1 // 2 // Copyright (C) 2012 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #ifndef SHILL_CELLULAR_CELLULAR_H_ 18 #define SHILL_CELLULAR_CELLULAR_H_ 19 20 #include <map> 21 #include <memory> 22 #include <string> 23 #include <vector> 24 25 #include <base/macros.h> 26 #include <base/memory/weak_ptr.h> 27 #include <gtest/gtest_prod.h> // for FRIEND_TEST 28 29 #include "shill/cellular/mobile_operator_info.h" 30 #include "shill/cellular/modem_info.h" 31 #include "shill/cellular/modem_proxy_interface.h" 32 #include "shill/device.h" 33 #include "shill/event_dispatcher.h" 34 #include "shill/metrics.h" 35 #include "shill/refptr_types.h" 36 #include "shill/rpc_task.h" 37 38 namespace shill { 39 40 class CellularCapability; 41 class Error; 42 class ExternalTask; 43 class MobileOperatorInfo; 44 class PPPDeviceFactory; 45 class ProcessManager; 46 47 class Cellular : public Device, public RPCTaskDelegate { 48 public: 49 enum Type { 50 kTypeGSM, 51 kTypeCDMA, 52 kTypeUniversal, // ModemManager1 53 kTypeUniversalCDMA, 54 kTypeInvalid, 55 }; 56 57 // The device states progress linearly from Disabled to Linked. 58 enum State { 59 // This is the initial state of the modem and indicates that the modem radio 60 // is not turned on. 61 kStateDisabled, 62 // This state indicates that the modem radio is turned on, and it should be 63 // possible to measure signal strength. 64 kStateEnabled, 65 // The modem has registered with a network and has signal quality 66 // measurements. A cellular service object is created. 67 kStateRegistered, 68 // The modem has connected to a network. 69 kStateConnected, 70 // The network interface is UP. 71 kStateLinked, 72 }; 73 74 // This enum must be kept in sync with ModemManager's MMModemState enum. 75 enum ModemState { 76 kModemStateFailed = -1, 77 kModemStateUnknown = 0, 78 kModemStateInitializing = 1, 79 kModemStateLocked = 2, 80 kModemStateDisabled = 3, 81 kModemStateDisabling = 4, 82 kModemStateEnabling = 5, 83 kModemStateEnabled = 6, 84 kModemStateSearching = 7, 85 kModemStateRegistered = 8, 86 kModemStateDisconnecting = 9, 87 kModemStateConnecting = 10, 88 kModemStateConnected = 11, 89 }; 90 91 // |path| is the ModemManager.Modem DBus object path (e.g., 92 // "/org/chromium/ModemManager/Gobi/0"). 93 // |service| is the modem mananager service name (e.g., 94 // /org/chromium/ModemManager or /org/freedesktop/ModemManager1). 95 Cellular(ModemInfo* modem_info, 96 const std::string& link_name, 97 const std::string& address, 98 int interface_index, 99 Type type, 100 const std::string& service, 101 const std::string& path); 102 ~Cellular() override; 103 104 // Load configuration for the device from |storage|. 105 bool Load(StoreInterface* storage) override; 106 107 // Save configuration for the device to |storage|. 108 bool Save(StoreInterface* storage) override; 109 110 // Asynchronously connects the modem to the network. Populates |error| on 111 // failure, leaves it unchanged otherwise. 112 virtual void Connect(Error* error); 113 114 // Asynchronously disconnects the modem from the network and populates 115 // |error| on failure, leaves it unchanged otherwise. 116 virtual void Disconnect(Error* error, const char* reason); 117 118 // Asynchronously activates the modem. Returns an error on failure. 119 void Activate(const std::string& carrier, Error* error, 120 const ResultCallback& callback); 121 122 // Performs the necessary steps to bring the service to the activated state, 123 // once an online payment has been done. 124 void CompleteActivation(Error* error); 125 126 const CellularServiceRefPtr& service() const { return service_; } 127 MobileOperatorInfo* home_provider_info() const { 128 return home_provider_info_.get(); 129 } 130 MobileOperatorInfo* serving_operator_info() const { 131 return serving_operator_info_.get(); 132 } 133 134 // Deregisters and destructs the current service and destroys the connection, 135 // if any. This also eliminates the circular references between this device 136 // and the associated service, allowing eventual device destruction. 