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