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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "device/bluetooth/gatt_service.h"
#include "base/containers/contains.h"
#include "base/logging.h"
#include "base/notimplemented.h"
#include "device/bluetooth/bluetooth_adapter.h"
#include "device/bluetooth/bluetooth_local_gatt_characteristic.h"
#include "device/bluetooth/device.h"
#include "device/bluetooth/public/cpp/bluetooth_uuid.h"
namespace {
std::string_view GattErrorCodeToString(
device::BluetoothGattService::GattErrorCode error_code) {
switch (error_code) {
case device::BluetoothGattService::GattErrorCode::kUnknown:
return "Unknown";
case device::BluetoothGattService::GattErrorCode::kFailed:
return "Failed";
case device::BluetoothGattService::GattErrorCode::kInProgress:
return "In Progress";
case device::BluetoothGattService::GattErrorCode::kInvalidLength:
return "Invalid Length";
case device::BluetoothGattService::GattErrorCode::kNotPermitted:
return "Not Permitted";
case device::BluetoothGattService::GattErrorCode::kNotAuthorized:
return "Not Authorized";
case device::BluetoothGattService::GattErrorCode::kNotPaired:
return "Not Paired";
case device::BluetoothGattService::GattErrorCode::kNotSupported:
return "Not Supported";
};
}
} // namespace
namespace bluetooth {
GattService::GattService(
mojo::PendingReceiver<mojom::GattService> pending_gatt_service_receiver,
mojo::PendingRemote<mojom::GattServiceObserver> pending_observer_remote,
const device::BluetoothUUID& service_id,
scoped_refptr<device::BluetoothAdapter> adapter,
base::OnceCallback<void(device::BluetoothUUID)> on_gatt_service_invalidated)
: on_gatt_service_invalidated_(std::move(on_gatt_service_invalidated)),
service_id_(service_id),
observer_remote_(std::move(pending_observer_remote)),
adapter_(std::move(adapter)) {
receiver_.Bind(std::move(pending_gatt_service_receiver));
receiver_.set_disconnect_handler(
base::BindOnce(&GattService::OnMojoDisconnect, base::Unretained(this)));
observer_remote_.set_disconnect_handler(
base::BindOnce(&GattService::OnMojoDisconnect, base::Unretained(this)));
gatt_service_identifier_ = adapter_
->CreateLocalGattService(
/*uuid=*/service_id,
/*is_primary=*/true,
/*delegate=*/this)
->GetIdentifier();
}
GattService::~GattService() = default;
void GattService::CreateCharacteristic(
const device::BluetoothUUID& characteristic_uuid,
const device::BluetoothGattCharacteristic::Permissions& permissions,
const device::BluetoothGattCharacteristic::Properties& properties,
CreateCharacteristicCallback callback) {
device::BluetoothLocalGattService* service =
adapter_->GetGattService(gatt_service_identifier_);
if (!service) {
LOG(WARNING) << __func__ << ": expected local GATT service at service id = "
<< service_id_.canonical_value() << " does not exist.";
std::move(callback).Run(/*success=*/false);
return;
}
// Otherwise, attempt to create the characteristic and add it to this GATT
// server.
