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The C and C++ Include Header Files

cat -n /usr/include/linux/netfilter_bridge/ebt_log.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef __LINUX_BRIDGE_EBT_LOG_H
     3	#define __LINUX_BRIDGE_EBT_LOG_H
     4	
     5	#include <linux/types.h>
     6	
     7	#define EBT_LOG_IP 0x01 /* if the frame is made by ip, log the ip information */
     8	#define EBT_LOG_ARP 0x02
     9	#define EBT_LOG_NFLOG 0x04
    10	#define EBT_LOG_IP6 0x08
    11	#define EBT_LOG_MASK (EBT_LOG_IP | EBT_LOG_ARP | EBT_LOG_IP6)
    12	#define EBT_LOG_PREFIX_SIZE 30
    13	#define EBT_LOG_WATCHER "log"
    14	
    15	struct ebt_log_info {
    16		__u8 loglevel;
    17		__u8 prefix[EBT_LOG_PREFIX_SIZE];
    18		__u32 bitmask;
    19	};
    20	
    21	#endif