Merge fe14f0a94c into a1490d0ac1

v2rayN/ServiceLib/Enums/ESpeedActionType.cs

@@ -4,6 +4,7 @@ public enum ESpeedActionType
 {
     Tcping,
     Realping,
+    UdpTest,
     Speedtest,
     Mixedtest
 }

v2rayN/ServiceLib/Enums/EUdpTest.cs

@@ -0,0 +1,7 @@
+namespace ServiceLib.Enums;
+public enum EUdpTest
+{
+    NTP,
+    DNS,
+    STUN,
+}

v2rayN/ServiceLib/Models/ConfigItems.cs

@@ -158,6 +158,8 @@ public class SpeedTestItem
     public string SpeedPingTestUrl { get; set; }
     public int MixedConcurrencyCount { get; set; }
     public string IPAPIUrl { get; set; }
+    public EUdpTest UdpTestType { get; set; }
+    public string UdpTestUrl { get; set; }
 }
 
 [Serializable]

v2rayN/ServiceLib/Resx/ResUI.Designer.cs

@@ -1860,6 +1860,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Test Configurations UDP Delay 的本地化字符串。
+        /// </summary>
+        public static string menuUdpTestServer {
+            get {
+                return ResourceManager.GetString("menuUdpTestServer", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 {0} Website 的本地化字符串。
         /// </summary>
@@ -4038,6 +4047,24 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 UDP Test Type 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsUdpTestType {
+            get {
+                return ResourceManager.GetString("TbSettingsUdpTestType", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 UDP Test Url 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsUdpTestUrl {
+            get {
+                return ResourceManager.GetString("TbSettingsUdpTestUrl", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Auth user 的本地化字符串。
         /// </summary>

v2rayN/ServiceLib/Resx/ResUI.fa-Ir.resx

@@ -1593,4 +1593,13 @@
   <data name="TbRuleTypeTips" xml:space="preserve">
     <value>You can set separate rules for Routing and DNS, or select "ALL" to apply to both</value>
   </data>
+  <data name="menuUdpTestServer" xml:space="preserve">
+    <value>Test Configurations UDP Delay</value>
+  </data>
+  <data name="TbSettingsUdpTestType" xml:space="preserve">
+    <value>UDP Test Type</value>
+  </data>
+  <data name="TbSettingsUdpTestUrl" xml:space="preserve">
+    <value>UDP Test Url</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.hu.resx

@@ -1593,4 +1593,13 @@
   <data name="TbRuleType" xml:space="preserve">
     <value>Rule Type</value>
   </data>
+  <data name="menuUdpTestServer" xml:space="preserve">
+    <value>Test Configurations UDP Delay</value>
+  </data>
+  <data name="TbSettingsUdpTestType" xml:space="preserve">
+    <value>UDP Test Type</value>
+  </data>
+  <data name="TbSettingsUdpTestUrl" xml:space="preserve">
+    <value>UDP Test Url</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.resx

@@ -1593,4 +1593,13 @@
   <data name="TbRuleType" xml:space="preserve">
     <value>Rule Type</value>
   </data>
+  <data name="menuUdpTestServer" xml:space="preserve">
+    <value>Test Configurations UDP Delay</value>
+  </data>
+  <data name="TbSettingsUdpTestType" xml:space="preserve">
+    <value>UDP Test Type</value>
+  </data>
+  <data name="TbSettingsUdpTestUrl" xml:space="preserve">
+    <value>UDP Test Url</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.ru.resx

@@ -1593,4 +1593,13 @@
   <data name="TbRuleType" xml:space="preserve">
     <value>Rule Type</value>
   </data>
+  <data name="menuUdpTestServer" xml:space="preserve">
+    <value>Test Configurations UDP Delay</value>
+  </data>
+  <data name="TbSettingsUdpTestType" xml:space="preserve">
+    <value>UDP Test Type</value>
+  </data>
+  <data name="TbSettingsUdpTestUrl" xml:space="preserve">
+    <value>UDP Test Url</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx

@@ -1590,4 +1590,13 @@
   <data name="TbRuleTypeTips" xml:space="preserve">
     <value>可对 Routing 和 DNS 单独设定规则，ALL 则都生效</value>
   </data>
+  <data name="menuUdpTestServer" xml:space="preserve">
+    <value>测试配置文件 UDP 延迟 (多选)</value>
+  </data>
+  <data name="TbSettingsUdpTestType" xml:space="preserve">
+    <value>UDP 测试类型</value>
+  </data>
+  <data name="TbSettingsUdpTestUrl" xml:space="preserve">
+    <value>UDP 测试地址</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx

@@ -1590,4 +1590,13 @@
   <data name="TbRuleTypeTips" xml:space="preserve">
     <value>可对 Routing 和 DNS 单独设定规则，ALL 则都生效</value>
   </data>
+  <data name="menuUdpTestServer" xml:space="preserve">
+    <value>Test Configurations UDP Delay</value>
+  </data>
+  <data name="TbSettingsUdpTestType" xml:space="preserve">
+    <value>UDP Test Type</value>
+  </data>
+  <data name="TbSettingsUdpTestUrl" xml:space="preserve">
+    <value>UDP Test Url</value>
+  </data>
 </root>

v2rayN/ServiceLib/Services/CoreConfig/V2ray/CoreConfigV2rayService.cs

@@ -341,6 +341,11 @@ public partial class CoreConfigV2rayService(Config config)
                     listen = Global.Loopback,
                     port = port,
                     protocol = EInboundProtocol.mixed.ToString(),
+                    settings = new Inboundsettings4Ray()
+                    {
+                        udp = true,
+                        auth = "noauth"
+                    },
                 };
                 inbound.tag = inbound.protocol + inbound.port.ToString();
                 v2rayConfig.inbounds.Add(inbound);
@@ -418,6 +423,11 @@ public partial class CoreConfigV2rayService(Config config)
                 listen = Global.Loopback,
                 port = port,
                 protocol = EInboundProtocol.mixed.ToString(),
+                settings = new Inboundsettings4Ray()
+                {
+                    udp = true,
+                    auth = "noauth"
+                },
             });
 
             ret.Msg = string.Format(ResUI.SuccessfulConfiguration, "");

v2rayN/ServiceLib/Services/SpeedtestService.cs

@@ -2,6 +2,7 @@ using System.Collections.Concurrent;
 using System.Diagnostics;
 using System.Net;
 using System.Net.Sockets;
+using ServiceLib.Services.Udp;
 
 namespace ServiceLib.Services;
 
@@ -49,6 +50,10 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
                 await RunRealPingBatchAsync(lstSelected, exitLoopKey);
                 break;
 
+            case ESpeedActionType.UdpTest:
+                await RunUdpTestBatchAsync(lstSelected, exitLoopKey);
+                break;
+
             case ESpeedActionType.Speedtest:
                 await RunMixedTestAsync(lstSelected, 1, true, exitLoopKey);
                 break;
@@ -91,6 +96,7 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
             {
                 case ESpeedActionType.Tcping:
                 case ESpeedActionType.Realping:
+                case ESpeedActionType.UdpTest:
                     await UpdateFunc(it.IndexId, ResUI.Speedtesting, "");
                     ProfileExManager.Instance.SetTestDelay(it.IndexId, 0);
                     break;
@@ -216,6 +222,80 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
         return true;
     }
 
