blob: cc127c33b4d9ac32f5ae08c9f64d6a8e0d1be3d0 [file] [log] [blame]
//
// Copyright 2015 Google, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "service/low_energy_client.h"
#include <base/logging.h>
#include "service/adapter.h"
#include "service/logging_helpers.h"
#include "stack/include/bt_types.h"
#include "stack/include/hcidefs.h"
using std::lock_guard;
using std::mutex;
namespace bluetooth {
// LowEnergyClient implementation
// ========================================================
LowEnergyClient::LowEnergyClient(Adapter& adapter, const Uuid& uuid,
int client_id)
: adapter_(adapter),
app_identifier_(uuid),
client_id_(client_id),
delegate_(nullptr) {}
LowEnergyClient::~LowEnergyClient() {
// Automatically unregister the client.
VLOG(1) << "LowEnergyClient unregistering client: " << client_id_;
// Unregister as observer so we no longer receive any callbacks.
hal::BluetoothGattInterface::Get()->RemoveClientObserver(this);
hal::BluetoothGattInterface::Get()
->GetClientHALInterface()
->unregister_client(client_id_);
}
bool LowEnergyClient::Connect(const std::string& address, bool is_direct) {
VLOG(2) << __func__ << "Address: " << address << " is_direct: " << is_direct;
RawAddress bda;
RawAddress::FromString(address, bda);
bt_status_t status =
hal::BluetoothGattInterface::Get()->GetClientHALInterface()->connect(
client_id_, bda, is_direct, BT_TRANSPORT_LE, false, PHY_LE_1M_MASK);
if (status != BT_STATUS_SUCCESS) {
LOG(ERROR) << "HAL call to connect failed";
return false;
}
return true;
}
bool LowEnergyClient::Disconnect(const std::string& address) {
VLOG(2) << __func__ << "Address: " << address;
RawAddress bda;
RawAddress::FromString(address, bda);
std::map<const RawAddress, int>::iterator conn_id;
{
lock_guard<mutex> lock(connection_fields_lock_);
conn_id = connection_ids_.find(bda);
if (conn_id == connection_ids_.end()) {
LOG(WARNING) << "Can't disconnect, no existing connection to " << address;
return false;
}
}
bt_status_t status =
hal::BluetoothGattInterface::Get()->GetClientHALInterface()->disconnect(
client_id_, bda, conn_id->second);
if (status != BT_STATUS_SUCCESS) {
LOG(ERROR) << "HAL call to disconnect failed";
return false;
}
return true;
}
bool LowEnergyClient::SetMtu(const std::string& address, int mtu) {
VLOG(2) << __func__ << "Address: " << address << " MTU: " << mtu;
RawAddress bda;
RawAddress::FromString(address, bda);
std::map<const RawAddress, int>::iterator conn_id;
{
lock_guard<mutex> lock(connection_fields_lock_);
conn_id = connection_ids_.find(bda);
if (conn_id == connection_ids_.end()) {
LOG(WARNING) << "Can't set MTU, no existing connection to " << address;
return false;
}
}
bt_status_t status = hal::BluetoothGattInterface::Get()
->GetClientHALInterface()
->configure_mtu(conn_id->second, mtu);
if (status != BT_STATUS_SUCCESS) {
LOG(ERROR) << "HAL call to set MTU failed";
return false;
}
return true;
}
void LowEnergyClient::SetDelegate(Delegate* delegate) {
lock_guard<mutex> lock(delegate_mutex_);
delegate_ = delegate;
}
const Uuid& LowEnergyClient::GetAppIdentifier() const {
return app_identifier_;
}
int LowEnergyClient::GetInstanceId() const { return client_id_; }
void LowEnergyClient::ConnectCallback(hal::BluetoothGattInterface* gatt_iface,
int conn_id, int status, int client_id,
const RawAddress& bda) {
if (client_id != client_id_) return;
