[Kamailio-Users] Checking the destination IP after dispatcher

[Alex Balashov]

On 01/12/2010 06:35 AM, Daniel-Constantin Mierla wrote:
> Hello,
>
> On 1/11/10 6:55 PM, Geoffrey Mina wrote:
>> this was from a regular route[] block. I ended up finding an old
>> thread which pointed me in the right direction.
>>
>> I am currently using this to retrieve the destination IP POST
>> dispatcher lookup:
>>
>> $var(destIP) = $(ru{s.select,1,:}{s.select,1,@});
>>
>> It seems to be working well. Anything I should be aware of while
>> using this technique?
>
> actually ds_next_dst() populates the dst uri, which is accessible via
> $du. Make sure ds_append_branch parameter is set to 0:
> http://kamailio.org/docs/modules/3.0.x/modules_k/dispatcher.html#id2543896
>
> Then you call append_branch() after doing your IP check.
>
> If you do ds_next domain() then you get the new address in r-uri
> (therefore $ru).
>
> To get access to dest uri domain, simply use: $dd.
>
> Your expression with transformations will give you the ip along with
> protocol and uri parameters, if they are present in r-uri.

Oh, so that's the difference between ds_next_dst() and ds_next_domain()? 
  I never did figure that out and always used ds_next_domain().  Thanks 
Daniel!

So, Kamailio operates on the dst_uri in the same way that a UA uses an 
'outbound proxy' setting - i.e. relays a call to RURI sip:user1 at domain 
through proxy x.x.x.x?

-- 
Alex Balashov - Principal
Evariste Systems
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