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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black;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";color:black"><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>
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<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>
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