Add NewClient()

Fixes https://github.com/XTLS/Xray-core/issues/5088

README.md

@@ -11,8 +11,10 @@
 [<img alt="Project X NFT" width="150px" src="https://raw2.seadn.io/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/7fa9ce900fb39b44226348db330e32/8b7fa9ce900fb39b44226348db330e32.svg" />](https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/1)
 
 - **ETH/USDT/USDC: `0xDc3Fe44F0f25D13CACb1C4896CD0D321df3146Ee`**
+- **Project X NFT: https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/1**
+- **VLESS NFT: https://opensea.io/collection/vless**
 - **REALITY NFT: https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/2**
-- **Related links: https://opensea.io/collection/xtls, [Announcement of NFTs by Project X](https://github.com/XTLS/Xray-core/discussions/3633), [XHTTP: Beyond REALITY](https://github.com/XTLS/Xray-core/discussions/4113)**
+- **Related links: [VLESS Post-Quantum Encryption](https://github.com/XTLS/Xray-core/pull/5067), [XHTTP: Beyond REALITY](https://github.com/XTLS/Xray-core/discussions/4113), [Announcement of NFTs by Project X](https://github.com/XTLS/Xray-core/discussions/3633)**
 
 ## License
 

app/dispatcher/default.go

@@ -29,7 +29,7 @@ var errSniffingTimeout = errors.New("timeout on sniffing")
 
 type cachedReader struct {
 	sync.Mutex
-	reader *pipe.Reader
+	reader buf.TimeoutReader // *pipe.Reader or *buf.TimeoutWrapperReader
 	cache  buf.MultiBuffer
 }
 
@@ -87,7 +87,9 @@ func (r *cachedReader) Interrupt() {
 		r.cache = buf.ReleaseMulti(r.cache)
 	}
 	r.Unlock()
-	r.reader.Interrupt()
+	if p, ok := r.reader.(*pipe.Reader); ok {
+		p.Interrupt()
+	}
 }
 
 // DefaultDispatcher is a default implementation of Dispatcher.
@@ -194,6 +196,47 @@ func (d *DefaultDispatcher) getLink(ctx context.Context) (*transport.Link, *tran
 	return inboundLink, outboundLink
 }
 
+func (d *DefaultDispatcher) WrapLink(ctx context.Context, link *transport.Link) *transport.Link {
+	sessionInbound := session.InboundFromContext(ctx)
+	var user *protocol.MemoryUser
+	if sessionInbound != nil {
+		user = sessionInbound.User
+	}
+
+	link.Reader = &buf.TimeoutWrapperReader{Reader: link.Reader}
+
+	if user != nil && len(user.Email) > 0 {
+		p := d.policy.ForLevel(user.Level)
+		if p.Stats.UserUplink {
+			name := "user>>>" + user.Email + ">>>traffic>>>uplink"
+			if c, _ := stats.GetOrRegisterCounter(d.stats, name); c != nil {
+				link.Reader.(*buf.TimeoutWrapperReader).Counter = c
+			}
+		}
+		if p.Stats.UserDownlink {
+			name := "user>>>" + user.Email + ">>>traffic>>>downlink"
+			if c, _ := stats.GetOrRegisterCounter(d.stats, name); c != nil {
+				link.Writer = &SizeStatWriter{
+					Counter: c,
+					Writer:  link.Writer,
+				}
+			}
+		}
+		if p.Stats.UserOnline {
+			name := "user>>>" + user.Email + ">>>online"
+			if om, _ := stats.GetOrRegisterOnlineMap(d.stats, name); om != nil {
+				sessionInbounds := session.InboundFromContext(ctx)
+				userIP := sessionInbounds.Source.Address.String()
+				om.AddIP(userIP)
+				// log Online user with ips
+				// errors.LogDebug(ctx, "user>>>" + user.Email + ">>>online", om.Count(), om.List())
+			}
+		}
+	}
+
+	return link
+}
+
 func (d *DefaultDispatcher) shouldOverride(ctx context.Context, result SniffResult, request session.SniffingRequest, destination net.Destination) bool {
 	domain := result.Domain()
 	if domain == "" {
@@ -314,12 +357,13 @@ func (d *DefaultDispatcher) DispatchLink(ctx context.Context, destination net.De
 		content = new(session.Content)
 		ctx = session.ContextWithContent(ctx, content)
 	}
+	outbound = d.WrapLink(ctx, outbound)
 	sniffingRequest := content.SniffingRequest
 	if !sniffingRequest.Enabled {
 		d.routedDispatch(ctx, outbound, destination)
 	} else {
 		cReader := &cachedReader{
-			reader: outbound.Reader.(*pipe.Reader),
+			reader: outbound.Reader.(buf.TimeoutReader),
 		}
 		outbound.Reader = cReader
 		result, err := sniffer(ctx, cReader, sniffingRequest.MetadataOnly, destination.Network)

app/dns/dns.go

@@ -329,7 +329,7 @@ func init() {
 }
 
 func checkSystemNetwork() (supportIPv4 bool, supportIPv6 bool) {
-	conn4, err4 := net.Dial("udp4", "8.8.8.8:53")
+	conn4, err4 := net.Dial("udp4", "192.33.4.12:53")
 	if err4 != nil {
 		supportIPv4 = false
 	} else {
@@ -337,7 +337,7 @@ func checkSystemNetwork() (supportIPv4 bool, supportIPv6 bool) {
 		conn4.Close()
 	}
 
-	conn6, err6 := net.Dial("udp6", "[2001:4860:4860::8888]:53")
+	conn6, err6 := net.Dial("udp6", "[2001:500:2::c]:53")
 	if err6 != nil {
 		supportIPv6 = false
 	} else {

app/dns/dnscommon_test.go

@@ -39,8 +39,8 @@ func Test_parseResponse(t *testing.T) {
 		common.Must2(dns.NewRR("google.com. IN CNAME fake.google.com")),
 		common.Must2(dns.NewRR("google.com. IN CNAME m.test.google.com")),
 		common.Must2(dns.NewRR("google.com. IN CNAME test.google.com")),
-		common.Must2(dns.NewRR("google.com. IN AAAA 2001::123:8888")),
-		common.Must2(dns.NewRR("google.com. IN AAAA 2001::123:8844")),
+		common.Must2(dns.NewRR("google.com. IN AAAA 2001:4860:4860::8888")),
+		common.Must2(dns.NewRR("google.com. IN AAAA 2001:4860:4860::8844")),
 	)
 	p = append(p, common.Must2(ans.Pack()))
 
@@ -72,7 +72,7 @@ func Test_parseResponse(t *testing.T) {
 		},
 		{
 			"aaaa record",
-			&IPRecord{2, []net.IP{net.ParseIP("2001::123:8888"), net.ParseIP("2001::123:8844")}, time.Time{}, dnsmessage.RCodeSuccess, nil},
+			&IPRecord{2, []net.IP{net.ParseIP("2001:4860:4860::8888"), net.ParseIP("2001:4860:4860::8844")}, time.Time{}, dnsmessage.RCodeSuccess, nil},
 			false,
 		},
 	}

app/dns/nameserver_udp.go

@@ -90,7 +90,9 @@ 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) {
-	ipRec, err := parseResponse(packet.Payload.Bytes())
+	payload := packet.Payload
+	ipRec, err := parseResponse(payload.Bytes())
+	payload.Release()
 	if err != nil {
 		errors.LogError(ctx, s.Name(), " fail to parse responded DNS udp")
 		return
@@ -125,6 +127,8 @@ func (s *ClassicNameServer) HandleResponse(ctx context.Context, packet *udp_prot
 			newReq.msg = &newMsg
 			s.addPendingRequest(&newReq)
 			b, _ := dns.PackMessage(newReq.msg)
+			copyDest := net.UDPDestination(s.address.Address, s.address.Port)
+			b.UDP = &copyDest
 			s.udpServer.Dispatch(toDnsContext(newReq.ctx, s.address.String()), *s.address, b)
 			return
 		}
@@ -158,6 +162,8 @@ func (s *ClassicNameServer) sendQuery(ctx context.Context, _ chan<- error, domai
 		}
 		s.addPendingRequest(udpReq)
 		b, _ := dns.PackMessage(req.msg)
+		copyDest := net.UDPDestination(s.address.Address, s.address.Port)
+		b.UDP = &copyDest
 		s.udpServer.Dispatch(toDnsContext(ctx, s.address.String()), *s.address, b)
 	}
 }

app/proxyman/outbound/handler.go

@@ -239,8 +239,10 @@ func (h *Handler) Dispatch(ctx context.Context, link *transport.Link) {
 	}
 out:
 	err := h.proxy.Process(ctx, link, h)
+	var errC error
 	if err != nil {
-		if goerrors.Is(err, io.EOF) || goerrors.Is(err, io.ErrClosedPipe) || goerrors.Is(err, context.Canceled) {
+		errC = errors.Cause(err)
+		if goerrors.Is(errC, io.EOF) || goerrors.Is(errC, io.ErrClosedPipe) || goerrors.Is(errC, context.Canceled) {
 			err = nil
 		}
 	}
@@ -251,7 +253,11 @@ out:
 		errors.LogInfo(ctx, err.Error())
 		common.Interrupt(link.Writer)
 	} else {
-		common.Close(link.Writer)
+		if errC != nil && goerrors.Is(errC, io.ErrClosedPipe) {
+			common.Interrupt(link.Writer)
+		} else {
+			common.Close(link.Writer)
+		}
 	}
 	common.Interrupt(link.Reader)
 }

app/reverse/bridge.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"time"
 
+	"github.com/xtls/xray-core/app/dispatcher"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/mux"
 	"github.com/xtls/xray-core/common/net"
@@ -148,25 +149,23 @@ func (w *BridgeWorker) Connections() uint32 {
 }
 
 func (w *BridgeWorker) handleInternalConn(link *transport.Link) {
-	go func() {
-		reader := link.Reader
-		for {
-			mb, err := reader.ReadMultiBuffer()
-			if err != nil {
+	reader := link.Reader
+	for {
+		mb, err := reader.ReadMultiBuffer()
+		if err != nil {
+			break
+		}
+		for _, b := range mb {
+			var ctl Control
+			if err := proto.Unmarshal(b.Bytes(), &ctl); err != nil {
+				errors.LogInfoInner(context.Background(), err, "failed to parse proto message")
 				break
 			}
-			for _, b := range mb {
-				var ctl Control
-				if err := proto.Unmarshal(b.Bytes(), &ctl); err != nil {
-					errors.LogInfoInner(context.Background(), err, "failed to parse proto message")
-					break
-				}
-				if ctl.State != w.state {
-					w.state = ctl.State
-				}
+			if ctl.State != w.state {
+				w.state = ctl.State
 			}
 		}
-	}()
+	}
 }
 
 func (w *BridgeWorker) Dispatch(ctx context.Context, dest net.Destination) (*transport.Link, error) {
@@ -181,7 +180,7 @@ func (w *BridgeWorker) Dispatch(ctx context.Context, dest net.Destination) (*tra
 	uplinkReader, uplinkWriter := pipe.New(opt...)
 	downlinkReader, downlinkWriter := pipe.New(opt...)
 
-	w.handleInternalConn(&transport.Link{
+	go w.handleInternalConn(&transport.Link{
 		Reader: downlinkReader,
 		Writer: uplinkWriter,
 	})
@@ -200,6 +199,7 @@ func (w *BridgeWorker) DispatchLink(ctx context.Context, dest net.Destination, l
 		return w.dispatcher.DispatchLink(ctx, dest, link)
 	}
 
+	link = w.dispatcher.(*dispatcher.DefaultDispatcher).WrapLink(ctx, link)
 	w.handleInternalConn(link)
 
 	return nil

common/buf/buffer.go

@@ -15,8 +15,6 @@ const (
 
 var ErrBufferFull = errors.New("buffer is full")
 
-var zero = [Size * 10]byte{0}
-
 var pool = bytespool.GetPool(Size)
 
 // ownership represents the data owner of the buffer.
@@ -146,7 +144,7 @@ func (b *Buffer) Bytes() []byte {
 }
 
 // Extend increases the buffer size by n bytes, and returns the extended part.
-// It panics if result size is larger than buf.Size.
+// It panics if result size is larger than size of this buffer.
 func (b *Buffer) Extend(n int32) []byte {
 	end := b.end + n
 	if end > int32(len(b.v)) {
@@ -154,7 +152,7 @@ func (b *Buffer) Extend(n int32) []byte {
 	}
 	ext := b.v[b.end:end]
 	b.end = end
-	copy(ext, zero[:])
+	clear(ext)
 	return ext
 }
 
@@ -217,7 +215,7 @@ func (b *Buffer) Resize(from, to int32) {
 	b.start += from
 	b.Check()
 	if b.end > oldEnd {
-		copy(b.v[oldEnd:b.end], zero[:])
+		clear(b.v[oldEnd:b.end])
 	}
 }
 

common/buf/io.go

@@ -24,9 +24,59 @@ var ErrReadTimeout = errors.New("IO timeout")
 
 // TimeoutReader is a reader that returns error if Read() operation takes longer than the given timeout.
 type TimeoutReader interface {
+	Reader
 	ReadMultiBufferTimeout(time.Duration) (MultiBuffer, error)
 }
 
+type TimeoutWrapperReader struct {
+	Reader
+	stats.Counter
+	mb   MultiBuffer
+	err  error
+	done chan struct{}
+}
+
+func (r *TimeoutWrapperReader) ReadMultiBuffer() (MultiBuffer, error) {
+	if r.done != nil {
+		<-r.done
+		r.done = nil
+		if r.Counter != nil {
+			r.Counter.Add(int64(r.mb.Len()))
+		}
+		return r.mb, r.err
+	}
+	r.mb, r.err = r.Reader.ReadMultiBuffer()
+	if r.Counter != nil {
+		r.Counter.Add(int64(r.mb.Len()))
+	}
+	return r.mb, r.err
+}
+
+func (r *TimeoutWrapperReader) ReadMultiBufferTimeout(duration time.Duration) (MultiBuffer, error) {
+	if r.done == nil {
+		r.done = make(chan struct{})
+		go func() {
+			r.mb, r.err = r.Reader.ReadMultiBuffer()
+			close(r.done)
+		}()
+	}
+	timeout := make(chan struct{})
+	go func() {
+		time.Sleep(duration)
+		close(timeout)
+	}()
+	select {
+	case <-r.done:
+		r.done = nil
+		if r.Counter != nil {
+			r.Counter.Add(int64(r.mb.Len()))
+		}
+		return r.mb, r.err
+	case <-timeout:
+		return nil, nil
+	}
+}
+
 // Writer extends io.Writer with MultiBuffer.
 type Writer interface {
 	// WriteMultiBuffer writes a MultiBuffer into underlying writer.

common/buf/writer.go

@@ -75,9 +75,10 @@ func (w *BufferToBytesWriter) ReadFrom(reader io.Reader) (int64, error) {
 // BufferedWriter is a Writer with internal buffer.
 type BufferedWriter struct {
 	sync.Mutex
-	writer   Writer
-	buffer   *Buffer
-	buffered bool
+	writer    Writer
+	buffer    *Buffer
+	buffered  bool
+	flushNext bool
 }
 
 // NewBufferedWriter creates a new BufferedWriter.
@@ -161,6 +162,12 @@ func (w *BufferedWriter) WriteMultiBuffer(b MultiBuffer) error {
 		}
 	}
 
+	if w.flushNext {
+		w.buffered = false
+		w.flushNext = false
+		return w.flushInternal()
+	}
+
 	return nil
 }
 
@@ -201,6 +208,13 @@ func (w *BufferedWriter) SetBuffered(f bool) error {
 	return nil
 }
 
+// SetFlushNext will wait the next WriteMultiBuffer to flush and set buffered = false
+func (w *BufferedWriter) SetFlushNext() {
+	w.Lock()
+	defer w.Unlock()
+	w.flushNext = true
+}
+
 // ReadFrom implements io.ReaderFrom.
 func (w *BufferedWriter) ReadFrom(reader io.Reader) (int64, error) {
 	if err := w.SetBuffered(false); err != nil {

common/common.go

@@ -7,6 +7,7 @@ import (
 	"go/build"
 	"os"
 	"path/filepath"
+	"reflect"
 	"strings"
 
 	"github.com/xtls/xray-core/common/errors"
@@ -153,3 +154,14 @@ func GetModuleName(pathToProjectRoot string) (string, error) {
 	}
 	return moduleName, fmt.Errorf("no `go.mod` file in every parent directory of `%s`", pathToProjectRoot)
 }
+
+// CloseIfExists call obj.Close() if obj is not nil.
+func CloseIfExists(obj any) error {
+	if obj != nil {
+		v := reflect.ValueOf(obj)
+		if !v.IsNil() {
+			return Close(obj)
+		}
+	}
+	return nil
+}

common/crypto/crypto.go

@@ -10,6 +10,9 @@ func RandBetween(from int64, to int64) int64 {
 	if from == to {
 		return from
 	}
+	if from > to {
+		from, to = to, from
+	}
 	bigInt, _ := rand.Int(rand.Reader, big.NewInt(to-from))
 	return from + bigInt.Int64()
 }

common/mux/client.go

@@ -2,6 +2,7 @@ package mux
 
 import (
 	"context"
+	goerrors "errors"
 	"io"
 	"sync"
 	"time"
@@ -154,8 +155,11 @@ func (f *DialingWorkerFactory) Create() (*ClientWorker, error) {
 		ctx := session.ContextWithOutbounds(context.Background(), outbounds)
 		ctx, cancel := context.WithCancel(ctx)
 
-		if err := p.Process(ctx, &transport.Link{Reader: uplinkReader, Writer: downlinkWriter}, d); err != nil {
-			errors.LogInfoInner(ctx, err, "failed to handler mux client connection")
+		if errP := p.Process(ctx, &transport.Link{Reader: uplinkReader, Writer: downlinkWriter}, d); errP != nil {
+			errC := errors.Cause(errP)
+			if !(goerrors.Is(errC, io.EOF) || goerrors.Is(errC, io.ErrClosedPipe) || goerrors.Is(errC, context.Canceled)) {
+				errors.LogInfoInner(ctx, errP, "failed to handler mux client connection")
+			}
 		}
 		common.Must(c.Close())
 		cancel()
@@ -222,7 +226,7 @@ func (m *ClientWorker) monitor() {
 		select {
 		case <-m.done.Wait():
 			m.sessionManager.Close()
-			common.Close(m.link.Writer)
+			common.Interrupt(m.link.Writer)
 			common.Interrupt(m.link.Reader)
 			return
 		case <-m.timer.C:
@@ -247,7 +251,7 @@ func writeFirstPayload(reader buf.Reader, writer *Writer) error {
 	return nil
 }
 
-func fetchInput(ctx context.Context, s *Session, output buf.Writer) {
+func fetchInput(ctx context.Context, s *Session, output buf.Writer, timer *time.Ticker) {
 	outbounds := session.OutboundsFromContext(ctx)
 	ob := outbounds[len(outbounds)-1]
 	transferType := protocol.TransferTypeStream
@@ -258,6 +262,7 @@ func fetchInput(ctx context.Context, s *Session, output buf.Writer) {
 	writer := NewWriter(s.ID, ob.Target, output, transferType, xudp.GetGlobalID(ctx))
 	defer s.Close(false)
 	defer writer.Close()
+	defer timer.Reset(time.Second * 16)
 
 	errors.LogInfo(ctx, "dispatching request to ", ob.Target)
 	if err := writeFirstPayload(s.input, writer); err != nil {
@@ -307,7 +312,11 @@ func (m *ClientWorker) Dispatch(ctx context.Context, link *transport.Link) bool
 	}
 	s.input = link.Reader
 	s.output = link.Writer
-	go fetchInput(ctx, s, m.link.Writer)
+	if _, ok := link.Reader.(*pipe.Reader); ok {
+		go fetchInput(ctx, s, m.link.Writer, m.timer)
+	} else {
+		fetchInput(ctx, s, m.link.Writer, m.timer)
+	}
 	return true
 }
 

common/mux/server.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"io"
 
+	"github.com/xtls/xray-core/app/dispatcher"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
@@ -61,6 +62,7 @@ func (s *Server) DispatchLink(ctx context.Context, dest net.Destination, link *t
 	if dest.Address != muxCoolAddress {
 		return s.dispatcher.DispatchLink(ctx, dest, link)
 	}
+	link = s.dispatcher.(*dispatcher.DefaultDispatcher).WrapLink(ctx, link)
 	_, err := NewServerWorker(ctx, s.dispatcher, link)
 	return err
 }
@@ -87,7 +89,14 @@ func NewServerWorker(ctx context.Context, d routing.Dispatcher, link *transport.
 		link:           link,
 		sessionManager: NewSessionManager(),
 	}
-	go worker.run(ctx)
+	if inbound := session.InboundFromContext(ctx); inbound != nil {
+		inbound.CanSpliceCopy = 3
+	}
+	if _, ok := link.Reader.(*pipe.Reader); ok {
+		go worker.run(ctx)
+	} else {
+		worker.run(ctx)
+	}
 	return worker, nil
 }
 
@@ -311,8 +320,8 @@ func (w *ServerWorker) run(ctx context.Context) {
 	reader := &buf.BufferedReader{Reader: w.link.Reader}
 
 	defer w.sessionManager.Close()
-	defer common.Close(w.link.Writer)
 	defer common.Interrupt(w.link.Reader)
+	defer common.Interrupt(w.link.Writer)
 
 	for {
 		select {

common/protocol/headers.go

@@ -79,20 +79,18 @@ type CommandSwitchAccount struct {
 }
 
 var (
-	hasGCMAsmAMD64 = cpu.X86.HasAES && cpu.X86.HasPCLMULQDQ
+	// Keep in sync with crypto/tls/cipher_suites.go.
+	hasGCMAsmAMD64 = cpu.X86.HasAES && cpu.X86.HasPCLMULQDQ && cpu.X86.HasSSE41 && cpu.X86.HasSSSE3
 	hasGCMAsmARM64 = cpu.ARM64.HasAES && cpu.ARM64.HasPMULL
-	// Keep in sync with crypto/aes/cipher_s390x.go.
-	hasGCMAsmS390X = cpu.S390X.HasAES && cpu.S390X.HasAESCBC && cpu.S390X.HasAESCTR &&
-		(cpu.S390X.HasGHASH || cpu.S390X.HasAESGCM)
+	hasGCMAsmS390X = cpu.S390X.HasAES && cpu.S390X.HasAESCTR && cpu.S390X.HasGHASH
+	hasGCMAsmPPC64 = runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le"
 
