From 1ec9eb737e465de3d215b903c4c91c75696c75ec Mon Sep 17 00:00:00 2001 From: Arne Schwabe Date: Thu, 13 Feb 2014 16:33:39 +0100 Subject: Implement demo to show OpenVPN for Android API --- remoteExample/src/main/AndroidManifest.xml | 12 +- .../aidl/de/blinkt/openvpn/api/APIVpnProfile.aidl | 3 + .../de/blinkt/openvpn/api/IOpenVPNAPIService.aidl | 50 ++++ .../blinkt/openvpn/api/IOpenVPNStatusCallback.aidl | 13 + remoteExample/src/main/assets/hd.conf | 61 ++++ .../java/de/blinkt/openvpn/api/APIVpnProfile.java | 51 ++++ .../de/blinkt/openvpn/remote/MainFragment.java | 310 ++++++++++++++++++++- .../src/main/res/drawable-hdpi/ic_launcher.png | Bin 0 -> 1447 bytes .../src/main/res/drawable-hdpi/ic_launcher2.png | Bin 7783 -> 0 bytes .../src/main/res/drawable-mdpi/ic_launcher.png | Bin 0 -> 917 bytes .../src/main/res/drawable-mdpi/ic_launcher2.png | Bin 3760 -> 0 bytes .../src/main/res/drawable-xhdpi/ic_launcher.png | Bin 0 -> 1984 bytes .../src/main/res/drawable-xhdpi/ic_launcher2.png | Bin 12356 -> 0 bytes .../src/main/res/drawable-xxhdpi/ic_launcher2.png | Bin 24780 -> 0 bytes .../src/main/res/layout/fragment_main.xml | 62 ++++- remoteExample/src/main/res/values/strings.xml | 4 +- 16 files changed, 557 insertions(+), 9 deletions(-) create mode 100644 remoteExample/src/main/aidl/de/blinkt/openvpn/api/APIVpnProfile.aidl create mode 100644 remoteExample/src/main/aidl/de/blinkt/openvpn/api/IOpenVPNAPIService.aidl create mode 100644 remoteExample/src/main/aidl/de/blinkt/openvpn/api/IOpenVPNStatusCallback.aidl create mode 100644 remoteExample/src/main/assets/hd.conf create mode 100644 remoteExample/src/main/java/de/blinkt/openvpn/api/APIVpnProfile.java create mode 100644 remoteExample/src/main/res/drawable-hdpi/ic_launcher.png delete mode 100644 remoteExample/src/main/res/drawable-hdpi/ic_launcher2.png create mode 100644 remoteExample/src/main/res/drawable-mdpi/ic_launcher.png delete mode 100644 remoteExample/src/main/res/drawable-mdpi/ic_launcher2.png create mode 100644 remoteExample/src/main/res/drawable-xhdpi/ic_launcher.png delete mode 100644 remoteExample/src/main/res/drawable-xhdpi/ic_launcher2.png delete mode 100644 remoteExample/src/main/res/drawable-xxhdpi/ic_launcher2.png (limited to 'remoteExample') diff --git a/remoteExample/src/main/AndroidManifest.xml b/remoteExample/src/main/AndroidManifest.xml index 4e922e56..1d76db58 100644 --- a/remoteExample/src/main/AndroidManifest.xml +++ b/remoteExample/src/main/AndroidManifest.xml @@ -2,9 +2,19 @@ + + + + + getProfiles(); + + void startProfile (String profileUUID); + + /** Use a profile with all certificates etc. embedded */ + boolean addVPNProfile (String name, String config); + + /** start a profile using an config */ + void startVPN (String inlineconfig); + + /** This permission framework is used to avoid confused deputy style attack to the VPN + * calling this will give null if the app is allowed to use the external API and an Intent + * that can be launched to request permissions otherwise */ + Intent prepare (String packagename); + + /** Used to trigger to the Android VPN permission dialog (VPNService.prepare()) in advance, + * if this return null OpenVPN for ANdroid already has the permissions otherwise you can start the returned Intent + * to let OpenVPN for Android request the permission */ + Intent prepareVPNService (); + + /* Disconnect