68 lines
2.1 KiB
C#
68 lines
2.1 KiB
C#
namespace ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Shared.Contracts;
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/// <summary>
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/// Length-prefixed framing per decision #28. Each IPC frame 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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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>
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/// Maximum permitted body length (16 MiB). Protects the receiver from a hostile or
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/// misbehaving peer sending an oversized length prefix.
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/// </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 contract. Values are stable — new contracts append.
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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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Heartbeat = 0x03,
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HeartbeatAck = 0x04,
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OpenSessionRequest = 0x10,
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OpenSessionResponse = 0x11,
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CloseSessionRequest = 0x12,
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DiscoverHierarchyRequest = 0x20,
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DiscoverHierarchyResponse = 0x21,
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ReadValuesRequest = 0x30,
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ReadValuesResponse = 0x31,
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WriteValuesRequest = 0x32,
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WriteValuesResponse = 0x33,
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SubscribeRequest = 0x40,
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SubscribeResponse = 0x41,
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UnsubscribeRequest = 0x42,
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OnDataChangeNotification = 0x43,
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AlarmSubscribeRequest = 0x50,
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AlarmEvent = 0x51,
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AlarmAckRequest = 0x52,
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HistoryReadRequest = 0x60,
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HistoryReadResponse = 0x61,
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HistoryReadProcessedRequest = 0x62,
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HistoryReadProcessedResponse = 0x63,
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HistoryReadAtTimeRequest = 0x64,
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HistoryReadAtTimeResponse = 0x65,
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HistoryReadEventsRequest = 0x66,
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HistoryReadEventsResponse = 0x67,
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HostConnectivityStatus = 0x70,
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RuntimeStatusChange = 0x71,
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RecycleHostRequest = 0xF0,
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RecycleStatusResponse = 0xF1,
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ErrorResponse = 0xFE,
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}
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