DEFAULT_DOMAIN="google.com"

DEFAULT_PORT="443"

PROGRAM_NAME="telemt"

CONF_DIR="/etc/${PROGRAM_NAME}"

DATA_DIR="/var/lib/${PROGRAM_NAME}"

DEFAULT_DIR="/etc/default"

SYSTEMD_DIR="/etc/systemd/system"

SOURCE="${BASH_SOURCE[0]}"

while [ -h "$SOURCE" ]; do

DIR="$(cd -P "$(dirname "$SOURCE")" && pwd)"

SOURCE="$(readlink "$SOURCE")"

[[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE"

SCRIPT_DIR="$(cd -P "$(dirname "$SOURCE")" && pwd)"

SCRIPT_NAME=$(basename "$0")

_command_exists() {

type "$1" &>/dev/null

}

COMMAND_EXIST_ARRAY=(JQ NETSTAT CURL WGET TAR SYSTEMCTL OPENSSL)

for ((i=0; i<${#COMMAND_EXIST_ARRAY[@]}; i++)); do

__CMDVAR=${COMMAND_EXIST_ARRAY[$i]}

CMD_FIND=$(echo "${__CMDVAR}" | tr '[:upper:]' '[:lower:]')

if _command_exists ${CMD_FIND} ; then

eval $__CMDVAR'_BIN'="'$(which ${CMD_FIND})'"

hash "${CMD_FIND}" >/dev/null 2>&1

else

echo -e "ERROR: Command '${CMD_FIND}' not found."

exit 1

fi

if _command_exists pgrep; then

PGREP_BIN=$(which pgrep)

PROCESS_RUN=$(${PGREP_BIN} -x "${PROGRAM_NAME}" 2>/dev/null | wc -l)

PROCESS_RUN=$(ps -ef 2>/dev/null | grep [t]elemt -c)

_confirm() {

}

if [ ${PROCESS_RUN} -ne 0 ]; then

echo "WARNING: TeleMT is already running."

if [ ! -f "${CONF_DIR}/.installed" ]; then

echo "ERROR: TeleMT was installed by another script or in another way and cannot be reinstalled by this script."

exit 1

fi

if [ -f "/etc/redhat-release" ]; then

DEFAULT_DIR=/ets/sysconfig

if [ -f "${CONF_DIR}/.installed" ]; then

echo "WARNING: TeleMT is already installed."

echo "CONF_DIR: ${CONF_DIR}"

echo "DATA_DIR: ${DATA_DIR}"

echo "DEFAULT_DIR: ${DEFAULT_DIR}"

_confirm "Would you really reinstall TeleMT (old config file will be renamed)? [y/N]" || exit 0

OS_NAME=$(uname -s)

echo "OS: ${OS_NAME}"

if [ -f "/etc/os-release" ]; then

. "/etc/os-release"

OS=$NAME

VER=$VERSION_ID

echo "Distro: ${OS}"

echo "Version: ${VER}"

elif type lsb_release >/dev/null 2>&1; then

OS=$(lsb_release -si)

VER=$(lsb_release -sr)

echo "Distro: ${OS}"

echo "Version: ${VER}"

elif [ -f "/etc/lsb-release" ]; then

. "/etc/lsb-release"

OS=$DISTRIB_ID

VER=$DISTRIB_RELEASE

echo "Distro: ${OS}"

echo "Version: ${VER}"

elif [ -f "/etc/debian_version" ]; then

OS=Debian

VER=$(cat "/etc/debian_version")

echo "Distro: ${OS}"

echo "Version: ${VER}"

echo "Distro: Unknown"

echo "Version: Unknown"

echo -n "Checking your privileges... "

CURRENT_USER=$(whoami)

if [[ "${CURRENT_USER}" = "root" ]]; then

echo "OK"

echo "ERROR: root access is required"

exit 1

echo "Downloading latest version..."

${WGET_BIN} "https://github.com/telemt/telemt/releases/latest/download/telemt-$(uname -m)-linux-$(ldd --version 2>&1 | grep -iq musl && echo musl || echo gnu).tar.gz" -O "${SCRIPT_DIR}/${PROGRAM_NAME}.tar.gz" >/dev/null 2>&1

if [ $? -eq 0 ]; then

echo "Download complete."

if [ -f "${SCRIPT_DIR}/${PROGRAM_NAME}.tar.gz" ]; then

echo "Extract ${PROGRAM_NAME}.tar.gz..."

