/// <summary>
 /// Default constructor
 /// </summary>
 /// <param name="client">Reference to the client this packet is destined for</param>
 /// <param name="buffer">Serialized packet data. If the flags or sequence number
 /// need to be updated, they will be injected directly into this binary buffer</param>
 /// <param name="category">Throttling category for this packet</param>
 public OutgoingPacket(LLUDPClient client, UDPPacketBuffer buffer, ThrottleOutPacketType category, UnackedPacketMethod method)
 {
     Client = client;
     Buffer = buffer;
     Category = category;
     UnackedMethod = method;
 }

        private void AsyncBeginReceive()
        {
            lock (typeof(Constants))
            {
                if (!Constants.isClosing)
                {
                    // allocate a packet buffer
                    UDPPacketBuffer buf = new UDPPacketBuffer();

                    try
                    {
                        // kick off an async read
                        udpSocket.BeginReceiveFrom(
                            buf.Data,
                            0,
                            UDPPacketBuffer.BUFFER_SIZE,
                            SocketFlags.None,
                            ref buf.RemoteEndPoint,
                            new AsyncCallback(AsyncEndReceive),
                            buf);
                    }
                    catch (SocketException se)
                    {
                        txtReceive.Text = se.Message + System.Environment.NewLine + txtReceive.Text;
                    }
                }
            }
        }

 /// <summary>
 /// Default constructor
 /// </summary>
 /// <param name="client">Reference to the client this packet is destined for</param>
 /// <param name="buffer">Serialized packet data. If the flags or sequence number
 /// need to be updated, they will be injected directly into this binary buffer</param>
 /// <param name="category">Throttling category for this packet</param>
 /// <param name="resendMethod">The delegate to be called if this packet is determined to be unacknowledged</param>
 /// <param name="finishedMethod">The delegate to be called when this packet is sent</param>
 public OutgoingPacket(LLUDPClient client, UDPPacketBuffer buffer,
     ThrottleOutPacketType category, UnackedPacketMethod resendMethod,
     UnackedPacketMethod finishedMethod, Packet packet)
 {
     Client = client;
     Buffer = buffer;
     Category = category;
     UnackedMethod = resendMethod;
     FinishedMethod = finishedMethod;
     Packet = packet;
 }

        public void SendPacketData(byte[] data, int dataLength, PacketType type, bool doZerocode)
        {
            UDPPacketBuffer buffer = new UDPPacketBuffer(remoteEndPoint, Packet.MTU);

            // Zerocode if needed
            if (doZerocode)
            {
                try { dataLength = Helpers.ZeroEncode(data, dataLength, buffer.Data); }
                catch (IndexOutOfRangeException)
                {
                    // The packet grew larger than Packet.MTU bytes while zerocoding.
                    // Remove the MSG_ZEROCODED flag and send the unencoded data
                    // instead
                    data[0] = (byte)(data[0] & ~Helpers.MSG_ZEROCODED);
                    Buffer.BlockCopy(data, 0, buffer.Data, 0, dataLength);
                }
            }
            else
            {
                Buffer.BlockCopy(data, 0, buffer.Data, 0, dataLength);
            }
            buffer.DataLength = dataLength;

            #region Queue or Send

            NetworkManager.OutgoingPacket outgoingPacket = new NetworkManager.OutgoingPacket(this, buffer);

            // Send ACK and logout packets directly, everything else goes through the queue
            if (Client.Settings.THROTTLE_OUTGOING_PACKETS == false ||
                type == PacketType.PacketAck ||
                type == PacketType.LogoutRequest)
            {
                SendPacketFinal(outgoingPacket);
            }
            else
            {
                Network.PacketOutbox.Enqueue(outgoingPacket);
            }

            #endregion Queue or Send

            #region Stats Tracking
            if (Client.Settings.TRACK_UTILIZATION)
            {
                Client.Stats.Update(type.ToString(), OpenMetaverse.Stats.Type.Packet, dataLength, 0);
            }
            #endregion
        }

 protected override void PacketSent(UDPPacketBuffer buffer, int bytesSent)
 {
     // Stats tracking
     Interlocked.Add(ref Stats.SentBytes, bytesSent);
     Interlocked.Increment(ref Stats.SentPackets);
     
