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<p class="MsoNormal"><a name="_MailEndCompose"><span lang="EN-GB">Pulled latest 2.3.0 changes, still the same crash
</span></a><span style="mso-bookmark:_MailEndCompose"><span lang="EN-GB" style="font-family:Wingdings">J</span></span><span style="mso-bookmark:_MailEndCompose"><span lang="EN-GB"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span lang="EN-GB"><o:p> </o:p></span></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:black;mso-fareast-language:NL">Met vriendelijke groet,<br>
<br>
</span></span><span style="mso-bookmark:_MailEndCompose"><b><span style="color:#84C41B;mso-fareast-language:NL">Rik Broers</span></b></span><span style="mso-bookmark:_MailEndCompose"><span style="color:black;mso-fareast-language:NL"><br>
</span></span><span style="mso-bookmark:_MailEndCompose"><span style="font-size:9.0pt;color:#212735;mso-fareast-language:NL">Voice Engineer</span></span><span style="mso-bookmark:_MailEndCompose"><span style="color:black;mso-fareast-language:NL"><br>
<br>
</span></span><span style="mso-bookmark:_MailEndCompose"><span lang="EN-GB" style="mso-fareast-language:NL"><o:p></o:p></span></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span lang="EN-GB"><o:p> </o:p></span></span></p>
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<p class="MsoNormal"><b><span style="mso-fareast-language:NL">Van:</span></b><span style="mso-fareast-language:NL"> Users [mailto:users-bounces@lists.opensips.org]
<b>Namens </b>Rik Broers<br>
<b>Verzonden:</b> 12 May 2017 11:28<br>
<b>Aan:</b> OpenSIPS users mailling list <users@lists.opensips.org><br>
<b>Onderwerp:</b> [OpenSIPS-Users] Cancel ACK routing<o:p></o:p></span></p>
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<span style="font-size:9.0pt;font-family:"Segoe UI",sans-serif;color:#212121;mso-fareast-language:NL">Deze afzender heeft onze fraudedetectiecontroles niet doorstaan en gebruikt mogelijk een vals adres. Meer informatie over <a href="http://aka.ms/LearnAboutSpoofing">adresvervalsing</a><o:p></o:p></span></p>
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<span style="font-size:9.0pt;font-family:"Segoe UI",sans-serif;color:#212121;mso-fareast-language:NL"><a href="http://aka.ms/SafetyTipsFeedback">Feedback</a><o:p></o:p></span></p>
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<p class="MsoNormal">Hi!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I’m building a proxy between two public endpoints, so no nat involved luckily.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I’ve got everything to work except for the CANCEL. It breaks the same if I start the call from the other endpoint.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Attached a visual of the traffic flow. Not attached, at link here:
<a href="https://www.dropbox.com/s/m45wwjlt4cmhy7k/Captuasdre.JPG?dl=0">https://www.dropbox.com/s/m45wwjlt4cmhy7k/Captuasdre.JPG?dl=0</a><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">Now I would like to fix the final 487 ACK bouncing, and it seems to me that opensips should just accept the ACK from the 487 and end the transaction.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">The script is based on the standard one after install with some routing logic. So the ACK is handled in the sequential path with this comment:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"># non loose-route, but stateful ACK; must be an ACK after
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"># a 487 or e.g. 404 from upstream server<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">I also tried to fix/workaround it with the topology_hiding module, but as soon as the ACK (packet 12 in the diagram) is sent back opensips crashes with
<br>
CRITICAL:core:free_lump: called on a not free-able lump:0x7f9ba2cc9d68 flags=2<br>
and no 487 is being sent to the left endpoint.<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">version: opensips 2.3.0-beta (x86_64/linux)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">git revision: 2f688b5<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-GB">Crash dump with dbg on for the topo hiding scenario available on request, rather not share it on the list
</span><span lang="EN-GB" style="font-family:Wingdings">J</span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Did I hit an opensips bug or am I missing something?<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">Regards,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="color:black;mso-fareast-language:NL">Met vriendelijke groet,<br>
<br>
</span><b><span style="color:#84C41B;mso-fareast-language:NL">Rik Broers</span></b><span style="color:black;mso-fareast-language:NL"><br>
</span><span style="font-size:9.0pt;color:#212735;mso-fareast-language:NL">Voice Engineer</span><span style="color:black;mso-fareast-language:NL"><br>
<br>
</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:NL"><a href="mailto:rbroers@motto.nl"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:blue">rbroers@motto.nl</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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