Implemented Yggdrasil start after device boot (#39)

Implemented Yggdrasil start after device boot (even if Always-On VPN disabled).

app/src/main/AndroidManifest.xml

@@ -5,6 +5,7 @@
     <uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
 
     <application
         android:name=".GlobalApplication"
@@ -13,7 +14,8 @@
         android:label="@string/app_name"
         android:roundIcon="@drawable/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.Yggdrasil">
+        android:theme="@style/Theme.Yggdrasil"
+        android:largeHeap="true">
         <activity android:name=".MainActivity" android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -57,6 +59,12 @@
                 <action android:name="android.service.quicksettings.action.QS_TILE" />
             </intent-filter>
         </service>
+
+        <receiver android:name=".BootUpReceiver" android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+            </intent-filter>
+        </receiver>
     </application>
 
 </manifest>

app/src/main/java/eu/neilalexander/yggdrasil/BootUpReceiver.kt

@@ -0,0 +1,40 @@
+package eu.neilalexander.yggdrasil
+
+import android.app.NotificationManager
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.net.VpnService
+import android.util.Log
+import androidx.preference.PreferenceManager
+
+class BootUpReceiver : BroadcastReceiver() {
+
+    companion object {
+        const val TAG = "BootUpReceiver"
+    }
+
+    override fun onReceive(context: Context, intent: Intent) {
+        if (intent.action != Intent.ACTION_BOOT_COMPLETED) {
+            Log.w(TAG, "Wrong action: ${intent.action}")
+        }
+        val preferences = PreferenceManager.getDefaultSharedPreferences(context)
+        if (!preferences.getBoolean(PREF_KEY_ENABLED, false)) {
+            Log.i(TAG, "Yggdrasil disabled, not starting service")
+            return
+        }
+        Log.i(TAG, "Yggdrasil enabled, starting service")
+        val serviceIntent = Intent(context, PacketTunnelProvider::class.java)
+        serviceIntent.action = PacketTunnelProvider.ACTION_START
+
+        val vpnIntent = VpnService.prepare(context)
+        if (vpnIntent != null) {
+            Log.i(TAG, "Need to ask for VPN permission")
+            val notification = createPermissionMissingNotification(context)
+            val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+            manager.notify(444, notification)
+        } else {
+            context.startService(serviceIntent)
+        }
+    }
+}

app/src/main/java/eu/neilalexander/yggdrasil/DnsActivity.kt

@@ -59,7 +59,7 @@ class DnsActivity : AppCompatActivity() {
             val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.Theme_MaterialComponents_DayNight_Dialog))
             builder.setTitle(getString(R.string.dns_add_server_dialog_title))
             builder.setView(view)
-            builder.setPositiveButton(getString(R.string.add)) { dialog, _ ->
+            builder.setPositiveButton(getString(R.string.add)) { _, _ ->
                 val server = input.text.toString()
                 if (!servers.contains(server)) {
                     servers.add(server)

app/src/main/java/eu/neilalexander/yggdrasil/GlobalApplication.kt

@@ -10,6 +10,7 @@ import androidx.annotation.RequiresApi
 import androidx.core.app.NotificationCompat
 
 const val PREF_KEY_ENABLED = "enabled"
+const val MAIN_CHANNEL_ID = "Yggdrasil Service"
 
 class GlobalApplication: Application(), YggStateReceiver.StateReceiver {
     private lateinit var config: ConfigurationProxy
@@ -62,21 +63,7 @@ class GlobalApplication: Application(), YggStateReceiver.StateReceiver {
 }
 
 fun createServiceNotification(context: Context, state: State): Notification {
-    // Create the NotificationChannel, but only on API 26+ because
-    // the NotificationChannel class is new and not in the support library
-    val channelId = "Foreground Service"
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-        val name = context.getString(R.string.channel_name)
-        val descriptionText = context.getString(R.string.channel_description)
-        val importance = NotificationManager.IMPORTANCE_MIN
-        val channel = NotificationChannel(channelId, name, importance).apply {
-            description = descriptionText
-        }
-        // Register the channel with the system
-        val notificationManager: NotificationManager =
-            context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
-        notificationManager.createNotificationChannel(channel)
-    }
+    createNotificationChannels(context)
 
     val intent = Intent(context, MainActivity::class.java).apply {
         this.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
@@ -90,11 +77,46 @@ fun createServiceNotification(context: Context, state: State): Notification {
         else -> context.getText(R.string.tile_disabled)
     }
 
-    return NotificationCompat.Builder(context, channelId)
+    return NotificationCompat.Builder(context, MAIN_CHANNEL_ID)
         .setShowWhen(false)
         .setContentTitle(text)
         .setSmallIcon(R.drawable.ic_tile_icon)
         .setContentIntent(pendingIntent)
         .setPriority(NotificationCompat.PRIORITY_MIN)
         .build()
+}
+
+fun createPermissionMissingNotification(context: Context): Notification {
+    createNotificationChannels(context)
+    val intent = Intent(context, MainActivity::class.java).apply {
+        this.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
+    }
+    val pendingIntent: PendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+
+    return NotificationCompat.Builder(context, MAIN_CHANNEL_ID)
+        .setShowWhen(false)
+        .setContentTitle(context.getText(R.string.app_name))
+        .setContentText(context.getText(R.string.permission_notification_text))
+        .setSmallIcon(R.drawable.ic_tile_icon)
+        .setContentIntent(pendingIntent)
+        .setAutoCancel(true)
+        .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+        .build()
+}
+
+private fun createNotificationChannels(context: Context) {
+    // Create the NotificationChannel, but only on API 26+ because
+    // the NotificationChannel class is new and not in the support library
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+        val name = context.getString(R.string.channel_name)
+        val descriptionText = context.getString(R.string.channel_description)
+        val importance = NotificationManager.IMPORTANCE_MIN
+        val channel = NotificationChannel(MAIN_CHANNEL_ID, name, importance).apply {
+            description = descriptionText
+        }
+        // Register the channel with the system
+        val notificationManager: NotificationManager =
+            context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        notificationManager.createNotificationChannel(channel)
+    }
 }

app/src/main/java/eu/neilalexander/yggdrasil/PacketTunnelProvider.kt

@@ -20,7 +20,7 @@ import kotlin.concurrent.thread
 private const val TAG = "PacketTunnelProvider"
 const val SERVICE_NOTIFICATION_ID = 1000
 
-class PacketTunnelProvider: VpnService() {
+open class PacketTunnelProvider: VpnService() {
     companion object {
         const val STATE_INTENT = "eu.neilalexander.yggdrasil.PacketTunnelProvider.STATE_MESSAGE"
 
@@ -68,9 +68,9 @@ class PacketTunnelProvider: VpnService() {
             ACTION_CONNECT -> {
                 Log.d(TAG, "Connecting...")
                 if (started.get()) {
-                    connect();
+                    connect()
                 } else {
-                    start();
+                    start()
                 }
                 START_STICKY
             }

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

@@ -75,4 +75,5 @@
     <string name="location_buffalo">Баффало, США</string>
     <string name="channel_name">Сервис VPN</string>
     <string name="channel_description">Главный канал нотификаций сервиса</string>
+    <string name="permission_notification_text">Нажмите здесь чтобы включить Yggdrasil.</string>
 </resources>

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

@@ -75,4 +75,5 @@
     <string name="location_buffalo">Buffalo, US</string>
     <string name="channel_name">VPN Service</string>
     <string name="channel_description">Main channel for foreground notification</string>
+    <string name="permission_notification_text">Tap here to enable Yggdrasil.</string>
 </resources>