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/*
* 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
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