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[ns] Segmentation fault-help needed urgently
Hi,every ns expert,
Sorry for disturbing every one.Recently I install ns-allinone-2.1b8a on
the platform of Linux red Hat version 7.0. I patch the snoop.cc and
vlan.tcl.After installation, I validate the ns2, all the test passed
excepting two warnings.Then I run the example come from the ns2 itself.
the script as follow,
=====================================================================
#
# wireless2.tcl
# simulation of a wired-cum-wireless scenario consisting of 2 wired nodes
# connected to a wireless domain through a base-station node.
# ======================================================================
# Define options
# ======================================================================
set opt(chan) Channel/WirelessChannel ;# channel type
set opt(prop) Propagation/TwoRayGround ;# radio-propagation
model
set opt(netif) Phy/WirelessPhy ;# network interface
type
set opt(mac) Mac/802_11 ;# MAC type
set opt(ifq) Queue/DropTail/PriQueue ;# interface queue type
set opt(ll) LL/LLSnoop ;# link layer type
#set opt(ll) LL
set opt(ant) Antenna/OmniAntenna ;# antenna model
set opt(ifqlen) 50 ;# max packet in ifq
set opt(nn) 3 ;# number of
mobilenodes
set opt(adhocRouting) DSDV ;# routing protocol
set opt(cp) "" ;# connection pattern
file
set
opt(sc) "../tcl/mobility/scene/scen-3-test" ;#
node movement file.
set opt(x) 670 ;# x coordinate of topology
set opt(y) 670 ;# y coordinate of topology
set opt(seed) 0.0 ;# seed for random number
gen.
set opt(stop) 250 ;# time to stop simulation
set opt(ftp1-start) 160.0
set opt(ftp2-start) 170.0
set num_wired_nodes 2
set num_bs_nodes 1
#
============================================================================
# check for boundary parameters and random seed
if { $opt(x) == 0 || $opt(y) == 0 } {
puts "No X-Y boundary values given for wireless topology\n"
}
if {$opt(seed) > 0} {
puts "Seeding Random number generator with $opt(seed)\n"
ns-random $opt(seed)
}
# create simulator instance
set ns_ [new Simulator]
# set up for hierarchical routing
$ns_ node-config -addressType hierarchical
AddrParams set domain_num_ 2 ;# number of domains
lappend cluster_num 2 1 ;# number of clusters in each
domain
AddrParams set cluster_num_ $cluster_num
lappend eilastlevel 1 1 4 ;# number of nodes in each cluster
AddrParams set nodes_num_ $eilastlevel ;# of each domain
set tracefd [open wireless2-out.tr w]
set namtrace [open wireless2-out.nam w]
$ns_ trace-all $tracefd
$ns_ namtrace-all-wireless $namtrace $opt(x) $opt(y)
# Create topography object
set topo [new Topography]
# define topology
$topo load_flatgrid $opt(x) $opt(y)
# create God
create-god $opt(nn)
#create wired nodes
set temp {0.0.0 0.1.0} ;# hierarchical addresses for wired domain
for {set i 0} {$i < $num_wired_nodes} {incr i} {
set W($i) [$ns_ node [lindex $temp $i]]
}
# configure for base-station node
$ns_ node-config -adhocRouting $opt(adhocRouting) \
-llType $opt(ll) \
-macType $opt(mac) \
-ifqType $opt(ifq) \
-ifqLen $opt(ifqlen) \
-antType $opt(ant) \
-propType $opt(prop) \
-phyType $opt(netif) \
-channelType $opt(chan) \
-topoInstance $topo \
-wiredRouting ON \
-agentTrace ON \
-routerTrace OFF \
-macTrace OFF
#create base-station node
set temp {1.0.0 1.0.1 1.0.2 1.0.3} ;# hier address to be used for
