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Code Issues Releases Wiki Activity

1.2rc2

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stpeter 2011-02-17 19:40:36 -07:00
parent 7a0e302d58
commit cbb116b86c
1 changed files with 19 additions and 10 deletions
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xep-0198.xml
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@ -30,8 +30,8 @@
&dcridland;
&mwild;
<revision>
<version>1.2rc1</version>
<date>2011-02-11</date>
<version>1.2rc2</version>
<date>2011-02-17</date>
<initials>psa/dc/mw</initials>
<remark><p>Simplification based on implementation experience: removed acking per number of stanzas exchanged because either entity can request an ack at any time; moved throttling feature to a separate specification; removed 'stanzas' attribute from &lt;enable/&gt; element; added 'location' attribute to &lt;enabled/&gt; element; clarified several implementation issues in the text; fixed several examples; versioned the XML namespace from urn:xmpp:sm:2 to urn:xmpp:sm:3.</p></remark>
</revision>
@ -204,7 +204,7 @@ S: <enabled xmlns='urn:xmpp:sm:3'/>
S: <enabled xmlns='urn:xmpp:sm:3' id='some-long-sm-id' resume='true'/>
]]></example>
<p>The &lt;enabled/&gt; element MAY include a 'max' attribute to specify the receiving entity's preferred maximum resumption time.</p>
<p>The &lt;enabled/&gt; element MAY include a 'location' attribute to specify the receiving entity's preferred IP address or hostname (optionally with a port) for reconnection; if reconnection to that location fails, the standard XMPP connection algorithm specified in &xmppcore; applies.</p>
<p>The &lt;enabled/&gt; element MAY include a 'location' attribute to specify the receiving entity's preferred IP address or hostname (optionally with a port) for reconnection, in the form specified in Section 4.9.3.19 of &rfc3920bis; (i.e., "domainpart:port", where IPv6 addresses are enclosed in square brackets "[...]" as described in &rfc5952;); if reconnection to that location fails, the standard XMPP connection algorithm specified in &xmppcore; applies.</p>
<p>The initiating entity MUST NOT attempt to negotiate stream management until it is authenticated; i.e., it MUST NOT send an &lt;enable/&gt; element until after authentication (such as SASL, &xep0078; or &xep0220;) has been completed successfully.</p>
<p>For client-to-server connections, the client MUST NOT attempt to enable stream management until after it has completed Resource Binding <em>unless it is resuming a previous session</em> (see <link url='#resumption'>Resumption</link>).</p>
<p>The server SHALL enforce this order and return a &lt;failed/&gt; element in response if the order is violated (see <link url='#errors'>Error Handling</link>).</p>
@ -248,14 +248,15 @@ C: <message from='laurence@example.net/churchyard'
<!-- Note that client need not wait for a response. -->
S: <enabled xmlns='urn:xmpp:sm:3' location='cm66.example.net'/>
S: <enabled xmlns='urn:xmpp:sm:3'/>
<!-- Server receives enable, and responds,
setting both inbound and outbound counts
to zero.
In addition, client sets inbound count to zero.
-->
<!--
Server receives enable, and responds,
setting both inbound and outbound counts
to zero.
In addition, client sets inbound count to zero.
-->
C: <r xmlns='urn:xmpp:sm:3'/>
@ -283,8 +284,16 @@ C: <enable xmlns='urn:xmpp:sm:3' resume='true'/>
S: <enabled xmlns='urn:xmpp:sm:3' id='some-long-sm-id' resume='true'/>
]]></example>
<p class='def'><strong>Definition:</strong> The 'id' attribute defines a unique identifier for purposes of stream management (an "SM-ID"). The SM-ID MUST be generated by the receiving entity (server). The initiating entity MUST consider the SM-ID to be opaque and therefore MUST NOT assign any semantic meaning to the SM-ID. The receiving entity MAY encode any information it deems useful into the SM-ID, such as the full JID &LOCALFULL; of a connected client (e.g., the full JID plus a nonce value). Any characters allowed in an XML attribute are allowed. The SM-ID MUST NOT be reused for simultaneous or subsequent sessions (but the server need not ensure that SM-IDs are unique for all time, only for as long as the server is continuously running). The SM-ID SHOULD NOT be longer than 4000 bytes.</p>
<p>As noted, the &lt;enabled/&gt; element MAY include a 'location' attribute that specifies the server's preferred location for reconnecting (e.g., a particular connection manager that hold session state for the connected client).</p>
<example caption='Server prefers reconnection at a particular location'><![CDATA[
S: <enabled xmlns='urn:xmpp:sm:3'
id='some-long-sm-id'
location='[2001:41D0:1:A49b::1]:9222'
resume='true'/>
]]></example>
<p>If the stream is terminated unexpectedly, the initiating entity would then open a TCP connection to the receiving entity. The order of events is as follows:</p>
<ol start='1'>
<li>After disconnection, the initiating entity opens a new TCP connection to the receiving entity, preferring the address specified in the 'location' attribute (if any).</li>
<li>Initiating entity sends initial stream header.</li>
<li>Receiving entity sends response stream header.</li>
<li>Receiving entity sends stream features.</li>