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|
pub mod config;
use anyhow::bail;
use azalea_protocol::packets::handshake::ServerboundHandshakePacket;
use azalea_protocol::packets::login::ServerboundLoginPacket;
use azalea_protocol::packets::ConnectionProtocol;
use azalea_protocol::read::read_packet;
use azalea_protocol::write::write_packet;
use bytes::BytesMut;
use config::Config;
use log::{error, info, warn};
use std::fs::read_to_string;
use std::net::SocketAddr;
use std::sync::Arc;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::net::tcp::{OwnedReadHalf, OwnedWriteHalf};
use tokio::net::{TcpListener, TcpStream};
#[tokio::main]
async fn main() {
env_logger::init_from_env("LOG");
let config =
Arc::new(serde_yaml::from_str::<Config>(&read_to_string("proxy.yaml").unwrap()).unwrap());
let listener = TcpListener::bind("127.0.0.1:25565").await.unwrap();
info!("listening");
loop {
match listener.accept().await {
Ok((sock, addr)) => {
let config = config.clone();
tokio::spawn(async move {
match handle_client(config, sock, addr).await {
Ok(()) => (),
Err(e) => warn!("{e}"),
}
});
}
Err(e) => error!("{}", e),
}
}
}
async fn handle_client(
config: Arc<Config>,
sock: TcpStream,
addr: SocketAddr,
) -> anyhow::Result<()> {
info!("connection {addr}");
let mut buf = BytesMut::new();
let (mut downstream_reader, downstream_writer) = sock.into_split();
let handshake = read_packet::<ServerboundHandshakePacket, _>(
&mut downstream_reader,
&mut buf,
None,
&mut None,
)
.await?;
let upstream_handshake = match handshake {
ServerboundHandshakePacket::ClientIntention(p) => {
info!(
"new client (version={}, intent={:?})",
p.protocol_version, p.intention
);
match p.intention {
ConnectionProtocol::Status => {
bail!("we dont support ping yet")
}
ConnectionProtocol::Login => {}
_ => bail!("invalid intent"),
}
p
}
};
let login =
read_packet::<ServerboundLoginPacket, _>(&mut downstream_reader, &mut buf, None, &mut None)
.await?;
let upstream_login = match login {
ServerboundLoginPacket::Hello(mut p) => {
info!("client hello (username={:?})", p.username);
let profile = config
.whitelist
.iter()
.find(|e| e.token.as_ref().map_or(false, |e| e == &p.username));
match profile {
Some(profile) => {
warn!("auth as {}", profile.username);
p.username = profile.username.clone();
}
None => {
warn!("no profile found, disconnecting client");
return Ok(());
}
}
p
}
ServerboundLoginPacket::Key(_) => bail!("key not supported"),
ServerboundLoginPacket::CustomQuery(_) => bail!("custom query not supported"),
};
let upstream = TcpStream::connect("127.0.0.1:25567").await?;
let (upstream_reader, mut upstream_writer) = upstream.into_split();
write_packet(
&ServerboundHandshakePacket::ClientIntention(upstream_handshake),
&mut upstream_writer,
None,
&mut None,
)
.await?;
write_packet::<ServerboundLoginPacket, _>(
&ServerboundLoginPacket::Hello(upstream_login),
&mut upstream_writer,
None,
&mut None,
)
.await?;
tokio::spawn(async move {
connect(downstream_writer, upstream_reader).await.unwrap();
});
connect(upstream_writer, downstream_reader).await?;
Ok(())
// for _ in 0..3 {
// let a = read_packet::<ClientboundLoginPacket, _>(
// &mut upstream_reader,
// &mut buf,
// None,
// &mut None,
// )
// .await?;
// debug!("login {a:?}");
// write_packet(&a, &mut downstream_writer, None, &mut None).await?;
// }
// tokio::spawn(async move {
// let mut buf = BytesMut::new();
// loop {
// let a = read_packet::<ClientboundGamePacket, _>(
// &mut upstream_reader,
// &mut buf,
// None,
// &mut None,
// )
// .await
// .unwrap();
// debug!("downstream {a:?}");
// write_packet(&a, &mut downstream_writer, None, &mut None)
// .await
// .unwrap();
// }
// });
// loop {
// let a = read_packet::<ClientboundGamePacket, _>(
// &mut downstream_reader,
// &mut buf,
// None,
// &mut None,
// )
// .await?;
// debug!("upstream {a:?}");
// write_packet(&a, &mut upstream_writer, None, &mut None).await?;
// }
}
async fn connect(mut writer: OwnedWriteHalf, mut reader: OwnedReadHalf) -> anyhow::Result<()> {
let mut buf = [0; 1024];
loop {
let size = reader.read(&mut buf).await?;
writer.write_all(&buf[..size]).await?;
}
}
|
