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 | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 19 | import android.app.AlarmManager; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 20 | import android.app.PendingIntent; |
| 21 | import android.content.BroadcastReceiver; |
| 22 | import android.content.ComponentName; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 23 | import android.content.Context; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 24 | import android.content.Intent; |
| 25 | import android.content.IntentFilter; |
| 26 | import android.net.ConnectivityManager; |
Paul Jensen | 2c311d6 | 2014-11-17 12:34:51 -0500 | [diff] [blame] | 27 | import android.net.NetworkRequest; |
Paul Jensen | 8fe1742 | 2015-02-02 11:03:03 -0500 | [diff] [blame] | 28 | import android.net.ProxyInfo; |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 29 | import android.net.TrafficStats; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 30 | import android.net.Uri; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 31 | import android.net.wifi.WifiInfo; |
| 32 | import android.net.wifi.WifiManager; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 33 | import android.os.Handler; |
| 34 | import android.os.Message; |
Paul Jensen | d7b6ca9 | 2015-05-13 14:05:12 -0400 | [diff] [blame] | 35 | import android.os.Process; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 36 | import android.os.SystemClock; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 37 | import android.os.SystemProperties; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 38 | import android.os.UserHandle; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 39 | import android.provider.Settings; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 40 | import android.telephony.CellIdentityCdma; |
| 41 | import android.telephony.CellIdentityGsm; |
| 42 | import android.telephony.CellIdentityLte; |
| 43 | import android.telephony.CellIdentityWcdma; |
| 44 | import android.telephony.CellInfo; |
| 45 | import android.telephony.CellInfoCdma; |
| 46 | import android.telephony.CellInfoGsm; |
| 47 | import android.telephony.CellInfoLte; |
| 48 | import android.telephony.CellInfoWcdma; |
| 49 | import android.telephony.TelephonyManager; |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 50 | import android.util.LocalLog; |
| 51 | import android.util.LocalLog.ReadOnlyLocalLog; |
Paul Jensen | 532b6143 | 2014-11-10 09:50:02 -0500 | [diff] [blame] | 52 | import android.util.Log; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 53 | |
Paul Jensen | d7b6ca9 | 2015-05-13 14:05:12 -0400 | [diff] [blame] | 54 | import com.android.internal.annotations.VisibleForTesting; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 55 | import com.android.internal.util.Protocol; |
| 56 | import com.android.internal.util.State; |
| 57 | import com.android.internal.util.StateMachine; |
| 58 | import com.android.server.connectivity.NetworkAgentInfo; |
| 59 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 60 | import java.io.IOException; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 61 | import java.net.HttpURLConnection; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 62 | import java.net.URL; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 63 | import java.util.List; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 64 | import java.util.Random; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 65 | |
| 66 | /** |
| 67 | * {@hide} |
| 68 | */ |
| 69 | public class NetworkMonitor extends StateMachine { |
| 70 | private static final boolean DBG = true; |
| 71 | private static final String TAG = "NetworkMonitor"; |
Lorenzo Colitti | cd29cb6 | 2015-01-14 00:16:03 +0900 | [diff] [blame] | 72 | private static final String DEFAULT_SERVER = "connectivitycheck.android.com"; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 73 | private static final int SOCKET_TIMEOUT_MS = 10000; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 74 | public static final String ACTION_NETWORK_CONDITIONS_MEASURED = |
| 75 | "android.net.conn.NETWORK_CONDITIONS_MEASURED"; |
| 76 | public static final String EXTRA_CONNECTIVITY_TYPE = "extra_connectivity_type"; |
| 77 | public static final String EXTRA_NETWORK_TYPE = "extra_network_type"; |
| 78 | public static final String EXTRA_RESPONSE_RECEIVED = "extra_response_received"; |
| 79 | public static final String EXTRA_IS_CAPTIVE_PORTAL = "extra_is_captive_portal"; |
| 80 | public static final String EXTRA_CELL_ID = "extra_cellid"; |
| 81 | public static final String EXTRA_SSID = "extra_ssid"; |
| 82 | public static final String EXTRA_BSSID = "extra_bssid"; |
| 83 | /** real time since boot */ |
| 84 | public static final String EXTRA_REQUEST_TIMESTAMP_MS = "extra_request_timestamp_ms"; |
| 85 | public static final String EXTRA_RESPONSE_TIMESTAMP_MS = "extra_response_timestamp_ms"; |
| 86 | |
| 87 | private static final String PERMISSION_ACCESS_NETWORK_CONDITIONS = |
| 88 | "android.permission.ACCESS_NETWORK_CONDITIONS"; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 89 | |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 90 | // After a network has been tested this result can be sent with EVENT_NETWORK_TESTED. |
| 91 | // The network should be used as a default internet connection. It was found to be: |
| 92 | // 1. a functioning network providing internet access, or |
| 93 | // 2. a captive portal and the user decided to use it as is. |
| 94 | public static final int NETWORK_TEST_RESULT_VALID = 0; |
| 95 | // After a network has been tested this result can be sent with EVENT_NETWORK_TESTED. |
| 96 | // The network should not be used as a default internet connection. It was found to be: |
| 97 | // 1. a captive portal and the user is prompted to sign-in, or |
| 98 | // 2. a captive portal and the user did not want to use it, or |
| 99 | // 3. a broken network (e.g. DNS failed, connect failed, HTTP request failed). |
| 100 | public static final int NETWORK_TEST_RESULT_INVALID = 1; |
| 101 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 102 | private static final int BASE = Protocol.BASE_NETWORK_MONITOR; |
| 103 | |
| 104 | /** |
| 105 | * Inform NetworkMonitor that their network is connected. |
| 106 | * Initiates Network Validation. |
| 107 | */ |
| 108 | public static final int CMD_NETWORK_CONNECTED = BASE + 1; |
| 109 | |