+    private async Task RunUdpTestBatchAsync(List<ServerTestItem> lstSelected, string exitLoopKey, int pageSize = 0)
+    {
+        if (pageSize <= 0)
+        {
+            pageSize = lstSelected.Count < Global.SpeedTestPageSize ? lstSelected.Count : Global.SpeedTestPageSize;
+        }
+        var lstTest = GetTestBatchItem(lstSelected, pageSize);
+
+        List<ServerTestItem> lstFailed = new();
+        foreach (var lst in lstTest)
+        {
+            var ret = await RunUdpTestAsync(lst, exitLoopKey);
+            if (ret == false)
+            {
+                lstFailed.AddRange(lst);
+            }
+            await Task.Delay(100);
+        }
+
+        //Retest the failed part
+        if (lstFailed.Count > 0)
+        {
+            if (_lstExitLoop.Any(p => p == exitLoopKey) == false)
+            {
+                await UpdateFunc("", ResUI.SpeedtestingSkip);
+                return;
+            }
+
+            await UpdateFunc("", string.Format(ResUI.SpeedtestingTestFailedPart, lstFailed.Count));
+
+            await RunUdpTestAsync(lstFailed, exitLoopKey);
+        }
+    }
+
+    private async Task<bool> RunUdpTestAsync(List<ServerTestItem> selecteds, string exitLoopKey)
+    {
+        ProcessService processService = null;
+        try
+        {
+            processService = await CoreManager.Instance.LoadCoreConfigSpeedtest(selecteds);
+            if (processService is null)
+            {
+                return false;
+            }
+            await Task.Delay(1000);
+
+            List<Task> tasks = new();
+            foreach (var it in selecteds)
+            {
+                if (!it.AllowTest)
+                {
+                    continue;
+                }
+                tasks.Add(Task.Run(async () =>
+                {
+                    await DoUdpTest(it);
+                }));
+            }
+            await Task.WhenAll(tasks);
+        }
+        catch (Exception ex)
+        {
+            Logging.SaveLog(_tag, ex);
+        }
+        finally
+        {
+            if (processService != null)
+            {
+                await processService?.StopAsync();
+            }
+        }
+        return true;
+    }
+
     private async Task RunMixedTestAsync(List<ServerTestItem> selecteds, int concurrencyCount, bool blSpeedTest, string exitLoopKey)
     {
         using var concurrencySemaphore = new SemaphoreSlim(concurrencyCount);
@@ -302,6 +382,27 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
         });
     }
 
+    private async Task<int> DoUdpTest(ServerTestItem it)
+    {
+        UdpService udpService = _config.SpeedTestItem.UdpTestType switch
+        {
+            EUdpTest.NTP => new NtpService(),
+            EUdpTest.DNS => new DnsService(),
+            EUdpTest.STUN => new StunService(),
+            _ => new NtpService(),
+        };
+        var responseTime = -1;
+        try
+        {
+            responseTime = (int)(await udpService.SendUdpRequestAsync(_config.SpeedTestItem.UdpTestUrl, it.Port, TimeSpan.FromSeconds(10))).TotalMilliseconds;
+        }
+        catch
+        { }
+        ProfileExManager.Instance.SetTestDelay(it.IndexId, responseTime);
+        await UpdateFunc(it.IndexId, responseTime.ToString());
+        return responseTime;
+    }
+
     private async Task<int> GetTcpingTime(string url, int port)
     {
         var responseTime = -1;

v2rayN/ServiceLib/Services/Udp/DnsService.cs

@@ -0,0 +1,108 @@
+using System.Buffers.Binary;
+using System.Text;
+
+namespace ServiceLib.Services.Udp;
+public class DnsService : UdpService
+{
+    private const int DnsDefaultPort = 53;
+    private const string DnsDefaultServer = "8.8.8.8"; // Google Public DNS
+    private const string QueryDomain = "www.google.com";
+
+    protected override byte[] BuildUdpRequestPacket()
+    {
+        // DNS Query for www.google.com A record
+        using var ms = new MemoryStream();
+        using var writer = new BinaryWriter(ms);
+
+        // Transaction ID (random 2 bytes)
+        writer.Write(BinaryPrimitives.ReverseEndianness((ushort)0x1234));
+
+        // Flags: Standard query (0x0100)
+        // QR=0 (query), Opcode=0 (standard), RD=1 (recursion desired)
+        writer.Write(BinaryPrimitives.ReverseEndianness((ushort)0x0100));
+
+        // Questions: 1
+        writer.Write(BinaryPrimitives.ReverseEndianness((ushort)1));
+
+        // Answer RRs: 0
+        writer.Write(BinaryPrimitives.ReverseEndianness((ushort)0));
+
+        // Authority RRs: 0
+        writer.Write(BinaryPrimitives.ReverseEndianness((ushort)0));
+
+        // Additional RRs: 0
+        writer.Write(BinaryPrimitives.ReverseEndianness((ushort)0));
+
+        // Question section
+        // Domain name: www.google.com
+        var labels = QueryDomain.Split('.');
+        foreach (var label in labels)
+        {
+            writer.Write((byte)label.Length);
+            writer.Write(Encoding.ASCII.GetBytes(label));
+        }
+        writer.Write((byte)0); // End of domain name
+
+        // Type: A (0x0001)
+        writer.Write(BinaryPrimitives.ReverseEndianness((ushort)1));
+
+        // Class: IN (0x0001)
+        writer.Write(BinaryPrimitives.ReverseEndianness((ushort)1));
+
+        return ms.ToArray();
+    }
+
+    protected override bool VerifyAndExtractUdpResponse(byte[] dnsResponseBytes)
+    {
+        if (dnsResponseBytes == null || dnsResponseBytes.Length < 12)
+        {
+            return false;
+        }
+
+        try
+        {
+            // Check transaction ID (should match 0x1234)
+            var transactionId = BinaryPrimitives.ReadUInt16BigEndian(dnsResponseBytes.AsSpan(0, 2));
+            if (transactionId != 0x1234)
+            {
+                return false;
+            }
+
+            // Check flags - should be a response (QR=1)
+            var flags = BinaryPrimitives.ReadUInt16BigEndian(dnsResponseBytes.AsSpan(2, 2));
+            if ((flags & 0x8000) == 0)
+            {
+                return false; // Not a response
+            }
+
+            // Check response code (RCODE) - should be 0 (no error)
+            if ((flags & 0x000F) != 0)
+            {
+                return false; // DNS error
+            }
+
+            // Check answer count
+            var answerCount = BinaryPrimitives.ReadUInt16BigEndian(dnsResponseBytes.AsSpan(6, 2));
+            if (answerCount == 0)
+            {
+                return false; // No answers
+            }
+
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    protected override ushort GetDefaultTargetPort()
+    {
+        return DnsDefaultPort;
+    }
+
+    protected override string GetDefaultTargetHost()
+    {
+        return DnsDefaultServer;
+    }
+}

