1 // Copyright 2013 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 "chromeos/dbus/bluetooth_adapter_client.h"
6
7 #include "base/bind.h"
8 #include "base/logging.h"
9 #include "dbus/bus.h"
10 #include "dbus/message.h"
11 #include "dbus/object_manager.h"
12 #include "dbus/object_path.h"
13 #include "dbus/object_proxy.h"
14 #include "third_party/cros_system_api/dbus/service_constants.h"
15
16 namespace chromeos {
17
18 const char BluetoothAdapterClient::kNoResponseError[] =
19 "org.chromium.Error.NoResponse";
20 const char BluetoothAdapterClient::kUnknownAdapterError[] =
21 "org.chromium.Error.UnknownAdapter";
22
Properties(dbus::ObjectProxy * object_proxy,const std::string & interface_name,const PropertyChangedCallback & callback)23 BluetoothAdapterClient::Properties::Properties(
24 dbus::ObjectProxy* object_proxy,
25 const std::string& interface_name,
26 const PropertyChangedCallback& callback)
27 : dbus::PropertySet(object_proxy, interface_name, callback) {
28 RegisterProperty(bluetooth_adapter::kAddressProperty, &address);
29 RegisterProperty(bluetooth_adapter::kNameProperty, &name);
30 RegisterProperty(bluetooth_adapter::kAliasProperty, &alias);
31 RegisterProperty(bluetooth_adapter::kClassProperty, &bluetooth_class);
32 RegisterProperty(bluetooth_adapter::kPoweredProperty, &powered);
33 RegisterProperty(bluetooth_adapter::kDiscoverableProperty, &discoverable);
34 RegisterProperty(bluetooth_adapter::kPairableProperty, &pairable);
35 RegisterProperty(bluetooth_adapter::kPairableTimeoutProperty,
36 &pairable_timeout);
37 RegisterProperty(bluetooth_adapter::kDiscoverableTimeoutProperty,
38 &discoverable_timeout);
39 RegisterProperty(bluetooth_adapter::kDiscoveringProperty, &discovering);
40 RegisterProperty(bluetooth_adapter::kUUIDsProperty, &uuids);
41 RegisterProperty(bluetooth_adapter::kModaliasProperty, &modalias);
42 }
43
~Properties()44 BluetoothAdapterClient::Properties::~Properties() {
45 }
46
47
48 // The BluetoothAdapterClient implementation used in production.
49 class BluetoothAdapterClientImpl
50 : public BluetoothAdapterClient,
51 public dbus::ObjectManager::Interface {
52 public:
BluetoothAdapterClientImpl()53 BluetoothAdapterClientImpl() : weak_ptr_factory_(this) {}
54
~BluetoothAdapterClientImpl()55 virtual ~BluetoothAdapterClientImpl() {
56 object_manager_->UnregisterInterface(
57 bluetooth_adapter::kBluetoothAdapterInterface);
58 }
59
60 // BluetoothAdapterClient override.
AddObserver(BluetoothAdapterClient::Observer * observer)61 virtual void AddObserver(BluetoothAdapterClient::Observer* observer)
62 OVERRIDE {
63 DCHECK(observer);
64 observers_.AddObserver(observer);
65 }
66
67 // BluetoothAdapterClient override.
RemoveObserver(BluetoothAdapterClient::Observer * observer)68 virtual void RemoveObserver(BluetoothAdapterClient::Observer* observer)
69 OVERRIDE {
70 DCHECK(observer);
71 observers_.RemoveObserver(observer);
72 }
73
74 // Returns the list of adapter object paths known to the system.
GetAdapters()75 virtual std::vector<dbus::ObjectPath> GetAdapters() OVERRIDE {
76 return object_manager_->GetObjectsWithInterface(
77 bluetooth_adapter::kBluetoothAdapterInterface);
78 }
79
80 // dbus::ObjectManager::Interface override.
