[ns] using AODV and Queue/DRR or Queue/Red will occur segmentation fault
-- Forwarded message --
From: howardgod howardgod [EMAIL PROTECTED]
Date: 2008/11/13
Subject: Segmentation fault in AODV when using DRR in wireless network
To: ns-users@isi.edu
Hi all!
I got a segmentation fault when using Queue/DRR and AODV in wireless
network.
following is the message output by valgrind
==2252== Invalid read of size 4
==2252==at 0x81BD274: PacketQueue::head() (queue.h:82)
==2252==by 0x829A1D6: PriQueue::filter(int) (priqueue.cc:158)
==2252==by 0x82C82FF: AODV::rt_ll_failed(Packet*) (aodv.cc:343)
==2252==by 0x82C8339: aodv_rt_failed_callback(Packet*, void*)
(aodv.cc:293)
==2252==by 0x827A041: Mac802_11::RetransmitRTS() (mac-802_11.cc:1295)
==2252==by 0x827A4C4: Mac802_11::send_timer() (mac-802_11.cc:883)
==2252==by 0x827A530: Mac802_11::sendHandler() (mac-802_11.cc:793)
==2252==by 0x82A142D: TxTimer::handle(Event*) (mac-timers.cc:254)
==2252==by 0x81A7933: Scheduler::dispatch(Event*, double)
(scheduler.cc:150)
==2252==by 0x81A7B85: Scheduler::run() (scheduler.cc:129)
==2252==by 0x81A7E44: Scheduler::command(int, char const* const*)
(scheduler.cc:198)
==2252==by 0x83CCAFD: TclClass::dispatch_cmd(void*, Tcl_Interp*, int,
char const**) (in /home/howardgod/ns2/ns-2.33/ns)
==2252== Address 0x1a is not stack'd, malloc'd or (recently) free'
I think the problem is in AODV::rt_ll_failed(Packet*)
and PriQueue::filter(int).
And there was a similar problem posed
http://mailman.isi.edu/pipermail/ns-users/2005-April/048686.html
and there's a solution about this problem
http://mailman.isi.edu/pipermail/ns-users/2005-April/048710.html
but solution is aimed at adding a new routing protocol. So the solutions is
not help for me.
I'm making a new queue based on DRR. And use it in wireless network. So when
I use Queue/MyQueue and AODV in TCL file, segmentation fault occurs. But I
make the problem easier. I write the same tcl file except I use Queue/DRR.
And I find out there's still a segmentation fault just as I use
Queue/MyQueue.
following is the TCL file
# =
# Define options
# =
set opt(chan) Channel/WirelessChannel
set opt(prop) Propagation/TwoRayGround
set opt(netif) Phy/WirelessPhy
set opt(mac) Mac/802_11
set opt(ifq) Queue/DRR
set opt(ll) LL
set opt(ant) Antenna/OmniAntenna
set opt(ifqLen) 50
set opt(nn) 7
set opt(rp) AODV
set opt(x) 1000
set opt(y) 1000
set opt(stop) 10
set opt(tran) 250
# =
# Create simulation object
set ns [new Simulator]
# Open trace file
set tracefd [open drr-out.tr w]
set namtrace [open drr-out.nam w]
$ns trace-all $tracefd
$ns namtrace-all-wireless $namtrace $opt(x) $opt(y)
# Create topology object
set topo [new Topography]
# Define topology
$topo load_flatgrid $opt(x) $opt(y)
# Create God
create-god $opt(nn)
set chan [new $opt(chan)]
# Congigure for node
$ns node-config -adhocRouting $opt(rp) \
-llType $opt(ll) \
-macType $opt(mac) \
-ifqType $opt(ifq) \
-ifqLen $opt(ifqLen) \
-antType $opt(ant) \
-propType $opt(prop) \
-phyType $opt(netif) \
-channel $chan \
-topoInstance $topo \
-agentTrace ON \
-routerTrace ON \
-macTrace OFF \
-movementTrace OFF
# =
# Node Definition
# =
for {set i 0} {$i 3} {incr i} {
set wl_node_($i) [$ns node]
$wl_node_($i) random-motion 0
puts wireless node $i created ...
