toRawSocket abstract method
Extracts opened raw socket from resource handle.
Since the ResourceHandle represents a single OS resource, none of toFile, toSocket, toRawSocket, or toRawDatagramSocket, toReadPipe, toWritePipe, can be called after a call to this method.
If this resource handle is not a socket handle, the behavior of the returned RawSocket is completely unspecified. Be very careful to avoid using a handle incorrectly.