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//
// Copyright 2017 Filippo "Fil" Bergamo <fil.bergamo@riseup.net>
//
// This file is part of RepWifiApp.
// This file is based upon the example file included in
// de.blinkt.openvpn package by Arne Schwabe.
//
// RepWifiApp 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.
//
// RepWifiApp 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 RepWifiApp. If not, see <http://www.gnu.org/licenses/>.
//
// ********************************************************************
package fil.libre.repwifiapp.helpers;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.IBinder;
import android.os.RemoteException;
import java.util.ArrayList;
import java.util.List;
import de.blinkt.openvpn.api.APIVpnProfile;
import de.blinkt.openvpn.api.IOpenVPNAPIService;
public class OpenVpnManager {
public static final String SERVICE_PACKAGE_NAME = "de.blinkt.openvpn";
public static final String APP_COMMON_NAME = "OpenVPN for Android";
public static final String PLACEHOLDER_APPNAME = "[VPN_EXT_APP]";
private static boolean VpnIsConnected;
private static OpenVpnManager _currentInstance;
protected IOpenVPNAPIService _vpnSvc;
private Activity _caller;
private ServiceConnection _svcConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
_vpnSvc = IOpenVPNAPIService.Stub.asInterface(service);
}
public void onServiceDisconnected(ComponentName className) {
_vpnSvc = null;
}
};
private OpenVpnManager(Activity c) throws Exception {
this._caller = c;
bindService();
}
private void bindService() throws Exception {
Intent intentGetService = new Intent(IOpenVPNAPIService.class.getName());
intentGetService.setPackage(SERVICE_PACKAGE_NAME);
if (!_caller.bindService(intentGetService, _svcConnection, Context.BIND_AUTO_CREATE)) {
throw new Exception("FAILED to bind to OpenVPN service!");
}
}
private void unbindService() {
_caller.unbindService(_svcConnection);
}
private Intent askApiPermissionsGetIntentInternal() throws RemoteException {
return _vpnSvc.prepare(_caller.getPackageName());
}
private boolean startVpnInternal(String profileUuid) {
if (profileUuid == null) {
Utils.logError("Invoked startVpn with null uuid");
return false;
}
if (_vpnSvc == null) {
Utils.logError("Invoked startVpn but inner service is null.");
return false;
}
try {
_vpnSvc.startProfile(profileUuid);
VpnIsConnected = true;
return true;
} catch (RemoteException e) {
Utils.logError("Exception while starting vpn.", e);
return false;
}
}
private boolean disconnectInternal() {
if (_vpnSvc == null) {
Utils.logDebug("Attempted to disconnect from VPN, but inner service is null");
VpnIsConnected = false;
return true;
}
try {
_vpnSvc.disconnect();
VpnIsConnected = false;
return true;
} catch (RemoteException e) {
Utils.logError("Exception while disconnecting from vpn.", e);
return false;
}
}
private List<String> getExistingProfilesInternal(){
try {
List<APIVpnProfile> list = _vpnSvc.getProfiles();
List<String> ret = new ArrayList<String>();
for (APIVpnProfile vp : list) {
ret.add(vp.mName);
}
return ret;
} catch (RemoteException e) {
Utils.logError("Exception while retrieving profiles from vpn service.", e);
return null;
}
}
private String getUuidFromNameInternal(String profileName) {
if (_vpnSvc == null) {
Utils.logError("Called getUuidFromName but inner service is null!");
return null;
}
try {
List<APIVpnProfile> list = _vpnSvc.getProfiles();
for (APIVpnProfile vp : list) {
if (vp.mName.equals(profileName)) {
return vp.mUUID;
}
}
return null;
} catch (RemoteException e) {
Utils.logError("Exception while retrieving profiles from vpn service.", e);
return null;
}
}
public void close() {
if (_vpnSvc != null) {
unbindService();
}
}
public static void initialize(Activity caller){
if (_currentInstance != null){
return;
}
try {
_currentInstance = new OpenVpnManager(caller);
} catch (Exception e) {
Utils.logError("Exception while initializing vpn manager.",e);
}
}
public static boolean isExternalAppInstalled(Activity caller) {
try {
ApplicationInfo i;
i = caller.getPackageManager().getApplicationInfo(SERVICE_PACKAGE_NAME, 0);
return (i != null);
} catch (NameNotFoundException e) {
return false;
}
}
public static boolean startVpn(String profileUuid){
if (_currentInstance == null){
return false;
}
return _currentInstance.startVpnInternal(profileUuid);
}
public static boolean disconnect(){
if (_currentInstance == null){
return false;
}
return _currentInstance.disconnectInternal();
}
public static boolean isVpnConnected(){
return VpnIsConnected;
}
public static String getUuidFromName(String profileName){
if (_currentInstance == null){
return null;
}
return _currentInstance.getUuidFromNameInternal(profileName);
}
public static List<String> getExistingProfiles(){
return _currentInstance.getExistingProfilesInternal();
}
public static Intent askApiPermissionsGetIntent() throws RemoteException{
return _currentInstance.askApiPermissionsGetIntentInternal();
}
}
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