Hopefully Computes if Two IP Addresses are "In Range"

ipRange.sh

#! /bin/bash

IFS=. read LeftOctetA LeftOctetB LeftOctetC LeftOctetD <<EOF
192.168.4.5
EOF

IFS=. read RightOctetA RightOctetB RightOctetC RightOctetD <<EOF
192.168.4.8
EOF

IFS=. read NeedleOctetA NeedleOctetB NeedleOctetC NeedleOctetD <<EOF
192.168.4.7
EOF

LeftAsNumber=$(printf '%d\n' "$((LeftOctetA * 256 ** 3 + LeftOctetB * 256 ** 2 + LeftOctetC * 256 + LeftOctetD))")

RightAsNumber=$(printf '%d\n' "$((RightOctetA * 256 ** 3 + RightOctetB * 256 ** 2 + RightOctetC * 256 + RightOctetD))")

NeedleAsNumber=$(printf '%d\n' "$((NeedleOctetA * 256 ** 3 + NeedleOctetB * 256 ** 2 + NeedleOctetC * 256 + NeedleOctetD))")

if [[ NeedleAsNumber -lt RightAsNumber && NeedleAsNumber -gt LeftAsNumber ]]; then
    echo "In Range"
fi