cleanup internet connection

transport/internet/internal/connection.go

@@ -1,4 +1,4 @@
-package tcp
+package internal
 
 import (
 	"io"
@@ -6,25 +6,52 @@ import (
 	"sync"
 	"time"
 
-	"v2ray.com/core/transport/internet/internal"
+	v2net "v2ray.com/core/common/net"
 )
 
-type Connection struct {
-	sync.RWMutex
-	id       internal.ConnectionID
-	reusable bool
-	conn     net.Conn
-	listener internal.ConnectionRecyler
-	config   *Config
+// ConnectionID is the ID of a connection.
+type ConnectionID struct {
+	Local      v2net.Address
+	Remote     v2net.Address
+	RemotePort v2net.Port
 }
 
-func NewConnection(id internal.ConnectionID, conn net.Conn, manager internal.ConnectionRecyler, config *Config) *Connection {
+// NewConnectionID creates a new ConnectionId.
+func NewConnectionID(source v2net.Address, dest v2net.Destination) ConnectionID {
+	return ConnectionID{
+		Local:      source,
+		Remote:     dest.Address,
+		RemotePort: dest.Port,
+	}
+}
+
+type Reuser struct {
+	userEnabled bool
+	appEnable   bool
+}
+
+func ReuseConnection(reuse bool) *Reuser {
+	return &Reuser{
+		userEnabled: reuse,
+		appEnable:   reuse,
+	}
+}
+
+// Connection is an implementation of net.Conn with re-usability.
+type Connection struct {
+	sync.RWMutex
+	id       ConnectionID
+	conn     net.Conn
+	listener ConnectionRecyler
+	reuser   *Reuser
+}
+
+func NewConnection(id ConnectionID, conn net.Conn, manager ConnectionRecyler, reuser *Reuser) *Connection {
 	return &Connection{
 		id:       id,
 		conn:     conn,
 		listener: manager,
-		reusable: config.IsConnectionReuse(),
-		config:   config,
+		reuser:   reuser,
 	}
 }
 
@@ -45,6 +72,7 @@ func (v *Connection) Write(b []byte) (int, error) {
 	return conn.Write(b)
 }
 
+// Close implements net.Conn.Close(). If the connection is reusable, the underlying connection will be recycled.
 func (v *Connection) Close() error {
 	if v == nil {
 		return io.ErrClosedPipe
@@ -108,14 +136,14 @@ func (v *Connection) SetReusable(reusable bool) {
 	if v == nil {
 		return
 	}
-	v.reusable = reusable
+	v.reuser.appEnable = reusable
 }
 
 func (v *Connection) Reusable() bool {
 	if v == nil {
 		return false
 	}
-	return v.config.IsConnectionReuse() && v.reusable
+	return v.reuser.userEnabled && v.reuser.appEnable
 }
 
 func (v *Connection) SysFd() (int, error) {
@@ -123,7 +151,7 @@ func (v *Connection) SysFd() (int, error) {
 	if conn == nil {
 		return 0, io.ErrClosedPipe
 	}
-	return internal.GetSysFd(conn)
+	return GetSysFd(conn)
 }
 
 func (v *Connection) underlyingConn() net.Conn {

transport/internet/internal/pool.go

@@ -5,7 +5,6 @@ import (
 	"sync"
 	"time"
 
-	v2net "v2ray.com/core/common/net"
 	"v2ray.com/core/common/signal"
 )
 
@@ -15,22 +14,6 @@ type ConnectionRecyler interface {
 	Put(ConnectionID, net.Conn)
 }
 
-// ConnectionID is the ID of a connection.
-type ConnectionID struct {
-	Local      v2net.Address
-	Remote     v2net.Address
-	RemotePort v2net.Port
-}
-
-// NewConnectionID creates a new ConnectionId.
-func NewConnectionID(source v2net.Address, dest v2net.Destination) ConnectionID {
-	return ConnectionID{
-		Local:      source,
-		Remote:     dest.Address,
-		RemotePort: dest.Port,
-	}
-}
-
 // ExpiringConnection is a connection that will expire in certain time.
 type ExpiringConnection struct {
 	conn   net.Conn

transport/internet/kcp/dialer.go

@@ -165,7 +165,7 @@ func DialKCP(src v2net.Address, dest v2net.Destination, options internet.DialerO
 				config.ServerName = dest.Address.Domain()
 			}
 			tlsConn := tls.Client(iConn, config)
-			iConn = v2tls.NewConnection(tlsConn)
+			iConn = UnreusableConnection{Conn: tlsConn}
 		}
 	}
 

transport/internet/kcp/listener.go

@@ -236,7 +236,7 @@ func (v *Listener) Accept() (internet.Connection, error) {
 			}
 			if v.tlsConfig != nil {
 				tlsConn := tls.Server(conn, v.tlsConfig)
-				return v2tls.NewConnection(tlsConn), nil
+				return UnreusableConnection{Conn: tlsConn}, nil
 			}
 			return conn, nil
 		case <-time.After(time.Second):

transport/internet/kcp/tls.go

@@ -0,0 +1,13 @@
+package kcp
+
+import "net"
+
+type UnreusableConnection struct {
+	net.Conn
+}
+
+func (c UnreusableConnection) Reusable() bool {
+	return false
+}
+
+func (c UnreusableConnection) SetReusable(bool) {}

transport/internet/tcp/dialer.go

@@ -66,7 +66,7 @@ func Dial(src v2net.Address, dest v2net.Destination, options internet.DialerOpti
 			conn = auth.Client(conn)
 		}
 	}
-	return NewConnection(id, conn, globalCache, tcpSettings), nil
+	return internal.NewConnection(id, conn, globalCache, internal.ReuseConnection(tcpSettings.IsConnectionReuse())), nil
 }
 
 func init() {

transport/internet/tcp/hub.go

@@ -91,7 +91,7 @@ func (v *TCPListener) Accept() (internet.Connection, error) {
 				return nil, connErr.err
 			}
 			conn := connErr.conn
-			return NewConnection(internal.ConnectionID{}, conn, v, v.config), nil
+			return internal.NewConnection(internal.ConnectionID{}, conn, v, internal.ReuseConnection(v.config.IsConnectionReuse())), nil
 		case <-time.After(time.Second * 2):
 		}
 	}

transport/internet/tls/connection.go

@@ -1,21 +0,0 @@
-package tls
-
-import (
-	"crypto/tls"
-)
-
-type Connection struct {
-	*tls.Conn
-}
-
-func (v *Connection) Reusable() bool {
-	return false
-}
-
-func (v *Connection) SetReusable(bool) {}
-
-func NewConnection(conn *tls.Conn) *Connection {
-	return &Connection{
-		Conn: conn,
-	}
-}

transport/internet/websocket/wsconn.go

@@ -121,18 +121,10 @@ func (ws *wsconn) RemoteAddr() net.Addr {
 	return ws.wsc.RemoteAddr()
 }
 func (ws *wsconn) SetDeadline(t time.Time) error {
-	return func() error {
-		errr := ws.SetReadDeadline(t)
-		errw := ws.SetWriteDeadline(t)
-		if errr == nil || errw == nil {
-			return nil
+	if err := ws.SetReadDeadline(t); err != nil {
+		return err
 	}
-		if errr != nil {
-			return errr
-		}
-
-		return errw
-	}()
+	return ws.SetWriteDeadline(t)
 }
 func (ws *wsconn) SetReadDeadline(t time.Time) error {
 	return ws.wsc.SetReadDeadline(t)