| 110 | /** |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 111 | * Inform ConnectivityService that the network has been tested. |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 112 | * obj = NetworkAgentInfo |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 113 | * arg1 = One of the NETWORK_TESTED_RESULT_* constants. |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 114 | */ |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 115 | public static final int EVENT_NETWORK_TESTED = BASE + 2; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 116 | |
| 117 | /** |
| 118 | * Inform NetworkMonitor to linger a network. The Monitor should |
| 119 | * start a timer and/or start watching for zero live connections while |
| 120 | * moving towards LINGER_COMPLETE. After the Linger period expires |
| 121 | * (or other events mark the end of the linger state) the LINGER_COMPLETE |
| 122 | * event should be sent and the network will be shut down. If a |
| 123 | * CMD_NETWORK_CONNECTED happens before the LINGER completes |
| 124 | * it indicates further desire to keep the network alive and so |
| 125 | * the LINGER is aborted. |
| 126 | */ |
| 127 | public static final int CMD_NETWORK_LINGER = BASE + 3; |
| 128 | |
| 129 | /** |
| 130 | * Message to self indicating linger delay has expired. |
| 131 | * arg1 = Token to ignore old messages. |
| 132 | */ |
| 133 | private static final int CMD_LINGER_EXPIRED = BASE + 4; |
| 134 | |
| 135 | /** |
| 136 | * Inform ConnectivityService that the network LINGER period has |
| 137 | * expired. |
| 138 | * obj = NetworkAgentInfo |
| 139 | */ |
| 140 | public static final int EVENT_NETWORK_LINGER_COMPLETE = BASE + 5; |
| 141 | |
| 142 | /** |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 143 | * Message to self indicating it's time to evaluate a network's connectivity. |
| 144 | * arg1 = Token to ignore old messages. |
| 145 | */ |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 146 | private static final int CMD_REEVALUATE = BASE + 6; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 147 | |
| 148 | /** |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 149 | * Inform NetworkMonitor that the network has disconnected. |
| 150 | */ |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 151 | public static final int CMD_NETWORK_DISCONNECTED = BASE + 7; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 152 | |
| 153 | /** |
| 154 | * Force evaluation even if it has succeeded in the past. |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 155 | * arg1 = UID responsible for requesting this reeval. Will be billed for data. |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 156 | */ |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 157 | public static final int CMD_FORCE_REEVALUATION = BASE + 8; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 158 | |
| 159 | /** |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 160 | * Message to self indicating captive portal app finished. |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 161 | * arg1 = one of: CAPTIVE_PORTAL_APP_RETURN_DISMISSED, |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 162 | * CAPTIVE_PORTAL_APP_RETURN_UNWANTED, |
| 163 | * CAPTIVE_PORTAL_APP_RETURN_WANTED_AS_IS |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 164 | * obj = mCaptivePortalLoggedInResponseToken as String |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 165 | */ |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 166 | public static final int CMD_CAPTIVE_PORTAL_APP_FINISHED = BASE + 9; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 167 | |
| 168 | /** |
| 169 | * Request ConnectivityService display provisioning notification. |
| 170 | * arg1 = Whether to make the notification visible. |
Paul Jensen | fdc4e4a | 2014-07-15 12:07:36 -0400 | [diff] [blame] | 171 | * arg2 = NetID. |
| 172 | * 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] | 173 | */ |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 174 | public static final int EVENT_PROVISIONING_NOTIFICATION = BASE + 10; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 175 | |
| 176 | /** |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 177 | * Message to self indicating sign-in app should be launched. |
| 178 | * Sent by mLaunchCaptivePortalAppBroadcastReceiver when the |
| 179 | * user touches the sign in notification. |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 180 | */ |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 181 | private static final int CMD_LAUNCH_CAPTIVE_PORTAL_APP = BASE + 11; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 182 | |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 183 | /** |
| 184 | * Retest network to see if captive portal is still in place. |
| 185 | * arg1 = UID responsible for requesting this reeval. Will be billed for data. |
| 186 | * 0 indicates self-initiated, so nobody to blame. |
| 187 | */ |
| 188 | private static final int CMD_CAPTIVE_PORTAL_RECHECK = BASE + 12; |
| 189 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 190 | private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; |
Paul Jensen | d7b6ca9 | 2015-05-13 14:05:12 -0400 | [diff] [blame] | 191 | // Default to 30s linger time-out. Modifyable only for testing. |
| 192 | private static int DEFAULT_LINGER_DELAY_MS = 30000; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 193 | private final int mLingerDelayMs; |
| 194 | private int mLingerToken = 0; |
| 195 | |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 196 | // Start mReevaluateDelayMs at this value and double. |
| 197 | private static final int INITIAL_REEVALUATE_DELAY_MS = 1000; |
| 198 | private static final int MAX_REEVALUATE_DELAY_MS = 10*60*1000; |
| 199 | // Before network has been evaluated this many times, ignore repeated reevaluate requests. |
| 200 | private static final int IGNORE_REEVALUATE_ATTEMPTS = 5; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 201 | private int mReevaluateToken = 0; |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 202 | private static final int INVALID_UID = -1; |
| 203 | private int mUidResponsibleForReeval = INVALID_UID; |
Paul Jensen | d9be23f | 2015-05-19 14:51:47 -0400 | [diff] [blame] | 204 | // Stop blaming UID that requested re-evaluation after this many attempts. |
| 205 | private static final int BLAME_FOR_EVALUATION_ATTEMPTS = 5; |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 206 | // Delay between reevaluations once a captive portal has been found. |
