Refactor multi networks strategy

adapter/inbound.go

@@ -69,6 +69,8 @@ type InboundContext struct {
 	UDPDisableDomainUnmapping bool
 	UDPConnect                bool
 	NetworkStrategy           C.NetworkStrategy
+	NetworkType               []C.InterfaceType
+	FallbackNetworkType       []C.InterfaceType
 	FallbackDelay             time.Duration
 
 	DNSServer string

adapter/network.go

@@ -28,10 +28,12 @@ type NetworkManager interface {
 }
 
 type NetworkOptions struct {
-	DefaultNetworkStrategy C.NetworkStrategy
+	NetworkStrategy     C.NetworkStrategy
-	DefaultFallbackDelay   time.Duration
+	NetworkType         []C.InterfaceType
-	DefaultInterface       string
+	FallbackNetworkType []C.InterfaceType
-	DefaultMark            uint32
+	FallbackDelay       time.Duration
+	BindInterface       string
+	RoutingMark         uint32
 }
 
 type InterfaceUpdateListener interface {
@@ -45,7 +47,7 @@ type WIFIState struct {
 
 type NetworkInterface struct {
 	control.Interface
-	Type        string
+	Type        C.InterfaceType
 	DNSServers  []string
 	Expensive   bool
 	Constrained bool

adapter/outbound/default.go

@@ -26,7 +26,7 @@ func NewConnection(ctx context.Context, this N.Dialer, conn net.Conn, metadata a
 	var err error
 	if len(metadata.DestinationAddresses) > 0 {
 		if parallelDialer, isParallelDialer := this.(dialer.ParallelInterfaceDialer); isParallelDialer {
-			outConn, err = dialer.DialSerialNetwork(ctx, parallelDialer, N.NetworkTCP, metadata.Destination, metadata.DestinationAddresses, metadata.NetworkStrategy, metadata.FallbackDelay)
+			outConn, err = dialer.DialSerialNetwork(ctx, parallelDialer, N.NetworkTCP, metadata.Destination, metadata.DestinationAddresses, metadata.NetworkStrategy, metadata.NetworkType, metadata.FallbackNetworkType, metadata.FallbackDelay)
 		} else {
 			outConn, err = N.DialSerial(ctx, this, N.NetworkTCP, metadata.Destination, metadata.DestinationAddresses)
 		}
@@ -56,7 +56,7 @@ func NewPacketConnection(ctx context.Context, this N.Dialer, conn N.PacketConn,
 	if metadata.UDPConnect {
 		if len(metadata.DestinationAddresses) > 0 {
 			if parallelDialer, isParallelDialer := this.(dialer.ParallelInterfaceDialer); isParallelDialer {
-				outConn, err = dialer.DialSerialNetwork(ctx, parallelDialer, N.NetworkUDP, metadata.Destination, metadata.DestinationAddresses, metadata.NetworkStrategy, metadata.FallbackDelay)
+				outConn, err = dialer.DialSerialNetwork(ctx, parallelDialer, N.NetworkUDP, metadata.Destination, metadata.DestinationAddresses, metadata.NetworkStrategy, metadata.NetworkType, metadata.FallbackNetworkType, metadata.FallbackDelay)
 			} else {
 				outConn, err = N.DialSerial(ctx, this, N.NetworkUDP, metadata.Destination, metadata.DestinationAddresses)
 			}
@@ -74,7 +74,7 @@ func NewPacketConnection(ctx context.Context, this N.Dialer, conn N.PacketConn,
 	} else {
 		if len(metadata.DestinationAddresses) > 0 {
 			if parallelDialer, isParallelDialer := this.(dialer.ParallelInterfaceDialer); isParallelDialer {
-				outPacketConn, destinationAddress, err = dialer.ListenSerialNetworkPacket(ctx, parallelDialer, metadata.Destination, metadata.DestinationAddresses, metadata.NetworkStrategy, metadata.FallbackDelay)
+				outPacketConn, destinationAddress, err = dialer.ListenSerialNetworkPacket(ctx, parallelDialer, metadata.Destination, metadata.DestinationAddresses, metadata.NetworkStrategy, metadata.NetworkType, metadata.FallbackNetworkType, metadata.FallbackDelay)
 			} else {
 				outPacketConn, destinationAddress, err = N.ListenSerial(ctx, this, metadata.Destination, metadata.DestinationAddresses)
 			}

