Fix documentation

Signed-off-by: 世界 <i@sekai.icu> Signed-off-by: unknowndevQwQ <unknowndevQwQ@pm.me>
Update documentation
2026-04-12 18:17:18 +10:00 · 2022-09-26 12:25:18 +08:00 · 2022-09-25 22:29:18 +08:00 · 2022-09-25 22:29:18 +08:00 · 2022-09-25 22:29:18 +08:00 · 2022-09-25 22:29:18 +08:00
79 changed files with 1355 additions and 815 deletions
--- a/15
+++ b/15
@@ -1,7 +1,8 @@
 NAME = sing-box
 COMMIT = $(shell git rev-parse --short HEAD)
 TAGS ?= with_gvisor,with_quic,with_wireguard,with_clash_api
-PARAMS = -v -trimpath -tags '$(TAGS)' -ldflags '-s -w -buildid='
+TAGS_TEST ?= with_gvisor,with_quic,with_wireguard,with_grpc,with_ech,with_utls,with_shadowsocksr
+PARAMS = -v -trimpath -tags "$(TAGS)" -ldflags "-s -w -buildid="
 MAIN = ./cmd/sing-box

 .PHONY: test release
@@ -59,13 +60,19 @@ release_install:
 	go install -v github.com/tcnksm/ghr@latest

 test:
-	@go test -v . && \
+	@go test -v ./... && \
 	cd test && \
 	go mod tidy && \
-	go test -v -tags with_gvisor,with_quic,with_wireguard,with_grpc,with_ech,with_utls,with_shadowsocksr .
+	go test -v -tags "$(TAGS_TEST)" .
+
+test_stdio:
+	@go test -v ./... && \
+	cd test && \
+	go mod tidy && \
+	go test -v -tags "$(TAGS_TEST),force_stdio" .

 clean:
-	rm -rf bin dist
+	rm -rf bin dist sing-box
 	rm -f $(shell go env GOPATH)/sing-box

 update:
--- a/adapter/experimental.go
+++ b/adapter/experimental.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"net"

+	"github.com/sagernet/sing-box/common/urltest"
 	N "github.com/sagernet/sing/common/network"
 )

@@ -12,6 +13,7 @@ type ClashServer interface {
 	Mode() string
 	StoreSelected() bool
 	CacheFile() ClashCacheFile
+	HistoryStorage() *urltest.HistoryStorage
 	RoutedConnection(ctx context.Context, conn net.Conn, metadata InboundContext, matchedRule Rule) (net.Conn, Tracker)
 	RoutedPacketConnection(ctx context.Context, conn N.PacketConn, metadata InboundContext, matchedRule Rule) (N.PacketConn, Tracker)
 }
--- a/adapter/upstream.go
+++ b/adapter/upstream.go
@@ -38,13 +38,25 @@ type myUpstreamHandlerWrapper struct {
 }

 func (w *myUpstreamHandlerWrapper) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
-	w.metadata.Destination = metadata.Destination
-	return w.connectionHandler(ctx, conn, w.metadata)
+	myMetadata := w.metadata
+	if metadata.Source.IsValid() {
+		myMetadata.Source = metadata.Source
+	}
+	if metadata.Destination.IsValid() {
+		myMetadata.Destination = metadata.Destination
+	}
+	return w.connectionHandler(ctx, conn, myMetadata)
 }

 func (w *myUpstreamHandlerWrapper) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata M.Metadata) error {
-	w.metadata.Destination = metadata.Destination
-	return w.packetHandler(ctx, conn, w.metadata)
+	myMetadata := w.metadata
+	if metadata.Source.IsValid() {
+		myMetadata.Source = metadata.Source
+	}
+	if metadata.Destination.IsValid() {
+		myMetadata.Destination = metadata.Destination
+	}
+	return w.packetHandler(ctx, conn, myMetadata)
 }

 func (w *myUpstreamHandlerWrapper) NewError(ctx context.Context, err error) {
@@ -78,13 +90,23 @@ func NewUpstreamContextHandler(

 func (w *myUpstreamContextHandlerWrapper) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
 	myMetadata := ContextFrom(ctx)
-	myMetadata.Destination = metadata.Destination
+	if metadata.Source.IsValid() {
+		myMetadata.Source = metadata.Source
+	}
+	if metadata.Destination.IsValid() {
+		myMetadata.Destination = metadata.Destination
+	}
 	return w.connectionHandler(ctx, conn, *myMetadata)
 }

 func (w *myUpstreamContextHandlerWrapper) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata M.Metadata) error {
 	myMetadata := ContextFrom(ctx)
-	myMetadata.Destination = metadata.Destination
+	if metadata.Source.IsValid() {
+		myMetadata.Source = metadata.Source
+	}
+	if metadata.Destination.IsValid() {
+		myMetadata.Destination = metadata.Destination
+	}
 	return w.packetHandler(ctx, conn, *myMetadata)
 }

--- a/common/baderror/baderror.go
+++ b/common/baderror/baderror.go
@@ -26,7 +26,7 @@ func WrapH2(err error) error {
 	if err == io.ErrUnexpectedEOF {
 		return io.EOF
 	}
-	if Contains(err, "client disconnected", "body closed by handler") {
+	if Contains(err, "client disconnected", "body closed by handler", "response body closed", "; CANCEL") {
 		return net.ErrClosed
 	}
 	return err
--- a/common/dialer/default.go
+++ b/common/dialer/default.go
@@ -110,7 +110,13 @@ func NewDefault(router adapter.Router, options option.DialerOptions) *DefaultDia
 	if options.TCPFastOpen {
 		warnTFOOnUnsupportedPlatform.Check()
 	}
-	if !options.UDPFragment {
+	var udpFragment bool
+	if options.UDPFragment != nil {
+		udpFragment = *options.UDPFragment
+	} else {
+		udpFragment = options.UDPFragmentDefault
+	}
+	if !udpFragment {
 		dialer.Control = control.Append(dialer.Control, control.DisableUDPFragment())
 		listener.Control = control.Append(listener.Control, control.DisableUDPFragment())
 	}
@@ -140,7 +146,7 @@ func (d *DefaultDialer) DialContext(ctx context.Context, network string, address
 	case N.NetworkUDP:
 		return d.udpDialer.DialContext(ctx, network, address.String())
 	}
-	return d.dialer.DialContext(ctx, network, address.Unwrap().String())
+	return d.dialer.DialContext(ctx, network, address.String())
 }

 func (d *DefaultDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
--- a/common/mux/client.go
+++ b/common/mux/client.go
@@ -466,10 +466,7 @@ func (c *ClientPacketAddrConn) ReadPacket(buffer *buf.Buffer) (destination M.Soc
 	if err != nil {
 		return
 	}
-	if buffer.FreeLen() < int(length) {
-		return destination, io.ErrShortBuffer
-	}
-	_, err = io.ReadFull(c.ExtendedConn, buffer.Extend(int(length)))
+	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
 	return
 }

--- a/common/mux/service.go
+++ b/common/mux/service.go
@@ -3,7 +3,6 @@ package mux
 import (
 	"context"
 	"encoding/binary"
-	"io"
 	"net"

 	"github.com/sagernet/sing-box/adapter"
@@ -15,6 +14,7 @@ import (
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
 	"github.com/sagernet/sing/common/rw"
+	"github.com/sagernet/sing/common/task"
 )

 func NewConnection(ctx context.Context, router adapter.Router, errorHandler E.Handler, logger log.ContextLogger, conn net.Conn, metadata adapter.InboundContext) error {
@@ -26,14 +26,21 @@ func NewConnection(ctx context.Context, router adapter.Router, errorHandler E.Ha
 	if err != nil {
 		return err
 	}
-	var stream net.Conn
-	for {
-		stream, err = session.Accept()
-		if err != nil {
-			return err
+	var group task.Group
+	group.Append0(func(ctx context.Context) error {
+		var stream net.Conn
+		for {
+			stream, err = session.Accept()
+			if err != nil {
+				return err
+			}
+			go newConnection(ctx, router, errorHandler, logger, stream, metadata)
 		}
-		go newConnection(ctx, router, errorHandler, logger, stream, metadata)
-	}
+	})
+	group.Cleanup(func() {
+		session.Close()
+	})
+	return group.Run(ctx)
 }

 func newConnection(ctx context.Context, router adapter.Router, errorHandler E.Handler, logger log.ContextLogger, stream net.Conn, metadata adapter.InboundContext) {
@@ -158,9 +165,6 @@ func (c *ServerPacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksad
 	if err != nil {
 		return
 	}
-	if buffer.FreeLen() < int(length) {
-		return destination, io.ErrShortBuffer
-	}
 	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
 	if err != nil {
 		return
@@ -223,9 +227,6 @@ func (c *ServerPacketAddrConn) ReadPacket(buffer *buf.Buffer) (destination M.Soc
 	if err != nil {
 		return
 	}
-	if buffer.FreeLen() < int(length) {
-		return destination, io.ErrShortBuffer
-	}
 	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
 	if err != nil {
 		return
--- a/common/process/searcher.go
+++ b/common/process/searcher.go
@@ -28,11 +28,5 @@ type Info struct {
 }

 func FindProcessInfo(searcher Searcher, ctx context.Context, network string, source netip.AddrPort, destination netip.AddrPort) (*Info, error) {
-	info, err := findProcessInfo(searcher, ctx, network, source, destination)
-	if err != nil {
-		if source.Addr().Is4In6() {
-			info, err = findProcessInfo(searcher, ctx, network, netip.AddrPortFrom(netip.AddrFrom4(source.Addr().As4()), source.Port()), destination)
-		}
-	}
-	return info, err
+	return findProcessInfo(searcher, ctx, network, source, destination)
 }
--- a/common/proxyproto/listener.go
+++ b/common/proxyproto/listener.go
@@ -36,8 +36,8 @@ func (l *Listener) Accept() (net.Conn, error) {
 	}
 	if header != nil {
 		return &bufio.AddrConn{Conn: conn, Metadata: M.Metadata{
-			Source:      M.SocksaddrFromNet(header.SourceAddr),
-			Destination: M.SocksaddrFromNet(header.DestinationAddr),
+			Source:      M.SocksaddrFromNet(header.SourceAddr).Unwrap(),
+			Destination: M.SocksaddrFromNet(header.DestinationAddr).Unwrap(),
 		}}, nil
 	}
 	return conn, nil
--- a/common/redir/tproxy_linux.go
+++ b/common/redir/tproxy_linux.go
@@ -2,14 +2,11 @@ package redir

 import (
 	"encoding/binary"
-	"net"
 	"net/netip"
-	"os"
-	"strconv"
 	"syscall"

+	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"
-	F "github.com/sagernet/sing/common/format"
 	M "github.com/sagernet/sing/common/metadata"

 	"golang.org/x/sys/unix"
@@ -32,6 +29,18 @@ func TProxy(fd uintptr, isIPv6 bool) error {
 	return err
 }

+func TProxyWriteBack() control.Func {
+	return func(network, address string, conn syscall.RawConn) error {
+		return control.Raw(conn, func(fd uintptr) error {
+			if M.ParseSocksaddr(address).Addr.Is6() {
+				return syscall.SetsockoptInt(int(fd), syscall.SOL_IPV6, unix.IPV6_TRANSPARENT, 1)
+			} else {
+				return syscall.SetsockoptInt(int(fd), syscall.SOL_IP, syscall.IP_TRANSPARENT, 1)
+			}
+		})
+	}
+}
+
 func GetOriginalDestinationFromOOB(oob []byte) (netip.AddrPort, error) {
 	controlMessages, err := unix.ParseSocketControlMessage(oob)
 	if err != nil {
@@ -46,79 +55,3 @@ func GetOriginalDestinationFromOOB(oob []byte) (netip.AddrPort, error) {
 	}
 	return netip.AddrPort{}, E.New("not found")
 }
-
-func DialUDP(lAddr *net.UDPAddr, rAddr *net.UDPAddr) (*net.UDPConn, error) {
-	rSockAddr, err := udpAddrToSockAddr(rAddr)
-	if err != nil {
-		return nil, err
-	}
-
-	lSockAddr, err := udpAddrToSockAddr(lAddr)
-	if err != nil {
-		return nil, err
-	}
-
-	fd, err := syscall.Socket(udpAddrFamily(lAddr, rAddr), syscall.SOCK_DGRAM, 0)
-	if err != nil {
-		return nil, err
-	}
-
-	if err = syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1); err != nil {
-		syscall.Close(fd)
-		return nil, err
-	}
-
-	if err = syscall.SetsockoptInt(fd, syscall.SOL_IP, syscall.IP_TRANSPARENT, 1); err != nil {
-		syscall.Close(fd)
-		return nil, err
-	}
-
-	if err = syscall.Bind(fd, lSockAddr); err != nil {
-		syscall.Close(fd)
-		return nil, err
-	}
-
-	if err = syscall.Connect(fd, rSockAddr); err != nil {
-		syscall.Close(fd)
-		return nil, err
-	}
-
-	fdFile := os.NewFile(uintptr(fd), F.ToString("net-udp-dial-", rAddr))
-	defer fdFile.Close()
-
-	c, err := net.FileConn(fdFile)
-	if err != nil {
-		syscall.Close(fd)
-		return nil, err
-	}
-
-	return c.(*net.UDPConn), nil
-}
-
-func udpAddrToSockAddr(addr *net.UDPAddr) (syscall.Sockaddr, error) {
-	switch {
-	case addr.IP.To4() != nil:
-		ip := [4]byte{}
-		copy(ip[:], addr.IP.To4())
-
-		return &syscall.SockaddrInet4{Addr: ip, Port: addr.Port}, nil
-
-	default:
-		ip := [16]byte{}
-		copy(ip[:], addr.IP.To16())
-
-		zoneID, err := strconv.ParseUint(addr.Zone, 10, 32)
-		if err != nil {
-			zoneID = 0
-		}
-
-		return &syscall.SockaddrInet6{Addr: ip, Port: addr.Port, ZoneId: uint32(zoneID)}, nil
-	}
-}
-
-func udpAddrFamily(lAddr, rAddr *net.UDPAddr) int {
-	if (lAddr == nil || lAddr.IP.To4() != nil) && (rAddr == nil || lAddr.IP.To4() != nil) {
-		return syscall.AF_INET
-	}
-	return syscall.AF_INET6
-}
--- a/common/redir/tproxy_other.go
+++ b/common/redir/tproxy_other.go
@@ -3,19 +3,20 @@
 package redir

 import (
-	"net"
 	"net/netip"
 	"os"
+
+	"github.com/sagernet/sing/common/control"
 )

 func TProxy(fd uintptr, isIPv6 bool) error {
 	return os.ErrInvalid
 }

+func TProxyWriteBack() control.Func {
+	return nil
+}
+
 func GetOriginalDestinationFromOOB(oob []byte) (netip.AddrPort, error) {
 	return netip.AddrPort{}, os.ErrInvalid
 }
-
-func DialUDP(lAddr *net.UDPAddr, rAddr *net.UDPAddr) (*net.UDPConn, error) {
-	return nil, os.ErrInvalid
-}
--- a/common/sniff/dns.go
+++ b/common/sniff/dns.go
@@ -11,6 +11,7 @@ import (
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
+	M "github.com/sagernet/sing/common/metadata"
 	"github.com/sagernet/sing/common/task"

 	mDNS "github.com/miekg/dns"
@@ -49,5 +50,8 @@ func DomainNameQuery(ctx context.Context, packet []byte) (*adapter.InboundContex
 	if err != nil {
 		return nil, err
 	}
+	if len(msg.Question) == 0 || msg.Question[0].Qclass != mDNS.ClassINET || !M.IsDomainName(msg.Question[0].Name) {
+		return nil, os.ErrInvalid
+	}
 	return &adapter.InboundContext{Protocol: C.ProtocolDNS}, nil
 }
--- a/common/sniff/domain.go
+++ b/common/sniff/domain.go
@@ -1,6 +0,0 @@
-package sniff
-
-import _ "unsafe" // for linkname
-
-//go:linkname IsDomainName net.isDomainName
-func IsDomainName(domain string) bool
--- a/common/tls/ech_client.go
+++ b/common/tls/ech_client.go
@@ -165,8 +165,6 @@ func newECHClient(router adapter.Router, serverAddress string, options option.Ou
 	return &echClientConfig{&tlsConfig}, nil
 }

-const typeHTTPS = 65
-
 func fetchECHClientConfig(router adapter.Router) func(ctx context.Context, serverName string) ([]cftls.ECHConfig, error) {
 	return func(ctx context.Context, serverName string) ([]cftls.ECHConfig, error) {
 		message := &mDNS.Msg{
--- a/common/tls/mkcert.go
+++ b/common/tls/mkcert.go
@@ -0,0 +1,50 @@
+package tls
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"math/big"
+	"time"
+)
+
+func GenerateKeyPair(serverName string) (*tls.Certificate, error) {
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		return nil, err
+	}
+	serialNumber, err := rand.Int(rand.Reader, new(big.Int).Lsh(big.NewInt(1), 128))
+	if err != nil {
+		return nil, err
+	}
+	template := &x509.Certificate{
+		SerialNumber:          serialNumber,
+		NotBefore:             time.Now().Add(time.Hour * -1),
+		NotAfter:              time.Now().Add(time.Hour),
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+		Subject: pkix.Name{
+			CommonName: serverName,
+		},
+		DNSNames: []string{serverName},
+	}
+	publicDer, err := x509.CreateCertificate(rand.Reader, template, template, key.Public(), key)
+	if err != nil {
+		return nil, err
+	}
+	privateDer, err := x509.MarshalPKCS8PrivateKey(key)
+	if err != nil {
+		return nil, err
+	}
+	publicPem := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: publicDer})
+	privPem := pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: privateDer})
+	keyPair, err := tls.X509KeyPair(publicPem, privPem)
+	if err != nil {
+		return nil, err
+	}
+	return &keyPair, err
+}
--- a/common/tls/std_server.go
+++ b/common/tls/std_server.go
@@ -34,6 +34,8 @@ func (c *STDServerConfig) SetNextProtos(nextProto []string) {
 	c.config.NextProtos = nextProto
 }

