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

[Ayush Agarwal]

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> wrote:

>
> > On Feb 18, 2016, at 8:42 AM, Ayush Agarwal <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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