1 /*
2  * Copyright (C) 2011 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.vpndialogs;
18 
19 import android.content.Context;
20 import android.content.DialogInterface;
21 import android.content.pm.PackageManager;
22 import android.graphics.drawable.Drawable;
23 import android.net.IConnectivityManager;
24 import android.os.Bundle;
25 import android.os.RemoteException;
26 import android.os.ServiceManager;
27 import android.os.UserHandle;
28 import android.os.UserManager;
29 import android.text.Html;
30 import android.text.Html.ImageGetter;
31 import android.util.Log;
32 import android.view.View;
33 import android.widget.Button;
34 import android.widget.TextView;
35 
36 import com.android.internal.app.AlertActivity;
37 import com.android.internal.net.VpnConfig;
38 
39 public class ConfirmDialog extends AlertActivity
40         implements DialogInterface.OnClickListener, ImageGetter {
41     private static final String TAG = "VpnConfirm";
42 
43     private String mPackage;
44 
45     private IConnectivityManager mService;
46 
47     @Override
onCreate(Bundle savedInstanceState)48     protected void onCreate(Bundle savedInstanceState) {
49         super.onCreate(savedInstanceState);
50         mPackage = getCallingPackage();
51         mService = IConnectivityManager.Stub.asInterface(
52                 ServiceManager.getService(Context.CONNECTIVITY_SERVICE));
53 
54         if (prepareVpn()) {
55             setResult(RESULT_OK);
56             finish();
57             return;
58         }
59         if (UserManager.get(this).hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) {
60             finish();
61             return;
62         }
63         final String alwaysOnVpnPackage = getAlwaysOnVpnPackage();
64         // Can't prepare new vpn app when another vpn is always-on
65         if (alwaysOnVpnPackage != null && !alwaysOnVpnPackage.equals(mPackage)) {
66             finish();
67             return;
68         }
69         View view = View.inflate(this, R.layout.confirm, null);
70         ((TextView) view.findViewById(R.id.warning)).setText(
71                 Html.fromHtml(getString(R.string.warning, getVpnLabel()),
72                         this, null /* tagHandler */));
73         mAlertParams.mTitle = getText(R.string.prompt);
74         mAlertParams.mPositiveButtonText = getText(android.R.string.ok);
75         mAlertParams.mPositiveButtonListener = this;
76         mAlertParams.mNegativeButtonText = getText(android.R.string.cancel);
77         mAlertParams.mView = view;
78         setupAlert();
79 
80         getWindow().setCloseOnTouchOutside(false);
81         Button button = mAlert.getButton(DialogInterface.BUTTON_POSITIVE);
82         button.setFilterTouchesWhenObscured(true);
83     }
84 
getAlwaysOnVpnPackage()85     private String getAlwaysOnVpnPackage() {
86         try {
87            return mService.getAlwaysOnVpnPackage(UserHandle.myUserId());
88         } catch (RemoteException e) {
89             Log.e(TAG, "fail to call getAlwaysOnVpnPackage", e);
90             // Fallback to null to show the dialog
91             return null;
92         }
93     }
94 
prepareVpn()95     private boolean prepareVpn() {
96         try {
97             return mService.prepareVpn(mPackage, null, UserHandle.myUserId());
98         } catch (RemoteException e) {
99             throw new IllegalStateException(e);
100         }
101     }
102 
getVpnLabel()103     private CharSequence getVpnLabel() {
104         try {
105             return VpnConfig.getVpnLabel(this, mPackage);
106         } catch (PackageManager.NameNotFoundException e) {
107             throw new IllegalStateException(e);
108         }
109     }
110 
111     @Override
getDrawable(String source)112     public Drawable getDrawable(String source) {
113         // Should only reach this when fetching the VPN icon for the warning string.
114         Drawable icon = getDrawable(R.drawable.ic_vpn_dialog);
115         icon.setBounds(0, 0, icon.getIntrinsicWidth(), icon.getIntrinsicHeight());
116         return icon;
117     }
118 
119     @Override
onBackPressed()120     public void onBackPressed() {
121     }
122 
123     @Override
onClick(DialogInterface dialog, int which)124     public void onClick(DialogInterface dialog, int which) {
125         try {
126             if (mService.prepareVpn(null, mPackage, UserHandle.myUserId())) {
127                 // Authorize this app to initiate VPN connections in the future without user
128                 // intervention.
129                 mService.setVpnPackageAuthorization(mPackage, UserHandle.myUserId(), true);
130                 setResult(RESULT_OK);
131             }
132         } catch (Exception e) {
133             Log.e(TAG, "onClick", e);
134         }
135     }
136 }
137