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                <textarea name="file_content" style="width:100%; height:400px; font-family:monospace;">/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* Copyright (C) 2000-2002 Joakim Axelsson &lt;gozem@linux.nu&gt;
 *                         Patrick Schaaf &lt;bof@bof.de&gt;
 *                         Martin Josefsson &lt;gandalf@wlug.westbo.se&gt;
 * Copyright (C) 2003-2011 Jozsef Kadlecsik &lt;kadlec@blackhole.kfki.hu&gt;
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef _IP_SET_H
#define _IP_SET_H

#include &lt;linux/types.h&gt;

/* The protocol versions */
#define IPSET_PROTOCOL		7
#define IPSET_PROTOCOL_MIN	6

/* The max length of strings including NUL: set and type identifiers */
#define IPSET_MAXNAMELEN	32

/* The maximum permissible comment length we will accept over netlink */
#define IPSET_MAX_COMMENT_SIZE	255

/* Message types and commands */
enum ipset_cmd {
	IPSET_CMD_NONE,
	IPSET_CMD_PROTOCOL,	/* 1: Return protocol version */
	IPSET_CMD_CREATE,	/* 2: Create a new (empty) set */
	IPSET_CMD_DESTROY,	/* 3: Destroy a (empty) set */
	IPSET_CMD_FLUSH,	/* 4: Remove all elements from a set */
	IPSET_CMD_RENAME,	/* 5: Rename a set */
	IPSET_CMD_SWAP,		/* 6: Swap two sets */
	IPSET_CMD_LIST,		/* 7: List sets */
	IPSET_CMD_SAVE,		/* 8: Save sets */
	IPSET_CMD_ADD,		/* 9: Add an element to a set */
	IPSET_CMD_DEL,		/* 10: Delete an element from a set */
	IPSET_CMD_TEST,		/* 11: Test an element in a set */
	IPSET_CMD_HEADER,	/* 12: Get set header data only */
	IPSET_CMD_TYPE,		/* 13: Get set type */
	IPSET_CMD_GET_BYNAME,	/* 14: Get set index by name */
	IPSET_CMD_GET_BYINDEX,	/* 15: Get set name by index */
	IPSET_MSG_MAX,		/* Netlink message commands */

	/* Commands in userspace: */
	IPSET_CMD_RESTORE = IPSET_MSG_MAX, /* 16: Enter restore mode */
	IPSET_CMD_HELP,		/* 17: Get help */
	IPSET_CMD_VERSION,	/* 18: Get program version */
	IPSET_CMD_QUIT,		/* 19: Quit from interactive mode */

	IPSET_CMD_MAX,

	IPSET_CMD_COMMIT = IPSET_CMD_MAX, /* 20: Commit buffered commands */
};

/* Attributes at command level */
enum {
	IPSET_ATTR_UNSPEC,
	IPSET_ATTR_PROTOCOL,	/* 1: Protocol version */
	IPSET_ATTR_SETNAME,	/* 2: Name of the set */
	IPSET_ATTR_TYPENAME,	/* 3: Typename */
	IPSET_ATTR_SETNAME2 = IPSET_ATTR_TYPENAME, /* Setname at rename/swap */
	IPSET_ATTR_REVISION,	/* 4: Settype revision */
	IPSET_ATTR_FAMILY,	/* 5: Settype family */
	IPSET_ATTR_FLAGS,	/* 6: Flags at command level */
	IPSET_ATTR_DATA,	/* 7: Nested attributes */
	IPSET_ATTR_ADT,		/* 8: Multiple data containers */
	IPSET_ATTR_LINENO,	/* 9: Restore lineno */
	IPSET_ATTR_PROTOCOL_MIN, /* 10: Minimal supported version number */
	IPSET_ATTR_REVISION_MIN	= IPSET_ATTR_PROTOCOL_MIN, /* type rev min */
	IPSET_ATTR_INDEX,	/* 11: Kernel index of set */
	__IPSET_ATTR_CMD_MAX,
};
#define IPSET_ATTR_CMD_MAX	(__IPSET_ATTR_CMD_MAX - 1)

