Segmentation fault with wireless simulation

[jayachandra gullapalli]

Hi,
 
I was trying an wireless simulation on NS, I encounter this segmentation fault. I tried to troubleshoot the code but with no success. Could you please correct if I have some problem with the code.
 
The code with which I tried the simulation.
 
#Define wirleess scenario parameters
 
set val(chan) Channel/WirelessChannel;
set val(prop) Propagation/TwoRayGround1;
set val(netif) Phy/WirelessPhy;
set val(mac) Mac/802_11;
set val(ifq) Queue/DropTail/PriQueue;
set val(ll) LL;
set val(ant) Antenna/OmniAntenna;
set val(ifqlen) 50;
set val(nn) 5;
set val(rp) DSR;
set val(x) 500;
set val(y) 400;
set val(stop) 150;
set ns [new Simulator]
set tracefd [open problem1Trace.tr w]
set windowVsTime2 [open problem1Win.tr w]
set namfd [open problem1Namtrace.nam w]
$ns trace-all $tracefd
$ns namtrace-all-wireless $namfd $val(x) $val(y)
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)
create-god $val(nn)
$ns node-config -adhocRouting $val(rp) \
-llType $val(ll) \
-macType $val(mac) \
-ifqType $val(ifq) \
-ifqLen $val(ifqlen) \
-antType $val(ant) \
-propType $val(prop) \
-phyType $val(netif) \
-channelType $val(chan) \
-topoInstance $topo \
-agentTrace ON \
-routerTrace ON\
-macTrace OFF \
-movementTrace ON
for {set i 0} {$i < $val(nn) } {incr i} {
set node_($i) [$ns node]
}
$node_(0) set X_ 5.0
$node_(0) set Y_ 5.0
$node_(0) set Z_ 0.0
$node_(1) set X_ 490.0
$node_(1) set Y_ 285.0
$node_(1) set Z_ 0.0
$node_(2) set X_ 150.0
$node_(2) set Y_ 240.0
$node_(2) set Z_ 0.0
$node_(3) set X_ 495.0
$node_(3) set Y_ 100
$node_(3) set Z_ 0.0
$node_(4) set X_ 495
$node_(4) set Y_ 395
$node_(4) set Z_ 0.0
 
$ns at 10.0 "$node_(0) setdest 250.0 250.0 3.0"
$ns at 15.0 "$node_(1) setdest 45.0 285.0 5.0"
$ns at 20.0 "$node_(2) setdest 480.0 300.0 5.0"
$ns at 25.0 "$node_(3) setdest 50.0 150.0 5.0"
$ns at 15.0 "$node_(4) setdest 50.0 50.0 3.0"
#set TCP Connection between node_(0) and node_(1)
set tcp0 [new Agent/TCP/Newreno]
$tcp0 set class_ 2
set sink0 [new Agent/TCPSink]
$ns attach-agent $node_(0) $tcp0
$ns attach-agent $node_(1) $sink0
$ns connect $tcp0 $sink0
set ftp [new Application/FTP]
$ftp attach-agent $tcp0
$ns at 10.0 "$ftp start"
#set TCP Connection between node_(0) and node_(4)
set tcp1 [new Agent/TCP/Newreno]
$tcp1 set class_ 2
set sink1 [new Agent/TCPSink]
$ns attach-agent $node_(0) $tcp1
$ns attach-agent $node_(4) $sink1
$ns connect $tcp1 $sink1
set ftp1 [new Application/FTP]
$ftp1 attach-agent $tcp1
$ns at 12.0 "$ftp1 start"
#set TCP Connection between node_(3) and node_(2)
set tcp2 [new Agent/TCP/Newreno]
$tcp2 set class_ 2
set sink2 [new Agent/TCPSink]
$ns attach-agent $node_(3) $tcp2
$ns attach-agent $node_(2) $sink2
$ns connect $tcp2 $sink2
set ftp2 [new Application/FTP]
$ftp2 attach-agent $tcp2
$ns at 15.0 "$ftp2 start"
proc plotWindow {tcpSource file} {
global ns
set time 0.01
set now [$ns now]
set cwnd [$tcpSource set cwnd_]
puts $file "$now $cwnd"
$ns at [expr $now+$time] "plotWindow $tcpSource $file" }
$ns at 10.1 "plotWindow $tcp0 $windowVsTime2"
#define node position in NAM
for {set i 0} {$i < $val(nn)} {incr i} {
$ns initial_node_pos $node_($i) 30
}
for {set i 0} {$i < $val(nn) } {incr i} {
$ns at $val(stop) "$node_($i) reset";
}
$ns at $val(stop) "$ns nam-end-wireless $val(stop)"
$ns at $val(stop) "stop"
$ns at 150.01 "puts \"end simulation\" ; $ns halt"
proc stop {} {
global ns tracefd namfd
$ns flush-trace
close $tracefd
close $namfd
}
$ns run
 
