The C and C++ Include Header Files

/usr/include/linux/netfilter/xt_policy.h


$ cat -n /usr/include/linux/netfilter/xt_policy.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _XT_POLICY_H
     3	#define _XT_POLICY_H
     4	
     5	#include <linux/netfilter.h>
     6	#include <linux/types.h>
     7	#include <linux/in.h>
     8	#include <linux/in6.h>
     9	
    10	#define XT_POLICY_MAX_ELEM	4
    11	
    12	enum xt_policy_flags {
    13		XT_POLICY_MATCH_IN	= 0x1,
    14		XT_POLICY_MATCH_OUT	= 0x2,
    15		XT_POLICY_MATCH_NONE	= 0x4,
    16		XT_POLICY_MATCH_STRICT	= 0x8,
    17	};
    18	
    19	enum xt_policy_modes {
    20		XT_POLICY_MODE_TRANSPORT,
    21		XT_POLICY_MODE_TUNNEL
    22	};
    23	
    24	struct xt_policy_spec {
    25		__u8	saddr:1,
    26				daddr:1,
    27				proto:1,
    28				mode:1,
    29				spi:1,
    30				reqid:1;
    31	};
    32	
    33	union xt_policy_addr {
    34		struct in_addr	a4;
    35		struct in6_addr	a6;
    36	};
    37	
    38	struct xt_policy_elem {
    39		union {
    40			struct {
    41				union xt_policy_addr saddr;
    42				union xt_policy_addr smask;
    43				union xt_policy_addr daddr;
    44				union xt_policy_addr dmask;
    45			};
    46		};
    47		__be32			spi;
    48		__u32		reqid;
    49		__u8		proto;
    50		__u8		mode;
    51	
    52		struct xt_policy_spec	match;
    53		struct xt_policy_spec	invert;
    54	};
    55	
    56	struct xt_policy_info {
    57		struct xt_policy_elem pol[XT_POLICY_MAX_ELEM];
    58		__u16 flags;
    59		__u16 len;
    60	};
    61	
    62	#endif /* _XT_POLICY_H */