include/linux/netfilter_ipv4/ipt_hashlimit.h

   1 #ifndef _IPT_HASHLIMIT_H
   2 #define _IPT_HASHLIMIT_H
   3
   4 /* timings are in milliseconds. */
   5 #define IPT_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 ipt_hashlimit_htable;
  11
  12 #define IPT_HASHLIMIT_HASH_DIP  0x0001
  13 #define IPT_HASHLIMIT_HASH_DPT  0x0002
  14 #define IPT_HASHLIMIT_HASH_SIP  0x0004
  15 #define IPT_HASHLIMIT_HASH_SPT  0x0008
  16
  17 struct hashlimit_cfg {
  18         u_int32_t mode;   /* bitmask of IPT_HASHLIMIT_HASH_* */
  19         u_int32_t avg;    /* Average secs between packets * scale */
  20         u_int32_t burst;  /* Period multiplier for upper limit. */
  21
  22         /* user specified */
  23         u_int32_t size;         /* how many buckets */
  24         u_int32_t max;          /* max number of entries */
  25         u_int32_t gc_interval;  /* gc interval */
  26         u_int32_t expire;       /* when do entries expire? */
  27 };
  28
  29 struct ipt_hashlimit_info {
  30         char name [IFNAMSIZ];           /* name */
  31         struct hashlimit_cfg cfg;
  32         struct ipt_hashlimit_htable *hinfo;
  33
  34         /* Used internally by the kernel */
  35         union {
  36                 void *ptr;
  37                 struct ipt_hashlimit_info *master;
  38         } u;
  39 };
  40 #endif /*_IPT_HASHLIMIT_H*/