[ndnSIM] [EXT] Packets Processing on Consumer
Puming Fang
pfang at umass.edu
Sat Apr 24 18:20:02 PDT 2021
Hi Junxiao,
Thanks for your reply.
To guarantee that the Interest “/b" can reach Node 3, I changed the forwarding strategy to broadcast (custom strategy).
Interesting thing happens. Node 1 starts to accept Data “/b" from Node 3.
In this experiment the Interest “/a/b” is forwarded to the application in Node 3, and the application responds with Data “/b”, then Data “/b” is forwarded to node 1 that requests “/b”.
Is that what’s happening in the experiment?
Thank you,
Puming
> On Apr 24, 2021, at 6:18 PM, Junxiao Shi <shijunxiao at email.arizona.edu> wrote:
>
> Hi Puming
>
> Node1 does not have a route for the /b prefix, so that the Interest is dropped right there without leaving Node1.
>
> Even if the Interest somehow reached Node3, the forwarder on that node would not accept the Data from the application face, because the Interest was never forwarded to the application.
> See https://www.lists.cs.ucla.edu/pipermail/ndn-interest/2018-April/002147.html <https://www.lists.cs.ucla.edu/pipermail/ndn-interest/2018-April/002147.html> for rationale.
>
> Yours, Junxiao
>
> On Sat, Apr 24, 2021 at 5:53 PM Puming Fang <pfang at umass.edu <mailto:pfang at umass.edu>> wrote:
> External Email
>
> Dear NDN team,
>
>
>
> My name is Puming Fang. I am a newbie to ndnSIM, and have introduced myself to ndnSIM by implementing a few interesting experiments.
>
>
>
> Here is one of them and I am very curious about why this happened.
>
>
>
> Node1
>
> |
>
> Node 0---Node2---Node3
>
>
>
> Node 0 sends out Interest “/a/b” to request Data.
> Node 1 sends out Interest “/b” to request Data.
> Node 3 is initialized with a producer of “/a/b”, but I made a slight change on Node 3 in producing Data: When Node 3 receives the Interest “/a/b”, it removes “/a” from “/a/b” and then responds with Data “/b”.
> Below is how node 3 removes “/a” from “/a/b” in Function Producer::OnInterest.
>
> ---------------------------------------------------------------
>
> App::OnInterest(interest); // tracing inside
>
>
>
> if (!m_active)
>
> return;
>
>
> Name dataName(interest->getName());
>
> dataName.erase(0);
>
> ------------------------------------------------------------------
>
>
>
> Obviously Node 0 didn’t receive the requested Data from Node 3. The interesting thing is that Node 1 didn’t receive Data “/b” from Node 3 either. Can anyone please explain to me why this happened?
>
>
>
> Your help would be greatly appreciated.
>
>
>
> Thanks,
>
> Puming
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.lists.cs.ucla.edu/pipermail/ndnsim/attachments/20210424/1836ff6f/attachment.html>
More information about the ndnSIM
mailing list