platform: Implement set underlying networks for android

Author: nekohasekai

adapter/network.go

@@ -51,4 +51,5 @@ type NetworkInterface struct {
 	DNSServers  []string
 	Expensive   bool
 	Constrained bool
+	RawNetwork  any
 }

experimental/libbox/config.go

@@ -78,6 +78,10 @@ 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
 }

experimental/libbox/platform.go

@@ -17,6 +17,7 @@ type PlatformInterface interface {
 	StartDefaultInterfaceMonitor(listener InterfaceUpdateListener) error
 	CloseDefaultInterfaceMonitor(listener InterfaceUpdateListener) error
 	GetInterfaces() (NetworkInterfaceIterator, error)
+	SetUnderlyingNetworks(networks RawNetworkIterator) error
 	UnderNetworkExtension() bool
 	IncludeAllNetworks() bool
 	ReadWIFIState() *WIFIState
@@ -50,6 +51,8 @@ type NetworkInterface struct {
 	Type      int32
 	DNSServer StringIterator
 	Metered   bool
+
+	RawNetwork RawNetwork
 }
 
 type WIFIState struct {
@@ -66,6 +69,11 @@ type NetworkInterfaceIterator interface {
 	HasNext() bool
 }
 
+type RawNetworkIterator interface {
+	Next() RawNetwork
+	HasNext() bool
+}
+
 type Notification struct {
 	Identifier string
 	TypeName   string

experimental/libbox/platform/interface.go

@@ -15,6 +15,7 @@ type Interface interface {
 	OpenTun(options *tun.Options, platformOptions option.TunPlatformOptions) (tun.Tun, error)
 	CreateDefaultInterfaceMonitor(logger logger.Logger) tun.DefaultInterfaceMonitor
 	Interfaces() ([]adapter.NetworkInterface, error)
+	SetUnderlyingNetworks(networks []adapter.NetworkInterface) error
 	UnderNetworkExtension() bool
 	IncludeAllNetworks() bool
 	ClearDNSCache()

experimental/libbox/raw_network_android.go

@@ -0,0 +1,3 @@
+package libbox
+
+type RawNetwork interface{}

experimental/libbox/raw_network_stub.go

@@ -0,0 +1,7 @@
+//go:build !android
+
+package libbox
+
+type RawNetwork interface {
+	stub()
+}

experimental/libbox/service.go

@@ -206,11 +206,18 @@ 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()
 }

route/network.go

@@ -240,6 +240,9 @@ 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 &&
@@ -260,6 +263,15 @@ 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
 	}