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draft-ietf-quic-transport.html
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<!DOCTYPE html>
<html lang="en" class="Internet-Draft">
<head>
<meta charset="utf-8">
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<title>QUIC: A UDP-Based Multiplexed and Secure Transport</title>
<meta content="Jana Iyengar" name="author">
<meta content="Martin Thomson" name="author">
<meta content="
This document defines the core of the QUIC transport protocol. Accompanying
documents describe QUIC's loss detection and congestion control and the use of
TLS for key negotiation.
" name="description">
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<link href="draft-ietf-quic-transport.xml" rel="alternate" type="application/rfc+xml">
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<body>
<table class="ears">
<thead><tr>
<td class="left">Internet-Draft</td>
<td class="center">QUIC Transport Protocol</td>
<td class="right">August 2020</td>
</tr></thead>
<tfoot><tr>
<td class="left">Iyengar & Thomson</td>
<td class="center">Expires 18 February 2021</td>
<td class="right">[Page]</td>
</tr></tfoot>
</table>
<div id="external-metadata" class="document-information"></div>
<div id="internal-metadata" class="document-information">
<dl id="identifiers">
<dt class="label-workgroup">Workgroup:</dt>
<dd class="workgroup">QUIC</dd>
<dt class="label-internet-draft">Internet-Draft:</dt>
<dd class="internet-draft">draft-ietf-quic-transport-latest</dd>
<dt class="label-published">Published:</dt>
<dd class="published">
<time datetime="2020-08-17" class="published">17 August 2020</time>
</dd>
<dt class="label-intended-status">Intended Status:</dt>
<dd class="intended-status">Standards Track</dd>
<dt class="label-expires">Expires:</dt>
<dd class="expires"><time datetime="2021-02-18">18 February 2021</time></dd>
<dt class="label-authors">Authors:</dt>
<dd class="authors">
<div class="author">
<div class="author-name">J. Iyengar, <span class="editor">Ed.</span>
</div>
<div class="org">Fastly</div>
</div>
<div class="author">
<div class="author-name">M. Thomson, <span class="editor">Ed.</span>
</div>
<div class="org">Mozilla</div>
</div>
</dd>
</dl>
</div>
<h1 id="title">QUIC: A UDP-Based Multiplexed and Secure Transport</h1>
<section id="section-abstract">
<h2 id="abstract"><a href="#abstract" class="selfRef">Abstract</a></h2>
<p id="section-abstract-1">This document defines the core of the QUIC transport protocol. Accompanying
documents describe QUIC's loss detection and congestion control and the use of
TLS for key negotiation.<a href="#section-abstract-1" class="pilcrow">¶</a></p>
</section>
<section class="note" id="section-note.1">
<h2 id="name-note-to-readers">
<a href="#name-note-to-readers" class="section-name selfRef">Note to Readers</a>
</h2>
<p id="section-note.1-1">Discussion of this draft takes place on the QUIC working group mailing list
(<a href="mailto:quic@ietf.org">quic@ietf.org</a>), which is archived at
<span><a href="https://mailarchive.ietf.org/arch/search/?email_list=quic">https://mailarchive.ietf.org/arch/search/?email_list=quic</a></span><a href="#section-note.1-1" class="pilcrow">¶</a></p>
<p id="section-note.1-2">Working Group information can be found at <span><a href="https://github.com/quicwg">https://github.com/quicwg</a></span>; source
code and issues list for this draft can be found at
<span><a href="https://github.com/quicwg/base-drafts/labels/-transport">https://github.com/quicwg/base-drafts/labels/-transport</a></span>.<a href="#section-note.1-2" class="pilcrow">¶</a></p>
</section>
<div id="status-of-memo">
<section id="section-boilerplate.1">
<h2 id="name-status-of-this-memo">
<a href="#name-status-of-this-memo" class="section-name selfRef">Status of This Memo</a>
</h2>
<p id="section-boilerplate.1-1">
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.<a href="#section-boilerplate.1-1" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-2">
Internet-Drafts are working documents of the Internet Engineering Task
Force (IETF). Note that other groups may also distribute working
documents as Internet-Drafts. The list of current Internet-Drafts is
at <span><a href="https://datatracker.ietf.org/drafts/current/">https://datatracker.ietf.org/drafts/current/</a></span>.<a href="#section-boilerplate.1-2" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-3">