v2rayN/ServiceLib/Services/Udp/NtpService.cs

@@ -0,0 +1,48 @@
+using System.Buffers.Binary;
+
+namespace ServiceLib.Services.Udp;
+public class NtpService : UdpService
+{
+    private const int NtpDefaultPort = 123;
+    private const string NtpDefaultServer = "pool.ntp.org";
+
+    protected override byte[] BuildUdpRequestPacket()
+    {
+        var ntpReq = new byte[48];
+        ntpReq[0] = 0x23; // LI=0, VN=4, Mode=3
+        return ntpReq;
+    }
+
+    protected override bool VerifyAndExtractUdpResponse(byte[] ntpResponseBytes)
+    {
+        if (ntpResponseBytes == null || ntpResponseBytes.Length < 48)
+        {
+            return false;
+        }
+        if ((ntpResponseBytes[0] & 0x07) != 4)
+        {
+            return false;
+        }
+        try
+        {
+            var secsSince1900 = BinaryPrimitives.ReadUInt32BigEndian(ntpResponseBytes.AsSpan(40, 4));
+            const long ntpToUnixEpochOffsetSeconds = 2208988800L;
+            var unixSecs = (long)secsSince1900 - ntpToUnixEpochOffsetSeconds;
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    protected override ushort GetDefaultTargetPort()
+    {
+        return NtpDefaultPort;
+    }
+
+    protected override string GetDefaultTargetHost()
+    {
+        return NtpDefaultServer;
+    }
+}

