From 4e4d741075e336c500dbe199159b4171291cdd81 Mon Sep 17 00:00:00 2001
From: wwqgtxx <wwqgtxx@gmail.com>
Date: Mon, 16 Jan 2023 12:11:34 +0800
Subject: [PATCH] chore: code cleanup

---
 adapter/outbound/base.go     | 3 ---
 common/net/bufconn.go        | 3 ---
 common/net/sing.go           | 2 --
 transport/vless/conn.go      | 3 ---
 transport/vmess/websocket.go | 4 ----
 5 files changed, 15 deletions(-)

diff --git a/adapter/outbound/base.go b/adapter/outbound/base.go
index e0efe5958d..dc339969e9 100644
--- a/adapter/outbound/base.go
+++ b/adapter/outbound/base.go
@@ -188,9 +188,6 @@ func (c *conn) AppendToChains(a C.ProxyAdapter) {
 }
 
 func (c *conn) Upstream() any {
-	if wrapper, ok := c.ExtendedConn.(*N.ExtendedConnWrapper); ok {
-		return wrapper.Conn
-	}
 	return c.ExtendedConn
 }
 
diff --git a/common/net/bufconn.go b/common/net/bufconn.go
index b3e3d1f355..9f1dda2b21 100644
--- a/common/net/bufconn.go
+++ b/common/net/bufconn.go
@@ -56,8 +56,5 @@ func (c *BufferedConn) ReadBuffer(buffer *buf.Buffer) (err error) {
 }
 
 func (c *BufferedConn) Upstream() any {
-	if wrapper, ok := c.ExtendedConn.(*ExtendedConnWrapper); ok {
-		return wrapper.Conn
-	}
 	return c.ExtendedConn
 }
diff --git a/common/net/sing.go b/common/net/sing.go
index 37ba3f0c1d..342f2e9581 100644
--- a/common/net/sing.go
+++ b/common/net/sing.go
@@ -8,8 +8,6 @@ import (
 	"github.com/sagernet/sing/common/network"
 )
 
-type ExtendedConnWrapper = bufio.ExtendedConnWrapper
-
 var NewExtendedConn = bufio.NewExtendedConn
 var NewExtendedWriter = bufio.NewExtendedWriter
 var NewExtendedReader = bufio.NewExtendedReader
diff --git a/transport/vless/conn.go b/transport/vless/conn.go
index d57f3ae1f5..75eef495d5 100644
--- a/transport/vless/conn.go
+++ b/transport/vless/conn.go
@@ -123,9 +123,6 @@ func (vc *Conn) recvResponse() error {
 }
 
 func (vc *Conn) Upstream() any {
-	if wrapper, ok := vc.ExtendedConn.(*N.ExtendedConnWrapper); ok {
-		return wrapper.Conn
-	}
 	return vc.ExtendedConn
 }
 
diff --git a/transport/vmess/websocket.go b/transport/vmess/websocket.go
index 90cd7772f4..b38c0006f5 100644
--- a/transport/vmess/websocket.go
+++ b/transport/vmess/websocket.go
@@ -17,7 +17,6 @@ import (
 	"strings"
 	"sync"
 	"time"
-	_ "unsafe"
 
 	"github.com/Dreamacro/clash/common/buf"
 	N "github.com/Dreamacro/clash/common/net"
@@ -25,9 +24,6 @@ import (
 	"github.com/gorilla/websocket"
 )
 
-//go:linkname maskBytes github.com/gorilla/websocket.maskBytes
-func maskBytes(key [4]byte, pos int, b []byte) int
-
 type websocketConn struct {
 	conn       *websocket.Conn
 	reader     io.Reader