#!/bin/sh

# $DIALD_LINK is the name of the link we are connecting.
# $DIALD_DEVICE is the device we are calling out on.

#CFG_SCRIPTS='/usr/share/diald'
CFG_SCRIPTS='/etc/diald/scripts'
CFG_DEVICE='/etc/diald/device.conf'
CFG_LINK="/etc/diald/link"
CFG_SEQ='/var/run'

# $DIALD_DEVTYPE is a sanitized version of $DIALD_DEVICE.
case "$DIALD_DEVICE" in
	ippp*)	DIALD_DEVTYPE='isdn' ;;
	isdn*)	DIALD_DEVTYPE='isdn' ;;
	*)	DIALD_DEVTYPE='modem' ;;
esac


connect()
{
	status=0

	# If this device has a dial script we use it to bring up
	# the physical link.
	if [ -n "$dial_script"  -a "$dial_script" != '-' ]; then
		"$CFG_SCRIPTS/$dial_script"
		status=$?
		if [ $status -ne 0 ]; then
			exit $status
		fi
	fi

	# If we need to do some form of login when connecting this
	# link over this device, do it now.
	if [ -n "$LOGIN"  -a "$LOGIN" != '-' ]; then
		"$CFG_SCRIPTS/login/$LOGIN"
		status=$?
	fi

	# If everything worked we start from the beginning of the
	# list again next time
	if [ $status -eq 0 ]; then
		echo 1 > "$CFG_SEQ/dialdseq.$DIALD_LINK"
	fi

	exit $status
}


# Save stdin, we need it later if we are dialling a modem.
exec 9<&0

# Find out what dial script to use on this device.
exec < "$CFG_DEVICE"
gotdev=
while read dev dial_script dial_args
do
	# Ignore blank lines and comments.
	case "$dev" in
		'#'*|'')
			continue ;;
	esac

	if [ "$dev" = "$DIALD_DEVICE" -o "$dev" = "$DIALD_DEVTYPE" ]; then
		gotdev=1
		break
	fi
done
if [ -z "$gotdev" ]; then
	echo "<3>No entry for $DIALD_DEVICE, type $DIALD_DEVTYPE in $CFG_DEVICE"
	exit 1
fi


seq=0
if [ -r "$CFG_SEQ/dialdseq.$DIALD_LINK" ]; then
	seq=`cat "$CFG_SEQ/dialdseq.$DIALD_LINK"`
fi
seq=`expr $seq + 1`
echo $seq > "$CFG_SEQ/dialdseq.$DIALD_LINK"


passes=2
while [ $passes -gt 0 ]; do
	passes=`expr $passes - 1`

	exec < "$CFG_LINK"
	dev_type=
	link_params=
	base_params=
	counted=0
	while read dev_type link_params
	do
		# Ignore blank lines and comments.
		case "$dev_type" in
			'#'*|'')
				continue ;;
		esac

		if [ "$dev_type" = '=' ]; then
			base_params="$link_params"
		elif [ "$dev_type" = '+' ]; then
			base_params="$base_params $link_params"
		elif [ "$dev_type" = "$DIALD_DEVICE" \
		-o "$dev_type" = "$DIALD_DEVTYPE" ]; then
			counted=`expr $counted + 1`
			seq=`expr $seq - 1`
			if [ $seq -eq 0 ]; then
				passes=0
				exec 0<&9
				eval "$dial_args $base_params $link_params connect"
				exit $?
			fi
		fi
	done

	# If no entries match there is a problem
	if [ $counted -eq 0 ]; then
		echo "<3>No entry for $DIALD_DEVICE, type $DIALD_DEVTYPE in $CFG_LINK"
		exit 1
	fi

	# One or more entries exists, we have just run off the end
	# of the list so we have to start again from the top.
	echo 1 > "$CFG_SEQ/dialdseq.$DIALD_LINK"
	seq=1
done

exit 1