| 207 | private static final int CAPTIVE_PORTAL_REEVALUATE_DELAY_MS = 10*60*1000; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 208 | |
| 209 | private final Context mContext; |
| 210 | private final Handler mConnectivityServiceHandler; |
| 211 | private final NetworkAgentInfo mNetworkAgentInfo; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 212 | private final TelephonyManager mTelephonyManager; |
| 213 | private final WifiManager mWifiManager; |
Paul Jensen | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 214 | private final AlarmManager mAlarmManager; |
Paul Jensen | 2c311d6 | 2014-11-17 12:34:51 -0500 | [diff] [blame] | 215 | private final NetworkRequest mDefaultRequest; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 216 | |
| 217 | private String mServer; |
| 218 | private boolean mIsCaptivePortalCheckEnabled = false; |
| 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(); |
| 232 | private final State mLingeringState = new LingeringState(); |
| 233 | |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 234 | private CustomIntentReceiver mLaunchCaptivePortalAppBroadcastReceiver = null; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 235 | private String mCaptivePortalLoggedInResponseToken = null; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 236 | |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 237 | private final LocalLog validationLogs = new LocalLog(20); // 20 lines |
| 238 | |
Paul Jensen | 2c311d6 | 2014-11-17 12:34:51 -0500 | [diff] [blame] | 239 | public NetworkMonitor(Context context, Handler handler, NetworkAgentInfo networkAgentInfo, |
| 240 | NetworkRequest defaultRequest) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 241 | // Add suffix indicating which NetworkMonitor we're talking about. |
| 242 | super(TAG + networkAgentInfo.name()); |
| 243 | |
| 244 | mContext = context; |
| 245 | mConnectivityServiceHandler = handler; |
| 246 | mNetworkAgentInfo = networkAgentInfo; |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 247 | mTelephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); |
| 248 | mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); |
Paul Jensen | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 249 | mAlarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); |
Paul Jensen | 2c311d6 | 2014-11-17 12:34:51 -0500 | [diff] [blame] | 250 | mDefaultRequest = defaultRequest; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 251 | |
| 252 | addState(mDefaultState); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 253 | addState(mValidatedState, mDefaultState); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 254 | addState(mMaybeNotifyState, mDefaultState); |
| 255 | addState(mEvaluatingState, mMaybeNotifyState); |
| 256 | addState(mCaptivePortalState, mMaybeNotifyState); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 257 | addState(mLingeringState, mDefaultState); |
Robert Greenwalt | 49f63fb | 2014-09-13 12:04:12 -0700 | [diff] [blame] | 258 | setInitialState(mDefaultState); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 259 | |
| 260 | mServer = Settings.Global.getString(mContext.getContentResolver(), |
| 261 | Settings.Global.CAPTIVE_PORTAL_SERVER); |
| 262 | if (mServer == null) mServer = DEFAULT_SERVER; |
| 263 | |
| 264 | mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 265 | |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 266 | mIsCaptivePortalCheckEnabled = Settings.Global.getInt(mContext.getContentResolver(), |
| 267 | Settings.Global.CAPTIVE_PORTAL_DETECTION_ENABLED, 1) == 1; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 268 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 269 | mCaptivePortalLoggedInResponseToken = String.valueOf(new Random().nextLong()); |
| 270 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 271 | start(); |
| 272 | } |
| 273 | |
Paul Jensen | 532b6143 | 2014-11-10 09:50:02 -0500 | [diff] [blame] | 274 | @Override |
| 275 | protected void log(String s) { |
Paul Jensen | 22e547a | 2015-06-25 09:17:53 -0400 | [diff] [blame^] | 276 | if (DBG) Log.d(TAG + "/" + mNetworkAgentInfo.name(), s); |
Paul Jensen | 532b6143 | 2014-11-10 09:50:02 -0500 | [diff] [blame] | 277 | } |
| 278 | |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 279 | private void validationLog(String s) { |
| 280 | if (DBG) log(s); |
| 281 | validationLogs.log(s); |
| 282 | } |
| 283 | |
| 284 | public ReadOnlyLocalLog getValidationLogs() { |
| 285 | return validationLogs.readOnlyLocalLog(); |
| 286 | } |
| 287 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 288 | // DefaultState is the parent of all States. It exists only to handle CMD_* messages but |
| 289 | // does not entail any real state (hence no enter() or exit() routines). |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 290 | private class DefaultState extends State { |
| 291 | @Override |
| 292 | public boolean processMessage(Message message) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 293 | switch (message.what) { |
| 294 | case CMD_NETWORK_LINGER: |
Paul Jensen | 22e547a | 2015-06-25 09:17:53 -0400 | [diff] [blame^] | 295 | log("Lingering"); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 296 | transitionTo(mLingeringState); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 297 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 298 | case CMD_NETWORK_CONNECTED: |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 299 | transitionTo(mEvaluatingState); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 300 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 301 | case CMD_NETWORK_DISCONNECTED: |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 302 | if (mLaunchCaptivePortalAppBroadcastReceiver != null) { |
| 303 | mContext.unregisterReceiver(mLaunchCaptivePortalAppBroadcastReceiver); |
| 304 | mLaunchCaptivePortalAppBroadcastReceiver = null; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 305 | } |
Robert Greenwalt | 1fd9aee | 2014-07-17 16:11:38 -0700 | [diff] [blame] | 306 | quit(); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 307 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 308 | case CMD_FORCE_REEVALUATION: |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 309 | case CMD_CAPTIVE_PORTAL_RECHECK: |
