device/bluetooth/bluetooth_adapter_chromeos.cc

   1 // Copyright 2013 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 "device/bluetooth/bluetooth_adapter_chromeos.h"
   6
   7 #include <string>
   8
   9 #include "base/bind.h"
  10 #include "base/location.h"
  11 #include "base/logging.h"
  12 #include "base/metrics/histogram.h"
  13 #include "base/sequenced_task_runner.h"
  14 #include "base/single_thread_task_runner.h"
  15 #include "base/sys_info.h"
  16 #include "base/thread_task_runner_handle.h"
  17 #include "chromeos/dbus/bluetooth_adapter_client.h"
  18 #include "chromeos/dbus/bluetooth_agent_manager_client.h"
  19 #include "chromeos/dbus/bluetooth_agent_service_provider.h"
  20 #include "chromeos/dbus/bluetooth_device_client.h"
  21 #include "chromeos/dbus/bluetooth_input_client.h"
  22 #include "chromeos/dbus/dbus_thread_manager.h"
  23 #include "device/bluetooth/bluetooth_adapter_profile_chromeos.h"
  24 #include "device/bluetooth/bluetooth_audio_sink_chromeos.h"
  25 #include "device/bluetooth/bluetooth_device.h"
  26 #include "device/bluetooth/bluetooth_device_chromeos.h"
  27 #include "device/bluetooth/bluetooth_pairing_chromeos.h"
  28 #include "device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.h"
  29 #include "device/bluetooth/bluetooth_remote_gatt_descriptor_chromeos.h"
  30 #include "device/bluetooth/bluetooth_remote_gatt_service_chromeos.h"
  31 #include "device/bluetooth/bluetooth_socket_chromeos.h"
  32 #include "device/bluetooth/bluetooth_socket_thread.h"
  33 #include "device/bluetooth/bluetooth_uuid.h"
  34 #include "third_party/cros_system_api/dbus/service_constants.h"
  35
  36 using device::BluetoothAdapter;
  37 using device::BluetoothAudioSink;
  38 using device::BluetoothDevice;
  39 using device::BluetoothSocket;
  40 using device::BluetoothUUID;
  41
  42 namespace {
  43
  44 // The agent path is relatively meaningless since BlueZ only permits one to
  45 // exist per D-Bus connection, it just has to be unique within Chromium.
  46 const char kAgentPath[] = "/org/chromium/bluetooth_agent";
  47
  48 void OnUnregisterAgentError(const std::string& error_name,
  49                             const std::string& error_message) {
  50   // It's okay if the agent didn't exist, it means we never saw an adapter.
  51   if (error_name == bluetooth_agent_manager::kErrorDoesNotExist)
  52     return;
  53
  54   LOG(WARNING) << "Failed to unregister pairing agent: "
  55                << error_name << ": " << error_message;
  56 }
  57
  58 }  // namespace
  59
  60 namespace device {
  61
  62 // static
  63 base::WeakPtr<BluetoothAdapter> BluetoothAdapter::CreateAdapter(
  64     const InitCallback& init_callback) {
  65   return chromeos::BluetoothAdapterChromeOS::CreateAdapter();
  66 }
  67
  68 }
  69
  70 namespace chromeos {
  71
  72 // static
  73 base::WeakPtr<BluetoothAdapter> BluetoothAdapterChromeOS::CreateAdapter() {
  74   BluetoothAdapterChromeOS* adapter = new BluetoothAdapterChromeOS();
  75   return adapter->weak_ptr_factory_.GetWeakPtr();
  76 }
  77
  78 void BluetoothAdapterChromeOS::Shutdown() {
  79   if (dbus_is_shutdown_)
  80     return;
  81   DCHECK(DBusThreadManager::IsInitialized())
  82       << "Call BluetoothAdapterFactory::Shutdown() before "
  83          "DBusThreadManager::Shutdown().";
  84
  85   if (IsPresent())
  86     RemoveAdapter();  // Also deletes devices_.
  87   DCHECK(devices_.empty());
  88   // profiles_ should be empty because all BluetoothSockets have been signaled
  89   // that this adapter is disappearing.
  90   DCHECK(profiles_.empty());
  91
  92   for (auto& it : profile_queues_)
  93     delete it.second;
  94   profile_queues_.clear();
  95
  96   DBusThreadManager::Get()->GetBluetoothAdapterClient()->RemoveObserver(this);
  97   DBusThreadManager::Get()->GetBluetoothDeviceClient()->RemoveObserver(this);
  98   DBusThreadManager::Get()->GetBluetoothInputClient()->RemoveObserver(this);
  99
 100   VLOG(1) << "Unregistering pairing agent";
 101   DBusThreadManager::Get()->GetBluetoothAgentManagerClient()->UnregisterAgent(
 102       dbus::ObjectPath(kAgentPath), base::Bind(&base::DoNothing),
 103       base::Bind(&OnUnregisterAgentError));
 104
 105   agent_.reset();
 106   dbus_is_shutdown_ = true;
 107 }
 108
 109 BluetoothAdapterChromeOS::BluetoothAdapterChromeOS()
 110     : dbus_is_shutdown_(false),
 111       num_discovery_sessions_(0),
 112       discovery_request_pending_(false),
 113       weak_ptr_factory_(this) {
 114   ui_task_runner_ = base::ThreadTaskRunnerHandle::Get();
 115   socket_thread_ = device::BluetoothSocketThread::Get();
 116
 117   DBusThreadManager::Get()->GetBluetoothAdapterClient()->AddObserver(this);
 118   DBusThreadManager::Get()->GetBluetoothDeviceClient()->AddObserver(this);
 119   DBusThreadManager::Get()->GetBluetoothInputClient()->AddObserver(this);
 120
 121   // Register the pairing agent.
