[SR-Users] Changing Domain in To URI

Daniel-Constantin Mierla miconda at gmail.com
Sat Apr 6 21:43:37 CEST 2013


Hello,

On 4/6/13 1:29 AM, qmail at polarismail.com wrote:
> Mersi mult Daniel! It worked but unfortunately it didn't fix the issue.
>
> As I mentioned previously the original setup is like this:
>
> Asterisk -> Kamailio gateway -> carrier. All calls go through just fine
>
> The new setup we are trying is:
>
> Asterisk -> Kamailio load balancer ( dispatch module ) -> Kamailio 
> gateway -> carrier
>
> With this setup the calls come back from the carrier with 500 - 
> Internal error
maybe if you paste the ngrep output for such messages we can spot if 
something is wrong.

>
> I've looked at the SIP packets in both cases and they look similar. 
> The only difference is that when going through the load balancer the 
> To is different ( fixed now ) and it has 3 more VIA lines in the 
> header. Where can I start looking at what's causing this ?

Three more via headers, added by the load balancer? That means the 
request is looping back two times? Have you watched the loopback 
interface? Sound like broken routing logic in the config.

Cheers,
Daniel

>
> Thank you!
>
> Quoting Daniel-Constantin Mierla <miconda at gmail.com>:
>
>> Changes are not immediately visible, this is the internal design from 
>> the time of SER back in 2001 -- I made a FAQ entry with more details:
>>
>> - 
>> http://www.kamailio.org/wiki/tutorials/faq/main#why_changes_made_to_headers_or
>>
>> In short, you have to use msg_apply_changes() function after changing 
>> headers.
>>
>> Cheers,
>> Daniel
>>
>> On 4/5/13 10:35 PM, Vitaliy Aleksandrov wrote:
>>> http://kamailio.org/docs/modules/3.2.x/modules_k/textops.html#id2495808
>>> I use this subst("/^To:.*$/To: $var(new_to)\r/i") where $var(new_to) 
>>> is a new value of the "To" header and it works fine on kamailio-3.2.4
>>>
>>>> Sorry if I repeat myself - I just subscribed properly to the list:
>>>>
>>>>> if you don't need to change it back for replies and next requests, 
>>>>> try:
>>>>>
>>>>> $td = "xyz.com";
>>>>>
>>>>> IIRC, that is available on 3.2.x. If not, either you upgrade or 
>>>>> use replace functions from textops.
>>>>>
>>>>> Cheers,
>>>>> Daniel
>>>>
>>>> Thank you for replying. We tried the direct assignment of 
>>>> $td="xyz.com" but the variable doesn't change. We are doing an xlog 
>>>> print right after and an ngrep and we confirmed that the domain 
>>>> part of the URI doesn't change. I also tried a subst() and it's the 
>>>> same problem. I read on the online documentation that the variable 
>>>> is read-only and I figured it can't be changed through these 
>>>> methods. That's why I tried uac_replace_to().
>>>>
>>>> To sum it up, is that variable read-only or not ?
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing 
>>>> list
>>>> sr-users at lists.sip-router.org
>>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>>
>>>
>>> _______________________________________________
>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>>> sr-users at lists.sip-router.org
>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
>> -- 
>> Daniel-Constantin Mierla - http://www.asipto.com
>> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
>> Kamailio World Conference, April 16-17, 2013, Berlin
>>  - http://conference.kamailio.com -
>>
>>
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>> sr-users at lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
>
>
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-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio World Conference, April 16-17, 2013, Berlin
  - http://conference.kamailio.com -




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