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How can I check if an IP address is in a given subnet? I was able to do this by using Apache Commons SubnetUtils (SubnetUtils.SubnetInfo.isInRange) but it does not support IPv6 yet.
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We can use InetAddressValidator class that provides the following validation methods to validate an IPv4 or IPv6 address. isValid(inetAddress) : Returns true if the specified string is a valid IPv4 or IPv6 address. isValidInet4Address(inet4Address) : Returns true if the specified string is a valid IPv4 address.
Given a string S consisting of N characters, the task is to check if the given string S is IPv4 or IPv6 or Invalid. If the given string S is a valid IPv4, then print “IPv4”, if the string S is a valid IPv6, then print “IPv4”. Otherwise, print “-1”. A valid IPv4 address is an IP in the form “x1.
edazdarevic's CIDRUtils supports both IPv4 and IPv6. The example does not mention boolean isInRange(String ipAddress), but it is implemented!
Another option is java-ipv6, but it does not support IPv4 and requires JDK7.
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