1/*	$NetBSD: slip.h,v 1.10 2015/09/06 06:01:01 dholland Exp $	*/
 2
 3/*-
 4 * Copyright (c) 1994
 5 *	The Regents of the University of California.  All rights reserved.
 6 *
 7 * Redistribution and use in source and binary forms, with or without
 8 * modification, are permitted provided that the following conditions
 9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 *	@(#)slip.h	8.1 (Berkeley) 2/12/94
32 */
33
34#ifndef _NET_SLIP_H_
35#define _NET_SLIP_H_
36
37#include <sys/ioccom.h>
38
39/* Ioctls operating on SLIP ttys. */
40#define	SLIOCGUNIT	_IOR('t', 88, int)	/* get slip unit number */
41
42/*
43 * Definitions of the pseudo-link-level header attached to slip
44 * packets grabbed by the packet filter (bpf) traffic monitor.
45 */
46#define	SLIP_HDRLEN	16		/* BPF SLIP header length */
47
48/* Offsets into BPF SLIP header. */
49#define	SLX_DIR		0		/* direction; see below */
50#define	SLX_CHDR	1		/* compressed header data */
51#define	CHDR_LEN	15		/* length of compressed header data */
52
53#define	SLIPDIR_IN	0		/* incoming */
54#define	SLIPDIR_OUT	1		/* outgoing */
55
56#endif /* !_NET_SLIP_H_ */