[OpenSIPS-Users] Opensips and rtpengine_play_media not absorbing ACK

Mon Nov 6 20:54:11 UTC 2023

I tried updating from Opensips 3.2 to Opensips 3.4.2 as I saw that there
was some re-invite fixes.  Still doesn't seem to resolve this issue.  What
am I missing to handle this correctly?

Thank you.

Kevin

On Fri, Nov 3, 2023 at 12:51 PM Kevin Kennedy <kennedy4260 at gmail.com> wrote:

> Dmitry,
> Thank you for your response, it does appear to work this way and is
> absorbing the ACK now, but when a Re-INVITE happens, it responds correctly
> with the updated Cseq in the 100 Trying, but the 200 OK (using the
> t_reply_with_body), still has the same Cseq as the initial INVITE.  How can
> I make adjustments for this?
>
> Thank you.
>
> Kevin
>
> On Fri, Nov 3, 2023 at 5:10 AM Dmitry Ponomaryov <iamhalje at gmail.com>
> wrote:
>
>> It turns out that this is no early_media, there were simply successful
>> attempts with 183 Session Progress, which is why there was such a
>> misunderstanding, I’ll attach the snippet code again in plain text:
>> route { if (is_method("INVITE")) { create_dialog(); route(media); exit;
>> } } route[media] { if (has_body("application/sdp")) { rtpengine_offer();
>> } $json(reply) := $rtpquery;
>> $var(port)=$json_pretty(reply/tags/$ft/medias[0]/streams[0]/local port);
>> remove_body_part(); append_to_reply("Contact:
>> <sip:$rU@$socket_in(ip):$socket_in(port);transport=udp;did=$DLG_did>\r\n");
>>
>> append_to_reply("Content-Type: application/sdp\r\n"); $var(body) =
>> $(rb{re.subst,/(IP4.).*/\1$socket_in(ip)/g}); $var(body) =
>> $(var(body){re.subst,/(audio.)...../\1$var(port)/g});
>> t_reply_with_body(200, "OK", $var(body));
>> rtpengine_play_media("call-id=$ci from-tag=$ft
>> file=/etc/rtpengine/media.wav"); async(sleep(10), after_media); }
>> route[after_media] { if (t_was_cancelled()) { rtpengine_delete(); exit;
>> } else { rtpengine_delete(); sl_send_reply(486,"Busy here"); exit; } }
>>
>> and pined previous posts below :)
>>
>> > ----------------------------------------------------------------------
>> > Message: 2
>> > Date: Fri, 3 Nov 2023 16:00:22 +0500
>> > From: Dmitry Ponomaryov<iamhalje at gmail.com>
>> > To:users at lists.opensips.org
>> > Subject: Re: [OpenSIPS-Users] Opensips and rtpengine_play_media not
>> >       absorbing ACK
>> > Message-ID:<3971cbc2-7281-2299-4212-7f241e8b8b5a at gmail.com>
>> > Content-Type: text/plain; charset="utf-8"; Format="flowed"
>> >
>> > Hello everyone, I would like to show my part of the code when playing
>> > early media after 200OK, when creating dialogs, I substituted $DLG_did
>> > in the contact of my dialog, and received the same $DLG_did for my
>> > dialog in ACK, but OpenSIPS also continued to send 200OK , despite
>> > having already received an ACK response.
>> >
>> > route {
>> >
>> > # initial invite
>> >
>> > if (is_method("INVITE")) {
>> >
>> > create_dialog();
>> >
>> > route(early_media);
>> >
>> > exit;
>> >
>> > }
>> >
>> > } route[early_media] { if (has_body("application/sdp")) {
>> > rtpengine_manage(); } $json(reply) := $rtpquery;
>> > $var(port)=$json_pretty(reply/tags/$ft/medias[0]/streams[0]/local port);
>> > remove_body_part();
>> >
>> > append_to_reply("Contact:
>> > <sip:$rU@
>> $socket_in(ip):$socket_in(port);transport=udp;did=$DLG_did>\r\n");
>> >
>> > append_to_reply("Content-Type: application/sdp\r\n"); $var(body) =
>> > $(rb{re.subst,/(IP4.).*/\1$socket_in(ip)/g}); $var(body) =
>> > $(var(body){re.subst,/(audio.)...../\1$var(port)/g});
>> > t_reply_with_body(200, "OK", $var(body));
>> > rtpengine_play_media("call-id=$ci from-tag=$ft
>> > file=/etc/rtpengine/media.wav"); async(sleep(10), after_early_media); }
>> > route[after_early_media] { if (t_was_cancelled()) { rtpengine_delete();
>> > exit; } else { rtpengine_delete(); sl_send_reply(486,"Busy here"); exit;
>> > } }
>> >
>> > I don’t know if Kevin example was with creating a dialog, but I also
>> > noticed this problem through transaction... thanks
>> > -------------- next part --------------
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>> >
>> > ----------------------------------------------------------------------
>> >
>> > Message: 1
>> > Date: Thu, 2 Nov 2023 16:32:02 -0700
>> > From: Kevin Kennedy<kennedy4260 at gmail.com>
>> > To: OpenSIPS users mailling list<users at lists.opensips.org>
>> > Subject: [OpenSIPS-Users] Opensips and rtpengine_play_media not
>> >       absorbing ACK
>> > Message-ID:
>> >       <
>> CABDXsRxLTp2_uEX_UPX1adg16af6gaetzJujUTPki8c7H3KKLQ at mail.gmail.com>
>> > Content-Type: text/plain; charset="utf-8"
>> >
>> > I am trying to build a solution where Opensips 3.2+ with RTPengine acts
>> as
>> > a UAC, answers a call with 200OK, plays media from file, and will
>> terminate
>> > the call right after playing announcement.
>> >
>> > Opensips is responding with 200OK with SDP body and making the
>> > correct changes for the IP, but when the ACK comes back from the UAS,
>> > Opensips doesn't seem to absorb it and retransmits the 200OK.
>> >
>> > Code snippet handling this scenario
>> >
>> >          rtpengine_manage("from-tag=$ft replace-session-connection
>> > trust-address replace-origin codec-strip-g729",,$var(body));
>> >          append_to_reply("Contact:<sip:$socket_out>\r\n");
>> >          append_to_reply("Content-Type: application/sdp\r\n");
>> >          t_reply_with_body(200, "OK", $var(body));
>> >          rtpengine_play_media("from-tag=$ft
>> > file=/etc/rtpengine/unk_num.wav");
>> >          sleep(10);
>> >          rtpengine_delete("from-tag=$ft");
>> >          #t_reply(603, "Decline");
>> >          exit();
>> >
>> >
>> > What do I need to add to handle this scenario correctly?
>> >
>> > Note:  I was able to get this to work with Early Media (183
>> > reply_with_body, and send t_reply(603, "Decline")), but we have
>> customers
>> > using late media invite as well, so the Early Media option wouldn't
>> work in
>> > that case.
>> >
>> > Thank you.
>> >
>> > Kevin Kennedy
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>> >
>> > ------------------------------
>> >
>>
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