test-suite-tcp.tcl

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#
# Copyright (c) 1995 The Regents of the University of California.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#	This product includes software developed by the Computer Systems
#	Engineering Group at Lawrence Berkeley Laboratory.
# 4. Neither the name of the University nor of the Laboratory may be used
#    to endorse or promote products derived from this software without
#    specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/tcl/test/test-suite-tcp.tcl,v 1.22 1999/09/23 05:28:52 sfloyd Exp $
#
# To view a list of available tests to run with this script:
# ns test-suite-tcp.tcl
#

source misc.tcl
source topologies.tcl

TestSuite instproc finish file {
	global quiet PERL
        exec $PERL ../../bin/set_flow_id -s all.tr | \
          $PERL ../../bin/getrc -s 2 -d 3 | \
          $PERL ../../bin/raw2xg -s 0.01 -m 90 -t $file > temp.rands
	if {$quiet == "false"} {
		exec xgraph -bb -tk -nl -m -x time -y packets temp.rands &
	}
        ## now use default graphing tool to make a data file
	## if so desired
	## regsub \\(.+\\) $file {} filename
	## exec csh gnuplotA.com temp.rands $filename
        exit 0
}

TestSuite instproc printtimers { tcp time} {
	global quiet
	if {$quiet == "false"} {
        	puts "time: $time sRTT(in ticks): [$tcp set srtt_]/8 RTTvar(in ticks): [$tcp set rttvar_]/4 backoff: [$tcp set backoff_]"
	}
}

TestSuite instproc printtimersAll { tcp time interval } {
        $self instvar dump_inst_ ns_
        if ![info exists dump_inst_($tcp)] {
                set dump_inst_($tcp) 1
                $ns_ at $time "$self printtimersAll $tcp $time $interval"
                return
        }
	set newTime [expr [$ns_ now] + $interval]
	$ns_ at $time "$self printtimers $tcp $time"
        $ns_ at $newTime "$self printtimersAll $tcp $newTime $interval"
}

#
# Links1 uses 8Mb, 5ms feeders, and a 800Kb 10ms bottleneck.
# Queue-limit on bottleneck is 2 packets.
#
Class Topology/net4 -superclass NodeTopology/4nodes
Topology/net4 instproc init ns {
    $self next $ns
    $self instvar node_
    $ns duplex-link $node_(s1) $node_(r1) 8Mb 5ms DropTail
    $ns duplex-link $node_(s2) $node_(r1) 8Mb 5ms DropTail
    $ns duplex-link $node_(r1) $node_(k1) 800Kb 10ms DropTail
    $ns queue-limit $node_(r1) $node_(k1) 2
    $ns queue-limit $node_(k1) $node_(r1) 2
    if {[$class info instprocs config] != ""} {
	$self config $ns
    }
}

#
# Links1 uses 8Mb, 5ms feeders, and a 800Kb 20ms bottleneck.
# Queue-limit on bottleneck is 25 packets.
#
Class Topology/net6 -superclass NodeTopology/4nodes
Topology/net6 instproc init ns {
    $self next $ns
    $self instvar node_
    Queue/RED set setbit_ true
    $ns duplex-link $node_(s1) $node_(r1) 8Mb 5ms DropTail
    $ns duplex-link $node_(s2) $node_(r1) 8Mb 5ms DropTail
    $ns duplex-link $node_(r1) $node_(k1) 800Kb 20ms RED
    $ns queue-limit $node_(r1) $node_(k1) 25
    $ns queue-limit $node_(k1) $node_(r1) 25
    if {[$class info instprocs config] != ""} {
	$self config $ns
    }
}

# Definition of test-suite tests

# This test shows two TCPs when one is ECN-capable and the other
# is not.

Class Test/ecn -superclass TestSuite
Test/ecn instproc init topo {
	$self instvar net_ defNet_ test_
	set net_	$topo
	set defNet_	net6
	set test_	ecn_(one_with_ecn,_one_without)
	Agent/TCP set old_ecn_ 1
	$self next
}
Test/ecn instproc run {} {
	$self instvar ns_ node_ testName_

	# Set up TCP connection
	set tcp1 [$ns_ create-connection TCP $node_(s1) TCPSink $node_(k1) 0]
	$tcp1 set window_ 30
	$tcp1 set ecn_ 1
	set ftp1 [$tcp1 attach-app FTP]
	$ns_ at 0.0 "$ftp1 start"

	# Set up TCP connection
	set tcp2 [$ns_ create-connection TCP $node_(s2) TCPSink $node_(k1) 1]
	$tcp2 set window_ 20
	$tcp2 set ecn_ 0
	set ftp2 [$tcp2 attach-app FTP]
	$ns_ at 3.0 "$ftp2 start"

	$self tcpDump $tcp1 5.0
	$self tcpDump $tcp2 5.0

	$self traceQueues $node_(r1) [$self openTrace 10.0 $testName_]
	$ns_ run
}

# This test shows the retransmit timeout value when the first packet
# of a connection is dropped, and the backoff of the retransmit timer
# as subsequent packets are dropped.
#
# This test also shows that once the retransmit timer is backed off,
# it is later un-backed.

