216 Commits

Author SHA1 Message Date
Marc Schier 55bd944609 WoT: Types-side TD/TM-NodeSet conversion with consolidated corpus and minimal consumer compat (#4758)
# Description

Adds the pure Types-side WoT Thing Description / Thing Model to NodeSet
conversion: resolution, context, declarations, types, values,
localization, URI/format handling, bounded hashing, plus supporting
native XML codec, NodeSet alias/value helpers, RelativePathFormatter and
a JsonElement equality polyfill.

- Carrier-witness fix: a missing native event is accepted only when the
owning preserved type declares it through a `GeneratesEvent` reference
(directly or via its type/supertype chain) AND a bounded, validated
selected EventType carrier identity equals the normalized authored
native target. Native-present events get a full compare; an ambiguous
native key and a missing map stay strict; a readable document is never
archive authority.
- Support-only dependencies: additive per-instance, non-serialized
`WotDocument.IsSupportOnly(kind, name)` (ArgumentNullException guard).
The resolver marks support-only after closure; explicit selection wins;
the View builder excludes only true support-only members, so unit/actsOn
dependencies stay in the JSON. Nested controls cover inner value-only
projection under an outer value-only selection (unit kept, support-only)
versus an outer explicit SelectAll (explicit, not support-only).
- Documentation/XML comments and member-order only in commit 5c368d3a;
no logic change.
- Timeout repair on current head 6957dd46: invocation-scoped
`ArchiveDerivations` reuse removes repeated document-set derivation work
without a global cache (functional files
`WotNodeSetConverter.{Archive,ArchiveDerivations,Partitions,WoT}.cs`,
plus `WotArchiveDerivationsTests` and
`WotDocumentSetSharedValidationTests`). The original local full29
reproduction changed from 27 passed / 2 Refresh timeouts to 29 passed
with unchanged limits; official CI on this head FAILED at three
per-project time ceilings (see the evidence ledger). Temporary RF1
diagnostics were fully removed; the final tree differs from 0f7b9a09
only in the six functional files.
- Test-only net48 compile repair in commit b838907 (earlier head):
official CI on 5c368d3a was RED on the net48 build with CS1061 (see
ledger); the fix adds `using System.Threading;` and an unqualified
`CancellationTokenSource` in one test file. No production change.

Defaults: DI default document budget 256 versus the sample's explicit
1024. Corpus: canonical 540-JSON inventory; the actual manifest is 535
entries = 394 TD + 141 TM (the roles of the other 5 are not claimed).
Native Pumps assertions (9624 nodes / 339 partitions) are unchanged.
2026-10-17 20:43:25 +02:00
Wolfgang Colsman 768b39e1be Server: surface failures to restore durable subscriptions (#4795)
# Description

SubscriptionManager.RestoreSubscriptionsAsync logged and swallowed every
restore failure: a subscription store that threw, a store that reported
an unsuccessful restore, and a stored subscription that could not be
recreated. The server then started without those subscriptions, the
store was told the restore had completed (so it cleaned up what it
held),
and nothing but a log line showed that subscriptions had been lost.

A failed restore now fails the restore, and with it the startup:
- a store that throws fails with BadInternalError and the store's
  exception as the inner exception;
- a store that reports Success = false fails with BadInternalError;
- stored subscriptions that cannot be recreated are collected and
  reported as an AggregateException, before the store is told that the
  restore completed, so the store keeps what it holds.

SubscriptionManager.ContinueOnRestoreFailure (default false) restores
the
previous behaviour for applications that prefer to start without the
subscriptions. Cancellation is no longer swallowed unless that option is
set.

The Quickstarts durable subscription store reported Success = false when
it had nothing stored; it now reports a successful restore of no
subscriptions, and keeps reporting a failure when its file cannot be
read.

## Related Issues

None.

## 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.
- [x] 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>
Co-authored-by: Marc Schier <marcschier@users.noreply.github.com>
2026-10-17 20:40:45 +02:00
Marc Schier 7fb986bd0d Add recycling operator console and sample container images (#4810)
# Description

Add a local browser-based operator console for the synthetic recycling
line, using direct, encrypted OPC UA connections and the existing typed
coordination interface.

- Extract a sample-local, non-packable `Recycling.Client` library shared
by the server and console. Preserve the model XML bytes, namespace/type
identifiers, resource identity, wire format and journal schema; the
server retains its .NET 8/9/10 targets.
- Add a .NET 10 ASP.NET Core workstation host with bounded SSE
state/trend delivery, native companion inspection, paged
material/genealogy reads, and role-limited coordinator commands. Exact
command envelopes are retained for explicit retries; uncertain outcomes
are not automatically reissued.
- Add the operator interface using local HTML/SVG, CSS and JavaScript
modules: ten process groups, substep inspection, faults/constraints,
persistent quality holds, trends, material tracing and simulator
administration. Show raw quality/provenance and handle stale data, run
changes, browser expiry and large identifiers explicitly. No
browser-generated plant telemetry or frontend framework/npm build is
introduced.
- Keep application/user credentials in external certificate stores. Use
strict X.509 trust, signed/encrypted UA sessions, local browser
bootstrap sessions, same-origin/CSRF checks, and a conservative
configured control ceiling. This is a local synthetic sample, not a
physical emergency-stop or shared remote-user system.
- Register `recyclingserver` and `recyclingclient` in the existing
Images CI matrix, using source/prebuilt Dockerfile stages and the
existing portable-IL/multiarchitecture packaging flow. Add an optional
loopback-published Compose console service. No new schedules or NuGet
publication entries are added.
- Add managed, real-UA, Chromium, NativeAOT and image-contract
qualification, with Microsoft.Playwright as a test-only centrally
managed dependency, and update usage/deployment documentation.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
2026-10-17 16:16:29 +02:00
Marc Schier 7e25e1a3d7 Extract remaining shared companion, rendering and packaging changes (#4806)
# Description

The shared AI deployment contracts and instance registration; DI
software-upload outcomes, digest handling and simulator; bounded
Positioning/Pumps reads; PubSub raw-data/matrix and security-provider
handling; Vision read-quality contracts; xRegistry resource writes and
instance projection; OpenUSD authoring, embedded viewport and
retained-frame capture APIs; standalone sample CLI controls; and the
generic Debug/RID package-policy and fork/Dependabot coverage-comment
fixes. The Linux native prerequisite step is retained for **Vision tests
only**.

## Related Issues

- Related tracking issue:
[#4461](https://github.com/OPCFoundation/UA-.NETStandard/issues/4461),
without automatic closure.
- Source work:
[#4462](https://github.com/OPCFoundation/UA-.NETStandard/pull/4462),
which remains intact for the coordinator's later integration.
- Immediate stacked predecessor:
[#4804](https://github.com/OPCFoundation/UA-.NETStandard/pull/4804).

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
- [ ] 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.
2026-10-17 07:52:02 +02:00
Wolfgang Colsman 4e77ba3f84 Redundancy: snapshot and restore for RaftSharedKeyValueStore (#4794)
# Description

RaftSharedKeyValueStore applies every committed command but offers no
way
to capture its state. An application that wants to bound the Raft log
cannot snapshot the store before compacting its consensus log, and after
a
restart it cannot restore the state without replaying the whole log.

Add CreateSnapshotAsync, which commits a barrier through the consensus
and
encodes the state in a versioned format, and RestoreSnapshot, which
replaces the state before the store starts applying the log. A malformed
snapshot raises FormatException; restoring after start raises
InvalidOperationException.

Tests: RaftSharedKeyValueStoreSnapshotTests (round trip, log applied
after
restore, restore after start rejected, corrupt snapshot rejected).

## Related Issues

None.

## 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.
- [x] 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>
Co-authored-by: Marc Schier <marcschier@users.noreply.github.com>
2026-10-16 20:10:13 +02:00
Marc Schier b1c0cd20fd Fix classic browse-path subscription restoration (#4814)
# Description

Persisted classic subscriptions retain their server/client handles but
previously lost relative-path resolution metadata. Transfer could
succeed, yet a later `ApplyChangesAsync` attempted to resolve an
already-created item and failed. The SDK now owns this restoration
lifecycle without exposing a public resolution-state setter.

- Preserve the originally monitored target in internal snapshot state
and restore both `ResolvedNodeId` and `Status.NodeId`.
Transfer/reactivation use handles without re-browsing; fresh creation
resolves paths again.
- Version classic subscription/configuration files and read existing
unversioned 2.0 files using frozen legacy wire layouts. Legacy missing
targets remain unknown rather than being guessed.
- Exclude existing items from creation-time resolution, reserve creation
before asynchronous translation, and reject stale translation results.
Failed deletion retains identity and pending retry state.
- Support forward-only snapshot input using position tracking and
bounded, per-ExtensionObject buffering in the binary decoder, including
short reads. No whole-file buffering or reflection-based serialization
is introduced.
- Add unit/integration regressions and document the supported lifecycle
and migration implications.

**Compatibility:** Newly written files require the updated SDK. Existing
2.0 files remain readable. Assigning a different `StartNodeId` or
`RelativePath` to a created/in-flight item now immediately throws
`BadInvalidState`; unchanged assignments remain allowed. No V2
subscription-engine changes or 1.5 XML import are included.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
2026-10-16 20:06:51 +02:00
Marc Schier 87012a147f Machinery: add bounded inspection and result transfers (#4804)
# Description

- Add opt-in bounded browsing and strict reads with original source,
status, timestamp, and structured-value evidence. Preserve the existing
tolerant constructors and convenience projections, and wire options
through session extensions, factories, and hosting registration.
- Add selected-result streaming downloads with byte/request limits and
independent cleanup, using `TemporaryFileTransferClient.CopyToAsync`
from the client/server predecessor. Retain the detailed transfer
regressions in the Machinery test layer.
- Expose genuinely null unpublished result slots, carry the two
Machinery sample updates, and include the complete Machinery guide and
package README changes.

## Related Issues

- Related tracking issue: #4461; this extraction does not close it.
- Frozen source PR: #4462; this extraction does not close or modify it.
- Immediate predecessor: #4803 (`marcschier-extract-amb-changes`). The
earlier dependencies are client/server #4802 and core/types #4801.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
2026-10-16 12:24:35 +02:00
Marc Schier 8772f37275 Fix recycling scenario defaults and MCP interoperability (#4808)
# Description

Fix five failures reproduced while exercising the recycling sample
through a locally built OPC UA MCP server:

- Support Certificate authentication through named, host-approved X.509
identity selectors and the existing certificate/identity providers. Tool
arguments cannot supply private keys or arbitrary certificate-store
paths.
- Register custom enumeration dependencies from the validated, bounded
type snapshot before loading requested structure roots.
- Preserve structured fields and opaque encoded bodies in generic
read/call results using the selected session's UA codecs.
- Add bounded, explicitly typed UA JSON method arguments while retaining
the existing string argument behavior and C# overloads.
- Preserve omitted defaults in sparse recycling scenario JSON; explicit
invalid values and unknown members still fail validation. All six
shipped scenario files are covered by regressions.

Update the MCP and recycling documentation. This PR contains one fix
commit on a feature branch in **OPCFoundation/UA-.NETStandard**, based
directly on upstream `master` at `95850b7e5`. No local registration,
certificates, scenario journals or live-test artifacts are included.

### Validation

**Final commit `d199feba0`: 216 affected MCP tests and 16 recycling
CLI/scenario tests passed on .NET 10**, with no failures, fixture
setup/teardown errors or build/analyzer warnings. The repository's TRX
verdict helper accepted both reports.

**Draft: the full-solution gate is not green.** The .NET 10 solution run
encountered an `Opc.Ua.OneFuzz.Validator.Tests` fixture-publication
failure outside the files changed by this PR: `MSB3030`, missing
`Opc.Ua.OneFuzz.TestDependency.runtimeconfig.json`. It affected 210
tests; the run was stopped rather than expanding this PR into unrelated
OneFuzz work. The full .NET Framework 4.8 solution suite was not run.

Before the final rebase, the complete managed recycling suite passed
**117**, and the CLI/scenario tests passed **16 each on .NET 8 and .NET
9**, with no failures or fixture teardown errors. The five explicit
NativeAOT smoke cases were not selected.

Actual live qualification used one coordinator and all ten independent
process servers with strict certificate trust. Healthy, combined-fault
and zero-utility runs each produced 24 complete packages with exact
component conservation. Also exercised native companion discovery,
subscriptions, authorization, pause/step/enable/disable, durable request
replay, quality holds, reset and coordinator crash recovery. NativeAOT
executables, container deployment and parity against a complete external
producer contract were not qualified.

<details>
<summary>Exact validation commands and results</summary>

Commands ran from the repository root with an isolated .NET SDK
10.0.401. `$root` denotes the private validation-artifact directory; no
machine-specific path or key material is included here.

Affected MCP matrix, final commit — **passed: 216; failed: 0; skipped:
0**:

```powershell
dotnet test tests\Opc.Ua.Tools.Tests\Opc.Ua.Tools.Tests.csproj -c Release -f net10.0 -p:CustomTestTarget=net10.0 -p:CustomTargetFrameworks=net10.0 -p:UseSharedCompilation=false -m:1 -nr:false --no-restore --nologo -v:quiet --filter 'FullyQualifiedName~SchemaRemoteTests|FullyQualifiedName~OpcUaJsonHelperTests|FullyQualifiedName~MethodServiceToolsTests|FullyQualifiedName~ConvenienceToolsTests|FullyQualifiedName~AttributeServiceToolsTests|FullyQualifiedName~ViewServiceToolsTests|FullyQualifiedName~OpcUaSessionManagerTests|FullyQualifiedName~ConnectionToolsTests|FullyQualifiedName~McpHostBuilderTests|FullyQualifiedName~ConfigurationToolsTests' --logger 'trx;LogFileName=mcp-pr.trx' --results-directory "$root\pr-validation\focused"
```

.NET 10 CLI/scenario regressions, final commit — **passed: 16; failed:
0; skipped: 0**:

```powershell
dotnet test tests\Opc.Ua.Recycling.Samples.Tests\Opc.Ua.Recycling.Samples.Tests.csproj -c Release -f net10.0 -p:CustomTestTarget=net10.0 -p:CustomTargetFrameworks=net10.0 -p:UseSharedCompilation=false -m:1 -nr:false --no-restore --nologo -v:quiet --filter 'FullyQualifiedName~RecyclingCommandLineTests' --logger 'trx;LogFileName=recycling-cli-pr.trx' --results-directory "$root\pr-validation\focused"
```

Complete managed recycling suite, before rebase — **passed: 117; failed:
0; skipped: 0** (five explicit NativeAOT cases not selected):

```powershell
dotnet test tests\Opc.Ua.Recycling.Samples.Tests\Opc.Ua.Recycling.Samples.Tests.csproj -c Release -f net10.0 -p:CustomTestTarget=net10.0 -p:CustomTargetFrameworks=net10.0 -p:UseSharedCompilation=false -m:1 -nr:false --no-restore --nologo -v:quiet --logger 'trx;LogFileName=recycling-final.trx' --results-directory (Join-Path $root 'results')
```

.NET 8 CLI/scenario regressions, before rebase — **passed: 16; failed:
0; skipped: 0**:

```powershell
dotnet test tests\Opc.Ua.Recycling.Samples.Tests\Opc.Ua.Recycling.Samples.Tests.csproj -c Release -f net8.0 -p:CustomTestTarget=net8.0 -p:CustomTargetFrameworks=net8.0 -p:UseSharedCompilation=false -m:1 -nr:false --nologo -v:quiet --filter 'FullyQualifiedName~RecyclingCommandLineTests' --logger 'trx;LogFileName=recycling-cli-net8.trx' --results-directory "$root\results"
```

.NET 9 CLI/scenario regressions, before rebase — **passed: 16; failed:
0; skipped: 0**:

```powershell
dotnet test tests\Opc.Ua.Recycling.Samples.Tests\Opc.Ua.Recycling.Samples.Tests.csproj -c Release -f net9.0 -p:CustomTestTarget=net9.0 -p:CustomTargetFrameworks=net9.0 -p:UseSharedCompilation=false -m:1 -nr:false --nologo -v:quiet --filter 'FullyQualifiedName~RecyclingCommandLineTests' --logger 'trx;LogFileName=recycling-cli-net9.trx' --results-directory "$root\results"
```

Full .NET 10 solution — **not passed**: stopped after the OneFuzz
fixture failure above; incomplete solution run, not a clean validation
result:

```powershell
dotnet test UA.slnx -c Release -p:CustomTestTarget=net10.0 -p:CustomTargetFrameworks=net10.0 -p:UseSharedCompilation=false -m:1 -nr:false --nologo -v:quiet --logger trx --results-directory "$root\pr-validation\net10"
```

</details>

## Related Issues

Follow-up to
[#4772](https://github.com/OPCFoundation/UA-.NETStandard/pull/4772),
which introduced the recycling sample. No separate tracking issue is
currently linked. These fixes preserve the existing architecture and
address failures reproduced during live qualification.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.

Regression tests were added and passed as recorded above; aggregate
coverage was not collected, so the combined coverage checklist item
remains unchecked.

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: marcschier <11168470+marcschier@users.noreply.github.com>
2026-10-16 11:41:51 +02:00
Marc Schier b3c1e60f46 AMB: add bounded strict reads and configurable sample hosting (#4803)
# Description

Extract the AMB layer from #4462 onto the client/server predecessor
#4802, then address the four review findings in
`6428686ae45724510bd6bd00619f4992f3d36e46`.

The initial extraction (`95b0caa1ac30d1fdacaf7a780f19c5f97e6fd02d`)
contained exactly 19 paths: 12 AMB client files, four AMB test files,
two sample entry points and `docs/AMB.md`. Its code/tests matched the
frozen source
`5b03e9afa492cdb36049ee52ae844f630f89d8db...390c4a7a51b71da40caec2d22ef74518bbe670ce`;
only the two agreed UaLens-only documentation passages were omitted. The
review follow-up intentionally changes that extracted implementation and
adds the related factory/registration tests and package documentation.
No UaLens, Machinery, Pumps, Positioning, native-rendering, build or CI
changes are introduced by this layer.

The AMB client provides opt-in bounded traversal, strict response/type
validation and original `AssetReadValue` evidence while preserving
tolerant defaults. The samples expose validated host, port, PKI root,
certificate auto-accept and bounded-runtime options, with unchanged
standalone defaults.

The review corrections are:

- Accept header-validated empty BrowseNext release responses required by
Part 4 §5.9.3.2, as well as the stack's single-result response. Invalid
cleanup results still preserve the original failure.
- Keep event observation tolerant of denied/limited maintenance-class
discovery without caching incomplete classes. Subsequent strict reads
retry discovery and still report errors.
- Accept typed-null ExtensionObjects only in the nullable
structure-field checks, preserving original evidence without weakening
scalar validation.
- Pass optional immutable limits through `AddAssetManagementClient`, the
registered factory/delegate and directly constructed factories. Preserve
existing overloads and tolerant behavior when options are omitted;
reject invalid limits before opening a session.

### Review regression evidence

| Requirement | Evidence |
| --- | --- |
| Accept empty cleanup responses without masking cancellation or limits
| `OneBeyondReferenceLimitReleasesAcquiredContinuationAsync` and
`CancellationWhileAwaitingNextReleasesTheSubmittedContinuationAsync`,
each with empty and single-result responses; malformed responses remain
covered |
| Preserve observation fallback and do not cache incomplete classes |
`ObservationFallsBackWithoutCachingIncompleteClassesAsync`: both
observation APIs, denied browsing and exhausted budget, correct
filter/event evidence, and a subsequent strict rediscovery |
| Preserve typed-null structure evidence without weakening scalar checks
| `ContextAndEntryReadsKeepSourceAndNullStructureEvidenceAsync`,
`MaintenanceTypedNullStructuresKeepOriginalEvidenceAsync`,
`ScalarHealthRejectsTypedNullStructuresAsync`, plus
wrong-non-null-structure rejection tests |
| Apply configured hosted limits while retaining tolerant defaults |
`HostedClientOptionsReachClientsAsync`: registered factory, registered
delegate and direct factory, singleton and builder registration, actual
one-reference limit and read evidence;
`InvalidHostedLimitsAreRejectedBeforeOpeningASession` |

### Validation

All commands below ran in this layer's worktree with the existing pinned
.NET SDK 10.0.401. No SDK installation, global.json change,
registry/path-policy change, test suppression or analyzer suppression
was made. The short owned NUnit directory `D:\a61r` and its generated
certificates/state were removed afterward.

**Latest full AMB suite: Passed: 285, Failed: 0, Skipped: 0 on each
framework.** Both builds emitted no compiler/analyzer diagnostics. TRX
files confirm the regression cases executed on both TFMs.

```powershell
& 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe' test 'tests\Opc.Ua.AMB.Tests\Opc.Ua.AMB.Tests.csproj' --no-restore --configuration Release --framework net10.0 -p:CustomTestTarget=net10.0 --nologo --verbosity minimal --logger 'trx;LogFileName=amb-feedback-net10.trx' --results-directory 'C:\Users\mschier\.copilot\session-state\61d7ed73-c89e-406a-a049-1d8ba9681308\files\TestResults\feedback-net10' -- 'NUnit.WorkDirectory=D:\a61r'
& 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe' test 'tests\Opc.Ua.AMB.Tests\Opc.Ua.AMB.Tests.csproj' --configuration Release --framework net48 -p:CustomTestTarget=net48 --nologo --verbosity minimal --logger 'trx;LogFileName=amb-feedback-net48.trx' --results-directory 'C:\Users\mschier\.copilot\session-state\61d7ed73-c89e-406a-a049-1d8ba9681308\files\TestResults\feedback-net48' -- 'NUnit.WorkDirectory=D:\a61r'
```

**Focused regression run: Passed: 127, Failed: 0, Skipped: 0.** Before
the production fixes, the focused repro executed 112 cases with 16
failures reproducing all four reported defects. Additional
registration/validation cases were included in the final run.

```powershell
& 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe' test 'tests\Opc.Ua.AMB.Tests\Opc.Ua.AMB.Tests.csproj' --no-restore --configuration Release --framework net10.0 -p:CustomTestTarget=net10.0 --nologo --verbosity minimal --filter 'FullyQualifiedName~AmbBoundedClientTests|FullyQualifiedName~AmbClientTests|FullyQualifiedName~HostedClientOptionsReachClientsAsync' --logger 'trx;LogFileName=amb-feedback-focused.trx' --results-directory 'C:\Users\mschier\.copilot\session-state\61d7ed73-c89e-406a-a049-1d8ba9681308\files\TestResults\feedback-focused' -- 'NUnit.WorkDirectory=D:\a61r'
```

**Whitespace and newly introduced style findings: passed.** `git diff
--check` and the following commands exited 0:

```powershell
& 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe' format whitespace --folder --verify-no-changes --verbosity quiet --include 'src\Opc.Ua.AMB.Client\AmbClient.Bounds.cs' 'src\Opc.Ua.AMB.Client\AmbClient.Health.cs' 'src\Opc.Ua.AMB.Client\AmbClient.Structure.cs' 'src\Opc.Ua.AMB.Client\AmbClient.Values.cs' 'src\Opc.Ua.AMB.Client\AmbClientFactory.cs' 'src\Opc.Ua.AMB.Client\Hosting\OpcUaAmbClientBuilderExtensions.cs' 'tests\Opc.Ua.AMB.Tests\AmbBoundedClientTests.cs' 'tests\Opc.Ua.AMB.Tests\AmbBoundedClientTests.Traversal.cs' 'tests\Opc.Ua.AMB.Tests\AmbBoundedClientTests.Values.cs' 'tests\Opc.Ua.AMB.Tests\AmbClientServerE2eTests.cs' 'tests\Opc.Ua.AMB.Tests\AmbClientTests.cs'
$env:CustomTestTarget = 'net10.0'
$env:Configuration = 'Release'
& 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe' format style 'tests\Opc.Ua.AMB.Tests\Opc.Ua.AMB.Tests.csproj' --no-restore --verify-no-changes --severity info --diagnostics IDE0039 --verbosity quiet --include 'tests\Opc.Ua.AMB.Tests\AmbClientServerE2eTests.cs' 'tests\Opc.Ua.AMB.Tests\AmbClientTests.cs'
```

The broader formatter check was **not clean**. It reported pre-existing
informational suggestions and design-time `NUnit1003` diagnostics for
generated browse-name constants, including pre-existing test cases.
Those diagnostics do not occur in the actual builds, which compile and
execute those cases successfully. Two new local-function suggestions
were corrected and rechecked above; no unrelated baseline cleanup or
suppression was included.

```powershell
$env:CustomTestTarget = 'net10.0'
& 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe' format 'tests\Opc.Ua.AMB.Tests\Opc.Ua.AMB.Tests.csproj' --no-restore --verify-no-changes --severity info --verbosity quiet --include 'src\Opc.Ua.AMB.Client\AmbClient.Bounds.cs' 'src\Opc.Ua.AMB.Client\AmbClient.Health.cs' 'src\Opc.Ua.AMB.Client\AmbClient.Structure.cs' 'src\Opc.Ua.AMB.Client\AmbClient.Values.cs' 'src\Opc.Ua.AMB.Client\AmbClientFactory.cs' 'src\Opc.Ua.AMB.Client\Hosting\OpcUaAmbClientBuilderExtensions.cs' 'tests\Opc.Ua.AMB.Tests\AmbBoundedClientTests.cs' 'tests\Opc.Ua.AMB.Tests\AmbBoundedClientTests.Traversal.cs' 'tests\Opc.Ua.AMB.Tests\AmbBoundedClientTests.Values.cs' 'tests\Opc.Ua.AMB.Tests\AmbClientServerE2eTests.cs' 'tests\Opc.Ua.AMB.Tests\AmbClientTests.cs'
```

<details>
<summary>Initial extraction validation and environment history</summary>

The original extraction passed all 263 AMB tests on both TFMs. Its
initial net48 run had one unchanged maintenance-test server-start
timeout; shortening only NUnit.WorkDirectory resolved it, consistent
with certificate-store path lengths. This follow-up used a short
directory from the start and all 285 cases passed on both frameworks.

A no-restore test invocation during the follow-up initially executed no
tests; it was not counted as passing evidence. A no-restore build
identified `NETSDK1005` (missing net10.0 target assets after switching
TFMs). The normal test invocation restored the target assets. Initial
regression-test compilation issues were corrected before capturing the
16 failing behavioral cases.

Both samples were built during extraction on both TFMs; each command
below passed with 0 warnings and 0 errors. They were not rebuilt during
this review follow-up, which does not modify the samples.

```powershell
& 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe' build 'samples\AMB\AmbClient\AmbClient.csproj' --configuration Release --framework net10.0 -p:CustomTestTarget=net10.0 --nologo --verbosity quiet
& 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe' build 'samples\AMB\AmbServer\AmbServer.csproj' --configuration Release --framework net10.0 -p:CustomTestTarget=net10.0 --nologo --verbosity quiet
& 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe' build 'samples\AMB\AmbClient\AmbClient.csproj' --configuration Release --framework net48 -p:CustomTestTarget=net48 --nologo --verbosity quiet
& 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe' build 'samples\AMB\AmbServer\AmbServer.csproj' --configuration Release --framework net48 -p:CustomTestTarget=net48 --nologo --verbosity quiet
```

</details>

This remains a draft: the complete `UA.slnx` net48/net10.0 matrix,
coverage, CI/CodeQL and CLA status are not established by this focused
validation. No coverage increase or complete-solution pass is claimed.
The feedback commit is based on the original AMB extraction; integration
of later lower-layer updates is coordinated separately, without
rewriting this branch or native stack 4807.

