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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/browser/policy/device_status_collector.h" | |
| 6 | |
| 7 #include <limits> | |
| 8 | |
| 9 #include "base/bind.h" | |
| 10 #include "base/bind_helpers.h" | |
| 11 #include "base/location.h" | |
| 12 #include "base/logging.h" | |
| 13 #include "base/memory/scoped_ptr.h" | |
| 14 #include "base/prefs/pref_registry_simple.h" | |
| 15 #include "base/prefs/pref_service.h" | |
| 16 #include "base/strings/string_number_conversions.h" | |
| 17 #include "base/values.h" | |
| 18 #include "chrome/browser/chromeos/settings/cros_settings.h" | |
| 19 #include "chrome/browser/chromeos/settings/cros_settings_names.h" | |
| 20 #include "chrome/browser/chromeos/system/statistics_provider.h" | |
| 21 #include "chrome/browser/policy/proto/device_management_backend.pb.h" | |
| 22 #include "chrome/browser/prefs/scoped_user_pref_update.h" | |
| 23 #include "chrome/common/chrome_notification_types.h" | |
| 24 #include "chrome/common/chrome_version_info.h" | |
| 25 #include "chrome/common/pref_names.h" | |
| 26 #include "content/public/browser/notification_details.h" | |
| 27 #include "content/public/browser/notification_source.h" | |
| 28 | |
| 29 using base::Time; | |
| 30 using base::TimeDelta; | |
| 31 using chromeos::VersionLoader; | |
| 32 | |
| 33 namespace em = enterprise_management; | |
| 34 | |
| 35 namespace { | |
| 36 // How many seconds of inactivity triggers the idle state. | |
| 37 const int kIdleStateThresholdSeconds = 300; | |
| 38 | |
| 39 // How many days in the past to store active periods for. | |
| 40 const unsigned int kMaxStoredPastActivityDays = 30; | |
| 41 | |
| 42 // How many days in the future to store active periods for. | |
| 43 const unsigned int kMaxStoredFutureActivityDays = 2; | |
| 44 | |
| 45 // How often, in seconds, to update the device location. | |
| 46 const unsigned int kGeolocationPollIntervalSeconds = 30 * 60; | |
| 47 | |
| 48 const int64 kMillisecondsPerDay = Time::kMicrosecondsPerDay / 1000; | |
| 49 | |
| 50 const char kLatitude[] = "latitude"; | |
| 51 | |
| 52 const char kLongitude[] = "longitude"; | |
| 53 | |
| 54 const char kAltitude[] = "altitude"; | |
| 55 | |
| 56 const char kAccuracy[] = "accuracy"; | |
| 57 | |
| 58 const char kAltitudeAccuracy[] = "altitude_accuracy"; | |
| 59 | |
| 60 const char kHeading[] = "heading"; | |
| 61 | |
| 62 const char kSpeed[] = "speed"; | |
| 63 | |
| 64 const char kTimestamp[] = "timestamp"; | |
| 65 | |
| 66 // Determine the day key (milliseconds since epoch for corresponding day in UTC) | |
| 67 // for a given |timestamp|. | |
| 68 int64 TimestampToDayKey(Time timestamp) { | |
| 69 Time::Exploded exploded; | |
| 70 timestamp.LocalMidnight().LocalExplode(&exploded); | |
| 71 return (Time::FromUTCExploded(exploded) - Time::UnixEpoch()).InMilliseconds(); | |
| 72 } | |
| 73 | |
| 74 } // namespace | |
| 75 | |
| 76 namespace policy { | |
| 77 | |
| 78 DeviceStatusCollector::DeviceStatusCollector( | |
| 79 PrefService* local_state, | |
| 80 chromeos::system::StatisticsProvider* provider, | |
| 81 LocationUpdateRequester location_update_requester) | |
| 82 : max_stored_past_activity_days_(kMaxStoredPastActivityDays), | |
| 83 max_stored_future_activity_days_(kMaxStoredFutureActivityDays), | |
| 84 local_state_(local_state), | |
| 85 last_idle_check_(Time()), | |
