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Hi Razvan,</div>
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Many thanks for your advice.</div>
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Yes, I can confirm the branch_route did the trick.</div>
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--</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Regards,</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
William Jin<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Users <users-bounces@lists.opensips.org> on behalf of Răzvan Crainea <razvan@opensips.org><br>
<b>Sent:</b> Wednesday, 10 June 2020 5:59 PM<br>
<b>To:</b> users@lists.opensips.org <users@lists.opensips.org><br>
<b>Subject:</b> Re: [OpenSIPS-Users] question about rtpengine_manage() in failure_route</font>
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<p>Hi, William!</p>
<p><br>
</p>
<p>Make sure you call rtpengine_manage() in branch route, not in the request route, otherwise all the changes will be inherited throughout all the branches further created.</p>
<p><br>
</p>
<p>Best regards,</p>
<p>Răzvan</p>
<p><br>
</p>
<div class="x_moz-cite-prefix">On 6/9/20 7:04 AM, William Jin wrote:<br>
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<span>Below is a short config example.</span></div>
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<span><br>
</span></div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span>route {<br>
</span>
<div>...<br>
</div>
<div>setflag(CallFWD);<br>
</div>
<div>rtpengine_manage(); #say the first call attempt need rtpengine<br>
</div>
<div>t_on_failure("handle_failure");<br>
</div>
<div>r_relay();<br>
</div>
<div>...<br>
</div>
<div>}<br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>failure_route[handle_failure] {<br>
</div>
<div>...<br>
</div>
<div>if (isflagset(CallFWD)){route(handle_callfwd);}<br>
</div>
<div>...<br>
</div>
<div>}<br>
</div>
<div><br>
</div>
<div>route[handle_callfwd]{<br>
</div>
<div>...<br>
</div>
<div>xlog("L_INFO","RB=$rb(application/sdp)");<br>
</div>
<div>if (t_relay()){<br>
</div>
<div>xlog("L_INFO","Stateful relay done. RB=$rb(application/sdp)");<br>
</div>
<div>}<br>
</div>
<div>...<br>
</div>
<span>}</span><br>
</div>
<div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Looks like the t_relay in the handle_callfwd will inherit the SDP info that rtpengine_manage entered in the first attempt.</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Also, another interesting fact is that the SDP info is added while the t_relay is called. Looks like the t_relay is using its data in memory and re-write the SDP. the <span style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline!important">$rb(application/sdp)
is not changed until the t_relay is called.</span></div>
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<br>
</div>
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<div style="margin:0px; font-size:12pt; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255)">
How can I, for example, remove the rtpengine related SDP for the second INVITE generated by the failure_route? </div>
<div style="margin:0px; font-size:12pt; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255)">
I tried rtpengine_delete() in handle_callfwd or rtpengine_manage() in the failure_route which suppose to do rtpengine_delete also, but they don't work as expected.</div>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Thanks in advance.</div>
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<br>
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<br>
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--</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Regards,</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
William Jin<br>
</div>
</div>
</div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Users
<a class="x_moz-txt-link-rfc2396E" href="mailto:users-bounces@lists.opensips.org">
<users-bounces@lists.opensips.org></a> on behalf of William Jin <a class="x_moz-txt-link-rfc2396E" href="mailto:williamj@exetel.com.au">
<williamj@exetel.com.au></a><br>
<b>Sent:</b> Tuesday, 9 June 2020 9:09 AM<br>
<b>To:</b> OpenSIPS users mailling list <a class="x_moz-txt-link-rfc2396E" href="mailto:users@lists.opensips.org">
<users@lists.opensips.org></a><br>
<b>Subject:</b> [OpenSIPS-Users] question about rtpengine_manage() in failure_route</font>
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Hi All</div>
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May I know how can I rewrite the SDP (rtpengine) in the failure route?</div>
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<br>
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The scenario is we use rtpengine_manage() in the first call attempt, if it fails, it uses failure_route, however, we want to change the SDP info.</div>
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<br>
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For example, the call's first attempt is to an ipv6 UAC, when failed, we try ipv4 UAC. We need to change the rtpengine address-family to IP4 so the c= line can follow with an IPv4 address.</div>
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<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
We tried to use rtpengine_manage("address-family=IP4"), but looks like the SDP still not changed.</div>
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<br>
</div>
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Does anyone have any idea about this? Or is there any other way to achieve this?</div>
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<br>
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<br>
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<br>
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--</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Regards,</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
William Jin<br>
</div>
</div>
</div>
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