<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>Hello,</p>
<p>a while ago I did some work to make possible to specify the
outgoing tcp connection id, see:</p>
<p> *
<a class="moz-txt-link-freetext" href="https://www.kamailio.org/docs/modules/stable/modules/tcpops.html#tcpops.f.tcp_set_otcpid">https://www.kamailio.org/docs/modules/stable/modules/tcpops.html#tcpops.f.tcp_set_otcpid</a></p>
<p>And the next function after it.</p>
<p>However, the testing was minimal, maybe not verifying the entire
chain with t_relay()/forward(). Even more, the specifying of the
outbound tcp connection was supposed to be done internally by the
lookup("location"), the functions from tcpops being added for more
config flexibility, suitable for single branch forwarding or
branch_route blocks.</p>
<p>However, in your seem to do manual processing with
reg_fetch_contacts(), not rely on lookup location. You can test
with master and use $sbranch(...) and corresponding functions from
pv module, instead of setting the r-uri and append_branch().</p>
<p>Cheers,<br>
Daniel<br>
</p>
<div class="moz-cite-prefix">On 10.03.21 06:00, Marrold wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAC-Lcd9ETUU_LSLDxbEvOz+xTdY55g28MhrMx8=EenLYdXVwEQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Hi,<br>
<br>
I've done a bit more digging and realised that $conid is
read-only, and only available for an inbound connection - so I
dont think it will achieve what I need.
<div><br>
</div>
<div>I did a bit more troubleshooting and observed the
differences in the debug log between two identical calls:
<div><br>
This example failed - the INVITEs went out to the incorrect
endpoint / TCP connection. The "ulc_conid" from the location
table for the TCP endpoint is 13:<br>
<br>
</div>
<div><font face="monospace">Mar 9 10:30:20 proxy-01
/sbin/kamailio[27014]: ERROR: <script>: Adding to
main branch. ua: Yealink SIP-T42G 29.83.0.120 ru: <a
href="http://sip:442079460000@10.0.130.218:5060"
target="_blank" moz-do-not-send="true">sip:442079460000@10.0.130.218:5060</a>
du: sip:<a href="http://203.0.113.1:1046" target="_blank"
moz-do-not-send="true">203.0.113.1:1046</a> ulc_conid: 0
flags: 192 ci:
162e3e84-4036-48d7-a1d1-79cc92b7cea4-2-1@sip-server-01<br>
Mar 9 10:30:20 proxy-01 /sbin/kamailio[27014]: ERROR:
<script>: Adding to child branch. ua: Yealink
SIP-T58 58.85.0.5 ru:
<a class="moz-txt-link-freetext" href="sip:442079460000@10.0.130.241:50130;transport=TCP">sip:442079460000@10.0.130.241:50130;transport=TCP</a> du:
<a class="moz-txt-link-freetext" href="sip:203.0.113.1:50130;transport=tcp">sip:203.0.113.1:50130;transport=tcp</a> ulc_conid: 13 flags:
192 ci:
162e3e84-4036-48d7-a1d1-79cc92b7cea4-2-1@sip-server-01<br>
<br>
</font>The debug log shows the wrong connection was found <i>by
id, </i>which in this case was 2, but should have been
13:</div>
<div><br>
<font face="monospace">Mar 9 10:30:21 proxy-01
/sbin/kamailio[27014]: INFO: <script>: ONSEND: rm:
INVITE ru: <a
href="http://sip:442079460000@10.0.130.218:5060"
target="_blank" moz-do-not-send="true">sip:442079460000@10.0.130.218:5060</a>
du: sip:<a href="http://203.0.113.1:1046" target="_blank"
moz-do-not-send="true">203.0.113.1:1046</a> proto: udp
src: <a href="http://185.28.212.61:5060" target="_blank"
moz-do-not-send="true">185.28.212.61:5060</a> dest: <a
href="http://203.0.113.1:1046" target="_blank"
moz-do-not-send="true">203.0.113.1:1046</a> ci:
162e3e84-4036-48d7-a1d1-79cc92b7cea4-2-1@sip-server-01</font><br>
<font face="monospace">Mar 9 10:30:21 proxy-01
/sbin/kamailio[27014]: INFO: <script>: ONSEND: rm:
INVITE ru: <a
href="http://sip:442079460000@10.0.130.218:5060"
target="_blank" moz-do-not-send="true">sip:442079460000@10.0.130.218:5060</a>
du: sip:<a href="http://203.0.113.1:1046" target="_blank"
moz-do-not-send="true">203.0.113.1:1046</a> proto: tcp
src: <a href="http://185.28.212.61:5062" target="_blank"
moz-do-not-send="true">185.28.212.61:5062</a> dest: <a
href="http://203.0.113.1:50130" target="_blank"
moz-do-not-send="true">203.0.113.1:50130</a> ci:
162e3e84-4036-48d7-a1d1-79cc92b7cea4-2-1@sip-server-01</font><br>
<font face="monospace">Mar 9 10:30:21 proxy-01
/sbin/kamailio[27014]: DEBUG: <core>
[core/tcp_main.c:1651]: _tcpconn_find(): found connection
by id: 2</font><br>
<font face="monospace">Mar 9 10:30:21 proxy-01
/sbin/kamailio[27014]: DEBUG: <core>
[core/tcp_main.c:2545]: tcpconn_send_put(): found fd in
cache (5, 0x7fedc49d2448, 2)</font><br>
<br>
This example worked - the INVITEs went out to the correct
endpoints / TCP connections. The "ulc_conid" from the
location table for the TCP endpoint is still 13:</div>
<div><br>
<font face="monospace">Mar 9 10:42:30 proxy-01
/sbin/kamailio[27016]: ERROR: <script>: Adding to
main branch. ua: Yealink SIP-T42G 29.83.0.120 ru: <a
href="http://sip:442079460000@10.0.130.218:5060"