| 86 last_reported_day_(0), | |
| 87 duration_for_last_reported_day_(0), | |
| 88 geolocation_update_in_progress_(false), | |
| 89 statistics_provider_(provider), | |
| 90 ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)), | |
| 91 location_update_requester_(location_update_requester), | |
| 92 report_version_info_(false), | |
| 93 report_activity_times_(false), | |
| 94 report_boot_mode_(false), | |
| 95 report_location_(false) { | |
| 96 if (!location_update_requester_) | |
| 97 location_update_requester_ = &content::RequestLocationUpdate; | |
| 98 idle_poll_timer_.Start(FROM_HERE, | |
| 99 TimeDelta::FromSeconds(kIdlePollIntervalSeconds), | |
| 100 this, &DeviceStatusCollector::CheckIdleState); | |
| 101 | |
| 102 cros_settings_ = chromeos::CrosSettings::Get(); | |
| 103 | |
| 104 // Watch for changes to the individual policies that control what the status | |
| 105 // reports contain. | |
| 106 cros_settings_->AddSettingsObserver(chromeos::kReportDeviceVersionInfo, this); | |
| 107 cros_settings_->AddSettingsObserver(chromeos::kReportDeviceActivityTimes, | |
| 108 this); | |
| 109 cros_settings_->AddSettingsObserver(chromeos::kReportDeviceBootMode, this); | |
| 110 cros_settings_->AddSettingsObserver(chromeos::kReportDeviceLocation, this); | |
| 111 | |
| 112 // The last known location is persisted in local state. This makes location | |
| 113 // information available immediately upon startup and avoids the need to | |
| 114 // reacquire the location on every user session change or browser crash. | |
| 115 content::Geoposition position; | |
| 116 std::string timestamp_str; | |
| 117 int64 timestamp; | |
| 118 const base::DictionaryValue* location = | |
| 119 local_state_->GetDictionary(prefs::kDeviceLocation); | |
| 120 if (location->GetDouble(kLatitude, &position.latitude) && | |
| 121 location->GetDouble(kLongitude, &position.longitude) && | |
| 122 location->GetDouble(kAltitude, &position.altitude) && | |
| 123 location->GetDouble(kAccuracy, &position.accuracy) && | |
| 124 location->GetDouble(kAltitudeAccuracy, &position.altitude_accuracy) && | |
| 125 location->GetDouble(kHeading, &position.heading) && | |
| 126 location->GetDouble(kSpeed, &position.speed) && | |
| 127 location->GetString(kTimestamp, ×tamp_str) && | |
| 128 base::StringToInt64(timestamp_str, ×tamp)) { | |
| 129 position.timestamp = Time::FromInternalValue(timestamp); | |
| 130 position_ = position; | |
| 131 } | |
| 132 | |
| 133 // Fetch the current values of the policies. | |
| 134 UpdateReportingSettings(); | |
| 135 | |
| 136 // Get the the OS and firmware version info. | |
| 137 version_loader_.GetVersion( | |
| 138 VersionLoader::VERSION_FULL, | |
| 139 base::Bind(&DeviceStatusCollector::OnOSVersion, base::Unretained(this)), | |
| 140 &tracker_); | |
| 141 version_loader_.GetFirmware( | |
| 142 base::Bind(&DeviceStatusCollector::OnOSFirmware, base::Unretained(this)), | |
| 143 &tracker_); | |
| 144 } | |
| 145 | |
| 146 DeviceStatusCollector::~DeviceStatusCollector() { | |
| 147 cros_settings_->RemoveSettingsObserver(chromeos::kReportDeviceVersionInfo, | |
| 148 this); | |
| 149 cros_settings_->RemoveSettingsObserver(chromeos::kReportDeviceActivityTimes, | |
| 150 this); | |
| 151 cros_settings_->RemoveSettingsObserver(chromeos::kReportDeviceBootMode, this); | |
| 152 cros_settings_->RemoveSettingsObserver(chromeos::kReportDeviceLocation, this); | |
