public bool USBSCSIWrite(byte[] pCDB, int nCDBLen, byte[] pData, uint nLength, uint nTimeOut)
{
try
{
bool status = false;
ScsiPassThroughDirectWithBuffers sptdwb;
int length = 0;
uint TransLen;
uint returned = 0;
IntPtr w_pBuf;
IntPtr w_pData;
if (m_hHandle.IsInvalid)
{
return(false);
}
TransLen = nLength;
w_pData = Marshal.AllocHGlobal((int)nLength);
Marshal.Copy(pData, 0, w_pData, (int)nLength);
sptdwb = new ScsiPassThroughDirectWithBuffers(1, 0, 0, 6 /*CDB6GENERIC_LENGTH*/, TransLen);
sptdwb.spt.DataIn = 0; //SCSI_IOCTL_DATA_OUT
sptdwb.spt.TimeOutValue = nTimeOut;
sptdwb.spt.DataBuffer = w_pData;
Array.Copy(pCDB, sptdwb.spt.Cdb, nCDBLen);
length = Marshal.SizeOf(sptdwb);
w_pBuf = Marshal.AllocHGlobal(length);
Marshal.StructureToPtr(sptdwb, w_pBuf, false);
status = DeviceIoControl(m_hHandle,
IOCTL_SCSI_PASS_THROUGH_DIRECT,
w_pBuf,
(uint)length,
w_pBuf,
(uint)length,
ref returned,
IntPtr.Zero);
Marshal.PtrToStructure(w_pBuf, sptdwb);
if (status == false)
{
length = Marshal.GetLastWin32Error();
}
Marshal.FreeHGlobal(w_pBuf);
Marshal.FreeHGlobal(w_pData);
return(status);
}
catch {
return(false);
}
}
public bool CallDeviceIoControl(SafeFileHandle volume, ref byte[] data, byte command, byte LBA, byte secCount, byte dataInOut)
{
ScsiPassThroughDirectWithBuffers sptdwb = new ScsiPassThroughDirectWithBuffers();
sptdwb.Init(command, LBA, secCount, dataInOut);
IntPtr input = IntPtr.Zero;
IntPtr unmanagedPointer = Marshal.AllocHGlobal(data.Length);
Marshal.Copy(data, 0, unmanagedPointer, data.Length);
sptdwb.spt.DataBuffer = unmanagedPointer;
uint length = (uint)Marshal.SizeOf(typeof(ScsiPassThroughDirectWithBuffers));
uint bytesreturned = 0;
uint ioctl_scsi_base = 0x00000004;
uint function = 0x0405;
uint method = 0;
uint access = 0x0001 | 0x0002;
uint ioControlCode = CTL_CODE(ioctl_scsi_base, function, method, access);
bool status = false;
IntPtr ptr = Marshal.AllocHGlobal((int)length);
Marshal.StructureToPtr(sptdwb, ptr, false);
try
{
status = DeviceIoControl(volume, ioControlCode, ptr, length, ptr, length, out bytesreturned, IntPtr.Zero);
if (status)
{
if (dataInOut == 1)
{
Marshal.Copy(sptdwb.spt.DataBuffer, data, 0, data.Length);
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
Marshal.FreeHGlobal(unmanagedPointer);
}
return status;
}
