route.h

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/*
 * 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, <[email protected]>
 *
 * 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 */