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/**
* Copyright (c) 2013 LEAP Encryption Access Project and contributers
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package se.leap.bitmaskclient;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.SharedPreferences;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.RemoteException;
import android.os.ResultReceiver;
import android.support.v4.app.Fragment;
import android.support.v7.widget.AppCompatImageView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import java.util.Observable;
import java.util.Observer;
import butterknife.ButterKnife;
import butterknife.InjectView;
import butterknife.OnClick;
import de.blinkt.openvpn.core.IOpenVPNServiceInternal;
import de.blinkt.openvpn.core.OpenVPNService;
import de.blinkt.openvpn.core.ProfileManager;
import de.blinkt.openvpn.core.VpnStatus;
import se.leap.bitmaskclient.eip.EIP;
import se.leap.bitmaskclient.eip.EipStatus;
import se.leap.bitmaskclient.eip.VoidVpnService;
import static android.view.View.GONE;
import static android.view.View.VISIBLE;
import static de.blinkt.openvpn.core.ConnectionStatus.LEVEL_NONETWORK;
import static se.leap.bitmaskclient.Constants.EIP_ACTION_CHECK_CERT_VALIDITY;
import static se.leap.bitmaskclient.Constants.EIP_ACTION_START;
import static se.leap.bitmaskclient.Constants.EIP_ACTION_STOP;
import static se.leap.bitmaskclient.Constants.EIP_ACTION_STOP_BLOCKING_VPN;
import static se.leap.bitmaskclient.Constants.EIP_ACTION_UPDATE;
import static se.leap.bitmaskclient.Constants.EIP_NOTIFICATION;
import static se.leap.bitmaskclient.Constants.EIP_RECEIVER;
import static se.leap.bitmaskclient.Constants.EIP_REQUEST;
import static se.leap.bitmaskclient.Constants.EIP_RESTART_ON_BOOT;
import static se.leap.bitmaskclient.Constants.PROVIDER_ALLOWED_REGISTERED;
import static se.leap.bitmaskclient.Constants.PROVIDER_ALLOW_ANONYMOUS;
import static se.leap.bitmaskclient.Constants.PROVIDER_VPN_CERTIFICATE;
import static se.leap.bitmaskclient.Constants.SHARED_PREFERENCES;
public class EipFragment extends Fragment implements Observer {
public static String TAG = EipFragment.class.getSimpleName();
protected static final String IS_CONNECTED = TAG + ".is_connected";
public static final String START_EIP_ON_BOOT = "start on boot";
private SharedPreferences preferences;
@InjectView(R.id.background)
AppCompatImageView background;
@InjectView(R.id.key)
AppCompatImageView key;
@InjectView(R.id.cirle)
AppCompatImageView circle;
@InjectView(R.id.vpn_main_button)
Button mainButton;
@InjectView(R.id.routed_text)
TextView routedText;
@InjectView(R.id.vpn_route)
TextView vpnRoute;
private EIPReceiver eipReceiver;
private EipStatus eipStatus;
private boolean wantsToConnect;
private IOpenVPNServiceInternal mService;
private ServiceConnection openVpnConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className,
IBinder service) {
mService = IOpenVPNServiceInternal.Stub.asInterface(service);
}
@Override
public void onServiceDisconnected(ComponentName arg0) {
mService = null;
}
};
public void onAttach(Context context) {
super.onAttach(context);
downloadEIPServiceConfig();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
eipStatus = EipStatus.getInstance();
eipStatus.addObserver(this);
eipReceiver = new EIPReceiver(new Handler());
preferences = getActivity().getSharedPreferences(SHARED_PREFERENCES, Context.MODE_PRIVATE);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.eip_service_fragment, container, false);
ButterKnife.inject(this, view);
Bundle arguments = getArguments();
if (arguments != null && arguments.containsKey(START_EIP_ON_BOOT) && arguments.getBoolean(START_EIP_ON_BOOT)) {
startEipFromScratch();
}
return view;
}
@Override
public void onResume() {
super.onResume();
//FIXME: avoid race conditions while checking certificate an logging in at about the same time
//eipCommand(Constants.EIP_ACTION_CHECK_CERT_VALIDITY);
handleNewState();
bindOpenVpnService();
}
@Override
public void onPause() {
super.onPause();
getActivity().unbindService(openVpnConnection);
}
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putBoolean(IS_CONNECTED, eipStatus.isConnected());
super.onSaveInstanceState(outState);
