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# -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
#
# Copyright (c) 2000 International Computer Science Institute
# 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 ACIRI, the AT&T
# Center for Internet Research at ICSI (the International Computer
# Science Institute).
# 4. Neither the name of ACIRI nor of ICSI may be used
# to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY ICSI 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 ICSI 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: /cvsroot/nsnam/ns-2/tcl/lib/ns-pushback.tcl,v 1.5 2001/01/20 20:48:38 ratul Exp $
Node instproc add-pushback-agent {} {
$self instvar pushback_
set pushback_ [new Agent/Pushback]
[Simulator instance] attach-agent $self $pushback_
# puts "Pushback Agent = $pushback_"
$pushback_ initialize $self [[Simulator instance] get-routelogic]
return $pushback_
}
Node instproc get-pushback-agent {} {
$self instvar pushback_
if [info exists pushback_] {
return $pushback_
} else {
return -1
}
}
Simulator instproc pushback-duplex-link {n1 n2 bw delay} {
$self pushback-simplex-link $n1 $n2 $bw $delay
$self pushback-simplex-link $n2 $n1 $bw $delay
}
Simulator instproc pushback-simplex-link {n1 n2 bw delay} {
set pba [$n1 get-pushback-agent]
if {$pba == -1} {
puts "Node does not have a pushback agent"
exit
}
$self simplex-link $n1 $n2 $bw $delay RED/Pushback $pba
set link [$self link $n1 $n2]
set qmon [new QueueMonitor/ED]
$link attach-monitors [new SnoopQueue/In] [new SnoopQueue/Out] [new SnoopQueue/Drop] $qmon
set queue [$link queue]
$queue set pushbackID_ [$pba add-queue $queue]
$queue set-monitor $qmon
$queue set-src-dst [$n1 set id_] [$n2 set id_]
}
Agent/Pushback instproc get-pba-port {nodeid} {
set node [[Simulator instance] set Node_($nodeid)]
set pba [$node get-pushback-agent]
if {$pba == -1} {
return -1
} else {
return [$pba set agent_port_]
}
}
Agent/Pushback instproc check-queue { src dst qToCheck } {
set link [[Simulator instance] set link_($src:$dst)]
set queue [$link queue]
if {$qToCheck == $queue} {
return 1
} else {
return 0
}
}
Queue/RED/Pushback set pushbackID_ -1
Queue/RED/Pushback set rate_limiting_ 1
Agent/Pushback set last_index_ 0
Agent/Pushback set intResult_ -1
Agent/Pushback set enable_pushback_ 1
Agent/Pushback set verbose_ false
#
# Added to be able to trace the drops in rate-limiter
#
Queue/RED/Pushback instproc attach-traces {src dst file {op ""}} {
$self next $src $dst $file $op
set ns [Simulator instance]
#set this up late if you want.
# set type [$self mon-trace-type]
#nam does not understand anything else yet
# if {$op == "nam"} {
# set type "Drop"
# }
set type "Drop"
set rldrop_trace [$ns create-trace $type $file $src $dst $op]
set oldTrace [$self rldrop-trace]
if {$oldTrace!=0} {
puts "exists"
$rldrop_trace target $oldTrace
} else {
# puts "Does not exist"
$rldrop_trace target [$ns set nullAgent_]
}
$self rldrop-trace $rldrop_trace
}
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