public void ResendUnacked(LLUDPClient udpClient)
{
if (!udpClient.IsConnected)
return;
// Disconnect an agent if no packets are received for some time
//FIXME: Make 60 an .ini setting
if ((Environment.TickCount & Int32.MaxValue) - udpClient.TickLastPacketReceived > 1000 * 60)
{
m_log.Warn("[LLUDPSERVER]: Ack timeout, disconnecting " + udpClient.AgentID);
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)
{
//m_log.Debug("[LLUDPSERVER]: Resending " + expiredPackets.Count + " packets to " + udpClient.AgentID + ", RTO=" + udpClient.RTO);
// Exponential backoff of the retransmission timeout
udpClient.BackoffRTO();
// Resend packets
for (int i = 0; i < expiredPackets.Count; i++)
{
OutgoingPacket outgoingPacket = expiredPackets[i];
//m_log.DebugFormat("[LLUDPSERVER]: 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);
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);
}
}
}