def subnets
      subnet = []
      index = 0
      while index < @datas.count
        index += 1
        subnet << DHCPParser::Conf.get_subnet(@datas["net#{index}"])
      end
      return subnet
    end
def subnets
      subnet = []
      index = 0
      while index < @datas.count
        index += 1
        subnet << DHCPParser::Conf.get_subnet(@datas["net#{index}"])
      end
      return subnet
    end
Get list subnet