refactor: Extract services form router

adapter/experimental.go

@@ -4,28 +4,28 @@ import (
 	"bytes"
 	"context"
 	"encoding/binary"
-	"net"
 	"time"
 
 	"github.com/sagernet/sing-box/common/urltest"
 	"github.com/sagernet/sing-dns"
-	N "github.com/sagernet/sing/common/network"
 	"github.com/sagernet/sing/common/varbin"
 )
 
 type ClashServer interface {
-	Service
-	LegacyPreStarter
+	LifecycleService
+	ConnectionTracker
 	Mode() string
 	ModeList() []string
 	HistoryStorage() *urltest.HistoryStorage
-	RoutedConnection(ctx context.Context, conn net.Conn, metadata InboundContext, matchedRule Rule) (net.Conn, Tracker)
-	RoutedPacketConnection(ctx context.Context, conn N.PacketConn, metadata InboundContext, matchedRule Rule) (N.PacketConn, Tracker)
+}
+
+type V2RayServer interface {
+	LifecycleService
+	StatsService() ConnectionTracker
 }
 
 type CacheFile interface {
-	Service
-	LegacyPreStarter
+	LifecycleService
 
 	StoreFakeIP() bool
 	FakeIPStorage
@@ -94,10 +94,6 @@ func (s *SavedRuleSet) UnmarshalBinary(data []byte) error {
 	return nil
 }
 
-type Tracker interface {
-	Leave()
-}
-
 type OutboundGroup interface {
 	Outbound
 	Now() string
@@ -115,13 +111,3 @@ func OutboundTag(detour Outbound) string {
 	}
 	return detour.Tag()
 }
-
-type V2RayServer interface {
-	Service
-	StatsService() V2RayStatsService
-}
-
-type V2RayStatsService interface {
-	RoutedConnection(inbound string, outbound string, user string, conn net.Conn) net.Conn
-	RoutedPacketConnection(inbound string, outbound string, user string, conn N.PacketConn) N.PacketConn
-}

adapter/inbound.go

@@ -32,7 +32,7 @@ type InboundRegistry interface {
 }
 
 type InboundManager interface {
-	NewService
+	Lifecycle
 	Inbounds() []Inbound
 	Get(tag string) (Inbound, bool)
 	Remove(tag string) error

adapter/inbound/manager.go

@@ -44,7 +44,7 @@ func (m *Manager) Start(stage adapter.StartStage) error {
 	for _, inbound := range m.inbounds {
 		err := adapter.LegacyStart(inbound, stage)
 		if err != nil {
-			return E.Cause(err, stage.Action(), " inbound/", inbound.Type(), "[", inbound.Tag(), "]")
+			return E.Cause(err, stage, " inbound/", inbound.Type(), "[", inbound.Tag(), "]")
 		}
 	}
 	return nil
@@ -118,7 +118,7 @@ func (m *Manager) Create(ctx context.Context, router adapter.Router, logger log.
 		for _, stage := range adapter.ListStartStages {
 			err = adapter.LegacyStart(inbound, stage)
 			if err != nil {
-				return E.Cause(err, stage.Action(), " inbound/", inbound.Type(), "[", inbound.Tag(), "]")
+				return E.Cause(err, stage, " inbound/", inbound.Type(), "[", inbound.Tag(), "]")
 			}
 		}
 	}

adapter/lifecycle.go

@@ -1,5 +1,7 @@
 package adapter
 
+import E "github.com/sagernet/sing/common/exceptions"
+
 type StartStage uint8
 
 const (
@@ -16,7 +18,7 @@ var ListStartStages = []StartStage{
 	StartStateStarted,
 }
 
-func (s StartStage) Action() string {
+func (s StartStage) String() string {
 	switch s {
 	case StartStateInitialize:
 		return "initialize"
@@ -25,17 +27,38 @@ func (s StartStage) Action() string {
 	case StartStatePostStart:
 		return "post-start"
 	case StartStateStarted:
-		return "start-after-started"
+		return "finish-start"
 	default:
 		panic("unknown stage")
 	}
 }
 
-type NewService interface {
-	NewStarter
+type Lifecycle interface {
+	Start(stage StartStage) error
 	Close() error
 }
 
-type NewStarter interface {
-	Start(stage StartStage) error
+type LifecycleService interface {
+	Name() string
+	Lifecycle
+}
+
+func Start(stage StartStage, services ...Lifecycle) error {
+	for _, service := range services {
+		err := service.Start(stage)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func StartNamed(stage StartStage, services []LifecycleService) error {
+	for _, service := range services {
+		err := service.Start(stage)
+		if err != nil {
+			return E.Cause(err, stage.String(), " ", service.Name())
+		}
+	}
+	return nil
 }

adapter/lifecycle_legacy.go

@@ -1,13 +1,5 @@
 package adapter
 
-type LegacyPreStarter interface {
-	PreStart() error
-}
-
-type LegacyPostStarter interface {
-	PostStart() error
-}
-
 func LegacyStart(starter any, stage StartStage) error {
 	switch stage {
 	case StartStateInitialize:
@@ -22,7 +14,7 @@ func LegacyStart(starter any, stage StartStage) error {
 		}); isStarter {
 			return starter.Start()
 		}
-	case StartStatePostStart:
+	case StartStateStarted:
 		if postStarter, isPostStarter := starter.(interface {
 			PostStart() error
 		}); isPostStarter {
@@ -31,3 +23,27 @@ func LegacyStart(starter any, stage StartStage) error {
 	}
 	return nil
 }
+
+type lifecycleServiceWrapper struct {
+	Service
+	name string
+}
+
+func NewLifecycleService(service Service, name string) LifecycleService {
+	return &lifecycleServiceWrapper{
+		Service: service,
+		name:    name,
+	}
+}
+
+func (l *lifecycleServiceWrapper) Name() string {
+	return l.name
+}
+
+func (l *lifecycleServiceWrapper) Start(stage StartStage) error {
+	return LegacyStart(l.Service, stage)
+}
+
+func (l *lifecycleServiceWrapper) Close() error {
+	return l.Service.Close()
+}

adapter/network.go

@@ -6,7 +6,7 @@ import (
 )
 
 type NetworkManager interface {
-	NewService
+	Lifecycle
 	InterfaceFinder() control.InterfaceFinder
 	UpdateInterfaces() error
 	DefaultInterface() string

adapter/outbound.go

@@ -24,7 +24,7 @@ type OutboundRegistry interface {
 }
 
 type OutboundManager interface {
-	NewService
+	Lifecycle
 	Outbounds() []Outbound
 	Outbound(tag string) (Outbound, bool)
 	Default() Outbound

adapter/outbound/manager.go

@@ -61,7 +61,7 @@ func (m *Manager) Start(stage adapter.StartStage) error {
 		for _, outbound := range outbounds {
 			err := adapter.LegacyStart(outbound, stage)
 			if err != nil {
-				return E.Cause(err, stage.Action(), " outbound/", outbound.Type(), "[", outbound.Tag(), "]")
+				return E.Cause(err, stage, " outbound/", outbound.Type(), "[", outbound.Tag(), "]")
 			}
 		}
 	}
@@ -234,7 +234,7 @@ func (m *Manager) Create(ctx context.Context, router adapter.Router, logger log.
 		for _, stage := range adapter.ListStartStages {
 			err = adapter.LegacyStart(outbound, stage)
 			if err != nil {
-				return E.Cause(err, stage.Action(), " outbound/", outbound.Type(), "[", outbound.Tag(), "]")
+				return E.Cause(err, stage, " outbound/", outbound.Type(), "[", outbound.Tag(), "]")
 			}
 		}
 	}

adapter/router.go

@@ -19,7 +19,7 @@ import (
 )
 
 type Router interface {
-	NewService
+	Lifecycle
 
 	FakeIPStore() FakeIPStore
 
@@ -38,15 +38,16 @@ type Router interface {
 	ClearDNSCache()
 	Rules() []Rule
 
-	ClashServer() ClashServer
-	SetClashServer(server ClashServer)
-
-	V2RayServer() V2RayServer
-	SetV2RayServer(server V2RayServer)
+	SetTracker(tracker ConnectionTracker)
 
 	ResetNetwork()
 }
 
+type ConnectionTracker interface {
+	RoutedConnection(ctx context.Context, conn net.Conn, metadata InboundContext, matchedRule Rule, matchOutbound Outbound) net.Conn
+	RoutedPacketConnection(ctx context.Context, conn N.PacketConn, metadata InboundContext, matchedRule Rule, matchOutbound Outbound) N.PacketConn
+}
+
 // Deprecated: Use ConnectionRouterEx instead.
 type ConnectionRouter interface {
 	RouteConnection(ctx context.Context, conn net.Conn, metadata InboundContext) error

box.go

@@ -11,6 +11,7 @@ import (
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/adapter/inbound"
 	"github.com/sagernet/sing-box/adapter/outbound"
+	"github.com/sagernet/sing-box/common/dialer"
 	"github.com/sagernet/sing-box/common/taskmonitor"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/experimental"
@@ -23,6 +24,7 @@ import (
 	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
 	F "github.com/sagernet/sing/common/format"
+	"github.com/sagernet/sing/common/ntp"
 	"github.com/sagernet/sing/service"
 	"github.com/sagernet/sing/service/pause"
 )
@@ -30,17 +32,15 @@ import (
 var _ adapter.Service = (*Box)(nil)
 
 type Box struct {
-	createdAt    time.Time
-	router       adapter.Router
-	inbound      *inbound.Manager
-	outbound     *outbound.Manager
-	network      *route.NetworkManager
-	logFactory   log.Factory
-	logger       log.ContextLogger
-	preServices1 map[string]adapter.Service
-	preServices2 map[string]adapter.Service
-	postServices map[string]adapter.Service
-	done         chan struct{}
+	createdAt  time.Time
+	logFactory log.Factory
+	logger     log.ContextLogger
+	network    *route.NetworkManager
+	router     *route.Router
+	inbound    *inbound.Manager
+	outbound   *outbound.Manager
+	services   []adapter.LifecycleService
+	done       chan struct{}
 }
 
 type Options struct {
@@ -49,7 +49,11 @@ type Options struct {
 	PlatformLogWriter log.PlatformWriter
 }
 
-func Context(ctx context.Context, inboundRegistry adapter.InboundRegistry, outboundRegistry adapter.OutboundRegistry) context.Context {
+func Context(
+	ctx context.Context,
+	inboundRegistry adapter.InboundRegistry,
+	outboundRegistry adapter.OutboundRegistry,
+) context.Context {
 	if service.FromContext[option.InboundOptionsRegistry](ctx) == nil ||
 		service.FromContext[adapter.InboundRegistry](ctx) == nil {
 		ctx = service.ContextWith[option.InboundOptionsRegistry](ctx, inboundRegistry)
@@ -70,14 +74,17 @@ func New(options Options) (*Box, error) {
 		ctx = context.Background()
 	}
 	ctx = service.ContextWithDefaultRegistry(ctx)
+
 	inboundRegistry := service.FromContext[adapter.InboundRegistry](ctx)
 	if inboundRegistry == nil {
 		return nil, E.New("missing inbound registry in context")
 	}
+
 	outboundRegistry := service.FromContext[adapter.OutboundRegistry](ctx)
 	if outboundRegistry == nil {
 		return nil, E.New("missing outbound registry in context")
 	}
+
 	ctx = pause.WithDefaultManager(ctx)
 	experimentalOptions := common.PtrValueOrDefault(options.Experimental)
 	applyDebugOptions(common.PtrValueOrDefault(experimentalOptions.Debug))
@@ -109,17 +116,19 @@ func New(options Options) (*Box, error) {
 	if err != nil {
 		return nil, E.Cause(err, "create log factory")
 	}
+
 	routeOptions := common.PtrValueOrDefault(options.Route)
 	inboundManager := inbound.NewManager(logFactory.NewLogger("inbound"), inboundRegistry)
 	outboundManager := outbound.NewManager(logFactory.NewLogger("outbound"), outboundRegistry, routeOptions.Final)
-	ctx = service.ContextWith[adapter.InboundManager](ctx, inboundManager)
-	ctx = service.ContextWith[adapter.OutboundManager](ctx, outboundManager)
+	service.MustRegister[adapter.InboundManager](ctx, inboundManager)
+	service.MustRegister[adapter.OutboundManager](ctx, outboundManager)
+
 	networkManager, err := route.NewNetworkManager(ctx, logFactory.NewLogger("network"), routeOptions)
 	if err != nil {
 		return nil, E.Cause(err, "initialize network manager")
 	}
-	ctx = service.ContextWith[adapter.NetworkManager](ctx, networkManager)
-	router, err := route.NewRouter(ctx, logFactory, routeOptions, common.PtrValueOrDefault(options.DNS), common.PtrValueOrDefault(options.NTP))
+	service.MustRegister[adapter.NetworkManager](ctx, networkManager)
+	router, err := route.NewRouter(ctx, logFactory, routeOptions, common.PtrValueOrDefault(options.DNS))
 	if err != nil {
 		return nil, E.Cause(err, "initialize router")
 	}
@@ -182,47 +191,61 @@ func New(options Options) (*Box, error) {
 			return nil, E.Cause(err, "initialize platform interface")
 		}
 	}
-	preServices1 := make(map[string]adapter.Service)
-	preServices2 := make(map[string]adapter.Service)
-	postServices := make(map[string]adapter.Service)
+	var services []adapter.LifecycleService
 	if needCacheFile {
-		cacheFile := service.FromContext[adapter.CacheFile](ctx)
-		if cacheFile == nil {
-			cacheFile = cachefile.New(ctx, common.PtrValueOrDefault(experimentalOptions.CacheFile))
-			service.MustRegister[adapter.CacheFile](ctx, cacheFile)
-		}
-		preServices1["cache file"] = cacheFile
+		cacheFile := cachefile.New(ctx, common.PtrValueOrDefault(experimentalOptions.CacheFile))
+		service.MustRegister[adapter.CacheFile](ctx, cacheFile)
+		services = append(services, cacheFile)
 	}
 	if needClashAPI {
 		clashAPIOptions := common.PtrValueOrDefault(experimentalOptions.ClashAPI)
 		clashAPIOptions.ModeList = experimental.CalculateClashModeList(options.Options)
 		clashServer, err := experimental.NewClashServer(ctx, logFactory.(log.ObservableFactory), clashAPIOptions)
 		if err != nil {
-			return nil, E.Cause(err, "create clash api server")
+			return nil, E.Cause(err, "create clash-server")
 		}
-		router.SetClashServer(clashServer)
-		preServices2["clash api"] = clashServer
+		router.SetTracker(clashServer)
+		service.MustRegister[adapter.ClashServer](ctx, clashServer)
+		services = append(services, clashServer)
 	}
 	if needV2RayAPI {
 		v2rayServer, err := experimental.NewV2RayServer(logFactory.NewLogger("v2ray-api"), common.PtrValueOrDefault(experimentalOptions.V2RayAPI))
 		if err != nil {
-			return nil, E.Cause(err, "create v2ray api server")
+			return nil, E.Cause(err, "create v2ray-server")
+		}
+		if v2rayServer.StatsService() != nil {
+			router.SetTracker(v2rayServer.StatsService())
+			services = append(services, v2rayServer)
+			service.MustRegister[adapter.V2RayServer](ctx, v2rayServer)
+		}
+	}
+	ntpOptions := common.PtrValueOrDefault(options.NTP)
+	if ntpOptions.Enabled {
+		ntpDialer, err := dialer.New(ctx, ntpOptions.DialerOptions)
+		if err != nil {
+			return nil, E.Cause(err, "create NTP service")
 		}
-		router.SetV2RayServer(v2rayServer)
-		preServices2["v2ray api"] = v2rayServer
+		timeService := ntp.NewService(ntp.Options{
+			Context:       ctx,
+			Dialer:        ntpDialer,
+			Logger:        logFactory.NewLogger("ntp"),
+			Server:        ntpOptions.ServerOptions.Build(),
+			Interval:      time.Duration(ntpOptions.Interval),
+			WriteToSystem: ntpOptions.WriteToSystem,
+		})
+		service.MustRegister[ntp.TimeService](ctx, timeService)
+		services = append(services, adapter.NewLifecycleService(timeService, "ntp service"))
 	}
 	return &Box{
-		router:       router,
-		inbound:      inboundManager,
-		outbound:     outboundManager,
-		network:      networkManager,
-		createdAt:    createdAt,
-		logFactory:   logFactory,
-		logger:       logFactory.Logger(),
-		preServices1: preServices1,
-		preServices2: preServices2,
-		postServices: postServices,
-		done:         make(chan struct{}),
+		network:    networkManager,
+		router:     router,
+		inbound:    inboundManager,
+		outbound:   outboundManager,
+		createdAt:  createdAt,
+		logFactory: logFactory,
+		logger:     logFactory.Logger(),
+		services:   services,
+		done:       make(chan struct{}),
 	}, nil
 }
 
