Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 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.server.connectivity; |
| 18 | |
Paul Jensen | 49e3edf | 2015-05-22 10:50:39 -0400 | [diff] [blame] | 19 | import static android.net.CaptivePortal.APP_RETURN_DISMISSED; |
| 20 | import static android.net.CaptivePortal.APP_RETURN_UNWANTED; |
| 21 | import static android.net.CaptivePortal.APP_RETURN_WANTED_AS_IS; |
| 22 | |
Paul Jensen | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 23 | import android.app.AlarmManager; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 24 | import android.app.PendingIntent; |
| 25 | import android.content.BroadcastReceiver; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 26 | import android.content.Context; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 27 | import android.content.Intent; |
| 28 | import android.content.IntentFilter; |
Paul Jensen | 49e3edf | 2015-05-22 10:50:39 -0400 | [diff] [blame] | 29 | import android.net.CaptivePortal; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 30 | import android.net.ConnectivityManager; |
Paul Jensen | 49e3edf | 2015-05-22 10:50:39 -0400 | [diff] [blame] | 31 | import android.net.ICaptivePortal; |
Paul Jensen | 2c311d6 | 2014-11-17 12:34:51 -0500 | [diff] [blame] | 32 | import android.net.NetworkRequest; |
Paul Jensen | 8fe1742 | 2015-02-02 11:03:03 -0500 | [diff] [blame] | 33 | import android.net.ProxyInfo; |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 34 | import android.net.TrafficStats; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 35 | import android.net.Uri; |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 36 | import android.net.metrics.IpConnectivityLog; |
Hugo Benichi | cc92c6e | 2016-04-21 15:02:38 +0900 | [diff] [blame] | 37 | import android.net.metrics.NetworkEvent; |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 38 | import android.net.metrics.ValidationProbeEvent; |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 39 | import android.net.util.Stopwatch; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 40 | import android.net.wifi.WifiInfo; |
| 41 | import android.net.wifi.WifiManager; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 42 | import android.os.Handler; |
| 43 | import android.os.Message; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 44 | import android.os.SystemClock; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 45 | import android.os.UserHandle; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 46 | import android.provider.Settings; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 47 | import android.telephony.CellIdentityCdma; |
| 48 | import android.telephony.CellIdentityGsm; |
| 49 | import android.telephony.CellIdentityLte; |
| 50 | import android.telephony.CellIdentityWcdma; |
| 51 | import android.telephony.CellInfo; |
| 52 | import android.telephony.CellInfoCdma; |
| 53 | import android.telephony.CellInfoGsm; |
| 54 | import android.telephony.CellInfoLte; |
| 55 | import android.telephony.CellInfoWcdma; |
| 56 | import android.telephony.TelephonyManager; |
Paul Jensen | 2f0a897 | 2015-06-25 10:07:14 -0400 | [diff] [blame] | 57 | import android.text.TextUtils; |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 58 | import android.util.LocalLog; |
| 59 | import android.util.LocalLog.ReadOnlyLocalLog; |
Paul Jensen | 532b6143 | 2014-11-10 09:50:02 -0500 | [diff] [blame] | 60 | import android.util.Log; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 61 | |
Paul Jensen | d7b6ca9 | 2015-05-13 14:05:12 -0400 | [diff] [blame] | 62 | import com.android.internal.annotations.VisibleForTesting; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 63 | import com.android.internal.util.Protocol; |
| 64 | import com.android.internal.util.State; |
| 65 | import com.android.internal.util.StateMachine; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 66 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 67 | import java.io.IOException; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 68 | import java.net.HttpURLConnection; |
Paul Jensen | 2f0a897 | 2015-06-25 10:07:14 -0400 | [diff] [blame] | 69 | import java.net.InetAddress; |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 70 | import java.net.MalformedURLException; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 71 | import java.net.URL; |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 72 | import java.net.UnknownHostException; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 73 | import java.util.List; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 74 | import java.util.Random; |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 75 | import java.util.concurrent.CountDownLatch; |
| 76 | import java.util.concurrent.TimeUnit; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 77 | |
| 78 | /** |
| 79 | * {@hide} |
| 80 | */ |
| 81 | public class NetworkMonitor extends StateMachine { |
Erik Kline | a488c23 | 2016-04-15 15:49:42 +0900 | [diff] [blame] | 82 | private static final String TAG = NetworkMonitor.class.getSimpleName(); |
Hugo Benichi | a4f17bc | 2016-11-21 13:50:05 +0900 | [diff] [blame^] | 83 | private static final boolean DBG = true; |
| 84 | private static final boolean VDBG = false; |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 85 | |
Hugo Benichi | 11ae28f | 2016-09-27 13:16:19 +0900 | [diff] [blame] | 86 | // Default configuration values for captive portal detection probes. |
| 87 | // TODO: append a random length parameter to the default HTTPS url. |
| 88 | // TODO: randomize browser version ids in the default User-Agent String. |
| 89 | private static final String DEFAULT_HTTPS_URL = "https://www.google.com/generate_204"; |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 90 | private static final String DEFAULT_HTTP_URL = |
| 91 | "http://connectivitycheck.gstatic.com/generate_204"; |
Hugo Benichi | 11ae28f | 2016-09-27 13:16:19 +0900 | [diff] [blame] | 92 | private static final String DEFAULT_FALLBACK_URL = "http://www.google.com/gen_204"; |
| 93 | private static final String DEFAULT_USER_AGENT = "Mozilla/5.0 (X11; Linux x86_64) " |
| 94 | + "AppleWebKit/537.36 (KHTML, like Gecko) " |
| 95 | + "Chrome/52.0.2743.82 Safari/537.36"; |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 96 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 97 | private static final int SOCKET_TIMEOUT_MS = 10000; |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 98 | private static final int PROBE_TIMEOUT_MS = 3000; |
| 99 | |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 100 | public static final String ACTION_NETWORK_CONDITIONS_MEASURED = |
| 101 | "android.net.conn.NETWORK_CONDITIONS_MEASURED"; |
| 102 | public static final String EXTRA_CONNECTIVITY_TYPE = "extra_connectivity_type"; |
| 103 | public static final String EXTRA_NETWORK_TYPE = "extra_network_type"; |
| 104 | public static final String EXTRA_RESPONSE_RECEIVED = "extra_response_received"; |
| 105 | public static final String EXTRA_IS_CAPTIVE_PORTAL = "extra_is_captive_portal"; |
| 106 | public static final String EXTRA_CELL_ID = "extra_cellid"; |
| 107 | public static final String EXTRA_SSID = "extra_ssid"; |
| 108 | public static final String EXTRA_BSSID = "extra_bssid"; |
| 109 | /** real time since boot */ |
| 110 | public static final String EXTRA_REQUEST_TIMESTAMP_MS = "extra_request_timestamp_ms"; |
| 111 | public static final String EXTRA_RESPONSE_TIMESTAMP_MS = "extra_response_timestamp_ms"; |
| 112 | |
| 113 | private static final String PERMISSION_ACCESS_NETWORK_CONDITIONS = |
| 114 | "android.permission.ACCESS_NETWORK_CONDITIONS"; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 115 | |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 116 | // After a network has been tested this result can be sent with EVENT_NETWORK_TESTED. |
| 117 | // The network should be used as a default internet connection. It was found to be: |
| 118 | // 1. a functioning network providing internet access, or |
| 119 | // 2. a captive portal and the user decided to use it as is. |
| 120 | public static final int NETWORK_TEST_RESULT_VALID = 0; |
| 121 | // After a network has been tested this result can be sent with EVENT_NETWORK_TESTED. |
