Applicability of the QUIC Transport Protocol
draft-ietf-quic-applicability-06
Network Working Group M. Kuehlewind
Internet-Draft Ericsson
Intended status: Informational B. Trammell
Expires: 9 July 2020 Google
6 January 2020
Applicability of the QUIC Transport Protocol
draft-ietf-quic-applicability-06
Abstract
This document discusses the applicability of the QUIC transport
protocol, focusing on caveats impacting application protocol
development and deployment over QUIC. Its intended audience is
designers of application protocol mappings to QUIC, and implementors
of these application protocols.
Status of This Memo
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This Internet-Draft will expire on 9 July 2020.
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Kuehlewind & Trammell Expires 9 July 2020 [Page 1]
Internet-Draft QUIC Applicability January 2020
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Notational Conventions . . . . . . . . . . . . . . . . . 3
2. The Necessity of Fallback . . . . . . . . . . . . . . . . . . 3
3. Zero RTT . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Thinking in Zero RTT . . . . . . . . . . . . . . . . . . 4
3.2. Here There Be Dragons . . . . . . . . . . . . . . . . . . 4
3.3. Session resumption versus Keep-alive . . . . . . . . . . 5
4. Use of Streams . . . . . . . . . . . . . . . . . . . . . . . 6
4.1. Stream versus Flow Multiplexing . . . . . . . . . . . . . 7
4.2. Prioritization . . . . . . . . . . . . . . . . . . . . . 7
4.3. Flow Control Deadlocks . . . . . . . . . . . . . . . . . 7
5. Packetization and Latency . . . . . . . . . . . . . . . . . . 9
6. Port Selection . . . . . . . . . . . . . . . . . . . . . . . 9
7. Connection Migration . . . . . . . . . . . . . . . . . . . . 10
8. Connection closure . . . . . . . . . . . . . . . . . . . . . 10
9. Information exposure and the Connection ID . . . . . . . . . 11
9.1. Server-Generated Connection ID . . . . . . . . . . . . . 11
9.2. Mitigating Timing Linkability with Connection ID
Migration . . . . . . . . . . . . . . . . . . . . . . . . 12
9.3. Using Server Retry for Redirection . . . . . . . . . . . 12
10. Use of Versions and Cryptographic Handshake . . . . . . . . . 12
11. Enabling New Versions . . . . . . . . . . . . . . . . . . . . 13
12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
13. Security Considerations . . . . . . . . . . . . . . . . . . . 14
14. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 14
15. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 14
16. References . . . . . . . . . . . . . . . . . . . . . . . . . 14
16.1. Normative References . . . . . . . . . . . . . . . . . . 14
16.2. Informative References . . . . . . . . . . . . . . . . . 15
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 16
1. Introduction
QUIC [QUIC] is a new transport protocol currently under development
in the IETF quic working group, focusing on support of semantics as
needed for HTTP/2 [QUIC-HTTP] such as stream-multiplexing to avoid
head-of-line blocking. Based on current deployment practices, QUIC
is encapsulated in UDP. The version of QUIC that is currently under
development will integrate TLS 1.3 [TLS13] to encrypt all payload
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