Esempio n. 1
0
        void IoLoop()
        {
            short  x, y, h;
            byte   mode, type, opcode;
            Packet packet;

            int pollInterval = 200;
            int pollCounter  = 0;
            int packetsSent  = 0;

            try {
                LoginSequence();
                canSend = true;

                while (!canDispose)
                {
                    Thread.Sleep(1);
                    packetsSent = 0;

                    // detect player disconnect
                    if (pollCounter > pollInterval)
                    {
                        if (!client.Connected ||
                            (client.Client.Poll(1000, SelectMode.SelectRead) && client.Client.Available == 0))
                        {
                            world.log.Log("Session.IoLoop: Lost connection to {0}.", LogType.Debug, player.name);
                            return;
                        }
                        pollCounter = 0;
                    }
                    pollCounter++;

                    // send priority output to player
                    while (canSend && priorityOutputQueue.Count > 0 && packetsSent < Server.maxSessionPacketsPerTick)
                    {
                        lock ( priorityQueueLock ) {
                            packet = priorityOutputQueue.Dequeue();
                        }
                        writer.Write(packet.data);
                        packetsSent++;
                        if (packet.data[0] == (byte)OutputCodes.Disconnect)
                        {
                            world.log.Log("Session.IoLoop: Kick packet delivered to {0}.", LogType.Debug, player.name);
                            return;
                        }
                    }

                    // send output to player
                    while (canSend && outputQueue.Count > 0 && packetsSent < Server.maxSessionPacketsPerTick)
                    {
                        lock ( queueLock ) {
                            packet = outputQueue.Dequeue();
                        }
                        writer.Write(packet.data);
                        packetsSent++;
                        if (packet.data[0] == (byte)OutputCodes.Disconnect)
                        {
                            writer.Flush();
                            world.log.Log("Session.IoLoop: Kick packet delivered to {0}.", LogType.Debug, player.name);
                            return;
                        }
                    }

                    // get input from player
                    while (canReceive && client.GetStream().DataAvailable)
                    {
                        opcode = reader.ReadByte();
                        switch ((InputCodes)opcode)
                        {
                        // Message
                        case InputCodes.Message:
                            reader.ReadByte();
                            string message = ReadString();
                            if (Player.CheckForIllegalChars(message))
                            {
                                world.log.Log("Player.ParseMessage: {0} attempted to write illegal characters in chat and was kicked.",
                                              LogType.SuspiciousActivity,
                                              player.name);
                                KickNow("Illegal characters in chat.");
                                return;
                            }
                            else
                            {
                                player.ParseMessage(message, false);
                            }
                            break;

                        // Player movement
                        case InputCodes.MoveRotate:
                            reader.ReadByte();
                            Position newPos = new Position();
                            newPos.x = IPAddress.NetworkToHostOrder(reader.ReadInt16());
                            newPos.h = IPAddress.NetworkToHostOrder(reader.ReadInt16());
                            newPos.y = IPAddress.NetworkToHostOrder(reader.ReadInt16());
                            newPos.r = reader.ReadByte();
                            newPos.l = reader.ReadByte();

                            if (newPos.h < 0 || newPos.x < -32 || newPos.x >= world.map.widthX * 32 + 32 || newPos.y < -32 || newPos.y > world.map.widthY * 32 + 32)
                            {
                                world.log.Log(player.name + " was kicked for moving out of map boundaries.", LogType.SuspiciousActivity);
                                world.SendToAll(player.name + " was kicked for moving out of map boundaries.", null);
                                KickNow("Hacking detected: out of map boundaries.");
                                return;
                            }

                            Position delta = new Position(), oldPos = player.pos;
                            bool     posChanged, rotChanged;

                            if (!player.isHidden)
                            {
                                delta.Set(newPos.x - oldPos.x, newPos.y - oldPos.y, newPos.h - oldPos.h, newPos.r, newPos.l);
                                posChanged = delta.x != 0 || delta.y != 0 || delta.h != 0;
                                rotChanged = newPos.r != oldPos.r || newPos.l != oldPos.l;

                                if (player.isFrozen)
                                {
                                    if (rotChanged)
                                    {
                                        world.SendToAll(PacketWriter.MakeRotate(player.id, newPos), player);
                                        player.pos.r = newPos.r;
                                        player.pos.l = newPos.l;
                                    }
                                    if (posChanged)
                                    {
                                        SendNow(PacketWriter.MakeTeleport(255, player.pos));
                                    }
                                }
                                else
                                {
                                    if (delta.FitsIntoByte() && fullPositionUpdateCounter < fullPositionUpdateInterval)
                                    {
                                        if (posChanged && rotChanged)
                                        {
                                            world.SendToAll(PacketWriter.MakeMoveRotate(player.id, delta), player);
                                        }
                                        else if (posChanged)
                                        {
                                            world.SendToAll(PacketWriter.MakeMove(player.id, delta), player);
                                        }
                                        else if (rotChanged)
                                        {
                                            world.SendToAll(PacketWriter.MakeRotate(player.id, newPos), player);
                                        }
                                    }
                                    else if (!delta.IsZero() && !player.isFrozen)
                                    {
                                        world.SendToAll(PacketWriter.MakeTeleport(player.id, newPos), player);
                                    }
                                    player.pos = newPos;
                                    if (player.isDummySpamming)
                                    {
                                        world.cmd.standardCommands.Dummy(player, new Command("/dummy " + player.name));
                                    }
                                }

                                fullPositionUpdateCounter++;
                                if (fullPositionUpdateCounter >= fullPositionUpdateInterval)
                                {
                                    fullPositionUpdateCounter = 0;
                                }
                            }
                            break;

                        // Set tile
                        case InputCodes.SetTile:
                            x    = IPAddress.NetworkToHostOrder(reader.ReadInt16());
                            h    = IPAddress.NetworkToHostOrder(reader.ReadInt16());
                            y    = IPAddress.NetworkToHostOrder(reader.ReadInt16());
                            mode = reader.ReadByte();
                            type = reader.ReadByte();
                            if (type > 49 || x < 0 || x > world.map.widthX || y < 0 || y > world.map.widthY || h < 0 || h > world.map.height)
                            {
                                world.log.Log(player.name + " was kicked for sending bad SetTile packets.", LogType.SuspiciousActivity);
                                world.SendToAll(player.name + " was kicked for sending bad SetTile packets.", null);
                                KickNow("Hacking detected: illegal SetTile packet.");
                                return;
                            }
                            else
                            {
                                player.SetTile(x, y, h, mode == 1, (Block)type);
                            }
                            break;
                        }
                    }
                }
            } catch (ThreadAbortException) {
                world.log.Log("Session.IoLoop: Thread aborted!", LogType.Error);
            } catch (IOException ex) {
                world.log.Log("Session.IoLoop: {0}.", LogType.Warning, ex.Message);
            } catch (SocketException ex) {
                world.log.Log("Session.IoLoop: {0}.", LogType.Warning, ex.Message);
            } catch (Exception ex) {
                world.log.Log("Session.IoLoop: {0}: {1}.", LogType.Error, ex.ToString(), ex.Message);
            } finally {
                canQueue   = false;
                canSend    = false;
                canDispose = true;
            }
        }