| 122 | // The network should not be used as a default internet connection. It was found to be: |
| 123 | // 1. a captive portal and the user is prompted to sign-in, or |
| 124 | // 2. a captive portal and the user did not want to use it, or |
| 125 | // 3. a broken network (e.g. DNS failed, connect failed, HTTP request failed). |
| 126 | public static final int NETWORK_TEST_RESULT_INVALID = 1; |
| 127 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 128 | private static final int BASE = Protocol.BASE_NETWORK_MONITOR; |
| 129 | |
| 130 | /** |
| 131 | * Inform NetworkMonitor that their network is connected. |
| 132 | * Initiates Network Validation. |
| 133 | */ |
| 134 | public static final int CMD_NETWORK_CONNECTED = BASE + 1; |
| 135 | |
| 136 | /** |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 137 | * Inform ConnectivityService that the network has been tested. |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 138 | * obj = String representing URL that Internet probe was redirect to, if it was redirected. |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 139 | * arg1 = One of the NETWORK_TESTED_RESULT_* constants. |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 140 | * arg2 = NetID. |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 141 | */ |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 142 | public static final int EVENT_NETWORK_TESTED = BASE + 2; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 143 | |
| 144 | /** |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 145 | * Message to self indicating it's time to evaluate a network's connectivity. |
| 146 | * arg1 = Token to ignore old messages. |
| 147 | */ |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 148 | private static final int CMD_REEVALUATE = BASE + 6; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 149 | |
| 150 | /** |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 151 | * Inform NetworkMonitor that the network has disconnected. |
| 152 | */ |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 153 | public static final int CMD_NETWORK_DISCONNECTED = BASE + 7; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 154 | |
| 155 | /** |
| 156 | * Force evaluation even if it has succeeded in the past. |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 157 | * arg1 = UID responsible for requesting this reeval. Will be billed for data. |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 158 | */ |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 159 | public static final int CMD_FORCE_REEVALUATION = BASE + 8; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 160 | |
| 161 | /** |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 162 | * Message to self indicating captive portal app finished. |
Paul Jensen | 49e3edf | 2015-05-22 10:50:39 -0400 | [diff] [blame] | 163 | * arg1 = one of: APP_RETURN_DISMISSED, |
| 164 | * APP_RETURN_UNWANTED, |
| 165 | * APP_RETURN_WANTED_AS_IS |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 166 | * obj = mCaptivePortalLoggedInResponseToken as String |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 167 | */ |
Paul Jensen | 49e3edf | 2015-05-22 10:50:39 -0400 | [diff] [blame] | 168 | private static final int CMD_CAPTIVE_PORTAL_APP_FINISHED = BASE + 9; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 169 | |
| 170 | /** |
| 171 | * Request ConnectivityService display provisioning notification. |
| 172 | * arg1 = Whether to make the notification visible. |
Paul Jensen | fdc4e4a | 2014-07-15 12:07:36 -0400 | [diff] [blame] | 173 | * arg2 = NetID. |
| 174 | * obj = Intent to be launched when notification selected by user, null if !arg1. |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 175 | */ |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 176 | public static final int EVENT_PROVISIONING_NOTIFICATION = BASE + 10; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 177 | |
| 178 | /** |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 179 | * Message to self indicating sign-in app should be launched. |
| 180 | * Sent by mLaunchCaptivePortalAppBroadcastReceiver when the |
| 181 | * user touches the sign in notification. |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 182 | */ |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 183 | private static final int CMD_LAUNCH_CAPTIVE_PORTAL_APP = BASE + 11; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 184 | |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 185 | /** |
| 186 | * Retest network to see if captive portal is still in place. |
| 187 | * arg1 = UID responsible for requesting this reeval. Will be billed for data. |
| 188 | * 0 indicates self-initiated, so nobody to blame. |
| 189 | */ |
| 190 | private static final int CMD_CAPTIVE_PORTAL_RECHECK = BASE + 12; |
| 191 | |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 192 | // Start mReevaluateDelayMs at this value and double. |
| 193 | private static final int INITIAL_REEVALUATE_DELAY_MS = 1000; |
| 194 | private static final int MAX_REEVALUATE_DELAY_MS = 10*60*1000; |
| 195 | // Before network has been evaluated this many times, ignore repeated reevaluate requests. |
| 196 | private static final int IGNORE_REEVALUATE_ATTEMPTS = 5; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 197 | private int mReevaluateToken = 0; |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 198 | private static final int INVALID_UID = -1; |
| 199 | private int mUidResponsibleForReeval = INVALID_UID; |
Paul Jensen | d9be23f | 2015-05-19 14:51:47 -0400 | [diff] [blame] | 200 | // Stop blaming UID that requested re-evaluation after this many attempts. |
| 201 | private static final int BLAME_FOR_EVALUATION_ATTEMPTS = 5; |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 202 | // Delay between reevaluations once a captive portal has been found. |
| 203 | private static final int CAPTIVE_PORTAL_REEVALUATE_DELAY_MS = 10*60*1000; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 204 | |
| 205 | private final Context mContext; |
| 206 | private final Handler mConnectivityServiceHandler; |
| 207 | private final NetworkAgentInfo mNetworkAgentInfo; |
Erik Kline | a488c23 | 2016-04-15 15:49:42 +0900 | [diff] [blame] | 208 | private final int mNetId; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 209 | private final TelephonyManager mTelephonyManager; |
| 210 | private final WifiManager mWifiManager; |
Paul Jensen | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 211 | private final AlarmManager mAlarmManager; |
Paul Jensen | 2c311d6 | 2014-11-17 12:34:51 -0500 | [diff] [blame] | 212 | private final NetworkRequest mDefaultRequest; |
Hugo Benichi | f9fdf87 | 2016-07-28 17:53:06 +0900 | [diff] [blame] | 213 | private final IpConnectivityLog mMetricsLog; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 214 | |
Calvin On | 4bc78eb | 2016-10-11 15:10:46 -0700 | [diff] [blame] | 215 | @VisibleForTesting |
| 216 | protected boolean mIsCaptivePortalCheckEnabled; |
| 217 | |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 218 | private boolean mUseHttps; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 219 | |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 220 | // Set if the user explicitly selected "Do not use this network" in captive portal sign-in app. |
| 221 | private boolean mUserDoesNotWant = false; |
Paul Jensen | 700f236 | 2015-05-05 14:56:10 -0400 | [diff] [blame] | 222 | // Avoids surfacing "Sign in to network" notification. |
| 223 | private boolean mDontDisplaySigninNotification = false; |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 224 | |
Robert Greenwalt | fb68f8f | 2014-08-13 13:43:32 -0700 | [diff] [blame] | 225 | public boolean systemReady = false; |
| 226 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 227 | private final State mDefaultState = new DefaultState(); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 228 | private final State mValidatedState = new ValidatedState(); |
| 229 | private final State mMaybeNotifyState = new MaybeNotifyState(); |
| 230 | private final State mEvaluatingState = new EvaluatingState(); |
