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_advertisement_chromeos.h"
  25 #include "device/bluetooth/bluetooth_audio_sink_chromeos.h"
  26 #include "device/bluetooth/bluetooth_device.h"
  27 #include "device/bluetooth/bluetooth_device_chromeos.h"
  28 #include "device/bluetooth/bluetooth_pairing_chromeos.h"
  29 #include "device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.h"
  30 #include "device/bluetooth/bluetooth_remote_gatt_descriptor_chromeos.h"
  31 #include "device/bluetooth/bluetooth_remote_gatt_service_chromeos.h"
  32 #include "device/bluetooth/bluetooth_socket_chromeos.h"
  33 #include "device/bluetooth/bluetooth_socket_thread.h"
  34 #include "device/bluetooth/bluetooth_uuid.h"
  35 #include "third_party/cros_system_api/dbus/service_constants.h"
  36
  37 using device::BluetoothAdapter;
  38 using device::BluetoothAudioSink;
  39 using device::BluetoothDevice;
  40 using device::BluetoothDiscoveryFilter;
  41 using device::BluetoothSocket;
  42 using device::BluetoothUUID;
  43
  44 namespace {
  45
  46 // The agent path is relatively meaningless since BlueZ only permits one to
  47 // exist per D-Bus connection, it just has to be unique within Chromium.
  48 const char kAgentPath[] = "/org/chromium/bluetooth_agent";
  49
  50 void OnUnregisterAgentError(const std::string& error_name,
  51                             const std::string& error_message) {
  52   // It's okay if the agent didn't exist, it means we never saw an adapter.
  53   if (error_name == bluetooth_agent_manager::kErrorDoesNotExist)
  54     return;
  55
  56   LOG(WARNING) << "Failed to unregister pairing agent: "
  57                << error_name << ": " << error_message;
  58 }
  59
  60 }  // namespace
  61
  62 namespace device {
  63
  64 // static
  65 base::WeakPtr<BluetoothAdapter> BluetoothAdapter::CreateAdapter(
  66     const InitCallback& init_callback) {
  67   return chromeos::BluetoothAdapterChromeOS::CreateAdapter();
  68 }
  69
  70 }  // namespace device
  71
  72 namespace chromeos {
  73
  74 // static
  75 base::WeakPtr<BluetoothAdapter> BluetoothAdapterChromeOS::CreateAdapter() {
  76   BluetoothAdapterChromeOS* adapter = new BluetoothAdapterChromeOS();
  77   return adapter->weak_ptr_factory_.GetWeakPtr();
  78 }
  79
  80 void BluetoothAdapterChromeOS::Shutdown() {
  81   if (dbus_is_shutdown_)
  82     return;
  83   DCHECK(DBusThreadManager::IsInitialized())
  84       << "Call BluetoothAdapterFactory::Shutdown() before "
  85          "DBusThreadManager::Shutdown().";
  86
  87   if (IsPresent())
  88     RemoveAdapter();  // Also deletes devices_.
  89   DCHECK(devices_.empty());
  90   // profiles_ is empty because all BluetoothSockets have been notified
  91   // that this adapter is disappearing.
  92   DCHECK(profiles_.empty());
  93
  94   for (auto& it : profile_queues_)
  95     delete it.second;
  96   profile_queues_.clear();
  97
  98   DBusThreadManager::Get()->GetBluetoothAdapterClient()->RemoveObserver(this);
  99   DBusThreadManager::Get()->GetBluetoothDeviceClient()->RemoveObserver(this);
 100   DBusThreadManager::Get()->GetBluetoothInputClient()->RemoveObserver(this);
 101
 102   VLOG(1) << "Unregistering pairing agent";
 103   DBusThreadManager::Get()->GetBluetoothAgentManagerClient()->UnregisterAgent(
 104       dbus::ObjectPath(kAgentPath), base::Bind(&base::DoNothing),
 105       base::Bind(&OnUnregisterAgentError));
 106
 107   agent_.reset();
 108   dbus_is_shutdown_ = true;
 109 }
 110
 111 BluetoothAdapterChromeOS::BluetoothAdapterChromeOS()
 112     : dbus_is_shutdown_(false),
 113       num_discovery_sessions_(0),
 114       discovery_request_pending_(false),
 115       weak_ptr_factory_(this) {
 116   ui_task_runner_ = base::ThreadTaskRunnerHandle::Get();
 117   socket_thread_ = device::BluetoothSocketThread::Get();
 118
 119   DBusThreadManager::Get()->GetBluetoothAdapterClient()->AddObserver(this);
 120   DBusThreadManager::Get()->GetBluetoothDeviceClient()->AddObserver(this);
 121   DBusThreadManager::Get()->GetBluetoothInputClient()->AddObserver(this);
 122
 123   // Register the pairing agent.
 124   dbus::Bus* system_bus = DBusThreadManager::Get()->GetSystemBus();
 125   agent_.reset(BluetoothAgentServiceProvider::Create(
 126       system_bus, dbus::ObjectPath(kAgentPath), this));
 127   DCHECK(agent_.get());
 128
 129   std::vector<dbus::ObjectPath> object_paths =
 130       DBusThreadManager::Get()->GetBluetoothAdapterClient()->GetAdapters();
 131
 132   if (!object_paths.empty()) {
 133     VLOG(1) << object_paths.size() << " Bluetooth adapter(s) available.";
 134     SetAdapter(object_paths[0]);
 135   }
 136 }
 137
 138 BluetoothAdapterChromeOS::~BluetoothAdapterChromeOS() {
 139   Shutdown();
 140 }
 141
 142 std::string BluetoothAdapterChromeOS::GetAddress() const {
 143   if (!IsPresent())
 144     return std::string();
 145
 146   BluetoothAdapterClient::Properties* properties =
 147       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 148           GetProperties(object_path_);
 149   DCHECK(properties);
 150
 151   return BluetoothDevice::CanonicalizeAddress(properties->address.value());
 152 }
 153
 154 std::string BluetoothAdapterChromeOS::GetName() const {
 155   if (!IsPresent())
 156     return std::string();
 157
 158   BluetoothAdapterClient::Properties* properties =
 159       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 160           GetProperties(object_path_);
 161   DCHECK(properties);
 162
 163   return properties->alias.value();
 164 }
 165
 166 void BluetoothAdapterChromeOS::SetName(const std::string& name,
 167                                        const base::Closure& callback,
 168                                        const ErrorCallback& error_callback) {
 169   if (!IsPresent()) {
 170     error_callback.Run();
 171     return;
 172   }
 173
 174   DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 175       GetProperties(object_path_)->alias.Set(
 176           name,
 177           base::Bind(&BluetoothAdapterChromeOS::OnPropertyChangeCompleted,
 178                      weak_ptr_factory_.GetWeakPtr(),
 179                      callback,
 180                      error_callback));
 181 }
 182
 183 bool BluetoothAdapterChromeOS::IsInitialized() const {
