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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">Certainly. I was going to ask next if that would be a better place to report the issue.<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 have opened an issue here: https://github.com/OpenSIPS/opensips/issues/1555<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>Friday, December 7, 2018 at 12:16 PM<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] UAC module causing malformed CANCEL<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>Thanks for the report - could you please open a bug report on GITHUB with the relevant information ? It will be easier for us to track it.</tt><br>
<br>
<tt>Best 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 12/05/2018 05:17 PM, Ben Newlin wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Hello,</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 have found an issue with using the UAC module to replace the From/To headers. When one of these headers is the last header in a SIP INVITE, the UAC module is injecting an extra line break in subsequent CANCEL
requests causing an invalid request. This happens when either of these headers are the last header in the originally received INVITE, but also if they become the last header due to modifications made to the original INVITE, e.g. if the last 2 headers were
To followed by P-Asserted-Identity and the script processing calls remove_hf(“P-Asserted-Identity”) thus making the To header last.</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 have only seen this happen on a CANCEL request. Other sequential requests like BYE or re-INVITE are not malformed.</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">A tcpdump capture of the message sequence can be found here:
<a href="https://pastebin.com/myDVU5Jz">
https://pastebin.com/myDVU5Jz</a>. Note the extra whitespace line in the second CANCEL message forwarded from OpenSIPS (203.0.113.3).</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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