customizable packet fragmentation settings (#9597)

* first changes * fix: use ItemsSource for fragment packets ComboBox so value saves correctly * feat: add customizable packet fragmentation for Xray-core - Add fragment settings in Core tab: Packets (dropdown), Length (range), Interval (range), MaxSplit (0-10000) - Support both 'from-to' (e.g., 50-100) and single value (e.g., 50) formats for Length, Interval, and MaxSplit - Validation with shortened error message: 'Invalid range format. Use from-to (e.g., 50-100).' - UI in PopupBox (materialDesign) visible only when EnableFragment is checked - Only Xray-core supported (Mihomo/sing-box fragment code removed) - Localization updated for 8 languages * fix: address 2dust review feedback - Move FragmentPacketsOptions to Global class - Remove default values from Fragment4RayItem model (set in ConfigHandler) - Fix Avalonia bindings: move ItemsSource and SelectedItem to code-behind - Update ViewModel to use Global.FragmentPacketsOptions - Remove defaults from model properties * Adjust ui --------- Co-authored-by: 2dust <31833384+2dust@users.noreply.github.com>
2026-07-26 09:52:05 +03:00 · 2026-06-22 11:30:13 +03:30
parent f1b88ccf2a
commit 81c118c9b2
21 changed files with 713 additions and 5 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -84,6 +84,9 @@ StyleCopReport.xml
 *.rsp
 # but not Directory.Build.rsp, as it configures directory-level build defaults
 !Directory.Build.rsp
+bin/
+obj/
+build/
 *.sbr
 *.tlb
 *.tli
--- a/v2rayN/ServiceLib/Common/Utils.cs
+++ b/v2rayN/ServiceLib/Common/Utils.cs
@@ -576,6 +576,58 @@ public class Utils
        }
    }

+    public static bool TryParseRange(string? input, int min, int max, out int from, out int to)
+    {
+        from = to = 0;
+        if (string.IsNullOrWhiteSpace(input))
+        {
+            return true;
+        }
+        var parts = input.Split('-');
+        if (parts.Length == 1)
+        {
+            if (!int.TryParse(parts[0], out from))
+            {
+                return false;
+            }
+            to = from;
+            return from >= min && to <= max;
+        }
+        if (parts.Length != 2
+            || !int.TryParse(parts[0], out from)
+            || !int.TryParse(parts[1], out to))
+        {
+            return false;
+        }
+        return from >= min && to <= max && from <= to;
+    }
+
+    public static bool TryParseMaxSplit(string? input, int min, int max, out int from, out int to)
+    {
+        from = to = 0;
+        if (string.IsNullOrWhiteSpace(input))
+        {
+            return true;
+        }
+        var parts = input.Split('-');
+        if (parts.Length == 1)
+        {
+            if (!int.TryParse(parts[0], out from))
+            {
+                return false;
+            }
+            to = from;
+            return from >= min && to <= max;
+        }
+        if (parts.Length != 2
+            || !int.TryParse(parts[0], out from)
+            || !int.TryParse(parts[1], out to))
+        {
+            return false;
+        }
+        return from >= min && to <= max && from <= to;
+    }
+
    public static bool IsPrivateNetwork(string ip)
    {
        if (IPAddress.TryParse(ip, out var address))
--- a/v2rayN/ServiceLib/Global.cs
+++ b/v2rayN/ServiceLib/Global.cs
@@ -406,6 +406,16 @@ public class Global
        ""
    ];

+    public static readonly List<string> FragmentPacketsOptions =
+    [
+        "tlshello",
+        "1-1",
+        "1-2",
+        "1-3",
+        "1-4",
+        "1-5"
+    ];
+
    public static readonly List<string> UserAgent =
    [
        "chrome",
--- a/v2rayN/ServiceLib/Handler/ConfigHandler.cs
+++ b/v2rayN/ServiceLib/Handler/ConfigHandler.cs
@@ -169,7 +169,8 @@ public static class ConfigHandler
        {
            Packets = "tlshello",
            Length = "50-100",
-            Interval = "10-20"
+            Interval = "10-20",
+            MaxSplit = "0"
        };
        config.GlobalHotkeys ??= [];

--- a/v2rayN/ServiceLib/Models/Configs/ConfigItems.cs
+++ b/v2rayN/ServiceLib/Models/Configs/ConfigItems.cs
@@ -249,6 +249,7 @@ public class Fragment4RayItem
    public string? Packets { get; set; }
    public string? Length { get; set; }
    public string? Interval { get; set; }
+    public string? MaxSplit { get; set; }
 }

 [Serializable]
--- a/v2rayN/ServiceLib/Models/CoreConfigs/V2rayConfig.cs
+++ b/v2rayN/ServiceLib/Models/CoreConfigs/V2rayConfig.cs
@@ -512,6 +512,7 @@ public class MaskSettings4Ray

    public string? length { get; set; }
    public string? delay { get; set; }
+    public int? maxSplit { get; set; }

    // noise
    public int? reset { get; set; }
--- a/v2rayN/ServiceLib/Resx/ResUI.Designer.cs
+++ b/v2rayN/ServiceLib/Resx/ResUI.Designer.cs
@@ -231,6 +231,15 @@ namespace ServiceLib.Resx {
            }
        }
        
