# 采用了參數傳遞的形式，可以直接通過命令行方便的模仿ad hoc的所有平面路由協議
if {$argc !=4} {
        puts "Usage: ns adhoc.tcl  Routing_Protocol Traffic_Pattern Scene_Pattern Num_Of_Node"
        puts "Example:ns adhoc.tcl AODV cbr-50-10-8 scene-50-0-20 50"
        exit
}

set par1 [lindex $argv 0]
set par2 [lindex $argv 1]
set par3 [lindex $argv 2] 
set par4 [lindex $argv 3]
# ======================================================================
# 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
if { $par1=="DSR"} {
  set val(ifq) 		      CMUPriQueue 
  } else {
  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(rp)             $par1                      ;# routing protocol
set val(x) 		          1000
set val(y)		          1000
set val(seed)		        0.0
set val(tr)		          $par1-$par3.tr
set val(nam)		        $par1-$par3.nam
set val(nn)		          $par4                         ;# number of mobilenodes
set val(cp)		          "traffic/$par2"
set val(sc)             "scenarios/$par3"
set val(stop)		        100.0

# ======================================================================
# Main Program
# ======================================================================


#
# Initialize Global Variables
#
set ns_		[new Simulator]
set tracefd     [open $val(tr) w]
$ns_ trace-all $tracefd
set namtracefd [open $val(nam) w]
$ns_ namtrace-all-wireless $namtracefd $val(x) $val(y)

# set up topography object
set topo       [new Topography]

$topo load_flatgrid $val(x) $val(y)

#
# Create God
#
set god_ [create-god $val(nn)]

#
#  Create the specified number of mobilenodes [$val(nn)] and "attach" them
#  to the channel. 
# configure node
# set chan_1_ [new $val(chan)]
        $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 OFF			
			 
	for {set i 0} {$i < $val(nn) } {incr i} {
		set node_($i) [$ns_ node]	
		$node_($i) random-motion 0		;# disable random motion
	}

puts "Loading connection pattern..."
source $val(cp)

puts "Loading scenario file..."
source $val(sc)
 
for {set i 0} {$i < $val(nn) } {incr i} {
    $ns_ initial_node_pos $node_($i) 20
}

#
# Tell nodes when the simulation ends
#
for {set i 0} {$i < $val(nn) } {incr i} {
    $ns_ at $val(stop).000000001 "$node_($i) reset";
}
$ns_ at $val(stop).000000001 "finish"
$ns_ at $val(stop).000000001 "puts \"NS EXITING...\"; $ns_ halt"
proc finish {} {
    global ns_ tracefd namtracefd
    $ns_ flush-trace
    close $tracefd
    close $namtracefd
   # exec nam adhoc.nam &
	  exit 0 
}

puts "Starting Simulation..."
$ns_ run