On Mon, Mar 18, 2013 at 09:59:46AM +0800, Can Zhang wrote:
> Hello,
Hello.
> I encounter the errors below quite often recently:
> ----
> Traceback (most recent call last):
> File "build/bdist.macosx-10.8-intel/egg/gevent/greenlet.py", line 390, in
> run
> result = self._run(*self.args, **self.kwargs)
> File "/Library/Python/2.7/site-packages/ryu-1.7-py2.7.egg/ryu/controller/
> controller.py", line 307, in datapath_connection_factory
> datapath.serve()
> File "/Library/Python/2.7/site-packages/ryu-1.7-py2.7.egg/ryu/controller/
> controller.py", line 227, in serve
> self._recv_loop()
> File "/Library/Python/2.7/site-packages/ryu-1.7-py2.7.egg/ryu/controller/
> controller.py", line 97, in deactivate
> method(self)
> File "/Library/Python/2.7/site-packages/ryu-1.7-py2.7.egg/ryu/controller/
> controller.py", line 170, in _recv_loop
> version, msg_type, msg_len, xid, buf)
> File "/Library/Python/2.7/site-packages/ryu-1.7-py2.7.egg/ryu/ofproto/
> ofproto_parser.py", line 50, in msg
> return msg_parser(datapath, version, msg_type, msg_len, xid, buf)
> File "/Library/Python/2.7/site-packages/ryu-1.7-py2.7.egg/ryu/ofproto/
> ofproto_v1_0_parser.py", line 52, in msg_parser
> return parser(datapath, version, msg_type, msg_len, xid, buf)
> File "/Library/Python/2.7/site-packages/ryu-1.7-py2.7.egg/ryu/ofproto/
> ofproto_v1_0_parser.py", line 1564, in parser
> msg.buf, ofproto_v1_0.OFP_HEADER_SIZE)
> error: unpack_from requires a buffer of at least 12 bytes
> <Greenlet at 0x10d9f1d70: datapath_connection_factory(<socket at 0x10dd80fd0
> fileno=8 sock=10.109.242.11, ('10.109.242.118', 50694))> failed with error
>
> ----
>
> For one of the triggers you may refer to http://sourceforge.net/mailarchive/
> forum.php?thread_name=
> 20130314.084438.1568838937885763874.fujita.tomonori%40lab.ntt.co.jp&forum_name=
> ryu-devel
>
> It seems that if an app I write fails to meet some unknown standard, the
> switch
> will send some packets that ryu cannot handle properly, and then ryu crashes.
> Maybe this is a bug of ryu?
You're right. Ryu should handle such OF packets more gracefully. Not crash.
(And log it with understandable message?)
Anyway, can you post (a part of) your app to reproduce it easily?
Or can you post the packet capture that caused the crash?
> FYI, I'm using ryu with mininet(open vSwitch 1.9.0)
If you'd like to use IPv6 support, OF v1.2+ needs to be enabled.
e.g.
ovs-vsctl set bridge s1 protocols=OpenFlow10,OpenFlow12,OpenFlow13
Since mininet is unaware of OF version, it should be done manually.
thanks,
>
>
> Best regards,
> Can Zhang
>
>
>
>
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