OLD | NEW |
(Empty) | |
| 1 // Copyright 2016 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/dbus/bluetooth_gatt_descriptor_service_provider_impl.
h" |
| 6 |
| 7 #include <stddef.h> |
| 8 |
| 9 #include "base/bind.h" |
| 10 #include "base/logging.h" |
| 11 #include "base/strings/string_util.h" |
| 12 #include "third_party/cros_system_api/dbus/service_constants.h" |
| 13 |
| 14 namespace bluez { |
| 15 |
| 16 namespace { |
| 17 |
| 18 const char kErrorInvalidArgs[] = "org.freedesktop.DBus.Error.InvalidArgs"; |
| 19 const char kErrorPropertyReadOnly[] = |
| 20 "org.freedesktop.DBus.Error.PropertyReadOnly"; |
| 21 const char kErrorFailed[] = "org.freedesktop.DBus.Error.Failed"; |
| 22 |
| 23 } // namespace |
| 24 |
| 25 // The BluetoothGattDescriptorServiceProvider implementation used in production. |
| 26 BluetoothGattDescriptorServiceProviderImpl:: |
| 27 BluetoothGattDescriptorServiceProviderImpl( |
| 28 dbus::Bus* bus, |
| 29 const dbus::ObjectPath& object_path, |
| 30 std::unique_ptr<BluetoothGattAttributeValueDelegate> delegate, |
| 31 const std::string& uuid, |
| 32 const std::vector<std::string>& permissions, |
| 33 const dbus::ObjectPath& characteristic_path) |
| 34 : origin_thread_id_(base::PlatformThread::CurrentId()), |
| 35 uuid_(uuid), |
| 36 bus_(bus), |
| 37 delegate_(std::move(delegate)), |
| 38 object_path_(object_path), |
| 39 characteristic_path_(characteristic_path), |
| 40 weak_ptr_factory_(this) { |
| 41 VLOG(1) << "Created Bluetooth GATT characteristic descriptor: " |
| 42 << object_path.value() << " UUID: " << uuid; |
| 43 DCHECK(bus_); |
| 44 DCHECK(delegate_); |
| 45 DCHECK(!uuid_.empty()); |
| 46 DCHECK(object_path_.IsValid()); |
| 47 DCHECK(characteristic_path_.IsValid()); |
| 48 DCHECK(base::StartsWith(object_path_.value(), |
| 49 characteristic_path_.value() + "/", |
| 50 base::CompareCase::SENSITIVE)); |
| 51 |
| 52 exported_object_ = bus_->GetExportedObject(object_path_); |
| 53 |
| 54 exported_object_->ExportMethod( |
| 55 dbus::kDBusPropertiesInterface, dbus::kDBusPropertiesGet, |
| 56 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::Get, |
| 57 weak_ptr_factory_.GetWeakPtr()), |
| 58 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::OnExported, |
| 59 weak_ptr_factory_.GetWeakPtr())); |
| 60 |
| 61 exported_object_->ExportMethod( |
| 62 dbus::kDBusPropertiesInterface, dbus::kDBusPropertiesSet, |
| 63 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::Set, |
| 64 weak_ptr_factory_.GetWeakPtr()), |
| 65 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::OnExported, |
| 66 weak_ptr_factory_.GetWeakPtr())); |
| 67 |
| 68 exported_object_->ExportMethod( |
| 69 dbus::kDBusPropertiesInterface, dbus::kDBusPropertiesGetAll, |
| 70 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::GetAll, |
| 71 weak_ptr_factory_.GetWeakPtr()), |
| 72 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::OnExported, |
| 73 weak_ptr_factory_.GetWeakPtr())); |
| 74 } |
| 75 |
| 76 BluetoothGattDescriptorServiceProviderImpl:: |
| 77 ~BluetoothGattDescriptorServiceProviderImpl() { |
| 78 VLOG(1) << "Cleaning up Bluetooth GATT characteristic descriptor: " |
| 79 << object_path_.value(); |
| 80 if (bus_) |
| 81 bus_->UnregisterExportedObject(object_path_); |
| 82 } |
| 83 |
| 84 BluetoothGattDescriptorServiceProviderImpl:: |
| 85 BluetoothGattDescriptorServiceProviderImpl( |
| 86 const dbus::ObjectPath& object_path, |
| 87 const std::string& uuid, |