137 virtual void DestroyService(); 138 139 static std::string GetStateString(State state); 140 static std::string GetModemStateString(ModemState modem_state); 141 142 std::string CreateDefaultFriendlyServiceName(); 143 bool IsDefaultFriendlyServiceName(const std::string& service_name) const; 144 145 // Update the home provider from the information in |operator_info|. This 146 // information may be from the SIM / received OTA. 147 void UpdateHomeProvider(const MobileOperatorInfo* operator_info); 148 // Update the serving operator using information in |operator_info|. 149 // Additionally, if |home_provider_info| is not nullptr, use it to come up 150 // with a better name. 151 void UpdateServingOperator(const MobileOperatorInfo* operator_info, 152 const MobileOperatorInfo* home_provider_info); 153 154 State state() const { return state_; } 155 156 void set_modem_state(ModemState state) { modem_state_ = state; } 157 ModemState modem_state() const { return modem_state_; } 158 bool IsUnderlyingDeviceEnabled() const override; 159 bool IsModemRegistered() const; 160 static bool IsEnabledModemState(ModemState state); 161 162 void HandleNewSignalQuality(uint32_t strength); 163 164 // Processes a change in the modem registration state, possibly creating, 165 // destroying or updating the CellularService. 166 void HandleNewRegistrationState(); 167 168 virtual void OnPropertiesChanged( 169 const std::string& interface, 170 const KeyValueStore& changed_properties, 171 const std::vector<std::string>& invalidated_properties); 172 173 // Inherited from Device. 174 void Start(Error* error, 175 const EnabledStateChangedCallback& callback) override; 176 void Stop(Error* error, const EnabledStateChangedCallback& callback) override; 177 void LinkEvent(unsigned int flags, unsigned int change) override; 178 void Scan(ScanType /*scan_type*/, Error* error, 179 const std::string& /*reason*/) override; 180 void RegisterOnNetwork(const std::string& network_id, 181 Error* error, 182 const ResultCallback& callback) override; 183 void RequirePIN(const std::string& pin, bool require, 184 Error* error, const ResultCallback& callback) override; 185 void EnterPIN(const std::string& pin, 186 Error* error, const ResultCallback& callback) override; 187 void UnblockPIN(const std::string& unblock_code, 188 const std::string& pin, 189 Error* error, const ResultCallback& callback) override; 190 void ChangePIN(const std::string& old_pin, 191 const std::string& new_pin, 192 Error* error, const ResultCallback& callback) override; 193 void Reset(Error* error, const ResultCallback& callback) override; 194 void SetCarrier(const std::string& carrier, 195 Error* error, const ResultCallback& callback) override; 196 bool IsIPv6Allowed() const override; 197 void DropConnection() override; 198 void SetServiceState(Service::ConnectState state) override; 199 void SetServiceFailure(Service::ConnectFailure failure_state) override; 200 void SetServiceFailureSilent(Service::ConnectFailure failure_state) override; 201 void OnBeforeSuspend(const ResultCallback& callback) override; 202 void OnAfterResume() override; 203 204 void StartModemCallback(const EnabledStateChangedCallback& callback, 205 const Error& error); 206 void StopModemCallback(const EnabledStateChangedCallback& callback, 207 const Error& error); 208 void OnDisabled(); 209 void OnEnabled(); 210 void OnConnecting(); 211 void OnConnected() override; 212 void OnConnectFailed(const Error& error); 213 void OnDisconnected(); 214 void OnDisconnectFailed(); 215 std::string GetTechnologyFamily(Error* error); 216 void OnModemStateChanged(ModemState new_state); 217 void OnScanReply(const Stringmaps& found_networks, const Error& error); 218 219 // accessor to read the allow roaming property 220 bool allow_roaming_property() const { return allow_roaming_; } 221 // Is the underlying device in the process of activating? 