| 231 | private final State mCaptivePortalState = new CaptivePortalState(); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 232 | |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 233 | private CustomIntentReceiver mLaunchCaptivePortalAppBroadcastReceiver = null; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 234 | |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 235 | private final LocalLog validationLogs = new LocalLog(20); // 20 lines |
| 236 | |
Erik Kline | a488c23 | 2016-04-15 15:49:42 +0900 | [diff] [blame] | 237 | private final Stopwatch mEvaluationTimer = new Stopwatch(); |
| 238 | |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 239 | // This variable is set before transitioning to the mCaptivePortalState. |
| 240 | private CaptivePortalProbeResult mLastPortalProbeResult = CaptivePortalProbeResult.FAILED; |
| 241 | |
Paul Jensen | 2c311d6 | 2014-11-17 12:34:51 -0500 | [diff] [blame] | 242 | public NetworkMonitor(Context context, Handler handler, NetworkAgentInfo networkAgentInfo, |
| 243 | NetworkRequest defaultRequest) { |
Hugo Benichi | f9fdf87 | 2016-07-28 17:53:06 +0900 | [diff] [blame] | 244 | this(context, handler, networkAgentInfo, defaultRequest, new IpConnectivityLog()); |
| 245 | } |
| 246 | |
| 247 | @VisibleForTesting |
| 248 | protected NetworkMonitor(Context context, Handler handler, NetworkAgentInfo networkAgentInfo, |
| 249 | NetworkRequest defaultRequest, IpConnectivityLog logger) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 250 | // Add suffix indicating which NetworkMonitor we're talking about. |
| 251 | super(TAG + networkAgentInfo.name()); |
| 252 | |
| 253 | mContext = context; |
Hugo Benichi | f9fdf87 | 2016-07-28 17:53:06 +0900 | [diff] [blame] | 254 | mMetricsLog = logger; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 255 | mConnectivityServiceHandler = handler; |
| 256 | mNetworkAgentInfo = networkAgentInfo; |
Erik Kline | a488c23 | 2016-04-15 15:49:42 +0900 | [diff] [blame] | 257 | mNetId = mNetworkAgentInfo.network.netId; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 258 | mTelephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); |
| 259 | mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); |
Paul Jensen | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 260 | mAlarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); |
Paul Jensen | 2c311d6 | 2014-11-17 12:34:51 -0500 | [diff] [blame] | 261 | mDefaultRequest = defaultRequest; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 262 | |
| 263 | addState(mDefaultState); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 264 | addState(mValidatedState, mDefaultState); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 265 | addState(mMaybeNotifyState, mDefaultState); |
| 266 | addState(mEvaluatingState, mMaybeNotifyState); |
| 267 | addState(mCaptivePortalState, mMaybeNotifyState); |
Robert Greenwalt | 49f63fb | 2014-09-13 12:04:12 -0700 | [diff] [blame] | 268 | setInitialState(mDefaultState); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 269 | |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 270 | mIsCaptivePortalCheckEnabled = Settings.Global.getInt(mContext.getContentResolver(), |
Calvin On | 4bc78eb | 2016-10-11 15:10:46 -0700 | [diff] [blame] | 271 | Settings.Global.CAPTIVE_PORTAL_MODE, Settings.Global.CAPTIVE_PORTAL_MODE_PROMPT) |
| 272 | != Settings.Global.CAPTIVE_PORTAL_MODE_IGNORE; |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 273 | mUseHttps = Settings.Global.getInt(mContext.getContentResolver(), |
| 274 | Settings.Global.CAPTIVE_PORTAL_USE_HTTPS, 1) == 1; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 275 | |
| 276 | start(); |
| 277 | } |
| 278 | |
Paul Jensen | 532b6143 | 2014-11-10 09:50:02 -0500 | [diff] [blame] | 279 | @Override |
| 280 | protected void log(String s) { |
Paul Jensen | 22e547a | 2015-06-25 09:17:53 -0400 | [diff] [blame] | 281 | if (DBG) Log.d(TAG + "/" + mNetworkAgentInfo.name(), s); |
Paul Jensen | 532b6143 | 2014-11-10 09:50:02 -0500 | [diff] [blame] | 282 | } |
| 283 | |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 284 | private void validationLog(String s) { |
| 285 | if (DBG) log(s); |
| 286 | validationLogs.log(s); |
| 287 | } |
| 288 | |
| 289 | public ReadOnlyLocalLog getValidationLogs() { |
| 290 | return validationLogs.readOnlyLocalLog(); |
| 291 | } |
| 292 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 293 | // DefaultState is the parent of all States. It exists only to handle CMD_* messages but |
| 294 | // does not entail any real state (hence no enter() or exit() routines). |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 295 | private class DefaultState extends State { |
| 296 | @Override |
| 297 | public boolean processMessage(Message message) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 298 | switch (message.what) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 299 | case CMD_NETWORK_CONNECTED: |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 300 | logNetworkEvent(NetworkEvent.NETWORK_CONNECTED); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 301 | transitionTo(mEvaluatingState); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 302 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 303 | case CMD_NETWORK_DISCONNECTED: |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 304 | logNetworkEvent(NetworkEvent.NETWORK_DISCONNECTED); |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 305 | if (mLaunchCaptivePortalAppBroadcastReceiver != null) { |
| 306 | mContext.unregisterReceiver(mLaunchCaptivePortalAppBroadcastReceiver); |
| 307 | mLaunchCaptivePortalAppBroadcastReceiver = null; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 308 | } |
Robert Greenwalt | 1fd9aee | 2014-07-17 16:11:38 -0700 | [diff] [blame] | 309 | quit(); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 310 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 311 | case CMD_FORCE_REEVALUATION: |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 312 | case CMD_CAPTIVE_PORTAL_RECHECK: |
Paul Jensen | 22e547a | 2015-06-25 09:17:53 -0400 | [diff] [blame] | 313 | log("Forcing reevaluation for UID " + message.arg1); |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 314 | mUidResponsibleForReeval = message.arg1; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 315 | transitionTo(mEvaluatingState); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 316 | return HANDLED; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 317 | case CMD_CAPTIVE_PORTAL_APP_FINISHED: |
Paul Jensen | 22e547a | 2015-06-25 09:17:53 -0400 | [diff] [blame] | 318 | log("CaptivePortal App responded with " + message.arg1); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 319 | |
| 320 | // If the user has seen and acted on a captive portal notification, and the |
| 321 | // captive portal app is now closed, disable HTTPS probes. This avoids the |
| 322 | // following pathological situation: |
| 323 | // |
| 324 | // 1. HTTP probe returns a captive portal, HTTPS probe fails or times out. |
| 325 | // 2. User opens the app and logs into the captive portal. |
| 326 | // 3. HTTP starts working, but HTTPS still doesn't work for some other reason - |
| 327 | // perhaps due to the network blocking HTTPS? |
| 328 | // |
| 329 | // In this case, we'll fail to validate the network even after the app is |
| 330 | // dismissed. There is now no way to use this network, because the app is now |
| 331 | // gone, so the user cannot select "Use this network as is". |
| 332 | mUseHttps = false; |
| 333 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 334 | switch (message.arg1) { |
Paul Jensen | 49e3edf | 2015-05-22 10:50:39 -0400 | [diff] [blame] | 335 | case APP_RETURN_DISMISSED: |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 336 | sendMessage(CMD_FORCE_REEVALUATION, 0 /* no UID */, 0); |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 337 | break; |
Paul Jensen | 49e3edf | 2015-05-22 10:50:39 -0400 | [diff] [blame] | 338 | case APP_RETURN_WANTED_AS_IS: |
Paul Jensen | 700f236 | 2015-05-05 14:56:10 -0400 | [diff] [blame] | 339 | mDontDisplaySigninNotification = true; |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 340 | // TODO: Distinguish this from a network that actually validates. |