CreateProperties(dbus::ObjectProxy * object_proxy,const dbus::ObjectPath & object_path,const std::string & interface_name)81 virtual dbus::PropertySet* CreateProperties(
82 dbus::ObjectProxy* object_proxy,
83 const dbus::ObjectPath& object_path,
84 const std::string& interface_name) OVERRIDE {
85 Properties* properties = new Properties(
86 object_proxy,
87 interface_name,
88 base::Bind(&BluetoothAdapterClientImpl::OnPropertyChanged,
89 weak_ptr_factory_.GetWeakPtr(),
90 object_path));
91 return static_cast<dbus::PropertySet*>(properties);
92 }
93
94 // BluetoothAdapterClient override.
GetProperties(const dbus::ObjectPath & object_path)95 virtual Properties* GetProperties(const dbus::ObjectPath& object_path)
96 OVERRIDE {
97 return static_cast<Properties*>(
98 object_manager_->GetProperties(
99 object_path,
100 bluetooth_adapter::kBluetoothAdapterInterface));
101 }
102
103 // BluetoothAdapterClient override.
StartDiscovery(const dbus::ObjectPath & object_path,const base::Closure & callback,const ErrorCallback & error_callback)104 virtual void StartDiscovery(const dbus::ObjectPath& object_path,
105 const base::Closure& callback,
106 const ErrorCallback& error_callback) OVERRIDE {
107 dbus::MethodCall method_call(
108 bluetooth_adapter::kBluetoothAdapterInterface,
109 bluetooth_adapter::kStartDiscovery);
110
111 dbus::ObjectProxy* object_proxy =
112 object_manager_->GetObjectProxy(object_path);
113 if (!object_proxy) {
114 error_callback.Run(kUnknownAdapterError, "");
115 return;
116 }
117
118 object_proxy->CallMethodWithErrorCallback(
119 &method_call,
120 dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
121 base::Bind(&BluetoothAdapterClientImpl::OnSuccess,
122 weak_ptr_factory_.GetWeakPtr(), callback),
123 base::Bind(&BluetoothAdapterClientImpl::OnError,
124 weak_ptr_factory_.GetWeakPtr(), error_callback));
125 }
126
127 // BluetoothAdapterClient override.
StopDiscovery(const dbus::ObjectPath & object_path,const base::Closure & callback,const ErrorCallback & error_callback)128 virtual void StopDiscovery(const dbus::ObjectPath& object_path,
129 const base::Closure& callback,
130 const ErrorCallback& error_callback) OVERRIDE {
131 dbus::MethodCall method_call(
132 bluetooth_adapter::kBluetoothAdapterInterface,
133 bluetooth_adapter::kStopDiscovery);
134
135 dbus::ObjectProxy* object_proxy =
136 object_manager_->GetObjectProxy(object_path);
137 if (!object_proxy) {
138 error_callback.Run(kUnknownAdapterError, "");
139 return;
140 }
141
142 object_proxy->CallMethodWithErrorCallback(
143 &method_call,
144 dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
145 base::Bind(&BluetoothAdapterClientImpl::OnSuccess,
146 weak_ptr_factory_.GetWeakPtr(), callback),
147 base::Bind(&BluetoothAdapterClientImpl::OnError,
148 weak_ptr_factory_.GetWeakPtr(), error_callback));
149 }
150
151 // BluetoothAdapterClient override.
RemoveDevice(const dbus::ObjectPath & object_path,const dbus::ObjectPath & device_path,const base::Closure & callback,const ErrorCallback & error_callback)152 virtual void RemoveDevice(const dbus::ObjectPath& object_path,
153 const dbus::ObjectPath& device_path,
154 const base::Closure& callback,
155 const ErrorCallback& error_callback) OVERRIDE {
156 dbus::MethodCall method_call(
157 bluetooth_adapter::kBluetoothAdapterInterface,
158 bluetooth_adapter::kRemoveDevice);
159
160 dbus::MessageWriter writer(&method_call);
161 writer.AppendObjectPath(device_path);
162
163 dbus::ObjectProxy* object_proxy =
164 object_manager_->GetObjectProxy(object_path);
165 if (!object_proxy) {
166 error_callback.Run(kUnknownAdapterError, "");
167 return;
168 }
169
170 object_proxy->CallMethodWithErrorCallback(
171 &method_call,
172 dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
173 base::Bind(&BluetoothAdapterClientImpl::OnSuccess,
174 weak_ptr_factory_.GetWeakPtr(), callback),
175 base::Bind(&BluetoothAdapterClientImpl::OnError,
176 weak_ptr_factory_.GetWeakPtr(), error_callback));
177 }
178
179 protected:
Init(dbus::Bus * bus)180 virtual void Init(dbus::Bus* bus) OVERRIDE {
181 object_manager_ = bus->GetObjectManager(
182 bluetooth_object_manager::kBluetoothObjectManagerServiceName,
183 dbus::ObjectPath(
184 bluetooth_object_manager::kBluetoothObjectManagerServicePath));
185 object_manager_->RegisterInterface(
186 bluetooth_adapter::kBluetoothAdapterInterface, this);
187 }
188
189 private:
190 // Called by dbus::ObjectManager when an object with the adapter interface
191 // is created. Informs observers.
