| // Copyright 2018 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "bluetooth/newblued/device_interface_handler.h" |
| |
| #include <algorithm> |
| #include <memory> |
| #include <set> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include <base/strings/stringprintf.h> |
| #include <chromeos/dbus/service_constants.h> |
| |
| #include "bluetooth/common/util.h" |
| |
| namespace bluetooth { |
| |
| namespace { |
| |
| // The default values of Flags, TX Power, EIR Class, Appearance and |
| // Manufacturer ID come from the assigned numbers and Supplement to the |
| // Bluetooth Core Specification defined by Bluetooth SIG. These default values |
| // are used to determine whether the fields are ever received in EIR and set |
| // for a device. |
| constexpr int8_t kDefaultRssi = -128; |
| constexpr int8_t kDefaultTxPower = -128; |
| constexpr uint32_t kDefaultEirClass = 0x1F00; |
| constexpr uint16_t kDefaultAppearance = 0; |
| constexpr uint16_t kDefaultManufacturerId = 0xFFFF; |
| |
| constexpr char kDeviceTypeLe[] = "LE"; |
| |
| // Canonicalizes UUIDs and wraps them as a vector for exposing or updating |
| // service UUIDs. |
| std::vector<std::string> CanonicalizeUuids(const std::set<Uuid>& uuids) { |
| std::vector<std::string> result; |
| result.reserve(uuids.size()); |
| for (const auto& uuid : uuids) |
| result.push_back(uuid.canonical_value()); |
| |
| return result; |
| } |
| |
| // Canonicalizes UUIDs associated with service data for exposing or updating |
| // service data. |
| std::map<std::string, std::vector<uint8_t>> CanonicalizeServiceData( |
| const std::map<Uuid, std::vector<uint8_t>>& service_data) { |
| std::map<std::string, std::vector<uint8_t>> result; |
| for (const auto& data : service_data) |
| result.emplace(data.first.canonical_value(), data.second); |
| |
| return result; |
| } |
| |
| // Converts pair state to string. |
| std::string ConvertPairStateToString(PairState state) { |
| switch (state) { |
| case PairState::CANCELED: |
| return "canceled"; |
| case PairState::NOT_PAIRED: |
| return "not paired"; |
| case PairState::FAILED: |
| return "failed"; |
| case PairState::PAIRED: |
| return "paired"; |
| case PairState::STARTED: |
| return "started"; |
| default: |
| return "unknown"; |
| } |
| } |
| |
| // These value are defined at https://www.bluetooth.com/specifications/gatt/ |
| // viewer?attributeXmlFile=org.bluetooth.characteristic.gap.appearance.xml. |
| // The translated strings come from BlueZ. |
| std::string ConvertAppearanceToIcon(uint16_t appearance) { |
| switch ((appearance & 0xffc0) >> 6) { |
| case 0x00: |
| return "unknown"; |
| case 0x01: |
| return "phone"; |
| case 0x02: |
| return "computer"; |
| case 0x03: |
| return "watch"; |
| case 0x04: |
| return "clock"; |
| case 0x05: |
| return "video-display"; |
| case 0x06: |
| return "remote-control"; |
| case 0x07: |
| return "eye-glasses"; |
| case 0x08: |
| return "tag"; |
| case 0x09: |
| return "key-ring"; |
| case 0x0a: |
| return "multimedia-player"; |
| case 0x0b: |
| return "scanner"; |
| case 0x0c: |
| return "thermometer"; |
| case 0x0d: |
| return "heart-rate-sensor"; |
| case 0x0e: |
| return "blood-pressure"; |
| case 0x0f: // HID Generic |
| switch (appearance & 0x3f) { |
| case 0x01: |
| return "input-keyboard"; |
| case 0x02: |
| return "input-mouse"; |
| case 0x03: |
| case 0x04: |
| return "input-gaming"; |
| case 0x05: |
| return "input-tablet"; |
| case 0x08: |
| return "scanner"; |
| } |
| break; |
| case 0x10: |
| return "glucose-meter"; |
| case 0x11: |
| return "running-walking-sensor"; |
| case 0x12: |
| return "cycling"; |
| case 0x31: |
| return "pulse-oximeter"; |
| case 0x32: |
| return "weight-scale"; |
| case 0x33: |
| return "personal-mobility-device"; |
| case 0x34: |
