Module segmentation 

Segmentation: split and reassemble large APDU payloads.

Per ASHRAE 135-2020 Clause 9, segmented messages use 8-bit sequence numbers with windowed flow control. This module provides the basic payload splitting and reassembly primitives.

Structs

SegmentReceiver

Collects received segments for reassembly.

Enums

SegmentedPduType

PDU types that affect segmentation overhead calculation.

Functions

duplicate_in_window

Return whether sequence_number is a duplicate in the current incomplete window.

max_segment_payload

Compute the maximum service data payload per segment.

split_payload

Split a payload into segments of at most max_segment_size bytes.