## Related Issues

- References #4461, the existing tracking issue; this PR does not close
it.
- Extracted from #4462 at frozen head
`390c4a7a51b71da40caec2d22ef74518bbe670ce`; the source PR is not closed
by this PR.
- Immediate predecessor: #4802 (`marcschier-extract-client-and-server`),
above core/types #4801. The original extraction parent was
`86ff10d3994f132f7343a929abdae209bc2e69b7`.

This is an isolated extraction and review correction of the existing
tracked implementation, not a claim of new architectural sign-off.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
- [x] I have addressed **all** PR feedback received.
2026-10-15 21:08:24 +02:00
Marc Schier 1f6700c30b Fail closed when reconnect cannot preserve endpoint security (#4809)
# Description

It was reported that endpoint refresh during reconnect
(`UpdateBeforeConnect` / reconnect endpoint update) could silently
change a connection's security configuration (e.g. from `SignAndEncrypt`
to a different mode/policy) without the application knowing.

Investigation showed the hard downgrade paths had already been fixed,
but the legacy `SessionReconnectHandler` still had a composite-score
fallback that could select a *different* security mode/policy when the
original combination was no longer offered by the (unauthenticated)
discovery reply. A stronger mode could offset a weaker or deprecated
policy in that score. Managed failover/alternate-network endpoints also
had no explicit mode/policy guard.

Changes:
- **`SessionReconnectHandler`**: removed `SelectFallbackEndpoint` and
the alternate-policy fallback. If the exact mode/policy is unavailable,
reconnect fails (logged as an error) instead of changing security.
- **`ManagedSession`**: added a mode/policy mismatch check; mismatched
alternate-network endpoints, reactivation targets and
failover/recreation targets are rejected with `BadSecurityModeRejected`
/ `BadSecurityPolicyRejected` before a channel is opened.
- Endpoint refresh for **certificate rotation is retained**; new server
certificates are still subject to normal trust validation.
- **Docs** (`docs/Sessions.md`): documents exact mode/policy
preservation during recovery and that `UpdateBeforeConnect` does not
authorize security negotiation. Changing policy requires explicit
reconfiguration and a new connection.
- **Tests**: replaced fallback-selection tests with a fail-closed legacy
reconnect test; added managed alternate-endpoint policy mismatch and
failover mode mismatch tests.

Validation:
- `dotnet test tests/Opc.Ua.Client.Tests/Opc.Ua.Client.Tests.csproj -f
net10.0 --filter
"FullyQualifiedName~SessionReconnectHandlerTests|FullyQualifiedName~ManagedSessionTests"`
— passed (48/48)
- `dotnet test tests/Opc.Ua.Core.Tests/Opc.Ua.Core.Tests.csproj -f
net10.0 --filter "FullyQualifiedName~ConfiguredEndpointTests"` — passed
(46/46)
- Full UA.slnx suite and net48 tests: not run locally.

## Related Issues

- Reported security concern: reconnect endpoint refresh could change the
session's security configuration without notifying the application.

## 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.
- [ ] I have addressed **all** PR feedback received.

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-10-15 20:33:35 +02:00
Marc Schier e78d36ce4b Client/server transfer, WSS, and hosting fixes (#4802)
# Description

Layer 2 of the upstream non-UaLens extraction, with core/types
prerequisite #4801 (`marcschier-extract-core-and-types`). The initial
extraction commit `86ff10d3994f132f7343a929abdae209bc2e69b7` started
from `8881e096fb5e4eaa36f3c13f8caa57733373bd19` and copied exactly 13
client/server paths from #4462 at frozen head
`390c4a7a51b71da40caec2d22ef74518bbe670ce`, using its original base
`5b03e9afa492cdb36049ee52ae844f630f89d8db`. Those initial blobs were
source-identical; the core/types layer was not duplicated or rewritten.

- Add bounded temporary-file copying with byte/request limits, session
ownership checks, and independent bounded cleanup.
- Refresh revised monitored-item parameters after snapshot transfer and
notify the target handler after successful handle synchronization.
- Apply WSS opening deadlines while preserving caller cancellation, and
cover the wire envelope and request timeout behavior.
- Make hosted server presets honor role configuration without replacing
an explicitly registered role manager; include the corresponding tests
and documentation.

**Review follow-up:** commit `a5c8fe0884ad3346106529deba71d93c5df20a9a`
intentionally corrects three defects in the extracted bounded-copy
implementation. It captures one `SessionRequestContext` for managed
transfers, calls the standard `FileType.Close` declaration without
metadata discovery, and retains valid generation handles before
rejecting non-Good status or malformed metadata. Read/Close remain
strictly validated, and transfer/cleanup failures remain independently
visible. The follow-up also adds 21 direct-client regression cases and
updates `docs/FileSystemClient.md`, bringing this PR to 15 changed
paths. The current bounded-copy implementation is therefore
intentionally no longer identical to the frozen source.

No UaLens projects/UI, AMB or Machinery implementations, samples,
CI/native renderer changes, release changes, or generic infrastructure
files are included. The follow-up does not merge/rebase a lower or upper
stack layer.

**Current review-fix validation:** normal analyzers and
warnings-as-errors remained enabled, using the existing SDK **10.0.401**
without changing `global.json`, installing an SDK, or adding
suppressions. The final file-system and session-context selection passed
**241 tests on net10.0 and 241 tests on net48**, with **0 failed and 0
skipped** on each. Both selections include all 21 new regressions.
Before the production fix, the first 20-case regression suite had 13
failures and 7 passes, reproducing the lost cleanup, cancellation,
session-recreation and Close-discovery defects. An additional
deterministic recovery-gate race case was then added and passed on both
frameworks. Informational-severity formatting/style/analyzer checks
passed for the changed C# files.

| Review requirement | Direct regression evidence |
| --- | --- |
| Pin the managed generation through copying and cleanup |
`CopyRejectsRecreatedManagedGenerationAsync`,
`CopyRejectsRecoveryBetweenGenerationAndReadDispatchAsync` |
| Preserve a generation response that returns after cancellation |
`ManagedCopyClosesHandleReturnedAfterCancellationAsync` with immediate
and delayed responses through a real managed transport lease |
| Do not spend the Close deadline discovering metadata |
`CopyUsesDeclarationCloseWithoutDiscoveryAsync` for ordinary and managed
sessions |
| Retain valid handles before rejecting generation status/metadata |
`CopyClosesHandleBeforeRejectingGenerationStatusAsync`,
`CopyClosesHandleFromMalformedGenerationResponseAsync` |
| Preserve error semantics and strict Read/Close validation |
`CopyRejectsGenerationWithoutInventingHandleAsync`,
`CopyPreservesGenerationAndCleanupFailuresAsync`,
`CopyKeepsReadAndCloseStatusValidationAsync` |

<details>
<summary>Exact review-fix validation commands and results</summary>

Commands ran from this layer's repository root. The following variables
expand the actual executable, filters and results paths. Console logs
and TRX reports were retained in the session artifacts.

```powershell
$dotnet = 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe'
$env:DOTNET_ROOT = 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk'
$env:DOTNET_ROOT_X64 = $env:DOTNET_ROOT
$env:DOTNET_CLI_TELEMETRY_OPTOUT = '1'
$client = 'tests\Opc.Ua.Client.Tests\Opc.Ua.Client.Tests.csproj'
$filter = 'FullyQualifiedName~Opc.Ua.Client.Tests.FileSystem|FullyQualifiedName~Opc.Ua.Client.Tests.SessionContexts'
$r10 = 'C:\Users\mschier\.copilot\session-state\9b51b89f-b5ed-4ed7-a097-cca67efe7b0e\files\feedback-net10'
$r48 = 'C:\Users\mschier\.copilot\session-state\9b51b89f-b5ed-4ed7-a097-cca67efe7b0e\files\feedback-net48'

# Before modifying production code, after the new tests compiled:
& $dotnet test $client --no-restore -c Release -f net10.0 -p:CustomTestTarget=net10.0 --filter 'FullyQualifiedName~TemporaryFileTransferClientBoundedReadTests' --logger 'trx;LogFileName=bounded-copy-feedback-red.trx' --results-directory $r10 --verbosity quiet
# Expected regression failure: Passed: 7, Failed: 13, Skipped: 0.

# After the production fix, before adding the explicit queued-recovery case:
& $dotnet test $client --no-restore -c Release -f net10.0 -p:CustomTestTarget=net10.0 --filter 'FullyQualifiedName~TemporaryFileTransferClientBoundedReadTests' --logger 'trx;LogFileName=bounded-copy-feedback-green.trx' --results-directory $r10 --verbosity quiet
# Passed: 20, Failed: 0, Skipped: 0.

# Final complete affected selections, including all 21 new cases:
& $dotnet test $client --no-restore -c Release -f net48 -p:CustomTestTarget=net48 --filter $filter --logger 'trx;LogFileName=file-system-context-feedback-final.trx' --results-directory $r48 --verbosity quiet
# Passed: 241, Failed: 0, Skipped: 0.

& $dotnet test $client -c Release -f net10.0 -p:CustomTestTarget=net10.0 --filter $filter --logger 'trx;LogFileName=file-system-context-feedback-final.trx' --results-directory $r10 --verbosity quiet
# Passed: 241, Failed: 0, Skipped: 0.

$sourceFile = 'D:\git\copilot-worktrees\UA-wot-d3-final\marcschier-improved-invention\src\Opc.Ua.Client\FileSystem\TemporaryFileTransferClient.BoundedRead.cs'
$testFile = 'D:\git\copilot-worktrees\UA-wot-d3-final\marcschier-improved-invention\tests\Opc.Ua.Client.Tests\FileSystem\TemporaryFileTransferClientBoundedReadTests.cs'
$env:CustomTestTarget = 'net48'
& $dotnet format 'src\Opc.Ua.Client\Opc.Ua.Client.csproj' --include $sourceFile --no-restore --verify-no-changes --severity info --verbosity quiet
# Passed, exit 0.
$env:CustomTestTarget = 'net10.0'
& $dotnet format $client --include $testFile --no-restore --verify-no-changes --severity info --verbosity quiet
# Passed, exit 0.

git diff --check
# Passed. CRLF, final newlines and the 120-column C# limit were also checked.
```

Initial no-restore test attempts after switching frameworks exited
without executing tests and were not counted as passes. Diagnostic
`dotnet build ... --no-restore` runs reported `NETSDK1005` for the
missing framework assets; normal restore was then allowed.
Test-authoring compile errors were corrected before recording the red
run, without suppressions. Intermediate broader selections passed
240/240 on each framework before the queued-recovery case increased the
final count to 241.

</details>

**Initial-extraction validation (commit
`86ff10d3994f132f7343a929abdae209bc2e69b7`):** these results are
historical, not a claim that the broader initial selections were rerun
after the review fix. The server test assembly was built as a dependency
of the client project before its `--no-build` runs.

| Initial targeted scope | net10.0 | net48 |
| --- | --- | --- |
| Client subscriptions and file system | Passed: 546, Failed: 0,
Skipped: 0 | Passed: 542, Failed: 0, Skipped: 0 |
| Hosted roles, identity, composition, fluent APIs and builder coverage
| Passed: 164, Failed: 0, Skipped: 0 | Passed: 164, Failed: 0, Skipped:
0 |
| WebAPI WSS transport | Passed: 37, Failed: 0, Skipped: 0 | Not
supported: the repository excludes this .NET 8+ test project on net48 |
| V2 transfer and snapshot integration | Passed: 6, Failed: 0, Skipped:
0 | Passed: 6, Failed: 0, Skipped: 0 |

The first broader net48 hosting run had **9 startup timeouts and
certificate leaks** (155 passed). A single startup case reproduced the
failure. With only a shorter `NUnit.WorkDirectory`, the isolated case
and then all 164 hosting cases passed, with certificate leak tracking
enabled and no teardown leaks. This is consistent with the fixture's
documented .NET Framework PKI path-length constraint; no source or
diagnostic suppression was changed. Both failed runs and successful
reruns are recorded below.

**Deferred coverage:** the broader domain-level
`MachineryResultTransferTests*.cs` fixtures remain in Machinery layer
#4804. They were not imported or run here. This review follow-up adds
direct-client coverage for the three defects instead. The Machinery
owner has been informed that the old expectations for failed Close
discovery and zero cleanup after a returned non-Good generation response
must be reconciled when the lower fixes are propagated.

**Not run:** complete `UA.slnx` suites on net48/net10.0, a coverage
measurement, CI/CodeQL completion, native/fuzz qualifications, or
package publishing. This remains a draft pending full-stack integration
and CI evidence.

<details>
<summary>Initial-extraction validation command arguments and
outcomes</summary>

All commands ran from this layer's repository root. Variables below
expand the executable, project paths, filters and results directories
used by the actual commands; test output was also retained in
session-local log files.

```powershell
$dotnet = 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk\dotnet.exe'
$env:DOTNET_ROOT = 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk'
$env:DOTNET_ROOT_X64 = $env:DOTNET_ROOT
$env:DOTNET_CLI_TELEMETRY_OPTOUT = '1'
$r10 = 'C:\Users\mschier\.copilot\session-state\9b51b89f-b5ed-4ed7-a097-cca67efe7b0e\files\validation-net10'
$r48 = 'C:\Users\mschier\.copilot\session-state\9b51b89f-b5ed-4ed7-a097-cca67efe7b0e\files\validation-net48'
$client = 'tests\Opc.Ua.Client.Tests\Opc.Ua.Client.Tests.csproj'
$server = 'tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj'
$webapi = 'tests\Opc.Ua.Bindings.Https.WebApi.Tests\Opc.Ua.Bindings.Https.WebApi.Tests.csproj'
$subscriptions = 'tests\Opc.Ua.Subscriptions.Tests\Opc.Ua.Subscriptions.Tests.csproj'
$clientFilter = 'FullyQualifiedName~Opc.Ua.Client.Subscriptions|FullyQualifiedName~Opc.Ua.Client.Tests.FileSystem'
$serverFilter = 'FullyQualifiedName~HostedRolePresetTests|FullyQualifiedName~IdentityHostingTests|FullyQualifiedName~ServerFluentApiHostingTests|FullyQualifiedName~ServerCompositionHostingTests|FullyQualifiedName~OpcUaServerBuilderExtensionsCoverageTests'
$subscriptionFilter = 'FullyQualifiedName~Opc.Ua.Subscriptions.Tests.TransferSubscriptionTests|FullyQualifiedName~Opc.Ua.Subscriptions.Tests.SubscriptionSnapshotTests'

& $dotnet --version
# Passed: 10.0.401.

& $dotnet test $client --no-restore -c Release -f net10.0 -p:CustomTestTarget=net10.0 --filter $clientFilter --logger 'trx;LogFileName=client-net10.trx' --results-directory $r10 --verbosity quiet
# Exit 0 but no tests executed: missing restore metadata. NOT counted as validation.

& $dotnet build $client --no-restore -c Release -f net10.0 -p:CustomTestTarget=net10.0 --verbosity quiet
# Failed: NETSDK1004, missing obj\project.assets.json. Normal restore was then allowed in test commands.

& $dotnet test $client -c Release -f net10.0 -p:CustomTestTarget=net10.0 --filter $clientFilter --logger 'trx;LogFileName=client-net10.trx' --results-directory $r10 --verbosity quiet
# Passed: 546, Failed: 0, Skipped: 0.

& $dotnet test $server --no-build --no-restore -c Release -f net10.0 -p:CustomTestTarget=net10.0 --filter $serverFilter --logger 'trx;LogFileName=server-net10.trx' --results-directory $r10 --verbosity quiet
# Passed: 164, Failed: 0, Skipped: 0.

& $dotnet test $webapi -c Release -f net10.0 -p:CustomTestTarget=net10.0 --filter 'FullyQualifiedName~WebApiWssTransportChannelTests' --logger 'trx;LogFileName=webapi-net10.trx' --results-directory $r10 --verbosity quiet
# Passed: 37, Failed: 0, Skipped: 0.

& $dotnet test $client -c Release -f net48 -p:CustomTestTarget=net48 --filter $clientFilter --logger 'trx;LogFileName=client-net48.trx' --results-directory $r48 --verbosity quiet
# Passed: 542, Failed: 0, Skipped: 0.

& $dotnet test $server --no-build --no-restore -c Release -f net48 -p:CustomTestTarget=net48 --filter $serverFilter --logger 'trx;LogFileName=server-net48.trx' --results-directory $r48 --verbosity quiet
# Failed: Passed: 155, Failed: 9, Skipped: 0; startup timeouts and 9 undisposed certificates at teardown.

& $dotnet test $subscriptions -c Release -f net48 -p:CustomTestTarget=net48 --filter $subscriptionFilter --logger 'trx;LogFileName=subscriptions-net48.trx' --results-directory $r48 --verbosity quiet
# Passed: 6, Failed: 0, Skipped: 0.

& $dotnet test $subscriptions -c Release -f net10.0 -p:CustomTestTarget=net10.0 --filter $subscriptionFilter --logger 'trx;LogFileName=subscriptions-net10.trx' --results-directory $r10 --verbosity quiet
# Passed: 6, Failed: 0, Skipped: 0.

& $dotnet msbuild $webapi -p:CustomTestTarget=net48 -p:TargetFramework=net48 -getProperty:TargetFramework,RestrictForLegacyTfm,_RestrictedToLegacyTfm,IsTestProject,EnableDefaultCompileItems
# Passed: net48 / true / true / false / false. Confirms the net48 project is an empty non-test shell.

# Each following diagnostic invocation had certificate allocation tracking enabled.
$env:OPCUA_CERTIFICATE_LEAK_TRACKING = '1'

& $dotnet test $server --no-build --no-restore -c Release -f net48 -p:CustomTestTarget=net48 --filter 'FullyQualifiedName~HostedRolePresetTests' --logger 'trx;LogFileName=hosted-role-net48.trx' --results-directory $r48 --verbosity quiet
# Passed: 10, Failed: 0, Skipped: 0.

& $dotnet test $server --no-build --no-restore -c Release -f net48 -p:CustomTestTarget=net48 --filter 'FullyQualifiedName~ServerFluentApiHostingTests.AddServerWithCustomServerStartsCustomServerAsync' --logger 'trx;LogFileName=hosting-startup-net48.trx' --results-directory $r48 --verbosity quiet
# Failed: Passed: 0, Failed: 1, Skipped: 0; 30-second startup timeout and one certificate leak.

# A fresh, dedicated short working directory was created for the following two runs.
& $dotnet test $server --no-build --no-restore -c Release -f net48 -p:CustomTestTarget=net48 --filter 'FullyQualifiedName~ServerFluentApiHostingTests.AddServerWithCustomServerStartsCustomServerAsync' --logger 'trx;LogFileName=hosting-startup-net48-shortpath.trx' --results-directory $r48 --verbosity quiet -- 'NUnit.WorkDirectory=D:\Temp\opc-l2-6caf4556'
# Passed: 1, Failed: 0, Skipped: 0; no certificate leak.

& $dotnet test $server --no-build --no-restore -c Release -f net48 -p:CustomTestTarget=net48 --filter $serverFilter --logger 'trx;LogFileName=server-net48-shortpath.trx' --results-directory $r48 --verbosity quiet -- 'NUnit.WorkDirectory=D:\Temp\opc-l2-6caf4556'
# Passed: 164, Failed: 0, Skipped: 0; no certificate leak or assembly-level teardown error.
# The dedicated short working directory and its generated PKI contents were removed afterward.
```

TRX inspection confirmed all initially added client (3), WSS (4), and
hosted-role (10) regression cases executed on supported frameworks. The
initial 13-path set and source blobs were verified before the extraction
commit. A separate mistyped SDK availability probe
(`uals-528-deep-repro` instead of `ualens-528-deep-repro`) failed before
launching any process; all actual builds/tests used the correct verified
SDK above.

</details>

## Related Issues

Related to #4461; extracted from source PR #4462. Neither is closed by
this PR. Prerequisite: #4801, the core/types layer.

_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))._

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
- [x] I have addressed **all** PR feedback received.
2026-10-15 19:29:42 +02:00
Marc Schier 0374e19121 Add MachineTool, WMTP, GMS and CranesHoists companions (#4765)
# 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._

Add provider-backed MachineTool, bundled WMTP, GMS and CranesHoists
companions using the existing Machinery/MachineVision fluent, DI and
typed-client approach. **The PR is open/non-draft by user choice.
Current head `ecc4a7d6ca3e8004cf28ab54da605da302d026bf` is mergeable and
has 108 successful checks, six intentionally skipped checks, zero
failures and zero pending checks. All five primary workflows completed
successfully at that exact head.**

| Family | Released specification/model | Packaging |
| --- | --- | --- |
| MachineTool | OPC 40501-1, 1.02.0 | Model, Server, Client and MCP;
normal root versions |
| WMTP | OPC 40505, 1.0.0 | Bundled in MachineTool; distinct CLR/wire
namespace and independent WMTP-only hosting |
| GMS | OPC 40210 reference 1.0.1, normative model 1.0.0 | Model,
Server, Client and MCP; normal root versions |
| CranesHoists | OPC 40020-1, 1.00 | Model, Server, Client and MCP; all
four plus Debug variants forced preview |

There are **12 new packable projects**. No separate WMTP
package/profile/guide, root version bump, tag, release or package
publication is included. Mandatory instance structure is the default;
selected optional features require explicit providers. The
implementation reuses Machinery results/jobs/files/ProcessValues and
Robotics topology, including retained MachineTool Production, defined
GMS jobs/parts, modern ISA95/Machinery jobs, shared-owner hosting and
isolated instances alongside MachineVision.

Runtime and integration fixes preserve raw quality/timestamps, coherent
acquisition, namespace ownership, accepted-configuration state,
borrowed-resource lifetime, session/node/file cleanup, terminal-value
publication, event propagation and endpoint-aware capability
publication. Firmware/licence transfer means provider acceptance, not
installation/activation. Cancellation does not silently abort another
caller's operation. The later upstream MCP expansion is integrated
without losing either family set or its default-off privileged/live
execution policy.

### Conformance and scope

Canonical model inputs are pinned to UA-Nodeset revision
`96a08945425d0295edb3607d2a38f6841ef44046`.

**GMS upstream exception:** [Annex
A.1](https://reference.opcfoundation.org/specs/OPC-40210/annex-a) makes
the released NodeSet normative, but §12.3.2.7 requires undefined
`GMS_ProductionStatisticsType`. Inherited statistics and defined
jobs/parts are implemented without inventing a standard type/NodeId; the
complete GMS Production facet is withheld.

The requirement ledger records **102 positively evidenced CU rows, 96
directly negative-tested rows and six explicit negative-evidence
limitations**. All 648 test-class/name/TRX links were independently
resolved to passing cases. The six limitations concern Stacklight,
retained legacy PowerOnDuration, Machinery PowerOnDuration, WorkingUnit,
Obligation and MaintenanceMode. They are not claims that every
invalid-input or hardware-control behavior was tested. The undefined GMS
requirement is outside the 102 defined CUs. No external certification
claim is made.

Retained baseline complete-assembly line coverage, with generated code
retained and no source exclusions:

| Family | Model | Server | Client |
| --- | ---: | ---: | ---: |
| MachineTool/WMTP | 83.80% | 91.98% | 84.74% |
| GMS | 95.51% | 90.63% | 88.38% |
| CranesHoists | 92.76% | 94.45% | 92.24% |

These nine measurements predate the later focused review fixes and
merges; they are not relabelled as new `ecc4a7d6c` percentages. The
current head's separate CI code-coverage check succeeded. No new
exclusions or threshold relaxations were introduced.

## Related Issues

- Fixes
[#4764](https://github.com/OPCFoundation/UA-.NETStandard/issues/4764),
the implementation/design and acceptance tracker.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
- [x] I have addressed **all** PR feedback received.
2026-10-15 15:15:46 +02:00
Wolfgang Colsman 12a76ade55 PubSub server: organize PublishedDataSets under PublishSubscribe.PublishedDataSets (#4793)
# Description

PubSubNodeManager looked up the parent of the PublishedDataSet and
DataSetFolder objects it materializes by NodeId i=14478. That is
DataSetFolderType's <DataSetFolderName> placeholder, an
InstanceDeclaration
of the type, not the PublishSubscribe.PublishedDataSets object
(i=17371).
Every PublishedDataSet therefore became a child of the type definition
and
the standard PublishedDataSets folder stayed empty.

Use ObjectIds.PublishSubscribe_PublishedDataSets as the parent. The test
harnesses now expose the real folder and the placeholder, and a new test
asserts that a PublishedDataSet ends up under the folder and that the
placeholder gains no children.

## Related Issues

None.

## 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.
- [x] 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>
Co-authored-by: Marc Schier <marcschier@users.noreply.github.com>
2026-10-15 14:27:52 +02:00
Marc Schier d764161a53 Extract core/types fixes for schemas, replay, and source generation (#4801)
# Description

Extract the reusable core/types layer from #4462 without including
UaLens or the other planned extraction layers.

- Preserve null versus empty in `ByteString.Copy`, and provide
older-framework path, random-byte, and SHA-256 convenience APIs.
- Encode abstract numeric structure fields (`Number`, `Integer`, and
`UInteger`) as Variants in JSON, XSD, and BSD schemas, with regression
coverage and schema documentation.
- Add opt-in complete-file validation for finalized PCAP replay while
retaining the existing tolerant reader default.
- Keep placeholder references on generated type templates, not runtime
instances, while preserving ordinary external references.

**Initial extraction:** commit
`8881e096fb5e4eaa36f3c13f8caa57733373bd19` preserves the assigned
changes from source `390c4a7a51b71da40caec2d22ef74518bbe670ce`, based on
pinned `master` commit `5b03e9afa492cdb36049ee52ae844f630f89d8db`: 20
exact full-file extractions and only the generic replay paragraph in
`docs/Diagnostics.md`. The UaLens capture-window paragraph remains with
the source PR. No UaLens projects, UI, native-rendering paths,
dependencies, or workflows are included.

**Review follow-up:** `814c0f2dc6056ea5eb898611565b3e96cfa65104` fixes
direct-placeholder references that bypassed filtering through
`TargetPath` and emitted an undefined `forInstance` guard in
instance-only factories. Filtering now follows target resolution.
Compilation/reference-shape regressions cover ObjectType/VariableType,
both placeholder rules, and direct-child/external targets;
`docs/NodeManagers.md` documents the behavior. The review thread was
resolved after publication and verification.

**CI follow-up:** `93ec3928bd5a9cb2ea86110085e79131db17d443` addresses
both causes found in [CI run
38700770996](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/38700770996):

- `MODELGEN012` treated an identical payload-less transitive dependency
declaration as a competing model producer after the SDK Programs model
appeared in newer `master`. Matching closure rows no longer emit that
diagnostic. Producer ordering is unchanged; actual producers, differing
declarations, and malformed payload handling retain their existing
diagnostics. New regression cases exercise both reference orders, and
`docs/ModelDependencies.md` records the distinction.
- The queue-fairness test sampled OS scheduling and failed on macOS.
This reuses the exact one-file correction from
`84d2c34d3902bfe700a87f6c30708b435500878f` in #4765: hold the existing
heavy-owner publication hook, prove concurrent work-conserving progress,
then assert exact recovered 1:3 service, all 960 unique requests, and
complete queue/token/owner/lease cleanup. No production scheduler or
fairness bound was changed.

The PR now changes 26 paths. Its pinned extraction ancestry is
preserved: no rebase, force push, or merge of newer `master` was
performed. This remains the bottom of native stack 4807, ordered 4801 ->
4802 -> 4803 -> 4804 -> 4806.