-	hasAESGCMHardwareSupport = runtime.GOARCH == "amd64" && hasGCMAsmAMD64 ||
-		runtime.GOARCH == "arm64" && hasGCMAsmARM64 ||
-		runtime.GOARCH == "s390x" && hasGCMAsmS390X
+	HasAESGCMHardwareSupport = hasGCMAsmAMD64 || hasGCMAsmARM64 || hasGCMAsmS390X || hasGCMAsmPPC64
 )
 
 func (sc *SecurityConfig) GetSecurityType() SecurityType {
 	if sc == nil || sc.Type == SecurityType_AUTO {
-		if hasAESGCMHardwareSupport {
+		if HasAESGCMHardwareSupport {
 			return SecurityType_AES128_GCM
 		}
 		return SecurityType_CHACHA20_POLY1305

common/protocol/http/client.go

@@ -0,0 +1,34 @@
+package http
+
+import (
+	"context"
+	gohttp "net/http"
+
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/transport/internet"
+)
+
+// NewClient creates an HTTP client with with internal dialer and using the given sockopt.
+// sockopt can only have one or empty.
+func NewClient(sockopt ...*internet.SocketConfig) *gohttp.Client {
+	var Sockopt *internet.SocketConfig
+	switch len(sockopt) {
+	case 0:
+	case 1:
+		Sockopt = sockopt[0]
+	default:
+		panic("sockopt can only be nil or have one")
+	}
+	httpClient := &gohttp.Client{
+		Transport: &gohttp.Transport{
+			DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
+				dest, err := net.ParseDestination(network + ":" + addr)
+				if err != nil {
+					return nil, err
+				}
+				return internet.DialSystem(ctx, dest, Sockopt)
+			},
+		},
+	}
+	return httpClient
+}

common/signal/timer.go

@@ -3,6 +3,7 @@ package signal
 import (
 	"context"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/xtls/xray-core/common"
@@ -14,10 +15,12 @@ type ActivityUpdater interface {
 }
 
 type ActivityTimer struct {
-	sync.RWMutex
+	mu        sync.RWMutex
 	updated   chan struct{}
 	checkTask *task.Periodic
 	onTimeout func()
+	consumed  atomic.Bool
+	once      sync.Once
 }
 
 func (t *ActivityTimer) Update() {
@@ -37,39 +40,39 @@ func (t *ActivityTimer) check() error {
 }
 
 func (t *ActivityTimer) finish() {
-	t.Lock()
-	defer t.Unlock()
+	t.once.Do(func() {
+		t.consumed.Store(true)
+		t.mu.Lock()
+		defer t.mu.Unlock()
 
-	if t.onTimeout != nil {
+		common.CloseIfExists(t.checkTask)
 		t.onTimeout()
-		t.onTimeout = nil
-	}
-	if t.checkTask != nil {
-		t.checkTask.Close()
-		t.checkTask = nil
-	}
+	})
 }
 
 func (t *ActivityTimer) SetTimeout(timeout time.Duration) {
+	if t.consumed.Load() {
+		return
+	}
 	if timeout == 0 {
 		t.finish()
 		return
 	}
 
-	checkTask := &task.Periodic{
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	// double check, just in case
+	if t.consumed.Load() {
+		return
+	}
+	newCheckTask := &task.Periodic{
 		Interval: timeout,
 		Execute:  t.check,
 	}
-
-	t.Lock()
-
-	if t.checkTask != nil {
-		t.checkTask.Close()
-	}
-	t.checkTask = checkTask
+	common.CloseIfExists(t.checkTask)
+	t.checkTask = newCheckTask
 	t.Update()
-	common.Must(checkTask.Start())
-	t.Unlock()
+	common.Must(newCheckTask.Start())
 }
 
 func CancelAfterInactivity(ctx context.Context, cancel context.CancelFunc, timeout time.Duration) *ActivityTimer {

core/core.go

@@ -18,8 +18,8 @@ import (
 
 var (
 	Version_x byte = 25
-	Version_y byte = 8
-	Version_z byte = 3
+	Version_y byte = 9
+	Version_z byte = 5
 )
 
 var (

go.mod

@@ -16,10 +16,10 @@ require (
 	github.com/sagernet/sing v0.5.1
 	github.com/sagernet/sing-shadowsocks v0.2.7
 	github.com/seiflotfy/cuckoofilter v0.0.0-20240715131351-a2f2c23f1771
-	github.com/stretchr/testify v1.10.0
+	github.com/stretchr/testify v1.11.1
 	github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e
 	github.com/vishvananda/netlink v1.3.1
-	github.com/xtls/reality v0.0.0-20250725142056-5b52a03d4fb7
+	github.com/xtls/reality v0.0.0-20250828044527-046fad5ab64f
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
 	golang.org/x/crypto v0.41.0
 	golang.org/x/net v0.43.0

go.sum

@@ -67,16 +67,16 @@ github.com/seiflotfy/cuckoofilter v0.0.0-20240715131351-a2f2c23f1771 h1:emzAzMZ1
 github.com/seiflotfy/cuckoofilter v0.0.0-20240715131351-a2f2c23f1771/go.mod h1:bR6DqgcAl1zTcOX8/pE2Qkj9XO00eCNqmKb7lXP8EAg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
-github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e h1:5QefA066A1tF8gHIiADmOVOV5LS43gt3ONnlEl3xkwI=
 github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e/go.mod h1:5t19P9LBIrNamL6AcMQOncg/r10y3Pc01AbHeMhwlpU=
 github.com/vishvananda/netlink v1.3.1 h1:3AEMt62VKqz90r0tmNhog0r/PpWKmrEShJU0wJW6bV0=
 github.com/vishvananda/netlink v1.3.1/go.mod h1:ARtKouGSTGchR8aMwmkzC0qiNPrrWO5JS/XMVl45+b4=
 github.com/vishvananda/netns v0.0.5 h1:DfiHV+j8bA32MFM7bfEunvT8IAqQ/NzSJHtcmW5zdEY=
 github.com/vishvananda/netns v0.0.5/go.mod h1:SpkAiCQRtJ6TvvxPnOSyH3BMl6unz3xZlaprSwhNNJM=
-github.com/xtls/reality v0.0.0-20250725142056-5b52a03d4fb7 h1:Ript0vN+nSO33+Vj4n0mgNY5M+oOxFQJdrJ1VnwTBO0=
-github.com/xtls/reality v0.0.0-20250725142056-5b52a03d4fb7/go.mod h1:XxvnCCgBee4WWE0bc4E+a7wbk8gkJ/rS0vNVNtC5qp0=
+github.com/xtls/reality v0.0.0-20250828044527-046fad5ab64f h1:o1Kryl9qEYYzNep9RId9DM1kBn8tBrcK5UJnti/l0NI=
+github.com/xtls/reality v0.0.0-20250828044527-046fad5ab64f/go.mod h1:XxvnCCgBee4WWE0bc4E+a7wbk8gkJ/rS0vNVNtC5qp0=
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
 go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=

infra/conf/vless.go

@@ -1,6 +1,7 @@
 package conf
 
 import (
+	"encoding/base64"
 	"encoding/json"
 	"path/filepath"
 	"runtime"
@@ -73,17 +74,67 @@ func (c *VLessInboundConfig) Build() (proto.Message, error) {
 		}
 
 		if account.Encryption != "" {
-			return nil, errors.New(`VLESS clients: "encryption" should not in inbound settings`)
+			return nil, errors.New(`VLESS clients: "encryption" should not be in inbound settings`)
 		}
 
 		user.Account = serial.ToTypedMessage(account)
 		config.Clients[idx] = user
 	}
 
-	if c.Decryption != "none" {
-		return nil, errors.New(`VLESS settings: please add/set "decryption":"none" to every settings`)
-	}
 	config.Decryption = c.Decryption
+	if !func() bool {
+		s := strings.Split(config.Decryption, ".")
+		if len(s) < 4 || s[0] != "mlkem768x25519plus" {
+			return false
+		}
+		switch s[1] {
+		case "native":
+		case "xorpub":
+			config.XorMode = 1
+		case "random":
+			config.XorMode = 2
+		default:
+			return false
+		}
+		t := strings.SplitN(strings.TrimSuffix(s[2], "s"), "-", 2)
+		i, err := strconv.Atoi(t[0])
+		if err != nil {
+			return false
+		}
+		config.SecondsFrom = int64(i)
+		if len(t) == 2 {
+			i, err := strconv.Atoi(t[1])
+			if err != nil {
+				return false
+			}
+			config.SecondsTo = int64(i)
+		}
+		padding := 0
+		for _, r := range s[3:] {
+			if len(r) < 20 {
+				padding += len(r) + 1
+				continue
+			}
+			if b, _ := base64.RawURLEncoding.DecodeString(r); len(b) != 32 && len(b) != 64 {
+				return false
+			}
+		}
+		config.Decryption = config.Decryption[27+len(s[2]):]
+		if padding > 0 {
+			config.Padding = config.Decryption[:padding-1]
+			config.Decryption = config.Decryption[padding:]
+		}
+		return true
+	}() && config.Decryption != "none" {
+		if config.Decryption == "" {
+			return nil, errors.New(`VLESS settings: please add/set "decryption":"none" to every settings`)
+		}
+		return nil, errors.New(`VLESS settings: unsupported "decryption": ` + config.Decryption)
+	}
+
+	if config.Decryption != "none" && c.Fallbacks != nil {
+		return nil, errors.New(`VLESS settings: "fallbacks" can not be used together with "decryption"`)
+	}
 
 	for _, fb := range c.Fallbacks {
 		var i uint16
@@ -155,16 +206,16 @@ type VLessOutboundConfig struct {
 func (c *VLessOutboundConfig) Build() (proto.Message, error) {
 	config := new(outbound.Config)
 
-	if len(c.Vnext) == 0 {
-		return nil, errors.New(`VLESS settings: "vnext" is empty`)
+	if len(c.Vnext) != 1 {
+		return nil, errors.New(`VLESS settings: "vnext" should have one and only one member`)
 	}
 	config.Vnext = make([]*protocol.ServerEndpoint, len(c.Vnext))
 	for idx, rec := range c.Vnext {
 		if rec.Address == nil {
 			return nil, errors.New(`VLESS vnext: "address" is not set`)
 		}
-		if len(rec.Users) == 0 {
-			return nil, errors.New(`VLESS vnext: "users" is empty`)
+		if len(rec.Users) != 1 {
+			return nil, errors.New(`VLESS vnext: "users" should have one and only one member`)
 		}
 		spec := &protocol.ServerEndpoint{
 			Address: rec.Address.Build(),
@@ -193,8 +244,48 @@ func (c *VLessOutboundConfig) Build() (proto.Message, error) {
 				return nil, errors.New(`VLESS users: "flow" doesn't support "` + account.Flow + `" in this version`)
 			}
 
-			if account.Encryption != "none" {
-				return nil, errors.New(`VLESS users: please add/set "encryption":"none" for every user`)
+			if !func() bool {
+				s := strings.Split(account.Encryption, ".")
+				if len(s) < 4 || s[0] != "mlkem768x25519plus" {
+					return false
+				}
+				switch s[1] {
+				case "native":
+				case "xorpub":
+					account.XorMode = 1
+				case "random":
+					account.XorMode = 2
+				default:
+					return false
+				}
+				switch s[2] {
+				case "1rtt":
+				case "0rtt":
+					account.Seconds = 1
+				default:
+					return false
+				}
+				padding := 0
+				for _, r := range s[3:] {
+					if len(r) < 20 {
+						padding += len(r) + 1
+						continue
+					}
+					if b, _ := base64.RawURLEncoding.DecodeString(r); len(b) != 32 && len(b) != 1184 {
+						return false
+					}
+				}
+				account.Encryption = account.Encryption[27+len(s[2]):]
+				if padding > 0 {
+					account.Padding = account.Encryption[:padding-1]
+					account.Encryption = account.Encryption[padding:]
+				}
+				return true
+			}() && account.Encryption != "none" {
+				if account.Encryption == "" {
+					return nil, errors.New(`VLESS users: please add/set "encryption":"none" for every user`)
+				}
+				return nil, errors.New(`VLESS users: unsupported "encryption": ` + account.Encryption)
 			}
 
 			user.Account = serial.ToTypedMessage(account)

main/commands/all/commands.go

@@ -17,5 +17,7 @@ func init() {
 		cmdX25519,
 		cmdWG,
 		cmdMLDSA65,
+		cmdMLKEM768,
+		cmdVLESSEnc,
 	)
 }

main/commands/all/convert/protobuf.go

@@ -3,6 +3,7 @@ package convert
 import (
 	"fmt"
 	"os"
+	"strings"
 
 	"github.com/xtls/xray-core/common/cmdarg"
 	creflect "github.com/xtls/xray-core/common/reflect"
@@ -14,15 +15,18 @@ import (
 
 var cmdProtobuf = &base.Command{
 	CustomFlags: true,
-	UsageLine:   "{{.Exec}} convert pb [-debug] [-type] [json file] [json file] ...",
+	UsageLine:   "{{.Exec}} convert pb [-outpbfile file] [-debug] [-type] [json file] [json file] ...",
 	Short:       "Convert multiple json configs to protobuf",
 	Long: `
-Convert multiple json configs to protobuf.
+Convert multiple configs to ProtoBuf. JSON, YAML and TOML can be used.
 
 Arguments:
 
+	-o file, -outpbfile file
+		Write the ProtoBuf output (eg. mix.pb) to specified file location.
+
 	-d, -debug
-		Show mix.pb as json.
+		Show mix.pb as JSON format.
 		FOR DEBUGGING ONLY!
 		DO NOT PASS THIS OUTPUT TO XRAY-CORE!
 
@@ -31,16 +35,20 @@ Arguments:
 
 Examples:
 
-    {{.Exec}} convert pb config.json c1.json c2.json c3.json > mix.pb
+    {{.Exec}} convert pb -outpbfile output.pb config.json c1.json c2.json c3.json
+    {{.Exec}} convert pb -debug mix.pb
 	`,
 	Run: executeConvertConfigsToProtobuf,
 }
 
 func executeConvertConfigsToProtobuf(cmd *base.Command, args []string) {
 
+	var optFile string
 	var optDump bool
 	var optType bool
 
+	cmd.Flag.StringVar(&optFile, "o", "", "")
+	cmd.Flag.StringVar(&optFile, "outpbfile", "", "")
 	cmd.Flag.BoolVar(&optDump, "d", false, "")
 	cmd.Flag.BoolVar(&optDump, "debug", false, "")
 	cmd.Flag.BoolVar(&optType, "t", false, "")
@@ -52,6 +60,17 @@ func executeConvertConfigsToProtobuf(cmd *base.Command, args []string) {
 		unnamedArgs.Set(v)
 	}
 
+	if len(optFile) > 0 {
+		switch core.GetFormatByExtension(getFileExtension(optFile)){
+		case "protobuf", "":
+			fmt.Println("Output ProtoBuf file is ", optFile)
+		default:
+			base.Fatalf("-outpbfile followed by a possible original config.")
+		}
+	} else if !optDump {
+		base.Fatalf("-outpbfile not specified")
+	}
+
 	if len(unnamedArgs) < 1 {
 		base.Fatalf("invalid config list length: %d", len(unnamedArgs))
 	}
@@ -70,12 +89,28 @@ func executeConvertConfigsToProtobuf(cmd *base.Command, args []string) {
 		}
 	}
 
-	bytesConfig, err := proto.Marshal(pbConfig)
-	if err != nil {
-		base.Fatalf("failed to marshal proto config: %s", err)
-	}
+	if len(optFile) > 0 {
+		bytesConfig, err := proto.Marshal(pbConfig)
+		if err != nil {
+			base.Fatalf("failed to marshal proto config: %s", err)
+		}
 
-	if _, err := os.Stdout.Write(bytesConfig); err != nil {
-		base.Fatalf("failed to write proto config: %s", err)
+		f, err := os.Create(optFile)
+		if err != nil {
+			base.Fatalf("failed to create proto file: %s", err)
+		}
+		defer f.Close()
+
+		if _, err := f.Write(bytesConfig); err != nil {
+			base.Fatalf("failed to write proto file: %s", err)
+		}
 	}
 }
+
+func getFileExtension(filename string) string {
+	idx := strings.LastIndexByte(filename, '.')
+	if idx == -1 {
+		return ""
+	}
+	return filename[idx+1:]
+}

main/commands/all/curve25519.go

@@ -1,17 +1,15 @@
 package all
 
 import (
+	"crypto/ecdh"
 	"crypto/rand"
 	"encoding/base64"
 	"fmt"
 
-	"golang.org/x/crypto/curve25519"
+	"lukechampine.com/blake3"
 )
 
 func Curve25519Genkey(StdEncoding bool, input_base64 string) {
-	var output string
-	var err error
-	var privateKey, publicKey []byte
 	var encoding *base64.Encoding
 	if *input_stdEncoding || StdEncoding {
 		encoding = base64.StdEncoding
@@ -19,40 +17,47 @@ func Curve25519Genkey(StdEncoding bool, input_base64 string) {
 		encoding = base64.RawURLEncoding
 	}
 
+	var privateKey []byte
 	if len(input_base64) > 0 {
-		privateKey, err = encoding.DecodeString(input_base64)
-		if err != nil {
-			output = err.Error()
-			goto out
-		}
-		if len(privateKey) != curve25519.ScalarSize {
-			output = "Invalid length of private key."
-			goto out
+		privateKey, _ = encoding.DecodeString(input_base64)
+		if len(privateKey) != 32 {
+			fmt.Println("Invalid length of X25519 private key.")
+			return
 		}
 	}
+	privateKey, password, hash32, err := genCurve25519(privateKey)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Printf("PrivateKey: %v\nPassword: %v\nHash32: %v\n",
+		encoding.EncodeToString(privateKey),
+		encoding.EncodeToString(password),
+		encoding.EncodeToString(hash32[:]))
+}
 
+func genCurve25519(inputPrivateKey []byte) (privateKey []byte, password []byte, hash32 [32]byte, returnErr error) {
+	if len(inputPrivateKey) > 0 {
+		privateKey = inputPrivateKey
+	}
 	if privateKey == nil {
-		privateKey = make([]byte, curve25519.ScalarSize)
-		if _, err = rand.Read(privateKey); err != nil {
-			output = err.Error()
-			goto out
-		}
+		privateKey = make([]byte, 32)
+		rand.Read(privateKey)
 	}
 
 	// Modify random bytes using algorithm described at:
-	// https://cr.yp.to/ecdh.html.
+	// https://cr.yp.to/ecdh.html
+	// (Just to make sure printing the real private key)
 	privateKey[0] &= 248
 	privateKey[31] &= 127
 	privateKey[31] |= 64
 
-	if publicKey, err = curve25519.X25519(privateKey, curve25519.Basepoint); err != nil {
-		output = err.Error()
-		goto out
+	key, err := ecdh.X25519().NewPrivateKey(privateKey)
+	if err != nil {
+		returnErr = err
+		return
 	}
-
-	output = fmt.Sprintf("Private key: %v\nPublic key: %v",
-		encoding.EncodeToString(privateKey),
-		encoding.EncodeToString(publicKey))
-out:
-	fmt.Println(output)
+	password = key.PublicKey().Bytes()
+	hash32 = blake3.Sum256(password)
+	return
 }

main/commands/all/mldsa65.go

@@ -11,9 +11,9 @@ import (
 
 var cmdMLDSA65 = &base.Command{
 	UsageLine: `{{.Exec}} mldsa65 [-i "seed (base64.RawURLEncoding)"]`,
-	Short:     `Generate key pair for ML-DSA-65 post-quantum signature`,
+	Short:     `Generate key pair for ML-DSA-65 post-quantum signature (REALITY)`,
 	Long: `
-Generate key pair for ML-DSA-65 post-quantum signature.
+Generate key pair for ML-DSA-65 post-quantum signature (REALITY).
 
