remove unused

app/dns/nameserver_udp.go

@@ -90,9 +90,7 @@ func (s *ClassicNameServer) RequestsCleanup() error {
 
 // HandleResponse handles udp response packet from remote DNS server.
 func (s *ClassicNameServer) HandleResponse(ctx context.Context, packet *udp_proto.Packet) {
-	payload := packet.Payload
-	ipRec, err := parseResponse(payload.Bytes())
-	payload.Release()
+	ipRec, err := parseResponse(packet.Payload.Bytes())
 	if err != nil {
 		errors.LogError(ctx, s.Name(), " fail to parse responded DNS udp")
 		return

app/proxyman/inbound/worker.go

@@ -382,7 +382,7 @@ func (w *udpWorker) clean() error {
 	}
 
 	for addr, conn := range w.activeConn {
-		if nowSec-atomic.LoadInt64(&conn.lastActivityTime) > 60 {
+		if nowSec-atomic.LoadInt64(&conn.lastActivityTime) > 2*60 {
 			if !conn.inactive {
 				conn.setInactive()
 				delete(w.activeConn, addr)
@@ -409,7 +409,7 @@ func (w *udpWorker) Start() error {
 	w.cone = w.ctx.Value("cone").(bool)
 
 	w.checker = &task.Periodic{
-		Interval: 30 * time.Second,
+		Interval: time.Minute,
 		Execute:  w.clean,
 	}
 

go.mod

@@ -27,7 +27,7 @@ require (
 	golang.org/x/sys v0.35.0
 	golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173
 	google.golang.org/grpc v1.75.0
-	google.golang.org/protobuf v1.36.8
+	google.golang.org/protobuf v1.36.7
 	gvisor.dev/gvisor v0.0.0-20250428193742-2d800c3129d5
 	h12.io/socks v1.0.3
 	lukechampine.com/blake3 v1.4.1

go.sum

@@ -145,8 +145,8 @@ google.golang.org/genproto/googleapis/rpc v0.0.0-20250707201910-8d1bb00bc6a7 h1:
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250707201910-8d1bb00bc6a7/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A=
 google.golang.org/grpc v1.75.0 h1:+TW+dqTd2Biwe6KKfhE5JpiYIBWq865PhKGSXiivqt4=
 google.golang.org/grpc v1.75.0/go.mod h1:JtPAzKiq4v1xcAB2hydNlWI2RnF85XXcV0mhKXr2ecQ=
-google.golang.org/protobuf v1.36.8 h1:xHScyCOEuuwZEc6UtSOvPbAT4zRh0xcNRYekJwfqyMc=
-google.golang.org/protobuf v1.36.8/go.mod h1:fuxRtAxBytpl4zzqUh6/eyUujkJdNiuEkXntxiD/uRU=
+google.golang.org/protobuf v1.36.7 h1:IgrO7UwFQGJdRNXH/sQux4R1Dj1WAKcLElzeeRaXV2A=
+google.golang.org/protobuf v1.36.7/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

proxy/freedom/freedom.go

@@ -18,7 +18,6 @@ import (
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/common/signal"
 	"github.com/xtls/xray-core/common/task"
-	"github.com/xtls/xray-core/common/utils"
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/stats"
@@ -190,7 +189,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 				writer = buf.NewWriter(conn)
 			}
 		} else {
-			writer = NewPacketWriter(conn, h, UDPOverride, destination)
+			writer = NewPacketWriter(conn, UDPOverride, destination)
 			if h.config.Noises != nil {
 				errors.LogDebug(ctx, "NOISE", h.config.Noises)
 				writer = &NoisePacketWriter{
@@ -262,7 +261,7 @@ func isTLSConn(conn stat.Connection) bool {
 	return false
 }
 
-func NewPacketReader(conn net.Conn, UDPOverride net.Destination, DialDest net.Destination) buf.Reader {
+func NewPacketReader(conn net.Conn, UDPOverride net.Destination, destination net.Destination) buf.Reader {
 	iConn := conn
 	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
@@ -282,7 +281,7 @@ func NewPacketReader(conn net.Conn, UDPOverride net.Destination, DialDest net.De
 			PacketConnWrapper: c,
 			Counter:           counter,
 			IsOverridden:      isOverridden,
-			InitUnchangedAddr: DialDest.Address,
+			InitUnchangedAddr: destination.Address,
 			InitChangedAddr:   net.DestinationFromAddr(conn.RemoteAddr()).Address,
 		}
 	}
@@ -326,7 +325,7 @@ func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
 }
 
