Hi,
On 2016年02月24日 01:03, Osman Titu wrote:
> Hi
>
> For getting datapath object from datapath.id <http://datapath.id> (which is
> an integer) I have added this code bellow
>
> from ryu.app.ofctl.api import get_datapath
>
> dp = get_datapath(self, datapath.id <http://datapath.id>)
Getting the datapath object is successful in my environment.
My sample code and the execution result is as follows.
<sample code>
from ryu.app.ofctl.api import get_datapath
...
self.add_flow(datapath, 0, match, actions)
print "-----------------------------------------"
print "get_datapath(self, datapath.id) start"
dp = get_datapath(self, datapath.id)
print dp
print dp.id
print "get_datapath(self, datapath.id) end"
print "-----------------------------------------"
<execution result>
$ ryu-manager ./app/sample.py --verbose
loading app ./app/sample.py
require_app: ryu.app.ofctl.service is required by sample
loading app ryu.app.ofctl.service
loading app ryu.controller.ofp_handler
instantiating app ryu.app.ofctl.service of OfctlService
...snipped...
connected socket:<eventlet.greenio.GreenSocket object at 0x7f565cbd6d50>
address:('127.0.0.1', 35091)
hello ev <ryu.controller.ofp_event.EventOFPHello object at 0x7f565cbea150>
move onto config mode
EVENT ofp_event->SimpleSwitch13 EventOFPSwitchFeatures
EVENT ofp_event->ofctl_service EventOFPSwitchFeatures
switch features ev
version=0x4,msg_type=0x6,msg_len=0x20,xid=0xe126de9,OFPSwitchFeatures(auxiliary_id=0,capabilities=79,datapath_id=1,n_buffers=256,n_tables=254)
-----------------------------------------
get_datapath(self, datapath.id) start
EVENT SimpleSwitch13->ofctl_service GetDatapathRequest
add dpid 1 datapath <ryu.controller.controller.Datapath object at
0x7f565cbd6b10> new_info <ryu.app.ofctl.service._SwitchInfo object at
0x7f565cbea690> old_info None
dpid 1 -> datapath <ryu.controller.controller.Datapath object at 0x7f565cbd6b10>
<ryu.controller.controller.Datapath object at 0x7f565cbd6b10>
1
get_datapath(self, datapath.id) end
-----------------------------------------
>
> but I am getting this message "unknown error xid"
Maybe, one of the following was executed.
https://github.com/osrg/ryu/blob/master/ryu/app/ofctl/service.py#L185
or
https://github.com/osrg/ryu/blob/master/ryu/app/ofctl/service.py#L194
And, the code is described in the handler which is for receive the OFPErrorMsg.
https://github.com/osrg/ryu/blob/master/ryu/app/ofctl/service.py#L173
There is a possibility that you were receiving some kind of OpenFlow error
message.
FYI, it may becomes easier to find out the OFPErrorMsg for using --verbose
option as follows.
# ryu-manager [app_name] --verbose
<output example>
EventOFPErrorMsg received.
version=0x4, msg_type=0x1, msg_len=0x4c, xid=0x55572dbb
`-- msg_type: OFPT_ERROR(1)
OFPErrorMsg(type=0x6, code=0x1,
data=b'\x04\x0f\x00\x40\x55\x57\x2d\xbb\x00\x00\x00\x00\x00\x00\x00\x01\x00\x30\x00\x01\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x19\x00\x10\x80\x00\x16\x04\x0a\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x10\x00\x00\x00\x02\xff\xe5\x00\x00\x00\x00\x00\x00')
|-- type: OFPET_GROUP_MOD_FAILED(6)
|-- code: OFPGMFC_INVALID_GROUP(1)
`-- data: version=0x4, msg_type=0xf, msg_len=0x40, xid=0x55572dbb
`-- msg_type: OFPT_GROUP_MOD(15)
thanks,
>
> How can I fix it?
>
> BR
> Titu
>
>
>
>
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