aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/OpenSim/Region/Environment/Scenes/SceneCommunicationService.cs
blob: 2b638e341c3b0c39de8048de7d157977cd6b0f91 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSim Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Collections.Generic;
using System.Net;
using System.Reflection;
using System.Threading;
using OpenMetaverse;
using OpenMetaverse.StructuredData;
using log4net;
using OpenSim.Framework;
using OpenSim.Framework.Communications;
using OpenSim.Region.Interfaces;
using OSD = OpenMetaverse.StructuredData.OSD;

namespace OpenSim.Region.Environment.Scenes
{
    public delegate void KiPrimitiveDelegate(uint localID);

    public delegate void RemoveKnownRegionsFromAvatarList(UUID avatarID, List<ulong> regionlst);

    public class SceneCommunicationService //one instance per region
    {
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        protected CommunicationsManager m_commsProvider;
        protected RegionInfo m_regionInfo;

        protected RegionCommsListener regionCommsHost;

        public event AgentCrossing OnAvatarCrossingIntoRegion;
        public event ExpectUserDelegate OnExpectUser;
        public event ExpectPrimDelegate OnExpectPrim;
        public event CloseAgentConnection OnCloseAgentConnection;
        public event PrimCrossing OnPrimCrossingIntoRegion;
        public event RegionUp OnRegionUp;
        public event ChildAgentUpdate OnChildAgentUpdate;
        public event RemoveKnownRegionsFromAvatarList OnRemoveKnownRegionFromAvatar;
        public event LogOffUser OnLogOffUser;
        public event GetLandData OnGetLandData;

        private AgentCrossing handlerAvatarCrossingIntoRegion = null; // OnAvatarCrossingIntoRegion;
        private ExpectUserDelegate handlerExpectUser = null; // OnExpectUser;
        private ExpectPrimDelegate handlerExpectPrim = null; // OnExpectPrim;
        private CloseAgentConnection handlerCloseAgentConnection = null; // OnCloseAgentConnection;
        private PrimCrossing handlerPrimCrossingIntoRegion = null; // OnPrimCrossingIntoRegion;
        private RegionUp handlerRegionUp = null; // OnRegionUp;
        private ChildAgentUpdate handlerChildAgentUpdate = null; // OnChildAgentUpdate;
        private RemoveKnownRegionsFromAvatarList handlerRemoveKnownRegionFromAvatar = null; // OnRemoveKnownRegionFromAvatar;
        private LogOffUser handlerLogOffUser = null;
        private GetLandData handlerGetLandData = null; // OnGetLandData

        public KiPrimitiveDelegate KiPrimitive;

        public SceneCommunicationService(CommunicationsManager commsMan)
        {
            m_commsProvider = commsMan;
        }

        /// <summary>
        /// Register a region with the grid
        /// </summary>
        /// <param name="regionInfos"></param>
        /// <exception cref="System.Exception">Thrown if region registration fails.</exception>
        public void RegisterRegion(RegionInfo regionInfos)
        {
            m_regionInfo = regionInfos;
            m_commsProvider.GridService.gdebugRegionName = regionInfos.RegionName;
            m_commsProvider.InterRegion.rdebugRegionName = regionInfos.RegionName;            
            regionCommsHost = m_commsProvider.GridService.RegisterRegion(m_regionInfo);

            if (regionCommsHost != null)
            {
                //m_log.Info("[INTER]: " + debugRegionName + ": SceneCommunicationService: registered with gridservice and got" + regionCommsHost.ToString());

                regionCommsHost.debugRegionName = regionInfos.RegionName;
                regionCommsHost.OnExpectPrim += IncomingPrimCrossing;
                regionCommsHost.OnExpectUser += NewUserConnection;
                regionCommsHost.OnAvatarCrossingIntoRegion += AgentCrossing;
                regionCommsHost.OnCloseAgentConnection += CloseConnection;
                regionCommsHost.OnRegionUp += newRegionUp;
                regionCommsHost.OnChildAgentUpdate += ChildAgentUpdate;
                regionCommsHost.OnLogOffUser += GridLogOffUser;
                regionCommsHost.OnGetLandData += FetchLandData;
            }
            else
            {
                //m_log.Info("[INTER]: " + debugRegionName + ": SceneCommunicationService: registered with gridservice and got null");
            }
        }

