[sr-dev] [kamailio/kamailio] SCSCF failing to send INVITE to application server. (Issue #3015)

[Aleksandar Yosifov]

Hi,
Because Term User is extracted from Request-URI. Just open INVITE msg from
the attached pcap file and you will see that RURI is the same as in the log
message " tel:405874000000955".


int cscf_get_terminating_user( struct sip_msg * msg, str *uri )
{
    *uri = cscf_get_public_identity_from_requri(msg);

On Tue, Feb 1, 2022 at 5:12 PM SJ286 <notifications at github.com> wrote:

> We are trying to test private VoLTE setup with real UEs using open5gs EPC
> , kamailio IMS and application server. We see INVITE request reaching till
> term-SCSCF with URL (sip:405874000000955 at ims.mnc874.mcc405.3gppnetwork.org;user=phone)
> but it is not forwarding request to application server. SCSCF is trying to
> fetch IMPU record for application server with tel uri even though it
> receives SIP uri in INVITE message. Hence fails to reach application server.
>
> Could anyone help us on why 'isc_match_filter()' function is returning tel
> uri even though it is receiving sip uri in message?
>
> Attaching log and pcap for reference.
> SCSCF logs
>
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [ims_isc_mod.c:253]: isc_match_filter(): Starting triggering
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [ims_isc_mod.c:323]: isc_match_filter(): Checking if ISC is for originating
> user
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [ims_isc_mod.c:362]: isc_match_filter(): Checking if ISC is for terminating
> user
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [ims_isc_mod.c:372]: isc_match_filter(): ISC is for Term user
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [checker.c:586]: isc_is_registered(): Searching in usrloc
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [checker.c:589]: isc_is_registered(): no record exists for
> [tel:405874000000955]
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [ims_isc_mod.c:380]: isc_match_filter(): Term User tel:405874000000955 [0]
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [ims_isc_mod.c:383]: isc_match_filter(): Checking if RURI has
> changed...comparing: <> and tel:405874000000955
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [ims_isc_mod.c:390]: isc_match_filter(): Resuming triggering
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [checker.c:586]: isc_is_registered(): Searching in usrloc
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [checker.c:589]: isc_is_registered(): no record exists for
> [tel:405874000000955]
> �[33;1mscscf |�[0m �[0;39;49m�[0;39;49m 3(34) DEBUG: ims_isc
> [checker.c:431]: isc_checker_find(): isc_checker_find: starting search
> �[33;1mscscf |�[0m �[0;39;49m�[0;31;49m 3(34) ERROR: ims_isc
> [checker.c:448]: isc_checker_find(): Failure getting IMPU record for
> [tel:405874000000955] - ISC checker find METHOD: [INVITE]
>
> open5gs_test67.zip
> <https://github.com/kamailio/kamailio/files/7979412/open5gs_test67.zip>
>
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