Receiving loop

        :rtype: None

def _receiving(self):
        """
        Receiving loop

        :rtype: None
        """
        while self._is_running:
            try:
                rlist, wlist, xlist = select.select(
                    self._listening, [], [],
                    self._select_timeout
                )
            except:
                self.exception("Failed to select socket")
                continue
            for sock in rlist:
                try:
                    self._get_packet(sock)
                except:
                    self.exception("Failed to receive packet")