33 Commits

Author	SHA1	Message	Date
romanett	28f1401324	Server: cut request-path lock contention and allocation; add load harness (#4707) ... Profiling the reference server under load showed most request-path CPU spent spinning on contended locks, plus several avoidable allocations per request or per node. This PR removes them, switches the reference server to Server GC, and adds the load harness used to measure it. ## Results Paired A/B against `master` (3 alternating rounds, medians, 20 sessions, workstation GC on both sides, 24-core machine): | Scenario | Throughput | p50 | p90 | Server CPU / op | Server alloc / op | Lock contention | |---|---|---|---|---|---|---| | Read, 1 value | **+45%** (94k → 137k req/s) | −20% | −46% | −37% | −39% | −94% | | Read, 100 values | **+40%** | −26% | −17% | −24% | −25% | +130% ¹ | | Read, 100 values, SignAndEncrypt | **+48%** | −36% | −20% | −30% | −26% | +106% ¹ | | Browse (Server object) | **+33%** | −31% | −12% | −13% | −14% | −40% | | Write, 100 values | +13% | −12% | −4% | −10% | −19% | −23% | | Data-change subscriptions | ±0 ² | ≈ | ≈ | −14% | −17% | −29% | ¹ The faster server spends more time in the remaining per-node locks. ² Throughput is bounded by the writer rate in this scenario. Separately, Server GC instead of workstation GC doubles Read-100 throughput (21k → 44k req/s) and cuts p90 from 2.1 ms to 0.6 ms, because workstation GC paused the server for about half the wall time under load. The working set grows from ~210 MB to ~430 MB. ## Changes - **`ObjectPool<T>`**: lock-free slot array. `ConcurrentBag.Count` took every per-thread lock on each `Return` of the pooled response value-task source, once per request. - **`FairRequestQueue`**: - drops redundant gate entries: the fail-fast pre-checks and the stopped check read volatile fields and are re-checked under the gate; the owner count is folded into selection; - coalesces wake pulses with a pending flag, so the bounded signal channel's lock is only taken when no token is outstanding. Wake-count semantics in the tests are unchanged. - **`DefaultServerResourceIsolationProvider`**: - compares peer addresses without `GetAddressBytes()` allocations; - builds the unsecured verification context only when a classifier is configured. - **TCP listener / channel**: caches the certificate DER copies per channel, keyed on the certificate instance. `X509Certificate2.RawData` returns a fresh copy on every access, and the listener read it for every request. - **`EndpointBase`**: resolves the request `ActivitySource` once instead of `Assembly.GetCallingAssembly()` per request. - **Node managers**: - one `ServerSystemContext` copy per request (cached on the `OperationContext`) for per-node callbacks: permission metadata, node metadata, view membership, method lookup; - removes a discarded copy in `GetReferenceDescriptionAsync`; - per-request operation caches are plain `Dictionary` instead of a `ConcurrentDictionary` with 24 lock objects; - the validation cache is built in one pass; - fixes zero-capacity error lists. - **`ResourceManager`**: translation lookups read an immutable snapshot that is rebuilt after writes. Browse serialised on the global lock for every display name. - **`MonitoredItem`**: shares the default `DataChangeFilter` instead of allocating one per sampled value. - **Reference server**: `ServerGarbageCollection=true`; new "Garbage collector mode" section in `docs/ServerScalability.md`. - **`perf/`**: `ServerLoadHarness` (out-of-process server plus load driver, server-side CPU/GC/alloc/contention deltas, optional `dotnet-trace` capture), `TraceAnalyzer` (TraceEvent-based CPU/allocation/contention aggregation), and paired A/B scripts. Not part of `UA.slnx`. ### Behaviour notes for custom node managers - The `IDictionary<NodeId, NodeState>` operation cache handed to overrides is now a `Dictionary`. It was a `ConcurrentDictionary`, but only one request flow uses it. - Within one request, per-node callbacks of a node manager share one `ServerSystemContext` copy. ### Later commits on this PR - **Permission checks without `NodeMetadata`** (`9068684c3`): the role-permission and access-restriction validators run on an internal `PermissionMetadata` struct; `AsyncCustomNodeManager` fills it on the stack from the same attributes and namespace defaults. Browse's reference filter reads 3 attributes per target instead of 13. Read 100 values: 120.6 → 95.7 KB/request, ~21k → 26k req/s; Browse 67.6 → 51.8 KB, 26.7k → 29.8k req/s. - **Read-only channel evidence** (`936b28d76`, `dc638ab9f`): `SecureChannelContext.ClientChannelCertificate`, `ServerChannelCertificate` and `ChannelThumbprint` are `ByteString`, so the cached per-channel certificate buffer is shared without a copy and cannot be altered by handlers or classifiers. **Public API change**, see the new section in `docs/MigrationGuide.md`. The isolation provider's revalidation snapshot still copies. - **Session lookup** (`936b28d76`): `SessionManager.TryGetSessionContext` takes the candidate snapshot without the bindings lock; the validating check under the lock is unchanged (2 instead of 4 global lock acquisitions per request). - Unit tests for `ObjectPool`, the per-request system context cache, the translation snapshot, `SecureChannelContext` null semantics and a stopped `FairRequestQueue`; `perf/` follows the repository conventions. ## Testing - `Opc.Ua.Server.Tests` (net10.0): 8386 passed before the `ByteString` change. After it, 13 secure-session and isolation tests failed; both causes are fixed in `dc638ab9f` and those tests (25 with their variants) pass. A full rerun of the Server, Sessions, Core, Redundancy, LDS and GDS suites on the final commit is in progress. - Full solution builds for net10.0 and net48; `dotnet format whitespace` clean. ### o6-automation opcua-benchmarks (sampling, deep pipelines) Replicated both tests of the [o6-automation benchmark](https://github.com/o6-automation/opcua-benchmarks) in the harness (`--scenario counters`, and `read` with 10 clients × N outstanding), paired against `origin/master`: | Test | master | this PR | |---|---|---| | Subscription sampling, 100 Hz, every item ≥ 99 % of samples, 1 item | FAIL (75–94 %) | PASS (100 %) | | same, 1024 items | FAIL (64–73 %) | PASS (99.9 %) | | same, capacity | — | between 4096 and 6144 items (~410–520k samples/s) | | Read, 10 clients × 100 outstanding, None | stalls (0–1.7k req/s) | 121–131k req/s | | Read, 10 clients × 100 outstanding, SignAndEncrypt | stalls (0 req/s) | 89–91k req/s | | Read, 10 clients × 1000 outstanding | channels faulted (`BadTcpNotEnoughResources`) | 0 errors, ~45–54k req/s | - **Fixed-rate sampling** (`30b769d13`): the sampling loop waited one interval after each sample, adding timer overshoot and sampling time to every cycle; samples now have absolute deadlines. - **Async response send** (`cdac5c5ca`): `SendResponse` blocked thread-pool workers on the channel gate; with many requests in flight the receive loop that was handed the gate waited for a pool thread and the channel stalled. The TCP, Kestrel TCP and WebSocket listeners now use `SendResponseAsync`. - **Backpressure instead of channel fault** (`191cd2ba7`): server channels stop reading while more than 100 responses are queued and resume at 50, instead of faulting the channel. Client channels keep reading. At 10,000 outstanding requests throughput is ~50k req/s with or without the limit engaged, so the remaining gap to the 100-per-client case is not the backpressure. ## Not changed - `SentMessageQueue` deep-clones every `NotificationMessage`. Retained messages return their pooled payloads on acknowledgement while the response copy may still be queued for send, and a client can acknowledge a sequence number before receiving it; the clone keeps a recycled payload from reaching another session's response. Removing it needs a send-completion hook from the transport. - Generated responses allocate a default `ResponseHeader` that is replaced (~2-3 % of per-request allocation). Fixing it means making structure fields of every generated type lazily initialized, a generator-wide change to default values, equality and encoding. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-09 13:00:49 +02:00
romanett	9b034f8291	Enable nullable reference types centrally; migrate all unset and annotations-only projects (#4700) ... # Description Nullable reference types are now enabled once, in `common.props`, and every project in the repository builds warning-clean with them. **Configuration** - `<Nullable>enable</Nullable>` lives in `common.props`. All per-project `<Nullable>` settings are removed: 178 project files (enable, annotations, and the `disable` in the three Aot test projects). - 419 per-file `#nullable enable`/`restore` directives and the 4 `#nullable disable` directives are removed. - Kept on purpose: - The 5 `<auto-generated>` schema files (`UANodeSet.cs`, `UA Type Dictionary.cs`, `OPCBinarySchema.cs`, `SecuredApplication.cs`, `PInvokeHelper.cs`) keep `#nullable enable`. The compiler ignores the project setting in generated code, so the directive is required there. - `tests/Opc.Ua.Interop.LegacyPeer` keeps `disable`. It builds against the 1.5.378 packages and does not import the repository props. - `docs/DeveloperGuide.md` and `.github/copilot-instructions.md` now describe the central setting. **Migration** (the 43 unset and 13 annotations-only projects, roughly 10k diagnostics) - **Production code: annotated at the declarations.** Covers `tools/Opc.Ua.SourceGeneration.Core`, `src/Opc.Ua.Lds.Server` and the LDS sample. - Members, parameters and returns are nullable where null actually flows. - Null-check helpers carry `[NotNullWhen]` (`IsNull`, `IsValidXmlName`, `IsMethodTypeDesign`). - `CoreUtils.Format`, `Utils.Format`, `ITemplateWriter.WriteLine` take `params object?[]`. `Template.AddReplacement` takes `string?` (rendering already skips null replacements). - `IRegisteredServerStore.RegisterAsync` returns `Task<RegistrationEntry?>`: it returns null when a registration is removed. - Dereferences backed by an invariant (for example, the validated model) use `!`, so runtime behaviour is unchanged. - **Behavioural changes in production code** (small, deliberate): - `NodeSetToModelDesign` throws `InvalidOperationException` when the file is not a NodeSet. Before, it threw a NullReferenceException on the next line. - `ModelDesignValidator` starts its lookup tables empty instead of null. A redundant `if (m_nodes == null) return;` guard is gone. - **Test code: minimal annotations.** - `?` on values that can be null, `!` where the test asserts non-null. - `= null!` for fixture members assigned in SetUp. - `TryGetStructure<T>(out T? x)` where the inferred `T?` broke the `IEncodeable` constraint. - A few redundant `== null` checks on structs (`NodeId`, `ArrayOf<T>`) folded into the adjacent `IsNull`/`Count` checks. **Notes for reviewers** - The diff is large (~1,500 files) but almost entirely mechanical: `?`, `!` and directive removal. The non-annotation changes are listed above. - Known follow-up, not done here: `IModelDesign.Namespaces/TargetNamespace/NamespaceUris` stay non-nullable even though the validator returns null before it loads a dictionary. Making them nullable would ripple through every generator call site. ## Related Issues - Fixes #4439 ## Checklist - [ ] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [ ] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [ ] I have addressed **all** PR feedback received. The "no new warnings" box covers net10.0 and net48: full non-incremental builds of `UA.slnx`, `tools/SourceGeneration.slnx`, `tools/MigrationAnalyzer.slnx` and the Aot test projects finished with 0 warnings and 0 errors under the repository's warnings-as-errors settings. net9.0 and net8.0 also had no nullable diagnostics, but they were not rebuilt after the final fixes. Tests have not been run locally yet. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-08 08:48:13 +02:00
romanett	7212607f16	OPC UA Part 3 compliance: permissions, Write semantics, NodeManagement, NodeSet DataTypes, locales (#4675) ... # Description Fixes the High and Medium findings of an OPC UA Part 3 (OPC 10000-3, Address Space Model) compliance audit. Each finding was checked against the full spec text (Parts 3, 4, 5, 6, 14 and 18) before it was fixed. Every fix comes with regression tests that fail without it. ### Role permissions (Part 3 §8.55, Part 4 §5.12.2.2) - The type-hierarchy exemption in `MasterNodeManager.ValidateRolePermissions` / `ValidateAccessRestrictions` now covers only Browse, Read and ReadRolePermissions. Type nodes stay visible to generic clients, which was the intent of #3705; every other permission bit is now enforced on them. - `ReceiveEvents` is enforced on the EventType node. The standard NodeSet grants it on `AuditEventType` and its subtypes only to SecurityAdmin, so only SecurityAdmin sessions now receive audit events. - Call checks the `Call` permission and AccessRestrictions on the Object as well as on the Method. - When a Call's `methodId` is the Method declaration of the ObjectType, the Object's Method with the same BrowseName is permission-checked and invoked. The declaration is used only if the Object has no such Method. This applies to `AsyncCustomNodeManager`, `CustomNodeManager2` and the sample node manager. ### Write service (Part 3 §5.6.2, §8.40, §8.57; Part 4 §5.11.4) - The synchronous `OnWriteValue` path (fluent `OnWrite`) checks DataType and ValueRank first (`Bad_TypeMismatch`). After an IndexRange write it merges the slice into the cached value instead of replacing it. - StatusWrite / TimestampWrite are enforced (`Bad_WriteNotSupported`). - Undefined enumeration values and invalid OptionSet writes return `Bad_OutOfRange`. OptionSet writes merge only the valid bits into the stored value. - New `ReportPropertyValueChanged` / `ReportSemanticChange` let server code raise SemanticChangeEvents for changes it makes itself. - Required follow-up (Part 14 §6.2.11.1): if an external target rejects a timestamp, the PubSub subscriber's TargetVariables writer retries without it. ### NodeManagement and Call arguments (Part 3 §5.5.2, §5.7.3, §6.4.2; Part 4 §5.8, §5.12.2) - AddNodes creates the Mandatory InstanceDeclarations of the TypeDefinition and rejects abstract or Interface types (`Bad_TypeDefinitionInvalid`). - AddReferences, DeleteReferences and DeleteNodes bump NodeVersion and raise GeneralModelChangeEvents. - Clients may omit trailing optional input arguments (`HasOptionalInputArgumentDescription`). ### NodeSet DataTypes (Part 3 §5.8.3, §8.48; Part 6 Annex F.12) - `UANodeSet.Import` completes structure definitions with the base type's fields (base fields first). It creates definitions for structures without fields and sets `DefaultEncodingId`. `StructureDefinition.FirstExplicitFieldIndex` marks the subtype's own fields. - `DataTypeState` no longer mutates the stored definition on read. ### Locales (Part 3 §5.2.5, §8.5; Part 4 §5.4) - Read, Browse and data change notifications return the translation that best matches the session's LocaleIds, or all translations for `mul`. The selection lives in the server dispatcher and is built on `ResourceManager`: the new `TranslateValue` calls the overridable `Translate`. - Locale ids are matched case-insensitively, and fallback translations carry their real locale. ### Client complex types (Part 6 §5.1.7) - The Reflection.Emit builder encodes only `IsOptional` subtyped fields as ExtensionObject. It also supports OptionSet subtypes: an unsupported type is skipped instead of aborting the whole load. - `TypeInfo.GetXmlName` uses the data type's XML name for dynamic structures and OptionSets (the XML body element was `<Structure>`). Both builders now produce identical XML. ## Behaviour changes All are documented in `docs/MigrationGuide.md`. - **Audit events:** only SecurityAdmin receives them. The CTT "Auditing Connections" unit needs a SecurityAdmin user (e.g. sysadmin); `AuditingOperationTests` was updated. - **Write timestamps and status:** clients writing a SourceTimestamp or a non-Good StatusCode get `Bad_WriteNotSupported` unless the Variable has StatusWrite/TimestampWrite. No variable in `src/` sets these bits. - **AddNodes:** it rejects abstract types (including `BaseVariableType` and `BaseEventType`), and new instances now come with child nodes. - **Call:** the Object needs the Call permission. The Object's own Method runs even when the call names the type declaration. ## Not included - Low-severity findings: missing validation on optional services and author-side NodeSet rules. - LocalizedText nested inside structures or Variant arrays, and in HistoryRead or Call outputs. ## Testing net10.0, Debug, one suite at a time on the merged branch. All suites below pass: | Suite | Passed | |---|---| | Types | 11430 | | Core.Encoders | 2947 | | Core.Schema | 179 | | Core.Security | 558 | | Client | 2761 | | Server | 8210 | | InformationModel | 1080 | | Features | 145 | | History | 536 | | Di | 455 | | Machinery | 167 | | Robotics | 661 | | Robotics.Intent | 22 | | Pumps | 75 | | Scales | 122 | | Positioning | 69 | | ISA95 | 144 | | Vision | 484 | | PubSub | 1490 | | PubSub.Adapter | 151 | | PubSub.Server | 177 | | Redundancy.Server | 856 | | Lds | 173 | | Configuration | 241 | | WotCon | 1496 | - **Client.ComplexTypes:** one test wrote a SourceTimestamp to a variable without TimestampWrite. It is fixed in this PR, and the suite has not been re-run since. - **Core:** 6068 passed, 1 failure in `ActivityTraceFlags_Metrics_ShouldRecordMetricsOnly`. That telemetry test passed when re-run alone, so it looks flaky. - **Still running:** Sessions, Subscriptions (Classic, Durable, standard) and Interop. Results will follow on this PR. - `UA.slnx` builds with 0 errors for net10.0 and net48, with no new analyzer warnings in changed files. ## Related Issues - Part 3 compliance audit (no tracking issue) ## Checklist - [x] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [ ] I have addressed **all** PR feedback received. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-05 12:43:59 +00:00
romanett	35c08874ca	Server view parameter status codes; client transfer fallback when GetMonitoredItems is unavailable (#4654) ... Two defects found by interop testing the 2.0 stack against foreign OPC UA stacks (node-opcua, Milo, asyncua, open62541, async-opcua, gopcua). ## 1. Server: view timestamp/version without a ViewId returned Bad_ViewIdUnknown A Browse with a `ViewDescription` whose `ViewId` is null but whose `Timestamp` (or `ViewVersion`) is set got `Bad_ViewIdUnknown` from the node managers. `ViewDescription.IsDefault` is false, so `ValidateViewDescription` looked up the null `ViewId` and failed with "unknown view". Spec (OPC 10000-4): - §7.44: a null `viewId` means the entire AddressSpace. Timestamp and viewVersion each select a version of the View, and "either the Timestamp or the viewVersion parameter may be set by a Client, but not both". - Table 178 / Browse service results (§5.9.2.3): `Bad_ViewTimestampInvalid` = "the view timestamp is not available or not supported", `Bad_ViewVersionInvalid` likewise, and `Bad_ViewParameterMismatch` = the view parameters are not consistent with each other. Fix: a new internal `ViewDescriptionValidator.ValidateParameters` handles the checks that don't depend on the View node: - timestamp **and** version set → `Bad_ViewParameterMismatch` (before this, a known view got `Bad_ViewTimestampInvalid`) - null ViewId + timestamp → `Bad_ViewTimestampInvalid` - null ViewId + version → `Bad_ViewVersionInvalid` It is called at service level in `NodeManagerServiceDispatcher.BrowseAsync`, because these are Browse *service* results. It is also called in `CustomNodeManager2.ValidateViewDescription`, `AsyncCustomNodeManager.ValidateViewDescription` and the `DiagnosticsNodeManager` override, so a node manager called directly answers the same way. TranslateBrowsePaths and RegisterNodes take no ViewDescription, and BrowseNext reuses the validated view from the continuation point. ## 2. Client: transfer failed when the optional Server.GetMonitoredItems is unavailable After `TransferSubscriptions` returns Good, the client calls `Server.GetMonitoredItems` (i=11492) to map server handles to client handles. That call is only made for a subscription that is not live in this client: one restored from saved state, or a clone. Its own live subscriptions skip it. `GetMonitoredItems` is an **Optional** method of ServerType (OPC 10000-5 §6.3.1, §9.1), and several stacks don't provide it: asyncua 2.0.1 answers `BadNothingToDo`, open62541 built without `UA_ENABLE_XML_ENCODING` answers `BadInternalError`, and others answer `BadMethodInvalid` or `BadNotSupported`. When the call failed, the whole transfer was reported as failed ("SubscriptionId N could not be moved") even though the server had moved the subscription. For non-"definitive" codes such as BadNothingToDo or BadInternalError, the transferred server subscription was also left behind as an orphan. ### Chosen fallback The status of a failed call is now classified (`GetMonitoredItemsFallback.IsTransientFailure`): - **Transient** (timeout, busy server, too many operations, lost connection, channel or session): behaviour is unchanged. The transfer fails and nothing is deleted, so it can be retried. - **Anything else** (method missing, not supported, BadNothingToDo, BadInternalError, unusable output): the server does not provide the method. Then: 1. **The client knows server ids for its items** (the usual case: restored state, or a reconnect of its own subscription). Use that mapping and the transfer succeeds. A transfer keeps item ids and client handles, which is why OPC 10000-4 §6.8 tells clients to store the SubscriptionId together with the MonitoredItem client and server handles. Items saved without an id were never created on the server, and the normal apply path creates them, as before. 2. **No server ids are known** (a clone of a live subscription, `CloneSubscriptions`). Notifications would still arrive, because clones copy the client handles. But the items could never be modified or deleted, and recreating them would duplicate them on the server, since stale items can't be deleted without their ids. So: - classic engine, when the caller just moved the subscription (`Session.TransferSubscriptionsAsync`): delete the transferred server subscription and **recreate it in place** with the same items and client handles. The transfer reports success, but notifications the server still had queued for the old subscription are lost. The subscription gets a new id. - classic `Subscription.TransferAsync` (also used to adopt the session's own subscriptions, so nothing was moved): fails as before, and nothing is deleted or created. - new engine (`MonitoredItemManager.TrySynchronizeHandlesAsync`): fails as before. Its callers (`SubscriptionManager`) already recreate the subscription in that case. Both engines now treat an unusable GetMonitoredItems answer (wrong output arguments) the same way as an unavailable method. The two existing `TryCompleteTransferAsyncShouldReturnFalseWhenResponseWrong{1,2}Async` tests were updated and renamed to match. The existing classic test that expected a "definitive" failure to delete the subscription now checks the fallback to the known ids instead. Warnings are logged when the fallback is used (`Subscription + 71..73`, `MonitoredItemManager + 6`). ## Tests - Server: `AsyncCustomNodeManagerTests.BrowseAsyncNullViewIdWithVersionParametersReturnsViewParameterErrorAsync` (sync and async node manager, timestamp, version, both) and `MasterNodeManagerDeterministicTests.BrowseAsyncNullViewIdWithVersionParametersThrowsViewParameterError` (service level). - Classic client (`ClassicSubscriptionCoverageTests`): fallback to known ids for every non-transient code, while transient codes still fail; a Bad method result (asyncua style); clone recreated in place (old subscription deleted, items created with the original client handles); clone adopted through `TransferAsync` is neither deleted nor recreated. - New engine (`SubscriptionTests`): known ids used for Bad / BadMethodInvalid / BadNotSupported / BadNothingToDo / BadInternalError; transient failure and unknown ids still fail. Run locally (net10.0, sequential): - Opc.Ua.Client.Tests: 2745 passed / 0 failed - Opc.Ua.Server.Tests: 8089 passed / 0 failed / 5 skipped - Opc.Ua.Subscriptions.Durable.Tests: 36 passed / 11 skipped - Opc.Ua.InformationModel.Tests (View/Browse filter): 289 passed / 4 skipped - Opc.Ua.Sessions.Tests (Transfer/Reconnect filter): 155 passed / 103 skipped - Opc.Ua.Subscriptions.Tests (Transfer/Durable filter): 15 passed / 1 skipped - net48 build of both test projects: clean The interop test that found (2), `ServerFeatureInteropTests.TransferSubscriptionToNewSessionAsync`, is in the uncommitted foreign-interop work and isn't on master yet. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> Co-authored-by: Marc Schier <marcschier@users.noreply.github.com>	2026-10-04 19:01:38 +00:00
romanett	efad0ddeff	Server subscriptions: fix spec defects in Subscription/MonitoredItem handling found by audit (#4629) ... # Description Fixes defects found in a spec-grounded audit of the server **Subscription / MonitoredItem** implementation (`src/Opc.Ua.Server/Subscription/**`, `NodeManager/MonitoredItem/**`, `EventManager`, monitored-item service dispatch and filter validation). Each behaviour change was checked against OPC 10000-4 (§5.13, §5.14, §7.21, §7.22), Part 5 (subscription diagnostics) and Part 9 (ConditionRefresh). Every fix has a regression test. The audit found 56 defects (1 Critical, 3 High, 20 Medium, 32 Low). A follow-up max-effort code review of the fix branch found 27 more issues, mostly introduced by the first round of fixes. All but one are fixed here. ### Most important fixes - **Critical — remote hang:** an `AggregateFilter` with `processingInterval = NaN` was not revised, and `AggregateCalculator` looped forever while holding the node-manager lock, so one CreateMonitoredItems request blocked the node manager. Non-finite, ≤0 and sub-tick intervals are now revised (Part 4 §5.13.2.1), and the calculator rejects them as a backstop. - **Monitored-item limits:** new `ServerConfiguration.MaxMonitoredItemCount` / `MaxMonitoredItemsPerSubscription`; Bad_TooManyMonitoredItems is returned when a limit is hit, and ServerCapabilities now report the limits. Both default to `0` (no limit), so existing behaviour is unchanged. - **Sampling groups:** a client could get one dedicated thread per distinct sampling interval above 1 h; intervals above the last rate group are now rounded, and the loop is async. An item could also end up in two sampling groups and keep being sampled after it was deleted. - **Subscription state machine** (Part 4 §5.14.1.2): - the lifetime counter resets while a Publish is queued and counts otherwise; - the lifetime and keep-alive stay within `MaxSubscriptionLifetime`; - LatePublishRequestCount is counted once per entry into LATE; - messages held while publishing is disabled are no longer sent, and are not offered by Transfer/Republish either; - ConditionRefresh returns Bad_RefreshInProgress for any refresh already queued or running on the subscription. - **Triggering** (Part 4 §5.13.1.6): - linked items are triggered by an item still draining a backlog, by the first value after re-enable, and by an item created Disabled; - links are persisted for durable subscriptions; - Disabled/Sampling items follow the publish rules in the shared pipeline, so custom `IMonitoredItem` implementations follow them too. - **Queues** (Part 4 §5.13.1.5, §7.21): - no duplicate value after a queue-size increase; - EventQueueOverflow events are placed where the events were lost, including on queue shrink; - the duplicate-event check scans the newest entries; - EventQueueOverflowCount and MonitoringQueueOverflowCount are maintained correctly; - changing select clauses rebuilds queued events in the new layout, and is safe on durable queues and on failure. - **Filters:** - per-clause EventFilterResult instead of rejecting the whole item (Part 4 §7.22.3); - corrected status codes: Bad_DeadbandFilterInvalid, Bad_MonitoredItemFilterInvalid, Bad_EventFilterInvalid, Bad_MonitoringModeInvalid, Bad_TimestampsToReturnInvalid; - aggregate filter in subscriptions: processing interval at least 2× the revised sampling interval, revised StartTime on the requested grid, ServerTimestamp = end of interval (Part 4 §7.22.4). - **Lifecycle and races:** - expired subscriptions are always cleaned up, even when the session closes during cleanup; - Create/Transfer racing CloseSession returns Bad_SessionClosed; - session diagnostics counts no longer drift; - a large but valid Publish TimeoutHint no longer fails the request; - a ready subscription is served by queued Publish requests instead of going Late; - restored persisted state is validated. - **Access:** a value change notification is checked against each subscriber's UserAccessLevel, not the writer's. - **Redundancy / durable store:** - the first-unsent sequence number is mirrored; - sequence numbers are no longer reused after a second failover; - triggering links are stored (definition format 6, written only when links exist, so older replicas can still read link-less subscriptions). ### Behaviour changes reviewers should know - With the default config, publishing intervals above `MaxSubscriptionLifetime / 3` (1,200,000 ms) are revised down, so lifetime ≥ 3×keep-alive fits the configured maximum. - The revised keep-alive is capped at a third of the max lifetime. - Idle subscriptions expire after exactly MaxLifetimeCount cycles without a queued Publish. - A partly invalid EventFilter select list is accepted with per-clause errors. The public `EventFilter.Validate` keeps Status Good if at least one clause is valid; callers that cannot return per-clause results must also check the new `EventFilter.Result.HasSelectClauseErrors`. There is a migration note in `docs/migrate/2.0.x/sessions-subscriptions.md`. - Aggregate processing intervals may be revised higher (≥ 2× sampling interval); aggregate ServerTimestamp is now the interval end. - Sampling intervals above 3,600,000 ms are rounded to multiples of 900,000 ms (default rate groups). ### Public API Additive only: - `ServerConfiguration.MaxMonitoredItemCount` and `MaxMonitoredItemsPerSubscription`; - `EventFilter.Result.HasSelectClauseErrors`; - `IStoredSubscriptionTriggering`, `ISubscriptionRetransmissionSendStateStore`, `SubscriptionRetransmissionState.FirstUnsentSequenceNumber` (optional store capabilities, detected with `as`); - new `EventQueueHandler` constructor overloads. ### Known open items (not in this PR) - **Part 4 §5.13.2.1:** CreateMonitoredItems should create an item even when the user lacks Read permission and report the error in Publish. This is not done: the create-time RolePermissions check is the only role check on the initial value, so following the spec would leak values until every node manager re-checks per sample. - **Sampling loop:** it runs on thread-pool threads; node managers with blocking synchronous reads should not use sampling groups heavily. The alternative, a dedicated thread per group, was the thread-exhaustion issue fixed here. - **Restarts:** a pending QueueSize-1 value and a pending overflow flag are not kept across a restart; that needs persistence interface extensions. - **Limit defaults:** decide whether the new limits should get finite defaults (currently 0 = unlimited). ## Related Issues - No tracking issue; the findings come from an internal audit of the server subscription code. ## Checklist - [ ] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [ ] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [ ] I have addressed **all** PR feedback received. ### Local verification (net10.0, all green) | Suite | Passed | Failed | |---|---|---| | Opc.Ua.Server.Tests | 7963 | 0 | | Opc.Ua.Subscriptions.Tests | 643 | 0 | | Opc.Ua.Subscriptions.Classic.Tests | 57 | 0 | | Opc.Ua.Subscriptions.Durable.Tests | 36 | 0 | | Opc.Ua.Redundancy.Server.Tests | 847 | 0 | | Opc.Ua.Core.Tests (filter tests) | 283 | 0 | net48 build of `Opc.Ua.Server.Tests`: 0 errors. net48 tests and the full UA.slnx were not run locally. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> Co-authored-by: Marc Schier <marcschier@users.noreply.github.com>	2026-10-03 05:43:16 +02:00