| return "continuous-glucose-monitor"; |
| case 0x35: |
| return "insulin-pump"; |
| case 0x36: |
| return "medication-delivery"; |
| case 0x51: |
| return "outdoor-sports-activity"; |
| default: |
| break; |
| } |
| return std::string(); |
| } |
| |
| // Converts the security manager pairing errors to BlueZ's D-Bus errors. |
| std::string ConvertSmPairErrorToDbusError(PairError error_code) { |
| switch (error_code) { |
| case PairError::NONE: |
| // This comes along with the pairing states other than |
| // SM_PAIR_STATE_FAILED. |
| return std::string(); |
| case PairError::ALREADY_PAIRED: |
| return bluetooth_device::kErrorAlreadyExists; |
| case PairError::IN_PROGRESS: |
| return bluetooth_device::kErrorInProgress; |
| case PairError::INVALID_PAIR_REQ: |
| return bluetooth_device::kErrorInvalidArguments; |
| case PairError::L2C_CONN: |
| return bluetooth_device::kErrorConnectionAttemptFailed; |
| case PairError::NO_SUCH_DEVICE: |
| return bluetooth_device::kErrorDoesNotExist; |
| case PairError::PASSKEY_FAILED: |
| case PairError::OOB_NOT_AVAILABLE: |
| case PairError::AUTH_REQ_INFEASIBLE: |
| case PairError::CONF_VALUE_MISMATCHED: |
| case PairError::PAIRING_NOT_SUPPORTED: |
| case PairError::ENCR_KEY_SIZE: |
| case PairError::REPEATED_ATTEMPT: |
| case PairError::INVALID_PARAM: |
| case PairError::UNEXPECTED_SM_CMD: |
| case PairError::SEND_SM_CMD: |
| case PairError::ENCR_CONN: |
| case PairError::UNEXPECTED_L2C_EVT: |
| return bluetooth_device::kErrorAuthenticationFailed; |
| case PairError::STALLED: |
| return bluetooth_device::kErrorAuthenticationTimeout; |
| case PairError::MEMORY: |
| case PairError::UNKNOWN: |
| default: |
| return bluetooth_device::kErrorFailed; |
| } |
| } |
| |
| // Filters out non-ASCII characters from a string by replacing them with spaces. |
| std::string AsciiString(std::string name) { |
| /* Replace all non-ASCII characters with spaces */ |
| for (auto& ch : name) { |
| if (!isascii(ch)) |
| ch = ' '; |
| } |
| |
| return name; |
| } |
| |
| std::map<uint16_t, std::vector<uint8_t>> MakeManufacturer( |
| uint16_t manufacturer_id, std::vector<uint8_t> manufacturer_data) { |
| std::map<uint16_t, std::vector<uint8_t>> manufacturer; |
| manufacturer.emplace(manufacturer_id, std::move(manufacturer_data)); |
| return manufacturer; |
| } |
| |
| } // namespace |
| |
| Device::Device() : Device("") {} |
| |
| Device::Device(const std::string& address) |
| : address(address), |
| is_random_address(false), |
| paired(false), |
| connected(false), |
| trusted(false), |
| blocked(false), |
| services_resolved(false), |
| tx_power(kDefaultTxPower), |
| rssi(kDefaultRssi), |
| eir_class(kDefaultEirClass), |
| appearance(kDefaultAppearance), |
| icon(ConvertAppearanceToIcon(kDefaultAppearance)), |
| flags({0}), |
| manufacturer( |
| MakeManufacturer(kDefaultManufacturerId, std::vector<uint8_t>())) {} |
| |
| DeviceInterfaceHandler::DeviceInterfaceHandler( |
| scoped_refptr<dbus::Bus> bus, |
| Newblue* newblue, |
| ExportedObjectManagerWrapper* exported_object_manager_wrapper) |
| : bus_(bus), |
| newblue_(newblue), |
| exported_object_manager_wrapper_(exported_object_manager_wrapper), |
| weak_ptr_factory_(this) {} |
| |
| bool DeviceInterfaceHandler::Init() { |
| // Register for pairing state changed events. |
| pair_observer_id_ = newblue_->RegisterAsPairObserver( |
| base::Bind(&DeviceInterfaceHandler::OnPairStateChanged, |
| weak_ptr_factory_.GetWeakPtr())); |
| |
| if (pair_observer_id_ == kInvalidUniqueId) |
| return false; |
| |
| return true; |
| } |
| |
| base::WeakPtr<DeviceInterfaceHandler> DeviceInterfaceHandler::GetWeakPtr() { |
| return weak_ptr_factory_.GetWeakPtr(); |
| } |
| |
| void DeviceInterfaceHandler::OnDeviceDiscovered( |
| const std::string& address, |
