Rust Network Programming — TCP/UDP Sockets, WebSockets, and Network Services

DodaTech Updated 2026-06-28 1 min read

In this tutorial, you will learn about Rust Network Programming. We cover key concepts, practical examples, and best practices to help you master this topic.

Rust network programming uses tokio for TCP/UDP async sockets, tungstenite for Websocket client/server, and Quinn for QUIC protocol implementation.

What You'll Learn

TCP server with tokio
UDP multicast
WebSocket server
Custom protocols

Why It Matters

Network services underpin the internet. DodaZIP uses TCP for file transfer. Discord uses Rust for network services.

Real-World Use

Chat servers, file transfer, real-time data streaming, custom protocol handling.

use tokio::net::{TcpListener, TcpStream};
use tokio::io::{AsyncReadExt, AsyncWriteExt};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let listener = TcpListener::bind("127.0.0.1:8080").await?;

    loop {
        let (socket, addr) = listener.accept().await?;
        println!("New connection from: {}", addr);

        tokio::spawn(async move {
            handle_connection(socket).await;
        });
    }
}

async fn handle_connection(mut socket: TcpStream) {
    let mut buf = [0; 1024];

    loop {
        match socket.read(&mut buf).await {
            Ok(0) => return, // Connection closed
            Ok(n) => {
                if let Err(e) = socket.write_all(&buf[..n]).await {
                    eprintln!("Write error: {}", e);
                    return;
                }
            }
            Err(e) => {
                eprintln!("Read error: {}", e);
                return;
            }
        }
    }
}

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