点到点传输协议编写的一个程序，来源于一本书上-Point-to-point transmission protocol prepared by a procedure derived from a book

基于JXTA的P2P即时通信和文件共享系统设计，内有代码和类设计-Based on JXTA' s P2P real-time communication and file-sharing system design, with a design code and category