| // |
| // Copyright (C) 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/gatt_server.h" |
| |
| #include "service/common/bluetooth/util/address_helper.h" |
| #include "service/hal/gatt_helpers.h" |
| #include "service/logging_helpers.h" |
| |
| using std::lock_guard; |
| using std::mutex; |
| |
| namespace bluetooth { |
| |
| namespace { |
| |
| bool operator==(const bt_bdaddr_t& lhs, const bt_bdaddr_t& rhs) { |
| return memcmp(&lhs, &rhs, sizeof(lhs)) == 0; |
| } |
| |
| bool operator!=(const bt_bdaddr_t& lhs, const bt_bdaddr_t& rhs) { |
| return !(lhs == rhs); |
| } |
| |
| } // namespace |
| |
| // GattServer implementation |
| // ======================================================== |
| |
| GattServer::GattServer(const UUID& uuid, int server_id) |
| : app_identifier_(uuid), |
| server_id_(server_id), |
| delegate_(nullptr) { |
| } |
| |
| GattServer::~GattServer() { |
| // Automatically unregister the server. |
| VLOG(1) << "GattServer unregistering: " << server_id_; |
| |
| // Unregister as observer so we no longer receive any callbacks. |
| hal::BluetoothGattInterface::Get()->RemoveServerObserver(this); |
| |
| // Unregister this server, stop all services, and ignore the result. |
| // TODO(armansito): stop and remove all services here? unregister_server |
| // should really take care of that. |
| hal::BluetoothGattInterface::Get()-> |
| GetServerHALInterface()->unregister_server(server_id_); |
| } |
| |
| void GattServer::SetDelegate(Delegate* delegate) { |
| lock_guard<mutex> lock(mutex_); |
| delegate_ = delegate; |
| } |
| |
| const UUID& GattServer::GetAppIdentifier() const { |
| return app_identifier_; |
| } |
| |
| int GattServer::GetInstanceId() const { |
| return server_id_; |
| } |
| |
| std::unique_ptr<GattIdentifier> GattServer::BeginServiceDeclaration( |
| const UUID& uuid, bool is_primary) { |
| VLOG(1) << __func__ << " server_id: " << server_id_ |
| << " - UUID: " << uuid.ToString() |
| << ", is_primary: " << is_primary; |
| lock_guard<mutex> lock(mutex_); |
| |
| if (pending_decl_) { |
| LOG(ERROR) << "Already began service declaration"; |
| return nullptr; |
| } |
| |
| CHECK(!pending_id_); |
| CHECK(!pending_decl_); |
| CHECK(!pending_end_decl_cb_); |
| |
| auto service_id = GetIdForService(uuid, is_primary); |
| CHECK(service_id); |
| |
| // Pass 0 for permissions and properties as this is a service decl. |
| AttributeEntry entry( |
| *service_id, kCharacteristicPropertyNone, kAttributePermissionNone); |
| |
| pending_decl_.reset(new ServiceDeclaration()); |
| pending_decl_->num_handles++; // 1 handle for the service decl. attribute |
| pending_decl_->service_id = *service_id; |
| pending_decl_->attributes.push_back(entry); |
| |
| return service_id; |
| } |
| |
| std::unique_ptr<GattIdentifier> GattServer::AddCharacteristic( |
| const UUID& uuid, int properties, int permissions) { |
| VLOG(1) << __func__ << " server_id: " << server_id_ |
| << " - UUID: " << uuid.ToString() |
| << ", properties: " << properties |
| << ", permissions: " << permissions; |
| lock_guard<mutex> lock(mutex_); |
| |
| if (!pending_decl_) { |
| LOG(ERROR) << "Service declaration not begun"; |
| return nullptr; |
| } |
| |
| if (pending_end_decl_cb_) { |
| LOG(ERROR) << "EndServiceDeclaration in progress, cannot modify service"; |
| return nullptr; |
| } |
| |
| auto char_id = GetIdForCharacteristic(uuid); |
| CHECK(char_id); |
| AttributeEntry entry(*char_id, properties, permissions); |
| |
| // 2 handles for the characteristic declaration and the value attributes. |
| pending_decl_->num_handles += 2; |
| pending_decl_->attributes.push_back(entry); |
| |
| return char_id; |
| } |
| |
| std::unique_ptr<GattIdentifier> GattServer::AddDescriptor( |
| const UUID& uuid, int permissions) { |
| VLOG(1) << __func__ << " server_id: " << server_id_ |
| << " - UUID: " << uuid.ToString() |
| << ", permissions: " << permissions; |
| lock_guard<mutex> lock(mutex_); |
| |
