support set tun stack

core/src/main/cpp/main.c

@@ -111,18 +111,20 @@ Java_com_github_kr328_clash_core_bridge_Bridge_nativeNotifyInstalledAppChanged(J
 JNIEXPORT void JNICALL
 Java_com_github_kr328_clash_core_bridge_Bridge_nativeStartTun(JNIEnv *env, jobject thiz,
                                                               jint fd,
+                                                              jstring stack,
                                                               jstring gateway,
                                                               jstring portal,
                                                               jstring dns,
                                                               jobject cb) {
     TRACE_METHOD();
 
+    scoped_string _stack = get_string(stack);
     scoped_string _gateway = get_string(gateway);
     scoped_string _portal = get_string(portal);
     scoped_string _dns = get_string(dns);
     jobject _interface = new_global(cb);
 
-    startTun(fd, _gateway, _portal, _dns, _interface);
+    startTun(fd, _stack, _gateway, _portal, _dns, _interface);
 }
 
 JNIEXPORT void JNICALL

core/src/main/golang/native/tun.go

@@ -64,7 +64,7 @@ func (t *remoteTun) close() {
 }
 
 //export startTun
-func startTun(fd C.int, gateway, portal, dns C.c_string, callback unsafe.Pointer) C.int {
+func startTun(fd C.int, stack, gateway, portal, dns C.c_string, callback unsafe.Pointer) C.int {
 	rTunLock.Lock()
 	defer rTunLock.Unlock()
 
@@ -74,6 +74,7 @@ func startTun(fd C.int, gateway, portal, dns C.c_string, callback unsafe.Pointer
 	}
 
 	f := int(fd)
+	s := C.GoString(stack)
 	g := C.GoString(gateway)
 	p := C.GoString(portal)
 	d := C.GoString(dns)
@@ -82,7 +83,7 @@ func startTun(fd C.int, gateway, portal, dns C.c_string, callback unsafe.Pointer
 
 	app.ApplyTunContext(remote.markSocket, remote.querySocketUid)
 
-	closer, err := tun.Start(f, g, p, d)
+	closer, err := tun.Start(f, s, g, p, d)
 	if err != nil {
 		remote.close()
 

core/src/main/golang/native/tun/tun.go

@@ -14,8 +14,13 @@ import (
 	"github.com/metacubex/mihomo/tunnel"
 )
 
-func Start(fd int, gateway, portal, dns string) (io.Closer, error) {
+func Start(fd int, stack, gateway, portal, dns string) (io.Closer, error) {
-	log.Debugln("TUN: fd = %d, gateway = %s, portal = %s, dns = %s", fd, gateway, portal, dns)
+	log.Debugln("TUN: fd = %d, stack = %s, gateway = %s, portal = %s, dns = %s", fd, stack, gateway, portal, dns)
+
+	tunStack, ok := C.StackTypeMapping[strings.ToLower(stack)]
+	if !ok {
+		tunStack = C.TunSystem
+	}
 
 	var prefix4 []netip.Prefix
 	var prefix6 []netip.Prefix
@@ -49,7 +54,7 @@ func Start(fd int, gateway, portal, dns string) (io.Closer, error) {
 	options := LC.Tun{
 		Enable:         true,
 		Device:         sing_tun.InterfaceName,
-		Stack:          C.TunSystem,
+		Stack:          tunStack,
 		DNSHijack:      dnsHijack,
 		Inet4Address:   prefix4,
 		Inet6Address:   prefix6,

core/src/main/java/com/github/kr328/clash/core/Clash.kt

@@ -64,13 +64,14 @@ object Clash {
 
     fun startTun(
         fd: Int,
+        stack: String,
         gateway: String,
         portal: String,
         dns: String,
         markSocket: (Int) -> Boolean,
         querySocketUid: (protocol: Int, source: InetSocketAddress, target: InetSocketAddress) -> Int
     ) {
-        Bridge.nativeStartTun(fd, gateway, portal, dns, object : TunInterface {
+        Bridge.nativeStartTun(fd, stack, gateway, portal, dns, object : TunInterface {
             override fun markSocket(fd: Int) {
                 markSocket(fd)
             }