+        /// <summary>
+        ///   查找类似 Fragment parameter format error. Please check Length (e.g. 50-100), Interval (1-100 range), and MaxSplit (0-10000). 的本地化字符串。
+        /// </summary>
+        public static string FillFragmentParameterError {
+            get {
+                return ResourceManager.GetString("FillFragmentParameterError", resourceCulture);
+            }
+        }
+        
        /// <summary>
        ///   查找类似 Please enter the local listening port. 的本地化字符串。
        /// </summary>
@@ -4086,6 +4095,114 @@ namespace ServiceLib.Resx {
            }
        }
        
+        /// <summary>
+        ///   查找类似 Fragment Length 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentLength {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentLength", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Fragment size range in bytes (e.g., 50-100). First value must be &lt;= second. Empty = default. 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentLengthTip {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentLengthTip", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Fragment Interval 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentInterval {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentInterval", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Delay between fragments in ms (e.g., 10-20). Range 1-100. First value must be &lt;= second. Empty = default. 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentIntervalTip {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentIntervalTip", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Max Split 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentMaxSplit {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentMaxSplit", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Maximum number of splits (0 = unlimited, 0-10000). Only effective for Xray-core. Empty = default. 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentMaxSplitTip {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentMaxSplitTip", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Fragment Packets 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentPackets {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentPackets", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Packets to fragment: tlshello (TLS ClientHello) or 1-1 to 1-5 (first N TCP packets) 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentPacketsTip {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentPacketsTip", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Sing-box Fragment Strategy 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentSingboxStrategy {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentSingboxStrategy", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 TLS Fragment: standard TLS record splitting. TCP Bypass: fragment TCP packets. Double: both modes combined. sing-box only. 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentSingboxStrategyTip {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentSingboxStrategyTip", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Fallback Delay 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentFallbackDelay {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentFallbackDelay", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Fallback delay for TLS fragment. Only effective for sing-box. Empty = default. 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsFragmentFallbackDelayTip {
+            get {
+                return ResourceManager.GetString("TbSettingsFragmentFallbackDelayTip", resourceCulture);
+            }
+        }
+        
        /// <summary>
        ///   查找类似 Enable hardware acceleration (requires restart) 的本地化字符串。
        /// </summary>
--- a/v2rayN/ServiceLib/Resx/ResUI.fa.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.fa.resx
@@ -1104,6 +1104,39 @@
  <data name="TbSettingsEnableFragment" xml:space="preserve">
    <value>فعال کردن فرگمنت</value>
  </data>
+  <data name="TbSettingsFragmentPackets" xml:space="preserve">
+    <value>پکت‌های فرگمنت</value>
+  </data>
+  <data name="TbSettingsFragmentPacketsTip" xml:space="preserve">
+    <value>پکت‌های قابل فرگمنت: tlshello (TLS ClientHello) یا 1-1 تا 1-5 (N اول پکت TCP)</value>
+  </data>
+  <data name="TbSettingsFragmentLength" xml:space="preserve">
+    <value>طول فرگمنت</value>
+  </data>
+  <data name="TbSettingsFragmentLengthTip" xml:space="preserve">
+    <value>محدوده اندازه فرگمنت بایت (مثلا 50-100). اول ≤ دوم. خالی = پیش‌فرض.</value>
+  </data>
+  <data name="TbSettingsFragmentInterval" xml:space="preserve">
+    <value>فاصله فرگمنت</value>
+  </data>
+  <data name="TbSettingsFragmentIntervalTip" xml:space="preserve">
+    <value>تأخیر بین فرگمنت‌ها میلی‌ثانیه (مثلا 10-20). بازه 1-100. اول ≤ دوم. خالی = پیش‌فرض.</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplit" xml:space="preserve">
+    <value>حداکثر تقسیم</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplitTip" xml:space="preserve">
+    <value>مکسیمم تعداد تقسیم (0 = نامحدود، 0-10000). فقط Xray-core. خالی = پیش‌فرض.</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelay" xml:space="preserve">
+    <value>تأخیر فول‌بک</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelayTip" xml:space="preserve">
+    <value>تأخیر فول‌بک فرگمنت TLS. فقط sing-box. خالی = پیش‌فرض.</value>
+  </data>
+  <data name="FillFragmentParameterError" xml:space="preserve">
+    <value>فرمت محدوده نامعتبر. از 'from-to' استفاده کنید (مثلا 50-100).</value>
+  </data>
  <data name="TbSettingsEnableCacheFile4Sbox" xml:space="preserve">
    <value>فعال کردن کش فایل مجموعه قوانین برای sing-box</value>
  </data>
--- a/v2rayN/ServiceLib/Resx/ResUI.fr.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.fr.resx
@@ -1101,6 +1101,39 @@
  <data name="TbSettingsEnableFragment" xml:space="preserve">
    <value>Activer le fragmentation (Fragment)</value>
  </data>
+  <data name="TbSettingsFragmentPackets" xml:space="preserve">
+    <value>Paquets fragmentés</value>
+  </data>
+  <data name="TbSettingsFragmentPacketsTip" xml:space="preserve">
+    <value>Paquets à fragmenter : tlshello (TLS ClientHello) ou 1-1 à 1-5 (premiers N paquets TCP)</value>
+  </data>
+  <data name="TbSettingsFragmentLength" xml:space="preserve">
+    <value>Longueur fragment</value>
+  </data>
+  <data name="TbSettingsFragmentLengthTip" xml:space="preserve">
+    <value>Plage de taille fragment (ex: 50-100). Première valeur ≤ seconde. Vide = défaut.</value>
