draft-ietf-quic-http-06.txt		draft-ietf-quic-http-07.txt
	QUIC M. Bishop, Ed.		QUIC M. Bishop, Ed.
	Internet-Draft Microsoft		Internet-Draft Microsoft
	Intended status: Standards Track September 22, 2017		Intended status: Standards Track October 13, 2017
	Expires: March 26, 2018		Expires: April 16, 2018
	Hypertext Transfer Protocol (HTTP) over QUIC		Hypertext Transfer Protocol (HTTP) over QUIC
	draft-ietf-quic-http-06		draft-ietf-quic-http-07
	Abstract		Abstract
	The QUIC transport protocol has several features that are desirable		The QUIC transport protocol has several features that are desirable
	in a transport for HTTP, such as stream multiplexing, per-stream flow		in a transport for HTTP, such as stream multiplexing, per-stream flow
	control, and low-latency connection establishment. This document		control, and low-latency connection establishment. This document
	describes a mapping of HTTP semantics over QUIC. This document also		describes a mapping of HTTP semantics over QUIC. This document also
	identifies HTTP/2 features that are subsumed by QUIC, and describes		identifies HTTP/2 features that are subsumed by QUIC, and describes
	how HTTP/2 extensions can be ported to QUIC.		how HTTP/2 extensions can be ported to QUIC.
	Note to Readers		Note to Readers
	Discussion of this draft takes place on the QUIC working group		Discussion of this draft takes place on the QUIC working group
	mailing list (quic@ietf.org), which is archived at		mailing list (quic@ietf.org), which is archived at
	https://mailarchive.ietf.org/arch/search/?email_list=quic .		https://mailarchive.ietf.org/arch/search/?email_list=quic [1].
	Working Group information can be found at https://github.com/quicwg ;		Working Group information can be found at https://github.com/quicwg
	source code and issues list for this draft can be found at		[2]; source code and issues list for this draft can be found at
	https://github.com/quicwg/base-drafts/labels/http .		https://github.com/quicwg/base-drafts/labels/http [3].
	Status of This Memo		Status of This Memo
	This Internet-Draft is submitted in full conformance with the		This Internet-Draft is submitted in full conformance with the
	provisions of BCP 78 and BCP 79.		provisions of BCP 78 and BCP 79.
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF). Note that other groups may also distribute		Task Force (IETF). Note that other groups may also distribute
	working documents as Internet-Drafts. The list of current Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts is at http://datatracker.ietf.org/drafts/current/.		Drafts is at https://datatracker.ietf.org/drafts/current/.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
	time. It is inappropriate to use Internet-Drafts as reference		time. It is inappropriate to use Internet-Drafts as reference
	material or to cite them other than as "work in progress."		material or to cite them other than as "work in progress."
	This Internet-Draft will expire on March 26, 2018.		This Internet-Draft will expire on April 16, 2018.
	Copyright Notice		Copyright Notice
	Copyright (c) 2017 IETF Trust and the persons identified as the		Copyright (c) 2017 IETF Trust and the persons identified as the
	document authors. All rights reserved.		document authors. All rights reserved.
	This document is subject to BCP 78 and the IETF Trust's Legal		This document is subject to BCP 78 and the IETF Trust's Legal
	Provisions Relating to IETF Documents		Provisions Relating to IETF Documents
	(http://trustee.ietf.org/license-info) in effect on the date of		(https://trustee.ietf.org/license-info) in effect on the date of
	publication of this document. Please review these documents		publication of this document. Please review these documents
	carefully, as they describe your rights and restrictions with respect		carefully, as they describe your rights and restrictions with respect
	to this document. Code Components extracted from this document must		to this document. Code Components extracted from this document must
	include Simplified BSD License text as described in Section 4.e of		include Simplified BSD License text as described in Section 4.e of
	the Trust Legal Provisions and are provided without warranty as		the Trust Legal Provisions and are provided without warranty as
	described in the Simplified BSD License.		described in the Simplified BSD License.
	Table of Contents		Table of Contents
	1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3		1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
	1.1. Notational Conventions . . . . . . . . . . . . . . . . . 3		1.1. Notational Conventions . . . . . . . . . . . . . . . . . 3
	2. QUIC Advertisement . . . . . . . . . . . . . . . . . . . . . 3		2. QUIC Advertisement . . . . . . . . . . . . . . . . . . . . . 4
	2.1. QUIC Version Hints . . . . . . . . . . . . . . . . . . . 4		2.1. QUIC Version Hints . . . . . . . . . . . . . . . . . . . 4
	3. Connection Establishment . . . . . . . . . . . . . . . . . . 5		3. Connection Establishment . . . . . . . . . . . . . . . . . . 5
	3.1. Draft Version Identification . . . . . . . . . . . . . . 5		3.1. Draft Version Identification . . . . . . . . . . . . . . 5
