Files
histsdk/docs/reverse-engineering/dnlib-sbytestream-getlength-latest.json
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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{
"Path": "C:\\Users\\dohertj2\\Desktop\\histsdk\\current\\aahClientManaged.dll",
"Filter": "0x0600100C",
"IsILOnly": false,
"IsMixedMode": true,
"Methods": [
{
"DeclaringType": "\u003CModule\u003E",
"Name": {
"String": "SByteStream\u003CSCrtMemFile\u003E.GetLength",
"Data": "U0J5dGVTdHJlYW08U0NydE1lbUZpbGU+LkdldExlbmd0aA==",
"Length": 34,
"DataLength": 34
},
"Token": "0x0600100C",
"Rva": "0x00064FE8",
"IsStatic": true,
"IsPublic": false,
"HasBody": true,
"InstructionCount": 8,
"Locals": [],
"Calls": [],
"Instructions": [
{
"Offset": "0x0000",
"OpCode": "ldarg.0",
"Operand": null,
"Token": null
},
{
"Offset": "0x0001",
"OpCode": "ldind.i8",
"Operand": null,
"Token": null
},
{
"Offset": "0x0002",
"OpCode": "ldc.i4.8",
"Operand": null,
"Token": null
},
{
"Offset": "0x0003",
"OpCode": "conv.i8",
"Operand": null,
"Token": null
},
{
"Offset": "0x0004",
"OpCode": "add",
"Operand": null,
"Token": null
},
{
"Offset": "0x0005",
"OpCode": "ldind.i4",
"Operand": null,
"Token": null
},
{
"Offset": "0x0006",
"OpCode": "conv.u8",
"Operand": null,
"Token": null
},
{
"Offset": "0x0007",
"OpCode": "ret",
"Operand": null,
"Token": null
}
]
}
]
}