Waiting until network enabled

If I have something to do when the host launched and it requires network, I have to consider that network access not prepared when the something invoked. It is useful to wait network preparation completed. This is a sample.

while true;
do
    GW_CHECK=`netstat -rn -f inet | grep default | wc -l`;
    if [ 0 -ne $GW_CHECK ];then
	echo "Network Access enabled, proceed next step.";
	break;
    else
	echo "Network Access not enabled yet, waiting 1 seconds.";
	sleep 1;
    fi
done

# Something I would like to do should be written below