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
commit c95824a65d
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+using System.Runtime.Versioning;
+using System.ServiceModel;
+using System.ServiceModel.Channels;
+using AVEVA.Historian.Client.Models;
+using AVEVA.Historian.Client.Wcf.Contracts;
+
+namespace AVEVA.Historian.Client.Wcf;
+
+[SupportedOSPlatform("windows")]
+internal static class HistorianWcfStatusClient
+{
+    public static Task<string?> GetSystemParameterAsync(
+        HistorianClientOptions options,
+        string parameterName,
+        CancellationToken cancellationToken)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(parameterName);
+        return Task.Run(() => GetSystemParameter(options, parameterName), cancellationToken);
+    }
+
+    public static Task<HistorianConnectionStatus> GetConnectionStatusAsync(
+        HistorianClientOptions options,
+        CancellationToken cancellationToken)
+    {
+        return Task.Run(() => SynthesizeConnectionStatus(options), cancellationToken);
+    }
+
+    public static Task<HistorianStoreForwardStatus> GetStoreForwardStatusAsync(
+        HistorianClientOptions options,
+        CancellationToken cancellationToken)
+    {
+        return Task.Run(() => SynthesizeStoreForwardStatus(options), cancellationToken);
+    }
+
+    private static string? GetSystemParameter(HistorianClientOptions options, string parameterName)
+    {
+        Guid contextKey = Guid.NewGuid();
+        var (histBinding, histEndpoint, _, _) = HistorianWcfBindingFactory.CreateBindingPair(options);
+        EndpointAddress statusEndpoint = HistorianWcfBindingFactory.CreatePipeEndpointAddress(options.Host, HistorianWcfServiceNames.Status);
+
+        string? value = null;
+        HistorianWcfAuthChainHelper.OpenAuthenticatedConnection(
+            options, histBinding, histEndpoint, contextKey, CancellationToken.None,
+            additionalSetup: (_, context) => value = QuerySystemParameter(histBinding, statusEndpoint, context.ClientHandle, parameterName));
+        return value;
+    }
+
+    private static string? QuerySystemParameter(Binding statusBinding, EndpointAddress statusEndpoint, uint clientHandle, string parameterName)
+    {
+        ChannelFactory<IStatusServiceContract2> factory = new(statusBinding, statusEndpoint);
+        IStatusServiceContract2 channel = factory.CreateChannel();
+        ICommunicationObject co = (ICommunicationObject)channel;
+        try
+        {
+            bool ok = channel.GetSystemParameter(clientHandle, parameterName, out string parameterValue, out _, out _);
+            return ok ? parameterValue : null;
+        }
+        finally
+        {
+            try { if (co.State == CommunicationState.Faulted) co.Abort(); else co.Close(); } catch { try { co.Abort(); } catch { } }
+            try { if (factory.State == CommunicationState.Faulted) factory.Abort(); else factory.Close(); } catch { try { factory.Abort(); } catch { } }
+        }
+    }
+
+    /// <remarks>
+    /// AVEVA's native <c>HistorianAccess.GetConnectionStatus</c> reads local C++
+    /// <c>HistorianClient</c> state (no WCF op exists for it). We synthesize an equivalent
+    /// by attempting an authenticated session open: a successful auth+open implies
+    /// <c>ConnectedToServer = true</c>. Store-forward and partner-connection state are not
+    /// observable from a single client probe and remain false.
+    /// </remarks>
+    private static HistorianConnectionStatus SynthesizeConnectionStatus(HistorianClientOptions options)
+    {
+        bool connected;
+        string? error = null;
+        try
+        {
+            Guid contextKey = Guid.NewGuid();
+            var (histBinding, histEndpoint, _, _) = HistorianWcfBindingFactory.CreateBindingPair(options);
+            HistorianWcfAuthChainHelper.OpenAuthenticatedConnection(
+                options, histBinding, histEndpoint, contextKey, CancellationToken.None);
+            connected = true;
+        }
+        catch (Exception ex)
+        {
+            connected = false;
+            error = $"{ex.GetType().Name}: {ex.Message}";
+        }
+
+        return new HistorianConnectionStatus(
+            ServerName: options.Host,
+            Pending: false,
+            ErrorOccurred: !connected,
+            Error: error,
+            ConnectedToServer: connected,
+            ConnectedToServerStorage: connected,
+            ConnectedToStoreForward: false,
+            ConnectionKind: HistorianConnectionKind.Process);
+    }
+
+    /// <remarks>
+    /// Native <c>HistorianAccess.GetStoreForwardStatus</c> is also client-side state.
+    /// Without a local store-forward sidecar to probe, we report defaults: not pending,
+    /// no error, no data stored, not actively storing. Connection kind is Process by
+    /// convention (event-only sessions are uncommon for this status helper).
+    /// </remarks>
+    private static HistorianStoreForwardStatus SynthesizeStoreForwardStatus(HistorianClientOptions options)
+    {
+        return new HistorianStoreForwardStatus(
+            ServerName: options.Host,
+            Pending: false,
+            ErrorOccurred: false,
+            Error: null,
+            DataStored: false,
+            Storing: false,
+            ConnectionKind: HistorianConnectionKind.Process);
+    }
+}