 122   dbus::Bus* system_bus = DBusThreadManager::Get()->GetSystemBus();
 123   agent_.reset(BluetoothAgentServiceProvider::Create(
 124       system_bus, dbus::ObjectPath(kAgentPath), this));
 125   DCHECK(agent_.get());
 126
 127   std::vector<dbus::ObjectPath> object_paths =
 128       DBusThreadManager::Get()->GetBluetoothAdapterClient()->GetAdapters();
 129
 130   if (!object_paths.empty()) {
 131     VLOG(1) << object_paths.size() << " Bluetooth adapter(s) available.";
 132     SetAdapter(object_paths[0]);
 133   }
 134 }
 135
 136 BluetoothAdapterChromeOS::~BluetoothAdapterChromeOS() {
 137   Shutdown();
 138 }
 139
 140 void BluetoothAdapterChromeOS::DeleteOnCorrectThread() const {
 141   if (ui_task_runner_->RunsTasksOnCurrentThread() ||
 142       !ui_task_runner_->DeleteSoon(FROM_HERE, this))
 143     delete this;
 144 }
 145
 146 void BluetoothAdapterChromeOS::AddObserver(
 147     BluetoothAdapter::Observer* observer) {
 148   DCHECK(observer);
 149   observers_.AddObserver(observer);
 150 }
 151
 152 void BluetoothAdapterChromeOS::RemoveObserver(
 153     BluetoothAdapter::Observer* observer) {
 154   DCHECK(observer);
 155   observers_.RemoveObserver(observer);
 156 }
 157
 158 std::string BluetoothAdapterChromeOS::GetAddress() const {
 159   if (!IsPresent())
 160     return std::string();
 161
 162   BluetoothAdapterClient::Properties* properties =
 163       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 164           GetProperties(object_path_);
 165   DCHECK(properties);
 166
 167   return BluetoothDevice::CanonicalizeAddress(properties->address.value());
 168 }
 169
 170 std::string BluetoothAdapterChromeOS::GetName() const {
 171   if (!IsPresent())
 172     return std::string();
 173
 174   BluetoothAdapterClient::Properties* properties =
 175       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 176           GetProperties(object_path_);
 177   DCHECK(properties);
 178
 179   return properties->alias.value();
 180 }
 181
 182 void BluetoothAdapterChromeOS::SetName(const std::string& name,
 183                                        const base::Closure& callback,
 184                                        const ErrorCallback& error_callback) {
 185   if (!IsPresent()) {
 186     error_callback.Run();
 187     return;
 188   }
 189
 190   DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 191       GetProperties(object_path_)->alias.Set(
 192           name,
 193           base::Bind(&BluetoothAdapterChromeOS::OnPropertyChangeCompleted,
 194                      weak_ptr_factory_.GetWeakPtr(),
 195                      callback,
 196                      error_callback));
 197 }
 198
 199 bool BluetoothAdapterChromeOS::IsInitialized() const {
 200   return true;
 201 }
 202
 203 bool BluetoothAdapterChromeOS::IsPresent() const {
 204   return !dbus_is_shutdown_ && !object_path_.value().empty();
 205 }
 206
 207 bool BluetoothAdapterChromeOS::IsPowered() const {
 208   if (!IsPresent())
 209     return false;
 210
 211   BluetoothAdapterClient::Properties* properties =
 212       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 213           GetProperties(object_path_);
 214
 215   return properties->powered.value();
 216 }
 217
 218 void BluetoothAdapterChromeOS::SetPowered(
 219     bool powered,
 220     const base::Closure& callback,
 221     const ErrorCallback& error_callback) {
 222   if (!IsPresent()) {
 223     error_callback.Run();
 224     return;
 225   }
 226
 227   DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 228       GetProperties(object_path_)->powered.Set(
 229           powered,
 230           base::Bind(&BluetoothAdapterChromeOS::OnPropertyChangeCompleted,
 231                      weak_ptr_factory_.GetWeakPtr(),
 232                      callback,
 233                      error_callback));
 234 }
 235
 236 bool BluetoothAdapterChromeOS::IsDiscoverable() const {
 237   if (!IsPresent())
 238     return false;
 239
 240   BluetoothAdapterClient::Properties* properties =
 241       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 242           GetProperties(object_path_);
 243
 244   return properties->discoverable.value();
 245 }
 246
 247 void BluetoothAdapterChromeOS::SetDiscoverable(
 248     bool discoverable,
 249     const base::Closure& callback,
 250     const ErrorCallback& error_callback) {
 251   if (!IsPresent()) {
 252     error_callback.Run();
 253     return;
 254   }
 255
 256   DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 257       GetProperties(object_path_)->discoverable.Set(
 258           discoverable,
 259           base::Bind(&BluetoothAdapterChromeOS::OnSetDiscoverable,
 260                      weak_ptr_factory_.GetWeakPtr(),
 261                      callback,
 262                      error_callback));
 263 }
 264
 265 bool BluetoothAdapterChromeOS::IsDiscovering() const {
 266   if (!IsPresent())
 267     return false;
 268
 269   BluetoothAdapterClient::Properties* properties =
 270       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 271           GetProperties(object_path_);
 272
 273   return properties->discovering.value();
 274 }
 275
 276 void BluetoothAdapterChromeOS::CreateRfcommService(
 277     const BluetoothUUID& uuid,
 278     const ServiceOptions& options,
 279     const CreateServiceCallback& callback,
 280     const CreateServiceErrorCallback& error_callback) {
 281   DCHECK(!dbus_is_shutdown_);
 282   VLOG(1) << object_path_.value() << ": Creating RFCOMM service: "
 283           << uuid.canonical_value();
 284   scoped_refptr<BluetoothSocketChromeOS> socket =
 285       BluetoothSocketChromeOS::CreateBluetoothSocket(
 286           ui_task_runner_, socket_thread_);
 287   socket->Listen(this,
 288                  BluetoothSocketChromeOS::kRfcomm,
 289                  uuid,
 290                  options,
 291                  base::Bind(callback, socket),
 292                  error_callback);
 293 }
 294
 295 void BluetoothAdapterChromeOS::CreateL2capService(
 296     const BluetoothUUID& uuid,
 297     const ServiceOptions& options,
 298     const CreateServiceCallback& callback,
 299     const CreateServiceErrorCallback& error_callback) {
 300   DCHECK(!dbus_is_shutdown_);
 301   VLOG(1) << object_path_.value() << ": Creating L2CAP service: "
 302           << uuid.canonical_value();
 303   scoped_refptr<BluetoothSocketChromeOS> socket =
 304       BluetoothSocketChromeOS::CreateBluetoothSocket(
 305           ui_task_runner_, socket_thread_);
 306   socket->Listen(this,
 307                  BluetoothSocketChromeOS::kL2cap,
 308                  uuid,
 309                  options,
 310                  base::Bind(callback, socket),
 311                  error_callback);
 312 }
 313
 314 void BluetoothAdapterChromeOS::RegisterAudioSink(
 315     const BluetoothAudioSink::Options& options,
 316     const device::BluetoothAdapter::AcquiredCallback& callback,
 317     const BluetoothAudioSink::ErrorCallback& error_callback) {
 318   VLOG(1) << "Registering audio sink";
 319   if (!this->IsPresent()) {
 320     error_callback.Run(BluetoothAudioSink::ERROR_INVALID_ADAPTER);
 321     return;
 322   }
 323   scoped_refptr<BluetoothAudioSinkChromeOS> audio_sink(
 324       new BluetoothAudioSinkChromeOS(this));
 325   audio_sink->Register(
 326       options, base::Bind(&BluetoothAdapterChromeOS::OnRegisterAudioSink,
 327                           weak_ptr_factory_.GetWeakPtr(), callback,
 328                           error_callback, audio_sink),
 329       error_callback);
 330 }
 331
 332 void BluetoothAdapterChromeOS::RemovePairingDelegateInternal(
 333     BluetoothDevice::PairingDelegate* pairing_delegate) {
 334   // Before removing a pairing delegate make sure that there aren't any devices
 335   // currently using it; if there are, clear the pairing context which will
 336   // make any responses no-ops.
