[ndnSIM] Identifying an interface (face?)

Junxiao Shi shijunxiao at email.arizona.edu
Sun Nov 20 08:05:16 PST 2016

Hi John

I would say looking at the face scope attribute is a more reliable solution
than testing for the exact type:

switch (face->getScope()) {
  case ndn::nfd::FACE_SCOPE_LOCAL:
    // application
  case ndn::nfd::FACE_SCOPE_NON_LOCAL:
    // network

Yours, Junxiao

On Sat, Nov 19, 2016 at 11:46 PM, Alex Afanasyev <aa at cs.ucla.edu> wrote:
> I'd like to be able to determine how much and which data arrives on a
> particular interface.  I suppose I somehow need to obtain a FaceId, and
> somehow determine which Data arrives on that face?  Also, I need to be able
> to distinguish between Faces among applications and NFD, and between NFD
> and the "outside world" - i.e., which are ACTUALLY network interfaces.
> The answer depends on where you want to achieve this function.  If you're
> looking at the logs, the Face associated with the NetDevice identifies
> itself as netdev://[<mac-addr>]" (netdev prefix).  If you have a
> pointer/reference to the face and want to determine whether it is one to
> the outside world, you can use dynamic_cast:
> Face* face = ...;
> if (dynamic_cast<NetDeviceLinkService*>(face->getLinkService()) !=
> nullptr) {
>   // do stuff
> }
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