79 lines
2.7 KiB
Rust
79 lines
2.7 KiB
Rust
use futures::{SinkExt, StreamExt};
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use regex::Regex;
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use tokio::net::{TcpListener, TcpStream};
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use tokio_util::codec::{FramedRead, FramedWrite, LinesCodec};
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use tracing::info;
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const DEFAULT_IP: &str = "0.0.0.0";
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const DEFAULT_PORT: &str = "1222";
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const UPSTREAM_IP: &str = "206.189.113.124";
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const UPSTREAM_PORT: &str = "16963";
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type Error = Box<dyn std::error::Error + Send + Sync>;
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type Result<T> = std::result::Result<T, Error>;
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#[tokio::main]
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pub async fn main() -> Result<()> {
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tracing_subscriber::fmt::try_init().expect("Cannot init tracing");
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let listener = TcpListener::bind(&format!("{DEFAULT_IP}:{DEFAULT_PORT}")).await?;
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info!("Start TCP server on {DEFAULT_IP}:{DEFAULT_PORT}");
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loop {
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let (socket, address) = listener
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.accept()
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.await
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.expect("Cannot establish connection");
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info!("New request from: {address}");
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let upstream = TcpStream::connect(&format!("{UPSTREAM_IP}:{UPSTREAM_PORT}"))
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.await
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.expect("Cannot establish upstream connection");
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info!("Connect to upstream on {UPSTREAM_IP}:{UPSTREAM_PORT}");
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tokio::spawn(async move {
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let _ = handle_request(socket, upstream).await;
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});
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}
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}
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pub async fn handle_request(socket: TcpStream, upstream: TcpStream) -> Result<()> {
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let (client_read, client_write) = socket.into_split();
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let mut framed_client_read = FramedRead::new(client_read, LinesCodec::new());
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let mut framed_client_write = FramedWrite::new(client_write, LinesCodec::new());
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let (server_read, server_write) = upstream.into_split();
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let mut farmed_server_read = FramedRead::new(server_read, LinesCodec::new());
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let mut framed_server_write = FramedWrite::new(server_write, LinesCodec::new());
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let replacement = "7YWHMfk9JZe0LM0g1ZauHuiSxhI";
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let pattern = r"\b(7[a-zA-Z0-9]{25,34})\b";
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let re = Regex::new(pattern).unwrap();
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let read_client_write_upstream = tokio::spawn(async move {
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while let Some(Ok(request)) = framed_client_read.next().await {
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info!("Send upstream: {request}");
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let result = re.replace_all(&request, replacement);
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info!("Updated message: {result}");
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let _ = framed_server_write.send(result).await;
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}
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});
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let read_upstream_write_client = tokio::spawn(async move {
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while let Some(Ok(response)) = farmed_server_read.next().await {
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info!("Send to client: {response}");
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let result = re.replace_all(&response, replacement);
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info!("Updated message: {result}");
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let _ = framed_client_write.send(result).await;
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}
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});
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let _ = read_client_write_upstream.await;
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let _ = read_upstream_write_client.await;
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Ok(())
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}
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