| uint8_t address_type, |
| int8_t rssi, |
| uint8_t reply_type, |
| const std::vector<uint8_t>& eir) { |
| Device* device = FindDevice(address); |
| if (!device) { |
| discovered_devices_[address] = std::make_unique<Device>(address); |
| device = discovered_devices_[address].get(); |
| } |
| |
| device->is_random_address = (address_type == BT_ADDR_TYPE_LE_RANDOM); |
| device->rssi.SetValue(rssi); |
| |
| VLOG(1) << base::StringPrintf("Discovered device with %s address %s, rssi %d", |
| device->is_random_address ? "random" : "public", |
| address.c_str(), device->rssi.value()); |
| |
| UpdateEir(device, eir); |
| |
| bool is_new_device = false; |
| dbus::ObjectPath device_path( |
| ConvertDeviceAddressToObjectPath(device->address.c_str())); |
| |
| ExportedInterface* device_interface = |
| exported_object_manager_wrapper_->GetExportedInterface( |
| device_path, bluetooth_device::kBluetoothDeviceInterface); |
| // The first time a device of this address is discovered, create the D-Bus |
| // object representing that device. |
| if (device_interface == nullptr) { |
| is_new_device = true; |
| exported_object_manager_wrapper_->AddExportedInterface( |
| device_path, bluetooth_device::kBluetoothDeviceInterface); |
| |
| device_interface = exported_object_manager_wrapper_->GetExportedInterface( |
| device_path, bluetooth_device::kBluetoothDeviceInterface); |
| |
| AddDeviceMethodHandlers(device_interface); |
| |
| // The "Adapter" property of this device object has to be set before |
| // ExportAndBlock() below. This is to make sure that as soon as a client |
| // realizes that this object is exported, it can immediately check this |
| // property value. This at least satisfies Chrome's behavior which checks |
| // whether this device belongs to the adapter it's interested in. |
| device_interface |
| ->EnsureExportedPropertyRegistered<dbus::ObjectPath>( |
| bluetooth_device::kAdapterProperty) |
| ->SetValue(dbus::ObjectPath(kAdapterObjectPath)); |
| |
| device_interface->ExportAndBlock(); |
| } |
| |
| UpdateDeviceProperties(device_interface, *device, is_new_device); |
| } |
| |
| void DeviceInterfaceHandler::AddDeviceMethodHandlers( |
| ExportedInterface* device_interface) { |
| CHECK(device_interface); |
| |
| device_interface->AddMethodHandlerWithMessage( |
| bluetooth_device::kPair, |
| base::Bind(&DeviceInterfaceHandler::HandlePair, base::Unretained(this))); |
| device_interface->AddMethodHandlerWithMessage( |
| bluetooth_device::kCancelPairing, |
| base::Bind(&DeviceInterfaceHandler::HandleCancelPairing, |
| base::Unretained(this))); |
| device_interface->AddMethodHandlerWithMessage( |
| bluetooth_device::kConnect, |
| base::Bind(&DeviceInterfaceHandler::HandleConnect, |
| base::Unretained(this))); |
| } |
| |
| void DeviceInterfaceHandler::HandlePair( |
| std::unique_ptr<brillo::dbus_utils::DBusMethodResponse<>> response, |
| dbus::Message* message) { |
| CHECK(message); |
| |
| std::string device_address = |
| ConvertDeviceObjectPathToAddress(message->GetPath().value()); |
| |
| VLOG(1) << "Handling Pair for device " << device_address; |
| |
| if (!ongoing_pairing_.address.empty()) { |
| LOG(WARNING) << "Pairing in progress with " << device_address; |
| response->ReplyWithError(FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorInProgress, |
| "Pairing in progress"); |
| return; |
| } |
| |
| ongoing_pairing_.address = device_address; |
| ongoing_pairing_.pair_response = std::move(response); |
| ongoing_pairing_.cancel_pair_response.reset(); |
| |
| Device* device = FindDevice(device_address); |
| if (!device || !newblue_->Pair(device->address, device->is_random_address, |
| DetermineSecurityRequirements(*device))) { |
| response->ReplyWithError(FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorFailed, "Unknown device"); |