auto created_characteristic = service->CreateCharacteristic(
/*uuid=*/characteristic_uuid,
/*properties=*/properties,
/*permissions=*/permissions);
if (!created_characteristic) {
LOG(WARNING) << __func__
<< ": failure to create a characteristic at uuid = "
<< characteristic_uuid.canonical_value();
std::move(callback).Run(/*success=*/false);
return;
}
characteristic_uuids_.insert(characteristic_uuid);
std::move(callback).Run(/*success=*/true);
}
void GattService::Register(RegisterCallback callback) {
device::BluetoothLocalGattService* service =
adapter_->GetGattService(gatt_service_identifier_);
if (!service) {
LOG(WARNING) << __func__ << ": local GATT service destroyed.";
std::move(callback).Run(
device::BluetoothGattService::GattErrorCode::kFailed);
return;
}
auto split_callback = base::SplitOnceCallback(std::move(callback));
service->Register(/*callback=*/base::BindOnce(
&GattService::OnRegisterSuccess, base::Unretained(this),
std::move(split_callback.first)),
/*error_callback=*/base::BindOnce(
&GattService::OnRegisterFailure, base::Unretained(this),
std::move(split_callback.second)));
}
void GattService::OnCharacteristicReadRequest(
const device::BluetoothDevice* device,
const device::BluetoothLocalGattCharacteristic* characteristic,
int offset,
ValueCallback callback) {
CHECK(characteristic);
CHECK(base::Contains(characteristic_uuids_, characteristic->GetUUID()));
observer_remote_->OnLocalCharacteristicRead(
/*remote_device=*/Device::ConstructDeviceInfoStruct(device),
/*characteristic_uuid=*/characteristic->GetUUID(),
/*service_uuid=*/service_id_,
/*offset=*/offset,
/*callback=*/
base::BindOnce(&GattService::OnLocalCharacteristicReadResponse,
base::Unretained(this), std::move(callback)));
}
void GattService::OnCharacteristicWriteRequest(
const device::BluetoothDevice* device,
const device::BluetoothLocalGattCharacteristic* characteristic,
const std::vector<uint8_t>& value,
int offset,
base::OnceClosure callback,
ErrorCallback error_callback) {
NOTIMPLEMENTED();
}
void GattService::OnCharacteristicPrepareWriteRequest(
const device::BluetoothDevice* device,
const device::BluetoothLocalGattCharacteristic* characteristic,
const std::vector<uint8_t>& value,
int offset,
bool has_subsequent_request,
base::OnceClosure callback,
ErrorCallback error_callback) {
NOTIMPLEMENTED();
}
void GattService::OnDescriptorReadRequest(
const device::BluetoothDevice* device,
const device::BluetoothLocalGattDescriptor* descriptor,
int offset,
ValueCallback callback) {
NOTIMPLEMENTED();
}
void GattService::OnDescriptorWriteRequest(
const device::BluetoothDevice* device,
const device::BluetoothLocalGattDescriptor* descriptor,
const std::vector<uint8_t>& value,
int offset,
base::OnceClosure callback,
ErrorCallback error_callback) {
NOTIMPLEMENTED();
}
void GattService::OnNotificationsStart(
const device::BluetoothDevice* device,
device::BluetoothGattCharacteristic::NotificationType notification_type,
const device::BluetoothLocalGattCharacteristic* characteristic) {
NOTIMPLEMENTED();
}
void GattService::OnNotificationsStop(
const device::BluetoothDevice* device,
const device::BluetoothLocalGattCharacteristic* characteristic) {
NOTIMPLEMENTED();
}
void GattService::OnLocalCharacteristicReadResponse(
ValueCallback callback,
mojom::LocalCharacteristicReadResultPtr read_result) {
if (read_result->is_error_code()) {
LOG(WARNING) << __func__ << ": failed due to error: "
<< GattErrorCodeToString(read_result->get_error_code());
std::move(callback).Run(
/*error_code=*/read_result->get_error_code(),
/*data=*/std::vector<uint8_t>());
return;
}
CHECK(read_result->is_data());
std::move(callback).Run(
/*error_code=*/std::nullopt,
/*data=*/read_result->get_data());
}
void GattService::OnMojoDisconnect() {
device::BluetoothLocalGattService* service =
adapter_->GetGattService(gatt_service_identifier_);
if (!service) {
LOG(WARNING) << __func__ << ": local GATT service does not exist.";
} else {
service->Delete();
}
receiver_.reset();
// This call needs to be the last in the `OnMojoDisconnect()` logic because
// this `GattService` is expected to be destroyed after calling
// `on_gatt_service_invalidated_`.
std::move(on_gatt_service_invalidated_).Run(service_id_);
}
void GattService::OnRegisterSuccess(RegisterCallback callback) {
VLOG(1) << __func__;
std::move(callback).Run(/*error_code=*/std::nullopt);
}
void GattService::OnRegisterFailure(
RegisterCallback callback,
device::BluetoothGattService::GattErrorCode error_code) {
LOG(WARNING) << __func__ << ": failed due to error: "
<< GattErrorCodeToString(error_code);
std::move(callback).Run(error_code);
}
} // namespace bluetooth
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