romanett	d98eb6b28c	Fix server session defects found by a spec-checked review of CreateSession, ActivateSession, session lifecycle and continuation points (#4632) ... # Description Fixes defects found by a spec-checked review of the server session implementation: CreateSession, ActivateSession, the session lifecycle (per-request validation, CloseSession, Cancel, timeout, shutdown) and session continuation points. Each finding was checked against OPC 10000-4 (§5.7, §7.9, §7.32), OPC 10000-5 (session diagnostics and audit events) and OPC 10000-6 §6.8.2. There is one commit per finding, and each commit message cites the spec section. A max-effort code review of the fixes then found 15 more issues, mostly regressions the first round introduced; they are fixed in the `revfix` merges. ## What changed **CreateSession** - At MaxSessionCount the oldest session that was never activated is closed to make room (§5.7.2.1). Sessions that are activated, already closing, or have an activation in flight are never evicted. The victim is claimed atomically, so a late activation commit on it is rejected. - `requestedSessionTimeout` NaN is revised. A malformed `endpointUrl` no longer fails the call with Bad_UnexpectedError. `serverUri` is ignored, as §5.7.2.2 requires. - Unnamed sessions get distinct names. - Session diagnostics now report `MaxResponseMessageSize` and `ServerUri`, and `SessionSecurityDiagnostics.Encoding` uses the specified names ("UA Binary", "XML", "JSON"). - AuditCreateSessionEvent carries SecureChannelId and the request certificate, also on failure. - Every rejected CreateSession is counted, and only once. A rejection during server startup no longer turns into Bad_UnexpectedError. - If an `OnApplicationCertificateError` override accepts an error, the certificate is now kept and the remaining checks still run. A certificate accepted this way does not grant TrustedApplication or application-based roles. **ActivateSession** - EphemeralKey handling follows OPC 10000-6 §6.8.2: - A key used to decrypt a UserName or IssuedToken secret is retired and replaced in the same commit. - A key that was not used is kept, and nothing is returned. - ECDHPolicyUri is honoured; an unsupported policy gets Bad_SecurityPolicyRejected. - Request parameters are no longer echoed back. - After the activation commits, a failure or cancellation no longer faults the response, which would hide the new server nonce. Post-commit callbacks run uncancellably. - An activation that overlaps a session close or timeout fails with Bad_SessionClosed instead of returning Good. - The PolicyId of an AnonymousIdentityToken is validated. - Status codes now follow §5.7.3.3: - Bad_ApplicationSignatureInvalid for a mismatched client-signature algorithm - Bad_UserSignatureInvalid for a mismatched X509 user-token signature algorithm - Bad_IdentityTokenInvalid for an undecodable token or an unknown policy - `ClientUserIdOfSession` keeps the user of the first activation. **Lifecycle and requests** - Requests on an expired or closing session are rejected with Bad_SessionClosed (§5.7.2.1). A CloseSession on an expired session that is not yet closing is still processed as the client's close and honours `deleteSubscriptions`. - Closing a session aborts its outstanding requests with Bad_SessionClosed. A request that registers after that abort pass is rejected too. - Cancel completes the matching requests with Bad_RequestCancelledByClient (§5.7.5.1). It also reaches requests still waiting in the request queue, but only when both timestamps prove the request was sent earlier. - There is one AuditCancelEvent per Cancel call, carrying the client's audit entry id and user. - Every close path goes through a single close claim, so SessionAbortCount, SessionTimeoutCount and the "Session/Terminated" and "Session/Timeout" audits are each counted once. - Teardown that started cannot be cancelled. Requests rejected by session validation are counted. **Continuation points** - HistoryRead returns Bad_NoContinuationPoints instead of evicting points of the same request (§7.9). Only the request that saved a point pins it, so points from prior requests can still be freed. - Points saved by a HistoryRead that faults are released. - Session-less Browse and BrowseNext no longer dereference a null session. ## Behaviour changes reviewers should know about - At the session cap, CreateSession evicts a non-activated session instead of returning Bad_TooManySessions. The eviction is counted in SessionAbortCount. - Clients see Bad_SessionClosed for requests on expired or closing sessions, and Bad_RequestCancelledByClient for cancelled requests. - `ActivateSessionProcessAdditionalParameters` is now called on every successful activation, with or without an AdditionalHeader. - If an `OnApplicationCertificateError` override returns instead of throwing, CreateSession now accepts the certificate. - Timeout and termination audits are now raised after the session teardown. - The only public API changes are additive overloads in `AuditEvents` and `RequestManager`. **Known partial fixes:** - The session's `maxResponseMessageSize` is reported but not enforced; only the channel limit applies. - With overlapping ActivateSession calls on one session, an earlier response can still carry a key that a later activation has already replaced. Closing that fully needs a new `ISession` member. ## Related Issues - The Redundancy.Server session-mirroring findings from the same review are tracked separately in #4627. ## Tests - Regression tests cover each finding. The new files are: - `CreateSessionSpecRegressionTests` - `ActivateSessionValidationRegressionTests` - `StandardServerActivateSessionRegressionTests` - `SessionLifecycleRegressionTests` - `SessionRequestAdmissionRegressionTests` - `HistoryReadContinuationDispatchTests` Existing test classes were extended too. - Local results on net10.0: - `Opc.Ua.Server.Tests`: 7883 passed / 0 failed / 5 skipped - `Opc.Ua.Sessions.Tests`: 790 passed / 0 failed / 379 skipped (same as master) - net48 Release build of `Opc.Ua.Server.Tests`: 0 errors / 0 warnings. ## Checklist - [x] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [ ] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [ ] I have addressed **all** PR feedback received. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-03 05:42:01 +02:00
romanett	20c2d77d57	Fix Core/Types audit findings and conform them to the OPC UA spec (stacked on #4569) (#4573) ... > **Stacked on #4569.** The base branch is `romanett/practical-murdock-fd9c56`, so this diff shows only the commits of this PR. Retarget to `master` after #4569 merges. ## Summary Bug audit of `Opc.Ua.Core`, `Opc.Ua.Core.Types`, `Opc.Ua.Types` and `Opc.Ua.Core.Schema`, with the findings fixed and the fixes grounded against the OPC UA specification (reference.opcfoundation.org). 133 commits in four groups: 1. **Audit fixes** (`Fix <ID>: ...`): 116 findings from a read-only audit, each with a regression test. IDs follow the audit scopes: T1-T6 `Opc.Ua.Types`, C1-C4 `Opc.Ua.Core`, S1 `Opc.Ua.Core.Types` + `Opc.Ua.Core.Schema`. 2. **Review fixes** (`Fix review <ID>: ...`): issues a code review of group 1 found, plus lower-severity leftovers. 3. **Spec fixes** (`Spec: #<n> ...`): the 18 places where an earlier fix only partly matched the spec text. 4. Test and analyzer follow-ups. Where `master` (#4516, #4522, #4540, #4564) or #4569 already fixed the same issue, their version was kept and this PR only adds what they didn't cover. ## Behaviour and user-facing changes ### Wire format and interoperability (breaking) - **PubSub AES-CTR (Aes128-CTR / Aes256-CTR)** now follows Part 14 Tables 156/157: - The counter block is `KeyNonce[4] | MessageNonce[8] | BlockCounter[4]`, and the block counter starts at 1. - The SecurityHeader nonce is 8 bytes: `Random[4] | UInt32 SequenceNumber`, with the sequence number starting at 1. - SKS key data is split with a 4-byte KeyNonce, giving 52 / 68 bytes. - **Not interoperable with earlier releases of this stack**, but matches the spec. There is a test against the independent RFC 3686 vector. - **User token signature** (Part 4 6.1.8): - The signed data is now built from the user token policy's SecurityPolicy on both client and server. - It also supports the SecurityMode None layout `ServerNonce | HASH(ServerCertificate) | ClientNonce`. - New overload `SecurityPolicyInfo.GetUserTokenSignatureData(..., MessageSecurityMode)`. - **Secure channel:** - The ECC AEAD `LastSequenceNumber` is correct across the 32-bit sequence wrap (Part 6 6.8.1). - The incoming chunk counts against MaxChunkCount/MaxMessageSize. - The sender no longer lets a message through that is 24 bytes over MaxMessageSize. - The OPN response signature is verified without overrunning the buffer (RSA_DH with differing key sizes). ### Sessions (server) - **CreateSession nonce:** - The client nonce is kept on None channels, because the None-mode user token signature covers it. - A nonce over 128 bytes returns `Bad_NonceInvalid` on every channel (Part 4 5.7.2.3). - The duplicate-nonce check runs only on secured channels. - A non-empty nonce under 32 bytes is still accepted on None, for compatibility. - **ActivateSession:** an embedded `EccEncryptedSecret` signing certificate is validated with the server's peer certificate validator (Part 6 6.8.3). Byte equality with the client certificate is only the fallback when no validator is available. New opt-in interface `ICertificateValidatorProvider`. - **FindServers / GetEndpoints:** `GatewayServerUri` and `DiscoveryProfileUri` are no longer swapped. ### Write, Read and Call (NodeState / node managers) - **UserWriteMask:** - Enforced for non-value attributes and for VariableType Value writes (`ValueForVariableType`), returning `Bad_UserAccessDenied`. - An unconfigured UserWriteMask (0, no handler) is not enforced, and reads back as the WriteMask so Read and Write agree (Part 3 8.60). - A throwing or Bad `OnReadUserWriteMask` handler fails only that item. - **Index-range writes:** - Slices are merged into the cached value under the attribute lock, also for `OnWriteValueAsync` handlers. - A data-change notification is still produced when the cache cannot absorb the slice. - The slice must match the unclipped range, otherwise `Bad_IndexRangeDataMismatch` (new status code in `Opc.Ua.Types`). - A range past the target returns `Bad_IndexRangeNoData`. - A handler without index-range support returns `Bad_WriteNotSupported` (Part 4 7.27, 5.11.4.4). - **Index-range reads on matrices** return partial results clipped to the source, instead of allocating the requested size (a Read with `"0:40000,0:40000"` no longer allocates about 1.6e9 elements). - **DataTypeDefinition writes:** - A value that isn't a decoded DataTypeDefinition, or whose kind doesn't match the DataType category, returns `Bad_TypeMismatch`. - Null is rejected for concrete Structure/Enumeration/OptionSet types. - WriteMask is checked first (Part 3 5.8.3). - **AnalogItem:** a null write skips the InstrumentRange check again. - **Method call:** the async fallback passes the ObjectId to the method handlers. - **Redundancy:** `DistributedValueParticipation` merges index-range writes and applies the index range on reads. - **Change masks:** `ClearChangeMasks` takes the bits atomically, so concurrent changes are no longer lost. - **`AccessLevelEx`:** preserved by Clone/Export. ### Alarms & Conditions (Part 9) - **Acknowledge / Confirm / AddComment:** - Accept any EventId the condition or its branches reported while that state is still pending (5.7.3). - An unknown id returns `Bad_EventIdUnknown`. - An already handled state returns `Bad_ConditionBranchAlreadyAcked` / `...AlreadyConfirmed`. - AddComment on a branch no longer changes the trunk, and the branch table is re-keyed when a branch's EventId changes. - **Shelving:** - OneShotShelve without MaxTimeShelved no longer overflows the timer. - A timed shelve is measured on the monotonic clock, so wall-clock steps don't delay the unshelve. - The state is named `OneShotShelved`. - **Audit events:** - They report failure for rejected method calls. - `SelectedResponse` is a UInt32. - A rejected negative Respond leaves SelectedResponse unset. - **`ContentFilterElement.Validate`:** an unknown FilterOperator is reported per element as `Bad_FilterOperatorInvalid`, instead of failing the whole service call. ### ContentFilter evaluation (Part 4 7.7.3, on top of #4564) - **Bitwise operators:** - The result takes the size of the larger operand. - Boolean, numeric String and one-element array operands are converted to integers implicitly. - Types without an implicit integer conversion give NULL. - **Strings:** ordering is ordinal, no longer culture dependent. - **Cast:** restricted to the Table 121 conversions, and QualifiedName to LocalizedText is added. The general `Variant.ConvertTo` keeps its wider set. - **Null and empty operands:** - `Like` with a NULL operand is NULL. - Empty arrays of the same DataType compare equal. - Null-string operands are NULL everywhere. ### Encoders and built-in types - **XML:** - Strings keep leading, trailing and whitespace-only content (Part 6 5.3.1.5). NodeSet import opts back into treating whitespace-only strings as empty with the new `XmlDecoder.TreatWhitespaceOnlyStringsAsEmpty`. - Layout whitespace around `<Identifier>` values is ignored, and trailing control characters are stripped from `s=` ids. - `XmlElement` ignores DTDs without expanding entities. - **JSON:** - A DateTime without an offset is read as UTC. - An unmappable `nsu=` NodeId and an unknown `svu=` ExpandedNodeId decode to a namespace-0 String NodeId (5.4.2.10 / 5.4.2.11). - `svr=` is rejected in a NodeId field. - Bad matrix dimensions return `BadDecodingError`. - The non-strict body stack stays balanced after an error. - The nesting limits match between encoder and decoder. - **Binary:** - `MaxByteStringLength` no longer applies to strings. - ExtensionObject bodies count toward the nesting limit on seekable streams (and in the XML encoder). - **Parsing:** - The NodeId parser requires `i=`/`s=`/`g=`/`b=`. - `ExpandedNodeId.Parse` rejects an empty `nsu=`/`svu=`. - NumericRange rejects a trailing `,` with `Bad_IndexRangeInvalid`. - RelativePath escapes `#`. - **Status codes:** `StatusCode.WithSubCode`/`WithCodeBits` keep the severity bits and look up the symbolic id for the new code. - **Variant / VariantHelper:** - `TryCastTo` returns false on a type mismatch. So `DataValue.GetValue<T>(default)` returns the default, and `GetValueOrDefault` / `CastTo` throw `BadTypeMismatch` as documented. - `System.DateTime` casts are supported. - Concrete encodeable arrays (e.g. `Argument[]`) no longer throw. - `ConvertTo` keeps one-element and empty arrays as arrays and checks the conversion is legal for empty arrays. - `CastFrom(object[])`, `CastFrom(Enum[])` and the obsolete `Variant(object)` constructors keep the array shape (previously a one-element array collapsed to a scalar and an empty one to Null). - `TypeInfo.Unknown` / `Variant.Null.TypeInfo` report `ValueRanks.Any`. - **Equality and hashing contracts fixed:** - Types: Matrix/MatrixOf, typed-null Variants, NodeId (the namespace index is now hashed), ExpandedNodeId, LocalizedText, DiagnosticInfo, StructureDefinition/EnumDefinition, CertificateIdentifier, UserIdentity and DateTimeUtc. - `MatrixOf.Dimensions` returns a copy. - Decimal equality and hashing now run in bounded time. - **Localized text:** a LocalizedText with locale `"mul"` and no usable translations, or null client locale ids, no longer throw. ### NodeSet, address space and utilities - **NodeSet export/import:** - Server index 0 is the local server on import and export, so local ids are no longer written as `svr=65535`. - `StructureDefinition.BaseDataType` is filled from the supertype on import. - **`NodeTable.Import`:** replaces duplicates, keeping the references neighbouring nodes hold. `TypeTable.Add` detaches a re-parented type from its old supertype, and `Node.Clone` gets its own ReferenceTable. - **`StringTable` / `NamespaceTable`:** capped at UInt16 indexes (`BadEncodingLimitsExceeded`) for Append and Update, instead of silently wrapping. - **Small fixes:** - `UnsecureRandom.Shared` is seeded randomly. - The peer's RetryAfterMs is clamped to one day. - The `CancelAsync` and `string.GetHashCode(StringComparison)` polyfills match BCL behaviour. - `CoreUtils.IsEqual` compares strings ordinally. ### Schema generation and ComplexTypeSystem - **JSON schema:** describes the 1.05 layout with the compact/verbose null rules, and now validates real `JsonEncoder` output. - **XSD:** - `EncodingMask` (`xs:unsignedLong`) only for StructureWithOptionalFields. - Guid and StatusCode are complex types. - Standard types are in the `Types.xsd` namespace. - **Structure-backed OptionSets** are described as `{Value, ValidBits}`. New `UaTypeDescription.IsStructureOptionSet` property and constructor overload. - **ComplexTypeSystem:** - A malformed type in a server dictionary is skipped per type instead of discarding the whole dictionary. - Cyclic supertype walks are bounded. - Declared definitions are no longer changed. - A dictionary validator is kept only if the dictionary parsed. ### Certificates and trust lists (Part 4 6.1.3, Part 12) - **Revocation:** - Checked for issuers supplied in the peer's chain and for inline-trusted issuers, against the CRLs in the trusted and issuer stores. - A store without CRL support no longer hides "revocation unknown". - `RejectUnknownRevocationStatus` is honoured for inline-trusted issuers unless the entry sets `SuppressRevocationStatusUnknown`. This changes the strict case of `ExplicitIssuerChainIsHonoredWithoutStorePathAsync`. - **Basic constraints / path length** violations fail with `Bad_CertificateInvalid`. - **`TreatAsInvalid`:** - Now yields `Bad_CertificateUntrusted`, which can't be suppressed or auto-accepted. - It is honoured on individual trust-list entries even when the certificate is also in a store. - **`EccEncryptedSecret`:** enforces the result of validating the sender certificate. - **`TrustListTransaction`:** - Routes each CRL to the store holding its issuer (TrustedCrls/IssuerCrls). - Validates staged CRLs, including the store's CRL support, before changing anything. - Applies certificates before CRLs. - **Other:** - One failing `CertificateChanges` observer no longer stops the others. - `InMemory:` stores share their contents per path, and `InMemoryStoreProvider` is `IDisposable`. ### WoT (`Opc.Ua.Types/Wot`) - **Projection security:** projection security schemes whose qualified names collide are refused. New diagnostic `WotDiagnosticCode.ProjectionSecurityConflict = 6063`. - **Input handling:** - Invalid Unicode (lone surrogates, bad UTF-8) is rejected as `JsonException`. - External-schema results are keyed per affordance. - A duplicate security-floor member is rejected. - `nsu=` ids are percent-encoded (Part 6 5.1.12). - The configured JSON depth is honoured on re-parse. - An oversized document is reported before it is parsed back. - **Performance and limits:** - Subtype-graph validation, `componentOf` linking and the namespace table are now linear. - Namespaces are capped at UInt16. ### New or changed public API - `ICertificateValidatorProvider` (server) - `SecurityPolicyInfo.GetUserTokenSignatureData(..., MessageSecurityMode)` overload - `XmlDecoder.TreatWhitespaceOnlyStringsAsEmpty` - `UaTypeDescription.IsStructureOptionSet` plus a constructor overload - `WotDiagnosticCode.ProjectionSecurityConflict` - `StatusCodes.BadIndexRangeDataMismatch` in the `Opc.Ua.Types` list - `InMemoryStoreProvider : IDisposable` ## Not changed / open - **Deferred:** - S1-14 (BSD OptionSet size needs the base type in `UaTypeDescription`, and BSD is deprecated). - C2-7 (restoring the own-certificate trust exemption would accept certificates the spec says to reject; removing the dead code is a separate decision). - A1-4 (config values keep surrounding whitespace, as the pre-April-2026 loader did). - H-2 (JsonDecoder has no real nesting counter). - A2-3 (the StringTable cap also applies to diagnostics tables; default `MaxArrayLength` already bounds them). - **Needs a product decision:** - The general `ConvertToString` writes a QualifiedName as `ns:Name`, while Table 121 drops the namespace. - Short (< 32 byte) client nonces are accepted on None channels. ## Verification - Every commit added a regression test that fails without its fix, where practical. - Before the rebases, with all audit and review fixes (before the `Spec: #…` commits): 0 build warnings and 16 test suites green on net10.0. The suites: Types, Core, Core.Encoders, Core.Security, Core.Schema, Client, Client.ComplexTypes, Server, Sessions, Gds, History, Features, Redundancy.Server, PubSub, WotCon and WotCon.Bindings. Core hit its known intermittent end-of-run hang once, and reruns were clean. - The `Spec: #…` fixes were verified per group on their own suites. Those include PubSub.Udp, Redundancy.PubSub, PubSub.Server, Configuration and SourceGeneration.Core. - **Not yet built or tested on this base.** It was rebased onto master (resolving overlaps with #4522, #4540 and #4564) and then onto #4569. This PR stays a draft until the full run on this base is green. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: marcschier <11168470+marcschier@users.noreply.github.com> Co-authored-by: Marc Schier <marcschier@users.noreply.github.com>	2026-09-29 11:14:15 +00:00
romanett	a0d569d756	Fix Server and GDS audit findings, review findings and spec-conformance gaps (#4571) ... ## Summary Fixes the findings of a bug audit of `Opc.Ua.Server`, `Opc.Ua.Gds.Server` and `Opc.Ua.Gds.Client`. Rebased on master after #4516. What went in: - **Audit:** 93 findings, each checked against the OPC UA specification. - **Code review of those fixes:** 35 further findings. - **Spec grounding of every fix commit:** 18 conformance gaps, now closed. Commits are one per finding, named `Fix <ID>`, `Fix review <ID>` or `Fix spec gap <name>`. The IDs refer to the audit report (S = Server areas, G1 = GDS server, G2 = GDS client). Validation: - Each finding was traced in code and checked against OPC 10000 (parts 3, 4, 5, 9, 11, 12, 13, 18, 20). - Every fix commit was checked against the spec text again afterwards: 0 non-conformant, remaining gaps fixed. - Regression tests were added for most fixes. - Suites run on net10.0 before the rebase: Server, GDS, History, Configuration, Features, Core.Security, DI, Redundancy, LDS, InformationModel, PubSub.Server, Client, Sessions and the three Subscriptions suites, all green. The same suites on the rebased branch are still running; results will be posted as a comment. ## Behaviour and user-facing changes ### Secure defaults - **`Historize()` / `HistorianBuilder`** grant HistoryRead only. History writes need an explicit `historyAccessLevel: HistoryRead | HistoryWrite`. - **File-system mount:** - Anonymous sessions can no longer create, delete, move or open files for writing (`Bad_UserAccessDenied`). - UserWritable and UserExecutable now reflect the user. - `AllowAnonymousWrite` restores the old behaviour; the ReferenceServer sample turns it on. - **Default PKI root** for the hosted server, hosted GDS, hosted LDS and `OpcUaApplicationConfigurationProvider`: - Moved from the shared temp directory to `{LocalApplicationData}/OPC Foundation/{ApplicationName}/pki`, and startup fails if no per-user directory exists. - When certificate stores of an earlier version still exist under temp, a warning names both paths. Existing deployments that relied on the default get a new application certificate (and the hosted GDS a new CA) unless `PkiRoot` is set to the old path. - **GDS:** - `GdsServerOptions.AutoApprove` defaults to `false`. - The default KeyCredential store grants no roles unless `AuthorizeRoles` allows them. - Certificate requests (StartSigningRequest, StartNewKeyPairRequest, FinishRequest) need an encrypted channel. - **Hosted server anonymous logins:** - Anonymous is rejected (`Bad_IdentityTokenRejected`) when the default authenticator options disable it. - A custom `AddIdentityAuthenticator<T>()` on its own no longer disables anonymous. - With anonymous disabled and no configured token policies, the endpoint advertises the authenticators' token types instead of Anonymous. - **Runtime-added roles:** their properties and methods need SecurityAdmin over an encrypted channel, like the well-known roles. - **Disabled users:** users disabled through Part 18 UserManagement can no longer log in through `RegisterDefaultAuthenticators(IUserDatabase)`. ### GDS server (Part 12) - **Certificate requests:** - FinishRequest / ReadRequest with another application's RequestId returns `Bad_InvalidArgument`. - Every Start*Request returns a new RequestId. - A CSR without the ApplicationUri is rejected (`Bad_CertificateUriInvalid`). - An abstract or unsupported certificate type is rejected at Start (`Bad_InvalidArgument`). - **Private-key password:** no longer persisted in the JSON applications database. A password saved by an earlier version is read into memory once and dropped on the next save. - **CheckRevocationStatus:** validates offline against the GDS's own trust lists and CRLs. It returns Good for good GDS-issued certificates and `Bad_CertificateInvalid` for input that is not a certificate. - **Certificate-group trust lists:** - Writes need CertificateAuthorityAdmin; SecurityAdmin and application admins are read-only. - Writes are validated with the Part 4 certificate validation. - **AuthorizationService:** - The legacy RequestAccessToken applies `AccessControl` and issues the token for the session identity. - StartRequestToken passes the session identity to every identity-aware provider. - Unknown ResourceIds return `Bad_NotFound`. - Expired token requests and refresh tokens are pruned, with at most 10 000 pending requests (`Bad_TooManyOperations`). - **KeyCredential:** requests with PublicKey + SecurityPolicyUri are rejected with `Bad_SecurityPolicyRejected` (secret encryption is not implemented); a PublicKey without SecurityPolicyUri is rejected with `Bad_InvalidArgument`. - **Audit events:** access-token audit events no longer contain the password or token data. - **RegisterTickets / UnregisterTickets:** need the RegistrarAdmin role when called from a session. - **Managed application nodes:** moved from namespace 0 to their own namespace (`ManagedApplicationsNamespaceUri`); the NodeId is the ApplicationUri, and the mandatory child properties exist. - **Hosted GDS:** - New `GdsServerOptions.CertificateGroups` (`GdsCertificateGroupOptions`), bindable from configuration. - The mandatory DefaultApplicationGroup is always present. - The default CA subject uses the resolved application name. - **JSON applications database:** - A corrupt file throws instead of being silently replaced by an empty database. - Saves are atomic and write in place on bind mounts; on net8+ builds they also follow symlinks and keep the Unix file mode. - Issued certificates and trust-list links survive a reload. ### GDS client - **Trust-list download:** - Reads until an empty chunk (Part 20 short reads). - A size-limit rejection of the final end-of-file read, as sent by released servers, counts as end of file. - **Default certificate group:** a null group means DefaultApplicationGroup, and vendor groups in other namespaces are no longer mistaken for well-known groups. - **Status codes and errors:** - Missing directory proxies report `Bad_ServerNotConnected`. - Short or wrongly typed method outputs throw `BadUnexpectedError` / `BadTypeMismatch`. - **GdsAccessTokenProvider:** no longer caches a failed client task, and one caller's cancellation no longer fails other callers. ### Trust lists, push and ConfigurationFile (Part 12 / Part 20) - **AddCertificate:** - `IsTrustedCertificate=false` returns `Bad_CertificateInvalid`. - Added certificates are validated (Part 4), and a certificate revoked by a current CRL returns `Bad_CertificateRevoked`. - **CloseAndUpdate:** validates the uploaded list against its own certificates and CRLs, not the stores it replaces. Validation failures are no longer recorded in the server's Rejected store. - **RemoveCertificate:** removing a trusted or issuer CA that other certificates still need returns `Bad_CertificateChainIncomplete`. - **Handles:** - Several read handles may be open at once. - Any open while a write handle exists returns `Bad_NotReadable` / `Bad_NotWritable`. - A write open while any handle is open returns `Bad_NotWritable`. - Handles of closed sessions are released. - Idle handles close after ActivityTimeout (default 60 s). - **Status codes:** - Read clamps to the remaining bytes and no longer enforces the size limit. - Oversized Write / AddCertificate returns `Bad_RequestTooLarge`. - Unsupported open modes return `Bad_NotSupported`. - **ConfigurationFile.CloseAndUpdate:** - Empty Targets return `Bad_InvalidArgument`. - The ConfigurationUpdatedAuditEvent is raised with the configuration owner as source. - With the new `IApplicationConfigurationFileTargetProvider`, providers receive the Targets, a bad target returns Uncertain with per-target results, and session-interrupting updates are applied after RestartDelayTime. - **Default namespace permissions:** namespaces registered after the first permission lookup now get their NamespaceMetadata default RolePermissions and AccessRestrictions (no stale negative cache). ### Sessions, identity and roles (Part 18) - **Session timeouts:** a failure closing one timed-out session no longer stops the session-timeout monitor. - **ChangePassword:** an empty old password returns `Bad_IdentityTokenInvalid`. - **Removing or disabling a user:** closes only that user's UserName-token sessions. - **Role configuration changes:** roles granted by an `ImpersonateUser` mapping are kept. - **X509Subject rules:** a certificate subject value containing a quote never matches an X509Subject rule. - **`ImpersonateUser` callback:** no longer runs under the global session lock. - **Session diagnostics:** LocaleIds are kept as the client sent them, while null LocaleIds are ignored for translation. ### Subscriptions and monitored items (Part 4) - **Acknowledgements:** a failing acknowledgement returns a per-entry Bad status instead of failing the whole Publish. - **`DiscardedMessageCount`:** counts messages dropped from the retransmission queue and unsent overflow messages. - **Durable subscriptions:** transferring a restored anonymous subscription works (no NullReferenceException). - **Transferred subscriptions:** sampling and permission checks use the item's current owner session. - **Access denied:** a monitored item whose user may no longer read the attribute gets a `Bad_UserAccessDenied` notification instead of going silent. Non-Value attributes need Browse permission (RolePermissions needs ReadRolePermissions), and User* attributes are evaluated per subscriber. - **ModifyMonitoredItems:** a SamplingInterval of -1 uses the subscription's publishing interval. - **AggregateFilter priming:** needs HistoryRead / ReadHistory permission and is bounded (100 000 values, bounded page size). - **Resource leak:** event monitored items no longer leak a consumer task per create/delete cycle. ### Node management services (Part 3 / Part 4) - **Reference types:** AddNodes, AddReferences, DeleteReferences and Browse reject ids that are not ReferenceTypes with `Bad_ReferenceTypeIdInvalid`. AddNodes, AddReferences and DeleteReferences also reject abstract ReferenceTypes; Browse still accepts them (e.g. `HierarchicalReferences` with includeSubtypes). - **Concurrent AddNodes:** duplicate BrowseNames under one parent get `Bad_BrowseNameDuplicated`. - **TranslateBrowsePathsToNodeIds:** - Requires Browse permission on intermediate nodes and final targets (RolePermissions and AccessRestrictions). - A long RelativePath no longer rejects the whole request. - **SemanticChangeEvent:** - Raised once per actual change of a semantic property, whether or not it is monitored. - Also raised for properties with the SemanticChange access-level bit. - Reports the owning node's TypeDefinition as AffectedType. - **Localized diagnostics:** operation-level text is translated when OperationLocalizedText is requested. ### History and aggregates (Part 11 / Part 13) - **DeleteRawModified:** an unspecified or reversed range returns `Bad_InvalidTimestampArgument`, and StartTime == EndTime deletes the value at StartTime for every provider. - **ReadAtTime fallback:** reads only the values around each requested time. A time whose bound is not found within the search limit returns `Bad_BoundNotSupported` instead of failing the request. - **ReadProcessed:** a ProcessingInterval shorter than one tick returns `Bad_AggregateInvalidInputs`. - **Delta / DeltaBounds:** widen to the next larger signed type when the result does not fit the source type (e.g. a decreasing unsigned counter, or an Int16 overflow). - **Range / Range2:** return the source data type. ### Alarms and fluent API (Part 9) - **Suppression:** an alarm stays suppressed while any suppression group is active, and re-evaluation without a state change does not move TransitionTime. - **`MonitorVariable(variable)`:** sets SourceNode, SourceName and InputNode to the variable and makes it a ConditionSource (HasCondition to the alarm, HasEventSource from the object). - **Fluent input/output arguments:** InputArguments / OutputArguments added through the fluent API to a registered method are readable. - **Root notifiers:** a failed root-notifier registration no longer leaves an orphaned event worker. - **State-machine handlers:** exceptions are logged at Error. ### File system (Part 20) - **Delete / MoveOrCopy:** - Only act on direct children of the directory. - A NodeId whose kind does not match the entry returns `Bad_NotFound` (a file NodeId can no longer delete a directory). - Copying a directory into its own subtree returns `Bad_InvalidArgument`. - **Locking:** - An open file, or a directory containing one, cannot be deleted or moved (`Bad_InvalidState`). - The check is atomic with opens. - While a Delete or Move runs, read opens get `Bad_NotReadable` and write opens `Bad_InvalidState`. - **Open:** - Reserved mode bits or EraseExisting without Write return `Bad_InvalidArgument`. - Read+Write returns `Bad_NotSupported`. - Read while a writer is open returns `Bad_NotReadable`. - **Client `FileSystemErrors`:** maps `Bad_NotReadable` to `IOException`. - **RuntimeNodeSet:** well-formed NodeSets with a stray `Model` element, or two models in one file where one requires the other, now load. ### Server core, hosting and lifecycle - **`SessionEstablishmentQueueLimit` > 0:** CreateSession/ActivateSession now queue for a permit. The permit is acquired before the request is registered, and a waiting handshake releases its worker through the request-parking policy. - **Node manager lifecycle:** - Add, reload and remove no longer wait for parked Publish requests. - A Migrate reload racing with CreateMonitoredItems no longer blocks later lifecycle operations. - Late items on retired or removed managers get `Bad_NodeIdUnknown`. - **HistoryUpdate:** a batch mixing data and event details is bounded by both limits. - **Server stop/start:** stopping the server disposes the configuration watcher and certificate subscription; starting recreates them. - **Monitored-item queue factory:** a factory supplied by the caller or the DI container is no longer disposed by the server. - **Audit events:** each certificate validation error raises its own AuditCertificate event. A failed OpenSecureChannel without a service result is audited as failed. ## New public API (additive) - `IQueuedSessionEstablishmentLimiter` - `StandardServer.OwnsMonitoredItemQueueFactory` (protected virtual) - `DefaultPkiRoot.Get` (Opc.Ua.Configuration) - `TrustList.SetCertificateValidation` - `NamespaceMetadataRegistry.Invalidate` - `IApplicationConfigurationFileTargetProvider` and `ApplicationConfigurationUpdatePlan` - `GdsServerOptions.CertificateGroups` / `GdsCertificateGroupOptions` - `InMemoryKeyCredentialRequestStore.AuthorizeRoles` - `DefaultManagedApplicationsNodeManager.ManagedApplicationsNamespaceUri` - `AuthorizationServiceManager.RequestAccessTokenAsync(..., IUserIdentity?, ...)` - `AllowAnonymousWrite` on the file-system node manager and its factory - `IFileSystemHost.TryBeginMutation` / `EndMutation`, replacing `HasOpenHandles` ## Not fixed / known limitations - **KeyCredential:** secret encryption with the client's PublicKey (requests needing it are rejected). - **CSR SAN restriction:** restricting subject / SAN values copied from a CSR (CA policy). - **Ticket signatures:** ticket signature verification (needs a trusted-signer configuration). - **FileType Read+Write open:** needs a read/write stream contract in `IFileSystemProvider`. - **Custom `IUserDatabase` implementations:** the disabled-user check still scans all users per login. The built-in stores do a single lookup. - **64-bit Delta precision:** limited by the calculator's double arithmetic. ## Tests with changed expectations Existing tests were updated where they asserted the old behaviour: - File-system status codes - Trust-list handle eviction - `DiscardedMessageCount` - Localized diagnostics bits - Delta on unsigned sources - SourceNode of fluent alarms - ReferenceServer transfer permission test (now expects `Bad_UserAccessDenied` notifications) - `UserDeactivationShutdownReviewTests` (the revoked session is a UserName login) 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>	2026-09-29 07:26:05 +02:00
