root/include/uapi/linux/netfilter_ipv6/ip6t_NPT.h

#ifndef __NETFILTER_IP6T_NPT
#define __NETFILTER_IP6T_NPT

#include <linux/types.h>
#include <linux/netfilter.h>

struct ip6t_npt_tginfo {
        union nf_inet_addr      src_pfx;
        union nf_inet_addr      dst_pfx;
        __u8                    src_pfx_len;
        __u8                    dst_pfx_len;
        /* Used internally by the kernel */
        __sum16                 adjustment;
};

#endif /* __NETFILTER_IP6T_NPT */