fixed compilation errors

.gitignore

@@ -20,4 +20,12 @@
 *.user
 
 #backups
-.old*/
+.old*/
+
+#secrets
+*.pem
+*.key
+*.csr
+*.crt
+*.pfx
+*.config.json

Meum.Client.CLI/Meum.Client.CLI.csproj

@@ -1,14 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <Version>1.0.0</Version>
+        <Version>0.0.1</Version>
+        <TargetFramework>net9.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>disable</ImplicitUsings>
     </PropertyGroup>
 
     <ItemGroup>
         <ProjectReference Include="..\Meum.Client\Meum.Client.csproj" />
     </ItemGroup>
 
-    <ItemGroup>
-      <PackageReference Include="DTLib" Version="1.6.0" />
-    </ItemGroup>
 </Project>

Meum.Client.CLI/Program.cs

@@ -8,6 +8,7 @@ using System.Reflection;
 using DTLib.Console;
 using DTLib.Demystifier;
 using DTLib.Extensions;
+using DTLib.Logging;
 
 namespace Meum.Client.CLI;
 
@@ -33,51 +34,70 @@ class Program
     {
         Console.OutputEncoding = StringConverter.UTF8;
         Console.InputEncoding = StringConverter.UTF8;
-        ColoredConsole.ResetColor();
+        ColoredConsole.Clear();
-        var v = Assembly.GetExecutingAssembly().GetName().Version;
+        var loggerRoot = new ConsoleLogger();
-        string title = $"Meum CLI v{v?.ToString(3) ?? "Null"}";
+        try
-        Console.Title = title;
-        ColoredConsole.WriteTitle(title, '=', fg: ConsoleColor.Cyan);
-        ColoredConsole.WriteLine(greeting_art, fg: ConsoleColor.Magenta);
-        ColoredConsole.WriteHLine('=', fg: ConsoleColor.Cyan);
-        
-        UserAddress? userAddress = null;
-        DnsEndPoint? serverEndPoint = null;
-        string? serverAddress = null;
-        while (true)
         {
-            try
+            var v = Assembly.GetExecutingAssembly().GetName().Version;
+            string title = $"Meum CLI v{v?.ToString(3) ?? "Null"}";
+            Console.Title = title;
+
+            Functions.InitMsQuic(loggerRoot);
+
+            ColoredConsole.WriteTitle(title, '=', fg: ConsoleColor.Cyan);
+            ColoredConsole.WriteLine(greeting_art, fg: ConsoleColor.Magenta);
+            ColoredConsole.WriteHLine('=', fg: ConsoleColor.Cyan);
+
+            UserAddress? userAddress = null;
+            DnsEndPoint? serverEndPoint = null;
+            string? serverAddress = null;
+            while (true)
             {
-                if(userAddress == null)
+                try
                 {
-                    var addrstr = ColoredConsole.ReadLine("enter user address (name@server.xyz)", ConsoleColor.Blue);
+                    if (userAddress == null)
-                    if (string.IsNullOrEmpty(addrstr))
-                        continue;
-                    userAddress = new(addrstr);
-                }
-                Client client = new(userAddress);
-                if(serverEndPoint == null)
-                {
-                    serverAddress = ColoredConsole.ReadLine("enter server address (server.xyz)", ConsoleColor.Blue);
-                    if (string.IsNullOrEmpty(serverAddress))
                     {
-                        ColoredConsole.WriteLine("null address", ConsoleColor.Red);
+                        ColoredConsole.Write("enter user address (name@server.xyz): ", ConsoleColor.Blue);
-                        continue;
+                        var addrstr = ColoredConsole.ReadLine(ConsoleColor.Cyan);
+                        if (string.IsNullOrEmpty(addrstr))
+                            continue;
+                        userAddress = new(addrstr);
                     }
-                    serverEndPoint = Network.ParseDnsEndPoint(serverAddress);
+
-                    ColoredConsole.WriteTitle(serverAddress, fg: ConsoleColor.Cyan);
+                    Client client = new(loggerRoot);
+                    if (serverEndPoint == null)
+                    {
+                        ColoredConsole.Write("enter server address (server.xyz): ", ConsoleColor.Blue);
+                        serverAddress = ColoredConsole.ReadLine(ConsoleColor.Cyan);
+                        if (string.IsNullOrEmpty(serverAddress))
+                        {
+                            ColoredConsole.WriteLine("null address", ConsoleColor.Red);
+                            continue;
+                        }
+
+                        serverEndPoint = Functions.ParseDnsEndPoint(serverAddress);
+                        ColoredConsole.WriteTitle(serverAddress, fg: ConsoleColor.Cyan);
+                    }
+
+                    ColoredConsole.WriteLine("connecting to the server...", ConsoleColor.Blue);
+                    var conn = await client.ConnectToServerAsync(serverEndPoint);
+                    ColoredConsole.WriteLine("Connected to server", ConsoleColor.Green);
+
+                    await Task.Delay(-1);
+                }
+                catch (Exception ex)
+                {
+                    ColoredConsole.WriteLine(ex.ToStringDemystified(), ConsoleColor.Red);
                 }
-                
-                ColoredConsole.WriteLine("connecting to the server...", ConsoleColor.Blue);
-                var conn = await client.ConnectToServerAsync(serverEndPoint);
-                await conn.PingAsync();
-                await Task.Delay(-1);
-            }
-            catch (Exception ex)
-            {
-                ColoredConsole.WriteLine(ex.ToStringDemystified(), ConsoleColor.Red);
             }
         }
-        // ColoredConsole.ResetColor();
+        catch (Exception ex)
+        {
+            ColoredConsole.WriteLine(ex.ToStringDemystified(), ConsoleColor.Red);
+        }
+        finally
+        {
+            Console.ResetColor();
+        }
     }
 }

