// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : Constructor.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Direct device access.
//
// --[ Description ] ----------------------------------------------------------
//
//     Prepares a device for direct access.
//
// --[ License ] --------------------------------------------------------------
//
//     This library is free software; you can redistribute it and/or modify
//     it under the terms of the GNU Lesser General Public License as
//     published by the Free Software Foundation; either version 2.1 of the
//     License, or (at your option) any later version.
//
//     This library is distributed in the hope that it will be useful, but
//     WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
//     Lesser General Public License for more details.
//
//     You should have received a copy of the GNU Lesser General Public
//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2019 Natalia Portillo
// ****************************************************************************/

using System;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using DiscImageChef.CommonTypes.Enums;
using DiscImageChef.CommonTypes.Interop;
using DiscImageChef.Decoders.ATA;
using DiscImageChef.Decoders.SCSI;
using DiscImageChef.Decoders.SCSI.MMC;
using DiscImageChef.Devices.FreeBSD;
using DiscImageChef.Devices.Windows;
using Microsoft.Win32.SafeHandles;
using Extern = DiscImageChef.Devices.Windows.Extern;
using FileAccess = DiscImageChef.Devices.Windows.FileAccess;
using FileAttributes = DiscImageChef.Devices.Windows.FileAttributes;
using FileFlags = DiscImageChef.Devices.Linux.FileFlags;
using FileMode = DiscImageChef.Devices.Windows.FileMode;
using FileShare = DiscImageChef.Devices.Windows.FileShare;
using PlatformID = DiscImageChef.CommonTypes.Interop.PlatformID;
using VendorString = DiscImageChef.Decoders.SecureDigital.VendorString;

namespace DiscImageChef.Devices
{
    public partial class Device
    {
        /// <summary>
        ///     Opens the device for sending direct commands
        /// </summary>
        /// <param name="devicePath">Device path</param>
        public Device(string devicePath)
        {
            PlatformId = DetectOS.GetRealPlatformID();
            Timeout = 15;
            Error = false;
            IsRemovable = false;

            if (devicePath.StartsWith("dic://"))
            {
                devicePath = devicePath.Substring(6);
                var pieces = devicePath.Split('/');
                var host = pieces[0];
                devicePath = devicePath.Substring(host.Length);

                remote = new Remote.Remote(host);

                Error = !remote.Open(devicePath, out var errno);
                LastError = errno;
            }
            else
            {
                switch (PlatformId)
                {
                    case PlatformID.Win32NT:
                    {
                        FileHandle = Extern.CreateFile(devicePath, FileAccess.GenericRead | FileAccess.GenericWrite,
                            FileShare.Read | FileShare.Write, IntPtr.Zero,
                            FileMode.OpenExisting,
                            FileAttributes.Normal, IntPtr.Zero);

                        if (((SafeFileHandle) FileHandle).IsInvalid)
                        {
                            Error = true;
                            LastError = Marshal.GetLastWin32Error();
                        }

                        break;
                    }
                    case PlatformID.Linux:
                    {
                        FileHandle =
                            Linux.Extern.open(devicePath,
                                FileFlags.ReadWrite | FileFlags.NonBlocking | FileFlags.CreateNew);

                        if ((int) FileHandle < 0)
                        {
                            LastError = Marshal.GetLastWin32Error();

                            if (LastError == 13 || LastError == 30) // EACCES or EROFS
                            {
                                FileHandle = Linux.Extern.open(devicePath, FileFlags.Readonly | FileFlags.NonBlocking);
                                if ((int) FileHandle < 0)
                                {
                                    Error = true;
                                    LastError = Marshal.GetLastWin32Error();
                                }
                            }
                            else
                            {
                                Error = true;
                            }

                            LastError = Marshal.GetLastWin32Error();
                        }

                        break;
                    }
                    case PlatformID.FreeBSD:
                    {
                        FileHandle = FreeBSD.Extern.cam_open_device(devicePath, FreeBSD.FileFlags.ReadWrite);

                        if (((IntPtr) FileHandle).ToInt64() == 0)
                        {
                            Error = true;
                            LastError = Marshal.GetLastWin32Error();
                        }

                        var camDevice = (CamDevice) Marshal.PtrToStructure((IntPtr) FileHandle, typeof(CamDevice));

                        if (StringHandlers.CToString(camDevice.SimName) == "ata")
                            throw new
                                InvalidOperationException(
                                    "Parallel ATA devices are not supported on FreeBSD due to upstream bug #224250.");

