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1 // Copyright (c) 2012 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 #ifndef CHROME_BROWSER_CHROMEOS_BLUETOOTH_BLUETOOTH_DEVICE_H_ | |
6 #define CHROME_BROWSER_CHROMEOS_BLUETOOTH_BLUETOOTH_DEVICE_H_ | |
7 | |
8 #include <string> | |
9 #include <vector> | |
10 | |
11 #include "base/callback.h" | |
12 #include "base/string16.h" | |
13 #include "base/memory/ref_counted.h" | |
14 | |
15 namespace chromeos { | |
16 | |
17 class BluetoothServiceRecord; | |
18 class BluetoothSocket; | |
19 | |
20 struct BluetoothOutOfBandPairingData; | |
21 | |
22 // BluetoothDevice represents a remote Bluetooth device, both its properties and | |
23 // capabilities as discovered by a local adapter and actions that may be | |
24 // performed on the remove device such as pairing, connection and disconnection. | |
25 // | |
26 // The class is instantiated and managed by the BluetoothAdapter class | |
27 // and pointers should only be obtained from that class and not cached, | |
28 // instead use the address() method as a unique key for a device. | |
29 // | |
30 // Since the lifecycle of BluetoothDevice instances is managed by | |
31 // BluetoothAdapter, that class rather than this provides observer methods | |
32 // for devices coming and going, as well as properties being updated. | |
33 class BluetoothDevice { | |
34 public: | |
35 // Possible values that may be returned by GetDeviceType(), representing | |
36 // different types of bluetooth device that we support or are aware of | |
37 // decoded from the bluetooth class information. | |
38 enum DeviceType { | |
39 DEVICE_UNKNOWN, | |
40 DEVICE_COMPUTER, | |
41 DEVICE_PHONE, | |
42 DEVICE_MODEM, | |
43 DEVICE_AUDIO, | |
44 DEVICE_CAR_AUDIO, | |
45 DEVICE_VIDEO, | |
46 DEVICE_PERIPHERAL, | |
47 DEVICE_JOYSTICK, | |
48 DEVICE_GAMEPAD, | |
49 DEVICE_KEYBOARD, | |
50 DEVICE_MOUSE, | |
51 DEVICE_TABLET, | |
52 DEVICE_KEYBOARD_MOUSE_COMBO | |
53 }; | |
54 | |
55 // Interface for observing changes from bluetooth devices. | |
56 class Observer { | |
57 public: | |
58 virtual ~Observer() {} | |
59 | |
60 // TODO(keybuk): add observers for pairing and connection. | |
61 }; | |
62 | |
63 // Interface for negotiating pairing of bluetooth devices. | |
64 class PairingDelegate { | |
65 public: | |
66 virtual ~PairingDelegate() {} | |
67 | |
68 // This method will be called when the Bluetooth daemon requires a | |
69 // PIN Code for authentication of the device |device|, the delegate should | |
70 // obtain the code from the user and call SetPinCode() on the device to | |
71 // provide it, or RejectPairing() or CancelPairing() to reject or cancel | |
72 // the request. | |
73 // | |
74 // PIN Codes are generally required for Bluetooth 2.0 and earlier devices | |
75 // for which there is no automatic pairing or special handling. | |
76 virtual void RequestPinCode(BluetoothDevice* device) = 0; | |
77 | |
78 // This method will be called when the Bluetooth daemon requires a | |
79 // Passkey for authentication of the device |device|, the delegate should | |
80 // obtain the passkey from the user (a numeric in the range 0-999999) and | |
81 // call SetPasskey() on the device to provide it, or RejectPairing() or | |
82 // CancelPairing() to reject or cancel the request. | |
83 // | |
84 // Passkeys are generally required for Bluetooth 2.1 and later devices | |
85 // which cannot provide input or display on their own, and don't accept | |
86 // passkey-less pairing. | |
87 virtual void RequestPasskey(BluetoothDevice* device) = 0; | |
88 | |
89 // This method will be called when the Bluetooth daemon requires that the | |
90 // user enter the PIN code |pincode| into the device |device| so that it | |
91 // may be authenticated. The DismissDisplayOrConfirm() method | |
92 // will be called to dismiss the display once pairing is complete or | |
93 // cancelled. | |
94 // | |
95 // This is used for Bluetooth 2.0 and earlier keyboard devices, the | |
96 // |pincode| will always be a six-digit numeric in the range 000000-999999 | |
97 // for compatibilty with later specifications. | |
98 virtual void DisplayPinCode(BluetoothDevice* device, | |
99 const std::string& pincode) = 0; | |
100 | |
101 // This method will be called when the Bluetooth daemon requires that the | |
102 // user enter the Passkey |passkey| into the device |device| so that it | |
103 // may be authenticated. The DismissDisplayOrConfirm() method will be | |
104 // called to dismiss the display once pairing is complete or cancelled. | |
105 // | |
106 // This is used for Bluetooth 2.1 and later devices that support input | |
107 // but not display, such as keyboards. The Passkey is a numeric in the | |
108 // range 0-999999 and should be always presented zero-padded to six | |
109 // digits. | |
110 virtual void DisplayPasskey(BluetoothDevice* device, | |
111 uint32 passkey) = 0; | |
112 | |
113 // This method will be called when the Bluetooth daemon requires that the | |
114 // user confirm that the Passkey |passkey| is displayed on the screen | |
115 // of the device |device| so that it may be authenticated. The delegate | |