 337   for (DevicesMap::iterator iter = devices_.begin();
 338        iter != devices_.end(); ++iter) {
 339     BluetoothDeviceChromeOS* device_chromeos =
 340         static_cast<BluetoothDeviceChromeOS*>(iter->second);
 341
 342     BluetoothPairingChromeOS* pairing = device_chromeos->GetPairing();
 343     if (pairing && pairing->GetPairingDelegate() == pairing_delegate)
 344       device_chromeos->EndPairing();
 345   }
 346 }
 347
 348 void BluetoothAdapterChromeOS::AdapterAdded(
 349     const dbus::ObjectPath& object_path) {
 350   // Set the adapter to the newly added adapter only if no adapter is present.
 351   if (!IsPresent())
 352     SetAdapter(object_path);
 353 }
 354
 355 void BluetoothAdapterChromeOS::AdapterRemoved(
 356     const dbus::ObjectPath& object_path) {
 357   if (object_path == object_path_)
 358     RemoveAdapter();
 359 }
 360
 361 void BluetoothAdapterChromeOS::AdapterPropertyChanged(
 362     const dbus::ObjectPath& object_path,
 363     const std::string& property_name) {
 364   if (object_path != object_path_)
 365     return;
 366   DCHECK(IsPresent());
 367
 368   BluetoothAdapterClient::Properties* properties =
 369       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 370           GetProperties(object_path_);
 371
 372   if (property_name == properties->powered.name())
 373     PoweredChanged(properties->powered.value());
 374   else if (property_name == properties->discoverable.name())
 375     DiscoverableChanged(properties->discoverable.value());
 376   else if (property_name == properties->discovering.name())
 377     DiscoveringChanged(properties->discovering.value());
 378 }
 379
 380 void BluetoothAdapterChromeOS::DeviceAdded(
 381   const dbus::ObjectPath& object_path) {
 382   DCHECK(DBusThreadManager::Get());
 383   BluetoothDeviceClient::Properties* properties =
 384       DBusThreadManager::Get()->GetBluetoothDeviceClient()->
 385           GetProperties(object_path);
 386   if (!properties || properties->adapter.value() != object_path_)
 387     return;
 388   DCHECK(IsPresent());
 389
 390   BluetoothDeviceChromeOS* device_chromeos =
 391       new BluetoothDeviceChromeOS(this,
 392                                   object_path,
 393                                   ui_task_runner_,
 394                                   socket_thread_);
 395   DCHECK(devices_.find(device_chromeos->GetAddress()) == devices_.end());
 396
 397   devices_[device_chromeos->GetAddress()] = device_chromeos;
 398
 399   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 400                     DeviceAdded(this, device_chromeos));
 401 }
 402
 403 void BluetoothAdapterChromeOS::DeviceRemoved(
 404     const dbus::ObjectPath& object_path) {
 405   for (DevicesMap::iterator iter = devices_.begin();
 406        iter != devices_.end(); ++iter) {
 407     BluetoothDeviceChromeOS* device_chromeos =
 408         static_cast<BluetoothDeviceChromeOS*>(iter->second);
 409     if (device_chromeos->object_path() == object_path) {
 410       devices_.erase(iter);
 411
 412       FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 413                         DeviceRemoved(this, device_chromeos));
 414       delete device_chromeos;
 415       return;
 416     }
 417   }
 418 }
 419
 420 void BluetoothAdapterChromeOS::DevicePropertyChanged(
 421     const dbus::ObjectPath& object_path,
 422     const std::string& property_name) {
 423   BluetoothDeviceChromeOS* device_chromeos = GetDeviceWithPath(object_path);
 424   if (!device_chromeos)
 425     return;
 426
 427   BluetoothDeviceClient::Properties* properties =
 428       DBusThreadManager::Get()->GetBluetoothDeviceClient()->
 429           GetProperties(object_path);
 430
 431   if (property_name == properties->bluetooth_class.name() ||
 432       property_name == properties->address.name() ||
 433       property_name == properties->alias.name() ||
 434       property_name == properties->paired.name() ||
 435       property_name == properties->trusted.name() ||
 436       property_name == properties->connected.name() ||
 437       property_name == properties->uuids.name() ||
 438       property_name == properties->rssi.name())
 439     NotifyDeviceChanged(device_chromeos);
 440
 441   // When a device becomes paired, mark it as trusted so that the user does
 442   // not need to approve every incoming connection
 443   if (property_name == properties->paired.name() &&
 444       properties->paired.value() && !properties->trusted.value())
 445     device_chromeos->SetTrusted();
 446
 447   // UMA connection counting
 448   if (property_name == properties->connected.name()) {
 449     // PlayStation joystick tries to reconnect after disconnection from USB.
 450     // If it is still not trusted, set it, so it becomes available on the
 451     // list of known devices.
