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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=RU link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Hi Bogdan,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Thank you indeed for the help!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>After moving the first changing body to branch (and second too), it works perfect.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='color:windowtext;mso-fareast-language:RU'>From:</span></b><span lang=EN-US style='color:windowtext;mso-fareast-language:RU'> Bogdan-Andrei Iancu [mailto:bogdan@opensips.org] <br><b>Sent:</b> Friday, February 2, 2018 5:18 PM<br><b>To:</b> Dmitry <netaskd@gmail.com>; 'OpenSIPS users mailling list' <users@lists.opensips.org><br><b>Subject:</b> Re: [OpenSIPS-Users] Handling 488 on a leg B<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><tt><span style='font-size:10.0pt'>Hi Dmitry,</span></tt><span style='font-size:10.0pt;font-family:"Courier New",serif'><br><br><tt>In order to push per-branch changes (changes which are specific only to a certain branch and not to all of them), you need to use the branch route - see <a href="http://www.opensips.org/Documentation/Script-Routes-2-3#toc2">http://www.opensips.org/Documentation/Script-Routes-2-3#toc2</a></tt><br><br><tt>So, put the code for changing the body via rtpengine into a branch route.</tt><br><br><tt>Regards,</tt><br><br></span><span style='font-size:12.0pt;mso-fareast-language:RU'><o:p></o:p></span></p><pre>Bogdan-Andrei Iancu<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>OpenSIPS Founder and Developer<o:p></o:p></pre><pre> <a href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a><o:p></o:p></pre><pre>OpenSIPS Summit 2018<o:p></o:p></pre><pre> <a href="http://www.opensips.org/events/Summit-2018Amsterdam">http://www.opensips.org/events/Summit-2018Amsterdam</a><o:p></o:p></pre><div><p class=MsoNormal>On 02/02/2018 12:53 PM, Dmitry wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Hi Bogdan,</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I change both of them. The first INVITE and the second (after 488).</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>The first apply successfully, but the second (that in the failure_route) does not.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>My script looks like this:</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>route {</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>…</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> t_on_reply("ONREPLY”);</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> if (isbflagset(NAT_BFLAG) && af!=INET6) {</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> force_rport(); # add rport to first line Via:</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> route(RTPENGINE_OFFER); # make offer</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> }</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>…</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> t_relay();</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>…</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>}</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>route[RTPENGINE_OFFER] {</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> …</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> $avp(rtp_profile) = "trust-address replace-origin replace-session-connection ICE=remove DTLS=off </span><span lang=EN-US style='color:red'>RTP/SAVP</span><span lang=EN-US style='color:#1F497D'>";</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> if (rtpengine_offer("$avp(rtp_profile)","$avp(rtp_socket)","$avp(rtp_body)")) {</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> remove_body_part();</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> add_body_part("$avp(rtp_body)", "application/sdp"); # </span><span lang=EN-US style='color:#0070C0'>first changing leg-B - successfully</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> }</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> …</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>}</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>onreply_route[ONREPLY] {</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>…</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> t_on_reply("RTPENGINE_ANSWER"); # positive</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> t_on_failure("RTPENGINE_488"); # negative</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>…</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>}</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>failure_route[RTPENGINE_488] {</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>…</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> if (t_check_status("488") ) {</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> # </span><span lang=EN-US style='color:#0070C0'>try to change SDP in leg-B after 488 received - unsuccessfully</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> # </span><span lang=EN-US style='color:red'>it returns: ERROR:rtpengine:rtpe_function_call: can't extract body from the message. </span><o:p></o:p></p><p class=MsoNormal><span style='color:windowtext'> </span><span lang=EN-US style='color:#002060'># f</span><span style='color:#002060'>rom which message?</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> if (rtpengine_offer("trust-address replace-origin replace-session-connection ICE=remove DTLS=off </span><span lang=EN-US style='color:red'>RTP/AVP</span><span lang=EN-US style='color:#1F497D'>","$avp(rtp_socket)","$avp(rtp_body)")) {</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> remove_body_part();</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> add_body_part("$avp(rtp_body)", "application/sdp");</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> }</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> # </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> # </span><span lang=EN-US style='color:#002060'>just replace with re.subst</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> $avp(rtp_body) = $(avp(rtp_body){re.subst,/</span><span lang=EN-US style='color:red'>SAVP/AVP</span><span lang=EN-US style='color:#1F497D'>/g});</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> $avp(rtp_body) = $(avp(rtp_body){re.subst,/a=crypto.*//g});</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> # </span><span lang=EN-US style='color:red'>if I use remove_body_part(), then add_body_part() is not adds content. INVITE sends without body</span><span lang=EN-US style='color:#1F497D'>.