Remove ISDN4BSD (I4B) from HEAD as it is not MPSAFE and

parts relied on the now removed NET_NEEDS_GIANT.
Most of I4B has been disconnected from the build
since July 2007 in HEAD/RELENG_7.

This is what was removed:
- configuration in /etc/isdn
- examples
- man pages
- kernel configuration
- sys/i4b (drivers, layers, include files)
- user space tools
- i4b support from ppp
- further documentation

Discussed with: rwatson, re

1 files changed, 0 insertions, 826 deletions

diff --git a/sys/i4b/driver/i4b_rbch.c b/sys/i4b/driver/i4b_rbch.c
deleted file mode 100644
index 7ccca77..0000000
--- a/sys/i4b/driver/i4b_rbch.c
+++ /dev/null
@@ -1,826 +0,0 @@
-/*-
- * Copyright (c) 1997, 2002 Hellmuth Michaelis. All rights reserved.
- *
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
- */
-
-/*---------------------------------------------------------------------------
- *
- *	i4b_rbch.c - device driver for raw B channel data
- *	---------------------------------------------------
- *	last edit-date: [Sun Mar 17 09:51:03 2002]
- *
- *---------------------------------------------------------------------------*/
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include "opt_i4b.h"
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/conf.h>
-#include <sys/uio.h>
-#include <sys/kernel.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/filio.h>
-#include <sys/tty.h>
-
-#include <net/if.h>
-
-#include <i4b/include/i4b_ioctl.h>
-#include <i4b/include/i4b_rbch_ioctl.h>
-#include <i4b/include/i4b_debug.h>
-
-#include <i4b/include/i4b_global.h>
-#include <i4b/include/i4b_mbuf.h>
-#include <i4b/include/i4b_l3l4.h>
-
-#include <i4b/layer4/i4b_l4.h>
-
-#include <sys/ioccom.h>
-#include <sys/poll.h>
-
-static drvr_link_t rbch_drvr_linktab[NI4BRBCH];
-static isdn_link_t *isdn_linktab[NI4BRBCH];
-
-#define I4BRBCHACCT		1 	/* enable accounting messages */
-#define	I4BRBCHACCTINTVL	2	/* accounting msg interval in secs */
-
-static struct rbch_softc {
-	int sc_unit;			/* unit number 		*/
-
-	int sc_devstate;		/* state of driver	*/
-#define ST_IDLE		0x00
-#define ST_CONNECTED	0x01
-#define ST_ISOPEN	0x02
-#define ST_RDWAITDATA	0x04
-#define ST_WRWAITEMPTY	0x08
-#define ST_NOBLOCK	0x10
-
-	int sc_bprot;			/* B-ch protocol used	*/
-	call_desc_t *sc_cd;		/* Call Descriptor */
-	struct termios it_in;
-
-	struct ifqueue sc_hdlcq;	/* hdlc read queue	*/
-#define I4BRBCHMAXQLEN	10
-
-	struct selinfo selp;		/* select / poll	*/
-
-#if I4BRBCHACCT
-	struct callout_handle sc_callout;
-	int		sc_iinb;	/* isdn driver # of inbytes	*/
-	int		sc_ioutb;	/* isdn driver # of outbytes	*/
-	int		sc_linb;	/* last # of bytes rx'd		*/
-	int		sc_loutb;	/* last # of bytes tx'd 	*/
-	int		sc_fn;		/* flag, first null acct	*/
-#endif	
-} rbch_softc[NI4BRBCH];
-
-static void rbch_rx_data_rdy(int unit);
-static void rbch_tx_queue_empty(int unit);
-static void rbch_connect(int unit, void *cdp);
-static void rbch_disconnect(int unit, void *cdp);
-static void rbch_init_linktab(int unit);
-static void rbch_clrq(int unit);
