[Ndn-interest] (no subject)

Thompson, Jeff jefft0 at remap.ucla.edu
Mon Oct 23 10:42:16 PDT 2017

Hi Giuseppe,

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.

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?

- Jeff T

From: Ndn-interest <ndn-interest-bounces at lists.cs.ucla.edu<mailto:ndn-interest-bounces at lists.cs.ucla.edu>> on behalf of Giuseppe Carella <gcarella228 at gmail.com<mailto:gcarella228 at gmail.com>>
Date: Monday, October 23, 2017 at 5:10:00
To: "ndn-interest at lists.cs.ucla.edu<mailto:ndn-interest at lists.cs.ucla.edu>" <ndn-interest at lists.cs.ucla.edu<mailto:ndn-interest at lists.cs.ucla.edu>>, nfd-dev <nfd-dev at lists.cs.ucla.edu<mailto:nfd-dev at lists.cs.ucla.edu>>
Subject: Re: [Ndn-interest] (no subject)

I forgot to say that I am using ndn-js and one nfd for the forwading.

2017-10-23 14:08 GMT+02:00 Giuseppe Carella <gcarella228 at gmail.com<mailto:gcarella228 at gmail.com>>:
Good morning community,

I am trying to send an image from a producer to a consumer.

This is the use-case:
-The consumer sends an interest packet to the producer
-The producer sends a set of data packets to the consumer.

The problem is that the consumer calls the callback "onData" only once.
I thought that onData once called was always listening the incoming data packets.
That's the reason why on my main function I call "face.expressInterest(name, onData, onTimeout);" only once. Could it be problem?

Thank you.
Best regards,

Ndn-interest mailing list
Ndn-interest at lists.cs.ucla.edu<mailto:Ndn-interest at lists.cs.ucla.edu>

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