public void FreeUDPBuffer(UDPPacketBuffer buf)
{
lock (m_udpBuffersPoolLock)
{
if (m_udpBuffersPoolPtr < 999)
{
buf.RemoteEndPoint = null;
buf.DataLength = 0;
m_udpBuffersPoolPtr++;
m_udpBuffersPool[m_udpBuffersPoolPtr] = buf;
}
}
}
/// <summary>
/// Default constructor
/// </summary>
public OutgoingPacket(object client, byte[] buffer, int category, int dataSize, IPEndPoint destination,
bool fromBufferPool, Packets.PacketType type)
{
SequenceNumber = 0;
ResendCount = 0;
TickCount = 0;
Client = client;
Category = category;
_fromPool = fromBufferPool;
Type = type;
DataSize = dataSize;
Buffer = new UDPPacketBuffer(buffer, dataSize, destination, category, fromBufferPool);
}
public UDPPacketBuffer GetNewUDPBuffer(IPEndPoint remoteEndpoint)
{
lock (m_udpBuffersPoolLock)
{
if (m_udpBuffersPoolPtr >= 0)
{
UDPPacketBuffer buf = m_udpBuffersPool[m_udpBuffersPoolPtr];
m_udpBuffersPool[m_udpBuffersPoolPtr] = null;
m_udpBuffersPoolPtr--;
buf.RemoteEndPoint = remoteEndpoint;
return(buf);
}
}
return(new UDPPacketBuffer(remoteEndpoint));
}
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
}
private void AsyncEndReceive(IAsyncResult iar)
{
// Asynchronous receive operations will complete here through the call
// to AsyncBeginReceive
if (!m_shutdownFlag)
{
// Asynchronous mode will start another receive before the
// callback for this packet is even fired. Very parallel :-)
if (m_asyncPacketHandling)
{
AsyncBeginReceive();
}
// get the buffer that was created in AsyncBeginReceive
// this is the received data
//WrappedObject<UDPPacketBuffer> wrappedBuffer = (WrappedObject<UDPPacketBuffer>)iar.AsyncState;
//UDPPacketBuffer buffer = wrappedBuffer.Instance;
UDPPacketBuffer buffer = (UDPPacketBuffer)iar.AsyncState;
try
{
// get the length of data actually read from the socket, store it with the
// buffer
buffer.DataLength = m_udpSocket.EndReceiveFrom(iar, ref buffer.RemoteEndPoint);
// call the abstract method PacketReceived(), passing the buffer that
// has just been filled from the socket read.
PacketReceived(buffer);
}
catch (SocketException)
{
}
catch (ObjectDisposedException)
{
}
finally
{
//wrappedBuffer.Dispose();
// Synchronous mode waits until the packet callback completes
// before starting the receive to fetch another packet
if (!m_asyncPacketHandling)
{
AsyncBeginReceive();
}
}
}
}
/// <summary>
/// Disconnect from this simulator
/// </summary>
public void Disconnect(bool sendCloseCircuit)
{
if (connected)
{
connected = false;
// Destroy the timers
if (AckTimer != null)
{
AckTimer.Dispose();
}
if (StatsTimer != null)
{
StatsTimer.Dispose();
}
if (PingTimer != null)
{
PingTimer.Dispose();
}
AckTimer = null;
StatsTimer = null;
PingTimer = null;
// Kill the current CAPS system
if (Caps != null)
{
Caps.Disconnect(true);
Caps = null;
}
if (sendCloseCircuit)
{
// Try to send the CloseCircuit notice
CloseCircuitPacket close = new CloseCircuitPacket();
UDPPacketBuffer buf = new UDPPacketBuffer(remoteEndPoint);
byte[] data = close.ToBytes();
Buffer.BlockCopy(data, 0, buf.Data, 0, data.Length);
buf.DataLength = data.Length;
AsyncBeginSend(buf);
}
// Shut the socket communication down
Stop();
}
}
public void FreeUDPBuffer(UDPPacketBuffer buf)
{
lock (m_udpBuffersPoolLock)
{
if (buf.DataLength < 0)
{
return; // avoid duplicated free that may still happen
}
if (m_udpBuffersPoolPtr < 999)
{
buf.RemoteEndPoint = null;
buf.DataLength = -1;
m_udpBuffersPoolPtr++;
m_udpBuffersPool[m_udpBuffersPoolPtr] = buf;
}
}
}
private void AsyncBeginReceive()
{
// this method actually kicks off the async read on the socket.
