test-suite-sack.tcl

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    $ns_ delay $node_(s1) $node_(r1) 3ms
    $ns_ delay $node_(r1) $node_(s1) 3ms

    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(k1) 0]
    $tcp1 set window_ 50
    $tcp1 set bugFix_ false

    set tcp2 [$ns_ create-connection TCP/Sack1 $node_(s2) TCPSink/Sack1 $node_(k1) 1]
    $tcp2 set window_ 50
    $tcp2 set bugFix_ false

    set ftp1 [$tcp1 attach-app FTP]
    set ftp2 [$tcp2 attach-app FTP]

    $ns_ at 1.0 "$ftp1 start"
    $ns_ at 1.75 "$ftp2 produce 100"

    $self tcpDump $tcp1 1.0

    # trace only the bottleneck link
    #$self traceQueues $node_(r1) [$self openTrace 6.0 $testName_]
    $ns_ at 6.0 "$self cleanupAll $testName_"
    $ns_ run
}

# shows a long recovery from sack.
Class Test/sackB2 -superclass TestSuite
Test/sackB2 instproc init {} {
    $self instvar net_ test_ guide_
    set net_	net0
    set test_	sackB2
    set guide_      "Guide: SACK TCP, a connection with a long recovery"
    Agent/TCP set windowInit_ 1
    $self next pktTraceFile
}
Test/sackB2 instproc run {} {
    $self instvar ns_ node_ testName_ guide_
    $self setTopo
    puts $guide_
    $ns_ queue-limit $node_(r1) $node_(k1) 9

    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(k1) 0]
    $tcp1 set window_ 50

    set tcp2 [$ns_ create-connection TCP/Sack1 $node_(s2) TCPSink/Sack1 $node_(k1) 1]
    $tcp2 set window_ 20

    set ftp1 [$tcp1 attach-app FTP]
    set ftp2 [$tcp2 attach-app FTP]

    $ns_ at 1.0 "$ftp1 start"
    $ns_ at 1.0 "$ftp2 start"

    $self tcpDump $tcp1 1.0

    # trace only the bottleneck link
    #$self traceQueues $node_(r1) [$self openTrace 8.0 $testName_]
    $ns_ at 8.0 "$self cleanupAll $testName_"
    $ns_ run
}

# two packets dropped
Class Test/sackB4 -superclass TestSuite
Test/sackB4 instproc init {} {
    $self instvar net_ test_ guide_
    set net_	net2
    set test_	sackB4
    set guide_      "Guide: SACK TCP, two packets dropped"
    $self next pktTraceFile
}
Test/sackB4 instproc run {} {
    $self instvar ns_ node_ testName_ guide_
    $self setTopo
    puts $guide_
    $ns_ queue-limit $node_(r1) $node_(r2) 29
    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(r2) 0]
    $tcp1 set window_ 40

    set ftp1 [$tcp1 attach-app FTP]
    $ns_ at 0.0 "$ftp1 start"

    $self tcpDump $tcp1 1.0

    # trace only the bottleneck link
    #$self traceQueues $node_(r1) [$self openTrace 2.0 $testName_]
    $ns_ at 2.0 "$self cleanupAll $testName_"
    $ns_ run
}

# two packets dropped
Class Test/sackB4a -superclass TestSuite
Test/sackB4a instproc init {} {
    $self instvar net_ test_ guide_
    set net_	net2
    set test_	sackB4a
    set guide_      "Guide: SACK TCP, two packets dropped, with maxburst"
    $self next pktTraceFile
}
Test/sackB4a instproc run {} {
    $self instvar ns_ node_ testName_ guide_
    $self setTopo
    puts $guide_
    $ns_ queue-limit $node_(r1) $node_(r2) 29
    Agent/TCP set maxburst_ 4
    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(r2) 0]
    $tcp1 set window_ 40

    set ftp1 [$tcp1 attach-app FTP]
    $ns_ at 0.0 "$ftp1 start"

