Mantis#1597. Thank you, Melanie for a patch that:

Adds handlers for the reclaim land functionality, 
plus all needed permissions checks.

OpenSim/Framework/IClientAPI.cs

@@ -514,6 +514,7 @@ namespace OpenSim.Framework
     public delegate void ParcelObjectOwnerRequest(int local_id, IClientAPI remote_client);
 
     public delegate void ParcelAbandonRequest(int local_id, IClientAPI remote_client);
+    public delegate void ParcelReclaim(int local_id, IClientAPI remote_client);
 
     public delegate void ParcelReturnObjectsRequest(int local_id, uint return_type, LLUUID[] agent_ids, LLUUID[] selected_ids, IClientAPI remote_client);
 
@@ -793,6 +794,7 @@ namespace OpenSim.Framework
         event ParcelSelectObjects OnParcelSelectObjects;
         event ParcelObjectOwnerRequest OnParcelObjectOwnerRequest;
         event ParcelAbandonRequest OnParcelAbandonRequest;
+        event ParcelReclaim OnParcelReclaim;
         event ParcelReturnObjectsRequest OnParcelReturnObjectsRequest;
         event RegionInfoRequest OnRegionInfoRequest;
         event EstateCovenantRequest OnEstateCovenantRequest;

OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs

@@ -235,6 +235,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         private ParcelSelectObjects handlerParcelSelectObjects = null; //OnParcelSelectObjects;
         private ParcelObjectOwnerRequest handlerParcelObjectOwnerRequest = null; //OnParcelObjectOwnerRequest;
         private ParcelAbandonRequest handlerParcelAbandonRequest = null;
+        private ParcelReclaim handlerParcelReclaim = null;
         private ParcelReturnObjectsRequest handlerParcelReturnObjectsRequest = null;
         private RegionInfoRequest handlerRegionInfoRequest = null; //OnRegionInfoRequest;
         private EstateCovenantRequest handlerEstateCovenantRequest = null; //OnEstateCovenantRequest;
@@ -868,6 +869,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         public event ParcelSelectObjects OnParcelSelectObjects;
         public event ParcelObjectOwnerRequest OnParcelObjectOwnerRequest;
         public event ParcelAbandonRequest OnParcelAbandonRequest;
+        public event ParcelReclaim OnParcelReclaim;
         public event ParcelReturnObjectsRequest OnParcelReturnObjectsRequest;
         public event RegionInfoRequest OnRegionInfoRequest;
         public event EstateCovenantRequest OnEstateCovenantRequest;
@@ -5661,6 +5663,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                             handlerParcelAbandonRequest(releasePacket.Data.LocalID, this);
                         }
                         break;
+                    case PacketType.ParcelReclaim:
+                        ParcelReclaimPacket reclaimPacket = (ParcelReclaimPacket)Pack;
+
+                        handlerParcelReclaim = OnParcelReclaim;
+                        if (handlerParcelReclaim != null)
+                        {
+                            handlerParcelReclaim(reclaimPacket.Data.LocalID, this);
+                        }
+                        break;
                     case PacketType.ParcelReturnObjects:
 
 

OpenSim/Region/Environment/Modules/World/Land/LandManagementModule.cs

@@ -94,6 +94,7 @@ namespace OpenSim.Region.Environment.Modules.World.Land
             client.OnParcelAccessListRequest += new ParcelAccessListRequest(handleParcelAccessRequest);
             client.OnParcelAccessListUpdateRequest += new ParcelAccessListUpdateRequest(handleParcelAccessUpdateRequest);
             client.OnParcelAbandonRequest += new ParcelAbandonRequest(handleParcelAbandonRequest);
+            client.OnParcelReclaim += new ParcelReclaim(handleParcelReclaim);
 
             if (m_scene.Entities.ContainsKey(client.AgentId))
             {
@@ -932,6 +933,21 @@ namespace OpenSim.Region.Environment.Modules.World.Land
                 {
                     landList[local_id].landData.ownerID = m_scene.RegionInfo.MasterAvatarAssignedUUID;
                     m_scene.Broadcast(SendParcelOverlay);
+                    landList[local_id].sendLandUpdateToClient(remote_client);
+                }
+            }
+
+        }
+
+        public void handleParcelReclaim(int local_id, IClientAPI remote_client)
+        {
+            if (landList.ContainsKey(local_id))
+            {
+                if (m_scene.ExternalChecks.ExternalChecksCanReclaimParcel(remote_client.AgentId, landList[local_id]))
+                {
+                    landList[local_id].landData.ownerID = m_scene.RegionInfo.MasterAvatarAssignedUUID;
+                    m_scene.Broadcast(SendParcelOverlay);
+                    landList[local_id].sendLandUpdateToClient(remote_client);
                 }
             }
 

