[OpenSER-Users] A function to know if a user is registered?

Because I use pua_usrloc I want to apply pua_set_publish() in a REGISTER only if the user wasn't already registered (in order to avoid new NOTIFY with just "online" which can substitute the user client real state PUBLISH). So I need a function to determine if the user is registered. I can't use: if ( ! lookup("location") { ... because that function checks the URI in "location" table, and in a REGISTER message the URI is just: sip:server So I need a function to check if the "To:" field ($tu) is registered. Is that exist? or should I make a custom avp_query and so? Thanks. -- Iñaki Baz Castillo ibc(a)in.ilimit.es