Version bump

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

.gitignore

@@ -13,3 +13,5 @@ build/
 *.class
 *.dex
 *.iml
+*.jks
+keystore.properties

app/build.gradle

@@ -1,5 +1,9 @@
 apply plugin: 'com.android.application'
 
+// Create a variable called keystorePropertiesFile, and initialize it to your
+// keystore.properties file, in the rootProject folder.
+final def keystorePropertiesFile = rootProject.file("keystore.properties")
+
 android {
     buildToolsVersion '27.0.3'
     compileOptions {
@@ -14,8 +18,30 @@ android {
         applicationId 'com.wireguard.android'
         minSdkVersion 21
         targetSdkVersion 27
-        versionCode 421
-        versionName '0.0.20180604'
+        versionCode 423
+        versionName '0.0.20180606'
+    }
+    // If the keystore file exists
+    if (keystorePropertiesFile.exists()) {
+        // Initialize a new Properties() object called keystoreProperties.
+        final def keystoreProperties = new Properties()
+
+        // Load your keystore.properties file into the keystoreProperties object.
+        keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
+
+        signingConfigs {
+            release {
+                keyAlias keystoreProperties['keyAlias']
+                keyPassword keystoreProperties['keyPassword']
+                storeFile file(keystoreProperties['storeFile'])
+                storePassword keystoreProperties['storePassword']
+            }
+        }
+    }
+    buildTypes {
+        release {
+            if (keystorePropertiesFile.exists()) signingConfig signingConfigs.release
+        }
     }
     externalNativeBuild {
         cmake {
@@ -26,19 +52,16 @@ android {
 ext {
     databindingVersion = '3.1.2'
     supportLibsVersion = '27.1.1'
-    daggerVersion = '2.14.1'
     streamsupportVersion = '1.6.0'
 }
 
 dependencies {
-    annotationProcessor "com.google.dagger:dagger-compiler:$daggerVersion"
     implementation "com.android.databinding:library:$databindingVersion"
     implementation "com.android.support:appcompat-v7:$supportLibsVersion"
     implementation "com.android.support:cardview-v7:$supportLibsVersion"
     implementation "com.android.support:design:$supportLibsVersion"
     implementation "com.android.support:preference-v14:$supportLibsVersion"
     implementation "com.android.support:support-annotations:$supportLibsVersion"
-    implementation "com.google.dagger:dagger:$daggerVersion"
     implementation "net.sourceforge.streamsupport:android-retrofuture:$streamsupportVersion"
     implementation "net.sourceforge.streamsupport:android-retrostreams:$streamsupportVersion"
 }

app/src/main/java/com/wireguard/android/Application.java

@@ -1,12 +1,10 @@
 /*
- * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 package com.wireguard.android;
 
-import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.Handler;
@@ -23,133 +21,78 @@ import com.wireguard.android.model.TunnelManager;
 import com.wireguard.android.util.AsyncWorker;
 import com.wireguard.android.util.RootShell;
 import com.wireguard.android.util.ToolsInstaller;
-import com.wireguard.android.util.Topic;
 
 import java.io.File;
+import java.lang.ref.WeakReference;
 import java.util.concurrent.Executor;
 
-import javax.inject.Qualifier;
-import javax.inject.Scope;
-
-import dagger.Component;
-import dagger.Module;
-import dagger.Provides;
-
-/**
- * Base context for the WireGuard Android application. This class (instantiated once during the
- * application lifecycle) maintains and mediates access to the global state of the application.
- */
-
 public class Application extends android.app.Application {
-    private static ApplicationComponent component;
+    private static WeakReference<Application> weakSelf;
+    private AsyncWorker asyncWorker;
+    private Backend backend;
+    private RootShell rootShell;
+    private SharedPreferences sharedPreferences;
+    private ToolsInstaller toolsInstaller;
+    private TunnelManager tunnelManager;
+    public Application() {
+        weakSelf = new WeakReference<>(this);
+    }
 
-    public static ApplicationComponent getComponent() {
-        if (component == null)
-            throw new IllegalStateException("Application instance not yet created");
-        return component;
+    public static Application get() {
+        return weakSelf.get();
+    }
+
+    public static AsyncWorker getAsyncWorker() {
+        return get().asyncWorker;
+    }
+
+    public static Backend getBackend() {
+        return get().backend;
+    }
+
+    public static Class getBackendType() {
+        return get().backend.getClass();
+    }
+
+    public static RootShell getRootShell() {
+        return get().rootShell;
+    }
+
+    public static SharedPreferences getSharedPreferences() {
+        return get().sharedPreferences;
+    }
+
+    public static ToolsInstaller getToolsInstaller() {
+        return get().toolsInstaller;
+    }
+
+    public static TunnelManager getTunnelManager() {
+        return get().tunnelManager;
     }
 
     @Override
     public void onCreate() {
         super.onCreate();
-        component = DaggerApplication_ApplicationComponent.builder()
-                .applicationModule(new ApplicationModule(this))
-                .build();
-        component.getTunnelManager().onCreate();
-    }
 
-    @ApplicationScope
-    @Component(modules = ApplicationModule.class)
-    public interface ApplicationComponent {
-        AsyncWorker getAsyncWorker();
+        final Executor executor = AsyncTask.SERIAL_EXECUTOR;
+        final Handler handler = new Handler(Looper.getMainLooper());
+        final ConfigStore configStore = new FileConfigStore(getApplicationContext());
 
-        Class getBackendType();
+        asyncWorker = new AsyncWorker(executor, handler);
+        rootShell = new RootShell(getApplicationContext());
+        toolsInstaller = new ToolsInstaller(getApplicationContext());
 
-        ToolsInstaller getToolsInstaller();
+        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
+        AppCompatDelegate.setDefaultNightMode(
+                sharedPreferences.getBoolean("dark_theme", false) ?
+                        AppCompatDelegate.MODE_NIGHT_YES : AppCompatDelegate.MODE_NIGHT_NO);
 
-        TunnelManager getTunnelManager();
+        if (new File("/sys/module/wireguard").exists())
+            backend = new WgQuickBackend(getApplicationContext());
+        else
+            backend = new GoBackend(getApplicationContext());
 
-        Topic getThemeChangeTopic();
-    }
-
-    @Qualifier
-    public @interface ApplicationContext {
-    }
-
-    @Qualifier
-    public @interface ApplicationHandler {
-    }
-
-    @Scope
-    public @interface ApplicationScope {
-    }
-
-    @Module
-    public static final class ApplicationModule {
-        private final Context context;
-
-        private ApplicationModule(final Application application) {
-            context = application.getApplicationContext();
-
-            AppCompatDelegate.setDefaultNightMode(
-                    getPreferences(context).getBoolean("dark_theme", false) ?
-                          AppCompatDelegate.MODE_NIGHT_YES : AppCompatDelegate.MODE_NIGHT_NO);
-        }
-
-        @ApplicationScope
-        @Provides
-        public static Backend getBackend(@ApplicationContext final Context context,
-                                         final RootShell rootShell,
-                                         final ToolsInstaller toolsInstaller) {
-            if (new File("/sys/module/wireguard").exists())
-                return new WgQuickBackend(context, rootShell, toolsInstaller);
-            else
-                return new GoBackend(context);
-        }
-
-        @ApplicationScope
-        @Provides
-        public static Class getBackendType(final Backend backend) {
-            return backend.getClass();
-        }
-
-        @ApplicationScope
-        @Provides
-        public static ConfigStore getConfigStore(@ApplicationContext final Context context) {
-            return new FileConfigStore(context);
-        }
-
-        @ApplicationScope
-        @Provides
-        public static Topic getThemeChangeTopic() {
-            return new Topic();
-        }
-
-
-        @ApplicationScope
-        @Provides
-        public static Executor getExecutor() {
-            return AsyncTask.SERIAL_EXECUTOR;
-        }
-
-        @ApplicationHandler
-        @ApplicationScope
-        @Provides
-        public static Handler getHandler() {
-            return new Handler(Looper.getMainLooper());
-        }
-
-        @ApplicationScope
-        @Provides
-        public static SharedPreferences getPreferences(@ApplicationContext final Context context) {
-            return PreferenceManager.getDefaultSharedPreferences(context);
-        }
-
-        @ApplicationContext
-        @ApplicationScope
-        @Provides
-        public Context getContext() {
-            return context;
-        }
+        tunnelManager = new TunnelManager(backend, configStore);
+        tunnelManager.onCreate();
     }
 }

app/src/main/java/com/wireguard/android/BootShutdownReceiver.java

@@ -20,13 +20,12 @@ public class BootShutdownReceiver extends BroadcastReceiver {
 
     @Override
     public void onReceive(final Context context, final Intent intent) {
-        if (Application.getComponent().getBackendType() != WgQuickBackend.class) {
+        if (Application.getBackendType() != WgQuickBackend.class)
             return;
-        }
         final String action = intent.getAction();
         if (action == null)
             return;
-        final TunnelManager tunnelManager = Application.getComponent().getTunnelManager();
+        final TunnelManager tunnelManager = Application.getTunnelManager();
         if (Intent.ACTION_BOOT_COMPLETED.equals(action)) {
             Log.i(TAG, "Broadcast receiver restoring state (boot)");
             tunnelManager.restoreState(false).whenComplete(ExceptionLoggers.D);

app/src/main/java/com/wireguard/android/QuickTileService.java

@@ -38,7 +38,6 @@ public class QuickTileService extends TileService {
     private final OnStateChangedCallback onStateChangedCallback = new OnStateChangedCallback();
     private final OnTunnelChangedCallback onTunnelChangedCallback = new OnTunnelChangedCallback();
     private Tunnel tunnel;
-    private TunnelManager tunnelManager;
 
