The C and C++ Include Header Files

/usr/include/linux/route.h


$ cat -n /usr/include/linux/route.h

     1	/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
     2	/*
     3	 * INET		An implementation of the TCP/IP protocol suite for the LINUX
     4	 *		operating system.  INET is implemented using the  BSD Socket
     5	 *		interface as the means of communication with the user level.
     6	 *
     7	 *		Global definitions for the IP router interface.
     8	 *
     9	 * Version:	@(#)route.h	1.0.3	05/27/93
    10	 *
    11	 * Authors:	Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
    12	 *		for the purposes of compatibility only.
    13	 *
    14	 *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
    15	 *
    16	 * Changes:
    17	 *              Mike McLagan    :       Routing by source
    18	 *
    19	 *		This program is free software; you can redistribute it and/or
    20	 *		modify it under the terms of the GNU General Public License
    21	 *		as published by the Free Software Foundation; either version
    22	 *		2 of the License, or (at your option) any later version.
    23	 */
    24	#ifndef _LINUX_ROUTE_H
    25	#define _LINUX_ROUTE_H
    26	
    27	#include <linux/if.h>
    28	
    29	
    30	/* This structure gets passed by the SIOCADDRT and SIOCDELRT calls. */
    31	struct rtentry {
    32		unsigned long	rt_pad1;
    33		struct sockaddr	rt_dst;		/* target address		*/
    34		struct sockaddr	rt_gateway;	/* gateway addr (RTF_GATEWAY)	*/
    35		struct sockaddr	rt_genmask;	/* target network mask (IP)	*/
    36		unsigned short	rt_flags;
    37		short		rt_pad2;
    38		unsigned long	rt_pad3;
    39		void		*rt_pad4;
    40		short		rt_metric;	/* +1 for binary compatibility!	*/
    41		char *rt_dev;	/* forcing the device at add	*/
    42		unsigned long	rt_mtu;		/* per route MTU/Window 	*/
    43	#define rt_mss	rt_mtu			/* Compatibility :-(            */
    44		unsigned long	rt_window;	/* Window clamping 		*/
    45		unsigned short	rt_irtt;	/* Initial RTT			*/
    46	};
    47	
    48	
    49	#define	RTF_UP		0x0001		/* route usable		  	*/
    50	#define	RTF_GATEWAY	0x0002		/* destination is a gateway	*/
    51	#define	RTF_HOST	0x0004		/* host entry (net otherwise)	*/
    52	#define RTF_REINSTATE	0x0008		/* reinstate route after tmout	*/
    53	#define	RTF_DYNAMIC	0x0010		/* created dyn. (by redirect)	*/
    54	#define	RTF_MODIFIED	0x0020		/* modified dyn. (by redirect)	*/
    55	#define RTF_MTU		0x0040		/* specific MTU for this route	*/
    56	#define RTF_MSS		RTF_MTU		/* Compatibility :-(		*/
    57	#define RTF_WINDOW	0x0080		/* per route window clamping	*/
    58	#define RTF_IRTT	0x0100		/* Initial round trip time	*/
    59	#define RTF_REJECT	0x0200		/* Reject route			*/
    60	
    61	/*
    62	 *	<linux/ipv6_route.h> uses RTF values >= 64k
    63	 */
    64	
    65	
    66	
    67	#endif	/* _LINUX_ROUTE_H */
    68