                        break;
                    }
                    default: throw new InvalidOperationException($"Platform {PlatformId} not yet supported.");
                }
            }

            if (Error) throw new SystemException($"Error {LastError} opening device.");

            Type = DeviceType.Unknown;
            ScsiType = PeripheralDeviceTypes.UnknownDevice;

            byte[] ataBuf;
            byte[] inqBuf = null;

            if (Error) throw new SystemException($"Error {LastError} trying device.");

            var scsiSense = true;

            if (remote is null)
            {
                // Windows is answering SCSI INQUIRY for all device types so it needs to be detected first
                switch (PlatformId)
                {
                    case PlatformID.Win32NT:
                        var query = new StoragePropertyQuery();
                        query.PropertyId = StoragePropertyId.Device;
                        query.QueryType = StorageQueryType.Standard;
                        query.AdditionalParameters = new byte[1];

                        var descriptorPtr = Marshal.AllocHGlobal(1000);
                        var descriptorB = new byte[1000];

                        uint returned = 0;
                        var error = 0;

                        var hasError = !Extern.DeviceIoControlStorageQuery((SafeFileHandle) FileHandle,
                            WindowsIoctl.IoctlStorageQueryProperty,
                            ref query, (uint) Marshal.SizeOf(query),
                            descriptorPtr, 1000, ref returned, IntPtr.Zero);

                        if (hasError) error = Marshal.GetLastWin32Error();

                        Marshal.Copy(descriptorPtr, descriptorB, 0, 1000);

                        if (!hasError && error == 0)
                        {
                            var descriptor = new StorageDeviceDescriptor
                            {
                                Version = BitConverter.ToUInt32(descriptorB, 0),
                                Size = BitConverter.ToUInt32(descriptorB, 4),
                                DeviceType = descriptorB[8],
                                DeviceTypeModifier = descriptorB[9],
                                RemovableMedia = descriptorB[10] > 0,
                                CommandQueueing = descriptorB[11] > 0,
                                VendorIdOffset = BitConverter.ToInt32(descriptorB, 12),
                                ProductIdOffset = BitConverter.ToInt32(descriptorB, 16),
                                ProductRevisionOffset = BitConverter.ToInt32(descriptorB, 20),
                                SerialNumberOffset = BitConverter.ToInt32(descriptorB, 24),
                                BusType = (StorageBusType) BitConverter.ToUInt32(descriptorB, 28),
                                RawPropertiesLength = BitConverter.ToUInt32(descriptorB, 32)
                            };
                            descriptor.RawDeviceProperties = new byte[descriptor.RawPropertiesLength];
                            Array.Copy(descriptorB, 36, descriptor.RawDeviceProperties, 0,
                                descriptor.RawPropertiesLength);

                            switch (descriptor.BusType)
                            {
                                case StorageBusType.SCSI:
                                case StorageBusType.SSA:
                                case StorageBusType.Fibre:
                                case StorageBusType.iSCSI:
                                case StorageBusType.SAS:
                                    Type = DeviceType.SCSI;
                                    break;
                                case StorageBusType.FireWire:
                                    IsFireWire = true;
                                    Type = DeviceType.SCSI;
                                    break;
                                case StorageBusType.USB:
                                    IsUsb = true;
                                    Type = DeviceType.SCSI;
                                    break;
                                case StorageBusType.ATAPI:
                                    Type = DeviceType.ATAPI;
                                    break;
                                case StorageBusType.ATA:
                                case StorageBusType.SATA:
                                    Type = DeviceType.ATA;
                                    break;
                                case StorageBusType.MultiMediaCard:
                                    Type = DeviceType.MMC;
                                    break;
                                case StorageBusType.SecureDigital:
                                    Type = DeviceType.SecureDigital;
                                    break;
                                case StorageBusType.NVMe:
                                    Type = DeviceType.NVMe;
                                    break;
                            }

                            switch (Type)
                            {
                                case DeviceType.SCSI:
                                case DeviceType.ATAPI:
                                    scsiSense = ScsiInquiry(out inqBuf, out _);
                                    break;
                                case DeviceType.ATA:
                                    var atapiSense = AtapiIdentify(out ataBuf, out _);

                                    if (!atapiSense)
                                    {
                                        Type = DeviceType.ATAPI;
                                        var ataid = Identify.Decode(ataBuf);

