private void OnReceived(NetState state, ByteQueue buffer, out bool throttle) { throttle = false; GameClient client; if (!m_Clients.TryGetValue(state, out client)) { Logger.Error("Inconsistent game server state: game client for {0} not found", state); return; } if (!client.Seeded) { if (buffer.GetPacketID() == 0xEF) { client.Seeded = true; } else if (buffer.Length >= 4) { byte[] peek = new byte[4]; buffer.Dequeue(peek, 0, 4); int seed = (peek[0] << 24) | (peek[1] << 16) | (peek[2] << 8) | peek[3]; if (seed == 0) { Console.WriteLine("Login: {0}: Invalid client detected, disconnecting", client); client.Dispose(); return; } client.m_Seed = seed; client.Seeded = true; } else { return; // Need at least 4 bytes for the seed } } int length = buffer.Length; while (length > 0 && buffer.Length > 0) { int packetID = buffer.GetPacketID(); if (!client.SentFirstPacket && packetID != 0xF1 && packetID != 0xCF && packetID != 0x80 && packetID != 0x91 && packetID != 0xA4 && packetID != 0xEF) { Console.WriteLine("Client: {0}: Encrypted client detected, disconnecting", client); client.Dispose(); return; } PacketHandler handler = m_Handlers.GetHandler(packetID); if (handler == null) { byte[] data = new byte[length]; length = buffer.Dequeue(data, 0, length); if (Environment.Logging) { PacketReader reader = PacketReader.CreateInstance(data, length, false); reader.Trace(client); PacketReader.ReleaseInstance(reader); } return; } int packetLength = handler.Length; if (packetLength == 0) { // Dynamic length packet. Need at leaset 3 bytes (1 packet cmd + 2 length) if (length >= 3) { packetLength = buffer.GetPacketLength(); if (packetLength < 3) { client.Dispose(); return; } } else { break; } } if (length >= packetLength) { if (handler.Ingame && client.Mobile == null) { Console.WriteLine("Client: {0}: Sent ingame packet (0x{1:X2}) before having been attached to a mobile", client, packetID); client.Dispose(); return; } else if (handler.Ingame && client.Mobile.Deleted) { client.Dispose(); return; } else { ThrottlePacketCallback throttler = handler.ThrottleCallback; if (throttler != null && !throttler(client)) { throttle = true; return; } PacketProfile profile = PacketProfile.GetIncomingProfile(packetID); DateTime start = (profile == null ? DateTime.MinValue : DateTime.Now); byte[] packetBuffer; if (BufferSize >= packetLength) { packetBuffer = m_Buffers.AcquireBuffer(); } else { packetBuffer = new byte[packetLength]; } packetLength = buffer.Dequeue(packetBuffer, 0, packetLength); PacketReader reader = PacketReader.CreateInstance(packetBuffer, packetLength, handler.Length != 0); try { handler.OnReceive(client, reader); } catch (Exception e) { Logger.Error("Exception disarmed in HandleReceive from {0}: {1}", client.Address, e); } PacketReader.ReleaseInstance(reader); length = buffer.Length; if (BufferSize >= packetLength) { m_Buffers.ReleaseBuffer(packetBuffer); } if (profile != null) { profile.Record(packetLength, DateTime.Now - start); } } } else { break; } } }