Paul Jensen | 22e547a | 2015-06-25 09:17:53 -0400 | [diff] [blame^] | 310 | log("Forcing reevaluation for UID " + message.arg1); |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 311 | mUidResponsibleForReeval = message.arg1; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 312 | transitionTo(mEvaluatingState); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 313 | return HANDLED; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 314 | case CMD_CAPTIVE_PORTAL_APP_FINISHED: |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 315 | if (!mCaptivePortalLoggedInResponseToken.equals((String)message.obj)) |
| 316 | return HANDLED; |
Paul Jensen | 22e547a | 2015-06-25 09:17:53 -0400 | [diff] [blame^] | 317 | log("CaptivePortal App responded with " + message.arg1); |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 318 | // Previous token was sent out, come up with a new one. |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 319 | mCaptivePortalLoggedInResponseToken = String.valueOf(new Random().nextLong()); |
| 320 | switch (message.arg1) { |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 321 | case ConnectivityManager.CAPTIVE_PORTAL_APP_RETURN_DISMISSED: |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 322 | sendMessage(CMD_FORCE_REEVALUATION, 0 /* no UID */, 0); |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 323 | break; |
| 324 | case ConnectivityManager.CAPTIVE_PORTAL_APP_RETURN_WANTED_AS_IS: |
Paul Jensen | 700f236 | 2015-05-05 14:56:10 -0400 | [diff] [blame] | 325 | mDontDisplaySigninNotification = true; |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 326 | // TODO: Distinguish this from a network that actually validates. |
| 327 | // 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] | 328 | transitionTo(mValidatedState); |
| 329 | break; |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 330 | case ConnectivityManager.CAPTIVE_PORTAL_APP_RETURN_UNWANTED: |
Paul Jensen | 700f236 | 2015-05-05 14:56:10 -0400 | [diff] [blame] | 331 | mDontDisplaySigninNotification = true; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 332 | mUserDoesNotWant = true; |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 333 | mConnectivityServiceHandler.sendMessage(obtainMessage( |
| 334 | EVENT_NETWORK_TESTED, NETWORK_TEST_RESULT_INVALID, 0, |
| 335 | mNetworkAgentInfo)); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 336 | // TODO: Should teardown network. |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 337 | mUidResponsibleForReeval = 0; |
| 338 | transitionTo(mEvaluatingState); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 339 | break; |
| 340 | } |
| 341 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 342 | default: |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 343 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 344 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 345 | } |
| 346 | } |
| 347 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 348 | // Being in the ValidatedState State indicates a Network is: |
| 349 | // - Successfully validated, or |
| 350 | // - Wanted "as is" by the user, or |
| 351 | // - Does not satsify the default NetworkRequest and so validation has been skipped. |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 352 | private class ValidatedState extends State { |
| 353 | @Override |
| 354 | public void enter() { |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 355 | mConnectivityServiceHandler.sendMessage(obtainMessage(EVENT_NETWORK_TESTED, |
| 356 | NETWORK_TEST_RESULT_VALID, 0, mNetworkAgentInfo)); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | @Override |
| 360 | public boolean processMessage(Message message) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 361 | switch (message.what) { |
| 362 | case CMD_NETWORK_CONNECTED: |
| 363 | transitionTo(mValidatedState); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 364 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 365 | default: |
| 366 | return NOT_HANDLED; |
| 367 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 368 | } |
| 369 | } |
| 370 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 371 | // Being in the MaybeNotifyState State indicates the user may have been notified that sign-in |
| 372 | // is required. This State takes care to clear the notification upon exit from the State. |
| 373 | private class MaybeNotifyState extends State { |
| 374 | @Override |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 375 | public boolean processMessage(Message message) { |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 376 | switch (message.what) { |
| 377 | case CMD_LAUNCH_CAPTIVE_PORTAL_APP: |
| 378 | final Intent intent = new Intent( |
| 379 | ConnectivityManager.ACTION_CAPTIVE_PORTAL_SIGN_IN); |
| 380 | intent.putExtra(ConnectivityManager.EXTRA_NETWORK, mNetworkAgentInfo.network); |
| 381 | intent.putExtra(ConnectivityManager.EXTRA_CAPTIVE_PORTAL_TOKEN, |
| 382 | mCaptivePortalLoggedInResponseToken); |
| 383 | intent.setFlags( |
| 384 | Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT | Intent.FLAG_ACTIVITY_NEW_TASK); |
| 385 | mContext.startActivityAsUser(intent, UserHandle.CURRENT); |
| 386 | return HANDLED; |
| 387 | default: |
| 388 | return NOT_HANDLED; |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | @Override |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 393 | public void exit() { |
| 394 | Message message = obtainMessage(EVENT_PROVISIONING_NOTIFICATION, 0, |
| 395 | mNetworkAgentInfo.network.netId, null); |
| 396 | mConnectivityServiceHandler.sendMessage(message); |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | // 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] | 401 | // connectivity, or that the user has indicated that this network is unwanted. |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 402 | private class EvaluatingState extends State { |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 403 | private int mReevaluateDelayMs; |
| 404 | private int mAttempts; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 405 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 406 | @Override |
| 407 | public void enter() { |
| 408 | sendMessage(CMD_REEVALUATE, ++mReevaluateToken, 0); |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 409 | if (mUidResponsibleForReeval != INVALID_UID) { |
| 410 | TrafficStats.setThreadStatsUid(mUidResponsibleForReeval); |
| 411 | mUidResponsibleForReeval = INVALID_UID; |
| 412 | } |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 413 | mReevaluateDelayMs = INITIAL_REEVALUATE_DELAY_MS; |
| 414 | mAttempts = 0; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 415 | } |
