[ns] How to add application data

[Pavan K Yogender]

Hello everyone,
I am trying to add application data in to udp packets so that I can encrypt
the data in the packets. I tried to add some data in to packets but it
gives me segementation fault. I created a new class , defined user data
their and tried to access data in the UDP agent class, but it does not seem
to accept that. Has anyone added some user/application data in to packets
earlier, if so please help me out in this aspect.

Thanks in advance,
Pavan