222 bool IsActivating() const; 223 224 // Initiate PPP link. Called from capabilities. 225 virtual void StartPPP(const std::string& serial_device); 226 // Callback for |ppp_task_|. 227 virtual void OnPPPDied(pid_t pid, int exit); 228 // Implements RPCTaskDelegate, for |ppp_task_|. 229 void GetLogin(std::string* user, std::string* password) override; 230 void Notify(const std::string& reason, 231 const std::map<std::string, std::string>& dict) override; 232 233 // /////////////////////////////////////////////////////////////////////////// 234 // DBus Properties exposed by the Device interface of shill. 235 void RegisterProperties(); 236 237 // getters 238 const std::string& dbus_service() const { return dbus_service_; } 239 const std::string& dbus_path() const { return dbus_path_; } 240 const Stringmap& home_provider() const { return home_provider_; } 241 const std::string& carrier() const { return carrier_; } 242 bool scanning_supported() const { return scanning_supported_; } 243 const std::string& esn() const { return esn_; } 244 const std::string& firmware_revision() const { return firmware_revision_; } 245 const std::string& hardware_revision() const { return hardware_revision_; } 246 const std::string& imei() const { return imei_; } 247 const std::string& imsi() const { return imsi_; } 248 const std::string& mdn() const { return mdn_; } 249 const std::string& meid() const { return meid_; } 250 const std::string& min() const { return min_; } 251 const std::string& manufacturer() const { return manufacturer_; } 252 const std::string& model_id() const { return model_id_; } 253 const std::string& mm_plugin() const { return mm_plugin_; } 254 bool scanning() const { return scanning_; } 255 256 const std::string& selected_network() const { return selected_network_; } 257 const Stringmaps& found_networks() const { return found_networks_; } 258 bool provider_requires_roaming() const { return provider_requires_roaming_; } 259 bool sim_present() const { return sim_present_; } 260 const Stringmaps& apn_list() const { return apn_list_; } 261 const std::string& sim_identifier() const { return sim_identifier_; } 262 263 const Strings& supported_carriers() const { return supported_carriers_; } 264 uint16_t prl_version() const { return prl_version_; } 265 266 // setters 267 void set_home_provider(const Stringmap& home_provider); 268 void set_carrier(const std::string& carrier); 269 void set_scanning_supported(bool scanning_supported); 270 void set_esn(const std::string& esn); 271 void set_firmware_revision(const std::string& firmware_revision); 272 void set_hardware_revision(const std::string& hardware_revision); 273 void set_imei(const std::string& imei); 274 void set_imsi(const std::string& imsi); 275 void set_mdn(const std::string& mdn); 276 void set_meid(const std::string& meid); 277 void set_min(const std::string& min); 278 void set_manufacturer(const std::string& manufacturer); 279 void set_model_id(const std::string& model_id); 280 void set_mm_plugin(const std::string& mm_plugin); 281 void set_scanning(bool scanning); 282 283 void set_selected_network(const std::string& selected_network); 284 void clear_found_networks(); 285 void set_found_networks(const Stringmaps& found_networks); 286 void set_provider_requires_roaming(bool provider_requires_roaming); 287 void set_sim_present(bool sim_present); 288 void set_apn_list(const Stringmaps& apn_list); 289 void set_sim_identifier(const std::string& sim_identifier); 290 291 void set_supported_carriers(const Strings& supported_carriers); 292 void set_prl_version(uint16_t prl_version); 293 294 // Takes ownership. 295 void set_home_provider_info(MobileOperatorInfo* home_provider_info); 296 // Takes ownership. 