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Editorial Team
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Asked: 2026-05-23T20:31:52+00:00

I am working with another team who is working in C. The protocol which

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I am working with another team who is working in C. The protocol which we communicate with sends an IP address in byte[] format, as well as 2 “mask” values which are byte[8]. I would like to use the IP address as a BigInteger so that I can do comparisons to see if an IP address is between 2 other IP addresses. To ensure that signedness doesn’t screw me up, I need a way to convert the IP from a byte[] (either 4 byte for IPv4 or 16 byte for IPv6) into a positive value in a BigInteger. Could someone point me to a reference or suggest a method of accomplishing this?

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  1. Editorial Team

    Just use the constructor which accepts a byte array and a parameter to say whether it’s positive or negative.

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