private static async Task ParsePacket(BinaryReader reader)
{
var dataType = (RecordedPacketType)reader.ReadByte();
// Read client id.
var clientId = reader.ReadInt32();
switch (dataType)
{
case RecordedPacketType.Connect:
// Read data.
var addressLength = reader.ReadByte();
var addressBytes = reader.ReadBytes(addressLength);
var addressPort = reader.ReadUInt16();
var address = new IPEndPoint(new IPAddress(addressBytes), addressPort);
var name = reader.ReadString();
// Create and register connection.
var connection = new MockHazelConnection(address);
await _clientManager.RegisterConnectionAsync(connection, name, 50516550, null);
// Store reference for ourselfs.
Connections.Add(clientId, connection);
break;
case RecordedPacketType.Disconnect:
string reason = null;
if (reader.BaseStream.Position < reader.BaseStream.Length)
{
reason = reader.ReadString();
}
await Connections[clientId].Client !.HandleDisconnectAsync(reason);
Connections.Remove(clientId);
break;
case RecordedPacketType.Message:
{
var messageType = (MessageType)reader.ReadByte();
var tag = reader.ReadByte();
var length = reader.ReadInt32();
var buffer = reader.ReadBytes(length);
using var message = _readerPool.Get();
message.Update(buffer, tag: tag);
if (tag == MessageFlags.HostGame)
{
GameOptions.Add(clientId, Message00HostGameC2S.Deserialize(message));
}
else if (Connections.TryGetValue(clientId, out var client))
{
await client.Client !.HandleMessageAsync(message, messageType);
}
break;
}
case RecordedPacketType.GameCreated:
_gameCodeFactory.Result = GameCode.From(reader.ReadString());
await _gameManager.CreateAsync(GameOptions[clientId]);
GameOptions.Remove(clientId);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
public override async ValueTask HandleMessageAsync(IMessageReader reader, MessageType messageType)
{
byte flag = reader.Tag;
_logger.LogTrace("[{0}] Server got {1}.", Id, flag);
switch (flag)
{
case MessageFlags.HostGame:
{
// Read game settings.
GameOptionsData gameInfo = Message00HostGameC2S.Deserialize(reader, out _);
// Create game.
IGame?game = await _gameManager.CreateAsync(this, gameInfo);
if (game == null)
{
await DisconnectAsync(DisconnectReason.GameMissing);
return;
}
// Code in the packet below will be used in JoinGame.
using (var writer = MessageWriter.Get(MessageType.Reliable))
{
Message00HostGameS2C.Serialize(writer, game.Code);
await Connection.SendAsync(writer);
}
break;
}
case MessageFlags.JoinGame:
{
Message01JoinGameC2S.Deserialize(reader, out GameCode gameCode);
Game?game = _gameManager.Find(gameCode);
if (game == null)
{
await DisconnectAsync(DisconnectReason.GameMissing);
return;
}
GameJoinResult result = await game.AddClientAsync(this);
switch (result.Error)
{
case GameJoinError.None:
break;
case GameJoinError.InvalidClient:
await DisconnectAsync(DisconnectReason.Custom, "Client is in an invalid state.");
break;
case GameJoinError.Banned:
await DisconnectAsync(DisconnectReason.Banned);
break;
case GameJoinError.GameFull:
await DisconnectAsync(DisconnectReason.GameFull);
break;
case GameJoinError.InvalidLimbo:
await DisconnectAsync(DisconnectReason.Custom, "Invalid limbo state while joining.");
break;
case GameJoinError.GameStarted:
await DisconnectAsync(DisconnectReason.GameStarted);
break;
case GameJoinError.GameDestroyed:
await DisconnectAsync(DisconnectReason.Custom, DisconnectMessages.Destroyed);
break;
case GameJoinError.Custom:
await DisconnectAsync(DisconnectReason.Custom, result.Message);
break;
default:
await DisconnectAsync(DisconnectReason.Custom, "Unknown error.");
break;
}
break;
}
case MessageFlags.StartGame:
{
if (!IsPacketAllowed(reader, true))
{
return;
}
await Player !.Game.HandleStartGame(reader);
break;
}
// No idea how this flag is triggered.
