Kamailio - get first occurrence value of a param in a string

Question

I need to get the value of first tgrp param in this string using Kamailio :

$var(x) = <sip:xxxxxxxxx;tgrp=0001000;[email protected]:5060;transport=UDP;user=phone;tgrp=237>

I’m trying $var(y) = $(var(x){param.value,tgrp}); but it’s getting the last value of tgrp which is 237>.

Noting that first tgrp is not always in the second index , some other parameters can be added to the string.

How to get the value of first occurrence of tgrp param ?

Answer 1

param.value string operations designed to work with unique params names.

You can loop over all params using for loop and checking {param.name,index}

Answer 2

Try a solution based on xavp_params_explode():

• https://kamailio.org/docs/modules/stable/modules/pv.html#pv.f.xavp_params_explode

Something like:

xavp_params_explode("$(var(x){s.unbracket})", "x");
xdbg("$xavp(x=>tgrp[0])"); # <- print the value of first parameter tgrp

The index [0] can be omitted, without it first value being returned, but if you want the second param value, then use [1] as index.