1 //
2 // Copyright (C) 2015 Google, Inc.
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at:
7 //
8 // http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 //
16
17 #include "service/gatt_client.h"
18
19 #include <base/logging.h>
20
21 using std::lock_guard;
22 using std::mutex;
23
24 namespace bluetooth {
25
26 // GattClient implementation
27 // ========================================================
28
GattClient(const UUID & uuid,int client_id)29 GattClient::GattClient(const UUID& uuid, int client_id)
30 : app_identifier_(uuid),
31 client_id_(client_id) {
32 }
33
~GattClient()34 GattClient::~GattClient() {
35 // Automatically unregister the client.
36 VLOG(1) << "GattClient unregistering client: " << client_id_;
37
38 hal::BluetoothGattInterface::Get()->GetClientHALInterface()->
39 unregister_client(client_id_);
40 }
41
GetAppIdentifier() const42 const UUID& GattClient::GetAppIdentifier() const {
43 return app_identifier_;
44 }
45
GetInstanceId() const46 int GattClient::GetInstanceId() const {
47 return client_id_;
48 }
49
50 // GattClientFactory implementation
51 // ========================================================
52
GattClientFactory()53 GattClientFactory::GattClientFactory() {
54 hal::BluetoothGattInterface::Get()->AddClientObserver(this);
55 }
56
~GattClientFactory()57 GattClientFactory::~GattClientFactory() {
58 hal::BluetoothGattInterface::Get()->RemoveClientObserver(this);
59 }
60
RegisterInstance(const UUID & uuid,const RegisterCallback & callback)61 bool GattClientFactory::RegisterInstance(
62 const UUID& uuid,
63 const RegisterCallback& callback) {
64 VLOG(1) << __func__ << " - UUID: " << uuid.ToString();
65 lock_guard<mutex> lock(pending_calls_lock_);
66
67 if (pending_calls_.find(uuid) != pending_calls_.end()) {
68 LOG(ERROR) << "GATT client with given UUID already registered - "
69 << "UUID: " << uuid.ToString();
70 return false;
71 }
72
73 const btgatt_client_interface_t* hal_iface =
74 hal::BluetoothGattInterface::Get()->GetClientHALInterface();
75 bt_uuid_t app_uuid = uuid.GetBlueDroid();
76
77 if (hal_iface->register_client(&app_uuid) != BT_STATUS_SUCCESS)
78 return false;
79
80 pending_calls_[uuid] = callback;
81
82 return true;
83 }
84
RegisterClientCallback(hal::BluetoothGattInterface *,int status,int client_id,const bt_uuid_t & app_uuid)85 void GattClientFactory::RegisterClientCallback(
86 hal::BluetoothGattInterface* /* gatt_iface */,
87 int status, int client_id,
88 const bt_uuid_t& app_uuid) {
89 UUID uuid(app_uuid);
90
91 auto iter = pending_calls_.find(uuid);
92 if (iter == pending_calls_.end()) {
93 VLOG(1) << "Ignoring callback for unknown app_id: " << uuid.ToString();
94 return;
95 }
96
97 bool success = (status == BT_STATUS_SUCCESS);
98 BLEStatus result = success ? BLE_STATUS_SUCCESS : BLE_STATUS_FAILURE;
99
100 // No need to construct a client if the call wasn't successful.
101 std::unique_ptr<GattClient> client;
102 if (success)
103 client.reset(new GattClient(uuid, client_id));
104
105 // Notify the result via the result callback.
106 iter->second(result, uuid, std::move(client));
107
108 pending_calls_.erase(iter);
109 }
110
111 } // namespace bluetooth
112