[Ndn-interest] Question about unsatisfied Interests

[Marc.Mosko at parc.com]

Shouldn’t the NAK have a limited lifetime?

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.

Marc

On Oct 15, 2014, at 8:13 AM, Junxiao Shi <shijunxiao at email.arizona.edu<mailto:shijunxiao at email.arizona.edu>> wrote:

Hi Marco

If Router2 has a Route toward the ContentProvider for this Name, it cannot detect the content doesn't exist.

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.
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.

Yours, Junxiao

On Wed, Oct 15, 2014 at 8:01 AM, Marco Ulgelmo <marco.ulge at gmail.com<mailto:marco.ulge at gmail.com>> wrote:
Hello,

I've recently began studying how NDN works and i have a question about unsatisfied Interests.

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

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.

Considering the following scenario:

Interest -> Router1 -> Router2 -> Content Provider.

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)?

Thanks,

Marco

_______________________________________________
Ndn-interest mailing list
Ndn-interest at lists.cs.ucla.edu<mailto:Ndn-interest at lists.cs.ucla.edu>
http://www.lists.cs.ucla.edu/mailman/listinfo/ndn-interest


_______________________________________________
Ndn-interest mailing list
Ndn-interest at lists.cs.ucla.edu<mailto:Ndn-interest at lists.cs.ucla.edu>
http://www.lists.cs.ucla.edu/mailman/listinfo/ndn-interest

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.lists.cs.ucla.edu/pipermail/ndn-interest/attachments/20141015/ce3a8410/attachment.html>