${TAR_BIN} -zxf "${SCRIPT_DIR}/${PROGRAM_NAME}.tar.gz" >/dev/null 2>&1

else

echo "ERROR: TeleMT archive not found. Exit..."

exit 1

fi

if [ -f "${SCRIPT_DIR}/${PROGRAM_NAME}" ]; then

echo "Stoping old TeleMT..."

${SYSTEMCTL_BIN} stop ${PROGRAM_NAME} >/dev/null 2>&1

echo "Install new binary..."

yes | cp "${SCRIPT_DIR}/${PROGRAM_NAME}" "/usr/sbin/${PROGRAM_NAME}"

else

echo "ERROR: TeleMT binary not found. Exit..."

exit 1

fi

echo "Creating config directory '${CONF_DIR}'..."

mkdir "${CONF_DIR}" >/dev/null 2>&1

mkdir "${DATA_DIR}" >/dev/null 2>&1

if [ -f "${CONF_DIR}/${PROGRAM_NAME}.toml" ]; then

echo "Backup old config..."

rm -f "${CONF_DIR}/${PROGRAM_NAME}.bak" >/dev/null 2>&1

yes | mv "${CONF_DIR}/${PROGRAM_NAME}.toml" "${CONF_DIR}/${PROGRAM_NAME}.bak" >/dev/null 2>&1

fi

if [ ! -f "${CONF_DIR}/${PROGRAM_NAME}.toml" ]; then

echo -n "Enter Fake-TLS domain [${DEFAULT_DOMAIN}]: "

read FAKE_TLS_DOMAIN

if [ -z "${FAKE_TLS_DOMAIN}" ]; then

FAKE_TLS_DOMAIN="${DEFAULT_DOMAIN}"

fi

SECRET_HEX=$(${OPENSSL_BIN} rand -hex 16)

echo -n "Enter Bind port [${DEFAULT_PORT}]: "

read BIND_PORT

if [ -z "${BIND_PORT}" ]; then

BIND_PORT="${DEFAULT_PORT}"

fi

echo "Created standart Telemt config..."

cat <<EOF >"${CONF_DIR}/${PROGRAM_NAME}.toml"

fi

rm -f "${SCRIPT_DIR}/${PROGRAM_NAME}.tar.gz" >/dev/null 2>&1

rm -rf "${SCRIPT_DIR}/${PROGRAM_NAME}" >/dev/null 2>&1

if ! id "${PROGRAM_NAME}" &>/dev/null; then

echo "Creating system user and group..."

useradd --system --home-dir ${DATA_DIR} --no-create-home --shell /usr/sbin/nologin --user-group ${PROGRAM_NAME} >/dev/null 2>&1

if [ $? -ne 0 ]; then

echo "ERROR: System user not created. Exit..."

exit 1

fi

fi

echo "Creating file '${DEFAULT_DIR}/${PROGRAM_NAME}'..."

cat <<EOF >"${DEFAULT_DIR}/${PROGRAM_NAME}"

chown -R ${PROGRAM_NAME}:${PROGRAM_NAME} "${CONF_DIR}" "${DATA_DIR}" "${DEFAULT_DIR}/${PROGRAM_NAME}" >/dev/null 2>&1

chmod 750 "${CONF_DIR}" "${DATA_DIR}" "${DEFAULT_DIR}/${PROGRAM_NAME}" >/dev/null 2>&1

chmod 640 "${CONF_DIR}/${PROGRAM_NAME}.toml" >/dev/null 2>&1

echo "Creating systemd unit file..."

cat <<EOF >"${SYSTEMD_DIR}/${PROGRAM_NAME}.service"

echo "Starting Telemt..."

${SYSTEMCTL_BIN} daemon-reload >/dev/null 2>&1

${SYSTEMCTL_BIN} enable ${PROGRAM_NAME} --now >/dev/null 2>&1

touch "${CONF_DIR}/.installed" >/dev/null 2>&1

echo "Waiting 10 second..."

sleep 10

echo "Show logs:"

journalctl -u ${PROGRAM_NAME} -n 35 --no-pager

echo "Show netstat:"

${NETSTAT_BIN} -ltupn | grep LISTEN | grep ${PROGRAM_NAME}

echo "Show connections links per user:"

${CURL_BIN} -s http://127.0.0.1:9091/v1/users | ${JQ_BIN} -r '.data[] | "[\(.username)]", (.links.classic[]? | "classic: \(.)"), (.links.secure[]? | "secure: \(.)"), (.links.tls[]? | "tls: \(.)"), ""'

echo "ERROR: Download not completed. Exit..."

exit 1