documentation: Update changelog

Signed-off-by: wwqgtxx <wwqgtxx@gmail.com>

.goreleaser.yaml

@@ -14,7 +14,6 @@ builds:
     tags:
       - with_gvisor
       - with_quic
-      - with_dhcp
       - with_wireguard
       - with_utls
       - with_reality_server
@@ -49,7 +48,6 @@ builds:
     tags:
       - with_gvisor
       - with_quic
-      - with_dhcp
       - with_wireguard
       - with_utls
       - with_clash_api

Dockerfile

@@ -9,7 +9,7 @@ RUN set -ex \
     && apk add git build-base \
     && export COMMIT=$(git rev-parse --short HEAD) \
     && export VERSION=$(go run ./cmd/internal/read_tag) \
-    && go build -v -trimpath -tags with_gvisor,with_quic,with_dhcp,with_wireguard,with_utls,with_reality_server,with_clash_api,with_acme \
+    && go build -v -trimpath -tags with_gvisor,with_quic,with_wireguard,with_utls,with_reality_server,with_clash_api,with_acme \
         -o /go/bin/sing-box \
         -ldflags "-X \"github.com/sagernet/sing-box/constant.Version=$VERSION\" -s -w -buildid=" \
         ./cmd/sing-box

Makefile

@@ -1,6 +1,6 @@
 NAME = sing-box
 COMMIT = $(shell git rev-parse --short HEAD)
-TAGS ?= with_gvisor,with_quic,with_dhcp,with_wireguard,with_utls,with_reality_server,with_clash_api
+TAGS ?= with_gvisor,with_quic,with_wireguard,with_utls,with_reality_server,with_clash_api
 TAGS_TEST ?= with_gvisor,with_quic,with_wireguard,with_grpc,with_ech,with_utls,with_reality_server,with_shadowsocksr
 
 GOHOSTOS = $(shell go env GOHOSTOS)
@@ -22,7 +22,7 @@ install:
 fmt:
 	@gofumpt -l -w .
 	@gofmt -s -w .
-	@gci write --custom-order -s standard -s "prefix(github.com/sagernet/)" -s "default" .
+	@gci write --custom-order -s "standard,prefix(github.com/sagernet/),default" .
 
 fmt_install:
 	go install -v mvdan.cc/gofumpt@latest
@@ -48,14 +48,14 @@ proto_install:
 	go install -v google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
 
 snapshot:
-	go run ./cmd/internal/build goreleaser release --clean --snapshot || exit 1
+	go run ./cmd/internal/build goreleaser release --rm-dist --snapshot || exit 1
 	mkdir dist/release
 	mv dist/*.tar.gz dist/*.zip dist/*.deb dist/*.rpm dist/release
 	ghr --delete --draft --prerelease -p 1 nightly dist/release
 	rm -r dist
 
 release:
-	go run ./cmd/internal/build goreleaser release --clean --skip-publish || exit 1
+	go run ./cmd/internal/build goreleaser release --rm-dist --skip-publish || exit 1
 	mkdir dist/release
 	mv dist/*.tar.gz dist/*.zip dist/*.deb dist/*.rpm dist/release
 	ghr --delete --draft --prerelease -p 3 $(shell git describe --tags) dist/release

adapter/fakeip.go

@@ -21,8 +21,3 @@ type FakeIPStorage interface {
 	FakeIPLoad(address netip.Addr) (string, bool)
 	FakeIPReset() error
 }
-
-type FakeIPTransport interface {
-	dns.Transport
-	Store() FakeIPStore
-}

adapter/inbound.go

@@ -46,7 +46,6 @@ type InboundContext struct {
 	SourceGeoIPCode      string
 	GeoIPCode            string
 	ProcessInfo          *process.Info
-	FakeIP               bool
 
 	// dns cache
 

adapter/outbound.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"net"
 
+	"github.com/sagernet/sing-tun"
 	N "github.com/sagernet/sing/common/network"
 )
 
@@ -13,8 +14,12 @@ type Outbound interface {
 	Type() string
 	Tag() string
 	Network() []string
-	Dependencies() []string
 	N.Dialer
 	NewConnection(ctx context.Context, conn net.Conn, metadata InboundContext) error
 	NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata InboundContext) error
 }
+
+type IPOutbound interface {
+	Outbound
+	NewIPConnection(ctx context.Context, conn tun.RouteContext, metadata InboundContext) (tun.DirectDestination, error)
+}

adapter/router.go

@@ -25,6 +25,9 @@ type Router interface {
 
 	RouteConnection(ctx context.Context, conn net.Conn, metadata InboundContext) error
 	RoutePacketConnection(ctx context.Context, conn N.PacketConn, metadata InboundContext) error
+	RouteIPConnection(ctx context.Context, conn tun.RouteContext, metadata InboundContext) tun.RouteAction
+
+	NatRequired(outbound string) bool
 
 	GeoIPReader() *geoip.Reader
 	LoadGeosite(code string) (Rule, error)
@@ -42,7 +45,9 @@ type Router interface {
 	NetworkMonitor() tun.NetworkUpdateMonitor
 	InterfaceMonitor() tun.DefaultInterfaceMonitor
 	PackageManager() tun.PackageManager
+
 	Rules() []Rule
+	IPRules() []IPRule
 
 	TimeService
 
@@ -51,8 +56,6 @@ type Router interface {
 
 	V2RayServer() V2RayServer
 	SetV2RayServer(server V2RayServer)
-
-	ResetNetwork() error
 }
 
 type routerContextKey struct{}
@@ -84,6 +87,11 @@ type DNSRule interface {
 	RewriteTTL() *uint32
 }
 
+type IPRule interface {
+	Rule
+	Action() tun.ActionType
+}
+
 type InterfaceUpdateListener interface {
 	InterfaceUpdated() error
 }

box.go

@@ -217,9 +217,20 @@ func (s *Box) preStart() error {
 			return E.Cause(err, "pre-starting ", serviceName)
 		}
 	}
-	err := s.startOutbounds()
-	if err != nil {
-		return err
+	for i, out := range s.outbounds {
+		var tag string
+		if out.Tag() == "" {
+			tag = F.ToString(i)
+		} else {
+			tag = out.Tag()
+		}
+		if starter, isStarter := out.(common.Starter); isStarter {
+			s.logger.Trace("initializing outbound/", out.Type(), "[", tag, "]")
+			err := starter.Start()
+			if err != nil {
+				return E.Cause(err, "initialize outbound/", out.Type(), "[", tag, "]")
+			}
+		}
 	}
 	return s.router.Start()
 }

box_outbound.go

@@ -1,79 +0,0 @@
-package box
-
-import (
-	"strings"
-
-	"github.com/sagernet/sing-box/adapter"
-	"github.com/sagernet/sing/common"
-	E "github.com/sagernet/sing/common/exceptions"
-	F "github.com/sagernet/sing/common/format"
-)
-
-func (s *Box) startOutbounds() error {
-	outboundTags := make(map[adapter.Outbound]string)
-	outbounds := make(map[string]adapter.Outbound)
-	for i, outboundToStart := range s.outbounds {
-		var outboundTag string
-		if outboundToStart.Tag() == "" {
-			outboundTag = F.ToString(i)
-		} else {
-			outboundTag = outboundToStart.Tag()
-		}
-		if _, exists := outbounds[outboundTag]; exists {
-			return E.New("outbound tag ", outboundTag, " duplicated")
-		}
-		outboundTags[outboundToStart] = outboundTag
-		outbounds[outboundTag] = outboundToStart
-	}
-	started := make(map[string]bool)
-	for {
-		canContinue := false
-	startOne:
-		for _, outboundToStart := range s.outbounds {
-			outboundTag := outboundTags[outboundToStart]
-			if started[outboundTag] {
-				continue
-			}
-			dependencies := outboundToStart.Dependencies()
-			for _, dependency := range dependencies {
-				if !started[dependency] {
-					continue startOne
-				}
-			}
-			started[outboundTag] = true
-			canContinue = true
-			if starter, isStarter := outboundToStart.(common.Starter); isStarter {
-				s.logger.Trace("initializing outbound/", outboundToStart.Type(), "[", outboundTag, "]")
-				err := starter.Start()
-				if err != nil {
-					return E.Cause(err, "initialize outbound/", outboundToStart.Type(), "[", outboundTag, "]")
-				}
-			}
-		}
-		if len(started) == len(s.outbounds) {
-			break
-		}
-		if canContinue {
-			continue
-		}
-		currentOutbound := common.Find(s.outbounds, func(it adapter.Outbound) bool {
-			return !started[outboundTags[it]]
-		})
-		var lintOutbound func(oTree []string, oCurrent adapter.Outbound) error
-		lintOutbound = func(oTree []string, oCurrent adapter.Outbound) error {
-			problemOutboundTag := common.Find(oCurrent.Dependencies(), func(it string) bool {
-				return !started[it]
-			})
-			if common.Contains(oTree, problemOutboundTag) {
-				return E.New("circular outbound dependency: ", strings.Join(oTree, " -> "), " -> ", problemOutboundTag)
-			}
-			problemOutbound := outbounds[problemOutboundTag]
-			if problemOutbound == nil {
-				return E.New("dependency[", problemOutbound, "] not found for outbound[", outboundTags[oCurrent], "]")
-			}
-			return lintOutbound(append(oTree, problemOutboundTag), problemOutbound)
-		}
-		return lintOutbound([]string{outboundTags[currentOutbound]}, currentOutbound)
-	}
-	return nil
-}

cmd/internal/build/main.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"go/build"
 	"os"
 	"os/exec"
 
@@ -12,10 +11,6 @@ import (
 func main() {
 	build_shared.FindSDK()
 
-	if os.Getenv("build.Default.GOPATH") == "" {
-		os.Setenv("GOPATH", build.Default.GOPATH)
-	}
-
 	command := exec.Command(os.Args[1], os.Args[2:]...)
 	command.Stdout = os.Stdout
 	command.Stderr = os.Stderr

cmd/internal/build_libbox/main.go

@@ -5,7 +5,6 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
-	"strings"
 
 	_ "github.com/sagernet/gomobile/event/key"
 	"github.com/sagernet/sing-box/cmd/internal/build_shared"
@@ -39,24 +38,18 @@ func main() {
 var (
 	sharedFlags []string
 	debugFlags  []string
-	sharedTags  []string
-	iosTags     []string
-	debugTags   []string
 )
 
 func init() {
 	sharedFlags = append(sharedFlags, "-trimpath")
 	sharedFlags = append(sharedFlags, "-ldflags")
+
 	currentTag, err := build_shared.ReadTag()
 	if err != nil {
 		currentTag = "unknown"
 	}
 	sharedFlags = append(sharedFlags, "-X github.com/sagernet/sing-box/constant.Version="+currentTag+" -s -w -buildid=")
 	debugFlags = append(debugFlags, "-X github.com/sagernet/sing-box/constant.Version="+currentTag)
-
-	sharedTags = append(sharedTags, "with_gvisor", "with_quic", "with_wireguard", "with_utls", "with_clash_api")
-	iosTags = append(iosTags, "with_dhcp", "with_low_memory", "with_conntrack")
-	debugTags = append(debugTags, "debug")
 }
 
 func buildAndroid() {
@@ -77,9 +70,9 @@ func buildAndroid() {
 
 	args = append(args, "-tags")
 	if !debugEnabled {
-		args = append(args, strings.Join(sharedTags, ","))
+		args = append(args, "with_gvisor,with_quic,with_wireguard,with_utls,with_clash_api")
 	} else {
-		args = append(args, strings.Join(append(sharedTags, debugTags...), ","))
+		args = append(args, "with_gvisor,with_quic,with_wireguard,with_utls,with_clash_api,debug")
 	}
 	args = append(args, "./experimental/libbox")
 
@@ -116,12 +109,11 @@ func buildiOS() {
 		args = append(args, debugFlags...)
 	}
 
-	tags := append(sharedTags, iosTags...)
 	args = append(args, "-tags")
 	if !debugEnabled {
-		args = append(args, strings.Join(tags, ","))
+		args = append(args, "with_gvisor,with_quic,with_utls,with_clash_api,with_low_memory,with_conntrack")
 	} else {
-		args = append(args, strings.Join(append(tags, debugTags...), ","))
+		args = append(args, "with_gvisor,with_quic,with_utls,with_clash_api,with_low_memory,with_conntrack,debug")
 	}
 	args = append(args, "./experimental/libbox")
 

common/dialer/conntrack/packet_conn.go

@@ -4,7 +4,6 @@ import (
 	"io"
 	"net"
 
-	"github.com/sagernet/sing/common/bufio"
 	"github.com/sagernet/sing/common/x/list"
 )
 
@@ -43,7 +42,7 @@ func (c *PacketConn) Close() error {
 }
 
 func (c *PacketConn) Upstream() any {
-	return bufio.NewPacketConn(c.PacketConn)
+	return c.PacketConn
 }
 
 func (c *PacketConn) ReaderReplaceable() bool {

common/mux/client.go

@@ -1,21 +1,554 @@
 package mux
 
 import (
+	"context"
+	"encoding/binary"
+	"io"
+	"net"
+	"sync"
+
 	"github.com/sagernet/sing-box/option"
-	"github.com/sagernet/sing-mux"
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/sing/common/bufio"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/x/list"
 )
 
-func NewClientWithOptions(dialer N.Dialer, options option.MultiplexOptions) (*Client, error) {
+var _ N.Dialer = (*Client)(nil)
+
+type Client struct {
+	access         sync.Mutex
+	connections    list.List[abstractSession]
+	ctx            context.Context
+	dialer         N.Dialer
+	protocol       Protocol
+	maxConnections int
+	minStreams     int
+	maxStreams     int
+	paddingEnabled bool
+}
+
+func NewClient(ctx context.Context, dialer N.Dialer, protocol Protocol, maxConnections int, minStreams int, maxStreams int, paddingEnabled bool) (*Client, error) {
+	return &Client{
+		ctx:            ctx,
+		dialer:         dialer,
+		protocol:       protocol,
+		maxConnections: maxConnections,
+		minStreams:     minStreams,
+		maxStreams:     maxStreams,
+		paddingEnabled: paddingEnabled,
+	}, nil
+}
+
+func NewClientWithOptions(ctx context.Context, dialer N.Dialer, options option.MultiplexOptions) (*Client, error) {
 	if !options.Enabled {
 		return nil, nil
 	}
-	return mux.NewClient(mux.Options{
-		Dialer:         dialer,
-		Protocol:       options.Protocol,
-		MaxConnections: options.MaxConnections,
-		MinStreams:     options.MinStreams,
-		MaxStreams:     options.MaxStreams,
-		Padding:        options.Padding,
-	})
+	if options.MaxConnections == 0 && options.MaxStreams == 0 {
+		options.MinStreams = 8
+	}
+	protocol, err := ParseProtocol(options.Protocol)
+	if err != nil {
+		return nil, err
+	}
+	return NewClient(ctx, dialer, protocol, options.MaxConnections, options.MinStreams, options.MaxStreams, options.Padding)
+}
+
+func (c *Client) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	switch N.NetworkName(network) {
+	case N.NetworkTCP:
+		stream, err := c.openStream()
+		if err != nil {
+			return nil, err
+		}
+		return &ClientConn{Conn: stream, destination: destination}, nil
+	case N.NetworkUDP:
+		stream, err := c.openStream()
+		if err != nil {
+			return nil, err
+		}
+		return bufio.NewUnbindPacketConn(&ClientPacketConn{ExtendedConn: bufio.NewExtendedConn(stream), destination: destination}), nil
+	default:
+		return nil, E.Extend(N.ErrUnknownNetwork, network)
+	}
+}
+
+func (c *Client) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	stream, err := c.openStream()
+	if err != nil {
+		return nil, err
+	}
+	return &ClientPacketAddrConn{ExtendedConn: bufio.NewExtendedConn(stream), destination: destination}, nil
+}
+
+func (c *Client) openStream() (net.Conn, error) {
+	var (
+		session abstractSession
+		stream  net.Conn
+		err     error
+	)
+	for attempts := 0; attempts < 2; attempts++ {
+		session, err = c.offer()
+		if err != nil {
+			continue
+		}
+		stream, err = session.Open()
+		if err != nil {
+			continue
+		}
+		break
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &wrapStream{stream}, nil
+}
+
+func (c *Client) offer() (abstractSession, error) {
+	c.access.Lock()
+	defer c.access.Unlock()
+
+	sessions := make([]abstractSession, 0, c.maxConnections)
+	for element := c.connections.Front(); element != nil; {
+		if element.Value.IsClosed() {
+			nextElement := element.Next()
+			c.connections.Remove(element)
+			element = nextElement
+			continue
+		}
+		sessions = append(sessions, element.Value)
+		element = element.Next()
+	}
+	session := common.MinBy(common.Filter(sessions, abstractSession.CanTakeNewRequest), abstractSession.NumStreams)
+	if session == nil {
+		return c.offerNew()
+	}
+	numStreams := session.NumStreams()
+	if numStreams == 0 {
+		return session, nil
+	}
+	if c.maxConnections > 0 {
+		if len(sessions) >= c.maxConnections || numStreams < c.minStreams {
+			return session, nil
+		}
+	} else {
+		if c.maxStreams > 0 && numStreams < c.maxStreams {
+			return session, nil
+		}
+	}
+	return c.offerNew()
+}
+
+func (c *Client) offerNew() (abstractSession, error) {
+	conn, err := c.dialer.DialContext(c.ctx, N.NetworkTCP, Destination)
+	if err != nil {
+		return nil, err
+	}
+	var version byte
+	if c.paddingEnabled {
+		version = Version1
+	} else {
+		version = Version0
+	}
+	conn = newProtocolConn(conn, Request{
+		Version:        version,
+		Protocol:       c.protocol,
+		PaddingEnabled: c.paddingEnabled,
+	})
+	if c.paddingEnabled {
+		conn = newPaddingConn(conn)
+	}
+	session, err := c.protocol.newClient(conn)
+	if err != nil {
+		return nil, err
+	}
+	c.connections.PushBack(session)
+	return session, nil
+}
+
+func (c *Client) Reset() {
+	c.access.Lock()
+	defer c.access.Unlock()
+	for _, session := range c.connections.Array() {
+		session.Close()
+	}
+	c.connections.Init()
+}
+
+func (c *Client) Close() error {
+	c.access.Lock()
+	defer c.access.Unlock()
+	for _, session := range c.connections.Array() {
+		session.Close()
+	}
+	return nil
+}
+
+type ClientConn struct {
+	net.Conn
+	destination  M.Socksaddr
+	requestWrite bool
+	responseRead bool
+}
+
+func (c *ClientConn) readResponse() error {
+	response, err := ReadStreamResponse(c.Conn)
+	if err != nil {
+		return err
+	}
+	if response.Status == statusError {
+		return E.New("remote error: ", response.Message)
+	}
+	return nil
+}
+
+func (c *ClientConn) Read(b []byte) (n int, err error) {
+	if !c.responseRead {
+		err = c.readResponse()
+		if err != nil {
+			return
+		}
+		c.responseRead = true
+	}
+	return c.Conn.Read(b)
+}
+
+func (c *ClientConn) Write(b []byte) (n int, err error) {
+	if c.requestWrite {
+		return c.Conn.Write(b)
+	}
+	request := StreamRequest{
+		Network:     N.NetworkTCP,
+		Destination: c.destination,
+	}
+	_buffer := buf.StackNewSize(streamRequestLen(request) + len(b))
+	defer common.KeepAlive(_buffer)
+	buffer := common.Dup(_buffer)
+	defer buffer.Release()
+	EncodeStreamRequest(request, buffer)
+	buffer.Write(b)
+	_, err = c.Conn.Write(buffer.Bytes())
+	if err != nil {
+		return
+	}
+	c.requestWrite = true
+	return len(b), nil
+}
+
+func (c *ClientConn) ReadFrom(r io.Reader) (n int64, err error) {
+	if !c.requestWrite {
+		return bufio.ReadFrom0(c, r)
+	}
+	return bufio.Copy(c.Conn, r)
+}
+
+func (c *ClientConn) WriteTo(w io.Writer) (n int64, err error) {
+	if !c.responseRead {
+		return bufio.WriteTo0(c, w)
+	}
+	return bufio.Copy(w, c.Conn)
+}
+
+func (c *ClientConn) LocalAddr() net.Addr {
+	return c.Conn.LocalAddr()
+}
+
+func (c *ClientConn) RemoteAddr() net.Addr {
+	return c.destination.TCPAddr()
+}
+
+func (c *ClientConn) ReaderReplaceable() bool {
+	return c.responseRead
+}
+
+func (c *ClientConn) WriterReplaceable() bool {
+	return c.requestWrite
+}
+
+func (c *ClientConn) NeedAdditionalReadDeadline() bool {
+	return true
+}
+
+func (c *ClientConn) Upstream() any {
+	return c.Conn
+}
+
+type ClientPacketConn struct {
+	N.ExtendedConn
+	destination  M.Socksaddr
+	requestWrite bool
+	responseRead bool
+}
+
+func (c *ClientPacketConn) readResponse() error {
+	response, err := ReadStreamResponse(c.ExtendedConn)
+	if err != nil {
+		return err
+	}
+	if response.Status == statusError {
+		return E.New("remote error: ", response.Message)
+	}
+	return nil
+}
+
+func (c *ClientPacketConn) Read(b []byte) (n int, err error) {
+	if !c.responseRead {
+		err = c.readResponse()
+		if err != nil {
+			return
+		}
+		c.responseRead = true
+	}
+	var length uint16
+	err = binary.Read(c.ExtendedConn, binary.BigEndian, &length)
+	if err != nil {
+		return
+	}
+	if cap(b) < int(length) {
+		return 0, io.ErrShortBuffer
+	}
+	return io.ReadFull(c.ExtendedConn, b[:length])
+}
+
+func (c *ClientPacketConn) writeRequest(payload []byte) (n int, err error) {
+	request := StreamRequest{
+		Network:     N.NetworkUDP,
+		Destination: c.destination,
+	}
+	rLen := streamRequestLen(request)
+	if len(payload) > 0 {
+		rLen += 2 + len(payload)
+	}
+	_buffer := buf.StackNewSize(rLen)
+	defer common.KeepAlive(_buffer)
+	buffer := common.Dup(_buffer)
+	defer buffer.Release()
+	EncodeStreamRequest(request, buffer)
+	if len(payload) > 0 {
+		common.Must(
+			binary.Write(buffer, binary.BigEndian, uint16(len(payload))),
+			common.Error(buffer.Write(payload)),
+		)
+	}
+	_, err = c.ExtendedConn.Write(buffer.Bytes())
+	if err != nil {
+		return
+	}
+	c.requestWrite = true
+	return len(payload), nil
+}
+
+func (c *ClientPacketConn) Write(b []byte) (n int, err error) {
+	if !c.requestWrite {
+		return c.writeRequest(b)
+	}
+	err = binary.Write(c.ExtendedConn, binary.BigEndian, uint16(len(b)))
+	if err != nil {
+		return
+	}
+	return c.ExtendedConn.Write(b)
+}
+
+func (c *ClientPacketConn) ReadBuffer(buffer *buf.Buffer) (err error) {
+	if !c.responseRead {
+		err = c.readResponse()
+		if err != nil {
+			return
+		}
+		c.responseRead = true
+	}
+	var length uint16
+	err = binary.Read(c.ExtendedConn, binary.BigEndian, &length)
+	if err != nil {
+		return
+	}
+	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
+	return
+}
+
+func (c *ClientPacketConn) WriteBuffer(buffer *buf.Buffer) error {
+	if !c.requestWrite {
+		defer buffer.Release()
+		return common.Error(c.writeRequest(buffer.Bytes()))
+	}
+	bLen := buffer.Len()
+	binary.BigEndian.PutUint16(buffer.ExtendHeader(2), uint16(bLen))
+	return c.ExtendedConn.WriteBuffer(buffer)
+}
+
+func (c *ClientPacketConn) FrontHeadroom() int {
+	return 2
+}
+
+func (c *ClientPacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
+	err = c.ReadBuffer(buffer)
+	return
+}
+
+func (c *ClientPacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
+	return c.WriteBuffer(buffer)
+}
+
+func (c *ClientPacketConn) LocalAddr() net.Addr {
+	return c.ExtendedConn.LocalAddr()
+}
+
+func (c *ClientPacketConn) RemoteAddr() net.Addr {
+	return c.destination.UDPAddr()
+}
+
+func (c *ClientPacketConn) NeedAdditionalReadDeadline() bool {
+	return true
+}
+
+func (c *ClientPacketConn) Upstream() any {
+	return c.ExtendedConn
+}
+
+var _ N.NetPacketConn = (*ClientPacketAddrConn)(nil)
+
+type ClientPacketAddrConn struct {
+	N.ExtendedConn
+	destination  M.Socksaddr
+	requestWrite bool
+	responseRead bool
+}
+
+func (c *ClientPacketAddrConn) readResponse() error {
+	response, err := ReadStreamResponse(c.ExtendedConn)
+	if err != nil {
+		return err
+	}
+	if response.Status == statusError {
+		return E.New("remote error: ", response.Message)
+	}
+	return nil
+}
+
+func (c *ClientPacketAddrConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if !c.responseRead {
+		err = c.readResponse()
+		if err != nil {
+			return
+		}
+		c.responseRead = true
+	}
+	destination, err := M.SocksaddrSerializer.ReadAddrPort(c.ExtendedConn)
+	if err != nil {
+		return
+	}
+	if destination.IsFqdn() {
+		addr = destination
+	} else {
+		addr = destination.UDPAddr()
+	}
+	var length uint16
+	err = binary.Read(c.ExtendedConn, binary.BigEndian, &length)
+	if err != nil {
+		return
+	}
+	if cap(p) < int(length) {
+		return 0, nil, io.ErrShortBuffer
+	}
+	n, err = io.ReadFull(c.ExtendedConn, p[:length])
+	return
+}
+
+func (c *ClientPacketAddrConn) writeRequest(payload []byte, destination M.Socksaddr) (n int, err error) {
+	request := StreamRequest{
+		Network:     N.NetworkUDP,
+		Destination: c.destination,
+		PacketAddr:  true,
+	}
+	rLen := streamRequestLen(request)
+	if len(payload) > 0 {
+		rLen += M.SocksaddrSerializer.AddrPortLen(destination) + 2 + len(payload)
+	}
+	_buffer := buf.StackNewSize(rLen)
+	defer common.KeepAlive(_buffer)
+	buffer := common.Dup(_buffer)
+	defer buffer.Release()
+	EncodeStreamRequest(request, buffer)
+	if len(payload) > 0 {
+		common.Must(
+			M.SocksaddrSerializer.WriteAddrPort(buffer, destination),
+			binary.Write(buffer, binary.BigEndian, uint16(len(payload))),
+			common.Error(buffer.Write(payload)),
+		)
+	}
+	_, err = c.ExtendedConn.Write(buffer.Bytes())
+	if err != nil {
+		return
+	}
+	c.requestWrite = true
+	return len(payload), nil
+}
+
+func (c *ClientPacketAddrConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if !c.requestWrite {
+		return c.writeRequest(p, M.SocksaddrFromNet(addr))
+	}
+	err = M.SocksaddrSerializer.WriteAddrPort(c.ExtendedConn, M.SocksaddrFromNet(addr))
+	if err != nil {
+		return
+	}
+	err = binary.Write(c.ExtendedConn, binary.BigEndian, uint16(len(p)))
+	if err != nil {
+		return
+	}
+	return c.ExtendedConn.Write(p)
+}
+
+func (c *ClientPacketAddrConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
+	if !c.responseRead {
+		err = c.readResponse()
+		if err != nil {
+			return
+		}
+		c.responseRead = true
+	}
+	destination, err = M.SocksaddrSerializer.ReadAddrPort(c.ExtendedConn)
+	if err != nil {
+		return
+	}
+	var length uint16
+	err = binary.Read(c.ExtendedConn, binary.BigEndian, &length)
+	if err != nil {
+		return
+	}
+	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
+	return
+}
+
+func (c *ClientPacketAddrConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
+	if !c.requestWrite {
+		defer buffer.Release()
+		return common.Error(c.writeRequest(buffer.Bytes(), destination))
+	}
+	bLen := buffer.Len()
+	header := buf.With(buffer.ExtendHeader(M.SocksaddrSerializer.AddrPortLen(destination) + 2))
+	common.Must(
+		M.SocksaddrSerializer.WriteAddrPort(header, destination),
+		binary.Write(header, binary.BigEndian, uint16(bLen)),
+	)
+	return c.ExtendedConn.WriteBuffer(buffer)
+}
+
+func (c *ClientPacketAddrConn) LocalAddr() net.Addr {
+	return c.ExtendedConn.LocalAddr()
+}
+
+func (c *ClientPacketAddrConn) FrontHeadroom() int {
+	return 2 + M.MaxSocksaddrLength
+}
+
+func (c *ClientPacketAddrConn) NeedAdditionalReadDeadline() bool {
+	return true
+}
+
+func (c *ClientPacketAddrConn) Upstream() any {
+	return c.ExtendedConn
 }