common/dialer/default.go

@@ -10,6 +10,7 @@ import (
 	"github.com/sagernet/sing-box/common/conntrack"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/atomic"
 	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"
@@ -33,6 +34,8 @@ type DefaultDialer struct {
 	isWireGuardListener  bool
 	networkManager       adapter.NetworkManager
 	networkStrategy      C.NetworkStrategy
+	networkType          []C.InterfaceType
+	fallbackNetworkType  []C.InterfaceType
 	networkFallbackDelay time.Duration
 	networkLastFallback  atomic.TypedValue[time.Time]
 }
@@ -43,6 +46,8 @@ func NewDefault(networkManager adapter.NetworkManager, options option.DialerOpti
 		listener             net.ListenConfig
 		interfaceFinder      control.InterfaceFinder
 		networkStrategy      C.NetworkStrategy
+		networkType          []C.InterfaceType
+		fallbackNetworkType  []C.InterfaceType
 		networkFallbackDelay time.Duration
 	)
 	if networkManager != nil {
@@ -56,8 +61,8 @@ func NewDefault(networkManager adapter.NetworkManager, options option.DialerOpti
 		listener.Control = control.Append(listener.Control, bindFunc)
 	}
 	if options.RoutingMark > 0 {
-		dialer.Control = control.Append(dialer.Control, control.RoutingMark(options.RoutingMark))
+		dialer.Control = control.Append(dialer.Control, control.RoutingMark(uint32(options.RoutingMark)))
-		listener.Control = control.Append(listener.Control, control.RoutingMark(options.RoutingMark))
+		listener.Control = control.Append(listener.Control, control.RoutingMark(uint32(options.RoutingMark)))
 	}
 	if networkManager != nil {
 		autoRedirectOutputMark := networkManager.AutoRedirectOutputMark()
@@ -74,6 +79,8 @@ func NewDefault(networkManager adapter.NetworkManager, options option.DialerOpti
 			return nil, E.New("`network_strategy` is conflict with `bind_interface`, `inet4_bind_address` and `inet6_bind_address`")
 		}
 		networkStrategy = C.NetworkStrategy(options.NetworkStrategy)
+		networkType = common.Map(options.NetworkType, option.InterfaceType.Build)
+		fallbackNetworkType = common.Map(options.FallbackNetworkType, option.InterfaceType.Build)
 		networkFallbackDelay = time.Duration(options.NetworkFallbackDelay)
 		if networkManager == nil || !networkManager.AutoDetectInterface() {
 			return nil, E.New("`route.auto_detect_interface` is require by `network_strategy`")
@@ -81,14 +88,16 @@ func NewDefault(networkManager adapter.NetworkManager, options option.DialerOpti
 	}
 	if networkManager != nil && options.BindInterface == "" && options.Inet4BindAddress == nil && options.Inet6BindAddress == nil {
 		defaultOptions := networkManager.DefaultOptions()
-		if defaultOptions.DefaultInterface != "" {
+		if defaultOptions.BindInterface != "" {
-			bindFunc := control.BindToInterface(networkManager.InterfaceFinder(), defaultOptions.DefaultInterface, -1)
+			bindFunc := control.BindToInterface(networkManager.InterfaceFinder(), defaultOptions.BindInterface, -1)
 			dialer.Control = control.Append(dialer.Control, bindFunc)
 			listener.Control = control.Append(listener.Control, bindFunc)
 		} else if networkManager.AutoDetectInterface() {
-			if defaultOptions.DefaultNetworkStrategy != C.NetworkStrategyDefault && C.NetworkStrategy(options.NetworkStrategy) == C.NetworkStrategyDefault {
+			if defaultOptions.NetworkStrategy != C.NetworkStrategyDefault && C.NetworkStrategy(options.NetworkStrategy) == C.NetworkStrategyDefault {
-				networkStrategy = defaultOptions.DefaultNetworkStrategy
+				networkStrategy = defaultOptions.NetworkStrategy
-				networkFallbackDelay = defaultOptions.DefaultFallbackDelay
+				networkType = defaultOptions.NetworkType
+				fallbackNetworkType = defaultOptions.FallbackNetworkType
+				networkFallbackDelay = defaultOptions.FallbackDelay
 				bindFunc := networkManager.ProtectFunc()
 				dialer.Control = control.Append(dialer.Control, bindFunc)
 				listener.Control = control.Append(listener.Control, bindFunc)
@@ -179,6 +188,8 @@ func NewDefault(networkManager adapter.NetworkManager, options option.DialerOpti
 		isWireGuardListener:  options.IsWireGuardListener,
 		networkManager:       networkManager,
 		networkStrategy:      networkStrategy,
+		networkType:          networkType,
+		fallbackNetworkType:  fallbackNetworkType,
 		networkFallbackDelay: networkFallbackDelay,
 	}, nil
 }
@@ -202,11 +213,11 @@ func (d *DefaultDialer) DialContext(ctx context.Context, network string, address
 			return trackConn(DialSlowContext(&d.dialer6, ctx, network, address))
 		}
 	} else {
-		return d.DialParallelInterface(ctx, network, address, d.networkStrategy, d.networkFallbackDelay)
+		return d.DialParallelInterface(ctx, network, address, d.networkStrategy, d.networkType, d.fallbackNetworkType, d.networkFallbackDelay)
 	}
 }
 
-func (d *DefaultDialer) DialParallelInterface(ctx context.Context, network string, address M.Socksaddr, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.Conn, error) {
+func (d *DefaultDialer) DialParallelInterface(ctx context.Context, network string, address M.Socksaddr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.Conn, error) {
 	if strategy == C.NetworkStrategyDefault {
 		return d.DialContext(ctx, network, address)
 	}
@@ -226,9 +237,9 @@ func (d *DefaultDialer) DialParallelInterface(ctx context.Context, network strin
 		err       error
 	)
 	if !fastFallback {
-		conn, isPrimary, err = d.dialParallelInterface(ctx, dialer, network, address.String(), strategy, fallbackDelay)
+		conn, isPrimary, err = d.dialParallelInterface(ctx, dialer, network, address.String(), strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
 	} else {
-		conn, isPrimary, err = d.dialParallelInterfaceFastFallback(ctx, dialer, network, address.String(), strategy, fallbackDelay, d.networkLastFallback.Store)
+		conn, isPrimary, err = d.dialParallelInterfaceFastFallback(ctx, dialer, network, address.String(), strategy, interfaceType, fallbackInterfaceType, fallbackDelay, d.networkLastFallback.Store)
 	}
 	if err != nil {
 		return nil, err
@@ -249,11 +260,11 @@ func (d *DefaultDialer) ListenPacket(ctx context.Context, destination M.Socksadd
 			return trackPacketConn(d.udpListener.ListenPacket(ctx, N.NetworkUDP, d.udpAddr4))
 		}
 	} else {
-		return d.ListenSerialInterfacePacket(ctx, destination, d.networkStrategy, d.networkFallbackDelay)
+		return d.ListenSerialInterfacePacket(ctx, destination, d.networkStrategy, d.networkType, d.fallbackNetworkType, d.networkFallbackDelay)
 	}
 }
 
-func (d *DefaultDialer) ListenSerialInterfacePacket(ctx context.Context, destination M.Socksaddr, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.PacketConn, error) {
+func (d *DefaultDialer) ListenSerialInterfacePacket(ctx context.Context, destination M.Socksaddr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.PacketConn, error) {
 	if strategy == C.NetworkStrategyDefault {
 		return d.ListenPacket(ctx, destination)
 	}
@@ -264,11 +275,11 @@ func (d *DefaultDialer) ListenSerialInterfacePacket(ctx context.Context, destina
 	if destination.IsIPv4() && !destination.Addr.IsUnspecified() {
 		network += "4"
 	}
-	return trackPacketConn(d.listenSerialInterfacePacket(ctx, d.udpListener, network, "", strategy, fallbackDelay))
+	return trackPacketConn(d.listenSerialInterfacePacket(ctx, d.udpListener, network, "", strategy, interfaceType, fallbackInterfaceType, fallbackDelay))
 }
 
 func (d *DefaultDialer) ListenPacketCompat(network, address string) (net.PacketConn, error) {
-	return trackPacketConn(d.listenSerialInterfacePacket(context.Background(), d.udpListener, network, address, d.networkStrategy, d.networkFallbackDelay))
+	return trackPacketConn(d.listenSerialInterfacePacket(context.Background(), d.udpListener, network, address, d.networkStrategy, d.networkType, d.fallbackNetworkType, d.networkFallbackDelay))
 }
 
 func trackConn(conn net.Conn, err error) (net.Conn, error) {

common/dialer/default_parallel_interface.go

@@ -7,14 +7,14 @@ import (
 
 	"github.com/sagernet/sing-box/adapter"
 	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"
-	F "github.com/sagernet/sing/common/format"
 	N "github.com/sagernet/sing/common/network"
 )
 
