test-suite-ecn-ack.tcl

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#
# Copyright (c) 1995-1997 The Regents of the University of California.
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#	This product includes software developed by the Computer Systems
#	Engineering Group at Lawrence Berkeley Laboratory.
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# @(#) $Header: /cvsroot/nsnam/ns-2/tcl/test/test-suite-ecn-ack.tcl,v 1.26 2006/07/23 20:46:02 sallyfloyd Exp $
#
# To run all tests: test-all-ecn-ack
set dir [pwd]
catch "cd tcl/test"
catch "cd $dir"
source misc_simple.tcl
remove-all-packet-headers       ; # removes all except common
add-packet-header Flags IP TCP RTP ; # hdrs reqd for validation test
 
# FOR UPDATING GLOBAL DEFAULTS:

set flowfile fairflow.tr; # file where flow data is written
set flowgraphfile fairflow.xgr; # file given to graph tool 

Trace set show_tcphdr_ 1

set wrap 90
set wrap1 [expr 90 * 512 + 40]

Class Topology
    
Topology instproc node? num {
    $self instvar node_
    return $node_($num)
}

Topology instproc makenodes ns {
    $self instvar node_
    set node_(s1) [$ns node]
    set node_(s2) [$ns node]
    set node_(r1) [$ns node]
    set node_(r2) [$ns node]
    set node_(s3) [$ns node]
    set node_(s4) [$ns node]
}

Topology instproc createlinks ns {
    $self instvar node_
    $ns duplex-link $node_(s1) $node_(r1) 10Mb 2ms DropTail
    $ns duplex-link $node_(s2) $node_(r1) 10Mb 3ms DropTail
    $ns duplex-link $node_(r1) $node_(r2) 1.5Mb 20ms RED
    $ns queue-limit $node_(r1) $node_(r2) 25
    $ns queue-limit $node_(r2) $node_(r1) 25
    $ns duplex-link $node_(s3) $node_(r2) 10Mb 4ms DropTail
    $ns duplex-link $node_(s4) $node_(r2) 10Mb 5ms DropTail
}

Class Topology/net2 -superclass Topology
Topology/net2 instproc init ns {
    $self instvar node_
    $self makenodes $ns
    $self createlinks $ns
}

Class Topology/net2-lossy -superclass Topology
Topology/net2-lossy instproc init ns {
    $self instvar node_
    $self makenodes $ns
    $self createlinks $ns

    $self instvar lossylink_
    set lossylink_ [$ns link $node_(r1) $node_(r2)]
    set em [new ErrorModule Fid]
    set errmodel [new ErrorModel/Periodic]
    $errmodel unit pkt
    $lossylink_ errormodule $em
    $em insert $errmodel
    $em bind $errmodel 0
    $em default pass
}

Class Topology/net2A-lossy -superclass Topology
Topology/net2A-lossy instproc init ns {
    $self instvar node_
    $self makenodes $ns
    $self createlinks $ns

    $self instvar lossylink_
    set lossylink_ [$ns link $node_(r2) $node_(r1)]
    set em [new ErrorModule Fid]
    set errmodel [new ErrorModel/Periodic]
    $errmodel unit pkt
    $lossylink_ errormodule $em
    $em insert $errmodel
    $em bind $errmodel 0
    $em default pass
}

TestSuite instproc finish file {
	global quiet wrap wrap1 PERL
	$self instvar ns_ tchan_ testName_ cwnd_chan_
	if {$file == "ecn_ack_fulltcp"} { 
	   ## tracing forward-path data packets
           exec $PERL ../../bin/getrc -s 2 -d 3 all.tr | \
	     $PERL ../../bin/raw2xg -aecx -s 0.01 -m $wrap -t $file > temp.rands
  	   exec $PERL ../../bin/getrc -s 3 -d 2 all.tr | \
	     $PERL ../../bin/raw2xg -aefcx -s 0.01 -m $wrap -t $file > temp1.rands
	} elseif {$wrap == $wrap1} {
	   ## tracing reverse-path data packets
           exec $PERL ../../bin/getrc -s 2 -d 3 all.tr | \
	     $PERL ../../bin/raw2xg -aefcx -s 0.01 -m $wrap -t $file > temp.rands
  	   exec $PERL ../../bin/getrc -s 3 -d 2 all.tr | \
	     $PERL ../../bin/raw2xg -aecx -s 0.01 -m $wrap -t $file > temp1.rands
	} else {
           exec $PERL ../../bin/getrc -s 2 -d 3 all.tr | \
	     $PERL ../../bin/raw2xg -aecx -s 0.01 -m $wrap -t $file > temp.rands
  	   exec $PERL ../../bin/getrc -s 3 -d 2 all.tr | \
	     $PERL ../../bin/raw2xg -aecx -s 0.01 -m $wrap -t $file > temp1.rands
	}
	if {$quiet == "false"} {
        	exec xgraph -bb -tk -nl -m -x time -y packets temp.rands \
                     temp1.rands &
	}
        ## now use default graphing tool to make a data file
        ## if so desired
        if { [info exists cwnd_chan_] && $quiet == "false" } {
                $self plot_cwnd
        }
        if { [info exists tchan_] && $quiet == "false" } {
                $self plotQueue $testName_
        }
	# exec csh gnuplotC2.com temp.rands temp1.rands $file eps
	$ns_ halt
}

