56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
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/*
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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_CHUNK_FORWARD_TSN_CHUNK_H_
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#define NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_CHUNK_H_
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#include <stddef.h>
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#include <stdint.h>
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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/packet/chunk/chunk.h"
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#include "net/dcsctp/packet/chunk/forward_tsn_common.h"
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#include "net/dcsctp/packet/tlv_trait.h"
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namespace dcsctp {
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// https://tools.ietf.org/html/rfc3758#section-3.2
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struct ForwardTsnChunkConfig : ChunkConfig {
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static constexpr int kType = 192;
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static constexpr size_t kHeaderSize = 8;
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static constexpr size_t kVariableLengthAlignment = 4;
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};
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class ForwardTsnChunk : public AnyForwardTsnChunk,
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public TLVTrait<ForwardTsnChunkConfig> {
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public:
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static constexpr int kType = ForwardTsnChunkConfig::kType;
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ForwardTsnChunk(TSN new_cumulative_tsn,
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std::vector<SkippedStream> skipped_streams)
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: AnyForwardTsnChunk(new_cumulative_tsn, std::move(skipped_streams)) {}
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static absl::optional<ForwardTsnChunk> 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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private:
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static constexpr size_t kSkippedStreamBufferSize = 4;
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};
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} // namespace dcsctp
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#endif // NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_CHUNK_H_
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