 452     if (properties->connected.value() && device_chromeos->IsTrustable() &&
 453         !properties->trusted.value())
 454       device_chromeos->SetTrusted();
 455
 456     int count = 0;
 457
 458     for (DevicesMap::iterator iter = devices_.begin();
 459          iter != devices_.end(); ++iter) {
 460       if (iter->second->IsPaired() && iter->second->IsConnected())
 461         ++count;
 462     }
 463
 464     UMA_HISTOGRAM_COUNTS_100("Bluetooth.ConnectedDeviceCount", count);
 465   }
 466 }
 467
 468 void BluetoothAdapterChromeOS::InputPropertyChanged(
 469     const dbus::ObjectPath& object_path,
 470     const std::string& property_name) {
 471   BluetoothDeviceChromeOS* device_chromeos = GetDeviceWithPath(object_path);
 472   if (!device_chromeos)
 473     return;
 474
 475   BluetoothInputClient::Properties* properties =
 476       DBusThreadManager::Get()->GetBluetoothInputClient()->
 477           GetProperties(object_path);
 478
 479   // Properties structure can be removed, which triggers a change in the
 480   // BluetoothDevice::IsConnectable() property, as does a change in the
 481   // actual reconnect_mode property.
 482   if (!properties ||
 483       property_name == properties->reconnect_mode.name())
 484     NotifyDeviceChanged(device_chromeos);
 485 }
 486
 487 void BluetoothAdapterChromeOS::Released() {
 488   VLOG(1) << "Release";
 489   if (!IsPresent())
 490     return;
 491   DCHECK(agent_.get());
 492
 493   // Called after we unregister the pairing agent, e.g. when changing I/O
 494   // capabilities. Nothing much to be done right now.
 495 }
 496
 497 void BluetoothAdapterChromeOS::RequestPinCode(
 498     const dbus::ObjectPath& device_path,
 499     const PinCodeCallback& callback) {
 500   DCHECK(IsPresent());
 501   DCHECK(agent_.get());
 502   VLOG(1) << device_path.value() << ": RequestPinCode";
 503
 504   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 505   if (!pairing) {
 506     callback.Run(REJECTED, "");
 507     return;
 508   }
 509
 510   pairing->RequestPinCode(callback);
 511 }
 512
 513 void BluetoothAdapterChromeOS::DisplayPinCode(
 514     const dbus::ObjectPath& device_path,
 515     const std::string& pincode) {
 516   DCHECK(IsPresent());
 517   DCHECK(agent_.get());
 518   VLOG(1) << device_path.value() << ": DisplayPinCode: " << pincode;
 519
 520   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 521   if (!pairing)
 522     return;
 523
 524   pairing->DisplayPinCode(pincode);
 525 }
 526
 527 void BluetoothAdapterChromeOS::RequestPasskey(
 528     const dbus::ObjectPath& device_path,
 529     const PasskeyCallback& callback) {
 530   DCHECK(IsPresent());
 531   DCHECK(agent_.get());
 532   VLOG(1) << device_path.value() << ": RequestPasskey";
 533
 534   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 535   if (!pairing) {
 536     callback.Run(REJECTED, 0);
 537     return;
 538   }
 539
 540   pairing->RequestPasskey(callback);
 541 }
 542
 543 void BluetoothAdapterChromeOS::DisplayPasskey(
 544     const dbus::ObjectPath& device_path,
 545     uint32 passkey,
 546     uint16 entered) {
 547   DCHECK(IsPresent());
 548   DCHECK(agent_.get());
 549   VLOG(1) << device_path.value() << ": DisplayPasskey: " << passkey
 550           << " (" << entered << " entered)";
 551
 552   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 553   if (!pairing)
 554     return;
 555
 556   if (entered == 0)
 557     pairing->DisplayPasskey(passkey);
 558
 559   pairing->KeysEntered(entered);
 560 }
 561
 562 void BluetoothAdapterChromeOS::RequestConfirmation(
 563     const dbus::ObjectPath& device_path,
 564     uint32 passkey,
 565     const ConfirmationCallback& callback) {
 566   DCHECK(IsPresent());
 567   DCHECK(agent_.get());
 568   VLOG(1) << device_path.value() << ": RequestConfirmation: " << passkey;
 569
 570   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 571   if (!pairing) {
 572     callback.Run(REJECTED);
 573     return;
 574   }
 575
 576   pairing->RequestConfirmation(passkey, callback);
 577 }
 578
 579 void BluetoothAdapterChromeOS::RequestAuthorization(
 580     const dbus::ObjectPath& device_path,
 581     const ConfirmationCallback& callback) {
 582   DCHECK(IsPresent());
 583   DCHECK(agent_.get());
 584   VLOG(1) << device_path.value() << ": RequestAuthorization";
 585
 586   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 587   if (!pairing) {
 588     callback.Run(REJECTED);
 589     return;
 590   }
 591
 592   pairing->RequestAuthorization(callback);
 593 }
 594
 595 void BluetoothAdapterChromeOS::AuthorizeService(
 596     const dbus::ObjectPath& device_path,
 597     const std::string& uuid,
 598     const ConfirmationCallback& callback) {
 599   DCHECK(IsPresent());
 600   DCHECK(agent_.get());
 601   VLOG(1) << device_path.value() << ": AuthorizeService: " << uuid;
 602
 603   BluetoothDeviceChromeOS* device_chromeos = GetDeviceWithPath(device_path);
 604   if (!device_chromeos) {
 605     callback.Run(CANCELLED);
 606     return;
 607   }
 608
 609   // We always set paired devices to Trusted, so the only reason that this
 610   // method call would ever be called is in the case of a race condition where
 611   // our "Set('Trusted', true)" method call is still pending in the Bluetooth
 612   // daemon because it's busy handling the incoming connection.
 613   if (device_chromeos->IsPaired()) {
 614     callback.Run(SUCCESS);
 615     return;
 616   }
 617
 618   // TODO(keybuk): reject service authorizations when not paired, determine
 619   // whether this is acceptable long-term.
 620   LOG(WARNING) << "Rejecting service connection from unpaired device "
 621                << device_chromeos->GetAddress() << " for UUID " << uuid;
 622   callback.Run(REJECTED);
 623 }
 624
 625 void BluetoothAdapterChromeOS::Cancel() {
 626   DCHECK(IsPresent());
 627   DCHECK(agent_.get());
 628   VLOG(1) << "Cancel";
 629 }
 630
 631 void BluetoothAdapterChromeOS::OnRegisterAgent() {
 632   VLOG(1) << "Pairing agent registered, requesting to be made default";
 633
 634   DBusThreadManager::Get()->GetBluetoothAgentManagerClient()->
 635       RequestDefaultAgent(
 636           dbus::ObjectPath(kAgentPath),
 637           base::Bind(&BluetoothAdapterChromeOS::OnRequestDefaultAgent,
 638                      weak_ptr_factory_.GetWeakPtr()),
 639           base::Bind(&BluetoothAdapterChromeOS::OnRequestDefaultAgentError,
 640                      weak_ptr_factory_.GetWeakPtr()));
 641 }
 642
 643 void BluetoothAdapterChromeOS::OnRegisterAgentError(
 644     const std::string& error_name,
 645     const std::string& error_message) {
 646   // Our agent being already registered isn't an error.
