blob: be9ca71664235a43437bf9f86f14d20789d7992c [file] [log] [blame]
/*
* Copyright 2018 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/scenario/network_node.h"
#include <algorithm>
#include <vector>
#include "absl/memory/memory.h"
#include "rtc_base/numerics/safe_minmax.h"
namespace webrtc {
namespace test {
namespace {
constexpr char kDummyTransportName[] = "dummy";
SimulatedNetwork::Config CreateSimulationConfig(NetworkNodeConfig config) {
SimulatedNetwork::Config sim_config;
sim_config.link_capacity_kbps = config.simulation.bandwidth.kbps_or(0);
sim_config.loss_percent = config.simulation.loss_rate * 100;
sim_config.queue_delay_ms = config.simulation.delay.ms();
sim_config.delay_standard_deviation_ms = config.simulation.delay_std_dev.ms();
sim_config.packet_overhead = config.packet_overhead.bytes<int>();
sim_config.codel_active_queue_management =
config.simulation.codel_active_queue_management;
return sim_config;
}
} // namespace
void NullReceiver::OnPacketReceived(EmulatedIpPacket packet) {}
ActionReceiver::ActionReceiver(std::function<void()> action)
: action_(action) {}
void ActionReceiver::OnPacketReceived(EmulatedIpPacket packet) {
action_();
}
std::unique_ptr<SimulationNode> SimulationNode::Create(
Clock* clock,
rtc::TaskQueue* task_queue,
NetworkNodeConfig config) {
RTC_DCHECK(config.mode == NetworkNodeConfig::TrafficMode::kSimulation);
SimulatedNetwork::Config sim_config = CreateSimulationConfig(config);
auto network = absl::make_unique<SimulatedNetwork>(sim_config);
SimulatedNetwork* simulation_ptr = network.get();
return std::unique_ptr<SimulationNode>(new SimulationNode(
clock, task_queue, config, std::move(network), simulation_ptr));
}
void SimulationNode::UpdateConfig(
std::function<void(NetworkNodeConfig*)> modifier) {
modifier(&config_);
SimulatedNetwork::Config sim_config = CreateSimulationConfig(config_);
simulated_network_->SetConfig(sim_config);
}
void SimulationNode::PauseTransmissionUntil(Timestamp until) {
simulated_network_->PauseTransmissionUntil(until.us());
}
ColumnPrinter SimulationNode::ConfigPrinter() const {
return ColumnPrinter::Lambda("propagation_delay capacity loss_rate",
[this](rtc::SimpleStringBuilder& sb) {
sb.AppendFormat(
"%.3lf %.0lf %.2lf",
config_.simulation.delay.seconds<double>(),
config_.simulation.bandwidth.bps() / 8.0,
config_.simulation.loss_rate);
});
}
SimulationNode::SimulationNode(
Clock* clock,
rtc::TaskQueue* task_queue,
NetworkNodeConfig config,
std::unique_ptr<NetworkBehaviorInterface> behavior,
SimulatedNetwork* simulation)
: EmulatedNetworkNode(clock, task_queue, std::move(behavior)),
simulated_network_(simulation),
config_(config) {}
NetworkNodeTransport::NetworkNodeTransport(Clock* sender_clock,
Call* sender_call)
: sender_clock_(sender_clock), sender_call_(sender_call) {}
NetworkNodeTransport::~NetworkNodeTransport() = default;
bool NetworkNodeTransport::SendRtp(const uint8_t* packet,
size_t length,
const PacketOptions& options) {
int64_t send_time_ms = sender_clock_->TimeInMilliseconds();
rtc::SentPacket sent_packet;
sent_packet.packet_id = options.packet_id;
sent_packet.info.included_in_feedback = options.included_in_feedback;
sent_packet.info.included_in_allocation = options.included_in_allocation;
sent_packet.send_time_ms = send_time_ms;
sent_packet.info.packet_size_bytes = length;
sent_packet.info.packet_type = rtc::PacketType::kData;
sender_call_->OnSentPacket(sent_packet);
Timestamp send_time = Timestamp::ms(send_time_ms);
rtc::CritScope crit(&crit_sect_);
if (!send_net_)
return false;
rtc::CopyOnWriteBuffer buffer(packet, length,
length + packet_overhead_.bytes());
buffer.SetSize(length + packet_overhead_.bytes());
send_net_->OnPacketReceived(
EmulatedIpPacket(local_address_, receiver_address_, buffer, send_time));
return true;
}
bool NetworkNodeTransport::SendRtcp(const uint8_t* packet, size_t length) {
rtc::CopyOnWriteBuffer buffer(packet, length);
Timestamp send_time = Timestamp::ms(sender_clock_->TimeInMilliseconds());
rtc::CritScope crit(&crit_sect_);
buffer.SetSize(length + packet_overhead_.bytes());
if (!send_net_)
return false;
send_net_->OnPacketReceived(
EmulatedIpPacket(local_address_, receiver_address_, buffer, send_time));
return true;
}
void NetworkNodeTransport::Connect(EmulatedNetworkNode* send_node,
rtc::IPAddress receiver_ip,
DataSize packet_overhead) {
rtc::NetworkRoute route;
route.connected = true;
route.local_network_id =
static_cast<uint16_t>(receiver_ip.v4AddressAsHostOrderInteger());
route.remote_network_id =
static_cast<uint16_t>(receiver_ip.v4AddressAsHostOrderInteger());
{
// Only IPv4 address is supported. We don't use full range of IPs in
// scenario framework and also we need a simple way to convert IP into
// network_id to signal network route.
