[ns] TCP's packet size does not vary with the FTP's packetsize.

[Mayur]

Dear all,

I am using simple FTP over TCP. In ns, from the application layer (ftp) 
Though I send small packets, (eg. 100 bytes using '$ftp_($i) send 100' 
), TCP's packet size remains fixed equal to 1000. What is the reason? 
How to change it.

I tried to study the tcp.cc's send and sendmsg() function, but could not 
understand it well.

Your cooperation is appreciated.

regards,
Mayur