// we aquire a reader lock here to ensure that no other thread
// is trying to set shutdownFlag and close the socket.
rwLock.AcquireReaderLock(-1);
if (!shutdownFlag)
{
// increment the count of pending operations
Interlocked.Increment(ref rwOperationCount);
// allocate a packet buffer
//WrappedObject<UDPPacketBuffer> wrappedBuffer = Pool.CheckOut();
UDPPacketBuffer buf = new UDPPacketBuffer();
try
{
// kick off an async read
udpSocket.BeginReceiveFrom(
//wrappedBuffer.Instance.Data,
buf.Data,
0,
UDPPacketBuffer.BUFFER_SIZE,
SocketFlags.None,
//ref wrappedBuffer.Instance.RemoteEndPoint,
ref buf.RemoteEndPoint,
new AsyncCallback(AsyncEndReceive),
//wrappedBuffer);
buf);
}
catch (SocketException)
{
// something bad happened
//Logger.Log(
// "A SocketException occurred in UDPServer.AsyncBeginReceive()",
// Helpers.LogLevel.Error, se);
// an error occurred, therefore the operation is void. Decrement the reference count.
Interlocked.Decrement(ref rwOperationCount);
}
}
// we're done with the socket for now, release the reader lock.
rwLock.ReleaseReaderLock();
}
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 void AsyncBeginSend(UDPPacketBuffer buf)
{
// if (IsRunningOutbound)
// {
try
{
m_udpSocket.BeginSendTo(
buf.Data,
0,
buf.DataLength,
SocketFlags.None,
buf.RemoteEndPoint,
AsyncEndSend,
buf);
}
catch (SocketException) { }
catch (ObjectDisposedException) { }
// }
}
public void SyncSend(UDPPacketBuffer buf)
{
try
{
m_udpSocket.SendTo(
buf.Data,
0,
buf.DataLength,
SocketFlags.None,
buf.RemoteEndPoint
);
UdpSends++;
}
catch (SocketException e)
{
m_log.Warn("[UDPBASE]: sync send SocketException {0} " + e.Message);
}
catch (ObjectDisposedException) { }
}
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) { }
}
}
/* not in use
* public void AsyncBeginSend(UDPPacketBuffer buf)
* {
* // if (IsRunningOutbound)
* // {
*
* // This is strictly for debugging purposes to simulate dropped
* // packets when testing throttles & retransmission code
* // if (DropOutgoingPacket())
* // return;
*
* try
* {
* m_udpSocket.BeginSendTo(
* buf.Data,
* 0,
* buf.DataLength,
* SocketFlags.None,
* buf.RemoteEndPoint,
* AsyncEndSend,
* buf);
* }
* catch (SocketException) { }
* catch (ObjectDisposedException) { }
* // }
* }
*
* void AsyncEndSend(IAsyncResult result)
* {
* try
* {
* // UDPPacketBuffer buf = (UDPPacketBuffer)result.AsyncState;
* m_udpSocket.EndSendTo(result);
*
* UdpSends++;
* }
* catch (SocketException) { }
* catch (ObjectDisposedException) { }
* }
*/
public void SyncSend(UDPPacketBuffer buf)
{
if (buf.RemoteEndPoint == null)
{
return; // already expired
}
try
{
m_udpSocket.SendTo(
buf.Data,
0,
buf.DataLength,
SocketFlags.None,
buf.RemoteEndPoint
);
UdpSends++;
}
catch (SocketException e)
{
m_log.WarnFormat("[UDPBASE]: sync send SocketException {0} {1}", buf.RemoteEndPoint, e.Message);
}
catch (ObjectDisposedException) { }
}
/// <summary>
/// Send a raw byte array payload as a packet
/// </summary>
/// <param name="payload">The packet payload</param>
/// <param name="setSequence">Whether the second, third, and fourth bytes
/// should be modified to the current stream sequence number</param>
public void SendPacketUnqueued(byte[] payload, bool setSequence)
{
try
{
if (setSequence && payload.Length > 3)
{
uint sequence = (uint)Interlocked.Increment(ref Sequence);
payload[1] = (byte)(sequence >> 16);
payload[2] = (byte)(sequence >> 8);
payload[3] = (byte)(sequence % 256);
}
Stats.SentBytes += (ulong)payload.Length;
++Stats.SentPackets;
UDPPacketBuffer buf = new UDPPacketBuffer(ipEndPoint);
Buffer.BlockCopy(payload, 0, buf.Data, 0, payload.Length);
buf.DataLength = payload.Length;
AsyncBeginSend(buf);
}
catch (SocketException)
{
Logger.Log("Tried to send a " + payload.Length +
" byte payload on a closed socket, shutting down " + this.ToString(),
Helpers.LogLevel.Info, Client);
Network.DisconnectSim(this, false);
return;
}
catch (Exception e)
{
Logger.Log(e.Message, Helpers.LogLevel.Error, Client, e);
}
}
private void AsyncBeginReceive()
{
UDPPacketBuffer buf;
// FIXME: Disabled for now as this causes issues with reused packet objects interfering with each other
// on Windows with m_asyncPacketHandling = true, though this has not been seen on Linux.
// Possibly some unexpected issue with fetching UDP data concurrently with multiple threads. Requires more investigation.
// if (UsePools)
// buf = Pool.GetObject();
// else
buf = new UDPPacketBuffer();
if (IsRunningInbound)
{
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 e)
{
m_log.Error(
string.Format("[UDPBASE]: Error processing UDP begin receive {0}. Exception ", UdpReceives), e);
}
catch (Exception e)
{
m_log.Error(
string.Format("[UDPBASE]: Error processing UDP begin receive {0}. Exception ", UdpReceives), e);
}
}
}
protected abstract void PacketSent(UDPPacketBuffer buffer, int bytesSent);
// these abstract methods must be implemented in a derived class to actually do // something with the packets that are sent and received. protected abstract void PacketReceived(UDPPacketBuffer buffer);
public OutgoingPacket(Simulator simulator, UDPPacketBuffer buffer, PacketType type)
{
Client = simulator;
Buffer = buffer;
this.Type = type;
}
protected override void PacketReceived(UDPPacketBuffer buffer)
{
Packet packet = null;
// Check if this packet came from the server we expected it to come from
if (!remoteEndPoint.Address.Equals(((IPEndPoint)buffer.RemoteEndPoint).Address))
{
Logger.Log("Received " + buffer.DataLength + " bytes of data from unrecognized source " +
((IPEndPoint)buffer.RemoteEndPoint).ToString(), Helpers.LogLevel.Warning, Client);
return;
}
// Update the disconnect flag so this sim doesn't time out
DisconnectCandidate = false;
#region Packet Decoding
int packetEnd = buffer.DataLength - 1;
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[8192] : null);
}
catch (MalformedDataException)
{
Logger.Log(String.Format("Malformed data, cannot parse packet:\n{0}",
Utils.BytesToHexString(buffer.Data, buffer.DataLength, null)), Helpers.LogLevel.Error);
}
// Fail-safe check
if (packet == null)
{
Logger.Log("Couldn't build a message from the incoming data", Helpers.LogLevel.Warning, Client);
return;
}
Interlocked.Add(ref Stats.RecvBytes, buffer.DataLength);
Interlocked.Increment(ref Stats.RecvPackets);
#endregion Packet Decoding
if (packet.Header.Resent)
{
Interlocked.Increment(ref Stats.ReceivedResends);
}
#region ACK Receiving
// Handle appended ACKs
if (packet.Header.AppendedAcks && packet.Header.AckList != null)
{
lock (NeedAck)
{
for (int i = 0; i < packet.Header.AckList.Length; i++)
{
NeedAck.Remove(packet.Header.AckList[i]);
}
}
}
// Handle PacketAck packets
if (packet.Type == PacketType.PacketAck)
{
PacketAckPacket ackPacket = (PacketAckPacket)packet;
lock (NeedAck)
{
for (int i = 0; i < ackPacket.Packets.Length; i++)
{
NeedAck.Remove(ackPacket.Packets[i].ID);
}
}
}
#endregion ACK Receiving
if (packet.Header.Reliable)
{
#region ACK Sending
// Add this packet to the list of ACKs that need to be sent out
uint sequence = (uint)packet.Header.Sequence;
PendingAcks.Enqueue(sequence);
// Send out ACKs if we have a lot of them
if (PendingAcks.Count >= Client.Settings.MAX_PENDING_ACKS)
{
SendAcks();
}
#endregion ACK Sending
// Check the archive of received packet IDs to see whether we already received this packet
if (!PacketArchive.TryEnqueue(packet.Header.Sequence))
{
if (packet.Header.Resent)
{
Logger.DebugLog("Received a resend of already processed packet #" + packet.Header.Sequence + ", type: " + packet.Type);
}
else
{
Logger.Log("Received a duplicate (not marked as resend) of packet #" + packet.Header.Sequence + ", type: " + packet.Type,
Helpers.LogLevel.Warning);
}
// Avoid firing a callback twice for the same packet
return;
}
}
#region Inbox Insertion
NetworkManager.IncomingPacket incomingPacket;
incomingPacket.Simulator = this;
incomingPacket.Packet = packet;
Network.PacketInbox.Enqueue(incomingPacket);
#endregion Inbox Insertion
#region Stats Tracking
if (Client.Settings.TRACK_UTILIZATION)
{
Client.Stats.Update(packet.Type.ToString(), OpenMetaverse.Stats.Type.Packet, 0, packet.Length);
}
#endregion
}
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)
{
MainConsole.Instance.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;
}
}
MainConsole.Instance.Warn("[UDPBASE]: Salvaged the UDP listener on port " + m_udpPort);
}
}
catch (ObjectDisposedException)
{
}
}
}
protected override void PacketSent(UDPPacketBuffer buffer, int bytesSent)
{
}
protected override void PacketReceived(UDPPacketBuffer buffer)
{
Packet packet = null;
// Check if this packet came from the server we expected it to come from
if (!ipEndPoint.Address.Equals(((IPEndPoint)buffer.RemoteEndPoint).Address))
{
Logger.Log("Received " + buffer.DataLength + " bytes of data from unrecognized source " +
((IPEndPoint)buffer.RemoteEndPoint).ToString(), Helpers.LogLevel.Warning, Client);
return;
}
// Update the disconnect flag so this sim doesn't time out
DisconnectCandidate = false;
#region Packet Decoding
int packetEnd = buffer.DataLength - 1;
try
{
packet = Packet.BuildPacket(buffer.Data, ref packetEnd, buffer.ZeroData);
}
catch (MalformedDataException)
{
Logger.Log(String.Format("Malformed data, cannot parse packet:\n{0}",
Utils.BytesToHexString(buffer.Data, buffer.DataLength, null)), Helpers.LogLevel.Error);
}
// Fail-safe check
if (packet == null)
{
Logger.Log("Couldn't build a message from the incoming data", Helpers.LogLevel.Warning, Client);
return;
}
Stats.RecvBytes += (ulong)buffer.DataLength;
++Stats.RecvPackets;
#endregion Packet Decoding
#region Reliable Handling
if (packet.Header.Reliable)
{
// Add this packet to the list of ACKs that need to be sent out
lock (PendingAcks)
{
uint sequence = (uint)packet.Header.Sequence;
if (!PendingAcks.ContainsKey(sequence))
{
PendingAcks[sequence] = sequence;
}
}
// Send out ACKs if we have a lot of them
if (PendingAcks.Count >= Client.Settings.MAX_PENDING_ACKS)
{
SendAcks();
}
if (packet.Header.Resent)
{
++Stats.ReceivedResends;
}
}
#endregion Reliable Handling
#region Inbox Insertion
NetworkManager.IncomingPacket incomingPacket;
incomingPacket.Simulator = this;
incomingPacket.Packet = packet;
// TODO: Prioritize the queue
Network.PacketInbox.Enqueue(incomingPacket);
#endregion Inbox Insertion
}
private void AsyncEndReceive(IAsyncResult iar)
{
// Asynchronous receive operations will complete here through the call
// to AsyncBeginReceive
if (IsRunningInbound)
{
UdpReceives++;
// Asynchronous mode will start another receive before the
// callback for this packet is even fired. Very parallel :-)
if (m_asyncPacketHandling)
{
AsyncBeginReceive();
}
try
{
// get the buffer that was created in AsyncBeginReceive
// this is the received data
UDPPacketBuffer buffer = (UDPPacketBuffer)iar.AsyncState;
int startTick = Util.EnvironmentTickCount();
// get the length of data actually read from the socket, store it with the
// buffer
buffer.DataLength = m_udpSocket.EndReceiveFrom(iar, ref buffer.RemoteEndPoint);
// call the abstract method PacketReceived(), passing the buffer that
// has just been filled from the socket read.
PacketReceived(buffer);
// If more than one thread can be calling AsyncEndReceive() at once (e.g. if m_asyncPacketHandler)
// then a particular stat may be inaccurate due to a race condition. We won't worry about this
// since this should be rare and won't cause a runtime problem.
