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<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Thanks guys! I was definitely just going off the default logging calls saying “new branch to xxx” in MANAGE_BRANCH. I am not intentionally creating separate branches in my config, so
I guess it must be 1 branch! Good to know. Branches is another topic I still need to learn a lot more about.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Hopefully I can come up with the right config. I will keep working on it and let you know how I go.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Rhys.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">sr-users <sr-users-bounces@lists.kamailio.org> on behalf of Matthias Urlichs <matthias@urlichs.de><br>
<b>Reply to: </b>"Kamailio (SER) - Users Mailing List" <sr-users@lists.kamailio.org><br>
<b>Date: </b>Friday, 4 March 2022 at 2:01 am<br>
<b>To: </b>"sr-users@lists.kamailio.org" <sr-users@lists.kamailio.org><br>
<b>Subject: </b>Re: [SR-Users] rtpengine - SRTP <> RTP missing a=crypto<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On 03.03.22 14:47, Rhys Hanrahan wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-GB">Yes, from what I’ve seen in the logs there are multiple branches happening. One between Teams and Kamailio and one between Kamailio and Asterisk.</span><o:p></o:p></p>
</blockquote>
<p>That's just one branch; the incoming call doesn't count. "Real" additional branches are created by calling functions like "append_branch".<o:p></o:p></p>
<p>You should definitely ensure (by adding appropriate logging calls) that "rtpengine_manage" is called exactly once per outgoing application/sdp message, with all requisite arguments(*). Anything else is a recipe for confusion. In my experience that's sufficient(**)
to get it all working quite nicely.<o:p></o:p></p>
<p>(*) "trust-address replace-origin replace-session-connection", plus either RTP/AVP or RTP/SAVP<o:p></o:p></p>
<p>(**) unless the opposite end is broken. Right now, for instance, talking to Zoom Europe requires a heap of "SDES-no-RANDOM_CRYPTO_ALGORITHM" arguments, for both incoming and outgoing calls. Discovering that fix was decidedly nontrivial.<o:p></o:p></p>
<pre>-- <o:p></o:p></pre>
<pre>-- regards<o:p></o:p></pre>
<pre>-- <o:p></o:p></pre>
<pre>-- Matthias Urlichs<o:p></o:p></pre>
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