[fix] auto-route for android

config/config.go

@@ -875,7 +875,7 @@ func parseAuthentication(rawRecords []string) []auth.AuthUser {
 func parseTun(rawTun RawTun, general *General) (*Tun, error) {
 	if rawTun.Enable && rawTun.AutoDetectInterface {
 		autoDetectInterfaceName, err := commons.GetAutoDetectInterface()
-		if err != nil || autoDetectInterfaceName == "" {
+		if err != nil {
 			log.Warnln("Can not find auto detect interface.[%s]", err)
 		} else {
 			log.Warnln("Auto detect interface: %s", autoDetectInterfaceName)

listener/listener.go

@@ -2,9 +2,11 @@ package proxy
 
 import (
 	"fmt"
+	"github.com/Dreamacro/clash/common/cmd"
 	"github.com/Dreamacro/clash/listener/inner"
 	"net"
 	"os"
+	"runtime"
 	"strconv"
 	"sync"
 
@@ -395,5 +397,8 @@ func genAddr(host string, port int, allowLan bool) string {
 func Cleanup() {
 	if tunStackListener != nil {
 		_ = tunStackListener.Close()
+		if runtime.GOOS == "android" {
+			_, _ = cmd.ExecCmd("ip rule del pref 5000")
+		}
 	}
 }

listener/tun/ipstack/commons/router.go

@@ -3,7 +3,6 @@ package commons
 import (
 	"fmt"
 	"net"
-	"sync"
 	"time"
 
 	"github.com/Dreamacro/clash/component/dialer"
@@ -12,7 +11,6 @@ import (
 
 var (
 	defaultRoutes                   = []string{"1.0.0.0/8", "2.0.0.0/7", "4.0.0.0/6", "8.0.0.0/5", "16.0.0.0/4", "32.0.0.0/3", "64.0.0.0/2", "128.0.0.0/1"}
-	mux                             sync.Mutex
 	defaultInterfaceMonitorDuration = 3 * time.Second
 )
 
@@ -25,7 +23,7 @@ func ipv4MaskString(bits int) string {
 	return fmt.Sprintf("%d.%d.%d.%d", m[0], m[1], m[2], m[3])
 }
 
-func DefaultInterfaceChangeMonitor(cb func(ifName string)) {
+func DefaultInterfaceChangeMonitor() {
 	t := time.NewTicker(defaultInterfaceMonitorDuration)
 	defer t.Stop()
 
@@ -44,9 +42,7 @@ func DefaultInterfaceChangeMonitor(cb func(ifName string)) {
 		}
 
 		dialer.DefaultInterface.Store(interfaceName)
-		if cb != nil {
-			cb(interfaceName)
-		}
+
 		log.Warnln("[TUN] default interface changed by monitor, %s => %s", old, interfaceName)
 	}
 }

listener/tun/ipstack/commons/router_darwin.go

@@ -54,7 +54,7 @@ func configInterfaceRouting(interfaceName string, addr netip.Prefix) error {
 		}
 	}
 
-	go DefaultInterfaceChangeMonitor(nil)
+	go DefaultInterfaceChangeMonitor()
 
 	return execRouterCmd("add", "-inet6", "2000::/3", interfaceName)
 }

listener/tun/ipstack/commons/router_linux.go

@@ -2,13 +2,17 @@ package commons
 
 import (
 	"fmt"
-	"net/netip"
-
 	"github.com/Dreamacro/clash/common/cmd"
 	"github.com/Dreamacro/clash/listener/tun/device"
+	"github.com/Dreamacro/clash/log"
+	"net/netip"
+	"runtime"
 )
 
 func GetAutoDetectInterface() (string, error) {
+	if runtime.GOOS == "android" {
+		return cmd.ExecCmd("sh -c ip route | awk 'NR==1{print $3}' | xargs echo -n")
+	}
 	return cmd.ExecCmd("bash -c ip route show | grep 'default via' | awk -F ' ' 'NR==1{print $5}' | xargs echo -n")
 }
 
@@ -35,14 +39,27 @@ func ConfigInterfaceAddress(dev device.Device, addr netip.Prefix, forceMTU int,
 }
 
 func configInterfaceRouting(interfaceName string, addr netip.Prefix) error {
-	linkIP := addr.Masked().Addr().Next()
-	for _, route := range defaultRoutes {
-		if err := execRouterCmd("add", route, interfaceName, linkIP.String()); err != nil {
-			return err
+	if runtime.GOOS == "android" {
+		tableId := 1981801
+		for _, route := range defaultRoutes {
+			if _, err := cmd.ExecCmd(fmt.Sprintf("ip route add %s dev %s scope link table %d", route, interfaceName, tableId)); err != nil {
+				return err
+			}
+		}
+		_, err := cmd.ExecCmd(fmt.Sprintf("ip rule add lookup %d suppress_prefixlength 0 pref 5000", tableId))
+		if err != nil {
+			log.Warnln("%s", err)
+		}
+	} else {
+		linkIP := addr.Masked().Addr().Next()
+		for _, route := range defaultRoutes {
+			if err := execRouterCmd("add", route, interfaceName, linkIP.String()); err != nil {
+				return err
+			}
 		}
 	}
 
-	go DefaultInterfaceChangeMonitor(nil)
+	go DefaultInterfaceChangeMonitor()
 
 	return nil
 }

listener/tun/ipstack/commons/router_windows.go

@@ -205,7 +205,7 @@ startOver:
 
 	wintunInterfaceName = dev.Name()
 
-	go DefaultInterfaceChangeMonitor(nil)
+	go DefaultInterfaceChangeMonitor()
 
 	return nil
 }