Meum.Client/Client.cs

@@ -4,26 +4,63 @@ global using System.Threading;
 global using System.Threading.Tasks;
 global using Meum.Core;
 using System.Net;
+using System.Net.Quic;
+using System.Net.Security;
+using DTLib.Logging;
 
 namespace Meum.Client;
 
 public class Client
 {
     private readonly HashSet<ServerConnection> _connectedServers = new();
+    private readonly ILogger _logger;
+
+    public Client(ILogger logger)
+    {
+        _logger = logger;
+    }
+
     public IReadOnlySet<ServerConnection> ConnectedServers => _connectedServers;
 
-    public UserAddress Address { get; }
+    public UserAddress? Address { get; private set; }
-    
+
-    public Client(UserAddress address)
+    public Task RegisterAsync(UserAddress address)
     {
-        Address = address;
+        return Task.CompletedTask;
     }
     
-    public async Task<ServerConnection> ConnectToServerAsync(DnsEndPoint serverEndPoint)
+    public Task LogInAsync(UserAddress address)
     {
-        var serv = new ServerConnection(serverEndPoint);
+        if(Address != null)
-        await serv.ConnectAsync();
+            throw new InvalidOperationException("Already logged in");
-        _connectedServers.Add(serv);
+        Address = address;
+        return Task.CompletedTask;
+    }
+    
+    public async Task<ServerConnection> ConnectToServerAsync(DnsEndPoint serverEndPoint, CancellationToken ct = default)
+    {
+        var quicConn = await QuicConnection.ConnectAsync(new QuicClientConnectionOptions
+        {
+            // TODO serverEndPoint
+            RemoteEndPoint = new IPEndPoint(IPAddress.Loopback, Constants.ServerPortDefault),
+            DefaultStreamErrorCode = Constants.DefaultStreamErrorCode,
+            DefaultCloseErrorCode = Constants.DefaultCloseErrorCode,
+            ClientAuthenticationOptions = new SslClientAuthenticationOptions
+            {
+                ApplicationProtocols = Constants.ApplicationProtocols,
+                TargetHost = serverEndPoint.Host
+            }
+        }, ct);
+        
+        var timeOutCts = CancellationTokenSource.CreateLinkedTokenSource(ct);
+        timeOutCts.CancelAfter(Constants.ConnectionTimeout);
+        var serv = await ServerConnection.OpenAsync(quicConn,
+            serverEndPoint,
+            _logger,
+            timeOutCts.Token);
+        
+        if(!_connectedServers.Add(serv))
+            throw new Exception($"Is already connected to server '{serverEndPoint.Host}'");
         return serv;
     }
 }

Meum.Client/Meum.Client.csproj

@@ -1,17 +1,13 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net8.0</TargetFramework>
+        <TargetFramework>net9.0</TargetFramework>
-        <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
+        <ImplicitUsings>disable</ImplicitUsings>
     </PropertyGroup>
 
