基于P2P网络的聊天系统的研发

Research & development of netmeeting system based on P2P Net

主要介绍了基于P2P网络的聊天系统的设计原理与体系结构,并且根据研究的结果开发出了界面友好、方便易用的即时通讯聊天工具。本文首先介绍了软件开发技术基础,其次分析了该系统的功能构成与体系结构,然后详细介绍了该系统的设计与实现中的网络通信功能设计、界面设计、UDP数据包通过NAT网关、文件传输模块的设计等问题。最后,提出了进一步的改进方案。另外,由于本系统传输层采用不可靠的UDP协议,还设计了在UDP环境下进行可靠通信的机制。

This paper mainly discusses the principle of design and architecture of instant messenger system under the P2P network environment.In accordance with the research,a IM software,which has a friendly interface and is simple to use is exploited.First some related knowledge of network analyzing the architecture structure of the system is summarized.Second,in particular the design and exploitation of the system is introduced.Some topics as follows: the design of network communication module、using UDP to traverse NAT under P2P network environment、design of user interface、design of file sending module etc.are expounded.Additionally,because UDP is not a reliable protocol transfer data,a method of reliable transfer data under UDP environment is developed.In the end,some proposals to improve this system are given.