[jira] Closed: (FTPSERVER-302) Passive free port returned is not checked if it is really free or not

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

     [ https://issues.apache.org/jira/browse/FTPSERVER-302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Niklas Gustavsson closed FTPSERVER-302.
---------------------------------------

    Resolution: Fixed
      Assignee: Niklas Gustavsson

Fixed in rev 782447 and 782448. Thanks for reporting!

> Passive free port returned is not checked if it is really free or not
> ---------------------------------------------------------------------
>
>                 Key: FTPSERVER-302
>                 URL: https://issues.apache.org/jira/browse/FTPSERVER-302
>             Project: FtpServer
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.0.0
>            Reporter: Gusti Benawi
>            Assignee: Niklas Gustavsson
>             Fix For: 1.0.2, 1.1
>
>
> A passive port is requested by calling the method DataConnectionConfiguration.requestPassivePort()
> The search of a free port is done by PassivePorts.reserveNextPort()
> The "free" port returned is based on an internal boolean flag, which determines whether a port is free or not. 
> This is bad since the port returned could be actually being used by another application. The port will still be returned, and an exception will be thrown since it will fail to create the data socket.

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