        public RegionInfo RequestClosestRegion(string name)
        {
            return m_commsProvider.GridService.RequestClosestRegion(name);
        }

        public void Close()
        {
            if (regionCommsHost != null)
            {
                regionCommsHost.OnLogOffUser -= GridLogOffUser;
                regionCommsHost.OnChildAgentUpdate -= ChildAgentUpdate;
                regionCommsHost.OnRegionUp -= newRegionUp;
                regionCommsHost.OnExpectUser -= NewUserConnection;
                regionCommsHost.OnExpectPrim -= IncomingPrimCrossing;
                regionCommsHost.OnAvatarCrossingIntoRegion -= AgentCrossing;
                regionCommsHost.OnCloseAgentConnection -= CloseConnection;
                regionCommsHost.OnGetLandData -= FetchLandData;
                
                try
                {
                    m_commsProvider.GridService.DeregisterRegion(m_regionInfo);
                }
                catch (Exception e)
                {
                    m_log.ErrorFormat(
                        "[GRID]: Deregistration of region {0} from the grid failed - {1}.  Continuing", 
                        m_regionInfo.RegionName, e);
                }
                
                regionCommsHost = null;
            }
        }

        #region CommsManager Event handlers

        /// <summary>
        ///
        /// </summary>
        /// <param name="regionHandle"></param>
        /// <param name="agent"></param>
        ///
        protected void NewUserConnection(AgentCircuitData agent)
        {
            handlerExpectUser = OnExpectUser;
            if (handlerExpectUser != null)
            {
                //m_log.Info("[INTER]: " + debugRegionName + ": SceneCommunicationService: OnExpectUser Fired for User:" + agent.firstname + " " + agent.lastname);
                handlerExpectUser(agent);
            }
        }

        protected void GridLogOffUser(UUID AgentID, UUID RegionSecret, string message)
        {
            handlerLogOffUser = OnLogOffUser;
            if (handlerLogOffUser != null)
            {
                handlerLogOffUser(AgentID, RegionSecret, message);
            }
        }

        protected bool newRegionUp(RegionInfo region)
        {
            handlerRegionUp = OnRegionUp;
            if (handlerRegionUp != null)
            {
                //m_log.Info("[INTER]: " + debugRegionName + ": SceneCommunicationService: newRegionUp Fired for User:" + region.RegionName);
                handlerRegionUp(region);
            }
            return true;
        }

        protected bool ChildAgentUpdate(ChildAgentDataUpdate cAgentData)
        {
            handlerChildAgentUpdate = OnChildAgentUpdate;
            if (handlerChildAgentUpdate != null)
                handlerChildAgentUpdate(cAgentData);


            return true;
        }

        protected void AgentCrossing(UUID agentID, Vector3 position, bool isFlying)
        {
            handlerAvatarCrossingIntoRegion = OnAvatarCrossingIntoRegion;
            if (handlerAvatarCrossingIntoRegion != null)
            {
                handlerAvatarCrossingIntoRegion(agentID, position, isFlying);
            }
        }

        protected bool IncomingPrimCrossing(UUID primID, String objXMLData, int XMLMethod)
        {
            handlerExpectPrim = OnExpectPrim;
            if (handlerExpectPrim != null)
            {
                return handlerExpectPrim(primID, objXMLData, XMLMethod);
            }
            else
            {
                return false;
            }

        }

        protected void PrimCrossing(UUID primID, Vector3 position, bool isPhysical)
        {
            handlerPrimCrossingIntoRegion = OnPrimCrossingIntoRegion;
            if (handlerPrimCrossingIntoRegion != null)
            {
                handlerPrimCrossingIntoRegion(primID, position, isPhysical);
            }
        }

        protected bool CloseConnection(UUID agentID)
        {
            m_log.Debug("[INTERREGION]: Incoming Agent Close Request for agent: " + agentID);

            handlerCloseAgentConnection = OnCloseAgentConnection;
            if (handlerCloseAgentConnection != null)
            {
                return handlerCloseAgentConnection(agentID);
            }
            
            return false;
        }

        protected LandData FetchLandData(uint x, uint y)
        {
            handlerGetLandData = OnGetLandData;
            if (handlerGetLandData != null)
            {
                return handlerGetLandData(x, y);
            }
            return null;
        }

