这是P2P网络编程的ＮＡＴ穿透客户端的实现，可以作为参考并修改。-This is a P2P network programming through NAT client implementation, can serve as a reference and modified.

p2p实现即时聊天，视频聊天功能部分不完善，需要修改。-p2p instant chat, video chat part of the imperfect, need to be modified.