0vpn-options

#!/bin/bash

# This script is expected to be sourced by the other 0vpn-scripts

if [ "$0" == "${BASH_SOURCE[0]}" ]; then
    echo "This script is made to be sourced, not run."
    exit 1
fi

ZEROVPN_SERVER_HOSTNAME="$(hostname --long)"
ZEROVPN_SERVER_NAME="$(hostname --short)"
ZEROVPN_WIREGUARD_PORT="4242"
ZEROVPN_ANNOUNCE_PORT="4243"
ZEROVPN_ANNOUNCE_INTERVAL="10"
ZEROVPN_DNS_PORT="53"
ZEROVPN_KEYFILE="key"
ZEROVPN_TLD="internal"
ZEROVPN_WIREGUARD_DEVICE="wg0"
ZEROVPN_STATIC_CLIENTS=""
ZEROVPN_CLIENT_NAME="$(hostname --short)"

function help {
    echo "Common available options:"
    echo "  --server-hostname [hostname]     (default: \"$ZEROVPN_SERVER_HOSTNAME\")"
    echo "  --server-name [name]             (default: \"$ZEROVPN_SERVER_NAME\")"
    echo "  --wireguard-port [port]          (default: \"$ZEROVPN_WIREGUARD_PORT\")"
    echo "  --announce-port [port]           (default: \"$ZEROVPN_ANNOUNCE_PORT\")"
    echo "  --dns-port [port]                (default: \"$ZEROVPN_DNS_PORT\")"
    echo "  --keyfile [filename]             (default: \"$ZEROVPN_KEYFILE\")"
    echo "  --tld [domain-name]              (default: \"$ZEROVPN_TLD\")"
    echo "  --wireguard-device [device-name] (default: \"$ZEROVPN_WIREGUARD_DEVICE\")"
    echo ""
    echo "Server-only options:"
    echo "  --static-clients [list of names] (default: \"$ZEROVPN_STATIC_CLIENTS\")"
    echo ""
    echo "Client-only options:"
    echo "  --client-name [name]             (default: \"$ZEROVPN_CLIENT_NAME\")"
    echo "  --announce-interval [seconds]    (default: \"$ZEROVPN_ANNOUNCE_INTERVAL\")"
}

while true; do
    if [ "$#" -eq 0 ]; then
        break;
    fi

    case $1 in
        --server-hostname) ZEROVPN_SERVER_HOSTNAME="$2"; shift 2;;
        --server-name) ZEROVPN_SERVER_NAME="$2"; shift 2;;
        --wireguard-port) ZEROVPN_WIREGUARD_PORT="$2"; shift 2;;
        --announce-port) ZEROVPN_ANNOUNCE_PORT="$2"; shift 2;;
        --announce-interval) ZEROVPN_ANNOUNCE_INTERVAL="$2"; shift 2;;
        --dns-port) ZEROVPN_DNS_PORT="$2"; shift 2;;
        --keyfile) ZEROVPN_KEYFILE="$2"; shift 2;;
        --tld) ZEROVPN_TLD="$2"; shift 2;;
        --wireguard-device) ZEROVPN_WIREGUARD_DEVICE="$2"; shift 2;;
        --static-clients) ZEROVPN_STATIC_CLIENTS="$2"; shift 2;;
        --client-name) ZEROVPN_CLIENT_NAME="$2"; shift 2;;
        --help) help; shift 1; exit 0;;
        -h) help; shift 1; exit 0;;
        *) echo "Error parsing arguments. Expected argument. Got: \"$1\""; exit 1;;
    esac
done

echo "Configuration:"
for n in "${!ZEROVPN_@}"; do echo "  $n=${!n}"; done