[SR-Users] how to extract the ip address in the via header received paramter

[Daniel-Constantin Mierla]

Hello,

the received parameter is constructed from source IP of the incoming 
request. You get it via $si script variable.

Cheers,
Daniel

On 3/12/13 7:22 PM, Ajay Sabat wrote:
>
> Hi,
>
> I want to extract the IP address in the received parameter of the top 
> most via header of a response and use that in a custom header while 
> sending response back to the caller. Can somebody please tell how to 
> implement that in the Kamailio configuration file?
>
> I need to handle a NAT traversal scenario without enabling NAT in 
> Kamailio which is used as the proxy server. The caller which is in the 
> same network as Kamailio first sends a OPTIONS request to the callee 
> before sending the INVITE. It uses the public IP address returned in 
> the custom header of the OPTIONS response to build the contact header 
> and SDP of the INVITE request. In fact, it first looks for the IP 
> address in the received parameter of the via header to do that. But 
> Kamailio removes the top most via with received parameter and then 
> sends the OPTIONS response back to the caller. So we are using a 
> custom header for that purpose.
>
> I would appreciate other suggestions to achieve this in Kamailio, may 
> be by enabling NAT or some other alternative.
>
> Thanks,
>
> Ajay
>
>
>
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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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