Modbus TCP MBAP Header Structure Auditor
Audits Modbus Application Protocol (MBAP) header fields for TCP/IP framing.
Notice: engineering verification utility. Use test or de-identified data and verify results independently before relying on them.
How it works
Standard: Modbus Messaging Implementation Guide V1.0b
Formula: Verify Transaction ID (2 bytes), Protocol ID (2 bytes = 0x0000), Length (2 bytes), Unit ID (1 byte)
Checks: Protocol ID equals 0x0000; length matches remaining payload bytes
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Deterministic local-first client-side execution. Provided as-is without warranty.