Blame - service/src/com/android/server/ConnectivityService.java - packages_modules_Connectivity

2021-05-12 14:15:24 +0000

[diff] [blame]

/*

*

* 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;

18

19

import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE;

20

import static android.content.pm.PackageManager.FEATURE_BLUETOOTH;

21

import static android.content.pm.PackageManager.FEATURE_WATCH;

22

import static android.content.pm.PackageManager.FEATURE_WIFI;

23

import static android.content.pm.PackageManager.FEATURE_WIFI_DIRECT;

24

import static android.content.pm.PackageManager.PERMISSION_GRANTED;

25

import static android.net.ConnectivityDiagnosticsManager.ConnectivityReport.KEY_NETWORK_PROBES_ATTEMPTED_BITMASK;

26

import static android.net.ConnectivityDiagnosticsManager.ConnectivityReport.KEY_NETWORK_PROBES_SUCCEEDED_BITMASK;

27

import static android.net.ConnectivityDiagnosticsManager.ConnectivityReport.KEY_NETWORK_VALIDATION_RESULT;

28

import static android.net.ConnectivityDiagnosticsManager.DataStallReport.DETECTION_METHOD_DNS_EVENTS;

29

import static android.net.ConnectivityDiagnosticsManager.DataStallReport.DETECTION_METHOD_TCP_METRICS;

30

import static android.net.ConnectivityDiagnosticsManager.DataStallReport.KEY_DNS_CONSECUTIVE_TIMEOUTS;

31

import static android.net.ConnectivityDiagnosticsManager.DataStallReport.KEY_TCP_METRICS_COLLECTION_PERIOD_MILLIS;

32

import static android.net.ConnectivityDiagnosticsManager.DataStallReport.KEY_TCP_PACKET_FAIL_RATE;

33

import static android.net.ConnectivityManager.BLOCKED_METERED_REASON_MASK;

34

import static android.net.ConnectivityManager.BLOCKED_REASON_LOCKDOWN_VPN;

35

import static android.net.ConnectivityManager.BLOCKED_REASON_NONE;

36

import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;

37

import static android.net.ConnectivityManager.TYPE_BLUETOOTH;

38

import static android.net.ConnectivityManager.TYPE_ETHERNET;

39

import static android.net.ConnectivityManager.TYPE_MOBILE;

40

import static android.net.ConnectivityManager.TYPE_MOBILE_CBS;

41

import static android.net.ConnectivityManager.TYPE_MOBILE_DUN;

42

import static android.net.ConnectivityManager.TYPE_MOBILE_EMERGENCY;

43

import static android.net.ConnectivityManager.TYPE_MOBILE_FOTA;

44

import static android.net.ConnectivityManager.TYPE_MOBILE_HIPRI;

45

import static android.net.ConnectivityManager.TYPE_MOBILE_IA;

46

import static android.net.ConnectivityManager.TYPE_MOBILE_IMS;

47

import static android.net.ConnectivityManager.TYPE_MOBILE_MMS;

48

import static android.net.ConnectivityManager.TYPE_MOBILE_SUPL;

49

import static android.net.ConnectivityManager.TYPE_NONE;

50

import static android.net.ConnectivityManager.TYPE_PROXY;

51

import static android.net.ConnectivityManager.TYPE_VPN;

52

import static android.net.ConnectivityManager.TYPE_WIFI;

53

import static android.net.ConnectivityManager.TYPE_WIFI_P2P;

54

import static android.net.ConnectivityManager.getNetworkTypeName;

55

import static android.net.ConnectivityManager.isNetworkTypeValid;

56

import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_OPPORTUNISTIC;

57

import static android.net.INetworkMonitor.NETWORK_VALIDATION_PROBE_PRIVDNS;

58

import static android.net.INetworkMonitor.NETWORK_VALIDATION_RESULT_PARTIAL;

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

59

import static android.net.INetworkMonitor.NETWORK_VALIDATION_RESULT_SKIPPED;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

60

import static android.net.INetworkMonitor.NETWORK_VALIDATION_RESULT_VALID;

61

import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL;

62

import static android.net.NetworkCapabilities.NET_CAPABILITY_ENTERPRISE;

63

import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND;

64

import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;

65

import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED;

66

import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED;

67

import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED;

68

import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING;

69

import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED;

70

import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED;

71

import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN;

72

import static android.net.NetworkCapabilities.NET_CAPABILITY_OEM_PAID;

73

import static android.net.NetworkCapabilities.NET_CAPABILITY_OEM_PRIVATE;

74

import static android.net.NetworkCapabilities.NET_CAPABILITY_PARTIAL_CONNECTIVITY;

75

import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;

76

import static android.net.NetworkCapabilities.REDACT_FOR_ACCESS_FINE_LOCATION;

77

import static android.net.NetworkCapabilities.REDACT_FOR_LOCAL_MAC_ADDRESS;

78

import static android.net.NetworkCapabilities.REDACT_FOR_NETWORK_SETTINGS;

79

import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;

80

import static android.net.NetworkCapabilities.TRANSPORT_TEST;

81

import static android.net.NetworkCapabilities.TRANSPORT_VPN;

Cody Kesting

7474f67

2021-05-11 14:22:40 -0700

[diff] [blame]

82

import static android.net.NetworkCapabilities.TRANSPORT_WIFI;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

83

import static android.net.NetworkRequest.Type.LISTEN_FOR_BEST;

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

84

import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST;

85

import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST_ONLY;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

86

import static android.net.shared.NetworkMonitorUtils.isPrivateDnsValidationRequired;

87

import static android.os.Process.INVALID_UID;

88

import static android.os.Process.VPN_UID;

89

import static android.system.OsConstants.IPPROTO_TCP;

90

import static android.system.OsConstants.IPPROTO_UDP;

91

92

import static java.util.Map.Entry;

93

94

import android.Manifest;

95

import android.annotation.NonNull;

96

import android.annotation.Nullable;

97

import android.app.AppOpsManager;

98

import android.app.BroadcastOptions;

99

import android.app.PendingIntent;

100

import android.app.usage.NetworkStatsManager;

101

import android.content.BroadcastReceiver;

102

import android.content.ComponentName;

103

import android.content.ContentResolver;

104

import android.content.Context;

105

import android.content.Intent;

106

import android.content.IntentFilter;

107

import android.content.pm.PackageManager;

108

import android.database.ContentObserver;

109

import android.net.CaptivePortal;

110

import android.net.CaptivePortalData;

111

import android.net.ConnectionInfo;

112

import android.net.ConnectivityDiagnosticsManager.ConnectivityReport;

113

import android.net.ConnectivityDiagnosticsManager.DataStallReport;

114

import android.net.ConnectivityManager;

115

import android.net.ConnectivityManager.BlockedReason;

116

import android.net.ConnectivityManager.NetworkCallback;

Aaron Huang

cff2294

2021-05-27 16:31:26 +0800

[diff] [blame]

117

import android.net.ConnectivityManager.RestrictBackgroundStatus;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

118

import android.net.ConnectivityResources;

119

import android.net.ConnectivitySettingsManager;

120

import android.net.DataStallReportParcelable;

121

import android.net.DnsResolverServiceManager;

122

import android.net.ICaptivePortal;

123

import android.net.IConnectivityDiagnosticsCallback;

124

import android.net.IConnectivityManager;

125

import android.net.IDnsResolver;

126

import android.net.INetd;

127

import android.net.INetworkActivityListener;

128

import android.net.INetworkAgent;

129

import android.net.INetworkMonitor;

130

import android.net.INetworkMonitorCallbacks;

131

import android.net.INetworkOfferCallback;

132

import android.net.IOnCompleteListener;

133

import android.net.IQosCallback;

134

import android.net.ISocketKeepaliveCallback;

135

import android.net.InetAddresses;

136

import android.net.IpMemoryStore;

137

import android.net.IpPrefix;

138

import android.net.LinkProperties;

139

import android.net.MatchAllNetworkSpecifier;

140

import android.net.NativeNetworkConfig;

141

import android.net.NativeNetworkType;

142

import android.net.NattSocketKeepalive;

143

import android.net.Network;

144

import android.net.NetworkAgent;

145

import android.net.NetworkAgentConfig;

146

import android.net.NetworkCapabilities;

147

import android.net.NetworkInfo;

148

import android.net.NetworkInfo.DetailedState;

149

import android.net.NetworkMonitorManager;

150

import android.net.NetworkPolicyManager;

151

import android.net.NetworkPolicyManager.NetworkPolicyCallback;

152

import android.net.NetworkProvider;

153

import android.net.NetworkRequest;

154

import android.net.NetworkScore;

155

import android.net.NetworkSpecifier;

156

import android.net.NetworkStack;

157

import android.net.NetworkState;

158

import android.net.NetworkStateSnapshot;

159

import android.net.NetworkTestResultParcelable;

160

import android.net.NetworkUtils;

161

import android.net.NetworkWatchlistManager;

162

import android.net.OemNetworkPreferences;

163

import android.net.PrivateDnsConfigParcel;

164

import android.net.ProxyInfo;

165

import android.net.QosCallbackException;

166

import android.net.QosFilter;

167

import android.net.QosSocketFilter;

168

import android.net.QosSocketInfo;

169

import android.net.RouteInfo;

170

import android.net.RouteInfoParcel;

171

import android.net.SocketKeepalive;

172

import android.net.TetheringManager;

173

import android.net.TransportInfo;

174

import android.net.UidRange;

175

import android.net.UidRangeParcel;

176

import android.net.UnderlyingNetworkInfo;

177

import android.net.Uri;

178

import android.net.VpnManager;

179

import android.net.VpnTransportInfo;

180

import android.net.metrics.IpConnectivityLog;

181

import android.net.metrics.NetworkEvent;

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

182

import android.net.netd.aidl.NativeUidRangeConfig;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

183

import android.net.netlink.InetDiagMessage;

184

import android.net.networkstack.ModuleNetworkStackClient;

185

import android.net.networkstack.NetworkStackClientBase;

186

import android.net.resolv.aidl.DnsHealthEventParcel;

187

import android.net.resolv.aidl.IDnsResolverUnsolicitedEventListener;

188

import android.net.resolv.aidl.Nat64PrefixEventParcel;

189

import android.net.resolv.aidl.PrivateDnsValidationEventParcel;

190

import android.net.shared.PrivateDnsConfig;

191

import android.net.util.MultinetworkPolicyTracker;

192

import android.os.BatteryStatsManager;

193

import android.os.Binder;

194

import android.os.Build;

195

import android.os.Bundle;

196

import android.os.Handler;

197

import android.os.HandlerThread;

198

import android.os.IBinder;

199

import android.os.Looper;

200

import android.os.Message;

201

import android.os.Messenger;

202

import android.os.ParcelFileDescriptor;

203

import android.os.Parcelable;

204

import android.os.PersistableBundle;

205

import android.os.PowerManager;

206

import android.os.Process;

207

import android.os.RemoteCallbackList;

208

import android.os.RemoteException;

209

import android.os.ServiceSpecificException;

210

import android.os.SystemClock;

211

import android.os.SystemProperties;

212

import android.os.UserHandle;

213

import android.os.UserManager;

214

import android.provider.Settings;

215

import android.sysprop.NetworkProperties;

216

import android.telephony.TelephonyManager;

217

import android.text.TextUtils;

218

import android.util.ArrayMap;

219

import android.util.ArraySet;

220

import android.util.LocalLog;

221

import android.util.Log;

222

import android.util.Pair;

223

import android.util.SparseArray;

224

import android.util.SparseIntArray;

225

226

import com.android.connectivity.resources.R;

227

import com.android.internal.annotations.GuardedBy;

228

import com.android.internal.annotations.VisibleForTesting;

229

import com.android.internal.util.IndentingPrintWriter;

230

import com.android.internal.util.MessageUtils;

231

import com.android.modules.utils.BasicShellCommandHandler;

232

import com.android.net.module.util.BaseNetdUnsolicitedEventListener;

233

import com.android.net.module.util.CollectionUtils;

234

import com.android.net.module.util.LinkPropertiesUtils.CompareOrUpdateResult;

235

import com.android.net.module.util.LinkPropertiesUtils.CompareResult;

236

import com.android.net.module.util.LocationPermissionChecker;

237

import com.android.net.module.util.NetworkCapabilitiesUtils;

238

import com.android.net.module.util.PermissionUtils;

239

import com.android.server.connectivity.AutodestructReference;

240

import com.android.server.connectivity.DnsManager;

241

import com.android.server.connectivity.DnsManager.PrivateDnsValidationUpdate;

242

import com.android.server.connectivity.FullScore;

243

import com.android.server.connectivity.KeepaliveTracker;

244

import com.android.server.connectivity.LingerMonitor;

245

import com.android.server.connectivity.MockableSystemProperties;

246

import com.android.server.connectivity.NetworkAgentInfo;

247

import com.android.server.connectivity.NetworkDiagnostics;

248

import com.android.server.connectivity.NetworkNotificationManager;

249

import com.android.server.connectivity.NetworkNotificationManager.NotificationType;

250

import com.android.server.connectivity.NetworkOffer;

251

import com.android.server.connectivity.NetworkRanker;

252

import com.android.server.connectivity.PermissionMonitor;

253

import com.android.server.connectivity.ProfileNetworkPreferences;

254

import com.android.server.connectivity.ProxyTracker;

255

import com.android.server.connectivity.QosCallbackTracker;

256

257

import libcore.io.IoUtils;

258

259

import java.io.FileDescriptor;

260

import java.io.PrintWriter;

261

import java.net.Inet4Address;

262

import java.net.InetAddress;

263

import java.net.InetSocketAddress;

264

import java.net.UnknownHostException;

265

import java.util.ArrayList;

266

import java.util.Arrays;

267

import java.util.Collection;

268

import java.util.Collections;

269

import java.util.Comparator;

270

import java.util.ConcurrentModificationException;

271

import java.util.HashMap;

272

import java.util.HashSet;

273

import java.util.List;

274

import java.util.Map;

275

import java.util.Objects;

276

import java.util.Set;

277

import java.util.SortedSet;

278

import java.util.StringJoiner;

279

import java.util.TreeSet;

280

import java.util.concurrent.atomic.AtomicInteger;

/**

* @hide

*/

public class ConnectivityService extends IConnectivityManager.Stub

286

implements PendingIntent.OnFinished {

287

private static final String TAG = ConnectivityService.class.getSimpleName();

288

289

private static final String DIAG_ARG = "--diag";

290

public static final String SHORT_ARG = "--short";

291

private static final String NETWORK_ARG = "networks";

292

private static final String REQUEST_ARG = "requests";

293

294

private static final boolean DBG = true;

295

private static final boolean DDBG = Log.isLoggable(TAG, Log.DEBUG);

296

private static final boolean VDBG = Log.isLoggable(TAG, Log.VERBOSE);

297

298

private static final boolean LOGD_BLOCKED_NETWORKINFO = true;

299

300

/**

301

* Default URL to use for {@link #getCaptivePortalServerUrl()}. This should not be changed

302

* by OEMs for configuration purposes, as this value is overridden by

303

* ConnectivitySettingsManager.CAPTIVE_PORTAL_HTTP_URL.

304

* R.string.config_networkCaptivePortalServerUrl should be overridden instead for this purpose

305

* (preferably via runtime resource overlays).

306

*/

307

private static final String DEFAULT_CAPTIVE_PORTAL_HTTP_URL =

308

"http://connectivitycheck.gstatic.com/generate_204";

309

310

// TODO: create better separation between radio types and network types

311

312

// how long to wait before switching back to a radio's default network

313

private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000;

314

// system property that can override the above value

315

private static final String NETWORK_RESTORE_DELAY_PROP_NAME =

316

"android.telephony.apn-restore";

317

318

// How long to wait before putting up a "This network doesn't have an Internet connection,

319

// connect anyway?" dialog after the user selects a network that doesn't validate.

320

private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000;

321

322

// Default to 30s linger time-out, and 5s for nascent network. Modifiable only for testing.

323

private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger";

324

private static final int DEFAULT_LINGER_DELAY_MS = 30_000;

325

private static final int DEFAULT_NASCENT_DELAY_MS = 5_000;

326

327

// The maximum number of network request allowed per uid before an exception is thrown.

328

private static final int MAX_NETWORK_REQUESTS_PER_UID = 100;

329

330

// The maximum number of network request allowed for system UIDs before an exception is thrown.

331

@VisibleForTesting

332

static final int MAX_NETWORK_REQUESTS_PER_SYSTEM_UID = 250;

333

334

@VisibleForTesting

335

protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it.

336

@VisibleForTesting

337

protected int mNascentDelayMs;

338

339

// How long to delay to removal of a pending intent based request.

340

// See ConnectivitySettingsManager.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS

341

private final int mReleasePendingIntentDelayMs;

342

343

private MockableSystemProperties mSystemProperties;

344

345

@VisibleForTesting

346

protected final PermissionMonitor mPermissionMonitor;

347

348

private final PerUidCounter mNetworkRequestCounter;

349

@VisibleForTesting

350

final PerUidCounter mSystemNetworkRequestCounter;

351

352

private volatile boolean mLockdownEnabled;

353

354

/**

355

* Stale copy of uid blocked reasons provided by NPMS. As long as they are accessed only in

356

* internal handler thread, they don't need a lock.

357

*/

358

private SparseIntArray mUidBlockedReasons = new SparseIntArray();

359

360

private final Context mContext;

361

private final ConnectivityResources mResources;

362

// The Context is created for UserHandle.ALL.

363

private final Context mUserAllContext;

364

private final Dependencies mDeps;

365

// 0 is full bad, 100 is full good

366

private int mDefaultInetConditionPublished = 0;

367

368

@VisibleForTesting

369

protected IDnsResolver mDnsResolver;

370

@VisibleForTesting

371

protected INetd mNetd;

372

private NetworkStatsManager mStatsManager;

373

private NetworkPolicyManager mPolicyManager;

374

private final NetdCallback mNetdCallback;

375

376

/**

377

* TestNetworkService (lazily) created upon first usage. Locked to prevent creation of multiple

378

* instances.

379

*/

380

@GuardedBy("mTNSLock")

381

private TestNetworkService mTNS;

382

383

private final Object mTNSLock = new Object();

384

385

private String mCurrentTcpBufferSizes;

386

387

private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames(

388

new Class[] { ConnectivityService.class, NetworkAgent.class, NetworkAgentInfo.class });

389

390

private enum ReapUnvalidatedNetworks {

391

// Tear down networks that have no chance (e.g. even if validated) of becoming

392

// the highest scoring network satisfying a NetworkRequest. This should be passed when

393

// all networks have been rematched against all NetworkRequests.

394

REAP,

395

// Don't reap networks. This should be passed when some networks have not yet been

396

// rematched against all NetworkRequests.

DONT_REAP

}

private enum UnneededFor {

401

LINGER, // Determine whether this network is unneeded and should be lingered.

402

TEARDOWN, // Determine whether this network is unneeded and should be torn down.

403

}

404

405

/**

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

406

* For per-app preferences, requests contain an int to signify which request

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

407

* should have priority. The order is passed to netd which will use it together

408

* with UID ranges to generate the corresponding IP rule. This serves to

409

* direct device-originated data traffic of the specific UIDs to the correct

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

410

* default network for each app.

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

411

* Order ints passed to netd must be in the 0~999 range. Larger values code for

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

412

* a lower priority, {@see NativeUidRangeConfig}

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

413

*

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

414

* Requests that don't code for a per-app preference use PREFERENCE_ORDER_INVALID.

415

* The default request uses PREFERENCE_ORDER_DEFAULT.

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

416

*/

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

417

// Bound for the lowest valid preference order.

418

static final int PREFERENCE_ORDER_LOWEST = 999;

419

// Used when sending to netd to code for "no order".

420

static final int PREFERENCE_ORDER_NONE = 0;

421

// Order for requests that don't code for a per-app preference. As it is

422

// out of the valid range, the corresponding order should be

423

// PREFERENCE_ORDER_NONE when sending to netd.

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

424

@VisibleForTesting

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

425

static final int PREFERENCE_ORDER_INVALID = Integer.MAX_VALUE;

426

// Order for the default internet request. Since this must always have the

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

427

// lowest priority, its value is larger than the largest acceptable value. As

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

428

// it is out of the valid range, the corresponding order should be

429

// PREFERENCE_ORDER_NONE when sending to netd.

430

static final int PREFERENCE_ORDER_DEFAULT = 1000;

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

431

// As a security feature, VPNs have the top priority.

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

432

static final int PREFERENCE_ORDER_VPN = 0; // Netd supports only 0 for VPN.

433

// Order of per-app OEM preference. See {@link #setOemNetworkPreference}.

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

434

@VisibleForTesting

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

435

static final int PREFERENCE_ORDER_OEM = 10;

436

// Order of per-profile preference, such as used by enterprise networks.

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

437

// See {@link #setProfileNetworkPreference}.

438

@VisibleForTesting

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

439

static final int PREFERENCE_ORDER_PROFILE = 20;

440

// Order of user setting to prefer mobile data even when networks with

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

441

// better scores are connected.

442

// See {@link ConnectivitySettingsManager#setMobileDataPreferredUids}

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

443

@VisibleForTesting

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

444

static final int PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED = 30;

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

445

446

/**

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

447

* used internally to clear a wakelock when transitioning

448

* from one net to another. Clear happens when we get a new

449

* network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens

450

* after a timeout if no network is found (typically 1 min).

451

*/

452

private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8;

453

454

/**

455

* used internally to reload global proxy settings

456

*/

457

private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9;

458

459

/**

460

* PAC manager has received new port.

461

*/

462

private static final int EVENT_PROXY_HAS_CHANGED = 16;

463

464

/**

465

* used internally when registering NetworkProviders

466

* obj = NetworkProviderInfo

467

*/

468

private static final int EVENT_REGISTER_NETWORK_PROVIDER = 17;

469

470

/**

471

* used internally when registering NetworkAgents

472

* obj = Messenger

473

*/

474

private static final int EVENT_REGISTER_NETWORK_AGENT = 18;

475

476

/**

477

* used to add a network request

478

* includes a NetworkRequestInfo

479

*/

480

private static final int EVENT_REGISTER_NETWORK_REQUEST = 19;

481

482

/**

483

* indicates a timeout period is over - check if we had a network yet or not

484

* and if not, call the timeout callback (but leave the request live until they

485

* cancel it.

486

* includes a NetworkRequestInfo

487

*/

488

private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20;

489

490

/**

491

* used to add a network listener - no request

492

* includes a NetworkRequestInfo

493

*/

494

private static final int EVENT_REGISTER_NETWORK_LISTENER = 21;

495

496

/**

497

* used to remove a network request, either a listener or a real request

498

* arg1 = UID of caller

499

* obj = NetworkRequest

500

*/

501

private static final int EVENT_RELEASE_NETWORK_REQUEST = 22;

502

503

/**

504

* used internally when registering NetworkProviders

505

* obj = Messenger

506

*/

507

private static final int EVENT_UNREGISTER_NETWORK_PROVIDER = 23;

508

509

/**

510

* used internally to expire a wakelock when transitioning

511

* from one net to another. Expire happens when we fail to find

512

* a new network (typically after 1 minute) -

513

* EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found

514

* a replacement network.

515

*/

516

private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24;

517

518

/**

519

* used to add a network request with a pending intent

520

* obj = NetworkRequestInfo

521

*/

522

private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26;

523

524

/**

525

* used to remove a pending intent and its associated network request.

526

* arg1 = UID of caller

527

* obj = PendingIntent

528

*/

529

private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27;

530

531

/**

532

* used to specify whether a network should be used even if unvalidated.

533

* arg1 = whether to accept the network if it's unvalidated (1 or 0)

534

* arg2 = whether to remember this choice in the future (1 or 0)

535

* obj = network

536

*/

537

private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28;

538

539

/**

540

* used to ask the user to confirm a connection to an unvalidated network.

541

* obj = network

542

*/

543

private static final int EVENT_PROMPT_UNVALIDATED = 29;

544

545

/**

546

* used internally to (re)configure always-on networks.

547

*/

548

private static final int EVENT_CONFIGURE_ALWAYS_ON_NETWORKS = 30;

549

550

/**

551

* used to add a network listener with a pending intent

552

* obj = NetworkRequestInfo

553

*/

554

private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31;

555

556

/**

557

* used to specify whether a network should not be penalized when it becomes unvalidated.

558

*/

559

private static final int EVENT_SET_AVOID_UNVALIDATED = 35;

560

561

/**

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

562

* used to handle reported network connectivity. May trigger revalidation of a network.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

563

*/

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

564

private static final int EVENT_REPORT_NETWORK_CONNECTIVITY = 36;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

565

566

// Handle changes in Private DNS settings.

567

private static final int EVENT_PRIVATE_DNS_SETTINGS_CHANGED = 37;

568

569

// Handle private DNS validation status updates.

570

private static final int EVENT_PRIVATE_DNS_VALIDATION_UPDATE = 38;

571

572

/**

573

* Event for NetworkMonitor/NetworkAgentInfo to inform ConnectivityService that the network has

574

* been tested.

575

* obj = {@link NetworkTestedResults} representing information sent from NetworkMonitor.

576

* data = PersistableBundle of extras passed from NetworkMonitor. If {@link

577

* NetworkMonitorCallbacks#notifyNetworkTested} is called, this will be null.

578

*/

579

private static final int EVENT_NETWORK_TESTED = 41;

580

581

/**

582

* Event for NetworkMonitor/NetworkAgentInfo to inform ConnectivityService that the private DNS

583

* config was resolved.

584

* obj = PrivateDnsConfig

585

* arg2 = netid

586

*/

587

private static final int EVENT_PRIVATE_DNS_CONFIG_RESOLVED = 42;

588

589

/**

590

* Request ConnectivityService display provisioning notification.

591

* arg1 = Whether to make the notification visible.

592

* arg2 = NetID.

593

* obj = Intent to be launched when notification selected by user, null if !arg1.

594

*/

595

private static final int EVENT_PROVISIONING_NOTIFICATION = 43;

596

597

/**

598

* Used to specify whether a network should be used even if connectivity is partial.

599

* arg1 = whether to accept the network if its connectivity is partial (1 for true or 0 for

600

* false)

601

* arg2 = whether to remember this choice in the future (1 for true or 0 for false)

602

* obj = network

603

*/

604

private static final int EVENT_SET_ACCEPT_PARTIAL_CONNECTIVITY = 44;

605

606

/**

607

* Event for NetworkMonitor to inform ConnectivityService that the probe status has changed.

608

* Both of the arguments are bitmasks, and the value of bits come from

609

* INetworkMonitor.NETWORK_VALIDATION_PROBE_*.

610

* arg1 = A bitmask to describe which probes are completed.

611

* arg2 = A bitmask to describe which probes are successful.

612

*/

613

public static final int EVENT_PROBE_STATUS_CHANGED = 45;

614

615

/**

616

* Event for NetworkMonitor to inform ConnectivityService that captive portal data has changed.

617

* arg1 = unused

618

* arg2 = netId

619

* obj = captive portal data

620

*/

621

private static final int EVENT_CAPPORT_DATA_CHANGED = 46;

622

623

/**

624

* Used by setRequireVpnForUids.

625

* arg1 = whether the specified UID ranges are required to use a VPN.

626

* obj = Array of UidRange objects.

627

*/

628

private static final int EVENT_SET_REQUIRE_VPN_FOR_UIDS = 47;

629

630

/**

631

* Used internally when setting the default networks for OemNetworkPreferences.

632

* obj = Pair<OemNetworkPreferences, listener>

633

*/

634

private static final int EVENT_SET_OEM_NETWORK_PREFERENCE = 48;

635

636

/**

637

* Used to indicate the system default network becomes active.

638

*/

639

private static final int EVENT_REPORT_NETWORK_ACTIVITY = 49;

640

641

/**

642

* Used internally when setting a network preference for a user profile.

643

* obj = Pair<ProfileNetworkPreference, Listener>

644

*/

645

private static final int EVENT_SET_PROFILE_NETWORK_PREFERENCE = 50;

646

647

/**

648

* Event to specify that reasons for why an uid is blocked changed.

649

* arg1 = uid

650

* arg2 = blockedReasons

651

*/

652

private static final int EVENT_UID_BLOCKED_REASON_CHANGED = 51;

653

654

/**

655

* Event to register a new network offer

656

* obj = NetworkOffer

657

*/

658

private static final int EVENT_REGISTER_NETWORK_OFFER = 52;

659

660

/**

661

* Event to unregister an existing network offer

662

* obj = INetworkOfferCallback

663

*/

664

private static final int EVENT_UNREGISTER_NETWORK_OFFER = 53;

665

666

/**

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

667

* Used internally when MOBILE_DATA_PREFERRED_UIDS setting changed.

668

*/

669

private static final int EVENT_MOBILE_DATA_PREFERRED_UIDS_CHANGED = 54;

670

671

/**

Chiachang Wang

2021-06-17 22:11:30 +0800

[diff] [blame]

672

* Event to set temporary allow bad wifi within a limited time to override

673

* {@code config_networkAvoidBadWifi}.

674

*/

675

private static final int EVENT_SET_TEST_ALLOW_BAD_WIFI_UNTIL = 55;

676

677

/**

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

678

* Argument for {@link #EVENT_PROVISIONING_NOTIFICATION} to indicate that the notification

679

* should be shown.

680

*/

681

private static final int PROVISIONING_NOTIFICATION_SHOW = 1;

682

683

/**

684

* Argument for {@link #EVENT_PROVISIONING_NOTIFICATION} to indicate that the notification

685

* should be hidden.

686

*/

687

private static final int PROVISIONING_NOTIFICATION_HIDE = 0;

688

Chiachang Wang

2021-06-17 22:11:30 +0800

[diff] [blame]

689

/**

690

* The maximum alive time to allow bad wifi configuration for testing.

691

*/

692

private static final long MAX_TEST_ALLOW_BAD_WIFI_UNTIL_MS = 5 * 60 * 1000L;

693

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

694

private static String eventName(int what) {

695

return sMagicDecoderRing.get(what, Integer.toString(what));

696

}

697

698

private static IDnsResolver getDnsResolver(Context context) {

699

final DnsResolverServiceManager dsm = context.getSystemService(

700

DnsResolverServiceManager.class);

701

return IDnsResolver.Stub.asInterface(dsm.getService());

702

}

703

704

/** Handler thread used for all of the handlers below. */

705

@VisibleForTesting

706

protected final HandlerThread mHandlerThread;

707

/** Handler used for internal events. */

708

final private InternalHandler mHandler;

709

/** Handler used for incoming {@link NetworkStateTracker} events. */

710

final private NetworkStateTrackerHandler mTrackerHandler;

711

/** Handler used for processing {@link android.net.ConnectivityDiagnosticsManager} events */

712

@VisibleForTesting

713

final ConnectivityDiagnosticsHandler mConnectivityDiagnosticsHandler;

714

715

private final DnsManager mDnsManager;

716

private final NetworkRanker mNetworkRanker;

717

718

private boolean mSystemReady;

719

private Intent mInitialBroadcast;

720

721

private PowerManager.WakeLock mNetTransitionWakeLock;

722

private final PowerManager.WakeLock mPendingIntentWakeLock;

723

724

// A helper object to track the current default HTTP proxy. ConnectivityService needs to tell

725

// the world when it changes.

726

@VisibleForTesting

727

protected final ProxyTracker mProxyTracker;

728

729

final private SettingsObserver mSettingsObserver;

730

731

private UserManager mUserManager;

732

733

// the set of network types that can only be enabled by system/sig apps

734

private List<Integer> mProtectedNetworks;

735

736

private Set<String> mWolSupportedInterfaces;

737

738

private final TelephonyManager mTelephonyManager;

739

private final AppOpsManager mAppOpsManager;

740

741

private final LocationPermissionChecker mLocationPermissionChecker;

742

743

private KeepaliveTracker mKeepaliveTracker;

744

private QosCallbackTracker mQosCallbackTracker;

745

private NetworkNotificationManager mNotifier;

746

private LingerMonitor mLingerMonitor;

747

748

// sequence number of NetworkRequests

749

private int mNextNetworkRequestId = NetworkRequest.FIRST_REQUEST_ID;

750

751

// Sequence number for NetworkProvider IDs.

752

private final AtomicInteger mNextNetworkProviderId = new AtomicInteger(

753

NetworkProvider.FIRST_PROVIDER_ID);

754

755

// NetworkRequest activity String log entries.

756

private static final int MAX_NETWORK_REQUEST_LOGS = 20;

757

private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS);

758

759

// NetworkInfo blocked and unblocked String log entries

760

private static final int MAX_NETWORK_INFO_LOGS = 40;

761

private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS);

762

763

private static final int MAX_WAKELOCK_LOGS = 20;

764

private final LocalLog mWakelockLogs = new LocalLog(MAX_WAKELOCK_LOGS);

765

private int mTotalWakelockAcquisitions = 0;

766

private int mTotalWakelockReleases = 0;

767

private long mTotalWakelockDurationMs = 0;

768

private long mMaxWakelockDurationMs = 0;

769

private long mLastWakeLockAcquireTimestamp = 0;

770

771

private final IpConnectivityLog mMetricsLog;

772

773

@GuardedBy("mBandwidthRequests")

774

private final SparseArray<Integer> mBandwidthRequests = new SparseArray(10);

775

776

@VisibleForTesting

777

final MultinetworkPolicyTracker mMultinetworkPolicyTracker;

778

779

@VisibleForTesting

780

final Map<IBinder, ConnectivityDiagnosticsCallbackInfo> mConnectivityDiagnosticsCallbacks =

new HashMap<>();

/**

* Implements support for the legacy "one network per network type" model.

785

*

786

* We used to have a static array of NetworkStateTrackers, one for each

787

* network type, but that doesn't work any more now that we can have,

788

* for example, more that one wifi network. This class stores all the

789

* NetworkAgentInfo objects that support a given type, but the legacy

790

* API will only see the first one.

791

*

792

* It serves two main purposes:

793

*

794

* 1. Provide information about "the network for a given type" (since this

795

* API only supports one).

796

* 2. Send legacy connectivity change broadcasts. Broadcasts are sent if

797

* the first network for a given type changes, or if the default network

* changes.

*/

@VisibleForTesting

static class LegacyTypeTracker {

802

803

private static final boolean DBG = true;

804

private static final boolean VDBG = false;

805

806

/**

807

* Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS).

808

* Each list holds references to all NetworkAgentInfos that are used to

809

* satisfy requests for that network type.

810

*

811

* This array is built out at startup such that an unsupported network

812

* doesn't get an ArrayList instance, making this a tristate:

813

* unsupported, supported but not active and active.

814

*

815

* The actual lists are populated when we scan the network types that

816

* are supported on this device.

817

*

818

* Threading model:

819

* - addSupportedType() is only called in the constructor

820

* - add(), update(), remove() are only called from the ConnectivityService handler thread.

821

* They are therefore not thread-safe with respect to each other.

822

* - getNetworkForType() can be called at any time on binder threads. It is synchronized

823

* on mTypeLists to be thread-safe with respect to a concurrent remove call.

824

* - getRestoreTimerForType(type) is also synchronized on mTypeLists.

825

* - dump is thread-safe with respect to concurrent add and remove calls.

826

*/

827

private final ArrayList<NetworkAgentInfo> mTypeLists[];

828

@NonNull

829

private final ConnectivityService mService;

830

831

// Restore timers for requestNetworkForFeature (network type -> timer in ms). Types without

832

// an entry have no timer (equivalent to -1). Lazily loaded.

833

@NonNull

834

private ArrayMap<Integer, Integer> mRestoreTimers = new ArrayMap<>();

835

836

LegacyTypeTracker(@NonNull ConnectivityService service) {

837

mService = service;

838

mTypeLists = new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1];

839

}

840

841

public void loadSupportedTypes(@NonNull Context ctx, @NonNull TelephonyManager tm) {

842

final PackageManager pm = ctx.getPackageManager();

843

if (pm.hasSystemFeature(FEATURE_WIFI)) {

844

addSupportedType(TYPE_WIFI);

845

}

846

if (pm.hasSystemFeature(FEATURE_WIFI_DIRECT)) {

847

addSupportedType(TYPE_WIFI_P2P);

848

}

849

if (tm.isDataCapable()) {

850

// Telephony does not have granular support for these types: they are either all

851

// supported, or none is supported

852

addSupportedType(TYPE_MOBILE);

853

addSupportedType(TYPE_MOBILE_MMS);

854

addSupportedType(TYPE_MOBILE_SUPL);

855

addSupportedType(TYPE_MOBILE_DUN);

856

addSupportedType(TYPE_MOBILE_HIPRI);

857

addSupportedType(TYPE_MOBILE_FOTA);

858

addSupportedType(TYPE_MOBILE_IMS);

859

addSupportedType(TYPE_MOBILE_CBS);

860

addSupportedType(TYPE_MOBILE_IA);

861

addSupportedType(TYPE_MOBILE_EMERGENCY);

862

}

863

if (pm.hasSystemFeature(FEATURE_BLUETOOTH)) {

864

addSupportedType(TYPE_BLUETOOTH);

865

}

866

if (pm.hasSystemFeature(FEATURE_WATCH)) {

867

// TYPE_PROXY is only used on Wear

868

addSupportedType(TYPE_PROXY);

869

}

870

// Ethernet is often not specified in the configs, although many devices can use it via

871

// USB host adapters. Add it as long as the ethernet service is here.

872

if (ctx.getSystemService(Context.ETHERNET_SERVICE) != null) {

873

addSupportedType(TYPE_ETHERNET);

874

}

875

876

// Always add TYPE_VPN as a supported type

877

addSupportedType(TYPE_VPN);

878

}

879

880

private void addSupportedType(int type) {

881

if (mTypeLists[type] != null) {

882

throw new IllegalStateException(

883

"legacy list for type " + type + "already initialized");

884

}

885

mTypeLists[type] = new ArrayList<>();

886

}

887

888

public boolean isTypeSupported(int type) {

889

return isNetworkTypeValid(type) && mTypeLists[type] != null;

890

}

891

892

public NetworkAgentInfo getNetworkForType(int type) {

893

synchronized (mTypeLists) {

894

if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) {

895

return mTypeLists[type].get(0);

}

}

return null;

}

public int getRestoreTimerForType(int type) {

902

synchronized (mTypeLists) {

903

if (mRestoreTimers == null) {

904

mRestoreTimers = loadRestoreTimers();

905

}

906

return mRestoreTimers.getOrDefault(type, -1);

}

}

private ArrayMap<Integer, Integer> loadRestoreTimers() {

911

final String[] configs = mService.mResources.get().getStringArray(

912

R.array.config_legacy_networktype_restore_timers);

913

final ArrayMap<Integer, Integer> ret = new ArrayMap<>(configs.length);

914

for (final String config : configs) {

915

final String[] splits = TextUtils.split(config, ",");

916

if (splits.length != 2) {

917

logwtf("Invalid restore timer token count: " + config);

continue;

}

try {

ret.put(Integer.parseInt(splits[0]), Integer.parseInt(splits[1]));

922

} catch (NumberFormatException e) {

923

logwtf("Invalid restore timer number format: " + config, e);

}

}

return ret;

}

private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type,

930

boolean isDefaultNetwork) {

931

if (DBG) {

932

log("Sending " + state

933

+ " broadcast for type " + type + " " + nai.toShortString()

934

+ " isDefaultNetwork=" + isDefaultNetwork);

}

}

// When a lockdown VPN connects, send another CONNECTED broadcast for the underlying

939

// network type, to preserve previous behaviour.

940

private void maybeSendLegacyLockdownBroadcast(@NonNull NetworkAgentInfo vpnNai) {

941

if (vpnNai != mService.getLegacyLockdownNai()) return;

942

943

if (vpnNai.declaredUnderlyingNetworks == null

944

|| vpnNai.declaredUnderlyingNetworks.length != 1) {

945

Log.wtf(TAG, "Legacy lockdown VPN must have exactly one underlying network: "

946

+ Arrays.toString(vpnNai.declaredUnderlyingNetworks));

947

return;

948

}

949

final NetworkAgentInfo underlyingNai = mService.getNetworkAgentInfoForNetwork(

950

vpnNai.declaredUnderlyingNetworks[0]);

951

if (underlyingNai == null) return;

952

953

final int type = underlyingNai.networkInfo.getType();

954

final DetailedState state = DetailedState.CONNECTED;

955

maybeLogBroadcast(underlyingNai, state, type, true /* isDefaultNetwork */);

956

mService.sendLegacyNetworkBroadcast(underlyingNai, state, type);

957

}

958

959

/** Adds the given network to the specified legacy type list. */

960

public void add(int type, NetworkAgentInfo nai) {

961

if (!isTypeSupported(type)) {

962

return; // Invalid network type.

963

}

964

if (VDBG) log("Adding agent " + nai + " for legacy network type " + type);

965

966

ArrayList<NetworkAgentInfo> list = mTypeLists[type];

967

if (list.contains(nai)) {

968

return;

969

}

970

synchronized (mTypeLists) {

list.add(nai);

}

// Send a broadcast if this is the first network of its type or if it's the default.

975

final boolean isDefaultNetwork = mService.isDefaultNetwork(nai);

976

977

// If a legacy lockdown VPN is active, override the NetworkInfo state in all broadcasts

978

// to preserve previous behaviour.

979

final DetailedState state = mService.getLegacyLockdownState(DetailedState.CONNECTED);

980

if ((list.size() == 1) || isDefaultNetwork) {

981

maybeLogBroadcast(nai, state, type, isDefaultNetwork);

982

mService.sendLegacyNetworkBroadcast(nai, state, type);

983

}

984

985

if (type == TYPE_VPN && state == DetailedState.CONNECTED) {

986

maybeSendLegacyLockdownBroadcast(nai);

}

}

/** Removes the given network from the specified legacy type list. */

991

public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) {

992

ArrayList<NetworkAgentInfo> list = mTypeLists[type];

993

if (list == null || list.isEmpty()) {

994

return;

995

}

996

final boolean wasFirstNetwork = list.get(0).equals(nai);

997

998

synchronized (mTypeLists) {

999

if (!list.remove(nai)) {

return;

}

}

if (wasFirstNetwork || wasDefault) {

1005

maybeLogBroadcast(nai, DetailedState.DISCONNECTED, type, wasDefault);

1006

mService.sendLegacyNetworkBroadcast(nai, DetailedState.DISCONNECTED, type);

1007

}

1008

1009

if (!list.isEmpty() && wasFirstNetwork) {

1010

if (DBG) log("Other network available for type " + type +

1011

", sending connected broadcast");

1012

final NetworkAgentInfo replacement = list.get(0);

1013

maybeLogBroadcast(replacement, DetailedState.CONNECTED, type,

1014

mService.isDefaultNetwork(replacement));

1015

mService.sendLegacyNetworkBroadcast(replacement, DetailedState.CONNECTED, type);

}

}

/** Removes the given network from all legacy type lists. */

1020

public void remove(NetworkAgentInfo nai, boolean wasDefault) {

1021

if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault);

1022

for (int type = 0; type < mTypeLists.length; type++) {

1023

remove(type, nai, wasDefault);

}

}

// send out another legacy broadcast - currently only used for suspend/unsuspend

1028

// toggle

1029

public void update(NetworkAgentInfo nai) {

1030

final boolean isDefault = mService.isDefaultNetwork(nai);

1031

final DetailedState state = nai.networkInfo.getDetailedState();

1032

for (int type = 0; type < mTypeLists.length; type++) {

1033

final ArrayList<NetworkAgentInfo> list = mTypeLists[type];

1034

final boolean contains = (list != null && list.contains(nai));

1035

final boolean isFirst = contains && (nai == list.get(0));

1036

if (isFirst || contains && isDefault) {

1037

maybeLogBroadcast(nai, state, type, isDefault);

1038

mService.sendLegacyNetworkBroadcast(nai, state, type);

}

}

}

public void dump(IndentingPrintWriter pw) {

1044

pw.println("mLegacyTypeTracker:");

1045

pw.increaseIndent();

1046

pw.print("Supported types:");

1047

for (int type = 0; type < mTypeLists.length; type++) {

1048

if (mTypeLists[type] != null) pw.print(" " + type);

1049

}

1050

pw.println();

1051

pw.println("Current state:");

1052

pw.increaseIndent();

1053

synchronized (mTypeLists) {

1054

for (int type = 0; type < mTypeLists.length; type++) {

1055

if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue;

1056

for (NetworkAgentInfo nai : mTypeLists[type]) {

1057

pw.println(type + " " + nai.toShortString());

}

}

}

pw.decreaseIndent();

pw.decreaseIndent();

pw.println();

}

}

private final LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(this);

1067

1068

final LocalPriorityDump mPriorityDumper = new LocalPriorityDump();

1069

/**

1070

* Helper class which parses out priority arguments and dumps sections according to their

1071

* priority. If priority arguments are omitted, function calls the legacy dump command.

1072

*/

1073

private class LocalPriorityDump {

1074

private static final String PRIORITY_ARG = "--dump-priority";

1075

private static final String PRIORITY_ARG_HIGH = "HIGH";

1076

private static final String PRIORITY_ARG_NORMAL = "NORMAL";

1077

1078

LocalPriorityDump() {}

1079

1080

private void dumpHigh(FileDescriptor fd, PrintWriter pw) {

1081

doDump(fd, pw, new String[] {DIAG_ARG});

1082

doDump(fd, pw, new String[] {SHORT_ARG});

1083

}

1084

1085

private void dumpNormal(FileDescriptor fd, PrintWriter pw, String[] args) {

1086

doDump(fd, pw, args);

1087

}

1088

1089

public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {

1090

if (args == null) {

1091

dumpNormal(fd, pw, args);

return;

}

String priority = null;

1096

for (int argIndex = 0; argIndex < args.length; argIndex++) {

1097

if (args[argIndex].equals(PRIORITY_ARG) && argIndex + 1 < args.length) {

1098

argIndex++;

1099

priority = args[argIndex];

}

}

if (PRIORITY_ARG_HIGH.equals(priority)) {

1104

dumpHigh(fd, pw);

1105

} else if (PRIORITY_ARG_NORMAL.equals(priority)) {

1106

dumpNormal(fd, pw, args);

1107

} else {

1108

// ConnectivityService publishes binder service using publishBinderService() with

1109

// no priority assigned will be treated as NORMAL priority. Dumpsys does not send

Chiachang Wang

12d32a6

2021-05-17 16:57:15 +0800

[diff] [blame]

1110

// "--dump-priority" arguments to the service. Thus, dump NORMAL only to align the

1111

// legacy output for dumpsys connectivity.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1112

// TODO: Integrate into signal dump.

1113

dumpNormal(fd, pw, args);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

}

/**

* Keeps track of the number of requests made under different uids.

1120

*/

1121

public static class PerUidCounter {

1122

private final int mMaxCountPerUid;

1123

1124

// Map from UID to number of NetworkRequests that UID has filed.

1125

@VisibleForTesting

1126

@GuardedBy("mUidToNetworkRequestCount")

1127

final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray();

/**

* Constructor

*

* @param maxCountPerUid the maximum count per uid allowed

1133

*/

1134

public PerUidCounter(final int maxCountPerUid) {

1135

mMaxCountPerUid = maxCountPerUid;

}

/**

* Increments the request count of the given uid. Throws an exception if the number

1140

* of open requests for the uid exceeds the value of maxCounterPerUid which is the value

1141

* passed into the constructor. see: {@link #PerUidCounter(int)}.

1142

*

1143

* @throws ServiceSpecificException with

1144

* {@link ConnectivityManager.Errors.TOO_MANY_REQUESTS} if the number of requests for

1145

* the uid exceed the allowed number.

1146

*

1147

* @param uid the uid that the request was made under

1148

*/

1149

public void incrementCountOrThrow(final int uid) {

1150

synchronized (mUidToNetworkRequestCount) {

1151

incrementCountOrThrow(uid, 1 /* numToIncrement */);

}

}

private void incrementCountOrThrow(final int uid, final int numToIncrement) {

1156

final int newRequestCount =

1157

mUidToNetworkRequestCount.get(uid, 0) + numToIncrement;

1158

if (newRequestCount >= mMaxCountPerUid) {

1159

throw new ServiceSpecificException(

1160

ConnectivityManager.Errors.TOO_MANY_REQUESTS);

1161

}

1162

mUidToNetworkRequestCount.put(uid, newRequestCount);

}

/**

* Decrements the request count of the given uid.

1167

*

1168

* @param uid the uid that the request was made under

1169

*/

1170

public void decrementCount(final int uid) {

1171

synchronized (mUidToNetworkRequestCount) {

1172

decrementCount(uid, 1 /* numToDecrement */);

}

}

private void decrementCount(final int uid, final int numToDecrement) {

1177

final int newRequestCount =

1178

mUidToNetworkRequestCount.get(uid, 0) - numToDecrement;

1179

if (newRequestCount < 0) {

1180

logwtf("BUG: too small request count " + newRequestCount + " for UID " + uid);

1181

} else if (newRequestCount == 0) {

1182

mUidToNetworkRequestCount.delete(uid);

1183

} else {

1184

mUidToNetworkRequestCount.put(uid, newRequestCount);

}

}

/**

* Used to adjust the request counter for the per-app API flows. Directly adjusting the

1190

* counter is not ideal however in the per-app flows, the nris can't be removed until they

1191

* are used to create the new nris upon set. Therefore the request count limit can be

1192

* artificially hit. This method is used as a workaround for this particular case so that

1193

* the request counts are accounted for correctly.

1194

* @param uid the uid to adjust counts for

1195

* @param numOfNewRequests the new request count to account for

1196

* @param r the runnable to execute

1197

*/

1198

public void transact(final int uid, final int numOfNewRequests, @NonNull final Runnable r) {

1199

// This should only be used on the handler thread as per all current and foreseen

1200

// use-cases. ensureRunningOnConnectivityServiceThread() can't be used because there is

1201

// no ref to the outer ConnectivityService.

1202

synchronized (mUidToNetworkRequestCount) {

1203

final int reqCountOverage = getCallingUidRequestCountOverage(uid, numOfNewRequests);

1204

decrementCount(uid, reqCountOverage);

1205

r.run();

1206

incrementCountOrThrow(uid, reqCountOverage);

}

}

private int getCallingUidRequestCountOverage(final int uid, final int numOfNewRequests) {

1211

final int newUidRequestCount = mUidToNetworkRequestCount.get(uid, 0)

1212

+ numOfNewRequests;

1213

return newUidRequestCount >= MAX_NETWORK_REQUESTS_PER_SYSTEM_UID

1214

? newUidRequestCount - (MAX_NETWORK_REQUESTS_PER_SYSTEM_UID - 1) : 0;

}

}

/**

* Dependencies of ConnectivityService, for injection in tests.

1220

*/

1221

@VisibleForTesting

1222

public static class Dependencies {

1223

public int getCallingUid() {

1224

return Binder.getCallingUid();

}

/**

* Get system properties to use in ConnectivityService.

1229

*/

1230

public MockableSystemProperties getSystemProperties() {

1231

return new MockableSystemProperties();

}

/**

* Get the {@link ConnectivityResources} to use in ConnectivityService.

1236

*/

1237

public ConnectivityResources getResources(@NonNull Context ctx) {

1238

return new ConnectivityResources(ctx);

}

/**

* Create a HandlerThread to use in ConnectivityService.

1243

*/

1244

public HandlerThread makeHandlerThread() {

1245

return new HandlerThread("ConnectivityServiceThread");

}

/**

* Get a reference to the ModuleNetworkStackClient.

1250

*/

1251

public NetworkStackClientBase getNetworkStack() {

1252

return ModuleNetworkStackClient.getInstance(null);

}

/**

* @see ProxyTracker

*/

public ProxyTracker makeProxyTracker(@NonNull Context context,

1259

@NonNull Handler connServiceHandler) {

1260

return new ProxyTracker(context, connServiceHandler, EVENT_PROXY_HAS_CHANGED);

}

/**

* @see NetIdManager

*/

public NetIdManager makeNetIdManager() {

1267

return new NetIdManager();

}

/**

* @see NetworkUtils#queryUserAccess(int, int)

1272

*/

1273

public boolean queryUserAccess(int uid, Network network, ConnectivityService cs) {

1274

return cs.queryUserAccess(uid, network);

}

/**

* Gets the UID that owns a socket connection. Needed because opening SOCK_DIAG sockets

1279

* requires CAP_NET_ADMIN, which the unit tests do not have.

1280

*/

1281

public int getConnectionOwnerUid(int protocol, InetSocketAddress local,

1282

InetSocketAddress remote) {

1283

return InetDiagMessage.getConnectionOwnerUid(protocol, local, remote);

}

/**

* @see MultinetworkPolicyTracker

1288

*/

1289

public MultinetworkPolicyTracker makeMultinetworkPolicyTracker(

1290

@NonNull Context c, @NonNull Handler h, @NonNull Runnable r) {

1291

return new MultinetworkPolicyTracker(c, h, r);

}

/**

* @see BatteryStatsManager

1296

*/

1297

public void reportNetworkInterfaceForTransports(Context context, String iface,

1298

int[] transportTypes) {

1299

final BatteryStatsManager batteryStats =

1300

context.getSystemService(BatteryStatsManager.class);

1301

batteryStats.reportNetworkInterfaceForTransports(iface, transportTypes);

1302

}

1303

1304

public boolean getCellular464XlatEnabled() {

1305

return NetworkProperties.isCellular464XlatEnabled().orElse(true);

1306

}

Remi NGUYEN VAN

18a979f

2021-06-04 18:51:25 +0900

[diff] [blame]

1307

1308

/**

1309

* @see PendingIntent#intentFilterEquals

1310

*/

1311

public boolean intentFilterEquals(PendingIntent a, PendingIntent b) {

1312

return a.intentFilterEquals(b);

}

/**

* @see LocationPermissionChecker

1317

*/

1318

public LocationPermissionChecker makeLocationPermissionChecker(Context context) {

1319

return new LocationPermissionChecker(context);

1320

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1321

}

1322

1323

public ConnectivityService(Context context) {

1324

this(context, getDnsResolver(context), new IpConnectivityLog(),

1325

INetd.Stub.asInterface((IBinder) context.getSystemService(Context.NETD_SERVICE)),

new Dependencies());

}

@VisibleForTesting

protected ConnectivityService(Context context, IDnsResolver dnsresolver,

1331

IpConnectivityLog logger, INetd netd, Dependencies deps) {

1332

if (DBG) log("ConnectivityService starting up");

1333

1334

mDeps = Objects.requireNonNull(deps, "missing Dependencies");

1335

mSystemProperties = mDeps.getSystemProperties();

1336

mNetIdManager = mDeps.makeNetIdManager();

1337

mContext = Objects.requireNonNull(context, "missing Context");

1338

mResources = deps.getResources(mContext);

1339

mNetworkRequestCounter = new PerUidCounter(MAX_NETWORK_REQUESTS_PER_UID);

1340

mSystemNetworkRequestCounter = new PerUidCounter(MAX_NETWORK_REQUESTS_PER_SYSTEM_UID);

1341

1342

mMetricsLog = logger;

1343

mNetworkRanker = new NetworkRanker();

1344

final NetworkRequest defaultInternetRequest = createDefaultRequest();

1345

mDefaultRequest = new NetworkRequestInfo(

1346

Process.myUid(), defaultInternetRequest, null,

1347

new Binder(), NetworkCallback.FLAG_INCLUDE_LOCATION_INFO,

1348

null /* attributionTags */);

1349

mNetworkRequests.put(defaultInternetRequest, mDefaultRequest);

1350

mDefaultNetworkRequests.add(mDefaultRequest);

1351

mNetworkRequestInfoLogs.log("REGISTER " + mDefaultRequest);

1352

1353

mDefaultMobileDataRequest = createDefaultInternetRequestForTransport(

1354

NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST);

1355

1356

// The default WiFi request is a background request so that apps using WiFi are

1357

// migrated to a better network (typically ethernet) when one comes up, instead

1358

// of staying on WiFi forever.

