forked from project-chip/connectedhomeip
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathInteractionModelEngine.cpp
2169 lines (1863 loc) · 86.3 KB
/
InteractionModelEngine.cpp
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
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
*
* Copyright (c) 2020-2021 Project CHIP Authors
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file
* This file defines objects for a CHIP Interaction Data model Engine which handle unsolicited IM message, and
* manage different kinds of IM client and handlers.
*
*/
#include "InteractionModelEngine.h"
#include <cinttypes>
#include <access/AccessRestrictionProvider.h>
#include <access/Privilege.h>
#include <access/RequestPath.h>
#include <access/SubjectDescriptor.h>
#include <app/AppConfig.h>
#include <app/CommandHandlerInterfaceRegistry.h>
#include <app/ConcreteClusterPath.h>
#include <app/EventPathParams.h>
#include <app/RequiredPrivilege.h>
#include <app/data-model-provider/ActionReturnStatus.h>
#include <app/data-model-provider/MetadataList.h>
#include <app/data-model-provider/MetadataLookup.h>
#include <app/data-model-provider/MetadataTypes.h>
#include <app/data-model-provider/OperationTypes.h>
#include <app/data-model/List.h>
#include <app/util/IMClusterCommandHandler.h>
#include <app/util/af-types.h>
#include <app/util/endpoint-config-api.h>
#include <lib/core/CHIPError.h>
#include <lib/core/DataModelTypes.h>
#include <lib/core/Global.h>
#include <lib/core/TLVUtilities.h>
#include <lib/support/CHIPFaultInjection.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/FibonacciUtils.h>
#include <protocols/interaction_model/StatusCode.h>
namespace chip {
namespace app {
namespace {
/**
* Helper to handle wildcard events in the event path.
*
* Validates that ACL access is permitted to:
* - Cluster::View in case the path is a wildcard for the event id
* - Event read if the path is a concrete event path
*/
bool MayHaveAccessibleEventPathForEndpointAndCluster(const ConcreteClusterPath & path, const EventPathParams & aEventPath,
const Access::SubjectDescriptor & aSubjectDescriptor)
{
Access::RequestPath requestPath{ .cluster = path.mClusterId,
.endpoint = path.mEndpointId,
.requestType = Access::RequestType::kEventReadRequest };
Access::Privilege requiredPrivilege = Access::Privilege::kView;
if (!aEventPath.HasWildcardEventId())
{
requestPath.entityId = aEventPath.mEventId;
requiredPrivilege =
RequiredPrivilege::ForReadEvent(ConcreteEventPath(path.mEndpointId, path.mClusterId, aEventPath.mEventId));
}
return (Access::GetAccessControl().Check(aSubjectDescriptor, requestPath, requiredPrivilege) == CHIP_NO_ERROR);
}
bool MayHaveAccessibleEventPathForEndpoint(DataModel::Provider * aProvider, EndpointId aEndpoint,
const EventPathParams & aEventPath, const Access::SubjectDescriptor & aSubjectDescriptor)
{
if (!aEventPath.HasWildcardClusterId())
{
return MayHaveAccessibleEventPathForEndpointAndCluster(ConcreteClusterPath(aEndpoint, aEventPath.mClusterId), aEventPath,
aSubjectDescriptor);
}
for (auto & cluster : aProvider->ServerClustersIgnoreError(aEventPath.mEndpointId))
{
if (MayHaveAccessibleEventPathForEndpointAndCluster(ConcreteClusterPath(aEventPath.mEndpointId, cluster.clusterId),
aEventPath, aSubjectDescriptor))
{
return true;
}
}
return false;
}
bool MayHaveAccessibleEventPath(DataModel::Provider * aProvider, const EventPathParams & aEventPath,
const Access::SubjectDescriptor & subjectDescriptor)
{
VerifyOrReturnValue(aProvider != nullptr, false);
if (!aEventPath.HasWildcardEndpointId())
{
return MayHaveAccessibleEventPathForEndpoint(aProvider, aEventPath.mEndpointId, aEventPath, subjectDescriptor);
}
for (const DataModel::EndpointEntry & ep : aProvider->EndpointsIgnoreError())
{
if (MayHaveAccessibleEventPathForEndpoint(aProvider, ep.id, aEventPath, subjectDescriptor))
{
return true;
}
}
return false;
}
} // namespace
class AutoReleaseSubscriptionInfoIterator
{
public:
AutoReleaseSubscriptionInfoIterator(SubscriptionResumptionStorage::SubscriptionInfoIterator * iterator) : mIterator(iterator){};