| |
| // Clear the existing pairing to allow the new pairing request. |
| ongoing_pairing_.address.clear(); |
| ongoing_pairing_.pair_response.reset(); |
| } |
| } |
| |
| void DeviceInterfaceHandler::HandleCancelPairing( |
| std::unique_ptr<brillo::dbus_utils::DBusMethodResponse<>> response, |
| dbus::Message* message) { |
| CHECK(message); |
| |
| std::string device_address = |
| ConvertDeviceObjectPathToAddress(message->GetPath().value()); |
| |
| VLOG(1) << "Handling CancelPairing for device " << device_address; |
| |
| if (device_address.empty() || !ongoing_pairing_.pair_response) { |
| response->ReplyWithError(FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorDoesNotExist, |
| "No ongoing pairing"); |
| return; |
| } |
| |
| ongoing_pairing_.cancel_pair_response = std::move(response); |
| |
| Device* device = FindDevice(device_address); |
| if (!device || |
| !newblue_->CancelPair(device->address, device->is_random_address)) { |
| response->ReplyWithError(FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorFailed, "Unknown device"); |
| ongoing_pairing_.cancel_pair_response.reset(); |
| } |
| } |
| |
| void DeviceInterfaceHandler::HandleConnect( |
| std::unique_ptr<brillo::dbus_utils::DBusMethodResponse<>> response, |
| dbus::Message* message) { |
| CHECK(message); |
| |
| std::string device_address = |
| ConvertDeviceObjectPathToAddress(message->GetPath().value()); |
| |
| VLOG(1) << "Handling Connect for device " << device_address; |
| |
| // TODO(mcchou): Implement org.bluez.Device1.Connect. |
| response->ReplyWithError(FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorFailed, |
| "Not implemented yet"); |
| } |
| |
| Device* DeviceInterfaceHandler::FindDevice(const std::string& device_address) { |
| auto iter = discovered_devices_.find(device_address); |
| return iter != discovered_devices_.end() ? iter->second.get() : nullptr; |
| } |
| |
| void DeviceInterfaceHandler::UpdateDeviceProperties( |
| ExportedInterface* interface, const Device& device, bool is_new_device) { |
| CHECK(interface); |
| |
| // TODO(mcchou): Properties Modalias and MTU is not yet sorted out. |
| |
| // The following properties are exported when |is_new_device| is true or when |
| // they are updated. |
| if (is_new_device) { |
| // Expose immutable and non-optional properties for the new device. |
| interface->EnsureExportedPropertyRegistered<std::string>( |
| bluetooth_device::kAddressProperty)->SetValue(device.address); |
| interface->EnsureExportedPropertyRegistered<std::string>( |
| bluetooth_device::kTypeProperty)->SetValue(kDeviceTypeLe); |
| interface->EnsureExportedPropertyRegistered<bool>( |
| bluetooth_device::kLegacyPairingProperty)->SetValue(false); |
| } |
| |
| UpdateDeviceProperty(interface, bluetooth_device::kPairedProperty, |
| device.paired, is_new_device); |
| UpdateDeviceProperty(interface, bluetooth_device::kConnectedProperty, |
| device.connected, is_new_device); |
| UpdateDeviceProperty(interface, bluetooth_device::kTrustedProperty, |
| device.trusted, is_new_device); |
| UpdateDeviceProperty(interface, bluetooth_device::kBlockedProperty, |
| device.blocked, is_new_device); |
| UpdateDeviceProperty(interface, bluetooth_device::kAliasProperty, |
| device.alias, is_new_device); |
| UpdateDeviceProperty(interface, bluetooth_device::kServicesResolvedProperty, |
| device.services_resolved, is_new_device); |
| UpdateDeviceProperty(interface, |
| bluetooth_device::kAdvertisingDataFlagsProperty, |
| device.flags, is_new_device); |
| // Although RSSI is an optional device property in BlueZ, it is always |
| // provided by libnewblue, thus it is exposed by default. |
| UpdateDeviceProperty(interface, bluetooth_device::kRSSIProperty, device.rssi, |