1359

mDefaultWifiRequest = createDefaultInternetRequestForTransport(

1360

NetworkCapabilities.TRANSPORT_WIFI, NetworkRequest.Type.BACKGROUND_REQUEST);

1361

1362

mDefaultVehicleRequest = createAlwaysOnRequestForCapability(

1363

NetworkCapabilities.NET_CAPABILITY_VEHICLE_INTERNAL,

1364

NetworkRequest.Type.BACKGROUND_REQUEST);

1365

1366

mHandlerThread = mDeps.makeHandlerThread();

1367

mHandlerThread.start();

1368

mHandler = new InternalHandler(mHandlerThread.getLooper());

1369

mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper());

1370

mConnectivityDiagnosticsHandler =

1371

new ConnectivityDiagnosticsHandler(mHandlerThread.getLooper());

1372

1373

mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(),

1374

ConnectivitySettingsManager.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000);

1375

1376

mLingerDelayMs = mSystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS);

1377

// TODO: Consider making the timer customizable.

1378

mNascentDelayMs = DEFAULT_NASCENT_DELAY_MS;

1379

1380

mStatsManager = mContext.getSystemService(NetworkStatsManager.class);

1381

mPolicyManager = mContext.getSystemService(NetworkPolicyManager.class);

1382

mDnsResolver = Objects.requireNonNull(dnsresolver, "missing IDnsResolver");

1383

mProxyTracker = mDeps.makeProxyTracker(mContext, mHandler);

1384

1385

mNetd = netd;

1386

mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);

1387

mAppOpsManager = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE);

Remi NGUYEN VAN

18a979f

2021-06-04 18:51:25 +0900

[diff] [blame]

1388

mLocationPermissionChecker = mDeps.makeLocationPermissionChecker(mContext);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1389

1390

// To ensure uid state is synchronized with Network Policy, register for

1391

// NetworkPolicyManagerService events must happen prior to NetworkPolicyManagerService

1392

// reading existing policy from disk.

1393

mPolicyManager.registerNetworkPolicyCallback(null, mPolicyCallback);

1394

1395

final PowerManager powerManager = (PowerManager) context.getSystemService(

1396

Context.POWER_SERVICE);

1397

mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);

1398

mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);

1399

1400

mLegacyTypeTracker.loadSupportedTypes(mContext, mTelephonyManager);

1401

mProtectedNetworks = new ArrayList<>();

1402

int[] protectedNetworks = mResources.get().getIntArray(R.array.config_protectedNetworks);

1403

for (int p : protectedNetworks) {

1404

if (mLegacyTypeTracker.isTypeSupported(p) && !mProtectedNetworks.contains(p)) {

1405

mProtectedNetworks.add(p);

1406

} else {

1407

if (DBG) loge("Ignoring protectedNetwork " + p);

}

}

mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);

1412

1413

mPermissionMonitor = new PermissionMonitor(mContext, mNetd);

1414

1415

mUserAllContext = mContext.createContextAsUser(UserHandle.ALL, 0 /* flags */);

1416

// Listen for user add/removes to inform PermissionMonitor.

1417

// Should run on mHandler to avoid any races.

1418

final IntentFilter userIntentFilter = new IntentFilter();

1419

userIntentFilter.addAction(Intent.ACTION_USER_ADDED);

1420

userIntentFilter.addAction(Intent.ACTION_USER_REMOVED);

1421

mUserAllContext.registerReceiver(mUserIntentReceiver, userIntentFilter,

1422

null /* broadcastPermission */, mHandler);

1423

1424

// Listen to package add/removes for netd

1425

final IntentFilter packageIntentFilter = new IntentFilter();

1426

packageIntentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);

1427

packageIntentFilter.addAction(Intent.ACTION_PACKAGE_REMOVED);

1428

packageIntentFilter.addAction(Intent.ACTION_PACKAGE_REPLACED);

1429

packageIntentFilter.addDataScheme("package");

1430

mUserAllContext.registerReceiver(mPackageIntentReceiver, packageIntentFilter,

1431

null /* broadcastPermission */, mHandler);

1432

1433

mNetworkActivityTracker = new LegacyNetworkActivityTracker(mContext, mHandler, mNetd);

1434

1435

mNetdCallback = new NetdCallback();

1436

try {

1437

mNetd.registerUnsolicitedEventListener(mNetdCallback);

1438

} catch (RemoteException | ServiceSpecificException e) {

1439

loge("Error registering event listener :" + e);

1440

}

1441

1442

mSettingsObserver = new SettingsObserver(mContext, mHandler);

1443

registerSettingsCallbacks();

1444

1445

mKeepaliveTracker = new KeepaliveTracker(mContext, mHandler);

1446

mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager);

1447

mQosCallbackTracker = new QosCallbackTracker(mHandler, mNetworkRequestCounter);

1448

1449

final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(),

1450

ConnectivitySettingsManager.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT,

1451

LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT);

1452

final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(),

1453

ConnectivitySettingsManager.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS,

1454

LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS);

1455

mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit);

1456

1457

mMultinetworkPolicyTracker = mDeps.makeMultinetworkPolicyTracker(

1458

mContext, mHandler, () -> updateAvoidBadWifi());

1459

mMultinetworkPolicyTracker.start();

1460

1461

mDnsManager = new DnsManager(mContext, mDnsResolver);

1462

registerPrivateDnsSettingsCallbacks();

1463

1464

// This NAI is a sentinel used to offer no service to apps that are on a multi-layer

1465

// request that doesn't allow fallback to the default network. It should never be visible

1466

// to apps. As such, it's not in the list of NAIs and doesn't need many of the normal

1467

// arguments like the handler or the DnsResolver.

1468

// TODO : remove this ; it is probably better handled with a sentinel request.

1469

mNoServiceNetwork = new NetworkAgentInfo(null,

Ken Chen

4f612fa

2021-05-14 14:30:43 +0800

[diff] [blame]

1470

new Network(INetd.UNREACHABLE_NET_ID),

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1471

new NetworkInfo(TYPE_NONE, 0, "", ""),

1472

new LinkProperties(), new NetworkCapabilities(),

1473

new NetworkScore.Builder().setLegacyInt(0).build(), mContext, null,

1474

new NetworkAgentConfig(), this, null, null, 0, INVALID_UID,

1475

mLingerDelayMs, mQosCallbackTracker, mDeps);

1476

}

1477

1478

private static NetworkCapabilities createDefaultNetworkCapabilitiesForUid(int uid) {

1479

return createDefaultNetworkCapabilitiesForUidRange(new UidRange(uid, uid));

1480

}

1481

1482

private static NetworkCapabilities createDefaultNetworkCapabilitiesForUidRange(

1483

@NonNull final UidRange uids) {

1484

final NetworkCapabilities netCap = new NetworkCapabilities();

1485

netCap.addCapability(NET_CAPABILITY_INTERNET);

1486

netCap.addCapability(NET_CAPABILITY_NOT_VCN_MANAGED);

1487

netCap.removeCapability(NET_CAPABILITY_NOT_VPN);

1488

netCap.setUids(UidRange.toIntRanges(Collections.singleton(uids)));

return netCap;

}

private NetworkRequest createDefaultRequest() {

1493

return createDefaultInternetRequestForTransport(

1494

TYPE_NONE, NetworkRequest.Type.REQUEST);

1495

}

1496

1497

private NetworkRequest createDefaultInternetRequestForTransport(

1498

int transportType, NetworkRequest.Type type) {

1499

final NetworkCapabilities netCap = new NetworkCapabilities();

1500

netCap.addCapability(NET_CAPABILITY_INTERNET);

1501

netCap.addCapability(NET_CAPABILITY_NOT_VCN_MANAGED);

1502

netCap.setRequestorUidAndPackageName(Process.myUid(), mContext.getPackageName());

1503

if (transportType > TYPE_NONE) {

1504

netCap.addTransportType(transportType);

1505

}

1506

return createNetworkRequest(type, netCap);

1507

}

1508

1509

private NetworkRequest createNetworkRequest(

1510

NetworkRequest.Type type, NetworkCapabilities netCap) {

1511

return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type);

1512

}

1513

1514

private NetworkRequest createAlwaysOnRequestForCapability(int capability,

1515

NetworkRequest.Type type) {

1516

final NetworkCapabilities netCap = new NetworkCapabilities();

1517

netCap.clearAll();

1518

netCap.addCapability(capability);

1519

netCap.setRequestorUidAndPackageName(Process.myUid(), mContext.getPackageName());

1520

return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type);

1521

}

1522

1523

// Used only for testing.

1524

// TODO: Delete this and either:

1525

// 1. Give FakeSettingsProvider the ability to send settings change notifications (requires

1526

// changing ContentResolver to make registerContentObserver non-final).

1527

// 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it

1528

// by subclassing SettingsObserver.

1529

@VisibleForTesting

1530

void updateAlwaysOnNetworks() {

1531

mHandler.sendEmptyMessage(EVENT_CONFIGURE_ALWAYS_ON_NETWORKS);

1532

}

1533

1534

// See FakeSettingsProvider comment above.

1535

@VisibleForTesting

1536

void updatePrivateDnsSettings() {

1537

mHandler.sendEmptyMessage(EVENT_PRIVATE_DNS_SETTINGS_CHANGED);

1538

}

1539

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

1540

@VisibleForTesting

1541

void updateMobileDataPreferredUids() {

1542

mHandler.sendEmptyMessage(EVENT_MOBILE_DATA_PREFERRED_UIDS_CHANGED);

1543

}

1544

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1545

private void handleAlwaysOnNetworkRequest(NetworkRequest networkRequest, int id) {

1546

final boolean enable = mContext.getResources().getBoolean(id);

1547

handleAlwaysOnNetworkRequest(networkRequest, enable);

1548

}

1549

1550

private void handleAlwaysOnNetworkRequest(

1551

NetworkRequest networkRequest, String settingName, boolean defaultValue) {

1552

final boolean enable = toBool(Settings.Global.getInt(

1553

mContext.getContentResolver(), settingName, encodeBool(defaultValue)));

1554

handleAlwaysOnNetworkRequest(networkRequest, enable);

1555

}

1556

1557

private void handleAlwaysOnNetworkRequest(NetworkRequest networkRequest, boolean enable) {

1558

final boolean isEnabled = (mNetworkRequests.get(networkRequest) != null);

1559

if (enable == isEnabled) {

1560

return; // Nothing to do.

}

if (enable) {

handleRegisterNetworkRequest(new NetworkRequestInfo(

1565

Process.myUid(), networkRequest, null, new Binder(),

1566

NetworkCallback.FLAG_INCLUDE_LOCATION_INFO,

1567

null /* attributionTags */));

1568

} else {

1569

handleReleaseNetworkRequest(networkRequest, Process.SYSTEM_UID,

1570

/* callOnUnavailable */ false);

}

}

private void handleConfigureAlwaysOnNetworks() {

1575

handleAlwaysOnNetworkRequest(mDefaultMobileDataRequest,

1576

ConnectivitySettingsManager.MOBILE_DATA_ALWAYS_ON, true /* defaultValue */);

1577

handleAlwaysOnNetworkRequest(mDefaultWifiRequest,

1578

ConnectivitySettingsManager.WIFI_ALWAYS_REQUESTED, false /* defaultValue */);

1579

final boolean vehicleAlwaysRequested = mResources.get().getBoolean(

1580

R.bool.config_vehicleInternalNetworkAlwaysRequested);

Remi NGUYEN VAN

1423347

2021-05-19 12:05:13 +0900

[diff] [blame]

1581

handleAlwaysOnNetworkRequest(mDefaultVehicleRequest, vehicleAlwaysRequested);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1582

}

1583

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

1584

// Note that registering observer for setting do not get initial callback when registering,

paulhu

7ed70a9

2021-05-26 12:22:38 +0800

[diff] [blame]

1585

// callers must fetch the initial value of the setting themselves if needed.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1586

private void registerSettingsCallbacks() {

1587

// Watch for global HTTP proxy changes.

1588

mSettingsObserver.observe(

1589

Settings.Global.getUriFor(Settings.Global.HTTP_PROXY),

1590

EVENT_APPLY_GLOBAL_HTTP_PROXY);

1591

1592

// Watch for whether or not to keep mobile data always on.

1593

mSettingsObserver.observe(

1594

Settings.Global.getUriFor(ConnectivitySettingsManager.MOBILE_DATA_ALWAYS_ON),

1595

EVENT_CONFIGURE_ALWAYS_ON_NETWORKS);

1596

1597

// Watch for whether or not to keep wifi always on.

1598

mSettingsObserver.observe(

1599

Settings.Global.getUriFor(ConnectivitySettingsManager.WIFI_ALWAYS_REQUESTED),

1600

EVENT_CONFIGURE_ALWAYS_ON_NETWORKS);

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

1601

1602

// Watch for mobile data preferred uids changes.

1603

mSettingsObserver.observe(

1604

Settings.Secure.getUriFor(ConnectivitySettingsManager.MOBILE_DATA_PREFERRED_UIDS),

1605

EVENT_MOBILE_DATA_PREFERRED_UIDS_CHANGED);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1606

}

1607

1608

private void registerPrivateDnsSettingsCallbacks() {

1609

for (Uri uri : DnsManager.getPrivateDnsSettingsUris()) {

1610

mSettingsObserver.observe(uri, EVENT_PRIVATE_DNS_SETTINGS_CHANGED);

}

}

private synchronized int nextNetworkRequestId() {

1615

// TODO: Consider handle wrapping and exclude {@link NetworkRequest#REQUEST_ID_NONE} if

1616

// doing that.

1617

return mNextNetworkRequestId++;

}

@VisibleForTesting

protected NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) {

1622

if (network == null) {

1623

return null;

1624

}

1625

return getNetworkAgentInfoForNetId(network.getNetId());

1626

}

1627

1628

private NetworkAgentInfo getNetworkAgentInfoForNetId(int netId) {

1629

synchronized (mNetworkForNetId) {

1630

return mNetworkForNetId.get(netId);

}

}

// TODO: determine what to do when more than one VPN applies to |uid|.

1635

private NetworkAgentInfo getVpnForUid(int uid) {

1636

synchronized (mNetworkForNetId) {

1637

for (int i = 0; i < mNetworkForNetId.size(); i++) {

1638

final NetworkAgentInfo nai = mNetworkForNetId.valueAt(i);

1639

if (nai.isVPN() && nai.everConnected && nai.networkCapabilities.appliesToUid(uid)) {

return nai;

}

}

}

return null;

}

private Network[] getVpnUnderlyingNetworks(int uid) {

1648

if (mLockdownEnabled) return null;

1649

final NetworkAgentInfo nai = getVpnForUid(uid);

1650

if (nai != null) return nai.declaredUnderlyingNetworks;

return null;

}

private NetworkAgentInfo getNetworkAgentInfoForUid(int uid) {

1655

NetworkAgentInfo nai = getDefaultNetworkForUid(uid);

1656

1657

final Network[] networks = getVpnUnderlyingNetworks(uid);

1658

if (networks != null) {

1659

// getUnderlyingNetworks() returns:

1660

// null => there was no VPN, or the VPN didn't specify anything, so we use the default.

1661

// empty array => the VPN explicitly said "no default network".

1662

// non-empty array => the VPN specified one or more default networks; we use the

1663

// first one.

1664

if (networks.length > 0) {

1665

nai = getNetworkAgentInfoForNetwork(networks[0]);

} else {

nai = null;

}

}

return nai;

}

/**

* Check if UID should be blocked from using the specified network.

1675

*/

1676

private boolean isNetworkWithCapabilitiesBlocked(@Nullable final NetworkCapabilities nc,

1677

final int uid, final boolean ignoreBlocked) {

1678

// Networks aren't blocked when ignoring blocked status

if (ignoreBlocked) {

return false;

}

if (isUidBlockedByVpn(uid, mVpnBlockedUidRanges)) return true;

1683

final long ident = Binder.clearCallingIdentity();

1684

try {

1685

final boolean metered = nc == null ? true : nc.isMetered();

1686

return mPolicyManager.isUidNetworkingBlocked(uid, metered);

1687

} finally {

1688

Binder.restoreCallingIdentity(ident);

}

}

private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) {

1693

if (ni == null || !LOGD_BLOCKED_NETWORKINFO) {

1694

return;

1695

}

1696

final boolean blocked;

1697

synchronized (mBlockedAppUids) {

1698

if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) {

1699

blocked = true;

1700

} else if (ni.isConnected() && mBlockedAppUids.remove(uid)) {

blocked = false;

} else {

return;

}

}

String action = blocked ? "BLOCKED" : "UNBLOCKED";

1707

log(String.format("Returning %s NetworkInfo to uid=%d", action, uid));

1708

mNetworkInfoBlockingLogs.log(action + " " + uid);

1709

}

1710

1711

private void maybeLogBlockedStatusChanged(NetworkRequestInfo nri, Network net, int blocked) {

1712

if (nri == null || net == null || !LOGD_BLOCKED_NETWORKINFO) {

1713

return;

1714

}

1715

final String action = (blocked != 0) ? "BLOCKED" : "UNBLOCKED";

1716

final int requestId = nri.getActiveRequest() != null

1717

? nri.getActiveRequest().requestId : nri.mRequests.get(0).requestId;

1718

mNetworkInfoBlockingLogs.log(String.format(

1719

"%s %d(%d) on netId %d: %s", action, nri.mAsUid, requestId, net.getNetId(),

1720

Integer.toHexString(blocked)));

}

/**

* Apply any relevant filters to the specified {@link NetworkInfo} for the given UID. For

1725

* example, this may mark the network as {@link DetailedState#BLOCKED} based

1726

* on {@link #isNetworkWithCapabilitiesBlocked}.

1727

*/

1728

@NonNull

1729

private NetworkInfo filterNetworkInfo(@NonNull NetworkInfo networkInfo, int type,

1730

@NonNull NetworkCapabilities nc, int uid, boolean ignoreBlocked) {

1731

final NetworkInfo filtered = new NetworkInfo(networkInfo);

1732

// Many legacy types (e.g,. TYPE_MOBILE_HIPRI) are not actually a property of the network

1733

// but only exists if an app asks about them or requests them. Ensure the requesting app

1734

// gets the type it asks for.

1735

filtered.setType(type);

1736

if (isNetworkWithCapabilitiesBlocked(nc, uid, ignoreBlocked)) {

1737

filtered.setDetailedState(DetailedState.BLOCKED, null /* reason */,

1738

null /* extraInfo */);

1739

}

1740

filterForLegacyLockdown(filtered);

return filtered;

}

private NetworkInfo getFilteredNetworkInfo(NetworkAgentInfo nai, int uid,

1745

boolean ignoreBlocked) {

1746

return filterNetworkInfo(nai.networkInfo, nai.networkInfo.getType(),

1747

nai.networkCapabilities, uid, ignoreBlocked);

}

/**

* Return NetworkInfo for the active (i.e., connected) network interface.

1752

* It is assumed that at most one network is active at a time. If more

1753

* than one is active, it is indeterminate which will be returned.

1754

* @return the info for the active network, or {@code null} if none is

* active

*/

@Override

public NetworkInfo getActiveNetworkInfo() {

1759

enforceAccessPermission();

1760

final int uid = mDeps.getCallingUid();

1761

final NetworkAgentInfo nai = getNetworkAgentInfoForUid(uid);

1762

if (nai == null) return null;

1763

final NetworkInfo networkInfo = getFilteredNetworkInfo(nai, uid, false);

1764

maybeLogBlockedNetworkInfo(networkInfo, uid);

return networkInfo;

}

@Override

public Network getActiveNetwork() {

1770

enforceAccessPermission();

1771

return getActiveNetworkForUidInternal(mDeps.getCallingUid(), false);

}

@Override

public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) {

1776

PermissionUtils.enforceNetworkStackPermission(mContext);

1777

return getActiveNetworkForUidInternal(uid, ignoreBlocked);

1778

}

1779

1780

private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) {

1781

final NetworkAgentInfo vpnNai = getVpnForUid(uid);

1782

if (vpnNai != null) {

1783

final NetworkCapabilities requiredCaps = createDefaultNetworkCapabilitiesForUid(uid);

1784

if (requiredCaps.satisfiedByNetworkCapabilities(vpnNai.networkCapabilities)) {

1785

return vpnNai.network;

}

}

NetworkAgentInfo nai = getDefaultNetworkForUid(uid);

1790

if (nai == null || isNetworkWithCapabilitiesBlocked(nai.networkCapabilities, uid,

ignoreBlocked)) {

return null;

}

return nai.network;

}

@Override

public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) {

1799

PermissionUtils.enforceNetworkStackPermission(mContext);

1800

final NetworkAgentInfo nai = getNetworkAgentInfoForUid(uid);

1801

if (nai == null) return null;

1802

return getFilteredNetworkInfo(nai, uid, ignoreBlocked);

1803

}

1804

1805

/** Returns a NetworkInfo object for a network that doesn't exist. */

1806

private NetworkInfo makeFakeNetworkInfo(int networkType, int uid) {

1807

final NetworkInfo info = new NetworkInfo(networkType, 0 /* subtype */,

1808

getNetworkTypeName(networkType), "" /* subtypeName */);

1809

info.setIsAvailable(true);

1810

// For compatibility with legacy code, return BLOCKED instead of DISCONNECTED when

1811

// background data is restricted.

1812

final NetworkCapabilities nc = new NetworkCapabilities(); // Metered.

1813

final DetailedState state = isNetworkWithCapabilitiesBlocked(nc, uid, false)

1814

? DetailedState.BLOCKED

1815

: DetailedState.DISCONNECTED;

1816

info.setDetailedState(state, null /* reason */, null /* extraInfo */);

1817

filterForLegacyLockdown(info);

return info;

}

private NetworkInfo getFilteredNetworkInfoForType(int networkType, int uid) {

1822

if (!mLegacyTypeTracker.isTypeSupported(networkType)) {

1823

return null;

1824

}

1825

final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);

1826

if (nai == null) {

1827

return makeFakeNetworkInfo(networkType, uid);

1828

}

1829

return filterNetworkInfo(nai.networkInfo, networkType, nai.networkCapabilities, uid,

false);

}

@Override

public NetworkInfo getNetworkInfo(int networkType) {

1835

enforceAccessPermission();

1836

final int uid = mDeps.getCallingUid();

1837

if (getVpnUnderlyingNetworks(uid) != null) {

1838

// A VPN is active, so we may need to return one of its underlying networks. This

1839

// information is not available in LegacyTypeTracker, so we have to get it from

1840

// getNetworkAgentInfoForUid.

1841

final NetworkAgentInfo nai = getNetworkAgentInfoForUid(uid);

1842

if (nai == null) return null;

1843

final NetworkInfo networkInfo = getFilteredNetworkInfo(nai, uid, false);

1844

if (networkInfo.getType() == networkType) {

return networkInfo;

}

}

return getFilteredNetworkInfoForType(networkType, uid);

}

@Override

public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) {

1853

enforceAccessPermission();

1854

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

1855

if (nai == null) return null;

1856

return getFilteredNetworkInfo(nai, uid, ignoreBlocked);

}

@Override

public NetworkInfo[] getAllNetworkInfo() {

1861

enforceAccessPermission();

1862

final ArrayList<NetworkInfo> result = new ArrayList<>();

1863

for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE;

1864

networkType++) {

1865

NetworkInfo info = getNetworkInfo(networkType);

if (info != null) {

result.add(info);

}

}

return result.toArray(new NetworkInfo[result.size()]);

}

@Override

public Network getNetworkForType(int networkType) {

1875

enforceAccessPermission();

1876

if (!mLegacyTypeTracker.isTypeSupported(networkType)) {

1877

return null;

1878

}

1879

final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);

if (nai == null) {

return null;

}

final int uid = mDeps.getCallingUid();

1884

if (isNetworkWithCapabilitiesBlocked(nai.networkCapabilities, uid, false)) {

return null;

}

return nai.network;

}

@Override

public Network[] getAllNetworks() {

1892

enforceAccessPermission();

1893

synchronized (mNetworkForNetId) {

1894

final Network[] result = new Network[mNetworkForNetId.size()];

1895

for (int i = 0; i < mNetworkForNetId.size(); i++) {

1896

result[i] = mNetworkForNetId.valueAt(i).network;

}

return result;

}

}

@Override

public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(

1904

int userId, String callingPackageName, @Nullable String callingAttributionTag) {

1905

// The basic principle is: if an app's traffic could possibly go over a

1906

// network, without the app doing anything multinetwork-specific,

1907

// (hence, by "default"), then include that network's capabilities in

1908

// the array.

1909

//

1910

// In the normal case, app traffic only goes over the system's default

1911

// network connection, so that's the only network returned.

1912

//

1913

// With a VPN in force, some app traffic may go into the VPN, and thus

1914

// over whatever underlying networks the VPN specifies, while other app

1915

// traffic may go over the system default network (e.g.: a split-tunnel

1916

// VPN, or an app disallowed by the VPN), so the set of networks

1917

// returned includes the VPN's underlying networks and the system

1918

// default.

1919

enforceAccessPermission();

1920

1921

HashMap<Network, NetworkCapabilities> result = new HashMap<>();

1922

1923

for (final NetworkRequestInfo nri : mDefaultNetworkRequests) {

1924

if (!nri.isBeingSatisfied()) {

1925

continue;

1926

}

1927

final NetworkAgentInfo nai = nri.getSatisfier();

1928

final NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai);

1929

if (null != nc

1930

&& nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)

1931

&& !result.containsKey(nai.network)) {

1932

result.put(

1933

nai.network,

1934

createWithLocationInfoSanitizedIfNecessaryWhenParceled(

1935

nc, false /* includeLocationSensitiveInfo */,

1936

getCallingPid(), mDeps.getCallingUid(), callingPackageName,

1937

callingAttributionTag));

}

}

// No need to check mLockdownEnabled. If it's true, getVpnUnderlyingNetworks returns null.

1942

final Network[] networks = getVpnUnderlyingNetworks(mDeps.getCallingUid());

1943

if (null != networks) {

1944

for (final Network network : networks) {

1945

final NetworkCapabilities nc = getNetworkCapabilitiesInternal(network);

if (null != nc) {

result.put(

network,

createWithLocationInfoSanitizedIfNecessaryWhenParceled(

1950

nc,

1951

false /* includeLocationSensitiveInfo */,

1952

getCallingPid(), mDeps.getCallingUid(), callingPackageName,

1953

callingAttributionTag));

}

}

}

NetworkCapabilities[] out = new NetworkCapabilities[result.size()];

1959

out = result.values().toArray(out);

return out;

}

@Override

public boolean isNetworkSupported(int networkType) {

1965

enforceAccessPermission();

1966

return mLegacyTypeTracker.isTypeSupported(networkType);

}

/**

* Return LinkProperties for the active (i.e., connected) default

1971

* network interface for the calling uid.

1972

* @return the ip properties for the active network, or {@code null} if

* none is active

*/

@Override

public LinkProperties getActiveLinkProperties() {

1977

enforceAccessPermission();

1978

final int uid = mDeps.getCallingUid();

1979

NetworkAgentInfo nai = getNetworkAgentInfoForUid(uid);

1980

if (nai == null) return null;

1981

return linkPropertiesRestrictedForCallerPermissions(nai.linkProperties,

1982

Binder.getCallingPid(), uid);

}

@Override

public LinkProperties getLinkPropertiesForType(int networkType) {

1987

enforceAccessPermission();

1988

NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);

1989

final LinkProperties lp = getLinkProperties(nai);

1990

if (lp == null) return null;

1991

return linkPropertiesRestrictedForCallerPermissions(

1992

lp, Binder.getCallingPid(), mDeps.getCallingUid());

1993

}

1994

1995

// TODO - this should be ALL networks

1996

@Override

1997

public LinkProperties getLinkProperties(Network network) {

1998

enforceAccessPermission();

1999

final LinkProperties lp = getLinkProperties(getNetworkAgentInfoForNetwork(network));

2000

if (lp == null) return null;

2001

return linkPropertiesRestrictedForCallerPermissions(

2002

lp, Binder.getCallingPid(), mDeps.getCallingUid());

}

@Nullable

private LinkProperties getLinkProperties(@Nullable NetworkAgentInfo nai) {

if (nai == null) {

return null;

}

synchronized (nai) {

return nai.linkProperties;

}

}

private NetworkCapabilities getNetworkCapabilitiesInternal(Network network) {

2016

return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network));

2017

}

2018

2019

private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) {

2020

if (nai == null) return null;

2021

synchronized (nai) {

2022

return networkCapabilitiesRestrictedForCallerPermissions(

2023

nai.networkCapabilities, Binder.getCallingPid(), mDeps.getCallingUid());

}

}

@Override

public NetworkCapabilities getNetworkCapabilities(Network network, String callingPackageName,

2029

@Nullable String callingAttributionTag) {

2030

mAppOpsManager.checkPackage(mDeps.getCallingUid(), callingPackageName);

2031

enforceAccessPermission();

2032

return createWithLocationInfoSanitizedIfNecessaryWhenParceled(

2033

getNetworkCapabilitiesInternal(network),

2034

false /* includeLocationSensitiveInfo */,

2035

getCallingPid(), mDeps.getCallingUid(), callingPackageName, callingAttributionTag);

}

@VisibleForTesting

NetworkCapabilities networkCapabilitiesRestrictedForCallerPermissions(

2040

NetworkCapabilities nc, int callerPid, int callerUid) {

2041

final NetworkCapabilities newNc = new NetworkCapabilities(nc);

2042

if (!checkSettingsPermission(callerPid, callerUid)) {

newNc.setUids(null);

newNc.setSSID(null);

}

if (newNc.getNetworkSpecifier() != null) {

2047

newNc.setNetworkSpecifier(newNc.getNetworkSpecifier().redact());

2048

}

2049

newNc.setAdministratorUids(new int[0]);

2050

if (!checkAnyPermissionOf(

2051

callerPid, callerUid, android.Manifest.permission.NETWORK_FACTORY)) {

2052

newNc.setSubscriptionIds(Collections.emptySet());

}

return newNc;

}

/**

* Wrapper used to cache the permission check results performed for the corresponding

2060

* app. This avoid performing multiple permission checks for different fields in

2061

* NetworkCapabilities.

2062

* Note: This wrapper does not support any sort of invalidation and thus must not be

2063

* persistent or long-lived. It may only be used for the time necessary to

2064

* compute the redactions required by one particular NetworkCallback or

2065

* synchronous call.

2066

*/

2067

private class RedactionPermissionChecker {

2068

private final int mCallingPid;

2069

private final int mCallingUid;

2070

@NonNull private final String mCallingPackageName;

2071

@Nullable private final String mCallingAttributionTag;

2072

2073

private Boolean mHasLocationPermission = null;

2074

private Boolean mHasLocalMacAddressPermission = null;

2075

private Boolean mHasSettingsPermission = null;

2076

2077

RedactionPermissionChecker(int callingPid, int callingUid,

2078

@NonNull String callingPackageName, @Nullable String callingAttributionTag) {

2079

mCallingPid = callingPid;

2080

mCallingUid = callingUid;

2081

mCallingPackageName = callingPackageName;

2082

mCallingAttributionTag = callingAttributionTag;

2083

}

2084

2085

private boolean hasLocationPermissionInternal() {

2086

final long token = Binder.clearCallingIdentity();

2087

try {

2088

return mLocationPermissionChecker.checkLocationPermission(

2089

mCallingPackageName, mCallingAttributionTag, mCallingUid,

2090

null /* message */);

2091

} finally {

2092

Binder.restoreCallingIdentity(token);

}

}

/**

* Returns whether the app holds location permission or not (might return cached result

2098

* if the permission was already checked before).

2099

*/

2100

public boolean hasLocationPermission() {

2101

if (mHasLocationPermission == null) {

2102

// If there is no cached result, perform the check now.

2103

mHasLocationPermission = hasLocationPermissionInternal();

2104

}

2105

return mHasLocationPermission;

}

/**

* Returns whether the app holds local mac address permission or not (might return cached

2110

* result if the permission was already checked before).

2111

*/

2112

public boolean hasLocalMacAddressPermission() {

2113

if (mHasLocalMacAddressPermission == null) {

2114

// If there is no cached result, perform the check now.

2115

mHasLocalMacAddressPermission =

2116

checkLocalMacAddressPermission(mCallingPid, mCallingUid);

2117

}

2118

return mHasLocalMacAddressPermission;

}

/**

* Returns whether the app holds settings permission or not (might return cached

2123

* result if the permission was already checked before).

2124

*/

2125

public boolean hasSettingsPermission() {

2126

if (mHasSettingsPermission == null) {

2127

// If there is no cached result, perform the check now.

2128

mHasSettingsPermission = checkSettingsPermission(mCallingPid, mCallingUid);

2129

}

2130

return mHasSettingsPermission;

}

}

private static boolean shouldRedact(@NetworkCapabilities.RedactionType long redactions,

2135

@NetworkCapabilities.NetCapability long redaction) {

2136

return (redactions & redaction) != 0;

}

/**

* Use the provided |applicableRedactions| to check the receiving app's

2141

* permissions and clear/set the corresponding bit in the returned bitmask. The bitmask

2142

* returned will be used to ensure the necessary redactions are performed by NetworkCapabilities

2143

* before being sent to the corresponding app.

2144

*/

2145

private @NetworkCapabilities.RedactionType long retrieveRequiredRedactions(

2146

@NetworkCapabilities.RedactionType long applicableRedactions,

2147

@NonNull RedactionPermissionChecker redactionPermissionChecker,

2148

boolean includeLocationSensitiveInfo) {

2149

long redactions = applicableRedactions;

2150

if (shouldRedact(redactions, REDACT_FOR_ACCESS_FINE_LOCATION)) {

2151

if (includeLocationSensitiveInfo

2152

&& redactionPermissionChecker.hasLocationPermission()) {

2153

redactions &= ~REDACT_FOR_ACCESS_FINE_LOCATION;

2154

}

2155

}

2156

if (shouldRedact(redactions, REDACT_FOR_LOCAL_MAC_ADDRESS)) {

2157

if (redactionPermissionChecker.hasLocalMacAddressPermission()) {

2158

redactions &= ~REDACT_FOR_LOCAL_MAC_ADDRESS;

2159

}

2160

}

2161

if (shouldRedact(redactions, REDACT_FOR_NETWORK_SETTINGS)) {

2162

if (redactionPermissionChecker.hasSettingsPermission()) {

2163

redactions &= ~REDACT_FOR_NETWORK_SETTINGS;

}

}

return redactions;

}

@VisibleForTesting

@Nullable

NetworkCapabilities createWithLocationInfoSanitizedIfNecessaryWhenParceled(

2172

@Nullable NetworkCapabilities nc, boolean includeLocationSensitiveInfo,

2173

int callingPid, int callingUid, @NonNull String callingPkgName,

2174

@Nullable String callingAttributionTag) {

if (nc == null) {

return null;

}

// Avoid doing location permission check if the transport info has no location sensitive

2179

// data.

2180

final RedactionPermissionChecker redactionPermissionChecker =

2181

new RedactionPermissionChecker(callingPid, callingUid, callingPkgName,

2182

callingAttributionTag);

2183

final long redactions = retrieveRequiredRedactions(

2184

nc.getApplicableRedactions(), redactionPermissionChecker,

2185

includeLocationSensitiveInfo);

2186

final NetworkCapabilities newNc = new NetworkCapabilities(nc, redactions);

2187

// Reset owner uid if not destined for the owner app.

2188

if (callingUid != nc.getOwnerUid()) {

2189

newNc.setOwnerUid(INVALID_UID);

2190

return newNc;

2191

}

2192

// Allow VPNs to see ownership of their own VPN networks - not location sensitive.

2193

if (nc.hasTransport(TRANSPORT_VPN)) {

2194

// Owner UIDs already checked above. No need to re-check.

2195

return newNc;

2196

}

2197

// If the calling does not want location sensitive data & target SDK >= S, then mask info.

2198

// Else include the owner UID iff the calling has location permission to provide backwards

2199

// compatibility for older apps.

2200

if (!includeLocationSensitiveInfo

2201

&& isTargetSdkAtleast(

2202

Build.VERSION_CODES.S, callingUid, callingPkgName)) {

2203

newNc.setOwnerUid(INVALID_UID);

2204

return newNc;

2205

}

2206

// Reset owner uid if the app has no location permission.

2207

if (!redactionPermissionChecker.hasLocationPermission()) {

2208

newNc.setOwnerUid(INVALID_UID);

}

return newNc;

}

private LinkProperties linkPropertiesRestrictedForCallerPermissions(

2214

LinkProperties lp, int callerPid, int callerUid) {

2215

if (lp == null) return new LinkProperties();

2216

2217

// Only do a permission check if sanitization is needed, to avoid unnecessary binder calls.

2218

final boolean needsSanitization =

2219

(lp.getCaptivePortalApiUrl() != null || lp.getCaptivePortalData() != null);

2220

if (!needsSanitization) {

2221

return new LinkProperties(lp);

2222

}

2223

2224

if (checkSettingsPermission(callerPid, callerUid)) {

2225

return new LinkProperties(lp, true /* parcelSensitiveFields */);

2226

}

2227

2228

final LinkProperties newLp = new LinkProperties(lp);

2229

// Sensitive fields would not be parceled anyway, but sanitize for consistency before the

2230

// object gets parceled.

2231

newLp.setCaptivePortalApiUrl(null);

2232

newLp.setCaptivePortalData(null);

return newLp;

}

private void restrictRequestUidsForCallerAndSetRequestorInfo(NetworkCapabilities nc,

2237

int callerUid, String callerPackageName) {

Lorenzo Colitti

86714b1

2021-05-17 20:31:21 +0900

[diff] [blame]

2238

// There is no need to track the effective UID of the request here. If the caller

2239

// lacks the settings permission, the effective UID is the same as the calling ID.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

2240

if (!checkSettingsPermission()) {

Lorenzo Colitti

86714b1

2021-05-17 20:31:21 +0900

[diff] [blame]

2241

// Unprivileged apps can only pass in null or their own UID.

2242

if (nc.getUids() == null) {

2243

// If the caller passes in null, the callback will also match networks that do not

2244

// apply to its UID, similarly to what it would see if it called getAllNetworks.

2245

// In this case, redact everything in the request immediately. This ensures that the

2246

// app is not able to get any redacted information by filing an unredacted request

2247

// and observing whether the request matches something.

2248

if (nc.getNetworkSpecifier() != null) {

2249

nc.setNetworkSpecifier(nc.getNetworkSpecifier().redact());

2250

}

2251

} else {

2252

nc.setSingleUid(callerUid);

2253

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

2254

}

2255

nc.setRequestorUidAndPackageName(callerUid, callerPackageName);

2256

nc.setAdministratorUids(new int[0]);

2257

2258

// Clear owner UID; this can never come from an app.

2259

nc.setOwnerUid(INVALID_UID);

2260

}

2261

2262

private void restrictBackgroundRequestForCaller(NetworkCapabilities nc) {

2263

if (!mPermissionMonitor.hasUseBackgroundNetworksPermission(mDeps.getCallingUid())) {

2264

nc.addCapability(NET_CAPABILITY_FOREGROUND);

}

}

@Override

public @RestrictBackgroundStatus int getRestrictBackgroundStatusByCaller() {

2270

enforceAccessPermission();

2271

final int callerUid = Binder.getCallingUid();

2272

final long token = Binder.clearCallingIdentity();

2273

try {

2274

return mPolicyManager.getRestrictBackgroundStatus(callerUid);

2275

} finally {

2276

Binder.restoreCallingIdentity(token);

}

}

// TODO: Consider delete this function or turn it into a no-op method.

2281

@Override

2282

public NetworkState[] getAllNetworkState() {

2283

// This contains IMSI details, so make sure the caller is privileged.

2284

PermissionUtils.enforceNetworkStackPermission(mContext);

2285

2286

final ArrayList<NetworkState> result = new ArrayList<>();

2287

for (NetworkStateSnapshot snapshot : getAllNetworkStateSnapshots()) {

2288

// NetworkStateSnapshot doesn't contain NetworkInfo, so need to fetch it from the

2289

// NetworkAgentInfo.

2290

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(snapshot.getNetwork());

2291

if (nai != null && nai.networkInfo.isConnected()) {

2292

result.add(new NetworkState(new NetworkInfo(nai.networkInfo),

2293

snapshot.getLinkProperties(), snapshot.getNetworkCapabilities(),

2294

snapshot.getNetwork(), snapshot.getSubscriberId()));

2295

}

2296

}

2297

return result.toArray(new NetworkState[result.size()]);

}

@Override

@NonNull

public List<NetworkStateSnapshot> getAllNetworkStateSnapshots() {

2303

// This contains IMSI details, so make sure the caller is privileged.

junyulai

7968fba

2021-05-14 18:04:29 +0800

[diff] [blame]

2304

enforceNetworkStackOrSettingsPermission();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

2305

2306

final ArrayList<NetworkStateSnapshot> result = new ArrayList<>();

2307

for (Network network : getAllNetworks()) {

2308

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

2309

// TODO: Consider include SUSPENDED networks, which should be considered as

2310

// temporary shortage of connectivity of a connected network.

2311

if (nai != null && nai.networkInfo.isConnected()) {

2312

// TODO (b/73321673) : NetworkStateSnapshot contains a copy of the

2313

// NetworkCapabilities, which may contain UIDs of apps to which the

2314

// network applies. Should the UIDs be cleared so as not to leak or

2315

// interfere ?

2316

result.add(nai.getNetworkStateSnapshot());

}

}

return result;

}

@Override

public boolean isActiveNetworkMetered() {

2324

enforceAccessPermission();

2325

2326

final NetworkCapabilities caps = getNetworkCapabilitiesInternal(getActiveNetwork());

2327

if (caps != null) {

2328

return !caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED);

2329

} else {

2330

// Always return the most conservative value

return true;

}

}

/**

* Ensures that the system cannot call a particular method.

2337

*/

2338

private boolean disallowedBecauseSystemCaller() {

2339

// TODO: start throwing a SecurityException when GnssLocationProvider stops calling

2340

// requestRouteToHost. In Q, GnssLocationProvider is changed to not call requestRouteToHost

2341

// for devices launched with Q and above. However, existing devices upgrading to Q and

2342

// above must continued to be supported for few more releases.

2343

if (isSystem(mDeps.getCallingUid()) && SystemProperties.getInt(

2344

"ro.product.first_api_level", 0) > Build.VERSION_CODES.P) {

2345

log("This method exists only for app backwards compatibility"

2346

+ " and must not be called by system services.");

return true;

}

return false;

}

/**

* Ensure that a network route exists to deliver traffic to the specified

2354

* host via the specified network interface.

2355

* @param networkType the type of the network over which traffic to the

2356

* specified host is to be routed

2357

* @param hostAddress the IP address of the host to which the route is

2358

* desired

2359

* @return {@code true} on success, {@code false} on failure

2360

*/

2361

@Override

2362

public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress,

2363

String callingPackageName, String callingAttributionTag) {

2364

if (disallowedBecauseSystemCaller()) {

2365

return false;

2366

}

2367

enforceChangePermission(callingPackageName, callingAttributionTag);

2368

if (mProtectedNetworks.contains(networkType)) {

2369

enforceConnectivityRestrictedNetworksPermission();

}

InetAddress addr;

try {

addr = InetAddress.getByAddress(hostAddress);

2375

} catch (UnknownHostException e) {

2376

if (DBG) log("requestRouteToHostAddress got " + e.toString());

return false;

}

if (!ConnectivityManager.isNetworkTypeValid(networkType)) {

2381

if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType);

return false;

}

NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);

2386

if (nai == null) {

2387

if (mLegacyTypeTracker.isTypeSupported(networkType) == false) {

2388

if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType);

2389

} else {

2390

if (DBG) log("requestRouteToHostAddress on down network: " + networkType);

}

return false;

}

DetailedState netState;

2396

synchronized (nai) {

2397

netState = nai.networkInfo.getDetailedState();

2398

}

2399

2400

if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) {

2401

if (VDBG) {

2402

log("requestRouteToHostAddress on down network "

2403

+ "(" + networkType + ") - dropped"

2404

+ " netState=" + netState);

}

return false;

}

final int uid = mDeps.getCallingUid();

2410

final long token = Binder.clearCallingIdentity();

try {

LinkProperties lp;

int netId;

synchronized (nai) {

lp = nai.linkProperties;

2416

netId = nai.network.getNetId();

2417

}

2418

boolean ok = addLegacyRouteToHost(lp, addr, netId, uid);

2419

if (DBG) {

2420

log("requestRouteToHostAddress " + addr + nai.toShortString() + " ok=" + ok);

}

return ok;

} finally {

Binder.restoreCallingIdentity(token);

}

}

private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) {

2429

RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr);

2430

if (bestRoute == null) {

2431

bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName());

2432

} else {

2433

String iface = bestRoute.getInterface();

2434

if (bestRoute.getGateway().equals(addr)) {

2435

// if there is no better route, add the implied hostroute for our gateway

2436

bestRoute = RouteInfo.makeHostRoute(addr, iface);

2437

} else {

2438

// if we will connect to this through another route, add a direct route

2439

// to it's gateway

2440

bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface);

2441

}

2442

}

2443

if (DBG) log("Adding legacy route " + bestRoute +

2444

" for UID/PID " + uid + "/" + Binder.getCallingPid());

2445

2446

final String dst = bestRoute.getDestinationLinkAddress().toString();

2447

final String nextHop = bestRoute.hasGateway()

2448

? bestRoute.getGateway().getHostAddress() : "";

2449

try {

2450

mNetd.networkAddLegacyRoute(netId, bestRoute.getInterface(), dst, nextHop , uid);

2451

} catch (RemoteException | ServiceSpecificException e) {

2452

if (DBG) loge("Exception trying to add a route: " + e);

return false;

}

return true;

}

class DnsResolverUnsolicitedEventCallback extends

2459

IDnsResolverUnsolicitedEventListener.Stub {

2460

@Override

2461

public void onPrivateDnsValidationEvent(final PrivateDnsValidationEventParcel event) {

2462

try {

2463

mHandler.sendMessage(mHandler.obtainMessage(

2464

EVENT_PRIVATE_DNS_VALIDATION_UPDATE,

2465

new PrivateDnsValidationUpdate(event.netId,

2466

InetAddresses.parseNumericAddress(event.ipAddress),

2467

event.hostname, event.validation)));

2468

} catch (IllegalArgumentException e) {

2469

loge("Error parsing ip address in validation event");

}

}

@Override

public void onDnsHealthEvent(final DnsHealthEventParcel event) {

2475

NetworkAgentInfo nai = getNetworkAgentInfoForNetId(event.netId);

2476

// Netd event only allow registrants from system. Each NetworkMonitor thread is under

2477

// the caller thread of registerNetworkAgent. Thus, it's not allowed to register netd

2478

// event callback for certain nai. e.g. cellular. Register here to pass to

2479

// NetworkMonitor instead.

2480

// TODO: Move the Dns Event to NetworkMonitor. NetdEventListenerService only allow one

2481

// callback from each caller type. Need to re-factor NetdEventListenerService to allow

2482

// multiple NetworkMonitor registrants.

2483

if (nai != null && nai.satisfies(mDefaultRequest.mRequests.get(0))) {

2484

nai.networkMonitor().notifyDnsResponse(event.healthResult);

}

}

@Override

public void onNat64PrefixEvent(final Nat64PrefixEventParcel event) {

2490

mHandler.post(() -> handleNat64PrefixEvent(event.netId, event.prefixOperation,

2491

event.prefixAddress, event.prefixLength));

}

@Override

public int getInterfaceVersion() {

return this.VERSION;

}

@Override

public String getInterfaceHash() {

return this.HASH;

}

}

@VisibleForTesting

protected final DnsResolverUnsolicitedEventCallback mResolverUnsolEventCallback =

2507

new DnsResolverUnsolicitedEventCallback();

2508

2509

private void registerDnsResolverUnsolicitedEventListener() {

2510

try {

2511

mDnsResolver.registerUnsolicitedEventListener(mResolverUnsolEventCallback);

2512

} catch (Exception e) {

2513

loge("Error registering DnsResolver unsolicited event callback: " + e);

}

}

private final NetworkPolicyCallback mPolicyCallback = new NetworkPolicyCallback() {

2518

@Override

2519

public void onUidBlockedReasonChanged(int uid, @BlockedReason int blockedReasons) {

2520

mHandler.sendMessage(mHandler.obtainMessage(EVENT_UID_BLOCKED_REASON_CHANGED,

2521

uid, blockedReasons));

}

};

private void handleUidBlockedReasonChanged(int uid, @BlockedReason int blockedReasons) {

2526

maybeNotifyNetworkBlockedForNewState(uid, blockedReasons);

2527

setUidBlockedReasons(uid, blockedReasons);

2528

}

2529

2530

private boolean checkAnyPermissionOf(String... permissions) {

2531

for (String permission : permissions) {

2532

if (mContext.checkCallingOrSelfPermission(permission) == PERMISSION_GRANTED) {

return true;

}

}

return false;

}

private boolean checkAnyPermissionOf(int pid, int uid, String... permissions) {

2540

for (String permission : permissions) {

2541

if (mContext.checkPermission(permission, pid, uid) == PERMISSION_GRANTED) {

return true;

}

}

return false;

}

private void enforceAnyPermissionOf(String... permissions) {

2549

if (!checkAnyPermissionOf(permissions)) {

2550

throw new SecurityException("Requires one of the following permissions: "

2551

+ String.join(", ", permissions) + ".");

}

}

private void enforceInternetPermission() {

2556

mContext.enforceCallingOrSelfPermission(

2557

android.Manifest.permission.INTERNET,

2558

"ConnectivityService");

2559

}

2560

2561

private void enforceAccessPermission() {

2562

mContext.enforceCallingOrSelfPermission(

2563

android.Manifest.permission.ACCESS_NETWORK_STATE,

2564

"ConnectivityService");

}

/**

* Performs a strict and comprehensive check of whether a calling package is allowed to

2569

* change the state of network, as the condition differs for pre-M, M+, and

2570

* privileged/preinstalled apps. The caller is expected to have either the

2571

* CHANGE_NETWORK_STATE or the WRITE_SETTINGS permission declared. Either of these

2572

* permissions allow changing network state; WRITE_SETTINGS is a runtime permission and

2573

* can be revoked, but (except in M, excluding M MRs), CHANGE_NETWORK_STATE is a normal

2574

* permission and cannot be revoked. See http://b/23597341

2575

*

2576

* Note: if the check succeeds because the application holds WRITE_SETTINGS, the operation

2577

* of this app will be updated to the current time.

2578

*/

2579

private void enforceChangePermission(String callingPkg, String callingAttributionTag) {

2580

if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.CHANGE_NETWORK_STATE)

2581

== PackageManager.PERMISSION_GRANTED) {

return;

}

if (callingPkg == null) {

2586

throw new SecurityException("Calling package name is null.");

2587

}

2588

2589

final AppOpsManager appOpsMgr = mContext.getSystemService(AppOpsManager.class);

2590

final int uid = mDeps.getCallingUid();

2591

final int mode = appOpsMgr.noteOpNoThrow(AppOpsManager.OPSTR_WRITE_SETTINGS, uid,

2592

callingPkg, callingAttributionTag, null /* message */);

2593

2594

if (mode == AppOpsManager.MODE_ALLOWED) {

return;

}

if ((mode == AppOpsManager.MODE_DEFAULT) && (mContext.checkCallingOrSelfPermission(

2599

android.Manifest.permission.WRITE_SETTINGS) == PackageManager.PERMISSION_GRANTED)) {

return;

}

throw new SecurityException(callingPkg + " was not granted either of these permissions:"

2604

+ android.Manifest.permission.CHANGE_NETWORK_STATE + ","

2605

+ android.Manifest.permission.WRITE_SETTINGS + ".");

2606

}

2607

2608

private void enforceSettingsPermission() {

2609

enforceAnyPermissionOf(

2610

android.Manifest.permission.NETWORK_SETTINGS,

2611

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2612

}

2613

2614

private void enforceNetworkFactoryPermission() {

2615

enforceAnyPermissionOf(

2616

android.Manifest.permission.NETWORK_FACTORY,

2617

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2618

}

2619

2620

private void enforceNetworkFactoryOrSettingsPermission() {

2621

enforceAnyPermissionOf(

2622

android.Manifest.permission.NETWORK_SETTINGS,

2623

android.Manifest.permission.NETWORK_FACTORY,

2624

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2625

}

2626

2627

private void enforceNetworkFactoryOrTestNetworksPermission() {

2628

enforceAnyPermissionOf(

2629

android.Manifest.permission.MANAGE_TEST_NETWORKS,

2630

android.Manifest.permission.NETWORK_FACTORY,

2631

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2632

}

2633

2634

private boolean checkSettingsPermission() {

2635

return checkAnyPermissionOf(

2636

android.Manifest.permission.NETWORK_SETTINGS,

2637

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2638

}

2639

2640

private boolean checkSettingsPermission(int pid, int uid) {

2641

return PERMISSION_GRANTED == mContext.checkPermission(

2642

android.Manifest.permission.NETWORK_SETTINGS, pid, uid)

2643

|| PERMISSION_GRANTED == mContext.checkPermission(

2644

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, pid, uid);

2645

}

2646

2647

private void enforceNetworkStackOrSettingsPermission() {

2648

enforceAnyPermissionOf(

2649

android.Manifest.permission.NETWORK_SETTINGS,

2650

android.Manifest.permission.NETWORK_STACK,

2651

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2652

}

2653

2654

private void enforceNetworkStackSettingsOrSetup() {

2655

enforceAnyPermissionOf(

2656

android.Manifest.permission.NETWORK_SETTINGS,

2657

android.Manifest.permission.NETWORK_SETUP_WIZARD,

2658

android.Manifest.permission.NETWORK_STACK,

2659

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2660

}

2661

2662

private void enforceAirplaneModePermission() {

2663

enforceAnyPermissionOf(

2664

android.Manifest.permission.NETWORK_AIRPLANE_MODE,

2665

android.Manifest.permission.NETWORK_SETTINGS,

2666

android.Manifest.permission.NETWORK_SETUP_WIZARD,

2667

android.Manifest.permission.NETWORK_STACK,

2668

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2669

}

2670

2671

private void enforceOemNetworkPreferencesPermission() {

2672

mContext.enforceCallingOrSelfPermission(

2673

android.Manifest.permission.CONTROL_OEM_PAID_NETWORK_PREFERENCE,

2674

"ConnectivityService");

2675

}

2676

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

2677

private void enforceManageTestNetworksPermission() {

2678

mContext.enforceCallingOrSelfPermission(

2679

android.Manifest.permission.MANAGE_TEST_NETWORKS,

2680

"ConnectivityService");

2681

}

2682

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

2683

private boolean checkNetworkStackPermission() {

2684

return checkAnyPermissionOf(

2685

android.Manifest.permission.NETWORK_STACK,

2686

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2687

}

2688

2689

private boolean checkNetworkStackPermission(int pid, int uid) {

2690

return checkAnyPermissionOf(pid, uid,

2691

android.Manifest.permission.NETWORK_STACK,

2692

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2693

}

2694

2695

private boolean checkNetworkSignalStrengthWakeupPermission(int pid, int uid) {

2696

return checkAnyPermissionOf(pid, uid,

2697

android.Manifest.permission.NETWORK_SIGNAL_STRENGTH_WAKEUP,

2698

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,

2699

android.Manifest.permission.NETWORK_SETTINGS);

2700

}

2701

2702

private void enforceConnectivityRestrictedNetworksPermission() {

2703

try {

2704

mContext.enforceCallingOrSelfPermission(

2705

android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS,

2706

"ConnectivityService");

2707

return;

2708

} catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ }

2709

// TODO: Remove this fallback check after all apps have declared

2710

// CONNECTIVITY_USE_RESTRICTED_NETWORKS.