| 341 | // Displaying the "!" on the system UI icon may still be a good idea. |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 342 | transitionTo(mValidatedState); |
| 343 | break; |
Paul Jensen | 49e3edf | 2015-05-22 10:50:39 -0400 | [diff] [blame] | 344 | case APP_RETURN_UNWANTED: |
Paul Jensen | 700f236 | 2015-05-05 14:56:10 -0400 | [diff] [blame] | 345 | mDontDisplaySigninNotification = true; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 346 | mUserDoesNotWant = true; |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 347 | mConnectivityServiceHandler.sendMessage(obtainMessage( |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 348 | EVENT_NETWORK_TESTED, NETWORK_TEST_RESULT_INVALID, |
Erik Kline | a488c23 | 2016-04-15 15:49:42 +0900 | [diff] [blame] | 349 | mNetId, null)); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 350 | // TODO: Should teardown network. |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 351 | mUidResponsibleForReeval = 0; |
| 352 | transitionTo(mEvaluatingState); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 353 | break; |
| 354 | } |
| 355 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 356 | default: |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 357 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 358 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 359 | } |
| 360 | } |
| 361 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 362 | // Being in the ValidatedState State indicates a Network is: |
| 363 | // - Successfully validated, or |
| 364 | // - Wanted "as is" by the user, or |
Paul Jensen | cf4c2c6 | 2015-07-01 14:16:32 -0400 | [diff] [blame] | 365 | // - Does not satisfy the default NetworkRequest and so validation has been skipped. |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 366 | private class ValidatedState extends State { |
| 367 | @Override |
| 368 | public void enter() { |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 369 | maybeLogEvaluationResult(NetworkEvent.NETWORK_VALIDATED); |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 370 | mConnectivityServiceHandler.sendMessage(obtainMessage(EVENT_NETWORK_TESTED, |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 371 | NETWORK_TEST_RESULT_VALID, mNetworkAgentInfo.network.netId, null)); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 372 | } |
| 373 | |
| 374 | @Override |
| 375 | public boolean processMessage(Message message) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 376 | switch (message.what) { |
| 377 | case CMD_NETWORK_CONNECTED: |
| 378 | transitionTo(mValidatedState); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 379 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 380 | default: |
| 381 | return NOT_HANDLED; |
| 382 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 383 | } |
| 384 | } |
| 385 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 386 | // Being in the MaybeNotifyState State indicates the user may have been notified that sign-in |
| 387 | // is required. This State takes care to clear the notification upon exit from the State. |
| 388 | private class MaybeNotifyState extends State { |
| 389 | @Override |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 390 | public boolean processMessage(Message message) { |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 391 | switch (message.what) { |
| 392 | case CMD_LAUNCH_CAPTIVE_PORTAL_APP: |
| 393 | final Intent intent = new Intent( |
| 394 | ConnectivityManager.ACTION_CAPTIVE_PORTAL_SIGN_IN); |
| 395 | intent.putExtra(ConnectivityManager.EXTRA_NETWORK, mNetworkAgentInfo.network); |
Paul Jensen | 49e3edf | 2015-05-22 10:50:39 -0400 | [diff] [blame] | 396 | intent.putExtra(ConnectivityManager.EXTRA_CAPTIVE_PORTAL, |
| 397 | new CaptivePortal(new ICaptivePortal.Stub() { |
| 398 | @Override |
| 399 | public void appResponse(int response) { |
| 400 | if (response == APP_RETURN_WANTED_AS_IS) { |
| 401 | mContext.enforceCallingPermission( |
| 402 | android.Manifest.permission.CONNECTIVITY_INTERNAL, |
| 403 | "CaptivePortal"); |
| 404 | } |
| 405 | sendMessage(CMD_CAPTIVE_PORTAL_APP_FINISHED, response); |
| 406 | } |
| 407 | })); |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 408 | intent.putExtra(ConnectivityManager.EXTRA_CAPTIVE_PORTAL_URL, |
| 409 | mLastPortalProbeResult.detectUrl); |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 410 | intent.setFlags( |
| 411 | Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT | Intent.FLAG_ACTIVITY_NEW_TASK); |
| 412 | mContext.startActivityAsUser(intent, UserHandle.CURRENT); |
| 413 | return HANDLED; |
| 414 | default: |
| 415 | return NOT_HANDLED; |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | @Override |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 420 | public void exit() { |
| 421 | Message message = obtainMessage(EVENT_PROVISIONING_NOTIFICATION, 0, |
| 422 | mNetworkAgentInfo.network.netId, null); |
| 423 | mConnectivityServiceHandler.sendMessage(message); |
| 424 | } |
| 425 | } |
| 426 | |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 427 | /** |
| 428 | * Result of calling isCaptivePortal(). |
| 429 | * @hide |
| 430 | */ |
| 431 | @VisibleForTesting |
| 432 | public static final class CaptivePortalProbeResult { |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 433 | static final CaptivePortalProbeResult FAILED = new CaptivePortalProbeResult(599); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 434 | |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 435 | private final int mHttpResponseCode; // HTTP response code returned from Internet probe. |
| 436 | final String redirectUrl; // Redirect destination returned from Internet probe. |
| 437 | final String detectUrl; // URL where a 204 response code indicates |
| 438 | // captive portal has been appeased. |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 439 | |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 440 | public CaptivePortalProbeResult( |
| 441 | int httpResponseCode, String redirectUrl, String detectUrl) { |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 442 | mHttpResponseCode = httpResponseCode; |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 443 | this.redirectUrl = redirectUrl; |
| 444 | this.detectUrl = detectUrl; |
| 445 | } |
| 446 | |
| 447 | public CaptivePortalProbeResult(int httpResponseCode) { |
| 448 | this(httpResponseCode, null, null); |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 449 | } |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 450 | |
| 451 | boolean isSuccessful() { return mHttpResponseCode == 204; } |
| 452 | boolean isPortal() { |
| 453 | return !isSuccessful() && mHttpResponseCode >= 200 && mHttpResponseCode <= 399; |
| 454 | } |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 455 | } |
| 456 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 457 | // Being in the EvaluatingState State indicates the Network is being evaluated for internet |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 458 | // connectivity, or that the user has indicated that this network is unwanted. |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 459 | private class EvaluatingState extends State { |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 460 | private int mReevaluateDelayMs; |
| 461 | private int mAttempts; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 462 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 463 | @Override |
| 464 | public void enter() { |
Erik Kline | a488c23 | 2016-04-15 15:49:42 +0900 | [diff] [blame] | 465 | // If we have already started to track time spent in EvaluatingState |
| 466 | // don't reset the timer due simply to, say, commands or events that |
| 467 | // cause us to exit and re-enter EvaluatingState. |
| 468 | if (!mEvaluationTimer.isStarted()) { |
| 469 | mEvaluationTimer.start(); |
| 470 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 471 | sendMessage(CMD_REEVALUATE, ++mReevaluateToken, 0); |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 472 | if (mUidResponsibleForReeval != INVALID_UID) { |
| 473 | TrafficStats.setThreadStatsUid(mUidResponsibleForReeval); |
| 474 | mUidResponsibleForReeval = INVALID_UID; |
| 475 | } |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 476 | mReevaluateDelayMs = INITIAL_REEVALUATE_DELAY_MS; |
