#!/bin/sh

usage="USAGE: TL902AC_tftp_recovery.sh <[start | stop]> <complete_path_to_recovery file>"

# OS/System specific variables
tftp_dir=/private/tftpboot/
ethport=en1

# Device specific variables
# TP-Link TL-WR902AC v1
# https://openwrt.org/toh/tp-link/tl-wr902ac_v1
ip_addr=192.168.1.1
subnet=255.255.255.0
tl_wr902ac_filename=openwrt-23.05.2-bcm53xx-generic-asus_rt-ac88u-squashfs.trx
tftp_file_path=$tftp_dir$tl_wr902ac_filename

# If we are starting the tftp Server
if [ $1 = start ]
then
	echo Starting recovery mode...
	# Check that 2nd argument (recovery image) has been specified (does not validate file)
	if [ -z $2 ]
	then
		echo $usage
	else
		echo "Copying file $2 to $tftp_file_path." 
		sudo cp $2 $tftp_file_path
		echo "Setting ethernet $ethport to $ip_addr $subnet." 
		# Set the ethernet interface to the expected tftp server address
		sudo ipconfig set $ethport manual $ip_addr $subnet
		echo "Starting tftp server."
		# Enable the tftp service
		sudo launchctl load -F /System/Library/LaunchDaemons/tftp.plist
	fi
# If we are stopping the tftp Server
elif [ $1 = stop ]
then
	echo Stopping... resuming normal mode
	# Disable the tftp service
	sudo launchctl unload -F /System/Library/LaunchDaemons/tftp.plist
	echo "Deleting file $tftp_file_path" 
	sudo rm $tftp_file_path
	echo "Setting ethernet $ethport to DHCP" 
	# Set the ethernet interface to back to DHCP for normal operation
	sudo ipconfig set $ethport dhcp
else
	echo $usage 
fi