@@ -272,43 +295,19 @@ func (s *Box) preStart() error {
 	if err != nil {
 		return E.Cause(err, "start logger")
 	}
-	for serviceName, service := range s.preServices1 {
-		if preService, isPreService := service.(adapter.LegacyPreStarter); isPreService {
-			monitor.Start("pre-start ", serviceName)
-			err := preService.PreStart()
-			monitor.Finish()
-			if err != nil {
-				return E.Cause(err, "pre-start ", serviceName)
-			}
-		}
-	}
-	for serviceName, service := range s.preServices2 {
-		if preService, isPreService := service.(adapter.LegacyPreStarter); isPreService {
-			monitor.Start("pre-start ", serviceName)
-			err := preService.PreStart()
-			monitor.Finish()
-			if err != nil {
-				return E.Cause(err, "pre-start ", serviceName)
-			}
-		}
-	}
-	err = s.network.Start(adapter.StartStateInitialize)
-	if err != nil {
-		return E.Cause(err, "initialize network manager")
-	}
-	err = s.router.Start(adapter.StartStateInitialize)
+	err = adapter.StartNamed(adapter.StartStateInitialize, s.services) // cache-file clash-api v2ray-api
 	if err != nil {
-		return E.Cause(err, "initialize router")
+		return err
 	}
-	err = s.outbound.Start(adapter.StartStateStart)
+	err = adapter.Start(adapter.StartStateInitialize, s.network, s.router, s.outbound, s.inbound)
 	if err != nil {
 		return err
 	}
-	err = s.network.Start(adapter.StartStateStart)
+	err = adapter.Start(adapter.StartStateStart, s.outbound, s.network, s.router)
 	if err != nil {
 		return err
 	}
-	return s.router.Start(adapter.StartStateStart)
+	return nil
 }
 
 func (s *Box) start() error {
@@ -316,57 +315,27 @@ func (s *Box) start() error {
 	if err != nil {
 		return err
 	}
-	for serviceName, service := range s.preServices1 {
-		err = service.Start()
-		if err != nil {
-			return E.Cause(err, "start ", serviceName)
-		}
-	}
-	for serviceName, service := range s.preServices2 {
-		err = service.Start()
-		if err != nil {
-			return E.Cause(err, "start ", serviceName)
-		}
-	}
-	err = s.inbound.Start(adapter.StartStateStart)
+	err = adapter.StartNamed(adapter.StartStateStart, s.services)
 	if err != nil {
 		return err
 	}
-	for serviceName, service := range s.postServices {
-		err := service.Start()
-		if err != nil {
-			return E.Cause(err, "start ", serviceName)
-		}
-	}
-	err = s.outbound.Start(adapter.StartStatePostStart)
-	if err != nil {
-		return err
-	}
-	err = s.network.Start(adapter.StartStatePostStart)
-	if err != nil {
-		return err
-	}
-	err = s.router.Start(adapter.StartStatePostStart)
-	if err != nil {
-		return err
-	}
-	err = s.inbound.Start(adapter.StartStatePostStart)
+	err = s.inbound.Start(adapter.StartStateStart)
 	if err != nil {
 		return err
 	}
-	err = s.network.Start(adapter.StartStateStarted)
+	err = adapter.Start(adapter.StartStatePostStart, s.outbound, s.network, s.router, s.inbound)
 	if err != nil {
 		return err
 	}
-	err = s.router.Start(adapter.StartStateStarted)
+	err = adapter.StartNamed(adapter.StartStatePostStart, s.services)
 	if err != nil {
 		return err
 	}
-	err = s.outbound.Start(adapter.StartStateStarted)
+	err = adapter.Start(adapter.StartStateStarted, s.network, s.router, s.outbound, s.inbound)
 	if err != nil {
 		return err
 	}
-	err = s.inbound.Start(adapter.StartStateStarted)
+	err = adapter.StartNamed(adapter.StartStateStarted, s.services)
 	if err != nil {
 		return err
 	}
@@ -380,47 +349,18 @@ func (s *Box) Close() error {
 	default:
 		close(s.done)
 	}
-	monitor := taskmonitor.New(s.logger, C.StopTimeout)
-	var errors error
-	for serviceName, service := range s.postServices {
-		monitor.Start("close ", serviceName)
-		errors = E.Append(errors, service.Close(), func(err error) error {
-			return E.Cause(err, "close ", serviceName)
-		})
-		monitor.Finish()
-	}
-	errors = E.Errors(errors, s.inbound.Close())
-	errors = E.Errors(errors, s.outbound.Close())
-	errors = E.Errors(errors, s.network.Close())
-	errors = E.Errors(errors, s.router.Close())
-	for serviceName, service := range s.preServices1 {
-		monitor.Start("close ", serviceName)
-		errors = E.Append(errors, service.Close(), func(err error) error {
-			return E.Cause(err, "close ", serviceName)
-		})
-		monitor.Finish()
-	}
-	for serviceName, service := range s.preServices2 {
-		monitor.Start("close ", serviceName)
-		errors = E.Append(errors, service.Close(), func(err error) error {
-			return E.Cause(err, "close ", serviceName)
+	err := common.Close(
+		s.inbound, s.outbound, s.router, s.network,
+	)
+	for _, lifecycleService := range s.services {
+		err = E.Append(err, lifecycleService.Close(), func(err error) error {
+			return E.Cause(err, "close ", lifecycleService.Name())
 		})
-		monitor.Finish()
 	}
-	if err := common.Close(s.logFactory); err != nil {
-		errors = E.Append(errors, err, func(err error) error {
-			return E.Cause(err, "close logger")
-		})
-	}
-	return errors
-}
-
-func (s *Box) Inbound() adapter.InboundManager {
-	return s.inbound
-}
-
-func (s *Box) Outbound() adapter.OutboundManager {
-	return s.outbound
+	err = E.Append(err, s.logFactory.Close(), func(err error) error {
+		return E.Cause(err, "close logger")
+	})
+	return err
 }
 
