Re: [SR-Users] Kamailio ims with TCP

Hello,

using UDP for forwarding is a configuration file action. Kamailio doesn't do any sip message forwarding unless there is such action in configuration file. If you want to use only tcp for sending out, be sure that request uri ($ru) or destination uri ($du) are SIP addresses with TCP transport.

Cheers, Daniel

On 26.02.18 21:22, Amar Tinawi wrote:

Hello Daniel

Thanks for your help, actually that is my question from the beginning, is it mandatory to have sockets for UDP ? Can I enable only TCP protocol between instances ?

On Mon, Feb 26, 2018 at 9:26 AM, Daniel-Constantin Mierla <miconda@gmail.com mailto:miconda@gmail.com> wrote:

Actually the error is because you try to forward via UDP (proto
1). Be sure you have listen parameter for UDP and TCP sockets.

Cheers,
Daniel


On 25.02.18 11:38, Amar Tinawi wrote:

...

TCP alone errors were strange : on the proxy node i couldn't
register and got the following errors : 
Feb 25 12:15:28 server1 [Proxy-CSCF][31641]: ERROR: tm
[ut.h:303]: uri2dst2(): no corresponding socket for
"NET.SYRIATEL" af 2
Feb 25 12:15:28 server1 [Proxy-CSCF][31641]: ERROR: tm
[t_fwd.c:469]: prepare_new_uac(): can't fwd to af 2, proto 1  (no
corresponding listening socket)
Feb 25 12:15:28 server1 [Proxy-CSCF][31641]: ERROR: tm
[t_fwd.c:1735]: t_forward_nonack(): failure to add branches
Feb 25 12:15:28 server1 [Proxy-CSCF][31641]: ERROR: siptrace
[siptrace.c:1930]: trace_send_hep2_duplicate(): can't forward to
af 2, proto 1 no corresponding listening socket
Feb 25 12:15:28 server1 [Proxy-CSCF][31641]: ERROR: sl
[sl_funcs.c:362]: sl_reply_error(): stateless error reply used:
I'm terribly sorry, server error occurred (7/SL)
=====================================================================================

These errors appearing when using two TCP and UDP, i could be
able to register and make calls but still get errors
Feb 25 11:37:15 server1 [Proxy-CSCF][28999]: ERROR:
ims_usrloc_pcscf [udomain.c:409]: update_pcontact(): Error
updating record in DB
Feb 25 11:37:15 server1 [Proxy-CSCF][28999]: ERROR:
ims_registrar_pcscf [notify.c:218]: process_contact(): failed to
update pcscf contact
Feb 25 11:37:15 server1 [Proxy-CSCF][28999]: ERROR: tm
[tm.c:1242]: w_t_reply(): cannot send a t_reply to a message for
which no T-state has been established

In addition i cleaned all UDP SRV related records from DNS zone
and tried to forced all instances in the TCP mode configuration

**Also, in the TCP mode all the  ip addresses that the
registrations comes from are not the real ip's of the users, and
also this is very strange
i got some random  IP's

On Fri, Feb 23, 2018 at 10:41 AM, Daniel-Constantin Mierla
<miconda@gmail.com <mailto:miconda@gmail.com>> wrote:

    Hello,

    have you look at syslog messages? Are there any errors?
    Between Kamailio instances, tcp for sip should work. Check
    also configs to be sure UDP is not enforced there.

    Cheers,
    Daniel


    On 22.02.18 12:40, Amar Tinawi wrote:

...

    Hello list 

    For some reason i couldn't register on kamailio ims when i
    use only TCP protocols between nodes, the error was solved
    when i enabled UDP between I-CSCF and S-CSCF


    is it mandatory for those two nodes to talk over UDP only ?
    or i'm missing something ? 
    and in general for sip protocol which is better ? UDP or TCP ?


    Regards,


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    Daniel-Constantin Mierla
    www.twitter.com/miconda <http://www.twitter.com/miconda> -- www.linkedin.com/in/miconda <http://www.linkedin.com/in/miconda>
    Kamailio Advanced Training - March 5-7, 2018, Berlin - www.asipto.com <http://www.asipto.com>
    Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com <http://www.kamailioworld.com>

-- 
Daniel-Constantin Mierla
www.twitter.com/miconda <http://www.twitter.com/miconda> -- www.linkedin.com/in/miconda <http://www.linkedin.com/in/miconda>
Kamailio Advanced Training - March 5-7, 2018, Berlin - www.asipto.com <http://www.asipto.com>
Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com <http://www.kamailioworld.com>