# File lib/net/dns/names/names.rb, line 60
      def pack_name(name)
        if name.size > 63
          raise ArgumentError, "Label data cannot exceed 63 chars"
        end
        arr = name.split(".")
        str = ""
        arr.each do |elem|
          str += [elem.size,elem].pack("Ca*")
        end
        str += [0].pack("C")
        str
      end