Send Hard coded discovery message using Ruby

The following Ruby code loads a Discovery probe message from a file and send it as  multicast udp message to the discovery proxy address

require "socket"
require "ipaddr"

MULTICAST_ADDR = "239.255.255.250"
PORT = 3702

def get_file_as_string(filename)
  data = ''
  f = File.open(filename, "r") 
  f.each_line do |line|
    data += line
  end
  return data
end

def SendDiscoveryProbeMsg (pMsg)

    socket = UDPSocket.open

    socket.setsockopt(Socket::IPPROTO_IP, Socket::IP_MULTICAST_TTL, 10)

    socket.send(pMsg, 0, MULTICAST_ADDR, PORT)

    socket.close
end 

theTemplateTxt = get_file_as_string 'DescoveryProbeTemplate.xml'

puts theTemplateTxt

SendDiscoveryProbeMsg theTemplateTxt

The Message is :


<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
  <s:Header>
    <a:Action s:mustUnderstand="1">http://docs.oasis-open.org/ws-dd/ns/discovery/2009/01/Probe</a:Action>
    <a:MessageID>urn:uuid:4faf9212-2449-43bd-9cfb-9cf8b12300d1</a:MessageID>
    <a:ReplyTo>
      <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
    </a:ReplyTo>
    <a:To s:mustUnderstand="1">urn:docs-oasis-open-org:ws-dd:ns:discovery:2009:01</a:To>
  </s:Header>
  <s:Body>
    <Probe xmlns="http://docs.oasis-open.org/ws-dd/ns/discovery/2009/01">
      <d:Types xmlns:d="http://docs.oasis-open.org/ws-dd/ns/discovery/2009/01" xmlns:dp0="http://Microsoft.Samples.Discovery">dp0:ICalculatorService</d:Types>
      <Duration xmlns="http://schemas.microsoft.com/ws/2008/06/discovery">PT5S</Duration>
    </Probe>
  </s:Body>
</s:Envelope>