 184   return true;
 185 }
 186
 187 bool BluetoothAdapterChromeOS::IsPresent() const {
 188   return !dbus_is_shutdown_ && !object_path_.value().empty();
 189 }
 190
 191 bool BluetoothAdapterChromeOS::IsPowered() const {
 192   if (!IsPresent())
 193     return false;
 194
 195   BluetoothAdapterClient::Properties* properties =
 196       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 197           GetProperties(object_path_);
 198
 199   return properties->powered.value();
 200 }
 201
 202 void BluetoothAdapterChromeOS::SetPowered(
 203     bool powered,
 204     const base::Closure& callback,
 205     const ErrorCallback& error_callback) {
 206   if (!IsPresent()) {
 207     error_callback.Run();
 208     return;
 209   }
 210
 211   DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 212       GetProperties(object_path_)->powered.Set(
 213           powered,
 214           base::Bind(&BluetoothAdapterChromeOS::OnPropertyChangeCompleted,
 215                      weak_ptr_factory_.GetWeakPtr(),
 216                      callback,
 217                      error_callback));
 218 }
 219
 220 bool BluetoothAdapterChromeOS::IsDiscoverable() const {
 221   if (!IsPresent())
 222     return false;
 223
 224   BluetoothAdapterClient::Properties* properties =
 225       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 226           GetProperties(object_path_);
 227
 228   return properties->discoverable.value();
 229 }
 230
 231 void BluetoothAdapterChromeOS::SetDiscoverable(
 232     bool discoverable,
 233     const base::Closure& callback,
 234     const ErrorCallback& error_callback) {
 235   if (!IsPresent()) {
 236     error_callback.Run();
 237     return;
 238   }
 239
 240   DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 241       GetProperties(object_path_)->discoverable.Set(
 242           discoverable,
 243           base::Bind(&BluetoothAdapterChromeOS::OnSetDiscoverable,
 244                      weak_ptr_factory_.GetWeakPtr(),
 245                      callback,
 246                      error_callback));
 247 }
 248
 249 bool BluetoothAdapterChromeOS::IsDiscovering() const {
 250   if (!IsPresent())
 251     return false;
 252
 253   BluetoothAdapterClient::Properties* properties =
 254       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 255           GetProperties(object_path_);
 256
 257   return properties->discovering.value();
 258 }
 259
 260 void BluetoothAdapterChromeOS::CreateRfcommService(
 261     const BluetoothUUID& uuid,
 262     const ServiceOptions& options,
 263     const CreateServiceCallback& callback,
 264     const CreateServiceErrorCallback& error_callback) {
 265   DCHECK(!dbus_is_shutdown_);
 266   VLOG(1) << object_path_.value() << ": Creating RFCOMM service: "
 267           << uuid.canonical_value();
 268   scoped_refptr<BluetoothSocketChromeOS> socket =
 269       BluetoothSocketChromeOS::CreateBluetoothSocket(
 270           ui_task_runner_, socket_thread_);
 271   socket->Listen(this,
 272                  BluetoothSocketChromeOS::kRfcomm,
 273                  uuid,
 274                  options,
 275                  base::Bind(callback, socket),
 276                  error_callback);
 277 }
 278
 279 void BluetoothAdapterChromeOS::CreateL2capService(
 280     const BluetoothUUID& uuid,
 281     const ServiceOptions& options,
 282     const CreateServiceCallback& callback,
 283     const CreateServiceErrorCallback& error_callback) {
 284   DCHECK(!dbus_is_shutdown_);
 285   VLOG(1) << object_path_.value() << ": Creating L2CAP service: "
 286           << uuid.canonical_value();
 287   scoped_refptr<BluetoothSocketChromeOS> socket =
 288       BluetoothSocketChromeOS::CreateBluetoothSocket(
 289           ui_task_runner_, socket_thread_);
 290   socket->Listen(this,
 291                  BluetoothSocketChromeOS::kL2cap,
 292                  uuid,
 293                  options,
 294                  base::Bind(callback, socket),
 295                  error_callback);
 296 }
 297
 298 void BluetoothAdapterChromeOS::RegisterAudioSink(
 299     const BluetoothAudioSink::Options& options,
 300     const device::BluetoothAdapter::AcquiredCallback& callback,
 301     const BluetoothAudioSink::ErrorCallback& error_callback) {
 302   VLOG(1) << "Registering audio sink";
 303   if (!this->IsPresent()) {
 304     error_callback.Run(BluetoothAudioSink::ERROR_INVALID_ADAPTER);
 305     return;
 306   }
 307   scoped_refptr<BluetoothAudioSinkChromeOS> audio_sink(
 308       new BluetoothAudioSinkChromeOS(this));
 309   audio_sink->Register(
 310       options, base::Bind(&BluetoothAdapterChromeOS::OnRegisterAudioSink,
 311                           weak_ptr_factory_.GetWeakPtr(), callback,
 312                           error_callback, audio_sink),
 313       error_callback);
 314 }
 315
 316 void BluetoothAdapterChromeOS::RegisterAdvertisement(
 317     scoped_ptr<device::BluetoothAdvertisement::Data> advertisement_data,
 318     const CreateAdvertisementCallback& callback,
 319     const CreateAdvertisementErrorCallback& error_callback) {
 320   scoped_refptr<BluetoothAdvertisementChromeOS> advertisement(
 321       new BluetoothAdvertisementChromeOS(advertisement_data.Pass(), this));
 322   advertisement->Register(base::Bind(callback, advertisement), error_callback);
 323 }
 324
 325 void BluetoothAdapterChromeOS::RemovePairingDelegateInternal(
 326     BluetoothDevice::PairingDelegate* pairing_delegate) {
 327   // Check if any device is using the pairing delegate.
 328   // If so, clear the pairing context which will make any responses no-ops.
 329   for (DevicesMap::iterator iter = devices_.begin();
 330        iter != devices_.end(); ++iter) {
 331     BluetoothDeviceChromeOS* device_chromeos =
 332         static_cast<BluetoothDeviceChromeOS*>(iter->second);
 333
 334     BluetoothPairingChromeOS* pairing = device_chromeos->GetPairing();
 335     if (pairing && pairing->GetPairingDelegate() == pairing_delegate)
 336       device_chromeos->EndPairing();
 337   }
 338 }
 339
 340 void BluetoothAdapterChromeOS::AdapterAdded(
 341     const dbus::ObjectPath& object_path) {
 342   // Set the adapter to the newly added adapter only if no adapter is present.
