Introduction to socket programming with Python, used for hands-on sessions in the Computer Networking course at Amirkabir University of Technology.

This repository provides practical examples of network communication using Python's socket module. It covers both TCP (connection-oriented) and UDP (connectionless) protocols, helping students understand low-level network programming without spending too much time on setup.

The chosen language is Python, which is also used in the textbook Computer Networking: A Top-Down Approach by Jim Kurose and Keith Ross.

• Python 3.8 or higher
• Basic understanding of networking concepts (IP addresses, ports, TCP/UDP)

socket.py/
├── README.md
├── LICENSE
├── lecture/
│   └── main.tex          # LaTeX source for lecture notes
└── src/
    ├── tcp/
    │   ├── server.py     # Multi-threaded TCP echo server
    │   └── client.py     # TCP echo client
    └── udp/
        ├── sender.py     # UDP broadcast sender
        └── receiver.py   # UDP broadcast receiver

The TCP example demonstrates a simple echo server that receives messages and sends them back to the client.

Terminal 1 - Start the server:

python src/tcp/server.py

Terminal 2 - Run the client:

python src/tcp/client.py

The client sends a message to the server, and the server echoes it back.

The UDP example demonstrates broadcasting messages across a network.

Terminal 1 - Start the receiver:

python src/udp/receiver.py

Terminal 2 - Start the sender:

python src/udp/sender.py

The sender broadcasts messages every second, which are received by the receiver.

• AF_INET - IPv4 addresses
• AF_INET6 - IPv6 addresses

• SOCK_STREAM - TCP (reliable, connection-oriented)
• SOCK_DGRAM - UDP (unreliable, connectionless)

• Python socket documentation
• Computer Networks course materials
• Computer Networking: A Top-Down Approach

The built version of the lecture can be accessed from the releases section. Each release belongs to a specific semester.

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.