clean up muxresult types

wisp/src/lib.rs

@@ -27,9 +27,9 @@ pub const WISP_VERSION: WispVersion = WispVersion { major: 2, minor: 0 };
 /// The role of the multiplexor.
 #[derive(Debug, PartialEq, Copy, Clone)]
 pub enum Role {
-	/// Client side, can create new channels to proxy.
+	/// Client side, can create new streams.
 	Client,
-	/// Server side, can listen for channels to proxy.
+	/// Server side, can listen for streams created by the client.
 	Server,
 }
 

wisp/src/mux/client.rs

@@ -12,12 +12,12 @@ use futures::channel::oneshot;
 use crate::{
 	extensions::{udp::UdpProtocolExtension, AnyProtocolExtension},
 	inner::{MuxInner, WsEvent},
-	ws::{AppendingWebSocketRead, LockedWebSocketWrite, WebSocketRead, WebSocketWrite, Payload},
+	ws::{AppendingWebSocketRead, LockedWebSocketWrite, Payload, WebSocketRead, WebSocketWrite},
 	CloseReason, MuxProtocolExtensionStream, MuxStream, Packet, PacketType, Role, StreamType,
 	WispError,
 };
 
-use super::{maybe_wisp_v2, send_info_packet, WispV2Extensions};
+use super::{maybe_wisp_v2, send_info_packet, Multiplexor, MuxResult, WispV2Extensions};
 
 /// Client side multiplexor.
 pub struct ClientMux {
@@ -42,7 +42,7 @@ impl ClientMux {
 		mut rx: R,
 		tx: W,
 		wisp_v2: Option<WispV2Extensions>,
-	) -> Result<ClientMuxResult<impl Future<Output = Result<(), WispError>> + Send>, WispError>
+	) -> Result<MuxResult<ClientMux, impl Future<Output = Result<(), WispError>> + Send>, WispError>
 	where
 		R: WebSocketRead + Send,
 		W: WebSocketWrite + Send + 'static,
@@ -78,7 +78,7 @@ impl ClientMux {
 				packet.buffer_remaining,
 			);
 
-			Ok(ClientMuxResult(
+			Ok(MuxResult(
 				Self {
 					actor_tx: mux_result.actor_tx,
 					downgraded,
@@ -174,50 +174,13 @@ impl Drop for ClientMux {
 	}
 }
 
-/// Result of `ClientMux::new`.
+impl Multiplexor for ClientMux {
-pub struct ClientMuxResult<F>(ClientMux, F)
+	fn has_extension(&self, extension_id: u8) -> bool {
-where
+		self.supported_extensions
-	F: Future<Output = Result<(), WispError>> + Send;
+			.iter()
-
+			.any(|x| x.get_id() == extension_id)
-impl<F> ClientMuxResult<F>
-where
-	F: Future<Output = Result<(), WispError>> + Send,
-{
-	/// Require no protocol extensions.
-	pub fn with_no_required_extensions(self) -> (ClientMux, F) {
-		(self.0, self.1)
 	}
-
+	async fn exit(&self, reason: CloseReason) -> Result<(), WispError> {
-	/// Require protocol extensions by their ID.
+		self.close_with_reason(reason).await
-	pub async fn with_required_extensions(
-		self,
-		extensions: &[u8],
-	) -> Result<(ClientMux, F), WispError> {
-		let mut unsupported_extensions = Vec::new();
-		for extension in extensions {
-			if !self
-				.0
-				.supported_extensions
-				.iter()
-				.any(|x| x.get_id() == *extension)
-			{
-				unsupported_extensions.push(*extension);
-			}
-		}
-		if unsupported_extensions.is_empty() {
-			Ok((self.0, self.1))
-		} else {
-			self.0
-				.close_with_reason(CloseReason::ExtensionsIncompatible)
-				.await?;
-			self.1.await?;
-			Err(WispError::ExtensionsNotSupported(unsupported_extensions))
-		}
-	}
-
-	/// Shorthand for `with_required_extensions(&[UdpProtocolExtension::ID])`
-	pub async fn with_udp_extension_required(self) -> Result<(ClientMux, F), WispError> {
-		self.with_required_extensions(&[UdpProtocolExtension::ID])
-			.await
 	}
 }

wisp/src/mux/mod.rs

@@ -2,15 +2,15 @@ mod client;
 mod server;
 use std::{future::Future, pin::Pin, time::Duration};
 
