diff --git a/src/main.rs b/src/main.rs
index 05ca9ef..fb62e7e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -39,6 +39,7 @@ pub mod wizard;
 #[cfg(feature = "websocket")]
 pub mod wsproxy;
 
+use net::SocketBuilder;
 use structopt::StructOpt;
 use tokio::runtime::Runtime;
 
@@ -176,7 +177,7 @@ fn setup_device(config: &Config) -> TunTapDevice {
 }
 
 #[allow(clippy::cognitive_complexity)]
-fn run<P: Protocol>(config: Config, socket: NetSocket) {
+fn run<P: Protocol, S: SocketBuilder>(config: Config, socket: S) {
     let device = setup_device(&config);
     let port_forwarding = if config.port_forwarding { socket.create_port_forwarding() } else { None };
     let stats_file = match config.stats_file {
@@ -226,9 +227,9 @@ fn run<P: Protocol>(config: Config, socket: NetSocket) {
     rt.block_on(async move {
         // Warning: no async code outside this block, or it will break on daemonize
         let device = AsyncTunTapDevice::from_sync(device);
-        let socket = try_fail!(AsyncNetSocket::from_sync(socket), "Failed to create async socket: {}");
+        let socket = try_fail!(socket.build(), "Failed to create async socket: {}");
         let mut cloud = try_fail!(
-            GenericCloud::<AsyncTunTapDevice, P, AsyncNetSocket, SystemTimeSource>::new(
+            GenericCloud::<AsyncTunTapDevice, P, S::SocketType, SystemTimeSource>::new(
                 &config,
                 socket,
                 device,
@@ -345,27 +346,18 @@ fn main() {
         error!("Either password or private key must be set in config or given as parameter");
         return;
     }
-    /*
     #[cfg(feature = "websocket")]
     if config.listen.starts_with("ws://") {
-        let socket = {
-            let rt = Runtime::new().unwrap();
-            try_fail!(
-                rt.block_on(ProxyConnection::listen(&config.listen)),
-                "Failed to open socket {}: {}",
-                config.listen
-            )
-        };
+        let socket = try_fail!(ProxyConnection::listen(&config.listen), "Failed to open socket {}: {}", config.listen);
         match config.device_type {
             Type::Tap => run::<payload::Frame, _>(config, socket),
             Type::Tun => run::<payload::Packet, _>(config, socket),
         }
         return;
     }
-    */
     let socket = try_fail!(NetSocket::listen(&config.listen), "Failed to open socket {}: {}", config.listen);
     match config.device_type {
-        Type::Tap => run::<payload::Frame>(config, socket),
-        Type::Tun => run::<payload::Packet>(config, socket),
+        Type::Tap => run::<payload::Frame, _>(config, socket),
+        Type::Tun => run::<payload::Packet, _>(config, socket),
     }
 }
diff --git a/src/net.rs b/src/net.rs
index 313570d..14aa3b4 100644
--- a/src/net.rs
+++ b/src/net.rs
@@ -32,6 +32,12 @@ pub fn get_ip() -> IpAddr {
     s.local_addr().unwrap().ip()
 }
 
+pub trait SocketBuilder {
+    type SocketType: Socket;
+    fn build(self) -> Result<Self::SocketType, io::Error>;
+    fn create_port_forwarding(&self) -> Option<PortForwarding>;
+}
+
 #[async_trait]
 pub trait Socket: Sized + Clone + Send + Sync + 'static {
     async fn receive(&mut self, buffer: &mut MsgBuffer) -> Result<SocketAddr, io::Error>;
@@ -60,11 +66,18 @@ impl NetSocket {
         let addr = parse_listen(addr, DEFAULT_PORT);
         Ok(Self(UdpSocket::bind(addr)?))
     }
+}
 
-    pub fn create_port_forwarding(&self) -> Option<PortForwarding> {
+impl SocketBuilder for NetSocket {
+    type SocketType = AsyncNetSocket;
+
+    fn create_port_forwarding(&self) -> Option<PortForwarding> {
         PortForwarding::new(self.0.local_addr().unwrap().port())
     }
 
+    fn build(self) -> Result<Self::SocketType, io::Error> {
+        Ok(AsyncNetSocket(Arc::new(AsyncUdpSocket::from_std(self.0)?)))
+    }
 }
 
 pub struct AsyncNetSocket(Arc<AsyncUdpSocket>);
@@ -75,13 +88,6 @@ impl Clone for AsyncNetSocket {
     }
 }
 
-impl AsyncNetSocket {
-    pub fn from_sync(sock: NetSocket) -> Result<Self, io::Error> {
-        Ok(Self(Arc::new(AsyncUdpSocket::from_std(sock.0)?)))
-    }
-}
-
-
 #[async_trait]
 impl Socket for AsyncNetSocket {
     async fn receive(&mut self, buffer: &mut MsgBuffer) -> Result<SocketAddr, io::Error> {
diff --git a/src/wsproxy.rs b/src/wsproxy.rs
index f31df64..26c43fb 100644
--- a/src/wsproxy.rs
+++ b/src/wsproxy.rs
@@ -3,7 +3,7 @@
 // This software is licensed under GPL-3 or newer (see LICENSE.md)
 
 use super::{
-    net::{get_ip, mapped_addr, parse_listen, Socket},
+    net::{get_ip, mapped_addr, parse_listen, Socket, SocketBuilder},
     poll::{WaitImpl, WaitResult},
     port_forwarding::PortForwarding,
     util::MsgBuffer,
@@ -115,6 +115,17 @@ pub struct ProxyConnection {
 }
 
 impl ProxyConnection {
+    pub fn listen(url: &str) -> Result<Self, io::Error> {
+        let parsed_url = io_error!(Url::parse(url), "Invalid URL {}: {}", url)?;
+        let (mut socket, _) = io_error!(connect(parsed_url), "Failed to connect to URL {}: {}", url)?;
+        socket.get_mut().set_nodelay(true)?;
+        let addr = "0.0.0.0:0".parse::<SocketAddr>().unwrap();
+        let mut con = ProxyConnection { addr, socket: Arc::new(socket) };
+        let addr_data = con.read_message()?;
+        con.addr = read_addr(Cursor::new(&addr_data))?;
+        Ok(con)
+    }
+
     fn read_message(&mut self) -> Result<Vec<u8>, io::Error> {
         loop {
             unimplemented!();
@@ -127,21 +138,20 @@ impl ProxyConnection {
     }
 }
 
+impl SocketBuilder for ProxyConnection {
+    type SocketType = ProxyConnection;
+
+    fn build(self) -> Result<Self::SocketType, io::Error> {
+        Ok(self)
+    }
+
+    fn create_port_forwarding(&self) -> Option<PortForwarding> {
+        None
+    }
+}
+
 #[async_trait]
 impl Socket for ProxyConnection {
-    /*
-    async fn listen(url: &str) -> Result<Self, io::Error> {
-        let parsed_url = io_error!(Url::parse(url), "Invalid URL {}: {}", url)?;
-        let (mut socket, _) = io_error!(connect(parsed_url), "Failed to connect to URL {}: {}", url)?;
-        socket.get_mut().set_nodelay(true)?;
-        let addr = "0.0.0.0:0".parse::<SocketAddr>().unwrap();
-        let mut con = ProxyConnection { addr, socket: Arc::new(socket) };
-        let addr_data = con.read_message()?;
-        con.addr = read_addr(Cursor::new(&addr_data))?;
-        Ok(con)
-    }
-    */
-
     async fn receive(&mut self, buffer: &mut MsgBuffer) -> Result<SocketAddr, io::Error> {
         buffer.clear();
         let data = self.read_message()?;