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/*
* Copyright 2004 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.
*/
#ifndef RTC_BASE_TEST_ECHO_SERVER_H_
#define RTC_BASE_TEST_ECHO_SERVER_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <set>
#include <utility>
#include "absl/memory/memory.h"
#include "api/environment/environment.h"
#include "rtc_base/async_packet_socket.h"
#include "rtc_base/async_tcp_socket.h"
#include "rtc_base/checks.h"
#include "rtc_base/memory/less_unique_ptr.h"
#include "rtc_base/network/received_packet.h"
#include "rtc_base/socket.h"
#include "rtc_base/socket_address.h"
#include "rtc_base/third_party/sigslot/sigslot.h"
#include "rtc_base/thread.h"
namespace webrtc {
// A test echo server, echoes back any packets sent to it.
// Useful for unit tests.
class TestEchoServer : public sigslot::has_slots<> {
public:
TestEchoServer(const Environment& env,
Thread* thread,
const SocketAddress& addr);
~TestEchoServer() override;
TestEchoServer(const TestEchoServer&) = delete;
TestEchoServer& operator=(const TestEchoServer&) = delete;
SocketAddress address() const { return server_socket_->GetLocalAddress(); }
private:
void OnAccept(Socket* socket) {
std::unique_ptr<Socket> raw_socket =
absl::WrapUnique(socket->Accept(nullptr));
if (raw_socket) {
auto packet_socket =
std::make_unique<AsyncTCPSocket>(env_, std::move(raw_socket));
packet_socket->RegisterReceivedPacketCallback(
[&](AsyncPacketSocket* socket, const ReceivedIpPacket& packet) {
OnPacket(socket, packet);
});
packet_socket->SubscribeCloseEvent(
this, [this](AsyncPacketSocket* s, int err) { OnClose(s, err); });
client_sockets_.insert(std::move(packet_socket));
}
}
void OnPacket(AsyncPacketSocket* socket, const ReceivedIpPacket& packet) {
AsyncSocketPacketOptions options;
socket->Send(packet.payload().data(), packet.payload().size(), options);
}
void OnClose(AsyncPacketSocket* socket, int err) {
// Use `find` instead of `extract` directly because `find` allows
// heterogeneous lookup while `extract` requires key (i.e., unique_ptr) as
// the input parameter until c++23.
auto iter = client_sockets_.find(socket);
RTC_CHECK(iter != client_sockets_.end());
// `OnClose` is triggered by socket Close callback, deleting `socket` while
// processing that callback might be unsafe.
auto node = client_sockets_.extract(iter);
Thread::Current()->PostTask([node = std::move(node)] {});
}
const Environment env_;
std::unique_ptr<Socket> server_socket_;
std::set<std::unique_ptr<AsyncTCPSocket>, less_unique_ptr> client_sockets_;
};
} // namespace webrtc
#endif // RTC_BASE_TEST_ECHO_SERVER_H_
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