/// <summary>Sends a SCSI command</summary>
/// <returns>0 if no error occurred, otherwise, errno</returns>
/// <param name="fd">File handle</param>
/// <param name="cdb">SCSI CDB</param>
/// <param name="buffer">Buffer for SCSI command response</param>
/// <param name="senseBuffer">Buffer with the SCSI sense</param>
/// <param name="timeout">Timeout in seconds</param>
/// <param name="direction">SCSI command transfer direction</param>
/// <param name="duration">Time it took to execute the command in milliseconds</param>
/// <param name="sense">
/// <c>True</c> if SCSI error returned non-OK status and <paramref name="senseBuffer" /> contains SCSI
/// sense
/// </param>
internal static int SendScsiCommand(SafeFileHandle fd, byte[] cdb, ref byte[] buffer, out byte[] senseBuffer,
uint timeout, ScsiIoctlDirection direction, out double duration,
out bool sense)
{
senseBuffer = null;
duration = 0;
sense = false;
if (buffer == null)
{
return(-1);
}
var sptdSb = new ScsiPassThroughDirectAndSenseBuffer
{
SenseBuf = new byte[32], sptd = new ScsiPassThroughDirect
{
Cdb = new byte[16], CdbLength = (byte)cdb.Length, SenseInfoLength = 32,
DataIn = direction,
DataTransferLength = (uint)buffer.Length, TimeOutValue = timeout,
DataBuffer = Marshal.AllocHGlobal(buffer.Length)
}
};
sptdSb.sptd.Length = (ushort)Marshal.SizeOf(sptdSb.sptd);
sptdSb.sptd.SenseInfoOffset = (uint)Marshal.SizeOf(sptdSb.sptd);
Array.Copy(cdb, sptdSb.sptd.Cdb, cdb.Length);
uint k = 0;
int error = 0;
Marshal.Copy(buffer, 0, sptdSb.sptd.DataBuffer, buffer.Length);
DateTime start = DateTime.Now;
bool hasError = !Extern.DeviceIoControlScsi(fd, WindowsIoctl.IoctlScsiPassThroughDirect, ref sptdSb,
(uint)Marshal.SizeOf(sptdSb), ref sptdSb,
(uint)Marshal.SizeOf(sptdSb), ref k, IntPtr.Zero);
DateTime end = DateTime.Now;
if (hasError)
{
error = Marshal.GetLastWin32Error();
}
Marshal.Copy(sptdSb.sptd.DataBuffer, buffer, 0, buffer.Length);
sense |= sptdSb.sptd.ScsiStatus != 0;
senseBuffer = new byte[32];
Array.Copy(sptdSb.SenseBuf, senseBuffer, 32);
duration = (end - start).TotalMilliseconds;
Marshal.FreeHGlobal(sptdSb.sptd.DataBuffer);
return(error);
}
internal static extern bool DeviceIoControlScsi(SafeFileHandle hDevice, WindowsIoctl ioControlCode,
ref ScsiPassThroughDirectAndSenseBuffer inBuffer,
uint nInBufferSize,
ref ScsiPassThroughDirectAndSenseBuffer outBuffer,
uint nOutBufferSize, ref uint pBytesReturned,
IntPtr overlapped);
