#!/bin/bash

LOGFILE=/home/pi/bin/log/network-monitor.log
maxPloss=10


if ifconfig eth0 | grep -q "inet addr:" ;
then
#echo "$(date "+%m %d %Y %T") : Local Ethernet OK" >> $LOGFILE
echo "Local Ethernet OK. Local IP $(ifconfgi eth0 | grep -q "inet addr:")"
echo "Pinging google.com to check DNS..."
# Initialize to a value that would force a restart
# (just in case ping gives an error and ploss doesn't get set)
if ping -c1 google.com 2>&1 | grep unknown ; then
echo "Unknown host when ping google.com. Restart router..."
echo "Unknown host when ping google.com. Restart router..." >> $LOGFILE
gpio mode 0 out
gpio write 0 0 #Turn Off Relay GPIO 17 PIN
sleep 10s
gpio write 0 1 #Turn ON Relay GPIO 17 PIN
#echo "$(date "+%m %d %Y %T") : Waitimg 1m and restart eth0 interface ifdown ifup..." >> $LOGFILE
#sleep 1m
#ifdown eth0
#ifup eth0
else
ploss=10
echo "Set ploss to 10."
echo "Send 10 Ping to google.com to check package loss..."
# now ping google for 10 seconds and count packet loss
ploss=$(ping -q -w10 www.google.com | grep -o "[0-9]*%" | tr -d %) > /dev/null 2>&1
echo ""$ploss"% pocket loss after 10 ping google.com"
if [ "$ploss" -gt "$maxPloss" ]; then
echo "$(date "+%m %d %Y %T") : Packet loss from google.com ($ploss%) exceeded $maxPloss, restarting Router GPIO17..." >> $LOGFILE
#Restart Router...
gpio mode 0 out
gpio write 0 0 #Turn Off Relay GPIO 17 PIN
sleep 10s
gpio write 0 1 #Turn ON Relay GPIO 17 PIN
#echo "$(date "+%m %d %Y %T") : Waitimg 1m and restart eth0 interface ifdown ifup..." >> $LOGFILE
#sleep 1m
#ifdown eth0
#ifup eth0
else
echo "$(date "+%m %d %Y %T") : System Online. Google.com package loss ($ploss%)" >> $LOGFILE
ip=$(wget -q -O - checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//')
echo "IP from DDNS.ORG "$ip""
ping=$(sudo /usr/local/bin/noip2 -S 2>&1 | grep -E -o "([0-9]{1,3}[\.]){3}[0-9]{1,3}")
echo "IP from last noip2 -S "$ping""
if [ ${ip/:''} == ${ping/:''} ]
then
echo "IP "$ip" is updated in NOIP"
#echo "$(date "+%m %d %Y %T") : External IP and NOIP are the same - "$ip"" >> $LOGFILE

else
echo "External IP: "$ip"" | echo "Last noip2 IP: "$ping"" | echo "Restarting noip2..."
echo "$(date "+%m %d %Y %T") : External IP "$ip" - NOIP2 "$ping". Restarting noip2... " >> $LOGFILE
service noip restart
ping2=$(sudo /usr/local/bin/noip2 -S 2>&1 | grep -E -o "([0-9]{1,3}[\.]){3}[0-9]{1,3}")
echo "$(date "+%m %d %Y %T") : NOIP2 after restart: "$ping2"" >> $LOGFILE
echo "Zmienil sie numer IP Raspberry PI na "$ip"" | mail -s "Raspberry PI - Zmiana IP na "$ip"" solotgz@gmail.com
fi
fi
fi
else
echo "$(date "+%m %d %Y %T") : Ethernet connection down! Attempting reconnection." >> $LOGFILE
ifdown eth0
ifup --force eth0
sleep 5s
if ifconfig eth0 | grep -q "inet addr:" ; then
STATE=$(ifconfig eth0 | grep "inet addr:")
echo "$(date "+%m %d %Y %T") : Network connection reset. Current state is" $STATE >> $LOGFILE
echo "$(date "+%m %d %Y %T") : Restarting OpenVPN..." >> $LOGFILE
service openvpn restart
echo "Wykryto zawieszenie sie polaczenia lokalnego. Zrestartowanie eth0 oraz OpenVPN" | mail -s "Zrestartowanoa eth0" solotgz@gmail.com
else
echo "$(date "+%m %d %Y %T") : Failed to reset ethernet connection. Going to restart Router GPIO17..." >> $LOGFILE
#Restart Router...
gpio mode 0 out
gpio write 0 0 #Turn Off Relay GPIO 17 PIN
sleep 5s
gpio write 0 1 #Turn ON Relay GPIO 17 PIN
fi
fi