common/mux/h2mux.go

@@ -0,0 +1,235 @@
+package mux
+
+import (
+	"context"
+	"crypto/tls"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"time"
+
+	"github.com/sagernet/sing-box/transport/v2rayhttp"
+	"github.com/sagernet/sing/common/atomic"
+	"github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/sing/common/bufio"
+	E "github.com/sagernet/sing/common/exceptions"
+	N "github.com/sagernet/sing/common/network"
+
+	"golang.org/x/net/http2"
+)
+
+const idleTimeout = 30 * time.Second
+
+var _ abstractSession = (*H2MuxServerSession)(nil)
+
+type H2MuxServerSession struct {
+	server  http2.Server
+	active  atomic.Int32
+	conn    net.Conn
+	inbound chan net.Conn
+	done    chan struct{}
+}
+
+func NewH2MuxServer(conn net.Conn) *H2MuxServerSession {
+	session := &H2MuxServerSession{
+		conn:    conn,
+		inbound: make(chan net.Conn),
+		done:    make(chan struct{}),
+		server: http2.Server{
+			IdleTimeout: idleTimeout,
+		},
+	}
+	go func() {
+		session.server.ServeConn(conn, &http2.ServeConnOpts{
+			Handler: session,
+		})
+		_ = session.Close()
+	}()
+	return session
+}
+
+func (s *H2MuxServerSession) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
+	s.active.Add(1)
+	defer s.active.Add(-1)
+	writer.WriteHeader(http.StatusOK)
+	conn := newHTTP2Wrapper(&v2rayhttp.ServerHTTPConn{
+		HTTP2Conn: v2rayhttp.NewHTTPConn(request.Body, writer),
+		Flusher:   writer.(http.Flusher),
+	})
+	s.inbound <- conn
+	select {
+	case <-conn.done:
+	case <-s.done:
+	}
+}
+
+func (s *H2MuxServerSession) Open() (net.Conn, error) {
+	return nil, os.ErrInvalid
+}
+
+func (s *H2MuxServerSession) Accept() (net.Conn, error) {
+	select {
+	case conn := <-s.inbound:
+		return conn, nil
+	case <-s.done:
+		return nil, os.ErrClosed
+	}
+}
+
+func (s *H2MuxServerSession) NumStreams() int {
+	return int(s.active.Load())
+}
+
+func (s *H2MuxServerSession) Close() error {
+	select {
+	case <-s.done:
+	default:
+		close(s.done)
+	}
+	return s.conn.Close()
+}
+
+func (s *H2MuxServerSession) IsClosed() bool {
+	select {
+	case <-s.done:
+		return true
+	default:
+		return false
+	}
+}
+
+func (s *H2MuxServerSession) CanTakeNewRequest() bool {
+	return false
+}
+
+type h2MuxConnWrapper struct {
+	N.ExtendedConn
+	done chan struct{}
+}
+
+func newHTTP2Wrapper(conn net.Conn) *h2MuxConnWrapper {
+	return &h2MuxConnWrapper{
+		ExtendedConn: bufio.NewExtendedConn(conn),
+		done:         make(chan struct{}),
+	}
+}
+
+func (w *h2MuxConnWrapper) Write(p []byte) (n int, err error) {
+	select {
+	case <-w.done:
+		return 0, net.ErrClosed
+	default:
+	}
+	return w.ExtendedConn.Write(p)
+}
+
+func (w *h2MuxConnWrapper) WriteBuffer(buffer *buf.Buffer) error {
+	select {
+	case <-w.done:
+		return net.ErrClosed
+	default:
+	}
+	return w.ExtendedConn.WriteBuffer(buffer)
+}
+
+func (w *h2MuxConnWrapper) Close() error {
+	select {
+	case <-w.done:
+	default:
+		close(w.done)
+	}
+	return w.ExtendedConn.Close()
+}
+
+func (w *h2MuxConnWrapper) Upstream() any {
+	return w.ExtendedConn
+}
+
+var _ abstractSession = (*H2MuxClientSession)(nil)
+
+type H2MuxClientSession struct {
+	transport  *http2.Transport
+	clientConn *http2.ClientConn
+	done       chan struct{}
+}
+
+func NewH2MuxClient(conn net.Conn) (*H2MuxClientSession, error) {
+	session := &H2MuxClientSession{
+		transport: &http2.Transport{
+			DialTLSContext: func(ctx context.Context, network, addr string, cfg *tls.Config) (net.Conn, error) {
+				return conn, nil
+			},
+			ReadIdleTimeout: idleTimeout,
+		},
+		done: make(chan struct{}),
+	}
+	session.transport.ConnPool = session
+	clientConn, err := session.transport.NewClientConn(conn)
+	if err != nil {
+		return nil, err
+	}
+	session.clientConn = clientConn
+	return session, nil
+}
+
+func (s *H2MuxClientSession) GetClientConn(req *http.Request, addr string) (*http2.ClientConn, error) {
+	return s.clientConn, nil
+}
+
+func (s *H2MuxClientSession) MarkDead(conn *http2.ClientConn) {
+	s.Close()
+}
+
+func (s *H2MuxClientSession) Open() (net.Conn, error) {
+	pipeInReader, pipeInWriter := io.Pipe()
+	request := &http.Request{
+		Method: http.MethodConnect,
+		Body:   pipeInReader,
+		URL:    &url.URL{Scheme: "https", Host: "localhost"},
+	}
+	conn := v2rayhttp.NewLateHTTPConn(pipeInWriter)
+	go func() {
+		response, err := s.transport.RoundTrip(request)
+		if err != nil {
+			conn.Setup(nil, err)
+		} else if response.StatusCode != 200 {
+			response.Body.Close()
+			conn.Setup(nil, E.New("unexpected status: ", response.StatusCode, " ", response.Status))
+		} else {
+			conn.Setup(response.Body, nil)
+		}
+	}()
+	return conn, nil
+}
+
+func (s *H2MuxClientSession) Accept() (net.Conn, error) {
+	return nil, os.ErrInvalid
+}
+
+func (s *H2MuxClientSession) NumStreams() int {
+	return s.clientConn.State().StreamsActive
+}
+
+func (s *H2MuxClientSession) Close() error {
+	select {
+	case <-s.done:
+	default:
+		close(s.done)
+	}
+	return s.clientConn.Close()
+}
+
+func (s *H2MuxClientSession) IsClosed() bool {
+	select {
+	case <-s.done:
+		return true
+	default:
+	}
+	return s.clientConn.State().Closed
+}
+
+func (s *H2MuxClientSession) CanTakeNewRequest() bool {
+	return s.clientConn.CanTakeNewRequest()
+}

common/mux/padding.go

@@ -0,0 +1,240 @@
+package mux
+
+import (
+	"encoding/binary"
+	"io"
+	"math/rand"
+	"net"
+
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/sing/common/bufio"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/rw"
+)
+
+const kFirstPaddings = 16
+
+type paddingConn struct {
+	N.ExtendedConn
+	writer           N.VectorisedWriter
+	readPadding      int
+	writePadding     int
+	readRemaining    int
+	paddingRemaining int
+}
+
+func newPaddingConn(conn net.Conn) net.Conn {
+	writer, isVectorised := bufio.CreateVectorisedWriter(conn)
+	if isVectorised {
+		return &vectorisedPaddingConn{
+			paddingConn{
+				ExtendedConn: bufio.NewExtendedConn(conn),
+				writer:       bufio.NewVectorisedWriter(conn),
+			},
+			writer,
+		}
+	} else {
+		return &paddingConn{
+			ExtendedConn: bufio.NewExtendedConn(conn),
+			writer:       bufio.NewVectorisedWriter(conn),
+		}
+	}
+}
+
+func (c *paddingConn) Read(p []byte) (n int, err error) {
+	if c.readRemaining > 0 {
+		if len(p) > c.readRemaining {
+			p = p[:c.readRemaining]
+		}
+		n, err = c.ExtendedConn.Read(p)
+		if err != nil {
+			return
+		}
+		c.readRemaining -= n
+		return
+	}
+	if c.paddingRemaining > 0 {
+		err = rw.SkipN(c.ExtendedConn, c.paddingRemaining)
+		if err != nil {
+			return
+		}
+		c.paddingRemaining = 0
+	}
+	if c.readPadding < kFirstPaddings {
+		var paddingHdr []byte
+		if len(p) >= 4 {
+			paddingHdr = p[:4]
+		} else {
+			_paddingHdr := make([]byte, 4)
+			defer common.KeepAlive(_paddingHdr)
+			paddingHdr = common.Dup(_paddingHdr)
+		}
+		_, err = io.ReadFull(c.ExtendedConn, paddingHdr)
+		if err != nil {
+			return
+		}
+		originalDataSize := int(binary.BigEndian.Uint16(paddingHdr[:2]))
+		paddingLen := int(binary.BigEndian.Uint16(paddingHdr[2:]))
+		if len(p) > originalDataSize {
+			p = p[:originalDataSize]
+		}
+		n, err = c.ExtendedConn.Read(p)
+		if err != nil {
+			return
+		}
+		c.readPadding++
+		c.readRemaining = originalDataSize - n
+		c.paddingRemaining = paddingLen
+		return
+	}
+	return c.ExtendedConn.Read(p)
+}
+
+func (c *paddingConn) Write(p []byte) (n int, err error) {
+	for pLen := len(p); pLen > 0; {
+		var data []byte
+		if pLen > 65535 {
+			data = p[:65535]
+			p = p[65535:]
+			pLen -= 65535
+		} else {
+			data = p
+			pLen = 0
+		}
+		var writeN int
+		writeN, err = c.write(data)
+		n += writeN
+		if err != nil {
+			break
+		}
+	}
+	return n, err
+}
+
+func (c *paddingConn) write(p []byte) (n int, err error) {
+	if c.writePadding < kFirstPaddings {
+		paddingLen := 256 + rand.Intn(512)
+		_buffer := buf.StackNewSize(4 + len(p) + paddingLen)
+		defer common.KeepAlive(_buffer)
+		buffer := common.Dup(_buffer)
+		defer buffer.Release()
+		header := buffer.Extend(4)
+		binary.BigEndian.PutUint16(header[:2], uint16(len(p)))
+		binary.BigEndian.PutUint16(header[2:], uint16(paddingLen))
+		common.Must1(buffer.Write(p))
+		buffer.Extend(paddingLen)
+		_, err = c.ExtendedConn.Write(buffer.Bytes())
+		if err == nil {
+			n = len(p)
+		}
+		c.writePadding++
+		return
+	}
+	return c.ExtendedConn.Write(p)
+}
+
+func (c *paddingConn) ReadBuffer(buffer *buf.Buffer) error {
+	p := buffer.FreeBytes()
+	if c.readRemaining > 0 {
+		if len(p) > c.readRemaining {
+			p = p[:c.readRemaining]
+		}
+		n, err := c.ExtendedConn.Read(p)
+		if err != nil {
+			return err
+		}
+		c.readRemaining -= n
+		buffer.Truncate(n)
+		return nil
+	}
+	if c.paddingRemaining > 0 {
+		err := rw.SkipN(c.ExtendedConn, c.paddingRemaining)
+		if err != nil {
+			return err
+		}
+		c.paddingRemaining = 0
+	}
+	if c.readPadding < kFirstPaddings {
+		var paddingHdr []byte
+		if len(p) >= 4 {
+			paddingHdr = p[:4]
+		} else {
+			_paddingHdr := make([]byte, 4)
+			defer common.KeepAlive(_paddingHdr)
+			paddingHdr = common.Dup(_paddingHdr)
+		}
+		_, err := io.ReadFull(c.ExtendedConn, paddingHdr)
+		if err != nil {
+			return err
+		}
+		originalDataSize := int(binary.BigEndian.Uint16(paddingHdr[:2]))
+		paddingLen := int(binary.BigEndian.Uint16(paddingHdr[2:]))
+
+		if len(p) > originalDataSize {
+			p = p[:originalDataSize]
+		}
+		n, err := c.ExtendedConn.Read(p)
+		if err != nil {
+			return err
+		}
+		c.readPadding++
+		c.readRemaining = originalDataSize - n
+		c.paddingRemaining = paddingLen
+		buffer.Truncate(n)
+		return nil
+	}
+	return c.ExtendedConn.ReadBuffer(buffer)
+}
+
+func (c *paddingConn) WriteBuffer(buffer *buf.Buffer) error {
+	if c.writePadding < kFirstPaddings {
+		bufferLen := buffer.Len()
+		if bufferLen > 65535 {
+			return common.Error(c.Write(buffer.Bytes()))
+		}
+		paddingLen := 256 + rand.Intn(512)
+		header := buffer.ExtendHeader(4)
+		binary.BigEndian.PutUint16(header[:2], uint16(bufferLen))
+		binary.BigEndian.PutUint16(header[2:], uint16(paddingLen))
+		buffer.Extend(paddingLen)
+		c.writePadding++
+	}
+	return c.ExtendedConn.WriteBuffer(buffer)
+}
+
+func (c *paddingConn) FrontHeadroom() int {
+	return 4 + 256 + 1024
+}
+
+type vectorisedPaddingConn struct {
+	paddingConn
+	writer N.VectorisedWriter
+}
+
+func (c *vectorisedPaddingConn) WriteVectorised(buffers []*buf.Buffer) error {
+	if c.writePadding < kFirstPaddings {
+		bufferLen := buf.LenMulti(buffers)
+		if bufferLen > 65535 {
+			defer buf.ReleaseMulti(buffers)
+			for _, buffer := range buffers {
+				_, err := c.Write(buffer.Bytes())
+				if err != nil {
+					return err
+				}
+			}
+			return nil
+		}
+		paddingLen := 256 + rand.Intn(512)
+		header := buf.NewSize(4)
+		common.Must(
+			binary.Write(header, binary.BigEndian, uint16(bufferLen)),
+			binary.Write(header, binary.BigEndian, uint16(paddingLen)),
+		)
+		c.writePadding++
+		padding := buf.NewSize(paddingLen)
+		padding.Extend(paddingLen)
+		buffers = append(append([]*buf.Buffer{header}, buffers...), padding)
+	}
+	return c.writer.WriteVectorised(buffers)
+}

common/mux/protocol.go

@@ -1,14 +1,299 @@
 package mux
 
 import (
-	"github.com/sagernet/sing-mux"
+	"encoding/binary"
+	"io"
+	"math/rand"
+	"net"
+
+	C "github.com/sagernet/sing-box/constant"
+	"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"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/rw"
+	"github.com/sagernet/smux"
+
+	"github.com/hashicorp/yamux"
 )
 
-type (
-	Client = mux.Client
+var Destination = M.Socksaddr{
+	Fqdn: "sp.mux.sing-box.arpa",
+	Port: 444,
+}
+
+const (
+	ProtocolSMux Protocol = iota
+	ProtocolYAMux
+	ProtocolH2Mux
 )
 
-var (
-	Destination      = mux.Destination
-	HandleConnection = mux.HandleConnection
+type Protocol byte
+
+func ParseProtocol(name string) (Protocol, error) {
+	switch name {
+	case "", "smux":
+		return ProtocolSMux, nil
+	case "yamux":
+		return ProtocolYAMux, nil
+	case "h2mux":
+		return ProtocolH2Mux, nil
+	default:
+		return ProtocolSMux, E.New("unknown multiplex protocol: ", name)
+	}
+}
+
+func (p Protocol) newServer(conn net.Conn) (abstractSession, error) {
+	switch p {
+	case ProtocolSMux:
+		session, err := smux.Server(conn, smuxConfig())
+		if err != nil {
+			return nil, err
+		}
+		return &smuxSession{session}, nil
+	case ProtocolYAMux:
+		session, err := yamux.Server(conn, yaMuxConfig())
+		if err != nil {
+			return nil, err
+		}
+		return &yamuxSession{session}, nil
+	case ProtocolH2Mux:
+		return NewH2MuxServer(conn), nil
+	default:
+		panic("unknown protocol")
+	}
+}
+
+func (p Protocol) newClient(conn net.Conn) (abstractSession, error) {
+	switch p {
+	case ProtocolSMux:
+		session, err := smux.Client(conn, smuxConfig())
+		if err != nil {
+			return nil, err
+		}
+		return &smuxSession{session}, nil
+	case ProtocolYAMux:
+		session, err := yamux.Client(conn, yaMuxConfig())
+		if err != nil {
+			return nil, err
+		}
+		return &yamuxSession{session}, nil
+	case ProtocolH2Mux:
+		return NewH2MuxClient(conn)
+	default:
+		panic("unknown protocol")
+	}
+}
+
+func smuxConfig() *smux.Config {
+	config := smux.DefaultConfig()
+	config.KeepAliveDisabled = true
+	return config
+}
+
+func yaMuxConfig() *yamux.Config {
+	config := yamux.DefaultConfig()
+	config.LogOutput = io.Discard
+	config.StreamCloseTimeout = C.TCPTimeout
+	config.StreamOpenTimeout = C.TCPTimeout
+	return config
+}
+
+func (p Protocol) String() string {
+	switch p {
+	case ProtocolSMux:
+		return "smux"
+	case ProtocolYAMux:
+		return "yamux"
+	case ProtocolH2Mux:
+		return "h2mux"
+	default:
+		return "unknown"
+	}
+}
+
+const (
+	Version0 = iota
+	Version1
 )
+
+type Request struct {
+	Version        byte
+	Protocol       Protocol
+	PaddingEnabled bool
+}
+
+func ReadRequest(reader io.Reader) (*Request, error) {
+	version, err := rw.ReadByte(reader)
+	if err != nil {
+		return nil, err
+	}
+	if version < Version0 || version > Version1 {
+		return nil, E.New("unsupported version: ", version)
+	}
+	protocol, err := rw.ReadByte(reader)
+	if err != nil {
+		return nil, err
+	}
+	var paddingEnabled bool
+	if version == Version1 {
+		err = binary.Read(reader, binary.BigEndian, &paddingEnabled)
+		if err != nil {
+			return nil, err
+		}
+		if paddingEnabled {
+			var paddingLen uint16
+			err = binary.Read(reader, binary.BigEndian, &paddingLen)
+			if err != nil {
+				return nil, err
+			}
+			err = rw.SkipN(reader, int(paddingLen))
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+	return &Request{Version: version, Protocol: Protocol(protocol), PaddingEnabled: paddingEnabled}, nil
+}
+
+func EncodeRequest(request Request, payload []byte) *buf.Buffer {
+	var requestLen int
+	requestLen += 2
+	var paddingLen uint16
+	if request.Version == Version1 {
+		requestLen += 1
+		if request.PaddingEnabled {
+			requestLen += 2
+			paddingLen = uint16(256 + rand.Intn(512))
+			requestLen += int(paddingLen)
+		}
+	}
+	buffer := buf.NewSize(requestLen + len(payload))
+	common.Must(
+		buffer.WriteByte(request.Version),
+		buffer.WriteByte(byte(request.Protocol)),
+	)
+	if request.Version == Version1 {
+		common.Must(binary.Write(buffer, binary.BigEndian, request.PaddingEnabled))
+		if request.PaddingEnabled {
+			common.Must(binary.Write(buffer, binary.BigEndian, paddingLen))
+			buffer.Extend(int(paddingLen))
+		}
+	}
+	common.Must1(buffer.Write(payload))
+	return buffer
+}
+
+const (
+	flagUDP       = 1
+	flagAddr      = 2
+	statusSuccess = 0
+	statusError   = 1
+)
+
+type StreamRequest struct {
+	Network     string
+	Destination M.Socksaddr
+	PacketAddr  bool
+}
+
+func ReadStreamRequest(reader io.Reader) (*StreamRequest, error) {
+	var flags uint16
+	err := binary.Read(reader, binary.BigEndian, &flags)
+	if err != nil {
+		return nil, err
+	}
+	destination, err := M.SocksaddrSerializer.ReadAddrPort(reader)
+	if err != nil {
+		return nil, err
+	}
+	var network string
+	var udpAddr bool
+	if flags&flagUDP == 0 {
+		network = N.NetworkTCP
+	} else {
+		network = N.NetworkUDP
+		udpAddr = flags&flagAddr != 0
+	}
+	return &StreamRequest{network, destination, udpAddr}, nil
+}
+
+func streamRequestLen(request StreamRequest) int {
+	var rLen int
+	rLen += 1 // version
+	rLen += 2 // flags
+	rLen += M.SocksaddrSerializer.AddrPortLen(request.Destination)
+	return rLen
+}
+
+func EncodeStreamRequest(request StreamRequest, buffer *buf.Buffer) {
+	destination := request.Destination
+	var flags uint16
+	if request.Network == N.NetworkUDP {
+		flags |= flagUDP
+	}
+	if request.PacketAddr {
+		flags |= flagAddr
+		if !destination.IsValid() {
+			destination = Destination
+		}
+	}
+	common.Must(
+		binary.Write(buffer, binary.BigEndian, flags),
+		M.SocksaddrSerializer.WriteAddrPort(buffer, destination),
+	)
+}
+
+type StreamResponse struct {
+	Status  uint8
+	Message string
+}
+
+func ReadStreamResponse(reader io.Reader) (*StreamResponse, error) {
+	var response StreamResponse
+	status, err := rw.ReadByte(reader)
+	if err != nil {
+		return nil, err
+	}
+	response.Status = status
+	if status == statusError {
+		response.Message, err = rw.ReadVString(reader)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return &response, nil
+}
+
+type wrapStream struct {
+	net.Conn
+}
+
+func (w *wrapStream) Read(p []byte) (n int, err error) {
+	n, err = w.Conn.Read(p)
+	err = wrapError(err)
+	return
+}
+
+func (w *wrapStream) Write(p []byte) (n int, err error) {
+	n, err = w.Conn.Write(p)
+	err = wrapError(err)
+	return
+}
+
+func (w *wrapStream) WriteIsThreadUnsafe() {
+}
+
+func (w *wrapStream) Upstream() any {
+	return w.Conn
+}
+
+func wrapError(err error) error {
+	switch err {
+	case yamux.ErrStreamClosed:
+		return io.EOF
+	default:
+		return err
+	}
+}