| if (!pending_decl_) { |
| LOG(ERROR) << "Service declaration not begun"; |
| return nullptr; |
| } |
| |
| if (pending_end_decl_cb_) { |
| LOG(ERROR) << "EndServiceDeclaration in progress, cannot modify service"; |
| return nullptr; |
| } |
| |
| auto desc_id = GetIdForDescriptor(uuid); |
| if (!desc_id) |
| return nullptr; |
| |
| AttributeEntry entry(*desc_id, kCharacteristicPropertyNone, permissions); |
| |
| // 1 handle for the descriptor attribute. |
| pending_decl_->num_handles += 1; |
| pending_decl_->attributes.push_back(entry); |
| |
| return desc_id; |
| } |
| |
| bool GattServer::EndServiceDeclaration(const ResultCallback& callback) { |
| VLOG(1) << __func__ << " server_id: " << server_id_; |
| lock_guard<mutex> lock(mutex_); |
| |
| if (!callback) { |
| LOG(ERROR) << "|callback| cannot be NULL"; |
| return false; |
| } |
| |
| if (!pending_decl_) { |
| LOG(ERROR) << "Service declaration not begun"; |
| return false; |
| } |
| |
| if (pending_end_decl_cb_) { |
| LOG(ERROR) << "EndServiceDeclaration already in progress"; |
| return false; |
| } |
| |
| CHECK(!pending_id_); |
| |
| // There has to be at least one entry here for the service declaration |
| // attribute. |
| CHECK(pending_decl_->num_handles > 0); |
| CHECK(!pending_decl_->attributes.empty()); |
| |
| std::unique_ptr<GattIdentifier> service_id = PopNextId(); |
| CHECK(service_id->IsService()); |
| CHECK(*service_id == pending_decl_->service_id); |
| |
| btgatt_srvc_id_t hal_id; |
| hal::GetHALServiceId(*service_id, &hal_id); |
| |
| bt_status_t status = hal::BluetoothGattInterface::Get()-> |
| GetServerHALInterface()->add_service( |
| server_id_, &hal_id, pending_decl_->num_handles); |
| if (status != BT_STATUS_SUCCESS) { |
| LOG(ERROR) << "Failed to initiate call to populate GATT service"; |
| CleanUpPendingData(); |
| return false; |
| } |
| |
| pending_id_ = std::move(service_id); |
| pending_end_decl_cb_ = callback; |
| |
| return true; |
| } |
| |
| std::unique_ptr<GattIdentifier> GattServer::GetIdForService( |
| const UUID& uuid, bool is_primary) { |
| // Calculate the instance ID for this service by searching through the handle |
| // map to see how many occurrences of the same service UUID we find. |
| int inst_id = 0; |
| for (const auto& iter : id_to_handle_map_) { |
| const GattIdentifier* gatt_id = &iter.first; |
| |
| if (!gatt_id->IsService()) |
| continue; |
| |
| if (gatt_id->service_uuid() == uuid) |
| ++inst_id; |
| } |
| |
| // Pass empty string for the address as this is a local service. |
| return GattIdentifier::CreateServiceId("", inst_id, uuid, is_primary); |
| } |
| |
| std::unique_ptr<GattIdentifier> GattServer::GetIdForCharacteristic( |
| const UUID& uuid) { |
| CHECK(pending_decl_); |
| |
| // Calculate the instance ID for this characteristic by searching through the |
| // pending entries. |
| int inst_id = 0; |
| for (const auto& entry : pending_decl_->attributes) { |
| const GattIdentifier& gatt_id = entry.id; |
| |
| if (!gatt_id.IsCharacteristic()) |
| continue; |
| |
| if (gatt_id.characteristic_uuid() == uuid) |
| ++inst_id; |
| } |
| |
| CHECK(pending_decl_->service_id.IsService()); |
| |
| return GattIdentifier::CreateCharacteristicId( |
| inst_id, uuid, pending_decl_->service_id); |
| } |
| |
| std::unique_ptr<GattIdentifier> GattServer::GetIdForDescriptor( |
| const UUID& uuid) { |
| CHECK(pending_decl_); |
| |
| // Calculate the instance ID for this descriptor by searching through the |
| // pending entries. We iterate in reverse until we find a characteristic |
| // entry. |
| CHECK(!pending_decl_->attributes.empty()); |
| int inst_id = 0; |
| bool char_found = false; |
| GattIdentifier char_id; |
| for (auto iter = pending_decl_->attributes.end() - 1; |
| iter != pending_decl_->attributes.begin(); // Begin is always a service |
| --iter) { |
| const GattIdentifier& gatt_id = iter->id; |
| |
| if (gatt_id.IsCharacteristic()) { |
| // Found the owning characteristic. |
