draft-ietf-quic-recovery-15.txt		draft-ietf-quic-recovery-latest.txt
	QUIC Working Group J. Iyengar, Ed.		QUIC Working Group J. Iyengar, Ed.
	Internet-Draft Fastly		Internet-Draft Fastly
	Intended status: Standards Track I. Swett, Ed.		Intended status: Standards Track I. Swett, Ed.
	Expires: April 6, 2019 Google		Expires: April 16, 2019 Google
	October 3, 2018		October 13, 2018
	QUIC Loss Detection and Congestion Control		QUIC Loss Detection and Congestion Control
	draft-ietf-quic-recovery-15		draft-ietf-quic-recovery-latest
	Abstract		Abstract
	This document describes loss detection and congestion control		This document describes loss detection and congestion control
	mechanisms for QUIC.		mechanisms for 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
	skipping to change at page 1, line 42 ¶		skipping to change at page 1, line 42 ¶
	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 https://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 April 6, 2019.		This Internet-Draft will expire on April 16, 2019.
	Copyright Notice		Copyright Notice
	Copyright (c) 2018 IETF Trust and the persons identified as the		Copyright (c) 2018 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
	(https://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
	skipping to change at page 29, line 16 ¶		skipping to change at page 29, line 16 ¶
	QUIC decreases the congestion window to the minimum value once the		QUIC decreases the congestion window to the minimum value once the
	retransmission timeout has been verified and removes any packets sent		retransmission timeout has been verified and removes any packets sent
	before the newly acknowledged RTO packet.		before the newly acknowledged RTO packet.
	OnRetransmissionTimeoutVerified(packet_number)		OnRetransmissionTimeoutVerified(packet_number)
	congestion_window = kMinimumWindow		congestion_window = kMinimumWindow
	// Declare all packets prior to packet_number lost.		// Declare all packets prior to packet_number lost.
	for (sent_packet: sent_packets):		for (sent_packet: sent_packets):
	if (sent_packet.packet_number < packet_number):		if (sent_packet.packet_number < packet_number):
	bytes_in_flight -= lost_packet.bytes		bytes_in_flight -= sent_packet.bytes
	sent_packets.remove(sent_packet.packet_number)		sent_packets.remove(sent_packet.packet_number)
	6. Security Considerations		6. Security Considerations
	6.1. Congestion Signals		6.1. Congestion Signals
	Congestion control fundamentally involves the consumption of signals		Congestion control fundamentally involves the consumption of signals
	- both loss and ECN codepoints - from unauthenticated entities. On-		- both loss and ECN codepoints - from unauthenticated entities. On-
	path attackers can spoof or alter these signals. An attacker can		path attackers can spoof or alter these signals. An attacker can
	cause endpoints to reduce their sending rate by dropping packets, or		cause endpoints to reduce their sending rate by dropping packets, or
	skipping to change at page 30, line 22 ¶		skipping to change at page 30, line 22 ¶
	This document has no IANA actions. Yet.		This document has no IANA actions. Yet.
	8. References		8. References
	8.1. Normative References		8.1. 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-15 (work in progress).		transport-latest (work in progress).
	[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,		DOI 10.17487/RFC2119, March 1997,
	<https://www.rfc-editor.org/info/rfc2119>.		<https://www.rfc-editor.org/info/rfc2119>.
	[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC		[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
	2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,		2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
	May 2017, <https://www.rfc-editor.org/info/rfc8174>.		May 2017, <https://www.rfc-editor.org/info/rfc8174>.
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