<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi,<div class=""><br class=""></div><div class="">assuming that FIBs have indeed been properly configured, have you verified that the nodes that are supposed to receive Interests also register their prefix locally?</div><div class=""><br class=""></div><div class=""><a href="https://github.com/named-data-ndnSIM/ndnSIM/blob/master/apps/ndn-producer.cpp#L82" class="">https://github.com/named-data-ndnSIM/ndnSIM/blob/master/apps/ndn-producer.cpp#L82</a></div><div class=""><br class=""></div><div class="">Thanks,</div><div class=""><br class=""><div class="">
<div class=""><div class=""><div class=""><span class="" style="float: none; display: inline !important;">Spyridon (Spyros) Mastorakis</span><br class=""><span class="" style="float: none; display: inline !important;">Personal Website: </span><a href="http://cs.ucla.edu/~mastorakis/" class="">http://cs.ucla.edu/~mastorakis/</a><br class=""><span class="" style="float: none; display: inline !important;">Internet Research Laboratory</span><br class=""><span class="" style="float: none; display: inline !important;">Computer Science Department</span><br class=""><span class="" style="float: none; display: inline !important;">UCLA</span></div></div></div>
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<br class=""><div><blockquote type="cite" class=""><div class="">On Apr 11, 2019, at 1:17 PM, Ioanna Kapetanidou <<a href="mailto:ikapetan@ee.duth.gr" class="">ikapetan@ee.duth.gr</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Hi,<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">I’m currently working on creating a simple trust mechanism in ndnSIM. In order to achieve this,I have created a consumer and a producer application, based on provided codes of costum-app and hijacker applications. I have used a tree topology in which I have installed the consumer application on 10 leaves, the producer application on other 10 leaves and an extra application on root. The functionality of my mechanism is the above:<o:p class=""></o:p></span></div><ol start="1" type="1" style="margin-bottom: 0cm; margin-top: 0cm;" class=""><li class="MsoListParagraph" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US" class="">Consumers send interests for data packets</span><o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US" class="">Producers reply with data packets</span><o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US" class="">Consumers rate the received data packets</span><o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US" class="">Root periodically sends interests to consumers serially requesting average rating per producer</span><o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US" class="">Consumers reply with data packets providing the average rating per producer and number of ratings they used</span><o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US" class="">Root based on data collected computes the reputation of each producer</span><o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US" class="">Two extra consumers send interests periodically requesting the reputation of a randomly selected producer</span><o:p class=""></o:p></li></ol><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">My code works as expected with the tree topology. Then I tried to import GEANT topology and implement my mechanism there. I selected the nodes with the 1 or 2 neighbors to install consumers and producers, as it is on a tree topology. This time, although FIB tables seem to be filled correctly, when sending an interest it gets rejected and returns a nack with “no route” reason.<span class="Apple-converted-space"> </span><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Do you have any possible explanation for that, or a suggestion for what I should check?<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Thanks in advance,<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Ioanna</span><o:p class=""></o:p></div></div></div></blockquote></div><br class=""></div></body></html>