[ndnSIM] Compilng error during the usage of "name.toUri()"

[ZHANG, Lu]

Hi Muhammad,

Thanks for your comment. I think we have to specify the PIT entry before we
can do a getPrefix().

Lu

2016-11-21 16:03 GMT+09:00 Muhammad Hosain Abdollahi Sabet <
mhasabet at gmail.com>:

> Actually "/prefix" is a prefix itself. Maybe it's better to getPrefix()
> first, then try to Find.
>
> Sabet
>
> خندان باشید
> با تشکر
>
> On Mon, Nov 21, 2016 at 10:20 AM, ZHANG, Lu <lu.zhang at fuji.waseda.jp>
> wrote:
>
>> Hi Guys,
>>
>> Thanks for your prompt answer. Yes, the Ptr<ndn::pit::Entry> entry =
>> pit->Find(ns3::ndn::Name("/prefix")); part returns a NULL since Find
>> uses a exact match, there is no exact "/prefix" in my PIT.
>>
>> Regards,
>>
>> Lu Zhang
>>
>> 2016-11-21 15:25 GMT+09:00 John Baugh <jpbaugh at umich.edu>:
>>
>>> Try checking if name is nullptr:
>>>
>>> ns3::ndn::Name name = entry-> GetPrefix();
>>>
>>> if(name != nullptr)
>>>   name.toUri();
>>> else
>>>   cout<<"ooops!"<<endl;
>>>
>>> On Nov 21, 2016 1:18 AM, "Alex Afanasyev" <aa at cs.ucla.edu> wrote:
>>>
>>>>
>>>> > On Nov 20, 2016, at 10:15 PM, ZHANG, Lu <lu.zhang at fuji.waseda.jp>
>>>> wrote:
>>>> >
>>>> > Hi all,
>>>> >
>>>> > I would like to print out the prefix name in PIT on to screen by
>>>> using the toUri() function in Name class. The topology is simple as below:
>>>> >
>>>> >
>>>> >  *      +----------+     10Mbps      +--------+     10Mbps
>>>> +----------+
>>>> >  *      | consumer | <------------> | router | <------------> |
>>>> producer |
>>>> >  *      +----------+         10ms      +--------+          10ms
>>>>  +----------+
>>>> >  *
>>>> >
>>>> >
>>>> > Part of my program is like below:
>>>> >
>>>> >   Ptr<ndn::Pit> pit = nodes.Get(1)->GetObject<ndn::Pit> ();
>>>> >   Ptr<ndn::pit::Entry> entry = pit->Find(ns3::ndn::Name("/prefix"));
>>>> >   ns3::ndn::Name name = entry-> GetPrefix();
>>>> >   name.toUri();
>>>> >
>>>> > When executing compile command ./waf --run 1 --vis I got below output:
>>>> >
>>>> > Command ['/home/11/ndnSIM/ns-3/build/scratch/1',
>>>> '--SimulatorImplementationType=ns3::VisualSimulatorImpl'] terminated
>>>> with signal SIGSEGV. Run it under a debugger to get more information (./waf
>>>> --run <program> --command-template="gdb --args %s <args>").
>>>> >
>>>> > Any one have clue on why this happens or how should I use the toUri()
>>>> function?
>>>>
>>>> You can check to run the scenario in the debugger using the suggested
>>>> command, but I would suspect that you're simply getting a segfault because
>>>> there is no "/prefix" entry in the PIT (Find returns NULL and then you're
>>>> dereferencing NULL).
>>>>
>>>> ---
>>>> Alex
>>>>
>>>>
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>>>> ndnSIM at lists.cs.ucla.edu
>>>> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
>>>>
>>>
>>
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>
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