| /* |
| * Copyright 2019 The Android Open Source Project |
| * |
| * 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 "l2cap/internal/receiver.h" |
| |
| #include "common/bidi_queue.h" |
| #include "l2cap/cid.h" |
| #include "l2cap/internal/data_pipeline_manager.h" |
| #include "l2cap/l2cap_packets.h" |
| #include "packet/packet_view.h" |
| |
| namespace bluetooth { |
| namespace l2cap { |
| namespace internal { |
| Receiver::Receiver( |
| LowerQueueUpEnd* link_queue_up_end, os::Handler* handler, DataPipelineManager* data_pipeline_manager_) |
| : link_queue_up_end_(link_queue_up_end), |
| handler_(handler), |
| buffer_timer_(handler), |
| data_pipeline_manager_(data_pipeline_manager_) { |
| ASSERT(link_queue_up_end_ != nullptr && handler_ != nullptr); |
| link_queue_up_end_->RegisterDequeue(handler_, |
| common::Bind(&Receiver::link_queue_dequeue_callback, common::Unretained(this))); |
| } |
| |
| // Invoked from external handler/thread (ModuleRegistry) |
| Receiver::~Receiver() { |
| link_queue_up_end_->UnregisterDequeue(); |
| } |
| |
| // Invoked from external (Queue Reactable) |
| void Receiver::link_queue_dequeue_callback() { |
| auto packet = link_queue_up_end_->TryDequeue(); |
| auto basic_frame_view = BasicFrameView::Create(*packet); |
| if (!basic_frame_view.IsValid()) { |
| LOG_WARN("Received an invalid basic frame"); |
| return; |
| } |
| Cid cid = static_cast<Cid>(basic_frame_view.GetChannelId()); |
| auto* data_controller = data_pipeline_manager_->GetDataController(cid); |
| if (data_controller == nullptr) { |
| // TODO(b/150170271): Buffer a few packets before data controller is attached |
| LOG_WARN("Received a packet without data controller. cid: %d", cid); |
| buffered_packets_.emplace(*packet); |
| LOG_WARN("Enqueued the unexpected packet. Current queue size: %zu", buffered_packets_.size()); |
| buffer_timer_.Schedule( |
| common::BindOnce(&Receiver::check_buffered_packets, common::Unretained(this)), std::chrono::milliseconds(500)); |
| |
| return; |
| } |
| data_controller->OnPdu(*packet); |
| } |
| |
| void Receiver::check_buffered_packets() { |
| while (!buffered_packets_.empty()) { |
| auto packet = buffered_packets_.front(); |
| buffered_packets_.pop(); |
| auto basic_frame_view = BasicFrameView::Create(packet); |
| if (!basic_frame_view.IsValid()) { |
| LOG_WARN("Received an invalid basic frame"); |
| return; |
| } |
| Cid cid = static_cast<Cid>(basic_frame_view.GetChannelId()); |
| auto* data_controller = data_pipeline_manager_->GetDataController(cid); |
| if (data_controller == nullptr) { |
| LOG_ERROR("Dropping a packet with invalid cid: %d", cid); |
| } else { |
| data_controller->OnPdu(packet); |
| } |
| } |
| } |
| |
| } // namespace internal |
| } // namespace l2cap |
| } // namespace bluetooth |