     Client.Network.RaisePacketSentEvent(buffer.Data, bytesSent, this);
 }

 protected abstract void PacketSent(UDPPacketBuffer buffer, int bytesSent);

        public void AsyncBeginSend(UDPPacketBuffer buf)
        {
            rwLock.AcquireReaderLock(-1);

            if (!shutdownFlag)
            {
                try
                {
                    Interlocked.Increment(ref rwOperationCount);
                    udpSocket.BeginSendTo(
                        buf.Data,
                        0,
                        buf.DataLength,
                        SocketFlags.None,
                        buf.RemoteEndPoint,
                        new AsyncCallback(AsyncEndSend),
                        buf);
                }
                catch (SocketException)
                {
                    //Logger.Log(
                    //    "A SocketException occurred in UDPServer.AsyncBeginSend()",
                    //    Helpers.LogLevel.Error, se);
                }
            }

            rwLock.ReleaseReaderLock();
        }

        public virtual void SendAckImmediate(IPEndPoint remoteEndpoint, PacketAckPacket ack)
        {
            byte[] packetData = ack.ToBytes();
            int length = packetData.Length;

            UDPPacketBuffer buffer = new UDPPacketBuffer(remoteEndpoint, length);
            buffer.DataLength = length;

            Buffer.BlockCopy(packetData, 0, buffer.Data, 0, length);

            AsyncBeginSend(buffer);
        }

        private void SendAckImmediate(IPEndPoint remoteEndpoint, uint sequenceNumber)
        {
            PacketAckPacket ack = new PacketAckPacket();
            ack.Header.Reliable = false;
            ack.Packets = new PacketAckPacket.PacketsBlock[1];
            ack.Packets[0] = new PacketAckPacket.PacketsBlock();
            ack.Packets[0].ID = sequenceNumber;

            byte[] packetData = ack.ToBytes();
            int length = packetData.Length;

            UDPPacketBuffer buffer = new UDPPacketBuffer(remoteEndpoint, length);
            buffer.DataLength = length;

            Buffer.BlockCopy(packetData, 0, buffer.Data, 0, length);

            //            AsyncBeginSend(buffer);
            SyncSend(buffer);

        }

        private void AsyncBeginReceive()
        {
            // allocate a packet buffer
            //WrappedObject<UDPPacketBuffer> wrappedBuffer = Pool.CheckOut();
            UDPPacketBuffer buf = new UDPPacketBuffer();

            if (!m_shutdownFlag)
            {
                try
                {
                    // kick off an async read
                    m_udpSocket.BeginReceiveFrom(
                        //wrappedBuffer.Instance.Data,
                        buf.Data,
                        0,
                        UDPPacketBuffer.BUFFER_SIZE,
                        SocketFlags.None,
                        ref buf.RemoteEndPoint,
                        AsyncEndReceive,
                        //wrappedBuffer);
                        buf);
                }
                catch (SocketException e)
                {
                    if (e.SocketErrorCode == SocketError.ConnectionReset)
                    {
                        m_log.Warn("[UDPBASE]: SIO_UDP_CONNRESET was ignored, attempting to salvage the UDP listener on port " + m_udpPort);
                        bool salvaged = false;
                        while (!salvaged)
                        {
                            try
                            {
                                m_udpSocket.BeginReceiveFrom(
                                    //wrappedBuffer.Instance.Data,
                                    buf.Data,
                                    0,
                                    UDPPacketBuffer.BUFFER_SIZE,
                                    SocketFlags.None,
                                    ref buf.RemoteEndPoint,
                                    AsyncEndReceive,
                                    //wrappedBuffer);
                                    buf);
                                salvaged = true;
                            }
                            catch (SocketException) { }
                            catch (ObjectDisposedException) { return; }
                        }

                        m_log.Warn("[UDPBASE]: Salvaged the UDP listener on port " + m_udpPort);
                    }
                }
                catch (ObjectDisposedException) { }
            }
        }

 /// <summary>
 /// Called when the packet is built and this buffer is no longer in use
 /// </summary>
 /// <param name="buffer"></param>
 protected void PacketBuildingFinished(UDPPacketBuffer buffer)
 {
     buffer.ResetEndpoint();
     _recvBufferPool.ReturnObject(buffer);
 }

        public void SendPacketData(byte[] data, int dataLength, PacketType type, bool doZerocode)
        {
            UDPPacketBuffer buffer = new UDPPacketBuffer(remoteEndPoint, Packet.MTU);

