| /** @file |
| * |
| * A brief file description |
| * |
| * @section license License |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 "QUICFrame.h" |
| #include "QUICTransferProgressProvider.h" |
| |
| enum class QUICSendStreamState { |
| Init, |
| Ready, |
| Send, |
| DataSent, |
| DataRecvd, |
| ResetSent, |
| ResetRecvd, |
| }; |
| |
| enum class QUICReceiveStreamState { |
| Init, |
| Recv, |
| SizeKnown, |
| DataRecvd, |
| ResetRecvd, |
| DataRead, |
| ResetRead, |
| }; |
| |
| enum class QUICBidirectionalStreamState { |
| Init, |
| Idle, |
| Open, |
| HC_R, |
| HC_L, |
| Closed, |
| Invalid, |
| }; |
| |
| template <class T> class QUICStreamStateMachine |
| { |
| public: |
| virtual ~QUICStreamStateMachine() {} |
| |
| virtual T |
| get() const |
| { |
| return this->_state; |
| } |
| |
| virtual void update_with_sending_frame(const QUICFrame &frame) = 0; |
| virtual void update_with_receiving_frame(const QUICFrame &frame) = 0; |
| |
| virtual bool is_allowed_to_send(QUICFrameType type) const = 0; |
| virtual bool is_allowed_to_send(const QUICFrame &frame) const = 0; |
| virtual bool is_allowed_to_receive(QUICFrameType type) const = 0; |
| virtual bool is_allowed_to_receive(const QUICFrame &frame) const = 0; |
| |
| protected: |
| void |
| _set_state(T s) |
| { |
| ink_assert(s != T::Init); |
| this->_state = s; |
| } |
| |
| private: |
| T _state = T::Init; |
| }; |
| |
| class QUICUnidirectionalStreamStateMachine |
| { |
| public: |
| QUICUnidirectionalStreamStateMachine(QUICTransferProgressProvider *in, QUICTransferProgressProvider *out) |
| : _in_progress(in), _out_progress(out) |
| { |
| } |
| |
| protected: |
| QUICTransferProgressProvider *_in_progress = nullptr; |
| QUICTransferProgressProvider *_out_progress = nullptr; |
| }; |
| |
| class QUICSendStreamStateMachine : public QUICUnidirectionalStreamStateMachine, public QUICStreamStateMachine<QUICSendStreamState> |
| { |
| public: |
| QUICSendStreamStateMachine(QUICTransferProgressProvider *in, QUICTransferProgressProvider *out) |
| : QUICUnidirectionalStreamStateMachine(in, out) |
| { |
| this->_set_state(QUICSendStreamState::Ready); |
| } |
| |
| void update_with_sending_frame(const QUICFrame &frame) override; |
| void update_with_receiving_frame(const QUICFrame &frame) override; |
| void update_on_ack(); |
| |
| bool is_allowed_to_send(QUICFrameType type) const override; |
| bool is_allowed_to_send(const QUICFrame &frame) const override; |
| bool is_allowed_to_receive(QUICFrameType type) const override; |
| bool is_allowed_to_receive(const QUICFrame &frame) const override; |
| |
| void update(const QUICReceiveStreamState opposite_side); |
| }; |
| |
| class QUICReceiveStreamStateMachine : public QUICUnidirectionalStreamStateMachine, |
| public QUICStreamStateMachine<QUICReceiveStreamState> |
| { |
| public: |
| QUICReceiveStreamStateMachine(QUICTransferProgressProvider *in, QUICTransferProgressProvider *out) |
| : QUICUnidirectionalStreamStateMachine(in, out) |
| { |
| } |
| |
| void update_with_sending_frame(const QUICFrame &frame) override; |
| void update_with_receiving_frame(const QUICFrame &frame) override; |
| void update_on_read(); |
| void update_on_eos(); |
| |
| bool is_allowed_to_send(QUICFrameType type) const override; |
| bool is_allowed_to_send(const QUICFrame &frame) const override; |
| bool is_allowed_to_receive(QUICFrameType type) const override; |
| bool is_allowed_to_receive(const QUICFrame &frame) const override; |
| |
| void update(const QUICSendStreamState opposite_side); |
| }; |
| |
| class QUICBidirectionalStreamStateMachine : public QUICStreamStateMachine<QUICBidirectionalStreamState> |
| { |
| public: |
| QUICBidirectionalStreamStateMachine(QUICTransferProgressProvider *send_in, QUICTransferProgressProvider *send_out, |
| QUICTransferProgressProvider *recv_in, QUICTransferProgressProvider *recv_out) |
| : _send_stream_state(send_in, send_out), _recv_stream_state(recv_in, recv_out) |
| { |
| this->_recv_stream_state.update(this->_send_stream_state.get()); |
| }; |
| |
| QUICBidirectionalStreamState get() const override; |
| |
| void update_with_sending_frame(const QUICFrame &frame) override; |
| void update_with_receiving_frame(const QUICFrame &frame) override; |
| void update_on_ack(); |
| void update_on_read(); |
| void update_on_eos(); |
| |
| bool is_allowed_to_send(QUICFrameType type) const override; |
| bool is_allowed_to_send(const QUICFrame &frame) const override; |
| bool is_allowed_to_receive(QUICFrameType type) const override; |
| bool is_allowed_to_receive(const QUICFrame &frame) const override; |
| |
| private: |
| QUICSendStreamStateMachine _send_stream_state; |
| QUICReceiveStreamStateMachine _recv_stream_state; |
| }; |