Hi Iwase, thanks for your response,
Im using OpenFlow 1.5. I tried to create an ethernet packet as you
mentioned but no packet is sent by the switch. I dont really know what im
doing wrong. I just want to send a packet from datapath_id ==
233669375027733 to datapath_id == 8995258462434. Here's the code with the
ethernet frame and header:
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def switch_features_handler(self, ev):
msg = ev.msg
datapath = msg.datapath
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
match_miss = parser.OFPMatch()
actions_miss = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
ofproto.OFPCML_NO_BUFFER)]
self.add_flow(datapath, 0, match_miss, actions_miss)
actions_out = [parser.OFPActionOutput(1)]
#self.add_flow(datapath, 1, match_2, actions_out)
if msg.datapath_id == 233669375027733:
match_cpd = parser.OFPMatch(in_port=1,
eth_dst='08:2e:5f:2f:70:e2', eth_src='d4:85:64:17:ea:15',)
self.add_flow(datapath, 1, match_cpd, actions_out)
elif msg.datapath_id == 8995258462434:
match_srem = parser.OFPMatch(in_port=1,
eth_dst='d4:85:64:17:ea:15', eth_src='08:2e:5f:2f:70:e2')
actions_srem = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
ofproto.OFPCML_NO_BUFFER)]
self.add_flow(datapath, 1, match_srem, actions_srem)
#I just send the packet from datapath_id == 233669375027733
if msg.datapath_id == 233669375027733:
p = packet.Packet()
eth = ethernet.ethernet(dst='08:2e:5f:2f:70:e2',
src='d4:85:64:17:ea:15', ethertype=0x0800)
p.add_protocol(eth)
p.serialize()
match_out = parser.OFPMatch(in_port=1)
out = parser.OFPPacketOut(datapath=msg.datapath,
buffer_id=ofproto.OFP_NO_BUFFER,
match=match_out, actions=actions_out,
data=p.data)
datapath.send_msg(out)
Thanks in advance.
2018-03-23 0:29 GMT+01:00 Iwase Yusuke <iwase.yusu...@gmail.com>:
> Hi Alvaro,
>
> According to the OpenFlow Spec 1.3, the data field of OFPPacketOut must be
> an
> Ethernet frame and I think you need to add also Ethernet header using
> "ethernet.ethernet" class.
> http://osrg.github.io/ryu-book/en/html/packet_lib.html#gener
> ation-of-packets-serialization
>
> > p = packet.Packet()
> > ip = ipv4.ipv4(src='172.16.10.10', dst='172.16.10.20')
> > p.add_protocol(ip)
> > p.serialize()
>
> From your code, you seems to add only IPv4 header and no Ethernet header.
>
> Thanks,
> Iwase
>
>
>
> On 2018年03月23日 01:22, Alvaro Jimenez Moreno wrote:
>
>>
>> Hi, Im having some issues to send a packet out message between 2 ovs. Im
>> have 3 PCs. 2 of them act like an ovs and the third one has the Ryu
>> controller. Im have a vlan (vid=44) por signal traffic between both ovs and
>> the controller and a vlan (vid=10) just for transport between both ovs. I
>> also have the 3 PCs physically connected by a Cisco Catalyst 2960 switch.
>> Im figuring out how to send a packet out from one ovs (172.16.10.10) to the
>> other ovs (172.16.10.20) without receiving a packet in message first. Now
>> im sending the packet out in the switch features handler as follows:
>>
>> Switch features handler:
>>
>> @set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
>> def switch_features_handler(self, ev):
>> msg = ev.msg
>> datapath = msg.datapath
>> ofproto = datapath.ofproto
>> parser = datapath.ofproto_parser
>>
>> match_miss = parser.OFPMatch()
>> actions_miss = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
>> ofproto.OFPCML_NO_BUFFER)]
>>
>> self.add_flow(datapath, 0, match_miss, actions_miss)
>> match_2 = parser.OFPMatch(in_port=1, eth_type=0x800,
>> ipv4_dst='172.16.10.20')
>>
>> actions_out = [parser.OFPActionOutput(port=1)]
>> self.add_flow(datapath, 1, match_2, actions_out)
>>
>> #I send the packet out just from one ovs:
>> if msg.datapath_id == 233669375027733:
>> p = packet.Packet()
>> ip = ipv4.ipv4(src='172.16.10.10', dst='172.16.10.20')
>> p.add_protocol(ip)
>> p.serialize()
>> match_out = parser.OFPMatch(in_port=1)
>> out = parser.OFPPacketOut(datapath=msg.datapath,
>> buffer_id=ofproto.OFP_NO_BUFFER,
>> match=match_out, actions=actions_out, data=p.data)
>> datapath.send_msg(out)
>>
>> def add_flow(self, datapath, priority, match, actions):
>> ofproto = datapath.ofproto
>> parser = datapath.ofproto_parser
>>
>> inst = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
>> actions)]
>>
>> mod = parser.OFPFlowMod(datapath=datapath, priority=priority,
>> match=match, instructions=inst)
>> datapath.send_msg(mod)
>>
>> Packet in handler:
>>
>> @set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
>> def packet_in_handler(self, ev):
>> msg = ev.msg
>> dp = msg.datapath
>> ofp = dp.ofproto
>>
>> if msg.reason == ofp.OFPR_TABLE_MISS:
>> reason = 'TABLE MISS'
>> elif msg.reason == ofp.OFPR_APPLY_ACTION:
>> reason = 'APPLY ACTION'
>> elif msg.reason == ofp.OFPR_INVALID_TTL:
>> reason = 'INVALID TTL'
>> elif msg.reason == ofp.OFPR_ACTION_SET:
>> reason = 'ACTION SET'
>> elif msg.reason == ofp.OFPR_GROUP:
>> reason = 'GROUP'
>> elif msg.reason == ofp.OFPR_PACKET_OUT:
>> reason = 'PACKET OUT'
>> else:
>> reason = 'unknown'
>>
>> if reason == 'PACKET OUT':
>> self.logger.debug('OFPPacketIn received: '
>> 'buffer_id=%x total_len=%d reason=%s '
>> 'table_id=%d cookie=%d match=%s ',
>> msg.buffer_id, msg.total_len, reason,
>> msg.table_id, msg.cookie, msg.match)
>> self.logger.debug('DATAPATH ADDRESS:%s', dp.address)
>>
>> I never recieve a packet in message due o a packet out message. Any help
>> will be appreciated.
>>
>> Thanks in advance.
>>
>>
>>
>> ------------------------------------------------------------
>> ------------------
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>>
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