| 477 | mAttempts = 0; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 478 | } |
| 479 | |
| 480 | @Override |
| 481 | public boolean processMessage(Message message) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 482 | switch (message.what) { |
| 483 | case CMD_REEVALUATE: |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 484 | if (message.arg1 != mReevaluateToken || mUserDoesNotWant) |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 485 | return HANDLED; |
Paul Jensen | 2c311d6 | 2014-11-17 12:34:51 -0500 | [diff] [blame] | 486 | // Don't bother validating networks that don't satisify the default request. |
| 487 | // This includes: |
| 488 | // - VPNs which can be considered explicitly desired by the user and the |
| 489 | // user's desire trumps whether the network validates. |
| 490 | // - Networks that don't provide internet access. It's unclear how to |
| 491 | // validate such networks. |
| 492 | // - Untrusted networks. It's unsafe to prompt the user to sign-in to |
| 493 | // such networks and the user didn't express interest in connecting to |
| 494 | // such networks (an app did) so the user may be unhappily surprised when |
| 495 | // asked to sign-in to a network they didn't want to connect to in the |
| 496 | // first place. Validation could be done to adjust the network scores |
| 497 | // however these networks are app-requested and may not be intended for |
| 498 | // general usage, in which case general validation may not be an accurate |
| 499 | // measure of the network's quality. Only the app knows how to evaluate |
| 500 | // the network so don't bother validating here. Furthermore sending HTTP |
| 501 | // packets over the network may be undesirable, for example an extremely |
| 502 | // expensive metered network, or unwanted leaking of the User Agent string. |
| 503 | if (!mDefaultRequest.networkCapabilities.satisfiedByNetworkCapabilities( |
| 504 | mNetworkAgentInfo.networkCapabilities)) { |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 505 | validationLog("Network would not satisfy default request, not validating"); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 506 | transitionTo(mValidatedState); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 507 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 508 | } |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 509 | mAttempts++; |
Lorenzo Colitti | 351bfad | 2015-01-22 22:36:50 +0900 | [diff] [blame] | 510 | // Note: This call to isCaptivePortal() could take up to a minute. Resolving the |
| 511 | // server's IP addresses could hit the DNS timeout, and attempting connections |
| 512 | // to each of the server's several IP addresses (currently one IPv4 and one |
| 513 | // IPv6) could each take SOCKET_TIMEOUT_MS. During this time this StateMachine |
| 514 | // will be unresponsive. isCaptivePortal() could be executed on another Thread |
| 515 | // if this is found to cause problems. |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 516 | CaptivePortalProbeResult probeResult = isCaptivePortal(); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 517 | if (probeResult.isSuccessful()) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 518 | transitionTo(mValidatedState); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 519 | } else if (probeResult.isPortal()) { |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 520 | mConnectivityServiceHandler.sendMessage(obtainMessage(EVENT_NETWORK_TESTED, |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 521 | NETWORK_TEST_RESULT_INVALID, mNetId, probeResult.redirectUrl)); |
| 522 | mLastPortalProbeResult = probeResult; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 523 | transitionTo(mCaptivePortalState); |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 524 | } else { |
Paul Jensen | d9be23f | 2015-05-19 14:51:47 -0400 | [diff] [blame] | 525 | final Message msg = obtainMessage(CMD_REEVALUATE, ++mReevaluateToken, 0); |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 526 | sendMessageDelayed(msg, mReevaluateDelayMs); |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 527 | logNetworkEvent(NetworkEvent.NETWORK_VALIDATION_FAILED); |
Paul Jensen | d9be23f | 2015-05-19 14:51:47 -0400 | [diff] [blame] | 528 | mConnectivityServiceHandler.sendMessage(obtainMessage( |
Erik Kline | a488c23 | 2016-04-15 15:49:42 +0900 | [diff] [blame] | 529 | EVENT_NETWORK_TESTED, NETWORK_TEST_RESULT_INVALID, mNetId, |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 530 | probeResult.redirectUrl)); |
Paul Jensen | d9be23f | 2015-05-19 14:51:47 -0400 | [diff] [blame] | 531 | if (mAttempts >= BLAME_FOR_EVALUATION_ATTEMPTS) { |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 532 | // Don't continue to blame UID forever. |
| 533 | TrafficStats.clearThreadStatsUid(); |
| 534 | } |
| 535 | mReevaluateDelayMs *= 2; |
| 536 | if (mReevaluateDelayMs > MAX_REEVALUATE_DELAY_MS) { |
| 537 | mReevaluateDelayMs = MAX_REEVALUATE_DELAY_MS; |
| 538 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 539 | } |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 540 | return HANDLED; |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 541 | case CMD_FORCE_REEVALUATION: |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 542 | // Before IGNORE_REEVALUATE_ATTEMPTS attempts are made, |
| 543 | // ignore any re-evaluation requests. After, restart the |
| 544 | // evaluation process via EvaluatingState#enter. |
Erik Kline | a488c23 | 2016-04-15 15:49:42 +0900 | [diff] [blame] | 545 | return (mAttempts < IGNORE_REEVALUATE_ATTEMPTS) ? HANDLED : NOT_HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 546 | default: |
| 547 | return NOT_HANDLED; |
| 548 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 549 | } |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 550 | |
| 551 | @Override |
| 552 | public void exit() { |
| 553 | TrafficStats.clearThreadStatsUid(); |
| 554 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 555 | } |
| 556 | |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 557 | // BroadcastReceiver that waits for a particular Intent and then posts a message. |
| 558 | private class CustomIntentReceiver extends BroadcastReceiver { |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 559 | private final int mToken; |
| 560 | private final int mWhat; |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 561 | private final String mAction; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 562 | CustomIntentReceiver(String action, int token, int what) { |
| 563 | mToken = token; |
| 564 | mWhat = what; |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 565 | mAction = action + "_" + mNetworkAgentInfo.network.netId + "_" + token; |
| 566 | mContext.registerReceiver(this, new IntentFilter(mAction)); |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 567 | } |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 568 | public PendingIntent getPendingIntent() { |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 569 | final Intent intent = new Intent(mAction); |
| 570 | intent.setPackage(mContext.getPackageName()); |
| 571 | return PendingIntent.getBroadcast(mContext, 0, intent, 0); |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 572 | } |
| 573 | @Override |
| 574 | public void onReceive(Context context, Intent intent) { |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 575 | if (intent.getAction().equals(mAction)) sendMessage(obtainMessage(mWhat, mToken)); |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 576 | } |
| 577 | } |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 578 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 579 | // Being in the CaptivePortalState State indicates a captive portal was detected and the user |
| 580 | // has been shown a notification to sign-in. |
| 581 | private class CaptivePortalState extends State { |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 582 | private static final String ACTION_LAUNCH_CAPTIVE_PORTAL_APP = |
| 583 | "android.net.netmon.launchCaptivePortalApp"; |
| 584 | |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 585 | @Override |