Marc Schier	46fa7d364a	Harden recovery, concurrency, and resource lifetimes across the OPC UA stack (#4516) ... # Description Bound managed-session recovery, preserve Publish workers and recovery ownership, and address the client, server, transport, and certificate audit findings and subsequent concurrency review. Also reduce the memory retained by exhaustive session-test diagnostics. ## Recovery and Publish ownership - Add `ManagedSessionOptions.ChannelReconnectTimeout` through direct construction, the fluent builder, and DI. The automatic duration is `max(3 * KeepAliveInterval, revised SessionTimeout, OperationTimeout)`, sampled at cycle start. Positive overrides are supported; `Timeout.InfiniteTimeSpan` explicitly opts out. Raw sessions retain their unlimited default. - Add `CreateReconnectBudget(TimeProvider)` as a required `IReconnectParticipant` member, as agreed in review. Custom participants implement it and may return null for no participant-specific bound. - Enforce the earliest participant/caller deadline through transport reconnect, activation/recreation, and subscription restoration. Late callers can shorten an active cycle but cannot extend it. - Cancel and unwind recovery, fence late responses, and release channel recovery ownership before the existing `Faulted` event hands control to the outer reconnect/failover policy. Preserve session recreate admission through final Publish cleanup and keepalive suppression until shared recovery is complete. - Treat participant budget creation/evaluation failures, including exceptions at the exact deadline, as terminal shared-recovery failures. Notify participants before exposing `Faulted`, preserve the original diagnostic, and never silently replace a finite budget with unlimited recovery. - Keep caller-supplied replacement channels, managed bindings, wrapper event subscriptions, and recovery-owner identities consistent across success, failure, and cancellation. Reject replacement during active recovery and fence retired callbacks so they cannot clear newer ownership or suppress later keepalive recovery. - Retain eligible Publish workers through temporary subscription-identifier clearing without retaining workers for never-created or removed subscriptions. Preserve cancellation, acknowledgement rollback, and drain-before-replacement ordering. - Coordinate automatic subscription updates with session recovery: cancel admitted updates, keep them paused across a failed-restoration handoff, and retry only after explicit restoration completes. This prevents competing CreateSubscription requests and updates against a retiring session, while preserving manual recreation, transfer fallback, and pending option changes. - Exercise the real ManagedSession, V2 subscription engine, and channel ready gate with scripted transports and an injected clock. Cover transfer fallback, deadline handoff, late completions, and resumed notification delivery. ## Audit and review corrections - Correct certificate/trust-list transactions, change-pump lifetimes, validation, peer revalidation, and reset/resource ownership. - Harden node admission, attribute/range/dimension validation, monitored-item sampling and lifecycle transitions, event fanout, and server shutdown. Run lifecycle readiness and compensation outside shared monitored-item admission, with stale-completion ownership checks. - Close synchronous node-manager admission before teardown and retain resources until admitted service, lifecycle, and asynchronous method work returns. Dispose the monitored-item manager outside both locks, reject late calls before they can reach it, and forward asynchronous disposal through the adapter so the master awaits the same completion. Preserve reentrant shutdown initiation, cancellation/failure unwinding, and shared cleanup-failure reporting. - Bound WSS pending-request retention using connection-local wire handles while preserving caller-visible request handles and translating Cancel targets. Safely ignore retired replies and drain admitted send/close users before resource disposal. - Clarify that the shared `ClientBase` caller-handle sequence is distinct from the non-wrapping WSS wire allocator. Existing exhaustion/reopen, late-reply, and Cancel-translation regressions verify the connection-local contract; no allocator behavior was changed by this clarification. - Preserve virtual-node validation and resolver service errors instead of converting them to cached misses. A mismatched NodeId reports `BadNodeIdInvalid`; callback type mismatches and resolver service errors keep their exact status. Per-item boundaries preserve unaffected reads, writes, history operations, method calls, browse paths, and monitored-item creation/restoration, including permission-validation paths. Caller cancellation still propagates; stored-item validation failures are logged without aborting later restores. - Correct client file/role/state-machine/streaming APIs, node-cache behavior, redundancy/failover ownership, and session configuration/identity handling. - Cancel each owned peer-discovery scope before disposing it, including when the bounded wait wins a cancellation-delivery race. Keep late results out of the endpoint cache and preserve single-flight lookup ownership. - Keep materialized alias Browse results synchronized with the live store by default, preserving explicit startup-only opt-out. Apply HistoryUpdate service results per value while retaining explicit all-or-nothing provider APIs. - Update the directly related feature documentation and add focused positive, negative, concurrency, and ownership regressions. ## Latest review-feedback corrections - Fence stale failed lease observations with a successful-confirmation generation distinct from the revocation epoch. Snapshot it before each store read, including failed-CAS revalidation, so an old failure cannot revoke or reschedule a newer lease while fresh ownership loss still revokes leadership. Preserve independent overlapping acquisitions, expiry, disposal, and late-success protections. - Isolate attributable WSS response-decoding errors to their request, including retired handles. Keep admitted socket sends connection-owned so caller timeout/cancellation cannot abort sibling requests; shutdown still cancels and drains those sends. - Restart keepalive and classic Publish replenishment after successful session reuse. Retire V2 worker demand after intentional deletion/disable without confusing that state with temporary recovery resets. - Browse virtual directories lazily across continuation pages without the 1,024-entry snapshot cap. Preserve active-page cancellation, bounded metadata retention, pushback, and exactly-once asynchronous cursor cleanup. - Apply certificate/CRL staging in last-operation order, preflight required issuer storage before writes, select actual policy-compatible RSA keys for None endpoints, frame certificate chains independently of signature OIDs, and preserve admitted validation results during rejected-writer shutdown. - Preserve base asynchronous disposal when a legacy override omits its base call; avoid double derived disposal in the adapter. Let genuinely admitted nested work finish while rejecting stale captured contexts and returning null from closed lookup APIs. - Re-park recovered monitored items if AddNodes rolls back. Give event compensation a fresh finite deadline, and preserve healthy Browse/Translate siblings at every reference/path boundary while retaining starting-node errors and caller cancellation. - Give final reconnect notifications a live, bounded shutdown-linked lifetime. Synchronize child state before parent lifecycle handlers outside the parent transition lock. - Document the accepted existing policies: direct reverse connections are single-use without a ReverseConnectManager, and multi-node stream capacity is shared rather than reserved per node. The expanded readiness controls also exposed a real generation-handoff race: an old source could finish draining after activation was deferred but before readiness tasks were collected, causing the wanted replacement to be omitted from the wait set. A deterministic test gates that exact interval; the fix keeps the replacement in the readiness wait. The original race passed 200 repetitions after the fix. A separate control now awaits both producer readiness and iterator entry under the same original deadline, rather than treating those independent signals as equivalent. Temporary logging and repetition are removed. ## CI integration contracts The History and Server CI failures exposed integration tests that still asserted the behavior intentionally changed by the audit fixes. A Windows WoT negative test raced its caller deadline against upstream retries. A subsequent Ubuntu Client failure exposed a real automatic-update versus explicit-restoration race: - History insertion collisions now verify exact per-value statuses and all persisted timestamps/values, including preservation of the existing conflicting entry. Explicit atomic-provider rollback controls remain. - Alias materialization tests wait for actual publication and verify the added node plus forward/inverse `AliasFor` references, instead of racing a startup-only snapshot expectation. Explicit refresh opt-out controls remain. - The unavailable-upstream WoT test uses an explicit finite retry policy through existing DI configuration, preserving its original four-minute guard and requiring a mapped-value service error before caller cancellation. Production retry defaults remain unchanged. - The Client fix retains the exact one-create and late-response assertions. Three deterministic real-subscription/real-manager cases cover paused creation, disposal while paused, and cancellation of an admitted create followed by explicit restoration and a pending option update. Both composed restoration-deadline cases also prove automatic updates stay blocked at the outer handoff and resume after restoration. - The merged-head net48 correction prevents lost peer-resolver cancellation and distinguishes the harness's delayed initial `Connected` event from actual outer recovery completion. A deterministic timer-order test covers both cooperative and cancellation-ignoring resolvers, cancellation before return, rejection of late cached results, and a fresh subsequent lookup. - The remaining CodeQL alert was a false content flow through `ArrayOf.Count` into an integer-only trust-list summary. Projecting the same count through `Span.Length` keeps cardinality distinct from serialized contents without allocating, dropping diagnostics, suppressing the rule, or dismissing the alert. Five log-contract cases cover null/empty/nonempty results and mixed chain-capable/fallback listeners, asserting the exact count, message, and structured properties. - Classic transfer acknowledges messages selected for asynchronous Republish only after their responses arrive. The existing locked replay-selection decision returns the immediate-acknowledgement subset to Session, preserving the public transfer API, advertised availability, and immediate acknowledgement of older gapped messages not selected for replay. A callback changing `RepublishAfterTransfer` cannot change the already-selected acknowledgement ownership. - Transfer integration tests explicitly control acknowledged versus retained origin messages. Exact assertions distinguish retained replay from requested fresh initial values by sequence number, client handles, values, status, and source timestamp. Atomic counters, observed delivery/keepalive progress, and failure-safe session/file cleanup replace timing assumptions and racy resets. - Server lifecycle tests verify the documented independent five-second compensation deadline rather than requiring a non-cancellable token. They cancel the actual request, prove compensation and unrelated monitored-item creation still proceed one tick before the deadline, preserve the original failure and ownership assertions, and verify the completed deadline is retired. - Synchronous and asynchronous directory-browser tests require the exact provider exception instead of an empty-directory success, then verify the failed cursor is not enumerated again. These correct expectations left behind by the intentional, documented provider-error propagation change; production behavior is unchanged. No tests were disabled, assertions loosened, coverage thresholds lowered, or CI checks made optional. Existing platform exclusions and Explicit debug variants remain. ## Related Issues - Fixes #4514 - Fixes #4515 - Builds on merged #4503 and retains the #4508 publishing-drain behavior. ## Validation **Lease-election review correction (`a13afa641182c70983e16bbcfebf507e666a45a5`):** The correction is based on the existing upstream merge `43079e2b851fe338a4082066f8d14abfdafb6e32`. Three deterministic stale-verdict cases fail on the original source and pass with separate confirmation fencing. Six new cases cover the initial foreign-owner verdict, failed-CAS revalidation in both invocation orders, and fresh ownership loss through both read paths, including revalidation begun after another successful confirmation. | Target and configuration | Passed | Failed | Skipped | | --- | ---: | ---: | ---: | | net10.0 Debug | 120 | 0 | 0 | | net48 Debug | 120 | 0 | 0 | The selection is the full `Opc.Ua.Core.Tests.Redundancy` namespace, including all 38 `SharedStoreLeaseElectionTests` cases and the existing expiry, clock rollback, disposal, and overlapping-success regressions. New witnesses are `StaleForeignLeaseReadDoesNotRevokeNewerAcquisitionAsync`, `StaleFailedRevalidationDoesNotRevokeNewerAcquisitionAsync`, and `FreshForeignLeaseObservationRevokesLeadershipAsync`. They assert resulting leadership, exact transitions, independent progress, and the unchanged expiry boundary. Retaining the initial generation for the fallback read independently makes the fresh-loss-after-confirmation control fail; that mutation was removed before the final rebuilt runs. The successful scoped command is `dotnet test tests\Opc.Ua.Core.Tests\Opc.Ua.Core.Tests.csproj -c Debug --no-restore --filter "FullyQualifiedName~Opc.Ua.Core.Tests.Redundancy"`, with `CustomTestTarget` and `-f` matching each row and that framework's assets restored. Both changed C# files pass formatting and analyzers through informational severity on both frameworks. These are scoped results, not a full-solution test or measured coverage-delta claim. CI monitoring is paused for this feedback-only operation; no current-head CI success is claimed. **Latest CI contract correction (`1cd1f2047bb5b50c9bf300b1ff710b0b2e935a29`):** All four failing Server shard 23 jobs in [run 36120946740](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/36120946740) reported the same six cases. Two local replays reproduced all six failures. The source changes and documentation from `cd43b831a` establish both intentional contracts: independent bounded event compensation and surfaced provider errors. Only the two test files are corrected; production code and CI policy are unchanged. | Target and configuration | Passed | Failed | Skipped | | --- | ---: | ---: | ---: | | net48 Debug | 113 | 0 | 0 | | net10.0 Release, CI Coverlet settings | 113 | 0 | 0 | The selection contains `MonitoredItemManagerLifecycleTests`, `DirectoryObjectStateTests`, `DirectoryBrowserBoundedEnumerationTests`, and `EventCompensationReadinessHasFiniteDeadlineWithInfiniteSourceTimeoutAsync`. Both changed files pass formatting and analyzers through informational severity on both frameworks. Independent mutations restoring a non-cancellable compensation token and swallowing provider errors fail all four lifecycle cases and both browser cases, respectively. Both mutations were removed before the final passing runs and commit. The scoped command is `dotnet test tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj` with `CustomTestTarget` and `-f` set to the selected framework, `--no-restore`, and `--filter "FullyQualifiedName~MonitoredItemManagerLifecycleTests|FullyQualifiedName~DirectoryObjectStateTests|FullyQualifiedName~DirectoryBrowserBoundedEnumerationTests|FullyQualifiedName~EventCompensationReadinessHasFiniteDeadlineWithInfiniteSourceTimeoutAsync"`. The modern run additionally uses `-c Release /p:CollectCoverage=true --collect "XPlat Code Coverage" --settings tests\coverlet.runsettings.xml`. These are scoped results, not a full-solution test or measured coverage-delta claim. Hosted checks for that commit were pending at publication. The fail-fast CI watch was stopped when the requested operation switched to review feedback; no current-head CI success is claimed. **Earlier master merge (`8b15ea6ef9fc2214ac8ec886f373bb3846dd6d6f`, base `b4136d8e9bab0df680f41d9ef985f519160534b1`):** The `TcpListenerChannel` conflict preserves both lifetime responsibilities: disposal clears the retained peer-certificate chain and unregisters the quota-scoped message-assembly scheduler. Both fields and all upstream deadline handling remain intact. The only additional manual source adjustment adds the parentheses required by the existing analyzer around the session-count fallback. Master advanced during validation. The initial transport merge `80303c434ce813cf75aa7fe54a6a32fe2aeafc30` was retained, and the newer base was merged normally in `8b15ea6ef9fc2214ac8ec886f373bb3846dd6d6f`, without rewriting history. The additional recovery, fluent-pipeline, and test-framework overlaps were inspected; the branch's cancellation, validation-error, and acknowledgement ownership fixes remain alongside the upstream changes. Full `UA.slnx` builds passed on net10.0 and net48 with **0 warnings and 0 errors**. The final scoped tests rebuilt against the committed tree `2074f8efcb61d8d9c6106e7d6f76ee941940e358`: | Target | Passed | Failed | Skipped | | --- | ---: | ---: | ---: | | net10.0 | 2,653 | 0 | 0 | | net48 | 2,529 | 0 | 7 | The net48 skips are existing platform exclusions: six RSA_DH_AesGcm nonce cases and one ClientWebSocket certificate-validation case requiring .NET 7 or later. The selection covers transport cleanup, reassembly budgets/deadlines/admission, peer-chain ownership, server session binding, fluent lifecycles and source generation, reconnect and keepalive, transfer acknowledgements, Publish queues, and JSON encoding. Modern-.NET WSS transport and real-server integration cases also pass. The resolved file passed solution-relative formatting and analyzer verification through informational severity on both frameworks. These are scoped test results, not unfiltered full-suite or measured-coverage claims. Hosted CI was not monitored or repaired as part of this merge-only operation. Selected local results below are overlapping validation runs, not distinct-test totals. **Earlier review-feedback batch (`cd43b831a8f11de3f7d65c3681712a61e3c669a5`):** The final net10.0 scoped selection passed **471 tests, with no failures or skips**. The final net48 solution-root selection passed **439 tests, with no failures and one unchanged platform skip** (`ValidateServerCertificateFallsBackToTlsPolicyErrors`, which requires newer ClientWebSocket certificate-validation support). Both full nonincremental solution builds completed with **0 warnings and 0 errors**, and all **40 changed C# files** passed informational-level formatting/analyzer verification. Both frameworks validated the identical final tracked diff. The focused matrix covers every one of the 20 current review threads, including real mid-frame WSS cancellation, stale admission contexts, directory continuation ownership, multi-element Browse/Translate failures, and the readiness drain race. The net10.0 solution-root test command has a separate pre-existing runner conflict: three unrelated AOT projects reject the VSTest target under Microsoft.Testing.Platform 2.4.0 and SDK 10. Per-project net10.0 results are recorded separately; no runner migration, test exclusion, assertion relaxation, or CI-policy change is included. These are bounded selections, not unfiltered full-suite or measured coverage claims. At publication of `cd43b831a`, hosted CI was not green: the `OPCFoundation.UA-.NETStandard` check reported `ACTION_REQUIRED`, AppVeyor reported `FAILURE`, and the two signed-build jobs were in progress. No CI jobs were rerun, cancelled, approved, or repaired as part of that feedback-only operation. **Classic transfer correction (`f425376fca045794122e19aaf9cafebc4a717d91`):** The preceding head's [macOS net10.0 shard 25/30](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/35980326299/job/107570512458) failed `TransferSubscriptionTest(DisconnectedRepublish).TransferSubscriptionAsync(True,False)` at the static-node count assertion: expected 10, received 20. The trace contains a successful, explicitly requested republish of retained sequence 1 and a fresh initial-value batch at sequence 3, not duplicate dispatch of one response. Controlled lost origin acknowledgements reproduced that incorrect test expectation on both the preceding PR head and exact master base `a2539cb53dd1666cef856f33812d7a8830d68909`. The maintainer explicitly authorized correcting this existing issue in the PR. Retained replay and requested initial values are independent, as specified by [OPC UA Part 4, TransferSubscriptions](https://reference.opcfoundation.org/specs/OPC-10000-4/5.14.7). The reason that the original hosted run retained its particular origin message remains unproved. The expanded full-suite run then exposed a **real production race**, not just a count assertion: Session queued acknowledgements for all transferred available messages before the asynchronous Republish responses arrived. Publish could delete those messages first, causing `BadMessageNotAvailable`. A gated real-Session/classic-engine regression failed both replay-enabled cases on the original implementation while both no-replay controls passed. The ownership fix passes all 24 combinations of empty/consecutive/unsorted-gapped queues, replay preference, sequential delivery, and a reentrant preference change. All 40 normal real-server transfer cases pass on both frameworks. Independent mutations suppressing actual replay and duplicating observed sequence records each fail the intended assertion; both mutations were removed. The full classic suite passes on both frameworks. Hosted CI was pending when that correction was published; the earlier failed hosted job was not rerun for a lucky pass. **Local net48 caveat:** the full Client run timed out in the pre-existing fake-clock test `ReconnectAsyncSwapsFaultedLeaseEntryAsync`, which does not exercise subscription transfer. Its unchanged isolated replay passed, but that does not resolve the full-suite timeout. No unrelated code or assertions were changed, and a clean full Client net48 run is not claimed. | Scope | net10.0 | net48 | | --- | --- | --- | | Full Client.Tests after transfer acknowledgement correction | 2,549 passed | 2,552 passed, 1 timeout failure noted above, 1 existing platform skip | | Full classic-subscription project after transfer correction | 57 passed, including all 40 normal transfer cases | 57 passed, including all 40 normal transfer cases | | Gated transferred-message acknowledgement ownership | 24 passed, included above | 24 passed, included above | | Saved-session consumer of the shared subscription helper | 40 passed | 16 passed, 24 existing unsupported-security-policy skips | | Audit regression matrix | 2,339 passed | 1,934 passed, 34 existing skips | | Full Client.Tests after review follow-ups | 2,520 passed | Focused selections only | | Full Client.Tests after CI recovery correction | 2,523 passed, CI coverage collector | 2,527 passed, 1 existing platform skip | | Latest merged-head recovery/redundancy selection | 139 passed | 139 passed | | Full Client.Tests after merged-head net48 correction | Focused selection above | 2,529 passed, 1 existing platform skip | | Lifecycle and actual-dimension regressions | 146 passed | 146 passed | | Focused recovery follow-ups | 7 passed | 7 passed | | WSS-related fixtures | 93 passed | Not applicable | | CI History integration corrections | 28 passed | 28 passed | | CI alias, dispatcher, and explicit-atomic controls | 63 passed | 63 passed | | Full WoT sample project with CI coverage collector | 29 passed | Not applicable | | Trust-list effects and count-only summary contract | 22 passed | 22 passed | | Virtual-node feedback, node-manager, dispatcher, and lifecycle selections | 661 passed, 63 existing not-executed cases; all 48 virtual-node cases passed | 661 passed, 63 existing not-executed cases; all 48 virtual-node cases passed | | WSS wire-handle exhaustion, late replies, and Cancel translation | 9 passed | Not applicable | | Synchronous node-manager disposal and related service/lifecycle suites | 1,037 passed, 64 not-executed cases from existing fixture assumptions; all 93 sampling/disposal cases passed | 1,037 passed, 64 not-executed cases from existing fixture assumptions; all 93 sampling/disposal cases passed | - Full solution builds passed on net10.0 and net48 during the audit work. The subsequent full non-incremental net10.0 build also completed with zero warnings/errors. - Modified source/test formatting and analyzer checks passed through informational severity. - Original composed recovery regressions passed repeated runs on both frameworks. Independent mutations removing Publish cancellation, bypassing the recreate drain call, or ignoring ready-gate cancellation each failed the intended assertion; all mutations were restored before passing runs. - The latest recovery correction passed 100 executions of each original restoration-deadline scenario with unchanged assertions. Restoring premature update admission independently made both strengthened handoff cases fail; the correct retention behavior was restored afterward. - Startup-event and cancellation-delivery timing probes reproduced the subsequent net48 failures, then passed 100 executions of each of the three scenarios with the fixes. All timing probes and repetition were removed. The permanent timeout-order regression also went RED on the original cancellation cleanup without sleeps or scheduling amplification. - Final post-format recovery/subscription/engine checks passed all 151 selected cases on net10.0. The first local full net48 attempt aborted in `clr.dll` with native access violation `0xc0000005`; an unchanged-assembly full diagnostic rerun passed as recorded above. That native host crash has not been attributed or claimed fixed. - A minimal replay with the same CodeQL CLI and query-pack versions reproduced the custom-count alert and confirmed that the standard span-length projection is clean while direct sensitive-value and raw-identifier logging controls remain flagged. The source was already logging only a count; no identifier or certificate disclosure was established at the reported location. - The virtual-node feedback regressions first reproduced five error-preservation/cache failures; expanded service-dispatch cases exposed two additional whole-batch failures before the operation-boundary fixes. The final selections pass on both frameworks. Genuine misses remain cached, successful results remain reusable, failed validation allows same-cache retry, and request cancellation still stops the batch. - Three deterministic synchronous-manager disposal regressions reproduced early resource release and lifecycle calls reaching a manager during disposal. The fix passes direct and adapted calls, a sampling-worker join after the last operation exits, reentrant shutdown, cancellation and failure paths, repeated disposal, and exact rejection across 39 service/lifecycle entry points both during drain and after cleanup. The original outside-node-lock disposal regression remains and now requires the worker to observe closed admission. - Prior-head CI on `c985f8bded77a60449d9cd381c8a004d8590ccf6` completed with **168 passing checks, one expected release-package-publication skip, and no failures or pending checks**. All test shards, signed builds, container builds, the coverage check, and the CodeQL PR check passed. Hosted CodeQL analysis `1829262912` completed successfully and marks count-flow alert 385 fixed. This is evidence for that head, not a claim that subsequent review follow-ups have completed hosted CI. ### Session-test diagnostic memory Complete browse listings are streamed to unique NUnit attachments rather than retained in inline NUnit/VSTest output. Detached regression-test results are cleaned up without deleting runner-collected attachments. - Two covered session-suite runs each completed with 782 passed and 379 existing skips. Peak working set fell from 4.86 GiB to 2.44-2.78 GiB. - TRX output shrank from 303.1 MiB to approximately 40.7 MiB, retaining all 46 complete browse attachments. - Seven output regressions cover exact content, empty/single/large listings, disabled/enabled output, bounded inline summaries, and unique filenames. The separate Azure build-18452 VM deprovisioning cause remains unproved without provider logs. The memory measurements do not establish its cause. Unfiltered local `UA.slnx` tests, including the long stress/soak suites, have not been run on both frameworks. A local coverage delta was not collected; builds and focused tests are not substitutes for those claims. ## Checklist - [ ] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [ ] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] All checks on the latest review-follow-up head have completed successfully; prior-head CI passed as recorded above. - [x] I have addressed **all** PR feedback received. Tests have been added and pass as recorded above; the hosted coverage check passed on the prior head identified above. The combined tests/coverage-increase checkbox remains open because no local coverage delta was measured. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 68f26810-22b8-476f-abcd-0a8c82d6e208	2026-09-25 14:59:34 +00:00
romanett	d6356766c5	Resolve the open CTT findings: aggregate fixes, de-DE ApplicationName and CTT configuration (#4545) ... # Description Resolves the open items of `plans/ctt-issues.md` (*Needs clarification*, *Open server findings*, *CTT project configuration notes*). Each item was checked against the OPC 10000 spec text. A server change was made only where the server was wrong, and every server change has a regression test. CTT script and oracle defects are filed in Mantis instead. ### Server changes (`Opc.Ua.Server`) - **NumberOfTransitions honours TreatUncertainAsBad.** - Part 13 §5.4.3.24 does not count Bad values. §4.2.1.2 makes Uncertain values "equivalent to Bad" when TreatUncertainAsBad is True, and the aggregate definition doesn't override that. - Uncertain values are therefore no longer counted, and no longer used as the previous value, when the setting is True. The now unused `TimeSlice.NonBadEarlyBound` is removed. - **DurationInStateZero/NonZero status follows the variable's interpolation.** - §5.4.3.2.2: "A region is Uncertain if a region ends in a Bad or Uncertain value and SlopedInterpolation is used." - The calculator always built stepped status regions. So on a sloped variable, the last region stayed Good while TimeAverage2 and Total2 over the same interval were already Uncertain. - The duration value doesn't change. - **AnnotationCount returns `Bad_NoData` and sets Partial.** - Table 68 requires `Bad_NoData` for intervals before the start or after the end of data. §5.3.3.2 requires the Partial bit for incomplete intervals. - `HistorianDispatcher` now derives the start and end of data from the raw history (read with bounds) plus the annotation timestamps. It passes them to a new `CalculateAnnotationCounts` overload; the old overload is unchanged. - Three existing dispatcher tests change their expectations. For example, a node without any data now returns `Bad_NoData` instead of Good zeros. ### Reference server sample and CTT configuration - **`de-DE` ApplicationName.** The server advertises `de-DE` in LocaleIdArray, but FindServers and GetEndpoints always returned the en-US name. The sample now keys the ApplicationName and registers en-US and de-DE translations (Part 4 §5.5.2.2 / §5.5.4.2 localeIds). - **Subscription limit.** `Max Supported Subscriptions` in `samples/UAReferenceServer.ctt.xml` and `MaxSubscriptionCount` in `Ctt.ReferenceServer.Config.xml` go from 100 to 200. Subscription Publish Min 05 `003.js` needs 190 subscriptions. - **Alarm Cycle Time.** The CTT template's Alarm Cycle Time is 30 s. At 60 s it equalled `RequestedSessionTimeout`, so a Limit/Level CU that starts a run finds its session expired (C40). ### Tests only - **AddNodes duplicate BrowseName test:** `AddNodeAsync_DuplicateBrowseNameUnderParent_ReturnsBadBrowseNameDuplicatedAsync` never ran. Its items had no TypeDefinition, so its `Assume` always made it inconclusive. The finding it belongs to (AddNodes after a rename returning `BadNodeIdExists`) was already fixed by #4477. - **RequestHandle echo:** a new test covers the ServiceFault for an oversized argument in a chunked request (already fixed by #4488). - **Value-based status:** a new test covers the aggregate status with TreatUncertainAsBad = false (already fixed by #4503). ### Not changed - **GDS QueryApplications/QueryServers still return records with ServerCapability `NA`.** OPC 10000-12 §6.5.10/§6.5.11 says they "shall not", but the CTT GDS scripts expect those records. Implementing the exclusion turned 40 GDS test cases from pass to error, so it waits for the script fix ([Mantis 11458](https://mantis.opcfoundation.org/view.php?id=11458)). - **Idle SecureChannels are still closed after `ChannelLifetime`.** Keeping them open would be security relevant. The CTT configuration's `ChannelLifetime` of 120000 (#4502) covers the CTT case. ### Mantis issues filed | Id | Issue | | --- | --- | | C51 | [11458](https://mantis.opcfoundation.org/view.php?id=11458) GDS scripts expect NA records in query results | | C52 | [11459](https://mantis.opcfoundation.org/view.php?id=11459) A & C Refresh scripts leak subscriptions on the shared alarm session | | C53 | [11460](https://mantis.opcfoundation.org/view.php?id=11460) `StartThreadPublish.js` defaults misspelled properties | | U2 | [11461](https://mantis.opcfoundation.org/view.php?id=11461) Minimum2 oracle on reverse reads | | U4 | [11462](https://mantis.opcfoundation.org/view.php?id=11462) Part 13 clarification: TreatUncertainAsBad and simple bounds (DeltaBounds) | The A & C `BadSubscriptionIdInvalid` failures (Refresh, Refresh2, Shelving) come from CPU load: with other processes at 100 % CPU, all subscriptions of the CTT alarm session expire within one second. This happens with and without this PR (3 of 3 loaded runs, 0 of 2 idle runs). ### CTT verification CTT 1.05.06, scripts 1.05.513, compared at test-case level against a build of the starting commit: | Group | Before | After | | --- | --- | --- | | Aggregates | 4,562 error messages | 4,186. NumberOfTransitions: 12 test cases go from error to pass. AnnotationCount `005-01.js`/`005-02.js` pass. NumberOfTransitions `003-02.js`/`004-02.js` now fail because of C1 ([Mantis 11420](https://mantis.opcfoundation.org/view.php?id=11420)): they request TreatUncertainAsBad = false, but the harness makes the server use its default of true. | | Discovery | 10 warnings | 0. Find Servers Filter `003.js`/`006.js` and Get Endpoints `002.js` pass. | | Subscription | – | Publish Min 05 `003.js` goes from warning to pass. | | Historical Access, GDS, Node Management | – | no new failures | `plans/ctt-issues.md` is updated: resolved items leave the open sections, and the new Mantis issues are recorded. ## Related Issues - Related to #4479 (CTT configuration notes) - Follows #4502 ## Checklist - [ ] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [ ] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [ ] I have addressed **all** PR feedback received. Tests run locally on net10.0 after merging master: | Project | Filter | Passed | | --- | --- | --- | | `Opc.Ua.Server.Tests` | Aggregate, Historian, NodeManagement, Publish, Subscription | 1,419 | | `Opc.Ua.Core.Tests` | TcpServerChannelBuffer | 65 | | `Opc.Ua.History.Tests` | Aggregate, Annotation | 67 | | `Opc.Ua.Sessions.Tests` | discovery locale tests | 8 | Before the merge, the whole `Opc.Ua.Sessions.Tests` ClientTest fixture passed (372 passed, 0 failed). 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5 <noreply@anthropic.com>	2026-09-25 12:30:25 +02:00
