<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">This is very likely because you're trying to send the same buffer more than once. Do you have multiple things listening to PacketIn events (in your own code, or perhaps you are running your code and another component like l2_learning)? If so, read the "Events With Multiple Listeners" section of the manual.<div><br></div><div>A more generic piece of advice is to look at the messages you send. You can see the XID of this error is 117. If you had captured the traffic to the switch or logged the right things, you could find the command (packet out or flow mod) which had 117 which might help illuminate what's going on.<br><div><br></div><div>Also, I'd suggest you read the FAQ entry about requesting help from the mailing list.</div><div><br></div><div>Hope that helps.</div><div><br></div><div>-- Murphy</div><div><br><div><div>On Nov 13, 2013, at 12:13 PM, Muhammad Furqan Gagan <<a href="mailto:furqan.gagan@gmail.com">furqan.gagan@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html charset=windows-1252"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">After implementing my this ARP code in my controller I am recieving this error:<div><br></div><div><span style="background-color: rgb(255, 255, 255);"><font color="#333333" face="lucida grande, tahoma, verdana, arial, sans-serif" size="2"><span style="line-height: 17px; white-space: pre-wrap;">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 …………….</span></font></span></div><div><font color="#333333" face="lucida grande, tahoma, verdana, arial, sans-serif" size="2"><span style="line-height: 17px; white-space: pre-wrap; background-color: rgb(255, 255, 255);"><br></span></font></div><div><font color="#333333" face="lucida grande, tahoma, verdana, arial, sans-serif" size="2"><span style="line-height: 17px; white-space: pre-wrap; background-color: rgb(255, 255, 255);">Any ideas how to overcome?</span></font></div><div><font color="#333333" face="lucida grande, tahoma, verdana, arial, sans-serif" size="2"><span style="line-height: 17px; white-space: pre-wrap; background-color: rgb(255, 255, 255);"><br></span></font></div><div><font color="#333333" face="lucida grande, tahoma, verdana, arial, sans-serif" size="2"><span style="line-height: 17px; white-space: pre-wrap; background-color: rgb(255, 255, 255);">Thanks</span></font></div><div><font color="#333333" face="lucida grande, tahoma, verdana, arial, sans-serif" size="2"><span style="line-height: 17px; white-space: pre-wrap; background-color: rgb(255, 255, 255);"><br></span></font></div><div><font color="#333333" face="lucida grande, tahoma, verdana, arial, sans-serif" size="2"><span style="line-height: 17px; white-space: pre-wrap; background-color: rgb(255, 255, 255);">Muhammad</span></font></div><div><font color="#333333" face="lucida grande, tahoma, verdana, arial, sans-serif" size="2"><span style="line-height: 17px; white-space: pre-wrap; background-color: rgb(255, 255, 255);"><br></span></font><div><div>On Nov 13, 2013, at 1:03 PM, Muhammad Furqan Gagan <<a href="mailto:furqan.gagan@gmail.com">furqan.gagan@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">I have implemented this code to handle ARP.. is it ok ? I am not sure about that.. need your comments please<div><br></div><div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> a= packet.find('arp')</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> if a:</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> if a.prototype == arp.PROTO_TYPE_IP:</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> if a.hwtype == arp.HW_TYPE_ETHERNET:</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> if a.protosrc != 0:</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> if a.protosrc in arp_tale:</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> if a.hwsrc == True:</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> Mac = EthAddr(a.hwsrc)</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> arp_table[a.protosrc] = Mac:</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"><br></div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> </div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> if a.opcode == arp.REQUEST:</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> # Maybe we can answer</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"><br></div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> if a.protodst in arp_table:</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> r = arp()</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> r.hwtype = a.hwtype</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> r.prototype = a.prototype</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> r.hwlen = a.hwlen</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> r.protolen = a.protolen</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> r.opcode = arp.REPLY</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> r.hwdst = a.hwsrc</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> r.protodst = a.protosrc</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> r.protosrc = a.protodst</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> Mac = arp_table[a.protodst]</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> </div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> Mac = _dpid_to_mac(dpid)</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> r.hwsrc = Mac</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> e = ethernet(type=packet.type, src=_dpid_to_mac(dpid),</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> dst=a.hwsrc)</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> e.payload = r</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> log.info("%s answering ARP for %s" % (dpid_to_str(dpid),</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> str(r.protosrc)))</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> msg = of.ofp_packet_out()</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> msg.data = e.pack()</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> msg.actions.append(of.ofp_action_output(port =</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> of.OFPP_IN_PORT))</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> msg.in_port = inport</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> event.connection.send(msg)</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> </div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> else:</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> msg = of.ofp_packet_out()</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> msg.actions.append(of.ofp_action_output(port = of.OFPP_FLOOD))</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> msg.data = event.ofp</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"></div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"> event.connection.send(msg.pack())</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"><br></div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;">Thanks</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"><br></div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;">Muhammad</div><div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;"><br></div><div><div><div>On Nov 13, 2013, at 12:56 PM, Murphy McCauley <<a href="mailto:murphy.mccauley@gmail.com">murphy.mccauley@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Durga is spot on, but I'll throw in another couple things you might look at:<div>forwarding.l3_learning handles ARP</div><div>proto.arp_helper attempts to make it easier to work with ARP</div><div><br></div><div>(Oh, and misc.arp_responder has moved to proto.arp_responder in newer versions.)</div><div><br></div><div>-- Murphy</div><div><br><div><div>On Nov 13, 2013, at 2:06 AM, durga <<a href="mailto:c.vijaya.durga@gmail.com">c.vijaya.durga@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(153,51,0)"><br></div><div class="gmail_default"><font face="courier new, monospace" color="#990000">hello,</font></div>
<div class="gmail_default"><font face="courier new, monospace" color="#990000">Seems pox supports packet type as arp, can be found here (<span class="" style="font-weight:bold;line-height:25px"><span><a href="https://github.com/brownbytes/pox" style="text-decoration:none"><span>pox</span></a></span></span><span class="" style="line-height:25px"> / </span><span style="line-height:25px"><a href="https://github.com/brownbytes/pox/tree/betta/pox" style="text-decoration:none"><span>pox</span></a></span><span class="" style="line-height:25px"> / </span><span style="line-height:25px"><a href="https://github.com/brownbytes/pox/tree/betta/pox/lib" style="text-decoration:none"><span>lib</span></a></span><span class="" style="line-height:25px"> / </span><span style="line-height:25px"><a href="https://github.com/brownbytes/pox/tree/betta/pox/lib/packet" style="text-decoration:none"><span>packet</span></a></span><span class="" style="line-height:25px"> / </span><strong class="" style="line-height:25px">arp.py</strong><span style="line-height:25px"> ), as well as may be you can get some help by refering to the below example.</span></font></div>
<div class="gmail_default"><font face="courier new, monospace" color="#990000"><span style="line-height:18px"> </span><span style="line-height:18px"></span><div class="" style="margin:0px;display:inline-block"><span class="" style="font-weight:bold"><span><a href="https://github.com/brownbytes/pox" style="text-decoration:none">pox</a></span></span><span class=""> / </span><span><a href="https://github.com/brownbytes/pox/tree/betta/pox" style="text-decoration:none">pox</a></span><span class=""> / </span><span><a href="https://github.com/brownbytes/pox/tree/betta/pox/misc" style="text-decoration:none">misc</a></span><span class=""> / </span><strong class="">arp_responder.py</strong></div>
</font><br></div></div><div class="gmail_extra"><br clear="all"><div>Cheers!<br>Durga<br><br></div>
<br><br><div class="gmail_quote">On Wed, Nov 13, 2013 at 8:35 PM, Muhammad Furqan Gagan <span dir="ltr"><<a href="mailto:furqan.gagan@gmail.com" target="_blank">furqan.gagan@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello,<br>
<br>
Any one know how to handle ARP request in controller?<br>
<br>
Thanks<br>
<span class="HOEnZb"><font color="#888888"><br>
Muhammad<br>
</font></span></blockquote></div><br></div>
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