x_tables.h revision b4397f580e6eb3f20e8c433833be20283b44a3bc
1e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#ifndef _X_TABLES_H 2e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#define _X_TABLES_H 3b4397f580e6eb3f20e8c433833be20283b44a3bcStephen Hemminger#include <linux/kernel.h> 4c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger#include <linux/types.h> 5c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger 6e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#define XT_FUNCTION_MAXNAMELEN 30 7b4397f580e6eb3f20e8c433833be20283b44a3bcStephen Hemminger#define XT_EXTENSION_MAXNAMELEN 29 8e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#define XT_TABLE_MAXNAMELEN 32 9e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 10ab322673298bd0b8927cdd9d11f3d36af5941b93Stephen Hemmingerstruct xt_entry_match { 11e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger union { 12e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger struct { 13c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u16 match_size; 14e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 15e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger /* Used by userspace */ 16b4397f580e6eb3f20e8c433833be20283b44a3bcStephen Hemminger char name[XT_EXTENSION_MAXNAMELEN]; 17c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u8 revision; 18e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger } user; 19e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger struct { 20c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u16 match_size; 21e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 22e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger /* Used inside the kernel */ 23e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger struct xt_match *match; 24e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger } kernel; 25e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 26e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger /* Total length */ 27c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u16 match_size; 28e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger } u; 29e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 30e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger unsigned char data[0]; 31e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger}; 32e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 33ab322673298bd0b8927cdd9d11f3d36af5941b93Stephen Hemmingerstruct xt_entry_target { 34e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger union { 35e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger struct { 36c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u16 target_size; 37e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 38e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger /* Used by userspace */ 39b4397f580e6eb3f20e8c433833be20283b44a3bcStephen Hemminger char name[XT_EXTENSION_MAXNAMELEN]; 40c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u8 revision; 41e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger } user; 42e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger struct { 43c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u16 target_size; 44e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 45e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger /* Used inside the kernel */ 46e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger struct xt_target *target; 47e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger } kernel; 48e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 49e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger /* Total length */ 50c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u16 target_size; 51e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger } u; 52e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 53e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger unsigned char data[0]; 54e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger}; 55e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 56de3d12f48ac1869fc9f9cb442b2d692b027d8a14Stephen Hemminger#define XT_TARGET_INIT(__name, __size) \ 57de3d12f48ac1869fc9f9cb442b2d692b027d8a14Stephen Hemminger{ \ 58de3d12f48ac1869fc9f9cb442b2d692b027d8a14Stephen Hemminger .target.u.user = { \ 59de3d12f48ac1869fc9f9cb442b2d692b027d8a14Stephen Hemminger .target_size = XT_ALIGN(__size), \ 60de3d12f48ac1869fc9f9cb442b2d692b027d8a14Stephen Hemminger .name = __name, \ 61de3d12f48ac1869fc9f9cb442b2d692b027d8a14Stephen Hemminger }, \ 62de3d12f48ac1869fc9f9cb442b2d692b027d8a14Stephen Hemminger} 63de3d12f48ac1869fc9f9cb442b2d692b027d8a14Stephen Hemminger 64ab322673298bd0b8927cdd9d11f3d36af5941b93Stephen Hemmingerstruct xt_standard_target { 65e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger struct xt_entry_target target; 66e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger int verdict; 67e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger}; 68e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 69e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger/* The argument to IPT_SO_GET_REVISION_*. Returns highest revision 70e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger * kernel supports, if >= revision. */ 71ab322673298bd0b8927cdd9d11f3d36af5941b93Stephen Hemmingerstruct xt_get_revision { 72b4397f580e6eb3f20e8c433833be20283b44a3bcStephen Hemminger char name[XT_EXTENSION_MAXNAMELEN]; 73c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u8 revision; 74e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger}; 75e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 76e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger/* CONTINUE verdict for targets */ 77e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#define XT_CONTINUE 0xFFFFFFFF 78e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 79e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger/* For standard target */ 80e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#define XT_RETURN (-NF_REPEAT - 1) 81e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 82e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger/* this is a dummy structure to find out the alignment requirement for a struct 83e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger * containing all the fundamental data types that are used in ipt_entry, 84e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger * ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my 85e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger * personal pleasure to remove it -HW 86e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger */ 87ab322673298bd0b8927cdd9d11f3d36af5941b93Stephen Hemmingerstruct _xt_align { 88c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u8 u8; 89c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u16 u16; 90c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u32 u32; 91c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u64 u64; 92e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger}; 93e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 94b4397f580e6eb3f20e8c433833be20283b44a3bcStephen