netfilter: add xt_hmark target for hash-based skb marking

The target allows you to create rules in the "raw" and "mangle" tables which set the skbuff mark by means of hash calculation within a given range. The nfmark can influence the routing method (see "Use netfilter MARK value as routing key") and can also be used by other subsystems to change their behaviour. [ Part of this patch has been refactorized and modified by Pablo Neira Ayuso ] Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-05-02 07:49:47 +00:00
parent 84018f55ab
commit cf308a1fae
4 changed files with 423 additions and 0 deletions
@@ -0,0 +1,45 @@
+#ifndef XT_HMARK_H_
+#define XT_HMARK_H_
+
+#include <linux/types.h>
+
+enum {
+	XT_HMARK_SADDR_MASK,
+	XT_HMARK_DADDR_MASK,
+	XT_HMARK_SPI,
+	XT_HMARK_SPI_MASK,
+	XT_HMARK_SPORT,
+	XT_HMARK_DPORT,
+	XT_HMARK_SPORT_MASK,
+	XT_HMARK_DPORT_MASK,
+	XT_HMARK_PROTO_MASK,
+	XT_HMARK_RND,
+	XT_HMARK_MODULUS,
+	XT_HMARK_OFFSET,
+	XT_HMARK_CT,
+	XT_HMARK_METHOD_L3,
+	XT_HMARK_METHOD_L3_4,
+};
+#define XT_HMARK_FLAG(flag)	(1 << flag)
+
+union hmark_ports {
+	struct {
+		__u16	src;
+		__u16	dst;
+	} p16;
+	__u32	v32;
+};
+
+struct xt_hmark_info {
+	union nf_inet_addr	src_mask;
+	union nf_inet_addr	dst_mask;
+	union hmark_ports	port_mask;
+	union hmark_ports	port_set;
+	__u32			flags;
+	__u16			proto_mask;
+	__u32			hashrnd;
+	__u32			hmodulus;
+	__u32			hoffset;	/* Mark offset to start from */
+};
+
+#endif /* XT_HMARK_H_ */