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if_slvar.h revision 1.11 
      1 /*-
      2  * Copyright (c) 1991, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	from: @(#)if_slvar.h	8.3 (Berkeley) 2/1/94
     34  *	$Id: if_slvar.h,v 1.11 1994/05/13 06:02:56 mycroft Exp $
     35  */
     36 
     37 /*
     38  * Definitions for SLIP interface data structures
     39  *
     40  * (This exists so programs like slstats can get at the definition
     41  *  of sl_softc.)
     42  */
     43 struct sl_softc {
     44 	struct	ifnet sc_if;		/* network-visible interface */
     45 	struct	ifqueue sc_fastq;	/* interactive output queue */
     46 	struct	tty *sc_ttyp;		/* pointer to tty structure */
     47 	u_char	*sc_mp;			/* pointer to next available buf char */
     48 	u_char	*sc_ep;			/* pointer to last available buf char */
     49 	u_char	*sc_buf;		/* input buffer */
     50 	u_int	sc_flags;		/* see below */
     51 	u_int	sc_escape;	/* =1 if last char input was FRAME_ESCAPE */
     52 	long	sc_lasttime;		/* last time a char arrived */
     53 	long	sc_abortcount;		/* number of abort esacpe chars */
     54 	long	sc_starttime;		/* time of first abort in window */
     55 	long	sc_oqlen;		/* previous output queue size */
     56 	long	sc_otimeout;		/* number of times output's stalled */
     57 #ifdef __NetBSD__
     58 	int	sc_oldbufsize;		/* previous output buffer size */
     59 	int	sc_oldbufquot;		/* previous output buffer quoting */
     60 #endif
     61 #ifdef INET				/* XXX */
     62 	struct	slcompress sc_comp;	/* tcp compression data */
     63 #endif
     64 	caddr_t	sc_bpf;			/* BPF data */
     65 };
     66 
     67 /* internal flags */
     68 #define	SC_ERROR	0x0001		/* had an input error */
     69 
     70 /* visible flags */
     71 #define	SC_COMPRESS	IFF_LINK0	/* compress TCP traffic */
     72 #define	SC_NOICMP	IFF_LINK1	/* supress ICMP traffic */
     73 #define	SC_AUTOCOMP	IFF_LINK2	/* auto-enable TCP compression */
     74 
     75 #ifdef KERNEL
     76 void	slattach __P((void));
     77 void	slclose __P((struct tty *));
     78 void	slinput __P((int, struct tty *));
     79 int	slioctl __P((struct ifnet *, int, caddr_t));
     80 int	slopen __P((dev_t, struct tty *));
     81 int	sloutput __P((struct ifnet *,
     82 	    struct mbuf *, struct sockaddr *, struct rtentry *));
     83 void	slstart __P((struct tty *));
     84 int	sltioctl __P((struct tty *, int, caddr_t, int));
     85 #endif /* KERNEL */
     86