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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Karsten,<o:p></o:p></span></p>
<p class="MsoNormal"><span 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">Try this:<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">event_route[tm:local-request] {<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"> if(is_method("OPTIONS")) {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US"> append_hf("Contact: foobar\r\n");<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">}<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">U YYYYY:5060 -> XXXXXX:5060<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">OPTIONS sip:sip.XXXXX.microsoft.com SIP/2.0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Via: SIP/2.0/UDP YYYYY;branch=z9hG4bK20ab.bd499990000000000000000000000000.0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">To: <sip:sip.XXXXX.microsoft.com>.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">From: <sip:dispatcher@localhost>;tag=3393f0703fb0ccaca74109ff37de39f5-50a8.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">CSeq: 10 OPTIONS.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Call-ID: 6b3a52797fe20b99-14352@127.0.0.1.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Max-Forwards: 70.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Content-Length: 0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">User-Agent: Kamailio.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Contact: foobar.<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">Cheers,<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">Henning<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">-- <o:p>
</o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:EN-US">Henning Westerholt -
</span><span style="mso-fareast-language:EN-US"><a href="https://skalatan.de/blog/"><span lang="EN-GB" style="color:#0563C1">https://skalatan.de/blog/</span></a></span><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">Kamailio services -
</span><span style="mso-fareast-language:EN-US"><a href="https://skalatan.de/services"><span lang="EN-GB" style="color:#0563C1">https://skalatan.de/services</span></a></span><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"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><b>From:</b> sr-users <sr-users-bounces@lists.kamailio.org>
<b>On Behalf Of </b>Karsten Horsmann<br>
<b>Sent:</b> Tuesday, October 22, 2019 6:24 PM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org><br>
<b>Subject:</b> [SR-Users] MS Teams Direct routing with kamailio<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt">Hello List,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt">i search for the right place in kamailio to manipulate the dispatcher OPTIONS packets to add an Contact header.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt">For uac generated traffic i can use the event_route[tm:local-request] from the tm module.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt">But how can i manipulate kamailio *self* generated OPTION pings from the dispatcher?<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt">OPTIONS request for MS Teams must contain the Contact header of such a format:<br>
Contact: <<a href="sip:SBC_FQDN:5061;transport=tls">sip:SBC_FQDN:5061;transport=tls</a>><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt">I follow this guide (for opensips) and try to adapt that step by step to kamailio:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt"><a href="https://blog.opensips.org/2019/09/16/opensips-as-ms-teams-sbc/">https://blog.opensips.org/2019/09/16/opensips-as-ms-teams-sbc/</a> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt">CentOS 7 / kamailio 5.2.x (and maybe soon 5.3.x) / rtpengine<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt">-- <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:35.4pt">Cheers<br>
*Karsten Horsmann*<o:p></o:p></p>
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