ftps的代码实现，用socket底层函数来实现的，代码结构比较简单，可以正常登录Serv-u和windows下的IIS ftps服务器。注意登录时，ftps命令通道发送的指令顺序有区别。请认真查看源代码。代码可能不能直接编译通过，是从实际的公司产品代码中挖出来的，请见谅。需要稍候修改下。但是ftps的操作过程很清晰。-the ftps The code to achieve, the socket underlying function, the code structure is relatively simple, you can log in normally IIS ftps server Serv-u and windows. Note login, ftps command differentiated instruction sequence sent by the channel. Please carefully view the source code. The code may not be directly compiled through, from the actual product code of dug, please forgive me. Need to wait to modify under. However, the the ftps operation very clear.