[ns] VBR on TCP / Variable packet sizes in TCP

[Sugat Jain <sugat@cs.utexas.edu>]

Hi All,

	We need to do experiments where VBR traffic is sent out on a TCP
flow. Apparently in the default TCP Agent in ns, the packet size is always
fixed. What we need is to be able to read from a trace file containing the
varying packet sizes of a VBR flow, to determine the size of the next
packet to be sent on TCP flow.

	I would like to know if there is some support already built in to
provide this functionality. If not then if anyone added such support on
his own and is willing to share the code, or information about how it can
be added.

Thanks
Sugat