                                        if (ataid.HasValue) scsiSense = ScsiInquiry(out inqBuf, out _);
                                    }
                                    else
                                    {
                                        Manufacturer = "ATA";
                                    }

                                    break;
                            }
                        }

                        Marshal.FreeHGlobal(descriptorPtr);

                        if (Windows.Command.IsSdhci((SafeFileHandle) FileHandle))
                        {
                            var sdBuffer = new byte[16];

                            LastError = Windows.Command.SendMmcCommand((SafeFileHandle) FileHandle, MmcCommands.SendCsd,
                                false, false,
                                MmcFlags.ResponseSpiR2 | MmcFlags.ResponseR2 |
                                MmcFlags.CommandAc, 0, 16, 1, ref sdBuffer, out _,
                                out _, out var sense);

                            if (!sense)
                            {
                                cachedCsd = new byte[16];
                                Array.Copy(sdBuffer, 0, cachedCsd, 0, 16);
                            }

                            sdBuffer = new byte[16];

                            LastError = Windows.Command.SendMmcCommand((SafeFileHandle) FileHandle, MmcCommands.SendCid,
                                false, false,
                                MmcFlags.ResponseSpiR2 | MmcFlags.ResponseR2 |
                                MmcFlags.CommandAc, 0, 16, 1, ref sdBuffer, out _,
                                out _, out sense);

                            if (!sense)
                            {
                                cachedCid = new byte[16];
                                Array.Copy(sdBuffer, 0, cachedCid, 0, 16);
                            }

                            sdBuffer = new byte[8];

                            LastError = Windows.Command.SendMmcCommand((SafeFileHandle) FileHandle,
                                (MmcCommands) SecureDigitalCommands.SendScr, false,
                                true,
                                MmcFlags.ResponseSpiR1 | MmcFlags.ResponseR1 |
                                MmcFlags.CommandAdtc, 0, 8, 1, ref sdBuffer, out _,
                                out _, out sense);

                            if (!sense)
                            {
                                cachedScr = new byte[8];
                                Array.Copy(sdBuffer, 0, cachedScr, 0, 8);
                            }

                            if (cachedScr != null)
                            {
                                sdBuffer = new byte[4];

                                LastError = Windows.Command.SendMmcCommand((SafeFileHandle) FileHandle,
                                    (MmcCommands) SecureDigitalCommands
                                        .SendOperatingCondition, false, true,
                                    MmcFlags.ResponseSpiR3 | MmcFlags.ResponseR3 |
                                    MmcFlags.CommandBcr, 0, 4, 1, ref sdBuffer,
                                    out _, out _, out sense);

                                if (!sense)
                                {
                                    cachedScr = new byte[4];
                                    Array.Copy(sdBuffer, 0, cachedScr, 0, 4);
                                }
                            }
                            else
                            {
                                sdBuffer = new byte[4];

                                LastError = Windows.Command.SendMmcCommand((SafeFileHandle) FileHandle,
                                    MmcCommands.SendOpCond, false, true,
                                    MmcFlags.ResponseSpiR3 | MmcFlags.ResponseR3 |
                                    MmcFlags.CommandBcr, 0, 4, 1, ref sdBuffer,
                                    out _, out _, out sense);

                                if (!sense)
                                {
                                    cachedScr = new byte[4];
                                    Array.Copy(sdBuffer, 0, cachedScr, 0, 4);
                                }
                            }
                        }

                        break;
                    case PlatformID.Linux:
                        if (devicePath.StartsWith("/dev/sd", StringComparison.Ordinal) ||
                            devicePath.StartsWith("/dev/sr", StringComparison.Ordinal) ||
                            devicePath.StartsWith("/dev/st", StringComparison.Ordinal))
                        {
                            scsiSense = ScsiInquiry(out inqBuf, out _);
                        }
                        // MultiMediaCard and SecureDigital go here
                        else if (devicePath.StartsWith("/dev/mmcblk", StringComparison.Ordinal))
                        {
                            var devPath = devicePath.Substring(5);
                            if (File.Exists("/sys/block/" + devPath + "/device/csd"))
                            {
                                var len =
                                    ConvertFromHexAscii("/sys/block/" + devPath + "/device/csd", out cachedCsd);
                                if (len == 0) cachedCsd = null;
                            }

                            if (File.Exists("/sys/block/" + devPath + "/device/cid"))
                            {
                                var len =
                                    ConvertFromHexAscii("/sys/block/" + devPath + "/device/cid", out cachedCid);
                                if (len == 0) cachedCid = null;
                            }