~AutoReleaseSubscriptionInfoIterator() { mIterator->Release(); }
SubscriptionResumptionStorage::SubscriptionInfoIterator * operator->() const { return mIterator; }
private:
SubscriptionResumptionStorage::SubscriptionInfoIterator * mIterator;
};
using Protocols::InteractionModel::Status;
Global<InteractionModelEngine> sInteractionModelEngine;
InteractionModelEngine::InteractionModelEngine() : mReportingEngine(this) {}
InteractionModelEngine * InteractionModelEngine::GetInstance()
{
return &sInteractionModelEngine.get();
}
CHIP_ERROR InteractionModelEngine::Init(Messaging::ExchangeManager * apExchangeMgr, FabricTable * apFabricTable,
reporting::ReportScheduler * reportScheduler, CASESessionManager * apCASESessionMgr,
SubscriptionResumptionStorage * subscriptionResumptionStorage,
EventManagement * eventManagement)
{
VerifyOrReturnError(apFabricTable != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
VerifyOrReturnError(apExchangeMgr != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
VerifyOrReturnError(reportScheduler != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
mState = State::kInitializing;
mpExchangeMgr = apExchangeMgr;
mpFabricTable = apFabricTable;
mpCASESessionMgr = apCASESessionMgr;
mpSubscriptionResumptionStorage = subscriptionResumptionStorage;
mReportScheduler = reportScheduler;
ReturnErrorOnFailure(mpFabricTable->AddFabricDelegate(this));
ReturnErrorOnFailure(mpExchangeMgr->RegisterUnsolicitedMessageHandlerForProtocol(Protocols::InteractionModel::Id, this));
mReportingEngine.Init((eventManagement != nullptr) ? eventManagement : &EventManagement::GetInstance());
StatusIB::RegisterErrorFormatter();
mState = State::kInitialized;
return CHIP_NO_ERROR;
}
void InteractionModelEngine::Shutdown()
{
VerifyOrReturn(State::kUninitialized != mState);
mpExchangeMgr->GetSessionManager()->SystemLayer()->CancelTimer(ResumeSubscriptionsTimerCallback, this);
// TODO: individual object clears the entire command handler interface registry.
// This may not be expected as IME does NOT own the command handler interface registry.
//
// This is to be cleaned up once InteractionModelEngine maintains a data model fully and
// the code-generation model can do its clear in its shutdown method.
CommandHandlerInterfaceRegistry::Instance().UnregisterAllHandlers();
mCommandResponderObjs.ReleaseAll();
mTimedHandlers.ForEachActiveObject([this](TimedHandler * obj) -> Loop {
mpExchangeMgr->CloseAllContextsForDelegate(obj);
return Loop::Continue;
});
mTimedHandlers.ReleaseAll();
mReadHandlers.ReleaseAll();
#if CHIP_CONFIG_ENABLE_READ_CLIENT
// Shut down any subscription clients that are still around. They won't be
// able to work after this point anyway, since we're about to drop our refs
// to them.
ShutdownAllSubscriptions();
//
// We hold weak references to ReadClient objects. The application ultimately
// actually owns them, so it's on them to eventually shut them down and free them
// up.
//
// However, we should null out their pointers back to us at the very least so that
// at destruction time, they won't attempt to reach back here to remove themselves
// from this list.
//
for (auto * readClient = mpActiveReadClientList; readClient != nullptr;)
{
readClient->mpImEngine = nullptr;
auto * tmpClient = readClient->GetNextClient();
readClient->SetNextClient(nullptr);
readClient = tmpClient;
}
//
// After that, we just null out our tracker.
//
mpActiveReadClientList = nullptr;
#endif // CHIP_CONFIG_ENABLE_READ_CLIENT
for (auto & writeHandler : mWriteHandlers)
{
if (!writeHandler.IsFree())
{
writeHandler.Close();
}
}
mReportingEngine.Shutdown();
mAttributePathPool.ReleaseAll();
mEventPathPool.ReleaseAll();
mDataVersionFilterPool.ReleaseAll();
mpExchangeMgr->UnregisterUnsolicitedMessageHandlerForProtocol(Protocols::InteractionModel::Id);
mpCASESessionMgr = nullptr;
//
// We _should_ be clearing these out, but doing so invites a world
// of trouble. #21233 tracks fixing the underlying assumptions to make
// this possible.