| char_found = true; |
| char_id = gatt_id; |
| break; |
| } |
| |
| if (!gatt_id.IsDescriptor()) { |
| // A descriptor must be preceded by a descriptor or a characteristic. |
| LOG(ERROR) << "Descriptors must come directly after a characteristic or " |
| << "another descriptor."; |
| return nullptr; |
| } |
| |
| if (gatt_id.descriptor_uuid() == uuid) |
| ++inst_id; |
| } |
| |
| if (!char_found) { |
| LOG(ERROR) << "No characteristic found to add the descriptor to."; |
| return nullptr; |
| } |
| |
| return GattIdentifier::CreateDescriptorId(inst_id, uuid, char_id); |
| } |
| |
| bool GattServer::SendResponse( |
| const std::string& device_address, int request_id, |
| GATTError error, int offset, |
| const std::vector<uint8_t>& value) { |
| VLOG(1) << __func__ << " - server_id: " << server_id_ |
| << " device_address: " << device_address |
| << " request_id: " << request_id |
| << " error: " << error |
| << " offset: " << offset; |
| lock_guard<mutex> lock(mutex_); |
| |
| bt_bdaddr_t addr; |
| if (!util::BdAddrFromString(device_address, &addr)) { |
| LOG(ERROR) << "Invalid device address given: " << device_address; |
| return false; |
| } |
| |
| if (value.size() + offset > BTGATT_MAX_ATTR_LEN) { |
| LOG(ERROR) << "Value is too large"; |
| return false; |
| } |
| |
| // Find the correct connection ID for |device_address| and |request_id|. |
| auto iter = conn_addr_map_.find(device_address); |
| if (iter == conn_addr_map_.end()) { |
| LOG(ERROR) << "No known connections for device address: " << device_address; |
| return false; |
| } |
| |
| std::shared_ptr<Connection> connection; |
| for (auto tmp : iter->second) { |
| if (tmp->request_id_to_handle.find(request_id) == |
| tmp->request_id_to_handle.end()) |
| continue; |
| |
| connection = tmp; |
| } |
| |
| if (!connection) { |
| LOG(ERROR) << "Pending request with ID " << request_id |
| << " not found for device with BD_ADDR: " << device_address; |
| return false; |
| } |
| |
| btgatt_response_t response; |
| memset(&response, 0, sizeof(response)); |
| |
| // We keep -1 as the handle for "Execute Write Request". In that case, |
| // there is no need to populate the response data. Just send zeros back. |
| int handle = connection->request_id_to_handle[request_id]; |
| response.handle = handle; |
| response.attr_value.handle = handle; |
| if (handle != -1) { |
| memcpy(response.attr_value.value, value.data(), value.size()); |
| response.attr_value.offset = offset; |
| response.attr_value.len = value.size(); |
| } |
| |
| bt_status_t result = hal::BluetoothGattInterface::Get()-> |
| GetServerHALInterface()->send_response( |
| connection->conn_id, request_id, error, &response); |
| if (result != BT_STATUS_SUCCESS) { |
| LOG(ERROR) << "Failed to initiate call to send GATT response"; |
| return false; |
| } |
| |
| connection->request_id_to_handle.erase(request_id); |
| |
| return true; |
| } |
| |
| bool GattServer::SendNotification( |
| const std::string& device_address, |
| const GattIdentifier& characteristic_id, |
| bool confirm, |
| const std::vector<uint8_t>& value, |
| const GattCallback& callback) { |
| VLOG(1) << " - server_id: " << server_id_ |
| << " device_address: " << device_address |
| << " confirm: " << confirm; |
| lock_guard<mutex> lock(mutex_); |
| |
| bt_bdaddr_t addr; |
| if (!util::BdAddrFromString(device_address, &addr)) { |
| LOG(ERROR) << "Invalid device address given: " << device_address; |
| return false; |
| } |
| |
| // Get the connection IDs for which we will send this notification. |
| auto conn_iter = conn_addr_map_.find(device_address); |
| if (conn_iter == conn_addr_map_.end()) { |
| LOG(ERROR) << "No known connections for device with address: " |
| << device_address; |
| return false; |
| } |
| |
| // Make sure that |characteristic_id| matches a valid attribute handle. |
| auto handle_iter = id_to_handle_map_.find(characteristic_id); |
| if (handle_iter == id_to_handle_map_.end()) { |
