[Freeswitch-users] Channel variables for npdi and rn on LRN dipped calls.

[Victor Chukalovskiy]

Michael and Ken,

Thanks for setting me on the right track! What I end-up configuring for 
now is:

^(?:1)?([2-9]\d{2}[2-9]\d{6})(?:;npdi=(?:yes|no))?(?:;rn=([2-9]\d{2}[2-9]\d{6}))?(?:;npdi=(?:yes|no))?

It puts destination number in $1. It also puts LRN in $2 provided it's 
supplied. Either yes or no are allowed for npdi=. I'm not capturing 
npdi= into any variable because as I realized all I really need is LRN.

For example, all of these:
6045555555;npdi=yes;rn=7785550001
6045555555;rn=7785550001;npdi=yes
16045555555;npdi=yes;rn=7785550001
6045555555;rn=7785550001

Will pass and result in:
$1=6045555555
$2=7785550001

And all of these:
6045555555
16045555555
6045555555;npdi=yes
6045555555;npdi=no

Will also pass and give:
$1=6045555555
$2=empty

I'll be glad if this regexp example helps someone.

Cheers,
-Victor

On 13-01-07 08:59 PM, Michael Collins wrote:
> In this case the ? modifies the *, so there's .* (greedy) and .*? (not 
> greedy)
>
> You want your .* to match as little as possible instead of as much as 
> possible. If you use .* instead of .*? then your $2 would contain both 
> the ndpi info but also it would have ";rn=18005551212" b/c the .* 
> would grab all that stuff. The .*? would only grab up to the ";rn".
>
> Just adding that info for posterity's sake. :)
>
> -MC
>
> On Mon, Jan 7, 2013 at 5:05 PM, Ken Rice <krice at freeswitch.org 
> <mailto:krice at freeswitch.org>> wrote:
>
>     Ooops yeah I mean .*... The ? Is pretty useless there... Since
>     there should always be something if they send ndpi=
>
>
>     On 1/7/13 7:00 PM, "Michael Collins" <msc at freeswitch.org
>     <http://msc@freeswitch.org>> wrote:
>
>
>         Just a quick FYI... be careful when you use .* because it will
>         try to match EVERYTHING. Also, Ken accidentally typed (*.)
>         which I'm sure wasn't what he was aiming for. ;)
>
>         Maybe this would be more effective:
>         ^(?:+1|1)?([2-9]\d{2}[2-9]\d{6});ndpi=(.*?);rn=([2-9]\d{2}[2-9]\d{6})$
>
>         -MC
>
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> Michael S Collins
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