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/*
* Copyright (c) 2019 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 TEST_NETWORK_CROSS_TRAFFIC_H_
#define TEST_NETWORK_CROSS_TRAFFIC_H_
#include <algorithm>
#include <map>
#include <memory>
#include "api/sequence_checker.h"
#include "api/test/network_emulation_manager.h"
#include "api/units/data_rate.h"
#include "api/units/data_size.h"
#include "api/units/time_delta.h"
#include "api/units/timestamp.h"
#include "rtc_base/random.h"
#include "test/network/network_emulation.h"
#include "test/scenario/column_printer.h"
namespace webrtc {
namespace test {
class RandomWalkCrossTraffic final : public CrossTrafficGenerator {
public:
RandomWalkCrossTraffic(RandomWalkConfig config,
CrossTrafficRoute* traffic_route);
~RandomWalkCrossTraffic();
void Process(Timestamp at_time) override;
TimeDelta GetProcessInterval() const override;
DataRate TrafficRate() const;
ColumnPrinter StatsPrinter();
private:
SequenceChecker sequence_checker_;
const RandomWalkConfig config_;
CrossTrafficRoute* const traffic_route_ RTC_PT_GUARDED_BY(sequence_checker_);
webrtc::Random random_ RTC_GUARDED_BY(sequence_checker_);
Timestamp last_process_time_ RTC_GUARDED_BY(sequence_checker_) =
Timestamp::MinusInfinity();
Timestamp last_update_time_ RTC_GUARDED_BY(sequence_checker_) =
Timestamp::MinusInfinity();
Timestamp last_send_time_ RTC_GUARDED_BY(sequence_checker_) =
Timestamp::MinusInfinity();
double intensity_ RTC_GUARDED_BY(sequence_checker_) = 0;
DataSize pending_size_ RTC_GUARDED_BY(sequence_checker_) = DataSize::Zero();
};
class PulsedPeaksCrossTraffic final : public CrossTrafficGenerator {
public:
PulsedPeaksCrossTraffic(PulsedPeaksConfig config,
CrossTrafficRoute* traffic_route);
~PulsedPeaksCrossTraffic();
void Process(Timestamp at_time) override;
TimeDelta GetProcessInterval() const override;
DataRate TrafficRate() const;
ColumnPrinter StatsPrinter();
private:
SequenceChecker sequence_checker_;
const PulsedPeaksConfig config_;
CrossTrafficRoute* const traffic_route_ RTC_PT_GUARDED_BY(sequence_checker_);
Timestamp last_update_time_ RTC_GUARDED_BY(sequence_checker_) =
Timestamp::MinusInfinity();
Timestamp last_send_time_ RTC_GUARDED_BY(sequence_checker_) =
Timestamp::MinusInfinity();
bool sending_ RTC_GUARDED_BY(sequence_checker_) = false;
};
class TcpMessageRouteImpl final : public TcpMessageRoute {
public:
TcpMessageRouteImpl(Clock* clock,
TaskQueueBase* task_queue,
EmulatedRoute* send_route,
EmulatedRoute* ret_route);
// Sends a TCP message of the given `size` over the route, `on_received` is
// called when the message has been delivered. Note that the connection
// parameters are reset iff there's no currently pending message on the route.
void SendMessage(size_t size, std::function<void()> on_received) override;
private:
// Represents a message sent over the route. When all fragments has been
// delivered, the message is considered delivered and the handler is
// triggered. This only happen once.
struct Message {
std::function<void()> handler;
std::set<int> pending_fragment_ids;
};
// Represents a piece of a message that fit into a TCP packet.
struct MessageFragment {
int fragment_id;
size_t size;
};
// Represents a packet sent on the wire.
struct TcpPacket {
int sequence_number;
Timestamp send_time = Timestamp::MinusInfinity();
MessageFragment fragment;
};
void OnRequest(TcpPacket packet_info);
void OnResponse(TcpPacket packet_info, Timestamp at_time);
void HandleLoss(Timestamp at_time);
void SendPackets(Timestamp at_time);
void HandlePacketTimeout(int seq_num, Timestamp at_time);
Clock* const clock_;
TaskQueueBase* const task_queue_;
FakePacketRoute<TcpPacket> request_route_;
FakePacketRoute<TcpPacket> response_route_;
std::deque<MessageFragment> pending_;
std::map<int, TcpPacket> in_flight_;
std::list<Message> messages_;
double cwnd_;
double ssthresh_;
int last_acked_seq_num_ = 0;
int next_sequence_number_ = 0;
int next_fragment_id_ = 0;
Timestamp last_reduction_time_ = Timestamp::MinusInfinity();
TimeDelta last_rtt_ = TimeDelta::Zero();
};
class FakeTcpCrossTraffic
: public TwoWayFakeTrafficRoute<int, int>::TrafficHandlerInterface,
public CrossTrafficGenerator {
public:
FakeTcpCrossTraffic(FakeTcpConfig config,
EmulatedRoute* send_route,
EmulatedRoute* ret_route);
TimeDelta GetProcessInterval() const override;
void Process(Timestamp at_time) override;
void OnRequest(int sequence_number, Timestamp at_time) override;
void OnResponse(int sequence_number, Timestamp at_time) override;
void HandleLoss(Timestamp at_time);
void SendPackets(Timestamp at_time);
private:
const FakeTcpConfig conf_;
TwoWayFakeTrafficRoute<int, int> route_;
std::map<int, Timestamp> in_flight_;
double cwnd_ = 10;
double ssthresh_ = INFINITY;
bool ack_received_ = false;
int last_acked_seq_num_ = 0;
int next_sequence_number_ = 0;
Timestamp last_reduction_time_ = Timestamp::MinusInfinity();
TimeDelta last_rtt_ = TimeDelta::Zero();
DataSize total_sent_ = DataSize::Zero();
};
} // namespace test
} // namespace webrtc
#endif // TEST_NETWORK_CROSS_TRAFFIC_H_
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