-func (d *DefaultDialer) dialParallelInterface(ctx context.Context, dialer net.Dialer, network string, addr string, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.Conn, bool, error) {
+func (d *DefaultDialer) dialParallelInterface(ctx context.Context, dialer net.Dialer, network string, addr string, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.Conn, bool, error) {
-	primaryInterfaces, fallbackInterfaces := selectInterfaces(d.networkManager, strategy)
+	primaryInterfaces, fallbackInterfaces := selectInterfaces(d.networkManager, strategy, interfaceType, fallbackInterfaceType)
 	if len(primaryInterfaces)+len(fallbackInterfaces) == 0 {
 		return nil, false, E.New("no available network interface")
 	}
@@ -84,8 +84,8 @@ func (d *DefaultDialer) dialParallelInterface(ctx context.Context, dialer net.Di
 	}
 }
 
-func (d *DefaultDialer) dialParallelInterfaceFastFallback(ctx context.Context, dialer net.Dialer, network string, addr string, strategy C.NetworkStrategy, fallbackDelay time.Duration, resetFastFallback func(time.Time)) (net.Conn, bool, error) {
+func (d *DefaultDialer) dialParallelInterfaceFastFallback(ctx context.Context, dialer net.Dialer, network string, addr string, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration, resetFastFallback func(time.Time)) (net.Conn, bool, error) {
-	primaryInterfaces, fallbackInterfaces := selectInterfaces(d.networkManager, strategy)
+	primaryInterfaces, fallbackInterfaces := selectInterfaces(d.networkManager, strategy, interfaceType, fallbackInterfaceType)
 	if len(primaryInterfaces)+len(fallbackInterfaces) == 0 {
 		return nil, false, E.New("no available network interface")
 	}
@@ -144,8 +144,8 @@ func (d *DefaultDialer) dialParallelInterfaceFastFallback(ctx context.Context, d
 	}
 }
 
-func (d *DefaultDialer) listenSerialInterfacePacket(ctx context.Context, listener net.ListenConfig, network string, addr string, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.PacketConn, error) {
+func (d *DefaultDialer) listenSerialInterfacePacket(ctx context.Context, listener net.ListenConfig, network string, addr string, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.PacketConn, error) {
-	primaryInterfaces, fallbackInterfaces := selectInterfaces(d.networkManager, strategy)
+	primaryInterfaces, fallbackInterfaces := selectInterfaces(d.networkManager, strategy, interfaceType, fallbackInterfaceType)
 	if len(primaryInterfaces)+len(fallbackInterfaces) == 0 {
 		return nil, E.New("no available network interface")
 	}
@@ -174,12 +174,12 @@ func (d *DefaultDialer) listenSerialInterfacePacket(ctx context.Context, listene
 	return nil, E.Errors(errors...)
 }
 
-func selectInterfaces(networkManager adapter.NetworkManager, strategy C.NetworkStrategy) (primaryInterfaces []adapter.NetworkInterface, fallbackInterfaces []adapter.NetworkInterface) {
+func selectInterfaces(networkManager adapter.NetworkManager, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType) (primaryInterfaces []adapter.NetworkInterface, fallbackInterfaces []adapter.NetworkInterface) {
 	interfaces := networkManager.NetworkInterfaces()
 	switch strategy {
-	case C.NetworkStrategyFallback:
+	case C.NetworkStrategyDefault:
+		if len(interfaceType) == 0 {
 			defaultIf := networkManager.InterfaceMonitor().DefaultInterface()
-		if defaultIf != nil {
 			for _, iif := range interfaces {
 				if iif.Index == defaultIf.Index {
 					primaryInterfaces = append(primaryInterfaces, iif)
@@ -188,54 +188,36 @@ func selectInterfaces(networkManager adapter.NetworkManager, strategy C.NetworkS
 				}
 			}
 		} else {
-			primaryInterfaces = interfaces
+			primaryInterfaces = common.Filter(interfaces, func(iif adapter.NetworkInterface) bool {
+				return common.Contains(interfaceType, iif.Type)
+			})
 		}
 	case C.NetworkStrategyHybrid:
+		if len(interfaceType) == 0 {
 			primaryInterfaces = interfaces
-	case C.NetworkStrategyWIFI:
+		} else {
+			primaryInterfaces = common.Filter(interfaces, func(iif adapter.NetworkInterface) bool {
+				return common.Contains(interfaceType, iif.Type)
+			})
+		}
+	case C.NetworkStrategyFallback:
+		if len(interfaceType) == 0 {
+			defaultIf := networkManager.InterfaceMonitor().DefaultInterface()
 			for _, iif := range interfaces {
-			if iif.Type == C.InterfaceTypeWIFI {
+				if iif.Index == defaultIf.Index {
 					primaryInterfaces = append(primaryInterfaces, iif)
 				} else {
 					fallbackInterfaces = append(fallbackInterfaces, iif)
 				}
 			}
-	case C.NetworkStrategyCellular:
-		for _, iif := range interfaces {
-			if iif.Type == C.InterfaceTypeCellular {
-				primaryInterfaces = append(primaryInterfaces, iif)
 		} else {
-				fallbackInterfaces = append(fallbackInterfaces, iif)
+			primaryInterfaces = common.Filter(interfaces, func(iif adapter.NetworkInterface) bool {
+				return common.Contains(interfaceType, iif.Type)
+			})
 		}
-		}
+		fallbackInterfaces = common.Filter(interfaces, func(iif adapter.NetworkInterface) bool {
-	case C.NetworkStrategyEthernet:
+			return common.Contains(fallbackInterfaceType, iif.Type)
-		for _, iif := range interfaces {
+		})
-			if iif.Type == C.InterfaceTypeEthernet {
-				primaryInterfaces = append(primaryInterfaces, iif)
-			} else {
-				fallbackInterfaces = append(fallbackInterfaces, iif)
-			}
-		}
-	case C.NetworkStrategyWIFIOnly:
-		for _, iif := range interfaces {
-			if iif.Type == C.InterfaceTypeWIFI {
-				primaryInterfaces = append(primaryInterfaces, iif)
-			}
-		}
-	case C.NetworkStrategyCellularOnly:
-		for _, iif := range interfaces {
-			if iif.Type == C.InterfaceTypeCellular {
-				primaryInterfaces = append(primaryInterfaces, iif)
-			}
-		}
-	case C.NetworkStrategyEthernetOnly:
-		for _, iif := range interfaces {
-			if iif.Type == C.InterfaceTypeEthernet {
-				primaryInterfaces = append(primaryInterfaces, iif)
-			}
-		}
-	default:
-		panic(F.ToString("unknown network strategy: ", strategy))
 	}
 	return primaryInterfaces, fallbackInterfaces
 }

common/dialer/default_parallel_network.go

@@ -13,13 +13,13 @@ import (
 	N "github.com/sagernet/sing/common/network"
 )
 
