Hi Sandesh,
> 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.
If mininet's destination host is connected to the same switch of your
source host or it is connected to other switch controlled by Pox (or
another OF controller) as well, the ICMP reply must be issued by the OF
component too. Isn't that the case ?
--
Att
Lucas Brasilino
MSc Student @ Federal University of Pernambuco (UFPE) / Brazil
twitter: @lucas_brasilino
2015-02-28 16:06 GMT-03:00 Sandesh Shrestha <sande...@ualberta.ca>:
> 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
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>>
>