+var errInsecureUnused = E.New("tls: insecure unused")
+
 func newSTDServer(ctx context.Context, logger log.Logger, options option.InboundTLSOptions) (ServerConfig, error) {
 	if !options.Enabled {
 		return nil, nil
@@ -46,6 +48,9 @@ func newSTDServer(ctx context.Context, logger log.Logger, options option.Inbound
 		if err != nil {
 			return nil, err
 		}
+		if options.Insecure {
+			return nil, errInsecureUnused
+		}
 	} else {
 		tlsConfig = &tls.Config{}
 	}
@@ -102,17 +107,23 @@ func newSTDServer(ctx context.Context, logger log.Logger, options option.Inbound
 			}
 			key = content
 		}
-		if certificate == nil {
-			return nil, E.New("missing certificate")
+		if certificate == nil && key == nil && options.Insecure {
+			tlsConfig.GetCertificate = func(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
+				return GenerateKeyPair(info.ServerName)
+			}
+		} else {
+			if certificate == nil {
+				return nil, E.New("missing certificate")
+			} else if key == nil {
+				return nil, E.New("missing key")
+			}
+
+			keyPair, err := tls.X509KeyPair(certificate, key)
+			if err != nil {
+				return nil, E.Cause(err, "parse x509 key pair")
+			}
+			tlsConfig.Certificates = []tls.Certificate{keyPair}
 		}
-		if key == nil {
-			return nil, E.New("missing key")
-		}
-		keyPair, err := tls.X509KeyPair(certificate, key)
-		if err != nil {
-			return nil, E.Cause(err, "parse x509 key pair")
-		}
-		tlsConfig.Certificates = []tls.Certificate{keyPair}
 	}
 	return &STDServerConfig{
 		config:          tlsConfig,
--- a/constant/proxy.go
+++ b/constant/proxy.go
@@ -25,4 +25,5 @@ const (

 const (
 	TypeSelector = "selector"
+	TypeURLTest  = "urltest"
 )
--- a/constant/timeout.go
+++ b/constant/timeout.go
@@ -3,10 +3,11 @@ package constant
 import "time"

 const (
-	TCPTimeout         = 5 * time.Second
-	ReadPayloadTimeout = 300 * time.Millisecond
-	DNSTimeout         = 10 * time.Second
-	QUICTimeout        = 30 * time.Second
-	STUNTimeout        = 15 * time.Second
-	UDPTimeout         = 5 * time.Minute
+	TCPTimeout             = 5 * time.Second
+	ReadPayloadTimeout     = 300 * time.Millisecond
+	DNSTimeout             = 10 * time.Second
+	QUICTimeout            = 30 * time.Second
+	STUNTimeout            = 15 * time.Second
+	UDPTimeout             = 5 * time.Minute
+	DefaultURLTestInterval = 1 * time.Minute
 )
--- a/constant/version.go
+++ b/constant/version.go
@@ -1,3 +1,3 @@
 package constant

-var Version = "1.1-beta5"
+var Version = "1.1-beta8"
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -1,3 +1,32 @@
+#### 1.1-beta8
+
+* Fix leaks on close
+* Improve websocket writer
+* Refine tproxy write back
+* Refine 4in6 processing
+* Fix shadowsocks plugins
+* Fix missing source address from transport connection
+* Fix fqdn socks5 outbound connection
+* Fix read source address from grpc-go
+
+#### 1.0.5
+
+* Fix missing source address from transport connection
+* Fix fqdn socks5 outbound connection
+* Fix read source address from grpc-go
+
+#### 1.1-beta7
+
+* Add v2ray mux and XUDP support for VMess inbound
+* Add XUDP support for VMess outbound
+* Disable DF on direct outbound by default
+* Fix bugs in 1.1-beta6
+
+#### 1.1-beta6
+
+* Add [URLTest outbound](/configuration/outbound/urltest)
+* Fix bugs in 1.1-beta5
+
 #### 1.1-beta5

 * Print tags in version command
--- a/docs/configuration/outbound/index.md
+++ b/docs/configuration/outbound/index.md
@@ -15,21 +15,24 @@

 ### Fields

-| Type          | Format                       |
-|---------------|------------------------------|
-| `direct`      | [Direct](./direct)           |
-| `block`       | [Block](./block)             |
-| `socks`       | [SOCKS](./socks)             |
-| `http`        | [HTTP](./http)               |
-| `shadowsocks` | [Shadowsocks](./shadowsocks) |
-| `vmess`       | [VMess](./vmess)             |
-| `trojan`      | [Trojan](./trojan)           |
-| `wireguard`   | [Wireguard](./wireguard)     |
-| `hysteria`    | [Hysteria](./hysteria)       |
-| `tor`         | [Tor](./tor)                 |
-| `ssh`         | [SSH](./ssh)                 |
-| `dns`         | [DNS](./dns)                 |
-| `selector`    | [Selector](./selector)       |
+| Type           | Format                         |
+|----------------|--------------------------------|
+| `direct`       | [Direct](./direct)             |
+| `block`        | [Block](./block)               |
+| `socks`        | [SOCKS](./socks)               |
+| `http`         | [HTTP](./http)                 |
+| `shadowsocks`  | [Shadowsocks](./shadowsocks)   |
+| `vmess`        | [VMess](./vmess)               |
+| `trojan`       | [Trojan](./trojan)             |
+| `wireguard`    | [Wireguard](./wireguard)       |
+| `hysteria`     | [Hysteria](./hysteria)         |
+| `shadowsocksr` | [ShadowsocksR](./shadowsocksr) |
+| `vless`        | [VLESS](./vless)               |
+| `tor`          | [Tor](./tor)                   |
+| `ssh`          | [SSH](./ssh)                   |
+| `dns`          | [DNS](./dns)                   |
+| `selector`     | [Selector](./selector)         |
+| `urltest`      | [URLTest](./urltest)           |

 #### tag

--- a/docs/configuration/outbound/index.zh.md
+++ b/docs/configuration/outbound/index.zh.md
@@ -15,21 +15,24 @@

 ### 字段

-| 类型            | 格式                           |
-|---------------|------------------------------|
-| `direct`      | [Direct](./direct)           |
-| `block`       | [Block](./block)             |
-| `socks`       | [SOCKS](./socks)             |
-| `http`        | [HTTP](./http)               |
-| `shadowsocks` | [Shadowsocks](./shadowsocks) |
-| `vmess`       | [VMess](./vmess)             |
-| `trojan`      | [Trojan](./trojan)           |
-| `wireguard`   | [Wireguard](./wireguard)     |
-| `hysteria`    | [Hysteria](./hysteria)       |
-| `tor`         | [Tor](./tor)                 |
-| `ssh`         | [SSH](./ssh)                 |
-| `dns`         | [DNS](./dns)                 |
-| `selector`    | [Selector](./selector)       |
+| 类型             | 格式                             |
+|----------------|--------------------------------|
+| `direct`       | [Direct](./direct)             |
+| `block`        | [Block](./block)               |
+| `socks`        | [SOCKS](./socks)               |
+| `http`         | [HTTP](./http)                 |
+| `shadowsocks`  | [Shadowsocks](./shadowsocks)   |
+| `vmess`        | [VMess](./vmess)               |
+| `trojan`       | [Trojan](./trojan)             |
+| `wireguard`    | [Wireguard](./wireguard)       |
+| `hysteria`     | [Hysteria](./hysteria)         |
+| `shadowsocksr` | [ShadowsocksR](./shadowsocksr) |
+| `vless`        | [VLESS](./vless)               |
+| `tor`          | [Tor](./tor)                   |
+| `ssh`          | [SSH](./ssh)                   |
+| `dns`          | [DNS](./dns)                   |
+| `selector`     | [Selector](./selector)         |
+| `urltest`      | [URLTest](./urltest)           |

 #### tag

--- a/docs/configuration/outbound/urltest.md
+++ b/docs/configuration/outbound/urltest.md
@@ -0,0 +1,37 @@
+### Structure
+
+```json
+{
+  "type": "urltest",
+  "tag": "auto",
+  
+  "outbounds": [
+    "proxy-a",
+    "proxy-b",
+    "proxy-c"
+  ],
+  "url": "http://www.gstatic.com/generate_204",
+  "interval": "1m",
+  "tolerance": 50
+}
+```
+
+### Fields
+
+#### outbounds
+
+==Required==
+
+List of outbound tags to test.
+
+#### url
+
+The URL to test. `http://www.gstatic.com/generate_204` will be used if empty.
+
+#### interval
+
+The test interval. `1m` will be used if empty.
+
+#### tolerance
+
+The test tolerance in milliseconds. `50` will be used if empty.
--- a/docs/configuration/outbound/urltest.zh.md
+++ b/docs/configuration/outbound/urltest.zh.md
@@ -0,0 +1,37 @@
+### 结构
+
+```json
+{
+  "type": "urltest",
+  "tag": "auto",
+  
+  "outbounds": [
+    "proxy-a",
+    "proxy-b",
+    "proxy-c"
+  ],
+  "url": "http://www.gstatic.com/generate_204",
+  "interval": "1m",
+  "tolerance": 50
+}
+```
+
+### 字段
+
+#### outbounds
+
+==必填==
+
+用于测试的出站标签列表。
+
+#### url
+
+用于测试的链接。默认使用 `http://www.gstatic.com/generate_204`。
+
+#### interval
+
+测试间隔。 默认使用 `1m`。
+
+#### tolerance
+
+以毫秒为单位的测试容差。 默认使用 `50`。
--- a/docs/configuration/outbound/vmess.md
+++ b/docs/configuration/outbound/vmess.md
@@ -14,7 +14,7 @@
  "authenticated_length": true,
  "network": "tcp",
  "tls": {},
-  "packet_addr": false,
+  "packet_encoding": "",
  "multiplex": {},
  "transport": {},

@@ -84,9 +84,13 @@ Both is enabled by default.

 TLS configuration, see [TLS](/configuration/shared/tls/#outbound).

-#### packet_addr
+#### packet_encoding

-Enable packetaddr support.
+| Encoding   | Description           |
+|------------|-----------------------|
+| (none)     | Disabled              |
+| packetaddr | Supported by v2ray 5+ |
+| xudp       | Supported by xray     |

 #### multiplex

--- a/docs/configuration/outbound/vmess.zh.md
+++ b/docs/configuration/outbound/vmess.zh.md
@@ -14,7 +14,7 @@
  "authenticated_length": true,
  "network": "tcp",
  "tls": {},
-  "packet_addr": false,
+  "packet_encoding": "",
  "multiplex": {},
  "transport": {},

@@ -84,9 +84,13 @@ VMess 用户 ID。

 TLS 配置, 参阅 [TLS](/zh/configuration/shared/tls/#outbound)。

-#### packet_addr
+#### packet_encoding

-启用 packetaddr 支持。
+| 编码         | 描述            |
+|------------|---------------|
+| (空)        | 禁用            |
+| packetaddr | 由 v2ray 5+ 支持 |
+| xudp       | 由 xray 支持     |

 #### multiplex

--- a/docs/features.md
+++ b/docs/features.md
@@ -95,7 +95,9 @@
 | cn                | 17.8M    | 140.3M     |
 | cn (Loyalsoldier) | 74.3M    | 246.7M     |

-#### Shadowsocks benchmark
+#### Benchmark
+
+##### Shadowsocks

 | /                                  |   none    | aes-128-gcm | 2022-blake3-aes-128-gcm |
 |------------------------------------|:---------:|:-----------:|:-----------------------:|
@@ -103,6 +105,13 @@
 | shadowsocks-rust (v1.15.0-alpha.5) | 10.7 Gbps |      /      |        9.36 Gbps        |
 | sing-box                           | 29.0 Gbps |      /      |        11.8 Gbps        |

+##### VMess
+
+| /                  |    TCP    |   HTTP    |  H2 TLS   | WebSocket TLS | gRPC TLS  |
+|--------------------|:---------:|:---------:|:---------:|:-------------:|:---------:|
+| v2ray-core (5.1.0) | 7.86 GBps | 2.86 Gbps | 1.83 Gbps |   2.36 Gbps   | 2.43 Gbps |
+| sing-box           | 7.96 Gbps | 8.09 Gbps | 6.11 Gbps |   8.02 Gbps   | 6.35 Gbps |
+
 #### License

 | /          | License                           |
--- a/docs/index.md
+++ b/docs/index.md
@@ -45,10 +45,6 @@ sing-box version
 It is also recommended to use systemd to manage sing-box service,
 see [Linux server installation example](./examples/linux-server-installation).

-## Contributors
-
-[![](https://opencollective.com/sagernet/contributors.svg?width=740&button=false)](https://github.com/sagernet/sing-box/graphs/contributors)
-
 ## License

 ```
--- a/docs/index.zh.md
+++ b/docs/index.zh.md
@@ -25,13 +25,13 @@ go install -v -tags with_clash_api github.com/sagernet/sing-box/cmd/sing-box@lat
 | 构建标志                         | 描述                                                                                                                                                                                                                                                                           |
 |------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | `with_quic`                  | 启用 QUIC 支持，参阅 [QUIC 和 HTTP3 DNS 传输层](./configuration/dns/server)，[Naive 入站](./configuration/inbound/naive)，[Hysteria 入站](./configuration/inbound/hysteria)，[Hysteria 出站](./configuration/outbound/hysteria) 和 [V2Ray 传输层#QUIC](./configuration/shared/v2ray-transport#quic)。 |
-| `with_grpc`                  | 启用标准 gRPCuTLS](https://github.com/refraction-networking/utls) 支持， 参阅 [TLS](./configuration/shared/tls#utls)。                                                                                                                                                                      |
-| `with_acme`                  | 启用 ACME TLS 证书签发支持，参阅 [TLS](./configuration/shared/tls)。                                                                                                                                                                                                                     |
-| `with_clash_api`             | 启用 Clash api 支 支持，参阅 [V2Ray 传输层#gRPC](./configuration/shared/v2ray-transport#grpc)。                                                                                                                                                                                               |
+| `with_grpc`                  | 启用标准 gRPC 支持，参阅 [V2Ray 传输层#gRPC](./configuration/shared/v2ray-transport#grpc)。                                                                                                                                                                                               |
 | `with_wireguard`             | 启用 WireGuard 支持，参阅 [WireGuard 出站](./configuration/outbound/wireguard)。                                                                                                                                                                                                       |
 | `with_shadowsocksr`          | 启用 ShadowsocksR 支持，参阅 [ShadowsocksR 出站](./configuration/outbound/shadowsocksr)。                                                                                                                                                                                              |
 | `with_ech`                   | 启用 TLS ECH 扩展支持，参阅 [TLS](./configuration/shared/tls#ech)。                                                                                                                                                                                                                    |
-| `with_utls`                  | 启用 [持，参阅 [实验性](./configuration/experimental#clash-api-fields)。                                                                                                                                                                                                     |
+| `with_utls`                  | 启用 uTLS 支持，参阅 [实验性](./configuration/experimental#clash-api-fields)。                                                                                                                                                                                                          |
+| `with_acme`                  | 启用 ACME TLS 证书签发支持，参阅 [TLS](./configuration/shared/tls)。                                                                                                                                                                                                                     |
+| `with_clash_api`             | 启用 Clash API 支持，参阅 [实验性](./configuration/experimental#clash-api-fields)。                                                                                                                                                                                                     |
 | `with_gvisor`                | 启用 gVisor 支持，参阅 [Tun 入站](./configuration/inbound/tun#stack) 和 [WireGuard 出站](./configuration/outbound/wireguard#system_interface)。                                                                                                                                           |
 | `with_embedded_tor` (需要 CGO) | 启用 嵌入式 Tor 支持，参阅 [Tor 出站](./configuration/outbound/tor)。                                                                                                                                                                                                                     |
 | `with_lwip` (需要 CGO)         | 启用 LWIP Tun 栈支持，参阅 [Tun 入站](./configuration/inbound/tun#stack)。                                                                                                                                                                                                              |
@@ -42,13 +42,9 @@ go install -v -tags with_clash_api github.com/sagernet/sing-box/cmd/sing-box@lat
 sing-box version
 ```

-同时推荐使用 Systemd 来管理 sing-box 服务器实例。
+同时推荐使用 systemd 来管理 sing-box 服务器实例。
 参阅 [Linux 服务器安装示例](./examples/linux-server-installation)。

