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<tt>Hi Rahul,<br>
<br>
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.<br>
This is why the headers do not propagate.<br>
<br>
What kind of headers are looking to be passed further ?<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="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
<div class="moz-cite-prefix">On 06.05.2015 20:45, Gupta, Rahul
wrote:<br>
</div>
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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>
<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>
</div>
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