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<p class="MsoNormal"><span style="font-size:11.0pt">Bogdan,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">That is good to know, but if that is the case then can you see any reason why the ACK would not be recognized? I am trying to gather debug logs from OpenSIPS for an occurrence but it is very intermittent.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Out of curiousity, what functionality is the “i” param being inserted for?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Ben Newlin </span>
<span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">Bogdan-Andrei Iancu <bogdan@opensips.org><br>
<b>Date: </b>Tuesday, March 26, 2019 at 3:27 AM<br>
<b>To: </b>OpenSIPS users mailling list <users@lists.opensips.org>, Ben Newlin <Ben.Newlin@genesys.com><br>
<b>Subject: </b>Re: [OpenSIPS-Users] Bad ACK to negative reply<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><tt><span style="font-size:10.0pt">Hi Ben,</span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br>
<br>
<tt>OpenSIPS, when doing transaction matching with VIA hdr, is checking the branch, transport, host and port parts only , so the "i" param will be ignored.</tt><br>
<br>
<tt>Regards,</tt><br>
<br>
</span><o:p></o:p></p>
<pre>Bogdan-Andrei Iancu<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>OpenSIPS Founder and Developer<o:p></o:p></pre>
<pre> <a href="https://www.opensips-solutions.com">https://www.opensips-solutions.com</a><o:p></o:p></pre>
<pre>OpenSIPS Summit 2019<o:p></o:p></pre>
<pre> <a href="https://www.opensips.org/events/Summit-2019Amsterdam/">https://www.opensips.org/events/Summit-2019Amsterdam/</a><o:p></o:p></pre>
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<p class="MsoNormal">On 03/22/2019 04:34 PM, Ben Newlin wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Hi,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I am seeing some strange behavior handling hop-by-hop ACKs to negative replies. A trace of my scenario can be found here:
<a href="https://pastebin.com/Ve8rnYnu">
https://pastebin.com/Ve8rnYnu</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The problem is that intermittently the OpenSIPS instance receiving the ACK is not recognizing. t_check_trans is returning false for this ACK.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The only thing I can see I that the Via header in the ACK is not the same as in the INVITE, which is required by the RFC. The ACK is missing the “i=03ba9232” parameter that was on the Via for the initial INVITE.
This parameter was not on the initial INVITE and is being added by the OpenSIPS instance that is forwarding the INVITE. What is this parameter for? Shouldn’t it be included on the ACK? Can anyone see any other reason the ACK would not match?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Ben Newlin </span>
<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><br>
<br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Users mailing list<o:p></o:p></pre>
<pre><a href="mailto:Users@lists.opensips.org">Users@lists.opensips.org</a><o:p></o:p></pre>
<pre><a href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><o:p></o:p></pre>
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<br>
<o:p></o:p></span></p>
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