ObjectAdded(const dbus::ObjectPath & object_path,const std::string & interface_name)192 virtual void ObjectAdded(const dbus::ObjectPath& object_path,
193 const std::string& interface_name) OVERRIDE {
194 FOR_EACH_OBSERVER(BluetoothAdapterClient::Observer, observers_,
195 AdapterAdded(object_path));
196 }
197
198 // Called by dbus::ObjectManager when an object with the adapter interface
199 // is removed. Informs observers.
ObjectRemoved(const dbus::ObjectPath & object_path,const std::string & interface_name)200 virtual void ObjectRemoved(const dbus::ObjectPath& object_path,
201 const std::string& interface_name) OVERRIDE {
202 FOR_EACH_OBSERVER(BluetoothAdapterClient::Observer, observers_,
203 AdapterRemoved(object_path));
204 }
205
206 // Called by dbus::PropertySet when a property value is changed,
207 // either by result of a signal or response to a GetAll() or Get()
208 // call. Informs observers.
OnPropertyChanged(const dbus::ObjectPath & object_path,const std::string & property_name)209 void OnPropertyChanged(const dbus::ObjectPath& object_path,
210 const std::string& property_name) {
211 FOR_EACH_OBSERVER(BluetoothAdapterClient::Observer, observers_,
212 AdapterPropertyChanged(object_path, property_name));
213 }
214
215 // Called when a response for successful method call is received.
OnSuccess(const base::Closure & callback,dbus::Response * response)216 void OnSuccess(const base::Closure& callback,
217 dbus::Response* response) {
218 DCHECK(response);
219 callback.Run();
220 }
221
222 // Called when a response for a failed method call is received.
OnError(const ErrorCallback & error_callback,dbus::ErrorResponse * response)223 void OnError(const ErrorCallback& error_callback,
224 dbus::ErrorResponse* response) {
225 // Error response has optional error message argument.
226 std::string error_name;
227 std::string error_message;
228 if (response) {
229 dbus::MessageReader reader(response);
230 error_name = response->GetErrorName();
231 reader.PopString(&error_message);
232 } else {
233 error_name = kNoResponseError;
234 error_message = "";
235 }
236 error_callback.Run(error_name, error_message);
237 }
238
239 dbus::ObjectManager* object_manager_;
240
241 // List of observers interested in event notifications from us.
242 ObserverList<BluetoothAdapterClient::Observer> observers_;
243
244 // Weak pointer factory for generating 'this' pointers that might live longer
245 // than we do.
246 // Note: This should remain the last member so it'll be destroyed and
247 // invalidate its weak pointers before any other members are destroyed.
248 base::WeakPtrFactory<BluetoothAdapterClientImpl>
249 weak_ptr_factory_;
250
251 DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterClientImpl);
252 };
253
BluetoothAdapterClient()254 BluetoothAdapterClient::BluetoothAdapterClient() {
255 }
256
~BluetoothAdapterClient()257 BluetoothAdapterClient::~BluetoothAdapterClient() {
258 }
259
Create()260 BluetoothAdapterClient* BluetoothAdapterClient::Create() {
261 return new BluetoothAdapterClientImpl;
262 }
263
264 } // namespace chromeos
265