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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/traffic_route.h"
#include <algorithm>
#include <cstddef>
#include <cstdint>
#include <functional>
#include <memory>
#include <optional>
#include <utility>
#include "api/test/network_emulation/network_emulation_interfaces.h"
#include "rtc_base/checks.h"
#include "rtc_base/copy_on_write_buffer.h"
#include "rtc_base/socket_address.h"
#include "system_wrappers/include/clock.h"
#include "test/network/network_emulation.h"
namespace webrtc {
namespace test {
namespace {
class NullReceiver : public EmulatedNetworkReceiverInterface {
public:
void OnPacketReceived(EmulatedIpPacket packet) override {}
};
class ActionReceiver : public EmulatedNetworkReceiverInterface {
public:
explicit ActionReceiver(std::function<void()> action) : action_(action) {}
~ActionReceiver() override = default;
void OnPacketReceived(EmulatedIpPacket packet) override { action_(); }
private:
std::function<void()> action_;
};
} // namespace
CrossTrafficRouteImpl::CrossTrafficRouteImpl(
Clock* clock,
EmulatedNetworkReceiverInterface* receiver,
EmulatedEndpointImpl* endpoint)
: clock_(clock), receiver_(receiver), endpoint_(endpoint) {
null_receiver_ = std::make_unique<NullReceiver>();
std::optional<uint16_t> port =
endpoint_->BindReceiver(0, null_receiver_.get());
RTC_DCHECK(port);
null_receiver_port_ = port.value();
}
CrossTrafficRouteImpl::~CrossTrafficRouteImpl() = default;
void CrossTrafficRouteImpl::TriggerPacketBurst(size_t num_packets,
size_t packet_size) {
for (size_t i = 0; i < num_packets; ++i) {
SendPacket(packet_size);
}
}
void CrossTrafficRouteImpl::NetworkDelayedAction(size_t packet_size,
std::function<void()> action) {
auto action_receiver = std::make_unique<ActionReceiver>(action);
// BindOneShotReceiver arranges to free the port in the endpoint after the
// action is done.
std::optional<uint16_t> port =
endpoint_->BindOneShotReceiver(0, action_receiver.get());
RTC_DCHECK(port);
actions_.push_back(std::move(action_receiver));
SendPacket(packet_size, port.value());
}
void CrossTrafficRouteImpl::SendPacket(size_t packet_size) {
SendPacket(packet_size, null_receiver_port_);
}
void CrossTrafficRouteImpl::SendPacket(size_t packet_size, uint16_t dest_port) {
CopyOnWriteBuffer data(packet_size);
std::fill_n(data.MutableData(), data.size(), 0);
receiver_->OnPacketReceived(EmulatedIpPacket(
/*from=*/SocketAddress(),
SocketAddress(endpoint_->GetPeerLocalAddress(), dest_port), data,
clock_->CurrentTime()));
}
} // namespace test
} // namespace webrtc
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