/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_XT_HASHLIMIT_H
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#define _UAPI_XT_HASHLIMIT_H
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#include <linux/types.h>
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#include <linux/limits.h>
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#include <linux/if.h>
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/* timings are in milliseconds. */
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#define XT_HASHLIMIT_SCALE 10000
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#define XT_HASHLIMIT_SCALE_v2 1000000llu
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/* 1/10,000 sec period => max of 10,000/sec. Min rate is then 429490
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* seconds, or one packet every 59 hours.
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*/
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/* packet length accounting is done in 16-byte steps */
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#define XT_HASHLIMIT_BYTE_SHIFT 4
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/* details of this structure hidden by the implementation */
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struct xt_hashlimit_htable;
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enum {
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XT_HASHLIMIT_HASH_DIP = 1 << 0,
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XT_HASHLIMIT_HASH_DPT = 1 << 1,
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XT_HASHLIMIT_HASH_SIP = 1 << 2,
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XT_HASHLIMIT_HASH_SPT = 1 << 3,
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XT_HASHLIMIT_INVERT = 1 << 4,
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XT_HASHLIMIT_BYTES = 1 << 5,
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XT_HASHLIMIT_RATE_MATCH = 1 << 6,
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};
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struct hashlimit_cfg {
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__u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */
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__u32 avg; /* Average secs between packets * scale */
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__u32 burst; /* Period multiplier for upper limit. */
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/* user specified */
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__u32 size; /* how many buckets */
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__u32 max; /* max number of entries */
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__u32 gc_interval; /* gc interval */
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__u32 expire; /* when do entries expire? */
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};
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struct xt_hashlimit_info {
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char name [IFNAMSIZ]; /* name */
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struct hashlimit_cfg cfg;
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/* Used internally by the kernel */
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struct xt_hashlimit_htable *hinfo;
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union {
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void *ptr;
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struct xt_hashlimit_info *master;
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} u;
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};
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struct hashlimit_cfg1 {
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__u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */
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__u32 avg; /* Average secs between packets * scale */
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__u32 burst; /* Period multiplier for upper limit. */
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/* user specified */
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__u32 size; /* how many buckets */
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__u32 max; /* max number of entries */
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__u32 gc_interval; /* gc interval */
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__u32 expire; /* when do entries expire? */
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__u8 srcmask, dstmask;
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};
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struct hashlimit_cfg2 {
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__u64 avg; /* Average secs between packets * scale */
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__u64 burst; /* Period multiplier for upper limit. */
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__u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */
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/* user specified */
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__u32 size; /* how many buckets */
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__u32 max; /* max number of entries */
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__u32 gc_interval; /* gc interval */
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__u32 expire; /* when do entries expire? */
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__u8 srcmask, dstmask;
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};
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struct hashlimit_cfg3 {
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__u64 avg; /* Average secs between packets * scale */
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__u64 burst; /* Period multiplier for upper limit. */
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__u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */
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/* user specified */
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__u32 size; /* how many buckets */
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__u32 max; /* max number of entries */
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__u32 gc_interval; /* gc interval */
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__u32 expire; /* when do entries expire? */
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__u32 interval;
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__u8 srcmask, dstmask;
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};
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struct xt_hashlimit_mtinfo1 {
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char name[IFNAMSIZ];
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struct hashlimit_cfg1 cfg;
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/* Used internally by the kernel */
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struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
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};
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struct xt_hashlimit_mtinfo2 {
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char name[NAME_MAX];
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struct hashlimit_cfg2 cfg;
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/* Used internally by the kernel */
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struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
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};
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struct xt_hashlimit_mtinfo3 {
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char name[NAME_MAX];
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struct hashlimit_cfg3 cfg;
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/* Used internally by the kernel */
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struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
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};
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#endif /* _UAPI_XT_HASHLIMIT_H */
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