bsd/netccitt/hd_var.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) University of British Columbia, 1984
  24  * Copyright (c) 1990, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * This code is derived from software contributed to Berkeley by
  28  * the Laboratory for Computation Vision and the Computer Science Department
  29  * of the University of British Columbia.
  30  *
  31  * Redistribution and use in source and binary forms, with or without
  32  * modification, are permitted provided that the following conditions
  33  * are met:
  34  * 1. Redistributions of source code must retain the above copyright
  35  *    notice, this list of conditions and the following disclaimer.
  36  * 2. Redistributions in binary form must reproduce the above copyright
  37  *    notice, this list of conditions and the following disclaimer in the
  38  *    documentation and/or other materials provided with the distribution.
  39  * 3. All advertising materials mentioning features or use of this software
  40  *    must display the following acknowledgement:
  41  *      This product includes software developed by the University of
  42  *      California, Berkeley and its contributors.
  43  * 4. Neither the name of the University nor the names of its contributors
  44  *    may be used to endorse or promote products derived from this software
  45  *    without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  57  * SUCH DAMAGE.
  58  *
  59  *      @(#)hd_var.h    8.1 (Berkeley) 6/10/93
  60  */
  61
  62 /*
  63  *
  64  * hdlc control block
  65  *
  66  */
  67
  68 struct  hdtxq {
  69         struct  mbuf *head;
  70         struct  mbuf *tail;
  71 };
  72
  73 struct  hdcb {
  74         struct  hdcb *hd_next;  /* pointer to next hdlc control block */
  75         char    hd_state;       /* link state */
  76         char    hd_vs;          /* send state variable */
  77         char    hd_vr;          /* receive state variable */
  78         char    hd_lastrxnr;    /* last received N(R) */
  79         char    hd_lasttxnr;    /* last transmitted N(R) */
  80         char    hd_condition;
  81 #define TIMER_RECOVERY_CONDITION        0x01
  82 #define REJ_CONDITION                   0x02
  83 #define REMOTE_RNR_CONDITION            0X04
  84         char    hd_retxcnt;
  85         char    hd_xx;
  86         struct  hdtxq hd_txq;
  87         struct  mbuf *hd_retxq[MODULUS];
  88         char    hd_retxqi;
  89         char    hd_rrtimer;
  90         char    hd_timer;
  91 #define SET_TIMER(hdp)          hdp->hd_timer = hd_t1
  92 #define KILL_TIMER(hdp)         hdp->hd_timer = 0
  93         char    hd_dontcopy;    /* if-driver doesn't free I-frames */
  94         struct  ifnet *hd_ifp;  /* device's network visible interface */
  95         struct  ifaddr *hd_ifa; /* device's X.25 network address */
  96         struct  x25config *hd_xcp;
  97         caddr_t hd_pkp;         /* Level III junk */
  98         int     (*hd_output)(); /* separate entry for HDLC direct output */
  99
 100         /* link statistics */
 101
 102         long    hd_iframes_in;
 103         long    hd_iframes_out;
 104         long    hd_rrs_in;
 105         long    hd_rrs_out;
 106         short   hd_rejs_in;
 107         short   hd_rejs_out;
 108         long    hd_window_condition;
 109         short   hd_invalid_ns;
 110         short   hd_invalid_nr;
 111         short   hd_timeouts;
 112         short   hd_resets;
 113         short   hd_unknown;
 114         short   hd_frmrs_in;
 115         short   hd_frmrs_out;
 116         short   hd_rnrs_in;
 117         short   hd_rnrs_out;
 118 };
 119
 120 #ifdef KERNEL
 121 struct  hdcb *hdcbhead;         /* head of linked list of hdcb's */
 122 struct  Frmr_frame hd_frmr;     /* rejected frame diagnostic info */
 123 struct  ifqueue hdintrq;        /* hdlc packet input queue */
 124
 125 int     hd_t1;                  /* timer T1 value */
 126 int     hd_t3;                  /* RR send timer */
 127 int     hd_n2;                  /* frame retransmission limit */
 128 #endif