-
-static 	d_open_t	i4brbchopen;
-static 	d_close_t	i4brbchclose;
-static 	d_read_t	i4brbchread;
-static 	d_read_t	i4brbchwrite;
-static 	d_ioctl_t	i4brbchioctl;
-static 	d_poll_t	i4brbchpoll;
-
-
-static struct cdevsw i4brbch_cdevsw = {
-	.d_version =	D_VERSION,
-	.d_flags =	D_NEEDGIANT,
-	.d_open =	i4brbchopen,
-	.d_close =	i4brbchclose,
-	.d_read =	i4brbchread,
-	.d_write =	i4brbchwrite,
-	.d_ioctl =	i4brbchioctl,
-	.d_poll =	i4brbchpoll,
-	.d_name =	"i4brbch",
-};
-
-static void i4brbchattach(void *);
-PSEUDO_SET(i4brbchattach, i4b_rbch);
-
-/*===========================================================================*
- *			DEVICE DRIVER ROUTINES
- *===========================================================================*/
-
-/*---------------------------------------------------------------------------*
- *	interface attach routine
- *---------------------------------------------------------------------------*/
-static void
-i4brbchattach(void *dummy)
-{
-	int i;
-
-	printf("i4brbch: %d raw B channel access device(s) attached\n", NI4BRBCH);
-	
-	for(i=0; i < NI4BRBCH; i++)
-	{
-		make_dev(&i4brbch_cdevsw, i,
-			UID_ROOT, GID_WHEEL, 0600, "i4brbch%d", i);
-
-#if I4BRBCHACCT
-		callout_handle_init(&rbch_softc[i].sc_callout);
-		rbch_softc[i].sc_fn = 1;
-#endif
-		rbch_softc[i].sc_unit = i;
-		rbch_softc[i].sc_devstate = ST_IDLE;
-		rbch_softc[i].sc_hdlcq.ifq_maxlen = I4BRBCHMAXQLEN;
-
-		if(!mtx_initialized(&rbch_softc[i].sc_hdlcq.ifq_mtx))
-			mtx_init(&rbch_softc[i].sc_hdlcq.ifq_mtx, "i4b_rbch", NULL, MTX_DEF);
-
-		rbch_softc[i].it_in.c_ispeed = rbch_softc[i].it_in.c_ospeed = 64000;
-		termioschars(&rbch_softc[i].it_in);
-		rbch_init_linktab(i);
-	}
-}
-
-/*---------------------------------------------------------------------------*
- *	open rbch device
- *---------------------------------------------------------------------------*/
-static int
-i4brbchopen(struct cdev *dev, int flag, int fmt, struct thread *td)
-{
-	int unit = minor(dev);
-	
-	if(unit >= NI4BRBCH)
-		return(ENXIO);
-
-	if(rbch_softc[unit].sc_devstate & ST_ISOPEN)
-		return(EBUSY);
-
-#if 0
-	rbch_clrq(unit);
-#endif
-	
-	rbch_softc[unit].sc_devstate |= ST_ISOPEN;		
-
-	NDBGL4(L4_RBCHDBG, "unit %d, open", unit);	
-
-	return(0);
-}
-
-/*---------------------------------------------------------------------------*
- *	close rbch device
- *---------------------------------------------------------------------------*/
-static int
-i4brbchclose(struct cdev *dev, int flag, int fmt, struct thread *td)
-{
-	int unit = minor(dev);
-	struct rbch_softc *sc = &rbch_softc[unit];
-	
-	if(sc->sc_devstate & ST_CONNECTED)
-		i4b_l4_drvrdisc(BDRV_RBCH, unit);
-
-	sc->sc_devstate &= ~ST_ISOPEN;		
-
-	rbch_clrq(unit);
-	
-	NDBGL4(L4_RBCHDBG, "unit %d, closed", unit);
-	
-	return(0);
-}
-
-/*---------------------------------------------------------------------------*
- *	read from rbch device
- *---------------------------------------------------------------------------*/
-static int
