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- /*
- * Copyright (c) University of British Columbia, 1984
- * Copyright (c) 1990 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 7.4 (Berkeley) 5/29/91
- */
-
- /*
- *
- * 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
- 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 */
- #endif
-