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Annotation of XNU/bsd/netccitt/hd_var.h, revision 1.1

1.1     ! root        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

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