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dohertj2 c95824a65d Initial commit: managed .NET 10 AVEVA Historian SDK + reverse-engineering toolkit

Full read-only SDK (src/AVEVA.Historian.Client) implementing the CLAUDE.md required
surface against AVEVA Historian's binary WCF protocol — no native AVEVA runtime
dependency. All operations live-verified against a local Historian:

- ProbeAsync, ReadRawAsync, ReadAggregateAsync, ReadAtTimeAsync, ReadEventsAsync
- BrowseTagNamesAsync, GetTagMetadataAsync (17 native data-type codes mapped)
- GetConnectionStatusAsync, GetStoreForwardStatusAsync, GetSystemParameterAsync
- 108/108 unit + integration tests pass

Includes the reverse-engineering toolkit (tools/AVEVA.Historian.ReverseEngineering)
used to decode the protocol: WCF probes, IL inspection via dnlib, and IL-rewrite
instrumentation (instrument-wcf-{write,read}message etc.) plus the .NET Framework
trace harness (tools/AVEVA.Historian.NativeTraceHarness) for parity testing.

Sanitized handoff evidence under docs/reverse-engineering/. Native AVEVA binaries
(current/, aveva-install-x64/, aveva-install-x86/) are gitignored — fetch separately
from the AVEVA installer.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-04 06:31:48 -04:00

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WCF Status Evidence

Commands:

dotnet run --no-build --project tools\AVEVA.Historian.ReverseEngineering -- wcf-status localhost 32568
dotnet run --no-build --project tools\AVEVA.Historian.ReverseEngineering -- wcf-status localhost 32568 Version

Confirmed:

The local status endpoint is net.tcp://localhost:32568/Stat.
IStatusServiceContract2 is a static WCF contract named Stat in namespace aa. The managed definitions now include GetSystemParameter, GETHI, PNGS, and PNGP.
GetInterfaceVersion returns code 0, version 0 on the local 2020 install.
The decompiled CStatusConnectionWCF.GetServerTime implementation is a WCF-path stub that returns success without calling the Stat service. The managed direct call likewise returns code 0 with size 0 and no buffer.

Observed sanitized localhost results:

GetSystemTimeZoneName(handle: 0) returns code 4 and no value.
IsDBCaseSensitive(handle: 0) returns code 4.
GetSystemParameter(handle: 0, "Version") returns false with no error buffer.

Interpretation:

Stat endpoint routing is confirmed, but status operations that require a real client handle are not usable until managed session open is solved.
GetServerTime should not be promoted into the public SDK as a real server time call from this WCF path; native evidence shows it is a no-op stub here.

1.4 KiB Raw Blame History

WCF Status Evidence

1.4 KiB

Raw Blame History