Class: StunClient

Inherits:
Object
  • Object
show all
Defined in:
lib/toquen/stunning.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(host, port) ⇒ StunClient

Returns a new instance of StunClient.



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# File 'lib/toquen/stunning.rb', line 5

def initialize(host, port)
  @host = host
  @port = port
end

Class Method Details

.get_ip ⇒ Object 



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# File 'lib/toquen/stunning.rb', line 38

def self.get_ip
  servers = [['stun.l.google.com', 19_302], ['stun.ekiga.net', 3478], ['stunserver.org', 3478]]
  servers.each do |host, port|
    ip = StunClient.new(host, port).get_ip
    return ip unless ip.nil?
  end
  nil
end

Instance Method Details

#get_ip ⇒ Object 



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# File 'lib/toquen/stunning.rb', line 10

def get_ip
  Timeout.timeout(0.5) do
    socket = UDPSocket.new
    data = [0x0001, 0].pack('nn') + Random.new.bytes(16)
    socket.send(data, 0, @host, @port)
    data, = socket.recvfrom(1000)
    type, length = data.unpack('nn')

    # if not a message binding response
    return nil unless type == 0x0101

    data = data[20..-1]
    until data.empty?
      type, length = data.unpack('nn')
      # if attr type is ATTR_MAPPED_ADDRESS, return it
      if type == 0x0001
        values = data[4...4 + length].unpack('CCnCCCC')
        return values[3..-1] * '.'
      end
      data = data[4 + length..-1]
    end

    return nil
  end
rescue Timeout::Error
  return nil
end