{185614792}: net: bound cluster HELLO fields by the received body length

[chands10]

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[roborivers]

Cbuild submission: Error ⚠.
Regression testing: Success ✓.

The first 10 failing tests are:
sc_constraints
sc_constraints_logicalsc_generated
timepart_retro
unionpar_maxqueue
sc_resume_logicalsc_generated **quarantined**
sc_resume
sc_partial_datacopy_logicalsc_generated **quarantined**
sc_partial_datacopy
sc_datacopy_logicalsc_generated **quarantined**
sc_datacopy