I need a custom script that checks OpenVPN connection

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mkaand
DD-WRT User


Joined: 06 Jan 2008
Posts: 307
Location: Istanbul
PostPosted: Sun Jul 30, 2017 14:11    Post subject: Reply with quote
Thank you very much mchaley. But my system a little bir complicated. I use too much services and it effects each other. dnsmasq and ubound services has special config files. I changed my scripts a little bit. Now it works perfectly. I fixed my problem. My latest fix bold values:

vpn-pass.sh file it runs every hour:

Quote:

#!/bin/bash
#
######################################################################
#
# vpn-pass.sh @ VERSION 1.1
#
# VPNBook Password Updater by Kaan Dogan
#
######################################################################

file=/tmp/openvpncl/credentials
statuscode=`curl -sL -w "%{http_code}\\n" "http://xxxxxxxxxxxx/vpnbook.php" -o /dev/null`
oldpassword=$(cat "$file")
oldpassword=$(echo $oldpassword| cut -d' ' -f 2)

vpnpasssrc="http://xxxxxxxxxxxxxxxxxxx/vpnbook.php"
newpassword=$( curl -s "$vpnpasssrc" )

if [ "$statuscode" == "200" ]; then
if [ "$newpassword" != "$oldpassword" ]; then
nvram set openvpncl_pass="$newpassword";
nvram commit;
reboot;
fi
fi
kill $(ps | grep "custom.sh" | grep -v "grep" | cut -d " " -f1)
kill $(ps | grep "ping" | grep -v "grep" | cut -d " " -f1)
kill $(ps | grep "custom.sh" | grep -v "grep" | cut -d " " -f2)
kill $(ps | grep "ping" | grep -v "grep" | cut -d " " -f2)
sh /tmp/custom.sh


custom.sh file:

Quote:

kill $(ps | grep "vpn-pass.sh" | grep -v "grep" | cut -d " " -f1)
kill $(ps | grep "vpn-pass.sh" | grep -v "grep" | cut -d " " -f2)
testserver="pandora.com"

REACHEABLE=0;
while [ $REACHEABLE -ne "1" ];
do
ping -q -W 5 $testserver &> /dev/null; REACHEABLE=$?;
if [ $REACHEABLE -eq 0 ]
then
echo "Pingable"
else
echo "Not Pingable"
stopservice openvpn -f
stopservice dnsmasq -f
sleep 1
stopservice openvpn -f
openvpn --config /jffs/openvpncl/openvpn.conf --route-up /jffs/openvpncl/route-up.sh --route-pre-down /jffs/openvpncl/route-down.sh --daemon
sed -i '/port=0/d' /tmp/dnsmasq.conf
sed -i '/resolv-file=\/tmp\/resolv.dnsmasq/d' /tmp/dnsmasq.conf
dnsmasq --conf-file=/tmp/dnsmasq.conf
fi
done

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mkaand
DD-WRT User


Joined: 06 Jan 2008
Posts: 307
Location: Istanbul
PostPosted: Wed Aug 09, 2017 22:14    Post subject: Reply with quote
I changed my system a little bit. Because if VPN down I can ping thru my WAN. Instead of heavy pings I simplified my code. Every hour vpn-pass.sh checks vpnbook password. If it was changed, it will change on router and reboot. If the VPN password didn't change, it starts custom.sh. It checks the traceroute result. I know my VPN gateway is 10.10.0.1 works perfectly.


vpn-pass.sh file it runs every hour:

Quote:

#!/bin/bash
#
######################################################################
#
# vpn-pass.sh @ VERSION 1.2
#
# VPNBook Password Updater by Kaan Dogan
#
######################################################################

file=/tmp/openvpncl/credentials
statuscode=`curl -sL -w "%{http_code}\\n" "http://xxxxxxxxxxxx/vpnbook.php" -o /dev/null`
oldpassword=$(cat "$file")
oldpassword=$(echo $oldpassword| cut -d' ' -f 2)

vpnpasssrc="http://xxxxxxxxxxxxxxxxxxx/vpnbook.php"
newpassword=$( curl -s "$vpnpasssrc" )

if [ "$statuscode" == "200" ]; then
if [ "$newpassword" != "$oldpassword" ]; then
nvram set openvpncl_pass="$newpassword";
nvram commit;
reboot;
fi
fi
#kill $(ps | grep "custom.sh" | grep -v "grep" | cut -d " " -f1)
#kill $(ps | grep "ping" | grep -v "grep" | cut -d " " -f1)
#kill $(ps | grep "custom.sh" | grep -v "grep" | cut -d " " -f2)
#kill $(ps | grep "ping" | grep -v "grep" | cut -d " " -f2)
sh /tmp/custom.sh


custom.sh file:

Quote:

#!/bin/bash
#kill $(ps | grep "vpn-pass.sh" | grep -v "grep" | cut -d " " -f1)
#kill $(ps | grep "vpn-pass.sh" | grep -v "grep" | cut -d " " -f2)

testserver="pandora.com"
traceroute $testserver -m 2 > /tmp/traceroute;

if grep -q '10.10.0.1' '/tmp/traceroute'; then

echo Traceable;

else

echo "Not Traceable"
stopservice openvpn -f
stopservice dnsmasq -f
sleep 1
stopservice openvpn -f
openvpn --config /jffs/openvpncl/openvpn.conf --route-up /jffs/openvpncl/route-up.sh --route-pre-down /jffs/openvpncl/route-down.sh --daemon
sed -i '/port=0/d' /tmp/dnsmasq.conf
sed -i '/resolv-file=\/tmp\/resolv.dnsmasq/d' /tmp/dnsmasq.conf
dnsmasq --conf-file=/tmp/dnsmasq.conf

fi

_________________
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