+  </data>
+  <data name="TbSettingsFragmentInterval" xml:space="preserve">
+    <value>Intervalle fragment</value>
+  </data>
+  <data name="TbSettingsFragmentIntervalTip" xml:space="preserve">
+    <value>Délai entre fragments en ms (ex: 10-20). Plage 1-100. Première valeur ≤ seconde. Vide = défaut.</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplit" xml:space="preserve">
+    <value>Max Split</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplitTip" xml:space="preserve">
+    <value>Nb max de splits (0 = illimité, 0-10000). Xray-core seulement. Vide = défaut.</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelay" xml:space="preserve">
+    <value>Délai fallback</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelayTip" xml:space="preserve">
+    <value>Délai fallback pour fragment TLS. sing-box seulement. Vide = défaut.</value>
+  </data>
+  <data name="FillFragmentParameterError" xml:space="preserve">
+    <value>Format de plage invalide. Utilisez 'from-to' (ex: 50-100).</value>
+  </data>
  <data name="TbSettingsEnableCacheFile4Sbox" xml:space="preserve">
    <value>Activer le fichier de cache de sing-box (fichiers règles)</value>
  </data>
--- a/v2rayN/ServiceLib/Resx/ResUI.hu.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.hu.resx
@@ -1104,6 +1104,39 @@
  <data name="TbSettingsEnableFragment" xml:space="preserve">
    <value>Fragment engedélyezése</value>
  </data>
+  <data name="TbSettingsFragmentPackets" xml:space="preserve">
+    <value>Fragmentált csomagok</value>
+  </data>
+  <data name="TbSettingsFragmentPacketsTip" xml:space="preserve">
+    <value>Fragmentálandó csomagok: tlshello (TLS ClientHello) vagy 1-1 – 1-5 (az első N TCP csomag)</value>
+  </data>
+  <data name="TbSettingsFragmentLength" xml:space="preserve">
+    <value>Fragment hossz</value>
+  </data>
+  <data name="TbSettingsFragmentLengthTip" xml:space="preserve">
+    <value>Fragment méret tartománya bájtokban (pl. 50-100). Az első érték ≤ második. Üres = alapértelmezett.</value>
+  </data>
+  <data name="TbSettingsFragmentInterval" xml:space="preserve">
+    <value>Fragment intervallum</value>
+  </data>
+  <data name="TbSettingsFragmentIntervalTip" xml:space="preserve">
+    <value>Késleltetés a fragmented csomagok között ms-ben (pl. 10-20). Tartomány 1-100. Az első érték ≤ második. Üres = alapértelmezett.</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplit" xml:space="preserve">
+    <value>Max darabolás</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplitTip" xml:space="preserve">
+    <value>Maximális darabolások száma (0 = korlátlan, 0-10000). Csak Xray-core. Üres = alapértelmezett.</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelay" xml:space="preserve">
+    <value>Fallback késleltetés</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelayTip" xml:space="preserve">
+    <value>TLS fragment fallback késleltetés. Csak sing-box. Üres = alapértelmezett.</value>
+  </data>
+  <data name="FillFragmentParameterError" xml:space="preserve">
+    <value>Érvénytelen tartomány formátum. Használja 'from-to' (pl. 50-100).</value>
+  </data>
  <data name="TbSettingsEnableCacheFile4Sbox" xml:space="preserve">
    <value>Gyorsítótár fájl engedélyezése sing-boxhoz (szabálykészlet fájlok)</value>
  </data>
--- a/v2rayN/ServiceLib/Resx/ResUI.id.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.id.resx
@@ -1104,6 +1104,39 @@
  <data name="TbSettingsEnableFragment" xml:space="preserve">
    <value>Aktifkan fragment</value>
  </data>
+  <data name="TbSettingsFragmentPackets" xml:space="preserve">
+    <value>Paket Fragment</value>
+  </data>
+  <data name="TbSettingsFragmentPacketsTip" xml:space="preserve">
+    <value>Paket untuk difragmentasikan: tlshello (TLS ClientHello) atau 1-1 s.d. 1-5 (N paket TCP pertama)</value>
+  </data>
+  <data name="TbSettingsFragmentLength" xml:space="preserve">
+    <value>Panjang Fragment</value>
+  </data>
+  <data name="TbSettingsFragmentLengthTip" xml:space="preserve">
+    <value>Rentang ukuran fragment (byte), cth: 50-100. Nilai pertama harus ≤ kedua. Kosong = default.</value>
+  </data>
+  <data name="TbSettingsFragmentInterval" xml:space="preserve">
+    <value>Interval Fragment</value>
+  </data>
+  <data name="TbSettingsFragmentIntervalTip" xml:space="preserve">
+    <value>Jeda antar fragment (ms), cth: 10-20. Rentang 1-100. Nilai pertama harus ≤ kedua. Kosong = default.</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplit" xml:space="preserve">
+    <value>Maks Split</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplitTip" xml:space="preserve">
+    <value>Maks jumlah split (0 = unlimited, 0-10000). Hanya Xray-core. Kosong = default.</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelay" xml:space="preserve">
+    <value>Fallback Delay</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelayTip" xml:space="preserve">
+    <value>Delay fallback untuk TLS fragment. Hanya sing-box. Kosong = default.</value>
+  </data>
+  <data name="FillFragmentParameterError" xml:space="preserve">
+    <value>Format range tidak valid. Gunakan 'from-to' (cth: 50-100).</value>
+  </data>
  <data name="TbSettingsEnableCacheFile4Sbox" xml:space="preserve">
    <value>Aktifkan file cache untuk sing-box (file ruleset)</value>
  </data>
--- a/v2rayN/ServiceLib/Resx/ResUI.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.resx
@@ -1104,6 +1104,39 @@
  <data name="TbSettingsEnableFragment" xml:space="preserve">
    <value>Enable fragment</value>
  </data>
+  <data name="TbSettingsFragmentPackets" xml:space="preserve">
+    <value>Fragment Packets</value>
+  </data>
+  <data name="TbSettingsFragmentPacketsTip" xml:space="preserve">
+    <value>Packets to fragment: tlshello (TLS ClientHello) or 1-1 to 1-5 (first N TCP packets)</value>
+  </data>
+  <data name="TbSettingsFragmentLength" xml:space="preserve">
+    <value>Fragment Length</value>
+  </data>
+  <data name="TbSettingsFragmentLengthTip" xml:space="preserve">
+    <value>Fragment size range in bytes (e.g., 50-100). First value must be &lt;= second. Empty = default.</value>
+  </data>
+  <data name="TbSettingsFragmentInterval" xml:space="preserve">
+    <value>Fragment Interval</value>
+  </data>
+  <data name="TbSettingsFragmentIntervalTip" xml:space="preserve">
+    <value>Delay between fragments in ms (e.g., 10-20). Range 1-100. First value must be &lt;= second. Empty = default.</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplit" xml:space="preserve">