v2rayN/ServiceLib/Services/Udp/Socks5UdpChannel.cs

@@ -0,0 +1,422 @@
+using System.Buffers.Binary;
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+
+namespace ServiceLib.Services.Udp;
+
+public class Socks5UdpChannel(string socks5Host, int socks5TcpPort) : IDisposable
+{
+    private TcpClient tcpClient;
+    private UdpClient udpClient;
+    private IPEndPoint relayEndPoint;
+
+    private bool _initialized = false;
+
+    /// <summary>
+    /// Send UDP data to a remote endpoint (IP address)
+    /// </summary>
+    public async Task SendAsync(IPEndPoint remote, byte[] data)
+    {
+        var addrData = new Socks5AddressData
+        {
+            AddressType = remote.Address.AddressFamily == AddressFamily.InterNetwork 
+                ? Socks5AddressData.AddrTypeIPv4 
+                : Socks5AddressData.AddrTypeIPv6,
+            Host = remote.Address.ToString(),
+            Port = (ushort)remote.Port
+        };
+        var packet = BuildSocks5UdpPacket(addrData, data);
+        await udpClient.SendAsync(packet, packet.Length, relayEndPoint);
+    }
+
+    /// <summary>
+    /// Send UDP data to a remote endpoint (domain name or IP address)
+    /// </summary>
+    /// <param name="host">Domain name or IP address</param>
+    /// <param name="port">Port number</param>
+    /// <param name="data">Data to send</param>
+    public async Task SendAsync(string host, ushort port, byte[] data)
+    {
+        var addrData = new Socks5AddressData();
+        
+        // Try to parse as IP address first
+        if (IPAddress.TryParse(host, out var ipAddr))
+        {
+            addrData.AddressType = ipAddr.AddressFamily == AddressFamily.InterNetwork 
+                ? Socks5AddressData.AddrTypeIPv4 
+                : Socks5AddressData.AddrTypeIPv6;
+            addrData.Host = ipAddr.ToString();
+        }
+        else
+        {
+            // Treat as domain name
+            addrData.AddressType = Socks5AddressData.AddrTypeDomain;
+            addrData.Host = host;
+        }
+        addrData.Port = port;
+        
+        var packet = BuildSocks5UdpPacket(addrData, data);
+        await udpClient.SendAsync(packet, packet.Length, relayEndPoint);
+    }
+
+    /// <summary>
+    /// Receive UDP data from remote endpoint
+    /// </summary>
+    /// <param name="cancellationToken">Cancellation token to cancel the receive operation</param>
+    /// <returns>Remote endpoint information and received data</returns>
+    public async Task<(Socks5RemoteEndpoint Remote, byte[] Data)> ReceiveAsync(CancellationToken cancellationToken = default)
+    {
+        var result = await udpClient.ReceiveAsync(cancellationToken).ConfigureAwait(false);
+        var (remote, payload) = ParseSocks5UdpPacket(result.Buffer);
+        return (remote, payload);
+    }
+
+    /// <summary>
+    /// Represents a remote endpoint that can be either an IP address or a domain name
+    /// </summary>
+    public class Socks5RemoteEndpoint(string host, ushort port, bool isDomain)
+    {
+        public string Host { get; set; } = host;
+        public ushort Port { get; set; } = port;
+        public bool IsDomain { get; set; } = isDomain;
+    }
+
+    private static byte[] BuildSocks5UdpPacket(Socks5AddressData addressData, byte[] data)
+    {
+        using var ms = new MemoryStream();
+        
+        // RSV (2 bytes) + FRAG (1 byte) - Reserved and Fragment fields
+        ms.WriteByte(0x00);
+        ms.WriteByte(0x00);
+        ms.WriteByte(0x00);
+
+        // Write address (ATYP + address + port)
+        ms.Write(addressData.ToBytes());
+
+        // User data payload
+        ms.Write(data);
+
+        return ms.ToArray();
+    }
+
+    private static (Socks5RemoteEndpoint Remote, byte[] Data) ParseSocks5UdpPacket(byte[] packet)
+    {
+        if (packet.Length < 10) // Minimum length: RSV(2) + FRAG(1) + ATYP(1) + IPv4(4) + Port(2) = 10
+        {
+            throw new ArgumentException("Invalid SOCKS5 UDP packet: too short");
+        }
+
+        var offset = 0;
+
+        // RSV (2 bytes) - Reserved field, skip
+        offset += 2;
+
+        // FRAG (1 byte) - Fragment number, currently only support 0 (no fragmentation)
+        var frag = packet[offset++];
+        if (frag != 0x00)
+        {
+            throw new NotSupportedException("SOCKS5 UDP fragmentation is not supported");
+        }
+
+        // ATYP (1 byte) - Address type
+        var addressType = packet[offset++];
+
+        string host;
+        int addressLength;
+        bool isDomain;
+
+        switch (addressType)
+        {
+            case Socks5AddressData.AddrTypeIPv4:
+                if (packet.Length < offset + 4)
+                {
+                    throw new ArgumentException("Invalid SOCKS5 UDP packet: IPv4 address incomplete");
+                }
+                var ipv4Bytes = new byte[4];
+                Array.Copy(packet, offset, ipv4Bytes, 0, 4);
+                host = new IPAddress(ipv4Bytes).ToString();
+                addressLength = 4;
+                isDomain = false;
+                break;
+
+            case Socks5AddressData.AddrTypeIPv6:
+                if (packet.Length < offset + 16)
+                {
+                    throw new ArgumentException("Invalid SOCKS5 UDP packet: IPv6 address incomplete");
+                }
+                var ipv6Bytes = new byte[16];
+                Array.Copy(packet, offset, ipv6Bytes, 0, 16);
+                host = new IPAddress(ipv6Bytes).ToString();
+                addressLength = 16;
+                isDomain = false;
+                break;
+
+            case Socks5AddressData.AddrTypeDomain:
+                if (packet.Length < offset + 1)
+                {
+                    throw new ArgumentException("Invalid SOCKS5 UDP packet: domain length missing");
+                }
+                var domainLength = packet[offset++];
+                if (packet.Length < offset + domainLength)
+                {
+                    throw new ArgumentException("Invalid SOCKS5 UDP packet: domain incomplete");
+                }
+                host = Encoding.ASCII.GetString(packet, offset, domainLength);
+                addressLength = domainLength;
+                isDomain = true;
+                break;
+
+            default:
+                throw new NotSupportedException($"Unsupported SOCKS5 address type: {addressType}");
+        }
+
+        offset += addressLength;
+
+        // Port (2 bytes, big-endian)
+        if (packet.Length < offset + 2)
+        {
+            throw new ArgumentException("Invalid SOCKS5 UDP packet: port incomplete");
+        }
+        var port = BinaryPrimitives.ReadUInt16BigEndian(packet.AsSpan(offset, 2));
+        offset += 2;
+
+        // Data (remaining bytes)
+        var dataLength = packet.Length - offset;
+        var data = new byte[dataLength];
+        if (dataLength > 0)
+        {
+            Array.Copy(packet, offset, data, 0, dataLength);
+        }
+
+        // Create remote endpoint without DNS resolution
+        var remote = new Socks5RemoteEndpoint(host, port, isDomain);
+        return (remote, data);
+    }
+
+    public void Dispose()
+    {
+        tcpClient.Dispose();
+        udpClient.Dispose();
+    }
+
+    #region SOCKS5 Connection Handling
+
+    private const byte Socks5Version = 0x05;
+    private const byte SocksCmdUdpAssociate = 0x03;
+
+    public async Task<bool> EstablishUdpAssociationAsync(CancellationToken cancellationToken)
+    {
+        if (_initialized)
+        {
+            Dispose();
+            _initialized = false;
+        }
+        udpClient = new UdpClient(new IPEndPoint(IPAddress.Any, 0));
+        var clientListenEp = (IPEndPoint)udpClient.Client.LocalEndPoint!;
+
+        tcpClient = new TcpClient();
+        try
+        {
+            await tcpClient.ConnectAsync(socks5Host, socks5TcpPort, cancellationToken).ConfigureAwait(false);
+        }
+        catch (SocketException)
+        {
+            return false;
+        }
+        var tcpControlStream = tcpClient.GetStream();
+
+        byte[] handshakeRequest = { Socks5Version, 0x01, 0x00 };
+        await tcpControlStream.WriteAsync(handshakeRequest, cancellationToken).ConfigureAwait(false);
+        var handshakeResponse = new byte[2];
+        if (await tcpControlStream.ReadAsync(handshakeResponse, cancellationToken).ConfigureAwait(false) < 2 ||
+            handshakeResponse[0] != Socks5Version || handshakeResponse[1] != 0x00)
+        {
+            return false;
+        }
+
+        var clientListenIp = clientListenEp.Address;
+        var clientAddrForSocks = new Socks5AddressData();
+        if (clientListenIp.Equals(IPAddress.Any))
+        {
+            clientAddrForSocks.AddressType = Socks5AddressData.AddrTypeIPv4;
+            clientAddrForSocks.Host = "0.0.0.0";
+        }
+        else if (clientListenIp.Equals(IPAddress.IPv6Any))
+        {
+            clientAddrForSocks.AddressType = Socks5AddressData.AddrTypeIPv6;
+            clientAddrForSocks.Host = "::";
+        }
+        else if (clientListenIp.IsIPv4MappedToIPv6)
+        {
+            clientAddrForSocks.AddressType = Socks5AddressData.AddrTypeIPv4;
+            clientAddrForSocks.Host = clientListenIp.MapToIPv4().ToString();
+        }
+        else if (clientListenIp.AddressFamily == AddressFamily.InterNetwork)
+        {
+            clientAddrForSocks.AddressType = Socks5AddressData.AddrTypeIPv4;
+            clientAddrForSocks.Host = clientListenIp.ToString();
+        }
+        else if (clientListenIp.AddressFamily == AddressFamily.InterNetworkV6)
+        {
+            clientAddrForSocks.AddressType = Socks5AddressData.AddrTypeIPv6;
+            clientAddrForSocks.Host = clientListenIp.ToString();
+        }
+        else
+        {
+            return false;
+        }
+        clientAddrForSocks.Port = (ushort)clientListenEp.Port;
+
+        using var udpAssociateReqMs = new MemoryStream();
+        udpAssociateReqMs.WriteByte(Socks5Version);
+        udpAssociateReqMs.WriteByte(SocksCmdUdpAssociate);
+        udpAssociateReqMs.WriteByte(0x00);
+        udpAssociateReqMs.Write(clientAddrForSocks.ToBytes());
+        await tcpControlStream.WriteAsync(udpAssociateReqMs.ToArray(), cancellationToken).ConfigureAwait(false);
+
+        var verRepRsv = new byte[3];
+        if (await tcpControlStream.ReadAsync(verRepRsv, cancellationToken).ConfigureAwait(false) < 3 ||
+            verRepRsv[0] != Socks5Version || verRepRsv[1] != 0x00)
+        {
+            return false;
+        }
+
+        var proxyRelaySocksAddr = await Socks5AddressData.ParseAsync(tcpControlStream, cancellationToken).ConfigureAwait(false);
+        if (proxyRelaySocksAddr == null || !IPAddress.TryParse(proxyRelaySocksAddr.Host, out var proxyRelayIp))
+        {
+            return false;
+        }
+
+        relayEndPoint = new IPEndPoint(proxyRelayIp, proxyRelaySocksAddr.Port);
+        _initialized = true;
+        return true;
+    }
+    #endregion
+
+    #region SOCKS5 Address Handling
+    private class Socks5AddressData
+    {
+        public const byte AddrTypeIPv4 = 0x01;
+        public const byte AddrTypeDomain = 0x03;
+        public const byte AddrTypeIPv6 = 0x04;
+
+        public byte AddressType { get; set; }
+        public string Host { get; set; } = string.Empty;
+        public ushort Port { get; set; }
+
+        public byte[] ToBytes()
+        {
+            using var ms = new MemoryStream();
+            ms.WriteByte(AddressType);
+            switch (AddressType)
+            {
+                case AddrTypeIPv4:
+                    if (IPAddress.TryParse(Host, out var ip) && ip.AddressFamily == AddressFamily.InterNetwork)
+                    {
+                        ms.Write(ip.GetAddressBytes(), 0, 4);
+                    }
+                    else
+                    {
+                        ms.Write(new byte[] { 0, 0, 0, 0 });
+                    }
+                    break;
+                case AddrTypeDomain:
+                    if (string.IsNullOrEmpty(Host))
+                    {
+                        ms.WriteByte(0);
+                    }
+                    else
+                    {
+                        var domainBytes = Encoding.ASCII.GetBytes(Host);
+                        ms.WriteByte((byte)domainBytes.Length);
+                        ms.Write(domainBytes);
+                    }
+                    break;
+                case AddrTypeIPv6:
+                    if (IPAddress.TryParse(Host, out var ip6) && ip6.AddressFamily == AddressFamily.InterNetworkV6)
+                    {
+                        ms.Write(ip6.GetAddressBytes(), 0, 16);
+                    }
+                    else
+                    {
+                        ms.Write(new byte[16]);
+                    }
+                    break;
+                default:
+                    throw new NotSupportedException($"SOCKS5 address type {AddressType} not supported.");
+            }
+            var portBytes = new byte[2];
+            BinaryPrimitives.WriteUInt16BigEndian(portBytes, Port);
+            ms.Write(portBytes);
+            return ms.ToArray();
+        }
+
+        public static async Task<Socks5AddressData?> ParseAsync(Stream stream, CancellationToken ct)
+        {
+            var addr = new Socks5AddressData();
+            var typeByte = new byte[1];
+            try
+            {
+                if (await stream.ReadAsync(typeByte.AsMemory(0, 1), ct).ConfigureAwait(false) < 1)
+                {
+                    return null;
+                }
+                addr.AddressType = typeByte[0];
+                switch (addr.AddressType)
+                {
+                    case AddrTypeIPv4:
+                        var ipv4Bytes = new byte[4];
+                        if (await stream.ReadAsync(ipv4Bytes.AsMemory(0, 4), ct).ConfigureAwait(false) < 4)
+                        {
+                            return null;
+                        }
+                        addr.Host = new IPAddress(ipv4Bytes).ToString();
+                        break;
+                    case AddrTypeDomain:
+                        var lenByte = new byte[1];
+                        if (await stream.ReadAsync(lenByte.AsMemory(0, 1), ct).ConfigureAwait(false) < 1)
+                        {
+                            return null;
+                        }
+                        if (lenByte[0] == 0)
+                        {
+                            addr.Host = string.Empty;
+                        }
+                        else
+                        {
+                            var domainBytes = new byte[lenByte[0]];
+                            if (await stream.ReadAsync(domainBytes.AsMemory(0, domainBytes.Length), ct).ConfigureAwait(false) < domainBytes.Length)
+                            {
+                                return null;
+                            }
+                            addr.Host = Encoding.ASCII.GetString(domainBytes);
+                        }
+                        break;
+                    case AddrTypeIPv6:
+                        var ipv6Bytes = new byte[16];
+                        if (await stream.ReadAsync(ipv6Bytes.AsMemory(0, 16), ct).ConfigureAwait(false) < 16)
+                        {
+                            return null;
+                        }
+                        addr.Host = new IPAddress(ipv6Bytes).ToString();
+                        break;
+                    default:
+                        return null;
+                }
+                var portBytes = new byte[2];
+                if (await stream.ReadAsync(portBytes.AsMemory(0, 2), ct).ConfigureAwait(false) < 2)
+                {
+                    return null;
+                }
+                addr.Port = BinaryPrimitives.ReadUInt16BigEndian(portBytes);
+                return addr;
+            }
+            catch (Exception ex) when (ex is IOException or ObjectDisposedException)
+            {
+                return null;
+            }
+        }
+    }
+    #endregion SOCKS5 Address Handling
+}