 func (s *Box) Network() adapter.NetworkManager {
@@ -430,3 +370,11 @@ func (s *Box) Network() adapter.NetworkManager {
 func (s *Box) Router() adapter.Router {
 	return s.router
 }
+
+func (s *Box) Inbound() adapter.InboundManager {
+	return s.inbound
+}
+
+func (s *Box) Outbound() adapter.OutboundManager {
+	return s.outbound
+}

experimental/cachefile/cache.go

@@ -93,7 +93,18 @@ func New(ctx context.Context, options option.CacheFileOptions) *CacheFile {
 	}
 }
 
-func (c *CacheFile) start() error {
+func (c *CacheFile) Name() string {
+	return "cache-file"
+}
+
+func (c *CacheFile) Dependencies() []string {
+	return nil
+}
+
+func (c *CacheFile) Start(stage adapter.StartStage) error {
+	if stage != adapter.StartStateInitialize {
+		return nil
+	}
 	const fileMode = 0o666
 	options := bbolt.Options{Timeout: time.Second}
 	var (
@@ -151,14 +162,6 @@ func (c *CacheFile) start() error {
 	return nil
 }
 
-func (c *CacheFile) PreStart() error {
-	return c.start()
-}
-
-func (c *CacheFile) Start() error {
-	return nil
-}
-
 func (c *CacheFile) Close() error {
 	if c.DB == nil {
 		return nil

experimental/clashapi/server.go

@@ -133,45 +133,50 @@ func NewServer(ctx context.Context, logFactory log.ObservableFactory, options op
 	return s, nil
 }
 
-func (s *Server) PreStart() error {
-	cacheFile := service.FromContext[adapter.CacheFile](s.ctx)
-	if cacheFile != nil {
-		mode := cacheFile.LoadMode()
-		if common.Any(s.modeList, func(it string) bool {
-			return strings.EqualFold(it, mode)
-		}) {
-			s.mode = mode
-		}
-	}
-	return nil
+func (s *Server) Name() string {
+	return "clash server"
 }
 
-func (s *Server) Start() error {
-	if s.externalController {
-		s.checkAndDownloadExternalUI()
-		var (
-			listener net.Listener
-			err      error
-		)
-		for i := 0; i < 3; i++ {
-			listener, err = net.Listen("tcp", s.httpServer.Addr)
-			if runtime.GOOS == "android" && errors.Is(err, syscall.EADDRINUSE) {
-				time.Sleep(100 * time.Millisecond)
-				continue
+func (s *Server) Start(stage adapter.StartStage) error {
+	switch stage {
+	case adapter.StartStateStart:
+		cacheFile := service.FromContext[adapter.CacheFile](s.ctx)
+		if cacheFile != nil {
+			mode := cacheFile.LoadMode()
+			if common.Any(s.modeList, func(it string) bool {
+				return strings.EqualFold(it, mode)
+			}) {
+				s.mode = mode
 			}
-			break
-		}
-		if err != nil {
-			return E.Cause(err, "external controller listen error")
 		}
-		s.logger.Info("restful api listening at ", listener.Addr())
-		go func() {
-			err = s.httpServer.Serve(listener)
-			if err != nil && !errors.Is(err, http.ErrServerClosed) {
-				s.logger.Error("external controller serve error: ", err)
+	case adapter.StartStateStarted:
+		if s.externalController {
+			s.checkAndDownloadExternalUI()
+			var (
+				listener net.Listener
+				err      error
+			)
+			for i := 0; i < 3; i++ {
+				listener, err = net.Listen("tcp", s.httpServer.Addr)
+				if runtime.GOOS == "android" && errors.Is(err, syscall.EADDRINUSE) {
+					time.Sleep(100 * time.Millisecond)
+					continue
+				}
+				break
+			}
+			if err != nil {
+				return E.Cause(err, "external controller listen error")
 			}
-		}()
+			s.logger.Info("restful api listening at ", listener.Addr())
+			go func() {
+				err = s.httpServer.Serve(listener)
+				if err != nil && !errors.Is(err, http.ErrServerClosed) {
+					s.logger.Error("external controller serve error: ", err)
+				}
+			}()
+		}
 	}
+
 	return nil
 }
 
@@ -233,14 +238,12 @@ func (s *Server) TrafficManager() *trafficontrol.Manager {
 	return s.trafficManager
 }
 
-func (s *Server) RoutedConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, matchedRule adapter.Rule) (net.Conn, adapter.Tracker) {
-	tracker := trafficontrol.NewTCPTracker(conn, s.trafficManager, metadata, s.outboundManager, matchedRule)
-	return tracker, tracker
+func (s *Server) RoutedConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, matchedRule adapter.Rule, matchOutbound adapter.Outbound) net.Conn {
+	return trafficontrol.NewTCPTracker(conn, s.trafficManager, metadata, s.outboundManager, matchedRule, matchOutbound)
 }
 
-func (s *Server) RoutedPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext, matchedRule adapter.Rule) (N.PacketConn, adapter.Tracker) {
-	tracker := trafficontrol.NewUDPTracker(conn, s.trafficManager, metadata, s.outboundManager, matchedRule)
-	return tracker, tracker
+func (s *Server) RoutedPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext, matchedRule adapter.Rule, matchOutbound adapter.Outbound) N.PacketConn {
+	return trafficontrol.NewUDPTracker(conn, s.trafficManager, metadata, s.outboundManager, matchedRule, matchOutbound)
 }
 
 func authentication(serverSecret string) func(next http.Handler) http.Handler {

experimental/clashapi/trafficontrol/tracker.go

@@ -5,7 +5,6 @@ import (
 	"time"
 
 	"github.com/sagernet/sing-box/adapter"
-	R "github.com/sagernet/sing-box/route/rule"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/atomic"
 	"github.com/sagernet/sing/common/bufio"
@@ -88,7 +87,6 @@ func (t TrackerMetadata) MarshalJSON() ([]byte, error) {
 }
 
 type Tracker interface {
-	adapter.Tracker
 	Metadata() TrackerMetadata
 	Close() error
 }
@@ -108,10 +106,6 @@ func (tt *TCPConn) Close() error {
 	return tt.ExtendedConn.Close()
 }
 
-func (tt *TCPConn) Leave() {
-	tt.manager.Leave(tt)
-}
-
 func (tt *TCPConn) Upstream() any {
 	return tt.ExtendedConn
 }
@@ -124,7 +118,7 @@ func (tt *TCPConn) WriterReplaceable() bool {
 	return true
 }
 
