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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 API_TEST_NETWORK_EMULATION_CROSS_TRAFFIC_H_
#define API_TEST_NETWORK_EMULATION_CROSS_TRAFFIC_H_
#include <cstddef>
#include <functional>
#include "api/units/data_rate.h"
#include "api/units/data_size.h"
#include "api/units/time_delta.h"
#include "api/units/timestamp.h"
namespace webrtc {
// This API is still in development and can be changed without prior notice.
// Represents the endpoint for cross traffic that is going through the network.
// It can be used to emulate unexpected network load.
class CrossTrafficRoute {
public:
virtual ~CrossTrafficRoute() = default;
// Triggers sending of dummy packets with size `packet_size` bytes.
virtual void TriggerPacketBurst(size_t num_packets, size_t packet_size) = 0;
// Sends a packet over the nodes. The content of the packet is unspecified;
// only the size metter for the emulation purposes.
virtual void SendPacket(size_t packet_size) = 0;
// Sends a packet over the nodes and runs `action` when it has been delivered.
virtual void NetworkDelayedAction(size_t packet_size,
std::function<void()> action) = 0;
};
// Describes a way of generating cross traffic on some route. Used by
// NetworkEmulationManager to produce cross traffic during some period of time.
class CrossTrafficGenerator {
public:
virtual ~CrossTrafficGenerator() = default;
// Time between Process calls.
virtual TimeDelta GetProcessInterval() const = 0;
// Called periodically by NetworkEmulationManager. Generates traffic on the
// route.
virtual void Process(Timestamp at_time) = 0;
};
// Config of a cross traffic generator. Generated traffic rises and falls
// randomly.
struct RandomWalkConfig {
int random_seed = 1;
DataRate peak_rate = DataRate::KilobitsPerSec(100);
DataSize min_packet_size = DataSize::Bytes(200);
TimeDelta min_packet_interval = TimeDelta::Millis(1);
TimeDelta update_interval = TimeDelta::Millis(200);
double variance = 0.6;
double bias = -0.1;
};
// Config of a cross traffic generator. Generated traffic has form of periodic
// peaks alternating with periods of silence.
struct PulsedPeaksConfig {
DataRate peak_rate = DataRate::KilobitsPerSec(100);
DataSize min_packet_size = DataSize::Bytes(200);
TimeDelta min_packet_interval = TimeDelta::Millis(1);
TimeDelta send_duration = TimeDelta::Millis(100);
TimeDelta hold_duration = TimeDelta::Millis(2000);
};
struct FakeTcpConfig {
DataSize packet_size = DataSize::Bytes(1200);
DataSize send_limit = DataSize::PlusInfinity();
TimeDelta process_interval = TimeDelta::Millis(200);
TimeDelta packet_timeout = TimeDelta::Seconds(1);
};
} // namespace webrtc
#endif // API_TEST_NETWORK_EMULATION_CROSS_TRAFFIC_H_
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