 343   if (!IsPresent())
 344     SetAdapter(object_path);
 345 }
 346
 347 void BluetoothAdapterChromeOS::AdapterRemoved(
 348     const dbus::ObjectPath& object_path) {
 349   if (object_path == object_path_)
 350     RemoveAdapter();
 351 }
 352
 353 void BluetoothAdapterChromeOS::AdapterPropertyChanged(
 354     const dbus::ObjectPath& object_path,
 355     const std::string& property_name) {
 356   if (object_path != object_path_)
 357     return;
 358   DCHECK(IsPresent());
 359
 360   BluetoothAdapterClient::Properties* properties =
 361       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 362           GetProperties(object_path_);
 363
 364   if (property_name == properties->powered.name()) {
 365     PoweredChanged(properties->powered.value());
 366   } else if (property_name == properties->discoverable.name()) {
 367     DiscoverableChanged(properties->discoverable.value());
 368   } else if (property_name == properties->discovering.name()) {
 369     DiscoveringChanged(properties->discovering.value());
 370   }
 371 }
 372
 373 void BluetoothAdapterChromeOS::DeviceAdded(
 374   const dbus::ObjectPath& object_path) {
 375   DCHECK(DBusThreadManager::Get());
 376   BluetoothDeviceClient::Properties* properties =
 377       DBusThreadManager::Get()->GetBluetoothDeviceClient()->
 378           GetProperties(object_path);
 379   if (!properties || properties->adapter.value() != object_path_)
 380     return;
 381   DCHECK(IsPresent());
 382
 383   BluetoothDeviceChromeOS* device_chromeos =
 384       new BluetoothDeviceChromeOS(this,
 385                                   object_path,
 386                                   ui_task_runner_,
 387                                   socket_thread_);
 388   DCHECK(devices_.find(device_chromeos->GetAddress()) == devices_.end());
 389
 390   devices_[device_chromeos->GetAddress()] = device_chromeos;
 391
 392   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 393                     DeviceAdded(this, device_chromeos));
 394 }
 395
 396 void BluetoothAdapterChromeOS::DeviceRemoved(
 397     const dbus::ObjectPath& object_path) {
 398   for (DevicesMap::iterator iter = devices_.begin();
 399        iter != devices_.end(); ++iter) {
 400     BluetoothDeviceChromeOS* device_chromeos =
 401         static_cast<BluetoothDeviceChromeOS*>(iter->second);
 402     if (device_chromeos->object_path() == object_path) {
 403       devices_.erase(iter);
 404
 405       FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 406                         DeviceRemoved(this, device_chromeos));
 407       delete device_chromeos;
 408       return;
 409     }
 410   }
 411 }
 412
 413 void BluetoothAdapterChromeOS::DevicePropertyChanged(
 414     const dbus::ObjectPath& object_path,
 415     const std::string& property_name) {
 416   BluetoothDeviceChromeOS* device_chromeos = GetDeviceWithPath(object_path);
 417   if (!device_chromeos)
 418     return;
 419
 420   BluetoothDeviceClient::Properties* properties =
 421       DBusThreadManager::Get()->GetBluetoothDeviceClient()->
 422           GetProperties(object_path);
 423
 424   if (property_name == properties->bluetooth_class.name() ||
 425       property_name == properties->address.name() ||
 426       property_name == properties->alias.name() ||
 427       property_name == properties->paired.name() ||
 428       property_name == properties->trusted.name() ||
 429       property_name == properties->connected.name() ||
 430       property_name == properties->uuids.name() ||
 431       property_name == properties->rssi.name() ||
 432       property_name == properties->tx_power.name()) {
 433     NotifyDeviceChanged(device_chromeos);
 434   }
 435
 436   // When a device becomes paired, mark it as trusted so that the user does
 437   // not need to approve every incoming connection
 438   if (property_name == properties->paired.name() &&
 439       properties->paired.value() && !properties->trusted.value()) {
 440     device_chromeos->SetTrusted();
 441   }
 442
 443   // UMA connection counting
 444   if (property_name == properties->connected.name()) {
 445     // PlayStation joystick tries to reconnect after disconnection from USB.
 446     // If it is still not trusted, set it, so it becomes available on the
 447     // list of known devices.
 448     if (properties->connected.value() && device_chromeos->IsTrustable() &&
 449         !properties->trusted.value())
 450       device_chromeos->SetTrusted();
 451
 452     int count = 0;
 453
 454     for (DevicesMap::iterator iter = devices_.begin();
 455          iter != devices_.end(); ++iter) {
 456       if (iter->second->IsPaired() && iter->second->IsConnected())
 457         ++count;
 458     }
 459
 460     UMA_HISTOGRAM_COUNTS_100("Bluetooth.ConnectedDeviceCount", count);
 461   }
 462 }
 463
 464 void BluetoothAdapterChromeOS::InputPropertyChanged(
 465     const dbus::ObjectPath& object_path,
 466     const std::string& property_name) {
 467   BluetoothDeviceChromeOS* device_chromeos = GetDeviceWithPath(object_path);
 468   if (!device_chromeos)
 469     return;
 470
 471   BluetoothInputClient::Properties* properties =
 472       DBusThreadManager::Get()->GetBluetoothInputClient()->
 473           GetProperties(object_path);
 474
 475   // Properties structure can be removed, which triggers a change in the
 476   // BluetoothDevice::IsConnectable() property, as does a change in the
 477   // actual reconnect_mode property.
 478   if (!properties || property_name == properties->reconnect_mode.name()) {
 479     NotifyDeviceChanged(device_chromeos);
 480   }
 481 }
 482
 483 void BluetoothAdapterChromeOS::Released() {
 484   VLOG(1) << "Release";
 485   if (!IsPresent())
 486     return;
 487   DCHECK(agent_.get());
 488
 489   // Called after we unregister the pairing agent, e.g. when changing I/O
 490   // capabilities. Nothing much to be done right now.
 491 }
 492
 493 void BluetoothAdapterChromeOS::RequestPinCode(
 494     const dbus::ObjectPath& device_path,
 495     const PinCodeCallback& callback) {
 496   DCHECK(IsPresent());
 497   DCHECK(agent_.get());
 498   VLOG(1) << device_path.value() << ": RequestPinCode";
 499
 500   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 501   if (!pairing) {
 502     callback.Run(REJECTED, "");
 503     return;
 504   }
 505
 506   pairing->RequestPinCode(callback);
 507 }
 508
 509 void BluetoothAdapterChromeOS::DisplayPinCode(
 510     const dbus::ObjectPath& device_path,
 511     const std::string& pincode) {
 512   DCHECK(IsPresent());
 513   DCHECK(agent_.get());
 514   VLOG(1) << device_path.value() << ": DisplayPinCode: " << pincode;
 515
 516   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 517   if (!pairing)
 518     return;
 519
 520   pairing->DisplayPinCode(pincode);
 521 }
 522
 523 void BluetoothAdapterChromeOS::RequestPasskey(
 524     const dbus::ObjectPath& device_path,
 525     const PasskeyCallback& callback) {
 526   DCHECK(IsPresent());
 527   DCHECK(agent_.get());
 528   VLOG(1) << device_path.value() << ": RequestPasskey";
 529
 530   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 531   if (!pairing) {
 532     callback.Run(REJECTED, 0);
 533     return;
 534   }
 535
 536   pairing->RequestPasskey(callback);
 537 }
 538
 539 void BluetoothAdapterChromeOS::DisplayPasskey(
 540     const dbus::ObjectPath& device_path,
 541     uint32 passkey,
 542     uint16 entered) {
 543   DCHECK(IsPresent());
 544   DCHECK(agent_.get());
 545   VLOG(1) << device_path.value() << ": DisplayPasskey: " << passkey
 546           << " (" << entered << " entered)";
 547
 548   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 549   if (!pairing)
 550     return;
 551
 552   if (entered == 0)
 553     pairing->DisplayPasskey(passkey);
 554
 555   pairing->KeysEntered(entered);
 556 }
 557
 558 void BluetoothAdapterChromeOS::RequestConfirmation(
 559     const dbus::ObjectPath& device_path,
 560     uint32 passkey,
 561     const ConfirmationCallback& callback) {
 562   DCHECK(IsPresent());
 563   DCHECK(agent_.get());
 564   VLOG(1) << device_path.value() << ": RequestConfirmation: " << passkey;
 565
 566   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 567   if (!pairing) {
 568     callback.Run(REJECTED);
 569     return;
 570   }
 571
 572   pairing->RequestConfirmation(passkey, callback);
 573 }
 574
 575 void BluetoothAdapterChromeOS::RequestAuthorization(
 576     const dbus::ObjectPath& device_path,
 577     const ConfirmationCallback& callback) {
 578   DCHECK(IsPresent());
 579   DCHECK(agent_.get());
 580   VLOG(1) << device_path.value() << ": RequestAuthorization";
 581
 582   BluetoothPairingChromeOS* pairing = GetPairing(device_path);
 583   if (!pairing) {
 584     callback.Run(REJECTED);
 585     return;
 586   }
 587
 588   pairing->RequestAuthorization(callback);
 589 }
 590
 591 void BluetoothAdapterChromeOS::AuthorizeService(
 592     const dbus::ObjectPath& device_path,
 593     const std::string& uuid,
 594     const ConfirmationCallback& callback) {
 595   DCHECK(IsPresent());
 596   DCHECK(agent_.get());
 597   VLOG(1) << device_path.value() << ": AuthorizeService: " << uuid;
 598
 599   BluetoothDeviceChromeOS* device_chromeos = GetDeviceWithPath(device_path);
 600   if (!device_chromeos) {
 601     callback.Run(CANCELLED);
 602     return;
 603   }
 604
 605   // We always set paired devices to Trusted, so the only reason that this
 606   // method call would ever be called is in the case of a race condition where
 607   // our "Set('Trusted', true)" method call is still pending in the Bluetooth
 608   // daemon because it's busy handling the incoming connection.