-i4brbchread(struct cdev *dev, struct uio *uio, int ioflag)
-{
-	struct mbuf *m;
-	int error = 0;
-	int unit = minor(dev);
-	struct ifqueue *iqp;
-	struct rbch_softc *sc = &rbch_softc[unit];
-
-	CRIT_VAR;
-	
-	NDBGL4(L4_RBCHDBG, "unit %d, enter read", unit);
-	
-	CRIT_BEG;
-	if(!(sc->sc_devstate & ST_ISOPEN))
-	{
-		CRIT_END;
-		NDBGL4(L4_RBCHDBG, "unit %d, read while not open", unit);
-		return(EIO);
-	}
-
-	if((sc->sc_devstate & ST_NOBLOCK))
-	{
-		if(!(sc->sc_devstate & ST_CONNECTED)) {
-			CRIT_END;
-			return(EWOULDBLOCK);
-		}
-
-		if(sc->sc_bprot == BPROT_RHDLC)
-			iqp = &sc->sc_hdlcq;
-		else
-			iqp = isdn_linktab[unit]->rx_queue;	
-
-		if(IF_QEMPTY(iqp) && (sc->sc_devstate & ST_ISOPEN)) {
-			CRIT_END;
-			return(EWOULDBLOCK);
-	}
-	}
-	else
-	{
-		while(!(sc->sc_devstate & ST_CONNECTED))
-		{
-			NDBGL4(L4_RBCHDBG, "unit %d, wait read init", unit);
-		
-			if((error = tsleep( &rbch_softc[unit],
-					   I4BPRI | PCATCH,
-					   "rrrbch", 0 )) != 0)
-			{
-				CRIT_END;
-				NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep", unit, error);
-				return(error);
-			}
-		}
-
-		if(sc->sc_bprot == BPROT_RHDLC)
-			iqp = &sc->sc_hdlcq;
-		else
-			iqp = isdn_linktab[unit]->rx_queue;	
-
-		while(IF_QEMPTY(iqp) && (sc->sc_devstate & ST_ISOPEN))
-		{
-			sc->sc_devstate |= ST_RDWAITDATA;
-		
-			NDBGL4(L4_RBCHDBG, "unit %d, wait read data", unit);
-		
-			if((error = tsleep( &isdn_linktab[unit]->rx_queue,
-					   I4BPRI | PCATCH,
-					   "rrbch", 0 )) != 0)
-			{
-				CRIT_END;
-				NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep read", unit, error);
-				sc->sc_devstate &= ~ST_RDWAITDATA;
-				return(error);
-			}
-		}
-	}
-
-	IF_DEQUEUE(iqp, m);
-
-	NDBGL4(L4_RBCHDBG, "unit %d, read %d bytes", unit, m->m_len);
-	
-	if(m && m->m_len)
-	{
-		error = uiomove(m->m_data, m->m_len, uio);
-	}
-	else
-	{
-		NDBGL4(L4_RBCHDBG, "unit %d, error %d uiomove", unit, error);
-		error = EIO;
-	}
-		
-	if(m)
-		i4b_Bfreembuf(m);
-
-	CRIT_END;
-
-	return(error);
-}
-
-/*---------------------------------------------------------------------------*
- *	write to rbch device
- *---------------------------------------------------------------------------*/
-static int
-i4brbchwrite(struct cdev *dev, struct uio * uio, int ioflag)
-{
-	struct mbuf *m;
-	int error = 0;
-	int unit = minor(dev);
-	struct rbch_softc *sc = &rbch_softc[unit];
-
-	CRIT_VAR;
-	
-	NDBGL4(L4_RBCHDBG, "unit %d, write", unit);	
-
-	CRIT_BEG;
-	if(!(sc->sc_devstate & ST_ISOPEN))
-	{
-		NDBGL4(L4_RBCHDBG, "unit %d, write while not open", unit);
-		CRIT_END;
-		return(EIO);
-	}
-
-	if((sc->sc_devstate & ST_NOBLOCK))
-	{
-		if(!(sc->sc_devstate & ST_CONNECTED)) {
-			CRIT_END;
-			return(EWOULDBLOCK);
-		}
-		if(_IF_QFULL(isdn_linktab[unit]->tx_queue) && (sc->sc_devstate & ST_ISOPEN)) {
-			CRIT_END;
-			return(EWOULDBLOCK);
-	}
-	}
-	else
-	{
-		while(!(sc->sc_devstate & ST_CONNECTED))
-		{
-			NDBGL4(L4_RBCHDBG, "unit %d, write wait init", unit);
-		
-			error = tsleep( &rbch_softc[unit],
-						   I4BPRI | PCATCH,
