[OpenSER-Users] Why RPID related functions instead of PAI?

Alan Crosswell alan at columbia.edu
Sun Jan 20 19:11:48 CET 2008


RPID died and was replaced by PAI, but not until after thousands of  
implementations of UA made RPID common.  Eventually it may go away....



On Jan 20, 2008, at 3:20 AM, Iñaki Baz Castillo <ibc at aliax.net> wrote:

> Hi, "Remote-Party-ID" is a draft ("draft-ietf-sip-privacy-04") [1]  
> expired in
> 2002 while "P-Asserted-Identity" is a official RFC (3325) [2].
>
> I'd like to know why OpenSer manages RPID in some functions ("auth"  
> module)
> instead of PAI. I assume that some gateways just implement RPID and  
> so, but
> can't understand why PAI is ignored (the use of PAI is extended in  
> gateways).
>
> As a curiosity, both draft and RFC have really **common** parts, as
> chapter "Introduction" (4 in draft, 3 in RFC):
>
>  "3/4 Introduction
>
>   Various providers offering a telephony service over IP networks have
>   selected SIP as a call establishment protocol.  Their environments
>   require a way for trusted network elements operated by the service
>   providers (for example SIP proxy servers) to communicate the  
> identity
>   of the subscribers to such a service, yet also need to withhold this
>   information from entities that are not trusted when necessary.  Such
>   networks typically assume some level of transitive trust amongst
>   providers and the devices they operate.
>
>   These networks need to support certain traditional telephony  
> services
>   and meet basic regulatory and public safety requirements.  These
>   include Calling Identity Delivery services, Calling Identity  
> Delivery
>   Blocking, and the ability to trace the originator of a call ... "
>
>
> So my question is again:why OpenSer supports RPID related functions  
> and not
> PAI functions?
>
> Thanks for any explanation.
>
>
> [1] RPID: http://tools.ietf.org/html/draft-ietf-sip-privacy-04
> [2] PAI:  http://www.faqs.org/rfcs/rfc3325.html
>
>
>
>
> -- 
> Iñaki Baz Castillo
>
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> Users at lists.openser.org
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