+    <value>Max Split</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplitTip" xml:space="preserve">
+    <value>Maximum number of fragments per packet (0-10000, 0 = unlimited). Xray only. Empty = default.</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelay" xml:space="preserve">
+    <value>Fallback Delay</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelayTip" xml:space="preserve">
+    <value>Fallback delay when ACK detection unavailable (e.g., 500ms). sing-box only. Empty = default.</value>
+  </data>
+  <data name="FillFragmentParameterError" xml:space="preserve">
+    <value>Invalid range format. Use 'from-to' (e.g., 50-100).</value>
+  </data>
  <data name="TbSettingsEnableCacheFile4Sbox" xml:space="preserve">
    <value>Enable cache file for sing-box (ruleset files)</value>
  </data>
--- a/v2rayN/ServiceLib/Resx/ResUI.ru.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.ru.resx
@@ -1104,6 +1104,39 @@
  <data name="TbSettingsEnableFragment" xml:space="preserve">
    <value>Включить фрагментацию (Fragment)</value>
  </data>
+  <data name="TbSettingsFragmentPackets" xml:space="preserve">
+    <value>Пакеты для фрагментации</value>
+  </data>
+  <data name="TbSettingsFragmentPacketsTip" xml:space="preserve">
+    <value>Пакеты для фрагментации: tlshello (TLS ClientHello) или 1-1 — 1-5 (первые N TCP-пакетов)</value>
+  </data>
+  <data name="TbSettingsFragmentLength" xml:space="preserve">
+    <value>Длина фрагмента</value>
+  </data>
+  <data name="TbSettingsFragmentLengthTip" xml:space="preserve">
+    <value>Диапазон размера фрагмента в байтах (например, 50-100). Первое значение не больше второго. Пусто = по умолчанию.</value>
+  </data>
+  <data name="TbSettingsFragmentInterval" xml:space="preserve">
+    <value>Интервал фрагментации</value>
+  </data>
+  <data name="TbSettingsFragmentIntervalTip" xml:space="preserve">
+    <value>Задержка между фрагментами в мс (например, 10-20). Диапазон 1-100. Первое значение не больше второго. Пусто = по умолчанию.</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplit" xml:space="preserve">
+    <value>Макс. разделение</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplitTip" xml:space="preserve">
+    <value>Максимальное число разделений (0 = без лимита, 0-10000). Только для Xray-core. Пусто = по умолчанию.</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelay" xml:space="preserve">
+    <value>Резервная задержка</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelayTip" xml:space="preserve">
+    <value>Резервная задержка для TLS-фрагмента. Только для sing-box. Пусто = по умолчанию.</value>
+  </data>
+  <data name="FillFragmentParameterError" xml:space="preserve">
+    <value>Неверный формат диапазона. Используйте 'from-to' (например, 50-100).</value>
+  </data>
  <data name="TbSettingsEnableCacheFile4Sbox" xml:space="preserve">
    <value>Включить файл кэша для sing-box (файлы наборов правил)</value>
  </data>
--- a/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
@@ -1101,6 +1101,39 @@
  <data name="TbSettingsEnableFragment" xml:space="preserve">
    <value>启用分片 (Fragment)</value>
  </data>
+  <data name="TbSettingsFragmentPackets" xml:space="preserve">
+    <value>分片包类型</value>
+  </data>
+  <data name="TbSettingsFragmentPacketsTip" xml:space="preserve">
+    <value>要分片的包类型: tlshello (TLS ClientHello) 或 1-1 到 1-5 (前 N 个 TCP 包)</value>
+  </data>
+  <data name="TbSettingsFragmentLength" xml:space="preserve">
+    <value>分片长度</value>
+  </data>
+  <data name="TbSettingsFragmentLengthTip" xml:space="preserve">
+    <value>分片大小范围(字节), 如 50-100. 第一个值必须 &lt;= 第二个值. 留空使用默认值.</value>
+  </data>
+  <data name="TbSettingsFragmentInterval" xml:space="preserve">
+    <value>分片间隔</value>
+  </data>
+  <data name="TbSettingsFragmentIntervalTip" xml:space="preserve">
+    <value>分片间延迟(毫秒), 如 10-20. 范围 1-100. 第一个值必须 &lt;= 第二个值. 留空使用默认值.</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplit" xml:space="preserve">
+    <value>最大分片数</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplitTip" xml:space="preserve">
+    <value>每个包最大分片数 (0-10000, 0=无限制). 仅 Xray. 留空使用默认值.</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelay" xml:space="preserve">
+    <value>回退延迟</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelayTip" xml:space="preserve">
+    <value>ACK 检测不可用时的回退延迟 (如 500ms). 仅 sing-box. 留空使用默认值.</value>
+  </data>
+  <data name="FillFragmentParameterError" xml:space="preserve">
+    <value>无效的范围格式。请使用 'from-to' (如 50-100)。</value>
+  </data>
  <data name="TbSettingsEnableCacheFile4Sbox" xml:space="preserve">
    <value>启用 sing-box (规则集文件) 的缓存文件</value>
  </data>
--- a/v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx
@@ -1101,6 +1101,39 @@
  <data name="TbSettingsEnableFragment" xml:space="preserve">
    <value>啟用分片（Fragment）</value>
  </data>
+  <data name="TbSettingsFragmentPackets" xml:space="preserve">
+    <value>分片封包類型</value>
+  </data>
+  <data name="TbSettingsFragmentPacketsTip" xml:space="preserve">
+    <value>要分片的封包類型：tlshello (TLS ClientHello) 或 1-1 到 1-5 (前 N 個 TCP 封包)</value>
+  </data>
+  <data name="TbSettingsFragmentLength" xml:space="preserve">
+    <value>分片長度</value>
+  </data>
+  <data name="TbSettingsFragmentLengthTip" xml:space="preserve">
+    <value>分片大小範圍(位元組)，如 50-100。第一個值必須 &lt;= 第二個值。留空使用預設值。</value>
+  </data>
+  <data name="TbSettingsFragmentInterval" xml:space="preserve">
+    <value>分片間隔</value>
+  </data>
+  <data name="TbSettingsFragmentIntervalTip" xml:space="preserve">
+    <value>分片間延遲(毫秒)，如 10-20。範圍 1-100。第一個值必須 &lt;= 第二個值。留空使用預設值。</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplit" xml:space="preserve">
+    <value>最大分片數</value>
+  </data>
+  <data name="TbSettingsFragmentMaxSplitTip" xml:space="preserve">
+    <value>每個封包最大分片數 (0-10000, 0=無限制)。僅 Xray。留空使用預設值。</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelay" xml:space="preserve">
+    <value>回退延遲</value>
+  </data>
+  <data name="TbSettingsFragmentFallbackDelayTip" xml:space="preserve">
+    <value>ACK 偵測不可用時的回退延遲 (如 500ms)。僅 sing-box。留空使用預設值。</value>
+  </data>
+  <data name="FillFragmentParameterError" xml:space="preserve">
+    <value>無效的範圍格式。請使用 'from-to' (如 50-100)。</value>
+  </data>
  <data name="TbSettingsEnableCacheFile4Sbox" xml:space="preserve">
    <value>啟用 sing-box（規則集檔案）的快取檔案</value>
  </data>
--- a/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayOutboundService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayOutboundService.cs
@@ -896,9 +896,17 @@ public partial class CoreConfigV2rayService

