#!/bin/bash
#
#
# Copyright (c) 2017 Igor Pecovnik, igor.pecovnik@gma**.com
#
# This file is licensed under the terms of the GNU General Public
# License version 2. This program is licensed "as is" without any
# warranty of any kind, whether express or implied.

[[ -n ${SUDO_USER} ]] && SUDO="sudo "

function jobs ()
{
	# Shows box with loading ...
	#
	dialog --backtitle "$BACKTITLE" --title " Please wait " --infobox "\nLoading ${selection,,} submodule ... " 5 $((26+${#selection}))
	case $1 in

	#-------------------------------------------------------------------------------------------------------------------------------------#


	# Application installer
	#
	"Softy" )
		[[ -f softy ]] && ./softy || softy
	;;

	# Remove BT
	#
	"BT remove" )
		if ! is_package_manager_running; then
			debconf-apt-progress -- apt-get -y remove bluetooth bluez bluez-tools
			check_if_installed xserver-xorg && debconf-apt-progress -- apt-get -y remove pulseaudio-module-bluetooth blueman
			debconf-apt-progress -- apt -y -qq autoremove
		fi
	;;

	# Enabling BT
	#
	"BT install" )
		if ! is_package_manager_running; then
			debconf-apt-progress -- apt-get -y install bluetooth bluez bluez-tools
			check_if_installed xserver-xorg && debconf-apt-progress -- apt-get -y --no-install-recommends install pulseaudio-module-bluetooth blueman
		fi
	;;

	# Removing IR
	#
	"Remove IR" )
		if ! is_package_manager_running; then
			debconf-apt-progress -- apt-get -y remove lirc
			debconf-apt-progress -- apt -y -qq autoremove
		fi
	;;

	# Enabling IR
	#
	"IR" )
		if ! is_package_manager_running; then
			debconf-apt-progress -- apt-get -y --no-install-recommends install lirc
		fi
	;;


	# Sharing USB ports
	#
	"USB redirector" )
		if [[ -n $(netstat -lnt | awk '$6 == "LISTEN" && $4 ~ ".'32032'"') ]]; then
			[[ -f /usr/local/usb-redirector/uninstall.sh ]] && /usr/local/usb-redirector/uninstall.sh uninstall
			rm -f /usr/local/bin/usbclnt
		else
			TARGET_BRANCH=$BRANCH
			exceptions "$BRANCH"
			IFS='.' read -a array <<< $(uname -r)
			[[ -z $(dpkg -l | grep linux-headers) ]] && debconf-apt-progress -- apt-get -y \
			install linux-headers${TARGET_BRANCH}-${TARGET_FAMILY}
			rm -rf /usr/src/usb-redirector-linux-arm-eabi
			if (( "${array[0]}" == "4" )) && (( "${array[1]}" >= "1" )); then
				wget -qO- http://www.incentivespro.com/usb-redirector-linux-arm-eabi.tar.gz | tar xz -C /usr/src
			else
				wget -qO- https://raw.githubusercontent.com/armbian/build/master/packages/blobs/usb-redirector/usb-redirector-old.tgz \
				| tar xz -C /usr/src
			fi
			cd /usr/src/usb-redirector-linux-arm-eabi/
			./installer.sh install
			sleep 3
			check_port "32032" "USB Redirector"
		fi
	;;


	# Simple CLI monitoring
	#
	"Monitor" )
		clear
		armbianmonitor -m
		sleep 2
	;;


	# Send diagnostics
	#
	"Diagnostics" )
		clear
		armbianmonitor -u
		echo ""
		read -n 1 -s -p "Press any key to continue"
	;;


	# Control board consumption
	#
	"Consumption" )
		clear
		h3consumption
		echo -e "\nType \e[92m${SUDO}${0##*/}\e[0m to get back\n"
		exit
	;;


	# Board (fex) settings editor
	#
	"Fexedit" )
		exec 3>&1
		monitor=$(dialog --print-maxsize 2>&1 1>&3)
		exec 3>&-
		mon_x=$(echo $monitor | awk '{print $2}' | sed 's/,//')
		mon_y=$(echo $monitor | awk '{print $3}' | sed 's/,//')
		TEMP=$(mktemp -d || exit 1)
		trap "rm -rf \"${TEMP}\" ; exit 0" 0 1 2 3 15
		bin2fex /boot/script.bin ${TEMP}/tempfex.txt >/dev/null 2>&1
		dialog --title "Edit u-boot environment" \
		--ok-label "Save" --no-collapse --editbox ${TEMP}/tempfex.txt $mon_y 0 2> ${TEMP}/tempfex.out
		[[ $? = 0 ]] && fex2bin ${TEMP}/tempfex.out /boot/script.bin
	;;




	#
	# Install kernel headers
	#
	"Headers" )
		if ! is_package_manager_running; then
			TARGET_BRANCH=$BRANCH
			exceptions "$BRANCH"
			REMOVE_PKG="linux-headers-*"
			if [[ -f /etc/armbian-release ]]; then
				INSTALL_PKG="linux-headers${TARGET_BRANCH}-${TARGET_FAMILY}";
				else
				INSTALL_PKG="linux-headers-$(uname -r | sed 's/'-$(dpkg --print-architecture)'//')";
			fi
			if [[ -n $(dpkg -l | grep linux-headers) ]]; then
					debconf-apt-progress -- apt-get -y purge ${REMOVE_PKG}
			else
					debconf-apt-progress -- apt-get -y install ${INSTALL_PKG}
			fi
			# cleanup
			debconf-apt-progress -- apt -y autoremove
		fi
	;;




	#
        # Install kernel source
        #
        "Source" )
                if ! is_package_manager_running; then
                        if [[ -n $(dpkg -l | grep $SOURCE_PKG) ]]; then
                                        debconf-apt-progress -- apt-get -y purge ${SOURCE_PKG}
					# cleanup
		                        debconf-apt-progress -- apt -y autoremove
                        else
                                        debconf-apt-progress -- apt-get -y install ${SOURCE_PKG}
					dialog --colors --backtitle "$BACKTITLE" --no-collapse --title " Kernel source " --clear --msgbox "\nYou will find compressed kernel source and configuration in /usr/src" 7 72
                        fi
                fi
        ;;




	# Toggle mini and full firmware
	#
	"Full"|"Mini" )
		if ! is_package_manager_running; then
			debconf-apt-progress -- apt-get -y purge armbian-firmware* # workaround since pkg replace deesn't work properly
			debconf-apt-progress -- apt-get -y install armbian-firmware$(echo -"${1,,}" | sed 's/-mini//')
		fi
	;;


	# Set the display resolution
	#
	"Display" )
		# show display modes menu
		if [[ -f /usr/bin/h3disp ]]; then
			# h3 boards
			get_h3modes
			dialog --title " Display output type " --colors --help-button --help-label "Cancel" --no-label "DVI" --yes-label "HDMI" \
			--backtitle "$BACKTITLE" --yesno "\nIn case you use an HDMI-to-DVI converter choose DVI!" 7 57
			output_type=$?
			if [[ $output_type = 0 || $output_type = 1 ]]; then
				if [[ $output_type = 0 ]]; then
					display_cmd="h3disp -m $SCREEN_RESOLUTION";
					else
					display_cmd="h3disp -m $SCREEN_RESOLUTION -d";
				fi


			fi
		elif [[ "$LINUXFAMILY" = odroidc* ]]; then
			get_odroidmodes
			display_cmd="sed -i \"s/^setenv m .*/# &/\" /boot/boot.ini;sed -i '/setenv m \"$SCREEN_RESOLUTION\"/s/^# //g' /boot/boot.ini";
		else
			# a20 boards
			get_a20modes
			display_cmd="sed -i \"s/^disp_mode=.*/disp_mode=$SCREEN_RESOLUTION/\" /boot/armbianEnv.txt";
		fi

		dialog --title " Display resolution " --colors --no-label "Cancel" --backtitle "$BACKTITLE" --yesno \
		"\nSwitching to \Z1$SCREEN_RESOLUTION\Z0 and reboot?" 7 42
		if [[ $? = 0 ]]; then
			eval $display_cmd > /dev/null
			reboot
		fi
	;;


	#-------------------------------------------------------------------------------------------------------------------------------------#
	#-------------------------------------------------------------------------------------------------------------------------------------#
	#-------------------------------------------------------------------------------------------------------------------------------------#



	# Select dynamic or edit static IP address
	#
	"IP" )
			# check if we have systemd networking in action
			SYSTEMDNET=$(service systemd-networkd status | grep -w active | grep -w running)
			dialog --title " IP address assignment " --colors --backtitle "$BACKTITLE" --help-button --help-label "Cancel" \
			--yes-label "DHCP" --no-label "Static" --yesno \
			"\n\Z1DHCP:\Z0   automatic IP asignment by your router or DHCP server\n\n\Z1Static:\Z0 manually fixed IP address" 9 70
			exitstatus=$?;

