3 files changed, 24 insertions, 10 deletions

diff --git a/OpenSim/Framework/GridInstantMessage.cs b/OpenSim/Framework/GridInstantMessage.cs
index da3690c..d856173 100644
--- a/OpenSim/Framework/GridInstantMessage.cs
+++ b/OpenSim/Framework/GridInstantMessage.cs
@@ -47,6 +47,7 @@ namespace OpenSim.Framework
         public uint ParentEstateID;
         public Guid RegionID;
         public uint timestamp;
+        public Guid ID;
 
         public GridInstantMessage()
         {
@@ -66,6 +67,8 @@ namespace OpenSim.Framework
             Position = im.Position;
             binaryBucket = im.binaryBucket;
             RegionID = im.RegionID;
+            ParentEstateID = im.ParentEstateID;
+            ID = im.ID;
 
             if (addTimestamp)
                 timestamp = (uint)Util.UnixTimeSinceEpoch();
@@ -75,7 +78,7 @@ namespace OpenSim.Framework
                 string _fromAgentName, UUID _toAgentID,
                 byte _dialog, bool _fromGroup, string _message,
                 UUID _imSessionID, bool _offline, Vector3 _position,
-                byte[] _binaryBucket, bool addTimestamp)
+                byte[] _binaryBucket, UUID _ID, bool addTimestamp)
         {
             fromAgentID = _fromAgentID.Guid;
             fromAgentName = _fromAgentName;
@@ -84,6 +87,8 @@ namespace OpenSim.Framework
             fromGroup = _fromGroup;
             message = _message;
             imSessionID = _imSessionID.Guid;
+            ID = _ID.Guid;
+
             if (_offline)
                 offline = 1;
             else
@@ -102,11 +107,21 @@ namespace OpenSim.Framework
         }
 
         public GridInstantMessage(IScene scene, UUID _fromAgentID,
+                string _fromAgentName, UUID _toAgentID,
+                byte _dialog, bool _fromGroup, string _message,
+                UUID _imSessionID, bool _offline, Vector3 _position,
+                byte[] _binaryBucket, bool addTimestamp) : this(scene, _fromAgentID, _fromAgentName,
+                _toAgentID, _dialog, false, _message,
+                _fromAgentID ^ _toAgentID, _offline, _position, new byte[0], UUID.Zero, true)
+        {
+        }
+
+        public GridInstantMessage(IScene scene, UUID _fromAgentID,
                 string _fromAgentName, UUID _toAgentID, byte _dialog,
                 string _message, bool _offline,
                 Vector3 _position) : this(scene, _fromAgentID, _fromAgentName,
                 _toAgentID, _dialog, false, _message,
-                _fromAgentID ^ _toAgentID, _offline, _position, new byte[0], true)
+                _fromAgentID ^ _toAgentID, _offline, _position, new byte[0], UUID.Zero, true)
         {
         }
     }
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
index 6dd2ffd..68fe8d9 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
@@ -953,7 +953,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         /// Send an instant message to this client
         /// </summary>
         //
-        // Don't remove transaction ID! Groups and item gives need to set it!
         public void SendInstantMessage(GridInstantMessage im)
         {
             if (((Scene)(m_scene)).Permissions.CanInstantMessage(new UUID(im.fromAgentID), new UUID(im.toAgentID)))
@@ -962,14 +961,11 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                     = (ImprovedInstantMessagePacket)PacketPool.Instance.GetPacket(PacketType.ImprovedInstantMessage);
 
                 msg.AgentData.AgentID = new UUID(im.fromAgentID);
-                msg.AgentData.SessionID = UUID.Zero;
+                msg.AgentData.SessionID = new UUID(im.imSessionID);
                 msg.MessageBlock.FromAgentName = Util.StringToBytes256(im.fromAgentName);
                 msg.MessageBlock.Dialog = im.dialog;
                 msg.MessageBlock.FromGroup = im.fromGroup;
-                if (im.imSessionID == UUID.Zero.Guid)
-                    msg.MessageBlock.ID = new UUID(im.fromAgentID) ^ new UUID(im.toAgentID);
-                else
-                    msg.MessageBlock.ID = new UUID(im.imSessionID);
+                msg.MessageBlock.ID = new UUID(im.ID);
                 msg.MessageBlock.Offline = im.offline;
                 msg.MessageBlock.ParentEstateID = im.ParentEstateID;
                 msg.MessageBlock.Position = im.Position;
diff --git a/OpenSim/Region/CoreModules/Avatar/InstantMessage/MessageTransferModule.cs b/OpenSim/Region/CoreModules/Avatar/InstantMessage/MessageTransferModule.cs
index 6958905..1366103 100644
--- a/OpenSim/Region/CoreModules/Avatar/InstantMessage/MessageTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/InstantMessage/MessageTransferModule.cs
@@ -216,6 +216,7 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
                 UUID fromAgentID = UUID.Zero;
                 UUID toAgentID = UUID.Zero;
                 UUID imSessionID = UUID.Zero;
+                UUID imID = UUID.Zero;
                 uint timestamp = 0;
                 string fromAgentName = "";
                 string message = "";
@@ -232,7 +233,6 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
                 float pos_z = 0;
                 //m_log.Info("Processing IM");
 
-
                 Hashtable requestData = (Hashtable)request.Params[0];
                 // Check if it's got all the data
                 if (requestData.ContainsKey("from_agent_id")
@@ -263,6 +263,7 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
                     UUID.TryParse((string)requestData["to_agent_id"], out toAgentID);
                     UUID.TryParse((string)requestData["im_session_id"], out imSessionID);
                     UUID.TryParse((string)requestData["region_id"], out RegionID);
+                    UUID.TryParse((string)requestData["id"], out imID);
 
                     try
                     {
@@ -390,6 +391,7 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
                     gim.ParentEstateID = ParentEstateID;
                     gim.Position = Position;
                     gim.binaryBucket = binaryBucket;
+                    gim.ID = imID.Guid;
 
 
                     // Trigger the Instant message in the scene.
@@ -508,7 +510,6 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
 
             UUID toAgentID = new UUID(im.toAgentID);
             PresenceInfo upd = null;
-            UUID regionID;
             bool lookupAgent = false;
 
             lock (m_UserRegionMap)
@@ -701,6 +702,8 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
             gim["from_agent_session"] = UUID.Zero.ToString();
             gim["to_agent_id"] = msg.toAgentID.ToString();
             gim["im_session_id"] = msg.imSessionID.ToString();
+            if(msg.ID != Guid.Empty)
+                gim["id"] = msg.ID.ToString();
             gim["timestamp"] = msg.timestamp.ToString();
             gim["from_agent_name"] = msg.fromAgentName;
             gim["message"] = msg.message;