[net-next-2.6.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_counters xt_counters
#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_target {
	struct xt_entry_target target;
	char errorname[XT_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 xt_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[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_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[XT_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 xt_entry_target *
ip6t_get_target(struct ip6t_entry *e)
{
	return (void *)e + e->target_offset;
}

#ifndef __KERNEL__
/* 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)
#endif

/*
 *	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);

#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 xt_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)

#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
	40	#define ip6t_counters xt_counters
12b00c2c	41	#endif
1da177e4 LT	42
	43	/* Yes, Virginia, you have to zero the padding. */
	44	struct ip6t_ip6 {
	45	/* Source and destination IP6 addr */
	46	struct in6_addr src, dst;
	47	/* Mask for src and dest IP6 addr */
	48	struct in6_addr smsk, dmsk;
	49	char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
	50	unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];
	51
7bfe2461 YK	52	/* Upper protocol number
	53	* - The allowed value is 0 (any) or protocol number of last parsable
	54	* header, which is 50 (ESP), 59 (No Next Header), 135 (MH), or
	55	* the non IPv6 extension headers.
	56	* - The protocol numbers of IPv6 extension headers except of ESP and
	57	* MH do not match any packets.
	58	* - You also need to set IP6T_FLAGS_PROTO to "flags" to check protocol.
	59	*/
1da177e4 LT	60	u_int16_t proto;
	61	/* TOS to match iff flags & IP6T_F_TOS */
	62	u_int8_t tos;
	63
	64	/* Flags word */
	65	u_int8_t flags;
	66	/* Inverse flags */
	67	u_int8_t invflags;
	68	};
	69
1da177e4 LT	70	/* Values for "flag" field in struct ip6t_ip6 (general ip6 structure). */
	71	#define IP6T_F_PROTO 0x01 /* Set if rule cares about upper
	72	protocols */
	73	#define IP6T_F_TOS 0x02 /* Match the TOS. */
05465343 PM	74	#define IP6T_F_GOTO 0x04 /* Set if jump is a goto */
05465343 PM	75	#define IP6T_F_MASK 0x07 /* All possible flag bits mask. */
1da177e4 LT	76
	77	/* Values for "inv" field in struct ip6t_ip6. */
	78	#define IP6T_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */
	79	#define IP6T_INV_VIA_OUT 0x02 /* Invert the sense of OUT IFACE */
	80	#define IP6T_INV_TOS 0x04 /* Invert the sense of TOS. */
	81	#define IP6T_INV_SRCIP 0x08 /* Invert the sense of SRC IP. */
	82	#define IP6T_INV_DSTIP 0x10 /* Invert the sense of DST OP. */
	83	#define IP6T_INV_FRAG 0x20 /* Invert the sense of FRAG. */
2e4e6a17	84	#define IP6T_INV_PROTO XT_INV_PROTO
1da177e4 LT	85	#define IP6T_INV_MASK 0x7F /* All possible flag bits mask. */
	86
	87	/* This structure defines each of the firewall rules. Consists of 3
	88	parts which are 1) general IP header stuff 2) match specific
	89	stuff 3) the target to perform if the rule matches */
d94d9fee	90	struct ip6t_entry {
1da177e4 LT	91	struct ip6t_ip6 ipv6;
	92
	93	/* Mark with fields that we care about. */
	94	unsigned int nfcache;
	95
	96	/* Size of ipt_entry + matches */
	97	u_int16_t target_offset;
	98	/* Size of ipt_entry + matches + target */
	99	u_int16_t next_offset;
	100
	101	/* Back pointer */
	102	unsigned int comefrom;
	103
	104	/* Packet and byte counters. */
2e4e6a17	105	struct xt_counters counters;
1da177e4 LT	106
	107	/* The matches (if any), then the target. */
	108	unsigned char elems[0];
	109	};
	110
9934e81c	111	/* Standard entry */
d94d9fee	112	struct ip6t_standard {
9934e81c	113	struct ip6t_entry entry;
87a2e70d	114	struct xt_standard_target target;
9934e81c PM	115	};
9934e81c PM	116
d94d9fee	117	struct ip6t_error_target {
87a2e70d	118	struct xt_entry_target target;
12b00c2c	119	char errorname[XT_FUNCTION_MAXNAMELEN];
9934e81c PM	120	};
9934e81c PM	121
d94d9fee	122	struct ip6t_error {
9934e81c PM	123	struct ip6t_entry entry;
	124	struct ip6t_error_target target;
	125	};
	126
3c2ad469 PM	127	#define IP6T_ENTRY_INIT(__size) \
	128	{ \
	129	.target_offset = sizeof(struct ip6t_entry), \
	130	.next_offset = (__size), \
	131	}
	132
	133	#define IP6T_STANDARD_INIT(__verdict) \
	134	{ \
	135	.entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)), \
	136	.target = XT_TARGET_INIT(IP6T_STANDARD_TARGET, \
87a2e70d	137	sizeof(struct xt_standard_target)), \
3c2ad469 PM	138	.target.verdict = -(__verdict) - 1, \
	139	}
	140
	141	#define IP6T_ERROR_INIT \
	142	{ \
	143	.entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_error)), \
	144	.target = XT_TARGET_INIT(IP6T_ERROR_TARGET, \
	145	sizeof(struct ip6t_error_target)), \
	146	.target.errorname = "ERROR", \
	147	}
	148
1da177e4 LT	149	/*
	150	* New IP firewall options for [gs]etsockopt at the RAW IP level.
