Use HTTP proxy if configured for socks5

src/tunnel/connectors/mod.rs

@@ -1,3 +1,4 @@
+use anyhow::anyhow;
 use tokio::io::{AsyncRead, AsyncWrite};
 use url::Url;
 
@@ -18,7 +19,11 @@ pub trait TunnelConnector {
     async fn connect(&self, remote: &Option<RemoteAddr>) -> anyhow::Result<(Self::Reader, Self::Writer)>;
     async fn connect_with_http_proxy(
         &self,
-        proxy: &Url,
-        remote: &Option<RemoteAddr>,
-    ) -> anyhow::Result<(Self::Reader, Self::Writer)>;
+        _proxy: &Url,
+        _remote: &Option<RemoteAddr>,
+    ) -> anyhow::Result<(Self::Reader, Self::Writer)> {
+        Err(anyhow!(
+            "Requested to use HTTP Proxy to connect but it is not supported with this connector"
+        ))
+    }
 }

src/tunnel/connectors/sock5.rs

@@ -65,10 +65,29 @@ impl TunnelConnector for Socks5TunnelConnector<'_> {
 
     async fn connect_with_http_proxy(
         &self,
-        _proxy: &Url,
-        _remote: &Option<RemoteAddr>,
+        proxy: &Url,
+        remote: &Option<RemoteAddr>,
     ) -> anyhow::Result<(Self::Reader, Self::Writer)> {
-        Err(anyhow!("SOCKS5 tunneling is not supported with HTTP proxy"))
+        let Some(remote) = remote else {
+            return Err(anyhow!("Missing remote destination for reverse socks5"));
+        };
+
+        match remote.protocol {
+            LocalProtocol::Tcp { proxy_protocol: _ } => {
+                let stream = protocols::tcp::connect_with_http_proxy(
+                    proxy,
+                    &remote.host,
+                    remote.port,
+                    self.so_mark,
+                    self.connect_timeout,
+                    self.dns_resolver,
+                )
+                .await?;
+                let (reader, writer) = stream.into_split();
+                Ok((Socks5Reader::Tcp(reader), Socks5Writer::Tcp(writer)))
+            }
+            _ => Err(anyhow!("Socks5 UDP cannot use http proxy to connect to destination")),
+        }
     }
 }
 

src/tunnel/connectors/udp.rs

@@ -1,7 +1,6 @@
 use std::time::Duration;
 
-use anyhow::anyhow;
-use url::{Host, Url};
+use url::Host;
 
 use crate::protocols;
 use crate::protocols::dns::DnsResolver;
@@ -46,12 +45,4 @@ impl TunnelConnector for UdpTunnelConnector<'_> {
 
         Ok((stream.clone(), stream))
     }
-
-    async fn connect_with_http_proxy(
-        &self,
-        _proxy: &Url,
-        _remote: &Option<RemoteAddr>,
-    ) -> anyhow::Result<(Self::Reader, Self::Writer)> {
-        Err(anyhow!("UDP tunneling is not supported with HTTP proxy"))
-    }
 }

src/tunnel/server/reverse_tunnel.rs

@@ -1,6 +1,6 @@
 use crate::tunnel::listeners::TunnelListener;
 use crate::tunnel::RemoteAddr;
-use ahash::{AHashMap};
+use ahash::AHashMap;
 use anyhow::anyhow;
 use futures_util::{pin_mut, StreamExt};
 use log::warn;