            // Zerocode if needed
            if (doZerocode)
            {
                try { dataLength = Helpers.ZeroEncode(data, dataLength, buffer.Data); }
                catch (IndexOutOfRangeException)
                {
                    // The packet grew larger than Packet.MTU bytes while zerocoding.
                    // Remove the MSG_ZEROCODED flag and send the unencoded data
                    // instead
                    data[0] = (byte)(data[0] & ~Helpers.MSG_ZEROCODED);
                    Buffer.BlockCopy(data, 0, buffer.Data, 0, dataLength);
                }
            }
            else
            {
                Buffer.BlockCopy(data, 0, buffer.Data, 0, dataLength);
            }
            buffer.DataLength = dataLength;

            #region Queue or Send

            NetworkManager.OutgoingPacket outgoingPacket = new NetworkManager.OutgoingPacket(this, buffer);

            // Send ACK and logout packets directly, everything else goes through the queue
            if (Network.ThrottleOutgoingPackets == false ||
                type == PacketType.PacketAck ||
                type == PacketType.LogoutRequest)
            {
                SendPacketFinal(outgoingPacket);
            }
            else
            {
                Network.PacketOutbox.Enqueue(outgoingPacket);
            }

            #endregion Queue or Send
        }

 public void AsyncBeginSend(UDPPacketBuffer buf)
 {
     if (!m_shutdownFlag)
     {
         try
         {
             m_udpSocket.BeginSendTo(
                 buf.Data,
                 0,
                 buf.DataLength,
                 SocketFlags.None,
                 buf.RemoteEndPoint,
                 AsyncEndSend,
                 buf);
         }
         catch (SocketException) { }
         catch (ObjectDisposedException) { }
     }
 }

 public OutgoingPacket(Simulator simulator, UDPPacketBuffer buffer, PacketType type)
 {
     Simulator = simulator;
     Buffer = buffer;
     this.Type = type;
 }

        public void SendPacketData(LLUDPClient udpClient, byte[] data, Packet packet, ThrottleOutPacketType category, UnackedPacketMethod resendMethod, UnackedPacketMethod finishedMethod)
        {
            int dataLength = data.Length;
            bool doZerocode = (data[0] & Helpers.MSG_ZEROCODED) != 0;
            bool doCopy = true;

            // Frequency analysis of outgoing packet sizes shows a large clump of packets at each end of the spectrum.
            // The vast majority of packets are less than 200 bytes, although due to asset transfers and packet splitting
            // there are a decent number of packets in the 1000-1140 byte range. We allocate one of two sizes of data here
            // to accomodate for both common scenarios and provide ample room for ACK appending in both
            int bufferSize = dataLength * 2;

            UDPPacketBuffer buffer = new UDPPacketBuffer(udpClient.RemoteEndPoint, bufferSize);

            // Zerocode if needed
            if (doZerocode)
            {
                try
                {
                    dataLength = Helpers.ZeroEncode(data, dataLength, buffer.Data);
                    doCopy = false;
                }
                catch (IndexOutOfRangeException)
                {
                    // The packet grew larger than the bufferSize while zerocoding.
                    // Remove the MSG_ZEROCODED flag and send the unencoded data
                    // instead
                    m_log.Info("[LLUDPSERVER]: Packet exceeded buffer size during zerocoding for " + packet.Type + ". DataLength=" + dataLength +
                        " and BufferLength=" + buffer.Data.Length + ". Removing MSG_ZEROCODED flag");
                    data[0] = (byte)(data[0] & ~Helpers.MSG_ZEROCODED);
                }
            }

            // If the packet data wasn't already copied during zerocoding, copy it now
            if (doCopy)
            {
                if (dataLength <= buffer.Data.Length)
                {
                    Buffer.BlockCopy(data, 0, buffer.Data, 0, dataLength);
                }
                else
                {
                    bufferSize = dataLength;
                    buffer = new UDPPacketBuffer(udpClient.RemoteEndPoint, bufferSize);

                    // m_log.Error("[LLUDPSERVER]: Packet exceeded buffer size! This could be an indication of packet assembly not obeying the MTU. Type=" +
                    //     type + ", DataLength=" + dataLength + ", BufferLength=" + buffer.Data.Length + ". Dropping packet");
                    Buffer.BlockCopy(data, 0, buffer.Data, 0, dataLength);
                }
            }

            buffer.DataLength = dataLength;