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."<a href="#section-boilerplate.1-3" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-4">
This Internet-Draft will expire on 18 February 2021.<a href="#section-boilerplate.1-4" class="pilcrow">¶</a></p>
</section>
</div>
<div id="copyright">
<section id="section-boilerplate.2">
<h2 id="name-copyright-notice">
<a href="#name-copyright-notice" class="section-name selfRef">Copyright Notice</a>
</h2>
<p id="section-boilerplate.2-1">
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.<a href="#section-boilerplate.2-1" class="pilcrow">¶</a></p>
<p id="section-boilerplate.2-2">
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(<span><a href="https://trustee.ietf.org/license-info">https://trustee.ietf.org/license-info</a></span>) 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.<a href="#section-boilerplate.2-2" class="pilcrow">¶</a></p>
</section>
</div>
<div id="toc">
<section id="section-toc.1">
<a href="#" onclick="scroll(0,0)" class="toplink">▲</a><h2 id="name-table-of-contents">
<a href="#name-table-of-contents" class="section-name selfRef">Table of Contents</a>
</h2>
<nav class="toc"><ul class="compact ulEmpty toc">
<li class="compact ulEmpty toc" id="section-toc.1-1.1">
<p id="section-toc.1-1.1.1"><a href="#section-1" class="xref">1</a>. <a href="#name-overview" class="xref">Overview</a><a href="#section-toc.1-1.1.1" class="pilcrow">¶</a></p>
<ul class="compact ulEmpty toc">
<li class="compact ulEmpty toc" id="section-toc.1-1.1.2.1">
<p id="section-toc.1-1.1.2.1.1" class="keepWithNext"><a href="#section-1.1" class="xref">1.1</a>. <a href="#name-document-structure" class="xref">Document Structure</a><a href="#section-toc.1-1.1.2.1.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.1.2.2">
<p id="section-toc.1-1.1.2.2.1" class="keepWithNext"><a href="#section-1.2" class="xref">1.2</a>. <a href="#name-terms-and-definitions" class="xref">Terms and Definitions</a><a href="#section-toc.1-1.1.2.2.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.1.2.3">
<p id="section-toc.1-1.1.2.3.1" class="keepWithNext"><a href="#section-1.3" class="xref">1.3</a>. <a href="#name-notational-conventions" class="xref">Notational Conventions</a><a href="#section-toc.1-1.1.2.3.1" class="pilcrow">¶</a></p>
</li>
</ul>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.2">
<p id="section-toc.1-1.2.1"><a href="#section-2" class="xref">2</a>. <a href="#name-streams" class="xref">Streams</a><a href="#section-toc.1-1.2.1" class="pilcrow">¶</a></p>
<ul class="compact ulEmpty toc">
<li class="compact ulEmpty toc" id="section-toc.1-1.2.2.1">
<p id="section-toc.1-1.2.2.1.1"><a href="#section-2.1" class="xref">2.1</a>. <a href="#name-stream-types-and-identifier" class="xref">Stream Types and Identifiers</a><a href="#section-toc.1-1.2.2.1.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.2.2.2">
<p id="section-toc.1-1.2.2.2.1"><a href="#section-2.2" class="xref">2.2</a>. <a href="#name-sending-and-receiving-data" class="xref">Sending and Receiving Data</a><a href="#section-toc.1-1.2.2.2.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.2.2.3">
<p id="section-toc.1-1.2.2.3.1"><a href="#section-2.3" class="xref">2.3</a>. <a href="#name-stream-prioritization" class="xref">Stream Prioritization</a><a href="#section-toc.1-1.2.2.3.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.2.2.4">
<p id="section-toc.1-1.2.2.4.1"><a href="#section-2.4" class="xref">2.4</a>. <a href="#name-required-operations-on-stre" class="xref">Required Operations on Streams</a><a href="#section-toc.1-1.2.2.4.1" class="pilcrow">¶</a></p>
</li>
</ul>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.3">
<p id="section-toc.1-1.3.1"><a href="#section-3" class="xref">3</a>. <a href="#name-stream-states" class="xref">Stream States</a><a href="#section-toc.1-1.3.1" class="pilcrow">¶</a></p>
<ul class="compact ulEmpty toc">
<li class="compact ulEmpty toc" id="section-toc.1-1.3.2.1">
<p id="section-toc.1-1.3.2.1.1"><a href="#section-3.1" class="xref">3.1</a>. <a href="#name-sending-stream-states" class="xref">Sending Stream States</a><a href="#section-toc.1-1.3.2.1.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.3.2.2">
