/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* 25-Jul-1998 Major changes to allow for ip chain table
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*
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* 3-Jan-2000 Named tables to allow packet selection for different uses.
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*/
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/*
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* Format of an IP6 firewall descriptor
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*
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* src, dst, src_mask, dst_mask are always stored in network byte order.
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* flags are stored in host byte order (of course).
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* Port numbers are stored in HOST byte order.
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*/
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#ifndef _UAPI_IP6_TABLES_H
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#define _UAPI_IP6_TABLES_H
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#include <linux/types.h>
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#include <linux/compiler.h>
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#include <linux/if.h>
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#include <linux/netfilter_ipv6.h>
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#include <linux/netfilter/x_tables.h>
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#ifndef __KERNEL__
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#define IP6T_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
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#define IP6T_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
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#define ip6t_match xt_match
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#define ip6t_target xt_target
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#define ip6t_table xt_table
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#define ip6t_get_revision xt_get_revision
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#define ip6t_entry_match xt_entry_match
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#define ip6t_entry_target xt_entry_target
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#define ip6t_standard_target xt_standard_target
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#define ip6t_error_target xt_error_target
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#define ip6t_counters xt_counters
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#define IP6T_CONTINUE XT_CONTINUE
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#define IP6T_RETURN XT_RETURN
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/* Pre-iptables-1.4.0 */
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#include <linux/netfilter/xt_tcpudp.h>
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#define ip6t_tcp xt_tcp
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#define ip6t_udp xt_udp
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#define IP6T_TCP_INV_SRCPT XT_TCP_INV_SRCPT
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#define IP6T_TCP_INV_DSTPT XT_TCP_INV_DSTPT
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#define IP6T_TCP_INV_FLAGS XT_TCP_INV_FLAGS
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#define IP6T_TCP_INV_OPTION XT_TCP_INV_OPTION
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#define IP6T_TCP_INV_MASK XT_TCP_INV_MASK
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#define IP6T_UDP_INV_SRCPT XT_UDP_INV_SRCPT
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#define IP6T_UDP_INV_DSTPT XT_UDP_INV_DSTPT
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#define IP6T_UDP_INV_MASK XT_UDP_INV_MASK
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#define ip6t_counters_info xt_counters_info
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#define IP6T_STANDARD_TARGET XT_STANDARD_TARGET
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#define IP6T_ERROR_TARGET XT_ERROR_TARGET
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#define IP6T_MATCH_ITERATE(e, fn, args...) \
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XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args)
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#define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
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XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args)
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#endif
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/* Yes, Virginia, you have to zero the padding. */
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struct ip6t_ip6 {
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/* Source and destination IP6 addr */
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struct in6_addr src, dst;
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/* Mask for src and dest IP6 addr */
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struct in6_addr smsk, dmsk;
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char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
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unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];
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/* Upper protocol number
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* - The allowed value is 0 (any) or protocol number of last parsable
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* header, which is 50 (ESP), 59 (No Next Header), 135 (MH), or
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* the non IPv6 extension headers.
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* - The protocol numbers of IPv6 extension headers except of ESP and
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* MH do not match any packets.
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* - You also need to set IP6T_FLAGS_PROTO to "flags" to check protocol.
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*/
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__u16 proto;
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/* TOS to match iff flags & IP6T_F_TOS */
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__u8 tos;
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/* Flags word */
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__u8 flags;
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/* Inverse flags */
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__u8 invflags;
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};
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/* Values for "flag" field in struct ip6t_ip6 (general ip6 structure). */
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#define IP6T_F_PROTO 0x01 /* Set if rule cares about upper
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protocols */
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#define IP6T_F_TOS 0x02 /* Match the TOS. */
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#define IP6T_F_GOTO 0x04 /* Set if jump is a goto */
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#define IP6T_F_MASK 0x07 /* All possible flag bits mask. */
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/* Values for "inv" field in struct ip6t_ip6. */
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#define IP6T_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */
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#define IP6T_INV_VIA_OUT 0x02 /* Invert the sense of OUT IFACE */
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#define IP6T_INV_TOS 0x04 /* Invert the sense of TOS. */
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#define IP6T_INV_SRCIP 0x08 /* Invert the sense of SRC IP. */
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#define IP6T_INV_DSTIP 0x10 /* Invert the sense of DST OP. */
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#define IP6T_INV_FRAG 0x20 /* Invert the sense of FRAG. */
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#define IP6T_INV_PROTO XT_INV_PROTO
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#define IP6T_INV_MASK 0x7F /* All possible flag bits mask. */
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/* This structure defines each of the firewall rules. Consists of 3
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parts which are 1) general IP header stuff 2) match specific
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stuff 3) the target to perform if the rule matches */
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struct ip6t_entry {
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struct ip6t_ip6 ipv6;
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/* Mark with fields that we care about. */
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unsigned int nfcache;
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/* Size of ipt_entry + matches */
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__u16 target_offset;
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/* Size of ipt_entry + matches + target */
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__u16 next_offset;
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/* Back pointer */
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unsigned int comefrom;
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/* Packet and byte counters. */
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struct xt_counters counters;
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/* The matches (if any), then the target. */
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unsigned char elems[0];
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};
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/* Standard entry */
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struct ip6t_standard {
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struct ip6t_entry entry;
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struct xt_standard_target target;
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};
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struct ip6t_error {
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struct ip6t_entry entry;
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struct xt_error_target target;
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};
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#define IP6T_ENTRY_INIT(__size) \
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{ \
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.target_offset = sizeof(struct ip6t_entry), \
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.next_offset = (__size), \
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}
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#define IP6T_STANDARD_INIT(__verdict) \
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{ \
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.entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)), \
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.target = XT_TARGET_INIT(XT_STANDARD_TARGET, \
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sizeof(struct xt_standard_target)), \
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.target.verdict = -(__verdict) - 1, \
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}
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#define IP6T_ERROR_INIT \
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{ \
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.entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_error)), \
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.target = XT_TARGET_INIT(XT_ERROR_TARGET, \
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sizeof(struct xt_error_target)), \
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.target.errorname = "ERROR", \
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}
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/*
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* New IP firewall options for [gs]etsockopt at the RAW IP level.
