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[apple/xnu.git] / bsd / net / if_slvar.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)if_slvar.h	8.3 (Berkeley) 2/1/94
 *
 */

#ifndef _NET_IF_SLVAR_H_
#define _NET_IF_SLVAR_H_
#include <sys/appleapiopts.h>

#ifndef DONT_WARN_OBSOLETE
#warning if_slvar.h is not used by the darwin kernel
#endif

#include <sys/callout.h>
#include <sys/mbuf.h>
#include <net/slcompress.h>

#ifdef __APPLE_API_PRIVATE

/*
 * Definitions for SLIP interface data structures
 *
 * (This exists so programs like slstats can get at the definition
 *  of sl_softc.)
 */
struct sl_softc {
	struct	ifnet sc_if;		/* network-visible interface */
	struct	ifqueue sc_fastq;	/* interactive output queue */
	struct	tty *sc_ttyp;		/* pointer to tty structure */
	u_char	*sc_mp;			/* pointer to next available buf char */
	u_char	*sc_ep;			/* pointer to last available buf char */
	u_char	*sc_buf;		/* input buffer */
	u_int	sc_flags;		/* see below */
	u_int	sc_escape;	/* =1 if last char input was FRAME_ESCAPE */
	long	sc_lasttime;		/* last time a char arrived */
	long	sc_abortcount;		/* number of abort escape chars */
	long	sc_starttime;		/* time of first abort in window */
	u_int	sc_keepalive;		/* time	to decide link hang */
	u_int	sc_outfill;	/* time	to send	FRAME_END when output idle */
					/*
					 * Handles for scheduling outfill and
					 * keepalive timeouts.
					 */
#if FB3x
	struct	callout_handle	sc_ofhandle;
	struct	callout_handle	sc_kahandle;
#endif
	struct	slcompress sc_comp;	/* tcp compression data */
};

/* internal flags */
#define	SC_ERROR	0x0001		/* had an input error */
#define	SC_OUTWAIT	0x0002		/* waiting for output fill */
#define	SC_KEEPALIVE	0x0004		/* input keepalive */
#define SC_STATIC       0x0008          /* it is static unit */

/* visible flags */
#define	SC_COMPRESS	IFF_LINK0	/* compress TCP traffic */
#define	SC_NOICMP	IFF_LINK1	/* suppress ICMP traffic */
#define	SC_AUTOCOMP	IFF_LINK2	/* auto-enable TCP compression */

#endif /* __APPLE_API_PRIVATE */
#endif