        #endregion

        #region Inform Client of Neighbours

        private delegate void InformClientOfNeighbourDelegate(
            ScenePresence avatar, AgentCircuitData a, ulong regionHandle, IPEndPoint endPoint);

        private void InformClientOfNeighbourCompleted(IAsyncResult iar)
        {
            InformClientOfNeighbourDelegate icon = (InformClientOfNeighbourDelegate) iar.AsyncState;
            icon.EndInvoke(iar);
        }

        /// <summary>
        /// Async component for informing client of which neighbours exist
        /// </summary>
        /// <remarks>
        /// This needs to run asynchronesously, as a network timeout may block the thread for a long while
        /// </remarks>
        /// <param name="remoteClient"></param>
        /// <param name="a"></param>
        /// <param name="regionHandle"></param>
        /// <param name="endPoint"></param>
        private void InformClientOfNeighbourAsync(ScenePresence avatar, AgentCircuitData a, ulong regionHandle,
                                                  IPEndPoint endPoint)
        {
            m_log.Info("[INTERGRID]: Starting to inform client about neighbours");
            bool regionAccepted = m_commsProvider.InterRegion.InformRegionOfChildAgent(regionHandle, a);

            if (regionAccepted)
            {
                IEventQueue eq = avatar.Scene.RequestModuleInterface<IEventQueue>();
                if (eq != null)
                {
                    OSD Item = EventQueueHelper.EnableSimulator(regionHandle, endPoint);
                    eq.Enqueue(Item, avatar.UUID);
                }
                else
                {
                    avatar.ControllingClient.InformClientOfNeighbour(regionHandle, endPoint);
                    // TODO: make Event Queue disablable!
                }
                
                avatar.AddNeighbourRegion(regionHandle);
                m_log.Info("[INTERGRID]: Completed inform client about neighbours");
            }
        }

        public void RequestNeighbors(RegionInfo region)
        {
            // List<SimpleRegionInfo> neighbours =
            m_commsProvider.GridService.RequestNeighbours(m_regionInfo.RegionLocX, m_regionInfo.RegionLocY);
            //IPEndPoint blah = new IPEndPoint();

            //blah.Address = region.RemotingAddress;
            //blah.Port = region.RemotingPort;
        }

        /// <summary>
        /// This informs all neighboring regions about agent "avatar".
        /// Calls an asynchronous method to do so..  so it doesn't lag the sim.
        /// </summary>
        public void EnableNeighbourChildAgents(ScenePresence avatar, List<RegionInfo> lstneighbours)
        {
            List<SimpleRegionInfo> neighbours = new List<SimpleRegionInfo>();

            //m_commsProvider.GridService.RequestNeighbours(m_regionInfo.RegionLocX, m_regionInfo.RegionLocY);
            for (int i = 0; i < lstneighbours.Count; i++)
            {
                // We don't want to keep sending to regions that consistently fail on comms.
                if (!(lstneighbours[i].commFailTF))
                {
                    neighbours.Add(new SimpleRegionInfo(lstneighbours[i]));
                }
            }
            // we're going to be using the above code once neighbour cache is correct.  Currently it doesn't appear to be
            // So we're temporarily going back to the old method of grabbing it from the Grid Server Every time :/
            neighbours =
                m_commsProvider.GridService.RequestNeighbours(m_regionInfo.RegionLocX, m_regionInfo.RegionLocY);

            if (neighbours != null)
            {
                for (int i = 0; i < neighbours.Count; i++)
                {
                    AgentCircuitData agent = avatar.ControllingClient.RequestClientInfo();
                    agent.BaseFolder = UUID.Zero;
                    agent.InventoryFolder = UUID.Zero;
                    agent.startpos = new Vector3(128, 128, 70);
                    agent.child = true;

