/*-
 * Copyright (c) 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)slip.h	8.1 (Berkeley) 02/12/94
 */

/* Ioctls operating on SLIP ttys. */
#define	SLIOCGUNIT	_IOR('t', 88, int)	/* get slip unit number */

/*
 * Definitions of the pseudo-link-level header attached to slip
 * packets grabbed by the packet filter (bpf) traffic monitor.
 */
#define	SLIP_HDRLEN	16		/* BPF SLIP header length */

/* Offsets into BPF SLIP header. */
#define	SLX_DIR		0		/* direction; see below */
#define	SLX_CHDR	1		/* compressed header data */
#define	CHDR_LEN	15		/* length of compressed header data */

#define	SLIPDIR_IN	0		/* incoming */
#define	SLIPDIR_OUT	1		/* outgoing */