     <ItemGroup>
       <ProjectReference Include="..\Meum.Core\Meum.Core.csproj" />
     </ItemGroup>
 
-    <ItemGroup>
-      <PackageReference Include="DTLib" Version="1.6.0" />
-    </ItemGroup>
-
 </Project>

Meum.Client/ServerConnection.cs

@@ -1,47 +1,43 @@
 using System.Net;
 using System.Net.Quic;
-using System.Net.Security;
+using DTLib.Logging;
-using DTLib.Extensions;
 
 namespace Meum.Client;
 
-public class ServerConnection : IDisposable
+public class ServerConnection : IAsyncDisposable
 {
+    private readonly QuicConnection _quicConnection;
+    private readonly ILogger _logger;
+
     public DnsEndPoint ServerEndPoint { get; }
     
-    private QuicConnection? _quicConnection;
+    
-
+    private ServerConnection(QuicConnection quicConnection, DnsEndPoint serverEndPoint, ILogger logger)
-    public ServerConnection(DnsEndPoint serverEndPoint)
     {
         ServerEndPoint = serverEndPoint;
+        _quicConnection = quicConnection;
+        _logger = logger;
     }
 
-    public async Task ConnectAsync()
+    public static async Task<ServerConnection> OpenAsync(QuicConnection quicConnection,
+        DnsEndPoint serverEndPoint,
+        ILogger logger,
+        CancellationToken ct)
     {
-        _quicConnection = await QuicConnection.ConnectAsync(new QuicClientConnectionOptions
+        var serverConnection = new ServerConnection(quicConnection, serverEndPoint, logger);
-        {
+        
-            RemoteEndPoint = new IPEndPoint(IPAddress.Loopback, Network.ServerPortDefault),
+        var systemStream = await quicConnection.OpenStreamAsync(QuicStreamType.Bidirectional, ct);
-            DefaultStreamErrorCode = Network.DefaultStreamErrorCode,
+        await systemStream.SendPingReceivePong();
-            DefaultCloseErrorCode = Network.DefaultCloseErrorCode,
+        return serverConnection;
-            ClientAuthenticationOptions = new SslClientAuthenticationOptions
+    }
-            {
+    
-                ApplicationProtocols = Network.ApplicationProtocols.ToList(),
+    public override int GetHashCode()
-                TargetHost = ServerEndPoint.Host
+    {
-            }
+        return _quicConnection.RemoteEndPoint.GetHashCode();
-        });
     }
 
-    public async Task PingAsync()
+    public async ValueTask DisposeAsync()
     {
-        var stream = await _quicConnection!.OpenOutboundStreamAsync(QuicStreamType.Bidirectional);
+        await _quicConnection.DisposeAsync();
-        await stream.WriteAsync("Ping\n".ToBytes());
-        StreamReader reader = new StreamReader(stream);
-        string line = await reader.ReadLineAsync() ?? String.Empty;
-        Console.WriteLine(line);
-    }
-
-    public void Dispose()
-    {
-        _quicConnection?.DisposeAsync();
     }
 }

Meum.Core/Constants.cs

@@ -0,0 +1,20 @@
+global using System;
+global using System.Collections.Generic;
+global using System.Threading;
+global using System.Threading.Tasks;
+using System.Net.Security;
+
+namespace Meum.Core;
+
+public static class Constants
+{
+    public static readonly List<SslApplicationProtocol> ApplicationProtocols =
+    [
+        new("Meum-1")
+    ];
+
+    public const int ServerPortDefault = 9320;
+    public const long DefaultStreamErrorCode = 0xA;
+    public const long DefaultCloseErrorCode = 0xB;
+    public static readonly TimeSpan ConnectionTimeout = TimeSpan.FromSeconds(3);
+}

Meum.Core/Functions.cs

@@ -1,24 +1,25 @@
-global using System;
+using System.Net;
-global using System.Collections.Generic;
+using System.Net.Quic;
-global using System.Threading;
+using DTLib.Logging;
-global using System.Threading.Tasks;
+using Unofficial.MsQuic;
-using System.Net;
-using System.Net.Security;
 
 namespace Meum.Core;
 