| 153 } | |
| 154 | |
| 155 // static | |
| 156 void DeviceStatusCollector::RegisterPrefs(PrefRegistrySimple* registry) { | |
| 157 registry->RegisterDictionaryPref(prefs::kDeviceActivityTimes, | |
| 158 new base::DictionaryValue); | |
| 159 registry->RegisterDictionaryPref(prefs::kDeviceLocation, | |
| 160 new base::DictionaryValue); | |
| 161 } | |
| 162 | |
| 163 void DeviceStatusCollector::CheckIdleState() { | |
| 164 CalculateIdleState(kIdleStateThresholdSeconds, | |
| 165 base::Bind(&DeviceStatusCollector::IdleStateCallback, | |
| 166 base::Unretained(this))); | |
| 167 } | |
| 168 | |
| 169 void DeviceStatusCollector::UpdateReportingSettings() { | |
| 170 // Attempt to fetch the current value of the reporting settings. | |
| 171 // If trusted values are not available, register this function to be called | |
| 172 // back when they are available. | |
| 173 if (chromeos::CrosSettingsProvider::TRUSTED != | |
| 174 cros_settings_->PrepareTrustedValues( | |
| 175 base::Bind(&DeviceStatusCollector::UpdateReportingSettings, | |
| 176 weak_factory_.GetWeakPtr()))) { | |
| 177 return; | |
| 178 } | |
| 179 cros_settings_->GetBoolean( | |
| 180 chromeos::kReportDeviceVersionInfo, &report_version_info_); | |
| 181 cros_settings_->GetBoolean( | |
| 182 chromeos::kReportDeviceActivityTimes, &report_activity_times_); | |
| 183 cros_settings_->GetBoolean( | |
| 184 chromeos::kReportDeviceBootMode, &report_boot_mode_); | |
| 185 cros_settings_->GetBoolean( | |
| 186 chromeos::kReportDeviceLocation, &report_location_); | |
| 187 | |
| 188 if (report_location_) { | |
| 189 ScheduleGeolocationUpdateRequest(); | |
| 190 } else { | |
| 191 geolocation_update_timer_.Stop(); | |
| 192 position_ = content::Geoposition(); | |
| 193 local_state_->ClearPref(prefs::kDeviceLocation); | |
| 194 } | |
| 195 } | |
| 196 | |
| 197 Time DeviceStatusCollector::GetCurrentTime() { | |
| 198 return Time::Now(); | |
| 199 } | |
| 200 | |
| 201 // Remove all out-of-range activity times from the local store. | |
| 202 void DeviceStatusCollector::PruneStoredActivityPeriods(Time base_time) { | |
| 203 Time min_time = | |
| 204 base_time - TimeDelta::FromDays(max_stored_past_activity_days_); | |
| 205 Time max_time = | |
| 206 base_time + TimeDelta::FromDays(max_stored_future_activity_days_); | |
| 207 TrimStoredActivityPeriods(TimestampToDayKey(min_time), 0, | |
| 208 TimestampToDayKey(max_time)); | |
| 209 } | |
| 210 | |
| 211 void DeviceStatusCollector::TrimStoredActivityPeriods(int64 min_day_key, | |
| 212 int min_day_trim_duration, | |
| 213 int64 max_day_key) { | |
| 214 const base::DictionaryValue* activity_times = | |
| 215 local_state_->GetDictionary(prefs::kDeviceActivityTimes); | |
| 216 | |
| 217 scoped_ptr<base::DictionaryValue> copy(activity_times->DeepCopy()); | |
| 218 for (base::DictionaryValue::Iterator it(*activity_times); it.HasNext(); | |
| 219 it.Advance()) { | |
| 220 int64 timestamp; | |
| 221 if (base::StringToInt64(it.key(), ×tamp)) { | |
| 222 // Remove data that is too old, or too far in the future. | |
| 223 if (timestamp >= min_day_key && timestamp < max_day_key) { | |
| 224 if (timestamp == min_day_key) { | |
| 225 int new_activity_duration = 0; | |
| 226 if (it.value().GetAsInteger(&new_activity_duration)) { | |
| 227 new_activity_duration = | |
| 228 std::max(new_activity_duration - min_day_trim_duration, 0); | |