			# dynamic
			if [[ $exitstatus = 0 ]]; then
				if [[ -n $SYSTEMDNET ]]; then
					filename="/etc/systemd/network/10-${DEFAULT_ADAPTER}.network"
					if [[ -f $filename ]]; then
						sed -i '/Network/,$d' $filename
						echo -e "[Network]" >>$filename
						echo -e "DHCP=ipv4" >>$filename
					fi
				else
					if [[ -n $(LC_ALL=C nmcli device status | grep $DEFAULT_ADAPTER | grep connected) ]]; then
						nmcli connection delete uuid $(LC_ALL=C nmcli -f UUID,DEVICE connection show | grep $DEFAULT_ADAPTER | awk '{print $1}') >/dev/null 2>&1
						nmcli con add con-name "Armbian ethernet" type ethernet ifname $DEFAULT_ADAPTER >/dev/null 2>&1
						nmcli con up "Armbian ethernet" >/dev/null 2>&1
						else
						create_if_config "$DEFAULT_ADAPTER" "$DEFAULT_ADAPTER" "dynamic" > /etc/network/interfaces
					fi
				fi
			fi

			# static
			if [[ $exitstatus = 1 ]]; then
				create_if_config "$DEFAULT_ADAPTER" "$DEFAULT_ADAPTER" "fixed" > /dev/null
				if [[ -n $SYSTEMDNET ]]; then
					systemd_ip_editor "${DEFAULT_ADAPTER}"
				else
					if [[ -n $(LC_ALL=C nmcli device status | grep $DEFAULT_ADAPTER | grep connected) ]]; then
						nm_ip_editor "$DEFAULT_ADAPTER"
					else
						ip_editor "$DEFAULT_ADAPTER" "$DEFAULT_ADAPTER" "/etc/network/interfaces"
					fi
				fi
			fi
	;;

	# Start network performance daemon
	#
	"Iperf3" )
			#
			if pgrep -x "iperf3" > /dev/null
			then
				pkill iperf3
			else
				iperf3 -s -D
			fi
	;;


	# Toogle IPV6
	#
	"IPV6" )
			#
			sed -i --follow-symlinks '/^net.ipv6.conf*/d' /etc/sysctl.d/99-sysctl.conf
			if [ -f "/etc/apt/apt.conf.d/99force-ipv4" ]; then
				rm /etc/apt/apt.conf.d/99force-ipv4
				echo 'net.ipv6.conf.all.disable_ipv6 = 0' >> /etc/sysctl.d/99-sysctl.conf
				echo 'net.ipv6.conf.default.disable_ipv6 = 0' >> /etc/sysctl.d/99-sysctl.conf
				echo 'net.ipv6.conf.lo.disable_ipv6 = 0' >> /etc/sysctl.d/99-sysctl.conf
			else
				echo 'Acquire::ForceIPv4 "true";' > /etc/apt/apt.conf.d/99force-ipv4
				echo 'net.ipv6.conf.all.disable_ipv6 = 1' >> /etc/sysctl.d/99-sysctl.conf
				echo 'net.ipv6.conf.default.disable_ipv6 = 1' >> /etc/sysctl.d/99-sysctl.conf
				echo 'net.ipv6.conf.lo.disable_ipv6 = 1' >> /etc/sysctl.d/99-sysctl.conf
			fi
			sysctl -p > /dev/null
	;;


	# Connect to wireless access point
	#
	"WiFi" )
			# disable AP mode on certain adapters
			wlan_exceptions "off"
			[[ "$reboot_module" == true ]] && dialog --backtitle "$BACKTITLE" --title " Warning " --msgbox "\nReboot is required for this adapter to switch to STA mode" 7 62 && reboot
			nmtui-connect
	;;


	# Connect to 3G/4G network
	#
	"LTE" )
			if [[ $LTE_MODEM == *online* ]]; then
				dialog --title " LTE modem is connected " --colors --backtitle "$BACKTITLE" --yes-label "Back" --no-label "Disconnect" --yesno "\n\Z1Disconnect:\Z0 kill mobile connection\n\n" 7 42
				[[ $? = 1 ]] && lte "$LTE_MODEM_ID" "off"
			else
				dialog --title " LTE modem is disconnected " --colors --backtitle "$BACKTITLE" --yes-label "Back" --no-label "Connect" --yesno "\n\Z1Connect:\Z0 dial mobile connection\n\n" 7 42
				[[ $? = 1 ]] && lte "$LTE_MODEM_ID" "on"
			fi
	;;


	# Connect to wireless access point
	#
	"Clear" )
			# remove managed interfaces
			systemctl daemon-reload
			sed 's/interface-name:wl.*//' -i /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
			sed 's/,$//' -i /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
			rm -f /etc/network/interfaces.d/armbian.ap.nat
			rm -f /etc/network/interfaces.d/armbian.ap.bridge
			reload-nety
	;;


	# Create WiFi access point
	#
	"Hotspot" )
	if ! is_package_manager_running; then
		systemctl daemon-reload
		CURRENT_UUID=$(LC_ALL=C nmcli -f DEVICE,TYPE,STATE device status | grep -w " wifi " | grep -w " disconnected")
		if [[ -n $(service hostapd status | grep -w active | grep -w running) ]]; then
			if [[ -n $HOSTAPDBRIDGE ]]; then
				dialog --title " Hostapd service is running " --colors --backtitle "$BACKTITLE" --help-button \
				--help-label "Cancel" --yes-label "Stop and reboot" --no-label "Edit" --yesno \
				"\n\Z1Stop:\Z0 stop and reboot\n\n\Z1Edit:\Z0 change basic parameters: SSID, password and channel" 9 70

			else
				dialog --title " Hostapd service is running " --colors --backtitle "$BACKTITLE" --help-button \
				--help-label "Cancel" --yes-label  "Stop" --no-label "Edit" --yesno \
				"\n\Z1Stop:\Z0 stop providing Access Point\n\n\Z1Edit:\Z0 change basic parameters: SSID, password and channel" 9 70
			fi
			exitstatus=$?;
			if [[ $exitstatus = 0 ]]; then
				dialog --backtitle "$BACKTITLE" --title " Please wait " --infobox "\nDisabling hotstop. Please wait!" 5 35
				sed -i "s/^DAEMON_CONF=.*/DAEMON_CONF=/" /etc/init.d/hostapd
				# disable DNS
				systemctl daemon-reload
				systemctl disable dnsmasq.service >/dev/null 2>&1

				ifdown $WIRELESS_ADAPTER 2> /dev/null
				rm -f /etc/network/interfaces.d/armbian.ap.nat
				rm -f /etc/network/interfaces.d/armbian.ap.bridge
				rm -f /var/run/hostapd/* >/dev/null 2>&1
				sed -i '/^iptables/ d' /etc/rc.local
				sed -i '/^service dnsmasq/ d' /etc/rc.local
				sed 's/interface-name:wl.*//' -i /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
				sed 's/,$//' -i /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
				iptables -F
				# reload services
				reload-nety
				[[ -n $HOSTAPDBRIDGE ]] && reboot
			fi
			if [[ $exitstatus = 1 ]]; then wlan_edit; reload-nety "reload"; fi
		elif [[ -z $CURRENT_UUID ]]; then
				dialog --title " Info " --backtitle "$BACKTITLE" --no-collapse --msgbox "\nAll wireless connections are in use." 7 40
		else
				# check for low quality drivers and combinations
				check_and_warn

				# remove interfaces from managed list
				if [[ -f /etc/NetworkManager/conf.d/10-ignore-interfaces.conf ]]; then
					sed 's/interface-name:wl.*//' -i /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
					sed 's/,$//' -i /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
				fi

				# clear current settings
				rm -f /etc/network/interfaces.d/armbian.ap.nat
				rm -f /etc/network/interfaces.d/armbian.ap.bridge
				service networking restart
				service network-manager restart
				{ for ((i = 0 ; i <= 100 ; i+=20)); do sleep 1; echo $i; done } | dialog --title " Initializing wireless adapters " --colors --gauge "" 5 50 0