| 88 const dbus::ObjectPath& characteristic_path) |
| 89 : origin_thread_id_(base::PlatformThread::CurrentId()), |
| 90 uuid_(uuid), |
| 91 bus_(nullptr), |
| 92 delegate_(nullptr), |
| 93 object_path_(object_path), |
| 94 characteristic_path_(characteristic_path), |
| 95 weak_ptr_factory_(this) {} |
| 96 |
| 97 void BluetoothGattDescriptorServiceProviderImpl::SendValueChanged( |
| 98 const std::vector<uint8_t>& value) { |
| 99 VLOG(2) << "Emitting a PropertiesChanged signal for descriptor value."; |
| 100 dbus::Signal signal(dbus::kDBusPropertiesInterface, |
| 101 dbus::kDBusPropertiesChangedSignal); |
| 102 dbus::MessageWriter writer(&signal); |
| 103 dbus::MessageWriter array_writer(NULL); |
| 104 dbus::MessageWriter dict_entry_writer(NULL); |
| 105 dbus::MessageWriter variant_writer(NULL); |
| 106 |
| 107 // interface_name |
| 108 writer.AppendString( |
| 109 bluetooth_gatt_descriptor::kBluetoothGattDescriptorInterface); |
| 110 |
| 111 // changed_properties |
| 112 writer.OpenArray("{sv}", &array_writer); |
| 113 array_writer.OpenDictEntry(&dict_entry_writer); |
| 114 dict_entry_writer.AppendString(bluetooth_gatt_descriptor::kValueProperty); |
| 115 dict_entry_writer.OpenVariant("ay", &variant_writer); |
| 116 variant_writer.AppendArrayOfBytes(value.data(), value.size()); |
| 117 dict_entry_writer.CloseContainer(&variant_writer); |
| 118 array_writer.CloseContainer(&dict_entry_writer); |
| 119 writer.CloseContainer(&array_writer); |
| 120 |
| 121 // invalidated_properties. |
| 122 writer.OpenArray("s", &array_writer); |
| 123 writer.CloseContainer(&array_writer); |
| 124 |
| 125 exported_object_->SendSignal(&signal); |
| 126 } |
| 127 |
| 128 bool BluetoothGattDescriptorServiceProviderImpl::OnOriginThread() { |
| 129 return base::PlatformThread::CurrentId() == origin_thread_id_; |
| 130 } |
| 131 |
| 132 void BluetoothGattDescriptorServiceProviderImpl::Get( |
| 133 dbus::MethodCall* method_call, |
| 134 dbus::ExportedObject::ResponseSender response_sender) { |
| 135 VLOG(2) << "BluetoothGattDescriptorServiceProvider::Get: " |
| 136 << object_path_.value(); |
| 137 DCHECK(OnOriginThread()); |
| 138 |
| 139 dbus::MessageReader reader(method_call); |
| 140 |
| 141 std::string interface_name; |
| 142 std::string property_name; |
| 143 if (!reader.PopString(&interface_name) || !reader.PopString(&property_name) || |
| 144 reader.HasMoreData()) { |
| 145 std::unique_ptr<dbus::ErrorResponse> error_response = |
| 146 dbus::ErrorResponse::FromMethodCall(method_call, kErrorInvalidArgs, |
| 147 "Expected 'ss'."); |
| 148 response_sender.Run(std::move(error_response)); |
| 149 return; |
| 150 } |
| 151 |
| 152 // Only the GATT descriptor interface is supported. |
| 153 if (interface_name != |
| 154 bluetooth_gatt_descriptor::kBluetoothGattDescriptorInterface) { |
| 155 std::unique_ptr<dbus::ErrorResponse> error_response = |
| 156 dbus::ErrorResponse::FromMethodCall( |
| 157 method_call, kErrorInvalidArgs, |
| 158 "No such interface: '" + interface_name + "'."); |
| 159 response_sender.Run(std::move(error_response)); |
| 160 return; |
| 161 } |
| 162 |
| 163 // If getting the "Value" property, obtain the value from the delegate. |
| 164 if (property_name == bluetooth_gatt_descriptor::kValueProperty) { |
| 165 DCHECK(delegate_); |
| 166 delegate_->GetValue( |
| 167 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::OnGet, |
| 168 weak_ptr_factory_.GetWeakPtr(), method_call, |