2711

mContext.enforceCallingOrSelfPermission(

2712

android.Manifest.permission.CONNECTIVITY_INTERNAL,

2713

"ConnectivityService");

2714

}

2715

2716

private void enforceKeepalivePermission() {

2717

mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService");

2718

}

2719

2720

private boolean checkLocalMacAddressPermission(int pid, int uid) {

2721

return PERMISSION_GRANTED == mContext.checkPermission(

2722

Manifest.permission.LOCAL_MAC_ADDRESS, pid, uid);

2723

}

2724

2725

private void sendConnectedBroadcast(NetworkInfo info) {

2726

sendGeneralBroadcast(info, CONNECTIVITY_ACTION);

2727

}

2728

2729

private void sendInetConditionBroadcast(NetworkInfo info) {

2730

sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION);

2731

}

2732

2733

private Intent makeGeneralIntent(NetworkInfo info, String bcastType) {

2734

Intent intent = new Intent(bcastType);

2735

intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info));

2736

intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType());

2737

if (info.isFailover()) {

2738

intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);

2739

info.setFailover(false);

2740

}

2741

if (info.getReason() != null) {

2742

intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());

2743

}

2744

if (info.getExtraInfo() != null) {

2745

intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO,

2746

info.getExtraInfo());

2747

}

2748

intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);

return intent;

}

private void sendGeneralBroadcast(NetworkInfo info, String bcastType) {

2753

sendStickyBroadcast(makeGeneralIntent(info, bcastType));

2754

}

2755

2756

private void sendStickyBroadcast(Intent intent) {

2757

synchronized (this) {

2758

if (!mSystemReady

2759

&& intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {

2760

mInitialBroadcast = new Intent(intent);

2761

}

2762

intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);

2763

if (VDBG) {

2764

log("sendStickyBroadcast: action=" + intent.getAction());

2765

}

2766

2767

Bundle options = null;

2768

final long ident = Binder.clearCallingIdentity();

2769

if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {

2770

final NetworkInfo ni = intent.getParcelableExtra(

2771

ConnectivityManager.EXTRA_NETWORK_INFO);

2772

final BroadcastOptions opts = BroadcastOptions.makeBasic();

2773

opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M);

2774

options = opts.toBundle();

2775

intent.addFlags(Intent.FLAG_RECEIVER_VISIBLE_TO_INSTANT_APPS);

2776

}

2777

try {

2778

mUserAllContext.sendStickyBroadcast(intent, options);

2779

} finally {

2780

Binder.restoreCallingIdentity(ident);

}

}

}

/**

* Called by SystemServer through ConnectivityManager when the system is ready.

2787

*/

2788

@Override

2789

public void systemReady() {

2790

if (mDeps.getCallingUid() != Process.SYSTEM_UID) {

2791

throw new SecurityException("Calling Uid is not system uid.");

2792

}

2793

systemReadyInternal();

}

/**

* Called when ConnectivityService can initialize remaining components.

2798

*/

2799

@VisibleForTesting

2800

public void systemReadyInternal() {

2801

// Since mApps in PermissionMonitor needs to be populated first to ensure that

2802

// listening network request which is sent by MultipathPolicyTracker won't be added

2803

// NET_CAPABILITY_FOREGROUND capability. Thus, MultipathPolicyTracker.start() must

2804

// be called after PermissionMonitor#startMonitoring().

2805

// Calling PermissionMonitor#startMonitoring() in systemReadyInternal() and the

2806

// MultipathPolicyTracker.start() is called in NetworkPolicyManagerService#systemReady()

2807

// to ensure the tracking will be initialized correctly.

2808

mPermissionMonitor.startMonitoring();

2809

mProxyTracker.loadGlobalProxy();

2810

registerDnsResolverUnsolicitedEventListener();

2811

2812

synchronized (this) {

2813

mSystemReady = true;

2814

if (mInitialBroadcast != null) {

2815

mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL);

2816

mInitialBroadcast = null;

}

}

// Create network requests for always-on networks.

2821

mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_ALWAYS_ON_NETWORKS));

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

2822

2823

// Update mobile data preference if necessary.

2824

// Note that empty uid list can be skip here only because no uid rules applied before system

2825

// ready. Normally, the empty uid list means to clear the uids rules on netd.

2826

if (!ConnectivitySettingsManager.getMobileDataPreferredUids(mContext).isEmpty()) {

2827

updateMobileDataPreferredUids();

2828

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

/**

* Start listening for default data network activity state changes.

2833

*/

2834

@Override

2835

public void registerNetworkActivityListener(@NonNull INetworkActivityListener l) {

2836

mNetworkActivityTracker.registerNetworkActivityListener(l);

}

/**

* Stop listening for default data network activity state changes.

2841

*/

2842

@Override

2843

public void unregisterNetworkActivityListener(@NonNull INetworkActivityListener l) {

2844

mNetworkActivityTracker.unregisterNetworkActivityListener(l);

}

/**

* Check whether the default network radio is currently active.

2849

*/

2850

@Override

2851

public boolean isDefaultNetworkActive() {

2852

return mNetworkActivityTracker.isDefaultNetworkActive();

}

/**

* Reads the network specific MTU size from resources.

2857

* and set it on it's iface.

2858

*/

2859

private void updateMtu(LinkProperties newLp, LinkProperties oldLp) {

2860

final String iface = newLp.getInterfaceName();

2861

final int mtu = newLp.getMtu();

2862

if (oldLp == null && mtu == 0) {

2863

// Silently ignore unset MTU value.

2864

return;

2865

}

2866

if (oldLp != null && newLp.isIdenticalMtu(oldLp)) {

2867

if (VDBG) log("identical MTU - not setting");

2868

return;

2869

}

2870

if (!LinkProperties.isValidMtu(mtu, newLp.hasGlobalIpv6Address())) {

2871

if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface);

return;

}

// Cannot set MTU without interface name

2876

if (TextUtils.isEmpty(iface)) {

2877

loge("Setting MTU size with null iface.");

return;

}

try {

if (VDBG || DDBG) log("Setting MTU size: " + iface + ", " + mtu);

2883

mNetd.interfaceSetMtu(iface, mtu);

2884

} catch (RemoteException | ServiceSpecificException e) {

2885

loge("exception in interfaceSetMtu()" + e);

}

}

@VisibleForTesting

protected static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208";

2891

2892

private void updateTcpBufferSizes(String tcpBufferSizes) {

2893

String[] values = null;

2894

if (tcpBufferSizes != null) {

2895

values = tcpBufferSizes.split(",");

2896

}

2897

2898

if (values == null || values.length != 6) {

2899

if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults");

2900

tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES;

2901

values = tcpBufferSizes.split(",");

2902

}

2903

2904

if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return;

2905

2906

try {

2907

if (VDBG || DDBG) log("Setting tx/rx TCP buffers to " + tcpBufferSizes);

2908

2909

String rmemValues = String.join(" ", values[0], values[1], values[2]);

2910

String wmemValues = String.join(" ", values[3], values[4], values[5]);

2911

mNetd.setTcpRWmemorySize(rmemValues, wmemValues);

2912

mCurrentTcpBufferSizes = tcpBufferSizes;

2913

} catch (RemoteException | ServiceSpecificException e) {

2914

loge("Can't set TCP buffer sizes:" + e);

}

}

@Override

public int getRestoreDefaultNetworkDelay(int networkType) {

2920

String restoreDefaultNetworkDelayStr = mSystemProperties.get(

2921

NETWORK_RESTORE_DELAY_PROP_NAME);

2922

if(restoreDefaultNetworkDelayStr != null &&

2923

restoreDefaultNetworkDelayStr.length() != 0) {

2924

try {

2925

return Integer.parseInt(restoreDefaultNetworkDelayStr);

2926

} catch (NumberFormatException e) {

2927

}

2928

}

2929

// if the system property isn't set, use the value for the apn type

2930

int ret = RESTORE_DEFAULT_NETWORK_DELAY;

2931

2932

if (mLegacyTypeTracker.isTypeSupported(networkType)) {

2933

ret = mLegacyTypeTracker.getRestoreTimerForType(networkType);

}

return ret;

}

private void dumpNetworkDiagnostics(IndentingPrintWriter pw) {

2939

final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>();

2940

final long DIAG_TIME_MS = 5000;

2941

for (NetworkAgentInfo nai : networksSortedById()) {

2942

PrivateDnsConfig privateDnsCfg = mDnsManager.getPrivateDnsConfig(nai.network);

2943

// Start gathering diagnostic information.

2944

netDiags.add(new NetworkDiagnostics(

2945

nai.network,

2946

new LinkProperties(nai.linkProperties), // Must be a copy.

privateDnsCfg,

DIAG_TIME_MS));

}

for (NetworkDiagnostics netDiag : netDiags) {

2952

pw.println();

2953

netDiag.waitForMeasurements();

netDiag.dump(pw);

}

}

@Override

protected void dump(@NonNull FileDescriptor fd, @NonNull PrintWriter writer,

2960

@Nullable String[] args) {

2961

if (!checkDumpPermission(mContext, TAG, writer)) return;

2962

2963

mPriorityDumper.dump(fd, writer, args);

2964

}

2965

2966

private boolean checkDumpPermission(Context context, String tag, PrintWriter pw) {

2967

if (context.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)

2968

!= PackageManager.PERMISSION_GRANTED) {

2969

pw.println("Permission Denial: can't dump " + tag + " from from pid="

2970

+ Binder.getCallingPid() + ", uid=" + mDeps.getCallingUid()

2971

+ " due to missing android.permission.DUMP permission");

return false;

} else {

return true;

}

}

private void doDump(FileDescriptor fd, PrintWriter writer, String[] args) {

2979

final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " ");

2980

2981

if (CollectionUtils.contains(args, DIAG_ARG)) {

2982

dumpNetworkDiagnostics(pw);

2983

return;

2984

} else if (CollectionUtils.contains(args, NETWORK_ARG)) {

2985

dumpNetworks(pw);

2986

return;

2987

} else if (CollectionUtils.contains(args, REQUEST_ARG)) {

2988

dumpNetworkRequests(pw);

return;

}

pw.print("NetworkProviders for:");

2993

for (NetworkProviderInfo npi : mNetworkProviderInfos.values()) {

2994

pw.print(" " + npi.name);

}

pw.println();

pw.println();

final NetworkAgentInfo defaultNai = getDefaultNetwork();

3000

pw.print("Active default network: ");

3001

if (defaultNai == null) {

3002

pw.println("none");

3003

} else {

3004

pw.println(defaultNai.network.getNetId());

}

pw.println();

pw.print("Current per-app default networks: ");

3009

pw.increaseIndent();

3010

dumpPerAppNetworkPreferences(pw);

pw.decreaseIndent();

pw.println();

pw.println("Current Networks:");

pw.increaseIndent();

dumpNetworks(pw);

pw.decreaseIndent();

pw.println();

pw.println("Status for known UIDs:");

3021

pw.increaseIndent();

3022

final int size = mUidBlockedReasons.size();

3023

for (int i = 0; i < size; i++) {

3024

// Don't crash if the array is modified while dumping in bugreports.

3025

try {

3026

final int uid = mUidBlockedReasons.keyAt(i);

3027

final int blockedReasons = mUidBlockedReasons.valueAt(i);

3028

pw.println("UID=" + uid + " blockedReasons="

3029

+ Integer.toHexString(blockedReasons));

3030

} catch (ArrayIndexOutOfBoundsException e) {

3031

pw.println(" ArrayIndexOutOfBoundsException");

3032

} catch (ConcurrentModificationException e) {

3033

pw.println(" ConcurrentModificationException");

}

}

pw.println();

pw.decreaseIndent();

pw.println("Network Requests:");

3040

pw.increaseIndent();

3041

dumpNetworkRequests(pw);

pw.decreaseIndent();

pw.println();

mLegacyTypeTracker.dump(pw);

3046

3047

pw.println();

3048

mKeepaliveTracker.dump(pw);

3049

3050

pw.println();

3051

dumpAvoidBadWifiSettings(pw);

pw.println();

if (!CollectionUtils.contains(args, SHORT_ARG)) {

3056

pw.println();

3057

pw.println("mNetworkRequestInfoLogs (most recent first):");

3058

pw.increaseIndent();

3059

mNetworkRequestInfoLogs.reverseDump(pw);

pw.decreaseIndent();

pw.println();

pw.println("mNetworkInfoBlockingLogs (most recent first):");

3064

pw.increaseIndent();

3065

mNetworkInfoBlockingLogs.reverseDump(pw);

pw.decreaseIndent();

pw.println();

pw.println("NetTransition WakeLock activity (most recent first):");

3070

pw.increaseIndent();

3071

pw.println("total acquisitions: " + mTotalWakelockAcquisitions);

3072

pw.println("total releases: " + mTotalWakelockReleases);

3073

pw.println("cumulative duration: " + (mTotalWakelockDurationMs / 1000) + "s");

3074

pw.println("longest duration: " + (mMaxWakelockDurationMs / 1000) + "s");

3075

if (mTotalWakelockAcquisitions > mTotalWakelockReleases) {

3076

long duration = SystemClock.elapsedRealtime() - mLastWakeLockAcquireTimestamp;

3077

pw.println("currently holding WakeLock for: " + (duration / 1000) + "s");

3078

}

3079

mWakelockLogs.reverseDump(pw);

3080

3081

pw.println();

3082

pw.println("bandwidth update requests (by uid):");

3083

pw.increaseIndent();

3084

synchronized (mBandwidthRequests) {

3085

for (int i = 0; i < mBandwidthRequests.size(); i++) {

3086

pw.println("[" + mBandwidthRequests.keyAt(i)

3087

+ "]: " + mBandwidthRequests.valueAt(i));

}

}

pw.decreaseIndent();

pw.decreaseIndent();

pw.println();

pw.println("mOemNetworkPreferencesLogs (most recent first):");

3095

pw.increaseIndent();

3096

mOemNetworkPreferencesLogs.reverseDump(pw);

pw.decreaseIndent();

}

pw.println();

pw.println();

pw.println("Permission Monitor:");

3104

pw.increaseIndent();

3105

mPermissionMonitor.dump(pw);

pw.decreaseIndent();

pw.println();

pw.println("Legacy network activity:");

3110

pw.increaseIndent();

3111

mNetworkActivityTracker.dump(pw);

pw.decreaseIndent();

}

private void dumpNetworks(IndentingPrintWriter pw) {

3116

for (NetworkAgentInfo nai : networksSortedById()) {

3117

pw.println(nai.toString());

3118

pw.increaseIndent();

3119

pw.println(String.format(

3120

"Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d",

3121

nai.numForegroundNetworkRequests(),

3122

nai.numNetworkRequests() - nai.numRequestNetworkRequests(),

3123

nai.numBackgroundNetworkRequests(),

3124

nai.numNetworkRequests()));

3125

pw.increaseIndent();

3126

for (int i = 0; i < nai.numNetworkRequests(); i++) {

3127

pw.println(nai.requestAt(i).toString());

3128

}

3129

pw.decreaseIndent();

3130

pw.println("Inactivity Timers:");

3131

pw.increaseIndent();

3132

nai.dumpInactivityTimers(pw);

pw.decreaseIndent();

pw.decreaseIndent();

}

}

private void dumpPerAppNetworkPreferences(IndentingPrintWriter pw) {

3139

pw.println("Per-App Network Preference:");

3140

pw.increaseIndent();

3141

if (0 == mOemNetworkPreferences.getNetworkPreferences().size()) {

3142

pw.println("none");

3143

} else {

3144

pw.println(mOemNetworkPreferences.toString());

}

pw.decreaseIndent();

for (final NetworkRequestInfo defaultRequest : mDefaultNetworkRequests) {

3149

if (mDefaultRequest == defaultRequest) {

continue;

}

final boolean isActive = null != defaultRequest.getSatisfier();

3154

pw.println("Is per-app network active:");

3155

pw.increaseIndent();

3156

pw.println(isActive);

3157

if (isActive) {

3158

pw.println("Active network: " + defaultRequest.getSatisfier().network.netId);

3159

}

3160

pw.println("Tracked UIDs:");

3161

pw.increaseIndent();

3162

if (0 == defaultRequest.mRequests.size()) {

3163

pw.println("none, this should never occur.");

3164

} else {

3165

pw.println(defaultRequest.mRequests.get(0).networkCapabilities.getUidRanges());

}

pw.decreaseIndent();

pw.decreaseIndent();

}

}

private void dumpNetworkRequests(IndentingPrintWriter pw) {

3173

for (NetworkRequestInfo nri : requestsSortedById()) {

3174

pw.println(nri.toString());

}

}

/**

* Return an array of all current NetworkAgentInfos sorted by network id.

3180

*/

3181

private NetworkAgentInfo[] networksSortedById() {

3182

NetworkAgentInfo[] networks = new NetworkAgentInfo[0];

3183

networks = mNetworkAgentInfos.toArray(networks);

3184

Arrays.sort(networks, Comparator.comparingInt(nai -> nai.network.getNetId()));

return networks;

}

/**

* Return an array of all current NetworkRequest sorted by request id.

3190

*/

3191

@VisibleForTesting

3192

NetworkRequestInfo[] requestsSortedById() {

3193

NetworkRequestInfo[] requests = new NetworkRequestInfo[0];

3194

requests = getNrisFromGlobalRequests().toArray(requests);

3195

// Sort the array based off the NRI containing the min requestId in its requests.

3196

Arrays.sort(requests,

3197

Comparator.comparingInt(nri -> Collections.min(nri.mRequests,

3198

Comparator.comparingInt(req -> req.requestId)).requestId

)

);

return requests;

}

private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) {

3205

final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network);

3206

if (officialNai != null && officialNai.equals(nai)) return true;

3207

if (officialNai != null || VDBG) {

3208

loge(eventName(what) + " - isLiveNetworkAgent found mismatched netId: " + officialNai +

" - " + nai);

}

return false;

}

// must be stateless - things change under us.

3215

private class NetworkStateTrackerHandler extends Handler {

3216

public NetworkStateTrackerHandler(Looper looper) {

super(looper);

}

private void maybeHandleNetworkAgentMessage(Message msg) {

3221

final Pair<NetworkAgentInfo, Object> arg = (Pair<NetworkAgentInfo, Object>) msg.obj;

3222

final NetworkAgentInfo nai = arg.first;

3223

if (!mNetworkAgentInfos.contains(nai)) {

3224

if (VDBG) {

3225

log(String.format("%s from unknown NetworkAgent", eventName(msg.what)));

}

return;

}

switch (msg.what) {

case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: {

3232

NetworkCapabilities networkCapabilities = (NetworkCapabilities) arg.second;

3233

if (networkCapabilities.hasConnectivityManagedCapability()) {

3234

Log.wtf(TAG, "BUG: " + nai + " has CS-managed capability.");

3235

}

3236

if (networkCapabilities.hasTransport(TRANSPORT_TEST)) {

3237

// Make sure the original object is not mutated. NetworkAgent normally

3238

// makes a copy of the capabilities when sending the message through

3239

// the Messenger, but if this ever changes, not making a defensive copy

3240

// here will give attack vectors to clients using this code path.

3241

networkCapabilities = new NetworkCapabilities(networkCapabilities);

3242

networkCapabilities.restrictCapabilitesForTestNetwork(nai.creatorUid);

3243

}

3244

processCapabilitiesFromAgent(nai, networkCapabilities);

3245

updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities);

3246

break;

3247

}

3248

case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: {

3249

LinkProperties newLp = (LinkProperties) arg.second;

3250

processLinkPropertiesFromAgent(nai, newLp);

3251

handleUpdateLinkProperties(nai, newLp);

3252

break;

3253

}

3254

case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: {

3255

NetworkInfo info = (NetworkInfo) arg.second;

3256

updateNetworkInfo(nai, info);

3257

break;

3258

}

3259

case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: {

3260

updateNetworkScore(nai, (NetworkScore) arg.second);

3261

break;

3262

}

3263

case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: {

3264

if (nai.everConnected) {

3265

loge("ERROR: cannot call explicitlySelected on already-connected network");

3266

// Note that if the NAI had been connected, this would affect the

3267

// score, and therefore would require re-mixing the score and performing

3268

// a rematch.

3269

}

3270

nai.networkAgentConfig.explicitlySelected = toBool(msg.arg1);

3271

nai.networkAgentConfig.acceptUnvalidated = toBool(msg.arg1) && toBool(msg.arg2);

3272

// Mark the network as temporarily accepting partial connectivity so that it

3273

// will be validated (and possibly become default) even if it only provides

3274

// partial internet access. Note that if user connects to partial connectivity

3275

// and choose "don't ask again", then wifi disconnected by some reasons(maybe

3276

// out of wifi coverage) and if the same wifi is available again, the device

3277

// will auto connect to this wifi even though the wifi has "no internet".

3278

// TODO: Evaluate using a separate setting in IpMemoryStore.

3279

nai.networkAgentConfig.acceptPartialConnectivity = toBool(msg.arg2);

3280

break;

3281

}

3282

case NetworkAgent.EVENT_SOCKET_KEEPALIVE: {

3283

mKeepaliveTracker.handleEventSocketKeepalive(nai, msg.arg1, msg.arg2);

3284

break;

3285

}

3286

case NetworkAgent.EVENT_UNDERLYING_NETWORKS_CHANGED: {

3287

// TODO: prevent loops, e.g., if a network declares itself as underlying.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

3288

final List<Network> underlying = (List<Network>) arg.second;

3289

3290

if (isLegacyLockdownNai(nai)

3291

&& (underlying == null || underlying.size() != 1)) {

3292

Log.wtf(TAG, "Legacy lockdown VPN " + nai.toShortString()

3293

+ " must have exactly one underlying network: " + underlying);

3294

}

3295

3296

final Network[] oldUnderlying = nai.declaredUnderlyingNetworks;

3297

nai.declaredUnderlyingNetworks = (underlying != null)

3298

? underlying.toArray(new Network[0]) : null;

3299

3300

if (!Arrays.equals(oldUnderlying, nai.declaredUnderlyingNetworks)) {

3301

if (DBG) {

3302

log(nai.toShortString() + " changed underlying networks to "

3303

+ Arrays.toString(nai.declaredUnderlyingNetworks));

3304

}

3305

updateCapabilitiesForNetwork(nai);

3306

notifyIfacesChangedForNetworkStats();

}

break;

}

case NetworkAgent.EVENT_TEARDOWN_DELAY_CHANGED: {

3311

if (msg.arg1 >= 0 && msg.arg1 <= NetworkAgent.MAX_TEARDOWN_DELAY_MS) {

3312

nai.teardownDelayMs = msg.arg1;

3313

} else {

3314

logwtf(nai.toShortString() + " set invalid teardown delay " + msg.arg1);

}

break;

}

case NetworkAgent.EVENT_LINGER_DURATION_CHANGED: {

3319

nai.setLingerDuration((int) arg.second);

break;

}

}

}

private boolean maybeHandleNetworkMonitorMessage(Message msg) {

switch (msg.what) {

default:

return false;

case EVENT_PROBE_STATUS_CHANGED: {

3330

final Integer netId = (Integer) msg.obj;

3331

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(netId);

if (nai == null) {

break;

}

final boolean probePrivateDnsCompleted =

3336

((msg.arg1 & NETWORK_VALIDATION_PROBE_PRIVDNS) != 0);

3337

final boolean privateDnsBroken =

3338

((msg.arg2 & NETWORK_VALIDATION_PROBE_PRIVDNS) == 0);

3339

if (probePrivateDnsCompleted) {

3340

if (nai.networkCapabilities.isPrivateDnsBroken() != privateDnsBroken) {

3341

nai.networkCapabilities.setPrivateDnsBroken(privateDnsBroken);

3342

updateCapabilitiesForNetwork(nai);

3343

}

3344

// Only show the notification when the private DNS is broken and the

3345

// PRIVATE_DNS_BROKEN notification hasn't shown since last valid.

3346

if (privateDnsBroken && !nai.networkAgentConfig.hasShownBroken) {

3347

showNetworkNotification(nai, NotificationType.PRIVATE_DNS_BROKEN);

3348

}

3349

nai.networkAgentConfig.hasShownBroken = privateDnsBroken;

3350

} else if (nai.networkCapabilities.isPrivateDnsBroken()) {

3351

// If probePrivateDnsCompleted is false but nai.networkCapabilities says

3352

// private DNS is broken, it means this network is being reevaluated.

3353

// Either probing private DNS is not necessary any more or it hasn't been

3354

// done yet. In either case, the networkCapabilities should be updated to

3355

// reflect the new status.

3356

nai.networkCapabilities.setPrivateDnsBroken(false);

3357

updateCapabilitiesForNetwork(nai);

3358

nai.networkAgentConfig.hasShownBroken = false;

}

break;

}

case EVENT_NETWORK_TESTED: {

3363

final NetworkTestedResults results = (NetworkTestedResults) msg.obj;

3364

3365

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(results.mNetId);

3366

if (nai == null) break;

3367

3368

handleNetworkTested(nai, results.mTestResult,

3369

(results.mRedirectUrl == null) ? "" : results.mRedirectUrl);

3370

break;

3371

}

3372

case EVENT_PROVISIONING_NOTIFICATION: {

3373

final int netId = msg.arg2;

3374

final boolean visible = toBool(msg.arg1);

3375

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(netId);

3376

// If captive portal status has changed, update capabilities or disconnect.

3377

if (nai != null && (visible != nai.lastCaptivePortalDetected)) {

3378

nai.lastCaptivePortalDetected = visible;

3379

nai.everCaptivePortalDetected |= visible;

3380

if (nai.lastCaptivePortalDetected &&

3381

ConnectivitySettingsManager.CAPTIVE_PORTAL_MODE_AVOID

3382

== getCaptivePortalMode()) {

3383

if (DBG) log("Avoiding captive portal network: " + nai.toShortString());

3384

nai.onPreventAutomaticReconnect();

3385

teardownUnneededNetwork(nai);

3386

break;

3387

}

3388

updateCapabilitiesForNetwork(nai);

3389

}

3390

if (!visible) {

3391

// Only clear SIGN_IN and NETWORK_SWITCH notifications here, or else other

3392

// notifications belong to the same network may be cleared unexpectedly.

3393

mNotifier.clearNotification(netId, NotificationType.SIGN_IN);

3394

mNotifier.clearNotification(netId, NotificationType.NETWORK_SWITCH);

3395

} else {

3396

if (nai == null) {

3397

loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor");

3398

break;

3399

}

3400

if (!nai.networkAgentConfig.provisioningNotificationDisabled) {

3401

mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null,

3402

(PendingIntent) msg.obj,

3403

nai.networkAgentConfig.explicitlySelected);

}

}

break;

}

case EVENT_PRIVATE_DNS_CONFIG_RESOLVED: {

3409

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(msg.arg2);

3410

if (nai == null) break;

3411

3412

updatePrivateDns(nai, (PrivateDnsConfig) msg.obj);

3413

break;

3414

}

3415

case EVENT_CAPPORT_DATA_CHANGED: {

3416

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(msg.arg2);

3417

if (nai == null) break;

3418

handleCapportApiDataUpdate(nai, (CaptivePortalData) msg.obj);

break;

}

}

return true;

}

private void handleNetworkTested(

3426

@NonNull NetworkAgentInfo nai, int testResult, @NonNull String redirectUrl) {

3427

final boolean wasPartial = nai.partialConnectivity;

3428

nai.partialConnectivity = ((testResult & NETWORK_VALIDATION_RESULT_PARTIAL) != 0);

3429

final boolean partialConnectivityChanged =

3430

(wasPartial != nai.partialConnectivity);

3431

3432

final boolean valid = ((testResult & NETWORK_VALIDATION_RESULT_VALID) != 0);

3433

final boolean wasValidated = nai.lastValidated;

3434

final boolean wasDefault = isDefaultNetwork(nai);

3435

3436

if (DBG) {

3437

final String logMsg = !TextUtils.isEmpty(redirectUrl)

3438

? " with redirect to " + redirectUrl

3439

: "";

3440

log(nai.toShortString() + " validation " + (valid ? "passed" : "failed") + logMsg);

3441

}

3442

if (valid != nai.lastValidated) {

3443

final int oldScore = nai.getCurrentScore();

3444

nai.lastValidated = valid;

3445

nai.everValidated |= valid;

3446

updateCapabilities(oldScore, nai, nai.networkCapabilities);

3447

if (valid) {

3448

handleFreshlyValidatedNetwork(nai);

3449

// Clear NO_INTERNET, PRIVATE_DNS_BROKEN, PARTIAL_CONNECTIVITY and

3450

// LOST_INTERNET notifications if network becomes valid.

3451

mNotifier.clearNotification(nai.network.getNetId(),

3452

NotificationType.NO_INTERNET);

3453

mNotifier.clearNotification(nai.network.getNetId(),

3454

NotificationType.LOST_INTERNET);

3455

mNotifier.clearNotification(nai.network.getNetId(),

3456

NotificationType.PARTIAL_CONNECTIVITY);

3457

mNotifier.clearNotification(nai.network.getNetId(),

3458

NotificationType.PRIVATE_DNS_BROKEN);

3459

// If network becomes valid, the hasShownBroken should be reset for

3460

// that network so that the notification will be fired when the private

3461

// DNS is broken again.

3462

nai.networkAgentConfig.hasShownBroken = false;

3463

}

3464

} else if (partialConnectivityChanged) {

3465

updateCapabilitiesForNetwork(nai);

3466

}

3467

updateInetCondition(nai);

3468

// Let the NetworkAgent know the state of its network

3469

// TODO: Evaluate to update partial connectivity to status to NetworkAgent.

3470

nai.onValidationStatusChanged(

3471

valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK,

3472

redirectUrl);

3473

3474

// If NetworkMonitor detects partial connectivity before

3475

// EVENT_PROMPT_UNVALIDATED arrives, show the partial connectivity notification

3476

// immediately. Re-notify partial connectivity silently if no internet

3477

// notification already there.

3478

if (!wasPartial && nai.partialConnectivity) {

3479

// Remove delayed message if there is a pending message.

3480

mHandler.removeMessages(EVENT_PROMPT_UNVALIDATED, nai.network);

3481

handlePromptUnvalidated(nai.network);

3482

}

3483

3484

if (wasValidated && !nai.lastValidated) {

3485

handleNetworkUnvalidated(nai);

}

}

private int getCaptivePortalMode() {

3490

return Settings.Global.getInt(mContext.getContentResolver(),

3491

ConnectivitySettingsManager.CAPTIVE_PORTAL_MODE,

3492

ConnectivitySettingsManager.CAPTIVE_PORTAL_MODE_PROMPT);

3493

}

3494

3495

private boolean maybeHandleNetworkAgentInfoMessage(Message msg) {

switch (msg.what) {

default:

return false;

case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: {

3500

NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj;

3501

if (nai != null && isLiveNetworkAgent(nai, msg.what)) {

3502

handleLingerComplete(nai);

}

break;

}

case NetworkAgentInfo.EVENT_AGENT_REGISTERED: {

3507

handleNetworkAgentRegistered(msg);

3508

break;

3509

}

3510

case NetworkAgentInfo.EVENT_AGENT_DISCONNECTED: {

3511

handleNetworkAgentDisconnected(msg);

break;

}

}

return true;

}

@Override

public void handleMessage(Message msg) {

3520

if (!maybeHandleNetworkMonitorMessage(msg)

3521

&& !maybeHandleNetworkAgentInfoMessage(msg)) {

3522

maybeHandleNetworkAgentMessage(msg);

}

}

}

private class NetworkMonitorCallbacks extends INetworkMonitorCallbacks.Stub {

3528

private final int mNetId;

3529

private final AutodestructReference<NetworkAgentInfo> mNai;

3530

3531

private NetworkMonitorCallbacks(NetworkAgentInfo nai) {

3532

mNetId = nai.network.getNetId();

3533

mNai = new AutodestructReference<>(nai);

}

@Override

public void onNetworkMonitorCreated(INetworkMonitor networkMonitor) {

3538

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT,

3539

new Pair<>(mNai.getAndDestroy(), networkMonitor)));

}

@Override

public void notifyNetworkTested(int testResult, @Nullable String redirectUrl) {

3544

// Legacy version of notifyNetworkTestedWithExtras.

3545

// Would only be called if the system has a NetworkStack module older than the

3546

// framework, which does not happen in practice.

3547

Log.wtf(TAG, "Deprecated notifyNetworkTested called: no action taken");

}

@Override

public void notifyNetworkTestedWithExtras(NetworkTestResultParcelable p) {

3552

// Notify mTrackerHandler and mConnectivityDiagnosticsHandler of the event. Both use

3553

// the same looper so messages will be processed in sequence.

3554

final Message msg = mTrackerHandler.obtainMessage(

3555

EVENT_NETWORK_TESTED,

3556

new NetworkTestedResults(

3557

mNetId, p.result, p.timestampMillis, p.redirectUrl));

3558

mTrackerHandler.sendMessage(msg);

3559

3560

// Invoke ConnectivityReport generation for this Network test event.

3561

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(mNetId);

3562

if (nai == null) return;

3563

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

3564

// NetworkMonitor reports the network validation result as a bitmask while

3565

// ConnectivityDiagnostics treats this value as an int. Convert the result to a single

3566

// logical value for ConnectivityDiagnostics.

3567

final int validationResult = networkMonitorValidationResultToConnDiagsValidationResult(

3568

p.result);

3569

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

3570

final PersistableBundle extras = new PersistableBundle();

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

3571

extras.putInt(KEY_NETWORK_VALIDATION_RESULT, validationResult);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

3572

extras.putInt(KEY_NETWORK_PROBES_SUCCEEDED_BITMASK, p.probesSucceeded);

3573

extras.putInt(KEY_NETWORK_PROBES_ATTEMPTED_BITMASK, p.probesAttempted);

3574

3575

ConnectivityReportEvent reportEvent =

3576

new ConnectivityReportEvent(p.timestampMillis, nai, extras);

3577

final Message m = mConnectivityDiagnosticsHandler.obtainMessage(

3578

ConnectivityDiagnosticsHandler.EVENT_NETWORK_TESTED, reportEvent);

3579

mConnectivityDiagnosticsHandler.sendMessage(m);

}

@Override

public void notifyPrivateDnsConfigResolved(PrivateDnsConfigParcel config) {

3584

mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(

3585

EVENT_PRIVATE_DNS_CONFIG_RESOLVED,

3586

0, mNetId, PrivateDnsConfig.fromParcel(config)));

}

@Override

public void notifyProbeStatusChanged(int probesCompleted, int probesSucceeded) {

3591

mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(

3592

EVENT_PROBE_STATUS_CHANGED,

3593

probesCompleted, probesSucceeded, new Integer(mNetId)));

}

@Override

public void notifyCaptivePortalDataChanged(CaptivePortalData data) {

3598

mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(

3599

EVENT_CAPPORT_DATA_CHANGED,

0, mNetId, data));

}

@Override

public void showProvisioningNotification(String action, String packageName) {

3605

final Intent intent = new Intent(action);

3606

intent.setPackage(packageName);

3607

3608

final PendingIntent pendingIntent;

3609

// Only the system server can register notifications with package "android"

3610

final long token = Binder.clearCallingIdentity();

3611

try {

3612

pendingIntent = PendingIntent.getBroadcast(

mContext,

0 /* requestCode */,

intent,

PendingIntent.FLAG_IMMUTABLE);

3617

} finally {

3618

Binder.restoreCallingIdentity(token);

3619

}

3620

mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(

3621

EVENT_PROVISIONING_NOTIFICATION, PROVISIONING_NOTIFICATION_SHOW,

3622

mNetId, pendingIntent));

}

@Override

public void hideProvisioningNotification() {

3627

mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(

3628

EVENT_PROVISIONING_NOTIFICATION, PROVISIONING_NOTIFICATION_HIDE, mNetId));

}

@Override

public void notifyDataStallSuspected(DataStallReportParcelable p) {

3633

ConnectivityService.this.notifyDataStallSuspected(p, mNetId);

}

@Override

public int getInterfaceVersion() {

return this.VERSION;

}

@Override

public String getInterfaceHash() {

return this.HASH;

}

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

3647

/**

3648

* Converts the given NetworkMonitor-specific validation result bitmask to a

3649

* ConnectivityDiagnostics-specific validation result int.

3650

*/

3651

private int networkMonitorValidationResultToConnDiagsValidationResult(int validationResult) {

3652

if ((validationResult & NETWORK_VALIDATION_RESULT_SKIPPED) != 0) {

3653

return ConnectivityReport.NETWORK_VALIDATION_RESULT_SKIPPED;

3654

}

3655

if ((validationResult & NETWORK_VALIDATION_RESULT_VALID) == 0) {

3656

return ConnectivityReport.NETWORK_VALIDATION_RESULT_INVALID;

3657

}

3658

return (validationResult & NETWORK_VALIDATION_RESULT_PARTIAL) != 0

3659

? ConnectivityReport.NETWORK_VALIDATION_RESULT_PARTIALLY_VALID

3660

: ConnectivityReport.NETWORK_VALIDATION_RESULT_VALID;

3661

}

3662

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

3663

private void notifyDataStallSuspected(DataStallReportParcelable p, int netId) {

3664

log("Data stall detected with methods: " + p.detectionMethod);

3665

3666

final PersistableBundle extras = new PersistableBundle();

3667

int detectionMethod = 0;

3668

if (hasDataStallDetectionMethod(p, DETECTION_METHOD_DNS_EVENTS)) {

3669

extras.putInt(KEY_DNS_CONSECUTIVE_TIMEOUTS, p.dnsConsecutiveTimeouts);

3670

detectionMethod |= DETECTION_METHOD_DNS_EVENTS;

3671

}

3672

if (hasDataStallDetectionMethod(p, DETECTION_METHOD_TCP_METRICS)) {

3673

extras.putInt(KEY_TCP_PACKET_FAIL_RATE, p.tcpPacketFailRate);

3674

extras.putInt(KEY_TCP_METRICS_COLLECTION_PERIOD_MILLIS,

3675

p.tcpMetricsCollectionPeriodMillis);

3676

detectionMethod |= DETECTION_METHOD_TCP_METRICS;

3677

}

3678

3679

final Message msg = mConnectivityDiagnosticsHandler.obtainMessage(

3680

ConnectivityDiagnosticsHandler.EVENT_DATA_STALL_SUSPECTED, detectionMethod, netId,

3681

new Pair<>(p.timestampMillis, extras));

3682

3683

// NetworkStateTrackerHandler currently doesn't take any actions based on data

3684

// stalls so send the message directly to ConnectivityDiagnosticsHandler and avoid

3685

// the cost of going through two handlers.

3686

mConnectivityDiagnosticsHandler.sendMessage(msg);

3687

}

3688

3689

private boolean hasDataStallDetectionMethod(DataStallReportParcelable p, int detectionMethod) {

3690

return (p.detectionMethod & detectionMethod) != 0;

3691

}

3692

3693

private boolean networkRequiresPrivateDnsValidation(NetworkAgentInfo nai) {

3694

return isPrivateDnsValidationRequired(nai.networkCapabilities);

3695

}

3696

3697

private void handleFreshlyValidatedNetwork(NetworkAgentInfo nai) {

3698

if (nai == null) return;

3699

// If the Private DNS mode is opportunistic, reprogram the DNS servers

3700

// in order to restart a validation pass from within netd.

3701

final PrivateDnsConfig cfg = mDnsManager.getPrivateDnsConfig();

3702

if (cfg.useTls && TextUtils.isEmpty(cfg.hostname)) {

3703

updateDnses(nai.linkProperties, null, nai.network.getNetId());

}

}

private void handlePrivateDnsSettingsChanged() {

3708

final PrivateDnsConfig cfg = mDnsManager.getPrivateDnsConfig();

3709

3710

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

3711

handlePerNetworkPrivateDnsConfig(nai, cfg);

3712

if (networkRequiresPrivateDnsValidation(nai)) {

3713

handleUpdateLinkProperties(nai, new LinkProperties(nai.linkProperties));

}

}

}

private void handlePerNetworkPrivateDnsConfig(NetworkAgentInfo nai, PrivateDnsConfig cfg) {

3719

// Private DNS only ever applies to networks that might provide

3720

// Internet access and therefore also require validation.

3721

if (!networkRequiresPrivateDnsValidation(nai)) return;

3722

3723

// Notify the NetworkAgentInfo/NetworkMonitor in case NetworkMonitor needs to cancel or

3724

// schedule DNS resolutions. If a DNS resolution is required the

3725

// result will be sent back to us.

3726

nai.networkMonitor().notifyPrivateDnsChanged(cfg.toParcel());

3727

3728

// With Private DNS bypass support, we can proceed to update the

3729

// Private DNS config immediately, even if we're in strict mode

3730

// and have not yet resolved the provider name into a set of IPs.

3731

updatePrivateDns(nai, cfg);

3732

}

3733

3734

private void updatePrivateDns(NetworkAgentInfo nai, PrivateDnsConfig newCfg) {

3735

mDnsManager.updatePrivateDns(nai.network, newCfg);

3736

updateDnses(nai.linkProperties, null, nai.network.getNetId());

3737

}

3738

3739

private void handlePrivateDnsValidationUpdate(PrivateDnsValidationUpdate update) {

3740

NetworkAgentInfo nai = getNetworkAgentInfoForNetId(update.netId);

if (nai == null) {

return;

}

mDnsManager.updatePrivateDnsValidation(update);

3745

handleUpdateLinkProperties(nai, new LinkProperties(nai.linkProperties));

3746

}

3747

3748

private void handleNat64PrefixEvent(int netId, int operation, String prefixAddress,

3749

int prefixLength) {

3750

NetworkAgentInfo nai = mNetworkForNetId.get(netId);

3751

if (nai == null) return;

3752

3753

log(String.format("NAT64 prefix changed on netId %d: operation=%d, %s/%d",

3754

netId, operation, prefixAddress, prefixLength));

3755

3756

IpPrefix prefix = null;

3757

if (operation == IDnsResolverUnsolicitedEventListener.PREFIX_OPERATION_ADDED) {

3758

try {

3759

prefix = new IpPrefix(InetAddresses.parseNumericAddress(prefixAddress),

3760

prefixLength);

3761

} catch (IllegalArgumentException e) {

3762

loge("Invalid NAT64 prefix " + prefixAddress + "/" + prefixLength);

return;

}

}

nai.clatd.setNat64PrefixFromDns(prefix);

3768

handleUpdateLinkProperties(nai, new LinkProperties(nai.linkProperties));

3769

}

3770

3771

private void handleCapportApiDataUpdate(@NonNull final NetworkAgentInfo nai,

3772

@Nullable final CaptivePortalData data) {

3773

nai.capportApiData = data;

3774

// CaptivePortalData will be merged into LinkProperties from NetworkAgentInfo

3775

handleUpdateLinkProperties(nai, new LinkProperties(nai.linkProperties));

}

/**

* Updates the inactivity state from the network requests inside the NAI.

3780

* @param nai the agent info to update

3781

* @param now the timestamp of the event causing this update

3782

* @return whether the network was inactive as a result of this update

3783

*/

3784

private boolean updateInactivityState(@NonNull final NetworkAgentInfo nai, final long now) {

3785

// 1. Update the inactivity timer. If it's changed, reschedule or cancel the alarm.

3786

// 2. If the network was inactive and there are now requests, unset inactive.

3787

// 3. If this network is unneeded (which implies it is not lingering), and there is at least

3788

// one lingered request, set inactive.

3789

nai.updateInactivityTimer();

3790

if (nai.isInactive() && nai.numForegroundNetworkRequests() > 0) {

3791

if (DBG) log("Unsetting inactive " + nai.toShortString());

3792

nai.unsetInactive();

3793

logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER);

3794

} else if (unneeded(nai, UnneededFor.LINGER) && nai.getInactivityExpiry() > 0) {

3795

if (DBG) {

3796

final int lingerTime = (int) (nai.getInactivityExpiry() - now);

3797

log("Setting inactive " + nai.toShortString() + " for " + lingerTime + "ms");

3798

}

3799

nai.setInactive();

3800

logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER);

return true;

}

return false;

}

private void handleNetworkAgentRegistered(Message msg) {

3807

final NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj;

3808

if (!mNetworkAgentInfos.contains(nai)) {

return;

}

if (msg.arg1 == NetworkAgentInfo.ARG_AGENT_SUCCESS) {

3813

if (VDBG) log("NetworkAgent registered");

3814

} else {

3815

loge("Error connecting NetworkAgent");

3816

mNetworkAgentInfos.remove(nai);

3817

if (nai != null) {

3818

final boolean wasDefault = isDefaultNetwork(nai);

3819

synchronized (mNetworkForNetId) {

3820

mNetworkForNetId.remove(nai.network.getNetId());

3821

}

3822

mNetIdManager.releaseNetId(nai.network.getNetId());

3823

// Just in case.

3824

mLegacyTypeTracker.remove(nai, wasDefault);

}

}

}

private void handleNetworkAgentDisconnected(Message msg) {

3830

NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj;

3831

if (mNetworkAgentInfos.contains(nai)) {

3832

disconnectAndDestroyNetwork(nai);

}

}

// Destroys a network, remove references to it from the internal state managed by

3837

// ConnectivityService, free its interfaces and clean up.

3838

// Must be called on the Handler thread.

3839

private void disconnectAndDestroyNetwork(NetworkAgentInfo nai) {

3840

ensureRunningOnConnectivityServiceThread();

3841

if (DBG) {

3842

log(nai.toShortString() + " disconnected, was satisfying " + nai.numNetworkRequests());

3843

}

3844

// Clear all notifications of this network.

3845

mNotifier.clearNotification(nai.network.getNetId());

3846

// A network agent has disconnected.

3847

// TODO - if we move the logic to the network agent (have them disconnect

3848

// because they lost all their requests or because their score isn't good)

3849

// then they would disconnect organically, report their new state and then

3850

// disconnect the channel.

3851

if (nai.networkInfo.isConnected()) {

3852

nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED,

3853

null, null);

3854

}

3855

final boolean wasDefault = isDefaultNetwork(nai);

3856

if (wasDefault) {

3857

mDefaultInetConditionPublished = 0;

3858

}

3859

notifyIfacesChangedForNetworkStats();

3860

// TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied

3861

// by other networks that are already connected. Perhaps that can be done by

3862

// sending all CALLBACK_LOST messages (for requests, not listens) at the end

3863

// of rematchAllNetworksAndRequests

3864

notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST);

3865

mKeepaliveTracker.handleStopAllKeepalives(nai, SocketKeepalive.ERROR_INVALID_NETWORK);

3866

3867

mQosCallbackTracker.handleNetworkReleased(nai.network);

3868

for (String iface : nai.linkProperties.getAllInterfaceNames()) {

3869

// Disable wakeup packet monitoring for each interface.

3870

wakeupModifyInterface(iface, nai.networkCapabilities, false);

3871

}

3872

nai.networkMonitor().notifyNetworkDisconnected();

3873

mNetworkAgentInfos.remove(nai);

3874

nai.clatd.update();

3875

synchronized (mNetworkForNetId) {

3876

// Remove the NetworkAgent, but don't mark the netId as

3877

// available until we've told netd to delete it below.

3878

mNetworkForNetId.remove(nai.network.getNetId());

3879

}

3880

propagateUnderlyingNetworkCapabilities(nai.network);

3881

// Remove all previously satisfied requests.

3882

for (int i = 0; i < nai.numNetworkRequests(); i++) {

3883

final NetworkRequest request = nai.requestAt(i);

3884

final NetworkRequestInfo nri = mNetworkRequests.get(request);

3885

final NetworkAgentInfo currentNetwork = nri.getSatisfier();

3886

if (currentNetwork != null

3887

&& currentNetwork.network.getNetId() == nai.network.getNetId()) {

3888

// uid rules for this network will be removed in destroyNativeNetwork(nai).

3889

// TODO : setting the satisfier is in fact the job of the rematch. Teach the

3890

// rematch not to keep disconnected agents instead of setting it here ; this

3891

// will also allow removing updating the offers below.

3892

nri.setSatisfier(null, null);

3893

for (final NetworkOfferInfo noi : mNetworkOffers) {

3894

informOffer(nri, noi.offer, mNetworkRanker);

3895

}

3896

3897

if (mDefaultRequest == nri) {

3898

// TODO : make battery stats aware that since 2013 multiple interfaces may be

3899

// active at the same time. For now keep calling this with the default

3900

// network, because while incorrect this is the closest to the old (also

3901

// incorrect) behavior.

3902

mNetworkActivityTracker.updateDataActivityTracking(

3903

null /* newNetwork */, nai);

3904

ensureNetworkTransitionWakelock(nai.toShortString());

}

}

}

nai.clearInactivityState();

3909

// TODO: mLegacyTypeTracker.remove seems redundant given there's a full rematch right after.

3910

// Currently, deleting it breaks tests that check for the default network disconnecting.

3911

// Find out why, fix the rematch code, and delete this.

3912

mLegacyTypeTracker.remove(nai, wasDefault);

3913

rematchAllNetworksAndRequests();

3914

mLingerMonitor.noteDisconnect(nai);

3915

3916

// Immediate teardown.

3917

if (nai.teardownDelayMs == 0) {

destroyNetwork(nai);

return;

}

// Delayed teardown.

try {

mNetd.networkSetPermissionForNetwork(nai.network.netId, INetd.PERMISSION_SYSTEM);

3925

} catch (RemoteException e) {

3926

Log.d(TAG, "Error marking network restricted during teardown: " + e);

3927

}

3928

mHandler.postDelayed(() -> destroyNetwork(nai), nai.teardownDelayMs);

3929

}

3930

3931

private void destroyNetwork(NetworkAgentInfo nai) {

3932

if (nai.created) {

3933

// Tell netd to clean up the configuration for this network

3934

// (routing rules, DNS, etc).

3935

// This may be slow as it requires a lot of netd shelling out to ip and

3936

// ip[6]tables to flush routes and remove the incoming packet mark rule, so do it

3937

// after we've rematched networks with requests (which might change the default

3938

// network or service a new request from an app), so network traffic isn't interrupted

3939

// for an unnecessarily long time.

3940

destroyNativeNetwork(nai);

3941

mDnsManager.removeNetwork(nai.network);

3942

}

3943

mNetIdManager.releaseNetId(nai.network.getNetId());

3944

nai.onNetworkDestroyed();

3945

}

3946

3947

private boolean createNativeNetwork(@NonNull NetworkAgentInfo nai) {

3948

try {

3949

// This should never fail. Specifying an already in use NetID will cause failure.

3950

final NativeNetworkConfig config;

3951

if (nai.isVPN()) {

3952

if (getVpnType(nai) == VpnManager.TYPE_VPN_NONE) {

3953

Log.wtf(TAG, "Unable to get VPN type from network " + nai.toShortString());

3954

return false;

3955

}

3956

config = new NativeNetworkConfig(nai.network.getNetId(), NativeNetworkType.VIRTUAL,

3957

INetd.PERMISSION_NONE,

3958

(nai.networkAgentConfig == null || !nai.networkAgentConfig.allowBypass),

3959

getVpnType(nai));

3960

} else {

3961

config = new NativeNetworkConfig(nai.network.getNetId(), NativeNetworkType.PHYSICAL,

3962

getNetworkPermission(nai.networkCapabilities), /*secure=*/ false,

3963

VpnManager.TYPE_VPN_NONE);

3964

}

3965

mNetd.networkCreate(config);

3966

mDnsResolver.createNetworkCache(nai.network.getNetId());

3967

mDnsManager.updateTransportsForNetwork(nai.network.getNetId(),

3968

nai.networkCapabilities.getTransportTypes());

3969

return true;

3970

} catch (RemoteException | ServiceSpecificException e) {

3971

loge("Error creating network " + nai.toShortString() + ": " + e.getMessage());

return false;

}

}

private void destroyNativeNetwork(@NonNull NetworkAgentInfo nai) {

3977

try {

3978

mNetd.networkDestroy(nai.network.getNetId());

3979

} catch (RemoteException | ServiceSpecificException e) {

3980

loge("Exception destroying network(networkDestroy): " + e);

3981

}

3982

try {

3983

mDnsResolver.destroyNetworkCache(nai.network.getNetId());

3984

} catch (RemoteException | ServiceSpecificException e) {

3985

loge("Exception destroying network: " + e);

}

}

// If this method proves to be too slow then we can maintain a separate

3990

// pendingIntent => NetworkRequestInfo map.

3991

// This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo.

3992

private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) {

3993

for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) {

3994

PendingIntent existingPendingIntent = entry.getValue().mPendingIntent;

3995

if (existingPendingIntent != null &&

Remi NGUYEN VAN

18a979f

2021-06-04 18:51:25 +0900

[diff] [blame]

3996

mDeps.intentFilterEquals(existingPendingIntent, pendingIntent)) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

3997

return entry.getValue();

}

}

return null;

}

private void handleRegisterNetworkRequestWithIntent(@NonNull final Message msg) {

4004

final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj);

4005

// handleRegisterNetworkRequestWithIntent() doesn't apply to multilayer requests.

4006

ensureNotMultilayerRequest(nri, "handleRegisterNetworkRequestWithIntent");

4007

final NetworkRequestInfo existingRequest =

4008

findExistingNetworkRequestInfo(nri.mPendingIntent);

4009

if (existingRequest != null) { // remove the existing request.

4010

if (DBG) {

4011

log("Replacing " + existingRequest.mRequests.get(0) + " with "

4012

+ nri.mRequests.get(0) + " because their intents matched.");

4013

}

4014

handleReleaseNetworkRequest(existingRequest.mRequests.get(0), mDeps.getCallingUid(),

4015

/* callOnUnavailable */ false);

4016

}

4017

handleRegisterNetworkRequest(nri);

4018

}

4019

4020

private void handleRegisterNetworkRequest(@NonNull final NetworkRequestInfo nri) {

4021

handleRegisterNetworkRequests(Collections.singleton(nri));

4022

}

4023

4024

private void handleRegisterNetworkRequests(@NonNull final Set<NetworkRequestInfo> nris) {

4025

ensureRunningOnConnectivityServiceThread();

4026

for (final NetworkRequestInfo nri : nris) {

4027

mNetworkRequestInfoLogs.log("REGISTER " + nri);

4028

for (final NetworkRequest req : nri.mRequests) {

4029

mNetworkRequests.put(req, nri);

4030

// TODO: Consider update signal strength for other types.