                    InformClientOfNeighbourDelegate d = InformClientOfNeighbourAsync;

                    try
                    {
                        d.BeginInvoke(avatar, agent, neighbours[i].RegionHandle, neighbours[i].ExternalEndPoint,
                                      InformClientOfNeighbourCompleted,
                                      d);
                    }
                    catch (Exception e)
                    {
                        m_log.ErrorFormat(
                            "[REGIONINFO]: Could not resolve external hostname {0} for region {1} ({2}, {3}).  {4}",
                            neighbours[i].ExternalHostName,
                            neighbours[i].RegionHandle,
                            neighbours[i].RegionLocX,
                            neighbours[i].RegionLocY,
                            e);

                        // FIXME: Okay, even though we've failed, we're still going to throw the exception on,
                        // since I don't know what will happen if we just let the client continue

                        // XXX: Well, decided to swallow the exception instead for now.  Let us see how that goes.
                        // throw e;

                    }
                }
            }
        }

        /// <summary>
        /// This informs a single neighboring region about agent "avatar".
        /// Calls an asynchronous method to do so..  so it doesn't lag the sim.
        /// </summary>
        public void InformNeighborChildAgent(ScenePresence avatar, RegionInfo region, List<RegionInfo> neighbours)
        {
            AgentCircuitData agent = avatar.ControllingClient.RequestClientInfo();
            agent.BaseFolder = UUID.Zero;
            agent.InventoryFolder = UUID.Zero;
            agent.startpos = new Vector3(128, 128, 70);
            agent.child = true;

            InformClientOfNeighbourDelegate d = InformClientOfNeighbourAsync;
            d.BeginInvoke(avatar, agent, region.RegionHandle, region.ExternalEndPoint,
                          InformClientOfNeighbourCompleted,
                          d);
        }

        #endregion

        public delegate void InformNeighbourThatRegionUpDelegate(RegionInfo region, ulong regionhandle);

        private void InformNeighborsThatRegionisUpCompleted(IAsyncResult iar)
        {
            InformNeighbourThatRegionUpDelegate icon = (InformNeighbourThatRegionUpDelegate) iar.AsyncState;
            icon.EndInvoke(iar);
        }

        /// <summary>
        /// Asynchronous call to information neighbouring regions that this region is up
        /// </summary>
        /// <param name="region"></param>
        /// <param name="regionhandle"></param>
        private void InformNeighboursThatRegionIsUpAsync(RegionInfo region, ulong regionhandle)
        {
            m_log.Info("[INTERGRID]: Starting to inform neighbors that I'm here");
            //RegionUpData regiondata = new RegionUpData(region.RegionLocX, region.RegionLocY, region.ExternalHostName, region.InternalEndPoint.Port);

            bool regionAccepted =
                m_commsProvider.InterRegion.RegionUp(new SerializableRegionInfo(region), regionhandle);

            if (regionAccepted)
            {
                m_log.Info("[INTERGRID]: Completed informing neighbors that I'm here");
                handlerRegionUp = OnRegionUp;

                // yes, we're notifying ourselves.
                if (handlerRegionUp != null)
                    handlerRegionUp(region);
            }
            else
            {
                m_log.Warn("[INTERGRID]: Failed to inform neighbors that I'm here.");
            }
        }

        /// <summary>
        /// Called by scene when region is initialized (not always when it's listening for agents)
        /// This is an inter-region message that informs the surrounding neighbors that the sim is up.
        /// </summary>
        public void InformNeighborsThatRegionisUp(RegionInfo region)
        {
            //m_log.Info("[INTER]: " + debugRegionName + ": SceneCommunicationService: Sending InterRegion Notification that region is up " + region.RegionName);


            List<SimpleRegionInfo> neighbours = new List<SimpleRegionInfo>();
            // This stays uncached because we don't already know about our neighbors at this point.
            neighbours = m_commsProvider.GridService.RequestNeighbours(m_regionInfo.RegionLocX, m_regionInfo.RegionLocY);
            if (neighbours != null)
            {
                for (int i = 0; i < neighbours.Count; i++)
                {
                    InformNeighbourThatRegionUpDelegate d = InformNeighboursThatRegionIsUpAsync;

                    d.BeginInvoke(region, neighbours[i].RegionHandle,
                                  InformNeighborsThatRegionisUpCompleted,
                                  d);
                }
            }