	4. Stream Mapping and Usage . . . . . . . . . . . . . . . . . . 5		4. Stream Mapping and Usage . . . . . . . . . . . . . . . . . . 5
	4.1. Stream 1: Control Stream . . . . . . . . . . . . . . . . 6		4.1. Stream 1: Control Stream . . . . . . . . . . . . . . . . 6
	4.2. HTTP Message Exchanges . . . . . . . . . . . . . . . . . 6		4.2. HTTP Message Exchanges . . . . . . . . . . . . . . . . . 6
	4.2.1. Header Compression . . . . . . . . . . . . . . . . . 7		4.2.1. Header Compression . . . . . . . . . . . . . . . . . 7
	4.2.2. The CONNECT Method . . . . . . . . . . . . . . . . . 8		4.2.2. The CONNECT Method . . . . . . . . . . . . . . . . . 8
	4.3. Request Prioritization . . . . . . . . . . . . . . . . . 9		4.3. Request Prioritization . . . . . . . . . . . . . . . . . 9
	4.4. Server Push . . . . . . . . . . . . . . . . . . . . . . . 9		4.4. Server Push . . . . . . . . . . . . . . . . . . . . . . . 9
	5. HTTP Framing Layer . . . . . . . . . . . . . . . . . . . . . 10		5. HTTP Framing Layer . . . . . . . . . . . . . . . . . . . . . 10
	5.1. Frame Layout . . . . . . . . . . . . . . . . . . . . . . 10		5.1. Frame Layout . . . . . . . . . . . . . . . . . . . . . . 11
	5.2. Frame Definitions . . . . . . . . . . . . . . . . . . . . 11		5.2. Frame Definitions . . . . . . . . . . . . . . . . . . . . 11
	5.2.1. DATA . . . . . . . . . . . . . . . . . . . . . . . . 11		5.2.1. DATA . . . . . . . . . . . . . . . . . . . . . . . . 11
	5.2.2. HEADERS . . . . . . . . . . . . . . . . . . . . . . . 11		5.2.2. HEADERS . . . . . . . . . . . . . . . . . . . . . . . 11
	5.2.3. PRIORITY . . . . . . . . . . . . . . . . . . . . . . 12		5.2.3. PRIORITY . . . . . . . . . . . . . . . . . . . . . . 12
	5.2.4. CANCEL_PUSH . . . . . . . . . . . . . . . . . . . . . 13		5.2.4. CANCEL_PUSH . . . . . . . . . . . . . . . . . . . . . 13
	5.2.5. SETTINGS . . . . . . . . . . . . . . . . . . . . . . 14		5.2.5. SETTINGS . . . . . . . . . . . . . . . . . . . . . . 14
	5.2.6. PUSH_PROMISE . . . . . . . . . . . . . . . . . . . . 17		5.2.6. PUSH_PROMISE . . . . . . . . . . . . . . . . . . . . 17
	5.2.7. GOAWAY . . . . . . . . . . . . . . . . . . . . . . . 18		5.2.7. GOAWAY . . . . . . . . . . . . . . . . . . . . . . . 18
	5.2.8. MAX_PUSH_ID . . . . . . . . . . . . . . . . . . . . . 20		5.2.8. MAX_PUSH_ID . . . . . . . . . . . . . . . . . . . . . 20
	6. Connection Management . . . . . . . . . . . . . . . . . . . . 20		6. Connection Management . . . . . . . . . . . . . . . . . . . . 20
	7. Error Handling . . . . . . . . . . . . . . . . . . . . . . . 21		7. Error Handling . . . . . . . . . . . . . . . . . . . . . . . 21
	7.1. HTTP-Defined QUIC Error Codes . . . . . . . . . . . . . . 21		7.1. HTTP/QUIC Error Codes . . . . . . . . . . . . . . . . . . 21
	8. Considerations for Transitioning from HTTP/2 . . . . . . . . 22		8. Considerations for Transitioning from HTTP/2 . . . . . . . . 22
	8.1. HTTP Frame Types . . . . . . . . . . . . . . . . . . . . 23		8.1. HTTP Frame Types . . . . . . . . . . . . . . . . . . . . 23
	8.2. HTTP/2 SETTINGS Parameters . . . . . . . . . . . . . . . 24		8.2. HTTP/2 SETTINGS Parameters . . . . . . . . . . . . . . . 25
	8.3. HTTP/2 Error Codes . . . . . . . . . . . . . . . . . . . 25		8.3. HTTP/2 Error Codes . . . . . . . . . . . . . . . . . . . 25
	9. Security Considerations . . . . . . . . . . . . . . . . . . . 26		9. Security Considerations . . . . . . . . . . . . . . . . . . . 26
	10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26		10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 27
	10.1. Registration of HTTP/QUIC Identification String . . . . 26		10.1. Registration of HTTP/QUIC Identification String . . . . 27
	10.2. Registration of QUIC Version Hint Alt-Svc Parameter . . 27		10.2. Registration of QUIC Version Hint Alt-Svc Parameter . . 27
	10.3. Frame Types . . . . . . . . . . . . . . . . . . . . . . 27		10.3. Frame Types . . . . . . . . . . . . . . . . . . . . . . 27
	10.4. Settings Parameters . . . . . . . . . . . . . . . . . . 28		10.4. Settings Parameters . . . . . . . . . . . . . . . . . . 28
	10.5. Error Codes . . . . . . . . . . . . . . . . . . . . . . 29		10.5. Error Codes . . . . . . . . . . . . . . . . . . . . . . 29
	11. References . . . . . . . . . . . . . . . . . . . . . . . . . 31		11. References . . . . . . . . . . . . . . . . . . . . . . . . . 32
	11.1. Normative References . . . . . . . . . . . . . . . . . . 31		11.1. Normative References . . . . . . . . . . . . . . . . . . 32
	11.2. Informative References . . . . . . . . . . . . . . . . . 32		11.2. Informative References . . . . . . . . . . . . . . . . . 33
	Appendix A. Contributors . . . . . . . . . . . . . . . . . . . . 32		11.3. URIs . . . . . . . . . . . . . . . . . . . . . . . . . . 33
			Appendix A. Contributors . . . . . . . . . . . . . . . . . . . . 33
	Appendix B. Change Log . . . . . . . . . . . . . . . . . . . . . 33		Appendix B. Change Log . . . . . . . . . . . . . . . . . . . . . 33
	B.1. Since draft-ietf-quic-http-05 . . . . . . . . . . . . . . 33		B.1. Since draft-ietf-quic-http-06 . . . . . . . . . . . . . . 33
	B.2. Since draft-ietf-quic-http-04 . . . . . . . . . . . . . . 33		B.2. Since draft-ietf-quic-http-05 . . . . . . . . . . . . . . 33
