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The C and C++ Include Header Files

cat -n /usr/include/linux/ipv6_route.h

     1	/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
     2	/*
     3	 *	Linux INET6 implementation 
     4	 *
     5	 *	Authors:
     6	 *	Pedro Roque		<roque@di.fc.ul.pt>	
     7	 *
     8	 *	This program is free software; you can redistribute it and/or
     9	 *      modify it under the terms of the GNU General Public License
    10	 *      as published by the Free Software Foundation; either version
    11	 *      2 of the License, or (at your option) any later version.
    12	 */
    13	
    14	#ifndef _LINUX_IPV6_ROUTE_H
    15	#define _LINUX_IPV6_ROUTE_H
    16	
    17	#include <linux/types.h>
    18	#include <linux/in6.h>			/* For struct in6_addr. */
    19	
    20	#define RTF_DEFAULT	0x00010000	/* default - learned via ND	*/
    21	#define RTF_ALLONLINK	0x00020000	/* (deprecated and will be removed)
    22						   fallback, no routers on link */
    23	#define RTF_ADDRCONF	0x00040000	/* addrconf route - RA		*/
    24	#define RTF_PREFIX_RT	0x00080000	/* A prefix only route - RA	*/
    25	#define RTF_ANYCAST	0x00100000	/* Anycast			*/
    26	
    27	#define RTF_NONEXTHOP	0x00200000	/* route with no nexthop	*/
    28	#define RTF_EXPIRES	0x00400000
    29	
    30	#define RTF_ROUTEINFO	0x00800000	/* route information - RA	*/
    31	
    32	#define RTF_CACHE	0x01000000	/* read-only: can not be set by user */
    33	#define RTF_FLOW	0x02000000	/* flow significant route	*/
    34	#define RTF_POLICY	0x04000000	/* policy route			*/
    35	
    36	#define RTF_PREF(pref)	((pref) << 27)
    37	#define RTF_PREF_MASK	0x18000000
    38	
    39	#define RTF_PCPU	0x40000000	/* read-only: can not be set by user */
    40	#define RTF_LOCAL	0x80000000
    41	
    42	
    43	struct in6_rtmsg {
    44		struct in6_addr		rtmsg_dst;
    45		struct in6_addr		rtmsg_src;
    46		struct in6_addr		rtmsg_gateway;
    47		__u32			rtmsg_type;
    48		__u16			rtmsg_dst_len;
    49		__u16			rtmsg_src_len;
    50		__u32			rtmsg_metric;
    51		unsigned long		rtmsg_info;
    52	        __u32			rtmsg_flags;
    53		int			rtmsg_ifindex;
    54	};
    55	
    56	#define RTMSG_NEWDEVICE		0x11
    57	#define RTMSG_DELDEVICE		0x12
    58	#define RTMSG_NEWROUTE		0x21
    59	#define RTMSG_DELROUTE		0x22
    60	
    61	#define IP6_RT_PRIO_USER	1024
    62	#define IP6_RT_PRIO_ADDRCONF	256
    63	
    64	#endif /* _LINUX_IPV6_ROUTE_H */