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if_pppvar.h revision 1.3 
      1 /*	$NetBSD: if_pppvar.h,v 1.3 1996/03/15 02:28:06 paulus Exp $	*/
      2 /*
      3  * if_pppvar.h - private structures and declarations for PPP.
      4  *
      5  * Copyright (c) 1994 The Australian National University.
      6  * All rights reserved.
      7  *
      8  * Permission to use, copy, modify, and distribute this software and its
      9  * documentation is hereby granted, provided that the above copyright
     10  * notice appears in all copies.  This software is provided without any
     11  * warranty, express or implied. The Australian National University
     12  * makes no representations about the suitability of this software for
     13  * any purpose.
     14  *
     15  * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
     16  * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
     17  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
     18  * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
     19  * OF SUCH DAMAGE.
     20  *
     21  * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
     22  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
     23  * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
     24  * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
     25  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
     26  * OR MODIFICATIONS.
     27  *
     28  * Copyright (c) 1989 Carnegie Mellon University.
     29  * All rights reserved.
     30  *
     31  * Redistribution and use in source and binary forms are permitted
     32  * provided that the above copyright notice and this paragraph are
     33  * duplicated in all such forms and that any documentation,
     34  * advertising materials, and other materials related to such
     35  * distribution and use acknowledge that the software was developed
     36  * by Carnegie Mellon University.  The name of the
     37  * University may not be used to endorse or promote products derived
     38  * from this software without specific prior written permission.
     39  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
     40  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
     41  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     42  */
     43 
     44 /*
     45  * Supported network protocols.  These values are used for
     46  * indexing sc_npmode.
     47  */
     48 #define NP_IP	0		/* Internet Protocol */
     49 #define NUM_NP	1		/* Number of NPs. */
     50 
     51 /*
     52  * Structure describing each ppp unit.
     53  */
     54 struct ppp_softc {
     55 	struct	ifnet sc_if;		/* network-visible interface */
     56 	u_int	sc_flags;		/* control/status bits; see if_ppp.h */
     57 	void	*sc_devp;		/* pointer to device-dep structure */
     58 	void	(*sc_start) __P((struct ppp_softc *));	/* start output proc */
     59 	void	(*sc_ctlp) __P((struct ppp_softc *)); /* rcvd control pkt */
     60 	void	(*sc_relinq) __P((struct ppp_softc *)); /* relinquish ifunit */
     61 	u_int16_t sc_mru;		/* max receive unit */
     62 	pid_t	sc_xfer;		/* used in transferring unit */
     63 	struct	ifqueue sc_rawq;	/* received packets */
     64 	struct	ifqueue sc_inq;		/* queue of input packets for daemon */
     65 	struct	ifqueue sc_fastq;	/* interactive output packet q */
     66 	struct	mbuf *sc_togo;		/* output packet ready to go */
     67 	struct	mbuf *sc_npqueue;	/* output packets not to be sent yet */
     68 	struct	mbuf **sc_npqtail;	/* ptr to last next ptr in npqueue */
     69 	struct	pppstat sc_stats;	/* count of bytes/pkts sent/rcvd */
     70 	caddr_t	sc_bpf;			/* hook for BPF */
     71 	enum	NPmode sc_npmode[NUM_NP]; /* what to do with each NP */
     72 	struct	compressor *sc_xcomp;	/* transmit compressor */
     73 	void	*sc_xc_state;		/* transmit compressor state */
     74 	struct	compressor *sc_rcomp;	/* receive decompressor */
     75 	void	*sc_rc_state;		/* receive decompressor state */
     76 	time_t	sc_last_sent;		/* time (secs) last NP pkt sent */
     77 	time_t	sc_last_recv;		/* time (secs) last NP pkt rcvd */
     78 	struct	bpf_program sc_pass_filt;   /* filter for packets to pass */
     79 	struct	bpf_program sc_active_filt; /* filter for "non-idle" packets */
     80 #ifdef	VJC
     81 	struct	slcompress *sc_comp; 	/* vjc control buffer */
     82 #endif
     83 
     84 	/* Device-dependent part for async lines. */
     85 	ext_accm sc_asyncmap;		/* async control character map */
     86 	u_int32_t sc_rasyncmap;		/* receive async control char map */
     87 	struct	mbuf *sc_outm;		/* mbuf chain currently being output */
     88 	struct	mbuf *sc_m;		/* pointer to input mbuf chain */
     89 	struct	mbuf *sc_mc;		/* pointer to current input mbuf */
     90 	char	*sc_mp;			/* ptr to next char in input mbuf */
     91 	u_int16_t sc_ilen;		/* length of input packet so far */
     92 	u_int16_t sc_fcs;		/* FCS so far (input) */
     93 	u_int16_t sc_outfcs;		/* FCS so far for output packet */
     94 	u_char	sc_rawin[16];		/* chars as received */
     95 	int	sc_rawin_count;		/* # in sc_rawin */
     96 };
     97 
     98 struct	ppp_softc ppp_softc[NPPP];
     99 
    100 struct	ppp_softc *pppalloc __P((pid_t pid));
    101 void	pppdealloc __P((struct ppp_softc *sc));
    102 int	pppioctl __P((struct ppp_softc *sc, u_long cmd, caddr_t data,
    103 		      int flag, struct proc *p));
    104 void	ppppktin __P((struct ppp_softc *sc, struct mbuf *m, int lost));
    105 struct	mbuf *ppp_dequeue __P((struct ppp_softc *sc));
    106