-pub use client::{ClientMux, ClientMuxResult};
+pub use client::ClientMux;
 use futures::{select, FutureExt};
 use futures_timer::Delay;
-pub use server::{ServerMux, ServerMuxResult};
+pub use server::ServerMux;
 
 use crate::{
-	extensions::{AnyProtocolExtension, AnyProtocolExtensionBuilder},
+	extensions::{udp::UdpProtocolExtension, AnyProtocolExtension, AnyProtocolExtensionBuilder},
 	ws::{Frame, LockedWebSocketWrite, WebSocketRead},
-	Packet, PacketType, Role, WispError,
+	CloseReason, Packet, PacketType, Role, WispError,
 };
 
 async fn maybe_wisp_v2<R>(
@@ -67,15 +67,61 @@ async fn send_info_packet(
 		.await
 }
 
+trait Multiplexor {
+	fn has_extension(&self, extension_id: u8) -> bool;
+	async fn exit(&self, reason: CloseReason) -> Result<(), WispError>;
+}
+
+/// Result of creating a multiplexor. Helps require protocol extensions.
+#[allow(private_bounds)]
+pub struct MuxResult<M, F>(M, F)
+where
+	M: Multiplexor,
+	F: Future<Output = Result<(), WispError>> + Send;
+
+#[allow(private_bounds)]
+impl<M, F> MuxResult<M, F>
+where
+	M: Multiplexor,
+	F: Future<Output = Result<(), WispError>> + Send,
+{
+	/// Require no protocol extensions.
+	pub fn with_no_required_extensions(self) -> (M, F) {
+		(self.0, self.1)
+	}
+
+	/// Require protocol extensions by their ID. Will close the multiplexor connection if
+	/// extensions are not supported.
+	pub async fn with_required_extensions(self, extensions: &[u8]) -> Result<(M, F), WispError> {
+		let mut unsupported_extensions = Vec::new();
+		for extension in extensions {
+			if !self.0.has_extension(*extension) {
+				unsupported_extensions.push(*extension);
+			}
+		}
+
+		if unsupported_extensions.is_empty() {
+			Ok((self.0, self.1))
+		} else {
+			self.0.exit(CloseReason::ExtensionsIncompatible).await?;
+			self.1.await?;
+			Err(WispError::ExtensionsNotSupported(unsupported_extensions))
+		}
+	}
+
+	/// Shorthand for `with_required_extensions(&[UdpProtocolExtension::ID])`
+	pub async fn with_udp_extension_required(self) -> Result<(M, F), WispError> {
+		self.with_required_extensions(&[UdpProtocolExtension::ID])
+			.await
+	}
+}
+
+type WispV2ClosureResult = Pin<Box<dyn Future<Output = Result<(), WispError>> + Sync + Send>>;
+type WispV2ClosureBuilders<'a> = &'a mut [AnyProtocolExtensionBuilder];
 /// Wisp V2 handshake and protocol extension settings wrapper struct.
 pub struct WispV2Extensions {
 	builders: Vec<AnyProtocolExtensionBuilder>,
-	closure: Box<
+	closure: Box<dyn Fn(WispV2ClosureBuilders) -> WispV2ClosureResult + Send>,
-		dyn Fn(
-				&mut [AnyProtocolExtensionBuilder],
-			) -> Pin<Box<dyn Future<Output = Result<(), WispError>> + Sync + Send>>
-			+ Send,
-	>,
 }
 
