feat(http-proxy): support non HTTP CONNECT method for non TLS connection

Cargo.lock

@@ -3943,6 +3943,7 @@ dependencies = [
  "get_if_addrs",
  "hickory-resolver",
  "http-body-util",
+ "httparse",
  "hyper",
  "hyper-util",
  "ipnet",

wstunnel/Cargo.toml

@@ -36,6 +36,7 @@ nix = { version = "0.30.1", features = ["socket", "net", "uio"] }
 parking_lot = "0.12.4"
 pin-project = "1"
 notify = { version = "8.0.0", features = [] }
+httparse = { version = "1.10.1", features = [] }
 
 rustls-native-certs = { version = "0.8.1", features = [] }
 rustls-pemfile = { version = "2.2.0", features = [] }

wstunnel/src/config.rs

@@ -539,10 +539,7 @@ mod parsers {
         let get_proxy_protocol = |options: &BTreeMap<String, String>| options.contains_key("proxy_protocol");
 
         let Some((proto, tunnel_info)) = arg.split_once("://") else {
-            return Err(Error::new(
-                ErrorKind::InvalidInput,
-                format!("cannot parse protocol from {arg}"),
-            ));
+            return Err(Error::new(ErrorKind::InvalidInput, format!("cannot parse protocol from {arg}")));
         };
 
         match proto {
@@ -689,10 +686,7 @@ mod parsers {
     pub fn parse_sni_override(arg: &str) -> Result<DnsName<'static>, io::Error> {
         match DnsName::try_from(arg.to_string()) {
             Ok(val) => Ok(val),
-            Err(err) => Err(io::Error::new(
-                ErrorKind::InvalidInput,
-                format!("Invalid sni override: {err}"),
-            )),
+            Err(err) => Err(io::Error::new(ErrorKind::InvalidInput, format!("Invalid sni override: {err}"))),
         }
     }
 

wstunnel/src/protocols/http_proxy/server.rs

@@ -3,7 +3,7 @@ use std::future::Future;
 
 use bytes::Bytes;
 use log::{debug, error};
-use std::net::SocketAddr;
+use std::net::{Ipv4Addr, SocketAddr};
 use std::pin::Pin;
 use std::sync::Arc;
 
@@ -21,7 +21,7 @@ use tokio::net::{TcpListener, TcpStream};
 use tokio::select;
 use tokio::task::JoinSet;
 use tracing::log::info;
-use url::Host;
+use url::{Host, Url};
 
 #[allow(clippy::type_complexity)]
 pub struct HttpProxyListener {
@@ -36,7 +36,7 @@ impl Stream for HttpProxyListener {
     }
 }
 
-fn handle_request(
+fn handle_http_connect_request(
     credentials: &Option<String>,
     dest: &Mutex<Option<(Host, u16)>>,
     req: Request<Incoming>,
@@ -81,9 +81,7 @@ pub async fn run_server(
     timeout: Option<Duration>,
     credentials: Option<(String, String)>,
 ) -> Result<HttpProxyListener, anyhow::Error> {
-    info!(
-        "Starting http proxy server listening cnx on {bind} with credentials {credentials:?}"
-    );
+    info!("Starting http proxy server listening cnx on {bind} with credentials {credentials:?}");
 
     let listener = TcpListener::bind(bind)
         .await
@@ -140,12 +138,37 @@ pub async fn run_server(
             let handle_new_cnx = {
                 let proxy_cfg = proxy_cfg.clone();
                 async move {
+                    // We need to know if the http request if a CONNECT method or a regular one.
+                    // HTTP CONNECT requires doing a handshake with client (which is easier)
+                    // While for regular method, we need to replay the request as if it was done by the client.
+                    // Non HTTP CONNECT method only works for non TLS connection/request.
+                    let forward_to = {
+                        let mut buf = [0; 512];
+                        let buf_size = stream.peek(&mut buf).await.ok()?;
+                        let mut http_parser = httparse::Request::new(&mut []);
+
+                        let _ = http_parser.parse(&buf[..buf_size]);
+                        if http_parser.method == Some(hyper::Method::CONNECT.as_str()) {
+                            None
+                        } else {
+                            let url = Url::parse(http_parser.path.unwrap_or("")).ok()?;
+                            let host = url.host().unwrap_or(Host::Ipv4(Ipv4Addr::UNSPECIFIED)).to_owned();
+                            let port = url.port_or_known_default().unwrap_or(80);
+                            Some((host, port))
+                        }
+                    };
+
+                    // Handle regular http request. Meaning we need to forward it directly as is
+                    return if forward_to.is_some() {
+                        Some((stream, forward_to))
+                    } else {
+                        // Handle HTTP CONNECT request
                         let http1 = &proxy_cfg.1;
                         let auth_header = &proxy_cfg.0;
                         let forward_to = Mutex::new(None);
                         let conn_fut = http1.serve_connection(
                             hyper_util::rt::TokioIo::new(&mut stream),
-                        service_fn(|req| handle_request(auth_header, &forward_to, req)),
+                            service_fn(|req| handle_http_connect_request(auth_header, &forward_to, req)),
                         );
 
                         match conn_fut.await {
@@ -155,6 +178,7 @@ pub async fn run_server(
                                 None
                             }
                         }
+                    };
                 }
             };
             tasks.spawn(handle_new_cnx);

wstunnel/src/protocols/unix_sock/server.rs

@@ -51,8 +51,8 @@ pub async fn run_server(socket_path: &Path) -> Result<UnixListenerStream, anyhow
     info!("Starting Unix socket server listening cnx on {socket_path:?}");
 
     let path_to_delete = !socket_path.exists();
-    let listener = UnixListener::bind(socket_path)
-        .with_context(|| format!("Cannot create Unix socket server {socket_path:?}"))?;
+    let listener =
+        UnixListener::bind(socket_path).with_context(|| format!("Cannot create Unix socket server {socket_path:?}"))?;
 
     Ok(UnixListenerStream::new(listener, path_to_delete))
 }

wstunnel/src/restrictions/types.rs

@@ -129,9 +129,7 @@ where
         .map(|port_mapping| {
             let port_mapping_parts: Vec<&str> = port_mapping.split(':').collect();
             if port_mapping_parts.len() != 2 {
-                Err(serde::de::Error::custom(format!(
-                    "Invalid port_mapping entry: {port_mapping}"
-                )))
+                Err(serde::de::Error::custom(format!("Invalid port_mapping entry: {port_mapping}")))
             } else {
                 let orig_port = port_mapping_parts[0].parse::<u16>().map_err(serde::de::Error::custom)?;
                 let target_port = port_mapping_parts[1].parse::<u16>().map_err(serde::de::Error::custom)?;