//
// mpFabricTable = nullptr;
// mpExchangeMgr = nullptr;
mState = State::kUninitialized;
}
uint32_t InteractionModelEngine::GetNumActiveReadHandlers() const
{
return static_cast<uint32_t>(mReadHandlers.Allocated());
}
uint32_t InteractionModelEngine::GetNumActiveReadHandlers(ReadHandler::InteractionType aType) const
{
uint32_t count = 0;
mReadHandlers.ForEachActiveObject([aType, &count](const ReadHandler * handler) {
if (handler->IsType(aType))
{
count++;
}
return Loop::Continue;
});
return count;
}
uint32_t InteractionModelEngine::GetNumActiveReadHandlers(ReadHandler::InteractionType aType, FabricIndex aFabricIndex) const
{
uint32_t count = 0;
mReadHandlers.ForEachActiveObject([aType, aFabricIndex, &count](const ReadHandler * handler) {
if (handler->IsType(aType) && handler->GetAccessingFabricIndex() == aFabricIndex)
{
count++;
}
return Loop::Continue;
});
return count;
}
ReadHandler * InteractionModelEngine::ActiveHandlerAt(unsigned int aIndex)
{
if (aIndex >= mReadHandlers.Allocated())
{
return nullptr;
}
unsigned int i = 0;
ReadHandler * ret = nullptr;
mReadHandlers.ForEachActiveObject([aIndex, &i, &ret](ReadHandler * handler) {
if (i == aIndex)
{
ret = handler;
return Loop::Break;
}
i++;
return Loop::Continue;
});
return ret;
}
WriteHandler * InteractionModelEngine::ActiveWriteHandlerAt(unsigned int aIndex)
{
unsigned int i = 0;
for (auto & writeHandler : mWriteHandlers)
{
if (!writeHandler.IsFree())
{
if (i == aIndex)
{
return &writeHandler;
}
i++;
}
}
return nullptr;
}
uint32_t InteractionModelEngine::GetNumActiveWriteHandlers() const
{
uint32_t numActive = 0;
for (auto & writeHandler : mWriteHandlers)
{
if (!writeHandler.IsFree())
{
numActive++;
}
}
return numActive;
}
#if CHIP_CONFIG_ENABLE_READ_CLIENT
CHIP_ERROR InteractionModelEngine::ShutdownSubscription(const ScopedNodeId & aPeerNodeId, SubscriptionId aSubscriptionId)
{
assertChipStackLockedByCurrentThread();
for (auto * readClient = mpActiveReadClientList; readClient != nullptr;)
{
// Grab the next client now, because we might be about to delete readClient.
auto * nextClient = readClient->GetNextClient();
if (readClient->IsSubscriptionType() && readClient->IsMatchingSubscriptionId(aSubscriptionId) &&
readClient->GetFabricIndex() == aPeerNodeId.GetFabricIndex() && readClient->GetPeerNodeId() == aPeerNodeId.GetNodeId())
{
readClient->Close(CHIP_NO_ERROR);
return CHIP_NO_ERROR;
}
readClient = nextClient;
}
return CHIP_ERROR_KEY_NOT_FOUND;
}
void InteractionModelEngine::ShutdownSubscriptions(FabricIndex aFabricIndex, NodeId aPeerNodeId)
{
assertChipStackLockedByCurrentThread();
ShutdownMatchingSubscriptions(MakeOptional(aFabricIndex), MakeOptional(aPeerNodeId));
}
void InteractionModelEngine::ShutdownSubscriptions(FabricIndex aFabricIndex)
{
assertChipStackLockedByCurrentThread();
ShutdownMatchingSubscriptions(MakeOptional(aFabricIndex));
}
void InteractionModelEngine::ShutdownAllSubscriptions()
{
assertChipStackLockedByCurrentThread();
ShutdownMatchingSubscriptions();
}
void InteractionModelEngine::ShutdownMatchingSubscriptions(const Optional<FabricIndex> & aFabricIndex,
const Optional<NodeId> & aPeerNodeId)
{
// This is assuming that ReadClient::Close will not affect any other
// ReadClients in the list.
for (auto * readClient = mpActiveReadClientList; readClient != nullptr;)
{
// Grab the next client now, because we might be about to delete readClient.
auto * nextClient = readClient->GetNextClient();
if (readClient->IsSubscriptionType())
{
bool fabricMatches = !aFabricIndex.HasValue() || (aFabricIndex.Value() == readClient->GetFabricIndex());
bool nodeIdMatches = !aPeerNodeId.HasValue() || (aPeerNodeId.Value() == readClient->GetPeerNodeId());
if (fabricMatches && nodeIdMatches)
{
readClient->Close(CHIP_NO_ERROR);
}
}
readClient = nextClient;
}
}
#endif // CHIP_CONFIG_ENABLE_READ_CLIENT
bool InteractionModelEngine::SubjectHasActiveSubscription(FabricIndex aFabricIndex, NodeId subjectID)
{
bool isActive = false;
mReadHandlers.ForEachActiveObject([aFabricIndex, subjectID, &isActive](ReadHandler * handler) {
VerifyOrReturnValue(handler->IsType(ReadHandler::InteractionType::Subscribe), Loop::Continue);
Access::SubjectDescriptor subject = handler->GetSubjectDescriptor();
VerifyOrReturnValue(subject.fabricIndex == aFabricIndex, Loop::Continue);
if (subject.authMode == Access::AuthMode::kCase)
{
if (subject.cats.CheckSubjectAgainstCATs(subjectID) || subjectID == subject.subject)
{
isActive = handler->IsActiveSubscription();
// Exit loop only if isActive is set to true.
