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Marc Schier c781514ad5 Refactor pcap diagnostics: decorator binding + rename to Opc.Ua.Bindings.Pcap
Three changes addressing the design feedback on PR #3855:

1. Renamed Stack/Opc.Ua.Diagnostics.Pcap -> Stack/Opc.Ua.Bindings.Pcap (and the corresponding test project). PackageId, AssemblyName and RootNamespace updated to Opc.Ua.Bindings.Pcap; references in McpServer, signlists, slnx files, docs, and the interop-tester agent updated; Opc.Ua.Core's InternalsVisibleTo entries updated.

2. Replaced UaSCUaBinaryChannel.FrameCaptureSink + per-call NotifyFrameCaptureSink null check with a transport-binding decorator. New files in Opc.Ua.Bindings.Pcap/Bindings:
   - IChannelCaptureRegistry / ChannelCaptureRegistry: singleton with a volatile IFrameCaptureSink slot (1 atomic write to switch recording on/off).
   - CapturingMessageSocket / CapturingMessageSocketFactory: IMessageSocket decorator that taps Send/Receive bytes via a single volatile read of CurrentObserver.
   - PcapTransportChannelBinding: ITransportChannelFactory decorator that injects the capturing socket factory into every TcpTransportChannel and wires ISecureChannel.OnTokenActivated through to the active observer.
   - PcapBindings.Install(): non-DI installer for direct TransportBindings.Channels.SetBinding wiring.

   IFrameCaptureSink moved to Opc.Ua.Core/Stack/Bindings and gained an OnTokenActivated method so the binding can publish key material alongside chunks. UaSCUaBinaryChannel.FrameCaptureSink property and all three NotifyFrameCaptureSink call sites removed - hot path returns to original shape with zero indirection when the binding is not installed. IMessageSocketAsyncEventArgs gains Offset + Count getters (additive).

   AddOpcUaDiagnosticsPcap/Formatters/Replay extension methods renamed to AddOpcUaBindingsPcap[Formatters|Replay]; the new AddOpcUaBindingsPcap also installs the binding into TransportBindings.Channels.

   InProcessClientCaptureSource / InProcessServerCaptureSource: dropped reflection-based AttachClientChannel/AttachServerChannel. The source itself implements IFrameCaptureSink and on Start publishes itself as the registry observer; on Stop clears it. McpServer's PacketCaptureTools simplified accordingly (no more per-channel attach loop).

3. Discarded the source-generator suggestion. Confirmed that the dissection path already 100% reuses the source-generated decoders: UaSCUaBinaryChannel.ReadSymmetricMessage for chunk decryption and BinaryDecoder.ReadEncodeable + EncodeableFactory.GlobalFactory (populated by Tools/Opc.Ua.SourceGeneration's DataTypeGenerator) for service-type decoding. Emitting additional dissection code would duplicate what's already there.

Validation:
- Full UA.slnx builds clean: 0 errors, 2 pre-existing unrelated warnings.
- All 53 tests pass on net10.0 (49 existing + 4 new CapturingMessageSocketTests covering hot-path: not-installed/installed-off/installed-on costs, byte equality, exception isolation).
- CI command line (dotnet build/test --framework net10.0 --configuration Release /p:CustomTestTarget=net10.0) reproduces clean locally.
2026-06-07 21:53:53 +02:00

85 lines
3.1 KiB
C#

/* ========================================================================
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using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using Opc.Ua.Bindings.Pcap.KeyLog;
namespace Opc.Ua.Bindings.Pcap.KeyLog
{
/// <summary>
/// Writes a stream of <see cref="ChannelKeyMaterial"/> snapshots to a
/// keylog file. Implementations are append-only and must be safe to
/// call from multiple threads.
/// </summary>
public interface IKeyLogWriter : IAsyncDisposable
{
/// <summary>
/// Path of the file being written.
/// </summary>
string FilePath { get; }
/// <summary>
/// Appends a single key-material record.
/// </summary>
ValueTask AppendAsync(ChannelKeyMaterial material, CancellationToken ct);
/// <summary>
/// Flushes pending writes to disk.
/// </summary>
ValueTask FlushAsync(CancellationToken ct);
}
/// <summary>
/// Reads a sequence of <see cref="ChannelKeyMaterial"/> records from
/// a keylog file.
/// </summary>
public interface IKeyLogReader
{
/// <summary>
/// Reads every record from the given path. Implementations may
/// stream lazily for large files.
/// </summary>
IAsyncEnumerable<ChannelKeyMaterial> ReadAllAsync(
string filePath,
CancellationToken ct);
/// <summary>
/// Reads every record from the given stream. The stream is read
/// to end; the caller owns its lifetime.
/// </summary>
IAsyncEnumerable<ChannelKeyMaterial> ReadAllAsync(
Stream stream,
CancellationToken ct);
}
}