[OpenSIPS-Users] Presence for routing logic

[Carlo Dimaggio]

Il 16/02/11 18.19, Anca Vamanu ha scritto:
> Hi Carlo,
>
> Here are my ideas about this.
> One solution would be to insert into usr_preferences table a record 
> with the URI where the call must be forwarded for the user (you can 
> put the username in RURI) when the presence status is "meeting", 
> "holiday", etc. And delete it when changes into something else.
> Now the question is where to do this. In the OpenSIPS script is very 
> hard - you have to make regexps to extract the status from the Publish 
> body, select from database the previous stored state and apply the 
> regexp again, very inefficient. The other solutions are an external 
> application or an opensips module. The external application could 
> query the presentity table periodically or maybe be called by a 
> trigger at insert ( not sure this is possible). The module can export 
> a function to be called before handle_publish to analyze the previous 
> and the current state.
> Then when handling Invites - do avp_db_load for the caller and if a 
> record is found forward it to that URI.

Hi Anca,
thank you for your interesting point of view.

Indeed I was thinking about the development of a new presence module (or 
a function) but for checking the subscriber status directly from the 
XCAP server. In this way in the script (INVITE) I should do 
xcap_check_status for the callee, do an avp_db_load and forward the 
caller to the URI stored in usr_preferences (linked to the presence status).

This is just a proof of concept, as I need a better understanding of all 
opensips presence modules.


Best regards,
Carlo Dimaggio
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