feat: Add IPv6 Route

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

@@ -56,6 +56,13 @@ class NetworkSettingsDesign(
 
             category(R.string.vpn_service_options)
 
+            switch(
+                value = srvStore::ipv6Route,
+                title = R.string.ipv6_route,
+                summary = R.string.ipv6_route_summary,
+                configure = vpnDependencies::add,
+            )
+
             switch(
                 value = srvStore::bypassPrivateNetwork,
                 title = R.string.bypass_private_network,

design/src/main/res/values-ja-rJP/strings.xml

@@ -92,6 +92,8 @@
     <string name="vpn_service_options">VPNサービスのオプション</string>
     <string name="bypass_private_network">プライベートネットワークをバイパスする</string>
     <string name="bypass_private_network_summary">プライベートネットワークアドレスをバイパスする</string>
+    <string name="ipv6_route">IPv6ルート</string>
+    <string name="ipv6_route_summary">IPv6ルーティングを有効にする</string>
     <string name="dns_hijacking">DNSハイジャック</string>
     <string name="dns_hijacking_summary">すべてのDNSパケットの処理</string>
     <string name="block_loopback">ループバックをブロックする</string>

design/src/main/res/values-ko-rKR/strings.xml

@@ -92,6 +92,8 @@
     <string name="vpn_service_options">VPN 서비스 옵션</string>
     <string name="bypass_private_network">사설 네트워크 제외</string>
     <string name="bypass_private_network_summary">사설 네트워크 주소를 제외합니다.</string>
+    <string name="ipv6_route">IPv6 경로</string>
+    <string name="ipv6_route_summary">IPv6 경로 활성화</string>
     <string name="dns_hijacking">DNS 하이재킹</string>
     <string name="dns_hijacking_summary">모든 DNS 패킷을 포함합니다.</string>
     <string name="block_loopback">로컬 루프백 차단</string>

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

@@ -116,6 +116,8 @@
     <string name="vpn_service_options">Настройки VPN</string>
     <string name="bypass_private_network">Игнорировать частные сети</string>
     <string name="bypass_private_network_summary">Игнорировать адреса частных сетей</string>
+    <string name="ipv6_route">IPv6-маршрутизация</string>
+    <string name="ipv6_route_summary">Включить маршрутизацию IPv6</string>
     <string name="dns_hijacking">Перехват DNS</string>
     <string name="dns_hijacking_summary">Обрабатывать все DNS запросы</string>
     <string name="block_loopback">Заблокировать loopback</string>

design/src/main/res/values-zh-rHK/strings.xml

@@ -11,6 +11,8 @@
     <string name="behavior">行為</string>
     <string name="bypass_private_network">繞過私有網絡</string>
     <string name="bypass_private_network_summary">繞過私有網絡地址</string>
+    <string name="ipv6_route">IPv6 路由</string>
+    <string name="ipv6_route_summary">啟用 IPv6 路由</string>
     <string name="cancel">取消</string>
     <string name="clash_logcat">Clash 日誌捕捉工具</string>
     <string name="create_profile">創建配置</string>

design/src/main/res/values-zh-rTW/strings.xml

@@ -11,6 +11,8 @@
     <string name="behavior">行為</string>
     <string name="bypass_private_network">略過私有網路</string>
     <string name="bypass_private_network_summary">略過私有網路位址</string>
+    <string name="ipv6_route">IPv6 路由</string>
+    <string name="ipv6_route_summary">啟用 IPv6 路由</string>
     <string name="cancel">取消</string>
     <string name="clash_logcat">Clash Logcat</string>
     <string name="create_profile">建立設定檔</string>

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

@@ -11,6 +11,8 @@
     <string name="behavior">行为</string>
     <string name="bypass_private_network">绕过私有网络</string>
     <string name="bypass_private_network_summary">绕过私有网络地址</string>
+    <string name="ipv6_route">IPv6 路由</string>
+    <string name="ipv6_route_summary">启用 IPv6 路由</string>
     <string name="cancel">取消</string>
     <string name="clash_logcat">Clash 日志捕捉工具</string>
     <string name="create_profile">创建配置</string>

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

@@ -116,6 +116,8 @@
     <string name="vpn_service_options">VpnService Options</string>
     <string name="bypass_private_network">Bypass Private Network</string>
     <string name="bypass_private_network_summary">Bypass private network addresses</string>
+    <string name="ipv6_route">IPv6 Route</string>
+    <string name="ipv6_route_summary">Enable IPv6 route</string>
     <string name="dns_hijacking">DNS Hijacking</string>
     <string name="dns_hijacking_summary">Handle all dns packet</string>
     <string name="block_loopback">Block Loopback</string>

