include/uapi/linux/netfilter_ipv4/ip_tables.h - arm/linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  * 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 _UAPI_IPTABLES_H
 #define _UAPI_IPTABLES_H

 #include <linux/types.h>
 #include <linux/compiler.h>
 #include <linux/if.h>
 #include <linux/netfilter_ipv4.h>

 #include <linux/netfilter/x_tables.h>

 #ifndef __KERNEL__
 #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
 #define ipt_entry_match xt_entry_match
 #define ipt_entry_target xt_entry_target
 #define ipt_standard_target xt_standard_target
 #define ipt_error_target xt_error_target
 #define ipt_counters xt_counters
 #define IPT_CONTINUE XT_CONTINUE
 #define IPT_RETURN XT_RETURN

 /* This group is older than old (iptables < v1.4.0-rc1~89) */
 #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

 /* The argument to IPT_SO_ADD_COUNTERS. */
 #define ipt_counters_info xt_counters_info
 /* Standard return verdict, or do jump. */
 #define IPT_STANDARD_TARGET XT_STANDARD_TARGET
 /* Error verdict. */
 #define IPT_ERROR_TARGET XT_ERROR_TARGET

 /* 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

 /* 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 */
 	__u16 proto;

 	/* Flags word */
 	__u8 flags;
 	/* Inverse flags */
 	__u8 invflags;
 };

 /* 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 */
 	__u16 target_offset;
 	/* Size of ipt_entry + matches + target */
 	__u16 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

 /* ICMP matching stuff */
 struct ipt_icmp {
 	__u8 type;				/* type to match */
 	__u8 code[2];				/* range of code */
 	__u8 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[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 IPT_SO_SET_REPLACE. */
 struct ipt_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 ipt_entry entries[0];
 };

 /* The argument to IPT_SO_GET_ENTRIES. */
 struct ipt_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 ipt_entry entrytable[0];
 };

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

 /*
  *	Main firewall chains definitions and global var's definitions.
  */
 #endif /* _UAPI_IPTABLES_H */
	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
	/*
	* 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 _UAPI_IPTABLES_H
	#define _UAPI_IPTABLES_H

	#include <linux/types.h>
	#include <linux/compiler.h>
	#include <linux/if.h>
	#include <linux/netfilter_ipv4.h>

	#include <linux/netfilter/x_tables.h>

	#ifndef __KERNEL__
	#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
	#define ipt_entry_match xt_entry_match
	#define ipt_entry_target xt_entry_target
	#define ipt_standard_target xt_standard_target
	#define ipt_error_target xt_error_target
	#define ipt_counters xt_counters
	#define IPT_CONTINUE XT_CONTINUE
	#define IPT_RETURN XT_RETURN

	/* This group is older than old (iptables < v1.4.0-rc1~89) */
	#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

	/* The argument to IPT_SO_ADD_COUNTERS. */
	#define ipt_counters_info xt_counters_info
	/* Standard return verdict, or do jump. */
	#define IPT_STANDARD_TARGET XT_STANDARD_TARGET
	/* Error verdict. */
	#define IPT_ERROR_TARGET XT_ERROR_TARGET

	/* 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

	/* 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 */
	__u16 proto;

	/* Flags word */
	__u8 flags;
	/* Inverse flags */
	__u8 invflags;
	};

	/* 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 */
	__u16 target_offset;
	/* Size of ipt_entry + matches + target */
	__u16 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

	/* ICMP matching stuff */
	struct ipt_icmp {
	__u8 type; /* type to match */
	__u8 code[2]; /* range of code */
	__u8 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[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 IPT_SO_SET_REPLACE. */
	struct ipt_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 ipt_entry entries[0];
	};

	/* The argument to IPT_SO_GET_ENTRIES. */
	struct ipt_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 ipt_entry entrytable[0];
	};

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

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