text: /*!\file net/if_pppva.h
   * PPP structures and declarations.
   */
  
  /*      $NetBSD: if_pppvar.h,v 1.7 1997/05/17 21:12:03 christos Exp $   */
  /*	Id: if_pppvar.h,v 1.3 1996/07/01 01:04:37 paulus Exp	 */
  
  /*
   * if_pppvar.h - private structures and declarations for PPP.
   *
   * Copyright (c) 1994 The Australian National University.
   * All rights reserved.
   *
   * Permission to use, copy, modify, and distribute this software and its
   * documentation is hereby granted, provided that the above copyright
   * notice appears in all copies.  This software is provided without any
   * warranty, express or implied. The Australian National University
   * makes no representations about the suitability of this software for
   * any purpose.
   *
   * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
   * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
   * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
   * OF SUCH DAMAGE.
   *
   * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
   * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
   * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
   * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
   * OR MODIFICATIONS.
   *
   * Copyright (c) 1989 Carnegie Mellon University.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms are permitted
   * provided that the above copyright notice and this paragraph are
   * duplicated in all such forms and that any documentation,
   * advertising materials, and other materials related to such
   * distribution and use acknowledge that the software was developed
   * by Carnegie Mellon University.  The name of the
   * University may not be used to endorse or promote products derived
   * from this software without specific prior written permission.
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
   * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
   */
  
  #ifndef __NET_IF_PPPVAR_H
  #define __NET_IF_PPPVAR_H
  
  /*
   * Supported network protocols.  These values are used for
   * indexing sc_npmode.
   */
  #define NP_IP	0		/* Internet Protocol */
  #define NUM_NP	1		/* Number of NPs. */
  
  /*
   * Structure describing each ppp unit.
   */
  struct ppp_softc {
  	struct	ifnet sc_if;		/* network-visible interface */
  	int	sc_unit;		/* XXX unit number */
  	u_int	sc_flags;		/* control/status bits; see if_ppp.h */
  	void	*sc_devp;		/* pointer to device-dep structure */
  	void	(*sc_start) __P((struct ppp_softc *));	/* start output proc */
  	void	(*sc_ctlp) __P((struct ppp_softc *)); /* rcvd control pkt */
  	void	(*sc_relinq) __P((struct ppp_softc *)); /* relinquish ifunit */
  	u_int16_t sc_mru;		/* max receive unit */
          int     sc_xfer;                /* used in transferring unit */
  	struct	ifqueue sc_rawq;	/* received packets */
  	struct	ifqueue sc_inq;		/* queue of input packets for daemon */
  	struct	ifqueue sc_fastq;	/* interactive output packet q */
  	struct	mbuf *sc_togo;		/* output packet ready to go */
  	struct	mbuf *sc_npqueue;	/* output packets not to be sent yet */
  	struct	mbuf **sc_npqtail;	/* ptr to last next ptr in npqueue */
  	struct	pppstat sc_stats;	/* count of bytes/pkts sent/rcvd */
  	caddr_t	sc_bpf;			/* hook for BPF */
  	enum	NPmode sc_npmode[NUM_NP]; /* what to do with each NP */
  	struct	compressor *sc_xcomp;	/* transmit compressor */
  	void	*sc_xc_state;		/* transmit compressor state */
  	struct	compressor *sc_rcomp;	/* receive decompressor */
  	void	*sc_rc_state;		/* receive decompressor state */
  	time_t	sc_last_sent;		/* time (secs) last NP pkt sent */
  	time_t	sc_last_recv;		/* time (secs) last NP pkt rcvd */
  #ifdef PPP_FILTER
  	struct	bpf_program sc_pass_filt;   /* filter for packets to pass */
  	struct	bpf_program sc_active_filt; /* filter for "non-idle" packets */
  #endif /* PPP_FILTER */
  #ifdef	VJC
  	struct	slcompress *sc_comp; 	/* vjc control buffer */
  #endif
  
  	/* Device-dependent part for async lines. */
  	ext_accm sc_asyncmap;		/* async control character map */
  	u_int32_t sc_rasyncmap;		/* receive async control char map */
  	struct	mbuf *sc_outm;		/* mbuf chain currently being output */
  	struct	mbuf *sc_m;		/* pointer to input mbuf chain */
  	struct	mbuf *sc_mc;		/* pointer to current input mbuf */
  	char	*sc_mp;			/* ptr to next char in input mbuf */
  	u_int16_t sc_ilen;		/* length of input packet so far */
  	u_int16_t sc_fcs;		/* FCS so far (input) */
  	u_int16_t sc_outfcs;		/* FCS so far for output packet */
  	u_char	sc_rawin[16];		/* chars as received */
  	int	sc_rawin_count;		/* # in sc_rawin */
  };
  
  #endif
  