// Otherwise keep looking for another subscription that could match the subject.
VerifyOrReturnValue(!isActive, Loop::Break);
}
}
return Loop::Continue;
});
return isActive;
}
bool InteractionModelEngine::SubjectHasPersistedSubscription(FabricIndex aFabricIndex, NodeId subjectID)
{
bool persistedSubMatches = false;
#if CHIP_CONFIG_PERSIST_SUBSCRIPTIONS
auto * iterator = mpSubscriptionResumptionStorage->IterateSubscriptions();
// Verify that we were able to allocate an iterator. If not, we are probably currently trying to resubscribe to our persisted
// subscriptions. As such, we assume we have a persisted subscription and return true.
// If we don't have a persisted subscription for the given fabric index and subjectID, we will send a Check-In message next time
// we transition to ActiveMode.
VerifyOrReturnValue(iterator, true);
SubscriptionResumptionStorage::SubscriptionInfo subscriptionInfo;
while (iterator->Next(subscriptionInfo))
{
// TODO(#31873): Persistent subscription only stores the NodeID for now. We cannot check if the CAT matches
if (subscriptionInfo.mFabricIndex == aFabricIndex && subscriptionInfo.mNodeId == subjectID)
{
persistedSubMatches = true;
break;
}
}
iterator->Release();
#endif // CHIP_CONFIG_PERSIST_SUBSCRIPTIONS
return persistedSubMatches;
}
bool InteractionModelEngine::FabricHasAtLeastOneActiveSubscription(FabricIndex aFabricIndex)
{
bool hasActiveSubscription = false;
mReadHandlers.ForEachActiveObject([aFabricIndex, &hasActiveSubscription](ReadHandler * handler) {
VerifyOrReturnValue(handler->IsType(ReadHandler::InteractionType::Subscribe), Loop::Continue);
Access::SubjectDescriptor subject = handler->GetSubjectDescriptor();
VerifyOrReturnValue(subject.fabricIndex == aFabricIndex, Loop::Continue);
if ((subject.authMode == Access::AuthMode::kCase) && handler->IsActiveSubscription())
{
// On first subscription found for fabric, we can immediately stop checking.
hasActiveSubscription = true;
return Loop::Break;
}
return Loop::Continue;
});
return hasActiveSubscription;
}
void InteractionModelEngine::OnDone(CommandResponseSender & apResponderObj)
{
mCommandResponderObjs.ReleaseObject(&apResponderObj);
}
// TODO(#30453): Follow up refactor. Remove need for InteractionModelEngine::OnDone(CommandHandlerImpl).
void InteractionModelEngine::OnDone(CommandHandlerImpl & apCommandObj)
{
// We are no longer expecting to receive this callback. With the introduction of CommandResponseSender, it is now
// responsible for receiving this callback.
VerifyOrDie(false);
}
void InteractionModelEngine::OnDone(ReadHandler & apReadObj)
{
//
// Deleting an item can shift down the contents of the underlying pool storage,
// rendering any tracker using positional indexes invalid. Let's reset it,
// based on which readHandler we are getting rid of.
//
mReportingEngine.ResetReadHandlerTracker(&apReadObj);
mReadHandlers.ReleaseObject(&apReadObj);
TryToResumeSubscriptions();
}
void InteractionModelEngine::TryToResumeSubscriptions()
{
#if CHIP_CONFIG_PERSIST_SUBSCRIPTIONS && CHIP_CONFIG_SUBSCRIPTION_TIMEOUT_RESUMPTION
if (!mSubscriptionResumptionScheduled && HasSubscriptionsToResume())
{
mSubscriptionResumptionScheduled = true;
auto timeTillNextSubscriptionResumptionSecs = ComputeTimeSecondsTillNextSubscriptionResumption();
mpExchangeMgr->GetSessionManager()->SystemLayer()->StartTimer(
System::Clock::Seconds32(timeTillNextSubscriptionResumptionSecs), ResumeSubscriptionsTimerCallback, this);
mNumSubscriptionResumptionRetries++;
ChipLogProgress(InteractionModel, "Schedule subscription resumption when failing to establish session, Retries: %" PRIu32,
mNumSubscriptionResumptionRetries);
}
#endif // CHIP_CONFIG_PERSIST_SUBSCRIPTIONS && CHIP_CONFIG_SUBSCRIPTION_TIMEOUT_RESUMPTION
}
Status InteractionModelEngine::OnInvokeCommandRequest(Messaging::ExchangeContext * apExchangeContext,
const PayloadHeader & aPayloadHeader, System::PacketBufferHandle && aPayload,
bool aIsTimedInvoke)
{
// TODO(#30453): Refactor CommandResponseSender's constructor to accept an exchange context parameter.