-func DialSerialNetwork(ctx context.Context, dialer ParallelInterfaceDialer, network string, destination M.Socksaddr, destinationAddresses []netip.Addr, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.Conn, error) {
+func DialSerialNetwork(ctx context.Context, dialer ParallelInterfaceDialer, network string, destination M.Socksaddr, destinationAddresses []netip.Addr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.Conn, error) {
 	if parallelDialer, isParallel := dialer.(ParallelNetworkDialer); isParallel {
-		return parallelDialer.DialParallelNetwork(ctx, network, destination, destinationAddresses, strategy, fallbackDelay)
+		return parallelDialer.DialParallelNetwork(ctx, network, destination, destinationAddresses, strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
 	}
 	var errors []error
 	for _, address := range destinationAddresses {
-		conn, err := dialer.DialParallelInterface(ctx, network, M.SocksaddrFrom(address, destination.Port), strategy, fallbackDelay)
+		conn, err := dialer.DialParallelInterface(ctx, network, M.SocksaddrFrom(address, destination.Port), strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
 		if err == nil {
 			return conn, nil
 		}
@@ -28,7 +28,7 @@ func DialSerialNetwork(ctx context.Context, dialer ParallelInterfaceDialer, netw
 	return nil, E.Errors(errors...)
 }
 
-func DialParallelNetwork(ctx context.Context, dialer ParallelInterfaceDialer, network string, destination M.Socksaddr, destinationAddresses []netip.Addr, preferIPv6 bool, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.Conn, error) {
+func DialParallelNetwork(ctx context.Context, dialer ParallelInterfaceDialer, network string, destination M.Socksaddr, destinationAddresses []netip.Addr, preferIPv6 bool, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.Conn, error) {
 	if fallbackDelay == 0 {
 		fallbackDelay = N.DefaultFallbackDelay
 	}
@@ -43,7 +43,7 @@ func DialParallelNetwork(ctx context.Context, dialer ParallelInterfaceDialer, ne
 		return address.Is6() && !address.Is4In6()
 	})
 	if len(addresses4) == 0 || len(addresses6) == 0 {
-		return DialSerialNetwork(ctx, dialer, network, destination, destinationAddresses, strategy, fallbackDelay)
+		return DialSerialNetwork(ctx, dialer, network, destination, destinationAddresses, strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
 	}
 	var primaries, fallbacks []netip.Addr
 	if preferIPv6 {
@@ -65,7 +65,7 @@ func DialParallelNetwork(ctx context.Context, dialer ParallelInterfaceDialer, ne
 		if !primary {
 			ras = fallbacks
 		}
-		c, err := DialSerialNetwork(ctx, dialer, network, destination, ras, strategy, fallbackDelay)
+		c, err := DialSerialNetwork(ctx, dialer, network, destination, ras, strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
 		select {
 		case results <- dialResult{Conn: c, error: err, primary: primary, done: true}:
 		case <-returned:
@@ -106,13 +106,13 @@ func DialParallelNetwork(ctx context.Context, dialer ParallelInterfaceDialer, ne
 	}
 }
 
-func ListenSerialNetworkPacket(ctx context.Context, dialer ParallelInterfaceDialer, destination M.Socksaddr, destinationAddresses []netip.Addr, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.PacketConn, netip.Addr, error) {
+func ListenSerialNetworkPacket(ctx context.Context, dialer ParallelInterfaceDialer, destination M.Socksaddr, destinationAddresses []netip.Addr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.PacketConn, netip.Addr, error) {
 	if parallelDialer, isParallel := dialer.(ParallelNetworkDialer); isParallel {
-		return parallelDialer.ListenSerialNetworkPacket(ctx, destination, destinationAddresses, strategy, fallbackDelay)
+		return parallelDialer.ListenSerialNetworkPacket(ctx, destination, destinationAddresses, strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
 	}
 	var errors []error
 	for _, address := range destinationAddresses {
-		conn, err := dialer.ListenSerialInterfacePacket(ctx, M.SocksaddrFrom(address, destination.Port), strategy, fallbackDelay)
+		conn, err := dialer.ListenSerialInterfacePacket(ctx, M.SocksaddrFrom(address, destination.Port), strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
 		if err == nil {
 			return conn, address, nil
 		}

common/dialer/dialer.go

@@ -77,11 +77,11 @@ func NewDirect(ctx context.Context, options option.DialerOptions) (ParallelInter
 
 type ParallelInterfaceDialer interface {
 	N.Dialer
-	DialParallelInterface(ctx context.Context, network string, destination M.Socksaddr, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.Conn, error)
+	DialParallelInterface(ctx context.Context, network string, destination M.Socksaddr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.Conn, error)
-	ListenSerialInterfacePacket(ctx context.Context, destination M.Socksaddr, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.PacketConn, error)
+	ListenSerialInterfacePacket(ctx context.Context, destination M.Socksaddr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.PacketConn, error)
 }
 
 type ParallelNetworkDialer interface {
-	DialParallelNetwork(ctx context.Context, network string, destination M.Socksaddr, destinationAddresses []netip.Addr, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.Conn, error)
+	DialParallelNetwork(ctx context.Context, network string, destination M.Socksaddr, destinationAddresses []netip.Addr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.Conn, error)
-	ListenSerialNetworkPacket(ctx context.Context, destination M.Socksaddr, destinationAddresses []netip.Addr, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.PacketConn, netip.Addr, error)
+	ListenSerialNetworkPacket(ctx context.Context, destination M.Socksaddr, destinationAddresses []netip.Addr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.PacketConn, netip.Addr, error)
 }

common/dialer/resolve.go

@@ -106,7 +106,7 @@ func (d *resolveDialer) ListenPacket(ctx context.Context, destination M.Socksadd
 	return bufio.NewNATPacketConn(bufio.NewPacketConn(conn), M.SocksaddrFrom(destinationAddress, destination.Port), destination), nil
 }
 
