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-rw-r--r--OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs65
1 files changed, 64 insertions, 1 deletions
diff --git a/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs b/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
index c9a6b84..853d550 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
@@ -47,6 +47,16 @@ namespace OpenSim.Region.ClientStack.LindenUDP
47{ 47{
48 public delegate bool PacketMethod(IClientAPI simClient, Packet packet); 48 public delegate bool PacketMethod(IClientAPI simClient, Packet packet);
49 49
50 public class PacketDupeLimiter
51 {
52 public PacketType pktype;
53 public int timeIn;
54 public uint packetId;
55 public PacketDupeLimiter()
56 {
57 }
58 }
59
50 /// <summary> 60 /// <summary>
51 /// Handles new client connections 61 /// Handles new client connections
52 /// Constructor takes a single Packet and authenticates everything 62 /// Constructor takes a single Packet and authenticates everything
@@ -83,6 +93,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
83 93
84 private int m_packetsSent = 0; 94 private int m_packetsSent = 0;
85 private int m_lastPacketsSentSentToScene = 0; 95 private int m_lastPacketsSentSentToScene = 0;
96 private int m_clearDuplicatePacketTrackingOlderThenXSeconds = 30;
86 97
87 private int m_probesWithNoIngressPackets = 0; 98 private int m_probesWithNoIngressPackets = 0;
88 private int m_lastPacketsReceived = 0; 99 private int m_lastPacketsReceived = 0;
@@ -92,6 +103,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
92 private readonly uint m_circuitCode; 103 private readonly uint m_circuitCode;
93 private int m_moneyBalance; 104 private int m_moneyBalance;
94 105
106 private Dictionary<uint, PacketDupeLimiter> m_dupeLimiter = new Dictionary<uint, PacketDupeLimiter>();
107
95 private int m_animationSequenceNumber = 1; 108 private int m_animationSequenceNumber = 1;
96 109
97 private byte[] m_channelVersion = Helpers.StringToField("OpenSimulator 0.5"); // Dummy value needed by libSL 110 private byte[] m_channelVersion = Helpers.StringToField("OpenSimulator 0.5"); // Dummy value needed by libSL
@@ -3837,6 +3850,40 @@ namespace OpenSim.Region.ClientStack.LindenUDP
3837 m_lastPacketsSentSentToScene = m_packetsSent; 3850 m_lastPacketsSentSentToScene = m_packetsSent;
3838 } 3851 }
3839 } 3852 }
3853 protected void ClearOldPacketDupeTracking()
3854 {
3855 lock (m_dupeLimiter)
3856 {
3857 List<uint> toEliminate = new List<uint>();
3858 try
3859 {
3860
3861 foreach (uint seq in m_dupeLimiter.Keys)
3862 {
3863 PacketDupeLimiter pkdata = null;
3864 m_dupeLimiter.TryGetValue(seq, out pkdata);
3865 if (pkdata != null)
3866 {
3867 // doing a foreach loop, so we don't want to modify the dictionary while we're searching it
3868 if (Util.UnixTimeSinceEpoch() - pkdata.timeIn > m_clearDuplicatePacketTrackingOlderThenXSeconds)
3869 toEliminate.Add(seq);
3870 }
3871 }
3872 }
3873 catch (InvalidOperationException)
3874 {
3875 m_log.Info("[PACKET]: Unable to clear dupe check packet data");
3876 }
3877
3878 // remove the dupe packets that we detected in the loop above.
3879 uint[] seqsToRemove = toEliminate.ToArray();
3880 for (int i = 0; i<seqsToRemove.Length; i++)
3881 {
3882 if (m_dupeLimiter.ContainsKey(seqsToRemove[i]))
3883 m_dupeLimiter.Remove(seqsToRemove[i]);
3884 }
3885 }
3886 }
3840 3887
3841 #endregion 3888 #endregion
3842 3889
@@ -3866,7 +3913,23 @@ namespace OpenSim.Region.ClientStack.LindenUDP
3866 protected void ProcessInPacket(Packet Pack) 3913 protected void ProcessInPacket(Packet Pack)
3867 { 3914 {
3868 ack_pack(Pack); 3915 ack_pack(Pack);
3869 3916 lock (m_dupeLimiter)
3917 {
3918 if (m_dupeLimiter.ContainsKey(Pack.Header.Sequence))
3919 {
3920 m_log.Info("[CLIENT]: Warning Duplicate packet detected" + Pack.Type.ToString() + " Dropping.");
3921 return;
3922 }
3923 else
3924 {
3925 PacketDupeLimiter pkdedupe = new PacketDupeLimiter();
3926 pkdedupe.packetId = Pack.Header.ID;
3927 pkdedupe.pktype = Pack.Type;
3928 pkdedupe.timeIn = Util.UnixTimeSinceEpoch();
3929 m_dupeLimiter.Add(Pack.Header.Sequence, pkdedupe);
3930 }
3931 }
3932 //m_log.Info("Sequence"
3870 if (ProcessPacketMethod(Pack)) 3933 if (ProcessPacketMethod(Pack))
3871 { 3934 {
3872 //there is a handler registered that handled this packet type 3935 //there is a handler registered that handled this packet type