Re: [ns] How do you recognize the last packet?

[Alefiya Hussain <alefiyah@catarina.usc.edu>]

When TCP completes sending the packets it invokes a Tcl procedure called 
"done"

you may want to record the time in "done". The ns manual talks a little
about it.

alefiya


On Wed, 16 May 2001, Jahan Hassan wrote:

> Hi All,
> In my simulation, I'm using Agent TCP, and application FTP.
> FTP has 'produce n' command that sets the counter of packets to be sent
> to n.
> 
> So, if I have TCP packet size = 1000 and if I use 'produce 100'
> for FTP, that should give me 1000*100 bytes of transmission, right?
> 
> What I'd like to do is measure how much time it took for the
> transmission (ie, the file transfer delay).
> I was thinking of taking the ts_ of the first packet
> (where the seqno_ ==0), then take the $now for WHEN the
> last packet is received (in the tcpsink). Now, HOW can I
> detect the last packet ?
> Any clues/ideas?
> 
> You see what I'm trying to do, do you have any solution for this?
> Thanks in advance for your help.
> 
> Regards,
> Jahan.
> 
>