    private (Mask4Ray tcpFragment, Mask4Ray udpNoise) BuildFragmentsMasks()
    {
-        var configPackets = _config.Fragment4RayItem?.Packets ?? "tlshello";
-        var configLength = _config.Fragment4RayItem?.Length ?? "50-100";
-        var configDelay = _config.Fragment4RayItem?.Interval ?? "10-20";
+        var configPackets = _config.Fragment4RayItem?.Packets.NullIfEmpty() ?? "tlshello";
+        var configLength = _config.Fragment4RayItem?.Length.NullIfEmpty() ?? "50-100";
+        var configDelay = _config.Fragment4RayItem?.Interval.NullIfEmpty() ?? "10-20";
+        var configMaxSplit = _config.Fragment4RayItem?.MaxSplit.NullIfEmpty() ?? "0";
+
+        var maxSplit = 0;
+        var parts = configMaxSplit.Split('-');
+        if (parts.Length > 0 && int.TryParse(parts[0], out var ms))
+        {
+            maxSplit = ms;
+        }

        var fragmentMask = new Mask4Ray
        {
@@ -908,6 +916,7 @@ public partial class CoreConfigV2rayService
                packets = configPackets,
                length = configLength,
                delay = configDelay,
+                maxSplit = maxSplit,
            }
        };
        var noiseMask = new Mask4Ray
--- a/v2rayN/ServiceLib/ViewModels/OptionSettingViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/OptionSettingViewModel.cs
@@ -26,6 +26,10 @@ public class OptionSettingViewModel : MyReactiveObject
    [Reactive] public int? HyDownMbps { get; set; }
    [Reactive] public bool EnableFragment { get; set; }
    [Reactive] public bool EnableFinalFragment { get; set; }
+    [Reactive] public string FragmentPackets { get; set; }
+    [Reactive] public string FragmentLength { get; set; }
+    [Reactive] public string FragmentInterval { get; set; }
+    [Reactive] public string FragmentMaxSplit { get; set; }