### Current CI-repair validation

Windows, existing .NET SDK **10.0.401**, **Release**, with analyzers
enabled. CI tested merge `9a2d252793da12aeb99ed379dfc9b03e89c912b7`
(master `d40843c23a5fe8116ffe380cf937d88759f5218b` plus PR head
`814c0f2dc6056ea5eb898611565b3e96cfa65104`), which includes newer tests
absent from the pinned extraction branch. That exact merge was
reproduced in a disposable detached worktree, then the proposed patch
was applied. Git patch-id verified that the tested patch and committed
branch patch were identical
(`b7ed3ba2b61d1862825dd33d93c50c64d3a759ea`).

Before the fix, all four failing client-accessor cases reproduced
`MODELGEN012`, and both new matching-reexport cases failed. After the
fix:

| Context / scope | Framework | Passed | Failed | Skipped |
| --- | --- | ---: | ---: | ---: |
| Exact CI merge + patch: client-accessor and dependency fixtures |
net10.0 | 32 | 0 | 0 |
| Same fixtures with CI coverage instrumentation | net10.0 | 32 | 0 | 0
|
| Exact CI merge + patch: entire SourceGeneration.Tests project |
net10.0 | 295 | 0 | 0 |
| Exact CI merge + patch: entire SourceGeneration.Tests project | net48
| 295 | 0 | 0 |
| Preserved PR branch: dependency and placeholder fixtures | net10.0 |
30 | 0 | 0 |
| Preserved PR branch: dependency and placeholder fixtures | net48 | 30
| 0 | 0 |
| Preserved PR branch: entire FairRequestQueueTests fixture, with
coverage | net10.0 | 93 | 0 | 0 |
| Preserved PR branch: entire FairRequestQueueTests fixture | net48 | 93
| 0 | 0 |
| Exact CI merge + patch: entire FairRequestQueueTests fixture, with
coverage | net10.0 | 93 | 0 | 0 |

All nine commands exited **0**. The repository TRX verdict helpers
verified **993 passing test executions, 0 failures, and 0 fixture
setup/teardown failures** across these overlapping runs. No
build/analyzer warnings were reported. Normal restore resolved missing
assets/target entries in the new checkout and when switching TFMs; no
dependency declaration or SDK pin was changed.

Exact successful test argument sets follow. Variables abbreviate the
executable, project paths, and results directory only; output was also
captured to separate local logs.

```powershell
$env:DOTNET_ROOT = 'D:\git\UA-.NETStandard_master\TestResults\ualens-528-deep-repro\sdk'
$env:PATH = "$env:DOTNET_ROOT;$env:PATH"
$dotnet = "$env:DOTNET_ROOT\dotnet.exe"
$generator = 'tests\Opc.Ua.SourceGeneration.Tests\Opc.Ua.SourceGeneration.Tests.csproj'
$coreTests = 'tests\Opc.Ua.Core.Tests\Opc.Ua.Core.Tests.csproj'
$results = 'C:\Users\mschier\.copilot\session-state\8f497e89-7fc2-4f48-880b-4803d97c1c12\files\ci-validation'

# In the disposable exact-CI-merge checkout, with the identical proposed patch applied:
Set-Location 'D:\Temp\ua-ci4801-8f497e89'

# Passed: 32, Failed: 0, Skipped: 0
& $dotnet test $generator --no-restore --configuration Release --framework net10.0 -p:CustomTestTarget=net10.0 -p:RunAnalyzers=true -p:RunAnalyzersDuringBuild=true --filter 'FullyQualifiedName~ClientAccessorGeneratorTests|FullyQualifiedName~ModelDependencyScannerTests' --logger 'trx;LogFileName=ci-metadata-green-net10.trx' --results-directory $results --verbosity minimal

# Passed: 295, Failed: 0, Skipped: 0; reuses the analyzer-enabled build above
& $dotnet test $generator --no-build --no-restore --configuration Release --framework net10.0 -p:CustomTestTarget=net10.0 --logger 'trx;LogFileName=ci-sourcegeneration-merge-net10.trx' --results-directory $results --verbosity quiet

# Passed: 295, Failed: 0, Skipped: 0
& $dotnet test $generator --configuration Release --framework net48 -p:CustomTestTarget=net48 -p:RunAnalyzers=true -p:RunAnalyzersDuringBuild=true --logger 'trx;LogFileName=ci-sourcegeneration-merge-net48.trx' --results-directory $results --verbosity minimal

# Passed: 93, Failed: 0, Skipped: 0
& $dotnet test $coreTests --configuration Release --framework net10.0 -p:CustomTestTarget=net10.0 -p:RunAnalyzers=true -p:RunAnalyzersDuringBuild=true -p:CollectCoverage=true --collect 'XPlat Code Coverage' --settings 'tests\coverlet.runsettings.xml' --filter 'FullyQualifiedName~FairRequestQueueTests' --logger 'trx;LogFileName=ci-fairqueue-merge-net10.trx' --results-directory $results --verbosity minimal

# Passed: 32, Failed: 0, Skipped: 0
& $dotnet test $generator --configuration Release --framework net10.0 -p:CustomTestTarget=net10.0 -p:RunAnalyzers=true -p:RunAnalyzersDuringBuild=true -p:CollectCoverage=true --collect 'XPlat Code Coverage' --settings 'tests\coverlet.runsettings.xml' --filter 'FullyQualifiedName~ClientAccessorGeneratorTests|FullyQualifiedName~ModelDependencyScannerTests' --logger 'trx;LogFileName=ci-metadata-coverage-net10.trx' --results-directory $results --verbosity minimal

# In the preserved PR branch worktree:
Set-Location 'D:\git\copilot-worktrees\UA-wot-d3-final\marcschier-congenial-umbrella'

# Passed: 30, Failed: 0, Skipped: 0
& $dotnet test $generator --configuration Release --framework net10.0 -p:CustomTestTarget=net10.0 -p:RunAnalyzers=true -p:RunAnalyzersDuringBuild=true --filter 'FullyQualifiedName~ModelDependencyScannerTests|FullyQualifiedName~PlaceholderReferenceGeneratorTests' --logger 'trx;LogFileName=ci-sourcegeneration-branch-net10.trx' --results-directory $results --verbosity minimal

# Passed: 93, Failed: 0, Skipped: 0
& $dotnet test $coreTests --no-restore --configuration Release --framework net10.0 -p:CustomTestTarget=net10.0 -p:RunAnalyzers=true -p:RunAnalyzersDuringBuild=true -p:CollectCoverage=true --collect 'XPlat Code Coverage' --settings 'tests\coverlet.runsettings.xml' --filter 'FullyQualifiedName~FairRequestQueueTests' --logger 'trx;LogFileName=ci-fairqueue-branch-net10.trx' --results-directory $results --verbosity minimal

# Passed: 93, Failed: 0, Skipped: 0
& $dotnet test $coreTests --configuration Release --framework net48 -p:CustomTestTarget=net48 -p:RunAnalyzers=true -p:RunAnalyzersDuringBuild=true --filter 'FullyQualifiedName~FairRequestQueueTests' --logger 'trx;LogFileName=ci-fairqueue-branch-net48.trx' --results-directory $results --verbosity minimal

# Passed: 30, Failed: 0, Skipped: 0
& $dotnet test $generator --configuration Release --framework net48 -p:CustomTestTarget=net48 -p:RunAnalyzers=true -p:RunAnalyzersDuringBuild=true --filter 'FullyQualifiedName~ModelDependencyScannerTests|FullyQualifiedName~PlaceholderReferenceGeneratorTests' --logger 'trx;LogFileName=ci-sourcegeneration-branch-net48.trx' --results-directory $results --verbosity minimal
```

`git diff --cached --check` passed. The queue-test blob was verified
byte-for-byte against the existing published correction. The upstream
branch was verified as `93ec3928bd5a9cb2ea86110085e79131db17d443` after
push.

**Remote CI is pending, not claimed green:** [new CI run
38712127138](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/38712127138).
Cross-platform confirmation, CodeQL, coverage gates, and the complete
`UA.slnx` suites on this new head are not established by these local
checks. The source PR's checks are not claimed as evidence for this
branch.

### Earlier validation

The original extraction had 1,407 passing scoped test executions across
net10.0/net48. The placeholder-review follow-up had six passing focused
cases and 269 passing tests in the full source-generator project on each
framework, with analyzer-enabled builds. Those are historical results
for their respective commits, not fresh full-suite evidence for the
CI-repair head. Earlier command details remain in this PR's edit
history.

## Related Issues

- Related to #4461 (existing tracking issue; not auto-closing).
- Extracted from #4462 (source PR; remains open and is not
auto-closing).
- Reuses the bounded queue-test correction from #4765; does not
incorporate that PR's other changes.

_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))._

This began as an exact extraction of existing behavior. The subsequent
commits address the reported placeholder-generation defect and observed
CI failures; they are not a new design or a claim of design sign-off.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
- [x] I have addressed **all** PR feedback received.
2026-10-15 12:21:46 +02:00
Wolfgang Colsman d40843c23a Client: make the UaFileInfo constructor public (#4790)
# Description

FileSystemClient hands out UaFileInfo objects only for files it resolves
by path below its root directory. An application that already knows the
NodeId of a FileType object, for example from a reference or a method
result, could not get a UaFileInfo for it because the constructor was
internal, and had to fall back to the raw FileTypeClient proxy.

The constructor is now public and documented, and it rejects a null
segment list. A test creates a UaFileInfo for a known NodeId and reads
its metadata through it.

## Related Issues

None.

## 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.
- [x] 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>
Co-authored-by: Marc Schier <marcschier@users.noreply.github.com>
2026-10-15 09:38:21 +02:00
Marc Schier 15d0ce7bd5 Implement OPC UA Part 10 Programs (#4789)
# Description

Implement OPC UA Part 10 Programs across `Opc.Ua.Core`/`Core.Types`,
`Opc.Ua.Server`, and `Opc.Ua.Client`, reusing the existing
state-machine, source-generation, node-management, auditing, and
streaming-subscription infrastructure.

- Add asynchronous provider-backed execution, standard controls,
internal/autonomous transitions, generation checks, and nested-state
activation/resumption.
- Add checked creation/adoption, vendor Create adapters, deletion,
recycling and instance limits, auto-delete, DI, and direct-construction
paths.
- Maintain ProgramDiagnostic2 and retained final results; publish
captured intermediate results and concrete transition/audit events with
access controls.
- Add generated SDK models/proxies, typed client discovery and reads,
event streams, and subscribe-before-call readiness handling.
- Add unit, connected client/server, generated Annex A-style model, and
NativeAOT coverage. Document usage and migration in `docs/Programs.md`
and related guides.

### Compatibility and design decisions

The linked Part 10 document is v1.05.00; namespace-zero definitions
remain aligned with 1.05.07. Documentation distinguishes normative
requirements from conflicting specification text and SDK conventions.

- Correct state numbers to Halted=11, Ready=12, Running=13,
Suspended=14. Generated subtypes retain inherited namespace-zero
state/transition identifiers.
- Managed Reset is Halted-to-Ready only. Preserve the existing low-level
Reset-from-Suspended behavior for compatibility.
- Preserve UInt32 limit types; use `UInt32.MaxValue` as a documented SDK
unlimited convention. RecycleCount overflow reports BadOutOfRange
without stopping unlimited execution.
- In-memory default with injectable providers. Durable recovery,
distributed execution/failover, and a production Annex A download engine
are excluded.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.

Tests and focused coverage evidence are above; the combined
tests/coverage checkbox remains open because a whole-repository coverage
increase has not been established. CLA status, CI/CodeQL results,
tracking-issue approval, and PR feedback are not asserted.
2026-10-15 09:19:25 +02:00
Wolfgang Colsman 9746c62b49 Server: make TrustList.ValidateNewTrustListAsync public (#4799)
# Description

TrustList validates an uploaded TrustList before CloseAndUpdate commits
it:
every certificate is validated against the new TrustList (the uploaded
certificates and CRLs, or the current stores for lists that were not
specified), CRLs must belong to a CA of the result, and
IssuerCertificates
must be CA certificates. The check was private, so an application that
applies a TrustList by other means, for example a GDS push it receives
through its own channel, could not apply the same check first and had to
duplicate it.

The method is now public and documented; its behaviour is unchanged. A
test calls it for an accepted TrustList, for one whose issuer is missing
and for one that lists a leaf certificate as an issuer.

## Related Issues

None.

## 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.
- [x] 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>
Co-authored-by: Marc Schier <marcschier@users.noreply.github.com>
2026-10-15 08:28:16 +02:00
Marc Schier 724757122b Add recycling simulator and plastics/rubber companion packages (#4772)
# Description

Add a generic, company-neutral recycling simulation sample and reusable
plastics/rubber companion-model packages. One durable causal coordinator
and ten separately launched OPC UA process views provide deterministic
material balances, finite buffers, genealogy, utilities, quality
holds/disposition, authenticated controls and crash recovery. Process
views consume committed state instead of running independent
simulations.

Real companion-model equipment instances use DI/Machinery/AMB discovery,
Machine Vision, Pumps/Scales, granulate drying, extrusion, filtration
and pelletizing. Vendor/process extensions remain sample-local.
Connectors and WoT conversion are out of scope. **External
source-contract parity and complete deployment qualification are not
claimed complete.**

The sample and managed tests target **.NET 8, 9 and 10**. The
consolidated [recycling guide](samples/Recycling/README.md) explains the
actual composition, simulation, observation paths and exposed data; the
application-directory README points to that guide.

Typed client member extensions are emitted at build time through the
default-false `ModelSourceGeneratorClientAccessorsOnly` opt-in.
Extrusion uses it for all twelve parts instead of checked-in generated
C# and a Python generator. The shared client runtime retains typed
values, quality, timestamps and streaming behavior.

### Package layout

Six packages contain fourteen models in two model-producing assemblies:

| Specifications | Model | Typed client | Server runtime |
| --- | --- | --- | --- |
| OPC 40083 and OPC 40082-6 | `Opc.Ua.PlasticsRubber` |
`Opc.Ua.PlasticsRubber.Client` | `Opc.Ua.PlasticsRubber.Server` |
| OPC 40084 parts 1–12 | `Opc.Ua.Extrusion` | `Opc.Ua.Extrusion.Client`
| `Opc.Ua.Extrusion.Server` |

NuGet IDs use the `OPCFoundation.NetStandard.` prefix. All six packages
are registered in `.azurepipelines/expected-packages.txt` and the
generated preview-pack solution. Granulate-drying code lives in
`GranulateDrying` folders in the PlasticsRubber projects; extrusion uses
per-part folders. There are no standalone granulate-drying or per-part
extrusion packages. Published model identities and CLR namespaces remain
distinct and unchanged.

The common 1.03 interface is independently authored on the explicitly
MIT-licensed 1.02 implementation basis; the official 1.03 XML is not
redistributed. The other imported models retain their individual MIT
notices. All 42 pinned model, identifier and basis files retain their
manifest-backed bytes, including their staged Git blobs. No formal
companion certification is claimed; the disputed Filter profile is not
advertised.

## Related Issues

No tracking issue is currently linked.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
- [x] I have addressed **all** PR feedback received.

Current-head CI and coverage remain pending; the full local `UA.slnx`
test matrix is not claimed complete.
2026-10-15 07:00:58 +02:00
Cristi Pogacean af601ebca8 Complete model-change reporting for committed node deletions (#4778)
# Description

Finalize deletion model-change reporting from observed address-space
outcomes, including when later cleanup fails or the caller cancels the
request.

A shared internal snapshot captures registered subtree nodes,
pre-removal NodeVersion eligibility, and relevant reference endpoints.
Completion reports only removed nodes and references actually removed
from surviving local nodes, then rethrows the original deletion failure.
If reporting also fails, both errors remain visible.

This preserves notifications for versioned descendants below unversioned
roots and applies strict deletion eligibility to the service-facing
overload. It avoids blindly reporting the requested subtree from a
finally block.

For endpoints owned by another node manager in the same server,
reporting requires target-reference cleanup to be both requested and
successful because the remaining foreign references cannot be inspected
locally. A successful service deletion with `DeleteTargetReferences =
false` does not imply foreign reference removal. Reporting covers both
directions of hierarchical and non-hierarchical references; absolute
targets are excluded, matching the cleanup path.

Master cleanup now propagates a bad per-reference `DeleteReferenceAsync`
result as a `ServiceResultException`. A normal return with a bad status
is therefore not mistaken for successful foreign cleanup. Committed
local changes are still reported before the cleanup failure is rethrown;
unconfirmed foreign reference removals are not reported.

The branch includes the merge of current master after #4776 and #4777
merged. This PR preserves their per-node monitored-item restoration,
independent cleanup budgets, and NodeVersion eligibility behavior. It
does not introduce further monitored-item completion changes; the
remaining diff is outcome-based model-change completion, its regression
tests, and documentation. It contains no release-version changes.

## 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 #4769
- Related: #4768, #4770 (addressed by merged PRs #4776 and #4777).
- Design and failure reproduction are recorded in #4769.

## 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.

## Validation

### Current head: `524e46fbe`

The server test project and its dependencies built without
build/analyzer warnings or errors. The following command covers the
deletion/model-change regressions, the complete monitored-item lifecycle
fixture, and the master node-management dispatcher fixture:

```powershell
& 'C:\Program Files\dotnet\dotnet.exe' exec 'C:\Program Files\dotnet\sdk\10.0.402\dotnet.dll' test tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj --no-restore -f net48 -p:CustomTestTarget=net48 -p:NuGetAudit=false -m:2 --filter "FullyQualifiedName~AsyncCustomNodeManagerTests&Name~Delet|FullyQualifiedName~AsyncCustomNodeManagerNodeManagementTests&Name~DeleteNode|FullyQualifiedName~MonitoredItemManagerLifecycleTests|FullyQualifiedName~MasterNodeManagerNodeManagementTests" --logger "trx;LogFileName=foreign-cleanup-status-net48.trx" --results-directory 'C:\Users\crpogace\.copilot\session-state\f4f431fc-413e-40d4-88a7-83f6ade0c9a7\files\foreign-cleanup-status-results'
```

Result: **296 passed, 0 failed**; 25 fixture combinations are
inapplicable to the legacy adapter and were not executed.

Regression coverage includes late cleanup failure/cancellation,
pre-mutation cancellation, partial subtree removal, service eligibility,
versioned descendants, preservation of simultaneous deletion/reporting
failures, foreign-reference direction/type combinations, requested
versus omitted cleanup, failed cleanup, and absolute-target exclusion.
New regressions exercise the real master cleanup dispatcher with `Good`,
`BadNotSupported`, and `BadUnexpectedError` results across async
internal/service deletion and legacy runtime deletion. Before the fix,
10 bad-status cases failed; the 5 successful-cleanup controls passed.

**Current-head net10.0 tests were not executed locally:** the machine
now has SDK 10.0.402 rather than the pinned 10.0.401. Restore requires
`Microsoft.NET.ILLink.Tasks` 10.0.13, which is absent from the local
cache, and the NuGet endpoint fails its TLS handshake. This is an
environment/restore blocker, not a test failure. The explicit SDK
invocation above does not change the repository SDK pin.
`NuGetAudit=false` was invocation-only because the audit endpoint was
unavailable; repository audit settings are unchanged.

The earlier pre-merge revision `0c53e143b` passed 96 focused deletion
tests on each of net10.0 and net48, with 22 inapplicable fixture
combinations per framework. Those historical results do not establish
net10.0 validation of the current merged head.

Full net48/net10.0 solution validation has not been completed locally.
The ordinary .NET 10 VSTest invocation cannot run the unchanged AOT
projects' Microsoft.Testing.Platform suites; this is a mixed-runner
invocation limitation, not evidence of an AOT compilation defect. Their
supported validation path is native publish-and-run, as used in CI. A
separate local Historian native AOT run passed 2/2 tests earlier in this
work, but does not establish complete AOT or current-head validation.

CI was still running when this description was updated; the full-suite
and CI checklist items remain unchecked.

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-10-14 14:03:23 +02:00
Cristi Pogacean 27c17fb410 Preserve NodeVersion eligibility when deleting runtime nodes (#4777)
# Description

Preserve a runtime node's NodeVersion eligibility before removing it
from the address space. Previously, deletion removed the local node
before model-change filtering, which then treated it as an unresolved
external node and emitted a spurious NodeDeleted entry.

This fixes unversioned runtime/session-diagnostics deletion in both
AsyncCustomNodeManager and the legacy CustomNodeManager. Strict mode
suppresses unversioned deletion entries; versioned nodes and the
explicit compatibility mode keep their events. The regression matrix
exercises all four eligibility combinations across both async
configurations and the legacy adapter.

The documentation now cites OPC UA Part 3 section 9.32.2, which requires
NodeVersion/model-change correlation.

This PR is intentionally limited to the original eligibility bug.
Per-node monitoring completion and outcome-based model-change completion
are separate changes tracked in #4768 and #4769, including broader
subtree/service-deletion handling.

## 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 #4770
- Related: #4768, #4769

## 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.

## Validation

The server test project and its dependencies built successfully on
net10.0 and net48 with no new build/analyzer warnings. Focused reruns:

```powershell
dotnet test tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj --no-build --no-restore -f net10.0 -p:CustomTestTarget=net10.0 --filter "Name~DeleteNodePreservesModelChangeEligibilityAsync"
```

Result: **12 passed, 0 failed**.

```powershell
dotnet test tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj --no-build --no-restore -f net48 -p:CustomTestTarget=net48 --filter "Name~DeleteNodePreservesModelChangeEligibilityAsync"
```

Result: **12 passed, 0 failed**.

Full-solution .NET 10 validation was attempted, but the unchanged AOT
test projects reject the VSTest target with Microsoft.Testing.Platform
2.4.1 under SDK 10.0.401. The run was stopped after this blocker was
confirmed. It is not reported as a passing suite.

Exact isolated reproduction of the blocker:

```powershell
dotnet test tests\Opc.Ua.Aot.Tests\Opc.Ua.Aot.Tests.csproj --no-build --no-restore -p:CustomTestTarget=net10.0 -p:NuGetAudit=false
```

Result: **failed** with "Testing with VSTest target is no longer
supported by Microsoft.Testing.Platform on .NET 10 SDK and later." The
full net48 solution was not run. Restore/build commands used
`NuGetAudit=false` because NuGet's audit endpoint was unavailable;
repository audit settings are unchanged.

Published as a draft by request until the full validation/CI gates are
satisfied. No release-version files are included; this branch starts
from master.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-10-14 08:44:23 +02:00
Cristi Pogacean f1e51c19f1 Restore monitoring for survivors of partial node deletion (#4776)
# Description

Complete failed recursive deletion according to each monitored node's
actual state, rather than inferring the entire subtree's outcome from
the root.

Monitored items for removed nodes remain detached and source-deleted.
Items for surviving descendants are restored with their existing
identity and ownership. Restoration attempts continue after individual
failures, and compensation failures are surfaced together with the
original deletion failure.

The change covers internal and service-facing async deletion and the
synchronous compatibility path. Regression tests monitor both the
removed root and surviving child across both monitored-item
implementations.

## 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 #4768
- Related: #4769, #4770
- Design and failure reproduction are recorded in #4768; this draft
awaits review/sign-off.

## 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.

## Validation

The server test project and its dependencies built successfully on
net10.0 and net48 with no new build/analyzer warnings. The entire
monitored-item lifecycle fixture, including six new partial-subtree
cases and four new compensation-failure cases, passed:

```powershell
dotnet test tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj --no-build --no-restore -f net10.0 -p:CustomTestTarget=net10.0 --filter "FullyQualifiedName~MonitoredItemManagerLifecycleTests"
```

Result: **63 passed, 0 failed**.

```powershell
dotnet test tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj --no-build --no-restore -f net48 -p:CustomTestTarget=net48 --filter "FullyQualifiedName~MonitoredItemManagerLifecycleTests"
```

Result: **63 passed, 0 failed**.

The full-solution .NET 10 VSTest invocation is blocked by the unchanged
AOT test projects' Microsoft.Testing.Platform configuration. Full
net48/net10 solution validation and CI remain outstanding.

The blocker was reproduced in the original-fix worktree with:

```powershell
dotnet test tests\Opc.Ua.Aot.Tests\Opc.Ua.Aot.Tests.csproj --no-build --no-restore -p:CustomTestTarget=net10.0 -p:NuGetAudit=false
```

Result: **failed** because Microsoft.Testing.Platform 2.4.1 rejects
VSTest under SDK 10.0.401. Restore/build commands used
`NuGetAudit=false` because the audit endpoint was unavailable;
repository audit settings are unchanged.

This is an independent master-based draft. It does not include the
separate NodeVersion eligibility fix or the model-change completion
redesign.

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-10-14 08:43:56 +02:00
Marc Schier be50f02700 Add additional companion spec MCP tool profiles (#4731)
# Description

Expose existing stack APIs through **337 additional domain MCP tools**:
114 industrial-companion tools, 35 WoT/xRegistry/document tools, and 188
higher-level stack-workflow tools. The fully enabled catalogue contains
**492 tools**; profile selection is not an execution grant.

The packages now follow the reviewed structure:
**`Opc.Ua.Mcp.Workflows`** contains roles/users, files, alarms and
history; **`Opc.Ua.Mcp.WotCon`** contains management/documents and
independently registered live WoT execution. GDS and schema tools remain
separate packages. The executable composes **18 libraries**.

| Workflow | Added domain tools | Profiles |
| --- | ---: | --- |
| GDS directory, certificates, reference-only credentials/tokens and
Part 21 onboarding | 46 | `gds`, `certificates`, `credentials`,
`onboarding` |
| Roles/users, regular and temporary files, alarms/conditions and
historical access | 74 | `roles`, `users`, `files`, `alarms`, `history`
|
| Bounded runtime types, XSD/BSD/UA JSON, PubSub and REST OpenAPI
artifacts | 6 | `schemas` |
| Named PubSub transports, remote configuration, declarative
adapters/bridges and SKS | 52 | `pubsub-runtime`,
`pubsub-configuration`, `pubsub-bridge`, `pubsub-security` |
| Live HTTP(S), MQTT, Modbus TCP and OPC UA WoT forms | 10 |
`wot-runtime` |

- Reuse typed clients, generated proxies, SDK transports, schema
providers and injected services rather than introducing another session
manager or protocol engine.
- Require host enablement plus exact caller/session/secret/network
grants. Protected generic Call/Write/node-management/history/file paths
enforce the same policy.
- Bind classifications, dispatches, file handles and historical cursors
to actual UA generations. Recovery cannot retarget an old handle or
authorized mutation. Preserve acknowledged results after late
cancellation; do not imply atomicity or retry business commands.
- Use opaque secret-store references, explicit writable-store
registration, issuer/resource/caller binding and reserved capacity
before issuance. Report remote success/local persistence failure as
partial completion; redact provider-controlled diagnostic text.
- Bound new named runtimes to eight per host, two per caller,
five-minute idle expiry and a thirty-minute absolute lease by default.
Pending/closing resources consume quota; failed cleanup remains visible.
Credential invalidation and session recovery close dependent runtimes.
- Keep document planning separate from execution, artifacts
root-confined and real JSON inputs typed. Preserve old profile ordinals
while widening the set to 64 bits. CI grades fully enabled privileged
catalogues rather than connection-only views.

**Limitations:** live Kafka remains explicitly unavailable because the
backend cannot enforce policy on broker-discovered connections;
configuration/schema/capability inspection stays available. The latest
public Dekaf v1.23.5 was also checked and its DNS injection remains
internal. No private-API workaround or bootstrap-only security claim was
added. Full legacy Core registration retains its documented
JSON-reflection limitation: native tests isolate its four connection
descriptors and validate the expanded production registrations, not
whole-host NativeAOT support.