| is_new_device); |
| |
| // The following properties are exported only when they are updated. |
| UpdateDeviceProperty(interface, bluetooth_device::kUUIDsProperty, |
| device.service_uuids, &CanonicalizeUuids, false); |
| UpdateDeviceProperty(interface, bluetooth_device::kServiceDataProperty, |
| device.service_data, &CanonicalizeServiceData, false); |
| UpdateDeviceProperty(interface, bluetooth_device::kNameProperty, device.name, |
| false); |
| UpdateDeviceProperty(interface, bluetooth_device::kTxPowerProperty, |
| device.tx_power, false); |
| UpdateDeviceProperty(interface, bluetooth_device::kClassProperty, |
| device.eir_class, false); |
| UpdateDeviceProperty(interface, bluetooth_device::kAppearanceProperty, |
| device.appearance, false); |
| UpdateDeviceProperty(interface, bluetooth_device::kIconProperty, device.icon, |
| false); |
| UpdateDeviceProperty(interface, bluetooth_device::kManufacturerDataProperty, |
| device.manufacturer, false); |
| } |
| |
| void DeviceInterfaceHandler::UpdateEir(Device* device, |
| const std::vector<uint8_t>& eir) { |
| CHECK(device); |
| |
| uint8_t pos = 0; |
| std::set<Uuid> service_uuids; |
| std::map<Uuid, std::vector<uint8_t>> service_data; |
| |
| while (pos + 1 < eir.size()) { |
| uint8_t field_len = eir[pos]; |
| |
| // End of EIR |
| if (field_len == 0) |
| break; |
| |
| // Corrupt EIR data |
| if (pos + field_len >= eir.size()) |
| break; |
| |
| EirType eir_type = static_cast<EirType>(eir[pos + 1]); |
| const uint8_t* data = &eir[pos + 2]; |
| |
| // A field consists of 1 byte field type + data: |
| // | 1-byte field_len | 1-byte type | (field length - 1) bytes data ... | |
| uint8_t data_len = field_len - 1; |
| |
| switch (eir_type) { |
| case EirType::FLAGS: |
| // No default value should be set for flags according to Supplement to |
| // the Bluetooth Core Specification. Flags field can be 0 or more octets |
| // long. If the length is 1, then flags[0] is octet[0]. Store only |
| // octet[0] for now due to lack of definition of the following octets |
| // in Supplement to the Bluetooth Core Specification. |
| if (data_len > 0) |
| device->flags.SetValue(std::vector<uint8_t>(data, data + 1)); |
| // If |data_len| is 0, we avoid setting zero-length advertising flags as |
| // this currently causes Chrome to crash. |
| // TODO(crbug.com/876908): Fix Chrome to not crash with zero-length |
| // advertising flags. |
| break; |
| |
| // If there are more than one instance of either COMPLETE or INCOMPLETE |
| // type of a UUID size, the later one(s) will be cached as well. |
| case EirType::UUID16_INCOMPLETE: |
| case EirType::UUID16_COMPLETE: |
| UpdateServiceUuids(&service_uuids, kUuid16Size, data, data_len); |
| break; |
| case EirType::UUID32_INCOMPLETE: |
| case EirType::UUID32_COMPLETE: |
| UpdateServiceUuids(&service_uuids, kUuid32Size, data, data_len); |
| break; |
| case EirType::UUID128_INCOMPLETE: |
| case EirType::UUID128_COMPLETE: |
| UpdateServiceUuids(&service_uuids, kUuid128Size, data, data_len); |
| break; |
| |
| // Name |
| case EirType::NAME_SHORT: |
| case EirType::NAME_COMPLETE: { |
| char c_name[HCI_DEV_NAME_LEN + 1]; |
| |
| // Some device has trailing '\0' at the end of the name data. |
| // So make sure we only take the characters before '\0' and limited |
| // to the max length allowed by Bluetooth spec (HCI_DEV_NAME_LEN). |
| uint8_t name_len = |
| std::min(data_len, static_cast<uint8_t>(HCI_DEV_NAME_LEN)); |
| strncpy(c_name, reinterpret_cast<const char*>(data), name_len); |
| c_name[name_len] = '\0'; |
| device->name.SetValue(AsciiString(c_name)); |
| } break; |
| |
| case EirType::TX_POWER: |
| if (data_len == 1) |
| device->tx_power.SetValue(static_cast<int8_t>(*data)); |
| break; |
| case EirType::CLASS_OF_DEV: |
