8022bba3f4
so don't enforce the MTU as an MRU. Allow bidirectional ppp MTU negotiation, by checking against a differnt figure for MRU. Make it large enough for ATM frames at least. Submitted by: archie@whistle.com (archie cobbs)
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/* $NetBSD: if_tun.h,v 1.5 1994/06/29 06:36:27 cgd Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
|
|
* Nottingham University 1987.
|
|
*
|
|
* This source may be freely distributed, however I would be interested
|
|
* in any changes that are made.
|
|
*
|
|
* This driver takes packets off the IP i/f and hands them up to a
|
|
* user process to have it's wicked way with. This driver has it's
|
|
* roots in a similar driver written by Phil Cockcroft (formerly) at
|
|
* UCL. This driver is based much more on read/write/select mode of
|
|
* operation though.
|
|
*
|
|
* : $Header: if_tnreg.h,v 1.1.2.1 1992/07/16 22:39:16 friedl Exp
|
|
*/
|
|
|
|
#ifndef _NET_IF_TUN_H_
|
|
#define _NET_IF_TUN_H_
|
|
|
|
struct tun_softc {
|
|
u_short tun_flags; /* misc flags */
|
|
#define TUN_OPEN 0x0001
|
|
#define TUN_INITED 0x0002
|
|
#define TUN_RCOLL 0x0004
|
|
#define TUN_IASET 0x0008
|
|
#define TUN_DSTADDR 0x0010
|
|
#define TUN_RWAIT 0x0040
|
|
#define TUN_ASYNC 0x0080
|
|
#define TUN_NBIO 0x0100
|
|
|
|
#define TUN_READY (TUN_OPEN | TUN_INITED)
|
|
|
|
struct ifnet tun_if; /* the interface */
|
|
int tun_pgrp; /* the process group - if any */
|
|
struct selinfo tun_rsel; /* read select */
|
|
struct selinfo tun_wsel; /* write select (not used) */
|
|
};
|
|
|
|
/* Maximum transmit packet size (default) */
|
|
#define TUNMTU 1500
|
|
|
|
/* Maximum receive packet size (hard limit) */
|
|
#define TUNMRU 16384
|
|
|
|
struct tuninfo {
|
|
int baudrate; /* linespeed */
|
|
short mtu; /* maximum transmission unit */
|
|
u_char type; /* ethernet, tokenring, etc. */
|
|
u_char dummy; /* place holder */
|
|
};
|
|
|
|
/* ioctl's for get/set debug */
|
|
#define TUNSDEBUG _IOW('t', 90, int)
|
|
#define TUNGDEBUG _IOR('t', 89, int)
|
|
#define TUNSIFINFO _IOW('t', 91, struct tuninfo)
|
|
#define TUNGIFINFO _IOR('t', 92, struct tuninfo)
|
|
|
|
#endif /* !_NET_IF_TUN_H_ */
|