# ======================================================================
# Define options
# ======================================================================
set val(chan)         Channel/WirelessChannel  ;# channel type
set val(prop)         Propagation/TwoRayGround ;# radio-propagation model
set val(ant)          Antenna/OmniAntenna      ;# Antenna type
set val(ll)           LL                       ;# Link layer type
set val(ifq)          Queue/DropTail/PriQueue  ;# Interface queue type
set val(ifqlen)       50                       ;# max packet in ifq
set val(netif)        Phy/WirelessPhy          ;# network interface type
set val(mac)          Mac/802_11               ;# MAC type
set val(rp)           DSDV                     ;# ad-hoc routing protocol  
set val(nn)           5                        ;# number of mobilenodes


# Create simulator
set ns_    [new Simulator]

# Set up trace file
$ns_ use-newtrace
set tracefd [open simple.tr w]
$ns_ trace-all $tracefd

# Create the "general operations director"
# Used internally by MAC layer: must create!
create-god $val(nn)


# Create and configure topography (used for mobile scenarios)
set topo [new Topography]
# 1000x1000m terrain
$topo load_flatgrid 1000 1000

$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) \
        -channel [new $val(chan)] \
        -topoInstance $topo \
        -agentTrace ON \
        -routerTrace ON \
        -macTrace OFF \
        -movementTrace OFF

for {set i 0} {$i < $val(nn) } {incr i} {
        set node_($i) [$ns_ node]       
        $node_($i) random-motion 0              ;# disable random motion
        $node_($i) set Y_ 0.0
        $node_($i) set Z_ 0.0
}

$node_(0) set X_ 0.0
$node_(1) set X_ 200.0
$node_(2) set X_ 400.0
$node_(3) set X_ 600.0
$node_(4) set X_ 800.0


# 1500 - 20 byte IP header - 40 byte TCP header = 1440 bytes
Agent/TCP set packetSize_ 1440 ;# This size EXCLUDES the TCP header

set agent [new Agent/TCP]
set app [new Application/FTP]
set sink [new Agent/TCPSink]

$app attach-agent $agent

$ns_ attach-agent $node_(0) $agent
$ns_ attach-agent $node_(4) $sink
$ns_ connect $agent $sink


# 30 seconds of warmup time for routing
$ns_ at 0.0 "$app start"
# 60 seconds of running the simulation time
$ns_ at 120.0 "$ns_ halt"
$ns_ run

$ns_ flush-trace
close $tracefd