     @Override
     public void onClick() {
@@ -54,12 +53,11 @@ public class QuickTileService extends TileService {
     @Override
     public void onCreate() {
         super.onCreate();
-        tunnelManager = Application.getComponent().getTunnelManager();
     }
 
     @Override
     public void onStartListening() {
-        tunnelManager.addOnPropertyChangedCallback(onTunnelChangedCallback);
+        Application.getTunnelManager().addOnPropertyChangedCallback(onTunnelChangedCallback);
         if (tunnel != null)
             tunnel.addOnPropertyChangedCallback(onStateChangedCallback);
         updateTile();
@@ -69,7 +67,7 @@ public class QuickTileService extends TileService {
     public void onStopListening() {
         if (tunnel != null)
             tunnel.removeOnPropertyChangedCallback(onStateChangedCallback);
-        tunnelManager.removeOnPropertyChangedCallback(onTunnelChangedCallback);
+        Application.getTunnelManager().removeOnPropertyChangedCallback(onTunnelChangedCallback);
     }
 
     private void onToggleFinished(@SuppressWarnings("unused") final State state,
@@ -84,7 +82,7 @@ public class QuickTileService extends TileService {
 
     private void updateTile() {
         // Update the tunnel.
-        final Tunnel newTunnel = tunnelManager.getLastUsedTunnel();
+        final Tunnel newTunnel = Application.getTunnelManager().getLastUsedTunnel();
         if (newTunnel != tunnel) {
             if (tunnel != null)
                 tunnel.removeOnPropertyChangedCallback(onStateChangedCallback);

app/src/main/java/com/wireguard/android/activity/BaseActivity.java

@@ -11,24 +11,19 @@ import android.databinding.CallbackRegistry;
 import android.databinding.CallbackRegistry.NotifierCallback;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
 
 import com.wireguard.android.Application;
 import com.wireguard.android.backend.GoBackend;
 import com.wireguard.android.model.Tunnel;
 import com.wireguard.android.model.TunnelManager;
-import com.wireguard.android.util.Topic;
 
-import java.lang.reflect.Field;
 import java.util.Objects;
 
 /**
  * Base class for activities that need to remember the currently-selected tunnel.
  */
 
-public abstract class BaseActivity extends AppCompatActivity implements Topic.Subscriber {
-    private static final String TAG = "WireGuard/" + BaseActivity.class.getSimpleName();
-
+public abstract class BaseActivity extends ThemeChangeAwareActivity {
     private static final String KEY_SELECTED_TUNNEL = "selected_tunnel";
 
     private final SelectionChangeRegistry selectionChangeRegistry = new SelectionChangeRegistry();
@@ -45,8 +40,6 @@ public abstract class BaseActivity extends AppCompatActivity implements Topic.Su
 
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
-        subscribeTopics();
-
         // Restore the saved tunnel if there is one; otherwise grab it from the arguments.
         String savedTunnelName = null;
         if (savedInstanceState != null)
@@ -54,27 +47,20 @@ public abstract class BaseActivity extends AppCompatActivity implements Topic.Su
         else if (getIntent() != null)
             savedTunnelName = getIntent().getStringExtra(KEY_SELECTED_TUNNEL);
         if (savedTunnelName != null) {
-            final TunnelManager tunnelManager = Application.getComponent().getTunnelManager();
+            final TunnelManager tunnelManager = Application.getTunnelManager();
             selectedTunnel = tunnelManager.getTunnels().get(savedTunnelName);
         }
 
         // The selected tunnel must be set before the superclass method recreates fragments.
         super.onCreate(savedInstanceState);
 
-        if (Application.getComponent().getBackendType() == GoBackend.class) {
+        if (Application.getBackendType() == GoBackend.class) {
             final Intent intent = GoBackend.VpnService.prepare(this);
-            if (intent != null) {
+            if (intent != null)
                 startActivityForResult(intent, 0);
-            }
         }
     }
 
-    @Override
-    protected void onDestroy() {
-        unsubscribeTopics();
-        super.onDestroy();
-    }
-
     @Override
     protected void onSaveInstanceState(final Bundle outState) {
         if (selectedTunnel != null)
@@ -118,28 +104,4 @@ public abstract class BaseActivity extends AppCompatActivity implements Topic.Su
             super(new SelectionChangeNotifier());
         }
     }
-
-    @Override
-    public void onTopicPublished(Topic topic) {
-        try {
-            Field f = getResources().getClass().getDeclaredField("mResourcesImpl");
-            f.setAccessible(true);
-            Object o = f.get(getResources());
-            f = o.getClass().getDeclaredField("mDrawableCache");
-            f.setAccessible(true);
-            o = f.get(o);
-            f = o.getClass().getSuperclass().getDeclaredField("mThemedEntries");
-            f.setAccessible(true);
-            o = f.get(o);
-            o.getClass().getMethod("clear").invoke(o);
-        } catch (Exception e) {
-            Log.e(TAG, "Failed to flush icon cache", e);
-        }
-        recreate();
-    }
-
-    @Override
-    public Topic[] getSubscription() {
-        return new Topic[] { Application.getComponent().getThemeChangeTopic() };
-    }
 }

app/src/main/java/com/wireguard/android/activity/MainActivity.java

@@ -6,6 +6,7 @@
 
 package com.wireguard.android.activity;
 
+import android.annotation.SuppressLint;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
@@ -71,17 +72,17 @@ public class MainActivity extends BaseActivity {
     public void onBackPressed() {
         TunnelListFragment fragment = null;
         try {
-            fragment =
-                    ((TunnelListFragment)
-                            getSupportFragmentManager().getFragments().get(0));
-        } catch (final ClassCastException ignored) {
-        }
-        if (fragment == null || !(fragment.collapseActionMenu())) {
+            fragment = ((TunnelListFragment) getSupportFragmentManager().getFragments().get(0));
+        } catch (final ClassCastException ignored) { }
+        if (fragment == null || !fragment.collapseActionMenu()) {
             if (!moveToState(State.ofLayer(state.layer - 1)))
                 super.onBackPressed();
         }
     }
 
+    // We use onTouchListener here to avoid the UI click sound, hence
+    // calling View#performClick defeats the purpose of it.
+    @SuppressLint("ClickableViewAccessibility")
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -95,6 +96,15 @@ public class MainActivity extends BaseActivity {
             moveToState(initialState);
         }
         updateActionBar();
+        final int actionBarId = getResources().getIdentifier("action_bar", "id", getPackageName());
+        if (actionBarId != 0 && findViewById(actionBarId) != null) {
+            findViewById(actionBarId).setOnTouchListener((v, e) -> {
+                try {
+                    ((TunnelListFragment) getSupportFragmentManager().getFragments().get(0)).collapseActionMenu();
+                } catch (final ClassCastException ignored) { }
+                return false;
+            });
+        }
     }
 
     @Override
@@ -131,7 +141,6 @@ public class MainActivity extends BaseActivity {
         super.onSaveInstanceState(outState);
     }
 
-
     @Override
     protected void onSelectedTunnelChanged(final Tunnel oldTunnel, final Tunnel newTunnel) {
         moveToState(newTunnel != null ? State.DETAIL : State.LIST);

app/src/main/java/com/wireguard/android/activity/SettingsActivity.java

@@ -21,7 +21,6 @@ import android.view.MenuItem;
 import com.wireguard.android.Application;
 import com.wireguard.android.R;
 import com.wireguard.android.backend.WgQuickBackend;
-import com.wireguard.android.util.Topic;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -33,7 +32,7 @@ import java.util.Map;
  * Interface for changing application-global persistent settings.
  */
 
-public class SettingsActivity extends AppCompatActivity implements Topic.Subscriber {
+public class SettingsActivity extends ThemeChangeAwareActivity {
     private final Map<Integer, PermissionRequestCallback> permissionRequestCallbacks = new HashMap<>();
     private int permissionRequestCounter;
 
@@ -59,7 +58,6 @@ public class SettingsActivity extends AppCompatActivity implements Topic.Subscri
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        subscribeTopics();
         if (getSupportFragmentManager().findFragmentById(android.R.id.content) == null) {
             getSupportFragmentManager().beginTransaction()
                     .add(android.R.id.content, new SettingsFragment())
@@ -67,12 +65,6 @@ public class SettingsActivity extends AppCompatActivity implements Topic.Subscri
         }
     }
 
-    @Override
-    protected void onDestroy() {
-        unsubscribeTopics();
-        super.onDestroy();
-    }
-
     @Override
     public boolean onOptionsItemSelected(final MenuItem item) {
         switch (item.getItemId()) {
@@ -99,47 +91,16 @@ public class SettingsActivity extends AppCompatActivity implements Topic.Subscri
         void done(String[] permissions, int[] grantResults);
     }
 
