Module multipart 

Multi-part message engine.

Spec: §5.10, Table 4

When a command or reply payload is larger than a single packet supports, the data block is prefixed with a 6-byte multi-part header:

+---------------+--------------+--------------------+
| MpSizeTotal   | MpOffset     | MpFragmentSize     |
| (u16 LE)      | (u16 LE)     | (u16 LE)           |
+---------------+--------------+--------------------+

Rules enforced by this module:

• First fragment is always at offset 0.
• Fragments are strictly sequential (no gaps, no reorder).
• All fragments report the same MpSizeTotal.
• Sender may abort by setting MpOffset >= MpSizeTotal and MpFragmentSize = 0.

Structs

MultipartHeader

Multi-part header on the wire.

MultipartRx

Reassembler for incoming multi-part transfers.

MultipartTx

Iterator-style splitter for outgoing multi-part transfers.