## Related Issues

- Fixes #4730.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
2026-10-14 00:14:05 +02:00
Marc Schier 3e433eb6c4 XRegistry: registration lifecycle, identifier allocation, registrar roles and atomic Resource replace (#4756)
# Description

Extracts the generic xRegistry registration lifecycle from the WoT work
into a standalone, master-targeted change:

- Canonical xRegistry identifier allocation (`XRegistryIdentifier`) with
case-folded bounded collision handling and exact Version
allocation/delete semantics.
- Registrar roles / capabilities in the xRegistry NodeSet2 model (only
the roles/capabilities facts).
- Default-Version views and Resource Meta handling.
- FileType read/write modes, session ownership/discard, cursor handling,
and short reads until actual EOF on the client.
- Atomic whole-document `ReplaceAsync` on the in-memory and file-system
resource stores.
- Generic projection engine/provisioning and projection contracts, label
ownership/no-op behavior, Resource-vs-Version event targets.
- Documentation in `docs/XRegistry.md` and XML docs for owned members.
- Tests: Identifier, RegistrarRoles, Attribute, Projection,
RegistrationEvent, FileMode, ResourceStore, Client, VersionAssignment,
concurrent read.

Intentionally excluded (handled in separate PRs): trusted Federation /
Registry origin model and provider (G9); WoT lease/dispatcher, prepared
manifest, 0.7 model/version bump (G12).

Merged current `master` (a14b23e7d) with an ordinary merge; no
conflicts.

## Qualification (head a8fb2d01)

- `b9b4f224`: `Opc.Ua.XRegistry.Tests` 411/411 passed on net10.0 and
net48 (raw exit 0). TRX SHA256 net10 `4F669A1A...B02B`, net48
`3EDBFF2A...7D29`.
- `a8fb2d01` differs from `b9b4f224` by one added blank line (static
whitespace-only proof, CRLF intact); no rebuild/rerun of tests on
`a8fb2d01`.
- `a8fb2d01`: default-analyzer `dotnet format --verify` on
`Opc.Ua.XRegistry.Tests` reports 0 findings in lines changed by this PR;
128 pre-existing baseline findings are untouched.
`Opc.Ua.XRegistry.Server`: 0 owned (13 baseline) as of `b9b4f224`.
- Not claimed: full UA.slnx, native, or all-CI results.

## Related Issues

- No tracking issue; split of the WoT/xRegistry work.

## 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.
- [ ] 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.
2026-10-13 18:48:07 +00:00
Marc Schier c2b95e2085 XRegistry: trusted logical-Resource federation identity (#4755)
# Description

Adds trusted **logical-Resource** federation identity to XRegistry - A
federation proxy binds an origin registry (`RegistryOriginDataType`),
application, portable `ResourceNodeId` and Xid, never an endpoint or
content-digest identity.

- `XRegistryFederationTarget`, `IXRegistryFederationProvider`,
`XRegistryClient.Federation` (verify/follow/relocate; uses master's
`ISessionBindingProvider.CreateBindingAsync`).
- `XRegistryFederationNodeManager`, `XRegistryServerOptions`/DI:
required target/provider verification and proxy admission.
- Model hunks only: `RegistryOriginDataType` 63026 (+encodings
63591/63592), `OriginRegistry` 63593 + `ResourceType` HasProperty,
`ExternalReference`/`ResourceUrl` description rewrites.
- Tests (`XRegistryFederationNodeManagerTests`), package READMEs,
`docs/XRegistry.md` Federation section (links `SessionBindings.md`).

Merged current master (a14b23e7) into the branch (ordinary merge, no
conflicts).

## Dependency merge gate (not in this PR)

- Group 8 owns registrar roles/capabilities (63027-63029, 63594-63600)
and generic registration/ProjectionEngine/FileType work. When G8 lands,
the model XML must be combined by whole-element merge keeping both
slices (one additive-tail textual conflict is expected).
- Model 0.7 / date / version and csproj package-version bump are
unallocated here (integration owner, Group 12). This is a partial model,
not a new release.
- WotCon live federation fixtures need the WoT registry base partial
(G8/G12) and are excluded.

## Verification (source b6a68701dc)

- Secured live Verify/Follow harness
(`XRegistryClientFederationLiveTests`, 15 cases, real
`XRegistryProjectionEngine` test host): **15/15 passed on net10.0** (TRX
SHA256 `F54DB38E...E518`) and **15/15 passed on net48** (local guarded
runs, raw exit 0).
- Owned `dotnet format --severity info --verify-no-changes` findings: 0.
Remaining findings are baseline only (`XRegistryClient.cs:532` RCS0055;
unrelated WotCon.Tests lines).
- Client fix: `CaptureFederationBindingAsync` maps only binding-capture
`ObjectDisposedException` to `BadSessionClosed`.
- **Not claimed:** full UA.slnx test run, coverage, NativeAOT, or CI
results; the `XRegistryFederationNodeManager` unit-test async changes
and `ClearChangeMasksAsync` change are source changes pending CI.

## Opaque identity capture (source
fb5ea84644)

- `XRegistryFederationTarget` and `XRegistryClient` now own a deep copy
of opaque (ByteString) `NodeId`/`ExpandedNodeId` identities before
portable identity capture (internal `XRegistryNodeIdCopy`,
compile-linked into the client; namespace index/URI/server index
preserved, non-opaque ids unchanged). No public API change.
- Public regression tests (`XRegistryOpaqueIdentityTests`):
`TargetResourceNodeIdIgnoresLaterBufferMutation`,
`TargetOriginRegistryNodeIdIgnoresLaterBufferMutation`,
`ClientRegistryNodeIdIgnoresLaterBufferMutation`,
`TargetNonOpaqueNodeIdsKeepTheirIdentity`.
- RED on old source (b6 + tests only, `b840e654`, net10.0): 3 mutation
tests failed, non-opaque control passed (TRX SHA256
`01B4868E...BEA3B9A`).
- GREEN at `d02480d9` (net10.0 and net48): 4/4 passed; full secure live
harness 15/15 on net10.0 and net48.
- `fb5ea84` differs from `d02480d9` only by a final newline in the new
test file (`git diff -w` empty); runtime results above were executed at
`d02480d9`, not re-executed at `fb5ea84`. Tests-project formatter at
`fb5ea84`: clean.
- Format: `XRegistry`/`Server` clean; `Client` only baseline
`XRegistryClient.cs:532` RCS0055; WotCon.Tests not re-run (restore
assets missing; hunks unchanged since b6 proof).
- **Not claimed:** full UA.slnx, coverage, NativeAOT, or CI results.
## Related Issues

- None.

## 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.
2026-10-13 17:32:52 +00:00
Marc Schier 7c965fd636 Capture metadata images and generation-bound session clients (#4752)
# Description

- Add isolated NodeState reference images, TypeTable graph snapshots,
EncodeableFactory registration forks/views, StringTable mutation
versions/private copies, and ServiceMessageContext mapping-holder
generation tracking. Reference images are lazy for empty nodes;
selected-image clones own independent storage and publication ownership.
- Add the complete generic NodeBrowser continuation-dependency
capability. This does not implement server browse-history retention,
NodeManager read images, or server batch/readiness admission.
- Add optional client binding capture for SessionClient, native Session
and ManagedSession, with managed-lease/native-channel generation
composition. Bindings capture authenticated-session identity, mapping
holders/versions and owned endpoint/policy/configuration observations.
Replacement, reconnect, mapping ABA and disposal permanently invalidate
stale bindings; disposing a binding does not dispose its owner.
- Preserve cancellation and master pooled-response ownership: a rejected
pooled response is released exactly once; an accepted response remains
caller-owned. Keep native transport submission under its replacement
gate and completion outside the gate, without routing ordinary unbound
requests through binding machinery.
- Rename the existing server lookup interface and all actual consumers
with minimal hunks; add focused fixtures, generated FileTypeClient usage
guidance, and package/transport documentation.

**Breaking preview type identity:** the existing 2.0-preview server
lookup `Opc.Ua.ISessionBindingProvider` becomes
`Opc.Ua.IServerSessionBindingProvider`. Server lookup consumers must
update their referenced type and rebuild. This is neither
source-compatible nor binary-additive for that preview type. The new
client capability is optional and adds no mandatory members to existing
ISession/ISessionClient/ITransportChannel contracts. This
preview-to-preview rename is documented in SessionBindings/Transports,
not in the 1.5-to-2.0 MigrationGuide.

**Ownership boundary:** no RequestLifetime changes,
certificate-manager/channel-entry adoption, BaseVariableState changes,
Method-result feature extraction, NodeManager batch/readiness or
browse-history retention, session restoration, registry federation, WoT
conversion, or WoT runtime/planners/events.
DependencyInjection/ResourceIsolation/index changes are lookup/link
closure only. SessionManager's PR hunk changes only its implemented
lookup-interface name; newer master public diagnostic masking is not
replaced.

## 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))._

- Part of #4511: user-approved combined groups 5+6 Wave A extraction.
This PR does not close the umbrella or publish Wave B.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
- [x] I have addressed **all** PR feedback received.

### Review qualification

Review fixes are published at
**`6b0eb1d5c32a439300fbcaff974b9af8b909161b`**, changing eight
already-owned files. All five received review threads were replied to
and resolved after verification. Factory selector installation and
target-selection-plus-commit share the root publication gate, with
consistent root→image release/capture ordering. TypeTable selector
installation and final mutation routing share its existing gate. Native
bound channel validity uses volatile observations; the two owned XML
defects are corrected.

| Requirement | Evidence |
|---|---|
| Selector installation must not hide TypeTable mutations |
`SelectorInstalledDuringNodePreparationReceivesMutation`: old Add
routing failed on both TFMs; corrected routing passes on both within
**148/148** factory/TypeTable controls |
| Selector installation must not race factory commit routing | Static
common-root-gate/order proof plus baseline-GREEN
`BuilderCapturedBeforeOwnershipUsesSelectedFactory`,
`ViewOwnerReleasePreservesRegistrationsAndAllowsReuse`,
`ViewOwnerReleaseCanRetryAfterPendingPublication`,
`PublicationProtectsPendingAndRetiredFactoryImages` |
| Lock-free validity must observe owner transitions | Static
volatile-read reasoning plus native
`BoundRequestCannotDispatchWhileNativeReplacementIsPendingAsync`,
`BoundResponseRejectsInvalidationAfterNativeDispatchAsync`,
`BoundClientCannotRetryAcrossFaultedManagedEntryReplacementAsync`:
**12/12 each TFM**; Core binding/pooled ownership controls **17/17 each
TFM** |
| Correct owned XML documentation | “an unmanaged” and one multiline
`ReferenceUpdate.Next` summary; scoped whitespace/INFO and build
evidence below |

Factory controls are **not** claimed as a deterministic factory RED, and
public transport controls are **not** claimed as a deterministic
weak-memory RED. No private-lock reflection, artificial production seam,
or source-name assertion was added. The TypeTable RED uses the real
`ILocalNode.NodeClass` callback during node preparation, and both
expected RED receipts/TRX were retained.

All accepted review runs use the unchanged admitted SDK wrapper, normal
project references, sole mutex, one node/no shared compiler, finite
resource guards and canonical short-C build outputs. Source hashes were
frozen per command and matched the committed bytes afterward. SDK
ownership was released **before** commit/push/review replies. No
automatic merge was requested.

Scoped whitespace passed across the four affected projects. Review INFO
classification is **0 owned findings / 13 untouched baseline findings
excluded** (whole-file formatter exits 1,1,0,0); no baseline
RCS1140/RCS0055 expansion or suppression. The final normal net10 public
Client/Core/Types trim/AOT-analyzer closure passed **0 warnings / 0
errors**. This is not a NativeAOT publish/run.

<details>
<summary>Accepted review command payloads and results</summary>

These exact argument payloads were executed through the unchanged
guarded SDK wrapper. `$proof` expands to the protected results-directory
below. Successful explicit builds of the same source preceded the
`--no-build` runs.

```powershell
$proof = 'C:\Users\mschier\.copilot\session-state\a3b74048-c52f-4c87-8773-7a46c9ab0087\files\qualification-review-4752'

# Exit 0: 148 passed, 0 failed
dotnet test tests\Opc.Ua.Types.Tests\Opc.Ua.Types.Tests.csproj -f net48 -p:CustomTestTarget=net48 -p:UseArtifactsOutput=true -p:ArtifactsPath=C:\cp56-a3b7-v2 -nr:false --no-restore --verbosity minimal --filter "FullyQualifiedName~EncodeableFactorySnapshotTests|FullyQualifiedName~TypeTableTests" --logger "trx;LogFileName=review-types-green-net48.trx" --results-directory $proof

# Exit 0: 148 passed, 0 failed
dotnet test tests\Opc.Ua.Types.Tests\Opc.Ua.Types.Tests.csproj -f net10.0 --no-restore --no-build --filter "FullyQualifiedName~EncodeableFactorySnapshotTests|FullyQualifiedName~TypeTableTests" --logger "trx;LogFileName=review-types-green-net10.trx" --results-directory $proof -p:CustomTestTarget=net10.0 -p:UseArtifactsOutput=true -p:ArtifactsPath=C:\cp56-a3b7-v2 -nr:false --verbosity minimal

# The following two per-TFM payloads each exited 0:
# Core: 17/17 net48 and 17/17 net10.0; Client: 12/12 net48 and 12/12 net10.0
foreach ($tfm in @('net48', 'net10.0')) {
    dotnet test tests\Opc.Ua.Core.Tests\Opc.Ua.Core.Tests.csproj -f $tfm --no-restore --no-build --filter "FullyQualifiedName~SessionBindingResponseTests|FullyQualifiedName~SessionBindingContextTests" --logger "trx;LogFileName=review-actual-core-green-$tfm.trx" --results-directory $proof -p:CustomTestTarget=$tfm -p:UseArtifactsOutput=true -p:ArtifactsPath=C:\cp56-a3b7-v2 -nr:false --verbosity minimal
    dotnet test tests\Opc.Ua.Client.Tests\Opc.Ua.Client.Tests.csproj -f $tfm --no-restore --no-build --filter "FullyQualifiedName~BoundRequestCannotDispatchWhileNativeReplacementIsPendingAsync|FullyQualifiedName~BoundResponseRejectsInvalidationAfterNativeDispatchAsync|FullyQualifiedName~BoundClientCannotRetryAcrossFaultedManagedEntryReplacementAsync" --logger "trx;LogFileName=review-actual-client-green-$tfm.trx" --results-directory $proof -p:CustomTestTarget=$tfm -p:UseArtifactsOutput=true -p:ArtifactsPath=C:\cp56-a3b7-v2 -nr:false --verbosity minimal
}

# Exit 0: 0 warnings, 0 errors
dotnet build src\Opc.Ua.Client\Opc.Ua.Client.csproj -f net10.0 -p:CustomTestTarget=net10.0 -p:UseArtifactsOutput=true -p:ArtifactsPath=C:\cp56-a3b7-v2 -nr:false --no-restore --verbosity minimal
```

The six expanded GREEN commands, exact results/TRX hashes and two
expected RED commands are retained in
`qualification-review-4752\qualification-summary.json`, SHA256
`C5E71A4D8D37BAC8803F6DF38B6BCE2B70F3D0AFD5DEC8493FAE9DB440DCFB5A`.
Committed/qualified byte identity is in `publication-identity.json`,
SHA256
`CD9515FE96703F8B241F2B7B9B71F73EF0FF2626C2C8BCCE40307971A8F8E809`.
Per-command raw exits, guards, hashes and reports are retained outside
disposable build roots.

For each record in the protected `format-inputs.json` (Types/Core/Client
libraries and Types.Tests), the recorded Project/Include values expand
these exact payloads:

```powershell
# Workspace properties recorded with the formatter receipts:
$env:CustomTestTarget = 'net10.0'
$env:UseArtifactsOutput = 'true'
$env:ArtifactsPath = 'C:\cp56-a3b7-v2'

# All four exit 0
dotnet format whitespace $Project --no-restore --verify-no-changes --verbosity minimal --include $Include

# Exits 1,1,0,0 due only to untouched baseline findings; owned=0, baseline=13
dotnet format $Project --no-restore --severity info --verify-no-changes --verbosity minimal --report "$proof\formats\review-info-$i" --include $Include
```

Initial fresh matrix evidence remains separately identified and
unchanged: Types274/Core119/Client151/server137 net10;
Types274/Core119/Client151/server135 net48, all passing. Qualification
base remains `0dff94bd378e79b8cf1a47e1aaf340f9b4b40048`; the initial
published head was `9fee4583`. All 16 initial exact command
arrays/results/TRX hashes remain in protected
`qualification-v2\qualification-summary.json`, SHA256
`88E10240C20049B59A3401BE007C6528A85DF2F3DCFAF9D11D908CEF2946DA4E`.

Failures/incidents remain retained rather than relabeled as success:
original disappeared-root historical counts are invalidated; the
large-TRX controller DOM-parser failure is preserved separately from
accepted streaming receipts; the review argument-array
defect/default-D-output controls are preserved but excluded from
canonical review qualification. Correctly separated argument rechecks
produced the accepted short-C Core/Client receipts. The sole SDK wrapper
was not changed.

Full UA.slnx, measured coverage increase, CLA verification, NativeAOT
publication and current-head/master CI/CodeQL remain unclaimed. Actual
merge—not resolved review threads—unlocks Wave B.

</details>
2026-10-13 06:25:43 +02:00
Marc Schier 184f19a2b0 Add complete method invocation results and resolved diagnostics (#4747)
# Description

`MethodInvocationResult` carries the operation result,
declaration-ordered outputs and optional position-preserving input
results. Asynchronous callbacks retain the actual receiver, cancellation
token and resolved diagnostic strings. Fluent predefined, typed,
instance, reference-child, resolved and virtual method builders reject
conflicting handlers in either registration order and never overwrite
materialized handlers. Direct configuration remains available.

Shared Call-result assembly retains input diagnostics, including useful
text on Good input positions, and requested operation diagnostics on
Good results. Diagnostic encoding preserves nested Good-status text,
status information bits and the outer-inclusive depth limit. Request
admission clears client-supplied internal diagnostic permission flags
before early returns or validation failures; admitted sessions grant the
flag only after the existing administrator-role checks.

Includes corresponding unit/integration regressions, complete XML API
documentation, and method-result guidance consolidated with the fluent
APIs in `docs/NodeManagers.md`. No WoT
receiver/projection/remote-execution, event-readiness/native-admission,
or bulk/history implementation is included.

## Related Issues

Part of the user-approved two-wave extraction plan tracked by #4511.

_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))._

- Related to #4511.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
- [x] I have addressed **all** PR feedback received.
2026-10-12 18:26:04 +02:00
romanett 0dff94bd37 Server quick wins from the o6 benchmark gap analysis: admission sizing, sampling permission cache, routed Read dispatch (#4743)
The o6-automation benchmark gap analysis listed several server quick
wins that need no wire or public API change. This PR implements three of
them. The 2.0 server now passes the benchmark's 10 clients × 1000
outstanding Reads test with the benchmark's own queue sizing. Its 100 Hz
sampling capacity grows about 7–10× on the same machine, and a
single-value Read allocates 8 % less.

## Results

Paired A/B against `master` (071660354): alternating builds, 3 rounds (5
for Read), medians, 24-core machine shared with other sessions.
Allocated bytes and CPU per operation are the reliable signal here.
Throughput varied up to 3× between rounds of the same build, so it is
listed only where the result is pass/fail.

| Scenario | Server alloc / op | Server CPU / op | Result |
|---|---|---|---|
| o6 `sub_client`, 2048 counters, 10 ms sampling, 1 s publishing |
**2309 → 111 B / sample (−95 %)** | **3.75 → 1.14 µs / sample (−70 %)**
| PASS on both |
| Harness `counters`, 2048 items, 10 ms / 1 s | 232 → 11.2 KB /
notification (−95 %) | −74 % | GC pause 644 → 24 ms in 12 s |
| **o6 sampling capacity** (largest count with every item ≥ 99 % of
samples, doubling from 1024, then bisect) | | | **2176–2304 →
16384–22528 items** (2 searches each) |
| o6 `client`, 10 × 1000 outstanding Reads, `MaxQueuedRequestCount =
10000` | | | **master fails 3/3 (BadServerTooBusy), this PR passes 3/3**
(31–36k req/s) |
| o6 `client`, 10 × 100 outstanding Reads | 7823 → 7556 B (−3 %) | ±0 |
|
| Read, 1 value (20 sessions) | 6534 → 6020 B (**−8 %**) | −1 % | |
| Read, 100 values | −1 % | ±0 | |
| Write, 100 values | −1 % | −5 % | |

For reference, open62541 (single thread, same Windows machine and native
client) sustained 5632 items in the gap analysis.

## Changes

### 1. `MaxQueuedRequestCount` admits that many established requests
(Balanced / TrustedReservations)
- `ServerResourceIsolationOptions.CreateRuntimePlan` carved the
bootstrap, reconnect, control and trusted floors out of the configured
queue, so established sessions could queue only `N − 3`. The default
totals of the decoded-request admission stages (RequestQueue,
RequestQueueBytes, ParkedRequest) now add the floors on top; the shared
capacity equals the configured value.
- `FairRequestQueue` takes its physical bound from the provider's stage
capacity (internal `IResourceIsolationCapacitySource`), so the protected
entries stay reachable when the shared part is full.
- RequestExecution keeps its floors inside the worker limit, so an idle
worker remains for protected requests. Explicit `Stages[].Capacity`
overrides keep their meaning as absolute totals including the floors.

### 2. Sampling without a role permission check per sample
- Since #4503 every sampling cycle called `ValidateRolePermissionsAsync`
for every item. For a `CustomNodeManager2` node that built full node
metadata (13-attribute read, namespace defaults via sync-over-async,
three nested node manager operations) only to return Good: about 80 % of
the 2.3 KB per sample.
- Each sampling loop now keeps per-item state between cycles:
ReadValueIds, result buffers and the last permission verdict. A verdict
is reused while the item's Session, effective identity and node handle
are unchanged and no permission change was signalled:
- `NodeState` bumps an internal version counter when `RolePermissions`
or `UserRolePermissions` of any node change (setter or Write);
- `IConfigurationNodeManager.DefaultPermissionsChanged` (namespace
defaults);
- a new `EffectiveIdentity` instance (ActivateSession with another user,
or roles refreshed after `RoleConfigurationChanged`).
- Independently, every item is revalidated once per second, spread over
the cycles, which bounds the delay for permissions that a node manager
computes without a signal (`OnReadRolePermissions`, custom
`ValidateRolePermissionsAsync`).
- The loop reuses its item snapshot until items are added or removed,
reads all items of one owner with one context instead of a LINQ
`GroupBy` (items moved to another session by TransferSubscriptions still
use the per-owner path), marks disabled items processed instead of
rebuilding the list, and checks for a detached loop without taking the
group lock.
- `Opc.Ua.Types` grants `InternalsVisibleTo` to `Opc.Ua.Server` for the
version counter.

### 3. Read and Write call only the node managers routed for the request
- `NodeManagerServiceDispatcher.ReadAsync`/`WriteAsync` called every
node manager. Every `AsyncCustomNodeManager` (configuration,
diagnostics, core, …) then copied the system context and allocated a
dictionary and a list, even with none of the requested nodes in its
namespaces.
- Validation now collects the namespace routes of the valid operations
and the dispatcher skips node managers outside them. Every manager of a
requested namespace is still called in dispatch order, so overlapping
managers keep their precedence. A namespace without a route still calls
every node manager, which keeps `BadNodeIdUnknown` and custom routing
unchanged.
- Not done: reusing the handle resolved during validation inside
`ReadAsync` needs a new node manager overload (public API), so nodes are
still resolved twice. HistoryRead and Call keep the old dispatch: Call
routes by object and method, and HistoryRead releases continuation
points per manager.

## Behaviour notes
- **`MaxQueuedRequestCount`** keeps its 1.5.x meaning again: established
sessions can have that many decoded requests waiting. Balanced and
TrustedReservations size the RequestQueue stage at
`MaxQueuedRequestCount + floors` (for example 10,003 for 10,000). A
deployment that relied on the smaller queue lowers
`MaxQueuedRequestCount` or sets the RequestQueue `Capacity`.
`docs/MigrationGuide.md`, `docs/ResourceIsolation.md` and
`docs/ServerScalability.md` are updated.
- **Permission changes for sampled items** still apply within one or two
sampling cycles when they come through
`NodeState.RolePermissions`/`UserRolePermissions`, namespace default
permissions, or a new effective identity. Permissions that a node
manager computes without changing those (for example
`OnReadRolePermissions` or a custom `ValidateRolePermissionsAsync`)
apply within one second instead of on the next sample.
`docs/NodeManagers.md` describes it.
- **Custom node managers** that process Reads or Writes of nodes in
namespaces they did not register receive those calls only while some
valid node of the request is in an unrouted namespace. Such a manager
registers its namespaces with `RegisterNamespaceManager` (documented in
`docs/NodeManagers.md`).

## Testing
- New unit tests:
- `RuntimeResourceIsolationTests`: plan sizing per mode, explicit
capacities, and a fair queue that admits exactly `MaxQueuedRequestCount`
requests from four owners, rejects the next and still admits bootstrap
and reconnect.
- `SamplingGroupPermissionCacheTests`: verdict reuse, revocation through
node RolePermissions in the same cycle, namespace default change,
identity change, periodic revalidation, disabled items. Each change is
injected inside the Read of a known cycle, so the tests do not depend on
timing.
- `NodeManagerDispatchRoutingTests`: non-owning managers are skipped,
several owners keep result order, an unrouted namespace still calls
everyone, two managers of one namespace keep their precedence, Write.
- net10.0: `Opc.Ua.Server.Tests` 8462 passed,
`Opc.Ua.Subscriptions.Tests` 643 passed, `Opc.Ua.Sessions.Tests` 851
passed / 379 skipped, `Opc.Ua.Core.Tests` (Stack.Server) 1858 passed,
`Opc.Ua.Stress.Tests` Contract|Integration 45 passed; 0 failures.
- net48 build of `Opc.Ua.Server.Tests` clean; `dotnet format whitespace`
clean.
- Measured with `perf/ServerLoadHarness` and the o6 scenarios (`o6read`,
`o6counters`) from the gap-analysis harness, which is not part of this
PR.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-12 08:52:09 +00:00
Marc Schier 1bb4bdca1d Add Machine Vision Parts 1 and 2 (#4733)
# Description

Implement the released [OPC
40100-1](https://reference.opcfoundation.org/specs/OPC-40100-1) and [OPC
40100-2](https://reference.opcfoundation.org/specs/OPC-40100-2)
specifications with generated models, provider-backed runtimes, typed
clients, MCP workflows, and DI/Machinery integration.