Class Test/timers -superclass TestSuite
Test/timers instproc init topo {
	$self instvar net_ defNet_ test_
	set net_	$topo
	set defNet_	net4
	set test_	timers_(first_packet_dropped)
	$self next
}
Test/timers instproc run {} {
	global quiet
	$self instvar ns_ node_ testName_

	if {$quiet == "false"} {puts "tcpTICK: [Agent/TCP set tcpTick_]"}

	# Set up TCP connection
	set tcp2 [$ns_ create-connection TCP $node_(s2) TCPSink $node_(k1) 0]
	$tcp2 set window_ 3
	set ftp2 [$tcp2 attach-app FTP]
	$ns_ at 0.09 "$ftp2 start"
	$ns_ at 1.0 "$self printtimersAll $tcp2 1.0 1.0" 

	# Set up TCP connection
	set tcp1 [$ns_ create-connection TCP $node_(s1) TCPSink $node_(k1) 1]
	$tcp1 set window_ 5
	set ftp1 [$tcp1 attach-app FTP]
	$ns_ at 0.0 "$ftp1 produce 800"
	$ns_ at 20.3 "$ftp1 producemore 5"
	$ns_ at 20.7 "$ftp1 producemore 5" 

	$self traceQueues $node_(r1) [$self openTrace 25.0 $testName_]
	$ns_ run
}

Class Test/timersA -superclass TestSuite
Test/timersA instproc init topo {
	$self instvar net_ defNet_ test_
	set net_	$topo
	set defNet_	net4
	set test_	timersA_(early_packet_dropped)
	$self next
}
#  This one is funny.  
#  No fast retransmit.
#  First retransmit timer expires, packet 2 is retransmitted.  Backoff 1.
#  Ack for 2 comes in.  Karns.  Backoff is still 2.  Send packet 5, set timer.
#  Send packet 6.
#  Ack for 5 comes in.  Reset timer, the reset backoff is 1. Send packet 7.
#  Retransmit timer expires.  Set backoff to 2, reset timer.
#  
Test/timersA instproc run {} {
	global quiet
	$self instvar ns_ node_ testName_

	if {$quiet == "false"} {puts "tcpTICK: [Agent/TCP set tcpTick_]"}

	# Set up TCP connection
	set tcp2 [$ns_ create-connection TCP $node_(s2) TCPSink $node_(k1) 0]
	$tcp2 set window_ 3
	set ftp2 [$tcp2 attach-app FTP]
	$ns_ at 0.07 "$ftp2 start"
	$ns_ at 0.1 "$self printtimersAll $tcp2 0.1 0.1" 

	# Set up TCP connection
	set tcp1 [$ns_ create-connection TCP $node_(s1) TCPSink $node_(k1) 1]
	$tcp1 set window_ 5
	set ftp1 [$tcp1 attach-app FTP]
	$ns_ at 0.0 "$ftp1 produce 1600"
	$ns_ at 25.3 "$ftp1 producemore 5"
	$ns_ at 25.7 "$ftp1 producemore 5" 
	$ns_ at 26.1 "$ftp1 producemore 5" 
	$ns_ at 26.5 "$ftp1 producemore 5" 
	$ns_ at 26.9 "$ftp1 producemore 5" 
	$ns_ at 28.8 "$ftp1 producemore 5" 

	$self traceQueues $node_(r1) [$self openTrace 3.5 $testName_]
	$ns_ run
}

# Multiply the mean deviation by 8 instead of by 4.
#
Class Test/timersA1 -superclass TestSuite
Test/timersA1 instproc init topo {
	$self instvar net_ defNet_ test_
	set net_	$topo
	set defNet_	net4
	set test_	timersA1_(multiple_of_8_instead_of_4)
	Agent/TCP set rttvar_exp_ 3
        Test/timersA1 instproc run {} [Test/timersA info instbody run ]
	$self next
}

# timestamps, and tcpTick more fine-grained.
#
Class Test/timersA2 -superclass TestSuite
Test/timersA2 instproc init topo {
	$self instvar net_ defNet_ test_
	set net_	$topo
	set defNet_	net4
	set test_	timersA2_(timestamps,_fine-grained_clock)
        Agent/TCP set timestamps_ true
	Agent/TCP set tcpTick_ 0.001
        Test/timersA2 instproc run {} [Test/timersA info instbody run ]
	$self next
}

