Re: [Ryu-devel] Initiate event from within a ryu app

[mraabs]

When the controller and the switches perform handshake, i.e. config-dispatch event you can store the datapath object of switches  in a dictionary then use these object to initiate a packet out   Something like this: https://github.com/osrg/ryu/blob/master/ryu/app/simple_monitor_13.py If you search on the net you will be able to find some better examples. Regards, M. Reza From: mirakyanmar...@gmail.com Sent: July 27, 2019 9:46 AM To: ryu-devel@lists.sourceforge.net Subject: [Ryu-devel] Initiate event from within a ryu app Dear Ryu developers, I'm trying to initiate the sending of a packet from within a Ryu app but not sure how to do it right. The main problem is that I'm not sure how to create a new Datapath/OFPPacketIn event object so that I can send an event. Right now I have the following code snippet: from ryu.baseimport app_manager from ryu.controllerimport ofp_event from ryu.lib.packetimport ethernet, ipv4, icmp from ryu.ofprotoimport ofproto_v1_3 class RyuEventSender(app_manager.RyuApp): OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION] def send_packet(self):         pkt = ethernet.ethernet(dst='5e:cc:cc:b1:49:4b') / \ ipv4.ipv4(src='192.168.70.2', dst='192.168.70.3', proto=1) / \               icmp.icmp()         pkt.serialize() ev = ... # Create an ofp_event.EventOFPPacketIn event self.send_event_to_observers(ev) print('[SENDER]:', ev.msg) def start(self): super().start() self.send_packet() Can you point me to how to create a Datapath object or a valid OFPPacketIn event or any other way of sending a packet from within Ryu? Thanks in advance. Best, Martin

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