## A simple push example# This example tests directed diffusion in a 5 node scenario with # 1 each of a push sender and recvr## ==================================================================# Define options# ===================================================================set opt(chan)		Channel/WirelessChannelset opt(prop)		Propagation/TwoRayGroundset opt(netif)		Phy/WirelessPhyset opt(mac)		Mac/802_11set opt(ifq)		Queue/DropTail/PriQueueset opt(ll)		LLset opt(ant)            Antenna/OmniAntennaset opt(filters)        GradientFilter  ;# old name for twophasepull filterset opt(x)		670	;# X dimension of the topographyset opt(y)		670     ;# Y dimension of the topographyset opt(ifqlen)		50	;# max packet in ifqset opt(nn)		5	;# number of nodesset opt(sndr)            1      ;# no of sendersset opt(rcvr)            1      ;# no of recvrsset opt(seed)		0.0set opt(stop)		500	;# simulation timeset opt(prestop)        49       ;# time to prepare to stopset opt(tr)		"push-5n-1s-1r.tr"	;# trace fileset opt(nam)            "push-5n-1s-1r.nam"  ;# nam fileset opt(adhocRouting)   Directed_Diffusion# ==================================================================LL set mindelay_		50usLL set delay_			25usLL set bandwidth_		0	;# not usedQueue/DropTail/PriQueue set Prefer_Routing_Protocols    1# unity gain, omni-directional antennas# set up the antennas to be centered in the node and 1.5 meters above itAntenna/OmniAntenna set X_ 0Antenna/OmniAntenna set Y_ 0Antenna/OmniAntenna set Z_ 1.5Antenna/OmniAntenna set Gt_ 1.0Antenna/OmniAntenna set Gr_ 1.0# Initialize the SharedMedia interface with parameters to make# it work like the 914MHz Lucent WaveLAN DSSS radio interfacePhy/WirelessPhy set CPThresh_ 10.0Phy/WirelessPhy set CSThresh_ 1.559e-11Phy/WirelessPhy set RXThresh_ 3.652e-10Phy/WirelessPhy set Rb_ 2*1e6Phy/WirelessPhy set Pt_ 0.2818Phy/WirelessPhy set freq_ 914e+6 Phy/WirelessPhy set L_ 1.0# ==================================================================# Main Program# =================================================================## Initialize Global Variables#set ns_		[new Simulator] set topo	[new Topography]set tracefd	[open $opt(tr) w]$ns_ trace-all $tracefdset nf [open $opt(nam) w]$ns_ namtrace-all-wireless $nf $opt(x) $opt(y)#$ns_ use-newtrace$topo load_flatgrid $opt(x) $opt(y)set god_ [create-god $opt(nn)]# log the mobile nodes movements if desired#if { $opt(lm) == "on" } {#    log-movement#}#global node setting$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 \                 -diffusionFilter $opt(filters) \		 -agentTrace ON \                 -routerTrace ON \                 -macTrace ON                  #  Create the specified number of nodes [$opt(nn)] and "attach" them#  to the channel. for {set i 0} {$i < $opt(nn) } {incr i} {	set node_($i) [$ns_ node $i]        $node_($i) color black	$node_($i) random-motion 0		;# disable random motion        $god_ new_node $node_($i)}puts "Loading connection pattern..."$node_(0) set X_ 18.587605569735$node_(0) set Y_ 401.886827012678$node_(0) set Z_ 0.000000000000$node_(1) set X_ 11.901958617639$node_(1) set Y_ 36.218497218617$node_(1) set Z_ 0.000000000000$node_(2) set X_ 224.282785411393$node_(2) set Y_ 20.774608253697$node_(2) set Z_ 0.000000000000$node_(3) set X_ 158.840938304009$node_(3) set Y_ 139.650216383776$node_(3) set Z_ 0.000000000000$node_(4) set X_ 101.186886005903$node_(4) set Y_ 147.993190973633$node_(4) set Z_ 0.000000000000# 1 push senderfor {set i 1} {$i <= $opt(sndr)} {incr i} {    set src_($i) [new Application/DiffApp/PushSender]    $ns_ attach-diffapp $node_($i) $src_($i)    $ns_ at [expr 0.123 * [expr 1+$i]] "$src_($i) publish"}# 1 push receiverfor {set i 0} {$i < $opt(rcvr)} {incr i} {    set snk_($i) [new Application/DiffApp/PushReceiver]    $ns_ attach-diffapp $node_([expr $opt(nn)-1 -$i]) $snk_($i)    $ns_ at [expr 1.156 * [expr 1+$i]] "$snk_($i) subscribe"}# Define node initial position in namfor {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 nodes when the simulation ends#for {set i 0} {$i < $opt(nn) } {incr i} {    $ns_ at $opt(stop).000000001 "$node_($i) reset";}# tell nam the simulation stop time$ns_ at  $opt(stop)	"$ns_ nam-end-wireless $opt(stop)"$ns_ at  $opt(stop).000000001 "puts \"NS EXITING...\" ; $ns_ halt"puts $tracefd "Directed Diffusion:2PP/5nodes/1sender/1rcvr"puts $tracefd "M 0.0 nn $opt(nn) x $opt(x) y $opt(y)"puts $tracefd "M 0.0 prop $opt(prop) ant $opt(ant)"puts "Starting Simulation..."$ns_ run