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https://issues.apache.org/jira/browse/NET-262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12680524#action_12680524
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Sebb commented on NET-262:
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Also does not handle /0 properly - getAddressCount() returns a negative number,
as the number is higher than Integer.MAXINT.
/0 should perhaps be rejected as Illegal?
> SubnetUtils does not handle /31 and /32 CIDRs well
> --------------------------------------------------
>
> Key: NET-262
> URL: https://issues.apache.org/jira/browse/NET-262
> Project: Commons Net
> Issue Type: Bug
> Affects Versions: 2.0
> Reporter: Sebb
>
> SubnetUtils does not handle /31 and /32 CIDRs well.
> This should be documented and/or fixed.
> 192.168.0.1/32 causes an IllegalArgumentException to be thrown (by the way,
> that should show the upper and lower bounds)
> 192.168.0.3/31 gives
> addressCount=0,
> low =192.168.0.3
> high=192.168.0.2
> and 192.168.0.3 is rejected as not in range
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