def is_uplink_received(self):
return self.restart_uplink_called<EOL>
Returns whether uplink information is received after restart.

        Not protecting this with a mutex, since this gets called inside the
        loop from dfa_agent and having a mutex is a overkill. Worst case,
        during multiple restarts on server and when the corner case is hit,
        this may return an incorrect value of False when _dfa_uplink_restart
        is at the middle of execution. Returning an incorrect value of False,
        may trigger an RPC to the server to retrieve the uplink one extra time.
        _dfa_uplink_restart will not get executed twice, since that is anyway
        protected with a mutex.