/*      $NetBSD: if_pppvar.h,v 1.28 2016/04/28 00:16:56 ozaki-r 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) 1989-2002 Paul Mackerras. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* 3. The name(s) of the authors of this software must not be used to
*    endorse or promote products derived from this software without
*    prior written permission.
*
* 4. Redistributions of any form whatsoever must retain the following
*    acknowledgment:
*    "This product includes software developed by Paul Mackerras
*     <[email protected]>".
*
* THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* 3. The name "Carnegie Mellon University" must not be used to
*    endorse or promote products derived from this software without
*    prior written permission. For permission or any legal
*    details, please contact
*      Office of Technology Transfer
*      Carnegie Mellon University
*      5000 Forbes Avenue
*      Pittsburgh, PA  15213-3890
*      (412) 268-4387, fax: (412) 268-7395
*      [email protected]
*
* 4. Redistributions of any form whatsoever must retain the following
*    acknowledgment:
*    "This product includes software developed by Computing Services
*     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#ifndef _NET_IF_PPPVAR_H_
#define _NET_IF_PPPVAR_H_

#include <sys/callout.h>

/*
* Supported network protocols.  These values are used for
* indexing sc_npmode.
*/
#define NP_IP   0               /* Internet Protocol */
#define NP_IPV6 1               /* Internet Protocol version 6 */
#define NUM_NP  2               /* 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)(struct ppp_softc *);        /* start output proc */
       void    (*sc_ctlp)(struct ppp_softc *); /* rcvd control pkt */
       void    (*sc_relinq)(struct ppp_softc *); /* relinquish ifunit */
       struct  callout sc_timo_ch;     /* timeout callout */
       uint16_t sc_mru;                /* max receive unit */
       pid_t   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 */
       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 */
       void    *sc_si;                 /* software interrupt handle */
#ifdef PPP_FILTER
       /* Filter for packets to pass. */
       struct  bpf_program sc_pass_filt_in;
       struct  bpf_program sc_pass_filt_out;

       /* Filter for "non-idle" packets. */
       struct  bpf_program sc_active_filt_in;
       struct  bpf_program sc_active_filt_out;
#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 */
       uint32_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 */
       uint16_t sc_ilen;               /* length of input packet so far */
       uint16_t sc_fcs;                /* FCS so far (input) */
       uint16_t sc_outfcs;             /* FCS so far for output packet */
       uint16_t sc_maxfastq;           /* Maximum number of packets that
                                        * can be received back-to-back in
                                        * the high priority queue */
       uint8_t sc_nfastq;              /* Number of packets received
                                        * back-to-back in the high priority
                                        * queue */
       u_char sc_rawin_start;          /* current char start */
       struct ppp_rawin sc_rawin;      /* chars as received */
       LIST_ENTRY(ppp_softc) sc_iflist;
};

#ifdef _KERNEL

struct  ppp_softc *pppalloc(pid_t);
void    pppdealloc(struct ppp_softc *);
int     pppioctl(struct ppp_softc *, u_long, void *, int, struct lwp *);
void    ppp_restart(struct ppp_softc *);
void    ppppktin(struct ppp_softc *, struct mbuf *, int);
struct  mbuf *ppp_dequeue(struct ppp_softc *);
int     pppoutput(struct ifnet *, struct mbuf *, const struct sockaddr *,
           const struct rtentry *);
#endif /* _KERNEL */

#endif /* !_NET_IF_PPPVAR_H_ */

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