VPN-BT-Keep-0.2

#!/bin/bash
# VPN-BT-Keep-0.2 201901150500 not validated; Also available at http://paste.debian.net/plain/1060550
# This program stops a program when your VPN connection is lost then restarts it after the connection is re-established.
# From https://www.debian-fr.org/t/ordonner-a-transmission-de-se-fermer-si-la-connexion-vpn-est-perdue/78326
# and https://www.wareziens.net/forum/viewtopic.php?id=36487&p=

UUID_VPN=00589c54-affc-43bd-b252-fee06ded1a89 # UUID_VPN DE SIMULATION À MODIFIER AVEC LE VOTRE # UUID_VPN OF SIMULATION TO MODIFY WITH YOUR

# nmcli --pretty connection show --active
# une fois sans avoir activé le vpn et une fois avec le vpn actif.
# once without having activated the vpn and once with the active vpn.
# sélectionnez l'identification uuid correspondante au vpn
# select the uuid identification corresponding to the vpn

function is_vpn_active() {
nmcli --terse --fields uuid  connection  show --active | fgrep --quiet $UUID_VPN && echo 1 || echo 0
}

#Attmept a VPN connection until connected
function connectVPN()
{
    while : #If the connection is just started or lost, try to reconnect then break out once connected.
    do
        connected=$(is_vpn_active) #Store the current state of the VPN connection.
        if [ "$connected" = "1" ]; then
            echo "connectVPN: vpn up"
            echo ""
            transmission-gtk &
            break
        else
            echo "connectVPN: vpn down, Attempting VPN connection in 20 seconds."
            sleep 20 #Give the VPN time to recover so we don't abuse it with reconnection requests.
            echo "nordvpn connect ..." #Retry the VPN : Ligne de connexion au VPN à adapter. VPN connection line to adapt.
        fi
        done
}

#Monitor the VPN and secure VPN dependancies.
connectVPN
date
while true; do
    vpnstring=$(is_vpn_active)    #Define a string to test, 0 = no connection, 1 = connected.
    case $vpnstring in
    "0")
        date
        killall transmission-gtk
        connectVPN
    ;;
    "1")
        sleep 1
    ;;
    esac
done