fix CLUSTERIP rule deletion in iptables

Index: include/linux/netfilter_ipv4/ipt_CLUSTERIP.h
===================================================================
@@ -0,0 +1,37 @@
+#ifndef _IPT_CLUSTERIP_H_target
+#define _IPT_CLUSTERIP_H_target
+
+enum clusterip_hashmode {
+    CLUSTERIP_HASHMODE_SIP = 0,
+    CLUSTERIP_HASHMODE_SIP_SPT,
+    CLUSTERIP_HASHMODE_SIP_SPT_DPT,
+};
+
+#define CLUSTERIP_HASHMODE_MAX CLUSTERIP_HASHMODE_SIP_SPT_DPT
+
+#define CLUSTERIP_MAX_NODES 16
+
+#define CLUSTERIP_FLAG_NEW 0x00000001
+
+struct clusterip_config;
+
+struct ipt_clusterip_tgt_info {
+
+	u_int32_t flags;
+	
+	/* only relevant for new ones */
+	u_int8_t clustermac[6];
+	u_int16_t num_total_nodes;
+	u_int16_t num_local_nodes;
+	u_int16_t local_nodes[CLUSTERIP_MAX_NODES];
+	enum clusterip_hashmode hash_mode;
+	u_int32_t hash_initval;
+	
+#ifdef KERNEL_64_USERSPACE_32
+	u_int64_t config;
+#else
+	struct clusterip_config *config;
+#endif
+};
+
+#endif /*_IPT_CLUSTERIP_H_target*/

Index: extensions/libipt_CLUSTERIP.c
===================================================================
@@ -7,6 +7,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <getopt.h>
+#include <stddef.h>
 
 #if defined(__GLIBC__) && __GLIBC__ == 2
 #include <net/ethernet.h>

@@ -16,7 +17,7 @@
 
 #include <iptables.h>
 #include <linux/netfilter_ipv4/ip_tables.h>
-#include <linux/netfilter_ipv4/ipt_CLUSTERIP.h>
+#include "../include/linux/netfilter_ipv4/ipt_CLUSTERIP.h"
 
 static void
 help(void)

@@ -242,7 +243,7 @@
 	.name		= "CLUSTERIP",
 	.version	= IPTABLES_VERSION,
 	.size		= IPT_ALIGN(sizeof(struct ipt_clusterip_tgt_info)),
-	.userspacesize	= IPT_ALIGN(sizeof(struct ipt_clusterip_tgt_info)),
+	.userspacesize	= offsetof(struct ipt_clusterip_tgt_info, config),
  	.help		= &help,
 	.init		= &init,
 	.parse		= &parse,