include/linux/netfilter/xt_hashlimit.h

   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 every 59 hours. */
  10
  11 /* details of this structure hidden by the implementation */
  12 struct xt_hashlimit_htable;
  13
  14 enum {
  15         XT_HASHLIMIT_HASH_DIP = 1 << 0,
  16         XT_HASHLIMIT_HASH_DPT = 1 << 1,
  17         XT_HASHLIMIT_HASH_SIP = 1 << 2,
  18         XT_HASHLIMIT_HASH_SPT = 1 << 3,
  19         XT_HASHLIMIT_INVERT   = 1 << 4,
  20 };
  21
  22 struct hashlimit_cfg {
  23         __u32 mode;       /* bitmask of XT_HASHLIMIT_HASH_* */
  24         __u32 avg;    /* Average secs between packets * scale */
  25         __u32 burst;  /* Period multiplier for upper limit. */
  26
  27         /* user specified */
  28         __u32 size;             /* how many buckets */
  29         __u32 max;              /* max number of entries */
  30         __u32 gc_interval;      /* gc interval */
  31         __u32 expire;   /* when do entries expire? */
  32 };
  33
  34 struct xt_hashlimit_info {
  35         char name [IFNAMSIZ];           /* name */
  36         struct hashlimit_cfg cfg;
  37
  38         /* Used internally by the kernel */
  39         struct xt_hashlimit_htable *hinfo;
  40         union {
  41                 void *ptr;
  42                 struct xt_hashlimit_info *master;
  43         } u;
  44 };
  45
  46 struct hashlimit_cfg1 {
  47         __u32 mode;       /* bitmask of XT_HASHLIMIT_HASH_* */
  48         __u32 avg;    /* Average secs between packets * scale */
  49         __u32 burst;  /* Period multiplier for upper limit. */
  50
  51         /* user specified */
  52         __u32 size;             /* how many buckets */
  53         __u32 max;              /* max number of entries */
  54         __u32 gc_interval;      /* gc interval */
  55         __u32 expire;   /* when do entries expire? */
  56
  57         __u8 srcmask, dstmask;
  58 };
  59
  60 struct xt_hashlimit_mtinfo1 {
  61         char name[IFNAMSIZ];
  62         struct hashlimit_cfg1 cfg;
  63
  64         /* Used internally by the kernel */
  65         struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
  66 };
  67
  68 #endif /*_XT_HASHLIMIT_H*/