reboot router automatically

router.sh

#!/bin/bash

retval=1
testInternet(){
    sleep 10
    wget -q --tries=10 --timeout=20 --spider http://www.baidu.com
    date
    if [[ $? -eq 0 ]]; then
            retval=1
            echo "Online!"
    else
            retval=0
            echo "Offline!"
    fi
}

while [ "$retval" == 1 ]; do
    testInternet
    if [ "$retval" != 1 ]
    then
        curl --user 1:1 http://192.168.1.1/userRpm/SysRebootRpm.htm?Reboot=Reboot >/dev/null 2>&1
        sleep 180
    fi
    retval=1
done