1 files changed, 70 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk.h
new file mode 100644
index 0000000000..8cdf2a1fc4
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+++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk.h
@@ -0,0 +1,70 @@
+/*
+ *  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_IDATA_CHUNK_H_
+#define NET_DCSCTP_PACKET_CHUNK_IDATA_CHUNK_H_
+#include <stddef.h>
+#include <stdint.h>
+
+#include <cstdint>
+#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/data_common.h"
+#include "net/dcsctp/packet/data.h"
+#include "net/dcsctp/packet/tlv_trait.h"
+
+namespace dcsctp {
+
+// https://tools.ietf.org/html/rfc8260#section-2.1
+struct IDataChunkConfig : ChunkConfig {
+  static constexpr int kType = 64;
+  static constexpr size_t kHeaderSize = 20;
+  static constexpr size_t kVariableLengthAlignment = 1;
+};
+
+class IDataChunk : public AnyDataChunk, public TLVTrait<IDataChunkConfig> {
+ public:
+  static constexpr int kType = IDataChunkConfig::kType;
+
+  // Exposed to allow the retransmission queue to make room for the correct
+  // header size.
+  static constexpr size_t kHeaderSize = IDataChunkConfig::kHeaderSize;
+  IDataChunk(TSN tsn,
+             StreamID stream_id,
+             MID message_id,
+             PPID ppid,
+             FSN fsn,
+             std::vector<uint8_t> payload,
+             const Options& options)
+      : AnyDataChunk(tsn,
+                     stream_id,
+                     SSN(0),
+                     message_id,
+                     fsn,
+                     ppid,
+                     std::move(payload),
+                     options) {}
+
+  explicit IDataChunk(TSN tsn, Data&& data, bool immediate_ack)
+      : AnyDataChunk(tsn, std::move(data), immediate_ack) {}
+
+  static absl::optional<IDataChunk> Parse(rtc::ArrayView<const uint8_t> data);
+
+  void SerializeTo(std::vector<uint8_t>& out) const override;
+  std::string ToString() const override;
+};
+
+}  // namespace dcsctp
+
+#endif  // NET_DCSCTP_PACKET_CHUNK_IDATA_CHUNK_H_