19 Mar
2021
19 Mar
'21
1:13 p.m.
We don't see the issue when using the standard lookup() function, only when
we start manually appending branches with the results
from reg_fetch_contact()
Thanks
Matthew
On Wed, Mar 17, 2021 at 7:18 AM Daniel-Constantin Mierla <miconda(a)gmail.com>
wrote:
Hello,
On 11.03.21 10:55, Marrold wrote:
Hi Daniel,
I didn't spot those TCPOPs functions, I'll give them a try and let you
know how I get on.
Do you have any idea why Kamailio is intermittently selecting the wrong
connection using ID vs peer address?
have you tried and got that with lookup("location") or only with your
script-based reg_fetch_contact()?
Cheers,
Daniel
Thanks for the suggestions.
Matthew
On Wed, Mar 10, 2021 at 7:27 AM Daniel-Constantin Mierla <
miconda(a)gmail.com> wrote:
Hello,
a while ago I did some work to make possible to specify the outgoing tcp
connection id, see:
*
https://www.kamailio.org/docs/modules/stable/modules/tcpops.html#tcpops.f.t…
And the next function after it.
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.
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().
Cheers,
Daniel
On 10.03.21 06:00, Marrold wrote:
Hi,
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.
I did a bit more troubleshooting and observed the differences in the
debug log between two identical calls:
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:
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:
sip:442079460000@10.0.130.218:5060 du: sip:203.0.113.1:1046 ulc_conid: 0
flags: 192 ci: 162e3e84-4036-48d7-a1d1-79cc92b7cea4-2-1@sip-server-01
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:
sip:442079460000@10.0.130.241:50130;transport=TCP du:
sip:203.0.113.1:50130;transport=tcp ulc_conid: 13 flags: 192 ci:
162e3e84-4036-48d7-a1d1-79cc92b7cea4-2-1@sip-server-01
The debug log shows the wrong connection was found *by id, *which in
this case was 2, but should have been 13:
Mar 9 10:30:21 proxy-01 /sbin/kamailio[27014]: INFO: <script>: ONSEND:
rm: INVITE ru: sip:442079460000@10.0.130.218:5060 du: sip:
203.0.113.1:1046 proto: udp src: 185.28.212.61:5060 dest:
203.0.113.1:1046 ci:
162e3e84-4036-48d7-a1d1-79cc92b7cea4-2-1@sip-server-01
Mar 9 10:30:21 proxy-01 /sbin/kamailio[27014]: INFO: <script>: ONSEND:
rm: INVITE ru: sip:442079460000@10.0.130.218:5060 du: sip:
203.0.113.1:1046 proto: tcp src: 185.28.212.61:5062 dest:
203.0.113.1:50130 ci:
162e3e84-4036-48d7-a1d1-79cc92b7cea4-2-1@sip-server-01
Mar 9 10:30:21 proxy-01 /sbin/kamailio[27014]: DEBUG: <core>
[core/tcp_main.c:1651]: _tcpconn_find(): found connection by id: 2
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)
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:
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:
sip:442079460000@10.0.130.218:5060 du: sip:203.0.113.1:1046 ulc_conid: 0
flags: 192 ci: 95ba0691-bdfc-4293-b99d-d46946cb5180-2-1@sip-server-01
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:
sip:442079460000@10.0.130.241:50130;transport=TCP du:
sip:203.0.113.1:50130;transport=tcp ulc_conid: 13 flags: 192 ci:
95ba0691-bdfc-4293-b99d-d46946cb5180-2-1@sip-server-01
The debug log shows the correct connection was found *by peer address *and
determined the correct connection 13:
Mar 9 10:42:31 proxy-01 /sbin/kamailio[27016]: INFO: <script>: ONSEND:
rm: INVITE ru: sip:442079460000@10.0.130.218:5060 du: sip:
203.0.113.1:1046 proto: udp src: 185.28.212.61:5060 dest:
203.0.113.1:1046 conid: <null> ci:
95ba0691-bdfc-4293-b99d-d46946cb5180-2-1@sip-server-01
Mar 9 10:42:31 proxy-01 /sbin/kamailio[27016]: INFO: <script>: ONSEND:
rm: INVITE ru: sip:442079460000@10.0.130.218:5060 du: sip:
203.0.113.1:1046 proto: tcp src: 185.28.212.61:5062 dest:
203.0.113.1:50130 conid: <null> ci:
95ba0691-bdfc-4293-b99d-d46946cb5180-2-1@sip-server-01
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)
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
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 the standard lookup()
function.
Does anyone know why Kamailio is intermittently switching between finding
by peer address and id, and why it's using the wrong ID?
Thanks again
Matthew
On Tue, Mar 9, 2021 at 8:56 AM Marrold <kamailio(a)marrold.co.uk> wrote:
Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda --
www.linkedin.com/in/miconda
Funding: https://www.paypal.me/dcmierla
Hi all,
I'm currently adding a feature to our Kamailio configuration to fork
calls based on user agent.
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.
However, calls are intermittently going to the wrong TCP connection,
despite the logs showing the correct destination IP and port in the ONSEND
route.
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:
DEBUG: <core> [core/tcp_main.c:1651]: _tcpconn_find(): found connection
by id: 3
Is there a way to set the conid per branch? Is it necessary?
We're using kamailio 5.3.3 on Debian 10.
Thanks
Matthew
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Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda --
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