TestSuite instproc plotQueue file {   
        global quiet
        $self instvar tchan_
        #
        # Plot the queue size and average queue size, for RED gateways.
        #
        set awkCode {
                {
                        if ($1 == "Q" && NF>2) {
                                print $2, $3 >> "temp.q";
                                set end $2
                        }
                        else if ($1 == "a" && NF>2)
                                print $2, $3 >> "temp.a";
                }
        }
        set f [open temp.queue w]
        puts $f "TitleText: $file"
        puts $f "Device: Postscript"
         
        if { [info exists tchan_] } {
                close $tchan_
        }
        exec rm -f temp.q temp.a
        exec touch temp.a temp.q  
        
        exec awk $awkCode all.q  
        
        puts $f \"queue 
        exec cat temp.q >@ $f
        puts $f \n\"ave_queue
        exec cat temp.a >@ $f
        ###puts $f \n"thresh
        ###puts $f 0 [[ns link $r1 $r2] get thresh]
        ###puts $f $end [[ns link $r1 $r2] get thresh]
        close $f
        if {$quiet == "false"} {
                exec xgraph -bb -tk -x time -y queue temp.queue &
        }
}

TestSuite instproc tcpDumpAll { tcpSrc interval label } {
    global quiet
    $self instvar dump_inst_ ns_
    if ![info exists dump_inst_($tcpSrc)] {
	set dump_inst_($tcpSrc) 1
	set report $label/window=[$tcpSrc set window_]/packetSize=[$tcpSrc set packetSize_]
	if {$quiet == "false"} {
		puts $report
	}
	$ns_ at 0.0 "$self tcpDumpAll $tcpSrc $interval $label"
	return
    }
    $ns_ at [expr [$ns_ now] + $interval] "$self tcpDumpAll $tcpSrc $interval $label"
    set report time=[$ns_ now]/class=$label/ack=[$tcpSrc set ack_]/packets_resent=[$tcpSrc set nrexmitpack_]
    if {$quiet == "false"} {
    	puts $report
    }
}       

TestSuite instproc emod {} {
	$self instvar topo_
	$topo_ instvar lossylink_
        set errmodule [$lossylink_ errormodule]
	return $errmodule
}

TestSuite instproc setloss {} {
	$self instvar topo_
	$topo_ instvar lossylink_
        set errmodule [$lossylink_ errormodule]
        set errmodel [$errmodule errormodels]
        if { [llength $errmodel] > 1 } {
                puts "droppedfin: confused by >1 err models..abort"
                exit 1
        }
	return $errmodel
}

TestSuite instproc ecnsetup { tcptype { tcp1fid 0 } } {
    $self instvar ns_ node_ testName_ net_
    global wrap wrap1

    set delay 10ms
    $ns_ delay $node_(r1) $node_(r2) $delay
    $ns_ delay $node_(r2) $node_(r1) $delay

    set stoptime 2.0
    set redq [[$ns_ link $node_(r1) $node_(r2)] queue]
    $redq set setbit_ true
    $redq set limit_ 50

    set fid 1
    if {$tcptype == "Tahoe"} {
      set tcp1 [$ns_ create-connection TCP $node_(s1) \
	  TCPSink $node_(s3) $tcp1fid]
    } elseif {$tcptype == "Sack1"} {
      set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) \
	  TCPSink/Sack1  $node_(s3) $tcp1fid]
    } elseif {$tcptype == "FullTcpSack1"} {
          set wrap $wrap1
          set tcp1 [new Agent/TCP/FullTcp/Sack]
          set sink [new Agent/TCP/FullTcp/Sack]
          $ns_ attach-agent $node_(s1) $tcp1
          $ns_ attach-agent $node_(s3) $sink
          $tcp1 set fid_ $fid
          $sink set fid_ $fid
          $ns_ connect $tcp1 $sink
          # set up TCP-level connections
          $sink listen ; # will figure out who its peer is
	  $sink set window_ 35
	  $sink set ecn_ 1
    } else {
      set tcp1 [$ns_ create-connection TCP/$tcptype $node_(s1) \
	  TCPSink $node_(s3) $tcp1fid]
    }
    $tcp1 set window_ 35
    $tcp1 set ecn_ 1
    set ftp1 [$tcp1 attach-app FTP]
    $self enable_tracecwnd $ns_ $tcp1
        
    $ns_ at 0.0 "$ftp1 start"
        
    $self tcpDump $tcp1 5.0
        
    # trace only the bottleneck link
    ##$self traceQueues $node_(r1) [$self openTrace $stoptime $testName_]
    $ns_ at $stoptime "$self cleanupAll $testName_"
}

# Drop the specified packet.
TestSuite instproc drop_pkt { number } {
    $self instvar ns_ lossmodel
    set lossmodel [$self setloss]
    $lossmodel set offset_ $number
    $lossmodel set period_ 10000
}

# Mark the specified packet.
TestSuite instproc mark_pkt { number } {
    $self instvar ns_ lossmodel
    set lossmodel [$self setloss]
    $lossmodel set offset_ $number
    $lossmodel set period_ 10000
    $lossmodel set markecn_ true
}

TestSuite instproc drop_pkts pkts {
    $self instvar ns_
    set emod [$self emod]
    set errmodel1 [new ErrorModel/List]
    $errmodel1 droplist $pkts
    $emod insert $errmodel1
    $emod bind $errmodel1 1
}

#######################################################################
# SACK Test #
#######################################################################

Class Test/ecn_ack -superclass TestSuite
Test/ecn_ack instproc init {} {
        $self instvar net_ test_
        Queue/RED set setbit_ true
        set net_	net2-lossy
	Agent/TCP set bugFix_ true
        set test_	ecn_ack
        $self next
}
Test/ecn_ack instproc run {} {
	$self instvar ns_
	$self setTopo
	$self ecnsetup Sack1
	$self drop_pkt 20000
	$ns_ run
}