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#!/bin/bash
INTERFACE=mullvad
FAILED_FILE=/tmp/mullvad.failed
fail=false
if [ ! -e /sys/class/net/$INTERFACE ]; then
echo "$INTERFACE interface does not exist"
fail=true
else
start_bytes=$(cat /sys/class/net/$INTERFACE/statistics/rx_bytes)
sleep 30
end_bytes=$(cat /sys/class/net/$INTERFACE/statistics/rx_bytes)
if [ $(($end_bytes-$start_bytes)) -lt 1000 ]; then
#echo "no traffic via $INTERFACE"
fail=true
fi
fi
if $fail; then
systemctl is-active openvpn-client@mullvad.service > /dev/null
if [ $? -ne 0 ]; then
systemctl status openvpn-client@mullvad.service
if [ -e $FAILED_FILE ]; then
echo restart openvpn-client@mullvad.service
systemctl restart openvpn-client@mullvad.service
else
touch $FAILED_FILE
fi
fi
else
if [ -e $FAILED_FILE ]; then
rm $FAILED_FILE
fi
fi
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