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The C and C++ Include Header Files

/usr/include/linux/netfilter/xt_time.h

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

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _XT_TIME_H
     3	#define _XT_TIME_H 1
     4	
     5	#include <linux/types.h>
     6	
     7	struct xt_time_info {
     8		__u32 date_start;
     9		__u32 date_stop;
    10		__u32 daytime_start;
    11		__u32 daytime_stop;
    12		__u32 monthdays_match;
    13		__u8 weekdays_match;
    14		__u8 flags;
    15	};
    16	
    17	enum {
    18		/* Match against local time (instead of UTC) */
    19		XT_TIME_LOCAL_TZ = 1 << 0,
    20	
    21		/* treat timestart > timestop (e.g. 23:00-01:00) as single period */
    22		XT_TIME_CONTIGUOUS = 1 << 1,
    23	
    24		/* Shortcuts */
    25		XT_TIME_ALL_MONTHDAYS = 0xFFFFFFFE,
    26		XT_TIME_ALL_WEEKDAYS  = 0xFE,
    27		XT_TIME_MIN_DAYTIME   = 0,
    28		XT_TIME_MAX_DAYTIME   = 24 * 60 * 60 - 1,
    29	};
    30	
    31	#define XT_TIME_ALL_FLAGS (XT_TIME_LOCAL_TZ|XT_TIME_CONTIGUOUS)
    32	
    33	#endif /* _XT_TIME_H */

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