[ndnSIM] How to get Node Id?

Alex Afanasyev aa at cs.fiu.edu
Thu Mar 15 10:10:23 PDT 2018

> On Mar 15, 2018, at 1:06 PM, Mudasir Qazi <mudasirqazi00 at gmail.com <mailto:mudasirqazi00 at gmail.com>> wrote:
> Hi,
> I am looking for the ID of a node in the network. I want to know which node has sent interest or data etc.
> I have found following way to get it in ndn-app-link-service.cpp class, and it works fine because this class has m_node private member.
> uint32_t nodeId = m_node->GetId(); //works fine in ndn-app-link-service.cpp
> But, the problem is, I also need to get Node ID in forwarder.cpp as well as on several other places in whole ndnSIM. I have tried following method to get it in forwarder.cpp but it does not work.
> //does not work in forwarder.cpp
> ns3::Ptr<ns3::Application> app = ns3::Ptr<ns3::Application>();
the above is pointless-- you're creating nullptr and then trying to dereference.

> ns3::Ptr<ns3::Node> node = app->GetNode();
> uint32_t nodeId = node->GetId();

You can use simulator context to get access to the node (same as in ndn-cxx/src/face.cpp on line 98):

ns3::Ptr<ns3::Node> node = ns3::NodeList::GetNode(ns3::Simulator::GetContext());


> Please guide me how can I get it in forwarder.cpp as well as give me a general method to get it wherever it is needed in whole ndnSIM for future purposes.
> --
> Regards,
> Mudasir Qazi
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Alex Afanasyev
Assistant Professor, SCIS, Florida International University
11200 SW 8th Street, ECS Room 261B, Miami, FL 33199
phone: +1.305.348.4960 (office); email: aa at cs.fiu.edu <mailto:aa at cs.fiu.edu>
web: https://users.cs.fiu.edu/~afanasyev/ <https://users.cs.fiu.edu/~afanasyev/>

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