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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="moz-cite-prefix">On 6/9/20 7:04 AM, William Jin wrote:<br>
</div>
<blockquote type="cite"
cite="mid:SG2PR06MB2409E6637F569783051D3B6C9B820@SG2PR06MB2409.apcprd06.prod.outlook.com">
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<span>Below is a short config example.</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
<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>
<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);">
<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>
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
Thanks in advance.</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);">
<br>
</div>
<div id="Signature">
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
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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>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b> Users
<a class="moz-txt-link-rfc2396E" href="mailto:users-bounces@lists.opensips.org"><users-bounces@lists.opensips.org></a> on behalf of William
Jin <a class="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="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>
<div> </div>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt; color:rgb(0,0,0)">
Hi All</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)">
May I know how can I rewrite the SDP (rtpengine) in the
failure route?</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)">
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>
<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)">
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>
<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)">
We tried to use rtpengine_manage("address-family=IP4"), but
looks like the SDP still not changed.</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)">
Does anyone have any idea about this? Or is there any other
way to achieve this?</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)">
<br>
</div>
<div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div id="x_Signature">
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt; color:rgb(0,0,0)">
--</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>
</div>
<br>
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