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| 1 // Copyright 2015 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 "components/proximity_auth/ble/bluetooth_low_energy_connection.h" | |
| 6 | |
| 7 #include <utility> | |
| 8 | |
| 9 #include "base/bind.h" | |
| 10 #include "base/location.h" | |
| 11 #include "base/memory/ref_counted.h" | |
| 12 #include "base/memory/weak_ptr.h" | |
| 13 #include "base/task_runner.h" | |
| 14 #include "base/threading/thread_task_runner_handle.h" | |
| 15 #include "base/time/time.h" | |
| 16 #include "components/cryptauth/ble/bluetooth_low_energy_characteristics_finder.h
" | |
| 17 #include "components/cryptauth/ble/fake_wire_message.h" | |
| 18 #include "components/cryptauth/bluetooth_throttler.h" | |
| 19 #include "components/cryptauth/connection.h" | |
| 20 #include "components/cryptauth/connection_finder.h" | |
| 21 #include "components/cryptauth/wire_message.h" | |
| 22 #include "components/proximity_auth/logging/logging.h" | |
| 23 #include "device/bluetooth/bluetooth_adapter.h" | |
| 24 #include "device/bluetooth/bluetooth_device.h" | |
| 25 #include "device/bluetooth/bluetooth_gatt_connection.h" | |
| 26 #include "device/bluetooth/bluetooth_gatt_notify_session.h" | |
| 27 #include "device/bluetooth/bluetooth_remote_gatt_characteristic.h" | |
| 28 #include "device/bluetooth/bluetooth_uuid.h" | |
| 29 | |
| 30 using device::BluetoothAdapter; | |
| 31 using device::BluetoothDevice; | |
| 32 using device::BluetoothGattConnection; | |
| 33 using device::BluetoothRemoteGattService; | |
| 34 using device::BluetoothRemoteGattCharacteristic; | |
| 35 using device::BluetoothGattNotifySession; | |
| 36 using device::BluetoothUUID; | |
| 37 | |
| 38 namespace proximity_auth { | |
| 39 namespace { | |
| 40 | |
| 41 // The UUID of the characteristic used to send data to the peripheral. | |
| 42 const char kToPeripheralCharUUID[] = "977c6674-1239-4e72-993b-502369b8bb5a"; | |
| 43 | |
| 44 // The UUID of the characteristic used to receive data from the peripheral. | |
| 45 const char kFromPeripheralCharUUID[] = "f4b904a2-a030-43b3-98a8-221c536c03cb"; | |
| 46 | |
| 47 // Deprecated signal send as the first byte in send byte operations. | |
| 48 const int kFirstByteZero = 0; | |
| 49 | |
| 50 // The maximum number of bytes written in a remote characteristic with a single | |
| 51 // write request. This is not the connection MTU, we are assuming that the | |
| 52 // remote device allows for writes larger than MTU. | |
| 53 const int kMaxChunkSize = 500; | |
| 54 } // namespace | |
| 55 | |
| 56 BluetoothLowEnergyConnection::BluetoothLowEnergyConnection( | |
| 57 const cryptauth::RemoteDevice& device, | |
| 58 scoped_refptr<device::BluetoothAdapter> adapter, | |
| 59 const BluetoothUUID remote_service_uuid, | |
| 60 cryptauth::BluetoothThrottler* bluetooth_throttler, | |
| 61 int max_number_of_write_attempts) | |
| 62 : cryptauth::Connection(device), | |
| 63 adapter_(adapter), | |
| 64 remote_service_({remote_service_uuid, ""}), | |
| 65 to_peripheral_char_({BluetoothUUID(kToPeripheralCharUUID), ""}), | |
| 66 from_peripheral_char_({BluetoothUUID(kFromPeripheralCharUUID), ""}), | |
| 67 bluetooth_throttler_(bluetooth_throttler), | |
| 68 task_runner_(base::ThreadTaskRunnerHandle::Get()), | |
| 69 sub_status_(SubStatus::DISCONNECTED), | |
| 70 receiving_bytes_(false), | |
| 71 write_remote_characteristic_pending_(false), | |
