Hi,
datapath.send_msg() seems to compose OpenFlow message per single TCP packet.
https://github.com/osrg/ryu/blob/5bde6ae440c6aa67dafe02b5ad1cd2d933ee4350/ryu/controller/controller.py#L404-L410
If you want to compose multiple OpenFlow messages into a single TCP packet, you need
to use "low
level" API datapath.send() instead of datapath.send_msg().
For example;
out1 = parser.OFPPacketOut(...) # if you have two PacketOut messages
out2 = parser.OFPPacketOut(...)
buf = b''
for out in [out1, out2]:
# handle xid and serialization manually
if out.xid is None:
datapath.set_xid(out)
out.serialize()
buf += out.buf # combine messages into single binary
datapath.send(buf)
Thanks,
Iwase
On 2017年11月02日 14:03, nitish nagesh wrote:
Hi,
I am trying to write a script which could generate a packet with multiple PACKET_OUT messages
bundled within it. For example something like this:
Inline image 1
I have this sample script which successfully generates a single PKT OUT message.
/@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
def _packet_in_handler(self, ev):
msg = ev.msg
datapath = msg.datapath
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
in_port = msg.match['in_port']
if (in_port == 3):
out_port = 2
in_port = ofproto.OFPP_CONTROLLER
else:
out_port = 3
actions = [parser.OFPActionOutput(out_port)]
data = msg.data
out = parser.OFPPacketOut(datapath=datapath, buffer_id=msg.buffer_id,
in_port=in_port, actions=actions, data=data)
datapath.send_msg(out)
/
If i change the "actons" & call datapath.send() again, it ends up generating 2 PKT OUT messages
in different packets. How do i change the code so that it bundles them together into one packet. Can
you please help me out?
Thanks in advance
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