[ns] Assignment of flowid

["Antonello" <digioia.m@tin.it>]

Hi all,
I'm writing a C code to extract some information from trace file (especially
per-packet queueing delay). I want to separate this information on the basis
of their flow_id.
1. How can I assign a flow_id to a flow?
2. Anyone knows a simpler way to calculate per-packet delay? Someone
suggested me to use AWK but I don't know very well it, and I think it would
be necessary a complex script to do this.

Thanks in advance,
@ntonello