 647   if (error_name == bluetooth_agent_manager::kErrorAlreadyExists)
 648     return;
 649
 650   LOG(WARNING) << ": Failed to register pairing agent: "
 651                << error_name << ": " << error_message;
 652 }
 653
 654 void BluetoothAdapterChromeOS::OnRequestDefaultAgent() {
 655   VLOG(1) << "Pairing agent now default";
 656 }
 657
 658 void BluetoothAdapterChromeOS::OnRequestDefaultAgentError(
 659     const std::string& error_name,
 660     const std::string& error_message) {
 661   LOG(WARNING) << ": Failed to make pairing agent default: "
 662                << error_name << ": " << error_message;
 663 }
 664
 665 void BluetoothAdapterChromeOS::OnRegisterAudioSink(
 666     const device::BluetoothAdapter::AcquiredCallback& callback,
 667     const device::BluetoothAudioSink::ErrorCallback& error_callback,
 668     scoped_refptr<BluetoothAudioSink> audio_sink) {
 669   if (!IsPresent()) {
 670     VLOG(1) << "Failed to register audio sink, adapter not present";
 671     error_callback.Run(BluetoothAudioSink::ERROR_INVALID_ADAPTER);
 672     return;
 673   }
 674   DCHECK(audio_sink.get());
 675   callback.Run(audio_sink);
 676 }
 677
 678 BluetoothDeviceChromeOS*
 679 BluetoothAdapterChromeOS::GetDeviceWithPath(
 680     const dbus::ObjectPath& object_path) {
 681   if (!IsPresent())
 682     return NULL;
 683
 684   for (DevicesMap::iterator iter = devices_.begin(); iter != devices_.end();
 685        ++iter) {
 686     BluetoothDeviceChromeOS* device_chromeos =
 687         static_cast<BluetoothDeviceChromeOS*>(iter->second);
 688     if (device_chromeos->object_path() == object_path)
 689       return device_chromeos;
 690   }
 691
 692   return NULL;
 693 }
 694
 695 BluetoothPairingChromeOS* BluetoothAdapterChromeOS::GetPairing(
 696     const dbus::ObjectPath& object_path) {
 697   DCHECK(IsPresent());
 698   BluetoothDeviceChromeOS* device_chromeos = GetDeviceWithPath(object_path);
 699   if (!device_chromeos) {
 700     LOG(WARNING) << "Pairing Agent request for unknown device: "
 701                  << object_path.value();
 702     return NULL;
 703   }
 704
 705   BluetoothPairingChromeOS* pairing = device_chromeos->GetPairing();
 706   if (pairing)
 707     return pairing;
 708
 709   // The device doesn't have its own pairing context, so this is an incoming
 710   // pairing request that should use our best default delegate (if we have one).
 711   BluetoothDevice::PairingDelegate* pairing_delegate = DefaultPairingDelegate();
 712   if (!pairing_delegate)
 713     return NULL;
 714
 715   return device_chromeos->BeginPairing(pairing_delegate);
 716 }
 717
 718 void BluetoothAdapterChromeOS::SetAdapter(const dbus::ObjectPath& object_path) {
 719   DCHECK(!IsPresent());
 720   DCHECK(!dbus_is_shutdown_);
 721   object_path_ = object_path;
 722
 723   VLOG(1) << object_path_.value() << ": using adapter.";
 724
 725   VLOG(1) << "Registering pairing agent";
 726   DBusThreadManager::Get()->GetBluetoothAgentManagerClient()->
 727       RegisterAgent(
 728           dbus::ObjectPath(kAgentPath),
 729           bluetooth_agent_manager::kKeyboardDisplayCapability,
 730           base::Bind(&BluetoothAdapterChromeOS::OnRegisterAgent,
 731                      weak_ptr_factory_.GetWeakPtr()),
 732           base::Bind(&BluetoothAdapterChromeOS::OnRegisterAgentError,
 733                      weak_ptr_factory_.GetWeakPtr()));
 734
 735   SetDefaultAdapterName();
 736
 737   BluetoothAdapterClient::Properties* properties =
 738       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 739           GetProperties(object_path_);
 740
 741   PresentChanged(true);
 742
 743   if (properties->powered.value())
 744     PoweredChanged(true);
 745   if (properties->discoverable.value())
 746     DiscoverableChanged(true);
 747   if (properties->discovering.value())
 748     DiscoveringChanged(true);
 749
 750   std::vector<dbus::ObjectPath> device_paths =
 751       DBusThreadManager::Get()->GetBluetoothDeviceClient()->
 752           GetDevicesForAdapter(object_path_);
 753
 754   for (std::vector<dbus::ObjectPath>::iterator iter = device_paths.begin();
 755        iter != device_paths.end(); ++iter) {
 756     DeviceAdded(*iter);
 757   }
 758 }
 759
 760 void BluetoothAdapterChromeOS::SetDefaultAdapterName() {
 761   DCHECK(IsPresent());
 762   std::string board = base::SysInfo::GetLsbReleaseBoard();
 763   std::string alias;
 764   if (board.substr(0, 6) == "stumpy") {
 765     alias = "Chromebox";
 766   } else if (board.substr(0, 4) == "link") {
 767     alias = "Chromebook Pixel";
 768   } else {
 769     alias = "Chromebook";
 770   }
 771
 772   SetName(alias, base::Bind(&base::DoNothing), base::Bind(&base::DoNothing));
 773 }
 774
 775 void BluetoothAdapterChromeOS::RemoveAdapter() {
 776   DCHECK(IsPresent());
 777   VLOG(1) << object_path_.value() << ": adapter removed.";
 778
 779   BluetoothAdapterClient::Properties* properties =
 780       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 781           GetProperties(object_path_);
 782
 783   object_path_ = dbus::ObjectPath("");
 784
 785   if (properties->powered.value())
 786     PoweredChanged(false);
 787   if (properties->discoverable.value())
 788     DiscoverableChanged(false);
 789   if (properties->discovering.value())
 790     DiscoveringChanged(false);
 791
 792   // Copy the devices list here and clear the original so that when we
 793   // send DeviceRemoved(), GetDevices() returns no devices.