 609   if (device_chromeos->IsPaired()) {
 610     callback.Run(SUCCESS);
 611     return;
 612   }
 613
 614   // TODO(keybuk): reject service authorizations when not paired, determine
 615   // whether this is acceptable long-term.
 616   LOG(WARNING) << "Rejecting service connection from unpaired device "
 617                << device_chromeos->GetAddress() << " for UUID " << uuid;
 618   callback.Run(REJECTED);
 619 }
 620
 621 void BluetoothAdapterChromeOS::Cancel() {
 622   DCHECK(IsPresent());
 623   DCHECK(agent_.get());
 624   VLOG(1) << "Cancel";
 625 }
 626
 627 void BluetoothAdapterChromeOS::OnRegisterAgent() {
 628   VLOG(1) << "Pairing agent registered, requesting to be made default";
 629
 630   DBusThreadManager::Get()->GetBluetoothAgentManagerClient()->
 631       RequestDefaultAgent(
 632           dbus::ObjectPath(kAgentPath),
 633           base::Bind(&BluetoothAdapterChromeOS::OnRequestDefaultAgent,
 634                      weak_ptr_factory_.GetWeakPtr()),
 635           base::Bind(&BluetoothAdapterChromeOS::OnRequestDefaultAgentError,
 636                      weak_ptr_factory_.GetWeakPtr()));
 637 }
 638
 639 void BluetoothAdapterChromeOS::OnRegisterAgentError(
 640     const std::string& error_name,
 641     const std::string& error_message) {
 642   // Our agent being already registered isn't an error.
 643   if (error_name == bluetooth_agent_manager::kErrorAlreadyExists)
 644     return;
 645
 646   LOG(WARNING) << ": Failed to register pairing agent: "
 647                << error_name << ": " << error_message;
 648 }
 649
 650 void BluetoothAdapterChromeOS::OnRequestDefaultAgent() {
 651   VLOG(1) << "Pairing agent now default";
 652 }
 653
 654 void BluetoothAdapterChromeOS::OnRequestDefaultAgentError(
 655     const std::string& error_name,
 656     const std::string& error_message) {
 657   LOG(WARNING) << ": Failed to make pairing agent default: "
 658                << error_name << ": " << error_message;
 659 }
 660
 661 void BluetoothAdapterChromeOS::OnRegisterAudioSink(
 662     const device::BluetoothAdapter::AcquiredCallback& callback,
 663     const device::BluetoothAudioSink::ErrorCallback& error_callback,
 664     scoped_refptr<BluetoothAudioSink> audio_sink) {
 665   if (!IsPresent()) {
 666     VLOG(1) << "Failed to register audio sink, adapter not present";
 667     error_callback.Run(BluetoothAudioSink::ERROR_INVALID_ADAPTER);
 668     return;
 669   }
 670   DCHECK(audio_sink.get());
 671   callback.Run(audio_sink);
 672 }
 673
 674 BluetoothDeviceChromeOS*
 675 BluetoothAdapterChromeOS::GetDeviceWithPath(
 676     const dbus::ObjectPath& object_path) {
 677   if (!IsPresent())
 678     return nullptr;
 679
 680   for (DevicesMap::iterator iter = devices_.begin(); iter != devices_.end();
 681        ++iter) {
 682     BluetoothDeviceChromeOS* device_chromeos =
 683         static_cast<BluetoothDeviceChromeOS*>(iter->second);
 684     if (device_chromeos->object_path() == object_path)
 685       return device_chromeos;
 686   }
 687
 688   return nullptr;
 689 }
 690
 691 BluetoothPairingChromeOS* BluetoothAdapterChromeOS::GetPairing(
 692     const dbus::ObjectPath& object_path) {
 693   DCHECK(IsPresent());
 694   BluetoothDeviceChromeOS* device_chromeos = GetDeviceWithPath(object_path);
 695   if (!device_chromeos) {
 696     LOG(WARNING) << "Pairing Agent request for unknown device: "
 697                  << object_path.value();
 698     return nullptr;
 699   }
 700
 701   BluetoothPairingChromeOS* pairing = device_chromeos->GetPairing();
 702   if (pairing)
 703     return pairing;
 704
 705   // The device doesn't have its own pairing context, so this is an incoming
 706   // pairing request that should use our best default delegate (if we have one).
