Temporary IANA Registry

QUIC implementers have started experimenting with QUIC extensions, and have a need for codepoints to do interop testing. To avoid collisions, please list your experimental codepoints below. This page will be deleted once the official IANA registry is operational.

QUIC Transport Parameters

Value	Parameter Name	Specification
0x00	original_destination_connection_id	quic-transport
0x01	max_idle_timeout	quic-transport
0x02	stateless_reset_token	quic-transport
0x03	max_udp_payload_size	quic-transport
0x04	initial_max_data	quic-transport
0x05	initial_max_stream_data_bidi_local	quic-transport
0x06	initial_max_stream_data_bidi_remote	quic-transport
0x07	initial_max_stream_data_uni	quic-transport
0x08	initial_max_streams_bidi	quic-transport
0x09	initial_max_streams_uni	quic-transport
0x0a	ack_delay_exponent	quic-transport
0x0b	max_ack_delay	quic-transport
0x0c	disable_active_migration	quic-transport
0x0d	preferred_address	quic-transport
0x0e	active_connection_id_limit	quic-transport
0x0f	initial_connection_id	quic-transport
0x10	retry_connection_id	quic-transport
0x1B	reserved for GREASE	quic-transport
0x20	max_datagram_frame_size	quic-datagram
0x3A	reserved for GREASE	quic-transport
0x40	max_sending_uniflow_id	quic-multipath
0x41	enable_multipath	multipath-quic
0x59	reserved for GREASE	quic-transport
0x1000	cibir_encoding	quic-cibir
0x1057	loss_bits	quic-lossbits
0x2ab2	grease_quic_bit	quic-bit-grease
0x173E	discard	Discard upon receipt
0x3127	Google_internal	Google-internal undocumented transport parameter
0x3128	Google_internal	Google-internal undocumented transport parameter
0x3129	Google_internal	Google-internal undocumented transport parameter
0x312A	Google_internal	Google-internal undocumented transport parameter
0x312B	Google_internal	Google-internal undocumented transport parameter
0x312C	Google_internal	Google-internal undocumented transport parameter
0x312D	Google_internal	Google-internal undocumented transport parameter
0x312E	Google_internal	Google-internal undocumented transport parameter
0x312F	Google_internal	Google-internal undocumented transport parameter
0x3130	Google_internal	Google-internal undocumented transport parameter
0x3131	Google_internal	Google-internal undocumented transport parameter
0x3132	Google_internal	Google-internal undocumented transport parameter
0x3133	Google_internal	Google-internal undocumented transport parameter
0x3134	Google_internal	Google-internal undocumented transport parameter
0x465A	Google_internal	Google-internal undocumented transport parameter
0x4751	Google_internal	Google-internal undocumented transport parameter
0x4752	Google_internal	Google-internal undocumented transport parameter
0x7157	enable_time_stamp (v0)	quic-ts
0x7158	enable_time_stamp (v1)	quic-ts
0x73DB	version_negotiation	quic-version-negotiation
0xBAAD	disable_1rtt_encryption	quic-disable-encryption
0xDE1A	min_ack_delay	quic-delayed-ack-00
0xFF02DE1A	min_ack_delay	quic-delayed-ack-02
0xFF03DE1A	min_ack_delay	quic-delayed-ack-02

QUIC Frame Types

Type Value	Frame Type Name	Specification
0x00	PADDING	quic-transport
0x01	PING	quic-transport
0x02 - 0x03	ACK	quic-transport
0x04	RESET_STREAM	quic-transport
0x05	STOP_SENDING	quic-transport
0x06	CRYPTO	quic-transport
0x07	NEW_TOKEN	quic-transport
0x08 - 0x0f	STREAM	quic-transport
0x10	MAX_DATA	quic-transport
0x11	MAX_STREAM_DATA	quic-transport
0x12 - 0x13	MAX_STREAMS	quic-transport
0x14	DATA_BLOCKED	quic-transport
0x15	STREAM_DATA_BLOCKED	quic-transport
0x16 - 0x17	STREAMS_BLOCKED	quic-transport
0x18	NEW_CONNECTION_ID	quic-transport
0x19	RETIRE_CONNECTION_ID	quic-transport
0x1a	PATH_CHALLENGE	quic-transport
0x1b	PATH_RESPONSE	quic-transport
0x1c - 0x1d	CONNECTION_CLOSE	quic-transport
0x1e	HANDSHAKE_DONE	quic-transport
0x22 - 0x23	ACK_MP	multipath-quic
0x24	QOE_CONTROL_SIGNALS	multipath-quic
0x2a	PATH_STATUS	multipath-quic
0x30 - 0x31	DATAGRAM	quic-datagram
0x40	MP_NEW_CONNECTION_ID	quic-multipath
0x41	MP_RETIRE_CONNECTION_ID	quic-multipath
0x42 - 0x43	MP_ACK	quic-multipath
0x44	ADD_ADDRESS	quic-multipath
0x45	REMOVE_ADDRESS	quic-multipath
0x46	UNIFLOWS	quic-multipath
0xAF	ACK_FREQUENCY	quic-delayed-ack
0x02F5	TIME_STAMP	quic-ts

