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set n0 [$ns node]
set n1 [$ns node]
$ns at 0.0 "$n0 label Sender"
$ns at 0.0 "$n1 label Receiver"
set nf [open A1-stop-n-wait.nam w]
$ns namtrace-all $nf
set f [open A1-stop-n-wait.tr w]
$ns trace-all $f
$ns duplex-link $n0 $n1 0.2Mb 200ms DropTail
$ns duplex-link-op $n0 $n1 orient right
$ns queue-limit $n0 $n1 10
Agent/TCP set nam_tracevar_ true
set tcp [new Agent/TCP]
$tcp set window_ 1
$tcp set maxcwnd_ 1
$ns attach-agent $n0 $tcp
set sink [new Agent/TCPSink]
$ns attach-agent $n1 $sink
$ns connect $tcp $sink
set ftp [new Application/FTP]
$ftp attach-agent $tcp
$ns add-agent-trace $tcp tcp
$ns monitor-agent-trace $tcp
$tcp tracevar cwnd_
$ns at 0.1 "$ftp start"
$ns at 3.0 "$ns detach-agent $n0 $tcp ; $ns detach-agent $n1 $sink"
$ns at 3.5 "finish"
$ns at 0.0 "$ns trace-annotate "Stop and Wait with normal operation""
$ns at 0.05 "$ns trace-annotate "FTP starts at 0.1""
$ns at 0.11 "$ns trace-annotate "Send Packet_0""
$ns at 0.35 "$ns trace-annotate "Receive Ack_0""
$ns at 0.56 "$ns trace-annotate "Send Packet_1""
$ns at 0.79 "$ns trace-annotate "Receive Ack_1""
$ns at 0.99 "$ns trace-annotate "Send Packet_2""
$ns at 1.23 "$ns trace-annotate "Receive Ack_2 ""
$ns at 1.43 "$ns trace-annotate "Send Packet_3""
$ns at 1.67 "$ns trace-annotate "Receive Ack_3""
$ns at 1.88 "$ns trace-annotate "Send Packet_4""
$ns at 2.11 "$ns trace-annotate "Receive Ack_4""
$ns at 2.32 "$ns trace-annotate "Send Packet_5""
$ns at 2.55 "$ns trace-annotate "Receive Ack_5 ""
$ns at 2.75 "$ns trace-annotate "Send Packet_6""
$ns at 2.99 "$ns trace-annotate "Receive Ack_6""
$ns at 3.1 "$ns trace-annotate "FTP stops""
proc finish {} {
global ns nf
$ns flush-trace
close $nf
puts "filtering..."
exec tclsh ../ns-allinone-2.1b5/nam-1.0a7/bin/namfilter.tcl A1-stop-n-wait.nam
puts "running nam..."
exec nam A1-stop-n-wait.nam &
exit 0
}
$ns run
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