#!/bin/sh /etc/rc.common

# Copyright 2020 Google LLC.
# Copyright (C) 2021 CZ.NIC z.s.p.o. (https://www.nic.cz/)
# SPDX-License-Identifier: Apache-2.0

USE_PROCD=1
START=80

export TS_NO_LOGS_NO_SUPPORT=true

start_service() {
  local service_enabled
  local state_file
  local port
  local std_out

  config_load tailscale
  config_get_bool service_enabled "settings" service_enabled 0
  [ "$service_enabled" -eq 1 ] || return 0

  config_get_bool std_out "settings" log_stdout 1
  config_get port "settings" port 41641
  config_get state_file "settings" state_file /etc/tailscale/tailscaled.state
  local fw_mode="auto"
  if [ -x /usr/sbin/nft ] && command -v fw4 >/dev/null 2>&1; then
    fw_mode="nftables"
  elif [ -x /usr/sbin/iptables ]; then
    fw_mode="iptables"
  fi

  /usr/sbin/tailscaled --cleanup

  procd_open_instance
  procd_set_param command /bin/sh -c 'exec /usr/sbin/tailscaled "$@" 2>&1' --

  # Set backend firewall mode automatically based on active OpenWrt firewall
  procd_set_param env TS_DEBUG_FIREWALL_MODE="$fw_mode"

  # Disable logging to log.tailscale.com
  procd_append_param env TS_NO_LOGS_NO_SUPPORT=true

  # Set the port to listen on for incoming VPN packets.
  # Remote nodes will automatically be informed about the new port number,
  # but you might want to configure this in order to set external firewall
  # settings.
  procd_append_param command --port "$port"
  procd_append_param command --state "$state_file"

  procd_set_param respawn
  procd_set_param stdout "$std_out"
  procd_set_param stderr 0

  procd_close_instance
}

stop_service() {
  /usr/sbin/tailscaled --cleanup
  killall -9 tailscaled 2>/dev/null || true
}

service_triggers() {
	procd_add_reload_trigger "tailscale"
}