# Update the smoothed round-trip with weight 1/16 instead of 1/8.
#
Class Test/timersA3 -superclass TestSuite
Test/timersA3 instproc init topo {
	$self instvar net_ defNet_ test_
	set net_	$topo
	set defNet_	net4
	set test_	timersA3_(weight_1/32_instead_of_1/8)
	Agent/TCP set timestamps_ true
	Agent/TCP set tcpTick_ 0.001
	Agent/TCP set T_SRTT_BITS 5
	Agent/TCP set T_RTTVAR_BITS 4
        Test/timersA3 instproc run {} [Test/timersA info instbody run ]
	$self next
}

Class Test/timers1 -superclass TestSuite
Test/timers1 instproc init topo {
        $self instvar net_ defNet_ test_
        set net_        $topo  
        set defNet_     net2
        set test_       timers1_(tcpTick_=default,0.1)
        $self next
}
Test/timers1 instproc run {} {
	global quiet
        $self instvar ns_ node_ testName_

	if {$quiet == "false"} {puts "tcpTICK: [Agent/TCP set tcpTick_]"}
        $ns_ queue-limit $node_(r1) $node_(r2) 29

        set tcp1 [$ns_ create-connection TCP/Reno $node_(s1) TCPSink/DelAck $node_(r2) 0]
#        set tcp1 [$ns_ create-connection TCP $node_(s1) TCPSink/DelAck $node_(r2) 1]
        $tcp1 set window_ 40
        set ftp1 [$tcp1 attach-app FTP]
        $ns_ at 0.0 "$ftp1 produce 180"
	$ns_ at 1.0 "$self printtimersAll $tcp1 1.0 1.0" 
	$self traceQueues $node_(r1) [$self openTrace 4.0 $testName_]
        $ns_ run
}

Class Test/timers2 -superclass TestSuite
Test/timers2 instproc init topo {
        $self instvar net_ defNet_ test_
        set net_        $topo  
        set defNet_     net2
        set test_       timers2_(tcpTick_=0.5)
        $self next
}

Test/timers2 instproc run {} {
	global quiet
        $self instvar ns_ node_ testName_

	set tick 0.5
	if {$quiet == "false"} {puts "tcpTICK: $tick"}
	Agent/TCP set tcpTick_ $tick 
        $ns_ queue-limit $node_(r1) $node_(r2) 29

        set tcp1 [$ns_ create-connection TCP/Reno $node_(s1) TCPSink/DelAck $node_(r2) 0]
        $tcp1 set window_ 40
        set ftp1 [$tcp1 attach-app FTP]
        $ns_ at 0.0 "$ftp1 produce 180"
	$ns_ at 1.0 "$self printtimersAll $tcp1 1.0 1.0" 
	$self traceQueues $node_(r1) [$self openTrace 4.0 $testName_]
        $ns_ run
}

Class Test/timers3 -superclass TestSuite
Test/timers3 instproc init topo {
        $self instvar net_ defNet_ test_
        set net_        $topo  
        set defNet_     net2
        set test_       timers3_(tcpTick_=0.001)
        $self next
}

Test/timers3 instproc run {} {
	global quiet
        $self instvar ns_ node_ testName_

	set tick 0.001
	if {$quiet == "false"} {puts "tcpTICK: $tick"}
	Agent/TCP set tcpTick_ $tick 
        $ns_ queue-limit $node_(r1) $node_(r2) 29

        set tcp1 [$ns_ create-connection TCP/Reno $node_(s1) TCPSink/DelAck $node_(r2) 0]
        $tcp1 set window_ 40
        set ftp1 [$tcp1 attach-app FTP]
        $ns_ at 0.0 "$ftp1 produce 180"
	$ns_ at 1.0 "$self printtimersAll $tcp1 1.0 1.0" 
	$self traceQueues $node_(r1) [$self openTrace 4.0 $testName_]
        $ns_ run
}

Class Test/timers4 -superclass TestSuite
Test/timers4 instproc init topo {
        $self instvar net_ defNet_ test_
        set net_        $topo  
        set defNet_     net2
        set test_       timers4_(tcpTick_=0.001)
        $self next
}

Test/timers4 instproc run {} {
	global quiet
        $self instvar ns_ node_ testName_

	set tick 0.001
	if {$quiet == "false"} {puts "tcpTICK: $tick"}
	Agent/TCP set tcpTick_ $tick 
        $ns_ queue-limit $node_(r1) $node_(r2) 29