#!/bin/bash

## Mandatory variables
sessionStart="UNSET"
clientHostAddress="UNSET"
clientUID="UNSET"
sessionDuration="UNSET"
txVolume="UNSET"
rxVolume="UNSET"

## Parse variables

if [ ! -z "$time_ascii" ]; then
        sessionStart=$time_ascii
fi

if [ ! -z "$trusted_ip" ]; then
        clientHostAddress=$trusted_ip
fi

if [ ! -z "$username" ]; then
        clientUID=$username
fi

if [ ! -z "$time_duration" ]; then
        sessionDuration=$time_duration
fi

if [ ! -z "$bytes_sent" ]; then
        txVolume=$bytes_sent
fi

if [ ! -z "$bytes_received" ]; then
        rxVolume=$bytes_received
fi

echo "$common_name ($clientHostAddress) Disconnect: Last for $sessionDuration seconds, TX: $txVolume bytes RX: $rxVolume bytes" >> /etc/openvpn/usage.log