| 416 | |
| 417 | @Override |
| 418 | public boolean processMessage(Message message) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 419 | switch (message.what) { |
| 420 | case CMD_REEVALUATE: |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 421 | if (message.arg1 != mReevaluateToken || mUserDoesNotWant) |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 422 | return HANDLED; |
Paul Jensen | 2c311d6 | 2014-11-17 12:34:51 -0500 | [diff] [blame] | 423 | // Don't bother validating networks that don't satisify the default request. |
| 424 | // This includes: |
| 425 | // - VPNs which can be considered explicitly desired by the user and the |
| 426 | // user's desire trumps whether the network validates. |
| 427 | // - Networks that don't provide internet access. It's unclear how to |
| 428 | // validate such networks. |
| 429 | // - Untrusted networks. It's unsafe to prompt the user to sign-in to |
| 430 | // such networks and the user didn't express interest in connecting to |
| 431 | // such networks (an app did) so the user may be unhappily surprised when |
| 432 | // asked to sign-in to a network they didn't want to connect to in the |
| 433 | // first place. Validation could be done to adjust the network scores |
| 434 | // however these networks are app-requested and may not be intended for |
| 435 | // general usage, in which case general validation may not be an accurate |
| 436 | // measure of the network's quality. Only the app knows how to evaluate |
| 437 | // the network so don't bother validating here. Furthermore sending HTTP |
| 438 | // packets over the network may be undesirable, for example an extremely |
| 439 | // expensive metered network, or unwanted leaking of the User Agent string. |
| 440 | if (!mDefaultRequest.networkCapabilities.satisfiedByNetworkCapabilities( |
| 441 | mNetworkAgentInfo.networkCapabilities)) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 442 | transitionTo(mValidatedState); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 443 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 444 | } |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 445 | mAttempts++; |
Lorenzo Colitti | 351bfad | 2015-01-22 22:36:50 +0900 | [diff] [blame] | 446 | // Note: This call to isCaptivePortal() could take up to a minute. Resolving the |
| 447 | // server's IP addresses could hit the DNS timeout, and attempting connections |
| 448 | // to each of the server's several IP addresses (currently one IPv4 and one |
| 449 | // IPv6) could each take SOCKET_TIMEOUT_MS. During this time this StateMachine |
| 450 | // will be unresponsive. isCaptivePortal() could be executed on another Thread |
| 451 | // if this is found to cause problems. |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 452 | int httpResponseCode = isCaptivePortal(); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 453 | if (httpResponseCode == 204) { |
| 454 | transitionTo(mValidatedState); |
| 455 | } else if (httpResponseCode >= 200 && httpResponseCode <= 399) { |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 456 | transitionTo(mCaptivePortalState); |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 457 | } else { |
Paul Jensen | d9be23f | 2015-05-19 14:51:47 -0400 | [diff] [blame] | 458 | final Message msg = obtainMessage(CMD_REEVALUATE, ++mReevaluateToken, 0); |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 459 | sendMessageDelayed(msg, mReevaluateDelayMs); |
Paul Jensen | d9be23f | 2015-05-19 14:51:47 -0400 | [diff] [blame] | 460 | mConnectivityServiceHandler.sendMessage(obtainMessage( |
| 461 | EVENT_NETWORK_TESTED, NETWORK_TEST_RESULT_INVALID, 0, |
| 462 | mNetworkAgentInfo)); |
| 463 | if (mAttempts >= BLAME_FOR_EVALUATION_ATTEMPTS) { |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 464 | // Don't continue to blame UID forever. |
| 465 | TrafficStats.clearThreadStatsUid(); |
| 466 | } |
| 467 | mReevaluateDelayMs *= 2; |
| 468 | if (mReevaluateDelayMs > MAX_REEVALUATE_DELAY_MS) { |
| 469 | mReevaluateDelayMs = MAX_REEVALUATE_DELAY_MS; |
| 470 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 471 | } |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 472 | return HANDLED; |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 473 | case CMD_FORCE_REEVALUATION: |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 474 | // Before IGNORE_REEVALUATE_ATTEMPTS attempts are made, |
| 475 | // ignore any re-evaluation requests. After, restart the |
| 476 | // evaluation process via EvaluatingState#enter. |
| 477 | return mAttempts < IGNORE_REEVALUATE_ATTEMPTS ? HANDLED : NOT_HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 478 | default: |
| 479 | return NOT_HANDLED; |
| 480 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 481 | } |
Paul Jensen | 7ccd3df | 2014-08-29 09:54:01 -0400 | [diff] [blame] | 482 | |
| 483 | @Override |
| 484 | public void exit() { |
| 485 | TrafficStats.clearThreadStatsUid(); |
| 486 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 487 | } |
| 488 | |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 489 | // BroadcastReceiver that waits for a particular Intent and then posts a message. |
| 490 | private class CustomIntentReceiver extends BroadcastReceiver { |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 491 | private final int mToken; |
| 492 | private final int mWhat; |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 493 | private final String mAction; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 494 | CustomIntentReceiver(String action, int token, int what) { |
| 495 | mToken = token; |
| 496 | mWhat = what; |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 497 | mAction = action + "_" + mNetworkAgentInfo.network.netId + "_" + token; |
| 498 | mContext.registerReceiver(this, new IntentFilter(mAction)); |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 499 | } |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 500 | public PendingIntent getPendingIntent() { |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 501 | final Intent intent = new Intent(mAction); |
| 502 | intent.setPackage(mContext.getPackageName()); |
| 503 | return PendingIntent.getBroadcast(mContext, 0, intent, 0); |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 504 | } |
| 505 | @Override |
| 506 | public void onReceive(Context context, Intent intent) { |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 507 | if (intent.getAction().equals(mAction)) sendMessage(obtainMessage(mWhat, mToken)); |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 508 | } |
