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44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/* $NetBSD: if_tun.h,v 1.5 1994/06/29 06:36:27 cgd Exp $ */
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/*
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* Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
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* Nottingham University 1987.
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*
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* This source may be freely distributed, however I would be interested
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* in any changes that are made.
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*
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* This driver takes packets off the IP i/f and hands them up to a
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* user process to have its wicked way with. This driver has it's
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* roots in a similar driver written by Phil Cockcroft (formerly) at
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* UCL. This driver is based much more on read/write/select mode of
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* operation though.
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*
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* $Id: if_tun.h,v 1.12 1998/01/26 19:52:34 brian Exp $
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*/
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#ifndef _NET_IF_TUN_H_
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#define _NET_IF_TUN_H_
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/* Refer to if_tunvar.h for the softc stuff */
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/* Maximum transmit packet size (default) */
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#define TUNMTU 1500
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/* Maximum receive packet size (hard limit) */
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#define TUNMRU 16384
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struct tuninfo {
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int baudrate; /* linespeed */
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short mtu; /* maximum transmission unit */
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u_char type; /* ethernet, tokenring, etc. */
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u_char dummy; /* place holder */
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};
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/* ioctl's for get/set debug */
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#define TUNSDEBUG _IOW('t', 90, int)
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#define TUNGDEBUG _IOR('t', 89, int)
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#define TUNSIFINFO _IOW('t', 91, struct tuninfo)
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#define TUNGIFINFO _IOR('t', 92, struct tuninfo)
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#endif /* !_NET_IF_TUN_H_ */
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