controller/network: fix key error

This patch fixes key error exception.
The switch may connect to the controller before network creation API call.

> Traceback (most recent call last):
>   File "/usr/lib/pymodules/python2.7/gevent/greenlet.py", line 390, in run
>     result = self._run(*self.args, **self.kwargs)
>   File "/ryubin/ryu/controller/controller.py", line 237, in datapath_connection_factory
>     datapath.serve()
>   File "/ryubin/ryu/controller/controller.py", line 184, in serve
>     self._recv_loop()
>   File "/ryubin/ryu/controller/controller.py", line 63, in deactivate
>     method(self)
>   File "/ryubin/ryu/controller/controller.py", line 136, in _recv_loop
>     self.ev_q.queue(ofp_event.ofp_msg_to_ev(msg))
>   File "/ryubin/ryu/controller/dispatcher.py", line 106, in queue
>     self._dispatcher(ev)
>   File "/ryubin/ryu/controller/dispatcher.py", line 170, in __call__
>     self.dispatch(ev)
>   File "/ryubin/ryu/controller/dispatcher.py", line 187, in dispatch
>     handled = self._dispatch(ev, self.events.get(ev.__class__, []))
>   File "/ryubin/ryu/controller/dispatcher.py", line 178, in _dispatch
>     ret = h(ev)
>   File "/ryubin/ryu/app/simple_isolation.py", line 45, in switch_features_handler
>     self.nw.add_datapath(ev.msg)
>   File "/ryubin/ryu/controller/network.py", line 137, in add_datapath
>     self.port_added(datapath, port_no)
>   File "/ryubin/ryu/controller/network.py", line 144, in port_added
>     dp = self.dpids[datapath.id]
> KeyError: None

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

0 files changed, 0 insertions, 0 deletions