LXR linux/include/uapi/linux/netfilter/xt

   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 */
  16struct xt_hashlimit_htable;
  17
  18enum {
  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
  27struct 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
  39struct 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
  51struct 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
  65struct 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