[Ndn-interest] Data comes from another face?

Junxiao Shi shijunxiao at email.arizona.edu
Mon Jun 8 10:15:00 PDT 2015

Hi Nacho

Yes I'm aware of both issues.

Sabet's original question is asking whether a Data packet could be received
on a face where an Interest has not been forwarded to, under normal
situations. The question is not about whether such Data packet should be
Currently NFD forwarding would accept a Data packet as long as there is a
PIT entry, without considering whether an Interest has been forwarded to
the incoming face.
This behavior is inherited from ccnd 0.7.2, and I know there's a security

I also suspect there would forwarding problems where transmissions on a
multi-access link cannot reach every node.
But I'm unfamiliar with those links, so I can't say exactly what problem
could occur.

Yours, Junxiao

On Mon, Jun 8, 2015 at 9:55 AM, <Ignacio.Solis at parc.com> wrote:

>  Hi folks.
>  I wanted to bring up a couple of important points to this discussion
> that have not been mentioned.  Maybe people have already assimilated them
> so they think they’re obvious, but just in case:
>  1-  A node should not accept data packets over links/interfaces/faces
> over which it did not forward an interest.  This is a security risk.
>  2- NDN may have issues over multiple access links/interfaces/faces where
> not all nodes can hear each other (non-infrastructure WiFi).
>  Both of these are true in the basic case. It’s possible that with extra
> design, protocols or developments that I’m unaware of these can be
> mitigated/solved.
>  Nacho
>  --
>  Nacho (Ignacio) Solis
> Protocol Architect
> Principal Scientist
> Palo Alto Research Center (PARC)
> +1(650)812-4458
> Ignacio.Solis at parc.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.lists.cs.ucla.edu/pipermail/ndn-interest/attachments/20150608/c9362e6e/attachment.html>

More information about the Ndn-interest mailing list