a186cbef4e
tells that tun unit to prepend a four byte address family to packets queued for tunread() and to expect a four byte address family at the front of data received by tunwrite(). We queue any protocol received from the interface for tunread(), but only accept INET, INET6, IPX and NETATALK from tunwrite(). There is support for Xerox's NS stuff, but AFAICT config(8) doesn't ever define NS.
49 lines
1.4 KiB
C
49 lines
1.4 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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* $FreeBSD$
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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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#define TUNSLMODE _IOW('t', 93, int)
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#define TUNSIFMODE _IOW('t', 94, int)
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#define TUNSIFPID _IO('t', 95)
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#define TUNSIFHEAD _IOW('t', 96, int)
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#define TUNGIFHEAD _IOR('t', 97, int)
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#endif /* !_NET_IF_TUN_H_ */
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