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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.
*/
#pragma once
#include <memory>
#include <queue>
#include <unordered_map>
#include <utility>
#include "common/bidi_queue.h"
#include "l2cap/cid.h"
#include "l2cap/internal/channel_impl.h"
#include "l2cap/internal/scheduler.h"
#include "l2cap/l2cap_packets.h"
#include "l2cap/mtu.h"
#include "os/alarm.h"
#include "os/queue.h"
#include "packet/base_packet_builder.h"
#include "packet/packet_view.h"
namespace bluetooth {
namespace l2cap {
namespace internal {
class DataPipelineManager;
/**
* Handle receiving L2CAP PDUs from link queue and distribute them into into channel data controllers.
* Dequeue incoming packets from LinkQueueUpEnd, and enqueue it to ChannelQueueDownEnd. Note: If a channel
* cannot dequeue from ChannelQueueDownEnd so that the buffer for incoming packet is full, further incoming packets will
* be dropped.
* The Reassembler keeps the reference to ChannelImpl objects, because it needs to check channel mode and parameters.
* The Reassembler also keeps the reference to Scheduler, to get Segmenter and send signals (Tx, Rx seq) to it.
*/
class Receiver {
public:
using UpperEnqueue = packet::PacketView<packet::kLittleEndian>;
using UpperDequeue = packet::BasePacketBuilder;
using UpperQueueDownEnd = common::BidiQueueEnd<UpperEnqueue, UpperDequeue>;
using LowerEnqueue = UpperDequeue;
using LowerDequeue = UpperEnqueue;
using LowerQueueUpEnd = common::BidiQueueEnd<LowerEnqueue, LowerDequeue>;
Receiver(LowerQueueUpEnd* link_queue_up_end, os::Handler* handler, DataPipelineManager* data_pipeline_manager);
~Receiver();
private:
LowerQueueUpEnd* link_queue_up_end_;
os::Handler* handler_;
os::Alarm buffer_timer_;
std::queue<LowerDequeue> buffered_packets_;
DataPipelineManager* data_pipeline_manager_;
void link_queue_dequeue_callback();
void check_buffered_packets();
};
} // namespace internal
} // namespace l2cap
} // namespace bluetooth
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