1 files changed, 63 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk.h
new file mode 100644
index 0000000000..a6479f78b0
--- /dev/null
+++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk.h
@@ -0,0 +1,63 @@
+/*
+ *  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_HEARTBEAT_ACK_CHUNK_H_
+#define NET_DCSCTP_PACKET_CHUNK_HEARTBEAT_ACK_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/parameter/heartbeat_info_parameter.h"
+#include "net/dcsctp/packet/parameter/parameter.h"
+#include "net/dcsctp/packet/tlv_trait.h"
+
+namespace dcsctp {
+
+// https://tools.ietf.org/html/rfc4960#section-3.3.6
+struct HeartbeatAckChunkConfig : ChunkConfig {
+  static constexpr int kType = 5;
+  static constexpr size_t kHeaderSize = 4;
+  static constexpr size_t kVariableLengthAlignment = 1;
+};
+
+class HeartbeatAckChunk : public Chunk,
+                          public TLVTrait<HeartbeatAckChunkConfig> {
+ public:
+  static constexpr int kType = HeartbeatAckChunkConfig::kType;
+
+  explicit HeartbeatAckChunk(Parameters parameters)
+      : parameters_(std::move(parameters)) {}
+
+  HeartbeatAckChunk(HeartbeatAckChunk&& other) = default;
+  HeartbeatAckChunk& operator=(HeartbeatAckChunk&& other) = default;
+
+  static absl::optional<HeartbeatAckChunk> Parse(
+      rtc::ArrayView<const uint8_t> data);
+
+  void SerializeTo(std::vector<uint8_t>& out) const override;
+  std::string ToString() const override;
+
+  const Parameters& parameters() const { return parameters_; }
+
+  absl::optional<HeartbeatInfoParameter> info() const {
+    return parameters_.get<HeartbeatInfoParameter>();
+  }
+
+ private:
+  Parameters parameters_;
+};
+}  // namespace dcsctp
+
+#endif  // NET_DCSCTP_PACKET_CHUNK_HEARTBEAT_ACK_CHUNK_H_