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Hi all,
I attach the file I use for the simulation below..
In this file if I use tcp_(0) and ftp_(0) instead of tcp1 and ftp1 as in
the current file, the simulator will not start and complains that tcp_(0)
is not a valid variable..But, with the present script, the simulation runs
and produces the scr1-out.tr file but not the scr1_seq.tr(actually it
produces just a blank file)..I want to get a graph of the seq number sent
by the sender with time..Can someone please help about why the script
gives an error initially and after I change the variable names, it runs,
but does not produce any output for the sequence number traces...
Thanks.
Jeyandran
ps:The $val(cp) contains a file generated by setdest..
# ======================================================================
# 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) 1000 ;# X dimension of the topography
set val(y) 1000 ;# Y dimension of the topography
set val(ifqlen) 50 ;# max packet in ifq
set val(seed) 0.0
set val(adhocRouting) DSR
set val(nn) 50 ;# how many nodes are simulated
set val(cp) "mov_p1000_50"
set val(stop) 600.0 ;# 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 scr1-out.tr w]
set namtrace [open scr1-out.nam w]
set seqtrace [open scr1_seq.tr w]
$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
set chan_1_ [new $val(chan)]
$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) \
-topoInstance $topo \
-agentTrace ON \
-routerTrace OFF \
-macTrace OFF \
-channel $chan_1_
#
# Create the specified number of nodes [$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 $val(cp)
#
# Define traffic model
#
# 1 connecting to 50 at time 1.0
set tcp1 [$ns_ create-connection TCP $node_(0) TCPSink $node_(49) 0]
$tcp1 set window_ 32
$tcp1 set packetSize_ 512
set ftp1 [$tcp1 attach-source FTP]
$ns_ at 0.0 "record"
$ns_ at 1.0 "$ftp1 start"
# Define node initial position in nam
for {set i 0} {$i < $val(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 nodes when the simulation ends
#
for {set i 0} {$i < $val(nn) } {incr i} {
$ns_ at $val(stop).0 "$node_($i) reset";
}
puts $tracefd "M 0.0 nn $val(nn) x $val(x) y $val(y) rp $val(adhocRouting)"
puts $tracefd "M 0.0 cp $val(cp) seed $val(seed)"
puts $tracefd "M 0.0 prop $val(prop) ant $val(ant)"
$ns_ at $val(stop).1 "finish"
proc record {} {
global tcp1 seqtrace
set ns [Simulator instance]
set time 1.0
set curseqno [$tcp1 set maxseq_]
set now [$ns now]
puts $seqtrace "$now $curseqno"
$ns at [expr $now+$time] "record"
}
proc finish {} {
global ns_ tracefd namtrace seqtrace
$ns_ flush-trace
close $namtrace
close $tracefd
close $bwtrace
exec xgraph scr1_seq.tr -geometry 800x400 &
exit 0
}
puts "Starting Simulation..."
$ns_ run