/// <summary>
/// Starts this server.
/// </summary>
public async Task StartServerAsync()
{
this.StartTime = DateTimeOffset.Now;
this.Logger.LogInformation($"Launching Obsidian Server v{Version} with ID {Id}");
// Check if MPDM and OM are enabled, if so, we can't handle connections
if (this.Config.MulitplayerDebugMode && this.Config.OnlineMode)
{
this.Logger.LogError("Incompatible Config: Multiplayer debug mode can't be enabled at the same time as online mode since usernames will be overwritten");
this.StopServer();
return;
}
await Registry.RegisterBlocksAsync();
await Registry.RegisterItemsAsync();
await Registry.RegisterBiomesAsync();
await Registry.RegisterDimensionsAsync();
await Registry.RegisterTagsAsync();
PacketHandler.RegisterHandlers();
this.Logger.LogInformation($"Loading properties...");
await(this.Operators as OperatorList).InitializeAsync();
await this.RegisterDefaultAsync();
this.Logger.LogInformation("Loading plugins...");
Directory.CreateDirectory(Path.Join(ServerFolderPath, "plugins")); // Creates if doesn't exist.
this.PluginManager.DirectoryWatcher.Filters = new[] { ".cs", ".dll" };
this.PluginManager.DefaultPermissions = API.Plugins.PluginPermissions.All;
this.PluginManager.DirectoryWatcher.Watch(Path.Join(ServerFolderPath, "plugins"));
await Task.WhenAll(Config.DownloadPlugins.Select(path => PluginManager.LoadPluginAsync(path)));
this.World = new World("world", this);
if (!this.World.Load())
{
if (!this.WorldGenerators.TryGetValue(this.Config.Generator, out WorldGenerator value))
{
this.Logger.LogWarning($"Unknown generator type {this.Config.Generator}");
}
var gen = value ?? new SuperflatGenerator();
this.Logger.LogInformation($"Creating new {gen.Id} ({gen}) world...");
this.World.Init(gen);
// TODO: save world
}
if (!this.Config.OnlineMode)
{
this.Logger.LogInformation($"Starting in offline mode...");
}
_ = Task.Run(this.ServerLoop);
this.Logger.LogDebug($"Listening for new clients...");
this.tcpListener.Start();
while (!this.cts.IsCancellationRequested)
{
if (this.tcpListener.Pending())
{
var tcp = await this.tcpListener.AcceptTcpClientAsync();
this.Logger.LogDebug($"New connection from client with IP {tcp.Client.RemoteEndPoint}");
var client = new Client(tcp, this.Config, Math.Max(0, this.clients.Count + this.World.TotalLoadedEntities()), this);
this.clients.Add(client);
_ = Task.Run(client.StartConnectionAsync);
}
await Task.Delay(50);
}
this.Logger.LogWarning("Server is shutting down...");
}
private Task <Packet> GetNextPacketAsync() => this.compressionEnabled ? PacketHandler.ReadCompressedPacketAsync(this.minecraftStream) : PacketHandler.ReadPacketAsync(this.minecraftStream);
public async Task StartConnectionAsync()
{
_ = Task.Run(ProcessQueue);
while (!Cancellation.IsCancellationRequested && this.tcp.Connected)
{
Packet packet = await this.GetNextPacketAsync();
if (this.State == ClientState.Play && packet.data.Length < 1)
{
this.Disconnect();
}
switch (this.State)
{
case ClientState.Status: //server ping/list
switch (packet.id)
{
case 0x00:
var status = new ServerStatus(Server);
await this.SendPacketAsync(new RequestResponse(status));
break;
case 0x01:
await this.SendPacketAsync(new PingPong(packet.data));
this.Disconnect();
break;
}
break;
case ClientState.Handshaking:
if (packet.id == 0x00)
{
if (packet == null)
{
throw new InvalidOperationException();
}
var handshake = await PacketSerializer.FastDeserializeAsync <Handshake>(packet.data);
var nextState = handshake.NextState;
if (nextState != ClientState.Status && nextState != ClientState.Login)
{
this.Logger.LogDebug($"Client sent unexpected state ({(int)nextState}), forcing it to disconnect");
await this.DisconnectAsync(ChatMessage.Simple("you seem suspicious"));
}
this.State = nextState;
this.Logger.LogInformation($"Handshaking with client (protocol: {handshake.Version}, server: {handshake.ServerAddress}:{handshake.ServerPort})");
}
else
{
//Handle legacy ping stuff
}
break;
case ClientState.Login:
switch (packet.id)
{
default:
this.Logger.LogError("Client in state Login tried to send an unimplemented packet. Forcing it to disconnect.");
