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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 <unordered_map>
#include <utility>
#include "common/bidi_queue.h"
#include "l2cap/cid.h"
#include "l2cap/internal/channel_impl.h"
#include "l2cap/internal/data_controller.h"
#include "l2cap/internal/ilink.h"
#include "l2cap/internal/scheduler.h"
#include "l2cap/l2cap_packets.h"
#include "l2cap/mtu.h"
#include "os/handler.h"
#include "os/queue.h"
#include "packet/base_packet_builder.h"
#include "packet/packet_view.h"
namespace bluetooth {
namespace l2cap {
namespace internal {
class LeCreditBasedDataController : public DataController {
public:
using UpperEnqueue = packet::PacketView<packet::kLittleEndian>;
using UpperDequeue = packet::BasePacketBuilder;
using UpperQueueDownEnd = common::BidiQueueEnd<UpperEnqueue, UpperDequeue>;
LeCreditBasedDataController(ILink* link, Cid cid, Cid remote_cid, UpperQueueDownEnd* channel_queue_end,
os::Handler* handler, Scheduler* scheduler);
void OnSdu(std::unique_ptr<packet::BasePacketBuilder> sdu) override;
void OnPdu(packet::PacketView<true> pdu) override;
std::unique_ptr<packet::BasePacketBuilder> GetNextPacket() override;
void EnableFcs(bool enabled) override {}
void SetRetransmissionAndFlowControlOptions(const RetransmissionAndFlowControlConfigurationOption& option) override {}
// TODO: Set MTU and MPS from signalling channel
void SetMtu(Mtu mtu);
void SetMps(uint16_t mps);
// TODO: Handle credits
void OnCredit(uint16_t credits);
private:
Cid cid_;
Cid remote_cid_;
os::EnqueueBuffer<UpperEnqueue> enqueue_buffer_;
os::Handler* handler_;
std::queue<std::unique_ptr<packet::BasePacketBuilder>> pdu_queue_;
Scheduler* scheduler_;
ILink* link_;
Mtu mtu_ = 512;
uint16_t mps_ = 251;
uint16_t credits_ = 0;
uint16_t pending_frames_count_ = 0;
class PacketViewForReassembly : public packet::PacketView<kLittleEndian> {
public:
PacketViewForReassembly(const PacketView& packetView) : PacketView(packetView) {}
void AppendPacketView(packet::PacketView<kLittleEndian> to_append) {
Append(to_append);
}
};
PacketViewForReassembly reassembly_stage_{PacketView<kLittleEndian>(std::make_shared<std::vector<uint8_t>>())};
uint16_t remaining_sdu_continuation_packet_size_ = 0;
};
} // namespace internal
} // namespace l2cap
} // namespace bluetooth
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