116 // should display to the user and ask for confirmation, then call | |
117 // ConfirmPairing() on the device to confirm, RejectPairing() on the device | |
118 // to reject or CancelPairing() on the device to cancel authentication | |
119 // for any other reason. | |
120 // | |
121 // This is used for Bluetooth 2.1 and later devices that support display, | |
122 // such as other computers or phones. The Passkey is a numeric in the | |
123 // range 0-999999 and should be always present zero-padded to six | |
124 // digits. | |
125 virtual void ConfirmPasskey(BluetoothDevice* device, | |
126 uint32 passkey) = 0; | |
127 | |
128 // This method will be called when any previous DisplayPinCode(), | |
129 // DisplayPasskey() or ConfirmPasskey() request should be concluded | |
130 // and removed from the user. | |
131 virtual void DismissDisplayOrConfirm() = 0; | |
132 }; | |
133 | |
134 virtual ~BluetoothDevice(); | |
135 | |
136 // Returns the Bluetooth of address the device. This should be used as | |
137 // a unique key to identify the device and copied where needed. | |
138 virtual const std::string& address() const; | |
139 | |
140 // Returns the name of the device suitable for displaying, this may | |
141 // be a synthesied string containing the address and localized type name | |
142 // if the device has no obtained name. | |
143 virtual string16 GetName() const; | |
144 | |
145 // Returns the type of the device, limited to those we support or are | |
146 // aware of, by decoding the bluetooth class information. The returned | |
147 // values are unique, and do not overlap, so DEVICE_KEYBOARD is not also | |
148 // DEVICE_PERIPHERAL. | |
149 DeviceType GetDeviceType() const; | |
150 | |
151 // Indicates whether the device is paired to the adapter, whether or not | |
152 // that pairing is permanent or temporary. | |
153 virtual bool IsPaired() const = 0; | |
154 | |
155 // Indicates whether the device is visible to the adapter, this is not | |
156 // mutually exclusive to being paired. | |
157 virtual bool IsVisible() const; | |
158 | |
159 // Indicates whether the device is bonded to the adapter, bonding is | |
160 // formed by pairing and exchanging high-security link keys so that | |
161 // connections may be encrypted. | |
162 virtual bool IsBonded() const; | |
163 | |
164 // Indicates whether the device is currently connected to the adapter | |
165 // and at least one service available for use. | |
166 virtual bool IsConnected() const; | |
167 | |
168 // Returns the services (as UUID strings) that this device provides. | |
169 typedef std::vector<std::string> ServiceList; | |
170 virtual const ServiceList& GetServices() const = 0; | |
171 | |
172 // The ErrorCallback is used for methods that can fail in which case it | |
173 // is called, in the success case the callback is simply not called. | |
174 typedef base::Callback<void()> ErrorCallback; | |
175 | |
176 // Returns the services (as BluetoothServiceRecord objects) that this device | |
177 // provides. | |
178 typedef ScopedVector<BluetoothServiceRecord> ServiceRecordList; | |
179 typedef base::Callback<void(const ServiceRecordList&)> ServiceRecordsCallback; | |
180 virtual void GetServiceRecords(const ServiceRecordsCallback& callback, | |
181 const ErrorCallback& error_callback) = 0; | |
182 | |
183 // Indicates whether this device provides the given service. |uuid| should | |
184 // be in canonical form (see bluetooth_utils::CanonicalUuid). | |
185 virtual bool ProvidesServiceWithUUID(const std::string& uuid) const = 0; | |
186 | |
187 // The ProvidesServiceCallback is used by ProvidesServiceWithName to indicate | |
188 // whether or not a matching service was found. | |
189 typedef base::Callback<void(bool)> ProvidesServiceCallback; | |
190 | |
191 // Indicates whether this device provides the given service. | |
192 virtual void ProvidesServiceWithName( | |
193 const std::string& name, | |
194 const ProvidesServiceCallback& callback) = 0; | |
195 | |
196 // Indicates whether the device is currently pairing and expecting a | |
197 // PIN Code to be returned. | |
198 virtual bool ExpectingPinCode() const = 0; | |
199 | |
200 // Indicates whether the device is currently pairing and expecting a | |
201 // Passkey to be returned. | |
202 virtual bool ExpectingPasskey() const = 0; | |
203 | |
204 // Indicates whether the device is currently pairing and expecting | |
205 // confirmation of a displayed passkey. | |
206 virtual bool ExpectingConfirmation() const = 0; | |
207 | |
208 // SocketCallback is used by ConnectToService to return a BluetoothSocket to | |
209 // the caller, or NULL if there was an error. The socket will remain open | |
210 // until the last reference to the returned BluetoothSocket is released. | |
211 typedef base::Callback<void(scoped_refptr<BluetoothSocket>)> | |
212 SocketCallback; | |
213 | |
214 // Initiates a connection to the device, pairing first if necessary. | |
215 // | |
216 // Method calls will be made on the supplied object |pairing_delegate| | |
217 // to indicate what display, and in response should make method calls | |
