"Steve" <St***@discussions.microsoft.com> wrote in message
news:82**********************************@microsof t.com...
All,
Thanks for the help about this issue.
Willy,
I think you answer my question, for I am new in C#, I will try figure out
how to implement based on your suggestion, really appreciated.
"Willy Denoyette [MVP]" wrote:
Steve,
I would never use C# for this, but here's a sample class that illustrates
how to manage driver loading/unloading using both PInvoke interop and WMI.
Note this is no production code, it's only meant to illustrate how to:
- load a driver.
- start the driver
- open the device
- stop the driver
- unload the driver
using C#.
usage:
Win32Driver driver = new Win32Driver(driverName,
@"c:\\folder\\mydriver.sys");
if (driver.LoadDeviceDriver()){
IntPtr handle = driver.OpenDevice();
// use device using ....DeviceIoControl(handle,....) see class code for
signature
}
//unload when done
driver.UnloadDeviceDriver();
// the class file
public sealed class Win32Driver : IDisposable
{
string driverName;
string execPath;
IntPtr fileHandle;
public Win32Driver(string driver, string driverExecPath)
{
this.driverName = driver;
this.execPath = driverExecPath;
}
~Win32Driver()
{
// BUG - should never rely on finalizer to clean-up unmanaged resources
Dispose();
}
private void CloseStuff()
{
if(fileHandle != INVALID_HANDLE_VALUE)
{
fileHandle = INVALID_HANDLE_VALUE;
CloseHandle(fileHandle);
}
}
public void Dispose()
{
CloseStuff();
GC.SuppressFinalize(this);
}
private readonly static IntPtr INVALID_HANDLE_VALUE = new IntPtr(-1);
private const int STANDARD_RIGHTS_REQUIRED = 0x000F0000;
private const int SC_MANAGER_CONNECT = 0x0001;
private const int SC_MANAGER_CREATE_SERVICE = 0x0002;
private const int SC_MANAGER_ENUMERATE_SERVICE = 0x0004;
private const int SC_MANAGER_LOCK = 0x0008;
private const int SC_MANAGER_QUERY_LOCK_STATUS = 0x0010;
private const int SC_MANAGER_MODIFY_BOOT_CONFIG =0x0020;
private const int SC_MANAGER_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED |
SC_MANAGER_CONNECT |
SC_MANAGER_CREATE_SERVICE |
SC_MANAGER_ENUMERATE_SERVICE |
SC_MANAGER_LOCK |
SC_MANAGER_QUERY_LOCK_STATUS |
SC_MANAGER_MODIFY_BOOT_CONFIG;
private const int SERVICE_QUERY_CONFIG = 0x0001;
private const int SERVICE_CHANGE_CONFIG = 0x0002;
private const int SERVICE_QUERY_STATUS = 0x0004;
private const int SERVICE_ENUMERATE_DEPENDENTS = 0x0008;
private const int SERVICE_START = 0x0010;
private const int SERVICE_STOP = 0x0020;
private const int SERVICE_PAUSE_CONTINUE = 0x0040;
private const int SERVICE_INTERROGATE = 0x0080;
private const int SERVICE_USER_DEFINED_CONTROL = 0x0100;
private const int SERVICE_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED
|
SERVICE_QUERY_CONFIG |
SERVICE_CHANGE_CONFIG |
SERVICE_QUERY_STATUS |
SERVICE_ENUMERATE_DEPENDENTS |
SERVICE_START |
SERVICE_STOP |
SERVICE_PAUSE_CONTINUE |
SERVICE_INTERROGATE |
SERVICE_USER_DEFINED_CONTROL;
private const int SERVICE_DEMAND_START = 0x00000003;
private const int SERVICE_KERNEL_DRIVER = 0x00000001;
private const int SERVICE_ERROR_NORMAL = 0x00000001;
private const uint GENERIC_READ = 0x80000000;
private const uint FILE_SHARE_READ = 1;
private const uint FILE_SHARE_WRITE = 2;
private const uint OPEN_EXISTING = 3;
private const uint IOCTL_SHOCKMGR_READ_ACCELEROMETER_DATA = 0x733fc;
private const int FACILITY_WIN32 = unchecked((int)0x80070000);