Marc Schier	138086863b	Fix audit findings and review regressions across the OPC UA stack (#4503) ... ## Scope Audit fixes and review follow-ups across the OPC UA Core, Client, Server, transport, and redundancy components. This includes implemented Tier 1, Tier 2, and Tier 3 work; it does not claim that every item in the 244-finding audit backlog is complete. The review batch fixes mandatory full-key record protection and owned plaintext buffers; transactional pending-certificate claims; shared-channel nonce and certificate ownership; discovery and token-policy validation; reconnect/callback ordering without changing unbounded buffering defaults; server permissions, filters, monitored-item lifetime, and alarm topology; historian paging, retention, and annotations; atomic user/password metadata; and canonical file identities with bounded alias and role refresh workers. ## Review-batch verification at `ab686ccae` The following results come from fresh test builds using `dotnet test`, `--no-restore`, `-m:1`, and an explicit `CustomTestTarget`. They replace the earlier description's library-build/`--no-build` totals, which did not establish the state of the merged test sources. | Scope | Target | Passed | Skipped | |---|---|---:|---:| | Core review regressions | net10.0 | 827 | 0 | | Client and lifecycle regressions | net10.0 | 630 | 0 | | Server review regressions | net10.0 | 1970 | 0 | | Redundancy Server / Client / PubSub | net10.0 | 276 / 10 / 11 | 0 | | Sessions / file-and-alias / streaming / HTTPS-WSS integration | net10.0 | 8 / 21 / 30 / 20 | 0 | | Core review regressions | net48 | 786 | 39 | | Client recovery and policy regressions | net48 | 54 | 0 | | Server ownership, aliases, queues, and user-state regressions | net48 | 137 | 0 | Every listed run exited successfully. The 39 net48 skips are existing platform/capability cases. New key-agreement tests assert unavailable-policy behavior on unsupported targets rather than adding skips or pretending those targets performed an unsupported handshake. Additional exact node/permission/filter/alarm checks passed 13 Core and 46 Server cases. The PR-scoped formatter verification covers 26 projects and 389 non-generated C# files. A Roslyn syntax audit covers 53 changed interfaces and 263 members, with no missing parameter/type-parameter/return contracts and a 120-column limit for their declarations and documentation. No full-solution, all-target-framework, or NativeAOT matrix is claimed from these local runs; the new CI run must establish its own result. ## CI follow-up at `e1bc3ac3b` The follow-up fixes the failures reported by Azure build 18400. TLS certificates retain configured DNS names, including mixed-case URI schemes, without relaxing hostname validation. Reverse-WSS fixtures use the DNS identity in the client certificate. Reconnect completion is published only after cycle cleanup, so a subsequent reconnect cannot join an old completed cycle and retain old certificates. Certificate-alarm roots now support event subscriptions. The pump sample has one continuous notifier path, with no duplicate shortcut. Historian and aggregate fixtures share the provider's retention clock. Alarm collection lets the server expire idle Publish requests rather than canceling only the client wait. The corrected server, WoT, and managed-session fixtures exercise valid requests and initialized lifecycle contracts. Downlevel crypto tests preserve real credential and key-ownership assertions without enabling unsupported raw-ECDH policies or adding skips. Fresh local evidence after integration includes: | Scope | Target | Passed | Skipped | |---|---|---:|---:| | Client lifecycle / channel ownership / builder fixtures | net10.0 and net48, each | 96 / 103 / 123 | 0 | | Combined server lifecycle, events, aggregates, crypto, and contracts | net48 | 358 | 0 | | Full lifecycle plus certificate-alarm and aggregate fixtures | net10.0 | 116 | 0 | | Final server-contract and history-routing delta | net10.0 and net48, each | 84 | 0 | | Subscription / XRegistry / WoT event regressions | net10.0 | 7 / 2 / 3 | 0 | | Full Sessions project | net10.0 | 780 | 379 | | Full ComplexTypes project / downlevel resolver fixtures | net10.0 / net48 | 2854 / 15 | 0 | | Full WoT project / downlevel structured-write fixtures | net10.0 / net48 | 1496 / 27 | 0 | | TLS domain-name regressions | net10.0 and net48, each | 21 | 0 | All listed runs exited 0. The Sessions skips come from existing endpoint and policy capability guards; they are not counted as passes. No skip was added. Worker validation also covered full DI (426 passes), full History (540 passes, 21 existing skips), 38 exact downlevel event/history failures, and 60 repeated certificate-rotation race cases. The final crypto fixtures passed 73 cases on each target with the unchanged leak detector; a temporary premature-disposal mutation made all three borrower tests fail and was then removed. All 29 C# files in this follow-up pass included-file formatting at info severity across 12 projects. The complete PR interface audit now covers 54 interfaces and 271 members with zero missing contracts or line-width findings. No full-solution or NativeAOT matrix is claimed. New-head CI has started and remains authoritative for the remote result. ## Test-result gate follow-up at `4b6e1203a` Azure build 18401 reported the net48 Client job as successful despite a test-host crash after only 264 passing tests. Its old evaluator counted per-test failures but ignored the failed run verdict. This was a partial run, not a benign exit after the suite had completed. The shared result evaluator now rejects aborted, errored, incomplete, malformed, or inconsistent TRX reports. Each file must describe a completed run, so a passing file cannot mask another file's failure. It retains support for completed runs followed by a benign nonzero host exit, existing skipped-result conventions, and no-TRX MTP jobs. All 78 regression cases pass after integration using Windows PowerShell 5.1. Real completed Sessions and Client reports also pass. The process-test fixture follows the existing NET10_0-only tools-test pattern; its net48 build is not counted as a test run. Formatting passes for the added test file. The Client host crash itself has not reproduced locally. The isolated fixture passed 59 tests, and two fresh full fast-CI selections each completed with 2,392 passes and three existing skips, including a run with crash collection enabled. The CI merge tree is identical to the tested source tree. No speculative runtime change was made, and the original partial CI run is not claimed as a full-suite pass. Azure build 18402 has now completed the full net48 Client run: 2,392 passed, three existing console skips, and a successful test-host exit. The corrected evaluator independently validated outcome=Completed. Across the matrix, 119 test-project jobs succeeded; Sessions net10.0 was canceled when the remote provider deprovisioned its runner, so the overall Azure pipeline was canceled. That cancellation is not claimed as a code failure or a successful run. CodeQL and three Docker image jobs were still running at the latest check. The migration discovery failure remains separate. ## Documentation follow-up at `57ed02bea` The environment blocker has been removed by the maintainer. The three bundled migration references now exactly match the canonical documents after deterministic link rewriting; all 15 bundled documents pass `validate-migration-plugin.ps1`. The canonical migration prose was not rewritten. `FileSystemClient.md` now documents that extended Windows roots preserve literal trailing-dot names, completing the filesystem review follow-up. The filesystem thread has been replied to and resolved after publication. The review pass now has 108 of 110 threads resolved. The two explanation-only threads remain open as requested; no unfinished change request is being represented as resolved. ## Cross-platform follow-up at `0d9d936a8` With migration discovery restored, the Linux and macOS test matrix exposed two stale durable-subscription expectations. The expected value 83,442 encoded the old 32-bit overflow when converting 3,600 hours to milliseconds. The existing overflow-safe server correctly returns 14,400,000 lifetime intervals at a 900 ms publishing interval. Only those two expected constants changed; production behavior, negotiated-hour checks, and all other assertions remain unchanged. The exact local lifetime selection reproduced both failures before the correction. The full durable suite now passes 36 cases with 11 existing skips on each of net10.0 and net48. All four lifetime cases executed and passed on both targets, and included-file info-severity formatting passes. ## Session shutdown follow-up at `8daf7f091` A late net48 Sessions failure exposed a shutdown race. Canceling an in-flight keepalive read can produce a transport `ServiceResultException`. The retiring worker treated its own cancellation as proof that the peer was unavailable, so `CloseAsync` or `DisposeAsync` could skip the server-side `CloseSession` request. The worker now ignores that service error only when its own token is canceled; genuine peer errors still update liveness. The full integration fixture reproduced the original error-code mismatch. Four deterministic mock-transport cases then produced three failures and one passing genuine-error control before the fix. They verify successful close, returned server error, asynchronous disposal, and unchanged behavior for a real keepalive failure. Fresh related runs pass 75 client and 101 integration cases on each of net48 and net10.0, with no skips. Ten repetitions of the formerly flaky full net48 fixture pass all 1,010 cases. All three changed files pass info-severity formatting, and temporary diagnostic instrumentation was removed. ## Atomic listener snapshot follow-up at `82dc22b5d` Ubuntu Core CI exposed an unsafe formatter rewrite in TCP listener disposal: `ConcurrentDictionary.ToArray()` had become a collection spread. A concurrent channel removal between the spread's count and copy operations could leave a default entry, causing a null dereference during disposal. The listener now uses the dictionary's atomic `Values` snapshot and disposes those channels outside the listener lock. Deterministic regressions close zero, one, or all channels at the copy boundary. Before the fix, the one/all-removal cases reproduced the exact null dereference; the unchanged-count control passed. All 23 admission/listener cases now pass on net10.0 and net48, and the full fast Core net10.0 suite passes 5,267 cases with 88 existing platform skips. Both changed files pass info-severity formatting. A bounded audit of the formatter's other snapshot rewrites found no further verified unsafe concurrent-registry copies. ## Shutdown-test observation follow-up at `58403ee8b` The net48 shutdown-order test raced its own observation: it read `m_publishWorkerTask` after starting shutdown, which can legitimately drain the worker and clear that field immediately. The test now captures the worker before shutdown starts and confirms it is initially running. It still requires the worker to finish while shutdown remains blocked by the held manager semaphore. Production behavior is unchanged. A temporary scheduling perturbation reproduced the exact null-field failure. The corrected capture passed 100 perturbed iterations; both the temporary repeat and yield were then removed. The final 126 subscription/lifecycle cases pass on each of net48 and net10.0, and formatting passes. A complete local Sessions net10.0 run also passed 780 cases with 379 existing capability skips in 7m20s after the earlier keepalive correction. ## Retirement and alias-startup follow-up at `1a048ff39` The shadow-generation test now observes its documented asynchronous cleanup through the existing bounded helper. Removing the replacement does not join a background drain that already claimed the retired generation. The test still checks live-registration removal immediately and requires the old node to disappear; no timeout or production lifecycle behavior changed. All 81 lifecycle cases pass on each of net10.0 and net48. Initial alias-node materialization now retries one timed-out, read-only snapshot query before creating nodes for that root. The retry is logged through source-generated logging. Each query retains the original shared 100 ms deadline; repeated timeouts, other errors, and cancellation still abort startup. Client searches and live refresh do not gain this immediate retry. Fault-injection tests cover success after one timeout, a persistent timeout, a different store failure, and cancellation. All 187 related alias/hosting cases and the original certificate-rotation integration case pass on each target; the positive test records exactly one retry warning. The alias documentation now accurately describes the shared request budget. All changed C# files pass formatter checks, and the complete 54-interface/271-member documentation audit passes. Fresh CI is running on `1a048ff39`; the previous completed matrix exposed only the two failures corrected in this batch and their dependent summaries. ## Sample endpoint allocation follow-up at `d08a94925` The strong-cluster test harness allocated OPC UA and Raft endpoints in separate released-port batches. Uniqueness was enforced only inside each batch, so the same OS-assigned port could appear in both protocol groups. The harness now requests one distinct batch for both groups and splits it before launching any replicas. Deterministic one- and three-replica allocation cases reproduced overlapping groups with the old plan and pass with the corrected plan. The complete 17-case short-haul sample suite passes without skips; all failover, historian-continuation, and service assertions remain unchanged. Both changed files pass info-severity formatting. This prevents intra-cluster self-collisions but does not claim to reserve released ports against unrelated external processes. ## Code-review follow-up at `085fd9636` A review of the complete branch diff found five defects this PR introduced. All are now fixed, each in its own commit. `RelatedTo`'s recursive-to-iterative rewrite defaulted the optional `includeTypeDefinitionSubtypes` and `includeReferenceTypeSubtypes` operands to `false`. Part 4 §7.7.4 specifies both default to `true`, so a filter that omitted them silently stopped matching subtypes. Dynamically created key-credential nodes derived their namespace from the containing folder, which is the standard `i=18155` node in namespace 0 — the namespace reserved for the OPC UA standard address space; they now resolve the server-owned namespace and fail with `BadInternalError` rather than guessing index 1. The retained audience-less `CreateTokenData` overload produced tokens that verification always rejects, so it is now `[Obsolete]` and throws instead. A failed reference to a remote parent left the new node registered with a one-sided inverse reference, and is now rolled back. An existing `.pfx` is restricted before it is rewritten, rather than after its new key bytes are on disk. One further reported finding was rejected after investigation. `JwksIssuerKeyResolver` deliberately does not dispose retired key snapshots: `RetiredKeysAreCollectibleWhileResolverRemainsAliveAsync` proves the resolver retains no retired snapshot, and `ReturnedKeysSurviveRepeatedRefreshAndResolverDisposalAsync` requires already-returned keys to keep verifying across refreshes and resolver disposal. Adding disposal would have broken that tested contract, so the exploratory change was reverted. Validated on net10.0 and net48: 256 Core and 633 Server cases pass, with one pre-existing net48 skip. The build reports zero compiler and analyzer diagnostics, all eight included-file info-format checks pass, the contract audit covers 58 interfaces and 310 members with no findings, and the 15 bundled migration documents validate. All 122 review threads are resolved; the key-credential namespace thread was reopened to retract an earlier incorrect answer and then resolved against the real fix. ## Review-body follow-up at `da0d59cfb` The re-review at `8daf7f091 + 82dc22b5d` listed four items in its summary that had no inline thread of their own, so they had not been picked up. All four are now fixed. Both event-dispatch permission gates had been tightened from not-Bad to `IsGood`, which silently dropped events whose permission verdict is Uncertain; the data-change path in the same file still treated Uncertain as deliverable, so the two had diverged. `EventSourceRegistry` only cleared `ConsecutiveFailures` when a source was deactivated, so a source that had backed off to the 30-second cap kept that delay for the rest of the process even after starting successfully. `UserNameIdentityTokenHandler` built a temporary issuer chain whose `Add` calls take independent certificate references, and never released them. The fourth was the receiver-side sequence rollover, which the reviewer had correctly re-flagged as still open despite its thread being resolved. `m_sequenceRollover` was set permanently, so the second legal wrap on a long-lived channel was rejected and faulted the channel along with the transport-reconnect OPN. OPC 10000-6 does not cap a SecureChannel at one wrap. The flag is now cleared once an accepted number has traversed the normal range, which keeps rejecting a replayed low number that never left the rollover window. Validated on net10.0 and net48: 636 / 593 Core cases and 135 / 134 Server cases pass, including the new `UaSCBinaryChannelSequenceRolloverTests` and the Uncertain-permission delivery cases. The build reports zero compiler and analyzer diagnostics and the changed files pass included-file info-format checks on both targets. The previous head `085fd9636` was fully green: 279 checks passed and Azure build 18414 succeeded with 137 of 137 jobs, after the platform automatically retried a job whose NuGet tool download had hit a transient TLS error. ## Reported issues #4508 and #4509 at `6ad1ecf16` **#4508 (V2 subscription recreate deadlocks against a faulted transport) was not yet fixed and is now closed by `bac260a06`.** Both drain sites the report identifies were still unbounded. A publish worker that started its request before the quiesce parks inside the service call on the channel ready gate while holding an active publish request; the recreate that would make the channel ready is the very operation awaiting the drain, so the wait never ends. The drain now cancels in-flight attempts through a per-attempt token linked to the worker token. An aborted worker rolls its acknowledgements back, releases the request and returns to the paused park instead of terminating, so it resumes when the caller leaves the quiesce. Publish ingress stays quiesced for the caller's operation, so `DropPendingForSubscription` keeps the guarantee the report asks to preserve and no blind timeout is added. The new regression parks a worker on a cancellable gate that never completes on its own: it reproduces the hang for the full 30-second budget before the change and passes after it. **#4509 (identity provider fails the initial connect) was already fixed for its primary symptom.** `HandleConnectAsync` materializes the provider's identity through `CreateIdentitySelectionContext` before the first `CreateAsync`, so Anonymous is no longer substituted against a UserName-only endpoint. `6ad1ecf16` adds the two remaining details from the report: the enabled-policy set now includes the negotiated channel policy, so a client cannot reject the policy it already accepted as `NotEnabledByClient`; and when discovery has not populated the endpoint's token policies the connect keeps the configured identity so the attempt fails at the transport layer for the reconnect policy to retry, instead of failing at the identity layer. Validated on net10.0 and net48: 477 / 473 client session and subscription cases pass, the build is free of compiler and analyzer diagnostics, and the changed files pass included-file info-format checks on both targets. The full `Opc.Ua.Sessions.Tests` suite also passes locally on net10.0 with 782 passed and 379 pre-existing capability skips. GitHub checks are green on this head: Build and Test .NET 10.0, Docker Sample Images CI, and NuGet Publish all succeeded. Azure build 18417 completed 134 of its 135 jobs successfully; its net10.0 Sessions job was cancelled by the hosted-agent provider ("Received request to deprovision"), the same infrastructure flake that hit build 18409 earlier on a head predating these changes. That job is not claimed as passing, and the local full-suite run above covers the same project. The previous head `da0d59cfb` completed Azure build 18415 with every job succeeded. ## Review follow-up at `a08f0c12b` Eleven new review threads arrived, nearly all documentation. Before acting on each "this is new in 2.0" remark I checked the API against `master378` rather than assuming, because a genuine 1.5 API still needs its migration entry. `ManagedSession`'s server-redundancy refresh had two hard-coded two-second bounds. The new `ServerRedundancyOptions` exposes `RefreshTimeout` for the metadata read and `PeerDiscoveryTimeout` for each peer lookup, defaults both to the previous two seconds, validates that a bound is positive or `Timeout.InfiniteTimeSpan`, and flows through `ManagedSessionOptions`, `ManagedSession.CreateAsync`, the fluent builder, and `DefaultServerRedundancyHandler`. `AsyncCustomNodeManager` and `KeyCredentialBridgeAuthenticator` are both absent from `master378`, so their obsolete members had no compatibility constraint and are removed rather than carried: `AsyncCustomNodeManager.ReadInitialValue`, the audience-less `CreateTokenData` that only threw, and the audience-less `CreateProof` that produced a proof no server accepts. `CustomNodeManager2.ReadInitialValue` and the `MonitoredNode2` migration section are genuine 1.5 APIs and are untouched. The documentation now states master's behaviour instead of the delta from 1.5.378, with each moved item already covered under `docs/migrate/2.0.x/`. `IHistorianAnnotationProvider` is described by its annotation-time key rather than as "legacy" — it is new in 2.0, so the label implied a compatibility constraint that does not exist. The KeyCredential bridge payload's `"version"` field is explained as a vendor-extension format version with no OPC UA counterpart, and its version-1 upgrade narrative is gone. `CertificateManager.md`'s migration walkthrough is replaced by the resolver API it targets. `NodeManagers.md`, `Sessions.md`, `AsyncServerSupport.md`, `Certificates.md`, and `Profiles.md` no longer announce features relative to 1.5. `Benchmarks.md`, `WhatsNewIn2.0.md`, `DeveloperGuide.md`, and `docs/migrate/` keep their 1.5.378 references, which are their subject. CI then exposed a defect this batch introduced: five fixtures resolve `ManagedSession`'s private constructor by its exact positional parameter types, so the added parameter compiled cleanly but made `GetConstructor` return `null` at run time. `7df1d5c40` updates every site; `Redundancy.Client` passes 126 of 126 and the affected client fixtures 112 of 112. The BouncyCastle question is answered and tracked in #4510: `Opc.Ua.Core` already project-references `Opc.Ua.Security.Certificates`, which already carries the conditional BouncyCastle reference, so the raw-ECDH polyfill belongs there rather than as a new Core dependency. The `IUserDatabase` metadata question is addressed to another maintainer and is deliberately left open. ## Reported issue #4509 follow-up at `5d4d13d63` The reporter verified `6ad1ecf16` and found one case still failing, correctly. The empty-token-policies branch kept the configured identity so a server that is down surfaces a transport failure rather than an identity error. A provider-only configuration has no configured identity, so it kept `null`: `OpenCoreAsync` turned that into Anonymous and `OpenValidateIdentity` rejected it with `BadIdentityTokenInvalid`, silently ignoring the configured provider. The branch now requires a configured identity to defer to. Without one the provider is consulted, so its own `BadIdentityTokenRejected` names the offered and rejected policy set instead. Two regression tests cover both configurations; the first fails against the previous behaviour by reaching the session factory with a `null` identity, which is the exact step that produced the reported error. That branch had shipped without a test, which is why the case was missed. ## Review and CI status at `5d4d13d63` **All actionable review threads are resolved: 132 of 133.** The single open thread is a question the reviewer addressed to another maintainer about moving user metadata into `IUserDatabase`; it is left open for them rather than resolved silently. Every resolved thread carries a reply naming its fix commit. **Latest-head CI is green on `5d4d13d63`: 279 checks passed, zero failed, zero pending**, with one conditional signed-package publishing job skipped. Local validation for this batch: the full `Opc.Ua.Client.Tests` suite passes 2,430 of 2,430 on net10.0, `Opc.Ua.Redundancy.Client.Tests` 126 of 126, and `Opc.Ua.Server.Tests` 590 of 590 for the affected selections. Both net10.0 and net48 build clean for `Opc.Ua.Client`, `Opc.Ua.Server`, and the changed test projects, and all changed files pass included-file info-severity formatting on both targets. The PR remains open; no merge was performed. As stated at the top, this does not claim that every item in the 244-finding audit backlog is complete. ## Latest CI follow-up at `b6f2dfa43` Azure build 18442 exposed a net48 compile regression in the Kafka adapter: `RuntimeHelpers.GetUninitializedObject` is unavailable on .NET Framework. Commit `2cf1e0eed` now uses normal `ProducerMessage` construction on `NETFRAMEWORK` while retaining reflection-based construction for modern targets that can load a different Dekaf runtime asset. The exact net48 CI selection passes 92 of 92 tests, and the netstandard2.1 adapter guard selection passes 11 of 11. After merging the latest `master`, GitHub Actions run 35643592139 is green. The initial Ubuntu Core.Schema job built successfully and passed 160 of 160 tests, then hit an external 403 while finalizing its test-result artifact; its failed-job rerun completed successfully. Azure build 18451 was canceled when its remote provider deprovisioned the net10.0 Sessions runner (`Received request to deprovision: The request was cancelled by the remote provider`). Azure attached no test task log or source error, and the canceled parent left that child check stale as in-progress. No source workaround, test skip, or check relaxation was made for either infrastructure failure. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 68f26810-22b8-476f-abcd-0a8c82d6e208	2026-09-22 09:10:58 +02:00
Marc Schier	fa8d45f2cf	Fix server/core validation, lifecycle and protocol regressions (#4477) ... # Description **Server/core audit fixes with regression tests. Latest review-fix validation, merge validation and earlier acceptance results are distinguished below.** This addresses a 95-finding server/core report. Every finding was reviewed with the OPC UA specification knowledge base or, where the standard does not prescribe a C# implementation, the corresponding ownership/configuration contract. Incorrect or withdrawn subclaims remain qualified rather than being presented as additional fixes. The original checkpoint covers session identity/certificate validation and revocation; certificate/key ownership and transactional updates; TCP reconnect, receive/admission and buffer lifetime; HTTP quotas; subscription admission, durability and pooled payloads; file-operation lifecycle; historian aggregates; fluent/state-machine behavior; and related utilities. It includes targeted regressions and directly related documentation. The approved acceptance cleanup is separate in the commit history: | Cleanup | Verified result | | --- | --- | | Invalid identity-policy and KeyCredential fixture inputs | Fixtures explicitly advertise Username and use its generated policy ID. Credential persistence uses valid clear mode inside the existing encrypted admin context. Original permission, lockout and negative encryption assertions remain. | | Native GDS lifetime and concurrent connection failures | Retain ApplicationInstance until client teardown. A deterministic native reproducer proved the test-only channel cap of 10 was exhausted; removing that override restores the existing bounded default of 1000. No global serialization or production quota change. | | Stress certificate ownership and close accounting | Balance two helper references and the fake transport's server-certificate ownership. Replace the invalid event-count bound with exactly-once physical disposal, opens = closes, zero active entries and one logical entry lifetime. | | Participant deadlines | Use the injected TimeProvider with the existing cross-framework WaitAsync overload. Tests pin one tick before, exact expiry, terminal notification, recovery and timely completion. | | Reproducibility and platform assertions | Preserve canonical WoT bytes/hashes, explicit display-culture contracts and exact numeric-vector assertions. Accept Apple's CryptographicException subtype without weakening disposal balance. | | Missing user-signature proof | Reject null/empty proofs before OS crypto. Return BadUserSignatureInvalid per Part 4, 5.7.3.3. None-policy and valid-signature controls remain. A CI-only test nullable-context error was corrected without changing production behavior. | | Durable sample restore and shared test storage | Dequeue waits for actual batch residency instead of treating failed restore completion as success, and restored files close before deletion. Five deterministic regressions failed before the fix. The two fixtures that clear the shared batch directory are isolated; all original 3,000-item assertions remain unchanged. | ## Latest review follow-up Commit `828856850219518970e8e2f580b8f94b3c1fc748` fixes the deferred robotics disposal reported in the latest review. `RobotIntentNodeManager.DisposeAsync` now joins a shared controller-host drain and then explicitly awaits base node-manager disposal. A controller's bounded shutdown wait may defer its cleanup, but no longer lets the node-manager override finish early. Concurrent callers, including an asynchronous call after synchronous `Dispose`, cannot bypass the drain after the host list has been detached. Synchronous disposal remains nonblocking for deferred work. Deferred initialization failures are logged and retained, and base cleanup failures propagate to asynchronous callers. The existing controller-level bounded disposal contract is unchanged; the node-manager contract is documented in `docs/Robotics.md`. | Regression requirement | Evidence | | --- | --- | | Wait for deferred hosts; preserve synchronous compatibility and concurrent joins | `NodeManagerAsyncDisposalWaitsForDeferredHostsAsync`: four cases covering both entry-point orders and zero/positive host shutdown waits. All four failed before the fix. | | Wait through base cleanup and observe failures | `NodeManagerDisposalWaitsForBaseCleanupAndReportsItsFailureAsync`: four cases hold the actual base-resource semaphore, verify pending callers after the host finishes, then check success or the same propagated exception and exactly-once cleanup. | The focused `IntentHostingCoverageTests` and `IntentControllerHostTests.Dispose` selection passed **30/30 on net10.0 and 30/30 on net48**, with no failures or skips. The final net10 solution build passed with zero errors and only the four previously documented CA2249 warnings in unchanged fuzz-test code. No new warnings, analyzer suppressions, dependencies, or weakened assertions were added. The review thread received a commit-specific reply and was explicitly resolved. This verification is scoped to the robotics feedback; the earlier full Subscriptions-run limitation remains recorded in the merge section below. ## Documentation review follow-up (2026-09-14) Commit `f9a9686fcc5d3cfd19cbbc8c2d826e20f5c7e72f` addresses the six follow-up threads on documentation and implementation rationale. Each has an in-thread reply citing the commit and an explicit resolution. Multiline XML documentation now covers the declarations introduced or modified throughout the entire PR, including internal contracts, samples, tests, and public members of related private helpers. A syntax-aware inventory checked **2,031 declarations across all 256 PR C# paths with zero documentation gaps**. A supplementary check also covers **75 previously unchanged public members** of private helpers involved in the changed code. Token comparison across the conditional-compilation branches proves this follow-up changes **no executable C# or test assertions**. Project-file changes are rationale comments only. The implementation questions are documented at their source: | Question | Resolution | | --- | --- | | Certificate assembly friendship | Server Push configuration reuses the internal explicit-subject CSR helper with the existing key; no public crypto API was added. | | Core.Types assembly friendship | Server builders use internal transition callbacks/revision guards; Server.Tests checks the revision deterministically without creating a public compatibility contract. | | Always-single-reader notifications | One dequeuer preserves event order; optional concurrency fans out within one event and joins before the next event. | | Asynchronous disposal completion | `DisposeAsync` already joins the completion published after admitted operations and all cleanup attempts. The compatibility `Dispose` remains nonblocking to avoid deadlocking an admitted callback against its own drain. | The requested detailed review disposition follows. It distinguishes actual fixes from confirmed policies and incorrect subclaims rather than counting every comment as a new runtime change. ### Detailed disposition of review 5191795284 The [SDK review](https://github.com/OPCFoundation/UA-.NETStandard/pull/4477#pullrequestreview-5191795284) was submitted against `1c4a9df6c`, before the subsequent merge and feedback fixes. Its **15 inline threads** have each received an action-specific reply and an explicit resolution. A fresh GraphQL query verified those replies and resolution states; the fixes in `b8a59990f` remain ancestors of the current branch. | Review concern | Action and disposition | Concrete regression evidence | | --- | --- | --- | | Injected certificate-store providers bypassed | **Fixed.