| 509 | } |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 510 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 511 | // Being in the CaptivePortalState State indicates a captive portal was detected and the user |
| 512 | // has been shown a notification to sign-in. |
| 513 | private class CaptivePortalState extends State { |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 514 | private static final String ACTION_LAUNCH_CAPTIVE_PORTAL_APP = |
| 515 | "android.net.netmon.launchCaptivePortalApp"; |
| 516 | |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 517 | @Override |
| 518 | public void enter() { |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 519 | mConnectivityServiceHandler.sendMessage(obtainMessage(EVENT_NETWORK_TESTED, |
| 520 | NETWORK_TEST_RESULT_INVALID, 0, mNetworkAgentInfo)); |
Paul Jensen | d0491e9a | 2015-05-05 14:52:22 -0400 | [diff] [blame] | 521 | // Don't annoy user with sign-in notifications. |
Paul Jensen | 700f236 | 2015-05-05 14:56:10 -0400 | [diff] [blame] | 522 | if (mDontDisplaySigninNotification) return; |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 523 | // Create a CustomIntentReceiver that sends us a |
| 524 | // CMD_LAUNCH_CAPTIVE_PORTAL_APP message when the user |
| 525 | // touches the notification. |
| 526 | if (mLaunchCaptivePortalAppBroadcastReceiver == null) { |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 527 | // Wait for result. |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 528 | mLaunchCaptivePortalAppBroadcastReceiver = new CustomIntentReceiver( |
| 529 | ACTION_LAUNCH_CAPTIVE_PORTAL_APP, new Random().nextInt(), |
| 530 | CMD_LAUNCH_CAPTIVE_PORTAL_APP); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 531 | } |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 532 | // Display the sign in notification. |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 533 | Message message = obtainMessage(EVENT_PROVISIONING_NOTIFICATION, 1, |
| 534 | mNetworkAgentInfo.network.netId, |
Paul Jensen | 25a217c | 2015-02-27 22:55:47 -0500 | [diff] [blame] | 535 | mLaunchCaptivePortalAppBroadcastReceiver.getPendingIntent()); |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 536 | mConnectivityServiceHandler.sendMessage(message); |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 537 | // Retest for captive portal occasionally. |
| 538 | sendMessageDelayed(CMD_CAPTIVE_PORTAL_RECHECK, 0 /* no UID */, |
| 539 | CAPTIVE_PORTAL_REEVALUATE_DELAY_MS); |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 540 | } |
| 541 | |
| 542 | @Override |
Paul Jensen | ee3e2ce | 2015-06-17 15:02:54 -0400 | [diff] [blame] | 543 | public void exit() { |
| 544 | removeMessages(CMD_CAPTIVE_PORTAL_RECHECK); |
| 545 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 546 | } |
| 547 | |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 548 | // Being in the LingeringState State indicates a Network's validated bit is true and it once |
| 549 | // was the highest scoring Network satisfying a particular NetworkRequest, but since then |
| 550 | // another Network satsified the NetworkRequest with a higher score and hence this Network |
| 551 | // is "lingered" for a fixed period of time before it is disconnected. This period of time |
| 552 | // allows apps to wrap up communication and allows for seamless reactivation if the other |
| 553 | // higher scoring Network happens to disconnect. |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 554 | private class LingeringState extends State { |
Paul Jensen | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 555 | private static final String ACTION_LINGER_EXPIRED = "android.net.netmon.lingerExpired"; |
Paul Jensen | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 556 | |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 557 | private CustomIntentReceiver mBroadcastReceiver; |
Paul Jensen | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 558 | private PendingIntent mIntent; |
| 559 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 560 | @Override |
| 561 | public void enter() { |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 562 | mLingerToken = new Random().nextInt(); |
| 563 | mBroadcastReceiver = new CustomIntentReceiver(ACTION_LINGER_EXPIRED, mLingerToken, |
Paul Jensen | dcbe835 | 2014-09-16 16:28:34 -0400 | [diff] [blame] | 564 | CMD_LINGER_EXPIRED); |
| 565 | mIntent = mBroadcastReceiver.getPendingIntent(); |
Paul Jensen | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 566 | long wakeupTime = SystemClock.elapsedRealtime() + mLingerDelayMs; |
| 567 | mAlarmManager.setWindow(AlarmManager.ELAPSED_REALTIME_WAKEUP, wakeupTime, |
| 568 | // Give a specific window so we aren't subject to unknown inexactitude. |
| 569 | mLingerDelayMs / 6, mIntent); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | @Override |
| 573 | public boolean processMessage(Message message) { |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 574 | switch (message.what) { |
| 575 | case CMD_NETWORK_CONNECTED: |
Paul Jensen | 22e547a | 2015-06-25 09:17:53 -0400 | [diff] [blame^] | 576 | log("Unlingered"); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 577 | // Go straight to active as we've already evaluated. |
| 578 | transitionTo(mValidatedState); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 579 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 580 | case CMD_LINGER_EXPIRED: |
| 581 | if (message.arg1 != mLingerToken) |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 582 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 583 | mConnectivityServiceHandler.sendMessage( |
| 584 | obtainMessage(EVENT_NETWORK_LINGER_COMPLETE, mNetworkAgentInfo)); |
Paul Jensen | d6a3f7e | 2014-08-19 09:40:11 -0400 | [diff] [blame] | 585 | return HANDLED; |
Paul Jensen | ad50a1f | 2014-09-05 12:06:44 -0400 | [diff] [blame] | 586 | case CMD_FORCE_REEVALUATION: |
| 587 | // Ignore reevaluation attempts when lingering. A reevaluation could result |
| 588 | // in a transition to the validated state which would abort the linger |
| 589 | // timeout. Lingering is the result of score assessment; validity is |
| 590 | // irrelevant. |
| 591 | return HANDLED; |
Paul Jensen | 71b645f | 2014-10-13 14:13:07 -0400 | [diff] [blame] | 592 | case CMD_CAPTIVE_PORTAL_APP_FINISHED: |
| 593 | // Ignore user network determination as this could abort linger timeout. |