-## 贡献者
-
-[![](https://opencollective.com/sagernet/contributors.svg?width=740&button=false)](https://github.com/sagernet/sing-box/graphs/contributors)
-
 ## 授权

 ```
--- a/experimental/clashapi/proxies.go
+++ b/experimental/clashapi/proxies.go
@@ -61,7 +61,6 @@ func findProxyByName(router adapter.Router) func(next http.Handler) http.Handler
 func proxyInfo(server *Server, detour adapter.Outbound) *badjson.JSONObject {
 	var info badjson.JSONObject
 	var clashType string
-	var isGroup bool
 	switch detour.Type() {
 	case C.TypeDirect:
 		clashType = "Direct"
@@ -91,7 +90,8 @@ func proxyInfo(server *Server, detour adapter.Outbound) *badjson.JSONObject {
 		clashType = "SSH"
 	case C.TypeSelector:
 		clashType = "Selector"
-		isGroup = true
+	case C.TypeURLTest:
+		clashType = "URLTest"
 	default:
 		clashType = "Direct"
 	}
@@ -104,10 +104,9 @@ func proxyInfo(server *Server, detour adapter.Outbound) *badjson.JSONObject {
 	} else {
 		info.Put("history", []*urltest.History{})
 	}
-	if isGroup {
-		selector := detour.(adapter.OutboundGroup)
-		info.Put("now", selector.Now())
-		info.Put("all", selector.All())
+	if group, isGroup := detour.(adapter.OutboundGroup); isGroup {
+		info.Put("now", group.Now())
+		info.Put("all", group.All())
 	}
 	return &info
 }
--- a/experimental/clashapi/server.go
+++ b/experimental/clashapi/server.go
@@ -144,6 +144,10 @@ func (s *Server) CacheFile() adapter.ClashCacheFile {
 	return s.cacheFile
 }

+func (s *Server) HistoryStorage() *urltest.HistoryStorage {
+	return s.urlTestHistory
+}
+
 func (s *Server) RoutedConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, matchedRule adapter.Rule) (net.Conn, adapter.Tracker) {
 	tracker := trafficontrol.NewTCPTracker(conn, s.trafficManager, castMetadata(metadata), s.router, matchedRule)
 	return tracker, tracker
--- a/go.mod
+++ b/go.mod
@@ -23,21 +23,21 @@ require (
 	github.com/pires/go-proxyproto v0.6.2
 	github.com/refraction-networking/utls v1.1.2
 	github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb
-	github.com/sagernet/sing v0.0.0-20220915031330-38f39bc0c690
-	github.com/sagernet/sing-dns v0.0.0-20220913115644-aebff1dfbba8
+	github.com/sagernet/sing v0.0.0-20220925112014-b12b8b7fd220
+	github.com/sagernet/sing-dns v0.0.0-20220915084601-812e0864b45b
 	github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6
-	github.com/sagernet/sing-tun v0.0.0-20220915032336-60b1da576469
-	github.com/sagernet/sing-vmess v0.0.0-20220913015714-c4ab86d40e12
+	github.com/sagernet/sing-tun v0.0.0-20220925112147-6bad0c2380ca
+	github.com/sagernet/sing-vmess v0.0.0-20220925083655-063bc85ea685
 	github.com/sagernet/smux v0.0.0-20220831015742-e0f1988e3195
 	github.com/sagernet/websocket v0.0.0-20220913015213-615516348b4e
 	github.com/spf13/cobra v1.5.0
 	github.com/stretchr/testify v1.8.0
 	go.etcd.io/bbolt v1.3.6
 	go.uber.org/atomic v1.10.0
-	go4.org/netipx v0.0.0-20220812043211-3cc044ffd68d
-	golang.org/x/crypto v0.0.0-20220829220503-c86fa9a7ed90
-	golang.org/x/net v0.0.0-20220909164309-bea034e7d591
-	golang.org/x/sys v0.0.0-20220913120320-3275c407cedc
+	go4.org/netipx v0.0.0-20220925034521-797b0c90d8ab
+	golang.org/x/crypto v0.0.0-20220924013350-4ba4fb4dd9e7
+	golang.org/x/net v0.0.0-20220923203811-8be639271d50
+	golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8
 	golang.zx2c4.com/wireguard v0.0.0-20220829161405-d1d08426b27b
 	google.golang.org/grpc v1.49.0
 	google.golang.org/protobuf v1.28.1
--- a/go.sum
+++ b/go.sum
@@ -145,16 +145,16 @@ github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb h1:wc0yQ+SBn4TaTY
 github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb/go.mod h1:MIccjRKnPTjWwAOpl+AUGWOkzyTd9tERytudxu+1ra4=
 github.com/sagernet/sing v0.0.0-20220812082120-05f9836bff8f/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
 github.com/sagernet/sing v0.0.0-20220817130738-ce854cda8522/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
-github.com/sagernet/sing v0.0.0-20220915031330-38f39bc0c690 h1:pvaLdkDmsGN2K46vf8rorAhYGFvKPuQNzcofuy3aXXg=
-github.com/sagernet/sing v0.0.0-20220915031330-38f39bc0c690/go.mod h1:x3NHUeJBQwV75L51zwmLKQdLtRvR+M4PmXkfQtU1vIY=
-github.com/sagernet/sing-dns v0.0.0-20220913115644-aebff1dfbba8 h1:Iyfl+Rm5jcDvXuy/jpOBI3eu35ujci50tkqYHHwwg+8=
-github.com/sagernet/sing-dns v0.0.0-20220913115644-aebff1dfbba8/go.mod h1:bPVnJ5gJ0WmUfN1bJP9Cis0ab8SSByx6JVzyLJjDMwA=
+github.com/sagernet/sing v0.0.0-20220925112014-b12b8b7fd220 h1:fQk/BHOeHw5murjeNTdmkXmDy9cMlbubRINRH7GDuu4=
+github.com/sagernet/sing v0.0.0-20220925112014-b12b8b7fd220/go.mod h1:5/u6RMDMoGIkSNtrZb41kJvyIFg3Ysn69P3WiAu8m0c=
+github.com/sagernet/sing-dns v0.0.0-20220915084601-812e0864b45b h1:cXCMNJ9heZ+c6l+qUcku60x9KyXo4SOAaJfg/6spOmU=
+github.com/sagernet/sing-dns v0.0.0-20220915084601-812e0864b45b/go.mod h1:SrvWLfOSlnFmH32CWXicfilAGgIXR0VjrH6yRbuXYww=
 github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6 h1:JJfDeYYhWunvtxsU/mOVNTmFQmnzGx9dY034qG6G3g4=
 github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6/go.mod h1:EX3RbZvrwAkPI2nuGa78T2iQXmrkT+/VQtskjou42xM=
-github.com/sagernet/sing-tun v0.0.0-20220915032336-60b1da576469 h1:tvGUJsOqxZ3ofAY9undQfQ+JCWvmIwLpIOC+XaBFO88=
-github.com/sagernet/sing-tun v0.0.0-20220915032336-60b1da576469/go.mod h1:5AhPUv9jWDQ3pv3Mj78SL/1TSjhoaj6WNASxRKLqXqM=
-github.com/sagernet/sing-vmess v0.0.0-20220913015714-c4ab86d40e12 h1:4HYGbTDDemgBVTmaspXbkgjJlXc3hYVjNxSddJndq8Y=
-github.com/sagernet/sing-vmess v0.0.0-20220913015714-c4ab86d40e12/go.mod h1:u66Vv7NHXJWfeAmhh7JuJp/cwxmuQlM56QoZ7B7Mmd0=
+github.com/sagernet/sing-tun v0.0.0-20220925112147-6bad0c2380ca h1:Owgx9izFNYyMyUZ61td+mL3vumBhJz4zNismYlCyQbw=
+github.com/sagernet/sing-tun v0.0.0-20220925112147-6bad0c2380ca/go.mod h1:ftP5VXlp3RJO5+WS3mPFk7jB9B/K/QrPEZX3BUORGQY=
+github.com/sagernet/sing-vmess v0.0.0-20220925083655-063bc85ea685 h1:AZzFNRR/ZwMTceUQ1b/mxx6oyKqmFymdMn/yleJmoVM=
+github.com/sagernet/sing-vmess v0.0.0-20220925083655-063bc85ea685/go.mod h1:bwhAdSNET1X+j9DOXGj9NIQR39xgcWIk1rOQ9lLD+gM=
 github.com/sagernet/smux v0.0.0-20220831015742-e0f1988e3195 h1:5VBIbVw9q7aKbrFdT83mjkyvQ+VaRsQ6yflTepfln38=
 github.com/sagernet/smux v0.0.0-20220831015742-e0f1988e3195/go.mod h1:yedWtra8nyGJ+SyI+ziwuaGMzBatbB10P1IOOZbbSK8=
 github.com/sagernet/websocket v0.0.0-20220913015213-615516348b4e h1:7uw2njHFGE+VpWamge6o56j2RWk4omF6uLKKxMmcWvs=
@@ -188,16 +188,16 @@ go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9i
 go.uber.org/zap v1.21.0/go.mod h1:wjWOCqI0f2ZZrJF/UufIOkiC8ii6tm1iqIsLo76RfJw=
 go.uber.org/zap v1.22.0 h1:Zcye5DUgBloQ9BaT4qc9BnjOFog5TvBSAGkJ3Nf70c0=
 go.uber.org/zap v1.22.0/go.mod h1:H4siCOZOrAolnUPJEkfaSjDqyP+BDS0DdDWzwcgt3+U=
-go4.org/netipx v0.0.0-20220812043211-3cc044ffd68d h1:ggxwEf5eu0l8v+87VhX1czFh8zJul3hK16Gmruxn7hw=
-go4.org/netipx v0.0.0-20220812043211-3cc044ffd68d/go.mod h1:tgPU4N2u9RByaTN3NC2p9xOzyFpte4jYwsIIRF7XlSc=
+go4.org/netipx v0.0.0-20220925034521-797b0c90d8ab h1:+yW1yrZ09EYNu1spCUOHBBNRbrLnfmutwyhbhCv3b6Q=
+go4.org/netipx v0.0.0-20220925034521-797b0c90d8ab/go.mod h1:tgPU4N2u9RByaTN3NC2p9xOzyFpte4jYwsIIRF7XlSc=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190404164418-38d8ce5564a5/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
 golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.0.0-20220829220503-c86fa9a7ed90 h1:Y/gsMcFOcR+6S6f3YeMKl5g+dZMEWqcz5Czj/GWYbkM=
-golang.org/x/crypto v0.0.0-20220829220503-c86fa9a7ed90/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/crypto v0.0.0-20220924013350-4ba4fb4dd9e7 h1:WJywXQVIb56P2kAvXeMGTIgQ1ZHQxR60+F9dLsodECc=
+golang.org/x/crypto v0.0.0-20220924013350-4ba4fb4dd9e7/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e h1:+WEEuIdZHnUeJJmEUjyYC2gfUMj69yZXw17EnHg/otA=
 golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e/go.mod h1:Kr81I6Kryrl9sr8s2FK3vxD90NdsKWRuOIl2O4CvYbA=
@@ -229,8 +229,8 @@ golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/net v0.0.0-20210726213435-c6fcb2dbf985/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211111160137-58aab5ef257a/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220630215102-69896b714898/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.0.0-20220909164309-bea034e7d591 h1:D0B/7al0LLrVC8aWF4+oxpv/m8bc7ViFfVS8/gXGdqI=
-golang.org/x/net v0.0.0-20220909164309-bea034e7d591/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
+golang.org/x/net v0.0.0-20220923203811-8be639271d50 h1:vKyz8L3zkd+xrMeIaBsQ/MNVPVFSffdaU3ZyYlBGFnI=
+golang.org/x/net v0.0.0-20220923203811-8be639271d50/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -264,8 +264,8 @@ golang.org/x/sys v0.0.0-20220412211240-33da011f77ad/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220731174439-a90be440212d/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220913120320-3275c407cedc h1:dpclq5m2YrqPGStKmtw7IcNbKLfbIqKXvNxDJKdIKYc=
-golang.org/x/sys v0.0.0-20220913120320-3275c407cedc/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8 h1:h+EGohizhe9XlX18rfpa8k8RAc5XyaeamM+0VHRd4lc=
+golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
--- a/inbound/default.go
+++ b/inbound/default.go
@@ -141,13 +141,13 @@ func (a *myInboundAdapter) createMetadata(conn net.Conn, metadata adapter.Inboun
 	metadata.SniffOverrideDestination = a.listenOptions.SniffOverrideDestination
 	metadata.DomainStrategy = dns.DomainStrategy(a.listenOptions.DomainStrategy)
 	if !metadata.Source.IsValid() {
-		metadata.Source = M.SocksaddrFromNet(conn.RemoteAddr())
+		metadata.Source = M.SocksaddrFromNet(conn.RemoteAddr()).Unwrap()
 	}
 	if !metadata.Destination.IsValid() {
-		metadata.Destination = M.SocksaddrFromNet(conn.LocalAddr())
+		metadata.Destination = M.SocksaddrFromNet(conn.LocalAddr()).Unwrap()
 	}
 	if tcpConn, isTCP := common.Cast[*net.TCPConn](conn); isTCP {
-		metadata.OriginDestination = M.SocksaddrFromNet(tcpConn.LocalAddr())
+		metadata.OriginDestination = M.SocksaddrFromNet(tcpConn.LocalAddr()).Unwrap()
 	}
 	return metadata
 }
--- a/inbound/default_udp.go
+++ b/inbound/default_udp.go
@@ -54,7 +54,7 @@ func (a *myInboundAdapter) loopUDPIn() {
 		metadata.SniffEnabled = a.listenOptions.SniffEnabled
 		metadata.SniffOverrideDestination = a.listenOptions.SniffOverrideDestination
 		metadata.DomainStrategy = dns.DomainStrategy(a.listenOptions.DomainStrategy)
-		metadata.Source = M.SocksaddrFromNetIP(addr)
+		metadata.Source = M.SocksaddrFromNetIP(addr).Unwrap()
 		metadata.OriginDestination = a.udpAddr
 		err = a.packetHandler.NewPacket(a.ctx, packetService, buffer, metadata)
 		if err != nil {
@@ -86,7 +86,7 @@ func (a *myInboundAdapter) loopUDPOOBIn() {
 		metadata.SniffEnabled = a.listenOptions.SniffEnabled
 		metadata.SniffOverrideDestination = a.listenOptions.SniffOverrideDestination
 		metadata.DomainStrategy = dns.DomainStrategy(a.listenOptions.DomainStrategy)
-		metadata.Source = M.SocksaddrFromNetIP(addr)
+		metadata.Source = M.SocksaddrFromNetIP(addr).Unwrap()
 		metadata.OriginDestination = a.udpAddr
 		err = a.oobPacketHandler.NewPacket(a.ctx, packetService, buffer, oob[:oobN], metadata)
 		if err != nil {
@@ -112,7 +112,7 @@ func (a *myInboundAdapter) loopUDPInThreadSafe() {
 		metadata.SniffEnabled = a.listenOptions.SniffEnabled
 		metadata.SniffOverrideDestination = a.listenOptions.SniffOverrideDestination
 		metadata.DomainStrategy = dns.DomainStrategy(a.listenOptions.DomainStrategy)
-		metadata.Source = M.SocksaddrFromNetIP(addr)
+		metadata.Source = M.SocksaddrFromNetIP(addr).Unwrap()
 		metadata.OriginDestination = a.udpAddr
 		err = a.packetHandler.NewPacket(a.ctx, packetService, buffer, metadata)
 		if err != nil {
@@ -140,7 +140,7 @@ func (a *myInboundAdapter) loopUDPOOBInThreadSafe() {
 		metadata.SniffEnabled = a.listenOptions.SniffEnabled
 		metadata.SniffOverrideDestination = a.listenOptions.SniffOverrideDestination
 		metadata.DomainStrategy = dns.DomainStrategy(a.listenOptions.DomainStrategy)
-		metadata.Source = M.SocksaddrFromNetIP(addr)
+		metadata.Source = M.SocksaddrFromNetIP(addr).Unwrap()
 		metadata.OriginDestination = a.udpAddr
 		err = a.oobPacketHandler.NewPacket(a.ctx, packetService, buffer, oob[:oobN], metadata)
 		if err != nil {
--- a/inbound/hysteria.go
+++ b/inbound/hysteria.go
@@ -261,9 +261,9 @@ func (h *Hysteria) acceptStream(ctx context.Context, conn quic.Connection, strea
 	metadata.SniffEnabled = h.listenOptions.SniffEnabled
 	metadata.SniffOverrideDestination = h.listenOptions.SniffOverrideDestination
 	metadata.DomainStrategy = dns.DomainStrategy(h.listenOptions.DomainStrategy)
-	metadata.Source = M.SocksaddrFromNet(conn.RemoteAddr())
-	metadata.OriginDestination = M.SocksaddrFromNet(conn.LocalAddr())
-	metadata.Destination = M.ParseSocksaddrHostPort(request.Host, request.Port)
+	metadata.Source = M.SocksaddrFromNet(conn.RemoteAddr()).Unwrap()
+	metadata.OriginDestination = M.SocksaddrFromNet(conn.LocalAddr()).Unwrap()
+	metadata.Destination = M.ParseSocksaddrHostPort(request.Host, request.Port).Unwrap()

 	if !request.UDP {
 		err = hysteria.WriteServerResponse(stream, hysteria.ServerResponse{
--- a/inbound/tproxy.go
+++ b/inbound/tproxy.go
@@ -75,7 +75,7 @@ func (t *TProxy) Start() error {
 }

 func (t *TProxy) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
-	metadata.Destination = M.SocksaddrFromNet(conn.LocalAddr())
+	metadata.Destination = M.SocksaddrFromNet(conn.LocalAddr()).Unwrap()
 	return t.newConnection(ctx, conn, metadata)
 }

@@ -84,14 +84,15 @@ func (t *TProxy) NewPacket(ctx context.Context, conn N.PacketConn, buffer *buf.B
 	if err != nil {
 		return E.Cause(err, "get tproxy destination")
 	}
-	metadata.Destination = M.SocksaddrFromNetIP(destination)
+	metadata.Destination = M.SocksaddrFromNetIP(destination).Unwrap()
 	t.udpNat.NewContextPacket(ctx, metadata.Source.AddrPort(), buffer, adapter.UpstreamMetadata(metadata), func(natConn N.PacketConn) (context.Context, N.PacketWriter) {
-		return adapter.WithContext(log.ContextWithNewID(ctx), &metadata), &tproxyPacketWriter{source: natConn}
+		return adapter.WithContext(log.ContextWithNewID(ctx), &metadata), &tproxyPacketWriter{ctx: ctx, source: natConn, destination: metadata.Destination}
 	})
 	return nil
 }

 type tproxyPacketWriter struct {
+	ctx         context.Context
 	source      N.PacketConn
 	destination M.Socksaddr
 	conn        *net.UDPConn
@@ -99,25 +100,27 @@ type tproxyPacketWriter struct {

 func (w *tproxyPacketWriter) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
 	defer buffer.Release()
-	var udpConn *net.UDPConn
+	if w.destination == destination && w.conn != nil {