| 586 | public void enter() { |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 587 | maybeLogEvaluationResult(NetworkEvent.NETWORK_CAPTIVE_PORTAL_FOUND); |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 588 | // Don't annoy user with sign-in notifications. |
Paul Jensen | 700f236 | 2015-05-05 14:56:10 -0400 | [diff] [blame] | 589 | if (mDontDisplaySigninNotification) return; |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 590 | // Create a CustomIntentReceiver that sends us a |
| 591 | // CMD_LAUNCH_CAPTIVE_PORTAL_APP message when the user |
| 592 | // touches the notification. |
| 593 | if (mLaunchCaptivePortalAppBroadcastReceiver == null) { |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 594 | // Wait for result. |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 595 | mLaunchCaptivePortalAppBroadcastReceiver = new CustomIntentReceiver( |
| 596 | ACTION_LAUNCH_CAPTIVE_PORTAL_APP, new Random().nextInt(), |
| 597 | CMD_LAUNCH_CAPTIVE_PORTAL_APP); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 598 | } |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 599 | // Display the sign in notification. |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 600 | Message message = obtainMessage(EVENT_PROVISIONING_NOTIFICATION, 1, |
| 601 | mNetworkAgentInfo.network.netId, |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 602 | mLaunchCaptivePortalAppBroadcastReceiver.getPendingIntent()); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 603 | mConnectivityServiceHandler.sendMessage(message); |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 604 | // Retest for captive portal occasionally. |
| 605 | sendMessageDelayed(CMD_CAPTIVE_PORTAL_RECHECK, 0 /* no UID */, |
| 606 | CAPTIVE_PORTAL_REEVALUATE_DELAY_MS); |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | @Override |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 610 | public void exit() { |
fionaxu | 1bf6ec2 | 2016-05-23 16:33:16 -0700 | [diff] [blame] | 611 | removeMessages(CMD_CAPTIVE_PORTAL_RECHECK); |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 612 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 613 | } |
| 614 | |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 615 | private static String getCaptivePortalServerHttpsUrl(Context context) { |
| 616 | return getSetting(context, Settings.Global.CAPTIVE_PORTAL_HTTPS_URL, DEFAULT_HTTPS_URL); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 617 | } |
| 618 | |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 619 | public static String getCaptivePortalServerHttpUrl(Context context) { |
| 620 | return getSetting(context, Settings.Global.CAPTIVE_PORTAL_HTTP_URL, DEFAULT_HTTP_URL); |
| 621 | } |
| 622 | |
| 623 | private static String getCaptivePortalFallbackUrl(Context context) { |
| 624 | return getSetting(context, |
| 625 | Settings.Global.CAPTIVE_PORTAL_FALLBACK_URL, DEFAULT_FALLBACK_URL); |
| 626 | } |
| 627 | |
| 628 | private static String getCaptivePortalUserAgent(Context context) { |
| 629 | return getSetting(context, Settings.Global.CAPTIVE_PORTAL_USER_AGENT, DEFAULT_USER_AGENT); |
| 630 | } |
| 631 | |
| 632 | private static String getSetting(Context context, String symbol, String defaultValue) { |
| 633 | final String value = Settings.Global.getString(context.getContentResolver(), symbol); |
| 634 | return value != null ? value : defaultValue; |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 635 | } |
| 636 | |
| 637 | @VisibleForTesting |
| 638 | protected CaptivePortalProbeResult isCaptivePortal() { |
Calvin On | 4bc78eb | 2016-10-11 15:10:46 -0700 | [diff] [blame] | 639 | if (!mIsCaptivePortalCheckEnabled) { |
| 640 | validationLog("Validation disabled."); |
| 641 | return new CaptivePortalProbeResult(204); |
| 642 | } |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 643 | |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 644 | URL pacUrl = null, httpsUrl = null, httpUrl = null, fallbackUrl = null; |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 645 | |
| 646 | // On networks with a PAC instead of fetching a URL that should result in a 204 |
| 647 | // response, we instead simply fetch the PAC script. This is done for a few reasons: |
| 648 | // 1. At present our PAC code does not yet handle multiple PACs on multiple networks |
| 649 | // until something like https://android-review.googlesource.com/#/c/115180/ lands. |
| 650 | // Network.openConnection() will ignore network-specific PACs and instead fetch |
| 651 | // using NO_PROXY. If a PAC is in place, the only fetch we know will succeed with |
| 652 | // NO_PROXY is the fetch of the PAC itself. |
| 653 | // 2. To proxy the generate_204 fetch through a PAC would require a number of things |
| 654 | // happen before the fetch can commence, namely: |
| 655 | // a) the PAC script be fetched |
| 656 | // b) a PAC script resolver service be fired up and resolve the captive portal |
| 657 | // server. |
| 658 | // Network validation could be delayed until these prerequisities are satisifed or |
| 659 | // could simply be left to race them. Neither is an optimal solution. |
| 660 | // 3. PAC scripts are sometimes used to block or restrict Internet access and may in |
| 661 | // fact block fetching of the generate_204 URL which would lead to false negative |
| 662 | // results for network validation. |
| 663 | final ProxyInfo proxyInfo = mNetworkAgentInfo.linkProperties.getHttpProxy(); |
| 664 | if (proxyInfo != null && !Uri.EMPTY.equals(proxyInfo.getPacFileUrl())) { |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 665 | pacUrl = makeURL(proxyInfo.getPacFileUrl().toString()); |
| 666 | if (pacUrl == null) { |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 667 | return CaptivePortalProbeResult.FAILED; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | if (pacUrl == null) { |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 672 | httpsUrl = makeURL(getCaptivePortalServerHttpsUrl(mContext)); |
| 673 | httpUrl = makeURL(getCaptivePortalServerHttpUrl(mContext)); |
| 674 | fallbackUrl = makeURL(getCaptivePortalFallbackUrl(mContext)); |
| 675 | if (httpUrl == null || httpsUrl == null) { |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 676 | return CaptivePortalProbeResult.FAILED; |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | long startTime = SystemClock.elapsedRealtime(); |
| 681 | |
| 682 | // Pre-resolve the captive portal server host so we can log it. |
| 683 | // Only do this if HttpURLConnection is about to, to avoid any potentially |
| 684 | // unnecessary resolution. |
| 685 | String hostToResolve = null; |
| 686 | if (pacUrl != null) { |
| 687 | hostToResolve = pacUrl.getHost(); |
| 688 | } else if (proxyInfo != null) { |
| 689 | hostToResolve = proxyInfo.getHost(); |
| 690 | } else { |
| 691 | hostToResolve = httpUrl.getHost(); |
| 692 | } |
| 693 | |
| 694 | if (!TextUtils.isEmpty(hostToResolve)) { |
| 695 | String probeName = ValidationProbeEvent.getProbeName(ValidationProbeEvent.PROBE_DNS); |
| 696 | final Stopwatch dnsTimer = new Stopwatch().start(); |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 697 | int dnsResult; |
| 698 | long dnsLatency; |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 699 | try { |
| 700 | InetAddress[] addresses = mNetworkAgentInfo.network.getAllByName(hostToResolve); |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 701 | dnsResult = ValidationProbeEvent.DNS_SUCCESS; |
| 702 | dnsLatency = dnsTimer.stop(); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 703 | final StringBuffer connectInfo = new StringBuffer(", " + hostToResolve + "="); |
| 704 | for (InetAddress address : addresses) { |
| 705 | connectInfo.append(address.getHostAddress()); |
| 706 | if (address != addresses[addresses.length-1]) connectInfo.append(","); |
| 707 | } |
| 708 | validationLog(probeName + " OK " + dnsLatency + "ms" + connectInfo); |
| 709 | } catch (UnknownHostException e) { |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 710 | dnsResult = ValidationProbeEvent.DNS_FAILURE; |
| 711 | dnsLatency = dnsTimer.stop(); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 712 | validationLog(probeName + " FAIL " + dnsLatency + "ms, " + hostToResolve); |