 Random: {{.Exec}} mldsa65
 
@@ -25,18 +25,22 @@ func init() {
 	cmdMLDSA65.Run = executeMLDSA65 // break init loop
 }
 
-var input_seed = cmdMLDSA65.Flag.String("i", "", "")
+var input_mldsa65 = cmdMLDSA65.Flag.String("i", "", "")
 
 func executeMLDSA65(cmd *base.Command, args []string) {
 	var seed [32]byte
-	if len(*input_seed) > 0 {
-		s, _ := base64.RawURLEncoding.DecodeString(*input_seed)
+	if len(*input_mldsa65) > 0 {
+		s, _ := base64.RawURLEncoding.DecodeString(*input_mldsa65)
+		if len(s) != 32 {
+			fmt.Println("Invalid length of ML-DSA-65 seed.")
+			return
+		}
 		seed = [32]byte(s)
 	} else {
 		rand.Read(seed[:])
 	}
 	pub, _ := mldsa65.NewKeyFromSeed(&seed)
-	fmt.Printf("Seed: %v\nVerify: %v",
+	fmt.Printf("Seed: %v\nVerify: %v\n",
 		base64.RawURLEncoding.EncodeToString(seed[:]),
 		base64.RawURLEncoding.EncodeToString(pub.Bytes()))
 }

main/commands/all/mlkem768.go

@@ -0,0 +1,60 @@
+package all
+
+import (
+	"crypto/mlkem"
+	"crypto/rand"
+	"encoding/base64"
+	"fmt"
+
+	"github.com/xtls/xray-core/main/commands/base"
+	"lukechampine.com/blake3"
+)
+
+var cmdMLKEM768 = &base.Command{
+	UsageLine: `{{.Exec}} mlkem768 [-i "seed (base64.RawURLEncoding)"]`,
+	Short:     `Generate key pair for ML-KEM-768 post-quantum key exchange (VLESS Encryption)`,
+	Long: `
+Generate key pair for ML-KEM-768 post-quantum key exchange (VLESS Encryption).
+
+Random: {{.Exec}} mlkem768
+
+From seed: {{.Exec}} mlkem768 -i "seed (base64.RawURLEncoding)"
+`,
+}
+
+func init() {
+	cmdMLKEM768.Run = executeMLKEM768 // break init loop
+}
+
+var input_mlkem768 = cmdMLKEM768.Flag.String("i", "", "")
+
+func executeMLKEM768(cmd *base.Command, args []string) {
+	var seed [64]byte
+	if len(*input_mlkem768) > 0 {
+		s, _ := base64.RawURLEncoding.DecodeString(*input_mlkem768)
+		if len(s) != 64 {
+			fmt.Println("Invalid length of ML-KEM-768 seed.")
+			return
+		}
+		seed = [64]byte(s)
+	} else {
+		rand.Read(seed[:])
+	}
+	seed, client, hash32 := genMLKEM768(&seed)
+	fmt.Printf("Seed: %v\nClient: %v\nHash32: %v\n",
+		base64.RawURLEncoding.EncodeToString(seed[:]),
+		base64.RawURLEncoding.EncodeToString(client),
+		base64.RawURLEncoding.EncodeToString(hash32[:]))
+}
+
+func genMLKEM768(inputSeed *[64]byte) (seed [64]byte, client []byte, hash32 [32]byte) {
+	if inputSeed == nil {
+		rand.Read(seed[:])
+	} else {
+		seed = *inputSeed
+	}
+	key, _ := mlkem.NewDecapsulationKey768(seed[:])
+	client = key.EncapsulationKey().Bytes()
+	hash32 = blake3.Sum256(client)
+	return
+}

main/commands/all/uuid.go

@@ -9,9 +9,9 @@ import (
 
 var cmdUUID = &base.Command{
 	UsageLine: `{{.Exec}} uuid [-i "example"]`,
-	Short:     `Generate UUIDv4 or UUIDv5`,
+	Short:     `Generate UUIDv4 or UUIDv5 (VLESS)`,
 	Long: `
-Generate UUIDv4 or UUIDv5.
+Generate UUIDv4 or UUIDv5 (VLESS).
 
 UUIDv4 (random): {{.Exec}} uuid
 

main/commands/all/vlessenc.go

@@ -0,0 +1,41 @@
+package all
+
+import (
+	"encoding/base64"
+	"fmt"
+	"strings"
+
+	"github.com/xtls/xray-core/main/commands/base"
+)
+
+var cmdVLESSEnc = &base.Command{
+	UsageLine: `{{.Exec}} vlessenc`,
+	Short:     `Generate decryption/encryption json pair (VLESS Encryption)`,
+	Long: `
+Generate decryption/encryption json pair (VLESS Encryption).
+`,
+}
+
+func init() {
+	cmdVLESSEnc.Run = executeVLESSEnc // break init loop
+}
+
+func executeVLESSEnc(cmd *base.Command, args []string) {
+	privateKey, password, _, _ := genCurve25519(nil)
+	serverKey := base64.RawURLEncoding.EncodeToString(privateKey)
+	clientKey := base64.RawURLEncoding.EncodeToString(password)
+	decryption := generateDotConfig("mlkem768x25519plus", "native", "600s", serverKey)
+	encryption := generateDotConfig("mlkem768x25519plus", "native", "0rtt", clientKey)
+	seed, client, _ := genMLKEM768(nil)
+	serverKeyPQ := base64.RawURLEncoding.EncodeToString(seed[:])
+	clientKeyPQ := base64.RawURLEncoding.EncodeToString(client)
+	decryptionPQ := generateDotConfig("mlkem768x25519plus", "native", "600s", serverKeyPQ)
+	encryptionPQ := generateDotConfig("mlkem768x25519plus", "native", "0rtt", clientKeyPQ)
+	fmt.Printf("Choose one Authentication to use, do not mix them. Ephemeral key exchange is Post-Quantum safe anyway.\n\n")
+	fmt.Printf("Authentication: X25519, not Post-Quantum\n\"decryption\": \"%v\"\n\"encryption\": \"%v\"\n\n", decryption, encryption)
+	fmt.Printf("Authentication: ML-KEM-768, Post-Quantum\n\"decryption\": \"%v\"\n\"encryption\": \"%v\"\n", decryptionPQ, encryptionPQ)
+}
+
+func generateDotConfig(fields ...string) string {
+	return strings.Join(fields, ".")
+}

main/commands/all/wg.go

@@ -6,9 +6,9 @@ import (
 
 var cmdWG = &base.Command{
 	UsageLine: `{{.Exec}} wg [-i "private key (base64.StdEncoding)"]`,
-	Short:     `Generate key pair for wireguard key exchange`,
+	Short:     `Generate key pair for X25519 key exchange (WireGuard)`,
 	Long: `
-Generate key pair for wireguard key exchange.
+Generate key pair for X25519 key exchange (WireGuard).
 
 Random: {{.Exec}} wg
 

main/commands/all/x25519.go

@@ -6,9 +6,9 @@ import (
 
 var cmdX25519 = &base.Command{
 	UsageLine: `{{.Exec}} x25519 [-i "private key (base64.RawURLEncoding)"] [--std-encoding]`,
-	Short:     `Generate key pair for x25519 key exchange`,
+	Short:     `Generate key pair for X25519 key exchange (REALITY, VLESS Encryption)`,
 	Long: `
-Generate key pair for x25519 key exchange.
+Generate key pair for X25519 key exchange (REALITY, VLESS Encryption).
 
 Random: {{.Exec}} x25519
 

main/run.go

@@ -182,12 +182,15 @@ func getConfigFilePath(verbose bool) cmdarg.Arg {
 	}
 
 	if workingDir, err := os.Getwd(); err == nil {
-		configFile := filepath.Join(workingDir, "config.json")
-		if fileExists(configFile) {
-			if verbose {
-				log.Println("Using default config: ", configFile)
+		suffixes := []string{".json", ".jsonc", ".toml", ".yaml", ".yml"}
+		for _, suffix := range suffixes {
+			configFile := filepath.Join(workingDir, "config"+suffix)
+			if fileExists(configFile) {
+				if verbose {
+					log.Println("Using default config: ", configFile)
+				}
+				return cmdarg.Arg{configFile}
 			}
-			return cmdarg.Arg{configFile}
 		}
 	}
 

proxy/dns/dns.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	go_errors "errors"
 	"io"
+	"strings"
 	"sync"
 	"time"
 
@@ -168,11 +169,15 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, d internet.
 	}
 
 	ctx, cancel := context.WithCancel(ctx)
-	timer := signal.CancelAfterInactivity(ctx, cancel, h.timeout)
+	terminate := func() {
+		cancel()
+		conn.Close()
+	}
+	timer := signal.CancelAfterInactivity(ctx, terminate, h.timeout)
+	defer timer.SetTimeout(0)
 
 	request := func() error {
-		defer conn.Close()
-
+		defer timer.SetTimeout(0)
 		for {
 			b, err := reader.ReadMessage()
 			if err == io.EOF {
@@ -190,24 +195,33 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, d internet.
 				if len(h.blockTypes) > 0 {
 					for _, blocktype := range h.blockTypes {
 						if blocktype == int32(qType) {
-							if h.nonIPQuery == "reject" {
-								go h.rejectNonIPQuery(id, qType, domain, writer)
-							}
+							b.Release()
 							errors.LogInfo(ctx, "blocked type ", qType, " query for domain ", domain)
+							if h.nonIPQuery == "reject" {
+								err := h.rejectNonIPQuery(id, qType, domain, writer)
+								if err != nil {
+									return err
+								}
+							}
 							return nil
 						}
 					}
 				}
 				if isIPQuery {
-					go h.handleIPQuery(id, qType, domain, writer)
+					b.Release()
+					go h.handleIPQuery(id, qType, domain, writer, timer)
+					continue
 				}
-				if isIPQuery || h.nonIPQuery == "drop" {
+				if h.nonIPQuery == "drop" {
 					b.Release()
 					continue
 				}
 				if h.nonIPQuery == "reject" {
-					go h.rejectNonIPQuery(id, qType, domain, writer)
 					b.Release()
+					err := h.rejectNonIPQuery(id, qType, domain, writer)
+					if err != nil {
+						return err
+					}
 					continue
 				}
 			}
@@ -219,6 +233,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, d internet.
 	}
 
 	response := func() error {
+		defer timer.SetTimeout(0)
 		for {
 			b, err := connReader.ReadMessage()
 			if err == io.EOF {
@@ -244,7 +259,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, d internet.
 	return nil
 }
 
-func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string, writer dns_proto.MessageWriter) {
+func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string, writer dns_proto.MessageWriter, timer *signal.ActivityTimer) {
 	var ips []net.IP
 	var err error
 
@@ -319,16 +334,21 @@ func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string,
 	if err != nil {
 		errors.LogInfoInner(context.Background(), err, "pack message")
 		b.Release()
-		return
+		timer.SetTimeout(0)
 	}
 	b.Resize(0, int32(len(msgBytes)))
 
 	if err := writer.WriteMessage(b); err != nil {
 		errors.LogInfoInner(context.Background(), err, "write IP answer")
+		timer.SetTimeout(0)
 	}
 }
 
-func (h *Handler) rejectNonIPQuery(id uint16, qType dnsmessage.Type, domain string, writer dns_proto.MessageWriter) {
+func (h *Handler) rejectNonIPQuery(id uint16, qType dnsmessage.Type, domain string, writer dns_proto.MessageWriter) error {
+	domainT := strings.TrimSuffix(domain, ".")
+	if domainT == "" {
+		return errors.New("empty domain name")
+	}
 	b := buf.New()
 	rawBytes := b.Extend(buf.Size)
 	builder := dnsmessage.NewBuilder(rawBytes[:0], dnsmessage.Header{
@@ -349,20 +369,22 @@ func (h *Handler) rejectNonIPQuery(id uint16, qType dnsmessage.Type, domain stri
 	if err != nil {
 		errors.LogInfo(context.Background(), "unexpected domain ", domain, " when building reject message: ", err)
 		b.Release()
-		return
+		return err
 	}
 
 	msgBytes, err := builder.Finish()
 	if err != nil {
 		errors.LogInfoInner(context.Background(), err, "pack reject message")
 		b.Release()
-		return
+		return err
 	}
 	b.Resize(0, int32(len(msgBytes)))
 
 	if err := writer.WriteMessage(b); err != nil {
 		errors.LogInfoInner(context.Background(), err, "write reject answer")
+		return err
 	}
+	return nil
 }
 
 type outboundConn struct {
@@ -371,6 +393,7 @@ type outboundConn struct {
 
 	conn      net.Conn
 	connReady chan struct{}
+	closed    bool
 }
 
 func (c *outboundConn) dial() error {
@@ -385,12 +408,16 @@ func (c *outboundConn) dial() error {
 
 func (c *outboundConn) Write(b []byte) (int, error) {
 	c.access.Lock()
+	if c.closed {
+		c.access.Unlock()
+		return 0, errors.New("outbound connection closed")
+	}
 
 	if c.conn == nil {
 		if err := c.dial(); err != nil {
 			c.access.Unlock()
 			errors.LogWarningInner(context.Background(), err, "failed to dial outbound connection")
-			return len(b), nil
+			return 0, err
 		}
 	}
 
@@ -400,24 +427,27 @@ func (c *outboundConn) Write(b []byte) (int, error) {
 }
 
 func (c *outboundConn) Read(b []byte) (int, error) {
-	var conn net.Conn
 	c.access.Lock()
-	conn = c.conn
-	c.access.Unlock()
+	if c.closed {
+		c.access.Unlock()
+		return 0, io.EOF
+	}
 
-	if conn == nil {
+	if c.conn == nil {
+		c.access.Unlock()
 		_, open := <-c.connReady
 		if !open {
 			return 0, io.EOF
 		}
-		conn = c.conn
+		return c.conn.Read(b)
 	}
-
-	return conn.Read(b)
+	c.access.Unlock()
+	return c.conn.Read(b)
 }
 
 func (c *outboundConn) Close() error {
 	c.access.Lock()
+	c.closed = true
 	close(c.connReady)
 	if c.conn != nil {
 		c.conn.Close()

proxy/dokodemo/dokodemo.go

@@ -2,10 +2,8 @@ package dokodemo
 
 import (
 	"context"
-	"runtime"
 	"strconv"
 	"strings"
-	"sync/atomic"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
@@ -14,11 +12,10 @@ import (
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol"
 	"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/core"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tls"
 )
@@ -144,39 +141,11 @@ func (d *DokodemoDoor) Process(ctx context.Context, network net.Network, conn st
 	})
 	errors.LogInfo(ctx, "received request for ", conn.RemoteAddr())
 
-	plcy := d.policy()
-	ctx, cancel := context.WithCancel(ctx)
-	timer := signal.CancelAfterInactivity(ctx, cancel, plcy.Timeouts.ConnectionIdle)
-
-	if inbound != nil {
-		inbound.Timer = timer
-	}
-
-	ctx = policy.ContextWithBufferPolicy(ctx, plcy.Buffer)
-	link, err := dispatcher.Dispatch(ctx, dest)
-	if err != nil {
-		return errors.New("failed to dispatch request").Base(err)
-	}
-
-	requestCount := int32(1)
-	requestDone := func() error {
-		defer func() {
-			if atomic.AddInt32(&requestCount, -1) == 0 {
-				timer.SetTimeout(plcy.Timeouts.DownlinkOnly)
-			}
-		}()
-
-		var reader buf.Reader
-		if dest.Network == net.Network_UDP {
-			reader = buf.NewPacketReader(conn)
-		} else {
-			reader = buf.NewReader(conn)
-		}
-		if err := buf.Copy(reader, link.Writer, buf.UpdateActivity(timer)); err != nil {
-			return errors.New("failed to transport request").Base(err)
-		}
-
-		return nil
+	var reader buf.Reader
+	if dest.Network == net.Network_TCP {
+		reader = buf.NewReader(conn)
+	} else {
+		reader = buf.NewPacketReader(conn)
 	}
 
 	var writer buf.Writer
@@ -208,72 +177,17 @@ func (d *DokodemoDoor) Process(ctx context.Context, network net.Network, conn st
 				return err
 			}
 			writer = NewPacketWriter(pConn, &dest, mark, back)
-			defer func() {
-				runtime.Gosched()
-				common.Interrupt(link.Reader) // maybe duplicated
-				runtime.Gosched()
-				writer.(*PacketWriter).Close() // close fake UDP conns
-			}()
-			/*
-				sockopt := &internet.SocketConfig{
-					Tproxy: internet.SocketConfig_TProxy,
-				}
-				if dest.Address.Family().IsIP() {
-					sockopt.BindAddress = dest.Address.IP()
-					sockopt.BindPort = uint32(dest.Port)
-				}
-				if d.sockopt != nil {
-					sockopt.Mark = d.sockopt.Mark
-				}
-				tConn, err := internet.DialSystem(ctx, net.DestinationFromAddr(conn.RemoteAddr()), sockopt)
-				if err != nil {
-					return err
-				}
-				defer tConn.Close()
-
-				writer = &buf.SequentialWriter{Writer: tConn}
-				tReader := buf.NewPacketReader(tConn)
-				requestCount++
-				tproxyRequest = func() error {
-					defer func() {
-						if atomic.AddInt32(&requestCount, -1) == 0 {
-							timer.SetTimeout(plcy.Timeouts.DownlinkOnly)
-						}
-					}()
-					if err := buf.Copy(tReader, link.Writer, buf.UpdateActivity(timer)); err != nil {
-						return errors.New("failed to transport request (TPROXY conn)").Base(err)
-					}
-					return nil
-				}
-			*/
+			defer writer.(*PacketWriter).Close() // close fake UDP conns
 		}
 	}
 
-	responseDone := func() error {
-		defer timer.SetTimeout(plcy.Timeouts.UplinkOnly)
-
-		if network == net.Network_UDP && destinationOverridden {
-			buf.Copy(link.Reader, writer) // respect upload's timeout
-			return nil
-		}
-
-		if err := buf.Copy(link.Reader, writer, buf.UpdateActivity(timer)); err != nil {
-			return errors.New("failed to transport response").Base(err)
-		}
-		return nil
+	if err := dispatcher.DispatchLink(ctx, dest, &transport.Link{
+		Reader: reader,
+		Writer: writer},
+	); err != nil {
+		return errors.New("failed to dispatch request").Base(err)
 	}
-
-	if err := task.Run(ctx,
-		task.OnSuccess(func() error { return task.Run(ctx, requestDone) }, task.Close(link.Writer)),
-		responseDone); err != nil {
-		runtime.Gosched()
-		common.Interrupt(link.Writer)
-		runtime.Gosched()
-		common.Interrupt(link.Reader)
-		return errors.New("connection ends").Base(err)
-	}
-
-	return nil
+	return nil // Unlike Dispatch(), DispatchLink() will not return until the outbound finishes Process()
 }
 
 func NewPacketWriter(conn net.PacketConn, d *net.Destination, mark int, back *net.UDPAddr) buf.Writer {

proxy/freedom/freedom.go

@@ -26,7 +26,6 @@ import (
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/stat"
-	"github.com/xtls/xray-core/transport/internet/tls"
 )
 
 var useSplice bool
@@ -73,7 +72,7 @@ func isValidAddress(addr *net.IPOrDomain) bool {
 	}
 
 	a := addr.AsAddress()
-	return a != net.AnyIP
+	return a != net.AnyIP && a != net.AnyIPv6
 }
 
 // Process implements proxy.Outbound.
@@ -212,16 +211,14 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 
 	responseDone := func() error {
 		defer timer.SetTimeout(plcy.Timeouts.UplinkOnly)
-		if destination.Network == net.Network_TCP {
+		if destination.Network == net.Network_TCP && useSplice && proxy.IsRAWTransportWithoutSecurity(conn) { // it would be tls conn in special use case of MITM, we need to let link handle traffic
 			var writeConn net.Conn
 			var inTimer *signal.ActivityTimer
-			if inbound := session.InboundFromContext(ctx); inbound != nil && inbound.Conn != nil && useSplice {
+			if inbound := session.InboundFromContext(ctx); inbound != nil && inbound.Conn != nil {
 				writeConn = inbound.Conn
 				inTimer = inbound.Timer
 			}
-			if !isTLSConn(conn) { // it would be tls conn in special use case of MITM, we need to let link handle traffic
-				return proxy.CopyRawConnIfExist(ctx, conn, writeConn, link.Writer, timer, inTimer)
-			}
+			return proxy.CopyRawConnIfExist(ctx, conn, writeConn, link.Writer, timer, inTimer)
 		}
 		var reader buf.Reader
 		if destination.Network == net.Network_TCP {
@@ -246,22 +243,6 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	return nil
 }
 
-func isTLSConn(conn stat.Connection) bool {
-	if conn != nil {
-		statConn, ok := conn.(*stat.CounterConnection)
-		if ok {
-			conn = statConn.Connection
-		}
-		if _, ok := conn.(*tls.Conn); ok {
-			return true
-		}
-		if _, ok := conn.(*tls.UConn); ok {
-			return true
-		}
-	}
-	return false
-}
-
 func NewPacketReader(conn net.Conn, UDPOverride net.Destination, DialDest net.Destination) buf.Reader {
 	iConn := conn
 	statConn, ok := iConn.(*stat.CounterConnection)
@@ -418,7 +399,7 @@ func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 					}
 				}
 			}
-			destAddr, _ := net.ResolveUDPAddr("udp", b.UDP.NetAddr())
+			destAddr := b.UDP.RawNetAddr()
 			if destAddr == nil {
 				b.Release()
 				continue

proxy/http/server.go

@@ -18,11 +18,12 @@ import (
 	"github.com/xtls/xray-core/common/protocol"
 	http_proto "github.com/xtls/xray-core/common/protocol/http"
 	"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/core"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/proxy"
+	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
@@ -95,6 +96,9 @@ func (s *Server) ProcessWithFirstbyte(ctx context.Context, network net.Network,
 	inbound.User = &protocol.MemoryUser{
 		Level: s.config.UserLevel,
 	}
+	if !proxy.IsRAWTransportWithoutSecurity(conn) {
+		inbound.CanSpliceCopy = 3
+	}
 	var reader *bufio.Reader
 	if len(firstbyte) > 0 {
 		readerWithoutFirstbyte := bufio.NewReaderSize(readerOnly{conn}, buf.Size)
@@ -169,62 +173,31 @@ Start:
 	return err
 }
 
-func (s *Server) handleConnect(ctx context.Context, _ *http.Request, reader *bufio.Reader, conn stat.Connection, dest net.Destination, dispatcher routing.Dispatcher, inbound *session.Inbound) error {
+func (s *Server) handleConnect(ctx context.Context, _ *http.Request, buffer *bufio.Reader, conn stat.Connection, dest net.Destination, dispatcher routing.Dispatcher, inbound *session.Inbound) error {
 	_, err := conn.Write([]byte("HTTP/1.1 200 Connection established\r\n\r\n"))
 	if err != nil {
 		return errors.New("failed to write back OK response").Base(err)
 	}
 