| 229 } | |
| 230 copy->SetInteger(it.key(), new_activity_duration); | |
| 231 } | |
| 232 continue; | |
| 233 } | |
| 234 } | |
| 235 // The entry is out of range or couldn't be parsed. Remove it. | |
| 236 copy->Remove(it.key(), NULL); | |
| 237 } | |
| 238 local_state_->Set(prefs::kDeviceActivityTimes, *copy); | |
| 239 } | |
| 240 | |
| 241 void DeviceStatusCollector::AddActivePeriod(Time start, Time end) { | |
| 242 DCHECK(start < end); | |
| 243 | |
| 244 // Maintain the list of active periods in a local_state pref. | |
| 245 DictionaryPrefUpdate update(local_state_, prefs::kDeviceActivityTimes); | |
| 246 base::DictionaryValue* activity_times = update.Get(); | |
| 247 | |
| 248 // Assign the period to day buckets in local time. | |
| 249 Time midnight = start.LocalMidnight(); | |
| 250 while (midnight < end) { | |
| 251 midnight += TimeDelta::FromDays(1); | |
| 252 int64 activity = (std::min(end, midnight) - start).InMilliseconds(); | |
| 253 std::string day_key = base::Int64ToString(TimestampToDayKey(start)); | |
| 254 int previous_activity = 0; | |
| 255 activity_times->GetInteger(day_key, &previous_activity); | |
| 256 activity_times->SetInteger(day_key, previous_activity + activity); | |
| 257 start = midnight; | |
| 258 } | |
| 259 } | |
| 260 | |
| 261 void DeviceStatusCollector::IdleStateCallback(IdleState state) { | |
| 262 // Do nothing if device activity reporting is disabled. | |
| 263 if (!report_activity_times_) | |
| 264 return; | |
| 265 | |
| 266 Time now = GetCurrentTime(); | |
| 267 | |
| 268 if (state == IDLE_STATE_ACTIVE) { | |
| 269 // If it's been too long since the last report, or if the activity is | |
| 270 // negative (which can happen when the clock changes), assume a single | |
| 271 // interval of activity. | |
| 272 int active_seconds = (now - last_idle_check_).InSeconds(); | |
| 273 if (active_seconds < 0 || | |
| 274 active_seconds >= static_cast<int>((2 * kIdlePollIntervalSeconds))) { | |
| 275 AddActivePeriod(now - TimeDelta::FromSeconds(kIdlePollIntervalSeconds), | |
| 276 now); | |
| 277 } else { | |
| 278 AddActivePeriod(last_idle_check_, now); | |
| 279 } | |
| 280 | |
| 281 PruneStoredActivityPeriods(now); | |
| 282 } | |
| 283 last_idle_check_ = now; | |
| 284 } | |
| 285 | |
| 286 void DeviceStatusCollector::GetActivityTimes( | |
| 287 em::DeviceStatusReportRequest* request) { | |
| 288 DictionaryPrefUpdate update(local_state_, prefs::kDeviceActivityTimes); | |
| 289 base::DictionaryValue* activity_times = update.Get(); | |
| 290 | |
| 291 for (base::DictionaryValue::Iterator it(*activity_times); !it.IsAtEnd(); | |
| 292 it.Advance()) { | |
| 293 int64 start_timestamp; | |
| 294 int activity_milliseconds; | |
| 295 if (base::StringToInt64(it.key(), &start_timestamp) && | |
| 296 it.value().GetAsInteger(&activity_milliseconds)) { | |
| 297 // This is correct even when there are leap seconds, because when a leap | |
| 298 // second occurs, two consecutive seconds have the same timestamp. | |
| 299 int64 end_timestamp = start_timestamp + kMillisecondsPerDay; | |
| 300 | |
| 301 em::ActiveTimePeriod* active_period = request->add_active_period(); | |
| 302 em::TimePeriod* period = active_period->mutable_time_period(); | |
| 303 period->set_start_timestamp(start_timestamp); | |
| 304 period->set_end_timestamp(end_timestamp); | |