    $self tcpDump $tcp1 1.0

    # trace only the bottleneck link
    #$self traceQueues $node_(r1) [$self openTrace 2.0 $testName_]
    $ns_ at 2.0 "$self cleanupAll $testName_"
    $ns_ run
}

# Incorrect estimated pipe value
# Four packets delayed, no packets dropped.
Class Test/FalsePipe -superclass TestSuite
Test/FalsePipe instproc init {} {
    $self instvar net_ test_ guide_
    set net_ net3
    set test_ FalsePipe
    set guide_      "Guide: SACK TCP, four packets delayed"
    $self next pktTraceFile
}

Test/FalsePipe instproc run {} {
    $self instvar ns_ node_ testName_ guide_
    $self setTopo
    puts $guide_
    $self June01defaults
    $ns_ eventtrace-all
    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(s3) 1]
    $tcp1 set window_ 8
    set ftp1 [$tcp1 attach-app FTP]
    $ns_ at 0.0 "$ftp1 start"
    $self tcpDump $tcp1 3.0

    #delay packet 7, 8, 9, 10
    $self drops4 true 0.1

    $ns_ at 3.0 "$self cleanupAll $testName_"
    $ns_ run
}

# Incorrect estimated pipe value
# One packet dropped, four packets delayed.
Class Test/FalsePipe1 -superclass TestSuite
Test/FalsePipe1 instproc init {} {
    $self instvar net_ test_ guide_
    set net_ net3
    set test_ FalsePipe1
    set guide_      "Guide: SACK TCP, one packet dropped and four packets delayed"
    $self next pktTraceFile
}

Test/FalsePipe1 instproc run {} {
    $self instvar ns_ node_ testName_ guide_
    $self setTopo
    puts $guide_
    $self June01defaults
    $ns_ eventtrace-all
    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(s3) 1]
    $tcp1 set window_ 20
    set ftp1 [$tcp1 attach-app FTP]
    $ns_ at 0.0 "$ftp1 start"
    $self tcpDump $tcp1 3.0

    #delay packet 7, 8, 9, 10
    $self drops4 true 0.5
    $self dropPkts [$ns_ link $node_(r1) $node_(r2)] 1 7

    $ns_ at 3.0 "$self cleanupAll $testName_"
    $ns_ run
}

Class Test/sack_dupacks -superclass TestSuite
Test/sack_dupacks instproc init {} {
    $self instvar net_ test_ guide_
    set net_	net4
    set test_	sack_dupacks
    set guide_      "Guide: SACK TCP, Fast Recovery with standard numdupacks"
    $self next pktTraceFile
}
Test/sack_dupacks instproc run {} {
    $self instvar ns_ node_ testName_ guide_
    $self setTopo
    puts $guide_

    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(k1) 0]
    $tcp1 set window_ 200
    set ftp1 [$tcp1 attach-app FTP]
    $ns_ at 0.1 "$ftp1 start"

    $self tcpDump $tcp1 1.0

    # trace only the bottleneck link
    $ns_ at 3.0 "$self cleanupAll $testName_"
    $ns_ run
}

# finite flow
# make sure that the last packets are fast retransmitted if lost
Class Test/sack_finiteflow -superclass TestSuite
Test/sack_finiteflow instproc init {} {
    $self instvar net_ test_ guide_
    set net_    net4
    set test_   sack_finiteflow
    set guide_      "Guide: SACK TCP, Fast Recovery with last packets in a finite flow"
    $self next pktTraceFile
}
Test/sack_finiteflow instproc run {} {
    $self instvar ns_ node_ testName_ guide_
    $self setTopo
    puts $guide_

    $ns_ duplex-link $node_(r1) $node_(k1) 100Mb 5ms DropTail
    $ns_ queue-limit $node_(r1) $node_(k1) 4
    $ns_ queue-limit $node_(k1) $node_(r1) 4

    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(r1) TCPSink/Sack1 $node_(k1) 0]
    $tcp1 set window_ 200
    set ftp1 [$tcp1 attach-app FTP]

    # send 21 packets only
    set bytesToSend [expr 21 * [ $tcp1 set packetSize_ ]  ]
    $ns_ at 0.01 "$ftp1 send $bytesToSend"

