tun: dual MTU, gateway, DNS, auto routing

Change TunSettings to support separate IPv4/IPv6 MTU values and add gateway, DNS, autoSystemRoutingTable and autoOutboundsInterface properties. Introduces _normalizeMtu to accept legacy single-value or array forms and provide sensible defaults. Update fromJson/toJson to handle new fields and preserve backward compatibility. Update tun form UI to expose MTU IPv4/IPv6 inputs, Gateway/DNS tag selects, Auto Routing Table and Auto Outbounds input.

1 files changed, 37 insertions, 6 deletions

diff --git a/web/assets/js/model/inbound.js b/web/assets/js/model/inbound.js
index c4416e59..c94bd8d3 100644
--- a/web/assets/js/model/inbound.js
+++ b/web/assets/js/model/inbound.js
@@ -2723,29 +2723,60 @@ Inbound.TunSettings = class extends Inbound.Settings {
     constructor(
         protocol,
         name = 'xray0',
-        mtu = 1500,
-        userLevel = 0
+        mtu = [1500, 1280],
+        gateway = [],
+        dns = [],
+        userLevel = 0,
+        autoSystemRoutingTable = [],
+        autoOutboundsInterface = 'auto'
     ) {
         super(protocol);
         this.name = name;
-        this.mtu = mtu;
+        this.mtu = this._normalizeMtu(mtu);
+        this.gateway = Array.isArray(gateway) ? gateway : [];
+        this.dns = Array.isArray(dns) ? dns : [];
         this.userLevel = userLevel;
+        this.autoSystemRoutingTable = Array.isArray(autoSystemRoutingTable) ? autoSystemRoutingTable : [];
+        this.autoOutboundsInterface = autoOutboundsInterface;
+    }
+
+    _normalizeMtu(mtu) {
+        if (!Array.isArray(mtu)) {
+            const single = Number(mtu) || 1500;
+            return [single, single];
+        }
+        if (mtu.length === 0) {
+            return [1500, 1280];
+        }
+        if (mtu.length === 1) {
+            const single = Number(mtu[0]) || 1500;
+            return [single, single];
+        }
+        return [Number(mtu[0]) || 1500, Number(mtu[1]) || 1280];
     }
 
     static fromJson(json = {}) {
         return new Inbound.TunSettings(
             Protocols.TUN,
             json.name ?? 'xray0',
-            json.mtu ?? json.MTU ?? 1500,
-            json.userLevel ?? 0
+            json.mtu ?? json.MTU ?? [1500, 1280],
+            json.gateway ?? json.Gateway ?? [],
+            json.dns ?? json.DNS ?? [],
+            json.userLevel ?? 0,
+            json.autoSystemRoutingTable ?? [],
+            Object.prototype.hasOwnProperty.call(json, 'autoOutboundsInterface') ? json.autoOutboundsInterface : 'auto'
         );
     }
 
     toJson() {
         return {
             name: this.name || 'xray0',
-            mtu: this.mtu || 1500,
+            mtu: this._normalizeMtu(this.mtu),
+            gateway: this.gateway,
+            dns: this.dns,
             userLevel: this.userLevel || 0,
+            autoSystemRoutingTable: this.autoSystemRoutingTable,
+            autoOutboundsInterface: this.autoOutboundsInterface,
         };
     }
 };
\ No newline at end of file