Ubuntu CLI VPN manager

manage_vpns.sh

#!/bin/bash

function check_status {
    # $1 is VPN name
    vpnName=$1
    vpnIP=`nmcli connection show $vpnName | grep 'IP4.ADDRESS\[1\]' | awk '{print $2}' | cut -d'/' -f1`
    vpnGateway=`nmcli connection show $vpnName | grep IP4.GATEWAY | awk '{print $2}'`
    if [ "$vpnGateway" == "--" ]
    then
    vpnGateway=`echo $vpnIP | sed 's/\.[0-9]\{1,3\}$/\.1/'`
    fi
    interfaceName=`ifconfig | grep -w "$vpnIP" -B 1 | head -1 | awk '{print $1}' | cut -d':' -f1 `
    pingStatus`ping -c1 -I $interfaceName -W3 $vpnGateway 2>&1 >/dev/null;echo $?`
    return $pingStatus
}

# Usage is manage_vpns.sh <connection_name>
if [ -z "$1" ]; then
    show_help
    exit 1
fi

# Show help function
function show_help {
    echo "
    Usage: manage_vpns.sh <connection_name>
    
    This will toggle the VPN connection with the given name."
}

function enable_vpn {
    # Enable the one we want to enable
    nmcli connection up "$1"
}

function disable_vpn {
    nmcli connection down "$1"
}

# Run notify-send and show running VPN connection if -s is passed
if [ "$1" == "-s" ]; then
    wifi_name=`nmcli connection show | grep wifi | grep -v '\-\-' | awk '{print $1}'`
    vpns=$(nmcli connection show --active | grep vpn | awk '{print $1}')
    if [ -z "$vpns" ]; then
        message="No VPN connection is running"
    else
        for vpn in $vpns
        do
            vpns_statuses+="$vpn is connected\n"
        done
        # notify-send "VPN" "VPN connection is running: $vpns"
        message="VPN Statuses:\n $vpns_statuses"
    fi
    notify-send -t 1000 "Network status" "Wifi: $wifi_name \n\n\n$message"
    exit 0
fi

# Check if the connection is already running
if [ "$(nmcli connection show $1 | grep -c "activated")" -eq 1 ]; then
    echo "Disabling $1"
    # If it is, deactivate it
    disable_vpn $1
else
    # If it isn't, activate it
    enable_vpn $1
fi