1 files changed, 53 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.h
new file mode 100644
index 0000000000..8148cca286
--- /dev/null
+++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.h
@@ -0,0 +1,53 @@
+/*
+ *  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_SHUTDOWN_CHUNK_H_
+#define NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_CHUNK_H_
+#include <stddef.h>
+#include <stdint.h>
+
+#include <string>
+#include <vector>
+
+#include "absl/strings/string_view.h"
+#include "api/array_view.h"
+#include "net/dcsctp/packet/chunk/chunk.h"
+#include "net/dcsctp/packet/tlv_trait.h"
+
+namespace dcsctp {
+
+// https://tools.ietf.org/html/rfc4960#section-3.3.8
+struct ShutdownChunkConfig : ChunkConfig {
+  static constexpr int kType = 7;
+  static constexpr size_t kHeaderSize = 8;
+  static constexpr size_t kVariableLengthAlignment = 0;
+};
+
+class ShutdownChunk : public Chunk, public TLVTrait<ShutdownChunkConfig> {
+ public:
+  static constexpr int kType = ShutdownChunkConfig::kType;
+
+  explicit ShutdownChunk(TSN cumulative_tsn_ack)
+      : cumulative_tsn_ack_(cumulative_tsn_ack) {}
+
+  static absl::optional<ShutdownChunk> Parse(
+      rtc::ArrayView<const uint8_t> data);
+
+  void SerializeTo(std::vector<uint8_t>& out) const override;
+  std::string ToString() const override;
+
+  TSN cumulative_tsn_ack() const { return cumulative_tsn_ack_; }
+
+ private:
+  TSN cumulative_tsn_ack_;
+};
+
+}  // namespace dcsctp
+
+#endif  // NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_CHUNK_H_