mirror of
https://github.com/mollyim/webrtc.git
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b64d65e67b
Account for time measurement variability. Bug: webrtc:10553 Change-Id: I7a82a15d5a7c2fb3e5cb80bfdf140433a3b93349 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/151780 Commit-Queue: Yves Gerey <yvesg@google.com> Reviewed-by: Artem Titov <titovartem@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29101}
379 lines
14 KiB
C++
379 lines
14 KiB
C++
/*
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* Copyright 2019 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "test/network/network_emulation.h"
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#include <atomic>
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#include <memory>
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#include <set>
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#include "absl/memory/memory.h"
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#include "api/test/simulated_network.h"
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#include "api/units/time_delta.h"
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#include "call/simulated_network.h"
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#include "rtc_base/event.h"
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#include "rtc_base/gunit.h"
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#include "system_wrappers/include/sleep.h"
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#include "test/gmock.h"
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#include "test/gtest.h"
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#include "test/network/network_emulation_manager.h"
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namespace webrtc {
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namespace test {
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namespace {
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constexpr int kNetworkPacketWaitTimeoutMs = 100;
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constexpr int kStatsWaitTimeoutMs = 1000;
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class SocketReader : public sigslot::has_slots<> {
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public:
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explicit SocketReader(rtc::AsyncSocket* socket, rtc::Thread* network_thread)
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: socket_(socket), network_thread_(network_thread) {
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socket_->SignalReadEvent.connect(this, &SocketReader::OnReadEvent);
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size_ = 128 * 1024;
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buf_ = new char[size_];
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}
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~SocketReader() override { delete[] buf_; }
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void OnReadEvent(rtc::AsyncSocket* socket) {
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RTC_DCHECK(socket_ == socket);
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network_thread_->PostTask(RTC_FROM_HERE, [this]() {
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int64_t timestamp;
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len_ = socket_->Recv(buf_, size_, ×tamp);
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rtc::CritScope crit(&lock_);
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received_count_++;
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});
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}
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int ReceivedCount() {
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rtc::CritScope crit(&lock_);
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return received_count_;
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}
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private:
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rtc::AsyncSocket* const socket_;
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rtc::Thread* const network_thread_;
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char* buf_;
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size_t size_;
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int len_;
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rtc::CriticalSection lock_;
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int received_count_ RTC_GUARDED_BY(lock_) = 0;
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};
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class MockReceiver : public EmulatedNetworkReceiverInterface {
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public:
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MOCK_METHOD1(OnPacketReceived, void(EmulatedIpPacket packet));
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};
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class NetworkEmulationManagerThreeNodesRoutingTest : public ::testing::Test {
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public:
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NetworkEmulationManagerThreeNodesRoutingTest() {
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e1_ = emulation_.CreateEndpoint(EmulatedEndpointConfig());
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e2_ = emulation_.CreateEndpoint(EmulatedEndpointConfig());
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e3_ = emulation_.CreateEndpoint(EmulatedEndpointConfig());
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}
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void SetupRouting(
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std::function<void(EmulatedEndpoint*,
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EmulatedEndpoint*,
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EmulatedEndpoint*,
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NetworkEmulationManager*)> create_routing_func) {
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create_routing_func(e1_, e2_, e3_, &emulation_);
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}
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void SendPacketsAndValidateDelivery() {
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EXPECT_CALL(r_e1_e2_, OnPacketReceived(::testing::_)).Times(1);
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EXPECT_CALL(r_e2_e1_, OnPacketReceived(::testing::_)).Times(1);
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EXPECT_CALL(r_e1_e3_, OnPacketReceived(::testing::_)).Times(1);
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EXPECT_CALL(r_e3_e1_, OnPacketReceived(::testing::_)).Times(1);
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uint16_t common_send_port = 80;
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uint16_t r_e1_e2_port = e2_->BindReceiver(0, &r_e1_e2_).value();
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uint16_t r_e2_e1_port = e1_->BindReceiver(0, &r_e2_e1_).value();
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uint16_t r_e1_e3_port = e3_->BindReceiver(0, &r_e1_e3_).value();
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uint16_t r_e3_e1_port = e1_->BindReceiver(0, &r_e3_e1_).value();
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// Next code is using API of EmulatedEndpoint, that is visible only for
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// internals of network emulation layer. Don't use this API in other tests.
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// Send packet from e1 to e2.
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e1_->SendPacket(
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rtc::SocketAddress(e1_->GetPeerLocalAddress(), common_send_port),
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rtc::SocketAddress(e2_->GetPeerLocalAddress(), r_e1_e2_port),
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rtc::CopyOnWriteBuffer(10));
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// Send packet from e2 to e1.