297 void set_serving_operator_info(MobileOperatorInfo* serving_operator_info); 298 299 private: 300 friend class ActivePassiveOutOfCreditsDetectorTest; 301 friend class CellularTest; 302 friend class CellularCapabilityTest; 303 friend class CellularCapabilityCDMATest; 304 friend class CellularCapabilityGSMTest; 305 friend class CellularCapabilityUniversalTest; 306 friend class CellularCapabilityUniversalCDMATest; 307 friend class CellularServiceTest; 308 friend class ModemTest; 309 friend class SubscriptionStateOutOfCreditsDetectorTest; 310 FRIEND_TEST(CellularCapabilityCDMATest, GetRegistrationState); 311 FRIEND_TEST(CellularCapabilityGSMTest, AllowRoaming); 312 FRIEND_TEST(CellularCapabilityTest, AllowRoaming); 313 FRIEND_TEST(CellularCapabilityTest, EnableModemFail); 314 FRIEND_TEST(CellularCapabilityTest, EnableModemSucceed); 315 FRIEND_TEST(CellularCapabilityTest, FinishEnable); 316 FRIEND_TEST(CellularCapabilityTest, GetModemInfo); 317 FRIEND_TEST(CellularCapabilityTest, GetModemStatus); 318 FRIEND_TEST(CellularCapabilityUniversalCDMATest, OnCDMARegistrationChanged); 319 FRIEND_TEST(CellularCapabilityUniversalMainTest, AllowRoaming); 320 FRIEND_TEST(CellularCapabilityUniversalMainTest, Connect); 321 FRIEND_TEST(CellularCapabilityUniversalMainTest, IsServiceActivationRequired); 322 FRIEND_TEST(CellularCapabilityUniversalMainTest, StartModemAlreadyEnabled); 323 FRIEND_TEST(CellularCapabilityUniversalMainTest, StopModemConnected); 324 FRIEND_TEST(CellularCapabilityUniversalMainTest, 325 UpdatePendingActivationState); 326 FRIEND_TEST(CellularCapabilityUniversalMainTest, 327 UpdateRegistrationState); 328 FRIEND_TEST(CellularCapabilityUniversalMainTest, 329 UpdateRegistrationStateModemNotConnected); 330 FRIEND_TEST(CellularCapabilityUniversalMainTest, UpdateScanningProperty); 331 FRIEND_TEST(CellularCapabilityUniversalMainTest, 332 UpdateServiceActivationState); 333 FRIEND_TEST(CellularTest, ChangeServiceState); 334 FRIEND_TEST(CellularTest, ChangeServiceStatePPP); 335 FRIEND_TEST(CellularTest, CreateService); 336 FRIEND_TEST(CellularTest, Connect); 337 FRIEND_TEST(CellularTest, ConnectFailure); 338 FRIEND_TEST(CellularTest, ConnectFailureNoService); 339 FRIEND_TEST(CellularTest, ConnectSuccessNoService); 340 FRIEND_TEST(CellularTest, CustomSetterNoopChange); 341 FRIEND_TEST(CellularTest, DisableModem); 342 FRIEND_TEST(CellularTest, Disconnect); 343 FRIEND_TEST(CellularTest, DisconnectFailure); 344 FRIEND_TEST(CellularTest, DisconnectWithCallback); 345 FRIEND_TEST(CellularTest, DropConnection); 346 FRIEND_TEST(CellularTest, DropConnectionPPP); 347 FRIEND_TEST(CellularTest, EnableTrafficMonitor); 348 FRIEND_TEST(CellularTest, EstablishLinkDHCP); 349 FRIEND_TEST(CellularTest, EstablishLinkPPP); 350 FRIEND_TEST(CellularTest, EstablishLinkStatic); 351 FRIEND_TEST(CellularTest, FriendlyServiceName); 352 FRIEND_TEST(CellularTest, 353 HandleNewRegistrationStateForServiceRequiringActivation); 354 FRIEND_TEST(CellularTest, HomeProviderServingOperator); 355 FRIEND_TEST(CellularTest, LinkEventUpWithPPP); 356 FRIEND_TEST(CellularTest, LinkEventUpWithoutPPP); 357 FRIEND_TEST(CellularTest, LinkEventWontDestroyService); 358 FRIEND_TEST(CellularTest, ModemStateChangeDisable); 359 FRIEND_TEST(CellularTest, ModemStateChangeEnable); 360 FRIEND_TEST(CellularTest, ModemStateChangeStaleConnected); 361 FRIEND_TEST(CellularTest, ModemStateChangeValidConnected); 362 FRIEND_TEST(CellularTest, Notify); 363 FRIEND_TEST(CellularTest, OnAfterResumeDisableInProgressWantDisabled); 364 FRIEND_TEST(CellularTest, OnAfterResumeDisableQueuedWantEnabled); 365 FRIEND_TEST(CellularTest, OnAfterResumeDisabledWantDisabled); 366 FRIEND_TEST(CellularTest, OnAfterResumeDisabledWantEnabled); 367 FRIEND_TEST(CellularTest, OnAfterResumePowerDownInProgressWantEnabled); 368 FRIEND_TEST(CellularTest, OnConnectionHealthCheckerResult); 369 FRIEND_TEST(CellularTest, OnPPPDied); 370 FRIEND_TEST(CellularTest, PPPConnectionFailedAfterAuth); 371 FRIEND_TEST(CellularTest, PPPConnectionFailedBeforeAuth); 