Ubuntu - [1488] :: UNIX :: Компьютерный форум Ru.Board

#!/bin/bash

log="/var/log/routing.log"
check_period="15s"

clear_log()
{
if [ !-f${log} ]
then
touch ${log}
else
cat /dev/null > ${log}
fi
}

init()
{

activ=0
gw1="111.111.111.111"
gw2="192.168.10.1"
prefered_gw=${gw1}
dev_if1="eth1"
dev_if2="wlan1"
if1="111.111.111.112"
if2="192.168.10.27"

gw1_curr_status=0
gw2_curr_status=0

gw1_curr_packet_loss=0
gw2_curr_packet_loss=0

gw1_max_packet_loss=30
gw2_max_packet_loss=30
}

clear_log
echo `date +"%T %d.%m.%Y"`."--------cheking status-------------------|" >>${log}
echo " " >>${log}

check_isp2()
{
gw2_curr_packet_loss=`ping -I ${dev_if2} -c2 -q -W3 ${gw2} |grep loss |awk '{print $6}' |cut -d "%" -f1`

echo `date +"%T %d.%m.%Y"`."ISP 2 Check Result packet_loss = ${gw2_curr_packet_loss}" >> ${log}

if [[ "${gw2_curr_packet_loss}" == *+* ]];
then
echo `date +"%T %d.%m.%Y"`."ISP 2 Status is BAD" >>${log}
gw2_curr_status=0
return
fi

if [ "${gw2_curr_packet_loss}" -lt "${gw2_max_packet_loss}" ];
then
gw2_curr_status=1
echo `date +"%T %d.%m.%Y"`."ISP 2 Status is OK" >>${log}
return

else
gw2_curr_status=0
echo `date +"%T %d.%m.%Y"`."ISP 2 Status is BAD" >>${log}
return
fi

}

check_isp1()
{
if [ ${activ} -eq 0 ]
then
gw1_curr_packet_loss=`ping -I ${dev_if1} -c3 -q -W3 195.137.201.73 |grep loss |awk '{print $6}' |cut -d "%" -f1`
if [[ "${gw1_curr_packet_loss}" == *+* ]];
then
gw1_curr_packet_loss=`ping -I ${dev_if1} -c3 -q -W3 ${gw1} |grep loss |awk '{print $6}' |cut -d "%" -f1`

# echo "gw1-curr-packet-loss = " ${gw1_curr_packet_loss}
if [[ "${gw1_curr_packet_loss}" == *+* ]]
then
echo `date +"%T %d.%m.%Y"`."ISP 1 Status is BAD or unplugged ethernet cable-------------" >>${log}
gw1_curr_status=0
return
fi
if [ "${gw1_curr_packet_loss}" -le "${gw1_max_packet_loss}" ]
then
gw1_curr_status=0
echo `date +"%T %d.%m.%Y"`."ISP 1 Status BAD >>> ${gw1} - ok, but 195.137.201.73 unavailable" >> ${log}
return
else
gw1_curr_status=0
echo `date +"%T %d.%m.%Y"`."ISP 1 Status BAD >>> ${gw1} - unavailable" >> ${log}
return
fi
fi
fi

if [ ${activ} -eq 0 ]
then
gw1_curr_packet_loss=`ping -I ${dev_if1} -c3 -q -W3 ${gw1} |grep loss |awk '{print $6}' |cut -d "%" -f1`

if [ "${gw1_curr_packet_loss}" -lt "${gw1_max_packet_loss}" ]
then
gw1_curr_packet_loss=`ping -I ${dev_if1} -c3 -q -W3 195.137.201.73 |grep loss |awk '{print $6}' |cut -d "%" -f1`
echo `date +"%T %d.%m.%Y"`."ISP 1 Status is Good packet_loss = ${gw1_curr_packet_loss}" >>${log}
gw1_curr_status=1
return

fi

if [ "${gw1_curr_packet_loss}" -ge "${gw1_max_packet_loss}" ]
then
echo `date +"%T %d.%m.%Y"`."ISP 1 Status is Bad >>"."${gw1}"." - ok, but 195.137.201.73 packet_loss = ${gw1_curr_packet_loss}" >>${log}
gw1_curr_status=0
return
fi
fi