| 72 max_number_of_write_attempts_(max_number_of_write_attempts), | |
| 73 max_chunk_size_(kMaxChunkSize), | |
| 74 weak_ptr_factory_(this) { | |
| 75 DCHECK(adapter_); | |
| 76 DCHECK(adapter_->IsInitialized()); | |
| 77 | |
| 78 adapter_->AddObserver(this); | |
| 79 } | |
| 80 | |
| 81 BluetoothLowEnergyConnection::~BluetoothLowEnergyConnection() { | |
| 82 Disconnect(); | |
| 83 if (adapter_) { | |
| 84 adapter_->RemoveObserver(this); | |
| 85 adapter_ = NULL; | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 void BluetoothLowEnergyConnection::Connect() { | |
| 90 DCHECK(sub_status() == SubStatus::DISCONNECTED); | |
| 91 | |
| 92 SetSubStatus(SubStatus::WAITING_GATT_CONNECTION); | |
| 93 base::TimeDelta throttler_delay = bluetooth_throttler_->GetDelay(); | |
| 94 PA_LOG(INFO) << "Connecting in " << throttler_delay; | |
| 95 | |
| 96 start_time_ = base::TimeTicks::Now(); | |
| 97 | |
| 98 // If necessary, wait to create a new GATT connection. | |
| 99 // | |
| 100 // Avoid creating a new GATT connection immediately after a given device was | |
| 101 // disconnected. This is a workaround for crbug.com/508919. | |
| 102 if (!throttler_delay.is_zero()) { | |
| 103 task_runner_->PostDelayedTask( | |
| 104 FROM_HERE, | |
| 105 base::Bind(&BluetoothLowEnergyConnection::CreateGattConnection, | |
| 106 weak_ptr_factory_.GetWeakPtr()), | |
| 107 throttler_delay); | |
| 108 return; | |
| 109 } | |
| 110 | |
| 111 CreateGattConnection(); | |
| 112 } | |
| 113 | |
| 114 void BluetoothLowEnergyConnection::CreateGattConnection() { | |
| 115 DCHECK(sub_status() == SubStatus::WAITING_GATT_CONNECTION); | |
| 116 | |
| 117 BluetoothDevice* remote_device = GetRemoteDevice(); | |
| 118 if (remote_device) { | |
| 119 PA_LOG(INFO) << "Creating GATT connection with " | |
| 120 << remote_device->GetAddress(); | |
| 121 | |
| 122 remote_device->CreateGattConnection( | |
| 123 base::Bind(&BluetoothLowEnergyConnection::OnGattConnectionCreated, | |
| 124 weak_ptr_factory_.GetWeakPtr()), | |
| 125 base::Bind(&BluetoothLowEnergyConnection::OnCreateGattConnectionError, | |
| 126 weak_ptr_factory_.GetWeakPtr())); | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 void BluetoothLowEnergyConnection::Disconnect() { | |
| 131 if (sub_status() != SubStatus::DISCONNECTED) { | |
| 132 weak_ptr_factory_.InvalidateWeakPtrs(); | |
| 133 StopNotifySession(); | |
| 134 characteristic_finder_.reset(); | |
| 135 if (gatt_connection_) { | |
| 136 PA_LOG(INFO) << "Disconnect from device " | |
| 137 << gatt_connection_->GetDeviceAddress(); | |
| 138 | |
| 139 // Destroying BluetoothGattConnection also disconnects it. | |
| 140 gatt_connection_.reset(); | |
| 141 } | |
| 142 | |
| 143 // Only transition to the DISCONNECTED state after perfoming all necessary | |
| 144 // operations. Otherwise, it'll trigger observers that can pontentially | |
| 145 // destroy the current instance (causing a crash). | |
| 146 SetSubStatus(SubStatus::DISCONNECTED); | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 void BluetoothLowEnergyConnection::SetSubStatus(SubStatus new_sub_status) { | |
| 151 sub_status_ = new_sub_status; | |
| 152 | |
| 153 // Sets the status of parent class cryptauth::Connection accordingly. | |
| 154 if (new_sub_status == SubStatus::CONNECTED) { | |
| 155 SetStatus(CONNECTED); | |
| 156 } else if (new_sub_status == SubStatus::DISCONNECTED) { | |
| 157 SetStatus(DISCONNECTED); | |
