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https://github.com/mollyim/webrtc.git
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0e73602a9f
Adding strong types went a little too far as these two types represent the same sequence number. A "request sequence number" is a number, that - when responded to - will be used as "response sequence number". Having them separate added confusion and just a lot of type-casting. Bug: webrtc:12614 Change-Id: I4636ea8f2252023a2d5a9b7033763e1978b1812e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/214130 Commit-Queue: Victor Boivie <boivie@webrtc.org> Reviewed-by: Florent Castelli <orphis@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33789}
78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
/*
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* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef NET_DCSCTP_PACKET_PARAMETER_OUTGOING_SSN_RESET_REQUEST_PARAMETER_H_
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#define NET_DCSCTP_PACKET_PARAMETER_OUTGOING_SSN_RESET_REQUEST_PARAMETER_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <cstdint>
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#include <string>
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#include <utility>
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#include <vector>
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#include "absl/strings/string_view.h"
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#include "api/array_view.h"
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#include "net/dcsctp/common/internal_types.h"
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#include "net/dcsctp/packet/parameter/parameter.h"
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#include "net/dcsctp/packet/tlv_trait.h"
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#include "net/dcsctp/public/types.h"
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namespace dcsctp {
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// https://tools.ietf.org/html/rfc6525#section-4.1
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struct OutgoingSSNResetRequestParameterConfig : ParameterConfig {
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static constexpr int kType = 13;
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static constexpr size_t kHeaderSize = 16;
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static constexpr size_t kVariableLengthAlignment = 2;
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};
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class OutgoingSSNResetRequestParameter
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: public Parameter,
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public TLVTrait<OutgoingSSNResetRequestParameterConfig> {
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public:
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static constexpr int kType = OutgoingSSNResetRequestParameterConfig::kType;
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explicit OutgoingSSNResetRequestParameter(
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ReconfigRequestSN request_sequence_number,
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ReconfigRequestSN response_sequence_number,
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TSN sender_last_assigned_tsn,
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std::vector<StreamID> stream_ids)
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: request_sequence_number_(request_sequence_number),
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response_sequence_number_(response_sequence_number),
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sender_last_assigned_tsn_(sender_last_assigned_tsn),
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stream_ids_(std::move(stream_ids)) {}
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static absl::optional<OutgoingSSNResetRequestParameter> Parse(
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rtc::ArrayView<const uint8_t> data);
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void SerializeTo(std::vector<uint8_t>& out) const override;
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std::string ToString() const override;
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ReconfigRequestSN request_sequence_number() const {
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return request_sequence_number_;
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}
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ReconfigRequestSN response_sequence_number() const {
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return response_sequence_number_;
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}
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TSN sender_last_assigned_tsn() const { return sender_last_assigned_tsn_; }
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rtc::ArrayView<const StreamID> stream_ids() const { return stream_ids_; }
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private:
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static constexpr size_t kStreamIdSize = sizeof(uint16_t);
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ReconfigRequestSN request_sequence_number_;
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ReconfigRequestSN response_sequence_number_;
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TSN sender_last_assigned_tsn_;
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std::vector<StreamID> stream_ids_;
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};
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} // namespace dcsctp
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#endif // NET_DCSCTP_PACKET_PARAMETER_OUTGOING_SSN_RESET_REQUEST_PARAMETER_H_
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