class StunClient

Public Class Methods

get_ip() click to toggle source
# 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
new(host, port) click to toggle source
# File lib/toquen/stunning.rb, line 5
def initialize(host, port)
  @host = host
  @port = port
end

Public Instance Methods

get_ip() click to toggle source
# 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