-func (d *resolveParallelNetworkDialer) DialParallelInterface(ctx context.Context, network string, destination M.Socksaddr, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.Conn, error) {
+func (d *resolveParallelNetworkDialer) DialParallelInterface(ctx context.Context, network string, destination M.Socksaddr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.Conn, error) {
 	if !destination.IsFqdn() {
 		return d.dialer.DialContext(ctx, network, destination)
 	}
@@ -128,13 +128,13 @@ func (d *resolveParallelNetworkDialer) DialParallelInterface(ctx context.Context
 		fallbackDelay = d.fallbackDelay
 	}
 	if d.parallel {
-		return DialParallelNetwork(ctx, d.dialer, network, destination, addresses, d.strategy == dns.DomainStrategyPreferIPv6, strategy, fallbackDelay)
+		return DialParallelNetwork(ctx, d.dialer, network, destination, addresses, d.strategy == dns.DomainStrategyPreferIPv6, strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
 	} else {
-		return DialSerialNetwork(ctx, d.dialer, network, destination, addresses, strategy, fallbackDelay)
+		return DialSerialNetwork(ctx, d.dialer, network, destination, addresses, strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
 	}
 }
 
-func (d *resolveParallelNetworkDialer) ListenSerialInterfacePacket(ctx context.Context, destination M.Socksaddr, strategy C.NetworkStrategy, fallbackDelay time.Duration) (net.PacketConn, error) {
+func (d *resolveParallelNetworkDialer) ListenSerialInterfacePacket(ctx context.Context, destination M.Socksaddr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.PacketConn, error) {
 	if !destination.IsFqdn() {
 		return d.dialer.ListenPacket(ctx, destination)
 	}
@@ -152,7 +152,7 @@ func (d *resolveParallelNetworkDialer) ListenSerialInterfacePacket(ctx context.C
 	if err != nil {
 		return nil, err
 	}
-	conn, destinationAddress, err := ListenSerialNetworkPacket(ctx, d.dialer, destination, addresses, strategy, fallbackDelay)
+	conn, destinationAddress, err := ListenSerialNetworkPacket(ctx, d.dialer, destination, addresses, strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
 	if err != nil {
 		return nil, err
 	}

common/srs/binary.go

@@ -226,7 +226,7 @@ func readDefaultRule(reader varbin.Reader, recover bool) (rule option.DefaultHea
 			}
 			rule.AdGuardDomainMatcher = matcher
 		case ruleItemNetworkType:
-			rule.NetworkType, err = readRuleItemString(reader)
+			rule.NetworkType, err = readRuleItemUint8[option.InterfaceType](reader)
 		case ruleItemNetworkIsExpensive:
 			rule.NetworkIsExpensive = true
 		case ruleItemNetworkIsConstrained:
@@ -349,7 +349,7 @@ func writeDefaultRule(writer varbin.Writer, rule option.DefaultHeadlessRule, gen
 		if generateVersion < C.RuleSetVersion3 {
 			return E.New("network_type rule item is only supported in version 3 or later")
 		}
-		err = writeRuleItemString(writer, ruleItemNetworkType, rule.NetworkType)
+		err = writeRuleItemUint8(writer, ruleItemNetworkType, rule.NetworkType)
 		if err != nil {
 			return err
 		}
@@ -414,6 +414,18 @@ func writeRuleItemString(writer varbin.Writer, itemType uint8, value []string) e
 	return varbin.Write(writer, binary.BigEndian, value)
 }
 
+func readRuleItemUint8[E ~uint8](reader varbin.Reader) ([]E, error) {
+	return varbin.ReadValue[[]E](reader, binary.BigEndian)
+}
+
+func writeRuleItemUint8[E ~uint8](writer varbin.Writer, itemType uint8, value []E) error {
+	err := writer.WriteByte(itemType)
+	if err != nil {
+		return err
+	}
+	return varbin.Write(writer, binary.BigEndian, value)
+}
+
 func readRuleItemUint16(reader varbin.Reader) ([]uint16, error) {
 	return varbin.ReadValue[[]uint16](reader, binary.BigEndian)
 }

constant/network.go

@@ -5,44 +5,52 @@ import (
 	F "github.com/sagernet/sing/common/format"
 )
 
+type InterfaceType uint8
+
 const (
-	InterfaceTypeWIFI     = "wifi"
+	InterfaceTypeWIFI InterfaceType = iota
-	InterfaceTypeCellular = "cellular"
+	InterfaceTypeCellular
-	InterfaceTypeEthernet = "ethernet"
+	InterfaceTypeEthernet
-	InterfaceTypeOther    = "other"
+	InterfaceTypeOther
 )
 
-type NetworkStrategy int
+var (
+	interfaceTypeToString = map[InterfaceType]string{
+		InterfaceTypeWIFI:     "wifi",
+		InterfaceTypeCellular: "cellular",
+		InterfaceTypeEthernet: "ethernet",
+		InterfaceTypeOther:    "other",
+	}
+	StringToInterfaceType = common.ReverseMap(interfaceTypeToString)
+)
+
+func (t InterfaceType) String() string {
+	name, loaded := interfaceTypeToString[t]
+	if !loaded {
+		return F.ToString(int(t))
+	}
+	return name
+}
+
+type NetworkStrategy uint8
 
 const (
 	NetworkStrategyDefault NetworkStrategy = iota
 	NetworkStrategyFallback
 	NetworkStrategyHybrid
-	NetworkStrategyWIFI
-	NetworkStrategyCellular
-	NetworkStrategyEthernet
-	NetworkStrategyWIFIOnly
-	NetworkStrategyCellularOnly
-	NetworkStrategyEthernetOnly
 )
 
 var (
-	NetworkStrategyToString = map[NetworkStrategy]string{
+	networkStrategyToString = map[NetworkStrategy]string{
 		NetworkStrategyDefault:  "default",
 		NetworkStrategyFallback: "fallback",
 		NetworkStrategyHybrid:   "hybrid",
-		NetworkStrategyWIFI:         "wifi",
-		NetworkStrategyCellular:     "cellular",
-		NetworkStrategyEthernet:     "ethernet",
-		NetworkStrategyWIFIOnly:     "wifi_only",
-		NetworkStrategyCellularOnly: "cellular_only",
-		NetworkStrategyEthernetOnly: "ethernet_only",
 	}
-	StringToNetworkStrategy = common.ReverseMap(NetworkStrategyToString)
+	StringToNetworkStrategy = common.ReverseMap(networkStrategyToString)
 )
 
