public void Open(string filter, DivertLayer layer, short priority, DivertFlags flags)
{
if (String.IsNullOrWhiteSpace(filter))
{
throw new ArgumentNullException("filter");
}
ulong m_flag = Convert.ToUInt64(flags);
WINDIVERT_LAYER m_layer = (WINDIVERT_LAYER)layer;
_divert_handle = NativeMethods.WinDivertOpen(filter, m_layer, priority, m_flag);
int lastWin32Error = Marshal.GetLastWin32Error();
if (_divert_handle.IsInvalid)
{
switch (lastWin32Error)
{
case WinError.ERROR_FILE_NOT_FOUND:
throw new Exception("The driver files WinDivert32.sys or WinDivert64.sys were not found.");
case WinError.ERROR_ACCESS_DENIED:
throw new Exception("You don't have sufficent privilege to use the driver.");
case WinError.ERROR_INVALID_PARAMETER:
throw new Exception("Filter string, layer, priority, or flags parameters contain invalid values.");
case WinError.ERROR_INVALID_IMAGE_HASH:
throw new Exception("The WinDivert32.sys or WinDivert64.sys driver does not have a valid digital signature.");
case WinError.ERROR_DRIVER_BLOCKED:
throw new Exception("The driver is blocked from operating. This can happen for various reasons, such as interference from security software, or usage inside a virtualization environment that does not support drivers.");
default:
throw new Exception("Failed to open WinDivert safe handle. Cause is unknown. Win32 Error is " + lastWin32Error);
}
}
}
public static extern bool WinDivertHelperEvalFilter([In][MarshalAs(UnmanagedType.LPStr)] string filter, WINDIVERT_LAYER layer, [In] byte[] pPacket, uint packetLen, [In] ref WINDIVERT_ADDRESS pAddr);
public static extern bool WinDivertHelperCheckFilter([In][MarshalAs(UnmanagedType.LPStr)] string filter, WINDIVERT_LAYER layer, ref IntPtr errorStr, IntPtr errorPos);
public static extern IntPtr WinDivertOpen([In][MarshalAs(UnmanagedType.LPStr)] string filter, WINDIVERT_LAYER layer, short priority, ulong flags);
private extern static UIntPtr WinDivertOpen(string filter, WINDIVERT_LAYER layer,
Int16 prio, WINDIVERT_FLAG flags);
internal static extern System.IntPtr WinDivertOpen([In][MarshalAs(UnmanagedType.LPStr)] System.String filter,
[In] WINDIVERT_LAYER layer,
[In] System.Int16 priority,
[In] System.UInt64 flags);
public static extern DivertSafeHandle WinDivertOpen([InAttribute(), MarshalAs(UnmanagedType.LPStr)] string filter,
WINDIVERT_LAYER layer, short priority, ulong flags);