-public static class Network
+public static class Functions
 {
-    public static readonly SslApplicationProtocol[] ApplicationProtocols =
+    public static void InitMsQuic(ILogger? logger)
-    [
+    {
-        new("Meum-1")
+        if (logger != null)
-    ];
+        {
-
+            HarmonyMsQuicLoadFix.Apply(msg => logger.LogInfo(nameof(HarmonyMsQuicLoadFix), msg));
-    public const int ServerPortDefault = 9320;
+            using var netEventListener = new NetEventListener(logger);
-    public const long DefaultStreamErrorCode = 0xA;
+        }
-    public const long DefaultCloseErrorCode = 0xB;
+        else HarmonyMsQuicLoadFix.Apply();
-
 
+        if (!QuicConnection.IsSupported)
+            throw new Exception("Quic is not supported, check for presence of libmsquic and openssl");
+    }
+    
     public static bool IsValidDomainName(string name)
     {
         return Uri.CheckHostName(name) != UriHostNameType.Unknown;
@@ -32,7 +33,7 @@ public static class Network
         if (colon_index == -1)
         {
             host = address_str;
-            port = ServerPortDefault;
+            port = Constants.ServerPortDefault;
         }
         else
         {

Meum.Core/Messages/AuthorizationRequest.cs

@@ -0,0 +1,9 @@
+using System.Runtime.InteropServices;
+
+namespace Meum.Core.Messages;
+
+[StructLayout(LayoutKind.Sequential)]
+public record struct AuthorizationRequest(byte[] hash)
+{
+    
+}

Meum.Core/Messages/CodeMessage.cs

@@ -0,0 +1,28 @@
+using System.Runtime.InteropServices;
+
+namespace Meum.Core.Messages;
+
+[StructLayout(LayoutKind.Sequential)]
+public struct CodeMessage
+{
+    // 0xb65d6d - meum in 6-bit ascii encoding
+    // 02 - CodeMessage
+    private const uint correct_magic = 0xb65d6d01;
+    
+    /// warning: check with <see cref="ThrowIfInvalid"/> 
+    public uint magic;
+    /// warning: can be any int
+    public MessageTypeCode type_code;
+
+    public CodeMessage(MessageTypeCode t)
+    {
+        magic = correct_magic;
+        type_code = t;
+    }
+    
+    public void ThrowIfInvalid()
+    {
+        if(magic != correct_magic)
+            throw new Exception($"Invalid CodeMessage magic: {magic}");
+    }
+}

Meum.Core/Messages/DataMessageHeader.cs

@@ -0,0 +1,34 @@
+using System.Runtime.InteropServices;
+
+namespace Meum.Core.Messages;
+
+[StructLayout(LayoutKind.Sequential)]
+public struct DataMessageHeader
+{
+    // 0xb65d6d - meum in 6-bit ascii encoding
+    // 02 - DataMessageHeader
+    private const uint correct_magic = 0xb65d6d02;
+    
+    /// warning: check with <see cref="ThrowIfInvalid"/> 
+    public uint magic;
+    /// warning: can be any int
+    public MessageTypeCode type_code;
+    /// warning: check with <see cref="ThrowIfInvalid"/> 
+    public int data_size;
+    
+    
+    public DataMessageHeader(MessageTypeCode t, int size)
+    {
+        magic = correct_magic;
+        type_code = t;
+        data_size = size;
+    }
+    
+    public void ThrowIfInvalid()
+    {
+        if(magic != correct_magic)
+            throw new Exception($"Invalid DataMessageHeader magic: {magic}");
+        if(data_size < 1)
+            throw new Exception($"Invalid DataMessageHeader data size: {data_size}");
+    }
+}

Meum.Core/Messages/MessageTypeCode.cs

@@ -0,0 +1,8 @@
+namespace Meum.Core.Messages;
+
+public enum MessageTypeCode
+{
+    Ping, Pong,
+    RegistrationRequest, RegistrationResponse,
+    AuthorizationRequest, AuthorizationResponse,
+}

Meum.Core/Meum.Core.csproj

@@ -1,5 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>disable</ImplicitUsings>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Unofficial.MsQuic" Version="2.4.6" />
+    <PackageReference Include="DTLib" Version="1.7.3" />
+    <PackageReference Include="Unofficial.MsQuic" Version="2.4.10" />
   </ItemGroup>
 </Project>

