QUIC-Aware Proxying Using CONNECT-UDP
draft-pauly-masque-quic-proxy-00

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Network Working Group                                           T. Pauly
Internet-Draft                                                Apple Inc.
Intended status: Experimental                                D. Schinazi
Expires: 21 April 2021                                        Google LLC
                                                         18 October 2020

                 QUIC-Aware Proxying Using CONNECT-UDP
                    draft-pauly-masque-quic-proxy-00

Abstract

   This document defines an extension to the CONNECT-UDP HTTP method
   that adds specific optimizations for QUIC connections that are
   proxied.  This extension allows a proxy to reuse UDP 4-tuples for
   multiple connections.  It also defines a mode of proxying in which
   QUIC short header packets can be forwarded through the proxy rather
   than being re-encapsulated and re-encrypted.

Discussion Venues

   This note is to be removed before publishing as an RFC.

   Source for this draft and an issue tracker can be found at
   https://github.com/tfpauly/quic-proxy (https://github.com/tfpauly/
   quic-proxy).

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on 21 April 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Internet-Draft                 QUIC Proxy                   October 2020

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.  Code Components
   extracted from this document must include Simplified BSD License text
   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions and Definitions . . . . . . . . . . . . . . .   4
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Required Proxy State  . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Datagram Flow ID Mapping  . . . . . . . . . . . . . . . .   5
     2.2.  Server Connection ID Mapping  . . . . . . . . . . . . . .   6
     2.3.  Client Connection ID Mappings . . . . . . . . . . . . . .   6
     2.4.  Detecting Connection ID Conflicts . . . . . . . . . . . .   6
   3.  Connection ID Headers for CONNECT-UDP . . . . . . . . . . . .   7
   4.  Client Request Behavior . . . . . . . . . . . . . . . . . . .   8
     4.1.  New Proxied Connection Setup  . . . . . . . . . . . . . .   8
     4.2.  Adding New Client Connection IDs  . . . . . . . . . . . .   9
     4.3.  Sending With Forwarded Mode . . . . . . . . . . . . . . .   9
     4.4.  Receiving With Forwarded Mode . . . . . . . . . . . . . .  10
     4.5.  Opting Out of Forwarded Mode  . . . . . . . . . . . . . .  10
   5.  Proxy Response Behavior . . . . . . . . . . . . . . . . . . .  10
     5.1.  Removing Mapping State  . . . . . . . . . . . . . . . . .  12
   6.  Example . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
   7.  Interactions with Load Balancers  . . . . . . . . . . . . . .  14
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
     9.1.  HTTP Headers  . . . . . . . . . . . . . . . . . . . . . .  15
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     10.2.  Informative References . . . . . . . . . . . . . . . . .  16
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  16
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

1.  Introduction

   The CONNECT-UDP HTTP method [CONNECT-UDP] defines a way to send
   datagrams through an HTTP proxy, where UDP is used to communicate
   between the proxy and a target server.  This can be used to proxy
   QUIC connections [QUIC], since QUIC runs over UDP datagrams.

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