[deliverable/linux.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>

#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

/* 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;
};

#define ip6t_entry_match xt_entry_match
#define ip6t_entry_target xt_entry_target
#define ip6t_standard_target xt_standard_target

#define ip6t_counters	xt_counters

/* 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 ip6t_standard_target target;
};

struct ip6t_error_target
{
	struct ip6t_entry_target target;
	char errorname[IP6T_FUNCTION_MAXNAMELEN];
};

struct ip6t_error
{
	struct ip6t_entry entry;
	struct ip6t_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(IP6T_STANDARD_TARGET,		       \
					 sizeof(struct ip6t_standard_target)), \
	.target.verdict	= -(__verdict) - 1,				       \
}

#define IP6T_ERROR_INIT							       \
{									       \
	.entry		= IP6T_ENTRY_INIT(sizeof(struct ip6t_error)),	       \
	.target		= XT_TARGET_INIT(IP6T_ERROR_TARGET,		       \
					 sizeof(struct ip6t_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

/* CONTINUE verdict for targets */
#define IP6T_CONTINUE XT_CONTINUE

/* For standard target */
#define IP6T_RETURN XT_RETURN

/* TCP/UDP matching stuff */
#include <linux/netfilter/xt_tcpudp.h>

#define ip6t_tcp xt_tcp
#define ip6t_udp xt_udp

/* Values for "inv" field in struct ipt_tcp. */
#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

/* Values for "invflags" field in struct ipt_udp. */
#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

/* 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[IP6T_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[IP6T_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_ADD_COUNTERS. */
#define ip6t_counters_info xt_counters_info

/* The argument to IP6T_SO_GET_ENTRIES. */
struct ip6t_get_entries
{
	/* Which table: user fills this in. */
	char name[IP6T_TABLE_MAXNAMELEN];

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

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

/* Standard return verdict, or do jump. */
#define IP6T_STANDARD_TARGET XT_STANDARD_TARGET
/* Error verdict. */
#define IP6T_ERROR_TARGET XT_ERROR_TARGET

/* Helper functions */
static __inline__ struct ip6t_entry_target *
ip6t_get_target(struct ip6t_entry *e)
{
	return (void *)e + e->target_offset;
}

/* fn returns 0 to continue iteration */
#define IP6T_MATCH_ITERATE(e, fn, args...) \
	XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args)

/* fn returns 0 to continue iteration */
#define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
	XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args)

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

#ifdef __KERNEL__

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

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 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);

extern int ip6_masked_addrcmp(const struct in6_addr *addr1,
			      const struct in6_addr *mask,
			      const struct in6_addr *addr2);

#define IP6T_ALIGN(s) XT_ALIGN(s)

#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 ip6t_entry_target *
compat_ip6t_get_target(struct compat_ip6t_entry *e)
{
	return (void *)e + e->target_offset;
}

#define COMPAT_IP6T_ALIGN(s)	COMPAT_XT_ALIGN(s)

/* fn returns 0 to continue iteration */
#define COMPAT_IP6T_MATCH_ITERATE(e, fn, args...) \
	XT_MATCH_ITERATE(struct compat_ip6t_entry, e, fn, ## args)

/* fn returns 0 to continue iteration */
#define COMPAT_IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
	XT_ENTRY_ITERATE(struct compat_ip6t_entry, entries, size, fn, ## args)

#define COMPAT_IP6T_ENTRY_ITERATE_CONTINUE(entries, size, n, fn, args...) \
	XT_ENTRY_ITERATE_CONTINUE(struct compat_ip6t_entry, entries, size, n, \
				  fn, ## args)

