#ifndef _ARPT_MANGLE_H
  #define _ARPT_MANGLE_H
  #include <linux/netfilter_arp/arp_tables.h>
  
  #define ARPT_MANGLE_ADDR_LEN_MAX sizeof(struct in_addr)
  struct arpt_mangle
  {
  	char src_devaddr[ARPT_DEV_ADDR_LEN_MAX];
  	char tgt_devaddr[ARPT_DEV_ADDR_LEN_MAX];
  	union {
  		struct in_addr src_ip;
  	} u_s;
  	union {
  		struct in_addr tgt_ip;
  	} u_t;
  	u_int8_t flags;
  	int target;
  };
  
  #define ARPT_MANGLE_SDEV 0x01
  #define ARPT_MANGLE_TDEV 0x02
  #define ARPT_MANGLE_SIP 0x04
  #define ARPT_MANGLE_TIP 0x08
  #define ARPT_MANGLE_MASK 0x0f
  
  #endif /* _ARPT_MANGLE_H */