SstpFlutter

SstpFlutter is a Flutter plugin for SSTP VPN connections. It provides a convenient way to manage SSTP VPN connections, monitor connection status, and configure various settings.

Features

• Connect to SSTP VPN server
• Monitor connection status and duration
• Retrieve download and upload speed
• Enable and disable DNS
• Enable and disable proxy
• Save server data for quick connection
• Check the last connection status
• Get installed apps and manage allowed apps

Getting Started

To use this plugin, add sstp_flutter as a dependency in your pubspec.yaml file.

dependencies:
  sstp_flutter: ^version

Then, run flutter pub get to install the dependency.

iOS Setup

1. Add Capabillity

Add Network Extensions capabillity on Runner's Target and enable Packet Tunnel

2. Add New Target

Click + button on bottom left, Choose NETWORK EXTENSION. And set Language and Provider Type to Objective-C and Packet Tunnel as image below.

3. Add Capabillity to sstp_extension

Repeat the step 1 for new target you created on previous step (sstp_extension)

4. Add Framework Search Path

Select sstp_extension and add the following lines to your Build Setting > Framework Search Path:

$(SRCROOT)/.symlinks/plugins/sstp_flutter/ios/ext

$(SRCROOT)/.symlinks/plugins/sstp_flutter/ios/openconnect

5. Copy Paste

Open sstp_extension > PacketTunnelProvider.m and copy paste this script PacketTunnelProvider.m

Example

import 'package:sstp_flutter/sstp_flutter.dart';

void main() async {
  SstpFlutter sstpFlutter = SstpFlutter();
  var cert_dir = "";

  // Take VPN permission
  await sstpFlutter.takePermission();
  
  // Create an SSTP server object
SSTPServer server = SSTPServer(
   host: hostNameController.text,
   port: int.parse(sslPortController.text),
   username: userNameController.text,
   password: passController.text,
   androidConfiguration: SSTPAndroidConfiguration(
   verifyHostName: false,
   useTrustedCert: false,
   verifySSLCert: false,
   sslVersion: SSLVersions.TLSv1_1,
   showDisconnectOnNotification: true,
   notificationText: "Notification Text Holder",
    ),
   iosConfiguration: SSTPIOSConfiguration(
   enableMSCHAP2: true,
   enableCHAP: false,
   enablePAP: false,
   enableTLS: false,
    ),
   );
  
  // Save created SSTP server
  await sstpFlutter.saveServerData(server: server);

  // Opens files and then returns selected directory path (Android only)
  certDir = await sstpFlutterPlugin.addCertificate();

  // Connect to SSTP VPN
  await sstpFlutter.connectVpn();

  // Monitor connection status
  sstpFlutterPlugin.onResult(
   onConnectedResult: (ConnectionTraffic traffic, Duration duration) {
    setState(() {
      connectionTimer = duration;
      connectionStatus = "connected";
      downSpeed = traffic.downloadTraffic ?? 0;
      upSpeed = traffic.uploadTraffic ?? 0;
      });
    },
   onConnectingResult: () {
    debugPrint("onConnectingResult");
    setState(() {å
     connectionStatus = "connecting";
     });
    },
   onDisconnectedResult: () {
    debugPrint("onDisconnectedResult");
    setState(() {
     connectionStatus = "disconnected";
     downSpeed = 0;
     upSpeed = 0;
     });
    },
   onError: () {});


  // Disconnect from SSTP VPN
  await sstpFlutter.disconnect();

  // Get installed apps (Android only)
  List<InstalledAppInfo> installedApps = await sstpFlutter.getInstalledApps();
  print('Installed Apps: $installedApps');

  // Get allowed apps (Android only)
  List<String> allowedApps = await sstpFlutter.getAllowedApps();
  print('Allowed Apps: $allowedApps');

  // Add apps to allowed apps (Android only)
  await sstpFlutter.addToAllowedApps(packages: ['com.example.app']);

  // Enable DNS (Android only)
  await sstpFlutter.enableDns(DNS: '8.8.8.8');

  // Disable DNS (Android only)
  await sstpFlutter.disableDNS();

  // Enable proxy (Android only)
  await sstpFlutter.enableProxy(proxy: SSTPProxy(host: 'proxy.example.com', port: 8080));

  // Disable proxy (Android only)
  await sstpFlutter.disableProxy();

  // Check last connection status
  UtilKeys status = await sstpFlutter.checkLastConnectionStatus();
  print('Last Connection Status: $status');
}

Please note that the plugin methods may throw exceptions (PlatformException). Handle them appropriately in your application.

Contributions and Issues

Feel free to contribute to this project by submitting pull requests or reporting issues on the GitHub repository.

This addition emphasizes that the purpose of the plugin is to provide a secure means for web surfing using SSTP VPN connections. Adjustments can be made based on your specific requirements.

Support this Project

If you find this project helpful, consider supporting it by making a donation. Major of Your contribution will spend on charity every month.

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Thank you for your support! 🚀