Revision b453e006 mininet/node.py

View differences:

mininet/node.py
995 995 

  		




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    def checkListening( self ):


  		




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        "Make sure no controllers are running on our port"


  		




  
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        # Verify that Telnet is installed first:


  		




  
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        out, err, returnCode = errRun( "which telnet" )


  		




  
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        if 'telnet' not in out or returnCode != 0:


  		




  
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            raise Exception( "Error running telnet to check for listening "


  		




  
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                             "controllers; please check that it is "


  		




  
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                             "installed." )


  		




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        listening = self.cmd( "echo A | telnet -e A %s %d" %


  		




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                              ( self.ip, self.port ) )


  		




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        if 'Unable' not in listening:


  		












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