}
private void saveStatus(boolean restartOnBoot) {
preferences.edit().putBoolean(EIP_RESTART_ON_BOOT, restartOnBoot).apply();
}
@OnClick(R.id.vpn_main_button)
void onButtonClick() {
handleIcon();
}
@OnClick(R.id.key)
void onKeyClick() {
handleIcon();
}
@OnClick(R.id.cirle)
void onCircleClick() {
handleIcon();
}
void handleIcon() {
if (eipStatus.isConnected() || eipStatus.isConnecting())
handleSwitchOff();
else
handleSwitchOn();
}
private void handleSwitchOn() {
if (canStartEIP())
startEipFromScratch();
else if (canLogInToStartEIP()) {
wantsToConnect = true;
Bundle bundle = new Bundle();
MainActivity.sessionDialog(bundle);
} else {
Log.d(TAG, "WHAT IS GOING ON HERE?!");
// TODO: implement a fallback: check if vpncertificate was not downloaded properly or give
// a user feedback. A button that does nothing on click is not a good option
}
}
private boolean canStartEIP() {
boolean certificateExists = !preferences.getString(PROVIDER_VPN_CERTIFICATE, "").isEmpty();
boolean isAllowedAnon = preferences.getBoolean(PROVIDER_ALLOW_ANONYMOUS, false);
return (isAllowedAnon || certificateExists) && !eipStatus.isConnected() && !eipStatus.isConnecting();
}
private boolean canLogInToStartEIP() {
boolean isAllowedRegistered = preferences.getBoolean(PROVIDER_ALLOWED_REGISTERED, false);
boolean isLoggedIn = !LeapSRPSession.getToken().isEmpty();
return isAllowedRegistered && !isLoggedIn && !eipStatus.isConnecting() && !eipStatus.isConnected();
}
private void handleSwitchOff() {
if (eipStatus.isConnecting()) {
askPendingStartCancellation();
} else if (eipStatus.isConnected()) {
askToStopEIP();
}
}
private void askPendingStartCancellation() {
Activity activity = getActivity();
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(getActivity());
alertBuilder.setTitle(activity.getString(R.string.eip_cancel_connect_title))
.setMessage(activity.getString(R.string.eip_cancel_connect_text))
.setPositiveButton((android.R.string.yes), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
stopEipIfPossible();
}
})
.setNegativeButton(activity.getString(android.R.string.no), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
})
.show();
}
public void startEipFromScratch() {
wantsToConnect = false;
saveStatus(true);
eipCommand(EIP_ACTION_START);
}
private void stop() {
saveStatus(false);
if (eipStatus.isBlockingVpnEstablished()) {
stopBlockingVpn();
}
disconnect();
}
private void stopBlockingVpn() {
Log.d(TAG, "stop VoidVpn!");
Activity activity = getActivity();
Intent stopVoidVpnIntent = new Intent(activity, VoidVpnService.class);
stopVoidVpnIntent.setAction(EIP_ACTION_STOP_BLOCKING_VPN);
activity.startService(stopVoidVpnIntent);
}
private void disconnect() {
ProfileManager.setConntectedVpnProfileDisconnected(getActivity());
if (mService != null) {
try {
mService.stopVPN(false);
} catch (RemoteException e) {
VpnStatus.logException(e);
}
}
}
protected void stopEipIfPossible() {
//FIXME: no need to start a service here!
eipCommand(EIP_ACTION_STOP);
}
private void downloadEIPServiceConfig() {
ProviderAPIResultReceiver provider_api_receiver = new ProviderAPIResultReceiver(new Handler(), Dashboard.dashboardReceiver);
if(eipReceiver != null)
ProviderAPICommand.execute(Bundle.EMPTY, ProviderAPI.DOWNLOAD_EIP_SERVICE, provider_api_receiver);
}
protected void askToStopEIP() {
Activity activity = getActivity();
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(activity);
alertBuilder.setTitle(activity.getString(R.string.eip_cancel_connect_title))
.setMessage(activity.getString(R.string.eip_warning_browser_inconsistency))
.setPositiveButton((android.R.string.yes), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
stopEipIfPossible();
}
})
.setNegativeButton(activity.getString(android.R.string.no), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
})
.show();
}
protected void updateEipService() {
eipCommand(EIP_ACTION_UPDATE);
}
/**
* Send a command to EIP
*
* @param action A valid String constant from EIP class representing an Intent
* filter for the EIP class
*/
private void eipCommand(String action) {
Activity activity = getActivity();
// TODO validate "action"...how do we get the list of intent-filters for a class via Android API?
