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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.
*/
#ifndef NET_DCSCTP_PACKET_CHUNK_DATA_CHUNK_H_
#define NET_DCSCTP_PACKET_CHUNK_DATA_CHUNK_H_
#include <stddef.h>
#include <stdint.h>
#include <cstdint>
#include <string>
#include <utility>
#include <vector>
#include "absl/strings/string_view.h"
#include "api/array_view.h"
#include "net/dcsctp/packet/chunk/chunk.h"
#include "net/dcsctp/packet/chunk/data_common.h"
#include "net/dcsctp/packet/data.h"
#include "net/dcsctp/packet/tlv_trait.h"
namespace dcsctp {
// https://tools.ietf.org/html/rfc4960#section-3.3.1
struct DataChunkConfig : ChunkConfig {
static constexpr int kType = 0;
static constexpr size_t kHeaderSize = 16;
static constexpr size_t kVariableLengthAlignment = 1;
};
class DataChunk : public AnyDataChunk, public TLVTrait<DataChunkConfig> {
public:
static constexpr int kType = DataChunkConfig::kType;
// Exposed to allow the retransmission queue to make room for the correct
// header size.
static constexpr size_t kHeaderSize = DataChunkConfig::kHeaderSize;
DataChunk(TSN tsn,
StreamID stream_id,
SSN ssn,
PPID ppid,
std::vector<uint8_t> payload,
const Options& options)
: AnyDataChunk(tsn,
stream_id,
ssn,
MID(0),
FSN(0),
ppid,
std::move(payload),
options) {}
DataChunk(TSN tsn, Data&& data, bool immediate_ack)
: AnyDataChunk(tsn, std::move(data), immediate_ack) {}
static absl::optional<DataChunk> Parse(rtc::ArrayView<const uint8_t> data);
void SerializeTo(std::vector<uint8_t>& out) const override;
std::string ToString() const override;
};
} // namespace dcsctp
#endif // NET_DCSCTP_PACKET_CHUNK_DATA_CHUNK_H_
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