* 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
* 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
* @(#)hd_var.h 8.1 (Berkeley) 6/10/93
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) */
#define TIMER_RECOVERY_CONDITION 0x01
#define REJ_CONDITION 0x02
#define REMOTE_RNR_CONDITION 0X04
struct mbuf
*hd_retxq
[MODULUS
];
#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 */
long hd_window_condition
;
struct hdcb
*hdcbhead
; /* head of linked list of hdcb's */
struct Frmr_frame hd_frmr
; /* rejected frame diagnostic info */
struct ifqueue hdintrq
; /* hdlc packet input queue */
int hd_t1
; /* timer T1 value */
int hd_t3
; /* RR send timer */
int hd_n2
; /* frame retransmission limit */