Hi everyone, i am currently writing my bachelor thesis at TU Darmstadt in Germany. Part of my task is to transform Ryu into a Server/Client application where the server is connected to the switches and the client (running on another machine) runs the Ryu applications. For the network communication between the two parts I use the to_jsondict() and from_jsondict() functions before transmitting the events.
I now stumbled across the fact that after I use from_jsondict() some of
the fields in the object are empty. Here is a short piece of test code I
put into a packet handler function of an app:
> print("Before: {}".format(msg))
> foo = msg.to_jsondict()
> new_msg = ofproto_parser.ofp_msg_from_jsondict(datapath, foo)
> print("After: {}".format(new_msg))
The output is this:
Before:
version=0x4,msg_type=0xa,msg_len=0x54,xid=0x0,OFPPacketIn(buffer_id=4294967295,cookie=0,data=b'...',match=OFPMatch(oxm_fields={'in_port':
2}),reason=1,table_id=0,total_len=42)
After:
version=None,msg_type=None,msg_len=None,xid=None,OFPPacketIn(buffer_id=4294967295,cookie=0,data=b'...',match=OFPMatch(oxm_fields={'in_port':
2}),reason=1,table_id=0,total_len=42)
As you can see some fields like version, msg_type or msg_len are now
"None". Is there a reason for this behaviour?
Does anybody of you have an idea how to get around this problem? Some
Ryu apps need these fields.
Best regards,
Felix Breidenstein
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