ \
	148	.target_offset = sizeof(struct ip6t_entry), \
	149	.next_offset = (__size), \
	150	}
	151
	152	#define IP6T_STANDARD_INIT(__verdict) \
	153	{ \
	154	.entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)), \
243bf6e2	155	.target = XT_TARGET_INIT(XT_STANDARD_TARGET, \
87a2e70d	156	sizeof(struct xt_standard_target)), \
3c2ad469 PM	157	.target.verdict = -(__verdict) - 1, \
	158	}
	159
	160	#define IP6T_ERROR_INIT \
	161	{ \
	162	.entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_error)), \
243bf6e2	163	.target = XT_TARGET_INIT(XT_ERROR_TARGET, \
75f0a0fd	164	sizeof(struct xt_error_target)), \
3c2ad469 PM	165	.target.errorname = "ERROR", \
	166	}
	167
1da177e4 LT	168	/*
	169	* New IP firewall options for [gs]etsockopt at the RAW IP level.
	170	* Unlike BSD Linux inherits IP options so you don't have to use
b96e7ecb YK	171	* a raw socket for this. Instead we check rights in the calls.
	172	*
	173	* ATTENTION: check linux/in6.h before adding new number here.
	174	*/
	175	#define IP6T_BASE_CTL 64
	176
	177	#define IP6T_SO_SET_REPLACE (IP6T_BASE_CTL)
	178	#define IP6T_SO_SET_ADD_COUNTERS (IP6T_BASE_CTL + 1)
	179	#define IP6T_SO_SET_MAX IP6T_SO_SET_ADD_COUNTERS
	180
	181	#define IP6T_SO_GET_INFO (IP6T_BASE_CTL)
	182	#define IP6T_SO_GET_ENTRIES (IP6T_BASE_CTL + 1)
	183	#define IP6T_SO_GET_REVISION_MATCH (IP6T_BASE_CTL + 4)
	184	#define IP6T_SO_GET_REVISION_TARGET (IP6T_BASE_CTL + 5)
	185	#define IP6T_SO_GET_MAX IP6T_SO_GET_REVISION_TARGET
1da177e4	186
1da177e4	187	/* ICMP matching stuff */
d94d9fee	188	struct ip6t_icmp {
1da177e4 LT	189	u_int8_t type; /* type to match */
	190	u_int8_t code[2]; /* range of code */
	191	u_int8_t invflags; /* Inverse flags */
	192	};
	193
	194	/* Values for "inv" field for struct ipt_icmp. */
	195	#define IP6T_ICMP_INV 0x01 /* Invert the sense of type/code test */
	196
	197	/* The argument to IP6T_SO_GET_INFO */
d94d9fee	198	struct ip6t_getinfo {
1da177e4	199	/* Which table: caller fills this in. */
12b00c2c	200	char name[XT_TABLE_MAXNAMELEN];
1da177e4 LT	201
	202	/* Kernel fills these in. */
	203	/* Which hook entry points are valid: bitmask */
	204	unsigned int valid_hooks;
	205
	206	/* Hook entry points: one per netfilter hook. */
6e23ae2a	207	unsigned int hook_entry[NF_INET_NUMHOOKS];
1da177e4 LT	208
1da177e4 LT	209	/* Underflow points. */
6e23ae2a	210	unsigned int underflow[NF_INET_NUMHOOKS];
1da177e4 LT	211
	212	/* Number of entries */
	213	unsigned int num_entries;
	214
	215	/* Size of entries. */
	216	unsigned int size;
	217	};
	218
	219	/* The argument to IP6T_SO_SET_REPLACE. */
d94d9fee	220	struct ip6t_replace {
1da177e4	221	/* Which table. */
12b00c2c	222	char name[XT_TABLE_MAXNAMELEN];
1da177e4 LT	223
	224	/* Which hook entry points are valid: bitmask. You can't
	225	change this. */
	226	unsigned int valid_hooks;
	227
	228	/* Number of entries */
	229	unsigned int num_entries;
	230
	231	/* Total size of new entries */
	232	unsigned int size;
	233
	234	/* Hook entry points. */
6e23ae2a	235	unsigned int hook_entry[NF_INET_NUMHOOKS];
1da177e4 LT	236
1da177e4 LT	237	/* Underflow points. */
6e23ae2a	238	unsigned int underflow[NF_INET_NUMHOOKS];
1da177e4 LT	239
	240	/* Information about old entries: */
	241	/* Number of counters (must be equal to current number of entries). */
	242	unsigned int num_counters;
	243	/* The old entries' counters. */
2e4e6a17	244	struct xt_counters __user *counters;
1da177e4 LT	245
	246	/* The entries (hang off end: not really an array). */
	247	struct ip6t_entry entries[0];
	248	};
	249
1da177e4	250	/* The argument to IP6T_SO_GET_ENTRIES. */
d94d9fee	251	struct ip6t_get_entries {
1da177e4	252	/* Which table: user fills this in. */
12b00c2c	253	char name[XT_TABLE_MAXNAMELEN];
1da177e4 LT	254
	255	/* User fills this in: total entry size. */
	256	unsigned int size;
	257
	258	/* The entries. */
	259	struct ip6t_entry entrytable[0];
	260	};
	261
1da177e4	262	/* Helper functions */
87a2e70d	263	static __inline__ struct xt_entry_target *
1da177e4 LT	264	ip6t_get_target(struct ip6t_entry *e)
	265	{
	266	return (void *)e + e->target_offset;
	267	}
	268
1da177e4 LT	269	/*
	270	* Main firewall chains definitions and global var's definitions.
	271	*/
	272
	273	#ifdef __KERNEL__
	274
	275	#include <linux/init.h>
	276	extern void ip6t_init(void) __init;
	277
e3eaa991	278	extern void ip6t_alloc_initial_table(const struct xt_table );
336b517f	279	extern struct xt_table ip6t_register_table(struct net net,
35aad0ff	280	const struct xt_table *table,
44d34e72	281	const struct ip6t_replace *repl);
f54e9367	282	extern void ip6t_unregister_table(struct net net, struct xt_table table);
3db05fea	283	extern unsigned int ip6t_do_table(struct sk_buff *skb,
1da177e4 LT	284	unsigned int hook,
	285	const struct net_device *in,
	286	const struct net_device *out,
e60a13e0	287	struct xt_table *table);
1da177e4 LT	288
	289	/* Check for an extension */
	290	extern int ip6t_ext_hdr(u8 nexthdr);
e674d0f3 YK	291	/* find specified header and get offset to it */
e674d0f3 YK	292	extern int ipv6_find_hdr(const struct sk_buff skb, unsigned int offset,
b777e0ce	293	int target, unsigned short *fragoff);
1da177e4	294
3bc3fe5e PM	295	#ifdef CONFIG_COMPAT
	296	#include <net/compat.h>
	297
d94d9fee	298	struct compat_ip6t_entry {
3bc3fe5e PM	299	struct ip6t_ip6 ipv6;
	300	compat_uint_t nfcache;
	301	u_int16_t target_offset;
	302	u_int16_t next_offset;
	303	compat_uint_t comefrom;
	304	struct compat_xt_counters counters;
	305	unsigned char elems[0];
	306	};
	307
87a2e70d	308	static inline struct xt_entry_target *
3bc3fe5e PM	309	compat_ip6t_get_target(struct compat_ip6t_entry *e)
	310	{
	311	return (void *)e + e->target_offset;
	312	}
	313
3bc3fe5e	314	#endif /* CONFIG_COMPAT */
1da177e4 LT	315	#endif /__KERNEL__/
1da177e4 LT	316	#endif /* _IP6_TABLES_H */