CommandResponseSender * commandResponder = mCommandResponderObjs.CreateObject(this, this);
if (commandResponder == nullptr)
{
ChipLogProgress(InteractionModel, "no resource for Invoke interaction");
return Status::Busy;
}
CHIP_FAULT_INJECT(FaultInjection::kFault_IMInvoke_SeparateResponses,
commandResponder->TestOnlyInvokeCommandRequestWithFaultsInjected(
apExchangeContext, std::move(aPayload), aIsTimedInvoke,
CommandHandlerImpl::NlFaultInjectionType::SeparateResponseMessages);
return Status::Success;);
CHIP_FAULT_INJECT(FaultInjection::kFault_IMInvoke_SeparateResponsesInvertResponseOrder,
commandResponder->TestOnlyInvokeCommandRequestWithFaultsInjected(
apExchangeContext, std::move(aPayload), aIsTimedInvoke,
CommandHandlerImpl::NlFaultInjectionType::SeparateResponseMessagesAndInvertedResponseOrder);
return Status::Success;);
CHIP_FAULT_INJECT(
FaultInjection::kFault_IMInvoke_SkipSecondResponse,
commandResponder->TestOnlyInvokeCommandRequestWithFaultsInjected(
apExchangeContext, std::move(aPayload), aIsTimedInvoke, CommandHandlerImpl::NlFaultInjectionType::SkipSecondResponse);
return Status::Success;);
commandResponder->OnInvokeCommandRequest(apExchangeContext, std::move(aPayload), aIsTimedInvoke);
return Status::Success;
}
CHIP_ERROR InteractionModelEngine::ParseAttributePaths(const Access::SubjectDescriptor & aSubjectDescriptor,
AttributePathIBs::Parser & aAttributePathListParser,
bool & aHasValidAttributePath, size_t & aRequestedAttributePathCount)
{
TLV::TLVReader pathReader;
aAttributePathListParser.GetReader(&pathReader);
CHIP_ERROR err = CHIP_NO_ERROR;
aHasValidAttributePath = false;
aRequestedAttributePathCount = 0;
while (CHIP_NO_ERROR == (err = pathReader.Next(TLV::AnonymousTag())))
{
AttributePathIB::Parser path;
//
// We create an iterator to point to a single item object list that tracks the path we just parsed.
// This avoids the 'parse all paths' approach that is employed in ReadHandler since we want to
// avoid allocating out of the path store during this minimal initial processing stage.
//
SingleLinkedListNode<AttributePathParams> paramsList;
ReturnErrorOnFailure(path.Init(pathReader));
ReturnErrorOnFailure(path.ParsePath(paramsList.mValue));
if (paramsList.mValue.IsWildcardPath())
{
auto state = AttributePathExpandIterator::Position::StartIterating(¶msList);
AttributePathExpandIterator pathIterator(GetDataModelProvider(), state);
ConcreteAttributePath readPath;
// The definition of "valid path" is "path exists and ACL allows access". The "path exists" part is handled by
// AttributePathExpandIterator. So we just need to check the ACL bits.
while (pathIterator.Next(readPath))
{
// leave requestPath.entityId optional value unset to indicate wildcard
Access::RequestPath requestPath{ .cluster = readPath.mClusterId,
.endpoint = readPath.mEndpointId,
.requestType = Access::RequestType::kAttributeReadRequest };
err = Access::GetAccessControl().Check(aSubjectDescriptor, requestPath,
RequiredPrivilege::ForReadAttribute(readPath));
if (err == CHIP_NO_ERROR)
{
aHasValidAttributePath = true;
break;
}
}
}
else
{
ConcreteAttributePath concretePath(paramsList.mValue.mEndpointId, paramsList.mValue.mClusterId,
paramsList.mValue.mAttributeId);
if (IsExistentAttributePath(concretePath))
{
Access::RequestPath requestPath{ .cluster = concretePath.mClusterId,
.endpoint = concretePath.mEndpointId,
.requestType = Access::RequestType::kAttributeReadRequest,
.entityId = paramsList.mValue.mAttributeId };
err = Access::GetAccessControl().Check(aSubjectDescriptor, requestPath,
RequiredPrivilege::ForReadAttribute(concretePath));
if (err == CHIP_NO_ERROR)
{
aHasValidAttributePath = true;
}
}
}
aRequestedAttributePathCount++;
}
if (err == CHIP_ERROR_END_OF_TLV)
{
err = CHIP_NO_ERROR;
}
return err;
}
CHIP_ERROR InteractionModelEngine::ParseEventPaths(const Access::SubjectDescriptor & aSubjectDescriptor,
EventPathIBs::Parser & aEventPathListParser, bool & aHasValidEventPath,
size_t & aRequestedEventPathCount)
{
TLV::TLVReader pathReader;
aEventPathListParser.GetReader(&pathReader);
CHIP_ERROR err = CHIP_NO_ERROR;
aHasValidEventPath = false;
aRequestedEventPathCount = 0;
while (CHIP_NO_ERROR == (err = pathReader.Next(TLV::AnonymousTag())))
{
EventPathIB::Parser path;
ReturnErrorOnFailure(path.Init(pathReader));
EventPathParams eventPath;
ReturnErrorOnFailure(path.ParsePath(eventPath));
++aRequestedEventPathCount;
if (aHasValidEventPath)
{
// Can skip all the rest of the checking.