4031

if (req.isListen()) {

4032

for (final NetworkAgentInfo network : mNetworkAgentInfos) {

4033

if (req.networkCapabilities.hasSignalStrength()

4034

&& network.satisfiesImmutableCapabilitiesOf(req)) {

4035

updateSignalStrengthThresholds(network, "REGISTER", req);

}

}

}

}

// If this NRI has a satisfier already, it is replacing an older request that

4041

// has been removed. Track it.

4042

final NetworkRequest activeRequest = nri.getActiveRequest();

4043

if (null != activeRequest) {

4044

// If there is an active request, then for sure there is a satisfier.

4045

nri.getSatisfier().addRequest(activeRequest);

}

}

rematchAllNetworksAndRequests();

4050

4051

// Requests that have not been matched to a network will not have been sent to the

4052

// providers, because the old satisfier and the new satisfier are the same (null in this

4053

// case). Send these requests to the providers.

4054

for (final NetworkRequestInfo nri : nris) {

4055

for (final NetworkOfferInfo noi : mNetworkOffers) {

4056

informOffer(nri, noi.offer, mNetworkRanker);

}

}

}

private void handleReleaseNetworkRequestWithIntent(@NonNull final PendingIntent pendingIntent,

4062

final int callingUid) {

4063

final NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent);

4064

if (nri != null) {

4065

// handleReleaseNetworkRequestWithIntent() paths don't apply to multilayer requests.

4066

ensureNotMultilayerRequest(nri, "handleReleaseNetworkRequestWithIntent");

4067

handleReleaseNetworkRequest(

4068

nri.mRequests.get(0),

4069

callingUid,

4070

/* callOnUnavailable */ false);

}

}

// Determines whether the network is the best (or could become the best, if it validated), for

4075

// none of a particular type of NetworkRequests. The type of NetworkRequests considered depends

4076

// on the value of reason:

4077

//

4078

// - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason,

4079

// then it should be torn down.

4080

// - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason,

4081

// then it should be lingered.

4082

private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) {

4083

ensureRunningOnConnectivityServiceThread();

4084

4085

if (!nai.everConnected || nai.isVPN() || nai.isInactive()

4086

|| nai.getScore().getKeepConnectedReason() != NetworkScore.KEEP_CONNECTED_NONE) {

return false;

}

final int numRequests;

4091

switch (reason) {

4092

case TEARDOWN:

4093

numRequests = nai.numRequestNetworkRequests();

4094

break;

4095

case LINGER:

4096

numRequests = nai.numForegroundNetworkRequests();

4097

break;

4098

default:

4099

Log.wtf(TAG, "Invalid reason. Cannot happen.");

return true;

}

if (numRequests > 0) return false;

4104

4105

for (NetworkRequestInfo nri : mNetworkRequests.values()) {

4106

if (reason == UnneededFor.LINGER

4107

&& !nri.isMultilayerRequest()

4108

&& nri.mRequests.get(0).isBackgroundRequest()) {

4109

// Background requests don't affect lingering.

continue;

}

if (isNetworkPotentialSatisfier(nai, nri)) {

return false;

}

}

return true;

}

private boolean isNetworkPotentialSatisfier(

4121

@NonNull final NetworkAgentInfo candidate, @NonNull final NetworkRequestInfo nri) {

4122

// listen requests won't keep up a network satisfying it. If this is not a multilayer

4123

// request, return immediately. For multilayer requests, check to see if any of the

4124

// multilayer requests may have a potential satisfier.

4125

if (!nri.isMultilayerRequest() && (nri.mRequests.get(0).isListen()

4126

|| nri.mRequests.get(0).isListenForBest())) {

4127

return false;

4128

}

4129

for (final NetworkRequest req : nri.mRequests) {

4130

// This multilayer listen request is satisfied therefore no further requests need to be

4131

// evaluated deeming this network not a potential satisfier.

4132

if ((req.isListen() || req.isListenForBest()) && nri.getActiveRequest() == req) {

4133

return false;

4134

}

4135

// As non-multilayer listen requests have already returned, the below would only happen

4136

// for a multilayer request therefore continue to the next request if available.

4137

if (req.isListen() || req.isListenForBest()) {

4138

continue;

4139

}

4140

// If this Network is already the highest scoring Network for a request, or if

4141

// there is hope for it to become one if it validated, then it is needed.

4142

if (candidate.satisfies(req)) {

4143

// As soon as a network is found that satisfies a request, return. Specifically for

4144

// multilayer requests, returning as soon as a NetworkAgentInfo satisfies a request

4145

// is important so as to not evaluate lower priority requests further in

4146

// nri.mRequests.

4147

final NetworkAgentInfo champion = req.equals(nri.getActiveRequest())

4148

? nri.getSatisfier() : null;

4149

// Note that this catches two important cases:

4150

// 1. Unvalidated cellular will not be reaped when unvalidated WiFi

4151

// is currently satisfying the request. This is desirable when

4152

// cellular ends up validating but WiFi does not.

4153

// 2. Unvalidated WiFi will not be reaped when validated cellular

4154

// is currently satisfying the request. This is desirable when

4155

// WiFi ends up validating and out scoring cellular.

4156

return mNetworkRanker.mightBeat(req, champion, candidate.getValidatedScoreable());

}

}

return false;

}

private NetworkRequestInfo getNriForAppRequest(

4164

NetworkRequest request, int callingUid, String requestedOperation) {

4165

// Looking up the app passed param request in mRequests isn't possible since it may return

4166

// null for a request managed by a per-app default. Therefore use getNriForAppRequest() to

4167

// do the lookup since that will also find per-app default managed requests.

4168

// Additionally, this lookup needs to be relatively fast (hence the lookup optimization)

4169

// to avoid potential race conditions when validating a package->uid mapping when sending

4170

// the callback on the very low-chance that an application shuts down prior to the callback

4171

// being sent.

4172

final NetworkRequestInfo nri = mNetworkRequests.get(request) != null

4173

? mNetworkRequests.get(request) : getNriForAppRequest(request);

4174

4175

if (nri != null) {

4176

if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) {

4177

log(String.format("UID %d attempted to %s for unowned request %s",

4178

callingUid, requestedOperation, nri));

return null;

}

}

return nri;

}

private void ensureNotMultilayerRequest(@NonNull final NetworkRequestInfo nri,

4187

final String callingMethod) {

4188

if (nri.isMultilayerRequest()) {

4189

throw new IllegalStateException(

4190

callingMethod + " does not support multilayer requests.");

}

}

private void handleTimedOutNetworkRequest(@NonNull final NetworkRequestInfo nri) {

4195

ensureRunningOnConnectivityServiceThread();

4196

// handleTimedOutNetworkRequest() is part of the requestNetwork() flow which works off of a

4197

// single NetworkRequest and thus does not apply to multilayer requests.

4198

ensureNotMultilayerRequest(nri, "handleTimedOutNetworkRequest");

4199

if (mNetworkRequests.get(nri.mRequests.get(0)) == null) {

4200

return;

4201

}

4202

if (nri.isBeingSatisfied()) {

4203

return;

4204

}

4205

if (VDBG || (DBG && nri.mRequests.get(0).isRequest())) {

4206

log("releasing " + nri.mRequests.get(0) + " (timeout)");

4207

}

4208

handleRemoveNetworkRequest(nri);

4209

callCallbackForRequest(

4210

nri, null, ConnectivityManager.CALLBACK_UNAVAIL, 0);

4211

}

4212

4213

private void handleReleaseNetworkRequest(@NonNull final NetworkRequest request,

4214

final int callingUid,

4215

final boolean callOnUnavailable) {

4216

final NetworkRequestInfo nri =

4217

getNriForAppRequest(request, callingUid, "release NetworkRequest");

if (nri == null) {

return;

}

if (VDBG || (DBG && request.isRequest())) {

4222

log("releasing " + request + " (release request)");

4223

}

4224

handleRemoveNetworkRequest(nri);

4225

if (callOnUnavailable) {

4226

callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_UNAVAIL, 0);

}

}

private void handleRemoveNetworkRequest(@NonNull final NetworkRequestInfo nri) {

4231

ensureRunningOnConnectivityServiceThread();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4232

for (final NetworkRequest req : nri.mRequests) {

James Mattis

8f03680

2021-06-20 16:26:01 -0700

[diff] [blame]

4233

if (null == mNetworkRequests.remove(req)) {

4234

logw("Attempted removal of untracked request " + req + " for nri " + nri);

4235

continue;

4236

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4237

if (req.isListen()) {

4238

removeListenRequestFromNetworks(req);

4239

}

4240

}

James Mattis

8f03680

2021-06-20 16:26:01 -0700

[diff] [blame]

4241

nri.unlinkDeathRecipient();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4242

if (mDefaultNetworkRequests.remove(nri)) {

4243

// If this request was one of the defaults, then the UID rules need to be updated

4244

// WARNING : if the app(s) for which this network request is the default are doing

4245

// traffic, this will kill their connected sockets, even if an equivalent request

4246

// is going to be reinstated right away ; unconnected traffic will go on the default

4247

// until the new default is set, which will happen very soon.

4248

// TODO : The only way out of this is to diff old defaults and new defaults, and only

4249

// remove ranges for those requests that won't have a replacement

4250

final NetworkAgentInfo satisfier = nri.getSatisfier();

4251

if (null != satisfier) {

4252

try {

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

4253

mNetd.networkRemoveUidRangesParcel(new NativeUidRangeConfig(

4254

satisfier.network.getNetId(),

4255

toUidRangeStableParcels(nri.getUids()),

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

4256

nri.getPreferenceOrderForNetd()));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4257

} catch (RemoteException e) {

4258

loge("Exception setting network preference default network", e);

}

}

}

nri.decrementRequestCount();

4263

mNetworkRequestInfoLogs.log("RELEASE " + nri);

4264

4265

if (null != nri.getActiveRequest()) {

4266

if (!nri.getActiveRequest().isListen()) {

4267

removeSatisfiedNetworkRequestFromNetwork(nri);

4268

} else {

4269

nri.setSatisfier(null, null);

}

}

// For all outstanding offers, cancel any of the layers of this NRI that used to be

4274

// needed for this offer.

4275

for (final NetworkOfferInfo noi : mNetworkOffers) {

4276

for (final NetworkRequest req : nri.mRequests) {

4277

if (req.isRequest() && noi.offer.neededFor(req)) {

4278

noi.offer.onNetworkUnneeded(req);

}

}

}

}

private void handleRemoveNetworkRequests(@NonNull final Set<NetworkRequestInfo> nris) {

4285

for (final NetworkRequestInfo nri : nris) {

4286

if (mDefaultRequest == nri) {

4287

// Make sure we never remove the default request.

4288

continue;

4289

}

4290

handleRemoveNetworkRequest(nri);

}

}

private void removeListenRequestFromNetworks(@NonNull final NetworkRequest req) {

4295

// listens don't have a singular affected Network. Check all networks to see

4296

// if this listen request applies and remove it.

4297

for (final NetworkAgentInfo nai : mNetworkAgentInfos) {

4298

nai.removeRequest(req.requestId);

4299

if (req.networkCapabilities.hasSignalStrength()

4300

&& nai.satisfiesImmutableCapabilitiesOf(req)) {

4301

updateSignalStrengthThresholds(nai, "RELEASE", req);

}

}

}

/**

* Remove a NetworkRequestInfo's satisfied request from its 'satisfier' (NetworkAgentInfo) and

4308

* manage the necessary upkeep (linger, teardown networks, etc.) when doing so.

4309

* @param nri the NetworkRequestInfo to disassociate from its current NetworkAgentInfo

4310

*/

4311

private void removeSatisfiedNetworkRequestFromNetwork(@NonNull final NetworkRequestInfo nri) {

4312

boolean wasKept = false;

4313

final NetworkAgentInfo nai = nri.getSatisfier();

4314

if (nai != null) {

4315

final int requestLegacyType = nri.getActiveRequest().legacyType;

4316

final boolean wasBackgroundNetwork = nai.isBackgroundNetwork();

4317

nai.removeRequest(nri.getActiveRequest().requestId);

4318

if (VDBG || DDBG) {

4319

log(" Removing from current network " + nai.toShortString()

4320

+ ", leaving " + nai.numNetworkRequests() + " requests.");

4321

}

4322

// If there are still lingered requests on this network, don't tear it down,

4323

// but resume lingering instead.

4324

final long now = SystemClock.elapsedRealtime();

4325

if (updateInactivityState(nai, now)) {

4326

notifyNetworkLosing(nai, now);

4327

}

4328

if (unneeded(nai, UnneededFor.TEARDOWN)) {

4329

if (DBG) log("no live requests for " + nai.toShortString() + "; disconnecting");

4330

teardownUnneededNetwork(nai);

} else {

wasKept = true;

}

nri.setSatisfier(null, null);

4335

if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) {

4336

// Went from foreground to background.

4337

updateCapabilitiesForNetwork(nai);

4338

}

4339

4340

// Maintain the illusion. When this request arrived, we might have pretended

4341

// that a network connected to serve it, even though the network was already

4342

// connected. Now that this request has gone away, we might have to pretend

4343

// that the network disconnected. LegacyTypeTracker will generate that

4344

// phantom disconnect for this type.

4345

if (requestLegacyType != TYPE_NONE) {

4346

boolean doRemove = true;

4347

if (wasKept) {

4348

// check if any of the remaining requests for this network are for the

4349

// same legacy type - if so, don't remove the nai

4350

for (int i = 0; i < nai.numNetworkRequests(); i++) {

4351

NetworkRequest otherRequest = nai.requestAt(i);

4352

if (otherRequest.legacyType == requestLegacyType

4353

&& otherRequest.isRequest()) {

4354

if (DBG) log(" still have other legacy request - leaving");

doRemove = false;

}

}

}

if (doRemove) {

mLegacyTypeTracker.remove(requestLegacyType, nai, false);

}

}

}

}

private PerUidCounter getRequestCounter(NetworkRequestInfo nri) {

4368

return checkAnyPermissionOf(

4369

nri.mPid, nri.mUid, NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK)

4370

? mSystemNetworkRequestCounter : mNetworkRequestCounter;

}

@Override

public void setAcceptUnvalidated(Network network, boolean accept, boolean always) {

4375

enforceNetworkStackSettingsOrSetup();

4376

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED,

4377

encodeBool(accept), encodeBool(always), network));

}

@Override

public void setAcceptPartialConnectivity(Network network, boolean accept, boolean always) {

4382

enforceNetworkStackSettingsOrSetup();

4383

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_PARTIAL_CONNECTIVITY,

4384

encodeBool(accept), encodeBool(always), network));

}

@Override

public void setAvoidUnvalidated(Network network) {

4389

enforceNetworkStackSettingsOrSetup();

4390

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_AVOID_UNVALIDATED, network));

4391

}

4392

Chiachang Wang

2021-06-17 22:11:30 +0800

[diff] [blame]

4393

@Override

4394

public void setTestAllowBadWifiUntil(long timeMs) {

4395

enforceSettingsPermission();

4396

if (!Build.isDebuggable()) {

4397

throw new IllegalStateException("Does not support in non-debuggable build");

4398

}

4399

4400

if (timeMs > System.currentTimeMillis() + MAX_TEST_ALLOW_BAD_WIFI_UNTIL_MS) {

4401

throw new IllegalArgumentException("It should not exceed "

4402

+ MAX_TEST_ALLOW_BAD_WIFI_UNTIL_MS + "ms from now");

4403

}

4404

4405

mHandler.sendMessage(

4406

mHandler.obtainMessage(EVENT_SET_TEST_ALLOW_BAD_WIFI_UNTIL, timeMs));

4407

}

4408

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4409

private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) {

4410

if (DBG) log("handleSetAcceptUnvalidated network=" + network +

4411

" accept=" + accept + " always=" + always);

4412

4413

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

if (nai == null) {

// Nothing to do.

return;

}

if (nai.everValidated) {

4420

// The network validated while the dialog box was up. Take no action.

return;

}

if (!nai.networkAgentConfig.explicitlySelected) {

4425

Log.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network");

4426

}

4427

4428

if (accept != nai.networkAgentConfig.acceptUnvalidated) {

4429

nai.networkAgentConfig.acceptUnvalidated = accept;

4430

// If network becomes partial connectivity and user already accepted to use this

4431

// network, we should respect the user's option and don't need to popup the

4432

// PARTIAL_CONNECTIVITY notification to user again.

4433

nai.networkAgentConfig.acceptPartialConnectivity = accept;

4434

nai.updateScoreForNetworkAgentUpdate();

4435

rematchAllNetworksAndRequests();

}

if (always) {

nai.onSaveAcceptUnvalidated(accept);

}

if (!accept) {

// Tell the NetworkAgent to not automatically reconnect to the network.

4444

nai.onPreventAutomaticReconnect();

4445

// Teardown the network.

4446

teardownUnneededNetwork(nai);

}

}

private void handleSetAcceptPartialConnectivity(Network network, boolean accept,

4452

boolean always) {

4453

if (DBG) {

4454

log("handleSetAcceptPartialConnectivity network=" + network + " accept=" + accept

4455

+ " always=" + always);

4456

}

4457

4458

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

if (nai == null) {

// Nothing to do.

return;

}

if (nai.lastValidated) {

4465

// The network validated while the dialog box was up. Take no action.

return;

}

if (accept != nai.networkAgentConfig.acceptPartialConnectivity) {

4470

nai.networkAgentConfig.acceptPartialConnectivity = accept;

4471

}

4472

4473

// TODO: Use the current design or save the user choice into IpMemoryStore.

4474

if (always) {

4475

nai.onSaveAcceptUnvalidated(accept);

}

if (!accept) {

// Tell the NetworkAgent to not automatically reconnect to the network.

4480

nai.onPreventAutomaticReconnect();

4481

// Tear down the network.

4482

teardownUnneededNetwork(nai);

4483

} else {

4484

// Inform NetworkMonitor that partial connectivity is acceptable. This will likely

4485

// result in a partial connectivity result which will be processed by

4486

// maybeHandleNetworkMonitorMessage.

4487

//

4488

// TODO: NetworkMonitor does not refer to the "never ask again" bit. The bit is stored

4489

// per network. Therefore, NetworkMonitor may still do https probe.

4490

nai.networkMonitor().setAcceptPartialConnectivity();

}

}

private void handleSetAvoidUnvalidated(Network network) {

4495

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

4496

if (nai == null || nai.lastValidated) {

4497

// Nothing to do. The network either disconnected or revalidated.

4498

return;

4499

}

4500

if (!nai.avoidUnvalidated) {

4501

nai.avoidUnvalidated = true;

4502

nai.updateScoreForNetworkAgentUpdate();

4503

rematchAllNetworksAndRequests();

}

}

private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) {

4508

if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network);

4509

mHandler.sendMessageDelayed(

4510

mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network),

4511

PROMPT_UNVALIDATED_DELAY_MS);

}

@Override

public void startCaptivePortalApp(Network network) {

4516

enforceNetworkStackOrSettingsPermission();

4517

mHandler.post(() -> {

4518

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

4519

if (nai == null) return;

4520

if (!nai.networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL)) return;

4521

nai.networkMonitor().launchCaptivePortalApp();

});

}

/**

* NetworkStack endpoint to start the captive portal app. The NetworkStack needs to use this

4527

* endpoint as it does not have INTERACT_ACROSS_USERS_FULL itself.

4528

* @param network Network on which the captive portal was detected.

4529

* @param appExtras Bundle to use as intent extras for the captive portal application.

4530

* Must be treated as opaque to avoid preventing the captive portal app to

4531

* update its arguments.

4532

*/

4533

@Override

4534

public void startCaptivePortalAppInternal(Network network, Bundle appExtras) {

4535

mContext.enforceCallingOrSelfPermission(NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,

4536

"ConnectivityService");

4537

4538

final Intent appIntent = new Intent(ConnectivityManager.ACTION_CAPTIVE_PORTAL_SIGN_IN);

4539

appIntent.putExtras(appExtras);

4540

appIntent.putExtra(ConnectivityManager.EXTRA_CAPTIVE_PORTAL,

4541

new CaptivePortal(new CaptivePortalImpl(network).asBinder()));

4542

appIntent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT | Intent.FLAG_ACTIVITY_NEW_TASK);

4543

4544

final long token = Binder.clearCallingIdentity();

4545

try {

4546

mContext.startActivityAsUser(appIntent, UserHandle.CURRENT);

4547

} finally {

4548

Binder.restoreCallingIdentity(token);

}

}

private class CaptivePortalImpl extends ICaptivePortal.Stub {

4553

private final Network mNetwork;

4554

4555

private CaptivePortalImpl(Network network) {

mNetwork = network;

}

@Override

public void appResponse(final int response) {

4561

if (response == CaptivePortal.APP_RETURN_WANTED_AS_IS) {

4562

enforceSettingsPermission();

4563

}

4564

4565

final NetworkMonitorManager nm = getNetworkMonitorManager(mNetwork);

4566

if (nm == null) return;

4567

nm.notifyCaptivePortalAppFinished(response);

}

@Override

public void appRequest(final int request) {

4572

final NetworkMonitorManager nm = getNetworkMonitorManager(mNetwork);

4573

if (nm == null) return;

4574

4575

if (request == CaptivePortal.APP_REQUEST_REEVALUATION_REQUIRED) {

4576

checkNetworkStackPermission();

4577

nm.forceReevaluation(mDeps.getCallingUid());

}

}

@Nullable

private NetworkMonitorManager getNetworkMonitorManager(final Network network) {

4583

// getNetworkAgentInfoForNetwork is thread-safe

4584

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

4585

if (nai == null) return null;

4586

4587

// nai.networkMonitor() is thread-safe

4588

return nai.networkMonitor();

}

}

public boolean avoidBadWifi() {

4593

return mMultinetworkPolicyTracker.getAvoidBadWifi();

}

/**

* Return whether the device should maintain continuous, working connectivity by switching away

4598

* from WiFi networks having no connectivity.

4599

* @see MultinetworkPolicyTracker#getAvoidBadWifi()

4600

*/

4601

public boolean shouldAvoidBadWifi() {

4602

if (!checkNetworkStackPermission()) {

4603

throw new SecurityException("avoidBadWifi requires NETWORK_STACK permission");

4604

}

4605

return avoidBadWifi();

4606

}

4607

4608

private void updateAvoidBadWifi() {

4609

for (final NetworkAgentInfo nai : mNetworkAgentInfos) {

4610

nai.updateScoreForNetworkAgentUpdate();

4611

}

4612

rematchAllNetworksAndRequests();

4613

}

4614

4615

// TODO: Evaluate whether this is of interest to other consumers of

4616

// MultinetworkPolicyTracker and worth moving out of here.

4617

private void dumpAvoidBadWifiSettings(IndentingPrintWriter pw) {

4618

final boolean configRestrict = mMultinetworkPolicyTracker.configRestrictsAvoidBadWifi();

4619

if (!configRestrict) {

4620

pw.println("Bad Wi-Fi avoidance: unrestricted");

return;

}

pw.println("Bad Wi-Fi avoidance: " + avoidBadWifi());

4625

pw.increaseIndent();

4626

pw.println("Config restrict: " + configRestrict);

4627

4628

final String value = mMultinetworkPolicyTracker.getAvoidBadWifiSetting();

4629

String description;

4630

// Can't use a switch statement because strings are legal case labels, but null is not.

4631

if ("0".equals(value)) {

4632

description = "get stuck";

4633

} else if (value == null) {

4634

description = "prompt";

4635

} else if ("1".equals(value)) {

4636

description = "avoid";

4637

} else {

4638

description = value + " (?)";

4639

}

4640

pw.println("User setting: " + description);

4641

pw.println("Network overrides:");

4642

pw.increaseIndent();

4643

for (NetworkAgentInfo nai : networksSortedById()) {

4644

if (nai.avoidUnvalidated) {

4645

pw.println(nai.toShortString());

}

}

pw.decreaseIndent();

pw.decreaseIndent();

}

// TODO: This method is copied from TetheringNotificationUpdater. Should have a utility class to

4653

// unify the method.

4654

private static @NonNull String getSettingsPackageName(@NonNull final PackageManager pm) {

4655

final Intent settingsIntent = new Intent(Settings.ACTION_SETTINGS);

4656

final ComponentName settingsComponent = settingsIntent.resolveActivity(pm);

4657

return settingsComponent != null

4658

? settingsComponent.getPackageName() : "com.android.settings";

4659

}

4660

4661

private void showNetworkNotification(NetworkAgentInfo nai, NotificationType type) {

4662

final String action;

4663

final boolean highPriority;

4664

switch (type) {

4665

case NO_INTERNET:

4666

action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED;

4667

// High priority because it is only displayed for explicitly selected networks.

4668

highPriority = true;

4669

break;

4670

case PRIVATE_DNS_BROKEN:

4671

action = Settings.ACTION_WIRELESS_SETTINGS;

4672

// High priority because we should let user know why there is no internet.

highPriority = true;

break;

case LOST_INTERNET:

action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION;

4677

// High priority because it could help the user avoid unexpected data usage.

4678

highPriority = true;

4679

break;

4680

case PARTIAL_CONNECTIVITY:

4681

action = ConnectivityManager.ACTION_PROMPT_PARTIAL_CONNECTIVITY;

4682

// Don't bother the user with a high-priority notification if the network was not

4683

// explicitly selected by the user.

4684

highPriority = nai.networkAgentConfig.explicitlySelected;

4685

break;

4686

default:

4687

Log.wtf(TAG, "Unknown notification type " + type);

return;

}

Intent intent = new Intent(action);

4692

if (type != NotificationType.PRIVATE_DNS_BROKEN) {

4693

intent.putExtra(ConnectivityManager.EXTRA_NETWORK, nai.network);

4694

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

4695

// Some OEMs have their own Settings package. Thus, need to get the current using

4696

// Settings package name instead of just use default name "com.android.settings".

4697

final String settingsPkgName = getSettingsPackageName(mContext.getPackageManager());

4698

intent.setClassName(settingsPkgName,

4699

settingsPkgName + ".wifi.WifiNoInternetDialog");

4700

}

4701

4702

PendingIntent pendingIntent = PendingIntent.getActivity(

4703

mContext.createContextAsUser(UserHandle.CURRENT, 0 /* flags */),

4704

0 /* requestCode */,

4705

intent,

4706

PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_IMMUTABLE);

4707

4708

mNotifier.showNotification(

4709

nai.network.getNetId(), type, nai, null, pendingIntent, highPriority);

4710

}

4711

4712

private boolean shouldPromptUnvalidated(NetworkAgentInfo nai) {

4713

// Don't prompt if the network is validated, and don't prompt on captive portals

4714

// because we're already prompting the user to sign in.

4715

if (nai.everValidated || nai.everCaptivePortalDetected) {

return false;

}

// If a network has partial connectivity, always prompt unless the user has already accepted

4720

// partial connectivity and selected don't ask again. This ensures that if the device

4721

// automatically connects to a network that has partial Internet access, the user will

4722

// always be able to use it, either because they've already chosen "don't ask again" or

4723

// because we have prompt them.

4724

if (nai.partialConnectivity && !nai.networkAgentConfig.acceptPartialConnectivity) {

return true;

}

// If a network has no Internet access, only prompt if the network was explicitly selected

4729

// and if the user has not already told us to use the network regardless of whether it

4730

// validated or not.

4731

if (nai.networkAgentConfig.explicitlySelected

4732

&& !nai.networkAgentConfig.acceptUnvalidated) {

return true;

}

return false;

}

private void handlePromptUnvalidated(Network network) {

4740

if (VDBG || DDBG) log("handlePromptUnvalidated " + network);

4741

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

4742

4743

if (nai == null || !shouldPromptUnvalidated(nai)) {

return;

}

// Stop automatically reconnecting to this network in the future. Automatically connecting

4748

// to a network that provides no or limited connectivity is not useful, because the user

4749

// cannot use that network except through the notification shown by this method, and the

4750

// notification is only shown if the network is explicitly selected by the user.

4751

nai.onPreventAutomaticReconnect();

4752

4753

// TODO: Evaluate if it's needed to wait 8 seconds for triggering notification when

4754

// NetworkMonitor detects the network is partial connectivity. Need to change the design to

4755

// popup the notification immediately when the network is partial connectivity.

4756

if (nai.partialConnectivity) {

4757

showNetworkNotification(nai, NotificationType.PARTIAL_CONNECTIVITY);

4758

} else {

4759

showNetworkNotification(nai, NotificationType.NO_INTERNET);

}

}

private void handleNetworkUnvalidated(NetworkAgentInfo nai) {

4764

NetworkCapabilities nc = nai.networkCapabilities;

4765

if (DBG) log("handleNetworkUnvalidated " + nai.toShortString() + " cap=" + nc);

4766

4767

if (!nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {

return;

}

if (mMultinetworkPolicyTracker.shouldNotifyWifiUnvalidated()) {

4772

showNetworkNotification(nai, NotificationType.LOST_INTERNET);

}

}

@Override

public int getMultipathPreference(Network network) {

4778

enforceAccessPermission();

4779

4780

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

4781

if (nai != null && nai.networkCapabilities

4782

.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)) {

4783

return ConnectivityManager.MULTIPATH_PREFERENCE_UNMETERED;

4784

}

4785

4786

final NetworkPolicyManager netPolicyManager =

4787

mContext.getSystemService(NetworkPolicyManager.class);

4788

4789

final long token = Binder.clearCallingIdentity();

4790

final int networkPreference;

4791

try {

4792

networkPreference = netPolicyManager.getMultipathPreference(network);

4793

} finally {

4794

Binder.restoreCallingIdentity(token);

4795

}

4796

if (networkPreference != 0) {

4797

return networkPreference;

4798

}

4799

return mMultinetworkPolicyTracker.getMeteredMultipathPreference();

}

@Override

public NetworkRequest getDefaultRequest() {

4804

return mDefaultRequest.mRequests.get(0);

4805

}

4806

4807

private class InternalHandler extends Handler {

4808

public InternalHandler(Looper looper) {

super(looper);

}

@Override

public void handleMessage(Message msg) {

4814

switch (msg.what) {

4815

case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK:

4816

case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: {

4817

handleReleaseNetworkTransitionWakelock(msg.what);

4818

break;

4819

}

4820

case EVENT_APPLY_GLOBAL_HTTP_PROXY: {

4821

mProxyTracker.loadDeprecatedGlobalHttpProxy();

4822

break;

4823

}

4824

case EVENT_PROXY_HAS_CHANGED: {

4825

final Pair<Network, ProxyInfo> arg = (Pair<Network, ProxyInfo>) msg.obj;

4826

handleApplyDefaultProxy(arg.second);

4827

break;

4828

}

4829

case EVENT_REGISTER_NETWORK_PROVIDER: {

4830

handleRegisterNetworkProvider((NetworkProviderInfo) msg.obj);

4831

break;

4832

}

4833

case EVENT_UNREGISTER_NETWORK_PROVIDER: {

4834

handleUnregisterNetworkProvider((Messenger) msg.obj);

4835

break;

4836

}

4837

case EVENT_REGISTER_NETWORK_OFFER: {

4838

handleRegisterNetworkOffer((NetworkOffer) msg.obj);

4839

break;

4840

}

4841

case EVENT_UNREGISTER_NETWORK_OFFER: {

4842

final NetworkOfferInfo offer =

4843

findNetworkOfferInfoByCallback((INetworkOfferCallback) msg.obj);

4844

if (null != offer) {

4845

handleUnregisterNetworkOffer(offer);

}

break;

}

case EVENT_REGISTER_NETWORK_AGENT: {

4850

final Pair<NetworkAgentInfo, INetworkMonitor> arg =

4851

(Pair<NetworkAgentInfo, INetworkMonitor>) msg.obj;

4852

handleRegisterNetworkAgent(arg.first, arg.second);

4853

break;

4854

}

4855

case EVENT_REGISTER_NETWORK_REQUEST:

4856

case EVENT_REGISTER_NETWORK_LISTENER: {

4857

handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj);

4858

break;

4859

}

4860

case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT:

4861

case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: {

4862

handleRegisterNetworkRequestWithIntent(msg);

4863

break;

4864

}

4865

case EVENT_TIMEOUT_NETWORK_REQUEST: {

4866

NetworkRequestInfo nri = (NetworkRequestInfo) msg.obj;

4867

handleTimedOutNetworkRequest(nri);

4868

break;

4869

}

4870

case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: {

4871

handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1);

4872

break;

4873

}

4874

case EVENT_RELEASE_NETWORK_REQUEST: {

4875

handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1,

4876

/* callOnUnavailable */ false);

4877

break;

4878

}

4879

case EVENT_SET_ACCEPT_UNVALIDATED: {

4880

Network network = (Network) msg.obj;

4881

handleSetAcceptUnvalidated(network, toBool(msg.arg1), toBool(msg.arg2));

4882

break;

4883

}

4884

case EVENT_SET_ACCEPT_PARTIAL_CONNECTIVITY: {

4885

Network network = (Network) msg.obj;

4886

handleSetAcceptPartialConnectivity(network, toBool(msg.arg1),

toBool(msg.arg2));

break;

}

case EVENT_SET_AVOID_UNVALIDATED: {

4891

handleSetAvoidUnvalidated((Network) msg.obj);

4892

break;

4893

}

4894

case EVENT_PROMPT_UNVALIDATED: {

4895

handlePromptUnvalidated((Network) msg.obj);

4896

break;

4897

}

4898

case EVENT_CONFIGURE_ALWAYS_ON_NETWORKS: {

4899

handleConfigureAlwaysOnNetworks();

4900

break;

4901

}

4902

// Sent by KeepaliveTracker to process an app request on the state machine thread.

4903

case NetworkAgent.CMD_START_SOCKET_KEEPALIVE: {

4904

mKeepaliveTracker.handleStartKeepalive(msg);

4905

break;

4906

}

4907

// Sent by KeepaliveTracker to process an app request on the state machine thread.

4908

case NetworkAgent.CMD_STOP_SOCKET_KEEPALIVE: {

4909

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj);

4910

int slot = msg.arg1;

4911

int reason = msg.arg2;

4912

mKeepaliveTracker.handleStopKeepalive(nai, slot, reason);

4913

break;

4914

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

4915

case EVENT_REPORT_NETWORK_CONNECTIVITY: {

4916

handleReportNetworkConnectivity((NetworkAgentInfo) msg.obj, msg.arg1,

4917

toBool(msg.arg2));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4918

break;

4919

}

4920

case EVENT_PRIVATE_DNS_SETTINGS_CHANGED:

4921

handlePrivateDnsSettingsChanged();

4922

break;

4923

case EVENT_PRIVATE_DNS_VALIDATION_UPDATE:

4924

handlePrivateDnsValidationUpdate(

4925

(PrivateDnsValidationUpdate) msg.obj);

4926

break;

4927

case EVENT_UID_BLOCKED_REASON_CHANGED:

4928

handleUidBlockedReasonChanged(msg.arg1, msg.arg2);

4929

break;

4930

case EVENT_SET_REQUIRE_VPN_FOR_UIDS:

4931

handleSetRequireVpnForUids(toBool(msg.arg1), (UidRange[]) msg.obj);

4932

break;

4933

case EVENT_SET_OEM_NETWORK_PREFERENCE: {

4934

final Pair<OemNetworkPreferences, IOnCompleteListener> arg =

4935

(Pair<OemNetworkPreferences, IOnCompleteListener>) msg.obj;

4936

handleSetOemNetworkPreference(arg.first, arg.second);

4937

break;

4938

}

4939

case EVENT_SET_PROFILE_NETWORK_PREFERENCE: {

4940

final Pair<ProfileNetworkPreferences.Preference, IOnCompleteListener> arg =

4941

(Pair<ProfileNetworkPreferences.Preference, IOnCompleteListener>)

4942

msg.obj;

4943

handleSetProfileNetworkPreference(arg.first, arg.second);

4944

break;

4945

}

4946

case EVENT_REPORT_NETWORK_ACTIVITY:

4947

mNetworkActivityTracker.handleReportNetworkActivity();

4948

break;

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

4949

case EVENT_MOBILE_DATA_PREFERRED_UIDS_CHANGED:

4950

handleMobileDataPreferredUidsChanged();

4951

break;

Chiachang Wang

2021-06-17 22:11:30 +0800

[diff] [blame]

4952

case EVENT_SET_TEST_ALLOW_BAD_WIFI_UNTIL:

4953

final long timeMs = ((Long) msg.obj).longValue();

4954

mMultinetworkPolicyTracker.setTestAllowBadWifiUntil(timeMs);

4955

break;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

}

@Override

@Deprecated

public int getLastTetherError(String iface) {

4963

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

4964

Context.TETHERING_SERVICE);

4965

return tm.getLastTetherError(iface);

}

@Override

@Deprecated

public String[] getTetherableIfaces() {

4971

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

4972

Context.TETHERING_SERVICE);

4973

return tm.getTetherableIfaces();

}

@Override

@Deprecated

public String[] getTetheredIfaces() {

4979

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

4980

Context.TETHERING_SERVICE);

4981

return tm.getTetheredIfaces();

}

@Override

@Deprecated

public String[] getTetheringErroredIfaces() {

4988

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

4989

Context.TETHERING_SERVICE);

4990

4991

return tm.getTetheringErroredIfaces();

}

@Override

@Deprecated

public String[] getTetherableUsbRegexs() {

4997

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

4998

Context.TETHERING_SERVICE);

4999

5000

return tm.getTetherableUsbRegexs();

}

@Override

@Deprecated

public String[] getTetherableWifiRegexs() {

5006

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

5007

Context.TETHERING_SERVICE);

5008

return tm.getTetherableWifiRegexs();

5009

}

5010

5011

// Called when we lose the default network and have no replacement yet.

5012

// This will automatically be cleared after X seconds or a new default network

5013

// becomes CONNECTED, whichever happens first. The timer is started by the

5014

// first caller and not restarted by subsequent callers.

5015

private void ensureNetworkTransitionWakelock(String forWhom) {

5016

synchronized (this) {

5017

if (mNetTransitionWakeLock.isHeld()) {

5018

return;

5019

}

5020

mNetTransitionWakeLock.acquire();

5021

mLastWakeLockAcquireTimestamp = SystemClock.elapsedRealtime();

5022

mTotalWakelockAcquisitions++;

5023

}

5024

mWakelockLogs.log("ACQUIRE for " + forWhom);

5025

Message msg = mHandler.obtainMessage(EVENT_EXPIRE_NET_TRANSITION_WAKELOCK);

5026

final int lockTimeout = mResources.get().getInteger(

5027

R.integer.config_networkTransitionTimeout);

5028

mHandler.sendMessageDelayed(msg, lockTimeout);

5029

}

5030

5031

// Called when we gain a new default network to release the network transition wakelock in a

5032

// second, to allow a grace period for apps to reconnect over the new network. Pending expiry

5033

// message is cancelled.

5034

private void scheduleReleaseNetworkTransitionWakelock() {

5035

synchronized (this) {

5036

if (!mNetTransitionWakeLock.isHeld()) {

5037

return; // expiry message released the lock first.

5038

}

5039

}

5040

// Cancel self timeout on wakelock hold.

5041

mHandler.removeMessages(EVENT_EXPIRE_NET_TRANSITION_WAKELOCK);

5042

Message msg = mHandler.obtainMessage(EVENT_CLEAR_NET_TRANSITION_WAKELOCK);

5043

mHandler.sendMessageDelayed(msg, 1000);

5044

}

5045

5046

// Called when either message of ensureNetworkTransitionWakelock or

5047

// scheduleReleaseNetworkTransitionWakelock is processed.

5048

private void handleReleaseNetworkTransitionWakelock(int eventId) {

5049

String event = eventName(eventId);

5050

synchronized (this) {

5051

if (!mNetTransitionWakeLock.isHeld()) {

5052

mWakelockLogs.log(String.format("RELEASE: already released (%s)", event));

5053

Log.w(TAG, "expected Net Transition WakeLock to be held");

5054

return;

5055

}

5056

mNetTransitionWakeLock.release();

5057

long lockDuration = SystemClock.elapsedRealtime() - mLastWakeLockAcquireTimestamp;

5058

mTotalWakelockDurationMs += lockDuration;

5059

mMaxWakelockDurationMs = Math.max(mMaxWakelockDurationMs, lockDuration);

5060

mTotalWakelockReleases++;

5061

}

5062

mWakelockLogs.log(String.format("RELEASE (%s)", event));

5063

}

5064

5065

// 100 percent is full good, 0 is full bad.

5066

@Override

5067

public void reportInetCondition(int networkType, int percentage) {

5068

NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);

5069

if (nai == null) return;

5070

reportNetworkConnectivity(nai.network, percentage > 50);

}

@Override

public void reportNetworkConnectivity(Network network, boolean hasConnectivity) {

5075

enforceAccessPermission();

5076

enforceInternetPermission();

5077

final int uid = mDeps.getCallingUid();

5078

final int connectivityInfo = encodeBool(hasConnectivity);

5079

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5080

final NetworkAgentInfo nai;

5081

if (network == null) {

5082

nai = getDefaultNetwork();

5083

} else {

5084

nai = getNetworkAgentInfoForNetwork(network);

5085

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5086

5087

mHandler.sendMessage(

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

5088

mHandler.obtainMessage(

5089

EVENT_REPORT_NETWORK_CONNECTIVITY, uid, connectivityInfo, nai));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5090

}

5091

5092

private void handleReportNetworkConnectivity(

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

5093

@Nullable NetworkAgentInfo nai, int uid, boolean hasConnectivity) {

5094

// TODO(b/192611346): remove NetworkInfo.State.DISCONNECTING as it's not used

5095

if (nai == null

5096

|| nai != getNetworkAgentInfoForNetwork(nai.network)

5097

|| nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING

5098

|| nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5099

return;

5100

}

5101

// Revalidate if the app report does not match our current validated state.

5102

if (hasConnectivity == nai.lastValidated) {

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

5103

mConnectivityDiagnosticsHandler.sendMessage(

5104

mConnectivityDiagnosticsHandler.obtainMessage(

5105

ConnectivityDiagnosticsHandler.EVENT_NETWORK_CONNECTIVITY_REPORTED,

5106

new ReportedNetworkConnectivityInfo(

5107

hasConnectivity, false /* isNetworkRevalidating */, uid, nai)));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

return;

}

if (DBG) {

int netid = nai.network.getNetId();

5112

log("reportNetworkConnectivity(" + netid + ", " + hasConnectivity + ") by " + uid);

5113

}

5114

// Validating a network that has not yet connected could result in a call to

5115

// rematchNetworkAndRequests() which is not meant to work on such networks.

5116

if (!nai.everConnected) {

5117

return;

5118

}

5119

final NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai);

5120

if (isNetworkWithCapabilitiesBlocked(nc, uid, false)) {

5121

return;

5122

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

5123

5124

// Send CONNECTIVITY_REPORTED event before re-validating the Network to force an ordering of

5125

// ConnDiags events. This ensures that #onNetworkConnectivityReported() will be called

5126

// before #onConnectivityReportAvailable(), which is called once Network evaluation is

5127

// completed.

5128

mConnectivityDiagnosticsHandler.sendMessage(

5129

mConnectivityDiagnosticsHandler.obtainMessage(

5130

ConnectivityDiagnosticsHandler.EVENT_NETWORK_CONNECTIVITY_REPORTED,

5131

new ReportedNetworkConnectivityInfo(

5132

hasConnectivity, true /* isNetworkRevalidating */, uid, nai)));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5133

nai.networkMonitor().forceReevaluation(uid);

5134

}

5135

5136

// TODO: call into netd.

5137

private boolean queryUserAccess(int uid, Network network) {

5138

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

5139

if (nai == null) return false;

5140

5141

// Any UID can use its default network.

5142

if (nai == getDefaultNetworkForUid(uid)) return true;

5143

5144

// Privileged apps can use any network.

5145

if (mPermissionMonitor.hasRestrictedNetworksPermission(uid)) {

return true;

}

// An unprivileged UID can use a VPN iff the VPN applies to it.

5150

if (nai.isVPN()) {

5151

return nai.networkCapabilities.appliesToUid(uid);

5152

}

5153

5154

// An unprivileged UID can bypass the VPN that applies to it only if it can protect its

5155

// sockets, i.e., if it is the owner.

5156

final NetworkAgentInfo vpn = getVpnForUid(uid);

5157

if (vpn != null && !vpn.networkAgentConfig.allowBypass

5158

&& uid != vpn.networkCapabilities.getOwnerUid()) {

return false;

}

// The UID's permission must be at least sufficient for the network. Since the restricted

5163

// permission was already checked above, that just leaves background networks.

5164

if (!nai.networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) {

5165

return mPermissionMonitor.hasUseBackgroundNetworksPermission(uid);

5166

}

5167

5168

// Unrestricted network. Anyone gets to use it.

return true;

}

/**

* Returns information about the proxy a certain network is using. If given a null network, it

5174

* it will return the proxy for the bound network for the caller app or the default proxy if

5175

* none.

5176

*

5177

* @param network the network we want to get the proxy information for.

5178

* @return Proxy information if a network has a proxy configured, or otherwise null.

5179

*/

5180

@Override

5181

public ProxyInfo getProxyForNetwork(Network network) {

5182

final ProxyInfo globalProxy = mProxyTracker.getGlobalProxy();

5183

if (globalProxy != null) return globalProxy;

5184

if (network == null) {

5185

// Get the network associated with the calling UID.

5186

final Network activeNetwork = getActiveNetworkForUidInternal(mDeps.getCallingUid(),

5187

true);

5188

if (activeNetwork == null) {

5189

return null;

5190

}

5191

return getLinkPropertiesProxyInfo(activeNetwork);

5192

} else if (mDeps.queryUserAccess(mDeps.getCallingUid(), network, this)) {

5193

// Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which

5194

// caller may not have.

5195

return getLinkPropertiesProxyInfo(network);

5196

}

5197

// No proxy info available if the calling UID does not have network access.

return null;

}

private ProxyInfo getLinkPropertiesProxyInfo(Network network) {

5203

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

5204

if (nai == null) return null;

5205

synchronized (nai) {

5206

final ProxyInfo linkHttpProxy = nai.linkProperties.getHttpProxy();

5207

return linkHttpProxy == null ? null : new ProxyInfo(linkHttpProxy);

}

}

@Override

public void setGlobalProxy(@Nullable final ProxyInfo proxyProperties) {

5213

PermissionUtils.enforceNetworkStackPermission(mContext);

5214

mProxyTracker.setGlobalProxy(proxyProperties);

}

@Override

@Nullable

public ProxyInfo getGlobalProxy() {

5220

return mProxyTracker.getGlobalProxy();

5221

}

5222

5223

private void handleApplyDefaultProxy(ProxyInfo proxy) {

5224

if (proxy != null && TextUtils.isEmpty(proxy.getHost())

5225

&& Uri.EMPTY.equals(proxy.getPacFileUrl())) {

5226

proxy = null;

5227

}

5228

mProxyTracker.setDefaultProxy(proxy);

5229

}

5230

5231

// If the proxy has changed from oldLp to newLp, resend proxy broadcast. This method gets called

5232

// when any network changes proxy.

5233

// TODO: Remove usage of broadcast extras as they are deprecated and not applicable in a

5234

// multi-network world where an app might be bound to a non-default network.

5235

private void updateProxy(LinkProperties newLp, LinkProperties oldLp) {

5236

ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy();

5237

ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy();

5238

5239

if (!ProxyTracker.proxyInfoEqual(newProxyInfo, oldProxyInfo)) {

5240

mProxyTracker.sendProxyBroadcast();

}

}

private static class SettingsObserver extends ContentObserver {

5245

final private HashMap<Uri, Integer> mUriEventMap;

5246

final private Context mContext;

5247

final private Handler mHandler;

5248

5249

SettingsObserver(Context context, Handler handler) {

5250

super(null);

5251

mUriEventMap = new HashMap<>();

mContext = context;

mHandler = handler;

}

void observe(Uri uri, int what) {

5257

mUriEventMap.put(uri, what);

5258

final ContentResolver resolver = mContext.getContentResolver();

5259

resolver.registerContentObserver(uri, false, this);

}

@Override

public void onChange(boolean selfChange) {

5264

Log.wtf(TAG, "Should never be reached.");

}

@Override

public void onChange(boolean selfChange, Uri uri) {

5269

final Integer what = mUriEventMap.get(uri);

5270

if (what != null) {

5271

mHandler.obtainMessage(what).sendToTarget();

5272

} else {

5273

loge("No matching event to send for URI=" + uri);

}

}

}

private static void log(String s) {

Log.d(TAG, s);

}

private static void logw(String s) {

Log.w(TAG, s);

}

private static void logwtf(String s) {

Log.wtf(TAG, s);

}

private static void logwtf(String s, Throwable t) {

Log.wtf(TAG, s, t);

}

private static void loge(String s) {

Log.e(TAG, s);

}

private static void loge(String s, Throwable t) {

Log.e(TAG, s, t);

}

/**

* Return the information of all ongoing VPNs.

5304

*

5305

* This method is used to update NetworkStatsService.

5306

*

5307

* Must be called on the handler thread.

5308

*/

5309

private UnderlyingNetworkInfo[] getAllVpnInfo() {

5310

ensureRunningOnConnectivityServiceThread();

5311

if (mLockdownEnabled) {

5312

return new UnderlyingNetworkInfo[0];

5313

}

5314

List<UnderlyingNetworkInfo> infoList = new ArrayList<>();

5315

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

5316

UnderlyingNetworkInfo info = createVpnInfo(nai);

if (info != null) {

infoList.add(info);

}

}

return infoList.toArray(new UnderlyingNetworkInfo[infoList.size()]);

}

/**

* @return VPN information for accounting, or null if we can't retrieve all required

5326

* information, e.g underlying ifaces.

5327

*/

5328

private UnderlyingNetworkInfo createVpnInfo(NetworkAgentInfo nai) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5329

Network[] underlyingNetworks = nai.declaredUnderlyingNetworks;

5330

// see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret

5331

// the underlyingNetworks list.

Lorenzo Colitti

2021-07-02 11:47:57 +0900

[diff] [blame]

5332

// TODO: stop using propagateUnderlyingCapabilities here, for example, by always

5333

// initializing NetworkAgentInfo#declaredUnderlyingNetworks to an empty array.

5334

if (underlyingNetworks == null && nai.propagateUnderlyingCapabilities()) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5335

final NetworkAgentInfo defaultNai = getDefaultNetworkForUid(

5336

nai.networkCapabilities.getOwnerUid());

5337

if (defaultNai != null) {

5338

underlyingNetworks = new Network[] { defaultNai.network };

}

}

if (CollectionUtils.isEmpty(underlyingNetworks)) return null;

5343

5344

List<String> interfaces = new ArrayList<>();

5345

for (Network network : underlyingNetworks) {

5346

NetworkAgentInfo underlyingNai = getNetworkAgentInfoForNetwork(network);

5347

if (underlyingNai == null) continue;

5348

LinkProperties lp = underlyingNai.linkProperties;

5349

for (String iface : lp.getAllInterfaceNames()) {

5350

if (!TextUtils.isEmpty(iface)) {

5351

interfaces.add(iface);

}

}

}

if (interfaces.isEmpty()) return null;

5357

5358

// Must be non-null or NetworkStatsService will crash.

5359

// Cannot happen in production code because Vpn only registers the NetworkAgent after the

5360

// tun or ipsec interface is created.

5361

// TODO: Remove this check.

5362

if (nai.linkProperties.getInterfaceName() == null) return null;

5363

5364

return new UnderlyingNetworkInfo(nai.networkCapabilities.getOwnerUid(),

5365

nai.linkProperties.getInterfaceName(), interfaces);

5366

}

5367

5368

// TODO This needs to be the default network that applies to the NAI.

5369

private Network[] underlyingNetworksOrDefault(final int ownerUid,

5370

Network[] underlyingNetworks) {

5371

final Network defaultNetwork = getNetwork(getDefaultNetworkForUid(ownerUid));

5372

if (underlyingNetworks == null && defaultNetwork != null) {

5373

// null underlying networks means to track the default.

5374

underlyingNetworks = new Network[] { defaultNetwork };

5375

}

5376

return underlyingNetworks;

5377

}

5378

5379

// Returns true iff |network| is an underlying network of |nai|.

5380

private boolean hasUnderlyingNetwork(NetworkAgentInfo nai, Network network) {

5381

// TODO: support more than one level of underlying networks, either via a fixed-depth search

5382

// (e.g., 2 levels of underlying networks), or via loop detection, or....

Lorenzo Colitti

2021-07-02 11:47:57 +0900

[diff] [blame]

5383

if (!nai.propagateUnderlyingCapabilities()) return false;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5384

final Network[] underlying = underlyingNetworksOrDefault(

5385

nai.networkCapabilities.getOwnerUid(), nai.declaredUnderlyingNetworks);

5386

return CollectionUtils.contains(underlying, network);

}

/**

* Recompute the capabilities for any networks that had a specific network as underlying.

5391

*

5392

* When underlying networks change, such networks may have to update capabilities to reflect

5393

* things like the metered bit, their transports, and so on. The capabilities are calculated

5394

* immediately. This method runs on the ConnectivityService thread.

5395

*/

5396

private void propagateUnderlyingNetworkCapabilities(Network updatedNetwork) {

5397

ensureRunningOnConnectivityServiceThread();

5398

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

5399

if (updatedNetwork == null || hasUnderlyingNetwork(nai, updatedNetwork)) {

5400

updateCapabilitiesForNetwork(nai);

}

}

}

private boolean isUidBlockedByVpn(int uid, List<UidRange> blockedUidRanges) {

5406

// Determine whether this UID is blocked because of always-on VPN lockdown. If a VPN applies

5407

// to the UID, then the UID is not blocked because always-on VPN lockdown applies only when

5408

// a VPN is not up.

5409

final NetworkAgentInfo vpnNai = getVpnForUid(uid);

5410

if (vpnNai != null && !vpnNai.networkAgentConfig.allowBypass) return false;

5411

for (UidRange range : blockedUidRanges) {

5412

if (range.contains(uid)) return true;

}

return false;

}

@Override

public void setRequireVpnForUids(boolean requireVpn, UidRange[] ranges) {

5419

enforceNetworkStackOrSettingsPermission();

5420

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_REQUIRE_VPN_FOR_UIDS,

5421

encodeBool(requireVpn), 0 /* arg2 */, ranges));

5422

}

5423

5424

private void handleSetRequireVpnForUids(boolean requireVpn, UidRange[] ranges) {

5425

if (DBG) {

5426

Log.d(TAG, "Setting VPN " + (requireVpn ? "" : "not ") + "required for UIDs: "

5427

+ Arrays.toString(ranges));

5428

}

5429

// Cannot use a Set since the list of UID ranges might contain duplicates.

