[ns] TCP window in ns

[amrutha ravichandran]

Hi,
I have added a new field to the tcp header which im using in the receiver(
tcp-sink.cc) to dynamically advertise receiver window size..
i advertise 0 window size on all acknowledgements except the last one where
i advertise full window size(20)..
this value is set in the new field and sent along with the acknowledgement..
 at the sender(tcp.cc) i have received the acknowledgemnet..
i read the value of this field ..
i want to equate this value to the sender window which will send packets
according to the advertised value..
where do i find this??
which variable do i have to equate it to??
which variable is responsible for sending packets according to the receiver
window size??

Pls help its urgent..

Thanks,
Amrutha.