llc.py 文件源码

def listen(self, socket, backlog):
        if not isinstance(socket, tco.TransmissionControlObject):
            raise err.Error(errno.ENOTSOCK)
        if not isinstance(socket, tco.DataLinkConnection):
            raise err.Error(errno.EOPNOTSUPP)
        if not isinstance(backlog, int):
            raise TypeError("backlog must be int type")
        if backlog < 0:
            raise ValueError("backlog can not be negative")
        backlog = min(backlog, 16)
        if not socket.is_bound:
            self.bind(socket)
        socket.listen(backlog)