the VPN */ + void disconnect(); + + /* Pause the VPN (same as using the pause feature in the notifcation bar) */ + void pause(); + + /* Resume the VPN (same as using the pause feature in the notifcation bar) */ + void resume(); + + /** + * Registers to receive OpenVPN Status Updates + */ + void registerStatusCallback(IOpenVPNStatusCallback cb); + + /** + * Remove a previously registered callback interface. + */ + void unregisterStatusCallback(IOpenVPNStatusCallback cb); + +} \ No newline at end of file diff --git a/remoteExample/src/main/aidl/de/blinkt/openvpn/api/IOpenVPNStatusCallback.aidl b/remoteExample/src/main/aidl/de/blinkt/openvpn/api/IOpenVPNStatusCallback.aidl new file mode 100644 index 00000000..1dfa1381 --- /dev/null +++ b/remoteExample/src/main/aidl/de/blinkt/openvpn/api/IOpenVPNStatusCallback.aidl @@ -0,0 +1,13 @@ +package de.blinkt.openvpn.api; + +/** + * Example of a callback interface used by IRemoteService to send + * synchronous notifications back to its clients. Note that this is a + * one-way interface so the server does not block waiting for the client. + */ +oneway interface IOpenVPNStatusCallback { + /** + * Called when the service has a new status for you. + */ + void newStatus(String uuid, String state, String message, String level); +} diff --git a/remoteExample/src/main/assets/hd.conf b/remoteExample/src/main/assets/hd.conf new file mode 100644 index 00000000..3dc917aa --- /dev/null +++ b/remoteExample/src/main/assets/hd.conf @@ -0,0 +1,61 @@ +# This config does not work, +# it only thought as demo to show starting a profile +client + +proto tcp +dev tun +topology subnet + +remote openvpn.blinkt.de 2000 +tls-remote openvpn.blinkt.de + + +wronguser +wrongpassword + + +comp-lzo + +-----BEGIN CERTIFICATE----- +MIIHPTCCBSWgAwIBAgIBADANBgkqhkiG9w0BAQQFADB5MRAwDgYDVQQKEwdSb290 +IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNB +IENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRA +Y2FjZXJ0Lm9yZzAeFw0wMzAzMzAxMjI5NDlaFw0zMzAzMjkxMjI5NDlaMHkxEDAO +BgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEi +MCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJ +ARYSc3VwcG9ydEBjYWNlcnQub3JnMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC +CgKCAgEAziLA4kZ97DYoB1CW8qAzQIxL8TtmPzHlawI229Z89vGIj053NgVBlfkJ +8BLPRoZzYLdufujAWGSuzbCtRRcMY/pnCujW0r8+55jE8Ez64AO7NV1sId6eINm6 +zWYyN3L69wj1x81YyY7nDl7qPv4coRQKFWyGhFtkZip6qUtTefWIonvuLwphK42y +fk1WpRPs6tqSnqxEQR5YYGUFZvjARL3LlPdCfgv3ZWiYUQXw8wWRBB0bF4LsyFe7 +w2t6iPGwcswlWyCR7BYCEo8y6RcYSNDHBS4CMEK4JZwFaz+qOqfrU0j36NK2B5jc +G8Y0f3/JHIJ6BVgrCFvzOKKrF11myZjXnhCLotLddJr3cQxyYN/Nb5gznZY0dj4k +epKwDpUeb+agRThHqtdB7Uq3EvbXG4OKDy7YCbZZ16oE/9KTfWgu3YtLq1i6L43q +laegw1SJpfvbi1EinbLDvhG+LJGGi5Z4rSDTii8aP8bQUWWHIbEZAWV/RRyH9XzQ +QUxPKZgh/TMfdQwEUfoZd9vUFBzugcMd9Zi3aQaRIt0AUMyBMawSB3s42mhb5ivU +fslfrejrckzzAeVLIL+aplfKkQABi6F1ITe1Yw1nPkZPcCBnzsXWWdsC4PDSy826 +YreQQejdIOQpvGQpQsgi3Hia/0PsmBsJUUtaWsJx8cTLc6nloQsCAwEAAaOCAc4w +ggHKMB0GA1UdDgQWBBQWtTIb1Mfz4OaO873SsDrusjkY0TCBowYDVR0jBIGbMIGY +gBQWtTIb1Mfz4OaO873SsDrusjkY0aF9pHsweTEQMA4GA1UEChMHUm9vdCBDQTEe +MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0 +IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy +dC5vcmeCAQAwDwYDVR0TAQH/BAUwAwEB/zAyBgNVHR8EKzApMCegJaAjhiFodHRw +czovL3d3dy5jYWNlcnQub3JnL3Jldm9rZS5jcmwwMAYJYIZIAYb4QgEEBCMWIWh0 +dHBzOi8vd3d3LmNhY2VydC5vcmcvcmV2b2tlLmNybDA0BglghkgBhvhCAQgEJxYl +aHR0cDovL3d3dy5jYWNlcnQub3JnL2luZGV4LnBocD9pZD0xMDBWBglghkgBhvhC +AQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg +b3ZlciB0byBodHRwOi8vd3d3LmNhY2VydC5vcmcwDQYJKoZIhvcNAQEEBQADggIB +ACjH7pyCArpcgBLKNQodgW+JapnM8mgPf6fhjViVPr3yBsOQWqy1YPaZQwGjiHCc +nWKdpIevZ1gNMDY75q1I08t0AoZxPuIrA2jxNGJARjtT6ij0rPtmlVOKTV39O9lg +18p5aTuxZZKmxoGCXJzN600BiqXfEVWqFcofN8CCmHBh22p8lqOOLlQ+TyGpkO/c +gr/c6EWtTZBzCDyUZbAEmXZ/4rzCahWqlwQ3JNgelE5tDlG+1sSPypZt90Pf6DBl +Jzt7u0NDY8RD97LsaMzhGY4i+5jhe1o+ATc7iwiwovOVThrLm82asduycPAtStvY +sONvRUgzEv/+PDIqVPfE94rwiCPCR/5kenHA0R6mY7AHfqQv0wGP3J8rtsYIqQ+T +SCX8Ev2fQtzzxD72V7DX3WnRBnc0CkvSyqD/HMaMyRa+xMwyN2hzXwj7UfdJUzYF +CpUCTPJ5GhD22Dp1nPMd8aINcGeGG7MW9S/lpOt5hvk9C8JzC6WZrG/8Z7jlLwum +GCSNe9FINSkYQKyTYOGWhlC0elnYjyELn8+CkcY7v2vcB5G5l1YjqrZslMZIBjzk +zk6q5PYvCdxTby78dOs6Y5nCpqyJvKeyRKANihDjbPIky/qbn3BHLt4Ui9SyIAmW +omTxJBzcoTWcFbLUvFUufQb1nA5V9FrWk9p2rSVzTMVD +-----END CERTIFICATE----- + +verb 2 diff --git a/remoteExample/src/main/java/de/blinkt/openvpn/api/APIVpnProfile.java b/remoteExample/src/main/java/de/blinkt/openvpn/api/APIVpnProfile.java new file mode 100644 index 00000000..f5591764 --- /dev/null +++ b/remoteExample/src/main/java/de/blinkt/openvpn/api/APIVpnProfile.java @@ -0,0 +1,51 @@ +package de.blinkt.openvpn.api; + +import android.os.Parcel; +import android.os.Parcelable; + +public class APIVpnProfile implements Parcelable { + + public final String mUUID; + public final String mName; + public final boolean mUserEditable; + + public APIVpnProfile(Parcel in) { + mUUID = in.readString(); + mName = in.readString(); + mUserEditable = in.readInt() != 0; + } + + public APIVpnProfile(String uuidString, String name, boolean userEditable) { + mUUID=uuidString; + mName = name; + mUserEditable=userEditable; + } + + @Override + public int describeContents() { + return 0; + } + + @Override + public void writeToParcel(Parcel dest, int flags) { + dest.writeString(mUUID); + dest.writeString(mName); + if(mUserEditable) + dest.writeInt(0); + else + dest.writeInt(1); + } + + public static final Parcelable.Creator CREATOR + = new Parcelable.Creator() { + public APIVpnProfile createFromParcel(Parcel in) { + return new APIVpnProfile(in); + } + + public APIVpnProfile[] newArray(int size) { + return new APIVpnProfile[size]; + } + }; + + +} diff --git a/remoteExample/src/main/java/de/blinkt/openvpn/remote/MainFragment.java b/remoteExample/src/main/java/de/blinkt/openvpn/remote/MainFragment.java index e14d7d3c..2ea37861 100644 --- a/remoteExample/src/main/java/de/blinkt/openvpn/remote/MainFragment.java +++ b/remoteExample/src/main/java/de/blinkt/openvpn/remote/MainFragment.java @@ -2,16 +2,320 @@ package de.blinkt.openvpn.remote; import android.app.Activity; import android.app.Fragment; +import android.content.ComponentName; +import android.content.Context; +import android.content.Intent; +import android.content.ServiceConnection; import android.os.Bundle; -import android.util.AttributeSet; +import android.os.Handler; +import android.os.IBinder; +import android.os.Message; +import android.os.RemoteException; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; +import android.widget.Button; +import android.widget.TextView; + +import java.io.BufferedReader; +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.lang.reflect.InvocationTargetException; +import