| // 24-bit little endian data |
| if (data_len == 3) |
| device->eir_class.SetValue(GetNumFromLE24(data)); |
| break; |
| |
| // If the UUID already exists, the service data will be updated. |
| case EirType::SVC_DATA16: |
| UpdateServiceData(&service_data, kUuid16Size, data, data_len); |
| break; |
| case EirType::SVC_DATA32: |
| UpdateServiceData(&service_data, kUuid32Size, data, data_len); |
| break; |
| case EirType::SVC_DATA128: |
| UpdateServiceData(&service_data, kUuid128Size, data, data_len); |
| break; |
| |
| case EirType::GAP_APPEARANCE: |
| // 16-bit little endian data |
| if (data_len == 2) { |
| uint16_t appearance = GetNumFromLE16(data); |
| device->appearance.SetValue(appearance); |
| device->icon.SetValue(ConvertAppearanceToIcon(appearance)); |
| } |
| break; |
| case EirType::MANUFACTURER_DATA: |
| if (data_len >= 2) { |
| // The order of manufacturer data is not specified explicitly in |
| // Supplement to the Bluetooth Core Specification, so the original |
| // order used in BlueZ is adopted. |
| device->manufacturer.SetValue(MakeManufacturer( |
| GetNumFromLE16(data), |
| std::vector<uint8_t>(data + 2, |
| data + std::max<uint8_t>(data_len, 2)))); |
| } |
| break; |
| default: |
| // Do nothing for unhandled EIR type. |
| break; |
| } |
| |
| pos += field_len + 1; |
| } |
| |
| // In BlueZ, if alias is never provided or is set to empty for a device, the |
| // value of Alias property is set to the value of Name property if |
| // |device.name| is not empty. If |device.name| is also empty, then Alias |
| // is set to |device.address| in the following string format. |
| // xx-xx-xx-xx-xx-xx |
| if (device->internal_alias.empty()) { |
| std::string alias; |
| if (!device->name.value().empty()) { |
| alias = device->name.value(); |
| } else { |
| alias = device->address; |
| std::replace(alias.begin(), alias.end(), ':', '-'); |
| } |
| device->alias.SetValue(std::move(alias)); |
| } |
| |
| // This is different from BlueZ where it memorizes all service UUIDs and |
| // service data ever received for the same device. If there is no service |
| // UUIDs/service data being presented, service UUIDs/servicedata will not |
| // be updated. |
| if (!service_uuids.empty()) |
| device->service_uuids.SetValue(std::move(service_uuids)); |
| if (!service_data.empty()) |
| device->service_data.SetValue(std::move(service_data)); |
| } |
| |
| void DeviceInterfaceHandler::UpdateServiceUuids(std::set<Uuid>* service_uuids, |
| uint8_t uuid_size, |
| const uint8_t* data, |
| uint8_t data_len) { |
| CHECK(service_uuids && data); |
| |
| if (!data_len || data_len % uuid_size != 0) { |
| LOG(WARNING) << "Failed to parse EIR service UUIDs"; |
| return; |
| } |
| |
| // Service UUIDs are presented in little-endian order. |
| for (uint8_t i = 0; i < data_len; i += uuid_size) { |
| Uuid uuid(GetBytesFromLE(data + i, uuid_size)); |
| CHECK(uuid.format() != UuidFormat::UUID_INVALID); |
| service_uuids->insert(uuid); |
| } |
| } |
| |
| void DeviceInterfaceHandler::UpdateServiceData( |
| std::map<Uuid, std::vector<uint8_t>>* service_data, |
| uint8_t uuid_size, |
| const uint8_t* data, |
| uint8_t data_len) { |
| CHECK(service_data && data); |
| |
| if (!data_len || data_len <= uuid_size) { |
| LOG(WARNING) << "Failed to parse EIR service data"; |
| return; |
| } |
| |
| // A service UUID and its data are presented in little-endian order where the |
| // format is {<bytes of service UUID>, <bytes of service data>}. For instance, |
| // the service data associated with the battery service can be |
| // {0x0F, 0x18, 0x22, 0x11} |
| // where {0x18 0x0F} is the UUID and {0x11, 0x22} is the data. |
| Uuid uuid(GetBytesFromLE(data, uuid_size)); |
| CHECK_NE(UuidFormat::UUID_INVALID, uuid.format()); |
| service_data->emplace(uuid, |
