<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Hi huyao,</div><div><br></div>fib::Entry object associated with exactly one prefix, so RemoveFace method on fib::Entry will not have impact on any other entries.<div><br></div><div>Let me show an example:</div><div><br></div><div># step one: find a FIB entry for the prefix associated with Interest</div><div>Ptr<fib::Entry> entry = fib->LongestPrefixMatch (interest);</div><div><br></div><div># remove a specific face</div><div>entry->RemoveFace (face_to_remove);</div><div><br></div><div>---</div><div><br></div><div>This will not impact any other FIB entries.</div><div><br></div><div>I just realized that the current FIB interface doesn't provide direct way to do lookup just using Name (=NameComponents). But it would be trivial to add this functionality, as underlying data structures fully support that. Let me know if you need it. (Alternatively, you can also enumerate all FIB entries using Begin/End/Next methods and find the one you need, but it can be too inefficient.)</div><div><br></div><div>---</div><div>Alex</div><div><br></div><div><div><div>On Mar 15, 2013, at 1:33 AM, yao hu <<a href="mailto:huyao0107@gmail.com">huyao0107@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Hi Alex,<div><br></div><div>Thanks for your explanation!</div><div><br></div><div>I am sorry I still have the perplexity. I saw that <span style="white-space:pre-wrap">fib::Entry-></span><span style="white-space:pre-wrap">RemoveFace call just has one parameter (</span><span style="font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12px;line-height:15px;background-color:rgb(250,250,250)">const Ptr< </span><a class="el" href="http://ndnsim.net/doxygen/classns3_1_1ndn_1_1_face.html" style="color:rgb(104,104,104);font-weight:bold;text-decoration:none;font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12px;line-height:15px">Face</a><span style="font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12px;line-height:15px;background-color:rgb(250,250,250)"> > &face) without relation to some specific prefix, so I guess if I want to delete one specific face from one specific prefix, it will have the same impact to other prefixes which also have the face. </span></div>
<div><span style="font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12px;line-height:15px;background-color:rgb(250,250,250)"><br></span></div><div><span style="font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12px;line-height:15px;background-color:rgb(250,250,250)">My intention is to delete one specific face from a specific prefix, while any other prefix still retains the face if it has. Is it feasible in the current ndnsim? If not, how do I do to implement such a functionality? Or my understanding for this issue has some error?</span></div>
<div><span style="font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12px;line-height:15px;background-color:rgb(250,250,250)"><br></span></div><div><span style="font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12px;line-height:15px;background-color:rgb(250,250,250)">Regards,</span></div>
<div><span style="font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12px;line-height:15px;background-color:rgb(250,250,250)">huyao</span></div><div><span style="font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12px;line-height:15px;background-color:rgb(250,250,250)"><br>
</span></div><div><br><div class="gmail_quote">2013/3/15 Alex Afanasyev <span dir="ltr"><<a href="mailto:alexander.afanasyev@ucla.edu" target="_blank">alexander.afanasyev@ucla.edu</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>My small correction :). I meant that it is forwarding strategy job to pick a particular face from FIB entry.<br>
<br>---<div>Alex</div></div><div><div><br>On Mar 14, 2013, at 7:55 PM, Alex Afanasyev <<a href="mailto:alexander.afanasyev@ucla.edu" target="_blank">alexander.afanasyev@ucla.edu</a>> wrote:<br><br></div>
<blockquote type="cite"><div><div>Hi huyao,</div><div><br></div><div>You are right, for the single prefix there will be only one FIB entry created and it is forwarding strategy job to pick a particular one to forward an Interest in this prefix.</div>
<div><br></div><div>There is an interface in fib::Entry to remove a specific face from s specific FIB entry. You can also check recent conversation <span style="font-family:'.HelveticaNeueUI';font-size:15px;line-height:19px;white-space:nowrap"><a href="http://www.lists.cs.ucla.edu/pipermail/ndnsim/2013-March/000242.html" target="_blank">http://www.lists.cs.ucla.edu/pipermail/ndnsim/2013-March/000242.html</a> with more details about that.</span></div>
<div><span style="font-family:'.HelveticaNeueUI';font-size:15px;line-height:19px;white-space:nowrap"><br></span></div><div><br></div><div>---<div>Alex</div></div><div><br>On Mar 14, 2013, at 7:28 PM, yao hu <<a href="mailto:huyao0107@gmail.com" target="_blank">huyao0107@gmail.com</a>> wrote:<br>
<br></div><blockquote type="cite">a supplement.. If so, is there a way to delete just some face like face 0 from the fib entry with the prefix /data without deleting face 1?<div><br></div><div>Thanks for your reply!</div>
<div><br></div><div><br><div class="gmail_quote">
2013/3/15 yao hu <span dir="ltr"><<a href="mailto:huyao0107@gmail.com" target="_blank">huyao0107@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear ndnsimers,<div><br></div><div>Assume that there is an existing fib entry with the prefix /data, face 0 in some specific node. Now by using the function Add() or AddRoute(), a new fib entry will be added with the same prefix /data, but with the different face 1. So I wonder in ndnsim, they are counted as two fib entries in FIB or just seemed as one. For my understanding, the answer is the latter. Here, in Fib class, <font face="arial, helvetica, sans-serif"><a href="http://ndnsim.net/doxygen/classns3_1_1ndn_1_1_fib.html#a93a184d9fdc1ace4ea82647c5834ff9c" style="font-weight:bold;text-decoration:none;line-height:15px" target="_blank">GetSize</a><span style="line-height:15px;background-color:rgb(250,250,250)"> () still equals to 1. Am I right?</span> </font></div>
<div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">Regards,</font></div><div><font face="arial, helvetica, sans-serif">huyao</font></div>
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