-						   "wrrbch", 0 );
-			if(error == ERESTART) {
-				CRIT_END;
-				return (ERESTART);
-			}
-			else if(error == EINTR)
-			{
-				CRIT_END;
-				NDBGL4(L4_RBCHDBG, "unit %d, EINTR during wait init", unit);
-				return(EINTR);
-			}
-			else if(error)
-			{
-				CRIT_END;
-				NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep init", unit, error);
-				return(error);
-			}
-			tsleep( &rbch_softc[unit], I4BPRI | PCATCH, "xrbch", (hz*1));
-		}
-
-		while(_IF_QFULL(isdn_linktab[unit]->tx_queue) && (sc->sc_devstate & ST_ISOPEN))
-		{
-			sc->sc_devstate |= ST_WRWAITEMPTY;
-
-			NDBGL4(L4_RBCHDBG, "unit %d, write queue full", unit);
-		
-			if ((error = tsleep( &isdn_linktab[unit]->tx_queue,
-					    I4BPRI | PCATCH,
-					    "wrbch", 0)) != 0) {
-				sc->sc_devstate &= ~ST_WRWAITEMPTY;
-				if(error == ERESTART)
-				{
-					CRIT_END;
-					return(ERESTART);
-				}
-				else if(error == EINTR)
-				{
-					CRIT_END;
-					NDBGL4(L4_RBCHDBG, "unit %d, EINTR during wait write", unit);
-					return(error);
-				}
-				else if(error)
-				{
-					CRIT_END;
-					NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep write", unit, error);
-					return(error);
-				}
-			}
-		}
-	}
-
-	if(!(sc->sc_devstate & ST_ISOPEN))
-	{
-		NDBGL4(L4_RBCHDBG, "unit %d, not open anymore", unit);
-		CRIT_END;
-		return(EIO);
-	}
-
-	if((m = i4b_Bgetmbuf(BCH_MAX_DATALEN)) != NULL)
-	{
-		m->m_len = min(BCH_MAX_DATALEN, uio->uio_resid);
-
-		NDBGL4(L4_RBCHDBG, "unit %d, write %d bytes", unit, m->m_len);
-		
-		error = uiomove(m->m_data, m->m_len, uio);
-
-		(void) IF_HANDOFF(isdn_linktab[unit]->tx_queue, m, NULL);
-
-		(*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
-	}
-
-	CRIT_END;
-	
-	return(error);
-}
-
-/*---------------------------------------------------------------------------*
- *	rbch device ioctl handlibg
- *---------------------------------------------------------------------------*/
-static int
-i4brbchioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
-{
-	int error = 0;
-	int unit = minor(dev);
-	struct rbch_softc *sc = &rbch_softc[unit];
-	
-	switch(cmd)
-	{
-		case FIOASYNC:	/* Set async mode */
-			if (*(int *)data)
-			{
-				NDBGL4(L4_RBCHDBG, "unit %d, setting async mode", unit);
-			}
-			else
-			{
-				NDBGL4(L4_RBCHDBG, "unit %d, clearing async mode", unit);
-			}
-			break;
-
-		case FIONBIO:
-			if (*(int *)data)
-			{
-				NDBGL4(L4_RBCHDBG, "unit %d, setting non-blocking mode", unit);
-				sc->sc_devstate |= ST_NOBLOCK;
-			}
-			else
-			{
-				NDBGL4(L4_RBCHDBG, "unit %d, clearing non-blocking mode", unit);
-				sc->sc_devstate &= ~ST_NOBLOCK;
-			}
-			break;
-
-		case TIOCCDTR:	/* Clear DTR */
-			if(sc->sc_devstate & ST_CONNECTED)
-			{
-				NDBGL4(L4_RBCHDBG, "unit %d, disconnecting for DTR down", unit);
-				i4b_l4_drvrdisc(BDRV_RBCH, unit);
-			}
-			break;
-
-		case I4B_RBCH_DIALOUT:
-                {
-			size_t l;
-
-			for (l = 0; l < TELNO_MAX && ((char *)data)[l]; l++)
-				;
-			if (l)
-			{