-    @Override
-    public void onTopicPublished(final Topic topic) {
-        recreate();
-    }
-
-    @Override
-    public Topic[] getSubscription() {
-        return new Topic[] { Application.getComponent().getThemeChangeTopic() };
-    }
-
-    public static class SettingsFragment extends PreferenceFragmentCompat implements SharedPreferences.OnSharedPreferenceChangeListener {
+    public static class SettingsFragment extends PreferenceFragmentCompat {
         @Override
         public void onCreatePreferences(final Bundle savedInstanceState, final String key) {
             addPreferencesFromResource(R.xml.preferences);
-            if (Application.getComponent().getBackendType() != WgQuickBackend.class) {
+            if (Application.getBackendType() != WgQuickBackend.class) {
                 Preference pref = getPreferenceManager().findPreference("tools_installer");
                 getPreferenceScreen().removePreference(pref);
                 pref = getPreferenceManager().findPreference("restore_on_boot");
                 getPreferenceScreen().removePreference(pref);
             }
         }
-
-        @Override
-        public void onResume() {
-            super.onResume();
-            getPreferenceManager().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
-        }
-
-        @Override
-        public void onPause() {
-            getPreferenceManager().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
-            super.onPause();
-        }
-
-        @Override
-        public void onSharedPreferenceChanged(final SharedPreferences sharedPreferences, final String key) {
-            if ("dark_theme".equals(key)) {
-                AppCompatDelegate.setDefaultNightMode(
-                        sharedPreferences.getBoolean(key, false) ? AppCompatDelegate.MODE_NIGHT_YES : AppCompatDelegate.MODE_NIGHT_NO);
-                Application.getComponent().getThemeChangeTopic().publish(false);
-            }
-        }
     }
 }

app/src/main/java/com/wireguard/android/activity/ThemeChangeAwareActivity.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+package com.wireguard.android.activity;
+
+import android.content.SharedPreferences;
+import android.content.res.Resources;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.app.AppCompatDelegate;
+import android.util.Log;
+
+import com.wireguard.android.Application;
+
+import java.lang.reflect.Field;
+
+public abstract class ThemeChangeAwareActivity extends AppCompatActivity implements SharedPreferences.OnSharedPreferenceChangeListener {
+    private static final String TAG = "WireGuard/" + ThemeChangeAwareActivity.class.getSimpleName();
+
+    private static Resources lastResources;
+    private static boolean lastDarkMode;
+    private static synchronized void invalidateDrawableCache(final Resources resources, final boolean darkMode) {
+        if (resources == lastResources && darkMode == lastDarkMode)
+            return;
+
+        try {
+            Field f;
+            Object o = resources;
+            try {
+                f = o.getClass().getDeclaredField("mResourcesImpl");
+                f.setAccessible(true);
+                o = f.get(o);
+            } catch (final Exception ignored) { }
+            f = o.getClass().getDeclaredField("mDrawableCache");
+            f.setAccessible(true);
+            o = f.get(o);
+            try {
+                o.getClass().getMethod("onConfigurationChange", int.class).invoke(o, -1);
+            } catch (final Exception ignored) {
+                o.getClass().getMethod("clear").invoke(o);
+            }
+        } catch (final Exception e) {
+            Log.e(TAG, "Failed to flush drawable cache", e);
+        }
+
+        lastResources = resources;
+        lastDarkMode = darkMode;
+    }
+
+
+    @Override
+    protected void onCreate(final Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        Application.getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
+    }
+
+    @Override
+    protected void onDestroy() {
+        Application.getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
+        super.onDestroy();
+    }
+
+    @Override
+    public void onSharedPreferenceChanged(final SharedPreferences sharedPreferences, final String key) {
+        if ("dark_theme".equals(key)) {
+            final boolean darkMode = sharedPreferences.getBoolean(key, false);
+            AppCompatDelegate.setDefaultNightMode(
+                    sharedPreferences.getBoolean(key, false) ?
+                            AppCompatDelegate.MODE_NIGHT_YES :
+                            AppCompatDelegate.MODE_NIGHT_NO);
+            invalidateDrawableCache(getResources(), darkMode);
+            recreate();
+        }
+    }
+}

app/src/main/java/com/wireguard/android/backend/Backend.java

@@ -62,4 +62,19 @@ public interface Backend {
      * @return The updated state of the tunnel.
      */
     State setState(Tunnel tunnel, State state) throws Exception;
+
+    /**
+     * Determine version of underlying backend.
+     *
+     * @return The version of the backend.
+     * @throws Exception
+     */
+    String getVersion() throws Exception;
+
+    /**
+     * Determine type name of underlying backend.
+     *
+     * @return Type name
+     */
+    String getTypeName();
 }

app/src/main/java/com/wireguard/android/backend/GoBackend.java

@@ -58,7 +58,11 @@ public final class GoBackend implements Backend {
 
     private static native String wgVersion();
 
-    public static String getVersion() { return wgVersion(); }
+    @Override
+    public String getVersion() { return wgVersion(); }
+
+    @Override
+    public String getTypeName() { return "Go userspace"; }
 
     @Override
     public Config applyConfig(final Tunnel tunnel, final Config config) throws Exception {
@@ -229,7 +233,7 @@ public final class GoBackend implements Backend {
 
         @Override
         public void onDestroy() {
-            for (final Tunnel tunnel : Application.getComponent().getTunnelManager().getTunnels()) {
+            for (final Tunnel tunnel : Application.getTunnelManager().getTunnels()) {
                 if (tunnel != null && tunnel.getState() != State.DOWN)
                     tunnel.setState(State.DOWN);
             }
@@ -242,7 +246,7 @@ public final class GoBackend implements Backend {
             vpnService.complete(this);
             if (intent == null || intent.getComponent() == null || !intent.getComponent().getPackageName().equals(getPackageName())) {
                 Log.d(TAG, "Service started by Always-on VPN feature");
-                Application.getComponent().getTunnelManager().restoreState(true).whenComplete(ExceptionLoggers.D);
+                Application.getTunnelManager().restoreState(true).whenComplete(ExceptionLoggers.D);
             }
             return super.onStartCommand(intent, flags, startId);
         }

app/src/main/java/com/wireguard/android/backend/WgQuickBackend.java

@@ -9,11 +9,10 @@ package com.wireguard.android.backend;
 import android.content.Context;
 import android.util.Log;
 
+import com.wireguard.android.Application;
 import com.wireguard.android.model.Tunnel;
 import com.wireguard.android.model.Tunnel.State;
 import com.wireguard.android.model.Tunnel.Statistics;
-import com.wireguard.android.util.RootShell;
-import com.wireguard.android.util.ToolsInstaller;
 import com.wireguard.config.Config;
 
 import java.io.File;
@@ -35,16 +34,23 @@ public final class WgQuickBackend implements Backend {
     private static final String TAG = "WireGuard/" + WgQuickBackend.class.getSimpleName();
 
     private final File localTemporaryDir;
-    private final RootShell rootShell;
-    private final ToolsInstaller toolsInstaller;
 
-    public WgQuickBackend(final Context context, final RootShell rootShell,
-                          final ToolsInstaller toolsInstaller) {
+    public WgQuickBackend(final Context context) {
         localTemporaryDir = new File(context.getCacheDir(), "tmp");
-        this.rootShell = rootShell;
-        this.toolsInstaller = toolsInstaller;
     }
 
+    @Override
+    public String getVersion() throws Exception {
+        final List<String> output = new ArrayList<>();
+        if (Application.getRootShell()
+                .run(output, "cat /sys/module/wireguard/version") != 0 || output.isEmpty())
+            throw new Exception("Unable to determine kernel module version");
+        return output.get(0);
+    }
+
+    @Override
+    public String getTypeName() { return "Kernel module"; }
+
     @Override
     public Config applyConfig(final Tunnel tunnel, final Config config) throws Exception {
         if (tunnel.getState() == State.UP) {
@@ -66,8 +72,8 @@ public final class WgQuickBackend implements Backend {
         final List<String> output = new ArrayList<>();
         // Don't throw an exception here or nothing will show up in the UI.
         try {
-            toolsInstaller.ensureToolsAvailable();
-            if (rootShell.run(output, "wg show interfaces") != 0 || output.isEmpty())
+            Application.getToolsInstaller().ensureToolsAvailable();
+            if (Application.getRootShell().run(output, "wg show interfaces") != 0 || output.isEmpty())
                 return Collections.emptySet();
         } catch (final Exception e) {
             Log.w(TAG, "Unable to enumerate running tunnels", e);
@@ -95,7 +101,7 @@ public final class WgQuickBackend implements Backend {
         if (state == originalState)
             return originalState;
         Log.d(TAG, "Changing tunnel " + tunnel.getName() + " to state " + state);
-        toolsInstaller.ensureToolsAvailable();
+        Application.getToolsInstaller().ensureToolsAvailable();
         setStateInternal(tunnel, tunnel.getConfig(), state);
         return getState(tunnel);
     }
@@ -110,7 +116,7 @@ public final class WgQuickBackend implements Backend {
                 state.toString().toLowerCase(), tempFile.getAbsolutePath());
         if (state == State.UP)
             command = "cat /sys/module/wireguard/version && " + command;
-        final int result = rootShell.run(null, command);
+        final int result = Application.getRootShell().run(null, command);
         // noinspection ResultOfMethodCallIgnored
         tempFile.delete();
         if (result != 0)

app/src/main/java/com/wireguard/android/configStore/FileConfigStore.java

@@ -9,7 +9,6 @@ package com.wireguard.android.configStore;
 import android.content.Context;
 import android.util.Log;
 
-import com.wireguard.android.Application.ApplicationContext;
 import com.wireguard.config.Config;
 
 import java.io.File;
@@ -32,7 +31,7 @@ public final class FileConfigStore implements ConfigStore {
 
     private final Context context;
 
