chore: allow config table-index for tun

https://github.com/MetaCubeX/mihomo/issues/1128

listener/config/tun.go

@@ -49,4 +49,5 @@ type Tun struct {
 	EndpointIndependentNat   bool           `yaml:"endpoint-independent-nat" json:"endpoint-independent-nat,omitempty"`
 	UDPTimeout               int64          `yaml:"udp-timeout" json:"udp-timeout,omitempty"`
 	FileDescriptor           int            `yaml:"file-descriptor" json:"file-descriptor"`
+	TableIndex               int            `yaml:"table-index" json:"table-index"`
 }

listener/inbound/tun.go

@@ -40,6 +40,7 @@ type TunOption struct {
 	EndpointIndependentNat   bool     `inbound:"endpoint_independent_nat,omitempty"`
 	UDPTimeout               int64    `inbound:"udp_timeout,omitempty"`
 	FileDescriptor           int      `inbound:"file-descriptor,omitempty"`
+	TableIndex               int      `inbound:"table-index,omitempty"`
 }
 
 func (o TunOption) Equal(config C.InboundConfig) bool {
@@ -118,6 +119,7 @@ func NewTun(options *TunOption) (*Tun, error) {
 			EndpointIndependentNat:   options.EndpointIndependentNat,
 			UDPTimeout:               options.UDPTimeout,
 			FileDescriptor:           options.FileDescriptor,
+			TableIndex:               options.TableIndex,
 		},
 	}, nil
 }

listener/listener.go

@@ -823,7 +823,8 @@ func hasTunConfigChange(tunConf *LC.Tun) bool {
 		LastTunConf.StrictRoute != tunConf.StrictRoute ||
 		LastTunConf.EndpointIndependentNat != tunConf.EndpointIndependentNat ||
 		LastTunConf.UDPTimeout != tunConf.UDPTimeout ||
-		LastTunConf.FileDescriptor != tunConf.FileDescriptor {
+		LastTunConf.FileDescriptor != tunConf.FileDescriptor ||
+		LastTunConf.TableIndex != tunConf.TableIndex {
 		return true
 	}
 

listener/sing_tun/server.go

@@ -112,6 +112,10 @@ func New(options LC.Tun, tunnel C.Tunnel, additions ...inbound.Addition) (l *Lis
 	} else {
 		udpTimeout = int64(sing.UDPTimeout.Seconds())
 	}
+	tableIndex := options.TableIndex
+	if tableIndex == 0 {
+		tableIndex = 2022
+	}
 	includeUID := uidToRange(options.IncludeUID)
 	if len(options.IncludeUIDRange) > 0 {
 		var err error
@@ -225,7 +229,7 @@ func New(options LC.Tun, tunnel C.Tunnel, additions ...inbound.Addition) (l *Lis
 		ExcludePackage:           options.ExcludePackage,
 		FileDescriptor:           options.FileDescriptor,
 		InterfaceMonitor:         defaultInterfaceMonitor,
-		TableIndex:               2022,
+		TableIndex:               tableIndex,
 	}
 
 	err = l.buildAndroidRules(&tunOptions)