outgoing_ssn_reset_request_parameter.h

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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_PARAMETER_OUTGOING_SSN_RESET_REQUEST_PARAMETER_H_

#define NET_DCSCTP_PACKET_PARAMETER_OUTGOING_SSN_RESET_REQUEST_PARAMETER_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/common/internal_types.h"

#include "net/dcsctp/packet/parameter/parameter.h"

#include "net/dcsctp/packet/tlv_trait.h"

#include "net/dcsctp/public/types.h"

namespace dcsctp {

// https://tools.ietf.org/html/rfc6525#section-4.1

struct OutgoingSSNResetRequestParameterConfig : ParameterConfig {

  static constexpr int kType = 13;

  static constexpr size_t kHeaderSize = 16;

  static constexpr size_t kVariableLengthAlignment = 2;

};

class OutgoingSSNResetRequestParameter

    : public Parameter,

      public TLVTrait<OutgoingSSNResetRequestParameterConfig> {

 public:

  static constexpr int kType = OutgoingSSNResetRequestParameterConfig::kType;

  explicit OutgoingSSNResetRequestParameter(

      ReconfigRequestSN request_sequence_number,

      ReconfigRequestSN response_sequence_number,

      TSN sender_last_assigned_tsn,

      std::vector<StreamID> stream_ids)

      : request_sequence_number_(request_sequence_number),

        response_sequence_number_(response_sequence_number),

        sender_last_assigned_tsn_(sender_last_assigned_tsn),

        stream_ids_(std::move(stream_ids)) {}

  static std::optional<OutgoingSSNResetRequestParameter> Parse(

      rtc::ArrayView<const uint8_t> data);

  void SerializeTo(std::vector<uint8_t>& out) const override;

  std::string ToString() const override;

  ReconfigRequestSN request_sequence_number() const {

    return request_sequence_number_;

  ReconfigRequestSN response_sequence_number() const {

    return response_sequence_number_;

  TSN sender_last_assigned_tsn() const { return sender_last_assigned_tsn_; }

  rtc::ArrayView<const StreamID> stream_ids() const { return stream_ids_; }

 private:

  static constexpr size_t kStreamIdSize = sizeof(uint16_t);

  ReconfigRequestSN request_sequence_number_;

  ReconfigRequestSN response_sequence_number_;

  TSN sender_last_assigned_tsn_;

  std::vector<StreamID> stream_ids_;

};

}  // namespace dcsctp

#endif  // NET_DCSCTP_PACKET_PARAMETER_OUTGOING_SSN_RESET_REQUEST_PARAMETER_H_