-    public FileConfigStore(@ApplicationContext final Context context) {
+    public FileConfigStore(final Context context) {
         this.context = context;
     }
 

app/src/main/java/com/wireguard/android/fragment/TunnelEditorFragment.java

@@ -128,7 +128,7 @@ public class TunnelEditorFragment extends BaseFragment {
                 }
                 if (tunnel == null) {
                     Log.d(TAG, "Attempting to create new tunnel " + binding.getConfig().getName());
-                    final TunnelManager manager = Application.getComponent().getTunnelManager();
+                    final TunnelManager manager = Application.getTunnelManager();
                     manager.create(binding.getConfig().getName(), newConfig)
                             .whenComplete(this::onTunnelCreated);
                 } else if (!tunnel.getName().equals(binding.getConfig().getName())) {

app/src/main/java/com/wireguard/android/fragment/TunnelListFragment.java

@@ -34,7 +34,6 @@ import android.widget.AdapterView.OnItemClickListener;
 import android.widget.AdapterView.OnItemLongClickListener;
 
 import com.wireguard.android.Application;
-import com.wireguard.android.Application.ApplicationComponent;
 import com.wireguard.android.R;
 import com.wireguard.android.activity.TunnelCreatorActivity;
 import com.wireguard.android.databinding.TunnelListFragmentBinding;
@@ -70,9 +69,7 @@ public class TunnelListFragment extends BaseFragment {
     private final MultiChoiceModeListener actionModeListener = new ActionModeListener();
     private final ListViewCallbacks listViewCallbacks = new ListViewCallbacks();
     private ActionMode actionMode;
-    private AsyncWorker asyncWorker;
     private TunnelListFragmentBinding binding;
-    private TunnelManager tunnelManager;
 
     public boolean collapseActionMenu() {
         if (binding.createMenu.isExpanded()) {
@@ -90,7 +87,7 @@ public class TunnelListFragment extends BaseFragment {
 
         final Collection<CompletableFuture<Tunnel>> futureTunnels = new ArrayList<>();
         final List<Throwable> throwables = new ArrayList<>();
-        asyncWorker.supplyAsync(() -> {
+        Application.getAsyncWorker().supplyAsync(() -> {
             final String[] columns = {OpenableColumns.DISPLAY_NAME};
             String name = null;
             try (Cursor cursor = contentResolver.query(uri, columns,
@@ -137,11 +134,11 @@ public class TunnelListFragment extends BaseFragment {
                             throwables.add(e);
                         }
                         if (config != null)
-                            futureTunnels.add(tunnelManager.create(name, config).toCompletableFuture());
+                            futureTunnels.add(Application.getTunnelManager().create(name, config).toCompletableFuture());
                     }
                 }
             } else {
-                futureTunnels.add(tunnelManager.create(name,
+                futureTunnels.add(Application.getTunnelManager().create(name,
                         Config.from(contentResolver.openInputStream(uri))).toCompletableFuture());
             }
 
@@ -190,9 +187,6 @@ public class TunnelListFragment extends BaseFragment {
     @Override
     public void onCreate(final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        final ApplicationComponent applicationComponent = Application.getComponent();
-        asyncWorker = applicationComponent.getAsyncWorker();
-        tunnelManager = applicationComponent.getTunnelManager();
     }
 
     @Override
@@ -229,6 +223,12 @@ public class TunnelListFragment extends BaseFragment {
             binding.createMenu.collapse();
     }
 
+    @Override
+    public void onPause() {
+        binding.createMenu.collapse();
+        super.onPause();
+    }
+
     @Override
     public void onSelectedTunnelChanged(final Tunnel oldTunnel, final Tunnel newTunnel) {
         // Do nothing.
@@ -269,16 +269,15 @@ public class TunnelListFragment extends BaseFragment {
                     tunnels.size() + throwables.size(),
                     tunnels.size(), tunnels.size() + throwables.size());
 
-        if (binding != null) {
+        if (binding != null)
             Snackbar.make(binding.mainContainer, message, Snackbar.LENGTH_LONG).show();
-        }
     }
 
     @Override
     public void onViewStateRestored(final Bundle savedInstanceState) {
         super.onViewStateRestored(savedInstanceState);
         binding.setFragment(this);
-        binding.setTunnels(tunnelManager.getTunnels());
+        binding.setTunnels(Application.getTunnelManager().getTunnels());
     }
 
     private final class ActionModeListener implements MultiChoiceModeListener {

app/src/main/java/com/wireguard/android/model/TunnelManager.java

@@ -9,19 +9,16 @@ package com.wireguard.android.model;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.databinding.BaseObservable;
 import android.databinding.Bindable;
 import android.support.annotation.NonNull;
 
 import com.wireguard.android.Application;
-import com.wireguard.android.Application.ApplicationScope;
 import com.wireguard.android.BR;
 import com.wireguard.android.backend.Backend;
 import com.wireguard.android.configStore.ConfigStore;
 import com.wireguard.android.model.Tunnel.State;
 import com.wireguard.android.model.Tunnel.Statistics;
-import com.wireguard.android.util.AsyncWorker;
 import com.wireguard.android.util.ExceptionLoggers;
 import com.wireguard.android.util.ObservableKeyedList;
 import com.wireguard.android.util.ObservableSortedKeyedArrayList;
@@ -33,8 +30,6 @@ import java.util.Collection;
 import java.util.Comparator;
 import java.util.Set;
 
-import javax.inject.Inject;
-
 import java9.util.Comparators;
 import java9.util.concurrent.CompletableFuture;
 import java9.util.concurrent.CompletionStage;
@@ -45,7 +40,6 @@ import java9.util.stream.StreamSupport;
  * Maintains and mediates changes to the set of available WireGuard tunnels,
  */
 
-@ApplicationScope
 public final class TunnelManager extends BaseObservable {
     private static final Comparator<String> COMPARATOR = Comparators.<String>thenComparing(
             String.CASE_INSENSITIVE_ORDER, Comparators.naturalOrder());
@@ -53,23 +47,17 @@ public final class TunnelManager extends BaseObservable {
     private static final String KEY_RESTORE_ON_BOOT = "restore_on_boot";
     private static final String KEY_RUNNING_TUNNELS = "enabled_configs";
 
-    private final AsyncWorker asyncWorker;
     private final Backend backend;
     private final ConfigStore configStore;
-    private final SharedPreferences preferences;
     private final ObservableSortedKeyedList<String, Tunnel> tunnels =
             new ObservableSortedKeyedArrayList<>(COMPARATOR);
     private Tunnel lastUsedTunnel;
     private boolean haveLoaded;
     private final ArrayList<CompletableFuture<Void>> delayedLoadRestoreTunnels = new ArrayList<>();
 
-    @Inject
-    public TunnelManager(final AsyncWorker asyncWorker, final Backend backend,
-                         final ConfigStore configStore, final SharedPreferences preferences) {
-        this.asyncWorker = asyncWorker;
+    public TunnelManager(final Backend backend, final ConfigStore configStore) {
         this.backend = backend;
         this.configStore = configStore;
-        this.preferences = preferences;
     }
 
     private Tunnel addToList(final String name, final Config config, final State state) {
@@ -85,7 +73,7 @@ public final class TunnelManager extends BaseObservable {
             final String message = "Tunnel " + name + " already exists";
             return CompletableFuture.failedFuture(new IllegalArgumentException(message));
         }
-        return asyncWorker.supplyAsync(() -> configStore.create(name, config))
+        return Application.getAsyncWorker().supplyAsync(() -> configStore.create(name, config))
                 .thenApply(savedConfig -> addToList(name, savedConfig, State.DOWN));
     }
 
@@ -96,7 +84,7 @@ public final class TunnelManager extends BaseObservable {
         if (wasLastUsed)
             setLastUsedTunnel(null);
         tunnels.remove(tunnel);
-        return asyncWorker.runAsync(() -> {
+        return Application.getAsyncWorker().runAsync(() -> {
             if (originalState == State.UP)
                 backend.setState(tunnel, State.DOWN);
             try {
@@ -123,17 +111,17 @@ public final class TunnelManager extends BaseObservable {
     }
 
     CompletionStage<Config> getTunnelConfig(final Tunnel tunnel) {
-        return asyncWorker.supplyAsync(() -> configStore.load(tunnel.getName()))
+        return Application.getAsyncWorker().supplyAsync(() -> configStore.load(tunnel.getName()))
                 .thenApply(tunnel::onConfigChanged);
     }
 
     CompletionStage<State> getTunnelState(final Tunnel tunnel) {
-        return asyncWorker.supplyAsync(() -> backend.getState(tunnel))
+        return Application.getAsyncWorker().supplyAsync(() -> backend.getState(tunnel))
                 .thenApply(tunnel::onStateChanged);
     }
 
     CompletionStage<Statistics> getTunnelStatistics(final Tunnel tunnel) {
-        return asyncWorker.supplyAsync(() -> backend.getStatistics(tunnel))
+        return Application.getAsyncWorker().supplyAsync(() -> backend.getStatistics(tunnel))
                 .thenApply(tunnel::onStatisticsChanged);
     }
 
@@ -142,8 +130,8 @@ public final class TunnelManager extends BaseObservable {
     }
 
     public void onCreate() {
-        asyncWorker.supplyAsync(configStore::enumerate)
-                .thenAcceptBoth(asyncWorker.supplyAsync(backend::enumerate), this::onTunnelsLoaded)
+        Application.getAsyncWorker().supplyAsync(configStore::enumerate)
+                .thenAcceptBoth(Application.getAsyncWorker().supplyAsync(backend::enumerate), this::onTunnelsLoaded)
                 .whenComplete(ExceptionLoggers.E);
     }
 