                            if (File.Exists("/sys/block/" + devPath + "/device/scr"))
                            {
                                var len =
                                    ConvertFromHexAscii("/sys/block/" + devPath + "/device/scr", out cachedScr);
                                if (len == 0) cachedScr = null;
                            }

                            if (File.Exists("/sys/block/" + devPath + "/device/ocr"))
                            {
                                var len =
                                    ConvertFromHexAscii("/sys/block/" + devPath + "/device/ocr", out cachedOcr);
                                if (len == 0) cachedOcr = null;
                            }
                        }

                        break;
                    default:
                        scsiSense = ScsiInquiry(out inqBuf, out _);
                        break;
                }
            }
            else
            {
                Type = remote.GetDeviceType();

                switch (Type)
                {
                    case DeviceType.ATAPI:
                    case DeviceType.SCSI:
                        scsiSense = ScsiInquiry(out inqBuf, out _);
                        break;
                    case DeviceType.SecureDigital:
                    case DeviceType.MMC:
                        if (!remote.GetSdhciRegisters(out cachedCsd, out cachedCid, out cachedOcr, out cachedScr))
                        {
                            Type = DeviceType.SCSI;
                            ScsiType = PeripheralDeviceTypes.DirectAccess;
                        }

                        break;
                }
            }

            #region SecureDigital / MultiMediaCard

            if (cachedCid != null)
            {
                ScsiType = PeripheralDeviceTypes.DirectAccess;
                IsRemovable = false;

                if (cachedScr != null)
                {
                    Type = DeviceType.SecureDigital;
                    var decoded = Decoders.SecureDigital.Decoders.DecodeCID(cachedCid);
                    Manufacturer = VendorString.Prettify(decoded.Manufacturer);
                    Model = decoded.ProductName;
                    Revision = $"{(decoded.ProductRevision & 0xF0) >> 4:X2}.{decoded.ProductRevision & 0x0F:X2}";
                    Serial = $"{decoded.ProductSerialNumber}";
                }
                else
                {
                    Type = DeviceType.MMC;
                    var decoded = Decoders.MMC.Decoders.DecodeCID(cachedCid);
                    Manufacturer = Decoders.MMC.VendorString.Prettify(decoded.Manufacturer);
                    Model = decoded.ProductName;
                    Revision = $"{(decoded.ProductRevision & 0xF0) >> 4:X2}.{decoded.ProductRevision & 0x0F:X2}";
                    Serial = $"{decoded.ProductSerialNumber}";
                }
            }

            #endregion SecureDigital / MultiMediaCard

            #region USB

            if (remote is null)
            {
                switch (PlatformId)
                {
                    case PlatformID.Linux:
                        if (devicePath.StartsWith("/dev/sd", StringComparison.Ordinal) ||
                            devicePath.StartsWith("/dev/sr", StringComparison.Ordinal) ||
                            devicePath.StartsWith("/dev/st", StringComparison.Ordinal))
                        {
                            var devPath = devicePath.Substring(5);
                            if (Directory.Exists("/sys/block/" + devPath))
                            {
                                var resolvedLink = Linux.Command.ReadLink("/sys/block/" + devPath);
                                if (!string.IsNullOrEmpty(resolvedLink))
                                {
                                    resolvedLink = "/sys" + resolvedLink.Substring(2);

                                    while (resolvedLink.Contains("usb"))
                                    {
                                        resolvedLink = Path.GetDirectoryName(resolvedLink);
                                        if (!File.Exists(resolvedLink + "/descriptors") ||
                                            !File.Exists(resolvedLink + "/idProduct") ||
                                            !File.Exists(resolvedLink + "/idVendor")) continue;

                                        var usbFs = new FileStream(resolvedLink + "/descriptors",
                                            System.IO.FileMode.Open,
                                            System.IO.FileAccess.Read);
                                        var usbBuf = new byte[65536];
                                        var usbCount = usbFs.Read(usbBuf, 0, 65536);
                                        UsbDescriptors = new byte[usbCount];
                                        Array.Copy(usbBuf, 0, UsbDescriptors, 0, usbCount);
                                        usbFs.Close();

                                        var usbSr = new StreamReader(resolvedLink + "/idProduct");
                                        var usbTemp = usbSr.ReadToEnd();
                                        ushort.TryParse(usbTemp, NumberStyles.HexNumber, CultureInfo.InvariantCulture,
                                            out usbProduct);
                                        usbSr.Close();