common/mux/service.go

@@ -0,0 +1,272 @@
+package mux
+
+import (
+	"context"
+	"encoding/binary"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/sing/common/bufio"
+	E "github.com/sagernet/sing/common/exceptions"
+	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 {
+	request, err := ReadRequest(conn)
+	if err != nil {
+		return err
+	}
+	if request.PaddingEnabled {
+		conn = newPaddingConn(conn)
+	}
+	session, err := request.Protocol.newServer(conn)
+	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)
+		}
+	})
+	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) {
+	stream = &wrapStream{stream}
+	request, err := ReadStreamRequest(stream)
+	if err != nil {
+		logger.ErrorContext(ctx, err)
+		return
+	}
+	metadata.Destination = request.Destination
+	if request.Network == N.NetworkTCP {
+		logger.InfoContext(ctx, "inbound multiplex connection to ", metadata.Destination)
+		hErr := router.RouteConnection(ctx, &ServerConn{ExtendedConn: bufio.NewExtendedConn(stream)}, metadata)
+		stream.Close()
+		if hErr != nil {
+			errorHandler.NewError(ctx, hErr)
+		}
+	} else {
+		var packetConn N.PacketConn
+		if !request.PacketAddr {
+			logger.InfoContext(ctx, "inbound multiplex packet connection to ", metadata.Destination)
+			packetConn = &ServerPacketConn{ExtendedConn: bufio.NewExtendedConn(stream), destination: request.Destination}
+		} else {
+			logger.InfoContext(ctx, "inbound multiplex packet connection")
+			packetConn = &ServerPacketAddrConn{ExtendedConn: bufio.NewExtendedConn(stream)}
+		}
+		hErr := router.RoutePacketConnection(ctx, packetConn, metadata)
+		stream.Close()
+		if hErr != nil {
+			errorHandler.NewError(ctx, hErr)
+		}
+	}
+}
+
+var _ N.HandshakeConn = (*ServerConn)(nil)
+
+type ServerConn struct {
+	N.ExtendedConn
+	responseWrite bool
+}
+
+func (c *ServerConn) HandshakeFailure(err error) error {
+	errMessage := err.Error()
+	_buffer := buf.StackNewSize(1 + rw.UVariantLen(uint64(len(errMessage))) + len(errMessage))
+	defer common.KeepAlive(_buffer)
+	buffer := common.Dup(_buffer)
+	defer buffer.Release()
+	common.Must(
+		buffer.WriteByte(statusError),
+		rw.WriteVString(_buffer, errMessage),
+	)
+	return c.ExtendedConn.WriteBuffer(buffer)
+}
+
+func (c *ServerConn) Write(b []byte) (n int, err error) {
+	if c.responseWrite {
+		return c.ExtendedConn.Write(b)
+	}
+	_buffer := buf.StackNewSize(1 + len(b))
+	defer common.KeepAlive(_buffer)
+	buffer := common.Dup(_buffer)
+	defer buffer.Release()
+	common.Must(
+		buffer.WriteByte(statusSuccess),
+		common.Error(buffer.Write(b)),
+	)
+	_, err = c.ExtendedConn.Write(buffer.Bytes())
+	if err != nil {
+		return
+	}
+	c.responseWrite = true
+	return len(b), nil
+}
+
+func (c *ServerConn) WriteBuffer(buffer *buf.Buffer) error {
+	if c.responseWrite {
+		return c.ExtendedConn.WriteBuffer(buffer)
+	}
+	buffer.ExtendHeader(1)[0] = statusSuccess
+	c.responseWrite = true
+	return c.ExtendedConn.WriteBuffer(buffer)
+}
+
+func (c *ServerConn) FrontHeadroom() int {
+	if !c.responseWrite {
+		return 1
+	}
+	return 0
+}
+
+func (c *ServerConn) NeedAdditionalReadDeadline() bool {
+	return true
+}
+
+func (c *ServerConn) Upstream() any {
+	return c.ExtendedConn
+}
+
+var (
+	_ N.HandshakeConn = (*ServerPacketConn)(nil)
+	_ N.PacketConn    = (*ServerPacketConn)(nil)
+)
+
+type ServerPacketConn struct {
+	N.ExtendedConn
+	destination   M.Socksaddr
+	responseWrite bool
+}
+
+func (c *ServerPacketConn) HandshakeFailure(err error) error {
+	errMessage := err.Error()
+	_buffer := buf.StackNewSize(1 + rw.UVariantLen(uint64(len(errMessage))) + len(errMessage))
+	defer common.KeepAlive(_buffer)
+	buffer := common.Dup(_buffer)
+	defer buffer.Release()
+	common.Must(
+		buffer.WriteByte(statusError),
+		rw.WriteVString(_buffer, errMessage),
+	)
+	return c.ExtendedConn.WriteBuffer(buffer)
+}
+
+func (c *ServerPacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
+	var length uint16
+	err = binary.Read(c.ExtendedConn, binary.BigEndian, &length)
+	if err != nil {
+		return
+	}
+	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
+	if err != nil {
+		return
+	}
+	destination = c.destination
+	return
+}
+
+func (c *ServerPacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
+	pLen := buffer.Len()
+	common.Must(binary.Write(buf.With(buffer.ExtendHeader(2)), binary.BigEndian, uint16(pLen)))
+	if !c.responseWrite {
+		buffer.ExtendHeader(1)[0] = statusSuccess
+		c.responseWrite = true
+	}
+	return c.ExtendedConn.WriteBuffer(buffer)
+}
+
+func (c *ServerPacketConn) NeedAdditionalReadDeadline() bool {
+	return true
+}
+
+func (c *ServerPacketConn) Upstream() any {
+	return c.ExtendedConn
+}
+
+func (c *ServerPacketConn) FrontHeadroom() int {
+	if !c.responseWrite {
+		return 3
+	}
+	return 2
+}
+
+var (
+	_ N.HandshakeConn = (*ServerPacketAddrConn)(nil)
+	_ N.PacketConn    = (*ServerPacketAddrConn)(nil)
+)
+
+type ServerPacketAddrConn struct {
+	N.ExtendedConn
+	responseWrite bool
+}
+
+func (c *ServerPacketAddrConn) HandshakeFailure(err error) error {
+	errMessage := err.Error()
+	_buffer := buf.StackNewSize(1 + rw.UVariantLen(uint64(len(errMessage))) + len(errMessage))
+	defer common.KeepAlive(_buffer)
+	buffer := common.Dup(_buffer)
+	defer buffer.Release()
+	common.Must(
+		buffer.WriteByte(statusError),
+		rw.WriteVString(_buffer, errMessage),
+	)
+	return c.ExtendedConn.WriteBuffer(buffer)
+}
+
+func (c *ServerPacketAddrConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
+	destination, err = M.SocksaddrSerializer.ReadAddrPort(c.ExtendedConn)
+	if err != nil {
+		return
+	}
+	var length uint16
+	err = binary.Read(c.ExtendedConn, binary.BigEndian, &length)
+	if err != nil {
+		return
+	}
+	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
+	if err != nil {
+		return
+	}
+	return
+}
+
+func (c *ServerPacketAddrConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
+	pLen := buffer.Len()
+	common.Must(binary.Write(buf.With(buffer.ExtendHeader(2)), binary.BigEndian, uint16(pLen)))
+	common.Must(M.SocksaddrSerializer.WriteAddrPort(buf.With(buffer.ExtendHeader(M.SocksaddrSerializer.AddrPortLen(destination))), destination))
+	if !c.responseWrite {
+		buffer.ExtendHeader(1)[0] = statusSuccess
+		c.responseWrite = true
+	}
+	return c.ExtendedConn.WriteBuffer(buffer)
+}
+
+func (c *ServerPacketAddrConn) NeedAdditionalReadDeadline() bool {
+	return true
+}
+
+func (c *ServerPacketAddrConn) Upstream() any {
+	return c.ExtendedConn
+}
+
+func (c *ServerPacketAddrConn) FrontHeadroom() int {
+	if !c.responseWrite {
+		return 3 + M.MaxSocksaddrLength
+	}
+	return 2 + M.MaxSocksaddrLength
+}

common/mux/session.go

@@ -0,0 +1,111 @@
+package mux
+
+import (
+	"io"
+	"net"
+
+	"github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/sing/common/bufio"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/smux"
+
+	"github.com/hashicorp/yamux"
+)
+
+type abstractSession interface {
+	Open() (net.Conn, error)
+	Accept() (net.Conn, error)
+	NumStreams() int
+	Close() error
+	IsClosed() bool
+	CanTakeNewRequest() bool
+}
+
+var _ abstractSession = (*smuxSession)(nil)
+
+type smuxSession struct {
+	*smux.Session
+}
+
+func (s *smuxSession) Open() (net.Conn, error) {
+	return s.OpenStream()
+}
+
+func (s *smuxSession) Accept() (net.Conn, error) {
+	return s.AcceptStream()
+}
+
+func (s *smuxSession) CanTakeNewRequest() bool {
+	return true
+}
+
+type yamuxSession struct {
+	*yamux.Session
+}
+
+func (y *yamuxSession) CanTakeNewRequest() bool {
+	return true
+}
+
+type protocolConn struct {
+	net.Conn
+	request         Request
+	protocolWritten bool
+}
+
+func newProtocolConn(conn net.Conn, request Request) net.Conn {
+	writer, isVectorised := bufio.CreateVectorisedWriter(conn)
+	if isVectorised {
+		return &vectorisedProtocolConn{
+			protocolConn{
+				Conn:    conn,
+				request: request,
+			},
+			writer,
+		}
+	} else {
+		return &protocolConn{
+			Conn:    conn,
+			request: request,
+		}
+	}
+}
+
+func (c *protocolConn) Write(p []byte) (n int, err error) {
+	if c.protocolWritten {
+		return c.Conn.Write(p)
+	}
+	buffer := EncodeRequest(c.request, p)
+	n, err = c.Conn.Write(buffer.Bytes())
+	buffer.Release()
+	if err == nil {
+		n--
+	}
+	c.protocolWritten = true
+	return n, err
+}
+
+func (c *protocolConn) ReadFrom(r io.Reader) (n int64, err error) {
+	if !c.protocolWritten {
+		return bufio.ReadFrom0(c, r)
+	}
+	return bufio.Copy(c.Conn, r)
+}
+
+func (c *protocolConn) Upstream() any {
+	return c.Conn
+}
+
+type vectorisedProtocolConn struct {
+	protocolConn
+	writer N.VectorisedWriter
+}
+
+func (c *vectorisedProtocolConn) WriteVectorised(buffers []*buf.Buffer) error {
+	if c.protocolWritten {
+		return c.writer.WriteVectorised(buffers)
+	}
+	c.protocolWritten = true
+	buffer := EncodeRequest(c.request, nil)
+	return c.writer.WriteVectorised(append([]*buf.Buffer{buffer}, buffers...))
+}

common/tls/reality_client.go

@@ -111,16 +111,6 @@ func (e *RealityClientConfig) ClientHandshake(ctx context.Context, conn net.Conn
 	if err != nil {
 		return nil, err
 	}
-
-	if len(uConfig.NextProtos) > 0 {
-		for _, extension := range uConn.Extensions {
-			if alpnExtension, isALPN := extension.(*utls.ALPNExtension); isALPN {
-				alpnExtension.AlpnProtocols = uConfig.NextProtos
-				break
-			}
-		}
-	}
-
 	hello := uConn.HandshakeState.Hello
 	hello.SessionId = make([]byte, 32)
 	copy(hello.Raw[39:], hello.SessionId)

common/tls/utls_client.go

@@ -3,7 +3,6 @@
 package tls
 
 import (
-	"context"
 	"crypto/tls"
 	"crypto/x509"
 	"math/rand"
@@ -48,7 +47,7 @@ func (e *UTLSClientConfig) Config() (*STDConfig, error) {
 }
 
 func (e *UTLSClientConfig) Client(conn net.Conn) (Conn, error) {
-	return &utlsALPNWrapper{utlsConnWrapper{utls.UClient(conn, e.config.Clone(), e.id)}, e.config.NextProtos}, nil
+	return &utlsConnWrapper{utls.UClient(conn, e.config.Clone(), e.id)}, nil
 }
 
 func (e *UTLSClientConfig) SetSessionIDGenerator(generator func(clientHello []byte, sessionID []byte) error) {
@@ -88,31 +87,6 @@ func (c *utlsConnWrapper) Upstream() any {
 	return c.UConn
 }
 
-type utlsALPNWrapper struct {
-	utlsConnWrapper
-	nextProtocols []string
-}
-
-func (c *utlsALPNWrapper) HandshakeContext(ctx context.Context) error {
-	if len(c.nextProtocols) > 0 {
-		err := c.BuildHandshakeState()
-		if err != nil {
-			return err
-		}
-		for _, extension := range c.Extensions {
-			if alpnExtension, isALPN := extension.(*utls.ALPNExtension); isALPN {
-				alpnExtension.AlpnProtocols = c.nextProtocols
-				err = c.BuildHandshakeState()
-				if err != nil {
-					return err
-				}
-				break
-			}
-		}
-	}
-	return c.UConn.HandshakeContext(ctx)
-}
-
 func NewUTLSClient(router adapter.Router, serverAddress string, options option.OutboundTLSOptions) (*UTLSClientConfig, error) {
 	var serverName string
 	if options.ServerName != "" {

docs/changelog.md

@@ -1,95 +1,3 @@
-#### 1.3.0
-
-* Fix bugs and update dependencies
-
-Important changes since 1.2:
-
-* Add [FakeIP](/configuration/dns/fakeip) support **1**
-* Improve multiplex **2**
-* Add [DNS reverse mapping](/configuration/dns#reverse_mapping) support
-* Add `rewrite_ttl` DNS rule action
-* Add `store_fakeip` Clash API option
-* Add multi-peer support for [WireGuard](/configuration/outbound/wireguard#peers) outbound
-* Add loopback detect
-* Add Clash.Meta API compatibility for Clash API
-* Download Yacd-meta by default if the specified Clash `external_ui` directory is empty
-* Add path and headers option for HTTP outbound
-* Perform URLTest recheck after network changes
-* Fix `system` tun stack for ios
-* Fix network monitor for android/ios
-* Update VLESS and XUDP protocol
-* Make splice work with traffic statistics systems like Clash API
-* Significantly reduces memory usage of idle connections
-* Improve DNS caching
-* Add `independent_cache` [option](/configuration/dns#independent_cache) for DNS
-* Reimplemented shadowsocks client
-* Add multiplex support for VLESS outbound
-* Automatically add Windows firewall rules in order for the system tun stack to work
-* Fix TLS 1.2 support for shadow-tls client
-* Add `cache_id` [option](/configuration/experimental#cache_id) for Clash cache file
-* Fix `local` DNS transport for Android
-
-*1*:
-
-See [FAQ](/faq/fakeip) for more information.
-
-*2*:
-
-Added new `h2mux` multiplex protocol and `padding` multiplex option, see [Multiplex](/configuration/shared/multiplex).
-
-#### 1.3-rc2
-
-* Fix `local` DNS transport for Android
-* Fix bugs and update dependencies
-
-#### 1.3-rc1
-
-* Fix bugs and update dependencies
-
-#### 1.3-beta14
-
-* Fixes and improvements
-
-#### 1.3-beta13
-
-* Fix resolving fakeip domains  **1**
-* Deprecate L3 routing
-* Fix bugs and update dependencies
-
-**1**:
-
-If the destination address of the connection is obtained from fakeip, dns rules with server type fakeip will be skipped.
-
-#### 1.3-beta12
-
-* Automatically add Windows firewall rules in order for the system tun stack to work
-* Fix TLS 1.2 support for shadow-tls client
-* Add `cache_id` [option](/configuration/experimental#cache_id) for Clash cache file
-* Fixes and improvements
-
-#### 1.3-beta11
-
-* Fix bugs and update dependencies
-
-#### 1.3-beta10
-
-* Improve direct copy **1**
-* Improve DNS caching
-* Add `independent_cache` [option](/configuration/dns#independent_cache) for DNS
-* Reimplemented shadowsocks client **2**
-* Add multiplex support for VLESS outbound
-* Set TCP keepalive for WireGuard gVisor TCP connections
-* Fixes and improvements
-
-**1**:
-
-* Make splice work with traffic statistics systems like Clash API
-* Significantly reduces memory usage of idle connections
-
-**2**:
-
-Improved performance and reduced memory usage.
-
 #### 1.3-beta9
 
 * Improve multiplex **1**

docs/configuration/dns/index.md

@@ -11,7 +11,6 @@
     "strategy": "",
     "disable_cache": false,
     "disable_expire": false,
-    "independent_cache": false,
     "reverse_mapping": false,
     "fakeip": {}
   }
@@ -49,10 +48,6 @@ Disable dns cache.
 
 Disable dns cache expire.
 
-#### independent_cache
-
-Make each DNS server's cache independent for special purposes. If enabled, will slightly degrade performance.
-
 #### reverse_mapping
 
 Stores a reverse mapping of IP addresses after responding to a DNS query in order to provide domain names when routing.

docs/configuration/dns/index.zh.md

@@ -11,7 +11,6 @@
     "strategy": "",
     "disable_cache": false,
     "disable_expire": false,
-    "independent_cache": false,
     "reverse_mapping": false,
     "fakeip": {}
   }
@@ -48,10 +47,6 @@
 
 禁用 DNS 缓存过期。
 
-#### independent_cache
-
-使每个 DNS 服务器的缓存独立，以满足特殊目的。如果启用，将轻微降低性能。
-
 #### reverse_mapping
 
 在响应 DNS 查询后存储 IP 地址的反向映射以为路由目的提供域名。

docs/configuration/dns/server.md

@@ -30,18 +30,18 @@ The tag of the dns server.
 
 The address of the dns server.
 
-| Protocol                            | Format                        |
-|-------------------------------------|-------------------------------|
-| `System`                            | `local`                       |
-| `TCP`                               | `tcp://1.0.0.1`               |
-| `UDP`                               | `8.8.8.8` `udp://8.8.4.4`     |
-| `TLS`                               | `tls://dns.google`            |
-| `HTTPS`                             | `https://1.1.1.1/dns-query`   |
-| `QUIC`                              | `quic://dns.adguard.com`      |
-| `HTTP3`                             | `h3://8.8.8.8/dns-query`      |
-| `RCode`                             | `rcode://refused`             |
-| `DHCP`                              | `dhcp://auto` or `dhcp://en0` |
-| [FakeIP](/configuration/dns/fakeip) | `fakeip`                      |
+| Protocol            | Format                        |
+|---------------------|-------------------------------|
+| `System`            | `local`                       |
+| `TCP`               | `tcp://1.0.0.1`               |
+| `UDP`               | `8.8.8.8` `udp://8.8.4.4`     |
+| `TLS`               | `tls://dns.google`            |
+| `HTTPS`             | `https://1.1.1.1/dns-query`   |
+| `QUIC`              | `quic://dns.adguard.com`      |
+| `HTTP3`             | `h3://8.8.8.8/dns-query`      |
+| `RCode`             | `rcode://refused`             |
+| `DHCP`              | `dhcp://auto` or `dhcp://en0` |
+|  [FakeIP](./fakeip) | `fakeip`                      |
 
 !!! warning ""
 
@@ -94,4 +94,4 @@ Take no effect if override by other settings.
 
 Tag of an outbound for connecting to the dns server.
 
-Default outbound will be used if empty.
+Default outbound will be used if empty.

docs/configuration/dns/server.zh.md

@@ -30,18 +30,18 @@ DNS 服务器的标签。
 
 DNS 服务器的地址。
 
-| 协议                                  | 格式                           |
-|-------------------------------------|------------------------------|
-| `System`                            | `local`                      |
-| `TCP`                               | `tcp://1.0.0.1`              |
-| `UDP`                               | `8.8.8.8` `udp://8.8.4.4`    |
-| `TLS`                               | `tls://dns.google`           |
-| `HTTPS`                             | `https://1.1.1.1/dns-query`  |
-| `QUIC`                              | `quic://dns.adguard.com`     |
-| `HTTP3`                             | `h3://8.8.8.8/dns-query`     |
-| `RCode`                             | `rcode://refused`            |
-| `DHCP`                              | `dhcp://auto` 或 `dhcp://en0` |
-| [FakeIP](/configuration/dns/fakeip) | `fakeip`                     |
+| 协议                 | 格式                           |
+|--------------------|------------------------------|
+| `System`           | `local`                      |
+| `TCP`              | `tcp://1.0.0.1`              |
+| `UDP`              | `8.8.8.8` `udp://8.8.4.4`    |
+| `TLS`              | `tls://dns.google`           |
+| `HTTPS`            | `https://1.1.1.1/dns-query`  |
+| `QUIC`             | `quic://dns.adguard.com`     |
+| `HTTP3`            | `h3://8.8.8.8/dns-query`     |
+| `RCode`            | `rcode://refused`            |
+| `DHCP`             | `dhcp://auto` 或 `dhcp://en0` |
+| [FakeIP](./fakeip) | `fakeip`                     |
 
 !!! warning ""
 

docs/configuration/experimental/index.md

@@ -7,14 +7,13 @@
   "experimental": {
     "clash_api": {
       "external_controller": "127.0.0.1:9090",
-      "external_ui": "",
+      "external_ui": "folder",
       "external_ui_download_url": "",
       "external_ui_download_detour": "",
       "secret": "",
-      "default_mode": "",
+      "default_mode": "rule",
       "store_selected": false,
-      "cache_file": "",
-      "cache_id": ""
+      "cache_file": "cache.db"
     },
     "v2ray_api": {
       "listen": "127.0.0.1:8080",
@@ -92,12 +91,6 @@ Store selected outbound for the `Selector` outbound in cache file.
 
 Cache file path, `cache.db` will be used if empty.
 
-#### cache_id
-
-Cache ID.
-
-If not empty, `store_selected` will use a separate store keyed by it.
-
 ### V2Ray API Fields
 
 !!! error ""

docs/configuration/experimental/index.zh.md

@@ -7,14 +7,13 @@
   "experimental": {
     "clash_api": {
       "external_controller": "127.0.0.1:9090",
-      "external_ui": "",
+      "external_ui": "folder",
       "external_ui_download_url": "",
       "external_ui_download_detour": "",
       "secret": "",
-      "default_mode": "",
+      "default_mode": "rule",
       "store_selected": false,
-      "cache_file": "",
-      "cache_id": ""
+      "cache_file": "cache.db"
     },
     "v2ray_api": {
       "listen": "127.0.0.1:8080",
@@ -90,12 +89,6 @@ Clash 中的默认模式，默认使用 `rule`。
 
 缓存文件路径，默认使用`cache.db`。
 
-#### cache_id
-
-缓存 ID。
-
-如果不为空，`store_selected` 将会使用以此为键的独立存储。
-
 ### V2Ray API 字段
 
 !!! error ""

docs/configuration/route/index.md

@@ -7,6 +7,7 @@
   "route": {
     "geoip": {},
     "geosite": {},
+    "ip_rules": [],
     "rules": [],
     "final": "",
     "auto_detect_interface": false,
@@ -23,6 +24,7 @@
 |------------|------------------------------------|
 | `geoip`    | [GeoIP](./geoip)                   |
 | `geosite`  | [Geosite](./geosite)               |
+| `ip_rules` | List of [IP Route Rule](./ip-rule) |
 | `rules`    | List of [Route Rule](./rule)       |
 
 #### final

docs/configuration/shared/multiplex.md

@@ -31,7 +31,7 @@ Multiplex protocol.
 | yamux    | https://github.com/hashicorp/yamux |
 | h2mux    | https://golang.org/x/net/http2     |
 
-h2mux is used by default.
+SMux is used by default.
 