v2rayN/ServiceLib/Services/Udp/StunService.cs

@@ -0,0 +1,67 @@
+using System.Security.Cryptography;
+
+namespace ServiceLib.Services.Udp;
+public class StunService : UdpService
+{
+    private const int StunDefaultPort = 3478;
+    private const string StunDefaultServer = "stun.voztovoice.org";
+    private byte[] _transactionId;
+
+    protected override byte[] BuildUdpRequestPacket()
+    {
+        // STUN Binding Request
+        var packet = new byte[20];
+
+        // Message Type: Binding Request (0x0001)
+        packet[0] = 0x00;
+        packet[1] = 0x01;
+
+        // Message Length: 0 (no attributes)
+        packet[2] = 0x00;
+        packet[3] = 0x00;
+
+        // Magic Cookie: 0x2112A442
+        packet[4] = 0x21;
+        packet[5] = 0x12;
+        packet[6] = 0xA4;
+        packet[7] = 0x42;
+
+        // Transaction ID: 96 bits (12 bytes) random
+        _transactionId = new byte[12];
+        RandomNumberGenerator.Fill(_transactionId);
+        Array.Copy(_transactionId, 0, packet, 8, 12);
+
+        return packet;
+    }
+
+    protected override bool VerifyAndExtractUdpResponse(byte[] stunResponseBytes)
+    {
+        if (stunResponseBytes == null || stunResponseBytes.Length < 20)
+        {
+            return false;
+        }
+
+        // Message Type: Binding Success Response (0x0101) 或 Binding Error Response (0x0111)
+        if (stunResponseBytes.Length >= 2)
+        {
+            var messageType = (stunResponseBytes[0] << 8) | stunResponseBytes[1];
+            // 0x0101 = Success Response, 0x0111 = Error Response
+            if (messageType is 0x0101 or 0x0111)
+            {
+                return true;
+            }
+        }
+
+        return true;
+    }
+
+    protected override ushort GetDefaultTargetPort()
+    {
+        return StunDefaultPort;
+    }
+
+    protected override string GetDefaultTargetHost()
+    {
+        return StunDefaultServer;
+    }
+}

v2rayN/ServiceLib/Services/Udp/UdpService.cs

@@ -0,0 +1,123 @@
+using System.Diagnostics;
+
+namespace ServiceLib.Services.Udp;
+public abstract class UdpService
+{
+    protected abstract byte[] BuildUdpRequestPacket();
+    protected abstract bool VerifyAndExtractUdpResponse(byte[] udpResponseBytes);
+    protected abstract ushort GetDefaultTargetPort();
+    protected abstract string GetDefaultTargetHost();
+
+    private (string host, ushort port) ParseHostAndPort(string targetServerHost)
+    {
+        if (targetServerHost.IsNullOrEmpty())
+        {
+            return (GetDefaultTargetHost(), GetDefaultTargetPort());
+        }
+
+        // Handle IPv6 format: [::1]:port or [2001:db8::1]:port
+        if (targetServerHost.StartsWith("["))
+        {
+            var closeBracketIndex = targetServerHost.IndexOf(']');
+            if (closeBracketIndex > 0)
+            {
+                var host = targetServerHost.Substring(1, closeBracketIndex - 1);
+                if (closeBracketIndex < targetServerHost.Length - 1 && targetServerHost[closeBracketIndex + 1] == ':')
+                {
+                    var portStr = targetServerHost.Substring(closeBracketIndex + 2);
+                    if (ushort.TryParse(portStr, out var port))
+                    {
+                        return (host, port);
+                    }
+                }
+                return (host, GetDefaultTargetPort());
+            }
+        }
+
+        // Handle IPv4 or domain format: 1.1.1.1:53 or exam.com:333
+        var lastColonIndex = targetServerHost.LastIndexOf(':');
+        if (lastColonIndex > 0)
+        {
+            var host = targetServerHost.Substring(0, lastColonIndex);
+            var portStr = targetServerHost.Substring(lastColonIndex + 1);
+            if (ushort.TryParse(portStr, out var port))
+            {
+                return (host, port);
+            }
+        }
+
+        // No port specified, use default
+        return (targetServerHost, GetDefaultTargetPort());
+    }
+
+    public async Task<TimeSpan> SendUdpRequestAsync(string targetServerHost, int socks5Port, TimeSpan operationTimeout)
+    {
+        using var cts = new CancellationTokenSource(operationTimeout);
+        var cancellationToken = cts.Token;
+        var udpRequestPacket = BuildUdpRequestPacket();
+        if (udpRequestPacket == null || udpRequestPacket.Length == 0)
+        {
+            throw new InvalidOperationException("Failed to build UDP request packet.");
+        }
+        using var channel = new Socks5UdpChannel(Global.Loopback, socks5Port);
+        try
+        {
+            if (!await channel.EstablishUdpAssociationAsync(cancellationToken).ConfigureAwait(false))
+            {
+                throw new Exception("Failed to establish UDP association with SOCKS5 proxy.");
+            }
+
+            var (targetHost, targetPort) = ParseHostAndPort(targetServerHost);
+
+            byte[] udpReceiveResult = null;
+
+            // Get minimum round trip time from two attempts
+            var roundTripTime = TimeSpan.MaxValue;
+
+            for (var attempt = 0; attempt < 2; attempt++)
+            {
+                try
+                {
+                    var stopwatch = new Stopwatch();
+                    stopwatch.Start();
+                    await channel.SendAsync(targetHost, targetPort, udpRequestPacket).ConfigureAwait(false);
+                    var (_, receiveResult) = await channel.ReceiveAsync(cancellationToken).ConfigureAwait(false);
+                    stopwatch.Stop();
+
+                    udpReceiveResult = receiveResult;
+
+                    var currentRoundTripTime = stopwatch.Elapsed;
+                    if (currentRoundTripTime < roundTripTime)
+                    {
+                        roundTripTime = currentRoundTripTime;
+                    }
+                }
+                catch
+                {
+                    if (attempt == 1 && roundTripTime == TimeSpan.MaxValue)
+                    {
+                        throw;
+                    }
+                }
+            }
+
+            if ((udpReceiveResult?.Length ?? 0) < 4 + 1 + 4 + 2)
+            {
+                throw new Exception("Received NTP response is too short.");
+            }
+
+            if (VerifyAndExtractUdpResponse(udpReceiveResult))
+            {
+                return roundTripTime;
+            }
+            else
+            {
+                throw new Exception("Failed to verify and extract UDP response.");
+            }
+        }
+        catch
+        {
+            throw;
+        }
+    }
+}

