encode

# File lib/resolv.rb, line 1427
      def encode
        return MessageEncoder.new {|msg|
          msg.put_pack('nnnnnn',
            @id,
            (@qr & 1) << 15 |
            (@opcode & 15) << 11 |
            (@aa & 1) << 10 |
            (@tc & 1) << 9 |
            (@rd & 1) << 8 |
            (@ra & 1) << 7 |
            (@rcode & 15),
            @question.length,
            @answer.length,
            @authority.length,
            @additional.length)
          @question.each {|q|
            name, typeclass = q
            msg.put_name(name)
            msg.put_pack('nn', typeclass::TypeValue, typeclass::ClassValue)
          }
          [@answer, @authority, @additional].each {|rr|
            rr.each {|r|
              name, ttl, data = r
              msg.put_name(name)
              msg.put_pack('nnN', data.class::TypeValue, data.class::ClassValue, ttl)
              msg.put_length16 {data.encode_rdata(msg)}
            }
          }
        }.to_s
      end