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<p>Hello,</p>
<p>you should be able to disable sending internal replies inside tm
in case of t_relay() failure with:</p>
<p> *
<a class="moz-txt-link-freetext" href="https://www.kamailio.org/docs/modules/stable/modules/tm.html#tm.f.t_set_disable_internal_reply">https://www.kamailio.org/docs/modules/stable/modules/tm.html#tm.f.t_set_disable_internal_reply</a></p>
<p>The to handling in the IF branch of t_relay() execution if it
returns false. There is no need to use event_route from sl module
in this case.<br>
</p>
<p>Cheers,<br>
Daniel<br>
</p>
<div class="moz-cite-prefix">On 27.11.20 09:41, Henning Westerholt
wrote:<br>
</div>
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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">any comment on this
topic? Would be great to get an opinion at least on the
first question, then I could document it or open an issue
for it.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Henning<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-GB">-- <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Henning Westerholt – </span><a
href="https://skalatan.de/blog/" moz-do-not-send="true"><span
lang="EN-GB">https://skalatan.de/blog/</span></a><span
lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Kamailio services – </span><a
href="https://gilawa.com/" moz-do-not-send="true"><span
lang="EN-GB">https://gilawa.com</span></a>
<span lang="EN-GB"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" style="margin-left:35.4pt"><b><span
style="mso-fareast-language:DE">From:</span></b><span
style="mso-fareast-language:DE"> Henning Westerholt
<br>
<b>Sent:</b> Wednesday, November 25, 2020 6:53 PM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List
<a class="moz-txt-link-rfc2396E" href="mailto:sr-users@lists.kamailio.org"><sr-users@lists.kamailio.org></a><br>
<b>Cc:</b> Kamailio (SER) - Development Mailing List
<a class="moz-txt-link-rfc2396E" href="mailto:sr-dev@lists.kamailio.org"><sr-dev@lists.kamailio.org></a><br>
<b>Subject:</b> handling of locally generated 478 errors<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:35.4pt">Hello,<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">I want to ask for your opinion on the best
approach regarding the handling of locally generated 478
errors.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">To give an example, like the ones generated
from TM during t_relay() on an unresolvable destination.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
style="font-size:10.5pt;font-family:"Segoe
UI",sans-serif;mso-fareast-language:DE" lang="EN-GB">Nov
25 17:40:13 kamailio[19345]: ERROR: {28607414 INVITE
bba500ac-a9df-1239-6693-00505682c04d} tm [ut.h:286]:
uri2dst2(): failed to resolve "invalid.skalatan.de"
:unresolvable A or AAAA request (-7)<br>
Nov 25 17:40:13 kamailio[19345]: ERROR: {28607414 INVITE
bba500ac-a9df-1239-6693-00505682c04d} tm [t_fwd.c:1738]:
t_forward_nonack(): failure to add branches<br>
Nov 25 17:40:13 kamailio[19345]: CRITICAL: {28607414 INVITE
bba500ac-a9df-1239-6693-00505682c04d} rtpengine
[../../core/parser/../ip_addr.h:658]: ip_addr2sbuf():
unknown address family 0<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">These errors will not show up in onreply or
failure_route. A long time ago this was discussed on the
list [1], as some functionality were phased out out that
support these scenarios.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">Kamailio will try to generate a 478 with TM,
this will obviously fail as well, and then generate a 478
with SL.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">Question 1)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">Is this intentional that the internally
generated 478 is not showing up in the failure_route, like
for for 408? This has been tested several times, but it is a
complicated configuration.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">Question 2)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">Are there any other (better) ideas how to
handle that besides using a “event_route[sl:local-response]”
to catch this, e.g. to tear down otherwise stale rtpengine
sessions etc..? As a side note,
event_route[tm:local-response] seems not to work as well
because of the tm failure.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">Henning<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">[1] <a
href="https://lists.kamailio.org/pipermail/sr-users/2011-June/069020.html"
moz-do-not-send="true">
https://lists.kamailio.org/pipermail/sr-users/2011-June/069020.html</a><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">-- <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">Henning Westerholt –
</span><a href="https://skalatan.de/blog/"
moz-do-not-send="true"><span lang="EN-GB">https://skalatan.de/blog/</span></a><span
lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB">Kamailio services –
</span><a href="https://gilawa.com/" moz-do-not-send="true"><span
lang="EN-GB">https://gilawa.com</span></a>
<span lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span
lang="EN-GB"><o:p> </o:p></span></p>
</div>
<br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
Kamailio (SER) - Users Mailing List
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Funding: <a class="moz-txt-link-freetext" href="https://www.paypal.me/dcmierla">https://www.paypal.me/dcmierla</a></pre>
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