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use anyhow::{anyhow, Result};
use async_trait::async_trait;
use bytes::BytesMut;
use futures_util::StreamExt;
use quinn::{Connection, Endpoint, IncomingBiStreams, ServerConfig};
use std::{error::Error, fs, net::SocketAddr, net::ToSocketAddrs, sync::Arc};
use url::Url;
#[async_trait]
pub trait QuicSocket {
async fn new(addr: Option<SocketAddr>) -> Self;
async fn send(&mut self, payload: Vec<u8>) -> Result<()>;
async fn recv(&mut self, buf: BytesMut) -> Result<usize>;
}
pub struct QuicServer {
pub endpoint: Endpoint,
pub connection: Connection,
pub bi_streams: IncomingBiStreams,
}
pub struct QuicClient {
pub endpoint: Endpoint,
pub connection: Connection,
pub bi_streams: IncomingBiStreams,
}
#[async_trait]
impl QuicSocket for QuicServer {
async fn new(addr: Option<SocketAddr>) -> QuicServer {
let server_config = configure_server().unwrap();
let (endpoint, mut incoming) =
quinn::Endpoint::server(server_config, addr.unwrap()).unwrap();
let new_conn = incoming.next().await.unwrap().await.unwrap();
let quinn::NewConnection {
connection: conn,
bi_streams,
..
} = new_conn;
QuicServer {
endpoint,
connection: conn,
bi_streams,
}
}
async fn send(&mut self, payload: Vec<u8>) -> Result<()> {
let (mut send, _) = self
.connection
.open_bi()
.await
.map_err(|e| anyhow!("failed to open stream: {}", e))
.unwrap();
send.write_all(&payload)
.await
.map_err(|e| anyhow!("failed to send request: {}", e))?;
send.finish()
.await
.map_err(|e| anyhow!("failed to shutdown stream: {}", e))?;
Ok(())
}
async fn recv(&mut self, mut bytes: BytesMut) -> Result<usize> {
let mut buf = [0; 200];
let (_, mut recv) = self.bi_streams.next().await.unwrap().unwrap();
let len = recv
.read(&mut buf)
.await
.map_err(|e| anyhow!("failed to read response: {}", e))?;
bytes.extend_from_slice(&mut buf[..len.unwrap()]);
Ok(len.unwrap())
}
}
#[async_trait]
impl QuicSocket for QuicClient {
async fn new(_addr: Option<SocketAddr>) -> Self {
let ca = "cert.der".to_string();
let mut roots = rustls::RootCertStore::empty();
roots
.add(&rustls::Certificate(fs::read(&ca).unwrap()))
.unwrap();
let mut client_crypto = rustls::ClientConfig::builder()
.with_safe_defaults()
.with_root_certificates(roots)
.with_no_client_auth();
client_crypto.alpn_protocols = ALPN_QUIC_HTTP.iter().map(|&x| x.into()).collect();
let mut endpoint = quinn::Endpoint::client("[::]:0".parse().unwrap()).unwrap();
endpoint.set_default_client_config(quinn::ClientConfig::new(Arc::new(client_crypto)));
let remote_url = Url::parse("http://127.0.0.1:4442").unwrap();
let host = Some("localhost".to_string());
let remote = (
remote_url.host_str().unwrap(),
remote_url.port().unwrap_or(4433),
)
.to_socket_addrs()
.unwrap()
.next()
.ok_or_else(|| anyhow!("couldn't resolve to an address"))
.unwrap();
let host = host
.as_ref()
.map_or_else(|| remote_url.host_str(), |x| Some(x))
.ok_or_else(|| anyhow!("no hostname specified"))
.unwrap();
let new_conn = endpoint
.connect(remote, host)
.unwrap()
.await
.map_err(|e| anyhow!("failed to connect: {}", e))
.unwrap();
let quinn::NewConnection {
connection: conn,
bi_streams,
..
} = new_conn;
QuicClient {
endpoint,
connection: conn,
bi_streams,
}
}
async fn send(&mut self, payload: Vec<u8>) -> Result<()> {
let (mut send, _) = self
.connection
.open_bi()
.await
.map_err(|e| anyhow!("failed to open stream: {}", e))
.unwrap();
send.write_all(&payload)
.await
.map_err(|e| anyhow!("failed to send request: {}", e))?;
send.finish()
.await
.map_err(|e| anyhow!("failed to shutdown stream: {}", e))?;
Ok(())
}
async fn recv(&mut self, mut bytes: BytesMut) -> Result<usize> {
let mut buf = [0; 200];
let (_, mut recv) = self.bi_streams.next().await.unwrap().unwrap();
let len = recv
.read(&mut buf)
.await
.map_err(|e| anyhow!("failed to read response: {}", e))?;
bytes.extend_from_slice(&mut buf[..len.unwrap()]);
Ok(len.unwrap())
}
}
#[allow(clippy::field_reassign_with_default)]
fn configure_server() -> Result<ServerConfig, Box<dyn Error>> {
let cert_chain = fs::read("./cert.der")?;
let key = fs::read("./key.der")?;
let priv_key = rustls::PrivateKey(key);
let cert = vec![rustls::Certificate(cert_chain.clone())];
let mut server_crypto = rustls::ServerConfig::builder()
.with_safe_defaults()
.with_no_client_auth()
.with_single_cert(cert, priv_key)?;
server_crypto.alpn_protocols = ALPN_QUIC_HTTP.iter().map(|&x| x.into()).collect();
let mut server_config = quinn::ServerConfig::with_crypto(Arc::new(server_crypto));
Arc::get_mut(&mut server_config.transport)
.unwrap()
.max_concurrent_uni_streams(0_u8.into());
Ok(server_config)
}
#[allow(unused)]
#[allow(clippy::field_reassign_with_default)]
pub fn gen_certificates() -> Result<(), Box<dyn Error>> {
let cert = rcgen::generate_simple_self_signed(vec!["localhost".into()]).unwrap();
let cert_der = cert.serialize_der().unwrap();
fs::write("./cert.der".to_string(), &cert_der).unwrap();
let priv_key = cert.serialize_private_key_der();
fs::write("./key.der".to_string(), &priv_key).unwrap();
let key = rustls::PrivateKey(priv_key);
let cert = vec![rustls::Certificate(cert_der.clone())];
let mut server_crypto = rustls::ServerConfig::builder()
.with_safe_defaults()
.with_no_client_auth()
.with_single_cert(cert, key)?;
server_crypto.alpn_protocols = ALPN_QUIC_HTTP.iter().map(|&x| x.into()).collect();
Ok(())
}
#[allow(unused)]
pub const ALPN_QUIC_HTTP: &[&[u8]] = &[b"hq-29"];
