[jira] [Created] (NET-521) SubnetUtils.SubnetInfo.getAddressCount() can overflow as it returns an int

["Sebb (JIRA)" <ji...@apache.org>]

Sebb created NET-521:
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             Summary: SubnetUtils.SubnetInfo.getAddressCount() can overflow as it returns an int
                 Key: NET-521
                 URL: https://issues.apache.org/jira/browse/NET-521
             Project: Commons Net
          Issue Type: Bug
    Affects Versions: 3.3
            Reporter: Sebb


The method SubnetUtils.SubnetInfo.getAddressCount() returns an int.

However a CIDR with 0 or 1 bits in the routing mask can represent more than Integer.MAX_VALUE entries, so the method cannot currently return the correct value.

Unfortunately, if the method were changed to return a long it would break binary compatibility (the return type is part of the API signature).

One possible solution is to provide a new method which returns a long, and deprecate the old method.

If the original method cannot return the correct value, it should probably throw a runtime error.



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