v2rayN/ServiceLib/ViewModels/OptionSettingViewModel.cs

@@ -63,6 +63,8 @@ public class OptionSettingViewModel : MyReactiveObject
     [Reactive] public int SpeedTestTimeout { get; set; }
     [Reactive] public string SpeedTestUrl { get; set; }
     [Reactive] public string SpeedPingTestUrl { get; set; }
+    [Reactive] public string UdpTestType { get; set; }
+    [Reactive] public string UdpTestUrl { get; set; }
     [Reactive] public int MixedConcurrencyCount { get; set; }
     [Reactive] public bool EnableHWA { get; set; }
     [Reactive] public string SubConvertUrl { get; set; }
@@ -182,6 +184,8 @@ public class OptionSettingViewModel : MyReactiveObject
         SpeedTestUrl = _config.SpeedTestItem.SpeedTestUrl;
         MixedConcurrencyCount = _config.SpeedTestItem.MixedConcurrencyCount;
         SpeedPingTestUrl = _config.SpeedTestItem.SpeedPingTestUrl;
+        UdpTestType = _config.SpeedTestItem.UdpTestType.ToString();
+        UdpTestUrl = _config.SpeedTestItem.UdpTestUrl;
         EnableHWA = _config.GuiItem.EnableHWA;
         SubConvertUrl = _config.ConstItem.SubConvertUrl;
         MainGirdOrientation = (int)_config.UiItem.MainGirdOrientation;
@@ -342,6 +346,8 @@ public class OptionSettingViewModel : MyReactiveObject
         _config.SpeedTestItem.MixedConcurrencyCount = MixedConcurrencyCount;
         _config.SpeedTestItem.SpeedTestUrl = SpeedTestUrl;
         _config.SpeedTestItem.SpeedPingTestUrl = SpeedPingTestUrl;
+        _config.SpeedTestItem.UdpTestType = (EUdpTest)Enum.Parse(typeof(EUdpTest), UdpTestType);
+        _config.SpeedTestItem.UdpTestUrl = UdpTestUrl;
         _config.GuiItem.EnableHWA = EnableHWA;
         _config.ConstItem.SubConvertUrl = SubConvertUrl;
         _config.UiItem.MainGirdOrientation = (EGirdOrientation)MainGirdOrientation;

v2rayN/ServiceLib/ViewModels/ProfilesViewModel.cs

@@ -72,6 +72,7 @@ public class ProfilesViewModel : MyReactiveObject
 
     public ReactiveCommand<Unit, Unit> TcpingServerCmd { get; }
     public ReactiveCommand<Unit, Unit> RealPingServerCmd { get; }
+    public ReactiveCommand<Unit, Unit> UdpTestServerCmd { get; }
     public ReactiveCommand<Unit, Unit> SpeedServerCmd { get; }
     public ReactiveCommand<Unit, Unit> SortServerResultCmd { get; }
     public ReactiveCommand<Unit, Unit> RemoveInvalidServerResultCmd { get; }
@@ -200,6 +201,10 @@ public class ProfilesViewModel : MyReactiveObject
         {
             await ServerSpeedtest(ESpeedActionType.Realping);
         }, canEditRemove);
+        UdpTestServerCmd = ReactiveCommand.CreateFromTask(async () =>
+        {
+            await ServerSpeedtest(ESpeedActionType.UdpTest);
+        }, canEditRemove);
         SpeedServerCmd = ReactiveCommand.CreateFromTask(async () =>
         {
             await ServerSpeedtest(ESpeedActionType.Speedtest);

v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml

@@ -340,7 +340,7 @@
                     <Grid
                         Margin="{StaticResource Margin4}"
                         ColumnDefinitions="Auto,Auto,*"
-                        RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto">
+                        RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto">
 
                         <TextBlock
                             x:Name="tbAutoRun"
@@ -583,56 +583,83 @@
                             Grid.Column="0"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
+                            Text="{x:Static resx:ResUI.TbSettingsUdpTestType}" />
+                        <ComboBox
+                            x:Name="cmbUdpTestType"
+                            Grid.Row="20"
+                            Grid.Column="1"
+                            Width="200"
+                            Margin="{StaticResource Margin4}" />
+
+                        <TextBlock
+                            Grid.Row="21"
+                            Grid.Column="0"
+                            Margin="{StaticResource Margin4}"
+                            VerticalAlignment="Center"
+                            Text="{x:Static resx:ResUI.TbSettingsUdpTestUrl}" />
+                        <TextBox
+                            x:Name="txtUdpTestUrl"
+                            Grid.Row="21"
+                            Grid.Column="1"
+                            Width="300"
+                            Margin="{StaticResource Margin4}"
+                            HorizontalAlignment="Left" />
+
+                        <TextBlock
+                            Grid.Row="22"
+                            Grid.Column="0"
+                            Margin="{StaticResource Margin4}"
+                            VerticalAlignment="Center"
                             Text="{x:Static resx:ResUI.TbSettingsIPAPIUrl}" />
                         <ComboBox
                             x:Name="cmbIPAPIUrl"
-                            Grid.Row="20"
+                            Grid.Row="22"
                             Grid.Column="1"
                             Width="300"
                             Margin="{StaticResource Margin4}" />
 
                         <TextBlock
-                            Grid.Row="21"
+                            Grid.Row="23"
                             Grid.Column="0"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
                             Text="{x:Static resx:ResUI.TbSettingsSubConvert}" />
                         <ComboBox
                             x:Name="cmbSubConvertUrl"
-                            Grid.Row="21"
+                            Grid.Row="23"
                             Grid.Column="1"
                             Width="300"
                             Margin="{StaticResource Margin4}"
                             IsEditable="True" />
 
