[pox-dev] Unable to set a match based on nw_src or nw_dst through POX web service

[陳耀庭]

Hello All,

I am trying to use POX web service to set a flow rule that matches based on the 
nw_src and nw_dst fields of the match object.
I am using an OpenFlow Switch and a POX controller.
I use the following command to execute POX in Ubuntu.
./pox.py  --verbose web.webcore --address='192.168.1.1' --port=5566 
openflow.webservice

I use curl to set the flow rule

curl -i -X POST –d 
'{"method":"set_table","params":{"dpid":"00-00-00-00-00-01","flows":[{"actions":[{"type":"OFPAT_OUTPUT",
 "port":1}],"match":{"dl_type":"0x0800","nw_src":"192.168.1.2"}}]}}' 
http://192.168.1.11:5566/OF/

Then I get the following error message:

ERROR:recoco:Exception calling <bound method OFSetTableRequest._do_init of 
<pox.openflow.webservice.OFSetTableRequest object at 0xa207c4c>>
Traceback (most recent call last):
  File "/home/routeflow/pox/pox/lib/recoco/recoco.py", line 774, in run
    e[0](*e[1], **e[2])
  File "/home/routeflow/pox/pox/openflow/webservice.py", line 73, in _do_init
    self._init(*args, **kw)
  File "/home/routeflow/pox/pox/openflow/webservice.py", line 164, in _init
    self._con.send(fm)
  File "/home/routeflow/pox/pox/openflow/of_01.py", line 692, in send
    data = data.pack()
  File "/home/routeflow/pox/pox/openflow/libopenflow_01.py", line 2316, in pack
    packed += self.match.pack(flow_mod=True)
  File "/home/routeflow/pox/pox/openflow/libopenflow_01.py", line 1205, in pack
    packed += struct.pack("!LLHH", check_ip_or_arp(fix(self.nw_src)),
  File "/home/routeflow/pox/pox/openflow/libopenflow_01.py", line 1203, in fix
    return addr.toUnsigned()
AttributeError: 'tuple' object has no attribute 'toUnsigned'
ERROR:web.jsonrpc:While handling set_table...
Traceback (most recent call last):
  File "/home/routeflow/pox/pox/web/jsonrpc.py", line 161, in _handle
    r = method(*params,**kw)
  File "/home/routeflow/pox/pox/openflow/webservice.py", line 191, in 
_exec_set_table
    return OFSetTableRequest(con, flows).get_response()
  File "/home/routeflow/pox/pox/openflow/webservice.py", line 84, in 
get_response
    raise RuntimeError("Operation timed out")
RuntimeError: Operation timed out
DEBUG:web.webcore.server:/OF/:"POST /OF/ HTTP/1.1" 200 -


How should I set a flow rule using the nw_src or nw_dst field?

Thanks.

Timothy