| 305 active_period->set_active_duration(activity_milliseconds); | |
| 306 if (start_timestamp >= last_reported_day_) { | |
| 307 last_reported_day_ = start_timestamp; | |
| 308 duration_for_last_reported_day_ = activity_milliseconds; | |
| 309 } | |
| 310 } else { | |
| 311 NOTREACHED(); | |
| 312 } | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 void DeviceStatusCollector::GetVersionInfo( | |
| 317 em::DeviceStatusReportRequest* request) { | |
| 318 chrome::VersionInfo version_info; | |
| 319 request->set_browser_version(version_info.Version()); | |
| 320 request->set_os_version(os_version_); | |
| 321 request->set_firmware_version(firmware_version_); | |
| 322 } | |
| 323 | |
| 324 void DeviceStatusCollector::GetBootMode( | |
| 325 em::DeviceStatusReportRequest* request) { | |
| 326 std::string dev_switch_mode; | |
| 327 if (statistics_provider_->GetMachineStatistic( | |
| 328 "devsw_boot", &dev_switch_mode)) { | |
| 329 if (dev_switch_mode == "1") | |
| 330 request->set_boot_mode("Dev"); | |
| 331 else if (dev_switch_mode == "0") | |
| 332 request->set_boot_mode("Verified"); | |
| 333 } | |
| 334 } | |
| 335 | |
| 336 void DeviceStatusCollector::GetLocation( | |
| 337 em::DeviceStatusReportRequest* request) { | |
| 338 em::DeviceLocation* location = request->mutable_device_location(); | |
| 339 if (!position_.Validate()) { | |
| 340 location->set_error_code( | |
| 341 em::DeviceLocation::ERROR_CODE_POSITION_UNAVAILABLE); | |
| 342 location->set_error_message(position_.error_message); | |
| 343 } else { | |
| 344 location->set_latitude(position_.latitude); | |
| 345 location->set_longitude(position_.longitude); | |
| 346 location->set_accuracy(position_.accuracy); | |
| 347 location->set_timestamp( | |
| 348 (position_.timestamp - Time::UnixEpoch()).InMilliseconds()); | |
| 349 // Lowest point on land is at approximately -400 meters. | |
| 350 if (position_.altitude > -10000.) | |
| 351 location->set_altitude(position_.altitude); | |
| 352 if (position_.altitude_accuracy >= 0.) | |
| 353 location->set_altitude_accuracy(position_.altitude_accuracy); | |
| 354 if (position_.heading >= 0. && position_.heading <= 360) | |
| 355 location->set_heading(position_.heading); | |
| 356 if (position_.speed >= 0.) | |
| 357 location->set_speed(position_.speed); | |
| 358 location->set_error_code(em::DeviceLocation::ERROR_CODE_NONE); | |
| 359 } | |
| 360 } | |
| 361 | |
| 362 void DeviceStatusCollector::GetStatus(em::DeviceStatusReportRequest* request) { | |
| 363 // TODO(mnissler): Remove once the old cloud policy stack is retired. The old | |
| 364 // stack doesn't support reporting successful submissions back to here, so | |
| 365 // just assume whatever ends up in |request| gets submitted successfully. | |
| 366 GetDeviceStatus(request); | |
| 367 OnSubmittedSuccessfully(); | |
| 368 } | |
| 369 | |
| 370 bool DeviceStatusCollector::GetDeviceStatus( | |
| 371 em::DeviceStatusReportRequest* status) { | |
| 372 if (report_activity_times_) | |
| 373 GetActivityTimes(status); | |
| 374 | |
| 375 if (report_version_info_) | |
| 376 GetVersionInfo(status); | |
| 377 | |
| 378 if (report_boot_mode_) | |
| 379 GetBootMode(status); | |
| 380 | |
| 381 if (report_location_) | |
| 382 GetLocation(status); | |
| 383 | |
| 384 return true; | |
| 385 } | |
| 386 | |
| 387 bool DeviceStatusCollector::GetSessionStatus( | |
| 388 em::SessionStatusReportRequest* status) { | |