 707   BluetoothDevice::PairingDelegate* pairing_delegate = DefaultPairingDelegate();
 708   if (!pairing_delegate)
 709     return nullptr;
 710
 711   return device_chromeos->BeginPairing(pairing_delegate);
 712 }
 713
 714 void BluetoothAdapterChromeOS::SetAdapter(const dbus::ObjectPath& object_path) {
 715   DCHECK(!IsPresent());
 716   DCHECK(!dbus_is_shutdown_);
 717   object_path_ = object_path;
 718
 719   VLOG(1) << object_path_.value() << ": using adapter.";
 720
 721   VLOG(1) << "Registering pairing agent";
 722   DBusThreadManager::Get()->GetBluetoothAgentManagerClient()->
 723       RegisterAgent(
 724           dbus::ObjectPath(kAgentPath),
 725           bluetooth_agent_manager::kKeyboardDisplayCapability,
 726           base::Bind(&BluetoothAdapterChromeOS::OnRegisterAgent,
 727                      weak_ptr_factory_.GetWeakPtr()),
 728           base::Bind(&BluetoothAdapterChromeOS::OnRegisterAgentError,
 729                      weak_ptr_factory_.GetWeakPtr()));
 730
 731   SetDefaultAdapterName();
 732
 733   BluetoothAdapterClient::Properties* properties =
 734       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 735           GetProperties(object_path_);
 736
 737   PresentChanged(true);
 738
 739   if (properties->powered.value())
 740     PoweredChanged(true);
 741   if (properties->discoverable.value())
 742     DiscoverableChanged(true);
 743   if (properties->discovering.value())
 744     DiscoveringChanged(true);
 745
 746   std::vector<dbus::ObjectPath> device_paths =
 747       DBusThreadManager::Get()->GetBluetoothDeviceClient()->
 748           GetDevicesForAdapter(object_path_);
 749
 750   for (std::vector<dbus::ObjectPath>::iterator iter = device_paths.begin();
 751        iter != device_paths.end(); ++iter) {
 752     DeviceAdded(*iter);
 753   }
 754 }
 755
 756 void BluetoothAdapterChromeOS::SetDefaultAdapterName() {
 757   DCHECK(IsPresent());
 758   std::string board = base::SysInfo::GetLsbReleaseBoard();
 759   std::string alias;
 760   if (board.substr(0, 6) == "stumpy") {
 761     alias = "Chromebox";
 762   } else if (board.substr(0, 4) == "link") {
 763     alias = "Chromebook Pixel";
 764   } else {
 765     alias = "Chromebook";
 766   }
 767
 768   SetName(alias, base::Bind(&base::DoNothing), base::Bind(&base::DoNothing));
 769 }
 770
 771 void BluetoothAdapterChromeOS::RemoveAdapter() {
 772   DCHECK(IsPresent());
 773   VLOG(1) << object_path_.value() << ": adapter removed.";
 774
 775   BluetoothAdapterClient::Properties* properties =
 776       DBusThreadManager::Get()->GetBluetoothAdapterClient()->
 777           GetProperties(object_path_);
 778
 779   object_path_ = dbus::ObjectPath("");
 780
 781   if (properties->powered.value())
 782     PoweredChanged(false);
 783   if (properties->discoverable.value())
 784     DiscoverableChanged(false);
 785   if (properties->discovering.value())
 786     DiscoveringChanged(false);
 787
 788   // Copy the devices list here and clear the original so that when we
 789   // send DeviceRemoved(), GetDevices() returns no devices.
 790   DevicesMap devices = devices_;
 791   devices_.clear();
 792
 793   for (DevicesMap::iterator iter = devices.begin();
 794        iter != devices.end(); ++iter) {
 795     FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 796                       DeviceRemoved(this, iter->second));
 797     delete iter->second;
 798   }
 799
 800   PresentChanged(false);
 801 }
 802
 803 void BluetoothAdapterChromeOS::PoweredChanged(bool powered) {
 804   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 805                     AdapterPoweredChanged(this, powered));
 806 }
 807
 808 void BluetoothAdapterChromeOS::DiscoverableChanged(bool discoverable) {
 809   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 810                     AdapterDiscoverableChanged(this, discoverable));
 811 }
 812
 813 void BluetoothAdapterChromeOS::DiscoveringChanged(
 814     bool discovering) {
 815   // If the adapter stopped discovery due to a reason other than a request by
 816   // us, reset the count to 0.
 817   VLOG(1) << "Discovering changed: " << discovering;
 818   if (!discovering && !discovery_request_pending_ &&
 819       num_discovery_sessions_ > 0) {
 820     VLOG(1) << "Marking sessions as inactive.";
 821     num_discovery_sessions_ = 0;
 822     MarkDiscoverySessionsAsInactive();
 823   }
 824   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 825                     AdapterDiscoveringChanged(this, discovering));
 826 }
 827
 828 void BluetoothAdapterChromeOS::PresentChanged(bool present) {
 829   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 830                     AdapterPresentChanged(this, present));
 831 }
 832
 833 void BluetoothAdapterChromeOS::NotifyDeviceChanged(
 834     BluetoothDeviceChromeOS* device) {
 835   DCHECK(device);
 836   DCHECK(device->adapter_ == this);
 837
 838   FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
 839                     DeviceChanged(this, device));
 840 }
 841
 842 void BluetoothAdapterChromeOS::NotifyGattServiceAdded(
 843     BluetoothRemoteGattServiceChromeOS* service) {
 844   DCHECK_EQ(service->GetAdapter(), this);
 845   DCHECK_EQ(
 846       static_cast<BluetoothDeviceChromeOS*>(service->GetDevice())->adapter_,
 847       this);
 848
 849   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 850                     observers_,
 851                     GattServiceAdded(this, service->GetDevice(), service));
 852 }
 853
 854 void BluetoothAdapterChromeOS::NotifyGattServiceRemoved(
 855     BluetoothRemoteGattServiceChromeOS* service) {
 856   DCHECK_EQ(service->GetAdapter(), this);
 857   DCHECK_EQ(
 858       static_cast<BluetoothDeviceChromeOS*>(service->GetDevice())->adapter_,
 859       this);
 860
 861   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 862                     observers_,
 863                     GattServiceRemoved(this, service->GetDevice(), service));
 864 }
 865
 866 void BluetoothAdapterChromeOS::NotifyGattServiceChanged(
 867     BluetoothRemoteGattServiceChromeOS* service) {
 868   DCHECK_EQ(service->GetAdapter(), this);
 869
 870   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 871                     observers_,
 872                     GattServiceChanged(this, service));
 873 }
 874
 875 void BluetoothAdapterChromeOS::NotifyGattDiscoveryComplete(
 876     BluetoothRemoteGattServiceChromeOS* service) {
 877   DCHECK_EQ(service->GetAdapter(), this);
 878
 879   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 880                     observers_,
 881                     GattDiscoveryCompleteForService(this, service));
 882 }
 883
 884 void BluetoothAdapterChromeOS::NotifyGattCharacteristicAdded(
 885     BluetoothRemoteGattCharacteristicChromeOS* characteristic) {
 886   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 887                 characteristic->GetService())->GetAdapter(),
 888             this);
 889
 890   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 891                     observers_,
 892                     GattCharacteristicAdded(this, characteristic));
 893 }
 894
 895 void BluetoothAdapterChromeOS::NotifyGattCharacteristicRemoved(
 896     BluetoothRemoteGattCharacteristicChromeOS* characteristic) {
 897   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 898                 characteristic->GetService())->GetAdapter(),
 899             this);
 900
 901   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 902                     observers_,
 903                     GattCharacteristicRemoved(this, characteristic));