case MessageFlags.RemoveGame:
break;
case MessageFlags.RemovePlayer:
{
if (!IsPacketAllowed(reader, true))
{
return;
}
Message04RemovePlayerC2S.Deserialize(
reader,
out int playerId,
out byte reason);
await Player !.Game.HandleRemovePlayer(playerId, (DisconnectReason)reason);
break;
}
case MessageFlags.GameData:
case MessageFlags.GameDataTo:
{
if (!IsPacketAllowed(reader, false))
{
return;
}
bool toPlayer = flag == MessageFlags.GameDataTo;
int position = reader.Position;
bool verified = await Player !.Game.HandleGameDataAsync(reader, Player, toPlayer);
reader.Seek(position);
if (verified && Player != null)
{
// Broadcast packet to all other players.
using (var writer = MessageWriter.Get(messageType))
{
if (toPlayer)
{
int target = reader.ReadPackedInt32();
reader.CopyTo(writer);
await Player.Game.SendToAsync(writer, target);
}
else
{
reader.CopyTo(writer);
await Player.Game.SendToAllExceptAsync(writer, Id);
}
}
}
break;
}
case MessageFlags.EndGame:
{
if (!IsPacketAllowed(reader, true))
{
return;
}
Message08EndGameC2S.Deserialize(
reader,
out GameOverReason gameOverReason);
await Player !.Game.HandleEndGame(reader, gameOverReason);
break;
}
case MessageFlags.AlterGame:
{
if (!IsPacketAllowed(reader, true))
{
return;
}
Message10AlterGameC2S.Deserialize(
reader,
out AlterGameTags gameTag,
out bool value);
if (gameTag != AlterGameTags.ChangePrivacy)
{
return;
}
await Player !.Game.HandleAlterGame(reader, Player, value);
break;
}
case MessageFlags.KickPlayer:
{
if (!IsPacketAllowed(reader, true))
{
return;
}
Message11KickPlayerC2S.Deserialize(
reader,
out int playerId,
out bool isBan);
await Player !.Game.HandleKickPlayer(playerId, isBan);
break;
}
case MessageFlags.GetGameListV2:
{
Message16GetGameListC2S.Deserialize(reader, out var options, out _);
await OnRequestGameListAsync(options);
break;
}
default:
if (_customMessageManager.TryGet(flag, out var customRootMessage))
{
await customRootMessage.HandleMessageAsync(this, reader, messageType);
break;
}
_logger.LogWarning("Server received unknown flag {0}.", flag);
break;
}
#if DEBUG
if (flag != MessageFlags.GameData &&
flag != MessageFlags.GameDataTo &&
flag != MessageFlags.EndGame &&
reader.Position < reader.Length)
{
_logger.LogWarning(
"Server did not consume all bytes from {0} ({1} < {2}).",
flag,
reader.Position,
reader.Length);
}
#endif
}
public override async ValueTask HandleMessageAsync(IMessageReader reader, MessageType messageType)
{
var flag = reader.Tag;
_logger.LogTrace("[{0}] Server got {1}.", Id, flag);
switch (flag)
{
case MessageFlags.HostGame:
{
// Read game settings.
var gameInfo = Message00HostGameC2S.Deserialize(reader);
// Create game.
var game = await _gameManager.CreateAsync(gameInfo);
// Code in the packet below will be used in JoinGame.