 #### max_connections
 

docs/configuration/shared/multiplex.zh.md

@@ -30,7 +30,7 @@
 | yamux | https://github.com/hashicorp/yamux |
 | h2mux | https://golang.org/x/net/http2     |
 
-默认使用 h2mux。
+默认使用 SMux。
 
 #### max_connections
 

docs/examples/fakeip.md

@@ -1,106 +0,0 @@
-```json
-{
-  "dns": {
-    "servers": [
-      {
-        "tag": "google",
-        "address": "tls://8.8.8.8"
-      },
-      {
-        "tag": "local",
-        "address": "223.5.5.5",
-        "detour": "direct"
-      },
-      {
-        "tag": "remote",
-        "address": "fakeip"
-      },
-      {
-        "tag": "block",
-        "address": "rcode://success"
-      }
-    ],
-    "rules": [
-      {
-        "geosite": "category-ads-all",
-        "server": "block",
-        "disable_cache": true
-      },
-      {
-        "outbound": "any",
-        "server": "local"
-      },
-      {
-        "geosite": "cn",
-        "server": "local"
-      },
-      {
-        "query_type": [
-          "A",
-          "AAAA"
-        ],
-        "server": "remote"
-      }
-    ],
-    "fakeip": {
-      "enabled": true,
-      "inet4_range": "198.18.0.0/15",
-      "inet6_range": "fc00::/18"
-    },
-    "independent_cache": true,
-    "strategy": "ipv4_only"
-  },
-  "inbounds": [
-    {
-      "type": "tun",
-      "inet4_address": "172.19.0.1/30",
-      "auto_route": true,
-      "sniff": true,
-      "domain_strategy": "ipv4_only" // remove this line if you want to resolve the domain remotely (if the server is not sing-box, UDP may not work due to wrong behavior).
-    }
-  ],
-  "outbounds": [
-    {
-      "type": "shadowsocks",
-      "tag": "proxy",
-      "server": "mydomain.com",
-      "server_port": 8080,
-      "method": "2022-blake3-aes-128-gcm",
-      "password": "8JCsPssfgS8tiRwiMlhARg=="
-    },
-    {
-      "type": "direct",
-      "tag": "direct"
-    },
-    {
-      "type": "block",
-      "tag": "block"
-    },
-    {
-      "type": "dns",
-      "tag": "dns-out"
-    }
-  ],
-  "route": {
-    "rules": [
-      {
-        "protocol": "dns",
-        "outbound": "dns-out"
-      },
-      {
-        "geosite": "cn",
-        "geoip": [
-          "private",
-          "cn"
-        ],
-        "outbound": "direct"
-      },
-      {
-        "geosite": "category-ads-all",
-        "outbound": "block"
-      }
-    ],
-    "auto_detect_interface": true
-  }
-}
-```

docs/examples/fakeip.zh.md

@@ -1,106 +0,0 @@
-```json
-{
-  "dns": {
-    "servers": [
-      {
-        "tag": "google",
-        "address": "tls://8.8.8.8"
-      },
-      {
-        "tag": "local",
-        "address": "223.5.5.5",
-        "detour": "direct"
-      },
-      {
-        "tag": "remote",
-        "address": "fakeip"
-      },
-      {
-        "tag": "block",
-        "address": "rcode://success"
-      }
-    ],
-    "rules": [
-      {
-        "geosite": "category-ads-all",
-        "server": "block",
-        "disable_cache": true
-      },
-      {
-        "outbound": "any",
-        "server": "local"
-      },
-      {
-        "geosite": "cn",
-        "server": "local"
-      },
-      {
-        "query_type": [
-          "A",
-          "AAAA"
-        ],
-        "server": "remote"
-      }
-    ],
-    "fakeip": {
-      "enabled": true,
-      "inet4_range": "198.18.0.0/15",
-      "inet6_range": "fc00::/18"
-    },
-    "independent_cache": true,
-    "strategy": "ipv4_only"
-  },
-  "inbounds": [
-    {
-      "type": "tun",
-      "inet4_address": "172.19.0.1/30",
-      "auto_route": true,
-      "sniff": true,
-      "domain_strategy": "ipv4_only" // 如果您想在远程解析域，删除此行 (如果服务器程序不为 sing-box，可能由于错误的行为导致 UDP 无法使用)。
-    }
-  ],
-  "outbounds": [
-    {
-      "type": "shadowsocks",
-      "tag": "proxy",
-      "server": "mydomain.com",
-      "server_port": 8080,
-      "method": "2022-blake3-aes-128-gcm",
-      "password": "8JCsPssfgS8tiRwiMlhARg=="
-    },
-    {
-      "type": "direct",
-      "tag": "direct"
-    },
-    {
-      "type": "block",
-      "tag": "block"
-    },
-    {
-      "type": "dns",
-      "tag": "dns-out"
-    }
-  ],
-  "route": {
-    "rules": [
-      {
-        "protocol": "dns",
-        "outbound": "dns-out"
-      },
-      {
-        "geosite": "cn",
-        "geoip": [
-          "private",
-          "cn"
-        ],
-        "outbound": "direct"
-      },
-      {
-        "geosite": "category-ads-all",
-        "outbound": "block"
-      }
-    ],
-    "auto_detect_interface": true
-  }
-}
-```

docs/examples/index.md

@@ -9,4 +9,3 @@ Configuration examples for sing-box.
 * [ShadowTLS](./shadowtls)
 * [Clash API](./clash-api)
 * [WireGuard Direct](./wireguard-direct)
-* [FakeIP](./fakeip)

docs/examples/index.zh.md

@@ -9,4 +9,3 @@ sing-box 的配置示例。
 * [ShadowTLS](./shadowtls)
 * [Clash API](./clash-api)
 * [WireGuard Direct](./wireguard-direct)
-* [FakeIP](./fakeip)

docs/faq/fakeip.md

@@ -5,7 +5,8 @@ responds to DNS requests with virtual results and restores mapping when acceptin
 
 #### Advantage
 
-*
+* Retrieve the requested domain in places like IP routing (L3) where traffic detection is not possible to assist with routing.
+* Decrease an RTT on the first TCP request to a domain (the most common reason).
 
 #### Limitation
 
@@ -14,6 +15,6 @@ responds to DNS requests with virtual results and restores mapping when acceptin
 
 #### Recommendation
 
-* Enable `dns.independent_cache` unless you always resolve FakeIP domains remotely.
+* Do not use if you do not need L3 routing.
 * If using tun, make sure FakeIP ranges is included in the tun's routes.
 * Enable `experimental.clash_api.store_fakeip` to persist FakeIP records, or use `dns.rules.rewrite_ttl` to avoid losing records after program restart in DNS cached environments.

docs/faq/fakeip.zh.md

@@ -4,7 +4,8 @@ FakeIP 是指同时劫持 DNS 和连接请求的程序中的一种行为。它
 
 #### 优点
 
-*
+* 在像 L3 路由这样无法进行流量探测的地方检索所请求的域名，以协助路由。
+* 减少对一个域的第一个 TCP 请求的 RTT（这是最常见的原因）。
 
 #### 限制
 
@@ -13,6 +14,6 @@ FakeIP 是指同时劫持 DNS 和连接请求的程序中的一种行为。它
 
 #### 建议
 
-* 启用 `dns.independent_cache` 除非您始终远程解析 FakeIP 域。
+* 如果不需要 L3 路由，请勿使用。
 * 如果使用 tun，请确保 tun 路由中包含 FakeIP 地址范围。
 * 启用 `experimental.clash_api.store_fakeip` 以持久化 FakeIP 记录，或者使用 `dns.rules.rewrite_ttl` 避免程序重启后在 DNS 被缓存的环境中丢失记录。

docs/installation/clients/sfi.md

@@ -13,7 +13,7 @@ Experimental iOS client for sing-box.
 
 #### Note
 
-* User Agent in remote profile request is `SFI/$version ($version_code; sing-box $sing_box_version)`
+* User Agent in remote profile request is `SFA/$version ($version_code; sing-box $sing_box_version)`
 * Crash logs is located in `Settings` -> `View Service Log`
 
 #### Privacy policy

experimental/clashapi/cachefile/cache.go

@@ -14,11 +14,10 @@ var bucketSelected = []byte("selected")
 var _ adapter.ClashCacheFile = (*CacheFile)(nil)
 
 type CacheFile struct {
-	DB      *bbolt.DB
-	cacheID []byte
+	DB *bbolt.DB
 }
 
-func Open(path string, cacheID string) (*CacheFile, error) {
+func Open(path string) (*CacheFile, error) {
 	const fileMode = 0o666
 	options := bbolt.Options{Timeout: time.Second}
 	db, err := bbolt.Open(path, fileMode, &options)
@@ -32,39 +31,13 @@ func Open(path string, cacheID string) (*CacheFile, error) {
 	if err != nil {
 		return nil, err
 	}
-	var cacheIDBytes []byte
-	if cacheID != "" {
-		cacheIDBytes = append([]byte{0}, []byte(cacheID)...)
-	}
-	return &CacheFile{db, cacheIDBytes}, nil
-}
-
-func (c *CacheFile) bucket(t *bbolt.Tx, key []byte) *bbolt.Bucket {
-	if c.cacheID == nil {
-		return t.Bucket(key)
-	}
-	bucket := t.Bucket(c.cacheID)
-	if bucket == nil {
-		return nil
-	}
-	return bucket.Bucket(key)
-}
-
-func (c *CacheFile) createBucket(t *bbolt.Tx, key []byte) (*bbolt.Bucket, error) {
-	if c.cacheID == nil {
-		return t.CreateBucketIfNotExists(key)
-	}
-	bucket, err := t.CreateBucketIfNotExists(c.cacheID)
-	if bucket == nil {
-		return nil, err
-	}
-	return bucket.CreateBucketIfNotExists(key)
+	return &CacheFile{db}, nil
 }
 
 func (c *CacheFile) LoadSelected(group string) string {
 	var selected string
 	c.DB.View(func(t *bbolt.Tx) error {
-		bucket := c.bucket(t, bucketSelected)
+		bucket := t.Bucket(bucketSelected)
 		if bucket == nil {
 			return nil
 		}
@@ -79,7 +52,7 @@ func (c *CacheFile) LoadSelected(group string) string {
 
 func (c *CacheFile) StoreSelected(group, selected string) error {
 	return c.DB.Batch(func(t *bbolt.Tx) error {
-		bucket, err := c.createBucket(t, bucketSelected)
+		bucket, err := t.CreateBucketIfNotExists(bucketSelected)
 		if err != nil {
 			return err
 		}

experimental/clashapi/connections.go

@@ -6,7 +6,6 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/common/json"
 	"github.com/sagernet/sing-box/experimental/clashapi/trafficontrol"
 	"github.com/sagernet/websocket"
@@ -15,10 +14,10 @@ import (
 	"github.com/go-chi/render"
 )
 
-func connectionRouter(router adapter.Router, trafficManager *trafficontrol.Manager) http.Handler {
+func connectionRouter(trafficManager *trafficontrol.Manager) http.Handler {
 	r := chi.NewRouter()
 	r.Get("/", getConnections(trafficManager))
-	r.Delete("/", closeAllConnections(router, trafficManager))
+	r.Delete("/", closeAllConnections(trafficManager))
 	r.Delete("/{id}", closeConnection(trafficManager))
 	return r
 }
@@ -87,13 +86,12 @@ func closeConnection(trafficManager *trafficontrol.Manager) func(w http.Response
 	}
 }
 
-func closeAllConnections(router adapter.Router, trafficManager *trafficontrol.Manager) func(w http.ResponseWriter, r *http.Request) {
+func closeAllConnections(trafficManager *trafficontrol.Manager) func(w http.ResponseWriter, r *http.Request) {
 	return func(w http.ResponseWriter, r *http.Request) {
 		snapshot := trafficManager.Snapshot()
 		for _, c := range snapshot.Connections {
 			c.Close()
 		}
-		router.ResetNetwork()
 		render.NoContent(w, r)
 	}
 }

experimental/clashapi/proxies.go

@@ -134,7 +134,7 @@ func getProxies(server *Server, router adapter.Router) func(w http.ResponseWrite
 			defaultTag = allProxies[0]
 		}
 
-		sort.SliceStable(allProxies, func(i, j int) bool {
+		sort.Slice(allProxies, func(i, j int) bool {
 			return allProxies[i] == defaultTag
 		})
 

experimental/clashapi/server.go

@@ -48,7 +48,6 @@ type Server struct {
 	storeSelected  bool
 	storeFakeIP    bool
 	cacheFilePath  string
-	cacheID        string
 	cacheFile      adapter.ClashCacheFile
 
 	externalUI               string
@@ -89,7 +88,6 @@ func NewServer(ctx context.Context, router adapter.Router, logFactory log.Observ
 			cachePath = filemanager.BasePath(ctx, cachePath)
 		}
 		server.cacheFilePath = cachePath
-		server.cacheID = options.CacheID
 	}
 	cors := cors.New(cors.Options{
 		AllowedOrigins: []string{"*"},
@@ -107,7 +105,7 @@ func NewServer(ctx context.Context, router adapter.Router, logFactory log.Observ
 		r.Mount("/configs", configRouter(server, logFactory, server.logger))
 		r.Mount("/proxies", proxyRouter(server, router))
 		r.Mount("/rules", ruleRouter(router))
-		r.Mount("/connections", connectionRouter(router, trafficManager))
+		r.Mount("/connections", connectionRouter(trafficManager))
 		r.Mount("/providers/proxies", proxyProviderRouter())
 		r.Mount("/providers/rules", ruleProviderRouter())
 		r.Mount("/script", scriptRouter())
@@ -132,7 +130,7 @@ func NewServer(ctx context.Context, router adapter.Router, logFactory log.Observ
 
 func (s *Server) PreStart() error {
 	if s.cacheFilePath != "" {
-		cacheFile, err := cachefile.Open(s.cacheFilePath, s.cacheID)
+		cacheFile, err := cachefile.Open(s.cacheFilePath)
 		if err != nil {
 			return E.Cause(err, "open cache file")
 		}

experimental/clashapi/trafficontrol/tracker.go

@@ -7,9 +7,9 @@ import (
 	"time"
 
 	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/experimental/trackerconn"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/atomic"
-	"github.com/sagernet/sing/common/bufio"
 	N "github.com/sagernet/sing/common/network"
 
 	"github.com/gofrs/uuid/v5"
@@ -115,13 +115,13 @@ func NewTCPTracker(conn net.Conn, manager *Manager, metadata Metadata, router ad
 	download := new(atomic.Int64)
 
 	t := &tcpTracker{
-		ExtendedConn: bufio.NewCounterConn(conn, []N.CountFunc{func(n int64) {
+		ExtendedConn: trackerconn.NewHook(conn, func(n int64) {
 			upload.Add(n)
 			manager.PushUploaded(n)
-		}}, []N.CountFunc{func(n int64) {
+		}, func(n int64) {
 			download.Add(n)
 			manager.PushDownloaded(n)
-		}}),
+		}),
 		manager: manager,
 		trackerInfo: &trackerInfo{
 			UUID:          uuid,
@@ -202,13 +202,13 @@ func NewUDPTracker(conn N.PacketConn, manager *Manager, metadata Metadata, route
 	download := new(atomic.Int64)
 
 	ut := &udpTracker{
-		PacketConn: bufio.NewCounterPacketConn(conn, []N.CountFunc{func(n int64) {
+		PacketConn: trackerconn.NewHookPacket(conn, func(n int64) {
 			upload.Add(n)
 			manager.PushUploaded(n)
-		}}, []N.CountFunc{func(n int64) {
+		}, func(n int64) {
 			download.Add(n)
 			manager.PushDownloaded(n)
-		}}),
+		}),
 		manager: manager,
 		trackerInfo: &trackerInfo{
 			UUID:          uuid,

experimental/libbox/dns.go

@@ -1,162 +0,0 @@
-package libbox
-
-import (
-	"context"
-	"net/netip"
-	"strings"
-	"syscall"
-
-	"github.com/sagernet/sing-dns"
-	"github.com/sagernet/sing/common"
-	E "github.com/sagernet/sing/common/exceptions"
-	"github.com/sagernet/sing/common/logger"
-	M "github.com/sagernet/sing/common/metadata"
-	N "github.com/sagernet/sing/common/network"
-	"github.com/sagernet/sing/common/task"
-
-	mDNS "github.com/miekg/dns"
-)
-
-type LocalDNSTransport interface {
-	Raw() bool
-	Lookup(ctx *ExchangeContext, network string, domain string) error
-	Exchange(ctx *ExchangeContext, message []byte) error
-}
-
-func RegisterLocalDNSTransport(transport LocalDNSTransport) {
-	if transport == nil {
-		dns.RegisterTransport([]string{"local"}, dns.CreateLocalTransport)
-	} else {
-		dns.RegisterTransport([]string{"local"}, func(name string, ctx context.Context, logger logger.ContextLogger, dialer N.Dialer, link string) (dns.Transport, error) {
-			return &platformLocalDNSTransport{
-				iif: transport,
-			}, nil
-		})
-	}
-}
-
-var _ dns.Transport = (*platformLocalDNSTransport)(nil)
-
-type platformLocalDNSTransport struct {
-	iif LocalDNSTransport
-}
-
-func (p *platformLocalDNSTransport) Name() string {
-	return "local"
-}
-
-func (p *platformLocalDNSTransport) Start() error {
-	return nil
-}
-
-func (p *platformLocalDNSTransport) Close() error {
-	return nil
-}
-
-func (p *platformLocalDNSTransport) Raw() bool {
-	return p.iif.Raw()
-}
-
-func (p *platformLocalDNSTransport) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, error) {
-	messageBytes, err := message.Pack()
-	if err != nil {
-		return nil, err
-	}
-	response := &ExchangeContext{
-		context: ctx,
-	}
-	var responseMessage *mDNS.Msg
-	return responseMessage, task.Run(ctx, func() error {
-		err = p.iif.Exchange(response, messageBytes)
-		if err != nil {
-			return err
-		}
-		if response.error != nil {
-			return response.error
-		}
-		responseMessage = &response.message
-		return nil
-	})
-}
-
-func (p *platformLocalDNSTransport) Lookup(ctx context.Context, domain string, strategy dns.DomainStrategy) ([]netip.Addr, error) {
-	var network string
-	switch strategy {
-	case dns.DomainStrategyUseIPv4:
-		network = "ip4"
-	case dns.DomainStrategyPreferIPv6:
-		network = "ip6"
-	default:
-		network = "ip"
-	}
-	response := &ExchangeContext{
-		context: ctx,
-	}
-	var responseAddr []netip.Addr
-	return responseAddr, task.Run(ctx, func() error {
-		err := p.iif.Lookup(response, network, domain)
-		if err != nil {
-			return err
-		}
-		if response.error != nil {
-			return response.error
-		}
-		switch strategy {
-		case dns.DomainStrategyUseIPv4:
-			responseAddr = common.Filter(response.addresses, func(it netip.Addr) bool {
-				return it.Is4()
-			})
-		case dns.DomainStrategyPreferIPv6:
-			responseAddr = common.Filter(response.addresses, func(it netip.Addr) bool {
-				return it.Is6()
-			})
-		default:
-			responseAddr = response.addresses
-		}
-		/*if len(responseAddr) == 0 {
-			response.error = dns.RCodeSuccess
-		}*/
-		return nil
-	})
-}
-
-type Func interface {
-	Invoke() error
-}
-
-type ExchangeContext struct {
-	context   context.Context
-	message   mDNS.Msg
-	addresses []netip.Addr
-	error     error
-}
-
-func (c *ExchangeContext) OnCancel(callback Func) {
-	go func() {
-		<-c.context.Done()
-		callback.Invoke()
-	}()
-}
-
-func (c *ExchangeContext) Success(result string) {
-	c.addresses = common.Map(common.Filter(strings.Split(result, "\n"), func(it string) bool {
-		return !common.IsEmpty(it)
-	}), func(it string) netip.Addr {
-		return M.ParseSocksaddrHostPort(it, 0).Unwrap().Addr
-	})
-}
-
-func (c *ExchangeContext) RawSuccess(result []byte) {
-	err := c.message.Unpack(result)
-	if err != nil {
-		c.error = E.Cause(err, "parse response")
-	}
-}
-
-func (c *ExchangeContext) ErrorCode(code int32) {
-	c.error = dns.RCodeError(code)
-}
-
-func (c *ExchangeContext) ErrnoCode(code int32) {
-	c.error = syscall.Errno(code)
-}

experimental/libbox/platform.go

@@ -18,7 +18,6 @@ type PlatformInterface interface {
 	CloseDefaultInterfaceMonitor(listener InterfaceUpdateListener) error
 	UsePlatformInterfaceGetter() bool
 	GetInterfaces() (NetworkInterfaceIterator, error)
-	UnderNetworkExtension() bool
 }
 
 type TunInterface interface {

experimental/libbox/platform/interface.go

@@ -22,7 +22,6 @@ type Interface interface {
 	CreateDefaultInterfaceMonitor(errorHandler E.Handler) tun.DefaultInterfaceMonitor
 	UsePlatformInterfaceGetter() bool
 	Interfaces() ([]NetworkInterface, error)
-	UnderNetworkExtension() bool
 	process.Searcher
 	io.Writer
 }

experimental/libbox/service.go

@@ -169,7 +169,3 @@ func (w *platformInterfaceWrapper) Interfaces() ([]platform.NetworkInterface, er
 	}
 	return interfaces, nil
 }
-
-func (w *platformInterfaceWrapper) UnderNetworkExtension() bool {
-	return w.iif.UnderNetworkExtension()
-}

experimental/trackerconn/conn.go

@@ -0,0 +1,108 @@
+package trackerconn
+
+import (
+	"net"
+
+	"github.com/sagernet/sing/common/atomic"
+	"github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/sing/common/bufio"
+	N "github.com/sagernet/sing/common/network"
+)
+
+func New(conn net.Conn, readCounter []*atomic.Int64, writeCounter []*atomic.Int64) *Conn {
+	return &Conn{bufio.NewExtendedConn(conn), readCounter, writeCounter}
+}
+
+func NewHook(conn net.Conn, readCounter func(n int64), writeCounter func(n int64)) *HookConn {
+	return &HookConn{bufio.NewExtendedConn(conn), readCounter, writeCounter}
+}
+
+type Conn struct {
+	N.ExtendedConn
+	readCounter  []*atomic.Int64
+	writeCounter []*atomic.Int64
+}
+
+func (c *Conn) Read(p []byte) (n int, err error) {
+	n, err = c.ExtendedConn.Read(p)
+	for _, counter := range c.readCounter {
+		counter.Add(int64(n))
+	}
+	return n, err
+}
+
+func (c *Conn) ReadBuffer(buffer *buf.Buffer) error {
+	err := c.ExtendedConn.ReadBuffer(buffer)
+	if err != nil {
+		return err
+	}
+	for _, counter := range c.readCounter {
+		counter.Add(int64(buffer.Len()))
+	}
+	return nil
+}
+
+func (c *Conn) Write(p []byte) (n int, err error) {
+	n, err = c.ExtendedConn.Write(p)
+	for _, counter := range c.writeCounter {
+		counter.Add(int64(n))
+	}
+	return n, err
+}
+
+func (c *Conn) WriteBuffer(buffer *buf.Buffer) error {
+	dataLen := int64(buffer.Len())
+	err := c.ExtendedConn.WriteBuffer(buffer)
+	if err != nil {
+		return err
+	}
+	for _, counter := range c.writeCounter {
+		counter.Add(dataLen)
+	}
+	return nil
+}
+
+func (c *Conn) Upstream() any {
+	return c.ExtendedConn
+}
+
+type HookConn struct {
+	N.ExtendedConn
+	readCounter  func(n int64)
+	writeCounter func(n int64)
+}
+
+func (c *HookConn) Read(p []byte) (n int, err error) {
+	n, err = c.ExtendedConn.Read(p)
+	c.readCounter(int64(n))
+	return n, err
+}
+
+func (c *HookConn) ReadBuffer(buffer *buf.Buffer) error {
+	err := c.ExtendedConn.ReadBuffer(buffer)
+	if err != nil {
+		return err
+	}
+	c.readCounter(int64(buffer.Len()))
+	return nil
+}
+
+func (c *HookConn) Write(p []byte) (n int, err error) {
+	n, err = c.ExtendedConn.Write(p)
+	c.writeCounter(int64(n))
+	return n, err
+}
+
+func (c *HookConn) WriteBuffer(buffer *buf.Buffer) error {
+	dataLen := int64(buffer.Len())
+	err := c.ExtendedConn.WriteBuffer(buffer)
+	if err != nil {
+		return err
+	}
+	c.writeCounter(dataLen)
+	return nil
+}
+
+func (c *HookConn) Upstream() any {
+	return c.ExtendedConn
+}

experimental/trackerconn/packet_conn.go

@@ -0,0 +1,76 @@
+package trackerconn
+
+import (
+	"github.com/sagernet/sing/common/atomic"
+	"github.com/sagernet/sing/common/buf"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+)
+
+func NewPacket(conn N.PacketConn, readCounter []*atomic.Int64, writeCounter []*atomic.Int64) *PacketConn {
+	return &PacketConn{conn, readCounter, writeCounter}
+}
+
+func NewHookPacket(conn N.PacketConn, readCounter func(n int64), writeCounter func(n int64)) *HookPacketConn {
+	return &HookPacketConn{conn, readCounter, writeCounter}
+}
+
+type PacketConn struct {
+	N.PacketConn
+	readCounter  []*atomic.Int64
+	writeCounter []*atomic.Int64
+}
+
+func (c *PacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
+	destination, err = c.PacketConn.ReadPacket(buffer)
+	if err == nil {
+		for _, counter := range c.readCounter {
+			counter.Add(int64(buffer.Len()))
+		}
+	}
+	return
+}
+
+func (c *PacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
+	dataLen := int64(buffer.Len())
+	err := c.PacketConn.WritePacket(buffer, destination)
+	if err != nil {
+		return err
+	}
+	for _, counter := range c.writeCounter {
+		counter.Add(dataLen)
+	}
+	return nil
+}
+
+func (c *PacketConn) Upstream() any {
+	return c.PacketConn
+}
+
+type HookPacketConn struct {
+	N.PacketConn
+	readCounter  func(n int64)
+	writeCounter func(n int64)
+}
+
+func (c *HookPacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
+	destination, err = c.PacketConn.ReadPacket(buffer)
+	if err == nil {
+		c.readCounter(int64(buffer.Len()))
+	}
+	return
+}
+
+func (c *HookPacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
+	dataLen := int64(buffer.Len())
+	err := c.PacketConn.WritePacket(buffer, destination)
+	if err != nil {
+		return err
+	}
+	c.writeCounter(dataLen)
+	return nil
+}
+
+func (c *HookPacketConn) Upstream() any {
+	return c.PacketConn
+}

experimental/v2rayapi/stats.go

@@ -10,9 +10,9 @@ import (
 	"time"
 