                                        usbSr = new StreamReader(resolvedLink + "/idVendor");
                                        usbTemp = usbSr.ReadToEnd();
                                        ushort.TryParse(usbTemp, NumberStyles.HexNumber, CultureInfo.InvariantCulture,
                                            out usbVendor);
                                        usbSr.Close();

                                        if (File.Exists(resolvedLink + "/manufacturer"))
                                        {
                                            usbSr = new StreamReader(resolvedLink + "/manufacturer");
                                            UsbManufacturerString = usbSr.ReadToEnd().Trim();
                                            usbSr.Close();
                                        }

                                        if (File.Exists(resolvedLink + "/product"))
                                        {
                                            usbSr = new StreamReader(resolvedLink + "/product");
                                            UsbProductString = usbSr.ReadToEnd().Trim();
                                            usbSr.Close();
                                        }

                                        if (File.Exists(resolvedLink + "/serial"))
                                        {
                                            usbSr = new StreamReader(resolvedLink + "/serial");
                                            UsbSerialString = usbSr.ReadToEnd().Trim();
                                            usbSr.Close();
                                        }

                                        IsUsb = true;
                                        break;
                                    }
                                }
                            }
                        }

                        break;
                    case PlatformID.Win32NT:
                        Usb.UsbDevice usbDevice = null;

                        // I have to search for USB disks, floppies and CD-ROMs as separate device types
                        foreach (var devGuid in new[]
                        {
                            Usb.GuidDevinterfaceFloppy, Usb.GuidDevinterfaceCdrom, Usb.GuidDevinterfaceDisk
                        })
                        {
                            usbDevice = Usb.FindDrivePath(devicePath, devGuid);
                            if (usbDevice != null) break;
                        }

                        if (usbDevice != null)
                        {
                            UsbDescriptors = usbDevice.BinaryDescriptors;
                            usbVendor = (ushort) usbDevice.DeviceDescriptor.idVendor;
                            usbProduct = (ushort) usbDevice.DeviceDescriptor.idProduct;
                            UsbManufacturerString = usbDevice.Manufacturer;
                            UsbProductString = usbDevice.Product;
                            UsbSerialString =
                                usbDevice
                                    .SerialNumber; // This is incorrect filled by Windows with SCSI/ATA serial number
                        }

                        break;
                    default:
                        IsUsb = false;
                        break;
                }
            }
            else
            {
                if (remote.GetUsbData(out var remoteUsbDescriptors, out var remoteUsbVendor,
                    out var remoteUsbProduct, out var remoteUsbManufacturer, out var remoteUsbProductString,
                    out var remoteUsbSerial))
                {
                    IsUsb = true;
                    UsbDescriptors = remoteUsbDescriptors;
                    usbVendor = remoteUsbVendor;
                    usbProduct = remoteUsbProduct;
                    UsbManufacturerString = remoteUsbManufacturer;
                    UsbProductString = remoteUsbProductString;
                    UsbSerialString = remoteUsbSerial;
                }
            }

            #endregion USB

            #region FireWire

            if (!(remote is null))
            {
                if (remote.GetFireWireData(out firewireVendor, out firewireModel,
                    out firewireGuid, out var remoteFireWireVendorName, out var remoteFireWireModelName))
                {
                    IsFireWire = true;
                    FireWireVendorName = remoteFireWireVendorName;
                    FireWireModelName = remoteFireWireModelName;
                }
            }
            else
            {
                if (PlatformId == PlatformID.Linux)
                {
                    if (devicePath.StartsWith("/dev/sd", StringComparison.Ordinal) ||
                        devicePath.StartsWith("/dev/sr", StringComparison.Ordinal) ||
                        devicePath.StartsWith("/dev/st", StringComparison.Ordinal))
                    {
                        var devPath = devicePath.Substring(5);
                        if (Directory.Exists("/sys/block/" + devPath))
                        {
                            var resolvedLink = Linux.Command.ReadLink("/sys/block/" + devPath);
                            resolvedLink = "/sys" + resolvedLink.Substring(2);
                            if (!string.IsNullOrEmpty(resolvedLink))
                                while (resolvedLink.Contains("firewire"))
                                {
                                    resolvedLink = Path.GetDirectoryName(resolvedLink);
                                    if (!File.Exists(resolvedLink + "/model") ||
                                        !File.Exists(resolvedLink + "/vendor") ||
                                        !File.Exists(resolvedLink + "/guid")) continue;

