1 files changed, 96 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter.h
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index 0000000000..e8fa67c8f7
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+++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter.h
@@ -0,0 +1,96 @@
+/*
+ *  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_PARAMETER_H_
+#define NET_DCSCTP_PACKET_PARAMETER_PARAMETER_H_
+
+#include <stddef.h>
+
+#include <algorithm>
+#include <cstdint>
+#include <iterator>
+#include <memory>
+#include <string>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#include "absl/algorithm/container.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+#include "api/array_view.h"
+#include "net/dcsctp/packet/tlv_trait.h"
+#include "rtc_base/strings/string_builder.h"
+
+namespace dcsctp {
+
+class Parameter {
+ public:
+  Parameter() {}
+  virtual ~Parameter() = default;
+
+  Parameter(const Parameter& other) = default;
+  Parameter& operator=(const Parameter& other) = default;
+
+  virtual void SerializeTo(std::vector<uint8_t>& out) const = 0;
+  virtual std::string ToString() const = 0;
+};
+
+struct ParameterDescriptor {
+  ParameterDescriptor(uint16_t type, rtc::ArrayView<const uint8_t> data)
+      : type(type), data(data) {}
+  uint16_t type;
+  rtc::ArrayView<const uint8_t> data;
+};
+
+class Parameters {
+ public:
+  class Builder {
+   public:
+    Builder() {}
+    Builder& Add(const Parameter& p);
+    Parameters Build() { return Parameters(std::move(data_)); }
+
+   private:
+    std::vector<uint8_t> data_;
+  };
+
+  static absl::optional<Parameters> Parse(rtc::ArrayView<const uint8_t> data);
+
+  Parameters() {}
+  Parameters(Parameters&& other) = default;
+  Parameters& operator=(Parameters&& other) = default;
+
+  rtc::ArrayView<const uint8_t> data() const { return data_; }
+  std::vector<ParameterDescriptor> descriptors() const;
+
+  template <typename P>
+  absl::optional<P> get() const {
+    static_assert(std::is_base_of<Parameter, P>::value,
+                  "Template parameter not derived from Parameter");
+    for (const auto& p : descriptors()) {
+      if (p.type == P::kType) {
+        return P::Parse(p.data);
+      }
+    }
+    return absl::nullopt;
+  }
+
+ private:
+  explicit Parameters(std::vector<uint8_t> data) : data_(std::move(data)) {}
+  std::vector<uint8_t> data_;
+};
+
+struct ParameterConfig {
+  static constexpr int kTypeSizeInBytes = 2;
+};
+
+}  // namespace dcsctp
+
+#endif  // NET_DCSCTP_PACKET_PARAMETER_PARAMETER_H_