QUIC Transport Error Codes

Value	Error	Description	Specification
0x0	NO_ERROR	No error	quic-transport
0x1	INTERNAL_ERROR	Implementation error	quic-transport
0x2	SERVER_BUSY	Server currently busy	quic-transport
0x3	FLOW_CONTROL_ERROR	Flow control error	quic-transport
0x4	STREAM_LIMIT_ERROR	Too many streams opened	quic-transport
0x5	STREAM_STATE_ERROR	Frame received in invalid stream state	quic-transport
0x6	FINAL_SIZE_ERROR	Change to final size	quic-transport
0x7	FRAME_ENCODING_ERROR	Frame encoding error	quic-transport
0x8	TRANSPORT_PARAMETER_ERROR	Error in transport parameters	quic-transport
0x9	CONNECTION_ID_LIMIT_ERROR	Too many connection IDs received	quic-transport
0xA	PROTOCOL_VIOLATION	Generic protocol violation	quic-transport
0xB	INVALID_TOKEN	Invalid Token Received	quic-transport
0xC	APPLICATION_ERROR	Application error	quic-transport
0xD	CRYPTO_BUFFER_EXCEEDED	CRYPTO data buffer overflowed	quic-transport
0xE	KEY_UPDATE_ERROR	Invalid packet protection update	quic-transport
0xF	AEAD_LIMIT_REACHED	Excessive use of packet protection keys	quic-transport
0x100-0x1ff	CRYPTO_ERROR	TLS error	quic-tls
0x53F8	VERSION_NEGOTIATION_ERROR	Version Negotiation Error	quic-version-negotiation

HTTP/3 Frame Types

Frame Type	Value	Specification
DATA	0x0	quic-http
HEADERS	0x1	quic-http
Reserved	0x2	quic-http
CANCEL_PUSH	0x3	quic-http
SETTINGS	0x4	quic-http
PUSH_PROMISE	0x5	quic-http
Reserved	0x6	quic-http
GOAWAY	0x7	quic-http
Reserved	0x8	quic-http
Reserved	0x9	quic-http
MAX_PUSH_ID	0xD	quic-http
DUPLICATE_PUSH	0xE	quic-http
PRIORITY_UPDATE	0xF	http-priorities
PRIORITY_UPDATE	0x10	http-priorities
WEBTRANSPORT_STREAM	0x41	webtransport-http3
ACCEPT_CH	0x89	http-client-hint-reliability
DATA_WITH_OFFSET	0xD00	quic-http-data-offset-frame
DATA_WITH_OFFSET	0xD0F	quic-http-data-offset-frame
PRIORITY_UPDATE	0xF0700	http-priorities
PRIORITY_UPDATE	0xF0701	http-priorities
PRIORITY_UPDATE	0x1CCB8BBF1F0700	http-priorities
PRIORITY_UPDATE	0x1CCB8BBF1F0701	http-priorities

HTTP/3 Settings Parameters

Setting Name	Value	Specification
QPACK_MAX_TABLE_CAPACITY	0x1	quic-qpack
Reserved	0x2	N/A
Reserved	0x3	N/A
Reserved	0x4	N/A
Reserved	0x5	N/A
MAX_HEADER_LIST_SIZE	0x6	quic-http
QPACK_BLOCKED_STREAMS	0x7	quic-qpack
H3_DATAGRAM	0x276	h3-datagram
ENABLE_DATA_WITH_OFFSET	0xD00	quic-http-data-offset-frame
ENABLE_DATA_WITH_OFFSET	0xD0F	quic-http-data-offset-frame
ENABLE_WEBTRANSPORT	0x2b603742	h3-webtransport

HTTP/3 Error Codes

Name	Value	Description	Specification
H3_NO_ERROR	0x0100	No error	quic-http
H3_GENERAL_PROTOCOL_ERROR	0x0101	General protocol error	quic-http
H3_INTERNAL_ERROR	0x0102	Internal error	quic-http
H3_STREAM_CREATION_ERROR	0x0103	Stream creation error	quic-http
H3_CLOSED_CRITICAL_STREAM	0x0104	Critical stream was closed	quic-http
H3_FRAME_UNEXPECTED	0x0105	Frame not permitted in the current state	quic-http
H3_FRAME_ERROR	0x0106	Frame violated layout or size rules	quic-http
H3_EXCESSIVE_LOAD	0x0107	Peer generating excessive load	quic-http
H3_ID_ERROR	0x0108	An identifier was used incorrectly	quic-http
H3_SETTINGS_ERROR	0x0109	SETTINGS frame contained invalid values	quic-http
H3_MISSING_SETTINGS	0x010A	No SETTINGS frame received	quic-http
H3_REQUEST_REJECTED	0x010B	Request not processed	quic-http
H3_REQUEST_CANCELLED	0x010C	Data no longer needed	quic-http
H3_REQUEST_INCOMPLETE	0x010D	Stream terminated early	quic-http
H3_CONNECT_ERROR	0x010F	TCP reset or error on CONNECT request	quic-http
H3_VERSION_FALLBACK	0x0110	Retry over HTTP/1.1	quic-http
QPACK_DECOMPRESSION_FAILED	0x200	Decompression of a header block failed	quic-qpack
QPACK_ENCODER_STREAM_ERROR	0x201	Error on the encoder stream	quic-qpack
QPACK_DECODER_STREAM_ERROR	0x202	Error on the decoder stream	quic-qpack

HTTP/3 Stream Types

Stream Type	Value	Specification
Control Stream	0x00	quic-http
Push Stream	0x01	quic-http
QPACK Encoder Stream	0x02	quic-qpack
QPACK Decoder Stream	0x03	quic-qpack
WebTransport Unidirectional Stream	0x54	webtransport-http3