                                    var fwSr = new StreamReader(resolvedLink + "/model");
                                    var fwTemp = fwSr.ReadToEnd();
                                    uint.TryParse(fwTemp, NumberStyles.HexNumber, CultureInfo.InvariantCulture,
                                        out firewireModel);
                                    fwSr.Close();

                                    fwSr = new StreamReader(resolvedLink + "/vendor");
                                    fwTemp = fwSr.ReadToEnd();
                                    uint.TryParse(fwTemp, NumberStyles.HexNumber, CultureInfo.InvariantCulture,
                                        out firewireVendor);
                                    fwSr.Close();

                                    fwSr = new StreamReader(resolvedLink + "/guid");
                                    fwTemp = fwSr.ReadToEnd();
                                    ulong.TryParse(fwTemp, NumberStyles.HexNumber, CultureInfo.InvariantCulture,
                                        out firewireGuid);
                                    fwSr.Close();

                                    if (File.Exists(resolvedLink + "/model_name"))
                                    {
                                        fwSr = new StreamReader(resolvedLink + "/model_name");
                                        FireWireModelName = fwSr.ReadToEnd().Trim();
                                        fwSr.Close();
                                    }

                                    if (File.Exists(resolvedLink + "/vendor_name"))
                                    {
                                        fwSr = new StreamReader(resolvedLink + "/vendor_name");
                                        FireWireVendorName = fwSr.ReadToEnd().Trim();
                                        fwSr.Close();
                                    }

                                    IsFireWire = true;
                                    break;
                                }
                        }
                    }
                }
                // TODO: Implement for other operating systems
                else
                {
                    IsFireWire = false;
                }
            }

            #endregion FireWire

            #region PCMCIA

            if (remote is null)
            {
                if (PlatformId == PlatformID.Linux)
                {
                    if (devicePath.StartsWith("/dev/sd", StringComparison.Ordinal) ||
                        devicePath.StartsWith("/dev/sr", StringComparison.Ordinal) ||
                        devicePath.StartsWith("/dev/st", StringComparison.Ordinal))
                    {
                        var devPath = devicePath.Substring(5);
                        if (Directory.Exists("/sys/block/" + devPath))
                        {
                            var resolvedLink = Linux.Command.ReadLink("/sys/block/" + devPath);
                            resolvedLink = "/sys" + resolvedLink.Substring(2);
                            if (!string.IsNullOrEmpty(resolvedLink))
                                while (resolvedLink.Contains("/sys/devices"))
                                {
                                    resolvedLink = Path.GetDirectoryName(resolvedLink);
                                    if (!Directory.Exists(resolvedLink + "/pcmcia_socket")) continue;

                                    var subdirs = Directory.GetDirectories(resolvedLink + "/pcmcia_socket",
                                        "pcmcia_socket*",
                                        SearchOption.TopDirectoryOnly);

                                    if (subdirs.Length <= 0) continue;

                                    var possibleDir = Path.Combine(resolvedLink, "pcmcia_socket", subdirs[0]);
                                    if (!File.Exists(possibleDir + "/card_type") || !File.Exists(possibleDir + "/cis"))
                                        continue;

                                    var cisFs = new FileStream(possibleDir + "/cis", System.IO.FileMode.Open,
                                        System.IO.FileAccess.Read);
                                    var cisBuf = new byte[65536];
                                    var cisCount = cisFs.Read(cisBuf, 0, 65536);
                                    Cis = new byte[cisCount];
                                    Array.Copy(cisBuf, 0, Cis, 0, cisCount);
                                    cisFs.Close();

                                    IsPcmcia = true;
                                    break;
                                }
                        }
                    }
                }
                // TODO: Implement for other operating systems
                else
                {
                    IsPcmcia = false;
                }
            }
            else
            {
                if (remote.GetPcmciaData(out var cisBuf))
                {
                    IsPcmcia = true;
                    Cis = cisBuf;
                }
            }

            #endregion PCMCIA

            if (!scsiSense)
            {
                var inquiry = Inquiry.Decode(inqBuf);

