mirror of
https://github.com/n0-computer/noq.git
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Benjamin Saunders
84 lines
3.0 KiB
Rust
84 lines
3.0 KiB
Rust
//! You can have multiple QUIC connections over a single UDP socket. This is especially
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//! useful, if you are building a peer-to-peer system where you potentially need to communicate with
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//! thousands of peers or if you have a
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//! [hole punched](https://en.wikipedia.org/wiki/UDP_hole_punching) UDP socket.
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//! In addition, QUIC servers and clients can both operate on the same UDP socket.
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//!
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//! This example demonstrate how to make multiple outgoing connections on a single UDP socket.
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//!
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//! Run:
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//! ```text
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//! $ cargo run --example single_socket
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//! ```
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//!
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//! The expected output should be something like:
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//! ```text
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//! [server] incoming connection: id=bdd481e853111f09 addr=127.0.0.1:43149
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//! [server] incoming connection: id=bfdeae5f7a67d89f addr=127.0.0.1:43149
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//! [server] incoming connection: id=36ae757fc0d81d6a addr=127.0.0.1:43149
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//! [client] connected: id=751758ed2c93350e, addr=127.0.0.1:5001
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//! [client] connected: id=3722568139d78726, addr=127.0.0.1:5000
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//! [client] connected: id=621265b108a59fad, addr=127.0.0.1:5002
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//! ```
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//!
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//! Notice how server sees multiple incoming connections with different IDs coming from the same
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//! endpoint.
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use futures::StreamExt;
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use std::{error::Error, net::SocketAddr};
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use quinn::Endpoint;
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mod common;
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use common::{make_client_endpoint, make_server_endpoint};
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#[tokio::main]
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async fn main() -> Result<(), Box<dyn Error>> {
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let addr1 = "127.0.0.1:5000".parse().unwrap();
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let addr2 = "127.0.0.1:5001".parse().unwrap();
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let addr3 = "127.0.0.1:5002".parse().unwrap();
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let server1_cert = run_server(addr1)?;
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let server2_cert = run_server(addr2)?;
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let server3_cert = run_server(addr3)?;
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let client = make_client_endpoint(
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"127.0.0.1:0".parse().unwrap(),
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&[&server1_cert, &server2_cert, &server3_cert],
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)?;
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// connect to multiple endpoints using the same socket/endpoint
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futures::future::join_all(vec![
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run_client(&client, addr1),
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run_client(&client, addr2),
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run_client(&client, addr3),
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])
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.await;
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// Make sure the server has a chance to clean up
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client.wait_idle().await;
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Ok(())
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}
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/// Runs a QUIC server bound to given address and returns server certificate.
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fn run_server(addr: SocketAddr) -> Result<Vec<u8>, Box<dyn Error>> {
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let (mut incoming, server_cert) = make_server_endpoint(addr)?;
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// accept a single connection
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tokio::spawn(async move {
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let quinn::NewConnection { connection, .. } = incoming.next().await.unwrap().await.unwrap();
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println!(
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"[server] incoming connection: addr={}",
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connection.remote_address()
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);
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});
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Ok(server_cert)
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}
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/// Attempt QUIC connection with the given server address.
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async fn run_client(endpoint: &Endpoint, server_addr: SocketAddr) {
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let connect = endpoint.connect(&server_addr, "localhost").unwrap();
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let quinn::NewConnection { connection, .. } = connect.await.unwrap();
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println!("[client] connected: addr={}", connection.remote_address());
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}
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