<p id="section-toc.1-1.3.2.2.1"><a href="#section-3.2" class="xref">3.2</a>. <a href="#name-receiving-stream-states" class="xref">Receiving Stream States</a><a href="#section-toc.1-1.3.2.2.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.3.2.3">
<p id="section-toc.1-1.3.2.3.1"><a href="#section-3.3" class="xref">3.3</a>. <a href="#name-permitted-frame-types" class="xref">Permitted Frame Types</a><a href="#section-toc.1-1.3.2.3.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.3.2.4">
<p id="section-toc.1-1.3.2.4.1"><a href="#section-3.4" class="xref">3.4</a>. <a href="#name-bidirectional-stream-states" class="xref">Bidirectional Stream States</a><a href="#section-toc.1-1.3.2.4.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.3.2.5">
<p id="section-toc.1-1.3.2.5.1"><a href="#section-3.5" class="xref">3.5</a>. <a href="#name-solicited-state-transitions" class="xref">Solicited State Transitions</a><a href="#section-toc.1-1.3.2.5.1" class="pilcrow">¶</a></p>
</li>
</ul>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.4">
<p id="section-toc.1-1.4.1"><a href="#section-4" class="xref">4</a>. <a href="#name-flow-control" class="xref">Flow Control</a><a href="#section-toc.1-1.4.1" class="pilcrow">¶</a></p>
<ul class="compact ulEmpty toc">
<li class="compact ulEmpty toc" id="section-toc.1-1.4.2.1">
<p id="section-toc.1-1.4.2.1.1"><a href="#section-4.1" class="xref">4.1</a>. <a href="#name-data-flow-control" class="xref">Data Flow Control</a><a href="#section-toc.1-1.4.2.1.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.4.2.2">
<p id="section-toc.1-1.4.2.2.1"><a href="#section-4.2" class="xref">4.2</a>. <a href="#name-increasing-flow-control-lim" class="xref">Increasing Flow Control Limits</a><a href="#section-toc.1-1.4.2.2.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.4.2.3">
<p id="section-toc.1-1.4.2.3.1"><a href="#section-4.3" class="xref">4.3</a>. <a href="#name-handling-stream-cancellatio" class="xref">Handling Stream Cancellation</a><a href="#section-toc.1-1.4.2.3.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.4.2.4">
<p id="section-toc.1-1.4.2.4.1"><a href="#section-4.4" class="xref">4.4</a>. <a href="#name-stream-final-size" class="xref">Stream Final Size</a><a href="#section-toc.1-1.4.2.4.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.4.2.5">
<p id="section-toc.1-1.4.2.5.1"><a href="#section-4.5" class="xref">4.5</a>. <a href="#name-controlling-concurrency" class="xref">Controlling Concurrency</a><a href="#section-toc.1-1.4.2.5.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.4.2.6">
<p id="section-toc.1-1.4.2.6.1"><a href="#section-4.6" class="xref">4.6</a>. <a href="#name-flow-control-performance" class="xref">Flow Control Performance</a><a href="#section-toc.1-1.4.2.6.1" class="pilcrow">¶</a></p>
</li>
</ul>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.5">
<p id="section-toc.1-1.5.1"><a href="#section-5" class="xref">5</a>. <a href="#name-connections" class="xref">Connections</a><a href="#section-toc.1-1.5.1" class="pilcrow">¶</a></p>
<ul class="compact ulEmpty toc">
<li class="compact ulEmpty toc" id="section-toc.1-1.5.2.1">
<p id="section-toc.1-1.5.2.1.1"><a href="#section-5.1" class="xref">5.1</a>. <a href="#name-connection-id" class="xref">Connection ID</a><a href="#section-toc.1-1.5.2.1.1" class="pilcrow">¶</a></p>
<ul class="compact ulEmpty toc">
<li class="compact ulEmpty toc" id="section-toc.1-1.5.2.1.2.1">
<p id="section-toc.1-1.5.2.1.2.1.1"><a href="#section-5.1.1" class="xref">5.1.1</a>. <a href="#name-issuing-connection-ids" class="xref">Issuing Connection IDs</a><a href="#section-toc.1-1.5.2.1.2.1.1" class="pilcrow">¶</a></p>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.5.2.1.2.2">
<p id="section-toc.1-1.5.2.1.2.2.1"><a href="#section-5.1.2" class="xref">5.1.2</a>. <a href="#name-consuming-and-retiring-conn" class="xref">Consuming and Retiring Connection IDs</a><a href="#section-toc.1-1.5.2.1.2.2.1" class="pilcrow">¶</a></p>
</li>
</ul>
</li>
<li class="compact ulEmpty toc" id="section-toc.1-1.5.2.2">
<p id="section-toc.1-1.5.2.2.1"><a href="#section-5.2" class="xref">5.2</a>. <a href="#name-matching-packets-to-connect" class="xref">Matching Packets to Connections</a><a href="#section-toc.1-1.5.2.2.1" class="pilcrow">¶</a></p>
<ul class="compact ulEmpty toc">
<li class="compact ulEmpty toc" id="section-toc.1-1.5.2.2.2.1">