SOCKET编程本地通信 捕获本机网卡的IP包，对捕获的IP包进行解析。要求必须输出以下字段：版本号、总长度、标志位、片偏移、协议、源地址和目的地址。(SOCKET programming local communication Capture the IP packet of the local network card and parse the captured IP package. The following fields are required to be output: ve