1#ifndef _XT_HASHLIMIT_H 2#define _XT_HASHLIMIT_H 3 4#include <linux/types.h> 5 6/* timings are in milliseconds. */ 7#define XT_HASHLIMIT_SCALE 10000 8/* 1/10,000 sec period => max of 10,000/sec. Min rate is then 429490 9 * seconds, or one packet every 59 hours. 10 */ 11 12/* packet length accounting is done in 16-byte steps */ 13#define XT_HASHLIMIT_BYTE_SHIFT 4 14 15/* details of this structure hidden by the implementation */ 16struct xt_hashlimit_htable; 17 18enum { 19 XT_HASHLIMIT_HASH_DIP = 1 << 0, 20 XT_HASHLIMIT_HASH_DPT = 1 << 1, 21 XT_HASHLIMIT_HASH_SIP = 1 << 2, 22 XT_HASHLIMIT_HASH_SPT = 1 << 3, 23 XT_HASHLIMIT_INVERT = 1 << 4, 24 XT_HASHLIMIT_BYTES = 1 << 5, 25}; 26#ifdef __KERNEL__ 27#define XT_HASHLIMIT_ALL (XT_HASHLIMIT_HASH_DIP | XT_HASHLIMIT_HASH_DPT | \ 28 XT_HASHLIMIT_HASH_SIP | XT_HASHLIMIT_HASH_SPT | \ 29 XT_HASHLIMIT_INVERT | XT_HASHLIMIT_BYTES) 30#endif 31 32struct hashlimit_cfg { 33 __u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */ 34 __u32 avg; /* Average secs between packets * scale */ 35 __u32 burst; /* Period multiplier for upper limit. */ 36 37 /* user specified */ 38 __u32 size; /* how many buckets */ 39 __u32 max; /* max number of entries */ 40 __u32 gc_interval; /* gc interval */ 41 __u32 expire; /* when do entries expire? */ 42}; 43 44struct xt_hashlimit_info { 45 char name [IFNAMSIZ]; /* name */ 46 struct hashlimit_cfg cfg; 47 48 /* Used internally by the kernel */ 49 struct xt_hashlimit_htable *hinfo; 50 union { 51 void *ptr; 52 struct xt_hashlimit_info *master; 53 } u; 54}; 55 56struct hashlimit_cfg1 { 57 __u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */ 58 __u32 avg; /* Average secs between packets * scale */ 59 __u32 burst; /* Period multiplier for upper limit. */ 60 61 /* user specified */ 62 __u32 size; /* how many buckets */ 63 __u32 max; /* max number of entries */ 64 __u32 gc_interval; /* gc interval */ 65 __u32 expire; /* when do entries expire? */ 66 67 __u8 srcmask, dstmask; 68}; 69 70struct xt_hashlimit_mtinfo1 { 71 char name[IFNAMSIZ]; 72 struct hashlimit_cfg1 cfg; 73 74 /* Used internally by the kernel */ 75 struct xt_hashlimit_htable *hinfo __attribute__((aligned(8))); 76}; 77 78#endif /*_XT_HASHLIMIT_H*/ 79