	B.3. Since draft-ietf-quic-http-03 . . . . . . . . . . . . . . 33		B.3. Since draft-ietf-quic-http-04 . . . . . . . . . . . . . . 33
	B.4. Since draft-ietf-quic-http-02 . . . . . . . . . . . . . . 33		B.4. Since draft-ietf-quic-http-03 . . . . . . . . . . . . . . 34
	B.5. Since draft-ietf-quic-http-01 . . . . . . . . . . . . . . 33		B.5. Since draft-ietf-quic-http-02 . . . . . . . . . . . . . . 34
	B.6. Since draft-ietf-quic-http-00 . . . . . . . . . . . . . . 34		B.6. Since draft-ietf-quic-http-01 . . . . . . . . . . . . . . 34
	B.7. Since draft-shade-quic-http2-mapping-00 . . . . . . . . . 34		B.7. Since draft-ietf-quic-http-00 . . . . . . . . . . . . . . 35
	Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 34		B.8. Since draft-shade-quic-http2-mapping-00 . . . . . . . . . 35
			Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 35
	1. Introduction		1. Introduction
	The QUIC transport protocol has several features that are desirable		The QUIC transport protocol has several features that are desirable
	in a transport for HTTP, such as stream multiplexing, per-stream flow		in a transport for HTTP, such as stream multiplexing, per-stream flow
	control, and low-latency connection establishment. This document		control, and low-latency connection establishment. This document
	describes a mapping of HTTP semantics over QUIC, drawing heavily on		describes a mapping of HTTP semantics over QUIC, drawing heavily on
	the existing TCP mapping, HTTP/2. Specifically, this document		the existing TCP mapping, HTTP/2. Specifically, this document
	identifies HTTP/2 features that are subsumed by QUIC, and describes		identifies HTTP/2 features that are subsumed by QUIC, and describes
	how the other features can be implemented atop QUIC.		how the other features can be implemented atop QUIC.
	skipping to change at page 21, line 26 ¶		skipping to change at page 21, line 26 ¶
	7. Error Handling		7. Error Handling
	QUIC allows the application to abruptly terminate (reset) individual		QUIC allows the application to abruptly terminate (reset) individual
	streams or the entire connection when an error is encountered. These		streams or the entire connection when an error is encountered. These
	are referred to as "stream errors" or "connection errors" and are		are referred to as "stream errors" or "connection errors" and are
	described in more detail in [QUIC-TRANSPORT].		described in more detail in [QUIC-TRANSPORT].
	This section describes HTTP-specific error codes which can be used to		This section describes HTTP-specific error codes which can be used to
	express the cause of a connection or stream error.		express the cause of a connection or stream error.
	7.1. HTTP-Defined QUIC Error Codes		7.1. HTTP/QUIC Error Codes
	QUIC allocates error codes 0x0000-0x3FFF to application protocol		The following error codes are defined for use in QUIC RST_STREAM,
	definition. The following error codes are defined by HTTP for use in		STOP_SENDING, and CONNECTION_CLOSE frames when using HTTP/QUIC.
	QUIC RST_STREAM and CONNECTION_CLOSE frames.
	HTTP_PUSH_REFUSED (0x01): The server has attempted to push content		STOPPING (0x00): This value is reserved by the transport to be used
			in response to QUIC STOP_SENDING frames.
			HTTP_NO_ERROR (0x01): No error. This is used when the connection or
			stream needs to be closed, but there is no error to signal.
			HTTP_PUSH_REFUSED (0x02): The server has attempted to push content
	which the client will not accept on this connection.		which the client will not accept on this connection.
	HTTP_INTERNAL_ERROR (0x02): An internal error has occurred in the		HTTP_INTERNAL_ERROR (0x03): An internal error has occurred in the
	HTTP stack.		HTTP stack.
	HTTP_PUSH_ALREADY_IN_CACHE (0x03): The server has attempted to push		HTTP_PUSH_ALREADY_IN_CACHE (0x04): The server has attempted to push
	content which the client has cached.		content which the client has cached.
	HTTP_REQUEST_CANCELLED (0x04): The client no longer needs the		HTTP_REQUEST_CANCELLED (0x05): The client no longer needs the
	requested data.		requested data.
	HTTP_HPACK_DECOMPRESSION_FAILED (0x05): HPACK failed to decompress a		HTTP_HPACK_DECOMPRESSION_FAILED (0x06): HPACK failed to decompress a
	frame and cannot continue.		frame and cannot continue.
	HTTP_CONNECT_ERROR (0x06): The connection established in response to		HTTP_CONNECT_ERROR (0x07): The connection established in response to
	a CONNECT request was reset or abnormally closed.		a CONNECT request was reset or abnormally closed.
	HTTP_EXCESSIVE_LOAD (0x07): The endpoint detected that its peer is		HTTP_EXCESSIVE_LOAD (0x08): The endpoint detected that its peer is
	exhibiting a behavior that might be generating excessive load.		exhibiting a behavior that might be generating excessive load.
	HTTP_VERSION_FALLBACK (0x08): The requested operation cannot be		HTTP_VERSION_FALLBACK (0x09): The requested operation cannot be
	served over HTTP/QUIC. The peer should retry over HTTP/2.		served over HTTP/QUIC. The peer should retry over HTTP/2.
	HTTP_MALFORMED_HEADERS (0x09): A HEADERS frame has been received		HTTP_MALFORMED_HEADERS (0x0A): A HEADERS frame has been received
	with an invalid format.		with an invalid format.