| 169 response_sender), |
| 170 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::OnFailure, |
| 171 weak_ptr_factory_.GetWeakPtr(), method_call, |
| 172 response_sender)); |
| 173 return; |
| 174 } |
| 175 |
| 176 std::unique_ptr<dbus::Response> response = |
| 177 dbus::Response::FromMethodCall(method_call); |
| 178 dbus::MessageWriter writer(response.get()); |
| 179 dbus::MessageWriter variant_writer(NULL); |
| 180 |
| 181 // TODO(armansito): Process the "Permissions" property below. |
| 182 if (property_name == bluetooth_gatt_descriptor::kUUIDProperty) { |
| 183 writer.OpenVariant("s", &variant_writer); |
| 184 variant_writer.AppendString(uuid_); |
| 185 writer.CloseContainer(&variant_writer); |
| 186 } else if (property_name == |
| 187 bluetooth_gatt_descriptor::kCharacteristicProperty) { |
| 188 writer.OpenVariant("o", &variant_writer); |
| 189 variant_writer.AppendObjectPath(characteristic_path_); |
| 190 writer.CloseContainer(&variant_writer); |
| 191 } else { |
| 192 response = dbus::ErrorResponse::FromMethodCall( |
| 193 method_call, kErrorInvalidArgs, |
| 194 "No such property: '" + property_name + "'."); |
| 195 } |
| 196 |
| 197 response_sender.Run(std::move(response)); |
| 198 } |
| 199 |
| 200 void BluetoothGattDescriptorServiceProviderImpl::Set( |
| 201 dbus::MethodCall* method_call, |
| 202 dbus::ExportedObject::ResponseSender response_sender) { |
| 203 VLOG(2) << "BluetoothGattDescriptorServiceProvider::Set: " |
| 204 << object_path_.value(); |
| 205 DCHECK(OnOriginThread()); |
| 206 |
| 207 dbus::MessageReader reader(method_call); |
| 208 |
| 209 std::string interface_name; |
| 210 std::string property_name; |
| 211 dbus::MessageReader variant_reader(NULL); |
| 212 if (!reader.PopString(&interface_name) || !reader.PopString(&property_name) || |
| 213 !reader.PopVariant(&variant_reader) || reader.HasMoreData()) { |
| 214 std::unique_ptr<dbus::ErrorResponse> error_response = |
| 215 dbus::ErrorResponse::FromMethodCall(method_call, kErrorInvalidArgs, |
| 216 "Expected 'ssv'."); |
| 217 response_sender.Run(std::move(error_response)); |
| 218 return; |
| 219 } |
| 220 |
| 221 // Only the GATT descriptor interface is allowed. |
| 222 if (interface_name != |
| 223 bluetooth_gatt_descriptor::kBluetoothGattDescriptorInterface) { |
| 224 std::unique_ptr<dbus::ErrorResponse> error_response = |
| 225 dbus::ErrorResponse::FromMethodCall( |
| 226 method_call, kErrorInvalidArgs, |
| 227 "No such interface: '" + interface_name + "'."); |
| 228 response_sender.Run(std::move(error_response)); |
| 229 return; |
| 230 } |
| 231 |
| 232 // Only the "Value" property is writeable. |
| 233 if (property_name != bluetooth_gatt_descriptor::kValueProperty) { |
| 234 std::string error_name; |
| 235 std::string error_message; |
| 236 if (property_name == bluetooth_gatt_descriptor::kUUIDProperty || |
| 237 property_name == bluetooth_gatt_descriptor::kCharacteristicProperty) { |
| 238 error_name = kErrorPropertyReadOnly; |
| 239 error_message = "Read-only property: '" + property_name + "'."; |
| 240 } else { |
| 241 error_name = kErrorInvalidArgs; |
| 242 error_message = "No such property: '" + property_name + "'."; |
| 243 } |
| 244 std::unique_ptr<dbus::ErrorResponse> error_response = |
| 245 dbus::ErrorResponse::FromMethodCall(method_call, error_name, |
| 246 error_message); |
| 247 response_sender.Run(std::move(error_response)); |
| 248 return; |
| 249 } |
| 250 |
