1 // 2 // Copyright 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/low_energy_client.h" 18 19 #include <base/logging.h> 20 21 #include "service/adapter.h" 22 #include "service/logging_helpers.h" 23 #include "stack/include/bt_types.h" 24 #include "stack/include/hcidefs.h" 25 26 using std::lock_guard; 27 using std::mutex; 28 29 namespace bluetooth { 30 31 // LowEnergyClient implementation 32 // ======================================================== 33 34 LowEnergyClient::LowEnergyClient(Adapter& adapter, const Uuid& uuid, 35 int client_id) 36 : adapter_(adapter), 37 app_identifier_(uuid), 38 client_id_(client_id), 39 delegate_(nullptr) {} 40 41 LowEnergyClient::~LowEnergyClient() { 42 // Automatically unregister the client. 43 VLOG(1) << "LowEnergyClient unregistering client: " << client_id_; 44 45 // Unregister as observer so we no longer receive any callbacks. 46 hal::BluetoothGattInterface::Get()->RemoveClientObserver(this); 47 48 hal::BluetoothGattInterface::Get() 49 ->GetClientHALInterface() 50 ->unregister_client(client_id_); 51 } 52 53 bool LowEnergyClient::Connect(const std::string& address, bool is_direct) { 54 VLOG(2) << __func__ << "Address: " << address << " is_direct: " << is_direct; 55 56 RawAddress bda; 57 RawAddress::FromString(address, bda); 58 59 bt_status_t status = 60 hal::BluetoothGattInterface::Get()->GetClientHALInterface()->connect( 61 client_id_, bda, is_direct, BT_TRANSPORT_LE, false, PHY_LE_1M_MASK); 62 if (status != BT_STATUS_SUCCESS) { 63 LOG(ERROR) << "HAL call to connect failed"; 64 return false; 65 } 66 67 return true; 68 } 69 70 bool LowEnergyClient::Disconnect(const std::string& address) { 71 VLOG(2) << __func__ << "Address: " << address; 72 73 RawAddress bda; 74 RawAddress::FromString(address, bda); 75 76 std::map<const RawAddress, int>::iterator conn_id; 77 { 78 lock_guard<mutex> lock(connection_fields_lock_); 79 conn_id = connection_ids_.find(bda); 80 if (conn_id == connection_ids_.end()) { 81 LOG(WARNING) << "Can't disconnect, no existing connection to " << address; 82 return false; 83 } 84 } 85 86 bt_status_t status = 87 hal::BluetoothGattInterface::Get()->GetClientHALInterface()->disconnect( 88 client_id_, bda, conn_id->second); 89 if (status != BT_STATUS_SUCCESS) { 90 LOG(ERROR) << "HAL call to disconnect failed"; 91 return false; 92 } 93 94 return true; 95 } 96 97 bool LowEnergyClient::SetMtu(const std::string& address, int mtu) { 98 VLOG(2) << __func__ << "Address: " << address << " MTU: " << mtu; 99 100 RawAddress bda; 101 RawAddress::FromString(address, bda); 102 103 std::map<const RawAddress, int>::iterator conn_id; 104 { 105 lock_guard<mutex> lock(connection_fields_lock_); 106 conn_id = connection_ids_.find(bda); 107 if (conn_id == connection_ids_.end()) { 108 LOG(WARNING) << "Can't set MTU, no existing connection to " << address; 109 return false; 110 } 111 } 112 113 bt_status_t status = hal::BluetoothGattInterface::Get() 114 ->GetClientHALInterface() 115 ->configure_mtu(conn_id->second, mtu); 116 if (status != BT_STATUS_SUCCESS) { 117 LOG(ERROR) << "HAL call to set MTU failed"; 118 return false; 119 } 120 121 return true; 122 } 123 124 void LowEnergyClient::SetDelegate(Delegate* delegate) { 125 lock_guard<mutex> lock(delegate_mutex_); 126 delegate_ = delegate; 127 } 128 129 const Uuid& LowEnergyClient::GetAppIdentifier() const { 130 return app_identifier_; 131 } 132 133 int LowEnergyClient::GetInstanceId() const { return client_id_; } 134 135 void LowEnergyClient::ConnectCallback(hal::BluetoothGattInterface* gatt_iface, 136 int conn_id, int status, int client_id, 137 const RawAddress& bda) { 138 if (client_id != client_id_) return; 139 140 VLOG(1) << __func__ << "client_id: " << client_id << " status: " << status; 141 142 { 143 lock_guard<mutex> lock(connection_fields_lock_); 144 auto success = connection_ids_.emplace(bda, conn_id); 145 if (!success.second) { 146 LOG(ERROR) << __func__ << " Insertion into connection_ids_ failed!"; 147 } 148 } 149 150 if (delegate_) 151 delegate_->OnConnectionState(this, status, BtAddrString(&bda).c_str(), 152 true); 153 } 154 155 void LowEnergyClient::DisconnectCallback( 156 hal::BluetoothGattInterface* gatt_iface, int conn_id, int status, 157 int client_id, const RawAddress& bda) { 158 if (client_id != client_id_) return; 159 160 VLOG(1) << __func__ << " client_id: " << client_id << " status: " << status; 161 { 162 lock_guard<mutex> lock(connection_fields_lock_); 163 if (!connection_ids_.erase(bda)) { 164 LOG(ERROR) << __func__ << " Erasing from connection_ids_ failed!"; 165 } 166 } 167 168 if (delegate_) 169 delegate_->OnConnectionState(this, status, BtAddrString(&bda).c_str(), 170 false); 171 } 172 173 void LowEnergyClient::MtuChangedCallback( 174 hal::BluetoothGattInterface* gatt_iface, int conn_id, int status, int mtu) { 175 VLOG(1) << __func__ << " conn_id: " << conn_id << " status: " << status 176 << " mtu: " << mtu; 177 178 const RawAddress* bda = nullptr; 179 { 180 lock_guard<mutex> lock(connection_fields_lock_); 181 for (auto& connection : connection_ids_) { 182 if (connection.second == conn_id) { 183 bda = &connection.first; 184 break; 185 } 186 } 187 } 188 189 if (!bda) return; 190 191 const char* addr = BtAddrString(bda).c_str(); 192 if (delegate_) delegate_->OnMtuChanged(this, status, addr, mtu); 193 } 194 195 // LowEnergyClientFactory implementation 196 // ======================================================== 197 198 LowEnergyClientFactory::LowEnergyClientFactory(Adapter& adapter) 199 : adapter_(adapter) { 200 hal::BluetoothGattInterface::Get()->AddClientObserver(this); 201 } 202 203 LowEnergyClientFactory::~LowEnergyClientFactory() { 204 hal::BluetoothGattInterface::Get()->RemoveClientObserver(this); 205 } 206 207 bool LowEnergyClientFactory::RegisterInstance( 208 const Uuid& uuid, const RegisterCallback& callback) { 209 VLOG(1) << __func__ << " - Uuid: " << uuid.ToString(); 210 lock_guard<mutex> lock(pending_calls_lock_); 211 212 if (pending_calls_.find(uuid) != pending_calls_.end()) { 213 LOG(ERROR) << "Low-Energy client with given Uuid already registered - " 214 << "Uuid: " << uuid.ToString(); 215 return false; 216 } 217 218 const btgatt_client_interface_t* hal_iface = 219 hal::BluetoothGattInterface::Get()->GetClientHALInterface(); 220 221 if (hal_iface->register_client(uuid) != BT_STATUS_SUCCESS) return false; 222 223 pending_calls_[uuid] = callback; 224 225 return true; 226 } 227 228 void LowEnergyClientFactory::RegisterClientCallback( 229 hal::BluetoothGattInterface* gatt_iface, int status, int client_id, 230 const bluetooth::Uuid& app_uuid) { 231 Uuid uuid(app_uuid); 232 233 VLOG(1) << __func__ << " - Uuid: " << uuid.ToString(); 234 lock_guard<mutex> lock(pending_calls_lock_); 235 236 auto iter = pending_calls_.find(uuid); 237 if (iter == pending_calls_.end()) { 238 VLOG(1) << "Ignoring callback for unknown app_id: " << uuid.ToString(); 239 return; 240 } 241 242 // No need to construct a client if the call wasn't successful. 243 std::unique_ptr<LowEnergyClient> client; 244 BLEStatus result = BLE_STATUS_FAILURE; 245 if (status == BT_STATUS_SUCCESS) { 246 client.reset(new LowEnergyClient(adapter_, uuid, client_id)); 247 248 gatt_iface->AddClientObserver(client.get()); 249 250 result = BLE_STATUS_SUCCESS; 251 } 252 253 // Notify the result via the result callback. 254 iter->second(result, uuid, std::move(client)); 255 256 pending_calls_.erase(iter); 257 } 258 259 } // namespace bluetooth 260
