156 lines
4.3 KiB
Dart
156 lines
4.3 KiB
Dart
/*
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* Copyright (c) 2024-2025 Fabian Freund.
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*
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* This file is part of WebLibre
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* (see https://weblibre.eu).
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import 'dart:async';
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import 'package:collection/collection.dart';
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import 'package:flutter_background_service/flutter_background_service.dart';
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import 'package:pluggable_transports_proxy/pluggable_transports_proxy.dart';
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import 'package:tor/tor.dart';
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@pragma('vm:entry-point')
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Future<void> onStart(ServiceInstance service) async {
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Timer? timeout;
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final startedProxyType = <ProxyType>{};
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Tor.init();
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final portSub = Tor.instance.events.stream.listen((port) {
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service.invoke('portUpdate', {'port': port});
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});
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Future<void> stopProxies() async {
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for (final proxyType in startedProxyType) {
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await IPtProxyController().stop(proxyType);
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}
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startedProxyType.clear();
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}
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Future<void> stopService() async {
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timeout?.cancel();
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timeout = null;
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Tor.instance.stop();
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await stopProxies();
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service.invoke('portUpdate', {'port': -1});
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await portSub.cancel();
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await service.stopSelf();
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}
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void addHeartbeat() {
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timeout?.cancel();
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timeout = Timer(const Duration(minutes: 15), () async {
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// logger.i('Terminating tor due to timeout');
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await stopService();
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});
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}
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Future<void> startService(ProxyType? proxyType, String? bridgeLines) async {
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if (proxyType != null) {
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final port = await IPtProxyController().start(proxyType, "");
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startedProxyType.add(proxyType);
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switch (proxyType) {
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case ProxyType.obfs4:
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await Tor.instance.start(obfs4Port: port, bridgeLines: bridgeLines);
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case ProxyType.meekLite:
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throw UnimplementedError();
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case ProxyType.webtunnel:
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throw UnimplementedError();
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case ProxyType.snowflake:
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await Tor.instance.start(
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snowflakePort: port,
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bridgeLines: bridgeLines,
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);
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}
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} else {
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await Tor.instance.start();
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}
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}
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Future<void> reconfigureService(
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ProxyType? proxyType,
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String? bridgeLines,
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) async {
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if (Tor.instance.hasClient) {
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await stopProxies();
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if (proxyType != null) {
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final port = await IPtProxyController().start(proxyType, "");
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startedProxyType.add(proxyType);
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switch (proxyType) {
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case ProxyType.obfs4:
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await Tor.instance.reconfigure(
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obfs4Port: port,
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bridgeLines: bridgeLines,
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);
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case ProxyType.meekLite:
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throw UnimplementedError();
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case ProxyType.webtunnel:
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throw UnimplementedError();
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case ProxyType.snowflake:
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await Tor.instance.reconfigure(
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snowflakePort: port,
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bridgeLines: bridgeLines,
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);
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}
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} else {
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await Tor.instance.reconfigure();
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}
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}
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}
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service.on("startOrReconfigure").listen((event) async {
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final proxyType = ProxyType.values.firstWhereOrNull(
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(x) => x.name == event?['proxyType'],
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);
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await reconfigureService(proxyType, event?['bridgeLines'] as String?);
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if (!Tor.instance.hasClient) {
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await startService(proxyType, event?['bridgeLines'] as String?);
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}
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});
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service.on("reconfigure").listen((event) async {
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final proxyType = ProxyType.values.firstWhereOrNull(
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(x) => x.name == event?['proxyType'],
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);
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await reconfigureService(proxyType, event?['bridgeLines'] as String?);
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});
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service.on("heartbeat").listen((event) {
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// logger.d('Received tor heartbeat');
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addHeartbeat();
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});
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service.on("sync").listen((event) {
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service.invoke('portUpdate', {'port': Tor.instance.port});
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});
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service.on("stop").listen((event) async {
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await stopService();
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});
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}
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