| /* |
| * 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/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 ErtmController : public DataController { |
| public: |
| using UpperEnqueue = packet::PacketView<packet::kLittleEndian>; |
| using UpperDequeue = packet::BasePacketBuilder; |
| using UpperQueueDownEnd = common::BidiQueueEnd<UpperEnqueue, UpperDequeue>; |
| ErtmController(Cid cid, Cid remote_cid, UpperQueueDownEnd* channel_queue_end, os::Handler* handler, |
| Scheduler* scheduler); |
| ~ErtmController(); |
| // Segmentation is handled here |
| void OnSdu(std::unique_ptr<packet::BasePacketBuilder> sdu) override; |
| void OnPdu(BasicFrameView pdu) override; |
| std::unique_ptr<BasicFrameBuilder> GetNextPacket() override; |
| |
| private: |
| [[maybe_unused]] Cid cid_; |
| [[maybe_unused]] Cid remote_cid_; |
| [[maybe_unused]] os::EnqueueBuffer<UpperEnqueue> enqueue_buffer_; |
| [[maybe_unused]] os::Handler* handler_; |
| std::queue<std::unique_ptr<BasicFrameBuilder>> pdu_queue_; |
| [[maybe_unused]] Scheduler* scheduler_; |
| // TODO: Support FCS |
| [[maybe_unused]] FcsType fcs_type_ = FcsType::NO_FCS; |
| |
| class PacketViewForReassembly : public packet::PacketView<kLittleEndian> { |
| public: |
| PacketViewForReassembly(const PacketView& packetView) : PacketView(packetView) {} |
| PacketViewForReassembly(nullptr_t) : PacketView(nullptr) {} |
| void AppendPacketView(packet::PacketView<kLittleEndian> to_append) { |
| Append(to_append); |
| } |
| }; |
| |
| class CopyablePacketBuilder : public packet::BasePacketBuilder { |
| public: |
| CopyablePacketBuilder(std::unique_ptr<packet::BasePacketBuilder> builder) : builder_(builder.release()) {} |
| |
| void Serialize(BitInserter& it) const override; |
| |
| size_t size() const override; |
| |
| std::unique_ptr<packet::BasePacketBuilder> Create(); |
| |
| private: |
| std::shared_ptr<packet::BasePacketBuilder> builder_; |
| }; |
| |
| PacketViewForReassembly reassembly_stage_{nullptr}; |
| SegmentationAndReassembly sar_state_ = SegmentationAndReassembly::END; |
| |
| void stage_for_reassembly(SegmentationAndReassembly sar, const packet::PacketView<kLittleEndian>& payload); |
| void send_pdu(std::unique_ptr<BasicFrameBuilder> pdu); |
| |
| void close_channel(); |
| |
| // Configuration options |
| // TODO: Configure these number |
| [[maybe_unused]] uint16_t local_tx_window_ = 10; |
| [[maybe_unused]] uint16_t local_max_transmit_ = 20; |
| [[maybe_unused]] uint16_t local_retransmit_timeout_ms_ = 2000; |
| [[maybe_unused]] uint16_t local_monitor_timeout_ms_ = 12000; |
| [[maybe_unused]] uint16_t local_mps_ = 1010; |
| |
| [[maybe_unused]] uint16_t remote_tx_window_ = 10; |
| [[maybe_unused]] uint16_t remote_max_transmit_ = 20; |
| [[maybe_unused]] uint16_t remote_retransmit_timeout_ms_ = 2000; |
| [[maybe_unused]] uint16_t remote_monitor_timeout_ms_ = 12000; |
| [[maybe_unused]] uint16_t remote_mps_ = 1010; |
| |
| struct impl; |
| std::unique_ptr<impl> pimpl_; |
| }; |
| |
| } // namespace internal |
| } // namespace l2cap |
| } // namespace bluetooth |