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Hello,<br>
<br>
Contact header is not used for routing of current message, it is
there to indicate to the receiver where to send back follow up
requests.<br>
<br>
As I can see in the trace you attached, the request URI doesn't have
any transport parameter, which means to use UDP, the transport that
kamailio uses for relaying.<br>
<br>
You can enforce a transport for kamailio, by adding transport
parameter to uri or using some dedicated functions -- see the readme
of tm module.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="moz-cite-prefix">On 17/11/14 23:48, Andrew Mason wrote:<br>
</div>
<blockquote
cite="mid:CANjSGvqfagfLOhST5HrLes=s5EcdbmfcDS8-bq4Ty33LLfsdTg@mail.gmail.com"
type="cite">
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<div>
<div>
<div>Hi All,<br>
<br>
</div>
I am testing SIP messages through the proxy from one client
to another and the sender specifies TCP as the transport but
Kamailio seems to overwrite this and chooses UDP (TCP is
specified in the contact header).<br>
<br>
</div>
The receivers are manually registered using kamctl ul add so i
am not sure if this is forcing UDP or something else - I have
redirected the messages to wireshark and attached an example
of Kamailio adding its VIA headers but specifying UDP (taken
from destination).<br>
<br>
</div>
<div>Basically I am getting TCP to Proxy the UDP from Proxy to
Dest?<br>
</div>
<div><br>
Thanks<br>
</div>
Andrew<br>
<br>
<img alt="Inline images 1"
src="cid:part1.06080609.04090206@gmail.com" height="344"
width="517"><br>
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
<a class="moz-txt-link-freetext" href="http://twitter.com/#!/miconda">http://twitter.com/#!/miconda</a> - <a class="moz-txt-link-freetext" href="http://www.linkedin.com/in/miconda">http://www.linkedin.com/in/miconda</a></pre>
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