| /* |
| * 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 <string> |
| #include <unordered_map> |
| |
| #include "common/bidi_queue.h" |
| #include "common/bind.h" |
| #include "data_controller.h" |
| #include "l2cap/cid.h" |
| #include "l2cap/internal/channel_impl.h" |
| #include "l2cap/internal/data_controller.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 Scheduler; |
| |
| /** |
| * A middle layer between L2CAP channel and outgoing packet scheduler. |
| * Fetches data (SDU) from an L2CAP channel queue end, handles L2CAP segmentation, and gives data to L2CAP scheduler. |
| */ |
| class Sender { |
| public: |
| using UpperEnqueue = packet::PacketView<packet::kLittleEndian>; |
| using UpperDequeue = packet::BasePacketBuilder; |
| using UpperQueueDownEnd = common::BidiQueueEnd<UpperEnqueue, UpperDequeue>; |
| |
| Sender(os::Handler* handler, Scheduler* scheduler, std::shared_ptr<ChannelImpl> channel); |
| ~Sender(); |
| |
| /** |
| * Callback from scheduler to indicate that scheduler already dequeued a packet from segmenter's queue. |
| * Segmenter can continue dequeuing from channel queue end. |
| */ |
| void OnPacketSent(); |
| |
| /** |
| * Called by the scheduler to return the next PDU to be sent |
| */ |
| std::unique_ptr<UpperDequeue> GetNextPacket(); |
| |
| void SetChannelRetransmissionFlowControlMode(RetransmissionAndFlowControlModeOption mode); |
| |
| DataController* GetDataController(); |
| |
| private: |
| os::Handler* handler_; |
| UpperQueueDownEnd* queue_end_; |
| Scheduler* scheduler_; |
| const Cid channel_id_; |
| const Cid remote_channel_id_; |
| bool is_dequeue_registered_ = false; |
| RetransmissionAndFlowControlModeOption mode_ = RetransmissionAndFlowControlModeOption::L2CAP_BASIC; |
| std::unique_ptr<DataController> data_controller_; |
| |
| void try_register_dequeue(); |
| void dequeue_callback(); |
| }; |
| } // namespace internal |
| } // namespace l2cap |
| } // namespace bluetooth |