 func (s NetworkStrategy) String() string {
-	name, loaded := NetworkStrategyToString[s]
+	name, loaded := networkStrategyToString[s]
 	if !loaded {
 		return F.ToString(int(s))
 	}

experimental/libbox/platform.go

@@ -34,10 +34,10 @@ type InterfaceUpdateListener interface {
 }
 
 const (
-	InterfaceTypeWIFI     = C.InterfaceTypeWIFI
+	InterfaceTypeWIFI     = int32(C.InterfaceTypeWIFI)
-	InterfaceTypeCellular = C.InterfaceTypeCellular
+	InterfaceTypeCellular = int32(C.InterfaceTypeCellular)
-	InterfaceTypeEthernet = C.InterfaceTypeEthernet
+	InterfaceTypeEthernet = int32(C.InterfaceTypeEthernet)
-	InterfaceTypeOther    = C.InterfaceTypeOther
+	InterfaceTypeOther    = int32(C.InterfaceTypeOther)
 )
 
 type NetworkInterface struct {
@@ -47,7 +47,7 @@ type NetworkInterface struct {
 	Addresses StringIterator
 	Flags     int32
 
-	Type      string
+	Type      int32
 	DNSServer StringIterator
 	Metered   bool
 }

experimental/libbox/service.go

@@ -189,7 +189,7 @@ func (w *platformInterfaceWrapper) Interfaces() ([]adapter.NetworkInterface, err
 				Addresses: common.Map(iteratorToArray[string](netInterface.Addresses), netip.MustParsePrefix),
 				Flags:     linkFlags(uint32(netInterface.Flags)),
 			},
-			Type:        netInterface.Type,
+			Type:        C.InterfaceType(netInterface.Type),
 			DNSServers:  iteratorToArray[string](netInterface.DNSServer),
 			Expensive:   netInterface.Metered || isDefault && w.isExpensive,
 			Constrained: isDefault && w.isConstrained,

go.mod

@@ -25,7 +25,7 @@ require (
 	github.com/sagernet/gvisor v0.0.0-20241021032506-a4324256e4a3
 	github.com/sagernet/quic-go v0.48.1-beta.1
 	github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691
-	github.com/sagernet/sing v0.6.0-alpha.8
+	github.com/sagernet/sing v0.6.0-alpha.9
 	github.com/sagernet/sing-dns v0.4.0-alpha.1
 	github.com/sagernet/sing-mux v0.3.0-alpha.1
 	github.com/sagernet/sing-quic v0.3.0-rc.2

go.sum

@@ -110,8 +110,8 @@ github.com/sagernet/quic-go v0.48.1-beta.1/go.mod h1:1WgdDIVD1Gybp40JTWketeSfKA/
 github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691 h1:5Th31OC6yj8byLGkEnIYp6grlXfo1QYUfiYFGjewIdc=
 github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691/go.mod h1:B8lp4WkQ1PwNnrVMM6KyuFR20pU8jYBD+A4EhJovEXU=
 github.com/sagernet/sing v0.2.18/go.mod h1:OL6k2F0vHmEzXz2KW19qQzu172FDgSbUSODylighuVo=
-github.com/sagernet/sing v0.6.0-alpha.8 h1:j0ghX5QAXH/ozUjsTidMyHclkLw/mpRzHlQagByRsJI=
+github.com/sagernet/sing v0.6.0-alpha.9 h1:tOeHdRECQwe9R/1edVHbckF/IBoJoGzqhHRnHsNAQb8=
-github.com/sagernet/sing v0.6.0-alpha.8/go.mod h1:ARkL0gM13/Iv5VCZmci/NuoOlePoIsW0m7BWfln/Hak=
+github.com/sagernet/sing v0.6.0-alpha.9/go.mod h1:ARkL0gM13/Iv5VCZmci/NuoOlePoIsW0m7BWfln/Hak=
 github.com/sagernet/sing-dns v0.4.0-alpha.1 h1:2KlP8DeqtGkULFiZtvG2r7SuoJP6orANFzJwC5vDKvg=
 github.com/sagernet/sing-dns v0.4.0-alpha.1/go.mod h1:vgHATsm4wdymwpvBZPei8RY+546iGXS6hlWv2x6YKcM=
 github.com/sagernet/sing-mux v0.3.0-alpha.1 h1:IgNX5bJBpL41gGbp05pdDOvh/b5eUQ6cv9240+Ngipg=

option/outbound.go

@@ -70,7 +70,7 @@ type DialerOptions struct {
 	Inet4BindAddress     *badoption.Addr                   `json:"inet4_bind_address,omitempty"`
 	Inet6BindAddress     *badoption.Addr                   `json:"inet6_bind_address,omitempty"`
 	ProtectPath          string                            `json:"protect_path,omitempty"`
-	RoutingMark          uint32             `json:"routing_mark,omitempty"`
+	RoutingMark          FwMark                            `json:"routing_mark,omitempty"`
 	ReuseAddr            bool                              `json:"reuse_addr,omitempty"`
 	ConnectTimeout       badoption.Duration                `json:"connect_timeout,omitempty"`
 	TCPFastOpen          bool                              `json:"tcp_fast_open,omitempty"`
@@ -79,6 +79,8 @@ type DialerOptions struct {
 	UDPFragmentDefault   bool                              `json:"-"`
 	DomainStrategy       DomainStrategy                    `json:"domain_strategy,omitempty"`
 	NetworkStrategy      NetworkStrategy                   `json:"network_strategy,omitempty"`
+	NetworkType          badoption.Listable[InterfaceType] `json:"network_type,omitempty"`
+	FallbackNetworkType  badoption.Listable[InterfaceType] `json:"fallback_network_type,omitempty"`
 	FallbackDelay        badoption.Duration                `json:"fallback_delay,omitempty"`
 	NetworkFallbackDelay badoption.Duration                `json:"network_fallback_delay,omitempty"`
 	IsWireGuardListener  bool                              `json:"-"`

option/route.go

@@ -14,6 +14,8 @@ type RouteOptions struct {
 	DefaultInterface           string                            `json:"default_interface,omitempty"`
 	DefaultMark                uint32                            `json:"default_mark,omitempty"`
 	DefaultNetworkStrategy     NetworkStrategy                   `json:"default_network_strategy,omitempty"`
+	DefaultNetworkType         badoption.Listable[InterfaceType] `json:"default_network_type,omitempty"`
+	DefaultFallbackNetworkType badoption.Listable[InterfaceType] `json:"default_fallback_network_type,omitempty"`
 	DefaultFallbackDelay       badoption.Duration                `json:"default_fallback_delay,omitempty"`
 }
 