    #endregion Core

@@ -163,6 +167,10 @@ public class OptionSettingViewModel : MyReactiveObject
        HyDownMbps = _config.HysteriaItem.DownMbps;
        EnableFragment = _config.CoreBasicItem.EnableFragment;
        EnableFinalFragment = _config.CoreBasicItem.EnableFinalFragment;
+        FragmentPackets = _config.Fragment4RayItem?.Packets;
+        FragmentLength = _config.Fragment4RayItem?.Length;
+        FragmentInterval = _config.Fragment4RayItem?.Interval;
+        FragmentMaxSplit = _config.Fragment4RayItem?.MaxSplit;

        #endregion Core

@@ -343,8 +351,31 @@ public class OptionSettingViewModel : MyReactiveObject
        _config.CoreBasicItem.EnableCacheFile4Sbox = EnableCacheFile4Sbox;
        _config.HysteriaItem.UpMbps = HyUpMbps ?? 0;
        _config.HysteriaItem.DownMbps = HyDownMbps ?? 0;
+        if (EnableFragment)
+        {
+            if (!Utils.TryParseRange(FragmentLength, 0, int.MaxValue, out _, out _))
+            {
+                NoticeManager.Instance.Enqueue(ResUI.FillFragmentParameterError);
+                return;
+            }
+            if (!Utils.TryParseRange(FragmentInterval, 1, 100, out _, out _))
+            {
+                NoticeManager.Instance.Enqueue(ResUI.FillFragmentParameterError);
+                return;
+            }
+            if (FragmentMaxSplit.IsNotEmpty()
+                && !Utils.TryParseMaxSplit(FragmentMaxSplit, 0, 10000, out _, out _))
+            {
+                NoticeManager.Instance.Enqueue(ResUI.FillFragmentParameterError);
+                return;
+            }
+        }
        _config.CoreBasicItem.EnableFragment = EnableFragment;
        _config.CoreBasicItem.EnableFinalFragment = EnableFinalFragment;
+        _config.Fragment4RayItem.Packets = FragmentPackets;
+        _config.Fragment4RayItem.Length = FragmentLength;
+        _config.Fragment4RayItem.Interval = FragmentInterval;
+        _config.Fragment4RayItem.MaxSplit = FragmentMaxSplit;

        _config.GuiItem.AutoRun = AutoRun;
        _config.GuiItem.EnableStatistics = EnableStatistics;
--- a/v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml
+++ b/v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml
@@ -300,6 +300,115 @@
                            Margin="{StaticResource Margin4}"
                            HorizontalAlignment="Left" />