@@ -151,7 +139,7 @@ public final class TunnelManager extends BaseObservable {
     private void onTunnelsLoaded(final Iterable<String> present, final Collection<String> running) {
         for (final String name : present)
             addToList(name, null, running.contains(name) ? State.UP : State.DOWN);
-        final String lastUsedName = preferences.getString(KEY_LAST_USED_TUNNEL, null);
+        final String lastUsedName = Application.getSharedPreferences().getString(KEY_LAST_USED_TUNNEL, null);
         if (lastUsedName != null)
             setLastUsedTunnel(tunnels.get(lastUsedName));
         final CompletableFuture<Void>[] toComplete;
@@ -171,7 +159,7 @@ public final class TunnelManager extends BaseObservable {
     }
 
     public void refreshTunnelStates() {
-        asyncWorker.supplyAsync(backend::enumerate)
+        Application.getAsyncWorker().supplyAsync(backend::enumerate)
                 .thenAccept(running -> {
                     for (final Tunnel tunnel : tunnels)
                         tunnel.onStateChanged(running.contains(tunnel.getName()) ? State.UP : State.DOWN);
@@ -180,7 +168,7 @@ public final class TunnelManager extends BaseObservable {
     }
 
     public CompletionStage<Void> restoreState(final boolean force) {
-        if (!force && !preferences.getBoolean(KEY_RESTORE_ON_BOOT, false))
+        if (!force && !Application.getSharedPreferences().getBoolean(KEY_RESTORE_ON_BOOT, false))
             return CompletableFuture.completedFuture(null);
         synchronized (delayedLoadRestoreTunnels) {
             if (!haveLoaded) {
@@ -189,7 +177,7 @@ public final class TunnelManager extends BaseObservable {
                 return f;
             }
         }
-        final Set<String> previouslyRunning = preferences.getStringSet(KEY_RUNNING_TUNNELS, null);
+        final Set<String> previouslyRunning = Application.getSharedPreferences().getStringSet(KEY_RUNNING_TUNNELS, null);
         if (previouslyRunning == null)
             return CompletableFuture.completedFuture(null);
         return CompletableFuture.allOf(StreamSupport.stream(tunnels)
@@ -203,7 +191,7 @@ public final class TunnelManager extends BaseObservable {
                 .filter(tunnel -> tunnel.getState() == State.UP)
                 .map(Tunnel::getName)
                 .collect(Collectors.toUnmodifiableSet());
-        preferences.edit().putStringSet(KEY_RUNNING_TUNNELS, runningTunnels).apply();
+        Application.getSharedPreferences().edit().putStringSet(KEY_RUNNING_TUNNELS, runningTunnels).apply();
     }
 
     private void setLastUsedTunnel(final Tunnel tunnel) {
@@ -212,13 +200,13 @@ public final class TunnelManager extends BaseObservable {
         lastUsedTunnel = tunnel;
         notifyPropertyChanged(BR.lastUsedTunnel);
         if (tunnel != null)
-            preferences.edit().putString(KEY_LAST_USED_TUNNEL, tunnel.getName()).apply();
+            Application.getSharedPreferences().edit().putString(KEY_LAST_USED_TUNNEL, tunnel.getName()).apply();
         else
-            preferences.edit().remove(KEY_LAST_USED_TUNNEL).apply();
+            Application.getSharedPreferences().edit().remove(KEY_LAST_USED_TUNNEL).apply();
     }
 
     CompletionStage<Config> setTunnelConfig(final Tunnel tunnel, final Config config) {
-        return asyncWorker.supplyAsync(() -> {
+        return Application.getAsyncWorker().supplyAsync(() -> {
             final Config appliedConfig = backend.applyConfig(tunnel, config);
             return configStore.save(tunnel.getName(), appliedConfig);
         }).thenApply(tunnel::onConfigChanged);
@@ -237,7 +225,7 @@ public final class TunnelManager extends BaseObservable {
         if (wasLastUsed)
             setLastUsedTunnel(null);
         tunnels.remove(tunnel);
-        return asyncWorker.supplyAsync(() -> {
+        return Application.getAsyncWorker().supplyAsync(() -> {
             if (originalState == State.UP)
                 backend.setState(tunnel, State.DOWN);
             configStore.rename(tunnel.getName(), name);
@@ -259,7 +247,7 @@ public final class TunnelManager extends BaseObservable {
     CompletionStage<State> setTunnelState(final Tunnel tunnel, final State state) {
         // Ensure the configuration is loaded before trying to use it.
         return tunnel.getConfigAsync().thenCompose(x ->
-                asyncWorker.supplyAsync(() -> backend.setState(tunnel, state))
+                Application.getAsyncWorker().supplyAsync(() -> backend.setState(tunnel, state))
         ).whenComplete((newState, e) -> {
             // Ensure onStateChanged is always called (failure or not), and with the correct state.
             tunnel.onStateChanged(e == null ? newState : tunnel.getState());
@@ -272,7 +260,7 @@ public final class TunnelManager extends BaseObservable {
     public static final class IntentReceiver extends BroadcastReceiver {
         @Override
         public void onReceive(final Context context, final Intent intent) {
-            final TunnelManager manager = Application.getComponent().getTunnelManager();
+            final TunnelManager manager = Application.getTunnelManager();
             if (intent == null)
                 return;
             final String action = intent.getAction();

app/src/main/java/com/wireguard/android/preference/LogExporterPreference.java

@@ -51,7 +51,7 @@ public class LogExporterPreference extends Preference {
     }
 
     private void exportLog() {
-        Application.getComponent().getAsyncWorker().supplyAsync(() -> {
+        Application.getAsyncWorker().supplyAsync(() -> {
             final File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
             final File file = new File(path, "wireguard-log.txt");
             if (!path.isDirectory() && !path.mkdirs())
@@ -64,7 +64,7 @@ public class LogExporterPreference extends Preference {
 
             try {
                 final Process process = Runtime.getRuntime().exec(new String[]{
-                        "logcat", "-b", "all", "-d", "-v", "threadtime", "--pid", Integer.toString(android.os.Process.myPid()), "-f", file.getAbsolutePath(), "*:V"});
+                        "logcat", "-b", "all", "-d", "-v", "threadtime", "-f", file.getAbsolutePath(), "*:V"});
                 if (process.waitFor() != 0) {
                     try (final BufferedReader reader = new BufferedReader(new InputStreamReader(process.getErrorStream()))) {
                         final StringBuilder errors = new StringBuilder();

app/src/main/java/com/wireguard/android/preference/ToolsInstallerPreference.java

@@ -13,10 +13,7 @@ import android.system.OsConstants;
 import android.util.AttributeSet;
 
 import com.wireguard.android.Application;
-import com.wireguard.android.Application.ApplicationComponent;
 import com.wireguard.android.R;
-import com.wireguard.android.util.AsyncWorker;
-import com.wireguard.android.util.ToolsInstaller;
 
 /**
  * Preference implementing a button that asynchronously runs {@code ToolsInstaller} and displays the
@@ -24,16 +21,10 @@ import com.wireguard.android.util.ToolsInstaller;
  */
 
 public class ToolsInstallerPreference extends Preference {
-    private final AsyncWorker asyncWorker;
-    private final ToolsInstaller toolsInstaller;
     private State state = State.INITIAL;
 
-    @SuppressWarnings({"SameParameterValue", "WeakerAccess"})
     public ToolsInstallerPreference(final Context context, final AttributeSet attrs) {
         super(context, attrs);
-        final ApplicationComponent applicationComponent = Application.getComponent();
-        asyncWorker = applicationComponent.getAsyncWorker();
-        toolsInstaller = applicationComponent.getToolsInstaller();
     }
 
     @Override
@@ -49,18 +40,18 @@ public class ToolsInstallerPreference extends Preference {
     @Override
     public void onAttached() {
         super.onAttached();
-        asyncWorker.supplyAsync(toolsInstaller::areInstalled).whenComplete(this::onCheckResult);
+        Application.getAsyncWorker().supplyAsync(Application.getToolsInstaller()::areInstalled).whenComplete(this::onCheckResult);
     }
 
     private void onCheckResult(final Integer result, final Throwable throwable) {
         setState(throwable == null && result == OsConstants.EALREADY ?
-                State.ALREADY : State.INITIAL);
+                State.ALREADY : initialState());
     }
 
     @Override
     protected void onClick() {
-        setState(State.WORKING);
-        asyncWorker.supplyAsync(toolsInstaller::install).whenComplete(this::onInstallResult);
+        setState(workingState());
+        Application.getAsyncWorker().supplyAsync(Application.getToolsInstaller()::install).whenComplete(this::onInstallResult);
     }
 
     private void onInstallResult(final Integer result, final Throwable throwable) {
@@ -68,7 +59,7 @@ public class ToolsInstallerPreference extends Preference {
         if (throwable != null)
             nextState = State.FAILURE;
         else if (result == OsConstants.EXIT_SUCCESS)
-            nextState = State.SUCCESS;
+            nextState = successState();
         else if (result == OsConstants.EALREADY)
             nextState = State.ALREADY;
         else
@@ -85,12 +76,26 @@ public class ToolsInstallerPreference extends Preference {
         notifyChanged();
     }
 
