Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ipt_CLASSIFY.h
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-2.4.35.4/include/linux/netfilter_ipv4/ipt_CLASSIFY.h	2007-12-15 05:20:11.684506105 +0100
@@ -0,0 +1,8 @@
+#ifndef _IPT_CLASSIFY_H
+#define _IPT_CLASSIFY_H
+
+struct ipt_classify_target_info {
+	u_int32_t priority;
+};
+
+#endif /*_IPT_CLASSIFY_H */
Index: linux-2.4.35.4/net/ipv4/netfilter/Config.in
===================================================================
--- linux-2.4.35.4.orig/net/ipv4/netfilter/Config.in	2007-12-15 05:20:11.208478976 +0100
+++ linux-2.4.35.4/net/ipv4/netfilter/Config.in	2007-12-15 05:20:11.688506331 +0100
@@ -172,6 +172,7 @@
     dep_tristate '    DSCP target support' CONFIG_IP_NF_TARGET_DSCP $CONFIG_IP_NF_MANGLE
  
     dep_tristate '    MARK target support' CONFIG_IP_NF_TARGET_MARK $CONFIG_IP_NF_MANGLE
+    dep_tristate '    CLASSIFY target support (EXPERIMENTAL)' CONFIG_IP_NF_TARGET_CLASSIFY $CONFIG_IP_NF_MANGLE
     dep_tristate '    IMQ target support' CONFIG_IP_NF_TARGET_IMQ $CONFIG_IP_NF_MANGLE
   fi
   if [ "$CONFIG_IP_NF_CONNTRACK_MARK" != "n" ]; then
Index: linux-2.4.35.4/net/ipv4/netfilter/ipt_CLASSIFY.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-2.4.35.4/net/ipv4/netfilter/ipt_CLASSIFY.c	2007-12-15 05:20:11.696506789 +0100
@@ -0,0 +1,82 @@
+/*
+ * This is a module which is used for setting the skb->priority field
+ * of an skb for qdisc classification.
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <net/checksum.h>
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_CLASSIFY.h>
+
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("iptables qdisc classification target module");
+
+static unsigned int
+target(struct sk_buff **pskb,
+       unsigned int hooknum,
+       const struct net_device *in,
+       const struct net_device *out,
+       const void *targinfo,
+       void *userinfo)
+{
+	const struct ipt_classify_target_info *clinfo = targinfo;
+
+	if((*pskb)->priority != clinfo->priority) {
+		(*pskb)->priority = clinfo->priority;
+		(*pskb)->nfcache |= NFC_ALTERED;
+	}
+
+	return IPT_CONTINUE;
+}
+
+static int
+checkentry(const char *tablename,
+           const struct ipt_entry *e,
+           void *targinfo,
+           unsigned int targinfosize,
+           unsigned int hook_mask)
+{
+	if (targinfosize != IPT_ALIGN(sizeof(struct ipt_classify_target_info))){
+		printk(KERN_ERR "CLASSIFY: invalid size (%u != %u).\n",
+		       targinfosize,
+		       IPT_ALIGN(sizeof(struct ipt_classify_target_info)));
+		return 0;
+	}
+	
+	if (hook_mask & ~(1 << NF_IP_POST_ROUTING)) {
+		printk(KERN_ERR "CLASSIFY: only valid in POST_ROUTING.\n");
+		return 0;
+	}
+
+	if (strcmp(tablename, "mangle") != 0) {
+		printk(KERN_WARNING "CLASSIFY: can only be called from "
+		                    "\"mangle\" table, not \"%s\".\n",
+		                    tablename);
+		return 0;
+	}
+
+	return 1;
+}
+
+static struct ipt_target ipt_classify_reg
+= { { NULL, NULL }, "CLASSIFY", target, checkentry, NULL, THIS_MODULE };
+
+static int __init init(void)
+{
+	if (ipt_register_target(&ipt_classify_reg))
+		return -EINVAL;
+
+	return 0;
+}
+
+static void __exit fini(void)
+{
+	ipt_unregister_target(&ipt_classify_reg);
+}
+
+module_init(init);
+module_exit(fini);
Index: linux-2.4.35.4/net/ipv4/netfilter/Makefile
===================================================================
--- linux-2.4.35.4.orig/net/ipv4/netfilter/Makefile	2007-12-15 05:20:11.216479434 +0100
+++ linux-2.4.35.4/net/ipv4/netfilter/Makefile	2007-12-15 05:20:11.696506789 +0100
@@ -134,6 +134,7 @@
 
 # targets
 obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
+obj-$(CONFIG_IP_NF_TARGET_CLASSIFY) += ipt_CLASSIFY.o
 obj-$(CONFIG_IP_NF_TARGET_MIRROR) += ipt_MIRROR.o
 obj-$(CONFIG_IP_NF_TARGET_TOS) += ipt_TOS.o
 obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o