OpenSim/Region/Environment/Modules/World/NPC/NPCAvatar.cs

@@ -243,6 +243,7 @@ namespace OpenSim.Region.Environment.Modules.World.NPC
         public event ParcelJoinRequest OnParcelJoinRequest;
         public event ParcelPropertiesUpdateRequest OnParcelPropertiesUpdateRequest;
         public event ParcelAbandonRequest OnParcelAbandonRequest;
+        public event ParcelReclaim OnParcelReclaim;
         public event ParcelReturnObjectsRequest OnParcelReturnObjectsRequest;
         public event ParcelAccessListRequest OnParcelAccessListRequest;
         public event ParcelAccessListUpdateRequest OnParcelAccessListUpdateRequest;

OpenSim/Region/Environment/Modules/World/Permissions/PermissionsModule.cs

@@ -143,6 +143,7 @@ namespace OpenSim.Region.Environment.Modules.World.Permissions
             m_scene.ExternalChecks.addSetBypassPermissions(SetBypassPermissions); //FULLY IMPLEMENTED
             m_scene.ExternalChecks.addPropagatePermissions(PropagatePermissions); //FULLY IMPLEMENTED
             m_scene.ExternalChecks.addCheckAbandonParcel(CanAbandonParcel); //FULLY IMPLEMENTED
+            m_scene.ExternalChecks.addCheckReclaimParcel(CanReclaimParcel); //FULLY IMPLEMENTED
             m_scene.ExternalChecks.addGenerateClientFlags(GenerateClientFlags); //NOT YET FULLY IMPLEMENTED
             m_scene.ExternalChecks.addCheckBeGodLike(CanBeGodLike); //FULLY IMPLEMENTED
             m_scene.ExternalChecks.addCheckDuplicateObject(CanDuplicateObject); //FULLY IMPLEMENTED
@@ -531,6 +532,14 @@ namespace OpenSim.Region.Environment.Modules.World.Permissions
                 return GenericParcelPermission(user, parcel);
             }
 
+            private bool CanReclaimParcel(LLUUID user, ILandObject parcel, Scene scene)
+            {
+                DebugPermissionInformation(MethodInfo.GetCurrentMethod().Name);
+                if (m_bypassPermissions) return m_bypassPermissionsValue;
+
+                return GenericParcelPermission(user, parcel);
+            }
+
             private bool CanBeGodLike(LLUUID user, Scene scene)
             {
                 DebugPermissionInformation(MethodInfo.GetCurrentMethod().Name);

OpenSim/Region/Environment/Scenes/SceneExternalChecks.cs

@@ -899,6 +899,31 @@ namespace OpenSim.Region.Environment.Scenes
             }
             #endregion
 
+            public delegate bool CanReclaimParcel(LLUUID user, ILandObject parcel, Scene scene);
+            private List<CanReclaimParcel> CanReclaimParcelCheckFunctions = new List<CanReclaimParcel>();
+
+            public void addCheckReclaimParcel(CanReclaimParcel delegateFunc)
+            {
+                if (!CanReclaimParcelCheckFunctions.Contains(delegateFunc))
+                    CanReclaimParcelCheckFunctions.Add(delegateFunc);
+            }
+            public void removeCheckReclaimParcel(CanReclaimParcel delegateFunc)
+            {
+                if (CanReclaimParcelCheckFunctions.Contains(delegateFunc))
+                    CanReclaimParcelCheckFunctions.Remove(delegateFunc);
+            }
+
+            public bool ExternalChecksCanReclaimParcel(LLUUID user, ILandObject parcel)
+            {
+                foreach (CanReclaimParcel check in CanReclaimParcelCheckFunctions)
+                {
+                    if (check(user, parcel, m_scene) == false)
+                    {
+                        return false;
+                    }
+                }
+                return true;
+            }
             public delegate bool CanBuyLand(LLUUID user, ILandObject parcel, Scene scene);
             private List<CanBuyLand> CanBuyLandCheckFunctions = new List<CanBuyLand>();
 

OpenSim/Region/Examples/SimpleModule/MyNpcCharacter.cs

@@ -148,6 +148,7 @@ namespace OpenSim.Region.Examples.SimpleModule
         public event ParcelJoinRequest OnParcelJoinRequest;
         public event ParcelPropertiesUpdateRequest OnParcelPropertiesUpdateRequest;
         public event ParcelAbandonRequest OnParcelAbandonRequest;
+        public event ParcelReclaim OnParcelReclaim;
         public event ParcelReturnObjectsRequest OnParcelReturnObjectsRequest;
         public event ParcelAccessListRequest OnParcelAccessListRequest;
         public event ParcelAccessListUpdateRequest OnParcelAccessListUpdateRequest;