97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
/*
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* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef NET_DCSCTP_PACKET_PARAMETER_PARAMETER_H_
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#define NET_DCSCTP_PACKET_PARAMETER_PARAMETER_H_
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#include <stddef.h>
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#include <algorithm>
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#include <cstdint>
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#include <iterator>
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#include <memory>
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#include <string>
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#include <type_traits>
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#include <utility>
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#include <vector>
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#include "absl/algorithm/container.h"
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#include "absl/strings/string_view.h"
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#include "absl/types/optional.h"
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#include "api/array_view.h"
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#include "net/dcsctp/packet/tlv_trait.h"
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#include "rtc_base/strings/string_builder.h"
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namespace dcsctp {
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class Parameter {
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public:
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Parameter() {}
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virtual ~Parameter() = default;
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Parameter(const Parameter& other) = default;
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Parameter& operator=(const Parameter& other) = default;
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virtual void SerializeTo(std::vector<uint8_t>& out) const = 0;
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virtual std::string ToString() const = 0;
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};
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struct ParameterDescriptor {
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ParameterDescriptor(uint16_t type, rtc::ArrayView<const uint8_t> data)
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: type(type), data(data) {}
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uint16_t type;
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rtc::ArrayView<const uint8_t> data;
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};
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class Parameters {
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public:
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class Builder {
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public:
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Builder() {}
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Builder& Add(const Parameter& p);
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Parameters Build() { return Parameters(std::move(data_)); }
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private:
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std::vector<uint8_t> data_;
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};
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static absl::optional<Parameters> Parse(rtc::ArrayView<const uint8_t> data);
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Parameters() {}
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Parameters(Parameters&& other) = default;
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Parameters& operator=(Parameters&& other) = default;
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rtc::ArrayView<const uint8_t> data() const { return data_; }
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std::vector<ParameterDescriptor> descriptors() const;
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template <typename P>
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absl::optional<P> get() const {
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static_assert(std::is_base_of<Parameter, P>::value,
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"Template parameter not derived from Parameter");
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for (const auto& p : descriptors()) {
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if (p.type == P::kType) {
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return P::Parse(p.data);
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}
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}
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return absl::nullopt;
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}
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private:
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explicit Parameters(std::vector<uint8_t> data) : data_(std::move(data)) {}
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std::vector<uint8_t> data_;
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};
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struct ParameterConfig {
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static constexpr int kTypeSizeInBytes = 2;
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};
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} // namespace dcsctp
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#endif // NET_DCSCTP_PACKET_PARAMETER_PARAMETER_H_
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