| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chromeos/components/tether/tether_network_disconnection_handler.h" |
| |
| #include "base/bind.h" |
| #include "base/bind_helpers.h" |
| #include "base/macros.h" |
| #include "base/memory/ptr_util.h" |
| #include "base/metrics/histogram_macros.h" |
| #include "base/threading/thread_task_runner_handle.h" |
| #include "chromeos/components/multidevice/logging/logging.h" |
| #include "chromeos/components/tether/disconnect_tethering_request_sender.h" |
| #include "chromeos/components/tether/network_configuration_remover.h" |
| #include "chromeos/components/tether/tether_disconnector.h" |
| #include "chromeos/components/tether/tether_host_fetcher.h" |
| #include "chromeos/components/tether/tether_session_completion_logger.h" |
| #include "chromeos/network/network_handler.h" |
| #include "chromeos/network/network_state.h" |
| #include "chromeos/network/network_state_handler.h" |
| |
| namespace chromeos { |
| |
| namespace tether { |
| |
| TetherNetworkDisconnectionHandler::TetherNetworkDisconnectionHandler( |
| ActiveHost* active_host, |
| NetworkStateHandler* network_state_handler, |
| NetworkConfigurationRemover* network_configuration_remover, |
| DisconnectTetheringRequestSender* disconnect_tethering_request_sender, |
| TetherSessionCompletionLogger* tether_session_completion_logger) |
| : active_host_(active_host), |
| network_state_handler_(network_state_handler), |
| network_configuration_remover_(network_configuration_remover), |
| disconnect_tethering_request_sender_(disconnect_tethering_request_sender), |
| tether_session_completion_logger_(tether_session_completion_logger), |
| task_runner_(base::ThreadTaskRunnerHandle::Get()), |
| weak_ptr_factory_(this) { |
| network_state_handler_->AddObserver(this, FROM_HERE); |
| } |
| |
| TetherNetworkDisconnectionHandler::~TetherNetworkDisconnectionHandler() { |
| network_state_handler_->RemoveObserver(this, FROM_HERE); |
| } |
| |
| void TetherNetworkDisconnectionHandler::NetworkConnectionStateChanged( |
| const NetworkState* network) { |
| // Only handle network connection state changes which indicate that the |
| // underlying Wi-Fi network for a Tether connection has been disconnected. |
| if (network->guid() != active_host_->GetWifiNetworkGuid() || |
| network->IsConnectingOrConnected()) { |
| return; |
| } |
| |
| // Handle disconnection as part of a new task. Posting a task here ensures |
| // that processing the disconnection is done after other |
| // NetworkStateHandlerObservers are finished running. Processing the |
| // disconnection immediately can cause crashes; see https://crbug.com/800370. |
| task_runner_->PostTask( |
| FROM_HERE, base::BindOnce(&TetherNetworkDisconnectionHandler:: |
| HandleActiveWifiNetworkDisconnection, |
| weak_ptr_factory_.GetWeakPtr(), network->guid(), |
| network->path())); |
| } |
| |
| void TetherNetworkDisconnectionHandler::HandleActiveWifiNetworkDisconnection( |
| const std::string& network_guid, |
| const std::string& network_path) { |
| PA_LOG(WARNING) << "Connection to active host (Wi-Fi network GUID " |
| << network_guid << ") has been lost."; |
| |
| // Check if Wi-Fi is enabled; if it is, this indicates that the connection |
| // to the Tether host dropped. If it isn't, then the event of Wi-Fi being |
| // disabled caused the connection to end. |
| tether_session_completion_logger_->RecordTetherSessionCompletion( |
| network_state_handler_->IsTechnologyEnabled(NetworkTypePattern::WiFi()) |
| ? TetherSessionCompletionLogger::SessionCompletionReason:: |
| CONNECTION_DROPPED |
| : TetherSessionCompletionLogger::SessionCompletionReason:: |
| WIFI_DISABLED); |
| |
| network_configuration_remover_->RemoveNetworkConfigurationByPath( |
| network_path); |
| |
| // Send a DisconnectTetheringRequest to the tether host so that it can shut |
| // down its Wi-Fi hotspot if it is no longer in use. |
| disconnect_tethering_request_sender_->SendDisconnectRequestToDevice( |
| active_host_->GetActiveHostDeviceId()); |
| |
| active_host_->SetActiveHostDisconnected(); |
| } |
| |
| void TetherNetworkDisconnectionHandler::SetTaskRunnerForTesting( |
| scoped_refptr<base::TaskRunner> test_task_runner) { |
| task_runner_ = test_task_runner; |
| } |
| |
| } // namespace tether |
| |
| } // namespace chromeos |