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 000000000000..cbfc43d1af68
--- /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 */