Use Wireshark to examine the destination host's interface. Do you see the
packet? Is it as you expect it?
-- Murphy
On Feb 28, 2015, at 11:06 AM, Sandesh Shrestha <sande...@ualberta.ca> wrote:
> Thank you very much for pointing that out Murphy. However, I am still not
> able to get the response ping. Please share if you have any idea.
>
> Thanks,
> Sandesh Shrestha
>
> On Fri, Feb 27, 2015 at 8:39 PM, Murphy McCauley <murphy.mccau...@gmail.com>
> wrote:
> Jumping in with a quick comment below...
>
> On Feb 27, 2015, at 11:15 AM, Sandesh Shrestha <sande...@ualberta.ca> wrote:
>
>> Hey Lucas,
>>
>> Thanks for the help. I was able to send icmp packets to mininet host using
>> the code below.
>> I used arbitrary source mac address and source ip. The destination ip and
>> destination mac address is the values of
>> the mininet host connected in port 1 of the switch.
>>
>> However I was not able to get the icmp reply from the host.Could you please
>> check what the probem is.
>>
>> from pox.core import core
>> import pox.openflow.libopenflow_01 as of
>> import pox.lib.packet as pkt
>> from pox.lib.addresses import EthAddr,IPAddr
>>
>> log= core.getLogger()
>>
>> class Icmp(object):
>> def __init__(self):
>> core.openflow.addListeners(self)
>>
>> def _handle_PacketIn(self,event):
>> packet=event.parsed
>>
>>
>> if packet.find("icmp"):
>> log.debug("Icmp message received")
>>
>> def _handle_ConnectionUp(self,event):
>>
>> #This part is the ping reply
>> icmp=pkt.icmp()
>> icmp.type=pkt.TYPE_ECHO_REQUEST
>> echo=pkt.ICMP.echo(payload="0123456789")
>> icmp.payload= echo
>> log.debug("This is the icmp payload %s"%icmp.payload)
>>
>> #Create IP payload
>> ipp = pkt.ipv4()
>> ipp.protocol=ipp.ICMP_PROTOCOL
>> ipp.srcip=IPAddr("10.0.0.10")
>> ipp.dstip=IPAddr("10.0.0.1")
>> ipp.payload=icmp
>> log.debug( "This is the ip payload %s"%ipp.payload)
>>
>> #Create Ethernet Payload
>> e= pkt.ethernet()
>> e.src=EthAddr("00:00:00:00:00:10")
>> e.dst=EthAddr("00:00:00:00:00:01")
>> e.type=e.IP_TYPE
>> e.payload=ipp
>> log.debug( "This is the ethernet payload %s"%e.payload)
>>
>> #Send it to first input port
>> msg = of.ofp_packet_out()
>> msg.actions.append(of.ofp_action_output(port=1))
>> msg.date=e.pack()
>
> .. I don't know what other problems this code may have, but the above will
> certainly be enough to keep it from working. You mean "msg.data".
>
>> msg.in_port=of.OFPP_NONE
>> event.connection.send(msg)
>>
>> def launch():
>>
>> def start_switch(event):
>> log.debug("Controlling %s"%(event.connection))
>> Icmp()
>> core.openflow.addListenerByName("ConnectionUp",start_switch)
>>
>>
>> Thanks,
>> Sandesh Shrestha
>> www.sandeshshrestha.blogspot.com
>>
>> On Thu, Feb 26, 2015 at 6:17 AM, Lucas Brasilino <lr...@cin.ufpe.br> wrote:
>> Hi Sadesh,
>>
>> I think you can construct a ICMP request as below. I did use python
>> interactively just as example.
>> The ethernet packet object 'eth' must be sent by using openflow's
>> ofp_packet_out() (method) message along
>> with ofp_action_output() (method) action to inform switch which output port
>> the packet must be sent from.
>> python was started from pox installation directory.
>>
>> >>> import pox.lib.packet as pkt
>> >>> from pox.lib.addresses import IPAddr,EthAddr
>> >>> echo = pkt.ICMP.echo(payload="0123456789")
>> >>> icmp = pkt.icmp(type=pkt.ICMP.TYPE_ECHO_REQUEST,payload=echo)
>> >>> ip =
>> >>> pkt.ipv4(srcip=IPAddr("10.0.0.1"),dstip=("10.0.0.2"),protocol=pkt.ipv4.ICMP_PROTOCOL,payload=icmp)
>> >>> eth =
>> >>> pkt.ethernet(src=EthAddr("aa:bb:cc:dd:ee:fe"),dst=EthAddr("aa:bb:cc:dd:ee:ff"),type=pkt.ethernet.IP_TYPE,payload=ip)
>> >>> print eth
>> [aa:bb:cc:dd:ee:fe>aa:bb:cc:dd:ee:ff IP]
>> >>> print eth.payload
>> [IP+ICMP 10.0.0.1>10.0.0.2 (cs:00 v:4 hl:5 l:20 t:64)]
>> >>> print eth.payload.payload
>> [t:ECHO_REQUEST c:0 chk:0][ICMP id:25863 seq:0]
>>
>>
>> I didn't test myself now but it should work :)
>> Hope it helps
>>
>> --
>> Att
>> Lucas Brasilino
>> MSc Student @ Federal University of Pernambuco (UFPE) / Brazil
>> twitter: @lucas_brasilino
>>
>>
>> 2015-02-26 0:03 GMT-03:00 Sandesh Shrestha <sande...@ualberta.ca>:
>>
>> Dear All,
>>
>> I want to create an ICMP request(not reply) packet in POX. How can I do
>> that?Especially what will be the icmp payload and source ip and mac address
>> so that I get reply from the mininet host.
>>
>>
>> Thanks,
>> Sandesh Shrestha
>> www.sandeshshrestha.blogspot.com
>>
>>
>>
>>
>>
>>
>>
>
>
