int headerStart = 0;
        int bodyStart = Smb2Constants.SMB2_HEADER_LENGTH;

        // Write SMB2 header (64 bytes)
        // Protocol ID
        System.arraycopy(new byte[] { (byte) 0xFE, 'S', 'M', 'B' }, 0, buffer, headerStart, 4);
        // Structure size (64)
        SMBUtil.writeInt2(64, buffer, headerStart + 4);
        // Credit charge
        SMBUtil.writeInt2(1, buffer, headerStart + 6);

             * 00SSFSMB
             * 0 - 0's
             * S - size of payload
             * FSMB - 0xFF SMB magic #
             */

            if (this.sbuf[0] == (byte) 0x00 && this.sbuf[4] == (byte) 0xFE && this.sbuf[5] == (byte) 'S' && this.sbuf[6] == (byte) 'M'
                    && this.sbuf[7] == (byte) 'B') {
                this.smb2 = true;
                // also read the rest of the header