				# start with basic config
				if grep -q "^## IEEE 802.11ac" /etc/hostapd.conf; then sed '/## IEEE 802.11ac\>/,/^## IEEE 802.11ac\>/ s/.*/#&/' -i /etc/hostapd.conf; fi
				if grep -q "^## IEEE 802.11a" /etc/hostapd.conf; then sed '/## IEEE 802.11a\>/,/^## IEEE 802.11a\>/ s/.*/#&/' -i /etc/hostapd.conf; fi
				if grep -q "^## IEEE 802.11n" /etc/hostapd.conf; then sed '/## IEEE 802.11n/,/^## IEEE 802.11n/ s/.*/#&/' -i /etc/hostapd.conf; fi
				sed -i "s/^channel=.*/channel=5/" /etc/hostapd.conf

				service network-manager reload
				# change special adapters to AP mode
				wlan_exceptions "on"
				# check for WLAN interfaces
				get_wlan_interface
				# add interface to unmanaged list
				if [[ -f /etc/NetworkManager/conf.d/10-ignore-interfaces.conf ]]; then
					[[ -z $(grep -w unmanaged-devices= /etc/NetworkManager/conf.d/10-ignore-interfaces.conf) ]] && sed '$ s/$/,/' -i /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
					sed '$ s/$/'"interface-name:$WIRELESS_ADAPTER"'/' -i /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
				else
					echo "[keyfile]" > /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
					echo "unmanaged-devices=interface-name:$WIRELESS_ADAPTER" >> /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
				fi
				service network-manager reload
				# display dialog
				dialog --colors --backtitle "$BACKTITLE" --title "Please wait" --infobox \
				"\nWireless adapter: \Z1${WIRELESS_ADAPTER}\Z0\n\nProbing nl80211 hostapd driver compatibility." 7 50
				debconf-apt-progress -- apt-get --reinstall -o Dpkg::Options::="--force-confnew" -y -qq --no-install-recommends install hostapd
				# change to selected interface
				sed -i "s/^interface=.*/interface=$WIRELESS_ADAPTER/" /etc/hostapd.conf
				# add hostapd.conf to services
				sed -i "s/^DAEMON_CONF=.*/DAEMON_CONF=\/etc\/hostapd.conf/" /etc/init.d/hostapd
				# check both options
				# add allow cli access if not exists. temporally
				if ! grep -q "ctrl_interface" /etc/hostapd.conf; then
					echo "" >> /etc/hostapd.conf
					echo "ctrl_interface=/var/run/hostapd" >> /etc/hostapd.conf
					echo "ctrl_interface_group=0" >> /etc/hostapd.conf
				fi
				#
				check_advanced_modes
				#
				if [[ -n "$hostapd_error" ]]; then
					dialog --colors --backtitle "$BACKTITLE" --title "Please wait" --infobox \
					"\nWireless adapter: \Z1${WIRELESS_ADAPTER}\Z0\n\nProbing Realtek hostapd driver compatibility." 7 50
					debconf-apt-progress -- apt-get --reinstall -o Dpkg::Options::="--force-confnew" -y -qq --no-install-recommends install hostapd-realtek
					# change to selected interface
					sed -i "s/^interface=.*/interface=$WIRELESS_ADAPTER/" /etc/hostapd.conf
					# add allow cli access if not exists. temporally
					if ! grep -q "ctrl_interface" /etc/hostapd.conf; then
						echo "ctrl_interface=/var/run/hostapd" >> /etc/hostapd.conf
						echo "ctrl_interface_group=0" >> /etc/hostapd.conf
					fi
					#
					check_advanced_modes
					#
				fi

				if [[ -n "$hostapd_error" ]]; then
					dialog --backtitle "$BACKTITLE" --title "Warning" \
					--infobox "\nWireless adapter: $WIRELESS_ADAPTER\n\nNo compatible hostapd driver found." 7 39
					sed -i "s/^DAEMON_CONF=.*/DAEMON_CONF=/" /etc/init.d/hostapd
					# remove interfaces from managed list
					sed 's/interface-name:wl.*//' -i /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
					sed 's/,$//' -i /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
					systemctl daemon-reload;service hostapd restart
				fi

				# let's remove bridge out for this simple configurator
				#
				# dialog --title " Choose Access Point mode for $WIRELESS_ADAPTER " --colors --backtitle "$BACKTITLE" --no-label "Bridge" \
				# --yes-label "NAT" --yesno "\n\Z1NAT:\Z0 with own DHCP server, out of your primary network\n\
				# \n\Z1Bridge:\Z0 wireless clients will use your routers DHCP server" 9 70
				# response=$?
				#
				# let's remove bridge out for this simple configurator

				response=0

				# create interfaces file if not exits
				[[ ! -f /etc/network/interfaces ]] && echo "source /etc/network/interfaces.d/*" > /etc/network/interfaces

				# select default interfaces if there is more than one
				select_default_interface

				NETWORK_CONF="/etc/network/interfaces"

				case $response in
					# bridge
					1)
						TEMP_CONF="/etc/network/interfaces.d/armbian.ap.bridge"

						sed -i 's/.bridge=.*/bridge=br0/' /etc/hostapd.conf
						if [[ $DEFAULT_ADAPTER == "br0" ]]; then NEW_DEFAULT_ADAPTER="eth0"; else NEW_DEFAULT_ADAPTER="$DEFAULT_ADAPTER"; fi
						echo -e "#bridged wireless for hostapd by armbian-config\n" > $TEMP_CONF
						echo -e "auto lo br0\niface lo inet loopback" >> $TEMP_CONF
						echo -e "\nauto $NEW_DEFAULT_ADAPTER\nallow-hotplug $NEW_DEFAULT_ADAPTER\niface $NEW_DEFAULT_ADAPTER inet manual" >> $TEMP_CONF
						echo -e "\nauto $WIRELESS_ADAPTER\nallow-hotplug $WIRELESS_ADAPTER\niface $WIRELESS_ADAPTER inet manual\n" >> $TEMP_CONF
						create_if_config "$DEFAULT_ADAPTER" "br0" >> $TEMP_CONF
						echo -e "\nbridge_ports $NEW_DEFAULT_ADAPTER $WIRELESS_ADAPTER" >> $TEMP_CONF

					;;
					# NAT
					0)
						TEMP_CONF="/etc/network/interfaces.d/armbian.ap.nat"

						# install dnsmas and iptables
						if [[ $(dpkg-query -W -f='${db:Status-Abbrev}\n' dnsmasq 2>/dev/null) != "*ii*" ]]; then
							debconf-apt-progress -- apt-get -qq -y --no-install-recommends install dnsmasq;
						fi

						echo -e "# armbian NAT hostapd\nallow-hotplug $WIRELESS_ADAPTER\niface $WIRELESS_ADAPTER inet static " > $TEMP_CONF
						echo -e "\taddress 172.24.1.1\n\tnetmask 255.255.255.0\n\tnetwork 172.24.1.0\n\tbroadcast 172.24.1.255" >> $TEMP_CONF
						# create new configuration
						echo "interface=$WIRELESS_ADAPTER				# Use interface $WIRELESS_ADAPTER" > /etc/dnsmasq.conf
						echo "listen-address=172.24.1.1					# Explicitly specify the address to listen on" >> /etc/dnsmasq.conf
						echo "bind-interfaces							# Bind to the interface to make sure we aren't sending \
						things elsewhere" >> /etc/dnsmasq.conf
						echo "server=8.8.8.8							# Forward DNS requests to Google DNS" >> /etc/dnsmasq.conf
						echo "domain-needed								# Don't forward short names" >> /etc/dnsmasq.conf
						echo "bogus-priv								# Never forward addresses in the non-routed address spaces" \
						>> /etc/dnsmasq.conf
						echo "dhcp-range=172.24.1.50,172.24.1.150,12h	# Assign IP addresses between 172.24.1.50 and 172.24.1.150 with \
						a 12 hour lease time" >> /etc/dnsmasq.conf
						# - Enable IPv4 forwarding
						sed -i "/net.ipv4.ip_forward=/c\net.ipv4.ip_forward=1" /etc/sysctl.conf
						echo 1 > /proc/sys/net/ipv4/ip_forward
						# - Apply iptables
						iptables -t nat -A POSTROUTING -o $DEFAULT_ADAPTER -j MASQUERADE
						iptables -A FORWARD -i $DEFAULT_ADAPTER -o $WIRELESS_ADAPTER -m state --state RELATED,ESTABLISHED -j ACCEPT
						iptables -A FORWARD -i $WIRELESS_ADAPTER -o $DEFAULT_ADAPTER -j ACCEPT
						# - Save IP tables, applied during ifup in /etc/network/interfaces.
						iptables-save > /etc/iptables.ipv4.nat
						sed -i 's/^bridge=.*/#&/' /etc/hostapd.conf
						sed -e 's/exit 0//g' -i /etc/rc.local
						# workaround if hostapd is too slow
						echo "service dnsmasq start" >> /etc/rc.local
						echo "iptables-restore < /etc/iptables.ipv4.nat" >> /etc/rc.local
						echo "exit 0" >> /etc/rc.local
					;;
				3)exit;;

				255) exit;;
				esac

				dialog --backtitle "$BACKTITLE" --title " Please wait " --infobox "\nEnabling hotspot. Please wait!" 5 34