RTC_CHECK_EQ(receiver_ip.family(), AF_INET);
RTC_CHECK_LE(receiver_ip.v4AddressAsHostOrderInteger(),
std::numeric_limits<uint16_t>::max());
rtc::CritScope crit(&crit_sect_);
send_net_ = send_node;
receiver_address_ = rtc::SocketAddress(receiver_ip, 0);
packet_overhead_ = packet_overhead;
current_network_route_ = route;
}
sender_call_->GetTransportControllerSend()->OnNetworkRouteChanged(
kDummyTransportName, route);
}
void NetworkNodeTransport::Disconnect() {
rtc::CritScope crit(&crit_sect_);
current_network_route_.connected = false;
sender_call_->GetTransportControllerSend()->OnNetworkRouteChanged(
kDummyTransportName, current_network_route_);
current_network_route_ = {};
send_net_ = nullptr;
}
CrossTrafficSource::CrossTrafficSource(EmulatedNetworkReceiverInterface* target,
rtc::IPAddress receiver_ip,
CrossTrafficConfig config)
: target_(target),
receiver_address_(receiver_ip, 0),
config_(config),
random_(config.random_seed) {}
CrossTrafficSource::~CrossTrafficSource() = default;
DataRate CrossTrafficSource::TrafficRate() const {
return config_.peak_rate * intensity_;
}
void CrossTrafficSource::Process(Timestamp at_time, TimeDelta delta) {
time_since_update_ += delta;
if (config_.mode == CrossTrafficConfig::Mode::kRandomWalk) {
if (time_since_update_ >= config_.random_walk.update_interval) {
intensity_ += random_.Gaussian(config_.random_walk.bias,
config_.random_walk.variance) *
time_since_update_.seconds<double>();
intensity_ = rtc::SafeClamp(intensity_, 0.0, 1.0);
time_since_update_ = TimeDelta::Zero();
}
} else if (config_.mode == CrossTrafficConfig::Mode::kPulsedPeaks) {
if (intensity_ == 0 && time_since_update_ >= config_.pulsed.hold_duration) {
intensity_ = 1;
time_since_update_ = TimeDelta::Zero();
} else if (intensity_ == 1 &&
time_since_update_ >= config_.pulsed.send_duration) {
intensity_ = 0;
time_since_update_ = TimeDelta::Zero();
}
}
pending_size_ += TrafficRate() * delta;
if (pending_size_ > config_.min_packet_size) {
target_->OnPacketReceived(EmulatedIpPacket(
/*from=*/rtc::SocketAddress(), receiver_address_,
rtc::CopyOnWriteBuffer(pending_size_.bytes()), at_time));
pending_size_ = DataSize::Zero();
}
}
ColumnPrinter CrossTrafficSource::StatsPrinter() {
return ColumnPrinter::Lambda("cross_traffic_rate",
[this](rtc::SimpleStringBuilder& sb) {
sb.AppendFormat("%.0lf",
TrafficRate().bps() / 8.0);
},
32);
}
} // namespace test
} // namespace webrtc