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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */2/*3 * INET An implementation of the TCP/IP protocol suite for the LINUX4 * operating system. INET is implemented using the BSD Socket5 * 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 05/27/9310 *11 * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-198812 * 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 source18 *19 * This program is free software; you can redistribute it and/or20 * modify it under the terms of the GNU General Public License21 * as published by the Free Software Foundation; either version22 * 2 of the License, or (at your option) any later version.23 */24#ifndef _LINUX_ROUTE_H25#define _LINUX_ROUTE_H26 27#include <linux/if.h>28#include <linux/compiler.h>29 30/* This structure gets passed by the SIOCADDRT and SIOCDELRT calls. */31struct 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 __user *rt_dev; /* forcing the device at add */42 unsigned long rt_mtu; /* per route MTU/Window */43#ifndef __KERNEL__44#define rt_mss rt_mtu /* Compatibility :-( */45#endif46 unsigned long rt_window; /* Window clamping */47 unsigned short rt_irtt; /* Initial RTT */48};49 50 51#define RTF_UP 0x0001 /* route usable */52#define RTF_GATEWAY 0x0002 /* destination is a gateway */53#define RTF_HOST 0x0004 /* host entry (net otherwise) */54#define RTF_REINSTATE 0x0008 /* reinstate route after tmout */55#define RTF_DYNAMIC 0x0010 /* created dyn. (by redirect) */56#define RTF_MODIFIED 0x0020 /* modified dyn. (by redirect) */57#define RTF_MTU 0x0040 /* specific MTU for this route */58#define RTF_MSS RTF_MTU /* Compatibility :-( */59#define RTF_WINDOW 0x0080 /* per route window clamping */60#define RTF_IRTT 0x0100 /* Initial round trip time */61#define RTF_REJECT 0x0200 /* Reject route */62 63/*64 * <linux/ipv6_route.h> uses RTF values >= 64k65 */66 67 68 69#endif /* _LINUX_ROUTE_H */70 71