	HTTP_MALFORMED_PRIORITY (0x0A): A PRIORITY frame has been received		HTTP_MALFORMED_PRIORITY (0x0B): A PRIORITY frame has been received
	with an invalid format.		with an invalid format.
	HTTP_MALFORMED_SETTINGS (0x0B): A SETTINGS frame has been received		HTTP_MALFORMED_SETTINGS (0x0C): A SETTINGS frame has been received
	with an invalid format.		with an invalid format.
	HTTP_MALFORMED_PUSH_PROMISE (0x0C): A PUSH_PROMISE frame has been		HTTP_MALFORMED_PUSH_PROMISE (0x0D): A PUSH_PROMISE frame has been
	received with an invalid format.		received with an invalid format.
	HTTP_MALFORMED_DATA (0x0D): A DATA frame has been received with an		HTTP_MALFORMED_DATA (0x0E): A DATA frame has been received with an
	invalid format.		invalid format.
	HTTP_INTERRUPTED_HEADERS (0x0E): A HEADERS frame without the End		HTTP_INTERRUPTED_HEADERS (0x0F): A HEADERS frame without the End
	Header Block flag was followed by a frame other than HEADERS.		Header Block flag was followed by a frame other than HEADERS.
	HTTP_WRONG_STREAM (0x0F): A frame was received on stream where it is		HTTP_WRONG_STREAM (0x10): A frame was received on stream where it is
	not permitted.		not permitted.
	HTTP_MULTIPLE_SETTINGS (0x10): More than one SETTINGS frame was		HTTP_MULTIPLE_SETTINGS (0x11): More than one SETTINGS frame was
	received.		received.
	HTTP_MALFORMED_PUSH (0x11): A push stream header was malformed or		HTTP_MALFORMED_PUSH (0x12): A push stream header was malformed or
	included an invalid Push ID.		included an invalid Push ID.
	HTTP_MALFORMED_MAX_PUSH_ID (0x12): A MAX_PUSH_ID frame has been		HTTP_MALFORMED_MAX_PUSH_ID (0x13): A MAX_PUSH_ID frame has been
	received with an invalid format.		received with an invalid format.
	8. Considerations for Transitioning from HTTP/2		8. Considerations for Transitioning from HTTP/2
	HTTP/QUIC is strongly informed by HTTP/2, and bears many		HTTP/QUIC is strongly informed by HTTP/2, and bears many
	similarities. This section describes the approach taken to design		similarities. This section describes the approach taken to design
	HTTP/QUIC, points out important differences from HTTP/2, and		HTTP/QUIC, points out important differences from HTTP/2, and
	describes how to map HTTP/2 extensions into HTTP/QUIC.		describes how to map HTTP/2 extensions into HTTP/QUIC.
	HTTP/QUIC begins from the premise that HTTP/2 code reuse is a useful		HTTP/QUIC begins from the premise that HTTP/2 code reuse is a useful
	skipping to change at page 25, line 35 ¶		skipping to change at page 25, line 48 ¶
	IDs of settings defined in [RFC7540] have been reserved for		IDs of settings defined in [RFC7540] have been reserved for
	simplicity. See Section 10.4.		simplicity. See Section 10.4.
	8.3. HTTP/2 Error Codes		8.3. HTTP/2 Error Codes
	QUIC has the same concepts of "stream" and "connection" errors that		QUIC has the same concepts of "stream" and "connection" errors that
	HTTP/2 provides. However, because the error code space is shared		HTTP/2 provides. However, because the error code space is shared
	between multiple components, there is no direct portability of HTTP/2		between multiple components, there is no direct portability of HTTP/2
	error codes.		error codes.
	The HTTP/2 error codes defined in Section 7 of [RFC7540] map to QUIC		The HTTP/2 error codes defined in Section 7 of [RFC7540] map to the
	error codes as follows:		HTTP over QUIC error codes as follows:
	NO_ERROR (0x0): QUIC_NO_ERROR		NO_ERROR (0x0): HTTP_NO_ERROR in Section 7.1.
	PROTOCOL_ERROR (0x1): No single mapping. See new HTTP_MALFORMED_*		PROTOCOL_ERROR (0x1): No single mapping. See new HTTP_MALFORMED_*
	error codes defined in Section 7.1.		error codes defined in Section 7.1.
	INTERNAL_ERROR (0x2): HTTP_INTERNAL_ERROR in Section 7.1.		INTERNAL_ERROR (0x2): HTTP_INTERNAL_ERROR in Section 7.1.
	FLOW_CONTROL_ERROR (0x3): Not applicable, since QUIC handles flow		FLOW_CONTROL_ERROR (0x3): Not applicable, since QUIC handles flow
	control. Would provoke a QUIC_FLOW_CONTROL_RECEIVED_TOO_MUCH_DATA		control. Would provoke a QUIC_FLOW_CONTROL_RECEIVED_TOO_MUCH_DATA
	from the QUIC layer.		from the QUIC layer.
	skipping to change at page 27, line 26 ¶		skipping to change at page 27, line 38 ¶
	Parameter: "quic"		Parameter: "quic"
	Specification: This document, Section 2.1		Specification: This document, Section 2.1
	10.3. Frame Types		10.3. Frame Types
	This document establishes a registry for HTTP/QUIC frame type codes.		This document establishes a registry for HTTP/QUIC frame type codes.