| 158 } else { | |
| 159 SetStatus(IN_PROGRESS); | |
| 160 } | |
| 161 } | |
| 162 | |
| 163 void BluetoothLowEnergyConnection::SetTaskRunnerForTesting( | |
| 164 scoped_refptr<base::TaskRunner> task_runner) { | |
| 165 task_runner_ = task_runner; | |
| 166 } | |
| 167 | |
| 168 void BluetoothLowEnergyConnection::SendMessageImpl( | |
| 169 std::unique_ptr<cryptauth::WireMessage> message) { | |
| 170 PA_LOG(INFO) << "Sending message " << message->Serialize(); | |
| 171 std::string serialized_msg = message->Serialize(); | |
| 172 | |
| 173 // [First write]: Build a header with the [send signal] + [size of the | |
| 174 // message]. | |
| 175 WriteRequest write_request = BuildWriteRequest( | |
| 176 ToByteVector(static_cast<uint32_t>(ControlSignal::kSendSignal)), | |
| 177 ToByteVector(static_cast<uint32_t>(serialized_msg.size())), false); | |
| 178 | |
| 179 // [First write]: Fill the it with a prefix of |serialized_msg| up to | |
| 180 // |max_chunk_size_|. | |
| 181 size_t first_chunk_size = std::min( | |
| 182 max_chunk_size_ - write_request.value.size(), serialized_msg.size()); | |
| 183 std::vector<uint8_t> bytes(serialized_msg.begin(), | |
| 184 serialized_msg.begin() + first_chunk_size); | |
| 185 write_request.value.insert(write_request.value.end(), bytes.begin(), | |
| 186 bytes.end()); | |
| 187 | |
| 188 bool is_last_write_request = first_chunk_size == serialized_msg.size(); | |
| 189 write_request.is_last_write_for_wire_message = is_last_write_request; | |
| 190 WriteRemoteCharacteristic(write_request); | |
| 191 if (is_last_write_request) | |
| 192 return; | |
| 193 | |
| 194 // [Other write requests]: Each chunk has to include a deprecated signal: | |
| 195 // |kFirstByteZero| as the first byte. | |
| 196 int chunk_size = max_chunk_size_ - 1; | |
| 197 std::vector<uint8_t> kFirstByteZeroVector; | |
| 198 kFirstByteZeroVector.push_back(static_cast<uint8_t>(kFirstByteZero)); | |
| 199 | |
| 200 int message_size = static_cast<int>(serialized_msg.size()); | |
| 201 int start_index = first_chunk_size; | |
| 202 while (start_index < message_size) { | |
| 203 int end_index = (start_index + chunk_size) <= message_size | |
| 204 ? (start_index + chunk_size) | |
| 205 : message_size; | |
| 206 bool is_last_write_request = (end_index == message_size); | |
| 207 write_request = BuildWriteRequest( | |
| 208 kFirstByteZeroVector, | |
| 209 std::vector<uint8_t>(serialized_msg.begin() + start_index, | |
| 210 serialized_msg.begin() + end_index), | |
| 211 is_last_write_request); | |
| 212 WriteRemoteCharacteristic(write_request); | |
| 213 start_index = end_index; | |
| 214 } | |
| 215 } | |
| 216 | |
| 217 // Changes in the GATT connection with the remote device should be observed | |
| 218 // here. If the GATT connection is dropped, we should call Disconnect() anyway, | |
| 219 // so the object can notify its observers. | |
| 220 void BluetoothLowEnergyConnection::DeviceChanged(BluetoothAdapter* adapter, | |
| 221 BluetoothDevice* device) { | |
| 222 DCHECK(device); | |
| 223 if (sub_status() == SubStatus::DISCONNECTED || | |
| 224 device->GetAddress() != GetDeviceAddress()) | |
| 225 return; | |
| 226 | |
| 227 if (sub_status() != SubStatus::WAITING_GATT_CONNECTION && | |
| 228 !device->IsConnected()) { | |
| 229 PA_LOG(INFO) << "GATT connection dropped " << GetDeviceAddress() | |
| 230 << "\ndevice connected: " << device->IsConnected() | |
