Re: [ns] Getting the sink of TCP connection

[Xuan Chen <xuanc@ISI.EDU>]

I think some web traffic related scripts have done such thing before. You
probably want to have a look at the scripts under ~/ns/tcl/webcache, say
webtraf.tcl. Hope it helps.

-chen xuan

On Wed, 6 Jun 2001, Nikolaos Katsarakis Austauschstud. (M. Schweigel) wrote:

> Thank you for your answer,
> 
> actually I had done this and it worked, but what I needed is to write a done() procedure for the TCP Agent, which will reset
> the Agent and its sink.
> 
> So I would like to be able to get the particular sink of each TCP agent, so that I don't have to write a done() procedure for
> every TCP Agent I create in my simulation. If that is not possible, then I guess I have to do it this way.
> 
> Bye
> 
> Nick
> 
> Xuan Chen wrote:
> 
> > Try this:
> >
> > set tcp [new Agent/TCP]
> > $tcp set class_ 2
> > set sink [new Agent/TCPSink]
> > $ns attach-agent $n0 $tcp
> > $ns attach-agent $n2 $sink
> > $ns connect $tcp $sink
> >
> > Thanks.
> > -chen xuan
> >
> > On Wed, 6 Jun 2001, Nikolaos Katsarakis Austauschstud. (M. Schweigel) wrote:
> >
> > > If I use the command:
> > >
> > > set tcp0 [$ns create-connection TCP $n0 TCPSink $n2 1]
> > >
> > > I only get the handle to the source agent.
> > >
> > > How can I afterwards get the handle to the sink agent?
> > >
> > > I tried set sink0 [$tpc0 target] but it didn't work.
> > >
> > > I tried to do $sink0 reset and got  the following error message:
> > >
> > > --- Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl) ---
> > >         _o12: no target for slot -1
> > >         _o12 type: Classifier/Hash/Dest
> > > content dump:
> > > classifier _o12
> > >         0 offset
> > >         0 shift
> > >         2147483647 mask
> > >         3 slots
> > >                 slot 0: _o61
> > >                 slot 1: _o22
> > >                 slot 2: _o22
> > >         -1 default
> > > ---------- Finished standard no-slot{} default handler ----------
> > >
> > > If anybody knows the right way to use the target command (or any other command to get the handle to the target of a given
> > > agent), please let me know.
> > >
> > > Thank you
> > >
> > > Nikos
> > >
> > >
> >
> > --
> > Xuan Chen
> > USC/ISI
> 

-- 
Xuan Chen
USC/ISI