I agree here, the 183 must be relayed back to the original caller (which generate the received INVITE) and let it do the PRACK - this confirmation must be end-2-end in the dialog.

Regards,

Bogdan-Andrei Iancu

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

On 12.02.2024 11:36, Ihor Olkhovskyi wrote:
You should relay 183 to original source (ione that is sending INVITE) and got PRACK from there.
That would be the most correct way of handling this

Le lun. 12 févr. 2024 à 02:29, Social Boh <soc...@bohboh.info> a écrit :

    Maybe someone can help me.

    This is the scenario.

    OpenSIPs receive a INVITE and send it to a server that reply with
    a 302
    message (always)

    Then OpenSIPs, in the failure route, take the user part present in
    the
    302 contact header, change the destination IP and send with t_relay

    The destination reply with a 183 with Require: 100rel header so
    OpenSIPs
    have to reply with a PRACK. This is my problem.

    I don't know which is the best way to handle this (the PRACK)

    Thank you

    Regards

    ---
    I'm SoCIaL, MayBe

    El 9/02/2024 a las 6:46 a. m., Social Boh escribió:
    > Hello list,
    >
    > can OpenSIPs generate a PRACK message to reply a 180/183 message?
    >
    > Thank you
    >
    > Regards
    >
    > ---
    > I'm SoCIaL, MayBe
    >
    >
    > _______________________________________________
    > Users mailing list
    > Users@lists.opensips.org
    > http://lists.opensips.org/cgi-bin/mailman/listinfo/users

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--
Best regards,
Ihor (Igor)

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