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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hello Luis,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">as the 1xx responses are usually send unreliable (unless you use PRACK), you should not make any assumption on the order or even the arrival of this messages. It can also happens on
a network level, if send by UDP.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Can you elaborate why you think this re-ordering is a problem for you?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">One idea to enforce some ordering would be to use the dialog module in combination with reply routes and the textops(x) module.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">About the shared memory question – Kamailio implement its own memory manager (private memory and shared memory pool).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Henning<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">-- <o:p>
</o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Henning Westerholt –
</span><span style="mso-fareast-language:EN-US"><a href="https://skalatan.de/blog/"><span lang="EN-GB" style="color:#0563C1">https://skalatan.de/blog/</span></a></span><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Kamailio services –
</span><span style="mso-fareast-language:EN-US"><a href="https://gilawa.com/"><span lang="EN-GB" style="color:#0563C1">https://gilawa.com</span></a></span><span style="mso-fareast-language:EN-US">
<span lang="EN-GB"><o:p></o:p></span></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:35.4pt"><b>From:</b> sr-users <sr-users-bounces@lists.kamailio.org>
<b>On Behalf Of </b>Luis Rojas G.<br>
<b>Sent:</b> Tuesday, April 7, 2020 10:43 PM<br>
<b>To:</b> sr-users@lists.kamailio.org<br>
<b>Subject:</b> [SR-Users] Kamailio propagates 180 and 200 OK OUT OF ORDER<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
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<p style="margin-left:35.4pt">Good day,<o:p></o:p></p>
<p style="margin-left:35.4pt">I am testing the dispatcher module, using Kamailio as stateless proxy. I have a pool of UAC (scripts in SIPP) and a pool of UAS (also scripts in SIPP) for the destinations. Kamailio version is kamailio-5.3.3-4.1.x86_64.<o:p></o:p></p>
<p style="margin-left:35.4pt">Problem I have is, if UAS responds 180 and 200 OK to Invite immediately, sometimes they are propagated out of order. 200 OK before 180, like this :<o:p></o:p></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt">
<img border="0" width="597" height="209" style="width:6.2187in;height:2.177in" id="_x0000_i1025" src="cid:image001.png@01D60D84.49317330"><o:p></o:p></p>
<p style="margin-left:35.4pt">UAS is 172.30.4.195:5061. UAC is 172.30.4.195:5080. Kamailio is 192.168.253.4:5070<o:p></o:p></p>
<p style="margin-left:35.4pt">Difference between 180 and 200 is just about 50 microseconds.
<o:p></o:p></p>
<p style="margin-left:35.4pt">My guess is that both messages are received by different instances of Kamailio, and then because of context switches, even though the 180 is received before, that process ends after the processing of 200. However, I had the idea
that in order to avoid these problems the kamailio processes synchronized with each other using a shared memory. I tried using stateful proxy and I obtained the same result.<o:p></o:p></p>
<p style="margin-left:35.4pt">By the way, anyone has any idea about how Kamailio's share memory is implemented? It clearly does not use the typical system calls shmget(), shmat(), because they are not shown by ipcs command.<o:p></o:p></p>
<p style="margin-left:35.4pt">Before posting here I googled, but I couldn't find anything related to this. I can't believe I am the only one who ever had this problem, so I guess I am doing something wrong...<o:p></o:p></p>
<p style="margin-left:35.4pt">Please, any help. I'm really stuck on this.<o:p></o:p></p>
<p style="margin-left:35.4pt">Thanks.<o:p></o:p></p>
<pre style="margin-left:35.4pt">-- <o:p></o:p></pre>
<pre style="margin-left:35.4pt">Luis Rojas<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Software Architect<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Sixbell<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Los Leones 1200<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Providencia<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Santiago, Chile<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Phone: (+56-2) 22001288<o:p></o:p></pre>
<pre style="margin-left:35.4pt"><a href="mailto:luis.rojas@sixbell.com">mailto:luis.rojas@sixbell.com</a><o:p></o:p></pre>
<pre style="margin-left:35.4pt"><a href="http://www.sixbell.com">http://www.sixbell.com</a><o:p></o:p></pre>
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<pre style="margin-left:35.4pt">-- <o:p></o:p></pre>
<pre style="margin-left:35.4pt">Luis Rojas<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Software Architect<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Sixbell<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Los Leones 1200<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Providencia<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Santiago, Chile<o:p></o:p></pre>
<pre style="margin-left:35.4pt">Phone: (+56-2) 22001288<o:p></o:p></pre>
<pre style="margin-left:35.4pt"><a href="mailto:luis.rojas@sixbell.com">mailto:luis.rojas@sixbell.com</a><o:p></o:p></pre>
<pre style="margin-left:35.4pt"><a href="http://www.sixbell.com">http://www.sixbell.com</a><o:p></o:p></pre>
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