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Diffstat (limited to 'third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.h')
-rw-r--r-- | third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.h new file mode 100644 index 0000000000..b9ef666f41 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.h @@ -0,0 +1,55 @@ +/* + * Copyright (c) 2021 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/chunk/forward_tsn_common.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc3758#section-3.2 +struct ForwardTsnChunkConfig : ChunkConfig { + static constexpr int kType = 192; + static constexpr size_t kHeaderSize = 8; + static constexpr size_t kVariableLengthAlignment = 4; +}; + +class ForwardTsnChunk : public AnyForwardTsnChunk, + public TLVTrait<ForwardTsnChunkConfig> { + public: + static constexpr int kType = ForwardTsnChunkConfig::kType; + + ForwardTsnChunk(TSN new_cumulative_tsn, + std::vector<SkippedStream> skipped_streams) + : AnyForwardTsnChunk(new_cumulative_tsn, std::move(skipped_streams)) {} + + static absl::optional<ForwardTsnChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + private: + static constexpr size_t kSkippedStreamBufferSize = 4; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_CHUNK_H_ |