Module uslp 

Unified Space Data Link Protocol (CCSDS 732.1-B-3). Unified Space Data Link Protocol (USLP)

Spec: https://ccsds.org/Pubs/732x1b3e1.pdf

USLP (CCSDS 732.1-B-3) defines a unified transfer frame format that replaces the separate TM, TC, and AOS frame protocols. It supports both fixed-length and variable-length frames with a variable-size primary header (4-14 bytes).

Frame Layout

+-------------------------------------+---------+
| Field                               | Size    |
+-------------------------------------+---------+
| Primary Header (fixed part)         | 7 bytes |
|   TFVN + SCID + Src/Dst + VCID      |         |
|   + MAP ID + EOFPH Flag             | 4 bytes |
|   Frame Length                      | 2 bytes |
|   Flags + VCF Count Length          | 1 byte  |
| Primary Header (VCF Count)          | 0-7 B   |
+-------------------------------------+---------+
| Insert Zone (optional)              | Varies  |
+-------------------------------------+---------+
| Transfer Frame Data Field           |         |
|   TFDF Header (rules + UPID)        | 1 byte  |
|   First Header / Last Octet Ptr     | 0 or 2  |
|   Transfer Frame Data Zone          | Varies  |
+-------------------------------------+---------+
| Operational Control Field (opt)     | 4 bytes |
+-------------------------------------+---------+
| Frame Error Control Field (opt)     | 2 bytes |
+-------------------------------------+---------+

Modules

bitmask

Bitmasks for USLP Transfer Frame header fields.

Structs

UslpFrameReader

Extracts packets from a received USLP transfer frame.

UslpFrameWriter

Accumulates packets into USLP transfer frames.

UslpFrameWriterConfig

Configuration for building USLP transfer frames.

UslpPrimaryHeaderFixed

The 7-byte fixed portion of a non-truncated USLP Primary Header.

UslpTransferFrame

A zero-copy view over a USLP Transfer Frame.

UslpTransferFrameBuilder

Use builder syntax to set the inputs and finish with build().

Enums

BuildError

An error during USLP frame construction.

ParseError

An error during USLP frame parsing.

TfdzRule

TFDZ Construction Rules (CCSDS 732.1-B-3, Table 4-3).

Upid

Well-known USLP Protocol Identifier (UPID) values.

Constants

OID_VCID

VCID reserved for Only Idle Data (OID) Transfer Frames.

USLP_TFVN

USLP Transfer Frame Version Number (0b1100 = 12).