Initial commit

Hotspot works. VPN not yet.

mobile/.gitignore

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+/build
+
+# tests aren't ready yet
+/src/androidTest
+/src/test

mobile/build.gradle

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+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-kapt'
+
+android {
+    buildToolsVersion "27.0.3"
+    compileSdkVersion 27
+    defaultConfig {
+        applicationId "be.mygod.vpnhotspot"
+        minSdkVersion 21
+        targetSdkVersion 27
+        versionCode 1
+        versionName "0.0.1"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        vectorDrawables.useSupportLibrary true
+    }
+    buildTypes {
+        debug {
+            pseudoLocalesEnabled true
+        }
+        release {
+            shrinkResources true
+            minifyEnabled true
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    dataBinding.enabled = true
+}
+
+dependencies {
+    kapt "com.android.databinding:compiler:$androidPluginVersion"
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation "com.android.support:customtabs:$supportLibraryVersion"
+    implementation "com.android.support:preference-v14:$supportLibraryVersion"
+    implementation "com.takisoft.fix:preference-v7:$takisoftFixVersion"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlinVersion"
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.1'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
+}
+
+kapt.generateStubs = true

mobile/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

mobile/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="be.mygod.vpnhotspot">
+
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
+    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
+
+    <application
+        android:name=".App"
+        android:allowBackup="false"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+
+        <service
+            android:name=".HotspotService">
+        </service>
+    </application>
+
+</manifest>

mobile/src/main/java/be/mygod/vpnhotspot/App.kt

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+package be.mygod.vpnhotspot
+
+import android.app.Application
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.os.Build
+
+class App : Application() {
+    override fun onCreate() {
+        super.onCreate()
+        if (Build.VERSION.SDK_INT >= 26) getSystemService(NotificationManager::class.java)
+                .createNotificationChannel(NotificationChannel(HotspotService.CHANNEL,
+                        "Hotspot Service", NotificationManager.IMPORTANCE_LOW))
+    }
+}