** Registration, configuration snapshots, and validation use the injected providers. Explicit custom types remain authoritative; the built-in Directory catch-all is deferred so native X509 paths and later custom providers are not captured. Failed store opens dispose the created store. | `InjectedProviderResolvesRegisteredAndConfiguredTrustStores` covers default-provider ordering and both registration paths; provider validation/open-failure cases and the unchanged `TrustedCertificateInjectedViaIndependentX509StoreIsObservedAsync` cover real use and independent-store visibility. | | Unguarded timer-thread leadership callbacks | **Fixed.** Each subscriber's exception is logged independently and cannot suppress subsequent subscribers or fail lease operations. `IsLeader` reads the deadline without invoking application callbacks. | `ThrowingLeadershipSubscriberDoesNotFailAcquireOrDisposeAsync`, `ExpiryNotifiesOtherSubscribersWhenOneThrowsAsync`, and `IsLeaderDoesNotDispatchExpiryNotificationsAsync` were all demonstrated failing before the fix. | | Legacy pending-key provider accepts an unfinishable regenerated CSR | **Fixed by explicit capability validation.** A provider implementing only `IPendingCertificateKeyStore` receives `BadNotSupported` before key generation or persistence when regeneration is requested. Existing-key CSR/update remains supported. Regeneration requires matching-only consumption; no unsafe destructive probing was introduced. | `LegacyPendingProviderRejectsRegenerationBeforeCreatingOrSavingAKeyAsync` checks no key or store mutation; `LegacyPendingProviderCompletesExistingKeySigningAndUpdateAsync` proves the supported flow completes. | | Shutdown waits behind user deactivation | **Fixed.** Accepted deactivations drain before the master's lifecycle gate is taken. Configuration retains its binding until the shared drain completes, including concurrent shutdown callers and direct master disposal. | Four cases of `ShutdownDrainsDeactivationOutsideTheSessionClosingGateAsync` exercise real configuration/binding/ServerInternalData/master reentry, retained address space, exact session/subscription closure, and no production cancellation shortcut. | | Subclass cleanup runs under the operation-lifetime lock | **Fixed.** Cleanup starts outside that lock. A pre-published completion joins all disposers, and only the active asynchronous teardown context may use guarded helpers. Captured contexts lose that privilege when the callback exits. | `SynchronousOwnedCleanupLetsSamplingWorkerReachClosedAdmissionAsync`, `DisposeCoreCanUseGuardedMembersWithoutReopeningCallerAdmissionAsync`, captured-context rejection, and exact cleanup-failure/ownership assertions cover both synchronous and suspended cleanup. | | Discovery requestId-zero chunk read after pool return | **Fixed by the earlier merge.** Discovery validation precedes `SaveIntermediateChunk`; no read occurs after that path can return the buffer. The ordering is retained. | `DiscoveryChannelReadsTheFirstChunkBeforeItIsReturnedAsync` uses a poisoning pool and the requestId-zero path. | | T1.8 OPN cleanup misses post-decryption throws | **Fixed by the earlier merge and pinned with new regressions.** Both sequence rejection and certificate mismatch release the decrypted body and input ownership. | `OpenSecureChannelRejectionAfterDecryptionReturnsEveryRentalAsync` checks the exact audit status and pool conservation. Omitting either corresponding release in an isolated snapshot made its case fail; no mutation remains. | | T1.2 mount-root protection depends on the provider | **Fixed at the host boundary.** Separator-only aliases resolve to the protected root. Traversal, empty/whitespace segments, backslashes, and drive/stream qualifiers are rejected before arbitrary providers are invoked. Valid nested paths and root destinations remain supported. | A deliberately permissive provider is used by `NonCanonicalObjectPathsCannotDeleteMoveOrCopyAsync` and invalid-target cases; exact zero-call checks are paired with legitimate nested-path/root-destination controls. | | Inline trusted/issuer entries now face CRL checks | **Intentional strict behavior, documented and tested.** A configured backing store with strict unknown-status rejection requires current revocation information. Explicit-only lists without a store retain their no-store behavior. Actual revocation cannot be suppressed; a matching store entry's policy takes precedence. | `InlineIssuerWithStoreHonorsStrictUnknownRevocationPolicyAsync`, `InlineIssuerRevocationIsNeverSuppressedAsync`, store-precedence cases, and explicit-only controls preserve the missing-information versus actual-revocation distinction in Part 4 6.1.3. | | RSA minimum applied to unspecified ECC identifiers | **Fixed at the application-certificate check.** The RSA minimum is compared only with an actual RSA public key. An unspecified ECC identity is not replaced simply because its key size is below an RSA threshold. | `SilentCertificateCheckPreservesUnspecifiedEccIdentityAsync` checks DER, thumbprint, store contents, and private-key retention; explicit RSA and HTTPS minimum controls remain. | | Failed directory refresh wedges corrective mutations | **Fixed.** Recoverable automatic pre-refresh failures are logged and leave reconciliation pending, but do not block corrective provider mutations. Explicit refresh errors, capacity admission, caller cancellation, and actual provider denials remain enforced. | `CorrectiveDeleteRecoversAfterPersistentOverLimitRefreshFailureAsync` converges an externally over-limit directory back to its exact allowed contents. Capacity, cancellation/token, and six refresh-error controls check negative paths. | | Timed-transition rejection logs at 10 Hz | **Fixed.** Repeated `(state, revision, status)` warnings are deduplicated without changing the retry cadence. A different status or state entry permits another warning. | `RepeatedTimedRejectionLogsOnceAndRecoversAsync` checks one warning over eleven rejections and success on the next attempt. Status-change and same/different-state reentry controls pin reset behavior. | | Bad unsubscribe strands retired-generation bookkeeping | **Fixed.** Retired all-event bookkeeping completes even when unsubscribe reports Bad; the first Bad is still returned to the caller. | Good and BadCommunicationError cases of `RetiredAllEventsDeletionCompletesBookkeepingAndReleasesGenerationAsync` check event/snapshot removal, generation release, and exactly one unsubscribe without finalization replay. | | CSR subject parsing and fallback | **Fixed for existing and regenerated keys.** Omitted subjects fall back to the actual stored certificate. Regeneration resolves the public certificate's subject before creating a key. Malformed or unresolvable subjects return `BadInvalidArgument` before pending-key mutation. | Store-only fallback, real-generator null/empty cases, and missing-subject/malformed-DN controls verify the signed CSR, matching fresh pending key, unchanged active identity, and no destructive side effects. | | Committed RemoveUser change reported as failed | **Fixed for RemoveUser and ModifyUser.** Accepted cleanup is still awaited and close failures remain logged, but cannot replace the committed mutation result. Precommit failures retain their original result and side effects. | `CommittedUserChangeKeepsResultAndPublishedUsersWhenCloseFailsAsync` checks published Users, Good result, logging, and continued closes. `FailedUserChangeKeepsPublishedUsersAndDoesNotCloseSessionsAsync` checks BadNotFound with no publication or close. | | Alleged pooled decoded-request aliasing | **No runtime redesign needed; reviewer rebuttal confirmed.** The decoder copies the relevant input data. Misleading ownership comments were corrected rather than introducing a new dispatch model. | `DecodedRequestRetainsValuesAfterInputBuffersAreReturnedAsync` checks the exact decoded NodeId and ByteString after returned arrays are poisoned. | The current documentation-only follow-up rechecked **104 Core, 473 Server, and 4 Configuration cases** covering these concerns: **581 passed, zero failed or skipped**. The final net10 solution build also passed with **zero warnings and errors**. The complete earlier Core/Server/Configuration and net48 results remain listed separately rather than being presented as rerun current-head acceptance. ## Earlier review follow-up Commit `b8a59990fe2e8e967a12ffd5d9158beed7831143` addresses all 19 review threads. Each thread has an in-thread reply naming this commit and was explicitly resolved after verification; the final paginated query found 19 resolved and zero unresolved threads. The follow-up fixes injected certificate-store selection (including default provider ordering and native X509 paths), actual-RSA minimum enforcement, and CSR capability/subject validation before key mutation. Node-manager teardown uses simpler scoped ownership and drains accepted user revocation outside the master gate; committed user results and retired-event cleanup remain correct when cleanup reports failure. File mutations can recover after failed refresh without bypassing capacity or cancellation, provider paths protect mount roots, and repeated timed rejections no longer flood logs. Leadership subscriber failures are isolated without callbacks from `IsLeader`. Regressions also pin the already-merged OPN/discovery buffer fixes and prove decoded request values do not borrow returned input buffers. The strict inline issuer revocation policy is documented and tested, not weakened. Existing tests were changed only for the reviewed behavior: the incorrect committed-user result was corrected, and inline-issuer/root-alias controls were expanded. ### Review-fix validation | Suite | Scope | Framework | Passed | Existing TRX NotExecuted | | --- | --- | --- | ---: | ---: | | Core | Complete project | net10.0 | 4,970 | 88 | | Server | Complete project | net10.0 | 6,414 | 69 | | Configuration | Complete project | net10.0 | 231 | 0 | | Core | Certificate, lease and buffer compatibility slice | net48 | 153 | 0 | | Server | Reviewed lifecycle, user, file, timer and CSR compatibility slice | net48 | 692 | 0 | | Configuration | Complete project | net48 | 231 | 0 | | CSR provider regressions | Final portable-mock follow-up | net10.0 | 11 | 0 | All runs exited successfully with normal concurrency and leak detection. The Server console reports 5 skips; its TRX additionally records existing assumption/explicit cases, hence the 69-record count above. The Framework build caught two modern-only `ValueTask.CompletedTask` usages in new mock setup; only those expressions changed to the equivalent portable `default(ValueTask)`. The complete modern suites precede that test-only correction; all production files remained byte-identical, and the corrected fixture passed on both targets. The final net10 solution build succeeded with 0 errors and the same 4 CA2249 warnings in unchanged fuzz-test code. Diff checks and changed-line whitespace checks are clean; whole-file formatting still identifies 10 unchanged baseline lines, which were not reformatted outside the feedback scope. The committed 35-file tree was hash-verified against the validation inputs. This is the review-feedback verification scope, not a rerun or sign-off of the historical complete platform/native/soak acceptance campaign below. ## Latest upstream merge Merge `9d9bf679f317164c5b2b90924cd3cdc27a86d451` integrates `master` through `162fc5ebb` (#4486), including the AddNodes child-name index, shared certificate-error reporting, CTT sample-data corrections, and the accompanying regressions and documentation. The CreateSession conflict preserves this branch's certificate ownership, required certificate, application-URI, and channel-certificate checks. The validation result now retains nested errors through `ThrowIfInvalid`, allowing the upstream shared reporting helper to mask trust, policy, and revocation failures consistently without losing audit detail. The new indexed AddNodes regression initially attempted to reuse a deterministic NodeId after renaming its existing node. Renaming frees the BrowseName, not that NodeId. `IndexedBrowseNameReusePreservesExistingNodeIdentityAsync` now proves both contracts: the derived-ID collision leaves the original node intact, then a fresh explicitly requested ID can reuse the old name while the new name remains protected against duplicates. No production identity rule was relaxed. The incoming seeded random-index test uses the existing `UnsecureRandom` wrapper with the same seed and sequence; no new analyzer suppression was added. | Local merge validation | Framework | Passed | Existing exclusions | | --- | --- | ---: | ---: | | Core, complete project | net10.0 | 5,081 | 88 | | NodeState / BaseInstanceState | net10.0 | 579 | 0 | | Server node management, certificate and session-security selection | net10.0 | 112 | 0 | | InformationModel node-management services | net10.0 | 29 | 1 | | NodeState / BaseInstanceState | net48 | 578 | 0 | | Core certificate validation, error reporting and TCP buffers | net48 | 111 | 0 | | Server node management, certificate and session-security selection | net48 | 112 | 0 | All selected runs exited successfully at normal concurrency: **6,602 passing test executions**. Modified test assemblies were explicitly rebuilt, and the combined name/identity regression was verified by name in both net10 and net48 results. No skips or weakened assertions were introduced. The final `dotnet build UA.slnx -c Release --no-restore -m:1` with `CustomTestTarget=net10.0` succeeded with **zero warnings and zero errors**. The resolved source and adjusted tests pass whitespace verification, and their source hashes match the validation inputs. This is merge-specific verification. Earlier review results and the previously reported incomplete full Subscriptions runs below remain scoped to their own commits; they were not reopened or relabeled as passing by this operation. ## Previous upstream merge (2026-09-15 morning) Merge `c4694e20ab089c555af233642042133ff3a03ac8` integrates `master` through `484d6c887`, retaining #4481's shared Like parser/GDS query fixes, #4488's RequestHandle recovery in ServiceFaults, and #4487's expired-session and durable-transfer corrections. Three conflict resolutions preserve both sides: - Alias searches now use the shared `LikePattern` implementation, including upstream malformed-list validation. A timeout overload retains this branch's 100 ms per-alias deadline and `BadTimeout` reporting without keeping a second wildcard translator. The shared matcher's original unlimited overload remains unchanged for existing GDS/ContentFilter callers. New regressions cover bounded prefix/list scans, reuse after timeout, and the alias service result. - Expired activation closes outside the session-manager gate using upstream's once-only timeout claim, audit, and diagnostic accounting. This branch's original-channel and security-policy checks remain in place. - TCP buffer tests retain this branch's ownership, poisoning-pool and post-decryption checks alongside the upstream RequestHandle/fault overload tests; neither set was discarded. The upstream HTTPS binary behavior is intentionally retained: a decoder `ServiceResultException` produces HTTP 200 with an OPC UA ServiceFault carrying the decoder status, response timestamp, and recoverable RequestHandle, rather than the previous HTTP 500 text response. Other exceptions retain their existing HTTP error handling. | Local validation | Framework | Passed | TRX NotExecuted | | --- | --- | ---: | ---: | | Core, complete project | net10.0 | 5,054 | 88 | | Sessions, complete project | net10.0 | 780 | 610 | | Server aliases, expiry/security and subscriptions | net10.0 | 288 | 0 | | GDS database, paging and live directory calls | net10.0 | 263 | 0 | | Shared Like patterns and bounded evaluation | net10.0 | 109 | 0 | | Subscriptions transfer/durability/service selection | net10.0 | 23 | 1 | | HTTPS WebApi, complete project | net10.0 | 346 | 0 | | InformationModel aliases | net10.0 | 54 | 5 | | Shared Like patterns and bounded evaluation | net48 | 109 | 0 | | Core fault handles, TCP/HTTPS and filters | net48 | 268 | 0 | | Server aliases, expiry/security and subscriptions | net48 | 288 | 0 | These selected runs exited successfully with normal test concurrency: **7,582 passing test executions**. Sessions' console reports 379 skips; the TRX also contains conditional/assumption exclusions, so the table uses the actual 610 NotExecuted records. No skips or weakened assertions were added. The new `EvaluationTimeoutBoundsWorkAndPreservesPatternReuse` and `SharedPatternTimeoutRemainsAnAliasServiceError` tests passed on both targets. **Validation limitation:** two unfiltered Subscriptions runs did not produce a final result and were stopped, including a retry with a hang guard. They are not counted as passing. The isolated failover fixture passed 2/2, and the transfer/durability/service selection above passed. The stall's cause was not established; no unrelated code or test was changed to conceal it. The final `dotnet build UA.slnx -c Release --no-restore -m:1` with `CustomTestTarget=net10.0` succeeded with **0 warnings and 0 errors**. Whitespace verification passed for all hand-reconciled files, and staged source hashes match the validation inputs. These are merge-specific checks, not a new full platform/native/soak acceptance sign-off. Earlier review and acceptance evidence below remains dated to its own commit. ## Previous upstream merge (2026-09-14) Merge `c3e09553e4d1509502d4ba751960d58491bea2cf` integrates `master` through `6313e38a0` (#4478), including the CTT-driven Part 13 aggregate corrections and FindAlias argument validation. The upstream tests and CTT documentation are retained. The single conflict in `AliasNameWildcardMatcher` is reconciled through the branch's shared regex compiler: upstream malformed-pattern rejection and `IsValidPattern` coexist with OPC UA character escaping, whole-string/newline matching, the 100 ms timeout, and service-level error reporting. The upstream ReferenceTypeFilter checks and chronological aggregate behavior are preserved. Local merge verification: | Suite / selection | Framework | Passed | Existing skips | | --- | --- | ---: | ---: | | Server aliases, aggregates and historian | net10.0 | 1,011 | 0 | | Server aliases, aggregates and historian | net48 | 1,011 | 0 | | InformationModel aliases | net10.0 | 54 | 5 | | Features aliases | net10.0 | 11 | 0 | | Client aliases | net10.0 | 28 | 0 | | History aggregate/historical-access consumers | net10.0 | 265 | 0 | All selected tests passed at normal concurrency. The final net10 solution build passed with 0 errors and 0 warnings. The resolved file's whitespace check and the staged diff check passed. These are merge-specific checks, not a new full platform/native/soak acceptance claim. ## Previous upstream merges Integrates `master` through `8e874d073`, including the Client, Types, Core and source-generator audit fixes in #4471, #4473, #4474 and #4475, plus the event queue-size revision from #4480. The merge commits are `150ea0439` (26 conflict resolutions) and `a0e17c07c` (the base update that arrived during validation). The overlapping fixes are reconciled rather than replacing either branch: - **Rejected-certificate retention follows this branch, as explicitly requested:** zero means unlimited history; negative values disable new storage while preserving existing backend trimming behavior (Directory clears prior history; shared key/value leaves it intact). The processor and manager policy are not redefined, and documentation/tests describe the distinction. - Preserve owned certificate snapshots and borrowed validation-core lifetimes alongside upstream cache invalidation, store-first CRL checks and `BadCertificateRevocationUnknown` for unsupported revocation lookup. - Combine exactly-once chunk ownership, receive-loop cancellation, stale-epoch rejection and detach-before-adoption with upstream signature-before-padding verification and secret cleanup. - Preserve pooled `HttpClient` per-request configuration together with bounded response reads and deadlines that remain active through body consumption. Regression cases exercise already-used clients and both timeout precedence cases. - Retain the binary-compatible channel-key constructor and normalize omitted profiles; preserve exact profile filtering and upstream binary-first HTTPS/WSS endpoint ordering. - Preserve monotonic lease expiry and stale-confirmation fencing while adding ordered, non-reentrant leadership notifications outside the state lock. ## Validation Local validation of the conflict-resolution merge: | Suite | Framework | Passed | Existing skips | | --- | --- | ---: | ---: | | Core | net10.0 | 4,940 | 88 | | Client | net10.0 | 2,278 | 0 | | Server | net10.0 | 6,088 | 5 | | Types | net10.0 | 10,394 | 1 | | SourceGeneration.Core | net10.0 | 3,940 | 8 | | SourceGeneration | net10.0 | 185 | 0 | | Core | net48 | 4,855 | 104 | After the subsequent four-file #4480 update, the related Server slice passed 811 tests with 5 existing skips, the real durable queue-size cases passed 6/6, and EventManager's 21 cases passed again after analyzer-only expected-array cleanup. The final `dotnet build UA.slnx -c Release` with `CustomTestTarget=net10.0` succeeded: 0 errors and 4 pre-existing CA2249 warnings in unchanged fuzz-test code. Whitespace verification passed for the resolved files and the follow-up. Merge-specific proof includes `RequestTimeoutRemainsActiveWhileReadingTheOpenApiBodyAsync` on already-used shared clients with either the request or HttpClient timeout shorter, the existing ownership/expiry regressions from both branches, and both branches' retention tests adjusted only to the explicitly chosen zero/negative contract. Earlier acceptance at `1c4a9df6c` passed hosted Linux/macOS CI, CodeQL, image builds and the canonical coverage gate (87.15% line, 77.27% branch, 92.14% patch). Both Framework project matrices, all three Windows native suites (183 cases), and the unfiltered net10 stress project (230 cases, including full 60-minute chaos and 30-minute memory soaks) also passed. Those are **pre-merge results**, not a claim that the full framework/platform/native/soak matrix has been rerun on this merge. The previous acceptance workflow remains separate from this review-feedback operation. Security checks, meaningful assertions, leak detection, default native concurrency, full soak durations and coverage thresholds remain intact. The user-set ready-for-review state is unchanged. No architectural or complete merged-head acceptance sign-off is claimed. ## Related Issues - Fixes #4476 ## Checklist - [ ] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [x] I have addressed **all** PR feedback received.	2026-09-16 04:42:09 +00:00
romanett	93559d06d3	Fix sample A&C refresh and alarm timing found by slow CTT Alarms and Conditions runs (#4482) ... ## Why the CTT *Alarms and Conditions* group was so slow I measured every A&C CU with a fresh `ConsoleReferenceServer --ctt` (CTT 1.05.06, scripts 1.05.513), read the per-test `ResultNode` timestamps, and added `addLog` timing/counter instrumentation to a copy of the CTT project. | Cause | Effect | | --- | --- | | **CertificateExpiration** opens a modal dialog in `initialize.js` ("adjust the clock on the server"), and it also appears in `--hidden` runs | The CTT never exits. This is why the whole group "did not finish in 40 minutes". | | **Limit/Level CUs:** `initialize.js` idles the CU session for one Alarm Cycle Time (60 s) during the initial capture. `RequestedSessionTimeout` is also 60 s. | The server correctly closes the session. `LimitHelper` then gets `BadSessionIdInvalid` for its 5 filter subscriptions, and Test_003–006 each run 180 s, about 14 min per CU. | | Alarm `Test_002` never gives the AcknowledgeableCondition type a result | Always runs 3 × cycle (180 s). | | Enable `Test_003` needs every alarm type to go active within cycle/10 | Timed out in 6 of 7 runs, because boolean and analog alarms changed state on different ticks. | | Enable `Err_004` answers each event with Disable/Disable/Enable | Feedback burst, after which the CTT alarm thread sometimes returns no events. Details below. | | Comment `Test_001`–`004` compare against `CallHelper.ServerTimeOfCall`, which the CTT never sets (`0001-01-01`) | Every comment event counts as unrelated, and the tests skip after 3 retries. The server's events carry the expected comment. | Measured CU by CU, the group took **about 87 min plus the hang**. With the fixes below, running the whole group in one CTT process without CertificateExpiration takes **18:45** at Alarm Cycle Time 30. The per-CU table is in `plans/ctt-testing.md` §6. ## Server changes - **Refresh one subscription per request, not one per Call** (`AlarmNodeManager.CallAsync`). The sample answered every ConditionRefresh/ConditionRefresh2 after the first one in a Call with `Bad_RefreshInProgress`, even for other subscriptions, and never forwarded them. So CTT Refresh `Err_004` (10 subscriptions per Call) only ever refreshed one of them. The check is now keyed by SubscriptionId and MonitoredItemId. - Regression tests: `AlarmsAndConditionsRefreshTests.ConditionRefresh[2]OfDifferentSubscriptionsInOneCallSucceedsAsync`. Both fail without the fix. - **Boolean alarm source now uses the analog source's steps and limits** (`AlarmController`, `ConditionTypeHolder.GetSeverity`). OffNormal, Discrete and SystemOffNormal alarms now change state on the same tick as the limit alarms (5 per second, 70/90/30/10), and the shortest state still lasts 4 s. - With this, Enable `Test_003` passed in 4 s instead of a timeout. Confirm `Test_001` for the boolean types also stopped failing in both group runs. - Test: `AlarmControllerTests.BooleanAndAnalogSourcesChangeStateOnTheSameStep` (fails without the change). - **Alarm controllers step on shared interval boundaries** (`AlarmController.SetNextInterval`). Scheduling relative to the last step let the two controllers drift up to one 100 ms simulation tick apart, so the boolean events sometimes landed in a later publish and Enable `Test_003` still timed out in 3 of 5 runs. With shared boundaries it passed in 6 of 6 runs. - Test: `AlarmControllerTests.ControllersScheduleTheirStepsOnSharedIntervalBoundaries`. I did not make the simulation faster. Acknowledge, Confirm and Comment tests call methods with the EventId of the event they just received, and a shorter state would make them race the next transition. ## Not reproduced / not a server defect - **Refresh `Err_004` `BadSubscriptionIdInvalid` cascade.** In the original run the alarm-thread session's subscriptions (15.5 s lifetime) were gone after the script's 30 s wait. Nine further CTT runs passed all 28 Refresh/Refresh2 cases. An in-process replay with a sequential publisher kept every subscription; that replay is what exposed the refresh defect above. - **Enable event stall (C43) is inside the CTT.** A server build that logs every returned notification message showed that during a stall the server sent 435 and 420 events to the two CTT event items in 173 messages, and the CTT acknowledged all of them, while its alarm-thread buffers returned nothing. It only happens after `Err_004`'s Disable/Enable feedback burst, in 8 of 28 runs. ## Docs - `plans/ctt-testing.md`: new §6 *Alarms and Conditions*, covering the recommended run, where the time goes, how to instrument a run and the expected result. Also a note that a hidden CTT run can block on dialogs, so always use a timeout. - `plans/ctt-issues.md`: the A&C "open server findings" are replaced with these results, and there are new CTT script defects C39–C44 plus configuration notes (Shelving chattering alarms, Alarm Cycle Time vs session timeout). ## Tests - `Opc.Ua.History.Tests` A&C + AlarmClient: 155 passed. - `Opc.Ua.Server.Tests` `AlarmControllerTests` / `QuickstartsServerUtilitiesTests`: 4 passed. - CTT whole-group runs (27 CUs, 128 cases): 18:45 at cycle 30 and 29:23 at cycle 60 on this branch; 23:43 and 24:21 with only the refresh fix. The spread comes from the Enable stall (C43). 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5 <noreply@anthropic.com> Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: romanett <7413710+romanett@users.noreply.github.com>	2026-09-15 14:44:36 +00:00
romanett	162fc5ebb3	Fix AddNodes scaling and OpenSecureChannel revocation errors found by CTT Monitored Item, Node Management and security runs (#4486) ... # Description Findings from running the CTT conformance groups **Monitored Item Services**, **Node Management Services**, **Security General** and **Security User Token** against `ConsoleReferenceServer --ctt` (CTT 1.05.06, scripts 1.05.513). The security groups ran **without `-a`**, against an isolated server PKI built from the CTT's `copyToServer` folders, so the negative certificate tests are meaningful. ## Server fixes ### AddNodes below one parent was quadratic (Node Management Delete Node `Err-002.js`) The CTT adds 15,000 variables below `ns=2;s=CTT` in batches of 5,000 and warned that AddNodes responses took 400–800 ms. For every added node the server searched all children of the parent twice: once in the BrowseName duplicate check in `AsyncCustomNodeManager.AddNodeCoreAsync`, which also copied the children list, and once in the NodeVersion lookup of `FilterChangesByNodeVersion`. - `NodeState.FindChild` now searches children lists with ≥ 64 entries through a BrowseName index kept in a `ConditionalWeakTable`, so nodes with few children get no extra field. - It keeps first-match semantics and is maintained by `AddChild`/`RemoveChild`. - It is dropped on replacement and invalidated when a child is renamed or moves to another parent. - Lists whose children point at another parent (clones) are still searched linearly. - The duplicate check uses `FindChild` instead of copying the list. | 5,000-node AddNodes batch (in-process, Debug) | 1st | 2nd | 3rd | | --- | --- | --- | --- | | before | 769 ms | 2,083 ms | 4,011 ms | | after | 141 ms | 166 ms | 172 ms | In the CTT, AddNodes of 5,000 items now answers in 51–72 ms and the warning is gone. ### OpenSecureChannel leaked revocation errors (Security Certificate Validation `002.js`) Part 4 §6.1.3, Table 106: - For the revocation check (`Bad_CertificateRevoked`, `Bad_CertificateIssuerRevoked`), `Bad_SecurityChecksFailed` **shall** be reported to the client. - For a missing revocation list (`Bad_CertificateRevocationUnknown`, `Bad_CertificateIssuerRevocationUnknown`), it **should** be. `TcpServerChannel` masked only `Bad_CertificateRevoked`, and `StandardServer.OnApplicationCertificateError` (CreateSession) had its own list that missed `Bad_CertificatePolicyCheckFailed`. Both now use one helper, `CertificateErrorReporting` in Opc.Ua.Core, which also inspects the nested errors of the certificate validator (both paths now throw the validation result with `ThrowIfInvalid`). Only validity period, host name, URI and usage errors keep their own code, and audit events still carry the specific result. The CTT warning is gone. ### Sample data - **Monitor Value Change V2 `020.js`** skipped because `Scalar_Static_Arrays_ByteString` had a 1-byte and a 3-byte element. The script checks every element, and the simulation only padded elements 0–2. The seed value now has no element shorter than four bytes, and the simulation pads every element. - **Monitor Value Change V2 `042.js`** got 18 of 19 notifications. The missing item is the Float matrix: its element [1,1] was `-1.03179664E+33`, where adding 1 is below Float precision, so the value really did not change. The server did not drop a notification. The element is now `-1031.79664`. ## CTT results after the fixes | Group | Result | | --- | --- | | Monitored Item Services (208) | Monitor Value Change V2 44/44. Remaining: Monitor Basic `039.js` (C17, missing include), `038.js` warning (C32), and 1–2 sporadic timestamp-tolerance warnings that move between test cases from run to run. | | Node Management Services (15) | Only Add Node `Err-008.js` (Mantis 11266). | | Security General (314) | Certificate Validation: 23 pass, 24 not implemented, 3 not-applicable skips. None CreateSession/ActivateSession: all pass. The other 50 CUs are *Not Implemented* in scripts 1.05.513. | | Security User Token (66) | Anonymous `002.js` (C35) and User Name Password 2 `015.js` (C36) fail because of CTT defects. X509: 18/18 automated cases pass. | ## CTT defects documented (`plans/ctt-issues.md`) - **C32** `038.js` compares a RevisedSamplingInterval of 0 with a project setting instead of the node's MinimumSamplingInterval or the server's MinSupportedSampleRate. - **C33** `020.js` requires every ByteString element to be ≥ 4 bytes, but its message says elements 0–2. - **C34** `RequestedNewNodeId()` always sends `ns=1`, regardless of `RequestedNodeId_Namespace`, so client NodeIds can't be enabled. - **C35** Security User Anonymous picks the `opc.wss` endpoint, which the CTT cannot open (`BadNotSupported`). - **C36** `UaEndpointDescription.FindTokenType` rewrites the cached endpoints' token policies, so `015.js` reports PolicyIds as reused. The server's GetEndpoints output was verified compliant (PolicyIds unique per configuration, Mantis 11258). - Evidence added to **C9** (042.js) and **issue 17** (015.js). `plans/ctt-testing.md` gains how to run the Monitored Item/Node Management groups and a recommended setup for the security groups: isolated PKI from `copyToServer`, no `-a`, PKI restore per part, and waiting for `Server started`. Other findings recorded there: - the Create/DeleteMonitoredItems timing warnings are jitter; - `LoginNameAccessDenied` is not a real user; - `samples\UAReferenceServer.ctt.xml` needs no change (enabling `RequestedNodeId` breaks six Add Node cases because of C34). **Note:** `plans/ctt-testing.md` and the refreshed `plans/ctt-issues.md` are introduced by #4482. The plans files here are based on #4482's versions, and new entries start at C32 because #4481 uses C19–C31. Please merge after #4482 (or rebase the plans files onto it). ## Tests - `NodeStateChildNameIndexTests` (Opc.Ua.Types.Tests): index semantics (duplicates, remove, rename, replace, re-parent, clone, shrink/grow, 2,000 random operations against a linear search). Also a scan guard: 5,000 misses against 50,000 children take 97 ms with the index and 7,083 ms with it disabled. - `AsyncCustomNodeManagerNodeManagementTests.AddNodeAsync_DuplicateBrowseNameUnderParentWithManyChildren…` - `TcpServerChannelCertificateErrorTests` (Opc.Ua.Core.Tests): masked vs reported certificate errors. - Opc.Ua.Server.Tests 5,553 passed, Opc.Ua.Core.Security.Tests 556 passed, Opc.Ua.Core.Tests (Security + Stack) 3,561 passed, InformationModel NodeManagement 26 passed (net10.0). - Opc.Ua.Types.Tests 10,404 passed and 1 failed: `WotSpecFixtureManifestTests.EveryEmbeddedExampleMatchesItsRecordedHash`. That test hashes WoT assets which are `eol=lf` in the index but CRLF in this worktree's checkout; no WoT file is touched by this PR. ## Checklist - [x] I have signed the CLA and read the CONTRIBUTING doc. - [x] I have added tests that prove my fix is effective or that my feature works. - [x] I have added all necessary documentation. - [ ] I ran all tests locally using UA.slnx against .NET Framework and .NET 10 (net10.0 suites listed above only). 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5 <noreply@anthropic.com> Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: romanett <7413710+romanett@users.noreply.github.com>	2026-09-15 10:08:30 +00:00