218 // back to the device object. Not all devices require user responses | |
219 // during pairing, so it is normal for |pairing_delegate| to receive no | |
220 // calls. To explicitly force a low-security connection without bonding, | |
221 // pass NULL, though this is ignored if the device is already paired. | |
222 // | |
223 // If the request fails, |error_callback| will be called; otherwise, | |
224 // |callback| is called when the request is complete. | |
225 virtual void Connect(PairingDelegate* pairing_delegate, | |
226 const base::Closure& callback, | |
227 const ErrorCallback& error_callback) = 0; | |
228 | |
229 // Sends the PIN code |pincode| to the remote device during pairing. | |
230 // | |
231 // PIN Codes are generally required for Bluetooth 2.0 and earlier devices | |
232 // for which there is no automatic pairing or special handling. | |
233 virtual void SetPinCode(const std::string& pincode) = 0; | |
234 | |
235 // Sends the Passkey |passkey| to the remote device during pairing. | |
236 // | |
237 // Passkeys are generally required for Bluetooth 2.1 and later devices | |
238 // which cannot provide input or display on their own, and don't accept | |
239 // passkey-less pairing, and are a numeric in the range 0-999999. | |
240 virtual void SetPasskey(uint32 passkey) = 0; | |
241 | |
242 // Confirms to the remote device during pairing that a passkey provided by | |
243 // the ConfirmPasskey() delegate call is displayed on both devices. | |
244 virtual void ConfirmPairing() = 0; | |
245 | |
246 // Rejects a pairing or connection request from a remote device. | |
247 virtual void RejectPairing() = 0; | |
248 | |
249 // Cancels a pairing or connection attempt to a remote device. | |
250 virtual void CancelPairing() = 0; | |
251 | |
252 // Disconnects the device, terminating the low-level ACL connection | |
253 // and any application connections using it. Link keys and other pairing | |
254 // information are not discarded, and the device object is not deleted. | |
255 // If the request fails, |error_callback| will be called; otherwise, | |
256 // |callback| is called when the request is complete. | |
257 virtual void Disconnect(const base::Closure& callback, | |
258 const ErrorCallback& error_callback) = 0; | |
259 | |
260 // Disconnects the device, terminating the low-level ACL connection | |
261 // and any application connections using it, and then discards link keys | |
262 // and other pairing information. The device object remainds valid until | |
263 // returing from the calling function, after which it should be assumed to | |
264 // have been deleted. If the request fails, |error_callback| will be called. | |
265 // There is no callback for success beause this object is often deleted | |
266 // before that callback would be called. | |
267 virtual void Forget(const ErrorCallback& error_callback) = 0; | |
268 | |
269 // Attempts to open a socket to a service matching |uuid| on this device. If | |
270 // the connection is successful, |callback| is called with a BluetoothSocket. | |
271 // Otherwise |callback| is called with NULL. The socket is closed as soon as | |
272 // all references to the BluetoothSocket are released. Note that the | |
273 // BluetoothSocket object can outlive both this BluetoothDevice and the | |
274 // BluetoothAdapter for this device. | |
275 virtual void ConnectToService(const std::string& service_uuid, | |
276 const SocketCallback& callback) = 0; | |
277 | |
278 // Sets the Out Of Band pairing data for this device to |data|. Exactly one | |
279 // of |callback| or |error_callback| will be run. | |
280 virtual void SetOutOfBandPairingData( | |
281 const BluetoothOutOfBandPairingData& data, | |
282 const base::Closure& callback, | |
283 const ErrorCallback& error_callback) = 0; | |
284 | |
285 // Clears the Out Of Band pairing data for this device. Exactly one of | |
286 // |callback| or |error_callback| will be run. | |
287 virtual void ClearOutOfBandPairingData( | |
288 const base::Closure& callback, | |
289 const ErrorCallback& error_callback) = 0; | |
290 | |
291 protected: | |
292 BluetoothDevice(); | |
293 | |
294 // The Bluetooth class of the device, a bitmask that may be decoded using | |
295 // https://www.bluetooth.org/Technical/AssignedNumbers/baseband.htm | |
296 uint32 bluetooth_class_; | |
297 | |
298 // The name of the device, as supplied by the remote device. | |
299 std::string name_; | |
300 | |
301 // The Bluetooth address of the device. | |
302 std::string address_; | |
303 | |
304 // Tracked device state, updated by the adapter managing the lifecyle of | |
305 // the device. | |
306 bool visible_; | |
307 bool bonded_; | |
308 bool connected_; | |
309 | |
310 private: | |
311 // Returns a localized string containing the device's bluetooth address and | |
312 // a device type for display when |name_| is empty. | |
313 string16 GetAddressWithLocalizedDeviceTypeName() const; | |
314 }; | |
315 | |
316 } // namespace chromeos | |
317 | |
318 #endif // CHROME_BROWSER_CHROMEOS_BLUETOOTH_BLUETOOTH_DEVICE_H_ | |
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