[ns] Packet size

[Sridharan K Iyer <siyer@cs.tamu.edu>]

Hi,

  If I set the packetSize_ for a TCP packet to, say, 1000 bytes, I am
actually specifying the *data* to be 1000 bytes.  What I expect is that a
TCP header of 40 bytes must be added to this when the packet is passed
down.  And further, this extra header size *must* have an effect on the
tx-time of the packet.  But, when I observe the traces, I do not see
the header overhead.

  Am I missing something here?  Where is the header size appended to the
packet in the code?

__Sridhar__