Multithreaded Multi-Client Socket Server in C++

This is a C++ project implementing a multithreaded TCP socket server capable of handling multiple clients concurrently using std::thread.

Each client connection is accepted and handled in a separate thread, allowing the server to manage simultaneous messaging in real-time.

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Features

• IPv4 TCP socket setup
• Multithreading using std::thread
• Handles multiple client connections concurrently
• Continuous message exchange with each client (not just once)
• Graceful disconnection handling per client
• Clean socket shutdown and resource management

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Technologies Used

• C++
• POSIX Sockets (<sys/socket.h>, <netinet/in.h>)
• std::thread (C++11 threading)
• recv() / send() for communication
• atomic<int> for assigning client IDs

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How It Works

1. The server starts and listens on a defined port (default: 5000).
2. Each incoming client connection is accepted using accept().
3. A new thread is spawned per client using std::thread.
4. The server continuously listens for messages from each client.
5. Upon disconnection or failure, the thread closes that client’s socket and exits.

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Sample Output

binding complete... Server is listening on port 5000... Accepted client [1] Accepted client [2] [client 1 ]: Hello from client 1! [client 2 ]: Hi server!

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Let me know if you'd like to:

• Add screenshots or GIFs of terminals communicating
• Include a simple C++ or Python client in the repo
• Write a companion blog article for it

I can help with any of those too.