+		_, err := w.conn.WriteToUDPAddrPort(buffer.Bytes(), M.AddrPortFromNet(w.source.LocalAddr()))
+		if err == nil {
+			w.conn = nil
+		}
+		return err
+	}
+	var listener net.ListenConfig
+	listener.Control = control.Append(listener.Control, control.ReuseAddr())
+	listener.Control = control.Append(listener.Control, redir.TProxyWriteBack())
+	packetConn, err := listener.ListenPacket(w.ctx, "udp", destination.String())
+	if err != nil {
+		return err
+	}
+	udpConn := packetConn.(*net.UDPConn)
 	if w.destination == destination {
-		if w.conn != nil {
-			udpConn = w.conn
-		}
+		w.conn = udpConn
+	} else {
+		defer udpConn.Close()
 	}
-	if udpConn == nil {
-		var err error
-		udpConn, err = redir.DialUDP(destination.UDPAddr(), M.SocksaddrFromNet(w.source.LocalAddr()).UDPAddr())
-		if err != nil {
-			return E.Cause(err, "tproxy udp write back")
-		}
-		if w.destination == destination {
-			w.conn = udpConn
-		} else {
-			defer udpConn.Close()
-		}
-	}
-	return common.Error(udpConn.Write(buffer.Bytes()))
+	return common.Error(udpConn.WriteToUDPAddrPort(buffer.Bytes(), M.AddrPortFromNet(w.source.LocalAddr())))
 }

 func (w *tproxyPacketWriter) Close() error {
--- a/inbound/tun.go
+++ b/inbound/tun.go
@@ -190,7 +190,7 @@ func (t *Tun) NewConnection(ctx context.Context, conn net.Conn, upstreamMetadata
 	if err != nil {
 		t.NewError(ctx, err)
 	}
-	return err
+	return nil
 }

 func (t *Tun) NewPacketConnection(ctx context.Context, conn N.PacketConn, upstreamMetadata M.Metadata) error {
@@ -212,7 +212,7 @@ func (t *Tun) NewPacketConnection(ctx context.Context, conn N.PacketConn, upstre
 	if err != nil {
 		t.NewError(ctx, err)
 	}
-	return err
+	return nil
 }

 func (t *Tun) NewError(ctx context.Context, err error) {
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -90,6 +90,7 @@ nav:
          - SSH: configuration/outbound/ssh.md
          - DNS: configuration/outbound/dns.md
          - Selector: configuration/outbound/selector.md
+          - URLTest: configuration/outbound/urltest.md
  - FAQ:
      - faq/index.md
      - Known Issues: faq/known-issues.md
--- a/option/clash.go
+++ b/option/clash.go
@@ -14,3 +14,10 @@ type SelectorOutboundOptions struct {
 	Outbounds []string `json:"outbounds"`
 	Default   string   `json:"default,omitempty"`
 }
+
+type URLTestOutboundOptions struct {
+	Outbounds []string `json:"outbounds"`
+	URL       string   `json:"url,omitempty"`
+	Interval  Duration `json:"interval,omitempty"`
+	Tolerance uint16   `json:"tolerance,omitempty"`
+}
--- a/option/outbound.go
+++ b/option/outbound.go
@@ -24,6 +24,7 @@ type _Outbound struct {
 	ShadowsocksROptions ShadowsocksROutboundOptions `json:"-"`
 	VLESSOptions        VLESSOutboundOptions        `json:"-"`
 	SelectorOptions     SelectorOutboundOptions     `json:"-"`
+	URLTestOptions      URLTestOutboundOptions      `json:"-"`
 }

 type Outbound _Outbound
@@ -61,6 +62,8 @@ func (h Outbound) MarshalJSON() ([]byte, error) {
 		v = h.VLESSOptions
 	case C.TypeSelector:
 		v = h.SelectorOptions
+	case C.TypeURLTest:
+		v = h.URLTestOptions
 	default:
 		return nil, E.New("unknown outbound type: ", h.Type)
 	}
@@ -104,6 +107,8 @@ func (h *Outbound) UnmarshalJSON(bytes []byte) error {
 		v = &h.VLESSOptions
 	case C.TypeSelector:
 		v = &h.SelectorOptions
+	case C.TypeURLTest:
+		v = &h.URLTestOptions
 	default:
 		return E.New("unknown outbound type: ", h.Type)
 	}
@@ -115,17 +120,18 @@ func (h *Outbound) UnmarshalJSON(bytes []byte) error {
 }

 type DialerOptions struct {
-	Detour         string         `json:"detour,omitempty"`
-	BindInterface  string         `json:"bind_interface,omitempty"`
-	BindAddress    *ListenAddress `json:"bind_address,omitempty"`
-	ProtectPath    string         `json:"protect_path,omitempty"`
-	RoutingMark    int            `json:"routing_mark,omitempty"`
-	ReuseAddr      bool           `json:"reuse_addr,omitempty"`
-	ConnectTimeout Duration       `json:"connect_timeout,omitempty"`
-	TCPFastOpen    bool           `json:"tcp_fast_open,omitempty"`
-	UDPFragment    bool           `json:"udp_fragment,omitempty"`
-	DomainStrategy DomainStrategy `json:"domain_strategy,omitempty"`
-	FallbackDelay  Duration       `json:"fallback_delay,omitempty"`
+	Detour             string         `json:"detour,omitempty"`
+	BindInterface      string         `json:"bind_interface,omitempty"`
+	BindAddress        *ListenAddress `json:"bind_address,omitempty"`
+	ProtectPath        string         `json:"protect_path,omitempty"`
+	RoutingMark        int            `json:"routing_mark,omitempty"`
+	ReuseAddr          bool           `json:"reuse_addr,omitempty"`
+	ConnectTimeout     Duration       `json:"connect_timeout,omitempty"`
+	TCPFastOpen        bool           `json:"tcp_fast_open,omitempty"`
+	UDPFragment        *bool          `json:"udp_fragment,omitempty"`
+	UDPFragmentDefault bool           `json:"-"`
+	DomainStrategy     DomainStrategy `json:"domain_strategy,omitempty"`
+	FallbackDelay      Duration       `json:"fallback_delay,omitempty"`
 }

 type ServerOptions struct {
--- a/option/tls.go
+++ b/option/tls.go
@@ -3,6 +3,7 @@ package option
 type InboundTLSOptions struct {
 	Enabled         bool                `json:"enabled,omitempty"`
 	ServerName      string              `json:"server_name,omitempty"`
+	Insecure        bool                `json:"insecure,omitempty"`
 	ALPN            Listable[string]    `json:"alpn,omitempty"`
 	MinVersion      string              `json:"min_version,omitempty"`
 	MaxVersion      string              `json:"max_version,omitempty"`
--- a/option/vmess.go
+++ b/option/vmess.go
@@ -23,7 +23,7 @@ type VMessOutboundOptions struct {
 	AuthenticatedLength bool                   `json:"authenticated_length,omitempty"`
 	Network             NetworkList            `json:"network,omitempty"`
 	TLS                 *OutboundTLSOptions    `json:"tls,omitempty"`
-	PacketAddr          bool                   `json:"packet_addr,omitempty"`
+	PacketEncoding      string                 `json:"packet_encoding,omitempty"`
 	Multiplex           *MultiplexOptions      `json:"multiplex,omitempty"`
 	Transport           *V2RayTransportOptions `json:"transport,omitempty"`
 }
--- a/outbound/builder.go
+++ b/outbound/builder.go
@@ -47,6 +47,8 @@ func New(ctx context.Context, router adapter.Router, logger log.ContextLogger, o
 		return NewVLESS(ctx, router, logger, options.Tag, options.VLESSOptions)
 	case C.TypeSelector:
 		return NewSelector(router, logger, options.Tag, options.SelectorOptions)
+	case C.TypeURLTest:
+		return NewURLTest(router, logger, options.Tag, options.URLTestOptions)
 	default:
 		return nil, E.New("unknown outbound type: ", options.Type)
 	}
--- a/outbound/direct.go
+++ b/outbound/direct.go
@@ -35,6 +35,7 @@ type Direct struct {
 }

 func NewDirect(router adapter.Router, logger log.ContextLogger, tag string, options option.DirectOutboundOptions) (*Direct, error) {
+	options.UDPFragmentDefault = true
 	outbound := &Direct{
 		myOutboundAdapter: myOutboundAdapter{
 			protocol: C.TypeDirect,
--- a/outbound/hysteria.go
+++ b/outbound/hysteria.go
@@ -38,6 +38,7 @@ type Hysteria struct {
 	recvBPS      uint64
 	connAccess   sync.Mutex
 	conn         quic.Connection
+	rawConn      net.Conn
 	udpAccess    sync.RWMutex
 	udpSessions  map[uint32]chan *hysteria.UDPMessage
 	udpDefragger hysteria.Defragger
@@ -149,7 +150,6 @@ func (h *Hysteria) offer(ctx context.Context) (quic.Connection, error) {
 	if err != nil {
 		return nil, err
 	}
-	h.conn = conn
 	if common.Contains(h.network, N.NetworkUDP) {
 		for _, session := range h.udpSessions {
 			close(session)
@@ -201,6 +201,8 @@ func (h *Hysteria) offerNew(ctx context.Context) (quic.Connection, error) {
 		return nil, E.New("remote error: ", serverHello.Message)
 	}
 	quicConn.SetCongestionControl(hysteria.NewBrutalSender(congestion.ByteCount(serverHello.RecvBPS)))
+	h.conn = quicConn
+	h.rawConn = udpConn
 	return quicConn, nil
 }

@@ -240,6 +242,7 @@ func (h *Hysteria) Close() error {
 	defer h.udpAccess.Unlock()
 	if h.conn != nil {
 		h.conn.CloseWithError(0, "")
+		h.rawConn.Close()
 	}
 	for _, session := range h.udpSessions {
 		close(session)
--- a/outbound/socks.go
+++ b/outbound/socks.go
@@ -74,7 +74,7 @@ func (h *Socks) DialContext(ctx context.Context, network string, destination M.S
 	default:
 		return nil, E.Extend(N.ErrUnknownNetwork, network)
 	}
-	if destination.IsFqdn() {
+	if h.resolve && destination.IsFqdn() {
 		addrs, err := h.router.LookupDefault(ctx, destination.Fqdn)
 		if err != nil {
 			return nil, err
--- a/outbound/trojan.go
+++ b/outbound/trojan.go
@@ -103,6 +103,10 @@ func (h *Trojan) NewPacketConnection(ctx context.Context, conn N.PacketConn, met
 	return NewPacketConnection(ctx, h, conn, metadata)
 }

+func (h *Trojan) Close() error {
+	return common.Close(h.multiplexDialer, h.transport)
+}
+
 type trojanDialer Trojan

 func (h *trojanDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
--- a/outbound/urltest.go
+++ b/outbound/urltest.go
@@ -0,0 +1,287 @@
+package outbound
+
+import (
+	"context"
+	"net"
+	"sort"
+	"time"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/common/urltest"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/batch"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+)
+
+var (
+	_ adapter.Outbound      = (*URLTest)(nil)
+	_ adapter.OutboundGroup = (*URLTest)(nil)
+)
+
+type URLTest struct {
+	myOutboundAdapter
+	tags      []string
+	link      string
+	interval  time.Duration
+	tolerance uint16
+	group     *URLTestGroup
+}
+
+func NewURLTest(router adapter.Router, logger log.ContextLogger, tag string, options option.URLTestOutboundOptions) (*URLTest, error) {
+	outbound := &URLTest{
+		myOutboundAdapter: myOutboundAdapter{
+			protocol: C.TypeURLTest,
+			router:   router,
+			logger:   logger,
+			tag:      tag,
+		},
+		tags:      options.Outbounds,
+		link:      options.URL,
+		interval:  time.Duration(options.Interval),
+		tolerance: options.Tolerance,
+	}
+	if len(outbound.tags) == 0 {
+		return nil, E.New("missing tags")
+	}
+	return outbound, nil
+}
+
+func (s *URLTest) Network() []string {
+	if s.group == nil {
+		return []string{N.NetworkTCP, N.NetworkUDP}
+	}
+	return s.group.Select(N.NetworkTCP).Network()
+}
+
+func (s *URLTest) Start() error {
+	outbounds := make([]adapter.Outbound, 0, len(s.tags))
+	for i, tag := range s.tags {
+		detour, loaded := s.router.Outbound(tag)
+		if !loaded {
+			return E.New("outbound ", i, " not found: ", tag)
+		}
+		outbounds = append(outbounds, detour)
+	}
+	s.group = NewURLTestGroup(s.router, s.logger, outbounds, s.link, s.interval, s.tolerance)
+	return s.group.Start()
+}
+
+func (s URLTest) Close() error {
+	return common.Close(
+		common.PtrOrNil(s.group),
+	)
+}
+
+func (s *URLTest) Now() string {
+	return s.group.Select(N.NetworkTCP).Tag()
+}
+
+func (s *URLTest) All() []string {
+	return s.tags
+}
+
+func (s *URLTest) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	outbound := s.group.Select(network)
+	conn, err := outbound.DialContext(ctx, network, destination)
+	if err == nil {
+		return conn, nil
+	}
+	s.logger.ErrorContext(ctx, err)
+	go s.group.checkOutbounds()
+	outbounds := s.group.Fallback(outbound)
+	for _, fallback := range outbounds {
+		conn, err = fallback.DialContext(ctx, network, destination)
+		if err == nil {
+			return conn, nil
+		}
+	}
+	return nil, err
+}
+
+func (s *URLTest) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	outbound := s.group.Select(N.NetworkUDP)
+	conn, err := outbound.ListenPacket(ctx, destination)
+	if err == nil {
+		return conn, nil
+	}
+	s.logger.ErrorContext(ctx, err)
+	go s.group.checkOutbounds()
+	outbounds := s.group.Fallback(outbound)
+	for _, fallback := range outbounds {
+		conn, err = fallback.ListenPacket(ctx, destination)
+		if err == nil {
+			return conn, nil
+		}
+	}
+	return nil, err
+}
+
+func (s *URLTest) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
+	return NewConnection(ctx, s, conn, metadata)
+}
+
+func (s *URLTest) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
+	return NewPacketConnection(ctx, s, conn, metadata)
+}
+
+type URLTestGroup struct {
+	router    adapter.Router
+	logger    log.Logger
+	outbounds []adapter.Outbound
+	link      string
+	interval  time.Duration
+	tolerance uint16
+	history   *urltest.HistoryStorage
+
+	ticker *time.Ticker
+	close  chan struct{}
+}
+
+func NewURLTestGroup(router adapter.Router, logger log.Logger, outbounds []adapter.Outbound, link string, interval time.Duration, tolerance uint16) *URLTestGroup {
+	if link == "" {
+		//goland:noinspection HttpUrlsUsage
+		link = "http://www.gstatic.com/generate_204"
+	}
+	if interval == 0 {
+		interval = C.DefaultURLTestInterval
+	}
+	if tolerance == 0 {
+		tolerance = 50
+	}
+	var history *urltest.HistoryStorage
+	if clashServer := router.ClashServer(); clashServer != nil {
+		history = clashServer.HistoryStorage()
+	} else {
+		history = urltest.NewHistoryStorage()
+	}
+	return &URLTestGroup{
+		router:    router,
+		logger:    logger,
+		outbounds: outbounds,
+		link:      link,
+		interval:  interval,
+		tolerance: tolerance,
+		history:   history,
+		close:     make(chan struct{}),
+	}
+}
+
+func (g *URLTestGroup) Start() error {
+	g.ticker = time.NewTicker(g.interval)
+	go g.loopCheck()
+	return nil
+}
+
+func (g *URLTestGroup) Close() error {
+	g.ticker.Stop()
+	close(g.close)
+	return nil
+}
+
+func (g *URLTestGroup) Select(network string) adapter.Outbound {
+	var minDelay uint16
+	var minTime time.Time
+	var minOutbound adapter.Outbound
+	for _, detour := range g.outbounds {
+		if !common.Contains(detour.Network(), network) {
+			continue
+		}
+		history := g.history.LoadURLTestHistory(RealTag(detour))
+		if history == nil {
+			continue
+		}
+		if minDelay == 0 || minDelay > history.Delay+g.tolerance || minDelay > history.Delay-g.tolerance && minTime.Before(history.Time) {
+			minDelay = history.Delay
+			minTime = history.Time
+			minOutbound = detour
+		}
+	}
+	if minOutbound == nil {
+		for _, detour := range g.outbounds {
+			if !common.Contains(detour.Network(), network) {
+				continue
+			}
+			minOutbound = detour
+			break
+		}
+	}
+	return minOutbound
+}
+
+func (g *URLTestGroup) Fallback(used adapter.Outbound) []adapter.Outbound {
+	outbounds := make([]adapter.Outbound, 0, len(g.outbounds)-1)
+	for _, detour := range g.outbounds {
+		if detour != used {
+			outbounds = append(outbounds, detour)
+		}
+	}
+	sort.Slice(outbounds, func(i, j int) bool {
+		oi := outbounds[i]
+		oj := outbounds[j]
+		hi := g.history.LoadURLTestHistory(RealTag(oi))