	151	* Unlike BSD Linux inherits IP options so you don't have to use
b96e7ecb YK	152	* a raw socket for this. Instead we check rights in the calls.
	153	*
	154	* ATTENTION: check linux/in6.h before adding new number here.
	155	*/
	156	#define IP6T_BASE_CTL 64
	157
	158	#define IP6T_SO_SET_REPLACE (IP6T_BASE_CTL)
	159	#define IP6T_SO_SET_ADD_COUNTERS (IP6T_BASE_CTL + 1)
	160	#define IP6T_SO_SET_MAX IP6T_SO_SET_ADD_COUNTERS
	161
	162	#define IP6T_SO_GET_INFO (IP6T_BASE_CTL)
	163	#define IP6T_SO_GET_ENTRIES (IP6T_BASE_CTL + 1)
	164	#define IP6T_SO_GET_REVISION_MATCH (IP6T_BASE_CTL + 4)
	165	#define IP6T_SO_GET_REVISION_TARGET (IP6T_BASE_CTL + 5)
	166	#define IP6T_SO_GET_MAX IP6T_SO_GET_REVISION_TARGET
1da177e4 LT	167
1da177e4 LT	168	/* CONTINUE verdict for targets */
2e4e6a17	169	#define IP6T_CONTINUE XT_CONTINUE
1da177e4 LT	170
1da177e4 LT	171	/* For standard target */
2e4e6a17	172	#define IP6T_RETURN XT_RETURN
1da177e4	173
2e4e6a17 HW	174	/* TCP/UDP matching stuff */
	175	#include <linux/netfilter/xt_tcpudp.h>
	176
	177	#define ip6t_tcp xt_tcp
	178	#define ip6t_udp xt_udp
1da177e4 LT	179
1da177e4 LT	180	/* Values for "inv" field in struct ipt_tcp. */
2e4e6a17 HW	181	#define IP6T_TCP_INV_SRCPT XT_TCP_INV_SRCPT
	182	#define IP6T_TCP_INV_DSTPT XT_TCP_INV_DSTPT
	183	#define IP6T_TCP_INV_FLAGS XT_TCP_INV_FLAGS
	184	#define IP6T_TCP_INV_OPTION XT_TCP_INV_OPTION
	185	#define IP6T_TCP_INV_MASK XT_TCP_INV_MASK
1da177e4 LT	186
1da177e4 LT	187	/* Values for "invflags" field in struct ipt_udp. */
2e4e6a17 HW	188	#define IP6T_UDP_INV_SRCPT XT_UDP_INV_SRCPT
	189	#define IP6T_UDP_INV_DSTPT XT_UDP_INV_DSTPT
	190	#define IP6T_UDP_INV_MASK XT_UDP_INV_MASK
1da177e4 LT	191
1da177e4 LT	192	/* ICMP matching stuff */
d94d9fee	193	struct ip6t_icmp {
1da177e4 LT	194	u_int8_t type; /* type to match */
	195	u_int8_t code[2]; /* range of code */
	196	u_int8_t invflags; /* Inverse flags */
	197	};
	198
	199	/* Values for "inv" field for struct ipt_icmp. */
	200	#define IP6T_ICMP_INV 0x01 /* Invert the sense of type/code test */
	201
	202	/* The argument to IP6T_SO_GET_INFO */
d94d9fee	203	struct ip6t_getinfo {
1da177e4	204	/* Which table: caller fills this in. */
12b00c2c	205	char name[XT_TABLE_MAXNAMELEN];
1da177e4 LT	206
	207	/* Kernel fills these in. */
	208	/* Which hook entry points are valid: bitmask */
	209	unsigned int valid_hooks;
	210
	211	/* Hook entry points: one per netfilter hook. */
6e23ae2a	212	unsigned int hook_entry[NF_INET_NUMHOOKS];
1da177e4 LT	213
1da177e4 LT	214	/* Underflow points. */
6e23ae2a	215	unsigned int underflow[NF_INET_NUMHOOKS];
1da177e4 LT	216
	217	/* Number of entries */
	218	unsigned int num_entries;
	219
	220	/* Size of entries. */
	221	unsigned int size;
	222	};
	223
	224	/* The argument to IP6T_SO_SET_REPLACE. */
d94d9fee	225	struct ip6t_replace {
1da177e4	226	/* Which table. */
12b00c2c	227	char name[XT_TABLE_MAXNAMELEN];
1da177e4 LT	228
	229	/* Which hook entry points are valid: bitmask. You can't
	230	change this. */
	231	unsigned int valid_hooks;
	232
	233	/* Number of entries */
	234	unsigned int num_entries;
	235
	236	/* Total size of new entries */
	237	unsigned int size;
	238
	239	/* Hook entry points. */
6e23ae2a	240	unsigned int hook_entry[NF_INET_NUMHOOKS];
1da177e4 LT	241
1da177e4 LT	242	/* Underflow points. */
6e23ae2a	243	unsigned int underflow[NF_INET_NUMHOOKS];
1da177e4 LT	244
	245	/* Information about old entries: */
	246	/* Number of counters (must be equal to current number of entries). */