+    private State initialState() {
+        return Application.getToolsInstaller().willInstallAsMagiskModule(false) ? State.INITIAL_MAGISK : State.INITIAL_SYSTEM;
+    }
+    private State workingState() {
+        return Application.getToolsInstaller().willInstallAsMagiskModule(false) ? State.WORKING_MAGISK : State.WORKING_SYSTEM;
+    }
+    private State successState() {
+        return Application.getToolsInstaller().willInstallAsMagiskModule(false) ? State.SUCCESS_MAGISK : State.SUCCESS_SYSTEM;
+    }
+
     private enum State {
+        INITIAL(R.string.tools_installer_initial, true),
         ALREADY(R.string.tools_installer_already, false),
         FAILURE(R.string.tools_installer_failure, true),
-        INITIAL(R.string.tools_installer_initial, true),
-        SUCCESS(R.string.tools_installer_success, false),
-        WORKING(R.string.tools_installer_working, false);
+        INITIAL_SYSTEM(R.string.tools_installer_initial_system, true),
+        SUCCESS_SYSTEM(R.string.tools_installer_success_system, false),
+        WORKING_SYSTEM(R.string.tools_installer_working_system, false),
+        INITIAL_MAGISK(R.string.tools_installer_initial_magisk, true),
+        SUCCESS_MAGISK(R.string.tools_installer_success_magisk, false),
+        WORKING_MAGISK(R.string.tools_installer_working_magisk, false);
 
         private final int messageResourceId;
         private final boolean shouldEnableView;

app/src/main/java/com/wireguard/android/preference/VersionPreference.java

@@ -14,25 +14,27 @@ import android.util.AttributeSet;
 import com.wireguard.android.Application;
 import com.wireguard.android.BuildConfig;
 import com.wireguard.android.R;
+import com.wireguard.android.backend.Backend;
 import com.wireguard.android.backend.GoBackend;
 import com.wireguard.android.backend.WgQuickBackend;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class VersionPreference extends Preference {
     private String versionSummary;
 
     public VersionPreference(final Context context, final AttributeSet attrs) {
         super(context, attrs);
 
-        if (Application.getComponent().getBackendType() == GoBackend.class) {
-            versionSummary = getContext().getString(R.string.version_userspace_summary, GoBackend.getVersion());
-        } else if (Application.getComponent().getBackendType() == WgQuickBackend.class) {
-            Application.getComponent().getToolsInstaller().getVersion().whenComplete((version, exception) -> {
-                versionSummary = exception == null
-                        ? getContext().getString(R.string.version_kernel_summary, version)
-                        : getContext().getString(R.string.version_kernel_unknown_summary);
-                notifyChanged();
-            });
-        }
+        final Backend backend = Application.getBackend();
+        versionSummary = getContext().getString(R.string.version_summary_checking, backend.getTypeName().toLowerCase());
+        Application.getAsyncWorker().supplyAsync(backend::getVersion).whenComplete((version, exception) -> {
+            versionSummary = exception == null
+                    ? getContext().getString(R.string.version_summary, backend.getTypeName(), version)
+                    : getContext().getString(R.string.version_summary_unknown, backend.getTypeName().toLowerCase());
+            notifyChanged();
+        });
     }
 
     @Override

app/src/main/java/com/wireguard/android/preference/ZipExporterPreference.java

@@ -58,7 +58,7 @@ public class ZipExporterPreference extends Preference {
     }
 
     private void exportZip() {
-        final List<Tunnel> tunnels = new ArrayList<>(Application.getComponent().getTunnelManager().getTunnels());
+        final List<Tunnel> tunnels = new ArrayList<>(Application.getTunnelManager().getTunnels());
         final List<CompletableFuture<Config>> futureConfigs = new ArrayList<>(tunnels.size());
         for (final Tunnel tunnel : tunnels)
             futureConfigs.add(tunnel.getConfigAsync().toCompletableFuture());
@@ -67,7 +67,7 @@ public class ZipExporterPreference extends Preference {
             return;
         }
         CompletableFuture.allOf(futureConfigs.toArray(new CompletableFuture[futureConfigs.size()]))
-                .whenComplete((ignored1, exception) -> Application.getComponent().getAsyncWorker().supplyAsync(() -> {
+                .whenComplete((ignored1, exception) -> Application.getAsyncWorker().supplyAsync(() -> {
                     if (exception != null)
                         throw exception;
                     final File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);

app/src/main/java/com/wireguard/android/util/AsyncWorker.java

@@ -8,13 +8,8 @@ package com.wireguard.android.util;
 
 import android.os.Handler;
 
-import com.wireguard.android.Application.ApplicationHandler;
-import com.wireguard.android.Application.ApplicationScope;
-
 import java.util.concurrent.Executor;
 
-import javax.inject.Inject;
-
 import java9.util.concurrent.CompletableFuture;
 import java9.util.concurrent.CompletionStage;
 
@@ -22,13 +17,11 @@ import java9.util.concurrent.CompletionStage;
  * Helper class for running asynchronous tasks and ensuring they are completed on the main thread.
  */
 
-@ApplicationScope
 public class AsyncWorker {
     private final Executor executor;
     private final Handler handler;
 
-    @Inject
-    AsyncWorker(final Executor executor, @ApplicationHandler final Handler handler) {
+    public AsyncWorker(final Executor executor, final Handler handler) {
         this.executor = executor;
         this.handler = handler;
     }

app/src/main/java/com/wireguard/android/util/RootShell.java

@@ -9,8 +9,6 @@ package com.wireguard.android.util;
 import android.content.Context;
 import android.util.Log;
 
-import com.wireguard.android.Application.ApplicationContext;
-import com.wireguard.android.Application.ApplicationScope;
 import com.wireguard.android.R;
 
 import java.io.BufferedReader;
@@ -23,13 +21,10 @@ import java.nio.charset.StandardCharsets;
 import java.util.Collection;
 import java.util.UUID;
 
-import javax.inject.Inject;
-
 /**
  * Helper class for running commands as root.
  */
 
-@ApplicationScope
 public class RootShell {
     private static final String SU = "su";
     private static final String TAG = "WireGuard/" + RootShell.class.getSimpleName();
@@ -44,8 +39,7 @@ public class RootShell {
     private OutputStreamWriter stdin;
     private BufferedReader stdout;
 
-    @Inject
-    public RootShell(@ApplicationContext final Context context) {
+    public RootShell(final Context context) {
         deviceNotRootedMessage = context.getString(R.string.error_root);
         final File cacheDir = context.getCacheDir();
         localBinaryDir = new File(cacheDir, "bin");

app/src/main/java/com/wireguard/android/util/ToolsInstaller.java

@@ -11,26 +11,19 @@ import android.system.OsConstants;
 import android.util.Log;
 
 import com.wireguard.android.Application;
-import com.wireguard.android.Application.ApplicationContext;
-import com.wireguard.android.Application.ApplicationScope;
+import com.wireguard.android.BuildConfig;
 import com.wireguard.android.util.RootShell.NoRootException;
 
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-import javax.inject.Inject;
-
-import java9.util.concurrent.CompletionStage;
-
 /**
  * Helper to install WireGuard tools to the system partition.
  */
 
-@ApplicationScope
 public final class ToolsInstaller {
     private static final String[][] EXECUTABLES = {
             {"libwg.so", "wg"},
@@ -46,23 +39,12 @@ public final class ToolsInstaller {
     private final File localBinaryDir;
     private final Object lock = new Object();
     private final File nativeLibraryDir;
-    private final RootShell rootShell;
     private Boolean areToolsAvailable;
+    private Boolean installAsMagiskModule;
 
-    @Inject
-    public ToolsInstaller(@ApplicationContext final Context context, final RootShell rootShell) {
+    public ToolsInstaller(final Context context) {
         localBinaryDir = new File(context.getCacheDir(), "bin");
         nativeLibraryDir = new File(context.getApplicationInfo().nativeLibraryDir);
-        this.rootShell = rootShell;
-    }
-
-    public CompletionStage<String> getVersion() {
-        return Application.getComponent().getAsyncWorker().supplyAsync(() -> {
-            final List<String> output = new ArrayList<>();
-            if (rootShell.run(output, "cat /sys/module/wireguard/version") != 0 || output.isEmpty())
-                throw new RuntimeException("Unable to determine kernel module version");
-            return output.get(0);
-        });
     }
 
     private static File getInstallDir() {
@@ -78,6 +60,7 @@ public final class ToolsInstaller {
     }
 
     public int areInstalled() throws NoRootException {
+        willInstallAsMagiskModule(true);
         if (INSTALL_DIR == null)
             return OsConstants.ENOENT;
         final StringBuilder script = new StringBuilder();
@@ -88,7 +71,7 @@ public final class ToolsInstaller {
         }
         script.append("exit ").append(OsConstants.EALREADY).append(';');
         try {
-            return rootShell.run(null, script.toString());
+            return Application.getRootShell().run(null, script.toString());
         } catch (final IOException ignored) {
             return OsConstants.EXIT_FAILURE;
         }
@@ -114,7 +97,22 @@ public final class ToolsInstaller {
         }
     }
 
