[SR-Users] Use AVP as regex in avp_subst

[Uriel Rozenbaum]

Hi Daniel,

Actually I'm going to partially take your advice, implementing the following:

exec_avp("echo '$avp(s:ANI)' | sed '$avp(s:carrierAniRegex)'",
"$avp(s:ANIegress)");

I'll check for performance issues later but surely this simplifies a
lot the config.

Thanks!
Uriel

On Thu, Jul 8, 2010 at 5:55 AM, Daniel-Constantin Mierla
<miconda at gmail.com> wrote:
> Hello,
>
> On 7/7/10 11:06 PM, Uriel Rozenbaum wrote:
>>
>> Hey guys,
>>
>> I'm using Kamailio 1.5.3-notls and need to apply some re operation to an
>> AVP.
>>
>> The problem I have is that my re expression is held in an AVP, so the
>> parser is not recognizing it :(
>>
>> Would it be very hard to change that behavior? Any ideas/tips to
>> implement?
>>
>> This code
>>   route[16]
>>   {
>>     ...
>>   avp_subst("$avp(s:ANI)/$avp(s:ANIegress)", "$avp(s:carrierAniRegex)");
>>     ...
>>   }
>>
>> returns this error
>>   ERROR:avpops:fixup_subst: avpops: bad subst re $avp(s:carrierAniRegex)
>>
>> This code
>> route[16]
>>   {
>>     ...
>>   avp_subst("$avp(s:ANI)/$avp(s:ANIegress)", $avp(s:carrierAniRegex));
>>     ...
>>   }
>>
>> returns this error
>>   CRITICAL:core:yyerror: parse error in config file, line 751, column
>> 51-74: syntax error
>>   CRITICAL:core:yyerror: parse error in config file, line 751, column
>> 74-75: bad arguments
>>
>> Do you think some other way I can achieve this? Be aware I'm using
>> SQLops to get realtime the value of the expression...
>>
>
> avp_subst() cannot help here, there is no support for taking the
> substitution expression from a variable.
>
> What you can do in 1.5 is either look at dialplan to see if it fits your
> needs (it can do such substitution with expressions taken from db at
> startup, which can be reloaded at runtime), otherwise try using perl module
> (or exec in 1.5+ and lua/python in devel).
>
> Cheers,
> Daniel
>
> --
> Daniel-Constantin Mierla
> http://www.asipto.com/
>
>