Re: [ns] segmentation fault during simulation of AODV

["Joo-Han Song" <sjh1swj@orgio.net>]

Sorry I paste my tcl file again.

# wireless_test_3_1.tcl

# setting is based on the paper "performance comparison of on-demand routing
protocols for ad hoc networks"



# I used cbrgen.tcl and setdest for scenario.

# 1500X300 grids, 50 mobile nodes, 30 maximum connections, rate is 4, seed
is 1.0 during 900 second in ns2-1b8a.



# ======================================================================

# Define options

# ======================================================================



set val(chan)       Channel/WirelessChannel

set val(prop)       Propagation/TwoRayGround

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(x)              1500   ;# X dimension of the topography

set val(y)              300    ;# Y dimension of the topography

set val(ifqlen)         50     ;# max packet in ifq

set val(seed)           1.0

set val(adhocRouting)   AODV

set val(nn)             50     ;# how many nodes are simulated

set val(cp)             "../../indep-utils/cmu-scen-gen/cbr_test_50_30"

set val(sc)
"../../indep-utils/cmu-scen-gen/setdest/dest_test_50_30"

set val(stop)           900.0  ;# simulation time



# =====================================================================

# Main Program

# ======================================================================



#

# Initialize Global Variables

#



# create simulator instance

set ns_         [new Simulator]



# setup topography object

set topo        [new Topography]



# create trace object for ns and nam

set tracefd     [open simulation_3-1.tr w]

set namtrace    [open simulation_3-1.nam w]



# I added to use new-trace format

$ns_ use-newtrace



$ns_ trace-all $tracefd

$ns_ namtrace-all-wireless $namtrace $val(x) $val(y)



# define topology

$topo load_flatgrid $val(x) $val(y)



#

# Create God

#

set god_ [create-god $val(nn)]



#

# define how node should be created

#



#global node setting

$ns_ node-config -adhocRouting $val(adhocRouting) \

                 -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 OFF \

                 -macTrace OFF \

                 -movementTrace OFF



#

#  Create the specified number of nodes [$val(nn)] and "attach" them

#  to the channel.

#

for {set i 0} {$i < $val(nn) } {incr i} {

        set node_($i) [$ns_ node]

        $node_($i) random-motion 0               ;# disable random motion

}



#

# Define node movement model

#

puts "Loading connection pattern..."

source $val(cp)



#

# Define traffic model

#

puts "Loading scenario file..."

source $val(sc)



# Define node initial position in nam

for {set i 0} {$i < $val(nn)} {incr i} {



    # 50 defines the node size in nam, must adjust it according to your
scenario

    # The function must be called after mobility model is defined



    $ns_ initial_node_pos $node_($i) 50

}



#

# Tell nodes when the simulation ends

#

for {set i 0} {$i < $val(nn) } {incr i} {

    $ns_ at $val(stop).0 "$node_($i) reset";

}



$ns_ at  $val(stop).0001 "stop"

$ns_ at  $val(stop).0002 "puts \"NS EXITING...\" ; $ns_ halt"

proc stop {} {

    global ns_ tracefd

    $ns_ flush-trace

    close $tracefd

}



puts $tracefd "M 0.0 nn $val(nn) x $val(x) y $val(y) rp $val(adhocRouting)"

puts $tracefd "M 0.0 sc $val(sc) cp $val(cp) seed $val(seed)"

puts $tracefd "M 0.0 prop $val(prop) ant $val(ant)"



puts "Starting Simulation..."

$ns_ run


Thank you.

Joo-Han Song

----- Original Message -----
From: "Di-Fa Chang" 
To: "Joo-Han Song" 
Cc: 
Sent: Saturday, November 24, 2001 12:46 PM
Subject: Re: [ns] segmentation fault during simulation of AODV


> if you can post your simulation script, then other people may
> have the time to test it and find the bugs.
>
> thanks,
> difa
>
> On Thu, 22 Nov 2001, Joo-Han Song wrote:
>
> > Hi all users,
> >
> > I am having a confusing problem. I am doing a wireless simulation using
AODV that makes 'segmentation fault' error as the scenario comes to be
bigger. (In my case 1500 X 300 grids, 50 mobile nodes, 30 maximum
connections, rate is 4 duing 900 second simulation using allinone version
ns-2.1b8a).
> >
> > When I changed the routing mechanism to DSR in same scale scenario,
there was no problem like this. So I guess it might be the problem of AODV
source files in allinone version ns-2.1b8a
> > Is there anybody who having similar problems or solutions?
> > Also, which set of source files for AODV is the newest version and where
can I find them?
> >
> > I have already talked with Mr. Mahesh Marina about this problem, but he
said that because someone else has ported their code on his website to
ns-2.1b8a, he don't know the details.
> >
> > Any help will be appreciated lots.
> > Thank you.
> >
> > Joo-Han
> >
> >