private bool DecodePacket(BufferData data, out ushort length)
{
using (var br = data.GetReader(data.Offset, data.RemainingLength))
{
var rawPacket = new ProtocolPacket();
rawPacket.Read(br);
if (rawPacket.Channel != 0)
{
if (rawPacket.SequenceNumber < ReceiveSequence[rawPacket.Channel])
{
Debugger.Break();
length = rawPacket.Size; // throw away the packet
return(true);
}
ReceiveSequence[rawPacket.Channel] = rawPacket.SequenceNumber;
}
length = rawPacket.Size;
data.Offset += (int)br.BaseStream.Position;
if (rawPacket.Type == ClientMessageOpcode.None)
{
if (length != 4)
{
Debugger.Break(); // If it's not send timeout check, let's investigate...
}
return(true);
}
_packetQueue.EnqueueIncoming(rawPacket);
}
/*var packet = new PythonCallPacket(length);
* using (var br = data.GetReader())
* {
* packet.Read(br);
*
* if (packet.Return.HasValue)
* return packet.Return.Value;
*
* if (packet.Type == 2)
* {
* State = ClientState.LoggedIn;
* Entry = Server.AuthenticateClient(this, packet.AccountId, packet.OneTimeKey);
* if (Entry == null)
* {
* Logger.WriteLog(LogType.Error, "Client with ip: {0} tried to log in with invalid session data! User Id: {1} | OneTimeKey: {2}", Socket.RemoteAddress, packet.AccountId, packet.OneTimeKey);
* Close(false);
* return false;
* }
*
* CharacterManager.Instance.StartCharacterSelection(this);
* return true;
* }
*
* if (packet.DataSize > 0 && br.BaseStream.Position + packet.DataSize < br.BaseStream.Length)
* {
* if (br.ReadByte() != 0x4F) // 'O' format
* throw new Exception("Unsupported serialization format!");
*
* var packetType = PacketRouter.GetPacketType(packet.Opcode);
* if (packetType != null)
* {
* var pythonPacket = Activator.CreateInstance(packetType) as IBasePacket;
* if (pythonPacket == null)
* return false;
*
* pythonPacket.Read(br);
*
* Server.PacketQueue.EnqueueIncoming(this, pythonPacket);
* }
* else
* Logger.WriteLog(LogType.Error, $"Unhandled game opcode: {packet.Opcode}");
* }
* else
* Logger.WriteLog(LogType.Error, $"Invalid data found in Python method call! Off: {br.BaseStream.Position} | Len: {packet.DataSize} | Array len: {br.BaseStream.Length}");
* }*/
return(true);
}
private bool DecodePacket(BufferData data, out ushort length)
{
using (var br = data.GetReader(data.Offset, data.RemainingLength))
{
var rawPacket = new ProtocolPacket();
rawPacket.Read(br);
if (rawPacket.Channel != 0)
{
if (rawPacket.SequenceNumber < ReceiveSequence[rawPacket.Channel])
{
Debugger.Break();
length = rawPacket.Size; // throw away the packet
return(true);
}
ReceiveSequence[rawPacket.Channel] = rawPacket.SequenceNumber;
}
length = rawPacket.Size;
data.Offset += (int)br.BaseStream.Position;
switch (rawPacket.Type)
{
case ClientMessageOpcode.None: // Send timeout check
if (length != 4)
{
Debugger.Break(); // If it's not send timeout check, let's investigate...
}
return(true);
case ClientMessageOpcode.Login:
var loginMsg = rawPacket.Message as LoginMessage;
if (loginMsg == null)
{
Close(false);
return(false);
}
if (loginMsg.Version.Length != 8 || loginMsg.Version != "1.16.5.0")
{
Logger.WriteLog(LogType.Error, $"Client version mismatch: Server: 1.16.5.0 | Client: {loginMsg.Version}");
SendMessage(new LoginResponseMessage
{
ErrorCode = LoginErrorCodes.VersionMismatch,
Subtype = LoginResponseMessageSubtype.Failed
});
Close(false);
return(false);
}
Entry = Server.AuthenticateClient(this, loginMsg.AccountId, loginMsg.OneTimeKey); // TODO: implement ban system and check if the account is banned
if (Entry == null)
{
Logger.WriteLog(LogType.Error, "Client with ip: {0} tried to log in with invalid session data! User Id: {1} | OneTimeKey: {2}", Socket.RemoteAddress, loginMsg.AccountId, loginMsg.OneTimeKey);
SendMessage(new LoginResponseMessage
{
ErrorCode = LoginErrorCodes.AuthenticationFailed,
Subtype = LoginResponseMessageSubtype.Failed
});
Close(false);
return(false);
}
SendMessage(new LoginResponseMessage
{
AccountId = loginMsg.AccountId,
Subtype = LoginResponseMessageSubtype.Success
});
State = ClientState.LoggedIn;
CharacterManager.Instance.StartCharacterSelection(this);
return(true);
case ClientMessageOpcode.Move:
break;
case ClientMessageOpcode.CallServerMethod:
break;
case ClientMessageOpcode.Ping:
break;
}
}
/*var packet = new PythonCallPacket(length);
* using (var br = data.GetReader())
* {
* packet.Read(br);
*
* if (packet.Return.HasValue)
* return packet.Return.Value;
*
* if (packet.Type == 2)
* {
* State = ClientState.LoggedIn;
* Entry = Server.AuthenticateClient(this, packet.AccountId, packet.OneTimeKey);
* if (Entry == null)
* {
* Logger.WriteLog(LogType.Error, "Client with ip: {0} tried to log in with invalid session data! User Id: {1} | OneTimeKey: {2}", Socket.RemoteAddress, packet.AccountId, packet.OneTimeKey);
* Close(false);
* return false;
* }
*
* CharacterManager.Instance.StartCharacterSelection(this);
* return true;
* }
*
* if (packet.DataSize > 0 && br.BaseStream.Position + packet.DataSize < br.BaseStream.Length)
* {
* if (br.ReadByte() != 0x4F) // 'O' format
* throw new Exception("Unsupported serialization format!");
*
* var packetType = PacketRouter.GetPacketType(packet.Opcode);
* if (packetType != null)
* {
* var pythonPacket = Activator.CreateInstance(packetType) as IBasePacket;
* if (pythonPacket == null)
* return false;
*
* pythonPacket.Read(br);
*
* Server.PacketQueue.EnqueueIncoming(this, pythonPacket);
* }
* else
* Logger.WriteLog(LogType.Error, $"Unhandled game opcode: {packet.Opcode}");
* }
* else
* Logger.WriteLog(LogType.Error, $"Invalid data found in Python method call! Off: {br.BaseStream.Position} | Len: {packet.DataSize} | Array len: {br.BaseStream.Length}");
* }*/
return(true);
}
