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// Copyright 2018 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/bluetooth_low_energy_advertisement_manager_mac.h"
#include <optional>
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/strings/sys_string_conversions.h"
#import "base/task/single_thread_task_runner.h"
#include "device/bluetooth/bluetooth_advertisement.h"
namespace device {
BluetoothLowEnergyAdvertisementManagerMac::
BluetoothLowEnergyAdvertisementManagerMac() = default;
BluetoothLowEnergyAdvertisementManagerMac::
~BluetoothLowEnergyAdvertisementManagerMac() = default;
void BluetoothLowEnergyAdvertisementManagerMac::Init(
scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
CBPeripheralManager* peripheral_manager) {
ui_task_runner_ = ui_task_runner;
peripheral_manager_ = peripheral_manager;
}
void BluetoothLowEnergyAdvertisementManagerMac::
OnPeripheralManagerStateChanged() {
// This function handles several cases:
// 1. Error out when registering an advertisement, but the adapter is not
// powered on.
// 2. Start advertising a registered advertisement if the adapter is powered
// on.
// 3. Stop the advertisement when the adapter is powered off.
// Note that if the adapter is powered off while advertising, macOS will
// automatically restart advertising when the adapter is powered back on,
// so we need to explicitly stop advertising in this case.
if (!active_advertisement_) {
return;
}
CBManagerState adapter_state = [peripheral_manager_ state];
if (adapter_state == CBManagerStateUnknown) {
// Wait for the adapter to initialize.
return;
}
if (active_advertisement_->is_waiting_for_adapter() &&
adapter_state < CBManagerStatePoweredOn) {
DVLOG(1)
<< "Registration failed. Adapter changed to invalid adapter_state.";
BluetoothAdvertisement::ErrorCode error_code =
adapter_state == CBManagerStatePoweredOff
? BluetoothAdvertisement::ERROR_ADAPTER_POWERED_OFF
: BluetoothAdvertisement::ERROR_UNSUPPORTED_PLATFORM;
active_advertisement_->OnAdvertisementError(ui_task_runner_.get(),
error_code);
active_advertisement_ = nullptr;
return;
}
if (active_advertisement_->is_advertising() &&
adapter_state == CBManagerStateResetting) {
DVLOG(1) << "Adapter resetting. Invalidating advertisement.";
active_advertisement_->OnAdapterReset();
active_advertisement_ = nullptr;
return;
}
if (active_advertisement_->is_advertising() &&
adapter_state == CBManagerStatePoweredOff) {
DVLOG(1) << "Adapter powered off. Stopping advertisement.";
// Note: we purposefully don't unregister the active advertisement for
// consistency with ChromeOS. The caller must manually unregister
// the advertisement themselves.
[peripheral_manager_ stopAdvertising];
return;
}
if (active_advertisement_->is_waiting_for_adapter()) {
StartAdvertising();
}
}
void BluetoothLowEnergyAdvertisementManagerMac::StartAdvertising() {
NSMutableArray* service_uuid_array = [[NSMutableArray alloc]
initWithCapacity:active_advertisement_->service_uuids().size()];
for (const std::string& service_uuid :
active_advertisement_->service_uuids()) {
NSString* uuid_string = base::SysUTF8ToNSString(service_uuid);
[service_uuid_array addObject:[CBUUID UUIDWithString:uuid_string]];
}
active_advertisement_->OnAdvertisementPending();
[peripheral_manager_ startAdvertising:@{
CBAdvertisementDataServiceUUIDsKey : service_uuid_array
}];
}
void BluetoothLowEnergyAdvertisementManagerMac::RegisterAdvertisement(
std::unique_ptr<BluetoothAdvertisement::Data> advertisement_data,
BluetoothAdapter::CreateAdvertisementCallback callback,
BluetoothAdapter::AdvertisementErrorCallback error_callback) {
std::optional<BluetoothAdvertisement::ErrorCode> error_code;
const std::optional<BluetoothAdvertisement::UUIDList>& service_uuids =
advertisement_data->service_uuids();
if (!service_uuids || advertisement_data->manufacturer_data() ||
advertisement_data->solicit_uuids() ||
advertisement_data->service_data()) {
DVLOG(1) << "macOS only supports advertising service UUIDs.";
error_code = BluetoothAdvertisement::ERROR_UNSUPPORTED_PLATFORM;
}
if (active_advertisement_ && active_advertisement_->status() !=
BluetoothAdvertisementMac::UNREGISTERED) {
DVLOG(1) << "Only one active BLE advertisement is currently supported.";
error_code = BluetoothAdvertisement::ERROR_ADVERTISEMENT_ALREADY_EXISTS;
}
if (error_code) {
ui_task_runner_->PostTask(
FROM_HERE, base::BindOnce(std::move(error_callback), *error_code));
return;
}
active_advertisement_ = base::MakeRefCounted<BluetoothAdvertisementMac>(
std::move(service_uuids), std::move(callback), std::move(error_callback),
this);
OnPeripheralManagerStateChanged();
}
void BluetoothLowEnergyAdvertisementManagerMac::UnregisterAdvertisement(
BluetoothAdvertisementMac* advertisement,
BluetoothAdvertisement::SuccessCallback success_callback,
BluetoothAdvertisement::ErrorCallback error_callback) {
if (advertisement != active_advertisement_.get()) {
DVLOG(1) << "Cannot unregister none-active advertisement.";
ui_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(std::move(error_callback),
BluetoothAdvertisement::ERROR_RESET_ADVERTISING));
return;
}
active_advertisement_ = nullptr;
[peripheral_manager_ stopAdvertising];
ui_task_runner_->PostTask(FROM_HERE, std::move(success_callback));
}
void BluetoothLowEnergyAdvertisementManagerMac::DidStartAdvertising(
NSError* error) {
DCHECK(active_advertisement_ &&
active_advertisement_->is_advertisement_pending());
if (!active_advertisement_ ||
!active_advertisement_->is_advertisement_pending()) {
return;
}
if (error != nil) {
DVLOG(1) << "Error advertising: "
<< base::SysNSStringToUTF8(error.localizedDescription);
active_advertisement_->OnAdvertisementError(
ui_task_runner_.get(),
BluetoothAdvertisement::ERROR_STARTING_ADVERTISEMENT);
active_advertisement_ = nullptr;
return;
}
active_advertisement_->OnAdvertisementSuccess(ui_task_runner_.get());
}
} // device
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