data_generator.h - mozsearch

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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_TESTING_DATA_GENERATOR_H_

#define NET_DCSCTP_TESTING_DATA_GENERATOR_H_

#include <cstdint>

#include <optional>

#include <vector>

#include "absl/strings/string_view.h"

#include "api/array_view.h"

#include "net/dcsctp/common/internal_types.h"

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

namespace dcsctp {

struct DataGeneratorOptions {

  StreamID stream_id = StreamID(1);

  std::optional<MID> mid = std::nullopt;

  PPID ppid = PPID(53);

};

// Generates Data with correct sequence numbers, and used only in unit tests.

class DataGenerator {

 public:

  explicit DataGenerator(MID start_mid = MID(0)) : mid_(start_mid) {}

  // Generates ordered "data" with the provided `payload` and flags, which can

  // contain "B" for setting the "is_beginning" flag, and/or "E" for setting the

  // "is_end" flag.

  Data Ordered(std::vector<uint8_t> payload,

               absl::string_view flags = "",

               DataGeneratorOptions opts = {});

  // Generates unordered "data" with the provided `payload` and flags, which can

  // contain "B" for setting the "is_beginning" flag, and/or "E" for setting the

  // "is_end" flag.

  Data Unordered(std::vector<uint8_t> payload,

                 absl::string_view flags = "",

                 DataGeneratorOptions opts = {});

  // Resets the Message ID identifier - simulating a "stream reset".

  void ResetStream() { mid_ = MID(0); }

 private:

  MID mid_;

  FSN fsn_ = FSN(0);

};

}  // namespace dcsctp

#endif  // NET_DCSCTP_TESTING_DATA_GENERATOR_H_