 904 }
 905
 906 void BluetoothAdapterChromeOS::NotifyGattDescriptorAdded(
 907     BluetoothRemoteGattDescriptorChromeOS* descriptor) {
 908   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 909                 descriptor->GetCharacteristic()->GetService())->GetAdapter(),
 910             this);
 911
 912   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 913                     observers_,
 914                     GattDescriptorAdded(this, descriptor));
 915 }
 916
 917 void BluetoothAdapterChromeOS::NotifyGattDescriptorRemoved(
 918     BluetoothRemoteGattDescriptorChromeOS* descriptor) {
 919   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 920                 descriptor->GetCharacteristic()->GetService())->GetAdapter(),
 921             this);
 922
 923   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 924                     observers_,
 925                     GattDescriptorRemoved(this, descriptor));
 926 }
 927
 928 void BluetoothAdapterChromeOS::NotifyGattCharacteristicValueChanged(
 929     BluetoothRemoteGattCharacteristicChromeOS* characteristic,
 930     const std::vector<uint8>& value) {
 931   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 932                 characteristic->GetService())->GetAdapter(),
 933             this);
 934
 935   FOR_EACH_OBSERVER(
 936       BluetoothAdapter::Observer,
 937       observers_,
 938       GattCharacteristicValueChanged(this, characteristic, value));
 939 }
 940
 941 void BluetoothAdapterChromeOS::NotifyGattDescriptorValueChanged(
 942     BluetoothRemoteGattDescriptorChromeOS* descriptor,
 943     const std::vector<uint8>& value) {
 944   DCHECK_EQ(static_cast<BluetoothRemoteGattServiceChromeOS*>(
 945                 descriptor->GetCharacteristic()->GetService())->GetAdapter(),
 946             this);
 947
 948   FOR_EACH_OBSERVER(BluetoothAdapter::Observer,
 949                     observers_,
 950                     GattDescriptorValueChanged(this, descriptor, value));
 951 }
 952
 953 void BluetoothAdapterChromeOS::UseProfile(
 954     const BluetoothUUID& uuid,
 955     const dbus::ObjectPath& device_path,
 956     const BluetoothProfileManagerClient::Options& options,
 957     BluetoothProfileServiceProvider::Delegate* delegate,
 958     const ProfileRegisteredCallback& success_callback,
 959     const ErrorCompletionCallback& error_callback) {
 960   DCHECK(delegate);
 961
 962   if (!IsPresent()) {
 963     VLOG(2) << "Adapter not present, erroring out";
 964     error_callback.Run("Adapter not present");
 965     return;
 966   }
 967
 968   if (profiles_.find(uuid) != profiles_.end()) {
 969     // TODO(jamuraa) check that the options are the same and error when they are
 970     // not.
 971     SetProfileDelegate(uuid, device_path, delegate, success_callback,
 972                        error_callback);
 973     return;
 974   }
 975
 976   if (profile_queues_.find(uuid) == profile_queues_.end()) {
 977     BluetoothAdapterProfileChromeOS::Register(
 978         uuid, options,
 979         base::Bind(&BluetoothAdapterChromeOS::OnRegisterProfile, this, uuid),
 980         base::Bind(&BluetoothAdapterChromeOS::OnRegisterProfileError, this,
 981                    uuid));
 982
 983     profile_queues_[uuid] = new std::vector<RegisterProfileCompletionPair>();
 984   }
 985
 986   profile_queues_[uuid]->push_back(std::make_pair(
 987       base::Bind(&BluetoothAdapterChromeOS::SetProfileDelegate, this, uuid,
 988                  device_path, delegate, success_callback, error_callback),
 989       error_callback));
 990 }
 991
 992 void BluetoothAdapterChromeOS::ReleaseProfile(
 993     const dbus::ObjectPath& device_path,
 994     BluetoothAdapterProfileChromeOS* profile) {
 995   VLOG(2) << "Releasing Profile: " << profile->uuid().canonical_value()
 996           << " from " << device_path.value();
 997   profile->RemoveDelegate(
 998       device_path, base::Bind(&BluetoothAdapterChromeOS::RemoveProfile,
 999                               weak_ptr_factory_.GetWeakPtr(), profile->uuid()));
1000 }
1001
1002 void BluetoothAdapterChromeOS::RemoveProfile(const BluetoothUUID& uuid) {
1003   VLOG(2) << "Remove Profile: " << uuid.canonical_value();
1004
1005   if (profiles_.find(uuid) != profiles_.end()) {
1006     delete profiles_[uuid];
1007     profiles_.erase(uuid);
1008   }
1009 }
1010
1011 void BluetoothAdapterChromeOS::OnRegisterProfile(
1012     const BluetoothUUID& uuid,
1013     scoped_ptr<BluetoothAdapterProfileChromeOS> profile) {
1014   profiles_[uuid] = profile.release();
1015
1016   if (profile_queues_.find(uuid) == profile_queues_.end())
1017     return;
1018
1019   for (auto& it : *profile_queues_[uuid])
1020     it.first.Run();
1021   delete profile_queues_[uuid];
1022   profile_queues_.erase(uuid);
1023 }
1024
1025 void BluetoothAdapterChromeOS::SetProfileDelegate(
1026     const BluetoothUUID& uuid,
1027     const dbus::ObjectPath& device_path,
1028     BluetoothProfileServiceProvider::Delegate* delegate,
1029     const ProfileRegisteredCallback& success_callback,
1030     const ErrorCompletionCallback& error_callback) {
1031   if (profiles_.find(uuid) == profiles_.end()) {
1032     error_callback.Run("Cannot find profile!");
1033     return;
1034   }
1035
1036   if (profiles_[uuid]->SetDelegate(device_path, delegate)) {
1037     success_callback.Run(profiles_[uuid]);
1038     return;
1039   }
1040   // Already set
1041   error_callback.Run(bluetooth_agent_manager::kErrorAlreadyExists);
1042 }
1043
1044 void BluetoothAdapterChromeOS::OnRegisterProfileError(
1045     const BluetoothUUID& uuid,
1046     const std::string& error_name,
1047     const std::string& error_message) {
1048   VLOG(2) << object_path_.value() << ": Failed to register profile: "
1049           << error_name << ": " << error_message;
1050   if (profile_queues_.find(uuid) == profile_queues_.end())
1051     return;
1052
1053   for (auto& it : *profile_queues_[uuid])
1054     it.second.Run(error_message);
1055
1056   delete profile_queues_[uuid];
1057   profile_queues_.erase(uuid);
1058 }
1059
1060 void BluetoothAdapterChromeOS::OnSetDiscoverable(
1061     const base::Closure& callback,
1062     const ErrorCallback& error_callback,
1063     bool success) {
1064   if (!IsPresent()) {
1065     error_callback.Run();
1066     return;
1067   }
1068
1069   // Set the discoverable_timeout property to zero so the adapter remains
1070   // discoverable forever.
1071   DBusThreadManager::Get()->GetBluetoothAdapterClient()->
1072       GetProperties(object_path_)->discoverable_timeout.Set(
1073           0,
1074           base::Bind(&BluetoothAdapterChromeOS::OnPropertyChangeCompleted,
1075                      weak_ptr_factory_.GetWeakPtr(),
1076                      callback,
1077                      error_callback));
1078 }
1079
1080 void BluetoothAdapterChromeOS::OnPropertyChangeCompleted(
1081     const base::Closure& callback,
1082     const ErrorCallback& error_callback,
1083     bool success) {
1084   if (IsPresent() && success) {
1085     callback.Run();
1086   } else {
1087     error_callback.Run();
1088   }
1089 }
1090
1091 void BluetoothAdapterChromeOS::AddDiscoverySession(
1092     BluetoothDiscoveryFilter* discovery_filter,
1093     const base::Closure& callback,
1094     const ErrorCallback& error_callback) {
1095   if (!IsPresent()) {
1096     error_callback.Run();
1097     return;
1098   }
1099   VLOG(1) << __func__;
1100   if (discovery_request_pending_) {
1101     // The pending request is either to stop a previous session or to start a
1102     // new one. Either way, queue this one.
