我想问一下，如何让套接字客户端反复等待服务器。例如，如果套接字服务器没有运行，那么客户端在connect（）期间等待大约1-3秒，然后抛出错误10038（WSAENOTSOCK）。如果服务器准备好了，那么它连接。
我希望客户端在服务器不可达时等待。是否有任何标志？我尝试将connect（）放入while（）循环，但没有用。
下面是重要的fromcode

#define SOCKET_DEFAULT_PROTOCOL SOCK_STREAM

    typedef struct dev_socket {
        std::string ip = "";
        std::thread openner;
        unsigned short port = 0;
        SOCKET num = 0, external_num = 0;
    }dev_socket;
    
    int openClientSocket(dev_socket &io, std::string server_ipv4, unsigned short port) {
        char *server_name = (server_ipv4.empty() ? localhost_addr : const_cast<char*>(server_ipv4.c_str()));
        int retval, socket_type = SOCKET_DEFAULT_PROTOCOL;
        struct sockaddr_in server;
        struct hostent *hp;
    #if defined(_WIN32)
        int fromlen;
    #else
        socklen_t fromlen;
    #endif
    
    #if defined(_WIN32)
        WSADATA wsaData;
        if ((retval = WSAStartup(MAKEWORD(2, 0), &wsaData)) != 0) {
            cout << "ERROR! Client: WSAStartup() failed (socket number " + std::to_string(io.num) +
                ") with error " + std::to_string(retval) + ".\n";
            WSACleanup();
            return 1;
        }
    #endif
    
        // Attempt to detect if we should call gethostbyname() or gethostbyaddr()
        hp = gethostbyname(server_name);
        if (hp == NULL) {
            cout << "ERROR! Client: Cannot resolve address \"" + (std::string)(server_name) + "\": Error.\n";
            cleenup();
            return 1;
        }
    
        //Creating SOCKET
        // Copy the resolved information into the sockaddr_in structure
        memset(&server, 0, sizeof(server));
        memcpy(&(server.sin_addr), hp->h_addr, hp->h_length);
        server.sin_family = hp->h_addrtype;
        server.sin_port = htons(port);
        io.num = socket(AF_INET, socket_type, 0); /* Open a socket */
        if (io.num < 0) {
            cout << "ERROR! Client: Error Opening socket number " + std::to_string(io.num) + ". " + getSocketErrorOrNewLine();
            cleenup();
            return 1;
        }
    
        //CONNECTing
        if ((connect(io.num, (struct sockaddr*)&server, sizeof(server))) == -1) {
            cout << "ERROR! Client: connect() failed (socket number " + std::to_string(io.num) + "). " + getSocketErrorOrNewLine();
            cleenup();
            return 1;
        }
    }

提前感谢您的回答。

**UPDATE：**while（）循环正在工作（但可能不是最佳）解决方案-测试API时存在错误。