利用UDP协议，实现局域网聊天功能。可以主动或被动发起聊天，同时选择多个用户聊天，查看聊天记录。-Using the UDP protocol, LAN chat feature. Can be active or passive initiate a chat, select multiple users at the same time chat, view chat history.

通过UDP协议，用于指定文件上传至服务器的文件上传工具，选择文件包含自校验是否属于需求文件(Through the UDP protocol, is used to specify the file upload to server file upload tool, select file contains self checking whether belong to demand)