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if_slvar.h revision 1.17 
      1 /*	$NetBSD: if_slvar.h,v 1.17 1997/03/27 20:36:17 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1991, 1993
      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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)if_slvar.h	8.3 (Berkeley) 2/1/94
     36  */
     37 
     38 /*
     39  * Definitions for SLIP interface data structures
     40  *
     41  * (This exists so programs like slstats can get at the definition
     42  *  of sl_softc.)
     43  */
     44 struct sl_softc {
     45 	struct	ifnet sc_if;		/* network-visible interface */
     46 	int	sc_unit;		/* XXX unit number */
     47 	struct	ifqueue sc_fastq;	/* interactive output queue */
     48 	struct	tty *sc_ttyp;		/* pointer to tty structure */
     49 	u_char	*sc_mp;			/* pointer to next available buf char */
     50 	u_char	*sc_ep;			/* pointer to last available buf char */
     51 	u_char	*sc_buf;		/* input buffer */
     52 	u_char	*sc_xxx;		/* XXX don't ask... */
     53 	u_int	sc_flags;		/* see below */
     54 	u_int	sc_escape;	/* =1 if last char input was FRAME_ESCAPE */
     55 	long	sc_lasttime;		/* last time a char arrived */
     56 	long	sc_abortcount;		/* number of abort esacpe chars */
     57 	long	sc_starttime;		/* time of first abort in window */
     58 	long	sc_oqlen;		/* previous output queue size */
     59 	long	sc_otimeout;		/* number of times output's stalled */
     60 #ifdef NetBSD
     61 	int	sc_oldbufsize;		/* previous output buffer size */
     62 	int	sc_oldbufquot;		/* previous output buffer quoting */
     63 #endif
     64 #ifdef INET				/* XXX */
     65 	struct	slcompress sc_comp;	/* tcp compression data */
     66 #endif
     67 	caddr_t	sc_bpf;			/* BPF data */
     68 };
     69 
     70 /* internal flags */
     71 #define	SC_ERROR	0x0001		/* had an input error */
     72 
     73 /* visible flags */
     74 #define	SC_COMPRESS	IFF_LINK0	/* compress TCP traffic */
     75 #define	SC_NOICMP	IFF_LINK1	/* supress ICMP traffic */
     76 #define	SC_AUTOCOMP	IFF_LINK2	/* auto-enable TCP compression */
     77 
     78 #ifdef _KERNEL
     79 void	slattach __P((void));
     80 void	slclose __P((struct tty *));
     81 void	slinput __P((int, struct tty *));
     82 int	slioctl __P((struct ifnet *, u_long, caddr_t));
     83 int	slopen __P((dev_t, struct tty *));
     84 int	sloutput __P((struct ifnet *,
     85 	    struct mbuf *, struct sockaddr *, struct rtentry *));
     86 void	slstart __P((struct tty *));
     87 int	sltioctl __P((struct tty *, u_long, caddr_t, int));
     88 #endif /* _KERNEL */
     89