diff --git a/adapter/network.go b/adapter/network.go
index 22816f07..00ef54b8 100644
--- a/adapter/network.go
+++ b/adapter/network.go
@@ -51,5 +51,4 @@ type NetworkInterface struct {
 	DNSServers  []string
 	Expensive   bool
 	Constrained bool
-	RawNetwork  any
 }
diff --git a/constant/cgo_android_fix.go b/constant/cgo_android_fix.go
deleted file mode 100644
index cb4023c4..00000000
--- a/constant/cgo_android_fix.go
+++ /dev/null
@@ -1,8 +0,0 @@
-//go:build android && debug
-
-package constant
-
-// TODO: remove after fixed
-// https://github.com/golang/go/issues/68760
-
-const FixAndroidStack = true
diff --git a/constant/cgo_android_fix_stub.go b/constant/cgo_android_fix_stub.go
deleted file mode 100644
index 6145f9f5..00000000
--- a/constant/cgo_android_fix_stub.go
+++ /dev/null
@@ -1,5 +0,0 @@
-//go:build !(android && debug)
-
-package constant
-
-const FixAndroidStack = false
diff --git a/experimental/libbox/command_client.go b/experimental/libbox/command_client.go
index a9b1c131..fff2dbe2 100644
--- a/experimental/libbox/command_client.go
+++ b/experimental/libbox/command_client.go
@@ -7,7 +7,6 @@ import (
 	"path/filepath"
 	"time"
 
-	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
 )
@@ -114,7 +113,7 @@ func (c *CommandClient) Connect() error {
 		if err != nil {
 			return err
 		}
-		if C.FixAndroidStack {
+		if sFixAndroidStack {
 			go func() {
 				c.handler.Connected()
 				c.handler.InitializeClashMode(newIterator(modeList), currentMode)
diff --git a/experimental/libbox/config.go b/experimental/libbox/config.go
index 7d0627fe..6a85c963 100644
--- a/experimental/libbox/config.go
+++ b/experimental/libbox/config.go
@@ -82,10 +82,6 @@ func (s *platformInterfaceStub) Interfaces() ([]adapter.NetworkInterface, error)
 	return nil, os.ErrInvalid
 }
 
-func (s *platformInterfaceStub) SetUnderlyingNetworks(networks []adapter.NetworkInterface) error {
-	return os.ErrInvalid
-}
-
 func (s *platformInterfaceStub) UnderNetworkExtension() bool {
 	return false
 }
diff --git a/experimental/libbox/monitor.go b/experimental/libbox/monitor.go
index f218d8b2..eac0026d 100644
--- a/experimental/libbox/monitor.go
+++ b/experimental/libbox/monitor.go
@@ -1,7 +1,6 @@
 package libbox
 
 import (
-	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-tun"
 	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"
@@ -56,7 +55,7 @@ func (m *platformDefaultInterfaceMonitor) UnregisterCallback(element *list.Eleme
 }
 
 func (m *platformDefaultInterfaceMonitor) UpdateDefaultInterface(interfaceName string, interfaceIndex32 int32, isExpensive bool, isConstrained bool) {
-	if C.FixAndroidStack {
+	if sFixAndroidStack {
 		go m.updateDefaultInterface(interfaceName, interfaceIndex32, isExpensive, isConstrained)
 	} else {
 		m.updateDefaultInterface(interfaceName, interfaceIndex32, isExpensive, isConstrained)
diff --git a/experimental/libbox/platform.go b/experimental/libbox/platform.go
index f4bc7ea6..2503ea44 100644
--- a/experimental/libbox/platform.go
+++ b/experimental/libbox/platform.go
@@ -18,7 +18,6 @@ type PlatformInterface interface {
 	StartDefaultInterfaceMonitor(listener InterfaceUpdateListener) error
 	CloseDefaultInterfaceMonitor(listener InterfaceUpdateListener) error
 	GetInterfaces() (NetworkInterfaceIterator, error)
-	SetUnderlyingNetworks(networks RawNetworkIterator) error
 	UnderNetworkExtension() bool
 	IncludeAllNetworks() bool
 	ReadWIFIState() *WIFIState
@@ -52,8 +51,6 @@ type NetworkInterface struct {
 	Type      int32
 	DNSServer StringIterator
 	Metered   bool
-
-	RawNetwork RawNetwork
 }
 
 type WIFIState struct {
@@ -70,11 +67,6 @@ type NetworkInterfaceIterator interface {
 	HasNext() bool
 }
 
