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<p class="MsoNormal"><span style="color:#1F497D">Hi Bogdan,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I want to use opensips as stateless proxy that’s why I tried forward() which is causing the branch issue as shown below, the branch in both the Via headers are same.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">CANCEL sip:XXXX@IP:PORT SIP/2.0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">From: "Alan Altman[3004]"<sip:YYYY@IP:PORT>;tag=389cc678-0-13c4-65014-16288-3d1c9b70-16288<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">To: <sip:XXXX@IP:PORT><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Call-ID: 10589b68-0-13c4-65014-16288-156334b2-16288<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">CSeq: 1 CANCEL<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Via: SIP/2.0/UDP IP:PORT;branch=z9hG4bK-16288-568e507-60d8e02-38903830<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Via: SIP/2.0/UDP IP:PORT;branch=z9hG4bK-16288-568e507-60d8e02-38903830<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Reason: SIP;cause=200;text="User Release"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Max-Forwards: 69<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Supported: timer,replaces,from-change,histinfo,answermode,eventlist,recipient-list-subscribe<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">User-Agent: test user agent<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Content-Length: 0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">X-testHeader: RAHUL<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">If we use t_relay(), I want to forward X-testHeader to the endpoint.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> Bogdan-Andrei Iancu [mailto:bogdan@opensips.org]
<br>
<b>Sent:</b> Thursday, May 07, 2015 12:39 PM<br>
<b>To:</b> OpenSIPS users mailling list; Gupta, Rahul<br>
<b>Subject:</b> Re: [OpenSIPS-Users] CANCEL in t_relay() not forwarding user defined Headers<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><tt><span style="font-size:10.0pt">Hi Rahul,</span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br>
<br>
<tt>As per RFC3261, the stateful CANCELs are hop-by-hop - which means each hop consumes the incoming CANCEL and generates a new one for the next hop.</tt><br>
<tt>This is why the headers do not propagate.</tt><br>
<br>
<tt>What kind of headers are looking to be passed further ?</tt><br>
<br>
<tt>Regards,</tt><br>
<br>
</span><o:p></o:p></p>
<pre>Bogdan-Andrei Iancu<o:p></o:p></pre>
<pre>OpenSIPS Founder and Developer<o:p></o:p></pre>
<pre><a href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a><o:p></o:p></pre>
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<p class="MsoNormal">On 06.05.2015 20:45, Gupta, Rahul wrote:<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";background:white">I am using opensips as a proxy, when a CANCEL to an INVITE comes in, its processed as follows<span class="apple-converted-space"> </span></span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""><br>
<br>
<span style="background:white"> # CANCEL processing<span class="apple-converted-space"> </span></span><br>
<span style="background:white"> if (is_method("CANCEL"))<span class="apple-converted-space"> </span></span><br>
<span style="background:white"> {<span class="apple-converted-space"> </span></span><br>
<span style="background:white"> if (t_check_trans())<span class="apple-converted-space"> </span></span><br>
<span style="background:white"> t_relay();<span class="apple-converted-space"> </span></span><br>
<span style="background:white"> exit;<span class="apple-converted-space"> </span></span><br>
<span style="background:white"> }<span class="apple-converted-space"> </span></span><br>
<br>
<span style="background:white">in t_relay() seems like its creating new transaction for CANCEL and forwarding to the destination. However its not copying user-defined Headers which comes as a part of CANCEL. Is there a way to forward the other Headers ?<span class="apple-converted-space"> </span></span><br>
<br>
<span style="background:white">I also tried using forward(). In this case, all the headers are getting forwarded, however, the branch in Via header is getting duplicated from the incoming VIA header which is causing issues with the endpoint.<span class="apple-converted-space"> </span></span><br>
<br>
<span style="background:white">Question 1) If I use t_realy() for CANCEL, then how do I forward user defined Headers ?<span class="apple-converted-space"> </span></span><br>
<span style="background:white">Question 2) If I use forward() for CANCEL, then how do I get the Via Header with proper branch as created in INVITE ?<span class="apple-converted-space"> </span></span></span><o:p></o:p></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:gray">------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
<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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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
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