[ns] CMUTrace::format

[James Mei <jingxia@ses.curtin.edu.au>]

What does the cmu-trace.cc
CMUTrace::format does ?

If I use exponential distributed function for traffic generation, it works 
fine. But when I used mine traffic generator which I used back the same 
header PT_EXP, it complains:

"(null) - invalid packet type (exp)"

Can anyone help me ?

Thanks