[SR-Users] Meaning of empty body in NOTIFY

[Daniel-Constantin Mierla]

Hello,

On 6/11/11 6:54 AM, Iñaki Baz Castillo wrote:
> 2011/6/10 Daniel-Constantin Mierla<miconda at gmail.com>:
>> have you spotted in SIP/SIMPLE specs what has to be sent when the presentity
>> is offline? My quick google was not that succesful. Maybe Inaki has the
>> specs more fresh indexed in memory and can help.
> If the user has not published a "offline" presentity, then the server
> must not generate one. Sending an empty NOTIFY is the correct
> behaviour, which means "unknown state" (most of the subscribers should
> interpret it as  "offline").
>
> What is the purpose of publishing a presentity with "offline" status?
> Well, as most of the SIMPLE presence stuff, it's just a way to make
> things hyper-complex.
>
> There is however an exception: RFC 4827. The client goes on holidays
> for long time and decides to upload,, via *XCAP* a *permanent* (non
> expirable as a PUBLISH publication) pidf document in which it set the
> info it desires (maybe a status "offline" with a message "I'm on
> holiday until June 20").
right, it was the rfc i wanted to search for -- this features in 
kamailio presence implementation, can be controlled via module parameter 
pidf_manipulation , see:
http://kamailio.org/docs/modules/stable/modules_k/presence_xml.html#id2940723

Cheers,
Daniel

-- 
Daniel-Constantin Mierla -- http://www.asipto.com
http://linkedin.com/in/miconda -- http://twitter.com/miconda