5430

final List<UidRange> newVpnBlockedUidRanges = new ArrayList(mVpnBlockedUidRanges);

5431

for (int i = 0; i < ranges.length; i++) {

5432

if (requireVpn) {

5433

newVpnBlockedUidRanges.add(ranges[i]);

5434

} else {

5435

newVpnBlockedUidRanges.remove(ranges[i]);

}

}

try {

mNetd.networkRejectNonSecureVpn(requireVpn, toUidRangeStableParcels(ranges));

5441

} catch (RemoteException | ServiceSpecificException e) {

5442

Log.e(TAG, "setRequireVpnForUids(" + requireVpn + ", "

5443

+ Arrays.toString(ranges) + "): netd command failed: " + e);

5444

}

5445

5446

for (final NetworkAgentInfo nai : mNetworkAgentInfos) {

5447

final boolean curMetered = nai.networkCapabilities.isMetered();

5448

maybeNotifyNetworkBlocked(nai, curMetered, curMetered,

5449

mVpnBlockedUidRanges, newVpnBlockedUidRanges);

5450

}

5451

5452

mVpnBlockedUidRanges = newVpnBlockedUidRanges;

}

@Override

public void setLegacyLockdownVpnEnabled(boolean enabled) {

5457

enforceNetworkStackOrSettingsPermission();

5458

mHandler.post(() -> mLockdownEnabled = enabled);

5459

}

5460

5461

private boolean isLegacyLockdownNai(NetworkAgentInfo nai) {

5462

return mLockdownEnabled

5463

&& getVpnType(nai) == VpnManager.TYPE_VPN_LEGACY

5464

&& nai.networkCapabilities.appliesToUid(Process.FIRST_APPLICATION_UID);

5465

}

5466

5467

private NetworkAgentInfo getLegacyLockdownNai() {

5468

if (!mLockdownEnabled) {

5469

return null;

5470

}

5471

// The legacy lockdown VPN always only applies to userId 0.

5472

final NetworkAgentInfo nai = getVpnForUid(Process.FIRST_APPLICATION_UID);

5473

if (nai == null || !isLegacyLockdownNai(nai)) return null;

5474

5475

// The legacy lockdown VPN must always have exactly one underlying network.

5476

// This code may run on any thread and declaredUnderlyingNetworks may change, so store it in

5477

// a local variable. There is no need to make a copy because its contents cannot change.

5478

final Network[] underlying = nai.declaredUnderlyingNetworks;

5479

if (underlying == null || underlying.length != 1) {

return null;

}

// The legacy lockdown VPN always uses the default network.

5484

// If the VPN's underlying network is no longer the current default network, it means that

5485

// the default network has just switched, and the VPN is about to disconnect.

5486

// Report that the VPN is not connected, so the state of NetworkInfo objects overwritten

5487

// by filterForLegacyLockdown will be set to CONNECTING and not CONNECTED.

5488

final NetworkAgentInfo defaultNetwork = getDefaultNetwork();

5489

if (defaultNetwork == null || !defaultNetwork.network.equals(underlying[0])) {

return null;

}

return nai;

};

// TODO: move all callers to filterForLegacyLockdown and delete this method.

5497

// This likely requires making sendLegacyNetworkBroadcast take a NetworkInfo object instead of

5498

// just a DetailedState object.

5499

private DetailedState getLegacyLockdownState(DetailedState origState) {

5500

if (origState != DetailedState.CONNECTED) {

5501

return origState;

5502

}

5503

return (mLockdownEnabled && getLegacyLockdownNai() == null)

5504

? DetailedState.CONNECTING

5505

: DetailedState.CONNECTED;

5506

}

5507

5508

private void filterForLegacyLockdown(NetworkInfo ni) {

5509

if (!mLockdownEnabled || !ni.isConnected()) return;

5510

// The legacy lockdown VPN replaces the state of every network in CONNECTED state with the

5511

// state of its VPN. This is to ensure that when an underlying network connects, apps will

5512

// not see a CONNECTIVITY_ACTION broadcast for a network in state CONNECTED until the VPN

5513

// comes up, at which point there is a new CONNECTIVITY_ACTION broadcast for the underlying

5514

// network, this time with a state of CONNECTED.

5515

//

5516

// Now that the legacy lockdown code lives in ConnectivityService, and no longer has access

5517

// to the internal state of the Vpn object, always replace the state with CONNECTING. This

5518

// is not too far off the truth, since an always-on VPN, when not connected, is always

5519

// trying to reconnect.

5520

if (getLegacyLockdownNai() == null) {

5521

ni.setDetailedState(DetailedState.CONNECTING, "", null);

}

}

@Override

public void setProvisioningNotificationVisible(boolean visible, int networkType,

5527

String action) {

5528

enforceSettingsPermission();

5529

if (!ConnectivityManager.isNetworkTypeValid(networkType)) {

5530

return;

5531

}

5532

final long ident = Binder.clearCallingIdentity();

5533

try {

5534

// Concatenate the range of types onto the range of NetIDs.

5535

int id = NetIdManager.MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE);

5536

mNotifier.setProvNotificationVisible(visible, id, action);

5537

} finally {

5538

Binder.restoreCallingIdentity(ident);

}

}

@Override

public void setAirplaneMode(boolean enable) {

5544

enforceAirplaneModePermission();

5545

final long ident = Binder.clearCallingIdentity();

5546

try {

5547

final ContentResolver cr = mContext.getContentResolver();

5548

Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, encodeBool(enable));

5549

Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);

5550

intent.putExtra("state", enable);

5551

mContext.sendBroadcastAsUser(intent, UserHandle.ALL);

5552

} finally {

5553

Binder.restoreCallingIdentity(ident);

}

}

private void onUserAdded(@NonNull final UserHandle user) {

5558

mPermissionMonitor.onUserAdded(user);

5559

if (mOemNetworkPreferences.getNetworkPreferences().size() > 0) {

5560

handleSetOemNetworkPreference(mOemNetworkPreferences, null);

}

}

private void onUserRemoved(@NonNull final UserHandle user) {

5565

mPermissionMonitor.onUserRemoved(user);

5566

// If there was a network preference for this user, remove it.

5567

handleSetProfileNetworkPreference(new ProfileNetworkPreferences.Preference(user, null),

5568

null /* listener */);

5569

if (mOemNetworkPreferences.getNetworkPreferences().size() > 0) {

5570

handleSetOemNetworkPreference(mOemNetworkPreferences, null);

}

}

private void onPackageChanged(@NonNull final String packageName) {

5575

// This is necessary in case a package is added or removed, but also when it's replaced to

5576

// run as a new UID by its manifest rules. Also, if a separate package shares the same UID

5577

// as one in the preferences, then it should follow the same routing as that other package,

5578

// which means updating the rules is never to be needed in this case (whether it joins or

5579

// leaves a UID with a preference).

5580

if (isMappedInOemNetworkPreference(packageName)) {

5581

handleSetOemNetworkPreference(mOemNetworkPreferences, null);

}

}

private final BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() {

5586

@Override

5587

public void onReceive(Context context, Intent intent) {

5588

ensureRunningOnConnectivityServiceThread();

5589

final String action = intent.getAction();

5590

final UserHandle user = intent.getParcelableExtra(Intent.EXTRA_USER);

5591

5592

// User should be filled for below intents, check the existence.

5593

if (user == null) {

5594

Log.wtf(TAG, intent.getAction() + " broadcast without EXTRA_USER");

return;

}

if (Intent.ACTION_USER_ADDED.equals(action)) {

5599

onUserAdded(user);

5600

} else if (Intent.ACTION_USER_REMOVED.equals(action)) {

5601

onUserRemoved(user);

5602

} else {

5603

Log.wtf(TAG, "received unexpected intent: " + action);

}

}

};

private final BroadcastReceiver mPackageIntentReceiver = new BroadcastReceiver() {

5609

@Override

5610

public void onReceive(Context context, Intent intent) {

5611

ensureRunningOnConnectivityServiceThread();

5612

switch (intent.getAction()) {

5613

case Intent.ACTION_PACKAGE_ADDED:

5614

case Intent.ACTION_PACKAGE_REMOVED:

5615

case Intent.ACTION_PACKAGE_REPLACED:

5616

onPackageChanged(intent.getData().getSchemeSpecificPart());

5617

break;

5618

default:

5619

Log.wtf(TAG, "received unexpected intent: " + intent.getAction());

}

}

};

private final HashMap<Messenger, NetworkProviderInfo> mNetworkProviderInfos = new HashMap<>();

5625

private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = new HashMap<>();

5626

5627

private static class NetworkProviderInfo {

5628

public final String name;

5629

public final Messenger messenger;

5630

private final IBinder.DeathRecipient mDeathRecipient;

5631

public final int providerId;

5632

5633

NetworkProviderInfo(String name, Messenger messenger, int providerId,

5634

@NonNull IBinder.DeathRecipient deathRecipient) {

5635

this.name = name;

5636

this.messenger = messenger;

5637

this.providerId = providerId;

5638

mDeathRecipient = deathRecipient;

5639

5640

if (mDeathRecipient == null) {

5641

throw new AssertionError("Must pass a deathRecipient");

}

}

void connect(Context context, Handler handler) {

5646

try {

5647

messenger.getBinder().linkToDeath(mDeathRecipient, 0);

5648

} catch (RemoteException e) {

5649

mDeathRecipient.binderDied();

}

}

}

private void ensureAllNetworkRequestsHaveType(List<NetworkRequest> requests) {

5655

for (int i = 0; i < requests.size(); i++) {

5656

ensureNetworkRequestHasType(requests.get(i));

}

}

private void ensureNetworkRequestHasType(NetworkRequest request) {

5661

if (request.type == NetworkRequest.Type.NONE) {

5662

throw new IllegalArgumentException(

5663

"All NetworkRequests in ConnectivityService must have a type");

}

}

/**

* Tracks info about the requester.

5669

* Also used to notice when the calling process dies so as to self-expire

5670

*/

5671

@VisibleForTesting

5672

protected class NetworkRequestInfo implements IBinder.DeathRecipient {

5673

// The requests to be satisfied in priority order. Non-multilayer requests will only have a

5674

// single NetworkRequest in mRequests.

5675

final List<NetworkRequest> mRequests;

5676

5677

// mSatisfier and mActiveRequest rely on one another therefore set them together.

5678

void setSatisfier(

5679

@Nullable final NetworkAgentInfo satisfier,

5680

@Nullable final NetworkRequest activeRequest) {

5681

mSatisfier = satisfier;

5682

mActiveRequest = activeRequest;

5683

}

5684

5685

// The network currently satisfying this NRI. Only one request in an NRI can have a

5686

// satisfier. For non-multilayer requests, only non-listen requests can have a satisfier.

5687

@Nullable

5688

private NetworkAgentInfo mSatisfier;

5689

NetworkAgentInfo getSatisfier() {

return mSatisfier;

}

// The request in mRequests assigned to a network agent. This is null if none of the

5694

// requests in mRequests can be satisfied. This member has the constraint of only being

5695

// accessible on the handler thread.

5696

@Nullable

5697

private NetworkRequest mActiveRequest;

5698

NetworkRequest getActiveRequest() {

5699

return mActiveRequest;

5700

}

5701

5702

final PendingIntent mPendingIntent;

5703

boolean mPendingIntentSent;

5704

@Nullable

5705

final Messenger mMessenger;

5706

5707

// Information about the caller that caused this object to be created.

5708

@Nullable

5709

private final IBinder mBinder;

5710

final int mPid;

5711

final int mUid;

5712

final @NetworkCallback.Flag int mCallbackFlags;

5713

@Nullable

5714

final String mCallingAttributionTag;

5715

5716

// Counter keeping track of this NRI.

5717

final PerUidCounter mPerUidCounter;

5718

5719

// Effective UID of this request. This is different from mUid when a privileged process

5720

// files a request on behalf of another UID. This UID is used to determine blocked status,

5721

// UID matching, and so on. mUid above is used for permission checks and to enforce the

5722

// maximum limit of registered callbacks per UID.

5723

final int mAsUid;

5724

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5725

// Preference order of this request.

5726

final int mPreferenceOrder;

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

5727

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5728

// In order to preserve the mapping of NetworkRequest-to-callback when apps register

5729

// callbacks using a returned NetworkRequest, the original NetworkRequest needs to be

5730

// maintained for keying off of. This is only a concern when the original nri

5731

// mNetworkRequests changes which happens currently for apps that register callbacks to

5732

// track the default network. In those cases, the nri is updated to have mNetworkRequests

5733

// that match the per-app default nri that currently tracks the calling app's uid so that

5734

// callbacks are fired at the appropriate time. When the callbacks fire,

5735

// mNetworkRequestForCallback will be used so as to preserve the caller's mapping. When

5736

// callbacks are updated to key off of an nri vs NetworkRequest, this stops being an issue.

5737

// TODO b/177608132: make sure callbacks are indexed by NRIs and not NetworkRequest objects.

5738

@NonNull

5739

private final NetworkRequest mNetworkRequestForCallback;

5740

NetworkRequest getNetworkRequestForCallback() {

5741

return mNetworkRequestForCallback;

}

/**

* Get the list of UIDs this nri applies to.

5746

*/

5747

@NonNull

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

5748

Set<UidRange> getUids() {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5749

// networkCapabilities.getUids() returns a defensive copy.

5750

// multilayer requests will all have the same uids so return the first one.

5751

final Set<UidRange> uids = mRequests.get(0).networkCapabilities.getUidRanges();

5752

return (null == uids) ? new ArraySet<>() : uids;

5753

}

5754

5755

NetworkRequestInfo(int asUid, @NonNull final NetworkRequest r,

5756

@Nullable final PendingIntent pi, @Nullable String callingAttributionTag) {

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

5757

this(asUid, Collections.singletonList(r), r, pi, callingAttributionTag,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5758

PREFERENCE_ORDER_INVALID);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5759

}

5760

5761

NetworkRequestInfo(int asUid, @NonNull final List<NetworkRequest> r,

5762

@NonNull final NetworkRequest requestForCallback, @Nullable final PendingIntent pi,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5763

@Nullable String callingAttributionTag, final int preferenceOrder) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5764

ensureAllNetworkRequestsHaveType(r);

5765

mRequests = initializeRequests(r);

5766

mNetworkRequestForCallback = requestForCallback;

mPendingIntent = pi;

mMessenger = null;

mBinder = null;

mPid = getCallingPid();

5771

mUid = mDeps.getCallingUid();

5772

mAsUid = asUid;

5773

mPerUidCounter = getRequestCounter(this);

5774

mPerUidCounter.incrementCountOrThrow(mUid);

5775

/**

5776

* Location sensitive data not included in pending intent. Only included in

5777

* {@link NetworkCallback}.

5778

*/

5779

mCallbackFlags = NetworkCallback.FLAG_NONE;

5780

mCallingAttributionTag = callingAttributionTag;

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5781

mPreferenceOrder = preferenceOrder;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5782

}

5783

5784

NetworkRequestInfo(int asUid, @NonNull final NetworkRequest r, @Nullable final Messenger m,

5785

@Nullable final IBinder binder,

5786

@NetworkCallback.Flag int callbackFlags,

5787

@Nullable String callingAttributionTag) {

5788

this(asUid, Collections.singletonList(r), r, m, binder, callbackFlags,

5789

callingAttributionTag);

5790

}

5791

5792

NetworkRequestInfo(int asUid, @NonNull final List<NetworkRequest> r,

5793

@NonNull final NetworkRequest requestForCallback, @Nullable final Messenger m,

5794

@Nullable final IBinder binder,

5795

@NetworkCallback.Flag int callbackFlags,

5796

@Nullable String callingAttributionTag) {

5797

super();

5798

ensureAllNetworkRequestsHaveType(r);

5799

mRequests = initializeRequests(r);

5800

mNetworkRequestForCallback = requestForCallback;

5801

mMessenger = m;

5802

mBinder = binder;

5803

mPid = getCallingPid();

5804

mUid = mDeps.getCallingUid();

5805

mAsUid = asUid;

5806

mPendingIntent = null;

5807

mPerUidCounter = getRequestCounter(this);

5808

mPerUidCounter.incrementCountOrThrow(mUid);

5809

mCallbackFlags = callbackFlags;

5810

mCallingAttributionTag = callingAttributionTag;

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5811

mPreferenceOrder = PREFERENCE_ORDER_INVALID;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5812

linkDeathRecipient();

5813

}

5814

5815

NetworkRequestInfo(@NonNull final NetworkRequestInfo nri,

5816

@NonNull final List<NetworkRequest> r) {

5817

super();

5818

ensureAllNetworkRequestsHaveType(r);

5819

mRequests = initializeRequests(r);

5820

mNetworkRequestForCallback = nri.getNetworkRequestForCallback();

5821

final NetworkAgentInfo satisfier = nri.getSatisfier();

5822

if (null != satisfier) {

5823

// If the old NRI was satisfied by an NAI, then it may have had an active request.

5824

// The active request is necessary to figure out what callbacks to send, in

5825

// particular then a network updates its capabilities.

5826

// As this code creates a new NRI with a new set of requests, figure out which of

5827

// the list of requests should be the active request. It is always the first

5828

// request of the list that can be satisfied by the satisfier since the order of

5829

// requests is a priority order.

5830

// Note even in the presence of a satisfier there may not be an active request,

5831

// when the satisfier is the no-service network.

5832

NetworkRequest activeRequest = null;

5833

for (final NetworkRequest candidate : r) {

5834

if (candidate.canBeSatisfiedBy(satisfier.networkCapabilities)) {

5835

activeRequest = candidate;

break;

}

}

setSatisfier(satisfier, activeRequest);

5840

}

5841

mMessenger = nri.mMessenger;

5842

mBinder = nri.mBinder;

mPid = nri.mPid;

mUid = nri.mUid;

mAsUid = nri.mAsUid;

mPendingIntent = nri.mPendingIntent;

5847

mPerUidCounter = getRequestCounter(this);

5848

mPerUidCounter.incrementCountOrThrow(mUid);

5849

mCallbackFlags = nri.mCallbackFlags;

5850

mCallingAttributionTag = nri.mCallingAttributionTag;

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5851

mPreferenceOrder = PREFERENCE_ORDER_INVALID;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5852

linkDeathRecipient();

5853

}

5854

5855

NetworkRequestInfo(int asUid, @NonNull final NetworkRequest r) {

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5856

this(asUid, Collections.singletonList(r), PREFERENCE_ORDER_INVALID);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5857

}

5858

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

5859

NetworkRequestInfo(int asUid, @NonNull final List<NetworkRequest> r,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5860

final int preferenceOrder) {

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

5861

this(asUid, r, r.get(0), null /* pi */, null /* callingAttributionTag */,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5862

preferenceOrder);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5863

}

5864

5865

// True if this NRI is being satisfied. It also accounts for if the nri has its satisifer

5866

// set to the mNoServiceNetwork in which case mActiveRequest will be null thus returning

5867

// false.

5868

boolean isBeingSatisfied() {

5869

return (null != mSatisfier && null != mActiveRequest);

5870

}

5871

5872

boolean isMultilayerRequest() {

5873

return mRequests.size() > 1;

5874

}

5875

5876

private List<NetworkRequest> initializeRequests(List<NetworkRequest> r) {

5877

// Creating a defensive copy to prevent the sender from modifying the list being

5878

// reflected in the return value of this method.

5879

final List<NetworkRequest> tempRequests = new ArrayList<>(r);

5880

return Collections.unmodifiableList(tempRequests);

5881

}

5882

5883

void decrementRequestCount() {

5884

mPerUidCounter.decrementCount(mUid);

5885

}

5886

5887

void linkDeathRecipient() {

5888

if (null != mBinder) {

5889

try {

5890

mBinder.linkToDeath(this, 0);

5891

} catch (RemoteException e) {

binderDied();

}

}

}

void unlinkDeathRecipient() {

5898

if (null != mBinder) {

5899

mBinder.unlinkToDeath(this, 0);

}

}

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5903

boolean hasHigherOrderThan(@NonNull final NetworkRequestInfo target) {

5904

// Compare two preference orders.

5905

return mPreferenceOrder < target.mPreferenceOrder;

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

5906

}

5907

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5908

int getPreferenceOrderForNetd() {

5909

if (mPreferenceOrder >= PREFERENCE_ORDER_NONE

5910

&& mPreferenceOrder <= PREFERENCE_ORDER_LOWEST) {

5911

return mPreferenceOrder;

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

5912

}

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5913

return PREFERENCE_ORDER_NONE;

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

5914

}

5915

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5916

@Override

5917

public void binderDied() {

5918

log("ConnectivityService NetworkRequestInfo binderDied(" +

James Mattis

8f03680

2021-06-20 16:26:01 -0700

[diff] [blame]

5919

"uid/pid:" + mUid + "/" + mPid + ", " + mBinder + ")");

5920

mHandler.post(() -> handleRemoveNetworkRequest(this));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

@Override

public String toString() {

5925

final String asUidString = (mAsUid == mUid) ? "" : " asUid: " + mAsUid;

5926

return "uid/pid:" + mUid + "/" + mPid + asUidString + " activeRequest: "

5927

+ (mActiveRequest == null ? null : mActiveRequest.requestId)

5928

+ " callbackRequest: "

5929

+ mNetworkRequestForCallback.requestId

5930

+ " " + mRequests

5931

+ (mPendingIntent == null ? "" : " to trigger " + mPendingIntent)

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

5932

+ " callback flags: " + mCallbackFlags

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5933

+ " order: " + mPreferenceOrder;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) {

5938

final String badCapability = networkCapabilities.describeFirstNonRequestableCapability();

5939

if (badCapability != null) {

5940

throw new IllegalArgumentException("Cannot request network with " + badCapability);

}

}

// This checks that the passed capabilities either do not request a

5945

// specific SSID/SignalStrength, or the calling app has permission to do so.

5946

private void ensureSufficientPermissionsForRequest(NetworkCapabilities nc,

5947

int callerPid, int callerUid, String callerPackageName) {

5948

if (null != nc.getSsid() && !checkSettingsPermission(callerPid, callerUid)) {

5949

throw new SecurityException("Insufficient permissions to request a specific SSID");

5950

}

5951

5952

if (nc.hasSignalStrength()

5953

&& !checkNetworkSignalStrengthWakeupPermission(callerPid, callerUid)) {

5954

throw new SecurityException(

5955

"Insufficient permissions to request a specific signal strength");

5956

}

5957

mAppOpsManager.checkPackage(callerUid, callerPackageName);

5958

5959

if (!nc.getSubscriptionIds().isEmpty()) {

5960

enforceNetworkFactoryPermission();

}

}

private int[] getSignalStrengthThresholds(@NonNull final NetworkAgentInfo nai) {

5965

final SortedSet<Integer> thresholds = new TreeSet<>();

5966

synchronized (nai) {

5967

// mNetworkRequests may contain the same value multiple times in case of

5968

// multilayer requests. It won't matter in this case because the thresholds

5969

// will then be the same and be deduplicated as they enter the `thresholds` set.

5970

// TODO : have mNetworkRequests be a Set<NetworkRequestInfo> or the like.

5971

for (final NetworkRequestInfo nri : mNetworkRequests.values()) {

5972

for (final NetworkRequest req : nri.mRequests) {

5973

if (req.networkCapabilities.hasSignalStrength()

5974

&& nai.satisfiesImmutableCapabilitiesOf(req)) {

5975

thresholds.add(req.networkCapabilities.getSignalStrength());

}

}

}

}

return CollectionUtils.toIntArray(new ArrayList<>(thresholds));

5981

}

5982

5983

private void updateSignalStrengthThresholds(

5984

NetworkAgentInfo nai, String reason, NetworkRequest request) {

5985

final int[] thresholdsArray = getSignalStrengthThresholds(nai);

5986

5987

if (VDBG || (DBG && !"CONNECT".equals(reason))) {

5988

String detail;

5989

if (request != null && request.networkCapabilities.hasSignalStrength()) {

5990

detail = reason + " " + request.networkCapabilities.getSignalStrength();

} else {

detail = reason;

}

log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s",

5995

detail, Arrays.toString(thresholdsArray), nai.toShortString()));

5996

}

5997

5998

nai.onSignalStrengthThresholdsUpdated(thresholdsArray);

5999

}

6000

6001

private void ensureValidNetworkSpecifier(NetworkCapabilities nc) {

if (nc == null) {

return;

}

NetworkSpecifier ns = nc.getNetworkSpecifier();

if (ns == null) {

return;

}

if (ns instanceof MatchAllNetworkSpecifier) {

6010

throw new IllegalArgumentException("A MatchAllNetworkSpecifier is not permitted");

}

}

private void ensureValid(NetworkCapabilities nc) {

6015

ensureValidNetworkSpecifier(nc);

6016

if (nc.isPrivateDnsBroken()) {

6017

throw new IllegalArgumentException("Can't request broken private DNS");

}

}

private boolean isTargetSdkAtleast(int version, int callingUid,

6022

@NonNull String callingPackageName) {

6023

final UserHandle user = UserHandle.getUserHandleForUid(callingUid);

6024

final PackageManager pm =

6025

mContext.createContextAsUser(user, 0 /* flags */).getPackageManager();

6026

try {

6027

final int callingVersion = pm.getTargetSdkVersion(callingPackageName);

6028

if (callingVersion < version) return false;

6029

} catch (PackageManager.NameNotFoundException e) { }

return true;

}

@Override

public NetworkRequest requestNetwork(int asUid, NetworkCapabilities networkCapabilities,

6035

int reqTypeInt, Messenger messenger, int timeoutMs, IBinder binder,

6036

int legacyType, int callbackFlags, @NonNull String callingPackageName,

6037

@Nullable String callingAttributionTag) {

6038

if (legacyType != TYPE_NONE && !checkNetworkStackPermission()) {

6039

if (isTargetSdkAtleast(Build.VERSION_CODES.M, mDeps.getCallingUid(),

6040

callingPackageName)) {

6041

throw new SecurityException("Insufficient permissions to specify legacy type");

6042

}

6043

}

6044

final NetworkCapabilities defaultNc = mDefaultRequest.mRequests.get(0).networkCapabilities;

6045

final int callingUid = mDeps.getCallingUid();

6046

// Privileged callers can track the default network of another UID by passing in a UID.

6047

if (asUid != Process.INVALID_UID) {

6048

enforceSettingsPermission();

} else {

asUid = callingUid;

}

final NetworkRequest.Type reqType;

6053

try {

6054

reqType = NetworkRequest.Type.values()[reqTypeInt];

6055

} catch (ArrayIndexOutOfBoundsException e) {

6056

throw new IllegalArgumentException("Unsupported request type " + reqTypeInt);

}

switch (reqType) {

case TRACK_DEFAULT:

// If the request type is TRACK_DEFAULT, the passed {@code networkCapabilities}

6061

// is unused and will be replaced by ones appropriate for the UID (usually, the

6062

// calling app). This allows callers to keep track of the default network.

6063

networkCapabilities = copyDefaultNetworkCapabilitiesForUid(

6064

defaultNc, asUid, callingUid, callingPackageName);

6065

enforceAccessPermission();

6066

break;

6067

case TRACK_SYSTEM_DEFAULT:

6068

enforceSettingsPermission();

6069

networkCapabilities = new NetworkCapabilities(defaultNc);

6070

break;

6071

case BACKGROUND_REQUEST:

6072

enforceNetworkStackOrSettingsPermission();

6073

// Fall-through since other checks are the same with normal requests.

6074

case REQUEST:

6075

networkCapabilities = new NetworkCapabilities(networkCapabilities);

6076

enforceNetworkRequestPermissions(networkCapabilities, callingPackageName,

6077

callingAttributionTag);

6078

// TODO: this is incorrect. We mark the request as metered or not depending on

6079

// the state of the app when the request is filed, but we never change the

6080

// request if the app changes network state. http://b/29964605

6081

enforceMeteredApnPolicy(networkCapabilities);

6082

break;

6083

case LISTEN_FOR_BEST:

6084

enforceAccessPermission();

6085

networkCapabilities = new NetworkCapabilities(networkCapabilities);

6086

break;

6087

default:

6088

throw new IllegalArgumentException("Unsupported request type " + reqType);

6089

}

6090

ensureRequestableCapabilities(networkCapabilities);

6091

ensureSufficientPermissionsForRequest(networkCapabilities,

6092

Binder.getCallingPid(), callingUid, callingPackageName);

6093

6094

// Enforce FOREGROUND if the caller does not have permission to use background network.

6095

if (reqType == LISTEN_FOR_BEST) {

6096

restrictBackgroundRequestForCaller(networkCapabilities);

6097

}

6098

6099

// Set the UID range for this request to the single UID of the requester, unless the

6100

// requester has the permission to specify other UIDs.

6101

// This will overwrite any allowed UIDs in the requested capabilities. Though there

6102

// are no visible methods to set the UIDs, an app could use reflection to try and get

6103

// networks for other apps so it's essential that the UIDs are overwritten.

6104

// Also set the requester UID and package name in the request.

6105

restrictRequestUidsForCallerAndSetRequestorInfo(networkCapabilities,

6106

callingUid, callingPackageName);

6107

6108

if (timeoutMs < 0) {

6109

throw new IllegalArgumentException("Bad timeout specified");

6110

}

6111

ensureValid(networkCapabilities);

6112

6113

final NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType,

6114

nextNetworkRequestId(), reqType);

6115

final NetworkRequestInfo nri = getNriToRegister(

6116

asUid, networkRequest, messenger, binder, callbackFlags,

6117

callingAttributionTag);

6118

if (DBG) log("requestNetwork for " + nri);

6119

6120

// For TRACK_SYSTEM_DEFAULT callbacks, the capabilities have been modified since they were

6121

// copied from the default request above. (This is necessary to ensure, for example, that

6122

// the callback does not leak sensitive information to unprivileged apps.) Check that the

6123

// changes don't alter request matching.

6124

if (reqType == NetworkRequest.Type.TRACK_SYSTEM_DEFAULT &&

6125

(!networkCapabilities.equalRequestableCapabilities(defaultNc))) {

6126

throw new IllegalStateException(

6127

"TRACK_SYSTEM_DEFAULT capabilities don't match default request: "

6128

+ networkCapabilities + " vs. " + defaultNc);

6129

}

6130

6131

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri));

6132

if (timeoutMs > 0) {

6133

mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST,

6134

nri), timeoutMs);

6135

}

6136

return networkRequest;

}

/**

* Return the nri to be used when registering a network request. Specifically, this is used with

6141

* requests registered to track the default request. If there is currently a per-app default

6142

* tracking the app requestor, then we need to create a version of this nri that mirrors that of

6143

* the tracking per-app default so that callbacks are sent to the app requestor appropriately.

6144

* @param asUid the uid on behalf of which to file the request. Different from requestorUid

6145

* when a privileged caller is tracking the default network for another uid.

6146

* @param nr the network request for the nri.

6147

* @param msgr the messenger for the nri.

6148

* @param binder the binder for the nri.

6149

* @param callingAttributionTag the calling attribution tag for the nri.

6150

* @return the nri to register.

6151

*/

6152

private NetworkRequestInfo getNriToRegister(final int asUid, @NonNull final NetworkRequest nr,

6153

@Nullable final Messenger msgr, @Nullable final IBinder binder,

6154

@NetworkCallback.Flag int callbackFlags,

6155

@Nullable String callingAttributionTag) {

6156

final List<NetworkRequest> requests;

6157

if (NetworkRequest.Type.TRACK_DEFAULT == nr.type) {

6158

requests = copyDefaultNetworkRequestsForUid(

6159

asUid, nr.getRequestorUid(), nr.getRequestorPackageName());

6160

} else {

6161

requests = Collections.singletonList(nr);

6162

}

6163

return new NetworkRequestInfo(

6164

asUid, requests, nr, msgr, binder, callbackFlags, callingAttributionTag);

6165

}

6166

6167

private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities,

6168

String callingPackageName, String callingAttributionTag) {

6169

if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) {

6170

enforceConnectivityRestrictedNetworksPermission();

6171

} else {

6172

enforceChangePermission(callingPackageName, callingAttributionTag);

}

}

@Override

public boolean requestBandwidthUpdate(Network network) {

6178

enforceAccessPermission();

6179

NetworkAgentInfo nai = null;

6180

if (network == null) {

6181

return false;

6182

}

6183

synchronized (mNetworkForNetId) {

6184

nai = mNetworkForNetId.get(network.getNetId());

6185

}

6186

if (nai != null) {

6187

nai.onBandwidthUpdateRequested();

6188

synchronized (mBandwidthRequests) {

6189

final int uid = mDeps.getCallingUid();

6190

Integer uidReqs = mBandwidthRequests.get(uid);

6191

if (uidReqs == null) {

6192

uidReqs = 0;

6193

}

6194

mBandwidthRequests.put(uid, ++uidReqs);

}

return true;

}

return false;

}

private boolean isSystem(int uid) {

6202

return uid < Process.FIRST_APPLICATION_UID;

6203

}

6204

6205

private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) {

6206

final int uid = mDeps.getCallingUid();

6207

if (isSystem(uid)) {

6208

// Exemption for system uid.

6209

return;

6210

}

6211

if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED)) {

6212

// Policy already enforced.

6213

return;

6214

}

6215

final long ident = Binder.clearCallingIdentity();

6216

try {

6217

if (mPolicyManager.isUidRestrictedOnMeteredNetworks(uid)) {

6218

// If UID is restricted, don't allow them to bring up metered APNs.

6219

networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED);

6220

}

6221

} finally {

6222

Binder.restoreCallingIdentity(ident);

}

}

@Override

public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities,

6228

PendingIntent operation, @NonNull String callingPackageName,

6229

@Nullable String callingAttributionTag) {

6230

Objects.requireNonNull(operation, "PendingIntent cannot be null.");

6231

final int callingUid = mDeps.getCallingUid();

6232

networkCapabilities = new NetworkCapabilities(networkCapabilities);

6233

enforceNetworkRequestPermissions(networkCapabilities, callingPackageName,

6234

callingAttributionTag);

6235

enforceMeteredApnPolicy(networkCapabilities);

6236

ensureRequestableCapabilities(networkCapabilities);

6237

ensureSufficientPermissionsForRequest(networkCapabilities,

6238

Binder.getCallingPid(), callingUid, callingPackageName);

6239

ensureValidNetworkSpecifier(networkCapabilities);

6240

restrictRequestUidsForCallerAndSetRequestorInfo(networkCapabilities,

6241

callingUid, callingPackageName);

6242

6243

NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE,

6244

nextNetworkRequestId(), NetworkRequest.Type.REQUEST);

6245

NetworkRequestInfo nri = new NetworkRequestInfo(callingUid, networkRequest, operation,

6246

callingAttributionTag);

6247

if (DBG) log("pendingRequest for " + nri);

6248

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT,

6249

nri));

6250

return networkRequest;

6251

}

6252

6253

private void releasePendingNetworkRequestWithDelay(PendingIntent operation) {

6254

mHandler.sendMessageDelayed(

6255

mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT,

6256

mDeps.getCallingUid(), 0, operation), mReleasePendingIntentDelayMs);

}

@Override

public void releasePendingNetworkRequest(PendingIntent operation) {

6261

Objects.requireNonNull(operation, "PendingIntent cannot be null.");

6262

mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT,

6263

mDeps.getCallingUid(), 0, operation));

6264

}

6265

6266

// In order to implement the compatibility measure for pre-M apps that call

6267

// WifiManager.enableNetwork(..., true) without also binding to that network explicitly,

6268

// WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork.

6269

// This ensures it has permission to do so.

6270

private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) {

if (nc == null) {

return false;

}

int[] transportTypes = nc.getTransportTypes();

6275

if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) {

return false;

}

try {

mContext.enforceCallingOrSelfPermission(

6280

android.Manifest.permission.ACCESS_WIFI_STATE,

6281

"ConnectivityService");

6282

} catch (SecurityException e) {

return false;

}

return true;

}

@Override

public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities,

6290

Messenger messenger, IBinder binder,

6291

@NetworkCallback.Flag int callbackFlags,

6292

@NonNull String callingPackageName, @NonNull String callingAttributionTag) {

6293

final int callingUid = mDeps.getCallingUid();

6294

if (!hasWifiNetworkListenPermission(networkCapabilities)) {

6295

enforceAccessPermission();

6296

}

6297

6298

NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities);

6299

ensureSufficientPermissionsForRequest(networkCapabilities,

6300

Binder.getCallingPid(), callingUid, callingPackageName);

6301

restrictRequestUidsForCallerAndSetRequestorInfo(nc, callingUid, callingPackageName);

6302

// Apps without the CHANGE_NETWORK_STATE permission can't use background networks, so

6303

// make all their listens include NET_CAPABILITY_FOREGROUND. That way, they will get

6304

// onLost and onAvailable callbacks when networks move in and out of the background.

6305

// There is no need to do this for requests because an app without CHANGE_NETWORK_STATE

6306

// can't request networks.

6307

restrictBackgroundRequestForCaller(nc);

6308

ensureValid(nc);

6309

6310

NetworkRequest networkRequest = new NetworkRequest(nc, TYPE_NONE, nextNetworkRequestId(),

6311

NetworkRequest.Type.LISTEN);

6312

NetworkRequestInfo nri =

6313

new NetworkRequestInfo(callingUid, networkRequest, messenger, binder, callbackFlags,

6314

callingAttributionTag);

6315

if (VDBG) log("listenForNetwork for " + nri);

6316

6317

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri));

6318

return networkRequest;

}

@Override

public void pendingListenForNetwork(NetworkCapabilities networkCapabilities,

6323

PendingIntent operation, @NonNull String callingPackageName,

6324

@Nullable String callingAttributionTag) {

6325

Objects.requireNonNull(operation, "PendingIntent cannot be null.");

6326

final int callingUid = mDeps.getCallingUid();

6327

if (!hasWifiNetworkListenPermission(networkCapabilities)) {

6328

enforceAccessPermission();

6329

}

6330

ensureValid(networkCapabilities);

6331

ensureSufficientPermissionsForRequest(networkCapabilities,

6332

Binder.getCallingPid(), callingUid, callingPackageName);

6333

final NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities);

6334

restrictRequestUidsForCallerAndSetRequestorInfo(nc, callingUid, callingPackageName);

6335

6336

NetworkRequest networkRequest = new NetworkRequest(nc, TYPE_NONE, nextNetworkRequestId(),

6337

NetworkRequest.Type.LISTEN);

6338

NetworkRequestInfo nri = new NetworkRequestInfo(callingUid, networkRequest, operation,

6339

callingAttributionTag);

6340

if (VDBG) log("pendingListenForNetwork for " + nri);

6341

WeiZhang

1cc3f17

2021-06-03 19:02:04 -0500

[diff] [blame]

6342

mHandler.sendMessage(mHandler.obtainMessage(

6343

EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT, nri));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6344

}

6345

6346

/** Returns the next Network provider ID. */

6347

public final int nextNetworkProviderId() {

6348

return mNextNetworkProviderId.getAndIncrement();

6349

}

6350

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6351

@Override

6352

public void releaseNetworkRequest(NetworkRequest networkRequest) {

6353

ensureNetworkRequestHasType(networkRequest);

6354

mHandler.sendMessage(mHandler.obtainMessage(

6355

EVENT_RELEASE_NETWORK_REQUEST, mDeps.getCallingUid(), 0, networkRequest));

6356

}

6357

6358

private void handleRegisterNetworkProvider(NetworkProviderInfo npi) {

6359

if (mNetworkProviderInfos.containsKey(npi.messenger)) {

6360

// Avoid creating duplicates. even if an app makes a direct AIDL call.

6361

// This will never happen if an app calls ConnectivityManager#registerNetworkProvider,

6362

// as that will throw if a duplicate provider is registered.

6363

loge("Attempt to register existing NetworkProviderInfo "

6364

+ mNetworkProviderInfos.get(npi.messenger).name);

return;

}

if (DBG) log("Got NetworkProvider Messenger for " + npi.name);

6369

mNetworkProviderInfos.put(npi.messenger, npi);

6370

npi.connect(mContext, mTrackerHandler);

}

@Override

public int registerNetworkProvider(Messenger messenger, String name) {

6375

enforceNetworkFactoryOrSettingsPermission();

6376

Objects.requireNonNull(messenger, "messenger must be non-null");

6377

NetworkProviderInfo npi = new NetworkProviderInfo(name, messenger,

6378

nextNetworkProviderId(), () -> unregisterNetworkProvider(messenger));

6379

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_PROVIDER, npi));

6380

return npi.providerId;

}

@Override

public void unregisterNetworkProvider(Messenger messenger) {

6385

enforceNetworkFactoryOrSettingsPermission();

6386

mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_PROVIDER, messenger));

}

@Override

public void offerNetwork(final int providerId,

6391

@NonNull final NetworkScore score, @NonNull final NetworkCapabilities caps,

6392

@NonNull final INetworkOfferCallback callback) {

6393

Objects.requireNonNull(score);

6394

Objects.requireNonNull(caps);

6395

Objects.requireNonNull(callback);

6396

final NetworkOffer offer = new NetworkOffer(

6397

FullScore.makeProspectiveScore(score, caps), caps, callback, providerId);

6398

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_OFFER, offer));

}

@Override

public void unofferNetwork(@NonNull final INetworkOfferCallback callback) {

6403

mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_OFFER, callback));

6404

}

6405

6406

private void handleUnregisterNetworkProvider(Messenger messenger) {

6407

NetworkProviderInfo npi = mNetworkProviderInfos.remove(messenger);

6408

if (npi == null) {

6409

loge("Failed to find Messenger in unregisterNetworkProvider");

6410

return;

6411

}

6412

// Unregister all the offers from this provider

6413

final ArrayList<NetworkOfferInfo> toRemove = new ArrayList<>();

6414

for (final NetworkOfferInfo noi : mNetworkOffers) {

6415

if (noi.offer.providerId == npi.providerId) {

6416

// Can't call handleUnregisterNetworkOffer here because iteration is in progress

toRemove.add(noi);

}

}

for (final NetworkOfferInfo noi : toRemove) {

6421

handleUnregisterNetworkOffer(noi);

6422

}

6423

if (DBG) log("unregisterNetworkProvider for " + npi.name);

}

@Override

public void declareNetworkRequestUnfulfillable(@NonNull final NetworkRequest request) {

6428

if (request.hasTransport(TRANSPORT_TEST)) {

6429

enforceNetworkFactoryOrTestNetworksPermission();

6430

} else {

6431

enforceNetworkFactoryPermission();

6432

}

6433

final NetworkRequestInfo nri = mNetworkRequests.get(request);

6434

if (nri != null) {

6435

// declareNetworkRequestUnfulfillable() paths don't apply to multilayer requests.

6436

ensureNotMultilayerRequest(nri, "declareNetworkRequestUnfulfillable");

6437

mHandler.post(() -> handleReleaseNetworkRequest(

6438

nri.mRequests.get(0), mDeps.getCallingUid(), true));

}

}

// NOTE: Accessed on multiple threads, must be synchronized on itself.

6443

@GuardedBy("mNetworkForNetId")

6444

private final SparseArray<NetworkAgentInfo> mNetworkForNetId = new SparseArray<>();

6445

// NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId.

6446

// An entry is first reserved with NetIdManager, prior to being added to mNetworkForNetId, so

6447

// there may not be a strict 1:1 correlation between the two.

6448

private final NetIdManager mNetIdManager;

6449

Lorenzo Colitti

b4bf015

2021-06-07 15:32:04 +0900

[diff] [blame]

6450

// Tracks all NetworkAgents that are currently registered.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6451

// NOTE: Only should be accessed on ConnectivityServiceThread, except dump().

6452

private final ArraySet<NetworkAgentInfo> mNetworkAgentInfos = new ArraySet<>();

6453

6454

// UID ranges for users that are currently blocked by VPNs.

6455

// This array is accessed and iterated on multiple threads without holding locks, so its

6456

// contents must never be mutated. When the ranges change, the array is replaced with a new one

6457

// (on the handler thread).

6458

private volatile List<UidRange> mVpnBlockedUidRanges = new ArrayList<>();

6459

6460

// Must only be accessed on the handler thread

6461

@NonNull

6462

private final ArrayList<NetworkOfferInfo> mNetworkOffers = new ArrayList<>();

6463

6464

@GuardedBy("mBlockedAppUids")

6465

private final HashSet<Integer> mBlockedAppUids = new HashSet<>();

6466

6467

// Current OEM network preferences. This object must only be written to on the handler thread.

6468

// Since it is immutable and always non-null, other threads may read it if they only care

6469

// about seeing a consistent object but not that it is current.

6470

@NonNull

6471

private OemNetworkPreferences mOemNetworkPreferences =

6472

new OemNetworkPreferences.Builder().build();

6473

// Current per-profile network preferences. This object follows the same threading rules as

6474

// the OEM network preferences above.

6475

@NonNull

6476

private ProfileNetworkPreferences mProfileNetworkPreferences = new ProfileNetworkPreferences();

6477

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

6478

// A set of UIDs that should use mobile data preferentially if available. This object follows

6479

// the same threading rules as the OEM network preferences above.

6480

@NonNull

6481

private Set<Integer> mMobileDataPreferredUids = new ArraySet<>();

6482

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6483

// OemNetworkPreferences activity String log entries.

6484

private static final int MAX_OEM_NETWORK_PREFERENCE_LOGS = 20;

6485

@NonNull

6486

private final LocalLog mOemNetworkPreferencesLogs =

6487

new LocalLog(MAX_OEM_NETWORK_PREFERENCE_LOGS);

6488

6489

/**

6490

* Determine whether a given package has a mapping in the current OemNetworkPreferences.

6491

* @param packageName the package name to check existence of a mapping for.

6492

* @return true if a mapping exists, false otherwise

6493

*/

6494

private boolean isMappedInOemNetworkPreference(@NonNull final String packageName) {

6495

return mOemNetworkPreferences.getNetworkPreferences().containsKey(packageName);

6496

}

6497

6498

// The always-on request for an Internet-capable network that apps without a specific default

// fall back to.

@VisibleForTesting

@NonNull

final NetworkRequestInfo mDefaultRequest;

6503

// Collection of NetworkRequestInfo's used for default networks.

6504

@VisibleForTesting

6505

@NonNull

6506

final ArraySet<NetworkRequestInfo> mDefaultNetworkRequests = new ArraySet<>();

6507

6508

private boolean isPerAppDefaultRequest(@NonNull final NetworkRequestInfo nri) {

6509

return (mDefaultNetworkRequests.contains(nri) && mDefaultRequest != nri);

}

/**

* Return the default network request currently tracking the given uid.

6514

* @param uid the uid to check.

6515

* @return the NetworkRequestInfo tracking the given uid.

6516

*/

6517

@NonNull

6518

private NetworkRequestInfo getDefaultRequestTrackingUid(final int uid) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6519

NetworkRequestInfo highestPriorityNri = mDefaultRequest;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6520

for (final NetworkRequestInfo nri : mDefaultNetworkRequests) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6521

// Checking the first request is sufficient as only multilayer requests will have more

6522

// than one request and for multilayer, all requests will track the same uids.

6523

if (nri.mRequests.get(0).networkCapabilities.appliesToUid(uid)) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6524

// Find out the highest priority request.

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

6525

if (nri.hasHigherOrderThan(highestPriorityNri)) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6526

highestPriorityNri = nri;

6527

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6528

}

6529

}

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6530

return highestPriorityNri;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

/**

* Get a copy of the network requests of the default request that is currently tracking the

6535

* given uid.

6536

* @param asUid the uid on behalf of which to file the request. Different from requestorUid

6537

* when a privileged caller is tracking the default network for another uid.

6538

* @param requestorUid the uid to check the default for.

6539

* @param requestorPackageName the requestor's package name.

6540

* @return a copy of the default's NetworkRequest that is tracking the given uid.

6541

*/

6542

@NonNull

6543

private List<NetworkRequest> copyDefaultNetworkRequestsForUid(

6544

final int asUid, final int requestorUid, @NonNull final String requestorPackageName) {

6545

return copyNetworkRequestsForUid(

6546

getDefaultRequestTrackingUid(asUid).mRequests,

6547

asUid, requestorUid, requestorPackageName);

}

/**

* Copy the given nri's NetworkRequest collection.

6552

* @param requestsToCopy the NetworkRequest collection to be copied.

6553

* @param asUid the uid on behalf of which to file the request. Different from requestorUid

6554

* when a privileged caller is tracking the default network for another uid.

6555

* @param requestorUid the uid to set on the copied collection.

6556

* @param requestorPackageName the package name to set on the copied collection.

6557

* @return the copied NetworkRequest collection.

6558

*/

6559

@NonNull

6560

private List<NetworkRequest> copyNetworkRequestsForUid(

6561

@NonNull final List<NetworkRequest> requestsToCopy, final int asUid,

6562

final int requestorUid, @NonNull final String requestorPackageName) {

6563

final List<NetworkRequest> requests = new ArrayList<>();

6564

for (final NetworkRequest nr : requestsToCopy) {

6565

requests.add(new NetworkRequest(copyDefaultNetworkCapabilitiesForUid(

6566

nr.networkCapabilities, asUid, requestorUid, requestorPackageName),

6567

nr.legacyType, nextNetworkRequestId(), nr.type));

}

return requests;

}

@NonNull

private NetworkCapabilities copyDefaultNetworkCapabilitiesForUid(

6574

@NonNull final NetworkCapabilities netCapToCopy, final int asUid,

6575

final int requestorUid, @NonNull final String requestorPackageName) {

6576

// These capabilities are for a TRACK_DEFAULT callback, so:

6577

// 1. Remove NET_CAPABILITY_VPN, because it's (currently!) the only difference between

6578

// mDefaultRequest and a per-UID default request.

6579

// TODO: stop depending on the fact that these two unrelated things happen to be the same

6580

// 2. Always set the UIDs to asUid. restrictRequestUidsForCallerAndSetRequestorInfo will

6581

// not do this in the case of a privileged application.

6582

final NetworkCapabilities netCap = new NetworkCapabilities(netCapToCopy);

6583

netCap.removeCapability(NET_CAPABILITY_NOT_VPN);

6584

netCap.setSingleUid(asUid);

6585

restrictRequestUidsForCallerAndSetRequestorInfo(

6586

netCap, requestorUid, requestorPackageName);

return netCap;

}

/**

* Get the nri that is currently being tracked for callbacks by per-app defaults.

6592

* @param nr the network request to check for equality against.

6593

* @return the nri if one exists, null otherwise.

6594

*/

6595

@Nullable

6596

private NetworkRequestInfo getNriForAppRequest(@NonNull final NetworkRequest nr) {

6597

for (final NetworkRequestInfo nri : mNetworkRequests.values()) {

6598

if (nri.getNetworkRequestForCallback().equals(nr)) {

return nri;

}

}

return null;

}

/**

* Check if an nri is currently being managed by per-app default networking.

6607

* @param nri the nri to check.

6608

* @return true if this nri is currently being managed by per-app default networking.

6609

*/

6610

private boolean isPerAppTrackedNri(@NonNull final NetworkRequestInfo nri) {

6611

// nri.mRequests.get(0) is only different from the original request filed in

6612

// nri.getNetworkRequestForCallback() if nri.mRequests was changed by per-app default

6613

// functionality therefore if these two don't match, it means this particular nri is

6614

// currently being managed by a per-app default.

6615

return nri.getNetworkRequestForCallback() != nri.mRequests.get(0);

}

/**

* Determine if an nri is a managed default request that disallows default networking.

6620

* @param nri the request to evaluate

6621

* @return true if device-default networking is disallowed

6622

*/

6623

private boolean isDefaultBlocked(@NonNull final NetworkRequestInfo nri) {

6624

// Check if this nri is a managed default that supports the default network at its

6625

// lowest priority request.

6626

final NetworkRequest defaultNetworkRequest = mDefaultRequest.mRequests.get(0);

6627

final NetworkCapabilities lowestPriorityNetCap =

6628

nri.mRequests.get(nri.mRequests.size() - 1).networkCapabilities;

6629

return isPerAppDefaultRequest(nri)

6630

&& !(defaultNetworkRequest.networkCapabilities.equalRequestableCapabilities(

6631

lowestPriorityNetCap));

6632

}

6633

6634

// Request used to optionally keep mobile data active even when higher

6635

// priority networks like Wi-Fi are active.

6636

private final NetworkRequest mDefaultMobileDataRequest;

6637

6638

// Request used to optionally keep wifi data active even when higher

6639

// priority networks like ethernet are active.

6640

private final NetworkRequest mDefaultWifiRequest;

6641

6642

// Request used to optionally keep vehicle internal network always active

6643

private final NetworkRequest mDefaultVehicleRequest;

6644

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6645

// Sentinel NAI used to direct apps with default networks that should have no connectivity to a

6646

// network with no service. This NAI should never be matched against, nor should any public API

6647

// ever return the associated network. For this reason, this NAI is not in the list of available

6648

// NAIs. It is used in computeNetworkReassignment() to be set as the satisfier for non-device

6649

// default requests that don't support using the device default network which will ultimately

6650

// allow ConnectivityService to use this no-service network when calling makeDefaultForApps().

6651

@VisibleForTesting

6652

final NetworkAgentInfo mNoServiceNetwork;

6653

6654

// The NetworkAgentInfo currently satisfying the default request, if any.

6655

private NetworkAgentInfo getDefaultNetwork() {

6656

return mDefaultRequest.mSatisfier;

6657

}

6658

6659

private NetworkAgentInfo getDefaultNetworkForUid(final int uid) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6660

NetworkRequestInfo highestPriorityNri = mDefaultRequest;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6661

for (final NetworkRequestInfo nri : mDefaultNetworkRequests) {

6662

// Currently, all network requests will have the same uids therefore checking the first

6663

// one is sufficient. If/when uids are tracked at the nri level, this can change.

6664

final Set<UidRange> uids = nri.mRequests.get(0).networkCapabilities.getUidRanges();

if (null == uids) {

continue;

}

for (final UidRange range : uids) {

6669

if (range.contains(uid)) {

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

6670

if (nri.hasHigherOrderThan(highestPriorityNri)) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6671

highestPriorityNri = nri;

6672

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6673

}

6674

}

6675

}

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6676

return highestPriorityNri.getSatisfier();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

@Nullable

private Network getNetwork(@Nullable NetworkAgentInfo nai) {

6681

return nai != null ? nai.network : null;

6682

}

6683

6684

private void ensureRunningOnConnectivityServiceThread() {

6685

if (mHandler.getLooper().getThread() != Thread.currentThread()) {

6686

throw new IllegalStateException(

6687

"Not running on ConnectivityService thread: "

6688

+ Thread.currentThread().getName());

}

}

@VisibleForTesting

protected boolean isDefaultNetwork(NetworkAgentInfo nai) {

6694

return nai == getDefaultNetwork();

}

/**

* Register a new agent with ConnectivityService to handle a network.

6699

*

6700

* @param na a reference for ConnectivityService to contact the agent asynchronously.

6701

* @param networkInfo the initial info associated with this network. It can be updated later :

6702

* see {@link #updateNetworkInfo}.

6703

* @param linkProperties the initial link properties of this network. They can be updated

6704

* later : see {@link #updateLinkProperties}.

6705

* @param networkCapabilities the initial capabilites of this network. They can be updated

6706

* later : see {@link #updateCapabilities}.

6707

* @param initialScore the initial score of the network. See

6708

* {@link NetworkAgentInfo#getCurrentScore}.

6709

* @param networkAgentConfig metadata about the network. This is never updated.

6710

* @param providerId the ID of the provider owning this NetworkAgent.

6711

* @return the network created for this agent.