VLOG(1) << __func__ << "client_id: " << client_id << " status: " << status;
{
lock_guard<mutex> lock(connection_fields_lock_);
auto success = connection_ids_.emplace(bda, conn_id);
if (!success.second) {
LOG(ERROR) << __func__ << " Insertion into connection_ids_ failed!";
}
}
if (delegate_)
delegate_->OnConnectionState(this, status, BtAddrString(&bda).c_str(),
true);
}
void LowEnergyClient::DisconnectCallback(
hal::BluetoothGattInterface* gatt_iface, int conn_id, int status,
int client_id, const RawAddress& bda) {
if (client_id != client_id_) return;
VLOG(1) << __func__ << " client_id: " << client_id << " status: " << status;
{
lock_guard<mutex> lock(connection_fields_lock_);
if (!connection_ids_.erase(bda)) {
LOG(ERROR) << __func__ << " Erasing from connection_ids_ failed!";
}
}
if (delegate_)
delegate_->OnConnectionState(this, status, BtAddrString(&bda).c_str(),
false);
}
void LowEnergyClient::MtuChangedCallback(
hal::BluetoothGattInterface* gatt_iface, int conn_id, int status, int mtu) {
VLOG(1) << __func__ << " conn_id: " << conn_id << " status: " << status
<< " mtu: " << mtu;
const RawAddress* bda = nullptr;
{
lock_guard<mutex> lock(connection_fields_lock_);
for (auto& connection : connection_ids_) {
if (connection.second == conn_id) {
bda = &connection.first;
break;
}
}
}
if (!bda) return;
const char* addr = BtAddrString(bda).c_str();
if (delegate_) delegate_->OnMtuChanged(this, status, addr, mtu);
}
// LowEnergyClientFactory implementation
// ========================================================
LowEnergyClientFactory::LowEnergyClientFactory(Adapter& adapter)
: adapter_(adapter) {
hal::BluetoothGattInterface::Get()->AddClientObserver(this);
}
LowEnergyClientFactory::~LowEnergyClientFactory() {
hal::BluetoothGattInterface::Get()->RemoveClientObserver(this);
}
bool LowEnergyClientFactory::RegisterInstance(
const Uuid& uuid, const RegisterCallback& callback) {
VLOG(1) << __func__ << " - Uuid: " << uuid.ToString();
lock_guard<mutex> lock(pending_calls_lock_);
if (pending_calls_.find(uuid) != pending_calls_.end()) {
LOG(ERROR) << "Low-Energy client with given Uuid already registered - "
<< "Uuid: " << uuid.ToString();
return false;
}
const btgatt_client_interface_t* hal_iface =
hal::BluetoothGattInterface::Get()->GetClientHALInterface();
if (hal_iface->register_client(uuid) != BT_STATUS_SUCCESS) return false;
pending_calls_[uuid] = callback;
return true;
}
void LowEnergyClientFactory::RegisterClientCallback(
hal::BluetoothGattInterface* gatt_iface, int status, int client_id,
const bluetooth::Uuid& app_uuid) {
Uuid uuid(app_uuid);
VLOG(1) << __func__ << " - Uuid: " << uuid.ToString();
lock_guard<mutex> lock(pending_calls_lock_);
auto iter = pending_calls_.find(uuid);
if (iter == pending_calls_.end()) {
VLOG(1) << "Ignoring callback for unknown app_id: " << uuid.ToString();
return;
}
// No need to construct a client if the call wasn't successful.
std::unique_ptr<LowEnergyClient> client;
BLEStatus result = BLE_STATUS_FAILURE;
if (status == BT_STATUS_SUCCESS) {
client.reset(new LowEnergyClient(adapter_, uuid, client_id));
gatt_iface->AddClientObserver(client.get());
result = BLE_STATUS_SUCCESS;
}
// Notify the result via the result callback.
iter->second(result, uuid, std::move(client));
pending_calls_.erase(iter);
}
} // namespace bluetooth