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Hello,<br>
<br>
iirc, the to-tag is set in the dialog structure when the 200ok is
processed. During the call setup, there can be many outgoing
branches, therefore many 'early' to-tags, but only one will be
final, once the call is answered.<br>
<br>
On the other hand, there is a C function that returns the local
generated To-tag. It is in sl module, named get_reply_totag(...). It
is not available in the config file, not being needed so far.<br>
<br>
Anyhow, in your case, might be better to add a function
dlg_get_early(callid, ftag), because to-tag of the dialog is not
really known at that moment.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="moz-cite-prefix">On 14/07/15 17:14, Joao Alves wrote:<br>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m trying to restore a SIP session
dialogue context and found dlg_get(callid, ftag, ttag)
function for that.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, I cannot access the To tag. I
noticed on the 180 RINGING there was already an self-generated
included on this response, but I also could not access its
value.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When receiving the SIP INVITE request I
used the dlg_manage() and the context was initially stored.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">if(is_known_dlg()) {</span><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif"> xlog("Request $rm from
$ci is in-dialog\n");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif"> xlog(">>From tag is
$ft and To tag is $tt\n");<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif"> # Needed to later restore
the dialog
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif"> $shv(ftag)=$ft;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif"> $shv(ttag)=$tt;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) ERROR: <script>: Request
INVITE from 76589ZWQ5NzIyYjMzNDI1YjVjM2E5ZWU5NjhkYzEyNjE3MzQ
is in-dialog</span><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) exec: ***
cfgtrace:request_route=[MATRIX]
c=[/etc/kamailio/kamailio.cfg] l=1021 a=25 n=xlog<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: pv [pv_core.c:376]:
pv_get_xto_attr(): no Tag parameter<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) ERROR: <script>:
>>From tag is 8fd06474 and To tag is <null><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Since there was a self-generated one (after
the 180 RINGING being sent), I rechecked the $tt and
$dlg(to_tag) values and both still returned null values.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: tm [t_lookup.c:1083]:
t_check_msg(): DEBUG: t_check_msg: T already found!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: <core>
[tcp_main.c:2196]: tcpconn_send_put(): send from reader
(49100 (15)), reusing fd<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: <core>
[tcp_main.c:2430]: tcpconn_do_send(): sending...<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: <core>
[tcp_main.c:2464]: tcpconn_do_send(): after real write: c=
0x7effdf7da860 n=396 fd=5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: <core>
[tcp_main.c:2465]: tcpconn_do_send(): buf=<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">SIP/2.0 180 ringing<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">Via: SIP/2.0/TCP
192.168.1.5:58751;branch=z9hG4bK-524287-1---a64e0a42199ee419;rport=61134;received=85.138.200.8<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">To:
<a class="moz-txt-link-rfc2396E" href="sip:1001@decasa.website"><sip:1001@decasa.website></a>;tag=a6a1c5f60faecf035a1ae5b6e96e979a-f6a3<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">From:
"1000"<a class="moz-txt-link-rfc2396E" href="sip:1000@decasa.website"><sip:1000@decasa.website></a>;tag=8fd06474<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">Call-ID:
76589ZWQ5NzIyYjMzNDI1YjVjM2E5ZWU5NjhkYzEyNjE3MzQ<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">CSeq: 1 INVITE<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">Server: kamailio (4.3.0 (x86_64/linux))<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">Content-Length: 0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">..., shmem=0x7effdf7e1e00: SIP/2.0 180
ringingght(): DEBUG: reply sent out. buf=0x7effec023bf8:
SIP/2.0 180 ringing<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: tm [t_reply.c:657]:
_reply_light(): DEBUG: _reply_light: finished<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: sl [sl.c:272]:
send_reply(): reply in stateful mode (tm)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) exec: ***
cfgtrace:request_route=[MATRIX]
c=[/etc/kamailio/kamailio.cfg] l=1031 a=25 n=xlog<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: dialog [dlg_hash.c:640]:
dlg_lookup(): ref dlg 0x7effdf7e1bf0 with 1 -> 2<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: dialog [dlg_hash.c:642]:
dlg_lookup(): dialog id=5769 found on entry 128<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: dialog [dlg_hash.c:858]:
dlg_unref(): unref dlg 0x7effdf7e1bf0 with 1 -> 1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) ERROR: <script>: Dialog
To Tag: <null>
<==
</span><span style="font-family:"Times New
Roman",serif">xlog("</span><span
style="font-family:"Times New Roman",serif">Dialog
To Tag:</span><span style="font-family:"Times New
Roman",serif"> $dlg(to_tag)\n");</span><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) exec: ***
cfgtrace:request_route=[MATRIX]
c=[/etc/kamailio/kamailio.cfg] l=1033 a=25 n=xlog<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) DEBUG: pv [pv_core.c:376]:
pv_get_xto_attr(): no Tag parameter<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman",serif">15(49100) ERROR: <script>:
>>From2 tag is 8fd06474 and To tag is <null><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span
style="font-size:9.0pt;font-family:"Verdana",sans-serif">Joao
Alves</span></b><b><span
style="font-size:9.0pt;font-family:"Verdana",sans-serif"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:black">Solution
Architect, Unified Communications</span><span
style="font-size:7.5pt;font-family:"Verdana",sans-serif"
lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Verdana",sans-serif"
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
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Book: SIP Routing With Kamailio - <a class="moz-txt-link-freetext" href="http://www.asipto.com">http://www.asipto.com</a></pre>
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