 	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/experimental/trackerconn"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing/common/atomic"
-	"github.com/sagernet/sing/common/bufio"
 	E "github.com/sagernet/sing/common/exceptions"
 	N "github.com/sagernet/sing/common/network"
 )
@@ -83,7 +83,7 @@ func (s *StatsService) RoutedConnection(inbound string, outbound string, user st
 		writeCounter = append(writeCounter, s.loadOrCreateCounter("user>>>"+user+">>>traffic>>>downlink"))
 	}
 	s.access.Unlock()
-	return bufio.NewInt64CounterConn(conn, readCounter, writeCounter)
+	return trackerconn.New(conn, readCounter, writeCounter)
 }
 
 func (s *StatsService) RoutedPacketConnection(inbound string, outbound string, user string, conn N.PacketConn) N.PacketConn {
@@ -109,7 +109,7 @@ func (s *StatsService) RoutedPacketConnection(inbound string, outbound string, u
 		writeCounter = append(writeCounter, s.loadOrCreateCounter("user>>>"+user+">>>traffic>>>downlink"))
 	}
 	s.access.Unlock()
-	return bufio.NewInt64CounterPacketConn(conn, readCounter, writeCounter)
+	return trackerconn.NewPacket(conn, readCounter, writeCounter)
 }
 
 func (s *StatsService) GetStats(ctx context.Context, request *GetStatsRequest) (*GetStatsResponse, error) {

go.mod

@@ -4,8 +4,8 @@ go 1.18
 
 require (
 	berty.tech/go-libtor v1.0.385
-	github.com/Dreamacro/clash v1.16.0
-	github.com/caddyserver/certmagic v0.18.2
+	github.com/Dreamacro/clash v1.15.0
+	github.com/caddyserver/certmagic v0.17.2
 	github.com/cretz/bine v0.2.0
 	github.com/dustin/go-humanize v1.0.1
 	github.com/fsnotify/fsnotify v1.6.0
@@ -13,87 +13,82 @@ require (
 	github.com/go-chi/cors v1.2.1
 	github.com/go-chi/render v1.0.2
 	github.com/gofrs/uuid/v5 v5.0.0
-	github.com/insomniacslk/dhcp v0.0.0-20230612134759-b20c9ba983df
+	github.com/hashicorp/yamux v0.1.1
+	github.com/insomniacslk/dhcp v0.0.0-20230407062729-974c6f05fe16
 	github.com/logrusorgru/aurora v2.0.3+incompatible
-	github.com/mholt/acmez v1.2.0
-	github.com/miekg/dns v1.1.55
-	github.com/ooni/go-libtor v1.1.8
-	github.com/oschwald/maxminddb-golang v1.11.0
+	github.com/mholt/acmez v1.1.0
+	github.com/miekg/dns v1.1.53
+	github.com/ooni/go-libtor v1.1.7
+	github.com/oschwald/maxminddb-golang v1.10.0
 	github.com/pires/go-proxyproto v0.7.0
 	github.com/sagernet/cloudflare-tls v0.0.0-20221031050923-d70792f4c3a0
 	github.com/sagernet/gomobile v0.0.0-20230413023804-244d7ff07035
-	github.com/sagernet/gvisor v0.0.0-20230627031050-1ab0276e0dd2
-	github.com/sagernet/quic-go v0.0.0-20230615020047-10f05c797c02
+	github.com/sagernet/quic-go v0.0.0-20230202071646-a8c8afb18b32
 	github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691
-	github.com/sagernet/sing v0.2.7
-	github.com/sagernet/sing-dns v0.1.6
-	github.com/sagernet/sing-mux v0.1.0
-	github.com/sagernet/sing-shadowsocks v0.2.2
-	github.com/sagernet/sing-shadowsocks2 v0.1.1
-	github.com/sagernet/sing-shadowtls v0.1.2
-	github.com/sagernet/sing-tun v0.1.8
-	github.com/sagernet/sing-vmess v0.1.6
+	github.com/sagernet/sing v0.2.4
+	github.com/sagernet/sing-dns v0.1.5-0.20230415085626-111ecf799dfc
+	github.com/sagernet/sing-shadowsocks v0.2.2-0.20230417102954-f77257340507
+	github.com/sagernet/sing-shadowtls v0.1.2-0.20230417103049-4f682e05f19b
+	github.com/sagernet/sing-tun v0.1.5-0.20230422121432-209ec123ca7b
+	github.com/sagernet/sing-vmess v0.1.5-0.20230417103030-8c3070ae3fb3
 	github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37
 	github.com/sagernet/tfo-go v0.0.0-20230303015439-ffcfd8c41cf9
 	github.com/sagernet/utls v0.0.0-20230309024959-6732c2ab36f2
 	github.com/sagernet/websocket v0.0.0-20220913015213-615516348b4e
 	github.com/sagernet/wireguard-go v0.0.0-20230420044414-a7bac1754e77
 	github.com/spf13/cobra v1.7.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.8.2
 	go.etcd.io/bbolt v1.3.7
 	go.uber.org/zap v1.24.0
 	go4.org/netipx v0.0.0-20230303233057-f1b76eb4bb35
-	golang.org/x/crypto v0.10.0
-	golang.org/x/exp v0.0.0-20230522175609-2e198f4a06a1
-	golang.org/x/net v0.11.0
-	golang.org/x/sys v0.9.0
-	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230429144221-925a1e7659e6
-	google.golang.org/grpc v1.56.1
+	golang.org/x/crypto v0.8.0
+	golang.org/x/exp v0.0.0-20230321023759-10a507213a29
+	golang.org/x/net v0.9.0
+	golang.org/x/sys v0.7.0
+	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230215201556-9c5414ab4bde
+	google.golang.org/grpc v1.54.0
 	google.golang.org/protobuf v1.30.0
+	gvisor.dev/gvisor v0.0.0-20230415003630-3981d5d5e523
 )
 
 //replace github.com/sagernet/sing => ../sing
 
 require (
-	github.com/Dreamacro/protobytes v0.0.0-20230324064118-87bc784139cd // indirect
 	github.com/ajg/form v1.5.1 // indirect
 	github.com/andybalholm/brotli v1.0.5 // indirect
 	github.com/cloudflare/circl v1.2.1-0.20221019164342-6ab4dfed8f3c // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/go-ole/go-ole v1.2.6 // indirect
 	github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
-	github.com/google/btree v1.1.2 // indirect
+	github.com/golang/mock v1.6.0 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/btree v1.0.1 // indirect
 	github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect
-	github.com/hashicorp/yamux v0.1.1 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/josharian/native v1.1.0 // indirect
 	github.com/klauspost/compress v1.15.15 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.5 // indirect
+	github.com/klauspost/cpuid/v2 v2.1.1 // indirect
 	github.com/libdns/libdns v0.2.1 // indirect
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/onsi/ginkgo/v2 v2.2.0 // indirect
 	github.com/pierrec/lz4/v4 v4.1.14 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/quic-go/qpack v0.4.0 // indirect
 	github.com/quic-go/qtls-go1-18 v0.2.0 // indirect
-	github.com/quic-go/qtls-go1-19 v0.3.2 // indirect
-	github.com/quic-go/qtls-go1-20 v0.2.2 // indirect
+	github.com/quic-go/qtls-go1-19 v0.2.0 // indirect
+	github.com/quic-go/qtls-go1-20 v0.1.0 // indirect
 	github.com/sagernet/go-tun2socks v1.16.12-0.20220818015926-16cb67876a61 // indirect
 	github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97 // indirect
-	github.com/scjalliance/comshim v0.0.0-20230315213746-5e51f40bd3b9 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/u-root/uio v0.0.0-20230220225925-ffce2a382923 // indirect
 	github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74 // indirect
-	go.uber.org/atomic v1.11.0 // indirect
-	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/mod v0.11.0 // indirect
-	golang.org/x/text v0.10.0 // indirect
-	golang.org/x/time v0.3.0 // indirect
-	golang.org/x/tools v0.10.0 // indirect
-	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
+	go.uber.org/atomic v1.10.0 // indirect
+	go.uber.org/multierr v1.6.0 // indirect
+	golang.org/x/mod v0.8.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
+	golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 // indirect
+	golang.org/x/tools v0.6.0 // indirect
+	google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect
 	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	lukechampine.com/blake3 v1.2.1 // indirect
+	lukechampine.com/blake3 v1.1.7 // indirect
 )

go.sum

@@ -1,16 +1,14 @@
 berty.tech/go-libtor v1.0.385 h1:RWK94C3hZj6Z2GdvePpHJLnWYobFr3bY/OdUJ5aoEXw=
 berty.tech/go-libtor v1.0.385/go.mod h1:9swOOQVb+kmvuAlsgWUK/4c52pm69AdbJsxLzk+fJEw=
-github.com/Dreamacro/clash v1.16.0 h1:Ve+8mvtsCv7ySa6f53/GOW6Tho0AFp5RNFsgQZFKcZs=
-github.com/Dreamacro/clash v1.16.0/go.mod h1:ZM3UI2gqqUN7UL7L/F9aTHODTByya6sbC/WivQpaoJk=
-github.com/Dreamacro/protobytes v0.0.0-20230324064118-87bc784139cd h1:ygk7IF14j4ep4H2ZyeDe3IEoMZF8JdbX851RVVa/4D8=
-github.com/Dreamacro/protobytes v0.0.0-20230324064118-87bc784139cd/go.mod h1:QvmEZ/h6KXszPOr2wUFl7Zn3hfFNYdfbXwPVDTyZs6k=
+github.com/Dreamacro/clash v1.15.0 h1:mlpD950VEggXZBNahV66hyKDRxcczkj3vymoAt78KyE=
+github.com/Dreamacro/clash v1.15.0/go.mod h1:WNH69bN11LiAdgdSr4hpkEuXVMfBbWyhEKMCTx9BtNE=
 github.com/ajg/form v1.5.1 h1:t9c7v8JUKu/XxOGBU0yjNpaMloxGEJhUkqFRq0ibGeU=
 github.com/ajg/form v1.5.1/go.mod h1:uL1WgH+h2mgNtvBq0339dVnzXdBETtL2LeUXaIv25UY=
 github.com/andybalholm/brotli v1.0.5 h1:8uQZIdzKmjc/iuPu7O2ioW48L81FgatrcpfFmiq/cCs=
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@@ -33,18 +31,17 @@ github.com/go-chi/cors v1.2.1 h1:xEC8UT3Rlp2QuWNEr4Fs/c2EAGVKBwy/1vHx3bppil4=
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@@ -54,15 +51,16 @@ github.com/hashicorp/yamux v0.1.1/go.mod h1:CtWFDAQgb7dxtzFs4tWbplKIe2jSi3+5vKbg
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@@ -70,35 +68,34 @@ github.com/libdns/libdns v0.2.1 h1:Wu59T7wSHRgtA0cfxC+n1c/e+O3upJGWytknkmFEDis=
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-golang.org/x/tools v0.10.0/go.mod h1:UJwyiVBsOA2uwvK/e5OY3GTpDUJriEd+/YlqAwLPmyM=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/tools v0.6.0 h1:BOw41kyTf3PuCW1pVQf8+Cyg8pMlkYB1oo9iJ6D/lKM=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230429144221-925a1e7659e6 h1:CawjfCvYQH2OU3/TnxLx97WDSUDRABfT18pCOYwc2GE=
-golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230429144221-925a1e7659e6/go.mod h1:3rxYc4HtVcSG9gVaTs2GEBdehh+sYPOwKtyUWEOTb80=
-google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 h1:KpwkzHKEF7B9Zxg18WzOa7djJ+Ha5DzthMyZYQfEn2A=
-google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1/go.mod h1:nKE/iIaLqn2bQwXBg8f1g2Ylh6r5MN5CmZvuzZCgsCU=
-google.golang.org/grpc v1.56.1 h1:z0dNfjIl0VpaZ9iSVjA6daGatAYwPGstTjt5vkRMFkQ=
-google.golang.org/grpc v1.56.1/go.mod h1:I9bI3vqKfayGqPUAwGdOSu7kt6oIJLixfffKrpXqQ9s=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230215201556-9c5414ab4bde h1:ybF7AMzIUikL9x4LgwEmzhXtzRpKNqngme1VGDWz+Nk=
+golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230215201556-9c5414ab4bde/go.mod h1:mQqgjkW8GQQcJQsbBvK890TKqUK1DfKWkuBGbOkuMHQ=
+google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f h1:BWUVssLB0HVOSY78gIdvk1dTVYtT1y8SBWtPYuTJ/6w=
+google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f/go.mod h1:RGgjbofJ8xD9Sq1VVhDM1Vok1vRONV+rg+CjzG4SZKM=
+google.golang.org/grpc v1.54.0 h1:EhTqbhiYeixwWQtAEZAxmV9MGqcjEU2mFx52xCzNyag=
+google.golang.org/grpc v1.54.0/go.mod h1:PUSEXI6iWghWaB6lXM4knEgpJNu2qUcKfDtNci3EC2g=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
@@ -223,5 +236,7 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-lukechampine.com/blake3 v1.2.1 h1:YuqqRuaqsGV71BV/nm9xlI0MKUv4QC54jQnBChWbGnI=
-lukechampine.com/blake3 v1.2.1/go.mod h1:0OFRp7fBtAylGVCO40o87sbupkyIGgbpv1+M1k1LM6k=
+gvisor.dev/gvisor v0.0.0-20230415003630-3981d5d5e523 h1:zUQYeyyPLnSR6yMvLSOmLH37xDWCZ7BqlpE69fE5K3Q=
+gvisor.dev/gvisor v0.0.0-20230415003630-3981d5d5e523/go.mod h1:pzr6sy8gDLfVmDAg8OYrlKvGEHw5C3PGTiBXBTCx76Q=
+lukechampine.com/blake3 v1.1.7 h1:GgRMhmdsuK8+ii6UZFDL8Nb+VyMwadAgcJyfYHxG6n0=
+lukechampine.com/blake3 v1.1.7/go.mod h1:tkKEOtDkNtklkXtLNEOGNq5tcV90tJiA1vAA12R78LA=

inbound/hysteria.go

@@ -35,7 +35,7 @@ type Hysteria struct {
 	xplusKey     []byte
 	sendBPS      uint64
 	recvBPS      uint64
-	listener     *quic.Listener
+	listener     quic.Listener
 	udpAccess    sync.RWMutex
 	udpSessionId uint32
 	udpSessions  map[uint32]chan *hysteria.UDPMessage

inbound/tun.go

@@ -19,7 +19,10 @@ import (
 	"github.com/sagernet/sing/common/ranges"
 )
 
-var _ adapter.Inbound = (*Tun)(nil)
+var (
+	_ adapter.Inbound = (*Tun)(nil)
+	_ tun.Router      = (*Tun)(nil)
+)
 
 type Tun struct {
 	tag                    string
@@ -158,6 +161,10 @@ func (t *Tun) Start() error {
 	}
 	t.logger.Trace("creating stack")
 	t.tunIf = tunInterface
+	var tunRouter tun.Router
+	if len(t.router.IPRules()) > 0 {
+		tunRouter = t
+	}
 	t.tunStack, err = tun.NewStack(t.stack, tun.StackOptions{
 		Context:                t.ctx,
 		Tun:                    tunInterface,
@@ -167,6 +174,7 @@ func (t *Tun) Start() error {
 		Inet6Address:           t.tunOptions.Inet6Address,
 		EndpointIndependentNat: t.endpointIndependentNat,
 		UDPTimeout:             t.udpTimeout,
+		Router:                 tunRouter,
 		Handler:                t,
 		Logger:                 t.logger,
 		ForwarderBindInterface: t.platformInterface != nil,
@@ -191,6 +199,21 @@ func (t *Tun) Close() error {
 	)
 }
 
+func (t *Tun) RouteConnection(session tun.RouteSession, conn tun.RouteContext) tun.RouteAction {
+	ctx := log.ContextWithNewID(t.ctx)
+	var metadata adapter.InboundContext
+	metadata.Inbound = t.tag
+	metadata.InboundType = C.TypeTun
+	metadata.IPVersion = session.IPVersion
+	metadata.Network = tun.NetworkName(session.Network)
+	metadata.Source = M.SocksaddrFromNetIP(session.Source)
+	metadata.Destination = M.SocksaddrFromNetIP(session.Destination)
+	metadata.InboundOptions = t.inboundOptions
+	t.logger.DebugContext(ctx, "incoming connection from ", metadata.Source)
+	t.logger.DebugContext(ctx, "incoming connection to ", metadata.Destination)
+	return t.router.RouteIPConnection(ctx, conn, metadata)
+}
+
 func (t *Tun) NewConnection(ctx context.Context, conn net.Conn, upstreamMetadata M.Metadata) error {
 	ctx = log.ContextWithNewID(ctx)
 	var metadata adapter.InboundContext

mkdocs.yml

@@ -55,6 +55,7 @@ nav:
           - configuration/route/index.md
           - GeoIP: configuration/route/geoip.md
           - Geosite: configuration/route/geosite.md
+          - IP Route Rule: configuration/route/ip-rule.md
           - Route Rule: configuration/route/rule.md
           - Protocol Sniff: configuration/route/sniff.md
       - Experimental:
@@ -114,7 +115,6 @@ nav:
       - ShadowTLS: examples/shadowtls.md
       - Clash API: examples/clash-api.md
       - WireGuard Direct: examples/wireguard-direct.md
-      - FakeIP: examples/fakeip.md
   - Contributing:
       - contributing/index.md
       - Developing:
@@ -147,7 +147,6 @@ extra:
       link: https://github.com/SagerNet/sing-box
   generator: false
 plugins:
-  - search
   - i18n:
       default_language: en
       languages:
@@ -174,6 +173,7 @@ plugins:
           DNS Rule: DNS 规则
 
           Route: 路由
+          IP Route Rule: IP 路由规则
           Route Rule: 路由规则
           Protocol Sniff: 协议探测
 
@@ -192,4 +192,4 @@ plugins:
           Known Issues: 已知问题
           Examples: 示例
           Linux Server Installation: Linux 服务器安装
-          DNS Hijack: DNS 劫持
+          DNS Hijack: DNS 劫持

option/clash.go

@@ -10,7 +10,6 @@ type ClashAPIOptions struct {
 	StoreSelected            bool   `json:"store_selected,omitempty"`
 	StoreFakeIP              bool   `json:"store_fakeip,omitempty"`
 	CacheFile                string `json:"cache_file,omitempty"`
-	CacheID                  string `json:"cache_id,omitempty"`
 }
 
 type SelectorOutboundOptions struct {

option/dns.go

@@ -20,10 +20,9 @@ type DNSServerOptions struct {
 }
 
 type DNSClientOptions struct {
-	Strategy         DomainStrategy `json:"strategy,omitempty"`
-	DisableCache     bool           `json:"disable_cache,omitempty"`
-	DisableExpire    bool           `json:"disable_expire,omitempty"`
-	IndependentCache bool           `json:"independent_cache,omitempty"`
+	Strategy      DomainStrategy `json:"strategy,omitempty"`
+	DisableCache  bool           `json:"disable_cache,omitempty"`
+	DisableExpire bool           `json:"disable_expire,omitempty"`
 }
 
 type DNSFakeIPOptions struct {

option/route.go

@@ -3,6 +3,7 @@ package option
 type RouteOptions struct {
 	GeoIP               *GeoIPOptions   `json:"geoip,omitempty"`
 	Geosite             *GeositeOptions `json:"geosite,omitempty"`
+	IPRules             []IPRule        `json:"ip_rules,omitempty"`
 	Rules               []Rule          `json:"rules,omitempty"`
 	Final               string          `json:"final,omitempty"`
 	FindProcess         bool            `json:"find_process,omitempty"`

option/rule_ip.go

@@ -0,0 +1,120 @@
+package option
+
+import (
+	"reflect"
+
+	"github.com/sagernet/sing-box/common/json"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-tun"
+	"github.com/sagernet/sing/common"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+type _IPRule struct {
+	Type           string        `json:"type,omitempty"`
+	DefaultOptions DefaultIPRule `json:"-"`
+	LogicalOptions LogicalIPRule `json:"-"`
+}
+
+type IPRule _IPRule
+
+func (r IPRule) MarshalJSON() ([]byte, error) {
+	var v any
+	switch r.Type {
+	case C.RuleTypeDefault:
+		r.Type = ""
+		v = r.DefaultOptions
+	case C.RuleTypeLogical:
+		v = r.LogicalOptions
+	default:
+		return nil, E.New("unknown rule type: " + r.Type)
+	}
+	return MarshallObjects((_IPRule)(r), v)
+}
+
+func (r *IPRule) UnmarshalJSON(bytes []byte) error {
+	err := json.Unmarshal(bytes, (*_IPRule)(r))
+	if err != nil {
+		return err
+	}
+	var v any
+	switch r.Type {
+	case "", C.RuleTypeDefault:
+		r.Type = C.RuleTypeDefault
+		v = &r.DefaultOptions
+	case C.RuleTypeLogical:
+		v = &r.LogicalOptions
+	default:
+		return E.New("unknown rule type: " + r.Type)
+	}
+	err = UnmarshallExcluded(bytes, (*_IPRule)(r), v)
+	if err != nil {
+		return E.Cause(err, "ip route rule")
+	}
+	return nil
+}
+
+type DefaultIPRule struct {
+	Inbound         Listable[string] `json:"inbound,omitempty"`
+	IPVersion       int              `json:"ip_version,omitempty"`
+	Network         Listable[string] `json:"network,omitempty"`
+	Domain          Listable[string] `json:"domain,omitempty"`
+	DomainSuffix    Listable[string] `json:"domain_suffix,omitempty"`
+	DomainKeyword   Listable[string] `json:"domain_keyword,omitempty"`
+	DomainRegex     Listable[string] `json:"domain_regex,omitempty"`
+	Geosite         Listable[string] `json:"geosite,omitempty"`
+	SourceGeoIP     Listable[string] `json:"source_geoip,omitempty"`
+	GeoIP           Listable[string] `json:"geoip,omitempty"`
+	SourceIPCIDR    Listable[string] `json:"source_ip_cidr,omitempty"`
+	IPCIDR          Listable[string] `json:"ip_cidr,omitempty"`
+	SourcePort      Listable[uint16] `json:"source_port,omitempty"`
+	SourcePortRange Listable[string] `json:"source_port_range,omitempty"`
+	Port            Listable[uint16] `json:"port,omitempty"`
+	PortRange       Listable[string] `json:"port_range,omitempty"`
+	Invert          bool             `json:"invert,omitempty"`
+	Action          RouteAction      `json:"action,omitempty"`
+	Outbound        string           `json:"outbound,omitempty"`
+}
+
+type RouteAction tun.ActionType
+
+func (a RouteAction) MarshalJSON() ([]byte, error) {
+	typeName, err := tun.ActionTypeName(tun.ActionType(a))
+	if err != nil {
+		return nil, err
+	}
+	return json.Marshal(typeName)
+}
+
+func (a *RouteAction) UnmarshalJSON(bytes []byte) error {
+	var value string
+	err := json.Unmarshal(bytes, &value)
+	if err != nil {
+		return err
+	}
+	actionType, err := tun.ParseActionType(value)
+	if err != nil {
+		return err
+	}
+	*a = RouteAction(actionType)
+	return nil
+}
+
+func (r DefaultIPRule) IsValid() bool {
+	var defaultValue DefaultIPRule
+	defaultValue.Invert = r.Invert
+	defaultValue.Outbound = r.Outbound
+	return !reflect.DeepEqual(r, defaultValue)
+}
+
+type LogicalIPRule struct {
+	Mode     string          `json:"mode"`
+	Rules    []DefaultIPRule `json:"rules,omitempty"`
+	Invert   bool            `json:"invert,omitempty"`
+	Action   RouteAction     `json:"action,omitempty"`
+	Outbound string          `json:"outbound,omitempty"`
+}
+
+func (r LogicalIPRule) IsValid() bool {
+	return len(r.Rules) > 0 && common.All(r.Rules, DefaultIPRule.IsValid)
+}

option/vless.go

@@ -20,7 +20,6 @@ type VLESSOutboundOptions struct {
 	Flow           string                 `json:"flow,omitempty"`
 	Network        NetworkList            `json:"network,omitempty"`
 	TLS            *OutboundTLSOptions    `json:"tls,omitempty"`
-	Multiplex      *MultiplexOptions      `json:"multiplex,omitempty"`
 	Transport      *V2RayTransportOptions `json:"transport,omitempty"`
 	PacketEncoding *string                `json:"packet_encoding,omitempty"`
 }

option/wireguard.go

@@ -14,6 +14,7 @@ type WireGuardOutboundOptions struct {
 	Workers       int         `json:"workers,omitempty"`
 	MTU           uint32      `json:"mtu,omitempty"`
 	Network       NetworkList `json:"network,omitempty"`
+	IPRewrite     bool        `json:"ip_rewrite,omitempty"`
 }
 
 type WireGuardPeer struct {

outbound/default.go

@@ -11,7 +11,6 @@ import (
 	"github.com/sagernet/sing-box/adapter"
 	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/buf"
 	"github.com/sagernet/sing/common/bufio"
@@ -21,12 +20,11 @@ import (
 )
 
 type myOutboundAdapter struct {
-	protocol     string
-	network      []string
-	router       adapter.Router
-	logger       log.ContextLogger
-	tag          string
-	dependencies []string
+	protocol string
+	network  []string
+	router   adapter.Router
+	logger   log.ContextLogger
+	tag      string
 }
 
 func (a *myOutboundAdapter) Type() string {
@@ -41,21 +39,10 @@ func (a *myOutboundAdapter) Network() []string {
 	return a.network
 }
 