wireless
;# domain
set BS(0) [$ns_ node [lindex $temp 0]]
$BS(0) random-motion 0 ;# disable random motion
#provide some co-ord (fixed) to base station node
$BS(0) set X_ 1.0
$BS(0) set Y_ 2.0
$BS(0) set Z_ 0.0
# create mobilenodes in the same domain as BS(0)
# note the position and movement of mobilenodes is as defined
# in $opt(sc)
#configure for mobilenodes
$ns_ node-config -wiredRouting OFF
for {set j 0} {$j < $opt(nn)} {incr j} {
set node_($j) [ $ns_ node [lindex $temp \
[expr $j+1]] ]
$node_($j) base-station [AddrParams addr2id \
[$BS(0) node-addr]]
}
#create links between wired and BS nodes
$ns_ duplex-link $W(0) $W(1) 5Mb 2ms DropTail
$ns_ duplex-link $W(1) $BS(0) 5Mb 2ms DropTail
$ns_ duplex-link-op $W(0) $W(1) orient down
$ns_ duplex-link-op $W(1) $BS(0) orient left-down
# setup TCP connections
set tcp1 [new Agent/TCP]
$tcp1 set class_ 2
set sink1 [new Agent/TCPSink]
$ns_ attach-agent $node_(0) $tcp1
$ns_ attach-agent $W(0) $sink1
$ns_ connect $tcp1 $sink1
set ftp1 [new Application/FTP]
$ftp1 attach-agent $tcp1
$ns_ at $opt(ftp1-start) "$ftp1 start"
set tcp2 [new Agent/TCP]
$tcp2 set class_ 2
set sink2 [new Agent/TCPSink]
$ns_ attach-agent $W(1) $tcp2
$ns_ attach-agent $node_(2) $sink2
$ns_ connect $tcp2 $sink2
set ftp2 [new Application/FTP]
$ftp2 attach-agent $tcp2
$ns_ at $opt(ftp2-start) "$ftp2 start"
# source connection-pattern and node-movement scripts
if { $opt(cp) == "" } {
puts "*** NOTE: no connection pattern specified."
set opt(cp) "none"
} else {
puts "Loading connection pattern..."
source $opt(cp)
}
if { $opt(sc) == "" } {
puts "*** NOTE: no scenario file specified."
set opt(sc) "none"
} else {
puts "Loading scenario file..."
source $opt(sc)
puts "Load complete..."
}
# Define initial node position in nam
for {set i 0} {$i < $opt(nn)} {incr i} {
# 20 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) 20
}
# Tell all nodes when the simulation ends
for {set i } {$i < $opt(nn) } {incr i} {
$ns_ at $opt(stop).0 "$node_($i) reset";
}
$ns_ at $opt(stop).0 "$BS(0) reset";
$ns_ at $opt(stop).0002 "puts \"NS EXITING...\" ; $ns_ halt"
$ns_ at $opt(stop).0001 "stop"
proc stop {} {
global ns_ tracefd namtrace
# $ns_ flush-trace
close $tracefd
close $namtrace
}
# informative headers for CMUTracefile
puts $tracefd "M 0.0 nn $opt(nn) x $opt(x) y $opt(y) rp \
$opt(adhocRouting)"
puts $tracefd "M 0.0 sc $opt(sc) cp $opt(cp) seed $opt(seed)"
puts $tracefd "M 0.0 prop $opt(prop) ant $opt(ant)"
puts "Starting Simulation..."
$ns_ run
===============================================================================
AND I GOT SEGMENTATION FAULT AS FOLLOW,
==============================================================================
warning: Please use -channel as shown in tcl/ex/wireless-mitf.tcl
warning: no class variable Snoop::debug_
see tcl-object.tcl in tclcl for info about this warning.
warning: no class variable Snoop::debug_
see tcl-object.tcl in tclcl for info about this warning.
Segmentation fault(core dumped)
=============================================================================
How can I slove this problem? I need help from ns expert urgently.
Thank you very much in advance!
With best Regards.
Zheng Hu
Center for Wireless Communications
Department of Electrical & Computer Engineering
University of Waterloo
Waterloo,Ontario,Canada,N2L 3G1
Tel:(519) 888 4567 ext.3099(o)