-				NDBGL4(L4_RBCHDBG, "unit %d, attempting dialout to %s", unit, (char *)data);
-				i4b_l4_dialoutnumber(BDRV_RBCH, unit, l, (char *)data);
-				break;
-			}
-			/* FALLTHROUGH to SDTR */
-		}
-
-		case TIOCSDTR:	/* Set DTR */
-			NDBGL4(L4_RBCHDBG, "unit %d, attempting dialout (DTR)", unit);
-			i4b_l4_dialout(BDRV_RBCH, unit);
-			break;
-
-		case TIOCSETA:	/* Set termios struct */
-			break;
-
-		case TIOCGETA:	/* Get termios struct */
-			*(struct termios *)data = sc->it_in;
-			break;
-
-		case TIOCMGET:
-			*(int *)data = TIOCM_LE|TIOCM_DTR|TIOCM_RTS|TIOCM_CTS|TIOCM_DSR;
-			if (sc->sc_devstate & ST_CONNECTED)
-				*(int *)data |= TIOCM_CD;
-			break;
-
-		case I4B_RBCH_VR_REQ:
-                {
-			msg_vr_req_t *mvr;
-
-			mvr = (msg_vr_req_t *)data;
-
-			mvr->version = VERSION;
-			mvr->release = REL;
-			mvr->step = STEP;			
-			break;
-		}
-
-		default:	/* Unknown stuff */
-			NDBGL4(L4_RBCHDBG, "unit %d, ioctl, unknown cmd %lx", unit, (u_long)cmd);
-			error = EINVAL;
-			break;
-	}
-	return(error);
-}
-
-/*---------------------------------------------------------------------------*
- *	device driver poll
- *---------------------------------------------------------------------------*/
-static int
-i4brbchpoll(struct cdev *dev, int events, struct thread *td)
-{
-	int revents = 0;	/* Events we found */
-	int s;
-	int unit = minor(dev);
-	struct rbch_softc *sc = &rbch_softc[unit];
-	
-	/* We can't check for anything but IN or OUT */
-
-	s = splhigh();
-
-	if(!(sc->sc_devstate & ST_ISOPEN))
-	{
-		splx(s);
-		return(POLLNVAL);
-	}
-
-	/*
-	 * Writes are OK if we are connected and the
-         * transmit queue can take them
-	 */
-	 
-	if((events & (POLLOUT|POLLWRNORM)) &&
-	   (sc->sc_devstate & ST_CONNECTED) &&
-	   !_IF_QFULL(isdn_linktab[unit]->tx_queue))
-	{
-		revents |= (events & (POLLOUT|POLLWRNORM));
-	}
-	
-	/* ... while reads are OK if we have any data */
-
-	if((events & (POLLIN|POLLRDNORM)) &&
-	   (sc->sc_devstate & ST_CONNECTED))
-	{
-		struct ifqueue *iqp;
-
-		if(sc->sc_bprot == BPROT_RHDLC)
-			iqp = &sc->sc_hdlcq;
-		else
-			iqp = isdn_linktab[unit]->rx_queue;	
-
-		if(!IF_QEMPTY(iqp))
-			revents |= (events & (POLLIN|POLLRDNORM));
-	}
-		
-	if(revents == 0)
-		selrecord(td, &sc->selp);
-
-	splx(s);
-	return(revents);
-}
-
-#if I4BRBCHACCT
-/*---------------------------------------------------------------------------*
- *	watchdog routine
- *---------------------------------------------------------------------------*/
-static void
-rbch_timeout(struct rbch_softc *sc)
-{
-	bchan_statistics_t bs;
-	int unit = sc->sc_unit;
-
-	/* get # of bytes in and out from the HSCX driver */ 
-	
-	(*isdn_linktab[unit]->bch_stat)
-		(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
-
-	sc->sc_ioutb += bs.outbytes;
-	sc->sc_iinb += bs.inbytes;
-	
-	if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn) 
-	{
-		int ri = (sc->sc_iinb - sc->sc_linb)/I4BRBCHACCTINTVL;
-		int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BRBCHACCTINTVL;
-