if (m_currentReceiveTimeSamples >= s_receiveTimeSamples)
{
AverageReceiveTicksForLastSamplePeriod
= (float)m_receiveTicksInCurrentSamplePeriod / s_receiveTimeSamples;
m_receiveTicksInCurrentSamplePeriod = 0;
m_currentReceiveTimeSamples = 0;
}
else
{
m_receiveTicksInCurrentSamplePeriod += Util.EnvironmentTickCountSubtract(startTick);
m_currentReceiveTimeSamples++;
}
}
catch (SocketException se)
{
m_log.Error(
string.Format(
"[UDPBASE]: Error processing UDP end receive {0}, socket error code {1}. Exception ",
UdpReceives, se.ErrorCode),
se);
}
catch (ObjectDisposedException e)
{
m_log.Error(
string.Format("[UDPBASE]: Error processing UDP end receive {0}. Exception ", UdpReceives), e);
}
catch (Exception e)
{
m_log.Error(
string.Format("[UDPBASE]: Error processing UDP end receive {0}. Exception ", UdpReceives), e);
}
finally
{
// if (UsePools)
// Pool.ReturnObject(buffer);
// Synchronous mode waits until the packet callback completes
// before starting the receive to fetch another packet
if (!m_asyncPacketHandling)
{
AsyncBeginReceive();
}
}
}
}
/// <summary> /// This method is called when an incoming packet is received /// </summary> /// <param name="buffer">Incoming packet buffer</param> public abstract void PacketReceived(UDPPacketBuffer buffer);
/// <summary>
/// Sends a packet directly to the simulator without queuing
/// </summary>
/// <param name="packet">Packet to be sent</param>
/// <param name="setSequence">True to set the sequence number, false to
/// leave it as is</param>
public void SendPacketUnqueued(Packet packet, bool setSequence)
{
byte[] buffer;
int bytes;
// Set sequence implies that this is not a resent packet
if (setSequence)
{
// Reset to zero if we've hit the upper sequence number limit
Interlocked.CompareExchange(ref Sequence, 0, Settings.MAX_SEQUENCE);
// Increment and fetch the current sequence number
packet.Header.Sequence = (uint)Interlocked.Increment(ref Sequence);
if (packet.Header.Reliable)
{
// Wrap this packet in a struct to track timeouts and resends
NetworkManager.OutgoingPacket outgoing = new NetworkManager.OutgoingPacket(this, packet, true);
// Keep track of when this packet was first sent out (right now)
outgoing.TickCount = Environment.TickCount;
// Add this packet to the list of ACK responses we are waiting on from the server
lock (NeedAck)
{
NeedAck[packet.Header.Sequence] = outgoing;
}
if (packet.Header.Resent)
{
// This packet has already been sent out once, strip any appended ACKs
// off it and reinsert them into the outgoing ACK queue under the
// assumption that this packet will continually be rejected from the
// server or that the appended ACKs are possibly making the delivery fail
if (packet.Header.AckList.Length > 0)
{
Logger.DebugLog(String.Format("Purging ACKs from packet #{0} ({1}) which will be resent.",
packet.Header.Sequence, packet.GetType()));
lock (PendingAcks)
{
foreach (uint sequence in packet.Header.AckList)
{
if (!PendingAcks.ContainsKey(sequence))
{
PendingAcks[sequence] = sequence;
}
}
}
packet.Header.AppendedAcks = false;
packet.Header.AckList = new uint[0];
}
// Update the sent time for this packet
SetResentTime(packet.Header.Sequence);
}
else
{
// This packet is not a resend, check if the conditions are favorable
// to ACK appending
if (packet.Type != PacketType.PacketAck &&
packet.Type != PacketType.LogoutRequest)
{
lock (PendingAcks)
{
if (PendingAcks.Count > 0 &&
PendingAcks.Count < Client.Settings.MAX_APPENDED_ACKS)
{
// Append all of the queued up outgoing ACKs to this packet
packet.Header.AckList = new uint[PendingAcks.Count];
for (int i = 0; i < PendingAcks.Count; i++)
{
packet.Header.AckList[i] = PendingAcks.Values[i];
}
PendingAcks.Clear();
packet.Header.AppendedAcks = true;
}
}
}
}
}
else if (packet.Header.AckList.Length > 0)
{
// Sanity check for ACKS appended on an unreliable packet, this is bad form
Logger.Log("Sending appended ACKs on an unreliable packet", Helpers.LogLevel.Warning);
}
}
// Serialize the packet
buffer = packet.ToBytes();
bytes = buffer.Length;
Stats.SentBytes += (ulong)bytes;
++Stats.SentPackets;
UDPPacketBuffer buf = new UDPPacketBuffer(ipEndPoint);
// Zerocode if needed
if (packet.Header.Zerocoded)
{
bytes = Helpers.ZeroEncode(buffer, bytes, buf.Data);
}
else
{
Buffer.BlockCopy(buffer, 0, buf.Data, 0, bytes);
}
buf.DataLength = bytes;
AsyncBeginSend(buf);
}