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/*
* Copyright (c) University of British Columbia, 1984
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Laboratory for Computation Vision and the Computer Science Department
* of the University of British Columbia.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)hd_var.h 8.1 (Berkeley) 6/10/93
* $Id: hd_var.h,v 1.3 1994/08/21 05:44:06 paul Exp $
*/
#ifndef _NETCCITT_HD_VAR_H_
#define _NETCCITT_HD_VAR_H_
/*
*
* hdlc control block
*
*/
struct hdtxq {
struct mbuf *head;
struct mbuf *tail;
};
struct hdcb {
struct hdcb *hd_next; /* pointer to next hdlc control block */
char hd_state; /* link state */
char hd_vs; /* send state variable */
char hd_vr; /* receive state variable */
char hd_lastrxnr; /* last received N(R) */
char hd_lasttxnr; /* last transmitted N(R) */
char hd_condition;
#define TIMER_RECOVERY_CONDITION 0x01
#define REJ_CONDITION 0x02
#define REMOTE_RNR_CONDITION 0X04
char hd_retxcnt;
char hd_xx;
struct hdtxq hd_txq;
struct mbuf *hd_retxq[MODULUS];
char hd_retxqi;
char hd_rrtimer;
char hd_timer;
#define SET_TIMER(hdp) hdp->hd_timer = hd_t1
#define KILL_TIMER(hdp) hdp->hd_timer = 0
char hd_dontcopy; /* if-driver doesn't free I-frames */
struct ifnet *hd_ifp; /* device's network visible interface */
struct ifaddr *hd_ifa; /* device's X.25 network address */
struct x25config *hd_xcp;
caddr_t hd_pkp; /* Level III junk */
int (*hd_output)(); /* separate entry for HDLC direct output */
/* link statistics */
long hd_iframes_in;
long hd_iframes_out;
long hd_rrs_in;
long hd_rrs_out;
short hd_rejs_in;
short hd_rejs_out;
long hd_window_condition;
short hd_invalid_ns;
short hd_invalid_nr;
short hd_timeouts;
short hd_resets;
short hd_unknown;
short hd_frmrs_in;
short hd_frmrs_out;
short hd_rnrs_in;
short hd_rnrs_out;
};
#ifdef KERNEL
extern struct hdcb *hdcbhead; /* head of linked list of hdcb's */
extern struct Frmr_frame hd_frmr; /* rejected frame diagnostic info */
extern struct ifqueue hdintrq; /* hdlc packet input queue */
extern int hd_t1; /* timer T1 value */
extern int hd_t3; /* RR send timer */
extern int hd_n2; /* frame retransmission limit */
#endif
#endif
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