romanett	8e874d073b	Revise event monitored item queueSize 0/1 per Part 4 §7.21 (fixes CTT Auditing Connections) (#4480) ... ## Problem CTT **Auditing Connections** (CTT 1.05.06, scripts 1.05.513, `ConsoleReferenceServer --ctt -a`) fails nondeterministically: - `TestFindActualFromExpected - Unable to Find Entry for ClientAuditEntryId <id>` (011.js, 012.js, 007.js, 020.js, varying by run) - `TestFindActualFromExpected - Unable to Find an Entry for AuditEventType: i=2060` (and i=2069/i=2071), reported as Not Supported ## Root cause The CTT audit subscription (`library/Base/auditThread.js`) monitors `Server.EventNotifier` with the CTT's default `QueueSize = 1` and a 250 ms publishing interval. For **event** monitored items Part 4 §7.21 defines queueSize 0 as "the Server default" and 1 as "the minimum queue size the Server requires for Event Notifications". `EventManager` only clamped the maximum and `MonitoredItem.InitializeQueue` mapped only 0 to 1000, so 1 became a literal one-entry discard-oldest queue (`RevisedQueueSize = 1`). A single connect raises OpenSecureChannel, CreateSession, ActivateSession and CloseSession audit events within milliseconds, and in `--ctt` mode alarm events share the queue. Every event except the last one raised between two publishes was dropped and replaced by an `EventQueueOverflowEventType`. The audit event content itself was correct. The events that survived carried exactly the `ClientAuditEntryId` the CTT put in `RequestHeader.AuditEntryId`. ## Evidence (instrumented CTT copy logging `Test.Audit.GetBuffer()`) | Server | RevisedQueueSize | CTT buffer | Auditing group result | | --- | --- | --- | --- | | master | 1 | 16 events, **7 × i=3035 EventQueueOverflow**, 0 × OpenSecureChannel (2060), 0 × CloseSession (2069) | 18 pass, 2 Error + 1 NotSupported (007/020/001) | | this PR | 1000 | 42 events, no overflow, every expected audit type present | 21 pass, 0 errors (official project, uninstrumented) | Each gap in the master buffer is followed by an overflow event. For example, OpenSecureChannel at .553 is overwritten by CreateSession at .617, and CloseSession at 08.307 by CloseSecureChannel at 08.312. ## Fix - `EventManager.CalculateRevisedQueueSize`: requested queueSize 0 and 1 are revised to the new `EventManager.DefaultEventQueueSize` (1000), then limited by `MaxEventQueueSize`/`MaxDurableEventQueueSize`. This applies on create, modify and restore, so `RevisedQueueSize` reports the real size. - `MonitoredItem.InitializeQueue`/`RestoreQueue`: event items with queueSize ≤ 1 use the same default. Previously only 0 did; data change behaviour is unchanged. ## Tests - New `EventManagerTests`: revision of 0/1, clamping to max, modify with 1, and a behavioural test that a 3-event burst on a `QueueSize = 1` item publishes all 3. Before the fix it published 2: the last event plus the overflow event. - `Opc.Ua.Server.Tests`: 5558 passed / 0 failed (net10.0) - `Opc.Ua.Subscriptions.Tests`: 619 passed / 0 failed / 6 skipped (net10.0) - `Opc.Ua.Core.Security.Tests` (Audit filter): 88 passed / 0 failed / 3 skipped 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5 <noreply@anthropic.com>	2026-09-14 10:15:21 +02:00
Marc Schier	4633aa7a34	Harden HA address-space hydration and replica-consistent NodeIds (#4445) ... # Description Follow-up to #4390 for distributed address-space ownership, authoritative hydration, and replica-consistent wire NodeIds. Tracks #4444. Identity implementation: `a78d59067` (Server policy/lifecycle/adapter seam) and `07faf5cfd` (replica identity module, runtime wiring, examples and proofs). ## Replica identity - `UseReplicaNodeIdentity` / `ReplicaNodeIdFactory` reserve fixed shared namespace indexes before node-manager construction and reuse `DefaultNodeIdFactory`. ApplicationUri and built-in diagnostics/configuration remain local. - Replicated startup requires an explicit identity contract. Namespace layout, deterministic mode, replica-set identity and writer policy must agree. Standard factory views, replacement and registration preserve the policy. - Active/passive writer-assigned identities are replicated unchanged. Independent creation requires stable keys or explicit IDs. Live IDs and retained tombstones are reserved before writer allocation; no network/storage call runs in `New`. - Protected store descriptors use strong routing, including customized hybrid prefixes. Unknown legacy state and empty eventual scans cannot authorize automatic adoption. Verified-new hybrid provisioning is explicit. - Active/active frames compare the descriptor before CRDT merge. Rejected frames are not reported as applied; incompatible admission remains at ServiceLevel 0 through the standard service-level wiring. - Shared metadata validation covers type definitions, data types, references, permissions, NodeId/ExpandedNodeId/QualifiedName values, arrays/matrices, DataValues and encodeable structures/arguments, without reflection. - Runtime preparation hydrates retained IDs before replacement routes publish. Rebinding keeps the existing store/election or gossip transport/map and attaches to the new node-manager sources. Normal node-manager mutations, including AddNodes, reach the cached local-address-space adapter. - WoT materialization retains the stable configured factory. Samples expose genuinely factory-created nodes and a client `--identity` failover workflow. ## Preserved HA repairs The published `d99995003` and `79da74f14` fixes remain in place: - Shared linearizable sequence/lease coordination; no pretend CAS on CRDT and no private counter substituted for shared coordination. - Strict authoritative record decoding, protected pending reservations, safe snapshot publication and required delta retention. - Accepted topology state controls authoritative membership; stale deletion cannot remove a newer incarnation. - Independent subtree attachment tracking and correct disposal of the final snapshot task. - Values wait for their topology, and parent tombstone horizons prevent older descendant values crossing incarnations. A new deterministic regression also covers writer hydration preparation: temporary reconciliation removals must remain inbound application, not be recaptured as new shared deletion records. ## Validation ### Review feedback fixes `3a682155b` addresses the active-node notification, WoT namespace-index bounds, and retired-manager XML documentation feedback. The address-space adapter now notifies listeners with the registered active node, and both WoT managers reject missing/out-of-range namespace indexes before ownership is established. Targeted feedback validation passes on net10.0 and net48: 8 address-space adapter cases and 74 WoT cases per framework, plus 17 hydration/gossip/live-client integration cases on net10.0. The wrong-instance notification and missing namespace regressions were reproduced before the fixes. ### Identity implementation evidence | Selected scope | net10.0 | net48 | | --- | --- | --- | | HA repair, identity, metadata, peer admission and real-client identity/reload fixtures | 215 passed | 215 passed | | Factory, fluent authoring/import, NodeManagement and address-space adapter fixtures | 213 passed | 213 passed | | WoT node-manager fixtures | 68 passed | 68 passed | - Real UA-TCP clients compare full NodeIds/reference targets across independent servers in all four deterministic modes, with different manager/creation order and local allocations. Saved IDs work after endpoint failover and restart. - Real AddNodes-created IDs remain readable through successive live manager replacements in both replication modes, including nodes created after a reload. - Two process-level cases start three sample replicas, kill the serving process, verify a different serving ServerArray URI, and reuse cached factory-generated IDs for Read and CreateMonitoredItems without remapping or rebrowsing. - The identity/hydration scenario runs from the actual published win-x64 NativeAOT executable in the existing historian companion host. - The focused writer-recapture regression was observed failing without its fix, then passing. The real reload scenario was additionally repeated while diagnosing that race. - Changed-file formatting/style/analyzers were applied. Existing CA1508, CA1823, CA1861 and CA1850 warnings in untouched upstream files were not suppressed. The selected checks above do not replace full-solution CI, coverage gates or maintainer review, and do not claim that the entire solution or every native platform was run. #4444 remains the tracking issue. ## Contract and consistency limits Fixed identity does not make eventual payload reads linearizable. Hybrid views remain non-destructive, use explicit tombstones, and do not infer empty-store bootstrap or partition completion from absence. Compacted snapshots require authoritative storage. Failed/uncertain reservations require reconciliation. There is no automatic namespace-slot allocation, persistent logical-key mapping database, live renumbering, legacy-store wipe/adoption, or new hash algorithm. Opaque shared structures require a registered codec so their namespace-bearing fields can be validated. Application callbacks are still application-owned. ## Related issues - Tracks #4444. - Follow-up to #4390. - Builds on the merged NodeId factory (#4433), configure/seal (#4442) and lifecycle/import (#4427) integration at `aedd3f738`. ## Checklist - [ ] I have signed the CLA and read CONTRIBUTING. - [x] Added targeted regression and integration tests. - [x] Updated directly related API, HA, migration and sample documentation. - [x] Ran scoped formatting and the targeted framework checks listed above. - [ ] Full UA.slnx matrix and coverage gates completed. - [ ] All CI and maintainer review completed. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 9dbd9527-d818-47a0-984c-fbb1472d3d6b	2026-09-09 13:26:45 +02:00
Marc Schier	be61d598a9	Fix startup NodeManager lifecycle and imported method arguments (#4427) ... # Description Make startup-composed application NodeManagers participate in the live lifecycle and bind imported NodeSet2 Method argument properties to their typed `MethodState` children. This change: - adopts application NodeManagers created before startup into `INodeManagerLifecycle.Registrations` after server startup succeeds, while keeping diagnostics, configuration, and core managers protected; - retains per-manager startup external-reference ownership and exact routing positions so reload, removal, rollback, overlapping namespaces, synchronous adapters, and server restart preserve existing behavior; counted immutable reference snapshots avoid quadratic startup matching; - rejects duplicate factory output across active, unpublished, and retired lifecycle generations without deleting or disposing the live manager; callers can catch the public `NodeManagerAlreadyRegisteredException`; - binds valid namespace-zero `Argument[]` `PropertyType` `InputArguments` and `OutputArguments` Variables to `MethodState.InputArguments` and `MethodState.OutputArguments` from either `HasProperty` direction, without requiring `ParentNodeId`, including local namespace-URI reference targets; - preserves authored metadata during NodeSet typed-child promotion without changing the initialization behavior of unrelated generated nodes; - retains generic-import guards for custom and malformed signatures, duplicate standard-signature validation, and upstream factory-driven generated-slot replacement and reconciliation callbacks; - updates lifecycle and Runtime NodeSet documentation and clarifies `OnServerStartedAsync` timing for both `StartAsync` overloads, including the unopened default host returned to the caller. This is a focused follow-up to #4418. That PR preserves registrations from multiple fluent builders, but does not change lifecycle ownership or NodeSet child typing. The branch includes upstream `master` through `da7412c42`, including #4396, #4432, #4437, #4438, and #4440. The completed review fixes in `686d0561f` are included. The latest base merge (`a29fc6ca8`) combines them with #4432's shared batch/fluent importer and generated state factories. One iterative linker supports available parent nodes, deferred parent side tables, application-owned handles, and placeholder reconciliation while retaining reference-driven Method argument binding and URI handling. Upstream cancellation, GDS assembly renames, certificate leak scoping, and xRegistry changes are preserved. ## Related Issues - Fixes #4421 - Fixes #4422 ## CI regression fix `e1a4436f0` fixes the GDS failure reported on Ubuntu and macOS. Copying permission metadata in general `NodeState` initialization applied `SecurityAdmin`-only defaults to generated GDS custom certificate groups and denied their existing GDS-admin Browse requests. Metadata preservation is now confined to NodeSet typed-child promotion; imported Method argument permissions remain intact, while unrelated generated nodes retain their existing initialization behavior. Local Release validation also exposed a 260-character certificate path in the startup-failure test added by this PR. Its isolated PKI now uses a short temporary path. No assertions, authorization checks, or CI gates were weakened, and no pre-existing tests were changed. ## macOS ARM64 NativeAOT suspension Per maintainer request, `a15971f32` suspends only the failing `macos-latest` / `osx-arm64` NativeAOT matrix entry. Re-enabling it once the compiler contains the runtime fix is tracked in #4443. Intel macOS, Linux, and Windows NativeAOT coverage, managed macOS tests, and all other CI gates remain enabled. This is an explicit coverage suspension, not a claim that the underlying compiler/linker defect is fixed. The macOS ARM64 NativeAOT job on `a29fc6ca8` fails during native linking with `ld: Assertion failed: (_addend == uniqueIndex && "too many large addends")`. Both attempts of [run 34191755950](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/34191755950) hit the same assertion before the native test executable can run; the build/test summary failure is downstream. This matches the NativeAOT Mach-O relocation issue in dotnet/runtime#119380, fixed by relocation-anchor emission in dotnet/runtime#124721 and its .NET 10 backport dotnet/runtime#132171. The failing `Microsoft.DotNet.ILCompiler` 10.0.11 package's nuspec points to `dotnet/dotnet` commit `e2f47b0110ed922f21a1522da67279133ce28f32` (July 23); its object writer does not contain the anchor fix merged on August 12. Version 10.0.11 is currently the latest stable package. The base commit passed on the same runner image and SDK, so this is not being dismissed as a generally broken runner or a test flake. The precise PR-specific object-layout trigger has not been isolated. A compiler containing the relocation fix is needed before restoring the lane. No test code, assertions, coverage thresholds, or shared tooling settings were changed. ## Validation Latest base-merge validation on both `net10.0` and `net48`, Release: - Import helpers and argument-binding regressions: 51 passed per framework. - Batch/fluent import, generated-state overlays, runtime/startup lifecycle, cross-source references, routing, reference snapshots, and node-authoring selection: 344 passed per framework. - Merge-specific cases cover available Method parents with forward/inverse and URI/index references while retaining an application-owned `NodeId` handle. - The unchanged upstream `NodeSetImportIntegrationTests.cs:210` CA1861 warning remains; no diagnostic suppression or unrelated cleanup was added. Release CI-fix validation on both `net10.0` and `net48`: - `CustomCertificateGroupIntegrationTest`: 4 passed, including the unchanged CI failure. - `UANodeSetHelpersTests`: 8 passed, including imported security metadata. - `StartupRuntimeNodeSetLifecycleTests`: 5 passed. Earlier Debug merge and review validation on both frameworks: - Lifecycle, RuntimeNodeSet, fluent, and OperationContext selection after merging `978e6d1af`: 638 passed per framework. - Startup/transport-binding and RuntimeNodeSet integration selection after merging `017856f4a`: 28 passed per framework. - Public exception contract and duplicate-registration selection in `fbf08428b`: 6 passed per framework. Targeted test invocations rebuilt the affected projects successfully. The full `UA.slnx` suite was not rerun locally. ## Checklist - [ ] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [x] I have addressed **all** PR feedback received. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 2bb8a834-7695-4ae6-84cb-2471c76d1b12	2026-09-08 11:11:53 +00:00
Marc Schier	7411654c8d	Complete OPC UA Part 11 Historical Access (#4390) ... # Description Completes the OPC UA Part 11 Historical Access work requested by #4387 and the historian framework integration requested by #4400. The conformance/evidence catalog covers all 37 released UACore 1.05 Historical Access profiles: 15 Server facets and 22 Client facets, together with the standard aggregate functions and their conformance units. Server facets are advertised only when the resolved providers expose their required interfaces and capabilities. ## Server and provider support - Completes raw, modified, at-time, processed, annotation, structured, and event history. - Dispatches best-effort, bulk, and transactional updates with aligned statuses, old values, diagnostics, and rollback state. - Supports mixed history-update detail types and batched structured/annotation operations. - Uses composite identities and exclusive cursors for same-timestamp structured, modified, and event values. - Captures live data and events, installs historical configuration objects, and emits typed audit payloads. - Derives aggregate monitoring filters from per-node historian capabilities and rejects unsupported processed aggregates before provider dispatch. - Supports tri-state `Historizing`: set, clear, or preserve provider-owned state. ## Client support - Exposes modified values together with `ModificationInfo`. - Adds event-history reads and event insert/replace/update/delete operations. - Adds structured and annotation batching with strict response validation. - Shares continuation handling and release-on-abandon across read families. - Accepts inherited standard event fields rooted at event subtypes. ## Review hardening - Registers DI-selected historians before node-manager reconciliation and capability publication, while preserving provider ownership. - Uses committed Raft read barriers for linearizable `TryGetAsync` and `ScanAsync`. - Keeps claimed continuation state immutable until a fresh successor is saved, restoring the original after transient failures. - Uses exact-incarnation compare-and-delete so delayed cleanup cannot remove a restored same-ID continuation. - Cleans up indeterminate initial and replacement saves, and propagates shutdown cancellation through cleanup resolution. - Preserves legacy continuation envelopes/cursors and distinct annotation parent/property identities. - Deletes every structured entry at a requested timestamp and uses the complete modified-history ordering tuple. - Shares native/fallback at-time and AnnotationCount calculations, including reverse endpoints and cross-framework fractional intervals. - Primes modified aggregate items before buffered live delivery and deduplicates history/live overlap using provider-specific identities. - Keeps committed Modify results successful while reporting priming failures through the monitored item's notification queue. - Keeps protected-notification state live-only for queues larger than one. Queue size one retains the newest notification without pinning errors or transferring priority during resizing. Durable restore retains ordinary definitions, last values/errors, and raw queues without recreating priority. - Isolates aggregate calculation, modification preparation, and historical/live handoff in `AggregationFilterHandler`, retaining existing provider/factory wiring and supported past-start behavior. The larger-queue protection policy is unchanged pending the open review discussion. - Uses one `IMonitoringFilter` owner for protocol filters or the aggregation handler, eliminating parallel effective-filter storage and retaining the current definition during preparation. The original client filter stays distinct. - Integrates current master, retaining custom monitored-item creation decisions and per-node history callbacks. ## Redundant-server alignment and samples - Adds a protected shared historian with immutable segments, manifest CAS publication, writer fencing, and restart recovery. - Persists portable continuation state before exposing it to clients and transfers ownership during mirrored-session takeover. - Rejects eventual-consistency and active/active multi-writer historian configurations rather than silently degrading. - ReferenceServer and ConsoleReferenceClient demonstrate discovery, paging, raw/modified/at-time/processed reads, annotation/structured CRUD, event capture, and event CRUD. - RedundantServer and RedundantClient demonstrate active/passive history, continuation recovery after replica termination, and post-promotion writes. - Updates Historical Access, High Availability, profile, migration, and sample documentation. ## Compatibility - New 2.0 collection boundaries use `ArrayOf<T>` and public byte payloads use `ByteString`. - Removes the legacy public virtual `SamplingGroupManager.CreateMonitoredItem` / `ModifyMonitoredItem` entry points and protected creation factory, as agreed in review. Migration guidance points to the monitored-item manager and construction-decision APIs. - Retains established persisted formats and current write layouts. Retired interim notification-state formats (sample v2 / shared v4) are rejected, as agreed in review. - Keeps the historian integration compatible with .NET Framework and NativeAOT. ## Validation ### Latest CI source repair `73c619435` forwards the existing cancellation token at both predefined-node creation calls in the PR-added History event fixture. The merged lifecycle overload exposed these two CA2016 errors, which blocked History jobs, the solution build matrix, and CodeQL on GitHub and Azure. The exact compiler failure was reproduced locally; the repaired fixture passes 4/4 integration cases on net10.0 and 4/4 on net48 with clean scoped diagnostics. No assertions, tests, coverage thresholds, or CI configuration were weakened. The repaired History jobs on Linux/macOS and all four Azure solution builds now pass. The Windows all-TFM GitHub job instead lost its hosted runner's connection; no build log was recoverable, and GitHub recorded a runner-loss annotation rather than a compiler/test diagnostic. One unchanged retry was requested. Remaining checks are monitored with `gh pr checks --watch --fail-fast --interval 30`; CI is not yet reported as green. ### Latest base integration `bd52e5fea` merges upstream `master` at `da7412c42`. The lifecycle conflict retains upstream's shared cancellation-aware registration helper and the historian behavior. The hosted-historian fixture forwards its existing token to the new lifecycle overload. GDS project renames and all three AOT test hosts are retained, with their project references resolving after the merge. | Integrated scope | net10.0 | net48 | | --- | --- | --- | | Server lifecycle, fluent authoring/import, historian, monitored-item and hosting regressions | 732 passed | 732 passed | | NodeState lifecycle regressions | 216 passed | 216 passed | | Automatically merged Raft client fixtures | 28 passed | 28 passed | No selected tests failed or were skipped. The manually resolved files pass scoped formatting/analyzer checks. One CA1861 warning remains in the incoming `NodeSetImportIntegrationTests.cs`; that file is byte-identical to upstream master and was not rewritten or suppressed during integration. ### Latest feedback follow-up `102954eaa` replaces split filter references with the shared `IMonitoringFilter` contract implemented by protocol filters and `AggregationFilterHandler`. Targeted server regressions pass **103/103 on net10.0 and 103/103 on net48**; scoped formatting/analyzers are clean, and the updated XML-documentation inventory has zero gaps across 188 non-generated PR C# files. `93c5b5db8` renames `AggregationFilterHandler`, makes it the owner of the server-revised aggregate filter while preserving the original client filter, and removes the retired interim notification-state readers. Server regressions pass **101/101** and shared-store regressions **64/64**, on both net10.0 and net48, with no failures or skips. Runtime-file formatting/analyzers are clean. `5ccf45630` completes the public/internal XML-documentation sweep. The Roslyn inventory finds zero undocumented eligible declarations across all 186 non-generated PR C# files; the 110-file documentation slice changes only XML comments and spacing. `f17765475` applies the three requested Markdown edits. ### Earlier feedback follow-ups `a53950737` removes single-slot notification pinning and extracts aggregate implementation from MonitoredItem. Targeted sampling, aggregate modification, history/live handoff, queue/lifecycle, restore, and serialization cases pass **101/101 on net10.0 and 101/101 on net48**, without failures or skips. Scoped formatting/analyzers are clean; the focused review found no significant issues. The final formatted monitored-item fixtures also pass 45/45 on net48. The preceding `b21555568` removes the legacy sampling API bridge and durable notification-priority state. Its targeted Server cases passed 97/97 and shared subscription-store cases passed 64/64 on each framework. The broader evidence below remains pinned to its original tested commit, not attributed to these follow-ups. ### Earlier integrated-implementation validation Validated implementation commit: **`3efae597f`**. The following commit, `f6dbefb1c`, only adds two explanatory comment lines for the final standards review; it changes no executable code. | Scope | net10.0 | net48 | | --- | --- | --- | | Server | 5,187 passed; 56 skipped | Affected surface: 2,160 passed; 1 reproduced baseline failure; 56 skipped | | Client | 2,202 passed; 2 skipped | 2,204 passed; 5 skipped | | History integration | 519 passed; 21 skipped | 519 passed; 21 skipped | | Redundancy server | 641 passed | 641 passed | | Redundancy client | 124 passed | 124 passed | | Core shared-store regression suite | 23 passed | 23 passed | All six affected samples passed non-incremental Release/net10.0 builds with zero warnings and errors: ConsoleReferenceClient, ConsoleReferenceServer, RedundantServer, RedundantClient, MinimalBoilerServer, and PumpDeviceIntegrationServer. The published self-contained win-x64 NativeAOT executable is 116,924,928 bytes and has no CLR header or managed runtime dependency. Direct execution passed **HistoryAotTests 3/3** and **RaftAotTests 2/2**. Final standards and specification reviews found no confirmed outstanding high/medium functional gaps or hard standards violations. The remaining constructor-purpose clarification is addressed in `f6dbefb1c`. ### Reproduced baseline exceptions The net48 hosted-startup timeout also reproduces in a pristine worktree at the previous PR head, `24cf1416d`, in `RegisterPostStartRegistriesWiresHistorianAndAliasStoresOnPlainServerAsync`, with the same subsequent certificate-leak assertion. The corresponding renamed case fails before startup in the reviewed branch as well. This is reported separately from the net48 affected-surface results, not counted as a passing full Server suite. The net48 matrix selected the historian, aggregate, monitored-item, fluent, and continuation surfaces and excluded the Hosting namespace. `DurableDataValueQueueVerifyReferenceBatchingAsync` failed at item 1000 in the net48 affected-surface run and passed its single isolated rerun. The same failure at the same assertion reproduces on pristine `849e16acc`; the test, sample queue, queue factory, and batch persistor are unchanged. The original failure remains in the table rather than being erased by the rerun. ### CI source repairs - `4be7eb8f7` keeps diagnostics/configuration managers out of distributed address-space replication. Those managers inherit the source interface, but their live server state and redundancy metadata must remain replica-local. The ownership regression passes on net10.0 and net48, and all nine redundancy sample CI tests pass locally. - `d17f467b3` completes the sample startup repair: core managers are also replica-local; the startup banner no longer advertises readiness before initialization; the producer starts after distributed services; and native Raft startup no longer forces disruptive extra elections. The full sample suite passed 9/9, with initialized `RedundancySupport=Hot`, and focused Raft/address-space regressions passed 8/8 and 3/3. - `81b0b72be` moves the unchanged distributed-historian NativeAOT scenario into a smaller, always-run companion executable to bound Apple's linker input. All 137 AOT tests remain present; the moved test and helpers are unchanged. GitHub and Azure publish/run both native executables, with separate result directories where they share a job. The companion passed actual Windows NativeAOT execution. Linux and Intel macOS CI passed both executables, but this split alone did not fix ARM64 macOS linking. The remaining historian graph is rooted by ReferenceServer startup, not just the relocated test. No test exclusion or speculative linker setting was added to conceal it. - `8a5842913` isolates the independent MCP test graph into an always-run native host. The existing MCP source and assembly leak hooks are linked unchanged, and evaluated compiler inputs prove exactly one owner for every test source: 133 main + 3 MCP + 1 historian = 137 declarations. All three hosts run on every AOT platform. The main Windows native object is 9.35% smaller; both changed publishes had zero diagnostics. MCP passed 3/3; the identical main executable passed 133/133 on one unfiltered followup after two initial endpoint-discovery connection failures, which remain recorded in the local evidence. - The previous Intel macOS job successfully published and executed its native tests, then failed on artifact-upload DNS (`ENOTFOUND`). No upload gate, shared environment setting, or cache configuration was disabled. The first repair round also encountered the unrelated `MetricsAreEmittedForChannelLifetimeAsync` timing failure on macOS Core. Neither that test nor channel-manager code is changed by this PR, and its assertions remain intact. It passed unchanged on the final repair head. On `d17f467b3`, the Linux and macOS redundancy sample jobs pass; the remaining failure was ARM64 Apple's `too many large addends` assertion. The verified upstream relocation-anchor fix (dotnet/runtime#124721, backport dotnet/runtime#132171) is not present in the shipping ILCompiler 10.0.11. An experimental multi-module probe failed and was rejected, not added to CI. On `8a5842913`, [`aot-macos-latest`](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/34102158680/job/101678934057) successfully publishes and executes all three native hosts on ARM64: 136 main runtime cases, 1 historian case, and 3 MCP cases, with no skips. The previous Apple linker blocker is resolved. Linux NativeAOT also passes. No assertion, test, shared environment setting, cache, or required gate was weakened. The same CI run reports a separate macOS Sessions teardown failure: all 662 executed tests pass, but the global leak assertion detects one undisposed certificate. The MCP partition changes no runtime, Sessions, or test-fixture code. A single unchanged diagnostic rerun is queued once GitHub permits rerunning that job; the failure is not suppressed or counted as green. Other CI checks are still pending. ## Related issues - Fixes #4387 - Fixes #4400 ## Checklist - [ ] I have signed the CLA and read the contributing guide. - [x] I have added regression tests and directly related documentation. - [x] I have retained working reference and redundant-server sample wiring. - [x] Final validation and review evidence is complete, including the baseline exceptions above. - [ ] All required CI checks pass; the fail-fast rerun for `73c619435` is pending. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 9dbd9527-d818-47a0-984c-fbb1472d3d6b	2026-09-08 11:32:23 +02:00