-    public int install() throws NoRootException {
+    public boolean willInstallAsMagiskModule(boolean checkForIt) {
+        synchronized (lock) {
+            if (installAsMagiskModule == null) {
+                if (!checkForIt)
+                    throw new RuntimeException("Expected to already know whether this is a Magisk system");
+                try {
+                    installAsMagiskModule = Application.getRootShell().run(null, "[ -d /sbin/.core/mirror -a -d /sbin/.core/img -a ! -f /cache/.disable_magisk ]") == OsConstants.EXIT_SUCCESS;
+                } catch (final Exception ignored) {
+                    installAsMagiskModule = false;
+                }
+            }
+            return installAsMagiskModule;
+        }
+    }
+
+    private int installSystem() throws NoRootException {
         if (INSTALL_DIR == null)
             return OsConstants.ENOENT;
         final StringBuilder script = new StringBuilder("set -ex; ");
@@ -125,12 +123,37 @@ public final class ToolsInstaller {
                     new File(nativeLibraryDir, names[0]), destination, destination, destination));
         }
         try {
-            return rootShell.run(null, script.toString());
+            return Application.getRootShell().run(null, script.toString());
         } catch (final IOException ignored) {
             return OsConstants.EXIT_FAILURE;
         }
     }
 
+    private int installMagisk() throws NoRootException {
+        final StringBuilder script = new StringBuilder("set -ex; ");
+
+        script.append("trap 'rm -rf /sbin/.core/img/wireguard' INT TERM EXIT; ");
+        script.append(String.format("rm -rf /sbin/.core/img/wireguard/; mkdir -p /sbin/.core/img/wireguard%s; ", INSTALL_DIR));
+        script.append(String.format("printf 'name=WireGuard Command Line Tools\nversion=%s\nversionCode=%s\nauthor=zx2c4\ndescription=Command line tools for WireGuard\nminMagisk=1500\n' > /sbin/.core/img/wireguard/module.prop; ", BuildConfig.VERSION_NAME, BuildConfig.VERSION_CODE));
+        script.append("touch /sbin/.core/img/wireguard/auto_mount; ");
+        for (final String[] names : EXECUTABLES) {
+            final File destination = new File("/sbin/.core/img/wireguard" + INSTALL_DIR, names[1]);
+            script.append(String.format("cp '%s' '%s'; chmod 755 '%s'; restorecon '%s' || true; ",
+                    new File(nativeLibraryDir, names[0]), destination, destination, destination));
+        }
+        script.append("trap - INT TERM EXIT;");
+
+        try {
+            return Application.getRootShell().run(null, script.toString());
+        } catch (final IOException ignored) {
+            return OsConstants.EXIT_FAILURE;
+        }
+    }
+
+    public int install() throws NoRootException {
+        return willInstallAsMagiskModule(true) ? installMagisk() : installSystem();
+    }
+
     public int symlink() throws NoRootException {
         final StringBuilder script = new StringBuilder("set -x; ");
         for (final String[] names : EXECUTABLES) {
@@ -148,7 +171,7 @@ public final class ToolsInstaller {
         script.append("exit ").append(OsConstants.EXIT_SUCCESS).append(';');
 
         try {
-            return rootShell.run(null, script.toString());
+            return Application.getRootShell().run(null, script.toString());
         } catch (final IOException ignored) {
             return OsConstants.EXIT_FAILURE;
         }

app/src/main/java/com/wireguard/android/util/Topic.java

@@ -1,109 +0,0 @@
-/*
- * Copyright © 2017 John Wu <topjohnwu@gmail.com>
- * SPDX-License-Identifier: GPL-2.0-or-later
- */
-
-package com.wireguard.android.util;
-
-import java.lang.ref.WeakReference;
-import java.util.Iterator;
-import java.util.LinkedList;
-import java.util.List;
-
-import java.lang.ref.WeakReference;
-import java.util.ArrayList;
-import java.util.List;
-
-public class Topic {
-
-    private static final int NON_INIT = 0;
-    private static final int PENDING = 1;
-    private static final int PUBLISHED = 2;
-
-    private int state = NON_INIT;
-    private List<WeakReference<Subscriber>> subscribers;
-    private Object[] results;
-
-    public Topic() {
-        subscribers = new SyncArrayList<>();
-    }
-
-    public synchronized void subscribe(final Subscriber sub) {
-        subscribers.add(new WeakReference<>(sub));
-    }
-
-    public synchronized void unsubscribe() {
-        subscribers = new SyncArrayList<>();
-    }
-
-    public synchronized void unsubscribe(final Subscriber sub) {
-        List<WeakReference<Subscriber>> subs = subscribers;
-        subscribers = new ArrayList<>();
-        for (final WeakReference<Subscriber> subscriber : subs) {
-            if (subscriber.get() != null && subscriber.get() != sub)
-                subscribers.add(subscriber);
-        }
-    }
-
-    public void reset() {
-        state = NON_INIT;
-        results = null;
-    }
-
-    public boolean isPublished() {
-        return state == PUBLISHED;
-    }
-
-    public void publish() {
-        publish(true);
-    }
-
-    public void publish(boolean record, Object... results) {
-        if (record)
-            state = PUBLISHED;
-        this.results = results;
-        // Snapshot
-        List<WeakReference<Subscriber>> subs = subscribers;
-        for (final WeakReference<Subscriber> subscriber : subs) {
-            if (subscriber != null && subscriber.get() != null)
-                subscriber.get().onTopicPublished(this);
-        }
-    }
-
-    public Object[] getResults() {
-        return results;
-    }
-
-    public boolean isPending() {
-        return state == PENDING;
-    }
-
-    public void setPending() {
-        state = PENDING;
-    }
-
-    public interface Subscriber {
-        default void subscribeTopics() {
-            for (final Topic topic : getSubscription()) {
-                if (topic.isPublished()) {
-                    onTopicPublished(topic);
-                }
-                topic.subscribe(this);
-            }
-        }
-        default void unsubscribeTopics() {
-            for (final Topic event : getSubscription()) {
-                event.unsubscribe(this);
-            }
-        }
-        void onTopicPublished(Topic topic);
-        Topic[] getSubscription();
-    }
-
-    private static class SyncArrayList<E> extends ArrayList<E> {
-        @Override
-        public synchronized boolean add(final E e) {
-            return super.add(e);
-        }
-    }
-}

app/src/main/java/com/wireguard/android/widget/fab/FloatingActionButton.java

@@ -7,7 +7,6 @@
 package com.wireguard.android.widget.fab;
 
 import android.content.Context;
-import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.*;
 import android.graphics.Paint.Style;
@@ -19,7 +18,6 @@ import android.support.annotation.*;
 import android.support.v4.content.ContextCompat;
 import android.support.v7.widget.AppCompatImageButton;
 import android.util.AttributeSet;
-import android.util.TypedValue;
 import android.widget.TextView;
 
 import com.wireguard.android.R;
@@ -60,12 +58,12 @@ public class FloatingActionButton extends AppCompatImageButton {
     }
 
     public static int getColorFromTheme(final Context context, final int themeResource, @ColorRes final int fallback) {
-        final TypedValue typedValue = new TypedValue();
-        final Resources.Theme theme = context.getTheme();
-        theme.resolveAttribute(themeResource, typedValue, true);
-        @ColorInt final int color = typedValue.data;
-        return color == 0 ? fallback : color;
-
+        final TypedArray a = context.obtainStyledAttributes(new int[]{themeResource});
+        try {
+            return a.getColor(0, ContextCompat.getColor(context, fallback));
+        } finally {
+            a.recycle();
+        }
     }
 
     void init(final Context context, final AttributeSet attributeSet) {
@@ -222,6 +220,7 @@ public class FloatingActionButton extends AppCompatImageButton {
 
         final LayerDrawable layerDrawable = new LayerDrawable(
                 new Drawable[]{
+                        //TODO(msf); replace these pngs with programatic elevation
                         getResources().getDrawable(mSize == SIZE_NORMAL ? R.drawable.fab_bg_normal : R.drawable.fab_bg_mini, null),
                         createFillDrawable(strokeWidth),
                         createOuterStrokeDrawable(strokeWidth),

app/src/main/java/com/wireguard/android/widget/fab/FloatingActionsMenu.java

@@ -14,16 +14,13 @@ import android.animation.TimeInterpolator;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
-import android.graphics.Color;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.LayerDrawable;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.support.annotation.ColorRes;
 import android.support.annotation.Keep;
 import android.support.annotation.NonNull;
-import android.support.v4.content.ContextCompat;
 import android.support.v7.widget.AppCompatTextView;
 import android.util.AttributeSet;
 import android.view.ContextThemeWrapper;
@@ -390,11 +387,6 @@ public class FloatingActionsMenu extends ViewGroup {
         return new LayoutParams(super.generateLayoutParams(p));
     }
 