$wl_node_($i) set X_ [expr 200.0 + $i * 200.0]
$wl_node_($i) set Y_ 400.0
$wl_node_($i) set Z_ 0.0
$ns initial_node_pos $wl_node_($i) 20
}
for {set i 3} {$i 5} {incr i} {
set wl_node_($i) [$ns node]
$wl_node_($i) random-motion 0
puts wireless node $i created ...;
$wl_node_($i) set X_ 400.0
$wl_node_($i) set Y_ [expr 800.0 - ($i - 3)*200.0]
$wl_node_($i) set Z_ 0.0
$ns initial_node_pos $wl_node_($i) 20
}
for {set i 5} {$i 7} {incr i} {
set wl_node_($i) [$ns node]
$wl_node_($i) random-motion 0
puts wireless node $i created ...;
$wl_node_($i) set X_ 400.0
$wl_node_($i) set Y_ [expr 200.0 - ($i - 5)*200.0]
$wl_node_($i) set Z_ 0.0
$ns initial_node_pos $wl_node_($i) 20
}
# =
# Traffic Definition
# =
set udp0 [new Agent/UDP]
set dst_udp0 [new Agent/Null]
$ns attach-agent $wl_node_(0) $udp0
$ns attach-agent $wl_node_(2) $dst_udp0
set cbr0 [new Application/Traffic/CBR]
$cbr0 set rate_ 200Kb
$cbr0 attach-agent $udp0
$ns connect $udp0 $dst_udp0
$ns at 0.0 $cbr0 start
$ns at $opt(stop) $cbr0 stop
set udp1 [new Agent/UDP]
set des_udp1 [new Agent/Null]
$ns attach-agent $wl_node_(4) $udp1
$ns attach-agent $wl_node_(5) $des_udp1
set cbr1 [new Application/Traffic/CBR]
$cbr1 set rate_ 500Kb
$cbr1 attach-agent $udp1
$ns connect $udp1 $des_udp1
$ns at 0.0 $cbr1 start
$ns at $opt(stop) $cbr1 stop
set udp2 [new Agent/UDP]
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[ns] Segmentation fault in AODV when using DRR in wireless network
Hi all!
I got a segmentation fault when using Queue/DRR and AODV in wireless
network.
following is the message output by valgrind
==2252== Invalid read of size 4
==2252==at 0x81BD274: PacketQueue::head() (queue.h:82)
==2252==by 0x829A1D6: PriQueue::filter(int) (priqueue.cc:158)
==2252==by 0x82C82FF: AODV::rt_ll_failed(Packet*) (aodv.cc:343)
==2252==by 0x82C8339: aodv_rt_failed_callback(Packet*, void*)
(aodv.cc:293)
==2252==by 0x827A041: Mac802_11::RetransmitRTS() (mac-802_11.cc:1295)
==2252==by 0x827A4C4: Mac802_11::send_timer() (mac-802_11.cc:883)
==2252==by 0x827A530: Mac802_11::sendHandler() (mac-802_11.cc:793)
==2252==by 0x82A142D: TxTimer::handle(Event*) (mac-timers.cc:254)
==2252==by 0x81A7933: Scheduler::dispatch(Event*, double)
(scheduler.cc:150)
==2252==by 0x81A7B85: Scheduler::run() (scheduler.cc:129)
==2252==by 0x81A7E44: Scheduler::command(int, char const* const*)
(scheduler.cc:198)
==2252==by 0x83CCAFD: TclClass::dispatch_cmd(void*, Tcl_Interp*, int,
char const**) (in /home/howardgod/ns2/ns-2.33/ns)
==2252== Address 0x1a is not stack'd, malloc'd or (recently) free'
I think the problem is in AODV::rt_ll_failed(Packet*)
and PriQueue::filter(int).
And there was a similar problem posed
http://mailman.isi.edu/pipermail/ns-users/2005-April/048686.html
and there's a solution about this problem
http://mailman.isi.edu/pipermail/ns-users/2005-April/048710.html
but solution is aimed at adding a new routing protocol. So the solutions is
not help for me.
I'm making a new queue based on DRR. And use it in wireless network. So when
I use Queue/MyQueue and AODV in TCL file, segmentation fault occurs. But I
make the problem easier. I write the same tcl file except I use Queue/DRR.