-	plcy := s.policy()
-	ctx, cancel := context.WithCancel(ctx)
-	timer := signal.CancelAfterInactivity(ctx, cancel, plcy.Timeouts.ConnectionIdle)
-
-	if inbound != nil {
-		inbound.Timer = timer
-	}
-
-	ctx = policy.ContextWithBufferPolicy(ctx, plcy.Buffer)
-	link, err := dispatcher.Dispatch(ctx, dest)
-	if err != nil {
-		return err
-	}
-
-	if reader.Buffered() > 0 {
-		payload, err := buf.ReadFrom(io.LimitReader(reader, int64(reader.Buffered())))
+	reader := buf.NewReader(conn)
+	if buffer.Buffered() > 0 {
+		payload, err := buf.ReadFrom(io.LimitReader(buffer, int64(buffer.Buffered())))
 		if err != nil {
 			return err
 		}
-		if err := link.Writer.WriteMultiBuffer(payload); err != nil {
-			return err
-		}
-		reader = nil
+		reader = &buf.BufferedReader{Reader: reader, Buffer: payload}
+		buffer = nil
 	}
 
-	requestDone := func() error {
-		defer timer.SetTimeout(plcy.Timeouts.DownlinkOnly)
-
-		return buf.Copy(buf.NewReader(conn), link.Writer, buf.UpdateActivity(timer))
-	}
-
-	responseDone := func() error {
+	if inbound.CanSpliceCopy == 2 {
 		inbound.CanSpliceCopy = 1
-		defer timer.SetTimeout(plcy.Timeouts.UplinkOnly)
-
-		v2writer := buf.NewWriter(conn)
-		if err := buf.Copy(link.Reader, v2writer, buf.UpdateActivity(timer)); err != nil {
-			return err
-		}
-
-		return nil
 	}
-
-	closeWriter := task.OnSuccess(requestDone, task.Close(link.Writer))
-	if err := task.Run(ctx, closeWriter, responseDone); err != nil {
-		common.Interrupt(link.Reader)
-		common.Interrupt(link.Writer)
-		return errors.New("connection ends").Base(err)
+	if err := dispatcher.DispatchLink(ctx, dest, &transport.Link{
+		Reader: reader,
+		Writer: buf.NewWriter(conn)},
+	); err != nil {
+		return errors.New("failed to dispatch request").Base(err)
 	}
-
 	return nil
 }
 

proxy/proxy.go

@@ -25,6 +25,7 @@ import (
 	"github.com/xtls/xray-core/common/signal"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/features/stats"
+	"github.com/xtls/xray-core/proxy/vless/encryption"
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/reality"
@@ -176,63 +177,109 @@ type VisionReader struct {
 	trafficState *TrafficState
 	ctx          context.Context
 	isUplink     bool
+	conn         net.Conn
+	input        *bytes.Reader
+	rawInput     *bytes.Buffer
+	ob           *session.Outbound
+
+	// internal
+	directReadCounter stats.Counter
 }
 
-func NewVisionReader(reader buf.Reader, state *TrafficState, isUplink bool, context context.Context) *VisionReader {
+func NewVisionReader(reader buf.Reader, trafficState *TrafficState, isUplink bool, ctx context.Context, conn net.Conn, input *bytes.Reader, rawInput *bytes.Buffer, ob *session.Outbound) *VisionReader {
 	return &VisionReader{
 		Reader:       reader,
-		trafficState: state,
-		ctx:          context,
+		trafficState: trafficState,
+		ctx:          ctx,
 		isUplink:     isUplink,
+		conn:         conn,
+		input:        input,
+		rawInput:     rawInput,
+		ob:           ob,
 	}
 }
 
 func (w *VisionReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
 	buffer, err := w.Reader.ReadMultiBuffer()
-	if !buffer.IsEmpty() {
-		var withinPaddingBuffers *bool
-		var remainingContent *int32
-		var remainingPadding *int32
-		var currentCommand *int
-		var switchToDirectCopy *bool
-		if w.isUplink {
-			withinPaddingBuffers = &w.trafficState.Inbound.WithinPaddingBuffers
-			remainingContent = &w.trafficState.Inbound.RemainingContent
-			remainingPadding = &w.trafficState.Inbound.RemainingPadding
-			currentCommand = &w.trafficState.Inbound.CurrentCommand
-			switchToDirectCopy = &w.trafficState.Inbound.UplinkReaderDirectCopy
-		} else {
-			withinPaddingBuffers = &w.trafficState.Outbound.WithinPaddingBuffers
-			remainingContent = &w.trafficState.Outbound.RemainingContent
-			remainingPadding = &w.trafficState.Outbound.RemainingPadding
-			currentCommand = &w.trafficState.Outbound.CurrentCommand
-			switchToDirectCopy = &w.trafficState.Outbound.DownlinkReaderDirectCopy
-		}
+	if buffer.IsEmpty() {
+		return buffer, err
+	}
 
-		if *withinPaddingBuffers || w.trafficState.NumberOfPacketToFilter > 0 {
-			mb2 := make(buf.MultiBuffer, 0, len(buffer))
-			for _, b := range buffer {
-				newbuffer := XtlsUnpadding(b, w.trafficState, w.isUplink, w.ctx)
-				if newbuffer.Len() > 0 {
-					mb2 = append(mb2, newbuffer)
-				}
-			}
-			buffer = mb2
-			if *remainingContent > 0 || *remainingPadding > 0 || *currentCommand == 0 {
-				*withinPaddingBuffers = true
-			} else if *currentCommand == 1 {
-				*withinPaddingBuffers = false
-			} else if *currentCommand == 2 {
-				*withinPaddingBuffers = false
-				*switchToDirectCopy = true
-			} else {
-				errors.LogInfo(w.ctx, "XtlsRead unknown command ", *currentCommand, buffer.Len())
+	var withinPaddingBuffers *bool
+	var remainingContent *int32
+	var remainingPadding *int32
+	var currentCommand *int
+	var switchToDirectCopy *bool
+	if w.isUplink {
+		withinPaddingBuffers = &w.trafficState.Inbound.WithinPaddingBuffers
+		remainingContent = &w.trafficState.Inbound.RemainingContent
+		remainingPadding = &w.trafficState.Inbound.RemainingPadding
+		currentCommand = &w.trafficState.Inbound.CurrentCommand
+		switchToDirectCopy = &w.trafficState.Inbound.UplinkReaderDirectCopy
+	} else {
+		withinPaddingBuffers = &w.trafficState.Outbound.WithinPaddingBuffers
+		remainingContent = &w.trafficState.Outbound.RemainingContent
+		remainingPadding = &w.trafficState.Outbound.RemainingPadding
+		currentCommand = &w.trafficState.Outbound.CurrentCommand
+		switchToDirectCopy = &w.trafficState.Outbound.DownlinkReaderDirectCopy
+	}
+
+	if *switchToDirectCopy {
+		if w.directReadCounter != nil {
+			w.directReadCounter.Add(int64(buffer.Len()))
+		}
+		return buffer, err
+	}
+
+	if *withinPaddingBuffers || w.trafficState.NumberOfPacketToFilter > 0 {
+		mb2 := make(buf.MultiBuffer, 0, len(buffer))
+		for _, b := range buffer {
+			newbuffer := XtlsUnpadding(b, w.trafficState, w.isUplink, w.ctx)
+			if newbuffer.Len() > 0 {
+				mb2 = append(mb2, newbuffer)
 			}
 		}
-		if w.trafficState.NumberOfPacketToFilter > 0 {
-			XtlsFilterTls(buffer, w.trafficState, w.ctx)
+		buffer = mb2
+		if *remainingContent > 0 || *remainingPadding > 0 || *currentCommand == 0 {
+			*withinPaddingBuffers = true
+		} else if *currentCommand == 1 {
+			*withinPaddingBuffers = false
+		} else if *currentCommand == 2 {
+			*withinPaddingBuffers = false
+			*switchToDirectCopy = true
+		} else {
+			errors.LogInfo(w.ctx, "XtlsRead unknown command ", *currentCommand, buffer.Len())
 		}
 	}
+	if w.trafficState.NumberOfPacketToFilter > 0 {
+		XtlsFilterTls(buffer, w.trafficState, w.ctx)
+	}
+
+	if *switchToDirectCopy {
+		// XTLS Vision processes TLS-like conn's input and rawInput
+		if inputBuffer, err := buf.ReadFrom(w.input); err == nil && !inputBuffer.IsEmpty() {
+			buffer, _ = buf.MergeMulti(buffer, inputBuffer)
+		}
+		if rawInputBuffer, err := buf.ReadFrom(w.rawInput); err == nil && !rawInputBuffer.IsEmpty() {
+			buffer, _ = buf.MergeMulti(buffer, rawInputBuffer)
+		}
+		*w.input = bytes.Reader{} // release memory
+		w.input = nil
+		*w.rawInput = bytes.Buffer{} // release memory
+		w.rawInput = nil
+
+		if inbound := session.InboundFromContext(w.ctx); inbound != nil && inbound.Conn != nil {
+			if w.isUplink && inbound.CanSpliceCopy == 2 {
+				inbound.CanSpliceCopy = 1
+			}
+			if !w.isUplink && w.ob != nil && w.ob.CanSpliceCopy == 2 { // ob need to be passed in due to context can have more than one ob
+				w.ob.CanSpliceCopy = 1
+			}
+		}
+		readerConn, readCounter, _ := UnwrapRawConn(w.conn)
+		w.directReadCounter = readCounter
+		w.Reader = buf.NewReader(readerConn)
+	}
 	return buffer, err
 }
 
@@ -240,28 +287,32 @@ func (w *VisionReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
 // Note Vision probably only make sense as the inner most layer of writer, since it need assess traffic state from origin proxy traffic
 type VisionWriter struct {
 	buf.Writer
-	trafficState      *TrafficState
-	ctx               context.Context
-	writeOnceUserUUID []byte
-	isUplink          bool
+	trafficState *TrafficState
+	ctx          context.Context
+	isUplink     bool
+	conn         net.Conn
+	ob           *session.Outbound
+
+	// internal
+	writeOnceUserUUID  []byte
+	directWriteCounter stats.Counter
 }
 
-func NewVisionWriter(writer buf.Writer, state *TrafficState, isUplink bool, context context.Context) *VisionWriter {
-	w := make([]byte, len(state.UserUUID))
-	copy(w, state.UserUUID)
+func NewVisionWriter(writer buf.Writer, trafficState *TrafficState, isUplink bool, ctx context.Context, conn net.Conn, ob *session.Outbound) *VisionWriter {
+	w := make([]byte, len(trafficState.UserUUID))
+	copy(w, trafficState.UserUUID)
 	return &VisionWriter{
 		Writer:            writer,
-		trafficState:      state,
-		ctx:               context,
+		trafficState:      trafficState,
+		ctx:               ctx,
 		writeOnceUserUUID: w,
 		isUplink:          isUplink,
+		conn:              conn,
+		ob:                ob,
 	}
 }
 
 func (w *VisionWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
-	if w.trafficState.NumberOfPacketToFilter > 0 {
-		XtlsFilterTls(mb, w.trafficState, w.ctx)
-	}
 	var isPadding *bool
 	var switchToDirectCopy *bool
 	if w.isUplink {
@@ -271,6 +322,29 @@ func (w *VisionWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 		isPadding = &w.trafficState.Inbound.IsPadding
 		switchToDirectCopy = &w.trafficState.Inbound.DownlinkWriterDirectCopy
 	}
+
+	if *switchToDirectCopy {
+		if inbound := session.InboundFromContext(w.ctx); inbound != nil {
+			if !w.isUplink && inbound.CanSpliceCopy == 2 {
+				inbound.CanSpliceCopy = 1
+			}
+			if w.isUplink && w.ob != nil && w.ob.CanSpliceCopy == 2 {
+				w.ob.CanSpliceCopy = 1
+			}
+		}
+		rawConn, _, writerCounter := UnwrapRawConn(w.conn)
+		w.Writer = buf.NewWriter(rawConn)
+		w.directWriteCounter = writerCounter
+		*switchToDirectCopy = false
+	}
+	if !mb.IsEmpty() && w.directWriteCounter != nil {
+		w.directWriteCounter.Add(int64(mb.Len()))
+	}
+
+	if w.trafficState.NumberOfPacketToFilter > 0 {
+		XtlsFilterTls(mb, w.trafficState, w.ctx)
+	}
+
 	if *isPadding {
 		if len(mb) == 1 && mb[0] == nil {
 			mb[0] = XtlsPadding(nil, CommandPaddingContinue, &w.writeOnceUserUUID, true, w.ctx) // we do a long padding to hide vless header
@@ -524,24 +598,33 @@ func XtlsFilterTls(buffer buf.MultiBuffer, trafficState *TrafficState, ctx conte
 	}
 }
 
-// UnwrapRawConn support unwrap stats, tls, utls, reality, proxyproto, uds-wrapper conn and get raw tcp/uds conn from it
+// UnwrapRawConn support unwrap encryption, stats, tls, utls, reality, proxyproto, uds-wrapper conn and get raw tcp/uds conn from it
 func UnwrapRawConn(conn net.Conn) (net.Conn, stats.Counter, stats.Counter) {
 	var readCounter, writerCounter stats.Counter
 	if conn != nil {
-		statConn, ok := conn.(*stat.CounterConnection)
-		if ok {
+		isEncryption := false
+		if commonConn, ok := conn.(*encryption.CommonConn); ok {
+			conn = commonConn.Conn
+			isEncryption = true
+		}
+		if xorConn, ok := conn.(*encryption.XorConn); ok {
+			return xorConn, nil, nil // full-random xorConn should not be penetrated
+		}
+		if statConn, ok := conn.(*stat.CounterConnection); ok {
 			conn = statConn.Connection
 			readCounter = statConn.ReadCounter
 			writerCounter = statConn.WriteCounter
 		}
-		if xc, ok := conn.(*tls.Conn); ok {
-			conn = xc.NetConn()
-		} else if utlsConn, ok := conn.(*tls.UConn); ok {
-			conn = utlsConn.NetConn()
-		} else if realityConn, ok := conn.(*reality.Conn); ok {
-			conn = realityConn.NetConn()
-		} else if realityUConn, ok := conn.(*reality.UConn); ok {
-			conn = realityUConn.NetConn()
+		if !isEncryption { // avoids double penetration
+			if xc, ok := conn.(*tls.Conn); ok {
+				conn = xc.NetConn()
+			} else if utlsConn, ok := conn.(*tls.UConn); ok {
+				conn = utlsConn.NetConn()
+			} else if realityConn, ok := conn.(*reality.Conn); ok {
+				conn = realityConn.NetConn()
+			} else if realityUConn, ok := conn.(*reality.UConn); ok {
+				conn = realityUConn.NetConn()
+			}
 		}
 		if pc, ok := conn.(*proxyproto.Conn); ok {
 			conn = pc.Raw()
@@ -626,15 +709,29 @@ func CopyRawConnIfExist(ctx context.Context, readerConn net.Conn, writerConn net
 			}
 		}
 		if err != nil {
+			if errors.Cause(err) == io.EOF {
+				return nil
+			}
 			return err
 		}
 	}
 }
 
 func readV(ctx context.Context, reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater, readCounter stats.Counter) error {
-	errors.LogInfo(ctx, "CopyRawConn readv")
+	errors.LogInfo(ctx, "CopyRawConn (maybe) readv")
 	if err := buf.Copy(reader, writer, buf.UpdateActivity(timer), buf.AddToStatCounter(readCounter)); err != nil {
 		return errors.New("failed to process response").Base(err)
 	}
 	return nil
 }
+
+func IsRAWTransportWithoutSecurity(conn stat.Connection) bool {
+	iConn := conn
+	if statConn, ok := iConn.(*stat.CounterConnection); ok {
+		iConn = statConn.Connection
+	}
+	_, ok1 := iConn.(*proxyproto.Conn)
+	_, ok2 := iConn.(*net.TCPConn)
+	_, ok3 := iConn.(*internet.UnixConnWrapper)
+	return ok1 || ok2 || ok3
+}

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

@@ -14,12 +14,12 @@ import (
 	"github.com/xtls/xray-core/common/protocol"
 	udp_proto "github.com/xtls/xray-core/common/protocol/udp"
 	"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/core"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/proxy"
 	"github.com/xtls/xray-core/proxy/http"
+	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/udp"
 )
@@ -75,6 +75,9 @@ func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Con
 	inbound.User = &protocol.MemoryUser{
 		Level: s.config.UserLevel,
 	}
+	if !proxy.IsRAWTransportWithoutSecurity(conn) {
+		inbound.CanSpliceCopy = 3
+	}
 
 	switch network {
 	case net.Network_TCP:
@@ -154,8 +157,16 @@ func (s *Server) processTCP(ctx context.Context, conn stat.Connection, dispatche
 				Reason: "",
 			})
 		}
-
-		return s.transport(ctx, reader, conn, dest, dispatcher, inbound)
+		if inbound.CanSpliceCopy == 2 {
+			inbound.CanSpliceCopy = 1
+		}
+		if err := dispatcher.DispatchLink(ctx, dest, &transport.Link{
+			Reader: reader,
+			Writer: buf.NewWriter(conn)},
+		); err != nil {
+			return errors.New("failed to dispatch request").Base(err)
+		}
+		return nil
 	}
 
 	if request.Command == protocol.RequestCommandUDP {
@@ -174,52 +185,6 @@ func (*Server) handleUDP(c io.Reader) error {
 	return common.Error2(io.Copy(buf.DiscardBytes, c))
 }
 
-func (s *Server) transport(ctx context.Context, reader io.Reader, writer io.Writer, dest net.Destination, dispatcher routing.Dispatcher, inbound *session.Inbound) error {
-	ctx, cancel := context.WithCancel(ctx)
-	timer := signal.CancelAfterInactivity(ctx, cancel, s.policy().Timeouts.ConnectionIdle)
-
-	if inbound != nil {
-		inbound.Timer = timer
-	}
-
-	plcy := s.policy()
-	ctx = policy.ContextWithBufferPolicy(ctx, plcy.Buffer)
-	link, err := dispatcher.Dispatch(ctx, dest)
-	if err != nil {
-		return err
-	}
-
-	requestDone := func() error {
-		defer timer.SetTimeout(plcy.Timeouts.DownlinkOnly)
-		if err := buf.Copy(buf.NewReader(reader), link.Writer, buf.UpdateActivity(timer)); err != nil {
-			return errors.New("failed to transport all TCP request").Base(err)
-		}
-
-		return nil
-	}
-
-	responseDone := func() error {
-		inbound.CanSpliceCopy = 1
-		defer timer.SetTimeout(plcy.Timeouts.UplinkOnly)
-
-		v2writer := buf.NewWriter(writer)
-		if err := buf.Copy(link.Reader, v2writer, buf.UpdateActivity(timer)); err != nil {
-			return errors.New("failed to transport all TCP response").Base(err)
-		}
-
-		return nil
-	}
-
-	requestDonePost := task.OnSuccess(requestDone, task.Close(link.Writer))
-	if err := task.Run(ctx, requestDonePost, responseDone); err != nil {
-		common.Interrupt(link.Reader)
-		common.Interrupt(link.Writer)
-		return errors.New("connection ends").Base(err)
-	}
-
-	return nil
-}
-
 func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	if s.udpFilter != nil && !s.udpFilter.Check(conn.RemoteAddr()) {
 		errors.LogDebug(ctx, "Unauthorized UDP access from ", conn.RemoteAddr().String())
@@ -231,6 +196,7 @@ func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dis
 
 		request := protocol.RequestHeaderFromContext(ctx)
 		if request == nil {
+			payload.Release()
 			return
 		}
 
@@ -249,9 +215,9 @@ 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()
 
@@ -259,7 +225,6 @@ func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dis
 	if inbound != nil && inbound.Source.IsValid() {
 		errors.LogInfo(ctx, "client UDP connection from ", inbound.Source)
 	}
-	inbound.CanSpliceCopy = 1
 
 	var dest *net.Destination
 

proxy/trojan/protocol.go

@@ -113,9 +113,11 @@ 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
 }

proxy/trojan/server.go

@@ -233,7 +233,7 @@ func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Con
 	sessionPolicy = s.policyManager.ForLevel(user.Level)
 
 	if destination.Network == net.Network_UDP { // handle udp request
-		return s.handleUDPPayload(ctx, &PacketReader{Reader: clientReader}, &PacketWriter{Writer: conn}, dispatcher)
+		return s.handleUDPPayload(ctx, sessionPolicy, &PacketReader{Reader: clientReader}, &PacketWriter{Writer: conn}, dispatcher)
 	}
 
 	ctx = log.ContextWithAccessMessage(ctx, &log.AccessMessage{
@@ -248,7 +248,11 @@ func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Con
 	return s.handleConnection(ctx, sessionPolicy, destination, clientReader, buf.NewWriter(conn), dispatcher)
 }
 
-func (s *Server) handleUDPPayload(ctx context.Context, clientReader *PacketReader, clientWriter *PacketWriter, dispatcher routing.Dispatcher) error {
+func (s *Server) handleUDPPayload(ctx context.Context, sessionPolicy policy.Session, clientReader *PacketReader, clientWriter *PacketWriter, dispatcher routing.Dispatcher) error {
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+	timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
+	defer timer.SetTimeout(0)
 	udpServer := udp.NewDispatcher(dispatcher, func(ctx context.Context, packet *udp_proto.Packet) {
 		udpPayload := packet.Payload
 		if udpPayload.UDP == nil {
@@ -257,6 +261,9 @@ func (s *Server) handleUDPPayload(ctx context.Context, clientReader *PacketReade
 
 		if err := clientWriter.WriteMultiBuffer(buf.MultiBuffer{udpPayload}); err != nil {
 			errors.LogWarningInner(ctx, err, "failed to write response")
+			cancel()
+		} else {
+			timer.Update()
 		}
 	})
 	defer udpServer.RemoveRay()
@@ -266,47 +273,56 @@ func (s *Server) handleUDPPayload(ctx context.Context, clientReader *PacketReade
 
 	var dest *net.Destination
 
-	for {
-		select {
-		case <-ctx.Done():
-			return nil
-		default:
-			mb, err := clientReader.ReadMultiBuffer()
-			if err != nil {
-				if errors.Cause(err) != io.EOF {
-					return errors.New("unexpected EOF").Base(err)
-				}
+	requestDone := func() error {
+		for {
+			select {
+			case <-ctx.Done():
 				return nil
-			}
+			default:
+				mb, err := clientReader.ReadMultiBuffer()
+				if err != nil {
+					if errors.Cause(err) != io.EOF {
+						return errors.New("unexpected EOF").Base(err)
+					}
+					return nil
+				}
 