    $self tcpDump $tcp1 0.1

    # trace only the bottleneck link
    $ns_ at 3.0 "$self cleanupAll $testName_"
    $ns_ run
}

#
# Sack_dupacks1 tests "numdupacksFrac_", for increasing numdupacks
#   up to a specified fraction of the current congestion window.
#
Class Test/sack_dupacks1 -superclass TestSuite
Test/sack_dupacks1 instproc init {} {
    $self instvar net_ test_ guide_
    set net_	net4
    set test_	sack_dupacks1
    set guide_      "Guide: SACK TCP, Fast Recovery with modified numdupacks"
    Agent/TCP set numdupacksFrac_ 4
    Test/sack_dupacks1 instproc run {} [Test/sack_dupacks info instbody run] 
    $self next pktTraceFile
}

# delayed ack not implemented yet
#Class Test/delayedSack -superclass TestSuite
#Test/delayedSack instproc init {} {
#    $self instvar net_ test_ guide_
#    set net_    net0
#    set test_	delayedSack
#    set guide_      "simple"
#    $self next pktTraceFile
#}
#Test/delayedSack instproc run {} {
#     $self instvar ns_ node_ testName_ guide_
#     $self setTopo
#     puts $guide_
#     set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(k1) 0]
#     $tcp1 set window_ 50
# 
#     # lookup up the sink and set it's delay interval
#     [$node_(k1) agent [$tcp1 dst-port]] set interval 100ms
# 
#     set ftp1 [$tcp1 attach-app FTP]
#     $ns_ at 1.0 "$ftp1 start"
# 
#     $self tcpDump $tcp1 1.0
# 
#     # trace only the bottleneck link
#     #$self traceQueues $node_(r1) [$self openTrace 4.0 $testName_]
#     $ns_ run
# }