 // DialDest means the dial target used in the dialer when creating conn
-func NewPacketWriter(conn net.Conn, h *Handler, UDPOverride net.Destination, DialDest net.Destination) buf.Writer {
+func NewPacketWriter(conn net.Conn, UDPOverride net.Destination, destination net.Destination) buf.Writer {
 	iConn := conn
 	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
@@ -337,19 +336,12 @@ func NewPacketWriter(conn net.Conn, h *Handler, UDPOverride net.Destination, Dia
 		counter = statConn.WriteCounter
 	}
 	if c, ok := iConn.(*internet.PacketConnWrapper); ok {
-		// If DialDest is a domain, it will be resolved in dialer
-		// check this behavior and add it to map
-		resolvedUDPAddr := utils.NewTypedSyncMap[string, net.Address]()
-		if DialDest.Address.Family().IsDomain() {
-			resolvedUDPAddr.Store(DialDest.Address.Domain(), net.DestinationFromAddr(conn.RemoteAddr()).Address)
-		}
 		return &PacketWriter{
 			PacketConnWrapper: c,
 			Counter:           counter,
-			Handler:           h,
 			UDPOverride:       UDPOverride,
-			ResolvedUDPAddr:   resolvedUDPAddr,
-			LocalAddr:         net.DestinationFromAddr(conn.LocalAddr()).Address,
+			InitUnchangedAddr: destination.Address,
+			InitChangedAddr:   net.DestinationFromAddr(conn.RemoteAddr()).Address,
 		}
 
 	}
@@ -359,15 +351,10 @@ func NewPacketWriter(conn net.Conn, h *Handler, UDPOverride net.Destination, Dia
 type PacketWriter struct {
 	*internet.PacketConnWrapper
 	stats.Counter
-	*Handler
 	UDPOverride net.Destination
 
-	// Dest of udp packets might be a domain, we will resolve them to IP
-	// But resolver will return a random one if the domain has many IPs
-	// Resulting in these packets being sent to many different IPs randomly
-	// So, cache and keep the resolve result
-	ResolvedUDPAddr *utils.TypedSyncMap[string, net.Address]
-	LocalAddr       net.Address
+	InitUnchangedAddr net.Address
+	InitChangedAddr   net.Address
 }
 
 func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
@@ -386,44 +373,15 @@ func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 			if w.UDPOverride.Port != 0 {
 				b.UDP.Port = w.UDPOverride.Port
 			}
+			if b.UDP.Address == w.InitUnchangedAddr {
+				b.UDP.Address = w.InitChangedAddr
+			}
 			if b.UDP.Address.Family().IsDomain() {
-				if ip, ok := w.ResolvedUDPAddr.Load(b.UDP.Address.Domain()); ok {
-					b.UDP.Address = ip
-				} else {
-					ShouldUseSystemResolver := true
-					if w.Handler.config.DomainStrategy.HasStrategy() {
-						ips, err := internet.LookupForIP(b.UDP.Address.Domain(), w.Handler.config.DomainStrategy, w.LocalAddr)
-						if err != nil {
-							// drop packet if resolve failed when forceIP
-							if w.Handler.config.DomainStrategy.ForceIP() {
-								b.Release()
-								continue
-							}
-						} else {
-							ip = net.IPAddress(ips[dice.Roll(len(ips))])
-							ShouldUseSystemResolver = false
-						}
-					}
-					if ShouldUseSystemResolver {
-						udpAddr, err := net.ResolveUDPAddr("udp", b.UDP.NetAddr())
-						if err != nil {
-							b.Release()
-							continue
-						} else {
-							ip = net.IPAddress(udpAddr.IP)
-						}
-					}
-					if ip != nil {
-						b.UDP.Address, _ = w.ResolvedUDPAddr.LoadOrStore(b.UDP.Address.Domain(), ip)
-					}
-				}
-			}
-			destAddr := b.UDP.RawNetAddr()
-			if destAddr == nil {
 				b.Release()
-				continue
+				buf.ReleaseMulti(mb)
+				return errors.New("multiple domains cone is not supported")
 			}
-			n, err = w.PacketConnWrapper.WriteTo(b.Bytes(), destAddr)
+			n, err = w.PacketConnWrapper.WriteTo(b.Bytes(), b.UDP.RawNetAddr())
 		} else {
 			n, err = w.PacketConnWrapper.Write(b.Bytes())
 		}

proxy/shadowsocks/server.go

@@ -104,12 +104,12 @@ func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Con
 func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	udpServer := udp.NewDispatcher(dispatcher, func(ctx context.Context, packet *udp_proto.Packet) {
 		request := protocol.RequestHeaderFromContext(ctx)
-		payload := packet.Payload
 		if request == nil {
-			payload.Release()
 			return
 		}
 
+		payload := packet.Payload
+
 		if payload.UDP != nil {
 			request = &protocol.RequestHeader{
 				User:    request.User,
@@ -124,9 +124,9 @@ func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dis
 			errors.LogWarningInner(ctx, err, "failed to encode UDP packet")
 			return
 		}
+		defer data.Release()
 
 		conn.Write(data.Bytes())
-		data.Release()
 	})
 	defer udpServer.RemoveRay()
 

proxy/socks/server.go

@@ -231,7 +231,6 @@ func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dis
 
 		request := protocol.RequestHeaderFromContext(ctx)
 		if request == nil {
-			payload.Release()
 			return
 		}
 