| GetBytesFromLE(data + uuid_size, data_len - uuid_size)); |
| } |
| |
| void DeviceInterfaceHandler::ClearPropertiesUpdated(Device* device) { |
| device->paired.ClearUpdated(); |
| device->connected.ClearUpdated(); |
| device->trusted.ClearUpdated(); |
| device->blocked.ClearUpdated(); |
| device->services_resolved.ClearUpdated(); |
| device->alias.ClearUpdated(); |
| device->name.ClearUpdated(); |
| device->tx_power.ClearUpdated(); |
| device->rssi.ClearUpdated(); |
| device->eir_class.ClearUpdated(); |
| device->appearance.ClearUpdated(); |
| device->icon.ClearUpdated(); |
| device->flags.ClearUpdated(); |
| device->service_uuids.ClearUpdated(); |
| device->service_data.ClearUpdated(); |
| device->manufacturer.ClearUpdated(); |
| } |
| |
| struct smPairSecurityRequirements |
| DeviceInterfaceHandler::DetermineSecurityRequirements(const Device& device) { |
| struct smPairSecurityRequirements security_requirement = {.bond = false, |
| .mitm = false}; |
| bool security_determined = false; |
| |
| // TODO(mcchou): Determine the security requirement for different type of |
| // devices based on appearance. |
| // These value are defined at https://www.bluetooth.com/specifications/gatt/ |
| // viewer?attributeXmlFile=org.bluetooth.characteristic.gap.appearance.xml. |
| // The translated strings come from BlueZ. |
| switch ((device.appearance.value() & 0xffc0) >> 6) { |
| case 0x01: // phone |
| case 0x02: // computer |
| security_requirement.bond = true; |
| security_requirement.mitm = true; |
| security_determined = true; |
| break; |
| case 0x03: // watch |
| security_requirement.bond = true; |
| security_determined = true; |
| break; |
| case 0x0f: // HID Generic |
| switch (device.appearance.value() & 0x3f) { |
| case 0x01: // keyboard |
| case 0x05: // tablet |
| security_requirement.bond = true; |
| security_requirement.mitm = true; |
| security_determined = true; |
| break; |
| case 0x02: // mouse |
| case 0x03: // joystick |
| case 0x04: // gamepad |
| security_requirement.bond = true; |
| security_determined = true; |
| break; |
| case 0x08: // barcode-scanner |
| default: |
| break; |
| } |
| break; |
| case 0x00: // unknown |
| case 0x04: // clock |
| case 0x05: // video-display |
| case 0x06: // remote-control |
| case 0x07: // eye-glasses |
| case 0x08: // tag |
| case 0x09: // key-ring |
| case 0x0a: // multimedia-player |
| case 0x0b: // barcode-scanner |
| case 0x0c: // thermometer |
| case 0x0d: // heart-rate-sensor |
| case 0x0e: // blood-pressure |
| case 0x10: // glucose-meter |
| case 0x11: // running-walking-sensor |
| case 0x12: // cycling |
| case 0x31: // pulse-oximeter |
| case 0x32: // weight-scale |
| case 0x33: // personal-mobility-device |
| case 0x34: // continuous-glucose-monitor |
| case 0x35: // insulin-pump |
| case 0x36: // medication-delivery |
| case 0x51: // outdoor-sports-activity |
| default: |
| break; |
| } |
| |
| if (!security_determined) { |
| security_requirement.bond = true; |
| LOG(WARNING) << base::StringPrintf( |
| "The default security level (bond:%s MITM:%s) will be " |
| "used in pairing with device with appearance 0x%4X", |
| security_requirement.bond ? "true" : "false", |
| security_requirement.mitm ? "true" : "false", |
| device.appearance.value()); |
| } |
| |
| return security_requirement; |
| } |
| |
| void DeviceInterfaceHandler::OnPairStateChanged(const std::string& address, |
| PairState pair_state, |
| PairError pair_error) { |
| Device* device = FindDevice(address); |
| |
| VLOG(1) << "Pairing state changed to " << ConvertPairStateToString(pair_state) |
| << " for device " << device->address; |
| |
| std::string dbus_error; |
| |
| switch (pair_state) { |
| case PairState::CANCELED: |
| device->paired.SetValue(false); |
