Home | History | Annotate | Line # | Download | only in net
if_slvar.h revision 1.7 
      1 /*-
      2  * Copyright (c) 1991 The Regents of the University of California.
      3  * 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	7.7 (Berkeley) 5/7/91
     34  *	$Id: if_slvar.h,v 1.7 1993/12/20 07:47:18 cgd Exp $
     35  */
     36 
     37 #ifndef _IF_SLVAR_H_
     38 #define _IF_SLVAR_H_
     39 
     40 /*
     41  * Definitions for SLIP interface data structures
     42  *
     43  * (This exists so programs like slstats can get at the definition
     44  *  of sl_softc.)
     45  */
     46 struct sl_softc {
     47 	struct	ifnet sc_if;		/* network-visible interface */
     48 	struct	ifqueue sc_fastq;	/* interactive output queue */
     49 	struct	tty *sc_ttyp;		/* pointer to tty structure */
     50 	u_char	*sc_mp;			/* pointer to next available buf char */
     51 	u_char	*sc_ep;			/* pointer to last available buf char */
     52 	u_char	*sc_buf;		/* input buffer */
     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 #ifdef INET				/* XXX */
     59 	struct	slcompress sc_comp;	/* tcp compression data */
     60 #endif
     61 	caddr_t	sc_bpf;			/* BPF data */
     62 };
     63 
     64 /* internal flags */
     65 #define	SC_ERROR	0x0001		/* had an input error */
     66 
     67 /* visible flags */
     68 #define	SC_COMPRESS	IFF_LINK0	/* compress TCP traffic */
     69 #define	SC_NOICMP	IFF_LINK1	/* supress ICMP traffic */
     70 #define	SC_AUTOCOMP	IFF_LINK2	/* auto-enable TCP compression */
     71 
     72 /* this stuff doesn't belong here... */
     73 #define	SLIOCGUNIT	_IOR('t', 88, int)	/* get slip unit number */
     74 
     75 /*
     76  * definitions of the pseudo- link-level header attached to  slip
     77  * packets grabbed by the packet filter (bpf) traffic monitor.
     78  * These definitions pulled from BPF's "slip.h" by cgd.
     79  */
     80 #define	SLIP_HDRLEN	16		/* BPF SLIP header length */
     81 
     82 /* offsets into BPF SLIP header */
     83 #define	SLX_DIR		0		/* direction; see below */
     84 #define	SLX_CHDR	1		/* compressed header data */
     85 #define	CHDR_LEN	15		/* length of compressed header data */
     86 
     87 #define	SLIPDIR_IN	0		/* incoming */
     88 #define	SLIPDIR_OUT	1		/* outgoing */
     89 
     90 #ifdef KERNEL
     91 void	slattach __P((void));
     92 void	slclose __P((struct tty *));
     93 void	slinput __P((int, struct tty *));
     94 int	slioctl __P((struct ifnet *, int, caddr_t));
     95 int	slopen __P((dev_t, struct tty *));
     96 int	sloutput __P((struct ifnet *,
     97 	    struct mbuf *, struct sockaddr *, struct rtentry *));
     98 void	slstart __P((struct tty *));
     99 int	sltioctl __P((struct tty *, int, caddr_t, int));
    100 #endif /* KERNEL */
    101 #endif /* !_IF_SLVAR_H_ */
    102