30 Aug
2024
30 Aug
'24
12:11 p.m.
Hello,
On 28.08.24 15:46, panda.paresh--- via sr-users wrote:
Hi,
I was trying this out , but somehow Kamailio is not liking it. I am getting below error
Aug 27 14:04:27 kamailio01 /usr/sbin/kamailio[1135093]: DEBUG: <core>
[core/tcp_main.c:2879]: tcpconn_do_send(): buf=#012SIP/2.0 500 I'm terribly sorry,
server error occurred (1/TM)#015#012Via: SIP/2.0/TCP
192.168.136.153:5061;branch=z9hG4bK-29059-1-0;rport=5061#015#012From: +14164568558
<sip:+14164568558@192.168.136.153:5062>#015#012Call-ID:
1-29059(a)192.168.136.153#015#012 .....
What I observe is that previous to send_tcp function I am using some transaction related
functions like t_suspend/t_continue. and becuse of the tm module I am getting this error.
My query is : do Kamailio can work in both modes ?, some parts transaction way(for
internal interfaces like rabbit MQ(kazoo) and some parts(final relay part, send tcp way
(stateless)?
Thank you so much for the quick reply to my previous query!
the debug message is from tm module, so the send_tcp() is not the reason
for that log.
But t_suspend()/t_continue() are designed to work only with the other tm
functions (e.g., t_relay()) and using send_tcp() is not updating the
transaction state, which at some point is going to time out and send
some response back.
Otherwise, Kamailio should work fine with mixing send_tcp() and
transactions, but be sure you also reply (or the next hop replies) when
using send*() functions, because they are just like writing to the
socket/connection, is not even doing stateless sip forwarding as no Via
header is added, therefore retransmissions are expected. Also, the next
hop might no be able to send the sip reply properly, if the initial
sender is behind nat. I do not know your scenarios/needs. but it can be
tricky to get it working properly if UAs are behind nat/firewall.
Cheers, Daniel
--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
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