+                        <Button
+                            Grid.Row="20"
+                            Grid.Column="2"
+                            Margin="{StaticResource MarginLr8}"
+                            HorizontalAlignment="Left"
+                            Classes="IconButton">
+                            <Button.Content>
+                                <PathIcon Data="{StaticResource SemiIconMore}">
+                                    <PathIcon.RenderTransform>
+                                        <RotateTransform Angle="90" />
+                                    </PathIcon.RenderTransform>
+                                </PathIcon>
+                            </Button.Content>
+                            <Button.Flyout>
+                                <Flyout>
+                                    <StackPanel Margin="{StaticResource Margin8}">
+                                        <Grid ColumnDefinitions="Auto,Auto,400" RowDefinitions="Auto,Auto,Auto,Auto,Auto">
+                                            <TextBlock
+                                                Grid.Row="0"
+                                                Grid.Column="0"
+                                                Margin="{StaticResource Margin4}"
+                                                VerticalAlignment="Center"
+                                                Text="{x:Static resx:ResUI.TbSettingsFragmentPackets}" />
+                                            <ComboBox
+                                                x:Name="cmbFragmentPackets"
+                                                Grid.Row="0"
+                                                Grid.Column="1"
+                                                Width="120"
+                                                Margin="{StaticResource Margin4}"
+                                                HorizontalAlignment="Left" />
+                                            <TextBlock
+                                                Grid.Row="0"
+                                                Grid.Column="2"
+                                                Margin="{StaticResource Margin4}"
+                                                VerticalAlignment="Center"
+                                                Text="{x:Static resx:ResUI.TbSettingsFragmentPacketsTip}"
+                                                TextWrapping="Wrap" />
+
+                                            <TextBlock
+                                                Grid.Row="1"
+                                                Grid.Column="0"
+                                                Margin="{StaticResource Margin4}"
+                                                VerticalAlignment="Center"
+                                                Text="{x:Static resx:ResUI.TbSettingsFragmentLength}" />
+                                            <TextBox
+                                                x:Name="txtFragmentLength"
+                                                Grid.Row="1"
+                                                Grid.Column="1"
+                                                Width="120"
+                                                Margin="{StaticResource Margin4}"
+                                                HorizontalAlignment="Left"
+                                                Watermark="50-100" />
+                                            <TextBlock
+                                                Grid.Row="1"
+                                                Grid.Column="2"
+                                                Margin="{StaticResource Margin4}"
+                                                VerticalAlignment="Center"
+                                                Text="{x:Static resx:ResUI.TbSettingsFragmentLengthTip}"
+                                                TextWrapping="Wrap" />
+
+                                            <TextBlock
+                                                Grid.Row="2"
+                                                Grid.Column="0"
+                                                Margin="{StaticResource Margin4}"
+                                                VerticalAlignment="Center"
+                                                Text="{x:Static resx:ResUI.TbSettingsFragmentInterval}" />
+                                            <TextBox
+                                                x:Name="txtFragmentInterval"
+                                                Grid.Row="2"
+                                                Grid.Column="1"
+                                                Width="120"
+                                                Margin="{StaticResource Margin4}"
+                                                HorizontalAlignment="Left"
+                                                Watermark="10-20" />
+                                            <TextBlock
+                                                Grid.Row="2"
+                                                Grid.Column="2"
+                                                Margin="{StaticResource Margin4}"
+                                                VerticalAlignment="Center"
+                                                Text="{x:Static resx:ResUI.TbSettingsFragmentIntervalTip}"
+                                                TextWrapping="Wrap" />
+
+                                            <TextBlock
+                                                Grid.Row="3"
+                                                Grid.Column="0"
+                                                Margin="{StaticResource Margin4}"
+                                                VerticalAlignment="Center"
+                                                Text="{x:Static resx:ResUI.TbSettingsFragmentMaxSplit}" />
+                                            <TextBox
+                                                x:Name="txtFragmentMaxSplit"
+                                                Grid.Row="3"
+                                                Grid.Column="1"
+                                                Width="120"
+                                                Margin="{StaticResource Margin4}"
+                                                HorizontalAlignment="Left"
+                                                Watermark="0" />
+                                            <TextBlock
+                                                Grid.Row="3"
+                                                Grid.Column="2"
+                                                Margin="{StaticResource Margin4}"
+                                                VerticalAlignment="Center"
+                                                Text="{x:Static resx:ResUI.TbSettingsFragmentMaxSplitTip}"
+                                                TextWrapping="Wrap" />
+                                        </Grid>
+                                    </StackPanel>
+                                </Flyout>
+                            </Button.Flyout>
+                        </Button>
+
                        <TextBlock
                            Grid.Row="21"
                            Grid.Column="0"
--- a/v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml.cs
+++ b/v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml.cs
@@ -1,4 +1,3 @@
-using Avalonia.Media;
 using v2rayN.Desktop.Base;
 using v2rayN.Desktop.Common;

@@ -36,6 +35,7 @@ public partial class OptionSettingWindow : WindowBase<OptionSettingViewModel>
        cmbMtu.ItemsSource = Global.TunMtus;
        cmbStack.ItemsSource = Global.TunStacks;
        cmbIcmpRoutingPolicy.ItemsSource = Global.TunIcmpRoutingPolicies;
+        cmbFragmentPackets.ItemsSource = Global.FragmentPacketsOptions;

        cmbCoreType1.ItemsSource = Global.CoreTypes;
        cmbCoreType2.ItemsSource = Global.CoreTypes;
@@ -84,6 +84,10 @@ public partial class OptionSettingWindow : WindowBase<OptionSettingViewModel>
            this.Bind(ViewModel, vm => vm.HyDownMbps, v => v.txtDownMbps.Text).DisposeWith(disposables);
            this.Bind(ViewModel, vm => vm.EnableFragment, v => v.togenableFragment.IsChecked).DisposeWith(disposables);
            this.Bind(ViewModel, vm => vm.EnableFinalFragment, v => v.togenableFinalFragment.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.FragmentPackets, v => v.cmbFragmentPackets.SelectedItem).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.FragmentLength, v => v.txtFragmentLength.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.FragmentInterval, v => v.txtFragmentInterval.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.FragmentMaxSplit, v => v.txtFragmentMaxSplit.Text).DisposeWith(disposables);

            this.Bind(ViewModel, vm => vm.AutoRun, v => v.togAutoRun.IsChecked).DisposeWith(disposables);
            this.Bind(ViewModel, vm => vm.EnableStatistics, v => v.togEnableStatistics.IsChecked).DisposeWith(disposables);
--- a/v2rayN/v2rayN/Views/OptionSettingWindow.xaml
+++ b/v2rayN/v2rayN/Views/OptionSettingWindow.xaml
@@ -17,6 +17,13 @@
    Style="{StaticResource WindowGlobal}"
    WindowStartupLocation="CenterScreen"
    mc:Ignorable="d">
+    <Window.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Popupbox.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Window.Resources>
    <DockPanel Margin="{StaticResource Margin8}">
        <StackPanel
            Margin="{StaticResource Margin4}"
@@ -366,6 +373,100 @@
                            Margin="{StaticResource Margin8}"
                            HorizontalAlignment="Left" />

