C Networking – Exercise 3

Overview

This repository contains the solutions to Exercise 3 from the Computer Networks course, implemented in C.
The project is divided into two parts:

• Part A – Socket programming and basic server implementation
• Part B – Concurrent networking and threaded client‑server interaction

Topics Covered

• Socket programming (TCP/UDP)
• Client/server communication
• Multi‑client handling
• Concurrency with threads
• Message passing between networked processes

Repository Structure

Part A/ # Socket server and networking code Part B/ # Threaded networking and concurrent communication

Technologies

• C — primary language
• BSD sockets API for network communication
• pthread (POSIX threads) for concurrency
• Compilable with a standard GCC toolchain

Building & Running

Part A

cd "Part A"
gcc -o server server.c   # adjust filenames if needed
./server

Part B

cd "Part B"
gcc -o client client.c server.c -lpthread   # example
./server

and then run client

Note: Each part may include multiple C source files. Use a Makefile or gcc directly.

Example Usage

For Part A:

./server

Connect using telnet / netcat or custom client

For Part B:

./server
./client

Follow the on‑screen instructions and input formats.

What You’ll Learn

This project demonstrates:

• Low‑level socket I/O in C
• Communication protocols
• Handling multiple clients
• Concurrency and thread synchronization