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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi Qinchao</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I understand your question as: given a ContentStore and a Data packet, determine whether the same Data packet already exists in the ContentStore.</p><p class=MsoNormal>This can be achieved as:</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Courier New"'>void<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>isDataInContentStore(const ndn::Data& data, const nfd::cs::Cs& cs,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> std::function<void(bool)> cb)<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>{<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> ndn::Name fullName = data.getFullName();<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> ndn::Interest interest(fullName);<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> cs.find(interest,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> bind([cb] { cb(true); }),<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> bind([cb] { cb(false); }));<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>}<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>First we create an Interest that would match the specified Data packet if it exists in the CS; the Interest would not match any other Data packet because it contains the implicit digest. The CS is then queried with the Interest, and the result is returned asynchronously.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Yours, Junxiao</p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:15045081947@163.com"><span lang=ZH-CN style='font-family:DengXian'>潘庆超</span></a><br><b>Sent: </b>Friday, July 1, 2016 07:06<br><b>To: </b><a href="mailto:ndnsim@lists.cs.ucla.edu">ndnsim@lists.cs.ucla.edu</a><br><b>Subject: </b>[ndnSIM] Find corresponding CS entry for the given data packet</p></div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Arial",sans-serif;color:black'>hello ,i am doing some simulations about NDN . I have a problem. i want to know whether there are some contents in cs can match the given data packet when a node receive a data packet, how can i do ?<o:p></o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p><br> </p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p></div></body></html>