Transport thread loop.

def run(self):
        """Transport thread loop."""
        # pylint: disable=broad-except
        self.protocol = self.protocol_factory()
        try:
            self.protocol.connection_made(self)
        except Exception as exc:
            self.alive = False
            self.protocol.connection_lost(exc)
            self._connection_made.set()
            return
        error = None
        self._connection_made.set()
        while self.alive:
            data = None
            try:
                available_socks = self._check_socket()
                if available_socks[0]:
                    data = self.sock.recv(120)
            except Exception as exc:
                error = exc
                break
            else:
                if data:
                    try:
                        self.protocol.data_received(data)
                    except Exception as exc:
                        error = exc
                        break
            try:
                self._check_connection()
            except OSError as exc:
                error = exc
                break
            time.sleep(0.02)  # short sleep to avoid burning 100% cpu
        self.alive = False
        self.protocol.connection_lost(error)
        self.protocol = None