89 lines
3.1 KiB
C++
89 lines
3.1 KiB
C++
/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "l2cap/internal/receiver.h"
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#include "common/bidi_queue.h"
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#include "l2cap/cid.h"
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#include "l2cap/internal/data_pipeline_manager.h"
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#include "l2cap/l2cap_packets.h"
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#include "packet/packet_view.h"
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namespace bluetooth {
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namespace l2cap {
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namespace internal {
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Receiver::Receiver(
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LowerQueueUpEnd* link_queue_up_end, os::Handler* handler, DataPipelineManager* data_pipeline_manager_)
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: link_queue_up_end_(link_queue_up_end),
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handler_(handler),
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buffer_timer_(handler),
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data_pipeline_manager_(data_pipeline_manager_) {
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ASSERT(link_queue_up_end_ != nullptr && handler_ != nullptr);
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link_queue_up_end_->RegisterDequeue(handler_,
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common::Bind(&Receiver::link_queue_dequeue_callback, common::Unretained(this)));
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}
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// Invoked from external handler/thread (ModuleRegistry)
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Receiver::~Receiver() {
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link_queue_up_end_->UnregisterDequeue();
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}
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// Invoked from external (Queue Reactable)
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void Receiver::link_queue_dequeue_callback() {
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auto packet = link_queue_up_end_->TryDequeue();
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auto basic_frame_view = BasicFrameView::Create(*packet);
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if (!basic_frame_view.IsValid()) {
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LOG_WARN("Received an invalid basic frame");
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return;
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}
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Cid cid = static_cast<Cid>(basic_frame_view.GetChannelId());
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auto* data_controller = data_pipeline_manager_->GetDataController(cid);
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if (data_controller == nullptr) {
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// TODO(b/150170271): Buffer a few packets before data controller is attached
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LOG_WARN("Received a packet without data controller. cid: %d", cid);
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buffered_packets_.emplace(*packet);
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LOG_WARN("Enqueued the unexpected packet. Current queue size: %zu", buffered_packets_.size());
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buffer_timer_.Schedule(
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common::BindOnce(&Receiver::check_buffered_packets, common::Unretained(this)), std::chrono::milliseconds(500));
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return;
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}
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data_controller->OnPdu(*packet);
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}
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void Receiver::check_buffered_packets() {
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while (!buffered_packets_.empty()) {
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auto packet = buffered_packets_.front();
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buffered_packets_.pop();
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auto basic_frame_view = BasicFrameView::Create(packet);
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if (!basic_frame_view.IsValid()) {
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LOG_WARN("Received an invalid basic frame");
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return;
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}
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Cid cid = static_cast<Cid>(basic_frame_view.GetChannelId());
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auto* data_controller = data_pipeline_manager_->GetDataController(cid);
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if (data_controller == nullptr) {
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LOG_ERROR("Dropping a packet with invalid cid: %d", cid);
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} else {
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data_controller->OnPdu(packet);
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}
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}
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}
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} // namespace internal
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} // namespace l2cap
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} // namespace bluetooth
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