Refacto: merge http2 and websocket request handling

src/tunnel/server/handler_http2.rs

@@ -5,6 +5,7 @@ use crate::tunnel::server::utils::{
 use crate::tunnel::server::WsServer;
 use crate::tunnel::transport::http2::{Http2TunnelRead, Http2TunnelWrite};
 use crate::tunnel::{transport, RemoteAddr};
+use crate::LocalProtocol;
 use bytes::Bytes;
 use futures_util::StreamExt;
 use http_body_util::combinators::BoxBody;
@@ -13,7 +14,9 @@ use hyper::body::{Frame, Incoming};
 use hyper::header::CONTENT_TYPE;
 use hyper::{http, Request, Response, StatusCode};
 use std::net::SocketAddr;
+use std::pin::Pin;
 use std::sync::Arc;
+use tokio::io::{AsyncRead, AsyncWrite};
 use tokio::sync::{mpsc, oneshot};
 use tokio_stream::wrappers::ReceiverStream;
 use tracing::{info, warn, Instrument, Span};
@@ -22,77 +25,14 @@ pub(super) async fn http_server_upgrade(
     server: WsServer,
     restrictions: Arc<RestrictionsRules>,
     restrict_path_prefix: Option<String>,
-    mut client_addr: SocketAddr,
+    client_addr: SocketAddr,
     mut req: Request<Incoming>,
 ) -> Response<Either<String, BoxBody<Bytes, anyhow::Error>>> {
-    match extract_x_forwarded_for(&req) {
-        Ok(Some((x_forward_for, x_forward_for_str))) => {
-            info!("Request X-Forwarded-For: {:?}", x_forward_for);
-            Span::current().record("forwarded_for", x_forward_for_str);
-            client_addr.set_ip(x_forward_for);
-        }
-        Ok(_) => {}
-        Err(err) => return err.map(Either::Left),
-    };
-
-    let path_prefix = match extract_path_prefix(&req) {
-        Ok(p) => p,
-        Err(err) => return err.map(Either::Left),
-    };
-
-    if let Some(restrict_path) = restrict_path_prefix {
-        if path_prefix != restrict_path {
-            warn!(
-                "Client requested upgrade path '{}' does not match upgrade path restriction '{}' (mTLS, etc.)",
-                path_prefix, restrict_path
-            );
-            return http::Response::builder()
-                .status(StatusCode::BAD_REQUEST)
-                .body(Either::Left("Invalid upgrade request".to_string()))
-                .unwrap();
-        }
-    }
-
-    let jwt = match extract_tunnel_info(&req) {
-        Ok(jwt) => jwt,
-        Err(err) => return err.map(Either::Left),
-    };
-
-    Span::current().record("id", &jwt.claims.id);
-    Span::current().record("remote", format!("{}:{}", jwt.claims.r, jwt.claims.rp));
-    let remote = match RemoteAddr::try_from(jwt.claims) {
-        Ok(remote) => remote,
-        Err(err) => {
-            warn!("Rejecting connection with bad tunnel info: {} {}", err, req.uri());
-            return http::Response::builder()
-                .status(StatusCode::BAD_REQUEST)
-                .body(Either::Left("Invalid upgrade request".to_string()))
-                .unwrap();
-        }
-    };
-
-    let restriction = match validate_tunnel(&remote, path_prefix, &restrictions) {
-        Ok(matched_restriction) => {
-            info!("Tunnel accepted due to matched restriction: {}", matched_restriction.name);
-            matched_restriction
-        }
-        Err(err) => return err.map(Either::Left),
-    };
-
-    let req_protocol = remote.protocol.clone();
-    let tunnel = match server.run_tunnel(restriction, remote, client_addr).await {
-        Ok(ret) => ret,
-        Err(err) => {
-            warn!("Rejecting connection with bad upgrade request: {} {}", err, req.uri());
-            return http::Response::builder()
-                .status(StatusCode::BAD_REQUEST)
-                .body(Either::Left("Invalid upgrade request".to_string()))
-                .unwrap();
-        }
-    };
-
-    let (remote_addr, local_rx, local_tx) = tunnel;
-    info!("connected to {:?} {}:{}", req_protocol, remote_addr.host, remote_addr.port);
+    let (remote_addr, local_rx, local_tx, need_cookie) =
+        match exec_tunnel_request(server, restrictions, restrict_path_prefix, client_addr, &req).await {
+            Ok(ret) => ret,
+            Err(err) => return err,
+        };
 
     let req_content_type = req.headers_mut().remove(CONTENT_TYPE);
     let ws_rx = BodyStream::new(req.into_body());
@@ -120,8 +60,10 @@ pub(super) async fn http_server_upgrade(
         .instrument(Span::current()),
     );
 