option/rule.go

@@ -95,7 +95,7 @@ type RawDefaultRule struct {
 	User                     badoption.Listable[string]        `json:"user,omitempty"`
 	UserID                   badoption.Listable[int32]         `json:"user_id,omitempty"`
 	ClashMode                string                            `json:"clash_mode,omitempty"`
-	NetworkType              badoption.Listable[string] `json:"network_type,omitempty"`
+	NetworkType              badoption.Listable[InterfaceType] `json:"network_type,omitempty"`
 	NetworkIsExpensive       bool                              `json:"network_is_expensive,omitempty"`
 	NetworkIsConstrained     bool                              `json:"network_is_constrained,omitempty"`
 	WIFISSID                 badoption.Listable[string]        `json:"wifi_ssid,omitempty"`

option/rule_dns.go

@@ -97,7 +97,7 @@ type RawDefaultDNSRule struct {
 	UserID                   badoption.Listable[int32]         `json:"user_id,omitempty"`
 	Outbound                 badoption.Listable[string]        `json:"outbound,omitempty"`
 	ClashMode                string                            `json:"clash_mode,omitempty"`
-	NetworkType              badoption.Listable[string]       `json:"network_type,omitempty"`
+	NetworkType              badoption.Listable[InterfaceType] `json:"network_type,omitempty"`
 	NetworkIsExpensive       bool                              `json:"network_is_expensive,omitempty"`
 	NetworkIsConstrained     bool                              `json:"network_is_constrained,omitempty"`
 	WIFISSID                 badoption.Listable[string]        `json:"wifi_ssid,omitempty"`

option/rule_set.go

@@ -162,7 +162,7 @@ type DefaultHeadlessRule struct {
 	ProcessPath          badoption.Listable[string]        `json:"process_path,omitempty"`
 	ProcessPathRegex     badoption.Listable[string]        `json:"process_path_regex,omitempty"`
 	PackageName          badoption.Listable[string]        `json:"package_name,omitempty"`
-	NetworkType          badoption.Listable[string]       `json:"network_type,omitempty"`
+	NetworkType          badoption.Listable[InterfaceType] `json:"network_type,omitempty"`
 	NetworkIsExpensive   bool                              `json:"network_is_expensive,omitempty"`
 	NetworkIsConstrained bool                              `json:"network_is_constrained,omitempty"`
 	WIFISSID             badoption.Listable[string]        `json:"wifi_ssid,omitempty"`

option/types.go

@@ -171,3 +171,27 @@ func (n *NetworkStrategy) UnmarshalJSON(content []byte) error {
 	*n = NetworkStrategy(strategy)
 	return nil
 }
+
+type InterfaceType C.InterfaceType
+
+func (t InterfaceType) Build() C.InterfaceType {
+	return C.InterfaceType(t)
+}
+
+func (t InterfaceType) MarshalJSON() ([]byte, error) {
+	return json.Marshal(C.InterfaceType(t).String())
+}
+
+func (t *InterfaceType) UnmarshalJSON(content []byte) error {
+	var value string
+	err := json.Unmarshal(content, &value)
+	if err != nil {
+		return err
+	}
+	interfaceType, loaded := C.StringToInterfaceType[value]
+	if !loaded {
+		return E.New("unknown interface type: ", value)
+	}
+	*t = InterfaceType(interfaceType)
+	return nil
+}

protocol/direct/outbound.go

@@ -12,7 +12,7 @@ import (
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
-	dns "github.com/sagernet/sing-dns"
+	"github.com/sagernet/sing-dns"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/bufio"
 	E "github.com/sagernet/sing/common/exceptions"
@@ -37,6 +37,8 @@ type Outbound struct {
 	domainStrategy       dns.DomainStrategy
 	fallbackDelay        time.Duration
 	networkStrategy      C.NetworkStrategy
+	networkType          []C.InterfaceType
+	fallbackNetworkType  []C.InterfaceType
 	networkFallbackDelay time.Duration
 	overrideOption       int
 	overrideDestination  M.Socksaddr
@@ -55,6 +57,8 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		domainStrategy:       dns.DomainStrategy(options.DomainStrategy),
 		fallbackDelay:        time.Duration(options.FallbackDelay),
 		networkStrategy:      C.NetworkStrategy(options.NetworkStrategy),
+		networkType:          common.Map(options.NetworkType, option.InterfaceType.Build),
+		fallbackNetworkType:  common.Map(options.FallbackNetworkType, option.InterfaceType.Build),
 		networkFallbackDelay: time.Duration(options.NetworkFallbackDelay),
 		dialer:               outboundDialer,
 		// loopBack:       newLoopBackDetector(router),
@@ -171,10 +175,10 @@ func (h *Outbound) DialParallel(ctx context.Context, network string, destination
 			return nil, E.New("no IPv6 address available for ", destination)
 		}
 	}
-	return dialer.DialParallelNetwork(ctx, h.dialer, network, destination, destinationAddresses, domainStrategy == dns.DomainStrategyPreferIPv6, h.networkStrategy, h.fallbackDelay)
+	return dialer.DialParallelNetwork(ctx, h.dialer, network, destination, destinationAddresses, domainStrategy == dns.DomainStrategyPreferIPv6, h.networkStrategy, h.networkType, h.fallbackNetworkType, h.fallbackDelay)
 }
 
-func (h *Outbound) DialParallelNetwork(ctx context.Context, network string, destination M.Socksaddr, destinationAddresses []netip.Addr, networkStrategy C.NetworkStrategy, fallbackDelay time.Duration) (net.Conn, error) {
+func (h *Outbound) DialParallelNetwork(ctx context.Context, network string, destination M.Socksaddr, destinationAddresses []netip.Addr, networkStrategy C.NetworkStrategy, networkType []C.InterfaceType, fallbackNetworkType []C.InterfaceType, fallbackDelay time.Duration) (net.Conn, error) {
 	ctx, metadata := adapter.ExtendContext(ctx)
 	metadata.Outbound = h.Tag()
 	metadata.Destination = destination
@@ -210,10 +214,10 @@ func (h *Outbound) DialParallelNetwork(ctx context.Context, network string, dest
 			return nil, E.New("no IPv6 address available for ", destination)
 		}
 	}
-	return dialer.DialParallelNetwork(ctx, h.dialer, network, destination, destinationAddresses, domainStrategy == dns.DomainStrategyPreferIPv6, networkStrategy, fallbackDelay)
+	return dialer.DialParallelNetwork(ctx, h.dialer, network, destination, destinationAddresses, domainStrategy == dns.DomainStrategyPreferIPv6, networkStrategy, networkType, fallbackNetworkType, fallbackDelay)
 }
 