- **Part 1 stays in `Opc.Ua.Vision`** and its client/server packages
alongside the distinct Perception model. Provide control/acquisition
state machines, jobs and synchronized steps,
recipe/product/configuration/result management, file transfers,
diagnostics, events, and conditions.
- **Part 2 is in `Opc.Ua.MachineVision`, `.Client`, and `.Server`.**
Provide asset categories, identification, image-handling aspects,
health/maintenance data, topology, and transactional updates. The base
Vision assemblies do not reference these optional packages; the Part 2
wire model does not depend on Part 1.
- Preserve the release-pinned model bytes, wire namespaces and NodeIds.
Perception types are in `Opc.Ua.Vision.Perception`; the AMCM generated
namespace remains `Opc.Ua.Vision.MachineVision.AMCM`, and asset
client/server extension namespaces remain `Opc.Ua.Vision.Client` and
`Opc.Ua.Vision.Server`.
- Use `AddOpcUaMachineVision` and `AddOpcUaMachineVisionAMCM` for model
loading and factory registration. Each has node-collection,
encodeable-factory-builder and node-state-factory-builder overloads.
These short entry points delegate to the generated implementations;
existing namespace-derived generated names remain available for
compatibility.
- Support multiple independent named systems/assets under one
namespace-owning manager. Reuse injectable providers, file binding,
bounded memory stores, optional transactional `IFileSystemProvider`
persistence, state machines, telemetry and conformance infrastructure.
- Keep one `docs/Vision.md` guide, titled `Machine Vision (OPC 40100-1
and OPC 40100-2)`, and one `Opc.Ua.Mcp.Vision` package. Include
deterministic server/client samples.
- Expose 17 Machine Vision MCP tools, including capabilities/status,
bounded relationships and observation, complete small-file
uploads/downloads, management, explicit control, conditions, and chunked
transfers. Catalogue counts: 39 Vision-specific, 43 with connection
tools, 81 Vision+Robotics, 155 Full. Every Machine Vision wire parameter
has a schema description.

**Compatibility and limits:** `AddVision()` remains Perception-only
unless released parts are selected. Standalone Part 2 uses
`AddVision().AddMachineVision()`; Machinery composition uses
`AddVisionToMachinery()`. Existing tool defaults and command signatures
are preserved. Observation owns and cleans up its subscription: 5
seconds/50 notifications by default, capped at 60 seconds/100
notifications. Complete-file tools are capped at 1 MiB; larger files use
chunked transfers. Domain Error values remain distinct from UA service
failures.

**Versioning:** the seven Vision/MachineVision/MCP packages and their
Debug variants follow the repository root version instead of being
forced to preview. Vision.OpenUsd and its descendants remain
preview-only. Development builds still inherit the root prerelease
version. No release version, tag, release branch, publication policy, or
feed promotion is changed.

**Review actions:** all fourteen review threads have action/evidence
replies and are resolved. Changes include the unified guide, Perception
namespace, separate Part 2 packages and final naming, multi-system
ownership explanation, interrupted-write cleanup, observer failure
isolation, complete MCP parameter descriptions, and explicit package
inventory. The preview-layout migration topic and the requested
ReleaseProcess caveat were removed. The test Publish collector now
retries recognized transient failures within one cancellation budget and
propagates other exceptions. Commit 69b1f5db9 applies the requested
short loader names and renames standalone hosting to `AddMachineVision`,
with callers, tests and documentation updated. The intervening master
merge is preserved.

### Verification

**Latest API naming changes, verified locally:**

| Scope | Result |
| --- | --- |
| Full Vision suite, net10 | 572 passed, 1 existing skip, 0 failed |
| Full Vision suite, net48 | 515 passed, 0 skipped, 0 failed |
| Final loader/hosting cases after cross-TFM null-guard adjustment | 9
passed, 0 failed, 0 skipped |
| Machine Vision MCP and profile cases | 198 passed, 0 failed, 0 skipped
|
| Main and MCP AOT test-project compilation | Both built with 0
warnings/errors |
| MCP AOT companion, managed execution | 5 passed, 0 failed, 0 skipped;
not claimed as native execution |

`ModelLoaderNamesRegisterTypedFactories`,
`ModelLoaderNamesRejectNullArguments`, and
`GeneratedModelsLoadTogetherAndCreateTypedInstances` cover all six
loader overloads, fluent return identities, typed instances, namespace
coexistence and null guards. Existing standalone Part 2 tests verify
idempotent registration, one-owner enforcement and null handling through
`AddMachineVision`. No source-generator implementation, CLR namespace,
wire identity or model payload was changed for these naming updates.

The current 69b1f5db9 revision is running
[CI](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/38165826937),
[package
validation](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/38165823359),
[MCP
usability](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/38165826874),
[CodeQL](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/38165826906),
and [Images
CI](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/38165826884).
These runs are not claimed as completed results.

**Earlier completed verification:** all seven default-TFM package
archives were inspected after the package rename: exact IDs, 27 clean
DLLs, correct dependencies/readmes/licenses, and unchanged pinned model
hashes. [CI on
c75ec4fa6](https://github.com/OPCFoundation/UA-.NETStandard/actions/runs/38142519760)
passed, including the formerly failing Linux batch and required summary.
Its unchanged coverage gate passed at **88.56% lines, 78.96% branches,
84.28% patch** against the 75% patch floor. The later
bounded-Publish-helper regressions reproduced 13 failures before the fix
and passed afterward; the full mainline triggering fixture passed 67
tests on each of net10/net48. These are historical results, not current
full-matrix results.

<details>
<summary>Executed API naming validation commands and outcomes</summary>

Run from the worktree root using the established artifact trees.
Dependency builds were performed before the no-build full net10 run; the
focused loader/hosting selection was rebuilt and rerun after the final
null-guard adjustment.

```powershell
$files = 'C:\Users\mschier\.copilot\session-state\deb2ba10-b0e9-4a44-8783-8331bc850814\files'
$env:DOTNET_CLI_USE_MSBUILD_SERVER = '0'
$env:TEMP = 'C:\Temp\mv-deb2\followup'
$env:TMP = $env:TEMP

# Passed: 572; Failed: 0; Skipped: 1.
dotnet test tests\Opc.Ua.Vision.Tests\Opc.Ua.Vision.Tests.csproj -c Release -f net10.0 --no-build --no-restore --artifacts-path artifacts\vision-followup -p:CustomTestTarget=net10.0 -p:UseSharedCompilation=false -m:1 -nr:false --logger 'console;verbosity=minimal' --logger trx --results-directory "$files\vision-api-names-net10" -- 'NUnit.WorkDirectory=C:\Temp\mv-deb2\followup'

# Passed: 9; Failed: 0; Skipped: 0, on the final source.
dotnet test tests\Opc.Ua.Vision.Tests\Opc.Ua.Vision.Tests.csproj -c Release -f net10.0 --no-restore --artifacts-path artifacts\vision-followup -p:CustomTestTarget=net10.0 -p:UseSharedCompilation=false -m:1 -nr:false --filter 'FullyQualifiedName~MachineVisionModelTests|FullyQualifiedName~StandalonePartTwoRegistrationUsesOneOwnerAndOneModelProvider|FullyQualifiedName~StandalonePartTwoRequiresRegistrationAndRejectsCompetingOwnership' --logger 'console;verbosity=minimal' --logger trx --results-directory "$files\vision-api-names-final-model" -- 'NUnit.WorkDirectory=C:\Temp\mv-deb2\followup'

# Passed: 198; Failed: 0; Skipped: 0.
dotnet test tests\Opc.Ua.Tools.Tests\Opc.Ua.Tools.Tests.csproj -c Release -f net10.0 --no-restore --artifacts-path artifacts\vision-followup -p:CustomTestTarget=net10.0 -p:UseSharedCompilation=false -m:1 -nr:false --filter 'FullyQualifiedName~VisionMachineToolsTests|FullyQualifiedName~McpHostBuilderTests|FullyQualifiedName~McpToolProfileCompositionTests' --logger 'console;verbosity=minimal' --logger trx --results-directory "$files\vision-api-names-final-mcp" -- 'NUnit.WorkDirectory=C:\Temp\mv-deb2\followup'

$env:TEMP = 'C:\Temp\mv-deb2\followup48'
$env:TMP = $env:TEMP

# Passed: 515; Failed: 0; Skipped: 0.
dotnet test tests\Opc.Ua.Vision.Tests\Opc.Ua.Vision.Tests.csproj -c Debug -f net48 --no-restore --artifacts-path "$files\solution-net48-artifacts" -p:CustomTestTarget=net48 -p:UseSharedCompilation=false -m:1 -nr:false --logger 'console;verbosity=minimal' --logger trx --results-directory "$files\vision-api-names-net48-final" -- 'NUnit.WorkDirectory=C:\Temp\mv-deb2\followup48'
```

Opt-in long-running/stress/durable tiers have not been rerun locally;
the unqualified **all tests** checklist item remains open. Original
implementation matrix counts are not presented as current results.

</details>

## Related Issues

- Fixes #4732.

The requester reviewed and approved the implementation plan and
subsequent packaging/API decisions in the development session. The
tracking issue records the design; maintainer architectural
discussion/sign-off there is still pending. This PR remains a draft.

## Checklist

_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._

- [ ] 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.
2026-10-12 07:01:27 +00:00
Cristi Pogacean 9344354aaa Fix empty LocalizedText binary field encoding (#4709)
# Description

Omit empty `Locale` and `Text` fields from the OPC UA Binary
DataEncoding for `LocalizedText`, as required by OPC 10000-6, Section
5.2.2.14, Table 24. Add wire-format tests for empty and non-empty
fields, including translation-backed localized text.

Validation:

- `git diff --check` passed before commit.
- `dotnet build tests\Opc.Ua.Types.Tests\Opc.Ua.Types.Tests.csproj
--framework net10.0 --no-restore --verbosity minimal
-p:NuGetAudit=false` could not complete because access to
`https://api.nuget.org/v3/index.json` failed with `NU1301` and a TLS
handshake error.

## Related Issues

No related 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.
- [x] I have addressed **all** PR feedback received.

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-10-10 08:05:11 +02:00
Marc Schier 9099aee13e Fail CI when a test fixture's setup or teardown fails (#4723)
# Description

`get-test-verdict.ps1` accepts a non-zero `dotnet test` exit whenever
the TRX counters show no failure, on the assumption that the host died
at exit after every teardown had run. A failed fixture setup or teardown
breaks that assumption. The assembly-level `[OneTimeTearDown]`
certificate leak check fails after its tests passed, no TRX counter
records it, and the host exits 1. In the last 10 master runs, CI
accepted exactly that as an "at-exit stall" for `Opc.Ua.Gds.Tests` and
`Opc.Ua.Server.Tests` on every leg (net48, and net10.0 on Windows,
Linux, and macOS). #4719 fixed the Server.Tests leak; #4721 fixes the
GDS leak.

The NUnit adapter reports such a failure as a TRX run message, `<RunInfo
outcome="Error"><Text>TearDown failed for test fixture
Opc.Ua.Gds.Tests.LeakDetectionSetup</Text></RunInfo>`, followed by a
second one with the failure message. For a setup failure it writes
`Setup failed for test fixture …`.

Changes:

- `Measure-TestResults` collects these messages. `Get-TestRunVerdict
-FixtureFailures` rejects a run that has any of them, whatever the exit
code, and names the fixture in the reason.
- A host that dies at exit after a clean run is still tolerated. The
only other tolerated case in the last 10 master runs,
`Opc.Ua.Client.Tests` on net48 in run 37835429177, logged "Test host
process crashed" and stays tolerated.
- `Measure-TestResults` and `Get-CounterValue` move from
`run-dotnet-tests.ps1` to the dot-sourced `get-test-verdict.ps1`, so
`CiTestVerdictTests` can feed them TRX files. The source check of the
counter set becomes a behavioral test.
- `docs/DeveloperGuide.md` describes the rule.

**Merge order:** after #4727 (#4719 and #4721 are on master). With #4721
merged, this PR's CI still rejects `Opc.Ua.Gds.Tests` on net48: eight
`PushTest` fixtures fail in `TearDown` and leak 88 certificates when
their setup is ignored, which master accepted as an "at-exit stall".
#4727 fixes them. On every other leg, `Opc.Ua.Gds.Tests` now passes
under the rule.

### Validation

| Command | Result |
| --- | --- |
| `dotnet test tests/Opc.Ua.Tools.Tests -f net10.0 --filter
FullyQualifiedName~CiTestVerdictTests` with the scripts from master | 6
new tests fail, 13 pass |
| Same with this change | 19 passed |
| `Measure-TestResults` and `Get-TestRunVerdict` on the TRX of a full
`Opc.Ua.Gds.Tests` run without #4721, exit code 1 | Rejected: `1 test
fixture setup or teardown failure(s): TearDown failed for test fixture
Opc.Ua.Gds.Tests.LeakDetectionSetup.` |
| Same on the TRX of a run with #4721, exit code 1 | Tolerated, as
before |
| CI of this PR before #4721 merged | `Opc.Ua.Gds.Tests` rejected on all
four legs for `TearDown failed for test fixture
Opc.Ua.Gds.Tests.LeakDetectionSetup`; every other project passed |
| CI after merging master with #4721 (0e8ef033a) | `Opc.Ua.Gds.Tests`
passes on Linux, Windows and macOS net10.0; on net48 it is rejected for
9 fixture failures in `PushTest` and `LeakDetectionSetup`, fixed by
#4727 |
| `dotnet test tests/Opc.Ua.Tools.Tests -f net10.0` | 947 passed, 1
skipped, 1 failed:
`CiMatrixScriptTests.JobTimeoutBoundsEveryProjectsCombinedBudgetAsync("full")`,
which this change does not touch; it passes on rerun, alone and with
`CiMatrixScriptTests` and `CiTestVerdictTests` (40 passed) |

## Related Issues

- No tracking issue. Follows #4719 and #4721.

## 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.
- [ ] I have addressed **all** PR feedback received.

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: marcschier <11168470+marcschier@users.noreply.github.com>
2026-10-09 22:24:49 +00:00
Cristi Pogacean 2cdf0de97f Fix scoped certificate-store resolution in GDS push operations (#4726)
# Description

Fix the remaining GDS push certificate paths that bypass instance-scoped
certificate stores, while preserving OPC UA 1.05.07 trust and
transaction requirements.

- Use the configured resolver/registry for previous-key loading, slot
resolution, application-store commit/rollback, issuer
import/compensation, and rejected-store opening.
- Validate application-certificate uploads through the configured
manager and the group's registered trust scope, instead of a temporary
manager that cannot see custom providers.
- Isolate per-call `AcceptError` validation cores from normal cached
trust decisions. Part 12 installation-time acceptance must neither reuse
nor populate the connection-validation cache.
- Compensate the application-certificate swap if opening the issuer
store fails, not only if importing an issuer fails.
- Add scoped-provider, cross-group trust, cache-isolation, and
compensation regressions. Reuse the portable PEM writer and short
temporary PKI paths so the tests work on .NET Framework too.
- Use source-generated failure logging without private-key bytes, and
document custom-store/pending-key requirements.

The branch starts at master `7f14fb864fc93532f3dbab1e1b5e2ba9b5f605c5`.
It excludes the unrelated LocalizedText commits, the local handoff, PLC
changes, logs, keys, certificates, and build outputs. No public API,
dependency, package version, global provider registration, or analyzer
configuration is changed.

### Specification review

The online Part 12 reference identifies version **1.05.07**. This is a
focused review and regression validation of the changed behavior, **not
a claim of complete stack conformance or CTT certification**.

| Requirement | Review / evidence |
| --- | --- |
| [Part 12,
7.10.5](https://reference.opcfoundation.org/specs/OPC-10000-12/7.10.5):
validate application certificates using the associated TrustList; ignore
the supplied issuer list | Existing issuer-argument regressions
retained. New flat-layout scoped-provider cases accept a CA installed in
the selected trusted/issuer store and reject one installed only in
another scope. |
| [Part 4,
6.1.3](https://reference.opcfoundation.org/specs/OPC-10000-4/6.1.3) and
Part 12, 7.10.5: suppressible installation errors must not bypass normal
peer trust or non-suppressible failures | Missing-issuer,
signature/revocation, explicit-trust, and validation-core tests; new
two-way cache-isolation cases with `UseValidatedCertificates = true`;
normal peer validation remains untrusted after issuer-only push
acceptance. |
| Part 12, 7.10.5: matching private key, encrypted channel and
SecurityAdmin | Existing access/key/type tests retained; scoped
own-store upload cases cover no uploaded key and PEM. PFX and
regenerated-key cases remain in the selected suite. |
| [Part 12,
7.10.2](https://reference.opcfoundation.org/specs/OPC-10000-12/7.10.2),
[7.10.9](https://reference.opcfoundation.org/specs/OPC-10000-12/7.10.9),
and
[7.10.11](https://reference.opcfoundation.org/specs/OPC-10000-12/7.10.11):
staging, ApplyChanges, cancellation, ownership and compensation |
Push/transaction/rollback suites; new custom-provider compensation cases
cover both issuer-import and store-open failure, retaining the old
application certificate and pre-existing issuers. |
| [Part 12,
7.10.7](https://reference.opcfoundation.org/specs/OPC-10000-12/7.10.7):
do not delete endpoint-referenced certificates | Existing ApplyChanges
endpoint-reference and delete/create replacement tests retained. |
| [Part 12,
7.10.10](https://reference.opcfoundation.org/specs/OPC-10000-12/7.10.10):
CSR key handling and persistence | Existing-key scoped CSR test, SDK
pending-key/cancel cases, and supporting PLC encrypted round
trips/restarts. Arbitrary custom backends still require a durable
pending-key implementation; the separate PLC implementation is not
included here. |

### Validation

Windows, .NET SDK 10.0.401, Release, NUnit/VSTest. Build analyzers
remained enforced: **no `WarningsNotAsErrors`, suppressions, or analyzer
downgrades**. `NuGetAudit=false` was needed because the local nuget.org
TLS connection failed; no repository audit setting was changed.

| Selection | Result |
| --- | --- |
| SDK GDS push/trust/transaction/rollback, net10.0 | **192 passed, 0
failed** |
| SDK certificate-manager/provider/explicit-trust/validation-core,
net10.0 | **180 passed, 0 failed** |
| SDK certificate-manager/provider/explicit-trust/validation-core, net48
| **180 passed, 0 failed** |
| SDK GDS push/trust/transaction/rollback, net48 | **192 passed, 0
failed** |
| Final portable-PEM/compensation tests, net10.0 | **5 passed, 0
failed** |
| Supporting PLC GDS/pending-key/compatibility selection, net10.0 | **29
passed, 0 failed** against this SDK source |

The PLC tests exercise encrypted UA calls, signed PEM/CSR updates,
persistence, fresh connections and restarts across Directory,
FlatDirectory and KubernetesSecret providers. The Kubernetes API is an
in-memory double, **not a real Kubernetes deployment**. PLC tests and
its durable pending-key implementation are local companion-repository
changes, not SDK PR contents or independently reproducible CI evidence
from this branch alone.

Commands below use the same isolated artifact locations as the
validation run, expressed relative to the user profile:

```powershell
$files = Join-Path $env:USERPROFILE '.copilot\session-state\003a7438-0312-4c10-beed-cd95c0fe400e\files'
$sdk = Join-Path $files 'sdk-build'
$net48 = Join-Path $files 'solution-net48'
$push = 'FullyQualifiedName~ConfigurationNodeManagerPushTests|FullyQualifiedName~ConfigurationNodeManagerPushValidationTests|FullyQualifiedName~PushComplianceRegressionTests|FullyQualifiedName~PushRollbackCancellationRegressionTests|FullyQualifiedName~PushConfigurationTransactionCoordinatorTests'
$manager = 'FullyQualifiedName~CertificateManagerTests|FullyQualifiedName~CertificateManagerExplicitTrustTests|FullyQualifiedName~CertificateManagerProviderResolutionRegressionTests|FullyQualifiedName~CertificateValidationCoreTests'

# Passed: 192/192.
dotnet test .\tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj -c Release -f net10.0 -m:1 --no-restore -p:GeneratePackageOnBuild=false -p:UseArtifactsOutput=true "-p:ArtifactsPath=$sdk" -p:NuGetAudit=false --filter $push

# Passed: 180/180.
dotnet test .\tests\Opc.Ua.Core.Tests\Opc.Ua.Core.Tests.csproj -c Release -f net10.0 --no-build --no-restore -p:UseArtifactsOutput=true "-p:ArtifactsPath=$sdk" --filter $manager

# Passed: 180/180.
dotnet test .\tests\Opc.Ua.Core.Tests\Opc.Ua.Core.Tests.csproj -c Release -f net48 --no-build --no-restore -p:CustomTestTarget=net48 -p:UseArtifactsOutput=true "-p:ArtifactsPath=$net48" --filter $manager

# Passed: 192/192 after the portable PEM writer and shorter temporary PKI paths.
dotnet test .\tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj -c Release -f net48 -m:1 --no-restore -p:CustomTestTarget=net48 -p:GeneratePackageOnBuild=false -p:UseArtifactsOutput=true "-p:ArtifactsPath=$net48" -p:NuGetAudit=false --filter $push

# Passed: 5/5 after final test portability changes.
dotnet test .\tests\Opc.Ua.Server.Tests\Opc.Ua.Server.Tests.csproj -c Release -f net10.0 -m:1 --no-restore -p:GeneratePackageOnBuild=false -p:UseArtifactsOutput=true "-p:ArtifactsPath=$sdk" -p:NuGetAudit=false --filter 'FullyQualifiedName~CertificatePushUsesScopedOwnStoreProviderAsync|FullyQualifiedName~ApplyCertificateSlotChangeSelfCompensatesWhenIssuerImportFailsAfterAppCertSwapAsync'

# Passed: 29/29; the companion project and this SDK had been built together first.
dotnet test C:\src\iot-edge-opc-plc\tests\opc-plc-tests.csproj -c Release --no-build --no-restore -p:UseLocalOpcUaStack=true -p:OpcUaSourceRoot=C:\src\UA-.NETStandard -p:UseArtifactsOutput=true "-p:ArtifactsPath=$sdk" --filter 'FullyQualifiedName~GdsPush|FullyQualifiedName~PlcPendingCertificateKeyStoreTests|FullyQualifiedName~PreviewCompatibilityTests'
```

The `--no-restore` / `--no-build` invocations require prior
restoration/build. The initially empty artifact-directory `--no-restore`
invocation produced no test execution and is **not** counted. Initial
compile/test portability failures were fixed before the final results
above.

Full-solution attempts did **not** pass:

```powershell
# Failed/incomplete: AMB server startup timed out in two tests; stopped after failures.
dotnet test .\UA.slnx -c Release -f net48 -m:1 -p:CustomTestTarget=net48 -p:GeneratePackageOnBuild=false -p:UseArtifactsOutput=true "-p:ArtifactsPath=$net48" -p:NuGetAudit=false

# Failed: NU1301 restoring OpenUsd-related projects due to nuget.org TLS handshake failure.
dotnet test .\UA.slnx -c Release -f net10.0 -m:1 -p:CustomTestTarget=net10.0 -p:GeneratePackageOnBuild=false -p:UseArtifactsOutput=true "-p:ArtifactsPath=$(Join-Path $files 'solution-net10')" -p:NuGetAudit=false
```

A retry through an already configured local package source progressed
further, but the OneFuzz nested publish did not inherit the audit
override and caused **210 setup failures (NU1900)**; the broad run was
stopped. These runs are not a clean full-suite result. AMB startup
failures have not been baseline-qualified and are not claimed to be
fixed by this PR.

`git diff --check` passed. A changed-file whitespace check reported
seven pre-existing diagnostics at lines 371-424 of
`CertificateManagerTests.cs`, outside this change (new tests start at
line 563); no unrelated formatting sweep was made.

**Remaining gates:** successful full solution on net48/net10.0,
quantitative coverage, Linux, required CI/CodeQL, and applicable
CTT/interoperability qualification. Keep this PR draft until the
required gates are resolved; the tests above do not establish 100% OPC
UA compliance.

## 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 #4725.
- Follow-up to #4546, #4530 and #4531 for remaining certificate-push
consumers.

## 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.

Tests were added and pass as recorded, but coverage was not measured.
CLA status is not asserted on behalf of the contributor.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-10-09 21:41:58 +02:00
Marc Schier 7f14fb864f Secure the UADP DataSetMetaData announcement on secured connections (#4712)
# Description

`MetaDataPublisher` encoded the DataSetMetaData announcement itself and
called `IPubSubTransport.SendAsync` directly. That bypassed the
connection's security wrapper and its fail-closed check. A WriterGroup
configured for `SignAndEncrypt` therefore announced its DataSet layout
(field names, types, version) unsigned and unencrypted. A secured
subscriber dropped the announcement (`Dropping unsecured inbound frame
... requiring SignAndEncrypt`, documented as an expected warning in
docs/PubSub.md), and any listener could read it. OPC 10000-14 §6.2.5.2
applies the WriterGroup's SecurityMode to the NetworkMessages it
publishes, and §7.2.4.6.3 carries the security of a discovery
announcement in its SecurityHeader.

Confirmed on the wire: the documented `udp-uadp` exchange sent secured
DataSetMessages plus one DiscoveryResponse (announcement type 2,
DataSetMetaData) with ExtendedFlags1 `0x81`, meaning the SecurityHeader
bit was clear.

Review feedback widened the scope to every UADP discovery message of a
secured connection, and to the diagnostics of secured messages.

Fix:

- `MetaDataPublisher` builds the announcement and hands it to the
connection (`PubSubConnection.SendMetaDataAnnouncementAsync`).
- One encode-and-secure step (`PubSubConnection.EncodeOutboundAsync`)
now serves data messages, discovery requests and responses, and the
announcements that UDP and Ethernet send to their transport-specific
discovery destination (ApplicationInformation, PublisherEndpoints,
PubSubConnection). On a connection configured for message security, it
applies the SecurityMode (`Sign`, or `SignAndEncrypt`) to UADP messages
and refuses to send any message it cannot secure.
- Before, a secured connection dropped its own discovery requests, so a
secured subscriber could not ask for metadata, writer configuration, or
endpoints. It also refused metadata and writer-configuration probe
responses, and sent the transport-specific announcements in plaintext.
- A discovery response or announcement that cannot be secured or sent is
logged (`DiscoveryMessageNotSent`, Warning) and dropped. Securing
announcements makes them depend on a current key; without this, a key
provider with no key yet, for example before a Security Key Service
delivers the first key, made `StartAsync` fail, and a probe response
that could not be secured ended the receive loop. Requests sent through
`RequestDiscoveryAsync` still throw to the caller.
- Secured messages are counted in `SentNetworkMessages` and
`SentDataSetMessages` like unsecured ones. Before, they bypassed the
encoder that counts them, so secured data messages were never counted.
- `UadpDiscoveryCoder` can encode a discovery message with the
SecurityHeader bit set, and reports the security boundary after the
PublisherId (and DataSetClassId), which is where
`UadpDecoder.TryReadOuterPrefix` ends the prefix.
`UadpEncoder.EncodeWithSecurityBoundary` accepts discovery messages.
- The receive path is unchanged: it already unwraps secured discovery
frames and registers authenticated metadata.
- Not changed: the MQTT last-will status message is registered with the
broker when the connection opens and published later, so it cannot carry
a current SecurityHeader; it stays unsecured.
- docs/PubSub.md no longer lists the unsecured-frame warning. It
describes how the SecurityMode applies to announcements and discovery
(`Sign` authenticates; `SignAndEncrypt` also encrypts) and the last-will
exception.

Tests:

-
`MetaDataPublisherTests.UadpPathSecuresTheAnnouncementOfASecuredWriterGroupAsync`:
the announcement of a SignAndEncrypt WriterGroup carries a
SecurityHeader, does not contain the DataSet name in cleartext, and
unwraps and decodes with the subscriber's keys. Before the fix, the
announcement had no SecurityHeader.
- `MetaDataPublisherTests.SecuredNetworkMessagesAreCountedAsSentAsync`:
before the fix, `SentNetworkMessages` read 0 on a secured connection.
-
`PubSubDiscoveryTests.SecuredSubscriberDiscoversSecuredPublisherWithoutPlaintextFramesAsync`:
a secured subscriber and a secured publisher, connected through an
in-memory transport that also sends announcements to a separate
destination, discover metadata, writer configuration, and endpoints, and
no frame lacks a SecurityHeader. Before the fix, the metadata request
was dropped. With only the announcement change reverted, the
PublisherEndpoints response was dropped.
-
`PubSubDiscoveryTests.StartupAnnouncementsWithoutACurrentKeyDoNotFailTheStartAsync`
and `ReceiveLoopSurvivesADiscoveryResponseThatCannotBeSecuredAsync`:
both failed before the fail-soft change.
-
`UadpDiscoveryTests.SecuredDiscoveryMessagesSplitWhereTheReceiverExpects`:
for requests and responses, with and without a DataSetClassId, the
secured encoding differs from the unsecured one only by the
SecurityHeader flag, and its boundary equals the receiver's prefix
length.
-
`UadpDiscoveryTests.EncodeWithSecurityBoundaryRejectsAMessageItCannotSecure`.

