Joseph Doherty
b3907efa6e
Re-review at 7286d320. -014 (Medium): ReadAtTimeAsync didn't classify StartQuery failures,
so a connection-class failure left a dead connection, re-failed every timestamp, and returned
Success=true with all-Bad (no failover); now resets+fails over via a shared classifier + tests.
-015: refresh stale named-pipe comments to TCP (no wire change). -013 (silent cap truncation,
ties OpcUaServer-002/Core.Abstractions-009) deferred cross-module. NOTE: the SDK-touching tests
are net48 + native aahClientManaged and run only on Windows; macOS verifies build + the SDK-free
subset only.
49 lines
1.7 KiB
C#
49 lines
1.7 KiB
C#
namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Ipc;
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/// <summary>
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/// Length-prefixed framing constants for the Wonderware historian sidecar TCP protocol.
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/// Each frame on the wire is:
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/// <c>[4-byte big-endian length][1-byte message kind][MessagePack body]</c>.
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/// Length is the body size only; the kind byte is not part of the prefixed length.
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/// </summary>
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/// <remarks>
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/// Mirrors the Galaxy.Shared framing exactly so the same FrameReader/FrameWriter pattern
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/// works on both sides. The sidecar's protocol is independent — both the .NET 4.8 server
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/// side and the .NET 10 client (PR 3.4) carry their own copies of these constants and
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/// stay in sync via the round-trip test matrix.
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/// </remarks>
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public static class Framing
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{
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public const int LengthPrefixSize = 4;
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public const int KindByteSize = 1;
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/// <summary>16 MiB cap protects the receiver from a hostile or buggy peer.</summary>
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public const int MaxFrameBodyBytes = 16 * 1024 * 1024;
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}
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/// <summary>
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/// Wire identifier for each historian sidecar message. Values are stable — never reorder;
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/// append new contracts at the end. The .NET 10 client and the .NET 4.8 sidecar must
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/// agree on every value here.
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/// </summary>
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public enum MessageKind : byte
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{
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Hello = 0x01,
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HelloAck = 0x02,
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ReadRawRequest = 0x10,
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ReadRawReply = 0x11,
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ReadProcessedRequest = 0x12,
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ReadProcessedReply = 0x13,
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ReadAtTimeRequest = 0x14,
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ReadAtTimeReply = 0x15,
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ReadEventsRequest = 0x16,
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ReadEventsReply = 0x17,
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WriteAlarmEventsRequest = 0x20,
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WriteAlarmEventsReply = 0x21,
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}
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