#!/bin/sh
#
# /etc/init.d/isdn.dial
#
# ISDN Dial trigger
#
# Copyright 1997 Peter Bieringer <pb@bieringer.de>
#
#
# Version: 2.11  Datum: 18.11.1997
#
# Changes since 2.10:
#  deleting default route at stop is switched to delete all routes through
#  ISDN device to preserve automatic dial-up

#set -x

# Source function library.
[ -f /etc/init.d/functions ] || exit 0
. /etc/init.d/functions

# Source ISDN Hardware
[ -f /etc/sysconfig/isdn-hw ] || exit 0
. /etc/sysconfig/isdn-hw

# Source ISDN SyncPPP
[ -f /etc/sysconfig/isdn ] || exit 0
. /etc/sysconfig/isdn-syncppp

SYSPATH="/sbin"
DELALLIP4ROUTES="/usr/local/sbin/delip4routes"

# Check if ISDN Hardware is configured (isdn-hw.init start)
if ! [ -f /var/lock/subsys/isdn-hw ] ; then
	echo -e "\aNo ISDN Hardware Is Configured!"
	exit 1
fi

# Check if ISDN SyncPPP is configured (isdn-syncppp.init start)
if ! [ -f /var/lock/subsys/isdn-syncppp ] ; then
	echo -e "\aNo ISDN SyncPPP Is Configured!"
	exit 1
fi

# Choose Dial Device
if [ "$2" = "" ] ; then
	DIALDEVICE=$ISDNDEVICE
else
	DIALDEVICE=$2
fi

#set -x

case "$1" in
  start)
	echo "Dial ISDN Device $DIALDEVICE"

	START=0
       	TRIES=0        
	DIALWAIT=8 # seconds     
	
	echo "Dial Up With $ISDNDIALMAX Tries:"

	while ! [ $TRIES = $ISDNDIALMAX ] ; do
    		# Trigger DialUp
		$ISDNCTRLBIN dial $DIALDEVICE

		echo -n "Wait $DIALWAIT seconds"
		TRIES=$[ TRIES + 1 ]
		WAIT=0
		while ! [ $WAIT = $DIALWAIT ] ; do
			sleep 1
			WAIT=$[ WAIT + 1 ]
			echo -n "."

			# Check if online
			if { imontty | grep -i "outgoing" } ; then 
				START=1
				if [ $START = 1 ] ; then break; fi; 	
			fi;
		done
		if [ $START = 1 ] ; then break; fi; 	
		echo "[$TRIES/$ISDNDIALMAX]"
	done

	if ! [ $START = 1 ] ; then 	
		echo -e "\aDial Up Without Success!"
    		$ISDNCTRLBIN hangup $DIALDEVICE
		exit 1; 
	fi;

	echo "Dial Up Succeeded!"
   
	if [ $DIALDEVICE = $ISDNDEVICE ] ; then 
		echo "Set Default-Route to ISDN"
		$SYSPATH/route add default netmask 0.0.0.0 dev $DIALDEVICE

		# Change software link to another resolv.conf,         	
		# which has other DNS entries             	
		echo "Change 'resolv.conf' to PPP usage"
		ln -f -s /etc/resolv.conf.ppp /etc/resolv.conf
	fi
	
	echo "ISDN Device $DIALDEVICE Is Dialed Up"
	;;
  stop)
	echo "Hang Up ISDN Device $DIALDEVICE"
    
	# HangUp
    	$ISDNCTRLBIN hangup $DIALDEVICE

	if [ $DIALDEVICE = $ISDNDEVICE ] ; then 
		echo "Change 'resolv.conf' to normal usage"
		ln -f -s /etc/config/resolv.conf /etc/resolv.conf

		echo "Delete all routes to ISDN"
    		$DELALLIP4ROUTES $DIALDEVICE
	fi

	echo "ISDN Device $DIALDEVICE Is Hanged Up"
	;;
  sleep)
	echo "Hang Up ISDN Device $DIALDEVICE, but route to ISDN is up (autodial)"
	
	# HangUp
	$ISDNCTRLBIN hangup $DIALDEVICE

	echo "ISDN Device $DIALDEVICE Is Sleeping"
	
	;;
  *)
	echo "Syntax: isdn.dial {start|stop|sleep} <isdn-device>"
	exit 1
esac

#set +x

exit 0