1103     DCHECK(num_discovery_sessions_ == 1 || num_discovery_sessions_ == 0);
1104     VLOG(1) << "Pending request to start/stop device discovery. Queueing "
1105             << "request to start a new discovery session.";
1106     discovery_request_queue_.push(
1107         std::make_tuple(discovery_filter, 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     SetDiscoveryFilter(BluetoothDiscoveryFilter::Merge(
1117                            GetMergedDiscoveryFilter().get(), discovery_filter),
1118                        callback, error_callback);
1119     return;
1120   }
1121
1122   // There are no active discovery sessions.
1123   DCHECK_EQ(num_discovery_sessions_, 0);
1124
1125   if (discovery_filter) {
1126     discovery_request_pending_ = true;
1127
1128     scoped_ptr<BluetoothDiscoveryFilter> df(new BluetoothDiscoveryFilter(
1129         BluetoothDiscoveryFilter::Transport::TRANSPORT_DUAL));
1130     df->CopyFrom(*discovery_filter);
1131     SetDiscoveryFilter(
1132         df.Pass(),
1133         base::Bind(&BluetoothAdapterChromeOS::OnPreSetDiscoveryFilter,
1134                    weak_ptr_factory_.GetWeakPtr(), callback, error_callback),
1135         base::Bind(&BluetoothAdapterChromeOS::OnPreSetDiscoveryFilterError,
1136                    weak_ptr_factory_.GetWeakPtr(), callback, error_callback));
1137     return;
1138   } else {
1139     current_filter_.reset();
1140   }
1141
1142   // This is the first request to start device discovery.
1143   discovery_request_pending_ = true;
1144   DBusThreadManager::Get()->GetBluetoothAdapterClient()->StartDiscovery(
1145       object_path_,
1146       base::Bind(&BluetoothAdapterChromeOS::OnStartDiscovery,
1147                  weak_ptr_factory_.GetWeakPtr(), callback, error_callback),
1148       base::Bind(&BluetoothAdapterChromeOS::OnStartDiscoveryError,
1149                  weak_ptr_factory_.GetWeakPtr(), callback, error_callback));
1150 }
1151
1152 void BluetoothAdapterChromeOS::RemoveDiscoverySession(
1153     BluetoothDiscoveryFilter* discovery_filter,
1154     const base::Closure& callback,
1155     const ErrorCallback& error_callback) {
1156   if (!IsPresent()) {
1157     error_callback.Run();
1158     return;
1159   }
1160
1161   VLOG(1) << __func__;
1162   // There are active sessions other than the one currently being removed.
1163   if (num_discovery_sessions_ > 1) {
1164     DCHECK(IsDiscovering());
1165     DCHECK(!discovery_request_pending_);
1166     num_discovery_sessions_--;
1167
1168     SetDiscoveryFilter(GetMergedDiscoveryFilterMasked(discovery_filter),
1169                        callback, error_callback);
1170     return;
1171   }
1172
1173   // If there is a pending request to BlueZ, then queue this request.
1174   if (discovery_request_pending_) {
1175     VLOG(1) << "Pending request to start/stop device discovery. Queueing "
1176             << "request to stop discovery session.";
1177     error_callback.Run();
1178     return;
1179   }
1180
1181   // There are no active sessions. Return error.
1182   if (num_discovery_sessions_ == 0) {
1183     // TODO(armansito): This should never happen once we have the
1184     // DiscoverySession API. Replace this case with an assert once it's
1185     // the deprecated methods have been removed. (See crbug.com/3445008).
1186     VLOG(1) << "No active discovery sessions. Returning error.";
1187     error_callback.Run();
1188     return;
1189   }
1190
1191   // There is exactly one active discovery session. Request BlueZ to stop
1192   // discovery.
1193   DCHECK_EQ(num_discovery_sessions_, 1);
1194   discovery_request_pending_ = true;
1195   DBusThreadManager::Get()->GetBluetoothAdapterClient()->
1196       StopDiscovery(
1197           object_path_,
1198           base::Bind(&BluetoothAdapterChromeOS::OnStopDiscovery,
1199                      weak_ptr_factory_.GetWeakPtr(),
1200                      callback),
1201           base::Bind(&BluetoothAdapterChromeOS::OnStopDiscoveryError,
1202                      weak_ptr_factory_.GetWeakPtr(),
1203                      error_callback));
1204 }
1205
1206 void BluetoothAdapterChromeOS::SetDiscoveryFilter(
1207     scoped_ptr<BluetoothDiscoveryFilter> discovery_filter,
1208     const base::Closure& callback,
1209     const ErrorCallback& error_callback) {
1210   if (!IsPresent()) {
1211     error_callback.Run();
1212     return;
1213   }
1214
1215   // If old and new filter are equal (null) then don't make request, just call
1216   // succes callback
1217   if (!current_filter_ && !discovery_filter.get()) {
1218     callback.Run();
1219     return;
1220   }
1221
1222   // If old and new filter are not null and equal then don't make request, just
1223   // call succes callback
1224   if (current_filter_ && discovery_filter &&
1225       current_filter_->Equals(*discovery_filter)) {
1226     callback.Run();
1227     return;
1228   }
1229
1230   current_filter_.reset(discovery_filter.release());
1231
1232   chromeos::BluetoothAdapterClient::DiscoveryFilter dbus_discovery_filter;
1233
1234   if (current_filter_.get()) {
1235     uint16_t pathloss;
1236     int16_t rssi;
1237     uint8_t transport;
1238     std::set<device::BluetoothUUID> uuids;
1239
1240     if (current_filter_->GetPathloss(&pathloss))
1241       dbus_discovery_filter.pathloss.reset(new uint16_t(pathloss));
1242
1243     if (current_filter_->GetRSSI(&rssi))
1244       dbus_discovery_filter.rssi.reset(new int16_t(rssi));
1245
1246     transport = current_filter_->GetTransport();
1247     if (transport == BluetoothDiscoveryFilter::Transport::TRANSPORT_LE) {
1248       dbus_discovery_filter.transport.reset(new std::string("le"));
1249     } else if (transport ==
1250                BluetoothDiscoveryFilter::Transport::TRANSPORT_CLASSIC) {
1251       dbus_discovery_filter.transport.reset(new std::string("bredr"));
1252     } else if (transport ==
1253                BluetoothDiscoveryFilter::Transport::TRANSPORT_DUAL) {
1254       dbus_discovery_filter.transport.reset(new std::string("auto"));
1255     }
1256
1257     current_filter_->GetUUIDs(uuids);
1258     if (uuids.size()) {
1259       dbus_discovery_filter.uuids =
1260           scoped_ptr<std::vector<std::string>>(new std::vector<std::string>);
1261
1262       for (const auto& it : uuids)
1263         dbus_discovery_filter.uuids.get()->push_back(it.value());
1264     }
1265   }
1266
1267   DBusThreadManager::Get()->GetBluetoothAdapterClient()->SetDiscoveryFilter(
1268       object_path_, dbus_discovery_filter,
1269       base::Bind(&BluetoothAdapterChromeOS::OnSetDiscoveryFilter,
1270                  weak_ptr_factory_.GetWeakPtr(), callback, error_callback),
1271       base::Bind(&BluetoothAdapterChromeOS::OnSetDiscoveryFilterError,
1272                  weak_ptr_factory_.GetWeakPtr(), callback, error_callback));
1273 }
1274
1275 void BluetoothAdapterChromeOS::OnStartDiscovery(
1276     const base::Closure& callback,
1277     const ErrorCallback& error_callback) {
1278   // Report success on the original request and increment the count.
