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/*
* 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 <cstdint>
#include <functional>
#include <memory>
#include <utility>
#include "absl/cleanup/cleanup.h"
#include "api/array_view.h"
#include "api/call/transport.h"
#include "api/sequence_checker.h"
#include "api/test/network_emulation/network_emulation_interfaces.h"
#include "api/units/data_size.h"
#include "api/units/time_delta.h"
#include "api/units/timestamp.h"
#include "call/call.h"
#include "rtc_base/checks.h"
#include "rtc_base/copy_on_write_buffer.h"
#include "rtc_base/event.h"
#include "rtc_base/net_helper.h"
#include "rtc_base/net_helpers.h"
#include "rtc_base/network/sent_packet.h"
#include "rtc_base/network_constants.h"
#include "rtc_base/network_route.h"
#include "rtc_base/socket_address.h"
#include "rtc_base/strings/string_builder.h"
#include "rtc_base/synchronization/mutex.h"
#include "system_wrappers/include/clock.h"
#include "test/network/network_emulation.h"
#include "test/network/simulated_network.h"
#include "test/scenario/column_printer.h"
#include "test/scenario/scenario_config.h"
namespace webrtc {
namespace test {
namespace {
constexpr char kDummyTransportName[] = "dummy";
SimulatedNetwork::Config CreateSimulationConfig(
NetworkSimulationConfig config) {
SimulatedNetwork::Config sim_config;
sim_config.link_capacity = config.bandwidth;
sim_config.loss_percent = config.loss_rate * 100;
sim_config.queue_delay_ms = config.delay.ms();
sim_config.delay_standard_deviation_ms = config.delay_std_dev.ms();
sim_config.packet_overhead = config.packet_overhead.bytes<int>();
sim_config.queue_length_packets =
config.packet_queue_length_limit.value_or(0);
return sim_config;
}
RouteEndpoint CreateRouteEndpoint(uint16_t network_id, uint16_t adapter_id) {
return RouteEndpoint(ADAPTER_TYPE_UNKNOWN, adapter_id, network_id,
/* uses_turn = */ false);
}
} // namespace
SimulationNode::SimulationNode(NetworkSimulationConfig config,
SimulatedNetwork* behavior,
EmulatedNetworkNode* network_node)
: config_(config), simulation_(behavior), network_node_(network_node) {}
std::unique_ptr<SimulatedNetwork> SimulationNode::CreateBehavior(
NetworkSimulationConfig config) {
SimulatedNetwork::Config sim_config = CreateSimulationConfig(config);
return std::make_unique<SimulatedNetwork>(sim_config);
}
void SimulationNode::UpdateConfig(
std::function<void(NetworkSimulationConfig*)> modifier) {
modifier(&config_);
SimulatedNetwork::Config sim_config = CreateSimulationConfig(config_);
simulation_->SetConfig(sim_config);
}
void SimulationNode::PauseTransmissionUntil(Timestamp until) {
simulation_->PauseTransmissionUntil(until.us());
}
ColumnPrinter SimulationNode::ConfigPrinter() const {
return ColumnPrinter::Lambda(
"propagation_delay capacity loss_rate", [this](SimpleStringBuilder& sb) {
sb.AppendFormat("%.3lf %.0lf %.2lf", config_.delay.seconds<double>(),
config_.bandwidth.bps() / 8.0, config_.loss_rate);
});
}
NetworkNodeTransport::NetworkNodeTransport(Clock* sender_clock,
Call* sender_call)
: sender_clock_(sender_clock), sender_call_(sender_call) {
sequence_checker_.Detach();
}
NetworkNodeTransport::~NetworkNodeTransport() = default;
bool NetworkNodeTransport::SendRtp(ArrayView<const uint8_t> packet,
const PacketOptions& options) {
int64_t send_time_ms = sender_clock_->TimeInMilliseconds();
SentPacketInfo 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 = packet.size();
sent_packet.info.packet_type = PacketType::kData;
sender_call_->OnSentPacket(sent_packet);
MutexLock lock(&mutex_);
if (!endpoint_)
return false;
CopyOnWriteBuffer buffer(packet);
endpoint_->SendPacket(local_address_, remote_address_, buffer,
packet_overhead_.bytes());
return true;
}
bool NetworkNodeTransport::SendRtcp(ArrayView<const uint8_t> packet,
const PacketOptions& options) {
CopyOnWriteBuffer buffer(packet);
MutexLock lock(&mutex_);
if (!endpoint_)
return false;
endpoint_->SendPacket(local_address_, remote_address_, buffer,
packet_overhead_.bytes());
return true;
}
void NetworkNodeTransport::UpdateAdapterId(int adapter_id) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
adapter_id_ = adapter_id;
}
void NetworkNodeTransport::Connect(EmulatedEndpoint* endpoint,
const SocketAddress& receiver_address,
DataSize packet_overhead) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
NetworkRoute route;
route.connected = true;
// We assume that the address will be unique in the lower bytes.
route.local = CreateRouteEndpoint(
static_cast<uint16_t>(
receiver_address.ipaddr().v4AddressAsHostOrderInteger()),
adapter_id_);
route.remote = CreateRouteEndpoint(
static_cast<uint16_t>(
receiver_address.ipaddr().v4AddressAsHostOrderInteger()),
adapter_id_);
route.packet_overhead = packet_overhead.bytes() +
receiver_address.ipaddr().overhead() + kUdpHeaderSize;
{
// Only IPv4 address is supported.
RTC_CHECK_EQ(receiver_address.family(), AF_INET);
MutexLock lock(&mutex_);
endpoint_ = endpoint;
local_address_ = SocketAddress(endpoint_->GetPeerLocalAddress(), 0);
remote_address_ = receiver_address;
packet_overhead_ = packet_overhead;
current_network_route_ = route;
}
// Must be called from the worker thread.
Event event;
auto cleanup = absl::MakeCleanup([&event] { event.Set(); });
auto&& task = [this, &route, cleanup = std::move(cleanup)] {
sender_call_->GetTransportControllerSend()->OnNetworkRouteChanged(
kDummyTransportName, route);
};
if (!sender_call_->worker_thread()->IsCurrent()) {
sender_call_->worker_thread()->PostTask(std::move(task));
} else {
std::move(task)();
}
event.Wait(TimeDelta::Seconds(1));
}
void NetworkNodeTransport::Disconnect() {
MutexLock lock(&mutex_);
current_network_route_.connected = false;
sender_call_->GetTransportControllerSend()->OnNetworkRouteChanged(
kDummyTransportName, current_network_route_);
current_network_route_ = {};
endpoint_ = nullptr;
}
} // namespace test
} // namespace webrtc
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