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VMTI Local Set Decode

This structural rule validates MISB ST 0903 VMTI metadata carried inside MISB ST 0601 Tag 74.

What This Test Does​

The rule:

  • scans decoded MISB ST 0601 packets for Tag 74 VMTI Local Set payloads
  • passes each Tag 74 value to the libmisb MISB ST 0903 validator
  • checks that the nested payload decodes as a valid BER-encoded MISB ST 0903 local set

✅ Pass Criteria​

The test passes when every detected Tag 74 payload decodes as a valid MISB ST 0903 VMTI local set.

❌ Fail Criteria​

The test fails when a Tag 74 payload is truncated, malformed, or otherwise cannot be decoded as a BER-tagged MISB ST 0903 local set.

Notes​

This rule is evaluated against the nested VMTI local set, but the reported packet location points to the outer MISB ST 0601 packet that carried the failing Tag 74 payload.