1/* $NetBSD: if_tun.h,v 1.5 1994/06/29 06:36:27 cgd Exp $ */ 2 3/*- 4 * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk> 5 * Nottingham University 1987. 6 * 7 * This source may be freely distributed, however I would be interested 8 * in any changes that are made. 9 * 10 * This driver takes packets off the IP i/f and hands them up to a 11 * user process to have its wicked way with. This driver has it's 12 * roots in a similar driver written by Phil Cockcroft (formerly) at 13 * UCL. This driver is based much more on read/write/select mode of 14 * operation though. 15 * 16 * $FreeBSD$ 17 */ 18 19#ifndef _NET_IF_TUN_H_ 20#define _NET_IF_TUN_H_ 21 22/* Refer to if_tunvar.h for the softc stuff */ 23 24/* Maximum transmit packet size (default) */ 25#define TUNMTU 1500 26 27/* Maximum receive packet size (hard limit) */ 28#define TUNMRU 65535 29 30struct tuninfo { 31 int baudrate; /* linespeed */ 32 unsigned short mtu; /* maximum transmission unit */ 33 u_char type; /* ethernet, tokenring, etc. */ 34 u_char dummy; /* place holder */ 35}; 36 37/* ioctl's for get/set debug */ 38#define TUNSDEBUG _IOW('t', 90, int) 39#define TUNGDEBUG _IOR('t', 89, int) 40#define TUNSIFINFO _IOW('t', 91, struct tuninfo) 41#define TUNGIFINFO _IOR('t', 92, struct tuninfo) 42#define TUNSLMODE _IOW('t', 93, int) 43#define TUNGIFNAME _IOR('t', 93, struct ifreq) 44#define TUNSIFMODE _IOW('t', 94, int) 45#define TUNSIFPID _IO('t', 95) 46#define TUNSIFHEAD _IOW('t', 96, int) 47#define TUNGIFHEAD _IOR('t', 97, int) 48 49#endif /* !_NET_IF_TUN_H_ */ 50