            //bool val = m_commsProvider.InterRegion.RegionUp(new SerializableRegionInfo(region));
        }

        public delegate void SendChildAgentDataUpdateDelegate(ChildAgentDataUpdate cAgentData, ScenePresence presence);

        /// <summary>
        /// This informs all neighboring regions about the settings of it's child agent.
        /// Calls an asynchronous method to do so..  so it doesn't lag the sim.
        ///
        /// This contains information, such as, Draw Distance, Camera location, Current Position, Current throttle settings, etc.
        ///
        /// </summary>
        private void SendChildAgentDataUpdateAsync(ChildAgentDataUpdate cAgentData, ScenePresence presence)
        {
            //m_log.Info("[INTERGRID]: Informing neighbors about my agent.");
            try
            {
                foreach (ulong regionHandle in presence.KnownChildRegions)
                {
                    bool regionAccepted = m_commsProvider.InterRegion.ChildAgentUpdate(regionHandle, cAgentData);

                    if (regionAccepted)
                    {
                        //m_log.Info("[INTERGRID]: Completed sending a neighbor an update about my agent");
                    }
                    else
                    {
                        //m_log.Info("[INTERGRID]: Failed sending a neighbor an update about my agent");
                    }
                }
            }
            catch (InvalidOperationException)
            {
                // We're ignoring a collection was modified error because this data gets old and outdated fast.
            }

        }

        private void SendChildAgentDataUpdateCompleted(IAsyncResult iar)
        {
            SendChildAgentDataUpdateDelegate icon = (SendChildAgentDataUpdateDelegate) iar.AsyncState;
            icon.EndInvoke(iar);
        }

        public void SendChildAgentDataUpdate(ChildAgentDataUpdate cAgentData, ScenePresence presence)
        {
            // This assumes that we know what our neighbors are.
            SendChildAgentDataUpdateDelegate d = SendChildAgentDataUpdateAsync;
            d.BeginInvoke(cAgentData,presence,
                          SendChildAgentDataUpdateCompleted,
                          d);
        }

        public delegate void SendCloseChildAgentDelegate(UUID agentID, List<ulong> regionlst);

        /// <summary>
        /// This Closes child agents on neighboring regions
        /// Calls an asynchronous method to do so..  so it doesn't lag the sim.
        /// </summary>
        private void SendCloseChildAgentAsync(UUID agentID, List<ulong> regionlst)
        {

            foreach (ulong regionHandle in regionlst)
            {
                bool regionAccepted = m_commsProvider.InterRegion.TellRegionToCloseChildConnection(regionHandle, agentID);

                if (regionAccepted)
                {
                    m_log.Info("[INTERGRID]: Completed sending agent Close agent Request to neighbor");

                }
                else
                {
                    m_log.Info("[INTERGRID]: Failed sending agent Close agent Request to neighbor");

                }

            }
            // We remove the list of known regions from the agent's known region list through an event
            // to scene, because, if an agent logged of, it's likely that there will be no scene presence
            // by the time we get to this part of the method.
            handlerRemoveKnownRegionFromAvatar = OnRemoveKnownRegionFromAvatar;
            if (handlerRemoveKnownRegionFromAvatar != null)
            {
                handlerRemoveKnownRegionFromAvatar(agentID, regionlst);
            }
        }

        private void SendCloseChildAgentCompleted(IAsyncResult iar)
        {
            SendCloseChildAgentDelegate icon = (SendCloseChildAgentDelegate)iar.AsyncState;
            icon.EndInvoke(iar);
        }

        public void SendCloseChildAgentConnections(UUID agentID, List<ulong> regionslst)
        {
            // This assumes that we know what our neighbors are.
            SendCloseChildAgentDelegate d = SendCloseChildAgentAsync;
            d.BeginInvoke(agentID, regionslst,
                          SendCloseChildAgentCompleted,
                          d);
        }

