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
>>>
>>>
>>>
>>
>>
>>
>>
>
>