core/src/main/java/com/github/kr328/clash/core/bridge/Bridge.kt

@@ -19,7 +19,7 @@ object Bridge {
     external fun nativeNotifyDnsChanged(dnsList: String)
     external fun nativeNotifyTimeZoneChanged(name: String, offset: Int)
     external fun nativeNotifyInstalledAppChanged(uidList: String)
-    external fun nativeStartTun(fd: Int, gateway: String, portal: String, dns: String, cb: TunInterface)
+    external fun nativeStartTun(fd: Int, stack: String, gateway: String, portal: String, dns: String, cb: TunInterface)
     external fun nativeStopTun()
     external fun nativeStartHttp(listenAt: String): String?
     external fun nativeStopHttp()

design/src/main/java/com/github/kr328/clash/design/NetworkSettingsDesign.kt

@@ -93,6 +93,22 @@ class NetworkSettingsDesign(
                 )
             }
 
+            selectableList(
+                value = srvStore::tunStackMode,
+                values = arrayOf(
+                    "system",
+                    "gvisor",
+                    "mixed"
+                ),
+                valuesText = arrayOf(
+                    R.string.tun_stack_system,
+                    R.string.tun_stack_gvisor,
+                    R.string.tun_stack_mixed
+                ),
+                title = R.string.tun_stack_mode,
+                configure = vpnDependencies::add,
+            )
+
             selectableList(
                 value = srvStore::accessControlMode,
                 values = AccessControlMode.values(),

design/src/main/res/values/strings.xml

@@ -232,6 +232,11 @@
     <string name="always_dark">Always Dark</string>
     <string name="always_light">Always Light</string>
 
+    <string name="tun_stack_mode">Stack Mode</string>
+    <string name="tun_stack_system">System Stack</string>
+    <string name="tun_stack_gvisor">Gvisor Stack</string>
+    <string name="tun_stack_mixed">Mixed Stack</string>
+
     <string name="allow_all_apps">Allow all apps</string>
     <string name="allow_selected_apps">Allow selected apps</string>
     <string name="deny_selected_apps">Deny selected apps</string>

service/src/main/java/com/github/kr328/clash/service/TunService.kt

@@ -218,6 +218,7 @@ class TunService : VpnService(), CoroutineScope by CoroutineScope(Dispatchers.De
             TunModule.TunDevice(
                 fd = establish()?.detachFd()
                     ?: throw NullPointerException("Establish VPN rejected by system"),
+                stack = store.tunStackMode,
                 gateway = "$TUN_GATEWAY/$TUN_SUBNET_PREFIX" + if (store.allowIpv6) ",$TUN_GATEWAY6/$TUN_SUBNET_PREFIX6" else "",
                 portal = TUN_PORTAL + if (store.allowIpv6) ",$TUN_PORTAL6" else "",
                 dns = if (store.dnsHijacking) NET_ANY else (TUN_DNS + if (store.allowIpv6) ",$TUN_DNS6" else ""),

service/src/main/java/com/github/kr328/clash/service/clash/module/TunModule.kt

@@ -15,6 +15,7 @@ import java.security.SecureRandom
 class TunModule(private val vpn: VpnService) : Module<Unit>(vpn) {
     data class TunDevice(
         val fd: Int,
+        var stack: String,
         val gateway: String,
         val portal: String,
         val dns: String,
@@ -56,6 +57,7 @@ class TunModule(private val vpn: VpnService) : Module<Unit>(vpn) {
     fun attach(device: TunDevice) {
         Clash.startTun(
             fd = device.fd,
+            stack = device.stack,
             gateway = device.gateway,
             portal = device.portal,
             dns = device.dns,

service/src/main/java/com/github/kr328/clash/service/store/ServiceStore.kt

@@ -56,6 +56,11 @@ class ServiceStore(context: Context) {
         defaultValue = false
     )
 
+    var tunStackMode by store.string(
+        key = "tun_stack_mode",
+        defaultValue = "system"
+    )
+
     var dynamicNotification by store.boolean(
         key = "dynamic_notification",
         defaultValue = true