-			mb2, b := buf.SplitFirst(mb)
-			if b == nil {
-				continue
-			}
-			destination := *b.UDP
+				mb2, b := buf.SplitFirst(mb)
+				if b == nil {
+					continue
+				}
+				timer.Update()
+				destination := *b.UDP
 
-			currentPacketCtx := ctx
-			if inbound.Source.IsValid() {
-				currentPacketCtx = log.ContextWithAccessMessage(ctx, &log.AccessMessage{
-					From:   inbound.Source,
-					To:     destination,
-					Status: log.AccessAccepted,
-					Reason: "",
-					Email:  user.Email,
-				})
-			}
-			errors.LogInfo(ctx, "tunnelling request to ", destination)
+				currentPacketCtx := ctx
+				if inbound.Source.IsValid() {
+					currentPacketCtx = log.ContextWithAccessMessage(ctx, &log.AccessMessage{
+						From:   inbound.Source,
+						To:     destination,
+						Status: log.AccessAccepted,
+						Reason: "",
+						Email:  user.Email,
+					})
+				}
+				errors.LogInfo(ctx, "tunnelling request to ", destination)
 
-			if !s.cone || dest == nil {
-				dest = &destination
-			}
+				if !s.cone || dest == nil {
+					dest = &destination
+				}
 
-			udpServer.Dispatch(currentPacketCtx, *dest, b) // first packet
-			for _, payload := range mb2 {
-				udpServer.Dispatch(currentPacketCtx, *dest, payload)
+				udpServer.Dispatch(currentPacketCtx, *dest, b) // first packet
+				for _, payload := range mb2 {
+					udpServer.Dispatch(currentPacketCtx, *dest, payload)
+				}
 			}
 		}
+
 	}
+
+	if err := task.Run(ctx, requestDone); err != nil {
+		return err
+	}
+	return nil
 }
 
 func (s *Server) handleConnection(ctx context.Context, sessionPolicy policy.Session,

proxy/vless/account.go

@@ -18,6 +18,9 @@ func (a *Account) AsAccount() (protocol.Account, error) {
 		ID:         protocol.NewID(id),
 		Flow:       a.Flow,       // needs parser here?
 		Encryption: a.Encryption, // needs parser here?
+		XorMode:    a.XorMode,
+		Seconds:    a.Seconds,
+		Padding:    a.Padding,
 	}, nil
 }
 
@@ -27,8 +30,11 @@ type MemoryAccount struct {
 	ID *protocol.ID
 	// Flow of the account. May be "xtls-rprx-vision".
 	Flow string
-	// Encryption of the account. Used for client connections, and only accepts "none" for now.
+
 	Encryption string
+	XorMode    uint32
+	Seconds    uint32
+	Padding    string
 }
 
 // Equals implements protocol.Account.Equals().
@@ -45,5 +51,8 @@ func (a *MemoryAccount) ToProto() proto.Message {
 		Id:         a.ID.String(),
 		Flow:       a.Flow,
 		Encryption: a.Encryption,
+		XorMode:    a.XorMode,
+		Seconds:    a.Seconds,
+		Padding:    a.Padding,
 	}
 }

proxy/vless/account.pb.go

@@ -28,9 +28,11 @@ type Account struct {
 	// ID of the account, in the form of a UUID, e.g., "66ad4540-b58c-4ad2-9926-ea63445a9b57".
 	Id string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
 	// Flow settings. May be "xtls-rprx-vision".
-	Flow string `protobuf:"bytes,2,opt,name=flow,proto3" json:"flow,omitempty"`
-	// Encryption settings. Only applies to client side, and only accepts "none" for now.
+	Flow       string `protobuf:"bytes,2,opt,name=flow,proto3" json:"flow,omitempty"`
 	Encryption string `protobuf:"bytes,3,opt,name=encryption,proto3" json:"encryption,omitempty"`
+	XorMode    uint32 `protobuf:"varint,4,opt,name=xorMode,proto3" json:"xorMode,omitempty"`
+	Seconds    uint32 `protobuf:"varint,5,opt,name=seconds,proto3" json:"seconds,omitempty"`
+	Padding    string `protobuf:"bytes,6,opt,name=padding,proto3" json:"padding,omitempty"`
 }
 
 func (x *Account) Reset() {
@@ -84,23 +86,49 @@ func (x *Account) GetEncryption() string {
 	return ""
 }
 
+func (x *Account) GetXorMode() uint32 {
+	if x != nil {
+		return x.XorMode
+	}
+	return 0
+}
+
+func (x *Account) GetSeconds() uint32 {
+	if x != nil {
+		return x.Seconds
+	}
+	return 0
+}
+
+func (x *Account) GetPadding() string {
+	if x != nil {
+		return x.Padding
+	}
+	return ""
+}
+
 var File_proxy_vless_account_proto protoreflect.FileDescriptor
 
 var file_proxy_vless_account_proto_rawDesc = []byte{
 	0x0a, 0x19, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f, 0x76, 0x6c, 0x65, 0x73, 0x73, 0x2f, 0x61, 0x63,
 	0x63, 0x6f, 0x75, 0x6e, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x10, 0x78, 0x72, 0x61,
-	0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x76, 0x6c, 0x65, 0x73, 0x73, 0x22, 0x4d, 0x0a,
-	0x07, 0x41, 0x63, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01,
-	0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12, 0x12, 0x0a, 0x04, 0x66, 0x6c, 0x6f, 0x77,
-	0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x66, 0x6c, 0x6f, 0x77, 0x12, 0x1e, 0x0a, 0x0a,
-	0x65, 0x6e, 0x63, 0x72, 0x79, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x18, 0x03, 0x20, 0x01, 0x28, 0x09,
-	0x52, 0x0a, 0x65, 0x6e, 0x63, 0x72, 0x79, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x42, 0x52, 0x0a, 0x14,
-	0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x76,
-	0x6c, 0x65, 0x73, 0x73, 0x50, 0x01, 0x5a, 0x25, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63,
-	0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72,
-	0x65, 0x2f, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f, 0x76, 0x6c, 0x65, 0x73, 0x73, 0xaa, 0x02, 0x10,
-	0x58, 0x72, 0x61, 0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x56, 0x6c, 0x65, 0x73, 0x73,
-	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x76, 0x6c, 0x65, 0x73, 0x73, 0x22, 0x9b, 0x01,
+	0x0a, 0x07, 0x41, 0x63, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18,
+	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12, 0x12, 0x0a, 0x04, 0x66, 0x6c, 0x6f,
+	0x77, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x66, 0x6c, 0x6f, 0x77, 0x12, 0x1e, 0x0a,
+	0x0a, 0x65, 0x6e, 0x63, 0x72, 0x79, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x18, 0x03, 0x20, 0x01, 0x28,
+	0x09, 0x52, 0x0a, 0x65, 0x6e, 0x63, 0x72, 0x79, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x12, 0x18, 0x0a,
+	0x07, 0x78, 0x6f, 0x72, 0x4d, 0x6f, 0x64, 0x65, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x07,
+	0x78, 0x6f, 0x72, 0x4d, 0x6f, 0x64, 0x65, 0x12, 0x18, 0x0a, 0x07, 0x73, 0x65, 0x63, 0x6f, 0x6e,
+	0x64, 0x73, 0x18, 0x05, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x07, 0x73, 0x65, 0x63, 0x6f, 0x6e, 0x64,
+	0x73, 0x12, 0x18, 0x0a, 0x07, 0x70, 0x61, 0x64, 0x64, 0x69, 0x6e, 0x67, 0x18, 0x06, 0x20, 0x01,
+	0x28, 0x09, 0x52, 0x07, 0x70, 0x61, 0x64, 0x64, 0x69, 0x6e, 0x67, 0x42, 0x52, 0x0a, 0x14, 0x63,
+	0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x76, 0x6c,
+	0x65, 0x73, 0x73, 0x50, 0x01, 0x5a, 0x25, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f,
+	0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65,
+	0x2f, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f, 0x76, 0x6c, 0x65, 0x73, 0x73, 0xaa, 0x02, 0x10, 0x58,
+	0x72, 0x61, 0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x56, 0x6c, 0x65, 0x73, 0x73, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

proxy/vless/account.proto

@@ -11,6 +11,9 @@ message Account {
   string id = 1;
   // Flow settings. May be "xtls-rprx-vision".
   string flow = 2;
-  // Encryption settings. Only applies to client side, and only accepts "none" for now.
+
   string encryption = 3;
+  uint32 xorMode = 4;
+  uint32 seconds = 5;
+  string padding = 6;
 }

proxy/vless/encoding/addons.go

@@ -3,10 +3,12 @@ package encoding
 import (
 	"context"
 	"io"
+	"net"
 
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/protocol"
+	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/proxy"
 	"github.com/xtls/xray-core/proxy/vless"
 	"google.golang.org/protobuf/proto"
@@ -61,15 +63,14 @@ func DecodeHeaderAddons(buffer *buf.Buffer, reader io.Reader) (*Addons, error) {
 }
 
 // EncodeBodyAddons returns a Writer that auto-encrypt content written by caller.
-func EncodeBodyAddons(writer io.Writer, request *protocol.RequestHeader, requestAddons *Addons, state *proxy.TrafficState, isUplink bool, context context.Context) buf.Writer {
+func EncodeBodyAddons(writer buf.Writer, request *protocol.RequestHeader, requestAddons *Addons, state *proxy.TrafficState, isUplink bool, context context.Context, conn net.Conn, ob *session.Outbound) buf.Writer {
 	if request.Command == protocol.RequestCommandUDP {
-		return NewMultiLengthPacketWriter(writer.(buf.Writer))
+		return NewMultiLengthPacketWriter(writer)
 	}
-	w := buf.NewWriter(writer)
 	if requestAddons.Flow == vless.XRV {
-		w = proxy.NewVisionWriter(w, state, isUplink, context)
+		return proxy.NewVisionWriter(writer, state, isUplink, context, conn, ob)
 	}
-	return w
+	return writer
 }
 
 // DecodeBodyAddons returns a Reader from which caller can fetch decrypted body.

proxy/vless/encoding/encoding.go

@@ -1,7 +1,6 @@
 package encoding
 
 import (
-	"bytes"
 	"context"
 	"io"
 
@@ -11,7 +10,6 @@ import (
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/common/signal"
-	"github.com/xtls/xray-core/features/stats"
 	"github.com/xtls/xray-core/proxy"
 	"github.com/xtls/xray-core/proxy/vless"
 )
@@ -171,8 +169,8 @@ func DecodeResponseHeader(reader io.Reader, request *protocol.RequestHeader) (*A
 	return responseAddons, nil
 }
 
-// XtlsRead filter and read xtls protocol
-func XtlsRead(reader buf.Reader, writer buf.Writer, timer *signal.ActivityTimer, conn net.Conn, input *bytes.Reader, rawInput *bytes.Buffer, trafficState *proxy.TrafficState, ob *session.Outbound, isUplink bool, ctx context.Context) error {
+// XtlsRead can switch to splice copy
+func XtlsRead(reader buf.Reader, writer buf.Writer, timer *signal.ActivityTimer, conn net.Conn, trafficState *proxy.TrafficState, isUplink bool, ctx context.Context) error {
 	err := func() error {
 		for {
 			if isUplink && trafficState.Inbound.UplinkReaderDirectCopy || !isUplink && trafficState.Outbound.DownlinkReaderDirectCopy {
@@ -181,74 +179,11 @@ func XtlsRead(reader buf.Reader, writer buf.Writer, timer *signal.ActivityTimer,
 				if inbound := session.InboundFromContext(ctx); inbound != nil && inbound.Conn != nil {
 					writerConn = inbound.Conn
 					inTimer = inbound.Timer
-					if isUplink && inbound.CanSpliceCopy == 2 {
-						inbound.CanSpliceCopy = 1
-					}
-					if !isUplink && ob != nil && ob.CanSpliceCopy == 2 { // ob need to be passed in due to context can change
-						ob.CanSpliceCopy = 1
-					}
 				}
 				return proxy.CopyRawConnIfExist(ctx, conn, writerConn, writer, timer, inTimer)
 			}
 			buffer, err := reader.ReadMultiBuffer()
 			if !buffer.IsEmpty() {
-				timer.Update()
-				if isUplink && trafficState.Inbound.UplinkReaderDirectCopy || !isUplink && trafficState.Outbound.DownlinkReaderDirectCopy {
-					// XTLS Vision processes struct TLS Conn's input and rawInput
-					if inputBuffer, err := buf.ReadFrom(input); err == nil {
-						if !inputBuffer.IsEmpty() {
-							buffer, _ = buf.MergeMulti(buffer, inputBuffer)
-						}
-					}
-					if rawInputBuffer, err := buf.ReadFrom(rawInput); err == nil {
-						if !rawInputBuffer.IsEmpty() {
-							buffer, _ = buf.MergeMulti(buffer, rawInputBuffer)
-						}
-					}
-				}
-				if werr := writer.WriteMultiBuffer(buffer); werr != nil {
-					return werr
-				}
-			}
-			if err != nil {
-				return err
-			}
-		}
-	}()
-	if err != nil && errors.Cause(err) != io.EOF {
-		return err
-	}
-	return nil
-}
-
-// XtlsWrite filter and write xtls protocol
-func XtlsWrite(reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater, conn net.Conn, trafficState *proxy.TrafficState, ob *session.Outbound, isUplink bool, ctx context.Context) error {
-	err := func() error {
-		var ct stats.Counter
-		for {
-			buffer, err := reader.ReadMultiBuffer()
-			if isUplink && trafficState.Outbound.UplinkWriterDirectCopy || !isUplink && trafficState.Inbound.DownlinkWriterDirectCopy {
-				if inbound := session.InboundFromContext(ctx); inbound != nil {
-					if !isUplink && inbound.CanSpliceCopy == 2 {
-						inbound.CanSpliceCopy = 1
-					}
-					if isUplink && ob != nil && ob.CanSpliceCopy == 2 {
-						ob.CanSpliceCopy = 1
-					}
-				}
-				rawConn, _, writerCounter := proxy.UnwrapRawConn(conn)
-				writer = buf.NewWriter(rawConn)
-				ct = writerCounter
-				if isUplink {
-					trafficState.Outbound.UplinkWriterDirectCopy = false
-				} else {
-					trafficState.Inbound.DownlinkWriterDirectCopy = false
-				}
-			}
-			if !buffer.IsEmpty() {
-				if ct != nil {
-					ct.Add(int64(buffer.Len()))
-				}
 				timer.Update()
 				if werr := writer.WriteMultiBuffer(buffer); werr != nil {
 					return werr

proxy/vless/encryption/client.go

@@ -0,0 +1,210 @@
+package encryption
+
+import (
+	"crypto/cipher"
+	"crypto/ecdh"
+	"crypto/mlkem"
+	"crypto/rand"
+	"io"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/common/protocol"
+	"lukechampine.com/blake3"
+)
+
+type ClientInstance struct {
+	NfsPKeys      []any
+	NfsPKeysBytes [][]byte
+	Hash32s       [][32]byte
+	RelaysLength  int
+	XorMode       uint32
+	Seconds       uint32
+	PaddingLens   [][3]int
+	PaddingGaps   [][3]int
+
+	RWLock sync.RWMutex
+	Expire time.Time
+	PfsKey []byte
+	Ticket []byte
+}
+
+func (i *ClientInstance) Init(nfsPKeysBytes [][]byte, xorMode, seconds uint32, padding string) (err error) {
+	if i.NfsPKeys != nil {
+		return errors.New("already initialized")
+	}
+	l := len(nfsPKeysBytes)
+	if l == 0 {
+		return errors.New("empty nfsPKeysBytes")
+	}
+	i.NfsPKeys = make([]any, l)
+	i.NfsPKeysBytes = nfsPKeysBytes
+	i.Hash32s = make([][32]byte, l)
+	for j, k := range nfsPKeysBytes {
+		if len(k) == 32 {
+			if i.NfsPKeys[j], err = ecdh.X25519().NewPublicKey(k); err != nil {
+				return
+			}
+			i.RelaysLength += 32 + 32
+		} else {
+			if i.NfsPKeys[j], err = mlkem.NewEncapsulationKey768(k); err != nil {
+				return
+			}
+			i.RelaysLength += 1088 + 32
+		}
+		i.Hash32s[j] = blake3.Sum256(k)
+	}
+	i.RelaysLength -= 32
+	i.XorMode = xorMode
+	i.Seconds = seconds
+	return ParsePadding(padding, &i.PaddingLens, &i.PaddingGaps)
+}
+
+func (i *ClientInstance) Handshake(conn net.Conn) (*CommonConn, error) {
+	if i.NfsPKeys == nil {
+		return nil, errors.New("uninitialized")
+	}
+	c := NewCommonConn(conn, protocol.HasAESGCMHardwareSupport)
+
+	ivAndRealysLength := 16 + i.RelaysLength
+	pfsKeyExchangeLength := 18 + 1184 + 32 + 16
+	paddingLength, paddingLens, paddingGaps := CreatPadding(i.PaddingLens, i.PaddingGaps)
+	clientHello := make([]byte, ivAndRealysLength+pfsKeyExchangeLength+paddingLength)
+
+	iv := clientHello[:16]
+	rand.Read(iv)
+	relays := clientHello[16:ivAndRealysLength]
+	var nfsKey []byte
+	var lastCTR cipher.Stream
+	for j, k := range i.NfsPKeys {
+		var index = 32
+		if k, ok := k.(*ecdh.PublicKey); ok {
+			privateKey, _ := ecdh.X25519().GenerateKey(rand.Reader)
+			copy(relays, privateKey.PublicKey().Bytes())
+			var err error
+			nfsKey, err = privateKey.ECDH(k)
+			if err != nil {
+				return nil, err
+			}
+		}
+		if k, ok := k.(*mlkem.EncapsulationKey768); ok {
+			var ciphertext []byte
+			nfsKey, ciphertext = k.Encapsulate()
+			copy(relays, ciphertext)
+			index = 1088
+		}
+		if i.XorMode > 0 { // this xor can (others can't) be recovered by client's config, revealing an X25519 public key / ML-KEM-768 ciphertext, that's why "native" values
+			NewCTR(i.NfsPKeysBytes[j], iv).XORKeyStream(relays, relays[:index]) // make X25519 public key / ML-KEM-768 ciphertext distinguishable from random bytes
+		}
+		if lastCTR != nil {
+			lastCTR.XORKeyStream(relays, relays[:32]) // make this relay irreplaceable
+		}
+		if j == len(i.NfsPKeys)-1 {
+			break
+		}
+		lastCTR = NewCTR(nfsKey, iv)
+		lastCTR.XORKeyStream(relays[index:], i.Hash32s[j+1][:])
+		relays = relays[index+32:]
+	}
+	nfsAEAD := NewAEAD(iv, nfsKey, c.UseAES)
+
+	if i.Seconds > 0 {
+		i.RWLock.RLock()
+		if time.Now().Before(i.Expire) {
+			c.Client = i
+			c.UnitedKey = append(i.PfsKey, nfsKey...) // different unitedKey for each connection
+			nfsAEAD.Seal(clientHello[:ivAndRealysLength], nil, EncodeLength(32), nil)
+			nfsAEAD.Seal(clientHello[:ivAndRealysLength+18], nil, i.Ticket, nil)
+			i.RWLock.RUnlock()
+			c.PreWrite = clientHello[:ivAndRealysLength+18+32]
+			c.AEAD = NewAEAD(clientHello[ivAndRealysLength+18:ivAndRealysLength+18+32], c.UnitedKey, c.UseAES)
+			if i.XorMode == 2 {
+				c.Conn = NewXorConn(conn, NewCTR(c.UnitedKey, iv), nil, len(c.PreWrite), 16)
+			}
+			return c, nil
+		}
+		i.RWLock.RUnlock()
+	}
+
+	pfsKeyExchange := clientHello[ivAndRealysLength : ivAndRealysLength+pfsKeyExchangeLength]
+	nfsAEAD.Seal(pfsKeyExchange[:0], nil, EncodeLength(pfsKeyExchangeLength-18), nil)
+	mlkem768DKey, _ := mlkem.GenerateKey768()
+	x25519SKey, _ := ecdh.X25519().GenerateKey(rand.Reader)
+	pfsPublicKey := append(mlkem768DKey.EncapsulationKey().Bytes(), x25519SKey.PublicKey().Bytes()...)
+	nfsAEAD.Seal(pfsKeyExchange[:18], nil, pfsPublicKey, nil)
+
+	padding := clientHello[ivAndRealysLength+pfsKeyExchangeLength:]
+	nfsAEAD.Seal(padding[:0], nil, EncodeLength(paddingLength-18), nil)
+	nfsAEAD.Seal(padding[:18], nil, padding[18:paddingLength-16], nil)
+
+	paddingLens[0] = ivAndRealysLength + pfsKeyExchangeLength + paddingLens[0]
+	for i, l := range paddingLens { // sends padding in a fragmented way, to create variable traffic pattern, before inner VLESS flow takes control
+		if l > 0 {
+			if _, err := conn.Write(clientHello[:l]); err != nil {
+				return nil, err
+			}
+			clientHello = clientHello[l:]
+		}
+		if len(paddingGaps) > i {
+			time.Sleep(paddingGaps[i])
+		}
+	}
+
+	encryptedPfsPublicKey := make([]byte, 1088+32+16)
+	if _, err := io.ReadFull(conn, encryptedPfsPublicKey); err != nil {
+		return nil, err
+	}
+	nfsAEAD.Open(encryptedPfsPublicKey[:0], MaxNonce, encryptedPfsPublicKey, nil)
+	mlkem768Key, err := mlkem768DKey.Decapsulate(encryptedPfsPublicKey[:1088])
+	if err != nil {
+		return nil, err
+	}
+	peerX25519PKey, err := ecdh.X25519().NewPublicKey(encryptedPfsPublicKey[1088 : 1088+32])
+	if err != nil {
+		return nil, err
+	}
+	x25519Key, err := x25519SKey.ECDH(peerX25519PKey)
+	if err != nil {
+		return nil, err
+	}
+	pfsKey := make([]byte, 32+32) // no more capacity
+	copy(pfsKey, mlkem768Key)
+	copy(pfsKey[32:], x25519Key)
+	c.UnitedKey = append(pfsKey, nfsKey...)
+	c.AEAD = NewAEAD(pfsPublicKey, c.UnitedKey, c.UseAES)
+	c.PeerAEAD = NewAEAD(encryptedPfsPublicKey[:1088+32], c.UnitedKey, c.UseAES)
+
+	encryptedTicket := make([]byte, 32)
+	if _, err := io.ReadFull(conn, encryptedTicket); err != nil {
+		return nil, err
+	}
+	if _, err := c.PeerAEAD.Open(encryptedTicket[:0], nil, encryptedTicket, nil); err != nil {
+		return nil, err
+	}
+	seconds := DecodeLength(encryptedTicket)
+
+	if i.Seconds > 0 && seconds > 0 {
+		i.RWLock.Lock()
+		i.Expire = time.Now().Add(time.Duration(seconds) * time.Second)
+		i.PfsKey = pfsKey
+		i.Ticket = encryptedTicket[:16]
+		i.RWLock.Unlock()
+	}
+
+	encryptedLength := make([]byte, 18)
+	if _, err := io.ReadFull(conn, encryptedLength); err != nil {
+		return nil, err
+	}
+	if _, err := c.PeerAEAD.Open(encryptedLength[:0], nil, encryptedLength, nil); err != nil {
+		return nil, err
+	}
+	length := DecodeLength(encryptedLength[:2])
+	c.PeerPadding = make([]byte, length) // important: allows server sends padding slowly, eliminating 1-RTT's traffic pattern
+
+	if i.XorMode == 2 {
+		c.Conn = NewXorConn(conn, NewCTR(c.UnitedKey, iv), NewCTR(c.UnitedKey, encryptedTicket[:16]), 0, length)
+	}
+	return c, nil
+}