+		if hi == nil {
+			return false
+		}
+		hj := g.history.LoadURLTestHistory(RealTag(oj))
+		if hj == nil {
+			return false
+		}
+		return hi.Delay < hj.Delay
+	})
+	return outbounds
+}
+
+func (g *URLTestGroup) loopCheck() {
+	go g.checkOutbounds()
+	for {
+		select {
+		case <-g.close:
+			return
+		case <-g.ticker.C:
+			g.checkOutbounds()
+		}
+	}
+}
+
+func (g *URLTestGroup) checkOutbounds() {
+	b, _ := batch.New(context.Background(), batch.WithConcurrencyNum[any](10))
+	checked := make(map[string]bool)
+	for _, detour := range g.outbounds {
+		tag := detour.Tag()
+		realTag := RealTag(detour)
+		if checked[realTag] {
+			continue
+		}
+		history := g.history.LoadURLTestHistory(realTag)
+		if history != nil && time.Now().Sub(history.Time) < g.interval {
+			continue
+		}
+		checked[realTag] = true
+		p, loaded := g.router.Outbound(realTag)
+		if !loaded {
+			continue
+		}
+		b.Go(realTag, func() (any, error) {
+			ctx, cancel := context.WithTimeout(context.Background(), C.TCPTimeout)
+			defer cancel()
+			t, err := urltest.URLTest(ctx, g.link, p)
+			if err != nil {
+				g.logger.Debug("outbound ", tag, " unavailable: ", err)
+				g.history.DeleteURLTestHistory(realTag)
+			} else {
+				g.logger.Debug("outbound ", tag, " available: ", t, "ms")
+				g.history.StoreURLTestHistory(realTag, &urltest.History{
+					Time:  time.Now(),
+					Delay: t,
+				})
+			}
+			return nil, nil
+		})
+	}
+	b.Wait()
+}
--- a/outbound/vless.go
+++ b/outbound/vless.go
@@ -11,8 +11,9 @@ import (
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-box/transport/v2ray"
-	"github.com/sagernet/sing-box/transport/vless"
+	"github.com/sagernet/sing-dns"
 	"github.com/sagernet/sing-vmess/packetaddr"
+	"github.com/sagernet/sing-vmess/vless"
 	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
@@ -73,10 +74,6 @@ func NewVLESS(ctx context.Context, router adapter.Router, logger log.ContextLogg
 	return outbound, nil
 }

-func (h *VLESS) Close() error {
-	return common.Close(h.transport)
-}
-
 func (h *VLESS) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
 	ctx, metadata := adapter.AppendContext(ctx)
 	metadata.Outbound = h.tag
@@ -104,7 +101,7 @@ func (h *VLESS) DialContext(ctx context.Context, network string, destination M.S
 		return h.client.DialEarlyConn(conn, destination), nil
 	case N.NetworkUDP:
 		h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
-		return h.client.DialPacketConn(conn, destination), nil
+		return h.client.DialEarlyPacketConn(conn, destination), nil
 	default:
 		return nil, E.Extend(N.ErrUnknownNetwork, network)
 	}
@@ -129,11 +126,11 @@ func (h *VLESS) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.
 		return nil, err
 	}
 	if h.xudp {
-		return h.client.DialXUDPPacketConn(conn, destination), nil
+		return h.client.DialEarlyXUDPPacketConn(conn, destination), nil
 	} else if h.packetAddr {
-		return packetaddr.NewConn(h.client.DialPacketConn(conn, M.Socksaddr{Fqdn: packetaddr.SeqPacketMagicAddress}), destination), nil
+		return dialer.NewResolvePacketConn(ctx, h.router, dns.DomainStrategyAsIS, packetaddr.NewConn(h.client.DialEarlyPacketConn(conn, M.Socksaddr{Fqdn: packetaddr.SeqPacketMagicAddress}), destination)), nil
 	} else {
-		return h.client.DialPacketConn(conn, destination), nil
+		return h.client.DialEarlyPacketConn(conn, destination), nil
 	}
 }

@@ -144,3 +141,7 @@ func (h *VLESS) NewConnection(ctx context.Context, conn net.Conn, metadata adapt
 func (h *VLESS) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
 	return NewPacketConnection(ctx, h, conn, metadata)
 }
+
+func (h *VLESS) Close() error {
+	return common.Close(h.transport)
+}
--- a/outbound/vmess.go
+++ b/outbound/vmess.go
@@ -12,6 +12,7 @@ import (
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-box/transport/v2ray"
+	"github.com/sagernet/sing-dns"
 	"github.com/sagernet/sing-vmess"
 	"github.com/sagernet/sing-vmess/packetaddr"
 	"github.com/sagernet/sing/common"
@@ -31,6 +32,7 @@ type VMess struct {
 	tlsConfig       tls.Config
 	transport       adapter.V2RayClientTransport
 	packetAddr      bool
+	xudp            bool
 }

 func NewVMess(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.VMessOutboundOptions) (*VMess, error) {
@@ -62,8 +64,14 @@ func NewVMess(ctx context.Context, router adapter.Router, logger log.ContextLogg
 	if err != nil {
 		return nil, err
 	}
-	if outbound.multiplexDialer == nil && options.PacketAddr {
+	switch options.PacketEncoding {
+	case "":
+	case "packetaddr":
 		outbound.packetAddr = true
+	case "xudp":
+		outbound.xudp = true
+	default:
+		return nil, E.New("unknown packet encoding: ", options.PacketEncoding)
 	}
 	var clientOptions []vmess.ClientOption
 	if options.GlobalPadding {
@@ -88,7 +96,7 @@ func NewVMess(ctx context.Context, router adapter.Router, logger log.ContextLogg
 }

 func (h *VMess) Close() error {
-	return common.Close(h.transport)
+	return common.Close(h.multiplexDialer, h.transport)
 }

 func (h *VMess) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
@@ -176,7 +184,9 @@ func (h *vmessDialer) ListenPacket(ctx context.Context, destination M.Socksaddr)
 		return nil, err
 	}
 	if h.packetAddr {
-		return packetaddr.NewConn(h.client.DialEarlyPacketConn(conn, M.Socksaddr{Fqdn: packetaddr.SeqPacketMagicAddress}), destination), nil
+		return dialer.NewResolvePacketConn(ctx, h.router, dns.DomainStrategyAsIS, packetaddr.NewConn(h.client.DialEarlyPacketConn(conn, M.Socksaddr{Fqdn: packetaddr.SeqPacketMagicAddress}), destination)), nil
+	} else if h.xudp {
+		return h.client.DialEarlyXUDPPacketConn(conn, destination), nil
 	} else {
 		return h.client.DialEarlyPacketConn(conn, destination), nil
 	}
--- a/outbound/wireguard.go
+++ b/outbound/wireguard.go
@@ -162,9 +162,8 @@ func (w *WireGuard) Start() error {
 }

 func (w *WireGuard) Close() error {
-	return common.Close(
-		w.tunDevice,
-		common.PtrOrNil(w.device),
-		common.PtrOrNil(w.bind),
-	)
+	if w.device != nil {
+		w.device.Close()
+	}
+	return common.Close(w.tunDevice)
 }
--- a/route/router.go
+++ b/route/router.go
@@ -554,7 +554,7 @@ func (r *Router) RouteConnection(ctx context.Context, conn net.Conn, metadata ad
 		if err == nil {
 			metadata.Protocol = sniffMetadata.Protocol
 			metadata.Domain = sniffMetadata.Domain
-			if metadata.SniffOverrideDestination && sniff.IsDomainName(metadata.Domain) {
+			if metadata.SniffOverrideDestination && M.IsDomainName(metadata.Domain) {
 				metadata.Destination = M.Socksaddr{
 					Fqdn: metadata.Domain,
 					Port: metadata.Destination.Port,
@@ -631,7 +631,7 @@ func (r *Router) RoutePacketConnection(ctx context.Context, conn N.PacketConn, m
 		if err == nil {
 			metadata.Protocol = sniffMetadata.Protocol
 			metadata.Domain = sniffMetadata.Domain
-			if metadata.SniffOverrideDestination && sniff.IsDomainName(metadata.Domain) {
+			if metadata.SniffOverrideDestination && M.IsDomainName(metadata.Domain) {
 				metadata.Destination = M.Socksaddr{
 					Fqdn: metadata.Domain,
 					Port: metadata.Destination.Port,
--- a/route/rule_cidr.go
+++ b/route/rule_cidr.go
@@ -59,13 +59,13 @@ func NewIPCIDRItem(isSource bool, prefixStrings []string) (*IPCIDRItem, error) {

 func (r *IPCIDRItem) Match(metadata *adapter.InboundContext) bool {
 	if r.isSource {
-		return r.match(metadata.Source.Addr)
+		return r.ipSet.Contains(metadata.Source.Addr)
 	} else {
 		if metadata.Destination.IsIP() {
-			return r.match(metadata.Destination.Addr)
+			return r.ipSet.Contains(metadata.Destination.Addr)
 		} else {
 			for _, address := range metadata.DestinationAddresses {
-				if r.match(address) {
+				if r.ipSet.Contains(address) {
 					return true
 				}
 			}
@@ -74,14 +74,6 @@ func (r *IPCIDRItem) Match(metadata *adapter.InboundContext) bool {
 	return false
 }

-func (r *IPCIDRItem) match(address netip.Addr) bool {
-	if address.Is4In6() {
-		return r.ipSet.Contains(netip.AddrFrom4(address.As4()))
-	} else {
-		return r.ipSet.Contains(address)
-	}
-}
-
 func (r *IPCIDRItem) String() string {
 	return r.description
 }
--- a/test/box_test.go
+++ b/test/box_test.go
@@ -15,9 +15,14 @@ import (
 	"github.com/sagernet/sing/protocol/socks"

 	"github.com/stretchr/testify/require"
+	"go.uber.org/goleak"
 )

-func startInstance(t *testing.T, options option.Options) {
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m)
+}
+
+func startInstance(t *testing.T, options option.Options) *box.Box {
 	if debug.Enabled {
 		options.Log = &option.LogOptions{
 			Level: "trace",
@@ -27,10 +32,12 @@ func startInstance(t *testing.T, options option.Options) {
 			Level: "warning",
 		}
 	}
+	// ctx := context.Background()
+	ctx, cancel := context.WithCancel(context.Background())
 	var instance *box.Box
 	var err error
 	for retry := 0; retry < 3; retry++ {
-		instance, err = box.New(context.Background(), options)
+		instance, err = box.New(ctx, options)
 		require.NoError(t, err)
 		err = instance.Start()
 		if err != nil {
@@ -42,7 +49,9 @@ func startInstance(t *testing.T, options option.Options) {
 	require.NoError(t, err)
 	t.Cleanup(func() {
 		instance.Close()
+		cancel()
 	})
+	return instance
 }

 func testSuit(t *testing.T, clientPort uint16, testPort uint16) {
--- a/test/clash_test.go
+++ b/test/clash_test.go
@@ -7,7 +7,6 @@ import (
 	"errors"
 	"io"
 	"net"
-	"net/http"
 	_ "net/http/pprof"
 	"net/netip"
 	"sync"
@@ -39,6 +38,7 @@ const (
 	ImageShadowTLS             = "ghcr.io/ihciah/shadow-tls:latest"
 	ImageShadowsocksR          = "teddysun/shadowsocks-r:latest"
 	ImageXRayCore              = "teddysun/xray:latest"
+	ImageShadowsocksLegacy     = "mritd/shadowsocks:latest"
 )

 var allImages = []string{
@@ -53,6 +53,7 @@ var allImages = []string{
 	ImageShadowTLS,
 	ImageShadowsocksR,
 	ImageXRayCore,
+	ImageShadowsocksLegacy,
 }

 var localIP = netip.MustParseAddr("127.0.0.1")
@@ -101,12 +102,6 @@ func init() {

 		io.Copy(io.Discard, imageStream)
 	}
-	go func() {
-		err = http.ListenAndServe("0.0.0.0:8965", nil)
-		if err != nil {
-			log.Debug(err)
-		}
-	}()
 }

 func newPingPongPair() (chan []byte, chan []byte, func(t *testing.T) error) {
--- a/test/config/vmess-mux-client.json
+++ b/test/config/vmess-mux-client.json
@@ -0,0 +1,41 @@
+{
+  "log": {
+    "loglevel": "debug"
+  },
+  "inbounds": [
+    {
+      "listen": "127.0.0.1",
+      "port": "1080",
+      "protocol": "socks",
+      "settings": {
+        "auth": "noauth",
+        "udp": true,
+        "ip": "127.0.0.1"
+      }
+    }
+  ],
+  "outbounds": [
+    {
+      "protocol": "vmess",
+      "settings": {
+        "vnext": [
+          {
+            "address": "127.0.0.1",
+            "port": 1234,
+            "users": [
+              {
+                "id": "",
+                "alterId": 0,
+                "security": "none",
+                "experiments": ""
+              }
+            ]
+          }
+        ]
+      },
+      "mux": {
+        "enabled": true
+      }
+    }
+  ]
+}
--- a/test/go.mod
+++ b/test/go.mod
@@ -10,10 +10,11 @@ require (
 	github.com/docker/docker v20.10.18+incompatible
 	github.com/docker/go-connections v0.4.0
 	github.com/gofrs/uuid v4.3.0+incompatible
-	github.com/sagernet/sing v0.0.0-20220914045234-93cc53b60cee
+	github.com/sagernet/sing v0.0.0-20220921101604-86d7d510231f
 	github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6
 	github.com/spyzhov/ajson v0.7.1
 	github.com/stretchr/testify v1.8.0
+	go.uber.org/goleak v1.2.0
 	golang.org/x/net v0.0.0-20220909164309-bea034e7d591
 )

@@ -21,6 +22,7 @@ require (

 require (
 	berty.tech/go-libtor v1.0.385 // indirect
+	github.com/Dreamacro/clash v1.11.8 // indirect
 	github.com/Microsoft/go-winio v0.5.1 // indirect
 	github.com/ajg/form v1.5.1 // indirect
 	github.com/andybalholm/brotli v1.0.4 // indirect
@@ -65,20 +67,19 @@ require (
 	github.com/sagernet/go-tun2socks v1.16.12-0.20220818015926-16cb67876a61 // indirect
 	github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97 // indirect
 	github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb // indirect
-	github.com/sagernet/shadowsocksr v0.0.0-20220912092645-c9ab93f81bb0 // indirect
-	github.com/sagernet/sing-dns v0.0.0-20220913115644-aebff1dfbba8 // indirect
-	github.com/sagernet/sing-tun v0.0.0-20220914100102-057dd738a7f7 // indirect
-	github.com/sagernet/sing-vmess v0.0.0-20220913015714-c4ab86d40e12 // indirect
+	github.com/sagernet/sing-dns v0.0.0-20220915084601-812e0864b45b // indirect
+	github.com/sagernet/sing-tun v0.0.0-20220922083325-80ee99472704 // indirect
+	github.com/sagernet/sing-vmess v0.0.0-20220923035311-d70afe4ab2c9 // indirect
 	github.com/sagernet/smux v0.0.0-20220831015742-e0f1988e3195 // indirect
 	github.com/sagernet/websocket v0.0.0-20220913015213-615516348b4e // indirect
-	github.com/sirupsen/logrus v1.8.1 // indirect
+	github.com/sirupsen/logrus v1.9.0 // indirect
 	github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74 // indirect
 	go.etcd.io/bbolt v1.3.6 // indirect
 	go.uber.org/atomic v1.10.0 // indirect
 	go.uber.org/multierr v1.6.0 // indirect
 	go.uber.org/zap v1.22.0 // indirect
 	go4.org/netipx v0.0.0-20220812043211-3cc044ffd68d // indirect
-	golang.org/x/crypto v0.0.0-20220829220503-c86fa9a7ed90 // indirect
+	golang.org/x/crypto v0.0.0-20220919173607-35f4265a4bc0 // indirect
 	golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e // indirect
 	golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect
 	golang.org/x/sys v0.0.0-20220913120320-3275c407cedc // indirect
@@ -86,7 +87,7 @@ require (
 	golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect
 	golang.org/x/tools v0.1.11-0.20220513221640-090b14e8501f // indirect
 	golang.zx2c4.com/wintun v0.0.0-20211104114900-415007cec224 // indirect
-	golang.zx2c4.com/wireguard v0.0.0-20220904105730-b51010ba13f0 // indirect
+	golang.zx2c4.com/wireguard v0.0.0-20220829161405-d1d08426b27b // indirect
 	google.golang.org/genproto v0.0.0-20210722135532-667f2b7c528f // indirect
 	google.golang.org/grpc v1.49.0 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
--- a/test/go.sum
+++ b/test/go.sum
@@ -5,6 +5,8 @@ cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8=
 github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Dreamacro/clash v1.11.8 h1:t/sy3/tiihRlvV3SsliYFjj8rKpbLw5IJ2PymiHcwS8=
+github.com/Dreamacro/clash v1.11.8/go.mod h1:LsWCcJFoKuL1C5F2c0m/1690wihTHYSU3J+im09yTwQ=
 github.com/Microsoft/go-winio v0.5.1 h1:aPJp2QD7OOrhO5tQXqQoGSJc+DjDtWTGLOmNyAm6FgY=
 github.com/Microsoft/go-winio v0.5.1/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
