GameServer + packet types, we aren't parsing yet

AscNet.Common/AscNet.Common.csproj

@@ -8,7 +8,6 @@
 
   <ItemGroup>
     <PackageReference Include="Config.Net" Version="5.1.5" />
-    <PackageReference Include="Google.Protobuf" Version="3.24.3" />
     <PackageReference Include="MongoDB.Driver" Version="2.21.0" />
   </ItemGroup>
 

AscNet.Common/Database/Account.cs

@@ -33,7 +33,7 @@ namespace AscNet.Common.Database
         public static Account Create(string username, string password)
         {
             if (collection.AsQueryable().FirstOrDefault(x => x.Username == username) is not null)
-                throw new ArgumentException("Username is already registered!", "username");
+                throw new ArgumentException("Username is already registered!", nameof(username));
 
             Account account = new()
             {

AscNet.Common/Util/Crypto.cs

@@ -1,4 +1,6 @@
-namespace AscNet.Common.Util
+using System.Security.Cryptography;
+
+namespace AscNet.Common.Util
 {
     public static class Crypto
     {
@@ -11,5 +13,78 @@
 
             return encryptedData;
         }
+
+        public static class HaruCrypt
+        {
+            private static readonly byte[] key = new byte[] { 103, 40, 227, 236, 173, 175, 148, 243, 66, 252, 58, 22, 68, 192, 159, 15, 187, 15, 15, 29, 209, 209, 212, 66, 104, 16, 252, 194, 227, 14, 116, 112, 196, 221, 5, 1, 4, 173, 165, 69, 45, 193, 95, 10, 67, 38, 167, 239, 96, 184, 133, 75, 152, 196, 36, 121, 251, 7, 73, 82, 219, 25, 118, 70, 153, 232, 120, 120, 147, 10, 88, 106, 214, 187, 216, 49, 224, 57, 1, 233, 110, 40, 65, 85, 246, 197, 4, 20, 56, 74, 245, 41, 63, 169, 188, 104, 89, 49, 115, 254, 100, 77, 79, 11, 148, 242, 95, 88, 241, 111, 48, 130, 169, 200, 224, 135, 121, 161, 72, 84, 5, 100, 135, 70, 141, 94, 244, 114, 58, 28, 87, 181, 205, 221, 154, 184, 197, 98, 210, 202, 252, 124, 144, 9, 112, 163, 24, 254, 119, 188, 5, 230, 40, 79, 171, 17, 156, 212, 134, 41, 79, 134, 26, 251, 123, 219, 191, 136, 21, 84, 192, 91, 24, 33, 68, 101, 85, 61, 186, 215, 191, 37, 45, 51, 117, 227, 14, 145, 56, 43, 32, 67, 48, 98, 192, 41, 136, 223, 50, 163, 97, 251, 174, 59, 59, 147, 237, 177, 31, 159, 52, 243, 245, 247, 148, 139, 21, 92, 139, 80, 47, 4, 105, 59, 227, 220, 180, 231, 176, 187, 205, 203, 148, 121, 98, 90, 87, 131, 245, 3, 63, 239, 57, 117, 102, 134, 40, 172, 60, 128, 108, 102, 216, 247, 133, 102 };
+            private static readonly RSACryptoServiceProvider rsa = new();
+            private static readonly byte[] signature = new byte[128];
+#pragma warning disable SYSLIB0021 // Type or member is obsolete
+            private static readonly SHA1 sha = new SHA1CryptoServiceProvider();
+#pragma warning restore SYSLIB0021 // Type or member is obsolete
+            private const string PUBLIC_KEY = "<RSAKeyValue><Modulus>kZE/f0ifi0DH3uP3KCWOPqTyQ3MsQKHf9X4Z65S36s226RkdkZL2kHTz20n+IlOvGChi3ByDMFLawlyB0MCW94WDnc1Mc/PtVKo6D8gBEcSvdjDbhC4Ly0f2hMHS/SNdGPMAMkEWGNvIvfuT1TEaWTPsxRLZbfASp2KPG7Wjdck=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
+
+            static HaruCrypt()
+            {
+                rsa.FromXmlString(PUBLIC_KEY);
+            }
+
+            public static void Encrypt(byte[] content)
+            {
+                Encrypt(content, 0, content.Length);
+            }
+
+            public static void Encrypt(byte[] content, int offset, int count)
+            {
+                int num = count % key.Length;
+                for (int i = 0; i < count; i++)
+                {
+                    int num2 = i + offset;
+                    int num3 = (int)content[num2];
+                    num3 ^= (int)key[num];
+                    if (i > 0)
+                    {
+                        num3 ^= (int)content[num2 - 1];
+                    }
+                    num3 ^= (int)key[i % key.Length];
+                    int num4 = ((int)((i + 1 < count) ? content[num2 + 1] : 0) + count) % 8;
+                    num3 = (num3 << 8 - num4 | num3 >> num4);
+                    content[num2] = (byte)num3;
+                }
+            }
+
+            public static void Decrypt(byte[] content)
+            {
+                Decrypt(content, 0, content.Length);
+            }
+
+            private static void Decrypt(byte[] bytes, int offset, int count)
+            {
+                int num = count % key.Length;
+                for (int i = count - 1; i >= 0; i--)
+                {
+                    int num2 = i + offset;
+                    int num3 = (int)bytes[num2];
+                    int num4 = ((int)((i + 1 < count) ? bytes[num2 + 1] : 0) + count) % 8;
+                    num3 = (num3 >> 8 - num4 | num3 << num4);
+                    num3 ^= (int)key[i % key.Length];
+                    if (num2 > offset)
+                    {
+                        num3 ^= (int)bytes[num2 - 1];
+                    }
+                    num3 ^= (int)key[num];
+                    bytes[num2] = (byte)num3;
+                }
+            }
+
+            private static bool Verify(byte[] content, ref int offset, ref int count)
+            {
+                Buffer.BlockCopy(content, offset, signature, 0, signature.Length);
+                offset += signature.Length;
+                count -= signature.Length;
+                byte[] hash = sha.ComputeHash(content, offset, count);
+                return rsa.VerifyHash(hash, signature, HashAlgorithmName.SHA1, RSASignaturePadding.Pkcs1);
+            }
+        }
     }
 }