-    if let Err(response) = inject_cookie(&req_protocol, &mut response, &remote_addr, Either::Left) {
-        return response;
+    if need_cookie {
+        if let Err(response) = inject_cookie(&mut response, &remote_addr, Either::Left) {
+            return response;
+        }
     }
 
     if let Some(content_type) = req_content_type {
@@ -130,3 +72,93 @@ pub(super) async fn http_server_upgrade(
 
     response
 }
+
+pub(super) async fn exec_tunnel_request(
+    server: WsServer,
+    restrictions: Arc<RestrictionsRules>,
+    restrict_path_prefix: Option<String>,
+    mut client_addr: SocketAddr,
+    req: &Request<Incoming>,
+) -> Result<
+    (
+        RemoteAddr,
+        Pin<Box<dyn AsyncRead + Send>>,
+        Pin<Box<dyn AsyncWrite + Send>>,
+        bool,
+    ),
+    Response<Either<String, BoxBody<Bytes, anyhow::Error>>>,
+> {
+    match extract_x_forwarded_for(req) {
+        Ok(Some((x_forward_for, x_forward_for_str))) => {
+            info!("Request X-Forwarded-For: {:?}", x_forward_for);
+            Span::current().record("forwarded_for", x_forward_for_str);
+            client_addr.set_ip(x_forward_for);
+        }
+        Ok(_) => {}
+        Err(err) => return Err(err.map(Either::Left)),
+    };
+
+    let path_prefix = match extract_path_prefix(req) {
+        Ok(p) => p,
+        Err(err) => return Err(err.map(Either::Left)),
+    };
+
+    if let Some(restrict_path) = restrict_path_prefix {
+        if path_prefix != restrict_path {
+            warn!(
+                "Client requested upgrade path '{}' does not match upgrade path restriction '{}' (mTLS, etc.)",
+                path_prefix, restrict_path
+            );
+            return Err(http::Response::builder()
+                .status(StatusCode::BAD_REQUEST)
+                .body(Either::Left("Invalid upgrade request".to_string()))
+                .unwrap());
+        }
+    }
+
+    let jwt = match extract_tunnel_info(req) {
+        Ok(jwt) => jwt,
+        Err(err) => return Err(err.map(Either::Left)),
+    };
+
+    Span::current().record("id", &jwt.claims.id);
+    Span::current().record("remote", format!("{}:{}", jwt.claims.r, jwt.claims.rp));
+    let remote = match RemoteAddr::try_from(jwt.claims) {
+        Ok(remote) => remote,
+        Err(err) => {
+            warn!("Rejecting connection with bad tunnel info: {} {}", err, req.uri());
+            return Err(http::Response::builder()
+                .status(StatusCode::BAD_REQUEST)
+                .body(Either::Left("Invalid upgrade request".to_string()))
+                .unwrap());
+        }
+    };
+
+    let restriction = match validate_tunnel(&remote, path_prefix, &restrictions) {
+        Ok(matched_restriction) => {
+            info!("Tunnel accepted due to matched restriction: {}", matched_restriction.name);
+            matched_restriction
+        }
+        Err(err) => return Err(err.map(Either::Left)),
+    };
+
+    let req_protocol = remote.protocol.clone();
+    let inject_cookie = matches!(
+        req_protocol,
+        LocalProtocol::ReverseSocks5 { .. } | LocalProtocol::ReverseHttpProxy { .. }
+    );
+    let tunnel = match server.run_tunnel(restriction, remote, client_addr).await {
+        Ok(ret) => ret,
+        Err(err) => {
+            warn!("Rejecting connection with bad upgrade request: {} {}", err, req.uri());
+            return Err(http::Response::builder()
+                .status(StatusCode::BAD_REQUEST)
+                .body(Either::Left("Invalid upgrade request".to_string()))
+                .unwrap());
+        }
+    };
+
+    let (remote_addr, local_rx, local_tx) = tunnel;
+    info!("connected to {:?} {}:{}", req_protocol, remote_addr.host, remote_addr.port);
+    Ok((remote_addr, local_rx, local_tx, inject_cookie))
+}

