1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* Copyright 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.
*/
#include "test/network/cross_traffic.h"
#include <atomic>
#include <memory>
#include <utility>
#include <vector>
#include "absl/memory/memory.h"
#include "absl/types/optional.h"
#include "api/test/network_emulation_manager.h"
#include "api/test/simulated_network.h"
#include "call/simulated_network.h"
#include "rtc_base/event.h"
#include "rtc_base/logging.h"
#include "rtc_base/network_constants.h"
#include "test/gmock.h"
#include "test/gtest.h"
#include "test/network/network_emulation_manager.h"
#include "test/network/traffic_route.h"
#include "test/time_controller/simulated_time_controller.h"
namespace webrtc {
namespace test {
namespace {
constexpr uint32_t kTestIpAddress = 0xC0A80011; // 192.168.0.17
class CountingReceiver : public EmulatedNetworkReceiverInterface {
public:
void OnPacketReceived(EmulatedIpPacket packet) override {
packets_count_++;
total_packets_size_ += packet.size();
}
std::atomic<int> packets_count_{0};
std::atomic<uint64_t> total_packets_size_{0};
};
struct TrafficCounterFixture {
SimulatedClock clock{0};
CountingReceiver counter;
TaskQueueForTest task_queue_;
EmulatedEndpointImpl endpoint{EmulatedEndpointImpl::Options{
/*id=*/1,
rtc::IPAddress(kTestIpAddress),
EmulatedEndpointConfig(),
EmulatedNetworkStatsGatheringMode::kDefault,
},
/*is_enabled=*/true, &task_queue_, &clock};
};
} // namespace
TEST(CrossTrafficTest, TriggerPacketBurst) {
TrafficCounterFixture fixture;
CrossTrafficRouteImpl traffic(&fixture.clock, &fixture.counter,
&fixture.endpoint);
traffic.TriggerPacketBurst(100, 1000);
EXPECT_EQ(fixture.counter.packets_count_, 100);
EXPECT_EQ(fixture.counter.total_packets_size_, 100 * 1000ul);
}
TEST(CrossTrafficTest, PulsedPeaksCrossTraffic) {
TrafficCounterFixture fixture;
CrossTrafficRouteImpl traffic(&fixture.clock, &fixture.counter,
&fixture.endpoint);
PulsedPeaksConfig config;
config.peak_rate = DataRate::KilobitsPerSec(1000);
config.min_packet_size = DataSize::Bytes(1);
config.min_packet_interval = TimeDelta::Millis(25);
config.send_duration = TimeDelta::Millis(500);
config.hold_duration = TimeDelta::Millis(250);
PulsedPeaksCrossTraffic pulsed_peaks(config, &traffic);
const auto kRunTime = TimeDelta::Seconds(1);
while (fixture.clock.TimeInMilliseconds() < kRunTime.ms()) {
pulsed_peaks.Process(Timestamp::Millis(fixture.clock.TimeInMilliseconds()));
fixture.clock.AdvanceTimeMilliseconds(1);
}
RTC_LOG(LS_INFO) << fixture.counter.packets_count_ << " packets; "
<< fixture.counter.total_packets_size_ << " bytes";
// Using 50% duty cycle.
const auto kExpectedDataSent = kRunTime * config.peak_rate * 0.5;
EXPECT_NEAR(fixture.counter.total_packets_size_, kExpectedDataSent.bytes(),
kExpectedDataSent.bytes() * 0.1);
}
TEST(CrossTrafficTest, RandomWalkCrossTraffic) {
TrafficCounterFixture fixture;
CrossTrafficRouteImpl traffic(&fixture.clock, &fixture.counter,
&fixture.endpoint);
RandomWalkConfig config;
config.peak_rate = DataRate::KilobitsPerSec(1000);
config.min_packet_size = DataSize::Bytes(1);
config.min_packet_interval = TimeDelta::Millis(25);
config.update_interval = TimeDelta::Millis(500);
config.variance = 0.0;
config.bias = 1.0;
RandomWalkCrossTraffic random_walk(config, &traffic);
const auto kRunTime = TimeDelta::Seconds(1);
while (fixture.clock.TimeInMilliseconds() < kRunTime.ms()) {
random_walk.Process(Timestamp::Millis(fixture.clock.TimeInMilliseconds()));
fixture.clock.AdvanceTimeMilliseconds(1);
}
RTC_LOG(LS_INFO) << fixture.counter.packets_count_ << " packets; "
<< fixture.counter.total_packets_size_ << " bytes";
// Sending at peak rate since bias = 1.
const auto kExpectedDataSent = kRunTime * config.peak_rate;
EXPECT_NEAR(fixture.counter.total_packets_size_, kExpectedDataSent.bytes(),
kExpectedDataSent.bytes() * 0.1);
}
TEST(TcpMessageRouteTest, DeliveredOnLossyNetwork) {
NetworkEmulationManagerImpl net(TimeMode::kSimulated,
EmulatedNetworkStatsGatheringMode::kDefault);
BuiltInNetworkBehaviorConfig send;
// 800 kbps means that the 100 kB message would be delivered in ca 1 second
// under ideal conditions and no overhead.
send.link_capacity_kbps = 100 * 8;
send.loss_percent = 50;
send.queue_delay_ms = 100;
send.delay_standard_deviation_ms = 20;
send.allow_reordering = true;
auto ret = send;
ret.loss_percent = 10;
auto* tcp_route =
net.CreateTcpRoute(net.CreateRoute({net.CreateEmulatedNode(send)}),
net.CreateRoute({net.CreateEmulatedNode(ret)}));
int deliver_count = 0;
// 100 kB is more than what fits into a single packet.
constexpr size_t kMessageSize = 100000;
tcp_route->SendMessage(kMessageSize, [&] {
RTC_LOG(LS_INFO) << "Received at " << ToString(net.Now());
deliver_count++;
});
// If there was no loss, we would have delivered the message in ca 1 second,
// with 50% it should take much longer.
net.time_controller()->AdvanceTime(TimeDelta::Seconds(5));
ASSERT_EQ(deliver_count, 0);
// But given enough time the messsage will be delivered, but only once.
net.time_controller()->AdvanceTime(TimeDelta::Seconds(60));
EXPECT_EQ(deliver_count, 1);
}
} // namespace test
} // namespace webrtc
|