AscNet.GameServer/AscNet.GameServer.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="MessagePack" Version="2.5.129" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\AscNet.Common\AscNet.Common.csproj" />
+  </ItemGroup>
+
+</Project>

AscNet.GameServer/Packet.cs

@@ -0,0 +1,76 @@
+using MessagePack;
+
+namespace AscNet.GameServer
+{
+#pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
+    [MessagePackObject(false)]
+    public class Packet
+    {
+        [Key(0)]
+        public int No;
+
+        [Key(1)]
+        public ContentType Type;
+
+        [Key(2)]
+        public byte[] Content;
+
+        public enum ContentType
+        {
+            Request,
+            Response,
+            Push,
+            Exception
+        }
+
+        [MessagePackObject(false)]
+        public class Request
+        {
+            [Key(0)]
+            public int Id;
+
+            [Key(1)]
+            public string Name;
+
+            [Key(2)]
+            public byte[] Content;
+        }
+
+        [MessagePackObject(false)]
+        public class Response
+        {
+            [Key(0)]
+            public int Id;
+
+            [Key(1)]
+            public string Name;
+
+            [Key(2)]
+            public byte[] Content;
+        }
+
+        [MessagePackObject(false)]
+        public class Push
+        {
+            [Key(0)]
+            public string Name;
+
+            [Key(1)]
+            public byte[] Content;
+        }
+
+        [MessagePackObject(false)]
+        public class Exception
+        {
+            [Key(0)]
+            public int Id;
+
+            [Key(1)]
+            public int Code;
+
+            [Key(2)]
+            public string Message;
+        }
+    }
+#pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
+}

