include/linux/netfilter/xt_hashlimit.h

   1 #ifndef _XT_HASHLIMIT_H
   2 #define _XT_HASHLIMIT_H
   3
   4 /* timings are in milliseconds. */
   5 #define XT_HASHLIMIT_SCALE 10000
   6 /* 1/10,000 sec period => max of 10,000/sec.  Min rate is then 429490
   7    seconds, or one every 59 hours. */
   8
   9 /* details of this structure hidden by the implementation */
  10 struct xt_hashlimit_htable;
  11
  12 enum {
  13         XT_HASHLIMIT_HASH_DIP = 1 << 0,
  14         XT_HASHLIMIT_HASH_DPT = 1 << 1,
  15         XT_HASHLIMIT_HASH_SIP = 1 << 2,
  16         XT_HASHLIMIT_HASH_SPT = 1 << 3,
  17         XT_HASHLIMIT_INVERT   = 1 << 4,
  18 };
  19
  20 struct hashlimit_cfg {
  21         u_int32_t mode;   /* bitmask of XT_HASHLIMIT_HASH_* */
  22         u_int32_t avg;    /* Average secs between packets * scale */
  23         u_int32_t burst;  /* Period multiplier for upper limit. */
  24
  25         /* user specified */
  26         u_int32_t size;         /* how many buckets */
  27         u_int32_t max;          /* max number of entries */
  28         u_int32_t gc_interval;  /* gc interval */
  29         u_int32_t expire;       /* when do entries expire? */
  30 };
  31
  32 struct xt_hashlimit_info {
  33         char name [IFNAMSIZ];           /* name */
  34         struct hashlimit_cfg cfg;
  35
  36         /* Used internally by the kernel */
  37         struct xt_hashlimit_htable *hinfo;
  38         union {
  39                 void *ptr;
  40                 struct xt_hashlimit_info *master;
  41         } u;
  42 };
  43
  44 struct hashlimit_cfg1 {
  45         u_int32_t mode;   /* bitmask of XT_HASHLIMIT_HASH_* */
  46         u_int32_t avg;    /* Average secs between packets * scale */
  47         u_int32_t burst;  /* Period multiplier for upper limit. */
  48
  49         /* user specified */
  50         u_int32_t size;         /* how many buckets */
  51         u_int32_t max;          /* max number of entries */
  52         u_int32_t gc_interval;  /* gc interval */
  53         u_int32_t expire;       /* when do entries expire? */
  54
  55         u_int8_t srcmask, dstmask;
  56 };
  57
  58 struct xt_hashlimit_mtinfo1 {
  59         char name[IFNAMSIZ];
  60         struct hashlimit_cfg1 cfg;
  61
  62         /* Used internally by the kernel */
  63         struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
  64         struct xt_hashlimit_mtinfo1 *master __attribute__((aligned(8)));
  65 };
  66
  67 #endif /*_XT_HASHLIMIT_H*/