[ndnSIM] How to modify the contents of the Interest package？

[Spyridon (Spyros) Mastorakis]

True, one can change NDNLP tag info at each hop.

Of course ndnSIM has NDNLP :-)
We also have some example implementation here:

https://github.com/named-data-ndnSIM/NFD/commit/0a30676920b9d3f2b2c8bc68e583befc415210cc <https://github.com/named-data-ndnSIM/NFD/commit/0a30676920b9d3f2b2c8bc68e583befc415210cc>
https://github.com/named-data-ndnSIM/ndn-cxx/commit/d31b8ef523f4a5b152da88e3d5f47d5697d60772 <https://github.com/named-data-ndnSIM/ndn-cxx/commit/d31b8ef523f4a5b152da88e3d5f47d5697d60772>

Thanks,

Spyridon (Spyros) Mastorakis
Personal Website: http://cs.ucla.edu/~mastorakis/ <http://cs.ucla.edu/~mastorakis/>
Internet Research Laboratory
Computer Science Department
UCLA

> On Aug 8, 2018, at 8:53 PM, Lixia Zhang <lixia at cs.ucla.edu> wrote:
> 
> Ming, I dont know exactly what kind of info you wanted to modify or attach to an Interest packet, another option besides Spyros suggestion could be carrying your info in NDNLP-equivalent way.
> (forgive me: I do not know whether ndnSIM has NDNLP, Spyros does)
> 
>> On Aug 8, 2018, at 8:48 PM, Spyridon (Spyros) Mastorakis <mastorakis at cs.ucla.edu <mailto:mastorakis at cs.ucla.edu>> wrote:
>> 
>> Hi,
>> 
>>> On Aug 8, 2018, at 3:28 AM, Ming <mingdeyou at 126.com <mailto:mingdeyou at 126.com>> wrote:
>>> 
>>> Hello everyone,
>>>  I have a few questions  that needs you help!
>>> 1.    How to modify the  contents of the Interest package before the node forwards the Interest?Or can Interest packet be modified?
>>> ndnSIM 2.5 ‘s  API   uses  "const"  passing the Interest  pointer to each function.So I don't know how to do it.
>> 
>> There is a very good reason that all the methods in the forwarder class of NFD use const for Interests/Data packets. Because the forwarder is not supposed to change the packets at that point of the execution. I would suggest if you want to change Interests, create an application that could do that.
>> 
>>> 2.    A node how to sending  information to its neighbors?   In what form should I send this information?    Which class or function should I use?
>> 
>> Make sure that all the node's neighbors run a producer app that has registered a specific prefix. The node should run a consumer app to send Interests for the registered prefix. Please take a look at the existing consumer and producer app implementation in ndnSIM.
>> 
>> Hope that this helps,
>> 
>> Spyridon (Spyros) Mastorakis
>> Personal Website: http://cs.ucla.edu/~mastorakis/ <http://cs.ucla.edu/~mastorakis/>
>> Internet Research Laboratory
>> Computer Science Department
>> UCLA
>> 
>> 
>> 
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