| /* 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 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/if.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 |
| #define ip6t_entry_match xt_entry_match |
| #define ip6t_entry_target xt_entry_target |
| #define ip6t_standard_target xt_standard_target |
| #define ip6t_error_target xt_error_target |
| #define ip6t_counters xt_counters |
| #define IP6T_CONTINUE XT_CONTINUE |
| #define IP6T_RETURN XT_RETURN |
| |
| /* Pre-iptables-1.4.0 */ |
| #include <linux/netfilter/xt_tcpudp.h> |
| #define ip6t_tcp xt_tcp |
| #define ip6t_udp xt_udp |
| #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 |
| #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 |
| |
| #define ip6t_counters_info xt_counters_info |
| #define IP6T_STANDARD_TARGET XT_STANDARD_TARGET |
| #define IP6T_ERROR_TARGET XT_ERROR_TARGET |
| #define IP6T_MATCH_ITERATE(e, fn, args...) \ |
| XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args) |
| #define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \ |
| XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args) |
| |
| /* 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. |
| */ |
| __u16 proto; |
| /* TOS to match iff flags & IP6T_F_TOS */ |
| __u8 tos; |
| |
| /* Flags word */ |
| __u8 flags; |
| /* Inverse flags */ |
| __u8 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 */ |
| __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]; |
| }; |
| |
| /* Standard entry */ |
| struct ip6t_standard { |
| struct ip6t_entry entry; |
| struct xt_standard_target target; |
| }; |
| |
| struct ip6t_error { |
| struct ip6t_entry entry; |
| struct xt_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(XT_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(XT_ERROR_TARGET, \ |
| sizeof(struct xt_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 |
| |
| /* obtain original address if REDIRECT'd connection */ |
| #define IP6T_SO_ORIGINAL_DST 80 |
| |
| /* ICMP matching stuff */ |
| struct ip6t_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 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 *counters; |
| |
| /* The entries (hang off end: not really an array). */ |
| struct ip6t_entry entries[0]; |
| }; |
| |
| /* 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]; |
| }; |
| |
| /* Helper functions */ |
| static __inline__ struct xt_entry_target * |
| ip6t_get_target(struct ip6t_entry *e) |
| { |
| return (void *)e + e->target_offset; |
| } |
| |
| /* |
| * Main firewall chains definitions and global var's definitions. |
| */ |
| |
| #endif /* _IP6_TABLES_H */ |