| 251 // Obtain the value. |
| 252 const uint8_t* bytes = NULL; |
| 253 size_t length = 0; |
| 254 if (!variant_reader.PopArrayOfBytes(&bytes, &length)) { |
| 255 std::unique_ptr<dbus::ErrorResponse> error_response = |
| 256 dbus::ErrorResponse::FromMethodCall( |
| 257 method_call, kErrorInvalidArgs, |
| 258 "Property '" + property_name + "' has type 'ay'."); |
| 259 response_sender.Run(std::move(error_response)); |
| 260 return; |
| 261 } |
| 262 |
| 263 // Pass the set request onto the delegate. |
| 264 std::vector<uint8_t> value(bytes, bytes + length); |
| 265 DCHECK(delegate_); |
| 266 delegate_->SetValue( |
| 267 value, |
| 268 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::OnSet, |
| 269 weak_ptr_factory_.GetWeakPtr(), method_call, response_sender), |
| 270 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::OnFailure, |
| 271 weak_ptr_factory_.GetWeakPtr(), method_call, response_sender)); |
| 272 } |
| 273 |
| 274 void BluetoothGattDescriptorServiceProviderImpl::GetAll( |
| 275 dbus::MethodCall* method_call, |
| 276 dbus::ExportedObject::ResponseSender response_sender) { |
| 277 VLOG(2) << "BluetoothGattDescriptorServiceProvider::GetAll: " |
| 278 << object_path_.value(); |
| 279 DCHECK(OnOriginThread()); |
| 280 |
| 281 dbus::MessageReader reader(method_call); |
| 282 |
| 283 std::string interface_name; |
| 284 if (!reader.PopString(&interface_name) || reader.HasMoreData()) { |
| 285 std::unique_ptr<dbus::ErrorResponse> error_response = |
| 286 dbus::ErrorResponse::FromMethodCall(method_call, kErrorInvalidArgs, |
| 287 "Expected 's'."); |
| 288 response_sender.Run(std::move(error_response)); |
| 289 return; |
| 290 } |
| 291 |
| 292 // Only the GATT descriptor interface is supported. |
| 293 if (interface_name != |
| 294 bluetooth_gatt_descriptor::kBluetoothGattDescriptorInterface) { |
| 295 std::unique_ptr<dbus::ErrorResponse> error_response = |
| 296 dbus::ErrorResponse::FromMethodCall( |
| 297 method_call, kErrorInvalidArgs, |
| 298 "No such interface: '" + interface_name + "'."); |
| 299 response_sender.Run(std::move(error_response)); |
| 300 return; |
| 301 } |
| 302 |
| 303 // Try to obtain the value from the delegate. We will construct the |
| 304 // response in the success callback. |
| 305 DCHECK(delegate_); |
| 306 delegate_->GetValue( |
| 307 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::OnGetAll, |
| 308 weak_ptr_factory_.GetWeakPtr(), method_call, response_sender), |
| 309 base::Bind(&BluetoothGattDescriptorServiceProviderImpl::OnFailure, |
| 310 weak_ptr_factory_.GetWeakPtr(), method_call, response_sender)); |
| 311 } |
| 312 |
| 313 void BluetoothGattDescriptorServiceProviderImpl::OnExported( |
| 314 const std::string& interface_name, |
| 315 const std::string& method_name, |
| 316 bool success) { |
| 317 LOG_IF(WARNING, !success) << "Failed to export " << interface_name << "." |
| 318 << method_name; |
| 319 } |
| 320 |
| 321 void BluetoothGattDescriptorServiceProviderImpl::OnGetAll( |
| 322 dbus::MethodCall* method_call, |
| 323 dbus::ExportedObject::ResponseSender response_sender, |
| 324 const std::vector<uint8_t>& value) { |
| 325 VLOG(2) << "Descriptor value obtained from delegate. Responding to " |
| 326 << "GetAll."; |
| 327 |
| 328 std::unique_ptr<dbus::Response> response = |
| 329 dbus::Response::FromMethodCall(method_call); |
| 330 dbus::MessageWriter writer(response.get()); |
| 331 WriteProperties(&writer, &value); |