 794   DevicesMap devices = devices_;
 795   devices_.clear();
 796
 797   for (DevicesMap::iterator iter = devices.begin();
 798        iter != devices.end(); ++iter) {
 799     FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 800                       DeviceRemoved(this, iter->second));
 801     delete iter->second;
 802   }
 803
 804   PresentChanged(false);
 805 }
 806
 807 void BluetoothAdapterChromeOS::PoweredChanged(bool powered) {
 808   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 809                     AdapterPoweredChanged(this, powered));
 810 }
 811
 812 void BluetoothAdapterChromeOS::DiscoverableChanged(bool discoverable) {
 813   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 814                     AdapterDiscoverableChanged(this, discoverable));
 815 }
 816
 817 void BluetoothAdapterChromeOS::DiscoveringChanged(
 818     bool discovering) {
 819   // If the adapter stopped discovery due to a reason other than a request by
 820   // us, reset the count to 0.
 821   VLOG(1) << "Discovering changed: " << discovering;
 822   if (!discovering && !discovery_request_pending_
 823       && num_discovery_sessions_ > 0) {
 824     VLOG(1) << "Marking sessions as inactive.";
 825     num_discovery_sessions_ = 0;
 826     MarkDiscoverySessionsAsInactive();
 827   }
 828   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 829                     AdapterDiscoveringChanged(this, discovering));
 830 }
 831
 832 void BluetoothAdapterChromeOS::PresentChanged(bool present) {
 833   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 834                     AdapterPresentChanged(this, present));
 835 }
 836
 837 void BluetoothAdapterChromeOS::NotifyDeviceChanged(
 838     BluetoothDeviceChromeOS* device) {
 839   DCHECK(device->adapter_ == this);
 840
 841   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 842                     DeviceChanged(this, device));
 843 }
 844
 845 void BluetoothAdapterChromeOS::NotifyGattServiceAdded(
 846     BluetoothRemoteGattServiceChromeOS* service) {
 847   DCHECK_EQ(service->GetAdapter(), this);
 848   DCHECK_EQ(
 849       static_cast<BluetoothDeviceChromeOS*>(service->GetDevice())->adapter_,
 850       this);
 851
 852   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 853                     observers_,
 854                     GattServiceAdded(this, service->GetDevice(), service));
 855 }
 856
 857 void BluetoothAdapterChromeOS::NotifyGattServiceRemoved(
 858     BluetoothRemoteGattServiceChromeOS* service) {
 859   DCHECK_EQ(service->GetAdapter(), this);
 860   DCHECK_EQ(
 861       static_cast<BluetoothDeviceChromeOS*>(service->GetDevice())->adapter_,
 862       this);
 863
 864   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 865                     observers_,
 866                     GattServiceRemoved(this, service->GetDevice(), service));
 867 }
 868
 869 void BluetoothAdapterChromeOS::NotifyGattServiceChanged(
 870     BluetoothRemoteGattServiceChromeOS* service) {
 871   DCHECK_EQ(service->GetAdapter(), this);
 872
 873   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 874                     observers_,
 875                     GattServiceChanged(this, service));
 876 }
 877
 878 void BluetoothAdapterChromeOS::NotifyGattDiscoveryComplete(
 879     BluetoothRemoteGattServiceChromeOS* service) {
 880   DCHECK_EQ(service->GetAdapter(), this);
 881
 882   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 883                     observers_,
 884                     GattDiscoveryCompleteForService(this, service));
 885 }
 886
 887 void BluetoothAdapterChromeOS::NotifyGattCharacteristicAdded(
 888     BluetoothRemoteGattCharacteristicChromeOS* characteristic) {
 889   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 890                 characteristic->GetService())->GetAdapter(),
 891             this);
 892
 893   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 894                     observers_,
 895                     GattCharacteristicAdded(this, characteristic));
 896 }
 897
 898 void BluetoothAdapterChromeOS::NotifyGattCharacteristicRemoved(
 899     BluetoothRemoteGattCharacteristicChromeOS* characteristic) {
 900   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 901                 characteristic->GetService())->GetAdapter(),
 902             this);
 903
 904   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 905                     observers_,
 906                     GattCharacteristicRemoved(this, characteristic));
 907 }
 908
 909 void BluetoothAdapterChromeOS::NotifyGattDescriptorAdded(
 910     BluetoothRemoteGattDescriptorChromeOS* descriptor) {
 911   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 912                 descriptor->GetCharacteristic()->GetService())->GetAdapter(),
 913             this);
 914
 915   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 916                     observers_,
 917                     GattDescriptorAdded(this, descriptor));
 918 }
 919
 920 void BluetoothAdapterChromeOS::NotifyGattDescriptorRemoved(
 921     BluetoothRemoteGattDescriptorChromeOS* descriptor) {
 922   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 923                 descriptor->GetCharacteristic()->GetService())->GetAdapter(),
 924             this);
 925
 926   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 927                     observers_,
 928                     GattDescriptorRemoved(this, descriptor));
 929 }
 930
 931 void BluetoothAdapterChromeOS::NotifyGattCharacteristicValueChanged(
 932     BluetoothRemoteGattCharacteristicChromeOS* characteristic,
 933     const std::vector<uint8>& value) {
 934   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 935                 characteristic->GetService())->GetAdapter(),
 936             this);
 937
 938   FOR_EACH_OBSERVER(
 939       BluetoothAdapter::Observer,
 940       observers_,
 941       GattCharacteristicValueChanged(this, characteristic, value));
 942 }
 943
 944 void BluetoothAdapterChromeOS::NotifyGattDescriptorValueChanged(
 945     BluetoothRemoteGattDescriptorChromeOS* descriptor,
 946     const std::vector<uint8>& value) {
 947   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 948                 descriptor->GetCharacteristic()->GetService())->GetAdapter(),
 949             this);
 950
 951   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 952                     observers_,
 953                     GattDescriptorValueChanged(this, descriptor, value));
 954 }
 955
 956 void BluetoothAdapterChromeOS::UseProfile(
 957     const BluetoothUUID& uuid,
 958     const dbus::ObjectPath& device_path,
 959     const BluetoothProfileManagerClient::Options& options,
 960     BluetoothProfileServiceProvider::Delegate* delegate,
 961     const ProfileRegisteredCallback& success_callback,
 962     const ErrorCompletionCallback& error_callback) {
 963   DCHECK(delegate);
 964
 965   if (!IsPresent()) {
 966     VLOG(2) << "Adapter not present, erroring out";
 967     error_callback.Run("Adapter not present");
 968     return;
 969   }
 970
 971   if (profiles_.find(uuid) != profiles_.end()) {
 972     // TODO(jamuraa) check that the options are the same and error when they are
 973     // not.