proxy/vless/encryption/common.go

@@ -0,0 +1,280 @@
+package encryption
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"fmt"
+	"io"
+	"net"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/xtls/xray-core/common/crypto"
+	"github.com/xtls/xray-core/common/errors"
+	"golang.org/x/crypto/chacha20poly1305"
+	"lukechampine.com/blake3"
+)
+
+var OutBytesPool = sync.Pool{
+	New: func() any {
+		return make([]byte, 5+8192+16)
+	},
+}
+
+type CommonConn struct {
+	net.Conn
+	UseAES      bool
+	Client      *ClientInstance
+	UnitedKey   []byte
+	PreWrite    []byte
+	AEAD        *AEAD
+	PeerAEAD    *AEAD
+	PeerPadding []byte
+	rawInput    bytes.Buffer
+	input       bytes.Reader
+}
+
+func NewCommonConn(conn net.Conn, useAES bool) *CommonConn {
+	return &CommonConn{
+		Conn:   conn,
+		UseAES: useAES,
+	}
+}
+
+func (c *CommonConn) Write(b []byte) (int, error) {
+	if len(b) == 0 {
+		return 0, nil
+	}
+	outBytes := OutBytesPool.Get().([]byte)
+	defer OutBytesPool.Put(outBytes)
+	for n := 0; n < len(b); {
+		b := b[n:]
+		if len(b) > 8192 {
+			b = b[:8192] // for avoiding another copy() in peer's Read()
+		}
+		n += len(b)
+		headerAndData := outBytes[:5+len(b)+16]
+		EncodeHeader(headerAndData, len(b)+16)
+		max := false
+		if bytes.Equal(c.AEAD.Nonce[:], MaxNonce) {
+			max = true
+		}
+		c.AEAD.Seal(headerAndData[:5], nil, b, headerAndData[:5])
+		if max {
+			c.AEAD = NewAEAD(headerAndData, c.UnitedKey, c.UseAES)
+		}
+		if c.PreWrite != nil {
+			headerAndData = append(c.PreWrite, headerAndData...)
+			c.PreWrite = nil
+		}
+		if _, err := c.Conn.Write(headerAndData); err != nil {
+			return 0, err
+		}
+	}
+	return len(b), nil
+}
+
+func (c *CommonConn) Read(b []byte) (int, error) {
+	if len(b) == 0 {
+		return 0, nil
+	}
+	if c.PeerAEAD == nil { // client's 0-RTT
+		serverRandom := make([]byte, 16)
+		if _, err := io.ReadFull(c.Conn, serverRandom); err != nil {
+			return 0, err
+		}
+		c.PeerAEAD = NewAEAD(serverRandom, c.UnitedKey, c.UseAES)
+		if xorConn, ok := c.Conn.(*XorConn); ok {
+			xorConn.PeerCTR = NewCTR(c.UnitedKey, serverRandom)
+		}
+	}
+	if c.PeerPadding != nil { // client's 1-RTT
+		if _, err := io.ReadFull(c.Conn, c.PeerPadding); err != nil {
+			return 0, err
+		}
+		if _, err := c.PeerAEAD.Open(c.PeerPadding[:0], nil, c.PeerPadding, nil); err != nil {
+			return 0, err
+		}
+		c.PeerPadding = nil
+	}
+	if c.input.Len() > 0 {
+		return c.input.Read(b)
+	}
+	peerHeader := [5]byte{}
+	if _, err := io.ReadFull(c.Conn, peerHeader[:]); err != nil {
+		return 0, err
+	}
+	l, err := DecodeHeader(peerHeader[:]) // l: 17~17000
+	if err != nil {
+		if c.Client != nil && strings.Contains(err.Error(), "invalid header: ") { // client's 0-RTT
+			c.Client.RWLock.Lock()
+			if bytes.HasPrefix(c.UnitedKey, c.Client.PfsKey) {
+				c.Client.Expire = time.Now() // expired
+			}
+			c.Client.RWLock.Unlock()
+			return 0, errors.New("new handshake needed")
+		}
+		return 0, err
+	}
+	c.Client = nil
+	if c.rawInput.Cap() < l {
+		c.rawInput.Grow(l) // no need to use sync.Pool, because we are always reading
+	}
+	peerData := c.rawInput.Bytes()[:l]
+	if _, err := io.ReadFull(c.Conn, peerData); err != nil {
+		return 0, err
+	}
+	dst := peerData[:l-16]
+	if len(dst) <= len(b) {
+		dst = b[:len(dst)] // avoids another copy()
+	}
+	var newAEAD *AEAD
+	if bytes.Equal(c.PeerAEAD.Nonce[:], MaxNonce) {
+		newAEAD = NewAEAD(append(peerHeader[:], peerData...), c.UnitedKey, c.UseAES)
+	}
+	_, err = c.PeerAEAD.Open(dst[:0], nil, peerData, peerHeader[:])
+	if newAEAD != nil {
+		c.PeerAEAD = newAEAD
+	}
+	if err != nil {
+		return 0, err
+	}
+	if len(dst) > len(b) {
+		c.input.Reset(dst[copy(b, dst):])
+		dst = b // for len(dst)
+	}
+	return len(dst), nil
+}
+
+type AEAD struct {
+	cipher.AEAD
+	Nonce [12]byte
+}
+
+func NewAEAD(ctx, key []byte, useAES bool) *AEAD {
+	k := make([]byte, 32)
+	blake3.DeriveKey(k, string(ctx), key)
+	var aead cipher.AEAD
+	if useAES {
+		block, _ := aes.NewCipher(k)
+		aead, _ = cipher.NewGCM(block)
+	} else {
+		aead, _ = chacha20poly1305.New(k)
+	}
+	return &AEAD{AEAD: aead}
+}
+
+func (a *AEAD) Seal(dst, nonce, plaintext, additionalData []byte) []byte {
+	if nonce == nil {
+		nonce = IncreaseNonce(a.Nonce[:])
+	}
+	return a.AEAD.Seal(dst, nonce, plaintext, additionalData)
+}
+
+func (a *AEAD) Open(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) {
+	if nonce == nil {
+		nonce = IncreaseNonce(a.Nonce[:])
+	}
+	return a.AEAD.Open(dst, nonce, ciphertext, additionalData)
+}
+
+func IncreaseNonce(nonce []byte) []byte {
+	for i := range 12 {
+		nonce[11-i]++
+		if nonce[11-i] != 0 {
+			break
+		}
+	}
+	return nonce
+}
+
+var MaxNonce = bytes.Repeat([]byte{255}, 12)
+
+func EncodeLength(l int) []byte {
+	return []byte{byte(l >> 8), byte(l)}
+}
+
+func DecodeLength(b []byte) int {
+	return int(b[0])<<8 | int(b[1])
+}
+
+func EncodeHeader(h []byte, l int) {
+	h[0] = 23
+	h[1] = 3
+	h[2] = 3
+	h[3] = byte(l >> 8)
+	h[4] = byte(l)
+}
+
+func DecodeHeader(h []byte) (l int, err error) {
+	l = int(h[3])<<8 | int(h[4])
+	if h[0] != 23 || h[1] != 3 || h[2] != 3 {
+		l = 0
+	}
+	if l < 17 || l > 17000 { // TODO: TLSv1.3 max length
+		err = errors.New("invalid header: " + fmt.Sprintf("%v", h[:5])) // DO NOT CHANGE: relied by client's Read()
+	}
+	return
+}
+
+func ParsePadding(padding string, paddingLens, paddingGaps *[][3]int) (err error) {
+	if padding == "" {
+		return
+	}
+	maxLen := 0
+	for i, s := range strings.Split(padding, ".") {
+		x := strings.Split(s, "-")
+		if len(x) < 3 || x[0] == "" || x[1] == "" || x[2] == "" {
+			return errors.New("invalid padding lenth/gap parameter: " + s)
+		}
+		y := [3]int{}
+		if y[0], err = strconv.Atoi(x[0]); err != nil {
+			return
+		}
+		if y[1], err = strconv.Atoi(x[1]); err != nil {
+			return
+		}
+		if y[2], err = strconv.Atoi(x[2]); err != nil {
+			return
+		}
+		if i == 0 && (y[0] < 100 || y[1] < 18+17 || y[2] < 18+17) {
+			return errors.New("first padding length must not be smaller than 35")
+		}
+		if i%2 == 0 {
+			*paddingLens = append(*paddingLens, y)
+			maxLen += max(y[1], y[2])
+		} else {
+			*paddingGaps = append(*paddingGaps, y)
+		}
+	}
+	if maxLen > 18+65535 {
+		return errors.New("total padding length must not be larger than 65553")
+	}
+	return
+}
+
+func CreatPadding(paddingLens, paddingGaps [][3]int) (length int, lens []int, gaps []time.Duration) {
+	if len(paddingLens) == 0 {
+		paddingLens = [][3]int{{100, 111, 1111}, {50, 0, 3333}}
+		paddingGaps = [][3]int{{75, 0, 111}}
+	}
+	for _, y := range paddingLens {
+		l := 0
+		if y[0] >= int(crypto.RandBetween(0, 100)) {
+			l = int(crypto.RandBetween(int64(y[1]), int64(y[2])))
+		}
+		lens = append(lens, l)
+		length += l
+	}
+	for _, y := range paddingGaps {
+		g := 0
+		if y[0] >= int(crypto.RandBetween(0, 100)) {
+			g = int(crypto.RandBetween(int64(y[1]), int64(y[2])))
+		}
+		gaps = append(gaps, time.Duration(g)*time.Millisecond)
+	}
+	return
+}

proxy/vless/encryption/server.go

@@ -0,0 +1,328 @@
+package encryption
+
+import (
+	"bytes"
+	"crypto/cipher"
+	"crypto/ecdh"
+	"crypto/mlkem"
+	"crypto/rand"
+	"fmt"
+	"io"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/xtls/xray-core/common/crypto"
+	"github.com/xtls/xray-core/common/errors"
+	"lukechampine.com/blake3"
+)
+
+type ServerSession struct {
+	PfsKey  []byte
+	NfsKeys sync.Map
+}
+
+type ServerInstance struct {
+	NfsSKeys      []any
+	NfsPKeysBytes [][]byte
+	Hash32s       [][32]byte
+	RelaysLength  int
+	XorMode       uint32
+	SecondsFrom   int64
+	SecondsTo     int64
+	PaddingLens   [][3]int
+	PaddingGaps   [][3]int
+
+	RWLock   sync.RWMutex
+	Closed   bool
+	Lasts    map[int64][16]byte
+	Tickets  [][16]byte
+	Sessions map[[16]byte]*ServerSession
+}
+
+func (i *ServerInstance) Init(nfsSKeysBytes [][]byte, xorMode uint32, secondsFrom, secondsTo int64, padding string) (err error) {
+	if i.NfsSKeys != nil {
+		return errors.New("already initialized")
+	}
+	l := len(nfsSKeysBytes)
+	if l == 0 {
+		return errors.New("empty nfsSKeysBytes")
+	}
+	i.NfsSKeys = make([]any, l)
+	i.NfsPKeysBytes = make([][]byte, l)
+	i.Hash32s = make([][32]byte, l)
+	for j, k := range nfsSKeysBytes {
+		if len(k) == 32 {
+			if i.NfsSKeys[j], err = ecdh.X25519().NewPrivateKey(k); err != nil {
+				return
+			}
+			i.NfsPKeysBytes[j] = i.NfsSKeys[j].(*ecdh.PrivateKey).PublicKey().Bytes()
+			i.RelaysLength += 32 + 32
+		} else {
+			if i.NfsSKeys[j], err = mlkem.NewDecapsulationKey768(k); err != nil {
+				return
+			}
+			i.NfsPKeysBytes[j] = i.NfsSKeys[j].(*mlkem.DecapsulationKey768).EncapsulationKey().Bytes()
+			i.RelaysLength += 1088 + 32
+		}
+		i.Hash32s[j] = blake3.Sum256(i.NfsPKeysBytes[j])
+	}
+	i.RelaysLength -= 32
+	i.XorMode = xorMode
+	i.SecondsFrom = secondsFrom
+	i.SecondsTo = secondsTo
+	err = ParsePadding(padding, &i.PaddingLens, &i.PaddingGaps)
+	if err != nil {
+		return
+	}
+	if i.SecondsFrom > 0 || i.SecondsTo > 0 {
+		i.Lasts = make(map[int64][16]byte)
+		i.Tickets = make([][16]byte, 0, 1024)
+		i.Sessions = make(map[[16]byte]*ServerSession)
+		go func() {
+			for {
+				time.Sleep(time.Minute)
+				i.RWLock.Lock()
+				if i.Closed {
+					i.RWLock.Unlock()
+					return
+				}
+				minute := time.Now().Unix() / 60
+				last := i.Lasts[minute]
+				delete(i.Lasts, minute)
+				delete(i.Lasts, minute-1) // for insurance
+				if last != [16]byte{} {
+					for j, ticket := range i.Tickets {
+						delete(i.Sessions, ticket)
+						if ticket == last {
+							i.Tickets = i.Tickets[j+1:]
+							break
+						}
+					}
+				}
+				i.RWLock.Unlock()
+			}
+		}()
+	}
+	return
+}
+
+func (i *ServerInstance) Close() (err error) {
+	i.RWLock.Lock()
+	i.Closed = true
+	i.RWLock.Unlock()
+	return
+}
+
+func (i *ServerInstance) Handshake(conn net.Conn, fallback *[]byte) (*CommonConn, error) {
+	if i.NfsSKeys == nil {
+		return nil, errors.New("uninitialized")
+	}
+	c := NewCommonConn(conn, true)
+
+	ivAndRelays := make([]byte, 16+i.RelaysLength)
+	if _, err := io.ReadFull(conn, ivAndRelays); err != nil {
+		return nil, err
+	}
+	if fallback != nil {
+		*fallback = append(*fallback, ivAndRelays...)
+	}
+	iv := ivAndRelays[:16]
+	relays := ivAndRelays[16:]
+	var nfsKey []byte
+	var lastCTR cipher.Stream
+	for j, k := range i.NfsSKeys {
+		if lastCTR != nil {
+			lastCTR.XORKeyStream(relays, relays[:32]) // recover this relay
+		}
+		var index = 32
+		if _, ok := k.(*mlkem.DecapsulationKey768); ok {
+			index = 1088
+		}
+		if i.XorMode > 0 {
+			NewCTR(i.NfsPKeysBytes[j], iv).XORKeyStream(relays, relays[:index]) // we don't use buggy elligator2, because we have PSK :)
+		}
+		if k, ok := k.(*ecdh.PrivateKey); ok {
+			publicKey, err := ecdh.X25519().NewPublicKey(relays[:index])
+			if err != nil {
+				return nil, err
+			}
+			if publicKey.Bytes()[31] > 127 { // we just don't want the observer can change even one bit without breaking the connection, though it has nothing to do with security
+				return nil, errors.New("the highest bit of the last byte of the peer-sent X25519 public key is not 0")
+			}
+			nfsKey, err = k.ECDH(publicKey)
+			if err != nil {
+				return nil, err
+			}
+		}
+		if k, ok := k.(*mlkem.DecapsulationKey768); ok {
+			var err error
+			nfsKey, err = k.Decapsulate(relays[:index])
+			if err != nil {
+				return nil, err
+			}
+		}
+		if j == len(i.NfsSKeys)-1 {
+			break
+		}
+		relays = relays[index:]
+		lastCTR = NewCTR(nfsKey, iv)
+		lastCTR.XORKeyStream(relays, relays[:32])
+		if !bytes.Equal(relays[:32], i.Hash32s[j+1][:]) {
+			return nil, errors.New("unexpected hash32: ", fmt.Sprintf("%v", relays[:32]))
+		}
+		relays = relays[32:]
+	}
+	nfsAEAD := NewAEAD(iv, nfsKey, c.UseAES)
+
+	encryptedLength := make([]byte, 18)
+	if _, err := io.ReadFull(conn, encryptedLength); err != nil {
+		return nil, err
+	}
+	if fallback != nil {
+		*fallback = append(*fallback, encryptedLength...)
+	}
+	decryptedLength := make([]byte, 2)
+	if _, err := nfsAEAD.Open(decryptedLength[:0], nil, encryptedLength, nil); err != nil {
+		c.UseAES = !c.UseAES
+		nfsAEAD = NewAEAD(iv, nfsKey, c.UseAES)
+		if _, err := nfsAEAD.Open(decryptedLength[:0], nil, encryptedLength, nil); err != nil {
+			return nil, err
+		}
+	}
+	if fallback != nil {
+		*fallback = nil
+	}
+	length := DecodeLength(decryptedLength)
+
+	if length == 32 {
+		if i.SecondsFrom == 0 && i.SecondsTo == 0 {
+			return nil, errors.New("0-RTT is not allowed")
+		}
+		encryptedTicket := make([]byte, 32)
+		if _, err := io.ReadFull(conn, encryptedTicket); err != nil {
+			return nil, err
+		}
+		ticket, err := nfsAEAD.Open(nil, nil, encryptedTicket, nil)
+		if err != nil {
+			return nil, err
+		}
+		i.RWLock.RLock()
+		s := i.Sessions[[16]byte(ticket)]
+		i.RWLock.RUnlock()
+		if s == nil {
+			noises := make([]byte, crypto.RandBetween(1279, 2279)) // matches 1-RTT's server hello length for "random", though it is not important, just for example
+			var err error
+			for err == nil {
+				rand.Read(noises)
+				_, err = DecodeHeader(noises)
+			}
+			conn.Write(noises) // make client do new handshake
+			return nil, errors.New("expired ticket")
+		}
+		if _, loaded := s.NfsKeys.LoadOrStore([32]byte(nfsKey), true); loaded { // prevents bad client also
+			return nil, errors.New("replay detected")
+		}
+		c.UnitedKey = append(s.PfsKey, nfsKey...) // the same nfsKey links the upload & download (prevents server -> client's another request)
+		c.PreWrite = make([]byte, 16)
+		rand.Read(c.PreWrite) // always trust yourself, not the client (also prevents being parsed as TLS thus causing false interruption for "native" and "xorpub")
+		c.AEAD = NewAEAD(c.PreWrite, c.UnitedKey, c.UseAES)
+		c.PeerAEAD = NewAEAD(encryptedTicket, c.UnitedKey, c.UseAES) // unchangeable ctx (prevents server -> server), and different ctx length for upload / download (prevents client -> client)
+		if i.XorMode == 2 {
+			c.Conn = NewXorConn(conn, NewCTR(c.UnitedKey, c.PreWrite), NewCTR(c.UnitedKey, iv), 16, 0) // it doesn't matter if the attacker sends client's iv back to the client
+		}
+		return c, nil
+	}
+
+	if length < 1184+32+16 { // client may send more public keys in the future's version
+		return nil, errors.New("too short length")
+	}
+	encryptedPfsPublicKey := make([]byte, length)
+	if _, err := io.ReadFull(conn, encryptedPfsPublicKey); err != nil {
+		return nil, err
+	}
+	if _, err := nfsAEAD.Open(encryptedPfsPublicKey[:0], nil, encryptedPfsPublicKey, nil); err != nil {
+		return nil, err
+	}
+	mlkem768EKey, err := mlkem.NewEncapsulationKey768(encryptedPfsPublicKey[:1184])
+	if err != nil {
+		return nil, err
+	}
+	mlkem768Key, encapsulatedPfsKey := mlkem768EKey.Encapsulate()
+	peerX25519PKey, err := ecdh.X25519().NewPublicKey(encryptedPfsPublicKey[1184 : 1184+32])
+	if err != nil {
+		return nil, err
+	}
+	x25519SKey, _ := ecdh.X25519().GenerateKey(rand.Reader)
+	x25519Key, err := x25519SKey.ECDH(peerX25519PKey)
+	if err != nil {
+		return nil, err
+	}
+	pfsKey := make([]byte, 32+32) // no more capacity
+	copy(pfsKey, mlkem768Key)
+	copy(pfsKey[32:], x25519Key)
+	pfsPublicKey := append(encapsulatedPfsKey, x25519SKey.PublicKey().Bytes()...)
+	c.UnitedKey = append(pfsKey, nfsKey...)
+	c.AEAD = NewAEAD(pfsPublicKey, c.UnitedKey, c.UseAES)
+	c.PeerAEAD = NewAEAD(encryptedPfsPublicKey[:1184+32], c.UnitedKey, c.UseAES)
+
+	ticket := [16]byte{}
+	rand.Read(ticket[:])
+	var seconds int64
+	if i.SecondsTo == 0 {
+		seconds = i.SecondsFrom * crypto.RandBetween(50, 100) / 100
+	} else {
+		seconds = crypto.RandBetween(i.SecondsFrom, i.SecondsTo)
+	}
+	copy(ticket[:], EncodeLength(int(seconds)))
+	if seconds > 0 {
+		i.RWLock.Lock()
+		i.Lasts[(time.Now().Unix()+max(i.SecondsFrom, i.SecondsTo))/60+2] = ticket
+		i.Tickets = append(i.Tickets, ticket)
+		i.Sessions[ticket] = &ServerSession{PfsKey: pfsKey}
+		i.RWLock.Unlock()
+	}
+
+	pfsKeyExchangeLength := 1088 + 32 + 16
+	encryptedTicketLength := 32
+	paddingLength, paddingLens, paddingGaps := CreatPadding(i.PaddingLens, i.PaddingGaps)
+	serverHello := make([]byte, pfsKeyExchangeLength+encryptedTicketLength+paddingLength)
+	nfsAEAD.Seal(serverHello[:0], MaxNonce, pfsPublicKey, nil)
+	c.AEAD.Seal(serverHello[:pfsKeyExchangeLength], nil, ticket[:], nil)
+	padding := serverHello[pfsKeyExchangeLength+encryptedTicketLength:]
+	c.AEAD.Seal(padding[:0], nil, EncodeLength(paddingLength-18), nil)
+	c.AEAD.Seal(padding[:18], nil, padding[18:paddingLength-16], nil)
+
+	paddingLens[0] = pfsKeyExchangeLength + encryptedTicketLength + paddingLens[0]
+	for i, l := range paddingLens { // sends padding in a fragmented way, to create variable traffic pattern, before inner VLESS flow takes control
+		if l > 0 {
+			if _, err := conn.Write(serverHello[:l]); err != nil {
+				return nil, err
+			}
+			serverHello = serverHello[l:]
+		}
+		if len(paddingGaps) > i {
+			time.Sleep(paddingGaps[i])
+		}
+	}
+
+	// important: allows client sends padding slowly, eliminating 1-RTT's traffic pattern
+	if _, err := io.ReadFull(conn, encryptedLength); err != nil {
+		return nil, err
+	}
+	if _, err := nfsAEAD.Open(encryptedLength[:0], nil, encryptedLength, nil); err != nil {
+		return nil, err
+	}
+	encryptedPadding := make([]byte, DecodeLength(encryptedLength[:2]))
+	if _, err := io.ReadFull(conn, encryptedPadding); err != nil {
+		return nil, err
+	}
+	if _, err := nfsAEAD.Open(encryptedPadding[:0], nil, encryptedPadding, nil); err != nil {
+		return nil, err
+	}
+
+	if i.XorMode == 2 {
+		c.Conn = NewXorConn(conn, NewCTR(c.UnitedKey, ticket[:]), NewCTR(c.UnitedKey, iv), 0, 0)
+	}
+	return c, nil
+}

