Re: Replacing certain route blocks with KEMI scripts

Hi,

IMHO, you would be better off doing this as classic inline Python (e.g. via app_python3), rather than via KEMI.

Cheers,

-- Alex

> On Mar 18, 2026, at 10:20 AM, Dries De Gendt via sr-users <[email protected]> wrote:
> 
> Hi,
> 
> I was wondering if it is possible of keeping the request_route as native configuration, while replacing certain route blocks such as AUTH/REGISTRAR with python KEMI instead?
> 
> The idea is to implement RFC8898, which basically requires me to challenge for bearer token and validate it afterwards if returned by the client. For my convencience, I had defined the AUTH and REGISTRAR block in python KEMI, and was calling them as such:
> 
> request_route {
> ...
> 
> $var(auth_route_ret) = python_exec("ksr_route_auth", "test\n");
> xlog("$var(debug_level)", "[KSR_AUTH] Return code Kamailio is $var(auth_route_ret)");
> if ($var(auth_route_ret) == -255) {
>    exit;
> }
> 
> ...
> $var(registrar_route_ret) = python_exec("ksr_route_registrar", "test\n");
> xlog("$var(debug_level)", "[KSR_REGISTRAR] REGISTRAR return code Kamailio is $var(registrar_route_ret)");
> if ($var(registrar_route_ret) == -255) {
>    exit;
> }
> ...
> 
> }
> 
> While the register itself seems to work, it seems that other blocks seem to fail as they would likely expect KSR?
> 
> ERROR: {1 112367482 INVITE f0af27cd-9d75-123f-79a9-b4e9b8034b4e} <core> [core/kemi.c:3772]: sr_kemi_cbname_lookup_idx(): index 1 is out of range
> 
> Any idea if this would be possible, or should I determine wether to go native cfg or KEMI?
> 
> Best regards,
> Dries
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--
Alex Balashov
Principal Consultant
Evariste Systems LLC
Web: https://evaristesys.com, https://www.csrpswitch.com
Tel: +1-706-510-6800

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