final int start = dstIndex;
        SMBUtil.writeInt2(33, dst, dstIndex);
        dst[dstIndex + 2] = this.infoType;
        dst[dstIndex + 3] = this.fileInfoClass;
        dstIndex += 4;

        final int bufferLengthOffset = dstIndex;
        dstIndex += 4;
        final int bufferOffsetOffset = dstIndex;
        dstIndex += 4;

        SMBUtil.writeInt4(this.additionalInformation, dst, dstIndex);

            return 0;
        }

        writeInt2(subCommand & 0xFF, dst, dstIndex);
        dstIndex += 2;
        System.arraycopy(descr, 0, dst, dstIndex, descr.length);
        dstIndex += descr.length;
        writeInt2(0x0001, dst, dstIndex);
        dstIndex += 2;
        writeInt2(maxDataCount, dst, dstIndex);
        dstIndex += 2;
        writeInt4(serverTypes, dst, dstIndex);
        dstIndex += 4;

            SMBUtil.writeInt4(0, buffer, SmbConstants.ERROR_CODE_OFFSET);
            buffer[SmbConstants.FLAGS_OFFSET] = 0x12;
            SMBUtil.writeInt2(0x3456, buffer, SmbConstants.FLAGS_OFFSET + 1);
            SMBUtil.writeInt2(0x1234, buffer, SmbConstants.TID_OFFSET);
            SMBUtil.writeInt2(0x5678, buffer, SmbConstants.TID_OFFSET + 2);
            SMBUtil.writeInt2(0x9ABC, buffer, SmbConstants.TID_OFFSET + 4);

        final int start = dstIndex;

        SMBUtil.writeInt2(this.sid, dst, dstIndex);
        dstIndex += 2;
        SMBUtil.writeInt2(this.maxItems, dst, dstIndex);
        dstIndex += 2;
        SMBUtil.writeInt2(this.informationLevel, dst, dstIndex);
        dstIndex += 2;
        SMBUtil.writeInt4(this.resumeKey, dst, dstIndex);
        dstIndex += 4;
        SMBUtil.writeInt2(this.tflags, dst, dstIndex);
        dstIndex += 2;

    @Override
    int writeParametersWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;

        writeInt2(fid, dst, dstIndex);
        dstIndex += 2;
        dst[dstIndex] = (byte) 0x00; // Reserved
        dstIndex++;
        dst[dstIndex++] = (byte) 0x00; // Reserved
        writeInt4(securityInformation, dst, dstIndex);
        dstIndex += 4;

        return dstIndex - start;
    }

    @Override

        }

        SMBUtil.writeInt2(getSubCommand() & 0xFF, dst, dstIndex);
        dstIndex += 2;
        System.arraycopy(descr, 0, dst, dstIndex, descr.length);
        dstIndex += descr.length;
        SMBUtil.writeInt2(0x0001, dst, dstIndex);
        dstIndex += 2;
        SMBUtil.writeInt2(this.maxDataCount, dst, dstIndex);
        dstIndex += 2;
        SMBUtil.writeInt4(this.serverTypes, dst, dstIndex);

     */
    @Override
    protected int writeBytesWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;
        SMBUtil.writeInt2(48, dst, dstIndex);
        SMBUtil.writeInt2(this.locks.length, dst, dstIndex + 2);
        dstIndex += 4;
        SMBUtil.writeInt4((this.lockSequenceNumber & 0xF) << 28 | this.lockSequenceIndex & 0x0FFFFFFF, dst, dstIndex);
        dstIndex += 4;

        SMBUtil.writeInt2(this.totalParameterCount, dst, dstIndex);
        dstIndex += 2;
        SMBUtil.writeInt2(this.totalDataCount, dst, dstIndex);
        dstIndex += 2;
        if (this.getCommand() != SMB_COM_TRANSACTION_SECONDARY) {
            SMBUtil.writeInt2(this.maxParameterCount, dst, dstIndex);
            dstIndex += 2;
            SMBUtil.writeInt2(this.maxDataCount, dst, dstIndex);

     * @see jcifs.Encodable#encode(byte[], int)
     */
    @Override
    public int encode(final byte[] dst, int dstIndex) {
        final int start = dstIndex;
        SMBUtil.writeInt8(this.timeout, dst, dstIndex);
        dstIndex += 8;
        SMBUtil.writeInt4(this.nameBytes.length, dst, dstIndex);
        dstIndex += 4;

        dst[dstIndex] = (byte) (this.timeoutSpecified ? 0x1 : 0x0);
        dstIndex++;

	for i := range w.buffer {
		delete(w.buffer, i)
	}
	w.wg.Wait()
	return err
}

type writerAt struct {
	w      *io.PipeWriter
	r      *io.PipeReader
	wg     *sync.WaitGroup
	buffer map[int64][]byte
	err    error

	nextOffset int64
	m          sync.Mutex
}

func (w *writerAt) WriteAt(b []byte, offset int64) (n int, err error) {
	w.m.Lock()
	defer w.m.Unlock()