continue;
}
// The definition of "valid path" is "path exists and ACL allows
// access". We need to do some expansion of wildcards to handle that.
aHasValidEventPath = MayHaveAccessibleEventPath(mDataModelProvider, eventPath, aSubjectDescriptor);
}
if (err == CHIP_ERROR_END_OF_TLV)
{
err = CHIP_NO_ERROR;
}
return err;
}
Protocols::InteractionModel::Status InteractionModelEngine::OnReadInitialRequest(Messaging::ExchangeContext * apExchangeContext,
const PayloadHeader & aPayloadHeader,
System::PacketBufferHandle && aPayload,
ReadHandler::InteractionType aInteractionType)
{
ChipLogDetail(InteractionModel, "Received %s request",
aInteractionType == ReadHandler::InteractionType::Subscribe ? "Subscribe" : "Read");
//
// Let's first figure out if the client has sent us a subscribe request and requested we keep any existing
// subscriptions from that source.
//
if (aInteractionType == ReadHandler::InteractionType::Subscribe)
{
System::PacketBufferTLVReader reader;
bool keepExistingSubscriptions = true;
if (apExchangeContext->GetSessionHandle()->GetFabricIndex() == kUndefinedFabricIndex)
{
// Subscriptions must be associated to a fabric.
return Status::UnsupportedAccess;
}
reader.Init(aPayload.Retain());
SubscribeRequestMessage::Parser subscribeRequestParser;
VerifyOrReturnError(subscribeRequestParser.Init(reader) == CHIP_NO_ERROR, Status::InvalidAction);
#if CHIP_CONFIG_IM_PRETTY_PRINT
subscribeRequestParser.PrettyPrint();
#endif
VerifyOrReturnError(subscribeRequestParser.GetKeepSubscriptions(&keepExistingSubscriptions) == CHIP_NO_ERROR,
Status::InvalidAction);
if (!keepExistingSubscriptions)
{
//
// Walk through all existing subscriptions and shut down those whose subscriber matches
// that which just came in.
//
mReadHandlers.ForEachActiveObject([apExchangeContext](ReadHandler * handler) {
if (handler->IsFromSubscriber(*apExchangeContext))
{
ChipLogProgress(InteractionModel,
"Deleting previous subscription from NodeId: " ChipLogFormatX64 ", FabricIndex: %u",
ChipLogValueX64(apExchangeContext->GetSessionHandle()->AsSecureSession()->GetPeerNodeId()),
apExchangeContext->GetSessionHandle()->GetFabricIndex());
handler->Close();
}
return Loop::Continue;
});
}
{
size_t requestedAttributePathCount = 0;
size_t requestedEventPathCount = 0;
AttributePathIBs::Parser attributePathListParser;
bool hasValidAttributePath = false;
bool mayHaveValidEventPath = false;
CHIP_ERROR err = subscribeRequestParser.GetAttributeRequests(&attributePathListParser);
if (err == CHIP_NO_ERROR)
{
auto subjectDescriptor = apExchangeContext->GetSessionHandle()->AsSecureSession()->GetSubjectDescriptor();
err = ParseAttributePaths(subjectDescriptor, attributePathListParser, hasValidAttributePath,
requestedAttributePathCount);
if (err != CHIP_NO_ERROR)
{
return Status::InvalidAction;
}
}
else if (err != CHIP_ERROR_END_OF_TLV)
{
return Status::InvalidAction;
}
EventPathIBs::Parser eventPathListParser;
err = subscribeRequestParser.GetEventRequests(&eventPathListParser);
if (err == CHIP_NO_ERROR)
{
auto subjectDescriptor = apExchangeContext->GetSessionHandle()->AsSecureSession()->GetSubjectDescriptor();
err = ParseEventPaths(subjectDescriptor, eventPathListParser, mayHaveValidEventPath, requestedEventPathCount);
if (err != CHIP_NO_ERROR)
{
return Status::InvalidAction;
}
}
else if (err != CHIP_ERROR_END_OF_TLV)
{
return Status::InvalidAction;
}
if (requestedAttributePathCount == 0 && requestedEventPathCount == 0)
{
ChipLogError(InteractionModel,
"Subscription from [%u:" ChipLogFormatX64 "] has no attribute or event paths. Rejecting request.",
apExchangeContext->GetSessionHandle()->GetFabricIndex(),
ChipLogValueX64(apExchangeContext->GetSessionHandle()->AsSecureSession()->GetPeerNodeId()));
return Status::InvalidAction;
}
if (!hasValidAttributePath && !mayHaveValidEventPath)
{
ChipLogError(InteractionModel,
"Subscription from [%u:" ChipLogFormatX64 "] has no access at all. Rejecting request.",
apExchangeContext->GetSessionHandle()->GetFabricIndex(),
ChipLogValueX64(apExchangeContext->GetSessionHandle()->AsSecureSession()->GetPeerNodeId()));
return Status::InvalidAction;
}
// The following cast is safe, since we can only hold a few tens of paths in one request.