using (var writer = MessageWriter.Get(MessageType.Reliable))
{
Message00HostGameS2C.Serialize(writer, game.Code);
await Connection.SendAsync(writer);
}
break;
}
case MessageFlags.JoinGame:
{
Message01JoinGameC2S.Deserialize(
reader,
out var gameCode,
out _);
var game = _gameManager.Find(gameCode);
if (game == null)
{
await DisconnectAsync(DisconnectReason.GameMissing);
return;
}
var result = await game.AddClientAsync(this);
switch (result.Error)
{
case GameJoinError.None:
break;
case GameJoinError.InvalidClient:
await DisconnectAsync(DisconnectReason.Custom, "Client is in an invalid state.");
break;
case GameJoinError.Banned:
await DisconnectAsync(DisconnectReason.Banned);
break;
case GameJoinError.GameFull:
await DisconnectAsync(DisconnectReason.GameFull);
break;
case GameJoinError.InvalidLimbo:
await DisconnectAsync(DisconnectReason.Custom, "Invalid limbo state while joining.");
break;
case GameJoinError.GameStarted:
await DisconnectAsync(DisconnectReason.GameStarted);
break;
case GameJoinError.GameDestroyed:
await DisconnectAsync(DisconnectReason.Custom, DisconnectMessages.Destroyed);
break;
case GameJoinError.Custom:
await DisconnectAsync(DisconnectReason.Custom, result.Message);
break;
default:
await DisconnectAsync(DisconnectReason.Custom, "Unknown error.");
break;
}
break;
}
case MessageFlags.StartGame:
{
if (!IsPacketAllowed(reader, true))
{
return;
}
await Player.Game.HandleStartGame(reader);
break;
}
// No idea how this flag is triggered.
case MessageFlags.RemoveGame:
break;
case MessageFlags.RemovePlayer:
{
if (!IsPacketAllowed(reader, true))
{
return;
}
Message04RemovePlayerC2S.Deserialize(
reader,
out var playerId,
out var reason);
await Player.Game.HandleRemovePlayer(playerId, (DisconnectReason)reason);
break;
}
case MessageFlags.GameData:
case MessageFlags.GameDataTo:
{
if (!IsPacketAllowed(reader, false))
{
return;
}
var toPlayer = flag == MessageFlags.GameDataTo;
// Handle packet.
using var readerCopy = reader.Copy();
// TODO: Return value, either a bool (to cancel) or a writer (to cancel (null) or modify/overwrite).
try
{
var verified = await Player.Game.HandleGameDataAsync(readerCopy, Player, toPlayer);
if (verified)
{
// Broadcast packet to all other players.
using (var writer = MessageWriter.Get(messageType))
{
if (toPlayer)
{
var target = reader.ReadPackedInt32();
reader.CopyTo(writer);
await Player.Game.SendToAsync(writer, target);
}
else
{
reader.CopyTo(writer);
await Player.Game.SendToAllExceptAsync(writer, Id);
}
}
}
}
catch (ImpostorCheatException e)
{
if (_antiCheatConfig.BanIpFromGame)
{
Player.Game.BanIp(Connection.EndPoint.Address);
}
await DisconnectAsync(DisconnectReason.Hacking, e.Message);
}
break;
}
case MessageFlags.EndGame:
{
if (!IsPacketAllowed(reader, true))
{
return;
}
Message08EndGameC2S.Deserialize(
reader,
out var gameOverReason);
await Player.Game.HandleEndGame(reader, gameOverReason);
break;
}
case MessageFlags.AlterGame:
{
if (!IsPacketAllowed(reader, true))
{
return;
}
Message10AlterGameC2S.Deserialize(
reader,
out var gameTag,
out var value);
if (gameTag != AlterGameTags.ChangePrivacy)
{
return;
}
await Player.Game.HandleAlterGame(reader, Player, value);
break;
}
case MessageFlags.KickPlayer:
{
if (!IsPacketAllowed(reader, true))
{
return;
}
Message11KickPlayerC2S.Deserialize(
reader,
out var playerId,
out var isBan);
await Player.Game.HandleKickPlayer(playerId, isBan);
break;
}
case MessageFlags.GetGameListV2:
{
Message16GetGameListC2S.Deserialize(reader, out var options);
await OnRequestGameListAsync(options);
break;
}
default:
_logger.LogWarning("Server received unknown flag {0}.", flag);
break;
}
#if DEBUG
if (flag != MessageFlags.GameData &&
flag != MessageFlags.GameDataTo &&
flag != MessageFlags.EndGame &&
reader.Position < reader.Length)
{
_logger.LogWarning(
"Server did not consume all bytes from {0} ({1} < {2}).",
flag,
reader.Position,
reader.Length);
}
#endif
}