SwiftFile: FTP Server With Custom TCP/IP Stack

A secure FTP server and client implementation in Python featuring a custom TCP/IP stack, built-in file system with SQLite backend, and interactive command-line interfaces.

Features

Core Features

• Standard FTP command support (RFC 959)
• TLS/SSL encryption (FTPS)
• User authentication and access control
• File system permissions management
• Passive mode data transfers
• Compatible with FileZilla and other standard FTP clients

Built-in File System

• SQLite-backed virtual file system
• File ownership management
• Access control
• Interactive file system CLI

Client Features

• Interactive command-line client
• TLS/FTPS support

Custom TCP/IP Stack

• Raw socket TCP implementation
• Connection establishment (3-way handshake)
• Keep-Alive
• TCP flags, sequence numbers, window sizing

Supported FTP Commands

Authentication Commands

• USER - Login username
• PASS - Login password
• REIN - Reinitialize session
• QUIT - End session

File Operations

• RETR - Download file
• STOR - Upload file
• DELE - Delete file
• RNFR - Rename from (source)
• RNTO - Rename to (destination)

Directory Operations

• LIST - List files
• MLSD - Machine list directory
• PWD - Print working directory
• CWD - Change working directory
• CDUP - Change to parent directory
• MKD - Create directory
• RMD - Remove directory

Settings & Info

• TYPE - Set transfer type
• OPTS - Set options
• FEAT - Get features
• SYST - Get system info
• HELP - Show help
• NOOP - No operation

Security Commands

• AUTH TLS - Initialize TLS
• PBSZ - Protection buffer size
• PROT - Data channel protection level

File System CLI Commands

• login <user> <pass> - Login to system
• logout - Logout from system
• ls [path] - List directory contents
• cd <path> - Change directory

pwd

• Print working directory

mkdir

• Create directory

rmdir

• Remove directory

touch

• Create empty file
• rm <file> - Remove file

chmod

• Change permissions

rename

• Rename file/directory

Installation

Starting the Server

# Linux
./deploy_server.sh

# Windows 
.\deploy_server.ps1

Or manually:

1. Clone the repository
2. Install dependencies:

pip install -r requirements.txt

pip install -r requirements.txt
python start_server.py

Using the FTP Client

python src/ftp_client/start_client.py

Using the File System CLI

python file_system_cli.py -i

Configuration

Server settings in server_config.json

{
    "ftp_host": "127.0.0.1", 
    "ftp_port": 229,
    "use_custom_transport": false,
    "support_FTPS": true
}

Contributors

• Miaad2004
• taha-najaf