<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><base href="x-msg://741/"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Monaco;
panose-1:0 0 0 0 0 0 0 0 0 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
span.apple-converted-space
{mso-style-name:apple-converted-space;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>HI Alex,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks, then you are saying that by only disabling the assert it will work just fine.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Amine<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Alex Afanasyev [mailto:alexander.afanasyev@ucla.edu] <br><b>Sent:</b> jeudi 30 mai 2013 17:25<br><b>To:</b> amine<br><b>Cc:</b> ndnsim@lists.cs.ucla.edu<br><b>Subject:</b> Re: [ndnSIM] device faces<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi Amine,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>You can fetch the latest commit that I just pushed and try again.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>---<o:p></o:p></p></div><div><p class=MsoNormal>Alex<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On May 30, 2013, at 2:26 AM, amine <<a href="mailto:amine.elabidi@cristal.rnu.tn">amine.elabidi@cristal.rnu.tn</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Alex</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thinks for your quick answer.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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). </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Amine</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span class=apple-converted-space><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> </span></span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>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</span><o:p></o:p></p></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><div><p class=MsoNormal>Hi Amine,<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>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></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>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></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>---<o:p></o:p></p></div></div><div><div><p class=MsoNormal>ALex<o:p></o:p></p></div></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><div><div><p class=MsoNormal>On May 29, 2013, at 12:01 AM, "amine" <<a href="mailto:amine.elabidi@cristal.rnu.tn"><span style='color:purple'>amine.elabidi@cristal.rnu.tn</span></a>> wrote:<o:p></o:p></p></div></div><div><p class=MsoNormal><br><br><br><o:p></o:p></p></div><div><div><div><p class=MsoNormal><span style='color:#1F497D'>Hi All,</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='color:#1F497D'>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:#1F497D'>only P2P-device face is developed.</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Any Help Please!!</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Best Regards</span><o:p></o:p></p></div></div><div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Monaco","serif"'>_______________________________________________<br>ndnSIM mailing list<br><a href="mailto:ndnSIM@lists.cs.ucla.edu"><span style='color:purple'>ndnSIM@lists.cs.ucla.edu</span></a><br><a href="http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim"><span style='color:purple'>http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim</span></a></span><o:p></o:p></p></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Monaco","serif"'>_______________________________________________<br>ndnSIM mailing list<br><a href="mailto:ndnSIM@lists.cs.ucla.edu"><span style='color:purple'>ndnSIM@lists.cs.ucla.edu</span></a><br><a href="http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim"><span style='color:purple'>http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim</span></a><o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>