 github.com/ajg/form v1.5.1 h1:t9c7v8JUKu/XxOGBU0yjNpaMloxGEJhUkqFRq0ibGeU=
@@ -105,8 +107,8 @@ github.com/klauspost/cpuid/v2 v2.1.0/go.mod h1:RVVoqg1df56z8g3pUjL/3lE5UfnlrJX8t
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/libdns/libdns v0.2.1 h1:Wu59T7wSHRgtA0cfxC+n1c/e+O3upJGWytknkmFEDis=
 github.com/libdns/libdns v0.2.1/go.mod h1:yQCXzk1lEZmmCPa857bnk4TsOiqYasqpyOEeSObbb40=
 github.com/logrusorgru/aurora v2.0.3+incompatible h1:tOpm7WcpBTn4fjmVfgpQq0EfczGlG91VSDkswnjF5A8=
@@ -161,27 +163,25 @@ github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97 h1:iL5gZI3uFp0X6E
 github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97/go.mod h1:xLnfdiJbSp8rNqYEdIW/6eDO4mVoogml14Bh2hSiFpM=
 github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb h1:wc0yQ+SBn4TaTYRwpwvEm3nc4eRdxk6vtRbouLVZAzk=
 github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb/go.mod h1:MIccjRKnPTjWwAOpl+AUGWOkzyTd9tERytudxu+1ra4=
-github.com/sagernet/shadowsocksr v0.0.0-20220912092645-c9ab93f81bb0 h1:lQ4RFWY/wBYmXl/zJJCwQbhiEIbgEqC7j+nhZYkgwmU=
-github.com/sagernet/shadowsocksr v0.0.0-20220912092645-c9ab93f81bb0/go.mod h1:xSHLCsdgy5QIozXFEv6uDgMWzyrRdFFjr3TgL+juu6g=
 github.com/sagernet/sing v0.0.0-20220812082120-05f9836bff8f/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
 github.com/sagernet/sing v0.0.0-20220817130738-ce854cda8522/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
-github.com/sagernet/sing v0.0.0-20220914045234-93cc53b60cee h1:+3w7+QWnhWi3Qz7+Xcais8zViHRUPIkmxq3eYZm/zvk=
-github.com/sagernet/sing v0.0.0-20220914045234-93cc53b60cee/go.mod h1:x3NHUeJBQwV75L51zwmLKQdLtRvR+M4PmXkfQtU1vIY=
-github.com/sagernet/sing-dns v0.0.0-20220913115644-aebff1dfbba8 h1:Iyfl+Rm5jcDvXuy/jpOBI3eu35ujci50tkqYHHwwg+8=
-github.com/sagernet/sing-dns v0.0.0-20220913115644-aebff1dfbba8/go.mod h1:bPVnJ5gJ0WmUfN1bJP9Cis0ab8SSByx6JVzyLJjDMwA=
+github.com/sagernet/sing v0.0.0-20220921101604-86d7d510231f h1:GX416thAwyc0vHBOal/qplvdhFgYO2dHD5GqADCJ0Ig=
+github.com/sagernet/sing v0.0.0-20220921101604-86d7d510231f/go.mod h1:x3NHUeJBQwV75L51zwmLKQdLtRvR+M4PmXkfQtU1vIY=
+github.com/sagernet/sing-dns v0.0.0-20220915084601-812e0864b45b h1:cXCMNJ9heZ+c6l+qUcku60x9KyXo4SOAaJfg/6spOmU=
+github.com/sagernet/sing-dns v0.0.0-20220915084601-812e0864b45b/go.mod h1:SrvWLfOSlnFmH32CWXicfilAGgIXR0VjrH6yRbuXYww=
 github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6 h1:JJfDeYYhWunvtxsU/mOVNTmFQmnzGx9dY034qG6G3g4=
 github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6/go.mod h1:EX3RbZvrwAkPI2nuGa78T2iQXmrkT+/VQtskjou42xM=
-github.com/sagernet/sing-tun v0.0.0-20220914100102-057dd738a7f7 h1:zdvFDYMz8s0e9UmOxMk0wNGOKh64KfeWpx8UAbJJI60=
-github.com/sagernet/sing-tun v0.0.0-20220914100102-057dd738a7f7/go.mod h1:5AhPUv9jWDQ3pv3Mj78SL/1TSjhoaj6WNASxRKLqXqM=
-github.com/sagernet/sing-vmess v0.0.0-20220913015714-c4ab86d40e12 h1:4HYGbTDDemgBVTmaspXbkgjJlXc3hYVjNxSddJndq8Y=
-github.com/sagernet/sing-vmess v0.0.0-20220913015714-c4ab86d40e12/go.mod h1:u66Vv7NHXJWfeAmhh7JuJp/cwxmuQlM56QoZ7B7Mmd0=
+github.com/sagernet/sing-tun v0.0.0-20220922083325-80ee99472704 h1:DOQQXQbB2gq4n2FuMHrL07HRs2naCCsuiu/9l1JFb9A=
+github.com/sagernet/sing-tun v0.0.0-20220922083325-80ee99472704/go.mod h1:5AhPUv9jWDQ3pv3Mj78SL/1TSjhoaj6WNASxRKLqXqM=
+github.com/sagernet/sing-vmess v0.0.0-20220923035311-d70afe4ab2c9 h1:w7JlEa4xHXuuPTL3Opb+Z5f/l66SYi54rSfobzuxSF8=
+github.com/sagernet/sing-vmess v0.0.0-20220923035311-d70afe4ab2c9/go.mod h1:bwhAdSNET1X+j9DOXGj9NIQR39xgcWIk1rOQ9lLD+gM=
 github.com/sagernet/smux v0.0.0-20220831015742-e0f1988e3195 h1:5VBIbVw9q7aKbrFdT83mjkyvQ+VaRsQ6yflTepfln38=
 github.com/sagernet/smux v0.0.0-20220831015742-e0f1988e3195/go.mod h1:yedWtra8nyGJ+SyI+ziwuaGMzBatbB10P1IOOZbbSK8=
 github.com/sagernet/websocket v0.0.0-20220913015213-615516348b4e h1:7uw2njHFGE+VpWamge6o56j2RWk4omF6uLKKxMmcWvs=
 github.com/sagernet/websocket v0.0.0-20220913015213-615516348b4e/go.mod h1:45TUl8+gH4SIKr4ykREbxKWTxkDlSzFENzctB1dVRRY=
 github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
-github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
-github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/sirupsen/logrus v1.9.0 h1:trlNQbNUG3OdDrDil03MCb1H2o9nJ1x4/5LYw7byDE0=
+github.com/sirupsen/logrus v1.9.0/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/spyzhov/ajson v0.7.1 h1:1MDIlPc6x0zjNtpa7tDzRAyFAvRX+X8ZsvtYz5lZg6A=
 github.com/spyzhov/ajson v0.7.1/go.mod h1:63V+CGM6f1Bu/p4nLIN8885ojBdt88TbLoSFzyqMuVA=
@@ -205,8 +205,9 @@ go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqe
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/atomic v1.10.0 h1:9qC72Qh0+3MqyJbAn8YU5xVq1frD8bn3JtD2oXtafVQ=
 go.uber.org/atomic v1.10.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
-go.uber.org/goleak v1.1.11 h1:wy28qYRKZgnJTxGxvye5/wgWr1EKjmUDGYox5mGlRlI=
 go.uber.org/goleak v1.1.11/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
+go.uber.org/goleak v1.2.0 h1:xqgm/S+aQvhWFTtR0XK3Jvg7z8kGV8P4X14IzwN3Eqk=
+go.uber.org/goleak v1.2.0/go.mod h1:XJYK+MuIchqpmGmUSAzotztawfKvYLUIgg7guXrwVUo=
 go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
 go.uber.org/zap v1.21.0/go.mod h1:wjWOCqI0f2ZZrJF/UufIOkiC8ii6tm1iqIsLo76RfJw=
@@ -218,11 +219,10 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20190404164418-38d8ce5564a5/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.0.0-20201203163018-be400aefbc4c/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
 golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
 golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.0.0-20220829220503-c86fa9a7ed90 h1:Y/gsMcFOcR+6S6f3YeMKl5g+dZMEWqcz5Czj/GWYbkM=
-golang.org/x/crypto v0.0.0-20220829220503-c86fa9a7ed90/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/crypto v0.0.0-20220919173607-35f4265a4bc0 h1:a5Yg6ylndHHYJqIPrdq0AhvR6KTvDTAvgBtaidhEevY=
+golang.org/x/crypto v0.0.0-20220919173607-35f4265a4bc0/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e h1:+WEEuIdZHnUeJJmEUjyYC2gfUMj69yZXw17EnHg/otA=
 golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e/go.mod h1:Kr81I6Kryrl9sr8s2FK3vxD90NdsKWRuOIl2O4CvYbA=
@@ -230,6 +230,7 @@ golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTk
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/lint v0.0.0-20210508222113-6edffad5e616 h1:VLliZ0d+/avPrXXH+OakdXhpJuEoBZuwh1m2j7U6Iug=
 golang.org/x/lint v0.0.0-20210508222113-6edffad5e616/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
@@ -266,8 +267,8 @@ golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220819030929-7fc1605a5dde h1:ejfdSekXMDxDLbRrJMwUk6KnSLZ2McaUCVcIKM+N6jc=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -295,10 +296,10 @@ golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220412211240-33da011f77ad/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220731174439-a90be440212d/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220913120320-3275c407cedc h1:dpclq5m2YrqPGStKmtw7IcNbKLfbIqKXvNxDJKdIKYc=
 golang.org/x/sys v0.0.0-20220913120320-3275c407cedc/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
@@ -334,8 +335,8 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.zx2c4.com/wintun v0.0.0-20211104114900-415007cec224 h1:Ug9qvr1myri/zFN6xL17LSCBGFDnphBBhzmILHsM5TY=
 golang.zx2c4.com/wintun v0.0.0-20211104114900-415007cec224/go.mod h1:deeaetjYA+DHMHg+sMSMI58GrEteJUUzzw7en6TJQcI=
-golang.zx2c4.com/wireguard v0.0.0-20220904105730-b51010ba13f0 h1:5ZkdpbduT/g+9OtbSDvbF3KvfQG45CtH/ppO8FUmvCQ=
-golang.zx2c4.com/wireguard v0.0.0-20220904105730-b51010ba13f0/go.mod h1:enML0deDxY1ux+B6ANGiwtg0yAJi1rctkTpcHNAVPyg=
+golang.zx2c4.com/wireguard v0.0.0-20220829161405-d1d08426b27b h1:qgrKnOfe1zyURRNdmDlGbN32i38Zjmw0B1+TMdHcOvg=
+golang.zx2c4.com/wireguard v0.0.0-20220829161405-d1d08426b27b/go.mod h1:6y4CqPAy54NwiN4nC8K+R1eMpQDB1P2d25qmunh2RSA=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
--- a/test/mux_cool_test.go
+++ b/test/mux_cool_test.go
@@ -0,0 +1,170 @@
+package main
+
+import (
+	"net/netip"
+	"os"
+	"testing"
+
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/option"
+
+	"github.com/spyzhov/ajson"
+	"github.com/stretchr/testify/require"
+)
+
+func TestMuxCoolServer(t *testing.T) {
+	userId := newUUID()
+	content, err := os.ReadFile("config/vmess-mux-client.json")
+	require.NoError(t, err)
+	config, err := ajson.Unmarshal(content)
+	require.NoError(t, err)
+
+	config.MustKey("inbounds").MustIndex(0).MustKey("port").SetNumeric(float64(clientPort))
+	outbound := config.MustKey("outbounds").MustIndex(0).MustKey("settings").MustKey("vnext").MustIndex(0)
+	outbound.MustKey("port").SetNumeric(float64(serverPort))
+	user := outbound.MustKey("users").MustIndex(0)
+	user.MustKey("id").SetString(userId.String())
+
+	content, err = ajson.Marshal(config)
+	require.NoError(t, err)
+
+	startDockerContainer(t, DockerOptions{
+		Image:      ImageV2RayCore,
+		Ports:      []uint16{serverPort, testPort},
+		EntryPoint: "v2ray",
+		Stdin:      content,
+	})
+
+	startInstance(t, option.Options{
+		Inbounds: []option.Inbound{
+			{
+				Type: C.TypeVMess,
+				VMessOptions: option.VMessInboundOptions{
+					ListenOptions: option.ListenOptions{
+						Listen:     option.ListenAddress(netip.IPv4Unspecified()),
+						ListenPort: serverPort,
+					},
+					Users: []option.VMessUser{
+						{
+							Name: "sekai",
+							UUID: userId.String(),
+						},
+					},
+				},
+			},
+		},
+	})
+
+	testSuit(t, clientPort, testPort)
+}
+
+func TestMuxCoolClient(t *testing.T) {
+	user := newUUID()
+	content, err := os.ReadFile("config/vmess-server.json")
+	require.NoError(t, err)
+	config, err := ajson.Unmarshal(content)
+	require.NoError(t, err)
+
+	inbound := config.MustKey("inbounds").MustIndex(0)
+	inbound.MustKey("port").SetNumeric(float64(serverPort))
+	inbound.MustKey("settings").MustKey("clients").MustIndex(0).MustKey("id").SetString(user.String())
+
+	content, err = ajson.Marshal(config)
+	require.NoError(t, err)
+
+	startDockerContainer(t, DockerOptions{
+		Image:      ImageXRayCore,
+		Ports:      []uint16{serverPort, testPort},
+		EntryPoint: "xray",
+		Stdin:      content,
+	})
+
+	startInstance(t, option.Options{
+		Inbounds: []option.Inbound{
+			{
+				Type: C.TypeMixed,
+				MixedOptions: option.HTTPMixedInboundOptions{
+					ListenOptions: option.ListenOptions{
+						Listen:     option.ListenAddress(netip.IPv4Unspecified()),
+						ListenPort: clientPort,
+					},
+				},
+			},
+		},
+		Outbounds: []option.Outbound{
+			{
+				Type: C.TypeVMess,
+				VMessOptions: option.VMessOutboundOptions{
+					ServerOptions: option.ServerOptions{
+						Server:     "127.0.0.1",
+						ServerPort: serverPort,
+					},
+					UUID:           user.String(),
+					PacketEncoding: "xudp",
+				},
+			},
+		},
+	})
+	testSuit(t, clientPort, testPort)
+}
+
+func TestMuxCoolSelf(t *testing.T) {
+	user := newUUID()
+	startInstance(t, option.Options{
+		Inbounds: []option.Inbound{
+			{
+				Type: C.TypeMixed,
+				Tag:  "mixed-in",
+				MixedOptions: option.HTTPMixedInboundOptions{
+					ListenOptions: option.ListenOptions{
+						Listen:     option.ListenAddress(netip.IPv4Unspecified()),
+						ListenPort: clientPort,
+					},
+				},
+			},
+			{
+				Type: C.TypeVMess,
+				VMessOptions: option.VMessInboundOptions{
+					ListenOptions: option.ListenOptions{
+						Listen:     option.ListenAddress(netip.IPv4Unspecified()),
+						ListenPort: serverPort,
+					},
+					Users: []option.VMessUser{
+						{
+							Name: "sekai",
+							UUID: user.String(),
+						},
+					},
+				},
+			},
+		},
+		Outbounds: []option.Outbound{
+			{
+				Type: C.TypeDirect,
+			},
+			{
+				Type: C.TypeVMess,
+				Tag:  "vmess-out",
+				VMessOptions: option.VMessOutboundOptions{
+					ServerOptions: option.ServerOptions{
+						Server:     "127.0.0.1",
+						ServerPort: serverPort,
+					},
+					UUID:           user.String(),
+					PacketEncoding: "xudp",
+				},
+			},
+		},
+		Route: &option.RouteOptions{
+			Rules: []option.Rule{
+				{
+					DefaultOptions: option.DefaultRule{
+						Inbound:  []string{"mixed-in"},
+						Outbound: "vmess-out",
+					},
+				},
+			},
+		},
+	})
+	testSuit(t, clientPort, testPort)
+}
--- a/test/mux_test.go
+++ b/test/mux_test.go
@@ -17,6 +17,10 @@ var muxProtocols = []mux.Protocol{
 	mux.ProtocolSMux,
 }

+func TestVMessSMux(t *testing.T) {
+	testVMessMux(t, mux.ProtocolSMux.String())
+}
+
 func TestShadowsocksMux(t *testing.T) {
 	for _, protocol := range muxProtocols {
 		t.Run(protocol.String(), func(t *testing.T) {
@@ -25,14 +29,6 @@ func TestShadowsocksMux(t *testing.T) {
 	}
 }

-func TestVMessMux(t *testing.T) {
-	for _, protocol := range muxProtocols {
-		t.Run(protocol.String(), func(t *testing.T) {
-			testVMessMux(t, protocol.String())
-		})
-	}
-}
-
 func testShadowsocksMux(t *testing.T, protocol string) {
 	method := shadowaead_2022.List[0]
 	password := mkBase64(t, 16)
--- a/test/ss_plugin_test.go
+++ b/test/ss_plugin_test.go
@@ -0,0 +1,63 @@
+package main
+
+import (
+	"net/netip"
+	"testing"
+
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/option"
+)
+
+func TestShadowsocksObfs(t *testing.T) {
+	for _, mode := range []string{
+		"http", "tls",
+	} {
+		t.Run("obfs-local "+mode, func(t *testing.T) {
+			testShadowsocksPlugin(t, "obfs-local", "obfs="+mode, "--plugin obfs-server --plugin-opts obfs="+mode)
+		})
+	}
+}
+
+func TestShadowsocksV2RayPlugin(t *testing.T) {
+	testShadowsocksPlugin(t, "v2ray-plugin", "", "--plugin v2ray-plugin --plugin-opts=server")
+}
+
+func testShadowsocksPlugin(t *testing.T, name string, opts string, args string) {
+	startDockerContainer(t, DockerOptions{
+		Image: ImageShadowsocksLegacy,
+		Ports: []uint16{serverPort, testPort},
+		Env: []string{
+			"SS_MODULE=ss-server",
+			"SS_CONFIG=-s 0.0.0.0 -u -p 10000 -m chacha20-ietf-poly1305 -k FzcLbKs2dY9mhL " + args,
+		},
+	})
+	startInstance(t, option.Options{
+		Inbounds: []option.Inbound{
+			{
+				Type: C.TypeMixed,
+				MixedOptions: option.HTTPMixedInboundOptions{
+					ListenOptions: option.ListenOptions{
+						Listen:     option.ListenAddress(netip.IPv4Unspecified()),
+						ListenPort: clientPort,
+					},
+				},
+			},
+		},
+		Outbounds: []option.Outbound{
+			{
+				Type: C.TypeShadowsocks,
+				ShadowsocksOptions: option.ShadowsocksOutboundOptions{
+					ServerOptions: option.ServerOptions{
+						Server:     "127.0.0.1",
+						ServerPort: serverPort,
+					},
+					Method:        "chacha20-ietf-poly1305",
+					Password:      "FzcLbKs2dY9mhL",
+					Plugin:        name,
+					PluginOptions: opts,
+				},