java.net.InetSocketAddress; +import java.net.Socket; +import java.net.UnknownHostException; +import java.util.List; + +import de.blinkt.openvpn.api.APIVpnProfile; +import de.blinkt.openvpn.api.IOpenVPNAPIService; +import de.blinkt.openvpn.api.IOpenVPNStatusCallback; + +public class MainFragment extends Fragment implements View.OnClickListener, Handler.Callback { + + private TextView mHelloWorld; + private Button mStartVpn; + private TextView mMyIp; + private TextView mStatus; -public class MainFragment extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { - return inflater.inflate(R.layout.fragment_main,container,false); + View v = inflater.inflate(R.layout.fragment_main, container, false); + v.findViewById(R.id.disconnect).setOnClickListener(this); + v.findViewById(R.id.getMyIP).setOnClickListener(this); + v.findViewById(R.id.startembedded).setOnClickListener(this); + mHelloWorld = (TextView) v.findViewById(R.id.helloworld); + mStartVpn = (Button) v.findViewById(R.id.startVPN); + mStatus = (TextView) v.findViewById(R.id.status); + mMyIp = (TextView) v.findViewById(R.id.MyIpText); + + + return v; + + } + + private static final int MSG_UPDATE_STATE = 0; + private static final int MSG_UPDATE_MYIP = 1; + private static final int START_PROFILE_EMBEDDED = 2; + private static final int START_PROFILE_BYUUID = 3; + private static final int ICS_OPENVPN_PERMISSION = 7; + + protected IOpenVPNAPIService mService=null; + private Handler mHandler; + + + + + private void startEmbeddedProfile() + { + try { + InputStream conf = getActivity().getAssets().open("test.conf"); + InputStreamReader isr = new InputStreamReader(conf); + BufferedReader br = new BufferedReader(isr); + String config=""; + String line; + while(true) { + line = br.readLine(); + if(line == null) + break; + config += line + "\n"; + } + br.readLine(); + + // mService.addVPNProfile("test", config); + mService.startVPN(config); + } catch (IOException e) { + e.printStackTrace(); + } catch (RemoteException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } + } + + @Override + public void onStart() { + super.onStart(); + mHandler = new Handler(this); + bindService(); + } + + + private IOpenVPNStatusCallback mCallback = new IOpenVPNStatusCallback.Stub() { + /** + * This is called by the remote service regularly to tell us about + * new values. Note that IPC calls are dispatched through a thread + * pool running in each process, so the code executing here will + * NOT be running in our main thread like most other things -- so, + * to update the UI, we need to use a Handler to hop over there. + */ + + @Override + public void newStatus(String uuid, String state, String message, String level) + throws RemoteException { + Message msg = Message.obtain(mHandler, MSG_UPDATE_STATE, state + "|" + message); + msg.sendToTarget(); + + } + + }; + + + /** + * Class for interacting with the main interface of the service. + */ + private ServiceConnection mConnection = new ServiceConnection() { + public void onServiceConnected(ComponentName className, + IBinder service) { + // This is called when the connection with the service has been + // established, giving us the service object we can use to + // interact with the service. We are communicating with our + // service through an IDL interface, so get a client-side + // representation of that from the raw service object. + + mService = IOpenVPNAPIService.Stub.asInterface(service); + + try { + // Request permission to use the API + Intent i = mService.prepare(getActivity().getPackageName()); + if (i!