Intent vpn_intent = new Intent(activity.getApplicationContext(), EIP.class);
vpn_intent.setAction(action);
vpn_intent.putExtra(EIP_RECEIVER, eipReceiver);
activity.startService(vpn_intent);
}
@Override
public void update(Observable observable, Object data) {
if (observable instanceof EipStatus) {
eipStatus = (EipStatus) observable;
Activity activity = getActivity();
if (activity != null) {
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
handleNewState();
}
});
} else {
Log.e("EipFragment", "activity is null");
}
}
}
private void handleNewState() {
Activity activity = getActivity();
if (eipStatus.isConnecting()) {
mainButton.setText(activity.getString(android.R.string.cancel));
key.setImageResource(R.drawable.vpn_connecting);
routedText.setVisibility(GONE);
vpnRoute.setVisibility(GONE);
colorBackgroundALittle();
} else if (eipStatus.isConnected() || isOpenVpnRunningWithoutNetwork()) {
mainButton.setText(activity.getString(R.string.vpn_button_turn_off));
key.setImageResource(R.drawable.vpn_connected);
routedText.setVisibility(VISIBLE);
vpnRoute.setVisibility(VISIBLE);
vpnRoute.setText(ConfigHelper.getProviderName(preferences));
colorBackground();
} else {
mainButton.setText(activity.getString(R.string.vpn_button_turn_on));
key.setImageResource(R.drawable.vpn_disconnected);
routedText.setVisibility(GONE);
vpnRoute.setVisibility(GONE);
greyscaleBackground();
}
}
private boolean isOpenVpnRunningWithoutNetwork() {
boolean isRunning = false;
try {
isRunning = eipStatus.getLevel() == LEVEL_NONETWORK &&
mService.isVpnRunning();
} catch (Exception e) {
//eat me
e.printStackTrace();
}
return isRunning;
}
private void bindOpenVpnService() {
Activity activity = getActivity();
Intent intent = new Intent(activity, OpenVPNService.class);
intent.setAction(OpenVPNService.START_SERVICE);
activity.bindService(intent, openVpnConnection, Context.BIND_AUTO_CREATE);
}
protected class EIPReceiver extends ResultReceiver {
EIPReceiver(Handler handler) {
super(handler);
}
@Override
protected void onReceiveResult(int resultCode, Bundle resultData) {
super.onReceiveResult(resultCode, resultData);
String request = resultData.getString(EIP_REQUEST);
if (request == null) {
return;
}
switch (request) {
case EIP_ACTION_START:
switch (resultCode) {
case Activity.RESULT_OK:
break;
case Activity.RESULT_CANCELED:
break;
}
break;
case EIP_ACTION_STOP:
switch (resultCode) {
case Activity.RESULT_OK:
stop();
break;
case Activity.RESULT_CANCELED:
break;
}
break;
case EIP_NOTIFICATION:
switch (resultCode) {
case Activity.RESULT_OK:
break;
case Activity.RESULT_CANCELED:
break;
}
break;
case EIP_ACTION_CHECK_CERT_VALIDITY:
switch (resultCode) {
case Activity.RESULT_OK:
break;
case Activity.RESULT_CANCELED:
Dashboard.downloadVpnCertificate();
break;
}
break;
case EIP_ACTION_UPDATE:
switch (resultCode) {
case Activity.RESULT_OK:
if (wantsToConnect)
startEipFromScratch();
break;
case Activity.RESULT_CANCELED:
handleNewState();
break;
}
}
}
}
private void greyscaleBackground() {
ColorMatrix matrix = new ColorMatrix();
matrix.setSaturation(0);
ColorMatrixColorFilter cf = new ColorMatrixColorFilter(matrix);
background.setColorFilter(cf);
background.setImageAlpha(255);
}
private void colorBackgroundALittle() {
background.setColorFilter(null);
background.setImageAlpha(144);
}
private void colorBackground() {
background.setColorFilter(null);
background.setImageAlpha(255);
}
}
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