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Shouldn’t the NAK have a limited lifetime?
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<div>If I ask for /news/version=100 an the provider only has version=98, it would NACK 100. But, the provider will eventually want to publish version 100.</div>
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<div>Marc</div>
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<div>On Oct 15, 2014, at 8:13 AM, Junxiao Shi <<a href="mailto:shijunxiao@email.arizona.edu">shijunxiao@email.arizona.edu</a>> wrote:</div>
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<div dir="ltr">Hi Marco
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<div>If Router2 has a Route toward the ContentProvider for this Name, it cannot detect the content doesn't exist.</div>
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<div>ContentProvider should reply with a provider-generated NACK, which is a type of Data, that indicates the non-existence of this content. A provider-generated NACK is cachable on routers.</div>
<div>A future Interest toward this Name would be satisifed by this provider-generated NACK from the ContentStore, and doesn't have to go to the ContentProvider.</div>
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<div>Yours, Junxiao</div>
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<div class="gmail_quote">On Wed, Oct 15, 2014 at 8:01 AM, Marco Ulgelmo <span dir="ltr">
<<a href="mailto:marco.ulge@gmail.com" target="_blank">marco.ulge@gmail.com</a>></span> wrote:<br>
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<div>Hello,<br>
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I've recently began studying how NDN works and i have a question about unsatisfied Interests.<br>
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Lets say that an attacker generates a fake Interest packet that surely doesn't exist. Let's assume that this packet is identified by the following name: /google/randomtext<br>
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As far as i know i shuold be able to reach /google but i won't be able to retrieve the content as it doesn't exist.<br>
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Considering the following scenario:<br>
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Interest -> Router1 -> Router2 -> Content Provider.<br>
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Is Router2 able to determine that the content doesn't exist? Can this information be sent back to Router2 from the Content Provider (which surely knows that he doesn't have that resource)?<br>
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Thanks,<br>
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Marco<br>
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