await this.DisconnectAsync("Unknown Packet Id.");
break;
case 0x00:
var loginStart = await PacketSerializer.FastDeserializeAsync <LoginStart>(packet.data);
string username = config.MulitplayerDebugMode ? $"Player{Program.Random.Next(1, 999)}" : loginStart.Username;
this.Logger.LogDebug($"Received login request from user {loginStart.Username}");
await this.Server.DisconnectIfConnectedAsync(username);
if (this.config.OnlineMode)
{
var user = await MinecraftAPI.GetUserAsync(loginStart.Username);
this.Player = new Player(Guid.Parse(user.Id), loginStart.Username, this)
{
World = this.Server.World
};
this.packetCryptography.GenerateKeyPair();
var values = this.packetCryptography.GeneratePublicKeyAndToken();
this.randomToken = values.randomToken;
await this.SendPacketAsync(new EncryptionRequest(values.publicKey, this.randomToken));
break;
}
this.Player = new Player(UUIDFactory.CreateUUID(3, 1, $"OfflinePlayer:{username}"), username, this)
{
World = this.Server.World
};
//await this.SetCompression();
await this.ConnectAsync();
break;
case 0x01:
var encryptionResponse = PacketSerializer.FastDeserialize <EncryptionResponse>(packet.data);
this.sharedKey = this.packetCryptography.Decrypt(encryptionResponse.SharedSecret);
var decryptedToken = this.packetCryptography.Decrypt(encryptionResponse.VerifyToken);
if (!decryptedToken.SequenceEqual(this.randomToken))
{
await this.DisconnectAsync("Invalid token..");
break;
}
var serverId = sharedKey.Concat(this.packetCryptography.PublicKey).ToArray().MinecraftShaDigest();
JoinedResponse response = await MinecraftAPI.HasJoined(this.Player.Username, serverId);
if (response is null)
{
this.Logger.LogWarning($"Failed to auth {this.Player.Username}");
await this.DisconnectAsync("Unable to authenticate..");
break;
}
this.encryptionEnabled = true;
this.minecraftStream = new AesStream(this.debugStream ?? (Stream)this.tcp.GetStream(), this.sharedKey);
//await this.SetCompression();
await ConnectAsync();
break;
case 0x02:
// Login Plugin Response
break;
}
break;
case ClientState.Play:
//await this.Logger.LogDebugAsync($"Received Play packet with Packet ID 0x{packet.id.ToString("X")}");
await PacketHandler.HandlePlayPackets(packet, this);
break;
}
//await Task.Delay(50);
}
Logger.LogInformation($"Disconnected client");
if (this.State == ClientState.Play)
{
await this.Server.Events.InvokePlayerLeaveAsync(new PlayerLeaveEventArgs(this.Player));
}
if (tcp.Connected)
{
this.tcp.Close();
if (this.Player != null)
{
this.Server.OnlinePlayers.TryRemove(this.Player.Uuid, out var _);
}
}
}
private async Task ConnectAsync(Guid uuid)
{
await PacketHandler.CreateAsync(new LoginSuccess(uuid, this.Player.Username), this.MinecraftStream);
this.Logger.LogDebug($"Sent Login success to user {this.Player.Username} {this.Player.Uuid.ToString()}");
this.State = ClientState.Play;
this.Player.Gamemode = Gamemode.Creative;
await PacketHandler.CreateAsync(new JoinGame((int)(EntityId.Player | (EntityId)this.PlayerId), Gamemode.Creative, 0, 0, "default", true), this.MinecraftStream);
this.Logger.LogDebug("Sent Join Game packet.");
await PacketHandler.CreateAsync(new SpawnPosition(new Position(0, 100, 0)), this.MinecraftStream);
this.Logger.LogDebug("Sent Spawn Position packet.");
await PacketHandler.CreateAsync(new PlayerPositionLook(new Transform(0, 105, 0), PositionFlags.NONE, 0), this.MinecraftStream);
this.Logger.LogDebug("Sent Position packet.");
using (var stream = new MinecraftStream())
{
await stream.WriteStringAsync("obsidian");
await PacketHandler.CreateAsync(new PluginMessage("minecraft:brand", stream.ToArray()), this.MinecraftStream);
}
this.Logger.LogDebug("Sent server brand.");
this.OriginServer.Broadcast(string.Format(this.Config.JoinMessage, this.Player.Username));
await this.OriginServer.Events.InvokePlayerJoin(new PlayerJoinEventArgs(this, DateTimeOffset.Now));
await this.SendDeclareCommandsAsync();
await this.SendPlayerInfoAsync();
await this.SendPlayerListHeaderFooterAsync(string.IsNullOrWhiteSpace(OriginServer.Config.Header)?null : ChatMessage.Simple(OriginServer.Config.Header),
string.IsNullOrWhiteSpace(OriginServer.Config.Footer)?null : ChatMessage.Simple(OriginServer.Config.Footer));