                         <TextBlock
-                            Grid.Row="22"
+                            Grid.Row="24"
                             Grid.Column="0"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
                             Text="{x:Static resx:ResUI.TbSettingsMainGirdOrientation}" />
                         <ComboBox
                             x:Name="cmbMainGirdOrientation"
-                            Grid.Row="22"
+                            Grid.Row="24"
                             Grid.Column="1"
                             Width="200"
                             Margin="{StaticResource Margin4}" />
 
                         <TextBlock
-                            Grid.Row="23"
+                            Grid.Row="25"
                             Grid.Column="0"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
                             Text="{x:Static resx:ResUI.TbSettingsGeoFilesSource}" />
                         <ComboBox
                             x:Name="cmbGetFilesSourceUrl"
-                            Grid.Row="23"
+                            Grid.Row="25"
                             Grid.Column="1"
                             Width="300"
                             Margin="{StaticResource Margin4}"
                             IsEditable="True" />
                         <TextBlock
-                            Grid.Row="23"
+                            Grid.Row="25"
                             Grid.Column="2"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
@@ -640,20 +667,20 @@
                             TextWrapping="Wrap" />
 
                         <TextBlock
-                            Grid.Row="24"
+                            Grid.Row="26"
                             Grid.Column="0"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
                             Text="{x:Static resx:ResUI.TbSettingsSrsFilesSource}" />
                         <ComboBox
                             x:Name="cmbSrsFilesSourceUrl"
-                            Grid.Row="24"
+                            Grid.Row="26"
                             Grid.Column="1"
                             Width="300"
                             Margin="{StaticResource Margin4}"
                             IsEditable="True" />
                         <TextBlock
-                            Grid.Row="24"
+                            Grid.Row="26"
                             Grid.Column="2"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
@@ -661,20 +688,20 @@
                             TextWrapping="Wrap" />
 
                         <TextBlock
-                            Grid.Row="25"
+                            Grid.Row="27"
                             Grid.Column="0"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
                             Text="{x:Static resx:ResUI.TbSettingsRoutingRulesSource}" />
                         <ComboBox
                             x:Name="cmbRoutingRulesSourceUrl"
-                            Grid.Row="25"
+                            Grid.Row="27"
                             Grid.Column="1"
                             Width="300"
                             Margin="{StaticResource Margin4}"
                             IsEditable="True" />
                         <TextBlock
-                            Grid.Row="25"
+                            Grid.Row="27"
                             Grid.Column="2"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"

v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml.cs

@@ -47,6 +47,7 @@ public partial class OptionSettingWindow : WindowBase<OptionSettingViewModel>
         cmbSpeedTestTimeout.ItemsSource = Enumerable.Range(2, 5).Select(i => i * 5).ToList();
         cmbSpeedTestUrl.ItemsSource = Global.SpeedTestUrls;
         cmbSpeedPingTestUrl.ItemsSource = Global.SpeedPingTestUrls;
+        cmbUdpTestType.ItemsSource = Utils.GetEnumNames<EUdpTest>();
         cmbSubConvertUrl.ItemsSource = Global.SubConvertUrls;
         cmbGetFilesSourceUrl.ItemsSource = Global.GeoFilesSources;
         cmbSrsFilesSourceUrl.ItemsSource = Global.SingboxRulesetSources;
@@ -95,6 +96,8 @@ public partial class OptionSettingWindow : WindowBase<OptionSettingViewModel>
             this.Bind(ViewModel, vm => vm.SpeedTestTimeout, v => v.cmbSpeedTestTimeout.SelectedValue).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.SpeedTestUrl, v => v.cmbSpeedTestUrl.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.SpeedPingTestUrl, v => v.cmbSpeedPingTestUrl.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.UdpTestType, v => v.cmbUdpTestType.SelectedValue).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.UdpTestUrl, v => v.txtUdpTestUrl.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.MixedConcurrencyCount, v => v.cmbMixedConcurrencyCount.SelectedValue).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.SubConvertUrl, v => v.cmbSubConvertUrl.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.MainGirdOrientation, v => v.cmbMainGirdOrientation.SelectedIndex).DisposeWith(disposables);

v2rayN/v2rayN.Desktop/Views/ProfilesView.axaml

@@ -112,6 +112,7 @@
                         <MenuItem x:Name="menuMixedTestServer" Header="{x:Static resx:ResUI.menuMixedTestServer}" />
                         <MenuItem x:Name="menuTcpingServer" Header="{x:Static resx:ResUI.menuTcpingServer}" />
                         <MenuItem x:Name="menuRealPingServer" Header="{x:Static resx:ResUI.menuRealPingServer}" />
+                        <MenuItem x:Name="menuUdpTestServer" Header="{x:Static resx:ResUI.menuUdpTestServer}" />
                         <MenuItem x:Name="menuSpeedServer" Header="{x:Static resx:ResUI.menuSpeedServer}" />
                         <MenuItem Header="{x:Static resx:ResUI.menuTestServerResult}">
                             <MenuItem x:Name="menuSortServerResult" Header="{x:Static resx:ResUI.menuSortServerResult}" />

v2rayN/v2rayN.Desktop/Views/ProfilesView.axaml.cs

@@ -86,6 +86,7 @@ public partial class ProfilesView : ReactiveUserControl<ProfilesViewModel>
             this.BindCommand(ViewModel, vm => vm.MixedTestServerCmd, v => v.menuMixedTestServer).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.TcpingServerCmd, v => v.menuTcpingServer).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.RealPingServerCmd, v => v.menuRealPingServer).DisposeWith(disposables);
+            this.BindCommand(ViewModel, vm => vm.UdpTestServerCmd, v => v.menuUdpTestServer).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.SpeedServerCmd, v => v.menuSpeedServer).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.SortServerResultCmd, v => v.menuSortServerResult).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.RemoveInvalidServerResultCmd, v => v.menuRemoveInvalidServerResult).DisposeWith(disposables);

v2rayN/v2rayN/Views/OptionSettingWindow.xaml

@@ -552,6 +552,8 @@
                             <RowDefinition Height="Auto" />
                             <RowDefinition Height="Auto" />
                             <RowDefinition Height="Auto" />
+                            <RowDefinition Height="Auto" />
+                            <RowDefinition Height="Auto" />
                         </Grid.RowDefinitions>
                         <Grid.ColumnDefinitions>
                             <ColumnDefinition Width="Auto" />
@@ -845,14 +847,13 @@
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
                             Style="{StaticResource ToolbarTextBlock}"
-                            Text="{x:Static resx:ResUI.TbSettingsIPAPIUrl}" />
+                            Text="{x:Static resx:ResUI.TbSettingsUdpTestType}" />
                         <ComboBox
-                            x:Name="cmbIPAPIUrl"
+                            x:Name="cmbUdpTestType"
                             Grid.Row="20"
                             Grid.Column="1"
-                            Width="300"
+                            Width="200"
                             Margin="{StaticResource Margin8}"
-                            IsEditable="True"
                             Style="{StaticResource DefComboBox}" />
 
