[ns] About TCP's RTT parameter

["Xiang" <ns@cdnet.edu.cn>]

hi all,

I want to ask you some question about TCP flow's RTT parameter:

1. how to set RTT parameter of a tcp flow?

2. if I want to set a varing RTT parameter (for example, from 20ms to

   100ms), how can I do this?

3. how to get RTT parameter of a TCP flow in my c++ program?

Thanks in advance.

Xiang