if [ ${activ} -eq 1 ]
then
gw1_curr_packet_loss=`ping -I ${dev_if1} -c3 -q -W3 ${gw1} |grep loss |awk '{print $6}' |cut -d "%" -f1`
# echo "gw1-curr-packet-loss = " ${gw1_curr_packet_loss}
if [[ "${gw1_curr_packet_loss}" == *+* ]]
then
echo `date +"%T %d.%m.%Y"`."ISP 1 Status BAD >>>". "${gw1}"." -its unavailable" >> ${log}
gw1_curr_status=0
return
# else
fi

if [ "${gw1_curr_packet_loss}" -lt "${gw1_max_packet_loss}" ];
then
/sbin/ip route replace default via ${if1} dev ${dev_if1}
tmpgw=`ping -I ${dev_if1} -c3 -q -W3 195.137.201.73 |grep loss |awk '{print $6}' |cut -d "%" -f1`
# echo "tmpgw = " ${tmpgw}

if [[ "${tmpgw}" == *+* ]];
then
echo "tmpgw = " ${tmpgw}
echo `date +"%T %d.%m.%Y"`."ISP 1 Status BAD >>>". "${gw1}". " -its ok, but 195.137.201.73 unavailable" >> ${log}
gw1_curr_status=0
/sbin/ip route replace default via ${if2} dev ${dev_if2}
return
fi

if [ "${tmpgw}" -gt "${gw1_max_packet_loss}" ]
then
echo `date +"%T %d.%m.%Y"`."ISP 1 Status BAD >>> ${gw1} -it's ok, but 195.137.201.73 unavailable" >> ${log}
gw1_curr_status=0
/sbin/ip route replace default via ${if2} dev ${dev_if2}
return
fi

if [ "${tmpgw}" -lt "${gw1_max_packet_loss}" ]
then
gw1_curr_status=1
echo `date +"%T %d.%m.%Y"`."ISP 1 Status Recover(Good) >>> ${gw1} -it's OK" >> ${log}
/sbin/ip route replace default via ${if2} dev ${dev_if2}
return
fi
else
echo `date +"%T %d.%m.%Y"`."ISP 1 Status BAD >>> ${gw1} -it's unavailable" >> ${log}
gw1_curr_status=0
/sbin/ip route replace default via ${if2} dev ${dev_if2}
return
fi
fi
}

swith_gw()
{
curr_gw=`ip route show |grep default |awk '{print $3}'`
if [ "${curr_gw}" == "${prefered_gw}" ] && [ "${gw1_curr_status}" -eq 1 ]
then
echo `date +"%T %d.%m.%Y"`."GateWay ISP 1 GoodWork" >> ${log}
return
fi

##_replace GW1-->GW2

if [ "${curr_gw}" == "${prefered_gw}" ] && [ "${gw1_curr_status}" -eq 0 ] && [ "${gw2_curr_status}" -eq 1 ] && [ "${activ}" -eq 0 ]
then
echo `date +"%T %d.%m.%Y"`."GateWay ISP 1 -bad-->replace" >> ${log}
/sbin/ip route replace default via ${gw2} dev ${dev_if2}
echo `date +"%T %d.%m.%Y"`."Replace ${gw1} ---> ${gw2} ok" >> ${log}
activ=1
/usr/bin/crontab -r
/etc/megafon.sh
killall wget
echo "Active = ${activ}" >>${log}
return
fi

if [ "${activ}" -eq 1 ] && [ "${gw1_curr_status}" -eq 1 ]
then
echo `date +"%T %d.%m.%Y"`."GateWay ISP 1 recover-->replace" >> ${log}
/sbin/ip route replace default via ${gw1} dev ${dev_if1}
echo `date +"%T %d.%m.%Y"`."Replace ${gw2} ---> ${gw1} ok" >>${log}
activ=0
/etc/ulink.sh
/usr/bin/crontab /etc/download.txt
echo "Active = ${activ}" >>${log}
return
fi

###replace GW2-->GW1

if [ "${gw1_curr_status}" -eq 0 ] && [ "${gw2_curr_status}" -eq 0 ]
then
echo `date +"%T %d.%m.%Y"`." ALL GateWay is DOWN ..............." >>${log}
return
fi
}

#initialization

init
while [ 1 ]
do
check_isp2
check_isp1
swith_gw
sleep ${check_period}
done

Модерирует : ShriEkeR
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