Hi Randa,
It looks like already an instance of Ryu-manager/Controller running. You
can check it by
ps -ea | grep ryu
if there is an instance running, it will show the PID, Then kill that and
you can run your Ryu controller.
see the screenshot for reference:
[image: Inline images 1]
Thanks
Gandhimathi
On 4 May 2016 at 09:35, Randa Alani <el...@leeds.ac.uk> wrote:
> Dear all
>
>
>
> I want to modify the window size of In_Packet and send it back to switch
> to flood this packet, I use this code :
>
>
>
>
> pkt.add_protocol(tcp.tcp(window_size = ws))
>
> pkt.serialize()
>
> self.logger.info("packet-out
> %s" % (pkt,))
>
> data = pkt.data
>
>
>
> out_tcp =
> ofproto.OFPP_FLOOD
>
> actions_tcp =
> [parser.OFPActionOutput(out_tcp)]
>
> out =
> parser.OFPPacketOut(datapath=datapath, buffer_id=ofproto.OFP_NO_BUFFER,
> in_port=ofproto.OFPP_CONTROLLER, actions=actions, data=data)
>
> datapath.send_msg(out)
>
>
>
>
>
> why is it not working?
>
> The error is :
>
>
>
> hub: uncaught exception: Traceback (most recent call last):
>
> File "/home/ubuntu/ryu/ryu/lib/hub.py", line 52, in _launch
>
> func(*args, **kwargs)
>
> File "/home/ubuntu/ryu/ryu/controller/controller.py", line 71, in
> __call__
>
> self.server_loop()
>
> File "/home/ubuntu/ryu/ryu/controller/controller.py", line 94, in
> server_loop
>
> datapath_connection_factory)
>
> File "/home/ubuntu/ryu/ryu/lib/hub.py", line 108, in __init__
>
> self.server = eventlet.listen(listen_info)
>
> File "/usr/lib/python2.7/dist-packages/eventlet/convenience.py", line
> 38, in listen
>
> sock.bind(addr)
>
> File "/usr/lib/python2.7/socket.py", line 224, in meth
>
> return getattr(self._sock,name)(*args)
>
> error: [Errno 98] Address already in use
>
>
>
> what sould I do? Please help.
>
>
>
> Regards,
>
>
>
> Randa
>
>
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