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e2_->SendPacket(
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rtc::SocketAddress(e2_->GetPeerLocalAddress(), common_send_port),
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rtc::SocketAddress(e1_->GetPeerLocalAddress(), r_e2_e1_port),
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rtc::CopyOnWriteBuffer(10));
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// Send packet from e1 to e3.
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e1_->SendPacket(
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rtc::SocketAddress(e1_->GetPeerLocalAddress(), common_send_port),
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rtc::SocketAddress(e3_->GetPeerLocalAddress(), r_e1_e3_port),
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rtc::CopyOnWriteBuffer(10));
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// Send packet from e3 to e1.
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e3_->SendPacket(
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rtc::SocketAddress(e3_->GetPeerLocalAddress(), common_send_port),
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rtc::SocketAddress(e1_->GetPeerLocalAddress(), r_e3_e1_port),
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rtc::CopyOnWriteBuffer(10));
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// Sleep at the end to wait for async packets delivery.
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SleepMs(kNetworkPacketWaitTimeoutMs);
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}
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private:
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// Receivers: r_<source endpoint>_<destination endpoint>
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// They must be destroyed after emulation, so they should be declared before.
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MockReceiver r_e1_e2_;
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MockReceiver r_e2_e1_;
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MockReceiver r_e1_e3_;
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MockReceiver r_e3_e1_;
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NetworkEmulationManagerImpl emulation_;
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EmulatedEndpoint* e1_;
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EmulatedEndpoint* e2_;
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EmulatedEndpoint* e3_;
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};
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EmulatedNetworkNode* CreateEmulatedNodeWithDefaultBuiltInConfig(
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NetworkEmulationManager* emulation) {
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return emulation->CreateEmulatedNode(
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absl::make_unique<SimulatedNetwork>(BuiltInNetworkBehaviorConfig()));
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}
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} // namespace
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using ::testing::_;
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TEST(NetworkEmulationManagerTest, GeneratedIpv4AddressDoesNotCollide) {
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NetworkEmulationManagerImpl network_manager;
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std::set<rtc::IPAddress> ips;
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EmulatedEndpointConfig config;
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config.generated_ip_family = EmulatedEndpointConfig::IpAddressFamily::kIpv4;
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for (int i = 0; i < 1000; i++) {
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EmulatedEndpoint* endpoint = network_manager.CreateEndpoint(config);
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ASSERT_EQ(endpoint->GetPeerLocalAddress().family(), AF_INET);
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bool result = ips.insert(endpoint->GetPeerLocalAddress()).second;
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ASSERT_TRUE(result);
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}
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}
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TEST(NetworkEmulationManagerTest, GeneratedIpv6AddressDoesNotCollide) {
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NetworkEmulationManagerImpl network_manager;
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std::set<rtc::IPAddress> ips;
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EmulatedEndpointConfig config;
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config.generated_ip_family = EmulatedEndpointConfig::IpAddressFamily::kIpv6;
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for (int i = 0; i < 1000; i++) {
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EmulatedEndpoint* endpoint = network_manager.CreateEndpoint(config);
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ASSERT_EQ(endpoint->GetPeerLocalAddress().family(), AF_INET6);
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bool result = ips.insert(endpoint->GetPeerLocalAddress()).second;
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ASSERT_TRUE(result);
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}
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}
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TEST(NetworkEmulationManagerTest, Run) {
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NetworkEmulationManagerImpl network_manager;
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EmulatedNetworkNode* alice_node = network_manager.CreateEmulatedNode(
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absl::make_unique<SimulatedNetwork>(BuiltInNetworkBehaviorConfig()));
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EmulatedNetworkNode* bob_node = network_manager.CreateEmulatedNode(
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absl::make_unique<SimulatedNetwork>(BuiltInNetworkBehaviorConfig()));
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EmulatedEndpoint* alice_endpoint =
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network_manager.CreateEndpoint(EmulatedEndpointConfig());
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EmulatedEndpoint* bob_endpoint =
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network_manager.CreateEndpoint(EmulatedEndpointConfig());
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network_manager.CreateRoute(alice_endpoint, {alice_node}, bob_endpoint);
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network_manager.CreateRoute(bob_endpoint, {bob_node}, alice_endpoint);
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EmulatedNetworkManagerInterface* nt1 =
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network_manager.CreateEmulatedNetworkManagerInterface({alice_endpoint});
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EmulatedNetworkManagerInterface* nt2 =
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network_manager.CreateEmulatedNetworkManagerInterface({bob_endpoint});
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rtc::CopyOnWriteBuffer data("Hello");
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for (uint64_t j = 0; j < 2; j++) {
