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c812f23a41
Use the interface MTU instead of the constant when deciding what packets to accept. Allow using the SIOCSIFMTU ioctl (e.g. "ifconfig tun0 mtu XXX") to set the MTU.
58 lines
1.6 KiB
C
58 lines
1.6 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 it's 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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* : $Header: if_tnreg.h,v 1.1.2.1 1992/07/16 22:39:16 friedl 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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struct tun_softc {
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u_short tun_flags; /* misc flags */
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#define TUN_OPEN 0x0001
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#define TUN_INITED 0x0002
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#define TUN_RCOLL 0x0004
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#define TUN_IASET 0x0008
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#define TUN_DSTADDR 0x0010
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#define TUN_RWAIT 0x0040
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#define TUN_ASYNC 0x0080
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#define TUN_NBIO 0x0100
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#define TUN_READY (TUN_OPEN | TUN_INITED)
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struct ifnet tun_if; /* the interface */
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int tun_pgrp; /* the process group - if any */
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struct selinfo tun_rsel; /* read select */
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struct selinfo tun_wsel; /* write select (not used) */
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};
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/* Default maximum packet size */
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#define TUNMTU 1500
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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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