				#
				# only for bridged connection we need to check and reboot. tdlr check if it can be done on the fly
				HOSTAPDBRIDGE=$(cat /etc/hostapd.conf 2> /dev/null | grep -w "^bridge=br0")
				if [[ -n $HOSTAPDBRIDGE ]]; then
						dialog --title "Manually adjust network configuration if needed" --backtitle "$BACKTITLE" \
						--ok-label "Reboot to apply new settings" --no-collapse --editbox $TEMP_CONF 30 0 2> $TEMP_CONF".tmp"
						response=$?
						if [[ $response = 0 ]]; then
							mv $TEMP_CONF".tmp" $TEMP_CONF
							#reboot
						fi
					else
						ifdown $WIRELESS_ADAPTER 2> /dev/null
						sleep 2
						ifup $WIRELESS_ADAPTER 2> /dev/null
						echo "nameserver 8.8.8.8" > /etc/resolvconf/resolv.conf.d/base
						[[ "$reboot_module" == true ]] && dialog --backtitle "$BACKTITLE" --title " Warning " --msgbox "\nReboot is required for this adapter to switch to AP mode" 7 61 && reboot
						# reload services
						reload-nety "reload"
				fi
		fi
	fi
	;;


	# Manage Softether VPN
	#
	"VPN" )
	VPNDIR="/usr/local/vpnclient/"

	function vpn_reconfigure ()
	{
	if [[ -f /etc/server.vpn ]]; then
		${VPNDIR}vpnclient stop >/dev/null 2>&1
		${VPNDIR}vpnclient start >/dev/null 2>&1
		# purge old settings
		${VPNDIR}vpncmd /client localhost /cmd accountlist | grep "VPN Connection Setting Name" | cut -d "|" -f 2 | sed 's/^/"/;s/$/"/' | xargs /usr/local/vpnclient/vpncmd /client localhost /cmd accountdisconnect >/dev/null 2>&1
		${VPNDIR}vpncmd /client localhost /cmd accountlist | grep "VPN Connection Setting Name" | cut -d "|" -f 2 | sed 's/^/"/;s/$/"/' | xargs /usr/local/vpnclient/vpncmd /client localhost /cmd accountdelete >/dev/null 2>&1
		# import new
		${VPNDIR}vpncmd /client localhost /cmd accountimport //etc//server.vpn >/dev/null 2>&1
		# reload to connect
		${VPNDIR}vpnclient stop >/dev/null 2>&1
		${VPNDIR}vpnclient start >/dev/null 2>&1
		[[ $? = 0 ]] && dialog --backtitle "$BACKTITLE" --title " VPN " --msgbox "\nConfiguration was succesfully imported!" 7 43
	fi
	}

	function get_numbers {
		EXCLUDE=$(ip neigh | grep vpn_se | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.' | head -1)
		ADAPTER=$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | grep -v vpn_se | head -1)
		IP=$(ip route | grep $ADAPTER | grep default | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}' | head -1)
		VPNSERVERIP=$(${VPNDIR}vpncmd /client localhost /cmd accountlist | grep "VPN Server" |grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}' | head -1)
		SUBNET=$(ifconfig vpn_se | grep 'inet addr:' | grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1}' | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}')
		GW=$(ip neigh | grep vpn_se | grep $SUBNET | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}' | head -1)
	}

	function raise_dev {
			i=0;
			while [[ -z "$TEMP" && $i<5 ]]; do
					TEMP=$(${VPNDIR}vpncmd /client localhost /cmd accountlist | grep Status | grep Connected)
					sleep 1
					i=$((i+1))
			done
			dhclient vpn_se
	}

	if pgrep -x "vpnclient" > /dev/null
	then
				${VPNDIR}vpnclient stop >/dev/null 2>&1
				${VPNDIR}vpnclient start >/dev/null 2>&1
				if [[ -z $(${VPNDIR}vpncmd /client localhost /cmd nicList | grep Enabled) ]]; then
					${VPNDIR}vpncmd /client localhost /cmd niccreate se >/dev/null 2>&1
				fi
				if [[ -z $(${VPNDIR}vpncmd /client localhost /cmd accountlist | grep "VPN Server") ]]; then
					dialog --backtitle "$BACKTITLE" --no-label " Cancel " --yes-label " Import " --title " VPN " --yesno "\nVPN configuration was not found.\n\nPlace file to /etc/server.vpn" 9 45
					if [[ $? = 0 && -f /etc/server.vpn ]]; then
						${VPNDIR}vpncmd /client localhost /cmd accountimport //etc//server.vpn >/dev/null 2>&1
						${VPNDIR}vpnclient stop >/dev/null 2>&1
						${VPNDIR}vpnclient start >/dev/null 2>&1
						[[ $? = 0 ]] && dialog --backtitle "$BACKTITLE" --title " VPN " --msgbox "\nConfiguration was succesfully imported!" 7 43
					fi
				fi

				# raise devices
				raise_dev

				if [[ -n $(${VPNDIR}vpncmd /client localhost /cmd accountlist | grep Status | grep Connected) ]]; then
					get_numbers
					echo "ip route add $VPNSERVERIP via $IP dev $ADAPTER"
					echo "ip route del default"
					echo "ip route add default via $GW dev vpn_se"
					read
					dialog --title "VPN client is connected to $VPNSERVERIP" --colors --backtitle "$BACKTITLE" --help-button --help-label "Cancel" --yes-label "Stop" --no-label " Import " --yesno "\n\Z1Stop:  \Z0 stop\n\n\Z1Import:\Z0 import new config from /etc/armbian.vpn" 9 70
				fi
				response=$?
				if [[ $response = 0 ]]; then
					get_numbers
					echo "ip route del $VPNSERVERIP"
					echo "ip route del default"
					echo "ip route add default via $IP dev $ADAPTER"
					read
					dialog --backtitle "$BACKTITLE"  --nocancel --nook --infobox "\nClosing VPN connection" 5 27
					${VPNDIR}vpnclient stop >/dev/null 2>&1
				fi
	else
				dialog --title "VPN client is disconnected" --colors --backtitle "$BACKTITLE" --help-button --help-label "Cancel" --yes-label "Connect" --no-label " Import " --yesno "\n\Z1Connect:\Z0 Connect with your VPN server \n\n\Z1Import:\Z0 import new config from /etc/armbian.vpn" 9 70
				response=$?
				if [[ $response = 0 ]]; then
					${VPNDIR}vpnclient start >/dev/null 2>&1

					# raise devices
					raise_dev
					get_numbers
					echo "ip route add $VPNSERVERIP via $IP dev $ADAPTER"
					echo "ip route del default"
					echo "ip route add default via $GW dev vpn_se"
					read

				fi
				[[ $response = 1 ]] && vpn_reconfigure
	fi
	;;


	# Connect to Bluetooth
	#
	"BT discover" )
	dialog --backtitle "$BACKTITLE" --title " Bluetooth " --msgbox "\nMake sure your Bluetooth devices are discoverable!" 7 54
	connect_bt_interface
	;;


	# Edit network settings
	#
	"Advanced" )
		dialog --backtitle "$BACKTITLE" --title " Edit ifupdown network configuration /etc/network/interfaces" --no-collapse \
		--ok-label "Save" --editbox /etc/network/interfaces 30 0 2> /etc/network/interfaces.out
		[[ $? = 0 ]] && mv /etc/network/interfaces.out /etc/network/interfaces && reload-nety "reload"
	;;

	# Remove automatic wifi conections
	#
	"Forget" )
		LC_ALL=C nmcli --fields UUID,TIMESTAMP-REAL,TYPE con show | grep wireless |  awk '{print $1}' | while read line; \
		do nmcli con delete uuid  $line; done > /dev/null
	;;




	#-------------------------------------------------------------------------------------------------------------------------------------#
	#-------------------------------------------------------------------------------------------------------------------------------------#
	#-------------------------------------------------------------------------------------------------------------------------------------#




	# Change timezone
	#
	"Timezone" )
		dpkg-reconfigure tzdata
	;;


	# Change locales
	#
	"Locales" )
		dpkg-reconfigure locales
		source /etc/default/locale
		sed -i "s/^LANGUAGE=.*/LANGUAGE=$LANG/" /etc/default/locale
		export LANGUAGE=$LANG
	;;

	# Change keyboard
	#
	"Keyboard" )
		dpkg-reconfigure keyboard-configuration
	;;

	# Change Hostname
	#
	"Hostname" )
		hostname_current=$(cat /etc/hostname)
		hostname_new=$(\
		dialog --no-cancel --title " Change hostname " --backtitle "$BACKTITLE" --inputbox "\nType new hostname\n " 10 50 $hostname_current \
		3>&1 1>&2 2>&3 3>&- \
		)
		if [[ $? = 0 && -n $hostname_new ]]; then
			sed -i "s/$hostname_current/$hostname_new/g" /etc/hosts
			sed -i "s/$hostname_current/$hostname_new/g" /etc/hostname
			hostname $hostname_new
			systemctl restart systemd-logind.service
			dialog --title " Info " --backtitle "$BACKTITLE" --no-collapse --msgbox "\nYou need to logout to make the changes effective." 7 53
		fi
	;;

