#!/bin/bash
#------------------------------------
#------------------------------------
# Functions of this programe:
# Prospect the access point address once every one minute(command:crontab).
# If any difference occures,
# it will post the ping command on the server
# and if packet loss rate reaches 100%,
# it will restart the network.
#-----------------------------------
#-----------------------------------
/sbin/iwconfig eth0|grep Point|awk '{print $5}' > /home/mac_new 2>/dev/null
if [ `cat /home/mac_new` = `cat /home/mac_old` 2>/dev/null ]
then
echo `date`>>/home/iwconfig_mac.log
echo same_mac>>/home/iwconfig_mac.log
else
(
echo `date`>>/home/iwconfig_mac.log
echo different_mac>>/home/iwconfig_mac.log
cat /home/mac_new > /home/mac_old 2>/dev/null
i=1
for loop in 1 2
do
(
i=$(($i+1))
if [ `ping -c 3 12.0.0.1|grep loss|awk '{print $7}'` < "100%" 2>/dev/null ]
then
echo `date`>>/home/netstate.log
echo "packet loss < 100%">>/home/netstate.log
else
echo `date`>>/home/netstate.log
echo "packet loss = 100%">>/home/netstate.log
/etc/rc.d/init.d/network restart >> /home/netstate.log 2>/dev/null
fi
)
done
)
fi
----------------------
----------------------
crontab:
* * * * * /home/netwk
* * * * * (sleep 30 && /home/netwk)[@more@]