Function runTcpServer

examples/sockets/TCP.cpp:59–101

/////////////////////////////////////////////////////// Launch a server, wait for an incoming connection, send a message and wait for the answer. ///////////////////////////////////////////////////////

///
////////////////////////////////////////////////////////////
void runTcpServer(unsigned short port, bool tls)
{
    // Create a server socket to accept new connections
    sf::TcpListener listener;

    // Listen to the given port for incoming connections
    if (listener.listen(port) != sf::Socket::Status::Done)
        return;
    std::cout << "Server is listening to port " << port << ", waiting for connections... " << std::endl;

    // Wait for a connection
    sf::TcpSocket socket;
    if (listener.accept(socket) != sf::Socket::Status::Done)
        return;
    std::cout << "Client connected: " << socket.getRemoteAddress().value() << std::endl;

    if (tls)
    {
        // Setup TLS
        if (socket.setupTlsServer(certificate, privateKey) != sf::TcpSocket::TlsStatus::HandshakeComplete)
        {
            std::cout << "TLS handshake could not be completed" << std::endl;
            return;
        }
        std::cout << "TLS set up" << std::endl;

        if (auto ciphersuite = socket.getCurrentCiphersuiteName(); ciphersuite)
            std::cout << "Ciphersuite in use: " << *ciphersuite << std::endl;
    }

    // Send a message to the connected client
    static constexpr std::string_view out = "Hi, I'm the server";
    if (socket.send(out.data(), out.size()) != sf::Socket::Status::Done)
        return;
    std::cout << "Message sent to the client: " << std::quoted(out.data()) << std::endl;

    // Receive a message back from the client
    std::array<char, 128> in{};
    std::size_t           received = 0;
    if (socket.receive(in.data(), in.size(), received) != sf::Socket::Status::Done)
        return;
    std::cout << "Answer received from the client: " << std::quoted(in.data()) << std::endl;
}


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