            #region Queue or Send

            OutgoingPacket outgoingPacket = new OutgoingPacket(udpClient, buffer, category, resendMethod, finishedMethod, packet);

            if (!outgoingPacket.Client.EnqueueOutgoing(outgoingPacket))
                SendPacketFinal(outgoingPacket);

            #endregion Queue or Send
        }

        protected override void PacketReceived(UDPPacketBuffer buffer)
        {
            // Debugging/Profiling
            //try { Thread.CurrentThread.Name = "PacketReceived (" + m_scene.RegionInfo.RegionName + ")"; }
            //catch (Exception) { }

            LLUDPClient udpClient = null;
            Packet packet = null;
            int packetEnd = buffer.DataLength - 1;
            IPEndPoint address = (IPEndPoint)buffer.RemoteEndPoint;

            #region Decoding

            try
            {
                packet = Packet.BuildPacket(buffer.Data, ref packetEnd,
                    // Only allocate a buffer for zerodecoding if the packet is zerocoded
                    ((buffer.Data[0] & Helpers.MSG_ZEROCODED) != 0) ? new byte[4096] : null);
            }
            catch (MalformedDataException)
            {
            }

            // Fail-safe check
            if (packet == null)
            {
                m_log.ErrorFormat("[LLUDPSERVER]: Malformed data, cannot parse {0} byte packet from {1}:",
                    buffer.DataLength, buffer.RemoteEndPoint);
                m_log.Error(Utils.BytesToHexString(buffer.Data, buffer.DataLength, null));
                return;
            }

            #endregion Decoding

            #region Packet to Client Mapping

            // UseCircuitCode handling
            if (packet.Type == PacketType.UseCircuitCode)
            {
                object[] array = new object[] { buffer, packet };

                if (m_asyncPacketHandling)
                    Util.FireAndForget(HandleUseCircuitCode, array);
                else
                    HandleUseCircuitCode(array);

                return;
            }

            // Determine which agent this packet came from
            IClientAPI client;
            if (!m_scene.ClientManager.TryGetValue (address, out client) || !(client is LLClientView))
            {
                if(client != null)
                    m_log.Warn("[LLUDPSERVER]: Received a " + packet.Type + " packet from an unrecognized source: " + address + " in " + m_scene.RegionInfo.RegionName);
                return;
            }

            udpClient = ((LLClientView)client).UDPClient;

            if (!udpClient.IsConnected)
                return;

            #endregion Packet to Client Mapping

            // Stats tracking
            Interlocked.Increment(ref udpClient.PacketsReceived);

            int now = Environment.TickCount & Int32.MaxValue;
            udpClient.TickLastPacketReceived = now;

            #region ACK Receiving

            // Handle appended ACKs
            if (packet.Header.AppendedAcks && packet.Header.AckList != null)
            {
                for (int i = 0; i < packet.Header.AckList.Length; i++)
                    udpClient.NeedAcks.Acknowledge(packet.Header.AckList[i], now, packet.Header.Resent);
            }

            // Handle PacketAck packets
            if (packet.Type == PacketType.PacketAck)
            {
                PacketAckPacket ackPacket = (PacketAckPacket)packet;

                for (int i = 0; i < ackPacket.Packets.Length; i++)
                    udpClient.NeedAcks.Acknowledge(ackPacket.Packets[i].ID, now, packet.Header.Resent);

                // We don't need to do anything else with PacketAck packets
                return;
            }

            #endregion ACK Receiving

            #region ACK Sending

            if (packet.Header.Reliable)
            {
                udpClient.PendingAcks.Enqueue(packet.Header.Sequence);

//.........这里部分代码省略.........

 public void SyncSend(UDPPacketBuffer buf)
 {
     if (!m_shutdownFlag)
     {
         try
         {
             // well not async but blocking 
             m_udpSocket.SendTo(
                 buf.Data,
                 0,
                 buf.DataLength,
                 SocketFlags.None,
                 buf.RemoteEndPoint);
         }
         catch (SocketException) { }
         catch (ObjectDisposedException) { }
     }
 }

        public override void PacketReceived(UDPPacketBuffer buffer)
        {
            // Debugging/Profiling
            //try { Thread.CurrentThread.Name = "PacketReceived (" + m_scene.RegionInfo.RegionName + ")"; }
            //catch (Exception) { }
//            m_log.DebugFormat(
//                "[LLUDPSERVER]: Packet received from {0} in {1}", buffer.RemoteEndPoint, m_scene.RegionInfo.RegionName);

