diff --git a/common/control/bind_finder.go b/common/control/bind_finder.go
index 47e6a8e..4d40b0d 100644
--- a/common/control/bind_finder.go
+++ b/common/control/bind_finder.go
@@ -5,6 +5,7 @@ import (
 )
 
 type InterfaceFinder interface {
+	Interfaces() []Interface
 	InterfaceIndexByName(name string) (int, error)
 	InterfaceNameByIndex(index int) (string, error)
 	InterfaceByAddr(addr netip.Addr) (*Interface, error)
diff --git a/common/control/bind_finder_default.go b/common/control/bind_finder_default.go
index d8c2eed..76dacbd 100644
--- a/common/control/bind_finder_default.go
+++ b/common/control/bind_finder_default.go
@@ -9,6 +9,8 @@ import (
 	M "github.com/sagernet/sing/common/metadata"
 )
 
+var _ InterfaceFinder = (*DefaultInterfaceFinder)(nil)
+
 type DefaultInterfaceFinder struct {
 	interfaces []Interface
 }
@@ -43,6 +45,10 @@ func (f *DefaultInterfaceFinder) UpdateInterfaces(interfaces []Interface) {
 	f.interfaces = interfaces
 }
 
+func (f *DefaultInterfaceFinder) Interfaces() []Interface {
+	return f.interfaces
+}
+
 func (f *DefaultInterfaceFinder) InterfaceIndexByName(name string) (int, error) {
 	for _, netInterface := range f.interfaces {
 		if netInterface.Name == name {