this.Logger.LogDebug("Sent player list decoration");
await this.SendChunkAsync(OriginServer.WorldGenerator.GenerateChunk(new Chunk(0, 0)));
await this.SendChunkAsync(OriginServer.WorldGenerator.GenerateChunk(new Chunk(-1, 0)));
await this.SendChunkAsync(OriginServer.WorldGenerator.GenerateChunk(new Chunk(0, -1)));
await this.SendChunkAsync(OriginServer.WorldGenerator.GenerateChunk(new Chunk(-1, -1)));
//await OriginServer.world.resendBaseChunksAsync(10, 0, 0, 0, 0, this);
this.Logger.LogDebug("Sent chunk");
/*if (this.OriginServer.Config.OnlineMode)
* {
* await this.OriginServer.SendNewPlayer(this.PlayerId, this.Player.Uuid, new Transform
* {
* X = 0,
*
* Y = 105,
*
* Z = 0,
*
* Pitch = 1,
*
* Yaw = 1
* });
* }
* else
* {
* await this.OriginServer.SendNewPlayer(this.PlayerId, this.Player.Uuid3, new Transform
* {
* X = 0,
*
* Y = 105,
*
* Z = 0,
*
* Pitch = 1,
*
* Yaw = 1
* });
* }*/
}
internal async Task DisconnectAsync(ChatMessage reason)
{
await PacketHandler.CreateAsync(new Disconnect(reason, this.State), this.MinecraftStream);
}
private async Task <Packet> GetNextPacketAsync()
{
return(await PacketHandler.ReadFromStreamAsync(this.MinecraftStream));
}
public async Task StartConnectionAsync()
{
while (!Cancellation.IsCancellationRequested && this.Tcp.Connected)
{
Packet packet = this.Compressed ? await this.GetNextCompressedPacketAsync() : await this.GetNextPacketAsync();
Packet returnPacket;
if (this.State == ClientState.Play && packet.PacketData.Length < 1)
{
this.Disconnect();
}
switch (this.State)
{
case ClientState.Status: //server ping/list
switch (packet.PacketId)
{
case 0x00:
var status = new ServerStatus(OriginServer);
await PacketHandler.CreateAsync(new RequestResponse(status), this.MinecraftStream);
break;
case 0x01:
await PacketHandler.CreateAsync(new PingPong(packet.PacketData), this.MinecraftStream);
this.Disconnect();
break;
}
break;
case ClientState.Handshaking:
if (packet.PacketId == 0x00)
{
if (packet == null)
{
throw new InvalidOperationException();
}
var handshake = await PacketHandler.CreateAsync(new Handshake(packet.PacketData));
var nextState = handshake.NextState;
if (nextState != ClientState.Status && nextState != ClientState.Login)
{
this.Logger.LogDebug($"Client sent unexpected state ({(int)nextState}), forcing it to disconnect");
await this.DisconnectAsync(Chat.ChatMessage.Simple("you seem suspicious"));
}
this.State = nextState;
this.Logger.LogMessage($"Handshaking with client (protocol: {handshake.Version}, server: {handshake.ServerAddress}:{handshake.ServerPort})");
}
else
{
//Handle legacy ping stuff
}
break;
case ClientState.Login:
switch (packet.PacketId)
{
default:
this.Logger.LogError("Client in state Login tried to send an unimplemented packet. Forcing it to disconnect.");
await this.DisconnectAsync(ChatMessage.Simple("Unknown Packet Id."));
break;
case 0x00:
var loginStart = await PacketHandler.CreateAsync(new LoginStart(packet.PacketData));
string username = loginStart.Username;
if (Config.MulitplayerDebugMode)
{
username = $"Player{new Random().Next(1, 999)}";
this.Logger.LogDebug($"Overriding username from {loginStart.Username} to {username}");
}
this.Logger.LogDebug($"Received login request from user {loginStart.Username}");
if (this.OriginServer.CheckPlayerOnline(username))
{
await this.OriginServer.Clients.FirstOrDefault(c => c.Player.Username == username).DisconnectAsync(Chat.ChatMessage.Simple("Logged in from another location"));
}
if (this.Config.OnlineMode)
{
var users = await MinecraftAPI.GetUsersAsync(new string[] { loginStart.Username });
var uid = users.FirstOrDefault();
var uuid = Guid.Parse(uid.Id);
this.Player = new Player(uuid, loginStart.Username, this);
PacketCryptography.GenerateKeyPair();
var pubKey = PacketCryptography.PublicKeyToAsn();
this.Token = PacketCryptography.GetRandomToken();
returnPacket = await PacketHandler.CreateAsync(new EncryptionRequest(pubKey, this.Token), this.MinecraftStream);
break;
}
this.Player = new Player(Guid.NewGuid(), username, this);
await ConnectAsync(this.Player.Uuid);
break;
case 0x01:
var encryptionResponse = await PacketHandler.CreateAsync(new EncryptionResponse(packet.PacketData));
JoinedResponse response;
this.SharedKey = PacketCryptography.Decrypt(encryptionResponse.SharedSecret);
var dec2 = PacketCryptography.Decrypt(encryptionResponse.VerifyToken);
var dec2Base64 = Convert.ToBase64String(dec2);
var tokenBase64 = Convert.ToBase64String(this.Token);
if (!dec2Base64.Equals(tokenBase64))
{
await this.DisconnectAsync(Chat.ChatMessage.Simple("Invalid token.."));
break;
}
var encodedKey = PacketCryptography.PublicKeyToAsn();
var serverId = PacketCryptography.MinecraftShaDigest(SharedKey.Concat(encodedKey).ToArray());
response = await MinecraftAPI.HasJoined(this.Player.Username, serverId);
if (response is null)
{
this.Logger.LogWarning($"Failed to auth {this.Player.Username}");
await this.DisconnectAsync(Chat.ChatMessage.Simple("Unable to authenticate.."));
break;
}
this.EncryptionEnabled = true;
this.MinecraftStream = new AesStream(this.Tcp.GetStream(), this.SharedKey);
await ConnectAsync(new Guid(response.Id));
break;
case 0x02:
// Login Plugin Response
break;
}
break;
case ClientState.Play:
///this.Logger.LogDebugAsync($"Received Play packet with Packet ID 0x{packet.PacketId.ToString("X")}");
await PacketHandler.HandlePlayPackets(packet, this);
break;
}
}
Logger.LogMessage($"Disconnected client");
if (this.IsPlaying)
{
await this.OriginServer.Events.InvokePlayerLeave(new PlayerLeaveEventArgs(this));
}
this.OriginServer.Broadcast(string.Format(this.Config.LeaveMessage, this.Player.Username));
this.Player = null;
if (Tcp.Connected)
{
this.Tcp.Close();
}
}
internal async Task SendPlayerListHeaderFooterAsync(ChatMessage header, ChatMessage footer)
{
await PacketHandler.CreateAsync(new PlayerListHeaderFooter(header, footer), this.MinecraftStream);
this.Logger.LogDebug("Sent Player List Footer Header packet.");
}
internal async Task SendDeclareCommandsAsync()
{
var packet = new DeclareCommands();
var node = new CommandNode()
{
Type = CommandNodeType.Root
};
foreach (Qmmands.Command command in this.OriginServer.Commands.GetAllCommands())
{
var commandNode = new CommandNode()
{
Name = command.Name,
Type = CommandNodeType.Literal
};
foreach (Qmmands.Parameter parameter in command.Parameters)
{
var parameterNode = new CommandNode()
{
Name = parameter.Name,
Type = CommandNodeType.Argument,
};
Type type = parameter.Type;
if (type == typeof(string))
{
parameterNode.Parser = new StringCommandParser(parameter.IsRemainder ? StringType.GreedyPhrase : StringType.QuotablePhrase);
}
else if (type == typeof(double))
{
parameterNode.Parser = new EmptyFlagsCommandParser("brigadier:double");
}
else if (type == typeof(float))
{
parameterNode.Parser = new EmptyFlagsCommandParser("brigadier:float");
}
else if (type == typeof(int))
{
parameterNode.Parser = new EmptyFlagsCommandParser("brigadier:integer");
}
else if (type == typeof(bool))
{
parameterNode.Parser = new CommandParser("brigadier:bool");
}
else
{
continue;
}
commandNode.Children.Add(parameterNode);
}
if (commandNode.Children.Count > 0)
{
commandNode.Children[0].Type |= CommandNodeType.IsExecutabe;
}
else
{
commandNode.Type |= CommandNodeType.IsExecutabe;
}
node.Children.Add(commandNode);
packet.AddNode(node);
}
await PacketHandler.CreateAsync(packet, this.MinecraftStream);
this.Logger.LogDebug("Sent Declare Commands packet.");
}
internal async Task SendEntity(EntityPacket packet)
{
await PacketHandler.CreateAsync(packet, this.MinecraftStream);
this.Logger.LogDebug($"Sent entity with id {packet.Id} for player {this.Player.Username}");
}
internal async Task SendSpawnMobAsync(int id, Guid uuid, int type, Transform transform, byte headPitch, Velocity velocity, Entity entity)
{
await PacketHandler.CreateAsync(new SpawnMob(id, uuid, type, transform, headPitch, velocity, entity), this.MinecraftStream);
this.Logger.LogDebug($"Spawned entity with id {id} for player {this.Player.Username}");
}
internal async Task SendPlayerLookPositionAsync(Transform poslook, PositionFlags posflags, int tpid = 0)
{
await PacketHandler.CreateAsync(new PlayerPositionLook(poslook, posflags, tpid), this.MinecraftStream);
}