Meum.Core/NetEventListener.cs

@@ -0,0 +1,37 @@
+using System.Diagnostics.Tracing;
+using System.Linq;
+using DTLib.Logging;
+
+namespace Meum.Core;
+
+internal class NetEventListener(ILogger _logger) : EventListener
+{
+    protected override void OnEventSourceCreated(EventSource eventSource)
+    {
+        // Filter for NetEventSource
+        if (eventSource.Name.Contains("System.Net"))
+        {
+            EnableEvents(eventSource, EventLevel.LogAlways, EventKeywords.All);
+        }
+    }
+
+    protected override void OnEventWritten(EventWrittenEventArgs eventData)
+    {
+        LogSeverity severity = eventData.Level switch
+        {
+            EventLevel.LogAlways => LogSeverity.Info,
+            EventLevel.Critical => LogSeverity.Error,
+            EventLevel.Error => LogSeverity.Error,
+            EventLevel.Warning => LogSeverity.Warn,
+            EventLevel.Informational => LogSeverity.Info,
+            EventLevel.Verbose => LogSeverity.Debug,
+            _ => throw new ArgumentOutOfRangeException(eventData.Level.ToString())
+        };
+        IEnumerable<object?> payload = eventData.Payload ?? Enumerable.Empty<object?>();
+        var message = string.Join(", ", payload);
+        string context = eventData.EventSource.Name;
+        if (context.Contains("System.Net.Quic"))
+            context = "MsQuic";
+        _logger.Log(context, severity, message);
+    }
+}

Meum.Core/QuicExtensions.cs

@@ -0,0 +1,24 @@
+using System.Net.Quic;
+
+namespace Meum.Core;
+
+public static class QuicExtensions
+{
+    public static async Task<QuicStreamWrapper> AcceptStreamAsync(this QuicConnection conn,
+        QuicStreamType streamType, CancellationToken ct = default)
+    {
+        var s = await conn.AcceptInboundStreamAsync(ct);
+        if (s.Type != streamType)
+            throw new Exception($"Accepted stream type is invalid: {s.Type} instead of {streamType}");
+        var w = new QuicStreamWrapper(s);
+        return w;
+    }
+
+    public static async Task<QuicStreamWrapper> OpenStreamAsync(this QuicConnection conn,
+        QuicStreamType streamType, CancellationToken ct = default)
+    {
+        var s = await conn.OpenOutboundStreamAsync(streamType, ct);
+        var w = new QuicStreamWrapper(s);
+        return w;
+    }
+}

