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#!/usr/bin/env sh
CACHE="${XDG_CACHE_HOME:-${HOME}/.cache}/nordconnect"
CONFIG="${XDG_CONFIG_HOME:-${HOME}/.config}/nordconnect"
CREDENTIALS="${CONFIG}/credentials"
FILES_FOLDER="${CONFIG}/files"
ZIP_FILE="${CACHE}/ovpn.zip"
die() {
echo "$@" >&2; exit 1
}
connect() {
PORT="$1"
SERVER="$2"
[ -f "$CREDENTIALS" ] || die "Please run ${0} --init before connecting for the first time."
[ -d "$FILES_FOLDER" ] || mkdir -p "$FILES_FOLDER"
CONFIG_FILE="ovpn_${PORT}/${SERVER}.nordvpn.com.${PORT}.ovpn"
[ -f "${FILES_FOLDER}/${CONFIG_FILE}" ] || {
unzip -t "$ZIP_FILE" "$CONFIG_FILE" >/dev/null || update
unzip -oqu "$ZIP_FILE" "$CONFIG_FILE" -d "$FILES_FOLDER" || die "Server ${SERVER} on port ${PORT} not found."
}
echo "Connecting to server ${SERVER} on port ${PORT}"
LOGS_FOLDER="${CONFIG}/logs"
[ -d "$LOGS_FOLDER" ] || mkdir -p "$LOGS_FOLDER"
touch "${LOGS_FOLDER}/openvpn.log" "${LOGS_FOLDER}/status.log"
set -- \
--redirect-gateway \
--auth-retry nointeract \
--config "${FILES_FOLDER}/${CONFIG_FILE}" \
--auth-user-pass "$CREDENTIALS" \
--log "${LOGS_FOLDER}/openvpn.log" \
--status "${LOGS_FOLDER}/status.log" \
--syslog "$0"
UPDATE_SYSTEMD_RESOLVED=/etc/openvpn/scripts/update-systemd-resolved
[ -f "$UPDATE_SYSTEMD_RESOLVED" ] && {
set -- "$@" \
--dhcp-option DOMAIN-ROUTE . \
--script-security 2 \
--setenv PATH '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin' \
--up "$UPDATE_SYSTEMD_RESOLVED" \
--down "$UPDATE_SYSTEMD_RESOLVED" \
--down-pre
}
echo "Check log files at $LOGS_FOLDER if errors occur."
unset CONFIG_FILE LOGS_FOLDER PORT SERVER UPDATE_SYSTEMD_RESOLVED
exec sudo openvpn "${@}"
}
init() {
[ -d "$CONFIG" ] || mkdir -p "$CONFIG"
printf 'Enter your username for NordVPN, i.e. youremail@yourmail.com: '; read -r USERNAME
stty -echo 2>/dev/null
printf 'Enter the password for NordVPN: '; read -r PASSWORD
stty echo 2>/dev/null
printf '%s\n%s' "$USERNAME" "$PASSWORD" > "$CREDENTIALS"
unset USERNAME PASSWORD
chmod 600 "$CREDENTIALS"
}
update() {
[ -d "$CACHE" ] || mkdir -p "$CACHE"
rm -- "$ZIP_FILE"
# shamelessly stolen from winetricks
case "$NORDCONNECT_DOWNLOADER" in
aria2c|curl|wget|fetch) DOWNLOADER="$NORDCONNECT_DOWNLOADER";;
'')
if [ -x "$(command -v aria2c 2>/dev/null)" ]; then
DOWNLOADER=aria2c
elif [ -x "$(command -v wget 2>/dev/null)" ]; then
DOWNLOADER=wget
elif [ -x "$(command -v curl 2>/dev/null)" ]; then
DOWNLOADER=curl
elif [ -x "$(command -v fetch 2>/dev/null)" ]; then
DOWNLOADER=fetch
else
die 'Please install aria2c, wget, curl or fetch'
fi;;
*) die "Invalid value ${NORDCONNECT_DOWNLOADER} given for NORDCONNECT_DOWNLOADER. Possible values: aria2c, curl, wget, fetch."
esac
# Common values for aria2c/curl/fetch/wget
# Number of retry attempts (not supported by fetch):
DOWNLOADER_RETRIES=${NORDCONNECT_DOWNLOADER_RETRIES:-3}
# Connection timeout time (in seconds):
DOWNLOADER_TIMEOUT=${NORDCONNECT_DOWNLOADER_TIMEOUT:-15}
URL='https://downloads.nordcdn.com/configs/archives/servers/ovpn.zip'
echo "Downloading ${URL}"
case "$DOWNLOADER" in
aria2c)
aria2c \
--connect-timeout="$DOWNLOADER_TIMEOUT" \
--continue \
--daemon=false \
--dir="$(dirname "$ZIP_FILE")" \
--enable-rpc=false \
--input-file='' \
--max-connection-per-server=5 \
--max-tries="$DOWNLOADER_RETRIES" \
--out="$(basename "$ZIP_FILE")" \
--save-session='' \
--stream-piece-selector=geom \
"$URL";;
wget)
wget \
-O "$ZIP_FILE" \
-nd \
-c \
--read-timeout 300 \
--retry-connrefused \
--timeout "$DOWNLOADER_TIMEOUT" \
--tries "$DOWNLOADER_RETRIES" \
"$URL";;
curl)
curl \
--connect-timeout "$DOWNLOADER_TIMEOUT" \
-L \
-o "$ZIP_FILE" \
-C - \
--retry "$DOWNLOADER_RETRIES" \
"$URL";;
fetch)
fetch \
-T "$DOWNLOADER_TIMEOUT" \
-o "$ZIP_FILE" \
"$URL";;
*) die 'Here be dragons';;
esac || die "Could not download $URL!"
find "$FILES_FOLDER" -name "*.ovpn" -delete
unset DOWNLOADER DOWNLOADER_RETRIES DOWNLOADER_TIMEOUT URL
}
usage() {
echo "\
usage: ${0} [-h] [--init | --update | server]
positonal arguments:
server
optional arguments:
-h --help show this help message and exit
-i --init initialise and store/change credentials
-u --update download/update VPN config files
"
}
TEMP=$(getopt -s 'sh' -o 'hiu' -l 'help,init,tcp,udp,update' -n "$0" -- "$@")
eval set -- "$TEMP"
while true; do
case "$1" in
-h|--help) ACTION=usage;;
-i|--init) ACTION=${ACTION:-init};;
-u|--update) ACTION=${ACTION:-update};;
--tcp) PORT=tcp;;
--udp) PORT=udp;;
--) shift; break;;
esac; shift
done
[ -z "$ACTION" ] && [ -n "$1" ] && {
ACTION=connect
SERVER="$1"
}
case "${ACTION:-usage}" in
usage) usage;;
init) init;;
update) update;;
connect) connect "${PORT:-udp}" "$SERVER";;
*) usage;;
esac
unset ACTION CACHE CONFIG CREDENTIALS FILES_FOLDER PORT SERVER TEMP
# vim:set ts=2 sw=2 et:
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