| LOG(ERROR) << "Unknown characteristic"; |
| return false; |
| } |
| |
| std::shared_ptr<PendingIndication> pending_ind( |
| new PendingIndication(callback)); |
| |
| // Send the notification/indication on all matching connections. |
| int send_count = 0; |
| for (auto conn : conn_iter->second) { |
| // Make sure that one isn't already pending for this connection. |
| if (pending_indications_.find(conn->conn_id) != |
| pending_indications_.end()) { |
| VLOG(1) << "A" << (confirm ? "n indication" : " notification") |
| << " is already pending for connection: " << conn->conn_id; |
| continue; |
| } |
| |
| // The HAL API takes char* rather const char* for |value|, so we have to |
| // cast away the const. |
| // TODO(armansito): Make HAL accept const char*. |
| bt_status_t status = hal::BluetoothGattInterface::Get()-> |
| GetServerHALInterface()->send_indication( |
| server_id_, |
| handle_iter->second, |
| conn->conn_id, |
| value.size(), |
| confirm, |
| reinterpret_cast<char*>(const_cast<uint8_t*>(value.data()))); |
| |
| // Increment the send count if this was successful. We don't immediately |
| // fail if the HAL returned an error. It's better to report success as long |
| // as we sent out at least one notification to this device as |
| // multi-transport GATT connections from the same BD_ADDR will be rare |
| // enough already. |
| if (status != BT_STATUS_SUCCESS) |
| continue; |
| |
| send_count++; |
| pending_indications_[conn->conn_id] = pending_ind; |
| } |
| |
| if (send_count == 0) { |
| LOG(ERROR) << "Failed to send notifications/indications to device: " |
| << device_address; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void GattServer::ConnectionCallback( |
| hal::BluetoothGattInterface* /* gatt_iface */, |
| int conn_id, int server_id, |
| int connected, |
| const bt_bdaddr_t& bda) { |
| lock_guard<mutex> lock(mutex_); |
| |
| if (server_id != server_id_) |
| return; |
| |
| std::string device_address = BtAddrString(&bda); |
| |
| VLOG(1) << __func__ << " conn_id: " << conn_id << " connected: " << connected |
| << " BD_ADDR: " << device_address; |
| |
| if (!connected) { |
| // Erase the entry if we were connected to it. |
| VLOG(1) << "No longer connected: " << device_address; |
| conn_id_map_.erase(conn_id); |
| auto iter = conn_addr_map_.find(device_address); |
| if (iter == conn_addr_map_.end()) |
| return; |
| |
| // Remove the appropriate connection objects in the address. |
| for (auto conn_iter = iter->second.begin(); conn_iter != iter->second.end(); |
| ++conn_iter) { |
| if ((*conn_iter)->conn_id != conn_id) |
| continue; |
| |
| iter->second.erase(conn_iter); |
| break; |
| } |
| |
| return; |
| } |
| |
| if (conn_id_map_.find(conn_id) != conn_id_map_.end()) { |
| LOG(WARNING) << "Connection entry already exists; " |
| << "ignoring ConnectionCallback"; |
| return; |
| } |
| |
| LOG(INFO) << "Added connection entry for conn_id: " << conn_id |
| << " device address: " << device_address; |
| std::shared_ptr<Connection> connection(new Connection(conn_id, bda)); |
| conn_id_map_[conn_id] = connection; |
| conn_addr_map_[device_address].push_back(connection); |
| } |
| |
| void GattServer::ServiceAddedCallback( |
| hal::BluetoothGattInterface* gatt_iface, |
| int status, int server_id, |
| const btgatt_srvc_id_t& srvc_id, |
| int service_handle) { |
| lock_guard<mutex> lock(mutex_); |
| |
| if (server_id != server_id_) |
| return; |
| |
| // Construct a GATT identifier. |
| auto gatt_id = hal::GetServiceIdFromHAL(srvc_id); |
| CHECK(pending_id_); |
| CHECK(*gatt_id == *pending_id_); |
| CHECK(*gatt_id == pending_decl_->service_id); |
| CHECK(pending_id_->IsService()); |
| |
| VLOG(1) << __func__ << " - status: " << status |
| << " server_id: " << server_id |
| << " handle: " << service_handle |
| << " UUID: " << gatt_id->service_uuid().ToString(); |
| |
| if (status != BT_STATUS_SUCCESS) { |