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

@@ -131,7 +131,11 @@ class TunService : VpnService(), CoroutineScope by CoroutineScope(Dispatchers.De
 
         val device = with(Builder()) {
             // Interface address
-            addAddress(TUN_GATEWAY, TUN_SUBNET_PREFIX)
+            addAddress(TUN_VLAN4_CLIENT, TUN_VLAN4_SUBNET_PREFIX) // CLIENT
+
+            if (store.ipv6Route) {
+                addAddress(TUN_VLAN6_CLIENT, TUN_VLAN6_SUBNET_PREFIX)
+            }
 
             // Route
             if (store.bypassPrivateNetwork) {
@@ -140,9 +144,17 @@ class TunService : VpnService(), CoroutineScope by CoroutineScope(Dispatchers.De
                 }
 
                 // Route of virtual DNS
-                addRoute(TUN_DNS, 32)
+                addRoute(TUN_VLAN4_GATEWAY, 32)
+
+                if (store.ipv6Route) {
+                    addRoute("2000::", 3)
+                    addRoute(TUN_VLAN6_GATEWAY, 128)
+                }
             } else {
-                addRoute(NET_ANY, 0)
+                addRoute(TUN_VLAN4_ROUTE_DEFAULT, 0)
+                if (store.ipv6Route) {
+                    addRoute(TUN_VLAN6_ROUTE_DEFAULT, 0)
+                }
             }
 
             // Access Control
@@ -170,7 +182,11 @@ class TunService : VpnService(), CoroutineScope by CoroutineScope(Dispatchers.De
             setSession("Clash")
 
             // Virtual Dns Server
-            addDnsServer(TUN_DNS)
+            addDnsServer(TUN_VLAN4_DNS)
+
+            if (store.ipv6Route) {
+                addDnsServer(TUN_VLAN6_DNS)
+            }
 
             // Open MainActivity
             setConfigureIntent(
@@ -207,9 +223,11 @@ class TunService : VpnService(), CoroutineScope by CoroutineScope(Dispatchers.De
             TunModule.TunDevice(
                 fd = establish()?.detachFd()
                     ?: throw NullPointerException("Establish VPN rejected by system"),
-                gateway = "$TUN_GATEWAY/$TUN_SUBNET_PREFIX",
-                portal = TUN_PORTAL,
-                dns = if (store.dnsHijacking) NET_ANY else TUN_DNS,
+                gateway = "$TUN_VLAN4_CLIENT/$TUN_VLAN4_SUBNET_PREFIX",
+                portal = TUN_VLAN4_GATEWAY,
+                dns = if (store.dnsHijacking) TUN_VLAN4_ROUTE_DEFAULT else TUN_VLAN4_DNS,
+                gateway6 = if (store.ipv6Route) TUN_VLAN6_GATEWAY else null,
+                dns6 = if (store.dnsHijacking) TUN_VLAN6_ROUTE_DEFAULT else (if (store.ipv6Route) TUN_VLAN6_DNS else null),
             )
         }
 
@@ -218,11 +236,17 @@ class TunService : VpnService(), CoroutineScope by CoroutineScope(Dispatchers.De
 
     companion object {
         private const val TUN_MTU = 9000
-        private const val TUN_SUBNET_PREFIX = 30
-        private const val TUN_GATEWAY = "172.19.0.1"
-        private const val TUN_PORTAL = "172.19.0.2"
-        private const val TUN_DNS = TUN_PORTAL
-        private const val NET_ANY = "0.0.0.0"
+        private const val TUN_VLAN4_CLIENT = "172.19.0.1"
+        private const val TUN_VLAN4_GATEWAY = "172.19.0.2"
+        private const val TUN_VLAN4_DNS = TUN_VLAN4_GATEWAY
+        private const val TUN_VLAN4_SUBNET_PREFIX = 30
+        private const val TUN_VLAN4_ROUTE_DEFAULT = "0.0.0.0"
+
+        private const val TUN_VLAN6_CLIENT = "fdfe:dcba:9876::1"
+        private const val TUN_VLAN6_GATEWAY = "fdfe:dcba:9876::2"
+        private const val TUN_VLAN6_DNS = TUN_VLAN6_GATEWAY
+        private const val TUN_VLAN6_SUBNET_PREFIX = 126
+        private const val TUN_VLAN6_ROUTE_DEFAULT = "::"
 
         private val HTTP_PROXY_LOCAL_LIST: List<String> = listOf(
             "localhost",

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

@@ -18,6 +18,8 @@ class TunModule(private val vpn: VpnService) : Module<Unit>(vpn) {
         val gateway: String,
         val portal: String,
         val dns: String,
+        val gateway6: String?,
+        val dns6: String?
     )
 
     private val connectivity = service.getSystemService<ConnectivityManager>()!!

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

@@ -25,6 +25,11 @@ class ServiceStore(context: Context) {
         defaultValue = true
     )
 
+    var ipv6Route: Boolean by store.boolean(
+        key = "ipv6_route",
+        defaultValue = true
+    )
+
     var accessControlMode: AccessControlMode by store.enum(
         key = "access_control_mode",
         defaultValue = AccessControlMode.AcceptAll,