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 (at) 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 #include <linux/compiler.h> 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 __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 #endif 46 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 >= 64k 65 */ 66 67 68 69 #endif /* _LINUX_ROUTE_H */ 70 71
