[Ryu-devel] ryu action for outputing to input port

Discussion:

Mahdieh Shariat

2017-06-22 07:24:28 UTC

Tahere Yaghou:
Hi,
I want an ovs switch outputs a packet to its receiving port, but in ovs doc
I read:

actions=[action][,action...]
port
output:port
Outputs the packet to OpenFlow port number port. If
port is the packet's input port, the packet is not output.

so with bellow Ryu code:
Â» actions = [ofproto_parser.OFPActionOutput(output_port)]
when input_port== output_port, the packet is dropped.

I find a new action in ovs :
in_port
Outputs the packet on the port from which it
was
received.
but I can't find this action in Ryu... could you please help me to write a
code like this:
Â» if (in_port == port):
actions=[ofproto_parser.OFPActionInPort()]

I'm using ovs 2.7 and openflow 1.3

Thanks in advance

Mahdieh Shariat

2017-06-22 07:30:04 UTC

Permalink

Hi,
I want an ovs switch outputs a packet to its receiving port, but in ovs doc
I read:

actions=[action][,action...]
port
output:port
Outputs the packet to OpenFlow port number port. If
port is the packet's input port, the packet is not output.

so with bellow Ryu code:
Â» actions = [ofproto_parser.OFPActionOutput(output_port)]
when input_port== output_port, the packet is dropped.

I find a new action in ovs :
in_port
Outputs the packet on the port from which it
was
received.
but I can't find this action in Ryu... could you please help me to write a
code like this:
Â» if (in_port == port):
actions=[ofproto_parser.OFPActionInPort()]

I'm using ovs 2.7 and openflow 1.3

Thanks in advance

Fujimoto Satoshi

2017-06-22 07:55:44 UTC

Permalink

Hi, Mahdieh

You can use "ofproto.OFPP_IN_PORT" to do it.

actions = [parser.OFPActionOutput(ofproto.OFPP_IN_PORT)]
self.add_flow(datapath, 0, match, actions)

Then, the flow shown below will be installed.

$ovs-ofctl -O OpenFlow13 dump-flows s1
OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x0, duration=2.975s,
table=0, n_packets=13, n_bytes=1026, priority=0 actions=IN_PORT

Thanks,
Fujimoto

Post by Mahdieh Shariat
Hi,
I want an ovs switch outputs a packet to its receiving port, but in
actions=[action][,action...]
port
output:port
Outputs the packet to OpenFlow port number port.
If port is the packet's input port, the packet is not output.
Â» actions = [ofproto_parser.OFPActionOutput(output_port)]
when input_port== output_port, the packet is dropped.
in_port
Outputs the packet on the port from which
it was
received.
but I can't find this action in Ryu... could you please help me to
actions=[ofproto_parser.OFPActionInPort()]
I'm using ovs 2.7 and openflow 1.3
Thanks in advance
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Mahdieh Shariat

2017-06-23 18:16:15 UTC

Permalink

Hi, âFujimoto

Thank you very much for the prompt reply. It works.

But I have another problem in developing my app. In my app when I'm
installing rules on tables, I have a rule for two situations in a switch:
1. when a packet is incoming to in_port_1 and will go to out_port_2
2. when a packet is incoming to in_port_2 and will go to out_port_2

should I have two separate rules for these situations? May I have a common
action for them? Is there any ryu action for changing the input_port field
in ovs switch, like this:

Â» ovs-ofctl add-flow br0 in_port=2,actions=load:0->NXM_OF_IN_PORT[],2

Thanks

On Thu, Jun 22, 2017 at 12:25 PM, Fujimoto Satoshi <

Post by Fujimoto Satoshi
Hi, Mahdieh
You can use "ofproto.OFPP_IN_PORT" to do it.
actions = [parser.OFPActionOutput(ofproto.OFPP_IN_PORT)]
self.add_flow(datapath, 0, match, actions)
Then, the flow shown below will be installed.
$ovs-ofctl -O OpenFlow13 dump-flows s1
OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x0, duration=2.975s,
table=0, n_packets=13, n_bytes=1026, priority=0 actions=IN_PORT
Thanks,
Fujimoto
Hi,
I want an ovs switch outputs a packet to its receiving port, but in ovs
actions=[action][,action...]
port
output:port
Outputs the packet to OpenFlow port number port. If
port is the packet's input port, the packet is not output.
Â» actions = [ofproto_parser.OFPActionOutput(output_port)]
when input_port== output_port, the packet is dropped.
in_port
Outputs the packet on the port from which it
was
received.
but I can't find this action in Ryu... could you please help me to write a
actions=[ofproto_parser.OFPActionInPort()]
I'm using ovs 2.7 and openflow 1.3
Thanks in advance
------------------------------------------------------------------------------
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Iwase Yusuke

2017-06-26 00:34:31 UTC

Permalink

Hi Mahdieh,

Excuse me for jumping in.