	# ZSH
	#
	"BASH" )
		# change shell for root
		chsh -s /bin/bash
		add_choose_user
		if [ -n "$CHOSEN_USER" ]; then
			chsh -s /bin/bash $CHOSEN_USER
		fi
		# cleanup
		rm -rf /etc/oh-my-zsh /etc/skel/.zshrc /etc/skel/.oh-my-zsh
		rm -rf /root/{.zshrc,.oh-my-zsh}
		# and for selected normal user
		add_choose_user
		if [ -n "$CHOSEN_USER" ]; then
			rm -rf /home/$CHOSEN_USER/{.zshrc,.oh-my-zsh}
		fi
		# change shell for future users
		sed -i "s/^SHELL=.*/SHELL=\/bin\/bash/" /etc/default/useradd
		# remove crontab
		crontab -l | grep -v oh-my  | crontab -
		dialog --backtitle "$BACKTITLE" --title "Info" --colors --msgbox "\nYour default shell was switched to: \Z1BASH\Z0\n\nPlease logout & login from this session!" 9 47
	;;


	# ZSH
	#
	"ZSH" )
		if ! is_package_manager_running; then
		if ! check_if_installed zsh ; then
			debconf-apt-progress -- apt-get update
			debconf-apt-progress -- apt-get install -y zsh tmux
		fi
		rm -rf /etc/oh-my-zsh
		git clone --quiet https://github.com/robbyrussell/oh-my-zsh.git /etc/oh-my-zsh
		cp /etc/oh-my-zsh/templates/zshrc.zsh-template /etc/skel/.zshrc
		mkdir -p /etc/skel/.oh-my-zsh/cache
		# change shell for future users
		sed -i "s/^SHELL=.*/SHELL=\/usr\/bin\/zsh/" /etc/default/useradd
		# we have common settings
		sed -i "s/^export ZSH=.*/export ZSH=\/etc\/oh-my-zsh/" /etc/skel/.zshrc
		# user cache
		sed -i "/^export ZSH=.*/a export ZSH_CACHE_DIR=~\/.oh-my-zsh\/cache" /etc/skel/.zshrc
		# define theme
		sed -i 's/^ZSH_THEME=.*/ZSH_THEME="risto"/' /etc/skel/.zshrc
		# remove default plugins
		sed -i '/^  git.*/ d' /etc/skel/.zshrc
		sed -i "/^plugins=.*/a git git-extras debian tmux screen history extract colorize web-search docker" /etc/skel/.zshrc
		# change shell for root
		chsh -s $(grep /zsh$ /etc/shells | tail -1)
		# copy cache directory
		cp -R --attributes-only /etc/skel/.oh-my-zsh /root/.oh-my-zsh
		cp /etc/skel/.zshrc /root/.zshrc
		# and for selected normal user
		add_choose_user
		if [ -n "$CHOSEN_USER" ]; then
			chsh -s $(grep /zsh$ /etc/shells | tail -1) $CHOSEN_USER
			# copy cache directory
			cp -R --attributes-only /etc/skel/.oh-my-zsh /home/$CHOSEN_USER/.oh-my-zsh
			cp /etc/skel/.zshrc /home/$CHOSEN_USER/.zshrc
			chown -R ${CHOSEN_USER}:${CHOSEN_USER} /home/${CHOSEN_USER}/{.zshrc,.oh-my-zsh}
		fi
		# add a cronjob to update oh-my-zsh once per month
		(crontab -l 2>/dev/null; echo "0 0 1 * * cd /etc/oh-my-zsh ; git -q pull origin master >/dev/null 2>/dev/null") | crontab -
		dialog --backtitle "$BACKTITLE" --title "Info" --colors --msgbox "\nYour default shell was switched to: \Z1ZSH\Z0\n\nPlease logout & login from this session!" 9 47
		fi
	;;


	# Firmware update
	#
	"Firmware" )
		if ! is_package_manager_running; then
			clear
			exec 3>&1
			monitor=$(dialog --print-maxsize 2>&1 1>&3)
			exec 3>&-
			mon_x=$(echo $monitor | awk '{print $2}' | sed 's/,//');mon_x=$(( $mon_x / 2 ))
			mon_y=$(echo $monitor | awk '{print $3}' | sed 's/,//');
			dialog --title " Update " --backtitle "$BACKTITLE" --no-label "Cancel" --yesno "\nDo you want to update board firmware?" 7 41
			if [[ $? = 0 ]]; then
				debconf-apt-progress -- apt-get update
				debconf-apt-progress -- apt-get -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" -y upgrade
				dialog --title " Firmware update " --colors --no-label "Cancel" --backtitle "$BACKTITLE" --yesno \
				"\nFirmware has been updated. Reboot?   " 7 39
				if [[ $? = 0 ]]; then reboot; fi
			fi
		fi
	;;


	# Install to SATA, eMMC, NAND or USB
	#
	"Install" )
		nand-sata-install
	;;


	# Freeze and unfreeze kernel and board support packages
	#
	"Freeze" | "Defreeze" )
	if ! is_package_manager_running; then
		dialog --title " Updating " --backtitle "$BACKTITLE" --yes-label "$1" --no-label "Cancel" --yesno \
		"\nDo you want to ${1,,} kernel updates?" 7 44
		if [[ $? = 0 ]]; then
		TARGET_BRANCH=$BRANCH
		exceptions "$BRANCH"
		PACKAGE_LIST="linux-image${TARGET_BRANCH}-${TARGET_FAMILY} linux-u-boot-${BOARD}-${UBOOT_BRANCH} linux-$(lsb_release -cs)-root$TARGET_BRANCH-$BOARD"
		if check_if_installed "linux-headers${TARGET_BRANCH}-${TARGET_FAMILY}"; then
                        PACKAGE_LIST=$PACKAGE_LIST" linux-headers${TARGET_BRANCH}-${TARGET_FAMILY}"
                fi
		[[ $BRANCH != "default" ]] && PACKAGE_LIST=$PACKAGE_LIST" linux-dtb$TARGET_BRANCH-$TARGET_FAMILY"

		local words=( $PACKAGE_LIST )
		local command="unhold"
		[[ $1 == "Freeze" ]] && local command="hold"
		for word in $PACKAGE_LIST; do apt-mark $command $word; done | dialog --backtitle "$BACKTITLE" --title "Packages ${1,,}" --progressbox $((${#words[@]}+2)) 64
		fi
	fi
	;;


	# Enable or disable desktop
	#
	"Desktop" )
		if [[ -n $DISPLAY_MANAGER ]]; then
			dialog --title " Desktop is enabled and running " --backtitle "$BACKTITLE" \
			--yes-label "Stop" --no-label "Cancel" --yesno "\nDo you want to stop and disable this service?" 7 50
			exitstatus=$?;
			if [[ $exitstatus = 0 ]]; then
				service nodm stop >/dev/null 2>&1 && sed -i "s/^NODM_ENABLED=.*/NODM_ENABLED=false/" /etc/default/nodm
				service lightdm stop >/dev/null 2>&1 && systemctl disable lightdm.service >/dev/null 2>&1
			fi
		else
			if ! is_package_manager_running; then
				if [[ -n $DESKTOP_INSTALLED ]]; then
					dialog --colors --title " Choose a display manager " --backtitle "$BACKTITLE" --help-button --help-label "Cancel" --yes-label "Lightdm" \
					--no-label "Nodm" --yesno "\n\Z1Lightdm\Z0 = full featured login display manager\n\Z1Nodm\Z0    = autoloading into desktop" 8 70
					exitstatus=$?;
					[[ $exitstatus = 0 ]] && [[ -f /etc/X11/default-display-manager ]] && \
					echo "/usr/sbin/lightdm" > /etc/X11/default-display-manager && \
					debconf-apt-progress -- apt-get -o Dpkg::Options::="--force-confold" -y --no-install-recommends install lightdm-gtk-greeter lightdm \
					&& systemctl start lightdm.service
					[[ $exitstatus = 1 ]] && [[ -f /etc/X11/default-display-manager ]] && \
					debconf-apt-progress -- apt-get -o Dpkg::Options::="--force-confold" -y --no-install-recommends install nodm \
					&& echo "/usr/sbin/nodm" > /etc/X11/default-display-manager && \
					sed -i "s/^NODM_ENABLED=.*/NODM_ENABLED=true/" /etc/default/nodm && service nodm start
				fi
			fi
		fi
	;;

	"Minimal" )
	configure_desktop
	;;

	"Default")
	configure_desktop "--install-recommends"
	;;