            LLUDPClient udpClient = null;
            Packet packet = null;
            int packetEnd = buffer.DataLength - 1;
            IPEndPoint endPoint = (IPEndPoint)buffer.RemoteEndPoint;

            #region Decoding

            if (buffer.DataLength < 7)
            {
//                m_log.WarnFormat(
//                    "[LLUDPSERVER]: Dropping undersized packet with {0} bytes received from {1} in {2}",
//                    buffer.DataLength, buffer.RemoteEndPoint, m_scene.RegionInfo.RegionName);

                RecordMalformedInboundPacket(endPoint);

                return; // Drop undersized packet
            }

            int headerLen = 7;
            if (buffer.Data[6] == 0xFF)
            {
                if (buffer.Data[7] == 0xFF)
                    headerLen = 10;
                else
                    headerLen = 8;
            }

            if (buffer.DataLength < headerLen)
            {
//                m_log.WarnFormat(
//                    "[LLUDPSERVER]: Dropping packet with malformed header received from {0} in {1}",
//                    buffer.RemoteEndPoint, m_scene.RegionInfo.RegionName);

                RecordMalformedInboundPacket(endPoint);

                return; // Malformed header
            }

            try
            {
//                packet = Packet.BuildPacket(buffer.Data, ref packetEnd,
//                    // Only allocate a buffer for zerodecoding if the packet is zerocoded
//                    ((buffer.Data[0] & Helpers.MSG_ZEROCODED) != 0) ? new byte[4096] : null);
                // If OpenSimUDPBase.UsePool == true (which is currently separate from the PacketPool) then we
                // assume that packet construction does not retain a reference to byte[] buffer.Data (instead, all
                // bytes are copied out).
                packet = PacketPool.Instance.GetPacket(buffer.Data, ref packetEnd,
                    // Only allocate a buffer for zerodecoding if the packet is zerocoded
                    ((buffer.Data[0] & Helpers.MSG_ZEROCODED) != 0) ? new byte[4096] : null);
            }
            catch (Exception e)
            {
                if (IncomingMalformedPacketCount < 100)
                    m_log.DebugFormat("[LLUDPSERVER]: Dropped malformed packet: " + e.ToString());
            }

            // Fail-safe check
            if (packet == null)
            {
                if (IncomingMalformedPacketCount < 100)
                {
                    m_log.WarnFormat("[LLUDPSERVER]: Malformed data, cannot parse {0} byte packet from {1}, data {2}:",
                        buffer.DataLength, buffer.RemoteEndPoint, Utils.BytesToHexString(buffer.Data, buffer.DataLength, null));
                }

                RecordMalformedInboundPacket(endPoint);

                return;
            }

            #endregion Decoding

            #region Packet to Client Mapping

            // UseCircuitCode handling
            if (packet.Type == PacketType.UseCircuitCode)
            {
                // We need to copy the endpoint so that it doesn't get changed when another thread reuses the
                // buffer.
                object[] array = new object[] { new IPEndPoint(endPoint.Address, endPoint.Port), packet };

                Util.FireAndForget(HandleUseCircuitCode, array);

                return;
            }
            else if (packet.Type == PacketType.CompleteAgentMovement)
            {
                // Send ack straight away to let the viewer know that we got it.
                SendAckImmediate(endPoint, packet.Header.Sequence);

                // We need to copy the endpoint so that it doesn't get changed when another thread reuses the
                // buffer.
//.........这里部分代码省略.........

        /// <summary>
        /// Used by tests that aren't testing this stage.
        /// </summary>
        private ScenePresence AddClient()
        {
            UUID myAgentUuid   = TestHelpers.ParseTail(0x1);
            UUID mySessionUuid = TestHelpers.ParseTail(0x2);
            uint myCircuitCode = 123456;
            IPEndPoint testEp = new IPEndPoint(IPAddress.Loopback, 999);

            UseCircuitCodePacket uccp = new UseCircuitCodePacket();

            UseCircuitCodePacket.CircuitCodeBlock uccpCcBlock
                = new UseCircuitCodePacket.CircuitCodeBlock();
            uccpCcBlock.Code = myCircuitCode;
            uccpCcBlock.ID = myAgentUuid;
            uccpCcBlock.SessionID = mySessionUuid;
            uccp.CircuitCode = uccpCcBlock;

            byte[] uccpBytes = uccp.ToBytes();
            UDPPacketBuffer upb = new UDPPacketBuffer(testEp, uccpBytes.Length);
            upb.DataLength = uccpBytes.Length;  // God knows why this isn't set by the constructor.
            Buffer.BlockCopy(uccpBytes, 0, upb.Data, 0, uccpBytes.Length);

