# A 3-node example for ad-hoc simulation with AODV
# Define options
set val(chan) Channel/WirelessChannel ;# channel type
set val(prop) Propagation/TwoRayGround ;# radio-propagation model
set val(netif) Phy/WirelessPhy ;# network interface type
set val(mac) Mac/802_11 ;# MAC type

set val(ifq) Queue/DropTail/PriQueue ;# interface queue type
set val(ll) LL ;# link layer type
set val(ant) Antenna/OmniAntenna ;# antenna model
set val(ifqlen) 50 ;# max packet in ifq
set val(nn) 3 ;# number of mobilenodes
set val(rp) AODV ;# routing protocol
set val(x) 300 ;# X dimension of topography
set val(y) 300 ;# Y dimension of topography
set val(stop) 15 ;# time of simulation end
set ns [new Simulator]
set tracefd [open simple.tr w]
set windowVsTime2 [open win.tr w]
set namtrace [open simwrls.nam w]
$ns trace-all $tracefd
$ns namtrace-all-wireless $namtrace $val(x) $val(y)

# set up topography object
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)
create-god $val(nn)

#
# Create nn mobilenodes [$val(nn)], attach to the channel anf configure them.
#
$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]
}

# Provide initial location of mobilenodes
$node_(0) set X_ 150.0
$node_(0) set Y_ 50.0
$node_(0) set Z_ 0.0
$node_(1) set X_ 280.0
$node_(1) set Y_ 10.0

$node_(1) set Z_ 0.0
$node_(2) set X_ 40.0
$node_(2) set Y_ 50.0
$node_(2) set Z_ 0.0

# Generation of movements : set dest to x, y with speed s.
$ns at 1.0 "$node_(0) setdest 80.0 100.0 5.0"
$ns at 1.0 "$node_(2) setdest 1.0 250.0 15.0"

# Set a TCP connection between node_(0) and node_(1)
set tcp [new Agent/TCP/Newreno]
$tcp set class_ 2
set sink [new Agent/TCPSink]
$ns attach-agent $node_(1) $tcp
$ns attach-agent $node_(2) $sink
$ns connect $tcp $sink
set ftp [new Application/FTP]
$ftp attach-agent $tcp
$ns at 1.0 "$ftp start"
$ns at 12.0 "$ftp stop"

# Printing the window size
proc plotWindow {tcpSource file} {
    global ns
    set time 0.01
    set now [$ns now]²
    set cwnd [$tcpSource set cwnd_]
    puts $file "$now $cwnd"
    $ns at [expr $now+$time] "plotWindow $tcpSource $file"
    $ns at 10.1 "plotWindow $tcp $windowVsTime2"
}

# Define node initial position in nam
for {set i 0} {$i < $val(nn)} { incr i } {
    # 30 defines the node size for nam
    $ns initial_node_pos $node_($i) 30
}

# Telling nodes when the simulation ends
for {set i 0} {$i < $val(nn) } { incr i } {
    $ns at $val(stop) "$node_($i) reset";
}

# ending nam and the simulation
$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 namtrace
    $ns flush-trace
    close $tracefd
    close $namtrace
}

$ns run