| 594 | // Networks are only lingered once validated because: |
| 595 | // - Unvalidated networks are never lingered (see rematchNetworkAndRequests). |
| 596 | // - Once validated, a Network's validated bit is never cleared. |
| 597 | // Since networks are only lingered after being validated a user's |
| 598 | // determination will not change the death sentence that lingering entails: |
| 599 | // - If the user wants to use the network or bypasses the captive portal, |
| 600 | // the network's score will not be increased beyond its current value |
| 601 | // because it is already validated. Without a score increase there is no |
| 602 | // chance of reactivation (i.e. aborting linger timeout). |
| 603 | // - If the user does not want the network, lingering will disconnect the |
| 604 | // network anyhow. |
| 605 | return HANDLED; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 606 | default: |
| 607 | return NOT_HANDLED; |
| 608 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 609 | } |
Paul Jensen | 79a0805 | 2014-08-21 12:44:07 -0400 | [diff] [blame] | 610 | |
| 611 | @Override |
| 612 | public void exit() { |
| 613 | mAlarmManager.cancel(mIntent); |
| 614 | mContext.unregisterReceiver(mBroadcastReceiver); |
| 615 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 616 | } |
| 617 | |
| 618 | /** |
| 619 | * Do a URL fetch on a known server to see if we get the data we expect. |
| 620 | * Returns HTTP response code. |
| 621 | */ |
| 622 | private int isCaptivePortal() { |
| 623 | if (!mIsCaptivePortalCheckEnabled) return 204; |
| 624 | |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 625 | HttpURLConnection urlConnection = null; |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 626 | int httpResponseCode = 599; |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 627 | try { |
Paul Jensen | e547ff2 | 2014-08-04 09:12:24 -0400 | [diff] [blame] | 628 | URL url = new URL("http", mServer, "/generate_204"); |
Paul Jensen | 8fe1742 | 2015-02-02 11:03:03 -0500 | [diff] [blame] | 629 | // On networks with a PAC instead of fetching a URL that should result in a 204 |
| 630 | // reponse, we instead simply fetch the PAC script. This is done for a few reasons: |
| 631 | // 1. At present our PAC code does not yet handle multiple PACs on multiple networks |
| 632 | // until something like https://android-review.googlesource.com/#/c/115180/ lands. |
| 633 | // Network.openConnection() will ignore network-specific PACs and instead fetch |
| 634 | // using NO_PROXY. If a PAC is in place, the only fetch we know will succeed with |
| 635 | // NO_PROXY is the fetch of the PAC itself. |
| 636 | // 2. To proxy the generate_204 fetch through a PAC would require a number of things |
| 637 | // happen before the fetch can commence, namely: |
| 638 | // a) the PAC script be fetched |
| 639 | // b) a PAC script resolver service be fired up and resolve mServer |
| 640 | // Network validation could be delayed until these prerequisities are satisifed or |
| 641 | // could simply be left to race them. Neither is an optimal solution. |
| 642 | // 3. PAC scripts are sometimes used to block or restrict Internet access and may in |
| 643 | // fact block fetching of the generate_204 URL which would lead to false negative |
| 644 | // results for network validation. |
| 645 | boolean fetchPac = false; |
| 646 | { |
| 647 | final ProxyInfo proxyInfo = mNetworkAgentInfo.linkProperties.getHttpProxy(); |
| 648 | if (proxyInfo != null && !Uri.EMPTY.equals(proxyInfo.getPacFileUrl())) { |
| 649 | url = new URL(proxyInfo.getPacFileUrl().toString()); |
| 650 | fetchPac = true; |
| 651 | } |
| 652 | } |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 653 | validationLog("Checking " + url.toString() + " on " + |
| 654 | mNetworkAgentInfo.networkInfo.getExtraInfo()); |
Lorenzo Colitti | 9f1274b | 2014-08-21 11:45:54 -0700 | [diff] [blame] | 655 | urlConnection = (HttpURLConnection) mNetworkAgentInfo.network.openConnection(url); |
Paul Jensen | 8fe1742 | 2015-02-02 11:03:03 -0500 | [diff] [blame] | 656 | urlConnection.setInstanceFollowRedirects(fetchPac); |
Paul Jensen | e547ff2 | 2014-08-04 09:12:24 -0400 | [diff] [blame] | 657 | urlConnection.setConnectTimeout(SOCKET_TIMEOUT_MS); |
| 658 | urlConnection.setReadTimeout(SOCKET_TIMEOUT_MS); |
| 659 | urlConnection.setUseCaches(false); |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 660 | |
| 661 | // Time how long it takes to get a response to our request |
| 662 | long requestTimestamp = SystemClock.elapsedRealtime(); |
| 663 | |
Paul Jensen | e547ff2 | 2014-08-04 09:12:24 -0400 | [diff] [blame] | 664 | urlConnection.getInputStream(); |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 665 | |
| 666 | // Time how long it takes to get a response to our request |
| 667 | long responseTimestamp = SystemClock.elapsedRealtime(); |
| 668 | |
Paul Jensen | e547ff2 | 2014-08-04 09:12:24 -0400 | [diff] [blame] | 669 | httpResponseCode = urlConnection.getResponseCode(); |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 670 | validationLog("isCaptivePortal: ret=" + httpResponseCode + |
| 671 | " headers=" + urlConnection.getHeaderFields()); |
Paul Jensen | e547ff2 | 2014-08-04 09:12:24 -0400 | [diff] [blame] | 672 | // NOTE: We may want to consider an "HTTP/1.0 204" response to be a captive |
| 673 | // portal. The only example of this seen so far was a captive portal. For |
| 674 | // the time being go with prior behavior of assuming it's not a captive |
| 675 | // portal. If it is considered a captive portal, a different sign-in URL |
| 676 | // is needed (i.e. can't browse a 204). This could be the result of an HTTP |
| 677 | // proxy server. |
| 678 | |
| 679 | // Consider 200 response with "Content-length=0" to not be a captive portal. |
| 680 | // There's no point in considering this a captive portal as the user cannot |
| 681 | // sign-in to an empty page. Probably the result of a broken transparent proxy. |
| 682 | // See http://b/9972012. |
| 683 | if (httpResponseCode == 200 && urlConnection.getContentLength() == 0) { |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 684 | validationLog("Empty 200 response interpreted as 204 response."); |
Paul Jensen | e547ff2 | 2014-08-04 09:12:24 -0400 | [diff] [blame] | 685 | httpResponseCode = 204; |
| 686 | } |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 687 | |
