Re: [reSIProcate] RFC 4661 support
The question is really too general. Are you looking for client side support or server side? Either-way - the events sent out for a particular subscription server written using resip/dum are in the control of the application. All the server/application would need to do is access the filter XML body from the SUBSCRIBE message, then honour the filter requirements when sending out notifications. For client side, all you really need to do is attach the filter XML body to the outbound SUBSCRIBE request.
Scott Godin
SIP Spectrum, Inc.