private IntPtr handle = INVALID_HANDLE_VALUE;
[DllImport("advapi32", SetLastError = true)]
internal static extern IntPtr OpenSCManager(string machineName, string
databaseName, uint dwDesiredAccess);
[DllImport("advapi32", SetLastError = true)]
internal static extern IntPtr CreateService(IntPtr hSCManager, string
serviceName, string displayName,
uint dwDesiredAccess, uint serviceType, uint startType, uint
errorControl,
string lpBinaryPathName, string lpLoadOrderGroup, string lpdwTagId,
string lpDependencies,
string lpServiceStartName, string lpPassword);
[DllImport("advapi32")]
internal static extern bool CloseServiceHandle(IntPtr handle);
[DllImport("kernel32", SetLastError = true)]
internal static extern IntPtr CreateFile(string lpFileName, uint
dwDesiredAccess, uint dwShareMode, IntPtr lpSecurityAttributes, uint
dwCreationDisposition, uint dwFlagsAndAttributes, IntPtr hTemplateFile);
[DllImport("kernel32")]
internal static extern void CloseHandle(IntPtr handle);
[DllImport("kernel32", SetLastError = true)]
private static extern bool DeviceIoControl(IntPtr hDevice, uint
dwIoControlCode, IntPtr lpInBuffer, uint nInBufferSize, IntPtr lpOutBuffer,
uint nOutBufferSize, ref uint lpBytesReturned, IntPtr lpOverlapped);
internal bool LoadDeviceDriver()
{
IntPtr scHandle = OpenSCManager(null, null, SC_MANAGER_ALL_ACCESS);
if (scHandle != INVALID_HANDLE_VALUE)
{
IntPtr hService = CreateService(scHandle, this.driverName,
this.driverName, SERVICE_ALL_ACCESS
, SERVICE_KERNEL_DRIVER, SERVICE_DEMAND_START,SERVICE_ERROR_NORMAL
,execPath, null, null, null, null, null);
if (hService != IntPtr.Zero)
{
CloseServiceHandle(hService); // close both handles
CloseServiceHandle(scHandle);
// Start the driver using System.Management (WMI)
if (ExecuteSCMOperationOnDriver(this.driverName, "StartService") == 0)
return true;
}
else
if (Marshal.GetLastWin32Error()== 1073) // Driver/Service already in DB
{
CloseServiceHandle(scHandle);
// Start the driver using System.Management (WMI)
if (ExecuteSCMOperationOnDriver(this.driverName, "StartService") == 0)
return true;
}
Marshal.ThrowExceptionForHR(HRESULT_FROM_WIN32(Mar shal.GetLastWin32Error()));
}
return false;
}
internal bool UnloadDeviceDriver()
{
int ret = 0;
if (fileHandle != IntPtr.Zero && fileHandle != INVALID_HANDLE_VALUE)
{
CloseHandle(fileHandle);
}
if ((ret = ExecuteSCMOperationOnDriver(driverName, "StopService")) == 0)
{
ret = ExecuteSCMOperationOnDriver(driverName, "Delete");
}
if (ret != 0)
{
return false;
}
return true;
}
private static int ExecuteSCMOperationOnDriver(string driverName, string
operation)
{
ManagementPath path = new ManagementPath();
path.Server = ".";
path.NamespacePath = @"root\CIMV2";
path.RelativePath = @"Win32_BaseService.Name='" + driverName +"'";
using(ManagementObject o = new ManagementObject(path))
{
ManagementBaseObject outParams = o.InvokeMethod(operation,
null, null);
return Convert.ToInt32(outParams.Properties["ReturnValue"].Value);
}
}
internal IntPtr OpenDevice()
{
fileHandle = CreateFile("\\\\.\\" + driverName, GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE, IntPtr.Zero, OPEN_EXISTING, 0,
IntPtr.Zero);
if(handle == INVALID_HANDLE_VALUE)
{
Marshal.ThrowExceptionForHR(HRESULT_FROM_WIN32(Mar shal.GetLastWin32Error()));
}
return fileHandle;
}
private static int HRESULT_FROM_WIN32(int x)
{
return x <= 0 ? x : ((x & 0x0000FFFF) | FACILITY_WIN32);
}
}
