public static boolean isCompatIPv4Address(Inet6Address ip) {
    if (!ip.isIPv4CompatibleAddress()) {
      return false;
    }

    byte[] bytes = ip.getAddress();
    if ((bytes[12] == 0)
        && (bytes[13] == 0)
        && (bytes[14] == 0)
        && ((bytes[15] == 0) || (bytes[15] == 1))) {
      return false;
    }

    return true;
  }

  /**

	LogAllBody bool

	ttfbHeader time.Duration
	ttfbBody   time.Duration

	StartTime time.Time
	// number of bytes written
	bytesWritten int
	// number of bytes of response headers written
	headerBytesWritten int
	// Internal recording buffer
	headers bytes.Buffer
	body    bytes.Buffer
	// Indicate if headers are written in the log
	headersLogged bool
}

// Hijack - hijacks the underlying connection

  }

  /**
   * Writes all the given bytes to this sink.
   *
   * @throws IOException if an I/O occurs while writing to this sink
   */
  public void write(byte[] bytes) throws IOException {
    checkNotNull(bytes);

    try (OutputStream out = openStream()) {
      out.write(bytes);
    }
  }

  /**
   * Writes all the bytes from the given {@code InputStream} to this sink. Does not close {@code

  }

  /**
   * Writes all the given bytes to this sink.
   *
   * @throws IOException if an I/O occurs while writing to this sink
   */
  public void write(byte[] bytes) throws IOException {
    checkNotNull(bytes);

    try (OutputStream out = openStream()) {
      out.write(bytes);
    }
  }

  /**
   * Writes all the bytes from the given {@code InputStream} to this sink. Does not close {@code

    }

    /**
     * Get preferred send size
     *
     * @return preferred send size in bytes
     */
    public int getPreferredSendSize() {
        return preferredSendSize;
    }

    /**
     * Set preferred send size
     *
     * @param preferredSendSize preferred send size in bytes
     */
    public void setPreferredSendSize(int preferredSendSize) {

	buf := new(bytes.Buffer)
	binary.Write(buf, binary.BigEndian, uint32(totalLength))
	binary.Write(buf, binary.BigEndian, uint32(headerLength))
	prelude := buf.Bytes()
	binary.Write(buf, binary.BigEndian, crc32.ChecksumIEEE(prelude))
	buf.Write(header)
	if payload != nil {
		buf.Write(payload)
	}
	message := buf.Bytes()
	binary.Write(buf, binary.BigEndian, crc32.ChecksumIEEE(message))

        }

        @Override
        int writeParameterWordsWireFormat(byte[] dst, int dstIndex) {
            System.arraycopy(paramWords, 0, dst, dstIndex, paramWords.length);
            return paramWords.length;
        }

        @Override
        int writeBytesWireFormat(byte[] dst, int dstIndex) {
            System.arraycopy(bytes, 0, dst, dstIndex, bytes.length);
            return bytes.length;

     * context and count, and leaving (buffering) the remaining bytes in buffer
     * for the next update or finish.
     *
     * @param    input    input block
     * @param    offset    start of meaningful bytes in input
     * @param    len        count of bytes in input block to consider
     */
    @Override

        // Set up the buffer with test data
        // sid (2 bytes)
        buffer[0] = 0x01;
        buffer[1] = 0x00;
        // numEntries (2 bytes)
        buffer[2] = 0x05;
        buffer[3] = 0x00;
        // isEndOfSearch (2 bytes, bit 0 of first byte)
        buffer[4] = 0x01; // end of search = true
        buffer[5] = 0x00;
        // eaErrorOffset (2 bytes)
        buffer[6] = 0x00;
        buffer[7] = 0x00;

      ensureCapacity(Byte.BYTES);
      buffer.put(b);
      return this;
    }

    @Override
    public Hasher putBytes(byte[] bytes, int off, int len) {
      ensureCapacity(len);
      buffer.put(bytes, off, len);
      return this;
    }

    @Override
    public Hasher putBytes(ByteBuffer bytes) {
      ensureCapacity(bytes.remaining());
      buffer.put(bytes);