[ns] how to execute the some tcl code from classifier.cc

[muralikrishna g]

hi to all...

here i have to execute some piece of code in tcl script, after satisfying a
condition in classifier.cc like as below

tcl script:

{*
*set udp0 [new Agent/UDP]
$ns attach-agent $n(24) $udp0

set cbr [new Application/Traffic/CBR]
$cbr attach-agent $udp0



set null0 [new Agent/Null]
$ns attach-agent $n(9) $null0
$ns connect $udp0 $null0

}


Classifier.cc:

void Classifier::recv(Packet* p, Handler*h)
{
 if( condition)
{if it enters the condition i have to start $ns "start cbr0" i cant say
time....}
}

how to do this please tell me in detail