<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">CANCELs are hop-by-hop, so the SBC calor do that.<br><br><div dir="ltr">—<div>Sent from mobile, with due apologies for brevity and errors.</div></div><div dir="ltr"><br><blockquote type="cite">On Jan 28, 2020, at 9:06 AM, Yuriy Gorlichenko <ovoshlook@gmail.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="auto">300 Redirect ends transaction<div dir="auto">When SBC creates invite based on Redirect message it becomes new transaction, which is not for kamailio for now but for point you getting from the Redirect response. </div><div dir="auto"><br></div><div dir="auto">In this case SBC must send CANCEL not to kamailio but to point you got from the Redirect response.</div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 28 Jan 2020, 14:46 Ali Taher, <<a href="mailto:ataher@vanrise.com">ataher@vanrise.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">Hello Alex,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Kamailio sent 300 multiple choice back to SBC even after the SBC sent the CANCEL request , knowing that SBC sent the CANCEL 4 times as Kamailio didn’t respond to it , which is normal as in the routing logic I’m only handling INVITE packets
(if (is_method("INVITE"))).<u></u><u></u></p>
<p class="MsoNormal">So I’m confused whether I have to handle it or not. <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Regards,
<u></u><u></u></p>
<p class="MsoNormal">Ali Taher<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><b>From:</b> sr-users <<a href="mailto:sr-users-bounces@lists.kamailio.org" target="_blank" rel="noreferrer">sr-users-bounces@lists.kamailio.org</a>> <b>
On Behalf Of </b>Alex Balashov<br>
<b>Sent:</b> Tuesday, January 28, 2020 3:37 PM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List <<a href="mailto:sr-users@lists.kamailio.org" target="_blank" rel="noreferrer">sr-users@lists.kamailio.org</a>><br>
<b>Subject:</b> Re: [SR-Users] SIP Redirect CANCEL handling<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Unless you have created a transaction in the course of processing the redirect, there is no transaction to terminate, and accordingly no 487 to generate. However, these decisions are made by the default CANCEL handling (with hooks into
TM) from the stock Kamailio config. You should not need any special logic of your own here.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">—<u></u><u></u></p>
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<p class="MsoNormal">Sent from my iPad<u></u><u></u></p>
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<p class="MsoNormal"><br>
<br>
<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">On Jan 28, 2020, at 8:29 AM, Ali Taher <<a href="mailto:ataher@vanrise.com" target="_blank" rel="noreferrer">ataher@vanrise.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Hello,<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">I’m using Kamailio as sip redirect server where SBC forwards the calls to Kamailio which sends the routing back to SBC in 3xx response.<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Now, I need to handle CANCEL requests sent from SBC to Kamailio. Here is the scenario:<u></u><u></u></p>
<p class="MsoNormal">the client sends CANCEL request to SBC which responds with 200 OK and 487 Request Terminated and then sends CANCEL request to Kamailio.<u></u><u></u></p>
<p class="MsoNormal">I’m not sure how Kamailio should handle the CANCEL request here, should it send only 200 OK back to SBC or also should send 487 request terminated?<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Regards,<u></u><u></u></p>
<p class="MsoNormal">Ali Taher<u></u><u></u></p>
<p class="MsoNormal">_______________________________________________<br>
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