test-suite-htcp.tcl

这个是目前国际上比较怪异的一种长距离高带宽环境下的拥塞控制算法

# Copyright (c) 1995 The Regents of the University of California.
# All rights reserved.
#
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# modification, are permitted provided that the following conditions
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# 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
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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#

source misc_simple.tcl

# Uncomment the line below to use a random seed for the
#  random number generator.
# ns-random 0

TestSuite instproc finish file {
        global quiet PERL
	$self instvar cwnd_chan_ testName_

        if { [info exists cwnd_chan_] } {
                $self plot_cwnd 1 $testName_ all.cwnd1
    		exec cp temp.cwnd temp.rands
        }
}

Class Topology

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


Class Topology/net2a -superclass Topology
Topology/net2a instproc init 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]

    $self next
    $ns duplex-link $node_(s1) $node_(r1) 40Mb 2ms DropTail
    $ns duplex-link $node_(s2) $node_(r1) 40Mb 2ms DropTail
    $ns duplex-link $node_(r1) $node_(r2) 20Mb 50ms DropTail 
    $ns queue-limit $node_(r1) $node_(r2) 50
    $ns queue-limit $node_(r2) $node_(r1) 50
    $ns duplex-link $node_(s3) $node_(r2) 40Mb 1ms DropTail
    $ns duplex-link $node_(s4) $node_(r2) 40Mb 1ms DropTail
}

############################################################

Class Test/tcp -superclass TestSuite
Test/tcp instproc init {} {
    $self instvar net_ test_ sender_ receiver_ guide_
    set net_    net2a
    set test_   tcp
    set guide_  "Sack TCP, bad queue."
    set sender_ TCP/Sack1
    set receiver_ TCPSink/Sack1
    $self next noTraceFiles
}
Test/tcp instproc run {} {
    global quiet
    $self instvar ns_ node_ testName_ dumpfile_ sender_ receiver_ guide_
    if {$quiet == "false"} {puts $guide_}
    $self setTopo
    Agent/TCP set window_ 512
    set stopTime  100.0
    set stopTime0 [expr $stopTime - 0.001]
    set stopTime2 [expr $stopTime + 0.001]

    set tcp1 \
     [$ns_ create-connection $sender_ $node_(s1) $receiver_ $node_(s3) 0]
    set ftp1 [$tcp1 attach-app FTP]
    $self enable_tracecwnd $ns_ $tcp1
    $ns_ at 0.0 "$ftp1 start"
    $ns_ at $stopTime0 "$ftp1 stop"

    set tcp2 \
     [$ns_ create-connection $sender_ $node_(s2) $receiver_ $node_(s4) 1]
    set ftp2 [$tcp2 attach-app FTP]
    $self enable_tracecwnd $ns_ $tcp2 all.cwnd1
    $ns_ at 40.0 "$ftp2 start"
    $ns_ at $stopTime0 "$ftp2 stop"

    $ns_ at $stopTime "$self cleanupAll $testName_" 
    $ns_ at $stopTime2 "exit 0"
    $ns_ run
}

Class Test/htcp -superclass TestSuite
Test/htcp instproc init {} {
    $self instvar net_ test_ sender_ receiver_ guide_
    set net_	net2a
    set test_	htcp
    set guide_	"HTCP, small queue."
    set sender_ TCP/Sack1
    set receiver_ TCPSink/Sack1 
    Agent/TCP set windowOption_ -10 
    Agent/TCP set max_ssthresh_ 1
    Test/htcp instproc run {} [Test/tcp info instbody run ]
    $self next noTraceFiles
}

TestSuite runTest