+			},
+		},
+	})
+	testSuitSimple(t, clientPort, testPort)
+}
--- a/test/vmess_test.go
+++ b/test/vmess_test.go
@@ -18,7 +18,7 @@ func newUUID() uuid.UUID {
 	return user
 }

-func _TestVMessAuto(t *testing.T) {
+func TestVMessAuto(t *testing.T) {
 	security := "auto"
 	t.Run("self", func(t *testing.T) {
 		testVMessSelf(t, security, 0, false, false, false)
@@ -306,7 +306,7 @@ func testVMessSelf(t *testing.T, security string, alterId int, globalPadding boo
 					AlterId:             alterId,
 					GlobalPadding:       globalPadding,
 					AuthenticatedLength: authenticatedLength,
-					PacketAddr:          packetAddr,
+					PacketEncoding:      "packetaddr",
 				},
 			},
 		},
--- a/transport/hysteria/protocol.go
+++ b/transport/hysteria/protocol.go
@@ -462,7 +462,7 @@ func (c *PacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, er
 		return
 	}
 	err = common.Error(buffer.Write(msg.Data))
-	destination = M.ParseSocksaddrHostPort(msg.Host, msg.Port)
+	destination = M.ParseSocksaddrHostPort(msg.Host, msg.Port).Unwrap()
 	return
 }

@@ -473,20 +473,39 @@ func (c *PacketConn) ReadPacketThreadSafe() (buffer *buf.Buffer, destination M.S
 		return
 	}
 	buffer = buf.As(msg.Data)
-	destination = M.ParseSocksaddrHostPort(msg.Host, msg.Port)
+	destination = M.ParseSocksaddrHostPort(msg.Host, msg.Port).Unwrap()
 	return
 }

 func (c *PacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
 	return WriteUDPMessage(c.session, UDPMessage{
 		SessionID: c.sessionId,
-		Host:      destination.Unwrap().AddrString(),
+		Host:      destination.AddrString(),
 		Port:      destination.Port,
 		FragCount: 1,
 		Data:      buffer.Bytes(),
 	})
 }

+func (c *PacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	msg := <-c.msgCh
+	if msg == nil {
+		err = net.ErrClosed
+		return
+	}
+	n = copy(p, msg.Data)
+	addr = M.ParseSocksaddrHostPort(msg.Host, msg.Port).UDPAddr()
+	return
+}
+
+func (c *PacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	err = c.WritePacket(buf.As(p), M.SocksaddrFromNet(addr))
+	if err == nil {
+		n = len(p)
+	}
+	return
+}
+
 func (c *PacketConn) LocalAddr() net.Addr {
 	return nil
 }
@@ -507,14 +526,6 @@ func (c *PacketConn) SetWriteDeadline(t time.Time) error {
 	return os.ErrInvalid
 }

-func (c *PacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
-	return 0, nil, os.ErrInvalid
-}
-
-func (c *PacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
-	return 0, os.ErrInvalid
-}
-
 func (c *PacketConn) Read(b []byte) (n int, err error) {
 	return 0, os.ErrInvalid
 }
--- a/transport/sip003/obfs.go
+++ b/transport/sip003/obfs.go
@@ -19,7 +19,10 @@ func init() {
 }

 func newObfsLocal(pluginOpts Args, router adapter.Router, dialer N.Dialer, serverAddr M.Socksaddr) (Plugin, error) {
-	var plugin ObfsLocal
+	plugin := &ObfsLocal{
+		dialer:     dialer,
+		serverAddr: serverAddr,
+	}
 	mode := "http"
 	if obfsMode, loaded := pluginOpts.Get("obfs"); loaded {
 		mode = obfsMode
@@ -35,7 +38,7 @@ func newObfsLocal(pluginOpts Args, router adapter.Router, dialer N.Dialer, serve
 		return nil, E.New("unknown obfs mode ", mode)
 	}
 	plugin.port = F.ToString(serverAddr.Port)
-	return &plugin, nil
+	return plugin, nil
 }

 type ObfsLocal struct {
--- a/transport/sip003/v2ray.go
+++ b/transport/sip003/v2ray.go
@@ -2,12 +2,15 @@ package sip003

 import (
 	"context"
+	"net"
+	"strconv"

 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/common/tls"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-box/transport/v2ray"
+	"github.com/sagernet/sing-vmess"
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
@@ -56,6 +59,7 @@ func newV2RayPlugin(pluginOpts Args, router adapter.Router, dialer N.Dialer, ser
 		}
 	}

+	var mux int
 	var transportOptions option.V2RayTransportOptions
 	switch mode {
 	case "websocket":
@@ -68,6 +72,15 @@ func newV2RayPlugin(pluginOpts Args, router adapter.Router, dialer N.Dialer, ser
 				Path: path,
 			},
 		}
+		if muxOpt, loaded := pluginOpts.Get("mux"); loaded {
+			muxVal, err := strconv.Atoi(muxOpt)
+			if err != nil {
+				return nil, E.Cause(err, "parse mux value")
+			}
+			mux = muxVal
+		} else {
+			mux = 1
+		}
 	case "quic":
 		transportOptions = option.V2RayTransportOptions{
 			Type: C.V2RayTransportTypeQUIC,
@@ -76,5 +89,28 @@ func newV2RayPlugin(pluginOpts Args, router adapter.Router, dialer N.Dialer, ser
 		return nil, E.New("v2ray-plugin: unknown mode: " + mode)
 	}

-	return v2ray.NewClientTransport(context.Background(), dialer, serverAddr, transportOptions, tlsClient)
+	transport, err := v2ray.NewClientTransport(context.Background(), dialer, serverAddr, transportOptions, tlsClient)
+	if err != nil {
+		return nil, err
+	}
+
+	if mux > 0 {
+		return &v2rayMuxWrapper{transport}, nil
+	}
+
+	return transport, nil
+}
+
+var _ Plugin = (*v2rayMuxWrapper)(nil)
+
+type v2rayMuxWrapper struct {
+	adapter.V2RayClientTransport
+}
+
+func (w *v2rayMuxWrapper) DialContext(ctx context.Context) (net.Conn, error) {
+	conn, err := w.V2RayClientTransport.DialContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return vmess.NewMuxConnWrapper(conn, vmess.MuxDestination), nil
 }
--- a/transport/v2raygrpc/server.go
+++ b/transport/v2raygrpc/server.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"net"
 	"os"
+	"strings"

 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/common/tls"
@@ -13,6 +14,8 @@ import (

 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
+	gM "google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/peer"
 )

 var _ adapter.V2RayServerTransport = (*Server)(nil)
@@ -41,7 +44,22 @@ func NewServer(ctx context.Context, options option.V2RayGRPCOptions, tlsConfig t
 func (s *Server) Tun(server GunService_TunServer) error {
 	ctx, cancel := context.WithCancel(s.ctx)
 	conn := NewGRPCConn(server, cancel)
-	go s.handler.NewConnection(ctx, conn, M.Metadata{})
+	var metadata M.Metadata
+	if remotePeer, loaded := peer.FromContext(server.Context()); loaded {
+		metadata.Source = M.SocksaddrFromNet(remotePeer.Addr)
+	}
+	if grpcMetadata, loaded := gM.FromIncomingContext(server.Context()); loaded {
+		forwardFrom := strings.Join(grpcMetadata.Get("X-Forwarded-For"), ",")
+		if forwardFrom != "" {
+			for _, from := range strings.Split(forwardFrom, ",") {
+				originAddr := M.ParseSocksaddr(from)
+				if originAddr.IsValid() {
+					metadata.Source = originAddr.Unwrap()
+				}
+			}
+		}
+	}
+	go s.handler.NewConnection(ctx, conn, metadata)
 	<-ctx.Done()
 	return nil
 }
--- a/transport/v2rayquic/client.go
+++ b/transport/v2rayquic/client.go
@@ -25,8 +25,9 @@ type Client struct {
 	serverAddr M.Socksaddr
 	tlsConfig  *tls.STDConfig
 	quicConfig *quic.Config
-	conn       quic.Connection
 	connAccess sync.Mutex
+	conn       quic.Connection
+	rawConn    net.Conn
 }

 func NewClient(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, options option.V2RayQUICOptions, tlsConfig tls.Config) (adapter.V2RayClientTransport, error) {
@@ -64,7 +65,6 @@ func (c *Client) offer() (quic.Connection, error) {
 	if err != nil {
 		return nil, err
 	}
-	c.conn = conn
 	return conn, nil
 }

@@ -80,6 +80,8 @@ func (c *Client) offerNew() (quic.Connection, error) {
 		packetConn.Close()
 		return nil, err
 	}
+	c.conn = quicConn
+	c.rawConn = udpConn
 	return quicConn, nil
 }

@@ -94,3 +96,7 @@ func (c *Client) DialContext(ctx context.Context) (net.Conn, error) {
 	}
 	return &hysteria.StreamWrapper{Conn: conn, Stream: stream}, nil
 }
+
+func (c *Client) Close() error {
+	return common.Close(c.conn, c.rawConn)
+}
--- a/transport/v2raywebsocket/client.go
+++ b/transport/v2raywebsocket/client.go
@@ -74,7 +74,7 @@ func (c *Client) DialContext(ctx context.Context) (net.Conn, error) {
 	if c.maxEarlyData <= 0 {
 		conn, response, err := c.dialer.DialContext(ctx, c.uri, c.headers)
 		if err == nil {
-			return &WebsocketConn{Conn: conn}, nil
+			return &WebsocketConn{Conn: conn, Writer: &Writer{conn, false}}, nil
 		}
 		return nil, wrapDialError(response, err)
 	} else {
--- a/transport/v2raywebsocket/conn.go
+++ b/transport/v2raywebsocket/conn.go
@@ -10,16 +10,26 @@ import (
 	"time"

 	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing/common/buf"
 	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/websocket"
 )

 type WebsocketConn struct {
 	*websocket.Conn
+	*Writer
 	remoteAddr net.Addr
 	reader     io.Reader
 }

+func NewServerConn(wsConn *websocket.Conn, remoteAddr net.Addr) *WebsocketConn {
+	return &WebsocketConn{
+		Conn:       wsConn,
+		remoteAddr: remoteAddr,
+		Writer:     &Writer{wsConn, true},
+	}
+}
+
 func (c *WebsocketConn) Close() error {
 	err := c.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""), time.Now().Add(C.TCPTimeout))
 	if err != nil {
@@ -47,14 +57,6 @@ func (c *WebsocketConn) Read(b []byte) (n int, err error) {
 	}
 }

-func (c *WebsocketConn) Write(b []byte) (n int, err error) {
-	err = wrapError(c.WriteMessage(websocket.BinaryMessage, b))
-	if err != nil {
-		return
-	}
-	return len(b), nil
-}
-
 func (c *WebsocketConn) RemoteAddr() net.Addr {
 	if c.remoteAddr != nil {
 		return c.remoteAddr
@@ -66,6 +68,10 @@ func (c *WebsocketConn) SetDeadline(t time.Time) error {
 	return os.ErrInvalid
 }

+func (c *WebsocketConn) FrontHeadroom() int {
+	return frontHeadroom
+}
+
 type EarlyWebsocketConn struct {
 	*Client
 	ctx    context.Context
@@ -90,9 +96,9 @@ func (c *EarlyWebsocketConn) Write(b []byte) (n int, err error) {
 		conn      *websocket.Conn
 		response  *http.Response
 	)
-	if len(earlyData) > int(c.maxEarlyData) {
-		earlyData = earlyData[:c.maxEarlyData]
-		lateData = lateData[c.maxEarlyData:]
+	if len(b) > int(c.maxEarlyData) {
+		earlyData = b[:c.maxEarlyData]
+		lateData = b[c.maxEarlyData:]
 	} else {
 		earlyData = b
 	}
@@ -111,7 +117,7 @@ func (c *EarlyWebsocketConn) Write(b []byte) (n int, err error) {
 	if err != nil {
 		return 0, wrapDialError(response, err)
 	}
-	c.conn = &WebsocketConn{Conn: conn}
+	c.conn = &WebsocketConn{Conn: conn, Writer: &Writer{conn, false}}
 	close(c.create)
 	if len(lateData) > 0 {
 		_, err = c.conn.Write(lateData)
@@ -122,6 +128,46 @@ func (c *EarlyWebsocketConn) Write(b []byte) (n int, err error) {
 	return len(b), nil
 }

+func (c *EarlyWebsocketConn) WriteBuffer(buffer *buf.Buffer) error {
+	if c.conn != nil {
+		return c.conn.WriteBuffer(buffer)
+	}
+	var (
+		earlyData []byte
+		lateData  []byte
+		conn      *websocket.Conn
+		response  *http.Response
+		err       error
+	)
+	if buffer.Len() > int(c.maxEarlyData) {
+		earlyData = buffer.Bytes()[:c.maxEarlyData]
+		lateData = buffer.Bytes()[c.maxEarlyData:]
+	} else {
+		earlyData = buffer.Bytes()
+	}
+	if len(earlyData) > 0 {
+		earlyDataString := base64.RawURLEncoding.EncodeToString(earlyData)
+		if c.earlyDataHeaderName == "" {
+			conn, response, err = c.dialer.DialContext(c.ctx, c.uri+earlyDataString, c.headers)
+		} else {
+			headers := c.headers.Clone()
+			headers.Set(c.earlyDataHeaderName, earlyDataString)
+			conn, response, err = c.dialer.DialContext(c.ctx, c.uri, headers)
+		}
+	} else {
+		conn, response, err = c.dialer.DialContext(c.ctx, c.uri, c.headers)
+	}
+	if err != nil {
+		return wrapDialError(response, err)
+	}
+	c.conn = &WebsocketConn{Conn: conn, Writer: &Writer{conn, false}}
+	close(c.create)
+	if len(lateData) > 0 {
+		_, err = c.conn.Write(lateData)
+	}
+	return err
+}
+
 func (c *EarlyWebsocketConn) Close() error {
 	if c.conn == nil {
 		return nil
@@ -164,6 +210,10 @@ func (c *EarlyWebsocketConn) SetWriteDeadline(t time.Time) error {
 	return c.conn.SetWriteDeadline(t)
 }

+func (c *EarlyWebsocketConn) FrontHeadroom() int {
+	return frontHeadroom
+}
+
 func wrapError(err error) error {
 	if websocket.IsCloseError(err, websocket.CloseNormalClosure) {
 		return io.EOF
--- a/transport/v2raywebsocket/mask.go
+++ b/transport/v2raywebsocket/mask.go
@@ -0,0 +1,6 @@
+package v2raywebsocket
+
+import _ "unsafe"
+
+//go:linkname maskBytes github.com/sagernet/websocket.maskBytes
+func maskBytes(key [4]byte, pos int, b []byte) int
--- a/transport/v2raywebsocket/server.go
+++ b/transport/v2raywebsocket/server.go
@@ -108,10 +108,7 @@ func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
 	}
 	var metadata M.Metadata
 	metadata.Source = sHttp.SourceAddress(request)
-	conn = &WebsocketConn{
-		Conn:       wsConn,
-		remoteAddr: metadata.Source.TCPAddr(),
-	}
+	conn = NewServerConn(wsConn, metadata.Source.TCPAddr())
 	if len(earlyData) > 0 {
 		conn = bufio.NewCachedConn(conn, buf.As(earlyData))
 	}
--- a/transport/v2raywebsocket/writer.go
+++ b/transport/v2raywebsocket/writer.go
@@ -0,0 +1,73 @@
+package v2raywebsocket
+
+import (
+	"encoding/binary"
+	"math/rand"
+
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/websocket"
+)
+
+const frontHeadroom = 14
+
+type Writer struct {
+	*websocket.Conn
+	isServer bool
+}
+
+func (w *Writer) Write(p []byte) (n int, err error) {
+	err = w.Conn.WriteMessage(websocket.BinaryMessage, p)
+	if err != nil {
+		return
+	}
+	return len(p), nil
+}
+
+func (w *Writer) WriteBuffer(buffer *buf.Buffer) error {
+	defer buffer.Release()
+
+	var payloadBitLength int
+	dataLen := buffer.Len()
+	data := buffer.Bytes()
+	if dataLen < 126 {
+		payloadBitLength = 1
+	} else if dataLen < 65536 {
+		payloadBitLength = 3
+	} else {
+		payloadBitLength = 9
+	}
+
+	var headerLen int
+	headerLen += 1 // FIN / RSV / OPCODE
+	headerLen += payloadBitLength
+	if !w.isServer {
+		headerLen += 4 // MASK KEY
+	}
+
+	header := buffer.ExtendHeader(headerLen)
+	header[0] = websocket.BinaryMessage | 1<<7
+	if w.isServer {
+		header[1] = 0
+	} else {
+		header[1] = 1 << 7
+	}
+
+	if dataLen < 126 {
+		header[1] |= byte(dataLen)
+	} else if dataLen < 65536 {
+		header[1] |= 126
+		binary.BigEndian.PutUint16(header[2:], uint16(dataLen))
+	} else {
+		header[1] |= 127
+		binary.BigEndian.PutUint64(header[2:], uint64(dataLen))
+	}
+
+	if !w.isServer {
+		maskKey := rand.Uint32()
+		binary.BigEndian.PutUint32(header[1+payloadBitLength:], maskKey)
+		maskBytes(*(*[4]byte)(header[1+payloadBitLength:]), 0, data)
+	}
+
+	return common.Error(w.Conn.NetConn().Write(buffer.Bytes()))
+}
--- a/transport/vless/client.go
+++ b/transport/vless/client.go
@@ -1,144 +0,0 @@
-package vless
-
-import (
-	"encoding/binary"
-	"io"
-	"net"
-
-	"github.com/sagernet/sing/common"
-	"github.com/sagernet/sing/common/buf"
-	M "github.com/sagernet/sing/common/metadata"
-
-	"github.com/gofrs/uuid"
-)
-
-type Client struct {
-	key []byte
-}
-
-func NewClient(userId string) (*Client, error) {
-	user := uuid.FromStringOrNil(userId)
