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<div>Hi Giuseppe,</div>
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<div>By design, NDN is “one Data packet in response to one Interest”, for flow control and other reasons. (Actually, it can be “one Data packet for multiple interests” if a forwarder has accumulated pending Interests from multiple consumers which all match
a received Data packet.) The onData callback belongs to the library’s internal pending Interest table. When a matching Data packet is received, the library calls the onData callback and deletes the entry in the pending Interest table, so as you say, it is
only used once.</div>
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<div>A large object such as an image is usually split up into multiple segments by the producer. Are you using some program to split the image into segments?</div>
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<div>- Jeff T</div>
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<span style="font-weight:bold">From: </span>Ndn-interest <<a href="mailto:ndn-interest-bounces@lists.cs.ucla.edu">ndn-interest-bounces@lists.cs.ucla.edu</a>> on behalf of Giuseppe Carella <<a href="mailto:gcarella228@gmail.com">gcarella228@gmail.com</a>><br>
<span style="font-weight:bold">Date: </span>Monday, October 23, 2017 at 5:10:00<br>
<span style="font-weight:bold">To: </span>"<a href="mailto:ndn-interest@lists.cs.ucla.edu">ndn-interest@lists.cs.ucla.edu</a>" <<a href="mailto:ndn-interest@lists.cs.ucla.edu">ndn-interest@lists.cs.ucla.edu</a>>, nfd-dev <<a href="mailto:nfd-dev@lists.cs.ucla.edu">nfd-dev@lists.cs.ucla.edu</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [Ndn-interest] (no subject)<br>
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<div dir="ltr">I forgot to say that I am using ndn-js and one nfd for the forwading.
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<div class="gmail_quote">2017-10-23 14:08 GMT+02:00 Giuseppe Carella <span dir="ltr">
<<a href="mailto:gcarella228@gmail.com" target="_blank">gcarella228@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div>Good morning community,<br>
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I am trying to send an image from a producer to a consumer. <br>
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<div>This is the use-case:</div>
<div>-The consumer sends an interest packet to the producer <br>
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<div>-The producer sends a set of data packets to the consumer.</div>
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The problem is that the consumer calls the callback "onData" only once.</div>
<div>I thought that onData once called was always listening the incoming data packets.</div>
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<div>That's the reason why on my main function I call "face.expressInterest(name, onData, onTimeout);" only once. Could it be problem?
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<div>Thank you.</div>
<div>Best regards,</div>
<div>Giuseppe.<br>
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