| 713 | } |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 714 | logValidationProbe(dnsLatency, ValidationProbeEvent.PROBE_DNS, dnsResult); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 715 | } |
| 716 | |
| 717 | CaptivePortalProbeResult result; |
| 718 | if (pacUrl != null) { |
| 719 | result = sendHttpProbe(pacUrl, ValidationProbeEvent.PROBE_PAC); |
| 720 | } else if (mUseHttps) { |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 721 | result = sendParallelHttpProbes(httpsUrl, httpUrl, fallbackUrl); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 722 | } else { |
| 723 | result = sendHttpProbe(httpUrl, ValidationProbeEvent.PROBE_HTTP); |
| 724 | } |
| 725 | |
| 726 | long endTime = SystemClock.elapsedRealtime(); |
| 727 | |
| 728 | sendNetworkConditionsBroadcast(true /* response received */, |
| 729 | result.isPortal() /* isCaptivePortal */, |
| 730 | startTime, endTime); |
| 731 | |
| 732 | return result; |
Udam Saini | b7c2487 | 2016-01-04 12:16:14 -0800 | [diff] [blame] | 733 | } |
| 734 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 735 | /** |
| 736 | * Do a URL fetch on a known server to see if we get the data we expect. |
| 737 | * Returns HTTP response code. |
| 738 | */ |
Paul Jensen | cf4c2c6 | 2015-07-01 14:16:32 -0400 | [diff] [blame] | 739 | @VisibleForTesting |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 740 | protected CaptivePortalProbeResult sendHttpProbe(URL url, int probeType) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 741 | HttpURLConnection urlConnection = null; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 742 | int httpResponseCode = 599; |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 743 | String redirectUrl = null; |
Erik Kline | a488c23 | 2016-04-15 15:49:42 +0900 | [diff] [blame] | 744 | final Stopwatch probeTimer = new Stopwatch().start(); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 745 | try { |
Lorenzo Colitti | 9f1274b | 2014-08-21 11:45:54 -0700 | [diff] [blame] | 746 | urlConnection = (HttpURLConnection) mNetworkAgentInfo.network.openConnection(url); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 747 | urlConnection.setInstanceFollowRedirects(probeType == ValidationProbeEvent.PROBE_PAC); |
Paul Jensen | e547ff2 | 2014-08-04 09:12:24 -0400 | [diff] [blame] | 748 | urlConnection.setConnectTimeout(SOCKET_TIMEOUT_MS); |
| 749 | urlConnection.setReadTimeout(SOCKET_TIMEOUT_MS); |
| 750 | urlConnection.setUseCaches(false); |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 751 | final String userAgent = getCaptivePortalUserAgent(mContext); |
| 752 | if (userAgent != null) { |
| 753 | urlConnection.setRequestProperty("User-Agent", userAgent); |
| 754 | } |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 755 | |
| 756 | // Time how long it takes to get a response to our request |
| 757 | long requestTimestamp = SystemClock.elapsedRealtime(); |
| 758 | |
Pierre Imai | be12d76 | 2016-03-10 17:00:50 +0900 | [diff] [blame] | 759 | httpResponseCode = urlConnection.getResponseCode(); |
Paul Jensen | 23243731 | 2016-04-06 09:51:26 -0400 | [diff] [blame] | 760 | redirectUrl = urlConnection.getHeaderField("location"); |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 761 | |
| 762 | // Time how long it takes to get a response to our request |
| 763 | long responseTimestamp = SystemClock.elapsedRealtime(); |
| 764 | |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 765 | validationLog(ValidationProbeEvent.getProbeName(probeType) + " " + url + |
| 766 | " time=" + (responseTimestamp - requestTimestamp) + "ms" + |
| 767 | " ret=" + httpResponseCode + |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 768 | " headers=" + urlConnection.getHeaderFields()); |
Paul Jensen | e547ff2 | 2014-08-04 09:12:24 -0400 | [diff] [blame] | 769 | // NOTE: We may want to consider an "HTTP/1.0 204" response to be a captive |
| 770 | // portal. The only example of this seen so far was a captive portal. For |
| 771 | // the time being go with prior behavior of assuming it's not a captive |
| 772 | // portal. If it is considered a captive portal, a different sign-in URL |
| 773 | // is needed (i.e. can't browse a 204). This could be the result of an HTTP |
| 774 | // proxy server. |
| 775 | |
| 776 | // Consider 200 response with "Content-length=0" to not be a captive portal. |
| 777 | // There's no point in considering this a captive portal as the user cannot |
| 778 | // sign-in to an empty page. Probably the result of a broken transparent proxy. |
| 779 | // See http://b/9972012. |
| 780 | if (httpResponseCode == 200 && urlConnection.getContentLength() == 0) { |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 781 | validationLog("Empty 200 response interpreted as 204 response."); |
Paul Jensen | e547ff2 | 2014-08-04 09:12:24 -0400 | [diff] [blame] | 782 | httpResponseCode = 204; |
| 783 | } |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 784 | |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 785 | if (httpResponseCode == 200 && probeType == ValidationProbeEvent.PROBE_PAC) { |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 786 | validationLog("PAC fetch 200 response interpreted as 204 response."); |
Paul Jensen | 8fe1742 | 2015-02-02 11:03:03 -0500 | [diff] [blame] | 787 | httpResponseCode = 204; |
| 788 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 789 | } catch (IOException e) { |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 790 | validationLog("Probably not a portal: exception " + e); |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 791 | if (httpResponseCode == 599) { |
| 792 | // TODO: Ping gateway and DNS server and log results. |
| 793 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 794 | } finally { |
| 795 | if (urlConnection != null) { |
| 796 | urlConnection.disconnect(); |
| 797 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 798 | } |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 799 | logValidationProbe(probeTimer.stop(), probeType, httpResponseCode); |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 800 | return new CaptivePortalProbeResult(httpResponseCode, redirectUrl, url.toString()); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 801 | } |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 802 | |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 803 | private CaptivePortalProbeResult sendParallelHttpProbes( |
| 804 | URL httpsUrl, URL httpUrl, URL fallbackUrl) { |
| 805 | // Number of probes to wait for. If a probe completes with a conclusive answer |
| 806 | // it shortcuts the latch immediately by forcing the count to 0. |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 807 | final CountDownLatch latch = new CountDownLatch(2); |
| 808 | |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 809 | final class ProbeThread extends Thread { |
| 810 | private final boolean mIsHttps; |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 811 | private volatile CaptivePortalProbeResult mResult = CaptivePortalProbeResult.FAILED; |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 812 | |
| 813 | public ProbeThread(boolean isHttps) { |
| 814 | mIsHttps = isHttps; |
| 815 | } |
| 816 | |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 817 | public CaptivePortalProbeResult result() { |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 818 | return mResult; |
| 819 | } |
| 820 | |
| 821 | @Override |
| 822 | public void run() { |
| 823 | if (mIsHttps) { |
| 824 | mResult = sendHttpProbe(httpsUrl, ValidationProbeEvent.PROBE_HTTPS); |
| 825 | } else { |
| 826 | mResult = sendHttpProbe(httpUrl, ValidationProbeEvent.PROBE_HTTP); |
| 827 | } |
| 828 | if ((mIsHttps && mResult.isSuccessful()) || (!mIsHttps && mResult.isPortal())) { |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 829 | // Stop waiting immediately if https succeeds or if http finds a portal. |
| 830 | while (latch.getCount() > 0) { |
| 831 | latch.countDown(); |
| 832 | } |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 833 | } |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 834 | // Signal this probe has completed. |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 835 | latch.countDown(); |
| 836 | } |
| 837 | } |
