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| 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/bluez/bluetooth_gatt_notify_session_bluez.h" |
| 6 |
| 7 #include "base/bind.h" |
| 8 #include "base/logging.h" |
| 9 #include "device/bluetooth/bluetooth_adapter.h" |
| 10 #include "device/bluetooth/bluetooth_device.h" |
| 11 #include "device/bluetooth/bluetooth_remote_gatt_service.h" |
| 12 #include "device/bluetooth/bluez/bluetooth_remote_gatt_characteristic_bluez.h" |
| 13 #include "device/bluetooth/dbus/bluez_dbus_manager.h" |
| 14 |
| 15 namespace bluez { |
| 16 |
| 17 BluetoothGattNotifySessionBlueZ::BluetoothGattNotifySessionBlueZ( |
| 18 scoped_refptr<device::BluetoothAdapter> adapter, |
| 19 const std::string& device_address, |
| 20 const std::string& service_identifier, |
| 21 const std::string& characteristic_identifier, |
| 22 const dbus::ObjectPath& characteristic_path) |
| 23 : active_(true), |
| 24 adapter_(adapter), |
| 25 device_address_(device_address), |
| 26 service_id_(service_identifier), |
| 27 characteristic_id_(characteristic_identifier), |
| 28 object_path_(characteristic_path) { |
| 29 DCHECK(adapter_.get()); |
| 30 DCHECK(!device_address_.empty()); |
| 31 DCHECK(!service_id_.empty()); |
| 32 DCHECK(!characteristic_id_.empty()); |
| 33 DCHECK(object_path_.IsValid()); |
| 34 |
| 35 bluez::BluezDBusManager::Get() |
| 36 ->GetBluetoothGattCharacteristicClient() |
| 37 ->AddObserver(this); |
| 38 } |
| 39 |
| 40 BluetoothGattNotifySessionBlueZ::~BluetoothGattNotifySessionBlueZ() { |
| 41 bluez::BluezDBusManager::Get() |
| 42 ->GetBluetoothGattCharacteristicClient() |
| 43 ->RemoveObserver(this); |
| 44 Stop(base::Bind(&base::DoNothing)); |
| 45 } |
| 46 |
| 47 std::string BluetoothGattNotifySessionBlueZ::GetCharacteristicIdentifier() |
| 48 const { |
| 49 return characteristic_id_; |
| 50 } |
| 51 |
| 52 bool BluetoothGattNotifySessionBlueZ::IsActive() { |
| 53 // Determine if the session is active. If |active_| is false, then it's |
| 54 // been explicitly marked, so return false. |
| 55 if (!active_) |
| 56 return false; |
| 57 |
| 58 // The fact that |active_| is true doesn't mean that the session is |
| 59 // actually active, since the characteristic might have stopped sending |
| 60 // notifications yet this method was called before we processed the |
| 61 // observer event (e.g. because somebody else called this method in their |
| 62 // bluez::BluetoothGattCharacteristicClient::Observer implementation, which |
| 63 // was |
| 64 // called before ours). Check the client to see if notifications are still |
| 65 // being sent. |
| 66 bluez::BluetoothGattCharacteristicClient::Properties* properties = |
| 67 bluez::BluezDBusManager::Get() |
| 68 ->GetBluetoothGattCharacteristicClient() |
| 69 ->GetProperties(object_path_); |
| 70 if (!properties || !properties->notifying.value()) |
| 71 active_ = false; |
| 72 |
| 73 return active_; |
| 74 } |
| 75 |
| 76 void BluetoothGattNotifySessionBlueZ::Stop(const base::Closure& callback) { |
| 77 if (!active_) { |
| 78 VLOG(1) << "Notify session already inactive."; |
| 79 callback.Run(); |
| 80 return; |
| 81 } |
| 82 |
| 83 // Mark this session as inactive no matter what. |
| 84 active_ = false; |
| 85 |
| 86 device::BluetoothDevice* device = adapter_->GetDevice(device_address_); |
| 87 if (!device) |
| 88 return; |
| 89 |
| 90 device::BluetoothRemoteGattService* service = |
| 91 device->GetGattService(service_id_); |
| 92 if (!service) |
| 93 return; |
| 94 |
| 95 BluetoothRemoteGattCharacteristicBlueZ* chrc = |
| 96 static_cast<BluetoothRemoteGattCharacteristicBlueZ*>( |
| 97 service->GetCharacteristic(characteristic_id_)); |
| 98 if (!chrc) |
| 99 return; |
| 100 |
| 101 chrc->RemoveNotifySession(callback); |
| 102 } |
| 103 |
| 104 void BluetoothGattNotifySessionBlueZ::GattCharacteristicRemoved( |
| 105 const dbus::ObjectPath& object_path) { |
| 106 if (object_path != object_path_) |
| 107 return; |
| 108 |
| 109 active_ = false; |
| 110 } |
| 111 |
| 112 void BluetoothGattNotifySessionBlueZ::GattCharacteristicPropertyChanged( |
| 113 const dbus::ObjectPath& object_path, |
| 114 const std::string& property_name) { |
| 115 if (object_path != object_path_) |
| 116 return; |
| 117 |
| 118 if (!active_) |
| 119 return; |
| 120 |
| 121 bluez::BluetoothGattCharacteristicClient::Properties* properties = |
| 122 bluez::BluezDBusManager::Get() |
| 123 ->GetBluetoothGattCharacteristicClient() |
| 124 ->GetProperties(object_path_); |
| 125 if (!properties) { |
| 126 active_ = false; |
| 127 return; |
| 128 } |
| 129 |
| 130 if (property_name == properties->notifying.name() && |
| 131 !properties->notifying.value()) |
| 132 active_ = false; |
| 133 } |
| 134 |
| 135 } // namespace bluez |
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