1279   VLOG(1) << __func__;
1280   DCHECK(discovery_request_pending_);
1281   DCHECK_EQ(num_discovery_sessions_, 0);
1282   discovery_request_pending_ = false;
1283   num_discovery_sessions_++;
1284   if (IsPresent()) {
1285     callback.Run();
1286   } else {
1287     error_callback.Run();
1288   }
1289
1290   // Try to add a new discovery session for each queued request.
1291   ProcessQueuedDiscoveryRequests();
1292 }
1293
1294 void BluetoothAdapterChromeOS::OnStartDiscoveryError(
1295     const base::Closure& callback,
1296     const ErrorCallback& error_callback,
1297     const std::string& error_name,
1298     const std::string& error_message) {
1299   LOG(WARNING) << object_path_.value() << ": Failed to start discovery: "
1300                << error_name << ": " << error_message;
1301
1302   // Failed to start discovery. This can only happen if the count is at 0.
1303   DCHECK_EQ(num_discovery_sessions_, 0);
1304   DCHECK(discovery_request_pending_);
1305   discovery_request_pending_ = false;
1306
1307   // Discovery request may fail if discovery was previously initiated by Chrome,
1308   // but the session were invalidated due to the discovery state unexpectedly
1309   // changing to false and then back to true. In this case, report success.
1310   if (IsPresent() && error_name == bluetooth_device::kErrorInProgress &&
1311       IsDiscovering()) {
1312     VLOG(1) << "Discovery previously initiated. Reporting success.";
1313     num_discovery_sessions_++;
1314     callback.Run();
1315   } else {
1316     error_callback.Run();
1317   }
1318
1319   // Try to add a new discovery session for each queued request.
1320   ProcessQueuedDiscoveryRequests();
1321 }
1322
1323 void BluetoothAdapterChromeOS::OnStopDiscovery(const base::Closure& callback) {
1324   // Report success on the original request and decrement the count.
1325   VLOG(1) << __func__;
1326   DCHECK(discovery_request_pending_);
1327   DCHECK_EQ(num_discovery_sessions_, 1);
1328   discovery_request_pending_ = false;
1329   num_discovery_sessions_--;
1330   callback.Run();
1331
1332   current_filter_.reset();
1333
1334   // Try to add a new discovery session for each queued request.
1335   ProcessQueuedDiscoveryRequests();
1336 }
1337
1338 void BluetoothAdapterChromeOS::OnStopDiscoveryError(
1339     const ErrorCallback& error_callback,
1340     const std::string& error_name,
1341     const std::string& error_message) {
1342   LOG(WARNING) << object_path_.value() << ": Failed to stop discovery: "
1343                << error_name << ": " << error_message;
1344
1345   // Failed to stop discovery. This can only happen if the count is at 1.
1346   DCHECK(discovery_request_pending_);
1347   DCHECK_EQ(num_discovery_sessions_, 1);
1348   discovery_request_pending_ = false;
1349   error_callback.Run();
1350
1351   // Try to add a new discovery session for each queued request.
1352   ProcessQueuedDiscoveryRequests();
1353 }
1354
1355 void BluetoothAdapterChromeOS::OnPreSetDiscoveryFilter(
1356     const base::Closure& callback,
1357     const ErrorCallback& error_callback) {
1358   // This is the first request to start device discovery.
1359   DCHECK(discovery_request_pending_);
1360   DCHECK_EQ(num_discovery_sessions_, 0);
1361
1362   DBusThreadManager::Get()->GetBluetoothAdapterClient()->StartDiscovery(
1363       object_path_,
1364       base::Bind(&BluetoothAdapterChromeOS::OnStartDiscovery,
1365                  weak_ptr_factory_.GetWeakPtr(), callback, error_callback),
1366       base::Bind(&BluetoothAdapterChromeOS::OnStartDiscoveryError,
1367                  weak_ptr_factory_.GetWeakPtr(), callback, error_callback));
1368 }
1369
1370 void BluetoothAdapterChromeOS::OnPreSetDiscoveryFilterError(
1371     const base::Closure& callback,
1372     const ErrorCallback& error_callback) {
1373   LOG(WARNING) << object_path_.value()
1374                << ": Failed to pre set discovery filter.";
1375
1376   // Failed to start discovery. This can only happen if the count is at 0.
1377   DCHECK_EQ(num_discovery_sessions_, 0);
1378   DCHECK(discovery_request_pending_);
1379   discovery_request_pending_ = false;
1380
1381   error_callback.Run();
1382
1383   // Try to add a new discovery session for each queued request.
1384   ProcessQueuedDiscoveryRequests();
1385 }
1386
1387 void BluetoothAdapterChromeOS::OnSetDiscoveryFilter(
1388     const base::Closure& callback,
1389     const ErrorCallback& error_callback) {
1390   // Report success on the original request and increment the count.
1391   VLOG(1) << __func__;
1392   if (IsPresent()) {
1393     callback.Run();
1394   } else {
1395     error_callback.Run();
1396   }
1397 }
1398
1399 void BluetoothAdapterChromeOS::OnSetDiscoveryFilterError(
1400     const base::Closure& callback,
1401     const ErrorCallback& error_callback,
1402     const std::string& error_name,
1403     const std::string& error_message) {
1404   LOG(WARNING) << object_path_.value()
1405                << ": Failed to set discovery filter: " << error_name << ": "
1406                << error_message;
1407
1408   error_callback.Run();
1409
1410   // Try to add a new discovery session for each queued request.
1411   ProcessQueuedDiscoveryRequests();
1412 }
1413
1414 void BluetoothAdapterChromeOS::ProcessQueuedDiscoveryRequests() {
1415   while (!discovery_request_queue_.empty()) {
1416     VLOG(1) << "Process queued discovery request.";
1417     DiscoveryParamTuple params = discovery_request_queue_.front();
1418     discovery_request_queue_.pop();
1419     AddDiscoverySession(std::get<0>(params), std::get<1>(params),
1420                         std::get<2>(params));
1421
1422     // If the queued request resulted in a pending call, then let it
1423     // asynchonously process the remaining queued requests once the pending
1424     // call returns.
1425     if (discovery_request_pending_)
1426       return;
1427   }
1428 }
1429
1430 }  // namespace chromeos