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> remove_body_part();</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> # </span><span lang=EN-US style='color:red'>if I don’t use remove_body_part(), then INVITE contains TWO sdp body with RTP/SAVP and RTP/AVP</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> add_body_part("$avp(rtp_body)", "application/sdp");</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> #</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> xlog("rtp_body=$avp(rtp_body)\n");</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> # xlog for $avp(rtp_body) shows unchanged content (with RTP/SAVP)</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>…</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> t_relay();</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> }</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>…</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>}</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='color:windowtext;mso-fareast-language:RU'>From:</span></b><span lang=EN-US style='color:windowtext;mso-fareast-language:RU'> Bogdan-Andrei Iancu [<a href="mailto:bogdan@opensips.org">mailto:bogdan@opensips.org</a>] <br><b>Sent:</b> Thursday, February 1, 2018 7:51 PM<br><b>To:</b> Dmitry <a href="mailto:netaskd@gmail.com"><netaskd@gmail.com></a>; 'OpenSIPS users mailling list' <a href="mailto:users@lists.opensips.org"><users@lists.opensips.org></a><br><b>Subject:</b> Re: [OpenSIPS-Users] Handling 488 on a leg B</span><o:p></o:p></p></div></div><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><tt><span style='font-size:10.0pt'>Hi Dmitry,</span></tt><span style='font-size:10.0pt;font-family:"Courier New",serif'><br><br><tt>In failure route you re-process the original request (INVITE) and not the 488 reply - the reply is just the trigger.</tt><br><tt>Do you change the INVITE SDP before the first attempt (which ends with 488) ? Or you change it for the first time in the failure route ?</tt><br><br><tt>Regards,</tt><br><br><br></span><o:p></o:p></p><pre>Bogdan-Andrei Iancu<o:p></o:p></pre><pre> <o:p></o:p></pre><pre>OpenSIPS Founder and Developer<o:p></o:p></pre><pre> <a href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a><o:p></o:p></pre><pre>OpenSIPS Summit 2018<o:p></o:p></pre><pre> <a href="http://www.opensips.org/events/Summit-2018Amsterdam">http://www.opensips.org/events/Summit-2018Amsterdam</a><o:p></o:p></pre><div><p class=MsoNormal>On 02/01/2018 05:34 PM, Dmitry wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Hello Bogdan,</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Thank you for advice.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I catched 488 and can send INVITE from failure_route, but I can’t modify body inside it.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>The main goal is change SAVP profile to AVP when 488 received.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I tried to do it via rtpengine_offer function. It doesn’t work. I guess, it try to read the body from response (488 in my case) but not from request.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I tried to rewrite body via remove_body_part and add_body_part functions, it also doesn’t work.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>So, I don’t understand how exactly rewrite body in failure_route before do t_relay().</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>In addition, I tried making a new branch (via append_branch function and via branch_route). It just duplicate my re-INVITE without changing the body.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Could you please drop a hint (example on few lines of code) how to do it?</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Thanks.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='color:windowtext;mso-fareast-language:RU'>From:</span></b><span lang=EN-US style='color:windowtext;mso-fareast-language:RU'> Bogdan-Andrei Iancu [<a href="mailto:bogdan@opensips.org">mailto:bogdan@opensips.org</a>] <br><b>Sent:</b> Wednesday, January 31, 2018 6:55 PM<br><b>To:</b> OpenSIPS users mailling list <a href="mailto:users@lists.opensips.org"><users@lists.opensips.org></a>; Dmitry <a href="mailto:netaskd@gmail.com"><netaskd@gmail.com></a><br><b>Subject:</b> Re: [OpenSIPS-Users] Handling 488 on a leg B</span><o:p></o:p></p></div></div><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><tt><span style='font-size:10.0pt'>Hello Dmitry,</span></tt><span style='font-size:10.0pt;font-family:"Courier New",serif'><br><br><tt>What you want to do is called (in SIP) serial forking. Use failure_route{} to catch the 488 and to add a create a new branch (with modified body) .</tt><br><br><tt>See: <a href="http://www.opensips.org/Documentation/Script-Routes-2-3#toc3">http://www.opensips.org/Documentation/Script-Routes-2-3#toc3</a></tt><br><br><tt>Regards,</tt><br><br><br><br></span><o:p></o:p></p><pre>Bogdan-Andrei Iancu<o:p></o:p></pre><pre> <o:p></o:p></pre><pre>OpenSIPS Founder and Developer<o:p></o:p></pre><pre> <a href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a><o:p></o:p></pre><pre>OpenSIPS Summit 2018<o:p></o:p></pre><pre> <a href="http://www.opensips.org/events/Summit-2018Amsterdam">http://www.opensips.org/events/Summit-2018Amsterdam</a><o:p></o:p></pre><div><p class=MsoNormal>On 01/30/2018 02:56 PM, Dmitry wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span lang=EN-US>Hello all,</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Could you say how can I re-send INVITE with changed SDP to B-leg after receive 488 from it?</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Call flow:</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>-> A-leg INVITE</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US><- A-leg 100</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>-> B-leg INVITE</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US><- B-leg 100</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US><- B-leg 488 – I catch it, and want to send INVITE again with properly SDP</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>-> B-leg ACK</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US><-A-leg 488</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>-> B-leg ACK</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Thanks for any advice.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Cheers!</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt'><br><br><br><br><br></span><o:p></o:p></p><pre>_______________________________________________<o:p></o:p></pre><pre>Users mailing list<o:p></o:p></pre><pre><a href="mailto:Users@lists.opensips.org">Users@lists.opensips.org</a><o:p></o:p></pre><pre><a href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><o:p></o:p></pre></blockquote><p class=MsoNormal><span style='font-size:12.0pt'> </span><o:p></o:p></p></blockquote><p class=MsoNormal><span style='font-size:12.0pt'> </span><o:p></o:p></p></blockquote><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:RU'><o:p> </o:p></span></p></div></body></html>