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<tt>Hi Ben,<br>
<br>
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.<br>
<br>
Regards,<br>
</tt>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="https://www.opensips-solutions.com">https://www.opensips-solutions.com</a>
OpenSIPS Summit 2019
<a class="moz-txt-link-freetext" href="https://www.opensips.org/events/Summit-2019Amsterdam/">https://www.opensips.org/events/Summit-2019Amsterdam/</a>
</pre>
<div class="moz-cite-prefix">On 03/22/2019 04:34 PM, Ben Newlin
wrote:<br>
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<p class="MsoNormal"><span style="font-size:11.0pt">Hi,<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">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"
moz-do-not-send="true">https://pastebin.com/Ve8rnYnu</a><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">The problem
is that intermittently the OpenSIPS instance receiving the
ACK is not recognizing. t_check_trans is returning false for
this ACK.<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">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?<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">Thanks,<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>
<o:p></o:p></p>
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<br>
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