[SR-Users] Kamailio E164 Normalisation

[Daniel-Constantin Mierla]

On 02/11/15 18:52, Daniel Tryba wrote:
> On Monday 02 November 2015 17:28:29 Daniel Bryars wrote:
>> So I'm investigating if it's possible to fix up the number and add the + in
>> Kamailio. Clearly I could detect if the number starts with 44 and change
>> this to +44, but this seems very brittle (what about other international
>> numbers) - it there a proper way to do this, or a standard module?
> I do it with a couple of regexps for $fU/$tU$rU. You just have to make some 
> assumtions. It pretty stupid straight forward code, transforming to "e164 
> plus" format and than back to the endpoint specific settings:
>
>         $avp(ntU)=$tU;
>
>         if($tU=~"^00[1-9][0-9]+$")
>         {
>                 $avp(ntU)="+"+$(tU{s.substr,2,0});
>         }
>         else if($tU=~"^0[1-9][0-9]+$")
>         {
>                 $avp(ntU)="+31"+$(tU{s.substr,1,0});
>         }
>         else if($tU~="^[2-8][0-9]{5,6}$")
>         {
>                 $avp(ntU)="+31"+$avp(areacode)+$tU;
>         }
>         else 
>         {
>                 $avp(ntU)="+"+$tU;
>         }
>
>
>
> and use $avp(ntU) with uac_replace_to (after modifiying $ntU to the format 
> desired by endpoint (yet more regexps like above)).
>
> Repeat for $fU and $rU. You might want to to this in an external script 
> instead of kamailio config script though. 
>
> If there is a better way, I'd like to know myself.
>
Dialplan module can be used to do those transformations -- if you have
many countries, you can group the country rules under same dialplan id.
I used to set dialplan id to to the country code then associate users
with it via extra column in subscriber table (which can be loaded with
load_credentials parameter in auth_db module). A second extra column
might be needed for area code.

Maybe worth collecting the dialplan module rules for different country
in a wiki page, so people that are familiar with various countries can
contribute.

Cheers,
Daniel

-- 
Daniel-Constantin Mierla
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