| 231 << "\ngatt connection: " | |
| 232 << (gatt_connection_ ? gatt_connection_->IsConnected() | |
| 233 : false); | |
| 234 Disconnect(); | |
| 235 } | |
| 236 } | |
| 237 | |
| 238 void BluetoothLowEnergyConnection::DeviceRemoved(BluetoothAdapter* adapter, | |
| 239 BluetoothDevice* device) { | |
| 240 DCHECK(device); | |
| 241 if (sub_status_ == SubStatus::DISCONNECTED || | |
| 242 device->GetAddress() != GetDeviceAddress()) | |
| 243 return; | |
| 244 | |
| 245 PA_LOG(INFO) << "Device removed " << GetDeviceAddress(); | |
| 246 Disconnect(); | |
| 247 } | |
| 248 | |
| 249 void BluetoothLowEnergyConnection::GattCharacteristicValueChanged( | |
| 250 BluetoothAdapter* adapter, | |
| 251 BluetoothRemoteGattCharacteristic* characteristic, | |
| 252 const std::vector<uint8_t>& value) { | |
| 253 DCHECK_EQ(adapter, adapter_.get()); | |
| 254 if (sub_status() != SubStatus::WAITING_RESPONSE_SIGNAL && | |
| 255 sub_status() != SubStatus::CONNECTED) | |
| 256 return; | |
| 257 | |
| 258 PA_LOG(INFO) << "Characteristic value changed: " | |
| 259 << characteristic->GetUUID().canonical_value(); | |
| 260 | |
| 261 if (characteristic->GetIdentifier() == from_peripheral_char_.id) { | |
| 262 if (receiving_bytes_) { | |
| 263 // Ignoring the first byte, as it contains a deprecated signal. | |
| 264 const std::string bytes(value.begin() + 1, value.end()); | |
| 265 incoming_bytes_buffer_.append(bytes); | |
| 266 if (incoming_bytes_buffer_.size() >= expected_number_of_incoming_bytes_) { | |
| 267 OnBytesReceived(incoming_bytes_buffer_); | |
| 268 receiving_bytes_ = false; | |
| 269 } | |
| 270 return; | |
| 271 } | |
| 272 | |
| 273 if (value.size() < 4) { | |
| 274 PA_LOG(WARNING) << "Incoming data corrupted, no signal found."; | |
| 275 return; | |
| 276 } | |
| 277 | |
| 278 const ControlSignal signal = static_cast<ControlSignal>(ToUint32(value)); | |
| 279 switch (signal) { | |
| 280 case ControlSignal::kInvitationResponseSignal: | |
| 281 if (sub_status() == SubStatus::WAITING_RESPONSE_SIGNAL) | |
| 282 CompleteConnection(); | |
| 283 break; | |
| 284 case ControlSignal::kInviteToConnectSignal: | |
| 285 break; | |
| 286 case ControlSignal::kSendSignal: { | |
| 287 if (value.size() < 8) { | |
| 288 PA_LOG(WARNING) | |
| 289 << "Incoming data corrupted, expected message size not found."; | |
| 290 return; | |
| 291 } | |
| 292 std::vector<uint8_t> size(value.begin() + 4, value.begin() + 8); | |
| 293 expected_number_of_incoming_bytes_ = | |
| 294 static_cast<size_t>(ToUint32(size)); | |
| 295 receiving_bytes_ = true; | |
| 296 incoming_bytes_buffer_.clear(); | |
| 297 | |
| 298 const std::string bytes(value.begin() + 8, value.end()); | |
| 299 incoming_bytes_buffer_.append(bytes); | |
| 300 if (incoming_bytes_buffer_.size() >= | |
| 301 expected_number_of_incoming_bytes_) { | |
| 302 OnBytesReceived(incoming_bytes_buffer_); | |
| 303 receiving_bytes_ = false; | |
| 304 } | |
| 305 break; | |
| 306 } | |
| 307 case ControlSignal::kDisconnectSignal: | |
| 308 PA_LOG(INFO) << "Disconnect signal received."; | |
| 309 Disconnect(); | |
| 310 break; | |
| 311 } | |
| 312 } | |
| 313 } | |
| 314 | |
| 315 BluetoothLowEnergyConnection::WriteRequest::WriteRequest( | |
| 316 const std::vector<uint8_t>& val, | |
| 317 bool flag) | |
| 318 : value(val), | |
| 319 is_last_write_for_wire_message(flag), | |
| 320 number_of_failed_attempts(0) {} | |
| 321 | |