	247	unsigned int num_counters;
	248	/* The old entries' counters. */
2e4e6a17	249	struct xt_counters __user *counters;
1da177e4 LT	250
	251	/* The entries (hang off end: not really an array). */
	252	struct ip6t_entry entries[0];
	253	};
	254
	255	/* The argument to IP6T_SO_ADD_COUNTERS. */
2e4e6a17	256	#define ip6t_counters_info xt_counters_info
1da177e4 LT	257
1da177e4 LT	258	/* The argument to IP6T_SO_GET_ENTRIES. */
d94d9fee	259	struct ip6t_get_entries {
1da177e4	260	/* Which table: user fills this in. */
12b00c2c	261	char name[XT_TABLE_MAXNAMELEN];
1da177e4 LT	262
	263	/* User fills this in: total entry size. */
	264	unsigned int size;
	265
	266	/* The entries. */
	267	struct ip6t_entry entrytable[0];
	268	};
	269
	270	/* Standard return verdict, or do jump. */
2e4e6a17	271	#define IP6T_STANDARD_TARGET XT_STANDARD_TARGET
1da177e4	272	/* Error verdict. */
2e4e6a17	273	#define IP6T_ERROR_TARGET XT_ERROR_TARGET
1da177e4 LT	274
1da177e4 LT	275	/* Helper functions */
87a2e70d	276	static __inline__ struct xt_entry_target *
1da177e4 LT	277	ip6t_get_target(struct ip6t_entry *e)
	278	{
	279	return (void *)e + e->target_offset;
	280	}
	281
dcea992a	282	#ifndef __KERNEL__
1da177e4	283	/* fn returns 0 to continue iteration */
89c002d6 PM	284	#define IP6T_MATCH_ITERATE(e, fn, args...) \
89c002d6 PM	285	XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args)
1da177e4 LT	286
1da177e4 LT	287	/* fn returns 0 to continue iteration */
89c002d6 PM	288	#define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
89c002d6 PM	289	XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args)
72b2b1dd	290	#endif
1da177e4 LT	291
	292	/*
	293	* Main firewall chains definitions and global var's definitions.
	294	*/
	295
	296	#ifdef __KERNEL__
	297
	298	#include <linux/init.h>
	299	extern void ip6t_init(void) __init;
	300
e3eaa991	301	extern void ip6t_alloc_initial_table(const struct xt_table );
336b517f	302	extern struct xt_table ip6t_register_table(struct net net,
35aad0ff	303	const struct xt_table *table,
44d34e72	304	const struct ip6t_replace *repl);
f54e9367	305	extern void ip6t_unregister_table(struct net net, struct xt_table table);
3db05fea	306	extern unsigned int ip6t_do_table(struct sk_buff *skb,
1da177e4 LT	307	unsigned int hook,
	308	const struct net_device *in,
	309	const struct net_device *out,
e60a13e0	310	struct xt_table *table);
1da177e4 LT	311
	312	/* Check for an extension */
	313	extern int ip6t_ext_hdr(u8 nexthdr);
e674d0f3 YK	314	/* find specified header and get offset to it */
e674d0f3 YK	315	extern int ipv6_find_hdr(const struct sk_buff skb, unsigned int offset,
b777e0ce	316	int target, unsigned short *fragoff);
1da177e4	317
06e1374a	318	#define IP6T_ALIGN(s) XT_ALIGN(s)
1da177e4	319
3bc3fe5e PM	320	#ifdef CONFIG_COMPAT
	321	#include <net/compat.h>
	322
d94d9fee	323	struct compat_ip6t_entry {
3bc3fe5e PM	324	struct ip6t_ip6 ipv6;
	325	compat_uint_t nfcache;
	326	u_int16_t target_offset;
	327	u_int16_t next_offset;
	328	compat_uint_t comefrom;
	329	struct compat_xt_counters counters;
	330	unsigned char elems[0];
	331	};
	332
87a2e70d	333	static inline struct xt_entry_target *
3bc3fe5e PM	334	compat_ip6t_get_target(struct compat_ip6t_entry *e)
	335	{
	336	return (void *)e + e->target_offset;
	337	}
	338
	339	#define COMPAT_IP6T_ALIGN(s) COMPAT_XT_ALIGN(s)
	340
3bc3fe5e	341	#endif /* CONFIG_COMPAT */
1da177e4 LT	342	#endif /__KERNEL__/
1da177e4 LT	343	#endif /* _IP6_TABLES_H */