 impl WispV2Extensions {
@@ -90,11 +136,7 @@ impl WispV2Extensions {
 	/// Create a Wisp V2 settings struct with some middleware.
 	pub fn new_with_middleware<C>(builders: Vec<AnyProtocolExtensionBuilder>, closure: C) -> Self
 	where
-		C: Fn(
+		C: Fn(WispV2ClosureBuilders) -> WispV2ClosureResult + Send + 'static,
-				&mut [AnyProtocolExtensionBuilder],
-			) -> Pin<Box<dyn Future<Output = Result<(), WispError>> + Sync + Send>>
-			+ Send
-			+ 'static,
 	{
 		Self {
 			builders,

wisp/src/mux/server.rs

@@ -11,13 +11,13 @@ use flume as mpsc;
 use futures::channel::oneshot;
 
 use crate::{
-	extensions::{udp::UdpProtocolExtension, AnyProtocolExtension},
+	extensions::AnyProtocolExtension,
 	inner::{MuxInner, WsEvent},
 	ws::{AppendingWebSocketRead, LockedWebSocketWrite, Payload, WebSocketRead, WebSocketWrite},
 	CloseReason, ConnectPacket, MuxProtocolExtensionStream, MuxStream, Packet, Role, WispError,
 };
 
-use super::{maybe_wisp_v2, send_info_packet, WispV2Extensions};
+use super::{maybe_wisp_v2, send_info_packet, Multiplexor, MuxResult, WispV2Extensions};
 
 /// Server-side multiplexor.
 pub struct ServerMux {
@@ -44,7 +44,7 @@ impl ServerMux {
 		tx: W,
 		buffer_size: u32,
 		wisp_v2: Option<WispV2Extensions>,
-	) -> Result<ServerMuxResult<impl Future<Output = Result<(), WispError>> + Send>, WispError>
+	) -> Result<MuxResult<ServerMux, impl Future<Output = Result<(), WispError>> + Send>, WispError>
 	where
 		R: WebSocketRead + Send,
 		W: WebSocketWrite + Send + 'static,
@@ -74,7 +74,7 @@ impl ServerMux {
 				buffer_size,
 			);
 
-			Ok(ServerMuxResult(
+			Ok(MuxResult(
 				Self {
 					muxstream_recv,
 					actor_tx: mux_result.actor_tx,
@@ -175,51 +175,13 @@ impl Drop for ServerMux {
 	}
 }
 
-/// Result of `ServerMux::new`.
+impl Multiplexor for ServerMux {
-pub struct ServerMuxResult<F>(ServerMux, F)
+	fn has_extension(&self, extension_id: u8) -> bool {
-where
+		self.supported_extensions
-	F: Future<Output = Result<(), WispError>> + Send;
+			.iter()
-
+			.any(|x| x.get_id() == extension_id)
-impl<F> ServerMuxResult<F>
-where
-	F: Future<Output = Result<(), WispError>> + Send,
-{
-	/// Require no protocol extensions.
-	pub fn with_no_required_extensions(self) -> (ServerMux, F) {
-		(self.0, self.1)
 	}
-
+	async fn exit(&self, reason: CloseReason) -> Result<(), WispError> {
-	/// Require protocol extensions by their ID. Will close the multiplexor connection if
+		self.close_with_reason(reason).await
-	/// extensions are not supported.
-	pub async fn with_required_extensions(
-		self,
-		extensions: &[u8],
-	) -> Result<(ServerMux, F), WispError> {
-		let mut unsupported_extensions = Vec::new();
-		for extension in extensions {
-			if !self
-				.0
-				.supported_extensions
-				.iter()
-				.any(|x| x.get_id() == *extension)
-			{
-				unsupported_extensions.push(*extension);
-			}
-		}
-		if unsupported_extensions.is_empty() {
-			Ok((self.0, self.1))
-		} else {
-			self.0
-				.close_with_reason(CloseReason::ExtensionsIncompatible)
-				.await?;
-			self.1.await?;
-			Err(WispError::ExtensionsNotSupported(unsupported_extensions))
-		}
-	}
-
-	/// Shorthand for `with_required_extensions(&[UdpProtocolExtension::ID])`
-	pub async fn with_udp_extension_required(self) -> Result<(ServerMux, F), WispError> {
-		self.with_required_extensions(&[UdpProtocolExtension::ID])
-			.await
 	}
 }