Meum.Core/QuicStreamWrapper.cs

@@ -0,0 +1,100 @@
+using System.Buffers;
+using System.Net.Quic;
+using System.Runtime.InteropServices;
+using Meum.Core.Messages;
+
+namespace Meum.Core;
+
+public class QuicStreamWrapper : IAsyncDisposable
+{
+    private QuicStream _stream;
+
+    public QuicStreamWrapper(QuicStream stream)
+    {
+        _stream = stream;
+    }
+    
+    public async ValueTask<T> ReadStructAsync<T>(CancellationToken ct = default)
+        where T : struct
+    {
+        byte[] buffer = ArrayPool<byte>.Shared.Rent(Marshal.SizeOf(typeof(T)));
+        var handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
+        try
+        {
+            await _stream.ReadExactlyAsync(buffer, ct);
+            return (T) Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(T))!;
+        }
+        finally
+        {
+            handle.Free();
+            ArrayPool<byte>.Shared.Return(buffer);
+        }
+    }
+    
+    public ValueTask WriteStructAsync<T>(T msg_struct, CancellationToken ct = default)
+        where T : struct
+    {
+        byte[] buffer = ArrayPool<byte>.Shared.Rent(Marshal.SizeOf(typeof(T)));
+        var handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
+        try
+        {
+            Marshal.StructureToPtr(msg_struct, handle.AddrOfPinnedObject(), false);
+            return _stream.WriteAsync(buffer, ct);
+        }
+        finally
+        {
+            handle.Free();
+            ArrayPool<byte>.Shared.Return(buffer);
+        }
+    }
+
+    public ValueTask<int> ReadAsync(Memory<byte> buffer, CancellationToken ct = default) 
+        => _stream.ReadAsync(buffer, ct);
+    
+    public ValueTask WriteAsync(ReadOnlyMemory<byte> buffer, CancellationToken ct = default) 
+        => _stream.WriteAsync(buffer, ct);
+
+    public ValueTask WriteCodeMessageAsync(MessageTypeCode messageTypeCode, CancellationToken ct = default)
+    {
+        CodeMessage m = new CodeMessage(messageTypeCode);
+        return WriteStructAsync(m, ct);
+    }
+
+    public async ValueTask<MessageTypeCode> ReadCodeMessageAsync(CancellationToken ct = default)
+    {
+        CodeMessage m = await ReadStructAsync<CodeMessage>(ct);
+        m.ThrowIfInvalid();
+        return m.type_code;
+    }
+    
+    public async ValueTask<DataMessageHeader> ReadDataMessageHeaderAsync(CancellationToken ct = default)
+    {
+        var m = await ReadStructAsync<DataMessageHeader>(ct);
+        m.ThrowIfInvalid();
+        return m;
+    }
+    
+    
+    public async Task ReceivePingSendPong()
+    {
+        var messageCode = await ReadCodeMessageAsync();
+        if(messageCode != MessageTypeCode.Ping)
+            throw new Exception($"Failed to test application protocol: expected Ping, got {messageCode}");
+        await WriteCodeMessageAsync(MessageTypeCode.Pong);
+    }
+    
+    
+    public async Task SendPingReceivePong()
+    {
+        await WriteCodeMessageAsync(MessageTypeCode.Ping);
+        var messageCode = await ReadCodeMessageAsync();
+        if(messageCode != MessageTypeCode.Pong)
+            throw new Exception($"Failed to test application protocol: expected Pong, got {messageCode}");
+    }
+    
+    public async ValueTask DisposeAsync()
+    {
+        _stream.Close();
+        await _stream.DisposeAsync();
+    }
+}

Meum.Core/UserAddress.cs

@@ -26,7 +26,7 @@ public class UserAddress
             throw new FormatException($"Invalid user name '{Name}' in address '{addrstr}'");
         string serverstr = addrstr.Substring(at_index + 1);
         
-        RegistrationServer = Network.ParseDnsEndPoint(serverstr);
+        RegistrationServer = Functions.ParseDnsEndPoint(serverstr);
     }
 
     public override string ToString() => Full;

Meum.Server/ClientConnection.cs

@@ -0,0 +1,57 @@
+using System.Net.Quic;
+using DTLib.Logging;
+using Meum.Core.Messages;
+
+namespace Meum.Server;
+
+public class ClientConnection : IAsyncDisposable
+{
+    private readonly QuicConnection _quicConnection;
+    private QuicStreamWrapper _systemStream;
+    private ILogger _logger;
+    
+    private ClientConnection(QuicConnection quicConnection, QuicStreamWrapper systemStream, ILogger logger)
+    {
+        _quicConnection = quicConnection;
+        _systemStream = systemStream;
+        _logger = logger;
+    }
+
+    public static async Task<ClientConnection> OpenAsync(
+        QuicConnection quicConnection,
+        ILogger logger,
+        CancellationToken ct)
+    {
+        
+        var systemStream = await quicConnection.AcceptStreamAsync(QuicStreamType.Bidirectional, ct);
+        await systemStream.ReceivePingSendPong();
+        var clientConnection = new ClientConnection(quicConnection, systemStream, logger);
+        
+        DataMessageHeader header = await systemStream.ReadDataMessageHeaderAsync(ct);
+        switch (header.type_code)
+        {
+            case MessageTypeCode.RegistrationRequest:
+                
+                break;
+            case MessageTypeCode.AuthorizationRequest:
+                // if (authorized)
+                //     clientConnection.HandleClientRequestsAsync()
+                break;
+            default:
+                throw new Exception($"New connection sent unexpected message: {header.type_code}");
+        }
+
+        return clientConnection;
+    }
+    
+    
+    // private async void HandleClientRequestsAsync(CancellationToken ct = default)
+    // {
+    //     
+    // }
+    
+    public async ValueTask DisposeAsync()
+    {
+        await _quicConnection.DisposeAsync();
+    }
+}

