= Tutorial-1: Hello World Example ==

[[TOC(heading=Tutorial TOC, Tutorial, Tutorial/Testbed, Tutorial/HelloWorld, Tutorial/UnderstandingHelloWorld, Tutorial/HowtoWriteScripts, Tutorial/CollectMeasurements, Tutorial/AnalyzeResults, depth=2)]]

The "Hello World" Experiment is simple.  The script for this experiment is shown below.

{{{

#
# Define nodes used in experiment
#
defNodes('sender', [1,1]) {|node|
  node.image = nil  # assume the right image to be on disk

  node.prototype("test:proto:sender", {
    'destinationHost' => '192.168.1.2',
    'packetSize' => 1024,
    'rate' => 300,
    'protocol' => 'udp'    
  })
  node.net.w0.mode = "managed"
}

defNodes('receiver', [1,2]) {|node|
  node.image = nil  # assume the right image to be on disk
  node.prototype("test:proto:receiver" , {
    'protocol' => 'udp'
  })
  node.net.w0.mode = "master"
}

allNodes.net.w0 { |w|
  w.type = 'b'
  w.essid = "helloworld"
  w.ip = "%192.168.%x.%y"
}

#
# Now, start the application
#
whenAllInstalled() {|node|
  wait 30 

  allNodes.startApplications
  wait 40

  Experiment.done
}
}}}

Figure 1.  Script for "Hello World" Experiment


To understand the details of the script, go to [wiki:Tutorial/UnderstandingHelloWorld Understanding the Hello World Script]