#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>
	29
	30	#define IP6T_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
	31	#define IP6T_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
	32
	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
1da177e4 LT	37
	38	/* Yes, Virginia, you have to zero the padding. */
	39	struct ip6t_ip6 {
	40	/* Source and destination IP6 addr */
	41	struct in6_addr src, dst;
	42	/* Mask for src and dest IP6 addr */
	43	struct in6_addr smsk, dmsk;
	44	char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
	45	unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];
	46
7bfe2461 YK	47	/* Upper protocol number
	48	* - The allowed value is 0 (any) or protocol number of last parsable
	49	* header, which is 50 (ESP), 59 (No Next Header), 135 (MH), or
	50	* the non IPv6 extension headers.
	51	* - The protocol numbers of IPv6 extension headers except of ESP and
	52	* MH do not match any packets.
	53	* - You also need to set IP6T_FLAGS_PROTO to "flags" to check protocol.
	54	*/
1da177e4 LT	55	u_int16_t proto;
	56	/* TOS to match iff flags & IP6T_F_TOS */
	57	u_int8_t tos;
	58
	59	/* Flags word */
	60	u_int8_t flags;
	61	/* Inverse flags */
	62	u_int8_t invflags;
	63	};
	64
1e30a014 DM	65	#define ip6t_entry_match xt_entry_match
	66	#define ip6t_entry_target xt_entry_target
	67	#define ip6t_standard_target xt_standard_target
1da177e4	68
2e4e6a17	69	#define ip6t_counters xt_counters
1da177e4 LT	70
	71	/* Values for "flag" field in struct ip6t_ip6 (general ip6 structure). */
	72	#define IP6T_F_PROTO 0x01 /* Set if rule cares about upper
	73	protocols */
	74	#define IP6T_F_TOS 0x02 /* Match the TOS. */
05465343 PM	75	#define IP6T_F_GOTO 0x04 /* Set if jump is a goto */
05465343 PM	76	#define IP6T_F_MASK 0x07 /* All possible flag bits mask. */
1da177e4 LT	77
	78	/* Values for "inv" field in struct ip6t_ip6. */
	79	#define IP6T_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */
	80	#define IP6T_INV_VIA_OUT 0x02 /* Invert the sense of OUT IFACE */
	81	#define IP6T_INV_TOS 0x04 /* Invert the sense of TOS. */
	82	#define IP6T_INV_SRCIP 0x08 /* Invert the sense of SRC IP. */
	83	#define IP6T_INV_DSTIP 0x10 /* Invert the sense of DST OP. */
	84	#define IP6T_INV_FRAG 0x20 /* Invert the sense of FRAG. */
2e4e6a17	85	#define IP6T_INV_PROTO XT_INV_PROTO
1da177e4 LT	86	#define IP6T_INV_MASK 0x7F /* All possible flag bits mask. */
	87
	88	/* This structure defines each of the firewall rules. Consists of 3
	89	parts which are 1) general IP header stuff 2) match specific
	90	stuff 3) the target to perform if the rule matches */
	91	struct ip6t_entry
	92	{
	93	struct ip6t_ip6 ipv6;
	94
	95	/* Mark with fields that we care about. */
	96	unsigned int nfcache;
	97
	98	/* Size of ipt_entry + matches */
	99	u_int16_t target_offset;
	100	/* Size of ipt_entry + matches + target */
	101	u_int16_t next_offset;
	102
	103	/* Back pointer */
	104	unsigned int comefrom;
	105
	106	/* Packet and byte counters. */
2e4e6a17	107	struct xt_counters counters;
1da177e4 LT	108
	109	/* The matches (if any), then the target. */
	110	unsigned char elems[0];
	111	};
	112
9934e81c PM	113	/* Standard entry */
	114	struct ip6t_standard
	115	{
	116	struct ip6t_entry entry;
	117	struct ip6t_standard_target target;
	118	};
	119
	120	struct ip6t_error_target
	121	{
	122	struct ip6t_entry_target target;
	123	char errorname[IP6T_FUNCTION_MAXNAMELEN];
	124	};
	125
	126	struct ip6t_error
	127	{
	128	struct ip6t_entry entry;
	129	struct ip6t_error_target target;
	130	};
	131
3c2ad469 PM	132	#define IP6T_ENTRY_INIT(__size) \
	133	{ \
	134	.target_offset = sizeof(struct ip6t_entry), \
	135	.next_offset = (__size), \
	136	}
	137
	138	#define IP6T_STANDARD_INIT(__verdict) \
	139	{ \
	140	.entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)), \
	141	.target = XT_TARGET_INIT(IP6T_STANDARD_TARGET, \