-func NewTCPTracker(conn net.Conn, manager *Manager, metadata adapter.InboundContext, outboundManager adapter.OutboundManager, rule adapter.Rule) *TCPConn {
+func NewTCPTracker(conn net.Conn, manager *Manager, metadata adapter.InboundContext, outboundManager adapter.OutboundManager, matchRule adapter.Rule, matchOutbound adapter.Outbound) *TCPConn {
 	id, _ := uuid.NewV4()
 	var (
 		chain        []string
@@ -132,12 +126,8 @@ func NewTCPTracker(conn net.Conn, manager *Manager, metadata adapter.InboundCont
 		outbound     string
 		outboundType string
 	)
-	var action adapter.RuleAction
-	if rule != nil {
-		action = rule.Action()
-	}
-	if routeAction, isRouteAction := action.(*R.RuleActionRoute); isRouteAction {
-		next = routeAction.Outbound
+	if matchOutbound != nil {
+		next = matchOutbound.Tag()
 	} else {
 		next = outboundManager.Default().Tag()
 	}
@@ -172,7 +162,7 @@ func NewTCPTracker(conn net.Conn, manager *Manager, metadata adapter.InboundCont
 			Upload:       upload,
 			Download:     download,
 			Chain:        common.Reverse(chain),
-			Rule:         rule,
+			Rule:         matchRule,
 			Outbound:     outbound,
 			OutboundType: outboundType,
 		},
@@ -197,10 +187,6 @@ func (ut *UDPConn) Close() error {
 	return ut.PacketConn.Close()
 }
 
-func (ut *UDPConn) Leave() {
-	ut.manager.Leave(ut)
-}
-
 func (ut *UDPConn) Upstream() any {
 	return ut.PacketConn
 }
@@ -213,7 +199,7 @@ func (ut *UDPConn) WriterReplaceable() bool {
 	return true
 }
 
-func NewUDPTracker(conn N.PacketConn, manager *Manager, metadata adapter.InboundContext, outboundManager adapter.OutboundManager, rule adapter.Rule) *UDPConn {
+func NewUDPTracker(conn N.PacketConn, manager *Manager, metadata adapter.InboundContext, outboundManager adapter.OutboundManager, matchRule adapter.Rule, matchOutbound adapter.Outbound) *UDPConn {
 	id, _ := uuid.NewV4()
 	var (
 		chain        []string
@@ -221,12 +207,8 @@ func NewUDPTracker(conn N.PacketConn, manager *Manager, metadata adapter.Inbound
 		outbound     string
 		outboundType string
 	)
-	var action adapter.RuleAction
-	if rule != nil {
-		action = rule.Action()
-	}
-	if routeAction, isRouteAction := action.(*R.RuleActionRoute); isRouteAction {
-		next = routeAction.Outbound
+	if matchOutbound != nil {
+		next = matchOutbound.Tag()
 	} else {
 		next = outboundManager.Default().Tag()
 	}
@@ -261,7 +243,7 @@ func NewUDPTracker(conn N.PacketConn, manager *Manager, metadata adapter.Inbound
 			Upload:       upload,
 			Download:     download,
 			Chain:        common.Reverse(chain),
-			Rule:         rule,
+			Rule:         matchRule,
 			Outbound:     outbound,
 			OutboundType: outboundType,
 		},

experimental/libbox/command_clash_mode.go

@@ -38,11 +38,7 @@ func (s *CommandServer) handleSetClashMode(conn net.Conn) error {
 	if service == nil {
 		return writeError(conn, E.New("service not ready"))
 	}
-	clashServer := service.instance.Router().ClashServer()
-	if clashServer == nil {
-		return writeError(conn, E.New("Clash API disabled"))
-	}
-	clashServer.(*clashapi.Server).SetMode(newMode)
+	service.clashServer.(*clashapi.Server).SetMode(newMode)
 	return writeError(conn, nil)
 }
 
@@ -69,18 +65,14 @@ func (s *CommandServer) handleModeConn(conn net.Conn) error {
 			return ctx.Err()
 		}
 	}
-	clashServer := s.service.instance.Router().ClashServer()
-	if clashServer == nil {
-		return binary.Write(conn, binary.BigEndian, uint16(0))
-	}
-	err := writeClashModeList(conn, clashServer)
+	err := writeClashModeList(conn, s.service.clashServer)
 	if err != nil {
 		return err
 	}
 	for {
 		select {
 		case <-s.modeUpdate:
-			err = varbin.Write(conn, binary.BigEndian, clashServer.Mode())
+			err = varbin.Write(conn, binary.BigEndian, s.service.clashServer.Mode())
 			if err != nil {
 				return err
 			}

experimental/libbox/command_close_connection.go

@@ -45,11 +45,7 @@ func (s *CommandServer) handleCloseConnection(conn net.Conn) error {
 	if service == nil {
 		return writeError(conn, E.New("service not ready"))
 	}
-	clashServer := service.instance.Router().ClashServer()
-	if clashServer == nil {
-		return writeError(conn, E.New("Clash API disabled"))
-	}
-	targetConn := clashServer.(*clashapi.Server).TrafficManager().Connection(uuid.FromStringOrNil(connId))
+	targetConn := service.clashServer.(*clashapi.Server).TrafficManager().Connection(uuid.FromStringOrNil(connId))
 	if targetConn == nil {
 		return writeError(conn, E.New("connection already closed"))
 	}

experimental/libbox/command_connections.go

@@ -49,11 +49,7 @@ func (s *CommandServer) handleConnectionsConn(conn net.Conn) error {
 	for {
 		service := s.service
 		if service != nil {
-			clashServer := service.instance.Router().ClashServer()
-			if clashServer == nil {
-				return E.New("Clash API disabled")
-			}
-			trafficManager = clashServer.(*clashapi.Server).TrafficManager()
+			trafficManager = service.clashServer.(*clashapi.Server).TrafficManager()
 			break
 		}
 		select {

experimental/libbox/command_server.go

@@ -60,7 +60,7 @@ func NewCommandServer(handler CommandServerHandler, maxLines int32) *CommandServ
 func (s *CommandServer) SetService(newService *BoxService) {
 	if newService != nil {
 		service.PtrFromContext[urltest.HistoryStorage](newService.ctx).SetHook(s.urlTestUpdate)
-		newService.instance.Router().ClashServer().(*clashapi.Server).SetModeUpdateHook(s.modeUpdate)
+		newService.clashServer.(*clashapi.Server).SetModeUpdateHook(s.modeUpdate)
 	}
 	s.service = newService
 	s.notifyURLTestUpdate()

experimental/libbox/command_status.go

@@ -31,12 +31,10 @@ func (s *CommandServer) readStatus() StatusMessage {
 	message.ConnectionsOut = int32(conntrack.Count())
 
 	if s.service != nil {
-		if clashServer := s.service.instance.Router().ClashServer(); clashServer != nil {
-			message.TrafficAvailable = true
-			trafficManager := clashServer.(*clashapi.Server).TrafficManager()
-			message.UplinkTotal, message.DownlinkTotal = trafficManager.Total()
-			message.ConnectionsIn = int32(trafficManager.ConnectionsLen())
-		}
+		message.TrafficAvailable = true
+		trafficManager := s.service.clashServer.(*clashapi.Server).TrafficManager()
+		message.UplinkTotal, message.DownlinkTotal = trafficManager.Total()
+		message.ConnectionsIn = int32(trafficManager.ConnectionsLen())
 	}
 
 	return message

experimental/libbox/service.go

@@ -34,17 +34,18 @@ import (
 type BoxService struct {
 	ctx                   context.Context
 	cancel                context.CancelFunc
+	urlTestHistoryStorage *urltest.HistoryStorage
 	instance              *box.Box
+	clashServer           adapter.ClashServer
 	pauseManager          pause.Manager
-	urlTestHistoryStorage *urltest.HistoryStorage
 