if (!EnsureResourceForSubscription(apExchangeContext->GetSessionHandle()->GetFabricIndex(), requestedAttributePathCount,
requestedEventPathCount))
{
return Status::PathsExhausted;
}
}
}
else
{
System::PacketBufferTLVReader reader;
reader.Init(aPayload.Retain());
ReadRequestMessage::Parser readRequestParser;
VerifyOrReturnError(readRequestParser.Init(reader) == CHIP_NO_ERROR, Status::InvalidAction);
#if CHIP_CONFIG_IM_PRETTY_PRINT
readRequestParser.PrettyPrint();
#endif
{
size_t requestedAttributePathCount = 0;
size_t requestedEventPathCount = 0;
AttributePathIBs::Parser attributePathListParser;
CHIP_ERROR err = readRequestParser.GetAttributeRequests(&attributePathListParser);
if (err == CHIP_NO_ERROR)
{
TLV::TLVReader pathReader;
attributePathListParser.GetReader(&pathReader);
VerifyOrReturnError(TLV::Utilities::Count(pathReader, requestedAttributePathCount, false) == CHIP_NO_ERROR,
Status::InvalidAction);
}
else if (err != CHIP_ERROR_END_OF_TLV)
{
return Status::InvalidAction;
}
EventPathIBs::Parser eventpathListParser;
err = readRequestParser.GetEventRequests(&eventpathListParser);
if (err == CHIP_NO_ERROR)
{
TLV::TLVReader pathReader;
eventpathListParser.GetReader(&pathReader);
VerifyOrReturnError(TLV::Utilities::Count(pathReader, requestedEventPathCount, false) == CHIP_NO_ERROR,
Status::InvalidAction);
}
else if (err != CHIP_ERROR_END_OF_TLV)
{
return Status::InvalidAction;
}
// The following cast is safe, since we can only hold a few tens of paths in one request.
Status checkResult = EnsureResourceForRead(apExchangeContext->GetSessionHandle()->GetFabricIndex(),
requestedAttributePathCount, requestedEventPathCount);
if (checkResult != Status::Success)
{
return checkResult;
}
}
}
// We have already reserved enough resources for read requests, and have granted enough resources for current subscriptions, so
// we should be able to allocate resources requested by this request.
ReadHandler * handler = mReadHandlers.CreateObject(*this, apExchangeContext, aInteractionType, mReportScheduler);
if (handler == nullptr)
{
ChipLogProgress(InteractionModel, "no resource for %s interaction",
aInteractionType == ReadHandler::InteractionType::Subscribe ? "Subscribe" : "Read");
return Status::ResourceExhausted;
}
handler->OnInitialRequest(std::move(aPayload));
return Status::Success;
}
Protocols::InteractionModel::Status InteractionModelEngine::OnWriteRequest(Messaging::ExchangeContext * apExchangeContext,
const PayloadHeader & aPayloadHeader,
System::PacketBufferHandle && aPayload,
bool aIsTimedWrite)
{
ChipLogDetail(InteractionModel, "Received Write request");
for (auto & writeHandler : mWriteHandlers)
{
if (writeHandler.IsFree())
{
VerifyOrReturnError(writeHandler.Init(GetDataModelProvider(), this) == CHIP_NO_ERROR, Status::Busy);
return writeHandler.OnWriteRequest(apExchangeContext, std::move(aPayload), aIsTimedWrite);
}
}
ChipLogProgress(InteractionModel, "no resource for write interaction");
return Status::Busy;
}
CHIP_ERROR InteractionModelEngine::OnTimedRequest(Messaging::ExchangeContext * apExchangeContext,
const PayloadHeader & aPayloadHeader, System::PacketBufferHandle && aPayload,
Protocols::InteractionModel::Status & aStatus)
{
TimedHandler * handler = mTimedHandlers.CreateObject(this);
if (handler == nullptr)
{
ChipLogProgress(InteractionModel, "no resource for Timed interaction");
aStatus = Status::Busy;
return CHIP_ERROR_NO_MEMORY;
}
// The timed handler takes over handling of this exchange and will do its
// own status reporting as needed.