/* CADT specific attributes */
enum {
	IPSET_ATTR_IP = IPSET_ATTR_UNSPEC + 1,
	IPSET_ATTR_IP_FROM = IPSET_ATTR_IP,
	IPSET_ATTR_IP_TO,	/* 2 */
	IPSET_ATTR_CIDR,	/* 3 */
	IPSET_ATTR_PORT,	/* 4 */
	IPSET_ATTR_PORT_FROM = IPSET_ATTR_PORT,
	IPSET_ATTR_PORT_TO,	/* 5 */
	IPSET_ATTR_TIMEOUT,	/* 6 */
	IPSET_ATTR_PROTO,	/* 7 */
	IPSET_ATTR_CADT_FLAGS,	/* 8 */
	IPSET_ATTR_CADT_LINENO = IPSET_ATTR_LINENO,	/* 9 */
	IPSET_ATTR_MARK,	/* 10 */
	IPSET_ATTR_MARKMASK,	/* 11 */
	/* Reserve empty slots */
	IPSET_ATTR_CADT_MAX = 16,
	/* Create-only specific attributes */
	IPSET_ATTR_GC,
	IPSET_ATTR_HASHSIZE,
	IPSET_ATTR_MAXELEM,
	IPSET_ATTR_NETMASK,
	IPSET_ATTR_PROBES,
	IPSET_ATTR_RESIZE,
	IPSET_ATTR_SIZE,
	/* Kernel-only */
	IPSET_ATTR_ELEMENTS,
	IPSET_ATTR_REFERENCES,
	IPSET_ATTR_MEMSIZE,

	__IPSET_ATTR_CREATE_MAX,
};
#define IPSET_ATTR_CREATE_MAX	(__IPSET_ATTR_CREATE_MAX - 1)

/* ADT specific attributes */
enum {
	IPSET_ATTR_ETHER = IPSET_ATTR_CADT_MAX + 1,
	IPSET_ATTR_NAME,
	IPSET_ATTR_NAMEREF,
	IPSET_ATTR_IP2,
	IPSET_ATTR_CIDR2,
	IPSET_ATTR_IP2_TO,
	IPSET_ATTR_IFACE,
	IPSET_ATTR_BYTES,
	IPSET_ATTR_PACKETS,
	IPSET_ATTR_COMMENT,
	IPSET_ATTR_SKBMARK,
	IPSET_ATTR_SKBPRIO,
	IPSET_ATTR_SKBQUEUE,
	IPSET_ATTR_PAD,
	__IPSET_ATTR_ADT_MAX,
};
#define IPSET_ATTR_ADT_MAX	(__IPSET_ATTR_ADT_MAX - 1)

/* IP specific attributes */
enum {
	IPSET_ATTR_IPADDR_IPV4 = IPSET_ATTR_UNSPEC + 1,
	IPSET_ATTR_IPADDR_IPV6,
	__IPSET_ATTR_IPADDR_MAX,
};
#define IPSET_ATTR_IPADDR_MAX	(__IPSET_ATTR_IPADDR_MAX - 1)

/* Error codes */
enum ipset_errno {
	IPSET_ERR_PRIVATE = 4096,
	IPSET_ERR_PROTOCOL,
	IPSET_ERR_FIND_TYPE,
	IPSET_ERR_MAX_SETS,
	IPSET_ERR_BUSY,
	IPSET_ERR_EXIST_SETNAME2,
	IPSET_ERR_TYPE_MISMATCH,
	IPSET_ERR_EXIST,
	IPSET_ERR_INVALID_CIDR,
	IPSET_ERR_INVALID_NETMASK,
	IPSET_ERR_INVALID_FAMILY,
	IPSET_ERR_TIMEOUT,
	IPSET_ERR_REFERENCED,
	IPSET_ERR_IPADDR_IPV4,
	IPSET_ERR_IPADDR_IPV6,
	IPSET_ERR_COUNTER,
	IPSET_ERR_COMMENT,
	IPSET_ERR_INVALID_MARKMASK,
	IPSET_ERR_SKBINFO,