target="_blank" moz-do-not-send="true">sip:442079460000@10.0.130.218:5060</a>
du: sip:<a href="http://203.0.113.1:1046" target="_blank"
moz-do-not-send="true">203.0.113.1:1046</a> ulc_conid: 0
flags: 192 ci:
95ba0691-bdfc-4293-b99d-d46946cb5180-2-1@sip-server-01<br>
Mar 9 10:42:30 proxy-01 /sbin/kamailio[27016]: ERROR:
<script>: Adding to child branch. ua: Yealink
SIP-T58 58.85.0.5 ru:
<a class="moz-txt-link-freetext" href="sip:442079460000@10.0.130.241:50130;transport=TCP">sip:442079460000@10.0.130.241:50130;transport=TCP</a> du:
<a class="moz-txt-link-freetext" href="sip:203.0.113.1:50130;transport=tcp">sip:203.0.113.1:50130;transport=tcp</a> ulc_conid: 13 flags:
192 ci:
95ba0691-bdfc-4293-b99d-d46946cb5180-2-1@sip-server-01</font><br>
<br>
The debug log shows the correct connection was found <i>by
peer address </i>and determined the correct connection
13:</div>
<div><br>
<font face="monospace">Mar 9 10:42:31 proxy-01
/sbin/kamailio[27016]: INFO: <script>: ONSEND: rm:
INVITE ru: <a
href="http://sip:442079460000@10.0.130.218:5060"
target="_blank" moz-do-not-send="true">sip:442079460000@10.0.130.218:5060</a>
du: sip:<a href="http://203.0.113.1:1046" target="_blank"
moz-do-not-send="true">203.0.113.1:1046</a> proto: udp
src: <a href="http://185.28.212.61:5060" target="_blank"
moz-do-not-send="true">185.28.212.61:5060</a> dest: <a
href="http://203.0.113.1:1046" target="_blank"
moz-do-not-send="true">203.0.113.1:1046</a> conid:
<null> ci:
95ba0691-bdfc-4293-b99d-d46946cb5180-2-1@sip-server-01<br>
Mar 9 10:42:31 proxy-01 /sbin/kamailio[27016]: INFO:
<script>: ONSEND: rm: INVITE ru: <a
href="http://sip:442079460000@10.0.130.218:5060"
target="_blank" moz-do-not-send="true">sip:442079460000@10.0.130.218:5060</a>
du: sip:<a href="http://203.0.113.1:1046" target="_blank"
moz-do-not-send="true">203.0.113.1:1046</a> proto: tcp
src: <a href="http://185.28.212.61:5062" target="_blank"
moz-do-not-send="true">185.28.212.61:5062</a> dest: <a
href="http://203.0.113.1:50130" target="_blank"
moz-do-not-send="true">203.0.113.1:50130</a> conid:
<null> ci:
95ba0691-bdfc-4293-b99d-d46946cb5180-2-1@sip-server-01<br>
Mar 9 10:42:31 proxy-01 /sbin/kamailio[27016]: DEBUG:
<core> [core/tcp_main.c:1670]: _tcpconn_find():
found connection by peer address (id: 13)<br>
Mar 9 10:42:31 proxy-01 /sbin/kamailio[27016]: DEBUG:
<core> [core/tcp_main.c:2548]: tcpconn_send_put():
tcp connection found (0x7fedc49ce0e8), acquiring fd<br>
</font><br>
Additionally I checked the connection IDs and IPs / Ports
before a failed and working call and they had not changed,
it was the same TCP connection - so it doesn't appear to be
some interaction with a connection closing or changing. We
also don't see this issue using <font face="arial,
sans-serif">the standard <span
style="background-color:rgb(252,255,252);color:rgb(0,0,0)">lookup</span>()
function.</font><br>
<br>
Does anyone know why Kamailio is intermittently switching
between finding by peer address and id, and why it's using
the wrong ID? <br>
<br>
Thanks again<br>
Matthew<br>
<br>
</div>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Mar 9, 2021 at 8:56 AM
Marrold <<a href="mailto:kamailio@marrold.co.uk"
target="_blank" moz-do-not-send="true">kamailio@marrold.co.uk</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Hi all,
<div><br>
</div>
<div>I'm currently adding a feature to our Kamailio
configuration to fork calls based on user agent.</div>
<div><br>
</div>
<div>To do so I'm getting the registered endpoints
with reg_fetch_contacts() iterating through and matching
on them, then using seturi() / append_branch() and setting
the dst-uri and flags as required.</div>
<div><br>
</div>
<div>However, calls are intermittently going to the wrong
TCP connection, despite the logs showing the correct
destination IP and port in the ONSEND route.</div>
<div><br>
</div>
<div>Looking in the location table I can see each
registration has a connection_id, and the debug log
indicates it's finding the connection by ID:</div>
<div><br>
</div>
<div> DEBUG: <core> [core/tcp_main.c:1651]:
_tcpconn_find(): found connection by id: 3<br>
</div>
<div><br>
</div>
<div>Is there a way to set the conid per branch? Is it
necessary?<br>
</div>
<div><br>
</div>
<div>We're using kamailio 5.3.3 on Debian 10.</div>
<div><br>
</div>
<div>Thanks</div>
<div>Matthew</div>
</div>
</blockquote>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
Kamailio (SER) - Users Mailing List
<a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.kamailio.org">sr-users@lists.kamailio.org</a>
<a class="moz-txt-link-freetext" href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a>
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Funding: <a class="moz-txt-link-freetext" href="https://www.paypal.me/dcmierla">https://www.paypal.me/dcmierla</a></pre>
</body>
</html>