-func (a *myOutboundAdapter) Dependencies() []string {
-	return a.dependencies
-}
-
 func (a *myOutboundAdapter) NewError(ctx context.Context, err error) {
 	NewError(a.logger, ctx, err)
 }
 
-func withDialerDependency(options option.DialerOptions) []string {
-	if options.Detour != "" {
-		return []string{options.Detour}
-	}
-	return nil
-}
-
 func NewConnection(ctx context.Context, this N.Dialer, conn net.Conn, metadata adapter.InboundContext) error {
 	ctx = adapter.WithContext(ctx, &metadata)
 	var outConn net.Conn

outbound/direct.go

@@ -40,12 +40,11 @@ func NewDirect(router adapter.Router, logger log.ContextLogger, tag string, opti
 	options.UDPFragmentDefault = true
 	outbound := &Direct{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeDirect,
-			network:      []string{N.NetworkTCP, N.NetworkUDP},
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeDirect,
+			network:  []string{N.NetworkTCP, N.NetworkUDP},
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		domainStrategy: dns.DomainStrategy(options.DomainStrategy),
 		fallbackDelay:  time.Duration(options.FallbackDelay),

outbound/dns.go

@@ -11,7 +11,6 @@ import (
 	"github.com/sagernet/sing-dns"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
-	"github.com/sagernet/sing/common/bufio"
 	"github.com/sagernet/sing/common/canceler"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
@@ -102,142 +101,29 @@ func (d *DNS) handleConnection(ctx context.Context, conn net.Conn, metadata adap
 }
 
 func (d *DNS) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
-	var reader N.PacketReader = conn
-	var counters []N.CountFunc
-	var cachedPackets []*N.PacketBuffer
-	for {
-		reader, counters = N.UnwrapCountPacketReader(reader, counters)
-		if cachedReader, isCached := reader.(N.CachedPacketReader); isCached {
-			packet := cachedReader.ReadCachedPacket()
-			if packet != nil {
-				cachedPackets = append(cachedPackets, packet)
-				continue
-			}
-		}
-		if readWaiter, created := bufio.CreatePacketReadWaiter(reader); created {
-			return d.newPacketConnection(ctx, conn, readWaiter, counters, cachedPackets, metadata)
-		}
-		break
-	}
 	ctx = adapter.WithContext(ctx, &metadata)
 	fastClose, cancel := common.ContextWithCancelCause(ctx)
 	timeout := canceler.New(fastClose, cancel, C.DNSTimeout)
 	var group task.Group
 	group.Append0(func(ctx context.Context) error {
+		_buffer := buf.StackNewSize(dns.FixedPacketSize)
+		defer common.KeepAlive(_buffer)
+		buffer := common.Dup(_buffer)
+		defer buffer.Release()
 		for {
-			var message mDNS.Msg
-			var destination M.Socksaddr
-			var err error
-			if len(cachedPackets) > 0 {
-				packet := cachedPackets[0]
-				cachedPackets = cachedPackets[1:]
-				for _, counter := range counters {
-					counter(int64(packet.Buffer.Len()))
-				}
-				err = message.Unpack(packet.Buffer.Bytes())
-				packet.Buffer.Release()
-				if err != nil {
-					cancel(err)
-					return err
-				}
-				destination = packet.Destination
-			} else {
-				buffer := buf.NewPacket()
-				destination, err = conn.ReadPacket(buffer)
-				if err != nil {
-					buffer.Release()
-					cancel(err)
-					return err
-				}
-				for _, counter := range counters {
-					counter(int64(buffer.Len()))
-				}
-				err = message.Unpack(buffer.Bytes())
-				buffer.Release()
-				if err != nil {
-					cancel(err)
-					return err
-				}
-				timeout.Update()
-			}
-			metadataInQuery := metadata
-			go func() error {
-				response, err := d.router.Exchange(adapter.WithContext(ctx, &metadataInQuery), &message)
-				if err != nil {
-					cancel(err)
-					return err
-				}
-				timeout.Update()
-				responseBuffer := buf.NewPacket()
-				n, err := response.PackBuffer(responseBuffer.FreeBytes())
-				if err != nil {
-					cancel(err)
-					responseBuffer.Release()
-					return err
-				}
-				responseBuffer.Truncate(len(n))
-				err = conn.WritePacket(responseBuffer, destination)
-				if err != nil {
-					cancel(err)
-				}
-				return err
-			}()
-		}
-	})
-	group.Cleanup(func() {
-		conn.Close()
-	})
-	return group.Run(fastClose)
-}
-
-func (d *DNS) newPacketConnection(ctx context.Context, conn N.PacketConn, readWaiter N.PacketReadWaiter, readCounters []N.CountFunc, cached []*N.PacketBuffer, metadata adapter.InboundContext) error {
-	ctx = adapter.WithContext(ctx, &metadata)
-	fastClose, cancel := common.ContextWithCancelCause(ctx)
-	timeout := canceler.New(fastClose, cancel, C.DNSTimeout)
-	var group task.Group
-	group.Append0(func(ctx context.Context) error {
-		var buffer *buf.Buffer
-		readWaiter.InitializeReadWaiter(func() *buf.Buffer {
-			buffer = buf.NewSize(dns.FixedPacketSize)
 			buffer.FullReset()
-			return buffer
-		})
-		defer readWaiter.InitializeReadWaiter(nil)
-		for {
-			var message mDNS.Msg
-			var destination M.Socksaddr
-			var err error
-			if len(cached) > 0 {
-				packet := cached[0]
-				cached = cached[1:]
-				for _, counter := range readCounters {
-					counter(int64(packet.Buffer.Len()))
-				}
-				err = message.Unpack(packet.Buffer.Bytes())
-				packet.Buffer.Release()
-				if err != nil {
-					cancel(err)
-					return err
-				}
-				destination = packet.Destination
-			} else {
-				destination, err = readWaiter.WaitReadPacket()
-				if err != nil {
-					buffer.Release()
-					cancel(err)
-					return err
-				}
-				for _, counter := range readCounters {
-					counter(int64(buffer.Len()))
-				}
-				err = message.Unpack(buffer.Bytes())
-				buffer.Release()
-				if err != nil {
-					cancel(err)
-					return err
-				}
-				timeout.Update()
+			destination, err := conn.ReadPacket(buffer)
+			if err != nil {
+				cancel(err)
+				return err
 			}
+			var message mDNS.Msg
+			err = message.Unpack(buffer.Bytes())
+			if err != nil {
+				cancel(err)
+				return err
+			}
+			timeout.Update()
 			metadataInQuery := metadata
 			go func() error {
 				response, err := d.router.Exchange(adapter.WithContext(ctx, &metadataInQuery), &message)

outbound/http.go

@@ -39,12 +39,11 @@ func NewHTTP(router adapter.Router, logger log.ContextLogger, tag string, option
 	}
 	return &HTTP{
 		myOutboundAdapter{
-			protocol:     C.TypeHTTP,
-			network:      []string{N.NetworkTCP},
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeHTTP,
+			network:  []string{N.NetworkTCP},
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		sHTTP.NewClient(sHTTP.Options{
 			Dialer:   detour,

outbound/hysteria.go

@@ -119,12 +119,11 @@ func NewHysteria(ctx context.Context, router adapter.Router, logger log.ContextL
 	}
 	return &Hysteria{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeHysteria,
-			network:      options.Network.Build(),
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeHysteria,
+			network:  options.Network.Build(),
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		ctx:        ctx,
 		dialer:     dialer.New(router, options.DialerOptions),
@@ -151,7 +150,6 @@ func (h *Hysteria) offer(ctx context.Context) (quic.Connection, error) {
 	if conn != nil && !common.Done(conn.Context()) {
 		return conn, nil
 	}
-	common.Close(h.rawConn)
 	conn, err := h.offerNew(ctx)
 	if err != nil {
 		return nil, err
@@ -178,7 +176,7 @@ func (h *Hysteria) offerNew(ctx context.Context) (quic.Connection, error) {
 		packetConn = hysteria.NewXPlusPacketConn(packetConn, h.xplusKey)
 	}
 	packetConn = &hysteria.PacketConnWrapper{PacketConn: packetConn}
-	quicConn, err := quic.Dial(h.ctx, packetConn, udpConn.RemoteAddr(), h.tlsConfig, h.quicConfig)
+	quicConn, err := quic.Dial(packetConn, udpConn.RemoteAddr(), h.serverAddr.AddrString(), h.tlsConfig, h.quicConfig)
 	if err != nil {
 		packetConn.Close()
 		return nil, err
@@ -262,19 +260,13 @@ func (h *Hysteria) Close() error {
 	return nil
 }
 
-func (h *Hysteria) open(ctx context.Context, reconnect bool) (quic.Connection, quic.Stream, error) {
+func (h *Hysteria) open(ctx context.Context) (quic.Connection, quic.Stream, error) {
 	conn, err := h.offer(ctx)
 	if err != nil {
-		if nErr, ok := err.(net.Error); ok && !nErr.Temporary() && reconnect {
-			return h.open(ctx, false)
-		}
 		return nil, nil, err
 	}
 	stream, err := conn.OpenStream()
 	if err != nil {
-		if nErr, ok := err.(net.Error); ok && !nErr.Temporary() && reconnect {
-			return h.open(ctx, false)
-		}
 		return nil, nil, err
 	}
 	return conn, &hysteria.StreamWrapper{Stream: stream}, nil
@@ -284,7 +276,7 @@ func (h *Hysteria) DialContext(ctx context.Context, network string, destination
 	switch N.NetworkName(network) {
 	case N.NetworkTCP:
 		h.logger.InfoContext(ctx, "outbound connection to ", destination)
-		_, stream, err := h.open(ctx, true)
+		_, stream, err := h.open(ctx)
 		if err != nil {
 			return nil, err
 		}
@@ -310,7 +302,7 @@ func (h *Hysteria) DialContext(ctx context.Context, network string, destination
 
 func (h *Hysteria) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
 	h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
-	conn, stream, err := h.open(ctx, true)
+	conn, stream, err := h.open(ctx)
 	if err != nil {
 		return nil, err
 	}

outbound/selector.go

@@ -29,11 +29,10 @@ type Selector struct {
 func NewSelector(router adapter.Router, logger log.ContextLogger, tag string, options option.SelectorOutboundOptions) (*Selector, error) {
 	outbound := &Selector{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeSelector,
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: options.Outbounds,
+			protocol: C.TypeSelector,
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		tags:       options.Outbounds,
 		defaultTag: options.Default,

outbound/shadowsocks.go

@@ -11,7 +11,8 @@ import (
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-box/transport/sip003"
-	"github.com/sagernet/sing-shadowsocks2"
+	"github.com/sagernet/sing-shadowsocks"
+	"github.com/sagernet/sing-shadowsocks/shadowimpl"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/bufio"
 	E "github.com/sagernet/sing/common/exceptions"
@@ -33,20 +34,17 @@ type Shadowsocks struct {
 }
 
 func NewShadowsocks(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.ShadowsocksOutboundOptions) (*Shadowsocks, error) {
-	method, err := shadowsocks.CreateMethod(ctx, options.Method, shadowsocks.MethodOptions{
-		Password: options.Password,
-	})
+	method, err := shadowimpl.FetchMethod(options.Method, options.Password, router.TimeFunc())
 	if err != nil {
 		return nil, err
 	}
 	outbound := &Shadowsocks{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeShadowsocks,
-			network:      options.Network.Build(),
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeShadowsocks,
+			network:  options.Network.Build(),
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		dialer:     dialer.New(router, options.DialerOptions),
 		method:     method,
@@ -60,7 +58,7 @@ func NewShadowsocks(ctx context.Context, router adapter.Router, logger log.Conte
 	}
 	uotOptions := common.PtrValueOrDefault(options.UDPOverTCPOptions)
 	if !uotOptions.Enabled {
-		outbound.multiplexDialer, err = mux.NewClientWithOptions((*shadowsocksDialer)(outbound), common.PtrValueOrDefault(options.MultiplexOptions))
+		outbound.multiplexDialer, err = mux.NewClientWithOptions(ctx, (*shadowsocksDialer)(outbound), common.PtrValueOrDefault(options.MultiplexOptions))
 		if err != nil {
 			return nil, err
 		}

outbound/shadowsocksr.go

@@ -39,12 +39,11 @@ type ShadowsocksR struct {
 func NewShadowsocksR(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.ShadowsocksROutboundOptions) (*ShadowsocksR, error) {
 	outbound := &ShadowsocksR{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeShadowsocksR,
-			network:      options.Network.Build(),
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeShadowsocksR,
+			network:  options.Network.Build(),
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		dialer:     dialer.New(router, options.DialerOptions),
 		serverAddr: options.ServerOptions.Build(),

outbound/shadowtls.go

@@ -27,12 +27,11 @@ type ShadowTLS struct {
 func NewShadowTLS(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.ShadowTLSOutboundOptions) (*ShadowTLS, error) {
 	outbound := &ShadowTLS{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeShadowTLS,
-			network:      []string{N.NetworkTCP},
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeShadowTLS,
+			network:  []string{N.NetworkTCP},
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 	}
 	if options.TLS == nil || !options.TLS.Enabled {

outbound/socks.go

@@ -39,12 +39,11 @@ func NewSocks(router adapter.Router, logger log.ContextLogger, tag string, optio
 	}
 	outbound := &Socks{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeSocks,
-			network:      options.Network.Build(),
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeSocks,
+			network:  options.Network.Build(),
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		client:  socks.NewClient(dialer.New(router, options.DialerOptions), options.ServerOptions.Build(), version, options.Username, options.Password),
 		resolve: version == socks.Version4,

outbound/ssh.go

@@ -46,12 +46,11 @@ type SSH struct {
 func NewSSH(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.SSHOutboundOptions) (*SSH, error) {
 	outbound := &SSH{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeSSH,
-			network:      []string{N.NetworkTCP},
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeSSH,
+			network:  []string{N.NetworkTCP},
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		ctx:               ctx,
 		dialer:            dialer.New(router, options.DialerOptions),

outbound/tor.go

@@ -68,12 +68,11 @@ func NewTor(ctx context.Context, router adapter.Router, logger log.ContextLogger
 	}
 	return &Tor{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeTor,
-			network:      []string{N.NetworkTCP},
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeTor,
+			network:  []string{N.NetworkTCP},
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		ctx:       ctx,
 		proxy:     NewProxyListener(ctx, logger, dialer.New(router, options.DialerOptions)),

outbound/trojan.go

@@ -35,12 +35,11 @@ type Trojan struct {
 func NewTrojan(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.TrojanOutboundOptions) (*Trojan, error) {
 	outbound := &Trojan{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeTrojan,
-			network:      options.Network.Build(),
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeTrojan,
+			network:  options.Network.Build(),
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		dialer:     dialer.New(router, options.DialerOptions),
 		serverAddr: options.ServerOptions.Build(),
@@ -59,7 +58,7 @@ func NewTrojan(ctx context.Context, router adapter.Router, logger log.ContextLog
 			return nil, E.Cause(err, "create client transport: ", options.Transport.Type)
 		}
 	}
-	outbound.multiplexDialer, err = mux.NewClientWithOptions((*trojanDialer)(outbound), common.PtrValueOrDefault(options.Multiplex))
+	outbound.multiplexDialer, err = mux.NewClientWithOptions(ctx, (*trojanDialer)(outbound), common.PtrValueOrDefault(options.Multiplex))
 	if err != nil {
 		return nil, err
 	}

outbound/urltest.go

@@ -39,11 +39,10 @@ type URLTest struct {
 func NewURLTest(ctx context.Context, 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,
-			dependencies: options.Outbounds,
+			protocol: C.TypeURLTest,
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		ctx:       ctx,
 		tags:      options.Outbounds,
@@ -234,7 +233,7 @@ func (g *URLTestGroup) Fallback(used adapter.Outbound) []adapter.Outbound {
 			outbounds = append(outbounds, detour)
 		}
 	}
-	sort.SliceStable(outbounds, func(i, j int) bool {
+	sort.Slice(outbounds, func(i, j int) bool {
 		oi := outbounds[i]
 		oj := outbounds[j]
 		hi := g.history.LoadURLTestHistory(RealTag(oi))

outbound/vless.go

@@ -6,7 +6,6 @@ import (
 
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/common/dialer"
-	"github.com/sagernet/sing-box/common/mux"
 	"github.com/sagernet/sing-box/common/tls"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/log"
@@ -25,25 +24,23 @@ var _ adapter.Outbound = (*VLESS)(nil)
 
 type VLESS struct {
 	myOutboundAdapter
-	dialer          N.Dialer
-	client          *vless.Client
-	serverAddr      M.Socksaddr
-	multiplexDialer *mux.Client
-	tlsConfig       tls.Config
-	transport       adapter.V2RayClientTransport
-	packetAddr      bool
-	xudp            bool
+	dialer     N.Dialer
+	client     *vless.Client
+	serverAddr M.Socksaddr
+	tlsConfig  tls.Config
+	transport  adapter.V2RayClientTransport
+	packetAddr bool
+	xudp       bool
 }
 
 func NewVLESS(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.VLESSOutboundOptions) (*VLESS, error) {
 	outbound := &VLESS{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeVLESS,
-			network:      options.Network.Build(),
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeVLESS,
+			network:  options.Network.Build(),
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		dialer:     dialer.New(router, options.DialerOptions),
 		serverAddr: options.ServerOptions.Build(),
@@ -78,65 +75,10 @@ func NewVLESS(ctx context.Context, router adapter.Router, logger log.ContextLogg
 	if err != nil {
 		return nil, err
 	}
-	outbound.multiplexDialer, err = mux.NewClientWithOptions((*vlessDialer)(outbound), common.PtrValueOrDefault(options.Multiplex))
-	if err != nil {
-		return nil, err
-	}
 	return outbound, nil
 }
 
 func (h *VLESS) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
-	if h.multiplexDialer == nil {
-		switch N.NetworkName(network) {
-		case N.NetworkTCP:
-			h.logger.InfoContext(ctx, "outbound connection to ", destination)
-		case N.NetworkUDP:
-			h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
-		}
-		return (*vlessDialer)(h).DialContext(ctx, network, destination)
-	} else {
-		switch N.NetworkName(network) {
-		case N.NetworkTCP:
-			h.logger.InfoContext(ctx, "outbound multiplex connection to ", destination)
-		case N.NetworkUDP:
-			h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination)
-		}
-		return h.multiplexDialer.DialContext(ctx, network, destination)
-	}
-}
-
-func (h *VLESS) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
-	if h.multiplexDialer == nil {
-		h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
-		return (*vlessDialer)(h).ListenPacket(ctx, destination)
-	} else {
-		h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination)
-		return h.multiplexDialer.ListenPacket(ctx, destination)
-	}
-}
-
-func (h *VLESS) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
-	return NewConnection(ctx, h, conn, metadata)
-}
-
-func (h *VLESS) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
-	return NewPacketConnection(ctx, h, conn, metadata)
-}
-
-func (h *VLESS) InterfaceUpdated() error {
-	if h.multiplexDialer != nil {
-		h.multiplexDialer.Reset()
-	}
-	return nil
-}
-
-func (h *VLESS) Close() error {
-	return common.Close(common.PtrOrNil(h.multiplexDialer), h.transport)
-}
-
-type vlessDialer VLESS
-
-func (h *vlessDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
 	ctx, metadata := adapter.AppendContext(ctx)
 	metadata.Outbound = h.tag
 	metadata.Destination = destination
@@ -178,7 +120,7 @@ func (h *vlessDialer) DialContext(ctx context.Context, network string, destinati
 	}
 }
 
-func (h *vlessDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+func (h *VLESS) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
 	h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
 	ctx, metadata := adapter.AppendContext(ctx)
 	metadata.Outbound = h.tag
@@ -212,3 +154,15 @@ func (h *vlessDialer) ListenPacket(ctx context.Context, destination M.Socksaddr)
 		return h.client.DialEarlyPacketConn(conn, destination)
 	}
 }
+
+func (h *VLESS) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
+	return NewConnection(ctx, h, conn, metadata)
+}
+
+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)
+}

outbound/vmess.go

@@ -37,12 +37,11 @@ type VMess struct {
 func NewVMess(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.VMessOutboundOptions) (*VMess, error) {
 	outbound := &VMess{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeVMess,
-			network:      options.Network.Build(),
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeVMess,
+			network:  options.Network.Build(),
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 		dialer:     dialer.New(router, options.DialerOptions),
 		serverAddr: options.ServerOptions.Build(),
@@ -60,7 +59,7 @@ func NewVMess(ctx context.Context, router adapter.Router, logger log.ContextLogg
 			return nil, E.Cause(err, "create client transport: ", options.Transport.Type)
 		}
 	}
-	outbound.multiplexDialer, err = mux.NewClientWithOptions((*vmessDialer)(outbound), common.PtrValueOrDefault(options.Multiplex))
+	outbound.multiplexDialer, err = mux.NewClientWithOptions(ctx, (*vmessDialer)(outbound), common.PtrValueOrDefault(options.Multiplex))
 	if err != nil {
 		return nil, err
 	}

outbound/wireguard.go

@@ -8,7 +8,9 @@ import (
 	"encoding/hex"
 	"fmt"
 	"net"
+	"os"
 	"strings"
+	"syscall"
 
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/common/dialer"
@@ -26,7 +28,7 @@ import (
 )
 
 var (
-	_ adapter.Outbound                = (*WireGuard)(nil)
+	_ adapter.IPOutbound              = (*WireGuard)(nil)
 	_ adapter.InterfaceUpdateListener = (*WireGuard)(nil)
 )
 
@@ -34,18 +36,18 @@ type WireGuard struct {
 	myOutboundAdapter
 	bind      *wireguard.ClientBind
 	device    *device.Device
+	natDevice wireguard.NatDevice
 	tunDevice wireguard.Device
 }
 
 func NewWireGuard(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.WireGuardOutboundOptions) (*WireGuard, error) {
 	outbound := &WireGuard{
 		myOutboundAdapter: myOutboundAdapter{
-			protocol:     C.TypeWireGuard,
-			network:      options.Network.Build(),
-			router:       router,
-			logger:       logger,
-			tag:          tag,
-			dependencies: withDialerDependency(options.DialerOptions),
+			protocol: C.TypeWireGuard,
+			network:  options.Network.Build(),
+			router:   router,
+			logger:   logger,
+			tag:      tag,
 		},
 	}
 	var reserved [3]uint8
@@ -156,17 +158,25 @@ func NewWireGuard(ctx context.Context, router adapter.Router, logger log.Context
 	if mtu == 0 {
 		mtu = 1408
 	}
-	var wireTunDevice wireguard.Device
+	var tunDevice wireguard.Device
 	var err error
 	if !options.SystemInterface && tun.WithGVisor {
-		wireTunDevice, err = wireguard.NewStackDevice(localPrefixes, mtu)
+		tunDevice, err = wireguard.NewStackDevice(localPrefixes, mtu, options.IPRewrite)
 	} else {
-		wireTunDevice, err = wireguard.NewSystemDevice(router, options.InterfaceName, localPrefixes, mtu)
+		tunDevice, err = wireguard.NewSystemDevice(router, options.InterfaceName, localPrefixes, mtu)
 	}
 	if err != nil {
 		return nil, E.Cause(err, "create WireGuard device")
 	}
-	wgDevice := device.NewDevice(wireTunDevice, outbound.bind, &device.Logger{
+	natDevice, isNatDevice := tunDevice.(wireguard.NatDevice)
+	if !isNatDevice && router.NatRequired(tag) {
+		natDevice = wireguard.NewNATDevice(tunDevice, options.IPRewrite)
+	}
+	deviceInput := tunDevice
+	if natDevice != nil {
+		deviceInput = natDevice
+	}
+	wgDevice := device.NewDevice(deviceInput, outbound.bind, &device.Logger{
 		Verbosef: func(format string, args ...interface{}) {
 			logger.Debug(fmt.Sprintf(strings.ToLower(format), args...))
 		},
@@ -182,7 +192,8 @@ func NewWireGuard(ctx context.Context, router adapter.Router, logger log.Context
 		return nil, E.Cause(err, "setup wireguard")
 	}
 	outbound.device = wgDevice
-	outbound.tunDevice = wireTunDevice
+	outbound.natDevice = natDevice
+	outbound.tunDevice = tunDevice
 	return outbound, nil
 }
 