| NotifyEndCallbackAndClearData(static_cast<BLEStatus>(status), *gatt_id); |
| return; |
| } |
| |
| // Add this to the handle map. |
| pending_handle_map_[*gatt_id] = service_handle; |
| CHECK(-1 == pending_decl_->service_handle); |
| pending_decl_->service_handle = service_handle; |
| |
| HandleNextEntry(gatt_iface); |
| } |
| |
| void GattServer::CharacteristicAddedCallback( |
| hal::BluetoothGattInterface* gatt_iface, |
| int status, int server_id, |
| const bt_uuid_t& uuid, |
| int service_handle, |
| int char_handle) { |
| lock_guard<mutex> lock(mutex_); |
| |
| if (server_id != server_id_) |
| return; |
| |
| CHECK(pending_decl_); |
| CHECK(pending_decl_->service_handle == service_handle); |
| CHECK(pending_id_); |
| CHECK(pending_id_->IsCharacteristic()); |
| CHECK(pending_id_->characteristic_uuid() == UUID(uuid)); |
| |
| VLOG(1) << __func__ << " - status: " << status |
| << " server_id: " << server_id |
| << " service_handle: " << service_handle |
| << " char_handle: " << char_handle; |
| |
| if (status != BT_STATUS_SUCCESS) { |
| NotifyEndCallbackAndClearData(static_cast<BLEStatus>(status), |
| pending_decl_->service_id); |
| return; |
| } |
| |
| // Add this to the handle map and continue. |
| pending_handle_map_[*pending_id_] = char_handle; |
| HandleNextEntry(gatt_iface); |
| } |
| |
| void GattServer::DescriptorAddedCallback( |
| hal::BluetoothGattInterface* gatt_iface, |
| int status, int server_id, |
| const bt_uuid_t& uuid, |
| int service_handle, |
| int desc_handle) { |
| lock_guard<mutex> lock(mutex_); |
| |
| if (server_id != server_id_) |
| return; |
| |
| CHECK(pending_decl_); |
| CHECK(pending_decl_->service_handle == service_handle); |
| CHECK(pending_id_); |
| CHECK(pending_id_->IsDescriptor()); |
| CHECK(pending_id_->descriptor_uuid() == UUID(uuid)); |
| |
| VLOG(1) << __func__ << " - status: " << status |
| << " server_id: " << server_id |
| << " service_handle: " << service_handle |
| << " desc_handle: " << desc_handle; |
| |
| if (status != BT_STATUS_SUCCESS) { |
| NotifyEndCallbackAndClearData(static_cast<BLEStatus>(status), |
| pending_decl_->service_id); |
| return; |
| } |
| |
| // Add this to the handle map and contiue. |
| pending_handle_map_[*pending_id_] = desc_handle; |
| HandleNextEntry(gatt_iface); |
| } |
| |
| void GattServer::ServiceStartedCallback( |
| hal::BluetoothGattInterface* gatt_iface, |
| int status, int server_id, |
| int service_handle) { |
| lock_guard<mutex> lock(mutex_); |
| |
| if (server_id != server_id_) |
| return; |
| |
| CHECK(pending_id_); |
| CHECK(pending_decl_); |
| CHECK(pending_decl_->service_handle == service_handle); |
| |
| VLOG(1) << __func__ << " - server_id: " << server_id |
| << " handle: " << service_handle; |
| |
| // If we failed to start the service, remove it from the database and ignore |
| // the result. |
| if (status != BT_STATUS_SUCCESS) { |
| gatt_iface->GetServerHALInterface()->delete_service( |
| server_id_, service_handle); |
| } |
| |
| // Complete the operation. |
| NotifyEndCallbackAndClearData(static_cast<BLEStatus>(status), |
| pending_decl_->service_id); |
| } |
| |
| void GattServer::ServiceStoppedCallback( |
| hal::BluetoothGattInterface* /* gatt_iface */, |
| int /* status */, |
| int /* server_id */, |
| int /* service_handle */) { |
| // TODO(armansito): Support stopping a service. |
| } |
| |
| void GattServer::RequestReadCallback( |
| hal::BluetoothGattInterface* /* gatt_iface */, |
| int conn_id, int trans_id, |
| const bt_bdaddr_t& bda, |
| int attribute_handle, int offset, |
| bool is_long) { |
| lock_guard<mutex> lock(mutex_); |
| |
| // Check to see if we know about this connection. Otherwise ignore the |
| // request. |
| auto conn = GetConnection(conn_id, bda, trans_id); |
| if (!conn) |
| return; |
| |
| std::string device_address = BtAddrString(&bda); |
| |
| VLOG(1) << __func__ << " - conn_id: " << conn_id << " trans_id: " << trans_id |
| << " BD_ADDR: " << device_address |
