Rt-thread 移植WIZnet,使用自带案列,设备ping电脑能ping通,就是主板与电脑连接不上

server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(port);
    server_addr.sin_addr = *((struct in_addr *)host->h_addr);
    rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));
    /* 连接到服务端 */
    if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
    {
        /* 连接失败 */
        rt_kprintf("Connect fail!\n");
        closesocket(sock);
        /*释放接收缓冲 */
        rt_free(recv_data);
        return;
    }