Hi, Fujimoto
Thank you very much for the prompt reply. It works.
But I have another problem in developing my app. In my app when I'm installing rules on tables, I
1. when a packet is incoming to in_port_1 and will go to out_port_2
2. when a packet is incoming to in_port_2 and will go to out_port_2
should I have two separate rules for these situations? May I have a common action for them? Is there
» ovs-ofctl add-flow br0 in_port=2,actions=load:0->NXM_OF_IN_PORT[],2

How about using OFPActionSetField?
This action is almost equivalent to "load" action of OVS.

http://ryu.readthedocs.io/en/latest/ofproto_v1_3_ref.html#ryu.ofproto.ofproto_v1_3_parser.OFPActionSetField

If you want to use "load" action of OVS via Ryu, please refer to the following document.

http://ryu.readthedocs.io/en/latest/nicira_ext_ref.html#ryu.ofproto.ofproto_v1_3_parser.NXActionRegLoad

Thanks,
Iwase

Thanks
Hi, Mahdieh
You can use "ofproto.OFPP_IN_PORT" to do it.
actions = [parser.OFPActionOutput(ofproto.OFPP_IN_PORT)]
self.add_flow(datapath, 0, match, actions)
Then, the flow shown below will be installed.
$ovs-ofctl -O OpenFlow13 dump-flows s1
OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x0, duration=2.975s, table=0, n_packets=13,
n_bytes=1026, priority=0 actions=IN_PORT
Thanks,
Fujimoto

Post by Mahdieh Shariat
Hi,
actions=[action][,action...]
port
output:port
Outputs the packet to OpenFlow port number port. If port is the packet's
input port, the packet is not output.
» actions = [ofproto_parser.OFPActionOutput(output_port)]
when input_port== output_port, the packet is dropped.
in_port
Outputs the packet on the port from which it was
received.
actions=[ofproto_parser.OFPActionInPort()]
I'm using ovs 2.7 and openflow 1.3
Thanks in advance
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Mahdieh Shariat

2017-06-28 09:28:46 UTC

Permalink

Hi Iwase,
Thank you for your reply.

Post by Iwase Yusuke

Post by Mahdieh Shariat
actions = [

parser.NXActionRegLoad(ofs_nbits=nicira_ext.ofs_nbits(4, 31),
dst="NXM_OF_IN_PORT[]", value=0x0),
parser.OFPActionOutput(_port)]

Post by Iwase Yusuke

Post by Mahdieh Shariat
File

"/home/mahdie/.local/lib/python2.7/site-packages/ryu/ofproto/oxx_fields.py",
line 58, in _from_user_header
(num, t) = _get_field_info_by_name(oxx, name_to_field, name)
File
"/home/mahdie/.local/lib/python2.7/site-packages/ryu/ofproto/oxx_fields.py",
line 53, in _get_field_info_by_name
raise KeyError('unknown %s field: %s' % (oxx.upper(), name))
KeyError: 'unknown OXM field: NXM_OF_IN_PORT[]'
â
try:
f = name_to_field[name]
t = f.type
num = f.num
except KeyError:
t = type_desc.UnknownType
if name.startswith('field_'):
num = int(name.split('_')[1])
else:
raise KeyError('unknown %s field: %s' % (oxx.upper(), name))
return num, t

Unfortunately I can't find the related field name of "NXM_OF_IN_PORT[]" in
Ryu. How can I find that?
Thanks for your assistance

Post by Iwase Yusuke
Hi Mahdieh,
Excuse me for jumping in.

Post by Mahdieh Shariat
Hi, âFujimoto
Thank you very much for the prompt reply. It works.
But I have another problem in developing my app. In my app when I'm
1. when a packet is incoming to in_port_1 and will go to out_port_2
2. when a packet is incoming to in_port_2 and will go to out_port_2
should I have two separate rules for these situations? May I have a
common action for them? Is there any ryu action for changing the input_port
Â» ovs-ofctl add-flow br0 in_port=2,actions=load:0->NXM_OF_IN_PORT[],2

How about using OFPActionSetField?
This action is almost equivalent to "load" action of OVS.
http://ryu.readthedocs.io/en/latest/ofproto_v1_3_ref.html#ry
u.ofproto.ofproto_v1_3_parser.OFPActionSetField
If you want to use "load" action of OVS via Ryu, please refer to the following document.
http://ryu.readthedocs.io/en/latest/nicira_ext_ref.html#ryu.
ofproto.ofproto_v1_3_parser.NXActionRegLoad
Thanks,
Iwase

Post by Mahdieh Shariat
Thanks
On Thu, Jun 22, 2017 at 12:25 PM, Fujimoto Satoshi <
Hi, Mahdieh
You can use "ofproto.OFPP_IN_PORT" to do it.
actions = [parser.OFPActionOutput(ofproto.OFPP_IN_PORT)]
self.add_flow(datapath, 0, match, actions)
Then, the flow shown below will be installed.
$ovs-ofctl -O OpenFlow13 dump-flows s1
OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x0, duration=2.975s,
table=0, n_packets=13,
n_bytes=1026, priority=0 actions=IN_PORT
Thanks,
Fujimoto

