1 files changed, 92 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter.h
new file mode 100644
index 0000000000..c5a68acb33
--- /dev/null
+++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter.h
@@ -0,0 +1,92 @@
+/*
+ *  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_PARAMETER_RECONFIGURATION_RESPONSE_PARAMETER_H_
+#define NET_DCSCTP_PACKET_PARAMETER_RECONFIGURATION_RESPONSE_PARAMETER_H_
+#include <stddef.h>
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+#include "api/array_view.h"
+#include "net/dcsctp/common/internal_types.h"
+#include "net/dcsctp/packet/parameter/parameter.h"
+#include "net/dcsctp/packet/tlv_trait.h"
+
+namespace dcsctp {
+
+// https://tools.ietf.org/html/rfc6525#section-4.4
+struct ReconfigurationResponseParameterConfig : ParameterConfig {
+  static constexpr int kType = 16;
+  static constexpr size_t kHeaderSize = 12;
+  static constexpr size_t kVariableLengthAlignment = 4;
+};
+
+class ReconfigurationResponseParameter
+    : public Parameter,
+      public TLVTrait<ReconfigurationResponseParameterConfig> {
+ public:
+  static constexpr int kType = ReconfigurationResponseParameterConfig::kType;
+
+  enum class Result {
+    kSuccessNothingToDo = 0,
+    kSuccessPerformed = 1,
+    kDenied = 2,
+    kErrorWrongSSN = 3,
+    kErrorRequestAlreadyInProgress = 4,
+    kErrorBadSequenceNumber = 5,
+    kInProgress = 6,
+  };
+
+  ReconfigurationResponseParameter(ReconfigRequestSN response_sequence_number,
+                                   Result result)
+      : response_sequence_number_(response_sequence_number),
+        result_(result),
+        sender_next_tsn_(absl::nullopt),
+        receiver_next_tsn_(absl::nullopt) {}
+
+  explicit ReconfigurationResponseParameter(
+      ReconfigRequestSN response_sequence_number,
+      Result result,
+      TSN sender_next_tsn,
+      TSN receiver_next_tsn)
+      : response_sequence_number_(response_sequence_number),
+        result_(result),
+        sender_next_tsn_(sender_next_tsn),
+        receiver_next_tsn_(receiver_next_tsn) {}
+
+  static absl::optional<ReconfigurationResponseParameter> Parse(
+      rtc::ArrayView<const uint8_t> data);
+
+  void SerializeTo(std::vector<uint8_t>& out) const override;
+  std::string ToString() const override;
+
+  ReconfigRequestSN response_sequence_number() const {
+    return response_sequence_number_;
+  }
+  Result result() const { return result_; }
+  absl::optional<TSN> sender_next_tsn() const { return sender_next_tsn_; }
+  absl::optional<TSN> receiver_next_tsn() const { return receiver_next_tsn_; }
+
+ private:
+  static constexpr size_t kNextTsnHeaderSize = 8;
+  ReconfigRequestSN response_sequence_number_;
+  Result result_;
+  absl::optional<TSN> sender_next_tsn_;
+  absl::optional<TSN> receiver_next_tsn_;
+};
+
+absl::string_view ToString(ReconfigurationResponseParameter::Result result);
+
+}  // namespace dcsctp
+
+#endif  // NET_DCSCTP_PACKET_PARAMETER_RECONFIGURATION_RESPONSE_PARAMETER_H_