<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"><base href="x-msg://741/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Amine,<div><br></div><div>Thanks for pointing out the problem. After checking the code I realized that CSMA devices, as they should, pad short packets with empty payload (since Ethernet standard mandates minimum 46 bytes payload). There is no real need to have the assert that was failing for you, so after I disabled it, the simulation start working for me. </div><div><br></div><div>You can fetch the latest commit that I just pushed and try again.</div><div><br></div><div>---</div><div>Alex</div><div><br><div><div>On May 30, 2013, at 2:26 AM, amine <<a href="mailto:amine.elabidi@cristal.rnu.tn">amine.elabidi@cristal.rnu.tn</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple" style="font-family: Monaco; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="WordSection1" style="page: WordSection1; "><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">Hi Alex<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">Thinks for your quick answer.<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">It’s exactly what I have done. I Took the “ndn-simple” example and I changed the devices form P2P to csma. I had a problem in the L3-protocol layer when receiving the first interest packet. It gives me the following error (Interest Payload size must be zero). <o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">When I use the pcap traces, I find that in the P2P case the size of the data filed in the Ethernet Frame was 27 bytes, but with csma Frame it was 50 bytes.<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">Amine<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "> </span></div><div><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(181, 196, 223); padding: 3pt 0cm 0cm; "><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif; ">From:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif; "><span class="Apple-converted-space"> </span>Alex Afanasyev [mailto:alexander.afanasyev@<a href="http://ucla.edu">ucla.edu</a>]<span class="Apple-converted-space"> </span><br><b>Sent:</b><span class="Apple-converted-space"> </span>mercredi 29 mai 2013 18:48<br><b>To:</b><span class="Apple-converted-space"> </span>amine<br><b>Cc:</b><span class="Apple-converted-space"> </span><a href="mailto:ndnsim@lists.cs.ucla.edu">ndnsim@lists.cs.ucla.edu</a><br><b>Subject:</b><span class="Apple-converted-space"> </span>Re: [ndnSIM] device faces<o:p></o:p></span></div></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p> </o:p></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; ">Hi Amine,<o:p></o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p> </o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; ">There are no limitations of the existing ndn::NetDeviceFace to be used only with PointToPoint devices. You should be able to use it with csma, wifi, emu, or any other types of devices without problem. Just create desired topology first and then install NDN stack using ndn::StackHelper.<o:p></o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p> </o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; ">Just in case, I want to remind that when packets are send out of the face, they are send out in "broadcast" fashion (e.g., for ethernet it will use FF:FF:FF:FF:FF:FF mac address). This is not really a problem, but I want to make sure you are aware of that.<o:p></o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p> </o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; ">---<o:p></o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; ">ALex<o:p></o:p></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p> </o:p></div><div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; ">On May 29, 2013, at 12:01 AM, "amine" <<a href="mailto:amine.elabidi@cristal.rnu.tn" style="color: purple; text-decoration: underline; ">amine.elabidi@cristal.rnu.tn</a>> wrote:<o:p></o:p></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><br><br><o:p></o:p></div><div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="color: rgb(31, 73, 125); ">Hi All,</span><o:p></o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="color: rgb(31, 73, 125); ">I’m new using ndnsim, I need to use csma and emu devices with CCN stack. I looked at the code and I find that<span class="apple-converted-space"> </span></span> <span style="color: rgb(31, 73, 125); ">only P2P-device face is developed.</span><o:p></o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">Any Help Please!!</span><o:p></o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">Best Regards</span><o:p></o:p></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 13.5pt; font-family: Monaco, serif; ">_______________________________________________<br>ndnSIM mailing list<br><a href="mailto:ndnSIM@lists.cs.ucla.edu" style="color: purple; text-decoration: underline; "><span style="color: purple; ">ndnSIM@lists.cs.ucla.edu</span></a><br><a href="http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim" style="color: purple; text-decoration: underline; "><span style="color: purple; ">http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim</span></a><o:p></o:p></span></div></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p> </o:p></div></div>_______________________________________________<br>ndnSIM mailing list<br><a href="mailto:ndnSIM@lists.cs.ucla.edu" style="color: purple; text-decoration: underline; ">ndnSIM@lists.cs.ucla.edu</a><br><a href="http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim" style="color: purple; text-decoration: underline; ">http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim</a></div></blockquote></div><br></div></body></html>