LXR linux/include/linux/netfilter/xt

   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 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#ifdef __KERNEL__
  27#define XT_HASHLIMIT_ALL (XT_HASHLIMIT_HASH_DIP | XT_HASHLIMIT_HASH_DPT | \
  28                          XT_HASHLIMIT_HASH_SIP | XT_HASHLIMIT_HASH_SPT | \
  29                          XT_HASHLIMIT_INVERT | XT_HASHLIMIT_BYTES)
  30#endif
  31
  32struct hashlimit_cfg {
  33        __u32 mode;       /* bitmask of XT_HASHLIMIT_HASH_* */
  34        __u32 avg;    /* Average secs between packets * scale */
  35        __u32 burst;  /* Period multiplier for upper limit. */
  36
  37        /* user specified */
  38        __u32 size;             /* how many buckets */
  39        __u32 max;              /* max number of entries */
  40        __u32 gc_interval;      /* gc interval */
  41        __u32 expire;   /* when do entries expire? */
  42};
  43
  44struct xt_hashlimit_info {
  45        char name [IFNAMSIZ];           /* name */
  46        struct hashlimit_cfg cfg;
  47
  48        /* Used internally by the kernel */
  49        struct xt_hashlimit_htable *hinfo;
  50        union {
  51                void *ptr;
  52                struct xt_hashlimit_info *master;
  53        } u;
  54};
  55
  56struct hashlimit_cfg1 {
  57        __u32 mode;       /* bitmask of XT_HASHLIMIT_HASH_* */
  58        __u32 avg;    /* Average secs between packets * scale */
  59        __u32 burst;  /* Period multiplier for upper limit. */
  60
  61        /* user specified */
  62        __u32 size;             /* how many buckets */
  63        __u32 max;              /* max number of entries */
  64        __u32 gc_interval;      /* gc interval */
  65        __u32 expire;   /* when do entries expire? */
  66
  67        __u8 srcmask, dstmask;
  68};
  69
  70struct xt_hashlimit_mtinfo1 {
  71        char name[IFNAMSIZ];
  72        struct hashlimit_cfg1 cfg;
  73
  74        /* Used internally by the kernel */
  75        struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
  76};
  77
  78#endif /*_XT_HASHLIMIT_H*/
  79