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
17package com.android.vpndialogs;
18
19import android.content.Context;
20import android.content.DialogInterface;
21import android.content.pm.PackageManager;
22import android.graphics.drawable.Drawable;
23import android.net.IConnectivityManager;
24import android.os.Bundle;
25import android.os.RemoteException;
26import android.os.ServiceManager;
27import android.os.UserHandle;
28import android.os.UserManager;
29import android.text.Html;
30import android.text.Html.ImageGetter;
31import android.util.Log;
32import android.view.View;
33import android.widget.Button;
34import android.widget.TextView;
35
36import com.android.internal.app.AlertActivity;
37import com.android.internal.net.VpnConfig;
38
39public 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
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
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
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
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
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
120    public void onBackPressed() {
121    }
122
123    @Override
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