6712

*/

6713

public Network registerNetworkAgent(INetworkAgent na, NetworkInfo networkInfo,

6714

LinkProperties linkProperties, NetworkCapabilities networkCapabilities,

6715

@NonNull NetworkScore initialScore, NetworkAgentConfig networkAgentConfig,

6716

int providerId) {

6717

Objects.requireNonNull(networkInfo, "networkInfo must not be null");

6718

Objects.requireNonNull(linkProperties, "linkProperties must not be null");

6719

Objects.requireNonNull(networkCapabilities, "networkCapabilities must not be null");

6720

Objects.requireNonNull(initialScore, "initialScore must not be null");

6721

Objects.requireNonNull(networkAgentConfig, "networkAgentConfig must not be null");

6722

if (networkCapabilities.hasTransport(TRANSPORT_TEST)) {

6723

enforceAnyPermissionOf(Manifest.permission.MANAGE_TEST_NETWORKS);

6724

} else {

6725

enforceNetworkFactoryPermission();

6726

}

6727

6728

final int uid = mDeps.getCallingUid();

6729

final long token = Binder.clearCallingIdentity();

6730

try {

6731

return registerNetworkAgentInternal(na, networkInfo, linkProperties,

6732

networkCapabilities, initialScore, networkAgentConfig, providerId, uid);

6733

} finally {

6734

Binder.restoreCallingIdentity(token);

}

}

private Network registerNetworkAgentInternal(INetworkAgent na, NetworkInfo networkInfo,

6739

LinkProperties linkProperties, NetworkCapabilities networkCapabilities,

6740

NetworkScore currentScore, NetworkAgentConfig networkAgentConfig, int providerId,

6741

int uid) {

6742

if (networkCapabilities.hasTransport(TRANSPORT_TEST)) {

6743

// Strictly, sanitizing here is unnecessary as the capabilities will be sanitized in

6744

// the call to mixInCapabilities below anyway, but sanitizing here means the NAI never

6745

// sees capabilities that may be malicious, which might prevent mistakes in the future.

6746

networkCapabilities = new NetworkCapabilities(networkCapabilities);

6747

networkCapabilities.restrictCapabilitesForTestNetwork(uid);

6748

}

6749

6750

LinkProperties lp = new LinkProperties(linkProperties);

6751

6752

final NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities);

6753

final NetworkAgentInfo nai = new NetworkAgentInfo(na,

6754

new Network(mNetIdManager.reserveNetId()), new NetworkInfo(networkInfo), lp, nc,

6755

currentScore, mContext, mTrackerHandler, new NetworkAgentConfig(networkAgentConfig),

6756

this, mNetd, mDnsResolver, providerId, uid, mLingerDelayMs,

6757

mQosCallbackTracker, mDeps);

6758

6759

// Make sure the LinkProperties and NetworkCapabilities reflect what the agent info says.

6760

processCapabilitiesFromAgent(nai, nc);

6761

nai.getAndSetNetworkCapabilities(mixInCapabilities(nai, nc));

6762

processLinkPropertiesFromAgent(nai, nai.linkProperties);

6763

6764

final String extraInfo = networkInfo.getExtraInfo();

6765

final String name = TextUtils.isEmpty(extraInfo)

6766

? nai.networkCapabilities.getSsid() : extraInfo;

6767

if (DBG) log("registerNetworkAgent " + nai);

6768

mDeps.getNetworkStack().makeNetworkMonitor(

6769

nai.network, name, new NetworkMonitorCallbacks(nai));

6770

// NetworkAgentInfo registration will finish when the NetworkMonitor is created.

6771

// If the network disconnects or sends any other event before that, messages are deferred by

6772

// NetworkAgent until nai.connect(), which will be called when finalizing the

// registration.

return nai.network;

}

private void handleRegisterNetworkAgent(NetworkAgentInfo nai, INetworkMonitor networkMonitor) {

6778

nai.onNetworkMonitorCreated(networkMonitor);

6779

if (VDBG) log("Got NetworkAgent Messenger");

6780

mNetworkAgentInfos.add(nai);

6781

synchronized (mNetworkForNetId) {

6782

mNetworkForNetId.put(nai.network.getNetId(), nai);

}

try {

networkMonitor.start();

6787

} catch (RemoteException e) {

6788

e.rethrowAsRuntimeException();

6789

}

6790

nai.notifyRegistered();

6791

NetworkInfo networkInfo = nai.networkInfo;

6792

updateNetworkInfo(nai, networkInfo);

6793

updateUids(nai, null, nai.networkCapabilities);

6794

}

6795

6796

private class NetworkOfferInfo implements IBinder.DeathRecipient {

6797

@NonNull public final NetworkOffer offer;

6798

6799

NetworkOfferInfo(@NonNull final NetworkOffer offer) {

this.offer = offer;

}

@Override

public void binderDied() {

6805

mHandler.post(() -> handleUnregisterNetworkOffer(this));

}

}

private boolean isNetworkProviderWithIdRegistered(final int providerId) {

6810

for (final NetworkProviderInfo npi : mNetworkProviderInfos.values()) {

6811

if (npi.providerId == providerId) return true;

}

return false;

}

/**

* Register or update a network offer.

6818

* @param newOffer The new offer. If the callback member is the same as an existing

6819

* offer, it is an update of that offer.

6820

*/

6821

private void handleRegisterNetworkOffer(@NonNull final NetworkOffer newOffer) {

6822

ensureRunningOnConnectivityServiceThread();

6823

if (!isNetworkProviderWithIdRegistered(newOffer.providerId)) {

6824

// This may actually happen if a provider updates its score or registers and then

6825

// immediately unregisters. The offer would still be in the handler queue, but the

6826

// provider would have been removed.

6827

if (DBG) log("Received offer from an unregistered provider");

6828

return;

6829

}

6830

final NetworkOfferInfo existingOffer = findNetworkOfferInfoByCallback(newOffer.callback);

6831

if (null != existingOffer) {

6832

handleUnregisterNetworkOffer(existingOffer);

6833

newOffer.migrateFrom(existingOffer.offer);

6834

}

6835

final NetworkOfferInfo noi = new NetworkOfferInfo(newOffer);

6836

try {

6837

noi.offer.callback.asBinder().linkToDeath(noi, 0 /* flags */);

6838

} catch (RemoteException e) {

noi.binderDied();

return;

}

mNetworkOffers.add(noi);

6843

issueNetworkNeeds(noi);

6844

}

6845

6846

private void handleUnregisterNetworkOffer(@NonNull final NetworkOfferInfo noi) {

6847

ensureRunningOnConnectivityServiceThread();

6848

mNetworkOffers.remove(noi);

6849

noi.offer.callback.asBinder().unlinkToDeath(noi, 0 /* flags */);

6850

}

6851

6852

@Nullable private NetworkOfferInfo findNetworkOfferInfoByCallback(

6853

@NonNull final INetworkOfferCallback callback) {

6854

ensureRunningOnConnectivityServiceThread();

6855

for (final NetworkOfferInfo noi : mNetworkOffers) {

6856

if (noi.offer.callback.asBinder().equals(callback.asBinder())) return noi;

}

return null;

}

/**

* Called when receiving LinkProperties directly from a NetworkAgent.

6863

* Stores into |nai| any data coming from the agent that might also be written to the network's

6864

* LinkProperties by ConnectivityService itself. This ensures that the data provided by the

6865

* agent is not lost when updateLinkProperties is called.

6866

* This method should never alter the agent's LinkProperties, only store data in |nai|.

6867

*/

6868

private void processLinkPropertiesFromAgent(NetworkAgentInfo nai, LinkProperties lp) {

6869

lp.ensureDirectlyConnectedRoutes();

6870

nai.clatd.setNat64PrefixFromRa(lp.getNat64Prefix());

6871

nai.networkAgentPortalData = lp.getCaptivePortalData();

6872

}

6873

6874

private void updateLinkProperties(NetworkAgentInfo networkAgent, @NonNull LinkProperties newLp,

6875

@NonNull LinkProperties oldLp) {

6876

int netId = networkAgent.network.getNetId();

6877

6878

// The NetworkAgent does not know whether clatd is running on its network or not, or whether

6879

// a NAT64 prefix was discovered by the DNS resolver. Before we do anything else, make sure

6880

// the LinkProperties for the network are accurate.

6881

networkAgent.clatd.fixupLinkProperties(oldLp, newLp);

6882

6883

updateInterfaces(newLp, oldLp, netId, networkAgent.networkCapabilities);

6884

6885

// update filtering rules, need to happen after the interface update so netd knows about the

6886

// new interface (the interface name -> index map becomes initialized)

6887

updateVpnFiltering(newLp, oldLp, networkAgent);

6888

6889

updateMtu(newLp, oldLp);

6890

// TODO - figure out what to do for clat

6891

// for (LinkProperties lp : newLp.getStackedLinks()) {

6892

// updateMtu(lp, null);

6893

// }

6894

if (isDefaultNetwork(networkAgent)) {

6895

updateTcpBufferSizes(newLp.getTcpBufferSizes());

6896

}

6897

6898

updateRoutes(newLp, oldLp, netId);

6899

updateDnses(newLp, oldLp, netId);

6900

// Make sure LinkProperties represents the latest private DNS status.

6901

// This does not need to be done before updateDnses because the

6902

// LinkProperties are not the source of the private DNS configuration.

6903

// updateDnses will fetch the private DNS configuration from DnsManager.

6904

mDnsManager.updatePrivateDnsStatus(netId, newLp);

6905

6906

if (isDefaultNetwork(networkAgent)) {

6907

handleApplyDefaultProxy(newLp.getHttpProxy());

6908

} else {

6909

updateProxy(newLp, oldLp);

6910

}

6911

6912

updateWakeOnLan(newLp);

6913

6914

// Captive portal data is obtained from NetworkMonitor and stored in NetworkAgentInfo.

6915

// It is not always contained in the LinkProperties sent from NetworkAgents, and if it

6916

// does, it needs to be merged here.

6917

newLp.setCaptivePortalData(mergeCaptivePortalData(networkAgent.networkAgentPortalData,

6918

networkAgent.capportApiData));

6919

6920

// TODO - move this check to cover the whole function

6921

if (!Objects.equals(newLp, oldLp)) {

6922

synchronized (networkAgent) {

6923

networkAgent.linkProperties = newLp;

6924

}

6925

// Start or stop DNS64 detection and 464xlat according to network state.

6926

networkAgent.clatd.update();

6927

notifyIfacesChangedForNetworkStats();

6928

networkAgent.networkMonitor().notifyLinkPropertiesChanged(

6929

new LinkProperties(newLp, true /* parcelSensitiveFields */));

6930

if (networkAgent.everConnected) {

6931

notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED);

}

}

mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent);

}

/**

* @param naData captive portal data from NetworkAgent

6940

* @param apiData captive portal data from capport API

6941

*/

6942

@Nullable

6943

private CaptivePortalData mergeCaptivePortalData(CaptivePortalData naData,

6944

CaptivePortalData apiData) {

6945

if (naData == null || apiData == null) {

6946

return naData == null ? apiData : naData;

6947

}

6948

final CaptivePortalData.Builder captivePortalBuilder =

6949

new CaptivePortalData.Builder(naData);

6950

6951

if (apiData.isCaptive()) {

6952

captivePortalBuilder.setCaptive(true);

6953

}

6954

if (apiData.isSessionExtendable()) {

6955

captivePortalBuilder.setSessionExtendable(true);

6956

}

6957

if (apiData.getExpiryTimeMillis() >= 0 || apiData.getByteLimit() >= 0) {

6958

// Expiry time, bytes remaining, refresh time all need to come from the same source,

6959

// otherwise data would be inconsistent. Prefer the capport API info if present,

6960

// as it can generally be refreshed more often.

6961

captivePortalBuilder.setExpiryTime(apiData.getExpiryTimeMillis());

6962

captivePortalBuilder.setBytesRemaining(apiData.getByteLimit());

6963

captivePortalBuilder.setRefreshTime(apiData.getRefreshTimeMillis());

6964

} else if (naData.getExpiryTimeMillis() < 0 && naData.getByteLimit() < 0) {

6965

// No source has time / bytes remaining information: surface the newest refresh time

6966

// for other fields

6967

captivePortalBuilder.setRefreshTime(

6968

Math.max(naData.getRefreshTimeMillis(), apiData.getRefreshTimeMillis()));

6969

}

6970

6971

// Prioritize the user portal URL from the network agent if the source is authenticated.

6972

if (apiData.getUserPortalUrl() != null && naData.getUserPortalUrlSource()

6973

!= CaptivePortalData.CAPTIVE_PORTAL_DATA_SOURCE_PASSPOINT) {

6974

captivePortalBuilder.setUserPortalUrl(apiData.getUserPortalUrl(),

6975

apiData.getUserPortalUrlSource());

6976

}

6977

// Prioritize the venue information URL from the network agent if the source is

6978

// authenticated.

6979

if (apiData.getVenueInfoUrl() != null && naData.getVenueInfoUrlSource()

6980

!= CaptivePortalData.CAPTIVE_PORTAL_DATA_SOURCE_PASSPOINT) {

6981

captivePortalBuilder.setVenueInfoUrl(apiData.getVenueInfoUrl(),

6982

apiData.getVenueInfoUrlSource());

6983

}

6984

return captivePortalBuilder.build();

6985

}

6986

6987

private void wakeupModifyInterface(String iface, NetworkCapabilities caps, boolean add) {

6988

// Marks are only available on WiFi interfaces. Checking for

6989

// marks on unsupported interfaces is harmless.

6990

if (!caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {

return;

}

int mark = mResources.get().getInteger(R.integer.config_networkWakeupPacketMark);

6995

int mask = mResources.get().getInteger(R.integer.config_networkWakeupPacketMask);

6996

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6997

// Mask/mark of zero will not detect anything interesting.

6998

// Don't install rules unless both values are nonzero.

6999

if (mark == 0 || mask == 0) {

return;

}

final String prefix = "iface:" + iface;

7004

try {

7005

if (add) {

7006

mNetd.wakeupAddInterface(iface, prefix, mark, mask);

7007

} else {

7008

mNetd.wakeupDelInterface(iface, prefix, mark, mask);

7009

}

7010

} catch (Exception e) {

7011

loge("Exception modifying wakeup packet monitoring: " + e);

}

}

private void updateInterfaces(final @Nullable LinkProperties newLp,

7017

final @Nullable LinkProperties oldLp, final int netId,

7018

final @NonNull NetworkCapabilities caps) {

7019

final CompareResult<String> interfaceDiff = new CompareResult<>(

7020

oldLp != null ? oldLp.getAllInterfaceNames() : null,

7021

newLp != null ? newLp.getAllInterfaceNames() : null);

7022

if (!interfaceDiff.added.isEmpty()) {

7023

for (final String iface : interfaceDiff.added) {

7024

try {

7025

if (DBG) log("Adding iface " + iface + " to network " + netId);

7026

mNetd.networkAddInterface(netId, iface);

7027

wakeupModifyInterface(iface, caps, true);

7028

mDeps.reportNetworkInterfaceForTransports(mContext, iface,

7029

caps.getTransportTypes());

7030

} catch (Exception e) {

7031

logw("Exception adding interface: " + e);

}

}

}

for (final String iface : interfaceDiff.removed) {

7036

try {

7037

if (DBG) log("Removing iface " + iface + " from network " + netId);

7038

wakeupModifyInterface(iface, caps, false);

7039

mNetd.networkRemoveInterface(netId, iface);

7040

} catch (Exception e) {

7041

loge("Exception removing interface: " + e);

}

}

}

// TODO: move to frameworks/libs/net.

7047

private RouteInfoParcel convertRouteInfo(RouteInfo route) {

7048

final String nextHop;

7049

7050

switch (route.getType()) {

7051

case RouteInfo.RTN_UNICAST:

7052

if (route.hasGateway()) {

7053

nextHop = route.getGateway().getHostAddress();

7054

} else {

7055

nextHop = INetd.NEXTHOP_NONE;

7056

}

7057

break;

7058

case RouteInfo.RTN_UNREACHABLE:

7059

nextHop = INetd.NEXTHOP_UNREACHABLE;

7060

break;

7061

case RouteInfo.RTN_THROW:

7062

nextHop = INetd.NEXTHOP_THROW;

7063

break;

7064

default:

7065

nextHop = INetd.NEXTHOP_NONE;

break;

}

final RouteInfoParcel rip = new RouteInfoParcel();

7070

rip.ifName = route.getInterface();

7071

rip.destination = route.getDestination().toString();

7072

rip.nextHop = nextHop;

7073

rip.mtu = route.getMtu();

return rip;

}

/**

* Have netd update routes from oldLp to newLp.

7080

* @return true if routes changed between oldLp and newLp

7081

*/

7082

private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) {

7083

// compare the route diff to determine which routes have been updated

7084

final CompareOrUpdateResult<RouteInfo.RouteKey, RouteInfo> routeDiff =

7085

new CompareOrUpdateResult<>(

7086

oldLp != null ? oldLp.getAllRoutes() : null,

7087

newLp != null ? newLp.getAllRoutes() : null,

7088

(r) -> r.getRouteKey());

7089

7090

// add routes before removing old in case it helps with continuous connectivity

7091

7092

// do this twice, adding non-next-hop routes first, then routes they are dependent on

7093

for (RouteInfo route : routeDiff.added) {

7094

if (route.hasGateway()) continue;

7095

if (VDBG || DDBG) log("Adding Route [" + route + "] to network " + netId);

7096

try {

7097

mNetd.networkAddRouteParcel(netId, convertRouteInfo(route));

7098

} catch (Exception e) {

7099

if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) {

7100

loge("Exception in networkAddRouteParcel for non-gateway: " + e);

}

}

}

for (RouteInfo route : routeDiff.added) {

7105

if (!route.hasGateway()) continue;

7106

if (VDBG || DDBG) log("Adding Route [" + route + "] to network " + netId);

7107

try {

7108

mNetd.networkAddRouteParcel(netId, convertRouteInfo(route));

7109

} catch (Exception e) {

7110

if ((route.getGateway() instanceof Inet4Address) || VDBG) {

7111

loge("Exception in networkAddRouteParcel for gateway: " + e);

}

}

}

for (RouteInfo route : routeDiff.removed) {

7117

if (VDBG || DDBG) log("Removing Route [" + route + "] from network " + netId);

7118

try {

7119

mNetd.networkRemoveRouteParcel(netId, convertRouteInfo(route));

7120

} catch (Exception e) {

7121

loge("Exception in networkRemoveRouteParcel: " + e);

}

}

for (RouteInfo route : routeDiff.updated) {

7126

if (VDBG || DDBG) log("Updating Route [" + route + "] from network " + netId);

7127

try {

7128

mNetd.networkUpdateRouteParcel(netId, convertRouteInfo(route));

7129

} catch (Exception e) {

7130

loge("Exception in networkUpdateRouteParcel: " + e);

7131

}

7132

}

7133

return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty()

7134

|| !routeDiff.updated.isEmpty();

7135

}

7136

7137

private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) {

7138

if (oldLp != null && newLp.isIdenticalDnses(oldLp)) {

7139

return; // no updating necessary

}

if (DBG) {

final Collection<InetAddress> dnses = newLp.getDnsServers();

7144

log("Setting DNS servers for network " + netId + " to " + dnses);

7145

}

7146

try {

7147

mDnsManager.noteDnsServersForNetwork(netId, newLp);

7148

mDnsManager.flushVmDnsCache();

7149

} catch (Exception e) {

7150

loge("Exception in setDnsConfigurationForNetwork: " + e);

}

}

private void updateVpnFiltering(LinkProperties newLp, LinkProperties oldLp,

7155

NetworkAgentInfo nai) {

7156

final String oldIface = oldLp != null ? oldLp.getInterfaceName() : null;

7157

final String newIface = newLp != null ? newLp.getInterfaceName() : null;

7158

final boolean wasFiltering = requiresVpnIsolation(nai, nai.networkCapabilities, oldLp);

7159

final boolean needsFiltering = requiresVpnIsolation(nai, nai.networkCapabilities, newLp);

7160

7161

if (!wasFiltering && !needsFiltering) {

// Nothing to do.

return;

}

if (Objects.equals(oldIface, newIface) && (wasFiltering == needsFiltering)) {

// Nothing changed.

return;

}

final Set<UidRange> ranges = nai.networkCapabilities.getUidRanges();

7172

final int vpnAppUid = nai.networkCapabilities.getOwnerUid();

7173

// TODO: this create a window of opportunity for apps to receive traffic between the time

7174

// when the old rules are removed and the time when new rules are added. To fix this,

7175

// make eBPF support two allowlisted interfaces so here new rules can be added before the

7176

// old rules are being removed.

7177

if (wasFiltering) {

7178

mPermissionMonitor.onVpnUidRangesRemoved(oldIface, ranges, vpnAppUid);

7179

}

7180

if (needsFiltering) {

7181

mPermissionMonitor.onVpnUidRangesAdded(newIface, ranges, vpnAppUid);

}

}

private void updateWakeOnLan(@NonNull LinkProperties lp) {

7186

if (mWolSupportedInterfaces == null) {

7187

mWolSupportedInterfaces = new ArraySet<>(mResources.get().getStringArray(

7188

R.array.config_wakeonlan_supported_interfaces));

7189

}

7190

lp.setWakeOnLanSupported(mWolSupportedInterfaces.contains(lp.getInterfaceName()));

7191

}

7192

7193

private int getNetworkPermission(NetworkCapabilities nc) {

7194

if (!nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) {

7195

return INetd.PERMISSION_SYSTEM;

7196

}

7197

if (!nc.hasCapability(NET_CAPABILITY_FOREGROUND)) {

7198

return INetd.PERMISSION_NETWORK;

7199

}

7200

return INetd.PERMISSION_NONE;

7201

}

7202

7203

private void updateNetworkPermissions(@NonNull final NetworkAgentInfo nai,

7204

@NonNull final NetworkCapabilities newNc) {

7205

final int oldPermission = getNetworkPermission(nai.networkCapabilities);

7206

final int newPermission = getNetworkPermission(newNc);

7207

if (oldPermission != newPermission && nai.created && !nai.isVPN()) {

7208

try {

7209

mNetd.networkSetPermissionForNetwork(nai.network.getNetId(), newPermission);

7210

} catch (RemoteException | ServiceSpecificException e) {

7211

loge("Exception in networkSetPermissionForNetwork: " + e);

}

}

}

/**

* Called when receiving NetworkCapabilities directly from a NetworkAgent.

7218

* Stores into |nai| any data coming from the agent that might also be written to the network's

7219

* NetworkCapabilities by ConnectivityService itself. This ensures that the data provided by the

7220

* agent is not lost when updateCapabilities is called.

7221

* This method should never alter the agent's NetworkCapabilities, only store data in |nai|.

7222

*/

7223

private void processCapabilitiesFromAgent(NetworkAgentInfo nai, NetworkCapabilities nc) {

7224

// Note: resetting the owner UID before storing the agent capabilities in NAI means that if

7225

// the agent attempts to change the owner UID, then nai.declaredCapabilities will not

7226

// actually be the same as the capabilities sent by the agent. Still, it is safer to reset

7227

// the owner UID here and behave as if the agent had never tried to change it.

7228

if (nai.networkCapabilities.getOwnerUid() != nc.getOwnerUid()) {

7229

Log.e(TAG, nai.toShortString() + ": ignoring attempt to change owner from "

7230

+ nai.networkCapabilities.getOwnerUid() + " to " + nc.getOwnerUid());

7231

nc.setOwnerUid(nai.networkCapabilities.getOwnerUid());

7232

}

7233

nai.declaredCapabilities = new NetworkCapabilities(nc);

7234

}

7235

7236

/** Modifies |newNc| based on the capabilities of |underlyingNetworks| and |agentCaps|. */

7237

@VisibleForTesting

7238

void applyUnderlyingCapabilities(@Nullable Network[] underlyingNetworks,

7239

@NonNull NetworkCapabilities agentCaps, @NonNull NetworkCapabilities newNc) {

7240

underlyingNetworks = underlyingNetworksOrDefault(

7241

agentCaps.getOwnerUid(), underlyingNetworks);

7242

long transportTypes = NetworkCapabilitiesUtils.packBits(agentCaps.getTransportTypes());

7243

int downKbps = NetworkCapabilities.LINK_BANDWIDTH_UNSPECIFIED;

7244

int upKbps = NetworkCapabilities.LINK_BANDWIDTH_UNSPECIFIED;

7245

// metered if any underlying is metered, or originally declared metered by the agent.

7246

boolean metered = !agentCaps.hasCapability(NET_CAPABILITY_NOT_METERED);

7247

boolean roaming = false; // roaming if any underlying is roaming

7248

boolean congested = false; // congested if any underlying is congested

7249

boolean suspended = true; // suspended if all underlying are suspended

7250

7251

boolean hadUnderlyingNetworks = false;

7252

if (null != underlyingNetworks) {

7253

for (Network underlyingNetwork : underlyingNetworks) {

7254

final NetworkAgentInfo underlying =

7255

getNetworkAgentInfoForNetwork(underlyingNetwork);

7256

if (underlying == null) continue;

7257

7258

final NetworkCapabilities underlyingCaps = underlying.networkCapabilities;

7259

hadUnderlyingNetworks = true;

7260

for (int underlyingType : underlyingCaps.getTransportTypes()) {

7261

transportTypes |= 1L << underlyingType;

7262

}

7263

7264

// Merge capabilities of this underlying network. For bandwidth, assume the

7265

// worst case.

7266

downKbps = NetworkCapabilities.minBandwidth(downKbps,

7267

underlyingCaps.getLinkDownstreamBandwidthKbps());

7268

upKbps = NetworkCapabilities.minBandwidth(upKbps,

7269

underlyingCaps.getLinkUpstreamBandwidthKbps());

7270

// If this underlying network is metered, the VPN is metered (it may cost money

7271

// to send packets on this network).

7272

metered |= !underlyingCaps.hasCapability(NET_CAPABILITY_NOT_METERED);

7273

// If this underlying network is roaming, the VPN is roaming (the billing structure

7274

// is different than the usual, local one).

7275

roaming |= !underlyingCaps.hasCapability(NET_CAPABILITY_NOT_ROAMING);

7276

// If this underlying network is congested, the VPN is congested (the current

7277

// condition of the network affects the performance of this network).

7278

congested |= !underlyingCaps.hasCapability(NET_CAPABILITY_NOT_CONGESTED);

7279

// If this network is not suspended, the VPN is not suspended (the VPN

7280

// is able to transfer some data).

7281

suspended &= !underlyingCaps.hasCapability(NET_CAPABILITY_NOT_SUSPENDED);

7282

}

7283

}

7284

if (!hadUnderlyingNetworks) {

7285

// No idea what the underlying networks are; assume reasonable defaults

metered = true;

roaming = false;

congested = false;

suspended = false;

}

newNc.setTransportTypes(NetworkCapabilitiesUtils.unpackBits(transportTypes));

7293

newNc.setLinkDownstreamBandwidthKbps(downKbps);

7294

newNc.setLinkUpstreamBandwidthKbps(upKbps);

7295

newNc.setCapability(NET_CAPABILITY_NOT_METERED, !metered);

7296

newNc.setCapability(NET_CAPABILITY_NOT_ROAMING, !roaming);

7297

newNc.setCapability(NET_CAPABILITY_NOT_CONGESTED, !congested);

7298

newNc.setCapability(NET_CAPABILITY_NOT_SUSPENDED, !suspended);

}

/**

* Augments the NetworkCapabilities passed in by a NetworkAgent with capabilities that are

7303

* maintained here that the NetworkAgent is not aware of (e.g., validated, captive portal,

7304

* and foreground status).

7305

*/

7306

@NonNull

7307

private NetworkCapabilities mixInCapabilities(NetworkAgentInfo nai, NetworkCapabilities nc) {

7308

// Once a NetworkAgent is connected, complain if some immutable capabilities are removed.

7309

// Don't complain for VPNs since they're not driven by requests and there is no risk of

7310

// causing a connect/teardown loop.

7311

// TODO: remove this altogether and make it the responsibility of the NetworkProviders to

7312

// avoid connect/teardown loops.

7313

if (nai.everConnected &&

7314

!nai.isVPN() &&

7315

!nai.networkCapabilities.satisfiedByImmutableNetworkCapabilities(nc)) {

7316

// TODO: consider not complaining when a network agent degrades its capabilities if this

7317

// does not cause any request (that is not a listen) currently matching that agent to

7318

// stop being matched by the updated agent.

7319

String diff = nai.networkCapabilities.describeImmutableDifferences(nc);

7320

if (!TextUtils.isEmpty(diff)) {

7321

Log.wtf(TAG, "BUG: " + nai + " lost immutable capabilities:" + diff);

}

}

// Don't modify caller's NetworkCapabilities.

7326

final NetworkCapabilities newNc = new NetworkCapabilities(nc);

7327

if (nai.lastValidated) {

7328

newNc.addCapability(NET_CAPABILITY_VALIDATED);

7329

} else {

7330

newNc.removeCapability(NET_CAPABILITY_VALIDATED);

7331

}

7332

if (nai.lastCaptivePortalDetected) {

7333

newNc.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL);

7334

} else {

7335

newNc.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL);

7336

}

7337

if (nai.isBackgroundNetwork()) {

7338

newNc.removeCapability(NET_CAPABILITY_FOREGROUND);

7339

} else {

7340

newNc.addCapability(NET_CAPABILITY_FOREGROUND);

7341

}

7342

if (nai.partialConnectivity) {

7343

newNc.addCapability(NET_CAPABILITY_PARTIAL_CONNECTIVITY);

7344

} else {

7345

newNc.removeCapability(NET_CAPABILITY_PARTIAL_CONNECTIVITY);

7346

}

7347

newNc.setPrivateDnsBroken(nai.networkCapabilities.isPrivateDnsBroken());

7348

7349

// TODO : remove this once all factories are updated to send NOT_SUSPENDED and NOT_ROAMING

7350

if (!newNc.hasTransport(TRANSPORT_CELLULAR)) {

7351

newNc.addCapability(NET_CAPABILITY_NOT_SUSPENDED);

7352

newNc.addCapability(NET_CAPABILITY_NOT_ROAMING);

7353

}

7354

Lorenzo Colitti

2021-07-02 11:47:57 +0900

[diff] [blame]

7355

if (nai.propagateUnderlyingCapabilities()) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7356

applyUnderlyingCapabilities(nai.declaredUnderlyingNetworks, nai.declaredCapabilities,

newNc);

}

return newNc;

}

private void updateNetworkInfoForRoamingAndSuspended(NetworkAgentInfo nai,

7364

NetworkCapabilities prevNc, NetworkCapabilities newNc) {

7365

final boolean prevSuspended = !prevNc.hasCapability(NET_CAPABILITY_NOT_SUSPENDED);

7366

final boolean suspended = !newNc.hasCapability(NET_CAPABILITY_NOT_SUSPENDED);

7367

final boolean prevRoaming = !prevNc.hasCapability(NET_CAPABILITY_NOT_ROAMING);

7368

final boolean roaming = !newNc.hasCapability(NET_CAPABILITY_NOT_ROAMING);

7369

if (prevSuspended != suspended) {

7370

// TODO (b/73132094) : remove this call once the few users of onSuspended and

7371

// onResumed have been removed.

7372

notifyNetworkCallbacks(nai, suspended ? ConnectivityManager.CALLBACK_SUSPENDED

7373

: ConnectivityManager.CALLBACK_RESUMED);

7374

}

7375

if (prevSuspended != suspended || prevRoaming != roaming) {

7376

// updateNetworkInfo will mix in the suspended info from the capabilities and

7377

// take appropriate action for the network having possibly changed state.

7378

updateNetworkInfo(nai, nai.networkInfo);

}

}

/**

* Update the NetworkCapabilities for {@code nai} to {@code nc}. Specifically:

7384

*

7385

* 1. Calls mixInCapabilities to merge the passed-in NetworkCapabilities {@code nc} with the

7386

* capabilities we manage and store in {@code nai}, such as validated status and captive

7387

* portal status)

7388

* 2. Takes action on the result: changes network permissions, sends CAP_CHANGED callbacks, and

7389

* potentially triggers rematches.

7390

* 3. Directly informs other network stack components (NetworkStatsService, VPNs, etc. of the

7391

* change.)

7392

*

7393

* @param oldScore score of the network before any of the changes that prompted us

7394

* to call this function.

7395

* @param nai the network having its capabilities updated.

7396

* @param nc the new network capabilities.

7397

*/

7398

private void updateCapabilities(final int oldScore, @NonNull final NetworkAgentInfo nai,

7399

@NonNull final NetworkCapabilities nc) {

7400

NetworkCapabilities newNc = mixInCapabilities(nai, nc);

7401

if (Objects.equals(nai.networkCapabilities, newNc)) return;

7402

updateNetworkPermissions(nai, newNc);

7403

final NetworkCapabilities prevNc = nai.getAndSetNetworkCapabilities(newNc);

7404

7405

updateUids(nai, prevNc, newNc);

7406

nai.updateScoreForNetworkAgentUpdate();

7407

7408

if (nai.getCurrentScore() == oldScore && newNc.equalRequestableCapabilities(prevNc)) {

7409

// If the requestable capabilities haven't changed, and the score hasn't changed, then

7410

// the change we're processing can't affect any requests, it can only affect the listens

7411

// on this network. We might have been called by rematchNetworkAndRequests when a

7412

// network changed foreground state.

7413

processListenRequests(nai);

7414

} else {

7415

// If the requestable capabilities have changed or the score changed, we can't have been

7416

// called by rematchNetworkAndRequests, so it's safe to start a rematch.

7417

rematchAllNetworksAndRequests();

7418

notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED);

7419

}

7420

updateNetworkInfoForRoamingAndSuspended(nai, prevNc, newNc);

7421

7422

final boolean oldMetered = prevNc.isMetered();

7423

final boolean newMetered = newNc.isMetered();

7424

final boolean meteredChanged = oldMetered != newMetered;

7425

7426

if (meteredChanged) {

7427

maybeNotifyNetworkBlocked(nai, oldMetered, newMetered,

7428

mVpnBlockedUidRanges, mVpnBlockedUidRanges);

7429

}

7430

7431

final boolean roamingChanged = prevNc.hasCapability(NET_CAPABILITY_NOT_ROAMING)

7432

!= newNc.hasCapability(NET_CAPABILITY_NOT_ROAMING);

7433

7434

// Report changes that are interesting for network statistics tracking.

7435

if (meteredChanged || roamingChanged) {

7436

notifyIfacesChangedForNetworkStats();

7437

}

7438

7439

// This network might have been underlying another network. Propagate its capabilities.

7440

propagateUnderlyingNetworkCapabilities(nai.network);

7441

7442

if (!newNc.equalsTransportTypes(prevNc)) {

7443

mDnsManager.updateTransportsForNetwork(

7444

nai.network.getNetId(), newNc.getTransportTypes());

7445

}

lucaslin

53e8a26

2021-06-08 01:43:59 +0800

[diff] [blame]

7446

7447

maybeSendProxyBroadcast(nai, prevNc, newNc);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7448

}

7449

7450

/** Convenience method to update the capabilities for a given network. */

7451

private void updateCapabilitiesForNetwork(NetworkAgentInfo nai) {

7452

updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities);

}

/**

* Returns whether VPN isolation (ingress interface filtering) should be applied on the given

7457

* network.

7458

*

7459

* Ingress interface filtering enforces that all apps under the given network can only receive

7460

* packets from the network's interface (and loopback). This is important for VPNs because

7461

* apps that cannot bypass a fully-routed VPN shouldn't be able to receive packets from any

7462

* non-VPN interfaces.

7463

*

7464

* As a result, this method should return true iff

7465

* 1. the network is an app VPN (not legacy VPN)

7466

* 2. the VPN does not allow bypass

7467

* 3. the VPN is fully-routed

7468

* 4. the VPN interface is non-null

7469

*

7470

* @see INetd#firewallAddUidInterfaceRules

7471

* @see INetd#firewallRemoveUidInterfaceRules

7472

*/

7473

private boolean requiresVpnIsolation(@NonNull NetworkAgentInfo nai, NetworkCapabilities nc,

7474

LinkProperties lp) {

7475

if (nc == null || lp == null) return false;

7476

return nai.isVPN()

7477

&& !nai.networkAgentConfig.allowBypass

7478

&& nc.getOwnerUid() != Process.SYSTEM_UID

7479

&& lp.getInterfaceName() != null

7480

&& (lp.hasIpv4DefaultRoute() || lp.hasIpv4UnreachableDefaultRoute())

7481

&& (lp.hasIpv6DefaultRoute() || lp.hasIpv6UnreachableDefaultRoute());

7482

}

7483

7484

private static UidRangeParcel[] toUidRangeStableParcels(final @NonNull Set<UidRange> ranges) {

7485

final UidRangeParcel[] stableRanges = new UidRangeParcel[ranges.size()];

7486

int index = 0;

7487

for (UidRange range : ranges) {

7488

stableRanges[index] = new UidRangeParcel(range.start, range.stop);

index++;

}

return stableRanges;

}

private static UidRangeParcel[] toUidRangeStableParcels(UidRange[] ranges) {

7495

final UidRangeParcel[] stableRanges = new UidRangeParcel[ranges.length];

7496

for (int i = 0; i < ranges.length; i++) {

7497

stableRanges[i] = new UidRangeParcel(ranges[i].start, ranges[i].stop);

}

return stableRanges;

}

private void maybeCloseSockets(NetworkAgentInfo nai, UidRangeParcel[] ranges,

7503

int[] exemptUids) {

7504

if (nai.isVPN() && !nai.networkAgentConfig.allowBypass) {

7505

try {

7506

mNetd.socketDestroy(ranges, exemptUids);

7507

} catch (Exception e) {

7508

loge("Exception in socket destroy: ", e);

}

}

}

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

7513

private void updateVpnUidRanges(boolean add, NetworkAgentInfo nai, Set<UidRange> uidRanges) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7514

int[] exemptUids = new int[2];

7515

// TODO: Excluding VPN_UID is necessary in order to not to kill the TCP connection used

7516

// by PPTP. Fix this by making Vpn set the owner UID to VPN_UID instead of system when

7517

// starting a legacy VPN, and remove VPN_UID here. (b/176542831)

7518

exemptUids[0] = VPN_UID;

7519

exemptUids[1] = nai.networkCapabilities.getOwnerUid();

7520

UidRangeParcel[] ranges = toUidRangeStableParcels(uidRanges);

7521

7522

maybeCloseSockets(nai, ranges, exemptUids);

7523

try {

7524

if (add) {

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7525

mNetd.networkAddUidRangesParcel(new NativeUidRangeConfig(

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

7526

nai.network.netId, ranges, PREFERENCE_ORDER_VPN));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7527

} else {

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7528

mNetd.networkRemoveUidRangesParcel(new NativeUidRangeConfig(

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

7529

nai.network.netId, ranges, PREFERENCE_ORDER_VPN));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7530

}

7531

} catch (Exception e) {

7532

loge("Exception while " + (add ? "adding" : "removing") + " uid ranges " + uidRanges +

7533

" on netId " + nai.network.netId + ". " + e);

7534

}

7535

maybeCloseSockets(nai, ranges, exemptUids);

7536

}

7537

lucaslin

53e8a26

2021-06-08 01:43:59 +0800

[diff] [blame]

7538

private boolean isProxySetOnAnyDefaultNetwork() {

7539

ensureRunningOnConnectivityServiceThread();

7540

for (final NetworkRequestInfo nri : mDefaultNetworkRequests) {

7541

final NetworkAgentInfo nai = nri.getSatisfier();

7542

if (nai != null && nai.linkProperties.getHttpProxy() != null) {

return true;

}

}

return false;

}

private void maybeSendProxyBroadcast(NetworkAgentInfo nai, NetworkCapabilities prevNc,

7550

NetworkCapabilities newNc) {

7551

// When the apps moved from/to a VPN, a proxy broadcast is needed to inform the apps that

7552

// the proxy might be changed since the default network satisfied by the apps might also

7553

// changed.

7554

// TODO: Try to track the default network that apps use and only send a proxy broadcast when

7555

// that happens to prevent false alarms.

7556

if (nai.isVPN() && nai.everConnected && !NetworkCapabilities.hasSameUids(prevNc, newNc)

7557

&& (nai.linkProperties.getHttpProxy() != null || isProxySetOnAnyDefaultNetwork())) {

7558

mProxyTracker.sendProxyBroadcast();

}

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7562

private void updateUids(NetworkAgentInfo nai, NetworkCapabilities prevNc,

7563

NetworkCapabilities newNc) {

7564

Set<UidRange> prevRanges = null == prevNc ? null : prevNc.getUidRanges();

7565

Set<UidRange> newRanges = null == newNc ? null : newNc.getUidRanges();

7566

if (null == prevRanges) prevRanges = new ArraySet<>();

7567

if (null == newRanges) newRanges = new ArraySet<>();

7568

final Set<UidRange> prevRangesCopy = new ArraySet<>(prevRanges);

7569

7570

prevRanges.removeAll(newRanges);

7571

newRanges.removeAll(prevRangesCopy);

7572

7573

try {

7574

// When updating the VPN uid routing rules, add the new range first then remove the old

7575

// range. If old range were removed first, there would be a window between the old

7576

// range being removed and the new range being added, during which UIDs contained

7577

// in both ranges are not subject to any VPN routing rules. Adding new range before

7578

// removing old range works because, unlike the filtering rules below, it's possible to

7579

// add duplicate UID routing rules.

7580

// TODO: calculate the intersection of add & remove. Imagining that we are trying to

7581

// remove uid 3 from a set containing 1-5. Intersection of the prev and new sets is:

7582

// [1-5] & [1-2],[4-5] == [3]

7583

// Then we can do:

7584

// maybeCloseSockets([3])

7585

// mNetd.networkAddUidRanges([1-2],[4-5])

7586

// mNetd.networkRemoveUidRanges([1-5])

7587

// maybeCloseSockets([3])

7588

// This can prevent the sockets of uid 1-2, 4-5 from being closed. It also reduce the

7589

// number of binder calls from 6 to 4.

7590

if (!newRanges.isEmpty()) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

7591

updateVpnUidRanges(true, nai, newRanges);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7592

}

7593

if (!prevRanges.isEmpty()) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

7594

updateVpnUidRanges(false, nai, prevRanges);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7595

}

7596

final boolean wasFiltering = requiresVpnIsolation(nai, prevNc, nai.linkProperties);

7597

final boolean shouldFilter = requiresVpnIsolation(nai, newNc, nai.linkProperties);

7598

final String iface = nai.linkProperties.getInterfaceName();

7599

// For VPN uid interface filtering, old ranges need to be removed before new ranges can

7600

// be added, due to the range being expanded and stored as individual UIDs. For example

7601

// the UIDs might be updated from [0, 99999] to ([0, 10012], [10014, 99999]) which means

7602

// prevRanges = [0, 99999] while newRanges = [0, 10012], [10014, 99999]. If prevRanges

7603

// were added first and then newRanges got removed later, there would be only one uid

7604

// 10013 left. A consequence of removing old ranges before adding new ranges is that

7605

// there is now a window of opportunity when the UIDs are not subject to any filtering.

7606

// Note that this is in contrast with the (more robust) update of VPN routing rules

7607

// above, where the addition of new ranges happens before the removal of old ranges.

7608

// TODO Fix this window by computing an accurate diff on Set<UidRange>, so the old range

7609

// to be removed will never overlap with the new range to be added.

7610

if (wasFiltering && !prevRanges.isEmpty()) {

7611

mPermissionMonitor.onVpnUidRangesRemoved(iface, prevRanges, prevNc.getOwnerUid());

7612

}

7613

if (shouldFilter && !newRanges.isEmpty()) {

7614

mPermissionMonitor.onVpnUidRangesAdded(iface, newRanges, newNc.getOwnerUid());

7615

}

7616

} catch (Exception e) {

7617

// Never crash!

7618

loge("Exception in updateUids: ", e);

}

}

public void handleUpdateLinkProperties(NetworkAgentInfo nai, LinkProperties newLp) {

7623

ensureRunningOnConnectivityServiceThread();

7624

Lorenzo Colitti

b4bf015

2021-06-07 15:32:04 +0900

[diff] [blame]

7625

if (!mNetworkAgentInfos.contains(nai)) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7626

// Ignore updates for disconnected networks

return;

}

if (VDBG || DDBG) {

log("Update of LinkProperties for " + nai.toShortString()

7631

+ "; created=" + nai.created

7632

+ "; everConnected=" + nai.everConnected);

7633

}

7634

// TODO: eliminate this defensive copy after confirming that updateLinkProperties does not

7635

// modify its oldLp parameter.

7636

updateLinkProperties(nai, newLp, new LinkProperties(nai.linkProperties));

7637

}

7638

7639

private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent,

7640

int notificationType) {

7641

if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) {

7642

Intent intent = new Intent();

7643

intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network);

7644

// If apps could file multi-layer requests with PendingIntents, they'd need to know

7645

// which of the layer is satisfied alongside with some ID for the request. Hence, if

7646

// such an API is ever implemented, there is no doubt the right request to send in

Remi NGUYEN VAN

1e238a8

2021-06-25 16:38:05 +0900

[diff] [blame]

7647

// EXTRA_NETWORK_REQUEST is the active request, and whatever ID would be added would

7648

// need to be sent as a separate extra.

7649

final NetworkRequest req = nri.isMultilayerRequest()

7650

? nri.getActiveRequest()

7651

// Non-multilayer listen requests do not have an active request

7652

: nri.mRequests.get(0);

7653

if (req == null) {

7654

Log.wtf(TAG, "No request in NRI " + nri);

7655

}

7656

intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, req);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7657

nri.mPendingIntentSent = true;

7658

sendIntent(nri.mPendingIntent, intent);

}

// else not handled

}

private void sendIntent(PendingIntent pendingIntent, Intent intent) {

7664

mPendingIntentWakeLock.acquire();

7665

try {

7666

if (DBG) log("Sending " + pendingIntent);

7667

pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */);

7668

} catch (PendingIntent.CanceledException e) {

7669

if (DBG) log(pendingIntent + " was not sent, it had been canceled.");

7670

mPendingIntentWakeLock.release();

7671

releasePendingNetworkRequest(pendingIntent);

7672

}

7673

// ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished()

}

@Override

public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode,

7678

String resultData, Bundle resultExtras) {

7679

if (DBG) log("Finished sending " + pendingIntent);

7680

mPendingIntentWakeLock.release();

7681

// Release with a delay so the receiving client has an opportunity to put in its

7682

// own request.

7683

releasePendingNetworkRequestWithDelay(pendingIntent);

7684

}

7685

7686

private void callCallbackForRequest(@NonNull final NetworkRequestInfo nri,

7687

@NonNull final NetworkAgentInfo networkAgent, final int notificationType,

7688

final int arg1) {

7689

if (nri.mMessenger == null) {

7690

// Default request has no msgr. Also prevents callbacks from being invoked for

7691

// NetworkRequestInfos registered with ConnectivityDiagnostics requests. Those callbacks

7692

// are Type.LISTEN, but should not have NetworkCallbacks invoked.

7693

return;

7694

}

7695

Bundle bundle = new Bundle();

7696

// TODO b/177608132: make sure callbacks are indexed by NRIs and not NetworkRequest objects.

7697

// TODO: check if defensive copies of data is needed.

7698

final NetworkRequest nrForCallback = nri.getNetworkRequestForCallback();

7699

putParcelable(bundle, nrForCallback);

7700

Message msg = Message.obtain();

7701

if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL) {

7702

putParcelable(bundle, networkAgent.network);

7703

}

7704

final boolean includeLocationSensitiveInfo =

7705

(nri.mCallbackFlags & NetworkCallback.FLAG_INCLUDE_LOCATION_INFO) != 0;

7706

switch (notificationType) {

7707

case ConnectivityManager.CALLBACK_AVAILABLE: {

7708

final NetworkCapabilities nc =

7709

networkCapabilitiesRestrictedForCallerPermissions(

7710

networkAgent.networkCapabilities, nri.mPid, nri.mUid);

7711

putParcelable(

7712

bundle,

7713

createWithLocationInfoSanitizedIfNecessaryWhenParceled(

7714

nc, includeLocationSensitiveInfo, nri.mPid, nri.mUid,

7715

nrForCallback.getRequestorPackageName(),

7716

nri.mCallingAttributionTag));

7717

putParcelable(bundle, linkPropertiesRestrictedForCallerPermissions(

7718

networkAgent.linkProperties, nri.mPid, nri.mUid));

7719

// For this notification, arg1 contains the blocked status.

msg.arg1 = arg1;

break;

}

case ConnectivityManager.CALLBACK_LOSING: {

msg.arg1 = arg1;

break;

}

case ConnectivityManager.CALLBACK_CAP_CHANGED: {

7728

// networkAgent can't be null as it has been accessed a few lines above.

7729

final NetworkCapabilities netCap =

7730

networkCapabilitiesRestrictedForCallerPermissions(

7731

networkAgent.networkCapabilities, nri.mPid, nri.mUid);

7732

putParcelable(

7733

bundle,

7734

createWithLocationInfoSanitizedIfNecessaryWhenParceled(

7735

netCap, includeLocationSensitiveInfo, nri.mPid, nri.mUid,

7736

nrForCallback.getRequestorPackageName(),

7737

nri.mCallingAttributionTag));

7738

break;

7739

}

7740

case ConnectivityManager.CALLBACK_IP_CHANGED: {

7741

putParcelable(bundle, linkPropertiesRestrictedForCallerPermissions(

7742

networkAgent.linkProperties, nri.mPid, nri.mUid));

7743

break;

7744

}

7745

case ConnectivityManager.CALLBACK_BLK_CHANGED: {

7746

maybeLogBlockedStatusChanged(nri, networkAgent.network, arg1);

msg.arg1 = arg1;

break;

}

}

msg.what = notificationType;

msg.setData(bundle);

try {

if (VDBG) {

String notification = ConnectivityManager.getCallbackName(notificationType);

7756

log("sending notification " + notification + " for " + nrForCallback);

7757

}

7758

nri.mMessenger.send(msg);

7759

} catch (RemoteException e) {

7760

// may occur naturally in the race of binder death.

7761

loge("RemoteException caught trying to send a callback msg for " + nrForCallback);

}

}

private static <T extends Parcelable> void putParcelable(Bundle bundle, T t) {

7766

bundle.putParcelable(t.getClass().getSimpleName(), t);

7767

}

7768

7769

private void teardownUnneededNetwork(NetworkAgentInfo nai) {

7770

if (nai.numRequestNetworkRequests() != 0) {

7771

for (int i = 0; i < nai.numNetworkRequests(); i++) {

7772

NetworkRequest nr = nai.requestAt(i);

7773

// Ignore listening and track default requests.

7774

if (!nr.isRequest()) continue;

7775

loge("Dead network still had at least " + nr);

break;

}

}

nai.disconnect();

}

private void handleLingerComplete(NetworkAgentInfo oldNetwork) {

7783

if (oldNetwork == null) {

7784

loge("Unknown NetworkAgentInfo in handleLingerComplete");

7785

return;

7786

}

7787

if (DBG) log("handleLingerComplete for " + oldNetwork.toShortString());

7788

7789

// If we get here it means that the last linger timeout for this network expired. So there

7790

// must be no other active linger timers, and we must stop lingering.

7791

oldNetwork.clearInactivityState();

7792

7793

if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) {

7794

// Tear the network down.

7795

teardownUnneededNetwork(oldNetwork);

7796

} else {

7797

// Put the network in the background if it doesn't satisfy any foreground request.

7798

updateCapabilitiesForNetwork(oldNetwork);

}

}

private void processDefaultNetworkChanges(@NonNull final NetworkReassignment changes) {

7803

boolean isDefaultChanged = false;

7804

for (final NetworkRequestInfo defaultRequestInfo : mDefaultNetworkRequests) {

7805

final NetworkReassignment.RequestReassignment reassignment =

7806

changes.getReassignment(defaultRequestInfo);

7807

if (null == reassignment) {

7808

continue;

7809

}

7810

// reassignment only contains those instances where the satisfying network changed.

7811

isDefaultChanged = true;

7812

// Notify system services of the new default.

7813

makeDefault(defaultRequestInfo, reassignment.mOldNetwork, reassignment.mNewNetwork);

7814

}

7815

7816

if (isDefaultChanged) {

7817

// Hold a wakelock for a short time to help apps in migrating to a new default.

7818

scheduleReleaseNetworkTransitionWakelock();

}

}

private void makeDefault(@NonNull final NetworkRequestInfo nri,

7823

@Nullable final NetworkAgentInfo oldDefaultNetwork,

7824

@Nullable final NetworkAgentInfo newDefaultNetwork) {

7825

if (DBG) {

7826

log("Switching to new default network for: " + nri + " using " + newDefaultNetwork);

7827

}

7828

7829

// Fix up the NetworkCapabilities of any networks that have this network as underlying.

7830

if (newDefaultNetwork != null) {

7831

propagateUnderlyingNetworkCapabilities(newDefaultNetwork.network);

7832

}

7833

7834

// Set an app level managed default and return since further processing only applies to the

7835

// default network.

7836

if (mDefaultRequest != nri) {

7837

makeDefaultForApps(nri, oldDefaultNetwork, newDefaultNetwork);

return;

}

makeDefaultNetwork(newDefaultNetwork);

7842

7843

if (oldDefaultNetwork != null) {

7844

mLingerMonitor.noteLingerDefaultNetwork(oldDefaultNetwork, newDefaultNetwork);

7845

}

7846

mNetworkActivityTracker.updateDataActivityTracking(newDefaultNetwork, oldDefaultNetwork);

7847

handleApplyDefaultProxy(null != newDefaultNetwork

7848

? newDefaultNetwork.linkProperties.getHttpProxy() : null);

7849

updateTcpBufferSizes(null != newDefaultNetwork

7850

? newDefaultNetwork.linkProperties.getTcpBufferSizes() : null);

7851

notifyIfacesChangedForNetworkStats();

7852

}

7853

7854

private void makeDefaultForApps(@NonNull final NetworkRequestInfo nri,

7855

@Nullable final NetworkAgentInfo oldDefaultNetwork,

7856

@Nullable final NetworkAgentInfo newDefaultNetwork) {

7857

try {

7858

if (VDBG) {

7859

log("Setting default network for " + nri

7860

+ " using UIDs " + nri.getUids()

7861

+ " with old network " + (oldDefaultNetwork != null

7862

? oldDefaultNetwork.network().getNetId() : "null")

7863

+ " and new network " + (newDefaultNetwork != null

7864

? newDefaultNetwork.network().getNetId() : "null"));

7865

}

7866

if (nri.getUids().isEmpty()) {

7867

throw new IllegalStateException("makeDefaultForApps called without specifying"

7868

+ " any applications to set as the default." + nri);

7869

}

7870

if (null != newDefaultNetwork) {

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7871

mNetd.networkAddUidRangesParcel(new NativeUidRangeConfig(

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7872

newDefaultNetwork.network.getNetId(),

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7873

toUidRangeStableParcels(nri.getUids()),

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

7874

nri.getPreferenceOrderForNetd()));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7875

}

7876

if (null != oldDefaultNetwork) {

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7877

mNetd.networkRemoveUidRangesParcel(new NativeUidRangeConfig(

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7878

oldDefaultNetwork.network.getNetId(),

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7879

toUidRangeStableParcels(nri.getUids()),

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

7880

nri.getPreferenceOrderForNetd()));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7881

}

7882

} catch (RemoteException | ServiceSpecificException e) {

7883

loge("Exception setting app default network", e);

}

}

private void makeDefaultNetwork(@Nullable final NetworkAgentInfo newDefaultNetwork) {

7888

try {

7889

if (null != newDefaultNetwork) {

7890

mNetd.networkSetDefault(newDefaultNetwork.network.getNetId());

7891

} else {

7892

mNetd.networkClearDefault();

7893

}

7894

} catch (RemoteException | ServiceSpecificException e) {

7895

loge("Exception setting default network :" + e);

}

}

private void processListenRequests(@NonNull final NetworkAgentInfo nai) {

7900

// For consistency with previous behaviour, send onLost callbacks before onAvailable.