-func (h *Outbound) ListenSerialNetworkPacket(ctx context.Context, destination M.Socksaddr, destinationAddresses []netip.Addr, networkStrategy C.NetworkStrategy, fallbackDelay time.Duration) (net.PacketConn, netip.Addr, error) {
+func (h *Outbound) ListenSerialNetworkPacket(ctx context.Context, destination M.Socksaddr, destinationAddresses []netip.Addr, networkStrategy C.NetworkStrategy, networkType []C.InterfaceType, fallbackNetworkType []C.InterfaceType, fallbackDelay time.Duration) (net.PacketConn, netip.Addr, error) {
 	ctx, metadata := adapter.ExtendContext(ctx)
 	metadata.Outbound = h.Tag()
 	metadata.Destination = destination
@@ -232,7 +236,7 @@ func (h *Outbound) ListenSerialNetworkPacket(ctx context.Context, destination M.
 	} else {
 		h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
 	}
-	conn, newDestination, err := dialer.ListenSerialNetworkPacket(ctx, h.dialer, destination, destinationAddresses, networkStrategy, fallbackDelay)
+	conn, newDestination, err := dialer.ListenSerialNetworkPacket(ctx, h.dialer, destination, destinationAddresses, networkStrategy, networkType, fallbackNetworkType, fallbackDelay)
 	if err != nil {
 		return nil, netip.Addr{}, err
 	}

route/network.go

@@ -59,10 +59,12 @@ func NewNetworkManager(ctx context.Context, logger logger.ContextLogger, routeOp
 		interfaceFinder:     control.NewDefaultInterfaceFinder(),
 		autoDetectInterface: routeOptions.AutoDetectInterface,
 		defaultOptions: adapter.NetworkOptions{
-			DefaultInterface:       routeOptions.DefaultInterface,
+			BindInterface:       routeOptions.DefaultInterface,
-			DefaultMark:            routeOptions.DefaultMark,
+			RoutingMark:         routeOptions.DefaultMark,
-			DefaultNetworkStrategy: C.NetworkStrategy(routeOptions.DefaultNetworkStrategy),
+			NetworkStrategy:     C.NetworkStrategy(routeOptions.DefaultNetworkStrategy),
-			DefaultFallbackDelay:   time.Duration(routeOptions.DefaultFallbackDelay),
+			NetworkType:         common.Map(routeOptions.DefaultNetworkType, option.InterfaceType.Build),
+			FallbackNetworkType: common.Map(routeOptions.DefaultFallbackNetworkType, option.InterfaceType.Build),
+			FallbackDelay:       time.Duration(routeOptions.DefaultFallbackDelay),
 		},
 		pauseManager:      service.FromContext[pause.Manager](ctx),
 		platformInterface: service.FromContext[platform.Interface](ctx),
@@ -385,7 +387,7 @@ func (r *NetworkManager) notifyInterfaceUpdate(defaultInterface *control.Interfa
 		networkInterface := common.Find(r.networkInterfaces.Load(), func(it adapter.NetworkInterface) bool {
 			return it.Interface.Index == defaultInterface.Index
 		})
-		if networkInterface.Type == "" {
+		if networkInterface.Name == "" {
 			// race
 			return
 		}

route/rule/rule_action.go

@@ -140,6 +140,8 @@ func (r *RuleActionRoute) String() string {
 
 type RuleActionRouteOptions struct {
 	NetworkStrategy           C.NetworkStrategy
+	NetworkType               []C.InterfaceType
+	FallbackNetworkType       []C.InterfaceType
 	FallbackDelay             time.Duration
 	UDPDisableDomainUnmapping bool
 	UDPConnect                bool

route/rule/rule_default.go

@@ -8,6 +8,7 @@ import (
 	"github.com/sagernet/sing-box/experimental/deprecated"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/sing/service"
 )
@@ -224,7 +225,7 @@ func NewDefaultRule(ctx context.Context, logger log.ContextLogger, options optio
 		rule.allItems = append(rule.allItems, item)
 	}
 	if len(options.NetworkType) > 0 {
-		item := NewNetworkTypeItem(networkManager, options.NetworkType)
+		item := NewNetworkTypeItem(networkManager, common.Map(options.NetworkType, option.InterfaceType.Build))
 		rule.items = append(rule.items, item)
 		rule.allItems = append(rule.allItems, item)
 	}

route/rule/rule_dns.go

@@ -221,7 +221,7 @@ func NewDefaultDNSRule(ctx context.Context, logger log.ContextLogger, options op
 		rule.allItems = append(rule.allItems, item)
 	}
 	if len(options.NetworkType) > 0 {
-		item := NewNetworkTypeItem(networkManager, options.NetworkType)
+		item := NewNetworkTypeItem(networkManager, common.Map(options.NetworkType, option.InterfaceType.Build))
 		rule.items = append(rule.items, item)
 		rule.allItems = append(rule.allItems, item)
 	}

route/rule/rule_headless.go

@@ -6,6 +6,7 @@ import (
 	"github.com/sagernet/sing-box/adapter"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/sing/service"
 )
@@ -142,7 +143,7 @@ func NewDefaultHeadlessRule(ctx context.Context, options option.DefaultHeadlessR
 	}
 	if networkManager != nil {
 		if len(options.NetworkType) > 0 {
-			item := NewNetworkTypeItem(networkManager, options.NetworkType)
+			item := NewNetworkTypeItem(networkManager, common.Map(options.NetworkType, option.InterfaceType.Build))
 			rule.items = append(rule.items, item)
 			rule.allItems = append(rule.allItems, item)
 		}

route/rule/rule_item_network_type.go

@@ -4,6 +4,7 @@ import (
 	"strings"
 
 	"github.com/sagernet/sing-box/adapter"
+	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing/common"
 	F "github.com/sagernet/sing/common/format"
 )
@@ -12,10 +13,10 @@ var _ RuleItem = (*NetworkTypeItem)(nil)
 
 type NetworkTypeItem struct {
 	networkManager adapter.NetworkManager
-	networkType    []string
+	networkType    []C.InterfaceType
 }
 
-func NewNetworkTypeItem(networkManager adapter.NetworkManager, networkType []string) *NetworkTypeItem {
+func NewNetworkTypeItem(networkManager adapter.NetworkManager, networkType []C.InterfaceType) *NetworkTypeItem {
 	return &NetworkTypeItem{
 		networkManager: networkManager,
 		networkType:    networkType,