SMBUtil.writeInt8(this.sessionId, dst, dstIndex + 40);
        }
        else {
            // 4 reserved
            SMBUtil.writeInt4(this.treeId, dst, dstIndex + 36);
            SMBUtil.writeInt8(this.sessionId, dst, dstIndex + 40);
            // + signature
        }

        return Smb2Constants.SMB2_HEADER_LENGTH;
    }