OurTorrent

OurTorrent is a peer-to-peer (P2P) file-sharing system inspired by the BitTorrent protocol. This decentralized system allows users to download files more quickly by connecting with multiple uploaders, rather than relying on a single central server. OurTorrent aims to simulate a peer-to-peer file-sharing experience, including a custom client and a lightweight UDP tracker for efficient, low-overhead communication.

Key Features

1. UDP Tracker
2. Asynchronous Socket Handling
3. Bencoding Serialization Library
4. Error Handling
5. Security

Project Phases

1. Phase 1:

   • Built a client compatible with the BitTorrent protocol that can download files using torrent files.
   • Our client connects with general internet-based trackers to join peer groups and download any specified file.

2. Phase 2:

   • Developed our own UDP tracker for a deeper understanding of the protocol.
   • The tracker manages essential attributes for each peer, including peer IDs, seeders, and leechers, and shares this information with clients upon request.

Tech Stack and Libraries

1. C++ for Tracker
2. Python for Client

Tools and Technologies Used

• Sqlite3 for database
• POSIX socket libraries
• OpenSSL for SHA1 hash
• Rich package for table formatting
• urrlib3 library for HTTP connections

Note: Since the project uses POSIX libraries which are unavailable on Windows, it is requested to use a Linux system.

Installation

1. Clone and navigate to the repository:

   git clone https://github.com/Project-Group-Computer-Networks/OurTorrent.git
   cd OurTorrent

2. For running Tracker:

   • Navigate to tracker_implementation
   • Install the following dependencies:

   sudo apt update
   sudo apt install sqlite3

   • Compile the executable file:

   g++ main.cpp db_manager.cpp peer_manager.cpp udp_server.cpp socket_util.cpp -l sqlite3 -o bittorrent_tracker

   • The file is ready for use; to run:

   ./bittorrent_tracker

3. For running Client:

   • Navigate to client_implementation
   • Download all the pre-requisites present in /requirements.txt

   pip install -r requirements.txt

   • Change directory to src and run the help command

   cd src
   python3 main.py --help
   

   • To test the code, run the client with a torrent file present in examples folder As an example, we are using a torrent file from examples folder and creating a new folder as destination.

   mkdir ../downloads
   python3 main.py ../examples/ubuntu.torrent -d ../downloads/
   

4. For running Tester:

   • Navigate to tester_implementation
   • Install OpenSSL libraries in Linux :

   sudo apt-get install libssl-dev

   • To run the directory code:

   g++ -o client main.cpp announce_request.cpp connect_request.cpp peer_decoder.cpp -std=c++20 -lssl -lcrypto
   ./client

Video Demo Link:

Video Demo Link

Contributors:

• Meet Sindhav
• Mohammed Haaziq
• Aditya Mundada
• Nayan Kakade
• Sarvesh Baheti
• Roopam Taneja

Made with ❤️ by team "OurTorrent"