[ndnSIM] NACKs in ndnSIM2.0?

[Spyridon (Spyros) Mastorakis]

Hello Christian,

there is an active ongoing discussion about NACKs. Probably, there would be more than one types of NACKs that will be introduced to the protocol. As soon as an official decision is reached, NACKs will be supported by the libraries and NFD and will be introduced to ndnSIM as well. 

--
Spyridon (Spyros) Mastorakis
Personal Website: http://cs.ucla.edu/~mastorakis/
Internet Research Laboratory
PhD Computer Science
UCLA




> On Feb 8, 2015, at 10:47 AM, Christian Kreuzberger <christian.kreuzberger at itec.aau.at> wrote:
> 
> Hi,
> 
> I have a follow-up question about NACKs in NFD/ndnSIM:
> are there ongoing discussions or RFCs about how NACKs should be used and/or
> interpreted? http://named-data.net/doc/ndn-tlv/data.html states that NACK has
> been removed on purpose, but: "NACK is used to signal a downstream node that
> the upstream node is unable to retrieve a matching data. Since the actual NACK
> mechanism is still under active investigation, we do not include it in this
> version of specification, but may add it back in a future version".
> 
> 
> Best regards,
> Christian
> 
> 
> On 2015-02-06 18:09, Spyridon (Spyros) Mastorakis wrote:
>> Hello,
>> in ndnSIM 2.0, we use the NDN Forwarding Daemon (NFD). NFD does not
>> currently support NACKs as data packets. However, it is a feature
>> planned to be added in the future.
>> As soon as this feature is added in NFD, it is going to be supported
>> by ndnSIM as well.
>> --
>> Spyridon (Spyros) Mastorakis
>> Personal Website: http://cs.ucla.edu/~mastorakis/
>> Internet Research Laboratory
>> PhD Computer Science
>> UCLA
>>> On Feb 6, 2015, at 1:07 AM, Daniel Posch <poschdaniel2 at gmail.com> wrote:
>>> Hello,
>>> I am trying to port a forwarding strategy, which I have implemented in ndnSIM1.0 to ndnSIM2.0. I have looked through the documents and API specification, however, I don't understand if and how the concept of "NACKs" is supported in ndnSIM2.0. Can someone give me a hint how to implement the following in ndnSIM2.0:
>>> Assume a forwarding strategy decides to proactively discard an Interest message. What would be the best way to propagate this information to the requesting neighboring? In ndnSIM1.0 I have used the build-in NACK-response from the NACK-Strategy, which responds with a NACK-message once all faces have been set to "waiting in vain".
>>> Best regards,
>>> Daniel
>>> _______________________________________________
>>> ndnSIM mailing list
>>> ndnSIM at lists.cs.ucla.edu
>>> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
>> _______________________________________________
>> ndnSIM mailing list
>> ndnSIM at lists.cs.ucla.edu
>> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
> _______________________________________________
> ndnSIM mailing list
> ndnSIM at lists.cs.ucla.edu
> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim