| // Copyright 2018 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 "chrome/browser/chromeos/secure_channel/nearby_connector_impl.h" |
| |
| #include "base/bind.h" |
| #include "chrome/browser/chromeos/secure_channel/nearby_connection_broker_impl.h" |
| #include "chrome/browser/chromeos/secure_channel/nearby_endpoint_finder_impl.h" |
| #include "chromeos/components/multidevice/logging/logging.h" |
| #include "chromeos/services/nearby/public/cpp/nearby_process_manager.h" |
| #include "chromeos/services/secure_channel/public/cpp/client/nearby_connector.h" |
| #include "components/keyed_service/core/keyed_service.h" |
| |
| namespace chromeos { |
| namespace secure_channel { |
| |
| NearbyConnectorImpl::ConnectionRequestMetadata::ConnectionRequestMetadata( |
| const std::vector<uint8_t>& bluetooth_public_address, |
| mojo::PendingRemote<mojom::NearbyMessageReceiver> message_receiver, |
| ConnectCallback callback) |
| : bluetooth_public_address(bluetooth_public_address), |
| message_receiver(std::move(message_receiver)), |
| callback(std::move(callback)) {} |
| |
| NearbyConnectorImpl::ConnectionRequestMetadata::~ConnectionRequestMetadata() = |
| default; |
| |
| NearbyConnectorImpl::ActiveConnectionAttempt::ActiveConnectionAttempt( |
| const base::UnguessableToken& attempt_id, |
| std::unique_ptr<NearbyEndpointFinder> endpoint_finder, |
| ConnectCallback callback) |
| : attempt_id(attempt_id), |
| endpoint_finder(std::move(endpoint_finder)), |
| callback(std::move(callback)) {} |
| |
| NearbyConnectorImpl::ActiveConnectionAttempt::~ActiveConnectionAttempt() = |
| default; |
| |
| NearbyConnectorImpl::NearbyConnectorImpl( |
| nearby::NearbyProcessManager* nearby_process_manager) |
| : nearby_process_manager_(nearby_process_manager) {} |
| |
| NearbyConnectorImpl::~NearbyConnectorImpl() = default; |
| |
| void NearbyConnectorImpl::Connect( |
| const std::vector<uint8_t>& bluetooth_public_address, |
| mojo::PendingRemote<mojom::NearbyMessageReceiver> message_receiver, |
| ConnectCallback callback) { |
| queued_connection_requests_.emplace( |
| std::make_unique<ConnectionRequestMetadata>(bluetooth_public_address, |
| std::move(message_receiver), |
| std::move(callback))); |
| ProcessQueuedConnectionRequests(); |
| } |
| |
| void NearbyConnectorImpl::Shutdown() { |
| nearby_process_manager_ = nullptr; |
| ClearActiveAndPendingConnections(); |
| } |
| |
| void NearbyConnectorImpl::ClearActiveAndPendingConnections() { |
| if (active_connection_attempt_) { |
| InvokeActiveConnectionAttemptCallback(mojo::NullRemote()); |
| active_connection_attempt_.reset(); |
| } |
| id_to_brokers_map_.clear(); |
| process_reference_.reset(); |
| } |
| |
| void NearbyConnectorImpl::ProcessQueuedConnectionRequests() { |
| // Shutdown() has been called, so no further connection requests should be |
| // attempted. |
| if (!nearby_process_manager_) |
| return; |
| |
| // No queued requests; nothing to do. |
| if (queued_connection_requests_.empty()) |
| return; |
| |
| // Only one connection can be requested at a time. |
| if (active_connection_attempt_) |
| return; |
| |
| // If there is no currently-held process reference, request one. This ensures |
| // that the Nearby utility process is running. |
| if (!process_reference_) { |
| PA_LOG(VERBOSE) << "Obtaining Nearby process reference"; |
| process_reference_ = nearby_process_manager_->GetNearbyProcessReference( |
