📁 TFTP Client-Server File Transfer System

📌 Overview

This project is a simplified implementation of the TFTP (Trivial File Transfer Protocol) using C and UDP sockets. It enables reliable file transfer between a client and a server using block-based communication, acknowledgments, and retry mechanisms.

The project demonstrates how reliability can be built on top of an unreliable protocol like UDP.

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🚀 Features

• 📤 Upload files from client to server (PUT / WRQ)

• 📥 Download files from server to client (GET / RRQ)

• 📦 Block-based data transfer (512 bytes)

• 🔁 Acknowledgment (ACK) mechanism for reliability

• ⏱ Timeout and retry handling

• 🔄 Multiple transfer modes:

  • Normal (512 bytes)
  • Octet (1 byte at a time)
  • Netascii (newline conversion)

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🛠 Tech Stack

• C Programming
• UDP Socket Programming
• Linux System Calls

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