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 17#ifndef _NET_IF_TUN_H_ 18#define _NET_IF_TUN_H_ 19 20/* Refer to if_tunvar.h for the softc stuff */ 21 22/* Maximum transmit packet size (default) */ 23#define TUNMTU 1500 24 25/* Maximum receive packet size (hard limit) */ 26#define TUNMRU 65535 27 28struct tuninfo { 29 int baudrate; /* linespeed */ 30 unsigned short mtu; /* maximum transmission unit */ 31 u_char type; /* ethernet, tokenring, etc. */ 32 u_char dummy; /* place holder */ 33}; 34 35/* ioctl's for get/set debug */ 36#define TUNSDEBUG _IOW('t', 90, int) 37#define TUNGDEBUG _IOR('t', 89, int) 38#define TUNSIFINFO _IOW('t', 91, struct tuninfo) 39#define TUNGIFINFO _IOR('t', 92, struct tuninfo) 40#define TUNSLMODE _IOW('t', 93, int) 41#define TUNGIFNAME _IOR('t', 93, struct ifreq) 42#define TUNSIFMODE _IOW('t', 94, int) 43#define TUNSIFPID _IO('t', 95) 44#define TUNSIFHEAD _IOW('t', 96, int) 45#define TUNGIFHEAD _IOR('t', 97, int) 46 47#endif /* !_NET_IF_TUN_H_ */ 48