### Validation

| Command | Result |
| --- | --- |
| `dotnet test tests/Opc.Ua.PubSub.Tests -f net10.0
-p:CustomTestTarget=net10.0` | 1498 passed, 1 skipped (the UDP multicast
loopback discovery test, which this host skips) |
| `dotnet test tests/Opc.Ua.PubSub.Tests -f net48
-p:CustomTestTarget=net48` | 1498 passed, 1 skipped |
| `dotnet test` on net10.0 for `Opc.Ua.PubSub.Udp.Tests`, `.Eth.Tests`,
`.Mqtt.Tests`, `.Server.Tests`, `fuzzing/Opc.Ua.PubSub.Fuzz.Tests` |
234, 55, 157, 177, 149 passed |
| `dotnet test` on net10.0 for `Opc.Ua.PubSub.Kafka.Tests`,
`.Adapter.Tests`, `.Diagnostics.Tests`, `Opc.Ua.Redundancy.PubSub.Tests`
(on 9417ccbbb) | 92 (1 skipped), 152, 53 (1 skipped), 45 passed |
| `tests\Opc.Ua.Aot.Tests\bin\Debug\net10.0\Opc.Ua.Aot.Tests.exe
--treenode-filter "/*/*/PubSubAotTests/*"` (JIT; the AOT job failed on
94d43919a) | 7 of 7 passed, including `StartsAndStopsPublisher_UdpUadp`
|
| `dotnet build src/Opc.Ua.PubSub -c Release` (all target frameworks) |
0 warnings |
| The docs/PubSub.md first exchange, run verbatim, with #4710 applied
(before the review changes) | The announcement is secured on the wire
(ExtendedFlags1 `0x91`, 268 bytes); 14 DataSets; no unsecured-frame
warning; the subscriber logs `Registered inbound metadata for writer 1`
|
| After merging master (#4710, #4711, #4716), on 83567cecf: `dotnet
build src/Opc.Ua.PubSub -c Release` | 0 warnings |
| Same merge: `dotnet test tests/Opc.Ua.PubSub.Tests -f net10.0`; the
changed fixtures on net48; `dotnet test tests/Opc.Ua.PubSub.Udp.Tests -f
net10.0` | 1498 passed, 1 skipped; 132 passed, 1 skipped; 237 passed |
| Same merge: `Opc.Ua.Aot.Tests.exe --treenode-filter
"/*/*/PubSubAotTests/*"` (JIT) | 8 of 8 passed, including #4710's
`SamplePublisherDeliversSecuredDataSetToSampleSubscriberAsync` |
| Same merge: the docs/PubSub.md first exchange, run verbatim on
`opc.udp://127.0.0.1:4840`, then the publisher alone against a UDP
listener | 9 DataSets in 10 seconds and no warning on either side; the
listener saw 9 DataSetMessages and 1 DiscoveryResponse (the startup
announcement), all with the SecurityHeader bit set |

## Related Issues

- No tracking issue. Found while verifying the PubSub first-exchange
documentation (follow-up to #4555).

## 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>
2026-10-09 16:52:45 +02:00
Marc Schier aeeef5b420 Send UDP multicast on the network interface the transport joins (#4711)
# Description

`UdpDatagramTransport` joined multicast groups on the resolved network
interface: the connection address's `NetworkInterface`, the
`PreferredNetworkInterface` option, or the first operational interface.
It never set `IP_MULTICAST_IF` / `IPV6_MULTICAST_IF`, though, so
multicast data and discovery announcements left through the operating
system's default multicast route. On a computer with several network
interfaces, a publisher configured for one network sent on another, and
subscribers on the configured network missed the messages (OPC 10000-14
§7.3.2.2, `NetworkAddressDataType.NetworkInterface`).

`ConfigureSocket` now sets the multicast send interface to the resolved
interface for IPv4 and IPv6 sockets. That includes the separate socket
that sends discovery announcements for loopback-bound connections. A
failure is logged at Debug level, like the other socket options.

**Behavior change:** without a configured interface, multicast now
leaves through the first operational non-loopback interface, which is
the interface subscribers join on, instead of the default multicast
route. `docs/PubSub.md` and the XML docs of `PreferredNetworkInterface`
and `UdpNetworkInterfaceResolver` describe this and recommend naming the
interface on multi-homed computers.

Tests (`UdpDatagramTransportMulticastInterfaceTests`):

- The IPv4 and IPv6 egress options equal the resolved interface. Before
the fix they were `0.0.0.0` and `0`.
- A publisher and subscriber pinned to the loopback interface exchange a
payload. A raw control sender tells a host without loopback multicast
apart from a publisher that sends elsewhere. The test fails with the bug
on Linux; Windows also delivers local copies sent on other interfaces,
so there it only confirms the exchange.

### Validation

| Command | Result |
| --- | --- |
| `dotnet test tests/Opc.Ua.PubSub.Udp.Tests -f net10.0
-p:CustomTestTarget=net10.0 --filter
"FullyQualifiedName~UdpDatagramTransportMulticastInterfaceTests"`, with
the fix temporarily disabled | IPv4 and IPv6 option tests failed
(`Expected: <192.168.178.101> But was: <0.0.0.0>`, `Expected: 4 But was:
0`) |
| The same tests from the Windows-built binaries in a Linux container
(`mcr.microsoft.com/dotnet/sdk:10.0`, `dotnet test
Opc.Ua.PubSub.Udp.Tests.dll`), fix disabled, 5 runs | 3 of 3 failed in
every run, including the loopback exchange (the control sender arrived,
the publisher's multicast did not) |
| Same, with the fix, 5 runs | 3 of 3 passed in every run |
| `dotnet test tests/Opc.Ua.PubSub.Udp.Tests -f net10.0
-p:CustomTestTarget=net10.0` | 237 passed (Windows, and the same
binaries in the Linux container) |
| `dotnet test tests/Opc.Ua.PubSub.Udp.Tests -f net48
-p:CustomTestTarget=net48` | 232 passed |
| `dotnet test tests/Opc.Ua.PubSub.Tests -f net10.0
-p:CustomTestTarget=net10.0` | 1490 passed, 1 skipped |
| `dotnet build src/Opc.Ua.PubSub.Udp -c Release` (net10.0, net9.0,
net8.0, net48) | 0 warnings |
| The docs/PubSub.md first exchange (unicast loopback), run verbatim,
with #4710 applied | 11 DataSets; the unsecured-frame warning appears
once, as documented |

## Related Issues

- No tracking issue. Found while verifying the PubSub first-exchange
documentation (follow-up to #4555).

## 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.
- [ ] I have addressed **all** PR feedback received.

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-10-09 15:17:51 +02:00
Marc Schier 9600f0de9c Let servers start in globalization-invariant mode (#4716)
# Description

A server did not start in globalization-invariant mode
(`InvariantGlobalization`, or
`DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1`), which Native AOT and
container images often enable. When the server loaded its default status
texts, `ResourceManager` created `CultureInfo("en-US")`. In this mode
the runtime throws `CultureNotFoundException` for every culture except
the invariant one, so the server crashed in
`ResourceManager.LoadDefaultText`.

`ResourceManager` now:

- keeps the locale id of each translation table as a string, and falls
back to its language subtag to find another region of the same language;
- when the runtime cannot create the culture, parses a locale id that
matches the grammar of RFC 5646 §2.1 into the recommended casing of its
subtags. It still rejects a language without a region, and rejects a tag
that does not match the grammar, as before;
- caches the resolved locale ids, so loading the default texts creates
each culture once.

`docs/NativeAoT.md` no longer warns against invariant mode for servers.

The new tests (`ResourceManagerInvariantGlobalizationTests`) reproduce
both invariant-mode behaviors of the runtime: no cultures at all, and
cultures that carry invariant data. They also cover malformed tags, and
well-formed tags with extended language, variant, extension, and private
use subtags.

The branch includes a merge of master: #4707 moved translation lookups
to a lock-free snapshot of the tables, and the snapshot now copies the
locale-id-based tables.

### Validation

| Command | Result |
| --- | --- |
| `dotnet test tests/Opc.Ua.Server.Tests -f net10.0
-p:CustomTestTarget=net10.0 --filter
"FullyQualifiedName~ResourceManager"` | 100 passed, including the 39
tests of the new fixture. Before the fix, 10 of its first 22 tests
failed; 7 of the 17 grammar cases failed against the first version of
the parser |
| `dotnet test tests/Opc.Ua.Server.Tests -f net48
-p:CustomTestTarget=net48 --filter "FullyQualifiedName~ResourceManager"`
| 100 passed |
| `dotnet test tests/Opc.Ua.Server.Tests -f net10.0
-p:CustomTestTarget=net10.0`, on 80e516309 (before the master merge) |
8408 passed, 0 failed, 5 skipped. The run exits 1 because of a
pre-existing certificate leak in `PushComplianceRegressionTests`, which
is unrelated to this change and fixed in #4719 |
| `dotnet build src/Opc.Ua.Server -c Release` (net10.0, net9.0, net8.0,
net48) | 0 warnings |
| MinimalBoilerServer started with
`DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1`, then MinimalClient (on
27c8478a9) | Before the fix: the server crashed with
`CultureNotFoundException`. After: it starts, and the client browses,
reads, and receives a subscription notification |

## Related Issues

- No tracking issue. Found while verifying the Native AOT documentation
(follow-up to #4555).

## 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>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: marcschier <11168470+marcschier@users.noreply.github.com>
2026-10-09 15:17:12 +02:00
Marc Schier 0af7ae3a23 Update the guides and the MCP server docs for the 2.0.0 release (#4713)
# Description

The packages on nuget.org are stable 2.0.0 now. The guides still told
readers to use `--prerelease` and preview-only versions, and kept
caveats that applied only to 2.0.0-preview.5 and earlier previews.

Getting started, Your first information model, and Source-generated data
types:

- Add the packages without `--prerelease` and name 2.0.0 as the verified
version.
- With 2.0.0, a client with no server reports `BadNotConnected`, so the
troubleshooting row drops the preview.5 `SocketException`.
- 2.0.0 generates code for methods that declare their arguments inline,
so the tutorial drops the preview.5 workaround note and its
troubleshooting row, and says both forms are possible.

MCP server (`docs/McpServer.md` and the tool's NuGet README
`tools/Opc.Ua.Mcp/McpREADME.md`):

- Install and run commands use the stable tool: `dotnet tool exec
OPCFoundation.NetStandard.Opc.Ua.Mcp`, `dnx …`, and `dotnet tool install
--global …`, without `--prerelease` or `2.0.0-preview.*`.
- The stable tool bundles `Opc.Ua.Mcp.Robotics` and `Opc.Ua.Mcp.Vision`,
so the note that `vision` and `vision,robotics` need the current source
is removed. The docs now state that only the standalone `Mcp.Robotics`
and `Mcp.Vision` libraries are preview packages (`2.0.0-preview.200`).
- Not changed: `tools/Opc.Ua.Mcp/.mcp/server.json` still declares
`"version": "1.0.0"` and lists only the original profiles in its
description.

### Validation

| Command | Result |
| --- | --- |
| Getting started Route B, the first-model tutorial, and every
troubleshooting row, run exactly as documented against the 2.0.0
packages | Output matches the guides; 0 warnings |
| Native AOT publish of the Route B server and client | 0 warnings; the
native executables completed the trust flow and connected |
| `dotnet tool exec OPCFoundation.NetStandard.Opc.Ua.Mcp -- --version`,
`dnx OPCFoundation.NetStandard.Opc.Ua.Mcp -- --version`, `dotnet tool
exec "OPCFoundation.NetStandard.Opc.Ua.Mcp@2.0.*" -- --version` |
`2.0.0+bc5da1006…` for each |
| `dotnet tool install` of `OPCFoundation.NetStandard.Opc.Ua.Mcp`
without `--prerelease` (into a temporary tool path) | Installs 2.0.0 |
| `dotnet tool exec` of an uncached version with stdin redirected, as an
MCP client launches it | Runs without a confirmation prompt |
| MCP stdio `initialize` + `tools/list` against the 2.0.0 tool with
`--profile vision,robotics`, `vision`, `robotics`, `full` | 64, 26, 42,
and 138 tools |
| Markdown link, anchor, contents, and fence checks over `docs/` | 0
issues |

## Related Issues

- No tracking issue. Follow-up to #4555 after the 2.0.0 release.

## 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.

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-10-09 14:36:18 +02:00
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 7fe7794a19 Enable AES-GCM and ChaCha20-Poly1305 policies on net48 via BouncyCastle (stacked on #4703) (#4705)
> Follow-up to #4703 (now merged to master; this PR has been retargeted
to `master`).

Part of #4510. #4703 enabled the CBC ECC policies on net48 through a
BouncyCastle raw-ECDH polyfill. The AEAD policies were still unavailable
there because .NET Framework has no `AesGcm` or `ChaCha20Poly1305`. This
PR adds those ciphers the same way, so on net48 all of these are now
offered:
`ECC_{nistP256,nistP384,brainpoolP256r1,brainpoolP384r1}_AesGcm` /
`_ChaChaPoly`, `RSA_DH_AesGcm`, `RSA_DH_ChaChaPoly`.

## Changes
- **Polyfill**
`src/Opc.Ua.Security.Certificates/Org.BouncyCastle/AeadCiphers.cs`
(internal, `#if NETFRAMEWORK`, next to `EcdhRawAgreement`): `AesGcm` and
`ChaCha20Poly1305` types with the .NET 8 BCL surface. They wrap
BouncyCastle's `GcmBlockCipher(AesEngine)` and
`Org.BouncyCastle.Crypto.Modes.ChaCha20Poly1305`.
- A tag mismatch throws `CryptographicException`, never BC's
`InvalidCipherTextException`, so
`PlatformSymmetricCryptoProvider.DecryptAuthenticated` still returns
`false` and the channel still raises a protocol error.
- GCM releases plaintext blocks before it checks the tag, so plaintext
stays in a scratch buffer and is copied out only after the tag verifies.
On failure the destination is cleared, as the BCL does. Scratch buffers
and the key copy are zeroed.
- **Opc.Ua.Core**: aliases the polyfill types on `NETFRAMEWORK` and
removes the `NET8_0_OR_GREATER` gates in `SecurityPolicies`
(`SupportsAesGcmPolicy` / `SupportsChaCha20Poly1305Policy`),
`CryptoUtils` (`SymmetricEncryptAndSign` / `SymmetricDecryptAndVerify`,
AEAD helpers) and `PlatformSymmetricCryptoProvider`. The channel, the
provider facet and the encrypted ECC user tokens (`EncryptedSecret`,
through `CryptoUtils`) now run the same code on every target. .NET 8+
keeps the BCL ciphers.
- **FIPS** (requested by the #4703 session, after a2ecf13b1): under
`CryptoCompliancePolicy.FipsOnly`, `CryptoCompliance.IsPolicyPermitted`
now also withholds every AEAD policy on .NET Framework. That adds
`RSA_DH_AesGcm`, which is FIPS-approved and not ECC. The BouncyCastle
cipher runs outside any validated module and the user-token path
bypasses the provider registry, so the auditor cannot see it. Tests and
`docs/CryptoProvider.md` are updated to match.
- **Docs**: EccProfiles (Known Limitations), migration `certificates.md`
(and the bundled skill copy), ProductionChecklist, Profiles,
WhatsNewIn2.0, CryptoProvider. They state that on net48 these primitives
run in managed BouncyCastle, which is not a validated (FIPS) module and
not hardware-accelerated or hardened against cache-timing attacks like
CNG AES.

## Tests
- New `AeadPolyfillTests` (Core.Tests):
- Known answers: NIST GCM test cases 2/4 (AES-128) and 14/16 (AES-256),
plus RFC 8439 §2.8.2 for ChaCha20-Poly1305. They run through
`PlatformSymmetricCryptoProvider` on every TFM and through the polyfill
directly.
- Tampering with the tag, the ciphertext or the AAD gives `false` from
the provider, and `CryptographicException` with a cleared plaintext from
the polyfill.
  - Argument validation.
- **BCL cross-check:** on .NET 8+, Core.Tests also compiles
`AeadCiphers.cs` (`AEAD_POLYFILL_CROSSCHECK`, test-only
`BouncyCastle.Cryptography` reference). Polyfill and BCL must produce
identical ciphertext and tag, and each must decrypt the other's output:
3 algorithms × 8 message lengths (0 to 8192) × 3 AAD lengths.
- `CryptoProviderRegistryTests`: `RSA_DH_AesGcm` is permitted under
FipsOnly only off .NET Framework and withheld on it.
- Tests that `Assert.Ignore` when AEAD is unavailable now run on net48,
e.g. `EccSecretRejectsDifferentNegotiatedPolicyAsync` and the
`RSA_DH_AesGcm` server session tests.

### Local results
| Run | Result |
|---|---|
| Core.Tests net48, full (before the FIPS commit) | 6049 passed, 0
failed, 88 skipped |
| Core.Tests crypto/AEAD/ECC/EncryptedSecret/Nonce subset, net48 /
net10.0 | 278 / 343 passed, 0 skipped |
| Server.Tests session-security/ECC subset, net48 | 128 passed, 0
skipped |
| `EccInteropTests` net48 vs **open62541 1.5.8 (OpenSSL)** peer | all 16
AEAD cases pass, 4 of them two-renewal token-renewal runs
(`ECC_nistP256_AesGcm`/`_ChaChaPoly` × Sign/SignAndEncrypt ×
Anonymous/UserName, both directions). Remaining 8 failures are the
documented open62541 CBC Sign-only HKDF differences in
`expected-differences.json` |
| `EccInteropTests` net48 vs 1.5.378 LegacyPeer | unchanged 26 passed /
28 skipped |

Note on the acceptance criterion: the 1.5.378 LegacyPeer does not
implement the AEAD policies, so its
`_AesGcm`/`_ChaChaPoly`/`*AeadTokenRenewalAsync` cases skip on every TFM
("The peer (UA-.NETStandard) does not declare …"). Before this PR they
skipped on the 2.0 side; now they get past it and stop at the peer
check. The open62541 peer is the real cross-stack check of the net48
AEAD path against a non-BouncyCastle implementation.

## PubSub DTLS on net48
The DTLS 1.3 transport (`src/Opc.Ua.PubSub.Udp/Dtls`) was compiled out
on .NET Framework, so net48 registered no DTLS profiles. It now reuses
the same polyfills (`Opc.Ua.Security.Certificates` gains
`InternalsVisibleTo Opc.Ua.PubSub.Udp`):
- The `NET8_0_OR_GREATER` gates in the handshake, ECDHE, record
protection and profile probe are removed.
- Two .NET 8 APIs get net48 fallbacks: the AES-ECB record-number mask
uses `CreateEncryptor`, and the handshake random uses
`RandomNumberGenerator.Create`.
- The HKDF probe now checks the managed `DtlsHkdf` that the key schedule
actually uses.
- The public `IsAeadSupported` / `IsRawSharedSecretSupported` probes are
kept and now return `true` everywhere.
- The DTLS tests now also run on net48. The net48 "registers no
profiles" test now asserts that the NIST AEAD profiles are registered.
The socket transport-peer tests and the benchmarks stay .NET 8-only
because they use .NET 8 socket APIs.
- `docs/PubSub.md` DTLS profile table: the net48 column is updated.

Results: PubSub.Udp.Tests net48, full suite: **229 passed, 0 skipped**.
It includes complete NIST AEAD, brainpool and integrity-only handshakes
and ChaCha20 records. The DTLS subset is 76 on net48 vs 81 on net10.0;
the 5 still-gated socket-peer tests are the difference.

Note: DTLS profile selection does not consult `CryptoCompliancePolicy`
on any target. That is pre-existing and unchanged here.

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---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-09 06:30:14 +02:00
romanett 2ba58a8cbf WoT: move GeneratesEvent off Object instances (OPC 10000-3 §7.15) (#4706)
Fixes #4669.

OPC 10000-3 §7.15 says the SourceNode of `GeneratesEvent` "shall be an
ObjectType, a VariableType or a Method". CTT `Base Info Core Structure 2
001.js` flags every Object that is the source of one. #4667 fixed this
in the source generator. This PR fixes the three remaining WoT places.

### 1. WotCon asset registry
- `AssetRegistry.BuildEventNode` / `RemoveEventTypes` no longer add or
remove `GeneratesEvent` from the asset Object. Event delivery already
relies on `EventNotifier = SubscribeToEvents` and root-notifier
registration.
- Tests now assert the reference is **absent** and the notifier bit is
set. The re-apply test asserts that the old EventType node is gone.

### 2. WoT NodeSet converter (`src/Opc.Ua.Types/Wot`)
- **TD → NodeSet:** a last pass (`RelocateInstanceGeneratesEvent`) moves
forward `GeneratesEvent` references off an Object/Variable root:
- An event the bound type already declares needs nothing more. Matching
is by qualified BrowseName against the local context's declarations, the
same rule as the declaration merge.
- Any other event is declared by a synthesized non-abstract
`<rootLocal>Type`. It derives from the bound type (or from
`BaseObjectType` / `BaseDataVariableType` when the TD binds none) and
becomes the instance's `HasTypeDefinition`. A Variable root gets a
`UAVariableType` with the instance's DataType and ValueRank.
- Thing Models are unchanged: the projected type keeps its
`GeneratesEvent`.
- **NodeSet → TD:**
- An instance's event affordances are now collected from its type
definition and that type's supertypes. Instance-level `GeneratesEvent`
is still read for third-party NodeSets.
- In a single readable document, a type that only carries one instance's
events (only `HasSubtype` + `GeneratesEvent`, typing exactly one
instance) is not chosen as root. It is folded back: its supertype
becomes the type binding, and no link is written when that supertype is
the default base type. The TD → NodeSet → TD round trip stays readable,
with no `uav:nodes` fallback.
- A document set gives the carrier its own Thing Model, and the instance
TD binds to it.
- **Archive check:** an event affordance is accepted when the root's
type definition, or one of its supertypes, generates it.
- `docs/WoTNodeSetConversion.md` documents the behaviour in a new "Event
source" row.

### 3. Aggregation sample
- `SamplePump.NodeSet2.xml`: each pump is typed by its own `PumpType`
subtype, `ns=1;s=Pump1.Type` (`Pump_1Type`) and `Pump2.Type`, which
declares its alarm EventTypes.
- It is per pump because each pump owns its alarm EventTypes.
`Pump2.Type` is cloned with the rest of Pump2.
- The pumps keep `EventNotifier="1"` and no longer carry
`GeneratesEvent`.
- The checked-in documents are regenerated, adding
`sample-pump-pump-1type.json` / `-2type.json`. The pump TDs still list
the alarm event affordances.
- The sample binding lookup ignores Thing Models, because the type's TM
declares the same EventType as the pump TD. A declaration missing from
the instance still fails as before.
- Docs: `WoTConnectivity.md` (asset event affordances, §12.4.2) and
`WotBindings.md`. The `GeneratesEvent` clause in the sample-limitation
note was already stale, so I removed it.

### Runtime check
`WotNativeOwnershipIndex` only uses `GeneratesEvent` in its alias table.
Projected event routing takes the owner from `uav:componentOf` /
`uav:id` and the notifier from Parent/`HasNotifier`. Nothing in
`Opc.Ua.WotCon.Server` reads an instance-level `GeneratesEvent`.

### Tests (net10.0)
- `Opc.Ua.Types.Tests`: 11446 passed, 1 skipped. New
`WotInstanceEventSourceTests` covers object and variable roots, TMs, the
TD with no events, the folded round trip, the legacy instance reference
and the document set. Two bound-type cases were added to
`WotDeclarationMergeBoundaryTests`.
- `Opc.Ua.WotCon.Bindings.Tests`: 714 passed.
- `Opc.Ua.WotCon.Tests`: 1496 passed, including the byte-exact sample
regeneration tests.
- net48 build of both test projects is clean, and `dotnet format
whitespace` is clean.

Not run: CTT `Base Info Core Structure 2 001.js` (p02-base-info) against
a WotCon server.

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---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Marc Schier <marcschier@users.noreply.github.com>
2026-10-08 20:57:20 +00:00
romanett 1da9fc0543 Redundancy.Server session mirroring: fix fast reconnect lifecycle (#4627) (#4704)
Fixes #4627 — the eight Redundancy.Server session mirroring defects
(HotAndMirrored fast reconnect).

## Changes

| ID | Fix |
|----|-----|
| RS-1 | The owning replica mirrors a liveness heartbeat
(`LastContactAt`), written at most once per quarter of the session
timeout while the client uses the session
(`DistributedSessionOptions.LivenessInterval`, default 1 s). A restore
expires the timeout after the later of the last activation and the last
mirrored contact, plus the heartbeat's maximum lag. |
| RS-2 | Entries record their owning replica (`OwnerId`). Only the owner
mirrors and deletes the entry. A restore takes ownership with a
conditional write. A stale copy on the previous replica is dropped
without deleting the entry, both when its heartbeat sees the change and
when the client fails back to it. `ISharedSessionStore` gains
`TryReplaceAsync`, `TryRemoveAsync` and `EnumerateAsync`. Over a store
without CAS (the CRDT gossip store) they fall back to
compare-then-write. |
| RS-3 | A restored session keeps the SessionId from `CreateSession`:
`Session.RequestedId`, and `DiagnosticsNodeManager` honours a requested
id when it is free. `DistributedSessionManager` mints GUID SessionIds
that are unique across the replica set. Continuation points therefore
stay under one owner id across repeated failovers. |
| RS-4 | Sessions whose user token is encrypted with an ECC/RSA-DH
EphemeralKey are flagged. Their restore is rejected up front
(`EphemeralKeyUnavailable`), before anything is consumed or counted as a
failed authentication. The documented option from the issue was chosen
over mirroring ephemeral private keys. |
| RS-5 | New `SessionManager.AdmitRestoredSessionAsync` hook: the
mirrored nonce is consumed only after the restored activation has passed
the signature, identity and continuity checks. If a restored session's
first activation fails, the session is discarded without the virtual
close, so the shared entry is untouched. Restored copies that are not
admitted now also release their diagnostics node, and
`CurrentSessionCount` is balanced for restored sessions. |
| RS-6 | Expired entries are deleted on restore and by a periodic sweep
(`SweepInterval`, default 5 min). The sweep also purges consumed-nonce
markers that no live entry references and that are older than
`NonceMarkerRetention` (default 1 h), via
`ISingleUseNonceRegistry.PurgeAsync`. |
| RS-7 | `SharedKeyValueSessionStore` and
`DistributedSessionManagerFactory` now throw for an external store
without an `IRecordProtector`, as the DI registration already does. Pass
`NullRecordProtector.Instance` to opt out explicitly. |
| RS-8 | Entries carry the original server certificate. A restored
session accepts a client signature over either that certificate or its
own one (`Session.OriginalServerCertificate`). |

Entries are now written at `SecurityStateVersion` 5. Entries at versions
3 and 4 can still be restored, without an owner.

