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The C and C++ Include Header Files

/usr/include/linux/netfilter_ipv6/ip6t_NPT.h

$ cat -n /usr/include/linux/netfilter_ipv6/ip6t_NPT.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef __NETFILTER_IP6T_NPT
     3	#define __NETFILTER_IP6T_NPT
     4	
     5	#include <linux/types.h>
     6	#include <linux/netfilter.h>
     7	
     8	struct ip6t_npt_tginfo {
     9		union nf_inet_addr	src_pfx;
    10		union nf_inet_addr	dst_pfx;
    11		__u8			src_pfx_len;
    12		__u8			dst_pfx_len;
    13		/* Used internally by the kernel */
    14		__sum16			adjustment;
    15	};
    16	
    17	#endif /* __NETFILTER_IP6T_NPT */

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