一个FTP文件传输协议的原代码,比较经典,对初学者比较合适,-An FTP file transfer protocol source code, more classic, is suitable for beginners.

TCP协议下的文件传输系统,服务器端和客户端间通过IP地址的确认来实现通信(File transfer system under the TCP protocol, between client and server to implement communication through IP address confirmation)