### API changes (Redundancy.Server)
- New members on `ISharedSessionStore` and `ISingleUseNonceRegistry`.
- An optional `TimeProvider` parameter on
`SharedSingleUseNonceRegistry`.
- New `DistributedSessionOptions` properties.
- `SharedSessionEntry` v5 fields.
- `SharedKeyValueSessionStore` and `DistributedSessionManagerFactory`
throw for external stores without a protector.

## Tests
- New unit tests for every finding: the
restore/heartbeat/ownership/sweep/SessionId paths of
`DistributedSessionManager`; store conditional writes, the CAS fallback
and v5 round-trips; the registry purge; the factory/store guard; base
`SessionRestoreTests` (admitted once, discarded on validation failure or
rejected admission); and `SessionOriginalServerCertificateTests`.
- New end-to-end test
`SessionUsedPastItsTimeoutFailsOverWithItsSessionIdAsync`. The client
uses the session for 2× its timeout, then fails over. The test checks
that the SessionId is preserved and that the standby serves that
SessionId and owns the entry. It also closes the stale copy and checks
the entry survives. With the heartbeat disabled, the test fails as
expected.
- Local net10.0 runs: Redundancy.Server.Tests 883/883, Server.Tests 8347
passed / 5 skipped, Sessions.Tests 849 passed / 379 skipped (the usual
baseline). The net48 build is clean. The Redundancy session tests pass
on net48; the ECC-only cases are skipped there.

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---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-08 21:54:14 +02:00
romanett d552634258 Enable ECC security policies on net48 via a BouncyCastle raw-ECDH polyfill (#4703)
Closes #4510.

## Summary

OPC UA Part 6 feeds the **raw** ECDH shared secret into HKDF. .NET
Framework only exposes `ECDiffieHellman.DeriveKeyMaterial`, which always
hashes it, so the ECC SecureChannel and user-token policies were
unavailable on `net48` (`SecurityPolicies.GetInfo` returned `null`).

This adds a BouncyCastle polyfill for just that primitive:

-
**`Opc.Ua.Security.Certificates/Org.BouncyCastle/EcdhRawAgreement.cs`**
(`net48` only): an internal `DeriveRawSecretAgreement(this
ECDiffieHellman, ECDiffieHellmanPublicKey)` extension using
`ECDHBasicAgreement`. It returns the X coordinate padded to the field
size, exactly like the .NET 8 BCL method. Keys stay CNG keys; ECDSA
signatures and HKDF stay on the platform — only the agreement step is
managed code. The point is validated (on curve, not infinity) and
mismatched curves are rejected.
- Because the extension mirrors the .NET 8 signature,
`Nonce.GenerateSecret` now has one code path on every target.
- `SupportsRawEccSecretAgreement()` is removed; the CBC-based ECC
policies (`ECC_nistP256`, `ECC_nistP384`, `ECC_brainpoolP256r1`,
`ECC_brainpoolP384r1`) are offered on every target (still subject to OS
curve support).
- BouncyCastle was already a `net48` dependency of
`Opc.Ua.Security.Certificates`; no new package. (Only `net48` is
downlevel now — `netstandard2.1`/`net472` from the issue text are no
longer targets.)

**Not in scope:** the `_AesGcm` / `_ChaChaPoly` ECC variants (and PubSub
DTLS) still need .NET 8 because .NET Framework has no AEAD ciphers —
follow-up stacked on this branch.

## Docs

`EccProfiles.md` (Known limitations), `migrate/2.0.x/certificates.md`,
`ProductionChecklist.md`, `Profiles.md`, `WhatsNewIn2.0.md`. Calls out
that on `net48` the agreement step does not run in a FIPS/validated
module.

## Tests (local)

| Suite | Result |
|---|---|
| `Opc.Ua.Core.Tests` full, net48 | 5956 passed, 0 failed |
| `EccInteropTests` net48 vs 1.5.378 peer (net8.0, native raw ECDH) | 26
passed; 28 skipped (AEAD + curve25519/448) — all four CBC curves, both
directions, UserName tokens, token renewal |
| `Opc.Ua.Sessions.Tests` ECC filter, net48 | 52 passed, 0 failed |
| Server `SessionCoverageTests`/`EphemeralNonce*`, Configuration builder
tests, net48 | all pass |
| Nonce/ECC/EncryptedSecret + session tests, net10.0 | all pass |

New tests: symmetric agreement on all four curves; on net48 an oracle
against CNG (`SHA256(raw) == DeriveKeyFromHash`); curve mismatch and
off-curve rejection. Tests that asserted the old net48 limitation were
updated.

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---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-08 21:52:44 +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.

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---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-08 08:48:13 +02:00
romanett b8f07843b2 Secure channel: never answer with an expired token; accept a just-expired one (+ labelled soak/stress CI) (#4698)
## Summary

**Secure channel: a client could drop the channel when the server
answered with a just-expired token.** Running the long-dormant
ConnectionStability soak locally, the subscription channel shut down
with `BadSecureChannelClosed`. The session then timed out and the
subscription was abandoned. Root cause, against OPC 10000-4 §5.6.2.1:

1. **Server (rule 2: use the old token only "until the SecurityToken
expires").** After a renew, the server keeps securing messages with the
old token until the client sends something secured with the new one.
That activation only happened on *receive*. A client that sends nothing,
for example one whose Publish requests are all outstanding, kept getting
responses secured with the old token after it expired.
2. **Client (rule 3: "accept Messages secured by an expired
SecurityToken for up to 25 % of the token lifetime").** The client
rejected any such response the moment the token expired, throwing
`BadTcpSecureChannelUnknown`, and shut the channel down.

From the failing run (token lifetime 10 s): the client renewed to token
#11 at 09:59:01.686 and sent nothing on that channel afterwards. The
server, still on #10, sent a Publish response at 09:59:04.389, 380 ms
after #10 expired. The client rejected it and closed the channel.
Nothing reconnected, the 10 s session timeout expired, and the server
abandoned the subscription.

Both halves date back to the 2016 initial commit; this is not a recent
regression. It hits whenever the client sends nothing on the channel
between renewing and the old token's expiry, so it is timing-dependent.

### Fix
- `UaSCBinaryChannel.ActivateRenewedTokenIfDue()` activates a pending
renewed token once the current one passes `TokenActivationPeriod` (95
%). This is the rule the receive path already applied. It is now shared,
and `TcpServerChannel.SendResponse` calls it before securing a response.
- `ReadSymmetricMessage` accepts responses (not requests) secured with
an expired token for `TcpMessageLimits.TokenExpiryGracePeriod` (25 %) of
its lifetime.

### Tests
`TcpReconnectKeyAgreementTests` now runs the server channel and the peer
on one shared `FakeTimeProvider`:
- `ResponseSentAfterTheCurrentTokenExpiresUsesTheRenewedTokenAsync`: a
response sent at 96 % of the old token's lifetime is secured with the
renewed token.
-
`ResponseSecuredWithTheExpiredTokenIsAcceptedWithinTheGracePeriodAsync`:
accepted at 120 % of the lifetime, rejected at 130 %.

Both fail without the fix. All 40 tests in the fixture pass with it.

## CI: soak and stress runs on labelled PRs (and the soak that tested
nothing)

The bug stayed hidden because `stability-test.yml` still filtered
`Opc.Ua.Client.Tests` after #3810 moved the test to
`Opc.Ua.Sessions.Tests` (2026-05-28). Since then the nightly has run
**zero tests** while reporting green: runs dropped from ~100 min to ~15
min.

- `stability-test.yml` now targets `Opc.Ua.Sessions.Tests` and writes a
TRX file.
- New `.github/scripts/assert-tests-ran.ps1`, used by all three opt-in
workflows, fails a run in which no test executed, or none passed.
Contract-tested in `CiAssertTestsRanTests`.
- Like `interop`, the opt-in workflows can now run on a labelled PR.
They are not required checks. A later push cancels the run in progress,
and adding an unrelated label neither starts nor cancels a run.

| Label | Workflows | Run on a PR |
| --- | --- | --- |
| `stress` | Stress Tests (ChaosTCP) | Random seed, saved as
`chaos-seed.txt` in the results artifact |
| `soak` | Connection Stability Test, Sample HA Long-Haul Test | 30 min
stability; 15 min per HA scenario |

## Test plan

- [x] `TcpReconnectKeyAgreementTests`: 40/40 pass; the 2 new tests fail
without the fix
- [x] All `Opc.Ua.Core.Tests.Stack` tests (net10.0): 3548 passed, 0
failed
- [x] `CiAssertTestsRanTests`: 4/4
- [x] `soak` + `stress` labelled run on this PR (before the fix): both
stability tests, both HA long-haul scenarios and ChaosTCP passed on
Linux (the label triggers and push-cancellation work)
- [x] Local short-haul soak with the fix (Windows, 10 s tokens), 2 runs:
both pass with full notification counts; run 2 hit the window once
(`Token activated forced` on send) and kept the channel
- [x] `soak` + `stress` labelled run with the fix: Connection Stability
(2 tests), Sample HA Long-Haul and ChaosTCP all pass

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---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-07 19:14:25 +02:00
Klaus Landsdorf fa55157ce4 Server: hold anonymous session-less requests to the channel security of CreateSession (#4689)
# Description

`AddSessionlessInvocation(o => o.AllowAnonymous = true)` (#4659) lets a
request without an Access Token run as an anonymous user. OPC 10000-4
§6.3.1 allows that only "if application authentication through the
SecureChannel is sufficient". On HTTPS the channel gave no such
authentication: on an endpoint with mutual TLS and a SignAndEncrypt
policy, a session-less request without a TLS client certificate and
without an Access Token was answered `Good`, over the REST binding and
over the binary POST with `OPCUA-SecurityPolicy: Basic256Sha256`.
`CreateSession` on the same endpoint answers `Bad_SecurityChecksFailed`
without the certificate, and ActivateSession on a new channel does too
(OPC 10000-6 §7.4.1: applications that use HTTPS and require application
authentication check the application certificates during the
CreateSession/ActivateSession handshake).

This PR makes a session-less request without an Access Token meet what
the endpoint demands of a Session. #4659 is merged, in no release tag
and opt-in, so this is a change to a new feature; the default
`AllowAnonymous = false` is not affected.

## Changes

### `SessionManager.ValidateSessionlessRequestAsync`
(`src/Opc.Ua.Server/Session/SessionManager.cs`)

With `AllowAnonymous`, a request without an Access Token now needs:

| Check | Where it applies | Status otherwise | Same as |
| --- | --- | --- | --- |
| The client certificate of the channel
(`SecureChannelContext.ClientChannelCertificate`) | endpoints with a
security mode or policy other than None, and HTTPS endpoints when
`HttpsMutualTls` is set | `Bad_SecurityChecksFailed` | CreateSession on
the HTTPS listener; ActivateSession on a new channel |
| An Anonymous user token policy on the endpoint (an endpoint without
policies does not restrict) | every endpoint |
`Bad_IdentityTokenRejected` | ActivateSession with an anonymous identity
token |
| An endpoint on the channel | every request |
`Bad_SecurityModeInsufficient` | the same request with an Access Token |

- The certificate is the one the transport has validated: the
SecureChannel certificate of opc.tcp and opc.wss, the TLS client
certificate of the HTTPS listener (REST, binary, JSON). So opc.tcp
channels with security keep working as they did, and an HTTPS client
that wants an anonymous session-less call presents its application
certificate in the TLS handshake.
- An HTTPS listener without `HttpsMutualTls` advertises SecurityMode
None without an Anonymous user token policy (`HttpsServiceHost`); an
anonymous session-less request there is now rejected as an anonymous
Session is.
- A request **with an Access Token** is unchanged: the token
authenticates the caller and HTTPS keeps it confidential (HTTPS clients
are not required to present a certificate, OPC 10000-6 §7.4.1). A
`ValidateSessionLessRequest` handler still takes over completely.
- Not changed: the transport credential authentication of the REST
routes (#4674).

`SessionlessInvocationOptions.AllowAnonymous` documents the rule.
`docs/SessionlessInvocation.md` has a new section "Anonymous requests
and the channel" with the table.

### Tests

- `tests/Opc.Ua.Sessions.Tests/SessionlessChannelSecurityTests.cs` (new,
net8.0+): a real reference server with an HTTPS listener, twice (mutual
TLS on with a SignAndEncrypt-only endpoint; mutual TLS off), over REST
and the binary POST, with and without a TLS client certificate:
anonymous without a certificate, with a certificate, `AllowAnonymous =
false`, a valid and a bogus Access Token, and CreateSession on the
binary POST without the certificate for comparison. 44 cases.
- `tests/Opc.Ua.Server.Tests/SessionlessInvocationTests.cs`: opc.tcp
with and without a channel certificate (Sign, SignAndEncrypt, None),
HTTPS with and without mutual TLS and with a secured endpoint, user
token policies with and without Anonymous, no endpoint, an Access Token
and a handler without a certificate. The existing tests that use
`AllowAnonymous` set `HttpsMutualTls = false` or give the channel an
endpoint.
- Fail without the change: 7 of the 9 new `SessionlessInvocationTests`
cases fail with the `SessionManager.cs` change removed (the opc.tcp with
security, HTTPS with and without mutual TLS, user token policy and
unknown endpoint tests); the 6 failing `SessionlessChannelSecurityTests`
cases are below.

## Testing

- **Reproduction on master (`c03c12838`)**:
`SessionlessChannelSecurityTests` without the change: 6 of 44 cases
fail, 38 pass. With mutual TLS on and no TLS client certificate the
anonymous request is answered `Good` instead of
`Bad_SecurityChecksFailed` (REST and binary). With mutual TLS off it is
answered `Good` instead of `Bad_IdentityTokenRejected` (REST and binary,
with and without a certificate). All 44 pass with the change; the Access
Token cases pass both ways.
- Results on macOS: `Opc.Ua.Server.Tests` full run on net10.0 8197
passed / 9 skipped / 0 failed; the session-less and SessionManager
filters 139 passed / 0 failed on net10.0 and on net8.0.
`Opc.Ua.Sessions.Tests` with the HTTPS/WebApi/Sessionless filters 125
passed / 0 failed on net10.0 and on net8.0, and with the
Wss/OpenApi/ClientTest filters 320 passed / 241 skipped / 0 failed on
net10.0.
- Builds: `Opc.Ua.Server`, `Opc.Ua.Server.Tests` and
`Opc.Ua.Sessions.Tests` for net48, net8.0, net9.0 and net10.0: 0
warnings, 0 errors.
- `dotnet format` (whitespace, style, analyzers `--severity info`, one
`--include` per changed file): no finding on a changed line (CA1849 at
`SessionManager.cs` 235 is on master).
- Coverage (`.azurepipelines/check-coverage.ps1` against master,
session-less and SessionManager tests of `Opc.Ua.Server.Tests` on
net10.0): patch 36/36 changed lines (100 %). The project floor is not
meaningful for this subset.
- CI and CodeQL on the PR branch: [CI run
37529750287](https://github.com/biancode/UA-.NETStandard/actions/runs/37529750287)
green (158/158 jobs, incl. macOS and Windows net48), [CodeQL run
37529754883](https://github.com/biancode/UA-.NETStandard/actions/runs/37529754883)
green, on `03a8e3d91`.

## Related Issues

- Fixes #4688
- Relates to #4659 (session-less invocation), #4657 (the REST binding's
session-less service set) and #4674 (REST authentication)

## 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. (Affected
suites on net10.0 and net8.0 locally on macOS; .NET Framework is covered
by the branch CI's Windows net48 legs.)
- [ ] 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: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
2026-10-07 08:55:53 +00:00
romanett fbaabf5b28 Cut CI runner minutes: duration-packed test batches, CodeQL on Linux/daily, cancellable branch packing (#4694)
Reduces GitHub Actions runner minutes without removing any OS, target
framework, test project or check. All figures come from master CI run
37520359929 (158 jobs, ~1,880 runner-minutes) and the last two weeks of
run history.

## 1. Test batches packed by duration (`get-ci-matrix.ps1`)

Previously the expander picked the **smallest** batch size that fit the
256-job limit, which meant 2 projects per job and 33 jobs per profile.
Job logs show ~45% of the test matrix (674 of ~1,516 min) went to
compiling. Each batch rebuilds the shared dependency graph: the first
project's build took 3.8–4.9 min, the second only 0.4–0.9 min.

- Projects are now packed in path order (which keeps `PubSub.*`,
`Redundancy.*`, `WotCon.*` together) up to a 30-minute weight target,
using `.github/ci-test-durations.json`. Each weight is the slowest PR
profile's test minutes, rounded up, plus 1.
- A batch never holds more projects than the job timeout can budget for:
at most 7, given 20 + n×45 ≤ 350.
- If the matrix would exceed the job limit, the target is raised
instead.
- **PR test matrix: 132 → 60 jobs** (15 per profile; macOS 33 → 15).
Each batch is estimated at ≤36 min on the slowest runner, comparable to
today's slowest jobs (37–43 min), so wall-clock should be about the
same. Expected saving is roughly 300+ runner-min per run, plus less
queueing for the scarce macOS runners.
- The weekly full scope shrinks the same way (still 13 profiles).
- The table only steers balance: a project missing from it gets
`defaultMinutes`, so it is still scheduled.
- `run-dotnet-tests.ps1` now records per-project
`buildSeconds`/`testSeconds` (batch summary and job summary). The new
`update-test-durations.ps1` refreshes the table from any run's
`dotnet-results-*` artifacts.
- `discover` output `batch_size` is renamed to `batch_target_minutes`.
Nothing consumed it.

New `CiMatrixScriptTests` cases:
- each profile runs each of its projects exactly once;
- only a lone project may exceed the target;
- PR profiles average ≥3 projects per job;
- the duration table names only existing projects.

## 2 + 3. CodeQL (`codeql-analysis.yml`)

- **No longer runs on every push to master.** Instead, a daily schedule
on master (was weekly) gives an analysis that always completes. Each
analysis takes ~3 h, and with `cancel-in-progress: true` per branch, 49
of 76 push runs in two weeks were cancelled by the next merge before
uploading anything. `master378`/`release/*`/`develop/*` keep their push
trigger. PRs are still analyzed as before.
- Only PR runs are cancelled when superseded. Push and scheduled runs
always finish.
- **Runs on `ubuntu-latest` instead of `windows-2025`.** Only net10.0 is
built, so the extracted sources are identical. The traced Windows build
alone took 70 min, against 12 min for the untraced Linux `UA.slnx`
net10.0 leg. This PR touches a `.cs` file, so its own CodeQL run is the
first measurement.

## 4. NuGet packing on feature branches (`nuget-publish.yml`)

298 of ~400 runs in two weeks were feature-branch pushes, each about 59
Windows-min across two signed builds.

- A superseded feature-branch run is now cancelled. Protected lines and
tags are never cancelled: they publish previews, and `release.yml`
promotes a run by ID. Each manual (`workflow_dispatch`) run gets its own
concurrency group, so a later push cannot cancel it.
- A new `changes` job skips packing when a feature branch, as a whole,
changes only documentation. It diffs against the merge base with master,
not the previous push, so a docs-only push that cancels a code push
cannot mask that code change. It uses the same `get-path-relevance.ps1`
rule as CI.
- Protected refs, tags, manual runs, and any branch whose merge base
cannot be resolved always pack. Checked locally for docs-only branch
(skip), code branch, protected ref, manual run and unknown commit (all
pack).

## Verification

- `CiMatrixScriptTests`, `CiPathRelevanceTests` and the new
`CiTestDurationsScriptTests` (covering `update-test-durations.ps1`): all
`*.Ci*` tests in `Opc.Ua.Tools.Tests` pass locally, 63/63.
- This PR's own CI run shows the new matrix. Compare its total
runner-minutes and longest test job against run 37520359929.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-07 10:00:19 +02:00
romanett fa06c66dbb Stop versioning DI and ISA95 packages as preview (#4686)
## Summary
Removes the **DI** (`Opc.Ua.Di*`) and **ISA95** (`Opc.Ua.ISA95*`)
package families from the preview-only set, so they ship with the stable
root version (e.g. `2.0.1` instead of `2.0.1-preview.N`).

- `version.targets`: drop the two `_IsPreviewPackage` conditions.
- `.azurepipelines/package-version-policy.ps1`: drop `ISA95|Di` from
`Test-PreviewPackageId`. It must match `version.targets`, because the
package-set validator fails if the two disagree.
- `PackageVersionPolicyTests`: ISA95/Di IDs are now expected to be
non-preview, they are removed from the classifier-agreement token list,
and the "already-preview base version" case now uses Robotics.
- Docs (`DeveloperGuide.md`, `ReleaseProcess.md`, `docs/README.md`): the
preview-family list no longer includes DI or ISA95, and the "preview
package" label is removed from the DI, Software Update (part of the DI
packages), and ISA-95 entries.

## Test
`dotnet test tests/Opc.Ua.Tools.Tests --filter PackageVersionPolicy`
(net10.0): 87/87 passed.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-06 19:37:20 +00:00
Copilot c03c128384 Treat code analysis (CA) warnings as errors and fix all surfaced analyzer warnings (#4680)
# Description

`TreatWarningsAsErrors` was already enabled, but
`CodeAnalysisTreatWarningsAsErrors` was `false`, so Microsoft Code
Analysis (`CAxxxx`) warnings were non-fatal. This PR sets it to `true`
in `common.props` and fixes all 55 analyzer warnings the net10.0 build
reported.

**Production code**
- `SamplingGroup.cs`: CA2213 is a false positive here because the
detached `CancellationTokenSource` is disposed by `CancelSamplingLoop`
once the loop completes. It is suppressed with a pragma, a justification
and a TODO, following the existing pattern in
`ServerBase.RequestQueue.cs`.

**Tests**
- CA1861: constant array arguments are moved to `static readonly` fields
or replaced with `ArrayOf<T>` collection expressions. In the legacy
interop server I used locals instead, because those arrays become node
values that writes can change in place.
- CA2025: tasks that finish before disposal (`Assert.ThrowsAsync`, or
awaited before `using` scope exit) are suppressed with justification
comments, following existing test patterns.
- CA1812: classes created by the DI container are suppressed with a
comment and a TODO.
- CA2208: benchmark switch defaults now throw
`InvalidOperationException`.
- CA1845: `Substring(0, 8)` is replaced with `[..8]`.
- CA1307: `string.Replace` is replaced with `Split`/`Join`, which also
works on net48.
- CA5394: `Random` is replaced with `RandomNumberGenerator`.

**Docs**
- `docs/DeveloperGuide.md` now says CA warnings also fail the build, and
that any suppression needs a comment explaining why plus a TODO.

**Validation**
- I fixed the 55 warnings from a net10.0 build of `UA.slnx`
(`CustomTestTarget=net10.0`). That build ran before the setting was
turned on, and I have not rebuilt net10.0 since the fixes.
- `CustomTestTarget=net48` build of `UA.slnx`: 0 warnings, 0 errors.
- I also started a full build across all target frameworks with the
setting on. Its log showed no errors or warnings while it ran, but I
couldn't read its final result.
- No tests have been run yet; CI should confirm the multi-TFM build and
the 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.
- [ ] 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: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: romanett <7413710+romanett@users.noreply.github.com>
Co-authored-by: Marc Schier <marcschier@users.noreply.github.com>
2026-10-06 18:54:28 +02:00
romanett 21e04bdba5 Make Bad_CertificateChainIncomplete unsuppressible; add UpdateCertificate renewal regression tests (#4683)
# Description

Follow-up to the master378 fix in #4678 (CTT: application certificate
renewal must use the configured trust stores). Master already ignores
the supplied `issuerCertificates` for the default application group (OPC
10000-12 §7.10.5), but it had no regression tests for CA-signed
renewals. While adding them I found a real gap:

**The validator treated `Bad_CertificateChainIncomplete` as
suppressible.** OPC 10000-4 Table 100 (Build Certificate Chain) says:
"An error during the chain creation may not be suppressed." §6.1.3 adds:
"Processing fails with Bad_SecurityChecksFailed if an element in the
chain cannot be found." UpdateCertificate for the application group
accepts every *suppressible* error (as §7.10.5 requires). As a result it
accepted a renewal signed by a CA that is **not** in the TrustList and
was only passed in the ignored issuer list, which is exactly what
§7.10.5 rules out.

## Changes
- `CertificateValidationCore`: remove `BadCertificateChainIncomplete`
from the suppressible status codes. An accept callback (`AcceptError`)
is no longer asked about it.
- `TrustList`: remove the local workaround that filtered out this error;
plain "accept suppressible errors" is now enough.
- Docs (`Certificates.md`, `CertificateManager.md`): drop it from the
suppressible list, and fix a sample that suppressed it.

## Tests
- `ConfigurationNodeManagerPushTests`:
- A CA-signed renewal with the CA installed succeeds with a missing,
empty, unrelated or malformed issuer list, and the trust stores stay
unchanged.
- A renewal whose CA is only supplied as an issuer is rejected with
`BadCertificateChainIncomplete`; stores and the current certificate are
untouched.
- End to end on an isolated server: a CA-signed renewal with no issuer
list is committed through ApplyChanges.
- `ConfigurationNodeManagerPushValidationTests`: the group TrustList
validator accepts a CA from the trusted or issuer store and rejects an
uninstalled CA.
- `CertificateValidationCoreTests` / `CertificateValidatorTest`:
- An incomplete chain is unsuppressible and never reaches the callback.
- A leaf trusted directly **stays valid when the peer supplies its CA**
(§6.1.3: chain certificates "may be provided with the application
Certificate").
- One existing test attached its approver only after validating, so it
never exercised suppression; it now validates with the approver
attached.
- Tests that only passed because of the bug
(`PushCertificateRequestRegressionTests`, the regenerated-key helper and
the rollback test) now install the signing CA in the TrustList first.

The two new rejection tests fail on master and pass with this change.

## Reviewer notes / behavior change
This was suppressible in 1.5.x as well. Application code whose accept
handler approved a CA-signed peer certificate without its CA (CA neither
installed nor sent by the peer) will now get a rejection. Without a
handler such certificates were already rejected, and the stack's own
handlers (`ApplicationInstance`, push validation) never accepted this
error. Worth a release note.

Local runs (net10.0), all passing:

| Suite | Passed | Failed |
|---|---|---|
| Server.Tests | 8310 | 0 |
| Core.Tests (security/transport filter) | 2039 | 0 |
| Security.Certificates.Tests | 358 | 0 |
| Core.Security.Tests | 558 | 0 |
| Client.Tests | 2761 | 0 |
| Gds.Tests (PushTest and TrustList tests) | 345 | 0 |

The net48 builds of Server.Tests and Core.Tests also succeed.

## Related Issues

- Related to #4678 (master378 counterpart)

## 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.
- [ ] 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>
2026-10-06 18:14:17 +02:00
Copilot e78c648295 Images CI: publish samples once natively and stop compiling under QEMU (#4679)
# Description

Images CI took 45–100 min per image. The arm64 half of every
`linux/amd64,linux/arm64` build ran `dotnet restore` and `dotnet
publish` in an arm64 SDK container under QEMU. For `refserver`, publish
took 8 min natively for amd64 and 92 min emulated for arm64. On top of
that, every one of the 10 matrix legs recompiled the whole stack.

The output is framework-dependent portable IL, so the compile is now
done once, natively. The image legs only copy files onto the
per-platform runtime base image.