-type RawNetworkIterator interface {
-	Next() RawNetwork
-	HasNext() bool
-}
-
 type Notification struct {
 	Identifier string
 	TypeName   string
diff --git a/experimental/libbox/platform/interface.go b/experimental/libbox/platform/interface.go
index 1684d88c..eda51b48 100644
--- a/experimental/libbox/platform/interface.go
+++ b/experimental/libbox/platform/interface.go
@@ -16,7 +16,6 @@ type Interface interface {
 	UpdateRouteOptions(options *tun.Options, platformOptions option.TunPlatformOptions) error
 	CreateDefaultInterfaceMonitor(logger logger.Logger) tun.DefaultInterfaceMonitor
 	Interfaces() ([]adapter.NetworkInterface, error)
-	SetUnderlyingNetworks(networks []adapter.NetworkInterface) error
 	UnderNetworkExtension() bool
 	IncludeAllNetworks() bool
 	ClearDNSCache()
diff --git a/experimental/libbox/raw_network_android.go b/experimental/libbox/raw_network_android.go
deleted file mode 100644
index b8d38aaa..00000000
--- a/experimental/libbox/raw_network_android.go
+++ /dev/null
@@ -1,3 +0,0 @@
-package libbox
-
-type RawNetwork interface{}
diff --git a/experimental/libbox/raw_network_stub.go b/experimental/libbox/raw_network_stub.go
deleted file mode 100644
index 6e23135c..00000000
--- a/experimental/libbox/raw_network_stub.go
+++ /dev/null
@@ -1,7 +0,0 @@
-//go:build !android
-
-package libbox
-
-type RawNetwork interface {
-	stub()
-}
diff --git a/experimental/libbox/service.go b/experimental/libbox/service.go
index e04c040d..4906c571 100644
--- a/experimental/libbox/service.go
+++ b/experimental/libbox/service.go
@@ -81,7 +81,7 @@ func NewService(configContent string, platformInterface PlatformInterface) (*Box
 }
 
 func (s *BoxService) Start() error {
-	if C.FixAndroidStack {
+	if sFixAndroidStack {
 		var err error
 		done := make(chan struct{})
 		go func() {
@@ -220,18 +220,11 @@ func (w *platformInterfaceWrapper) Interfaces() ([]adapter.NetworkInterface, err
 			DNSServers:  iteratorToArray[string](netInterface.DNSServer),
 			Expensive:   netInterface.Metered || isDefault && w.isExpensive,
 			Constrained: isDefault && w.isConstrained,
-			RawNetwork:  netInterface.RawNetwork,
 		})
 	}
 	return interfaces, nil
 }
 
-func (w *platformInterfaceWrapper) SetUnderlyingNetworks(networks []adapter.NetworkInterface) error {
-	return w.iif.SetUnderlyingNetworks(newIterator(common.Map(networks, func(it adapter.NetworkInterface) RawNetwork {
-		return it.RawNetwork.(RawNetwork)
-	})))
-}
-
 func (w *platformInterfaceWrapper) UnderNetworkExtension() bool {
 	return w.iif.UnderNetworkExtension()
 }
diff --git a/experimental/libbox/setup.go b/experimental/libbox/setup.go
index 3ea2f404..184d5250 100644
--- a/experimental/libbox/setup.go
+++ b/experimental/libbox/setup.go
@@ -14,43 +14,55 @@ import (
 )
 
