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