Post by Mahdieh Shariat
Hi,
actions=[action][,action...]
port
output:port
Outputs the packet to OpenFlow port number
port. If port is the packet's
input port, the packet is not output.
Â» actions = [ofproto_parser.OFPActionOutput(output_port)]
when input_port== output_port, the packet is dropped.
in_port
Outputs the packet on the port from which it was
received.
but I can't find this action in Ryu... could you please help me to
actions=[ofproto_parser.OFPActionInPort()]
I'm using ovs 2.7 and openflow 1.3
Thanks in advance
------------------------------------------------------------
------------------
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<https://lists.sourceforge.net/lists/listinfo/ryu-devel>

------------------------------------------------------------
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Iwase Yusuke

2017-06-29 05:25:10 UTC

Permalink

Hi Mahdieh,

NXM fields in Ryu are defined as the following.
http://ryu.readthedocs.io/en/latest/nicira_ext_ref.html#module-ryu.ofproto.nicira_ext

For "NXM_OF_IN_PORT", you can use "in_port_nxm", I guess.

Thanks,
Iwase

Post by Mahdieh Shariat
Hi Iwase,
Thank you for your reply.

Post by Mahdieh Shariat
actions = [

parser.NXActionRegLoad(ofs_nbits=nicira_ext.ofs_nbits(4, 31), dst="NXM_OF_IN_PORT[]", value=0x0),
parser.OFPActionOutput(_port)]

Post by Mahdieh Shariat
File "/home/mahdie/.local/lib/python2.7/site-packages/ryu/ofproto/oxx_fields.py", line 58, in

_from_user_header
(num, t) = _get_field_info_by_name(oxx, name_to_field, name)
File "/home/mahdie/.local/lib/python2.7/site-packages/ryu/ofproto/oxx_fields.py", line 53, in
_get_field_info_by_name
raise KeyError('unknown %s field: %s' % (oxx.upper(), name))
KeyError: 'unknown OXM field: NXM_OF_IN_PORT[]'

f = name_to_field[name]
t = f.type
num = f.num
t = type_desc.UnknownType
num = int(name.split('_')[1])
raise KeyError('unknown %s field: %s' % (oxx.upper(), name))
return num, t
Unfortunately I can't find the related field name of "NXM_OF_IN_PORT[]" in Ryu. How can I find that?
Thanks for your assistance
Hi Mahdieh,
Excuse me for jumping in.
Hi, Fujimoto
Thank you very much for the prompt reply. It works.
But I have another problem in developing my app. In my app when I'm installing rules on
1. when a packet is incoming to in_port_1 and will go to out_port_2
2. when a packet is incoming to in_port_2 and will go to out_port_2
should I have two separate rules for these situations? May I have a common action for them?
» ovs-ofctl add-flow br0 in_port=2,actions=load:0->NXM_OF_IN_PORT[],2
How about using OFPActionSetField?
This action is almost equivalent to "load" action of OVS.
http://ryu.readthedocs.io/en/latest/ofproto_v1_3_ref.html#ryu.ofproto.ofproto_v1_3_parser.OFPActionSetField
<http://ryu.readthedocs.io/en/latest/ofproto_v1_3_ref.html#ryu.ofproto.ofproto_v1_3_parser.OFPActionSetField>
If you want to use "load" action of OVS via Ryu, please refer to the following document.
http://ryu.readthedocs.io/en/latest/nicira_ext_ref.html#ryu.ofproto.ofproto_v1_3_parser.NXActionRegLoad
<http://ryu.readthedocs.io/en/latest/nicira_ext_ref.html#ryu.ofproto.ofproto_v1_3_parser.NXActionRegLoad>
Thanks,
Iwase
Thanks
Hi, Mahdieh
You can use "ofproto.OFPP_IN_PORT" to do it.
actions = [parser.OFPActionOutput(ofproto.OFPP_IN_PORT)]
self.add_flow(datapath, 0, match, actions)
Then, the flow shown below will be installed.
$ovs-ofctl -O OpenFlow13 dump-flows s1
OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x0, duration=2.975s, table=0,
n_packets=13,
n_bytes=1026, priority=0 actions=IN_PORT
Thanks,
Fujimoto
Hi,
actions=[action][,action...]
port
output:port
Outputs the packet to OpenFlow port number port. If port is
the packet's
input port, the packet is not output.
» actions = [ofproto_parser.OFPActionOutput(output_port)]
when input_port== output_port, the packet is dropped.
in_port
Outputs the packet on the port from which it was
received.
but I can't find this action in Ryu... could you please help me to write a code
actions=[ofproto_parser.OFPActionInPort()]
I'm using ovs 2.7 and openflow 1.3
Thanks in advance
------------------------------------------------------------------------------
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<https://lists.sourceforge.net/lists/listinfo/ryu-devel>
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<https://lists.sourceforge.net/lists/listinfo/ryu-devel>>
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