#!/bin/sh
# pings a pre-determined IP address and restarts OpenVPN if ping doesn't work

# Set outputfiles
OUTPUT_FILE="/pinger/log.txt"
IP_FILE="/pinger/lastip.txt"

# Ping settings. think of something when you are dealing with a spotty connection like wifi
PING_IP="8.8.8.8"
PING_AMOUNT="1"

# Command to determine IP address. Maybe make this a setting later
IP_COMMAND="wget http://ipinfo.io/ip -qO -"

echo "Pinging $PING_IP, trying $PING_AMOUNT times"
ping -c $PING_AMOUNT $PING_IP

STATUS=$?

if [ "$STATUS" = "0" ] ; then
    echo "Ping was successful, internet still works, saving IP"
    $IP_COMMAND > $IP_FILE
else
    echo "Ping failed, restarting OpenVPN"
    LOG_TIME=$(date)
    LAST_IP=$(cat $IP_FILE)
    echo "last known IP address was $LAST_IP"
    service openvpn restart
    sleep 5
    NEW_IP=$($IP_COMMAND)
    echo "new IP is $NEW_IP"
    echo -e "$LOG_TIME\tRestarted OpenVPN. Old IP: $LAST_IP\t\tNew IP:$NEW_IP" >> $OUTPUT_FILE
    echo $NEW_IP > $IP_FILE
fi

exit 0