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Hello,<br>
<br>
<div class="moz-cite-prefix">On 20/01/16 12:34, Aleš Šturm wrote:<br>
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<p class="MsoNormal"><span lang="EN-US">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am using Kamailio 4.3
as Presence server and I have a question regarding NOTIFY
messages sent after publication status refresh. When PUA
sends refreshing PUBLISH request (before expiration)
Kamailio sends NOTIFY request. Large number of watchers per
one presentity causes large traffic.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">RFC3265 states: NOTIFY
messages are sent to inform subscribers of changes in state
to which the subscriber has a subscription.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">But when publication is
only refreshed (publication expiration is extended) the
publish state is not changed (PUBLISH without XML body).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">From RFC5839: The SIP
PUBLISH [RFC3903] method uses a similar mechanism, where a
refresh of a publication is done by reference to its
assigned entity-tag, instead of retransmitting the event
state each time the publication expiration is extended.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is it possible to
configure Kamailio that wouldn’t send NOTIFY request to
watchers when publication status refresh (PUBLISH without
XML Body) occur?</span></p>
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<br>
no NOTIFY should be sent? Or the NOTIFY in this case should be sent
without body, just with a new expire value and same etag?<br>
<br>
Cheers,<br>
Daniel<br>
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<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
<a class="moz-txt-link-freetext" href="http://twitter.com/#!/miconda">http://twitter.com/#!/miconda</a> - <a class="moz-txt-link-freetext" href="http://www.linkedin.com/in/miconda">http://www.linkedin.com/in/miconda</a>
Book: SIP Routing With Kamailio - <a class="moz-txt-link-freetext" href="http://www.asipto.com">http://www.asipto.com</a>
<a class="moz-txt-link-freetext" href="http://miconda.eu">http://miconda.eu</a></pre>
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