Peerlink

Peerlink

Peerlink is a decentralized social network and BitTorrent client. It allows users to:

• Discover peers and join groups via a simple TCP server
• Chat with other users in groups
• Download files using the BitTorrent protocol (from .torrent files or magnet links)

Features

• Peer Discovery Server: Maintains a list of connected peers and groups.
• Client: Connects to the server, joins groups, and sends/receives messages.
• BitTorrent Client: Parses .torrent files or magnet links, discovers peers, downloads files in pieces, and assembles the final file.

Prerequisites

• Go 1.18 or higher

Installation

1. Clone the repository:

   git clone https://github.com/pr-a-nav/Peerlink.git
   cd Peerlink
   

2. Download dependencies:

   go mod tidy
   

Usage

1. Start the Peer Discovery Server

In one terminal:

go run server.go

You should see:

Server is listening on :9000

2. Start a Client

In another terminal:

go run client/client.go

• The client will connect to the server, print the peer list, and prompt you to join a group and send messages.

3. Start the BitTorrent Client

In a third terminal:

go run peerlink.go <torrent-file-or-magnet-link>

• Replace <torrent-file-or-magnet-link> with the path to a .torrent file or a magnet link.
• The client will parse the file/link, discover peers, and download the file as output.data.

Example Workflow

1. Alice runs the server: go run server.go
2. Bob runs the client: go run client/client.go
   • Bob sees the peer list, joins a group, and sends a message.
3. Alice runs the BitTorrent client: go run peerlink.go myfile.torrent
   • Alice downloads a file using BitTorrent, possibly using the peer list from the server for additional peer discovery.

Project Structure

Peerlink/
├── client/         # Client code for group chat and peer discovery
│   └── client.go
├── peer/           # BitTorrent peer protocol implementation
├── torrentfile/    # Torrent file and magnet link parsing
├── tracker/        # Tracker communication
├── server.go       # Peer discovery/group server
├── peerlink.go     # BitTorrent client main file
└── README.md

Contributing

Pull requests are welcome! For major changes, please open an issue first to discuss what you would like to change.

License

MIT