Hi Alex,

Did you ever figure this out? We've run into a very similar (if not identical) issue.

Thanks -Brooks

-----Original Message----- From: sr-users [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of Alex Balashov Sent: Tuesday, March 31, 2015 3:36 PM To: SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) - Users Mailing List Subject: [SR-Users] Variable interpolation in xavp identifiers

Hello,

There seems to be an implementational difference in interpolation of PVs in AVP and XAVP identifiers and/or field names.

The pseudovariables documentation[1] on classical AVPs says:

The 'id' can be:

...

pseudo variable - if value of pv is integer, id is integer, if string, id is string

So, for example, this composition of variables works:

$var(f) = 'donkey'; $avp($var(f) = 'eehaw';

xlog("L_INFO", "Donkey says: $avp(donkey)\n");

It correctly prints:

Donkey says: eehaw

Making some assumptions, I tried this, and it did not work similarly as expected:

$var(f) = 'donkey'; $xavp(r=>$var(f)) = 'eehaw';

xlog("L_INFO", "Donkey says: $xavp(r=>donkey)\n");

This prints:

Donkey says: <null>

And a PV dump confirms that the PV value is not interpolated:

Mar 31 18:26:15 localhost /usr/local/sbin/kamailio[2399]: INFO: debugger [debugger_api.c:1799]: dbg_dump_json(): {"$xavp(r)":[{"$var(f)":["eehaw"]}]}

Interpolation of variables does not work for either field or stem names.

Is this a design principle of XAVPs, or an oversight?

Thanks,

-- Alex

[1] http://www.kamailio.org/wiki/cookbooks/4.2.x/pseudovariables#avp_id_-_avps

-- Alex Balashov | Principal | Evariste Systems LLC 303 Perimeter Center North, Suite 300 Atlanta, GA 30346 United States

Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/

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