 	servicePauseFields
 }
 
 func NewService(configContent string, platformInterface PlatformInterface) (*BoxService, error) {
 	ctx := box.Context(context.Background(), include.InboundRegistry(), include.OutboundRegistry())
-	ctx = service.ContextWith[deprecated.Manager](ctx, new(deprecatedManager))
 	ctx = filemanager.WithDefault(ctx, sWorkingPath, sTempPath, sUserID, sGroupID)
+	service.MustRegister[deprecated.Manager](ctx, new(deprecatedManager))
 	options, err := parseConfig(ctx, configContent)
 	if err != nil {
 		return nil, err
@@ -54,7 +55,7 @@ func NewService(configContent string, platformInterface PlatformInterface) (*Box
 	urlTestHistoryStorage := urltest.NewHistoryStorage()
 	ctx = service.ContextWithPtr(ctx, urlTestHistoryStorage)
 	platformWrapper := &platformInterfaceWrapper{iif: platformInterface, useProcFS: platformInterface.UseProcFS()}
-	ctx = service.ContextWith[platform.Interface](ctx, platformWrapper)
+	service.MustRegister[platform.Interface](ctx, platformWrapper)
 	instance, err := box.New(box.Options{
 		Context:           ctx,
 		Options:           options,
@@ -71,6 +72,7 @@ func NewService(configContent string, platformInterface PlatformInterface) (*Box
 		instance:              instance,
 		urlTestHistoryStorage: urlTestHistoryStorage,
 		pauseManager:          service.FromContext[pause.Manager](ctx),
+		clashServer:           service.FromContext[adapter.ClashServer](ctx),
 	}, nil
 }
 

experimental/v2rayapi/server.go

@@ -44,7 +44,14 @@ func NewServer(logger log.Logger, options option.V2RayAPIOptions) (adapter.V2Ray
 	return server, nil
 }
 
-func (s *Server) Start() error {
+func (s *Server) Name() string {
+	return "v2ray server"
+}
+
+func (s *Server) Start(stage adapter.StartStage) error {
+	if stage != adapter.StartStatePostStart {
+		return nil
+	}
 	listener, err := net.Listen("tcp", s.listen)
 	if err != nil {
 		return err
@@ -70,6 +77,6 @@ func (s *Server) Close() error {
 	)
 }
 
-func (s *Server) StatsService() adapter.V2RayStatsService {
+func (s *Server) StatsService() adapter.ConnectionTracker {
 	return s.statsService
 }

experimental/v2rayapi/stats.go

@@ -22,7 +22,7 @@ func init() {
 }
 
 var (
-	_ adapter.V2RayStatsService = (*StatsService)(nil)
+	_ adapter.ConnectionTracker = (*StatsService)(nil)
 	_ StatsServiceServer        = (*StatsService)(nil)
 )
 
@@ -60,7 +60,10 @@ func NewStatsService(options option.V2RayStatsServiceOptions) *StatsService {
 	}
 }
 
-func (s *StatsService) RoutedConnection(inbound string, outbound string, user string, conn net.Conn) net.Conn {
+func (s *StatsService) RoutedConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, matchedRule adapter.Rule, matchOutbound adapter.Outbound) net.Conn {
+	inbound := metadata.Inbound
+	user := metadata.User
+	outbound := matchOutbound.Tag()
 	var readCounter []*atomic.Int64
 	var writeCounter []*atomic.Int64
 	countInbound := inbound != "" && s.inbounds[inbound]
@@ -86,7 +89,10 @@ func (s *StatsService) RoutedConnection(inbound string, outbound string, user st
 	return bufio.NewInt64CounterConn(conn, readCounter, writeCounter)
 }
 
-func (s *StatsService) RoutedPacketConnection(inbound string, outbound string, user string, conn N.PacketConn) N.PacketConn {
+func (s *StatsService) RoutedPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext, matchedRule adapter.Rule, matchOutbound adapter.Outbound) N.PacketConn {
+	inbound := metadata.Inbound
+	user := metadata.User
+	outbound := matchOutbound.Tag()
 	var readCounter []*atomic.Int64
 	var writeCounter []*atomic.Int64
 	countInbound := inbound != "" && s.inbounds[inbound]

protocol/group/urltest.go

@@ -76,18 +76,7 @@ func (s *URLTest) Start() error {
 		}
 		outbounds = append(outbounds, detour)
 	}
-	group, err := NewURLTestGroup(
-		s.ctx,
-		s.router,
-		s.outboundManager,
-		s.logger,
-		outbounds,
-		s.link,
-		s.interval,
-		s.tolerance,
-		s.idleTimeout,
-		s.interruptExternalConnections,
-	)
+	group, err := NewURLTestGroup(s.ctx, s.outboundManager, s.logger, outbounds, s.link, s.interval, s.tolerance, s.idleTimeout, s.interruptExternalConnections)
 	if err != nil {
 		return err
 	}
@@ -215,18 +204,7 @@ type URLTestGroup struct {
 	lastActive atomic.TypedValue[time.Time]
 }
 
-func NewURLTestGroup(
-	ctx context.Context,
-	router adapter.Router,
-	outboundManager adapter.OutboundManager,
-	logger log.Logger,
-	outbounds []adapter.Outbound,
-	link string,
-	interval time.Duration,
-	tolerance uint16,
-	idleTimeout time.Duration,
-	interruptExternalConnections bool,
-) (*URLTestGroup, error) {
+func NewURLTestGroup(ctx context.Context, outboundManager adapter.OutboundManager, logger log.Logger, outbounds []adapter.Outbound, link string, interval time.Duration, tolerance uint16, idleTimeout time.Duration, interruptExternalConnections bool) (*URLTestGroup, error) {
 	if interval == 0 {
 		interval = C.DefaultURLTestInterval
 	}
@@ -241,14 +219,13 @@ func NewURLTestGroup(
 	}
 	var history *urltest.HistoryStorage
 	if history = service.PtrFromContext[urltest.HistoryStorage](ctx); history != nil {
-	} else if clashServer := router.ClashServer(); clashServer != nil {
+	} else if clashServer := service.FromContext[adapter.ClashServer](ctx); clashServer != nil {
 		history = clashServer.HistoryStorage()
 	} else {
 		history = urltest.NewHistoryStorage()
 	}
 	return &URLTestGroup{
 		ctx:                          ctx,
-		router:                       router,
 		outboundManager:              outboundManager,
 		logger:                       logger,
 		outbounds:                    outbounds,

