include/uapi/linux/netfilter/xt_hashlimit.h

   1 #ifndef _UAPI_XT_HASHLIMIT_H
   2 #define _UAPI_XT_HASHLIMIT_H
   3
   4 #include <linux/types.h>
   5 #include <linux/if.h>
   6
   7 /* timings are in milliseconds. */
   8 #define XT_HASHLIMIT_SCALE 10000
   9 #define XT_HASHLIMIT_SCALE_v2 1000000llu
  10 /* 1/10,000 sec period => max of 10,000/sec.  Min rate is then 429490
  11  * seconds, or one packet every 59 hours.
  12  */
  13
  14 /* packet length accounting is done in 16-byte steps */
  15 #define XT_HASHLIMIT_BYTE_SHIFT 4
  16
  17 /* details of this structure hidden by the implementation */
  18 struct xt_hashlimit_htable;
  19
  20 enum {
  21         XT_HASHLIMIT_HASH_DIP = 1 << 0,
  22         XT_HASHLIMIT_HASH_DPT = 1 << 1,
  23         XT_HASHLIMIT_HASH_SIP = 1 << 2,
  24         XT_HASHLIMIT_HASH_SPT = 1 << 3,
  25         XT_HASHLIMIT_INVERT   = 1 << 4,
  26         XT_HASHLIMIT_BYTES    = 1 << 5,
  27 };
  28
  29 struct hashlimit_cfg {
  30         __u32 mode;       /* bitmask of XT_HASHLIMIT_HASH_* */
  31         __u32 avg;    /* Average secs between packets * scale */
  32         __u32 burst;  /* Period multiplier for upper limit. */
  33
  34         /* user specified */
  35         __u32 size;             /* how many buckets */
  36         __u32 max;              /* max number of entries */
  37         __u32 gc_interval;      /* gc interval */
  38         __u32 expire;   /* when do entries expire? */
  39 };
  40
  41 struct xt_hashlimit_info {
  42         char name [IFNAMSIZ];           /* name */
  43         struct hashlimit_cfg cfg;
  44
  45         /* Used internally by the kernel */
  46         struct xt_hashlimit_htable *hinfo;
  47         union {
  48                 void *ptr;
  49                 struct xt_hashlimit_info *master;
  50         } u;
  51 };
  52
  53 struct hashlimit_cfg1 {
  54         __u32 mode;       /* bitmask of XT_HASHLIMIT_HASH_* */
  55         __u32 avg;    /* Average secs between packets * scale */
  56         __u32 burst;  /* Period multiplier for upper limit. */
  57
  58         /* user specified */
  59         __u32 size;             /* how many buckets */
  60         __u32 max;              /* max number of entries */
  61         __u32 gc_interval;      /* gc interval */
  62         __u32 expire;   /* when do entries expire? */
  63
  64         __u8 srcmask, dstmask;
  65 };
  66
  67 struct hashlimit_cfg2 {
  68         __u64 avg;              /* Average secs between packets * scale */
  69         __u64 burst;            /* Period multiplier for upper limit. */
  70         __u32 mode;             /* bitmask of XT_HASHLIMIT_HASH_* */
  71
  72         /* user specified */
  73         __u32 size;             /* how many buckets */
  74         __u32 max;              /* max number of entries */
  75         __u32 gc_interval;      /* gc interval */
  76         __u32 expire;           /* when do entries expire? */
  77
  78         __u8 srcmask, dstmask;
  79 };
  80
  81 struct xt_hashlimit_mtinfo1 {
  82         char name[IFNAMSIZ];
  83         struct hashlimit_cfg1 cfg;
  84
  85         /* Used internally by the kernel */
  86         struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
  87 };
  88
  89 struct xt_hashlimit_mtinfo2 {
  90         char name[NAME_MAX];
  91         struct hashlimit_cfg2 cfg;
  92
  93         /* Used internally by the kernel */
  94         struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
  95 };
  96
  97 #endif /* _UAPI_XT_HASHLIMIT_H */