| 322 BluetoothLowEnergyConnection::WriteRequest::WriteRequest( | |
| 323 const WriteRequest& other) = default; | |
| 324 | |
| 325 BluetoothLowEnergyConnection::WriteRequest::~WriteRequest() {} | |
| 326 | |
| 327 void BluetoothLowEnergyConnection::CompleteConnection() { | |
| 328 PA_LOG(INFO) << "Connection completed. Time elapsed: " | |
| 329 << base::TimeTicks::Now() - start_time_; | |
| 330 SetSubStatus(SubStatus::CONNECTED); | |
| 331 } | |
| 332 | |
| 333 void BluetoothLowEnergyConnection::OnCreateGattConnectionError( | |
| 334 device::BluetoothDevice::ConnectErrorCode error_code) { | |
| 335 DCHECK(sub_status_ == SubStatus::WAITING_GATT_CONNECTION); | |
| 336 PA_LOG(WARNING) << "Error creating GATT connection to " | |
| 337 << remote_device().bluetooth_address | |
| 338 << "error code: " << error_code; | |
| 339 Disconnect(); | |
| 340 } | |
| 341 | |
| 342 void BluetoothLowEnergyConnection::OnGattConnectionCreated( | |
| 343 std::unique_ptr<device::BluetoothGattConnection> gatt_connection) { | |
| 344 DCHECK(sub_status() == SubStatus::WAITING_GATT_CONNECTION); | |
| 345 PA_LOG(INFO) << "GATT connection with " << gatt_connection->GetDeviceAddress() | |
| 346 << " created."; | |
| 347 PrintTimeElapsed(); | |
| 348 | |
| 349 // Informing |bluetooth_trottler_| a new connection was established. | |
| 350 bluetooth_throttler_->OnConnection(this); | |
| 351 | |
| 352 gatt_connection_ = std::move(gatt_connection); | |
| 353 SetSubStatus(SubStatus::WAITING_CHARACTERISTICS); | |
| 354 characteristic_finder_.reset(CreateCharacteristicsFinder( | |
| 355 base::Bind(&BluetoothLowEnergyConnection::OnCharacteristicsFound, | |
| 356 weak_ptr_factory_.GetWeakPtr()), | |
| 357 base::Bind(&BluetoothLowEnergyConnection::OnCharacteristicsFinderError, | |
| 358 weak_ptr_factory_.GetWeakPtr()))); | |
| 359 } | |
| 360 | |
| 361 cryptauth::BluetoothLowEnergyCharacteristicsFinder* | |
| 362 BluetoothLowEnergyConnection::CreateCharacteristicsFinder( | |
| 363 const cryptauth::BluetoothLowEnergyCharacteristicsFinder::SuccessCallback& | |
| 364 success_callback, | |
| 365 const cryptauth::BluetoothLowEnergyCharacteristicsFinder::ErrorCallback& | |
| 366 error_callback) { | |
| 367 return new cryptauth::BluetoothLowEnergyCharacteristicsFinder( | |
| 368 adapter_, GetRemoteDevice(), remote_service_, to_peripheral_char_, | |
| 369 from_peripheral_char_, success_callback, error_callback); | |
| 370 } | |
| 371 | |
| 372 void BluetoothLowEnergyConnection::OnCharacteristicsFound( | |
| 373 const cryptauth::RemoteAttribute& service, | |
| 374 const cryptauth::RemoteAttribute& to_peripheral_char, | |
| 375 const cryptauth::RemoteAttribute& from_peripheral_char) { | |
| 376 PA_LOG(INFO) << "Remote chacteristics found."; | |
| 377 PrintTimeElapsed(); | |
| 378 | |
| 379 DCHECK(sub_status() == SubStatus::WAITING_CHARACTERISTICS); | |
| 380 remote_service_ = service; | |
| 381 to_peripheral_char_ = to_peripheral_char; | |
| 382 from_peripheral_char_ = from_peripheral_char; | |
| 383 | |
| 384 SetSubStatus(SubStatus::CHARACTERISTICS_FOUND); | |
| 385 StartNotifySession(); | |
| 386 } | |
| 387 | |
| 388 void BluetoothLowEnergyConnection::OnCharacteristicsFinderError( | |
| 389 const cryptauth::RemoteAttribute& to_peripheral_char, | |
| 390 const cryptauth::RemoteAttribute& from_peripheral_char) { | |
| 391 DCHECK(sub_status() == SubStatus::WAITING_CHARACTERISTICS); | |
| 392 PA_LOG(WARNING) << "Connection error, missing characteristics for SmartLock " | |
