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