=null) { + startActivityForResult(i, ICS_OPENVPN_PERMISSION); + } else { + onActivityResult(ICS_OPENVPN_PERMISSION, Activity.RESULT_OK,null); + } + + } catch (RemoteException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } + } + + public void onServiceDisconnected(ComponentName className) { + // This is called when the connection with the service has been + // unexpectedly disconnected -- that is, its process crashed. + mService = null; + + } + }; + private String mStartUUID=null; + + private void bindService() { + getActivity().bindService(new Intent(IOpenVPNAPIService.class.getName()), + mConnection, Context.BIND_AUTO_CREATE); + } + + protected void listVPNs() { + + try { + List list = mService.getProfiles(); + String all="List:"; + for(APIVpnProfile vp:list) { + all = all + vp.mName + ":" + vp.mUUID + "\n"; + } + + if(list.size()> 0) { + Button b= mStartVpn; + b.setOnClickListener(this); + b.setVisibility(View.VISIBLE); + b.setText(list.get(0).mName); + mStartUUID = list.get(0).mUUID; + } + + + + mHelloWorld.setText(all); + + } catch (RemoteException e) { + // TODO Auto-generated catch block + mHelloWorld.setText(e.getMessage()); + } + } + + private void unbindService() { + getActivity().unbindService(mConnection); + } + + @Override + public void onStop() { + super.onStop(); + unbindService(); + } + + @Override + public void onClick(View v) { + switch (v.getId()) { + case R.id.startVPN: + try { + prepareStartProfile(START_PROFILE_BYUUID); + } catch (RemoteException e) { + e.printStackTrace(); + } + break; + case R.id.disconnect: + try { + mService.disconnect(); + } catch (RemoteException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } + break; + case R.id.getMyIP: + + // Socket handling is not allowed on main thread + new Thread() { + + @Override + public void run() { + try { + String myip = getMyOwnIP(); + Message msg = Message.obtain(mHandler,MSG_UPDATE_MYIP,myip); + msg.sendToTarget(); + } catch (Exception e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } + + } + }.start(); + + break; + case R.id.startembedded: + try { + prepareStartProfile(START_PROFILE_EMBEDDED); + } catch (RemoteException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } + break; + default: + break; + } + + } + + private void prepareStartProfile(int requestCode) throws RemoteException { + Intent requestpermission = mService.prepareVPNService(); + if(requestpermission == null) { + onActivityResult(requestCode, Activity.RESULT_OK, null); + } else { + // Have to call an external Activity since services cannot used onActivityResult + startActivityForResult(requestpermission, requestCode); + } + } + + public void onActivityResult(int requestCode, int resultCode, Intent data) { + if (resultCode == Activity.RESULT_OK) { + if(requestCode==START_PROFILE_EMBEDDED) + startEmbeddedProfile(); + if(requestCode==START_PROFILE_BYUUID) + try { + mService.startProfile(mStartUUID); + } catch (RemoteException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } + if (requestCode == ICS_OPENVPN_PERMISSION) { + listVPNs(); + try { + mService.registerStatusCallback(mCallback); + } catch (RemoteException