ipv4-range
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ipv4-range
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	#!/bin/bash

	# snippet from https://stackoverflow.com/questions/10768160/ip-address-converter
	ip2dec () {
	local a b c d ip=$@
	IFS=. read -r a b c d <<< "$ip"
	printf '%d\n' "$((a * 256 ** 3 + b * 256 ** 2 + c * 256 + d))"
	}

	error_exit() {
	echo "Error: $1 is not a valid IPv4 address range"
	exit 1
	}

	# Only run this if there is a hypen present in $1
	if [[ "$1" =~ "-" ]]; then
	# This only works with real bash (<<<) - split IP addresses into array with
	# hyphen as delimiter
	readarray -d - -t strarr <<< $1

	ipaddrcheck --is-ipv4-single ${strarr[0]}
	if [ $? -gt 0 ]; then
	error_exit $1
	fi

	ipaddrcheck --is-ipv4-single ${strarr[1]}
	if [ $? -gt 0 ]; then
	error_exit $1
	fi

	start=$(ip2dec ${strarr[0]})
	stop=$(ip2dec ${strarr[1]})
	if [ $start -ge $stop ]; then
	error_exit $1
	fi

	exit 0
	fi

	error_exit $1