mobile/src/main/java/be/mygod/vpnhotspot/HotspotService.kt

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+package be.mygod.vpnhotspot
+
+import android.app.Service
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.net.wifi.p2p.WifiP2pGroup
+import android.net.wifi.p2p.WifiP2pManager
+import android.os.Binder
+import android.os.Looper
+import android.support.v4.app.NotificationCompat
+import android.support.v4.content.ContextCompat
+import android.util.Log
+import android.widget.Toast
+
+class HotspotService : Service(), WifiP2pManager.ChannelListener {
+    companion object {
+        const val CHANNEL = "hotspot"
+        private const val TAG = "HotspotService"
+    }
+
+    enum class Status {
+        IDLE, STARTING, ACTIVE
+    }
+
+    inner class HotspotBinder : Binder() {
+        val service get() = this@HotspotService
+        val status get() = this@HotspotService.status
+        var data: MainActivity.Data? = null
+
+        fun shutdown() {
+            p2pManager.removeGroup(channel, object : WifiP2pManager.ActionListener {
+                override fun onSuccess() = clean()
+                override fun onFailure(reason: Int) {
+                    Toast.makeText(this@HotspotService, "Failed to remove P2P group (reason: $reason)",
+                            Toast.LENGTH_SHORT).show()
+                }
+            })
+        }
+    }
+
+    private lateinit var p2pManager: WifiP2pManager
+    private lateinit var channel: WifiP2pManager.Channel
+    private lateinit var group: WifiP2pGroup
+    private var receiver: BroadcastReceiver? = null
+    private val binder = HotspotBinder()
+
+    private var status = Status.IDLE
+        set(value) {
+            field = value
+            binder.data?.onStatusChanged()
+        }
+
+    override fun onBind(intent: Intent) = binder
+
+    override fun onCreate() {
+        super.onCreate()
+        p2pManager = getSystemService(Context.WIFI_P2P_SERVICE) as WifiP2pManager
+        onChannelDisconnected()
+    }
+
+    override fun onChannelDisconnected() {
+        channel = p2pManager.initialize(this, Looper.getMainLooper(), this)
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        if (status != Status.IDLE) return START_NOT_STICKY
+        status = Status.STARTING
+        initReceiver()
+        p2pManager.requestGroupInfo(channel, {
+            when {
+                it == null -> doStart()
+                it.isGroupOwner -> doStart(it)
+                else -> {
+                    Log.i(TAG, "Removing old group ($it)")
+                    p2pManager.removeGroup(channel, object : WifiP2pManager.ActionListener {
+                        override fun onSuccess() = doStart()
+                        override fun onFailure(reason: Int) {
+                            Toast.makeText(this@HotspotService, "Failed to remove old P2P group (reason: $reason)",
+                                    Toast.LENGTH_SHORT).show()
+                        }
+                    })
+                }
+            }
+        })
+        return START_NOT_STICKY
+    }
+
+    private fun doStart() {
+        p2pManager.createGroup(channel, object : WifiP2pManager.ActionListener, WifiP2pManager.GroupInfoListener {
+            private fun shutdown() {
+                startForeground(0, NotificationCompat.Builder(this@HotspotService, CHANNEL)
+                        .build())
+                clean()
+            }
+
+            private var tries = 0
+            override fun onSuccess() = p2pManager.requestGroupInfo(channel, this)
+            override fun onGroupInfoAvailable(group: WifiP2pGroup?) {
+                if (group != null && group.isGroupOwner) doStart(group) else if (tries < 10) {
+                    Thread.sleep(30L shl tries++)
+                    onSuccess()
+                } else {
+                    Log.w(TAG, "Unexpected group: $group")
+                    shutdown()
+                }
+            }
+
+            override fun onFailure(reason: Int) {
+                Toast.makeText(this@HotspotService, "Failed to create P2P group (reason: $reason)",
+                        Toast.LENGTH_SHORT).show()
+                shutdown()
+            }
+        })
+    }
+    private fun doStart(group: WifiP2pGroup) {
+        status = Status.ACTIVE
+        this.group = group
+        startForeground(1, NotificationCompat.Builder(this@HotspotService, CHANNEL)
+                .setColor(ContextCompat.getColor(this@HotspotService, R.color.colorPrimary))
+                .setContentTitle(group.networkName)
+                .setSubText(group.passphrase)
+                .setSmallIcon(R.drawable.ic_device_wifi_tethering)
+                .build())
+    }
+
+    private fun initReceiver() {
+        return
+        receiver = object : BroadcastReceiver() {
+            override fun onReceive(context: Context, intent: Intent) {
+                when (intent.action) {
+                    // TODO
+                }
+            }
+        }
+        registerReceiver(receiver, createIntentFilter(
+                WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION,
+                WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION,
+                WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION,
+                WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION))
+    }
+
+    private fun clean() {
+        status = Status.IDLE
+        stopForeground(true)
+    }
+
+    override fun onDestroy() {
+        if (status != Status.IDLE) binder.shutdown()
+        if (receiver != null) {
+            unregisterReceiver(receiver)
+            receiver = null
+        }
+        super.onDestroy()
+    }
+}

mobile/src/main/java/be/mygod/vpnhotspot/MainActivity.kt

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+package be.mygod.vpnhotspot
+
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.ServiceConnection
+import android.databinding.BaseObservable
+import android.databinding.Bindable
+import android.databinding.DataBindingUtil
+import android.os.Bundle
+import android.os.IBinder
+import android.support.v4.content.ContextCompat
+import android.support.v7.app.AppCompatActivity
+import be.mygod.vpnhotspot.databinding.MainActivityBinding
+
+class MainActivity : AppCompatActivity(), ServiceConnection {
+    inner class Data : BaseObservable() {
+        val switchEnabled: Boolean
+            @Bindable get() = when (binder?.status) {
+                HotspotService.Status.IDLE -> true
+                HotspotService.Status.ACTIVE -> true
+                else -> false
+            }
+        var serviceStarted: Boolean
+            @Bindable get() = when (binder?.status) {
+                HotspotService.Status.STARTING -> true
+                HotspotService.Status.ACTIVE -> true
+                else -> false
+            }
+            set(value) {
+                val binder = binder
+                when (binder?.status) {
+                    HotspotService.Status.IDLE ->
+                        ContextCompat.startForegroundService(this@MainActivity,
+                                Intent(this@MainActivity, HotspotService::class.java))
+                    HotspotService.Status.ACTIVE -> binder.shutdown()
+                }
+            }
+
+        fun onStatusChanged() {
+            notifyPropertyChanged(BR.switchEnabled)
+            notifyPropertyChanged(BR.serviceStarted)
+        }
+        fun onBinderChanged() {
+            onStatusChanged()
+        }
+    }
+
+    private lateinit var binding: MainActivityBinding
+    private val data = Data()
+    private var binder: HotspotService.HotspotBinder? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = DataBindingUtil.setContentView(this, R.layout.main_activity)
+        binding.data = data
+    }
+
+    override fun onStart() {
+        super.onStart()
+        bindService(Intent(this, HotspotService::class.java), this, Context.BIND_AUTO_CREATE)
+    }
+
+    override fun onStop() {
+        unbindService(this)
+        super.onStop()
+    }
+
+    override fun onServiceConnected(name: ComponentName?, service: IBinder?) {
+        val binder = service as HotspotService.HotspotBinder
+        binder.data = data
+        this.binder = binder
+        data.onBinderChanged()
+    }
+
+    override fun onServiceDisconnected(name: ComponentName?) {
+        binder?.data = null
+        binder = null
+    }
+}