                Type = DeviceType.SCSI;
                var serialSense = ScsiInquiry(out inqBuf, out _, 0x80);
                if (!serialSense) Serial = EVPD.DecodePage80(inqBuf);

                if (inquiry.HasValue)
                {
                    var tmp = StringHandlers.CToString(inquiry.Value.ProductRevisionLevel);
                    if (tmp != null) Revision = tmp.Trim();
                    tmp = StringHandlers.CToString(inquiry.Value.ProductIdentification);
                    if (tmp != null) Model = tmp.Trim();
                    tmp = StringHandlers.CToString(inquiry.Value.VendorIdentification);
                    if (tmp != null) Manufacturer = tmp.Trim();
                    IsRemovable = inquiry.Value.RMB;

                    ScsiType = (PeripheralDeviceTypes) inquiry.Value.PeripheralDeviceType;
                }

                var atapiSense = AtapiIdentify(out ataBuf, out _);

                if (!atapiSense)
                {
                    Type = DeviceType.ATAPI;
                    var ataId = Identify.Decode(ataBuf);

                    if (ataId.HasValue) Serial = ataId.Value.SerialNumber;
                }

                LastError = 0;
                Error = false;
            }

            if (scsiSense && (IsUsb || IsFireWire) || Manufacturer == "ATA")
            {
                var ataSense = AtaIdentify(out ataBuf, out _);
                if (!ataSense)
                {
                    Type = DeviceType.ATA;
                    var ataid = Identify.Decode(ataBuf);

                    if (ataid.HasValue)
                    {
                        var separated = ataid.Value.Model.Split(' ');

                        if (separated.Length == 1)
                        {
                            Model = separated[0];
                        }
                        else
                        {
                            Manufacturer = separated[0];
                            Model = separated[separated.Length - 1];
                        }

                        Revision = ataid.Value.FirmwareRevision;
                        Serial = ataid.Value.SerialNumber;

                        ScsiType = PeripheralDeviceTypes.DirectAccess;

                        if ((ushort) ataid.Value.GeneralConfiguration != 0x848A)
                            IsRemovable |=
                                (ataid.Value.GeneralConfiguration & Identify.GeneralConfigurationBit.Removable) ==
                                Identify.GeneralConfigurationBit.Removable;
                        else IsCompactFlash = true;
                    }
                }
            }

            if (Type == DeviceType.Unknown)
            {
                Manufacturer = null;
                Model = null;
                Revision = null;
                Serial = null;
            }

            if (IsUsb)
            {
                if (string.IsNullOrEmpty(Manufacturer)) Manufacturer = UsbManufacturerString;
                if (string.IsNullOrEmpty(Model)) Model = UsbProductString;
                if (string.IsNullOrEmpty(Serial)) Serial = UsbSerialString;
                else
                    foreach (var c in Serial.Where(char.IsControl))
                        Serial = UsbSerialString;
            }

            if (IsFireWire)
            {
                if (string.IsNullOrEmpty(Manufacturer)) Manufacturer = FireWireVendorName;
                if (string.IsNullOrEmpty(Model)) Model = FireWireModelName;
                if (string.IsNullOrEmpty(Serial)) Serial = $"{firewireGuid:X16}";
                else
                    foreach (var c in Serial.Where(char.IsControl))
                        Serial = $"{firewireGuid:X16}";
            }

            // Some optical drives are not getting the correct serial, and IDENTIFY PACKET DEVICE is blocked without
            // administrator privileges
            if (ScsiType != PeripheralDeviceTypes.MultiMediaDevice) return;

            var featureSense = GetConfiguration(out var featureBuffer, out _, 0x0108, MmcGetConfigurationRt.Single,
                Timeout, out _);

            if (featureSense) return;

            var features = Features.Separate(featureBuffer);
            if (features.Descriptors?.Length != 1 || features.Descriptors[0].Code != 0x0108) return;

            var serialFeature = Features.Decode_0108(features.Descriptors[0].Data);

            if (serialFeature is null) return;

            Serial = serialFeature.Value.Serial;
        }

        private static int ConvertFromHexAscii(string file, out byte[] outBuf)
        {
            var sr = new StreamReader(file);
            var ins = sr.ReadToEnd().Trim();
            outBuf = new byte[ins.Length / 2];
            var count = 0;

            try
            {
                for (var i = 0; i < ins.Length; i += 2)
                {
                    outBuf[i / 2] = Convert.ToByte(ins.Substring(i, 2), 16);
                    count++;
                }
            }
            catch
            {
                count = 0;
            }

            sr.Close();
            return count;
        }
    }
}