New subject: R: publish authentication problem

24 Apr 2015


      Hello everyone,
I've been working on a project where I would like to implement RFC6035
https://tools.ietf.org/html/rfc6035
Basically, after the end of the call, our SIP UAC sends a SIP PUBLISH to Kamailio where there are some useful information about media quality (packet loss, mos, etc..)
This information is stored by Kamailio with sql_query command...
To achieve this, I implemented a custom route function inside Kamailio cfg file, which handles PUBLISH request, check vq-rtcpxr body and store that information into a database.
Here is a snippet code:
# AVPF report route
route[AVPF] {
        if(!is_method("PUBLISH"))
                return;
        if (has_body("application/vq-rtcpxr"))
        {
$var(x) =  "INSERT INTO quality_reporting_raw(body) VALUES ("" + $(rb{s.escape.common}) + "");";
                sql_query("cb", "$(var(x))");
                ...... reply 200 ok and so on....
exit(0)
        }
}
Everything works fine (almost fine, because the report is stored twice...) if I do the route(AVPF) before authentication, like this...
(main route):
        # handle AVPF reports
        route(AVPF);
# authentication
        route(AUTH);
Instead if I swap these two functions, doing the authentication before publish processing, I have some problems about publish authentication....not for the other requests (INVITE and REGISTER)
As far as I know From, To and Request-URI must match the authentication user, in the PUBLISH REQUEST as described here
http://kamailio.org/docs/modules/4.2.x/modules/auth_db.html#auth_db.f.auth_c...
I confirm that...I'm sending the SIP PUBLISH from user 101 to user 101, which is currently registered.
My problem is that Kamailio is continuously answering with 407 to the SIP PUBLISH, even if the PUBLISH request has the right Proxy-Authorization header...
Digging into the log file, I found this :
Apr 24 14:30:58 bptrnddmzserver kamailio[30886]: DEBUG: auth_db [authorize.c:486]: auth_check(): realm [myhome2.xip.bpt.com] table [subscriber] flags [1]
Apr 24 14:30:58 bptrnddmzserver kamailio[30886]: DEBUG: auth [api.c:86]: pre_auth(): auth:pre_auth: Credentials with realm 'myhome2.xip.bpt.com' not found
Apr 24 14:30:58 bptrnddmzserver kamailio[30886]: DEBUG: auth_db [authorize.c:252]: digest_authenticate_hdr(): no credentials
Just for your better understanding I'm doing authorization with db, using subscriber table where there are all the users with 'myhome2.xip.bpt.com' domain...
In fact, all INVITEs and REGISTERs are correctly authenticated...
Would you mind address me to find out the problem? Maybe, there's something wrong in my cfg file.
Thanks in advance
T,
Tomas Zanet
Software Design Department
tzanet@came.com
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