AscNet.GameServer/Server.cs

@@ -0,0 +1,54 @@
+using System.Net.Sockets;
+using System.Net;
+using AscNet.Common.Util;
+
+namespace AscNet.GameServer
+{
+    public class Server
+    {
+        public static readonly Logger c = new(nameof(GameServer), ConsoleColor.Cyan);
+        public readonly Dictionary<string, Session> Sessions = new();
+        private static Server? _instance;
+        private readonly TcpListener listener;
+
+        public static Server Instance
+        {
+            get
+            {
+                return _instance ??= new Server();
+            }
+        }
+
+        public Server()
+        {
+            listener = new(IPAddress.Parse("0.0.0.0"), Common.Common.config.GameServer.Port);
+        }
+
+        public void Start()
+        {
+            for (; ; )
+            {
+                try
+                {
+                    listener.Start();
+                    c.Log($"{nameof(GameServer)} started and listening on port {Common.Common.config.GameServer.Port}");
+
+                    for (; ; )
+                    {
+                        TcpClient tcpClient = listener.AcceptTcpClient();
+                        string id = tcpClient.Client.RemoteEndPoint!.ToString()!;
+
+                        c.Warn($"{id} connected");
+                        Sessions.Add(id, new Session(id, tcpClient));
+                    }
+                }
+                catch (Exception ex)
+                {
+                    c.Error("TCP listener error: " + ex.Message);
+                    c.Log("Waiting 3 seconds before restarting...");
+                    Thread.Sleep(3000);
+                }
+            }
+        }
+    }
+}

AscNet.GameServer/Session.cs

@@ -0,0 +1,65 @@
+using System.Net.Sockets;
+using AscNet.Common.Util;
+
+namespace AscNet.GameServer
+{
+    public class Session
+    {
+        public readonly string id;
+        public readonly TcpClient client;
+        public readonly Logger c;
+        private long lastPacketTime = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
+        // private ushort packetNo = 0;
+
+        public Session(string id, TcpClient tcpClient)
+        {
+            this.id = id;
+            client = tcpClient;
+            c = new(id, ConsoleColor.DarkGray);
+
+            Task.Run(ClientLoop);
+        }
+
+        public async void ClientLoop()
+        {
+            NetworkStream stream = client.GetStream();
+            byte[] msg = new byte[1 << 16];
+
+            while (client.Connected)
+            {
+                try
+                {
+                    Array.Clear(msg, 0, msg.Length);
+                    int len = stream.Read(msg, 0, msg.Length);
+
+                    if (len > 0)
+                    {
+                        lastPacketTime = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
+
+                    }
+
+                }
+                catch (Exception)
+                {
+                    break;
+                }
+                await Task.Delay(10);
+                // 10 sec timeout
+                if (DateTimeOffset.UtcNow.ToUnixTimeMilliseconds() - lastPacketTime > 10000)
+                    break;
+            }
+
+            DisconnectProtocol();
+        }
+
+        public void DisconnectProtocol()
+        {
+            if (Server.Instance.Sessions.GetValueOrDefault(id) is null)
+                return;
+
+            c.Warn($"{id} disconnected");
+            client.Close();
+            Server.Instance.Sessions.Remove(id);
+        }
+    }
+}

AscNet.sln

@@ -9,6 +9,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AscNet.Common", "AscNet.Com
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AscNet.SDKServer", "AscNet.SDKServer\AscNet.SDKServer.csproj", "{B5040F93-BA7F-4E76-AF54-E3FAA857A5DA}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AscNet.GameServer", "AscNet.GameServer\AscNet.GameServer.csproj", "{EB20C0CB-7CA1-459F-8410-7A27CC99F98C}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,6 +29,10 @@ Global
 		{B5040F93-BA7F-4E76-AF54-E3FAA857A5DA}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B5040F93-BA7F-4E76-AF54-E3FAA857A5DA}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B5040F93-BA7F-4E76-AF54-E3FAA857A5DA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EB20C0CB-7CA1-459F-8410-7A27CC99F98C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EB20C0CB-7CA1-459F-8410-7A27CC99F98C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EB20C0CB-7CA1-459F-8410-7A27CC99F98C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EB20C0CB-7CA1-459F-8410-7A27CC99F98C}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

AscNet/AscNet.csproj

@@ -8,6 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\AscNet.GameServer\AscNet.GameServer.csproj" />
     <ProjectReference Include="..\AscNet.SDKServer\AscNet.SDKServer.csproj" />
   </ItemGroup>
 	<ItemGroup>