@@ -250,9 +249,9 @@ func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dis
 			errors.LogWarningInner(ctx, err, "failed to write UDP response")
 			return
 		}
+		defer udpMessage.Release()
 
 		conn.Write(udpMessage.Bytes())
-		udpMessage.Release()
 	})
 	defer udpServer.RemoveRay()
 

proxy/trojan/protocol.go

@@ -113,11 +113,9 @@ func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 			target = b.UDP
 		}
 		if _, err := w.writePacket(b.Bytes(), *target); err != nil {
-			b.Release()
 			buf.ReleaseMulti(mb)
 			return err
 		}
-		b.Release()
 	}
 	return nil
 }

transport/internet/udp/dispatcher.go

@@ -22,24 +22,8 @@ type ResponseCallback func(ctx context.Context, packet *udp.Packet)
 
 type connEntry struct {
 	link   *transport.Link
-	timer  *signal.ActivityTimer
+	timer  signal.ActivityUpdater
 	cancel context.CancelFunc
-	closed bool
-}
-
-func (c *connEntry) Close() error {
-	c.timer.SetTimeout(0)
-	return nil
-}
-
-func (c *connEntry) terminate() {
-	if c.closed {
-		panic("terminate called more than once")
-	}
-	c.closed = true
-	c.cancel()
-	common.Interrupt(c.link.Reader)
-	common.Interrupt(c.link.Writer)
 }
 
 type Dispatcher struct {
@@ -48,7 +32,6 @@ type Dispatcher struct {
 	dispatcher routing.Dispatcher
 	callback   ResponseCallback
 	callClose  func() error
-	closed     bool
 }
 
 func NewDispatcher(dispatcher routing.Dispatcher, callback ResponseCallback) *Dispatcher {
@@ -61,9 +44,13 @@ func NewDispatcher(dispatcher routing.Dispatcher, callback ResponseCallback) *Di
 func (v *Dispatcher) RemoveRay() {
 	v.Lock()
 	defer v.Unlock()
-	v.closed = true
+	v.removeRay()
+}
+
+func (v *Dispatcher) removeRay() {
 	if v.conn != nil {
-		v.conn.Close()
+		common.Interrupt(v.conn.link.Reader)
+		common.Close(v.conn.link.Writer)
 		v.conn = nil
 	}
 }
@@ -72,34 +59,35 @@ func (v *Dispatcher) getInboundRay(ctx context.Context, dest net.Destination) (*
 	v.Lock()
 	defer v.Unlock()
 
-	if v.closed {
-		return nil, errors.New("dispatcher is closed")
-	}
-
 	if v.conn != nil {
-		if v.conn.closed {
-			v.conn = nil
-		} else {
-			return v.conn, nil
-		}
+		return v.conn, nil
 	}
 
 	errors.LogInfo(ctx, "establishing new connection for ", dest)
 
 	ctx, cancel := context.WithCancel(ctx)
+	entry := &connEntry{}
+	removeRay := func() {
+		v.Lock()
+		defer v.Unlock()
+		// sometimes the entry is already removed by others, don't close again
+		if entry == v.conn {
+			cancel()
+			v.removeRay()
+		}
+	}
+	timer := signal.CancelAfterInactivity(ctx, removeRay, time.Minute)
 
 	link, err := v.dispatcher.Dispatch(ctx, dest)
 	if err != nil {
-		cancel()
 		return nil, errors.New("failed to dispatch request to ", dest).Base(err)
 	}
 
-	entry := &connEntry{
+	*entry = connEntry{
 		link:   link,
-		cancel: cancel,
+		timer:  timer,
+		cancel: removeRay,
 	}
-
-	entry.timer = signal.CancelAfterInactivity(ctx, entry.terminate, 30*time.Second) // The UDP timeout is set to 30 seconds in most NAT configurations
 	v.conn = entry
 	go handleInput(ctx, entry, dest, v.callback, v.callClose)
 	return entry, nil
@@ -118,7 +106,7 @@ func (v *Dispatcher) Dispatch(ctx context.Context, destination net.Destination,
 	if outputStream != nil {
 		if err := outputStream.WriteMultiBuffer(buf.MultiBuffer{payload}); err != nil {
 			errors.LogInfoInner(ctx, err, "failed to write first UDP payload")
-			conn.Close()
+			conn.cancel()
 			return
 		}
 	}
@@ -126,7 +114,7 @@ func (v *Dispatcher) Dispatch(ctx context.Context, destination net.Destination,
 
 func handleInput(ctx context.Context, conn *connEntry, dest net.Destination, callback ResponseCallback, callClose func() error) {
 	defer func() {
-		conn.Close()
+		conn.cancel()
 		if callClose != nil {
 			callClose()
 		}