### Dockerfiles (all 10)
- **SDK stage runs on the build platform.** The `build` stage is pinned
to `--platform=$BUILDPLATFORM`. `-p:UseAppHost=false` keeps an x64 app
host out of the arm64 image.
- **New `prebuilt` stage.** It is chosen with a global `ARG
PUBLISH_SOURCE`, which defaults to `build`. Local `docker build` and the
`docker-compose` files are unchanged.
  ```dockerfile
  FROM scratch AS prebuilt
  ARG PUBLISH_DIR=artifacts/docker/publish
  COPY ${PUBLISH_DIR}/ /app/publish/

  FROM ${PUBLISH_SOURCE} AS publish
  ```
- **Pump: final-stage `RUN`s moved to a native stage.** The `sed` on
`openssl.cnf` and the `mkdir`/`chown`/`chmod` steps now run in a
`$BUILDPLATFORM` `layout` stage. The final stage copies `/layout/` to
`/`, so `/app` and `/diag` keep the `$APP_UID:0` owner and `g=u` mode
they had before. `openssl.cnf` therefore comes from the build-platform
base image. It is a plain config file, so it is expected to match
between architectures.

### `docker-image.yml`
- **Single image list.** The image list lives once, in `env.IMAGES`
(image, project, Dockerfile). `discover` emits it as the matrix.
- **New `publish-samples` job.** It runs `dotnet publish` for each
sample sequentially, so shared libraries compile once. It uses the same
options and NBGV version properties as the Dockerfiles and uploads the
output as the `docker-publish` artifact.
- **`build-and-push-image` legs.** Each leg:
  - downloads the artifact;
- builds with `PUBLISH_SOURCE=prebuilt` and
`PUBLISH_DIR=artifacts/docker/publish/<image>`;
  - no longer uses `setup-qemu-action`;
  - is named `build-and-push-image (<image>)`.
- **`images summary`.** It now also fails when `publish-samples` fails.

### Docs
- `ContainerReferenceServer.md` describes the publish-once / copy-only
flow and the build arguments.
- `DeveloperGuide.md` mentions the `publish-samples` job in the Images
CI section.

Expected: one native publish of about 7 min, then 10 parallel
copy-and-push legs of a few minutes each. Not yet confirmed on CI: the
sandbox could not pull MCR base images, so the prebuilt multi-platform
builds were checked against a Debian-based stand-in base, and the
build-from-source path was not built.

## Related Issues

## 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.
- [ ] 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: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: romanett <7413710+romanett@users.noreply.github.com>
2026-10-06 14:21:44 +02:00
Klaus Landsdorf cc7908eaa1 WebApi: serve a generated OpenAPI document of the REST binding (opt-in) and map the session-less service set (#4657)
Reworked after the review: the OpenAPI document is generated from the
code, not embedded; the route is opt-in; `StatusCode` is not accepted.
The branch is a new history on top of master (the first version
conflicted); master with #4674 is merged in.

# Description

The REST binding implements the routes of the OPC Foundation OpenAPI
mapping (OPC 10000-6 §G.3), but it does not describe them: `GET
/openapi.json` is answered with HTTP 405, and a client generator has
nothing to read from the server. `docs/WebApi.md` listed a generated
OpenAPI document as a deferred follow-up.

The coded API is the source of truth, so this PR **generates** the
document from the route table and from the structure definitions of the
request and response types, and compares it with the document the model
compiler publishes in tests. Nothing from `UA-Nodeset/OpenApi` ships in
the package.

## Changes

### Service sets (`Opc.Ua.Core`)

- `WebApiServiceSet` (`AllServices`, `Sessionless`) and
`WebApiServiceRoutes.GetRoutes(serviceSet)`. `Sessionless` is the eight
services of `opc.ua.openapi.sessionless.json` (OPC 10000-4 §6.3): Read,
Write, HistoryRead, HistoryUpdate, Call, Browse, BrowseNext,
TranslateBrowsePathsToNodeIds.

### Generator (`Opc.Ua.Core.Schema`, `Opc.Ua.Schema.OpenApi`)

- `WebApiOpenApiGenerator.Generate(serviceSet, includeSchemas,
serverUrl)` returns the OpenAPI 3.0 document as a `JsonObject`. It is
built at runtime from `WebApiServiceRoutes` and the
`StructureDefinition`/`EnumDefinition` of the message types (the same
definitions the schema generation uses, resolved through
`IDataTypeDefinitionResolver`). No reflection, so it is NativeAOT
compatible; the AOT test project covers it.
- **Two levels of detail**, because full schemas make big documents:

  | | Content | All 28 services |
  | --- | --- | --- |
| default | paths, `operationId`s, every body a JSON object | about 12
KB |
| `includeSchemas: true` | one component schema per message, structure
and enumeration (100), for typed client generators | about 46 KB |

  The two published files are about 300 KB together.
- The schemas describe the Compact JSON encoding, with the property
names, types, formats and integer ranges of the published documents.
DataValue is the one structure that differs: its status property is
`Status`, as in Part 6 Table 42.
- `OpenApiBuiltInSchemas` holds the schemas of the built-in types
(StatusCode, LocalizedText, Variant, DataValue, DiagnosticInfo,
ExtensionObject and the scalar types) as the encoder writes them.
Abstract `Structure` fields are ExtensionObjects, abstract number fields
are Variants.

### Serving the document (`Opc.Ua.Bindings.Https`)

- `WebApiTransportOptions`: `ServiceSet`, `OpenApiDocumentPath` (default
`null`: **off**) and `OpenApiIncludeSchemas` (default `false`).
- `MapWebApiEndpoints(WebApiTransportOptions)` maps the routes of the
service set and, when a path is set, the `GET` route of the document
**in the same route group**. The route has no `AllowAnonymous` metadata.
When an authentication scheme is registered, the contributor's
`group.RequireAuthorization()` covers the document like `POST /read`;
only `/findservers` and `/getendpoints` stay anonymous. The existing
`MapWebApiEndpoints()` maps all routes as before.
- The document is generated once per path base (listed as a relative
`servers` URL; without a path base the list is omitted) by the
`WebApiOpenApiGenerator` that `AddWebApiTransport` registers, or by a
default one.
- `Opc.Ua.Bindings.Https` references `Opc.Ua.Core.Schema` on net8.0 and
later.

### Documentation

- `docs/OpenApi.md` (new, linked from `docs/README.md`): serving the
document, the two levels, generating clients, the JSON generated clients
send, known issues, how the document is kept correct, troubleshooting.
- `docs/WebApi.md`: new section "Service sets and the OpenAPI document";
the deferred follow-up is removed. `docs/SchemaGeneration.md` and both
`NugetREADME.md` files describe the generator and the options.

## Comparison with the model compiler documents

The two published documents are test resources of
`Opc.Ua.Core.Schema.Tests` only (README next to them: source commit and
update procedure). `WebApiOpenApiConformanceTests` compares the
generated document with them for both service sets:

- paths, `operationId`s, and the request and response schema of every
operation;
- the set of component schemas the operations reach: equal (100 for all
services);
- every enumeration (members and values);
- for every structure: property names, types, formats, integer ranges,
and inheritance.

Everything both describe is equal. The test lists the differences and
fails when a listed one disappears or a new one appears:

| Difference | Generated | Published | Reason |
| --- | --- | --- | --- |
| DataValue status property | `Status` | `StatusCode` | Part 6 Table 42;
UA-Nodeset#146 is open. The stack only knows `Status` (encoder and
decoder). |
| `description`, `default` keywords | not written | spec links, .NET
defaults | documentation and defaults, not contract; Compact omits
default values |

`WebApiOpenApiWireFormatTests` validates what the binding really writes
(the default request and response of all 28 routes, plus populated
requests and responses with variants, status codes, references, identity
tokens and notifications) against the generated component schemas.

## Tests

- `Opc.Ua.Core.Schema.Tests` `OpenApi/`: `WebApiOpenApiGeneratorTests`
(shape of the document, both levels, both service sets, servers list,
sorting and determinism, concurrency, argument and resolver errors,
every built-in type, arrays and ranks, enumerations, option sets,
unions, base types, self-references, unknown definitions),
`WebApiOpenApiConformanceTests`, `WebApiOpenApiWireFormatTests`,
`OpenApiBuiltInSchemasTests`: 81 tests.
- `Opc.Ua.Bindings.Https.WebApi.Tests`:
`WebApiOpenApiDocumentEndpointTests` (TestServer with the startup
contributor: off by default, configured path, both levels, service set
maps and describes only the sessionless routes, path base, repeated
requests, registered generator is used, **a request without credentials
gets 401 when an authentication scheme is registered while one with
credentials gets 200, the route carries `IAuthorizeData` and no
`IAllowAnonymous`**, argument checks), options defaults and DI
registration of the generator.
- `Opc.Ua.Core.Tests`: `GetRoutes` for both sets and an undefined value.
- `Opc.Ua.Aot.Tests`: the generator and a served document under the AOT
fixture.
- Results (macOS arm64): `Opc.Ua.Core.Schema.Tests` 260/260,
`Opc.Ua.Bindings.Https.WebApi.Tests` 457/457, `Opc.Ua.Core.Tests` WebApi
tests 110/110, each on net10.0 and net8.0 (Release). `Opc.Ua.Aot.Tests`
(JIT run) SchemaAotTests 5/5, WebApiAotTests 8/8.
- `Opc.Ua.Core`, `Opc.Ua.Core.Schema` and `Opc.Ua.Bindings.Https` and
the three test projects build for net48, net8.0, net9.0 and net10.0
(Release) with 0 warnings and 0 errors (net48 builds only; the Windows
legs of the fork CI run its tests). `dotnet format` whitespace, style
and analyzers (`--severity info`) are clean on every changed file; the
two `RCS1090` hits in `SchemaAotTests.cs` are on lines that master
already has.
- Patch coverage with `.azurepipelines/check-coverage.ps1` against
master (`Opc.Ua.Core.Schema.Tests`, `Opc.Ua.Bindings.Https.WebApi.Tests`
and the WebApi tests of `Opc.Ua.Core.Tests`, net10.0): 362/362 changed
lines covered.
- Fork CI (full matrix incl. macOS) and CodeQL on `f990af5db` (master
with #4674 merged in): [CI run
37310622902](https://github.com/biancode/UA-.NETStandard/actions/runs/37310622902)
green, [CodeQL run
37310626786](https://github.com/biancode/UA-.NETStandard/actions/runs/37310626786)
green. The run on the earlier head `abda0e491` had one failure outside
this PR:
`McpServerProcessTests.HttpTransportAliasesExposeOnlyMcpRouteAsync("http")`
timed out after 30 s on Windows net10.0; this PR does not touch
`tools/`.

## Not in this PR

- Authentication: the fix discussed in the review is @romanett's #4674.
The document route uses whatever the REST routes use; this PR does not
change authentication.
- `StatusCode` tolerance in the decoder: dropped, the spec text is the
reference. The first commit of the previous version is gone.
- Samples.
- Session-less invocation on the server side (OPC 10000-4 §6.3) is a
separate draft PR. With `ServiceSet = Sessionless` this PR only limits
the mapped routes and the document.

## Questions

1. `Opc.Ua.Bindings.Https` now references `Opc.Ua.Core.Schema` (net8.0
and later) because the generator lives next to the other schema
generators and is trimmed away when unused. Fine, or should it move into
`Opc.Ua.Core`?
2. Should `OpenApiIncludeSchemas` default to `false` as here, or should
a host get typed clients out of the box?

## Related Issues

- Fixes #4656

## 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. (Affected
suites on net10.0 and net8.0 locally on macOS; .NET Framework is covered
by the fork CI's Windows net48 legs.)
- [ ] I fixed **all** failing and flaky tests in the CI pipelines and
**all** CodeQL warnings.
- [ ] I have addressed **all** PR feedback received.
2026-10-06 09:43:28 +02:00
Klaus Landsdorf b0d8ca0d3a Server: session-less service invocation (OPC 10000-4 §6.3) with AddSessionlessInvocation (#4659)
Marc answered the five design questions (2026-10-05). This update
implements the answers; see "Design decisions" at the end.

# Description

OPC 10000-4 §6.3 lets a client invoke a subset of the services without
CreateSession/ActivateSession. The request then carries either an Access
Token in `RequestHeader.authenticationToken` or no token at all. The
server today only offers the low-level
`ISessionManager.ValidateSessionLessRequest` event. Without a handler,
every request whose token names no session is answered with
`Bad_SessionIdInvalid`, including a request without a token. That is the
code a client of an expired session expects; for a session-less request,
§6.3.1 has a server that does not support the invocation answer
`Bad_ServiceUnsupported`.

This PR adds built-in session-less invocation behind an opt-in and keeps
the existing event as the way to take over completely.

## Changes

### `AddSessionlessInvocation()`
(`src/Opc.Ua.Server/Hosting/OpcUaServerBuilderExtensions.cs`)

```csharp
services.AddOpcUa()
    .AddServer(options => { /* … */ })
    .AddSessionlessInvocation(o => o.AllowAnonymous = false)  // the default
    .AddJwtIssuer(/* … */);   // validates the Access Tokens
```

- Registers `SessionlessInvocationOptions`.
`DependencyInjectionStandardServer` applies them to the `SessionManager`
in use, including one created by a registered session manager factory,
unless that manager already has options.
- Without dependency injection: `SessionManager.SessionlessInvocation =
new SessionlessInvocationOptions()`.
- Without either, nothing changes apart from the
`Bad_ServiceUnsupported` answer below.

### `SessionlessInvocationOptions` (new, `src/Opc.Ua.Server/Session/`)

- `AcceptAccessTokens` (default `true`): an Access Token in
`RequestHeader.authenticationToken`, carried as a String NodeId, is
handed to the server's identity registry (`IServerIdentityRegistry`, the
one ActivateSession uses) as an issued JWT token (OPC 10000-6
§7.6.5.2.3). The resulting identity runs the request. §6.3.1 requires an
encrypted channel for the token, so it is only accepted over
SignAndEncrypt or HTTPS.
- `AllowAnonymous` (default `false`): a request without a token runs as
an anonymous user. Without it, such a request is rejected with
`Bad_IdentityTokenInvalid`.
- `MaxConcurrentRequests` (default 64) and
`MaxConcurrentRequestsPerChannel` (default 16): the budget for
session-less requests, see below. Zero does not limit; a negative value
is rejected.

### Budget for session-less requests (`SessionlessRequestBudget`, new,
internal)

#4541 bounds channels and incomplete messages. A session-less request
has no Session to be accounted for, but it occupies a worker and keeps
its channel active. It gets a budget of its own:

- **Two limits**, checked and taken together under one
`System.Threading.Lock`: concurrent requests on the server, and on one
channel. A request refused by the channel limit takes no server-wide
place. The channel is the SecureChannel on opc.tcp. The HTTPS bindings
use one SecureChannel id per listener, so their requests are grouped by
peer address (IPv4-mapped IPv6 addresses count as IPv4).
- **Answer**: `Bad_ServerTooBusy` ("The Server does not have the
resources to process the request at this time."), the code #4541's
request queue uses when it has no room. `Bad_TooManyOperations` means
too many operations in one request, so it does not fit.
- **Lifetime**: the place is taken before the identity is checked, which
also bounds the validations that run at the same time. The lease is
attached to the `OperationContext` and returned when the context is
disposed, which every service does with `using`, however the request
ends (completed, failed, cancelled). A rejected token, a handler error
or exception, and a cancelled validation return it at once. A lease
releases once, however often it is disposed. Channel entries are removed
with their last request.
- **Scope**: it applies to every session-less request on a manager that
has `SessionlessInvocation` set, including requests a
`ValidateSessionLessRequest` handler decides. A handler without
`AddSessionlessInvocation` runs without a limit, as before. Requests
with a Session token and services outside the §6.3.1 set are not
counted.
- The limits are read for each request, so a change of the options
applies to the next request.

### `SessionManager`

- **Service sets:** a request without a session is limited to the
service sets §6.3.1 allows: View (without
RegisterNodes/UnregisterNodes), Attribute, Method, NodeManagement and
Query. Every other service keeps answering `Bad_SessionIdInvalid`.
`IsSessionlessService(RequestType)` is public.
- **Request without a token:** with session-less invocation not enabled
and no `ValidateSessionLessRequest` handler, it is answered with
`Bad_ServiceUnsupported` (§6.3.1). A token that names no session stays
`Bad_SessionIdInvalid`.
- **Precedence:** a registered `ValidateSessionLessRequest` handler
still decides first, unchanged apart from the service-set limit.
`ValidateSessionlessRequestAsync` is `protected virtual` for servers
that need their own rules.
- **Roles:** the identity of a session-less request goes through the
role resolution ActivateSession applies to the effective identity of a
Session (the `ResolveRoles` part of `AddMandatoryRoles`: the
`MustChangePassword` restriction, `IRoleManager.ResolveGrantedRoles`, so
mapped Access Token claims and the built-in AuthenticatedUser role).
This includes an identity a `ValidateSessionLessRequest` handler sets.
There is no client application certificate without a Session, so no
TrustedApplication role and no application-based mapping.
- **Cancellation:** cancelling an Access Token validation propagates as
`OperationCanceledException` so the endpoint maps it to the status of
the request lifetime (previously it became `Bad_UnexpectedError`). The
budget place is still returned.
- **Log:** a rejected Access Token is logged with a dedicated
`[LoggerMessage]` (`ServerEventIds.SessionManager + 18`, the next free
id after #4632).

### Documentation

- `docs/SessionlessInvocation.md` (new, linked from `docs/README.md`):
which services, enabling it, caller identity, the answers without the
feature, the request limits, the handler, calling the server over
opc.tcp and the REST binding.
- `docs/ResourceIsolation.md`: a short section "Requests without a
Session" pointing to the budget.
- `docs/DependencyInjection.md`: `AddSessionlessInvocation` in the
identity extension tables.

## Tests

- `Opc.Ua.Server.Tests/SessionlessInvocationTests` (mocked server
internals):
- `SessionlessRequestIsUnsupportedUnlessEnabled`,
`AnUnknownSessionTokenStaysBadSessionIdInvalid`,
`ServicesOutsideTheSessionlessSetStillNeedASession` (7 services),
`TheServiceSetLimitAppliesBeforeAValidateSessionLessRequestHandler`,
`AValidateSessionLessRequestHandlerTakesPrecedenceAsync`;
-
`SessionlessRequestWithoutIdentityIsRejectedUnlessAnonymousIsAllowedAsync`,
`SessionlessAccessTokenIsValidatedByTheIdentityRegistryAsync`,
`AnAccessTokenNoAuthenticatorHandlesIsRejected`,
`SessionlessAccessTokenRequiresAnEncryptedChannel` (None, Sign),
`SessionlessAccessTokenIsAcceptedOverSignAndEncryptAsync`,
`AccessTokensCanBeDisabled`,
`IsSessionlessServiceFollowsTheServiceSetsOfPartFour` (21 cases),
`ValidateSessionlessRequestRejectsMissingArguments`;
- wiring: `AddSessionlessInvocationRegistersTheConfiguredOptions`,
`AddSessionlessInvocationRejectsANullBuilder`,
`TheHostedServerAppliesTheOptionsToItsSessionManager`,
`TheHostedServerAppliesTheOptionsToAFactoryCreatedSessionManager`,
`TheHostedServerKeepsOptionsTheSessionManagerAlreadyHas`.
- End to end against the reference server,
`Opc.Ua.Sessions.Tests/SessionlessServiceInvocationTests` (opc.tcp,
`SessionClient` on a channel without CreateSession):
- `ReadWithAnAccessTokenNeedsNoSessionAsync` (SignAndEncrypt),
`AnAccessTokenOnAnUnencryptedChannelIsRejectedAsync`,
`ARequestWithoutAnIdentityIsRejectedAsync`,
`SubscriptionsStillNeedASessionAsync`;
- one sample per service set: `ViewServicesRunWithoutASessionAsync`
(Browse, TranslateBrowsePathsToNodeIds),
`AttributeServicesRunWithoutASessionAsync` (Write, HistoryRead),
`MethodServicesRunWithoutASessionAsync` (Call),
`NodeManagementServicesRunWithoutASessionAsync` (AddNodes). They check
that the service runs and reports its operation result, not a missing
session or an internal error, since #4632 hardened only
Browse/BrowseNext against a missing session. Query is not sampled:
`StandardServer` does not implement QueryFirst/QueryNext.
- REST binding,
`HttpsWebApiIntegrationTests.SessionlessReadOverRestRunsWithAnAccessTokenAsync`
(Compact and Verbose): `POST /read` with the Access Token as String
NodeId (`"AuthenticationToken": "s=<token>"`), and the same request
without a token.
- **Budget**, `Opc.Ua.Server.Tests/SessionlessRequestBudgetTests` (22
tests):
- the budget itself: server limit and release, channel limit that takes
nothing from the server, server limit checked first, zero does not
limit, a lease releases once, HTTPS grouped by peer address (IPv4-mapped
form too), 200 concurrent callers against the limits (exactly the limit
granted, none above the channel limit, parallel release leaves zero and
no tracked channel), 16 callers acquiring and releasing in a loop
(high-water mark never above the limit);
- through `SessionManager.ValidateRequestAsync`: `Bad_ServerTooBusy`
over the server and the channel limit, disposing a context twice
releases once, places returned after a rejected Access Token, an
unencrypted channel, a missing identity, a cancelled validation (while
it waits, the place is taken), a handler error and a handler exception;
the budget also limits requests a handler decides, and a handler-only
server has none; requests outside the service set and requests a
disabled server refuses take no place; changed limits apply to the next
request and new options start a new budget;
  - options: finite defaults, negative values rejected.
- **Budget end to end**,
`Opc.Ua.Sessions.Tests/SessionlessServiceInvocationTests.SessionlessRequestsRunInABudgetOfTheirOwnAsync`
(opc.tcp, requests held in the Access Token validation): the third
request over a limit of two gets `Bad_ServerTooBusy`; after release,
five sequential reads and five reads of an unknown node (operation
result bad) all pass; a channel limit of one refuses the second request
on that channel while another channel's request is admitted.
`ARequestWithoutATokenIsUnsupportedWhileTheFeatureIsOffAsync`:
`Bad_ServiceUnsupported` for a request without token on a server without
the feature, `Bad_SessionIdInvalid` for a token that names no Session.
- **Fail without the change**: the places-returned tests fail when the
budget does not release on failure (4 of 22 fail with the release in
`SessionManager` removed; the other budget tests use API this change
adds). `SessionlessRequestIsUnsupportedUnlessEnabled` and
`TheServiceSetLimitAppliesBeforeAValidateSessionLessRequestHandler` are
unchanged from the first version.
- **Review follow-up (`e9a35980b`)**:
`SessionlessAccessTokenReceivesTheRolesMappedFromItsClaimsAsync`,
`SessionlessAccessTokenWithoutTheMappedClaimIsNotGrantedTheRoleAsync`,
`AnAnonymousSessionlessRequestIsGrantedTheAnonymousRoleOnlyAsync`,
`TheIdentityOfAValidateSessionLessRequestHandlerReceivesTheMappedRolesAsync`,
`AValidateSessionLessRequestHandlerThatSetsNoIdentityKeepsNoIdentityAsync`;
end to end
`ARoleMappedNodeIsReadWithTheRolesMappedFromTheAccessTokenAsync` (the
ServerDiagnosticsSummary, readable for SecurityAdmin only, is denied for
a token whose claim is not mapped, readable once the rule maps it,
denied for another token) and
`ACancelledAccessTokenValidationAnswersTheTimeoutAndReturnsItsPlaceAsync`.
The anonymous and no-identity tests guard unchanged behavior. With the
`SessionManager.cs` change removed the three claim-mapping tests, the
end-to-end role test (`Bad_UserAccessDenied`), the end-to-end
cancellation test (`Bad_UnexpectedError` instead of `Bad_Timeout`) and
`ACancelledValidationReturnsItsPlaceAsync` fail. Lines of this commit
were not re-measured for patch coverage; the figure below is for
`496f84fce`.
- **`ClientTest`**: the three assertions that accepted
`Bad_ServiceUnsupported` too are back to master (`Bad_SessionIdInvalid`
only), so the PR no longer touches that file. Since #4646 a closed
`Session` refuses a request without authenticationToken itself; the
server code is not reached. The three tests pass with the single code
(12 cases on net10.0).
- Results on macOS: `Opc.Ua.Server.Tests` full run on net10.0 8076
passed / 9 skipped / 1 failed
(`ACancelledValidationReturnsItsPlaceAsync`, which asserted the old
`Bad_UnexpectedError` mapping; updated to the propagated cancellation
and passing); the session-less, SessionManager and role filters 368
passed / 0 failed on net10.0 and on net8.0, and the session-less
invocation and budget tests 73 passed on net10.0 after the last test was
added. `Opc.Ua.Sessions.Tests` with the
HTTPS/WebApi/WSS/OpenApi/Sessionless/ClientTest filter: 400 passed / 241
skipped / 0 failed on net10.0 and on net8.0 (the earlier host-name
failures were an environment issue of the test machine and are gone).
- Builds: `Opc.Ua.Server`, `Opc.Ua.Server.Tests` and
`Opc.Ua.Sessions.Tests` for net48, net8.0, net9.0 and net10.0 and
`Opc.Ua.Server` in Release net10.0: 0 errors, no new warnings (the
CA2213 in `SamplingGroup.cs` and the CA1861/CA2025 in other test files
are on master too).
- `dotnet format` (whitespace, style, analyzers `--severity info`, one
`--include` per changed file): no finding on a changed line. What
remains is on master lines (`SessionManager.cs` 552, 1374, 2205 and
`DependencyInjectionStandardServer.cs` 228) and the line-ending finding
of a macOS checkout.
- Coverage (`.azurepipelines/check-coverage.ps1` against master, only
the session-less tests of `Opc.Ua.Server.Tests` on net10.0): patch
105/116 changed lines (90.5 %). The 11 uncovered lines are Session-bound
lines of `ValidateRequestAsync` and the lockout logger that moved with
the change; the rest of the suite covers them. The project floor is not
meaningful for this subset.
- Fork CI and CodeQL: previous head `0fba9f21d` (master incl. #4674
merged): [CI run
37307824769](https://github.com/biancode/UA-.NETStandard/actions/runs/37307824769)
green (one net48 timing test, `KeepAliveHandlerV2Async`, failed in the
first attempt and passed on the job rerun; the PR does not touch
subscriptions), [CodeQL run
37307829138](https://github.com/biancode/UA-.NETStandard/actions/runs/37307829138)
green. Current head `e9a35980b`: [CI run
37364178979](https://github.com/biancode/UA-.NETStandard/actions/runs/37364178979),
[CodeQL run
37364182697](https://github.com/biancode/UA-.NETStandard/actions/runs/37364182697)
(results pending).

## Design decisions

Marc's answers (2026-10-05) and what the PR does:

1. **Built in** when `AddSessionlessInvocation` was used. Done.
2. **Service-set limit for all paths**: it applies before a
`ValidateSessionLessRequest` handler too. Done, unchanged.
3. **`Bad_ServiceUnsupported`** for a request without a token on a
server without the feature. Done, unchanged. A token that names no
Session stays `Bad_SessionIdInvalid`.
4. **Identity model**: an Access Token in the RequestHeader, validated
as an issued JWT token through the identity registry, anonymous only by
opt-in. Unchanged. The REST authentication is #4674, now in master.
5. **Separate budget** for session-less requests: added, see "Budget for
session-less requests". Open: no limit per identity yet (identities are
claims-defined, so the keys would be unbounded); say if you want one.

## Related Issues

- Fixes #4658
- Relates to #4657 (the REST binding's session-less service set), #4646
(a closed `Session` no longer sends requests without token), #4541
(resource isolation) and #4674 (REST authentication)

## 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. (Affected
suites on net10.0 and net8.0 locally on macOS; .NET Framework is covered
by the fork CI's Windows net48 legs.)
- [ ] 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>
2026-10-06 07:07:52 +00:00