| 393 "service.\n" | |
| 394 << (to_peripheral_char.id.empty() | |
| 395 ? to_peripheral_char.uuid.canonical_value() | |
| 396 : "") | |
| 397 << (from_peripheral_char.id.empty() | |
| 398 ? ", " + from_peripheral_char.uuid.canonical_value() | |
| 399 : "") << " not found."; | |
| 400 | |
| 401 Disconnect(); | |
| 402 } | |
| 403 | |
| 404 void BluetoothLowEnergyConnection::StartNotifySession() { | |
| 405 if (sub_status() == SubStatus::CHARACTERISTICS_FOUND) { | |
| 406 BluetoothRemoteGattCharacteristic* characteristic = | |
| 407 GetGattCharacteristic(from_peripheral_char_.id); | |
| 408 DCHECK(characteristic); | |
| 409 | |
| 410 // This is a workaround for crbug.com/507325. If |characteristic| is already | |
| 411 // notifying |characteristic->StartNotifySession()| will fail with | |
| 412 // GATT_ERROR_FAILED. | |
| 413 if (characteristic->IsNotifying()) { | |
| 414 PA_LOG(INFO) << characteristic->GetUUID().canonical_value() | |
| 415 << " already notifying."; | |
| 416 SetSubStatus(SubStatus::NOTIFY_SESSION_READY); | |
| 417 SendInviteToConnectSignal(); | |
| 418 return; | |
| 419 } | |
| 420 | |
| 421 SetSubStatus(SubStatus::WAITING_NOTIFY_SESSION); | |
| 422 characteristic->StartNotifySession( | |
| 423 base::Bind(&BluetoothLowEnergyConnection::OnNotifySessionStarted, | |
| 424 weak_ptr_factory_.GetWeakPtr()), | |
| 425 base::Bind(&BluetoothLowEnergyConnection::OnNotifySessionError, | |
| 426 weak_ptr_factory_.GetWeakPtr())); | |
| 427 } | |
| 428 } | |
| 429 | |
| 430 void BluetoothLowEnergyConnection::OnNotifySessionError( | |
| 431 BluetoothRemoteGattService::GattErrorCode error) { | |
| 432 DCHECK(sub_status() == SubStatus::WAITING_NOTIFY_SESSION); | |
| 433 PA_LOG(WARNING) << "Error starting notification session: " << error; | |
| 434 Disconnect(); | |
| 435 } | |
| 436 | |
| 437 void BluetoothLowEnergyConnection::OnNotifySessionStarted( | |
| 438 std::unique_ptr<BluetoothGattNotifySession> notify_session) { | |
| 439 DCHECK(sub_status() == SubStatus::WAITING_NOTIFY_SESSION); | |
| 440 PA_LOG(INFO) << "Notification session started " | |
| 441 << notify_session->GetCharacteristicIdentifier(); | |
| 442 PrintTimeElapsed(); | |
| 443 | |
| 444 SetSubStatus(SubStatus::NOTIFY_SESSION_READY); | |
| 445 notify_session_ = std::move(notify_session); | |
| 446 | |
| 447 SendInviteToConnectSignal(); | |
| 448 } | |
| 449 | |
| 450 void BluetoothLowEnergyConnection::StopNotifySession() { | |
| 451 if (notify_session_) { | |
| 452 notify_session_->Stop(base::Bind(&base::DoNothing)); | |
| 453 notify_session_.reset(); | |
| 454 } | |
| 455 } | |
| 456 | |
| 457 void BluetoothLowEnergyConnection::SendInviteToConnectSignal() { | |
| 458 if (sub_status() == SubStatus::NOTIFY_SESSION_READY) { | |
| 459 PA_LOG(INFO) << "Sending invite to connect signal"; | |
| 460 SetSubStatus(SubStatus::WAITING_RESPONSE_SIGNAL); | |
| 461 | |
| 462 WriteRequest write_request = BuildWriteRequest( | |
| 463 ToByteVector( | |
| 464 static_cast<uint32_t>(ControlSignal::kInviteToConnectSignal)), | |
| 465 std::vector<uint8_t>(), false); | |
| 466 | |
| 467 WriteRemoteCharacteristic(write_request); | |
| 468 } | |
| 469 } | |
| 470 | |
| 471 void BluetoothLowEnergyConnection::WriteRemoteCharacteristic( | |
| 472 WriteRequest request) { | |
| 473 write_requests_queue_.push(request); | |
| 474 ProcessNextWriteRequest(); | |
| 475 } | |
| 476 | |