-		if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
-			sc->sc_fn = 0;
-		else
-			sc->sc_fn = 1;
-			
-		sc->sc_linb = sc->sc_iinb;
-		sc->sc_loutb = sc->sc_ioutb;
-
-		i4b_l4_accounting(BDRV_RBCH, unit, ACCT_DURING,
-			 sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_ioutb, sc->sc_iinb);
- 	}
-	START_TIMER(sc->sc_callout, rbch_timeout, sc, I4BRBCHACCTINTVL*hz);
-}
-#endif /* I4BRBCHACCT */
-
-/*===========================================================================*
- *			ISDN INTERFACE ROUTINES
- *===========================================================================*/
-
-/*---------------------------------------------------------------------------*
- *	this routine is called from L4 handler at connect time
- *---------------------------------------------------------------------------*/
-static void
-rbch_connect(int unit, void *cdp)
-{
-	call_desc_t *cd = (call_desc_t *)cdp;
-	struct rbch_softc *sc = &rbch_softc[unit];
-
-	sc->sc_bprot = cd->bprot;
-
-#if I4BRBCHACCT
-	if(sc->sc_bprot == BPROT_RHDLC)
-	{	
-		sc->sc_iinb = 0;
-		sc->sc_ioutb = 0;
-		sc->sc_linb = 0;
-		sc->sc_loutb = 0;
-
-		START_TIMER(sc->sc_callout, rbch_timeout, sc, I4BRBCHACCTINTVL*hz);
-	}
-#endif		
-	if(!(sc->sc_devstate & ST_CONNECTED))
-	{
-		NDBGL4(L4_RBCHDBG, "unit %d, wakeup", unit);
-		sc->sc_devstate |= ST_CONNECTED;
-		sc->sc_cd = cdp;
-		wakeup(sc);
-	}
-}
-
-/*---------------------------------------------------------------------------*
- *	this routine is called from L4 handler at disconnect time
- *---------------------------------------------------------------------------*/
-static void
-rbch_disconnect(int unit, void *cdp)
-{
-	call_desc_t *cd = (call_desc_t *)cdp;
-	struct rbch_softc *sc = &rbch_softc[unit];
-
-	CRIT_VAR;
-	
-        if(cd != sc->sc_cd)
-	{
-		NDBGL4(L4_RBCHDBG, "rbch%d: channel %d not active",
-			cd->driver_unit, cd->channelid);
-		return;
-	}
-
-	CRIT_BEG;
-	
-	NDBGL4(L4_RBCHDBG, "unit %d, disconnect", unit);
-
-	sc->sc_devstate &= ~ST_CONNECTED;
-
-	sc->sc_cd = NULL;
-	
-#if I4BRBCHACCT
-	i4b_l4_accounting(BDRV_RBCH, unit, ACCT_FINAL,
-		 sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_ioutb, sc->sc_iinb);
-
-	STOP_TIMER(sc->sc_callout, rbch_timeout, sc);
-#endif		
-	CRIT_END;
-}
-	
-/*---------------------------------------------------------------------------*
- *	feedback from daemon in case of dial problems
- *---------------------------------------------------------------------------*/
-static void
-rbch_dialresponse(int unit, int status, cause_t cause)
-{
-}
-	
-/*---------------------------------------------------------------------------*
- *	interface up/down
- *---------------------------------------------------------------------------*/
-static void
-rbch_updown(int unit, int updown)
-{
-}
-	
-/*---------------------------------------------------------------------------*
- *	this routine is called from the HSCX interrupt handler
- *	when a new frame (mbuf) has been received and is to be put on
- *	the rx queue.