 
Your help in this regard would be greatly appreciated.
 
Thanks,
Jayachandra.


      Chat on a cool, new interface. No download required. Go to http://in.messenger.yahoo.com/webmessengerpromo.php

[Song Luo-2]

change the ifq to CMUPriQueue.

On Jan 7, 2008 7:06 PM, jayachandra gullapalli <jayachandra_5010@...>
wrote:

>
> Hi,
>
> I was trying an wireless simulation on NS, I encounter this segmentation
> fault. I tried to troubleshoot the code but with no success. Could you
> please correct if I have some problem with the code.
>
> The code with which I tried the simulation.
>
> #Define wirleess scenario parameters
>
> set val(chan) Channel/WirelessChannel;
> set val(prop) Propagation/TwoRayGround1;
> set val(netif) Phy/WirelessPhy;
> set val(mac) Mac/802_11;
> set val(ifq) Queue/DropTail/PriQueue;
> set val(ll) LL;
> set val(ant) Antenna/OmniAntenna;
> set val(ifqlen) 50;
> set val(nn) 5;
> set val(rp) DSR;
> set val(x) 500;
> set val(y) 400;
> set val(stop) 150;
> set ns [new Simulator]
> set tracefd [open problem1Trace.tr w]
> set windowVsTime2 [open problem1Win.tr w]
> set namfd [open problem1Namtrace.nam w]
> $ns trace-all $tracefd
> $ns namtrace-all-wireless $namfd $val(x) $val(y)
> set topo [new Topography]
> $topo load_flatgrid $val(x) $val(y)
> create-god $val(nn)
> $ns node-config -adhocRouting $val(rp) \
> -llType $val(ll) \
> -macType $val(mac) \
> -ifqType $val(ifq) \
> -ifqLen $val(ifqlen) \
> -antType $val(ant) \
> -propType $val(prop) \
> -phyType $val(netif) \
> -channelType $val(chan) \
> -topoInstance $topo \
> -agentTrace ON \
> -routerTrace ON\
> -macTrace OFF \
> -movementTrace ON
> for {set i 0} {$i < $val(nn) } {incr i} {
> set node_($i) [$ns node]
> }
> $node_(0) set X_ 5.0
> $node_(0) set Y_ 5.0
> $node_(0) set Z_ 0.0
> $node_(1) set X_ 490.0
> $node_(1) set Y_ 285.0
> $node_(1) set Z_ 0.0
> $node_(2) set X_ 150.0
> $node_(2) set Y_ 240.0
> $node_(2) set Z_ 0.0
> $node_(3) set X_ 495.0
> $node_(3) set Y_ 100
> $node_(3) set Z_ 0.0
> $node_(4) set X_ 495
> $node_(4) set Y_ 395
> $node_(4) set Z_ 0.0
>
> $ns at 10.0 "$node_(0) setdest 250.0 250.0 3.0"
> $ns at 15.0 "$node_(1) setdest 45.0 285.0 5.0"
> $ns at 20.0 "$node_(2) setdest 480.0 300.0 5.0"
> $ns at 25.0 "$node_(3) setdest 50.0 150.0 5.0"
