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 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);
}
}