private int SendNetifLevel3Output(byte *buffer, int offset, int length)
{
if (offset < 0 || length < 0)
{
return(~0);
}
if (buffer == null)
{
int num = (offset + length);
if (0 == num)
{
return(0);
}
return(~0);
}
lock (this)
{
NativeNetif.OVERLAPPED *overlapped = stackalloc NativeNetif.OVERLAPPED[1];
NativeNetif.memset(overlapped, 0, sizeof(NativeNetif.OVERLAPPED));
if (!NativeNetif.WriteFile(this.Handle, &buffer[offset], length, out int lpNumberOfBytesWritten, overlapped))
{
lpNumberOfBytesWritten = 0;
if (!NativeNetif.GetOverlappedResult(this.Handle, overlapped, ref lpNumberOfBytesWritten, true))
{
lpNumberOfBytesWritten = ~0;
}
}
return(lpNumberOfBytesWritten);
}
}
private void CloseTunDev(IntPtr handle)
{
if (handle != IntPtr.Zero)
{
NativeNetif.CloseHandle(handle);
}
}
private void ListenNetifLevel3Input(Action <byte[], int> callback)
{
NativeNetif.OVERLAPPED *overlapped = stackalloc NativeNetif.OVERLAPPED[1];
byte[] buffer = new byte[MTU];
while (0 == Interlocked.CompareExchange(ref this._disposed, 0, 0))
{
NativeNetif.memset(overlapped, 0, sizeof(NativeNetif.OVERLAPPED));
int nNumberOfBytesToRead = 0;
if (!NativeNetif.ReadFile(this.Handle, buffer, MTU, ref nNumberOfBytesToRead, ref *overlapped))
{
if (!NativeNetif.GetOverlappedResult(this.Handle, overlapped, ref nNumberOfBytesToRead, true))
{
callback?.Invoke(buffer, ~0);
break;
}
}
callback?.Invoke(buffer, nNumberOfBytesToRead);
}
}
protected bool DeviceIoControl(uint commands, byte[] contents)
{
IntPtr hEvent = NativeNetif.CreateEvent(IntPtr.Zero, false, false, null);
try
{
NativeNetif.OVERLAPPED overlapped = new NativeNetif.OVERLAPPED();
overlapped.hEvent = hEvent;
uint dw = 0;
uint content_size = 0;
if (contents == null)
{
if (!NativeNetif.DeviceIoControl(this.Handle, commands,
contents, 0, contents, 0, ref dw, ref overlapped))
{
NativeNetif.WaitForSingleObject(hEvent, Timeout.Infinite);
return(overlapped.Internal == NativeNetif.ERROR_SUCCESS);
}
}
else
{
content_size = (uint)contents.Length;
if (!NativeNetif.DeviceIoControl(this.Handle, commands,
contents, content_size, contents, content_size, ref dw, ref overlapped))
{
NativeNetif.WaitForSingleObject(hEvent, Timeout.Infinite);
return(overlapped.Internal == NativeNetif.ERROR_SUCCESS);
}
}
return(true);
}
finally
{
if (hEvent != IntPtr.Zero)
{
NativeNetif.CloseHandle(hEvent);
}
}
}
private IntPtr OpenTunDev(string componentId)
{
string devName = $"\\\\.\\Global\\{componentId}.tap";
return(NativeNetif.OpenDrive(devName));
}
public static ISet <string> FindAllComponentId()
{
ISet <string> s = NativeNetif.FindAllComponentId();
return(s);
}
