26 Jul
2019
26 Jul
'19
5:45 p.m.
Hello Ali,
I think we had the similar problem. Then we found the S-CSCF configuration file contains
following snippet in main routing block:
if (($route_uri =~ "sip:orig@.*") ||
isc_from_as("orig")) {
xlog("Orig");
# we need something like this to assign SCSCF to
unregistered user for services
# support for AS origination on behalf of unregistered
useri
# can use the registrar is_registered methods - must see if
we need to check orig or term?
# Originating
route(orig);
break;
} else {
And we understood, if the AS originates an initial Request (as opposed to forwarding it),
then the S-CSCF should act as an originating S-CSCF, too.
So the AS that performs an “originating, unregistered” service, must add a “Route” header
with the indication of origin, e.g.
Route: <sip:orig@172.23.12.249:5060;lr>
To address the originating S-CSCF.
Just my two cent.
KR,
Christoph
From: sr-users <sr-users-bounces(a)lists.kamailio.org> On Behalf Of Ali Shirvani
Sent: Wednesday, July 24, 2019 2:49 PM
To: Kamailio (SER) - Development Mailing List <sr-dev(a)lists.kamailio.org>
Cc: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Subject: Re: [SR-Users] [sr-dev] IMS_ISC technical specification
Hello Mojtaba,
Thanks for your reply. You are completely correct, my current configuration work fine when
request initiated from UEs, but I want to handle SIP requests that initiated by
application server.
When UE sends request to S-CSCF, kamailio fetch iFC from HSS and check if the request
match with iFC or not, if it matched kamailio forward the request to the application
server.
But when application server send request to S-CSCF, isc_from_as('orig') return
false and I couldn't forward request to the target UE.
Regards,
Ali
On Wed, Jul 24, 2019 at 3:45 PM Mojtaba
<mespio@gmail.com<mailto:mespio@gmail.com>> wrote:
Hello Ali,
The SCSCF has IFC service for decision what it should do with incoming SIP message. During
check all rules in IFC, If it match with one or some rules, actually it marked with that
rules. Then the real meaning of marking is the SIP message is matched with one or some
rules in IFC.
With Best Regards.
On Wed, Jul 24, 2019 at 2:48 PM Ali Shirvani
<aj.shirvani@gmail.com<mailto:aj.shirvani@gmail.com>> wrote:
Hi all,
I read some portion of imc_isc_mod.c, specially isc_from_as function. In that function
there is some function call that searching for some marks in the SIP message. Also I read
section 5.7.3 from TS 24.229 but I didn't find the marking mechanism that used in
isc_from_as function.
Would you please point me to the technical specification that implemented in IMS_ISC
module?
Regards,
Ali
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--
--Mojtaba Esfandiari.S
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