refactor: DNS part

NatTypeTester-Console/Program.cs

@@ -3,41 +3,32 @@ using STUN;
 using STUN.Client;
 using System;
 using System.Net;
-using System.Threading.Tasks;
 
-namespace NatTypeTester
+//stun.qq.com:3478 0.0.0.0:0
+var server = @"stun.syncthing.net";
+ushort port = 3478;
+var local = new IPEndPoint(IPAddress.Any, 0);
+
+if (args.Length > 0 && StunServer.TryParse(args[0], out var stun))
 {
-	internal static class Program
-	{
-		/// <summary>
-		/// stun.qq.com:3478 0.0.0.0:0
-		/// </summary>
-		private static async Task Main(string[] args)
-		{
-			var server = @"stun.syncthing.net";
-			ushort port = 3478;
-			var local = new IPEndPoint(IPAddress.Any, 0);
+	server = stun.Hostname;
+	port = stun.Port;
+}
 
-			if (args.Length > 0 && StunServer.TryParse(args[0], out var stun))
-			{
-				server = stun.Hostname;
-				port = stun.Port;
-			}
-			if (args.Length > 1)
-			{
-				IPEndPoint.TryParse(args[2], out local);
-			}
+if (args.Length > 1)
+{
+	IPEndPoint.TryParse(args[2], out local);
+}
 
-			using var client = new StunClient5389UDP(new DefaultDnsClient(), server, port, local);
-			await client.QueryAsync();
-			var res = client.Status;
+var dnsClient = new DefaultDnsClient();
+var ip = await dnsClient.QueryAsync(server);
+using var client = new StunClient5389UDP(ip, port, local);
+await client.QueryAsync();
+var res = client.Status;
 
-			Console.WriteLine($@"Other address is {res.OtherEndPoint}");
-			Console.WriteLine($@"Binding test: {res.BindingTestResult}");
-			Console.WriteLine($@"Local address: {res.LocalEndPoint}");
-			Console.WriteLine($@"Mapped address: {res.PublicEndPoint}");
-			Console.WriteLine($@"Nat mapping behavior: {res.MappingBehavior}");
-			Console.WriteLine($@"Nat filtering behavior: {res.FilteringBehavior}");
-		}
-	}
-}
+Console.WriteLine($@"Other address is {res.OtherEndPoint}");
+Console.WriteLine($@"Binding test: {res.BindingTestResult}");
+Console.WriteLine($@"Local address: {res.LocalEndPoint}");
+Console.WriteLine($@"Mapped address: {res.PublicEndPoint}");
+Console.WriteLine($@"Nat mapping behavior: {res.MappingBehavior}");
+Console.WriteLine($@"Nat filtering behavior: {res.FilteringBehavior}");

NatTypeTester.ViewModels/NatTypeTester.ViewModels.csproj

@@ -3,6 +3,7 @@
   <Import Project="..\common.props" />
 
   <ItemGroup>
+    <PackageReference Include="Dns.Net.Abstractions" Version="0.1.0" />
     <PackageReference Include="ReactiveUI" Version="15.1.1" />
     <PackageReference Include="Volo.Abp.Core" Version="4.4.0" />
   </ItemGroup>

NatTypeTester.ViewModels/RFC3489ViewModel.cs

@@ -47,7 +47,8 @@ namespace NatTypeTester.ViewModels
 					Config.ProxyUser, Config.ProxyPassword
 			);
 
-			using var client = new StunClient3489(DnsClient, server.Hostname, server.Port, Result3489.LocalEndPoint, proxy);
+			var ip = await DnsClient.QueryAsync(server.Hostname, token);
+			using var client = new StunClient3489(ip, server.Port, Result3489.LocalEndPoint, proxy);
 
 			Result3489 = client.Status;
 			using (Observable.Interval(TimeSpan.FromSeconds(0.1))

NatTypeTester.ViewModels/RFC5780ViewModel.cs

@@ -47,7 +47,8 @@ namespace NatTypeTester.ViewModels
 					Config.ProxyUser, Config.ProxyPassword
 			);
 
-			using var client = new StunClient5389UDP(DnsClient, server.Hostname, server.Port, Result5389.LocalEndPoint, proxy);
+			var ip = await DnsClient.QueryAsync(server.Hostname, token);
+			using var client = new StunClient5389UDP(ip, server.Port, Result5389.LocalEndPoint, proxy);
 
 			Result5389 = client.Status;
 			using (Observable.Interval(TimeSpan.FromSeconds(0.1))

STUN/Client/StunClient3489.cs

@@ -1,4 +1,4 @@
-using Dns.Net.Abstractions;
+using Microsoft;
 using STUN.Enums;
 using STUN.Messages;
 using STUN.Proxy;
@@ -36,23 +36,14 @@ namespace STUN.Client
 
 		public ClassicStunResult Status { get; } = new();
 
-		public StunClient3489(IDnsClient dnsQuery, string server, ushort port = 3478, IPEndPoint? local = null, IUdpProxy? proxy = null)
+		public StunClient3489(IPAddress server, ushort port = 3478, IPEndPoint? local = null, IUdpProxy? proxy = null)
 		{
-			Proxy = proxy ?? new NoneUdpProxy(local);
-
-			if (string.IsNullOrEmpty(server))
-			{
-				throw new ArgumentException(@"Please specify STUN server !");
-			}
+			Requires.NotNull(server, nameof(server));
+			Requires.Argument(port > 0, nameof(port), @"Port value must be >= 1 !");
 