                         <TextBlock
@@ -861,10 +862,42 @@
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
                             Style="{StaticResource ToolbarTextBlock}"
+                            Text="{x:Static resx:ResUI.TbSettingsUdpTestUrl}" />
+                        <TextBox
+                            x:Name="txtUdpTestUrl"
+                            Grid.Row="21"
+                            Grid.Column="1"
+                            Width="300"
+                            Margin="{StaticResource Margin8}"
+                            HorizontalAlignment="Left"
+                            Style="{StaticResource DefTextBox}" />
+
+                        <TextBlock
+                            Grid.Row="22"
+                            Grid.Column="0"
+                            Margin="{StaticResource Margin8}"
+                            VerticalAlignment="Center"
+                            Style="{StaticResource ToolbarTextBlock}"
+                            Text="{x:Static resx:ResUI.TbSettingsIPAPIUrl}" />
+                        <ComboBox
+                            x:Name="cmbIPAPIUrl"
+                            Grid.Row="22"
+                            Grid.Column="1"
+                            Width="300"
+                            Margin="{StaticResource Margin8}"
+                            IsEditable="True"
+                            Style="{StaticResource DefComboBox}" />
+
+                        <TextBlock
+                            Grid.Row="23"
+                            Grid.Column="0"
+                            Margin="{StaticResource Margin8}"
+                            VerticalAlignment="Center"
+                            Style="{StaticResource ToolbarTextBlock}"
                             Text="{x:Static resx:ResUI.TbSettingsSubConvert}" />
                         <ComboBox
                             x:Name="cmbSubConvertUrl"
-                            Grid.Row="21"
+                            Grid.Row="23"
                             Grid.Column="1"
                             Width="300"
                             Margin="{StaticResource Margin8}"
@@ -873,7 +906,7 @@
                             Style="{StaticResource DefComboBox}" />
 
                         <TextBlock
-                            Grid.Row="22"
+                            Grid.Row="24"
                             Grid.Column="0"
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
@@ -881,14 +914,14 @@
                             Text="{x:Static resx:ResUI.TbSettingsMainGirdOrientation}" />
                         <ComboBox
                             x:Name="cmbMainGirdOrientation"
-                            Grid.Row="22"
+                            Grid.Row="24"
                             Grid.Column="1"
                             Width="200"
                             Margin="{StaticResource Margin8}"
                             Style="{StaticResource DefComboBox}" />
 
                         <TextBlock
-                            Grid.Row="23"
+                            Grid.Row="25"
                             Grid.Column="0"
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
@@ -896,14 +929,14 @@
                             Text="{x:Static resx:ResUI.TbSettingsGeoFilesSource}" />
                         <ComboBox
                             x:Name="cmbGetFilesSourceUrl"
-                            Grid.Row="23"
+                            Grid.Row="25"
                             Grid.Column="1"
                             Width="300"
                             Margin="{StaticResource Margin8}"
                             IsEditable="True"
                             Style="{StaticResource DefComboBox}" />
                         <TextBlock
-                            Grid.Row="23"
+                            Grid.Row="25"
                             Grid.Column="2"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
@@ -912,7 +945,7 @@
                             TextWrapping="Wrap" />
 
                         <TextBlock
-                            Grid.Row="24"
+                            Grid.Row="26"
                             Grid.Column="0"
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
@@ -920,14 +953,14 @@
                             Text="{x:Static resx:ResUI.TbSettingsSrsFilesSource}" />
                         <ComboBox
                             x:Name="cmbSrsFilesSourceUrl"
-                            Grid.Row="24"
+                            Grid.Row="26"
                             Grid.Column="1"
                             Width="300"
                             Margin="{StaticResource Margin8}"
                             IsEditable="True"
                             Style="{StaticResource DefComboBox}" />
                         <TextBlock
-                            Grid.Row="24"
+                            Grid.Row="26"
                             Grid.Column="2"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
@@ -936,7 +969,7 @@
                             TextWrapping="Wrap" />
 
                         <TextBlock
-                            Grid.Row="25"
+                            Grid.Row="27"
                             Grid.Column="0"
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
@@ -944,14 +977,14 @@
                             Text="{x:Static resx:ResUI.TbSettingsRoutingRulesSource}" />
                         <ComboBox
                             x:Name="cmbRoutingRulesSourceUrl"
-                            Grid.Row="25"
+                            Grid.Row="27"
                             Grid.Column="1"
                             Width="300"
                             Margin="{StaticResource Margin8}"
                             IsEditable="True"
                             Style="{StaticResource DefComboBox}" />
                         <TextBlock
-                            Grid.Row="25"
+                            Grid.Row="27"
                             Grid.Column="2"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"

v2rayN/v2rayN/Views/OptionSettingWindow.xaml.cs

@@ -47,6 +47,7 @@ public partial class OptionSettingWindow
         cmbSpeedTestTimeout.ItemsSource = Enumerable.Range(2, 5).Select(i => i * 5).ToList();
         cmbSpeedTestUrl.ItemsSource = Global.SpeedTestUrls;
         cmbSpeedPingTestUrl.ItemsSource = Global.SpeedPingTestUrls;
+        cmbUdpTestType.ItemsSource = Utils.GetEnumNames<EUdpTest>();
         cmbSubConvertUrl.ItemsSource = Global.SubConvertUrls;
         cmbGetFilesSourceUrl.ItemsSource = Global.GeoFilesSources;
         cmbSrsFilesSourceUrl.ItemsSource = Global.SingboxRulesetSources;
@@ -104,6 +105,8 @@ public partial class OptionSettingWindow
             this.Bind(ViewModel, vm => vm.SpeedTestTimeout, v => v.cmbSpeedTestTimeout.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.SpeedTestUrl, v => v.cmbSpeedTestUrl.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.SpeedPingTestUrl, v => v.cmbSpeedPingTestUrl.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.UdpTestType, v => v.cmbUdpTestType.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.UdpTestUrl, v => v.txtUdpTestUrl.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.MixedConcurrencyCount, v => v.cmbMixedConcurrencyCount.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.EnableHWA, v => v.togEnableHWA.IsChecked).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.SubConvertUrl, v => v.cmbSubConvertUrl.Text).DisposeWith(disposables);

v2rayN/v2rayN/Views/ProfilesView.xaml

@@ -165,6 +165,10 @@
                             x:Name="menuRealPingServer"
                             Height="{StaticResource MenuItemHeight}"
                             Header="{x:Static resx:ResUI.menuRealPingServer}" />
+                        <MenuItem
+                            x:Name="menuUdpTestServer"
+                            Height="{StaticResource MenuItemHeight}"
+                            Header="{x:Static resx:ResUI.menuUdpTestServer}" />
                         <MenuItem
                             x:Name="menuSpeedServer"
                             Height="{StaticResource MenuItemHeight}"

v2rayN/v2rayN/Views/ProfilesView.xaml.cs

@@ -80,6 +80,7 @@ public partial class ProfilesView
             this.BindCommand(ViewModel, vm => vm.MixedTestServerCmd, v => v.menuMixedTestServer).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.TcpingServerCmd, v => v.menuTcpingServer).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.RealPingServerCmd, v => v.menuRealPingServer).DisposeWith(disposables);
+            this.BindCommand(ViewModel, vm => vm.UdpTestServerCmd, v => v.menuUdpTestServer).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.SpeedServerCmd, v => v.menuSpeedServer).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.SortServerResultCmd, v => v.menuSortServerResult).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.RemoveInvalidServerResultCmd, v => v.menuRemoveInvalidServerResult).DisposeWith(disposables);