[ndnSIM] Modifying Interest and Data packets

[John Scott]

Hi Spyros,
The title of the email is misleading, sorry. What I want to accomplish is the following:
At t=0s, Consumer node sends out an Interest with the prefix /name/segment_1. The application itself adds to the Interest /timestamp_1/some_other_field_1
At t=2s, the Consumer nodes sends out another Interest with the prefix /name/segment_2/timestamp_2/some_other_field_2
And so on.
The Producer node then interprets the Interest name, parses, and reply with the Data packet /name/segment_1/timestamp_3/some_other_field_3.
So a node can decide to drop a packet if (currentTime - timestamp_n) > threshold, for instance.

Can this be accomplish by modifying the Interest/Data packet in the ndn-cxx library or by using Interest filters and selectors?
Thank you




 

    On Tuesday, March 7, 2017 6:53 PM, Spyridon (Spyros) Mastorakis <mastorakis at cs.ucla.edu> wrote:
 

 Hi,
take a look at the ndn-cxx library used by ndnSIM:
https://github.com/named-data-ndnSIM/ndn-cxx
Modify the data and interest classes to add the fields that you want:
https://github.com/named-data-ndnSIM/ndn-cxx/blob/ndn-cxx-0.3.4-ndnSIM/src/data.cpphttps://github.com/named-data-ndnSIM/ndn-cxx/blob/ndn-cxx-0.3.4-ndnSIM/src/interest.cpp
Make sure that you also modify the way that you encode and decode an NDN packet to/from its wire format (methods wireEncode and wireDecode).
Hope that this helps,
Spyridon (Spyros) Mastorakis
Personal Website: http://cs.ucla.edu/~mastorakis/
Internet Research Laboratory
Computer Science Department
UCLA

On Mar 7, 2017, at 12:26 PM, John Scott <scott1091 at yahoo.com> wrote:
Hi,
I would like to add extra information in the Interest and Data packets so that intermediate nodes can make forwarding decisions; however, I did not find this option in the ndnSIM.Could you please point me to some references?
Thank you





   
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