	"Nodm" )
		[[ -f /etc/X11/default-display-manager ]] && echo "/usr/sbin/nodm" > /etc/X11/default-display-manager
		systemctl disable lightdm.service >/dev/null 2>&1
		systemctl stop lightdm.service >/dev/null 2>&1
		sed -i "s/^NODM_ENABLED=.*/NODM_ENABLED=true/" /etc/default/nodm && service nodm start
		DISPLAY_MANAGER="nodm"
	;;


	"Lightdm" )
		if ! is_package_manager_running; then
			[[ -f /etc/X11/default-display-manager ]] && echo "/usr/sbin/lightdm" > /etc/X11/default-display-manager
			debconf-apt-progress -- apt-get -o Dpkg::Options::="--force-confold" -y --no-install-recommends install lightdm-gtk-greeter lightdm
			service nodm stop && sed -i "s/^NODM_ENABLED=.*/NODM_ENABLED=false/" /etc/default/nodm
			systemctl enable lightdm.service >/dev/null 2>&1
			systemctl start lightdm.service >/dev/null 2>&1
			DISPLAY_MANAGER="lightdm"
		fi
	;;


	"RDP" )
		if [[ -n $(service xrdp status | grep -w active) ]]; then
			systemctl stop xrdp.service >/dev/null 2>&1
			systemctl disable xrdp.service >/dev/null 2>&1
		else
			if ! is_package_manager_running; then
				debconf-apt-progress -- apt-get -y install xrdp vnc4server xorgxrdp
				systemctl enable xrdp.service >/dev/null 2>&1
				systemctl start xrdp.service >/dev/null 2>&1
				dialog --title "Info" --backtitle "$BACKTITLE" --nocancel --no-collapse --pause \
				"\nRemote graphical login to $BOARD_NAME using Microsoft Remote Desktop Protocol (RDP) is enabled." 11 57 3

			fi
		fi
	;;

	"Thunderbird" )
		if ! check_if_installed thunderbird then ; then
			debconf-apt-progress -- apt-get -y install thunderbird
		else
			debconf-apt-progress -- apt-get -y purge thunderbird
		fi
	;;

	"Libre" )
		debconf-apt-progress -- apt-get -y purge libreoffice*
	;;

	"Writer" )
		debconf-apt-progress -- apt-get -y install libreoffice-writer libreoffice-style-tango libreoffice-gtk
	;;

	"Suite" )
		debconf-apt-progress -- apt-get -y install libreoffice libreoffice-style-tango libreoffice-gtk
	;;


	# Stop low-level messages on console
	#
	"Lowlevel" )
		dialog --title " Kernel messages " --backtitle "$BACKTITLE" --help-button \
		--help-label "Yes & reboot" --yes-label "Yes" --no-label "Cancel" --yesno "\nStop low-level messages on console?" 7 64
		exitstatus=$?;
		[[ $exitstatus = 0 ]] && sed -i 's/^#kernel.printk\(.*\)/kernel.printk\1/' /etc/sysctl.conf
		[[ $exitstatus = 2 ]] && sed -i 's/^#kernel.printk\(.*\)/kernel.printk\1/' /etc/sysctl.conf && reboot
	;;


	# Edit boot environment
	#
	"Bootenv" )
		dialog --title " Edit u-boot environment " --ok-label "Save" \
		--no-collapse --editbox /boot/armbianEnv.txt 30 0 2> /boot/armbianEnv.txt.out
		[[ $? = 0 ]] && mv /boot/armbianEnv.txt.out /boot/armbianEnv.txt
	;;

	# Edit boot script
	#
	"Bootscript" )
		if [[ -f /boot/boot.ini ]]; then
		dialog --title " Edit boot.ini script " --ok-label "Save" \
		--no-collapse --editbox /boot/boot.ini 30 0 2> /boot/boot.ini.out
		[[ $? = 0 ]] && mv /boot/boot.ini.out /boot/boot.ini
		fi
	;;


	# Toggle overlay items
	#
	"Hardware" )
		# check if user agree to enter this area
		CHANGES="false"
		while true; do
			overlay_prefix=$(cat /boot/armbianEnv.txt | grep overlay_prefix | sed 's/overlay_prefix=//g')
			TARGET_BRANCH=$BRANCH
			exceptions "$BRANCH"
			MOTD=()
			LINES=()
			LIST_CONST=-3
			j=0
			DIALOG_CANCEL=1
			DIALOG_ESC=255
			while read line
			do
				STATUS=$([[ -n $(cat /boot/armbianEnv.txt | grep overlays | grep -w ${line}) ]] && echo "on")
				DESC=$(description "$line")
				MOTD+=( "$line" "$DESC" "$STATUS")
				LINES[ $j ]=$line
				(( j++ ))
			done < <(ls -1 ${OVERLAYDIR}/${overlay_prefix}*.dtbo | sed 's/^.*\('${overlay_prefix}'.*\)/\1/g' | sed 's/'${overlay_prefix}'-//g' | sed 's/.dtbo//g' )

			LISTLENGHT="$(($LIST_CONST+${#MOTD[@]}/2))"

			exec 3>&1
				selection=$(dialog --backtitle "$BACKTITLE" --colors --title "Toggle hardware configuration" --clear --cancel-label \
				"Exit" --ok-label "Save" --checklist "\nUse \Z1<space>\Z0 to toggle functions and save them. Exit when you are done.\n " \
				$LISTLENGHT 80 $LISTLENGHT "${MOTD[@]}" 2>&1 1>&3)
				exit_status=$?
			exec 3>&-

			case $exit_status in
					$DIALOG_ESC)
					break
				;;
				0)
					CHANGES="true"
					newoverlays="$(echo "$selection" | sed "s|[^ ]* *|&|g")"
					sed -i "s/^overlays=.*/overlays=$newoverlays/" /boot/armbianEnv.txt
					if ! grep -q "overlays" /boot/armbianEnv.txt; then echo "overlays=$newoverlays" >> /boot/armbianEnv.txt; fi
					if [[ -z $newoverlays ]]; then sed -i "/^overlays/d" /boot/armbianEnv.txt; fi
				;;
				1)
					if [[ "$CHANGES" == "true" ]]; then
					dialog --title " Applying changes " --backtitle "$BACKTITLE" --yes-label "Reboot" \
					--no-label "Cancel" --yesno "\nReboot to enable new features?" 7 34
					if [[ $? = 0 ]]; then reboot; else break; fi
					else
						break
					fi
				;;
				esac
			done

	;;

	# Change to other mirrors
	#
	"Mirror" )

		IFS=$'\r\n'
		GLOBIGNORE='*'
		LIST_CONST=3
		BEFORE="$(cat /etc/apt/sources.list.d/armbian.list | sed 's/http/\nhttp/g' | grep ^http | sed 's/\(^http[^ <]*\)\(.*\)/\1/g' | sed 's/https\?:\/\///')"
		PREFIX="$(echo $BEFORE | cut -f1 -d".")"
		AVAL_MIRROR=("${PREFIX}.armbian.com" "${PREFIX}.uk.armbian.com")
		local LIST=()
		for i in "${AVAL_MIRROR[@]}"
			do
			DESC=$(description "${i[0]}")
			[[ "${i[0]}" != "$BEFORE" ]] && LIST+=( "${i[0]//[[:blank:]]/}" "$DESC" )
		done
		LIST_LENGHT=$(($LIST_CONST+${#LIST[@]}/2));
		if [ "$LIST_LENGHT" -eq 1 ]; then
			TARGET_MIRROR=${AVAL_MIRROR[0]}
			dialog --backtitle "$BACKTITLE" --title "Please wait" --colors --msgbox "\nThere are no mirrors available!" 7 35
		else
			exec 3>&1
			TARGET_MIRROR=$(dialog --cancel-label "Cancel" --backtitle "$BACKTITLE" --no-collapse \
			--title "Change repository location" --colors --clear --menu "\nfrom \Z1$BEFORE\Z0 to:\n " $((6+${LIST_LENGHT})) 60 15 "${LIST[@]}" 2>&1 1>&3)
			exitstatus=$?;
			exec 3>&-
		fi

		if [[ $exitstatus == 0 ]]; then
			sed -i "s/$BEFORE/$TARGET_MIRROR/" /etc/apt/sources.list.d/armbian.list
			dialog --backtitle "$BACKTITLE" --title "Info" --colors --msgbox "\nArmbian package repository was switched to:\n\n\Z1$TARGET_MIRROR\Z0" 9 47
		fi
	;;

	# Toggle welcome screen items
	#
	"Welcome" )
		while true; do
		HOME="/etc/update-motd.d/"
		MOTD=()
		LINES=()
		LIST_CONST=6
		j=0
		DIALOG_CANCEL=1
		DIALOG_ESC=255

		while read line
		do
				STATUS=$([[ -x ${HOME}${line} ]] && echo "on")
			DESC=$(description "$line")
			MOTD+=( "$line" "$DESC" "$STATUS")
			LINES[ $j ]=$line
			(( j++ ))
		done < <(ls -1 $HOME)

