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https://issues.apache.org/jira/browse/NET-260?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andris Rauda updated NET-260:
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Fix Version/s: (was: 1.1.1)
> SubnetUtils.SubnetInfo.isInRange(...) returns incorrect values
> --------------------------------------------------------------
>
> Key: NET-260
> URL: https://issues.apache.org/jira/browse/NET-260
> Project: Commons Net
> Issue Type: Bug
> Affects Versions: 2.0
> Reporter: Andris Rauda
>
> SubnetUtils class handles IP addresses as int (which in Java is signed).
> isInRange() method does not take this into account:
> {code}
> private boolean isInRange(int address) {
> return ((address-low()) <= (high()-low()));
> }
> {code}
> In following code snippet isInRange() returns true, when clearly 120.0.0.0 is
> outside the range: 192.168.12.0 - 192.168.13.255
> (see
> http://compnetworking.about.com/od/workingwithipaddresses/a/cidr_notation.htm)
> {code}
> String cidrNotation = "192.168.12.0/23";
> SubnetUtils.SubnetInfo info = new SubnetUtils(cidrNotation).getInfo();
> assertFalse(info.isInRange("120.0.0.0")); // fails
> {code}
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