Module gatt 

Service-agnostic frame segmentation and reassembly for GATT links.

This implements the GATT Frame Transport from docs/protocol/src/ulcp-ble.md: one SAR header octet per ATT value, no HDLC escaping or checksum, and bounded reassembly state.

Structs

Reassembler

Bounded reassembly state for one GATT characteristic.

Segment

One header-prefixed GATT frame segment.

Segments

Iterator returned by segments.

Enums

DecodeError

Segment decoding/reassembly failure.

EncodeError

Segment encoding failure.

Constants

FRAME_IN_UUID

ULCP Frame In characteristic UUID.

FRAME_OUT_UUID

ULCP Frame Out characteristic UUID.

MAX_FRAME

Maximum reassembled frame size for the ULCP GATT Service.

SAR_COMPLETE

SAR value for a frame contained in one segment.

SAR_CONT

SAR value for a middle segment of a multi-segment frame.

SAR_FIRST

SAR value for the first segment of a multi-segment frame.

SAR_LAST

SAR value for the final segment of a multi-segment frame.

SERVICE_UUID

ULCP GATT Service UUID.

Functions

segments

Split one frame into segments carrying at most seg_payload frame bytes.

uuid

Return a UMSH UUID with slot spliced into the second UUID group.