	The "HTTP/QUIC Frame Type" registry manages an 8-bit space. The		The "HTTP/QUIC Frame Type" registry manages an 8-bit space. The
	"HTTP/QUIC Frame Type" registry operates under either of the "IETF		"HTTP/QUIC Frame Type" registry operates under either of the "IETF
	Review" or "IESG Approval" policies [RFC5226] for values between 0x00		Review" or "IESG Approval" policies [RFC8126] for values between 0x00
	and 0xef, with values between 0xf0 and 0xff being reserved for		and 0xef, with values between 0xf0 and 0xff being reserved for
	Experimental Use.		Experimental Use.
	While this registry is separate from the "HTTP/2 Frame Type" registry		While this registry is separate from the "HTTP/2 Frame Type" registry
	defined in [RFC7540], it is preferable that the assignments parallel		defined in [RFC7540], it is preferable that the assignments parallel
	each other. If an entry is present in only one registry, every		each other. If an entry is present in only one registry, every
	effort SHOULD be made to avoid assigning the corresponding value to		effort SHOULD be made to avoid assigning the corresponding value to
	an unrelated operation.		an unrelated operation.
	New entries in this registry require the following information:		New entries in this registry require the following information:
	skipping to change at page 28, line 36 ¶		skipping to change at page 28, line 45 ¶
	| Reserved | 0x9 | N/A |		| Reserved | 0x9 | N/A |
	| | | |		| | | |
	| MAX_PUSH_ID | 0xD | Section 5.2.8 |		| MAX_PUSH_ID | 0xD | Section 5.2.8 |
	+--------------+------+---------------+		+--------------+------+---------------+
	10.4. Settings Parameters		10.4. Settings Parameters
	This document establishes a registry for HTTP/QUIC settings. The		This document establishes a registry for HTTP/QUIC settings. The
	"HTTP/QUIC Settings" registry manages a 16-bit space. The "HTTP/QUIC		"HTTP/QUIC Settings" registry manages a 16-bit space. The "HTTP/QUIC
	Settings" registry operates under the "Expert Review" policy		Settings" registry operates under the "Expert Review" policy
	[RFC5226] for values in the range from 0x0000 to 0xefff, with values		[RFC8126] for values in the range from 0x0000 to 0xefff, with values
	between and 0xf000 and 0xffff being reserved for Experimental Use.		between and 0xf000 and 0xffff being reserved for Experimental Use.
	The designated experts are the same as those for the "HTTP/2		The designated experts are the same as those for the "HTTP/2
	Settings" registry defined in [RFC7540].		Settings" registry defined in [RFC7540].
	While this registry is separate from the "HTTP/2 Settings" registry		While this registry is separate from the "HTTP/2 Settings" registry
	defined in [RFC7540], it is preferable that the assignments parallel		defined in [RFC7540], it is preferable that the assignments parallel
	each other. If an entry is present in only one registry, every		each other. If an entry is present in only one registry, every
	effort SHOULD be made to avoid assigning the corresponding value to		effort SHOULD be made to avoid assigning the corresponding value to
	an unrelated operation.		an unrelated operation.
	skipping to change at page 29, line 29 ¶		skipping to change at page 29, line 38 ¶
	| Reserved | 0x4 | N/A |		| Reserved | 0x4 | N/A |
	| | | |		| | | |
	| Reserved | 0x5 | N/A |		| Reserved | 0x5 | N/A |
	| | | |		| | | |
	| MAX_HEADER_LIST_SIZE | 0x6 | Section 5.2.5.2 |		| MAX_HEADER_LIST_SIZE | 0x6 | Section 5.2.5.2 |
	+----------------------+------+-----------------+		+----------------------+------+-----------------+
	10.5. Error Codes		10.5. Error Codes
	This document establishes a registry for HTTP/QUIC error codes. The		This document establishes a registry for HTTP/QUIC error codes. The
	"HTTP/QUIC Error Code" registry manages a 30-bit space. The "HTTP/		"HTTP/QUIC Error Code" registry manages a 16-bit space. The "HTTP/
	QUIC Error Code" registry operates under the "Expert Review" policy		QUIC Error Code" registry operates under the "Expert Review" policy
	[RFC5226].		[RFC8126].
	Registrations for error codes are required to include a description		Registrations for error codes are required to include a description
	of the error code. An expert reviewer is advised to examine new		of the error code. An expert reviewer is advised to examine new
	registrations for possible duplication with existing error codes.		registrations for possible duplication with existing error codes.
	Use of existing registrations is to be encouraged, but not mandated.		Use of existing registrations is to be encouraged, but not mandated.
	New registrations are advised to provide the following information:		New registrations are advised to provide the following information:
	Name: A name for the error code. Specifying an error code name is		Name: A name for the error code. Specifying an error code name is
	optional.		optional.
	Code: The 30-bit error code value.		Code: The 16-bit error code value.
	Description: A brief description of the error code semantics, longer		Description: A brief description of the error code semantics, longer
	if no detailed specification is provided.		if no detailed specification is provided.
	Specification: An optional reference for a specification that		Specification: An optional reference for a specification that
	defines the error code.		defines the error code.
	The entries in the following table are registered by this document.		The entries in the following table are registered by this document.
