[ndnSIM] Access to the queue inside OnData() in forwarding-strategy

[Alex Afanasyev]

For Limits to be activated, you needs to use to forwarding strategy that uses them, e.g., ndn::fw::BestRoute::PerOutFaceLimits.

And just in case.  Limits class doesn't use anything from the transmission queues.  It needs to be manually configured with the parameters that make sense for the simulation scenario.

---
Alex

> On Feb 27, 2016, at 1:02 AM, Ayush Agarwal <ayush0071 at gmail.com> wrote:
> 
> Hi Alex,
> I am trying to change the interest limit/interest sending rate on a face. For this I am calling the functions inside the Limits class associated to a particular face. But I am unable to find any change in my simulation results. Can you guide me where I am going wrong.
> 
> Thanks & Regards,
> Ayush Agarwal
> Reseach Scholar, Computer Science
> National Institute of Technology, Karnataka
> Surathkal, India
> 
> On Fri, Feb 26, 2016 at 4:16 PM, Ayush Agarwal <ayush0071 at gmail.com <mailto:ayush0071 at gmail.com>> wrote:
> Hi,
> Thanks for your reply. Yes, I have solved the compilation errors. It was due to the NULL pointer that was not handled properly.
> 
> Thanks & Regards,
> Ayush
> 
> On Fri, Feb 26, 2016 at 2:26 PM, Alex Afanasyev <aa at cs.ucla.edu <mailto:aa at cs.ucla.edu>> wrote:
> 
> > On Feb 18, 2016, at 8:42 AM, Ayush Agarwal <ayush0071 at gmail.com <mailto:ayush0071 at gmail.com>> wrote:
> >
> > Hello everyone,
> >
> > I am using the following code to get hold of the queue object inside the forwarding strategy, OnData(....) function.
> >
> > Ptr<NetDeviceFace> netDeviceFace = DynamicCast<NetDeviceFace> (inFace);
> > if (netDeviceFace == NULL) {  }
> > Ptr<NetDevice> nd = netDeviceFace->GetNetDevice ();
> > if (nd == NULL) {  }
> > PointerValue txQueueAttribute;
> > nd->GetAttribute ("TxQueue", txQueueAttribute);
> > Ptr<ns3::Queue> txQueue = txQueueAttribute.Get<ns3::Queue> ();
> > if (txQueue == 0) {    }
> >
> > But I am getting a segmentation fault SIGSEV error while fetching the NetDevice object and the following errors for accessing queue.
> >
> > ../src/ndnSIM/model/fw/ndn-forwarding-strategy.cc:238:3: error: ‘PointerValue’ was not declared in this scope
> >     PointerValue txQueueAttribute;
> >    ^
> > ../src/ndnSIM/model/fw/ndn-forwarding-strategy.cc:239:32: error: ‘txQueueAttribute’ was not declared in this scope
> >    nd->GetAttribute ("TxQueue", txQueueAttribute);
> >                                 ^
> > ../src/ndnSIM/model/fw/ndn-forwarding-strategy.cc:243:50: error: expected primary-expression before ‘>’ token
> >    Ptr<Queue> txQueue = txQueueAttribute.Get<Queue> ();
> >                                                   ^
> > ../src/ndnSIM/model/fw/ndn-forwarding-strategy.cc:243:53: error: expected primary-expression before ‘)’ token
> >    Ptr<Queue> txQueue = txQueueAttribute.Get<Queue> ();
> >
> >
> > Can you please point me out where I am going wrong.
> 
> Hi Ayush,
> 
> Sorry for the delayed response.  I'm guessing that you have already solved the compilation problem?  Just in case, it is just a matter of adding proper includes (I think <ns3/pointer.h>, <ns3/queue.h>)
> 
> ---
> Alex
> 
> 
> 

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