129 lines
3.0 KiB
Rust
129 lines
3.0 KiB
Rust
use tokio::{
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net::TcpListener,
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};
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use quic_demo::prelude::*;
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#[tokio::main]
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async fn main () -> anyhow::Result <()> {
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tracing_subscriber::fmt::init ();
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let server_cert = tokio::fs::read ("quic_server.crt").await?;
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let server_addr = "127.0.0.1:30380".parse ()?;
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let endpoint = make_client_endpoint ("0.0.0.0:0".parse ()?, &[&server_cert])?;
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debug! ("Connecting to relay server");
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let quinn::NewConnection {
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connection,
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..
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} = endpoint.connect (&server_addr, "localhost")?.await?;
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let (mut send, mut recv) = connection.open_bi ().await?;
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let req_buf = [2u8, 42, 0, 0];
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send.write_all (&req_buf).await?;
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let mut resp_buf = [0u8, 0, 0, 0];
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recv.read_exact (&mut resp_buf).await?;
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let listener = TcpListener::bind ("127.0.0.1:30381").await?;
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debug! ("Accepting local TCP connections from P1");
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loop {
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let (tcp_socket, _) = listener.accept ().await?;
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let connection = connection.clone ();
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tokio::spawn (async move {
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let (local_recv, local_send) = tcp_socket.into_split ();
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debug! ("Connecting to end server");
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let (mut relay_send, mut relay_recv) = connection.open_bi ().await?;
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let req_buf = [1, 43, 0, 0, 1, 0, 0, 0];
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relay_send.write_all (&req_buf).await?;
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let mut resp_buf = [0; 8];
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relay_recv.read_exact (&mut resp_buf).await?;
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debug! ("Relaying bytes...");
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let ptth_conn = PtthNewConnection {
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local_send,
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local_recv,
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relay_send,
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relay_recv,
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}.build ();
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ptth_conn.uplink_task.await??;
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ptth_conn.downlink_task.await??;
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Ok::<_, anyhow::Error> (())
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});
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}
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}
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struct PtthNewConnection {
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local_send: tokio::net::tcp::OwnedWriteHalf,
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local_recv: tokio::net::tcp::OwnedReadHalf,
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relay_send: quinn::SendStream,
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relay_recv: quinn::RecvStream,
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}
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struct PtthConnection {
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uplink_task: JoinHandle <anyhow::Result <()>>,
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downlink_task: JoinHandle <anyhow::Result <()>>,
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}
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impl PtthNewConnection {
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fn build (self) -> PtthConnection {
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let Self {
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mut local_send,
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mut local_recv,
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mut relay_send,
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mut relay_recv,
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} = self;
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let uplink_task = tokio::spawn (async move {
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// Uplink - local client to relay server
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let mut buf = vec! [0u8; 65_536];
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loop {
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let bytes_read = local_recv.read (&mut buf).await?;
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if bytes_read == 0 {
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break;
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}
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let buf_slice = &buf [0..bytes_read];
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debug! ("Uplink relaying {} bytes", bytes_read);
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relay_send.write_all (buf_slice).await?;
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}
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debug! ("Uplink closed");
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Ok::<_, anyhow::Error> (())
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});
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let downlink_task = tokio::spawn (async move {
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// Downlink - Relay server to local client
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let mut buf = vec! [0u8; 65_536];
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while let Some (bytes_read) = relay_recv.read (&mut buf).await? {
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let buf_slice = &buf [0..bytes_read];
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debug! ("Downlink relaying {} bytes", bytes_read);
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local_send.write_all (buf_slice).await?;
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}
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debug! ("Downlink closed");
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Ok::<_, anyhow::Error> (())
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});
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PtthConnection {
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uplink_task,
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downlink_task,
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}
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}
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}
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