78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
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/*
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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_CHUNK_INIT_ACK_CHUNK_H_
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#define NET_DCSCTP_PACKET_CHUNK_INIT_ACK_CHUNK_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <string>
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#include <utility>
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#include <vector>
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#include "absl/strings/string_view.h"
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#include "api/array_view.h"
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#include "net/dcsctp/packet/chunk/chunk.h"
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#include "net/dcsctp/packet/parameter/parameter.h"
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#include "net/dcsctp/packet/tlv_trait.h"
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namespace dcsctp {
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// https://tools.ietf.org/html/rfc4960#section-3.3.3
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struct InitAckChunkConfig : ChunkConfig {
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static constexpr int kType = 2;
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static constexpr size_t kHeaderSize = 20;
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static constexpr size_t kVariableLengthAlignment = 1;
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};
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class InitAckChunk : public Chunk, public TLVTrait<InitAckChunkConfig> {
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public:
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static constexpr int kType = InitAckChunkConfig::kType;
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InitAckChunk(VerificationTag initiate_tag,
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uint32_t a_rwnd,
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uint16_t nbr_outbound_streams,
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uint16_t nbr_inbound_streams,
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TSN initial_tsn,
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Parameters parameters)
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: initiate_tag_(initiate_tag),
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a_rwnd_(a_rwnd),
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nbr_outbound_streams_(nbr_outbound_streams),
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nbr_inbound_streams_(nbr_inbound_streams),
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initial_tsn_(initial_tsn),
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parameters_(std::move(parameters)) {}
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InitAckChunk(InitAckChunk&& other) = default;
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InitAckChunk& operator=(InitAckChunk&& other) = default;
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static absl::optional<InitAckChunk> Parse(rtc::ArrayView<const uint8_t> data);
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void SerializeTo(std::vector<uint8_t>& out) const override;
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std::string ToString() const override;
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VerificationTag initiate_tag() const { return initiate_tag_; }
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uint32_t a_rwnd() const { return a_rwnd_; }
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uint16_t nbr_outbound_streams() const { return nbr_outbound_streams_; }
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uint16_t nbr_inbound_streams() const { return nbr_inbound_streams_; }
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TSN initial_tsn() const { return initial_tsn_; }
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const Parameters& parameters() const { return parameters_; }
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private:
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VerificationTag initiate_tag_;
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uint32_t a_rwnd_;
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uint16_t nbr_outbound_streams_;
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uint16_t nbr_inbound_streams_;
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TSN initial_tsn_;
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Parameters parameters_;
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};
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} // namespace dcsctp
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#endif // NET_DCSCTP_PACKET_CHUNK_INIT_ACK_CHUNK_H_
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