[Ns-developers] bug in tcp.cc?

[Andrés Arcia]

Greetings,

I think there is a bug in the initialization of the slow start  
threshold for TCP (at tcp.cc). If you simply try this code you'll  
reproduce it:

$ ns-2.30
% set ns [new Simulator]
_o4
% Agent/TCP/FullTcp set ssthresh_ 1000
1000
% set save [new Agent/TCP/FullTcp]
_o11
% $save set ssthresh_
20

The problem may be at the TcpAgent::reset() method in:

ssthresh_ = int(wnd_);

Since each variable have a TCL bind, the direct setting of ssthresh_  
does not represent a problem and then it is silently overwritten in  
reset() at the instantiation of a TcpAgent.

Thanks,

--
Andrés Arcia