- *---------------------------------------------------------------------------*/
-static void
-rbch_rx_data_rdy(int unit)
-{
-	if(rbch_softc[unit].sc_bprot == BPROT_RHDLC)
-	{
-		register struct mbuf *m;
-		
-		if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
-			return;
-
-		m->m_pkthdr.len = m->m_len;
-
-		if (! IF_HANDOFF(&(rbch_softc[unit].sc_hdlcq), m, NULL))
-		{
-			NDBGL4(L4_RBCHDBG, "unit %d: hdlc rx queue full!", unit);
-		}
-	}
-
-	if(rbch_softc[unit].sc_devstate & ST_RDWAITDATA)
-	{
-		NDBGL4(L4_RBCHDBG, "unit %d, wakeup", unit);
-		rbch_softc[unit].sc_devstate &= ~ST_RDWAITDATA;
-		wakeup( &isdn_linktab[unit]->rx_queue);
-	}
-	else
-	{
-		NDBGL4(L4_RBCHDBG, "unit %d, NO wakeup", unit);
-	}
-	selwakeuppri(&rbch_softc[unit].selp, I4BPRI);
-}
-
-/*---------------------------------------------------------------------------*
- *	this routine is called from the HSCX interrupt handler
- *	when the last frame has been sent out and there is no
- *	further frame (mbuf) in the tx queue.
- *---------------------------------------------------------------------------*/
-static void
-rbch_tx_queue_empty(int unit)
-{
-	if(rbch_softc[unit].sc_devstate & ST_WRWAITEMPTY)
-	{
-		NDBGL4(L4_RBCHDBG, "unit %d, wakeup", unit);
-		rbch_softc[unit].sc_devstate &= ~ST_WRWAITEMPTY;
-		wakeup( &isdn_linktab[unit]->tx_queue);
-	}
-	else
-	{
-		NDBGL4(L4_RBCHDBG, "unit %d, NO wakeup", unit);
-	}
-	selwakeuppri(&rbch_softc[unit].selp, TTOPRI);
-}
-
-/*---------------------------------------------------------------------------*
- *	this routine is called from the HSCX interrupt handler
- *	each time a packet is received or transmitted
- *---------------------------------------------------------------------------*/
-static void
-rbch_activity(int unit, int rxtx)
-{
-	if (rbch_softc[unit].sc_cd)
-		rbch_softc[unit].sc_cd->last_active_time = SECOND;
-	selwakeuppri(&rbch_softc[unit].selp, I4BPRI);
-}
-
-/*---------------------------------------------------------------------------*
- *	clear an hdlc rx queue for a rbch unit
- *---------------------------------------------------------------------------*/
-static void
-rbch_clrq(int unit)
-{
-	CRIT_VAR;
-
-	CRIT_BEG;
-	IF_DRAIN(&rbch_softc[unit].sc_hdlcq);
-	CRIT_END;
-}
-				
-/*---------------------------------------------------------------------------*
- *	return this drivers linktab address
- *---------------------------------------------------------------------------*/
-drvr_link_t *
-rbch_ret_linktab(int unit)
-{
-	rbch_init_linktab(unit);
-	return(&rbch_drvr_linktab[unit]);
-}
-
-/*---------------------------------------------------------------------------*
- *	setup the isdn_linktab for this driver
- *---------------------------------------------------------------------------*/
-void
-rbch_set_linktab(int unit, isdn_link_t *ilt)
-{
-	isdn_linktab[unit] = ilt;
-}
-
-/*---------------------------------------------------------------------------*
- *	initialize this drivers linktab
- *---------------------------------------------------------------------------*/
-static void
-rbch_init_linktab(int unit)
-{
-	rbch_drvr_linktab[unit].unit = unit;
-	rbch_drvr_linktab[unit].bch_rx_data_ready = rbch_rx_data_rdy;
-	rbch_drvr_linktab[unit].bch_tx_queue_empty = rbch_tx_queue_empty;
-	rbch_drvr_linktab[unit].bch_activity = rbch_activity;	
-	rbch_drvr_linktab[unit].line_connected = rbch_connect;
-	rbch_drvr_linktab[unit].line_disconnected = rbch_disconnect;
-	rbch_drvr_linktab[unit].dial_response = rbch_dialresponse;
-	rbch_drvr_linktab[unit].updown_ind = rbch_updown;	
-}
-
-/*===========================================================================*/