proxy/vless/encryption/xor.go

@@ -0,0 +1,93 @@
+package encryption
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"net"
+
+	"lukechampine.com/blake3"
+)
+
+func NewCTR(key, iv []byte) cipher.Stream {
+	k := make([]byte, 32)
+	blake3.DeriveKey(k, "VLESS", key) // avoids using key directly
+	block, _ := aes.NewCipher(k)
+	return cipher.NewCTR(block, iv)
+	//chacha20.NewUnauthenticatedCipher()
+}
+
+type XorConn struct {
+	net.Conn
+	CTR       cipher.Stream
+	PeerCTR   cipher.Stream
+	OutSkip   int
+	OutHeader []byte
+	InSkip    int
+	InHeader  []byte
+}
+
+func NewXorConn(conn net.Conn, ctr, peerCTR cipher.Stream, outSkip, inSkip int) *XorConn {
+	return &XorConn{
+		Conn:      conn,
+		CTR:       ctr,
+		PeerCTR:   peerCTR,
+		OutSkip:   outSkip,
+		OutHeader: make([]byte, 0, 5), // important
+		InSkip:    inSkip,
+		InHeader:  make([]byte, 0, 5), // important
+	}
+}
+
+func (c *XorConn) Write(b []byte) (int, error) {
+	if len(b) == 0 {
+		return 0, nil
+	}
+	for p := b; ; {
+		if len(p) <= c.OutSkip {
+			c.OutSkip -= len(p)
+			break
+		}
+		p = p[c.OutSkip:]
+		c.OutSkip = 0
+		need := 5 - len(c.OutHeader)
+		if len(p) < need {
+			c.OutHeader = append(c.OutHeader, p...)
+			c.CTR.XORKeyStream(p, p)
+			break
+		}
+		c.OutSkip, _ = DecodeHeader(append(c.OutHeader, p[:need]...))
+		c.OutHeader = c.OutHeader[:0]
+		c.CTR.XORKeyStream(p[:need], p[:need])
+		p = p[need:]
+	}
+	if _, err := c.Conn.Write(b); err != nil {
+		return 0, err
+	}
+	return len(b), nil
+}
+
+func (c *XorConn) Read(b []byte) (int, error) {
+	if len(b) == 0 {
+		return 0, nil
+	}
+	n, err := c.Conn.Read(b)
+	for p := b[:n]; ; {
+		if len(p) <= c.InSkip {
+			c.InSkip -= len(p)
+			break
+		}
+		p = p[c.InSkip:]
+		c.InSkip = 0
+		need := 5 - len(c.InHeader)
+		if len(p) < need {
+			c.PeerCTR.XORKeyStream(p, p)
+			c.InHeader = append(c.InHeader, p...)
+			break
+		}
+		c.PeerCTR.XORKeyStream(p[:need], p[:need])
+		c.InSkip, _ = DecodeHeader(append(c.InHeader, p[:need]...))
+		c.InHeader = c.InHeader[:0]
+		p = p[need:]
+	}
+	return n, err
+}

proxy/vless/inbound/config.pb.go

@@ -111,11 +111,13 @@ type Config struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Clients []*protocol.User `protobuf:"bytes,1,rep,name=clients,proto3" json:"clients,omitempty"`
-	// Decryption settings. Only applies to server side, and only accepts "none"
-	// for now.
-	Decryption string      `protobuf:"bytes,2,opt,name=decryption,proto3" json:"decryption,omitempty"`
-	Fallbacks  []*Fallback `protobuf:"bytes,3,rep,name=fallbacks,proto3" json:"fallbacks,omitempty"`
+	Clients     []*protocol.User `protobuf:"bytes,1,rep,name=clients,proto3" json:"clients,omitempty"`
+	Fallbacks   []*Fallback      `protobuf:"bytes,2,rep,name=fallbacks,proto3" json:"fallbacks,omitempty"`
+	Decryption  string           `protobuf:"bytes,3,opt,name=decryption,proto3" json:"decryption,omitempty"`
+	XorMode     uint32           `protobuf:"varint,4,opt,name=xorMode,proto3" json:"xorMode,omitempty"`
+	SecondsFrom int64            `protobuf:"varint,5,opt,name=seconds_from,json=secondsFrom,proto3" json:"seconds_from,omitempty"`
+	SecondsTo   int64            `protobuf:"varint,6,opt,name=seconds_to,json=secondsTo,proto3" json:"seconds_to,omitempty"`
+	Padding     string           `protobuf:"bytes,7,opt,name=padding,proto3" json:"padding,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -155,6 +157,13 @@ func (x *Config) GetClients() []*protocol.User {
 	return nil
 }
 
+func (x *Config) GetFallbacks() []*Fallback {
+	if x != nil {
+		return x.Fallbacks
+	}
+	return nil
+}
+
 func (x *Config) GetDecryption() string {
 	if x != nil {
 		return x.Decryption
@@ -162,11 +171,32 @@ func (x *Config) GetDecryption() string {
 	return ""
 }
 
-func (x *Config) GetFallbacks() []*Fallback {
+func (x *Config) GetXorMode() uint32 {
 	if x != nil {
-		return x.Fallbacks
+		return x.XorMode
 	}
-	return nil
+	return 0
+}
+
+func (x *Config) GetSecondsFrom() int64 {
+	if x != nil {
+		return x.SecondsFrom
+	}
+	return 0
+}
+
+func (x *Config) GetSecondsTo() int64 {
+	if x != nil {
+		return x.SecondsTo
+	}
+	return 0
+}
+
+func (x *Config) GetPadding() string {
+	if x != nil {
+		return x.Padding
+	}
+	return ""
 }
 
 var File_proxy_vless_inbound_config_proto protoreflect.FileDescriptor
@@ -185,25 +215,32 @@ var file_proxy_vless_inbound_config_proto_rawDesc = []byte{
 	0x68, 0x12, 0x12, 0x0a, 0x04, 0x74, 0x79, 0x70, 0x65, 0x18, 0x04, 0x20, 0x01, 0x28, 0x09, 0x52,
 	0x04, 0x74, 0x79, 0x70, 0x65, 0x12, 0x12, 0x0a, 0x04, 0x64, 0x65, 0x73, 0x74, 0x18, 0x05, 0x20,
 	0x01, 0x28, 0x09, 0x52, 0x04, 0x64, 0x65, 0x73, 0x74, 0x12, 0x12, 0x0a, 0x04, 0x78, 0x76, 0x65,
-	0x72, 0x18, 0x06, 0x20, 0x01, 0x28, 0x04, 0x52, 0x04, 0x78, 0x76, 0x65, 0x72, 0x22, 0xa0, 0x01,
+	0x72, 0x18, 0x06, 0x20, 0x01, 0x28, 0x04, 0x52, 0x04, 0x78, 0x76, 0x65, 0x72, 0x22, 0x96, 0x02,
 	0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x34, 0x0a, 0x07, 0x63, 0x6c, 0x69, 0x65,
 	0x6e, 0x74, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x1a, 0x2e, 0x78, 0x72, 0x61, 0x79,
 	0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c,
-	0x2e, 0x55, 0x73, 0x65, 0x72, 0x52, 0x07, 0x63, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x73, 0x12, 0x1e,
-	0x0a, 0x0a, 0x64, 0x65, 0x63, 0x72, 0x79, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x18, 0x02, 0x20, 0x01,
-	0x28, 0x09, 0x52, 0x0a, 0x64, 0x65, 0x63, 0x72, 0x79, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x12, 0x40,
-	0x0a, 0x09, 0x66, 0x61, 0x6c, 0x6c, 0x62, 0x61, 0x63, 0x6b, 0x73, 0x18, 0x03, 0x20, 0x03, 0x28,
+	0x2e, 0x55, 0x73, 0x65, 0x72, 0x52, 0x07, 0x63, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x73, 0x12, 0x40,
+	0x0a, 0x09, 0x66, 0x61, 0x6c, 0x6c, 0x62, 0x61, 0x63, 0x6b, 0x73, 0x18, 0x02, 0x20, 0x03, 0x28,
 	0x0b, 0x32, 0x22, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x76,
 	0x6c, 0x65, 0x73, 0x73, 0x2e, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x2e, 0x46, 0x61, 0x6c,
 	0x6c, 0x62, 0x61, 0x63, 0x6b, 0x52, 0x09, 0x66, 0x61, 0x6c, 0x6c, 0x62, 0x61, 0x63, 0x6b, 0x73,
-	0x42, 0x6a, 0x0a, 0x1c, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f,
-	0x78, 0x79, 0x2e, 0x76, 0x6c, 0x65, 0x73, 0x73, 0x2e, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64,
-	0x50, 0x01, 0x5a, 0x2d, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78,
-	0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x70, 0x72,
-	0x6f, 0x78, 0x79, 0x2f, 0x76, 0x6c, 0x65, 0x73, 0x73, 0x2f, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e,
-	0x64, 0xaa, 0x02, 0x18, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x56,
-	0x6c, 0x65, 0x73, 0x73, 0x2e, 0x49, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x62, 0x06, 0x70, 0x72,
-	0x6f, 0x74, 0x6f, 0x33,
+	0x12, 0x1e, 0x0a, 0x0a, 0x64, 0x65, 0x63, 0x72, 0x79, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x18, 0x03,
+	0x20, 0x01, 0x28, 0x09, 0x52, 0x0a, 0x64, 0x65, 0x63, 0x72, 0x79, 0x70, 0x74, 0x69, 0x6f, 0x6e,
+	0x12, 0x18, 0x0a, 0x07, 0x78, 0x6f, 0x72, 0x4d, 0x6f, 0x64, 0x65, 0x18, 0x04, 0x20, 0x01, 0x28,
+	0x0d, 0x52, 0x07, 0x78, 0x6f, 0x72, 0x4d, 0x6f, 0x64, 0x65, 0x12, 0x21, 0x0a, 0x0c, 0x73, 0x65,
+	0x63, 0x6f, 0x6e, 0x64, 0x73, 0x5f, 0x66, 0x72, 0x6f, 0x6d, 0x18, 0x05, 0x20, 0x01, 0x28, 0x03,
+	0x52, 0x0b, 0x73, 0x65, 0x63, 0x6f, 0x6e, 0x64, 0x73, 0x46, 0x72, 0x6f, 0x6d, 0x12, 0x1d, 0x0a,
+	0x0a, 0x73, 0x65, 0x63, 0x6f, 0x6e, 0x64, 0x73, 0x5f, 0x74, 0x6f, 0x18, 0x06, 0x20, 0x01, 0x28,
+	0x03, 0x52, 0x09, 0x73, 0x65, 0x63, 0x6f, 0x6e, 0x64, 0x73, 0x54, 0x6f, 0x12, 0x18, 0x0a, 0x07,
+	0x70, 0x61, 0x64, 0x64, 0x69, 0x6e, 0x67, 0x18, 0x07, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x70,
+	0x61, 0x64, 0x64, 0x69, 0x6e, 0x67, 0x42, 0x6a, 0x0a, 0x1c, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72,
+	0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x76, 0x6c, 0x65, 0x73, 0x73, 0x2e, 0x69,
+	0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x50, 0x01, 0x5a, 0x2d, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62,
+	0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63,
+	0x6f, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f, 0x76, 0x6c, 0x65, 0x73, 0x73, 0x2f,
+	0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0xaa, 0x02, 0x18, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x50,
+	0x72, 0x6f, 0x78, 0x79, 0x2e, 0x56, 0x6c, 0x65, 0x73, 0x73, 0x2e, 0x49, 0x6e, 0x62, 0x6f, 0x75,
+	0x6e, 0x64, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

proxy/vless/inbound/config.proto

@@ -19,8 +19,11 @@ message Fallback {
 
 message Config {
   repeated xray.common.protocol.User clients = 1;
-  // Decryption settings. Only applies to server side, and only accepts "none"
-  // for now.
-  string decryption = 2;
-  repeated Fallback fallbacks = 3;
+  repeated Fallback fallbacks = 2;
+
+  string decryption = 3;
+  uint32 xorMode = 4;
+  int64 seconds_from = 5;
+  int64 seconds_to = 6;
+  string padding = 7;
 }

proxy/vless/inbound/inbound.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"context"
 	gotls "crypto/tls"
+	"encoding/base64"
 	"io"
 	"reflect"
 	"strconv"
@@ -29,6 +30,8 @@ import (
 	"github.com/xtls/xray-core/proxy"
 	"github.com/xtls/xray-core/proxy/vless"
 	"github.com/xtls/xray-core/proxy/vless/encoding"
+	"github.com/xtls/xray-core/proxy/vless/encryption"
+	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet/reality"
 	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tls"
@@ -67,6 +70,7 @@ type Handler struct {
 	policyManager         policy.Manager
 	validator             vless.Validator
 	dns                   dns.Client
+	decryption            *encryption.ServerInstance
 	fallbacks             map[string]map[string]map[string]*Fallback // or nil
 	// regexps               map[string]*regexp.Regexp       // or nil
 }
@@ -81,6 +85,19 @@ func New(ctx context.Context, config *Config, dc dns.Client, validator vless.Val
 		validator:             validator,
 	}
 
+	if config.Decryption != "" && config.Decryption != "none" {
+		s := strings.Split(config.Decryption, ".")
+		var nfsSKeysBytes [][]byte
+		for _, r := range s {
+			b, _ := base64.RawURLEncoding.DecodeString(r)
+			nfsSKeysBytes = append(nfsSKeysBytes, b)
+		}
+		handler.decryption = &encryption.ServerInstance{}
+		if err := handler.decryption.Init(nfsSKeysBytes, config.XorMode, config.SecondsFrom, config.SecondsTo, config.Padding); err != nil {
+			return nil, errors.New("failed to use decryption").Base(err).AtError()
+		}
+	}
+
 	if config.Fallbacks != nil {
 		handler.fallbacks = make(map[string]map[string]map[string]*Fallback)
 		// handler.regexps = make(map[string]*regexp.Regexp)
@@ -159,6 +176,9 @@ func isMuxAndNotXUDP(request *protocol.RequestHeader, first *buf.Buffer) bool {
 
 // Close implements common.Closable.Close().
 func (h *Handler) Close() error {
+	if h.decryption != nil {
+		h.decryption.Close()
+	}
 	return errors.Combine(common.Close(h.validator))
 }
 
@@ -199,6 +219,13 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 		iConn = statConn.Connection
 	}
 
+	if h.decryption != nil {
+		var err error
+		if connection, err = h.decryption.Handshake(connection, nil); err != nil {
+			return errors.New("ML-KEM-768 handshake failed").Base(err).AtInfo()
+		}
+	}
+
 	sessionPolicy := h.policyManager.ForLevel(0)
 	if err := connection.SetReadDeadline(time.Now().Add(sessionPolicy.Timeouts.Handshake)); err != nil {
 		return errors.New("unable to set read deadline").Base(err).AtWarning()
@@ -478,7 +505,13 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 			case protocol.RequestCommandTCP:
 				var t reflect.Type
 				var p uintptr
-				if tlsConn, ok := iConn.(*tls.Conn); ok {
+				if commonConn, ok := connection.(*encryption.CommonConn); ok {
+					if _, ok := commonConn.Conn.(*encryption.XorConn); ok || !proxy.IsRAWTransportWithoutSecurity(iConn) {
+						inbound.CanSpliceCopy = 3 // full-random xorConn / non-RAW transport / another securityConn should not be penetrated
+					}
+					t = reflect.TypeOf(commonConn).Elem()
+					p = uintptr(unsafe.Pointer(commonConn))
+				} else if tlsConn, ok := iConn.(*tls.Conn); ok {
 					if tlsConn.ConnectionState().Version != gotls.VersionTLS13 {
 						return errors.New(`failed to use `+requestAddons.Flow+`, found outer tls version `, tlsConn.ConnectionState().Version).AtWarning()
 					}
@@ -519,89 +552,24 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 		ctx = session.ContextWithAllowedNetwork(ctx, net.Network_UDP)
 	}
 
-	sessionPolicy = h.policyManager.ForLevel(request.User.Level)
-	ctx, cancel := context.WithCancel(ctx)
-	timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
-	inbound.Timer = timer
-	ctx = policy.ContextWithBufferPolicy(ctx, sessionPolicy.Buffer)
-
-	link, err := dispatcher.Dispatch(ctx, request.Destination())
-	if err != nil {
-		return errors.New("failed to dispatch request to ", request.Destination()).Base(err).AtWarning()
-	}
-
-	serverReader := link.Reader // .(*pipe.Reader)
-	serverWriter := link.Writer // .(*pipe.Writer)
 	trafficState := proxy.NewTrafficState(userSentID)
-	postRequest := func() error {
-		defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
-
-		// default: clientReader := reader
-		clientReader := encoding.DecodeBodyAddons(reader, request, requestAddons)
-
-		var err error
-
-		if requestAddons.Flow == vless.XRV {
-			ctx1 := session.ContextWithInbound(ctx, nil) // TODO enable splice
-			clientReader = proxy.NewVisionReader(clientReader, trafficState, true, ctx1)
-			err = encoding.XtlsRead(clientReader, serverWriter, timer, connection, input, rawInput, trafficState, nil, true, ctx1)
-		} else {
-			// from clientReader.ReadMultiBuffer to serverWriter.WriteMultiBuffer
-			err = buf.Copy(clientReader, serverWriter, buf.UpdateActivity(timer))
-		}
-
-		if err != nil {
-			return errors.New("failed to transfer request payload").Base(err).AtInfo()
-		}
-
-		return nil
+	clientReader := encoding.DecodeBodyAddons(reader, request, requestAddons)
+	if requestAddons.Flow == vless.XRV {
+		clientReader = proxy.NewVisionReader(clientReader, trafficState, true, ctx, connection, input, rawInput, nil)
 	}
 
