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/*
* 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.
*/
#include "net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.h"
#include <cstdint>
#include <string>
#include <utility>
#include <vector>
#include "absl/types/optional.h"
#include "api/array_view.h"
#include "net/dcsctp/packet/bounded_byte_reader.h"
#include "net/dcsctp/packet/bounded_byte_writer.h"
#include "net/dcsctp/packet/tlv_trait.h"
#include "rtc_base/strings/string_builder.h"
namespace dcsctp {
// https://tools.ietf.org/html/rfc4960#section-3.3.10.6
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | Cause Code=6 | Cause Length |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// / Unrecognized Chunk /
// \ \
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
constexpr int UnrecognizedChunkTypeCause::kType;
absl::optional<UnrecognizedChunkTypeCause> UnrecognizedChunkTypeCause::Parse(
rtc::ArrayView<const uint8_t> data) {
absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data);
if (!reader.has_value()) {
return absl::nullopt;
}
std::vector<uint8_t> unrecognized_chunk(reader->variable_data().begin(),
reader->variable_data().end());
return UnrecognizedChunkTypeCause(std::move(unrecognized_chunk));
}
void UnrecognizedChunkTypeCause::SerializeTo(std::vector<uint8_t>& out) const {
BoundedByteWriter<kHeaderSize> writer =
AllocateTLV(out, unrecognized_chunk_.size());
writer.CopyToVariableData(unrecognized_chunk_);
}
std::string UnrecognizedChunkTypeCause::ToString() const {
rtc::StringBuilder sb;
sb << "Unrecognized Chunk Type, chunk_type=";
if (!unrecognized_chunk_.empty()) {
sb << static_cast<int>(unrecognized_chunk_[0]);
} else {
sb << "<missing>";
}
return sb.Release();
}
} // namespace dcsctp
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