	+------------------------------+-----+--------------+---------------+		+-----------------------------+-----+-------------+-----------------+
	| Name | Cod | Description | Specification |		| Name | Cod | Description | Specification |
	| | e | | |		| | e | | |
	+------------------------------+-----+--------------+---------------+		+-----------------------------+-----+-------------+-----------------+
	| HTTP_PUSH_REFUSED | 0x0 | Client | Section 7.1 |		| STOPPING | 0x0 | Reserved by | [QUIC-TRANSPORT |
	| | 1 | refused | |		| | 0 | QUIC | ] |
	| | | pushed | |		| | | | |
	| | | content | |		| HTTP_NO_ERROR | 0x0 | No error | Section 7.1 |
	| | | | |		| | 1 | | |
	| HTTP_INTERNAL_ERROR | 0x0 | Internal | Section 7.1 |		| | | | |
	| | 2 | error | |		| HTTP_PUSH_REFUSED | 0x0 | Client | Section 7.1 |
	| | | | |		| | 2 | refused | |
	| HTTP_PUSH_ALREADY_IN_CACHE | 0x0 | Pushed | Section 7.1 |		| | | pushed | |
	| | 3 | content | |		| | | content | |
	| | | already | |		| | | | |
	| | | cached | |		| HTTP_INTERNAL_ERROR | 0x0 | Internal | Section 7.1 |
	| | | | |		| | 3 | error | |
	| HTTP_REQUEST_CANCELLED | 0x0 | Data no | Section 7.1 |		| | | | |
	| | 4 | longer | |		| HTTP_PUSH_ALREADY_IN_CACHE | 0x0 | Pushed | Section 7.1 |
	| | | needed | |		| | 4 | content | |
	| | | | |		| | | already | |
	| HTTP_HPACK_DECOMPRESSION_FAI | 0x0 | HPACK cannot | Section 7.1 |		| | | cached | |
	| LED | 5 | continue | |		| | | | |
	| | | | |		| HTTP_REQUEST_CANCELLED | 0x0 | Data no | Section 7.1 |
	| HTTP_CONNECT_ERROR | 0x0 | TCP reset or | Section 7.1 |		| | 5 | longer | |
	| | 6 | error on | |		| | | needed | |
	| | | CONNECT | |		| | | | |
	| | | request | |		| HTTP_HPACK_DECOMPRESSION_FA | 0x0 | HPACK | Section 7.1 |
	| | | | |		| ILED | 6 | cannot | |
	| HTTP_EXCESSIVE_LOAD | 0x0 | Peer | Section 7.1 |		| | | continue | |
	| | 7 | generating | |		| | | | |
	| | | excessive | |		| HTTP_CONNECT_ERROR | 0x0 | TCP reset | Section 7.1 |
	| | | load | |		| | 7 | or error on | |
	| | | | |		| | | CONNECT | |
	| HTTP_VERSION_FALLBACK | 0x0 | Retry over | Section 7.1 |		| | | request | |
	| | 8 | HTTP/2 | |		| | | | |
	| | | | |		| HTTP_EXCESSIVE_LOAD | 0x0 | Peer | Section 7.1 |
	| HTTP_MALFORMED_HEADERS | 0x0 | Invalid | Section 7.1 |		| | 8 | generating | |
	| | 9 | HEADERS | |		| | | excessive | |
	| | | frame | |		| | | load | |
	| | | | |		| | | | |
	| HTTP_MALFORMED_PRIORITY | 0x0 | Invalid | Section 7.1 |		| HTTP_VERSION_FALLBACK | 0x0 | Retry over | Section 7.1 |
	| | A | PRIORITY | |		| | 9 | HTTP/2 | |
	| | | frame | |		| | | | |
	| | | | |		| HTTP_MALFORMED_HEADERS | 0x0 | Invalid | Section 7.1 |
	| HTTP_MALFORMED_SETTINGS | 0x0 | Invalid | Section 7.1 |		| | A | HEADERS | |
	| | B | SETTINGS | |		| | | frame | |
	| | | frame | |		| | | | |
	| | | | |		| HTTP_MALFORMED_PRIORITY | 0x0 | Invalid | Section 7.1 |
	| HTTP_MALFORMED_PUSH_PROMISE | 0x0 | Invalid | Section 7.1 |		| | B | PRIORITY | |
	| | C | PUSH_PROMISE | |		| | | frame | |
	| | | frame | |		| | | | |
	| | | | |		| HTTP_MALFORMED_SETTINGS | 0x0 | Invalid | Section 7.1 |
	| HTTP_MALFORMED_DATA | 0x0 | Invalid DATA | Section 7.1 |		| | C | SETTINGS | |
	| | D | frame | |		| | | frame | |
	| | | | |		| | | | |
	| HTTP_INTERRUPTED_HEADERS | 0x0 | Incomplete | Section 7.1 |		| HTTP_MALFORMED_PUSH_PROMISE | 0x0 | Invalid PUS | Section 7.1 |
	| | E | HEADERS | |		| | D | H_PROMISE | |
	| | | block | |		| | | frame | |
	| | | | |		| | | | |
	| HTTP_WRONG_STREAM | 0x0 | A frame was | Section 7.1 |		| HTTP_MALFORMED_DATA | 0x0 | Invalid | Section 7.1 |
	| | F | sent on the | |		| | E | DATA frame | |
	| | | wrong stream | |		| | | | |
	| | | | |		| HTTP_INTERRUPTED_HEADERS | 0x0 | Incomplete | Section 7.1 |
	| HTTP_MULTIPLE_SETTINGS | 0x1 | Multiple | Section 7.1 |		| | F | HEADERS | |
	| | 0 | SETTINGS | |		| | | block | |
	| | | frames | |		| | | | |
	| | | | |		| HTTP_WRONG_STREAM | 0x1 | A frame was | Section 7.1 |
	| HTTP_MALFORMED_PUSH | 0x1 | Invalid push | Section 7.1 |		| | 0 | sent on the | |
	| | 1 | stream | |		| | | wrong | |
	| | | header | |		| | | stream | |
	| | | | |		| | | | |
	| HTTP_MALFORMED_MAX_PUSH_ID | 0x1 | Invalid | Section 7.1 |		| HTTP_MULTIPLE_SETTINGS | 0x1 | Multiple | Section 7.1 |
	| | 2 | MAX_PUSH_ID | |		| | 1 | SETTINGS | |
	| | | frame | |		| | | frames | |
	+------------------------------+-----+--------------+---------------+		| | | | |
			| HTTP_MALFORMED_PUSH | 0x1 | Invalid | Section 7.1 |
			| | 2 | push stream | |
			| | | header | |
			| | | | |
			| HTTP_MALFORMED_MAX_PUSH_ID | 0x1 | Invalid | Section 7.1 |
			| | 3 | MAX_PUSH_ID | |
			| | | frame | |
			+-----------------------------+-----+-------------+-----------------+
	11. References		11. References
	11.1. Normative References		11.1. Normative References
	[QUIC-TRANSPORT]		[QUIC-TRANSPORT]
	Iyengar, J., Ed. and M. Thomson, Ed., "QUIC: A UDP-Based		Iyengar, J., Ed. and M. Thomson, Ed., "QUIC: A UDP-Based
	Multiplexed and Secure Transport", draft-ietf-quic-		Multiplexed and Secure Transport", draft-ietf-quic-
	transport (work in progress), September 2017.		transport-07 (work in progress), October 2017.
