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/* $OpenBSD: hd_var.h,v 1.5 2003/06/02 23:28:13 millert Exp $ */
/* $NetBSD: hd_var.h,v 1.7 1996/02/13 22:04:34 christos Exp $ */
/*
* 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. 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
*/
/*
*
* 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 */
/* separate entry for HDLC direct output */
int (*hd_output)(struct mbuf *, ...);
/* 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 */
struct Hdlc_frame;
struct Hdlc_iframe;
struct Hdlc_sframe;
int hd_t1; /* timer T1 value */
int hd_t3; /* RR send timer */
int hd_n2; /* frame retransmission limit */
/* hd_debug.c */
void hd_trace(struct hdcb *, int , struct Hdlc_frame *);
int hd_dumptrace(struct hdcb *);
/* hd_input.c */
void hdintr(void);
int process_rxframe(struct hdcb *, struct mbuf *);
int process_iframe(struct hdcb *, struct mbuf *, struct Hdlc_iframe *);
bool range_check(int, int , int );
void process_sframe(struct hdcb *, struct Hdlc_sframe *, int);
bool valid_nr(struct hdcb *, int , int);
/* hd_output.c */
int hd_output(struct mbuf *, ...);
void hd_start(struct hdcb *);
void hd_send_iframe(struct hdcb *, struct mbuf *, int);
int hd_ifoutput(struct mbuf *, ...);
void hd_resend_iframe(struct hdcb *);
/* hd_subr.c */
void hd_init(void);
void *hd_ctlinput(int , struct sockaddr *, void *);
void hd_initvars(struct hdcb *);
int hd_decode(struct hdcb *, struct Hdlc_frame *);
void hd_writeinternal(struct hdcb *, int, int );
void hd_append(struct hdtxq *, struct mbuf *);
void hd_flush(struct ifnet *);
void hd_message(struct hdcb *, char *);
int hd_status(struct hdcb *);
struct mbuf *hd_remove(struct hdtxq *);
/* hd_timer.c */
void hd_timer(void);
#endif
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