e) { + e.printStackTrace(); + } + + } + } + }; + + String getMyOwnIP() throws UnknownHostException, IOException, RemoteException, + IllegalArgumentException, IllegalAccessException, InvocationTargetException, NoSuchMethodException + { + String resp=""; + Socket client = new Socket(); + // Setting Keep Alive forces creation of the underlying socket, otherwise getFD returns -1 + client.setKeepAlive(true); + + + client.connect(new InetSocketAddress("v4address.com", 23),20000); + client.shutdownOutput(); + BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream())); + while (true) { + String line = in.readLine(); + if( line == null) + return resp; + resp+=line; + } + + } + + + + @Override + public boolean handleMessage(Message msg) { + if(msg.what == MSG_UPDATE_STATE) { + mStatus.setText((CharSequence) msg.obj); + } else if (msg.what == MSG_UPDATE_MYIP) { + mMyIp.setText((CharSequence) msg.obj); + } + return true; } } \ No newline at end of file diff --git a/remoteExample/src/main/res/drawable-hdpi/ic_launcher.png b/remoteExample/src/main/res/drawable-hdpi/ic_launcher.png new file mode 100644 index 00000000..d4e4bdf6 Binary files /dev/null and b/remoteExample/src/main/res/drawable-hdpi/ic_launcher.png differ diff --git a/remoteExample/src/main/res/drawable-hdpi/ic_launcher2.png b/remoteExample/src/main/res/drawable-hdpi/ic_launcher2.png deleted file mode 100644 index 55621cc1..00000000 Binary files a/remoteExample/src/main/res/drawable-hdpi/ic_launcher2.png and /dev/null differ diff --git a/remoteExample/src/main/res/drawable-mdpi/ic_launcher.png b/remoteExample/src/main/res/drawable-mdpi/ic_launcher.png new file mode 100644 index 00000000..930cd9e7 Binary files /dev/null and b/remoteExample/src/main/res/drawable-mdpi/ic_launcher.png differ diff --git a/remoteExample/src/main/res/drawable-mdpi/ic_launcher2.png b/remoteExample/src/main/res/drawable-mdpi/ic_launcher2.png deleted file mode 100644 index 11ec2068..00000000 Binary files a/remoteExample/src/main/res/drawable-mdpi/ic_launcher2.png and /dev/null differ diff --git a/remoteExample/src/main/res/drawable-xhdpi/ic_launcher.png b/remoteExample/src/main/res/drawable-xhdpi/ic_launcher.png new file mode 100644 index 00000000..1fa27b61 Binary files /dev/null and b/remoteExample/src/main/res/drawable-xhdpi/ic_launcher.png differ diff --git a/remoteExample/src/main/res/drawable-xhdpi/ic_launcher2.png b/remoteExample/src/main/res/drawable-xhdpi/ic_launcher2.png deleted file mode 100644 index 7c02b784..00000000 Binary files a/remoteExample/src/main/res/drawable-xhdpi/ic_launcher2.png and /dev/null differ diff --git a/remoteExample/src/main/res/drawable-xxhdpi/ic_launcher2.png b/remoteExample/src/main/res/drawable-xxhdpi/ic_launcher2.png deleted file mode 100644 index 915d9144..00000000 Binary files a/remoteExample/src/main/res/drawable-xxhdpi/ic_launcher2.png and /dev/null differ diff --git a/remoteExample/src/main/res/layout/fragment_main.xml b/remoteExample/src/main/res/layout/fragment_main.xml index fef7793f..5069780c 100644 --- a/remoteExample/src/main/res/layout/fragment_main.xml +++ b/remoteExample/src/main/res/layout/fragment_main.xml @@ -6,11 +6,65 @@ android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" - tools:context="de.blinkt.openvpn.remote.MainActivity$PlaceholderFragment"> + tools:context="de.blinkt.openvpn.remote.MainFragment"> + + + + +