	[RFC0793] Postel, J., "Transmission Control Protocol", STD 7,		[RFC0793] Postel, J., "Transmission Control Protocol", STD 7,
	RFC 793, DOI 10.17487/RFC0793, September 1981,		RFC 793, DOI 10.17487/RFC0793, September 1981,
	<https://www.rfc-editor.org/info/rfc793>.		<https://www.rfc-editor.org/info/rfc793>.
	[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate		[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
	Requirement Levels", BCP 14, RFC 2119,		Requirement Levels", BCP 14, RFC 2119,
	DOI 10.17487/RFC2119, March 1997, <https://www.rfc-		DOI 10.17487/RFC2119, March 1997,
	editor.org/info/rfc2119>.		<https://www.rfc-editor.org/info/rfc2119>.
	[RFC5234] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax		[RFC5234] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax
	Specifications: ABNF", STD 68, RFC 5234,		Specifications: ABNF", STD 68, RFC 5234,
	DOI 10.17487/RFC5234, January 2008, <https://www.rfc-		DOI 10.17487/RFC5234, January 2008,
	editor.org/info/rfc5234>.		<https://www.rfc-editor.org/info/rfc5234>.
	[RFC7230] Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer		[RFC7230] Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer
	Protocol (HTTP/1.1): Message Syntax and Routing",		Protocol (HTTP/1.1): Message Syntax and Routing",
	RFC 7230, DOI 10.17487/RFC7230, June 2014,		RFC 7230, DOI 10.17487/RFC7230, June 2014,
	<https://www.rfc-editor.org/info/rfc7230>.		<https://www.rfc-editor.org/info/rfc7230>.
	[RFC7231] Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer		[RFC7231] Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer
	Protocol (HTTP/1.1): Semantics and Content", RFC 7231,		Protocol (HTTP/1.1): Semantics and Content", RFC 7231,
	DOI 10.17487/RFC7231, June 2014, <https://www.rfc-		DOI 10.17487/RFC7231, June 2014,
	editor.org/info/rfc7231>.		<https://www.rfc-editor.org/info/rfc7231>.
	[RFC7540] Belshe, M., Peon, R., and M. Thomson, Ed., "Hypertext		[RFC7540] Belshe, M., Peon, R., and M. Thomson, Ed., "Hypertext
	Transfer Protocol Version 2 (HTTP/2)", RFC 7540,		Transfer Protocol Version 2 (HTTP/2)", RFC 7540,
	DOI 10.17487/RFC7540, May 2015, <https://www.rfc-		DOI 10.17487/RFC7540, May 2015,
	editor.org/info/rfc7540>.		<https://www.rfc-editor.org/info/rfc7540>.
	[RFC7541] Peon, R. and H. Ruellan, "HPACK: Header Compression for		[RFC7541] Peon, R. and H. Ruellan, "HPACK: Header Compression for
	HTTP/2", RFC 7541, DOI 10.17487/RFC7541, May 2015,		HTTP/2", RFC 7541, DOI 10.17487/RFC7541, May 2015,
	<https://www.rfc-editor.org/info/rfc7541>.		<https://www.rfc-editor.org/info/rfc7541>.
	[RFC7838] Nottingham, M., McManus, P., and J. Reschke, "HTTP		[RFC7838] Nottingham, M., McManus, P., and J. Reschke, "HTTP
	Alternative Services", RFC 7838, DOI 10.17487/RFC7838,		Alternative Services", RFC 7838, DOI 10.17487/RFC7838,
	April 2016, <https://www.rfc-editor.org/info/rfc7838>.		April 2016, <https://www.rfc-editor.org/info/rfc7838>.
	11.2. Informative References		11.2. Informative References
	[RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an
	IANA Considerations Section in RFCs", RFC 5226,
	DOI 10.17487/RFC5226, May 2008, <https://www.rfc-
	editor.org/info/rfc5226>.
	[RFC7301] Friedl, S., Popov, A., Langley, A., and E. Stephan,		[RFC7301] Friedl, S., Popov, A., Langley, A., and E. Stephan,
	"Transport Layer Security (TLS) Application-Layer Protocol		"Transport Layer Security (TLS) Application-Layer Protocol
	Negotiation Extension", RFC 7301, DOI 10.17487/RFC7301,		Negotiation Extension", RFC 7301, DOI 10.17487/RFC7301,
	July 2014, <https://www.rfc-editor.org/info/rfc7301>.		July 2014, <https://www.rfc-editor.org/info/rfc7301>.