7901

processNewlyLostListenRequests(nai);

7902

notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED);

7903

processNewlySatisfiedListenRequests(nai);

7904

}

7905

7906

private void processNewlyLostListenRequests(@NonNull final NetworkAgentInfo nai) {

7907

for (final NetworkRequestInfo nri : mNetworkRequests.values()) {

7908

if (nri.isMultilayerRequest()) {

7909

continue;

7910

}

7911

final NetworkRequest nr = nri.mRequests.get(0);

7912

if (!nr.isListen()) continue;

7913

if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) {

7914

nai.removeRequest(nr.requestId);

7915

callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0);

}

}

}

private void processNewlySatisfiedListenRequests(@NonNull final NetworkAgentInfo nai) {

7921

for (final NetworkRequestInfo nri : mNetworkRequests.values()) {

7922

if (nri.isMultilayerRequest()) {

7923

continue;

7924

}

7925

final NetworkRequest nr = nri.mRequests.get(0);

7926

if (!nr.isListen()) continue;

7927

if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) {

7928

nai.addRequest(nr);

7929

notifyNetworkAvailable(nai, nri);

}

}

}

// An accumulator class to gather the list of changes that result from a rematch.

7935

private static class NetworkReassignment {

7936

static class RequestReassignment {

7937

@NonNull public final NetworkRequestInfo mNetworkRequestInfo;

7938

@Nullable public final NetworkRequest mOldNetworkRequest;

7939

@Nullable public final NetworkRequest mNewNetworkRequest;

7940

@Nullable public final NetworkAgentInfo mOldNetwork;

7941

@Nullable public final NetworkAgentInfo mNewNetwork;

7942

RequestReassignment(@NonNull final NetworkRequestInfo networkRequestInfo,

7943

@Nullable final NetworkRequest oldNetworkRequest,

7944

@Nullable final NetworkRequest newNetworkRequest,

7945

@Nullable final NetworkAgentInfo oldNetwork,

7946

@Nullable final NetworkAgentInfo newNetwork) {

7947

mNetworkRequestInfo = networkRequestInfo;

7948

mOldNetworkRequest = oldNetworkRequest;

7949

mNewNetworkRequest = newNetworkRequest;

7950

mOldNetwork = oldNetwork;

7951

mNewNetwork = newNetwork;

7952

}

7953

7954

public String toString() {

7955

final NetworkRequest requestToShow = null != mNewNetworkRequest

7956

? mNewNetworkRequest : mNetworkRequestInfo.mRequests.get(0);

7957

return requestToShow.requestId + " : "

7958

+ (null != mOldNetwork ? mOldNetwork.network.getNetId() : "null")

7959

+ " → " + (null != mNewNetwork ? mNewNetwork.network.getNetId() : "null");

}

}

@NonNull private final ArrayList<RequestReassignment> mReassignments = new ArrayList<>();

7964

7965

@NonNull Iterable<RequestReassignment> getRequestReassignments() {

7966

return mReassignments;

7967

}

7968

7969

void addRequestReassignment(@NonNull final RequestReassignment reassignment) {

7970

if (Build.isDebuggable()) {

7971

// The code is never supposed to add two reassignments of the same request. Make

7972

// sure this stays true, but without imposing this expensive check on all

7973

// reassignments on all user devices.

7974

for (final RequestReassignment existing : mReassignments) {

7975

if (existing.mNetworkRequestInfo.equals(reassignment.mNetworkRequestInfo)) {

7976

throw new IllegalStateException("Trying to reassign ["

7977

+ reassignment + "] but already have ["

+ existing + "]");

}

}

}

mReassignments.add(reassignment);

7983

}

7984

7985

// Will return null if this reassignment does not change the network assigned to

7986

// the passed request.

7987

@Nullable

7988

private RequestReassignment getReassignment(@NonNull final NetworkRequestInfo nri) {

7989

for (final RequestReassignment event : getRequestReassignments()) {

7990

if (nri == event.mNetworkRequestInfo) return event;

}

return null;

}

public String toString() {

7996

final StringJoiner sj = new StringJoiner(", " /* delimiter */,

7997

"NetReassign [" /* prefix */, "]" /* suffix */);

7998

if (mReassignments.isEmpty()) return sj.add("no changes").toString();

7999

for (final RequestReassignment rr : getRequestReassignments()) {

8000

sj.add(rr.toString());

8001

}

8002

return sj.toString();

8003

}

8004

8005

public String debugString() {

8006

final StringBuilder sb = new StringBuilder();

8007

sb.append("NetworkReassignment :");

8008

if (mReassignments.isEmpty()) return sb.append(" no changes").toString();

8009

for (final RequestReassignment rr : getRequestReassignments()) {

8010

sb.append("\n ").append(rr);

8011

}

8012

return sb.append("\n").toString();

}

}

private void updateSatisfiersForRematchRequest(@NonNull final NetworkRequestInfo nri,

8017

@Nullable final NetworkRequest previousRequest,

8018

@Nullable final NetworkRequest newRequest,

8019

@Nullable final NetworkAgentInfo previousSatisfier,

8020

@Nullable final NetworkAgentInfo newSatisfier,

8021

final long now) {

8022

if (null != newSatisfier && mNoServiceNetwork != newSatisfier) {

8023

if (VDBG) log("rematch for " + newSatisfier.toShortString());

8024

if (null != previousRequest && null != previousSatisfier) {

8025

if (VDBG || DDBG) {

8026

log(" accepting network in place of " + previousSatisfier.toShortString());

8027

}

8028

previousSatisfier.removeRequest(previousRequest.requestId);

8029

previousSatisfier.lingerRequest(previousRequest.requestId, now);

8030

} else {

8031

if (VDBG || DDBG) log(" accepting network in place of null");

8032

}

8033

8034

// To prevent constantly CPU wake up for nascent timer, if a network comes up

8035

// and immediately satisfies a request then remove the timer. This will happen for

8036

// all networks except in the case of an underlying network for a VCN.

8037

if (newSatisfier.isNascent()) {

8038

newSatisfier.unlingerRequest(NetworkRequest.REQUEST_ID_NONE);

8039

newSatisfier.unsetInactive();

8040

}

8041

8042

// if newSatisfier is not null, then newRequest may not be null.

8043

newSatisfier.unlingerRequest(newRequest.requestId);

8044

if (!newSatisfier.addRequest(newRequest)) {

8045

Log.wtf(TAG, "BUG: " + newSatisfier.toShortString() + " already has "

8046

+ newRequest);

8047

}

8048

} else if (null != previousRequest && null != previousSatisfier) {

8049

if (DBG) {

8050

log("Network " + previousSatisfier.toShortString() + " stopped satisfying"

8051

+ " request " + previousRequest.requestId);

8052

}

8053

previousSatisfier.removeRequest(previousRequest.requestId);

8054

}

8055

nri.setSatisfier(newSatisfier, newRequest);

}

/**

* This function is triggered when something can affect what network should satisfy what

8060

* request, and it computes the network reassignment from the passed collection of requests to

8061

* network match to the one that the system should now have. That data is encoded in an

8062

* object that is a list of changes, each of them having an NRI, and old satisfier, and a new

8063

* satisfier.

8064

*

8065

* After the reassignment is computed, it is applied to the state objects.

8066

*

8067

* @param networkRequests the nri objects to evaluate for possible network reassignment

8068

* @return NetworkReassignment listing of proposed network assignment changes

8069

*/

8070

@NonNull

8071

private NetworkReassignment computeNetworkReassignment(

8072

@NonNull final Collection<NetworkRequestInfo> networkRequests) {

8073

final NetworkReassignment changes = new NetworkReassignment();

8074

8075

// Gather the list of all relevant agents.

8076

final ArrayList<NetworkAgentInfo> nais = new ArrayList<>();

8077

for (final NetworkAgentInfo nai : mNetworkAgentInfos) {

8078

if (!nai.everConnected) {

continue;

}

nais.add(nai);

}

for (final NetworkRequestInfo nri : networkRequests) {

8085

// Non-multilayer listen requests can be ignored.

8086

if (!nri.isMultilayerRequest() && nri.mRequests.get(0).isListen()) {

8087

continue;

8088

}

8089

NetworkAgentInfo bestNetwork = null;

8090

NetworkRequest bestRequest = null;

8091

for (final NetworkRequest req : nri.mRequests) {

8092

bestNetwork = mNetworkRanker.getBestNetwork(req, nais, nri.getSatisfier());

8093

// Stop evaluating as the highest possible priority request is satisfied.

8094

if (null != bestNetwork) {

bestRequest = req;

break;

}

}

if (null == bestNetwork && isDefaultBlocked(nri)) {

8100

// Remove default networking if disallowed for managed default requests.

8101

bestNetwork = mNoServiceNetwork;

8102

}

8103

if (nri.getSatisfier() != bestNetwork) {

8104

// bestNetwork may be null if no network can satisfy this request.

8105

changes.addRequestReassignment(new NetworkReassignment.RequestReassignment(

8106

nri, nri.mActiveRequest, bestRequest, nri.getSatisfier(), bestNetwork));

}

}

return changes;

}

private Set<NetworkRequestInfo> getNrisFromGlobalRequests() {

8113

return new HashSet<>(mNetworkRequests.values());

}

/**

* Attempt to rematch all Networks with all NetworkRequests. This may result in Networks

8118

* being disconnected.

8119

*/

8120

private void rematchAllNetworksAndRequests() {

8121

rematchNetworksAndRequests(getNrisFromGlobalRequests());

}

/**

* Attempt to rematch all Networks with given NetworkRequests. This may result in Networks

8126

* being disconnected.

8127

*/

8128

private void rematchNetworksAndRequests(

8129

@NonNull final Set<NetworkRequestInfo> networkRequests) {

8130

ensureRunningOnConnectivityServiceThread();

8131

// TODO: This may be slow, and should be optimized.

8132

final long now = SystemClock.elapsedRealtime();

8133

final NetworkReassignment changes = computeNetworkReassignment(networkRequests);

8134

if (VDBG || DDBG) {

8135

log(changes.debugString());

8136

} else if (DBG) {

8137

log(changes.toString()); // Shorter form, only one line of log

8138

}

8139

applyNetworkReassignment(changes, now);

issueNetworkNeeds();

}

private void applyNetworkReassignment(@NonNull final NetworkReassignment changes,

8144

final long now) {

8145

final Collection<NetworkAgentInfo> nais = mNetworkAgentInfos;

8146

8147

// Since most of the time there are only 0 or 1 background networks, it would probably

8148

// be more efficient to just use an ArrayList here. TODO : measure performance

8149

final ArraySet<NetworkAgentInfo> oldBgNetworks = new ArraySet<>();

8150

for (final NetworkAgentInfo nai : nais) {

8151

if (nai.isBackgroundNetwork()) oldBgNetworks.add(nai);

8152

}

8153

8154

// First, update the lists of satisfied requests in the network agents. This is necessary

8155

// because some code later depends on this state to be correct, most prominently computing

8156

// the linger status.

8157

for (final NetworkReassignment.RequestReassignment event :

8158

changes.getRequestReassignments()) {

8159

updateSatisfiersForRematchRequest(event.mNetworkRequestInfo,

8160

event.mOldNetworkRequest, event.mNewNetworkRequest,

8161

event.mOldNetwork, event.mNewNetwork,

now);

}

// Process default network changes if applicable.

8166

processDefaultNetworkChanges(changes);

8167

8168

// Notify requested networks are available after the default net is switched, but

8169

// before LegacyTypeTracker sends legacy broadcasts

8170

for (final NetworkReassignment.RequestReassignment event :

8171

changes.getRequestReassignments()) {

8172

if (null != event.mNewNetwork) {

8173

notifyNetworkAvailable(event.mNewNetwork, event.mNetworkRequestInfo);

8174

} else {

8175

callCallbackForRequest(event.mNetworkRequestInfo, event.mOldNetwork,

8176

ConnectivityManager.CALLBACK_LOST, 0);

}

}

// Update the inactivity state before processing listen callbacks, because the background

8181

// computation depends on whether the network is inactive. Don't send the LOSING callbacks

8182

// just yet though, because they have to be sent after the listens are processed to keep

8183

// backward compatibility.

8184

final ArrayList<NetworkAgentInfo> inactiveNetworks = new ArrayList<>();

8185

for (final NetworkAgentInfo nai : nais) {

8186

// Rematching may have altered the inactivity state of some networks, so update all

8187

// inactivity timers. updateInactivityState reads the state from the network agent

8188

// and does nothing if the state has not changed : the source of truth is controlled

8189

// with NetworkAgentInfo#lingerRequest and NetworkAgentInfo#unlingerRequest, which

8190

// have been called while rematching the individual networks above.

8191

if (updateInactivityState(nai, now)) {

8192

inactiveNetworks.add(nai);

}

}

for (final NetworkAgentInfo nai : nais) {

8197

if (!nai.everConnected) continue;

8198

final boolean oldBackground = oldBgNetworks.contains(nai);

8199

// Process listen requests and update capabilities if the background state has

8200

// changed for this network. For consistency with previous behavior, send onLost

8201

// callbacks before onAvailable.

8202

processNewlyLostListenRequests(nai);

8203

if (oldBackground != nai.isBackgroundNetwork()) {

8204

applyBackgroundChangeForRematch(nai);

8205

}

8206

processNewlySatisfiedListenRequests(nai);

8207

}

8208

8209

for (final NetworkAgentInfo nai : inactiveNetworks) {

8210

// For nascent networks, if connecting with no foreground request, skip broadcasting

8211

// LOSING for backward compatibility. This is typical when mobile data connected while

8212

// wifi connected with mobile data always-on enabled.

8213

if (nai.isNascent()) continue;

8214

notifyNetworkLosing(nai, now);

8215

}

8216

8217

updateLegacyTypeTrackerAndVpnLockdownForRematch(changes, nais);

8218

8219

// Tear down all unneeded networks.

8220

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

8221

if (unneeded(nai, UnneededFor.TEARDOWN)) {

8222

if (nai.getInactivityExpiry() > 0) {

8223

// This network has active linger timers and no requests, but is not

8224

// lingering. Linger it.

8225

//

8226

// One way (the only way?) this can happen if this network is unvalidated

8227

// and became unneeded due to another network improving its score to the

8228

// point where this network will no longer be able to satisfy any requests

8229

// even if it validates.

8230

if (updateInactivityState(nai, now)) {

8231

notifyNetworkLosing(nai, now);

8232

}

8233

} else {

8234

if (DBG) log("Reaping " + nai.toShortString());

8235

teardownUnneededNetwork(nai);

}

}

}

}

/**

* Apply a change in background state resulting from rematching networks with requests.

8243

*

8244

* During rematch, a network may change background states by starting to satisfy or stopping

8245

* to satisfy a foreground request. Listens don't count for this. When a network changes

8246

* background states, its capabilities need to be updated and callbacks fired for the

8247

* capability change.

8248

*

8249

* @param nai The network that changed background states

8250

*/

8251

private void applyBackgroundChangeForRematch(@NonNull final NetworkAgentInfo nai) {

8252

final NetworkCapabilities newNc = mixInCapabilities(nai, nai.networkCapabilities);

8253

if (Objects.equals(nai.networkCapabilities, newNc)) return;

8254

updateNetworkPermissions(nai, newNc);

8255

nai.getAndSetNetworkCapabilities(newNc);

8256

notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED);

8257

}

8258

8259

private void updateLegacyTypeTrackerAndVpnLockdownForRematch(

8260

@NonNull final NetworkReassignment changes,

8261

@NonNull final Collection<NetworkAgentInfo> nais) {

8262

final NetworkReassignment.RequestReassignment reassignmentOfDefault =

8263

changes.getReassignment(mDefaultRequest);

8264

final NetworkAgentInfo oldDefaultNetwork =

8265

null != reassignmentOfDefault ? reassignmentOfDefault.mOldNetwork : null;

8266

final NetworkAgentInfo newDefaultNetwork =

8267

null != reassignmentOfDefault ? reassignmentOfDefault.mNewNetwork : null;

8268

8269

if (oldDefaultNetwork != newDefaultNetwork) {

8270

// Maintain the illusion : since the legacy API only understands one network at a time,

8271

// if the default network changed, apps should see a disconnected broadcast for the

8272

// old default network before they see a connected broadcast for the new one.

8273

if (oldDefaultNetwork != null) {

8274

mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(),

8275

oldDefaultNetwork, true);

8276

}

8277

if (newDefaultNetwork != null) {

8278

// The new default network can be newly null if and only if the old default

8279

// network doesn't satisfy the default request any more because it lost a

8280

// capability.

8281

mDefaultInetConditionPublished = newDefaultNetwork.lastValidated ? 100 : 0;

8282

mLegacyTypeTracker.add(

8283

newDefaultNetwork.networkInfo.getType(), newDefaultNetwork);

}

}

// Now that all the callbacks have been sent, send the legacy network broadcasts

8288

// as needed. This is necessary so that legacy requests correctly bind dns

8289

// requests to this network. The legacy users are listening for this broadcast

8290

// and will generally do a dns request so they can ensureRouteToHost and if

8291

// they do that before the callbacks happen they'll use the default network.

8292

//

8293

// TODO: Is there still a race here? The legacy broadcast will be sent after sending

8294

// callbacks, but if apps can receive the broadcast before the callback, they still might

8295

// have an inconsistent view of networking.

8296

//

8297

// This *does* introduce a race where if the user uses the new api

8298

// (notification callbacks) and then uses the old api (getNetworkInfo(type))

8299

// they may get old info. Reverse this after the old startUsing api is removed.

8300

// This is on top of the multiple intent sequencing referenced in the todo above.

8301

for (NetworkAgentInfo nai : nais) {

8302

if (nai.everConnected) {

8303

addNetworkToLegacyTypeTracker(nai);

}

}

}

private void issueNetworkNeeds() {

8309

ensureRunningOnConnectivityServiceThread();

8310

for (final NetworkOfferInfo noi : mNetworkOffers) {

8311

issueNetworkNeeds(noi);

}

}

private void issueNetworkNeeds(@NonNull final NetworkOfferInfo noi) {

8316

ensureRunningOnConnectivityServiceThread();

8317

for (final NetworkRequestInfo nri : mNetworkRequests.values()) {

8318

informOffer(nri, noi.offer, mNetworkRanker);

}

}

/**

* Inform a NetworkOffer about any new situation of a request.

8324

*

8325

* This function handles updates to offers. A number of events may happen that require

8326

* updating the registrant for this offer about the situation :

8327

* • The offer itself was updated. This may lead the offer to no longer being able

8328

* to satisfy a request or beat a satisfier (and therefore be no longer needed),

8329

* or conversely being strengthened enough to beat the satisfier (and therefore

8330

* start being needed)

8331

* • The network satisfying a request changed (including cases where the request

8332

* starts or stops being satisfied). The new network may be a stronger or weaker

8333

* match than the old one, possibly affecting whether the offer is needed.

8334

* • The network satisfying a request updated their score. This may lead the offer

8335

* to no longer be able to beat it if the current satisfier got better, or

8336

* conversely start being a good choice if the current satisfier got weaker.

8337

*

8338

* @param nri The request

8339

* @param offer The offer. This may be an updated offer.

8340

*/

8341

private static void informOffer(@NonNull NetworkRequestInfo nri,

8342

@NonNull final NetworkOffer offer, @NonNull final NetworkRanker networkRanker) {

8343

final NetworkRequest activeRequest = nri.isBeingSatisfied() ? nri.getActiveRequest() : null;

8344

final NetworkAgentInfo satisfier = null != activeRequest ? nri.getSatisfier() : null;

8345

8346

// Multi-layer requests have a currently active request, the one being satisfied.

8347

// Since the system will try to bring up a better network than is currently satisfying

8348

// the request, NetworkProviders need to be told the offers matching the requests *above*

8349

// the currently satisfied one are needed, that the ones *below* the satisfied one are

8350

// not needed, and the offer is needed for the active request iff the offer can beat

8351

// the satisfier.

8352

// For non-multilayer requests, the logic above gracefully degenerates to only the

8353

// last case.

8354

// To achieve this, the loop below will proceed in three steps. In a first phase, inform

8355

// providers that the offer is needed for this request, until the active request is found.

8356

// In a second phase, deal with the currently active request. In a third phase, inform

8357

// the providers that offer is unneeded for the remaining requests.

8358

8359

// First phase : inform providers of all requests above the active request.

8360

int i;

8361

for (i = 0; nri.mRequests.size() > i; ++i) {

8362

final NetworkRequest request = nri.mRequests.get(i);

8363

if (activeRequest == request) break; // Found the active request : go to phase 2

8364

if (!request.isRequest()) continue; // Listens/track defaults are never sent to offers

8365

// Since this request is higher-priority than the one currently satisfied, if the

8366

// offer can satisfy it, the provider should try and bring up the network for sure ;

8367

// no need to even ask the ranker – an offer that can satisfy is always better than

8368

// no network. Hence tell the provider so unless it already knew.

8369

if (request.canBeSatisfiedBy(offer.caps) && !offer.neededFor(request)) {

8370

offer.onNetworkNeeded(request);

}

}

// Second phase : deal with the active request (if any)

8375

if (null != activeRequest && activeRequest.isRequest()) {

8376

final boolean oldNeeded = offer.neededFor(activeRequest);

Junyu Lai

dc3a7a3

2021-05-26 12:23:56 +0000

[diff] [blame]

8377

// If an offer can satisfy the request, it is considered needed if it is currently

8378

// served by this provider or if this offer can beat the current satisfier.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8379

final boolean currentlyServing = satisfier != null

Junyu Lai

dc3a7a3

2021-05-26 12:23:56 +0000

[diff] [blame]

8380

&& satisfier.factorySerialNumber == offer.providerId

8381

&& activeRequest.canBeSatisfiedBy(offer.caps);

8382

final boolean newNeeded = currentlyServing

8383

|| networkRanker.mightBeat(activeRequest, satisfier, offer);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8384

if (newNeeded != oldNeeded) {

8385

if (newNeeded) {

8386

offer.onNetworkNeeded(activeRequest);

8387

} else {

8388

// The offer used to be able to beat the satisfier. Now it can't.

8389

offer.onNetworkUnneeded(activeRequest);

}

}

}

// Third phase : inform the providers that the offer isn't needed for any request

8395

// below the active one.

8396

for (++i /* skip the active request */; nri.mRequests.size() > i; ++i) {

8397

final NetworkRequest request = nri.mRequests.get(i);

8398

if (!request.isRequest()) continue; // Listens/track defaults are never sent to offers

8399

// Since this request is lower-priority than the one currently satisfied, if the

8400

// offer can satisfy it, the provider should not try and bring up the network.

8401

// Hence tell the provider so unless it already knew.

8402

if (offer.neededFor(request)) {

8403

offer.onNetworkUnneeded(request);

}

}

}

private void addNetworkToLegacyTypeTracker(@NonNull final NetworkAgentInfo nai) {

8409

for (int i = 0; i < nai.numNetworkRequests(); i++) {

8410

NetworkRequest nr = nai.requestAt(i);

8411

if (nr.legacyType != TYPE_NONE && nr.isRequest()) {

8412

// legacy type tracker filters out repeat adds

8413

mLegacyTypeTracker.add(nr.legacyType, nai);

}

}

// A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above,

8418

// because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest

8419

// wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the

8420

// newNetwork to the tracker explicitly (it's a no-op if it has already been added).

8421

if (nai.isVPN()) {

8422

mLegacyTypeTracker.add(TYPE_VPN, nai);

}

}

private void updateInetCondition(NetworkAgentInfo nai) {

8427

// Don't bother updating until we've graduated to validated at least once.

8428

if (!nai.everValidated) return;

8429

// For now only update icons for the default connection.

8430

// TODO: Update WiFi and cellular icons separately. b/17237507

8431

if (!isDefaultNetwork(nai)) return;

8432

8433

int newInetCondition = nai.lastValidated ? 100 : 0;

8434

// Don't repeat publish.

8435

if (newInetCondition == mDefaultInetConditionPublished) return;

8436

8437

mDefaultInetConditionPublished = newInetCondition;

8438

sendInetConditionBroadcast(nai.networkInfo);

}

@NonNull

private NetworkInfo mixInInfo(@NonNull final NetworkAgentInfo nai, @NonNull NetworkInfo info) {

8443

final NetworkInfo newInfo = new NetworkInfo(info);

8444

// The suspended and roaming bits are managed in NetworkCapabilities.

8445

final boolean suspended =

8446

!nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_SUSPENDED);

8447

if (suspended && info.getDetailedState() == NetworkInfo.DetailedState.CONNECTED) {

8448

// Only override the state with SUSPENDED if the network is currently in CONNECTED

8449

// state. This is because the network could have been suspended before connecting,

8450

// or it could be disconnecting while being suspended, and in both these cases

8451

// the state should not be overridden. Note that the only detailed state that

8452

// maps to State.CONNECTED is DetailedState.CONNECTED, so there is also no need to

8453

// worry about multiple different substates of CONNECTED.

8454

newInfo.setDetailedState(NetworkInfo.DetailedState.SUSPENDED, info.getReason(),

8455

info.getExtraInfo());

8456

} else if (!suspended && info.getDetailedState() == NetworkInfo.DetailedState.SUSPENDED) {

8457

// SUSPENDED state is currently only overridden from CONNECTED state. In the case the

8458

// network agent is created, then goes to suspended, then goes out of suspended without

8459

// ever setting connected. Check if network agent is ever connected to update the state.

8460

newInfo.setDetailedState(nai.everConnected

8461

? NetworkInfo.DetailedState.CONNECTED

8462

: NetworkInfo.DetailedState.CONNECTING,

8463

info.getReason(),

8464

info.getExtraInfo());

8465

}

8466

newInfo.setRoaming(!nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_ROAMING));

return newInfo;

}

private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo info) {

8471

final NetworkInfo newInfo = mixInInfo(networkAgent, info);

8472

8473

final NetworkInfo.State state = newInfo.getState();

8474

NetworkInfo oldInfo = null;

8475

synchronized (networkAgent) {

8476

oldInfo = networkAgent.networkInfo;

8477

networkAgent.networkInfo = newInfo;

}

if (DBG) {

log(networkAgent.toShortString() + " EVENT_NETWORK_INFO_CHANGED, going from "

8482

+ oldInfo.getState() + " to " + state);

8483

}

8484

8485

if (!networkAgent.created

8486

&& (state == NetworkInfo.State.CONNECTED

8487

|| (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) {

8488

8489

// A network that has just connected has zero requests and is thus a foreground network.

8490

networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND);

8491

8492

if (!createNativeNetwork(networkAgent)) return;

Lorenzo Colitti

2021-07-02 11:47:57 +0900

[diff] [blame]

8493

if (networkAgent.propagateUnderlyingCapabilities()) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8494

// Initialize the network's capabilities to their starting values according to the

8495

// underlying networks. This ensures that the capabilities are correct before

8496

// anything happens to the network.

8497

updateCapabilitiesForNetwork(networkAgent);

8498

}

8499

networkAgent.created = true;

8500

networkAgent.onNetworkCreated();

8501

}

8502

8503

if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) {

8504

networkAgent.everConnected = true;

8505

8506

// NetworkCapabilities need to be set before sending the private DNS config to

8507

// NetworkMonitor, otherwise NetworkMonitor cannot determine if validation is required.

8508

networkAgent.getAndSetNetworkCapabilities(networkAgent.networkCapabilities);

8509

8510

handlePerNetworkPrivateDnsConfig(networkAgent, mDnsManager.getPrivateDnsConfig());

8511

updateLinkProperties(networkAgent, new LinkProperties(networkAgent.linkProperties),

8512

null);

8513

8514

// Until parceled LinkProperties are sent directly to NetworkMonitor, the connect

8515

// command must be sent after updating LinkProperties to maximize chances of

8516

// NetworkMonitor seeing the correct LinkProperties when starting.

8517

// TODO: pass LinkProperties to the NetworkMonitor in the notifyNetworkConnected call.

8518

if (networkAgent.networkAgentConfig.acceptPartialConnectivity) {

8519

networkAgent.networkMonitor().setAcceptPartialConnectivity();

8520

}

8521

networkAgent.networkMonitor().notifyNetworkConnected(

8522

new LinkProperties(networkAgent.linkProperties,

8523

true /* parcelSensitiveFields */),

8524

networkAgent.networkCapabilities);

8525

scheduleUnvalidatedPrompt(networkAgent);

8526

8527

// Whether a particular NetworkRequest listen should cause signal strength thresholds to

8528

// be communicated to a particular NetworkAgent depends only on the network's immutable,

8529

// capabilities, so it only needs to be done once on initial connect, not every time the

8530

// network's capabilities change. Note that we do this before rematching the network,

8531

// so we could decide to tear it down immediately afterwards. That's fine though - on

8532

// disconnection NetworkAgents should stop any signal strength monitoring they have been

8533

// doing.

8534

updateSignalStrengthThresholds(networkAgent, "CONNECT", null);

8535

8536

// Before first rematching networks, put an inactivity timer without any request, this

8537

// allows {@code updateInactivityState} to update the state accordingly and prevent

8538

// tearing down for any {@code unneeded} evaluation in this period.

8539

// Note that the timer will not be rescheduled since the expiry time is

8540

// fixed after connection regardless of the network satisfying other requests or not.

8541

// But it will be removed as soon as the network satisfies a request for the first time.

8542

networkAgent.lingerRequest(NetworkRequest.REQUEST_ID_NONE,

8543

SystemClock.elapsedRealtime(), mNascentDelayMs);

8544

networkAgent.setInactive();

8545

8546

// Consider network even though it is not yet validated.

8547

rematchAllNetworksAndRequests();

8548

8549

// This has to happen after matching the requests, because callbacks are just requests.

8550

notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK);

8551

} else if (state == NetworkInfo.State.DISCONNECTED) {

8552

networkAgent.disconnect();

8553

if (networkAgent.isVPN()) {

8554

updateUids(networkAgent, networkAgent.networkCapabilities, null);

8555

}

8556

disconnectAndDestroyNetwork(networkAgent);

8557

if (networkAgent.isVPN()) {

8558

// As the active or bound network changes for apps, broadcast the default proxy, as

8559

// apps may need to update their proxy data. This is called after disconnecting from

8560

// VPN to make sure we do not broadcast the old proxy data.

8561

// TODO(b/122649188): send the broadcast only to VPN users.

8562

mProxyTracker.sendProxyBroadcast();

8563

}

8564

} else if (networkAgent.created && (oldInfo.getState() == NetworkInfo.State.SUSPENDED ||

8565

state == NetworkInfo.State.SUSPENDED)) {

8566

mLegacyTypeTracker.update(networkAgent);

}

}

private void updateNetworkScore(@NonNull final NetworkAgentInfo nai, final NetworkScore score) {

8571

if (VDBG || DDBG) log("updateNetworkScore for " + nai.toShortString() + " to " + score);

8572

nai.setScore(score);

8573

rematchAllNetworksAndRequests();

8574

}

8575

8576

// Notify only this one new request of the current state. Transfer all the

8577

// current state by calling NetworkCapabilities and LinkProperties callbacks

8578

// so that callers can be guaranteed to have as close to atomicity in state

8579

// transfer as can be supported by this current API.

8580

protected void notifyNetworkAvailable(NetworkAgentInfo nai, NetworkRequestInfo nri) {

8581

mHandler.removeMessages(EVENT_TIMEOUT_NETWORK_REQUEST, nri);

8582

if (nri.mPendingIntent != null) {

8583

sendPendingIntentForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE);

8584

// Attempt no subsequent state pushes where intents are involved.

return;

}

final int blockedReasons = mUidBlockedReasons.get(nri.mAsUid, BLOCKED_REASON_NONE);

8589

final boolean metered = nai.networkCapabilities.isMetered();

8590

final boolean vpnBlocked = isUidBlockedByVpn(nri.mAsUid, mVpnBlockedUidRanges);

8591

callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE,

8592

getBlockedState(blockedReasons, metered, vpnBlocked));

8593

}

8594

8595

// Notify the requests on this NAI that the network is now lingered.

8596

private void notifyNetworkLosing(@NonNull final NetworkAgentInfo nai, final long now) {

8597

final int lingerTime = (int) (nai.getInactivityExpiry() - now);

8598

notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime);

8599

}

8600

8601

private static int getBlockedState(int reasons, boolean metered, boolean vpnBlocked) {

8602

if (!metered) reasons &= ~BLOCKED_METERED_REASON_MASK;

8603

return vpnBlocked

8604

? reasons | BLOCKED_REASON_LOCKDOWN_VPN

8605

: reasons & ~BLOCKED_REASON_LOCKDOWN_VPN;

8606

}

8607

8608

private void setUidBlockedReasons(int uid, @BlockedReason int blockedReasons) {

8609

if (blockedReasons == BLOCKED_REASON_NONE) {

8610

mUidBlockedReasons.delete(uid);

8611

} else {

8612

mUidBlockedReasons.put(uid, blockedReasons);

}

}

/**

* Notify of the blocked state apps with a registered callback matching a given NAI.

8618

*

8619

* Unlike other callbacks, blocked status is different between each individual uid. So for

8620

* any given nai, all requests need to be considered according to the uid who filed it.

8621

*

8622

* @param nai The target NetworkAgentInfo.

8623

* @param oldMetered True if the previous network capabilities were metered.

8624

* @param newMetered True if the current network capabilities are metered.

8625

* @param oldBlockedUidRanges list of UID ranges previously blocked by lockdown VPN.

8626

* @param newBlockedUidRanges list of UID ranges blocked by lockdown VPN.

8627

*/

8628

private void maybeNotifyNetworkBlocked(NetworkAgentInfo nai, boolean oldMetered,

8629

boolean newMetered, List<UidRange> oldBlockedUidRanges,

8630

List<UidRange> newBlockedUidRanges) {

8631

8632

for (int i = 0; i < nai.numNetworkRequests(); i++) {

8633

NetworkRequest nr = nai.requestAt(i);

8634

NetworkRequestInfo nri = mNetworkRequests.get(nr);

8635

8636

final int blockedReasons = mUidBlockedReasons.get(nri.mAsUid, BLOCKED_REASON_NONE);

8637

final boolean oldVpnBlocked = isUidBlockedByVpn(nri.mAsUid, oldBlockedUidRanges);

8638

final boolean newVpnBlocked = (oldBlockedUidRanges != newBlockedUidRanges)

8639

? isUidBlockedByVpn(nri.mAsUid, newBlockedUidRanges)

8640

: oldVpnBlocked;

8641

8642

final int oldBlockedState = getBlockedState(blockedReasons, oldMetered, oldVpnBlocked);

8643

final int newBlockedState = getBlockedState(blockedReasons, newMetered, newVpnBlocked);

8644

if (oldBlockedState != newBlockedState) {

8645

callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_BLK_CHANGED,

newBlockedState);

}

}

}

/**

* Notify apps with a given UID of the new blocked state according to new uid state.

8653

* @param uid The uid for which the rules changed.

8654

* @param blockedReasons The reasons for why an uid is blocked.

8655

*/

8656

private void maybeNotifyNetworkBlockedForNewState(int uid, @BlockedReason int blockedReasons) {

8657

for (final NetworkAgentInfo nai : mNetworkAgentInfos) {

8658

final boolean metered = nai.networkCapabilities.isMetered();

8659

final boolean vpnBlocked = isUidBlockedByVpn(uid, mVpnBlockedUidRanges);

8660

8661

final int oldBlockedState = getBlockedState(

8662

mUidBlockedReasons.get(uid, BLOCKED_REASON_NONE), metered, vpnBlocked);

8663

final int newBlockedState = getBlockedState(blockedReasons, metered, vpnBlocked);

8664

if (oldBlockedState == newBlockedState) {

8665

continue;

8666

}

8667

for (int i = 0; i < nai.numNetworkRequests(); i++) {

8668

NetworkRequest nr = nai.requestAt(i);

8669

NetworkRequestInfo nri = mNetworkRequests.get(nr);

8670

if (nri != null && nri.mAsUid == uid) {

8671

callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_BLK_CHANGED,

newBlockedState);

}

}

}

}

@VisibleForTesting

protected void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) {

8680

// The NetworkInfo we actually send out has no bearing on the real

8681

// state of affairs. For example, if the default connection is mobile,

8682

// and a request for HIPRI has just gone away, we need to pretend that

8683

// HIPRI has just disconnected. So we need to set the type to HIPRI and

8684

// the state to DISCONNECTED, even though the network is of type MOBILE

8685

// and is still connected.

8686

NetworkInfo info = new NetworkInfo(nai.networkInfo);

8687

info.setType(type);

8688

filterForLegacyLockdown(info);

8689

if (state != DetailedState.DISCONNECTED) {

8690

info.setDetailedState(state, null, info.getExtraInfo());

8691

sendConnectedBroadcast(info);

8692

} else {

8693

info.setDetailedState(state, info.getReason(), info.getExtraInfo());

8694

Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);

8695

intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);

8696

intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType());

8697

if (info.isFailover()) {

8698

intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);

8699

nai.networkInfo.setFailover(false);

8700

}

8701

if (info.getReason() != null) {

8702

intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());

8703

}

8704

if (info.getExtraInfo() != null) {

8705

intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo());

8706

}

8707

NetworkAgentInfo newDefaultAgent = null;

8708

if (nai.isSatisfyingRequest(mDefaultRequest.mRequests.get(0).requestId)) {

8709

newDefaultAgent = mDefaultRequest.getSatisfier();

8710

if (newDefaultAgent != null) {

8711

intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO,

8712

newDefaultAgent.networkInfo);

8713

} else {

8714

intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);

8715

}

8716

}

8717

intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION,

8718

mDefaultInetConditionPublished);

8719

sendStickyBroadcast(intent);

8720

if (newDefaultAgent != null) {

8721

sendConnectedBroadcast(newDefaultAgent.networkInfo);

}

}

}

protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) {

8727

if (VDBG || DDBG) {

8728

String notification = ConnectivityManager.getCallbackName(notifyType);

8729

log("notifyType " + notification + " for " + networkAgent.toShortString());

8730

}

8731

for (int i = 0; i < networkAgent.numNetworkRequests(); i++) {

8732

NetworkRequest nr = networkAgent.requestAt(i);

8733

NetworkRequestInfo nri = mNetworkRequests.get(nr);

8734

if (VDBG) log(" sending notification for " + nr);

8735

if (nri.mPendingIntent == null) {

8736

callCallbackForRequest(nri, networkAgent, notifyType, arg1);

8737

} else {

8738

sendPendingIntentForRequest(nri, networkAgent, notifyType);

}

}

}

protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) {

8744

notifyNetworkCallbacks(networkAgent, notifyType, 0);

}

/**

* Returns the list of all interfaces that could be used by network traffic that does not

8749

* explicitly specify a network. This includes the default network, but also all VPNs that are

8750

* currently connected.

8751

*

8752

* Must be called on the handler thread.

8753

*/

8754

@NonNull

8755

private ArrayList<Network> getDefaultNetworks() {

8756

ensureRunningOnConnectivityServiceThread();

8757

final ArrayList<Network> defaultNetworks = new ArrayList<>();

8758

final Set<Integer> activeNetIds = new ArraySet<>();

8759

for (final NetworkRequestInfo nri : mDefaultNetworkRequests) {

8760

if (nri.isBeingSatisfied()) {

8761

activeNetIds.add(nri.getSatisfier().network().netId);

8762

}

8763

}

8764

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

8765

if (nai.everConnected && (activeNetIds.contains(nai.network().netId) || nai.isVPN())) {

8766

defaultNetworks.add(nai.network);

8767

}

8768

}

8769

return defaultNetworks;

}

/**

* Notify NetworkStatsService that the set of active ifaces has changed, or that one of the

8774

* active iface's tracked properties has changed.

8775

*/

8776

private void notifyIfacesChangedForNetworkStats() {

8777

ensureRunningOnConnectivityServiceThread();

8778

String activeIface = null;

8779

LinkProperties activeLinkProperties = getActiveLinkProperties();

8780

if (activeLinkProperties != null) {

8781

activeIface = activeLinkProperties.getInterfaceName();

8782

}

8783

8784

final UnderlyingNetworkInfo[] underlyingNetworkInfos = getAllVpnInfo();

8785

try {

8786

final ArrayList<NetworkStateSnapshot> snapshots = new ArrayList<>();

junyulai

0f57022

2021-03-05 14:46:25 +0800

[diff] [blame]

8787

for (final NetworkStateSnapshot snapshot : getAllNetworkStateSnapshots()) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8788

snapshots.add(snapshot);

8789

}

8790

mStatsManager.notifyNetworkStatus(getDefaultNetworks(),

8791

snapshots, activeIface, Arrays.asList(underlyingNetworkInfos));

8792

} catch (Exception ignored) {

}

}

@Override

public String getCaptivePortalServerUrl() {

8798

enforceNetworkStackOrSettingsPermission();

8799

String settingUrl = mResources.get().getString(

8800

R.string.config_networkCaptivePortalServerUrl);

8801

8802

if (!TextUtils.isEmpty(settingUrl)) {

return settingUrl;

}

settingUrl = Settings.Global.getString(mContext.getContentResolver(),

8807

ConnectivitySettingsManager.CAPTIVE_PORTAL_HTTP_URL);

8808

if (!TextUtils.isEmpty(settingUrl)) {

return settingUrl;

}

return DEFAULT_CAPTIVE_PORTAL_HTTP_URL;

}

@Override

public void startNattKeepalive(Network network, int intervalSeconds,

8817

ISocketKeepaliveCallback cb, String srcAddr, int srcPort, String dstAddr) {

8818

enforceKeepalivePermission();

8819

mKeepaliveTracker.startNattKeepalive(

8820

getNetworkAgentInfoForNetwork(network), null /* fd */,

8821

intervalSeconds, cb,

8822

srcAddr, srcPort, dstAddr, NattSocketKeepalive.NATT_PORT);

}

@Override

public void startNattKeepaliveWithFd(Network network, ParcelFileDescriptor pfd, int resourceId,

8827

int intervalSeconds, ISocketKeepaliveCallback cb, String srcAddr,

8828

String dstAddr) {

8829

try {

8830

final FileDescriptor fd = pfd.getFileDescriptor();

8831

mKeepaliveTracker.startNattKeepalive(

8832

getNetworkAgentInfoForNetwork(network), fd, resourceId,

8833

intervalSeconds, cb,

8834

srcAddr, dstAddr, NattSocketKeepalive.NATT_PORT);

8835

} finally {

8836

// FileDescriptors coming from AIDL calls must be manually closed to prevent leaks.

8837

// startNattKeepalive calls Os.dup(fd) before returning, so we can close immediately.

8838

if (pfd != null && Binder.getCallingPid() != Process.myPid()) {

8839

IoUtils.closeQuietly(pfd);

}

}

}

@Override

public void startTcpKeepalive(Network network, ParcelFileDescriptor pfd, int intervalSeconds,

8846

ISocketKeepaliveCallback cb) {

8847

try {

8848

enforceKeepalivePermission();

8849

final FileDescriptor fd = pfd.getFileDescriptor();

8850

mKeepaliveTracker.startTcpKeepalive(

8851

getNetworkAgentInfoForNetwork(network), fd, intervalSeconds, cb);

8852

} finally {

8853

// FileDescriptors coming from AIDL calls must be manually closed to prevent leaks.

8854

// startTcpKeepalive calls Os.dup(fd) before returning, so we can close immediately.

8855

if (pfd != null && Binder.getCallingPid() != Process.myPid()) {

8856

IoUtils.closeQuietly(pfd);

}

}

}

@Override

public void stopKeepalive(Network network, int slot) {

8863

mHandler.sendMessage(mHandler.obtainMessage(

8864

NetworkAgent.CMD_STOP_SOCKET_KEEPALIVE, slot, SocketKeepalive.SUCCESS, network));

}

@Override

public void factoryReset() {

8869

enforceSettingsPermission();

8870

Treehugger Robot

fac2a72

2021-05-21 02:42:59 +0000

[diff] [blame]

8871

final int uid = mDeps.getCallingUid();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8872

final long token = Binder.clearCallingIdentity();

8873

try {

Treehugger Robot

fac2a72

2021-05-21 02:42:59 +0000

[diff] [blame]

8874

if (mUserManager.hasUserRestrictionForUser(UserManager.DISALLOW_NETWORK_RESET,

8875

UserHandle.getUserHandleForUid(uid))) {

return;

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8879

final IpMemoryStore ipMemoryStore = IpMemoryStore.getMemoryStore(mContext);

8880

ipMemoryStore.factoryReset();

Treehugger Robot

fac2a72

2021-05-21 02:42:59 +0000

[diff] [blame]

8881

8882

// Turn airplane mode off

8883

setAirplaneMode(false);

8884

8885

// restore private DNS settings to default mode (opportunistic)

8886

if (!mUserManager.hasUserRestrictionForUser(UserManager.DISALLOW_CONFIG_PRIVATE_DNS,

8887

UserHandle.getUserHandleForUid(uid))) {

8888

ConnectivitySettingsManager.setPrivateDnsMode(mContext,

8889

PRIVATE_DNS_MODE_OPPORTUNISTIC);

8890

}

8891

8892

Settings.Global.putString(mContext.getContentResolver(),

8893

ConnectivitySettingsManager.NETWORK_AVOID_BAD_WIFI, null);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8894

} finally {

8895

Binder.restoreCallingIdentity(token);

8896

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

@Override

public byte[] getNetworkWatchlistConfigHash() {

8901

NetworkWatchlistManager nwm = mContext.getSystemService(NetworkWatchlistManager.class);

8902

if (nwm == null) {

8903

loge("Unable to get NetworkWatchlistManager");

8904

return null;

8905

}

8906

// Redirect it to network watchlist service to access watchlist file and calculate hash.

8907

return nwm.getWatchlistConfigHash();

8908

}

8909

8910

private void logNetworkEvent(NetworkAgentInfo nai, int evtype) {

8911

int[] transports = nai.networkCapabilities.getTransportTypes();

8912

mMetricsLog.log(nai.network.getNetId(), transports, new NetworkEvent(evtype));

8913

}

8914

8915

private static boolean toBool(int encodedBoolean) {

8916

return encodedBoolean != 0; // Only 0 means false.

8917

}

8918

8919

private static int encodeBool(boolean b) {

return b ? 1 : 0;

}

@Override

public int handleShellCommand(@NonNull ParcelFileDescriptor in,

8925

@NonNull ParcelFileDescriptor out, @NonNull ParcelFileDescriptor err,

8926

@NonNull String[] args) {

8927

return new ShellCmd().exec(this, in.getFileDescriptor(), out.getFileDescriptor(),

8928

err.getFileDescriptor(), args);

8929

}

8930

8931

private class ShellCmd extends BasicShellCommandHandler {

8932

@Override

8933

public int onCommand(String cmd) {

8934

if (cmd == null) {

8935

return handleDefaultCommands(cmd);

8936

}

8937

final PrintWriter pw = getOutPrintWriter();

8938

try {

8939

switch (cmd) {

8940

case "airplane-mode":

8941

final String action = getNextArg();

8942

if ("enable".equals(action)) {

8943

setAirplaneMode(true);

8944

return 0;

8945

} else if ("disable".equals(action)) {

8946

setAirplaneMode(false);

8947

return 0;

8948

} else if (action == null) {

8949

final ContentResolver cr = mContext.getContentResolver();

8950

final int enabled = Settings.Global.getInt(cr,

8951

Settings.Global.AIRPLANE_MODE_ON);

8952

pw.println(enabled == 0 ? "disabled" : "enabled");

return 0;

} else {

onHelp();

return -1;

}

default:

return handleDefaultCommands(cmd);

8960

}

8961

} catch (Exception e) {

pw.println(e);

}

return -1;

}

@Override

public void onHelp() {

8969

PrintWriter pw = getOutPrintWriter();

8970

pw.println("Connectivity service commands:");

8971

pw.println(" help");

8972

pw.println(" Print this help text.");

8973

pw.println(" airplane-mode [enable|disable]");

8974

pw.println(" Turn airplane mode on or off.");

8975

pw.println(" airplane-mode");

8976

pw.println(" Get airplane mode.");

}

}

private int getVpnType(@Nullable NetworkAgentInfo vpn) {

8981

if (vpn == null) return VpnManager.TYPE_VPN_NONE;

8982

final TransportInfo ti = vpn.networkCapabilities.getTransportInfo();

8983

if (!(ti instanceof VpnTransportInfo)) return VpnManager.TYPE_VPN_NONE;

8984

return ((VpnTransportInfo) ti).getType();

}

/**

* @param connectionInfo the connection to resolve.

8989

* @return {@code uid} if the connection is found and the app has permission to observe it

8990

* (e.g., if it is associated with the calling VPN app's tunnel) or {@code INVALID_UID} if the

8991

* connection is not found.

8992

*/

8993

public int getConnectionOwnerUid(ConnectionInfo connectionInfo) {

8994

if (connectionInfo.protocol != IPPROTO_TCP && connectionInfo.protocol != IPPROTO_UDP) {

8995

throw new IllegalArgumentException("Unsupported protocol " + connectionInfo.protocol);

8996

}

8997

8998

final int uid = mDeps.getConnectionOwnerUid(connectionInfo.protocol,

8999

connectionInfo.local, connectionInfo.remote);

9000

9001

if (uid == INVALID_UID) return uid; // Not found.

9002

9003

// Connection owner UIDs are visible only to the network stack and to the VpnService-based

9004

// VPN, if any, that applies to the UID that owns the connection.

9005

if (checkNetworkStackPermission()) return uid;

9006

9007

final NetworkAgentInfo vpn = getVpnForUid(uid);

9008

if (vpn == null || getVpnType(vpn) != VpnManager.TYPE_VPN_SERVICE

9009

|| vpn.networkCapabilities.getOwnerUid() != mDeps.getCallingUid()) {

return INVALID_UID;

}

return uid;

}

/**

* Returns a IBinder to a TestNetworkService. Will be lazily created as needed.

9018

*

9019

* The TestNetworkService must be run in the system server due to TUN creation.

9020

*/

9021

@Override

9022

public IBinder startOrGetTestNetworkService() {

9023

synchronized (mTNSLock) {

9024

TestNetworkService.enforceTestNetworkPermissions(mContext);

9025

9026

if (mTNS == null) {

9027

mTNS = new TestNetworkService(mContext);

}

return mTNS;

}

}

/**

* Handler used for managing all Connectivity Diagnostics related functions.

9036

*

9037

* @see android.net.ConnectivityDiagnosticsManager

9038

*

9039

* TODO(b/147816404): Explore moving ConnectivityDiagnosticsHandler to a separate file

9040

*/

9041

@VisibleForTesting

9042

class ConnectivityDiagnosticsHandler extends Handler {

9043

private final String mTag = ConnectivityDiagnosticsHandler.class.getSimpleName();

9044

9045

/**

9046

* Used to handle ConnectivityDiagnosticsCallback registration events from {@link

9047

* android.net.ConnectivityDiagnosticsManager}.

9048

* obj = ConnectivityDiagnosticsCallbackInfo with IConnectivityDiagnosticsCallback and

9049

* NetworkRequestInfo to be registered

9050

*/

9051

private static final int EVENT_REGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK = 1;

9052

9053

/**

9054

* Used to handle ConnectivityDiagnosticsCallback unregister events from {@link

9055

* android.net.ConnectivityDiagnosticsManager}.

9056

* obj = the IConnectivityDiagnosticsCallback to be unregistered

9057

* arg1 = the uid of the caller

9058

*/

9059

private static final int EVENT_UNREGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK = 2;

9060

9061

/**

9062

* Event for {@link NetworkStateTrackerHandler} to trigger ConnectivityReport callbacks

9063

* after processing {@link #EVENT_NETWORK_TESTED} events.

9064

* obj = {@link ConnectivityReportEvent} representing ConnectivityReport info reported from

9065

* NetworkMonitor.

9066

* data = PersistableBundle of extras passed from NetworkMonitor.

9067

*

9068

* See {@link ConnectivityService#EVENT_NETWORK_TESTED}.

9069

*/

9070

private static final int EVENT_NETWORK_TESTED = ConnectivityService.EVENT_NETWORK_TESTED;

9071

9072

/**

9073

* Event for NetworkMonitor to inform ConnectivityService that a potential data stall has

9074

* been detected on the network.

9075

* obj = Long the timestamp (in millis) for when the suspected data stall was detected.

9076

* arg1 = {@link DataStallReport#DetectionMethod} indicating the detection method.

9077

* arg2 = NetID.

9078

* data = PersistableBundle of extras passed from NetworkMonitor.

9079

*/

9080

private static final int EVENT_DATA_STALL_SUSPECTED = 4;

9081

9082

/**

9083

* Event for ConnectivityDiagnosticsHandler to handle network connectivity being reported to

9084

* the platform. This event will invoke {@link

9085

* IConnectivityDiagnosticsCallback#onNetworkConnectivityReported} for permissioned

9086

* callbacks.

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9087

* obj = ReportedNetworkConnectivityInfo with info on reported Network connectivity.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9088

*/

9089

private static final int EVENT_NETWORK_CONNECTIVITY_REPORTED = 5;

9090

9091

private ConnectivityDiagnosticsHandler(Looper looper) {

super(looper);

}

@Override

public void handleMessage(Message msg) {

9097

switch (msg.what) {

9098

case EVENT_REGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK: {

9099

handleRegisterConnectivityDiagnosticsCallback(

9100

(ConnectivityDiagnosticsCallbackInfo) msg.obj);

9101

break;

9102

}

9103

case EVENT_UNREGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK: {

9104

handleUnregisterConnectivityDiagnosticsCallback(

9105

(IConnectivityDiagnosticsCallback) msg.obj, msg.arg1);

9106

break;

9107

}

9108

case EVENT_NETWORK_TESTED: {

9109

final ConnectivityReportEvent reportEvent =

9110

(ConnectivityReportEvent) msg.obj;

9111

9112

handleNetworkTestedWithExtras(reportEvent, reportEvent.mExtras);

9113

break;

9114

}

9115

case EVENT_DATA_STALL_SUSPECTED: {

9116

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(msg.arg2);

9117

final Pair<Long, PersistableBundle> arg =

9118

(Pair<Long, PersistableBundle>) msg.obj;

9119

if (nai == null) break;

9120

9121

handleDataStallSuspected(nai, arg.first, msg.arg1, arg.second);

9122

break;

9123

}

9124

case EVENT_NETWORK_CONNECTIVITY_REPORTED: {

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9125

handleNetworkConnectivityReported((ReportedNetworkConnectivityInfo) msg.obj);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

break;

}

default: {

Log.e(mTag, "Unrecognized event in ConnectivityDiagnostics: " + msg.what);

}

}

}

}

/** Class used for cleaning up IConnectivityDiagnosticsCallback instances after their death. */

9136

@VisibleForTesting

9137

class ConnectivityDiagnosticsCallbackInfo implements Binder.DeathRecipient {

9138

@NonNull private final IConnectivityDiagnosticsCallback mCb;

9139

@NonNull private final NetworkRequestInfo mRequestInfo;

9140

@NonNull private final String mCallingPackageName;

9141

9142

@VisibleForTesting

9143

ConnectivityDiagnosticsCallbackInfo(

9144

@NonNull IConnectivityDiagnosticsCallback cb,

9145

@NonNull NetworkRequestInfo nri,

9146

@NonNull String callingPackageName) {

9147

mCb = cb;

9148

mRequestInfo = nri;

9149

mCallingPackageName = callingPackageName;

}

@Override

public void binderDied() {

9154

log("ConnectivityDiagnosticsCallback IBinder died.");

9155

unregisterConnectivityDiagnosticsCallback(mCb);

}

}

/**

* Class used for sending information from {@link

9161

* NetworkMonitorCallbacks#notifyNetworkTestedWithExtras} to the handler for processing it.

