1 #ifndef _UAPI_XT_HASHLIMIT_H 2 #define _UAPI_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 */ 16 struct xt_hashlimit_htable; 17 18 enum { 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 27 struct hashlimit_cfg { 28 __u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */ 29 __u32 avg; /* Average secs between packets * scale */ 30 __u32 burst; /* Period multiplier for upper limit. */ 31 32 /* user specified */ 33 __u32 size; /* how many buckets */ 34 __u32 max; /* max number of entries */ 35 __u32 gc_interval; /* gc interval */ 36 __u32 expire; /* when do entries expire? */ 37 }; 38 39 struct xt_hashlimit_info { 40 char name [IFNAMSIZ]; /* name */ 41 struct hashlimit_cfg cfg; 42 43 /* Used internally by the kernel */ 44 struct xt_hashlimit_htable *hinfo; 45 union { 46 void *ptr; 47 struct xt_hashlimit_info *master; 48 } u; 49 }; 50 51 struct hashlimit_cfg1 { 52 __u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */ 53 __u32 avg; /* Average secs between packets * scale */ 54 __u32 burst; /* Period multiplier for upper limit. */ 55 56 /* user specified */ 57 __u32 size; /* how many buckets */ 58 __u32 max; /* max number of entries */ 59 __u32 gc_interval; /* gc interval */ 60 __u32 expire; /* when do entries expire? */ 61 62 __u8 srcmask, dstmask; 63 }; 64 65 struct xt_hashlimit_mtinfo1 { 66 char name[IFNAMSIZ]; 67 struct hashlimit_cfg1 cfg; 68 69 /* Used internally by the kernel */ 70 struct xt_hashlimit_htable *hinfo __attribute__((aligned(8))); 71 }; 72 73 #endif /* _UAPI_XT_HASHLIMIT_H */ 74