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<p>Hi Liviu.</p>
<p><br>
</p>
<p>Thank you for your reply!</p>
<p><br>
</p>
<p>I guess the second INVITE is a Re-INVITE, as you commented.</p>
<p>In this case, is it possible to keep stored the value of <tt>$avp(attr)</tt> and use it when necessary even after receiving the Re-INVITE?</p>
<p><br>
</p>
<p>----------<br>
</p>
<p><br>
</p>
<p>Yes we have a retry, not a parallel forked call, but just when the Re-INVITE is received by OpenSIPS. By other side, the first INVITE is for a parallel forked call, if I'm well understanding the SIP here.</p>
<p>The first INVITE is:</p>
<p><br>
</p>
<p></p>
<div> SIP Message: INVITE sip:g1r2u3p4o5@127.0.0.1 SIP/2.0<br>
<span> </span>Via: SIP/2.0/TLS 127.0.0.1:42194;rport;branch=z9hG4bKPjd3128578-0158-4c58-8c1c-676aa864d8ca;alias<br>
<span> </span>Max-Forwards: 70<br>
<span> </span>From: "ext1" <sip:intercomB_RYg7tf4xx6JV@127.0.0.1>;tag=469b3a48-1548-4af6-8e03-a5c855ce85f4<br>
<span> </span>To: <sip:g1r2u3p4o5@127.0.0.1><br>
<span> </span>Contact: "ext1" <sip:intercomB_RYg7tf4xx6JV@127.0.0.1:42194;transport=TLS;ob>;+sip.ice<br>
<span> </span>Call-ID: 22cb74fc-3d3b-4a37-9572-32f48c9943ff<br>
<span> </span>CSeq: 21431 INVITE<br>
<span> </span>Route: <sip:intercomB_RYg7tf4xx6JV@127.0.0.1;transport=tls;lr><br>
<span> </span>Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS<br>
<span> </span>Supported: replaces, 100rel, timer, norefersub<br>
<span> </span>Session-Expires: 1800<br>
<span> </span>Min-SE: 90<br>
<span> </span>Content-Type: application/sdp<br>
<span> </span>Content-Length: 1267<br>
<br>
There is more than one registered (on-line) subscriber <span>g1r2u3p4o5. So, <span>
g1r2u3p4o5</span> has more than one AOR. I have 3 devices online for the subscriber
<span><span>g1r2u3p4o5</span></span>.<br>
The reply SIP OK comes from another network (not the local one), from IP <span>10.0.60.246</span>. After such reply, the Re-INVITE is:<br>
</span><span><br>
</span></div>
<br>
<p></p>
<p></p>
<div><span> </span>SIP Message: INVITE sip:g1r2u3p4o5@10.0.60.246:59673;transport=TLS SIP/2.0<br>
<span> </span>Via: SIP/2.0/TLS 192.168.0.81:54188;rport;branch=z9hG4bKPjdde63995-7ed0-436a-983f-61d0e5df9498;alias<br>
<span> </span>Max-Forwards: 70<br>
<span> </span>From: "ext1" <sip:intercomB_RYg7tf4xx6JV@127.0.0.1>;tag=469b3a48-1548-4af6-8e03-a5c855ce85f4<br>
<span> </span>To: <sip:g1r2u3p4o5@127.0.0.1>;tag=393a402c<br>
<span> </span>Contact: "ext1" <sip:intercomB_RYg7tf4xx6JV@127.0.0.1:42194;transport=TLS;ob>;+sip.ice<br>
<span> </span>Call-ID: 22cb74fc-3d3b-4a37-9572-32f48c9943ff<br>
<span> </span>CSeq: 21433 INVITE<br>
<span> </span>Route: <sip:icchw.jflddns.com.br:5061;transport=tls;lr;did=d53.353e0122><br>
<span> </span>Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS<br>
<span> </span>Supported: replaces, 100rel, timer, norefersub<br>
<span> </span>Session-Expires: 1800;refresher=uac<br>
<span> </span>Min-SE: 90<br>
<span> </span>Content-Type: application/sdp<br>
<span> </span>Content-Length: 332<br>
<br>
In this moment I need to know if the device (callee) is in another network, in fact, to take some fixes in SDP of INVITEs and SIP OKs.<br>
The <span><span>$(avp(attr)[$T_branch_idx])</span></span> should have the information that I need.<br>
<br>
If it is not possible to keep the <span><span>$(avp(attr)[$T_branch_idx])</span></span> stored, is it possible to know if a device is in another network when it is a callee?<br>
<br>
Any hint will be very helpful !!<br>
<br>
