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