How to convert byte [] to positive BigInteger in Java?

I'm working with another team working in C The protocol we communicate with sends the IP address in byte [] format and two "Mask" values, namely byte [8] I want to use the IP address as BigInteger so that I can compare to see if the IP address is between 2 other IP addresses To ensure that the signature doesn't screw me up, I need a way to convert IP from byte [] (4 bytes for IPv4 or 16 bytes for IPv6) to a positive value in BigInteger Can someone guide me to refer to or suggest a way to complete this?

Solution

Simply use a constructor that accepts byte arrays and parameters to indicate whether it is positive or negative