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auto* s1 = nt1->network_thread()->socketserver()->CreateAsyncSocket(
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AF_INET, SOCK_DGRAM);
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auto* s2 = nt2->network_thread()->socketserver()->CreateAsyncSocket(
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AF_INET, SOCK_DGRAM);
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SocketReader r1(s1, nt1->network_thread());
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SocketReader r2(s2, nt2->network_thread());
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rtc::SocketAddress a1(alice_endpoint->GetPeerLocalAddress(), 0);
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rtc::SocketAddress a2(bob_endpoint->GetPeerLocalAddress(), 0);
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s1->Bind(a1);
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s2->Bind(a2);
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s1->Connect(s2->GetLocalAddress());
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s2->Connect(s1->GetLocalAddress());
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for (uint64_t i = 0; i < 1000; i++) {
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nt1->network_thread()->PostTask(
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RTC_FROM_HERE, [&]() { s1->Send(data.data(), data.size()); });
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nt2->network_thread()->PostTask(
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RTC_FROM_HERE, [&]() { s2->Send(data.data(), data.size()); });
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}
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rtc::Event wait;
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wait.Wait(1000);
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EXPECT_EQ(r1.ReceivedCount(), 1000);
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EXPECT_EQ(r2.ReceivedCount(), 1000);
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delete s1;
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delete s2;
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}
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int64_t single_packet_size = data.size();
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std::atomic<int> received_stats_count{0};
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nt1->GetStats([&](EmulatedNetworkStats st) {
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EXPECT_EQ(st.packets_sent, 2000l);
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EXPECT_EQ(st.bytes_sent.bytes(), single_packet_size * 2000l);
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EXPECT_EQ(st.packets_received, 2000l);
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EXPECT_EQ(st.bytes_received.bytes(), single_packet_size * 2000l);
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EXPECT_EQ(st.packets_dropped, 0l);
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EXPECT_EQ(st.bytes_dropped.bytes(), 0l);
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received_stats_count++;
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});
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nt2->GetStats([&](EmulatedNetworkStats st) {
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EXPECT_EQ(st.packets_sent, 2000l);
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EXPECT_EQ(st.bytes_sent.bytes(), single_packet_size * 2000l);
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EXPECT_EQ(st.packets_received, 2000l);
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EXPECT_EQ(st.bytes_received.bytes(), single_packet_size * 2000l);
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EXPECT_EQ(st.packets_dropped, 0l);
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EXPECT_EQ(st.bytes_dropped.bytes(), 0l);
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received_stats_count++;
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});
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ASSERT_EQ_WAIT(received_stats_count.load(), 2, kStatsWaitTimeoutMs);
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}
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TEST(NetworkEmulationManagerTest, ThroughputStats) {
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NetworkEmulationManagerImpl network_manager;
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EmulatedNetworkNode* alice_node = network_manager.CreateEmulatedNode(
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absl::make_unique<SimulatedNetwork>(BuiltInNetworkBehaviorConfig()));
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EmulatedNetworkNode* bob_node = network_manager.CreateEmulatedNode(
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absl::make_unique<SimulatedNetwork>(BuiltInNetworkBehaviorConfig()));
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EmulatedEndpoint* alice_endpoint =
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network_manager.CreateEndpoint(EmulatedEndpointConfig());
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EmulatedEndpoint* bob_endpoint =
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network_manager.CreateEndpoint(EmulatedEndpointConfig());
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network_manager.CreateRoute(alice_endpoint, {alice_node}, bob_endpoint);
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network_manager.CreateRoute(bob_endpoint, {bob_node}, alice_endpoint);
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EmulatedNetworkManagerInterface* nt1 =
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network_manager.CreateEmulatedNetworkManagerInterface({alice_endpoint});
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EmulatedNetworkManagerInterface* nt2 =
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network_manager.CreateEmulatedNetworkManagerInterface({bob_endpoint});
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int64_t single_packet_size = 100;
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rtc::CopyOnWriteBuffer data(single_packet_size);
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auto* s1 = nt1->network_thread()->socketserver()->CreateAsyncSocket(
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AF_INET, SOCK_DGRAM);
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auto* s2 = nt2->network_thread()->socketserver()->CreateAsyncSocket(
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AF_INET, SOCK_DGRAM);
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SocketReader r1(s1, nt1->network_thread());
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SocketReader r2(s2, nt2->network_thread());
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rtc::SocketAddress a1(alice_endpoint->GetPeerLocalAddress(), 0);
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rtc::SocketAddress a2(bob_endpoint->GetPeerLocalAddress(), 0);
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s1->Bind(a1);
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s2->Bind(a2);
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s1->Connect(s2->GetLocalAddress());
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s2->Connect(s1->GetLocalAddress());
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// Send 11 packets, totalizing 1 second between the first and the last.
