[ns] Flow of execution (c++ and tcl)

[Saurabh Sinha]

Hi

I'm working on it for some days but can't actually get the flow of execution
in the code, like which
funtions(c++) are called likewise.

Suppose in simple-wireless.tcl, like from where does the code actually
starts, like i know is the "ns-lib.tcl"
calls some tcl files which initializes the simulator, like packet-header and
all. But after that from where does the c++ functions called.


Example :

I used ( from simple-wireless.tcl):

*************************************************************************************
set val(mac)            Mac/802_11

 $ns_ node-config -adhocRouting $val(rp) \
    -llType $val(ll) \
    -macType $val(mac) \
    .
    .


set tcp [new Agent/TCP]
$tcp set class_ 2
set sink [new Agent/TCPSink]
$ns_ attach-agent $node_(0) $tcp
$ns_ attach-agent $node_(1) $sink
$ns_ connect $tcp $sink
set ftp [new Application/FTP]
$ftp attach-agent $tcp
$ns_ at 10.0 "$ftp start"

#
# Tell nodes when the simulation ends
#
for {set i 0} {$i < $val(nn) } {incr i} {
    $ns_ at 150.0 "$node_($i) reset";
}
$ns_ at 150.0 "stop"
$ns_ at 150.01 "puts \"NS EXITING...\" ; $ns_ halt"
proc stop {} {
    global ns_ tracefd
    $ns_ flush-trace
    close $tracefd
}

puts "Starting Simulation..."
$ns_ run

*************************************************************************************
Now from where does the fuctions of say mac802_11.cc called, like recv(),
transmit() and all.



--
Saurabh Sinha
Department of Computer Science,
University of Delhi.