Paul Jensen | 8fe1742 | 2015-02-02 11:03:03 -0500 | [diff] [blame] | 688 | if (httpResponseCode == 200 && fetchPac) { |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 689 | validationLog("PAC fetch 200 response interpreted as 204 response."); |
Paul Jensen | 8fe1742 | 2015-02-02 11:03:03 -0500 | [diff] [blame] | 690 | httpResponseCode = 204; |
| 691 | } |
| 692 | |
Jeff Davidson | f9fff92 | 2014-12-05 16:56:08 -0800 | [diff] [blame] | 693 | sendNetworkConditionsBroadcast(true /* response received */, |
| 694 | httpResponseCode != 204 /* isCaptivePortal */, |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 695 | requestTimestamp, responseTimestamp); |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 696 | } catch (IOException e) { |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 697 | validationLog("Probably not a portal: exception " + e); |
Paul Jensen | 869868be | 2014-05-15 10:33:05 -0400 | [diff] [blame] | 698 | if (httpResponseCode == 599) { |
| 699 | // TODO: Ping gateway and DNS server and log results. |
| 700 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 701 | } finally { |
| 702 | if (urlConnection != null) { |
| 703 | urlConnection.disconnect(); |
| 704 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 705 | } |
| 706 | return httpResponseCode; |
| 707 | } |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 708 | |
| 709 | /** |
| 710 | * @param responseReceived - whether or not we received a valid HTTP response to our request. |
| 711 | * If false, isCaptivePortal and responseTimestampMs are ignored |
| 712 | * TODO: This should be moved to the transports. The latency could be passed to the transports |
| 713 | * along with the captive portal result. Currently the TYPE_MOBILE broadcasts appear unused so |
| 714 | * perhaps this could just be added to the WiFi transport only. |
| 715 | */ |
| 716 | private void sendNetworkConditionsBroadcast(boolean responseReceived, boolean isCaptivePortal, |
| 717 | long requestTimestampMs, long responseTimestampMs) { |
| 718 | if (Settings.Global.getInt(mContext.getContentResolver(), |
| 719 | Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE, 0) == 0) { |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 720 | return; |
| 721 | } |
| 722 | |
Robert Greenwalt | fb68f8f | 2014-08-13 13:43:32 -0700 | [diff] [blame] | 723 | if (systemReady == false) return; |
| 724 | |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 725 | Intent latencyBroadcast = new Intent(ACTION_NETWORK_CONDITIONS_MEASURED); |
| 726 | switch (mNetworkAgentInfo.networkInfo.getType()) { |
| 727 | case ConnectivityManager.TYPE_WIFI: |
| 728 | WifiInfo currentWifiInfo = mWifiManager.getConnectionInfo(); |
| 729 | if (currentWifiInfo != null) { |
| 730 | // NOTE: getSSID()'s behavior changed in API 17; before that, SSIDs were not |
| 731 | // surrounded by double quotation marks (thus violating the Javadoc), but this |
| 732 | // was changed to match the Javadoc in API 17. Since clients may have started |
| 733 | // sanitizing the output of this method since API 17 was released, we should |
| 734 | // not change it here as it would become impossible to tell whether the SSID is |
| 735 | // simply being surrounded by quotes due to the API, or whether those quotes |
| 736 | // are actually part of the SSID. |
| 737 | latencyBroadcast.putExtra(EXTRA_SSID, currentWifiInfo.getSSID()); |
| 738 | latencyBroadcast.putExtra(EXTRA_BSSID, currentWifiInfo.getBSSID()); |
| 739 | } else { |
| 740 | if (DBG) logw("network info is TYPE_WIFI but no ConnectionInfo found"); |
| 741 | return; |
| 742 | } |
| 743 | break; |
| 744 | case ConnectivityManager.TYPE_MOBILE: |
| 745 | latencyBroadcast.putExtra(EXTRA_NETWORK_TYPE, mTelephonyManager.getNetworkType()); |
| 746 | List<CellInfo> info = mTelephonyManager.getAllCellInfo(); |
| 747 | if (info == null) return; |
| 748 | int numRegisteredCellInfo = 0; |
| 749 | for (CellInfo cellInfo : info) { |
| 750 | if (cellInfo.isRegistered()) { |
| 751 | numRegisteredCellInfo++; |
| 752 | if (numRegisteredCellInfo > 1) { |
Paul Jensen | 22e547a | 2015-06-25 09:17:53 -0400 | [diff] [blame^] | 753 | log("more than one registered CellInfo. Can't " + |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 754 | "tell which is active. Bailing."); |
| 755 | return; |
| 756 | } |
| 757 | if (cellInfo instanceof CellInfoCdma) { |
| 758 | CellIdentityCdma cellId = ((CellInfoCdma) cellInfo).getCellIdentity(); |
| 759 | latencyBroadcast.putExtra(EXTRA_CELL_ID, cellId); |
| 760 | } else if (cellInfo instanceof CellInfoGsm) { |
| 761 | CellIdentityGsm cellId = ((CellInfoGsm) cellInfo).getCellIdentity(); |
| 762 | latencyBroadcast.putExtra(EXTRA_CELL_ID, cellId); |
| 763 | } else if (cellInfo instanceof CellInfoLte) { |
| 764 | CellIdentityLte cellId = ((CellInfoLte) cellInfo).getCellIdentity(); |
| 765 | latencyBroadcast.putExtra(EXTRA_CELL_ID, cellId); |
| 766 | } else if (cellInfo instanceof CellInfoWcdma) { |
| 767 | CellIdentityWcdma cellId = ((CellInfoWcdma) cellInfo).getCellIdentity(); |
| 768 | latencyBroadcast.putExtra(EXTRA_CELL_ID, cellId); |
| 769 | } else { |
| 770 | if (DBG) logw("Registered cellinfo is unrecognized"); |
| 771 | return; |
| 772 | } |
| 773 | } |
| 774 | } |
| 775 | break; |
| 776 | default: |
| 777 | return; |
| 778 | } |
| 779 | latencyBroadcast.putExtra(EXTRA_CONNECTIVITY_TYPE, mNetworkAgentInfo.networkInfo.getType()); |
| 780 | latencyBroadcast.putExtra(EXTRA_RESPONSE_RECEIVED, responseReceived); |
| 781 | latencyBroadcast.putExtra(EXTRA_REQUEST_TIMESTAMP_MS, requestTimestampMs); |
| 782 | |
| 783 | if (responseReceived) { |
| 784 | latencyBroadcast.putExtra(EXTRA_IS_CAPTIVE_PORTAL, isCaptivePortal); |
| 785 | latencyBroadcast.putExtra(EXTRA_RESPONSE_TIMESTAMP_MS, responseTimestampMs); |
| 786 | } |
Paul Jensen | 5529858 | 2014-08-20 11:01:41 -0400 | [diff] [blame] | 787 | mContext.sendBroadcastAsUser(latencyBroadcast, UserHandle.CURRENT, |
| 788 | PERMISSION_ACCESS_NETWORK_CONDITIONS); |
Paul Jensen | 306f1a4 | 2014-08-04 10:59:01 -0400 | [diff] [blame] | 789 | } |
Paul Jensen | d7b6ca9 | 2015-05-13 14:05:12 -0400 | [diff] [blame] | 790 | |
| 791 | // Allow tests to override linger time. |
| 792 | @VisibleForTesting |
| 793 | public static void SetDefaultLingerTime(int time_ms) { |
| 794 | if (Process.myUid() == Process.SYSTEM_UID) { |
| 795 | throw new SecurityException("SetDefaultLingerTime only for internal testing."); |
| 796 | } |
| 797 | DEFAULT_LINGER_DELAY_MS = time_ms; |
| 798 | } |
Paul Jensen | ca8f16a | 2014-05-09 12:47:55 -0400 | [diff] [blame] | 799 | } |