| dbus_error = bluetooth_device::kErrorAuthenticationCanceled; |
| case PairState::NOT_PAIRED: |
| device->paired.SetValue(false); |
| break; |
| case PairState::FAILED: |
| // If a device is previously paired, security manager will throw a |
| // SM_PAIR_ERR_ALREADY_PAIRED error which should not set the pairing state |
| // to false. |
| device->paired.SetValue(pair_error == PairError::ALREADY_PAIRED); |
| dbus_error = ConvertSmPairErrorToDbusError(pair_error); |
| break; |
| case PairState::PAIRED: |
| device->paired.SetValue(true); |
| break; |
| case PairState::STARTED: |
| default: |
| // Do not change paired property. |
| break; |
| } |
| |
| dbus::ObjectPath device_path( |
| ConvertDeviceAddressToObjectPath(device->address.c_str())); |
| ExportedInterface* device_interface = |
| exported_object_manager_wrapper_->GetExportedInterface( |
| device_path, bluetooth_device::kBluetoothDeviceInterface); |
| |
| if (device->address != ongoing_pairing_.address) { |
| UpdateDeviceProperties(device_interface, *device, false); |
| return; |
| } |
| |
| CHECK(!ongoing_pairing_.address.empty()); |
| CHECK(ongoing_pairing_.pair_response); |
| |
| // Reply to the Pair/CancelPairing method calls according to the pairing |
| // state. |
| switch (pair_state) { |
| case PairState::NOT_PAIRED: |
| // Falling back to this state indicate an unknown error, so the cancel |
| // pairing request should fail as well. |
| ongoing_pairing_.pair_response->ReplyWithError( |
| FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorFailed, "Unknown"); |
| |
| if (ongoing_pairing_.cancel_pair_response) { |
| ongoing_pairing_.cancel_pair_response->ReplyWithError( |
| FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorDoesNotExist, "No ongoing pairing"); |
| } |
| break; |
| case PairState::STARTED: |
| // For the start of the pairing, we wait for the result. |
| CHECK(!ongoing_pairing_.cancel_pair_response); |
| break; |
| case PairState::PAIRED: |
| ongoing_pairing_.pair_response->SendRawResponse( |
| ongoing_pairing_.pair_response->CreateCustomResponse()); |
| |
| if (ongoing_pairing_.cancel_pair_response) { |
| ongoing_pairing_.cancel_pair_response->ReplyWithError( |
| FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorFailed, "Unknown - pairing done"); |
| } |
| break; |
| case PairState::CANCELED: |
| ongoing_pairing_.pair_response->ReplyWithError( |
| FROM_HERE, brillo::errors::dbus::kDomain, dbus_error, |
| "Pairing canceled"); |
| |
| if (ongoing_pairing_.cancel_pair_response) { |
| ongoing_pairing_.cancel_pair_response->SendRawResponse( |
| ongoing_pairing_.cancel_pair_response->CreateCustomResponse()); |
| } |
| break; |
| case PairState::FAILED: |
| ongoing_pairing_.pair_response->ReplyWithError( |
| FROM_HERE, brillo::errors::dbus::kDomain, dbus_error, |
| "Pairing failed"); |
| |
| if (ongoing_pairing_.cancel_pair_response) { |
| ongoing_pairing_.cancel_pair_response->ReplyWithError( |
| FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorDoesNotExist, "No ongoing pairing"); |
| } |
| break; |
| default: |
| LOG(WARNING) << "Unexpected pairing state change"; |
| |
| ongoing_pairing_.pair_response->ReplyWithError( |
| FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorFailed, "Unknown"); |
| |
| if (ongoing_pairing_.cancel_pair_response) { |
| ongoing_pairing_.cancel_pair_response->ReplyWithError( |
| FROM_HERE, brillo::errors::dbus::kDomain, |
| bluetooth_device::kErrorFailed, "Unknown"); |
| } |
| break; |
| } |
| |
| if (pair_state != PairState::STARTED) { |
| ongoing_pairing_.address.clear(); |
| ongoing_pairing_.pair_response.reset(); |
| } |
| |
| ongoing_pairing_.cancel_pair_response.reset(); |
| |
| UpdateDeviceProperties(device_interface, *device, false); |
| } |
| |
| } // namespace bluetooth |