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const int kNumPacketsSent = 11;
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const int kDelayMs = 100;
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rtc::Event wait;
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for (int i = 0; i < kNumPacketsSent; i++) {
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nt1->network_thread()->PostTask(
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RTC_FROM_HERE, [&]() { s1->Send(data.data(), data.size()); });
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nt2->network_thread()->PostTask(
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RTC_FROM_HERE, [&]() { s2->Send(data.data(), data.size()); });
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wait.Wait(kDelayMs);
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}
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std::atomic<int> received_stats_count{0};
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nt1->GetStats([&](EmulatedNetworkStats st) {
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EXPECT_EQ(st.packets_sent, kNumPacketsSent);
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EXPECT_EQ(st.bytes_sent.bytes(), single_packet_size * kNumPacketsSent);
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const double tolerance = 0.99; // Accept 1% tolerance for timing.
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EXPECT_GE(st.last_packet_sent_time - st.first_packet_sent_time,
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TimeDelta::ms((kNumPacketsSent - 1) * kDelayMs * tolerance));
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EXPECT_GT(st.AverageSendRate().bps(), 0);
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received_stats_count++;
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});
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ASSERT_EQ_WAIT(received_stats_count.load(), 1, kStatsWaitTimeoutMs);
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EXPECT_EQ(r1.ReceivedCount(), 11);
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EXPECT_EQ(r2.ReceivedCount(), 11);
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delete s1;
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delete s2;
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}
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// Testing that packets are delivered via all routes using a routing scheme as
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// follows:
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// * e1 -> n1 -> e2
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// * e2 -> n2 -> e1
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// * e1 -> n3 -> e3
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// * e3 -> n4 -> e1
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TEST_F(NetworkEmulationManagerThreeNodesRoutingTest,
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PacketsAreDeliveredInBothWaysWhenConnectedToTwoPeers) {
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SetupRouting([](EmulatedEndpoint* e1, EmulatedEndpoint* e2,
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EmulatedEndpoint* e3, NetworkEmulationManager* emulation) {
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auto* node1 = CreateEmulatedNodeWithDefaultBuiltInConfig(emulation);
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auto* node2 = CreateEmulatedNodeWithDefaultBuiltInConfig(emulation);
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auto* node3 = CreateEmulatedNodeWithDefaultBuiltInConfig(emulation);
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auto* node4 = CreateEmulatedNodeWithDefaultBuiltInConfig(emulation);
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emulation->CreateRoute(e1, {node1}, e2);
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emulation->CreateRoute(e2, {node2}, e1);
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emulation->CreateRoute(e1, {node3}, e3);
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emulation->CreateRoute(e3, {node4}, e1);
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});
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SendPacketsAndValidateDelivery();
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}
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// Testing that packets are delivered via all routes using a routing scheme as
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// follows:
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// * e1 -> n1 -> e2
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// * e2 -> n2 -> e1
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// * e1 -> n1 -> e3
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// * e3 -> n4 -> e1
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TEST_F(NetworkEmulationManagerThreeNodesRoutingTest,
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PacketsAreDeliveredInBothWaysWhenConnectedToTwoPeersOverSameSendLink) {
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SetupRouting([](EmulatedEndpoint* e1, EmulatedEndpoint* e2,
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EmulatedEndpoint* e3, NetworkEmulationManager* emulation) {
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auto* node1 = CreateEmulatedNodeWithDefaultBuiltInConfig(emulation);
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auto* node2 = CreateEmulatedNodeWithDefaultBuiltInConfig(emulation);
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auto* node3 = CreateEmulatedNodeWithDefaultBuiltInConfig(emulation);
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emulation->CreateRoute(e1, {node1}, e2);
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emulation->CreateRoute(e2, {node2}, e1);
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emulation->CreateRoute(e1, {node1}, e3);
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emulation->CreateRoute(e3, {node3}, e1);
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});
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SendPacketsAndValidateDelivery();
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}
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} // namespace test
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} // namespace webrtc
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