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#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 */
  17struct xt_hashlimit_htable;
  18
  19enum {
  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
  28struct 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
  40struct 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
  52struct 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
  66struct 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 */
  75