| 838 | |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 839 | final ProbeThread httpsProbe = new ProbeThread(true); |
| 840 | final ProbeThread httpProbe = new ProbeThread(false); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 841 | |
| 842 | try { |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 843 | httpsProbe.start(); |
| 844 | httpProbe.start(); |
| 845 | latch.await(PROBE_TIMEOUT_MS, TimeUnit.MILLISECONDS); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 846 | } catch (InterruptedException e) { |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 847 | validationLog("Error: probes wait interrupted!"); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 848 | return CaptivePortalProbeResult.FAILED; |
| 849 | } |
| 850 | |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 851 | final CaptivePortalProbeResult httpsResult = httpsProbe.result(); |
| 852 | final CaptivePortalProbeResult httpResult = httpProbe.result(); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 853 | |
Hugo Benichi | d953bf8 | 2016-09-27 09:22:35 +0900 | [diff] [blame] | 854 | // Look for a conclusive probe result first. |
| 855 | if (httpResult.isPortal()) { |
| 856 | return httpResult; |
| 857 | } |
| 858 | // httpsResult.isPortal() is not expected, but check it nonetheless. |
| 859 | if (httpsResult.isPortal() || httpsResult.isSuccessful()) { |
| 860 | return httpsResult; |
| 861 | } |
| 862 | // If a fallback url is specified, use a fallback probe to try again portal detection. |
| 863 | if (fallbackUrl != null) { |
| 864 | CaptivePortalProbeResult result = |
| 865 | sendHttpProbe(fallbackUrl, ValidationProbeEvent.PROBE_FALLBACK); |
| 866 | if (result.isPortal()) { |
| 867 | return result; |
| 868 | } |
| 869 | } |
| 870 | // Otherwise wait until https probe completes and use its result. |
| 871 | try { |
| 872 | httpsProbe.join(); |
| 873 | } catch (InterruptedException e) { |
| 874 | validationLog("Error: https probe wait interrupted!"); |
| 875 | return CaptivePortalProbeResult.FAILED; |
| 876 | } |
| 877 | return httpsProbe.result(); |
Lorenzo Colitti | c5be12e | 2016-04-19 21:57:31 +0900 | [diff] [blame] | 878 | } |
| 879 | |
Hugo Benichi | 92eb22fd | 2016-09-27 13:01:41 +0900 | [diff] [blame] | 880 | private URL makeURL(String url) { |
| 881 | if (url != null) { |
| 882 | try { |
| 883 | return new URL(url); |
| 884 | } catch (MalformedURLException e) { |
| 885 | validationLog("Bad URL: " + url); |
| 886 | } |
| 887 | } |
| 888 | return null; |
| 889 | } |
| 890 | |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 891 | /** |
| 892 | * @param responseReceived - whether or not we received a valid HTTP response to our request. |
| 893 | * If false, isCaptivePortal and responseTimestampMs are ignored |
| 894 | * TODO: This should be moved to the transports. The latency could be passed to the transports |
| 895 | * along with the captive portal result. Currently the TYPE_MOBILE broadcasts appear unused so |
| 896 | * perhaps this could just be added to the WiFi transport only. |
| 897 | */ |
| 898 | private void sendNetworkConditionsBroadcast(boolean responseReceived, boolean isCaptivePortal, |
| 899 | long requestTimestampMs, long responseTimestampMs) { |
| 900 | if (Settings.Global.getInt(mContext.getContentResolver(), |
| 901 | Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE, 0) == 0) { |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 902 | return; |
| 903 | } |
| 904 | |
Robert Greenwalt | fb68f8f | 2014-08-13 13:43:32 -0700 | [diff] [blame] | 905 | if (systemReady == false) return; |
| 906 | |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 907 | Intent latencyBroadcast = new Intent(ACTION_NETWORK_CONDITIONS_MEASURED); |
| 908 | switch (mNetworkAgentInfo.networkInfo.getType()) { |
| 909 | case ConnectivityManager.TYPE_WIFI: |
| 910 | WifiInfo currentWifiInfo = mWifiManager.getConnectionInfo(); |
| 911 | if (currentWifiInfo != null) { |
| 912 | // NOTE: getSSID()'s behavior changed in API 17; before that, SSIDs were not |
| 913 | // surrounded by double quotation marks (thus violating the Javadoc), but this |
| 914 | // was changed to match the Javadoc in API 17. Since clients may have started |
| 915 | // sanitizing the output of this method since API 17 was released, we should |
| 916 | // not change it here as it would become impossible to tell whether the SSID is |
| 917 | // simply being surrounded by quotes due to the API, or whether those quotes |
| 918 | // are actually part of the SSID. |
| 919 | latencyBroadcast.putExtra(EXTRA_SSID, currentWifiInfo.getSSID()); |
| 920 | latencyBroadcast.putExtra(EXTRA_BSSID, currentWifiInfo.getBSSID()); |
| 921 | } else { |
Hugo Benichi | a4f17bc | 2016-11-21 13:50:05 +0900 | [diff] [blame^] | 922 | if (VDBG) logw("network info is TYPE_WIFI but no ConnectionInfo found"); |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 923 | return; |
| 924 | } |
| 925 | break; |
| 926 | case ConnectivityManager.TYPE_MOBILE: |
| 927 | latencyBroadcast.putExtra(EXTRA_NETWORK_TYPE, mTelephonyManager.getNetworkType()); |
| 928 | List<CellInfo> info = mTelephonyManager.getAllCellInfo(); |
| 929 | if (info == null) return; |
| 930 | int numRegisteredCellInfo = 0; |
| 931 | for (CellInfo cellInfo : info) { |
| 932 | if (cellInfo.isRegistered()) { |
| 933 | numRegisteredCellInfo++; |
| 934 | if (numRegisteredCellInfo > 1) { |
Hugo Benichi | a4f17bc | 2016-11-21 13:50:05 +0900 | [diff] [blame^] | 935 | if (VDBG) logw("more than one registered CellInfo." + |
| 936 | " Can't tell which is active. Bailing."); |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 937 | return; |
| 938 | } |
| 939 | if (cellInfo instanceof CellInfoCdma) { |
| 940 | CellIdentityCdma cellId = ((CellInfoCdma) cellInfo).getCellIdentity(); |
| 941 | latencyBroadcast.putExtra(EXTRA_CELL_ID, cellId); |
| 942 | } else if (cellInfo instanceof CellInfoGsm) { |
| 943 | CellIdentityGsm cellId = ((CellInfoGsm) cellInfo).getCellIdentity(); |
| 944 | latencyBroadcast.putExtra(EXTRA_CELL_ID, cellId); |
| 945 | } else if (cellInfo instanceof CellInfoLte) { |
| 946 | CellIdentityLte cellId = ((CellInfoLte) cellInfo).getCellIdentity(); |
| 947 | latencyBroadcast.putExtra(EXTRA_CELL_ID, cellId); |
| 948 | } else if (cellInfo instanceof CellInfoWcdma) { |
| 949 | CellIdentityWcdma cellId = ((CellInfoWcdma) cellInfo).getCellIdentity(); |
| 950 | latencyBroadcast.putExtra(EXTRA_CELL_ID, cellId); |
| 951 | } else { |
Hugo Benichi | a4f17bc | 2016-11-21 13:50:05 +0900 | [diff] [blame^] | 952 | if (VDBG) logw("Registered cellinfo is unrecognized"); |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 953 | return; |
| 954 | } |
| 955 | } |
| 956 | } |
| 957 | break; |
| 958 | default: |
| 959 | return; |
| 960 | } |
| 961 | latencyBroadcast.putExtra(EXTRA_CONNECTIVITY_TYPE, mNetworkAgentInfo.networkInfo.getType()); |
| 962 | latencyBroadcast.putExtra(EXTRA_RESPONSE_RECEIVED, responseReceived); |
| 963 | latencyBroadcast.putExtra(EXTRA_REQUEST_TIMESTAMP_MS, requestTimestampMs); |
| 964 | |
| 965 | if (responseReceived) { |
| 966 | latencyBroadcast.putExtra(EXTRA_IS_CAPTIVE_PORTAL, isCaptivePortal); |
| 967 | latencyBroadcast.putExtra(EXTRA_RESPONSE_TIMESTAMP_MS, responseTimestampMs); |
| 968 | } |
Paul Jensen | 5529858 | 2014-08-20 11:01:41 -0400 | [diff] [blame] | 969 | mContext.sendBroadcastAsUser(latencyBroadcast, UserHandle.CURRENT, |
| 970 | PERMISSION_ACCESS_NETWORK_CONDITIONS); |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 971 | } |
Paul Jensen | d7b6ca9 | 2015-05-13 14:05:12 -0400 | [diff] [blame] | 972 | |
Hugo Benichi | cfddd68 | 2016-05-31 16:28:06 +0900 | [diff] [blame] | 973 | private void logNetworkEvent(int evtype) { |
| 974 | mMetricsLog.log(new NetworkEvent(mNetId, evtype)); |
| 975 | } |
| 976 | |
| 977 | private void maybeLogEvaluationResult(int evtype) { |
| 978 | if (mEvaluationTimer.isRunning()) { |
| 979 | mMetricsLog.log(new NetworkEvent(mNetId, evtype, mEvaluationTimer.stop())); |
| 980 | mEvaluationTimer.reset(); |
| 981 | } |
| 982 | } |
| 983 | |
| 984 | private void logValidationProbe(long durationMs, int probeType, int probeResult) { |
| 985 | mMetricsLog.log(new ValidationProbeEvent(mNetId, durationMs, probeType, probeResult)); |
| 986 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 987 | } |