> $ns at 15.0 "$node_(4) setdest 50.0 50.0 3.0"
> #set TCP Connection between node_(0) and node_(1)
> set tcp0 [new Agent/TCP/Newreno]
> $tcp0 set class_ 2
> set sink0 [new Agent/TCPSink]
> $ns attach-agent $node_(0) $tcp0
> $ns attach-agent $node_(1) $sink0
> $ns connect $tcp0 $sink0
> set ftp [new Application/FTP]
> $ftp attach-agent $tcp0
> $ns at 10.0 "$ftp start"
> #set TCP Connection between node_(0) and node_(4)
> set tcp1 [new Agent/TCP/Newreno]
> $tcp1 set class_ 2
> set sink1 [new Agent/TCPSink]
> $ns attach-agent $node_(0) $tcp1
> $ns attach-agent $node_(4) $sink1
> $ns connect $tcp1 $sink1
> set ftp1 [new Application/FTP]
> $ftp1 attach-agent $tcp1
> $ns at 12.0 "$ftp1 start"
> #set TCP Connection between node_(3) and node_(2)
> set tcp2 [new Agent/TCP/Newreno]
> $tcp2 set class_ 2
> set sink2 [new Agent/TCPSink]
> $ns attach-agent $node_(3) $tcp2
> $ns attach-agent $node_(2) $sink2
> $ns connect $tcp2 $sink2
> set ftp2 [new Application/FTP]
> $ftp2 attach-agent $tcp2
> $ns at 15.0 "$ftp2 start"
> proc plotWindow {tcpSource file} {
> global ns
> set time 0.01
> set now [$ns now]
> set cwnd [$tcpSource set cwnd_]
> puts $file "$now $cwnd"
> $ns at [expr $now+$time] "plotWindow $tcpSource $file" }
> $ns at 10.1 "plotWindow $tcp0 $windowVsTime2"
> #define node position in NAM
> for {set i 0} {$i < $val(nn)} {incr i} {
> $ns initial_node_pos $node_($i) 30
> }
> for {set i 0} {$i < $val(nn) } {incr i} {
> $ns at $val(stop) "$node_($i) reset";
> }
> $ns at $val(stop) "$ns nam-end-wireless $val(stop)"
> $ns at $val(stop) "stop"
> $ns at 150.01 "puts \"end simulation\" ; $ns halt"
> proc stop {} {
> global ns tracefd namfd
> $ns flush-trace
> close $tracefd
> close $namfd
> }
> $ns run
>
>
> Your help in this regard would be greatly appreciated.
>
> Thanks,
> Jayachandra.
>
>
>      Chat on a cool, new interface. No download required. Go to
> http://in.messenger.yahoo.com/webmessengerpromo.php
>

--
Song Luo
Intelligent Automation, Inc.

[khalil afzal]

Hi,
  Try to change queue type. Segmentation fault will remove.
  thanks.


KHALIL
 MS COMSATS

       
---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile.  Try it now.

[Hakim192009]

in your script you have to change ifq value Queue/DropTail/PriQueue by CMUPriQueue
#Define wirleess scenario parameters
 