romanett	f4e93eab93	Fix public IsNodeInView/IsNodeInViewAsync overloads always returning false (#4333) ... # Description The public `IsNodeInView(OperationContext, NodeId, object)` in `CustomNodeManager2` and `IsNodeInViewAsync(OperationContext, NodeId, object, CancellationToken)` in `AsyncCustomNodeManager` unwrap the `NodeHandle` and forward `handle.Node` together with the **unchanged** `OperationContext`. Since there is no `NodeState`-taking overload with an `OperationContext`, overload resolution binds the call back to the same public `(object)` overload; the recursive call's `is not NodeHandle` guard then returns false. As a result both entry points always reported "not in view" for a validated handle, regardless of the view. The sync variant has behaved this way since the initial commit; the async port copied the same pattern. The defect is latent in the SDK today: nothing calls `INodeManager2.IsNodeInView` / `IsNodeInViewAsync` except the sync/async adapters forwarding to each other, and Browse view filtering flows through the protected virtuals directly. External code calling the public API (e.g. node managers ported from the samples) was affected. Changes: - Both public overloads now copy the operation context (`SystemContext.Copy(context)`) and delegate to the overridable protected `IsNodeInView(ServerSystemContext, NodeId, NodeState)` helper — the same virtual Browse filtering uses and sub-classes override. Doc remarks name the virtual to override. `IsNodeInViewAsync` drops its now-unneeded `async` keyword (signature unchanged). - New regression test `IsNodeInViewAsync_HandleWithNodeUsesOverridableIsNodeInViewAsync` runs against the native async manager (both monitored-item manager configurations) and against `CustomNodeManager2` behind `AsyncNodeManagerAdapter`. It covers: known view → true, unknown view → false, placeholder handle without node → false, the sync entry point via `SyncNodeManager`, and — via an override hook on the testable managers — that the public entry points genuinely route through the overridable protected virtual. The test was verified to fail against the unfixed code. - The characterization test that locked in the broken sync behaviour (`IsNodeInView_ValidatedHandleReturnsFalseFromPublicOverloadRecursion`, flagged "not fixed here") is replaced by `IsNodeInView_ValidatedHandleDelegatesToProtectedOverload`, asserting the fixed behaviour. Verified locally: all `IsNodeInView*` tests and the full node-manager suites (484 tests) pass on net8.0; `Opc.Ua.Server` builds warning-free on net472. ## Related Issues Found while migrating the Views sample, whose view filtering uses the protected sync virtuals and is unaffected. - OPCFoundation/UA-.NETStandard-Samples#758 ## Checklist _Put an `x` in the boxes that apply. You can complete these step by step after opening the PR._ - [x] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [ ] I have addressed **all** PR feedback received. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Fable 5 <noreply@anthropic.com>	2026-08-29 13:59:50 +02:00
romanett	8634a18884	Simplify server shutdown teardown (#4262) ... # Description Server shutdown had grown into roughly 500 lines of coordination machinery in `StandardServer.OnServerStoppingAsync` and `ServerBase.StopAsync`: a `ServerShutdownState` state machine, request-admission-close gates, lifecycle-waiter drain coordination, multi-stage base-resource disposal, and a large set of `ForTest` hooks. Most of that existed to guarantee no request was still dispatching into the address space when it was torn down. That guarantee is now provided directly by disposing the request queue, so the surrounding machinery is no longer needed. ## Approach - **Run once, re-armed on restart.** `ServerBase.StopAsync` now uses a shared-task guard (`m_stopTask ??= StopCoreAsync(...)` under a `System.Threading.Lock`), so concurrent and repeat callers await the same completion. `InitializeRequestQueue` (which already runs on every start) resets the guard, re-arming shutdown for a restarted server. - **Drain via the request queue.** Teardown disposes the request queue first through the new `StopRequestQueue()`, which cancels in-flight processing and waits for the workers before any NodeManager is stopped. `RequestQueue.Dispose` is now idempotent because the queue can be disposed both by shutdown and later by base disposal / re-init. - **Linear teardown.** `OnServerStoppingAsync` is now short and linear: shutdown delay, stop the registration timer, unregister from discovery, then an ordered teardown (lifecycle begin, subscription manager, session manager, node managers, lifecycle complete, dispose) that collects per-stage failures into an `AggregateException`. `Dispose`/`DisposeAsync` reduce to the same shared-task pattern. - **Trim the lifecycle extension.** Removed the shutdown-only request-admission members from `RequestManager` and `RequestManagerLifecycleExtension` (admission close, admission validation, repeat-until-idle drain). The lifecycle-waiter machinery that live NodeManager replacement (`NodeManagerLifecycle`) still depends on is kept intact. Net effect is about 1500 lines removed against roughly 190 added. ## Notes for reviewers - The drain is cancellation-based rather than a graceful wait: disposing the queue cancels in-flight request processing and drains queued requests to `BadServerHalted`. This is the intended behavior for stop/dispose. - `RequestManagerLifecycleExtension` is deliberately only partially trimmed. Its waiter/exclusion logic is shared with `NodeManagerLifecycle`, so only the members that were exclusive to the old shutdown path were removed. - The removed `ForTest` hooks drove three now-deleted test files' worth of coordination assertions; those tests were rewritten or removed. A minimal `BaseResourcesDisposedForTest` hook is kept for the rewritten dispose tests. ## Related Issues N/A ## Checklist - [ ] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [ ] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [x] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [ ] I have addressed **all** PR feedback received. --------- Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>	2026-08-18 07:05:35 -07:00
Marc Schier	5bc8a9d705	Reduce ISession: type the continuation points, delete the obsolete validate overload (#4199) ... ## Stacked on #4197 Base is `marcschier/server-bind-phase`. The full stack is **#4188 → #4193 → #4197 → this**. GitHub retargets each base automatically as the stack merges. **Review the earlier three first.** **#4217 has been merged into this branch** (squash `53dd4b618`), so the last remaining item from the issue — `ISession.SessionDiagnostics` — is now part of this PR. Closes #4187. Refs #4203 — **does not close it.** #4217 swapped `OnUpdateDiagnostics` onto `m_diagnosticsLock`, but it still calls `Variant.FromStructure(ServerDiagnostics)` with the default `copy: false`, which wraps the *live* structure in the `ExtensionObject`. The caller reads its fields after the lock is released, so the lock currently excludes nothing. #4222 adds `copy: true` and is what actually closes #4203. ## The finding that changed the approach `ISession` has **exactly one production adapter**: `src/Opc.Ua.Server/Session/Session.cs`. The other `ISession` implementations in the tree are the unrelated **client** interface (`src/Opc.Ua.Client/Session/Session.cs`, `RedundantClientSession`) and a migration-analyzer test stub. One adapter means the seam is hypothetical; two means it is real. The issue proposed splitting `ISession` into five concern-interfaces — that would turn one hypothetical seam into five. The interface earns its keep for testability and because node managers receive it through `OperationContext`, but that argues for making it **smaller**, not for multiplying it. **So: reduce, don't split.** Reasoning posted to the issue as [comment 5226712936](https://github.com/OPCFoundation/UA-.NETStandard/issues/4187#issuecomment-5226712936) so the five-way framing does not get re-proposed later. ## Measurement 38 members, 368 references. External production consumers are **4 files using 5 members**: | Consumer | Members used | |---|---| | `Opc.Ua.Redundancy.Server/Sessions/DistributedSessionManager.cs` | `Id`, `InitializeAsync`, `Dispose` | | `Opc.Ua.Di.Server/Locking/DefaultLockService.cs` | `Id` | | `samples/ConsoleReferenceServer/UAServer.cs` | `Id`, `Identity`, `ReadDiagnostics` | | `samples/Quickstarts.Servers/.../DataChangeMonitoredItem.cs` | type reference only | Every production caller of the five continuation-point members is inside `Opc.Ua.Server` (`MasterNodeManager`, `NodeManagerLifecycle`, `HistorianDispatcher`). **`ISession` is 38 → 32 members.** ## Commits ### `882b2937` Type the history continuation point `ISession` leaked `object` twice, against the repository rule: ```csharp void SaveHistoryContinuationPoint(Guid id, object continuationPoint); object? RestoreHistoryContinuationPoint(ByteString continuationPoint); ``` The erasure was **not** hiding a genuinely opaque plugin token. `HistorianDispatcher` is the only production caller, it always passes a `HistorianContinuationState`, and it casts straight back to that type on restore. The `object` was a round trip through the type system that bought nothing. `HistorianContinuationState` is `internal`, so it cannot appear on a public interface. `IHistoryContinuationPoint` names the concept instead: it carries an `Id` and extends `IDisposable`. Two latent bugs fell out of typing it: - The session disposed only those points that **happened** to implement `IDisposable` and **silently leaked the rest**. Every point is now disposable by construction, and three `as IDisposable` probes are gone. - Carrying the `Id` on the point removes the separate `Guid` parameter, which could disagree with the payload it was filed under. The mock stores in the historian tests had the same latent inconsistency. ### `0d020b77` Delete the obsolete synchronous `ValidateBeforeActivate` **Zero production callers** — the nine references were all tests written for it. `[Obsolete]` since 1.5.378, which the repository rules allow removing in master. It is also the divergent-signature problem the runtime analysis flagged: the async form returns the validated handler and policy as a tuple, while the sync one took the same two values as trailing `out` parameters, so a caller had to learn two shapes for one operation. The overload could not verify a user token requiring decryption, so on a secure endpoint it failed closed and told the caller to use the async path anyway. The one test asserting that fail-closed behaviour goes with the method it described; the path it pointed at is already covered by `ActivationValidationDecodesBinaryEncodedUserIdentityToken`. The other eight tests are **converted, not deleted** — the channel, signature, security-policy and token-policy validation they cover is still asserted, now against the path the server actually uses. ### `821e8302` Route the continuation points behind one member Five `ISession` members were one-line pass-throughs to `SessionContinuationPoints`, a 419-line module that already owns the behaviour and already has its own `IContinuationPointStore` seam. The interface restated the module's surface without adding anything. ```csharp // was session.SaveContinuationPoint(cp); session.RestoreHistoryContinuationPoint(bytes); // now session.ContinuationPoints.SaveBrowse(cp); session.ContinuationPoints.RestoreHistory(bytes); ``` The holder is `internal sealed`, so `ISessionContinuationPoints` is what makes it addressable. **This is composition, not the service locator `IServerContext` refused to be.** A subsystem with an independent lifetime should be injected; continuation points belong to the session and cannot exist without it. `InvalidateContinuationPoints` called `RemoveBrowseForManager` and `RemoveHistoryForManager` in sequence, so the pair becomes `RemoveForManager` — the caller's intent is that a node manager is going away, not that two collections need visiting. ## Tests Three harnesses had hand-rolled a `Dictionary<Guid, object>` to stand in for the holder. They now use the **real** one, so the dispatcher and `BrowseNext` meet the eviction and disposal rules a live session actually applies. **One hazard worth recording for future interface work.** A Moq member that is never stubbed returns `null`. Where the old code called a method straight on `ISession`, that `null` was harmless. Reaching *through* a property means an unstubbed `ContinuationPoints` null-derefs instead. Three tests failed exactly that way; they are wired to a real holder, not restubbed. | Suite | net10.0 | net48 | |---|---|---| | `Opc.Ua.Server.Tests` | 4032 passed, 1 failed | builds clean | | Touched areas (continuation points, historian, master node manager, session) | 898 passed | — | The single failure is `ConfigureApplicationBuildsSharedClientAndServerConfigurationAsync`, a local certificate-store problem verified to reproduce unchanged at HEAD with these changes stashed. Not caused by this PR. `Opc.Ua.Redundancy.Server`, `Opc.Ua.Di.Server`, `Quickstarts.Servers` and `ConsoleReferenceServer` all build clean. ## Docs `docs/MigrationGuide.md` gains a "Removed members on ISession" section covering the `ValidateBeforeActivate` removal with the async replacement, and the `IHistoryContinuationPoint` change with before/after. ## The SessionDiagnostics removal (folded in from #4217) `ISession.SessionDiagnostics` handed out the whole mutable `SessionDiagnosticsDataType` — the structure the session's diagnostics lock protects — so a caller could read a field while the owner was writing it. Every server-side reader wanted exactly one value out of it, so the interface now exposes those two values (`SessionName`, `ClientApplicationUri`) directly and the structure stays behind the lock. That work landed here as #4217 rather than as a separate PR, and it also fixes #4203: `OnUpdateDiagnostics` now takes `m_diagnosticsLock` instead of locking the diagnostics payload it was handed. ## Reviewer questions - `ISessionContinuationPoints` exposes `MaxBrowse` as read-only while the concrete holder keeps a setter (the test framework adjusts it to exercise limits). Should the setter be on the interface, or is test-only mutation better left to the concrete type? - `RemoveForManager` collapses two removal methods. The concrete `RemoveBrowseForManager`/`RemoveHistoryForManager` remain public on the holder — worth making them private now that nothing outside calls them individually? --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: e9c13dd0-a6e3-4ad2-8ad6-1c3fe6323041	2026-08-11 06:57:40 +02:00
Marc Schier	fb80bfdc82	[WotCon] Track WoT Connectivity/Binding 1.1 and add projections (Section 12) (#4182) ... Follow-up to #4128, which merged the WoT Connectivity 1.1 work against **draft2** of the companion specifications. Both drafts have moved since, and this branch tracks them through to **draft3**, adds the projection feature they introduced, and closes the gaps a bidirectional re-audit found. The specifications are the private [`OPCF-Members/spec-drafts`](https://github.com/OPCF-Members/spec-drafts) drafts of *OPC UA — WoT Connectivity 1.1* and *OPC UA — WoT Binding 1.1*. They are still drafts, which is why this is opened as a draft PR — see [Status](#status) at the bottom. ## What changed in the specifications Two revisions landed upstream while #4128 was in flight. **draft2** replaced the `eventGroup` / `actionGroup` grouping constructs with a single **projection / view** concept, added fifteen Section 6 vocabulary terms, and made two identifier rules normative. **draft3** ([spec PR #8](https://github.com/OPCF-Members/spec-drafts/pull/8)) un-deprecated the incorporated OPC 10100-1 v1.02 surface, restructured the conformance clause into three profiles, and tightened two security obligations. The draft3 NodeSet is **structurally identical** to draft2 — I diffed all 286 nodes node-by-node. Every change is metadata: 96 `ReleaseStatus="Deprecated"` attributes removed, `PublicationDate` advanced, and `WOTC-ProjectionMaterialization` claimed by three Type Nodes that previously implemented it in name only. ## Projections (WoT Binding Section 12) The substantial addition. A projection document selects affordances from other Thing Descriptions or Thing Models and resolves to a document of its own; materialized, it becomes an OPC UA `View` that **creates no affordance Node** and only `Organizes` what its sources already materialized. | Piece | Where | |---|---| | Document model and validation | `Opc.Ua.Types/Wot/WotProjection.cs`, `WotProjectionModel.cs` | | Four-stage resolution engine | `Opc.Ua.Types/Wot/WotProjectionResolver.cs` | | Materialization plan | `Opc.Ua.WotCon.Server/Materialization/WotViewProjectionPlan.cs`, `WotProjectionViewBuilder.cs` | | Live address-space host | `WotProjectionViewNodeManager.cs`, `LifecycleWotViewProjectionHost.cs`, `IWotViewProjectionHost.cs` | | Node lookup seam | `IWotMaterializedNodeIndex.cs` | Groups reached by `ua:Organizes` become organizational Objects rather than nested Views, only the outermost materialization is a `View`, and a member whose source is served by another server is omitted and reported rather than recreated — the federation case the clause calls out. ### How this is validated The specification publishes twenty worked examples, two of which are a **golden pair**: a projection document and the resolved view it is defined to produce. `WotSpecExampleTests` embeds all twenty and runs the pair through the resolver, asserting against *the specification's own expected output* rather than against my reading of the prose. That single document exercises all three selection forms, the bulk naming rule, the security closure naming and the provenance term. This is the strongest evidence in the PR, and it is worth more than the unit tests around it: it is the same check the upstream `validate_local.py` performs. ## Other spec work - **Section 6 vocabulary** — fifteen missing model and platform terms with their validation rules (`WotNodeSetConverter.ModelVocabulary.cs`). - **Portable identifiers** — the two rules release 1.1 made normative, with `WotNodeSetConverterOptions.AllowNonPortableIdentifiers` as a documented downgrade-to-warning switch for documents authored against v1.00. Defaults to `false`. - **xRegistry §6.9 identifier construction** (`XRegistryIdentifier.cs`) — reverse-authority symbolic identifiers; all seven published worked examples are test cases. ## Gaps found by re-auditing against draft3 I audited in both directions — every normative requirement to code, and every `uav:` term in code back to a spec that defines it. Three findings, all fixed: 1. **`Wot-Con 1.02` accepted anything well-formed.** draft3 makes format validation part of the unit, because *WoT-Con Minimal* is one unit wide and materialization projects a *valid* document. The 1.02 upload path only deserialized into the `ThingDescription` POCO, which happily accepts JSON that is not a WoT document at all — every member of that type is optional, so `{}` deserialized and was materialized. It now parses via `WotDocument.Parse` and requires the document to identify itself by a non-empty `name` or `title`, returning `Bad_DecodingError` and materializing nothing otherwise. The rule lives in `ThingDescriptionFormatValidator` and is shared with `CreateAssetForEndpoint`, whose auto-generated Thing Descriptions §11 also treats as untrusted input. 2. **Two `WoTFile` operations were ungated.** draft3 §11 names `Write` and `CloseAndUpdate` alongside the five management methods; both reached the materializer without an access check. `EnforceManagementAccess` is now wired into `WotAssetFileManager`. 3. **Two invented `uav:` terms.** `uav:NodeSet2Preservation` was declared and never used — removed. `uav:eventFields` is read by `OpcUaBindingPlanner` and defined in *neither* spec, while a comment claimed it came from OPC 10101. It still works for compatibility but is now documented as a non-standard extension at both sites rather than misattributed. The SSRF prohibition is satisfied by construction: there is no HTTP client anywhere in these assemblies, and all resolution goes through the injected `IWotThingResolver`. ## Two ambiguities fixed in the specifications themselves The audit turned up two places where a conforming implementer had to invent an answer. Rather than pick silently, I took both upstream — they are pushed to [spec-drafts PR #8](https://github.com/OPCF-Members/spec-drafts/pull/8) (all checks green) and are now normative in *Binding* §12.6 and *Connectivity* §7.13: - **`ViewVersion`** had one sentence saying only *that* it changes. It now changes iff the resolved membership changes, is updated at commit time alongside the `NodeVersion` stamping, and is a deterministic function of the membership alone in a canonical order — so two servers that resolved the same membership agree, which a per-server counter would not across a redundant pair. Explicitly **not monotonic**: compare for inequality only. - **"Type-level view"** was used once in §12.2 and defined nowhere, while every other statement of materialization was universal. §12.6 now *defines* it rather than contradicting §12.2: the NodeClass is `View` in both cases. Both were already what this code did, so neither changed behaviour — but the order-insensitivity the clause added was **not** covered by any test, and `ViewVersionIsUnchangedWhenOnlyTheOrderOfTheMembershipChanges` now holds it. It is mutation-verified: removing the ordinal sort turns it red. `docs/WotBindings.md` no longer lists these as points "the specification leaves open". ## Validation | Suite | Result | |---|---| | `Opc.Ua.Types.Tests` | 8525 ✅ (8518 on net48) | | `Opc.Ua.WotCon.Tests` | 1057 ✅ (net10.0 and net48) | | `Opc.Ua.WotCon.Bindings.Tests` | 559 ✅ | | `Opc.Ua.XRegistry.Tests` | 196 ✅ | | `Opc.Ua.Server.Tests` | 4027 ✅ | | `Opc.Ua.SourceGeneration.Core.Tests` | 3771 ✅ | | `Opc.Ua.WotCon.Samples.Tests` | 9 ✅ | The full `UA.slnx` builds with **0 errors and 0 warnings attributable to this PR** on all 6 TFMs (`TreatWarningsAsErrors` is on). `Opc.Ua.Server.Tests` and the source-generation suites are listed because this PR now also touches `MasterNodeManager` and the WoT-Con NodeSet. ## Compatibility No public API is removed or broken. Everything added is new surface using `ArrayOf<T>` / `ByteString` per the repo conventions, wired for DI with a direct-construction fallback, and the one behavioural tightening (`Wot-Con 1.02` format validation) rejects input that was never valid to begin with. One pre-existing issue is **not** addressed here because it came in with #4128 and is out of scope: `WotAssetFileManager.OnCloseAndUpdate` uses `.GetAwaiter().GetResult()`, which the repo rules ban. Worth a follow-up. ## Landed since this PR was opened - **DI upgraded to 1.05.0.** `ConnectsTo` was declared a subtype of `HierarchicalReferences`, contradicting OPC 10000-100 §5.5 Table 48. That is an upstream error in every official DI NodeSet up to 1.04, corrected by the OPC Foundation in 1.05.0, so the fixture is replaced with the verbatim 1.05.0 file rather than hand-patched. A guard test pins the corrected form. This also closed a second gap: six DI types the WoT model was missing are 1.05 additions. - **The sample Pump has the type definition OPC 40223 declares for it.** `Pump1.Identification` carried DI's `FunctionalGroupType` instead of `PumpIdentificationType`. Every test, the sample documents and the README agreed with each other about it, which is why it survived. - **`WotPumpAddressSpaceComparisonTests`** compares this server against `PumpDeviceIntegrationServer`, which builds the same OPC 40223 Pump from generated NodeSets and hand-written wiring. An independent oracle rather than a restatement of the same assumptions - it is what found the defect above. - **Error containment in `MaterializeProjectionViewsAsync`.** An exception mid-loop discarded the applied View handles before they were published, leaving View Nodes in the address space that nothing could remove. - **`HasWoTProjection`** is now created; it was documented and plumbed but never wired. - **The default in-memory View host** no longer deletes the View it has just applied. - **An undeclared NodeSet alias now says so.** It previously surfaced as `IdentifierMissing`, naming neither the value nor the fact that an alias was expected. - **`ViewVersion` follows the algorithm the specification now states.** My earlier spec text was rejected on review, correctly: it named neither the function nor the canonical order it demanded, ignored that OPC 10000-3 §5.4 requires a value greater than zero, and its "when, and only when" is unsatisfiable for a 32-bit value. §12.6 now specifies the algorithm outright and this implementation follows it exactly, pinned by an independently computed test vector. Implementing it surfaced a further defect in the clause - joining members on U+000A is not injective, because a NodeId string identifier may itself contain U+000A - which is fixed in the specification by length-prefixing each member. - **An auto-generated Thing Description is treated as untrusted input.** §11 requires it; `CreateAssetForEndpoint` validated the endpoint but handed whatever the discovery provider returned straight to the materializer. The `Wot-Con 1.02` format rule now gates both paths from one place. - **Document bytes moved out of the registry snapshot** into a content-addressed store, so a commit no longer rewrites the whole corpus to edit one document. Writes stage and are promoted during the commit, which preserves both durability-first ordering and the fail-closed rule that a blob directory without a manifest means operator recovery. Restoring streaming digest verification along the way closed a real gap: content integrity had degenerated to a length comparison. - **External references now reach a NodeManager registered later.** A reference to a Node that does not exist yet is dropped rather than queued, and the dynamic-registration path had no second phase to apply them in, so registering a NodeSet before the one it points into lost the forward edge permanently. Review of that change then found a state leak in its rollback path, fixed with a red-to-green regression test. - **`WOTC-Legacy` is renamed `Wot-Con 1.02`** in the specification and here. Editorial: the NodeSet diff is `<Category>` values only. ## Status Open for review. Two things may still move: 1. **The specifications are unpublished drafts.** Anything here can change if the working group decides differently. The `ViewVersion` definition has since been settled - §12.6 specifies the algorithm and this follows it - but the same could happen to any other clause tracked here. 2. **`uav:eventFields`** is kept as a documented non-standard extension. That is a judgement call the WG may want to reverse, either by adopting the term or removing it. Two known items are recorded rather than fixed: - `Pump1` has no hierarchical parent, so it is reachable by NodeId but not by browsing down from `Objects`. The cross-NodeSet ordering defect this was originally attributed to is fixed above, and cross-manager references are now symmetric in both registration orders. The Pump itself is still blocked on a different cause found while verifying that fix: with the reference added, `DeviceSet` exists but the Pump has **zero** inverse references, so the edge is dropped at *import* - before any external-reference machinery runs. That is a separate defect in the materialization path, not the one that was fixed, and it is left recorded rather than guessed at. - `WotAssetFileManager.OnCloseAndUpdate` uses `.GetAwaiter().GetResult()`, which the repo rules ban. Pre-existing from #4128 and out of scope here. Review of the projection resolver and the materialization host is the most valuable thing to look at; the vocabulary and identifier commits are mechanical by comparison. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 9e6a5abf-3299-4cd1-9855-010fedbf0ad8	2026-08-08 09:08:23 +02:00
Marc Schier	e73e71184d	[WotCon] Add OPC UA WoT Connectivity 1.1 with the Types, source generation, Server and xRegistry work it builds on (#4128) ... ## Summary Adds OPC UA WoT Connectivity 1.1 to the stack, together with the Types, source generation, Server and xRegistry work it is built on. This branch is the merge point for the fourteen-PR stack that replaced integration PR #4093; every constituent PR was reviewed and approved separately and is listed below. 414 files changed, +108,936 / -3,199. Roughly 46k added lines of product code, 57k of tests, plus samples, tools and documentation. ## Types - Complete `ExtensionObject` raw-body decoding for binary, XML and JSON bodies by resolving the concrete type through the message context's encodeable factory, and simplify the `Variant` structure helpers by delegating to it (#4128). - Add `IAtomicFileReplace` as an optional `IFileSystem` capability so existing external implementations keep working, with atomic publish for `LocalFileSystem` via `File.Replace`/`File.Move` and for `VirtualFileSystem` by re-keying the in-memory entry (#4128). - Add lossless conversion between WoT documents and NodeSet2 (`Opc.Ua.Wot.WotNodeSetConverter`). A byte-exact `uav:nodeSet` envelope is preserved when requested, the structured `uav:nodes` projection is used when the readable vocabulary is incomplete, and NodeSet2 is otherwise synthesized from readable WoT terms. Unmapped JSON members survive a round trip as pointer-addressed residue (#4131). ## Source generation - Improve the NodeSet to ModelDesign conversion and the generated node state (#4132). - Generate OPC UA models directly from WoT Thing Description files (#4134). ## Server - Add live NodeManager shadow and immediate reload. A reload materializes a new generation beside the active one and switches atomically; the superseded generation is retired gracefully so existing MonitoredItems keep being served until they drain, or immediately when the caller asks for it. Includes the request admission and drain machinery that lets an orderly shutdown wait for admitted requests instead of tearing down underneath them (#4147). - Make subscription transfer between sessions transactional, so a failed transfer leaves neither session holding a partially moved subscription (#4150). ## xRegistry - Allow clients to use explicit registry roots rather than assuming a well-known location (#4130). ## WoT Connectivity - Add the WoT Connectivity 1.1 information model: a registry-first revision layered on the abstract xRegistry base model, incorporating the complete published OPC 10100-1 v1.02 surface as deprecated nodes in the same namespace so existing 1.02 clients keep working (#4139). - Add the protocol binding abstractions and planners that compile WoT forms into executable plans (#4140). - Add the HTTP, Modbus, OPC UA and MQTT binding executors (#4144). - Add the registry and its stores, including document versioning, validation, dependency resolution and refresh (#4146). - Add the registry client (#4142). - Materialize WoT Thing Descriptions into the server address space, deriving types from Thing Models and instances from Thing Descriptions (#4154). - Restore the WoT asset registry bridge so the deprecated 1.02 asset surface is backed by the registry (#4171). - Add the WoT Connectivity samples and complete the documentation (#4156), and restore the remaining coverage and docs (#4172). ## New projects `src/Opc.Ua.WotCon.Bindings`, `src/Opc.Ua.WotCon.Bindings.Mqtt`, `tests/Opc.Ua.WotCon.Bindings.Tests`, `tests/Opc.Ua.WotCon.Samples.Tests`, and the `samples/WotCon` AggregationServer, AggregationClient and FlatTagServer samples. ## Constituent pull requests Merged into this branch top-down, each independently approved: | PR | Title | | --- | --- | | #4128 | [Types] Complete ExtensionObject decoding and add an atomic file replace capability | | #4131 | [Types] Add lossless conversion between WoT documents and NodeSet2 | | #4132 | [SourceGeneration] Improve NodeSet to ModelDesign conversion and generated node state | | #4134 | [SourceGeneration] Generate OPC UA models from WoT Thing Description files | | #4147 | [Server] Add live NodeManager shadow and immediate reload | | #4150 | [Server] Make subscription transfer between sessions transactional | | #4130 | [XRegistry] Allow clients to use explicit registry roots | | #4139 | [WotCon] Add the WoT Connectivity 1.1 information model | | #4140 | [WotCon] Add the WoT protocol binding abstractions and planners | | #4144 | [WotCon] Add the HTTP, Modbus, OPC UA and MQTT binding executors | | #4146 | [WotCon] Add the WoT Connectivity registry and its stores | | #4142 | [WotCon] Add the WoT Connectivity registry client | | #4154 | [WotCon] Materialize WoT Thing Descriptions into the server address space | | #4156 | [WotCon] Add the WoT Connectivity samples and complete the documentation | | #4171 | Restore WoT asset registry bridge | | #4172 | Restore WoT coverage and docs | Supersedes #4093. ## Follow-up The WoT Connectivity and WoT Binding drafts have moved to 1.1-draft2 since this work was authored. Aligning with that revision - the removed group vocabulary, the new projection/View construct, the remaining model vocabulary terms and the two new portable-identity validation rules - is tracked separately and will follow in its own pull request. ## Validation Built for every target framework with zero warnings and zero errors, and validated at the tip of the stack with `Opc.Ua.WotCon.Tests` at 999 passed / 0 failed and `Opc.Ua.Server.Tests` at 4024 passed / 0 failed. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 9e6a5abf-3299-4cd1-9855-010fedbf0ad8	2026-08-05 10:14:15 +02:00
