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