[SR-Users] parse errors in rr-callback of path module

[Daniel-Constantin Mierla]

Hello,

On 9/14/11 9:55 AM, Andreas Granig wrote:
> Hi Daniel,
>
> On 09/14/2011 08:30 AM, Daniel-Constantine Mierla wrote:
>> Seems like the rr params value is not set properly. I looked in rr module and such case can happen indeed, but for the case when uri in rr does not match myself. Is this also in your case? I wonder anyhow why the callbacks are executed in route header uri is not local address...
> Indeed it happens when it doesn't match itself.
ok, so then it is found, fix to be done later.

However, I wonder if it makes sense to execute the rr calbacks when the 
uri does not match myself. IIRC, the purpose of rr callbacks was to 
access parameters added by proxy itself in record-route header which 
should be mirrored by route headers. Do I misunderstand their goal? 
Afaik path, dialog and uac modules use them to get parameters for dialog 
id, from header recovery ... which are added by proxy itself. Not sure 
for path module, is it about accessing parameters set by same instance 
in record-route?

Cheers,
Daniel

>
>> Btw, were all hops in the signaling performing loose routing or some did strict routing?
> Well, the use-case is this:
>
> REGISTER sip:mydomain.com:5060
> Route:<sip:mydomain.com;lr>
> To:<sip:myuser at mydomain.com>
>
> So it's an initial REGISTER with no to-tag but with a Route header (e.g.
> pjsip loves to do that for some reason for every initial request). We're
> using Kamailio as a load-balancer (this is where the error occurs) in
> the SPCE, and we don't set any "alias" parameter there, so the Route is
> not considered local.
>
> Instead, we're doing something like this:
>
> if(loose_route()) {
>    if(!has_totag()) {
>      $du = $null;
>      # send off to proxy using dispatcher
>    } else {
>      t_relay();
>    }
> }
>
> Then on the proxy we check again after loose_route() using
> is_domain_local("$dd") to either silently consume routes which are in
> our domain table or to reject them if not.
>
> Thanks,
> Andreas
>
>
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-- 
Daniel-Constantin Mierla -- http://www.asipto.com
Kamailio Advanced Training, Oct 10-13, Berlin: http://asipto.com/u/kat
http://linkedin.com/in/miconda -- http://twitter.com/miconda

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