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ProtoXEP: WebSocket S2S

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Travis Burtrum 2022-06-13 20:30:07 -04:00
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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE xep SYSTEM 'xep.dtd' [
<!ENTITY % ents SYSTEM 'xep.ent'>
%ents;
]>
<?xml-stylesheet type='text/xsl' href='xep.xsl'?>
<xep>
<header>
<title>WebSocket S2S</title>
<abstract>This specification defines a procedure to make s2s XMPP connections over WebSocket.</abstract>
&LEGALNOTICE;
<number>xxxx</number>
<status>ProtoXEP</status>
<type>Standards Track</type>
<sig>Standards</sig>
<approver>Council</approver>
<dependencies>
<spec>XMPP Core</spec>
<spec>XEP-0156</spec>
</dependencies>
<supersedes/>
<supersededby/>
<shortname>NOT_YET_ASSIGNED</shortname>
<author>
<firstname>Travis</firstname>
<surname>Burtrum</surname>
<email>travis@burtrum.org</email>
<jid>travis@burtrum.org</jid>
</author>
<revision>
<version>0.0.1</version>
<date>2022-06-13</date>
<initials>tjb</initials>
<remark><p>First draft.</p></remark>
</revision>
</header>
<section1 topic='Introduction' anchor='intro'>
<p>&rfc7395; specifies how to make c2s connections over WebSocket. This XEP extends that to also support s2s connections over WebSocket.</p>
</section1>
<section1 topic='Requirements' anchor='reqs'>
<p>Everything mentioned in &rfc7395; should be followed with the following changes:</p>
<ol>
<li>Connection details are discovered by using &xep0156;</li>
<li>For c2s, &rfc7395; requires replacing the 'jabber:client' namespace with 'urn:ietf:params:xml:ns:xmpp-framing', for s2s, the 'jabber:server' namespace should be replaced with 'urn:ietf:params:xml:ns:xmpp-framing-server'.</li>
<li>wss (TLS) upgraded to a MUST be used, therefore SASL EXTERNAL authentication can be used as defined in &xmppcore;</li>
</ol>
</section1>
<section1 topic='Use Cases' anchor='usecases'>
<p>Some hosting services only allow HTTPS proxies to access servers, meaning federating XMPP servers cannot be ran on these hosts unless s2s is accessible over HTTPS.</p>
</section1>
<section1 topic='Security Considerations' anchor='security'>
<p>Identical to <link url='https://datatracker.ietf.org/doc/html/rfc7395#page-12'>RFC 7395 Security Considerations</link>.</p>
</section1>
<section1 topic='IANA Considerations' anchor='iana'>
<p>A URN sub-namespace for framing of s2s Extensible Messaging and Presence
Protocol (XMPP) streams is defined as follows.</p>
<p>URI: urn:ietf:params:xml:ns:xmpp-framing-server</p>
<p>Specification: this document</p>
<p>Registrant Contact: IESG &lt;iesg@ietf.org&gt;</p>
</section1>
<section1 topic='XMPP Registrar Considerations' anchor='registrar'>
<p>This document requires no interaction with the &REGISTRAR;.</p>
</section1>
</xep>