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using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using libsecondlife;
using libsecondlife.Packets;
using OpenSim.Framework;
namespace OpenSim.Region.ClientStack.LindenUDP
{
public class LLPacketTracker
{
public delegate void PacketAcked(uint sequenceNumber);
public event PacketAcked OnPacketAcked;
protected List<uint> m_beenAcked = new List<uint>();
protected TerrainPacketTracker[,] m_sentTerrainPackets = new TerrainPacketTracker[16, 16];
protected Dictionary<LLUUID, PrimPacketTracker> m_sendPrimPackets = new Dictionary<LLUUID, PrimPacketTracker>();
protected LLClientView m_parentClient;
public LLPacketTracker(LLClientView parent)
{
m_parentClient = parent;
OnPacketAcked += TerrainPacketAcked;
//OnPacketAcked += PrimPacketAcked;
}
public void PacketAck(uint sequenceNumber)
{
lock (m_beenAcked)
{
m_beenAcked.Add(sequenceNumber);
}
}
public void TrackTerrainPacket(uint sequenceNumber, int patchX, int patchY)
{
TrackTerrainPacket(sequenceNumber, patchX, patchY, false, null);
}
public void TrackTerrainPacket(uint sequenceNumber, int patchX, int patchY, bool keepResending, LayerDataPacket packet)
{
TerrainPacketTracker tracker = new TerrainPacketTracker();
tracker.X = patchX;
tracker.Y = patchY;
tracker.SeqNumber = sequenceNumber;
tracker.TimeSent = DateTime.Now;
tracker.KeepResending = keepResending;
tracker.Packet = packet;
lock (m_sentTerrainPackets)
{
m_sentTerrainPackets[patchX, patchY] = tracker;
}
}
public void TrackPrimPacket(uint sequenceNumber, LLUUID primID)
{
PrimPacketTracker tracker = new PrimPacketTracker();
tracker.PrimID = primID;
tracker.TimeSent = DateTime.Now;
tracker.SeqNumber = sequenceNumber;
lock (m_sendPrimPackets)
{
m_sendPrimPackets[primID] = tracker;
}
}
public void TerrainPacketCheck()
{
DateTime now = DateTime.Now;
List<TerrainPacketTracker> resendList = new List<TerrainPacketTracker>();
lock (m_sentTerrainPackets)
{
for (int y = 0; y < 16; y++)
{
for (int x = 0; x < 16; x++)
{
if (m_sentTerrainPackets[x, y] != null)
{
TerrainPacketTracker tracker = m_sentTerrainPackets[x, y];
if ((now - tracker.TimeSent) > TimeSpan.FromMinutes(1))
{
tracker.TimeSent = now;
m_sentTerrainPackets[x, y] = null;
resendList.Add(tracker);
}
}
}
}
}
foreach (TerrainPacketTracker tracker in resendList)
{
if (!tracker.KeepResending)
{
m_parentClient.TriggerTerrainUnackedEvent(tracker.X, tracker.Y);
}
else
{
if (tracker.Packet != null)
{
tracker.Packet.Header.Resent = true;
m_parentClient.OutPacket(tracker.Packet, ThrottleOutPacketType.Resend);
tracker.TimeSent = DateTime.Now;
lock (m_sentTerrainPackets)
{
if (m_sentTerrainPackets[tracker.X, tracker.Y] == null)
{
m_sentTerrainPackets[tracker.X, tracker.Y] = tracker;
}
}
}
}
}
}
public void PrimPacketCheck()
{
DateTime now = DateTime.Now;
List<PrimPacketTracker> resendList = new List<PrimPacketTracker>();
List<PrimPacketTracker> ackedList = new List<PrimPacketTracker>();
lock (m_sendPrimPackets)
{
foreach (PrimPacketTracker tracker in m_sendPrimPackets.Values)
{
if (tracker.Acked)
{
ackedList.Add(tracker);
}
else if (((now - tracker.TimeSent) > TimeSpan.FromMinutes(1)) && (!tracker.Acked))
{
resendList.Add(tracker);
}
}
}
foreach (PrimPacketTracker tracker in resendList)
{
lock (m_sendPrimPackets)
{
m_sendPrimPackets.Remove(tracker.PrimID);
}
//call event
Console.WriteLine("Prim packet not acked, " + tracker.PrimID.ToString());
}
RemovePrimTrackers(ackedList);
}
public void PrimTrackerCleanup()
{
List<PrimPacketTracker> ackedList = new List<PrimPacketTracker>();
lock (m_sendPrimPackets)
{
foreach (PrimPacketTracker tracker in m_sendPrimPackets.Values)
{
if (tracker.Acked)
{
ackedList.Add(tracker);
}
}
}
Thread.Sleep(15); //give a little bit of time for other code to access list before we lock it again
RemovePrimTrackers(ackedList);
}
protected void RemovePrimTrackers(List<PrimPacketTracker> ackedList)
{
lock (m_sendPrimPackets)
{
foreach (PrimPacketTracker tracker in ackedList)
{
m_sendPrimPackets.Remove(tracker.PrimID);
}
}
}
protected void TerrainPacketAcked(uint sequence)
{
lock (m_sentTerrainPackets)
{
for (int y = 0; y < 16; y++)
{
for (int x = 0; x < 16; x++)
{
if (m_sentTerrainPackets[x, y] != null)
{
if (m_sentTerrainPackets[x, y].SeqNumber == sequence)
{
m_sentTerrainPackets[x, y] = null;
return;
}
}
}
}
}
}
protected void PrimPacketAcked(uint sequence)
{
lock (m_sendPrimPackets)
{
foreach (PrimPacketTracker tracker in m_sendPrimPackets.Values)
{
if (tracker.SeqNumber == sequence)
{
tracker.Acked = true;
break;
}
}
}
}
public void Process()
{
List<uint> ackedPackets = null;
lock (m_beenAcked)
{
ackedPackets = new List<uint>(m_beenAcked);
m_beenAcked.Clear();
}
if (ackedPackets != null)
{
foreach (uint packetId in ackedPackets)
{
if (OnPacketAcked != null)
{
OnPacketAcked(packetId);
}
}
}
// ackedPackets.Clear();
ackedPackets = null;
}
public class TerrainPacketTracker
{
public uint SeqNumber = 0;
public int X;
public int Y;
public DateTime TimeSent;
public LayerDataPacket Packet;
public bool KeepResending;
}
public class PrimPacketTracker
{
public uint SeqNumber = 0;
public DateTime TimeSent;
public LLUUID PrimID;
public bool Acked = false;
}
}
}
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