				LISTLENGHT="$(($LIST_CONST+${#MOTD[@]}/2))"
				[[ $LISTLENGHT -lt 9 ]]; LISTLENGHT=9
				exec 3>&1
				selection=$(dialog --backtitle "$BACKTITLE" --title "Toggle motd executing scripts" --clear --cancel-label \
				"Exit" --ok-label "Save" --checklist "\nChoose what you want to enable or disable:\n " \
				$LISTLENGHT 70 15 "${MOTD[@]}" 2>&1 1>&3)
				exit_status=$?
				exec 3>&-
				case $exit_status in
				$DIALOG_CANCEL | $DIALOG_ESC)
						break
						;;
				0)
						chmod -x ${HOME}*
						chmod +x $(echo "$selection" | sed "s|[^ ]* *|${HOME}&|g")
				;;
				esac
		done
	;;


	# Toggle sshd options
	#
	"SSH" )
		while true; do

			DIALOG_CANCEL=2
			DIALOG_ESC=255
			LIST_CONST=7

			# variables cleanup
			PermitRootLogin="";
			PubkeyAuthentication="";
			PasswordAuthentication="";
			PhoneAuthentication=""
			MergeParameter="";
			Buttons="--no-cancel --ok-label "Save" --help-button --help-label Cancel"

			# read values
			[[ $(grep "^PermitRootLogin" /etc/ssh/sshd_config | awk '{print $2}') == "yes" ]] 			&& PermitRootLogin="on"
			[[ $(grep "^@include common-auth" /etc/pam.d/sshd | awk '{print $2}') == "common-auth" ]]  	&& PasswordAuthentication="on"
			[[ $(grep "^PubkeyAuthentication" /etc/ssh/sshd_config | awk '{print $2}') == "yes" ]]  	&& PubkeyAuthentication="on"
			[[ -n $(grep "pam_google_authenticator.so" /etc/pam.d/sshd) ]] 								&& PhoneAuthentication="on"

			# create menu
			MOTD=( "PermitRootLogin" "Allow root login" "$PermitRootLogin" )
			MOTD+=( "PasswordAuthentication" "Password login" "$PasswordAuthentication" )
			MOTD+=( "PubkeyAuthentication" "SSH key login" "$PubkeyAuthentication" )
			MOTD+=( "PhoneAuthentication" "Mobile phone one-time passcode" "$PhoneAuthentication" )
			LISTLENGHT="$(($LIST_CONST+${#MOTD[@]}/2))"

			Buttons="--no-cancel --ok-label "Save" --help-button --help-label Cancel"
			if [[ $PhoneAuthentication == "on" ]]; then
				Buttons="--cancel-label Generate-token --ok-label "Save" --help-button --help-label Cancel"
				if [[ -f ~/.google_authenticator ]]; then
					Buttons="--cancel-label New-token --ok-label "Save" --help-button --help-label Cancel --extra-button --extra-label Show-token"
				fi
			fi

			exec 3>&1
				selection=$(dialog $Buttons --backtitle "$BACKTITLE" --title " Toggle sshd options " --clear --checklist \
				"\nChoose what you want to enable or disable:\n " $LISTLENGHT 80 21 "${MOTD[@]}" 2>&1 1>&3)
				exit_status=$?
			exec 3>&-

			case $exit_status in
				$DIALOG_CANCEL | $DIALOG_ESC)
				break
				;;
				0)
					# read values, adjust config and restart service
					my_array=($selection)
					for((n=0;n<${#MOTD[@]};n++)); do
						if (( $(($n % 3 )) == 0 )); then

								# generic options if any
								if [[ " ${my_array[*]} " == *" ${MOTD[$n]} "* ]]; then
									sed -i "s/^#\?${MOTD[$n]}.*/${MOTD[$n]} yes/" /etc/ssh/sshd_config
									else
									sed -i "s/^#\?${MOTD[$n]}.*/${MOTD[$n]} no/" /etc/ssh/sshd_config
								fi

								if [[ $n -eq 0 ]]; then

									# phone
									if [[ " ${my_array[*]} " == *" PhoneAuthentication "* ]]; then
										if ! check_if_installed libpam-google-authenticator ; then
											debconf-apt-progress -- apt-get -y install libpam-google-authenticator
										fi
										if ! check_if_installed qrencode ; then
											debconf-apt-progress -- apt-get -y install qrencode
										fi
										MergeParameter="keyboard-interactive"
										sed -i "s/^#\?ChallengeResponseAuthentication.*/ChallengeResponseAuthentication yes/" /etc/ssh/sshd_config
										sed -i -n '/password updating/{p;:a;N;/@include common-password/!ba;s/.*\n/auth required pam_google_authenticator.so nullok\n/};p' /etc/pam.d/sshd
										else
										MergeParameter=""
										sed -i '/^auth required pam_google_authenticator.so nullok/ d' /etc/pam.d/sshd
										sed -i "s/^#\?ChallengeResponseAuthentication.*/ChallengeResponseAuthentication no/" /etc/ssh/sshd_config
									fi

									# password
									if [[ " ${my_array[*]} " == *" PasswordAuthentication "* ]]; then
											MergeParameter="password keyboard-interactive"
											sed -i "s/^#\?PasswordAuthentication.*/PasswordAuthentication yes/" /etc/ssh/sshd_config
											sed -i "s/^#\?ChallengeResponseAuthentication.*/ChallengeResponseAuthentication yes/" /etc/ssh/sshd_config
											sed -i "s/^\#@include common-auth/\@include common-auth/" /etc/pam.d/sshd
										else
											sed -i "s/^#\?PasswordAuthentication.*/PasswordAuthentication no/" /etc/ssh/sshd_config
											#sed -i "s/^#\?ChallengeResponseAuthentication.*/ChallengeResponseAuthentication no/" /etc/ssh/sshd_config
											sed -i "s/^\@include common-auth/\#@include common-auth/" /etc/pam.d/sshd
									fi

									# pubkey
									if [[ " ${my_array[*]} " == *" PubkeyAuthentication "* ]]; then
											MergeParameter="publickey keyboard-interactive "
											sed -i "s/^#\?PubkeyAuthentication.*/PubkeyAuthentication yes/" /etc/ssh/sshd_config
										else
											sed -i "s/^#\?PubkeyAuthentication.*/PubkeyAuthentication no/" /etc/ssh/sshd_config
									fi


									if [[ " ${my_array[*]} " == *" PubkeyAuthentication "* && " ${my_array[*]} " == *" PhoneAuthentication "* ]]; then
											MergeParameter="publickey,password publickey,keyboard-interactive"
											sed -i "s/^#\?PubkeyAuthentication.*/PubkeyAuthentication yes/" /etc/ssh/sshd_config
									fi


								fi
						fi
					done

					if [[ -z $MergeParameter ]]; then
							sed -i '/^AuthenticationMethods.*/ d' /etc/ssh/sshd_config
						else
							sed -i '/^AuthenticationMethods.*/ d' /etc/ssh/sshd_config
							sed -i -n '/and ChallengeResponseAuthentication to/{p;:a;N;/UsePAM yes/!ba;s/.*\n/AuthenticationMethods '"$MergeParameter"'\n/};p' /etc/ssh/sshd_config
					fi

					# reload sshd
					systemctl restart sshd.service
				;;
				3)
					display_qr_code
				;;
				1)
					google-authenticator -t -d -f -r 3 -R 30 -W -q
					display_qr_code
				;;
				esac
		done
	;;



	# Switch to daily builds
	#
	"Nightly" )
		if ! is_package_manager_running; then
			dialog --colors --title " \Z1Warning\Z0 " --backtitle "$BACKTITLE" --yes-label "OK" --no-label "Cancel" --yesno \
			"\nYou are switching to untested auto-build repository which might break your system.\n\nAre you fine with that?" 10 48

			if [[ $? = 0 ]]; then
				sed -i 's/apt.armbian.com/beta.armbian.com/' /etc/apt/sources.list.d/armbian.list
				debconf-apt-progress -- apt-get update
				debconf-apt-progress -- apt-get -y upgrade
				dialog --title "Switching to nightly" --backtitle "$BACKTITLE" --yes-label "Reboot" \
				--no-label "Cancel" --yesno "\nReboot to apply new settings?" 7 34
				if [[ $? = 0 ]]; then reboot; fi
			fi
		fi
	;;