src/tunnel/server/handler_websocket.rs

@@ -1,109 +1,49 @@
 use crate::restrictions::types::RestrictionsRules;
-use crate::tunnel::server::utils::{
-    extract_path_prefix, extract_tunnel_info, extract_x_forwarded_for, inject_cookie, validate_tunnel,
-};
+use crate::tunnel::server::handler_http2::exec_tunnel_request;
+use crate::tunnel::server::utils::inject_cookie;
 use crate::tunnel::server::WsServer;
+use crate::tunnel::transport;
 use crate::tunnel::transport::websocket::{WebsocketTunnelRead, WebsocketTunnelWrite};
-use crate::tunnel::{transport, RemoteAddr};
+use bytes::Bytes;
+use http_body_util::combinators::BoxBody;
+use http_body_util::Either;
 use hyper::body::Incoming;
 use hyper::header::{HeaderValue, SEC_WEBSOCKET_PROTOCOL};
 use hyper::{http, Request, Response, StatusCode};
 use std::net::SocketAddr;
 use std::sync::Arc;
 use tokio::sync::oneshot;
-use tracing::{error, info, warn, Instrument, Span};
+use tracing::{error, warn, Instrument, Span};
 
 pub(super) async fn ws_server_upgrade(
     server: WsServer,
     restrictions: Arc<RestrictionsRules>,
     restrict_path_prefix: Option<String>,
-    mut client_addr: SocketAddr,
+    client_addr: SocketAddr,
     mut req: Request<Incoming>,
-) -> Response<String> {
+) -> Response<Either<String, BoxBody<Bytes, anyhow::Error>>> {
     if !fastwebsockets::upgrade::is_upgrade_request(&req) {
         warn!("Rejecting connection with bad upgrade request: {}", req.uri());
         return http::Response::builder()
             .status(StatusCode::BAD_REQUEST)
-            .body("Invalid upgrade request".to_string())
+            .body(Either::Left("Invalid upgrade request".to_string()))
             .unwrap();
     }
 
-    match extract_x_forwarded_for(&req) {
-        Ok(Some((x_forward_for, x_forward_for_str))) => {
-            info!("Request X-Forwarded-For: {:?}", x_forward_for);
-            Span::current().record("forwarded_for", x_forward_for_str);
-            client_addr.set_ip(x_forward_for);
-        }
-        Ok(_) => {}
-        Err(err) => return err,
-    };
+    let mask_frame = server.config.websocket_mask_frame;
+    let (remote_addr, local_rx, local_tx, need_cookie) =
+        match exec_tunnel_request(server, restrictions, restrict_path_prefix, client_addr, &req).await {
+            Ok(ret) => ret,
+            Err(err) => return err,
+        };
 
-    let path_prefix = match extract_path_prefix(&req) {
-        Ok(p) => p,
-        Err(err) => return err,
-    };
-
-    if let Some(restrict_path) = restrict_path_prefix {
-        if path_prefix != restrict_path {
-            warn!(
-                "Client requested upgrade path '{}' does not match upgrade path restriction '{}' (mTLS, etc.)",
-                path_prefix, restrict_path
-            );
-            return http::Response::builder()
-                .status(StatusCode::BAD_REQUEST)
-                .body("Invalid upgrade request".to_string())
-                .unwrap();
-        }
-    }
-
-    let jwt = match extract_tunnel_info(&req) {
-        Ok(jwt) => jwt,
-        Err(err) => return err,
-    };
-
-    Span::current().record("id", &jwt.claims.id);
-    Span::current().record("remote", format!("{}:{}", jwt.claims.r, jwt.claims.rp));
-
-    let remote = match RemoteAddr::try_from(jwt.claims) {
-        Ok(remote) => remote,
-        Err(err) => {
-            warn!("Rejecting connection with bad tunnel info: {} {}", err, req.uri());
-            return http::Response::builder()
-                .status(StatusCode::BAD_REQUEST)
-                .body("Invalid upgrade request".to_string())
-                .unwrap();
-        }
-    };
-
-    let restriction = match validate_tunnel(&remote, path_prefix, &restrictions) {
-        Ok(matched_restriction) => {
-            info!("Tunnel accepted due to matched restriction: {}", matched_restriction.name);
-            matched_restriction
-        }
-        Err(err) => return err,
-    };
-
-    let req_protocol = remote.protocol.clone();
-    let tunnel = match server.run_tunnel(restriction, remote, client_addr).await {
-        Ok(ret) => ret,
-        Err(err) => {
-            warn!("Rejecting connection with bad upgrade request: {} {}", err, req.uri());
-            return http::Response::builder()
-                .status(StatusCode::BAD_REQUEST)
-                .body("Invalid upgrade request".to_string())
-                .unwrap();
-        }
-    };
-
-    let (remote_addr, local_rx, local_tx) = tunnel;
-    info!("connected to {:?} {}:{}", req_protocol, remote_addr.host, remote_addr.port);
     let (response, fut) = match fastwebsockets::upgrade::upgrade(&mut req) {
         Ok(ret) => ret,
         Err(err) => {
             warn!("Rejecting connection with bad upgrade request: {} {}", err, req.uri());
             return http::Response::builder()
                 .status(StatusCode::BAD_REQUEST)
-                .body(format!("Invalid upgrade request: {:?}", err))
+                .body(Either::Left(format!("Invalid upgrade request: {:?}", err)))
                 .unwrap();
         }
     };
@@ -118,7 +58,7 @@ pub(super) async fn ws_server_upgrade(
                 }
             };
             let (close_tx, close_rx) = oneshot::channel::<()>();
-            ws_tx.set_auto_apply_mask(server.config.websocket_mask_frame);
+            ws_tx.set_auto_apply_mask(mask_frame);
 
