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 28 struct 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