Meum.Server/Config.cs

@@ -1,11 +0,0 @@
-using Meum.Core;
-
-namespace Meum.Server;
-
-public class Config
-{
-    public string listener_ip { get; set; } = "127.0.0.1";
-    public int listener_port { get; set; } = Network.ServerPortDefault;
-    public string certificate_path { get; set; } = "self-signed.pem";
-    public string? key_path { get; set; } = "self-signed.key";
-}

Meum.Server/Meum.Server.csproj

@@ -1,13 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <OutputType>Exe</OutputType>
+        <Version>0.0.1</Version>
+        <TargetFramework>net9.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>disable</ImplicitUsings>
     </PropertyGroup>
     
     <ItemGroup>
         <ProjectReference Include="..\Meum.Core\Meum.Core.csproj" />
     </ItemGroup>
     
-    <ItemGroup>
-      <PackageReference Include="DTLib" Version="1.6.0" />
-    </ItemGroup>
 </Project>

Meum.Server/Program.cs

@@ -3,62 +3,37 @@ global using System.Collections.Generic;
 global using System.Threading;
 global using System.Threading.Tasks;
 global using Meum.Core;
-using System.IO;
-using System.Linq;
-using System.Net;
-using System.Net.Quic;
-using System.Net.Security;
-using System.Runtime.Serialization;
-using System.Security.Cryptography.X509Certificates;
 using DTLib.Console;
 using DTLib.Demystifier;
-using DTLib.Extensions;
+using DTLib.Filesystem;
+using DTLib.Logging;
 
 namespace Meum.Server;
 
-class Program
+static class Program
 {
+    static readonly IOPath config_path = "Meum.Server.config.json";
+    
     static async Task Main(string[] args)
     {
         try
         {
-            var config = new Config();
+            var config = ServerConfig.LoadOrCreate(config_path);
-            var certificate = X509Certificate2.CreateFromPemFile(config.certificate_path, config.key_path);
+            var logger = new ConsoleLogger();
-            if(!certificate.Verify())
+            Functions.InitMsQuic(logger);
-                throw new Exception("Certificate is not valid");
+            
-            var serverConnectionOptions = new QuicServerConnectionOptions
+            var server = new Server(config, logger);
-            {
+            await server.ListenAsync();
-                DefaultStreamErrorCode = Network.DefaultStreamErrorCode,
-                DefaultCloseErrorCode = Network.DefaultCloseErrorCode,
-                ServerAuthenticationOptions = new SslServerAuthenticationOptions
-                {
-                    ApplicationProtocols = Network.ApplicationProtocols.ToList(),
-                    ServerCertificate = certificate,
-                    ClientCertificateRequired = false
-                }
-            };
-            var listenerOptions = new QuicListenerOptions
-            {
-                ListenEndPoint = new IPEndPoint(IPAddress.Parse(config.listener_ip), config.listener_port),
-                ApplicationProtocols = Network.ApplicationProtocols.ToList(),
-                ConnectionOptionsCallback = (_, _, _) => ValueTask.FromResult(serverConnectionOptions)
-            };
-            var listener = await QuicListener.ListenAsync(listenerOptions);
             while (true)
             {
                 try
                 {
-                    var conn = await listener.AcceptConnectionAsync();
+                    var conn = await server.AcceptConnectionAsync();
-                    var stream = await conn.AcceptInboundStreamAsync();
+                    
-                    StreamReader reader = new(stream);
-                    string line = await reader.ReadLineAsync() ?? "";
-                    Console.WriteLine(line);
-                    await stream.WriteAsync("Pong\n".ToBytes());
-                    await conn.CloseAsync(Network.DefaultCloseErrorCode);
                 }
                 catch (Exception ex)
                 {
-                    ColoredConsole.WriteLine(ex.ToStringDemystified(), ConsoleColor.Red);
+                    logger.LogError("Main", ex.ToStringDemystified());
                 }
             }
         }
@@ -66,5 +41,9 @@ class Program
         {
             ColoredConsole.WriteLine(ex.ToStringDemystified(), ConsoleColor.Red);
         }
+        finally
+        {
+            Console.ResetColor();
+        }
     }
 }

Meum.Server/README.md

@@ -1,4 +1,4 @@
 ## Create self-signed certificate
 ```sh
-dotnet dev-certs https -ep bin/Debug/net8.0/self-signed.pfx --trust --format PEM --no-password
+dotnet dev-certs https -ep bin/Debug/net9.0/self-signed.pem --trust --format PEM --no-password
 ```

