[ndnSIM] Segmentation fault

[Ygor Amaral]

Hi Sai,

This segmentation fault does not seem to be related with ns3/ndnSIM.

I think you made a basic programming error inside your for loop.

You have an index out of bounds error.

Regards,
Ygor Amaral

On Tue, Jun 8, 2021 at 1:52 AM sai gautams via ndnSIM <
ndnsim at lists.cs.ucla.edu> wrote:

> Hi all,
>
> I hope you are well.I'm new to ns-3 and ndnSIM and still familiarizing
> myself with the platform. In my ndnSIM I tried creating an on-off
> application by changing the frequencies in the consumerHelper. When I try
> building I get a segmentation fault. Can anyone please explain to me the
> fault I'm getting. I can post my code as well if anyone wants to find where
> exactly I'm going wrong.
>
> #include "ns3/core-module.h"
> #include "ns3/network-module.h"
> #include "ns3/point-to-point-module.h"
> #include "ns3/ndnSIM-module.h"
> #include "assert.h"
> namespace ns3 {
>
> int
> main(int argc, char* argv[])
> {
>   Config::SetDefault("ns3::PointToPointNetDevice::DataRate",
> StringValue("20Mbps"));
>   Config::SetDefault("ns3::PointToPointChannel::Delay",
> StringValue("5ms"));
>   Config::SetDefault("ns3::QueueBase::MaxSize", StringValue("50p"));
>
>   CommandLine cmd;
>   cmd.Parse(argc, argv);
>
>   NodeContainer nodes;
>   nodes.Create(5);
>   for (int i=0;i<5;i++)
>   {
>   PointToPointHelper p2p;
>   p2p.Install(nodes.Get(i),nodes.Get(i+1));
>   }
>   ndn::StackHelper ndnHelper;
>   ndnHelper.setPolicy("nfd::cs::lru");
>   ndnHelper.SetDefaultRoutes(true);
>   ndnHelper.setCsSize(50);
>   ndnHelper.InstallAll();
>
>   ndn::StrategyChoiceHelper::InstallAll("/prefix",
> "/localhost/nfd/startegy/best-route");
>
>   //ndn::GlobalRoutingHelper ndnGlobalRoutingHelper;
>   //ndnGlobalRoutingHelper.InstallAll();
>
>   // Consumer 1
>   ndn::AppHelper consumerHelper("ns3::ndn::ConsumerCbr");
>
>   consumerHelper.SetPrefix("/prefix");
>   consumerHelper.SetAttribute("Frequency", StringValue("100"));
>   auto Consumer1 = consumerHelper.Install(nodes.Get(0));
>
>   Consumer1.Start(Seconds(2));
>   Consumer1.Stop(Seconds(5));
>
>   //Consumer 2
>   consumerHelper.SetPrefix("/prefix");
>   consumerHelper.SetAttribute("Frequency", StringValue("150"));
>   auto Consumer2 = consumerHelper.Install(nodes.Get(1));
>
>   Consumer2.Start(Seconds(0));
>   Consumer2.Stop(Seconds(5));
>
>   //Consumer 3
>   consumerHelper.SetPrefix("/prefix");
>   consumerHelper.SetAttribute("Frequency", StringValue("150"));
>   auto Consumer3 = consumerHelper.Install(nodes.Get(2));
>
>   Consumer3.Start(Seconds(3));
>   Consumer3.Stop(Seconds(5));
>
>   //Producer
>   ndn::AppHelper producerHelper("ns3::ndn::Producer");
>   producerHelper.SetPrefix("/prefix");
>   producerHelper.SetAttribute("PayloadSize", StringValue("1024"));
>   producerHelper.Install(nodes.Get(5));
>
> //  ndn::GlobalRoutingHelper::CalculateRoutes();
>
>   Simulator::Stop(Seconds(10.0));
>
>   Simulator::Run();
>   Simulator::Destroy();
>
>   return 0;
> }
>
> } // namespace ns3
>
> int
> main(int argc, char* argv[])
> {
>   return ns3::main(argc, argv);
> }
>
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff7f555ba in ns3::Ptr<ns3::NetDevice>::Ptr
> (this=0xf800005555556b8f, o=...) at ./ns3/ptr.h:741
> 741  : m_ptr (PeekPointer (o))
>
>
> --
>
> *Sai Gautam Mandapati*
>
> Deakin University
>
> Doctor of Philosophy Student
>
> Higher Degree by Research
>
> Faculty of Science, Engineering and Built-in Environment
>
> E-mail: saigautam96 at gmail.com
>
> http://www.linkedin.com/in/sai-gautam-mandapati
> _______________________________________________
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> ndnSIM at lists.cs.ucla.edu
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>
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