 var (
-	sBasePath    string
-	sWorkingPath string
-	sTempPath    string
-	sUserID      int
-	sGroupID     int
-	sTVOS        bool
+	sBasePath        string
+	sWorkingPath     string
+	sTempPath        string
+	sUserID          int
+	sGroupID         int
+	sTVOS            bool
+	sFixAndroidStack bool
 )
 
 func init() {
 	debug.SetPanicOnFault(true)
 }
 
-func Setup(basePath string, workingPath string, tempPath string, isTVOS bool) {
-	sBasePath = basePath
-	sWorkingPath = workingPath
-	sTempPath = tempPath
-	sUserID = os.Getuid()
-	sGroupID = os.Getgid()
-	sTVOS = isTVOS
-	os.MkdirAll(sWorkingPath, 0o777)
-	os.MkdirAll(sTempPath, 0o777)
+type SetupOptions struct {
+	BasePath        string
+	WorkingPath     string
+	TempPath        string
+	Username        string
+	IsTVOS          bool
+	FixAndroidStack bool
 }
 
-func SetupWithUsername(basePath string, workingPath string, tempPath string, username string) error {
-	sBasePath = basePath
-	sWorkingPath = workingPath
-	sTempPath = tempPath
-	sUser, err := user.Lookup(username)
-	if err != nil {
-		return err
+func Setup(options *SetupOptions) error {
+	sBasePath = options.BasePath
+	sWorkingPath = options.WorkingPath
+	sTempPath = options.TempPath
+	if options.Username != "" {
+		sUser, err := user.Lookup(options.Username)
+		if err != nil {
+			return err
+		}
+		sUserID, _ = strconv.Atoi(sUser.Uid)
+		sGroupID, _ = strconv.Atoi(sUser.Gid)
+	} else {
+		sUserID = os.Getuid()
+		sGroupID = os.Getgid()
 	}
-	sUserID, _ = strconv.Atoi(sUser.Uid)
-	sGroupID, _ = strconv.Atoi(sUser.Gid)
+	sTVOS = options.IsTVOS
+
+	// TODO: remove after fixed
+	// https://github.com/golang/go/issues/68760
+	sFixAndroidStack = options.FixAndroidStack
+
 	os.MkdirAll(sWorkingPath, 0o777)
 	os.MkdirAll(sTempPath, 0o777)
-	os.Chown(sWorkingPath, sUserID, sGroupID)
-	os.Chown(sTempPath, sUserID, sGroupID)
+	if options.Username != "" {
+		os.Chown(sWorkingPath, sUserID, sGroupID)
+		os.Chown(sTempPath, sUserID, sGroupID)
+	}
 	return nil
 }
 
diff --git a/route/network.go b/route/network.go
index 875b6e93..d82701fe 100644
--- a/route/network.go
+++ b/route/network.go
@@ -240,9 +240,6 @@ func (r *NetworkManager) UpdateInterfaces() error {
 		newInterfaces := common.Filter(interfaces, func(it adapter.NetworkInterface) bool {
 			return it.Flags&net.FlagUp != 0
 		})
-		for _, networkInterface := range newInterfaces {
-			networkInterface.RawNetwork = nil
-		}
 		r.networkInterfaces.Store(newInterfaces)
 		if len(newInterfaces) > 0 && !slices.EqualFunc(oldInterfaces, newInterfaces, func(oldInterface adapter.NetworkInterface, newInterface adapter.NetworkInterface) bool {
 			return oldInterface.Interface.Index == newInterface.Interface.Index &&
@@ -263,15 +260,6 @@ func (r *NetworkManager) UpdateInterfaces() error {
 				}
 				return F.ToString(it.Name, " (", strings.Join(options, ", "), ")")
 			}), ", "))
-			if C.IsAndroid {
-				err = r.platformInterface.SetUnderlyingNetworks(newInterfaces)
-				if err != nil {
-					r.logger.Error("set underlying networks: ", err)
-				}
-			}
-		}
-		for _, networkInterface := range interfaces {
-			networkInterface.RawNetwork = nil
 		}
 		return nil
 	}