			[RFC8126] Cotton, M., Leiba, B., and T. Narten, "Guidelines for
			Writing an IANA Considerations Section in RFCs", BCP 26,
			RFC 8126, DOI 10.17487/RFC8126, June 2017,
			<https://www.rfc-editor.org/info/rfc8126>.
			11.3. URIs
			[1] https://mailarchive.ietf.org/arch/search/?email_list=quic
			[2] https://github.com/quicwg
			[3] https://github.com/quicwg/base-drafts/labels/http
	Appendix A. Contributors		Appendix A. Contributors
	The original authors of this specification were Robbie Shade and Mike		The original authors of this specification were Robbie Shade and Mike
	Warres.		Warres.
	Appendix B. Change Log		Appendix B. Change Log
	*RFC Editor's Note:* Please remove this section prior to		*RFC Editor's Note:* Please remove this section prior to
	publication of a final version of this document.		publication of a final version of this document.
	B.1. Since draft-ietf-quic-http-05		B.1. Since draft-ietf-quic-http-06
			Nothing yet.
			B.2. Since draft-ietf-quic-http-05
	o Made push ID sequential, add MAX_PUSH_ID, remove		o Made push ID sequential, add MAX_PUSH_ID, remove
	SETTINGS_ENABLE_PUSH (#709)		SETTINGS_ENABLE_PUSH (#709)
	o Guidance about keep-alive and QUIC PINGs (#729)		o Guidance about keep-alive and QUIC PINGs (#729)
	o Expanded text on GOAWAY and cancellation (#757)		o Expanded text on GOAWAY and cancellation (#757)
	B.2. Since draft-ietf-quic-http-04		B.3. Since draft-ietf-quic-http-04
	o Cite RFC 5234 (#404)		o Cite RFC 5234 (#404)
	o Return to a single stream per request (#245,#557)		o Return to a single stream per request (#245,#557)
	o Use separate frame type and settings registries from HTTP/2 (#81)		o Use separate frame type and settings registries from HTTP/2 (#81)
	o SETTINGS_ENABLE_PUSH instead of SETTINGS_DISABLE_PUSH (#477)		o SETTINGS_ENABLE_PUSH instead of SETTINGS_DISABLE_PUSH (#477)
	o Restored GOAWAY (#696)		o Restored GOAWAY (#696)
	o Identify server push using Push ID rather than a stream ID		o Identify server push using Push ID rather than a stream ID
	(#702,#281)		(#702,#281)
	o DATA frames cannot be empty (#700)		o DATA frames cannot be empty (#700)
	B.3. Since draft-ietf-quic-http-03		B.4. Since draft-ietf-quic-http-03
	None.		None.
	B.4. Since draft-ietf-quic-http-02		B.5. Since draft-ietf-quic-http-02
	o Track changes in transport draft		o Track changes in transport draft
	B.5. Since draft-ietf-quic-http-01		B.6. Since draft-ietf-quic-http-01
	o SETTINGS changes (#181):		o SETTINGS changes (#181):
	* SETTINGS can be sent only once at the start of a connection; no		* SETTINGS can be sent only once at the start of a connection; no
	changes thereafter		changes thereafter
	* SETTINGS_ACK removed		* SETTINGS_ACK removed
	* Settings can only occur in the SETTINGS frame a single time		* Settings can only occur in the SETTINGS frame a single time
	* Boolean format updated		* Boolean format updated
	o Alt-Svc parameter changed from "v" to "quic"; format updated		o Alt-Svc parameter changed from "v" to "quic"; format updated
	(#229)		(#229)
	o Closing the connection control stream or any message control		o Closing the connection control stream or any message control
	stream is a fatal error (#176)		stream is a fatal error (#176)
	o HPACK Sequence counter can wrap (#173)		o HPACK Sequence counter can wrap (#173)
	o 0-RTT guidance added		o 0-RTT guidance added
	o Guide to differences from HTTP/2 and porting HTTP/2 extensions		o Guide to differences from HTTP/2 and porting HTTP/2 extensions
	added (#127,#242)		added (#127,#242)
	B.6. Since draft-ietf-quic-http-00		B.7. Since draft-ietf-quic-http-00
	o Changed "HTTP/2-over-QUIC" to "HTTP/QUIC" throughout (#11,#29)		o Changed "HTTP/2-over-QUIC" to "HTTP/QUIC" throughout (#11,#29)
	o Changed from using HTTP/2 framing within Stream 3 to new framing		o Changed from using HTTP/2 framing within Stream 3 to new framing
	format and two-stream-per-request model (#71,#72,#73)		format and two-stream-per-request model (#71,#72,#73)
	o Adopted SETTINGS format from draft-bishop-httpbis-extended-		o Adopted SETTINGS format from draft-bishop-httpbis-extended-
	settings-01		settings-01
	o Reworked SETTINGS_ACK to account for indeterminate inter-stream		o Reworked SETTINGS_ACK to account for indeterminate inter-stream
	order (#75)		order (#75)
	o Described CONNECT pseudo-method (#95)		o Described CONNECT pseudo-method (#95)
	o Updated ALPN token and Alt-Svc guidance (#13,#87)		o Updated ALPN token and Alt-Svc guidance (#13,#87)
	o Application-layer-defined error codes (#19,#74)		o Application-layer-defined error codes (#19,#74)
	B.7. Since draft-shade-quic-http2-mapping-00		B.8. Since draft-shade-quic-http2-mapping-00
	o Adopted as base for draft-ietf-quic-http		o Adopted as base for draft-ietf-quic-http
	o Updated authors/editors list		o Updated authors/editors list
	Author's Address		Author's Address
	Mike Bishop (editor)		Mike Bishop (editor)
	Microsoft		Microsoft
End of changes. 58 change blocks.
	156 lines changed or deleted		183 lines changed or added
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