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* Unlike BSD Linux inherits IP options so you don't have to use
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* a raw socket for this. Instead we check rights in the calls.
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*
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* ATTENTION: check linux/in6.h before adding new number here.
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*/
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#define IP6T_BASE_CTL 64
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#define IP6T_SO_SET_REPLACE (IP6T_BASE_CTL)
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#define IP6T_SO_SET_ADD_COUNTERS (IP6T_BASE_CTL + 1)
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#define IP6T_SO_SET_MAX IP6T_SO_SET_ADD_COUNTERS
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#define IP6T_SO_GET_INFO (IP6T_BASE_CTL)
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#define IP6T_SO_GET_ENTRIES (IP6T_BASE_CTL + 1)
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#define IP6T_SO_GET_REVISION_MATCH (IP6T_BASE_CTL + 4)
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#define IP6T_SO_GET_REVISION_TARGET (IP6T_BASE_CTL + 5)
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#define IP6T_SO_GET_MAX IP6T_SO_GET_REVISION_TARGET
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/* obtain original address if REDIRECT'd connection */
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#define IP6T_SO_ORIGINAL_DST 80
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/* ICMP matching stuff */
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struct ip6t_icmp {
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__u8 type; /* type to match */
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__u8 code[2]; /* range of code */
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__u8 invflags; /* Inverse flags */
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};
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/* Values for "inv" field for struct ipt_icmp. */
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#define IP6T_ICMP_INV 0x01 /* Invert the sense of type/code test */
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/* The argument to IP6T_SO_GET_INFO */
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struct ip6t_getinfo {
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/* Which table: caller fills this in. */
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char name[XT_TABLE_MAXNAMELEN];
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/* Kernel fills these in. */
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/* Which hook entry points are valid: bitmask */
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unsigned int valid_hooks;
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/* Hook entry points: one per netfilter hook. */
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unsigned int hook_entry[NF_INET_NUMHOOKS];
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/* Underflow points. */
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unsigned int underflow[NF_INET_NUMHOOKS];
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/* Number of entries */
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unsigned int num_entries;
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/* Size of entries. */
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unsigned int size;
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};
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/* The argument to IP6T_SO_SET_REPLACE. */
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struct ip6t_replace {
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/* Which table. */
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char name[XT_TABLE_MAXNAMELEN];
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/* Which hook entry points are valid: bitmask. You can't
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change this. */
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unsigned int valid_hooks;
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/* Number of entries */
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unsigned int num_entries;
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/* Total size of new entries */
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unsigned int size;
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/* Hook entry points. */
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unsigned int hook_entry[NF_INET_NUMHOOKS];
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/* Underflow points. */
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unsigned int underflow[NF_INET_NUMHOOKS];
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/* Information about old entries: */
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/* Number of counters (must be equal to current number of entries). */
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unsigned int num_counters;
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/* The old entries' counters. */
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struct xt_counters __user *counters;
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/* The entries (hang off end: not really an array). */
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struct ip6t_entry entries[0];
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};
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/* The argument to IP6T_SO_GET_ENTRIES. */
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struct ip6t_get_entries {
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/* Which table: user fills this in. */
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char name[XT_TABLE_MAXNAMELEN];
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/* User fills this in: total entry size. */
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unsigned int size;
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/* The entries. */
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struct ip6t_entry entrytable[0];
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};
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/* Helper functions */
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static __inline__ struct xt_entry_target *
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ip6t_get_target(struct ip6t_entry *e)
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{
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return (struct xt_entry_target *)((char *)e + e->target_offset);
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}
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/*
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* Main firewall chains definitions and global var's definitions.
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*/
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#endif /* _UAPI_IP6_TABLES_H */
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