| 332 response_sender.Run(std::move(response)); |
| 333 } |
| 334 |
| 335 void BluetoothGattDescriptorServiceProviderImpl::WriteProperties( |
| 336 dbus::MessageWriter* writer, |
| 337 const std::vector<uint8_t>* value) { |
| 338 dbus::MessageWriter array_writer(NULL); |
| 339 dbus::MessageWriter dict_entry_writer(NULL); |
| 340 dbus::MessageWriter variant_writer(NULL); |
| 341 |
| 342 writer->OpenArray("{sv}", &array_writer); |
| 343 |
| 344 array_writer.OpenDictEntry(&dict_entry_writer); |
| 345 dict_entry_writer.AppendString(bluetooth_gatt_descriptor::kUUIDProperty); |
| 346 dict_entry_writer.AppendVariantOfString(uuid_); |
| 347 array_writer.CloseContainer(&dict_entry_writer); |
| 348 |
| 349 array_writer.OpenDictEntry(&dict_entry_writer); |
| 350 dict_entry_writer.AppendString( |
| 351 bluetooth_gatt_descriptor::kCharacteristicProperty); |
| 352 dict_entry_writer.AppendVariantOfObjectPath(characteristic_path_); |
| 353 array_writer.CloseContainer(&dict_entry_writer); |
| 354 |
| 355 if (value) { |
| 356 array_writer.OpenDictEntry(&dict_entry_writer); |
| 357 dict_entry_writer.AppendString(bluetooth_gatt_descriptor::kValueProperty); |
| 358 dict_entry_writer.OpenVariant("ay", &variant_writer); |
| 359 variant_writer.AppendArrayOfBytes(value->data(), value->size()); |
| 360 dict_entry_writer.CloseContainer(&variant_writer); |
| 361 array_writer.CloseContainer(&dict_entry_writer); |
| 362 } |
| 363 |
| 364 // TODO(armansito): Process "Permissions" property. |
| 365 writer->CloseContainer(&array_writer); |
| 366 } |
| 367 |
| 368 // Called by the Delegate in response to a successful method call to get the |
| 369 // descriptor value. |
| 370 void BluetoothGattDescriptorServiceProviderImpl::OnGet( |
| 371 dbus::MethodCall* method_call, |
| 372 dbus::ExportedObject::ResponseSender response_sender, |
| 373 const std::vector<uint8_t>& value) { |
| 374 VLOG(2) << "Returning descriptor value obtained from delegate."; |
| 375 std::unique_ptr<dbus::Response> response = |
| 376 dbus::Response::FromMethodCall(method_call); |
| 377 dbus::MessageWriter writer(response.get()); |
| 378 dbus::MessageWriter variant_writer(NULL); |
| 379 |
| 380 writer.OpenVariant("ay", &variant_writer); |
| 381 variant_writer.AppendArrayOfBytes(value.data(), value.size()); |
| 382 writer.CloseContainer(&variant_writer); |
| 383 |
| 384 response_sender.Run(std::move(response)); |
| 385 } |
| 386 |
| 387 void BluetoothGattDescriptorServiceProviderImpl::OnSet( |
| 388 dbus::MethodCall* method_call, |
| 389 dbus::ExportedObject::ResponseSender response_sender) { |
| 390 VLOG(2) << "Successfully set descriptor value. Return success."; |
| 391 response_sender.Run(dbus::Response::FromMethodCall(method_call)); |
| 392 } |
| 393 |
| 394 void BluetoothGattDescriptorServiceProviderImpl::OnFailure( |
| 395 dbus::MethodCall* method_call, |
| 396 dbus::ExportedObject::ResponseSender response_sender) { |
| 397 VLOG(2) << "Failed to get/set descriptor value. Report error."; |
| 398 std::unique_ptr<dbus::ErrorResponse> error_response = |
| 399 dbus::ErrorResponse::FromMethodCall( |
| 400 method_call, kErrorFailed, "Failed to get/set descriptor value."); |
| 401 response_sender.Run(std::move(error_response)); |
| 402 } |
| 403 |
| 404 const dbus::ObjectPath& |
| 405 BluetoothGattDescriptorServiceProviderImpl::object_path() const { |
| 406 return object_path_; |
| 407 } |
| 408 |
| 409 } // namespace bluez |
OLD | NEW |