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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">With the local changes (see mail below) in function t_continue() (adding the handling of REQUEST route), I introduced some side effects.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The handling of distinct PSIs does not work correctly with examples/scscf/kamailio.cfg, because the function t_continue() deletes the transaction,
although the route in the config file added a UAC towards the AS.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Now, when the transaction is deleted erroneously, the S-CSCF does not any more answer with ACK to the 503 from the AS. Also retransmissions of
the INVITE to AS are NOT performed.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I did another correction and added a branch in the if() clause at the end of t_continue() (see attached file t_suspend.c).<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:70.8pt"><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:70.8pt"><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:#1F497D">done:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:70.8pt"><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:#1F497D"> UNLOCK_ASYNC_CONTINUE(t);<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:70.8pt"><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:70.8pt"><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:#1F497D">
</span><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:red">if (t->async_backup.backup_route == REQUEST_ROUTE){<o:p></o:p></span></b></p>
<p class="MsoNormal" style="margin-left:70.8pt"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:red"> if (t->nr_of_outgoings < (uac ? 2 : 1)){<o:p></o:p></span></b></p>
<p class="MsoNormal" style="margin-left:70.8pt"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:red">
</span></b><b><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";color:red">/* unref the transaction */<o:p></o:p></span></b></p>
<p class="MsoNormal" style="margin-left:70.8pt"><b><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";color:red"> t_unref(t->uas.request);<o:p></o:p></span></b></p>
<p class="MsoNormal" style="margin-left:70.8pt"><b><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";color:red">
</span></b><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:red">}<o:p></o:p></span></b></p>
<p class="MsoNormal" style="margin-left:70.8pt"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:red"> } else</span></b><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:red">
</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Courier New";color:#1F497D">if (t->async_backup.backup_route != TM_ONREPLY_ROUTE){<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Here the transaction is only deleted, if the REQUEST route in the config file did NOT add an UAC.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I would be glad, if someone could confirm or reject, whether those changes would be in line with kamailio’s architecture.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Should those changes be brought to github?<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Please find as additional information some tshark traces and log file before (count 62) the recent correction and after (count 63) the recent correction.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">All the best<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Christoph<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> sr-users [mailto:sr-users-bounces@lists.sip-router.org]
<b>On Behalf Of </b>Valentin Christoph<br>
<b>Sent:</b> Thursday, September 22, 2016 3:33 PM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List<br>
<b>Cc:</b> Onic Roman<br>
<b>Subject:</b> Re: [SR-Users] Addressing a distinct PSI result is: 555 AS Contacting Failed - iFC terminated dialog<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Carsten,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I had to update the file modules/tm/t_suspend.c (see attachment).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I did following change and hope I did not cause any side effects:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> /* which route block type were we in when we were suspended */<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> cb_type = FAILURE_CB_TYPE;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> switch (t->async_backup.backup_route) {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case REQUEST_ROUTE:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> cb_type =
<b>REQUEST_CB_TYPE</b>;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> break;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case FAILURE_ROUTE:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> cb_type = FAILURE_CB_TYPE;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> break;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case TM_ONREPLY_ROUTE:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> cb_type = ONREPLY_CB_TYPE;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> break;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case BRANCH_ROUTE:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> cb_type =
<b>BRANCH_CB_TYPE</b>;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> break;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Currently I have a local copy of latest 4.4 branch. I’m far away from bringing changes back to github (need to learn a lot more, before actively
cooperating).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Christoph<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> sr-users [</span><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><a href="mailto:sr-users-bounces@lists.sip-router.org"><span lang="EN-US">mailto:sr-users-bounces@lists.sip-router.org</span></a></span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">]
<b>On Behalf Of </b>Carsten Bock<br>
<b>Sent:</b> Thursday, September 22, 2016 3:22 PM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List<br>
<b>Cc:</b> Onic Roman<br>
<b>Subject:</b> Re: [SR-Users] Addressing a distinct PSI result is: 555 AS Contacting Failed - iFC terminated dialog<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal">Hi Valentin,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">where was it?<o:p></o:p></p>
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<p class="MsoNormal"><br>
Greeting from Hamburg,<o:p></o:p></p>
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<p class="MsoNormal">Carsten<o:p></o:p></p>
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<p class="MsoNormal"><span style="border:solid windowtext 1.0pt;padding:0cm"><img border="0" width="1" height="1" id="_x0000_i1025" src="cid:image001.jpg@01D21EFD.4469A8A0" alt="Das Bild wurde vom Absender entfernt."></span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">2016-09-22 14:58 GMT+02:00 Valentin Christoph <<a href="mailto:Christoph.Valentin@kapsch.net" target="_blank">Christoph.Valentin@kapsch.net</a>>:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Hi all,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#1F497D">No further need to investigate.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#1F497D">I found the bug.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#1F497D">Thanks,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#1F497D">Christoph</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> sr-users
[mailto:<a href="mailto:sr-users-bounces@lists.sip-router.org" target="_blank">sr-users-bounces@lists.sip-router.org</a>]
<b>On Behalf Of </b>Valentin Christoph<br>
<b>Sent:</b> Tuesday, September 20, 2016 12:13 PM<br>
<b>To:</b> <a href="mailto:sr-users@lists.sip-router.org" target="_blank">sr-users@lists.sip-router.org</a><br>
<b>Cc:</b> Onic Roman<br>
<b>Subject:</b> [SR-Users] Addressing a distinct PSI result is: 555 AS Contacting Failed - iFC terminated dialog</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi all,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I’m trying to send a call to an AS via a kamailio S-CSCF (release 4.4.3). I’m addressing the AS by a distinct PSI:
<a href="sip:04325432101@domain.net;user=gsmr">sip:04325432101@domain.net;user=gsmr</a>.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">At the first try the S-CSCF sends a SAR to HSS and receives a successful SAA (tshark traces attached), but the S-CSCF rejects the call with 555 AS Contacting
Failed - iFC terminated dialog.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">At the second try (a few seconds later), the S-CSCF doesn’t exchange SAR/SAA with the HSS, and now the call is successfully forwarded to the AS.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">This problem is permanent, it is not the result of a temporary loss of connectivity between S-CSCF and AS.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I checked the iFCs that I had configured at the HSS and I think, they are OK.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I attached
</span><o:p></o:p></p>
<p><span lang="EN-US">-</span><span lang="EN-US" style="font-size:7.0pt"> </span>
<span lang="EN-US">tshark traces from the node, where the S-CSCF resides: 2016_09_19_error_555_17_scscf_filtered.pcap</span><o:p></o:p></p>
<p><span lang="EN-US">-</span><span lang="EN-US" style="font-size:7.0pt"> </span>
<span lang="EN-US">WITH_DEBUG logs from kamailio: 2016_09_19_error_555_17_kamailio_1st_try.log</span><o:p></o:p></p>
<p><span lang="EN-US">-</span><span lang="EN-US" style="font-size:7.0pt"> </span>
<span lang="EN-US">A tarball of /usr/local/etc/kamailio: 2016_09_19_error_555_17_kamailio.tar.gz</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Can anybody help? Is it a bug in kamailio or is the problem on my side?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Thanks,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Christoph</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span style="font-size:7.0pt"><br>
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