| base::BindOnce(&NearbyConnectorImpl::OnNearbyProcessStopped, |
| weak_ptr_factory_.GetWeakPtr())); |
| |
| if (!process_reference_) { |
| PA_LOG(WARNING) << "Could not obtain Nearby process reference"; |
| return; |
| } |
| } |
| |
| // Remove the request from the front of the queue. |
| std::unique_ptr<ConnectionRequestMetadata> metadata = |
| std::move(queued_connection_requests_.front()); |
| queued_connection_requests_.pop(); |
| |
| auto new_broker_id = base::UnguessableToken::Create(); |
| mojo::PendingRemote<mojom::NearbyMessageSender> message_sender_pending_remote; |
| mojo::PendingReceiver<mojom::NearbyMessageSender> |
| message_sender_pending_receiver = |
| message_sender_pending_remote.InitWithNewPipeAndPassReceiver(); |
| |
| DCHECK(!active_connection_attempt_); |
| active_connection_attempt_.emplace( |
| new_broker_id, |
| NearbyEndpointFinderImpl::Factory::Create( |
| process_reference_->GetNearbyConnections()), |
| std::move(metadata->callback)); |
| |
| id_to_brokers_map_[new_broker_id] = |
| NearbyConnectionBrokerImpl::Factory::Create( |
| metadata->bluetooth_public_address, |
| active_connection_attempt_->endpoint_finder.get(), |
| std::move(message_sender_pending_receiver), |
| std::move(metadata->message_receiver), |
| process_reference_->GetNearbyConnections(), |
| base::BindOnce(&NearbyConnectorImpl::OnConnected, |
| base::Unretained(this), new_broker_id, |
| std::move(message_sender_pending_remote)), |
| base::BindOnce(&NearbyConnectorImpl::OnDisconnected, |
| base::Unretained(this), new_broker_id)); |
| } |
| |
| void NearbyConnectorImpl::OnNearbyProcessStopped() { |
| PA_LOG(WARNING) << "Nearby process stopped unexpectedly. Destroying active " |
| << "connections."; |
| |
| ClearActiveAndPendingConnections(); |
| ProcessQueuedConnectionRequests(); |
| } |
| |
| void NearbyConnectorImpl::OnConnected( |
| const base::UnguessableToken& id, |
| mojo::PendingRemote<mojom::NearbyMessageSender> |
| message_sender_pending_remote) { |
| DCHECK_EQ(active_connection_attempt_->attempt_id, id); |
| InvokeActiveConnectionAttemptCallback( |
| std::move(message_sender_pending_remote)); |
| active_connection_attempt_.reset(); |
| ProcessQueuedConnectionRequests(); |
| } |
| |
| void NearbyConnectorImpl::OnDisconnected(const base::UnguessableToken& id) { |
| // If the pending connection could not complete, invoke the callback with an |
| // unbound PendingRemote. |
| if (active_connection_attempt_ && |
| active_connection_attempt_->attempt_id == id) { |
| InvokeActiveConnectionAttemptCallback(mojo::NullRemote()); |
| active_connection_attempt_.reset(); |
| } |
| |
| id_to_brokers_map_.erase(id); |
| |
| // If this disconnection corresponds to the last active broker, release the |
| // process reference so that the Nearby utility process can shut down if |
| // applicable. |
| if (id_to_brokers_map_.empty()) { |
| PA_LOG(VERBOSE) << "Releasing Nearby process reference"; |
| process_reference_.reset(); |
| } |
| |
| ProcessQueuedConnectionRequests(); |
| } |
| |
| void NearbyConnectorImpl::InvokeActiveConnectionAttemptCallback( |
| mojo::PendingRemote<mojom::NearbyMessageSender> |
| message_sender_pending_remote) { |
| std::move(active_connection_attempt_->callback) |
| .Run(std::move(message_sender_pending_remote)); |
| } |
| |
| } // namespace secure_channel |
| } // namespace chromeos |