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