372 FRIEND_TEST(CellularTest, PPPConnectionFailedDuringAuth); 373 FRIEND_TEST(CellularTest, ScanAsynchronousFailure); 374 FRIEND_TEST(CellularTest, ScanImmediateFailure); 375 FRIEND_TEST(CellularTest, ScanSuccess); 376 FRIEND_TEST(CellularTest, SetAllowRoaming); 377 FRIEND_TEST(CellularTest, StartModemCallback); 378 FRIEND_TEST(CellularTest, StartModemCallbackFail); 379 FRIEND_TEST(CellularTest, StopModemCallback); 380 FRIEND_TEST(CellularTest, StopModemCallbackFail); 381 FRIEND_TEST(CellularTest, StopPPPOnDisconnect); 382 FRIEND_TEST(CellularTest, StopPPPOnTermination); 383 FRIEND_TEST(CellularTest, StorageIdentifier); 384 FRIEND_TEST(CellularTest, StartConnected); 385 FRIEND_TEST(CellularTest, StartCDMARegister); 386 FRIEND_TEST(CellularTest, StartGSMRegister); 387 FRIEND_TEST(CellularTest, StartLinked); 388 FRIEND_TEST(CellularTest, StartPPP); 389 FRIEND_TEST(CellularTest, StartPPPAfterEthernetUp); 390 FRIEND_TEST(CellularTest, StartPPPAlreadyStarted); 391 FRIEND_TEST(CellularTest, UpdateScanning); 392 FRIEND_TEST(Modem1Test, CreateDeviceMM1); 393 394 class MobileOperatorInfoObserver : public MobileOperatorInfo::Observer { 395 public: 396 // |cellular| must have lifespan longer than this object. In practice this 397 // is enforced because |cellular| owns this object. 398 explicit MobileOperatorInfoObserver(Cellular* cellular); 399 ~MobileOperatorInfoObserver() override; 400 401 void set_capability(CellularCapability* capability) { 402 capability_ = capability; 403 } 404 405 // Inherited from MobileOperatorInfo::Observer 406 void OnOperatorChanged() override; 407 408 private: 409 Cellular* const cellular_; 410 // Owned by |Cellular|. 411 CellularCapability* capability_; 412 413 DISALLOW_COPY_AND_ASSIGN(MobileOperatorInfoObserver); 414 }; 415 416 // Names of properties in storage 417 static const char kAllowRoaming[]; 418 419 // the |kScanningProperty| exposed by Cellular device is sticky false. Every 420 // time it is set to true, it must be reset to false after a time equal to 421 // this constant. 422 static const int64_t kDefaultScanningTimeoutMilliseconds; 423 424 // Generic service name prefix, shown when the correct carrier name is 425 // unknown. 426 static const char kGenericServiceNamePrefix[]; 427 static unsigned int friendly_service_name_id_; 428 429 void SetState(State state); 430 431 // Invoked when the modem is connected to the cellular network to transition 432 // to the network-connected state and bring the network interface up. 433 void EstablishLink(); 434 435 void InitCapability(Type type); 436 437 void CreateService(); 438 439 // HelpRegisterDerived*: Expose a property over RPC, with the name |name|. 440 // 441 // Reads of the property will be handled by invoking |get|. 442 // Writes to the property will be handled by invoking |set|. 443 // Clearing the property will be handled by PropertyStore. 444 void HelpRegisterDerivedBool( 445 const std::string& name, 446 bool(Cellular::*get)(Error* error), 447 bool(Cellular::*set)(const bool& value, Error* error)); 448 void HelpRegisterConstDerivedString( 449 const std::string& name, 450 std::string(Cellular::*get)(Error* error)); 451 452 void OnConnectReply(const Error& error); 453 void OnDisconnectReply(const Error& error); 454 455 // DBUS accessors to read/modify the allow roaming property 456 bool GetAllowRoaming(Error* /*error*/) { return allow_roaming_; } 457 bool SetAllowRoaming(const bool& value, Error* error); 458 459 // When shill terminates or ChromeOS suspends, this function is called to 460 // disconnect from the cellular network. 461 void StartTermination(); 462 463 // This method is invoked upon the completion of StartTermination(). 464 void OnTerminationCompleted(const Error& error); 465 466 // This function does the final cleanup once a disconnect request terminates. 467 // Returns true, if the device state is successfully changed. 