MoQT draft-08 Control Message Types

MoQT draft-08 defines 26 control message types and marks 0 code points reserved — 26 rows in all. The type code is the first field of every control message, so this is the table a decoder dispatches on.

The rows come from the draft's own Control Messages table, not from a hand-kept list. For the field layout of a message, follow its section link into the draft-08 text.

What changed since draft-07

Added

• 0x1A SUBSCRIBES_BLOCKED

Control message types

Type	Message	Defined in	Test vectors
0x2	SUBSCRIBE_UPDATE	§7.5	4
0x3	SUBSCRIBE	§7.4	9
0x4	SUBSCRIBE_OK	§7.15	5
0x5	SUBSCRIBE_ERROR	§7.16	8
0x6	ANNOUNCE	§7.22	3
0x7	ANNOUNCE_OK	§7.9	3
0x8	ANNOUNCE_ERROR	§7.10	4
0x9	UNANNOUNCE	§7.23	2
0xA	UNSUBSCRIBE	§7.6	3
0xB	SUBSCRIBE_DONE	§7.19	8
0xC	ANNOUNCE_CANCEL	§7.11	2
0xD	TRACK_STATUS_REQUEST	§7.12	2
0xE	TRACK_STATUS	§7.24	6
0x10	GOAWAY	§7.3	4
0x11	SUBSCRIBE_ANNOUNCES	§7.13	3
0x12	SUBSCRIBE_ANNOUNCES_OK	§7.25	2
0x13	SUBSCRIBE_ANNOUNCES_ERROR	§7.26	3
0x14	UNSUBSCRIBE_ANNOUNCES	§7.14	2
0x15	MAX_SUBSCRIBE_ID	§7.20	3
0x1A	SUBSCRIBES_BLOCKED	§7.21	3
0x16	FETCH	§7.7	6
0x17	FETCH_CANCEL	§7.8	2
0x18	FETCH_OK	§7.17	3
0x19	FETCH_ERROR	§7.18	6
0x40	CLIENT_SETUP	§7.2	6
0x41	SERVER_SETUP	§7.2	3

26 rows from the Control Messages table of draft-08. The test-vector column counts the encode/decode vectors moqtap publishes for that type; it is a cross-check, not part of the registry.

Caution

One row of draft-08's Control Messages table has an unclosed parenthesis in the published document — 0x13. The name and section above were recovered from the row's cross-reference link. This is a defect in the draft's rendering, not in the code point.

Cross-check against the test-vector corpus

moqtap publishes 105 encode/decode vectors for draft-08 across 26 message types, and all three moqtap implementations validate against them. Comparing that corpus with the draft's table is an independent check on this page: all 26 assigned types have vectors.

Neither source has a message type the other lacks.

Where these numbers come from

The table is parsed from table-2 of draft-ietf-moq-transport-08, in the frozen rendering this site keeps at spec-sources/draft-08.html. That file hashes to a9e7a0c224112bff530d6c6027ae1ffbc16c2baae055a87e60de4a46a16e1b1e, which is the same source_sha256 the moqtap codec's committed registry extraction records for draft-08 — the two inputs are provably the same document.

Control message types are not an IANA registry in the drafts, so they are not part of the codec's registry extraction; the table id above is taken from that extraction's record of the tables it deliberately excluded, which is how this page finds the right table without guessing.

draft-08 error codes · Read draft-08 section by section

Control message types in other drafts

moqtap covers drafts 07 through 20.

• draft-20 — 25 types
• draft-19 — 24 types
• draft-18 — 24 types
• draft-17 — 23 types
• draft-16 — 27 types
• draft-15 — 26 types
• draft-14 — 33 types
• draft-13 — 33 types
• draft-12 — 32 types
• draft-11 — 29 types
• draft-10 — 26 types
• draft-09 — 26 types
• draft-08 — 26 types
• draft-07 — 25 types

All MoQT control message types, draft by draft · How control messages work