class MQTT::SN::Packet::Gwinfo

def encode_body
  [gateway_id, gateway_address].pack('Ca*')
end

def parse_body(buffer)
  if buffer.length > 1
    self.gateway_id, self.gateway_address = buffer.unpack('Ca*')
  else
    self.gateway_id, _ignore = buffer.unpack('C')
    self.gateway_address = nil
  end
end