aStatus = Status::Success;
apExchangeContext->SetDelegate(handler);
return handler->OnMessageReceived(apExchangeContext, aPayloadHeader, std::move(aPayload));
}
#if CHIP_CONFIG_ENABLE_READ_CLIENT
Status InteractionModelEngine::OnUnsolicitedReportData(Messaging::ExchangeContext * apExchangeContext,
const PayloadHeader & aPayloadHeader, System::PacketBufferHandle && aPayload)
{
System::PacketBufferTLVReader reader;
reader.Init(aPayload.Retain());
ReportDataMessage::Parser report;
VerifyOrReturnError(report.Init(reader) == CHIP_NO_ERROR, Status::InvalidAction);
#if CHIP_CONFIG_IM_PRETTY_PRINT
report.PrettyPrint();
#endif
SubscriptionId subscriptionId = 0;
VerifyOrReturnError(report.GetSubscriptionId(&subscriptionId) == CHIP_NO_ERROR, Status::InvalidAction);
VerifyOrReturnError(report.ExitContainer() == CHIP_NO_ERROR, Status::InvalidAction);
ReadClient * foundSubscription = nullptr;
for (auto * readClient = mpActiveReadClientList; readClient != nullptr; readClient = readClient->GetNextClient())
{
auto peer = apExchangeContext->GetSessionHandle()->GetPeer();
if (readClient->GetFabricIndex() != peer.GetFabricIndex() || readClient->GetPeerNodeId() != peer.GetNodeId())
{
continue;
}
// Notify Subscriptions about incoming communication from node
readClient->OnUnsolicitedMessageFromPublisher();
if (!readClient->IsSubscriptionActive())
{
continue;
}
if (!readClient->IsMatchingSubscriptionId(subscriptionId))
{
continue;
}
if (!foundSubscription)
{
foundSubscription = readClient;
}
}
if (foundSubscription)
{
foundSubscription->OnUnsolicitedReportData(apExchangeContext, std::move(aPayload));
return Status::Success;
}
ChipLogDetail(InteractionModel, "Received report with invalid subscriptionId %" PRIu32, subscriptionId);
return Status::InvalidSubscription;
}
#endif // CHIP_CONFIG_ENABLE_READ_CLIENT
CHIP_ERROR InteractionModelEngine::OnUnsolicitedMessageReceived(const PayloadHeader & payloadHeader,
ExchangeDelegate *& newDelegate)
{
// TODO: Implement OnUnsolicitedMessageReceived, let messaging layer dispatch message to ReadHandler/ReadClient/TimedHandler
// directly.
newDelegate = this;
return CHIP_NO_ERROR;
}
CHIP_ERROR InteractionModelEngine::OnMessageReceived(Messaging::ExchangeContext * apExchangeContext,
const PayloadHeader & aPayloadHeader, System::PacketBufferHandle && aPayload)
{
using namespace Protocols::InteractionModel;
Protocols::InteractionModel::Status status = Status::Failure;
// Ensure that DataModel::Provider has access to the exchange the message was received on.
CurrentExchangeValueScope scopedExchangeContext(*this, apExchangeContext);
// Group Message can only be an InvokeCommandRequest or WriteRequest
if (apExchangeContext->IsGroupExchangeContext() &&
!aPayloadHeader.HasMessageType(Protocols::InteractionModel::MsgType::InvokeCommandRequest) &&
!aPayloadHeader.HasMessageType(Protocols::InteractionModel::MsgType::WriteRequest))
{
ChipLogProgress(InteractionModel, "Msg type %d not supported for group message", aPayloadHeader.GetMessageType());
return CHIP_NO_ERROR;
}
if (aPayloadHeader.HasMessageType(Protocols::InteractionModel::MsgType::InvokeCommandRequest))
{
status = OnInvokeCommandRequest(apExchangeContext, aPayloadHeader, std::move(aPayload), /* aIsTimedInvoke = */ false);
}
else if (aPayloadHeader.HasMessageType(Protocols::InteractionModel::MsgType::ReadRequest))
{
status = OnReadInitialRequest(apExchangeContext, aPayloadHeader, std::move(aPayload), ReadHandler::InteractionType::Read);
}
else if (aPayloadHeader.HasMessageType(Protocols::InteractionModel::MsgType::WriteRequest))
{