108 lines
3.8 KiB
C
108 lines
3.8 KiB
C
/*
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* Copyright (c) University of British Columbia, 1984
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Laboratory for Computation Vision and the Computer Science Department
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* of the University of British Columbia.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)hd_var.h 8.1 (Berkeley) 6/10/93
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*/
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/*
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*
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* hdlc control block
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*
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*/
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struct hdtxq {
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struct mbuf *head;
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struct mbuf *tail;
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};
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struct hdcb {
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struct hdcb *hd_next; /* pointer to next hdlc control block */
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char hd_state; /* link state */
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char hd_vs; /* send state variable */
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char hd_vr; /* receive state variable */
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char hd_lastrxnr; /* last received N(R) */
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char hd_lasttxnr; /* last transmitted N(R) */
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char hd_condition;
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#define TIMER_RECOVERY_CONDITION 0x01
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#define REJ_CONDITION 0x02
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#define REMOTE_RNR_CONDITION 0X04
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char hd_retxcnt;
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char hd_xx;
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struct hdtxq hd_txq;
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struct mbuf *hd_retxq[MODULUS];
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char hd_retxqi;
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char hd_rrtimer;
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char hd_timer;
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#define SET_TIMER(hdp) hdp->hd_timer = hd_t1
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#define KILL_TIMER(hdp) hdp->hd_timer = 0
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char hd_dontcopy; /* if-driver doesn't free I-frames */
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struct ifnet *hd_ifp; /* device's network visible interface */
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struct ifaddr *hd_ifa; /* device's X.25 network address */
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struct x25config *hd_xcp;
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caddr_t hd_pkp; /* Level III junk */
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int (*hd_output)(); /* separate entry for HDLC direct output */
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/* link statistics */
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long hd_iframes_in;
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long hd_iframes_out;
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long hd_rrs_in;
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long hd_rrs_out;
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short hd_rejs_in;
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short hd_rejs_out;
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long hd_window_condition;
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short hd_invalid_ns;
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short hd_invalid_nr;
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short hd_timeouts;
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short hd_resets;
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short hd_unknown;
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short hd_frmrs_in;
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short hd_frmrs_out;
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short hd_rnrs_in;
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short hd_rnrs_out;
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};
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#ifdef KERNEL
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struct hdcb *hdcbhead; /* head of linked list of hdcb's */
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struct Frmr_frame hd_frmr; /* rejected frame diagnostic info */
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struct ifqueue hdintrq; /* hdlc packet input queue */
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int hd_t1; /* timer T1 value */
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int hd_t3; /* RR send timer */
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int hd_n2; /* frame retransmission limit */
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#endif
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