And I find out there's still a segmentation fault just as I use
Queue/MyQueue.
following is the TCL file
# =
# Define options
# =
set opt(chan) Channel/WirelessChannel
set opt(prop) Propagation/TwoRayGround
set opt(netif) Phy/WirelessPhy
set opt(mac) Mac/802_11
set opt(ifq) Queue/DRR
set opt(ll) LL
set opt(ant) Antenna/OmniAntenna
set opt(ifqLen) 50
set opt(nn) 7
set opt(rp) AODV
set opt(x) 1000
set opt(y) 1000
set opt(stop) 10
set opt(tran) 250
# =
# Create simulation object
set ns [new Simulator]
# Open trace file
set tracefd [open drr-out.tr w]
set namtrace [open drr-out.nam w]
$ns trace-all $tracefd
$ns namtrace-all-wireless $namtrace $opt(x) $opt(y)
# Create topology object
set topo [new Topography]
# Define topology
$topo load_flatgrid $opt(x) $opt(y)
# Create God
create-god $opt(nn)
set chan [new $opt(chan)]
# Congigure for node
$ns node-config -adhocRouting $opt(rp) \
-llType $opt(ll) \
-macType $opt(mac) \
-ifqType $opt(ifq) \
-ifqLen $opt(ifqLen) \
-antType $opt(ant) \
-propType $opt(prop) \
-phyType $opt(netif) \
-channel $chan \
-topoInstance $topo \
-agentTrace ON \
-routerTrace ON \
-macTrace OFF \
-movementTrace OFF
# =
# Node Definition
# =
for {set i 0} {$i 3} {incr i} {
set wl_node_($i) [$ns node]
$wl_node_($i) random-motion 0
puts wireless node $i created ...
$wl_node_($i) set X_ [expr 200.0 + $i * 200.0]
$wl_node_($i) set Y_ 400.0
$wl_node_($i) set Z_ 0.0
$ns initial_node_pos $wl_node_($i) 20
}
for {set i 3} {$i 5} {incr i} {
set wl_node_($i) [$ns node]
$wl_node_($i) random-motion 0
puts wireless node $i created ...;
$wl_node_($i) set X_ 400.0
$wl_node_($i) set Y_ [expr 800.0 - ($i - 3)*200.0]
$wl_node_($i) set Z_ 0.0
$ns initial_node_pos $wl_node_($i) 20
}
for {set i 5} {$i 7} {incr i} {
set wl_node_($i) [$ns node]
$wl_node_($i) random-motion 0
puts wireless node $i created ...;
$wl_node_($i) set X_ 400.0
$wl_node_($i) set Y_ [expr 200.0 - ($i - 5)*200.0]
$wl_node_($i) set Z_ 0.0
$ns initial_node_pos $wl_node_($i) 20
}
# =
# Traffic Definition
# =
set udp0 [new Agent/UDP]
set dst_udp0 [new Agent/Null]
$ns attach-agent $wl_node_(0) $udp0
$ns attach-agent $wl_node_(2) $dst_udp0
set cbr0 [new Application/Traffic/CBR]
$cbr0 set rate_ 200Kb
$cbr0 attach-agent $udp0
$ns connect $udp0 $dst_udp0
$ns at 0.0 $cbr0 start
$ns at $opt(stop) $cbr0 stop
set udp1 [new Agent/UDP]
set des_udp1 [new Agent/Null]
$ns attach-agent $wl_node_(4) $udp1
$ns attach-agent $wl_node_(5) $des_udp1
set cbr1 [new Application/Traffic/CBR]
$cbr1 set rate_ 500Kb
$cbr1 attach-agent $udp1
$ns connect $udp1 $des_udp1
$ns at 0.0 $cbr1 start
$ns at $opt(stop) $cbr1 stop
set udp2 [new Agent/UDP]
set des_udp2 [new Agent/Null]
$ns attach-agent $wl_node_(3) $udp2
$ns attach-agent $wl_node_(6) $des_udp2
set cbr2 [new Application/Traffic/CBR]
$cbr2 set rate_ 500Kb
$cbr2 attach-agent $udp2
$ns connect
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