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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/chunk/abort_chunk.h"
#include <stdint.h>
#include <optional>
#include <utility>
#include <vector>
#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/error_cause/error_cause.h"
#include "net/dcsctp/packet/tlv_trait.h"
namespace dcsctp {
// 0 1 2 3
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | Type = 6 |Reserved |T| Length |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// \ \
// / zero or more Error Causes /
// \ \
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
constexpr int AbortChunk::kType;
std::optional<AbortChunk> AbortChunk::Parse(
rtc::ArrayView<const uint8_t> data) {
std::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data);
if (!reader.has_value()) {
return std::nullopt;
}
std::optional<Parameters> error_causes =
Parameters::Parse(reader->variable_data());
if (!error_causes.has_value()) {
return std::nullopt;
}
uint8_t flags = reader->Load8<1>();
bool filled_in_verification_tag = (flags & (1 << kFlagsBitT)) == 0;
return AbortChunk(filled_in_verification_tag, *std::move(error_causes));
}
void AbortChunk::SerializeTo(std::vector<uint8_t>& out) const {
rtc::ArrayView<const uint8_t> error_causes = error_causes_.data();
BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, error_causes.size());
writer.Store8<1>(filled_in_verification_tag_ ? 0 : (1 << kFlagsBitT));
writer.CopyToVariableData(error_causes);
}
std::string AbortChunk::ToString() const {
return "ABORT";
}
} // namespace dcsctp