xt_hashlimit.h revision 350661a6eb089f3e54e67e022db9e16ea280499f 
1#ifndef _XT_HASHLIMIT_H
2#define _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 every 59 hours. */
10
11/* details of this structure hidden by the implementation */
12struct xt_hashlimit_htable;
13
14enum {
15	XT_HASHLIMIT_HASH_DIP = 1 << 0,
16	XT_HASHLIMIT_HASH_DPT = 1 << 1,
17	XT_HASHLIMIT_HASH_SIP = 1 << 2,
18	XT_HASHLIMIT_HASH_SPT = 1 << 3,
19	XT_HASHLIMIT_INVERT   = 1 << 4,
20};
21
22struct hashlimit_cfg {
23	__u32 mode;	  /* bitmask of XT_HASHLIMIT_HASH_* */
24	__u32 avg;    /* Average secs between packets * scale */
25	__u32 burst;  /* Period multiplier for upper limit. */
26
27	/* user specified */
28	__u32 size;		/* how many buckets */
29	__u32 max;		/* max number of entries */
30	__u32 gc_interval;	/* gc interval */
31	__u32 expire;	/* when do entries expire? */
32};
33
34struct xt_hashlimit_info {
35	char name [IFNAMSIZ];		/* name */
36	struct hashlimit_cfg cfg;
37
38	/* Used internally by the kernel */
39	struct xt_hashlimit_htable *hinfo;
40	union {
41		void *ptr;
42		struct xt_hashlimit_info *master;
43	} u;
44};
45
46struct hashlimit_cfg1 {
47	__u32 mode;	  /* bitmask of XT_HASHLIMIT_HASH_* */
48	__u32 avg;    /* Average secs between packets * scale */
49	__u32 burst;  /* Period multiplier for upper limit. */
50
51	/* user specified */
52	__u32 size;		/* how many buckets */
53	__u32 max;		/* max number of entries */
54	__u32 gc_interval;	/* gc interval */
55	__u32 expire;	/* when do entries expire? */
56
57	__u8 srcmask, dstmask;
58};
59
60struct xt_hashlimit_mtinfo1 {
61	char name[IFNAMSIZ];
62	struct hashlimit_cfg1 cfg;
63
64	/* Used internally by the kernel */
65	struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
66};
67
68#endif /*_XT_HASHLIMIT_H*/
69