 974     SetProfileDelegate(uuid, device_path, delegate, success_callback,
 975                        error_callback);
 976     return;
 977   }
 978
 979   if (profile_queues_.find(uuid) == profile_queues_.end()) {
 980     BluetoothAdapterProfileChromeOS::Register(
 981         uuid, options,
 982         base::Bind(&BluetoothAdapterChromeOS::OnRegisterProfile, this, uuid),
 983         base::Bind(&BluetoothAdapterChromeOS::OnRegisterProfileError, this,
 984                    uuid));
 985
 986     profile_queues_[uuid] = new std::vector<RegisterProfileCompletionPair>();
 987   }
 988
 989   profile_queues_[uuid]->push_back(std::make_pair(
 990       base::Bind(&BluetoothAdapterChromeOS::SetProfileDelegate, this, uuid,
 991                  device_path, delegate, success_callback, error_callback),
 992       error_callback));
 993 }
 994
 995 void BluetoothAdapterChromeOS::ReleaseProfile(
 996     const dbus::ObjectPath& device_path,
 997     BluetoothAdapterProfileChromeOS* profile) {
 998   VLOG(2) << "Releasing Profile: " << profile->uuid().canonical_value()
 999           << " from " << device_path.value();
1000   profile->RemoveDelegate(
1001       device_path, base::Bind(&BluetoothAdapterChromeOS::RemoveProfile,
1002                               weak_ptr_factory_.GetWeakPtr(), profile->uuid()));
1003 }
1004
1005 void BluetoothAdapterChromeOS::RemoveProfile(const BluetoothUUID& uuid) {
1006   VLOG(2) << "Remove Profile: " << uuid.canonical_value();
1007
1008   if (profiles_.find(uuid) != profiles_.end()) {
1009     delete profiles_[uuid];
1010     profiles_.erase(uuid);
1011   }
1012 }
1013
1014 void BluetoothAdapterChromeOS::OnRegisterProfile(
1015     const BluetoothUUID& uuid,
1016     scoped_ptr<BluetoothAdapterProfileChromeOS> profile) {
1017   profiles_[uuid] = profile.release();
1018
1019   if (profile_queues_.find(uuid) == profile_queues_.end())
1020     return;
1021
1022   for (auto& it : *profile_queues_[uuid])
1023     it.first.Run();
1024   delete profile_queues_[uuid];
1025   profile_queues_.erase(uuid);
1026 }
1027
1028 void BluetoothAdapterChromeOS::SetProfileDelegate(
1029     const BluetoothUUID& uuid,
1030     const dbus::ObjectPath& device_path,
1031     BluetoothProfileServiceProvider::Delegate* delegate,
1032     const ProfileRegisteredCallback& success_callback,
1033     const ErrorCompletionCallback& error_callback) {
1034   if (profiles_.find(uuid) == profiles_.end()) {
1035     error_callback.Run("Cannot find profile!");
1036     return;
1037   }
1038
1039   if (profiles_[uuid]->SetDelegate(device_path, delegate)) {
1040     success_callback.Run(profiles_[uuid]);
1041     return;
1042   }
1043   // Already set
1044   error_callback.Run(bluetooth_agent_manager::kErrorAlreadyExists);
1045 }
1046
1047 void BluetoothAdapterChromeOS::OnRegisterProfileError(
1048     const BluetoothUUID& uuid,
1049     const std::string& error_name,
1050     const std::string& error_message) {
1051   VLOG(2) << object_path_.value() << ": Failed to register profile: "
1052           << error_name << ": " << error_message;
1053   if (profile_queues_.find(uuid) == profile_queues_.end())
1054     return;
1055
1056   for (auto& it : *profile_queues_[uuid])
1057     it.second.Run(error_message);
1058
1059   delete profile_queues_[uuid];
1060   profile_queues_.erase(uuid);
1061 }
1062
1063 void BluetoothAdapterChromeOS::OnSetDiscoverable(
1064     const base::Closure& callback,
1065     const ErrorCallback& error_callback,
1066     bool success) {
1067   if (!IsPresent()) {
1068     error_callback.Run();
1069     return;
1070   }
1071
1072   // Set the discoverable_timeout property to zero so the adapter remains
1073   // discoverable forever.
1074   DBusThreadManager::Get()->GetBluetoothAdapterClient()->
1075       GetProperties(object_path_)->discoverable_timeout.Set(
1076           0,
1077           base::Bind(&BluetoothAdapterChromeOS::OnPropertyChangeCompleted,
1078                      weak_ptr_factory_.GetWeakPtr(),
1079                      callback,
1080                      error_callback));
1081 }
1082
1083 void BluetoothAdapterChromeOS::OnPropertyChangeCompleted(
1084     const base::Closure& callback,
1085     const ErrorCallback& error_callback,
1086     bool success) {
1087   if (IsPresent() && success)
1088     callback.Run();
1089   else
1090     error_callback.Run();
1091 }
1092
1093 void BluetoothAdapterChromeOS::AddDiscoverySession(
1094     const base::Closure& callback,
1095     const ErrorCallback& error_callback) {
1096   if (!IsPresent()) {
1097     error_callback.Run();
1098     return;
1099   }
1100   VLOG(1) << __func__;
1101   if (discovery_request_pending_) {
1102     // The pending request is either to stop a previous session or to start a
1103     // new one. Either way, queue this one.
1104     DCHECK(num_discovery_sessions_ == 1 || num_discovery_sessions_ == 0);
1105     VLOG(1) << "Pending request to start/stop device discovery. Queueing "
1106             << "request to start a new discovery session.";
1107     discovery_request_queue_.push(std::make_pair(callback, error_callback));
1108     return;
1109   }
1110
1111   // The adapter is already discovering.
1112   if (num_discovery_sessions_ > 0) {
1113     DCHECK(IsDiscovering());
1114     DCHECK(!discovery_request_pending_);
1115     num_discovery_sessions_++;
1116     callback.Run();
1117     return;
1118   }
1119
1120   // There are no active discovery sessions.
1121   DCHECK_EQ(num_discovery_sessions_, 0);
1122
1123   // This is the first request to start device discovery.
