1 #ifndef _UAPI_XT_HASHLIMIT_H
2 #define _UAPI_XT_HASHLIMIT_H
4 #include <linux/types.h>
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.
13 /* packet length accounting is done in 16-byte steps */
14 #define XT_HASHLIMIT_BYTE_SHIFT 4
16 /* details of this structure hidden by the implementation */
17 struct xt_hashlimit_htable;
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,
28 struct 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. */
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? */
40 struct xt_hashlimit_info {
41 char name [IFNAMSIZ]; /* name */
42 struct hashlimit_cfg cfg;
44 /* Used internally by the kernel */
45 struct xt_hashlimit_htable *hinfo;
48 struct xt_hashlimit_info *master;
52 struct 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. */
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? */
63 __u8 srcmask, dstmask;
66 struct xt_hashlimit_mtinfo1 {
68 struct hashlimit_cfg1 cfg;
70 /* Used internally by the kernel */
71 struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
74 #endif /* _UAPI_XT_HASHLIMIT_H */