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.Intent;
22import android.content.pm.ApplicationInfo;
23import android.content.pm.PackageManager;
24import android.net.IConnectivityManager;
25import android.os.Handler;
26import android.os.Message;
27import android.os.ServiceManager;
28import android.os.SystemClock;
29import android.util.Log;
30import android.view.View;
31import android.widget.Button;
32import android.widget.CompoundButton;
33import android.widget.ImageView;
34import android.widget.TextView;
35
36import com.android.internal.app.AlertActivity;
37import com.android.internal.net.VpnConfig;
38
39import java.io.DataInputStream;
40import java.io.FileInputStream;
41
42public class ManageDialog extends AlertActivity implements
43        DialogInterface.OnClickListener, Handler.Callback {
44    private static final String TAG = "VpnManage";
45
46    private VpnConfig mConfig;
47
48    private IConnectivityManager mService;
49
50    private TextView mDuration;
51    private TextView mDataTransmitted;
52    private TextView mDataReceived;
53    private boolean mDataRowsHidden;
54
55    private Handler mHandler;
56
57    @Override
58    protected void onResume() {
59        super.onResume();
60
61        if (getCallingPackage() != null) {
62            Log.e(TAG, getCallingPackage() + " cannot start this activity");
63            finish();
64            return;
65        }
66
67        try {
68            mConfig = getIntent().getParcelableExtra("config");
69
70            mService = IConnectivityManager.Stub.asInterface(
71                    ServiceManager.getService(Context.CONNECTIVITY_SERVICE));
72
73            View view = View.inflate(this, R.layout.manage, null);
74            if (mConfig.session != null) {
75                ((TextView) view.findViewById(R.id.session)).setText(mConfig.session);
76            }
77            mDuration = (TextView) view.findViewById(R.id.duration);
78            mDataTransmitted = (TextView) view.findViewById(R.id.data_transmitted);
79            mDataReceived = (TextView) view.findViewById(R.id.data_received);
80            mDataRowsHidden = true;
81
82            if (mConfig.legacy) {
83                mAlertParams.mIconId = android.R.drawable.ic_dialog_info;
84                mAlertParams.mTitle = getText(R.string.legacy_title);
85            } else {
86                PackageManager pm = getPackageManager();
87                ApplicationInfo app = pm.getApplicationInfo(mConfig.user, 0);
88                mAlertParams.mIcon = app.loadIcon(pm);
89                mAlertParams.mTitle = app.loadLabel(pm);
90            }
91            if (mConfig.configureIntent != null) {
92                mAlertParams.mPositiveButtonText = getText(R.string.configure);
93                mAlertParams.mPositiveButtonListener = this;
94            }
95            mAlertParams.mNeutralButtonText = getText(R.string.disconnect);
96            mAlertParams.mNeutralButtonListener = this;
97            mAlertParams.mNegativeButtonText = getText(android.R.string.cancel);
98            mAlertParams.mNegativeButtonListener = this;
99            mAlertParams.mView = view;
100            setupAlert();
101
102            if (mHandler == null) {
103                mHandler = new Handler(this);
104            }
105            mHandler.sendEmptyMessage(0);
106        } catch (Exception e) {
107            Log.e(TAG, "onResume", e);
108            finish();
109        }
110    }
111
112    @Override
113    protected void onPause() {
114        super.onPause();
115        if (!isFinishing()) {
116            finish();
117        }
118    }
119
120    @Override
121    public void onClick(DialogInterface dialog, int which) {
122        try {
123            if (which == DialogInterface.BUTTON_POSITIVE) {
124                mConfig.configureIntent.send();
125            } else if (which == DialogInterface.BUTTON_NEUTRAL) {
126                if (mConfig.legacy) {
127                    mService.prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN);
128                } else {
129                    mService.prepareVpn(mConfig.user, VpnConfig.LEGACY_VPN);
130                }
131            }
132        } catch (Exception e) {
133            Log.e(TAG, "onClick", e);
134            finish();
135        }
136    }
137
138    @Override
139    public boolean handleMessage(Message message) {
140        mHandler.removeMessages(0);
141
142        if (!isFinishing()) {
143            if (mConfig.startTime != 0) {
144                long seconds = (SystemClock.elapsedRealtime() - mConfig.startTime) / 1000;
145                mDuration.setText(String.format("%02d:%02d:%02d",
146                        seconds / 3600, seconds / 60 % 60, seconds % 60));
147            }
148
149            String[] numbers = getNumbers();
150            if (numbers != null) {
151                // First unhide the related data rows.
152                if (mDataRowsHidden) {
153                    findViewById(R.id.data_transmitted_row).setVisibility(View.VISIBLE);
154                    findViewById(R.id.data_received_row).setVisibility(View.VISIBLE);
155                    mDataRowsHidden = false;
156                }
157
158                // [1] and [2] are received data in bytes and packets.
159                mDataReceived.setText(getString(R.string.data_value_format,
160                        numbers[1], numbers[2]));
161
162                // [9] and [10] are transmitted data in bytes and packets.
163                mDataTransmitted.setText(getString(R.string.data_value_format,
164                        numbers[9], numbers[10]));
165            }
166            mHandler.sendEmptyMessageDelayed(0, 1000);
167        }
168        return true;
169    }
170
171    private String[] getNumbers() {
172        DataInputStream in = null;
173        try {
174            // See dev_seq_printf_stats() in net/core/dev.c.
175            in = new DataInputStream(new FileInputStream("/proc/net/dev"));
176            String prefix = mConfig.interfaze + ':';
177
178            while (true) {
179                String line = in.readLine().trim();
180                if (line.startsWith(prefix)) {
181                    String[] numbers = line.substring(prefix.length()).split(" +");
182                    for (int i = 1; i < 17; ++i) {
183                        if (!numbers[i].equals("0")) {
184                            return numbers;
185                        }
186                    }
187                    break;
188                }
189            }
190        } catch (Exception e) {
191            // ignore
192        } finally {
193            try {
194                in.close();
195            } catch (Exception e) {
196                // ignore
197            }
198        }
199        return null;
200    }
201}
202