Question

我正在使用套接字和UDP编写网络通信应用程序。到目前为止，我能够在同一台机器上运行客户端和服务器，但是现在我想转移到两个独立的机器上。使用的大多数通信代码都基于SFML库提供的示例，但我无法在计算机之间进行连接。每当我尝试通过提供IP和端口来连接计算机时，根本没有来自服务器的响应。这是我的服务器代码：

std::shared_ptr<sf::UdpSocket> startUdpServer()
{
    std::cout << "Local address: ";
    std::cout << sf::IpAddress::getLocalAddress().toString() << std::endl;
    std::cout << "Public address: ";
    std::cout << sf::IpAddress::getPublicAddress().toString() << std::endl;
    // Create a socket to receive a message from anyone
    std::shared_ptr<sf::UdpSocket> socket(new sf::UdpSocket());

    // Listen to messages on the first free port
    if(socket->bind(sf::Socket::AnyPort) != sf::Socket::Done)
        return nullptr;
    std::cout << "Server is listening to port " << socket->getLocalPort() << ", waiting for a message... " << std::endl;
    return socket;
}

std::pair<sf::IpAddress, unsigned short> runUdpServer(std::shared_ptr<sf::UdpSocket> socket)
{
    // Wait for a message
    char in[128];
    std::size_t received;
    sf::IpAddress sender;
    unsigned short senderPort;
    if (socket->receive(in, sizeof(in), received, sender, senderPort) != sf::Socket::Done)
    {
        std::cout << "Connection error" << std::endl;
        return std::make_pair(sender, senderPort);
    }
    std::cout << "Message received from client " << sender << ": \"" << in << "\"" << std::endl;
    return std::make_pair(sender, senderPort);
}

void sendUdpMessage(std::shared_ptr<sf::UdpSocket> socket, std::pair<sf::IpAddress, unsigned short> config,
                    std::string message)
{
    // Send an answer to the client
    const char* out = message.c_str();
    if (socket->send(out, sizeof(char) * message.length(), config.first, config.second) != sf::Socket::Done)
        return;
    std::cout << "Message sent to the client: \"" << out << "\"" << std::endl;
}

和客户：

std::shared_ptr<sf::UdpSocket> startUdpClient()
{
    // Ask for the server address
    sf::IpAddress server;
    do
    {
        std::cout << "Type the address or name of the server to connect to: ";
        std::cin  >> server;
    }
    while (server == sf::IpAddress::None);

    unsigned short port;
    std::cout << "Type the port number: ";
    std::cin >> port;

    // Create a socket for communicating with the server
    std::shared_ptr<sf::UdpSocket> socket(new sf::UdpSocket());

    sf::Packet packet;
    // Send a message to the server
    const char out[] = "Hi, I'm a client";
    if (socket->send(out, sizeof(out), server, port) != sf::Socket::Done)
        return nullptr;
    std::cout << "Message sent to the server: \"" << out << "\"" << std::endl;
    return socket;
}

void runUdpClient(std::shared_ptr<sf::UdpSocket> socket, Buffer<std::string>& value)
{
    // Receive an answer from anyone (but most likely from the server)
    char in[256];
    std::size_t received;
    sf::IpAddress sender;
    unsigned short senderPort;
    if (socket->receive(in, sizeof(in), received, sender, senderPort) != sf::Socket::Done)
        return;
    value.emplace_back(in);
}

我能做些什么才能让它发挥作用？有什么想法吗？

编辑＃1：

正如所指出的，我忘了提到我正在使用的系统。目前两者都是Windows，但我打算以不同的组合使用所有系统（据我所知，套接字与操作系统的通信无关）。

使用SFML在两台机器之间进行套接字通信

0 个答案: