public void ResendUnacked(LLUDPClient udpClient)
{
if (!udpClient.IsConnected)
return;
// Disconnect an agent if no packets are received for some time
if ((Environment.TickCount & int.MaxValue) - udpClient.TickLastPacketReceived > 1000*ClientTimeOut &&
!udpClient.IsPaused)
{
MainConsole.Instance.Warn("[LLUDP Server]: Ack timeout, disconnecting " + udpClient.AgentID);
ILoginMonitor monitor = m_scene.RequestModuleInterface<IMonitorModule>().GetMonitor<ILoginMonitor>(null);
if (monitor != null)
monitor.AddAbnormalClientThreadTermination();
RemoveClient(udpClient);
return;
}
// Get a list of all of the packets that have been sitting unacked longer than udpClient.RTO
List<OutgoingPacket> expiredPackets = udpClient.NeedAcks.GetExpiredPackets(udpClient.RTO);
if (expiredPackets != null)
{
//MainConsole.Instance.Debug("[LLUDP Server]: Resending " + expiredPackets.Count + " packets to " + udpClient.AgentID + ", RTO=" + udpClient.RTO);
// Exponential back off of the retransmission timeout
udpClient.BackoffRTO();
foreach (OutgoingPacket t in expiredPackets.Where(t => t.UnackedMethod != null))
{
t.UnackedMethod(t);
}
// Resend packets
foreach (OutgoingPacket outgoingPacket in expiredPackets.Where(t => t.UnackedMethod == null))
{
//MainConsole.Instance.DebugFormat("[LLUDP Server]: Resending packet #{0} (attempt {1}), {2}ms have passed",
// outgoingPacket.SequenceNumber, outgoingPacket.ResendCount, Environment.TickCount - outgoingPacket.TickCount);
// Set the resent flag
outgoingPacket.Buffer.Data[0] = (byte) (outgoingPacket.Buffer.Data[0] | Helpers.MSG_RESENT);
// resend in its original category
outgoingPacket.Category = ThrottleOutPacketType.Resend;
// Bump up the resend count on this packet
Interlocked.Increment(ref outgoingPacket.ResendCount);
//Interlocked.Increment(ref Stats.ResentPackets);
// Requeue or resend the packet
if (!outgoingPacket.Client.EnqueueOutgoing(outgoingPacket))
SendPacketFinal(outgoingPacket);
}
}
}