set val(chan) Channel/WirelessChannel;
set val(prop) Propagation/TwoRayGround1;
set val(netif) Phy/WirelessPhy;
set val(mac) Mac/802_11;
set val(ifq) CMUPriQueue ;
set val(ll) LL;
set val(ant) Antenna/OmniAntenna;
set val(ifqlen) 50;
set val(nn) 5;
set val(rp) DSR;
set val(x) 500;
set val(y) 400;
set val(stop) 150;
set ns [new Simulator]
set tracefd [open problem1Trace.tr w]
set windowVsTime2 [open problem1Win.tr w]
set namfd [open problem1Namtrace.nam w]
$ns trace-all $tracefd
$ns namtrace-all-wireless $namfd $val(x) $val(y)
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)
create-god $val(nn)
$ns node-config -adhocRouting $val(rp) \
-llType $val(ll) \
-macType $val(mac) \
-ifqType $val(ifq) \
-ifqLen $val(ifqlen) \
-antType $val(ant) \
-propType $val(prop) \
-phyType $val(netif) \
-channelType $val(chan) \
-topoInstance $topo \
-agentTrace ON \
-routerTrace ON\
-macTrace OFF \
-movementTrace ON
for {set i 0} {$i < $val(nn) } {incr i} {
set node_($i) [$ns node]
}
$node_(0) set X_ 5.0
$node_(0) set Y_ 5.0
$node_(0) set Z_ 0.0
$node_(1) set X_ 490.0
$node_(1) set Y_ 285.0
$node_(1) set Z_ 0.0
$node_(2) set X_ 150.0
$node_(2) set Y_ 240.0
$node_(2) set Z_ 0.0
$node_(3) set X_ 495.0
$node_(3) set Y_ 100
$node_(3) set Z_ 0.0
$node_(4) set X_ 495
$node_(4) set Y_ 395
$node_(4) set Z_ 0.0
 
$ns at 10.0 "$node_(0) setdest 250.0 250.0 3.0"
$ns at 15.0 "$node_(1) setdest 45.0 285.0 5.0"
$ns at 20.0 "$node_(2) setdest 480.0 300.0 5.0"
$ns at 25.0 "$node_(3) setdest 50.0 150.0 5.0"
$ns at 15.0 "$node_(4) setdest 50.0 50.0 3.0"
#set TCP Connection between node_(0) and node_(1)
set tcp0 [new Agent/TCP/Newreno]
$tcp0 set class_ 2
set sink0 [new Agent/TCPSink]
$ns attach-agent $node_(0) $tcp0
$ns attach-agent $node_(1) $sink0
$ns connect $tcp0 $sink0
set ftp [new Application/FTP]
$ftp attach-agent $tcp0
$ns at 10.0 "$ftp start"
#set TCP Connection between node_(0) and node_(4)
set tcp1 [new Agent/TCP/Newreno]
$tcp1 set class_ 2
set sink1 [new Agent/TCPSink]
$ns attach-agent $node_(0) $tcp1
$ns attach-agent $node_(4) $sink1
$ns connect $tcp1 $sink1
set ftp1 [new Application/FTP]
$ftp1 attach-agent $tcp1
$ns at 12.0 "$ftp1 start"
#set TCP Connection between node_(3) and node_(2)
set tcp2 [new Agent/TCP/Newreno]
$tcp2 set class_ 2
set sink2 [new Agent/TCPSink]
$ns attach-agent $node_(3) $tcp2
$ns attach-agent $node_(2) $sink2
$ns connect $tcp2 $sink2
set ftp2 [new Application/FTP]
$ftp2 attach-agent $tcp2
$ns at 15.0 "$ftp2 start"
proc plotWindow {tcpSource file} {
global ns
set time 0.01
set now [$ns now]
set cwnd [$tcpSource set cwnd_]
puts $file "$now $cwnd"
$ns at [expr $now+$time] "plotWindow $tcpSource $file" }
$ns at 10.1 "plotWindow $tcp0 $windowVsTime2"
#define node position in NAM
for {set i 0} {$i < $val(nn)} {incr i} {
$ns initial_node_pos $node_($i) 30
}
for {set i 0} {$i < $val(nn) } {incr i} {
$ns at $val(stop) "$node_($i) reset";
}
$ns at $val(stop) "$ns nam-end-wireless $val(stop)"
$ns at $val(stop) "stop"
$ns at 150.01 "puts \"end simulation\" ; $ns halt"
proc stop {} {
global ns tracefd namfd
$ns flush-trace
close $tracefd
close $namfd
}
$ns run
  #Good Luck