| << " attribute_handle: " << attribute_handle << " offset: " << offset |
| << " is_long: " << is_long; |
| |
| // Make sure that the handle is valid. |
| auto iter = handle_to_id_map_.find(attribute_handle); |
| if (iter == handle_to_id_map_.end()) { |
| LOG(ERROR) << "Request received for unknown handle: " << attribute_handle; |
| return; |
| } |
| |
| conn->request_id_to_handle[trans_id] = attribute_handle; |
| |
| // If there is no delegate then there is nobody to handle request. The request |
| // will eventually timeout and we should get a connection update that |
| // terminates the connection. |
| if (!delegate_) { |
| // TODO(armansito): Require a delegate at server registration so that this |
| // is never possible. |
| LOG(WARNING) << "No delegate was assigned to GattServer. Incoming request " |
| << "will time out."; |
| return; |
| } |
| |
| if (iter->second.IsCharacteristic()) { |
| delegate_->OnCharacteristicReadRequest( |
| this, device_address, trans_id, offset, is_long, iter->second); |
| } else if (iter->second.IsDescriptor()) { |
| delegate_->OnDescriptorReadRequest( |
| this, device_address, trans_id, offset, is_long, iter->second); |
| } else { |
| // Our API only delegates to applications those read requests for |
| // characteristic value and descriptor attributes. Everything else should be |
| // handled by the stack. |
| LOG(WARNING) << "Read request received for unsupported attribute"; |
| } |
| } |
| |
| void GattServer::RequestWriteCallback( |
| hal::BluetoothGattInterface* /* gatt_iface */, |
| int conn_id, int trans_id, |
| const bt_bdaddr_t& bda, |
| int attr_handle, int offset, int length, |
| bool need_rsp, bool is_prep, uint8_t* value) { |
| lock_guard<mutex> lock(mutex_); |
| |
| if (length < 0) { |
| LOG(WARNING) << "Negative length value received"; |
| return; |
| } |
| |
| // Check to see if we know about this connection. Otherwise ignore the |
| // request. |
| auto conn = GetConnection(conn_id, bda, trans_id); |
| if (!conn) |
| return; |
| |
| std::string device_address = BtAddrString(&bda); |
| |
| VLOG(1) << __func__ << " - conn_id: " << conn_id << " trans_id: " << trans_id |
| << " BD_ADDR: " << device_address |
| << " attr_handle: " << attr_handle << " offset: " << offset |
| << " length: " << length << " need_rsp: " << need_rsp |
| << " is_prep: " << is_prep; |
| |
| // Make sure that the handle is valid. |
| auto iter = handle_to_id_map_.find(attr_handle); |
| if (iter == handle_to_id_map_.end()) { |
| LOG(ERROR) << "Request received for unknown handle: " << attr_handle; |
| return; |
| } |
| |
| // Store the request ID only if this is not a write-without-response. If |
| // another request occurs after this with the same request ID, then we'll |
| // simply process it normally, though that shouldn't ever happen. |
| if (need_rsp) |
| conn->request_id_to_handle[trans_id] = attr_handle; |
| |
| // If there is no delegate then there is nobody to handle request. The request |
| // will eventually timeout and we should get a connection update that |
| // terminates the connection. |
| if (!delegate_) { |
| // TODO(armansito): Require a delegate at server registration so that this |
| // is never possible. |
| LOG(WARNING) << "No delegate was assigned to GattServer. Incoming request " |
| << "will time out."; |
| return; |
| } |
| |
| std::vector<uint8_t> value_vec(value, value + length); |
| |
| if (iter->second.IsCharacteristic()) { |
| delegate_->OnCharacteristicWriteRequest( |
| this, device_address, trans_id, offset, is_prep, need_rsp, |
| value_vec, iter->second); |
| } else if (iter->second.IsDescriptor()) { |
| delegate_->OnDescriptorWriteRequest( |
| this, device_address, trans_id, offset, is_prep, need_rsp, |
| value_vec, iter->second); |
| } else { |
| // Our API only delegates to applications those read requests for |
| // characteristic value and descriptor attributes. Everything else should be |
| // handled by the stack. |