        /// <summary>
        /// Helper function to request neighbors from grid-comms
        /// </summary>
        /// <param name="regionHandle"></param>
        /// <returns></returns>
        public virtual RegionInfo RequestNeighbouringRegionInfo(ulong regionHandle)
        {
            //m_log.Info("[INTER]: " + debugRegionName + ": SceneCommunicationService: Sending Grid Services Request about neighbor " + regionHandle.ToString());
            return m_commsProvider.GridService.RequestNeighbourInfo(regionHandle);
        }

        /// <summary>
        /// Helper function to request neighbors from grid-comms
        /// </summary>
        /// <param name="regionID"></param>
        /// <returns></returns>
        public virtual RegionInfo RequestNeighbouringRegionInfo(UUID regionID)
        {
            //m_log.Info("[INTER]: " + debugRegionName + ": SceneCommunicationService: Sending Grid Services Request about neighbor " + regionID);
            return m_commsProvider.GridService.RequestNeighbourInfo(regionID);
        }

        /// <summary>
        /// Requests map blocks in area of minX, maxX, minY, MaxY in world cordinates
        /// </summary>
        /// <param name="minX"></param>
        /// <param name="minY"></param>
        /// <param name="maxX"></param>
        /// <param name="maxY"></param>
        public virtual void RequestMapBlocks(IClientAPI remoteClient, int minX, int minY, int maxX, int maxY)
        {
            List<MapBlockData> mapBlocks;
            mapBlocks = m_commsProvider.GridService.RequestNeighbourMapBlocks(minX - 4, minY - 4, minX + 4, minY + 4);
            remoteClient.SendMapBlock(mapBlocks, 0);
        }

        /// <summary>
        /// Try to teleport an agent to a new region.
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="RegionHandle"></param>
        /// <param name="position"></param>
        /// <param name="lookAt"></param>
        /// <param name="flags"></param>
        public virtual void RequestTeleportToLocation(ScenePresence avatar, ulong regionHandle, Vector3 position,
                                                      Vector3 lookAt, uint teleportFlags)
        {
            if (!avatar.Scene.Permissions.CanTeleport(avatar.UUID))
                return;

            bool destRegionUp = false;

            IEventQueue eq = avatar.Scene.RequestModuleInterface<IEventQueue>();

            if (regionHandle == m_regionInfo.RegionHandle)
            {
                // Teleport within the same region
                if (position.X < 0 || position.X > Constants.RegionSize || position.Y < 0 || position.Y > Constants.RegionSize || position.Z < 0)
                {
                    Vector3 emergencyPos = new Vector3(128, 128, 128);

                    m_log.WarnFormat(
                        "[SCENE COMMUNICATION SERVICE]: RequestTeleportToLocation() was given an illegal position of {0} for avatar {1}, {2}.  Substituting {3}",
                        position, avatar.Name, avatar.UUID, emergencyPos);
                    position = emergencyPos;
                }
                // TODO: Get proper AVG Height
                float localAVHeight = 1.56f;
                float posZLimit = (float)avatar.Scene.GetLandHeight((int)position.X, (int)position.Y);
                float newPosZ = posZLimit + localAVHeight;
                if (posZLimit >= (position.Z - (localAVHeight / 2)) && !(Single.IsInfinity(newPosZ) || Single.IsNaN(newPosZ)))
                {
                    position.Z = newPosZ;
                }

                // Only send this if the event queue is null
                if (eq == null)
                    avatar.ControllingClient.SendTeleportLocationStart();

                
                avatar.ControllingClient.SendLocalTeleport(position, lookAt, teleportFlags);
                avatar.Teleport(position);
            }
            else
            {
                RegionInfo reg = RequestNeighbouringRegionInfo(regionHandle);
                if (reg != null)
                {
                    if (eq == null)
                        avatar.ControllingClient.SendTeleportLocationStart();