1124   discovery_request_pending_ = true;
1125   DBusThreadManager::Get()->GetBluetoothAdapterClient()->StartDiscovery(
1126       object_path_,
1127       base::Bind(&BluetoothAdapterChromeOS::OnStartDiscovery,
1128                  weak_ptr_factory_.GetWeakPtr(), callback, error_callback),
1129       base::Bind(&BluetoothAdapterChromeOS::OnStartDiscoveryError,
1130                  weak_ptr_factory_.GetWeakPtr(), callback, error_callback));
1131 }
1132
1133 void BluetoothAdapterChromeOS::RemoveDiscoverySession(
1134     const base::Closure& callback,
1135     const ErrorCallback& error_callback) {
1136   if (!IsPresent()) {
1137     error_callback.Run();
1138     return;
1139   }
1140
1141   VLOG(1) << __func__;
1142   // There are active sessions other than the one currently being removed.
1143   if (num_discovery_sessions_ > 1) {
1144     DCHECK(IsDiscovering());
1145     DCHECK(!discovery_request_pending_);
1146     num_discovery_sessions_--;
1147     callback.Run();
1148     return;
1149   }
1150
1151   // If there is a pending request to BlueZ, then queue this request.
1152   if (discovery_request_pending_) {
1153     VLOG(1) << "Pending request to start/stop device discovery. Queueing "
1154             << "request to stop discovery session.";
1155     error_callback.Run();
1156     return;
1157   }
1158
1159   // There are no active sessions. Return error.
1160   if (num_discovery_sessions_ == 0) {
1161     // TODO(armansito): This should never happen once we have the
1162     // DiscoverySession API. Replace this case with an assert once it's
1163     // the deprecated methods have been removed. (See crbug.com/3445008).
1164     VLOG(1) << "No active discovery sessions. Returning error.";
1165     error_callback.Run();
1166     return;
1167   }
1168
1169   // There is exactly one active discovery session. Request BlueZ to stop
1170   // discovery.
1171   DCHECK_EQ(num_discovery_sessions_, 1);
1172   discovery_request_pending_ = true;
1173   DBusThreadManager::Get()->GetBluetoothAdapterClient()->
1174       StopDiscovery(
1175           object_path_,
1176           base::Bind(&BluetoothAdapterChromeOS::OnStopDiscovery,
1177                      weak_ptr_factory_.GetWeakPtr(),
1178                      callback),
1179           base::Bind(&BluetoothAdapterChromeOS::OnStopDiscoveryError,
1180                      weak_ptr_factory_.GetWeakPtr(),
1181                      error_callback));
1182 }
1183
1184 void BluetoothAdapterChromeOS::OnStartDiscovery(
1185     const base::Closure& callback,
1186     const ErrorCallback& error_callback) {
1187   // Report success on the original request and increment the count.
1188   VLOG(1) << __func__;
1189   DCHECK(discovery_request_pending_);
1190   DCHECK_EQ(num_discovery_sessions_, 0);
1191   discovery_request_pending_ = false;
1192   num_discovery_sessions_++;
1193   if (IsPresent())
1194     callback.Run();
1195   else
1196     error_callback.Run();
1197
1198   // Try to add a new discovery session for each queued request.
1199   ProcessQueuedDiscoveryRequests();
1200 }
1201
1202 void BluetoothAdapterChromeOS::OnStartDiscoveryError(
1203     const base::Closure& callback,
1204     const ErrorCallback& error_callback,
1205     const std::string& error_name,
1206     const std::string& error_message) {
1207   LOG(WARNING) << object_path_.value() << ": Failed to start discovery: "
1208                << error_name << ": " << error_message;
1209
1210   // Failed to start discovery. This can only happen if the count is at 0.
1211   DCHECK_EQ(num_discovery_sessions_, 0);
1212   DCHECK(discovery_request_pending_);
1213   discovery_request_pending_ = false;
1214
1215   // Discovery request may fail if discovery was previously initiated by Chrome,
1216   // but the session were invalidated due to the discovery state unexpectedly
1217   // changing to false and then back to true. In this case, report success.
1218   if (IsPresent() && error_name == bluetooth_device::kErrorInProgress &&
1219       IsDiscovering()) {
1220     VLOG(1) << "Discovery previously initiated. Reporting success.";
1221     num_discovery_sessions_++;
1222     callback.Run();
1223   } else {
1224     error_callback.Run();
1225   }
1226
1227   // Try to add a new discovery session for each queued request.
1228   ProcessQueuedDiscoveryRequests();
1229 }
1230
1231 void BluetoothAdapterChromeOS::OnStopDiscovery(const base::Closure& callback) {
1232   // Report success on the original request and decrement the count.
1233   VLOG(1) << __func__;
1234   DCHECK(discovery_request_pending_);
1235   DCHECK_EQ(num_discovery_sessions_, 1);
1236   discovery_request_pending_ = false;
1237   num_discovery_sessions_--;
1238   callback.Run();
1239
1240   // Try to add a new discovery session for each queued request.
1241   ProcessQueuedDiscoveryRequests();
1242 }
1243
1244 void BluetoothAdapterChromeOS::OnStopDiscoveryError(
1245     const ErrorCallback& error_callback,
1246     const std::string& error_name,
1247     const std::string& error_message) {
1248   LOG(WARNING) << object_path_.value() << ": Failed to stop discovery: "
1249                << error_name << ": " << error_message;
1250
1251   // Failed to stop discovery. This can only happen if the count is at 1.
1252   DCHECK(discovery_request_pending_);
1253   DCHECK_EQ(num_discovery_sessions_, 1);
1254   discovery_request_pending_ = false;
1255   error_callback.Run();
1256
1257   // Try to add a new discovery session for each queued request.
1258   ProcessQueuedDiscoveryRequests();
1259 }
1260
1261 void BluetoothAdapterChromeOS::ProcessQueuedDiscoveryRequests() {
1262   while (!discovery_request_queue_.empty()) {
1263     VLOG(1) << "Process queued discovery request.";
1264     DiscoveryCallbackPair callbacks = discovery_request_queue_.front();
1265     discovery_request_queue_.pop();
1266     AddDiscoverySession(callbacks.first, callbacks.second);
1267
1268     // If the queued request resulted in a pending call, then let it
1269     // asynchonously process the remaining queued requests once the pending
1270     // call returns.
1271     if (discovery_request_pending_)
1272       return;
1273   }
1274 }
1275
1276 }  // namespace chromeos