| LOG(WARNING) << "Write request received for unsupported attribute"; |
| } |
| } |
| |
| void GattServer::RequestExecWriteCallback( |
| hal::BluetoothGattInterface* /* gatt_iface */, |
| int conn_id, int trans_id, |
| const bt_bdaddr_t& bda, int exec_write) { |
| lock_guard<mutex> lock(mutex_); |
| |
| // Check to see if we know about this connection. Otherwise ignore the |
| // request. |
| auto conn = GetConnection(conn_id, bda, trans_id); |
| if (!conn) |
| return; |
| |
| std::string device_address = BtAddrString(&bda); |
| |
| VLOG(1) << __func__ << " - conn_id: " << conn_id << " trans_id: " << trans_id |
| << " BD_ADDR: " << device_address << " exec_write: " << exec_write; |
| |
| // Just store a dummy invalid handle as this request doesn't apply to a |
| // specific handle. |
| conn->request_id_to_handle[trans_id] = -1; |
| |
| // If there is no delegate then there is nobody to handle request. The request |
| // will eventually timeout and we should get a connection update that |
| // terminates the connection. |
| if (!delegate_) { |
| // TODO(armansito): Require a delegate at server registration so that this |
| // is never possible. |
| LOG(WARNING) << "No delegate was assigned to GattServer. Incoming request " |
| << "will time out."; |
| return; |
| } |
| |
| delegate_->OnExecuteWriteRequest(this, device_address, trans_id, exec_write); |
| } |
| |
| void GattServer::IndicationSentCallback( |
| hal::BluetoothGattInterface* /* gatt_iface */, |
| int conn_id, int status) { |
| VLOG(1) << __func__ << " conn_id: " << conn_id << " status: " << status; |
| lock_guard<mutex> lock(mutex_); |
| |
| const auto& pending_ind_iter = pending_indications_.find(conn_id); |
| if (pending_ind_iter == pending_indications_.end()) { |
| VLOG(1) << "Unknown connection: " << conn_id; |
| return; |
| } |
| |
| std::shared_ptr<PendingIndication> pending_ind = pending_ind_iter->second; |
| pending_indications_.erase(pending_ind_iter); |
| |
| if (status == BT_STATUS_SUCCESS) |
| pending_ind->has_success = true; |
| |
| // Invoke it if this was the last reference to the confirmation callback. |
| if (pending_ind.unique() && pending_ind->callback) { |
| pending_ind->callback( |
| pending_ind->has_success ? |
| GATT_ERROR_NONE : static_cast<GATTError>(status)); |
| } |
| } |
| |
| void GattServer::NotifyEndCallbackAndClearData( |
| BLEStatus status, const GattIdentifier& id) { |
| VLOG(1) << __func__ << " status: " << status; |
| CHECK(pending_end_decl_cb_); |
| |
| if (status == BLE_STATUS_SUCCESS) { |
| id_to_handle_map_.insert(pending_handle_map_.begin(), |
| pending_handle_map_.end()); |
| for (auto& iter : pending_handle_map_) |
| handle_to_id_map_[iter.second] = iter.first; |
| } |
| |
| pending_end_decl_cb_(status, id); |
| |
| CleanUpPendingData(); |
| } |
| |
| void GattServer::CleanUpPendingData() { |
| pending_id_ = nullptr; |
| pending_decl_ = nullptr; |
| pending_end_decl_cb_ = ResultCallback(); |
| pending_handle_map_.clear(); |
| } |
| |
| void GattServer::HandleNextEntry(hal::BluetoothGattInterface* gatt_iface) { |
| CHECK(pending_decl_); |
| CHECK(gatt_iface); |
| |
| auto next_entry = PopNextEntry(); |
| if (!next_entry) { |
| // No more entries. Call start_service to finish up. |
| bt_status_t status = gatt_iface->GetServerHALInterface()->start_service( |
| server_id_, |
| pending_decl_->service_handle, |
| TRANSPORT_BREDR | TRANSPORT_LE); |
| |
| // Terminate the procedure in the case of an error. |
| if (status != BT_STATUS_SUCCESS) { |
| NotifyEndCallbackAndClearData(static_cast<BLEStatus>(status), |
| pending_decl_->service_id); |
| } |
| |
| return; |
| } |
| |
| if (next_entry->id.IsCharacteristic()) { |
| bt_uuid_t char_uuid = next_entry->id.characteristic_uuid().GetBlueDroid(); |
| bt_status_t status = gatt_iface->GetServerHALInterface()-> |
| add_characteristic( |
| server_id_, |
| pending_decl_->service_handle, |
| &char_uuid, |
| next_entry->char_properties, |