-    @Override
-    protected boolean checkLayoutParams(final ViewGroup.LayoutParams p) {
-        return super.checkLayoutParams(p);
-    }
-
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
@@ -418,7 +410,7 @@ public class FloatingActionsMenu extends ViewGroup {
                     button.getTag(R.id.fab_label) != null) continue;
 
             final AppCompatTextView label = new AppCompatTextView(context);
-            label.setTextAppearance(getContext(), mLabelsStyle);
+            label.setTextAppearance(context, mLabelsStyle);
             label.setText(button.getTitle());
             addView(label);
 

app/src/main/res/drawable/ic_settings.xml

@@ -5,5 +5,5 @@
     android:viewportWidth="24">
     <path
         android:fillColor="?android:attr/colorForeground"
-        android:pathData="M19.43,12.98c0.04,-0.32 0.07,-0.64 0.07,-0.98s-0.03,-0.66 -0.07,-0.98l2.11,-1.65c0.19,-0.15 0.24,-0.42 0.12,-0.64l-2,-3.46c-0.12,-0.22 -0.39,-0.3 -0.61,-0.22l-2.49,1c-0.52,-0.4 -1.08,-0.73 -1.69,-0.98l-0.38,-2.65C14.46,2.18 14.25,2 14,2h-4c-0.25,0 -0.46,0.18 -0.49,0.42l-0.38,2.65c-0.61,0.25 -1.17,0.59 -1.69,0.98l-2.49,-1c-0.23,-0.09 -0.49,0 -0.61,0.22l-2,3.46c-0.13,0.22 -0.07,0.49 0.12,0.64l2.11,1.65c-0.04,0.32 -0.07,0.65 -0.07,0.98s0.03,0.66 0.07,0.98l-2.11,1.65c-0.19,0.15 -0.24,0.42 -0.12,0.64l2,3.46c0.12,0.22 0.39,0.3 0.61,0.22l2.49,-1c0.52,0.4 1.08,0.73 1.69,0.98l0.38,2.65c0.03,0.24 0.24,0.42 0.49,0.42h4c0.25,0 0.46,-0.18 0.49,-0.42l0.38,-2.65c0.61,-0.25 1.17,-0.59 1.69,-0.98l2.49,1c0.23,0.09 0.49,0 0.61,-0.22l2,-3.46c0.12,-0.22 0.07,-0.49 -0.12,-0.64l-2.11,-1.65zM12,15.5c-1.93,0 -3.5,-1.57 -3.5,-3.5s1.57,-3.5 3.5,-3.5 3.5,1.57 3.5,3.5 -1.57,3.5 -3.5,3.5z" />
+        android:pathData="M12,8c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM12,10c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2zM12,16c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2z"/>
 </vector>

app/src/main/res/menu/main_activity.xml

@@ -6,5 +6,6 @@
         android:alphabeticShortcut="s"
         android:icon="@drawable/ic_settings"
         android:title="@string/settings"
-        app:showAsAction="never" />
+        app:showAsAction="always"
+        android:orderInCategory="1000" />
 </menu>

app/src/main/res/values/strings.xml

@@ -69,18 +69,22 @@
     <string name="toggle_error">Error toggling WireGuard tunnel: %s</string>
     <string name="tools_installer_already">wg and wg-quick are already installed</string>
     <string name="tools_installer_failure">Unable to install command-line tools (no root?)</string>
-    <string name="tools_installer_initial">Install optional tools for scripting into the system partition</string>
-    <string name="tools_installer_success">wg and wg-quick installed into the system partition</string>
+    <string name="tools_installer_initial">Install optional tools for scripting</string>
+    <string name="tools_installer_initial_system">Install optional tools for scripting into the system partition</string>
+    <string name="tools_installer_initial_magisk">Install optional tools for scripting as Magisk module</string>
+    <string name="tools_installer_success_system">wg and wg-quick installed into the system partition</string>
+    <string name="tools_installer_success_magisk">wg and wg-quick installed as a Magisk module (reboot required)</string>
     <string name="tools_installer_title">Install command line tools</string>
-    <string name="tools_installer_working">Installing wg and wg-quick into the system partition</string>
+    <string name="tools_installer_working_system">Installing wg and wg-quick into the system partition</string>
+    <string name="tools_installer_working_magisk">Installing wg and wg-quick as a Magisk module</string>
     <string name="tunnel_create_error">Unable to create tunnel: %s</string>
     <string name="tunnel_create_success">Successfully created tunnel “%s”</string>
     <string name="tunnel_rename_error">Unable to rename tunnel: %s</string>
     <string name="tunnel_rename_success">Successfully renamed tunnel to “%s”</string>
     <string name="version_title">WireGuard for Android v%s"</string>
-    <string name="version_kernel_summary">Kernel module backend v%s</string>
-    <string name="version_kernel_unknown_summary">Unknown kernel module version</string>
-    <string name="version_userspace_summary">Go userspace backend v%s</string>
+    <string name="version_summary">%s backend v%s</string>
+    <string name="version_summary_checking">Checking %s backend version</string>
+    <string name="version_summary_unknown">Unknown %s version</string>
     <string name="zip_exporter_title">Export tunnels to zip file</string>
     <string name="zip_export_error">Unable to export tunnels: %s</string>
     <string name="zip_export_success">Saved to %s</string>

app/src/main/res/values/styles.xml

@@ -9,7 +9,7 @@
         <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
     </style>
 
-    <style name="fab_label" parent="android:TextAppearance.DeviceDefault.Inverse">
+    <style name="fab_label" parent="TextAppearance.AppCompat.Inverse">
         <item name="android:background">@drawable/fab_label_background</item>
         <item name="android:textColor">@color/fab_label_text_color</item>
     </style>

app/tools/libwg-go/Makefile

@@ -29,7 +29,7 @@ GOBUILDVERSION_NEEDED := go version go$(GOBUILDVERSION) $(GOBUILDOS)/$(GOBUILDAR
 
 GOBUILDVERSION_CURRENT := $(shell go version 2>/dev/null)
 ifeq ($(GOBUILDVERSION_NEEDED),$(GOBUILDVERSION_CURRENT))
-$(info Using system go)
+$(info Using system Go)
 else
 export GOROOT := $(CURDIR)/goroot
 export PATH := $(GOROOT)/bin:$(PATH)
@@ -41,18 +41,18 @@ $(GOROOT)/bin/go:
 	rm -rf "$(GOROOT)"
 	mkdir -p "$(GOROOT)"
 	curl "$(GOBUILDTARBALL)" | tar -C "$(GOROOT)" --strip-components=1 -xzf - || { rm -rf "$(GOROOT)"; exit 1; }
-	patch -p1 -f -N -r- -d"$(GOROOT)" < goruntime-boottime-over-monotonic.diff || { rm -rf "$(GOROOT)"; exit 1; }
+	patch -p1 -f -N -r- -d "$(GOROOT)" < goruntime-boottime-over-monotonic.diff || { rm -rf "$(GOROOT)"; exit 1; }
 $(DESTDIR)/libwg-go.so: $(GOROOT)/bin/go
 endif
 
 $(shell test "$$(cat .gobuildversion 2>/dev/null)" = "$(GOBUILDVERSION_CURRENT)" || rm -f "$(DESTDIR)/libwg-go.so")
 
 $(DESTDIR)/libwg-go.so: $(FILES) src/git.zx2c4.com/wireguard-go/api-android.go src/git.zx2c4.com/wireguard-go/tun/api-android.go src/git.zx2c4.com/wireguard-go/jni.c
+	@goroot="$$(go env GOROOT)" || exit 1; patch -p1 -f -R -s --dry-run -d "$$goroot" < goruntime-boottime-over-monotonic.diff >/dev/null 2>&1 || { echo "ERROR: Your system's Go is not patched to use the suspend-aware monotonic clock. Please try again after having run: \`patch -p1 -d \"$$goroot\" < \"$(CURDIR)/goruntime-boottime-over-monotonic.diff\"\`."; exit 1; }
 	find . -name '*.go' -type l -delete
 	find . -type d -empty -delete
 	mkdir -p $(subst ../wireguard-go/,./src/git.zx2c4.com/wireguard-go/,$(dir $(FILES)))
 	$(foreach FILE,$(FILES),ln -sfrt $(subst ../wireguard-go/,./src/git.zx2c4.com/wireguard-go/,$(dir $(FILE))) $(FILE);)
-	patch -p1 -f -R -s --dry-run -d"$$(go env GOROOT)" < goruntime-boottime-over-monotonic.diff
 	GOPATH=$(PWD) go get -v -d git.zx2c4.com/wireguard-go
 	GOPATH=$(PWD) go build -v -o $(DESTDIR)/libwg-go.so -buildmode c-shared git.zx2c4.com/wireguard-go
 	go version > .gobuildversion

app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/api-android.go

@@ -161,8 +161,8 @@ func wgGetSocketV6(tunnelHandle int32) int32 {
 }
 
 //export wgVersion
-func wgVersion() string {
-	return WireGuardGoVersion
+func wgVersion() *C.char {
+	return C.CString(WireGuardGoVersion)
 }
 
 func main() {}

app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/jni.c

@@ -12,7 +12,7 @@ extern int wgTurnOn(struct go_string ifname, int tun_fd, struct go_string settin
 extern void wgTurnOff(int handle);
 extern int wgGetSocketV4(int handle);
 extern int wgGetSocketV6(int handle);
-extern struct go_string wgVersion();
+extern char *wgVersion();
 
 JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgTurnOn(JNIEnv *env, jclass c, jstring ifname, jint tun_fd, jstring settings)
 {
@@ -50,13 +50,10 @@ JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgGetSocketV
 JNIEXPORT jstring JNICALL Java_com_wireguard_android_backend_GoBackend_wgVersion(JNIEnv *env, jclass c)
 {
 	jstring ret;
-	struct go_string s = wgVersion();
-	char *cstr = malloc(s.n + 1);
-	if (!cstr)
+	char *version = wgVersion();
+	if (!version)
 		return NULL;
-	memcpy(cstr, s.str, s.n);
-	cstr[s.n] = '\0';
-	ret = (*env)->NewStringUTF(env, cstr);
-	free(cstr);
+	ret = (*env)->NewStringUTF(env, version);
+	free(version);
 	return ret;
 }