	# Switch to stable builds and reinstall armbian packages
	#
	"Stable" )

		if ! is_package_manager_running; then
			dialog --colors --title " \Z1Warning\Z0 " --backtitle "$BACKTITLE" --yes-label "OK" \
			--no-label "Cancel" --yesno \
			"\nYou are switching back to stable respository where you are going to get future updates. Are you fine with that?" 9 44
			if [[ $? = 0 ]]; then
				sed -i 's/beta.armbian.com/apt.armbian.com/' /etc/apt/sources.list.d/armbian.list
				debconf-apt-progress -- apt-get update
				# remove nighlty packages and install stable
				TARGET_BRANCH=$BRANCH
				exceptions "$INSTALL_KERNEL"
				dialog --backtitle "$BACKTITLE" --title "Please wait" --infobox "\nRemoving current nightly kernel." 5 36
				apt-get -s -y -qq --no-install-recommends install linux-image${TARGET_BRANCH}-${TARGET_FAMILY} \
				linux-headers${TARGET_BRANCH}-${TARGET_FAMILY} linux-u-boot-${BOARD}-${UBOOT_BRANCH} \
				linux-$(lsb_release -cs)-root$TARGET_BRANCH-$BOARD > /dev/null 2>&1
				# if test download is ok, remove old kernel
				if [[ $? = 0 ]]; then
					aptitude remove ~nlinux-image --quiet=100 -y >> /var/log/upgrade.log 2>&1
					aptitude remove ~nlinux-dtb --quiet=100 -y >> /var/log/upgrade.log 2>&1
					aptitude remove ~nlinux-headers --quiet=100 -y >> /var/log/upgrade.log 2>&1
					aptitude remove ~nlinux-$(lsb_release -cs)-root --quiet=100 -y >> /var/log/upgrade.log 2>&1
				fi
				# install new packages
				INSTALL_DTB=""
				[[ -n $(apt-cache search --names-only "^linux-dtb$TARGET_BRANCH-$TARGET_FAMILY") ]] && \
				INSTALL_DTB="linux-dtb$TARGET_BRANCH-$TARGET_FAMILY"
				debconf-apt-progress -- apt-get --reinstall -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" \
				-y -qq --no-install-recommends install linux-image${TARGET_BRANCH}-${TARGET_FAMILY} \
				linux-headers${TARGET_BRANCH}-${TARGET_FAMILY} linux-u-boot-${BOARD}-${UBOOT_BRANCH} \
				linux-$(lsb_release -cs)-root$TARGET_BRANCH-$BOARD $INSTALL_DTB

				dialog --title "Switching to stable" --backtitle "$BACKTITLE" --yes-label "Reboot" --no-label "Cancel" --yesno \
				"\nReboot to apply new settings?" 7 34
				if [[ $? = 0 ]]; then reboot; fi
			fi
		fi

	;;

	# Switch to alternative configurations
	#
	"DTB" )
		if ! is_package_manager_running; then
			aval_dtbs
			if [[ $exitstatus = 0 ]]; then
			BOX_LENGHT=$((${#TARGET_BOARD}+28));
			dialog --title "Switching board config" --backtitle "$BACKTITLE" --yes-label "Reboot" --no-label "Cancel" --yesno "\nReboot to $TARGET_BOARD settings?" 7 $BOX_LENGHT
			if [[ $? = 0 ]]; then
				sed -i "s/^fdt_file=.*/fdt_file=$TARGET_BOARD/" /boot/armbianEnv.txt 2> /dev/null && grep -q "fdt_file=$TARGET_BOARD" /boot/armbianEnv.txt 2> /dev/null || echo "fdt_file=$TARGET_BOARD" >> /boot/armbianEnv.txt
				[[ "$LINUXFAMILY" = odroidxu4 ]] && sed -i "s/^fdt_file/board_name/" /boot/armbianEnv.txt && sed -i "s/^BOARD_NAME.*/BOARD_NAME=\"Odroid ${TARGET_BOARD^^}\"/" /etc/armbian-release
				reboot;
			fi
			fi
		fi
	;;

	# Switch to alternative kernels
	#
	"Switch" )
		if ! is_package_manager_running; then
			aval_kernel
			if [[ -n $TARGET_BRANCH ]]; then
				exceptions "$INSTALL_KERNEL"
				dialog --title " Install and reboot " --colors --backtitle "$BACKTITLE" --yes-label "OK" --no-label "Cancel" --yesno \
				"\nSwitching to \Z1linux-image${TARGET_BRANCH}-${TARGET_FAMILY}\Z0 \n\nWarning: another kernel might not provide\
				the same functionality or can be broken!\n\nBoard config will be reverted to defaults." 12 50
				if [[ $? = 0 ]]; then
					# remove old
					dialog --backtitle "$BACKTITLE" --title "Please wait" --infobox "\nRemoving current kernel." 5 28
					apt-get -s -y -qq --no-install-recommends install linux-image${TARGET_BRANCH}-${TARGET_FAMILY} \
					linux-headers${TARGET_BRANCH}-${TARGET_FAMILY} linux-u-boot-${BOARD}-${UBOOT_BRANCH} \
					linux-$(lsb_release -cs)-root$TARGET_BRANCH-$BOARD > /dev/null 2>&1
					# if test download is ok, remove old kernel
					if [[ $? = 0 ]]; then
						aptitude remove ~nlinux-image --quiet=100 -y >> /var/log/upgrade.log 2>&1
						aptitude remove ~nlinux-dtb --quiet=100 -y >> /var/log/upgrade.log 2>&1
						aptitude remove ~nlinux-headers --quiet=100 -y >> /var/log/upgrade.log 2>&1
					fi
					# install new packages
					INSTALL_DTB=""
					[[ -n $(apt-cache search --names-only "^linux-dtb$TARGET_BRANCH-$TARGET_FAMILY") ]] && \
					INSTALL_DTB="linux-dtb$TARGET_BRANCH-$TARGET_FAMILY"
					debconf-apt-progress -- apt-get --reinstall -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" -y -qq --no-install-recommends install linux-image${TARGET_BRANCH}-${TARGET_FAMILY} \
					linux-headers${TARGET_BRANCH}-${TARGET_FAMILY} linux-u-boot-${BOARD}-${UBOOT_BRANCH} \
					linux-$(lsb_release -cs)-root$TARGET_BRANCH-$BOARD $INSTALL_DTB

					# install new boot script
					[[ -f /usr/share/armbian/boot.cmd ]] && cp /usr/share/armbian/boot.cmd /boot/boot.cmd && mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr
					[[ -f /usr/share/armbian/boot.ini ]] && cp /usr/share/armbian/boot.ini /boot/boot.ini && sed -i "s/setenv rootdev.*/setenv rootdev \""$(sed -e 's/^.*root=//' -e 's/ .*$//' < /proc/cmdline)"\" /" /boot/boot.ini
					# create armbianEnv.txt
					[[ ! -f /boot/armbianEnv.txt ]] && printf "verbosity=1\nrootdev=$(sed -e 's/^.*root=//' -e 's/ .*$//' < /proc/cmdline)\n" > /boot/armbianEnv.txt

					dialog --title "Kernel switch" --backtitle "$BACKTITLE" --yes-label "Yes" --no-label "Cancel" \
					--yesno "\nNew kernel was installed. Reboot?" 7 64
					exitstatus=$?;
					[[ $exitstatus = 0 ]] &&  reboot
				fi
			fi
		fi
	;;


	# Toggle virtual read-only root filesystem
	#
	"Overlayroot" )
		if ! is_package_manager_running; then
			if [[ -n $(mount | grep -w overlay) ]]; then
				dialog --title " Root overlay " --backtitle "$BACKTITLE" --yes-label "Disable" \
				--no-label "Cancel" \
				--yesno "\nYour system is already virtual read-only.\n\nDo you want to disable this feature and reboot?" 9 60
				[[ $? = 0 ]] && overlayroot-chroot sed -i "s/^overlayroot=.*/overlayroot=\"\"/" /etc/overlayroot.conf && \
				overlayroot-chroot rm /etc/update-motd.d/97-overlayroot && reboot
			else
				debconf-apt-progress -- apt-get -o Dpkg::Options::="--force-confnew" -y --no-install-recommends install overlayroot
				echo '#!/bin/bash' > /etc/update-motd.d/97-overlayroot
				echo 'if [ -n "$(mount | grep -w tmpfs-root)" ]; then \
				echo -e "[\e[0m \e[1mremember: your system is in virtual read only mode\e[0m ]\n";fi' >> /etc/update-motd.d/97-overlayroot
				chmod +x /etc/update-motd.d/97-overlayroot
				dialog --title "Root overlay" --backtitle "$BACKTITLE" --yes-label "Reboot" \
				--no-label "Cancel" --yesno "\nEnable virtual read-only root and reboot." 7 45
				[[ $? = 0 ]] && sed -i "s/^overlayroot=.*/overlayroot=\"tmpfs\"/" /etc/overlayroot.conf && reboot
			fi
		fi
	;;


	esac
}