| next_entry->permissions); |
| |
| // Terminate the procedure in the case of an error. |
| if (status != BT_STATUS_SUCCESS) { |
| NotifyEndCallbackAndClearData(static_cast<BLEStatus>(status), |
| pending_decl_->service_id); |
| return; |
| } |
| |
| pending_id_.reset(new GattIdentifier(next_entry->id)); |
| return; |
| } |
| |
| if (next_entry->id.IsDescriptor()) { |
| bt_uuid_t desc_uuid = next_entry->id.descriptor_uuid().GetBlueDroid(); |
| bt_status_t status = gatt_iface->GetServerHALInterface()-> |
| add_descriptor( |
| server_id_, |
| pending_decl_->service_handle, |
| &desc_uuid, |
| next_entry->permissions); |
| |
| // Terminate the procedure in the case of an error. |
| if (status != BT_STATUS_SUCCESS) { |
| NotifyEndCallbackAndClearData(static_cast<BLEStatus>(status), |
| pending_decl_->service_id); |
| return; |
| } |
| |
| pending_id_.reset(new GattIdentifier(next_entry->id)); |
| return; |
| } |
| |
| NOTREACHED() << "Unexpected entry type"; |
| } |
| |
| std::shared_ptr<GattServer::Connection> GattServer::GetConnection( |
| int conn_id, const bt_bdaddr_t& bda, int request_id) { |
| auto iter = conn_id_map_.find(conn_id); |
| if (iter == conn_id_map_.end()) { |
| VLOG(1) << "Connection doesn't belong to this server"; |
| return nullptr; |
| } |
| |
| auto conn = iter->second; |
| if (conn->bdaddr != bda) { |
| LOG(WARNING) << "BD_ADDR: " << BtAddrString(&bda) << " doesn't match " |
| << "connection ID: " << conn_id; |
| return nullptr; |
| } |
| |
| if (conn->request_id_to_handle.find(request_id) != |
| conn->request_id_to_handle.end()) { |
| VLOG(1) << "Request with ID: " << request_id << " already exists for " |
| << " connection: " << conn_id; |
| return nullptr; |
| } |
| |
| return conn; |
| } |
| |
| std::unique_ptr<GattServer::AttributeEntry> GattServer::PopNextEntry() { |
| CHECK(pending_decl_); |
| |
| if (pending_decl_->attributes.empty()) |
| return nullptr; |
| |
| const auto& next = pending_decl_->attributes.front(); |
| std::unique_ptr<AttributeEntry> entry(new AttributeEntry(next)); |
| |
| pending_decl_->attributes.pop_front(); |
| |
| return entry; |
| } |
| |
| std::unique_ptr<GattIdentifier> GattServer::PopNextId() { |
| auto entry = PopNextEntry(); |
| if (!entry) |
| return nullptr; |
| |
| return std::unique_ptr<GattIdentifier>(new GattIdentifier(entry->id)); |
| } |
| |
| // GattServerFactory implementation |
| // ======================================================== |
| |
| GattServerFactory::GattServerFactory() { |
| hal::BluetoothGattInterface::Get()->AddServerObserver(this); |
| } |
| |
| GattServerFactory::~GattServerFactory() { |
| hal::BluetoothGattInterface::Get()->RemoveServerObserver(this); |
| } |
| |
| bool GattServerFactory::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) << "GATT-server client with given UUID already being registered " |
| << " - UUID: " << uuid.ToString(); |
| return false; |
| } |
| |
| const btgatt_server_interface_t* hal_iface = |
| hal::BluetoothGattInterface::Get()->GetServerHALInterface(); |
| bt_uuid_t app_uuid = uuid.GetBlueDroid(); |
| |
| if (hal_iface->register_server(&app_uuid) != BT_STATUS_SUCCESS) |
| return false; |
| |
| pending_calls_[uuid] = callback; |
| |
| return true; |
| } |
| |
| void GattServerFactory::RegisterServerCallback( |
| hal::BluetoothGattInterface* gatt_iface, |
| int status, int server_id, |
| const bt_uuid_t& 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 server if the call wasn't successful. |
| std::unique_ptr<GattServer> server; |
| BLEStatus result = BLE_STATUS_FAILURE; |
| if (status == BT_STATUS_SUCCESS) { |
| server.reset(new GattServer(uuid, server_id)); |
| |
| gatt_iface->AddServerObserver(server.get()); |
| |
| result = BLE_STATUS_SUCCESS; |
| } |
| |
| // Notify the result via the result callback. |
| iter->second(result, uuid, std::move(server)); |
| |
| pending_calls_.erase(iter); |
| } |
| |
| } // namespace bluetooth |