route/route.go

@@ -91,16 +91,12 @@ func (r *Router) routeConnection(ctx context.Context, conn net.Conn, metadata ad
 	if err != nil {
 		return err
 	}
-	var (
-		// selectedOutbound adapter.Outbound
-		selectedDialer      N.Dialer
-		selectedTag         string
-		selectedDescription string
-	)
+	var selectedOutbound adapter.Outbound
 	if selectedRule != nil {
 		switch action := selectedRule.Action().(type) {
 		case *rule.RuleActionRoute:
-			selectedOutbound, loaded := r.outboundManager.Outbound(action.Outbound)
+			var loaded bool
+			selectedOutbound, loaded = r.outboundManager.Outbound(action.Outbound)
 			if !loaded {
 				buf.ReleaseMulti(buffers)
 				return E.New("outbound not found: ", action.Outbound)
@@ -109,12 +105,6 @@ func (r *Router) routeConnection(ctx context.Context, conn net.Conn, metadata ad
 				buf.ReleaseMulti(buffers)
 				return E.New("TCP is not supported by outbound: ", selectedOutbound.Tag())
 			}
-			selectedDialer = selectedOutbound
-			selectedTag = selectedOutbound.Tag()
-			selectedDescription = F.ToString("outbound/", selectedOutbound.Type(), "[", selectedOutbound.Tag(), "]")
-		case *rule.RuleActionDirect:
-			selectedDialer = action.Dialer
-			selectedDescription = action.String()
 		case *rule.RuleActionReject:
 			buf.ReleaseMulti(buffers)
 			N.CloseOnHandshakeFailure(conn, onClose, action.Error(ctx))
@@ -133,25 +123,16 @@ func (r *Router) routeConnection(ctx context.Context, conn net.Conn, metadata ad
 			buf.ReleaseMulti(buffers)
 			return E.New("TCP is not supported by default outbound: ", defaultOutbound.Tag())
 		}
-		selectedDialer = defaultOutbound
-		selectedTag = defaultOutbound.Tag()
-		selectedDescription = F.ToString("outbound/", defaultOutbound.Type(), "[", defaultOutbound.Tag(), "]")
+		selectedOutbound = defaultOutbound
 	}
 
 	for _, buffer := range buffers {
 		conn = bufio.NewCachedConn(conn, buffer)
 	}
-	if r.clashServer != nil {
-		trackerConn, tracker := r.clashServer.RoutedConnection(ctx, conn, metadata, selectedRule)
-		defer tracker.Leave()
-		conn = trackerConn
+	if r.tracker != nil {
+		conn = r.tracker.RoutedConnection(ctx, conn, metadata, selectedRule, selectedOutbound)
 	}
-	if r.v2rayServer != nil {
-		if statsService := r.v2rayServer.StatsService(); statsService != nil {
-			conn = statsService.RoutedConnection(metadata.Inbound, selectedTag, metadata.User, conn)
-		}
-	}
-	legacyOutbound, isLegacy := selectedDialer.(adapter.ConnectionHandler)
+	legacyOutbound, isLegacy := selectedOutbound.(adapter.ConnectionHandler)
 	if isLegacy {
 		err = legacyOutbound.NewConnection(ctx, conn, metadata)
 		if err != nil {
@@ -159,7 +140,7 @@ func (r *Router) routeConnection(ctx context.Context, conn net.Conn, metadata ad
 			if onClose != nil {
 				onClose(err)
 			}
-			return E.Cause(err, selectedDescription)
+			return E.Cause(err, F.ToString("outbound/", selectedOutbound.Type(), "[", selectedOutbound.Tag(), "]"))
 		} else {
 			if onClose != nil {
 				onClose(nil)
@@ -168,13 +149,13 @@ func (r *Router) routeConnection(ctx context.Context, conn net.Conn, metadata ad
 		return nil
 	}
 	// TODO
-	err = outbound.NewConnection(ctx, selectedDialer, conn, metadata)
+	err = outbound.NewConnection(ctx, selectedOutbound, conn, metadata)
 	if err != nil {
 		conn.Close()
 		if onClose != nil {
 			onClose(err)
 		}
-		return E.Cause(err, selectedDescription)
+		return E.Cause(err, F.ToString("outbound/", selectedOutbound.Type(), "[", selectedOutbound.Tag(), "]"))
 	} else {
 		if onClose != nil {
 			onClose(nil)
@@ -246,16 +227,13 @@ func (r *Router) routePacketConnection(ctx context.Context, conn N.PacketConn, m
 	if err != nil {
 		return err
 	}
-	var (
-		selectedDialer      N.Dialer
-		selectedTag         string
-		selectedDescription string
-	)
+	var selectedOutbound adapter.Outbound
 	var selectReturn bool
 	if selectedRule != nil {
 		switch action := selectedRule.Action().(type) {
 		case *rule.RuleActionRoute:
-			selectedOutbound, loaded := r.outboundManager.Outbound(action.Outbound)
+			var loaded bool
+			selectedOutbound, loaded = r.outboundManager.Outbound(action.Outbound)
 			if !loaded {
 				N.ReleaseMultiPacketBuffer(packetBuffers)
 				return E.New("outbound not found: ", action.Outbound)
@@ -264,12 +242,6 @@ func (r *Router) routePacketConnection(ctx context.Context, conn N.PacketConn, m
 				N.ReleaseMultiPacketBuffer(packetBuffers)
 				return E.New("UDP is not supported by outbound: ", selectedOutbound.Tag())
 			}
-			selectedDialer = selectedOutbound
-			selectedTag = selectedOutbound.Tag()
-			selectedDescription = F.ToString("outbound/", selectedOutbound.Type(), "[", selectedOutbound.Tag(), "]")
-		case *rule.RuleActionDirect:
-			selectedDialer = action.Dialer
-			selectedDescription = action.String()
 		case *rule.RuleActionReject:
 			N.ReleaseMultiPacketBuffer(packetBuffers)
 			N.CloseOnHandshakeFailure(conn, onClose, action.Error(ctx))
@@ -285,41 +257,32 @@ func (r *Router) routePacketConnection(ctx context.Context, conn N.PacketConn, m
 			N.ReleaseMultiPacketBuffer(packetBuffers)
 			return E.New("UDP is not supported by outbound: ", defaultOutbound.Tag())
 		}
-		selectedDialer = defaultOutbound
-		selectedTag = defaultOutbound.Tag()
-		selectedDescription = F.ToString("outbound/", defaultOutbound.Type(), "[", defaultOutbound.Tag(), "]")
+		selectedOutbound = defaultOutbound
 	}
 	for _, buffer := range packetBuffers {
 		conn = bufio.NewCachedPacketConn(conn, buffer.Buffer, buffer.Destination)
 		N.PutPacketBuffer(buffer)
 	}
-	if r.clashServer != nil {
-		trackerConn, tracker := r.clashServer.RoutedPacketConnection(ctx, conn, metadata, selectedRule)
-		defer tracker.Leave()
-		conn = trackerConn
-	}
-	if r.v2rayServer != nil {
-		if statsService := r.v2rayServer.StatsService(); statsService != nil {
-			conn = statsService.RoutedPacketConnection(metadata.Inbound, selectedTag, metadata.User, conn)
-		}
+	if r.tracker != nil {
+		conn = r.tracker.RoutedPacketConnection(ctx, conn, metadata, selectedRule, selectedOutbound)
 	}
 	if metadata.FakeIP {
 		conn = bufio.NewNATPacketConn(bufio.NewNetPacketConn(conn), metadata.OriginDestination, metadata.Destination)
 	}
-	legacyOutbound, isLegacy := selectedDialer.(adapter.PacketConnectionHandler)
+	legacyOutbound, isLegacy := selectedOutbound.(adapter.PacketConnectionHandler)
 	if isLegacy {
 		err = legacyOutbound.NewPacketConnection(ctx, conn, metadata)
 		N.CloseOnHandshakeFailure(conn, onClose, err)
 		if err != nil {
-			return E.Cause(err, selectedDescription)
+			return E.Cause(err, F.ToString("outbound/", selectedOutbound.Type(), "[", selectedOutbound.Tag(), "]"))
 		}
 		return nil
 	}
 	// TODO
-	err = outbound.NewPacketConnection(ctx, selectedDialer, conn, metadata)
+	err = outbound.NewPacketConnection(ctx, selectedOutbound, conn, metadata)
 	N.CloseOnHandshakeFailure(conn, onClose, err)
 	if err != nil {
-		return E.Cause(err, selectedDescription)
+		return E.Cause(err, F.ToString("outbound/", selectedOutbound.Type(), "[", selectedOutbound.Tag(), "]"))
 	}
 	return nil
 }

route/router.go

@@ -27,7 +27,6 @@ import (
 	F "github.com/sagernet/sing/common/format"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
-	"github.com/sagernet/sing/common/ntp"
 	"github.com/sagernet/sing/common/task"
 	"github.com/sagernet/sing/service"
 	"github.com/sagernet/sing/service/pause"
@@ -63,16 +62,14 @@ type Router struct {
 	dnsReverseMapping       *DNSReverseMapping
 	fakeIPStore             adapter.FakeIPStore
 	processSearcher         process.Searcher
-	timeService             *ntp.Service
 	pauseManager            pause.Manager
-	clashServer             adapter.ClashServer
-	v2rayServer             adapter.V2RayServer
+	tracker                 adapter.ConnectionTracker
 	platformInterface       platform.Interface
 	needWIFIState           bool
 	started                 bool
 }
 