@@ -221,6 +232,27 @@ func (w *WireGuard) NewPacketConnection(ctx context.Context, conn N.PacketConn,
 	return NewPacketConnection(ctx, w, conn, metadata)
 }
 
+func (w *WireGuard) NewIPConnection(ctx context.Context, conn tun.RouteContext, metadata adapter.InboundContext) (tun.DirectDestination, error) {
+	if w.natDevice == nil {
+		return nil, os.ErrInvalid
+	}
+	session := tun.RouteSession{
+		IPVersion:   metadata.IPVersion,
+		Network:     tun.NetworkFromName(metadata.Network),
+		Source:      metadata.Source.AddrPort(),
+		Destination: metadata.Destination.AddrPort(),
+	}
+	switch session.Network {
+	case syscall.IPPROTO_TCP:
+		w.logger.InfoContext(ctx, "linked connection to ", metadata.Destination)
+	case syscall.IPPROTO_UDP:
+		w.logger.InfoContext(ctx, "linked packet connection to ", metadata.Destination)
+	default:
+		w.logger.InfoContext(ctx, "linked ", metadata.Network, " connection to ", metadata.Destination.AddrString())
+	}
+	return w.natDevice.CreateDestination(session, conn), nil
+}
+
 func (w *WireGuard) Start() error {
 	return w.tunDevice.Start()
 }

route/router.go

@@ -50,6 +50,7 @@ type Router struct {
 	outbounds                          []adapter.Outbound
 	outboundByTag                      map[string]adapter.Outbound
 	rules                              []adapter.Rule
+	ipRules                            []adapter.IPRule
 	defaultDetour                      string
 	defaultOutboundForConnection       adapter.Outbound
 	defaultOutboundForPacketConnection adapter.Outbound
@@ -98,6 +99,7 @@ func NewRouter(
 		dnsLogger:             logFactory.NewLogger("dns"),
 		outboundByTag:         make(map[string]adapter.Outbound),
 		rules:                 make([]adapter.Rule, 0, len(options.Rules)),
+		ipRules:               make([]adapter.IPRule, 0, len(options.IPRules)),
 		dnsRules:              make([]adapter.DNSRule, 0, len(dnsOptions.Rules)),
 		needGeoIPDatabase:     hasRule(options.Rules, isGeoIPRule) || hasDNSRule(dnsOptions.Rules, isGeoIPDNSRule),
 		needGeositeDatabase:   hasRule(options.Rules, isGeositeRule) || hasDNSRule(dnsOptions.Rules, isGeositeDNSRule),
@@ -111,12 +113,7 @@ func NewRouter(
 		defaultMark:           options.DefaultMark,
 		platformInterface:     platformInterface,
 	}
-	router.dnsClient = dns.NewClient(dns.ClientOptions{
-		DisableCache:     dnsOptions.DNSClientOptions.DisableCache,
-		DisableExpire:    dnsOptions.DNSClientOptions.DisableExpire,
-		IndependentCache: dnsOptions.DNSClientOptions.IndependentCache,
-		Logger:           router.dnsLogger,
-	})
+	router.dnsClient = dns.NewClient(dnsOptions.DNSClientOptions.DisableCache, dnsOptions.DNSClientOptions.DisableExpire, router.dnsLogger)
 	for i, ruleOptions := range options.Rules {
 		routeRule, err := NewRule(router, router.logger, ruleOptions)
 		if err != nil {
@@ -124,6 +121,13 @@ func NewRouter(
 		}
 		router.rules = append(router.rules, routeRule)
 	}
+	for i, ipRuleOptions := range options.IPRules {
+		ipRule, err := NewIPRule(router, router.logger, ipRuleOptions)
+		if err != nil {
+			return nil, E.Cause(err, "parse ip rule[", i, "]")
+		}
+		router.ipRules = append(router.ipRules, ipRule)
+	}
 	for i, dnsRuleOptions := range dnsOptions.Rules {
 		dnsRule, err := NewDNSRule(router, router.logger, dnsRuleOptions)
 		if err != nil {
@@ -270,8 +274,7 @@ func NewRouter(
 				router.networkMonitor = networkMonitor
 				networkMonitor.RegisterCallback(router.interfaceFinder.update)
 				interfaceMonitor, err := tun.NewDefaultInterfaceMonitor(router.networkMonitor, tun.DefaultInterfaceMonitorOptions{
-					OverrideAndroidVPN:    options.OverrideAndroidVPN,
-					UnderNetworkExtension: platformInterface != nil && platformInterface.UnderNetworkExtension(),
+					OverrideAndroidVPN: options.OverrideAndroidVPN,
 				})
 				if err != nil {
 					return nil, E.New("auto_detect_interface unsupported on current platform")
@@ -595,8 +598,7 @@ func (r *Router) RouteConnection(ctx context.Context, conn net.Conn, metadata ad
 	switch metadata.Destination.Fqdn {
 	case mux.Destination.Fqdn:
 		r.logger.InfoContext(ctx, "inbound multiplex connection")
-		handler := adapter.NewUpstreamHandler(metadata, r.RouteConnection, r.RoutePacketConnection, r)
-		return mux.HandleConnection(ctx, handler, r.logger, conn, adapter.UpstreamMetadata(metadata))
+		return mux.NewConnection(ctx, r, r, r.logger, conn, metadata)
 	case vmess.MuxDestination.Fqdn:
 		r.logger.InfoContext(ctx, "inbound legacy multiplex connection")
 		return vmess.HandleMuxConnection(ctx, conn, adapter.NewUpstreamHandler(metadata, r.RouteConnection, r.RoutePacketConnection, r))
@@ -629,7 +631,6 @@ func (r *Router) RouteConnection(ctx context.Context, conn net.Conn, metadata ad
 			Fqdn: domain,
 			Port: metadata.Destination.Port,
 		}
-		metadata.FakeIP = true
 		r.logger.DebugContext(ctx, "found fakeip domain: ", domain)
 	}
 
@@ -739,7 +740,6 @@ func (r *Router) RoutePacketConnection(ctx context.Context, conn N.PacketConn, m
 			Fqdn: domain,
 			Port: metadata.Destination.Port,
 		}
-		metadata.FakeIP = true
 		r.logger.DebugContext(ctx, "found fakeip domain: ", domain)
 	}
 
@@ -922,6 +922,10 @@ func (r *Router) Rules() []adapter.Rule {
 	return r.rules
 }
 
+func (r *Router) IPRules() []adapter.IPRule {
+	return r.ipRules
+}
+
 func (r *Router) NetworkMonitor() tun.NetworkUpdateMonitor {
 	return r.networkMonitor
 }
@@ -983,22 +987,9 @@ func (r *Router) notifyNetworkUpdate(int) error {
 		r.logger.Info("updated default interface ", r.interfaceMonitor.DefaultInterfaceName(netip.IPv4Unspecified()), ", index ", r.interfaceMonitor.DefaultInterfaceIndex(netip.IPv4Unspecified()))
 	}
 
-	conntrack.Close()
-
-	for _, outbound := range r.outbounds {
-		listener, isListener := outbound.(adapter.InterfaceUpdateListener)
-		if isListener {
-			err := listener.InterfaceUpdated()
-			if err != nil {
-				return err
-			}
-		}
-	}
-	return nil
-}
-
-func (r *Router) ResetNetwork() error {
-	conntrack.Close()
+	if conntrack.Enabled {
+		conntrack.Close()
+	}
 
 	for _, outbound := range r.outbounds {
 		listener, isListener := outbound.(adapter.InterfaceUpdateListener)

route/router_dns.go

@@ -44,27 +44,22 @@ func (r *Router) matchDNS(ctx context.Context) (context.Context, dns.Transport,
 	}
 	for i, rule := range r.dnsRules {
 		if rule.Match(metadata) {
-			detour := rule.Outbound()
-			transport, loaded := r.transportMap[detour]
-			if !loaded {
-				r.dnsLogger.ErrorContext(ctx, "transport not found: ", detour)
-				continue
-			}
-			if _, isFakeIP := transport.(adapter.FakeIPTransport); isFakeIP && metadata.FakeIP {
-				continue
-			}
-			r.dnsLogger.DebugContext(ctx, "match[", i, "] ", rule.String(), " => ", detour)
 			if rule.DisableCache() {
 				ctx = dns.ContextWithDisableCache(ctx, true)
 			}
 			if rewriteTTL := rule.RewriteTTL(); rewriteTTL != nil {
 				ctx = dns.ContextWithRewriteTTL(ctx, *rewriteTTL)
 			}
-			if domainStrategy, dsLoaded := r.transportDomainStrategy[transport]; dsLoaded {
-				return ctx, transport, domainStrategy
-			} else {
-				return ctx, transport, r.defaultDomainStrategy
+			detour := rule.Outbound()
+			r.dnsLogger.DebugContext(ctx, "match[", i, "] ", rule.String(), " => ", detour)
+			if transport, loaded := r.transportMap[detour]; loaded {
+				if domainStrategy, dsLoaded := r.transportDomainStrategy[transport]; dsLoaded {
+					return ctx, transport, domainStrategy
+				} else {
+					return ctx, transport, r.defaultDomainStrategy
+				}
 			}
+			r.dnsLogger.ErrorContext(ctx, "transport not found: ", detour)
 		}
 	}
 	if domainStrategy, dsLoaded := r.transportDomainStrategy[r.defaultTransport]; dsLoaded {
@@ -78,31 +73,23 @@ func (r *Router) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, er
 	if len(message.Question) > 0 {
 		r.dnsLogger.DebugContext(ctx, "exchange ", formatQuestion(message.Question[0].String()))
 	}
-	var (
-		response *mDNS.Msg
-		cached   bool
-		err      error
-	)
-	response, cached = r.dnsClient.ExchangeCache(ctx, message)
-	if !cached {
-		ctx, metadata := adapter.AppendContext(ctx)
-		if len(message.Question) > 0 {
-			metadata.QueryType = message.Question[0].Qtype
-			switch metadata.QueryType {
-			case mDNS.TypeA:
-				metadata.IPVersion = 4
-			case mDNS.TypeAAAA:
-				metadata.IPVersion = 6
-			}
-			metadata.Domain = fqdnToDomain(message.Question[0].Name)
-		}
-		ctx, transport, strategy := r.matchDNS(ctx)
-		ctx, cancel := context.WithTimeout(ctx, C.DNSTimeout)
-		defer cancel()
-		response, err = r.dnsClient.Exchange(ctx, transport, message, strategy)
-		if err != nil && len(message.Question) > 0 {
-			r.dnsLogger.ErrorContext(ctx, E.Cause(err, "exchange failed for ", formatQuestion(message.Question[0].String())))
+	ctx, metadata := adapter.AppendContext(ctx)
+	if len(message.Question) > 0 {
+		metadata.QueryType = message.Question[0].Qtype
+		switch metadata.QueryType {
+		case mDNS.TypeA:
+			metadata.IPVersion = 4
+		case mDNS.TypeAAAA:
+			metadata.IPVersion = 6
 		}
+		metadata.Domain = fqdnToDomain(message.Question[0].Name)
+	}
+	ctx, transport, strategy := r.matchDNS(ctx)
+	ctx, cancel := context.WithTimeout(ctx, C.DNSTimeout)
+	defer cancel()
+	response, err := r.dnsClient.Exchange(ctx, transport, message, strategy)
+	if err != nil && len(message.Question) > 0 {
+		r.dnsLogger.ErrorContext(ctx, E.Cause(err, "exchange failed for ", formatQuestion(message.Question[0].String())))
 	}
 	if len(message.Question) > 0 && response != nil {
 		LogDNSAnswers(r.dnsLogger, ctx, message.Question[0].Name, response.Answer)

route/router_ip.go

@@ -0,0 +1,79 @@
+package route
+
+import (
+	"context"
+	"strings"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-dns"
+	"github.com/sagernet/sing-tun"
+	F "github.com/sagernet/sing/common/format"
+	M "github.com/sagernet/sing/common/metadata"
+)
+
+func (r *Router) RouteIPConnection(ctx context.Context, conn tun.RouteContext, metadata adapter.InboundContext) tun.RouteAction {
+	if r.fakeIPStore != nil && r.fakeIPStore.Contains(metadata.Destination.Addr) {
+		domain, loaded := r.fakeIPStore.Lookup(metadata.Destination.Addr)
+		if !loaded {
+			r.logger.ErrorContext(ctx, "missing fakeip context")
+			return (*tun.ActionReturn)(nil)
+		}
+		metadata.Destination = M.Socksaddr{
+			Fqdn: domain,
+			Port: metadata.Destination.Port,
+		}
+		r.logger.DebugContext(ctx, "found fakeip domain: ", domain)
+	}
+	if r.dnsReverseMapping != nil && metadata.Domain == "" {
+		domain, loaded := r.dnsReverseMapping.Query(metadata.Destination.Addr)
+		if loaded {
+			metadata.Domain = domain
+			r.logger.DebugContext(ctx, "found reserve mapped domain: ", metadata.Domain)
+		}
+	}
+	if metadata.Destination.IsFqdn() && dns.DomainStrategy(metadata.InboundOptions.DomainStrategy) != dns.DomainStrategyAsIS {
+		addresses, err := r.Lookup(adapter.WithContext(ctx, &metadata), metadata.Destination.Fqdn, dns.DomainStrategy(metadata.InboundOptions.DomainStrategy))
+		if err != nil {
+			r.logger.ErrorContext(ctx, err)
+			return (*tun.ActionReturn)(nil)
+		}
+		metadata.DestinationAddresses = addresses
+		r.dnsLogger.DebugContext(ctx, "resolved [", strings.Join(F.MapToString(metadata.DestinationAddresses), " "), "]")
+	}
+	for i, rule := range r.ipRules {
+		if rule.Match(&metadata) {
+			if rule.Action() == tun.ActionTypeBlock {
+				r.logger.InfoContext(ctx, "match[", i, "] ", rule.String(), " => block")
+				return (*tun.ActionBlock)(nil)
+			}
+			detour := rule.Outbound()
+			r.logger.InfoContext(ctx, "match[", i, "] ", rule.String(), " => ", detour)
+			outbound, loaded := r.Outbound(detour)
+			if !loaded {
+				r.logger.ErrorContext(ctx, "outbound not found: ", detour)
+				break
+			}
+			ipOutbound, loaded := outbound.(adapter.IPOutbound)
+			if !loaded {
+				r.logger.ErrorContext(ctx, "outbound have no ip connection support: ", detour)
+				break
+			}
+			destination, err := ipOutbound.NewIPConnection(ctx, conn, metadata)
+			if err != nil {
+				r.logger.ErrorContext(ctx, err)
+				break
+			}
+			return &tun.ActionDirect{DirectDestination: destination}
+		}
+	}
+	return (*tun.ActionReturn)(nil)
+}
+
+func (r *Router) NatRequired(outbound string) bool {
+	for _, ipRule := range r.ipRules {
+		if ipRule.Outbound() == outbound {
+			return true
+		}
+	}
+	return false
+}

route/rule_ip.go

@@ -0,0 +1,189 @@
+package route
+
+import (
+	"github.com/sagernet/sing-box/adapter"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing-tun"
+	"github.com/sagernet/sing/common"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+func NewIPRule(router adapter.Router, logger log.ContextLogger, options option.IPRule) (adapter.IPRule, error) {
+	switch options.Type {
+	case "", C.RuleTypeDefault:
+		if !options.DefaultOptions.IsValid() {
+			return nil, E.New("missing conditions")
+		}
+		if common.IsEmpty(options.DefaultOptions.Action) {
+			return nil, E.New("missing action")
+		}
+		return NewDefaultIPRule(router, logger, options.DefaultOptions)
+	case C.RuleTypeLogical:
+		if !options.LogicalOptions.IsValid() {
+			return nil, E.New("missing conditions")
+		}
+		if common.IsEmpty(options.DefaultOptions.Action) {
+			return nil, E.New("missing action")
+		}
+		return NewLogicalIPRule(router, logger, options.LogicalOptions)
+	default:
+		return nil, E.New("unknown rule type: ", options.Type)
+	}
+}
+
+var _ adapter.IPRule = (*DefaultIPRule)(nil)
+
+type DefaultIPRule struct {
+	abstractDefaultRule
+	action tun.ActionType
+}
+
+func NewDefaultIPRule(router adapter.Router, logger log.ContextLogger, options option.DefaultIPRule) (*DefaultIPRule, error) {
+	rule := &DefaultIPRule{
+		abstractDefaultRule: abstractDefaultRule{
+			invert:   options.Invert,
+			outbound: options.Outbound,
+		},
+		action: tun.ActionType(options.Action),
+	}
+	if len(options.Inbound) > 0 {
+		item := NewInboundRule(options.Inbound)
+		rule.items = append(rule.items, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if options.IPVersion > 0 {
+		switch options.IPVersion {
+		case 4, 6:
+			item := NewIPVersionItem(options.IPVersion == 6)
+			rule.items = append(rule.items, item)
+			rule.allItems = append(rule.allItems, item)
+		default:
+			return nil, E.New("invalid ip version: ", options.IPVersion)
+		}
+	}
+	if len(options.Network) > 0 {
+		item := NewNetworkItem(options.Network)
+		rule.items = append(rule.items, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.Domain) > 0 || len(options.DomainSuffix) > 0 {
+		item := NewDomainItem(options.Domain, options.DomainSuffix)
+		rule.destinationAddressItems = append(rule.destinationAddressItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.DomainKeyword) > 0 {
+		item := NewDomainKeywordItem(options.DomainKeyword)
+		rule.destinationAddressItems = append(rule.destinationAddressItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.DomainRegex) > 0 {
+		item, err := NewDomainRegexItem(options.DomainRegex)
+		if err != nil {
+			return nil, E.Cause(err, "domain_regex")
+		}
+		rule.destinationAddressItems = append(rule.destinationAddressItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.Geosite) > 0 {
+		item := NewGeositeItem(router, logger, options.Geosite)
+		rule.destinationAddressItems = append(rule.destinationAddressItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.SourceGeoIP) > 0 {
+		item := NewGeoIPItem(router, logger, true, options.SourceGeoIP)
+		rule.sourceAddressItems = append(rule.sourceAddressItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.GeoIP) > 0 {
+		item := NewGeoIPItem(router, logger, false, options.GeoIP)
+		rule.destinationAddressItems = append(rule.destinationAddressItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.SourceIPCIDR) > 0 {
+		item, err := NewIPCIDRItem(true, options.SourceIPCIDR)
+		if err != nil {
+			return nil, E.Cause(err, "source_ipcidr")
+		}
+		rule.sourceAddressItems = append(rule.sourceAddressItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.IPCIDR) > 0 {
+		item, err := NewIPCIDRItem(false, options.IPCIDR)
+		if err != nil {
+			return nil, E.Cause(err, "ipcidr")
+		}
+		rule.destinationAddressItems = append(rule.destinationAddressItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.SourcePort) > 0 {
+		item := NewPortItem(true, options.SourcePort)
+		rule.sourcePortItems = append(rule.sourcePortItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.SourcePortRange) > 0 {
+		item, err := NewPortRangeItem(true, options.SourcePortRange)
+		if err != nil {
+			return nil, E.Cause(err, "source_port_range")
+		}
+		rule.sourcePortItems = append(rule.sourcePortItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.Port) > 0 {
+		item := NewPortItem(false, options.Port)
+		rule.destinationPortItems = append(rule.destinationPortItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	if len(options.PortRange) > 0 {
+		item, err := NewPortRangeItem(false, options.PortRange)
+		if err != nil {
+			return nil, E.Cause(err, "port_range")
+		}
+		rule.destinationPortItems = append(rule.destinationPortItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
+	return rule, nil
+}
+
+func (r *DefaultIPRule) Action() tun.ActionType {
+	return r.action
+}
+
+var _ adapter.IPRule = (*LogicalIPRule)(nil)
+
+type LogicalIPRule struct {
+	abstractLogicalRule
+	action tun.ActionType
+}
+
+func NewLogicalIPRule(router adapter.Router, logger log.ContextLogger, options option.LogicalIPRule) (*LogicalIPRule, error) {
+	r := &LogicalIPRule{
+		abstractLogicalRule: abstractLogicalRule{
+			rules:    make([]adapter.Rule, len(options.Rules)),
+			invert:   options.Invert,
+			outbound: options.Outbound,
+		},
+		action: tun.ActionType(options.Action),
+	}
+	switch options.Mode {
+	case C.LogicalTypeAnd:
+		r.mode = C.LogicalTypeAnd
+	case C.LogicalTypeOr:
+		r.mode = C.LogicalTypeOr
+	default:
+		return nil, E.New("unknown logical mode: ", options.Mode)
+	}
+	for i, subRule := range options.Rules {
+		rule, err := NewDefaultIPRule(router, logger, subRule)
+		if err != nil {
+			return nil, E.Cause(err, "sub rule[", i, "]")
+		}
+		r.rules[i] = rule
+	}
+	return r, nil
+}
+
+func (r *LogicalIPRule) Action() tun.ActionType {
+	return r.action
+}

test/shadowsocks_legacy_test.go

@@ -1,53 +0,0 @@
-package main
-
-import (
-	"net/netip"
-	"testing"
-
-	C "github.com/sagernet/sing-box/constant"
-	"github.com/sagernet/sing-box/option"
-	"github.com/sagernet/sing-shadowsocks2/shadowstream"
-	F "github.com/sagernet/sing/common/format"
-)
-
-func TestShadowsocksLegacy(t *testing.T) {
-	testShadowsocksLegacy(t, shadowstream.MethodList[0])
-}
-
-func testShadowsocksLegacy(t *testing.T, method string) {
-	startDockerContainer(t, DockerOptions{
-		Image: ImageShadowsocksLegacy,
-		Ports: []uint16{serverPort},
-		Env: []string{
-			"SS_MODULE=ss-server",
-			F.ToString("SS_CONFIG=-s 0.0.0.0 -u -p 10000 -m ", method, " -k FzcLbKs2dY9mhL"),
-		},
-	})
-	startInstance(t, option.Options{
-		Inbounds: []option.Inbound{
-			{
-				Type: C.TypeMixed,
-				MixedOptions: option.HTTPMixedInboundOptions{
-					ListenOptions: option.ListenOptions{
-						Listen:     option.NewListenAddress(netip.IPv4Unspecified()),
-						ListenPort: clientPort,
-					},
-				},
-			},
-		},
-		Outbounds: []option.Outbound{
-			{
-				Type: C.TypeShadowsocks,
-				ShadowsocksOptions: option.ShadowsocksOutboundOptions{
-					ServerOptions: option.ServerOptions{
-						Server:     "127.0.0.1",
-						ServerPort: serverPort,
-					},
-					Method:   method,
-					Password: "FzcLbKs2dY9mhL",
-				},
-			},
-		},
-	})
-	testSuitSimple(t, clientPort, testPort)
-}

test/shadowsocks_test.go

@@ -40,10 +40,6 @@ func TestShadowsocks(t *testing.T) {
 	}
 }
 
-func TestShadowsocksNone(t *testing.T) {
-	testShadowsocksSelf(t, "none", "")
-}
-
 func TestShadowsocks2022(t *testing.T) {
 	for _, method16 := range []string{
 		"2022-blake3-aes-128-gcm",

transport/fakeip/packet_wait.go

@@ -1,37 +0,0 @@
-package fakeip
-
-import (
-	"github.com/sagernet/sing/common/buf"
-	"github.com/sagernet/sing/common/bufio"
-	M "github.com/sagernet/sing/common/metadata"
-	N "github.com/sagernet/sing/common/network"
-)
-
-func (c *NATPacketConn) CreatePacketReadWaiter() (N.PacketReadWaiter, bool) {
-	waiter, created := bufio.CreatePacketReadWaiter(c.PacketConn)
-	if !created {
-		return nil, false
-	}
-	return &waitNATPacketConn{c, waiter}, true
-}
-
-type waitNATPacketConn struct {
-	*NATPacketConn
-	waiter N.PacketReadWaiter
-}
-
-func (c *waitNATPacketConn) InitializeReadWaiter(newBuffer func() *buf.Buffer) {
-	c.waiter.InitializeReadWaiter(newBuffer)
-}
-
-func (c *waitNATPacketConn) WaitReadPacket() (destination M.Socksaddr, err error) {
-	destination, err = c.waiter.WaitReadPacket()
-	if socksaddrWithoutPort(destination) == c.origin {
-		destination = M.Socksaddr{
-			Addr: c.destination.Addr,
-			Fqdn: c.destination.Fqdn,
-			Port: destination.Port,
-		}
-	}
-	return
-}

transport/fakeip/server.go

@@ -14,16 +14,13 @@ import (
 	mDNS "github.com/miekg/dns"
 )
 
