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

[Lixia Zhang]

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> 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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