Fix binding interface when no TLS is used (seanmonstar#2200)

Author: yujincheng08

src/async_impl/client.rs

@@ -470,12 +470,6 @@ impl ClientBuilder {
                             config.quic_receive_window,
                             config.quic_send_window,
                             config.local_address,
-                            #[cfg(any(
-                                target_os = "android",
-                                target_os = "fuchsia",
-                                target_os = "linux"
-                            ))]
-                            config.interface.as_deref(),
                             &config.http_version_pref,
                         )?;
                     }
@@ -641,7 +635,14 @@ impl ClientBuilder {
             }
 
             #[cfg(not(feature = "__tls"))]
-            Connector::new(http, proxies.clone(), config.local_address, config.nodelay)
+            Connector::new(
+                http,
+                proxies.clone(),
+                config.local_address,
+                #[cfg(any(target_os = "android", target_os = "fuchsia", target_os = "linux"))]
+                config.interface.as_deref(),
+                config.nodelay,
+            )
         };
 
         connector.set_timeout(config.connect_timeout);

src/connect.rs

@@ -63,12 +63,18 @@ impl Connector {
         mut http: HttpConnector,
         proxies: Arc<Vec<Proxy>>,
         local_addr: T,
+        #[cfg(any(target_os = "android", target_os = "fuchsia", target_os = "linux"))]
+        interface: Option<&str>,
         nodelay: bool,
     ) -> Connector
     where
         T: Into<Option<IpAddr>>,
     {
         http.set_local_address(local_addr.into());
+        #[cfg(any(target_os = "android", target_os = "fuchsia", target_os = "linux"))]
+        if let Some(interface) = interface {
+            http.set_interface(interface.to_owned());
+        }
         http.set_nodelay(nodelay);
 
         Connector {