Hemminger#define XT_ALIGN(s) __ALIGN_KERNEL((s), __alignof__(struct _xt_align)) 95e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 96e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger/* Standard return verdict, or do jump. */ 97e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#define XT_STANDARD_TARGET "" 98e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger/* Error verdict. */ 99e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#define XT_ERROR_TARGET "ERROR" 100e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 101e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0) 102e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0) 103e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 104ab322673298bd0b8927cdd9d11f3d36af5941b93Stephen Hemmingerstruct xt_counters { 105c40bba6922b470c0fd0c7a7b8b09584527c468e9Stephen Hemminger __u64 pcnt, bcnt; /* Packet and byte counters */ 106e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger}; 107e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 108e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger/* The argument to IPT_SO_ADD_COUNTERS. */ 109ab322673298bd0b8927cdd9d11f3d36af5941b93Stephen Hemmingerstruct xt_counters_info { 110e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger /* Which table. */ 111e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger char name[XT_TABLE_MAXNAMELEN]; 112e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 113e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger unsigned int num_counters; 114e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 115e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger /* The counters (actually `number' of these). */ 116e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger struct xt_counters counters[0]; 117e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger}; 118e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 119e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */ 120e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 121bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger/* fn returns 0 to continue iteration */ 122bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger#define XT_MATCH_ITERATE(type, e, fn, args...) \ 123bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger({ \ 124bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger unsigned int __i; \ 125bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger int __ret = 0; \ 126bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger struct xt_entry_match *__m; \ 127bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger \ 128bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger for (__i = sizeof(type); \ 129bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __i < (e)->target_offset; \ 130bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __i += __m->u.match_size) { \ 131bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __m = (void *)e + __i; \ 132bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger \ 133bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __ret = fn(__m , ## args); \ 134bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger if (__ret != 0) \ 135bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger break; \ 136bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger } \ 137bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __ret; \ 138bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger}) 139bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger 140bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger/* fn returns 0 to continue iteration */ 141bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger#define XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \ 142bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger({ \ 143bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger unsigned int __i, __n; \ 144bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger int __ret = 0; \ 145bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger type *__entry; \ 146bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger \ 147bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger for (__i = 0, __n = 0; __i < (size); \ 148bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __i += __entry->next_offset, __n++) { \ 149bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __entry = (void *)(entries) + __i; \ 150bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger if (__n < n) \ 151bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger continue; \ 152bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger \ 153bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __ret = fn(__entry , ## args); \ 154bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger if (__ret != 0) \ 155bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger break; \ 156bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger } \ 157bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __ret; \ 158bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger}) 159bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger 160bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger/* fn returns 0 to continue iteration */ 161bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger#define XT_ENTRY_ITERATE(type, entries, size, fn, args...) \ 162bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args) 163bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger 164e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger 1658ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger/* pos is normally a struct ipt_entry/ip6t_entry/etc. */ 1668ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger#define xt_entry_foreach(pos, ehead, esize) \ 1678ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger for ((pos) = (typeof(pos))(ehead); \ 1688ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger (pos) < (typeof(pos))((char *)(ehead) + (esize)); \ 1698ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger (pos) = (typeof(pos))((char *)(pos) + (pos)->next_offset)) 1708ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger 1718ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger/* can only be xt_entry_match, so no use of typeof here */ 1728ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger#define xt_ematch_foreach(pos, entry) \ 1738ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger for ((pos) = (struct xt_entry_match *)entry->elems; \ 1748ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger (pos) < (struct xt_entry_match *)((char *)(entry) + \ 1758ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger (entry)->target_offset); \ 1768ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger (pos) = (struct xt_entry_match *)((char *)(pos) + \ 1778ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger (pos)->u.match_size)) 1788ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger 1798ecdcce08319d0e39b0d32c1d17db3f69d85a35cStephen Hemminger 180e309c5fa6adf7c48074a08126721838ad4ea2749Stephen Hemminger#endif /* _X_TABLES_H */ 181