Concurrent FTP Client

A concurrent FTP client for Linux implementing RFC 959. It uses a multi-process architecture (via fork()) to handle file transfers in the background, keeping the shell prompt active for other commands.

Implemented Commands

Implemented according to the main project objective:

• USER, PASS, STOR, RETR, PORT, PASV

Additional commands implemented:

• MKD, PWD, LIST, DELE, CWD, QUIT

Key Features

• Concurrency: Non-blocking uploads/downloads.
• Modes: Supports Passive (PASV) (default) and Active (PORT).
• Resuming: restart <bytes> allows resuming interrupted transfers.
• File Management: ls, cd, mkdir, delete, pwd.
• Modular C: Built on Linux Socket API.

Build & Run

Prerequisites: Linux, GCC, Make.

# 1. Compile
make

# 2. Run
./MartinezK_clienteFTP <server_ip>
# Example: ./MartinezK_clienteFTP 127.0.0.1

To clean build files: make clean

Commands Reference

Enter credentials when prompted. Once inside (ftp>), use:

Category	Commands	Description
Transfer	get <file>, put <file>	Download / Upload files.
	restart <bytes>	Start next transfer from byte offset.
Navigation	ls, pwd, cd <path>	List, show path, change dir.
Actions	mkdir <name>, delete <file>	Create dir / Delete file.
System	passive	Toggle PASV / PORT mode.
	help, quit	Show help / Exit.

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Author: Kevin Martínez | @Al3xMR