| 477 void BluetoothLowEnergyConnection::ProcessNextWriteRequest() { | |
| 478 BluetoothRemoteGattCharacteristic* characteristic = | |
| 479 GetGattCharacteristic(to_peripheral_char_.id); | |
| 480 if (!write_requests_queue_.empty() && !write_remote_characteristic_pending_ && | |
| 481 characteristic) { | |
| 482 write_remote_characteristic_pending_ = true; | |
| 483 WriteRequest next_request = write_requests_queue_.front(); | |
| 484 PA_LOG(INFO) << "Writing characteristic..."; | |
| 485 characteristic->WriteRemoteCharacteristic( | |
| 486 next_request.value, | |
| 487 base::Bind(&BluetoothLowEnergyConnection::OnRemoteCharacteristicWritten, | |
| 488 weak_ptr_factory_.GetWeakPtr(), | |
| 489 next_request.is_last_write_for_wire_message), | |
| 490 base::Bind( | |
| 491 &BluetoothLowEnergyConnection::OnWriteRemoteCharacteristicError, | |
| 492 weak_ptr_factory_.GetWeakPtr(), | |
| 493 next_request.is_last_write_for_wire_message)); | |
| 494 } | |
| 495 } | |
| 496 | |
| 497 void BluetoothLowEnergyConnection::OnRemoteCharacteristicWritten( | |
| 498 bool run_did_send_message_callback) { | |
| 499 PA_LOG(INFO) << "Characteristic written."; | |
| 500 write_remote_characteristic_pending_ = false; | |
| 501 // TODO(sacomoto): Actually pass the current message to the observer. | |
| 502 if (run_did_send_message_callback) | |
| 503 OnDidSendMessage(cryptauth::WireMessage(std::string(), std::string()), | |
| 504 true); | |
| 505 | |
| 506 // Removes the top of queue (already processed) and process the next request. | |
| 507 DCHECK(!write_requests_queue_.empty()); | |
| 508 write_requests_queue_.pop(); | |
| 509 ProcessNextWriteRequest(); | |
| 510 } | |
| 511 | |
| 512 void BluetoothLowEnergyConnection::OnWriteRemoteCharacteristicError( | |
| 513 bool run_did_send_message_callback, | |
| 514 BluetoothRemoteGattService::GattErrorCode error) { | |
| 515 PA_LOG(WARNING) << "Error " << error << " writing characteristic: " | |
| 516 << to_peripheral_char_.uuid.canonical_value(); | |
| 517 write_remote_characteristic_pending_ = false; | |
| 518 // TODO(sacomoto): Actually pass the current message to the observer. | |
| 519 if (run_did_send_message_callback) | |
| 520 OnDidSendMessage(cryptauth::WireMessage(std::string(), std::string()), | |
| 521 false); | |
| 522 | |
| 523 // Increases the number of failed attempts and retry. | |
| 524 DCHECK(!write_requests_queue_.empty()); | |
| 525 if (++write_requests_queue_.front().number_of_failed_attempts >= | |
| 526 max_number_of_write_attempts_) { | |
| 527 Disconnect(); | |
| 528 return; | |
| 529 } | |
| 530 ProcessNextWriteRequest(); | |
| 531 } | |
| 532 | |
| 533 BluetoothLowEnergyConnection::WriteRequest | |
| 534 BluetoothLowEnergyConnection::BuildWriteRequest( | |
| 535 const std::vector<uint8_t>& signal, | |
| 536 const std::vector<uint8_t>& bytes, | |
| 537 bool is_last_write_for_wire_message) { | |
| 538 std::vector<uint8_t> value(signal.begin(), signal.end()); | |
| 539 value.insert(value.end(), bytes.begin(), bytes.end()); | |
| 540 return WriteRequest(value, is_last_write_for_wire_message); | |
| 541 } | |
| 542 | |
| 543 void BluetoothLowEnergyConnection::PrintTimeElapsed() { | |
| 544 PA_LOG(INFO) << "Time elapsed: " << base::TimeTicks::Now() - start_time_; | |
| 545 } | |
| 546 | |
| 547 std::string BluetoothLowEnergyConnection::GetDeviceAddress() { | |
| 548 // When the remote device is connected we should rely on the address given by | |