Marc Schier	168b3de353	Replace the RequestManager AsyncLocal guard with an explicit operation context (#4163) ... # Description `RequestManager` tracked whether the calling flow was serving a Client request in a `private readonly AsyncLocal<bool> m_inServiceDispatch`. It was set by a `StandardServer.ProcessRequestAsync` override and read by `NodeManagerLifecycle`, so that a lifecycle operation (`AddAsync` / `ReloadAsync` / `RemoveAsync`) started from inside a request fails fast with `InvalidOperationException` instead of draining — and therefore waiting for — its own request. Two problems with that mechanism, raised in review of #4093: 1. An `AsyncLocal<T>` written inside an `async` method never flows back to the caller that awaited it, so every scope had to chain to the previous value by hand and restore it on dispose. Subtle, and easy to get wrong when a new entry point is added. 2. Ambient state is invisible at the call site, so the lifetime of the mark could not be reasoned about from the code that depended on it — especially once work is handed to a background task. `RequestManager` also had no business carrying ambient state on behalf of a different subsystem; its job is tracking requests for the drain. ## What changed The guard is now an **exact identity lookup** against the request registry `RequestManager` already maintains, and the operation is threaded **explicitly**: * **`RequestManager`** — `internal bool IsExecutingRequest(IOperationContext?)` performs a reference-identity lookup against `m_requests` under the existing `m_requestsLock`. `m_inServiceDispatch`, `EnterServiceDispatchScope()`, the nested `ServiceDispatchScope` class and the flag-based `IsExecutingRequest` property are gone. * **`StandardServer`** — the `ProcessRequestAsync` override is removed; it existed only to open the dispatch scope. * **`INodeManagerLifecycle`** — every member (`AddAsync` ×2 factory kinds, `ReloadAsync` ×2, `RemoveAsync`) now takes the caller's `IOperationContext?` directly, ahead of `CancellationToken ct = default`. No overloads and no parallel signature are kept: the interface is new in 2.0 and outside the 1.5.378 compatibility rule, so call sites state their context explicitly or pass `null`. * **`HostedNodeManagerLifecycle`** and **`RuntimeNodeSetLifecycleExtensions`** thread the argument through; `AddRuntimeNodeSetAsync` / `ReloadRuntimeNodeSetAsync` remain single methods. * **`SystemContextOperationExtensions.GetOperationContext(this ISystemContext)`** (new, `Opc.Ua.Core`) lets a NodeManager or Method callback hand over the operation it already received without downcasting. It switches on `SessionSystemContext` and `SystemContext`, the two independent roots every context derives from. No new interface is introduced: casting the context to `IOperationContext` would not do, because a context implements that by delegating to the operation it was created for, so the cast yields the context rather than the operation. * **`NodeManagerLifecycle.EnsureNotRequestCallback`** no longer consults `ServerState`. The previous `CurrentState == Running` predicate could let a genuinely re-entrant call slip past while the server was shutting down; the request registry answers exactly in every state. A NodeManager or Method callback now reads: ```csharp await m_lifecycle.ReloadAsync(m_registration, replacement, context.GetOperationContext(), ct); ``` and a control-plane caller (hosted service, DI consumer) passes `null`. ## Behaviour Unchanged for the case the guard exists to catch: a lifecycle call made on behalf of an executing request is still rejected up front with the same `InvalidOperationException` and the same message. Two deliberate differences: * **Improvement** — an internal `OperationContext` that was never enrolled as a Client request is now correctly allowed through. The boolean flag could not distinguish it from a real request. * **Accepted trade-off** — a caller inside a request that passes no operation is no longer detected at entry and falls back to the pre-existing bounded `RequestManager.RequestDrainTimeout`, which already covered any request that bypassed the service pipeline. Automatic detection for an uncooperative caller inherently requires ambient state, which is exactly what this change removes. Documented in `docs/NodeManagers.md`. ## Alternatives considered and rejected | Alternative | Why rejected | | --- | --- | | Delete the guard, rely only on `RequestDrainTimeout` | Turns a clear immediate error into a multi-minute hang. | | Infer the caller from the `CancellationToken` it passes | Works only for the exact request token, breaks on linked tokens; ambient magic of a different kind. | | In-flight callback counter on `MasterNodeManager` | False positives: rejects legitimate control-plane calls whenever any request is concurrently dispatching. | | Defer the drain to a background task so re-entrancy cannot deadlock | The drains are woven into transactional commit / rollback and binding reconciliation; deferring them breaks the transactional guarantees. | | `Activity.Current` / `ThreadLocal` | The same ambient magic the issue asks to remove. | ## Testing * `RequestManagerTests` — the three `EnterServiceDispatchScope` tests are replaced by coverage for `IsExecutingRequest(context)`: null, never-registered, only-while-scope-open, visible across an `await` and a background `Task.Run`, and two concurrently executing requests not confusing each other. * `NodeManagerLifecycleTests` — rejection from an executing request for Add / Reload / Remove without invoking the factory, acceptance for a context that is not an executing request, acceptance once the request has completed, and the full callback shape (`ServerSystemContext.Copy(operation)` → `GetOperationContext()` → rejected). * `HostedNodeManagerLifecycleTests` — forwarding tests for the caller-context argument on all five members. * `tests/Opc.Ua.Core.Tests/Stack/State/SystemContextOperationExtensionsTests.cs` (new) — `GetOperationContext` across both context roots and the null-argument guard. ## Related Issues - Fixes #4149 ## Checklist - [x] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [x] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [ ] I have addressed **all** PR feedback received. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 14402d11-e540-4faa-a5cd-94881bd7ce85	2026-08-03 20:31:51 +00:00
Marc Schier	636912bd4c	Harden subscription retirement after #4114 and refresh the client namespace table on model change (#4115) ... # Description Two things, both surfaced by the live NodeManager registration work in #4094. > **Rebased on #4114.** Upstream landed #4114 (`cc4667d0b`) while this PR was open; it fixes the > same #4113 root cause. `origin/master` is merged in and the conflicts were resolved **in favour of > the upstream API shape** — `CompleteAsync(IMessageProcessor, uint subscriptionId, ct)` with the > last known server id passed as an argument. The `IMessageProcessor.LastServerId` member this > branch had added is dropped again. What remains here is the orthogonal hardening #4114 does not > cover, plus all of the #4100 work. ## 1. Remaining subscription-retirement hardening (on top of #4114) #4114 fixed the id-collision itself. Three related holes in the same paths are still open: - **Retirement was not atomic with removal.** `RetireSubscriptionId` is now called *under* `m_subscriptionLock` from both `CompleteAsync` and `RemoveSecondaryPartitionAsync`. `GetById` resolves incoming publish responses under the same lock, so a worker could otherwise observe the subscription as removed while its id had not yet reached the retired-id ring — and send a redundant `DeleteSubscriptions` for an already-retired id. `RemoveSecondaryPartitionAsync` did not record the retired id at all. - **The retired-id ring was far too small.** `kMaxSubscriptionHistory` 10 → 256, so subscription churn cannot evict live history. - **The orphan delete was unguarded.** The publish worker no longer sends `DeleteSubscriptions` for an unresolved id while any subscription is still awaiting its id. A publish response can overtake the `CreateSubscription` continuation that assigns the id, and deleting in that window kills a healthy subscription. Leaving a genuine orphan alive until its lifetime expires is the safe trade-off. - **`PublishControllerAsync` lost resize signals.** It re-created its `AsyncAutoResetEvent` waiter on every loop iteration; the abandoned waiter stayed enqueued and swallowed a later `Set()`, so the publish worker pool stopped resizing. This is a second, latent starvation path independent of the id collision. The wait is now created once and only re-armed after it completes. ## 2. Managed client does not refresh the namespace table on model change (#4100) `NodeManagerLifecycle.NotifyCommittedChangeAsync` updates `NamespaceArray`, bumps `UrisVersion`, and then reports a **`BaseModelChangeEvent`** — an event shape that carries no `Changes` payload. The client tracker *did* observe it and cleared the `INodeCache`, but it held only an `IStreamingSubscription`, an `INodeCache` and an `ILogger`, so nothing could re-read the namespace table. A tracking client therefore resolved NodeIds from a namespace added by a live NodeManager registration against a stale `NamespaceUris` table. - **New `INamespaceTableRefresher`** (`NamespaceUris` + `FetchNamespaceTablesAsync`). The member signatures match what `Session` and `ManagedSession` already expose, so both satisfy the interface without any new members. `ISession` is deliberately left untouched — moving its members onto a base interface would be a binary break for 1.5.378 consumers. - **`ModelChangeTracker`** takes the refresher as an optional *trailing* constructor argument, which keeps every existing call site source-compatible and makes `null` the opt-out. A refresh runs when the event carries no per-node detail, when an affected node is `Server_NamespaceArray`, or when an affected namespace index is beyond the client's table. It runs **before** the cache is invalidated and before `ModelChanged` is raised, so subscribers that re-browse from the handler already see the new uris. A failing refresh is logged and swallowed. - **`ModelChangedEventArgs.NamespaceTableRefreshed`** reports the refresh to applications. - **`ManagedSession.EnableModelChangeTrackingAsync`** wires the session in, so opting into tracking is all an application has to do — no new option, no change to the positional `CreateAsync` signature. - **`ModelChange.TypeDefinition`** changes from `NodeId?` to `NodeId`. `NodeId` is a readonly struct implementing `INullable` and must not be wrapped in `System.Nullable<T>`; use `NodeId.Null` and `IsNull` instead. The type is 2.0-preview only (absent from 1.5.378), and the only producer is the tracker itself, which already assigns a non-null `AffectedType`. Per review feedback the type is also now a `readonly record struct`, matching `DataValueChange` / `EventNotification`. ## Tests Every new regression test was run against a temporarily re-introduced defect and **fails** there: | Test | Covers | |---|---| | `CompleteAsyncRetiresOnlyTheCompletedSubscriptionWhenOthersArePendingCreationAsync` | retire-by-identity (also guards #4114's fix) | | `CompleteAsyncRemembersRetiredServerIdAfterIdWasResetAsync` | retired-id history | | `PublishWorkerDefersDeletingUnknownSubscriptionWhileCreationIsPendingAsync` | orphan-delete guard | | `PublishControllerKeepsResizingAfterWorkersExitAsync` | publish-controller signal loss | | `ConcurrentAddAndCompleteRetireOnlyCompletedSubscriptionsAsync` | parallel add/retire registry integrity | | `ConcurrentSubscriptionChurnNeverStarvesASubscription` (integration) | #4113 repro against the reference server | | 7 × `ModelChangeTrackerTests` namespace-refresh cases | each trigger, no-trigger, throwing refresher, `null` refresher, ordering | | `LiveNodeManagerAddRefreshesTheClientNamespaceTable` (integration) | #4100 repro — times out without the wiring | `FakeMessageAckQueue` records both the completed id (upstream's assertions) and the completing instance (the identity assertion in `MessageProcessorTests`), so neither side's coverage was lost in the merge. Results after merging `origin/master`: - `Opc.Ua.Client.Tests` — **2119/2119** pass on net10.0; the new `ModelChange` and `SubscriptionManager` fixtures also pass on **net48**. - `Opc.Ua.Subscriptions.Tests` churn + coverage fixtures — **28/28** (net10.0); churn fixture also passes on net48. - `Opc.Ua.Server.Tests` `NodeManagerLifecycle*` — **49/49** on net10.0; the new fixture also passes on net48. - No new analyzer warnings; only the three pre-existing `CA1873` hits in `NodeCacheResolver.cs` and `ClassicSubscriptionEngine.cs` (untouched files) remain. ## Documentation - `docs/ModelChangeTracking.md` — new **Namespace table refresh** section with the trigger table, updated `ModelChangedEventArgs` / `ModelChange` snippets, updated manual-construction snippet, and a quick-reference row. - `docs/NodeManagerRegistration.md` — client-side half of the **Namespaces** section. No `docs/migrationguide.md` entry: every changed type is either `internal` or 2.0-preview-only. ## Related Issues - Fixes #4100 - Follow-up hardening for #4113 (closed by #4114) - Related to #4094, #3993 ## Checklist - [x] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [x] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [x] I have addressed **all** PR feedback received. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: e22f9b3c-1682-40bd-8b72-31a11352fa2c	2026-07-30 12:17:00 +02:00
Marc Schier	275c3800b5	[Server] Add live NodeManager lifecycle support (#4094) ... # Description Adds supported live add, reload, and remove lifecycle operations for NodeManager instances on a running server. The change introduces a DI-backed `INodeManagerLifecycle` service with direct `StandardServer` access, generation-aware registration handles, copy-on-write routing, transactional prepare/commit/rollback, runtime NodeSet convenience APIs, append-only namespace updates, model and semantic change notifications, additive-compatible complex type priming, and complete teardown behavior. Lifecycle publication is coordinated with requests, sessions, subscriptions, monitored items, continuation points, and shutdown so retired managers cannot remain reachable or be disposed while still in use. Compatible monitored items transfer to replacement generations without a transient bad status. Removed or incompatible Nodes publish `BadNodeIdUnknown` as required by OPC UA Part 4 section 5.8.4.1, retain their MonitoredItem identity, and automatically recover when a compatible Node with the same NodeId returns. Registration is documented end to end in the new [docs/NodeManagerRegistration.md](docs/NodeManagerRegistration.md), which covers compile-time, startup, and runtime registration together with the guarantees for MonitoredItems, Browse continuation points, namespace indexes, DataTypes, and change notifications. ## Review feedback addressed Interface surface reduced, as requested: - `INodeManagerMonitoredItemTracker` folded into `ISubscriptionMonitoredItemLifecycle`. - `INodeManagerMutationCoordinator` and the asynchronous MonitoredItem recovery entry point folded into `IDynamicNodeManagerHost`. - `ISessionClosingRegistry` folded into `IServerInternal`, then replaced by `ISession.IsClosing`. - `ISubscriptionDeletionRegistry` folded into `ISubscriptionManager`, then removed entirely. - `INodeManagerContinuationPointTracker` folded into `ISession`. - The synchronous recovery entry point kept on its own `ISyncNodeManagerMonitoredItemRecovery`, because `AddPredefinedNode` cannot await; it still routes through the asynchronous `INodeManagerMonitoredItemLifecycle` that `AsyncNodeManagerAdapter` exposes. - `IMonitoredItemLifecycle` renamed to `IDetachableMonitoredItem`. Reach into the Subscription area reduced to the minimum the feature needs: - The lifecycle feature itself leaves `SubscriptionManager` almost untouched: two guards that reject a request from a Session that is closing, on `CreateSubscription` and on `TransferSubscriptions`, because it would create state that is about to be torn down. The deletion claim registry, the session closing gates, the closed-session bookkeeping and the deletion restore paths introduced by earlier revisions are gone. Transferring a subscription away from a session that is closing stays allowed, since that is the recovery path the service exists for; the race that exposed is fixed by serialising source-queue closure with the transfer rather than by rejecting it. - Queueing is disabled again for a MonitoredItem with `QueueSize <= 1`, as before this PR. Without a queue the Client is served the last sampled value, so the missing-Node notification simply becomes that value; losing values is expected for a MonitoredItem without queuing. - What remains of the notification is one `DataValue` plus one bool in `DataChangeQueueHandler`, mirroring the existing overflow pair, which stops it being the value discarded when a configured queue is full. - `MonitoredItem` keeps its original publish path, its original queue creation and restore paths, its original triggering behaviour, and no per-epoch bookkeeping. - `IStoredMonitoredItem` carries `IsDeleted` and `IsDetached`, so a restored item reports the state it was stored with rather than one inferred from the last value's StatusCode. Other feedback: - Documented `HostedNodeManagerLifecycle`, `IDynamicNodeManagerHost`, `NodeManagerRoutingTable`, and the `RequestManager` validation and request scopes. - Renamed `ValidateMonitoredItemAsync` to `CanAttachMonitoredItemAsync` and `RestoreMonitoredItemAsync` to `RecoverMonitoredItemAsync`, so the lifecycle API no longer collides with the durable Subscription `RestoreMonitoredItem` path used at server startup. - Removed the `CustomNodeManager2` dependency from the synchronous MonitoredItem recovery path. - `DataChangeQueueHandler` is back to the two constructors 1.5.378 shipped, each taking an optional `TimeProvider`. - Session closing is a one-way latch, and the Session is removed even when teardown throws. - Documented what a custom NodeManager has to implement to take part in live lifecycle operations, and which NodeManager implements `INodeManagerReloadParticipant` today. ## Fixes found during review - The guard that stops a NodeManager lifecycle operation being started from inside a service handler never fired. It was backed by an `AsyncLocal` written inside `async ValidateRequestAsync`, which is invisible to the caller that awaited it, so a lifecycle call from a NodeManager callback waited for its own request and held the lifecycle semaphore forever. The mark is now applied by the service dispatcher, and the drain is bounded so no path can wedge the lifecycle permanently. - `ValidateRequestAsync` is no longer virtual. An override that rejected a request after calling `base` left it registered forever; subclasses now use `OnRequestValidatedAsync`, whose failures complete the request. - A MonitoredItem deleted and disposed while a reload was handing it to the replacement NodeManager could be attached anyway. The item now reserves itself for the hand-over and the transition takes it back if it was disposed meanwhile. - The Overflow bit is recorded and applied when the value is published, as the surrounding design does, rather than written into the value at enqueue time. - MonitoredItem cleanup for a Subscription being deleted no longer passes null entries to `DeleteMonitoredItemsAsync`. - Browse continuation points of a retired NodeManager are persisted and disposed outside the Session lock. ## Open review discussions Three threads are open, replied to and awaiting reviewer decisions: separating service-call dispatch from NodeManager handling in `MasterNodeManager` (tracked as #4098), the request-scoping shape in `StandardServer`, and how much of the async MonitoredItem service implementation should stay in `Subscription`. Issue #4102 records a specification ambiguity found while implementing the missing-Node notification: Part 4 §5.8.4.1 makes it mandatory, but the protected over-capacity queue entry §5.13.1.5 defines applies to `EventQueueOverflowEventType` only, so the specification does not say how it survives a full queue. ## Validation - Full `Opc.Ua.Server.Tests` on net10.0: 3,768 passed, 5 skipped. - Lifecycle, MonitoredItem, Subscription and continuation point suites: 185 passed on net10.0 and 75 on net48. - Server builds complete with zero warnings or errors. - Two failures are pre-existing and unrelated: `DurableDataValueQueueVerifyReferenceBatchingAsync` (flaky `BatchPersistor` file contention, passes in isolation on net10.0 and net48) and `ConfigureApplicationBuildsSharedClientAndServerConfigurationAsync` (fails on a clean tree with these changes stashed). ## Related Issues - Fixes #3993 - Follow-up tracked in #4098	2026-07-28 16:06:28 +02:00
Marc Schier	dd6a591ebe	Enforce NodeManagement authorization and rollback (OPC 10000-4/18) (#4046) ... ## Summary - Fixes missing `AddNode`, `DeleteNode`, `AddReference`, and `RemoveReference` authorization before NodeManagement mutations. - Enforces applicable namespace and Node `AccessRestrictions`. - Distinguishes local targets from remote `targetServerUri`, server-index, and namespace-URI targets. - Validates both local reference endpoints and uses the actual reciprocal `NodeClass` for cross-NodeManager mutations. - Adds bounded, cancellation-safe compensation when reciprocal add/delete mutations fail. ## Specification - OPC 10000-4 §§5.8.2-5.8.3 - OPC 10000-18 role-based access control This is split from #4021. ## Tests Focused Release validation passed on both `net10.0` and `net48`: - `dotnet build tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj -c Release -f <TFM> -p:CustomTestTarget=<TFM>` - `dotnet test tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj -c Release -f <TFM> -p:CustomTestTarget=<TFM> --no-build --no-restore --filter FullyQualifiedName~Opc.Ua.Server.Tests.MasterNodeManagerNodeManagementTests` - 55 tests passed per TFM, including `AddNodesDeniedAddNodePermissionDoesNotMutateAsync`, `AddNodesDeniedParentAddReferencePermissionDoesNotMutateAsync`, `DeleteNodesDeniedDeleteNodePermissionDoesNotMutateAsync`, `AddReferencesGrantedPermissionsMutateBothSidesAsync`, `AddReferencesTargetServerUriSkipsLocalTargetProcessingAsync`, `AddReferencesInverseFailureRollsBackSourceAsync`, `AddReferencesCancellationUsesIndependentRollbackToken`, `DeleteReferencesRemoteTargetSkipsReciprocalProcessingAsync`, `DeleteReferencesInverseFailureRestoresSourceAsync`, and `DeleteReferencesUnexpectedFailureRestoresSourceWithIndependentToken`. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>	2026-07-23 09:19:11 +02:00
Marc Schier	15e795bbed	Fix #4061: invalidate component cache on runtime node add/remove (#4068) ... ## Summary Fixes #4061. `AsyncCustomNodeManager` kept its component cache (`m_componentCache`, populated when monitored items / registered nodes resolve through the manager) out of sync with runtime address-space changes: - `RemovePredefinedNodeAsync` (the delete path) never evicted the removed node, so a deleted node stayed resolvable through the cache. - A re-registered / replaced `NodeId` kept pointing at the stale instance. For a dynamic-composition consumer (recompose = delete + re-add) this surfaced as a Browse/Read/Call served a stale, pre-change view — the runtime-added child intermittently missing while the pre-add set (or a removed node) lingered. ## Fix - `RemovePredefinedNodeAsync` force-evicts the removed node from the component cache. - `IndexPredefinedNode` / `ReplacePredefinedNode` refresh the cached instance on re-registration (reference count preserved). - `CreateNodeAsync` / `AddNodeAsync` / `DeleteNodeAsync` (both convenience and service overloads) refresh the parent's cached view after a runtime child add/remove — covering both the runtime and predefined-node registration paths. - `NodeState.AddChild` now sets the `Children` change mask inside the children lock so the mask is published together with the mutation. The component-cache helpers are additive and NativeAOT-safe. The runtime async paths use async waits — `RefreshParentComponentCacheAsync` / `InvalidateComponentCacheAsync` (`await m_componentCacheSemaphore.WaitAsync(cancellationToken)`) — while the genuinely synchronous registration/upgrade paths (`IndexPredefinedNode` via `AddPredefinedNodeSynchronously`, `ReplacePredefinedNode`) keep a synchronous `RefreshComponentCache` that matches the existing synchronous cache helpers on the type. All are `private`. ## Tests - Manager-level regression tests (`AsyncCustomNodeManagerTests.cs`): delete-eviction, replace-refresh, and browse-of-a-runtime-added-child-from-an-already-cached-parent (the reporter's explicitly requested framework coverage). - End-to-end test (`MasterNodeManagerNodeManagementTests.cs`): registers a real `AsyncCustomNodeManager` in a `MasterNodeManager` over the `StandardServer` fixture, caches a parent, runtime-adds a child, and browses through the full master dispatch (Forward / HierarchicalReferences / IncludeSubtypes), asserting the child is visible and then gone after delete. ## Validation - `net10.0` and `net48`: full `AsyncCustomNodeManager` suite + `MasterNodeManagerNodeManagement` suite green, no regressions. ## Docs - Browse-consistency note added to `docs/ModelChangeTracking.md`.	2026-07-22 11:57:07 +02:00
Alexander Köpke	a568a7e54c	Set ContinuationPoint (when browse is finished) to null instead of empty array, align with existing 1.5.xxx behavior (#4057) ... This pull request standardizes the handling of the `ContinuationPoint` property in `BrowseResult` objects, ensuring it is always explicitly set to `null` (or its equivalent) when no continuation point is present. This change improves clarity and consistency in both the implementation and the tests, replacing checks for an "empty" continuation point with checks for a "null" continuation point. **Codebase consistency and correctness:** * All `BrowseResult` objects now explicitly set `ContinuationPoint = default` when no continuation point is to be returned, ensuring consistent initialization. (`src/Opc.Ua.Server/NodeManager/MasterNodeManager.cs`) [[1]](diffhunk://#diff-851e5925c677925c42bd70bce11ea1a75a5f5cbdb810ac851351385e16f54a71L1900-R1904) [[2]](diffhunk://#diff-851e5925c677925c42bd70bce11ea1a75a5f5cbdb810ac851351385e16f54a71L2068-R2076) [[3]](diffhunk://#diff-851e5925c677925c42bd70bce11ea1a75a5f5cbdb810ac851351385e16f54a71L2078-R2090) **Test updates for new semantics:** * All test assertions now use `ContinuationPoint.IsNull` instead of `IsEmpty` to check for the absence of a continuation point, reflecting the new contract. (`tests/Opc.Ua.InformationModel.Tests/BrowseContinuationPointTests.cs`, `tests/Opc.Ua.Server.Tests/NodeManager/MasterNodeManagerDeterministicTests.cs`) [[1]](diffhunk://#diff-904275d6b4bee35e6884f38e0db5cbc955216eaf2aa7f468ba285133470e1596L121-R122) [[2]](diffhunk://#diff-904275d6b4bee35e6884f38e0db5cbc955216eaf2aa7f468ba285133470e1596L394-R394) [[3]](diffhunk://#diff-904275d6b4bee35e6884f38e0db5cbc955216eaf2aa7f468ba285133470e1596L435-R435) [[4]](diffhunk://#diff-904275d6b4bee35e6884f38e0db5cbc955216eaf2aa7f468ba285133470e1596L634-R634) [[5]](diffhunk://#diff-bda1da5dc01533ffe61d1c65b6e968b6462e11a63758ac95ded000ffc885345eL420-R420) * Additional test cases have been added to verify that completed browse operations and error scenarios always return a null continuation point. (`tests/Opc.Ua.Server.Tests/NodeManager/MasterNodeManagerDeterministicTests.cs`) [[1]](diffhunk://#diff-3d9efc81935ec60d7513334833e9eab033925194f5a0d11105668204cc60f54aR203-R230) [[2]](diffhunk://#diff-3d9efc81935ec60d7513334833e9eab033925194f5a0d11105668204cc60f54aR327) [[3]](diffhunk://#diff-3d9efc81935ec60d7513334833e9eab033925194f5a0d11105668204cc60f54aR349)# Description _Describe the changes here to communicate to the maintainers why they should accept this pull request. By default - this will become the Commit message after merging and thus define history._ ## Related Issues _Reference all GitHub issues this PR addresses. If there is no issue yet, open one and link it here._ _If this is a relatively large or complex change, a design must have been discussed in the related tracking issue and signed off (which becomes the Architectural Decision Record (ADR))._ - Fixes #github-issue-number, ... ## Checklist _Put an `x` in the boxes that apply. You can complete these step by step after opening the PR._ - [x] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [ ] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [ ] I have addressed **all** PR feedback received. --------- Co-authored-by: Marc Schier <marcschier@users.noreply.github.com> Co-authored-by: Marc Schier <marcschier@hotmail.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>	2026-07-21 20:54:19 +02:00
romanett	537b10c8b3	Fix History User Access Levels and add CTT coverage nodes (#4026) ... # Description Improve Reference Server coverage for OPC UA Compliance Test Tool scenarios and document the latest CTT findings. ## Reference Server coverage - Historize the configured AccessRights nodes and seed them with the same deterministic mixed-quality history as the other test nodes while preserving their access controls. - Add a historian node that intentionally does not support ServerTimestamp. - Add a SelectionListType String instance whose Selections property is String[] as required by Part 5, with localized descriptions and RestrictToList enforcement. - Add an EUR CurrencyUnit property and verify its structured value and binary encoding. - Add a node with explicit read/write base access bits plus NonatomicRead and NonatomicWrite AccessLevelEx flags. - Ensure the first ByteString array elements meet the CTT minimum-length prerequisite. ## Latest CTT findings - Confirm run-23 A&C residuals are CTT re-entrant Read and branch-unaware Retain checks rather than server regressions. - Confirm NumberOfTransitions includes Uncertain values as required by Part 13. - Document the CTT CurrencyUnit decoder dropping a correctly encoded Exponent. ## Related Issues - Follow-up to #3960 and #4002. ## Checklist - [x] I have signed the [CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf) and read the [CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md) doc. - [x] I have added tests that prove my fix is effective or that my feature works and increased code coverage. - [x] I have added all necessary documentation. - [x] I have verified that my changes do not introduce (new) build or analyzer warnings. - [ ] I ran **all** tests locally using the **UA.slnx** solution against at least .net **framework** and .net **10**, and all passed. - [ ] I fixed **all** failing and flaky tests in the CI pipelines and **all** CodeQL warnings. - [x] I have addressed **all** PR feedback received. Focused affected tests pass on .NET 10 and .NET Framework 4.8. --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: Marc Schier <marcschier@hotmail.com>	2026-07-21 13:52:12 +02:00
MrAlaskan	399747f6a0	fix: don't return continuation points on BadNoContinuationPoints (#4022) ... ### Summary This PR fixes `Browse` and `BrowseNext` so they do not return a usable continuation point when the server reports `BadNoContinuationPoints`, and adds regression tests that cover both code paths. ### Problem According to OPC UA Part 4, if the server cannot allocate another continuation point for a `Browse` or `BrowseNext` operation, the result should be `Bad_NoContinuationPoints`. In that case, the server must not also return a continuation point that the client can continue to use. Previously, `MasterNodeManager.FetchReferencesAsync()` could return `BadNoContinuationPoints` while still passing a live continuation point object back to its callers. `BrowseAsync()` then copied that continuation point into the result, producing a contradictory response with `StatusCode = BadNoContinuationPoints` and a non-empty `ContinuationPoint`. `BrowseNextAsync()` went further and overwrote the error with `Good` whenever a continuation point object was still present. That behavior hides continuation-point quota exhaustion and breaks the expected paging semantics. ### Changes - Dispose and clear the continuation point when `FetchReferencesAsync()` hits the no-continuation-points path. - Only copy a continuation point into `Browse` and `BrowseNext` results when the operation completed successfully. - Add deterministic regression tests that verify both `Browse` and `BrowseNext` return `BadNoContinuationPoints` without a continuation point when the continuation-point quota is exhausted.	2026-07-20 08:02:45 +02:00
Marc Schier	84fa8e8906	CTT follow-up: monitored items, alarms, codecs, history, and model validation (#4002) ... # Description Follow-up to #3978 based on the latest OPC UA CTT aggregate, matrix, Historical Access, Attribute, and Node Management runs. ## Aggregate run 16 - Ignore synthetic `BadBoundNotFound` raw-bound markers when feeding aggregate calculators. - Add direct and live historian regression coverage. ## Multi-dimensional Variant matrices - Fix `Variant.Copy()` so rank-2 Variant matrices preserve their payload and dimensions. - Enforce valid Variant matrix dimensions consistently across Binary, JSON, XML stream, and XML parser codecs. - Encoders return `BadEncodingError`; decoders return `BadDecodingError` for malformed matrix dimensions. - Add cross-codec valid/null/empty/malformed tests and a batched ReferenceServer Read regression. - Correct the previous CTT issue attribution: the invalid `Scalar_Static_Arrays2D_Variant` server encoding poisoned the batched CTT Read. ## Node Management AddNodes - Return `BadNodeIdRejected` for unsupported requested-NodeId namespaces. - Validate hierarchical ReferenceType source/target NodeClass constraints. - Document run-18 confirmation that all remaining 15 AddNodes errors are CTT project/script configuration issues. ## Historical Access and Attribute Services run 18 - Reject whitespace in `NumericRange` syntax with `BadIndexRangeInvalid`. - Add HistoryRead tests for operation-level invalid syntax and per-DataValue `BadIndexRangeNoData`. - Document CTT defects: - `012.js` expects `BadIndexRangeNoData` at the operation level instead of on returned DataValues; - `Err-012.js` uses a non-historizing node for an access-denied test; - generic Attribute array helpers omit NodeId[] and StatusCode[] conversion paths. ## Base Information model validation run 19 - Run the CTT main session as `sysadmin` over Basic256Sha256 SignAndEncrypt so SecurityAdmin RolePermissions and EncryptionRequired restrictions are both satisfied without weakening the server model. - Preserve predefined well-known NodeIds while making generated dynamic type and optional-child factories allocate compatible per-instance NodeIds, remap internal references, and update references from the owning subtree. - Materialize dynamic RoleType properties through generated helpers and keep role-child string NodeIds disjoint from numeric RoleManager root IDs. - Add net48/net10 regressions for generator output, NodeId allocation/reference remapping, DI mandatory children, dynamic roles, and low-privilege versus SecurityAdmin Browse visibility. - Document CTT defects for permission-unaware mandatory-child validation, the UA 1.04 reference model used against a UA 1.05 server, stale ServerDiagnostics cache, and the `ConformanceUnits` scalar/array mismatch. ## Related Issues - Follow-up to #3960 and #3978. ## Checklist - [x] I have signed the CLA and read the CONTRIBUTING document. - [x] Tests prove the fixes and improve coverage. - [x] Required CTT documentation is updated. - [x] Focused builds/tests introduce no warnings. - [x] Affected tests pass on .NET Framework and .NET 10. - [ ] CI and CodeQL are green. - [ ] All PR feedback is addressed. ## Latest CTT full run and A&C run 20 - Fix Monitor Value Change V2 `036.js`: an ambiguous `DataValue(StatusCode)` call encoded `BadIndexRangeNoData` as a Good value. - Prove all 19 configured matrix monitored items notify when the selected value actually changes; document the independent `042.js` script defects. - Rebase dynamic `CertificateExpired` / `TrustListOutOfDate` alarm roots and descendants, restore standard type declarations and ModellingRules, and expose the cross-node-manager references. - Deliver method-triggered events to every authorized Session, fixing the two-Session Confirm scenario. - Preserve locale-only `LocalizedText` values consistently across Binary, JSON, and XML and align Acknowledge/Confirm comment behavior and tests. - Document the remaining proven CTT defects for TransactionDiagnostics, SemanticChange, History `013`, PolicyId scope, A&C, durable subscriptions, and Subscription Minimum events. ## Base synchronization Merged `master` through `007cfaf90` (`#4010`, repository layout consolidation) and retained the matrix regression tests at their new `tests/` locations. ## Latest validation - Focused merged-tree tests pass on net10 and net48. - `Opc.Ua.Server` and `Quickstarts.Servers` Release builds complete with 0 warnings and 0 errors on net10 and net48. - The existing `DisableEnableViaTypeAndInstanceMethodNoEventsDuringDisabledAsync` timing test took its documented inconclusive timeout path after the layout merge; no test failure was reported. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com> Co-authored-by: romanett <romanett98@gmail.com>	2026-07-18 05:01:03 +02:00
Marc Schier	7cec2d614d	Move repository files to the consolidated layout	2026-07-16 06:25:54 +02:00