tco.py 文件源码

def recvfrom(self):
        if self.state.SHUTDOWN:
            raise err.Error(errno.ESHUTDOWN)
        try:
            rcvd_pdu = super(LogicalDataLink, self).recv()
        except IndexError:
            raise err.Error(errno.EPIPE)
        return (rcvd_pdu.data, rcvd_pdu.ssap) if rcvd_pdu else (None, None)