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/*
* Copyright (c) 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/emulated_network_manager.h"
#include <functional>
#include <memory>
#include <utility>
#include <vector>
#include "absl/base/nullability.h"
#include "absl/memory/memory.h"
#include "api/sequence_checker.h"
#include "api/task_queue/task_queue_base.h"
#include "api/test/network_emulation/network_emulation_interfaces.h"
#include "api/test/time_controller.h"
#include "rtc_base/checks.h"
#include "rtc_base/network.h"
#include "rtc_base/thread.h"
#include "rtc_base/thread_annotations.h"
#include "test/network/fake_network_socket_server.h"
#include "test/network/network_emulation.h"
namespace webrtc {
namespace test {
// Framework assumes that webrtc::NetworkManager is called from network thread.
class EmulatedNetworkManager::NetworkManagerImpl : public NetworkManagerBase {
public:
explicit NetworkManagerImpl(Thread* absl_nonnull network_thread,
EndpointsContainer* absl_nonnull
endpoints_container)
: network_thread_(network_thread),
endpoints_container_(endpoints_container) {}
void StartUpdating() override;
void StopUpdating() override;
void UpdateNetworksOnce();
void MaybeSignalNetworksChanged();
// We don't support any address interfaces in the network emulation framework.
std::vector<const Network*> GetAnyAddressNetworks() override { return {}; }
private:
Thread* absl_nonnull const network_thread_;
const EndpointsContainer* absl_nonnull const endpoints_container_;
bool sent_first_update_ RTC_GUARDED_BY(network_thread_) = false;
int start_count_ RTC_GUARDED_BY(network_thread_) = 0;
};
EmulatedNetworkManager::EmulatedNetworkManager(
TimeController* time_controller,
TaskQueueBase* task_queue,
EndpointsContainer* endpoints_container)
: task_queue_(task_queue),
endpoints_container_(endpoints_container),
socket_server_(new FakeNetworkSocketServer(endpoints_container)),
network_thread_(
time_controller->CreateThread("net_thread",
absl::WrapUnique(socket_server_))),
network_manager_(
std::make_unique<NetworkManagerImpl>(network_thread_.get(),
endpoints_container)),
network_manager_ptr_(network_manager_.get()) {}
EmulatedNetworkManager::~EmulatedNetworkManager() = default;
absl_nonnull std::unique_ptr<NetworkManager>
EmulatedNetworkManager::ReleaseNetworkManager() {
RTC_CHECK(network_manager_ != nullptr)
<< "ReleaseNetworkManager can be called at most once.";
return std::move(network_manager_);
}
void EmulatedNetworkManager::UpdateNetworks() {
NetworkManagerImpl* absl_nonnull network_manager = network_manager_ptr_;
network_thread_->PostTask(
[network_manager] { network_manager->UpdateNetworksOnce(); });
}
void EmulatedNetworkManager::NetworkManagerImpl::StartUpdating() {
RTC_DCHECK_RUN_ON(network_thread_);
if (start_count_ > 0) {
// If network interfaces are already discovered and signal is sent,
// we should trigger network signal immediately for the new clients
// to start allocating ports.
if (sent_first_update_)
network_thread_->PostTask([this]() { MaybeSignalNetworksChanged(); });
} else {
network_thread_->PostTask([this]() { UpdateNetworksOnce(); });
}
++start_count_;
}
void EmulatedNetworkManager::NetworkManagerImpl::StopUpdating() {
RTC_DCHECK_RUN_ON(network_thread_);
if (start_count_ == 0)
return;
--start_count_;
if (start_count_ == 0) {
sent_first_update_ = false;
}
}
void EmulatedNetworkManager::GetStats(
std::function<void(EmulatedNetworkStats)> stats_callback) const {
task_queue_->PostTask([stats_callback, this]() {
stats_callback(endpoints_container_->GetStats());
});
}
void EmulatedNetworkManager::NetworkManagerImpl::UpdateNetworksOnce() {
RTC_DCHECK_RUN_ON(network_thread_);
std::vector<std::unique_ptr<Network>> networks;
for (std::unique_ptr<Network>& net :
endpoints_container_->GetEnabledNetworks()) {
net->set_default_local_address_provider(this);
networks.push_back(std::move(net));
}
bool changed;
MergeNetworkList(std::move(networks), &changed);
if (changed || !sent_first_update_) {
MaybeSignalNetworksChanged();
sent_first_update_ = true;
}
}
void EmulatedNetworkManager::NetworkManagerImpl::MaybeSignalNetworksChanged() {
RTC_DCHECK_RUN_ON(network_thread_);
// If manager is stopped we don't need to signal anything.
if (start_count_ == 0) {
return;
}
SignalNetworksChanged();
}
} // namespace test
} // namespace webrtc
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