## segregation
#Class Test/phaseSack -superclass TestSuite
#Test/phaseSack instproc init {} {
#    $self instvar net_ test_ guide_
#    set net_	net0
#    set test_	phaseSack
#    set guide_      "simple"
#    $self next pktTraceFile
#}
#Test/phaseSack instproc run {} {
#    $self instvar ns_ node_ testName_ guide_
#    $self setTopo
#    puts $guide_
#
#    $ns_ delay $node_(s2) $node_(r1) 3ms
#    $ns_ delay $node_(r1) $node_(s2) 3ms
#    $ns_ queue-limit $node_(r1) $node_(k1) 16
#    $ns_ queue-limit $node_(k1) $node_(r1) 100
#
#    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(k1) 0]
#    $tcp1 set window_ 32
#
#    set tcp2 [$ns_ create-connection TCP/Sack1 $node_(s2) TCPSink/Sack1 $node_(k1) 1]
#    $tcp2 set window_ 32
#
#    set ftp1 [$tcp1 attach-app FTP]
#    set ftp2 [$tcp2 attach-app FTP]
#
#    $ns_ at 5.0 "$ftp1 start"
#    $ns_ at 1.0 "$ftp2 start"
#
#    $self tcpDump $tcp1 5.0
#
#    # trace only the bottleneck link
#    #$self traceQueues $node_(r1) [$self openTrace 25.0 $testName_]
#    $ns_ run
#}
#
## random overhead, but segregation remains 
#Class Test/phaseSack2 -superclass TestSuite
#Test/phaseSack2 instproc init {} {
#    $self instvar net_ test_ guide_
#    set net_	net0
#    set test_	phaseSack2
#    set guide_      "simple"
#    $self next pktTraceFile
#}
#Test/phaseSack2 instproc run {} {
#    $self instvar ns_ node_ testName_ guide_
#    $self setTopo
#    puts $guide_
#
#    $ns_ delay $node_(s2) $node_(r1) 3ms
#    $ns_ delay $node_(r1) $node_(s2) 3ms
#    $ns_ queue-limit $node_(r1) $node_(k1) 16
#    $ns_ queue-limit $node_(k1) $node_(r1) 100
#
#    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(k1) 0]
#    $tcp1 set window_ 32
#    $tcp1 set overhead_ 0.01
#
#    set tcp2 [$ns_ create-connection TCP/Sack1 $node_(s2) TCPSink/Sack1 $node_(k1) 1]
#    $tcp2 set window_ 32
#    $tcp2 set overhead_ 0.01
#    
#    set ftp1 [$tcp1 attach-app FTP]
#    set ftp2 [$tcp2 attach-app FTP]
#    
#    $ns_ at 5.0 "$ftp1 start"
#    $ns_ at 1.0 "$ftp2 start"
#    
#    $self tcpDump $tcp1 5.0
#    
#    # trace only the bottleneck link
#    #$self traceQueues $node_(r1) [$self openTrace 25.0 $testName_]
#    $ns_ run
#}
#
## no segregation, because of random overhead
#Class Test/phaseSack3 -superclass TestSuite
#Test/phaseSack3 instproc init {} {
#    $self instvar net_ test_ guide_
#    set net_	net0
#    set test_	phaseSack3
#    set guide_      "simple"
#    $self next pktTraceFile
#}
#Test/phaseSack3 instproc run {} {
#    $self instvar ns_ node_ testName_ guide_
#    $self setTopo
#    puts $guide_
#
#    $ns_ delay $node_(s2) $node_(r1) 9.5ms
#    $ns_ delay $node_(r1) $node_(s2) 9.5ms
#    $ns_ queue-limit $node_(r1) $node_(k1) 16
#    $ns_ queue-limit $node_(k1) $node_(r1) 100
#
#    set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(k1) 0]
#    $tcp1 set window_ 32
#    $tcp1 set overhead_ 0.01
#
#    set tcp2 [$ns_ create-connection TCP/Sack1 $node_(s2) TCPSink/Sack1 $node_(k1) 1]
#    $tcp2 set window_ 32
#    $tcp2 set overhead_ 0.01
#
#    set ftp1 [$tcp1 attach-app FTP]
#    set ftp2 [$tcp2 attach-app FTP]
#
#    $ns_ at 5.0 "$ftp1 start"
#    $ns_ at 1.0 "$ftp2 start"
#
#    $self tcpDump $tcp1 5.0
#
#    # trace only the bottleneck link
#    #$self traceQueues $node_(r1) [$self openTrace 25.0 $testName_]
#    $ns_ run
#}

#Class Test/timersSack -superclass TestSuite
#Test/timersSack instproc init {} {
#    $self instvar net_ test_ guide_
#    set net_	net0
#    set test_	timersSack
#    set guide_      "simple"
#    $self next pktTraceFile
#}
#Test/timersSack instproc run {} {
#     $self instvar ns_ node_ testName_ guide_
#     $self setTopo
#     puts $guide_
#     $ns_ queue-limit $node_(r1) $node_(k1) 2
#     $ns_ queue-limit $node_(k1) $node_(r1) 100
# 
#     set tcp1 [$ns_ create-connection TCP/Sack1 $node_(s1) TCPSink/Sack1 $node_(k1) 0]
#     $tcp1 set window_ 4
#     # lookup up the sink and set it's delay interval
#     [$node_(k1) agent [$tcp1 dst-port]] set interval 100ms
# 
#     set tcp2 [$ns_ create-connection TCP/Sack1 $node_(s2) TCPSink/Sack1 $node_(k1) 1]
#     $tcp2 set window_ 4
#     # lookup up the sink and set it's delay interval
#     [$node_(k1) agent [$tcp2 dst-port]] set interval 100ms
# 
#     set ftp1 [$tcp1 attach-app FTP]
#     set ftp2 [$tcp2 attach-app FTP]
# 
#     $ns_ at 1.0 "$ftp1 start"
#     $ns_ at 1.3225 "$ftp2 start"
# 
#     $self tcpDump $tcp1 5.0
# 
#     # trace only the bottleneck link
#     #$self traceQueues $node_(r1) [$self openTrace 10.0 $testName_]
#     $ns_ run
# }

TestSuite runTest