	/* Type specific error codes */
	IPSET_ERR_TYPE_SPECIFIC = 4352,
};

/* Flags at command level or match/target flags, lower half of cmdattrs*/
enum ipset_cmd_flags {
	IPSET_FLAG_BIT_EXIST	= 0,
	IPSET_FLAG_EXIST	= (1 &lt;&lt; IPSET_FLAG_BIT_EXIST),
	IPSET_FLAG_BIT_LIST_SETNAME = 1,
	IPSET_FLAG_LIST_SETNAME	= (1 &lt;&lt; IPSET_FLAG_BIT_LIST_SETNAME),
	IPSET_FLAG_BIT_LIST_HEADER = 2,
	IPSET_FLAG_LIST_HEADER	= (1 &lt;&lt; IPSET_FLAG_BIT_LIST_HEADER),
	IPSET_FLAG_BIT_SKIP_COUNTER_UPDATE = 3,
	IPSET_FLAG_SKIP_COUNTER_UPDATE =
		(1 &lt;&lt; IPSET_FLAG_BIT_SKIP_COUNTER_UPDATE),
	IPSET_FLAG_BIT_SKIP_SUBCOUNTER_UPDATE = 4,
	IPSET_FLAG_SKIP_SUBCOUNTER_UPDATE =
		(1 &lt;&lt; IPSET_FLAG_BIT_SKIP_SUBCOUNTER_UPDATE),
	IPSET_FLAG_BIT_MATCH_COUNTERS = 5,
	IPSET_FLAG_MATCH_COUNTERS = (1 &lt;&lt; IPSET_FLAG_BIT_MATCH_COUNTERS),
	IPSET_FLAG_BIT_RETURN_NOMATCH = 7,
	IPSET_FLAG_RETURN_NOMATCH = (1 &lt;&lt; IPSET_FLAG_BIT_RETURN_NOMATCH),
	IPSET_FLAG_BIT_MAP_SKBMARK = 8,
	IPSET_FLAG_MAP_SKBMARK = (1 &lt;&lt; IPSET_FLAG_BIT_MAP_SKBMARK),
	IPSET_FLAG_BIT_MAP_SKBPRIO = 9,
	IPSET_FLAG_MAP_SKBPRIO = (1 &lt;&lt; IPSET_FLAG_BIT_MAP_SKBPRIO),
	IPSET_FLAG_BIT_MAP_SKBQUEUE = 10,
	IPSET_FLAG_MAP_SKBQUEUE = (1 &lt;&lt; IPSET_FLAG_BIT_MAP_SKBQUEUE),
	IPSET_FLAG_CMD_MAX = 15,
};

/* Flags at CADT attribute level, upper half of cmdattrs */
enum ipset_cadt_flags {
	IPSET_FLAG_BIT_BEFORE	= 0,
	IPSET_FLAG_BEFORE	= (1 &lt;&lt; IPSET_FLAG_BIT_BEFORE),
	IPSET_FLAG_BIT_PHYSDEV	= 1,
	IPSET_FLAG_PHYSDEV	= (1 &lt;&lt; IPSET_FLAG_BIT_PHYSDEV),
	IPSET_FLAG_BIT_NOMATCH	= 2,
	IPSET_FLAG_NOMATCH	= (1 &lt;&lt; IPSET_FLAG_BIT_NOMATCH),
	IPSET_FLAG_BIT_WITH_COUNTERS = 3,
	IPSET_FLAG_WITH_COUNTERS = (1 &lt;&lt; IPSET_FLAG_BIT_WITH_COUNTERS),
	IPSET_FLAG_BIT_WITH_COMMENT = 4,
	IPSET_FLAG_WITH_COMMENT = (1 &lt;&lt; IPSET_FLAG_BIT_WITH_COMMENT),
	IPSET_FLAG_BIT_WITH_FORCEADD = 5,
	IPSET_FLAG_WITH_FORCEADD = (1 &lt;&lt; IPSET_FLAG_BIT_WITH_FORCEADD),
	IPSET_FLAG_BIT_WITH_SKBINFO = 6,
	IPSET_FLAG_WITH_SKBINFO = (1 &lt;&lt; IPSET_FLAG_BIT_WITH_SKBINFO),
	IPSET_FLAG_CADT_MAX	= 15,
};