+                        <materialDesign:PopupBox
+                            Grid.Row="20"
+                            Grid.Column="2"
+                            HorizontalAlignment="Left"
+                            StaysOpen="True"
+                            Style="{StaticResource MaterialDesignToolForegroundPopupBox}">
+                            <StackPanel Margin="{StaticResource Margin8}">
+                                <Grid>
+                                    <Grid.RowDefinitions>
+                                        <RowDefinition Height="Auto" />
+                                        <RowDefinition Height="Auto" />
+                                        <RowDefinition Height="Auto" />
+                                        <RowDefinition Height="Auto" />
+                                        <RowDefinition Height="Auto" />
+                                    </Grid.RowDefinitions>
+                                    <Grid.ColumnDefinitions>
+                                        <ColumnDefinition Width="Auto" />
+                                        <ColumnDefinition Width="Auto" />
+                                        <ColumnDefinition Width="400" />
+                                    </Grid.ColumnDefinitions>
+
+                                    <TextBlock
+                                        Grid.Row="0"
+                                        Grid.Column="0"
+                                        Margin="{StaticResource Margin8}"
+                                        VerticalAlignment="Center"
+                                        Style="{StaticResource ToolbarTextBlock}"
+                                        Text="{x:Static resx:ResUI.TbSettingsFragmentPackets}"
+                                        TextWrapping="Wrap" />
+                                    <ComboBox
+                                        x:Name="cmbFragmentPackets"
+                                        Grid.Row="0"
+                                        Grid.Column="1"
+                                        Width="200"
+                                        Margin="{StaticResource Margin8}"
+                                        VerticalAlignment="Center" />
+
+                                    <TextBlock
+                                        Grid.Row="1"
+                                        Grid.Column="0"
+                                        Margin="{StaticResource Margin8}"
+                                        VerticalAlignment="Center"
+                                        Style="{StaticResource ToolbarTextBlock}"
+                                        Text="{x:Static resx:ResUI.TbSettingsFragmentLength}"
+                                        TextWrapping="Wrap" />
+                                    <TextBox
+                                        x:Name="txtFragmentLength"
+                                        Grid.Row="1"
+                                        Grid.Column="1"
+                                        Width="200"
+                                        Margin="{StaticResource Margin8}"
+                                        VerticalAlignment="Center"
+                                        materialDesign:HintAssist.Hint="50-100"
+                                        Style="{StaticResource DefTextBox}" />
+
+                                    <TextBlock
+                                        Grid.Row="2"
+                                        Grid.Column="0"
+                                        Margin="{StaticResource Margin8}"
+                                        VerticalAlignment="Center"
+                                        Style="{StaticResource ToolbarTextBlock}"
+                                        Text="{x:Static resx:ResUI.TbSettingsFragmentInterval}"
+                                        TextWrapping="Wrap" />
+                                    <TextBox
+                                        x:Name="txtFragmentInterval"
+                                        Grid.Row="2"
+                                        Grid.Column="1"
+                                        Width="200"
+                                        Margin="{StaticResource Margin8}"
+                                        VerticalAlignment="Center"
+                                        materialDesign:HintAssist.Hint="10-20"
+                                        Style="{StaticResource DefTextBox}" />
+
+                                    <TextBlock
+                                        Grid.Row="3"
+                                        Grid.Column="0"
+                                        Margin="{StaticResource Margin8}"
+                                        VerticalAlignment="Center"
+                                        Style="{StaticResource ToolbarTextBlock}"
+                                        Text="{x:Static resx:ResUI.TbSettingsFragmentMaxSplit}"
+                                        TextWrapping="Wrap" />
+                                    <TextBox
+                                        x:Name="txtFragmentMaxSplit"
+                                        Grid.Row="3"
+                                        Grid.Column="1"
+                                        Width="200"
+                                        Margin="{StaticResource Margin8}"
+                                        VerticalAlignment="Center"
+                                        materialDesign:HintAssist.Hint="0"
+                                        Style="{StaticResource DefTextBox}" />
+                                </Grid>
+                            </StackPanel>
+                        </materialDesign:PopupBox>
+
                        <TextBlock
                            Grid.Row="21"
                            Grid.Column="0"
--- a/v2rayN/v2rayN/Views/OptionSettingWindow.xaml.cs
+++ b/v2rayN/v2rayN/Views/OptionSettingWindow.xaml.cs
@@ -32,6 +32,7 @@ public partial class OptionSettingWindow
        cmbMtu.ItemsSource = Global.TunMtus;
        cmbStack.ItemsSource = Global.TunStacks;
        cmbIcmpRoutingPolicy.ItemsSource = Global.TunIcmpRoutingPolicies;
+        cmbFragmentPackets.ItemsSource = Global.FragmentPacketsOptions;

        cmbCoreType1.ItemsSource = Global.CoreTypes;
        cmbCoreType2.ItemsSource = Global.CoreTypes;
@@ -80,6 +81,10 @@ public partial class OptionSettingWindow
            this.Bind(ViewModel, vm => vm.HyDownMbps, v => v.txtDownMbps.Text).DisposeWith(disposables);
            this.Bind(ViewModel, vm => vm.EnableFragment, v => v.togenableFragment.IsChecked).DisposeWith(disposables);
            this.Bind(ViewModel, vm => vm.EnableFinalFragment, v => v.togenableFinalFragment.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.FragmentPackets, v => v.cmbFragmentPackets.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.FragmentLength, v => v.txtFragmentLength.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.FragmentInterval, v => v.txtFragmentInterval.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.FragmentMaxSplit, v => v.txtFragmentMaxSplit.Text).DisposeWith(disposables);

            //this.Bind(ViewModel, vm => vm.Kcpmtu, v => v.txtKcpmtu.Text).DisposeWith(disposables);
            //this.Bind(ViewModel, vm => vm.Kcptti, v => v.txtKcptti.Text).DisposeWith(disposables);