-func NewRouter(ctx context.Context, logFactory log.Factory, options option.RouteOptions, dnsOptions option.DNSOptions, ntpOptions option.NTPOptions) (*Router, error) {
+func NewRouter(ctx context.Context, logFactory log.Factory, options option.RouteOptions, dnsOptions option.DNSOptions) (*Router, error) {
 	router := &Router{
 		ctx:                   ctx,
 		logger:                logFactory.NewLogger("router"),
@@ -94,7 +91,7 @@ func NewRouter(ctx context.Context, logFactory log.Factory, options option.Route
 		platformInterface:     service.FromContext[platform.Interface](ctx),
 		needWIFIState:         hasRule(options.Rules, isWIFIRule) || hasDNSRule(dnsOptions.Rules, isWIFIDNSRule),
 	}
-	ctx = service.ContextWith[adapter.Router](ctx, router)
+	service.MustRegister[adapter.Router](ctx, router)
 	router.dnsClient = dns.NewClient(dns.ClientOptions{
 		DisableCache:     dnsOptions.DNSClientOptions.DisableCache,
 		DisableExpire:    dnsOptions.DNSClientOptions.DisableExpire,
@@ -290,23 +287,6 @@ func NewRouter(ctx context.Context, logFactory log.Factory, options option.Route
 		}
 		router.fakeIPStore = fakeip.NewStore(ctx, router.logger, inet4Range, inet6Range)
 	}
-
-	if ntpOptions.Enabled {
-		ntpDialer, err := dialer.New(ctx, ntpOptions.DialerOptions)
-		if err != nil {
-			return nil, E.Cause(err, "create NTP service")
-		}
-		timeService := ntp.NewService(ntp.Options{
-			Context:       ctx,
-			Dialer:        ntpDialer,
-			Logger:        logFactory.NewLogger("ntp"),
-			Server:        ntpOptions.ServerOptions.Build(),
-			Interval:      time.Duration(ntpOptions.Interval),
-			WriteToSystem: ntpOptions.WriteToSystem,
-		})
-		service.MustRegister[ntp.TimeService](ctx, timeService)
-		router.timeService = timeService
-	}
 	return router, nil
 }
 
@@ -380,14 +360,6 @@ func (r *Router) Start(stage adapter.StartStage) error {
 				return E.Cause(err, "initialize DNS server[", i, "]")
 			}
 		}
-		if r.timeService != nil {
-			monitor.Start("initialize time service")
-			err := r.timeService.Start()
-			monitor.Finish()
-			if err != nil {
-				return E.Cause(err, "initialize time service")
-			}
-		}
 	case adapter.StartStatePostStart:
 		var cacheContext *adapter.HTTPStartContext
 		if len(r.ruleSets) > 0 {
@@ -502,13 +474,6 @@ func (r *Router) Close() error {
 		})
 		monitor.Finish()
 	}
-	if r.timeService != nil {
-		monitor.Start("close time service")
-		err = E.Append(err, r.timeService.Close(), func(err error) error {
-			return E.Cause(err, "close time service")
-		})
-		monitor.Finish()
-	}
 	if r.fakeIPStore != nil {
 		monitor.Start("close fakeip store")
 		err = E.Append(err, r.fakeIPStore.Close(), func(err error) error {
@@ -536,29 +501,8 @@ func (r *Router) Rules() []adapter.Rule {
 	return r.rules
 }
 
-func (r *Router) ClashServer() adapter.ClashServer {
-	return r.clashServer
-}
-
-func (r *Router) SetClashServer(server adapter.ClashServer) {
-	r.clashServer = server
-}
-
-func (r *Router) V2RayServer() adapter.V2RayServer {
-	return r.v2rayServer
-}
-
-func (r *Router) SetV2RayServer(server adapter.V2RayServer) {
-	r.v2rayServer = server
-}
-
-func (r *Router) NewError(ctx context.Context, err error) {
-	common.Close(err)
-	if E.IsClosedOrCanceled(err) {
-		r.logger.DebugContext(ctx, "connection closed: ", err)
-		return
-	}
-	r.logger.ErrorContext(ctx, err)
+func (r *Router) SetTracker(tracker adapter.ConnectionTracker) {
+	r.tracker = tracker
 }
 
 func (r *Router) ResetNetwork() {

route/rule/rule_default.go

@@ -219,7 +219,7 @@ func NewDefaultRule(ctx context.Context, logger log.ContextLogger, options optio
 		rule.allItems = append(rule.allItems, item)
 	}
 	if options.ClashMode != "" {
-		item := NewClashModeItem(router, options.ClashMode)
+		item := NewClashModeItem(ctx, options.ClashMode)
 		rule.items = append(rule.items, item)
 		rule.allItems = append(rule.allItems, item)
 	}

route/rule/rule_dns.go

@@ -216,7 +216,7 @@ func NewDefaultDNSRule(ctx context.Context, logger log.ContextLogger, options op
 		rule.allItems = append(rule.allItems, item)
 	}
 	if options.ClashMode != "" {
-		item := NewClashModeItem(router, options.ClashMode)
+		item := NewClashModeItem(ctx, options.ClashMode)
 		rule.items = append(rule.items, item)
 		rule.allItems = append(rule.allItems, item)
 	}

route/rule/rule_item_clash_mode.go

@@ -1,31 +1,38 @@
 package rule
 
 import (
+	"context"
 	"strings"
 
 	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing/service"
 )
 
 var _ RuleItem = (*ClashModeItem)(nil)
 
 type ClashModeItem struct {
-	router adapter.Router
-	mode   string
+	ctx         context.Context
+	clashServer adapter.ClashServer
+	mode        string
 }
 
-func NewClashModeItem(router adapter.Router, mode string) *ClashModeItem {
+func NewClashModeItem(ctx context.Context, mode string) *ClashModeItem {
 	return &ClashModeItem{
-		router: router,
-		mode:   mode,
+		ctx:  ctx,
+		mode: mode,
 	}
 }
 
+func (r *ClashModeItem) Start() error {
+	r.clashServer = service.FromContext[adapter.ClashServer](r.ctx)
+	return nil
+}
+
 func (r *ClashModeItem) Match(metadata *adapter.InboundContext) bool {
-	clashServer := r.router.ClashServer()
-	if clashServer == nil {
+	if r.clashServer == nil {
 		return false
 	}
-	return strings.EqualFold(clashServer.Mode(), r.mode)
+	return strings.EqualFold(r.clashServer.Mode(), r.mode)
 }
 
 func (r *ClashModeItem) String() string {