468 bool DisconnectCleanup(); 469 470 // Executed after the asynchronous CellularCapability::StartModem 471 // call from OnAfterResume completes. 472 static void LogRestartModemResult(const Error& error); 473 474 // Terminate the pppd process associated with this Device, and remove the 475 // association between the PPPDevice and our CellularService. If this 476 // Device is not using PPP, the method has no effect. 477 void StopPPP(); 478 479 // Handlers for PPP events. Dispatched from Notify(). 480 void OnPPPAuthenticated(); 481 void OnPPPAuthenticating(); 482 void OnPPPConnected(const std::map<std::string, std::string>& params); 483 void OnPPPDisconnected(); 484 485 void UpdateScanning(); 486 487 base::WeakPtrFactory<Cellular> weak_ptr_factory_; 488 489 State state_; 490 ModemState modem_state_; 491 492 std::unique_ptr<CellularCapability> capability_; 493 494 // Operator info objects. These objects receive updates as we receive 495 // information about the network operators from the SIM or OTA. In turn, they 496 // send out updates through their observer interfaces whenever the identity of 497 // the network operator changes, or any other property of the operator 498 // changes. 499 std::unique_ptr<MobileOperatorInfo> home_provider_info_; 500 std::unique_ptr<MobileOperatorInfo> serving_operator_info_; 501 // Observer object to listen to updates from the operator info objects. 502 std::unique_ptr<MobileOperatorInfoObserver> mobile_operator_info_observer_; 503 504 // /////////////////////////////////////////////////////////////////////////// 505 // All DBus Properties exposed by the Cellular device. 506 // Properties common to GSM and CDMA modems. 507 const std::string dbus_service_; // org.*.ModemManager* 508 const std::string dbus_path_; // ModemManager.Modem 509 Stringmap home_provider_; 510 511 bool scanning_supported_; 512 std::string carrier_; 513 std::string esn_; 514 std::string firmware_revision_; 515 std::string hardware_revision_; 516 std::string imei_; 517 std::string imsi_; 518 std::string manufacturer_; 519 std::string mdn_; 520 std::string meid_; 521 std::string min_; 522 std::string model_id_; 523 std::string mm_plugin_; 524 bool scanning_; 525 526 // GSM only properties. 527 // They are always exposed but are non empty only for GSM technology modems. 528 std::string selected_network_; 529 Stringmaps found_networks_; 530 bool provider_requires_roaming_; 531 uint16_t scan_interval_; 532 bool sim_present_; 533 Stringmaps apn_list_; 534 std::string sim_identifier_; 535 536 // CDMA only properties. 537 uint16_t prl_version_; 538 539 // This property is specific to Gobi modems. 540 Strings supported_carriers_; 541 // End of DBus properties. 542 // /////////////////////////////////////////////////////////////////////////// 543 544 ModemInfo* modem_info_; 545 const Type type_; 546 PPPDeviceFactory* ppp_device_factory_; 547 548 ProcessManager* process_manager_; 549 550 CellularServiceRefPtr service_; 551 552 // User preference to allow or disallow roaming 553 bool allow_roaming_; 554 555 // Track whether a user initiated scan is in prgoress (initiated via ::Scan) 556 bool proposed_scan_in_progress_; 557 558 // Flag indicating that a disconnect has been explicitly requested. 559 bool explicit_disconnect_; 560 561 std::unique_ptr<ExternalTask> ppp_task_; 562 PPPDeviceRefPtr ppp_device_; 563 bool is_ppp_authenticating_; 564 565 // Sometimes modems may be stuck in the SEARCHING state during the lack of 566 // presence of a network. During this indefinite duration of time, keeping 567 // the Device.Scanning property as |true| causes a bad user experience. 568 // This callback sets it to |false| after a timeout period has passed. 569 base::CancelableClosure scanning_timeout_callback_; 570 int64_t scanning_timeout_milliseconds_; 571 572 DISALLOW_COPY_AND_ASSIGN(Cellular); 573 }; 574 575 } // namespace shill 576 577 #endif // SHILL_CELLULAR_CELLULAR_H_ 578