| 389 return false; | |
| 390 } | |
| 391 | |
| 392 void DeviceStatusCollector::OnSubmittedSuccessfully() { | |
| 393 TrimStoredActivityPeriods(last_reported_day_, duration_for_last_reported_day_, | |
| 394 std::numeric_limits<int64>::max()); | |
| 395 } | |
| 396 | |
| 397 void DeviceStatusCollector::OnOSVersion(const std::string& version) { | |
| 398 os_version_ = version; | |
| 399 } | |
| 400 | |
| 401 void DeviceStatusCollector::OnOSFirmware(const std::string& version) { | |
| 402 firmware_version_ = version; | |
| 403 } | |
| 404 | |
| 405 void DeviceStatusCollector::Observe( | |
| 406 int type, | |
| 407 const content::NotificationSource& source, | |
| 408 const content::NotificationDetails& details) { | |
| 409 if (type == chrome::NOTIFICATION_SYSTEM_SETTING_CHANGED) | |
| 410 UpdateReportingSettings(); | |
| 411 else | |
| 412 NOTREACHED(); | |
| 413 } | |
| 414 | |
| 415 void DeviceStatusCollector::ScheduleGeolocationUpdateRequest() { | |
| 416 if (geolocation_update_timer_.IsRunning() || geolocation_update_in_progress_) | |
| 417 return; | |
| 418 | |
| 419 if (position_.Validate()) { | |
| 420 TimeDelta elapsed = GetCurrentTime() - position_.timestamp; | |
| 421 TimeDelta interval = | |
| 422 TimeDelta::FromSeconds(kGeolocationPollIntervalSeconds); | |
| 423 if (elapsed > interval) { | |
| 424 geolocation_update_in_progress_ = true; | |
| 425 location_update_requester_(base::Bind( | |
| 426 &DeviceStatusCollector::ReceiveGeolocationUpdate, | |
| 427 weak_factory_.GetWeakPtr())); | |
| 428 } else { | |
| 429 geolocation_update_timer_.Start( | |
| 430 FROM_HERE, | |
| 431 interval - elapsed, | |
| 432 this, | |
| 433 &DeviceStatusCollector::ScheduleGeolocationUpdateRequest); | |
| 434 } | |
| 435 } else { | |
| 436 geolocation_update_in_progress_ = true; | |
| 437 location_update_requester_(base::Bind( | |
| 438 &DeviceStatusCollector::ReceiveGeolocationUpdate, | |
| 439 weak_factory_.GetWeakPtr())); | |
| 440 | |
| 441 } | |
| 442 } | |
| 443 | |
| 444 void DeviceStatusCollector::ReceiveGeolocationUpdate( | |
| 445 const content::Geoposition& position) { | |
| 446 geolocation_update_in_progress_ = false; | |
| 447 | |
| 448 // Ignore update if device location reporting has since been disabled. | |
| 449 if (!report_location_) | |
| 450 return; | |
| 451 | |
| 452 if (position.Validate()) { | |
| 453 position_ = position; | |
| 454 base::DictionaryValue location; | |
| 455 location.SetDouble(kLatitude, position.latitude); | |
| 456 location.SetDouble(kLongitude, position.longitude); | |
| 457 location.SetDouble(kAltitude, position.altitude); | |
| 458 location.SetDouble(kAccuracy, position.accuracy); | |
| 459 location.SetDouble(kAltitudeAccuracy, position.altitude_accuracy); | |
| 460 location.SetDouble(kHeading, position.heading); | |
| 461 location.SetDouble(kSpeed, position.speed); | |
| 462 location.SetString(kTimestamp, | |
| 463 base::Int64ToString(position.timestamp.ToInternalValue())); | |
| 464 local_state_->Set(prefs::kDeviceLocation, location); | |
| 465 } | |
| 466 | |
| 467 ScheduleGeolocationUpdateRequest(); | |
| 468 } | |
| 469 | |
| 470 } // namespace policy | |
| OLD | NEW |
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Chromium Code Reviews
Issue 12189011:
Split up chrome/browser/policy subdirectory (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src