                    AgentCircuitData agent = avatar.ControllingClient.RequestClientInfo();
                    agent.BaseFolder = UUID.Zero;
                    agent.InventoryFolder = UUID.Zero;
                    agent.startpos = position;
                    agent.child = true;

                    if (reg.RemotingAddress != "" && reg.RemotingPort != 0)
                    {
                        // region is remote. see if it is up
                        destRegionUp = m_commsProvider.InterRegion.CheckRegion(reg.RemotingAddress, reg.RemotingPort);
                    }
                    else
                    {
                        // assume local regions are always up
                        destRegionUp = true;
                    }

                    if (destRegionUp)
                    {

                        // Fixing a bug where teleporting while sitting results in the avatar ending up removed from
                        // both regions
                        if (avatar.ParentID != (uint)0)
                            avatar.StandUp();
                        if (!avatar.ValidateAttachments())
                        {
                            avatar.ControllingClient.SendTeleportFailed("Inconsistent attachment state");
                            return;
                        }

                        // the avatar.Close below will clear the child region list. We need this below for (possibly)
                        // closing the child agents, so save it here (we need a copy as it is Clear()-ed).
                        List<ulong> childRegions = new List<ulong>(avatar.GetKnownRegionList());
                        // Compared to ScenePresence.CrossToNewRegion(), there's no obvious code to handle a teleport
                        // failure at this point (unlike a border crossing failure).  So perhaps this can never fail
                        // once we reach here...
                        avatar.Scene.RemoveCapsHandler(avatar.UUID);
                        agent.child = false;
                        m_commsProvider.InterRegion.InformRegionOfChildAgent(reg.RegionHandle, agent);

                        if (eq != null)
                        {
                            OSD Item = EventQueueHelper.EnableSimulator(reg.RegionHandle, reg.ExternalEndPoint);
                            eq.Enqueue(Item, avatar.UUID);
                        }
                        else
                        {
                            avatar.ControllingClient.InformClientOfNeighbour(reg.RegionHandle, reg.ExternalEndPoint);
                        }
                        
                        m_commsProvider.InterRegion.ExpectAvatarCrossing(reg.RegionHandle, avatar.ControllingClient.AgentId,
                                                                     position, false);
                        Thread.Sleep(2000);
                        AgentCircuitData circuitdata = avatar.ControllingClient.RequestClientInfo();

                        // TODO Should construct this behind a method
                        string capsPath =
                            "http://" + reg.ExternalHostName + ":" + reg.HttpPort
                            + "/CAPS/" + circuitdata.CapsPath + "0000/";

                        m_log.DebugFormat(
                            "[CAPS]: Sending new CAPS seed url {0} to client {1}", capsPath, avatar.UUID);

                        
                        if (eq != null)
                        {
                            OSD Item = EventQueueHelper.TeleportFinishEvent(reg.RegionHandle, 13, reg.ExternalEndPoint,
                                                                             4, teleportFlags, capsPath, avatar.UUID);
                            eq.Enqueue(Item, avatar.UUID);
                        }
                        else
                        {
                            avatar.ControllingClient.SendRegionTeleport(reg.RegionHandle, 13, reg.ExternalEndPoint, 4,
                                                                        teleportFlags, capsPath);
                        }

                        avatar.MakeChildAgent();
                        Thread.Sleep(7000);
                        avatar.CrossAttachmentsIntoNewRegion(reg.RegionHandle, true);
                        if (KiPrimitive != null)
                        {
                            KiPrimitive(avatar.LocalId);
                        }

                        avatar.Close();

                        uint newRegionX = (uint)(reg.RegionHandle >> 40);
                        uint newRegionY = (((uint)(reg.RegionHandle)) >> 8);
                        uint oldRegionX = (uint)(m_regionInfo.RegionHandle >> 40);
                        uint oldRegionY = (((uint)(m_regionInfo.RegionHandle)) >> 8);

                        if (Util.fast_distance2d((int)(newRegionX - oldRegionX), (int)(newRegionY - oldRegionY)) > 3)
                        {
                            //SendCloseChildAgentConnections(avatar.UUID,avatar.GetKnownRegionList());
                            SendCloseChildAgentConnections(avatar.UUID, childRegions);
                            CloseConnection(avatar.UUID);
                        }

