> If you need to stop the retransmission, a 100 trying should be sent instead of 200ok. Can you reconfigure the next hop to do that? Or is it out of your control?

Looks it is difficult to do this as Kamailio Proxy forks via append_branch() incoming SIP PUBLISH to all Presence Servers.

I do not understand what is difficult, to configure the next hop application to send 100 trying? Or maybe you can provide a diagram of how sip traffic is routed on your case.

And even if Presence Server answers 200 OK, the Kamailio Proxy still sends a repeated SIP PUBLISH there within the fr timer.

This remark is also not clear, is the 200ok handled by Kamailio, sent upstream, but then Kamailio still resends the PUBLISH?

Cheers,
Daniel

чт, 4 февр. 2021 г. в 13:04, Daniel-Constantin Mierla <miconda@gmail.com>:

Hello,

if the 200ok is consumed by tm, it will destroy the transaction very soon. I am not sure this is a good path to go.

If you need to stop the retransmission, a 100 trying should be sent instead of 200ok. Can you reconfigure the next hop to do that? Or is it out of your control?

Cheers,
Daniel

On 04.02.21 11:47, Denys Pozniak wrote:

Hello!

In the configuration below Kamailio Proxy creates a transaction for the SIP PUBLISH to get info from the HTTP server in async mode.

But before creating a transaction, a synthetic 200 OK is sent, so that I need somehow to drop the real 200 OK from the upstream Presence Server.

If drop 200 OK in reply_route, tm module starts to retransmit.

Those it is necessary that the 200 OK be consumed by the tm module, but does not go further.

if ( !is_method("PUBLISH") ) {

        sl_send_reply("200", "Ok");
        t_newtran();

        $http_req(suspend) = 1;
         http_async_query("$var(url)", "CALLBACK");

}

route[CALLBACK] {

        <some header manipulation>

        t_on_reply("PUBLISH_REPLY");
        route(RELAY);
        exit;

}

onreply_route[PUBLISH_REPLY] {
        if ( t_check_status("200") ) {
                drop; # Does not work!!!
        }
}

Any advice is appreciated

--

BR,

Denys Pozniak

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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Funding: https://www.paypal.me/dcmierla

--

BR,

Denys Pozniak

-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Funding: https://www.paypal.me/dcmierla