TinyOne

A simple FTP server implement by C.

Basic Introduction

• File Transfer Protocol
• Working in the application layer of the TCP/IP protocol family
• FTP will establish two connections, separate the command from the data
• Transfer file model
  • PORT: client -> PORT -> server, port > 1024
  • PASV: client -> PASV -> server, port < 1024

FTP Process

• Launch FTP
• Establish control connection
• Establish a data connection and transfer files
• Close FTP

Socket Programming Process

• Socket Client
  • use socket() to create a Socket
  • use connect() to connect server
  • use write() and read() to communicate with each other
  • use close() to close Socket
• Socket Server
  • use socket() to create a Socket
  • use bind() to bind Socket
  • use listen() to listen Socket
  • use accept() to recieve request
  • use write() and read() to communicate with each other
  • use close() to close Socket

Architect

.
├── README.md
├── base
│   ├── to_base.c
│   └── to_base.h
├── bin
│   ├── toc
│   └── tos
├── client
│   ├── makefile
│   ├── to_client.c
│   └── to_client.h
├── pic
│   ├── snapshot.png
│   └── structure.png
└── server
    ├── auth.txt
    ├── makefile
    ├── tmp.txt
    ├── to_server.c
    └── to_server.h

How-To

// build
$ git clone https://github.com/i0Ek3/TinyOne
$ cd TinyOne
$ cd client ; make
$ cd server ; make

// run
$ ./tos port
$ ./toc ip port

or run toc and tos directly under /bin.

// login
username: admin   username: admin
password: admin   password: 

//commands
list or ls
get or download
put or upload
quit or q

Snapshot

Issue

• Execute tos and toc under /bin will appear "No such file or directory" error, cause of server cannot locate auth.txt.

To-Do

• More commands support
• Breakpoint resume
• Server-side synchronization display

References

• FILE TRANSFER PROTOCOL
• 使用 Socket 通信实现 FTP 客户端程序