set_3g_led() {
	# set on WRT54G3G only
	[ -d /proc/diag ] || return 0
	grep WRT54G3G /proc/diag/model >/dev/null || return 0
	echo "$1" > /proc/diag/led/3g_green
	echo "$2" > /proc/diag/led/3g_blue
	echo "$3" > /proc/diag/led/3g_blink
}

scan_3g() {
	local device

	scan_ppp "$@"
	config_get device "$1" device

	# enable 3G with the 3G button by default
	config_get button "$1" button
	[ -z "$button" ] && {
		config_set "$1" button 1
	}
}

stop_interface_3g() {
	set_3g_led 0 0 0
}

setup_interface_3g() {
	local iface="$1"
	local config="$2"

	config_get device "$config" device
	config_get maxwait "$config" maxwait
	maxwait=${maxwait:-20}
	while [ ! -e "$device" -a $maxwait -gt 0 ];do # wait for driver loading to catch up
		maxwait=$(($maxwait - 1))
		sleep 1
	done

	config_get apn "$config" apn
	config_get service "$config" service
	config_get pincode "$config" pincode
	config_get mtu "$config" mtu
	config_get password "$config" password
	config_get username "$config" username

	case "$service" in
		cdma|gprs*) ledcode="1 0";;
		evdo|umts*) ledcode="0 1";;
		*)	ledcode="0 0";;	#shouldn't happen
	esac

	set_3g_led $ledcode 1

	#Check to see if it is an HSO or a regular USB device
	if grep "Vendor=0af0" < /proc/bus/usb/devices 2>&- >&- ; then

		for module in rfkill hso; do
			/sbin/insmod $module 2>&- >&-
		done

		RESOLV_CONF="/tmp/resolv.conf.auto"
		DATA=$(USE_PASS="$password" USE_USER="$username" USE_APN="$apn" SERVICE="$service" PINCODE="$pincode" /usr/bin/gcom -d "$device" -s /etc/gcom/hso-connect.gcom)
		DATA=$(echo $DATA | tr -d " " | grep -v ^$)
		IP=$(echo $DATA | cut -d , -f 2)
		NS1=$(echo $DATA | cut -d , -f 4)
		NS2=$(echo $DATA | cut -d , -f 5)
		ifconfig hso0 $IP netmask 255.255.255.255 up
		route add default dev hso0
		echo "#Configured by HSO" > $RESOLV_CONF
		[ -n "$NS1" ] && echo "nameserver	$NS1" >> $RESOLV_CONF
		[ -n "$NS2" ] && echo "nameserver	$NS2" >> $RESOLV_CONF
		env -i ACTION="ifup" INTERFACE="wan" DEVICE="hso0" PROTO=hso /sbin/hotplug-call "iface"

	else

		for module in usbserial option crc-ccitt slhc ppp_generic ppp_async; do
			/sbin/insmod $module 2>&- >&-
		done

		config_set "$config" "connect" "USE_APN=$apn SERVICE=$service PINCODE=$pincode /usr/bin/gcom -s -d $device /etc/gcom/3g.gcom"
		start_pppd "$config" \
			novj \
			nobsdcomp \
			noauth \
			crtscts \
			updetach \
			${mtu:+mtu $mtu mru $mtu} \
			460800 "$device"
	fi

	set_3g_led $ledcode 0
}