-	getResponse := func() error {
-		defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)
-
-		bufferWriter := buf.NewBufferedWriter(buf.NewWriter(connection))
-		if err := encoding.EncodeResponseHeader(bufferWriter, request, responseAddons); err != nil {
-			return errors.New("failed to encode response header").Base(err).AtWarning()
-		}
-
-		// default: clientWriter := bufferWriter
-		clientWriter := encoding.EncodeBodyAddons(bufferWriter, request, requestAddons, trafficState, false, ctx)
-		multiBuffer, err1 := serverReader.ReadMultiBuffer()
-		if err1 != nil {
-			return err1 // ...
-		}
-		if err := clientWriter.WriteMultiBuffer(multiBuffer); err != nil {
-			return err // ...
-		}
-		// Flush; bufferWriter.WriteMultiBuffer now is bufferWriter.writer.WriteMultiBuffer
-		if err := bufferWriter.SetBuffered(false); err != nil {
-			return errors.New("failed to write A response payload").Base(err).AtWarning()
-		}
-
-		var err error
-		if requestAddons.Flow == vless.XRV {
-			err = encoding.XtlsWrite(serverReader, clientWriter, timer, connection, trafficState, nil, false, ctx)
-		} else {
-			// from serverReader.ReadMultiBuffer to clientWriter.WriteMultiBuffer
-			err = buf.Copy(serverReader, clientWriter, buf.UpdateActivity(timer))
-		}
-		if err != nil {
-			return errors.New("failed to transfer response payload").Base(err).AtInfo()
-		}
-		// Indicates the end of response payload.
-		switch responseAddons.Flow {
-		default:
-		}
-
-		return nil
+	bufferWriter := buf.NewBufferedWriter(buf.NewWriter(connection))
+	if err := encoding.EncodeResponseHeader(bufferWriter, request, responseAddons); err != nil {
+		return errors.New("failed to encode response header").Base(err).AtWarning()
 	}
+	clientWriter := encoding.EncodeBodyAddons(bufferWriter, request, requestAddons, trafficState, false, ctx, connection, nil)
+	bufferWriter.SetFlushNext()
 
-	if err := task.Run(ctx, task.OnSuccess(postRequest, task.Close(serverWriter)), getResponse); err != nil {
-		common.Interrupt(serverReader)
-		common.Interrupt(serverWriter)
-		return errors.New("connection ends").Base(err).AtInfo()
+	if err := dispatcher.DispatchLink(ctx, request.Destination(), &transport.Link{
+		Reader: clientReader,
+		Writer: clientWriter},
+	); err != nil {
+		return errors.New("failed to dispatch request").Base(err)
 	}
-
 	return nil
 }

proxy/vless/outbound/outbound.go

@@ -4,7 +4,9 @@ import (
 	"bytes"
 	"context"
 	gotls "crypto/tls"
+	"encoding/base64"
 	"reflect"
+	"strings"
 	"time"
 	"unsafe"
 
@@ -24,6 +26,7 @@ import (
 	"github.com/xtls/xray-core/proxy"
 	"github.com/xtls/xray-core/proxy/vless"
 	"github.com/xtls/xray-core/proxy/vless/encoding"
+	"github.com/xtls/xray-core/proxy/vless/encryption"
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/reality"
@@ -43,6 +46,7 @@ type Handler struct {
 	serverPicker  protocol.ServerPicker
 	policyManager policy.Manager
 	cone          bool
+	encryption    *encryption.ClientInstance
 }
 
 // New creates a new VLess outbound handler.
@@ -64,6 +68,20 @@ func New(ctx context.Context, config *Config) (*Handler, error) {
 		cone:          ctx.Value("cone").(bool),
 	}
 
+	a := handler.serverPicker.PickServer().PickUser().Account.(*vless.MemoryAccount)
+	if a.Encryption != "" && a.Encryption != "none" {
+		s := strings.Split(a.Encryption, ".")
+		var nfsPKeysBytes [][]byte
+		for _, r := range s {
+			b, _ := base64.RawURLEncoding.DecodeString(r)
+			nfsPKeysBytes = append(nfsPKeysBytes, b)
+		}
+		handler.encryption = &encryption.ClientInstance{}
+		if err := handler.encryption.Init(nfsPKeysBytes, a.XorMode, a.Seconds, a.Padding); err != nil {
+			return nil, errors.New("failed to use encryption").Base(err).AtError()
+		}
+	}
+
 	return handler, nil
 }
 
@@ -98,6 +116,13 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	target := ob.Target
 	errors.LogInfo(ctx, "tunneling request to ", target, " via ", rec.Destination().NetAddr())
 
+	if h.encryption != nil {
+		var err error
+		if conn, err = h.encryption.Handshake(conn); err != nil {
+			return errors.New("ML-KEM-768 handshake failed").Base(err).AtInfo()
+		}
+	}
+
 	command := protocol.RequestCommandTCP
 	if target.Network == net.Network_UDP {
 		command = protocol.RequestCommandUDP
@@ -140,7 +165,13 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		case protocol.RequestCommandTCP:
 			var t reflect.Type
 			var p uintptr
-			if tlsConn, ok := iConn.(*tls.Conn); ok {
+			if commonConn, ok := conn.(*encryption.CommonConn); ok {
+				if _, ok := commonConn.Conn.(*encryption.XorConn); ok || !proxy.IsRAWTransportWithoutSecurity(iConn) {
+					ob.CanSpliceCopy = 3 // full-random xorConn / non-RAW transport / another securityConn should not be penetrated
+				}
+				t = reflect.TypeOf(commonConn).Elem()
+				p = uintptr(unsafe.Pointer(commonConn))
+			} else if tlsConn, ok := iConn.(*tls.Conn); ok {
 				t = reflect.TypeOf(tlsConn.Conn).Elem()
 				p = uintptr(unsafe.Pointer(tlsConn.Conn))
 			} else if utlsConn, ok := iConn.(*tls.UConn); ok {
@@ -194,7 +225,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		}
 
 		// default: serverWriter := bufferWriter
-		serverWriter := encoding.EncodeBodyAddons(bufferWriter, request, requestAddons, trafficState, true, ctx)
+		serverWriter := encoding.EncodeBodyAddons(bufferWriter, request, requestAddons, trafficState, true, ctx, conn, ob)
 		if request.Command == protocol.RequestCommandMux && request.Port == 666 {
 			serverWriter = xudp.NewPacketWriter(serverWriter, target, xudp.GetGlobalID(ctx))
 		}
@@ -222,7 +253,6 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 			return errors.New("failed to write A request payload").Base(err).AtWarning()
 		}
 
-		var err error
 		if requestAddons.Flow == vless.XRV {
 			if tlsConn, ok := iConn.(*tls.Conn); ok {
 				if tlsConn.ConnectionState().Version != gotls.VersionTLS13 {
@@ -233,12 +263,8 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 					return errors.New(`failed to use `+requestAddons.Flow+`, found outer tls version `, utlsConn.ConnectionState().Version).AtWarning()
 				}
 			}
-			ctx1 := session.ContextWithInbound(ctx, nil) // TODO enable splice
-			err = encoding.XtlsWrite(clientReader, serverWriter, timer, conn, trafficState, ob, true, ctx1)
-		} else {
-			// from clientReader.ReadMultiBuffer to serverWriter.WriteMultiBuffer
-			err = buf.Copy(clientReader, serverWriter, buf.UpdateActivity(timer))
 		}
+		err := buf.Copy(clientReader, serverWriter, buf.UpdateActivity(timer))
 		if err != nil {
 			return errors.New("failed to transfer request payload").Base(err).AtInfo()
 		}
@@ -261,7 +287,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		// default: serverReader := buf.NewReader(conn)
 		serverReader := encoding.DecodeBodyAddons(conn, request, responseAddons)
 		if requestAddons.Flow == vless.XRV {
-			serverReader = proxy.NewVisionReader(serverReader, trafficState, false, ctx)
+			serverReader = proxy.NewVisionReader(serverReader, trafficState, false, ctx, conn, input, rawInput, ob)
 		}
 		if request.Command == protocol.RequestCommandMux && request.Port == 666 {
 			if requestAddons.Flow == vless.XRV {
@@ -272,7 +298,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		}
 
 		if requestAddons.Flow == vless.XRV {
-			err = encoding.XtlsRead(serverReader, clientWriter, timer, conn, input, rawInput, trafficState, ob, false, ctx)
+			err = encoding.XtlsRead(serverReader, clientWriter, timer, conn, trafficState, false, ctx)
 		} else {
 			// from serverReader.ReadMultiBuffer to clientWriter.WriteMultiBuffer
 			err = buf.Copy(serverReader, clientWriter, buf.UpdateActivity(timer))

proxy/vmess/aead/authid.go

@@ -10,10 +10,10 @@ import (
 	"hash/crc32"
 	"io"
 	"math"
-	"time"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/antireplay"
+	"github.com/xtls/xray-core/proxy/vmess/vtime"
 )
 
 var (
@@ -105,7 +105,7 @@ func (a *AuthIDDecoderHolder) Match(authID [16]byte) (interface{}, error) {
 			continue
 		}
 
-		if math.Abs(math.Abs(float64(t))-float64(time.Now().Unix())) > 120 {
+		if math.Abs(math.Abs(float64(t))-float64(vtime.Now().Unix())) > 120 {
 			continue
 		}
 

proxy/vmess/aead/encrypt.go

@@ -5,14 +5,14 @@ import (
 	"crypto/rand"
 	"encoding/binary"
 	"io"
-	"time"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/crypto"
+	"github.com/xtls/xray-core/proxy/vmess/vtime"
 )
 
 func SealVMessAEADHeader(key [16]byte, data []byte) []byte {
-	generatedAuthID := CreateAuthID(key[:], time.Now().Unix())
+	generatedAuthID := CreateAuthID(key[:], vtime.Now().Unix())
 
 	connectionNonce := make([]byte, 8)
 	if _, err := io.ReadFull(rand.Reader, connectionNonce); err != nil {

proxy/vmess/vtime/vtime.go

@@ -0,0 +1,74 @@
+package vtime
+
+import (
+	"context"
+	"runtime"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/common/platform"
+	"github.com/xtls/xray-core/common/protocol/http"
+)
+
+var timeOffset atomic.Pointer[time.Duration]
+var initOnce sync.Once
+
+func updateTimeMonitor(ctx context.Context, domain string) {
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-time.After(10 * time.Minute):
+			err := updateTime(domain)
+			if err != nil {
+				errors.LogError(ctx, err)
+			}
+		}
+	}
+}
+
+func updateTime(domain string) error {
+	httpClient := http.NewClient()
+	resp, err := httpClient.Get(domain)
+	if err != nil {
+		return errors.New("Failed to access monitor domain").Base(err)
+	}
+	timeHeader := resp.Header.Get("Date")
+	remoteTime, err := time.Parse(time.RFC1123, timeHeader)
+	if err != nil {
+		return errors.New("Failed to parse time from monitor domain").Base(err)
+	}
+	localTime := time.Now()
+	offset := remoteTime.Sub(localTime)
+	if offset < 2*time.Second && offset > -2*time.Second {
+		errors.LogWarning(context.Background(), "Time offset too small, ignoring:", offset)
+		return nil
+	}
+	timeOffset.Store(&offset)
+	return nil
+}
+
+func Now() time.Time {
+	initOnce.Do(func() {
+		timeOffset.Store(new(time.Duration))
+		go func() {
+			domain := platform.NewEnvFlag("xray.vmess.time.domain").GetValue(func() string { return "https://apple.com" })
+			if domain == "" {
+				errors.LogError(context.Background(), "vmess time domain is empty, skip time sync")
+				return
+			}
+			err := updateTime(domain)
+			if err != nil {
+				errors.LogError(context.Background(), err)
+			}
+			errors.LogWarning(context.Background(), "Initial time offset for vmess:", timeOffset.Load())
+			// only one sync should be enough, so disable periodic update for now
+			//go updateTimeMonitor(context.TODO(), domain)
+		}()
+		runtime.Gosched()
+	})
+	offset := timeOffset.Load()
+	return time.Now().Add(*offset)
+}

proxy/wireguard/client.go

@@ -129,7 +129,8 @@ func (h *Handler) processWireGuard(ctx context.Context, dialer internet.Dialer)
 	}
 	defer func() {
 		if err != nil {
-			_ = h.bind.Close()
+			h.bind.Close()
+			h.bind = nil
 		}
 	}()
 

testing/scenarios/policy_test.go

@@ -249,7 +249,7 @@ func TestZeroBuffer(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 10240*1024, time.Second*20))
 	}
 	if err := errg.Wait(); err != nil {

testing/scenarios/reverse_test.go

@@ -182,7 +182,7 @@ func TestReverseProxy(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 32; i++ {
+	for range 32 {
 		errg.Go(testTCPConn(externalPort, 10240*1024, time.Second*40))
 	}
 
@@ -374,7 +374,7 @@ func TestReverseProxyLongRunning(t *testing.T) {
 
 	defer CloseAllServers(servers)
 
-	for i := 0; i < 4096; i++ {
+	for range 4096 {
 		if err := testTCPConn(externalPort, 1024, time.Second*20)(); err != nil {
 			t.Error(err)
 		}

testing/scenarios/shadowsocks_2022_test.go

@@ -124,7 +124,7 @@ func testShadowsocks2022Tcp(t *testing.T, method string, password string) {
 	defer CloseAllServers(servers)
 
 	var errGroup errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errGroup.Go(testTCPConn(clientPort, 10240*1024, time.Second*20))
 	}
 
@@ -207,7 +207,7 @@ func testShadowsocks2022Udp(t *testing.T, method string, password string) {
 	defer CloseAllServers(servers)
 
 	var errGroup errgroup.Group
-	for i := 0; i < 2; i++ {
+	for range 3 {
 		errGroup.Go(testUDPConn(udpClientPort, 1024, time.Second*5))
 	}
 

testing/scenarios/shadowsocks_test.go

@@ -96,7 +96,7 @@ func TestShadowsocksChaCha20Poly1305TCP(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errGroup errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errGroup.Go(testTCPConn(clientPort, 10240*1024, time.Second*20))
 	}
 	if err := errGroup.Wait(); err != nil {
@@ -192,7 +192,7 @@ func TestShadowsocksAES256GCMTCP(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errGroup errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errGroup.Go(testTCPConn(clientPort, 10240*1024, time.Second*20))
 	}
 
@@ -289,7 +289,7 @@ func TestShadowsocksAES128GCMUDP(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errGroup errgroup.Group
-	for i := 0; i < 2; i++ {
+	for range 3 {
 		errGroup.Go(testUDPConn(clientPort, 1024, time.Second*5))
 	}
 	if err := errGroup.Wait(); err != nil {
@@ -391,7 +391,7 @@ func TestShadowsocksAES128GCMUDPMux(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errGroup errgroup.Group
-	for i := 0; i < 2; i++ {
+	for range 3 {
 		errGroup.Go(testUDPConn(clientPort, 1024, time.Second*5))
 	}
 	if err := errGroup.Wait(); err != nil {
@@ -477,7 +477,7 @@ func TestShadowsocksNone(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errGroup errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errGroup.Go(testTCPConn(clientPort, 10240*1024, time.Second*20))
 	}
 

testing/scenarios/tls_test.go

@@ -240,7 +240,7 @@ func TestAutoIssuingCertificate(t *testing.T) {
 	common.Must(err)
 	defer CloseAllServers(servers)
 
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		if err := testTCPConn(clientPort, 1024, time.Second*20)(); err != nil {
 			t.Error(err)
 		}
@@ -449,7 +449,7 @@ func TestTLSOverWebSocket(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 10240*1024, time.Second*20))
 	}
 	if err := errg.Wait(); err != nil {
@@ -565,7 +565,7 @@ func TestGRPC(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 1024*10240, time.Second*40))
 	}
 	if err := errg.Wait(); err != nil {
@@ -681,7 +681,7 @@ func TestGRPCMultiMode(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 1024*10240, time.Second*40))
 	}
 	if err := errg.Wait(); err != nil {

testing/scenarios/vless_test.go

@@ -117,7 +117,7 @@ func TestVless(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 1024*1024, time.Second*30))
 	}
 	if err := errg.Wait(); err != nil {
@@ -239,7 +239,7 @@ func TestVlessTls(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 1024*1024, time.Second*30))
 	}
 	if err := errg.Wait(); err != nil {
@@ -363,7 +363,7 @@ func TestVlessXtlsVision(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 1024*1024, time.Second*30))
 	}
 	if err := errg.Wait(); err != nil {
@@ -502,7 +502,7 @@ func TestVlessXtlsVisionReality(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 1; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 1024*1024, time.Second*30))
 	}
 	if err := errg.Wait(); err != nil {

testing/scenarios/vmess_test.go

@@ -260,7 +260,7 @@ func TestVMessGCM(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 10240*1024, time.Second*40))
 	}
 
@@ -366,7 +366,7 @@ func TestVMessGCMReadv(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 10240*1024, time.Second*40))
 	}
 	if err := errg.Wait(); err != nil {
@@ -465,7 +465,7 @@ func TestVMessGCMUDP(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 2; i++ {
+	for range 3 {
 		errg.Go(testUDPConn(clientPort, 1024, time.Second*5))
 	}
 	if err := errg.Wait(); err != nil {
@@ -564,7 +564,7 @@ func TestVMessChacha20(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 10240*1024, time.Second*20))
 	}
 
@@ -664,7 +664,7 @@ func TestVMessNone(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 1024*1024, time.Second*30))
 	}
 	if err := errg.Wait(); err != nil {
@@ -771,7 +771,7 @@ func TestVMessKCP(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 2; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 1024, time.Minute*2))
 	}
 	if err := errg.Wait(); err != nil {
@@ -915,7 +915,7 @@ func TestVMessKCPLarge(t *testing.T) {
 	common.Must(err)
 
 	var errg errgroup.Group
-	for i := 0; i < 2; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 513*1024, time.Minute*5))
 	}
 	if err := errg.Wait(); err != nil {
@@ -1026,7 +1026,7 @@ func TestVMessGCMMux(t *testing.T) {
 
 	for range "abcd" {
 		var errg errgroup.Group
-		for i := 0; i < 16; i++ {
+		for range 3 {
 			errg.Go(testTCPConn(clientPort, 10240, time.Second*20))
 		}
 		if err := errg.Wait(); err != nil {
@@ -1152,7 +1152,7 @@ func TestVMessGCMMuxUDP(t *testing.T) {
 
 	for range "ab" {
 		var errg errgroup.Group
-		for i := 0; i < 2; i++ {
+		for range 3 {
 			errg.Go(testTCPConn(clientPort, 1024, time.Second*10))
 			errg.Go(testUDPConn(clientUDPPort, 1024, time.Second*10))
 		}
@@ -1259,7 +1259,7 @@ func TestVMessZero(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 1024*1024, time.Second*30))
 	}
 	if err := errg.Wait(); err != nil {
@@ -1361,7 +1361,7 @@ func TestVMessGCMLengthAuth(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 10240*1024, time.Second*40))
 	}
 
@@ -1465,7 +1465,7 @@ func TestVMessGCMLengthAuthPlusNoTerminationSignal(t *testing.T) {
 	defer CloseAllServers(servers)
 
 	var errg errgroup.Group
-	for i := 0; i < 10; i++ {
+	for range 3 {
 		errg.Go(testTCPConn(clientPort, 10240*1024, time.Second*40))
 	}
 

transport/internet/udp/dispatcher.go

@@ -22,8 +22,24 @@ type ResponseCallback func(ctx context.Context, packet *udp.Packet)
 
 type connEntry struct {
 	link   *transport.Link
-	timer  signal.ActivityUpdater
+	timer  *signal.ActivityTimer
 	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 {
@@ -32,6 +48,7 @@ type Dispatcher struct {
 	dispatcher routing.Dispatcher
 	callback   ResponseCallback
 	callClose  func() error
+	closed     bool
 }
 
 func NewDispatcher(dispatcher routing.Dispatcher, callback ResponseCallback) *Dispatcher {
@@ -44,13 +61,9 @@ func NewDispatcher(dispatcher routing.Dispatcher, callback ResponseCallback) *Di
 func (v *Dispatcher) RemoveRay() {
 	v.Lock()
 	defer v.Unlock()
-	v.removeRay()
-}
-
-func (v *Dispatcher) removeRay() {
+	v.closed = true
 	if v.conn != nil {
-		common.Interrupt(v.conn.link.Reader)
-		common.Close(v.conn.link.Writer)
+		v.conn.Close()
 		v.conn = nil
 	}
 }
@@ -59,35 +72,34 @@ 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 {
-		return v.conn, nil
+		if v.conn.closed {
+			v.conn = nil
+		} else {
+			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,
-		timer:  timer,
-		cancel: removeRay,
+		cancel: cancel,
 	}
+
+	entry.timer = signal.CancelAfterInactivity(ctx, entry.terminate, time.Minute)
 	v.conn = entry
 	go handleInput(ctx, entry, dest, v.callback, v.callClose)
 	return entry, nil
@@ -106,7 +118,7 @@ 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.cancel()
+			conn.Close()
 			return
 		}
 	}
@@ -114,7 +126,7 @@ 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.cancel()
+		conn.Close()
 		if callClose != nil {
 			callClose()
 		}

transport/pipe/impl.go

@@ -200,16 +200,19 @@ func (p *pipe) Interrupt() {
 	p.Lock()
 	defer p.Unlock()
 
+	if !p.data.IsEmpty() {
+		buf.ReleaseMulti(p.data)
+		p.data = nil
+		if p.state == closed {
+			p.state = errord
+		}
+	}
+
 	if p.state == closed || p.state == errord {
 		return
 	}
 
 	p.state = errord
 
-	if !p.data.IsEmpty() {
-		buf.ReleaseMulti(p.data)
-		p.data = nil
-	}
-
 	common.Must(p.done.Close())
 }