mobile/src/main/java/be/mygod/vpnhotspot/Utils.kt

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+package be.mygod.vpnhotspot
+
+import android.content.IntentFilter
+
+fun createIntentFilter(vararg actions: String): IntentFilter {
+    val result = IntentFilter()
+    actions.forEach { result.addAction(it) }
+    return result
+}

mobile/src/main/res/drawable/ic_device_wifi_tethering.xml

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+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M12,11c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2zM18,13c0,-3.31 -2.69,-6 -6,-6s-6,2.69 -6,6c0,2.22 1.21,4.15 3,5.19l1,-1.74c-1.19,-0.7 -2,-1.97 -2,-3.45 0,-2.21 1.79,-4 4,-4s4,1.79 4,4c0,1.48 -0.81,2.75 -2,3.45l1,1.74c1.79,-1.04 3,-2.97 3,-5.19zM12,3C6.48,3 2,7.48 2,13c0,3.7 2.01,6.92 4.99,8.65l1,-1.73C5.61,18.53 4,15.96 4,13c0,-4.42 3.58,-8 8,-8s8,3.58 8,8c0,2.96 -1.61,5.53 -4,6.92l1,1.73c2.99,-1.73 5,-4.95 5,-8.65 0,-5.52 -4.48,-10 -10,-10z"/>
+</vector>

mobile/src/main/res/layout/main_activity.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<layout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+    <data>
+        <variable
+            name="data"
+            type="be.mygod.vpnhotspot.MainActivity.Data"/>
+    </data>
+    <LinearLayout
+        android:orientation="vertical"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+        <android.support.v7.widget.Toolbar
+            android:layout_height="?attr/actionBarSize"
+            android:layout_width="match_parent"
+            android:background="?attr/colorPrimary"
+            android:elevation="4dp"
+            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
+            android:id="@+id/toolbar">
+
+            <Switch
+                android:id="@+id/switchService"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_marginEnd="16dp"
+                android:enabled="@{data.switchEnabled}"
+                android:checked="@{data.serviceStarted}"
+                android:onCheckedChanged="@{(_, checked) -> data.setServiceStarted(checked)}"
+                android:text="@string/app_name"
+                android:textAppearance="@style/TextAppearance.Widget.AppCompat.Toolbar.Title"/>
+        </android.support.v7.widget.Toolbar>
+
+        <GridLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:paddingBottom="8dp"
+            android:paddingEnd="16dp"
+            android:paddingStart="16dp"
+            android:paddingTop="8dp">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="Network name"
+                android:textAppearance="@style/TextAppearance.AppCompat.Subhead"/>
+
+            <Space
+                android:layout_width="8dp"
+                android:layout_height="0dp"
+                android:layout_column="1"
+                android:layout_row="0"/>
+
+            <TextView
+                android:id="@+id/textSsid"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_column="2"
+                android:layout_row="0"
+                tools:text="DIRECT-rAnd0m"/>
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_column="0"
+                android:layout_row="1"
+                android:text="Password"
+                android:textAppearance="@style/TextAppearance.AppCompat.Subhead"/>
+
+            <TextView
+                android:id="@+id/textPassword"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_column="2"
+                android:layout_row="1"
+                tools:text="p4ssW0rd"/>
+        </GridLayout>
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:paddingStart="16dp"
+            android:paddingEnd="16dp"
+            android:text="Connected devices"
+            android:textAppearance="@style/TextAppearance.AppCompat.Medium"/>
+
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="1dp"
+            android:background="#000"
+            android:backgroundTint="?android:attr/textColorSecondary"/>
+
+        <android.support.v7.widget.RecyclerView
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:paddingBottom="8dp"
+            android:paddingEnd="16dp"
+            android:paddingStart="16dp"
+            android:paddingTop="8dp"/>
+    </LinearLayout>
+</layout>

mobile/src/main/res/values/colors.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>

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

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+<resources>
+    <string name="app_name">VPN Hotspot</string>
+</resources>

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

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+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+</resources>