-var (
-	_ dns.Transport           = (*Transport)(nil)
-	_ adapter.FakeIPTransport = (*Transport)(nil)
-)
+var _ dns.Transport = (*Server)(nil)
 
 func init() {
 	dns.RegisterTransport([]string{"fakeip"}, NewTransport)
 }
 
-type Transport struct {
+type Server struct {
 	name   string
 	router adapter.Router
 	store  adapter.FakeIPStore
@@ -35,18 +32,18 @@ func NewTransport(name string, ctx context.Context, logger logger.ContextLogger,
 	if router == nil {
 		return nil, E.New("missing router in context")
 	}
-	return &Transport{
+	return &Server{
 		name:   name,
 		router: router,
 		logger: logger,
 	}, nil
 }
 
-func (s *Transport) Name() string {
+func (s *Server) Name() string {
 	return s.name
 }
 
-func (s *Transport) Start() error {
+func (s *Server) Start() error {
 	s.store = s.router.FakeIPStore()
 	if s.store == nil {
 		return E.New("fakeip not enabled")
@@ -54,19 +51,19 @@ func (s *Transport) Start() error {
 	return nil
 }
 
-func (s *Transport) Close() error {
+func (s *Server) Close() error {
 	return nil
 }
 
-func (s *Transport) Raw() bool {
+func (s *Server) Raw() bool {
 	return false
 }
 
-func (s *Transport) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, error) {
+func (s *Server) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, error) {
 	return nil, os.ErrInvalid
 }
 
-func (s *Transport) Lookup(ctx context.Context, domain string, strategy dns.DomainStrategy) ([]netip.Addr, error) {
+func (s *Server) Lookup(ctx context.Context, domain string, strategy dns.DomainStrategy) ([]netip.Addr, error) {
 	var addresses []netip.Addr
 	if strategy != dns.DomainStrategyUseIPv6 {
 		inet4Address, err := s.store.Create(domain, dns.DomainStrategyUseIPv4)
@@ -84,7 +81,3 @@ func (s *Transport) Lookup(ctx context.Context, domain string, strategy dns.Doma
 	}
 	return addresses, nil
 }
-
-func (s *Transport) Store() adapter.FakeIPStore {
-	return s.store
-}

transport/hysteria/protocol.go

@@ -343,7 +343,7 @@ func WriteUDPMessage(conn quic.Connection, message UDPMessage) error {
 	buffer := common.Dup(_buffer)
 	defer buffer.Release()
 	err := writeUDPMessage(conn, message, buffer)
-	if errSize, ok := err.(quic.ErrMessageTooLarge); ok {
+	if errSize, ok := err.(quic.ErrMessageToLarge); ok {
 		// need to frag
 		message.MsgID = uint16(rand.Intn(0xFFFF)) + 1 // msgID must be > 0 when fragCount > 1
 		fragMsgs := FragUDPMessage(message, int(errSize))

transport/trojan/protocol.go

@@ -309,7 +309,7 @@ func ReadPacket(conn net.Conn, buffer *buf.Buffer) (M.Socksaddr, error) {
 	}
 
 	_, err = buffer.ReadFullFrom(conn, int(length))
-	return destination.Unwrap(), err
+	return destination, err
 }
 
 func WritePacket(conn net.Conn, buffer *buf.Buffer, destination M.Socksaddr) error {

transport/v2rayquic/client.go

@@ -75,7 +75,7 @@ func (c *Client) offerNew() (quic.Connection, error) {
 	}
 	var packetConn net.PacketConn
 	packetConn = bufio.NewUnbindPacketConn(udpConn)
-	quicConn, err := quic.Dial(c.ctx, packetConn, udpConn.RemoteAddr(), c.tlsConfig, c.quicConfig)
+	quicConn, err := quic.Dial(packetConn, udpConn.RemoteAddr(), c.serverAddr.AddrString(), c.tlsConfig, c.quicConfig)
 	if err != nil {
 		packetConn.Close()
 		return nil, err

transport/v2rayquic/server.go

@@ -26,7 +26,7 @@ type Server struct {
 	handler      adapter.V2RayServerTransportHandler
 	errorHandler E.Handler
 	udpListener  net.PacketConn
-	quicListener *quic.Listener
+	quicListener quic.Listener
 }
 
 func NewServer(ctx context.Context, options option.V2RayQUICOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (adapter.V2RayServerTransport, error) {

transport/v2raywebsocket/client.go

@@ -42,19 +42,11 @@ func NewClient(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, opt
 			if err != nil {
 				return nil, err
 			}
-			tlsConn, err := tls.ClientHandshake(ctx, conn, tlsConfig)
-			if err != nil {
-				return nil, err
-			}
-			return &deadConn{tlsConn}, nil
+			return tls.ClientHandshake(ctx, conn, tlsConfig)
 		}
 	} else {
 		wsDialer.NetDialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
-			conn, err := dialer.DialContext(ctx, network, M.ParseSocksaddr(addr))
-			if err != nil {
-				return nil, err
-			}
-			return &deadConn{conn}, nil
+			return dialer.DialContext(ctx, network, M.ParseSocksaddr(addr))
 		}
 	}
 	var uri url.URL

transport/v2raywebsocket/deadline.go

@@ -1,22 +0,0 @@
-package v2raywebsocket
-
-import (
-	"net"
-	"time"
-)
-
-type deadConn struct {
-	net.Conn
-}
-
-func (c *deadConn) SetDeadline(t time.Time) error {
-	return nil
-}
-
-func (c *deadConn) SetReadDeadline(t time.Time) error {
-	return nil
-}
-
-func (c *deadConn) SetWriteDeadline(t time.Time) error {
-	return nil
-}

transport/vless/protocol.go

@@ -130,7 +130,7 @@ func WriteRequest(writer io.Writer, request Request, payload []byte) error {
 	var addonsLen int
 	if request.Flow != "" {
 		addonsLen += 1 // protobuf header
-		addonsLen += rw.UVariantLen(uint64(len(request.Flow)))
+		addonsLen += UvarintLen(uint64(len(request.Flow)))
 		addonsLen += len(request.Flow)
 		requestLen += addonsLen
 	}
@@ -150,8 +150,8 @@ func WriteRequest(writer io.Writer, request Request, payload []byte) error {
 	)
 	if addonsLen > 0 {
 		common.Must(buffer.WriteByte(10))
-		binary.PutUvarint(buffer.Extend(rw.UVariantLen(uint64(len(request.Flow)))), uint64(len(request.Flow)))
-		common.Must(common.Error(buffer.WriteString(request.Flow)))
+		binary.PutUvarint(buffer.Extend(UvarintLen(uint64(len(request.Flow)))), uint64(len(request.Flow)))
+		common.Must(common.Error(buffer.Write([]byte(request.Flow))))
 	}
 	common.Must(
 		buffer.WriteByte(request.Command),
@@ -174,7 +174,7 @@ func EncodeRequest(request Request, buffer *buf.Buffer) {
 	var addonsLen int
 	if request.Flow != "" {
 		addonsLen += 1 // protobuf header
-		addonsLen += rw.UVariantLen(uint64(len(request.Flow)))
+		addonsLen += UvarintLen(uint64(len(request.Flow)))
 		addonsLen += len(request.Flow)
 		requestLen += addonsLen
 	}
@@ -189,8 +189,8 @@ func EncodeRequest(request Request, buffer *buf.Buffer) {
 	)
 	if addonsLen > 0 {
 		common.Must(buffer.WriteByte(10))
-		binary.PutUvarint(buffer.Extend(rw.UVariantLen(uint64(len(request.Flow)))), uint64(len(request.Flow)))
-		common.Must(common.Error(buffer.WriteString(request.Flow)))
+		binary.PutUvarint(buffer.Extend(UvarintLen(uint64(len(request.Flow)))), uint64(len(request.Flow)))
+		common.Must(common.Error(buffer.Write([]byte(request.Flow))))
 	}
 	common.Must(
 		buffer.WriteByte(request.Command),
@@ -210,7 +210,7 @@ func RequestLen(request Request) int {
 	var addonsLen int
 	if request.Flow != "" {
 		addonsLen += 1 // protobuf header
-		addonsLen += rw.UVariantLen(uint64(len(request.Flow)))
+		addonsLen += UvarintLen(uint64(len(request.Flow)))
 		addonsLen += len(request.Flow)
 		requestLen += addonsLen
 	}
@@ -229,7 +229,7 @@ func WritePacketRequest(writer io.Writer, request Request, payload []byte) error
 	var addonsLen int
 	/*if request.Flow != "" {
 		addonsLen += 1 // protobuf header
-		addonsLen += rw.UVariantLen(uint64(len(request.Flow)))
+		addonsLen += UvarintLen(uint64(len(request.Flow)))
 		addonsLen += len(request.Flow)
 		requestLen += addonsLen
 	}*/
@@ -251,8 +251,8 @@ func WritePacketRequest(writer io.Writer, request Request, payload []byte) error
 
 	if addonsLen > 0 {
 		common.Must(buffer.WriteByte(10))
-		binary.PutUvarint(buffer.Extend(rw.UVariantLen(uint64(len(request.Flow)))), uint64(len(request.Flow)))
-		common.Must(common.Error(buffer.WriteString(request.Flow)))
+		binary.PutUvarint(buffer.Extend(UvarintLen(uint64(len(request.Flow)))), uint64(len(request.Flow)))
+		common.Must(common.Error(buffer.Write([]byte(request.Flow))))
 	}
 
 	common.Must(
@@ -290,3 +290,8 @@ func ReadResponse(reader io.Reader) error {
 	}
 	return nil
 }
+
+func UvarintLen(value uint64) int {
+	var buffer [binary.MaxVarintLen64]byte
+	return binary.PutUvarint(buffer[:], value)
+}

transport/wireguard/device.go

@@ -1,13 +1,23 @@
 package wireguard
 
 import (
+	"net/netip"
+
+	"github.com/sagernet/sing-tun"
 	N "github.com/sagernet/sing/common/network"
-	"github.com/sagernet/wireguard-go/tun"
+	wgTun "github.com/sagernet/wireguard-go/tun"
 )
 
 type Device interface {
-	tun.Device
+	wgTun.Device
 	N.Dialer
 	Start() error
+	Inet4Address() netip.Addr
+	Inet6Address() netip.Addr
 	// NewEndpoint() (stack.LinkEndpoint, error)
 }
+
+type NatDevice interface {
+	Device
+	CreateDestination(session tun.RouteSession, conn tun.RouteContext) tun.DirectDestination
+}

transport/wireguard/device_nat.go

@@ -0,0 +1,76 @@
+package wireguard
+
+import (
+	"github.com/sagernet/sing-tun"
+	"github.com/sagernet/sing/common/buf"
+)
+
+var _ Device = (*natDeviceWrapper)(nil)
+
+type natDeviceWrapper struct {
+	Device
+	outbound chan *buf.Buffer
+	mapping  *tun.NatMapping
+	writer   *tun.NatWriter
+}
+
+func NewNATDevice(upstream Device, ipRewrite bool) NatDevice {
+	wrapper := &natDeviceWrapper{
+		Device:   upstream,
+		outbound: make(chan *buf.Buffer, 256),
+		mapping:  tun.NewNatMapping(ipRewrite),
+	}
+	if ipRewrite {
+		wrapper.writer = tun.NewNatWriter(upstream.Inet4Address(), upstream.Inet6Address())
+	}
+	return wrapper
+}
+
+func (d *natDeviceWrapper) Read(bufs [][]byte, sizes []int, offset int) (count int, err error) {
+	select {
+	case packet := <-d.outbound:
+		defer packet.Release()
+		sizes[0] = copy(bufs[0][offset:], packet.Bytes())
+		return 1, nil
+	default:
+	}
+	return d.Device.Read(bufs, sizes, offset)
+}
+
+func (d *natDeviceWrapper) Write(bufs [][]byte, offset int) (count int, err error) {
+	packet := bufs[0][offset:]
+	handled, err := d.mapping.WritePacket(packet)
+	if handled {
+		return 1, err
+	}
+	return d.Device.Write(bufs, offset)
+}
+
+func (d *natDeviceWrapper) CreateDestination(session tun.RouteSession, conn tun.RouteContext) tun.DirectDestination {
+	d.mapping.CreateSession(session, conn)
+	return &natDestinationWrapper{d, session}
+}
+
+var _ tun.DirectDestination = (*natDestinationWrapper)(nil)
+
+type natDestinationWrapper struct {
+	device  *natDeviceWrapper
+	session tun.RouteSession
+}
+
+func (d *natDestinationWrapper) WritePacket(buffer *buf.Buffer) error {
+	if d.device.writer != nil {
+		d.device.writer.RewritePacket(buffer.Bytes())
+	}
+	d.device.outbound <- buffer
+	return nil
+}
+
+func (d *natDestinationWrapper) Close() error {
+	d.device.mapping.DeleteSession(d.session)
+	return nil
+}
+
+func (d *natDestinationWrapper) Timeout() bool {
+	return false
+}

transport/wireguard/device_nat_gvisor.go

@@ -0,0 +1,27 @@
+//go:build with_gvisor
+
+package wireguard
+
+import (
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/buf"
+
+	"gvisor.dev/gvisor/pkg/tcpip/stack"
+)
+
+func (d *natDestinationWrapper) WritePacketBuffer(buffer stack.PacketBufferPtr) error {
+	defer buffer.DecRef()
+	if d.device.writer != nil {
+		d.device.writer.RewritePacketBuffer(buffer)
+	}
+	var packetLen int
+	for _, slice := range buffer.AsSlices() {
+		packetLen += len(slice)
+	}
+	packet := buf.NewSize(packetLen)
+	for _, slice := range buffer.AsSlices() {
+		common.Must1(packet.Write(slice))
+	}
+	d.device.outbound <- packet
+	return nil
+}

transport/wireguard/device_stack.go

@@ -8,25 +8,26 @@ import (
 	"net/netip"
 	"os"
 
-	"github.com/sagernet/gvisor/pkg/buffer"
-	"github.com/sagernet/gvisor/pkg/tcpip"
-	"github.com/sagernet/gvisor/pkg/tcpip/adapters/gonet"
-	"github.com/sagernet/gvisor/pkg/tcpip/header"
-	"github.com/sagernet/gvisor/pkg/tcpip/network/ipv4"
-	"github.com/sagernet/gvisor/pkg/tcpip/network/ipv6"
-	"github.com/sagernet/gvisor/pkg/tcpip/stack"
-	"github.com/sagernet/gvisor/pkg/tcpip/transport/icmp"
-	"github.com/sagernet/gvisor/pkg/tcpip/transport/tcp"
-	"github.com/sagernet/gvisor/pkg/tcpip/transport/udp"
 	"github.com/sagernet/sing-tun"
 	"github.com/sagernet/sing/common/buf"
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
 	wgTun "github.com/sagernet/wireguard-go/tun"
+
+	"gvisor.dev/gvisor/pkg/bufferv2"
+	"gvisor.dev/gvisor/pkg/tcpip"
+	"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
+	"gvisor.dev/gvisor/pkg/tcpip/header"
+	"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
+	"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
+	"gvisor.dev/gvisor/pkg/tcpip/stack"
+	"gvisor.dev/gvisor/pkg/tcpip/transport/icmp"
+	"gvisor.dev/gvisor/pkg/tcpip/transport/tcp"
+	"gvisor.dev/gvisor/pkg/tcpip/transport/udp"
 )
 
-var _ Device = (*StackDevice)(nil)
+var _ NatDevice = (*StackDevice)(nil)
 
 const defaultNIC tcpip.NICID = 1
 
@@ -40,9 +41,11 @@ type StackDevice struct {
 	dispatcher     stack.NetworkDispatcher
 	addr4          tcpip.Address
 	addr6          tcpip.Address
+	mapping        *tun.NatMapping
+	writer         *tun.NatWriter
 }
 
-func NewStackDevice(localAddresses []netip.Prefix, mtu uint32) (*StackDevice, error) {
+func NewStackDevice(localAddresses []netip.Prefix, mtu uint32, ipRewrite bool) (*StackDevice, error) {
 	ipStack := stack.New(stack.Options{
 		NetworkProtocols:   []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol},
 		TransportProtocols: []stack.TransportProtocolFactory{tcp.NewProtocol, udp.NewProtocol, icmp.NewProtocol4, icmp.NewProtocol6},
@@ -55,13 +58,14 @@ func NewStackDevice(localAddresses []netip.Prefix, mtu uint32) (*StackDevice, er
 		outbound:       make(chan stack.PacketBufferPtr, 256),
 		packetOutbound: make(chan *buf.Buffer, 256),
 		done:           make(chan struct{}),
+		mapping:        tun.NewNatMapping(ipRewrite),
 	}
 	err := ipStack.CreateNIC(defaultNIC, (*wireEndpoint)(tunDevice))
 	if err != nil {
 		return nil, E.New(err.String())
 	}
 	for _, prefix := range localAddresses {
-		addr := tun.AddressFromAddr(prefix.Addr())
+		addr := tcpip.Address(prefix.Addr().AsSlice())
 		protoAddr := tcpip.ProtocolAddress{
 			AddressWithPrefix: tcpip.AddressWithPrefix{
 				Address:   addr,
@@ -80,6 +84,9 @@ func NewStackDevice(localAddresses []netip.Prefix, mtu uint32) (*StackDevice, er
 			return nil, E.New("parse local address ", protoAddr.AddressWithPrefix, ": ", err.String())
 		}
 	}
+	if ipRewrite {
+		tunDevice.writer = tun.NewNatWriter(tunDevice.Inet4Address(), tunDevice.Inet6Address())
+	}
 	sOpt := tcpip.TCPSACKEnabled(true)
 	ipStack.SetTransportProtocolOption(tcp.ProtocolNumber, &sOpt)
 	cOpt := tcpip.CongestionControlOption("cubic")
@@ -97,7 +104,7 @@ func (w *StackDevice) DialContext(ctx context.Context, network string, destinati
 	addr := tcpip.FullAddress{
 		NIC:  defaultNIC,
 		Port: destination.Port,
-		Addr: tun.AddressFromAddr(destination.Addr),
+		Addr: tcpip.Address(destination.Addr.AsSlice()),
 	}
 	bind := tcpip.FullAddress{
 		NIC: defaultNIC,
@@ -112,7 +119,7 @@ func (w *StackDevice) DialContext(ctx context.Context, network string, destinati
 	}
 	switch N.NetworkName(network) {
 	case N.NetworkTCP:
-		tcpConn, err := DialTCPWithBind(ctx, w.stack, bind, addr, networkProtocol)
+		tcpConn, err := gonet.DialTCPWithBind(ctx, w.stack, bind, addr, networkProtocol)
 		if err != nil {
 			return nil, err
 		}
@@ -133,7 +140,7 @@ func (w *StackDevice) ListenPacket(ctx context.Context, destination M.Socksaddr)
 		NIC: defaultNIC,
 	}
 	var networkProtocol tcpip.NetworkProtocolNumber
-	if destination.IsIPv4() {
+	if destination.IsIPv4() || w.addr6 == "" {
 		networkProtocol = header.IPv4ProtocolNumber
 		bind.Addr = w.addr4
 	} else {
@@ -148,11 +155,11 @@ func (w *StackDevice) ListenPacket(ctx context.Context, destination M.Socksaddr)
 }
 
 func (w *StackDevice) Inet4Address() netip.Addr {
-	return tun.AddrFromAddress(w.addr4)
+	return M.AddrFromIP(net.IP(w.addr4))
 }
 
 func (w *StackDevice) Inet6Address() netip.Addr {
-	return tun.AddrFromAddress(w.addr6)
+	return M.AddrFromIP(net.IP(w.addr6))
 }
 
 func (w *StackDevice) Start() error {
@@ -196,6 +203,14 @@ func (w *StackDevice) Write(bufs [][]byte, offset int) (count int, err error) {
 		if len(b) == 0 {
 			continue
 		}
+		handled, err := w.mapping.WritePacket(b)
+		if handled {
+			count++
+			if err != nil {
+				return count, err
+			}
+			continue
+		}
 		var networkProtocol tcpip.NetworkProtocolNumber
 		switch header.IPVersion(b) {
 		case header.IPv4Version:
@@ -204,7 +219,7 @@ func (w *StackDevice) Write(bufs [][]byte, offset int) (count int, err error) {
 			networkProtocol = header.IPv6ProtocolNumber
 		}
 		packetBuffer := stack.NewPacketBuffer(stack.PacketBufferOptions{
-			Payload: buffer.MakeWithData(b),
+			Payload: bufferv2.MakeWithData(b),
 		})
 		w.dispatcher.DeliverNetworkPacket(networkProtocol, packetBuffer)
 		packetBuffer.DecRef()
@@ -248,6 +263,44 @@ func (w *StackDevice) BatchSize() int {
 	return 1
 }
 
+func (w *StackDevice) CreateDestination(session tun.RouteSession, conn tun.RouteContext) tun.DirectDestination {
+	w.mapping.CreateSession(session, conn)
+	return &stackNatDestination{
+		device:  w,
+		session: session,
+	}
+}
+
+type stackNatDestination struct {
+	device  *StackDevice
+	session tun.RouteSession
+}
+
+func (d *stackNatDestination) WritePacket(buffer *buf.Buffer) error {
+	if d.device.writer != nil {
+		d.device.writer.RewritePacket(buffer.Bytes())
+	}
+	d.device.packetOutbound <- buffer
+	return nil
+}
+
+func (d *stackNatDestination) WritePacketBuffer(buffer stack.PacketBufferPtr) error {
+	if d.device.writer != nil {
+		d.device.writer.RewritePacketBuffer(buffer)
+	}
+	d.device.outbound <- buffer
+	return nil
+}
+
+func (d *stackNatDestination) Close() error {
+	d.device.mapping.DeleteSession(d.session)
+	return nil
+}
+
+func (d *stackNatDestination) Timeout() bool {
+	return false
+}
+
 var _ stack.LinkEndpoint = (*wireEndpoint)(nil)
 
 type wireEndpoint StackDevice

transport/wireguard/device_stack_stub.go

@@ -8,6 +8,6 @@ import (
 	"github.com/sagernet/sing-tun"
 )
 
-func NewStackDevice(localAddresses []netip.Prefix, mtu uint32) (Device, error) {
+func NewStackDevice(localAddresses []netip.Prefix, mtu uint32, ipRewrite bool) (Device, error) {
 	return nil, tun.ErrGVisorNotIncluded
 }

transport/wireguard/gonet.go

@@ -1,79 +0,0 @@
-//go:build with_gvisor
-
-package wireguard
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"net"
-	"net/netip"
-	"time"
-
-	"github.com/sagernet/gvisor/pkg/tcpip"
-	"github.com/sagernet/gvisor/pkg/tcpip/adapters/gonet"
-	"github.com/sagernet/gvisor/pkg/tcpip/stack"
-	"github.com/sagernet/gvisor/pkg/tcpip/transport/tcp"
-	"github.com/sagernet/gvisor/pkg/waiter"
-	"github.com/sagernet/sing-tun"
-	M "github.com/sagernet/sing/common/metadata"
-)
-
-func DialTCPWithBind(ctx context.Context, s *stack.Stack, localAddr, remoteAddr tcpip.FullAddress, network tcpip.NetworkProtocolNumber) (*gonet.TCPConn, error) {
-	// Create TCP endpoint, then connect.
-	var wq waiter.Queue
-	ep, err := s.NewEndpoint(tcp.ProtocolNumber, network, &wq)
-	if err != nil {
-		return nil, errors.New(err.String())
-	}
-
-	// Create wait queue entry that notifies a channel.
-	//
-	// We do this unconditionally as Connect will always return an error.
-	waitEntry, notifyCh := waiter.NewChannelEntry(waiter.WritableEvents)
-	wq.EventRegister(&waitEntry)
-	defer wq.EventUnregister(&waitEntry)
-
-	select {
-	case <-ctx.Done():
-		return nil, ctx.Err()
-	default:
-	}
-
-	// Bind before connect if requested.
-	if localAddr != (tcpip.FullAddress{}) {
-		if err = ep.Bind(localAddr); err != nil {
-			return nil, fmt.Errorf("ep.Bind(%+v) = %s", localAddr, err)
-		}
-	}
-
-	err = ep.Connect(remoteAddr)
-	if _, ok := err.(*tcpip.ErrConnectStarted); ok {
-		select {
-		case <-ctx.Done():
-			ep.Close()
-			return nil, ctx.Err()
-		case <-notifyCh:
-		}
-
-		err = ep.LastError()
-	}
-	if err != nil {
-		ep.Close()
-		return nil, &net.OpError{
-			Op:   "connect",
-			Net:  "tcp",
-			Addr: M.SocksaddrFromNetIP(netip.AddrPortFrom(tun.AddrFromAddress(remoteAddr.Addr), remoteAddr.Port)).TCPAddr(),
-			Err:  errors.New(err.String()),
-		}
-	}
-
-	// sing-box added: set keepalive
-	ep.SocketOptions().SetKeepAlive(true)
-	keepAliveIdle := tcpip.KeepaliveIdleOption(15 * time.Second)
-	ep.SetSockOpt(&keepAliveIdle)
-	keepAliveInterval := tcpip.KeepaliveIntervalOption(15 * time.Second)
-	ep.SetSockOpt(&keepAliveInterval)
-
-	return gonet.NewTCPConn(&wq, ep), nil
-}