[OpenSIPS-Users] DIfference between R-URI and Destination URI in openSIPs

[Bogdan-Andrei Iancu]

Hi Mohamed,

Use t_relay(), the (transactional) statefull way to send out a SIP request.

Regards,

Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
   https://www.opensips-solutions.com
   https://www.siphub.com

On 31.07.2024 14:46, Mohamed OUALLA wrote:
> [...]
>
>   One last question: What is the most effective way to connect the 
> caller and callee in a simple VoIP call setup (Caller - SIP Proxy - 
> Callee)? Should I change the *$ru* and then use *forward()* for 
> stateless routing or *t_relay()* for stateful routing, or is there 
> another method you would recommend?
>
> Mohamed.
>
>
> On Wed, Jul 31, 2024 at 4:00 AM Alex Balashov 
> <abalashov at evaristesys.com> wrote:
>
>     Hi,
>
>     The Request URI is a SIP concept, while the destination URI might
>     be best described as a fictive invention of OpenSIPS configuration
>     script. It represents the next-hop destination to which the
>     request will be forwarded on the network and transport layer, as
>     you correctly surmised, while the request URI is a logical
>     destination. The destination URI supersedes the request URI, but
>     if the destination URI is not set, the domain/port/transport
>     attributes of the request URI are consumed to determine the
>     forwarding destination.
>
>     An RURI is not the same thing as an Address of Record; an AoR
>     refers to a logical URI entity in the location service (registrar)
>     context. The purpose of a registrar is to map an AoR (such as
>     sip:mohamed at sip.opensips.org
>     <mailto:sip%3Amohamed at sip.opensips.org>) to one or more Contact
>     URIs (e.g. sip:line1 at 192.168.1.100
>     <mailto:sip%3Aline1 at 192.168.1.100>;user=phone), which indicate how
>     to reach a given device on the network and transport layer.
>
>     Hopefully that helps!
>
>     -- Alex
>
>     > On Jul 30, 2024, at 9:26 PM, Mohamed OUALLA
>     <oualla.simohamed at gmail.com> wrote:
>     >
>     > Hello all,
>     >
>     >   I have a technical question about the difference between
>     Request URI and Destination URI in SIP. In my understanding of
>     SIP, the R-URI (Request URI) is located in the start line of the
>     SIP request and is also known as the Address of Record (AoR).
>     However, I am unclear about what the Destination URI is for
>     openSIPs. Is it the same as the Request URI, or is it related to
>     an added route header, or the destination address in the transport
>     protocol, I am not sure about it?
>     >
>     >   Additionally, I have observed that when I change the $du
>     pseudo variable in OpenSIPS, it relays the request to the UAS
>     without changing the R-URI (change it with the sip uri I gave to
>     $du pseudo variable). This behavior is the same as using the
>     t_relay() method, which also does not change the R-URI but sends
>     the request to the UAS. I guess that changes have been done only
>     for the destination address in the transport layer.
>     >
>     >   Could someone please explain these observations and clarify
>     the difference between R-URI and Destination URI?
>     >   And the best way to route calls from UAC to UAS in simple VoIP
>     call components (Caller - SIP Proxy - Callee), actually I change
>     the $ru, then I forward() the request stateless or t_relay() stateful.
>     >
>     > Thank you.
>     > _______________________________________________
>     > Users mailing list
>     > Users at lists.opensips.org
>     > http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
>     -- 
>     Alex Balashov
>     Principal Consultant
>     Evariste Systems LLC
>     Web: https://evaristesys.com
>     Tel: +1-706-510-6800
>
>
>     _______________________________________________
>     Users mailing list
>     Users at lists.opensips.org
>     http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
>
>
> -- 
> ==============================
> Mohamed OUALLA
> *VoIP Technical Solutions and Software Engineer*
> Mail: oualla.simohamed at gmail.com
> N.Phone: +212 6 29 19 3116
> <mailto:oualla.simohamed at gmail.com>*SSC Certified Professional*
> ==============================
>
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opensips.org/pipermail/users/attachments/20240806/547de466/attachment.html>