9162

*/

9163

private static class NetworkTestedResults {

9164

private final int mNetId;

9165

private final int mTestResult;

9166

private final long mTimestampMillis;

9167

@Nullable private final String mRedirectUrl;

9168

9169

private NetworkTestedResults(

9170

int netId, int testResult, long timestampMillis, @Nullable String redirectUrl) {

9171

mNetId = netId;

9172

mTestResult = testResult;

9173

mTimestampMillis = timestampMillis;

9174

mRedirectUrl = redirectUrl;

}

}

/**

* Class used for sending information from {@link NetworkStateTrackerHandler} to {@link

9180

* ConnectivityDiagnosticsHandler}.

9181

*/

9182

private static class ConnectivityReportEvent {

9183

private final long mTimestampMillis;

9184

@NonNull private final NetworkAgentInfo mNai;

9185

private final PersistableBundle mExtras;

9186

9187

private ConnectivityReportEvent(long timestampMillis, @NonNull NetworkAgentInfo nai,

9188

PersistableBundle p) {

9189

mTimestampMillis = timestampMillis;

mNai = nai;

mExtras = p;

}

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9195

/**

9196

* Class used for sending info for a call to {@link #reportNetworkConnectivity()} to {@link

9197

* ConnectivityDiagnosticsHandler}.

9198

*/

9199

private static class ReportedNetworkConnectivityInfo {

9200

public final boolean hasConnectivity;

9201

public final boolean isNetworkRevalidating;

9202

public final int reporterUid;

9203

@NonNull public final NetworkAgentInfo nai;

9204

9205

private ReportedNetworkConnectivityInfo(

9206

boolean hasConnectivity,

9207

boolean isNetworkRevalidating,

9208

int reporterUid,

9209

@NonNull NetworkAgentInfo nai) {

9210

this.hasConnectivity = hasConnectivity;

9211

this.isNetworkRevalidating = isNetworkRevalidating;

9212

this.reporterUid = reporterUid;

this.nai = nai;

}

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9217

private void handleRegisterConnectivityDiagnosticsCallback(

9218

@NonNull ConnectivityDiagnosticsCallbackInfo cbInfo) {

9219

ensureRunningOnConnectivityServiceThread();

9220

9221

final IConnectivityDiagnosticsCallback cb = cbInfo.mCb;

9222

final IBinder iCb = cb.asBinder();

9223

final NetworkRequestInfo nri = cbInfo.mRequestInfo;

9224

9225

// Connectivity Diagnostics are meant to be used with a single network request. It would be

9226

// confusing for these networks to change when an NRI is satisfied in another layer.

9227

if (nri.isMultilayerRequest()) {

9228

throw new IllegalArgumentException("Connectivity Diagnostics do not support multilayer "

9229

+ "network requests.");

9230

}

9231

9232

// This means that the client registered the same callback multiple times. Do

9233

// not override the previous entry, and exit silently.

9234

if (mConnectivityDiagnosticsCallbacks.containsKey(iCb)) {

9235

if (VDBG) log("Diagnostics callback is already registered");

9236

9237

// Decrement the reference count for this NetworkRequestInfo. The reference count is

9238

// incremented when the NetworkRequestInfo is created as part of

9239

// enforceRequestCountLimit().

9240

nri.decrementRequestCount();

return;

}

mConnectivityDiagnosticsCallbacks.put(iCb, cbInfo);

9245

9246

try {

9247

iCb.linkToDeath(cbInfo, 0);

9248

} catch (RemoteException e) {

cbInfo.binderDied();

return;

}

// Once registered, provide ConnectivityReports for matching Networks

9254

final List<NetworkAgentInfo> matchingNetworks = new ArrayList<>();

9255

synchronized (mNetworkForNetId) {

9256

for (int i = 0; i < mNetworkForNetId.size(); i++) {

9257

final NetworkAgentInfo nai = mNetworkForNetId.valueAt(i);

9258

// Connectivity Diagnostics rejects multilayer requests at registration hence get(0)

9259

if (nai.satisfies(nri.mRequests.get(0))) {

9260

matchingNetworks.add(nai);

}

}

}

for (final NetworkAgentInfo nai : matchingNetworks) {

9265

final ConnectivityReport report = nai.getConnectivityReport();

9266

if (report == null) {

9267

continue;

9268

}

9269

if (!checkConnectivityDiagnosticsPermissions(

9270

nri.mPid, nri.mUid, nai, cbInfo.mCallingPackageName)) {

continue;

}

try {

cb.onConnectivityReportAvailable(report);

9276

} catch (RemoteException e) {

9277

// Exception while sending the ConnectivityReport. Move on to the next network.

}

}

}

private void handleUnregisterConnectivityDiagnosticsCallback(

9283

@NonNull IConnectivityDiagnosticsCallback cb, int uid) {

9284

ensureRunningOnConnectivityServiceThread();

9285

final IBinder iCb = cb.asBinder();

9286

9287

final ConnectivityDiagnosticsCallbackInfo cbInfo =

9288

mConnectivityDiagnosticsCallbacks.remove(iCb);

9289

if (cbInfo == null) {

9290

if (VDBG) log("Removing diagnostics callback that is not currently registered");

return;

}

final NetworkRequestInfo nri = cbInfo.mRequestInfo;

9295

9296

// Caller's UID must either be the registrants (if they are unregistering) or the System's

9297

// (if the Binder died)

9298

if (uid != nri.mUid && uid != Process.SYSTEM_UID) {

9299

if (DBG) loge("Uid(" + uid + ") not registrant's (" + nri.mUid + ") or System's");

return;

}

// Decrement the reference count for this NetworkRequestInfo. The reference count is

9304

// incremented when the NetworkRequestInfo is created as part of

9305

// enforceRequestCountLimit().

9306

nri.decrementRequestCount();

9307

9308

iCb.unlinkToDeath(cbInfo, 0);

9309

}

9310

9311

private void handleNetworkTestedWithExtras(

9312

@NonNull ConnectivityReportEvent reportEvent, @NonNull PersistableBundle extras) {

9313

final NetworkAgentInfo nai = reportEvent.mNai;

9314

final NetworkCapabilities networkCapabilities =

9315

getNetworkCapabilitiesWithoutUids(nai.networkCapabilities);

9316

final ConnectivityReport report =

9317

new ConnectivityReport(

9318

reportEvent.mNai.network,

9319

reportEvent.mTimestampMillis,

nai.linkProperties,

networkCapabilities,

extras);

nai.setConnectivityReport(report);

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9324

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9325

final List<IConnectivityDiagnosticsCallback> results =

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9326

getMatchingPermissionedCallbacks(nai, Process.INVALID_UID);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9327

for (final IConnectivityDiagnosticsCallback cb : results) {

9328

try {

9329

cb.onConnectivityReportAvailable(report);

9330

} catch (RemoteException ex) {

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9331

loge("Error invoking onConnectivityReportAvailable", ex);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

}

private void handleDataStallSuspected(

9337

@NonNull NetworkAgentInfo nai, long timestampMillis, int detectionMethod,

9338

@NonNull PersistableBundle extras) {

9339

final NetworkCapabilities networkCapabilities =

9340

getNetworkCapabilitiesWithoutUids(nai.networkCapabilities);

9341

final DataStallReport report =

new DataStallReport(

nai.network,

timestampMillis,

detectionMethod,

nai.linkProperties,

networkCapabilities,

extras);

final List<IConnectivityDiagnosticsCallback> results =

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9350

getMatchingPermissionedCallbacks(nai, Process.INVALID_UID);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9351

for (final IConnectivityDiagnosticsCallback cb : results) {

9352

try {

9353

cb.onDataStallSuspected(report);

9354

} catch (RemoteException ex) {

9355

loge("Error invoking onDataStallSuspected", ex);

}

}

}

private void handleNetworkConnectivityReported(

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9361

@NonNull ReportedNetworkConnectivityInfo reportedNetworkConnectivityInfo) {

9362

final NetworkAgentInfo nai = reportedNetworkConnectivityInfo.nai;

9363

final ConnectivityReport cachedReport = nai.getConnectivityReport();

9364

9365

// If the Network is being re-validated as a result of this call to

9366

// reportNetworkConnectivity(), notify all permissioned callbacks. Otherwise, only notify

9367

// permissioned callbacks registered by the reporter.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9368

final List<IConnectivityDiagnosticsCallback> results =

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9369

getMatchingPermissionedCallbacks(

9370

nai,

9371

reportedNetworkConnectivityInfo.isNetworkRevalidating

9372

? Process.INVALID_UID

9373

: reportedNetworkConnectivityInfo.reporterUid);

9374

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9375

for (final IConnectivityDiagnosticsCallback cb : results) {

9376

try {

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9377

cb.onNetworkConnectivityReported(

9378

nai.network, reportedNetworkConnectivityInfo.hasConnectivity);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9379

} catch (RemoteException ex) {

9380

loge("Error invoking onNetworkConnectivityReported", ex);

9381

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9382

9383

// If the Network isn't re-validating, also provide the cached report. If there is no

9384

// cached report, the Network is still being validated and a report will be sent once

9385

// validation is complete. Note that networks which never undergo validation will still

9386

// have a cached ConnectivityReport with RESULT_SKIPPED.

9387

if (!reportedNetworkConnectivityInfo.isNetworkRevalidating && cachedReport != null) {

9388

try {

9389

cb.onConnectivityReportAvailable(cachedReport);

9390

} catch (RemoteException ex) {

9391

loge("Error invoking onConnectivityReportAvailable", ex);

9392

}

9393

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

private NetworkCapabilities getNetworkCapabilitiesWithoutUids(@NonNull NetworkCapabilities nc) {

9398

final NetworkCapabilities sanitized = new NetworkCapabilities(nc,

9399

NetworkCapabilities.REDACT_ALL);

9400

sanitized.setUids(null);

9401

sanitized.setAdministratorUids(new int[0]);

9402

sanitized.setOwnerUid(Process.INVALID_UID);

return sanitized;

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9406

/**

9407

* Gets a list of ConnectivityDiagnostics callbacks that match the specified Network and uid.

9408

*

9409

* If Process.INVALID_UID is specified, all matching callbacks will be returned.

9410

*/

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9411

private List<IConnectivityDiagnosticsCallback> getMatchingPermissionedCallbacks(

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9412

@NonNull NetworkAgentInfo nai, int uid) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9413

final List<IConnectivityDiagnosticsCallback> results = new ArrayList<>();

9414

for (Entry<IBinder, ConnectivityDiagnosticsCallbackInfo> entry :

9415

mConnectivityDiagnosticsCallbacks.entrySet()) {

9416

final ConnectivityDiagnosticsCallbackInfo cbInfo = entry.getValue();

9417

final NetworkRequestInfo nri = cbInfo.mRequestInfo;

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9418

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9419

// Connectivity Diagnostics rejects multilayer requests at registration hence get(0).

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9420

if (!nai.satisfies(nri.mRequests.get(0))) {

9421

continue;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9422

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9423

9424

// UID for this callback must either be:

9425

// - INVALID_UID (which sends callbacks to all UIDs), or

9426

// - The callback's owner (the owner called reportNetworkConnectivity() and is being

9427

// notified as a result)

9428

if (uid != Process.INVALID_UID && uid != nri.mUid) {

continue;

}

if (!checkConnectivityDiagnosticsPermissions(

9433

nri.mPid, nri.mUid, nai, cbInfo.mCallingPackageName)) {

continue;

}

results.add(entry.getValue().mCb);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

return results;

}

Cody Kesting

2021-05-11 14:22:40 -0700

[diff] [blame]

9442

private boolean isLocationPermissionRequiredForConnectivityDiagnostics(

9443

@NonNull NetworkAgentInfo nai) {

9444

// TODO(b/188483916): replace with a transport-agnostic location-aware check

9445

return nai.networkCapabilities.hasTransport(TRANSPORT_WIFI);

9446

}

9447

Cody Kesting

0b4be02

2021-05-20 22:57:07 +0000

[diff] [blame]

9448

private boolean hasLocationPermission(String packageName, int uid) {

9449

// LocationPermissionChecker#checkLocationPermission can throw SecurityException if the uid

9450

// and package name don't match. Throwing on the CS thread is not acceptable, so wrap the

9451

// call in a try-catch.

9452

try {

9453

if (!mLocationPermissionChecker.checkLocationPermission(

9454

packageName, null /* featureId */, uid, null /* message */)) {

9455

return false;

9456

}

9457

} catch (SecurityException e) {

return false;

}

return true;

}

private boolean ownsVpnRunningOverNetwork(int uid, Network network) {

9465

for (NetworkAgentInfo virtual : mNetworkAgentInfos) {

Lorenzo Colitti

2021-07-02 11:47:57 +0900

[diff] [blame]

9466

if (virtual.propagateUnderlyingCapabilities()

Cody Kesting

0b4be02

2021-05-20 22:57:07 +0000

[diff] [blame]

9467

&& virtual.networkCapabilities.getOwnerUid() == uid

9468

&& CollectionUtils.contains(virtual.declaredUnderlyingNetworks, network)) {

return true;

}

}

return false;

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9476

@VisibleForTesting

9477

boolean checkConnectivityDiagnosticsPermissions(

9478

int callbackPid, int callbackUid, NetworkAgentInfo nai, String callbackPackageName) {

9479

if (checkNetworkStackPermission(callbackPid, callbackUid)) {

return true;

}

Cody Kesting

2021-05-20 22:57:07 +0000

[diff] [blame]

9483

// Administrator UIDs also contains the Owner UID

9484

final int[] administratorUids = nai.networkCapabilities.getAdministratorUids();

9485

if (!CollectionUtils.contains(administratorUids, callbackUid)

9486

&& !ownsVpnRunningOverNetwork(callbackUid, nai.network)) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

return false;

}

Cody Kesting

2021-05-11 14:22:40 -0700

[diff] [blame]

9490

return !isLocationPermissionRequiredForConnectivityDiagnostics(nai)

9491

|| hasLocationPermission(callbackPackageName, callbackUid);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

@Override

public void registerConnectivityDiagnosticsCallback(

9496

@NonNull IConnectivityDiagnosticsCallback callback,

9497

@NonNull NetworkRequest request,

9498

@NonNull String callingPackageName) {

9499

if (request.legacyType != TYPE_NONE) {

9500

throw new IllegalArgumentException("ConnectivityManager.TYPE_* are deprecated."

9501

+ " Please use NetworkCapabilities instead.");

9502

}

9503

final int callingUid = mDeps.getCallingUid();

9504

mAppOpsManager.checkPackage(callingUid, callingPackageName);

9505

9506

// This NetworkCapabilities is only used for matching to Networks. Clear out its owner uid

9507

// and administrator uids to be safe.

9508

final NetworkCapabilities nc = new NetworkCapabilities(request.networkCapabilities);

9509

restrictRequestUidsForCallerAndSetRequestorInfo(nc, callingUid, callingPackageName);

9510

9511

final NetworkRequest requestWithId =

9512

new NetworkRequest(

9513

nc, TYPE_NONE, nextNetworkRequestId(), NetworkRequest.Type.LISTEN);

9514

9515

// NetworkRequestInfos created here count towards MAX_NETWORK_REQUESTS_PER_UID limit.

9516

//

9517

// nri is not bound to the death of callback. Instead, callback.bindToDeath() is set in

9518

// handleRegisterConnectivityDiagnosticsCallback(). nri will be cleaned up as part of the

9519

// callback's binder death.

9520

final NetworkRequestInfo nri = new NetworkRequestInfo(callingUid, requestWithId);

9521

final ConnectivityDiagnosticsCallbackInfo cbInfo =

9522

new ConnectivityDiagnosticsCallbackInfo(callback, nri, callingPackageName);

9523

9524

mConnectivityDiagnosticsHandler.sendMessage(

9525

mConnectivityDiagnosticsHandler.obtainMessage(

9526

ConnectivityDiagnosticsHandler

9527

.EVENT_REGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK,

cbInfo));

}

@Override

public void unregisterConnectivityDiagnosticsCallback(

9533

@NonNull IConnectivityDiagnosticsCallback callback) {

9534

Objects.requireNonNull(callback, "callback must be non-null");

9535

mConnectivityDiagnosticsHandler.sendMessage(

9536

mConnectivityDiagnosticsHandler.obtainMessage(

9537

ConnectivityDiagnosticsHandler

9538

.EVENT_UNREGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK,

9539

mDeps.getCallingUid(),

0,

callback));

}

@Override

public void simulateDataStall(int detectionMethod, long timestampMillis,

9546

@NonNull Network network, @NonNull PersistableBundle extras) {

9547

enforceAnyPermissionOf(android.Manifest.permission.MANAGE_TEST_NETWORKS,

9548

android.Manifest.permission.NETWORK_STACK);

9549

final NetworkCapabilities nc = getNetworkCapabilitiesInternal(network);

9550

if (!nc.hasTransport(TRANSPORT_TEST)) {

9551

throw new SecurityException("Data Stall simluation is only possible for test networks");

9552

}

9553

9554

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

9555

if (nai == null || nai.creatorUid != mDeps.getCallingUid()) {

9556

throw new SecurityException("Data Stall simulation is only possible for network "

+ "creators");

}

// Instead of passing the data stall directly to the ConnectivityDiagnostics handler, treat

9561

// this as a Data Stall received directly from NetworkMonitor. This requires wrapping the

9562

// Data Stall information as a DataStallReportParcelable and passing to

9563

// #notifyDataStallSuspected. This ensures that unknown Data Stall detection methods are

9564

// still passed to ConnectivityDiagnostics (with new detection methods masked).

9565

final DataStallReportParcelable p = new DataStallReportParcelable();

9566

p.timestampMillis = timestampMillis;

9567

p.detectionMethod = detectionMethod;

9568

9569

if (hasDataStallDetectionMethod(p, DETECTION_METHOD_DNS_EVENTS)) {

9570

p.dnsConsecutiveTimeouts = extras.getInt(KEY_DNS_CONSECUTIVE_TIMEOUTS);

9571

}

9572

if (hasDataStallDetectionMethod(p, DETECTION_METHOD_TCP_METRICS)) {

9573

p.tcpPacketFailRate = extras.getInt(KEY_TCP_PACKET_FAIL_RATE);

9574

p.tcpMetricsCollectionPeriodMillis = extras.getInt(

9575

KEY_TCP_METRICS_COLLECTION_PERIOD_MILLIS);

9576

}

9577

9578

notifyDataStallSuspected(p, network.getNetId());

9579

}

9580

9581

private class NetdCallback extends BaseNetdUnsolicitedEventListener {

9582

@Override

9583

public void onInterfaceClassActivityChanged(boolean isActive, int transportType,

9584

long timestampNs, int uid) {

9585

mNetworkActivityTracker.setAndReportNetworkActive(isActive, transportType, timestampNs);

}

@Override

public void onInterfaceLinkStateChanged(String iface, boolean up) {

9590

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

9591

nai.clatd.interfaceLinkStateChanged(iface, up);

}

}

@Override

public void onInterfaceRemoved(String iface) {

9597

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

9598

nai.clatd.interfaceRemoved(iface);

}

}

}

private final LegacyNetworkActivityTracker mNetworkActivityTracker;

9604

9605

/**

9606

* Class used for updating network activity tracking with netd and notify network activity

9607

* changes.

9608

*/

9609

private static final class LegacyNetworkActivityTracker {

9610

private static final int NO_UID = -1;

9611

private final Context mContext;

9612

private final INetd mNetd;

9613

private final RemoteCallbackList<INetworkActivityListener> mNetworkActivityListeners =

9614

new RemoteCallbackList<>();

9615

// Indicate the current system default network activity is active or not.

9616

@GuardedBy("mActiveIdleTimers")

9617

private boolean mNetworkActive;

9618

@GuardedBy("mActiveIdleTimers")

9619

private final ArrayMap<String, IdleTimerParams> mActiveIdleTimers = new ArrayMap();

9620

private final Handler mHandler;

9621

9622

private class IdleTimerParams {

9623

public final int timeout;

9624

public final int transportType;

9625

9626

IdleTimerParams(int timeout, int transport) {

9627

this.timeout = timeout;

9628

this.transportType = transport;

}

}

LegacyNetworkActivityTracker(@NonNull Context context, @NonNull Handler handler,

9633

@NonNull INetd netd) {

mContext = context;

mNetd = netd;

mHandler = handler;

}

public void setAndReportNetworkActive(boolean active, int transportType, long tsNanos) {

9640

sendDataActivityBroadcast(transportTypeToLegacyType(transportType), active, tsNanos);

9641

synchronized (mActiveIdleTimers) {

9642

mNetworkActive = active;

9643

// If there are no idle timers, it means that system is not monitoring

9644

// activity, so the system default network for those default network

9645

// unspecified apps is always considered active.

9646

//

9647

// TODO: If the mActiveIdleTimers is empty, netd will actually not send

9648

// any network activity change event. Whenever this event is received,

9649

// the mActiveIdleTimers should be always not empty. The legacy behavior

9650

// is no-op. Remove to refer to mNetworkActive only.

9651

if (mNetworkActive || mActiveIdleTimers.isEmpty()) {

9652

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REPORT_NETWORK_ACTIVITY));

}

}

}

// The network activity should only be updated from ConnectivityService handler thread

9658

// when mActiveIdleTimers lock is held.

9659

@GuardedBy("mActiveIdleTimers")

9660

private void reportNetworkActive() {

9661

final int length = mNetworkActivityListeners.beginBroadcast();

9662

if (DDBG) log("reportNetworkActive, notify " + length + " listeners");

9663

try {

9664

for (int i = 0; i < length; i++) {

9665

try {

9666

mNetworkActivityListeners.getBroadcastItem(i).onNetworkActive();

9667

} catch (RemoteException | RuntimeException e) {

9668

loge("Fail to send network activie to listener " + e);

}

}

} finally {

mNetworkActivityListeners.finishBroadcast();

}

}

@GuardedBy("mActiveIdleTimers")

9677

public void handleReportNetworkActivity() {

9678

synchronized (mActiveIdleTimers) {

9679

reportNetworkActive();

}

}

// This is deprecated and only to support legacy use cases.

9684

private int transportTypeToLegacyType(int type) {

9685

switch (type) {

9686

case NetworkCapabilities.TRANSPORT_CELLULAR:

9687

return TYPE_MOBILE;

9688

case NetworkCapabilities.TRANSPORT_WIFI:

9689

return TYPE_WIFI;

9690

case NetworkCapabilities.TRANSPORT_BLUETOOTH:

9691

return TYPE_BLUETOOTH;

9692

case NetworkCapabilities.TRANSPORT_ETHERNET:

9693

return TYPE_ETHERNET;

9694

default:

9695

loge("Unexpected transport in transportTypeToLegacyType: " + type);

9696

}

9697

return ConnectivityManager.TYPE_NONE;

9698

}

9699

9700

public void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) {

9701

final Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE);

9702

intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType);

9703

intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active);

9704

intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos);

9705

final long ident = Binder.clearCallingIdentity();

9706

try {

9707

mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL,

9708

RECEIVE_DATA_ACTIVITY_CHANGE,

9709

null /* resultReceiver */,

9710

null /* scheduler */,

9711

0 /* initialCode */,

9712

null /* initialData */,

9713

null /* initialExtra */);

9714

} finally {

9715

Binder.restoreCallingIdentity(ident);

}

}

/**

* Setup data activity tracking for the given network.

9721

*

9722

* Every {@code setupDataActivityTracking} should be paired with a

9723

* {@link #removeDataActivityTracking} for cleanup.

9724

*/

9725

private void setupDataActivityTracking(NetworkAgentInfo networkAgent) {

9726

final String iface = networkAgent.linkProperties.getInterfaceName();

final int timeout;

final int type;

if (networkAgent.networkCapabilities.hasTransport(

9732

NetworkCapabilities.TRANSPORT_CELLULAR)) {

9733

timeout = Settings.Global.getInt(mContext.getContentResolver(),

9734

ConnectivitySettingsManager.DATA_ACTIVITY_TIMEOUT_MOBILE,

9735

10);

9736

type = NetworkCapabilities.TRANSPORT_CELLULAR;

9737

} else if (networkAgent.networkCapabilities.hasTransport(

9738

NetworkCapabilities.TRANSPORT_WIFI)) {

9739

timeout = Settings.Global.getInt(mContext.getContentResolver(),

9740

ConnectivitySettingsManager.DATA_ACTIVITY_TIMEOUT_WIFI,

9741

15);

9742

type = NetworkCapabilities.TRANSPORT_WIFI;

9743

} else {

9744

return; // do not track any other networks

9745

}

9746

9747

updateRadioPowerState(true /* isActive */, type);

9748

9749

if (timeout > 0 && iface != null) {

9750

try {

9751

synchronized (mActiveIdleTimers) {

9752

// Networks start up.

9753

mNetworkActive = true;

9754

mActiveIdleTimers.put(iface, new IdleTimerParams(timeout, type));

9755

mNetd.idletimerAddInterface(iface, timeout, Integer.toString(type));

9756

reportNetworkActive();

9757

}

9758

} catch (Exception e) {

9759

// You shall not crash!

9760

loge("Exception in setupDataActivityTracking " + e);

}

}

}

/**

* Remove data activity tracking when network disconnects.

9767

*/

9768

private void removeDataActivityTracking(NetworkAgentInfo networkAgent) {

9769

final String iface = networkAgent.linkProperties.getInterfaceName();

9770

final NetworkCapabilities caps = networkAgent.networkCapabilities;

9771

9772

if (iface == null) return;

9773

9774

final int type;

9775

if (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {

9776

type = NetworkCapabilities.TRANSPORT_CELLULAR;

9777

} else if (caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {

9778

type = NetworkCapabilities.TRANSPORT_WIFI;

9779

} else {

9780

return; // do not track any other networks

}

try {

updateRadioPowerState(false /* isActive */, type);

9785

synchronized (mActiveIdleTimers) {

9786

final IdleTimerParams params = mActiveIdleTimers.remove(iface);

9787

// The call fails silently if no idle timer setup for this interface

9788

mNetd.idletimerRemoveInterface(iface, params.timeout,

9789

Integer.toString(params.transportType));

9790

}

9791

} catch (Exception e) {

9792

// You shall not crash!

9793

loge("Exception in removeDataActivityTracking " + e);

}

}

/**

* Update data activity tracking when network state is updated.

9799

*/

9800

public void updateDataActivityTracking(NetworkAgentInfo newNetwork,

9801

NetworkAgentInfo oldNetwork) {

9802

if (newNetwork != null) {

9803

setupDataActivityTracking(newNetwork);

9804

}

9805

if (oldNetwork != null) {

9806

removeDataActivityTracking(oldNetwork);

}

}

private void updateRadioPowerState(boolean isActive, int transportType) {

9811

final BatteryStatsManager bs = mContext.getSystemService(BatteryStatsManager.class);

9812

switch (transportType) {

9813

case NetworkCapabilities.TRANSPORT_CELLULAR:

9814

bs.reportMobileRadioPowerState(isActive, NO_UID);

9815

break;

9816

case NetworkCapabilities.TRANSPORT_WIFI:

9817

bs.reportWifiRadioPowerState(isActive, NO_UID);

9818

break;

9819

default:

9820

logw("Untracked transport type:" + transportType);

}

}

public boolean isDefaultNetworkActive() {

9825

synchronized (mActiveIdleTimers) {

9826

// If there are no idle timers, it means that system is not monitoring activity,

9827

// so the default network is always considered active.

9828

//

9829

// TODO : Distinguish between the cases where mActiveIdleTimers is empty because

9830

// tracking is disabled (negative idle timer value configured), or no active default

9831

// network. In the latter case, this reports active but it should report inactive.

9832

return mNetworkActive || mActiveIdleTimers.isEmpty();

}

}

public void registerNetworkActivityListener(@NonNull INetworkActivityListener l) {

9837

mNetworkActivityListeners.register(l);

9838

}

9839

9840

public void unregisterNetworkActivityListener(@NonNull INetworkActivityListener l) {

9841

mNetworkActivityListeners.unregister(l);

9842

}

9843

9844

public void dump(IndentingPrintWriter pw) {

9845

synchronized (mActiveIdleTimers) {

9846

pw.print("mNetworkActive="); pw.println(mNetworkActive);

9847

pw.println("Idle timers:");

9848

for (HashMap.Entry<String, IdleTimerParams> ent : mActiveIdleTimers.entrySet()) {

9849

pw.print(" "); pw.print(ent.getKey()); pw.println(":");

9850

final IdleTimerParams params = ent.getValue();

9851

pw.print(" timeout="); pw.print(params.timeout);

9852

pw.print(" type="); pw.println(params.transportType);

}

}

}

}

/**

* Registers {@link QosSocketFilter} with {@link IQosCallback}.

9860

*

9861

* @param socketInfo the socket information

9862

* @param callback the callback to register

9863

*/

9864

@Override

9865

public void registerQosSocketCallback(@NonNull final QosSocketInfo socketInfo,

9866

@NonNull final IQosCallback callback) {

9867

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(socketInfo.getNetwork());

9868

if (nai == null || nai.networkCapabilities == null) {

9869

try {

9870

callback.onError(QosCallbackException.EX_TYPE_FILTER_NETWORK_RELEASED);

9871

} catch (final RemoteException ex) {

9872

loge("registerQosCallbackInternal: RemoteException", ex);

}

return;

}

registerQosCallbackInternal(new QosSocketFilter(socketInfo), callback, nai);

}

/**

* Register a {@link IQosCallback} with base {@link QosFilter}.

9881

*

9882

* @param filter the filter to register

9883

* @param callback the callback to register

9884

* @param nai the agent information related to the filter's network

9885

*/

9886

@VisibleForTesting

9887

public void registerQosCallbackInternal(@NonNull final QosFilter filter,

9888

@NonNull final IQosCallback callback, @NonNull final NetworkAgentInfo nai) {

9889

if (filter == null) throw new IllegalArgumentException("filter must be non-null");

9890

if (callback == null) throw new IllegalArgumentException("callback must be non-null");

9891

9892

if (!nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) {

9893

enforceConnectivityRestrictedNetworksPermission();

9894

}

9895

mQosCallbackTracker.registerCallback(callback, filter, nai);

}

/**

* Unregisters the given callback.

9900

*

9901

* @param callback the callback to unregister

9902

*/

9903

@Override

9904

public void unregisterQosCallback(@NonNull final IQosCallback callback) {

9905

Objects.requireNonNull(callback, "callback must be non-null");

9906

mQosCallbackTracker.unregisterCallback(callback);

9907

}

9908

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9909

/**

9910

* Request that a user profile is put by default on a network matching a given preference.

9911

*

9912

* See the documentation for the individual preferences for a description of the supported

9913

* behaviors.

9914

*

9915

* @param profile the profile concerned.

9916

* @param preference the preference for this profile, as one of the PROFILE_NETWORK_PREFERENCE_*

9917

* constants.

9918

* @param listener an optional listener to listen for completion of the operation.

9919

*/

9920

@Override

9921

public void setProfileNetworkPreference(@NonNull final UserHandle profile,

9922

@ConnectivityManager.ProfileNetworkPreference final int preference,

9923

@Nullable final IOnCompleteListener listener) {

9924

Objects.requireNonNull(profile);

9925

PermissionUtils.enforceNetworkStackPermission(mContext);

9926

if (DBG) {

9927

log("setProfileNetworkPreference " + profile + " to " + preference);

9928

}

9929

if (profile.getIdentifier() < 0) {

9930

throw new IllegalArgumentException("Must explicitly specify a user handle ("

9931

+ "UserHandle.CURRENT not supported)");

9932

}

9933

final UserManager um = mContext.getSystemService(UserManager.class);

9934

if (!um.isManagedProfile(profile.getIdentifier())) {

9935

throw new IllegalArgumentException("Profile must be a managed profile");

9936

}

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

9937

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9938

final NetworkCapabilities nc;

9939

switch (preference) {

9940

case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_DEFAULT:

9941

nc = null;

9942

break;

9943

case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE:

9944

final UidRange uids = UidRange.createForUser(profile);

9945

nc = createDefaultNetworkCapabilitiesForUidRange(uids);

9946

nc.addCapability(NET_CAPABILITY_ENTERPRISE);

9947

nc.removeCapability(NET_CAPABILITY_NOT_RESTRICTED);

9948

break;

9949

default:

9950

throw new IllegalArgumentException(

9951

"Invalid preference in setProfileNetworkPreference");

9952

}

9953

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_PROFILE_NETWORK_PREFERENCE,

9954

new Pair<>(new ProfileNetworkPreferences.Preference(profile, nc), listener)));

9955

}

9956

9957

private void validateNetworkCapabilitiesOfProfileNetworkPreference(

9958

@Nullable final NetworkCapabilities nc) {

9959

if (null == nc) return; // Null caps are always allowed. It means to remove the setting.

9960

ensureRequestableCapabilities(nc);

9961

}

9962

9963

private ArraySet<NetworkRequestInfo> createNrisFromProfileNetworkPreferences(

9964

@NonNull final ProfileNetworkPreferences prefs) {

9965

final ArraySet<NetworkRequestInfo> result = new ArraySet<>();

9966

for (final ProfileNetworkPreferences.Preference pref : prefs.preferences) {

9967

// The NRI for a user should be comprised of two layers:

9968

// - The request for the capabilities

9969

// - The request for the default network, for fallback. Create an image of it to

9970

// have the correct UIDs in it (also a request can only be part of one NRI, because

9971

// of lookups in 1:1 associations like mNetworkRequests).

9972

// Note that denying a fallback can be implemented simply by not adding the second

9973

// request.

9974

final ArrayList<NetworkRequest> nrs = new ArrayList<>();

9975

nrs.add(createNetworkRequest(NetworkRequest.Type.REQUEST, pref.capabilities));

9976

nrs.add(createDefaultInternetRequestForTransport(

9977

TYPE_NONE, NetworkRequest.Type.TRACK_DEFAULT));

9978

setNetworkRequestUids(nrs, UidRange.fromIntRanges(pref.capabilities.getUids()));

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

9979

final NetworkRequestInfo nri = new NetworkRequestInfo(Process.myUid(), nrs,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

9980

PREFERENCE_ORDER_PROFILE);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

result.add(nri);

}

return result;

}

private void handleSetProfileNetworkPreference(

9987

@NonNull final ProfileNetworkPreferences.Preference preference,

9988

@Nullable final IOnCompleteListener listener) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9989

validateNetworkCapabilitiesOfProfileNetworkPreference(preference.capabilities);

9990

9991

mProfileNetworkPreferences = mProfileNetworkPreferences.plus(preference);

9992

mSystemNetworkRequestCounter.transact(

9993

mDeps.getCallingUid(), mProfileNetworkPreferences.preferences.size(),

9994

() -> {

9995

final ArraySet<NetworkRequestInfo> nris =

9996

createNrisFromProfileNetworkPreferences(mProfileNetworkPreferences);

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

9997

replaceDefaultNetworkRequestsForPreference(nris, PREFERENCE_ORDER_PROFILE);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9998

});

9999

// Finally, rematch.

10000

rematchAllNetworksAndRequests();

10001

10002

if (null != listener) {

10003

try {

10004

listener.onComplete();

10005

} catch (RemoteException e) {

10006

loge("Listener for setProfileNetworkPreference has died");

}

}

}

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

10011

@VisibleForTesting

10012

@NonNull

10013

ArraySet<NetworkRequestInfo> createNrisFromMobileDataPreferredUids(

10014

@NonNull final Set<Integer> uids) {

10015

final ArraySet<NetworkRequestInfo> nris = new ArraySet<>();

10016

if (uids.size() == 0) {

10017

// Should not create NetworkRequestInfo if no preferences. Without uid range in

10018

// NetworkRequestInfo, makeDefaultForApps() would treat it as a illegal NRI.

10019

if (DBG) log("Don't create NetworkRequestInfo because no preferences");

return nris;

}

final List<NetworkRequest> requests = new ArrayList<>();

10024

// The NRI should be comprised of two layers:

10025

// - The request for the mobile network preferred.

10026

// - The request for the default network, for fallback.

10027

requests.add(createDefaultInternetRequestForTransport(

Ansik

605e770

2021-06-29 19:06:37 +0900

[diff] [blame]

10028

TRANSPORT_CELLULAR, NetworkRequest.Type.REQUEST));

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

10029

requests.add(createDefaultInternetRequestForTransport(

10030

TYPE_NONE, NetworkRequest.Type.TRACK_DEFAULT));

10031

final Set<UidRange> ranges = new ArraySet<>();

10032

for (final int uid : uids) {

10033

ranges.add(new UidRange(uid, uid));

10034

}

10035

setNetworkRequestUids(requests, ranges);

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

10036

nris.add(new NetworkRequestInfo(Process.myUid(), requests,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10037

PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED));

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

return nris;

}

private void handleMobileDataPreferredUidsChanged() {

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

10042

mMobileDataPreferredUids = ConnectivitySettingsManager.getMobileDataPreferredUids(mContext);

10043

mSystemNetworkRequestCounter.transact(

10044

mDeps.getCallingUid(), 1 /* numOfNewRequests */,

10045

() -> {

10046

final ArraySet<NetworkRequestInfo> nris =

10047

createNrisFromMobileDataPreferredUids(mMobileDataPreferredUids);

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

10048

replaceDefaultNetworkRequestsForPreference(nris,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10049

PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED);

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

10050

});

10051

// Finally, rematch.

10052

rematchAllNetworksAndRequests();

10053

}

10054

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10055

private void enforceAutomotiveDevice() {

10056

final boolean isAutomotiveDevice =

10057

mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE);

10058

if (!isAutomotiveDevice) {

10059

throw new UnsupportedOperationException(

10060

"setOemNetworkPreference() is only available on automotive devices.");

}

}

/**

* Used by automotive devices to set the network preferences used to direct traffic at an

10066

* application level as per the given OemNetworkPreferences. An example use-case would be an

10067

* automotive OEM wanting to provide connectivity for applications critical to the usage of a

10068

* vehicle via a particular network.

10069

*

10070

* Calling this will overwrite the existing preference.

10071

*

10072

* @param preference {@link OemNetworkPreferences} The application network preference to be set.

10073

* @param listener {@link ConnectivityManager.OnCompleteListener} Listener used

10074

* to communicate completion of setOemNetworkPreference();

10075

*/

10076

@Override

10077

public void setOemNetworkPreference(

10078

@NonNull final OemNetworkPreferences preference,

10079

@Nullable final IOnCompleteListener listener) {

10080

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10081

Objects.requireNonNull(preference, "OemNetworkPreferences must be non-null");

10082

// Only bypass the permission/device checks if this is a valid test request.

10083

if (isValidTestOemNetworkPreference(preference)) {

10084

enforceManageTestNetworksPermission();

10085

} else {

10086

enforceAutomotiveDevice();

10087

enforceOemNetworkPreferencesPermission();

10088

validateOemNetworkPreferences(preference);

10089

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10090

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10091

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_OEM_NETWORK_PREFERENCE,

10092

new Pair<>(preference, listener)));

10093

}

10094

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10095

/**

10096

* Check the validity of an OEM network preference to be used for testing purposes.

10097

* @param preference the preference to validate

10098

* @return true if this is a valid OEM network preference test request.

10099

*/

10100

private boolean isValidTestOemNetworkPreference(

10101

@NonNull final OemNetworkPreferences preference) {

10102

// Allow for clearing of an existing OemNetworkPreference used for testing.

10103

// This isn't called on the handler thread so it is possible that mOemNetworkPreferences

10104

// changes after this check is complete. This is an unlikely scenario as calling of this API

10105

// is controlled by the OEM therefore the added complexity is not worth adding given those

10106

// circumstances. That said, it is an edge case to be aware of hence this comment.

10107

final boolean isValidTestClearPref = preference.getNetworkPreferences().size() == 0

10108

&& isTestOemNetworkPreference(mOemNetworkPreferences);

10109

return isTestOemNetworkPreference(preference) || isValidTestClearPref;

10110

}

10111

10112

private boolean isTestOemNetworkPreference(@NonNull final OemNetworkPreferences preference) {

10113

final Map<String, Integer> prefMap = preference.getNetworkPreferences();

10114

return prefMap.size() == 1

10115

&& (prefMap.containsValue(OEM_NETWORK_PREFERENCE_TEST)

10116

|| prefMap.containsValue(OEM_NETWORK_PREFERENCE_TEST_ONLY));

10117

}

10118

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10119

private void validateOemNetworkPreferences(@NonNull OemNetworkPreferences preference) {

10120

for (@OemNetworkPreferences.OemNetworkPreference final int pref

10121

: preference.getNetworkPreferences().values()) {

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10122

if (pref <= 0 || OemNetworkPreferences.OEM_NETWORK_PREFERENCE_MAX < pref) {

10123

throw new IllegalArgumentException(

10124

OemNetworkPreferences.oemNetworkPreferenceToString(pref)

10125

+ " is an invalid value.");

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

}

private void handleSetOemNetworkPreference(

10131

@NonNull final OemNetworkPreferences preference,

10132

@Nullable final IOnCompleteListener listener) {

10133

Objects.requireNonNull(preference, "OemNetworkPreferences must be non-null");

10134

if (DBG) {

10135

log("set OEM network preferences :" + preference.toString());

10136

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10137

10138

mOemNetworkPreferencesLogs.log("UPDATE INITIATED: " + preference);

10139

final int uniquePreferenceCount = new ArraySet<>(

10140

preference.getNetworkPreferences().values()).size();

10141

mSystemNetworkRequestCounter.transact(

10142

mDeps.getCallingUid(), uniquePreferenceCount,

10143

() -> {

10144

final ArraySet<NetworkRequestInfo> nris =

10145

new OemNetworkRequestFactory()

10146

.createNrisFromOemNetworkPreferences(preference);

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10147

replaceDefaultNetworkRequestsForPreference(nris, PREFERENCE_ORDER_OEM);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10148

});

10149

mOemNetworkPreferences = preference;

10150

10151

if (null != listener) {

10152

try {

10153

listener.onComplete();

10154

} catch (RemoteException e) {

10155

loge("Can't send onComplete in handleSetOemNetworkPreference", e);

}

}

}

private void replaceDefaultNetworkRequestsForPreference(

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10161

@NonNull final Set<NetworkRequestInfo> nris, final int preferenceOrder) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

10162

// Skip the requests which are set by other network preference. Because the uid range rules

10163

// should stay in netd.

10164

final Set<NetworkRequestInfo> requests = new ArraySet<>(mDefaultNetworkRequests);

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10165

requests.removeIf(request -> request.mPreferenceOrder != preferenceOrder);

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

10166

handleRemoveNetworkRequests(requests);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10167

addPerAppDefaultNetworkRequests(nris);

10168

}

10169

10170

private void addPerAppDefaultNetworkRequests(@NonNull final Set<NetworkRequestInfo> nris) {

10171

ensureRunningOnConnectivityServiceThread();

10172

mDefaultNetworkRequests.addAll(nris);

10173

final ArraySet<NetworkRequestInfo> perAppCallbackRequestsToUpdate =

10174

getPerAppCallbackRequestsToUpdate();

10175

final ArraySet<NetworkRequestInfo> nrisToRegister = new ArraySet<>(nris);

10176

mSystemNetworkRequestCounter.transact(

10177

mDeps.getCallingUid(), perAppCallbackRequestsToUpdate.size(),

10178

() -> {

10179

nrisToRegister.addAll(

10180

createPerAppCallbackRequestsToRegister(perAppCallbackRequestsToUpdate));

10181

handleRemoveNetworkRequests(perAppCallbackRequestsToUpdate);

10182

handleRegisterNetworkRequests(nrisToRegister);

});

}

/**

* All current requests that are tracking the default network need to be assessed as to whether

10188

* or not the current set of per-application default requests will be changing their default

10189

* network. If so, those requests will need to be updated so that they will send callbacks for

10190

* default network changes at the appropriate time. Additionally, those requests tracking the

10191

* default that were previously updated by this flow will need to be reassessed.

10192

* @return the nris which will need to be updated.

10193

*/

10194

private ArraySet<NetworkRequestInfo> getPerAppCallbackRequestsToUpdate() {

10195

final ArraySet<NetworkRequestInfo> defaultCallbackRequests = new ArraySet<>();

10196

// Get the distinct nris to check since for multilayer requests, it is possible to have the

10197

// same nri in the map's values for each of its NetworkRequest objects.

10198

final ArraySet<NetworkRequestInfo> nris = new ArraySet<>(mNetworkRequests.values());

10199

for (final NetworkRequestInfo nri : nris) {

10200

// Include this nri if it is currently being tracked.

10201

if (isPerAppTrackedNri(nri)) {

10202

defaultCallbackRequests.add(nri);

10203

continue;

10204

}

10205

// We only track callbacks for requests tracking the default.

10206

if (NetworkRequest.Type.TRACK_DEFAULT != nri.mRequests.get(0).type) {

10207

continue;

10208

}

10209

// Include this nri if it will be tracked by the new per-app default requests.

10210

final boolean isNriGoingToBeTracked =

10211

getDefaultRequestTrackingUid(nri.mAsUid) != mDefaultRequest;

10212

if (isNriGoingToBeTracked) {

10213

defaultCallbackRequests.add(nri);

10214

}

10215

}

10216

return defaultCallbackRequests;

}

/**

* Create nris for those network requests that are currently tracking the default network that

10221

* are being controlled by a per-application default.

10222

* @param perAppCallbackRequestsForUpdate the baseline network requests to be used as the

10223

* foundation when creating the nri. Important items include the calling uid's original

10224

* NetworkRequest to be used when mapping callbacks as well as the caller's uid and name. These

10225

* requests are assumed to have already been validated as needing to be updated.

10226

* @return the Set of nris to use when registering network requests.

10227

*/

10228

private ArraySet<NetworkRequestInfo> createPerAppCallbackRequestsToRegister(

10229

@NonNull final ArraySet<NetworkRequestInfo> perAppCallbackRequestsForUpdate) {

10230

final ArraySet<NetworkRequestInfo> callbackRequestsToRegister = new ArraySet<>();

10231

for (final NetworkRequestInfo callbackRequest : perAppCallbackRequestsForUpdate) {

10232

final NetworkRequestInfo trackingNri =

10233

getDefaultRequestTrackingUid(callbackRequest.mAsUid);

10234

10235

// If this nri is not being tracked, the change it back to an untracked nri.

10236

if (trackingNri == mDefaultRequest) {

10237

callbackRequestsToRegister.add(new NetworkRequestInfo(

10238

callbackRequest,

10239

Collections.singletonList(callbackRequest.getNetworkRequestForCallback())));

continue;

}

final NetworkRequest request = callbackRequest.mRequests.get(0);

10244

callbackRequestsToRegister.add(new NetworkRequestInfo(

10245

callbackRequest,

10246

copyNetworkRequestsForUid(

10247

trackingNri.mRequests, callbackRequest.mAsUid,

10248

callbackRequest.mUid, request.getRequestorPackageName())));

10249

}

10250

return callbackRequestsToRegister;

10251

}

10252

10253

private static void setNetworkRequestUids(@NonNull final List<NetworkRequest> requests,

10254

@NonNull final Set<UidRange> uids) {

10255

for (final NetworkRequest req : requests) {

10256

req.networkCapabilities.setUids(UidRange.toIntRanges(uids));

}

}

/**

* Class used to generate {@link NetworkRequestInfo} based off of {@link OemNetworkPreferences}.

10262

*/

10263

@VisibleForTesting

10264

final class OemNetworkRequestFactory {

10265

ArraySet<NetworkRequestInfo> createNrisFromOemNetworkPreferences(

10266

@NonNull final OemNetworkPreferences preference) {

10267

final ArraySet<NetworkRequestInfo> nris = new ArraySet<>();

10268

final SparseArray<Set<Integer>> uids =

10269

createUidsFromOemNetworkPreferences(preference);

10270

for (int i = 0; i < uids.size(); i++) {

10271

final int key = uids.keyAt(i);

10272

final Set<Integer> value = uids.valueAt(i);

10273

final NetworkRequestInfo nri = createNriFromOemNetworkPreferences(key, value);

10274

// No need to add an nri without any requests.

10275

if (0 == nri.mRequests.size()) {

continue;

}

nris.add(nri);

}

return nris;

}

private SparseArray<Set<Integer>> createUidsFromOemNetworkPreferences(

10285

@NonNull final OemNetworkPreferences preference) {

James Mattis

2021-06-01 22:30:36 -0700

[diff] [blame]

10286

final SparseArray<Set<Integer>> prefToUids = new SparseArray<>();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10287

final PackageManager pm = mContext.getPackageManager();

10288

final List<UserHandle> users =

10289

mContext.getSystemService(UserManager.class).getUserHandles(true);

10290

if (null == users || users.size() == 0) {

10291

if (VDBG || DDBG) {

10292

log("No users currently available for setting the OEM network preference.");

10293

}

James Mattis

2021-06-01 22:30:36 -0700

[diff] [blame]

10294

return prefToUids;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10295

}

10296

for (final Map.Entry<String, Integer> entry :

10297

preference.getNetworkPreferences().entrySet()) {

10298

@OemNetworkPreferences.OemNetworkPreference final int pref = entry.getValue();

James Mattis

2021-06-01 22:30:36 -0700

[diff] [blame]

10299

// Add the rules for all users as this policy is device wide.

10300

for (final UserHandle user : users) {

10301

try {

10302

final int uid = pm.getApplicationInfoAsUser(entry.getKey(), 0, user).uid;

10303

if (!prefToUids.contains(pref)) {

10304

prefToUids.put(pref, new ArraySet<>());

10305

}

10306

prefToUids.get(pref).add(uid);

10307

} catch (PackageManager.NameNotFoundException e) {

10308

// Although this may seem like an error scenario, it is ok that uninstalled

10309

// packages are sent on a network preference as the system will watch for

10310

// package installations associated with this network preference and update

10311

// accordingly. This is done to minimize race conditions on app install.

10312

continue;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10313

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10314

}

10315

}

James Mattis

2021-06-01 22:30:36 -0700

[diff] [blame]

10316

return prefToUids;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10317

}

10318

10319

private NetworkRequestInfo createNriFromOemNetworkPreferences(

10320

@OemNetworkPreferences.OemNetworkPreference final int preference,

10321

@NonNull final Set<Integer> uids) {

10322

final List<NetworkRequest> requests = new ArrayList<>();

10323

// Requests will ultimately be evaluated by order of insertion therefore it matters.

10324

switch (preference) {

10325

case OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PAID:

10326

requests.add(createUnmeteredNetworkRequest());

10327

requests.add(createOemPaidNetworkRequest());

10328

requests.add(createDefaultInternetRequestForTransport(

10329

TYPE_NONE, NetworkRequest.Type.TRACK_DEFAULT));

10330

break;

10331

case OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PAID_NO_FALLBACK:

10332

requests.add(createUnmeteredNetworkRequest());

10333

requests.add(createOemPaidNetworkRequest());

10334

break;

10335

case OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PAID_ONLY:

10336

requests.add(createOemPaidNetworkRequest());

10337

break;

10338

case OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PRIVATE_ONLY:

10339

requests.add(createOemPrivateNetworkRequest());

10340

break;

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10341

case OEM_NETWORK_PREFERENCE_TEST:

10342

requests.add(createUnmeteredNetworkRequest());

10343

requests.add(createTestNetworkRequest());

10344

requests.add(createDefaultRequest());

10345

break;

10346

case OEM_NETWORK_PREFERENCE_TEST_ONLY:

10347

requests.add(createTestNetworkRequest());

10348

break;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10349

default:

10350

// This should never happen.

10351

throw new IllegalArgumentException("createNriFromOemNetworkPreferences()"

10352

+ " called with invalid preference of " + preference);

10353

}

10354

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10355

final ArraySet<UidRange> ranges = new ArraySet<>();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10356

for (final int uid : uids) {

10357

ranges.add(new UidRange(uid, uid));

10358

}

10359

setNetworkRequestUids(requests, ranges);

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10360

return new NetworkRequestInfo(Process.myUid(), requests, PREFERENCE_ORDER_OEM);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10361

}

10362

10363

private NetworkRequest createUnmeteredNetworkRequest() {

10364

final NetworkCapabilities netcap = createDefaultPerAppNetCap()

10365

.addCapability(NET_CAPABILITY_NOT_METERED)

10366

.addCapability(NET_CAPABILITY_VALIDATED);

10367

return createNetworkRequest(NetworkRequest.Type.LISTEN, netcap);

10368

}

10369

10370

private NetworkRequest createOemPaidNetworkRequest() {

10371

// NET_CAPABILITY_OEM_PAID is a restricted capability.

10372

final NetworkCapabilities netcap = createDefaultPerAppNetCap()

10373

.addCapability(NET_CAPABILITY_OEM_PAID)

10374

.removeCapability(NET_CAPABILITY_NOT_RESTRICTED);

10375

return createNetworkRequest(NetworkRequest.Type.REQUEST, netcap);

10376

}

10377

10378

private NetworkRequest createOemPrivateNetworkRequest() {

10379

// NET_CAPABILITY_OEM_PRIVATE is a restricted capability.

10380

final NetworkCapabilities netcap = createDefaultPerAppNetCap()

10381

.addCapability(NET_CAPABILITY_OEM_PRIVATE)

10382

.removeCapability(NET_CAPABILITY_NOT_RESTRICTED);

10383

return createNetworkRequest(NetworkRequest.Type.REQUEST, netcap);

10384

}

10385

10386

private NetworkCapabilities createDefaultPerAppNetCap() {

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10387

final NetworkCapabilities netcap = new NetworkCapabilities();

10388

netcap.addCapability(NET_CAPABILITY_INTERNET);

10389

netcap.setRequestorUidAndPackageName(Process.myUid(), mContext.getPackageName());

return netcap;

}

private NetworkRequest createTestNetworkRequest() {

10394

final NetworkCapabilities netcap = new NetworkCapabilities();

10395

netcap.clearAll();

10396

netcap.addTransportType(TRANSPORT_TEST);

10397

return createNetworkRequest(NetworkRequest.Type.REQUEST, netcap);

Remi NGUYEN VAN