WINSOCK、TCP：两台计算机之间没有连接

Question

我无法从同一本地网络上另一台计算机上的客户端连接到计算机上的 TCP 服务器。我收到错误 10060。 如果客户端与服务器在同一台计算机上启动，我就能够连接到服务器。

这是有关服务器的一些信息，然后是客户端的信息 (客户端运行在 .30 上，服务器 = .50)

客户端的 TCP 信息

这里我们可以看到我的客户端正在向正确的 IP/端口发送 SYN 信号

服务器的 TCP 信息

服务器似乎正在监听任何IP和端口。所以听起来我不明白如何设置setsockopt。

如果客户端不在同一台计算机上，这是服务器的 main() ，它将无法工作：

int main(int argc, char **argv){
    if(argc != 2){
        printf("Usage: %s <port>\n", argv[0]);
        return EXIT_FAILURE;
    }
    // Start of experiment
    WORD wVersionRequested;
    WSADATA wsaData;
    int err;

/* Use the MAKEWORD(lowbyte, highbyte) macro declared in Windef.h */
    wVersionRequested = MAKEWORD(2, 2);
    err = WSAStartup(wVersionRequested, &wsaData);
    if (err != 0) {
        /* Tell the user that we could not find a usable */
        /* Winsock DLL.                                  */
        printf("WSAStartup failed with error: %d\n", err);
        return 1;
    }

    if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2)
    {
        /* Tell the user that we could not find a usable */
        /* WinSock DLL.                                  */
        printf("Could not find a usable version of Winsock.dll\n");
        WSACleanup();
        return 1;
    }
    else
    {
        printf("The Winsock 2.2 dll was found okay\n");
    }

    char *ip = "127.0.0.1";
    int port = atoi(argv[1]);
    //int option = 1;
    bool option = TRUE;
    int listenfd = 0, connfd = 0;
  struct sockaddr_in serv_addr;
  struct sockaddr_in cli_addr;
  pthread_t tid;

  /* Socket settings */
  listenfd = socket(AF_INET, SOCK_STREAM, 0);
  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
  serv_addr.sin_port = htons(port);

  /* Ignore pipe signals */
    //signal(SIGPIPE, SIG_IGN); Sigpipe doesnt exist in NT. I need to implement something ...

    if(setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, (char *) &option, sizeof(option)) < 0){
        perror("ERROR: setsockopt failed\n");
        printf("Error : %i\n",WSAGetLastError());
        printf("port was: %i\n",port);
        printf("Ip Was : %lu\n",serv_addr.sin_addr.s_addr);
        WSACleanup();
    return EXIT_FAILURE;
    }

    /* Bind */
  if(bind(listenfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0) {
    perror("ERROR: Socket binding failed");
    WSACleanup();
    return EXIT_FAILURE;
  }

  /* Listen */
  if (listen(listenfd, 10) < 0) {
    perror("ERROR: Socket listening failed");
    WSACleanup();
    return EXIT_FAILURE;
    }

    printf("=== WELCOME TO THE CHATROOM ===\n");

    while(1){
        socklen_t clilen = sizeof(cli_addr);
        connfd = accept(listenfd, (struct sockaddr*)&cli_addr, &clilen);

        /* Check if max clients is reached */
        if((cli_count + 1) == MAX_CLIENTS){
            printf("Max clients reached. Rejected: ");
            print_client_addr(cli_addr);
            printf(":%d\n", cli_addr.sin_port);
            close(connfd);
            continue;
        }

        /* Client settings */
        client_t *cli = (client_t *)malloc(sizeof(client_t));
        cli->address = cli_addr;
        cli->sockfd = connfd;
        cli->uid = uid++;

        /* Add client to the queue and fork thread */
        queue_add(cli);
        pthread_create(&tid, NULL, &handle_client, (void*)cli);

        /* Reduce CPU usage */
        sleep(1);
    }
    WSACleanup();

    return EXIT_SUCCESS;
}

我设法在弄乱参数时使其工作，但我无法重现它，因为我不明白如何winsock 还可以工作。 我尝试禁用两台计算机上的防火墙，但没有帮助。

非常感谢您的帮助！