root/include/linux/route.h

INCLUDED FROM

/*
 * INET         An implementation of the TCP/IP protocol suite for the LINUX
 *              operating system.  INET is implemented using the  BSD Socket
 *              interface as the means of communication with the user level.
 *
 *              Global definitions for the IP router interface.
 *
 * Version:     @(#)route.h     1.0.3   05/27/93
 *
 * Authors:     Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
 *              for the purposes of compatibility only.
 *
 *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *
 * Changes:
 *              Mike McLagan    :       Routing by source
 *
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 */
#ifndef _LINUX_ROUTE_H
#define _LINUX_ROUTE_H

#include <linux/if.h>
#include <linux/compiler.h>

/* This structure gets passed by the SIOCADDRT and SIOCDELRT calls. */
struct rtentry 
{
        unsigned long   rt_pad1;
        struct sockaddr rt_dst;         /* target address               */
        struct sockaddr rt_gateway;     /* gateway addr (RTF_GATEWAY)   */
        struct sockaddr rt_genmask;     /* target network mask (IP)     */
        unsigned short  rt_flags;
        short           rt_pad2;
        unsigned long   rt_pad3;
        void            *rt_pad4;
        short           rt_metric;      /* +1 for binary compatibility! */
        char __user     *rt_dev;        /* forcing the device at add    */
        unsigned long   rt_mtu;         /* per route MTU/Window         */
#ifndef __KERNEL__
#define rt_mss  rt_mtu                  /* Compatibility :-(            */
#endif
        unsigned long   rt_window;      /* Window clamping              */
        unsigned short  rt_irtt;        /* Initial RTT                  */
};


#define RTF_UP          0x0001          /* route usable                 */
#define RTF_GATEWAY     0x0002          /* destination is a gateway     */
#define RTF_HOST        0x0004          /* host entry (net otherwise)   */
#define RTF_REINSTATE   0x0008          /* reinstate route after tmout  */
#define RTF_DYNAMIC     0x0010          /* created dyn. (by redirect)   */
#define RTF_MODIFIED    0x0020          /* modified dyn. (by redirect)  */
#define RTF_MTU         0x0040          /* specific MTU for this route  */
#define RTF_MSS         RTF_MTU         /* Compatibility :-(            */
#define RTF_WINDOW      0x0080          /* per route window clamping    */
#define RTF_IRTT        0x0100          /* Initial round trip time      */
#define RTF_REJECT      0x0200          /* Reject route                 */

/*
 *      <linux/ipv6_route.h> uses RTF values >= 64k
 */



#endif  /* _LINUX_ROUTE_H */