Meum.Server/Server.cs

@@ -0,0 +1,66 @@
+using System.Net;
+using System.Net.Quic;
+using System.Net.Security;
+using System.Security.Cryptography.X509Certificates;
+using DTLib.Logging;
+
+namespace Meum.Server;
+
+public class Server
+{
+    private readonly ServerConfig _config;
+    private readonly X509Certificate _certificate; 
+    private readonly ILogger _logger;
+    private QuicListener? _listener;
+
+
+    public Server(ServerConfig config, ILogger logger, X509Certificate? certificate = null)
+    {
+        _config = config;
+        _logger = logger;
+        _certificate = certificate ?? 
+                       X509Certificate2.CreateFromPemFile(config.certificate_path, config.key_path);
+    }
+
+    public async ValueTask ListenAsync()
+    {
+        var serverConnectionOptions = new QuicServerConnectionOptions
+        {
+            DefaultStreamErrorCode = Constants.DefaultStreamErrorCode,
+            DefaultCloseErrorCode = Constants.DefaultCloseErrorCode,
+            ServerAuthenticationOptions = new SslServerAuthenticationOptions
+            {
+                ApplicationProtocols = Constants.ApplicationProtocols,
+                ServerCertificate = _certificate,
+                ClientCertificateRequired = false
+            }
+        };
+        var listenerOptions = new QuicListenerOptions
+        {
+            ListenEndPoint = new IPEndPoint(IPAddress.Parse(_config.listener_ip), _config.listener_port),
+            ApplicationProtocols = Constants.ApplicationProtocols,
+            ConnectionOptionsCallback = (_, _, _) => ValueTask.FromResult(serverConnectionOptions)
+        };
+        _listener = await QuicListener.ListenAsync(listenerOptions);
+    }
+
+
+    public async Task<ClientConnection> AcceptConnectionAsync(CancellationToken ct = default)
+    {
+        if (_listener == null)
+            throw new Exception("Server is not listening");
+        
+        while (true)
+        {
+            ct.ThrowIfCancellationRequested();
+            var quicConnection = await _listener.AcceptConnectionAsync(ct);
+            var timeOutCts = CancellationTokenSource.CreateLinkedTokenSource(ct);
+            timeOutCts.CancelAfter(Constants.ConnectionTimeout);
+            var clientConnection = await ClientConnection.OpenAsync(
+                quicConnection, 
+                _logger, 
+                timeOutCts.Token);
+            return clientConnection;
+        }
+    }
+}

Meum.Server/ServerConfig.cs

@@ -0,0 +1,39 @@
+using System.Text.Json;
+using DTLib.Filesystem;
+
+namespace Meum.Server;
+
+public class ServerConfig
+{
+    public string listener_ip { get; set; } = "127.0.0.1";
+    public int listener_port { get; set; } = Constants.ServerPortDefault;
+    public string certificate_path { get; set; } = "self-signed.pem";
+    public string? key_path { get; set; } = "self-signed.key";
+
+    private static JsonSerializerOptions _serializerOptions = new()
+    {
+        WriteIndented = true,
+    };
+    
+    public void Save(IOPath file_path)
+    {
+        string serialized = JsonSerializer.Serialize(this, _serializerOptions);
+        if (string.IsNullOrEmpty(serialized))
+            throw new Exception("can't serialize config");
+        File.WriteAllText(file_path, serialized);
+    }
+
+    public static ServerConfig LoadOrCreate(IOPath file_path)
+    {
+        if(File.Exists(file_path))
+        {
+            string serialized = File.ReadAllText(file_path);
+            return JsonSerializer.Deserialize<ServerConfig>(serialized)
+                ?? throw new Exception("can't deserialize config");
+        }
+        
+        var c = new ServerConfig();
+        c.Save(file_path);
+        return c;
+    }
+}

Meum.sln

@@ -9,6 +9,7 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "solution_items", "solution_items", "{9375C0E5-DB78-4E77-869B-F9F7DC2651D1}"
 	ProjectSection(SolutionItems) = preProject
 		Directory.Build.props = Directory.Build.props
+		.gitignore = .gitignore
 	EndProjectSection
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Meum.Client", "Meum.Client\Meum.Client.csproj", "{6DADE8A1-B363-4888-BB9B-72282B9AC769}"