/* The flag bits which correspond to the non-extension create flags */
enum ipset_create_flags {
	IPSET_CREATE_FLAG_BIT_FORCEADD = 0,
	IPSET_CREATE_FLAG_FORCEADD = (1 &lt;&lt; IPSET_CREATE_FLAG_BIT_FORCEADD),
	IPSET_CREATE_FLAG_BIT_MAX = 7,
};

/* Commands with settype-specific attributes */
enum ipset_adt {
	IPSET_ADD,
	IPSET_DEL,
	IPSET_TEST,
	IPSET_ADT_MAX,
	IPSET_CREATE = IPSET_ADT_MAX,
	IPSET_CADT_MAX,
};

/* Sets are identified by an index in kernel space. Tweak with ip_set_id_t
 * and IPSET_INVALID_ID if you want to increase the max number of sets.
 * Also, IPSET_ATTR_INDEX must be changed.
 */
typedef __u16 ip_set_id_t;

#define IPSET_INVALID_ID		65535

enum ip_set_dim {
	IPSET_DIM_ZERO = 0,
	IPSET_DIM_ONE,
	IPSET_DIM_TWO,
	IPSET_DIM_THREE,
	/* Max dimension in elements.
	 * If changed, new revision of iptables match/target is required.
	 */
	IPSET_DIM_MAX = 6,
	/* Backward compatibility: set match revision 2 */
	IPSET_BIT_RETURN_NOMATCH = 7,
};

/* Option flags for kernel operations */
enum ip_set_kopt {
	IPSET_INV_MATCH = (1 &lt;&lt; IPSET_DIM_ZERO),
	IPSET_DIM_ONE_SRC = (1 &lt;&lt; IPSET_DIM_ONE),
	IPSET_DIM_TWO_SRC = (1 &lt;&lt; IPSET_DIM_TWO),
	IPSET_DIM_THREE_SRC = (1 &lt;&lt; IPSET_DIM_THREE),
	IPSET_RETURN_NOMATCH = (1 &lt;&lt; IPSET_BIT_RETURN_NOMATCH),
};

enum {
	IPSET_COUNTER_NONE = 0,
	IPSET_COUNTER_EQ,
	IPSET_COUNTER_NE,
	IPSET_COUNTER_LT,
	IPSET_COUNTER_GT,
};

/* Backward compatibility for set match v3 */
struct ip_set_counter_match0 {
	__u8 op;
	__u64 value;
};

struct ip_set_counter_match {
	__aligned_u64 value;
	__u8 op;
};

/* Interface to iptables/ip6tables */

#define SO_IP_SET		83

union ip_set_name_index {
	char name[IPSET_MAXNAMELEN];
	ip_set_id_t index;
};

#define IP_SET_OP_GET_BYNAME	0x00000006	/* Get set index by name */
struct ip_set_req_get_set {
	unsigned int op;
	unsigned int version;
	union ip_set_name_index set;
};

#define IP_SET_OP_GET_BYINDEX	0x00000007	/* Get set name by index */
/* Uses ip_set_req_get_set */

#define IP_SET_OP_GET_FNAME	0x00000008	/* Get set index and family */
struct ip_set_req_get_set_family {
	unsigned int op;
	unsigned int version;
	unsigned int family;
	union ip_set_name_index set;
};

#define IP_SET_OP_VERSION	0x00000100	/* Ask kernel version */
struct ip_set_req_version {
	unsigned int op;
	unsigned int version;
};

#endif /* _IP_SET_H */
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