#!/bin/bash

# Copyright (C) 2014 Multi-Tech Systems

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

do_start() {
	echo "starting dhcp daemon"
	udhcpd -S /etc/udhcpd.conf
}

do_stop() {
	echo "stopping dhcp daemon"
	killall udhcpd
}

usage() {
	echo "Usage: $(basename $0) start|stop|restart"
	exit 1
}

# main
if [[ $# != 1 ]]; then
	usage
fi

case $1 in
	start)
		if [[ ! -f "/etc/udhcpd.conf" ]]
		then
			echo "/etc/udhcpd.conf does not exist"
			exit 1
		fi
		do_start
		;;
	stop)
		do_stop
		;;
	restart)
		do_stop
		sleep 1
		do_start
		;;
	*)
		usage
		;;
esac

exit 0