private static byte[] _SendCommand(SafeFileHandle handle, byte[] cmd, byte[] data, int bytesExpected)
{
const int IOCTL_SCSI_PASS_THROUGH_DIRECT = 0x4D014;
const int TIMEOUT_SECS = 30;
SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER scsi = null;
IntPtr inBuffer = IntPtr.Zero;
byte[] ret = null;
try
{
scsi = new SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER();
scsi.sptd.Length = (short)Marshal.SizeOf(scsi.sptd);
scsi.sptd.TimeOutValue = TIMEOUT_SECS;
scsi.sptd.SenseInfoOffset = (uint)Marshal.OffsetOf(typeof(SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER), "sense");
scsi.sptd.SenseInfoLength = (byte)scsi.sense.Length;
scsi.sptd.CdbLength = (byte)cmd.Length;
Array.Copy(cmd, scsi.sptd.Cdb, cmd.Length);
scsi.sptd.DataIn = data != null && data.Length > 0 ? SCSI_IOCTL_DATA_OUT : SCSI_IOCTL_DATA_IN;
scsi.sptd.DataTransferLength = data != null && data.Length > 0 ? data.Length : bytesExpected;
scsi.sptd.DataBuffer = Marshal.AllocHGlobal(scsi.sptd.DataTransferLength);
if (data != null && data.Length > 0)
{
Marshal.Copy(data, 0, scsi.sptd.DataBuffer, data.Length);
}
uint bytesReturned;
inBuffer = Marshal.AllocHGlobal(Marshal.SizeOf(scsi));
var size = (uint)Marshal.SizeOf(scsi);
Marshal.StructureToPtr(scsi, inBuffer, false);
if (!DeviceIoControl(handle.DangerousGetHandle(), IOCTL_SCSI_PASS_THROUGH_DIRECT,
inBuffer, size, inBuffer, size, out bytesReturned, IntPtr.Zero))
{
//Whoops, do something with the error code
int last = Marshal.GetLastWin32Error();
throw new InvalidOperationException("DeviceIoControl failed: " + last.ToString("X04"));
}
else
{
if (scsi.sptd.ScsiStatus != 0)
{
//Whoops, do something with the error code
throw new InvalidOperationException("SCSI command failed: " + scsi.sptd.ScsiStatus.ToString("X02"));
}
else
{
//Success, marshal back any data we received
if (scsi.sptd.DataTransferLength > 0)
{
ret = new byte[scsi.sptd.DataTransferLength];
Marshal.Copy(scsi.sptd.DataBuffer, ret, 0, ret.Length);
}
}
}
}
finally
{
/* Free any unmanaged resources */
if (scsi != null && scsi.sptd.DataBuffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(scsi.sptd.DataBuffer);
}
if (inBuffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(inBuffer);
}
}
return(ret);
}
private static byte[] _SendCommand(SafeFileHandle handle, byte[] cmd, byte[] data, int bytesExpected)
{
const int IOCTL_SCSI_PASS_THROUGH_DIRECT = 0x4D014;
const int TIMEOUT_SECS = 30;
SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER scsi = null;
IntPtr inBuffer = IntPtr.Zero;
byte[] ret = null;
try
{
scsi = new SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER();
scsi.sptd.Length = (short)Marshal.SizeOf(scsi.sptd);
scsi.sptd.TimeOutValue = TIMEOUT_SECS;
scsi.sptd.SenseInfoOffset = (uint)Marshal.OffsetOf(typeof(SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER), "sense");
scsi.sptd.SenseInfoLength = (byte)scsi.sense.Length;
scsi.sptd.CdbLength = (byte)cmd.Length;
Array.Copy(cmd, scsi.sptd.Cdb, cmd.Length);
scsi.sptd.DataIn = data != null && data.Length > 0 ? SCSI_IOCTL_DATA_OUT : SCSI_IOCTL_DATA_IN;
scsi.sptd.DataTransferLength = data != null && data.Length > 0 ? data.Length : bytesExpected;
scsi.sptd.DataBuffer = Marshal.AllocHGlobal(scsi.sptd.DataTransferLength);
if (data != null && data.Length > 0)
{
Marshal.Copy(data, 0, scsi.sptd.DataBuffer, data.Length);
}
uint bytesReturned;
inBuffer = Marshal.AllocHGlobal(Marshal.SizeOf(scsi));
var size = (uint)Marshal.SizeOf(scsi);
Marshal.StructureToPtr(scsi, inBuffer, false);
if (!DeviceIoControl(handle.DangerousGetHandle(), IOCTL_SCSI_PASS_THROUGH_DIRECT,
inBuffer, size, inBuffer, size, out bytesReturned, IntPtr.Zero))
{
//Whoops, do something with the error code
int last = Marshal.GetLastWin32Error();
throw new InvalidOperationException("DeviceIoControl failed: " + last.ToString("X04"));
}
else
{
if (scsi.sptd.ScsiStatus != 0)
{
//Whoops, do something with the error code
throw new InvalidOperationException("SCSI command failed: " + scsi.sptd.ScsiStatus.ToString("X02"));
}
else
{
//Success, marshal back any data we received
if (scsi.sptd.DataTransferLength > 0)
{
ret = new byte[scsi.sptd.DataTransferLength];
Marshal.Copy(scsi.sptd.DataBuffer, ret, 0, ret.Length);
}
}
}
}
finally
{
/* Free any unmanaged resources */
if (scsi != null && scsi.sptd.DataBuffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(scsi.sptd.DataBuffer);
}
if (inBuffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(inBuffer);
}
}
return ret;
}
