void StartPingCheckHandler(Packet packet, Agent agent)
{
StartPingCheckPacket start = (StartPingCheckPacket)packet;
CompletePingCheckPacket complete = new CompletePingCheckPacket();
complete.Header.Reliable = false;
complete.PingID.PingID = start.PingID.PingID;
agent.SendPacket(complete);
}
public void CompletePing(LLUDPClient udpClient, byte pingID)
{
CompletePingCheckPacket completePing = new CompletePingCheckPacket();
completePing.PingID.PingID = pingID;
SendPacket(udpClient, completePing, ThrottleOutPacketType.Unknown, false, null);
}
private void StartPingCheckHandler(Packet packet, Simulator simulator)
{
StartPingCheckPacket incomingPing = (StartPingCheckPacket)packet;
CompletePingCheckPacket ping = new CompletePingCheckPacket();
ping.PingID.PingID = incomingPing.PingID.PingID;
ping.Header.Reliable = false;
// TODO: We can use OldestUnacked to correct transmission errors
// I don't think that's right. As far as I can tell, the Viewer
// only uses this to prune its duplicate-checking buffer. -bushing
SendPacket(ping, simulator);
}
private void StartPingCheckHandler(Packet packet, Simulator simulator)
{
StartPingCheckPacket incomingPing = (StartPingCheckPacket)packet;
CompletePingCheckPacket ping = new CompletePingCheckPacket();
ping.PingID.PingID = incomingPing.PingID.PingID;
// TODO: We can use OldestUnacked to correct transmission errors
SendPacket((Packet)ping, simulator);
}
public virtual void InPacket(Packet NewPack)
{
// Handle appended ACKs
if (NewPack.Header.AppendedAcks)
{
lock (NeedAck)
{
foreach (uint ack in NewPack.Header.AckList)
{
NeedAck.Remove(ack);
}
}
}
// Handle PacketAck packets
if (NewPack.Type == PacketType.PacketAck)
{
PacketAckPacket ackPacket = (PacketAckPacket)NewPack;
lock (NeedAck)
{
foreach (PacketAckPacket.PacketsBlock block in ackPacket.Packets)
{
NeedAck.Remove(block.ID);
}
}
}
else if ((NewPack.Type == PacketType.StartPingCheck))
{
//reply to pingcheck
libsecondlife.Packets.StartPingCheckPacket startPing = (libsecondlife.Packets.StartPingCheckPacket)NewPack;
libsecondlife.Packets.CompletePingCheckPacket endPing = new CompletePingCheckPacket();
endPing.PingID.PingID = startPing.PingID.PingID;
OutPacket(endPing);
}
else
{
QueItem item = new QueItem();
item.Packet = NewPack;
item.Incoming = true;
this.PacketQueue.Enqueue(item);
}
}
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)
{
m_log.ErrorFormat("[LLUDPSERVER]: Malformed data, cannot parse packet from {0}:\n{1}",
buffer.RemoteEndPoint, Utils.BytesToHexString(buffer.Data, buffer.DataLength, null));
}
// Fail-safe check
if (packet == null)
{
m_log.Warn("[LLUDPSERVER]: Couldn't build a message from incoming data " + buffer.DataLength +
" bytes long from " + buffer.RemoteEndPoint);
return;
}
#endregion Decoding
#region Packet to Client Mapping
// UseCircuitCode handling
if (packet.Type == PacketType.UseCircuitCode)
{
m_log.Debug("[LLUDPSERVER]: Handling UseCircuitCode packet from " + buffer.RemoteEndPoint);
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.TryGetClient(address, out client) || !(client is LLClientView))
{
m_log.Debug("[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.Remove(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.Remove(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);
// This is a somewhat odd sequence of steps to pull the client.BytesSinceLastACK value out,
// add the current received bytes to it, test if 2*MTU bytes have been sent, if so remove
// 2*MTU bytes from the value and send ACKs, and finally add the local value back to
// client.BytesSinceLastACK. Lockless thread safety
int bytesSinceLastACK = Interlocked.Exchange(ref udpClient.BytesSinceLastACK, 0);
bytesSinceLastACK += buffer.DataLength;
if (bytesSinceLastACK > LLUDPServer.MTU * 2)
{
bytesSinceLastACK -= LLUDPServer.MTU * 2;
SendAcks(udpClient);
}
Interlocked.Add(ref udpClient.BytesSinceLastACK, bytesSinceLastACK);
}
#endregion ACK Sending
#region Incoming Packet Accounting
// Check the archive of received reliable packet IDs to see whether we already received this packet
if (packet.Header.Reliable && !udpClient.PacketArchive.TryEnqueue(packet.Header.Sequence))
{
if (packet.Header.Resent)
m_log.Debug("[LLUDPSERVER]: Received a resend of already processed packet #" + packet.Header.Sequence + ", type: " + packet.Type);
else
m_log.Warn("[LLUDPSERVER]: Received a duplicate (not marked as resend) of packet #" + packet.Header.Sequence + ", type: " + packet.Type);
// Avoid firing a callback twice for the same packet
return;
}
#endregion Incoming Packet Accounting
#region Ping Check Handling
if (packet.Type == PacketType.StartPingCheck)
{
// We don't need to do anything else with ping checks
StartPingCheckPacket startPing = (StartPingCheckPacket)packet;
CompletePingCheckPacket completePing = new CompletePingCheckPacket();
completePing.PingID.PingID = startPing.PingID.PingID;
SendPacket(udpClient, completePing, ThrottleOutPacketType.Unknown, false);
return;
}
else if (packet.Type == PacketType.CompletePingCheck)
{
// We don't currently track client ping times
return;
}
#endregion Ping Check Handling
// Inbox insertion
packetInbox.Enqueue(new IncomingPacket(udpClient, packet));
}
public void CompletePing(LLAgent agent, byte pingID)
{
CompletePingCheckPacket completePing = new CompletePingCheckPacket();
completePing.Header.Reliable = false;
completePing.PingID.PingID = pingID;
SendPacket(agent, completePing, ThrottleCategory.Unknown, false);
}
/// <summary>
/// Callback handler for incomming data
/// </summary>
/// <param name="result"></param>
private void OnReceivedData(IAsyncResult result)
{
ipeSender = new IPEndPoint(IPAddress.Any, 0);
epSender = (EndPoint)ipeSender;
Packet packet = null;
int numBytes;
// If we're receiving data the sim connection is open
connected = true;
// Update the disconnect flag so this sim doesn't time out
DisconnectCandidate = false;
NetworkInfo User_info=null;
lock (RecvBuffer)
{
// Retrieve the incoming packet
try
{
numBytes = Connection.EndReceiveFrom(result, ref epSender);
//find user_agent_info
int packetEnd = numBytes - 1;
packet = Packet.BuildPacket(RecvBuffer, ref packetEnd, ZeroBuffer);
//should check if login/useconnection packet first
if (packet.Type == PacketType.UseCircuitCode)
{
//new connection
//TODO check that this circuit and session is expected
UseCircuitCodePacket cir_pack=(UseCircuitCodePacket)packet;
NetworkInfo new_user=new NetworkInfo();
new_user.CircuitCode=cir_pack.CircuitCode.Code;
new_user.User.AgentID=cir_pack.CircuitCode.ID;
new_user.User.SessionID=cir_pack.CircuitCode.SessionID;
new_user.endpoint=epSender;
new_user.Inbox = new Queue<uint>(Settings.INBOX_SIZE);
new_user.Connection = new ClientConnection();
new_user.Connection.NetInfo = new_user;
new_user.Connection.Start();
//this.CallbackObject.NewUserCallback(new_user);
this.User_agents.Add(new_user);
}
NetworkInfo temp_agent=null;
IPEndPoint send_ip=(IPEndPoint)epSender;
// this.callback_object.error("incoming: address is "+send_ip.Address +"port number is: "+send_ip.Port.ToString());
for(int ii=0; ii<this.User_agents.Count ; ii++)
{
temp_agent=(NetworkInfo)this.User_agents[ii];
IPEndPoint ag_ip=(IPEndPoint)temp_agent.endpoint;
//this.callback_object.error("searching: address is "+ag_ip.Address +"port number is: "+ag_ip.Port.ToString());
if((ag_ip.Address.ToString()==send_ip.Address.ToString()) && (ag_ip.Port.ToString()==send_ip.Port.ToString()))
{
//this.callback_object.error("found user");
User_info=temp_agent;
break;
}
}
Connection.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender, ReceivedData, null);
}
catch (SocketException)
{
// Client.Log(endPoint.ToString() + " socket is closed, shutting down " + this.Region.Name,
// Helpers.LogLevel.Info);
connected = false;
//Network.DisconnectSim(this);
return;
}
}
if(User_info==null)
{
//error finding agent
//this.CallbackObject.ErrorCallback("no user found");
return;
}
// Fail-safe check
if (packet == null)
{
//this.CallbackObject.ErrorCallback("couldn't build packet");
// Client.Log("Couldn't build a message from the incoming data", Helpers.LogLevel.Warning);
return;
}
//this.callback_object.error("past tests");
// Track the sequence number for this packet if it's marked as reliable
if (packet.Header.Reliable)
{
if (User_info.PendingAcks.Count > Settings.MAX_PENDING_ACKS)
{
SendAcks(User_info);
}
// Check if we already received this packet
if (User_info.Inbox.Contains(packet.Header.Sequence))
{
//Client.Log("Received a duplicate " + packet.Type.ToString() + ", sequence=" +
// packet.Header.Sequence + ", resent=" + ((packet.Header.Resent) ? "Yes" : "No") +
// ", Inbox.Count=" + Inbox.Count + ", NeedAck.Count=" + NeedAck.Count,
// Helpers.LogLevel.Info);
// Send an ACK for this packet immediately
//SendAck(packet.Header.Sequence);
// TESTING: Try just queuing up ACKs for resent packets instead of immediately triggering an ACK
lock (User_info.PendingAcks)
{
uint sequence = (uint)packet.Header.Sequence;
if (!User_info.PendingAcks.ContainsKey(sequence)) { User_info.PendingAcks[sequence] = sequence; }
}
// Avoid firing a callback twice for the same packet
// this.callback_object.error("avoiding callback");
return;
}
else
{
lock (User_info.PendingAcks)
{
uint sequence = (uint)packet.Header.Sequence;
if (!User_info.PendingAcks.ContainsKey(sequence)) { User_info.PendingAcks[sequence] = sequence; }
}
}
}
// Add this packet to our inbox
lock (User_info.Inbox)
{
while (User_info.Inbox.Count >= Settings.INBOX_SIZE)
{
User_info.Inbox.Dequeue();
}
User_info.Inbox.Enqueue(packet.Header.Sequence);
}
// Handle appended ACKs
if (packet.Header.AppendedAcks)
{
lock (User_info.NeedAck)
{
foreach (uint ack in packet.Header.AckList)
{
User_info.NeedAck.Remove(ack);
}
}
}
// Handle PacketAck packets
if (packet.Type == PacketType.PacketAck)
{
PacketAckPacket ackPacket = (PacketAckPacket)packet;
lock (User_info.NeedAck)
{
foreach (PacketAckPacket.PacketsBlock block in ackPacket.Packets)
{
User_info.NeedAck.Remove(block.ID);
}
}
}
//if it is a ping check send return
if( ( packet.Type == PacketType.StartPingCheck ) ) {
//reply to pingcheck
libsecondlife.Packets.StartPingCheckPacket startPing = (libsecondlife.Packets.StartPingCheckPacket)packet;
libsecondlife.Packets.CompletePingCheckPacket endPing = new CompletePingCheckPacket();
endPing.PingID.PingID = startPing.PingID.PingID;
SendPacket(endPing, true, User_info );
}
else if(packet.Type != PacketType.PacketAck)
{
User_info.Connection.InQueue.Enqueue(packet);
}
}