	142	sizeof(struct ip6t_standard_target)), \
	143	.target.verdict = -(__verdict) - 1, \
	144	}
	145
	146	#define IP6T_ERROR_INIT \
	147	{ \
	148	.entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_error)), \
	149	.target = XT_TARGET_INIT(IP6T_ERROR_TARGET, \
	150	sizeof(struct ip6t_error_target)), \
	151	.target.errorname = "ERROR", \
	152	}
	153
1da177e4 LT	154	/*
	155	* New IP firewall options for [gs]etsockopt at the RAW IP level.
	156	* Unlike BSD Linux inherits IP options so you don't have to use
b96e7ecb YK	157	* a raw socket for this. Instead we check rights in the calls.
	158	*
	159	* ATTENTION: check linux/in6.h before adding new number here.
	160	*/
	161	#define IP6T_BASE_CTL 64
	162
	163	#define IP6T_SO_SET_REPLACE (IP6T_BASE_CTL)
	164	#define IP6T_SO_SET_ADD_COUNTERS (IP6T_BASE_CTL + 1)
	165	#define IP6T_SO_SET_MAX IP6T_SO_SET_ADD_COUNTERS
	166
	167	#define IP6T_SO_GET_INFO (IP6T_BASE_CTL)
	168	#define IP6T_SO_GET_ENTRIES (IP6T_BASE_CTL + 1)
	169	#define IP6T_SO_GET_REVISION_MATCH (IP6T_BASE_CTL + 4)
	170	#define IP6T_SO_GET_REVISION_TARGET (IP6T_BASE_CTL + 5)
	171	#define IP6T_SO_GET_MAX IP6T_SO_GET_REVISION_TARGET
1da177e4 LT	172
1da177e4 LT	173	/* CONTINUE verdict for targets */
2e4e6a17	174	#define IP6T_CONTINUE XT_CONTINUE
1da177e4 LT	175
1da177e4 LT	176	/* For standard target */
2e4e6a17	177	#define IP6T_RETURN XT_RETURN
1da177e4	178
2e4e6a17 HW	179	/* TCP/UDP matching stuff */
	180	#include <linux/netfilter/xt_tcpudp.h>
	181
	182	#define ip6t_tcp xt_tcp
	183	#define ip6t_udp xt_udp
1da177e4 LT	184
1da177e4 LT	185	/* Values for "inv" field in struct ipt_tcp. */
2e4e6a17 HW	186	#define IP6T_TCP_INV_SRCPT XT_TCP_INV_SRCPT
	187	#define IP6T_TCP_INV_DSTPT XT_TCP_INV_DSTPT
	188	#define IP6T_TCP_INV_FLAGS XT_TCP_INV_FLAGS
	189	#define IP6T_TCP_INV_OPTION XT_TCP_INV_OPTION
	190	#define IP6T_TCP_INV_MASK XT_TCP_INV_MASK
1da177e4 LT	191
1da177e4 LT	192	/* Values for "invflags" field in struct ipt_udp. */
2e4e6a17 HW	193	#define IP6T_UDP_INV_SRCPT XT_UDP_INV_SRCPT
	194	#define IP6T_UDP_INV_DSTPT XT_UDP_INV_DSTPT
	195	#define IP6T_UDP_INV_MASK XT_UDP_INV_MASK
1da177e4 LT	196
	197	/* ICMP matching stuff */
	198	struct ip6t_icmp
	199	{
	200	u_int8_t type; /* type to match */
	201	u_int8_t code[2]; /* range of code */
	202	u_int8_t invflags; /* Inverse flags */
	203	};
	204
	205	/* Values for "inv" field for struct ipt_icmp. */
	206	#define IP6T_ICMP_INV 0x01 /* Invert the sense of type/code test */
	207
	208	/* The argument to IP6T_SO_GET_INFO */
	209	struct ip6t_getinfo
	210	{
	211	/* Which table: caller fills this in. */
	212	char name[IP6T_TABLE_MAXNAMELEN];
	213
	214	/* Kernel fills these in. */
	215	/* Which hook entry points are valid: bitmask */
	216	unsigned int valid_hooks;
	217
	218	/* Hook entry points: one per netfilter hook. */
6e23ae2a	219	unsigned int hook_entry[NF_INET_NUMHOOKS];
1da177e4 LT	220
1da177e4 LT	221	/* Underflow points. */
6e23ae2a	222	unsigned int underflow[NF_INET_NUMHOOKS];
1da177e4 LT	223
	224	/* Number of entries */
	225	unsigned int num_entries;
	226
	227	/* Size of entries. */
	228	unsigned int size;
	229	};
	230
	231	/* The argument to IP6T_SO_SET_REPLACE. */
	232	struct ip6t_replace
	233	{
	234	/* Which table. */
	235	char name[IP6T_TABLE_MAXNAMELEN];
	236
	237	/* Which hook entry points are valid: bitmask. You can't
	238	change this. */
	239	unsigned int valid_hooks;
	240
	241	/* Number of entries */
	242	unsigned int num_entries;
	243
	244	/* Total size of new entries */
	245	unsigned int size;
	246
	247	/* Hook entry points. */
6e23ae2a	248	unsigned int hook_entry[NF_INET_NUMHOOKS];
1da177e4 LT	249
1da177e4 LT	250	/* Underflow points. */
6e23ae2a	251	unsigned int underflow[NF_INET_NUMHOOKS];
1da177e4 LT	252
	253	/* Information about old entries: */
	254	/* Number of counters (must be equal to current number of entries). */
	255	unsigned int num_counters;
