internal void HandleOfflineRakMessage(ReadOnlyMemory <byte> receiveBytes, IPEndPoint senderEndpoint)
{
byte messageId = receiveBytes.Span[0];
var messageType = (DefaultMessageIdTypes)messageId;
// Increase fast, decrease slow on 1s ticks.
if (_connectionInfo.NumberOfPlayers < _connectionInfo.RakSessions.Count)
{
_connectionInfo.NumberOfPlayers = _connectionInfo.RakSessions.Count;
}
// Shortcut to reply fast, and no parsing
if (messageType == DefaultMessageIdTypes.ID_OPEN_CONNECTION_REQUEST_1)
{
if (!_greyListManager.AcceptConnection(senderEndpoint.Address))
{
var noFree = NoFreeIncomingConnections.CreateObject();
var bytes = noFree.Encode();
TraceSend(noFree);
noFree.PutPool();
_sender.SendData(bytes, senderEndpoint);
Interlocked.Increment(ref _connectionInfo.NumberOfDeniedConnectionRequestsPerSecond);
return;
}
}
Packet message = null;
try
{
try
{
message = PacketFactory.Create(messageId, receiveBytes, "raknet");
}
catch (Exception)
{
message = null;
}
if (message == null)
{
_greyListManager.Blacklist(senderEndpoint.Address);
Log.Error($"Receive bad packet with ID: {messageId} (0x{messageId:x2}) {messageType} from {senderEndpoint.Address}");
return;
}
TraceReceive(Log, message);
switch (messageType)
{
case DefaultMessageIdTypes.ID_NO_FREE_INCOMING_CONNECTIONS:
// Stop this client connection
_connection.Stop();
break;
case DefaultMessageIdTypes.ID_UNCONNECTED_PING:
case DefaultMessageIdTypes.ID_UNCONNECTED_PING_OPEN_CONNECTIONS:
HandleRakNetMessage(senderEndpoint, (UnconnectedPing)message);
break;
case DefaultMessageIdTypes.ID_UNCONNECTED_PONG:
HandleRakNetMessage(senderEndpoint, (UnconnectedPong)message);
break;
case DefaultMessageIdTypes.ID_OPEN_CONNECTION_REQUEST_1:
HandleRakNetMessage(senderEndpoint, (OpenConnectionRequest1)message);
break;
case DefaultMessageIdTypes.ID_OPEN_CONNECTION_REPLY_1:
HandleRakNetMessage(senderEndpoint, (OpenConnectionReply1)message);
break;
case DefaultMessageIdTypes.ID_OPEN_CONNECTION_REQUEST_2:
HandleRakNetMessage(senderEndpoint, (OpenConnectionRequest2)message);
break;
case DefaultMessageIdTypes.ID_OPEN_CONNECTION_REPLY_2:
HandleRakNetMessage(senderEndpoint, (OpenConnectionReply2)message);
break;
default:
_greyListManager.Blacklist(senderEndpoint.Address);
if (Log.IsInfoEnabled)
{
Log.Error($"Receive unexpected packet with ID: {messageId} (0x{messageId:x2}) {messageType} from {senderEndpoint.Address}");
}
break;
}
}
finally
{
message?.PutPool();
}
}
