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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_INIT_CHUNK_H_
#define NET_DCSCTP_PACKET_CHUNK_INIT_CHUNK_H_
#include <stddef.h>
#include <stdint.h>
#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/parameter/parameter.h"
#include "net/dcsctp/packet/tlv_trait.h"
namespace dcsctp {
// https://tools.ietf.org/html/rfc4960#section-3.3.2
struct InitChunkConfig : ChunkConfig {
static constexpr int kType = 1;
static constexpr size_t kHeaderSize = 20;
static constexpr size_t kVariableLengthAlignment = 1;
};
class InitChunk : public Chunk, public TLVTrait<InitChunkConfig> {
public:
static constexpr int kType = InitChunkConfig::kType;
InitChunk(VerificationTag initiate_tag,
uint32_t a_rwnd,
uint16_t nbr_outbound_streams,
uint16_t nbr_inbound_streams,
TSN initial_tsn,
Parameters parameters)
: initiate_tag_(initiate_tag),
a_rwnd_(a_rwnd),
nbr_outbound_streams_(nbr_outbound_streams),
nbr_inbound_streams_(nbr_inbound_streams),
initial_tsn_(initial_tsn),
parameters_(std::move(parameters)) {}
InitChunk(InitChunk&& other) = default;
InitChunk& operator=(InitChunk&& other) = default;
static absl::optional<InitChunk> Parse(rtc::ArrayView<const uint8_t> data);
void SerializeTo(std::vector<uint8_t>& out) const override;
std::string ToString() const override;
VerificationTag initiate_tag() const { return initiate_tag_; }
uint32_t a_rwnd() const { return a_rwnd_; }
uint16_t nbr_outbound_streams() const { return nbr_outbound_streams_; }
uint16_t nbr_inbound_streams() const { return nbr_inbound_streams_; }
TSN initial_tsn() const { return initial_tsn_; }
const Parameters& parameters() const { return parameters_; }
private:
VerificationTag initiate_tag_;
uint32_t a_rwnd_;
uint16_t nbr_outbound_streams_;
uint16_t nbr_inbound_streams_;
TSN initial_tsn_;
Parameters parameters_;
};
} // namespace dcsctp
#endif // NET_DCSCTP_PACKET_CHUNK_INIT_CHUNK_H_
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