include/linux/netfilter_ipv6/ip6_tables.h - manifest_repos/iptables - Git at Google

 /*
  * 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

 #include <linux/types.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 *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.
  */

 #endif /* _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

	#include <linux/types.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 *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.
	*/

	#endif /* _IP6_TABLES_H */