diff options
Diffstat (limited to 'include/uapi/linux/netfilter/xt_hashlimit.h')
-rw-r--r-- | include/uapi/linux/netfilter/xt_hashlimit.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/include/uapi/linux/netfilter/xt_hashlimit.h b/include/uapi/linux/netfilter/xt_hashlimit.h new file mode 100644 index 0000000..cbfc43d --- /dev/null +++ b/include/uapi/linux/netfilter/xt_hashlimit.h @@ -0,0 +1,73 @@ +#ifndef _UAPI_XT_HASHLIMIT_H +#define _UAPI_XT_HASHLIMIT_H + +#include <linux/types.h> + +/* timings are in milliseconds. */ +#define XT_HASHLIMIT_SCALE 10000 +/* 1/10,000 sec period => max of 10,000/sec. Min rate is then 429490 + * seconds, or one packet every 59 hours. + */ + +/* packet length accounting is done in 16-byte steps */ +#define XT_HASHLIMIT_BYTE_SHIFT 4 + +/* details of this structure hidden by the implementation */ +struct xt_hashlimit_htable; + +enum { + XT_HASHLIMIT_HASH_DIP = 1 << 0, + XT_HASHLIMIT_HASH_DPT = 1 << 1, + XT_HASHLIMIT_HASH_SIP = 1 << 2, + XT_HASHLIMIT_HASH_SPT = 1 << 3, + XT_HASHLIMIT_INVERT = 1 << 4, + XT_HASHLIMIT_BYTES = 1 << 5, +}; + +struct hashlimit_cfg { + __u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */ + __u32 avg; /* Average secs between packets * scale */ + __u32 burst; /* Period multiplier for upper limit. */ + + /* user specified */ + __u32 size; /* how many buckets */ + __u32 max; /* max number of entries */ + __u32 gc_interval; /* gc interval */ + __u32 expire; /* when do entries expire? */ +}; + +struct xt_hashlimit_info { + char name [IFNAMSIZ]; /* name */ + struct hashlimit_cfg cfg; + + /* Used internally by the kernel */ + struct xt_hashlimit_htable *hinfo; + union { + void *ptr; + struct xt_hashlimit_info *master; + } u; +}; + +struct hashlimit_cfg1 { + __u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */ + __u32 avg; /* Average secs between packets * scale */ + __u32 burst; /* Period multiplier for upper limit. */ + + /* user specified */ + __u32 size; /* how many buckets */ + __u32 max; /* max number of entries */ + __u32 gc_interval; /* gc interval */ + __u32 expire; /* when do entries expire? */ + + __u8 srcmask, dstmask; +}; + +struct xt_hashlimit_mtinfo1 { + char name[IFNAMSIZ]; + struct hashlimit_cfg1 cfg; + + /* Used internally by the kernel */ + struct xt_hashlimit_htable *hinfo __attribute__((aligned(8))); +}; + +#endif /* _UAPI_XT_HASHLIMIT_H */ |