-			if (port < 1)
-			{
-				throw new ArgumentException(@"Port value must be >= 1 !");
-			}
-
-			var ip = dnsQuery.Query(server);
+			Proxy = proxy ?? new NoneUdpProxy(local);
 
-			Server = ip;
+			Server = server;
 			Port = port;
 
 			Timeout = TimeSpan.FromSeconds(1.6);

STUN/Client/StunClient5389UDP.cs

@@ -1,4 +1,3 @@
-using Dns.Net.Abstractions;
 using STUN.Enums;
 using STUN.Messages;
 using STUN.Proxy;
@@ -19,8 +18,8 @@ namespace STUN.Client
 	{
 		public new StunResult5389 Status { get; } = new();
 
-		public StunClient5389UDP(IDnsClient dnsQuery, string server, ushort port = 3478, IPEndPoint? local = null, IUdpProxy? proxy = null)
-		: base(dnsQuery, server, port, local, proxy)
+		public StunClient5389UDP(IPAddress server, ushort port = 3478, IPEndPoint? local = null, IUdpProxy? proxy = null)
+		: base(server, port, local, proxy)
 		{
 			Timeout = TimeSpan.FromSeconds(3);
 			Status.LocalEndPoint = local;

STUN/STUN.csproj

@@ -16,7 +16,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Dns.Net.Abstractions" Version="0.1.0" />
     <PackageReference Include="Microsoft.VisualStudio.Validation" Version="16.10.34" />
   </ItemGroup>
 

UnitTest/UnitTest.cs

@@ -1,3 +1,4 @@
+using Dns.Net.Abstractions;
 using Dns.Net.Clients;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using STUN.Client;
@@ -12,10 +13,13 @@ namespace UnitTest
 	[TestClass]
 	public class UnitTest
 	{
+		private readonly IDnsClient dnsClient = new DefaultDnsClient();
+
 		[TestMethod]
 		public async Task BindingTest()
 		{
-			using var client = new StunClient5389UDP(new DefaultDnsClient(), @"stun.syncthing.net", 3478, new IPEndPoint(IPAddress.Any, 0));
+			var server = await dnsClient.QueryAsync(@"stun.syncthing.net");
+			using var client = new StunClient5389UDP(server, 3478, new IPEndPoint(IPAddress.Any, 0));
 			await client.BindingTestAsync();
 			var result = client.Status;
 
@@ -31,7 +35,8 @@ namespace UnitTest
 		[TestMethod]
 		public async Task MappingBehaviorTest()
 		{
-			using var client = new StunClient5389UDP(new DefaultDnsClient(), @"stun.syncthing.net", 3478, new IPEndPoint(IPAddress.Any, 0));
+			var server = await dnsClient.QueryAsync(@"stun.syncthing.net");
+			using var client = new StunClient5389UDP(server, 3478, new IPEndPoint(IPAddress.Any, 0));
 			await client.MappingBehaviorTestAsync();
 			var result = client.Status;
 
@@ -52,7 +57,8 @@ namespace UnitTest
 		[TestMethod]
 		public async Task FilteringBehaviorTest()
 		{
-			using var client = new StunClient5389UDP(new DefaultDnsClient(), @"stun.syncthing.net", 3478, new IPEndPoint(IPAddress.Any, 0));
+			var server = await dnsClient.QueryAsync(@"stun.syncthing.net");
+			using var client = new StunClient5389UDP(server, 3478, new IPEndPoint(IPAddress.Any, 0));
 			await client.FilteringBehaviorTestAsync();
 			var result = client.Status;
 
@@ -72,7 +78,8 @@ namespace UnitTest
 		[TestMethod]
 		public async Task CombiningTest()
 		{
-			using var client = new StunClient5389UDP(new DefaultDnsClient(), @"stun.syncthing.net", 3478, new IPEndPoint(IPAddress.Any, 0));
+			var server = await dnsClient.QueryAsync(@"stun.syncthing.net");
+			using var client = new StunClient5389UDP(server, 3478, new IPEndPoint(IPAddress.Any, 0));
 			await client.QueryAsync();
 			var result = client.Status;
 
@@ -98,7 +105,8 @@ namespace UnitTest
 		public async Task ProxyTest()
 		{
 			using var proxy = ProxyFactory.CreateProxy(ProxyType.Socks5, IPEndPoint.Parse(@"0.0.0.0:0"), IPEndPoint.Parse(@"127.0.0.1:10000"));
-			using var client = new StunClient5389UDP(new DefaultDnsClient(), @"stun.syncthing.net", 3478, new IPEndPoint(IPAddress.Any, 0), proxy);
+			var server = await dnsClient.QueryAsync(@"stun.syncthing.net");
+			using var client = new StunClient5389UDP(server, 3478, new IPEndPoint(IPAddress.Any, 0));
 			await client.QueryAsync();
 			var result = client.Status;