Hello everybody,
during last week a new set of modules have been introduced to CVS
repository. They are prefixed with 'pua' which stands for 'presesece
user agent'. There is one module actually having the name 'pua',
which implements the common API needed by other modules from this
category.
At this moment there are two modules which behave as presence user
agent for user location records (pua_usrloc) and presence user agent
for external applications which can use new management interface (MI
- via FIFO file or XMLRPC) to publish details -- this module is named
pua_mi. Next step in this direction will be implementation of PUA for
xmpp.
With pua_usrloc module you can configure OpenSER to publish
online/offline status in behalf of SIP devices registered to OpenSER
but not supporting presence extensions. The users which have phones
supporting presence extension can see if the other users are
registered or not.
pua_mi module is one very interesting. It enables external
applications to publish presence information, through a FIFO file or
XMLRPC at this moment. In this way, basically one adds SIMPLE support
to whatever they need in a easy and comfortable manner. PUBLISH
support is there, SUBSCRIBE is implemented but needs an outward
communication channel from OpenSER while MI is inward.
Having two new features in place (the MI and SIMPLE/Presence stuff),
I though it may be more appealing to start trying and testing if some
examples are made available. Therefore I created a dokuwiki page
where you can find two shell scripts along with OpenSER configuration
file.
http://openser.org/dokuwiki/doku.php/presence:pua-modules
One of the shell scripts publishes details from operating system:
logged in users (U), system CPU usage(C), free memory (M) and load
average (L).
The other one publishes details gathered from OpenSER statistics:
processed SIP requests (R), active transactions (T) and user location
records (U).
I think they are good examples to start with. I made two screenshots
of XLite v3.0 subscribed to such presence information.
http://www.openser.org/downloads/presence/xlite-openser-system.jpg
http://www.openser.org/downloads/presence/xlite-openser-stats.jpg
Readme files for these new modules:
http://www.openser.org/docs/modules/1.2.x/pua.html
http://www.openser.org/docs/modules/1.2.x/pua_mi.html
http://www.openser.org/docs/modules/1.2.x/pua_usrloc.html
We have a lot of new code in place, the testing is a very appreciated
help you can give.
Cheers,
Daniel
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