	256	/* The old entries' counters. */
2e4e6a17	257	struct xt_counters __user *counters;
1da177e4 LT	258
	259	/* The entries (hang off end: not really an array). */
	260	struct ip6t_entry entries[0];
	261	};
	262
	263	/* The argument to IP6T_SO_ADD_COUNTERS. */
2e4e6a17	264	#define ip6t_counters_info xt_counters_info
1da177e4 LT	265
	266	/* The argument to IP6T_SO_GET_ENTRIES. */
	267	struct ip6t_get_entries
	268	{
	269	/* Which table: user fills this in. */
	270	char name[IP6T_TABLE_MAXNAMELEN];
	271
	272	/* User fills this in: total entry size. */
	273	unsigned int size;
	274
	275	/* The entries. */
	276	struct ip6t_entry entrytable[0];
	277	};
	278
	279	/* Standard return verdict, or do jump. */
2e4e6a17	280	#define IP6T_STANDARD_TARGET XT_STANDARD_TARGET
1da177e4	281	/* Error verdict. */
2e4e6a17	282	#define IP6T_ERROR_TARGET XT_ERROR_TARGET
1da177e4 LT	283
	284	/* Helper functions */
	285	static __inline__ struct ip6t_entry_target *
	286	ip6t_get_target(struct ip6t_entry *e)
	287	{
	288	return (void *)e + e->target_offset;
	289	}
	290
	291	/* fn returns 0 to continue iteration */
89c002d6 PM	292	#define IP6T_MATCH_ITERATE(e, fn, args...) \
89c002d6 PM	293	XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args)
1da177e4 LT	294
1da177e4 LT	295	/* fn returns 0 to continue iteration */
89c002d6 PM	296	#define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
89c002d6 PM	297	XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args)
1da177e4 LT	298
	299	/*
	300	* Main firewall chains definitions and global var's definitions.
	301	*/
	302
	303	#ifdef __KERNEL__
	304
	305	#include <linux/init.h>
	306	extern void ip6t_init(void) __init;
	307
336b517f	308	extern struct xt_table ip6t_register_table(struct net net,
35aad0ff	309	const struct xt_table *table,
44d34e72	310	const struct ip6t_replace *repl);
e60a13e0	311	extern void ip6t_unregister_table(struct xt_table *table);
3db05fea	312	extern unsigned int ip6t_do_table(struct sk_buff *skb,
1da177e4 LT	313	unsigned int hook,
	314	const struct net_device *in,
	315	const struct net_device *out,
e60a13e0	316	struct xt_table *table);
1da177e4 LT	317
	318	/* Check for an extension */
	319	extern int ip6t_ext_hdr(u8 nexthdr);
e674d0f3 YK	320	/* find specified header and get offset to it */
e674d0f3 YK	321	extern int ipv6_find_hdr(const struct sk_buff skb, unsigned int offset,
b777e0ce	322	int target, unsigned short *fragoff);
1da177e4	323
22dea562 PM	324	extern int ip6_masked_addrcmp(const struct in6_addr *addr1,
	325	const struct in6_addr *mask,
	326	const struct in6_addr *addr2);
	327
06e1374a	328	#define IP6T_ALIGN(s) XT_ALIGN(s)
1da177e4	329
3bc3fe5e PM	330	#ifdef CONFIG_COMPAT
	331	#include <net/compat.h>
	332
	333	struct compat_ip6t_entry
	334	{
	335	struct ip6t_ip6 ipv6;
	336	compat_uint_t nfcache;
	337	u_int16_t target_offset;
	338	u_int16_t next_offset;
	339	compat_uint_t comefrom;
	340	struct compat_xt_counters counters;
	341	unsigned char elems[0];
	342	};
	343
	344	static inline struct ip6t_entry_target *
	345	compat_ip6t_get_target(struct compat_ip6t_entry *e)
	346	{
	347	return (void *)e + e->target_offset;
	348	}
	349
	350	#define COMPAT_IP6T_ALIGN(s) COMPAT_XT_ALIGN(s)
	351
	352	/* fn returns 0 to continue iteration */
	353	#define COMPAT_IP6T_MATCH_ITERATE(e, fn, args...) \
	354	XT_MATCH_ITERATE(struct compat_ip6t_entry, e, fn, ## args)
	355
	356	/* fn returns 0 to continue iteration */
	357	#define COMPAT_IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
	358	XT_ENTRY_ITERATE(struct compat_ip6t_entry, entries, size, fn, ## args)
	359
	360	#define COMPAT_IP6T_ENTRY_ITERATE_CONTINUE(entries, size, n, fn, args...) \
	361	XT_ENTRY_ITERATE_CONTINUE(struct compat_ip6t_entry, entries, size, n, \
	362	fn, ## args)
	363
	364	#endif /* CONFIG_COMPAT */
1da177e4 LT	365	#endif /__KERNEL__/
1da177e4 LT	366	#endif /* _IP6_TABLES_H */