            AgentCircuitData acd = new AgentCircuitData();
            acd.AgentID = myAgentUuid;
            acd.SessionID = mySessionUuid;

            m_scene.AuthenticateHandler.AddNewCircuit(myCircuitCode, acd);

            m_udpServer.PacketReceived(upb);

            return m_scene.GetScenePresence(myAgentUuid);
        }

        /// <summary>
        /// Start the process of sending a packet to the client.
        /// </summary>
        /// <param name="udpClient"></param>
        /// <param name="data"></param>
        /// <param name="type"></param>
        /// <param name="category"></param>
        /// <param name="method">
        /// The method to call if the packet is not acked by the client.  If null, then a standard
        /// resend of the packet is done.
        /// </param>
        public void SendPacketData(
            LLUDPClient udpClient, byte[] data, PacketType type, ThrottleOutPacketType category, UnackedPacketMethod method)
        {
            int dataLength = data.Length;
            bool doZerocode = (data[0] & Helpers.MSG_ZEROCODED) != 0;
            bool doCopy = true;

            // Frequency analysis of outgoing packet sizes shows a large clump of packets at each end of the spectrum.
            // The vast majority of packets are less than 200 bytes, although due to asset transfers and packet splitting
            // there are a decent number of packets in the 1000-1140 byte range. We allocate one of two sizes of data here
            // to accomodate for both common scenarios and provide ample room for ACK appending in both
            int bufferSize = (dataLength > 180) ? LLUDPServer.MTU : 200;

            UDPPacketBuffer buffer = new UDPPacketBuffer(udpClient.RemoteEndPoint, bufferSize);

            // Zerocode if needed
            if (doZerocode)
            {
                try
                {
                    dataLength = Helpers.ZeroEncode(data, dataLength, buffer.Data);
                    doCopy = false;
                }
                catch (IndexOutOfRangeException)
                {
                    // The packet grew larger than the bufferSize while zerocoding.
                    // Remove the MSG_ZEROCODED flag and send the unencoded data
                    // instead
                    m_log.Debug("[LLUDPSERVER]: Packet exceeded buffer size during zerocoding for " + type + ". DataLength=" + dataLength +
                        " and BufferLength=" + buffer.Data.Length + ". Removing MSG_ZEROCODED flag");
                    data[0] = (byte)(data[0] & ~Helpers.MSG_ZEROCODED);
                }
            }

            // If the packet data wasn't already copied during zerocoding, copy it now
            if (doCopy)
            {
                if (dataLength <= buffer.Data.Length)
                {
                    Buffer.BlockCopy(data, 0, buffer.Data, 0, dataLength);
                }
                else
                {
                    bufferSize = dataLength;
                    buffer = new UDPPacketBuffer(udpClient.RemoteEndPoint, bufferSize);

                    // m_log.Error("[LLUDPSERVER]: Packet exceeded buffer size! This could be an indication of packet assembly not obeying the MTU. Type=" +
                    //     type + ", DataLength=" + dataLength + ", BufferLength=" + buffer.Data.Length + ". Dropping packet");
                    Buffer.BlockCopy(data, 0, buffer.Data, 0, dataLength);
                }
            }

            buffer.DataLength = dataLength;

            #region Queue or Send

            OutgoingPacket outgoingPacket = new OutgoingPacket(udpClient, buffer, category, null);
            // If we were not provided a method for handling unacked, use the UDPServer default method
            outgoingPacket.UnackedMethod = ((method == null) ? delegate(OutgoingPacket oPacket) { ResendUnacked(oPacket); } : method);

            // If a Linden Lab 1.23.5 client receives an update packet after a kill packet for an object, it will 
            // continue to display the deleted object until relog.  Therefore, we need to always queue a kill object
            // packet so that it isn't sent before a queued update packet.
            bool requestQueue = type == PacketType.KillObject;
            if (!outgoingPacket.Client.EnqueueOutgoing(outgoingPacket, requestQueue))
                SendPacketFinal(outgoingPacket);

            #endregion Queue or Send
        }