                        // if (teleport success) // seems to be always success here
                        // the user may change their profile information in other region,
                        // so the userinfo in UserProfileCache is not reliable any more, delete it
                        if (avatar.Scene.NeedSceneCacheClear(avatar.UUID))
                            m_commsProvider.UserProfileCacheService.RemoveUser(avatar.UUID);
                        m_log.InfoFormat("User {0} is going to another region, profile cache removed", avatar.UUID);
                    }
                    else
                    {
                        avatar.ControllingClient.SendTeleportFailed("Remote Region appears to be down");
                    }
                }
                else
                {
                    // TP to a place that doesn't exist (anymore)
                    // Inform the viewer about that
                    avatar.ControllingClient.SendTeleportFailed("The region you tried to teleport to doesn't exist anymore");
                    
                    // and set the map-tile to '(Offline)'
                    uint regX, regY;
                    Utils.LongToUInts(regionHandle, out regX, out regY);
                    
                    MapBlockData block = new MapBlockData();
                    block.X = (ushort)(regX / Constants.RegionSize);
                    block.Y = (ushort)(regY / Constants.RegionSize);
                    block.Access = 254; // == not there
                    
                    List<MapBlockData> blocks = new List<MapBlockData>();
                    blocks.Add(block);
                    avatar.ControllingClient.SendMapBlock(blocks, 0);
                }
            }
        }

        /// <summary>
        /// Inform a neighbouring region that an avatar is about to cross into it.
        /// </summary>
        /// <param name="regionhandle"></param>
        /// <param name="agentID"></param>
        /// <param name="position"></param>
        public bool CrossToNeighbouringRegion(ulong regionhandle, UUID agentID, Vector3 position, bool isFlying)
        {
            return m_commsProvider.InterRegion.ExpectAvatarCrossing(regionhandle, agentID, position, isFlying);
        }

        public bool PrimCrossToNeighboringRegion(ulong regionhandle, UUID primID, string objData, int XMLMethod)
        {
            return m_commsProvider.InterRegion.InformRegionOfPrimCrossing(regionhandle, primID, objData, XMLMethod);
        }

        public Dictionary<string, string> GetGridSettings()
        {
            return m_commsProvider.GridService.GetGridSettings();
        }

        public void LogOffUser(UUID userid, UUID regionid, ulong regionhandle, Vector3 position, Vector3 lookat)
        {
            m_commsProvider.LogOffUser(userid, regionid, regionhandle, position, lookat);
        }

        // deprecated as of 2008-08-27
        public void LogOffUser(UUID userid, UUID regionid, ulong regionhandle, float posx, float posy, float posz)
        {
             m_commsProvider.LogOffUser(userid, regionid, regionhandle, posx, posy, posz);
        }

        public void ClearUserAgent(UUID avatarID)
        {
            m_commsProvider.UserService.ClearUserAgent(avatarID);
        }

        public void AddNewUserFriend(UUID friendlistowner, UUID friend, uint perms)
        {
            m_commsProvider.AddNewUserFriend(friendlistowner, friend, perms);
        }

        public void UpdateUserFriendPerms(UUID friendlistowner, UUID friend, uint perms)
        {
            m_commsProvider.UpdateUserFriendPerms(friendlistowner, friend, perms);
        }

        public void RemoveUserFriend(UUID friendlistowner, UUID friend)
        {
            m_commsProvider.RemoveUserFriend(friendlistowner, friend);
        }

        public List<FriendListItem> GetUserFriendList(UUID friendlistowner)
        {
            return m_commsProvider.GetUserFriendList(friendlistowner);
        }

        public  List<MapBlockData> RequestNeighbourMapBlocks(int minX, int minY, int maxX, int maxY)
        {
            return m_commsProvider.GridService.RequestNeighbourMapBlocks(minX, minY, maxX, maxY);
        }

        public List<AvatarPickerAvatar> GenerateAgentPickerRequestResponse(UUID queryID, string query)
        {
            return m_commsProvider.GenerateAgentPickerRequestResponse(queryID, query);
        }
        
        public List<RegionInfo> RequestNamedRegions(string name, int maxNumber)
        {
            return m_commsProvider.GridService.RequestNamedRegions(name, maxNumber);
        }
    }
}