| 549 // |gatt_connection_|. As the device address may change if the device is | |
| 550 // paired. The address in |gatt_connection_| is automatically updated in this | |
| 551 // case. | |
| 552 return gatt_connection_ ? gatt_connection_->GetDeviceAddress() | |
| 553 : remote_device().bluetooth_address; | |
| 554 } | |
| 555 | |
| 556 BluetoothDevice* BluetoothLowEnergyConnection::GetRemoteDevice() { | |
| 557 // It's not possible to simply use | |
| 558 // |adapter_->GetDevice(GetDeviceAddress())| to find the device with MAC | |
| 559 // address |GetDeviceAddress()|. For paired devices, | |
| 560 // BluetoothAdapter::GetDevice(XXX) searches for the temporary MAC address | |
| 561 // XXX, whereas |GetDeviceAddress()| is the real MAC address. This is a | |
| 562 // bug in the way device::BluetoothAdapter is storing the devices (see | |
| 563 // crbug.com/497841). | |
| 564 std::vector<BluetoothDevice*> devices = adapter_->GetDevices(); | |
| 565 for (auto* device : devices) { | |
| 566 if (device->GetAddress() == GetDeviceAddress()) | |
| 567 return device; | |
| 568 } | |
| 569 | |
| 570 return nullptr; | |
| 571 } | |
| 572 | |
| 573 BluetoothRemoteGattService* BluetoothLowEnergyConnection::GetRemoteService() { | |
| 574 BluetoothDevice* remote_device = GetRemoteDevice(); | |
| 575 if (!remote_device) { | |
| 576 PA_LOG(WARNING) << "Remote device not found."; | |
| 577 return NULL; | |
| 578 } | |
| 579 if (remote_service_.id.empty()) { | |
| 580 std::vector<BluetoothRemoteGattService*> services = | |
| 581 remote_device->GetGattServices(); | |
| 582 for (const auto* service : services) | |
| 583 if (service->GetUUID() == remote_service_.uuid) { | |
| 584 remote_service_.id = service->GetIdentifier(); | |
| 585 break; | |
| 586 } | |
| 587 } | |
| 588 return remote_device->GetGattService(remote_service_.id); | |
| 589 } | |
| 590 | |
| 591 BluetoothRemoteGattCharacteristic* | |
| 592 BluetoothLowEnergyConnection::GetGattCharacteristic( | |
| 593 const std::string& gatt_characteristic) { | |
| 594 BluetoothRemoteGattService* remote_service = GetRemoteService(); | |
| 595 if (!remote_service) { | |
| 596 PA_LOG(WARNING) << "Remote service not found."; | |
| 597 return NULL; | |
| 598 } | |
| 599 return remote_service->GetCharacteristic(gatt_characteristic); | |
| 600 } | |
| 601 | |
| 602 // TODO(sacomoto): make this robust to byte ordering in both sides of the | |
| 603 // SmartLock BLE socket. | |
| 604 uint32_t BluetoothLowEnergyConnection::ToUint32( | |
| 605 const std::vector<uint8_t>& bytes) { | |
| 606 return bytes[0] | (bytes[1] << 8) | (bytes[2] << 16) | (bytes[3] << 24); | |
| 607 } | |
| 608 | |
| 609 // TODO(sacomoto): make this robust to byte ordering in both sides of the | |
| 610 // SmartLock BLE socket. | |
| 611 const std::vector<uint8_t> BluetoothLowEnergyConnection::ToByteVector( | |
| 612 const uint32_t value) { | |
| 613 std::vector<uint8_t> bytes(4, 0); | |
| 614 bytes[0] = static_cast<uint8_t>(value); | |
| 615 bytes[1] = static_cast<uint8_t>(value >> 8); | |
| 616 bytes[2] = static_cast<uint8_t>(value >> 16); | |
| 617 bytes[3] = static_cast<uint8_t>(value >> 24); | |
| 618 return bytes; | |
| 619 } | |
| 620 | |
| 621 } // namespace proximity_auth | |
| OLD | NEW |
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Chromium Code Reviews
Issue 2843443003:
[EasyUnlock] Delete unused BLE code. (Closed)
