1 #ifndef _XT_HASHLIMIT_H
2 #define _XT_HASHLIMIT_H
4 #include <linux/types.h>
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.
12 /* packet length accounting is done in 16-byte steps */
13 #define XT_HASHLIMIT_BYTE_SHIFT 4
15 /* details of this structure hidden by the implementation */
16 struct xt_hashlimit_htable;
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,
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)
32 struct 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. */
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? */
44 struct xt_hashlimit_info {
45 char name [IFNAMSIZ]; /* name */
46 struct hashlimit_cfg cfg;
48 /* Used internally by the kernel */
49 struct xt_hashlimit_htable *hinfo;
52 struct xt_hashlimit_info *master;
56 struct 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. */
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? */
67 __u8 srcmask, dstmask;
70 struct xt_hashlimit_mtinfo1 {
72 struct hashlimit_cfg1 cfg;
74 /* Used internally by the kernel */
75 struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
78 #endif /*_XT_HASHLIMIT_H*/