After implementing my this ARP code in my controller I am recieving this error:
ERROR:openflow.of_01:[00-00-00-00-00-03 4] OpenFlow Error:
[00-00-00-00-00-03 4] Error: header:
[00-00-00-00-00-03 4] Error: version: 1
[00-00-00-00-00-03 4] Error: type: 1 (OFPT_ERROR)
[00-00-00-00-00-03 4] Error: length: 76
[00-00-00-00-00-03 4] Error: xid: 117
[00-00-00-00-00-03 4] Error: type: OFPET_BAD_REQUEST (1)
[00-00-00-00-00-03 4] Error: code: OFPBRC_BUFFER_EMPTY (7)
[00-00-00-00-00-03 4] Error: datalen: 64
[00-00-00-00-00-03 4] Error: 0000: 01 0e 00 58 00 00 00 75 00 00 00 00 00 03
00 00 ...X...u........
[00-00-00-00-00-03 4] Error: 0010: 00 00 00 02 00 00 00 00 00 01 ff ff 00 00
08 06 ................
[00-00-00-00-00-03 4] Error: 0020: 00 01 00 00 0a 00 00 02 0a 00 00 01 00 00
00 00 ................
[00-00-00-00-00-03 4] Error: 0030: 00 00 00 00 00 00 00 00 00 00 00 0a 00 1e
80 00 …………….
Any ideas how to overcome?
Thanks
Muhammad
On Nov 13, 2013, at 1:03 PM, Muhammad Furqan Gagan <furqan.ga...@gmail.com>
wrote:
> I have implemented this code to handle ARP.. is it ok ? I am not sure about
> that.. need your comments please
>
> a= packet.find('arp')
> if a:
> if a.prototype == arp.PROTO_TYPE_IP:
> if a.hwtype == arp.HW_TYPE_ETHERNET:
> if a.protosrc != 0:
> if a.protosrc in arp_tale:
> if a.hwsrc == True:
> Mac = EthAddr(a.hwsrc)
> arp_table[a.protosrc] = Mac:
>
>
> if a.opcode == arp.REQUEST:
> # Maybe we can answer
>
> if a.protodst in arp_table:
> r = arp()
> r.hwtype = a.hwtype
> r.prototype = a.prototype
> r.hwlen = a.hwlen
> r.protolen = a.protolen
> r.opcode = arp.REPLY
> r.hwdst = a.hwsrc
> r.protodst = a.protosrc
> r.protosrc = a.protodst
> Mac = arp_table[a.protodst]
>
> Mac = _dpid_to_mac(dpid)
> r.hwsrc = Mac
> e = ethernet(type=packet.type, src=_dpid_to_mac(dpid),
> dst=a.hwsrc)
> e.payload = r
> log.info("%s answering ARP for %s" % (dpid_to_str(dpid),
> str(r.protosrc)))
> msg = of.ofp_packet_out()
> msg.data = e.pack()
> msg.actions.append(of.ofp_action_output(port =
> of.OFPP_IN_PORT))
> msg.in_port = inport
> event.connection.send(msg)
>
> else:
> msg = of.ofp_packet_out()
> msg.actions.append(of.ofp_action_output(port = of.OFPP_FLOOD))
> msg.data = event.ofp
> event.connection.send(msg.pack())
>
> Thanks
>
> Muhammad
>
> On Nov 13, 2013, at 12:56 PM, Murphy McCauley <murphy.mccau...@gmail.com>
> wrote:
>
>> Durga is spot on, but I'll throw in another couple things you might look at:
>> forwarding.l3_learning handles ARP
>> proto.arp_helper attempts to make it easier to work with ARP
>>
>> (Oh, and misc.arp_responder has moved to proto.arp_responder in newer
>> versions.)
>>
>> -- Murphy
>>
>> On Nov 13, 2013, at 2:06 AM, durga <c.vijaya.du...@gmail.com> wrote:
>>
>>>
>>> hello,
>>> Seems pox supports packet type as arp, can be found here (pox / pox / lib /
>>> packet / arp.py ), as well as may be you can get some help by refering to
>>> the below example.
>>> pox / pox / misc / arp_responder.py
>>>
>>> Cheers!
>>> Durga
>>>
>>>
>>>
>>> On Wed, Nov 13, 2013 at 8:35 PM, Muhammad Furqan Gagan
>>> <furqan.ga...@gmail.com> wrote:
>>> Hello,
>>>
>>> Any one know how to handle ARP request in controller?
>>>
>>> Thanks
>>>
>>> Muhammad
>>>
>>
>
