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      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_ */
     57