-	if user == uuid.Nil {
-		user = uuid.NewV5(user, userId)
-	}
-	return &Client{key: user.Bytes()}, nil
-}
-
-func (c *Client) DialEarlyConn(conn net.Conn, destination M.Socksaddr) *Conn {
-	return &Conn{Conn: conn, key: c.key, destination: destination}
-}
-
-func (c *Client) DialPacketConn(conn net.Conn, destination M.Socksaddr) *PacketConn {
-	return &PacketConn{Conn: conn, key: c.key, destination: destination}
-}
-
-func (c *Client) DialXUDPPacketConn(conn net.Conn, destination M.Socksaddr) *XUDPConn {
-	return &XUDPConn{Conn: conn, key: c.key, destination: destination}
-}
-
-type Conn struct {
-	net.Conn
-	key            []byte
-	destination    M.Socksaddr
-	requestWritten bool
-	responseRead   bool
-}
-
-func (c *Conn) Read(b []byte) (n int, err error) {
-	if !c.responseRead {
-		err = ReadResponse(c.Conn)
-		if err != nil {
-			return
-		}
-		c.responseRead = true
-	}
-	return c.Conn.Read(b)
-}
-
-func (c *Conn) Write(b []byte) (n int, err error) {
-	if !c.requestWritten {
-		err = WriteRequest(c.Conn, Request{c.key, CommandTCP, c.destination}, b)
-		if err == nil {
-			n = len(b)
-		}
-		c.requestWritten = true
-		return
-	}
-	return c.Conn.Write(b)
-}
-
-func (c *Conn) Upstream() any {
-	return c.Conn
-}
-
-type PacketConn struct {
-	net.Conn
-	key            []byte
-	destination    M.Socksaddr
-	requestWritten bool
-	responseRead   bool
-}
-
-func (c *PacketConn) Read(b []byte) (n int, err error) {
-	if !c.responseRead {
-		err = ReadResponse(c.Conn)
-		if err != nil {
-			return
-		}
-		c.responseRead = true
-	}
-	var length uint16
-	err = binary.Read(c.Conn, binary.BigEndian, &length)
-	if err != nil {
-		return
-	}
-	if cap(b) < int(length) {
-		return 0, io.ErrShortBuffer
-	}
-	return io.ReadFull(c.Conn, b[:length])
-}
-
-func (c *PacketConn) Write(b []byte) (n int, err error) {
-	if !c.requestWritten {
-		err = WritePacketRequest(c.Conn, Request{c.key, CommandUDP, c.destination}, b)
-		if err == nil {
-			n = len(b)
-		}
-		c.requestWritten = true
-		return
-	}
-	err = binary.Write(c.Conn, binary.BigEndian, uint16(len(b)))
-	if err != nil {
-		return
-	}
-	return c.Conn.Write(b)
-}
-
-func (c *PacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
-	defer buffer.Release()
-	dataLen := buffer.Len()
-	binary.BigEndian.PutUint16(buffer.ExtendHeader(2), uint16(dataLen))
-	if !c.requestWritten {
-		err := WritePacketRequest(c.Conn, Request{c.key, CommandUDP, c.destination}, buffer.Bytes())
-		c.requestWritten = true
-		return err
-	}
-	return common.Error(c.Conn.Write(buffer.Bytes()))
-}
-
-func (c *PacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
-	n, err = c.Read(p)
-	return
-}
-
-func (c *PacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
-	return c.Write(p)
-}
-
-func (c *PacketConn) FrontHeadroom() int {
-	return 2
-}
-
-func (c *PacketConn) Upstream() any {
-	return c.Conn
-}
--- a/transport/vless/protocol.go
+++ b/transport/vless/protocol.go
@@ -1,104 +0,0 @@
-package vless
-
-import (
-	"encoding/binary"
-	"io"
-
-	"github.com/sagernet/sing/common"
-	"github.com/sagernet/sing/common/buf"
-	E "github.com/sagernet/sing/common/exceptions"
-	M "github.com/sagernet/sing/common/metadata"
-	"github.com/sagernet/sing/common/rw"
-)
-
-const (
-	Version    = 0
-	CommandTCP = 1
-	CommandUDP = 2
-	CommandMux = 3
-	NetworkUDP = 2
-)
-
-var AddressSerializer = M.NewSerializer(
-	M.AddressFamilyByte(0x01, M.AddressFamilyIPv4),
-	M.AddressFamilyByte(0x02, M.AddressFamilyFqdn),
-	M.AddressFamilyByte(0x03, M.AddressFamilyIPv6),
-	M.PortThenAddress(),
-)
-
-type Request struct {
-	UUID        []byte
-	Command     byte
-	Destination M.Socksaddr
-}
-
-func WriteRequest(writer io.Writer, request Request, payload []byte) error {
-	var requestLen int
-	requestLen += 1  // version
-	requestLen += 16 // uuid
-	requestLen += 1  // protobuf length
-	requestLen += 1  // command
-	requestLen += AddressSerializer.AddrPortLen(request.Destination)
-	requestLen += len(payload)
-	_buffer := buf.StackNewSize(requestLen)
-	defer common.KeepAlive(_buffer)
-	buffer := common.Dup(_buffer)
-	defer buffer.Release()
-	common.Must(
-		buffer.WriteByte(Version),
-		common.Error(buffer.Write(request.UUID)),
-		buffer.WriteByte(0),
-		buffer.WriteByte(CommandTCP),
-		AddressSerializer.WriteAddrPort(buffer, request.Destination),
-		common.Error(buffer.Write(payload)),
-	)
-	return common.Error(writer.Write(buffer.Bytes()))
-}
-
-func WritePacketRequest(writer io.Writer, request Request, payload []byte) error {
-	var requestLen int
-	requestLen += 1  // version
-	requestLen += 16 // uuid
-	requestLen += 1  // protobuf length
-	requestLen += 1  // command
-	requestLen += AddressSerializer.AddrPortLen(request.Destination)
-	if len(payload) > 0 {
-		requestLen += 2
-		requestLen += len(payload)
-	}
-	_buffer := buf.StackNewSize(requestLen)
-	defer common.KeepAlive(_buffer)
-	buffer := common.Dup(_buffer)
-	defer buffer.Release()
-	common.Must(
-		buffer.WriteByte(Version),
-		common.Error(buffer.Write(request.UUID)),
-		buffer.WriteByte(0),
-		buffer.WriteByte(CommandUDP),
-		AddressSerializer.WriteAddrPort(buffer, request.Destination),
-		binary.Write(buffer, binary.BigEndian, uint16(len(payload))),
-		common.Error(buffer.Write(payload)),
-	)
-	return common.Error(writer.Write(buffer.Bytes()))
-}
-
-func ReadResponse(reader io.Reader) error {
-	version, err := rw.ReadByte(reader)
-	if err != nil {
-		return err
-	}
-	if version != Version {
-		return E.New("unknown version: ", version)
-	}
-	protobufLength, err := rw.ReadByte(reader)
-	if err != nil {
-		return err
-	}
-	if protobufLength > 0 {
-		err = rw.SkipN(reader, int(protobufLength))
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
--- a/transport/vless/xudp.go
+++ b/transport/vless/xudp.go
@@ -1,174 +0,0 @@
-package vless
-
-import (
-	"encoding/binary"
-	"io"
-	"net"
-	"os"
-
-	"github.com/sagernet/sing/common"
-	"github.com/sagernet/sing/common/buf"
-	E "github.com/sagernet/sing/common/exceptions"
-	M "github.com/sagernet/sing/common/metadata"
-)
-
-type XUDPConn struct {
-	net.Conn
-	key            []byte
-	destination    M.Socksaddr
-	requestWritten bool
-	responseRead   bool
-}
-
-func (c *XUDPConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
-	return 0, nil, os.ErrInvalid
-}
-
-func (c *XUDPConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
-	start := buffer.Start()
-	if !c.responseRead {
-		err = ReadResponse(c.Conn)
-		if err != nil {
-			return
-		}
-		c.responseRead = true
-		buffer.FullReset()
-	}
-	_, err = buffer.ReadFullFrom(c.Conn, 6)
-	if err != nil {
-		return
-	}
-	var length uint16
-	err = binary.Read(buffer, binary.BigEndian, &length)
-	if err != nil {
-		return
-	}
-	header, err := buffer.ReadBytes(4)
-	if err != nil {
-		return
-	}
-	switch header[2] {
-	case 1:
-		// frame new
-		return M.Socksaddr{}, E.New("unexpected frame new")
-	case 2:
-		// frame keep
-		if length != 4 {
-			_, err = buffer.ReadFullFrom(c.Conn, int(length)-2)
-			if err != nil {
-				return
-			}
-			buffer.Advance(1)
-			destination, err = AddressSerializer.ReadAddrPort(buffer)
-			if err != nil {
-				return
-			}
-		} else {
-			_, err = buffer.ReadFullFrom(c.Conn, 2)
-			if err != nil {
-				return
-			}
-			destination = c.destination
-		}
-	case 3:
-		// frame end
-		return M.Socksaddr{}, io.EOF
-	case 4:
-		// frame keep alive
-	default:
-		return M.Socksaddr{}, E.New("unexpected frame: ", buffer.Byte(2))
-	}
-	// option error
-	if header[3]&2 == 2 {
-		return M.Socksaddr{}, E.Cause(net.ErrClosed, "remote closed")
-	}
-	// option data
-	if header[3]&1 != 1 {
-		buffer.Resize(start, 0)
-		return c.ReadPacket(buffer)
-	} else {
-		err = binary.Read(buffer, binary.BigEndian, &length)
-		if err != nil {
-			return
-		}
-		buffer.Resize(start, 0)
-		_, err = buffer.ReadFullFrom(c.Conn, int(length))
-		return
-	}
-}
-
-func (c *XUDPConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
-	destination := M.SocksaddrFromNet(addr)
-	headerLen := c.frontHeadroom(AddressSerializer.AddrPortLen(destination))
-	buffer := buf.NewSize(headerLen + len(p))
-	buffer.Advance(headerLen)
-	common.Must1(buffer.Write(p))
-	err = c.WritePacket(buffer, destination)
-	if err == nil {
-		n = len(p)
-	}
-	return
-}
-
-func (c *XUDPConn) frontHeadroom(addrLen int) int {
-	if !c.requestWritten {
-		var headerLen int
-		headerLen += 1  // version
-		headerLen += 16 // uuid
-		headerLen += 1  // protobuf length
-		headerLen += 1  // command
-		headerLen += 2  // frame len
-		headerLen += 5  // frame header
-		headerLen += addrLen
-		headerLen += 2 // payload len
-		return headerLen
-	} else {
-		return 7 + addrLen + 2
-	}
-}
-
-func (c *XUDPConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
-	defer buffer.Release()
-	dataLen := buffer.Len()
-	addrLen := M.SocksaddrSerializer.AddrPortLen(destination)
-	if !c.requestWritten {
-		header := buf.With(buffer.ExtendHeader(c.frontHeadroom(addrLen)))
-		common.Must(
-			header.WriteByte(Version),
-			common.Error(header.Write(c.key)),
-			header.WriteByte(0),
-			header.WriteByte(CommandMux),
-			binary.Write(header, binary.BigEndian, uint16(5+addrLen)),
-			header.WriteByte(0),
-			header.WriteByte(0),
-			header.WriteByte(1), // frame type new
-			header.WriteByte(1), // option data
-			header.WriteByte(NetworkUDP),
-			AddressSerializer.WriteAddrPort(header, destination),
-			binary.Write(header, binary.BigEndian, uint16(dataLen)),
-		)
-		c.requestWritten = true
-	} else {
-		header := buffer.ExtendHeader(c.frontHeadroom(addrLen))
-		binary.BigEndian.PutUint16(header, uint16(5+addrLen))
-		header[2] = 0
-		header[3] = 0
-		header[4] = 2 // frame keep
-		header[5] = 1 // option data
-		header[6] = NetworkUDP
-		err := AddressSerializer.WriteAddrPort(buf.With(header[7:]), destination)
-		if err != nil {
-			return err
-		}
-		binary.BigEndian.PutUint16(header[7+addrLen:], uint16(dataLen))
-	}
-	return common.Error(c.Conn.Write(buffer.Bytes()))
-}
-
-func (c *XUDPConn) FrontHeadroom() int {
-	return c.frontHeadroom(M.MaxSocksaddrLength)
-}
-
-func (c *XUDPConn) Upstream() any {
-	return c.Conn
-}
--- a/transport/wireguard/client_bind.go
+++ b/transport/wireguard/client_bind.go
@@ -20,6 +20,7 @@ type ClientBind struct {
 	peerAddr   M.Socksaddr
 	connAccess sync.Mutex
 	conn       *wireConn
+	done       chan struct{}
 }

 func NewClientBind(ctx context.Context, dialer N.Dialer, peerAddr M.Socksaddr) *ClientBind {
@@ -63,6 +64,12 @@ func (c *ClientBind) connect() (*wireConn, error) {
 }

 func (c *ClientBind) Open(port uint16) (fns []conn.ReceiveFunc, actualPort uint16, err error) {
+	select {
+	case <-c.done:
+		err = net.ErrClosed
+		return
+	default:
+	}
 	return []conn.ReceiveFunc{c.receive}, 0, nil
 }

@@ -75,7 +82,12 @@ func (c *ClientBind) receive(b []byte) (n int, ep conn.Endpoint, err error) {
 	n, err = udpConn.Read(b)
 	if err != nil {
 		udpConn.Close()
-		err = &wireError{err}
+		select {
+		case <-c.done:
+		default:
+			err = &wireError{err}
+		}
+		return
 	}
 	ep = Endpoint(c.peerAddr)
 	return
@@ -85,6 +97,16 @@ func (c *ClientBind) Close() error {
 	c.connAccess.Lock()
 	defer c.connAccess.Unlock()
 	common.Close(common.PtrOrNil(c.conn))
+	if c.done == nil {
+		c.done = make(chan struct{})
+		return nil
+	}
+	select {
+	case <-c.done:
+		return net.ErrClosed
+	default:
+		close(c.done)
+	}
 	return nil
 }

--- a/transport/wireguard/device_stack.go
+++ b/transport/wireguard/device_stack.go
@@ -35,7 +35,6 @@ type StackDevice struct {
 	events     chan tun.Event
 	outbound   chan *stack.PacketBuffer
 	dispatcher stack.NetworkDispatcher
-	done       chan struct{}
 	addr4      tcpip.Address
 	addr6      tcpip.Address
 }
@@ -51,7 +50,6 @@ func NewStackDevice(localAddresses []netip.Prefix, mtu uint32) (*StackDevice, er
 		mtu:      mtu,
 		events:   make(chan tun.Event, 1),
 		outbound: make(chan *stack.PacketBuffer, 256),
-		done:     make(chan struct{}),
 	}
 	err := ipStack.CreateNIC(defaultNIC, (*wireEndpoint)(tunDevice))
 	if err != nil {
@@ -193,11 +191,11 @@ func (w *StackDevice) Events() chan tun.Event {

 func (w *StackDevice) Close() error {
 	select {
-	case <-w.done:
+	case <-w.events:
 		return os.ErrClosed
 	default:
+		close(w.events)
 	}
-	close(w.done)
 	w.stack.Close()
 	for _, endpoint := range w.stack.CleanupEndpoints() {
 		endpoint.Abort()
--- a/transport/wireguard/device_system.go
+++ b/transport/wireguard/device_system.go
@@ -106,5 +106,11 @@ func (w *SystemDevice) Events() chan wgTun.Event {
 }

 func (w *SystemDevice) Close() error {
+	select {
+	case <-w.events:
+		return os.ErrClosed
+	default:
+		close(w.events)
+	}
 	return w.device.Close()
 }
Author	SHA1	Message	Date
世界	8ce244dd04	Fix documentation Signed-off-by: 世界 <i@sekai.icu> Signed-off-by: unknowndevQwQ <unknowndevQwQ@pm.me>	2022-09-26 12:25:18 +08:00
世界	0f57b93925	Update documentation	2022-09-25 22:29:18 +08:00
世界	c90a77a185	Refine 4in6 processing	2022-09-25 22:29:18 +08:00
世界	c6586f19fa	Fix read source address from grpc-go	2022-09-25 22:29:18 +08:00
世界	cbab86ae38	Refine tproxy write back	2022-09-25 22:29:18 +08:00
世界	17b5f031f1	Fix shadowsocks plugins	2022-09-25 16:43:12 +08:00
世界	b00b6b9e25	Fix fqdn socks5 outbound connection	2022-09-25 14:42:39 +08:00
世界	fb6b3b0401	Fix missing source address from transport connection	2022-09-23 18:55:28 +08:00
世界	22ea878fe9	Improve websocket writer	2022-09-23 18:55:07 +08:00
世界	abe3dc6039	Add self sign cert support	2022-09-23 17:13:18 +08:00
世界	852829b9dc	Add VMess benchmark result	2022-09-23 16:13:29 +08:00
世界	407509c985	Fix leaks and add test	2022-09-23 13:14:31 +08:00
世界	9856b73cb5	Update documentation	2022-09-23 10:30:07 +08:00
世界	f42356fbcb	Fix system stack ipv4 overflow	2022-09-23 10:29:15 +08:00
世界	d0b467671a	Merge VLESS to library	2022-09-23 10:28:51 +08:00
世界	c18c545798	Add stdio test	2022-09-23 10:28:24 +08:00
世界	693ef293ac	Update buffer usage	2022-09-23 10:27:48 +08:00
世界	a006627795	Disable DF on direct outbound by default	2022-09-23 10:27:46 +08:00
世界	0738b184e4	Fix url test interval	2022-09-23 10:27:42 +08:00
世界	42524ba04e	Fix dns sniffer	2022-09-17 16:59:28 +08:00
世界	63fc95b96d	Add mux server and XUDP client for VMess	2022-09-17 11:54:04 +08:00
世界	ab436fc137	Update documentation	2022-09-16 15:48:31 +08:00
世界	1546770bfd	Skip bind on local addr	2022-09-16 15:35:29 +08:00
世界	f4b2099488	Fix tun log	2022-09-16 15:32:50 +08:00
世界	a2c4d68031	Fix create UDP transport	2022-09-15 16:46:53 +08:00
世界	cfe14f2817	Suppress bad http2 error	2022-09-15 15:34:52 +08:00
世界	a5402ffb69	Add back urltest outbound	2022-09-15 15:22:08 +08:00