[OpenSIPS-Users] drouting module with append_branch() and q-values

[Anca Vamanu]

Hi thrillerbe,

I think that if you only want to build the list of selected 
destinations, you can just call use_next_gw and add the uri in RURI to a 
destination string ( because use_next_gw sets the RURI to the 
destination- 
http://www.opensips.org/html/docs/modules/devel/drouting.html#id251519).
It would be something like this:

if (do_routing("1","2"))
{
     if ($avp(s:dr_rules_attrs) == "2")
     {
         xlog("L_INFO","After 1, ds is $ru\n");
         $var(x) = 2;
         $var(ds) = $ru;

         while (use_next_gw())
         {
$var(ds) = $var(ds) + "," + $ru;
             xlog("L_INFO","After $var(x), ds is $var(ds)\n");
             $var(x) = $var(x) + 1;
         }
     }
     xlog("L_INFO","Destination set is $var(ds)\n");
}


Regards,

-- 
Anca Vamanu
OpenSIPS Developer



On 03/29/2011 01:00 AM, thrillerbee wrote:
> I'm trying to get OpenSIPS to act as a REDIRECT server and have run 
> into a couple issues. I'm using the drouting module to do lookups. 
> Essentially, a dialed number could have potentially several routes, I 
> want to return a 300 with these routes in the Contact header. Please 
> tell me if this is foolish and/or there are better methods.
>
> I'm running release version 1.6.4-2-notls.
>
> With that, I've configured the following in my script:
> if (do_routing("1","2"))
>     {
>     if ($avp(s:dr_rules_attrs) == "2")
>     {
>         xlog("L_INFO","After 1, ds is $ds\n");
>         $var(x) = 2;
>         while (use_next_gw())
>         {
> append_branch();
>             xlog("L_INFO","After $var(x), ds is $ds\n");
>             $var(x) = $var(x) + 1;
>         }
>     }
>     xlog("L_INFO","Destination set is $ds\n");
> }
>
> My relevant debug output is:
> After 1, ds is Contact: sip:15552345678 at 1.1.1.1 
> <mailto:sip%3A15552345678 at 1.1.1.1>
> After 2, ds is Contact: *sip:2215552345678 at 2.2.2.2 
> <mailto:sip%3A2215552345678 at 2.2.2.2>, sip:2215552345678 at 2.2.2.2 
> <mailto:sip%3A2215552345678 at 2.2.2.2>*
> After 3, ds is Contact: *sip:5552345678 at 3.3.3.3 
> <mailto:sip%3A5552345678 at 3.3.3.3>*, sip:2215552345678 at 2.2.2.2 
> <mailto:sip%3A2215552345678 at 2.2.2.2>, *sip:5552345678 at 3.3.3.3 
> <mailto:sip%3A5552345678 at 3.3.3.3>*
> After 4, ds is Contact: *sip:15552345678 at 5.5.5.5 
> <mailto:sip%3A15552345678 at 5.5.5.5>*, sip:2215552345678 at 2.2.2.2 
> <mailto:sip%3A2215552345678 at 2.2.2.2>, sip:5552345678 at 3.3.3.3 
> <mailto:sip%3A5552345678 at 3.3.3.3>, *sip:15552345678 at 5.5.5.5 
> <mailto:sip%3A15552345678 at 5.5.5.5>*
> After 5, ds is Contact: *sip:4415552345678 at 4.4.4.4 
> <mailto:sip%3A4415552345678 at 4.4.4.4>*, sip:2215552345678 at 2.2.2.2 
> <mailto:sip%3A2215552345678 at 2.2.2.2>, sip:5552345678 at 3.3.3.3 
> <mailto:sip%3A5552345678 at 3.3.3.3>, sip:15552345678 at 5.5.5.5 
> <mailto:sip%3A15552345678 at 5.5.5.5>, *sip:4415552345678 at 4.4.4.4 
> <mailto:sip%3A4415552345678 at 4.4.4.4>*
>
> It seems that append_branch() deletes the first entry in the 
> destination set before adding the current RURI to the beginning and 
> end. Is there an easier or more predictable way to write to the 
> destination set?
>
> Also, it seems the append_branch() function will not take variables or 
> avps as parameters. Is there a known way of setting different q-values 
> as a destination set is generated?  The below obviously doesn't work 
> but should explain what I'm looking for:
>
> var(q) = 90;
> while (use_next_branch())
> {
>     append_branch("$ru","$var(q)");
>     $var(q) = $var(q) - 10;
> }
>
> Thanks,
> Ryan
>
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