1 /*
2 * Copyright 2018 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10 #include "test/scenario/network_node.h"
11
12 #include <algorithm>
13 #include <vector>
14
15 #include <memory>
16 #include "rtc_base/net_helper.h"
17 #include "rtc_base/numerics/safe_minmax.h"
18
19 namespace webrtc {
20 namespace test {
21 namespace {
22 constexpr char kDummyTransportName[] = "dummy";
CreateSimulationConfig(NetworkSimulationConfig config)23 SimulatedNetwork::Config CreateSimulationConfig(
24 NetworkSimulationConfig config) {
25 SimulatedNetwork::Config sim_config;
26 sim_config.link_capacity_kbps = config.bandwidth.kbps_or(0);
27 sim_config.loss_percent = config.loss_rate * 100;
28 sim_config.queue_delay_ms = config.delay.ms();
29 sim_config.delay_standard_deviation_ms = config.delay_std_dev.ms();
30 sim_config.packet_overhead = config.packet_overhead.bytes<int>();
31 sim_config.queue_length_packets =
32 config.packet_queue_length_limit.value_or(0);
33 return sim_config;
34 }
35 } // namespace
36
SimulationNode(NetworkSimulationConfig config,SimulatedNetwork * behavior,EmulatedNetworkNode * network_node)37 SimulationNode::SimulationNode(NetworkSimulationConfig config,
38 SimulatedNetwork* behavior,
39 EmulatedNetworkNode* network_node)
40 : config_(config), simulation_(behavior), network_node_(network_node) {}
41
CreateBehavior(NetworkSimulationConfig config)42 std::unique_ptr<SimulatedNetwork> SimulationNode::CreateBehavior(
43 NetworkSimulationConfig config) {
44 SimulatedNetwork::Config sim_config = CreateSimulationConfig(config);
45 return std::make_unique<SimulatedNetwork>(sim_config);
46 }
47
UpdateConfig(std::function<void (NetworkSimulationConfig *)> modifier)48 void SimulationNode::UpdateConfig(
49 std::function<void(NetworkSimulationConfig*)> modifier) {
50 modifier(&config_);
51 SimulatedNetwork::Config sim_config = CreateSimulationConfig(config_);
52 simulation_->SetConfig(sim_config);
53 }
54
PauseTransmissionUntil(Timestamp until)55 void SimulationNode::PauseTransmissionUntil(Timestamp until) {
56 simulation_->PauseTransmissionUntil(until.us());
57 }
58
ConfigPrinter() const59 ColumnPrinter SimulationNode::ConfigPrinter() const {
60 return ColumnPrinter::Lambda(
61 "propagation_delay capacity loss_rate",
62 [this](rtc::SimpleStringBuilder& sb) {
63 sb.AppendFormat("%.3lf %.0lf %.2lf", config_.delay.seconds<double>(),
64 config_.bandwidth.bps() / 8.0, config_.loss_rate);
65 });
66 }
67
NetworkNodeTransport(Clock * sender_clock,Call * sender_call)68 NetworkNodeTransport::NetworkNodeTransport(Clock* sender_clock,
69 Call* sender_call)
70 : sender_clock_(sender_clock), sender_call_(sender_call) {}
71
72 NetworkNodeTransport::~NetworkNodeTransport() = default;
73
SendRtp(const uint8_t * packet,size_t length,const PacketOptions & options)74 bool NetworkNodeTransport::SendRtp(const uint8_t* packet,
75 size_t length,
76 const PacketOptions& options) {
77 int64_t send_time_ms = sender_clock_->TimeInMilliseconds();
78 rtc::SentPacket sent_packet;
79 sent_packet.packet_id = options.packet_id;
80 sent_packet.info.included_in_feedback = options.included_in_feedback;
81 sent_packet.info.included_in_allocation = options.included_in_allocation;
82 sent_packet.send_time_ms = send_time_ms;
83 sent_packet.info.packet_size_bytes = length;
84 sent_packet.info.packet_type = rtc::PacketType::kData;
85 sender_call_->OnSentPacket(sent_packet);
86
87 MutexLock lock(&mutex_);
88 if (!endpoint_)
89 return false;
90 rtc::CopyOnWriteBuffer buffer(packet, length);
91 endpoint_->SendPacket(local_address_, remote_address_, buffer,
92 packet_overhead_.bytes());
93 return true;
94 }
95
SendRtcp(const uint8_t * packet,size_t length)96 bool NetworkNodeTransport::SendRtcp(const uint8_t* packet, size_t length) {
97 rtc::CopyOnWriteBuffer buffer(packet, length);
98 MutexLock lock(&mutex_);
99 if (!endpoint_)
100 return false;
101 endpoint_->SendPacket(local_address_, remote_address_, buffer,
102 packet_overhead_.bytes());
103 return true;
104 }
105
Connect(EmulatedEndpoint * endpoint,const rtc::SocketAddress & receiver_address,DataSize packet_overhead)106 void NetworkNodeTransport::Connect(EmulatedEndpoint* endpoint,
107 const rtc::SocketAddress& receiver_address,
108 DataSize packet_overhead) {
109 rtc::NetworkRoute route;
110 route.connected = true;
111 // We assume that the address will be unique in the lower bytes.
112 route.local = rtc::RouteEndpoint::CreateWithNetworkId(static_cast<uint16_t>(
113 receiver_address.ipaddr().v4AddressAsHostOrderInteger()));
114 route.remote = rtc::RouteEndpoint::CreateWithNetworkId(static_cast<uint16_t>(
115 receiver_address.ipaddr().v4AddressAsHostOrderInteger()));
116 route.packet_overhead = packet_overhead.bytes() +
117 receiver_address.ipaddr().overhead() +
118 cricket::kUdpHeaderSize;
119 {
120 // Only IPv4 address is supported.
121 RTC_CHECK_EQ(receiver_address.family(), AF_INET);
122 MutexLock lock(&mutex_);
123 endpoint_ = endpoint;
124 local_address_ = rtc::SocketAddress(endpoint_->GetPeerLocalAddress(), 0);
125 remote_address_ = receiver_address;
126 packet_overhead_ = packet_overhead;
127 current_network_route_ = route;
128 }
129
130 sender_call_->GetTransportControllerSend()->OnNetworkRouteChanged(
131 kDummyTransportName, route);
132 }
133
Disconnect()134 void NetworkNodeTransport::Disconnect() {
135 MutexLock lock(&mutex_);
136 current_network_route_.connected = false;
137 sender_call_->GetTransportControllerSend()->OnNetworkRouteChanged(
138 kDummyTransportName, current_network_route_);
139 current_network_route_ = {};
140 endpoint_ = nullptr;
141 }
142
143 } // namespace test
144 } // namespace webrtc
145