             tokio::task::spawn(
                 transport::io::propagate_remote_to_local(local_tx, WebsocketTunnelRead::new(ws_rx), close_rx)
@@ -132,9 +72,11 @@ pub(super) async fn ws_server_upgrade(
         .instrument(Span::current()),
     );
 
-    let mut response = Response::from_parts(response.into_parts().0, "".to_string());
-    if let Err(response) = inject_cookie(&req_protocol, &mut response, &remote_addr, |s| s) {
-        return response;
+    let mut response = Response::from_parts(response.into_parts().0, Either::Right(BoxBody::default()));
+    if need_cookie {
+        if let Err(response) = inject_cookie(&mut response, &remote_addr, Either::Left) {
+            return response;
+        }
     }
 
     response

src/tunnel/server/server.rs

@@ -258,7 +258,7 @@ impl WsServer {
                 async move {
                     if fastwebsockets::upgrade::is_upgrade_request(&req) {
                         ws_server_upgrade(server.clone(), restrictions.clone(), restrict_path, client_addr, req)
-                            .map(|response| Ok::<_, anyhow::Error>(response.map(Either::Left)))
+                            .map::<anyhow::Result<_>, _>(Ok)
                             .await
                     } else if req.version() == Version::HTTP_2 {
                         http_server_upgrade(

src/tunnel/server/utils.rs

@@ -2,7 +2,6 @@ use crate::restrictions::types::{
     AllowConfig, MatchConfig, RestrictionConfig, RestrictionsRules, ReverseTunnelConfigProtocol, TunnelConfigProtocol,
 };
 use crate::tunnel::{tunnel_to_jwt_token, JwtTunnelConfig, RemoteAddr, JWT_DECODE, JWT_HEADER_PREFIX};
-use crate::LocalProtocol;
 use hyper::body::{Body, Incoming};
 use hyper::header::{HeaderValue, COOKIE, SEC_WEBSOCKET_PROTOCOL};
 use hyper::{http, Request, Response, StatusCode};
@@ -216,7 +215,6 @@ pub(super) fn validate_tunnel<'a>(
 }
 
 pub(super) fn inject_cookie<B>(
-    req_protocol: &LocalProtocol,
     response: &mut http::Response<B>,
     remote_addr: &RemoteAddr,
     mk_body: impl FnOnce(String) -> B,
@@ -224,19 +222,14 @@ pub(super) fn inject_cookie<B>(
 where
     B: Body,
 {
-    if matches!(
-        req_protocol,
-        LocalProtocol::ReverseSocks5 { .. } | LocalProtocol::ReverseHttpProxy { .. }
-    ) {
-        let Ok(header_val) = HeaderValue::from_str(&tunnel_to_jwt_token(Uuid::from_u128(0), remote_addr)) else {
-            error!("Bad header value for reverse socks5: {} {}", remote_addr.host, remote_addr.port);
-            return Err(http::Response::builder()
-                .status(StatusCode::BAD_REQUEST)
-                .body(mk_body("Invalid upgrade request".to_string()))
-                .unwrap());
-        };
-        response.headers_mut().insert(COOKIE, header_val);
-    }
+    let Ok(header_val) = HeaderValue::from_str(&tunnel_to_jwt_token(Uuid::from_u128(0), remote_addr)) else {
+        error!("Bad header value for reverse socks5: {} {}", remote_addr.host, remote_addr.port);
+        return Err(http::Response::builder()
+            .status(StatusCode::BAD_REQUEST)
+            .body(mk_body("Invalid upgrade request".to_string()))
+            .unwrap());
+    };
+    response.headers_mut().insert(COOKIE, header_val);
 
     Ok(())
 }