Best regards.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>De:</b> Users <users-bounces@lists.opensips.org> em nome de Liviu Chircu <liviu@opensips.org><br>
<b>Enviado:</b> terça-feira, 29 de agosto de 2017 12:34<br>
<b>Para:</b> users@lists.opensips.org<br>
<b>Assunto:</b> Re: [OpenSIPS-Users] $(avp(attr)[$T_branch_idx]) is NULL for second INVITE. How to solve it ?</font>
<div> </div>
</div>
<div>
<p><tt>Hi Rodrigo,</tt></p>
<p><br>
</p>
<p><tt>Just trying to understand the flow here - could it be actually a Re-INVITE that goes through your sequential routing block, thus lookup() is not called, leaving $avp(attr) NULL throughout that transaction?<br>
</tt></p>
<p><tt><br>
</tt></p>
<p><tt>Regardless of the above, in OpenSIPS terms, each "branch" points to a different destination. In our case, we're talking about a retry, not a serial/parallel forked call. Which means that you should only bother with $T_branch_idx if a lookup() could yield
more than one device to be contacted for the same AoR.</tt></p>
<p><tt><br>
</tt></p>
<p><tt>Best regards,<br>
</tt></p>
<pre class="moz-signature" cols="72">Liviu Chircu
OpenSIPS Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com" id="LPlnk492951" previewremoved="true">http://www.opensips-solutions.com</a></pre>
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<div class="moz-cite-prefix">On 29.08.2017 18:05, Rodrigo Pimenta Carvalho wrote:<br>
</div>
<blockquote type="cite">
<div id="divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:#000000; font-family:Calibri,Helvetica,sans-serif">
<p><br>
</p>
<p>Dear SIPusers,</p>
<p><br>
</p>
<p>In my project I use to keep a valuable information in table location. This is about the state of a subscriber's localization.</p>
<p>I have to read such information for the callees, every time a new branch is created and every time a INVITE is answered with SIP OK.</p>
<p>So, my OpenSIPS configuration has something similar to the following code:</p>
<p><br>
</p>
<p><span>1 route{</span></p>
<p>2 ... // hidden code for simplification.<br>
</p>
<p>3 <span>lookup("location","m")</span></p>
<p>4 ...<br>
</p>
<p>5 <span> route(relay);</span><br>
</p>
<p>6 }</p>
<p><br>
</p>
<p><span>7 route[relay]</span>{</p>
<div>8 if (is_method("INVITE")) { <br>
9 ...<br>
10 t_on_branch("per_branch_ops"); <br>
11 t_on_reply("handle_nat"); <br>
12 t_on_failure("missed_call"); <br>
13 } </div>
14 ...
<p>15 }</p>
<p><br>
</p>
<p><span>16 branch_route[per_branch_ops] { <br>
17 ....</span></p>
<p><span><span>18 $(avp(attr)[$T_branch_idx])</span><br>
</span></p>
<p><span>19 ...<br>
</span></p>
<p><span>20 }</span></p>
<p><span><br>
</span></p>
<p><span><span>21 onreply_route[handle_nat] {</span><br>
</span></p>
<p><span>22 ...</span></p>
<p><span>23 <span>$(avp(attr)[$T_branch_idx])</span><br>
</span></p>
<p><span>24 ...<br>
</span></p>
<p><span>25 }</span></p>
<p>26 ...<br>
</p>
<p><br>
</p>
<p>In a determined call, when the OpenSIPS receives the INVITE and then a SIP OK (200), the code gets right value in lines 18 and 23.</p>
<p>In such call, the SIP OK (from callee) offers a kind of video that the caller can't support. In this case the caller sends another SIP INVITE with inactive video (SDP).</p>
<p>In this moment, OpenSIPS gets this second INVITE and create a new branch.</p>
<p>However, for this new branch, lines 18 and 23 give me NULL for <span><span>$(avp(attr)[$T_branch_idx])</span></span>.</p>
<p><br>
</p>
<p>How to solve this issue?</p>
<p><br>
</p>
<p>Any hint will be very helpful!!</p>
<p><br>
</p>
<p>Best regards!</p>
<p><br>
</p>
<p>P.S.: I'm not expert in SIP.<br>
</p>
<p><br>
</p>
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